3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
27 * Be proud that perl(1) may proclaim:
28 * Setuid Perl scripts are safer than C programs ...
29 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
31 * The flow was: perl starts, notices script is suid, execs suidperl with same
32 * arguments; suidperl opens script, checks many things, sets itself with
33 * right UID, execs perl with similar arguments but with script pre-opened on
34 * /dev/fd/xxx; perl checks script is as should be and does work. This was
35 * insecure: see perlsec(1) for many problems with this approach.
37 * The "correct" flow should be: perl starts, opens script and notices it is
38 * suid, checks many things, execs suidperl with similar arguments but with
39 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
40 * same, checks arguments match #! line, sets itself with right UID, execs
41 * perl with same arguments; perl checks many things and does work.
43 * (Opening the script in perl instead of suidperl, we "lose" scripts that
44 * are readable to the target UID but not to the invoker. Where did
45 * unreadable scripts work anyway?)
47 * For now, suidperl and perl are pretty much the same large and cumbersome
48 * program, so suidperl can check its argument list (see comments elsewhere).
51 * Original bug report:
52 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
53 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
54 * Comments and discussion with Debian:
55 * http://bugs.debian.org/203426
56 * http://bugs.debian.org/220486
57 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
58 * http://www.debian.org/security/2004/dsa-431
60 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
61 * Previous versions of this patch sent to perl5-porters:
62 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
63 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
64 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
65 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
67 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
68 School of Mathematics and Statistics University of Sydney 2006 Australia
72 * Use truthful, neat, specific error messages.
73 * Cannot always hide the truth; security must not depend on doing so.
77 * Use global(?), thread-local fdscript for easier checks.
78 * (I do not understand how we could possibly get a thread race:
79 * do not all threads go through the same initialization? Or in
80 * fact, are not threads started only after we get the script and
81 * so know what to do? Oh well, make things super-safe...)
85 #define PERL_IN_PERL_C
87 #include "patchlevel.h" /* for local_patches */
91 char *nw_get_sitelib(const char *pl);
94 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
99 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
101 # include <sys/wait.h>
104 # include <sys/uio.h>
109 char control[CMSG_SPACE(sizeof(int))];
126 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
127 char *getenv (char *); /* Usually in <stdlib.h> */
130 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 /* Drop scriptname */
135 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, fdscript, suidscript, linestr_sv, rsfp)
137 /* Drop suidscript */
138 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, scriptname, fdscript, linestr_sv, rsfp)
141 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
142 /* Drop everything. Heck, don't even try to call it */
143 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
145 /* Drop almost everything */
146 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
150 #define CALL_BODY_EVAL(myop) \
151 if (PL_op == (myop)) \
152 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
156 #define CALL_BODY_SUB(myop) \
157 if (PL_op == (myop)) \
158 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
162 #define CALL_LIST_BODY(cv) \
163 PUSHMARK(PL_stack_sp); \
164 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
167 S_init_tls_and_interp(PerlInterpreter *my_perl)
171 PERL_SET_INTERP(my_perl);
172 #if defined(USE_ITHREADS)
175 PERL_SET_THX(my_perl);
178 MUTEX_INIT(&PL_dollarzero_mutex);
180 #ifdef PERL_IMPLICIT_CONTEXT
181 MUTEX_INIT(&PL_my_ctx_mutex);
184 #if defined(USE_ITHREADS)
187 /* This always happens for non-ithreads */
190 PERL_SET_THX(my_perl);
195 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
198 Perl_sys_init(int* argc, char*** argv)
202 PERL_ARGS_ASSERT_SYS_INIT;
204 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
205 PERL_UNUSED_ARG(argv);
206 PERL_SYS_INIT_BODY(argc, argv);
210 Perl_sys_init3(int* argc, char*** argv, char*** env)
214 PERL_ARGS_ASSERT_SYS_INIT3;
216 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
217 PERL_UNUSED_ARG(argv);
218 PERL_UNUSED_ARG(env);
219 PERL_SYS_INIT3_BODY(argc, argv, env);
226 if (!PL_veto_cleanup) {
227 PERL_SYS_TERM_BODY();
232 #ifdef PERL_IMPLICIT_SYS
234 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
235 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
236 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
237 struct IPerlDir* ipD, struct IPerlSock* ipS,
238 struct IPerlProc* ipP)
240 PerlInterpreter *my_perl;
242 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
244 /* Newx() needs interpreter, so call malloc() instead */
245 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
246 S_init_tls_and_interp(my_perl);
247 Zero(my_perl, 1, PerlInterpreter);
257 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
264 =head1 Embedding Functions
266 =for apidoc perl_alloc
268 Allocates a new Perl interpreter. See L<perlembed>.
276 PerlInterpreter *my_perl;
278 /* Newx() needs interpreter, so call malloc() instead */
279 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
281 S_init_tls_and_interp(my_perl);
282 #ifndef PERL_TRACK_MEMPOOL
283 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
285 Zero(my_perl, 1, PerlInterpreter);
286 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
290 #endif /* PERL_IMPLICIT_SYS */
293 =for apidoc perl_construct
295 Initializes a new Perl interpreter. See L<perlembed>.
301 perl_construct(pTHXx)
305 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
309 PL_perl_destruct_level = 1;
311 PERL_UNUSED_ARG(my_perl);
312 if (PL_perl_destruct_level > 0)
315 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
317 /* set read-only and try to insure than we wont see REFCNT==0
320 SvREADONLY_on(&PL_sv_undef);
321 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
323 sv_setpv(&PL_sv_no,PL_No);
324 /* value lookup in void context - happens to have the side effect
325 of caching the numeric forms. However, as &PL_sv_no doesn't contain
326 a string that is a valid numer, we have to turn the public flags by
332 SvREADONLY_on(&PL_sv_no);
333 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
335 sv_setpv(&PL_sv_yes,PL_Yes);
338 SvREADONLY_on(&PL_sv_yes);
339 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
341 SvREADONLY_on(&PL_sv_placeholder);
342 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
344 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
345 #ifdef PERL_USES_PL_PIDSTATUS
346 PL_pidstatus = newHV();
349 PL_rs = newSVpvs("\n");
359 SET_NUMERIC_STANDARD();
361 #if defined(LOCAL_PATCH_COUNT)
362 PL_localpatches = local_patches; /* For possible -v */
365 #ifdef HAVE_INTERP_INTERN
369 PerlIO_init(aTHX); /* Hook to IO system */
371 PL_fdpid = newAV(); /* for remembering popen pids by fd */
372 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
373 PL_errors = newSVpvs("");
374 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
375 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
376 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
378 /* First entry is a list of empty elements. It needs to be initialised
379 else all hell breaks loose in S_find_uninit_var(). */
380 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
381 PL_regex_pad = AvARRAY(PL_regex_padav);
383 #ifdef USE_REENTRANT_API
384 Perl_reentrant_init(aTHX);
387 /* Note that strtab is a rather special HV. Assumptions are made
388 about not iterating on it, and not adding tie magic to it.
389 It is properly deallocated in perl_destruct() */
392 HvSHAREKEYS_off(PL_strtab); /* mandatory */
393 hv_ksplit(PL_strtab, 512);
395 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
396 _dyld_lookup_and_bind
397 ("__environ", (unsigned long *) &environ_pointer, NULL);
401 # ifdef USE_ENVIRON_ARRAY
402 PL_origenviron = environ;
406 /* Use sysconf(_SC_CLK_TCK) if available, if not
407 * available or if the sysconf() fails, use the HZ.
408 * BeOS has those, but returns the wrong value.
409 * The HZ if not originally defined has been by now
410 * been defined as CLK_TCK, if available. */
411 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
412 PL_clocktick = sysconf(_SC_CLK_TCK);
413 if (PL_clocktick <= 0)
417 PL_stashcache = newHV();
419 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
420 (int)PERL_VERSION, (int)PERL_SUBVERSION);
423 if (!PL_mmap_page_size) {
424 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
426 SETERRNO(0, SS_NORMAL);
428 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
430 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
432 if ((long) PL_mmap_page_size < 0) {
434 SV * const error = ERRSV;
435 SvUPGRADE(error, SVt_PV);
436 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
439 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
443 # ifdef HAS_GETPAGESIZE
444 PL_mmap_page_size = getpagesize();
446 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
447 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
451 if (PL_mmap_page_size <= 0)
452 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
453 (IV) PL_mmap_page_size);
455 #endif /* HAS_MMAP */
457 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
458 PL_timesbase.tms_utime = 0;
459 PL_timesbase.tms_stime = 0;
460 PL_timesbase.tms_cutime = 0;
461 PL_timesbase.tms_cstime = 0;
464 PL_registered_mros = newHV();
465 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
466 HvMAX(PL_registered_mros) = 0;
472 =for apidoc nothreadhook
474 Stub that provides thread hook for perl_destruct when there are
481 Perl_nothreadhook(pTHX)
487 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
489 Perl_dump_sv_child(pTHX_ SV *sv)
492 const int sock = PL_dumper_fd;
493 const int debug_fd = PerlIO_fileno(Perl_debug_log);
494 union control_un control;
497 struct cmsghdr *cmptr;
499 unsigned char buffer[256];
501 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
503 if(sock == -1 || debug_fd == -1)
506 PerlIO_flush(Perl_debug_log);
508 /* All these shenanigans are to pass a file descriptor over to our child for
509 it to dump out to. We can't let it hold open the file descriptor when it
510 forks, as the file descriptor it will dump to can turn out to be one end
511 of pipe that some other process will wait on for EOF. (So as it would
512 be open, the wait would be forever.) */
514 msg.msg_control = control.control;
515 msg.msg_controllen = sizeof(control.control);
516 /* We're a connected socket so we don't need a destination */
522 cmptr = CMSG_FIRSTHDR(&msg);
523 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
524 cmptr->cmsg_level = SOL_SOCKET;
525 cmptr->cmsg_type = SCM_RIGHTS;
526 *((int *)CMSG_DATA(cmptr)) = 1;
528 vec[0].iov_base = (void*)&sv;
529 vec[0].iov_len = sizeof(sv);
530 got = sendmsg(sock, &msg, 0);
533 perror("Debug leaking scalars parent sendmsg failed");
536 if(got < sizeof(sv)) {
537 perror("Debug leaking scalars parent short sendmsg");
541 /* Return protocol is
543 unsigned char: length of location string (0 for empty)
544 unsigned char*: string (not terminated)
546 vec[0].iov_base = (void*)&returned_errno;
547 vec[0].iov_len = sizeof(returned_errno);
548 vec[1].iov_base = buffer;
551 got = readv(sock, vec, 2);
554 perror("Debug leaking scalars parent read failed");
555 PerlIO_flush(PerlIO_stderr());
558 if(got < sizeof(returned_errno) + 1) {
559 perror("Debug leaking scalars parent short read");
560 PerlIO_flush(PerlIO_stderr());
565 got = read(sock, buffer + 1, *buffer);
567 perror("Debug leaking scalars parent read 2 failed");
568 PerlIO_flush(PerlIO_stderr());
573 perror("Debug leaking scalars parent short read 2");
574 PerlIO_flush(PerlIO_stderr());
579 if (returned_errno || *buffer) {
580 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
581 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
582 returned_errno, strerror(returned_errno));
588 =for apidoc perl_destruct
590 Shuts down a Perl interpreter. See L<perlembed>.
599 VOL signed char destruct_level; /* see possible values in intrpvar.h */
601 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
605 PERL_ARGS_ASSERT_PERL_DESTRUCT;
607 PERL_UNUSED_ARG(my_perl);
610 /* wait for all pseudo-forked children to finish */
611 PERL_WAIT_FOR_CHILDREN;
613 destruct_level = PL_perl_destruct_level;
616 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
618 const int i = atoi(s);
619 if (destruct_level < i)
625 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
631 if (PL_endav && !PL_minus_c)
632 call_list(PL_scopestack_ix, PL_endav);
638 /* Need to flush since END blocks can produce output */
641 if (CALL_FPTR(PL_threadhook)(aTHX)) {
642 /* Threads hook has vetoed further cleanup */
643 PL_veto_cleanup = TRUE;
647 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
648 if (destruct_level != 0) {
649 /* Fork here to create a child. Our child's job is to preserve the
650 state of scalars prior to destruction, so that we can instruct it
651 to dump any scalars that we later find have leaked.
652 There's no subtlety in this code - it assumes POSIX, and it doesn't
656 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
657 perror("Debug leaking scalars socketpair failed");
663 perror("Debug leaking scalars fork failed");
667 /* We are the child */
668 const int sock = fd[1];
669 const int debug_fd = PerlIO_fileno(Perl_debug_log);
672 /* Our success message is an integer 0, and a char 0 */
673 static const char success[sizeof(int) + 1] = {0};
677 /* We need to close all other file descriptors otherwise we end up
678 with interesting hangs, where the parent closes its end of a
679 pipe, and sits waiting for (another) child to terminate. Only
680 that child never terminates, because it never gets EOF, because
681 we also have the far end of the pipe open. We even need to
682 close the debugging fd, because sometimes it happens to be one
683 end of a pipe, and a process is waiting on the other end for
684 EOF. Normally it would be closed at some point earlier in
685 destruction, but if we happen to cause the pipe to remain open,
686 EOF never occurs, and we get an infinite hang. Hence all the
687 games to pass in a file descriptor if it's actually needed. */
689 f = sysconf(_SC_OPEN_MAX);
691 where = "sysconf failed";
702 union control_un control;
705 struct cmsghdr *cmptr;
709 msg.msg_control = control.control;
710 msg.msg_controllen = sizeof(control.control);
711 /* We're a connected socket so we don't need a source */
715 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
717 vec[0].iov_base = (void*)⌖
718 vec[0].iov_len = sizeof(target);
720 got = recvmsg(sock, &msg, 0);
725 where = "recv failed";
728 if(got < sizeof(target)) {
729 where = "short recv";
733 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
737 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
738 where = "wrong cmsg_len";
741 if(cmptr->cmsg_level != SOL_SOCKET) {
742 where = "wrong cmsg_level";
745 if(cmptr->cmsg_type != SCM_RIGHTS) {
746 where = "wrong cmsg_type";
750 got_fd = *(int*)CMSG_DATA(cmptr);
751 /* For our last little bit of trickery, put the file descriptor
752 back into Perl_debug_log, as if we never actually closed it
754 if(got_fd != debug_fd) {
755 if (dup2(got_fd, debug_fd) == -1) {
762 PerlIO_flush(Perl_debug_log);
764 got = write(sock, &success, sizeof(success));
767 where = "write failed";
770 if(got < sizeof(success)) {
771 where = "short write";
778 int send_errno = errno;
779 unsigned char length = (unsigned char) strlen(where);
780 struct iovec failure[3] = {
781 {(void*)&send_errno, sizeof(send_errno)},
783 {(void*)where, length}
785 int got = writev(sock, failure, 3);
786 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
787 in the parent if we try to read from the socketpair after the
788 child has exited, even if there was data to read.
789 So sleep a bit to give the parent a fighting chance of
792 _exit((got == -1) ? errno : 0);
796 PL_dumper_fd = fd[0];
801 /* We must account for everything. */
803 /* Destroy the main CV and syntax tree */
804 /* Do this now, because destroying ops can cause new SVs to be generated
805 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
806 PL_curcop to point to a valid op from which the filename structure
808 PL_curcop = &PL_compiling;
810 /* ensure comppad/curpad to refer to main's pad */
811 if (CvPADLIST(PL_main_cv)) {
812 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
814 op_free(PL_main_root);
817 PL_main_start = NULL;
818 SvREFCNT_dec(PL_main_cv);
822 /* Tell PerlIO we are about to tear things apart in case
823 we have layers which are using resources that should
827 PerlIO_destruct(aTHX);
829 if (PL_sv_objcount) {
831 * Try to destruct global references. We do this first so that the
832 * destructors and destructees still exist. Some sv's might remain.
833 * Non-referenced objects are on their own.
837 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
838 PL_defoutgv = NULL; /* may have been freed */
841 /* unhook hooks which will soon be, or use, destroyed data */
842 SvREFCNT_dec(PL_warnhook);
844 SvREFCNT_dec(PL_diehook);
847 /* call exit list functions */
848 while (PL_exitlistlen-- > 0)
849 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
851 Safefree(PL_exitlist);
856 SvREFCNT_dec(PL_registered_mros);
858 /* jettison our possibly duplicated environment */
859 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
860 * so we certainly shouldn't free it here
863 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
864 if (environ != PL_origenviron && !PL_use_safe_putenv
866 /* only main thread can free environ[0] contents */
867 && PL_curinterp == aTHX
873 for (i = 0; environ[i]; i++)
874 safesysfree(environ[i]);
876 /* Must use safesysfree() when working with environ. */
877 safesysfree(environ);
879 environ = PL_origenviron;
882 #endif /* !PERL_MICRO */
884 if (destruct_level == 0) {
886 DEBUG_P(debprofdump());
888 #if defined(PERLIO_LAYERS)
889 /* No more IO - including error messages ! */
890 PerlIO_cleanup(aTHX);
893 CopFILE_free(&PL_compiling);
894 CopSTASH_free(&PL_compiling);
896 /* The exit() function will do everything that needs doing. */
900 /* reset so print() ends up where we expect */
904 /* the syntax tree is shared between clones
905 * so op_free(PL_main_root) only ReREFCNT_dec's
906 * REGEXPs in the parent interpreter
907 * we need to manually ReREFCNT_dec for the clones
909 SvREFCNT_dec(PL_regex_padav);
910 PL_regex_padav = NULL;
914 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
915 PL_stashcache = NULL;
917 /* loosen bonds of global variables */
919 /* XXX can PL_parser still be non-null here? */
920 if(PL_parser && PL_parser->rsfp) {
921 (void)PerlIO_close(PL_parser->rsfp);
922 PL_parser->rsfp = NULL;
926 Safefree(PL_splitstr);
936 PL_doswitches = FALSE;
937 PL_dowarn = G_WARN_OFF;
938 PL_doextract = FALSE;
939 PL_sawampersand = FALSE; /* must save all match strings */
942 Safefree(PL_inplace);
944 SvREFCNT_dec(PL_patchlevel);
947 SvREFCNT_dec(PL_e_script);
953 /* magical thingies */
955 SvREFCNT_dec(PL_ofsgv); /* *, */
958 SvREFCNT_dec(PL_ors_sv); /* $\ */
961 SvREFCNT_dec(PL_rs); /* $/ */
964 Safefree(PL_osname); /* $^O */
967 SvREFCNT_dec(PL_statname);
971 /* defgv, aka *_ should be taken care of elsewhere */
973 /* clean up after study() */
974 SvREFCNT_dec(PL_lastscream);
975 PL_lastscream = NULL;
976 Safefree(PL_screamfirst);
978 Safefree(PL_screamnext);
982 Safefree(PL_efloatbuf);
986 /* startup and shutdown function lists */
987 SvREFCNT_dec(PL_beginav);
988 SvREFCNT_dec(PL_beginav_save);
989 SvREFCNT_dec(PL_endav);
990 SvREFCNT_dec(PL_checkav);
991 SvREFCNT_dec(PL_checkav_save);
992 SvREFCNT_dec(PL_unitcheckav);
993 SvREFCNT_dec(PL_unitcheckav_save);
994 SvREFCNT_dec(PL_initav);
996 PL_beginav_save = NULL;
999 PL_checkav_save = NULL;
1000 PL_unitcheckav = NULL;
1001 PL_unitcheckav_save = NULL;
1004 /* shortcuts just get cleared */
1010 PL_argvoutgv = NULL;
1013 PL_last_in_gv = NULL;
1025 SvREFCNT_dec(PL_argvout_stack);
1026 PL_argvout_stack = NULL;
1028 SvREFCNT_dec(PL_modglobal);
1029 PL_modglobal = NULL;
1030 SvREFCNT_dec(PL_preambleav);
1031 PL_preambleav = NULL;
1032 SvREFCNT_dec(PL_subname);
1034 #ifdef PERL_USES_PL_PIDSTATUS
1035 SvREFCNT_dec(PL_pidstatus);
1036 PL_pidstatus = NULL;
1038 SvREFCNT_dec(PL_toptarget);
1039 PL_toptarget = NULL;
1040 SvREFCNT_dec(PL_bodytarget);
1041 PL_bodytarget = NULL;
1042 PL_formtarget = NULL;
1044 /* free locale stuff */
1045 #ifdef USE_LOCALE_COLLATE
1046 Safefree(PL_collation_name);
1047 PL_collation_name = NULL;
1050 #ifdef USE_LOCALE_NUMERIC
1051 Safefree(PL_numeric_name);
1052 PL_numeric_name = NULL;
1053 SvREFCNT_dec(PL_numeric_radix_sv);
1054 PL_numeric_radix_sv = NULL;
1057 /* clear utf8 character classes */
1058 SvREFCNT_dec(PL_utf8_alnum);
1059 SvREFCNT_dec(PL_utf8_alnumc);
1060 SvREFCNT_dec(PL_utf8_ascii);
1061 SvREFCNT_dec(PL_utf8_alpha);
1062 SvREFCNT_dec(PL_utf8_space);
1063 SvREFCNT_dec(PL_utf8_cntrl);
1064 SvREFCNT_dec(PL_utf8_graph);
1065 SvREFCNT_dec(PL_utf8_digit);
1066 SvREFCNT_dec(PL_utf8_upper);
1067 SvREFCNT_dec(PL_utf8_lower);
1068 SvREFCNT_dec(PL_utf8_print);
1069 SvREFCNT_dec(PL_utf8_punct);
1070 SvREFCNT_dec(PL_utf8_xdigit);
1071 SvREFCNT_dec(PL_utf8_mark);
1072 SvREFCNT_dec(PL_utf8_toupper);
1073 SvREFCNT_dec(PL_utf8_totitle);
1074 SvREFCNT_dec(PL_utf8_tolower);
1075 SvREFCNT_dec(PL_utf8_tofold);
1076 SvREFCNT_dec(PL_utf8_idstart);
1077 SvREFCNT_dec(PL_utf8_idcont);
1078 PL_utf8_alnum = NULL;
1079 PL_utf8_alnumc = NULL;
1080 PL_utf8_ascii = NULL;
1081 PL_utf8_alpha = NULL;
1082 PL_utf8_space = NULL;
1083 PL_utf8_cntrl = NULL;
1084 PL_utf8_graph = NULL;
1085 PL_utf8_digit = NULL;
1086 PL_utf8_upper = NULL;
1087 PL_utf8_lower = NULL;
1088 PL_utf8_print = NULL;
1089 PL_utf8_punct = NULL;
1090 PL_utf8_xdigit = NULL;
1091 PL_utf8_mark = NULL;
1092 PL_utf8_toupper = NULL;
1093 PL_utf8_totitle = NULL;
1094 PL_utf8_tolower = NULL;
1095 PL_utf8_tofold = NULL;
1096 PL_utf8_idstart = NULL;
1097 PL_utf8_idcont = NULL;
1099 if (!specialWARN(PL_compiling.cop_warnings))
1100 PerlMemShared_free(PL_compiling.cop_warnings);
1101 PL_compiling.cop_warnings = NULL;
1102 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1103 PL_compiling.cop_hints_hash = NULL;
1104 CopFILE_free(&PL_compiling);
1105 CopSTASH_free(&PL_compiling);
1107 /* Prepare to destruct main symbol table. */
1112 SvREFCNT_dec(PL_curstname);
1113 PL_curstname = NULL;
1115 /* clear queued errors */
1116 SvREFCNT_dec(PL_errors);
1119 SvREFCNT_dec(PL_isarev);
1122 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1123 if (PL_scopestack_ix != 0)
1124 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1125 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1126 (long)PL_scopestack_ix);
1127 if (PL_savestack_ix != 0)
1128 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1129 "Unbalanced saves: %ld more saves than restores\n",
1130 (long)PL_savestack_ix);
1131 if (PL_tmps_floor != -1)
1132 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1133 (long)PL_tmps_floor + 1);
1134 if (cxstack_ix != -1)
1135 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1136 (long)cxstack_ix + 1);
1139 /* Now absolutely destruct everything, somehow or other, loops or no. */
1141 /* the 2 is for PL_fdpid and PL_strtab */
1142 while (sv_clean_all() > 2)
1145 AvREAL_off(PL_fdpid); /* no surviving entries */
1146 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1149 #ifdef HAVE_INTERP_INTERN
1153 /* Destruct the global string table. */
1155 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1156 * so that sv_free() won't fail on them.
1157 * Now that the global string table is using a single hunk of memory
1158 * for both HE and HEK, we either need to explicitly unshare it the
1159 * correct way, or actually free things here.
1162 const I32 max = HvMAX(PL_strtab);
1163 HE * const * const array = HvARRAY(PL_strtab);
1164 HE *hent = array[0];
1167 if (hent && ckWARN_d(WARN_INTERNAL)) {
1168 HE * const next = HeNEXT(hent);
1169 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1170 "Unbalanced string table refcount: (%ld) for \"%s\"",
1171 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1178 hent = array[riter];
1183 HvARRAY(PL_strtab) = 0;
1184 HvTOTALKEYS(PL_strtab) = 0;
1185 HvFILL(PL_strtab) = 0;
1187 SvREFCNT_dec(PL_strtab);
1190 /* free the pointer tables used for cloning */
1191 ptr_table_free(PL_ptr_table);
1192 PL_ptr_table = (PTR_TBL_t*)NULL;
1195 /* free special SVs */
1197 SvREFCNT(&PL_sv_yes) = 0;
1198 sv_clear(&PL_sv_yes);
1199 SvANY(&PL_sv_yes) = NULL;
1200 SvFLAGS(&PL_sv_yes) = 0;
1202 SvREFCNT(&PL_sv_no) = 0;
1203 sv_clear(&PL_sv_no);
1204 SvANY(&PL_sv_no) = NULL;
1205 SvFLAGS(&PL_sv_no) = 0;
1209 for (i=0; i<=2; i++) {
1210 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1211 sv_clear(PERL_DEBUG_PAD(i));
1212 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1213 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1217 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1218 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1220 #ifdef DEBUG_LEAKING_SCALARS
1221 if (PL_sv_count != 0) {
1226 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1227 svend = &sva[SvREFCNT(sva)];
1228 for (sv = sva + 1; sv < svend; ++sv) {
1229 if (SvTYPE(sv) != SVTYPEMASK) {
1230 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1232 " refcnt=%"UVuf pTHX__FORMAT "\n"
1233 "\tallocated at %s:%d %s %s%s\n",
1234 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1236 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1238 sv->sv_debug_inpad ? "for" : "by",
1239 sv->sv_debug_optype ?
1240 PL_op_name[sv->sv_debug_optype]: "(none)",
1241 sv->sv_debug_cloned ? " (cloned)" : ""
1243 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1244 Perl_dump_sv_child(aTHX_ sv);
1250 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1254 /* Wait for up to 4 seconds for child to terminate.
1255 This seems to be the least effort way of timing out on reaping
1257 struct timeval waitfor = {4, 0};
1258 int sock = PL_dumper_fd;
1262 FD_SET(sock, &rset);
1263 select(sock + 1, &rset, NULL, NULL, &waitfor);
1264 waitpid(child, &status, WNOHANG);
1269 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1275 #ifdef PERL_DEBUG_READONLY_OPS
1281 #if defined(PERLIO_LAYERS)
1282 /* No more IO - including error messages ! */
1283 PerlIO_cleanup(aTHX);
1286 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1287 as currently layers use it rather than NULL as a marker
1288 for no arg - and will try and SvREFCNT_dec it.
1290 SvREFCNT(&PL_sv_undef) = 0;
1291 SvREADONLY_off(&PL_sv_undef);
1293 Safefree(PL_origfilename);
1294 PL_origfilename = NULL;
1295 Safefree(PL_reg_start_tmp);
1296 PL_reg_start_tmp = (char**)NULL;
1297 PL_reg_start_tmpl = 0;
1298 Safefree(PL_reg_curpm);
1299 Safefree(PL_reg_poscache);
1300 free_tied_hv_pool();
1301 Safefree(PL_op_mask);
1302 Safefree(PL_psig_ptr);
1303 PL_psig_ptr = (SV**)NULL;
1304 Safefree(PL_psig_name);
1305 PL_psig_name = (SV**)NULL;
1306 Safefree(PL_bitcount);
1308 Safefree(PL_psig_pend);
1309 PL_psig_pend = (int*)NULL;
1312 PL_tainting = FALSE;
1313 PL_taint_warn = FALSE;
1314 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1317 DEBUG_P(debprofdump());
1319 #ifdef USE_REENTRANT_API
1320 Perl_reentrant_free(aTHX);
1325 while (PL_regmatch_slab) {
1326 regmatch_slab *s = PL_regmatch_slab;
1327 PL_regmatch_slab = PL_regmatch_slab->next;
1331 /* As the absolutely last thing, free the non-arena SV for mess() */
1334 /* we know that type == SVt_PVMG */
1336 /* it could have accumulated taint magic */
1339 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1340 moremagic = mg->mg_moremagic;
1341 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1343 Safefree(mg->mg_ptr);
1347 /* we know that type >= SVt_PV */
1348 SvPV_free(PL_mess_sv);
1349 Safefree(SvANY(PL_mess_sv));
1350 Safefree(PL_mess_sv);
1357 =for apidoc perl_free
1359 Releases a Perl interpreter. See L<perlembed>.
1369 PERL_ARGS_ASSERT_PERL_FREE;
1371 if (PL_veto_cleanup)
1374 #ifdef PERL_TRACK_MEMPOOL
1377 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1378 * value as we're probably hunting memory leaks then
1380 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1381 if (!s || atoi(s) == 0) {
1382 const U32 old_debug = PL_debug;
1383 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1384 thread at thread exit. */
1386 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1387 "free this thread's memory\n");
1388 PL_debug &= ~ DEBUG_m_FLAG;
1390 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1391 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1392 PL_debug = old_debug;
1397 #if defined(WIN32) || defined(NETWARE)
1398 # if defined(PERL_IMPLICIT_SYS)
1401 void *host = nw_internal_host;
1403 void *host = w32_internal_host;
1405 PerlMem_free(aTHXx);
1407 nw_delete_internal_host(host);
1409 win32_delete_internal_host(host);
1413 PerlMem_free(aTHXx);
1416 PerlMem_free(aTHXx);
1420 #if defined(USE_ITHREADS)
1421 /* provide destructors to clean up the thread key when libperl is unloaded */
1422 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1424 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1425 #pragma fini "perl_fini"
1426 #elif defined(__sun) && !defined(__GNUC__)
1427 #pragma fini (perl_fini)
1431 #if defined(__GNUC__)
1432 __attribute__((destructor))
1437 if (PL_curinterp && !PL_veto_cleanup)
1442 #endif /* THREADS */
1445 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1448 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1449 PL_exitlist[PL_exitlistlen].fn = fn;
1450 PL_exitlist[PL_exitlistlen].ptr = ptr;
1454 #ifdef HAS_PROCSELFEXE
1455 /* This is a function so that we don't hold on to MAXPATHLEN
1456 bytes of stack longer than necessary
1459 S_procself_val(pTHX_ SV *sv, const char *arg0)
1461 char buf[MAXPATHLEN];
1462 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1464 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1465 includes a spurious NUL which will cause $^X to fail in system
1466 or backticks (this will prevent extensions from being built and
1467 many tests from working). readlink is not meant to add a NUL.
1468 Normal readlink works fine.
1470 if (len > 0 && buf[len-1] == '\0') {
1474 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1475 returning the text "unknown" from the readlink rather than the path
1476 to the executable (or returning an error from the readlink). Any valid
1477 path has a '/' in it somewhere, so use that to validate the result.
1478 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1480 if (len > 0 && memchr(buf, '/', len)) {
1481 sv_setpvn(sv,buf,len);
1487 #endif /* HAS_PROCSELFEXE */
1490 S_set_caret_X(pTHX) {
1492 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1494 #ifdef HAS_PROCSELFEXE
1495 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1498 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1500 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1507 =for apidoc perl_parse
1509 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1515 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1522 PERL_ARGS_ASSERT_PERL_PARSE;
1523 #ifndef MULTIPLICITY
1524 PERL_UNUSED_ARG(my_perl);
1527 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1528 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1529 "execute\nsetuid perl scripts securely.\n");
1532 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1533 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1534 * This MUST be done before any hash stores or fetches take place.
1535 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1536 * yourself, it is your responsibility to provide a good random seed!
1537 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1538 if (!PL_rehash_seed_set)
1539 PL_rehash_seed = get_hash_seed();
1541 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1543 if (s && (atoi(s) == 1))
1544 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1546 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1551 if (PL_origalen != 0) {
1552 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1555 /* Set PL_origalen be the sum of the contiguous argv[]
1556 * elements plus the size of the env in case that it is
1557 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1558 * as the maximum modifiable length of $0. In the worst case
1559 * the area we are able to modify is limited to the size of
1560 * the original argv[0]. (See below for 'contiguous', though.)
1562 const char *s = NULL;
1565 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1566 /* Do the mask check only if the args seem like aligned. */
1568 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1570 /* See if all the arguments are contiguous in memory. Note
1571 * that 'contiguous' is a loose term because some platforms
1572 * align the argv[] and the envp[]. If the arguments look
1573 * like non-aligned, assume that they are 'strictly' or
1574 * 'traditionally' contiguous. If the arguments look like
1575 * aligned, we just check that they are within aligned
1576 * PTRSIZE bytes. As long as no system has something bizarre
1577 * like the argv[] interleaved with some other data, we are
1578 * fine. (Did I just evoke Murphy's Law?) --jhi */
1579 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1581 for (i = 1; i < PL_origargc; i++) {
1582 if ((PL_origargv[i] == s + 1
1584 || PL_origargv[i] == s + 2
1589 (PL_origargv[i] > s &&
1591 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1602 #ifndef PERL_USE_SAFE_PUTENV
1603 /* Can we grab env area too to be used as the area for $0? */
1604 if (s && PL_origenviron && !PL_use_safe_putenv) {
1605 if ((PL_origenviron[0] == s + 1)
1608 (PL_origenviron[0] > s &&
1609 PL_origenviron[0] <=
1610 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1613 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1614 s = PL_origenviron[0];
1617 my_setenv("NoNe SuCh", NULL);
1618 /* Force copy of environment. */
1619 for (i = 1; PL_origenviron[i]; i++) {
1620 if (PL_origenviron[i] == s + 1
1623 (PL_origenviron[i] > s &&
1624 PL_origenviron[i] <=
1625 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1628 s = PL_origenviron[i];
1636 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1638 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1643 /* Come here if running an undumped a.out. */
1645 PL_origfilename = savepv(argv[0]);
1646 PL_do_undump = FALSE;
1647 cxstack_ix = -1; /* start label stack again */
1649 assert (!PL_tainted);
1651 S_set_caret_X(aTHX);
1653 init_postdump_symbols(argc,argv,env);
1658 op_free(PL_main_root);
1659 PL_main_root = NULL;
1661 PL_main_start = NULL;
1662 SvREFCNT_dec(PL_main_cv);
1666 oldscope = PL_scopestack_ix;
1667 PL_dowarn = G_WARN_OFF;
1672 parse_body(env,xsinit);
1674 call_list(oldscope, PL_unitcheckav);
1676 call_list(oldscope, PL_checkav);
1683 /* my_exit() was called */
1684 while (PL_scopestack_ix > oldscope)
1687 PL_curstash = PL_defstash;
1689 call_list(oldscope, PL_unitcheckav);
1691 call_list(oldscope, PL_checkav);
1695 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1704 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1708 int argc = PL_origargc;
1709 char **argv = PL_origargv;
1710 const char *scriptname = NULL;
1711 VOL bool dosearch = FALSE;
1713 const char *validarg = "";
1717 const char *cddir = NULL;
1718 #ifdef USE_SITECUSTOMIZE
1719 bool minus_f = FALSE;
1721 SV *linestr_sv = newSV_type(SVt_PVIV);
1722 bool add_read_e_script = FALSE;
1724 SvGROW(linestr_sv, 80);
1725 sv_setpvs(linestr_sv,"");
1727 sv = newSVpvs(""); /* first used for -I flags */
1733 for (argc--,argv++; argc > 0; argc--,argv++) {
1734 if (argv[0][0] != '-' || !argv[0][1])
1738 validarg = " PHOOEY ";
1742 * Can we rely on the kernel to start scripts with argv[1] set to
1743 * contain all #! line switches (the whole line)? (argv[0] is set to
1744 * the interpreter name, argv[2] to the script name; argv[3] and
1745 * above may contain other arguments.)
1752 #ifndef PERL_STRICT_CR
1776 if ((s = moreswitches(s)))
1781 CHECK_MALLOC_TOO_LATE_FOR('t');
1782 if( !PL_tainting ) {
1783 PL_taint_warn = TRUE;
1789 CHECK_MALLOC_TOO_LATE_FOR('T');
1791 PL_taint_warn = FALSE;
1799 #ifdef MACOS_TRADITIONAL
1800 /* ignore -e for Dev:Pseudo argument */
1801 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1804 forbid_setid('e', FALSE);
1806 PL_e_script = newSVpvs("");
1807 add_read_e_script = TRUE;
1810 sv_catpv(PL_e_script, s);
1812 sv_catpv(PL_e_script, argv[1]);
1816 Perl_croak(aTHX_ "No code specified for -%c", c);
1817 sv_catpvs(PL_e_script, "\n");
1821 #ifdef USE_SITECUSTOMIZE
1827 case 'I': /* -I handled both here and in moreswitches() */
1828 forbid_setid('I', FALSE);
1829 if (!*++s && (s=argv[1]) != NULL) {
1833 STRLEN len = strlen(s);
1834 const char * const p = savepvn(s, len);
1835 incpush(p, TRUE, TRUE, FALSE, FALSE, FALSE);
1836 sv_catpvs(sv, "-I");
1837 sv_catpvn(sv, p, len);
1842 Perl_croak(aTHX_ "No directory specified for -I");
1845 forbid_setid('S', FALSE);
1853 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1855 /* Can't do newSVpvs() as that would involve pre-processor
1856 condititionals inside a macro expansion. */
1857 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1864 # ifdef PERL_DONT_CREATE_GVSV
1865 " PERL_DONT_CREATE_GVSV"
1867 # ifdef PERL_MALLOC_WRAP
1870 # ifdef PERL_MEM_LOG
1873 # ifdef PERL_MEM_LOG_ENV
1876 # ifdef PERL_MEM_LOG_ENV_FD
1877 " PERL_MEM_LOG_ENV_FD"
1879 # ifdef PERL_MEM_LOG_STDERR
1880 " PERL_MEM_LOG_STDERR"
1882 # ifdef PERL_MEM_LOG_TIMESTAMP
1883 " PERL_MEM_LOG_TIMESTAMP"
1885 # ifdef PERL_USE_DEVEL
1888 # ifdef PERL_USE_SAFE_PUTENV
1889 " PERL_USE_SAFE_PUTENV"
1891 # ifdef USE_SITECUSTOMIZE
1892 " USE_SITECUSTOMIZE"
1894 # ifdef USE_FAST_STDIO
1899 sv_catpv(opts_prog, PL_bincompat_options);
1900 /* Terminate the qw(, and then wrap at 76 columns. */
1901 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1903 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1905 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1907 sv_catpvs(opts_prog," Source revision: " STRINGIFY(PERL_GIT_SHA1) "\\n");
1908 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1910 #if defined(LOCAL_PATCH_COUNT)
1911 if (LOCAL_PATCH_COUNT > 0) {
1913 sv_catpvs(opts_prog,
1914 "\" Locally applied patches:\\n\",");
1915 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1916 if (PL_localpatches[i])
1917 #ifdef X_PERL_PATCHNUM
1918 /* this is ifdef'ed out, we would enable this if we want to transform
1919 "DEVEL" registered patches into the git name */
1920 if (strEQ(PL_localpatches[i],"DEVEL"))
1921 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1922 0, STRINGIFY(PERL_PATCHNUM), 0);
1925 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1926 0, PL_localpatches[i], 0);
1930 Perl_sv_catpvf(aTHX_ opts_prog,
1931 "\" Built under %s\\n",OSNAME);
1934 sv_catpvs(opts_prog,
1935 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1937 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1940 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1941 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1942 "sort grep {/^PERL/} keys %ENV; ");
1944 sv_catpvs(opts_prog,
1945 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1947 sv_catpvs(opts_prog,
1948 "print \" \\%ENV:\\n @env\\n\" if @env;"
1949 "print \" \\@INC:\\n @INC\\n\";");
1953 opts_prog = Perl_newSVpvf(aTHX_
1954 "Config::config_vars(qw%c%s%c)",
1958 av_push(PL_preambleav, opts_prog);
1959 /* don't look for script or read stdin */
1960 scriptname = BIT_BUCKET;
1964 PL_doextract = TRUE;
1972 if (!*++s || isSPACE(*s)) {
1976 /* catch use of gnu style long options */
1977 if (strEQ(s, "version")) {
1981 if (strEQ(s, "help")) {
1988 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1999 #ifndef SECURE_INTERNAL_GETENV
2002 (s = PerlEnv_getenv("PERL5OPT")))
2006 if (*s == '-' && *(s+1) == 'T') {
2007 CHECK_MALLOC_TOO_LATE_FOR('T');
2009 PL_taint_warn = FALSE;
2012 char *popt_copy = NULL;
2025 if (!strchr("CDIMUdmtw", *s))
2026 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2030 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2031 s = popt_copy + (s - d);
2039 if( !PL_tainting ) {
2040 PL_taint_warn = TRUE;
2051 #ifdef USE_SITECUSTOMIZE
2053 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2054 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2059 scriptname = argv[0];
2062 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2064 else if (scriptname == NULL) {
2066 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2072 /* Set $^X early so that it can be used for relocatable paths in @INC */
2073 assert (!PL_tainted);
2075 S_set_caret_X(aTHX);
2080 bool suidscript = FALSE;
2083 const int fdscript =
2085 open_script(scriptname, dosearch, &suidscript, &rsfp);
2087 validate_suid(validarg, scriptname, fdscript, suidscript,
2091 # if defined(SIGCHLD) || defined(SIGCLD)
2094 # define SIGCHLD SIGCLD
2096 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2097 if (sigstate == (Sighandler_t) SIG_IGN) {
2098 if (ckWARN(WARN_SIGNAL))
2099 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2100 "Can't ignore signal CHLD, forcing to default");
2101 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2108 #ifdef MACOS_TRADITIONAL
2109 || gMacPerl_AlwaysExtract
2113 /* This will croak if suidscript is true, as -x cannot be used with
2115 forbid_setid('x', suidscript);
2116 /* Hence you can't get here if suidscript is true */
2118 find_beginning(linestr_sv, rsfp);
2119 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2120 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2124 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2125 CvUNIQUE_on(PL_compcv);
2127 CvPADLIST(PL_compcv) = pad_new(0);
2129 PL_isarev = newHV();
2132 boot_core_UNIVERSAL();
2133 boot_core_xsutils();
2137 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2139 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2145 # ifdef HAS_SOCKS5_INIT
2146 socks5_init(argv[0]);
2152 init_predump_symbols();
2153 /* init_postdump_symbols not currently designed to be called */
2154 /* more than once (ENV isn't cleared first, for example) */
2155 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2157 init_postdump_symbols(argc,argv,env);
2159 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2160 * or explicitly in some platforms.
2161 * locale.c:Perl_init_i18nl10n() if the environment
2162 * look like the user wants to use UTF-8. */
2163 #if defined(__SYMBIAN32__)
2164 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2167 /* Requires init_predump_symbols(). */
2168 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2173 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2174 * and the default open disciplines. */
2175 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2176 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2178 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2179 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2180 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2182 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2183 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2184 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2186 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2187 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2188 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2190 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2191 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2194 sv_setpvs(sv, ":utf8\0:utf8");
2196 sv_setpvs(sv, ":utf8\0");
2199 sv_setpvs(sv, "\0:utf8");
2207 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2208 if (strEQ(s, "unsafe"))
2209 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2210 else if (strEQ(s, "safe"))
2211 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2213 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2220 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2224 PL_xmlfp = PerlIO_stdout();
2226 PL_xmlfp = PerlIO_open(s, "w");
2228 Perl_croak(aTHX_ "Can't open %s", s);
2230 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2236 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2237 PL_madskills = atoi(s);
2238 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2243 lex_start(linestr_sv, rsfp, TRUE);
2244 PL_subname = newSVpvs("main");
2246 if (add_read_e_script)
2247 filter_add(read_e_script, NULL);
2249 /* now parse the script */
2251 SETERRNO(0,SS_NORMAL);
2252 #ifdef MACOS_TRADITIONAL
2253 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2255 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2257 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2258 MacPerl_MPWFileName(PL_origfilename));
2262 if (yyparse() || PL_parser->error_count) {
2264 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2266 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2271 CopLINE_set(PL_curcop, 0);
2272 PL_curstash = PL_defstash;
2274 SvREFCNT_dec(PL_e_script);
2282 SAVECOPFILE(PL_curcop);
2283 SAVECOPLINE(PL_curcop);
2284 gv_check(PL_defstash);
2293 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2294 dump_mstats("after compilation:");
2304 =for apidoc perl_run
2306 Tells a Perl interpreter to run. See L<perlembed>.
2319 PERL_ARGS_ASSERT_PERL_RUN;
2320 #ifndef MULTIPLICITY
2321 PERL_UNUSED_ARG(my_perl);
2324 oldscope = PL_scopestack_ix;
2332 cxstack_ix = -1; /* start context stack again */
2334 case 0: /* normal completion */
2338 case 2: /* my_exit() */
2339 while (PL_scopestack_ix > oldscope)
2342 PL_curstash = PL_defstash;
2343 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2344 PL_endav && !PL_minus_c)
2345 call_list(oldscope, PL_endav);
2347 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2348 dump_mstats("after execution: ");
2354 POPSTACK_TO(PL_mainstack);
2357 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2368 S_run_body(pTHX_ I32 oldscope)
2371 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2372 PL_sawampersand ? "Enabling" : "Omitting"));
2374 if (!PL_restartop) {
2378 exit(0); /* less likely to core dump than my_exit(0) */
2381 DEBUG_x(dump_all());
2384 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2388 #ifdef MACOS_TRADITIONAL
2389 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2390 (gMacPerl_ErrorFormat ? "# " : ""),
2391 MacPerl_MPWFileName(PL_origfilename));
2393 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2397 if (PERLDB_SINGLE && PL_DBsingle)
2398 sv_setiv(PL_DBsingle, 1);
2400 call_list(oldscope, PL_initav);
2401 #ifdef PERL_DEBUG_READONLY_OPS
2402 Perl_pending_Slabs_to_ro(aTHX);
2409 PL_op = PL_restartop;
2413 else if (PL_main_start) {
2414 CvDEPTH(PL_main_cv) = 1;
2415 PL_op = PL_main_start;
2423 =head1 SV Manipulation Functions
2425 =for apidoc p||get_sv
2427 Returns the SV of the specified Perl scalar. If C<create> is set and the
2428 Perl variable does not exist then it will be created. If C<create> is not
2429 set and the variable does not exist then NULL is returned.
2435 Perl_get_sv(pTHX_ const char *name, I32 create)
2439 PERL_ARGS_ASSERT_GET_SV;
2441 gv = gv_fetchpv(name, create, SVt_PV);
2448 =head1 Array Manipulation Functions
2450 =for apidoc p||get_av
2452 Returns the AV of the specified Perl array. If C<create> is set and the
2453 Perl variable does not exist then it will be created. If C<create> is not
2454 set and the variable does not exist then NULL is returned.
2460 Perl_get_av(pTHX_ const char *name, I32 create)
2462 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2464 PERL_ARGS_ASSERT_GET_AV;
2474 =head1 Hash Manipulation Functions
2476 =for apidoc p||get_hv
2478 Returns the HV of the specified Perl hash. If C<create> is set and the
2479 Perl variable does not exist then it will be created. If C<create> is not
2480 set and the variable does not exist then NULL is returned.
2486 Perl_get_hv(pTHX_ const char *name, I32 create)
2488 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2490 PERL_ARGS_ASSERT_GET_HV;
2500 =head1 CV Manipulation Functions
2502 =for apidoc p||get_cvn_flags
2504 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2505 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2506 exist then it will be declared (which has the same effect as saying
2507 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2508 then NULL is returned.
2510 =for apidoc p||get_cv
2512 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2518 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2520 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2521 /* XXX this is probably not what they think they're getting.
2522 * It has the same effect as "sub name;", i.e. just a forward
2525 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2527 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2528 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2529 return newSUB(start_subparse(FALSE, 0),
2530 newSVOP(OP_CONST, 0, sv),
2539 Perl_get_cv(pTHX_ const char *name, I32 flags)
2541 PERL_ARGS_ASSERT_GET_CV;
2543 return get_cvn_flags(name, strlen(name), flags);
2546 /* Be sure to refetch the stack pointer after calling these routines. */
2550 =head1 Callback Functions
2552 =for apidoc p||call_argv
2554 Performs a callback to the specified Perl sub. See L<perlcall>.
2560 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2562 /* See G_* flags in cop.h */
2563 /* null terminated arg list */
2568 PERL_ARGS_ASSERT_CALL_ARGV;
2573 mXPUSHs(newSVpv(*argv,0));
2578 return call_pv(sub_name, flags);
2582 =for apidoc p||call_pv
2584 Performs a callback to the specified Perl sub. See L<perlcall>.
2590 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2591 /* name of the subroutine */
2592 /* See G_* flags in cop.h */
2594 PERL_ARGS_ASSERT_CALL_PV;
2596 return call_sv(MUTABLE_SV(get_cv(sub_name, TRUE)), flags);
2600 =for apidoc p||call_method
2602 Performs a callback to the specified Perl method. The blessed object must
2603 be on the stack. See L<perlcall>.
2609 Perl_call_method(pTHX_ const char *methname, I32 flags)
2610 /* name of the subroutine */
2611 /* See G_* flags in cop.h */
2613 PERL_ARGS_ASSERT_CALL_METHOD;
2615 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2618 /* May be called with any of a CV, a GV, or an SV containing the name. */
2620 =for apidoc p||call_sv
2622 Performs a callback to the Perl sub whose name is in the SV. See
2629 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2630 /* See G_* flags in cop.h */
2633 LOGOP myop; /* fake syntax tree node */
2638 bool oldcatch = CATCH_GET;
2640 OP* const oldop = PL_op;
2643 PERL_ARGS_ASSERT_CALL_SV;
2645 if (flags & G_DISCARD) {
2649 if (!(flags & G_WANT)) {
2650 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2655 Zero(&myop, 1, LOGOP);
2656 myop.op_next = NULL;
2657 if (!(flags & G_NOARGS))
2658 myop.op_flags |= OPf_STACKED;
2659 myop.op_flags |= OP_GIMME_REVERSE(flags);
2663 EXTEND(PL_stack_sp, 1);
2664 *++PL_stack_sp = sv;
2666 oldscope = PL_scopestack_ix;
2668 if (PERLDB_SUB && PL_curstash != PL_debstash
2669 /* Handle first BEGIN of -d. */
2670 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2671 /* Try harder, since this may have been a sighandler, thus
2672 * curstash may be meaningless. */
2673 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2674 && !(flags & G_NODEBUG))
2675 PL_op->op_private |= OPpENTERSUB_DB;
2677 if (flags & G_METHOD) {
2678 Zero(&method_op, 1, UNOP);
2679 method_op.op_next = PL_op;
2680 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2681 method_op.op_type = OP_METHOD;
2682 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2683 myop.op_type = OP_ENTERSUB;
2684 PL_op = (OP*)&method_op;
2687 if (!(flags & G_EVAL)) {
2689 CALL_BODY_SUB((OP*)&myop);
2690 retval = PL_stack_sp - (PL_stack_base + oldmark);
2691 CATCH_SET(oldcatch);
2694 myop.op_other = (OP*)&myop;
2696 create_eval_scope(flags|G_FAKINGEVAL);
2704 CALL_BODY_SUB((OP*)&myop);
2705 retval = PL_stack_sp - (PL_stack_base + oldmark);
2706 if (!(flags & G_KEEPERR)) {
2714 /* my_exit() was called */
2715 PL_curstash = PL_defstash;
2718 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2719 Perl_croak(aTHX_ "Callback called exit");
2724 PL_op = PL_restartop;
2728 PL_stack_sp = PL_stack_base + oldmark;
2729 if ((flags & G_WANT) == G_ARRAY)
2733 *++PL_stack_sp = &PL_sv_undef;
2738 if (PL_scopestack_ix > oldscope)
2739 delete_eval_scope();
2743 if (flags & G_DISCARD) {
2744 PL_stack_sp = PL_stack_base + oldmark;
2753 /* Eval a string. The G_EVAL flag is always assumed. */
2756 =for apidoc p||eval_sv
2758 Tells Perl to C<eval> the string in the SV.
2764 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2766 /* See G_* flags in cop.h */
2770 UNOP myop; /* fake syntax tree node */
2771 VOL I32 oldmark = SP - PL_stack_base;
2774 OP* const oldop = PL_op;
2777 PERL_ARGS_ASSERT_EVAL_SV;
2779 if (flags & G_DISCARD) {
2786 Zero(PL_op, 1, UNOP);
2787 EXTEND(PL_stack_sp, 1);
2788 *++PL_stack_sp = sv;
2790 if (!(flags & G_NOARGS))
2791 myop.op_flags = OPf_STACKED;
2792 myop.op_next = NULL;
2793 myop.op_type = OP_ENTEREVAL;
2794 myop.op_flags |= OP_GIMME_REVERSE(flags);
2795 if (flags & G_KEEPERR)
2796 myop.op_flags |= OPf_SPECIAL;
2798 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2799 * before a PUSHEVAL, which corrupts the stack after a croak */
2800 TAINT_PROPER("eval_sv()");
2806 CALL_BODY_EVAL((OP*)&myop);
2807 retval = PL_stack_sp - (PL_stack_base + oldmark);
2808 if (!(flags & G_KEEPERR)) {
2816 /* my_exit() was called */
2817 PL_curstash = PL_defstash;
2820 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2821 Perl_croak(aTHX_ "Callback called exit");
2826 PL_op = PL_restartop;
2830 PL_stack_sp = PL_stack_base + oldmark;
2831 if ((flags & G_WANT) == G_ARRAY)
2835 *++PL_stack_sp = &PL_sv_undef;
2841 if (flags & G_DISCARD) {
2842 PL_stack_sp = PL_stack_base + oldmark;
2852 =for apidoc p||eval_pv
2854 Tells Perl to C<eval> the given string and return an SV* result.
2860 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2864 SV* sv = newSVpv(p, 0);
2866 PERL_ARGS_ASSERT_EVAL_PV;
2868 eval_sv(sv, G_SCALAR);
2875 if (croak_on_error && SvTRUE(ERRSV)) {
2876 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2882 /* Require a module. */
2885 =head1 Embedding Functions
2887 =for apidoc p||require_pv
2889 Tells Perl to C<require> the file named by the string argument. It is
2890 analogous to the Perl code C<eval "require '$file'">. It's even
2891 implemented that way; consider using load_module instead.
2896 Perl_require_pv(pTHX_ const char *pv)
2902 PERL_ARGS_ASSERT_REQUIRE_PV;
2904 PUSHSTACKi(PERLSI_REQUIRE);
2906 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2907 eval_sv(sv_2mortal(sv), G_DISCARD);
2913 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2915 /* This message really ought to be max 23 lines.
2916 * Removed -h because the user already knows that option. Others? */
2918 static const char * const usage_msg[] = {
2919 "-0[octal] specify record separator (\\0, if no argument)",
2920 "-a autosplit mode with -n or -p (splits $_ into @F)",
2921 "-C[number/list] enables the listed Unicode features",
2922 "-c check syntax only (runs BEGIN and CHECK blocks)",
2923 "-d[:debugger] run program under debugger",
2924 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2925 "-e program one line of program (several -e's allowed, omit programfile)",
2926 "-E program like -e, but enables all optional features",
2927 "-f don't do $sitelib/sitecustomize.pl at startup",
2928 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2929 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2930 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2931 "-l[octal] enable line ending processing, specifies line terminator",
2932 "-[mM][-]module execute \"use/no module...\" before executing program",
2933 "-n assume \"while (<>) { ... }\" loop around program",
2934 "-p assume loop like -n but print line also, like sed",
2935 "-s enable rudimentary parsing for switches after programfile",
2936 "-S look for programfile using PATH environment variable",
2937 "-t enable tainting warnings",
2938 "-T enable tainting checks",
2939 "-u dump core after parsing program",
2940 "-U allow unsafe operations",
2941 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2942 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2943 "-w enable many useful warnings (RECOMMENDED)",
2944 "-W enable all warnings",
2945 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2946 "-X disable all warnings",
2950 const char * const *p = usage_msg;
2952 PERL_ARGS_ASSERT_USAGE;
2954 PerlIO_printf(PerlIO_stdout(),
2955 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2958 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2961 /* convert a string of -D options (or digits) into an int.
2962 * sets *s to point to the char after the options */
2966 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2968 static const char * const usage_msgd[] = {
2969 " Debugging flag values: (see also -d)",
2970 " p Tokenizing and parsing (with v, displays parse stack)",
2971 " s Stack snapshots (with v, displays all stacks)",
2972 " l Context (loop) stack processing",
2973 " t Trace execution",
2974 " o Method and overloading resolution",
2975 " c String/numeric conversions",
2976 " P Print profiling info, source file input state",
2977 " m Memory and SV allocation",
2978 " f Format processing",
2979 " r Regular expression parsing and execution",
2980 " x Syntax tree dump",
2981 " u Tainting checks",
2982 " H Hash dump -- usurps values()",
2983 " X Scratchpad allocation",
2986 " R Include reference counts of dumped variables (eg when using -Ds)",
2987 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2988 " v Verbose: use in conjunction with other flags",
2990 " A Consistency checks on internal structures",
2991 " q quiet - currently only suppresses the 'EXECUTING' message",
2996 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2999 /* if adding extra options, remember to update DEBUG_MASK */
3000 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
3002 for (; isALNUM(**s); (*s)++) {
3003 const char * const d = strchr(debopts,**s);
3005 i |= 1 << (d - debopts);
3006 else if (ckWARN_d(WARN_DEBUGGING))
3007 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3008 "invalid option -D%c, use -D'' to see choices\n", **s);
3011 else if (isDIGIT(**s)) {
3013 for (; isALNUM(**s); (*s)++) ;
3015 else if (givehelp) {
3016 const char *const *p = usage_msgd;
3017 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3020 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3021 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3022 "-Dp not implemented on this platform\n");
3028 /* This routine handles any switches that can be given during run */
3031 Perl_moreswitches(pTHX_ const char *s)
3035 const char option = *s; /* used to remember option in -m/-M code */
3037 PERL_ARGS_ASSERT_MORESWITCHES;
3045 SvREFCNT_dec(PL_rs);
3046 if (s[1] == 'x' && s[2]) {
3047 const char *e = s+=2;
3053 flags = PERL_SCAN_SILENT_ILLDIGIT;
3054 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3055 if (s + numlen < e) {
3056 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3060 PL_rs = newSVpvs("");
3061 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3062 tmps = (U8*)SvPVX(PL_rs);
3063 uvchr_to_utf8(tmps, rschar);
3064 SvCUR_set(PL_rs, UNISKIP(rschar));
3069 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3070 if (rschar & ~((U8)~0))
3071 PL_rs = &PL_sv_undef;
3072 else if (!rschar && numlen >= 2)
3073 PL_rs = newSVpvs("");
3075 char ch = (char)rschar;
3076 PL_rs = newSVpvn(&ch, 1);
3079 sv_setsv(get_sv("/", TRUE), PL_rs);
3084 PL_unicode = parse_unicode_opts( (const char **)&s );
3085 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3091 while (*s && !isSPACE(*s)) ++s;
3092 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3103 forbid_setid('d', FALSE);
3106 /* -dt indicates to the debugger that threads will be used */
3107 if (*s == 't' && !isALNUM(s[1])) {
3109 my_setenv("PERL5DB_THREADED", "1");
3112 /* The following permits -d:Mod to accepts arguments following an =
3113 in the fashion that -MSome::Mod does. */
3114 if (*s == ':' || *s == '=') {
3115 const char *start = ++s;
3116 const char *const end = s + strlen(s);
3117 SV * const sv = newSVpvs("use Devel::");
3119 /* We now allow -d:Module=Foo,Bar */
3120 while(isALNUM(*s) || *s==':') ++s;
3122 sv_catpvn(sv, start, end - start);
3124 sv_catpvn(sv, start, s-start);
3125 /* Don't use NUL as q// delimiter here, this string goes in the
3127 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3130 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3134 PL_perldb = PERLDB_ALL;
3141 forbid_setid('D', FALSE);
3143 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3144 #else /* !DEBUGGING */
3145 if (ckWARN_d(WARN_DEBUGGING))
3146 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3147 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3148 for (s++; isALNUM(*s); s++) ;
3153 usage(PL_origargv[0]);
3156 Safefree(PL_inplace);
3157 #if defined(__CYGWIN__) /* do backup extension automagically */
3158 if (*(s+1) == '\0') {
3159 PL_inplace = savepvs(".bak");
3162 #endif /* __CYGWIN__ */
3164 const char * const start = ++s;
3165 while (*s && !isSPACE(*s))
3168 PL_inplace = savepvn(start, s - start);
3172 if (*s == '-') /* Additional switches on #! line. */
3176 case 'I': /* -I handled both here and in parse_body() */
3177 forbid_setid('I', FALSE);
3179 while (*s && isSPACE(*s))
3184 /* ignore trailing spaces (possibly followed by other switches) */
3186 for (e = p; *e && !isSPACE(*e); e++) ;
3190 } while (*p && *p != '-');
3191 e = savepvn(s, e-s);
3192 incpush(e, TRUE, TRUE, FALSE, FALSE, TRUE);
3199 Perl_croak(aTHX_ "No directory specified for -I");
3205 SvREFCNT_dec(PL_ors_sv);
3211 PL_ors_sv = newSVpvs("\n");
3212 numlen = 3 + (*s == '0');
3213 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3217 if (RsPARA(PL_rs)) {
3218 PL_ors_sv = newSVpvs("\n\n");
3221 PL_ors_sv = newSVsv(PL_rs);
3226 forbid_setid('M', FALSE); /* XXX ? */
3229 forbid_setid('m', FALSE); /* XXX ? */
3234 const char *use = "use ";
3236 /* -M-foo == 'no foo' */
3237 /* Leading space on " no " is deliberate, to make both
3238 possibilities the same length. */
3239 if (*s == '-') { use = " no "; ++s; }
3240 sv = newSVpvn(use,4);
3242 /* We allow -M'Module qw(Foo Bar)' */
3243 while(isALNUM(*s) || *s==':') {
3252 Perl_croak(aTHX_ "Module name required with -%c option",
3255 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3256 "contains single ':'",
3257 (int)(s - start), start, option);
3258 end = s + strlen(s);
3260 sv_catpvn(sv, start, end - start);
3261 if (option == 'm') {
3263 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3264 sv_catpvs( sv, " ()");
3267 sv_catpvn(sv, start, s-start);
3268 /* Use NUL as q''-delimiter. */
3269 sv_catpvs(sv, " split(/,/,q\0");
3271 sv_catpvn(sv, s, end - s);
3272 sv_catpvs(sv, "\0)");
3275 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3278 Perl_croak(aTHX_ "Missing argument to -%c", option);
3289 forbid_setid('s', FALSE);
3290 PL_doswitches = TRUE;
3304 #ifdef MACOS_TRADITIONAL
3305 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3307 PL_do_undump = TRUE;
3315 if (!sv_derived_from(PL_patchlevel, "version"))
3316 upg_version(PL_patchlevel, TRUE);
3318 PerlIO_printf(PerlIO_stdout(),
3319 "\nThis is perl, %"SVf
3321 SVfARG(vstringify(PL_patchlevel)),
3324 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3325 PerlIO_printf(PerlIO_stdout(),
3326 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3327 SVfARG(vstringify(PL_patchlevel))));
3328 PerlIO_printf(PerlIO_stdout(),
3329 Perl_form(aTHX_ " built under %s at %s %s\n",
3330 OSNAME, __DATE__, __TIME__));
3331 PerlIO_printf(PerlIO_stdout(),
3332 Perl_form(aTHX_ " OS Specific Release: %s\n",
3335 #if defined PERL_PATCHNUM
3336 PerlIO_printf(PerlIO_stdout(),"\nCompiled from: %s",STRINGIFY(PERL_PATCHNUM));
3338 #if defined(LOCAL_PATCH_COUNT)
3339 if (LOCAL_PATCH_COUNT > 0)
3340 PerlIO_printf(PerlIO_stdout(),
3341 "\n(with %d registered patch%s, "
3342 "see perl -V for more detail)",
3344 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "\n\nCopyright 1987-2008, Larry Wall\n");
3349 #ifdef MACOS_TRADITIONAL
3350 PerlIO_printf(PerlIO_stdout(),
3351 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3352 "maintained by Chris Nandor\n");
3355 PerlIO_printf(PerlIO_stdout(),
3356 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3359 PerlIO_printf(PerlIO_stdout(),
3360 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3361 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3366 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3369 PerlIO_printf(PerlIO_stdout(),
3370 "atariST series port, ++jrb bammi@cadence.com\n");
3373 PerlIO_printf(PerlIO_stdout(),
3374 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3377 PerlIO_printf(PerlIO_stdout(),
3378 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3381 PerlIO_printf(PerlIO_stdout(),
3382 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3385 PerlIO_printf(PerlIO_stdout(),
3386 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3389 PerlIO_printf(PerlIO_stdout(),
3390 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3393 PerlIO_printf(PerlIO_stdout(),
3394 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3397 PerlIO_printf(PerlIO_stdout(),
3398 "MiNT port by Guido Flohr, 1997-1999\n");
3401 PerlIO_printf(PerlIO_stdout(),
3402 "EPOC port by Olaf Flebbe, 1999-2002\n");
3405 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3406 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3409 #ifdef __SYMBIAN32__
3410 PerlIO_printf(PerlIO_stdout(),
3411 "Symbian port by Nokia, 2004-2005\n");
3413 #ifdef BINARY_BUILD_NOTICE
3414 BINARY_BUILD_NOTICE;
3416 PerlIO_printf(PerlIO_stdout(),
3418 Perl may be copied only under the terms of either the Artistic License or the\n\
3419 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3420 Complete documentation for Perl, including FAQ lists, should be found on\n\
3421 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3422 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3425 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3426 PL_dowarn |= G_WARN_ON;
3431 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3432 if (!specialWARN(PL_compiling.cop_warnings))
3433 PerlMemShared_free(PL_compiling.cop_warnings);
3434 PL_compiling.cop_warnings = pWARN_ALL ;
3438 PL_dowarn = G_WARN_ALL_OFF;
3439 if (!specialWARN(PL_compiling.cop_warnings))
3440 PerlMemShared_free(PL_compiling.cop_warnings);
3441 PL_compiling.cop_warnings = pWARN_NONE ;
3448 if (s[0] == '-') /* Additional switches on #! line. */
3453 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3459 #ifdef ALTERNATE_SHEBANG
3460 case 'S': /* OS/2 needs -S on "extproc" line. */
3464 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3469 /* compliments of Tom Christiansen */
3471 /* unexec() can be found in the Gnu emacs distribution */
3472 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3475 Perl_my_unexec(pTHX)
3477 PERL_UNUSED_CONTEXT;
3479 SV * prog = newSVpv(BIN_EXP, 0);
3480 SV * file = newSVpv(PL_origfilename, 0);
3484 sv_catpvs(prog, "/perl");
3485 sv_catpvs(file, ".perldump");
3487 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3488 /* unexec prints msg to stderr in case of failure */
3489 PerlProc_exit(status);
3492 # include <lib$routines.h>
3493 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3494 # elif defined(WIN32) || defined(__CYGWIN__)
3495 Perl_croak(aTHX_ "dump is not supported");
3497 ABORT(); /* for use with undump */
3502 /* initialize curinterp */
3508 # define PERLVAR(var,type)
3509 # define PERLVARA(var,n,type)
3510 # if defined(PERL_IMPLICIT_CONTEXT)
3511 # define PERLVARI(var,type,init) aTHX->var = init;
3512 # define PERLVARIC(var,type,init) aTHX->var = init;
3514 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3515 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3517 # include "intrpvar.h"
3523 # define PERLVAR(var,type)
3524 # define PERLVARA(var,n,type)
3525 # define PERLVARI(var,type,init) PL_##var = init;
3526 # define PERLVARIC(var,type,init) PL_##var = init;
3527 # include "intrpvar.h"
3534 /* As these are inside a structure, PERLVARI isn't capable of initialising
3536 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3537 PL_reg_poscache = PL_reg_starttry = NULL;
3541 S_init_main_stash(pTHX)
3546 PL_curstash = PL_defstash = newHV();
3547 /* We know that the string "main" will be in the global shared string
3548 table, so it's a small saving to use it rather than allocate another
3550 PL_curstname = newSVpvs_share("main");
3551 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3552 /* If we hadn't caused another reference to "main" to be in the shared
3553 string table above, then it would be worth reordering these two,
3554 because otherwise all we do is delete "main" from it as a consequence
3555 of the SvREFCNT_dec, only to add it again with hv_name_set */
3556 SvREFCNT_dec(GvHV(gv));
3557 hv_name_set(PL_defstash, "main", 4, 0);
3558 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3560 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3562 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3563 GvMULTI_on(PL_incgv);
3564 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3565 GvMULTI_on(PL_hintgv);
3566 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3567 SvREFCNT_inc_simple_void(PL_defgv);
3568 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3569 SvREFCNT_inc_simple_void(PL_errgv);
3570 GvMULTI_on(PL_errgv);
3571 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3572 GvMULTI_on(PL_replgv);
3573 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3574 #ifdef PERL_DONT_CREATE_GVSV
3577 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3579 PL_curstash = PL_defstash;
3580 CopSTASH_set(&PL_compiling, PL_defstash);
3581 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3582 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3584 /* We must init $/ before switches are processed. */
3585 sv_setpvs(get_sv("/", TRUE), "\n");
3589 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3590 bool *suidscript, PerlIO **rsfpp)
3595 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3598 PL_origfilename = savepvs("-e");
3601 /* if find_script() returns, it returns a malloc()-ed value */
3602 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3604 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3605 const char *s = scriptname + 8;
3611 * Tell apart "normal" usage of fdscript, e.g.
3612 * with bash on FreeBSD:
3613 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3614 * from usage in suidperl.
3615 * Does any "normal" usage leave garbage after the number???
3616 * Is it a mistake to use a similar /dev/fd/ construct for
3621 * Be supersafe and do some sanity-checks.
3622 * Still, can we be sure we got the right thing?
3625 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3628 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3630 scriptname = savepv(s + 1);
3631 Safefree(PL_origfilename);
3632 PL_origfilename = (char *)scriptname;
3637 CopFILE_free(PL_curcop);
3638 CopFILE_set(PL_curcop, PL_origfilename);
3639 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3640 scriptname = (char *)"";
3641 if (fdscript >= 0) {
3642 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3643 # if defined(HAS_FCNTL) && defined(F_SETFD)
3645 /* ensure close-on-exec */
3646 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3651 Perl_croak(aTHX_ "sperl needs fd script\n"
3652 "You should not call sperl directly; do you need to "
3653 "change a #! line\nfrom sperl to perl?\n");
3656 * Do not open (or do other fancy stuff) while setuid.
3657 * Perl does the open, and hands script to suidperl on a fd;
3658 * suidperl only does some checks, sets up UIDs and re-execs
3659 * perl with that fd as it has always done.
3663 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3666 else if (!*scriptname) {
3667 forbid_setid(0, *suidscript);
3668 *rsfpp = PerlIO_stdin();
3671 #ifdef FAKE_BIT_BUCKET
3672 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3673 * is called) and still have the "-e" work. (Believe it or not,
3674 * a /dev/null is required for the "-e" to work because source
3675 * filter magic is used to implement it. ) This is *not* a general
3676 * replacement for a /dev/null. What we do here is create a temp
3677 * file (an empty file), open up that as the script, and then
3678 * immediately close and unlink it. Close enough for jazz. */
3679 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3680 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3681 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3682 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3683 FAKE_BIT_BUCKET_TEMPLATE
3685 const char * const err = "Failed to create a fake bit bucket";
3686 if (strEQ(scriptname, BIT_BUCKET)) {
3687 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3688 int tmpfd = mkstemp(tmpname);
3690 scriptname = tmpname;
3693 Perl_croak(aTHX_ err);
3696 scriptname = mktemp(tmpname);
3698 Perl_croak(aTHX_ err);
3703 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3704 #ifdef FAKE_BIT_BUCKET
3705 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3706 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3707 && strlen(scriptname) == sizeof(tmpname) - 1) {
3710 scriptname = BIT_BUCKET;
3712 # if defined(HAS_FCNTL) && defined(F_SETFD)
3714 /* ensure close-on-exec */
3715 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3718 #endif /* IAMSUID */
3720 /* PSz 16 Sep 03 Keep neat error message */
3722 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3724 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3725 CopFILE(PL_curcop), Strerror(errno));
3731 * I_SYSSTATVFS HAS_FSTATVFS
3733 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3734 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3735 * here so that metaconfig picks them up. */
3739 S_fd_on_nosuid_fs(pTHX_ int fd)
3742 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3743 * but is needed also on machines without setreuid.
3744 * Seems safe enough to run as root.
3746 int check_okay = 0; /* able to do all the required sys/libcalls */
3747 int on_nosuid = 0; /* the fd is on a nosuid fs */
3749 * Need to check noexec also: nosuid might not be set, the average
3750 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3752 int on_noexec = 0; /* the fd is on a noexec fs */
3755 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3756 * fstatvfs() is UNIX98.
3757 * fstatfs() is 4.3 BSD.
3758 * ustat()+getmnt() is pre-4.3 BSD.
3759 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3760 * an irrelevant filesystem while trying to reach the right one.
3763 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3765 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3766 defined(HAS_FSTATVFS)
3767 # define FD_ON_NOSUID_CHECK_OKAY
3768 struct statvfs stfs;
3770 check_okay = fstatvfs(fd, &stfs) == 0;
3771 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3773 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3774 on platforms where it is present. */
3775 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3777 # endif /* fstatvfs */
3779 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3780 defined(PERL_MOUNT_NOSUID) && \
3781 defined(PERL_MOUNT_NOEXEC) && \
3782 defined(HAS_FSTATFS) && \
3783 defined(HAS_STRUCT_STATFS) && \
3784 defined(HAS_STRUCT_STATFS_F_FLAGS)
3785 # define FD_ON_NOSUID_CHECK_OKAY
3788 check_okay = fstatfs(fd, &stfs) == 0;
3789 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3790 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3791 # endif /* fstatfs */
3793 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3794 defined(PERL_MOUNT_NOSUID) && \
3795 defined(PERL_MOUNT_NOEXEC) && \
3796 defined(HAS_FSTAT) && \
3797 defined(HAS_USTAT) && \
3798 defined(HAS_GETMNT) && \
3799 defined(HAS_STRUCT_FS_DATA) && \
3801 # define FD_ON_NOSUID_CHECK_OKAY
3804 if (fstat(fd, &fdst) == 0) {
3806 if (ustat(fdst.st_dev, &us) == 0) {
3808 /* NOSTAT_ONE here because we're not examining fields which
3809 * vary between that case and STAT_ONE. */
3810 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3811 size_t cmplen = sizeof(us.f_fname);
3812 if (sizeof(fsd.fd_req.path) < cmplen)
3813 cmplen = sizeof(fsd.fd_req.path);
3814 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3815 fdst.st_dev == fsd.fd_req.dev) {
3817 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3818 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3823 # endif /* fstat+ustat+getmnt */
3825 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3826 defined(HAS_GETMNTENT) && \
3827 defined(HAS_HASMNTOPT) && \
3828 defined(MNTOPT_NOSUID) && \
3829 defined(MNTOPT_NOEXEC)
3830 # define FD_ON_NOSUID_CHECK_OKAY
3831 FILE *mtab = fopen("/etc/mtab", "r");
3832 struct mntent *entry;
3835 if (mtab && (fstat(fd, &stb) == 0)) {
3836 while (entry = getmntent(mtab)) {
3837 if (stat(entry->mnt_dir, &fsb) == 0
3838 && fsb.st_dev == stb.st_dev)
3840 /* found the filesystem */
3842 if (hasmntopt(entry, MNTOPT_NOSUID))
3844 if (hasmntopt(entry, MNTOPT_NOEXEC))
3847 } /* A single fs may well fail its stat(). */
3852 # endif /* getmntent+hasmntopt */
3855 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3857 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3859 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3860 return ((!check_okay) || on_nosuid || on_noexec);
3862 #endif /* IAMSUID */
3866 S_validate_suid(pTHX_ const char *validarg,
3868 const char *scriptname,
3874 SV *linestr_sv, PerlIO *rsfp)
3879 PERL_ARGS_ASSERT_VALIDATE_SUID;
3881 /* do we need to emulate setuid on scripts? */
3883 /* This code is for those BSD systems that have setuid #! scripts disabled
3884 * in the kernel because of a security problem. Merely defining DOSUID
3885 * in perl will not fix that problem, but if you have disabled setuid
3886 * scripts in the kernel, this will attempt to emulate setuid and setgid
3887 * on scripts that have those now-otherwise-useless bits set. The setuid
3888 * root version must be called suidperl or sperlN.NNN. If regular perl
3889 * discovers that it has opened a setuid script, it calls suidperl with
3890 * the same argv that it had. If suidperl finds that the script it has
3891 * just opened is NOT setuid root, it sets the effective uid back to the
3892 * uid. We don't just make perl setuid root because that loses the
3893 * effective uid we had before invoking perl, if it was different from the
3896 * Description/comments above do not match current workings:
3897 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3898 * suidperl called with script open and name changed to /dev/fd/N/X;
3899 * suidperl croaks if script is not setuid;
3900 * making perl setuid would be a huge security risk (and yes, that
3901 * would lose any euid we might have had).
3903 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3904 * be defined in suidperl only. suidperl must be setuid root. The
3905 * Configure script will set this up for you if you want it.
3908 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3909 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3910 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3912 const char *linestr;
3916 if (fdscript < 0 || !suidscript)
3917 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3919 * Since the script is opened by perl, not suidperl, some of these
3920 * checks are superfluous. Leaving them in probably does not lower
3924 * Do checks even for systems with no HAS_SETREUID.
3925 * We used to swap, then re-swap UIDs with
3926 # ifdef HAS_SETREUID
3927 if (setreuid(PL_euid,PL_uid) < 0
3928 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3929 Perl_croak(aTHX_ "Can't swap uid and euid");
3931 # ifdef HAS_SETREUID
3932 if (setreuid(PL_uid,PL_euid) < 0
3933 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3934 Perl_croak(aTHX_ "Can't reswap uid and euid");
3938 /* On this access check to make sure the directories are readable,
3939 * there is actually a small window that the user could use to make
3940 * filename point to an accessible directory. So there is a faint
3941 * chance that someone could execute a setuid script down in a
3942 * non-accessible directory. I don't know what to do about that.
3943 * But I don't think it's too important. The manual lies when
3944 * it says access() is useful in setuid programs.
3946 * So, access() is pretty useless... but not harmful... do anyway.
3948 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3949 Perl_croak(aTHX_ "Can't access() script\n");
3952 /* If we can swap euid and uid, then we can determine access rights
3953 * with a simple stat of the file, and then compare device and
3954 * inode to make sure we did stat() on the same file we opened.
3955 * Then we just have to make sure he or she can execute it.
3958 * As the script is opened by perl, not suidperl, we do not need to
3959 * care much about access rights.
3961 * The 'script changed' check is needed, or we can get lied to
3962 * about $0 with e.g.
3963 * suidperl /dev/fd/4//bin/x 4<setuidscript
3964 * Without HAS_SETREUID, is it safe to stat() as root?
3966 * Are there any operating systems that pass /dev/fd/xxx for setuid
3967 * scripts, as suggested/described in perlsec(1)? Surely they do not
3968 * pass the script name as we do, so the "script changed" test would
3969 * fail for them... but we never get here with
3970 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3972 * This is one place where we must "lie" about return status: not
3973 * say if the stat() failed. We are doing this as root, and could
3974 * be tricked into reporting existence or not of files that the
3975 * "plain" user cannot even see.
3979 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3980 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3981 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3982 Perl_croak(aTHX_ "Setuid script changed\n");
3986 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3987 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3990 * We used to do this check as the "plain" user (after swapping
3991 * UIDs). But the check for nosuid and noexec filesystem is needed,
3992 * and should be done even without HAS_SETREUID. (Maybe those
3993 * operating systems do not have such mount options anyway...)
3994 * Seems safe enough to do as root.
3996 # if !defined(NO_NOSUID_CHECK)
3997 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3998 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4001 # endif /* IAMSUID */
4003 if (!S_ISREG(PL_statbuf.st_mode)) {
4004 Perl_croak(aTHX_ "Setuid script not plain file\n");
4006 if (PL_statbuf.st_mode & S_IWOTH)
4007 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4008 PL_doswitches = FALSE; /* -s is insecure in suid */
4009 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4010 CopLINE_inc(PL_curcop);
4011 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4012 Perl_croak(aTHX_ "No #! line");
4013 linestr = SvPV_nolen_const(linestr_sv);
4014 /* required even on Sys V */
4015 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4016 Perl_croak(aTHX_ "No #! line");
4020 /* Sanity check on line length */
4021 s_end = s + strlen(s);
4022 if (s_end == s || (s_end - s) > 4000)
4023 Perl_croak(aTHX_ "Very long #! line");
4024 /* Allow more than a single space after #! */
4025 while (isSPACE(*s)) s++;
4026 /* Sanity check on buffer end */
4027 while ((*s) && !isSPACE(*s)) s++;
4028 for (s2 = s; (s2 > linestr &&
4029 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4030 || s2[-1] == '-')); s2--) ;
4031 /* Sanity check on buffer start */
4032 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4033 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4034 Perl_croak(aTHX_ "Not a perl script");
4035 while (*s == ' ' || *s == '\t') s++;
4037 * #! arg must be what we saw above. They can invoke it by
4038 * mentioning suidperl explicitly, but they may not add any strange
4039 * arguments beyond what #! says if they do invoke suidperl that way.
4042 * The way validarg was set up, we rely on the kernel to start
4043 * scripts with argv[1] set to contain all #! line switches (the
4047 * Check that we got all the arguments listed in the #! line (not
4048 * just that there are no extraneous arguments). Might not matter
4049 * much, as switches from #! line seem to be acted upon (also), and
4050 * so may be checked and trapped in perl. But, security checks must
4051 * be done in suidperl and not deferred to perl. Note that suidperl
4052 * does not get around to parsing (and checking) the switches on
4053 * the #! line (but execs perl sooner).
4054 * Allow (require) a trailing newline (which may be of two
4055 * characters on some architectures?) (but no other trailing
4058 len = strlen(validarg);
4059 if (strEQ(validarg," PHOOEY ") ||
4060 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4061 !((s_end - s) == len+1
4062 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4063 Perl_croak(aTHX_ "Args must match #! line");
4067 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4068 PL_euid == PL_statbuf.st_uid)
4070 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4071 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4072 # endif /* IAMSUID */
4075 PL_euid) { /* oops, we're not the setuid root perl */
4077 * When root runs a setuid script, we do not go through the same
4078 * steps of execing sperl and then perl with fd scripts, but
4079 * simply set up UIDs within the same perl invocation; so do
4080 * not have the same checks (on options, whatever) that we have
4081 * for plain users. No problem really: would have to be a script
4082 * that does not actually work for plain users; and if root is
4083 * foolish and can be persuaded to run such an unsafe script, he
4084 * might run also non-setuid ones, and deserves what he gets.
4086 * Or, we might drop the PL_euid check above (and rely just on
4087 * fdscript to avoid loops), and do the execs
4093 * Pass fd script to suidperl.
4094 * Exec suidperl, substituting fd script for scriptname.
4095 * Pass script name as "subdir" of fd, which perl will grok;
4096 * in fact will use that to distinguish this from "normal"
4097 * usage, see comments above.
4099 PerlIO_rewind(rsfp);
4100 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4101 /* PSz 27 Feb 04 Sanity checks on scriptname */
4102 if ((!scriptname) || (!*scriptname) ) {
4103 Perl_croak(aTHX_ "No setuid script name\n");
4105 if (*scriptname == '-') {
4106 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4107 /* Or we might confuse it with an option when replacing
4108 * name in argument list, below (though we do pointer, not
4109 * string, comparisons).
4112 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4113 if (!PL_origargv[which]) {
4114 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4116 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4117 PerlIO_fileno(rsfp), PL_origargv[which]));
4118 # if defined(HAS_FCNTL) && defined(F_SETFD)
4119 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4122 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4123 (int)PERL_REVISION, (int)PERL_VERSION,
4124 (int)PERL_SUBVERSION), PL_origargv);
4126 # endif /* IAMSUID */
4127 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4130 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4132 * This seems back to front: we try HAS_SETEGID first; if not available
4133 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4134 * in the sense that we only want to set EGID; but are there any machines
4135 * with either of the latter, but not the former? Same with UID, later.
4138 (void)setegid(PL_statbuf.st_gid);
4140 # ifdef HAS_SETREGID
4141 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4143 # ifdef HAS_SETRESGID
4144 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4146 PerlProc_setgid(PL_statbuf.st_gid);
4150 if (PerlProc_getegid() != PL_statbuf.st_gid)
4151 Perl_croak(aTHX_ "Can't do setegid!\n");
4153 if (PL_statbuf.st_mode & S_ISUID) {
4154 if (PL_statbuf.st_uid != PL_euid)
4156 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4158 # ifdef HAS_SETREUID
4159 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4161 # ifdef HAS_SETRESUID
4162 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4164 PerlProc_setuid(PL_statbuf.st_uid);
4168 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4169 Perl_croak(aTHX_ "Can't do seteuid!\n");
4171 else if (PL_uid) { /* oops, mustn't run as root */
4173 (void)seteuid((Uid_t)PL_uid);
4175 # ifdef HAS_SETREUID
4176 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4178 # ifdef HAS_SETRESUID
4179 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4181 PerlProc_setuid((Uid_t)PL_uid);
4185 if (PerlProc_geteuid() != PL_uid)
4186 Perl_croak(aTHX_ "Can't do seteuid!\n");
4189 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4190 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4193 else if (fdscript < 0 || !suidscript)
4194 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4195 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4197 /* PSz 16 Sep 03 Keep neat error message */
4198 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4201 /* We absolutely must clear out any saved ids here, so we */
4202 /* exec the real perl, substituting fd script for scriptname. */
4203 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4205 * It might be thought that using setresgid and/or setresuid (changed to
4206 * set the saved IDs) above might obviate the need to exec, and we could
4207 * go on to "do the perl thing".
4209 * Is there such a thing as "saved GID", and is that set for setuid (but
4210 * not setgid) execution like suidperl? Without exec, it would not be
4211 * cleared for setuid (but not setgid) scripts (or might need a dummy
4214 * We need suidperl to do the exact same argument checking that perl
4215 * does. Thus it cannot be very small; while it could be significantly
4216 * smaller, it is safer (simpler?) to make it essentially the same
4217 * binary as perl (but they are not identical). - Maybe could defer that
4218 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4219 * but prefer to do thorough checks in suidperl itself. Such deferral
4220 * would make suidperl security rely on perl, a design no-no.
4222 * Setuid things should be short and simple, thus easy to understand and
4223 * verify. They should do their "own thing", without influence by
4224 * attackers. It may help if their internal execution flow is fixed,
4225 * regardless of platform: it may be best to exec anyway.
4227 * Suidperl should at least be conceptually simple: a wrapper only,
4228 * never to do any real perl. Maybe we should put
4230 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4232 * into the perly bits.
4234 PerlIO_rewind(rsfp);
4235 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4237 * Keep original arguments: suidperl already has fd script.
4239 # if defined(HAS_FCNTL) && defined(F_SETFD)
4240 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4243 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4244 (int)PERL_REVISION, (int)PERL_VERSION,
4245 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4247 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4248 # endif /* IAMSUID */
4253 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4254 /* Don't even need this function. */
4257 S_validate_suid(pTHX_ PerlIO *rsfp)
4259 PERL_ARGS_ASSERT_VALIDATE_SUID;
4261 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4262 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4265 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4266 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4268 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4271 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4272 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4273 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4274 /* not set-id, must be wrapped */
4277 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4281 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4285 register const char *s2;
4286 #ifdef MACOS_TRADITIONAL
4290 PERL_ARGS_ASSERT_FIND_BEGINNING;
4292 /* skip forward in input to the real script? */
4294 #ifdef MACOS_TRADITIONAL
4295 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4297 while (PL_doextract || gMacPerl_AlwaysExtract) {
4298 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4299 if (!gMacPerl_AlwaysExtract)
4300 Perl_croak(aTHX_ "No Perl script found in input\n");
4302 if (PL_doextract) /* require explicit override ? */
4303 if (!OverrideExtract(PL_origfilename))
4304 Perl_croak(aTHX_ "User aborted script\n");
4306 PL_doextract = FALSE;
4308 /* Pater peccavi, file does not have #! */
4309 PerlIO_rewind(rsfp);
4314 while (PL_doextract) {
4315 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4316 Perl_croak(aTHX_ "No Perl script found in input\n");
4319 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4320 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4321 PL_doextract = FALSE;
4322 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4324 while (*s == ' ' || *s == '\t') s++;
4326 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4327 || s2[-1] == '_') s2--;
4328 if (strnEQ(s2-4,"perl",4))
4329 while ((s = moreswitches(s)))
4332 #ifdef MACOS_TRADITIONAL
4333 /* We are always searching for the #!perl line in MacPerl,
4334 * so if we find it, still keep the line count correct
4335 * by counting lines we already skipped over
4337 for (; maclines > 0 ; maclines--)
4338 PerlIO_ungetc(rsfp, '\n');
4342 /* gMacPerl_AlwaysExtract is false in MPW tool */
4343 } else if (gMacPerl_AlwaysExtract) {
4355 PL_uid = PerlProc_getuid();
4356 PL_euid = PerlProc_geteuid();
4357 PL_gid = PerlProc_getgid();
4358 PL_egid = PerlProc_getegid();
4360 PL_uid |= PL_gid << 16;
4361 PL_euid |= PL_egid << 16;
4363 /* Should not happen: */
4364 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4365 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4368 * Should go by suidscript, not uid!=euid: why disallow
4369 * system("ls") in scripts run from setuid things?
4370 * Or, is this run before we check arguments and set suidscript?
4371 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4372 * (We never have suidscript, can we be sure to have fdscript?)
4373 * Or must then go by UID checks? See comments in forbid_setid also.
4377 /* This is used very early in the lifetime of the program,
4378 * before even the options are parsed, so PL_tainting has
4379 * not been initialized properly. */
4381 Perl_doing_taint(int argc, char *argv[], char *envp[])
4383 #ifndef PERL_IMPLICIT_SYS
4384 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4385 * before we have an interpreter-- and the whole point of this
4386 * function is to be called at such an early stage. If you are on
4387 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4388 * "tainted because running with altered effective ids', you'll
4389 * have to add your own checks somewhere in here. The two most
4390 * known samples of 'implicitness' are Win32 and NetWare, neither
4391 * of which has much of concept of 'uids'. */
4392 int uid = PerlProc_getuid();
4393 int euid = PerlProc_geteuid();
4394 int gid = PerlProc_getgid();
4395 int egid = PerlProc_getegid();
4402 if (uid && (euid != uid || egid != gid))
4404 #endif /* !PERL_IMPLICIT_SYS */
4405 /* This is a really primitive check; environment gets ignored only
4406 * if -T are the first chars together; otherwise one gets
4407 * "Too late" message. */
4408 if ( argc > 1 && argv[1][0] == '-'
4409 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4414 /* Passing the flag as a single char rather than a string is a slight space
4415 optimisation. The only message that isn't /^-.$/ is
4416 "program input from stdin", which is substituted in place of '\0', which
4417 could never be a command line flag. */
4419 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4422 char string[3] = "-x";
4423 const char *message = "program input from stdin";
4430 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4431 if (PL_euid != PL_uid)
4432 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4433 if (PL_egid != PL_gid)
4434 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4435 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4437 * Checks for UID/GID above "wrong": why disallow
4438 * perl -e 'print "Hello\n"'
4439 * from within setuid things?? Simply drop them: replaced by
4440 * fdscript/suidscript and #ifdef IAMSUID checks below.
4442 * This may be too late for command-line switches. Will catch those on
4443 * the #! line, after finding the script name and setting up
4444 * fdscript/suidscript. Note that suidperl does not get around to
4445 * parsing (and checking) the switches on the #! line, but checks that
4446 * the two sets are identical.
4448 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4449 * instead, or would that be "too late"? (We never have suidscript, can
4450 * we be sure to have fdscript?)
4452 * Catch things with suidscript (in descendant of suidperl), even with
4453 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4454 * below; but I am paranoid.
4456 * Also see comments about root running a setuid script, elsewhere.
4459 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4461 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4462 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4463 #endif /* IAMSUID */
4467 Perl_init_debugger(pTHX)
4470 HV * const ostash = PL_curstash;
4472 PL_curstash = PL_debstash;
4473 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4475 AvREAL_off(PL_dbargs);
4476 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4477 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4478 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4479 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4480 sv_setiv(PL_DBsingle, 0);
4481 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4482 sv_setiv(PL_DBtrace, 0);
4483 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4484 sv_setiv(PL_DBsignal, 0);
4485 PL_curstash = ostash;
4488 #ifndef STRESS_REALLOC
4489 #define REASONABLE(size) (size)
4491 #define REASONABLE(size) (1) /* unreasonable */
4495 Perl_init_stacks(pTHX)
4498 /* start with 128-item stack and 8K cxstack */
4499 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4500 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4501 PL_curstackinfo->si_type = PERLSI_MAIN;
4502 PL_curstack = PL_curstackinfo->si_stack;
4503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4505 PL_stack_base = AvARRAY(PL_curstack);
4506 PL_stack_sp = PL_stack_base;
4507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4509 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4512 PL_tmps_max = REASONABLE(128);
4514 Newx(PL_markstack,REASONABLE(32),I32);
4515 PL_markstack_ptr = PL_markstack;
4516 PL_markstack_max = PL_markstack + REASONABLE(32);
4520 Newx(PL_scopestack,REASONABLE(32),I32);
4521 PL_scopestack_ix = 0;
4522 PL_scopestack_max = REASONABLE(32);
4524 Newx(PL_savestack,REASONABLE(128),ANY);
4525 PL_savestack_ix = 0;
4526 PL_savestack_max = REASONABLE(128);
4535 while (PL_curstackinfo->si_next)
4536 PL_curstackinfo = PL_curstackinfo->si_next;
4537 while (PL_curstackinfo) {
4538 PERL_SI *p = PL_curstackinfo->si_prev;
4539 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4540 Safefree(PL_curstackinfo->si_cxstack);
4541 Safefree(PL_curstackinfo);
4542 PL_curstackinfo = p;
4544 Safefree(PL_tmps_stack);
4545 Safefree(PL_markstack);
4546 Safefree(PL_scopestack);
4547 Safefree(PL_savestack);
4552 S_init_predump_symbols(pTHX)
4558 sv_setpvs(get_sv("\"", TRUE), " ");
4559 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4561 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4562 GvMULTI_on(PL_stdingv);
4563 io = GvIOp(PL_stdingv);
4564 IoTYPE(io) = IoTYPE_RDONLY;
4565 IoIFP(io) = PerlIO_stdin();
4566 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4568 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4570 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4573 IoTYPE(io) = IoTYPE_WRONLY;
4574 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4576 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4578 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4580 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4581 GvMULTI_on(PL_stderrgv);
4582 io = GvIOp(PL_stderrgv);
4583 IoTYPE(io) = IoTYPE_WRONLY;
4584 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4585 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4587 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4589 PL_statname = newSV(0); /* last filename we did stat on */
4591 Safefree(PL_osname);
4592 PL_osname = savepv(OSNAME);
4596 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4600 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4602 argc--,argv++; /* skip name of script */
4603 if (PL_doswitches) {
4604 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4608 if (argv[0][1] == '-' && !argv[0][2]) {
4612 if ((s = strchr(argv[0], '='))) {
4613 const char *const start_name = argv[0] + 1;
4614 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4615 TRUE, SVt_PV)), s + 1);
4618 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4621 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4622 GvMULTI_on(PL_argvgv);
4623 (void)gv_AVadd(PL_argvgv);
4624 av_clear(GvAVn(PL_argvgv));
4625 for (; argc > 0; argc--,argv++) {
4626 SV * const sv = newSVpv(argv[0],0);
4627 av_push(GvAVn(PL_argvgv),sv);
4628 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4629 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4632 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4633 (void)sv_utf8_decode(sv);
4639 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4644 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4646 PL_toptarget = newSV_type(SVt_PVFM);
4647 sv_setpvs(PL_toptarget, "");
4648 PL_bodytarget = newSV_type(SVt_PVFM);
4649 sv_setpvs(PL_bodytarget, "");
4650 PL_formtarget = PL_bodytarget;
4654 init_argv_symbols(argc,argv);
4656 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4657 #ifdef MACOS_TRADITIONAL
4658 /* $0 is not majick on a Mac */
4659 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4661 sv_setpv(GvSV(tmpgv),PL_origfilename);
4663 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4665 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4669 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4671 bool env_is_not_environ;
4672 GvMULTI_on(PL_envgv);
4673 hv = GvHVn(PL_envgv);
4674 hv_magic(hv, NULL, PERL_MAGIC_env);
4676 #ifdef USE_ENVIRON_ARRAY
4677 /* Note that if the supplied env parameter is actually a copy
4678 of the global environ then it may now point to free'd memory
4679 if the environment has been modified since. To avoid this
4680 problem we treat env==NULL as meaning 'use the default'
4684 env_is_not_environ = env != environ;
4685 if (env_is_not_environ
4686 # ifdef USE_ITHREADS
4687 && PL_curinterp == aTHX
4696 for (; *env; env++) {
4699 if (!(s = strchr(old_var,'=')) || s == old_var)
4702 #if defined(MSDOS) && !defined(DJGPP)
4704 (void)strupr(old_var);
4707 sv = newSVpv(s+1, 0);
4708 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4709 if (env_is_not_environ)
4713 #endif /* USE_ENVIRON_ARRAY */
4714 #endif /* !PERL_MICRO */
4717 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4718 SvREADONLY_off(GvSV(tmpgv));
4719 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4720 SvREADONLY_on(GvSV(tmpgv));
4722 #ifdef THREADS_HAVE_PIDS
4723 PL_ppid = (IV)getppid();
4726 /* touch @F array to prevent spurious warnings 20020415 MJD */
4728 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4733 S_init_perllib(pTHX)
4739 s = PerlEnv_getenv("PERL5LIB");
4741 * It isn't possible to delete an environment variable with
4742 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4743 * case we treat PERL5LIB as undefined if it has a zero-length value.
4745 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4746 if (s && *s != '\0')
4750 incpush(s, TRUE, TRUE, TRUE, FALSE, FALSE);
4752 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE, FALSE);
4754 /* Treat PERL5?LIB as a possible search list logical name -- the
4755 * "natural" VMS idiom for a Unix path string. We allow each
4756 * element to be a set of |-separated directories for compatibility.
4760 if (my_trnlnm("PERL5LIB",buf,0))
4761 do { incpush(buf,TRUE,TRUE,TRUE,FALSE, FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4763 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE, FALSE);
4767 /* Use the ~-expanded versions of APPLLIB (undocumented),
4768 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4771 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE, FALSE);
4775 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4777 #ifdef MACOS_TRADITIONAL
4780 SV * privdir = newSV(0);
4781 char * macperl = PerlEnv_getenv("MACPERL");
4786 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4787 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4788 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4789 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4790 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4791 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4793 SvREFCNT_dec(privdir);
4796 incpush(":", FALSE, FALSE, FALSE, FALSE, FALSE);
4799 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4802 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4804 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4808 /* sitearch is always relative to sitelib on Windows for
4809 * DLL-based path intuition to work correctly */
4810 # if !defined(WIN32)
4811 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4817 /* this picks up sitearch as well */
4818 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4820 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4824 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4825 /* Search for version-specific dirs below here */
4826 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4829 #ifdef PERL_VENDORARCH_EXP
4830 /* vendorarch is always relative to vendorlib on Windows for
4831 * DLL-based path intuition to work correctly */
4832 # if !defined(WIN32)
4833 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4837 #ifdef PERL_VENDORLIB_EXP
4839 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE); /* this picks up vendorarch as well */
4841 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4845 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4846 /* Search for version-specific dirs below here */
4847 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4850 #ifdef PERL_OTHERLIBDIRS
4851 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE, FALSE);
4855 incpush(".", FALSE, FALSE, FALSE, FALSE, FALSE);
4856 #endif /* MACOS_TRADITIONAL */
4859 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4860 # define PERLLIB_SEP ';'
4863 # define PERLLIB_SEP '|'
4865 # if defined(MACOS_TRADITIONAL)
4866 # define PERLLIB_SEP ','
4868 # define PERLLIB_SEP ':'
4872 #ifndef PERLLIB_MANGLE
4873 # define PERLLIB_MANGLE(s,n) (s)
4876 /* Push a directory onto @INC if it exists.
4877 Generate a new SV if we do this, to save needing to copy the SV we push
4880 S_incpush_if_exists(pTHX_ SV *dir)
4885 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4887 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4888 S_ISDIR(tmpstatbuf.st_mode)) {
4889 av_push(GvAVn(PL_incgv), dir);
4896 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4897 bool canrelocate, bool unshift)
4901 const char *p = dir;
4906 if (addsubdirs || addoldvers) {
4910 /* Break at all separators */
4912 SV *libdir = newSV(0);
4915 /* skip any consecutive separators */
4917 while ( *p == PERLLIB_SEP ) {
4918 /* Uncomment the next line for PATH semantics */
4919 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4924 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4925 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4930 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4931 p = NULL; /* break out */
4933 #ifdef MACOS_TRADITIONAL
4934 if (!strchr(SvPVX(libdir), ':')) {
4937 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4939 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4940 sv_catpvs(libdir, ":");
4943 /* Do the if() outside the #ifdef to avoid warnings about an unused
4946 #ifdef PERL_RELOCATABLE_INC
4948 * Relocatable include entries are marked with a leading .../
4951 * 0: Remove that leading ".../"
4952 * 1: Remove trailing executable name (anything after the last '/')
4953 * from the perl path to give a perl prefix
4955 * While the @INC element starts "../" and the prefix ends with a real
4956 * directory (ie not . or ..) chop that real directory off the prefix
4957 * and the leading "../" from the @INC element. ie a logical "../"
4959 * Finally concatenate the prefix and the remainder of the @INC element
4960 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4961 * generates /usr/local/lib/perl5
4963 const char *libpath = SvPVX(libdir);
4964 STRLEN libpath_len = SvCUR(libdir);
4965 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4967 SV * const caret_X = get_sv("\030", 0);
4968 /* Going to use the SV just as a scratch buffer holding a C
4974 /* $^X is *the* source of taint if tainting is on, hence
4975 SvPOK() won't be true. */
4977 assert(SvPOKp(caret_X));
4978 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4980 /* Firstly take off the leading .../
4981 If all else fail we'll do the paths relative to the current
4983 sv_chop(libdir, libpath + 4);
4984 /* Don't use SvPV as we're intentionally bypassing taining,
4985 mortal copies that the mg_get of tainting creates, and
4986 corruption that seems to come via the save stack.
4987 I guess that the save stack isn't correctly set up yet. */
4988 libpath = SvPVX(libdir);
4989 libpath_len = SvCUR(libdir);
4991 /* This would work more efficiently with memrchr, but as it's
4992 only a GNU extension we'd need to probe for it and
4993 implement our own. Not hard, but maybe not worth it? */
4995 prefix = SvPVX(prefix_sv);
4996 lastslash = strrchr(prefix, '/');
4998 /* First time in with the *lastslash = '\0' we just wipe off
4999 the trailing /perl from (say) /usr/foo/bin/perl
5003 while ((*lastslash = '\0'), /* Do that, come what may. */
5004 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5005 && (lastslash = strrchr(prefix, '/')))) {
5006 if (lastslash[1] == '\0'
5007 || (lastslash[1] == '.'
5008 && (lastslash[2] == '/' /* ends "/." */
5009 || (lastslash[2] == '/'
5010 && lastslash[3] == '/' /* or "/.." */
5012 /* Prefix ends "/" or "/." or "/..", any of which
5013 are fishy, so don't do any more logical cleanup.
5017 /* Remove leading "../" from path */
5020 /* Next iteration round the loop removes the last
5021 directory name from prefix by writing a '\0' in
5022 the while clause. */
5024 /* prefix has been terminated with a '\0' to the correct
5025 length. libpath points somewhere into the libdir SV.
5026 We need to join the 2 with '/' and drop the result into
5028 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5029 SvREFCNT_dec(libdir);
5030 /* And this is the new libdir. */
5033 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5034 /* Need to taint reloccated paths if running set ID */
5035 SvTAINTED_on(libdir);
5038 SvREFCNT_dec(prefix_sv);
5043 * BEFORE pushing libdir onto @INC we may first push version- and
5044 * archname-specific sub-directories.
5046 if (addsubdirs || addoldvers) {
5047 #ifdef PERL_INC_VERSION_LIST
5048 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5049 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5050 const char * const *incver;
5056 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5058 while (unix[len-1] == '/') len--; /* Cosmetic */
5059 sv_usepvn(libdir,unix,len);
5062 PerlIO_printf(Perl_error_log,
5063 "Failed to unixify @INC element \"%s\"\n",
5067 #ifdef MACOS_TRADITIONAL
5068 #define PERL_AV_SUFFIX_FMT ""
5069 #define PERL_ARCH_FMT "%s:"
5070 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5072 #define PERL_AV_SUFFIX_FMT "/"
5073 #define PERL_ARCH_FMT "/%s"
5074 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5076 /* .../version/archname if -d .../version/archname */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5079 (int)PERL_REVISION, (int)PERL_VERSION,
5080 (int)PERL_SUBVERSION, ARCHNAME);
5081 subdir = S_incpush_if_exists(aTHX_ subdir);
5083 /* .../version if -d .../version */
5084 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5086 (int)PERL_REVISION, (int)PERL_VERSION,
5087 (int)PERL_SUBVERSION);
5088 subdir = S_incpush_if_exists(aTHX_ subdir);
5090 /* .../archname if -d .../archname */
5091 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5092 SVfARG(libdir), ARCHNAME);
5093 subdir = S_incpush_if_exists(aTHX_ subdir);
5097 #ifdef PERL_INC_VERSION_LIST
5099 for (incver = incverlist; *incver; incver++) {
5100 /* .../xxx if -d .../xxx */
5101 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5102 SVfARG(libdir), *incver);
5103 subdir = S_incpush_if_exists(aTHX_ subdir);
5109 /* finally add this lib directory at the end of @INC */
5111 av_unshift( GvAVn( PL_incgv ), 1 );
5112 av_store( GvAVn( PL_incgv ), 0, libdir );
5115 av_push(GvAVn(PL_incgv), libdir);
5119 assert (SvREFCNT(subdir) == 1);
5120 SvREFCNT_dec(subdir);
5126 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5130 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5136 PERL_ARGS_ASSERT_CALL_LIST;
5138 while (av_len(paramList) >= 0) {
5139 cv = MUTABLE_CV(av_shift(paramList));
5141 if (paramList == PL_beginav) {
5142 /* save PL_beginav for compiler */
5143 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5145 else if (paramList == PL_checkav) {
5146 /* save PL_checkav for compiler */
5147 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5149 else if (paramList == PL_unitcheckav) {
5150 /* save PL_unitcheckav for compiler */
5151 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5162 PL_madskills |= 16384;
5167 PL_madskills &= ~16384;
5170 (void)SvPV_const(atsv, len);
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5174 if (paramList == PL_beginav)
5175 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5177 Perl_sv_catpvf(aTHX_ atsv,
5178 "%s failed--call queue aborted",
5179 paramList == PL_checkav ? "CHECK"
5180 : paramList == PL_initav ? "INIT"
5181 : paramList == PL_unitcheckav ? "UNITCHECK"
5183 while (PL_scopestack_ix > oldscope)
5186 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5193 /* my_exit() was called */
5194 while (PL_scopestack_ix > oldscope)
5197 PL_curstash = PL_defstash;
5198 PL_curcop = &PL_compiling;
5199 CopLINE_set(PL_curcop, oldline);
5201 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5202 if (paramList == PL_beginav)
5203 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5205 Perl_croak(aTHX_ "%s failed--call queue aborted",
5206 paramList == PL_checkav ? "CHECK"
5207 : paramList == PL_initav ? "INIT"
5208 : paramList == PL_unitcheckav ? "UNITCHECK"
5215 PL_curcop = &PL_compiling;
5216 CopLINE_set(PL_curcop, oldline);
5219 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5228 Perl_my_exit(pTHX_ U32 status)
5239 STATUS_EXIT_SET(status);
5246 Perl_my_failure_exit(pTHX)
5250 /* We have been called to fall on our sword. The desired exit code
5251 * should be already set in STATUS_UNIX, but could be shifted over
5252 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5255 * If an error code has not been set, then force the issue.
5257 if (MY_POSIX_EXIT) {
5259 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5260 * the exit code when there isn't an error.
5263 if (STATUS_UNIX == 0)
5264 STATUS_UNIX_EXIT_SET(255);
5266 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5268 /* The exit code could have been set by $? or vmsish which
5269 * means that it may not be fatal. So convert
5270 * success/warning codes to fatal.
5272 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5273 STATUS_UNIX_EXIT_SET(255);
5277 /* Traditionally Perl on VMS always expects a Fatal Error. */
5278 if (vaxc$errno & 1) {
5280 /* So force success status to failure */
5281 if (STATUS_NATIVE & 1)
5286 STATUS_UNIX = EINTR; /* In case something cares */
5291 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5293 /* Encode the severity code */
5294 severity = STATUS_NATIVE & STS$M_SEVERITY;
5295 STATUS_UNIX = (severity ? severity : 1) << 8;
5297 /* Perl expects this to be a fatal error */
5298 if (severity != STS$K_SEVERE)
5307 STATUS_UNIX_SET(errno);
5309 exitstatus = STATUS_UNIX >> 8;
5310 if (exitstatus & 255)
5311 STATUS_UNIX_SET(exitstatus);
5313 STATUS_UNIX_SET(255);
5320 S_my_exit_jump(pTHX)
5325 SvREFCNT_dec(PL_e_script);
5329 POPSTACK_TO(PL_mainstack);
5337 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5340 const char * const p = SvPVX_const(PL_e_script);
5341 const char *nl = strchr(p, '\n');
5343 PERL_UNUSED_ARG(idx);
5344 PERL_UNUSED_ARG(maxlen);
5346 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5348 filter_del(read_e_script);
5351 sv_catpvn(buf_sv, p, nl-p);
5352 sv_chop(PL_e_script, nl);
5358 * c-indentation-style: bsd
5360 * indent-tabs-mode: t
5363 * ex: set ts=8 sts=4 sw=4 noet: