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();
470 =for apidoc nothreadhook
472 Stub that provides thread hook for perl_destruct when there are
479 Perl_nothreadhook(pTHX)
485 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
487 Perl_dump_sv_child(pTHX_ SV *sv)
490 const int sock = PL_dumper_fd;
491 const int debug_fd = PerlIO_fileno(Perl_debug_log);
492 union control_un control;
495 struct cmsghdr *cmptr;
497 unsigned char buffer[256];
499 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
501 if(sock == -1 || debug_fd == -1)
504 PerlIO_flush(Perl_debug_log);
506 /* All these shenanigans are to pass a file descriptor over to our child for
507 it to dump out to. We can't let it hold open the file descriptor when it
508 forks, as the file descriptor it will dump to can turn out to be one end
509 of pipe that some other process will wait on for EOF. (So as it would
510 be open, the wait would be forever.) */
512 msg.msg_control = control.control;
513 msg.msg_controllen = sizeof(control.control);
514 /* We're a connected socket so we don't need a destination */
520 cmptr = CMSG_FIRSTHDR(&msg);
521 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
522 cmptr->cmsg_level = SOL_SOCKET;
523 cmptr->cmsg_type = SCM_RIGHTS;
524 *((int *)CMSG_DATA(cmptr)) = 1;
526 vec[0].iov_base = (void*)&sv;
527 vec[0].iov_len = sizeof(sv);
528 got = sendmsg(sock, &msg, 0);
531 perror("Debug leaking scalars parent sendmsg failed");
534 if(got < sizeof(sv)) {
535 perror("Debug leaking scalars parent short sendmsg");
539 /* Return protocol is
541 unsigned char: length of location string (0 for empty)
542 unsigned char*: string (not terminated)
544 vec[0].iov_base = (void*)&returned_errno;
545 vec[0].iov_len = sizeof(returned_errno);
546 vec[1].iov_base = buffer;
549 got = readv(sock, vec, 2);
552 perror("Debug leaking scalars parent read failed");
553 PerlIO_flush(PerlIO_stderr());
556 if(got < sizeof(returned_errno) + 1) {
557 perror("Debug leaking scalars parent short read");
558 PerlIO_flush(PerlIO_stderr());
563 got = read(sock, buffer + 1, *buffer);
565 perror("Debug leaking scalars parent read 2 failed");
566 PerlIO_flush(PerlIO_stderr());
571 perror("Debug leaking scalars parent short read 2");
572 PerlIO_flush(PerlIO_stderr());
577 if (returned_errno || *buffer) {
578 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
579 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
580 returned_errno, strerror(returned_errno));
586 =for apidoc perl_destruct
588 Shuts down a Perl interpreter. See L<perlembed>.
597 VOL signed char destruct_level; /* see possible values in intrpvar.h */
599 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
603 PERL_ARGS_ASSERT_PERL_DESTRUCT;
605 PERL_UNUSED_ARG(my_perl);
608 /* wait for all pseudo-forked children to finish */
609 PERL_WAIT_FOR_CHILDREN;
611 destruct_level = PL_perl_destruct_level;
614 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
616 const int i = atoi(s);
617 if (destruct_level < i)
623 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
629 if (PL_endav && !PL_minus_c)
630 call_list(PL_scopestack_ix, PL_endav);
636 /* Need to flush since END blocks can produce output */
639 if (CALL_FPTR(PL_threadhook)(aTHX)) {
640 /* Threads hook has vetoed further cleanup */
641 PL_veto_cleanup = TRUE;
645 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
646 if (destruct_level != 0) {
647 /* Fork here to create a child. Our child's job is to preserve the
648 state of scalars prior to destruction, so that we can instruct it
649 to dump any scalars that we later find have leaked.
650 There's no subtlety in this code - it assumes POSIX, and it doesn't
654 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
655 perror("Debug leaking scalars socketpair failed");
661 perror("Debug leaking scalars fork failed");
665 /* We are the child */
666 const int sock = fd[1];
667 const int debug_fd = PerlIO_fileno(Perl_debug_log);
670 /* Our success message is an integer 0, and a char 0 */
671 static const char success[sizeof(int) + 1] = {0};
675 /* We need to close all other file descriptors otherwise we end up
676 with interesting hangs, where the parent closes its end of a
677 pipe, and sits waiting for (another) child to terminate. Only
678 that child never terminates, because it never gets EOF, because
679 we also have the far end of the pipe open. We even need to
680 close the debugging fd, because sometimes it happens to be one
681 end of a pipe, and a process is waiting on the other end for
682 EOF. Normally it would be closed at some point earlier in
683 destruction, but if we happen to cause the pipe to remain open,
684 EOF never occurs, and we get an infinite hang. Hence all the
685 games to pass in a file descriptor if it's actually needed. */
687 f = sysconf(_SC_OPEN_MAX);
689 where = "sysconf failed";
700 union control_un control;
703 struct cmsghdr *cmptr;
707 msg.msg_control = control.control;
708 msg.msg_controllen = sizeof(control.control);
709 /* We're a connected socket so we don't need a source */
713 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
715 vec[0].iov_base = (void*)⌖
716 vec[0].iov_len = sizeof(target);
718 got = recvmsg(sock, &msg, 0);
723 where = "recv failed";
726 if(got < sizeof(target)) {
727 where = "short recv";
731 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
735 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
736 where = "wrong cmsg_len";
739 if(cmptr->cmsg_level != SOL_SOCKET) {
740 where = "wrong cmsg_level";
743 if(cmptr->cmsg_type != SCM_RIGHTS) {
744 where = "wrong cmsg_type";
748 got_fd = *(int*)CMSG_DATA(cmptr);
749 /* For our last little bit of trickery, put the file descriptor
750 back into Perl_debug_log, as if we never actually closed it
752 if(got_fd != debug_fd) {
753 if (dup2(got_fd, debug_fd) == -1) {
760 PerlIO_flush(Perl_debug_log);
762 got = write(sock, &success, sizeof(success));
765 where = "write failed";
768 if(got < sizeof(success)) {
769 where = "short write";
776 int send_errno = errno;
777 unsigned char length = (unsigned char) strlen(where);
778 struct iovec failure[3] = {
779 {(void*)&send_errno, sizeof(send_errno)},
781 {(void*)where, length}
783 int got = writev(sock, failure, 3);
784 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
785 in the parent if we try to read from the socketpair after the
786 child has exited, even if there was data to read.
787 So sleep a bit to give the parent a fighting chance of
790 _exit((got == -1) ? errno : 0);
794 PL_dumper_fd = fd[0];
799 /* We must account for everything. */
801 /* Destroy the main CV and syntax tree */
802 /* Do this now, because destroying ops can cause new SVs to be generated
803 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
804 PL_curcop to point to a valid op from which the filename structure
806 PL_curcop = &PL_compiling;
808 /* ensure comppad/curpad to refer to main's pad */
809 if (CvPADLIST(PL_main_cv)) {
810 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
812 op_free(PL_main_root);
815 PL_main_start = NULL;
816 SvREFCNT_dec(PL_main_cv);
820 /* Tell PerlIO we are about to tear things apart in case
821 we have layers which are using resources that should
825 PerlIO_destruct(aTHX);
827 if (PL_sv_objcount) {
829 * Try to destruct global references. We do this first so that the
830 * destructors and destructees still exist. Some sv's might remain.
831 * Non-referenced objects are on their own.
835 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
836 PL_defoutgv = NULL; /* may have been freed */
839 /* unhook hooks which will soon be, or use, destroyed data */
840 SvREFCNT_dec(PL_warnhook);
842 SvREFCNT_dec(PL_diehook);
845 /* call exit list functions */
846 while (PL_exitlistlen-- > 0)
847 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
849 Safefree(PL_exitlist);
854 SvREFCNT_dec(PL_registered_mros);
856 /* jettison our possibly duplicated environment */
857 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
858 * so we certainly shouldn't free it here
861 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
862 if (environ != PL_origenviron && !PL_use_safe_putenv
864 /* only main thread can free environ[0] contents */
865 && PL_curinterp == aTHX
871 for (i = 0; environ[i]; i++)
872 safesysfree(environ[i]);
874 /* Must use safesysfree() when working with environ. */
875 safesysfree(environ);
877 environ = PL_origenviron;
880 #endif /* !PERL_MICRO */
882 if (destruct_level == 0) {
884 DEBUG_P(debprofdump());
886 #if defined(PERLIO_LAYERS)
887 /* No more IO - including error messages ! */
888 PerlIO_cleanup(aTHX);
891 CopFILE_free(&PL_compiling);
892 CopSTASH_free(&PL_compiling);
894 /* The exit() function will do everything that needs doing. */
898 /* reset so print() ends up where we expect */
902 /* the syntax tree is shared between clones
903 * so op_free(PL_main_root) only ReREFCNT_dec's
904 * REGEXPs in the parent interpreter
905 * we need to manually ReREFCNT_dec for the clones
907 SvREFCNT_dec(PL_regex_padav);
908 PL_regex_padav = NULL;
912 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
913 PL_stashcache = NULL;
915 /* loosen bonds of global variables */
917 /* XXX can PL_parser still be non-null here? */
918 if(PL_parser && PL_parser->rsfp) {
919 (void)PerlIO_close(PL_parser->rsfp);
920 PL_parser->rsfp = NULL;
924 Safefree(PL_splitstr);
934 PL_doswitches = FALSE;
935 PL_dowarn = G_WARN_OFF;
936 PL_doextract = FALSE;
937 PL_sawampersand = FALSE; /* must save all match strings */
940 Safefree(PL_inplace);
942 SvREFCNT_dec(PL_patchlevel);
945 SvREFCNT_dec(PL_e_script);
951 /* magical thingies */
953 SvREFCNT_dec(PL_ofsgv); /* *, */
956 SvREFCNT_dec(PL_ors_sv); /* $\ */
959 SvREFCNT_dec(PL_rs); /* $/ */
962 Safefree(PL_osname); /* $^O */
965 SvREFCNT_dec(PL_statname);
969 /* defgv, aka *_ should be taken care of elsewhere */
971 /* clean up after study() */
972 SvREFCNT_dec(PL_lastscream);
973 PL_lastscream = NULL;
974 Safefree(PL_screamfirst);
976 Safefree(PL_screamnext);
980 Safefree(PL_efloatbuf);
984 /* startup and shutdown function lists */
985 SvREFCNT_dec(PL_beginav);
986 SvREFCNT_dec(PL_beginav_save);
987 SvREFCNT_dec(PL_endav);
988 SvREFCNT_dec(PL_checkav);
989 SvREFCNT_dec(PL_checkav_save);
990 SvREFCNT_dec(PL_unitcheckav);
991 SvREFCNT_dec(PL_unitcheckav_save);
992 SvREFCNT_dec(PL_initav);
994 PL_beginav_save = NULL;
997 PL_checkav_save = NULL;
998 PL_unitcheckav = NULL;
999 PL_unitcheckav_save = NULL;
1002 /* shortcuts just get cleared */
1008 PL_argvoutgv = NULL;
1011 PL_last_in_gv = NULL;
1023 SvREFCNT_dec(PL_argvout_stack);
1024 PL_argvout_stack = NULL;
1026 SvREFCNT_dec(PL_modglobal);
1027 PL_modglobal = NULL;
1028 SvREFCNT_dec(PL_preambleav);
1029 PL_preambleav = NULL;
1030 SvREFCNT_dec(PL_subname);
1032 #ifdef PERL_USES_PL_PIDSTATUS
1033 SvREFCNT_dec(PL_pidstatus);
1034 PL_pidstatus = NULL;
1036 SvREFCNT_dec(PL_toptarget);
1037 PL_toptarget = NULL;
1038 SvREFCNT_dec(PL_bodytarget);
1039 PL_bodytarget = NULL;
1040 PL_formtarget = NULL;
1042 /* free locale stuff */
1043 #ifdef USE_LOCALE_COLLATE
1044 Safefree(PL_collation_name);
1045 PL_collation_name = NULL;
1048 #ifdef USE_LOCALE_NUMERIC
1049 Safefree(PL_numeric_name);
1050 PL_numeric_name = NULL;
1051 SvREFCNT_dec(PL_numeric_radix_sv);
1052 PL_numeric_radix_sv = NULL;
1055 /* clear utf8 character classes */
1056 SvREFCNT_dec(PL_utf8_alnum);
1057 SvREFCNT_dec(PL_utf8_alnumc);
1058 SvREFCNT_dec(PL_utf8_ascii);
1059 SvREFCNT_dec(PL_utf8_alpha);
1060 SvREFCNT_dec(PL_utf8_space);
1061 SvREFCNT_dec(PL_utf8_cntrl);
1062 SvREFCNT_dec(PL_utf8_graph);
1063 SvREFCNT_dec(PL_utf8_digit);
1064 SvREFCNT_dec(PL_utf8_upper);
1065 SvREFCNT_dec(PL_utf8_lower);
1066 SvREFCNT_dec(PL_utf8_print);
1067 SvREFCNT_dec(PL_utf8_punct);
1068 SvREFCNT_dec(PL_utf8_xdigit);
1069 SvREFCNT_dec(PL_utf8_mark);
1070 SvREFCNT_dec(PL_utf8_toupper);
1071 SvREFCNT_dec(PL_utf8_totitle);
1072 SvREFCNT_dec(PL_utf8_tolower);
1073 SvREFCNT_dec(PL_utf8_tofold);
1074 SvREFCNT_dec(PL_utf8_idstart);
1075 SvREFCNT_dec(PL_utf8_idcont);
1076 PL_utf8_alnum = NULL;
1077 PL_utf8_alnumc = NULL;
1078 PL_utf8_ascii = NULL;
1079 PL_utf8_alpha = NULL;
1080 PL_utf8_space = NULL;
1081 PL_utf8_cntrl = NULL;
1082 PL_utf8_graph = NULL;
1083 PL_utf8_digit = NULL;
1084 PL_utf8_upper = NULL;
1085 PL_utf8_lower = NULL;
1086 PL_utf8_print = NULL;
1087 PL_utf8_punct = NULL;
1088 PL_utf8_xdigit = NULL;
1089 PL_utf8_mark = NULL;
1090 PL_utf8_toupper = NULL;
1091 PL_utf8_totitle = NULL;
1092 PL_utf8_tolower = NULL;
1093 PL_utf8_tofold = NULL;
1094 PL_utf8_idstart = NULL;
1095 PL_utf8_idcont = NULL;
1097 if (!specialWARN(PL_compiling.cop_warnings))
1098 PerlMemShared_free(PL_compiling.cop_warnings);
1099 PL_compiling.cop_warnings = NULL;
1100 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1101 PL_compiling.cop_hints_hash = NULL;
1102 CopFILE_free(&PL_compiling);
1103 CopSTASH_free(&PL_compiling);
1105 /* Prepare to destruct main symbol table. */
1110 SvREFCNT_dec(PL_curstname);
1111 PL_curstname = NULL;
1113 /* clear queued errors */
1114 SvREFCNT_dec(PL_errors);
1117 SvREFCNT_dec(PL_isarev);
1120 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1121 if (PL_scopestack_ix != 0)
1122 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1123 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1124 (long)PL_scopestack_ix);
1125 if (PL_savestack_ix != 0)
1126 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1127 "Unbalanced saves: %ld more saves than restores\n",
1128 (long)PL_savestack_ix);
1129 if (PL_tmps_floor != -1)
1130 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1131 (long)PL_tmps_floor + 1);
1132 if (cxstack_ix != -1)
1133 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1134 (long)cxstack_ix + 1);
1137 /* Now absolutely destruct everything, somehow or other, loops or no. */
1139 /* the 2 is for PL_fdpid and PL_strtab */
1140 while (sv_clean_all() > 2)
1143 AvREAL_off(PL_fdpid); /* no surviving entries */
1144 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1147 #ifdef HAVE_INTERP_INTERN
1151 /* Destruct the global string table. */
1153 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1154 * so that sv_free() won't fail on them.
1155 * Now that the global string table is using a single hunk of memory
1156 * for both HE and HEK, we either need to explicitly unshare it the
1157 * correct way, or actually free things here.
1160 const I32 max = HvMAX(PL_strtab);
1161 HE * const * const array = HvARRAY(PL_strtab);
1162 HE *hent = array[0];
1165 if (hent && ckWARN_d(WARN_INTERNAL)) {
1166 HE * const next = HeNEXT(hent);
1167 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1168 "Unbalanced string table refcount: (%ld) for \"%s\"",
1169 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1176 hent = array[riter];
1181 HvARRAY(PL_strtab) = 0;
1182 HvTOTALKEYS(PL_strtab) = 0;
1183 HvFILL(PL_strtab) = 0;
1185 SvREFCNT_dec(PL_strtab);
1188 /* free the pointer tables used for cloning */
1189 ptr_table_free(PL_ptr_table);
1190 PL_ptr_table = (PTR_TBL_t*)NULL;
1193 /* free special SVs */
1195 SvREFCNT(&PL_sv_yes) = 0;
1196 sv_clear(&PL_sv_yes);
1197 SvANY(&PL_sv_yes) = NULL;
1198 SvFLAGS(&PL_sv_yes) = 0;
1200 SvREFCNT(&PL_sv_no) = 0;
1201 sv_clear(&PL_sv_no);
1202 SvANY(&PL_sv_no) = NULL;
1203 SvFLAGS(&PL_sv_no) = 0;
1207 for (i=0; i<=2; i++) {
1208 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1209 sv_clear(PERL_DEBUG_PAD(i));
1210 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1211 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1215 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1216 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1218 #ifdef DEBUG_LEAKING_SCALARS
1219 if (PL_sv_count != 0) {
1224 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1225 svend = &sva[SvREFCNT(sva)];
1226 for (sv = sva + 1; sv < svend; ++sv) {
1227 if (SvTYPE(sv) != SVTYPEMASK) {
1228 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1230 " refcnt=%"UVuf pTHX__FORMAT "\n"
1231 "\tallocated at %s:%d %s %s%s\n",
1232 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1234 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1236 sv->sv_debug_inpad ? "for" : "by",
1237 sv->sv_debug_optype ?
1238 PL_op_name[sv->sv_debug_optype]: "(none)",
1239 sv->sv_debug_cloned ? " (cloned)" : ""
1241 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1242 Perl_dump_sv_child(aTHX_ sv);
1248 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1252 /* Wait for up to 4 seconds for child to terminate.
1253 This seems to be the least effort way of timing out on reaping
1255 struct timeval waitfor = {4, 0};
1256 int sock = PL_dumper_fd;
1260 FD_SET(sock, &rset);
1261 select(sock + 1, &rset, NULL, NULL, &waitfor);
1262 waitpid(child, &status, WNOHANG);
1267 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1273 #ifdef PERL_DEBUG_READONLY_OPS
1279 #if defined(PERLIO_LAYERS)
1280 /* No more IO - including error messages ! */
1281 PerlIO_cleanup(aTHX);
1284 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1285 as currently layers use it rather than NULL as a marker
1286 for no arg - and will try and SvREFCNT_dec it.
1288 SvREFCNT(&PL_sv_undef) = 0;
1289 SvREADONLY_off(&PL_sv_undef);
1291 Safefree(PL_origfilename);
1292 PL_origfilename = NULL;
1293 Safefree(PL_reg_start_tmp);
1294 PL_reg_start_tmp = (char**)NULL;
1295 PL_reg_start_tmpl = 0;
1296 Safefree(PL_reg_curpm);
1297 Safefree(PL_reg_poscache);
1298 free_tied_hv_pool();
1299 Safefree(PL_op_mask);
1300 Safefree(PL_psig_ptr);
1301 PL_psig_ptr = (SV**)NULL;
1302 Safefree(PL_psig_name);
1303 PL_psig_name = (SV**)NULL;
1304 Safefree(PL_bitcount);
1306 Safefree(PL_psig_pend);
1307 PL_psig_pend = (int*)NULL;
1310 PL_tainting = FALSE;
1311 PL_taint_warn = FALSE;
1312 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1315 DEBUG_P(debprofdump());
1317 #ifdef USE_REENTRANT_API
1318 Perl_reentrant_free(aTHX);
1323 while (PL_regmatch_slab) {
1324 regmatch_slab *s = PL_regmatch_slab;
1325 PL_regmatch_slab = PL_regmatch_slab->next;
1329 /* As the absolutely last thing, free the non-arena SV for mess() */
1332 /* we know that type == SVt_PVMG */
1334 /* it could have accumulated taint magic */
1337 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1338 moremagic = mg->mg_moremagic;
1339 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1341 Safefree(mg->mg_ptr);
1345 /* we know that type >= SVt_PV */
1346 SvPV_free(PL_mess_sv);
1347 Safefree(SvANY(PL_mess_sv));
1348 Safefree(PL_mess_sv);
1355 =for apidoc perl_free
1357 Releases a Perl interpreter. See L<perlembed>.
1367 PERL_ARGS_ASSERT_PERL_FREE;
1369 if (PL_veto_cleanup)
1372 #ifdef PERL_TRACK_MEMPOOL
1375 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1376 * value as we're probably hunting memory leaks then
1378 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1379 if (!s || atoi(s) == 0) {
1380 const U32 old_debug = PL_debug;
1381 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1382 thread at thread exit. */
1384 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1385 "free this thread's memory\n");
1386 PL_debug &= ~ DEBUG_m_FLAG;
1388 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1389 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1390 PL_debug = old_debug;
1395 #if defined(WIN32) || defined(NETWARE)
1396 # if defined(PERL_IMPLICIT_SYS)
1399 void *host = nw_internal_host;
1401 void *host = w32_internal_host;
1403 PerlMem_free(aTHXx);
1405 nw_delete_internal_host(host);
1407 win32_delete_internal_host(host);
1411 PerlMem_free(aTHXx);
1414 PerlMem_free(aTHXx);
1418 #if defined(USE_ITHREADS)
1419 /* provide destructors to clean up the thread key when libperl is unloaded */
1420 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1422 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1423 #pragma fini "perl_fini"
1424 #elif defined(__sun) && !defined(__GNUC__)
1425 #pragma fini (perl_fini)
1429 #if defined(__GNUC__)
1430 __attribute__((destructor))
1435 if (PL_curinterp && !PL_veto_cleanup)
1440 #endif /* THREADS */
1443 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1446 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1447 PL_exitlist[PL_exitlistlen].fn = fn;
1448 PL_exitlist[PL_exitlistlen].ptr = ptr;
1452 #ifdef HAS_PROCSELFEXE
1453 /* This is a function so that we don't hold on to MAXPATHLEN
1454 bytes of stack longer than necessary
1457 S_procself_val(pTHX_ SV *sv, const char *arg0)
1459 char buf[MAXPATHLEN];
1460 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1462 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1463 includes a spurious NUL which will cause $^X to fail in system
1464 or backticks (this will prevent extensions from being built and
1465 many tests from working). readlink is not meant to add a NUL.
1466 Normal readlink works fine.
1468 if (len > 0 && buf[len-1] == '\0') {
1472 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1473 returning the text "unknown" from the readlink rather than the path
1474 to the executable (or returning an error from the readlink). Any valid
1475 path has a '/' in it somewhere, so use that to validate the result.
1476 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1478 if (len > 0 && memchr(buf, '/', len)) {
1479 sv_setpvn(sv,buf,len);
1485 #endif /* HAS_PROCSELFEXE */
1488 S_set_caret_X(pTHX) {
1490 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1492 #ifdef HAS_PROCSELFEXE
1493 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1496 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1498 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1505 =for apidoc perl_parse
1507 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1513 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1520 PERL_ARGS_ASSERT_PERL_PARSE;
1521 #ifndef MULTIPLICITY
1522 PERL_UNUSED_ARG(my_perl);
1525 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1526 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1527 "execute\nsetuid perl scripts securely.\n");
1530 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1531 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1532 * This MUST be done before any hash stores or fetches take place.
1533 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1534 * yourself, it is your responsibility to provide a good random seed!
1535 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1536 if (!PL_rehash_seed_set)
1537 PL_rehash_seed = get_hash_seed();
1539 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1541 if (s && (atoi(s) == 1))
1542 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1544 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1549 if (PL_origalen != 0) {
1550 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1553 /* Set PL_origalen be the sum of the contiguous argv[]
1554 * elements plus the size of the env in case that it is
1555 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1556 * as the maximum modifiable length of $0. In the worst case
1557 * the area we are able to modify is limited to the size of
1558 * the original argv[0]. (See below for 'contiguous', though.)
1560 const char *s = NULL;
1563 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1564 /* Do the mask check only if the args seem like aligned. */
1566 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1568 /* See if all the arguments are contiguous in memory. Note
1569 * that 'contiguous' is a loose term because some platforms
1570 * align the argv[] and the envp[]. If the arguments look
1571 * like non-aligned, assume that they are 'strictly' or
1572 * 'traditionally' contiguous. If the arguments look like
1573 * aligned, we just check that they are within aligned
1574 * PTRSIZE bytes. As long as no system has something bizarre
1575 * like the argv[] interleaved with some other data, we are
1576 * fine. (Did I just evoke Murphy's Law?) --jhi */
1577 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1579 for (i = 1; i < PL_origargc; i++) {
1580 if ((PL_origargv[i] == s + 1
1582 || PL_origargv[i] == s + 2
1587 (PL_origargv[i] > s &&
1589 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1600 #ifndef PERL_USE_SAFE_PUTENV
1601 /* Can we grab env area too to be used as the area for $0? */
1602 if (s && PL_origenviron && !PL_use_safe_putenv) {
1603 if ((PL_origenviron[0] == s + 1)
1606 (PL_origenviron[0] > s &&
1607 PL_origenviron[0] <=
1608 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1611 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1612 s = PL_origenviron[0];
1615 my_setenv("NoNe SuCh", NULL);
1616 /* Force copy of environment. */
1617 for (i = 1; PL_origenviron[i]; i++) {
1618 if (PL_origenviron[i] == s + 1
1621 (PL_origenviron[i] > s &&
1622 PL_origenviron[i] <=
1623 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1626 s = PL_origenviron[i];
1634 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1636 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1641 /* Come here if running an undumped a.out. */
1643 PL_origfilename = savepv(argv[0]);
1644 PL_do_undump = FALSE;
1645 cxstack_ix = -1; /* start label stack again */
1647 assert (!PL_tainted);
1649 S_set_caret_X(aTHX);
1651 init_postdump_symbols(argc,argv,env);
1656 op_free(PL_main_root);
1657 PL_main_root = NULL;
1659 PL_main_start = NULL;
1660 SvREFCNT_dec(PL_main_cv);
1664 oldscope = PL_scopestack_ix;
1665 PL_dowarn = G_WARN_OFF;
1670 parse_body(env,xsinit);
1672 call_list(oldscope, PL_unitcheckav);
1674 call_list(oldscope, PL_checkav);
1681 /* my_exit() was called */
1682 while (PL_scopestack_ix > oldscope)
1685 PL_curstash = PL_defstash;
1687 call_list(oldscope, PL_unitcheckav);
1689 call_list(oldscope, PL_checkav);
1693 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1702 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1706 int argc = PL_origargc;
1707 char **argv = PL_origargv;
1708 const char *scriptname = NULL;
1709 VOL bool dosearch = FALSE;
1711 const char *validarg = "";
1715 const char *cddir = NULL;
1716 #ifdef USE_SITECUSTOMIZE
1717 bool minus_f = FALSE;
1719 SV *linestr_sv = newSV_type(SVt_PVIV);
1720 bool add_read_e_script = FALSE;
1722 SvGROW(linestr_sv, 80);
1723 sv_setpvs(linestr_sv,"");
1725 sv = newSVpvs(""); /* first used for -I flags */
1731 for (argc--,argv++; argc > 0; argc--,argv++) {
1732 if (argv[0][0] != '-' || !argv[0][1])
1736 validarg = " PHOOEY ";
1740 * Can we rely on the kernel to start scripts with argv[1] set to
1741 * contain all #! line switches (the whole line)? (argv[0] is set to
1742 * the interpreter name, argv[2] to the script name; argv[3] and
1743 * above may contain other arguments.)
1750 #ifndef PERL_STRICT_CR
1774 if ((s = moreswitches(s)))
1779 CHECK_MALLOC_TOO_LATE_FOR('t');
1780 if( !PL_tainting ) {
1781 PL_taint_warn = TRUE;
1787 CHECK_MALLOC_TOO_LATE_FOR('T');
1789 PL_taint_warn = FALSE;
1797 #ifdef MACOS_TRADITIONAL
1798 /* ignore -e for Dev:Pseudo argument */
1799 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1802 forbid_setid('e', FALSE);
1804 PL_e_script = newSVpvs("");
1805 add_read_e_script = TRUE;
1808 sv_catpv(PL_e_script, s);
1810 sv_catpv(PL_e_script, argv[1]);
1814 Perl_croak(aTHX_ "No code specified for -%c", c);
1815 sv_catpvs(PL_e_script, "\n");
1819 #ifdef USE_SITECUSTOMIZE
1825 case 'I': /* -I handled both here and in moreswitches() */
1826 forbid_setid('I', FALSE);
1827 if (!*++s && (s=argv[1]) != NULL) {
1831 STRLEN len = strlen(s);
1832 const char * const p = savepvn(s, len);
1833 incpush(p, TRUE, TRUE, FALSE, FALSE, FALSE);
1834 sv_catpvs(sv, "-I");
1835 sv_catpvn(sv, p, len);
1840 Perl_croak(aTHX_ "No directory specified for -I");
1843 forbid_setid('S', FALSE);
1851 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1853 /* Can't do newSVpvs() as that would involve pre-processor
1854 condititionals inside a macro expansion. */
1855 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1862 # ifdef PERL_DONT_CREATE_GVSV
1863 " PERL_DONT_CREATE_GVSV"
1865 # ifdef PERL_MALLOC_WRAP
1868 # ifdef PERL_MEM_LOG
1871 # ifdef PERL_MEM_LOG_ENV
1874 # ifdef PERL_MEM_LOG_ENV_FD
1875 " PERL_MEM_LOG_ENV_FD"
1877 # ifdef PERL_MEM_LOG_STDERR
1878 " PERL_MEM_LOG_STDERR"
1880 # ifdef PERL_MEM_LOG_TIMESTAMP
1881 " PERL_MEM_LOG_TIMESTAMP"
1883 # ifdef PERL_USE_DEVEL
1886 # ifdef PERL_USE_SAFE_PUTENV
1887 " PERL_USE_SAFE_PUTENV"
1889 # ifdef USE_SITECUSTOMIZE
1890 " USE_SITECUSTOMIZE"
1892 # ifdef USE_FAST_STDIO
1897 sv_catpv(opts_prog, PL_bincompat_options);
1898 /* Terminate the qw(, and then wrap at 76 columns. */
1899 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1901 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1903 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1905 sv_catpvs(opts_prog," Source revision: " STRINGIFY(PERL_GIT_SHA1) "\\n");
1906 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1908 #if defined(LOCAL_PATCH_COUNT)
1909 if (LOCAL_PATCH_COUNT > 0) {
1911 sv_catpvs(opts_prog,
1912 "\" Locally applied patches:\\n\",");
1913 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1914 if (PL_localpatches[i])
1915 #ifdef X_PERL_PATCHNUM
1916 /* this is ifdef'ed out, we would enable this if we want to transform
1917 "DEVEL" registered patches into the git name */
1918 if (strEQ(PL_localpatches[i],"DEVEL"))
1919 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1920 0, STRINGIFY(PERL_PATCHNUM), 0);
1923 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1924 0, PL_localpatches[i], 0);
1928 Perl_sv_catpvf(aTHX_ opts_prog,
1929 "\" Built under %s\\n",OSNAME);
1932 sv_catpvs(opts_prog,
1933 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1935 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1938 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1939 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1940 "sort grep {/^PERL/} keys %ENV; ");
1942 sv_catpvs(opts_prog,
1943 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1945 sv_catpvs(opts_prog,
1946 "print \" \\%ENV:\\n @env\\n\" if @env;"
1947 "print \" \\@INC:\\n @INC\\n\";");
1951 opts_prog = Perl_newSVpvf(aTHX_
1952 "Config::config_vars(qw%c%s%c)",
1956 av_push(PL_preambleav, opts_prog);
1957 /* don't look for script or read stdin */
1958 scriptname = BIT_BUCKET;
1962 PL_doextract = TRUE;
1970 if (!*++s || isSPACE(*s)) {
1974 /* catch use of gnu style long options */
1975 if (strEQ(s, "version")) {
1979 if (strEQ(s, "help")) {
1986 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1997 #ifndef SECURE_INTERNAL_GETENV
2000 (s = PerlEnv_getenv("PERL5OPT")))
2004 if (*s == '-' && *(s+1) == 'T') {
2005 CHECK_MALLOC_TOO_LATE_FOR('T');
2007 PL_taint_warn = FALSE;
2010 char *popt_copy = NULL;
2023 if (!strchr("CDIMUdmtw", *s))
2024 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2028 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2029 s = popt_copy + (s - d);
2037 if( !PL_tainting ) {
2038 PL_taint_warn = TRUE;
2049 #ifdef USE_SITECUSTOMIZE
2051 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2052 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2057 scriptname = argv[0];
2060 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2062 else if (scriptname == NULL) {
2064 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2070 /* Set $^X early so that it can be used for relocatable paths in @INC */
2071 assert (!PL_tainted);
2073 S_set_caret_X(aTHX);
2078 bool suidscript = FALSE;
2081 const int fdscript =
2083 open_script(scriptname, dosearch, &suidscript, &rsfp);
2085 validate_suid(validarg, scriptname, fdscript, suidscript,
2089 # if defined(SIGCHLD) || defined(SIGCLD)
2092 # define SIGCHLD SIGCLD
2094 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2095 if (sigstate == (Sighandler_t) SIG_IGN) {
2096 if (ckWARN(WARN_SIGNAL))
2097 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2098 "Can't ignore signal CHLD, forcing to default");
2099 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2106 #ifdef MACOS_TRADITIONAL
2107 || gMacPerl_AlwaysExtract
2111 /* This will croak if suidscript is true, as -x cannot be used with
2113 forbid_setid('x', suidscript);
2114 /* Hence you can't get here if suidscript is true */
2116 find_beginning(linestr_sv, rsfp);
2117 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2118 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2122 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2123 CvUNIQUE_on(PL_compcv);
2125 CvPADLIST(PL_compcv) = pad_new(0);
2127 PL_isarev = newHV();
2130 boot_core_UNIVERSAL();
2131 boot_core_xsutils();
2135 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2137 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2143 # ifdef HAS_SOCKS5_INIT
2144 socks5_init(argv[0]);
2150 init_predump_symbols();
2151 /* init_postdump_symbols not currently designed to be called */
2152 /* more than once (ENV isn't cleared first, for example) */
2153 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2155 init_postdump_symbols(argc,argv,env);
2157 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2158 * or explicitly in some platforms.
2159 * locale.c:Perl_init_i18nl10n() if the environment
2160 * look like the user wants to use UTF-8. */
2161 #if defined(__SYMBIAN32__)
2162 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2165 /* Requires init_predump_symbols(). */
2166 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2171 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2172 * and the default open disciplines. */
2173 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2174 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2176 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2177 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2178 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2180 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2181 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2182 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2184 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2185 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2186 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2188 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2189 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2192 sv_setpvs(sv, ":utf8\0:utf8");
2194 sv_setpvs(sv, ":utf8\0");
2197 sv_setpvs(sv, "\0:utf8");
2205 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2206 if (strEQ(s, "unsafe"))
2207 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2208 else if (strEQ(s, "safe"))
2209 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2211 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2218 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2222 PL_xmlfp = PerlIO_stdout();
2224 PL_xmlfp = PerlIO_open(s, "w");
2226 Perl_croak(aTHX_ "Can't open %s", s);
2228 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2234 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2235 PL_madskills = atoi(s);
2236 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2241 lex_start(linestr_sv, rsfp, TRUE);
2242 PL_subname = newSVpvs("main");
2244 if (add_read_e_script)
2245 filter_add(read_e_script, NULL);
2247 /* now parse the script */
2249 SETERRNO(0,SS_NORMAL);
2250 #ifdef MACOS_TRADITIONAL
2251 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2253 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2255 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2256 MacPerl_MPWFileName(PL_origfilename));
2260 if (yyparse() || PL_parser->error_count) {
2262 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2264 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2269 CopLINE_set(PL_curcop, 0);
2270 PL_curstash = PL_defstash;
2272 SvREFCNT_dec(PL_e_script);
2280 SAVECOPFILE(PL_curcop);
2281 SAVECOPLINE(PL_curcop);
2282 gv_check(PL_defstash);
2291 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2292 dump_mstats("after compilation:");
2302 =for apidoc perl_run
2304 Tells a Perl interpreter to run. See L<perlembed>.
2317 PERL_ARGS_ASSERT_PERL_RUN;
2318 #ifndef MULTIPLICITY
2319 PERL_UNUSED_ARG(my_perl);
2322 oldscope = PL_scopestack_ix;
2330 cxstack_ix = -1; /* start context stack again */
2332 case 0: /* normal completion */
2336 case 2: /* my_exit() */
2337 while (PL_scopestack_ix > oldscope)
2340 PL_curstash = PL_defstash;
2341 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2342 PL_endav && !PL_minus_c)
2343 call_list(oldscope, PL_endav);
2345 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2346 dump_mstats("after execution: ");
2352 POPSTACK_TO(PL_mainstack);
2355 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2366 S_run_body(pTHX_ I32 oldscope)
2369 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2370 PL_sawampersand ? "Enabling" : "Omitting"));
2372 if (!PL_restartop) {
2376 exit(0); /* less likely to core dump than my_exit(0) */
2379 DEBUG_x(dump_all());
2382 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2386 #ifdef MACOS_TRADITIONAL
2387 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2388 (gMacPerl_ErrorFormat ? "# " : ""),
2389 MacPerl_MPWFileName(PL_origfilename));
2391 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2395 if (PERLDB_SINGLE && PL_DBsingle)
2396 sv_setiv(PL_DBsingle, 1);
2398 call_list(oldscope, PL_initav);
2399 #ifdef PERL_DEBUG_READONLY_OPS
2400 Perl_pending_Slabs_to_ro(aTHX);
2407 PL_op = PL_restartop;
2411 else if (PL_main_start) {
2412 CvDEPTH(PL_main_cv) = 1;
2413 PL_op = PL_main_start;
2421 =head1 SV Manipulation Functions
2423 =for apidoc p||get_sv
2425 Returns the SV of the specified Perl scalar. If C<create> is set and the
2426 Perl variable does not exist then it will be created. If C<create> is not
2427 set and the variable does not exist then NULL is returned.
2433 Perl_get_sv(pTHX_ const char *name, I32 create)
2437 PERL_ARGS_ASSERT_GET_SV;
2439 gv = gv_fetchpv(name, create, SVt_PV);
2446 =head1 Array Manipulation Functions
2448 =for apidoc p||get_av
2450 Returns the AV of the specified Perl array. If C<create> is set and the
2451 Perl variable does not exist then it will be created. If C<create> is not
2452 set and the variable does not exist then NULL is returned.
2458 Perl_get_av(pTHX_ const char *name, I32 create)
2460 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2462 PERL_ARGS_ASSERT_GET_AV;
2472 =head1 Hash Manipulation Functions
2474 =for apidoc p||get_hv
2476 Returns the HV of the specified Perl hash. If C<create> is set and the
2477 Perl variable does not exist then it will be created. If C<create> is not
2478 set and the variable does not exist then NULL is returned.
2484 Perl_get_hv(pTHX_ const char *name, I32 create)
2486 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2488 PERL_ARGS_ASSERT_GET_HV;
2498 =head1 CV Manipulation Functions
2500 =for apidoc p||get_cvn_flags
2502 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2503 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2504 exist then it will be declared (which has the same effect as saying
2505 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2506 then NULL is returned.
2508 =for apidoc p||get_cv
2510 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2516 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2518 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2519 /* XXX this is probably not what they think they're getting.
2520 * It has the same effect as "sub name;", i.e. just a forward
2523 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2525 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2526 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2527 return newSUB(start_subparse(FALSE, 0),
2528 newSVOP(OP_CONST, 0, sv),
2537 Perl_get_cv(pTHX_ const char *name, I32 flags)
2539 PERL_ARGS_ASSERT_GET_CV;
2541 return get_cvn_flags(name, strlen(name), flags);
2544 /* Be sure to refetch the stack pointer after calling these routines. */
2548 =head1 Callback Functions
2550 =for apidoc p||call_argv
2552 Performs a callback to the specified Perl sub. See L<perlcall>.
2558 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2560 /* See G_* flags in cop.h */
2561 /* null terminated arg list */
2566 PERL_ARGS_ASSERT_CALL_ARGV;
2571 mXPUSHs(newSVpv(*argv,0));
2576 return call_pv(sub_name, flags);
2580 =for apidoc p||call_pv
2582 Performs a callback to the specified Perl sub. See L<perlcall>.
2588 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2589 /* name of the subroutine */
2590 /* See G_* flags in cop.h */
2592 PERL_ARGS_ASSERT_CALL_PV;
2594 return call_sv(MUTABLE_SV(get_cv(sub_name, TRUE)), flags);
2598 =for apidoc p||call_method
2600 Performs a callback to the specified Perl method. The blessed object must
2601 be on the stack. See L<perlcall>.
2607 Perl_call_method(pTHX_ const char *methname, I32 flags)
2608 /* name of the subroutine */
2609 /* See G_* flags in cop.h */
2611 PERL_ARGS_ASSERT_CALL_METHOD;
2613 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2616 /* May be called with any of a CV, a GV, or an SV containing the name. */
2618 =for apidoc p||call_sv
2620 Performs a callback to the Perl sub whose name is in the SV. See
2627 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2628 /* See G_* flags in cop.h */
2631 LOGOP myop; /* fake syntax tree node */
2636 bool oldcatch = CATCH_GET;
2638 OP* const oldop = PL_op;
2641 PERL_ARGS_ASSERT_CALL_SV;
2643 if (flags & G_DISCARD) {
2647 if (!(flags & G_WANT)) {
2648 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2653 Zero(&myop, 1, LOGOP);
2654 myop.op_next = NULL;
2655 if (!(flags & G_NOARGS))
2656 myop.op_flags |= OPf_STACKED;
2657 myop.op_flags |= OP_GIMME_REVERSE(flags);
2661 EXTEND(PL_stack_sp, 1);
2662 *++PL_stack_sp = sv;
2664 oldscope = PL_scopestack_ix;
2666 if (PERLDB_SUB && PL_curstash != PL_debstash
2667 /* Handle first BEGIN of -d. */
2668 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2669 /* Try harder, since this may have been a sighandler, thus
2670 * curstash may be meaningless. */
2671 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2672 && !(flags & G_NODEBUG))
2673 PL_op->op_private |= OPpENTERSUB_DB;
2675 if (flags & G_METHOD) {
2676 Zero(&method_op, 1, UNOP);
2677 method_op.op_next = PL_op;
2678 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2679 method_op.op_type = OP_METHOD;
2680 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2681 myop.op_type = OP_ENTERSUB;
2682 PL_op = (OP*)&method_op;
2685 if (!(flags & G_EVAL)) {
2687 CALL_BODY_SUB((OP*)&myop);
2688 retval = PL_stack_sp - (PL_stack_base + oldmark);
2689 CATCH_SET(oldcatch);
2692 myop.op_other = (OP*)&myop;
2694 create_eval_scope(flags|G_FAKINGEVAL);
2702 CALL_BODY_SUB((OP*)&myop);
2703 retval = PL_stack_sp - (PL_stack_base + oldmark);
2704 if (!(flags & G_KEEPERR)) {
2712 /* my_exit() was called */
2713 PL_curstash = PL_defstash;
2716 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2717 Perl_croak(aTHX_ "Callback called exit");
2722 PL_op = PL_restartop;
2726 PL_stack_sp = PL_stack_base + oldmark;
2727 if ((flags & G_WANT) == G_ARRAY)
2731 *++PL_stack_sp = &PL_sv_undef;
2736 if (PL_scopestack_ix > oldscope)
2737 delete_eval_scope();
2741 if (flags & G_DISCARD) {
2742 PL_stack_sp = PL_stack_base + oldmark;
2751 /* Eval a string. The G_EVAL flag is always assumed. */
2754 =for apidoc p||eval_sv
2756 Tells Perl to C<eval> the string in the SV.
2762 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2764 /* See G_* flags in cop.h */
2768 UNOP myop; /* fake syntax tree node */
2769 VOL I32 oldmark = SP - PL_stack_base;
2772 OP* const oldop = PL_op;
2775 PERL_ARGS_ASSERT_EVAL_SV;
2777 if (flags & G_DISCARD) {
2784 Zero(PL_op, 1, UNOP);
2785 EXTEND(PL_stack_sp, 1);
2786 *++PL_stack_sp = sv;
2788 if (!(flags & G_NOARGS))
2789 myop.op_flags = OPf_STACKED;
2790 myop.op_next = NULL;
2791 myop.op_type = OP_ENTEREVAL;
2792 myop.op_flags |= OP_GIMME_REVERSE(flags);
2793 if (flags & G_KEEPERR)
2794 myop.op_flags |= OPf_SPECIAL;
2796 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2797 * before a PUSHEVAL, which corrupts the stack after a croak */
2798 TAINT_PROPER("eval_sv()");
2804 CALL_BODY_EVAL((OP*)&myop);
2805 retval = PL_stack_sp - (PL_stack_base + oldmark);
2806 if (!(flags & G_KEEPERR)) {
2814 /* my_exit() was called */
2815 PL_curstash = PL_defstash;
2818 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2819 Perl_croak(aTHX_ "Callback called exit");
2824 PL_op = PL_restartop;
2828 PL_stack_sp = PL_stack_base + oldmark;
2829 if ((flags & G_WANT) == G_ARRAY)
2833 *++PL_stack_sp = &PL_sv_undef;
2839 if (flags & G_DISCARD) {
2840 PL_stack_sp = PL_stack_base + oldmark;
2850 =for apidoc p||eval_pv
2852 Tells Perl to C<eval> the given string and return an SV* result.
2858 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2862 SV* sv = newSVpv(p, 0);
2864 PERL_ARGS_ASSERT_EVAL_PV;
2866 eval_sv(sv, G_SCALAR);
2873 if (croak_on_error && SvTRUE(ERRSV)) {
2874 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2880 /* Require a module. */
2883 =head1 Embedding Functions
2885 =for apidoc p||require_pv
2887 Tells Perl to C<require> the file named by the string argument. It is
2888 analogous to the Perl code C<eval "require '$file'">. It's even
2889 implemented that way; consider using load_module instead.
2894 Perl_require_pv(pTHX_ const char *pv)
2900 PERL_ARGS_ASSERT_REQUIRE_PV;
2902 PUSHSTACKi(PERLSI_REQUIRE);
2904 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2905 eval_sv(sv_2mortal(sv), G_DISCARD);
2911 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2913 /* This message really ought to be max 23 lines.
2914 * Removed -h because the user already knows that option. Others? */
2916 static const char * const usage_msg[] = {
2917 "-0[octal] specify record separator (\\0, if no argument)",
2918 "-a autosplit mode with -n or -p (splits $_ into @F)",
2919 "-C[number/list] enables the listed Unicode features",
2920 "-c check syntax only (runs BEGIN and CHECK blocks)",
2921 "-d[:debugger] run program under debugger",
2922 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2923 "-e program one line of program (several -e's allowed, omit programfile)",
2924 "-E program like -e, but enables all optional features",
2925 "-f don't do $sitelib/sitecustomize.pl at startup",
2926 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2927 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2928 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2929 "-l[octal] enable line ending processing, specifies line terminator",
2930 "-[mM][-]module execute \"use/no module...\" before executing program",
2931 "-n assume \"while (<>) { ... }\" loop around program",
2932 "-p assume loop like -n but print line also, like sed",
2933 "-s enable rudimentary parsing for switches after programfile",
2934 "-S look for programfile using PATH environment variable",
2935 "-t enable tainting warnings",
2936 "-T enable tainting checks",
2937 "-u dump core after parsing program",
2938 "-U allow unsafe operations",
2939 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2940 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2941 "-w enable many useful warnings (RECOMMENDED)",
2942 "-W enable all warnings",
2943 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2944 "-X disable all warnings",
2948 const char * const *p = usage_msg;
2950 PERL_ARGS_ASSERT_USAGE;
2952 PerlIO_printf(PerlIO_stdout(),
2953 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2956 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2959 /* convert a string of -D options (or digits) into an int.
2960 * sets *s to point to the char after the options */
2964 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2966 static const char * const usage_msgd[] = {
2967 " Debugging flag values: (see also -d)",
2968 " p Tokenizing and parsing (with v, displays parse stack)",
2969 " s Stack snapshots (with v, displays all stacks)",
2970 " l Context (loop) stack processing",
2971 " t Trace execution",
2972 " o Method and overloading resolution",
2973 " c String/numeric conversions",
2974 " P Print profiling info, source file input state",
2975 " m Memory and SV allocation",
2976 " f Format processing",
2977 " r Regular expression parsing and execution",
2978 " x Syntax tree dump",
2979 " u Tainting checks",
2980 " H Hash dump -- usurps values()",
2981 " X Scratchpad allocation",
2984 " R Include reference counts of dumped variables (eg when using -Ds)",
2985 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2986 " v Verbose: use in conjunction with other flags",
2988 " A Consistency checks on internal structures",
2989 " q quiet - currently only suppresses the 'EXECUTING' message",
2994 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2997 /* if adding extra options, remember to update DEBUG_MASK */
2998 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
3000 for (; isALNUM(**s); (*s)++) {
3001 const char * const d = strchr(debopts,**s);
3003 i |= 1 << (d - debopts);
3004 else if (ckWARN_d(WARN_DEBUGGING))
3005 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3006 "invalid option -D%c, use -D'' to see choices\n", **s);
3009 else if (isDIGIT(**s)) {
3011 for (; isALNUM(**s); (*s)++) ;
3013 else if (givehelp) {
3014 const char *const *p = usage_msgd;
3015 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3018 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3019 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3020 "-Dp not implemented on this platform\n");
3026 /* This routine handles any switches that can be given during run */
3029 Perl_moreswitches(pTHX_ const char *s)
3033 const char option = *s; /* used to remember option in -m/-M code */
3035 PERL_ARGS_ASSERT_MORESWITCHES;
3043 SvREFCNT_dec(PL_rs);
3044 if (s[1] == 'x' && s[2]) {
3045 const char *e = s+=2;
3051 flags = PERL_SCAN_SILENT_ILLDIGIT;
3052 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3053 if (s + numlen < e) {
3054 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3058 PL_rs = newSVpvs("");
3059 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3060 tmps = (U8*)SvPVX(PL_rs);
3061 uvchr_to_utf8(tmps, rschar);
3062 SvCUR_set(PL_rs, UNISKIP(rschar));
3067 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3068 if (rschar & ~((U8)~0))
3069 PL_rs = &PL_sv_undef;
3070 else if (!rschar && numlen >= 2)
3071 PL_rs = newSVpvs("");
3073 char ch = (char)rschar;
3074 PL_rs = newSVpvn(&ch, 1);
3077 sv_setsv(get_sv("/", TRUE), PL_rs);
3082 PL_unicode = parse_unicode_opts( (const char **)&s );
3083 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3089 while (*s && !isSPACE(*s)) ++s;
3090 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3101 forbid_setid('d', FALSE);
3104 /* -dt indicates to the debugger that threads will be used */
3105 if (*s == 't' && !isALNUM(s[1])) {
3107 my_setenv("PERL5DB_THREADED", "1");
3110 /* The following permits -d:Mod to accepts arguments following an =
3111 in the fashion that -MSome::Mod does. */
3112 if (*s == ':' || *s == '=') {
3113 const char *start = ++s;
3114 const char *const end = s + strlen(s);
3115 SV * const sv = newSVpvs("use Devel::");
3117 /* We now allow -d:Module=Foo,Bar */
3118 while(isALNUM(*s) || *s==':') ++s;
3120 sv_catpvn(sv, start, end - start);
3122 sv_catpvn(sv, start, s-start);
3123 /* Don't use NUL as q// delimiter here, this string goes in the
3125 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3128 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3132 PL_perldb = PERLDB_ALL;
3139 forbid_setid('D', FALSE);
3141 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3142 #else /* !DEBUGGING */
3143 if (ckWARN_d(WARN_DEBUGGING))
3144 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3145 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3146 for (s++; isALNUM(*s); s++) ;
3151 usage(PL_origargv[0]);
3154 Safefree(PL_inplace);
3155 #if defined(__CYGWIN__) /* do backup extension automagically */
3156 if (*(s+1) == '\0') {
3157 PL_inplace = savepvs(".bak");
3160 #endif /* __CYGWIN__ */
3162 const char * const start = ++s;
3163 while (*s && !isSPACE(*s))
3166 PL_inplace = savepvn(start, s - start);
3170 if (*s == '-') /* Additional switches on #! line. */
3174 case 'I': /* -I handled both here and in parse_body() */
3175 forbid_setid('I', FALSE);
3177 while (*s && isSPACE(*s))
3182 /* ignore trailing spaces (possibly followed by other switches) */
3184 for (e = p; *e && !isSPACE(*e); e++) ;
3188 } while (*p && *p != '-');
3189 e = savepvn(s, e-s);
3190 incpush(e, TRUE, TRUE, FALSE, FALSE, TRUE);
3197 Perl_croak(aTHX_ "No directory specified for -I");
3203 SvREFCNT_dec(PL_ors_sv);
3209 PL_ors_sv = newSVpvs("\n");
3210 numlen = 3 + (*s == '0');
3211 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3215 if (RsPARA(PL_rs)) {
3216 PL_ors_sv = newSVpvs("\n\n");
3219 PL_ors_sv = newSVsv(PL_rs);
3224 forbid_setid('M', FALSE); /* XXX ? */
3227 forbid_setid('m', FALSE); /* XXX ? */
3232 const char *use = "use ";
3234 /* -M-foo == 'no foo' */
3235 /* Leading space on " no " is deliberate, to make both
3236 possibilities the same length. */
3237 if (*s == '-') { use = " no "; ++s; }
3238 sv = newSVpvn(use,4);
3240 /* We allow -M'Module qw(Foo Bar)' */
3241 while(isALNUM(*s) || *s==':') {
3250 Perl_croak(aTHX_ "Module name required with -%c option",
3253 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3254 "contains single ':'",
3255 (int)(s - start), start, option);
3256 end = s + strlen(s);
3258 sv_catpvn(sv, start, end - start);
3259 if (option == 'm') {
3261 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3262 sv_catpvs( sv, " ()");
3265 sv_catpvn(sv, start, s-start);
3266 /* Use NUL as q''-delimiter. */
3267 sv_catpvs(sv, " split(/,/,q\0");
3269 sv_catpvn(sv, s, end - s);
3270 sv_catpvs(sv, "\0)");
3273 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3276 Perl_croak(aTHX_ "Missing argument to -%c", option);
3287 forbid_setid('s', FALSE);
3288 PL_doswitches = TRUE;
3302 #ifdef MACOS_TRADITIONAL
3303 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3305 PL_do_undump = TRUE;
3313 if (!sv_derived_from(PL_patchlevel, "version"))
3314 upg_version(PL_patchlevel, TRUE);
3316 PerlIO_printf(PerlIO_stdout(),
3317 "\nThis is perl, %"SVf
3319 SVfARG(vstringify(PL_patchlevel)),
3322 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3323 PerlIO_printf(PerlIO_stdout(),
3324 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3325 SVfARG(vstringify(PL_patchlevel))));
3326 PerlIO_printf(PerlIO_stdout(),
3327 Perl_form(aTHX_ " built under %s at %s %s\n",
3328 OSNAME, __DATE__, __TIME__));
3329 PerlIO_printf(PerlIO_stdout(),
3330 Perl_form(aTHX_ " OS Specific Release: %s\n",
3333 #if defined PERL_PATCHNUM
3334 PerlIO_printf(PerlIO_stdout(),"\nCompiled from: %s",STRINGIFY(PERL_PATCHNUM));
3336 #if defined(LOCAL_PATCH_COUNT)
3337 if (LOCAL_PATCH_COUNT > 0)
3338 PerlIO_printf(PerlIO_stdout(),
3339 "\n(with %d registered patch%s, "
3340 "see perl -V for more detail)",
3342 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "\n\nCopyright 1987-2008, Larry Wall\n");
3347 #ifdef MACOS_TRADITIONAL
3348 PerlIO_printf(PerlIO_stdout(),
3349 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3350 "maintained by Chris Nandor\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3359 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3364 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3367 PerlIO_printf(PerlIO_stdout(),
3368 "atariST series port, ++jrb bammi@cadence.com\n");
3371 PerlIO_printf(PerlIO_stdout(),
3372 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3375 PerlIO_printf(PerlIO_stdout(),
3376 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3379 PerlIO_printf(PerlIO_stdout(),
3380 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3383 PerlIO_printf(PerlIO_stdout(),
3384 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3387 PerlIO_printf(PerlIO_stdout(),
3388 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3391 PerlIO_printf(PerlIO_stdout(),
3392 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3395 PerlIO_printf(PerlIO_stdout(),
3396 "MiNT port by Guido Flohr, 1997-1999\n");
3399 PerlIO_printf(PerlIO_stdout(),
3400 "EPOC port by Olaf Flebbe, 1999-2002\n");
3403 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3404 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3407 #ifdef __SYMBIAN32__
3408 PerlIO_printf(PerlIO_stdout(),
3409 "Symbian port by Nokia, 2004-2005\n");
3411 #ifdef BINARY_BUILD_NOTICE
3412 BINARY_BUILD_NOTICE;
3414 PerlIO_printf(PerlIO_stdout(),
3416 Perl may be copied only under the terms of either the Artistic License or the\n\
3417 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3418 Complete documentation for Perl, including FAQ lists, should be found on\n\
3419 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3420 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3423 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3424 PL_dowarn |= G_WARN_ON;
3429 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3430 if (!specialWARN(PL_compiling.cop_warnings))
3431 PerlMemShared_free(PL_compiling.cop_warnings);
3432 PL_compiling.cop_warnings = pWARN_ALL ;
3436 PL_dowarn = G_WARN_ALL_OFF;
3437 if (!specialWARN(PL_compiling.cop_warnings))
3438 PerlMemShared_free(PL_compiling.cop_warnings);
3439 PL_compiling.cop_warnings = pWARN_NONE ;
3446 if (s[0] == '-') /* Additional switches on #! line. */
3451 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3457 #ifdef ALTERNATE_SHEBANG
3458 case 'S': /* OS/2 needs -S on "extproc" line. */
3462 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3467 /* compliments of Tom Christiansen */
3469 /* unexec() can be found in the Gnu emacs distribution */
3470 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3473 Perl_my_unexec(pTHX)
3475 PERL_UNUSED_CONTEXT;
3477 SV * prog = newSVpv(BIN_EXP, 0);
3478 SV * file = newSVpv(PL_origfilename, 0);
3482 sv_catpvs(prog, "/perl");
3483 sv_catpvs(file, ".perldump");
3485 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3486 /* unexec prints msg to stderr in case of failure */
3487 PerlProc_exit(status);
3490 # include <lib$routines.h>
3491 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3492 # elif defined(WIN32) || defined(__CYGWIN__)
3493 Perl_croak(aTHX_ "dump is not supported");
3495 ABORT(); /* for use with undump */
3500 /* initialize curinterp */
3506 # define PERLVAR(var,type)
3507 # define PERLVARA(var,n,type)
3508 # if defined(PERL_IMPLICIT_CONTEXT)
3509 # define PERLVARI(var,type,init) aTHX->var = init;
3510 # define PERLVARIC(var,type,init) aTHX->var = init;
3512 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3513 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3515 # include "intrpvar.h"
3521 # define PERLVAR(var,type)
3522 # define PERLVARA(var,n,type)
3523 # define PERLVARI(var,type,init) PL_##var = init;
3524 # define PERLVARIC(var,type,init) PL_##var = init;
3525 # include "intrpvar.h"
3532 /* As these are inside a structure, PERLVARI isn't capable of initialising
3534 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3535 PL_reg_poscache = PL_reg_starttry = NULL;
3539 S_init_main_stash(pTHX)
3544 PL_curstash = PL_defstash = newHV();
3545 /* We know that the string "main" will be in the global shared string
3546 table, so it's a small saving to use it rather than allocate another
3548 PL_curstname = newSVpvs_share("main");
3549 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3550 /* If we hadn't caused another reference to "main" to be in the shared
3551 string table above, then it would be worth reordering these two,
3552 because otherwise all we do is delete "main" from it as a consequence
3553 of the SvREFCNT_dec, only to add it again with hv_name_set */
3554 SvREFCNT_dec(GvHV(gv));
3555 hv_name_set(PL_defstash, "main", 4, 0);
3556 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3558 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3560 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3561 GvMULTI_on(PL_incgv);
3562 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3563 GvMULTI_on(PL_hintgv);
3564 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3565 SvREFCNT_inc_simple_void(PL_defgv);
3566 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3567 SvREFCNT_inc_simple_void(PL_errgv);
3568 GvMULTI_on(PL_errgv);
3569 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3570 GvMULTI_on(PL_replgv);
3571 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3572 #ifdef PERL_DONT_CREATE_GVSV
3575 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3577 PL_curstash = PL_defstash;
3578 CopSTASH_set(&PL_compiling, PL_defstash);
3579 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3580 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3582 /* We must init $/ before switches are processed. */
3583 sv_setpvs(get_sv("/", TRUE), "\n");
3587 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3588 bool *suidscript, PerlIO **rsfpp)
3593 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3596 PL_origfilename = savepvs("-e");
3599 /* if find_script() returns, it returns a malloc()-ed value */
3600 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3602 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3603 const char *s = scriptname + 8;
3609 * Tell apart "normal" usage of fdscript, e.g.
3610 * with bash on FreeBSD:
3611 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3612 * from usage in suidperl.
3613 * Does any "normal" usage leave garbage after the number???
3614 * Is it a mistake to use a similar /dev/fd/ construct for
3619 * Be supersafe and do some sanity-checks.
3620 * Still, can we be sure we got the right thing?
3623 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3626 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3628 scriptname = savepv(s + 1);
3629 Safefree(PL_origfilename);
3630 PL_origfilename = (char *)scriptname;
3635 CopFILE_free(PL_curcop);
3636 CopFILE_set(PL_curcop, PL_origfilename);
3637 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3638 scriptname = (char *)"";
3639 if (fdscript >= 0) {
3640 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3641 # if defined(HAS_FCNTL) && defined(F_SETFD)
3643 /* ensure close-on-exec */
3644 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3649 Perl_croak(aTHX_ "sperl needs fd script\n"
3650 "You should not call sperl directly; do you need to "
3651 "change a #! line\nfrom sperl to perl?\n");
3654 * Do not open (or do other fancy stuff) while setuid.
3655 * Perl does the open, and hands script to suidperl on a fd;
3656 * suidperl only does some checks, sets up UIDs and re-execs
3657 * perl with that fd as it has always done.
3661 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3664 else if (!*scriptname) {
3665 forbid_setid(0, *suidscript);
3666 *rsfpp = PerlIO_stdin();
3669 #ifdef FAKE_BIT_BUCKET
3670 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3671 * is called) and still have the "-e" work. (Believe it or not,
3672 * a /dev/null is required for the "-e" to work because source
3673 * filter magic is used to implement it. ) This is *not* a general
3674 * replacement for a /dev/null. What we do here is create a temp
3675 * file (an empty file), open up that as the script, and then
3676 * immediately close and unlink it. Close enough for jazz. */
3677 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3678 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3679 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3680 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3681 FAKE_BIT_BUCKET_TEMPLATE
3683 const char * const err = "Failed to create a fake bit bucket";
3684 if (strEQ(scriptname, BIT_BUCKET)) {
3685 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3686 int tmpfd = mkstemp(tmpname);
3688 scriptname = tmpname;
3691 Perl_croak(aTHX_ err);
3694 scriptname = mktemp(tmpname);
3696 Perl_croak(aTHX_ err);
3701 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3702 #ifdef FAKE_BIT_BUCKET
3703 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3704 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3705 && strlen(scriptname) == sizeof(tmpname) - 1) {
3708 scriptname = BIT_BUCKET;
3710 # if defined(HAS_FCNTL) && defined(F_SETFD)
3712 /* ensure close-on-exec */
3713 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3716 #endif /* IAMSUID */
3718 /* PSz 16 Sep 03 Keep neat error message */
3720 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3722 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3723 CopFILE(PL_curcop), Strerror(errno));
3729 * I_SYSSTATVFS HAS_FSTATVFS
3731 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3732 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3733 * here so that metaconfig picks them up. */
3737 S_fd_on_nosuid_fs(pTHX_ int fd)
3740 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3741 * but is needed also on machines without setreuid.
3742 * Seems safe enough to run as root.
3744 int check_okay = 0; /* able to do all the required sys/libcalls */
3745 int on_nosuid = 0; /* the fd is on a nosuid fs */
3747 * Need to check noexec also: nosuid might not be set, the average
3748 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3750 int on_noexec = 0; /* the fd is on a noexec fs */
3753 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3754 * fstatvfs() is UNIX98.
3755 * fstatfs() is 4.3 BSD.
3756 * ustat()+getmnt() is pre-4.3 BSD.
3757 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3758 * an irrelevant filesystem while trying to reach the right one.
3761 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3763 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3764 defined(HAS_FSTATVFS)
3765 # define FD_ON_NOSUID_CHECK_OKAY
3766 struct statvfs stfs;
3768 check_okay = fstatvfs(fd, &stfs) == 0;
3769 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3771 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3772 on platforms where it is present. */
3773 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3775 # endif /* fstatvfs */
3777 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3778 defined(PERL_MOUNT_NOSUID) && \
3779 defined(PERL_MOUNT_NOEXEC) && \
3780 defined(HAS_FSTATFS) && \
3781 defined(HAS_STRUCT_STATFS) && \
3782 defined(HAS_STRUCT_STATFS_F_FLAGS)
3783 # define FD_ON_NOSUID_CHECK_OKAY
3786 check_okay = fstatfs(fd, &stfs) == 0;
3787 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3788 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3789 # endif /* fstatfs */
3791 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3792 defined(PERL_MOUNT_NOSUID) && \
3793 defined(PERL_MOUNT_NOEXEC) && \
3794 defined(HAS_FSTAT) && \
3795 defined(HAS_USTAT) && \
3796 defined(HAS_GETMNT) && \
3797 defined(HAS_STRUCT_FS_DATA) && \
3799 # define FD_ON_NOSUID_CHECK_OKAY
3802 if (fstat(fd, &fdst) == 0) {
3804 if (ustat(fdst.st_dev, &us) == 0) {
3806 /* NOSTAT_ONE here because we're not examining fields which
3807 * vary between that case and STAT_ONE. */
3808 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3809 size_t cmplen = sizeof(us.f_fname);
3810 if (sizeof(fsd.fd_req.path) < cmplen)
3811 cmplen = sizeof(fsd.fd_req.path);
3812 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3813 fdst.st_dev == fsd.fd_req.dev) {
3815 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3816 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3821 # endif /* fstat+ustat+getmnt */
3823 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3824 defined(HAS_GETMNTENT) && \
3825 defined(HAS_HASMNTOPT) && \
3826 defined(MNTOPT_NOSUID) && \
3827 defined(MNTOPT_NOEXEC)
3828 # define FD_ON_NOSUID_CHECK_OKAY
3829 FILE *mtab = fopen("/etc/mtab", "r");
3830 struct mntent *entry;
3833 if (mtab && (fstat(fd, &stb) == 0)) {
3834 while (entry = getmntent(mtab)) {
3835 if (stat(entry->mnt_dir, &fsb) == 0
3836 && fsb.st_dev == stb.st_dev)
3838 /* found the filesystem */
3840 if (hasmntopt(entry, MNTOPT_NOSUID))
3842 if (hasmntopt(entry, MNTOPT_NOEXEC))
3845 } /* A single fs may well fail its stat(). */
3850 # endif /* getmntent+hasmntopt */
3853 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3855 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3857 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3858 return ((!check_okay) || on_nosuid || on_noexec);
3860 #endif /* IAMSUID */
3864 S_validate_suid(pTHX_ const char *validarg,
3866 const char *scriptname,
3872 SV *linestr_sv, PerlIO *rsfp)
3877 PERL_ARGS_ASSERT_VALIDATE_SUID;
3879 /* do we need to emulate setuid on scripts? */
3881 /* This code is for those BSD systems that have setuid #! scripts disabled
3882 * in the kernel because of a security problem. Merely defining DOSUID
3883 * in perl will not fix that problem, but if you have disabled setuid
3884 * scripts in the kernel, this will attempt to emulate setuid and setgid
3885 * on scripts that have those now-otherwise-useless bits set. The setuid
3886 * root version must be called suidperl or sperlN.NNN. If regular perl
3887 * discovers that it has opened a setuid script, it calls suidperl with
3888 * the same argv that it had. If suidperl finds that the script it has
3889 * just opened is NOT setuid root, it sets the effective uid back to the
3890 * uid. We don't just make perl setuid root because that loses the
3891 * effective uid we had before invoking perl, if it was different from the
3894 * Description/comments above do not match current workings:
3895 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3896 * suidperl called with script open and name changed to /dev/fd/N/X;
3897 * suidperl croaks if script is not setuid;
3898 * making perl setuid would be a huge security risk (and yes, that
3899 * would lose any euid we might have had).
3901 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3902 * be defined in suidperl only. suidperl must be setuid root. The
3903 * Configure script will set this up for you if you want it.
3906 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3907 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3908 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3910 const char *linestr;
3914 if (fdscript < 0 || !suidscript)
3915 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3917 * Since the script is opened by perl, not suidperl, some of these
3918 * checks are superfluous. Leaving them in probably does not lower
3922 * Do checks even for systems with no HAS_SETREUID.
3923 * We used to swap, then re-swap UIDs with
3924 # ifdef HAS_SETREUID
3925 if (setreuid(PL_euid,PL_uid) < 0
3926 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3927 Perl_croak(aTHX_ "Can't swap uid and euid");
3929 # ifdef HAS_SETREUID
3930 if (setreuid(PL_uid,PL_euid) < 0
3931 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3932 Perl_croak(aTHX_ "Can't reswap uid and euid");
3936 /* On this access check to make sure the directories are readable,
3937 * there is actually a small window that the user could use to make
3938 * filename point to an accessible directory. So there is a faint
3939 * chance that someone could execute a setuid script down in a
3940 * non-accessible directory. I don't know what to do about that.
3941 * But I don't think it's too important. The manual lies when
3942 * it says access() is useful in setuid programs.
3944 * So, access() is pretty useless... but not harmful... do anyway.
3946 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3947 Perl_croak(aTHX_ "Can't access() script\n");
3950 /* If we can swap euid and uid, then we can determine access rights
3951 * with a simple stat of the file, and then compare device and
3952 * inode to make sure we did stat() on the same file we opened.
3953 * Then we just have to make sure he or she can execute it.
3956 * As the script is opened by perl, not suidperl, we do not need to
3957 * care much about access rights.
3959 * The 'script changed' check is needed, or we can get lied to
3960 * about $0 with e.g.
3961 * suidperl /dev/fd/4//bin/x 4<setuidscript
3962 * Without HAS_SETREUID, is it safe to stat() as root?
3964 * Are there any operating systems that pass /dev/fd/xxx for setuid
3965 * scripts, as suggested/described in perlsec(1)? Surely they do not
3966 * pass the script name as we do, so the "script changed" test would
3967 * fail for them... but we never get here with
3968 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3970 * This is one place where we must "lie" about return status: not
3971 * say if the stat() failed. We are doing this as root, and could
3972 * be tricked into reporting existence or not of files that the
3973 * "plain" user cannot even see.
3977 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3978 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3979 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3980 Perl_croak(aTHX_ "Setuid script changed\n");
3984 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3985 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3988 * We used to do this check as the "plain" user (after swapping
3989 * UIDs). But the check for nosuid and noexec filesystem is needed,
3990 * and should be done even without HAS_SETREUID. (Maybe those
3991 * operating systems do not have such mount options anyway...)
3992 * Seems safe enough to do as root.
3994 # if !defined(NO_NOSUID_CHECK)
3995 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3996 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3999 # endif /* IAMSUID */
4001 if (!S_ISREG(PL_statbuf.st_mode)) {
4002 Perl_croak(aTHX_ "Setuid script not plain file\n");
4004 if (PL_statbuf.st_mode & S_IWOTH)
4005 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4006 PL_doswitches = FALSE; /* -s is insecure in suid */
4007 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4008 CopLINE_inc(PL_curcop);
4009 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4010 Perl_croak(aTHX_ "No #! line");
4011 linestr = SvPV_nolen_const(linestr_sv);
4012 /* required even on Sys V */
4013 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4014 Perl_croak(aTHX_ "No #! line");
4018 /* Sanity check on line length */
4019 s_end = s + strlen(s);
4020 if (s_end == s || (s_end - s) > 4000)
4021 Perl_croak(aTHX_ "Very long #! line");
4022 /* Allow more than a single space after #! */
4023 while (isSPACE(*s)) s++;
4024 /* Sanity check on buffer end */
4025 while ((*s) && !isSPACE(*s)) s++;
4026 for (s2 = s; (s2 > linestr &&
4027 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4028 || s2[-1] == '-')); s2--) ;
4029 /* Sanity check on buffer start */
4030 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4031 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4032 Perl_croak(aTHX_ "Not a perl script");
4033 while (*s == ' ' || *s == '\t') s++;
4035 * #! arg must be what we saw above. They can invoke it by
4036 * mentioning suidperl explicitly, but they may not add any strange
4037 * arguments beyond what #! says if they do invoke suidperl that way.
4040 * The way validarg was set up, we rely on the kernel to start
4041 * scripts with argv[1] set to contain all #! line switches (the
4045 * Check that we got all the arguments listed in the #! line (not
4046 * just that there are no extraneous arguments). Might not matter
4047 * much, as switches from #! line seem to be acted upon (also), and
4048 * so may be checked and trapped in perl. But, security checks must
4049 * be done in suidperl and not deferred to perl. Note that suidperl
4050 * does not get around to parsing (and checking) the switches on
4051 * the #! line (but execs perl sooner).
4052 * Allow (require) a trailing newline (which may be of two
4053 * characters on some architectures?) (but no other trailing
4056 len = strlen(validarg);
4057 if (strEQ(validarg," PHOOEY ") ||
4058 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4059 !((s_end - s) == len+1
4060 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4061 Perl_croak(aTHX_ "Args must match #! line");
4065 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4066 PL_euid == PL_statbuf.st_uid)
4068 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4069 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4070 # endif /* IAMSUID */
4073 PL_euid) { /* oops, we're not the setuid root perl */
4075 * When root runs a setuid script, we do not go through the same
4076 * steps of execing sperl and then perl with fd scripts, but
4077 * simply set up UIDs within the same perl invocation; so do
4078 * not have the same checks (on options, whatever) that we have
4079 * for plain users. No problem really: would have to be a script
4080 * that does not actually work for plain users; and if root is
4081 * foolish and can be persuaded to run such an unsafe script, he
4082 * might run also non-setuid ones, and deserves what he gets.
4084 * Or, we might drop the PL_euid check above (and rely just on
4085 * fdscript to avoid loops), and do the execs
4091 * Pass fd script to suidperl.
4092 * Exec suidperl, substituting fd script for scriptname.
4093 * Pass script name as "subdir" of fd, which perl will grok;
4094 * in fact will use that to distinguish this from "normal"
4095 * usage, see comments above.
4097 PerlIO_rewind(rsfp);
4098 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4099 /* PSz 27 Feb 04 Sanity checks on scriptname */
4100 if ((!scriptname) || (!*scriptname) ) {
4101 Perl_croak(aTHX_ "No setuid script name\n");
4103 if (*scriptname == '-') {
4104 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4105 /* Or we might confuse it with an option when replacing
4106 * name in argument list, below (though we do pointer, not
4107 * string, comparisons).
4110 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4111 if (!PL_origargv[which]) {
4112 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4114 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4115 PerlIO_fileno(rsfp), PL_origargv[which]));
4116 # if defined(HAS_FCNTL) && defined(F_SETFD)
4117 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4120 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4121 (int)PERL_REVISION, (int)PERL_VERSION,
4122 (int)PERL_SUBVERSION), PL_origargv);
4124 # endif /* IAMSUID */
4125 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4128 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4130 * This seems back to front: we try HAS_SETEGID first; if not available
4131 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4132 * in the sense that we only want to set EGID; but are there any machines
4133 * with either of the latter, but not the former? Same with UID, later.
4136 (void)setegid(PL_statbuf.st_gid);
4138 # ifdef HAS_SETREGID
4139 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4141 # ifdef HAS_SETRESGID
4142 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4144 PerlProc_setgid(PL_statbuf.st_gid);
4148 if (PerlProc_getegid() != PL_statbuf.st_gid)
4149 Perl_croak(aTHX_ "Can't do setegid!\n");
4151 if (PL_statbuf.st_mode & S_ISUID) {
4152 if (PL_statbuf.st_uid != PL_euid)
4154 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4156 # ifdef HAS_SETREUID
4157 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4159 # ifdef HAS_SETRESUID
4160 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4162 PerlProc_setuid(PL_statbuf.st_uid);
4166 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4167 Perl_croak(aTHX_ "Can't do seteuid!\n");
4169 else if (PL_uid) { /* oops, mustn't run as root */
4171 (void)seteuid((Uid_t)PL_uid);
4173 # ifdef HAS_SETREUID
4174 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4176 # ifdef HAS_SETRESUID
4177 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4179 PerlProc_setuid((Uid_t)PL_uid);
4183 if (PerlProc_geteuid() != PL_uid)
4184 Perl_croak(aTHX_ "Can't do seteuid!\n");
4187 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4188 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4191 else if (fdscript < 0 || !suidscript)
4192 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4193 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4195 /* PSz 16 Sep 03 Keep neat error message */
4196 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4199 /* We absolutely must clear out any saved ids here, so we */
4200 /* exec the real perl, substituting fd script for scriptname. */
4201 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4203 * It might be thought that using setresgid and/or setresuid (changed to
4204 * set the saved IDs) above might obviate the need to exec, and we could
4205 * go on to "do the perl thing".
4207 * Is there such a thing as "saved GID", and is that set for setuid (but
4208 * not setgid) execution like suidperl? Without exec, it would not be
4209 * cleared for setuid (but not setgid) scripts (or might need a dummy
4212 * We need suidperl to do the exact same argument checking that perl
4213 * does. Thus it cannot be very small; while it could be significantly
4214 * smaller, it is safer (simpler?) to make it essentially the same
4215 * binary as perl (but they are not identical). - Maybe could defer that
4216 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4217 * but prefer to do thorough checks in suidperl itself. Such deferral
4218 * would make suidperl security rely on perl, a design no-no.
4220 * Setuid things should be short and simple, thus easy to understand and
4221 * verify. They should do their "own thing", without influence by
4222 * attackers. It may help if their internal execution flow is fixed,
4223 * regardless of platform: it may be best to exec anyway.
4225 * Suidperl should at least be conceptually simple: a wrapper only,
4226 * never to do any real perl. Maybe we should put
4228 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4230 * into the perly bits.
4232 PerlIO_rewind(rsfp);
4233 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4235 * Keep original arguments: suidperl already has fd script.
4237 # if defined(HAS_FCNTL) && defined(F_SETFD)
4238 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4241 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4242 (int)PERL_REVISION, (int)PERL_VERSION,
4243 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4245 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4246 # endif /* IAMSUID */
4251 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4252 /* Don't even need this function. */
4255 S_validate_suid(pTHX_ PerlIO *rsfp)
4257 PERL_ARGS_ASSERT_VALIDATE_SUID;
4259 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4260 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4263 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4264 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4266 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4269 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4270 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4271 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4272 /* not set-id, must be wrapped */
4275 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4279 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4283 register const char *s2;
4284 #ifdef MACOS_TRADITIONAL
4288 PERL_ARGS_ASSERT_FIND_BEGINNING;
4290 /* skip forward in input to the real script? */
4292 #ifdef MACOS_TRADITIONAL
4293 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4295 while (PL_doextract || gMacPerl_AlwaysExtract) {
4296 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4297 if (!gMacPerl_AlwaysExtract)
4298 Perl_croak(aTHX_ "No Perl script found in input\n");
4300 if (PL_doextract) /* require explicit override ? */
4301 if (!OverrideExtract(PL_origfilename))
4302 Perl_croak(aTHX_ "User aborted script\n");
4304 PL_doextract = FALSE;
4306 /* Pater peccavi, file does not have #! */
4307 PerlIO_rewind(rsfp);
4312 while (PL_doextract) {
4313 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4314 Perl_croak(aTHX_ "No Perl script found in input\n");
4317 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4318 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4319 PL_doextract = FALSE;
4320 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4322 while (*s == ' ' || *s == '\t') s++;
4324 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4325 || s2[-1] == '_') s2--;
4326 if (strnEQ(s2-4,"perl",4))
4327 while ((s = moreswitches(s)))
4330 #ifdef MACOS_TRADITIONAL
4331 /* We are always searching for the #!perl line in MacPerl,
4332 * so if we find it, still keep the line count correct
4333 * by counting lines we already skipped over
4335 for (; maclines > 0 ; maclines--)
4336 PerlIO_ungetc(rsfp, '\n');
4340 /* gMacPerl_AlwaysExtract is false in MPW tool */
4341 } else if (gMacPerl_AlwaysExtract) {
4353 PL_uid = PerlProc_getuid();
4354 PL_euid = PerlProc_geteuid();
4355 PL_gid = PerlProc_getgid();
4356 PL_egid = PerlProc_getegid();
4358 PL_uid |= PL_gid << 16;
4359 PL_euid |= PL_egid << 16;
4361 /* Should not happen: */
4362 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4363 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4366 * Should go by suidscript, not uid!=euid: why disallow
4367 * system("ls") in scripts run from setuid things?
4368 * Or, is this run before we check arguments and set suidscript?
4369 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4370 * (We never have suidscript, can we be sure to have fdscript?)
4371 * Or must then go by UID checks? See comments in forbid_setid also.
4375 /* This is used very early in the lifetime of the program,
4376 * before even the options are parsed, so PL_tainting has
4377 * not been initialized properly. */
4379 Perl_doing_taint(int argc, char *argv[], char *envp[])
4381 #ifndef PERL_IMPLICIT_SYS
4382 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4383 * before we have an interpreter-- and the whole point of this
4384 * function is to be called at such an early stage. If you are on
4385 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4386 * "tainted because running with altered effective ids', you'll
4387 * have to add your own checks somewhere in here. The two most
4388 * known samples of 'implicitness' are Win32 and NetWare, neither
4389 * of which has much of concept of 'uids'. */
4390 int uid = PerlProc_getuid();
4391 int euid = PerlProc_geteuid();
4392 int gid = PerlProc_getgid();
4393 int egid = PerlProc_getegid();
4400 if (uid && (euid != uid || egid != gid))
4402 #endif /* !PERL_IMPLICIT_SYS */
4403 /* This is a really primitive check; environment gets ignored only
4404 * if -T are the first chars together; otherwise one gets
4405 * "Too late" message. */
4406 if ( argc > 1 && argv[1][0] == '-'
4407 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4412 /* Passing the flag as a single char rather than a string is a slight space
4413 optimisation. The only message that isn't /^-.$/ is
4414 "program input from stdin", which is substituted in place of '\0', which
4415 could never be a command line flag. */
4417 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4420 char string[3] = "-x";
4421 const char *message = "program input from stdin";
4428 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4429 if (PL_euid != PL_uid)
4430 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4431 if (PL_egid != PL_gid)
4432 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4433 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4435 * Checks for UID/GID above "wrong": why disallow
4436 * perl -e 'print "Hello\n"'
4437 * from within setuid things?? Simply drop them: replaced by
4438 * fdscript/suidscript and #ifdef IAMSUID checks below.
4440 * This may be too late for command-line switches. Will catch those on
4441 * the #! line, after finding the script name and setting up
4442 * fdscript/suidscript. Note that suidperl does not get around to
4443 * parsing (and checking) the switches on the #! line, but checks that
4444 * the two sets are identical.
4446 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4447 * instead, or would that be "too late"? (We never have suidscript, can
4448 * we be sure to have fdscript?)
4450 * Catch things with suidscript (in descendant of suidperl), even with
4451 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4452 * below; but I am paranoid.
4454 * Also see comments about root running a setuid script, elsewhere.
4457 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4459 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4460 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4461 #endif /* IAMSUID */
4465 Perl_init_debugger(pTHX)
4468 HV * const ostash = PL_curstash;
4470 PL_curstash = PL_debstash;
4471 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4473 AvREAL_off(PL_dbargs);
4474 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4475 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4476 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4477 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4478 sv_setiv(PL_DBsingle, 0);
4479 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4480 sv_setiv(PL_DBtrace, 0);
4481 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4482 sv_setiv(PL_DBsignal, 0);
4483 PL_curstash = ostash;
4486 #ifndef STRESS_REALLOC
4487 #define REASONABLE(size) (size)
4489 #define REASONABLE(size) (1) /* unreasonable */
4493 Perl_init_stacks(pTHX)
4496 /* start with 128-item stack and 8K cxstack */
4497 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4498 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4499 PL_curstackinfo->si_type = PERLSI_MAIN;
4500 PL_curstack = PL_curstackinfo->si_stack;
4501 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4503 PL_stack_base = AvARRAY(PL_curstack);
4504 PL_stack_sp = PL_stack_base;
4505 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4507 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4510 PL_tmps_max = REASONABLE(128);
4512 Newx(PL_markstack,REASONABLE(32),I32);
4513 PL_markstack_ptr = PL_markstack;
4514 PL_markstack_max = PL_markstack + REASONABLE(32);
4518 Newx(PL_scopestack,REASONABLE(32),I32);
4519 PL_scopestack_ix = 0;
4520 PL_scopestack_max = REASONABLE(32);
4522 Newx(PL_savestack,REASONABLE(128),ANY);
4523 PL_savestack_ix = 0;
4524 PL_savestack_max = REASONABLE(128);
4533 while (PL_curstackinfo->si_next)
4534 PL_curstackinfo = PL_curstackinfo->si_next;
4535 while (PL_curstackinfo) {
4536 PERL_SI *p = PL_curstackinfo->si_prev;
4537 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4538 Safefree(PL_curstackinfo->si_cxstack);
4539 Safefree(PL_curstackinfo);
4540 PL_curstackinfo = p;
4542 Safefree(PL_tmps_stack);
4543 Safefree(PL_markstack);
4544 Safefree(PL_scopestack);
4545 Safefree(PL_savestack);
4550 S_init_predump_symbols(pTHX)
4556 sv_setpvs(get_sv("\"", TRUE), " ");
4557 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4559 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4560 GvMULTI_on(PL_stdingv);
4561 io = GvIOp(PL_stdingv);
4562 IoTYPE(io) = IoTYPE_RDONLY;
4563 IoIFP(io) = PerlIO_stdin();
4564 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4566 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4568 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4571 IoTYPE(io) = IoTYPE_WRONLY;
4572 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4574 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4576 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4578 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4579 GvMULTI_on(PL_stderrgv);
4580 io = GvIOp(PL_stderrgv);
4581 IoTYPE(io) = IoTYPE_WRONLY;
4582 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4583 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4585 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4587 PL_statname = newSV(0); /* last filename we did stat on */
4589 Safefree(PL_osname);
4590 PL_osname = savepv(OSNAME);
4594 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4598 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4600 argc--,argv++; /* skip name of script */
4601 if (PL_doswitches) {
4602 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4606 if (argv[0][1] == '-' && !argv[0][2]) {
4610 if ((s = strchr(argv[0], '='))) {
4611 const char *const start_name = argv[0] + 1;
4612 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4613 TRUE, SVt_PV)), s + 1);
4616 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4619 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4620 GvMULTI_on(PL_argvgv);
4621 (void)gv_AVadd(PL_argvgv);
4622 av_clear(GvAVn(PL_argvgv));
4623 for (; argc > 0; argc--,argv++) {
4624 SV * const sv = newSVpv(argv[0],0);
4625 av_push(GvAVn(PL_argvgv),sv);
4626 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4627 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4630 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4631 (void)sv_utf8_decode(sv);
4637 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4642 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4644 PL_toptarget = newSV_type(SVt_PVFM);
4645 sv_setpvs(PL_toptarget, "");
4646 PL_bodytarget = newSV_type(SVt_PVFM);
4647 sv_setpvs(PL_bodytarget, "");
4648 PL_formtarget = PL_bodytarget;
4652 init_argv_symbols(argc,argv);
4654 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4655 #ifdef MACOS_TRADITIONAL
4656 /* $0 is not majick on a Mac */
4657 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4659 sv_setpv(GvSV(tmpgv),PL_origfilename);
4661 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4663 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4667 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4669 bool env_is_not_environ;
4670 GvMULTI_on(PL_envgv);
4671 hv = GvHVn(PL_envgv);
4672 hv_magic(hv, NULL, PERL_MAGIC_env);
4674 #ifdef USE_ENVIRON_ARRAY
4675 /* Note that if the supplied env parameter is actually a copy
4676 of the global environ then it may now point to free'd memory
4677 if the environment has been modified since. To avoid this
4678 problem we treat env==NULL as meaning 'use the default'
4682 env_is_not_environ = env != environ;
4683 if (env_is_not_environ
4684 # ifdef USE_ITHREADS
4685 && PL_curinterp == aTHX
4694 for (; *env; env++) {
4697 if (!(s = strchr(old_var,'=')) || s == old_var)
4700 #if defined(MSDOS) && !defined(DJGPP)
4702 (void)strupr(old_var);
4705 sv = newSVpv(s+1, 0);
4706 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4707 if (env_is_not_environ)
4711 #endif /* USE_ENVIRON_ARRAY */
4712 #endif /* !PERL_MICRO */
4715 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4716 SvREADONLY_off(GvSV(tmpgv));
4717 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4718 SvREADONLY_on(GvSV(tmpgv));
4720 #ifdef THREADS_HAVE_PIDS
4721 PL_ppid = (IV)getppid();
4724 /* touch @F array to prevent spurious warnings 20020415 MJD */
4726 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4731 S_init_perllib(pTHX)
4737 s = PerlEnv_getenv("PERL5LIB");
4739 * It isn't possible to delete an environment variable with
4740 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4741 * case we treat PERL5LIB as undefined if it has a zero-length value.
4743 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4744 if (s && *s != '\0')
4748 incpush(s, TRUE, TRUE, TRUE, FALSE, FALSE);
4750 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE, FALSE);
4752 /* Treat PERL5?LIB as a possible search list logical name -- the
4753 * "natural" VMS idiom for a Unix path string. We allow each
4754 * element to be a set of |-separated directories for compatibility.
4758 if (my_trnlnm("PERL5LIB",buf,0))
4759 do { incpush(buf,TRUE,TRUE,TRUE,FALSE, FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4761 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE, FALSE);
4765 /* Use the ~-expanded versions of APPLLIB (undocumented),
4766 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4769 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE, FALSE);
4773 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4775 #ifdef MACOS_TRADITIONAL
4778 SV * privdir = newSV(0);
4779 char * macperl = PerlEnv_getenv("MACPERL");
4784 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4785 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4786 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4787 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4788 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4789 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4791 SvREFCNT_dec(privdir);
4794 incpush(":", FALSE, FALSE, FALSE, FALSE, FALSE);
4797 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4800 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4802 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4806 /* sitearch is always relative to sitelib on Windows for
4807 * DLL-based path intuition to work correctly */
4808 # if !defined(WIN32)
4809 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4815 /* this picks up sitearch as well */
4816 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4818 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4822 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4823 /* Search for version-specific dirs below here */
4824 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4827 #ifdef PERL_VENDORARCH_EXP
4828 /* vendorarch is always relative to vendorlib on Windows for
4829 * DLL-based path intuition to work correctly */
4830 # if !defined(WIN32)
4831 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4835 #ifdef PERL_VENDORLIB_EXP
4837 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE); /* this picks up vendorarch as well */
4839 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4843 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4844 /* Search for version-specific dirs below here */
4845 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4848 #ifdef PERL_OTHERLIBDIRS
4849 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE, FALSE);
4853 incpush(".", FALSE, FALSE, FALSE, FALSE, FALSE);
4854 #endif /* MACOS_TRADITIONAL */
4857 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4858 # define PERLLIB_SEP ';'
4861 # define PERLLIB_SEP '|'
4863 # if defined(MACOS_TRADITIONAL)
4864 # define PERLLIB_SEP ','
4866 # define PERLLIB_SEP ':'
4870 #ifndef PERLLIB_MANGLE
4871 # define PERLLIB_MANGLE(s,n) (s)
4874 /* Push a directory onto @INC if it exists.
4875 Generate a new SV if we do this, to save needing to copy the SV we push
4878 S_incpush_if_exists(pTHX_ SV *dir)
4883 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4885 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4886 S_ISDIR(tmpstatbuf.st_mode)) {
4887 av_push(GvAVn(PL_incgv), dir);
4894 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4895 bool canrelocate, bool unshift)
4899 const char *p = dir;
4904 if (addsubdirs || addoldvers) {
4908 /* Break at all separators */
4910 SV *libdir = newSV(0);
4913 /* skip any consecutive separators */
4915 while ( *p == PERLLIB_SEP ) {
4916 /* Uncomment the next line for PATH semantics */
4917 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4922 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4923 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4928 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4929 p = NULL; /* break out */
4931 #ifdef MACOS_TRADITIONAL
4932 if (!strchr(SvPVX(libdir), ':')) {
4935 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4937 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4938 sv_catpvs(libdir, ":");
4941 /* Do the if() outside the #ifdef to avoid warnings about an unused
4944 #ifdef PERL_RELOCATABLE_INC
4946 * Relocatable include entries are marked with a leading .../
4949 * 0: Remove that leading ".../"
4950 * 1: Remove trailing executable name (anything after the last '/')
4951 * from the perl path to give a perl prefix
4953 * While the @INC element starts "../" and the prefix ends with a real
4954 * directory (ie not . or ..) chop that real directory off the prefix
4955 * and the leading "../" from the @INC element. ie a logical "../"
4957 * Finally concatenate the prefix and the remainder of the @INC element
4958 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4959 * generates /usr/local/lib/perl5
4961 const char *libpath = SvPVX(libdir);
4962 STRLEN libpath_len = SvCUR(libdir);
4963 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4965 SV * const caret_X = get_sv("\030", 0);
4966 /* Going to use the SV just as a scratch buffer holding a C
4972 /* $^X is *the* source of taint if tainting is on, hence
4973 SvPOK() won't be true. */
4975 assert(SvPOKp(caret_X));
4976 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4978 /* Firstly take off the leading .../
4979 If all else fail we'll do the paths relative to the current
4981 sv_chop(libdir, libpath + 4);
4982 /* Don't use SvPV as we're intentionally bypassing taining,
4983 mortal copies that the mg_get of tainting creates, and
4984 corruption that seems to come via the save stack.
4985 I guess that the save stack isn't correctly set up yet. */
4986 libpath = SvPVX(libdir);
4987 libpath_len = SvCUR(libdir);
4989 /* This would work more efficiently with memrchr, but as it's
4990 only a GNU extension we'd need to probe for it and
4991 implement our own. Not hard, but maybe not worth it? */
4993 prefix = SvPVX(prefix_sv);
4994 lastslash = strrchr(prefix, '/');
4996 /* First time in with the *lastslash = '\0' we just wipe off
4997 the trailing /perl from (say) /usr/foo/bin/perl
5001 while ((*lastslash = '\0'), /* Do that, come what may. */
5002 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5003 && (lastslash = strrchr(prefix, '/')))) {
5004 if (lastslash[1] == '\0'
5005 || (lastslash[1] == '.'
5006 && (lastslash[2] == '/' /* ends "/." */
5007 || (lastslash[2] == '/'
5008 && lastslash[3] == '/' /* or "/.." */
5010 /* Prefix ends "/" or "/." or "/..", any of which
5011 are fishy, so don't do any more logical cleanup.
5015 /* Remove leading "../" from path */
5018 /* Next iteration round the loop removes the last
5019 directory name from prefix by writing a '\0' in
5020 the while clause. */
5022 /* prefix has been terminated with a '\0' to the correct
5023 length. libpath points somewhere into the libdir SV.
5024 We need to join the 2 with '/' and drop the result into
5026 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5027 SvREFCNT_dec(libdir);
5028 /* And this is the new libdir. */
5031 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5032 /* Need to taint reloccated paths if running set ID */
5033 SvTAINTED_on(libdir);
5036 SvREFCNT_dec(prefix_sv);
5041 * BEFORE pushing libdir onto @INC we may first push version- and
5042 * archname-specific sub-directories.
5044 if (addsubdirs || addoldvers) {
5045 #ifdef PERL_INC_VERSION_LIST
5046 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5047 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5048 const char * const *incver;
5054 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5056 while (unix[len-1] == '/') len--; /* Cosmetic */
5057 sv_usepvn(libdir,unix,len);
5060 PerlIO_printf(Perl_error_log,
5061 "Failed to unixify @INC element \"%s\"\n",
5065 #ifdef MACOS_TRADITIONAL
5066 #define PERL_AV_SUFFIX_FMT ""
5067 #define PERL_ARCH_FMT "%s:"
5068 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5070 #define PERL_AV_SUFFIX_FMT "/"
5071 #define PERL_ARCH_FMT "/%s"
5072 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5074 /* .../version/archname if -d .../version/archname */
5075 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5077 (int)PERL_REVISION, (int)PERL_VERSION,
5078 (int)PERL_SUBVERSION, ARCHNAME);
5079 subdir = S_incpush_if_exists(aTHX_ subdir);
5081 /* .../version if -d .../version */
5082 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5084 (int)PERL_REVISION, (int)PERL_VERSION,
5085 (int)PERL_SUBVERSION);
5086 subdir = S_incpush_if_exists(aTHX_ subdir);
5088 /* .../archname if -d .../archname */
5089 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5090 SVfARG(libdir), ARCHNAME);
5091 subdir = S_incpush_if_exists(aTHX_ subdir);
5095 #ifdef PERL_INC_VERSION_LIST
5097 for (incver = incverlist; *incver; incver++) {
5098 /* .../xxx if -d .../xxx */
5099 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5100 SVfARG(libdir), *incver);
5101 subdir = S_incpush_if_exists(aTHX_ subdir);
5107 /* finally add this lib directory at the end of @INC */
5109 av_unshift( GvAVn( PL_incgv ), 1 );
5110 av_store( GvAVn( PL_incgv ), 0, libdir );
5113 av_push(GvAVn(PL_incgv), libdir);
5117 assert (SvREFCNT(subdir) == 1);
5118 SvREFCNT_dec(subdir);
5124 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5128 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5134 PERL_ARGS_ASSERT_CALL_LIST;
5136 while (av_len(paramList) >= 0) {
5137 cv = MUTABLE_CV(av_shift(paramList));
5139 if (paramList == PL_beginav) {
5140 /* save PL_beginav for compiler */
5141 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5143 else if (paramList == PL_checkav) {
5144 /* save PL_checkav for compiler */
5145 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5147 else if (paramList == PL_unitcheckav) {
5148 /* save PL_unitcheckav for compiler */
5149 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5160 PL_madskills |= 16384;
5165 PL_madskills &= ~16384;
5168 (void)SvPV_const(atsv, len);
5170 PL_curcop = &PL_compiling;
5171 CopLINE_set(PL_curcop, oldline);
5172 if (paramList == PL_beginav)
5173 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5175 Perl_sv_catpvf(aTHX_ atsv,
5176 "%s failed--call queue aborted",
5177 paramList == PL_checkav ? "CHECK"
5178 : paramList == PL_initav ? "INIT"
5179 : paramList == PL_unitcheckav ? "UNITCHECK"
5181 while (PL_scopestack_ix > oldscope)
5184 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5191 /* my_exit() was called */
5192 while (PL_scopestack_ix > oldscope)
5195 PL_curstash = PL_defstash;
5196 PL_curcop = &PL_compiling;
5197 CopLINE_set(PL_curcop, oldline);
5199 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5200 if (paramList == PL_beginav)
5201 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5203 Perl_croak(aTHX_ "%s failed--call queue aborted",
5204 paramList == PL_checkav ? "CHECK"
5205 : paramList == PL_initav ? "INIT"
5206 : paramList == PL_unitcheckav ? "UNITCHECK"
5213 PL_curcop = &PL_compiling;
5214 CopLINE_set(PL_curcop, oldline);
5217 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5226 Perl_my_exit(pTHX_ U32 status)
5237 STATUS_EXIT_SET(status);
5244 Perl_my_failure_exit(pTHX)
5248 /* We have been called to fall on our sword. The desired exit code
5249 * should be already set in STATUS_UNIX, but could be shifted over
5250 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5253 * If an error code has not been set, then force the issue.
5255 if (MY_POSIX_EXIT) {
5257 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5258 * the exit code when there isn't an error.
5261 if (STATUS_UNIX == 0)
5262 STATUS_UNIX_EXIT_SET(255);
5264 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5266 /* The exit code could have been set by $? or vmsish which
5267 * means that it may not be fatal. So convert
5268 * success/warning codes to fatal.
5270 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5271 STATUS_UNIX_EXIT_SET(255);
5275 /* Traditionally Perl on VMS always expects a Fatal Error. */
5276 if (vaxc$errno & 1) {
5278 /* So force success status to failure */
5279 if (STATUS_NATIVE & 1)
5284 STATUS_UNIX = EINTR; /* In case something cares */
5289 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5291 /* Encode the severity code */
5292 severity = STATUS_NATIVE & STS$M_SEVERITY;
5293 STATUS_UNIX = (severity ? severity : 1) << 8;
5295 /* Perl expects this to be a fatal error */
5296 if (severity != STS$K_SEVERE)
5305 STATUS_UNIX_SET(errno);
5307 exitstatus = STATUS_UNIX >> 8;
5308 if (exitstatus & 255)
5309 STATUS_UNIX_SET(exitstatus);
5311 STATUS_UNIX_SET(255);
5318 S_my_exit_jump(pTHX)
5323 SvREFCNT_dec(PL_e_script);
5327 POPSTACK_TO(PL_mainstack);
5335 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5338 const char * const p = SvPVX_const(PL_e_script);
5339 const char *nl = strchr(p, '\n');
5341 PERL_UNUSED_ARG(idx);
5342 PERL_UNUSED_ARG(maxlen);
5344 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5346 filter_del(read_e_script);
5349 sv_catpvn(buf_sv, p, nl-p);
5350 sv_chop(PL_e_script, nl);
5356 * c-indentation-style: bsd
5358 * indent-tabs-mode: t
5361 * ex: set ts=8 sts=4 sw=4 noet: