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;
468 =for apidoc nothreadhook
470 Stub that provides thread hook for perl_destruct when there are
477 Perl_nothreadhook(pTHX)
483 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
485 Perl_dump_sv_child(pTHX_ SV *sv)
488 const int sock = PL_dumper_fd;
489 const int debug_fd = PerlIO_fileno(Perl_debug_log);
490 union control_un control;
493 struct cmsghdr *cmptr;
495 unsigned char buffer[256];
497 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
499 if(sock == -1 || debug_fd == -1)
502 PerlIO_flush(Perl_debug_log);
504 /* All these shenanigans are to pass a file descriptor over to our child for
505 it to dump out to. We can't let it hold open the file descriptor when it
506 forks, as the file descriptor it will dump to can turn out to be one end
507 of pipe that some other process will wait on for EOF. (So as it would
508 be open, the wait would be forever.) */
510 msg.msg_control = control.control;
511 msg.msg_controllen = sizeof(control.control);
512 /* We're a connected socket so we don't need a destination */
518 cmptr = CMSG_FIRSTHDR(&msg);
519 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
520 cmptr->cmsg_level = SOL_SOCKET;
521 cmptr->cmsg_type = SCM_RIGHTS;
522 *((int *)CMSG_DATA(cmptr)) = 1;
524 vec[0].iov_base = (void*)&sv;
525 vec[0].iov_len = sizeof(sv);
526 got = sendmsg(sock, &msg, 0);
529 perror("Debug leaking scalars parent sendmsg failed");
532 if(got < sizeof(sv)) {
533 perror("Debug leaking scalars parent short sendmsg");
537 /* Return protocol is
539 unsigned char: length of location string (0 for empty)
540 unsigned char*: string (not terminated)
542 vec[0].iov_base = (void*)&returned_errno;
543 vec[0].iov_len = sizeof(returned_errno);
544 vec[1].iov_base = buffer;
547 got = readv(sock, vec, 2);
550 perror("Debug leaking scalars parent read failed");
551 PerlIO_flush(PerlIO_stderr());
554 if(got < sizeof(returned_errno) + 1) {
555 perror("Debug leaking scalars parent short read");
556 PerlIO_flush(PerlIO_stderr());
561 got = read(sock, buffer + 1, *buffer);
563 perror("Debug leaking scalars parent read 2 failed");
564 PerlIO_flush(PerlIO_stderr());
569 perror("Debug leaking scalars parent short read 2");
570 PerlIO_flush(PerlIO_stderr());
575 if (returned_errno || *buffer) {
576 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
577 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
578 returned_errno, strerror(returned_errno));
584 =for apidoc perl_destruct
586 Shuts down a Perl interpreter. See L<perlembed>.
595 VOL signed char destruct_level; /* see possible values in intrpvar.h */
597 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
601 PERL_ARGS_ASSERT_PERL_DESTRUCT;
603 PERL_UNUSED_ARG(my_perl);
606 /* wait for all pseudo-forked children to finish */
607 PERL_WAIT_FOR_CHILDREN;
609 destruct_level = PL_perl_destruct_level;
612 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
614 const int i = atoi(s);
615 if (destruct_level < i)
621 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
627 if (PL_endav && !PL_minus_c)
628 call_list(PL_scopestack_ix, PL_endav);
634 /* Need to flush since END blocks can produce output */
637 if (CALL_FPTR(PL_threadhook)(aTHX)) {
638 /* Threads hook has vetoed further cleanup */
639 PL_veto_cleanup = TRUE;
643 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
644 if (destruct_level != 0) {
645 /* Fork here to create a child. Our child's job is to preserve the
646 state of scalars prior to destruction, so that we can instruct it
647 to dump any scalars that we later find have leaked.
648 There's no subtlety in this code - it assumes POSIX, and it doesn't
652 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
653 perror("Debug leaking scalars socketpair failed");
659 perror("Debug leaking scalars fork failed");
663 /* We are the child */
664 const int sock = fd[1];
665 const int debug_fd = PerlIO_fileno(Perl_debug_log);
668 /* Our success message is an integer 0, and a char 0 */
669 static const char success[sizeof(int) + 1] = {0};
673 /* We need to close all other file descriptors otherwise we end up
674 with interesting hangs, where the parent closes its end of a
675 pipe, and sits waiting for (another) child to terminate. Only
676 that child never terminates, because it never gets EOF, because
677 we also have the far end of the pipe open. We even need to
678 close the debugging fd, because sometimes it happens to be one
679 end of a pipe, and a process is waiting on the other end for
680 EOF. Normally it would be closed at some point earlier in
681 destruction, but if we happen to cause the pipe to remain open,
682 EOF never occurs, and we get an infinite hang. Hence all the
683 games to pass in a file descriptor if it's actually needed. */
685 f = sysconf(_SC_OPEN_MAX);
687 where = "sysconf failed";
698 union control_un control;
701 struct cmsghdr *cmptr;
705 msg.msg_control = control.control;
706 msg.msg_controllen = sizeof(control.control);
707 /* We're a connected socket so we don't need a source */
711 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
713 vec[0].iov_base = (void*)⌖
714 vec[0].iov_len = sizeof(target);
716 got = recvmsg(sock, &msg, 0);
721 where = "recv failed";
724 if(got < sizeof(target)) {
725 where = "short recv";
729 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
733 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
734 where = "wrong cmsg_len";
737 if(cmptr->cmsg_level != SOL_SOCKET) {
738 where = "wrong cmsg_level";
741 if(cmptr->cmsg_type != SCM_RIGHTS) {
742 where = "wrong cmsg_type";
746 got_fd = *(int*)CMSG_DATA(cmptr);
747 /* For our last little bit of trickery, put the file descriptor
748 back into Perl_debug_log, as if we never actually closed it
750 if(got_fd != debug_fd) {
751 if (dup2(got_fd, debug_fd) == -1) {
758 PerlIO_flush(Perl_debug_log);
760 got = write(sock, &success, sizeof(success));
763 where = "write failed";
766 if(got < sizeof(success)) {
767 where = "short write";
774 int send_errno = errno;
775 unsigned char length = (unsigned char) strlen(where);
776 struct iovec failure[3] = {
777 {(void*)&send_errno, sizeof(send_errno)},
779 {(void*)where, length}
781 int got = writev(sock, failure, 3);
782 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
783 in the parent if we try to read from the socketpair after the
784 child has exited, even if there was data to read.
785 So sleep a bit to give the parent a fighting chance of
788 _exit((got == -1) ? errno : 0);
792 PL_dumper_fd = fd[0];
797 /* We must account for everything. */
799 /* Destroy the main CV and syntax tree */
800 /* Do this now, because destroying ops can cause new SVs to be generated
801 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
802 PL_curcop to point to a valid op from which the filename structure
804 PL_curcop = &PL_compiling;
806 /* ensure comppad/curpad to refer to main's pad */
807 if (CvPADLIST(PL_main_cv)) {
808 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
810 op_free(PL_main_root);
813 PL_main_start = NULL;
814 SvREFCNT_dec(PL_main_cv);
818 /* Tell PerlIO we are about to tear things apart in case
819 we have layers which are using resources that should
823 PerlIO_destruct(aTHX);
825 if (PL_sv_objcount) {
827 * Try to destruct global references. We do this first so that the
828 * destructors and destructees still exist. Some sv's might remain.
829 * Non-referenced objects are on their own.
833 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
834 PL_defoutgv = NULL; /* may have been freed */
837 /* unhook hooks which will soon be, or use, destroyed data */
838 SvREFCNT_dec(PL_warnhook);
840 SvREFCNT_dec(PL_diehook);
843 /* call exit list functions */
844 while (PL_exitlistlen-- > 0)
845 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
847 Safefree(PL_exitlist);
852 /* jettison our possibly duplicated environment */
853 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
854 * so we certainly shouldn't free it here
857 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
858 if (environ != PL_origenviron && !PL_use_safe_putenv
860 /* only main thread can free environ[0] contents */
861 && PL_curinterp == aTHX
867 for (i = 0; environ[i]; i++)
868 safesysfree(environ[i]);
870 /* Must use safesysfree() when working with environ. */
871 safesysfree(environ);
873 environ = PL_origenviron;
876 #endif /* !PERL_MICRO */
878 if (destruct_level == 0) {
880 DEBUG_P(debprofdump());
882 #if defined(PERLIO_LAYERS)
883 /* No more IO - including error messages ! */
884 PerlIO_cleanup(aTHX);
887 CopFILE_free(&PL_compiling);
888 CopSTASH_free(&PL_compiling);
890 /* The exit() function will do everything that needs doing. */
894 /* reset so print() ends up where we expect */
898 /* the syntax tree is shared between clones
899 * so op_free(PL_main_root) only ReREFCNT_dec's
900 * REGEXPs in the parent interpreter
901 * we need to manually ReREFCNT_dec for the clones
903 SvREFCNT_dec(PL_regex_padav);
904 PL_regex_padav = NULL;
908 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
909 PL_stashcache = NULL;
911 /* loosen bonds of global variables */
913 /* XXX can PL_parser still be non-null here? */
914 if(PL_parser && PL_parser->rsfp) {
915 (void)PerlIO_close(PL_parser->rsfp);
916 PL_parser->rsfp = NULL;
920 Safefree(PL_splitstr);
930 PL_doswitches = FALSE;
931 PL_dowarn = G_WARN_OFF;
932 PL_doextract = FALSE;
933 PL_sawampersand = FALSE; /* must save all match strings */
936 Safefree(PL_inplace);
938 SvREFCNT_dec(PL_patchlevel);
941 SvREFCNT_dec(PL_e_script);
947 /* magical thingies */
949 SvREFCNT_dec(PL_ofsgv); /* *, */
952 SvREFCNT_dec(PL_ors_sv); /* $\ */
955 SvREFCNT_dec(PL_rs); /* $/ */
958 Safefree(PL_osname); /* $^O */
961 SvREFCNT_dec(PL_statname);
965 /* defgv, aka *_ should be taken care of elsewhere */
967 /* clean up after study() */
968 SvREFCNT_dec(PL_lastscream);
969 PL_lastscream = NULL;
970 Safefree(PL_screamfirst);
972 Safefree(PL_screamnext);
976 Safefree(PL_efloatbuf);
980 /* startup and shutdown function lists */
981 SvREFCNT_dec(PL_beginav);
982 SvREFCNT_dec(PL_beginav_save);
983 SvREFCNT_dec(PL_endav);
984 SvREFCNT_dec(PL_checkav);
985 SvREFCNT_dec(PL_checkav_save);
986 SvREFCNT_dec(PL_unitcheckav);
987 SvREFCNT_dec(PL_unitcheckav_save);
988 SvREFCNT_dec(PL_initav);
990 PL_beginav_save = NULL;
993 PL_checkav_save = NULL;
994 PL_unitcheckav = NULL;
995 PL_unitcheckav_save = NULL;
998 /* shortcuts just get cleared */
1004 PL_argvoutgv = NULL;
1007 PL_last_in_gv = NULL;
1019 SvREFCNT_dec(PL_argvout_stack);
1020 PL_argvout_stack = NULL;
1022 SvREFCNT_dec(PL_modglobal);
1023 PL_modglobal = NULL;
1024 SvREFCNT_dec(PL_preambleav);
1025 PL_preambleav = NULL;
1026 SvREFCNT_dec(PL_subname);
1028 #ifdef PERL_USES_PL_PIDSTATUS
1029 SvREFCNT_dec(PL_pidstatus);
1030 PL_pidstatus = NULL;
1032 SvREFCNT_dec(PL_toptarget);
1033 PL_toptarget = NULL;
1034 SvREFCNT_dec(PL_bodytarget);
1035 PL_bodytarget = NULL;
1036 PL_formtarget = NULL;
1038 /* free locale stuff */
1039 #ifdef USE_LOCALE_COLLATE
1040 Safefree(PL_collation_name);
1041 PL_collation_name = NULL;
1044 #ifdef USE_LOCALE_NUMERIC
1045 Safefree(PL_numeric_name);
1046 PL_numeric_name = NULL;
1047 SvREFCNT_dec(PL_numeric_radix_sv);
1048 PL_numeric_radix_sv = NULL;
1051 /* clear utf8 character classes */
1052 SvREFCNT_dec(PL_utf8_alnum);
1053 SvREFCNT_dec(PL_utf8_alnumc);
1054 SvREFCNT_dec(PL_utf8_ascii);
1055 SvREFCNT_dec(PL_utf8_alpha);
1056 SvREFCNT_dec(PL_utf8_space);
1057 SvREFCNT_dec(PL_utf8_cntrl);
1058 SvREFCNT_dec(PL_utf8_graph);
1059 SvREFCNT_dec(PL_utf8_digit);
1060 SvREFCNT_dec(PL_utf8_upper);
1061 SvREFCNT_dec(PL_utf8_lower);
1062 SvREFCNT_dec(PL_utf8_print);
1063 SvREFCNT_dec(PL_utf8_punct);
1064 SvREFCNT_dec(PL_utf8_xdigit);
1065 SvREFCNT_dec(PL_utf8_mark);
1066 SvREFCNT_dec(PL_utf8_toupper);
1067 SvREFCNT_dec(PL_utf8_totitle);
1068 SvREFCNT_dec(PL_utf8_tolower);
1069 SvREFCNT_dec(PL_utf8_tofold);
1070 SvREFCNT_dec(PL_utf8_idstart);
1071 SvREFCNT_dec(PL_utf8_idcont);
1072 PL_utf8_alnum = NULL;
1073 PL_utf8_alnumc = NULL;
1074 PL_utf8_ascii = NULL;
1075 PL_utf8_alpha = NULL;
1076 PL_utf8_space = NULL;
1077 PL_utf8_cntrl = NULL;
1078 PL_utf8_graph = NULL;
1079 PL_utf8_digit = NULL;
1080 PL_utf8_upper = NULL;
1081 PL_utf8_lower = NULL;
1082 PL_utf8_print = NULL;
1083 PL_utf8_punct = NULL;
1084 PL_utf8_xdigit = NULL;
1085 PL_utf8_mark = NULL;
1086 PL_utf8_toupper = NULL;
1087 PL_utf8_totitle = NULL;
1088 PL_utf8_tolower = NULL;
1089 PL_utf8_tofold = NULL;
1090 PL_utf8_idstart = NULL;
1091 PL_utf8_idcont = NULL;
1093 if (!specialWARN(PL_compiling.cop_warnings))
1094 PerlMemShared_free(PL_compiling.cop_warnings);
1095 PL_compiling.cop_warnings = NULL;
1096 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1097 PL_compiling.cop_hints_hash = NULL;
1098 CopFILE_free(&PL_compiling);
1099 CopSTASH_free(&PL_compiling);
1101 /* Prepare to destruct main symbol table. */
1106 SvREFCNT_dec(PL_curstname);
1107 PL_curstname = NULL;
1109 /* clear queued errors */
1110 SvREFCNT_dec(PL_errors);
1113 SvREFCNT_dec(PL_isarev);
1116 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1117 if (PL_scopestack_ix != 0)
1118 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1119 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1120 (long)PL_scopestack_ix);
1121 if (PL_savestack_ix != 0)
1122 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1123 "Unbalanced saves: %ld more saves than restores\n",
1124 (long)PL_savestack_ix);
1125 if (PL_tmps_floor != -1)
1126 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1127 (long)PL_tmps_floor + 1);
1128 if (cxstack_ix != -1)
1129 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1130 (long)cxstack_ix + 1);
1133 /* Now absolutely destruct everything, somehow or other, loops or no. */
1135 /* the 2 is for PL_fdpid and PL_strtab */
1136 while (sv_clean_all() > 2)
1139 AvREAL_off(PL_fdpid); /* no surviving entries */
1140 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1143 #ifdef HAVE_INTERP_INTERN
1147 /* Destruct the global string table. */
1149 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1150 * so that sv_free() won't fail on them.
1151 * Now that the global string table is using a single hunk of memory
1152 * for both HE and HEK, we either need to explicitly unshare it the
1153 * correct way, or actually free things here.
1156 const I32 max = HvMAX(PL_strtab);
1157 HE * const * const array = HvARRAY(PL_strtab);
1158 HE *hent = array[0];
1161 if (hent && ckWARN_d(WARN_INTERNAL)) {
1162 HE * const next = HeNEXT(hent);
1163 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1164 "Unbalanced string table refcount: (%ld) for \"%s\"",
1165 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1172 hent = array[riter];
1177 HvARRAY(PL_strtab) = 0;
1178 HvTOTALKEYS(PL_strtab) = 0;
1179 HvFILL(PL_strtab) = 0;
1181 SvREFCNT_dec(PL_strtab);
1184 /* free the pointer tables used for cloning */
1185 ptr_table_free(PL_ptr_table);
1186 PL_ptr_table = (PTR_TBL_t*)NULL;
1189 /* free special SVs */
1191 SvREFCNT(&PL_sv_yes) = 0;
1192 sv_clear(&PL_sv_yes);
1193 SvANY(&PL_sv_yes) = NULL;
1194 SvFLAGS(&PL_sv_yes) = 0;
1196 SvREFCNT(&PL_sv_no) = 0;
1197 sv_clear(&PL_sv_no);
1198 SvANY(&PL_sv_no) = NULL;
1199 SvFLAGS(&PL_sv_no) = 0;
1203 for (i=0; i<=2; i++) {
1204 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1205 sv_clear(PERL_DEBUG_PAD(i));
1206 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1207 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1211 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1212 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1214 #ifdef DEBUG_LEAKING_SCALARS
1215 if (PL_sv_count != 0) {
1220 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1221 svend = &sva[SvREFCNT(sva)];
1222 for (sv = sva + 1; sv < svend; ++sv) {
1223 if (SvTYPE(sv) != SVTYPEMASK) {
1224 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1226 " refcnt=%"UVuf pTHX__FORMAT "\n"
1227 "\tallocated at %s:%d %s %s%s\n",
1228 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1230 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1232 sv->sv_debug_inpad ? "for" : "by",
1233 sv->sv_debug_optype ?
1234 PL_op_name[sv->sv_debug_optype]: "(none)",
1235 sv->sv_debug_cloned ? " (cloned)" : ""
1237 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1238 Perl_dump_sv_child(aTHX_ sv);
1244 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1248 /* Wait for up to 4 seconds for child to terminate.
1249 This seems to be the least effort way of timing out on reaping
1251 struct timeval waitfor = {4, 0};
1252 int sock = PL_dumper_fd;
1256 FD_SET(sock, &rset);
1257 select(sock + 1, &rset, NULL, NULL, &waitfor);
1258 waitpid(child, &status, WNOHANG);
1263 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1269 #ifdef PERL_DEBUG_READONLY_OPS
1275 #if defined(PERLIO_LAYERS)
1276 /* No more IO - including error messages ! */
1277 PerlIO_cleanup(aTHX);
1280 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1281 as currently layers use it rather than NULL as a marker
1282 for no arg - and will try and SvREFCNT_dec it.
1284 SvREFCNT(&PL_sv_undef) = 0;
1285 SvREADONLY_off(&PL_sv_undef);
1287 Safefree(PL_origfilename);
1288 PL_origfilename = NULL;
1289 Safefree(PL_reg_start_tmp);
1290 PL_reg_start_tmp = (char**)NULL;
1291 PL_reg_start_tmpl = 0;
1292 Safefree(PL_reg_curpm);
1293 Safefree(PL_reg_poscache);
1294 free_tied_hv_pool();
1295 Safefree(PL_op_mask);
1296 Safefree(PL_psig_ptr);
1297 PL_psig_ptr = (SV**)NULL;
1298 Safefree(PL_psig_name);
1299 PL_psig_name = (SV**)NULL;
1300 Safefree(PL_bitcount);
1302 Safefree(PL_psig_pend);
1303 PL_psig_pend = (int*)NULL;
1306 PL_tainting = FALSE;
1307 PL_taint_warn = FALSE;
1308 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1311 DEBUG_P(debprofdump());
1313 #ifdef USE_REENTRANT_API
1314 Perl_reentrant_free(aTHX);
1319 while (PL_regmatch_slab) {
1320 regmatch_slab *s = PL_regmatch_slab;
1321 PL_regmatch_slab = PL_regmatch_slab->next;
1325 /* As the absolutely last thing, free the non-arena SV for mess() */
1328 /* we know that type == SVt_PVMG */
1330 /* it could have accumulated taint magic */
1333 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1334 moremagic = mg->mg_moremagic;
1335 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1337 Safefree(mg->mg_ptr);
1341 /* we know that type >= SVt_PV */
1342 SvPV_free(PL_mess_sv);
1343 Safefree(SvANY(PL_mess_sv));
1344 Safefree(PL_mess_sv);
1351 =for apidoc perl_free
1353 Releases a Perl interpreter. See L<perlembed>.
1363 PERL_ARGS_ASSERT_PERL_FREE;
1365 if (PL_veto_cleanup)
1368 #ifdef PERL_TRACK_MEMPOOL
1371 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1372 * value as we're probably hunting memory leaks then
1374 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1375 if (!s || atoi(s) == 0) {
1376 const U32 old_debug = PL_debug;
1377 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1378 thread at thread exit. */
1380 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1381 "free this thread's memory\n");
1382 PL_debug &= ~ DEBUG_m_FLAG;
1384 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1385 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1386 PL_debug = old_debug;
1391 #if defined(WIN32) || defined(NETWARE)
1392 # if defined(PERL_IMPLICIT_SYS)
1395 void *host = nw_internal_host;
1397 void *host = w32_internal_host;
1399 PerlMem_free(aTHXx);
1401 nw_delete_internal_host(host);
1403 win32_delete_internal_host(host);
1407 PerlMem_free(aTHXx);
1410 PerlMem_free(aTHXx);
1414 #if defined(USE_ITHREADS)
1415 /* provide destructors to clean up the thread key when libperl is unloaded */
1416 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1418 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1419 #pragma fini "perl_fini"
1420 #elif defined(__sun) && !defined(__GNUC__)
1421 #pragma fini (perl_fini)
1425 #if defined(__GNUC__)
1426 __attribute__((destructor))
1431 if (PL_curinterp && !PL_veto_cleanup)
1436 #endif /* THREADS */
1439 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1442 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1443 PL_exitlist[PL_exitlistlen].fn = fn;
1444 PL_exitlist[PL_exitlistlen].ptr = ptr;
1448 #ifdef HAS_PROCSELFEXE
1449 /* This is a function so that we don't hold on to MAXPATHLEN
1450 bytes of stack longer than necessary
1453 S_procself_val(pTHX_ SV *sv, const char *arg0)
1455 char buf[MAXPATHLEN];
1456 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1458 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1459 includes a spurious NUL which will cause $^X to fail in system
1460 or backticks (this will prevent extensions from being built and
1461 many tests from working). readlink is not meant to add a NUL.
1462 Normal readlink works fine.
1464 if (len > 0 && buf[len-1] == '\0') {
1468 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1469 returning the text "unknown" from the readlink rather than the path
1470 to the executable (or returning an error from the readlink). Any valid
1471 path has a '/' in it somewhere, so use that to validate the result.
1472 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1474 if (len > 0 && memchr(buf, '/', len)) {
1475 sv_setpvn(sv,buf,len);
1481 #endif /* HAS_PROCSELFEXE */
1484 S_set_caret_X(pTHX) {
1486 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1488 #ifdef HAS_PROCSELFEXE
1489 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1492 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1494 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1501 =for apidoc perl_parse
1503 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1509 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1516 PERL_ARGS_ASSERT_PERL_PARSE;
1517 #ifndef MULTIPLICITY
1518 PERL_UNUSED_ARG(my_perl);
1521 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1522 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1523 "execute\nsetuid perl scripts securely.\n");
1526 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1527 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1528 * This MUST be done before any hash stores or fetches take place.
1529 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1530 * yourself, it is your responsibility to provide a good random seed!
1531 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1532 if (!PL_rehash_seed_set)
1533 PL_rehash_seed = get_hash_seed();
1535 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1537 if (s && (atoi(s) == 1))
1538 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1540 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1545 if (PL_origalen != 0) {
1546 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1549 /* Set PL_origalen be the sum of the contiguous argv[]
1550 * elements plus the size of the env in case that it is
1551 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1552 * as the maximum modifiable length of $0. In the worst case
1553 * the area we are able to modify is limited to the size of
1554 * the original argv[0]. (See below for 'contiguous', though.)
1556 const char *s = NULL;
1559 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1560 /* Do the mask check only if the args seem like aligned. */
1562 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1564 /* See if all the arguments are contiguous in memory. Note
1565 * that 'contiguous' is a loose term because some platforms
1566 * align the argv[] and the envp[]. If the arguments look
1567 * like non-aligned, assume that they are 'strictly' or
1568 * 'traditionally' contiguous. If the arguments look like
1569 * aligned, we just check that they are within aligned
1570 * PTRSIZE bytes. As long as no system has something bizarre
1571 * like the argv[] interleaved with some other data, we are
1572 * fine. (Did I just evoke Murphy's Law?) --jhi */
1573 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1575 for (i = 1; i < PL_origargc; i++) {
1576 if ((PL_origargv[i] == s + 1
1578 || PL_origargv[i] == s + 2
1583 (PL_origargv[i] > s &&
1585 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1596 #ifndef PERL_USE_SAFE_PUTENV
1597 /* Can we grab env area too to be used as the area for $0? */
1598 if (s && PL_origenviron && !PL_use_safe_putenv) {
1599 if ((PL_origenviron[0] == s + 1)
1602 (PL_origenviron[0] > s &&
1603 PL_origenviron[0] <=
1604 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1607 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1608 s = PL_origenviron[0];
1611 my_setenv("NoNe SuCh", NULL);
1612 /* Force copy of environment. */
1613 for (i = 1; PL_origenviron[i]; i++) {
1614 if (PL_origenviron[i] == s + 1
1617 (PL_origenviron[i] > s &&
1618 PL_origenviron[i] <=
1619 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1622 s = PL_origenviron[i];
1630 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1632 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1637 /* Come here if running an undumped a.out. */
1639 PL_origfilename = savepv(argv[0]);
1640 PL_do_undump = FALSE;
1641 cxstack_ix = -1; /* start label stack again */
1643 assert (!PL_tainted);
1645 S_set_caret_X(aTHX);
1647 init_postdump_symbols(argc,argv,env);
1652 op_free(PL_main_root);
1653 PL_main_root = NULL;
1655 PL_main_start = NULL;
1656 SvREFCNT_dec(PL_main_cv);
1660 oldscope = PL_scopestack_ix;
1661 PL_dowarn = G_WARN_OFF;
1666 parse_body(env,xsinit);
1668 call_list(oldscope, PL_unitcheckav);
1670 call_list(oldscope, PL_checkav);
1677 /* my_exit() was called */
1678 while (PL_scopestack_ix > oldscope)
1681 PL_curstash = PL_defstash;
1683 call_list(oldscope, PL_unitcheckav);
1685 call_list(oldscope, PL_checkav);
1689 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1698 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1702 int argc = PL_origargc;
1703 char **argv = PL_origargv;
1704 const char *scriptname = NULL;
1705 VOL bool dosearch = FALSE;
1707 const char *validarg = "";
1711 const char *cddir = NULL;
1712 #ifdef USE_SITECUSTOMIZE
1713 bool minus_f = FALSE;
1715 SV *linestr_sv = newSV_type(SVt_PVIV);
1716 bool add_read_e_script = FALSE;
1718 SvGROW(linestr_sv, 80);
1719 sv_setpvs(linestr_sv,"");
1721 sv = newSVpvs(""); /* first used for -I flags */
1727 for (argc--,argv++; argc > 0; argc--,argv++) {
1728 if (argv[0][0] != '-' || !argv[0][1])
1732 validarg = " PHOOEY ";
1736 * Can we rely on the kernel to start scripts with argv[1] set to
1737 * contain all #! line switches (the whole line)? (argv[0] is set to
1738 * the interpreter name, argv[2] to the script name; argv[3] and
1739 * above may contain other arguments.)
1746 #ifndef PERL_STRICT_CR
1770 if ((s = moreswitches(s)))
1775 CHECK_MALLOC_TOO_LATE_FOR('t');
1776 if( !PL_tainting ) {
1777 PL_taint_warn = TRUE;
1783 CHECK_MALLOC_TOO_LATE_FOR('T');
1785 PL_taint_warn = FALSE;
1793 #ifdef MACOS_TRADITIONAL
1794 /* ignore -e for Dev:Pseudo argument */
1795 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1798 forbid_setid('e', FALSE);
1800 PL_e_script = newSVpvs("");
1801 add_read_e_script = TRUE;
1804 sv_catpv(PL_e_script, s);
1806 sv_catpv(PL_e_script, argv[1]);
1810 Perl_croak(aTHX_ "No code specified for -%c", c);
1811 sv_catpvs(PL_e_script, "\n");
1815 #ifdef USE_SITECUSTOMIZE
1821 case 'I': /* -I handled both here and in moreswitches() */
1822 forbid_setid('I', FALSE);
1823 if (!*++s && (s=argv[1]) != NULL) {
1827 STRLEN len = strlen(s);
1828 const char * const p = savepvn(s, len);
1829 incpush(p, TRUE, TRUE, FALSE, FALSE, FALSE);
1830 sv_catpvs(sv, "-I");
1831 sv_catpvn(sv, p, len);
1836 Perl_croak(aTHX_ "No directory specified for -I");
1839 forbid_setid('S', FALSE);
1847 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1849 /* Can't do newSVpvs() as that would involve pre-processor
1850 condititionals inside a macro expansion. */
1851 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1858 # ifdef PERL_DONT_CREATE_GVSV
1859 " PERL_DONT_CREATE_GVSV"
1861 # ifdef PERL_MALLOC_WRAP
1864 # ifdef PERL_MEM_LOG
1867 # ifdef PERL_MEM_LOG_ENV
1870 # ifdef PERL_MEM_LOG_ENV_FD
1871 " PERL_MEM_LOG_ENV_FD"
1873 # ifdef PERL_MEM_LOG_STDERR
1874 " PERL_MEM_LOG_STDERR"
1876 # ifdef PERL_MEM_LOG_TIMESTAMP
1877 " PERL_MEM_LOG_TIMESTAMP"
1879 # ifdef PERL_USE_DEVEL
1882 # ifdef PERL_USE_SAFE_PUTENV
1883 " PERL_USE_SAFE_PUTENV"
1885 # ifdef USE_SITECUSTOMIZE
1886 " USE_SITECUSTOMIZE"
1888 # ifdef USE_FAST_STDIO
1893 sv_catpv(opts_prog, PL_bincompat_options);
1894 /* Terminate the qw(, and then wrap at 76 columns. */
1895 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1897 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1899 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1901 sv_catpvs(opts_prog," Source revision: " STRINGIFY(PERL_GIT_SHA1) "\\n");
1902 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1904 #if defined(LOCAL_PATCH_COUNT)
1905 if (LOCAL_PATCH_COUNT > 0) {
1907 sv_catpvs(opts_prog,
1908 "\" Locally applied patches:\\n\",");
1909 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1910 if (PL_localpatches[i])
1911 #ifdef X_PERL_PATCHNUM
1912 if (strEQ(PL_localpatches[i],"DEVEL"))
1913 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1914 0, STRINGIFY(PERL_PATCHNUM), 0);
1917 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1918 0, PL_localpatches[i], 0);
1922 Perl_sv_catpvf(aTHX_ opts_prog,
1923 "\" Built under %s\\n",OSNAME);
1926 sv_catpvs(opts_prog,
1927 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1929 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1932 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1933 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1934 "sort grep {/^PERL/} keys %ENV; ");
1936 sv_catpvs(opts_prog,
1937 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1939 sv_catpvs(opts_prog,
1940 "print \" \\%ENV:\\n @env\\n\" if @env;"
1941 "print \" \\@INC:\\n @INC\\n\";");
1945 opts_prog = Perl_newSVpvf(aTHX_
1946 "Config::config_vars(qw%c%s%c)",
1950 av_push(PL_preambleav, opts_prog);
1951 /* don't look for script or read stdin */
1952 scriptname = BIT_BUCKET;
1956 PL_doextract = TRUE;
1964 if (!*++s || isSPACE(*s)) {
1968 /* catch use of gnu style long options */
1969 if (strEQ(s, "version")) {
1973 if (strEQ(s, "help")) {
1980 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1991 #ifndef SECURE_INTERNAL_GETENV
1994 (s = PerlEnv_getenv("PERL5OPT")))
1998 if (*s == '-' && *(s+1) == 'T') {
1999 CHECK_MALLOC_TOO_LATE_FOR('T');
2001 PL_taint_warn = FALSE;
2004 char *popt_copy = NULL;
2017 if (!strchr("CDIMUdmtw", *s))
2018 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2022 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2023 s = popt_copy + (s - d);
2031 if( !PL_tainting ) {
2032 PL_taint_warn = TRUE;
2043 #ifdef USE_SITECUSTOMIZE
2045 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2046 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2051 scriptname = argv[0];
2054 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2056 else if (scriptname == NULL) {
2058 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2064 /* Set $^X early so that it can be used for relocatable paths in @INC */
2065 assert (!PL_tainted);
2067 S_set_caret_X(aTHX);
2072 bool suidscript = FALSE;
2075 const int fdscript =
2077 open_script(scriptname, dosearch, &suidscript, &rsfp);
2079 validate_suid(validarg, scriptname, fdscript, suidscript,
2083 # if defined(SIGCHLD) || defined(SIGCLD)
2086 # define SIGCHLD SIGCLD
2088 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2089 if (sigstate == (Sighandler_t) SIG_IGN) {
2090 if (ckWARN(WARN_SIGNAL))
2091 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2092 "Can't ignore signal CHLD, forcing to default");
2093 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2100 #ifdef MACOS_TRADITIONAL
2101 || gMacPerl_AlwaysExtract
2105 /* This will croak if suidscript is true, as -x cannot be used with
2107 forbid_setid('x', suidscript);
2108 /* Hence you can't get here if suidscript is true */
2110 find_beginning(linestr_sv, rsfp);
2111 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2112 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2116 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2117 CvUNIQUE_on(PL_compcv);
2119 CvPADLIST(PL_compcv) = pad_new(0);
2121 PL_isarev = newHV();
2124 boot_core_UNIVERSAL();
2125 boot_core_xsutils();
2129 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2131 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2137 # ifdef HAS_SOCKS5_INIT
2138 socks5_init(argv[0]);
2144 init_predump_symbols();
2145 /* init_postdump_symbols not currently designed to be called */
2146 /* more than once (ENV isn't cleared first, for example) */
2147 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2149 init_postdump_symbols(argc,argv,env);
2151 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2152 * or explicitly in some platforms.
2153 * locale.c:Perl_init_i18nl10n() if the environment
2154 * look like the user wants to use UTF-8. */
2155 #if defined(__SYMBIAN32__)
2156 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2159 /* Requires init_predump_symbols(). */
2160 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2165 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2166 * and the default open disciplines. */
2167 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2168 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2170 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2171 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2172 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2174 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2175 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2176 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2178 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2179 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2180 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2182 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2183 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2186 sv_setpvs(sv, ":utf8\0:utf8");
2188 sv_setpvs(sv, ":utf8\0");
2191 sv_setpvs(sv, "\0:utf8");
2199 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2200 if (strEQ(s, "unsafe"))
2201 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2202 else if (strEQ(s, "safe"))
2203 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2205 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2212 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2216 PL_xmlfp = PerlIO_stdout();
2218 PL_xmlfp = PerlIO_open(s, "w");
2220 Perl_croak(aTHX_ "Can't open %s", s);
2222 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2228 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2229 PL_madskills = atoi(s);
2230 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2235 lex_start(linestr_sv, rsfp, TRUE);
2236 PL_subname = newSVpvs("main");
2238 if (add_read_e_script)
2239 filter_add(read_e_script, NULL);
2241 /* now parse the script */
2243 SETERRNO(0,SS_NORMAL);
2244 #ifdef MACOS_TRADITIONAL
2245 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2247 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2249 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2250 MacPerl_MPWFileName(PL_origfilename));
2254 if (yyparse() || PL_parser->error_count) {
2256 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2258 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2263 CopLINE_set(PL_curcop, 0);
2264 PL_curstash = PL_defstash;
2266 SvREFCNT_dec(PL_e_script);
2274 SAVECOPFILE(PL_curcop);
2275 SAVECOPLINE(PL_curcop);
2276 gv_check(PL_defstash);
2285 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2286 dump_mstats("after compilation:");
2296 =for apidoc perl_run
2298 Tells a Perl interpreter to run. See L<perlembed>.
2311 PERL_ARGS_ASSERT_PERL_RUN;
2312 #ifndef MULTIPLICITY
2313 PERL_UNUSED_ARG(my_perl);
2316 oldscope = PL_scopestack_ix;
2324 cxstack_ix = -1; /* start context stack again */
2326 case 0: /* normal completion */
2330 case 2: /* my_exit() */
2331 while (PL_scopestack_ix > oldscope)
2334 PL_curstash = PL_defstash;
2335 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2336 PL_endav && !PL_minus_c)
2337 call_list(oldscope, PL_endav);
2339 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2340 dump_mstats("after execution: ");
2346 POPSTACK_TO(PL_mainstack);
2349 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2360 S_run_body(pTHX_ I32 oldscope)
2363 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2364 PL_sawampersand ? "Enabling" : "Omitting"));
2366 if (!PL_restartop) {
2370 exit(0); /* less likely to core dump than my_exit(0) */
2373 DEBUG_x(dump_all());
2376 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2380 #ifdef MACOS_TRADITIONAL
2381 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2382 (gMacPerl_ErrorFormat ? "# " : ""),
2383 MacPerl_MPWFileName(PL_origfilename));
2385 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2389 if (PERLDB_SINGLE && PL_DBsingle)
2390 sv_setiv(PL_DBsingle, 1);
2392 call_list(oldscope, PL_initav);
2393 #ifdef PERL_DEBUG_READONLY_OPS
2394 Perl_pending_Slabs_to_ro(aTHX);
2401 PL_op = PL_restartop;
2405 else if (PL_main_start) {
2406 CvDEPTH(PL_main_cv) = 1;
2407 PL_op = PL_main_start;
2415 =head1 SV Manipulation Functions
2417 =for apidoc p||get_sv
2419 Returns the SV of the specified Perl scalar. If C<create> is set and the
2420 Perl variable does not exist then it will be created. If C<create> is not
2421 set and the variable does not exist then NULL is returned.
2427 Perl_get_sv(pTHX_ const char *name, I32 create)
2431 PERL_ARGS_ASSERT_GET_SV;
2433 gv = gv_fetchpv(name, create, SVt_PV);
2440 =head1 Array Manipulation Functions
2442 =for apidoc p||get_av
2444 Returns the AV of the specified Perl array. If C<create> is set and the
2445 Perl variable does not exist then it will be created. If C<create> is not
2446 set and the variable does not exist then NULL is returned.
2452 Perl_get_av(pTHX_ const char *name, I32 create)
2454 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2456 PERL_ARGS_ASSERT_GET_AV;
2466 =head1 Hash Manipulation Functions
2468 =for apidoc p||get_hv
2470 Returns the HV of the specified Perl hash. If C<create> is set and the
2471 Perl variable does not exist then it will be created. If C<create> is not
2472 set and the variable does not exist then NULL is returned.
2478 Perl_get_hv(pTHX_ const char *name, I32 create)
2480 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2482 PERL_ARGS_ASSERT_GET_HV;
2492 =head1 CV Manipulation Functions
2494 =for apidoc p||get_cvn_flags
2496 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2497 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2498 exist then it will be declared (which has the same effect as saying
2499 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2500 then NULL is returned.
2502 =for apidoc p||get_cv
2504 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2510 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2512 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2513 /* XXX this is probably not what they think they're getting.
2514 * It has the same effect as "sub name;", i.e. just a forward
2517 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2519 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2520 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2521 return newSUB(start_subparse(FALSE, 0),
2522 newSVOP(OP_CONST, 0, sv),
2531 Perl_get_cv(pTHX_ const char *name, I32 flags)
2533 PERL_ARGS_ASSERT_GET_CV;
2535 return get_cvn_flags(name, strlen(name), flags);
2538 /* Be sure to refetch the stack pointer after calling these routines. */
2542 =head1 Callback Functions
2544 =for apidoc p||call_argv
2546 Performs a callback to the specified Perl sub. See L<perlcall>.
2552 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2554 /* See G_* flags in cop.h */
2555 /* null terminated arg list */
2560 PERL_ARGS_ASSERT_CALL_ARGV;
2565 mXPUSHs(newSVpv(*argv,0));
2570 return call_pv(sub_name, flags);
2574 =for apidoc p||call_pv
2576 Performs a callback to the specified Perl sub. See L<perlcall>.
2582 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2583 /* name of the subroutine */
2584 /* See G_* flags in cop.h */
2586 PERL_ARGS_ASSERT_CALL_PV;
2588 return call_sv(MUTABLE_SV(get_cv(sub_name, TRUE)), flags);
2592 =for apidoc p||call_method
2594 Performs a callback to the specified Perl method. The blessed object must
2595 be on the stack. See L<perlcall>.
2601 Perl_call_method(pTHX_ const char *methname, I32 flags)
2602 /* name of the subroutine */
2603 /* See G_* flags in cop.h */
2605 PERL_ARGS_ASSERT_CALL_METHOD;
2607 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2610 /* May be called with any of a CV, a GV, or an SV containing the name. */
2612 =for apidoc p||call_sv
2614 Performs a callback to the Perl sub whose name is in the SV. See
2621 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2622 /* See G_* flags in cop.h */
2625 LOGOP myop; /* fake syntax tree node */
2630 bool oldcatch = CATCH_GET;
2632 OP* const oldop = PL_op;
2635 PERL_ARGS_ASSERT_CALL_SV;
2637 if (flags & G_DISCARD) {
2641 if (!(flags & G_WANT)) {
2642 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2647 Zero(&myop, 1, LOGOP);
2648 myop.op_next = NULL;
2649 if (!(flags & G_NOARGS))
2650 myop.op_flags |= OPf_STACKED;
2651 myop.op_flags |= OP_GIMME_REVERSE(flags);
2655 EXTEND(PL_stack_sp, 1);
2656 *++PL_stack_sp = sv;
2658 oldscope = PL_scopestack_ix;
2660 if (PERLDB_SUB && PL_curstash != PL_debstash
2661 /* Handle first BEGIN of -d. */
2662 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2663 /* Try harder, since this may have been a sighandler, thus
2664 * curstash may be meaningless. */
2665 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2666 && !(flags & G_NODEBUG))
2667 PL_op->op_private |= OPpENTERSUB_DB;
2669 if (flags & G_METHOD) {
2670 Zero(&method_op, 1, UNOP);
2671 method_op.op_next = PL_op;
2672 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2673 method_op.op_type = OP_METHOD;
2674 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2675 myop.op_type = OP_ENTERSUB;
2676 PL_op = (OP*)&method_op;
2679 if (!(flags & G_EVAL)) {
2681 CALL_BODY_SUB((OP*)&myop);
2682 retval = PL_stack_sp - (PL_stack_base + oldmark);
2683 CATCH_SET(oldcatch);
2686 myop.op_other = (OP*)&myop;
2688 create_eval_scope(flags|G_FAKINGEVAL);
2696 CALL_BODY_SUB((OP*)&myop);
2697 retval = PL_stack_sp - (PL_stack_base + oldmark);
2698 if (!(flags & G_KEEPERR)) {
2706 /* my_exit() was called */
2707 PL_curstash = PL_defstash;
2710 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2711 Perl_croak(aTHX_ "Callback called exit");
2716 PL_op = PL_restartop;
2720 PL_stack_sp = PL_stack_base + oldmark;
2721 if ((flags & G_WANT) == G_ARRAY)
2725 *++PL_stack_sp = &PL_sv_undef;
2730 if (PL_scopestack_ix > oldscope)
2731 delete_eval_scope();
2735 if (flags & G_DISCARD) {
2736 PL_stack_sp = PL_stack_base + oldmark;
2745 /* Eval a string. The G_EVAL flag is always assumed. */
2748 =for apidoc p||eval_sv
2750 Tells Perl to C<eval> the string in the SV.
2756 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2758 /* See G_* flags in cop.h */
2762 UNOP myop; /* fake syntax tree node */
2763 VOL I32 oldmark = SP - PL_stack_base;
2766 OP* const oldop = PL_op;
2769 PERL_ARGS_ASSERT_EVAL_SV;
2771 if (flags & G_DISCARD) {
2778 Zero(PL_op, 1, UNOP);
2779 EXTEND(PL_stack_sp, 1);
2780 *++PL_stack_sp = sv;
2782 if (!(flags & G_NOARGS))
2783 myop.op_flags = OPf_STACKED;
2784 myop.op_next = NULL;
2785 myop.op_type = OP_ENTEREVAL;
2786 myop.op_flags |= OP_GIMME_REVERSE(flags);
2787 if (flags & G_KEEPERR)
2788 myop.op_flags |= OPf_SPECIAL;
2790 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2791 * before a PUSHEVAL, which corrupts the stack after a croak */
2792 TAINT_PROPER("eval_sv()");
2798 CALL_BODY_EVAL((OP*)&myop);
2799 retval = PL_stack_sp - (PL_stack_base + oldmark);
2800 if (!(flags & G_KEEPERR)) {
2808 /* my_exit() was called */
2809 PL_curstash = PL_defstash;
2812 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2813 Perl_croak(aTHX_ "Callback called exit");
2818 PL_op = PL_restartop;
2822 PL_stack_sp = PL_stack_base + oldmark;
2823 if ((flags & G_WANT) == G_ARRAY)
2827 *++PL_stack_sp = &PL_sv_undef;
2833 if (flags & G_DISCARD) {
2834 PL_stack_sp = PL_stack_base + oldmark;
2844 =for apidoc p||eval_pv
2846 Tells Perl to C<eval> the given string and return an SV* result.
2852 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2856 SV* sv = newSVpv(p, 0);
2858 PERL_ARGS_ASSERT_EVAL_PV;
2860 eval_sv(sv, G_SCALAR);
2867 if (croak_on_error && SvTRUE(ERRSV)) {
2868 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2874 /* Require a module. */
2877 =head1 Embedding Functions
2879 =for apidoc p||require_pv
2881 Tells Perl to C<require> the file named by the string argument. It is
2882 analogous to the Perl code C<eval "require '$file'">. It's even
2883 implemented that way; consider using load_module instead.
2888 Perl_require_pv(pTHX_ const char *pv)
2894 PERL_ARGS_ASSERT_REQUIRE_PV;
2896 PUSHSTACKi(PERLSI_REQUIRE);
2898 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2899 eval_sv(sv_2mortal(sv), G_DISCARD);
2905 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2907 /* This message really ought to be max 23 lines.
2908 * Removed -h because the user already knows that option. Others? */
2910 static const char * const usage_msg[] = {
2911 "-0[octal] specify record separator (\\0, if no argument)",
2912 "-a autosplit mode with -n or -p (splits $_ into @F)",
2913 "-C[number/list] enables the listed Unicode features",
2914 "-c check syntax only (runs BEGIN and CHECK blocks)",
2915 "-d[:debugger] run program under debugger",
2916 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2917 "-e program one line of program (several -e's allowed, omit programfile)",
2918 "-E program like -e, but enables all optional features",
2919 "-f don't do $sitelib/sitecustomize.pl at startup",
2920 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2921 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2922 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2923 "-l[octal] enable line ending processing, specifies line terminator",
2924 "-[mM][-]module execute \"use/no module...\" before executing program",
2925 "-n assume \"while (<>) { ... }\" loop around program",
2926 "-p assume loop like -n but print line also, like sed",
2927 "-s enable rudimentary parsing for switches after programfile",
2928 "-S look for programfile using PATH environment variable",
2929 "-t enable tainting warnings",
2930 "-T enable tainting checks",
2931 "-u dump core after parsing program",
2932 "-U allow unsafe operations",
2933 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2934 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2935 "-w enable many useful warnings (RECOMMENDED)",
2936 "-W enable all warnings",
2937 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2938 "-X disable all warnings",
2942 const char * const *p = usage_msg;
2944 PERL_ARGS_ASSERT_USAGE;
2946 PerlIO_printf(PerlIO_stdout(),
2947 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2950 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2953 /* convert a string of -D options (or digits) into an int.
2954 * sets *s to point to the char after the options */
2958 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2960 static const char * const usage_msgd[] = {
2961 " Debugging flag values: (see also -d)",
2962 " p Tokenizing and parsing (with v, displays parse stack)",
2963 " s Stack snapshots (with v, displays all stacks)",
2964 " l Context (loop) stack processing",
2965 " t Trace execution",
2966 " o Method and overloading resolution",
2967 " c String/numeric conversions",
2968 " P Print profiling info, source file input state",
2969 " m Memory and SV allocation",
2970 " f Format processing",
2971 " r Regular expression parsing and execution",
2972 " x Syntax tree dump",
2973 " u Tainting checks",
2974 " H Hash dump -- usurps values()",
2975 " X Scratchpad allocation",
2978 " R Include reference counts of dumped variables (eg when using -Ds)",
2979 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2980 " v Verbose: use in conjunction with other flags",
2982 " A Consistency checks on internal structures",
2983 " q quiet - currently only suppresses the 'EXECUTING' message",
2988 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2991 /* if adding extra options, remember to update DEBUG_MASK */
2992 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2994 for (; isALNUM(**s); (*s)++) {
2995 const char * const d = strchr(debopts,**s);
2997 i |= 1 << (d - debopts);
2998 else if (ckWARN_d(WARN_DEBUGGING))
2999 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3000 "invalid option -D%c, use -D'' to see choices\n", **s);
3003 else if (isDIGIT(**s)) {
3005 for (; isALNUM(**s); (*s)++) ;
3007 else if (givehelp) {
3008 const char *const *p = usage_msgd;
3009 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3012 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3013 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3014 "-Dp not implemented on this platform\n");
3020 /* This routine handles any switches that can be given during run */
3023 Perl_moreswitches(pTHX_ const char *s)
3027 const char option = *s; /* used to remember option in -m/-M code */
3029 PERL_ARGS_ASSERT_MORESWITCHES;
3037 SvREFCNT_dec(PL_rs);
3038 if (s[1] == 'x' && s[2]) {
3039 const char *e = s+=2;
3045 flags = PERL_SCAN_SILENT_ILLDIGIT;
3046 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3047 if (s + numlen < e) {
3048 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3052 PL_rs = newSVpvs("");
3053 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3054 tmps = (U8*)SvPVX(PL_rs);
3055 uvchr_to_utf8(tmps, rschar);
3056 SvCUR_set(PL_rs, UNISKIP(rschar));
3061 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3062 if (rschar & ~((U8)~0))
3063 PL_rs = &PL_sv_undef;
3064 else if (!rschar && numlen >= 2)
3065 PL_rs = newSVpvs("");
3067 char ch = (char)rschar;
3068 PL_rs = newSVpvn(&ch, 1);
3071 sv_setsv(get_sv("/", TRUE), PL_rs);
3076 PL_unicode = parse_unicode_opts( (const char **)&s );
3077 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3083 while (*s && !isSPACE(*s)) ++s;
3084 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3095 forbid_setid('d', FALSE);
3098 /* -dt indicates to the debugger that threads will be used */
3099 if (*s == 't' && !isALNUM(s[1])) {
3101 my_setenv("PERL5DB_THREADED", "1");
3104 /* The following permits -d:Mod to accepts arguments following an =
3105 in the fashion that -MSome::Mod does. */
3106 if (*s == ':' || *s == '=') {
3107 const char *start = ++s;
3108 const char *const end = s + strlen(s);
3109 SV * const sv = newSVpvs("use Devel::");
3111 /* We now allow -d:Module=Foo,Bar */
3112 while(isALNUM(*s) || *s==':') ++s;
3114 sv_catpvn(sv, start, end - start);
3116 sv_catpvn(sv, start, s-start);
3117 /* Don't use NUL as q// delimiter here, this string goes in the
3119 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3122 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3126 PL_perldb = PERLDB_ALL;
3133 forbid_setid('D', FALSE);
3135 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3136 #else /* !DEBUGGING */
3137 if (ckWARN_d(WARN_DEBUGGING))
3138 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3139 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3140 for (s++; isALNUM(*s); s++) ;
3145 usage(PL_origargv[0]);
3148 Safefree(PL_inplace);
3149 #if defined(__CYGWIN__) /* do backup extension automagically */
3150 if (*(s+1) == '\0') {
3151 PL_inplace = savepvs(".bak");
3154 #endif /* __CYGWIN__ */
3156 const char * const start = ++s;
3157 while (*s && !isSPACE(*s))
3160 PL_inplace = savepvn(start, s - start);
3164 if (*s == '-') /* Additional switches on #! line. */
3168 case 'I': /* -I handled both here and in parse_body() */
3169 forbid_setid('I', FALSE);
3171 while (*s && isSPACE(*s))
3176 /* ignore trailing spaces (possibly followed by other switches) */
3178 for (e = p; *e && !isSPACE(*e); e++) ;
3182 } while (*p && *p != '-');
3183 e = savepvn(s, e-s);
3184 incpush(e, TRUE, TRUE, FALSE, FALSE, TRUE);
3191 Perl_croak(aTHX_ "No directory specified for -I");
3197 SvREFCNT_dec(PL_ors_sv);
3203 PL_ors_sv = newSVpvs("\n");
3204 numlen = 3 + (*s == '0');
3205 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3209 if (RsPARA(PL_rs)) {
3210 PL_ors_sv = newSVpvs("\n\n");
3213 PL_ors_sv = newSVsv(PL_rs);
3218 forbid_setid('M', FALSE); /* XXX ? */
3221 forbid_setid('m', FALSE); /* XXX ? */
3226 const char *use = "use ";
3228 /* -M-foo == 'no foo' */
3229 /* Leading space on " no " is deliberate, to make both
3230 possibilities the same length. */
3231 if (*s == '-') { use = " no "; ++s; }
3232 sv = newSVpvn(use,4);
3234 /* We allow -M'Module qw(Foo Bar)' */
3235 while(isALNUM(*s) || *s==':') {
3244 Perl_croak(aTHX_ "Module name required with -%c option",
3247 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3248 "contains single ':'",
3249 (int)(s - start), start, option);
3250 end = s + strlen(s);
3252 sv_catpvn(sv, start, end - start);
3253 if (option == 'm') {
3255 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3256 sv_catpvs( sv, " ()");
3259 sv_catpvn(sv, start, s-start);
3260 /* Use NUL as q''-delimiter. */
3261 sv_catpvs(sv, " split(/,/,q\0");
3263 sv_catpvn(sv, s, end - s);
3264 sv_catpvs(sv, "\0)");
3267 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3270 Perl_croak(aTHX_ "Missing argument to -%c", option);
3281 forbid_setid('s', FALSE);
3282 PL_doswitches = TRUE;
3296 #ifdef MACOS_TRADITIONAL
3297 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3299 PL_do_undump = TRUE;
3307 if (!sv_derived_from(PL_patchlevel, "version"))
3308 upg_version(PL_patchlevel, TRUE);
3310 PerlIO_printf(PerlIO_stdout(),
3311 "\nThis is perl, %"SVf
3313 SVfARG(vstringify(PL_patchlevel)),
3316 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3317 PerlIO_printf(PerlIO_stdout(),
3318 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3319 SVfARG(vstringify(PL_patchlevel))));
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ " built under %s at %s %s\n",
3322 OSNAME, __DATE__, __TIME__));
3323 PerlIO_printf(PerlIO_stdout(),
3324 Perl_form(aTHX_ " OS Specific Release: %s\n",
3327 #if defined PERL_PATCHNUM
3328 PerlIO_printf(PerlIO_stdout(),"\nCompiled from: %s",STRINGIFY(PERL_PATCHNUM));
3330 #if defined(LOCAL_PATCH_COUNT)
3331 if (LOCAL_PATCH_COUNT > 0)
3332 PerlIO_printf(PerlIO_stdout(),
3333 "\n(with %d registered patch%s, "
3334 "see perl -V for more detail)",
3336 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "\n\nCopyright 1987-2008, Larry Wall\n");
3341 #ifdef MACOS_TRADITIONAL
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3344 "maintained by Chris Nandor\n");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3353 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3358 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "atariST series port, ++jrb bammi@cadence.com\n");
3365 PerlIO_printf(PerlIO_stdout(),
3366 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3369 PerlIO_printf(PerlIO_stdout(),
3370 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3373 PerlIO_printf(PerlIO_stdout(),
3374 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3377 PerlIO_printf(PerlIO_stdout(),
3378 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3381 PerlIO_printf(PerlIO_stdout(),
3382 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3385 PerlIO_printf(PerlIO_stdout(),
3386 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3389 PerlIO_printf(PerlIO_stdout(),
3390 "MiNT port by Guido Flohr, 1997-1999\n");
3393 PerlIO_printf(PerlIO_stdout(),
3394 "EPOC port by Olaf Flebbe, 1999-2002\n");
3397 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3398 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3401 #ifdef __SYMBIAN32__
3402 PerlIO_printf(PerlIO_stdout(),
3403 "Symbian port by Nokia, 2004-2005\n");
3405 #ifdef BINARY_BUILD_NOTICE
3406 BINARY_BUILD_NOTICE;
3408 PerlIO_printf(PerlIO_stdout(),
3410 Perl may be copied only under the terms of either the Artistic License or the\n\
3411 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3412 Complete documentation for Perl, including FAQ lists, should be found on\n\
3413 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3414 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3417 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3418 PL_dowarn |= G_WARN_ON;
3423 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3424 if (!specialWARN(PL_compiling.cop_warnings))
3425 PerlMemShared_free(PL_compiling.cop_warnings);
3426 PL_compiling.cop_warnings = pWARN_ALL ;
3430 PL_dowarn = G_WARN_ALL_OFF;
3431 if (!specialWARN(PL_compiling.cop_warnings))
3432 PerlMemShared_free(PL_compiling.cop_warnings);
3433 PL_compiling.cop_warnings = pWARN_NONE ;
3440 if (s[0] == '-') /* Additional switches on #! line. */
3445 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3451 #ifdef ALTERNATE_SHEBANG
3452 case 'S': /* OS/2 needs -S on "extproc" line. */
3456 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3461 /* compliments of Tom Christiansen */
3463 /* unexec() can be found in the Gnu emacs distribution */
3464 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3467 Perl_my_unexec(pTHX)
3469 PERL_UNUSED_CONTEXT;
3471 SV * prog = newSVpv(BIN_EXP, 0);
3472 SV * file = newSVpv(PL_origfilename, 0);
3476 sv_catpvs(prog, "/perl");
3477 sv_catpvs(file, ".perldump");
3479 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3480 /* unexec prints msg to stderr in case of failure */
3481 PerlProc_exit(status);
3484 # include <lib$routines.h>
3485 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3486 # elif defined(WIN32) || defined(__CYGWIN__)
3487 Perl_croak(aTHX_ "dump is not supported");
3489 ABORT(); /* for use with undump */
3494 /* initialize curinterp */
3500 # define PERLVAR(var,type)
3501 # define PERLVARA(var,n,type)
3502 # if defined(PERL_IMPLICIT_CONTEXT)
3503 # define PERLVARI(var,type,init) aTHX->var = init;
3504 # define PERLVARIC(var,type,init) aTHX->var = init;
3506 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3507 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3509 # include "intrpvar.h"
3515 # define PERLVAR(var,type)
3516 # define PERLVARA(var,n,type)
3517 # define PERLVARI(var,type,init) PL_##var = init;
3518 # define PERLVARIC(var,type,init) PL_##var = init;
3519 # include "intrpvar.h"
3526 /* As these are inside a structure, PERLVARI isn't capable of initialising
3528 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3529 PL_reg_poscache = PL_reg_starttry = NULL;
3533 S_init_main_stash(pTHX)
3538 PL_curstash = PL_defstash = newHV();
3539 /* We know that the string "main" will be in the global shared string
3540 table, so it's a small saving to use it rather than allocate another
3542 PL_curstname = newSVpvs_share("main");
3543 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3544 /* If we hadn't caused another reference to "main" to be in the shared
3545 string table above, then it would be worth reordering these two,
3546 because otherwise all we do is delete "main" from it as a consequence
3547 of the SvREFCNT_dec, only to add it again with hv_name_set */
3548 SvREFCNT_dec(GvHV(gv));
3549 hv_name_set(PL_defstash, "main", 4, 0);
3550 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3552 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3554 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3555 GvMULTI_on(PL_incgv);
3556 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3557 GvMULTI_on(PL_hintgv);
3558 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3559 SvREFCNT_inc_simple_void(PL_defgv);
3560 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3561 SvREFCNT_inc_simple_void(PL_errgv);
3562 GvMULTI_on(PL_errgv);
3563 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3564 GvMULTI_on(PL_replgv);
3565 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3566 #ifdef PERL_DONT_CREATE_GVSV
3569 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3571 PL_curstash = PL_defstash;
3572 CopSTASH_set(&PL_compiling, PL_defstash);
3573 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3574 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3576 /* We must init $/ before switches are processed. */
3577 sv_setpvs(get_sv("/", TRUE), "\n");
3581 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3582 bool *suidscript, PerlIO **rsfpp)
3587 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3590 PL_origfilename = savepvs("-e");
3593 /* if find_script() returns, it returns a malloc()-ed value */
3594 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3596 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3597 const char *s = scriptname + 8;
3603 * Tell apart "normal" usage of fdscript, e.g.
3604 * with bash on FreeBSD:
3605 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3606 * from usage in suidperl.
3607 * Does any "normal" usage leave garbage after the number???
3608 * Is it a mistake to use a similar /dev/fd/ construct for
3613 * Be supersafe and do some sanity-checks.
3614 * Still, can we be sure we got the right thing?
3617 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3620 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3622 scriptname = savepv(s + 1);
3623 Safefree(PL_origfilename);
3624 PL_origfilename = (char *)scriptname;
3629 CopFILE_free(PL_curcop);
3630 CopFILE_set(PL_curcop, PL_origfilename);
3631 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3632 scriptname = (char *)"";
3633 if (fdscript >= 0) {
3634 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3635 # if defined(HAS_FCNTL) && defined(F_SETFD)
3637 /* ensure close-on-exec */
3638 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3643 Perl_croak(aTHX_ "sperl needs fd script\n"
3644 "You should not call sperl directly; do you need to "
3645 "change a #! line\nfrom sperl to perl?\n");
3648 * Do not open (or do other fancy stuff) while setuid.
3649 * Perl does the open, and hands script to suidperl on a fd;
3650 * suidperl only does some checks, sets up UIDs and re-execs
3651 * perl with that fd as it has always done.
3655 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3658 else if (!*scriptname) {
3659 forbid_setid(0, *suidscript);
3660 *rsfpp = PerlIO_stdin();
3663 #ifdef FAKE_BIT_BUCKET
3664 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3665 * is called) and still have the "-e" work. (Believe it or not,
3666 * a /dev/null is required for the "-e" to work because source
3667 * filter magic is used to implement it. ) This is *not* a general
3668 * replacement for a /dev/null. What we do here is create a temp
3669 * file (an empty file), open up that as the script, and then
3670 * immediately close and unlink it. Close enough for jazz. */
3671 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3672 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3673 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3674 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3675 FAKE_BIT_BUCKET_TEMPLATE
3677 const char * const err = "Failed to create a fake bit bucket";
3678 if (strEQ(scriptname, BIT_BUCKET)) {
3679 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3680 int tmpfd = mkstemp(tmpname);
3682 scriptname = tmpname;
3685 Perl_croak(aTHX_ err);
3688 scriptname = mktemp(tmpname);
3690 Perl_croak(aTHX_ err);
3695 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3696 #ifdef FAKE_BIT_BUCKET
3697 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3698 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3699 && strlen(scriptname) == sizeof(tmpname) - 1) {
3702 scriptname = BIT_BUCKET;
3704 # if defined(HAS_FCNTL) && defined(F_SETFD)
3706 /* ensure close-on-exec */
3707 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3710 #endif /* IAMSUID */
3712 /* PSz 16 Sep 03 Keep neat error message */
3714 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3716 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3717 CopFILE(PL_curcop), Strerror(errno));
3723 * I_SYSSTATVFS HAS_FSTATVFS
3725 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3726 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3727 * here so that metaconfig picks them up. */
3731 S_fd_on_nosuid_fs(pTHX_ int fd)
3734 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3735 * but is needed also on machines without setreuid.
3736 * Seems safe enough to run as root.
3738 int check_okay = 0; /* able to do all the required sys/libcalls */
3739 int on_nosuid = 0; /* the fd is on a nosuid fs */
3741 * Need to check noexec also: nosuid might not be set, the average
3742 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3744 int on_noexec = 0; /* the fd is on a noexec fs */
3747 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3748 * fstatvfs() is UNIX98.
3749 * fstatfs() is 4.3 BSD.
3750 * ustat()+getmnt() is pre-4.3 BSD.
3751 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3752 * an irrelevant filesystem while trying to reach the right one.
3755 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3757 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3758 defined(HAS_FSTATVFS)
3759 # define FD_ON_NOSUID_CHECK_OKAY
3760 struct statvfs stfs;
3762 check_okay = fstatvfs(fd, &stfs) == 0;
3763 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3765 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3766 on platforms where it is present. */
3767 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3769 # endif /* fstatvfs */
3771 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3772 defined(PERL_MOUNT_NOSUID) && \
3773 defined(PERL_MOUNT_NOEXEC) && \
3774 defined(HAS_FSTATFS) && \
3775 defined(HAS_STRUCT_STATFS) && \
3776 defined(HAS_STRUCT_STATFS_F_FLAGS)
3777 # define FD_ON_NOSUID_CHECK_OKAY
3780 check_okay = fstatfs(fd, &stfs) == 0;
3781 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3782 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3783 # endif /* fstatfs */
3785 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3786 defined(PERL_MOUNT_NOSUID) && \
3787 defined(PERL_MOUNT_NOEXEC) && \
3788 defined(HAS_FSTAT) && \
3789 defined(HAS_USTAT) && \
3790 defined(HAS_GETMNT) && \
3791 defined(HAS_STRUCT_FS_DATA) && \
3793 # define FD_ON_NOSUID_CHECK_OKAY
3796 if (fstat(fd, &fdst) == 0) {
3798 if (ustat(fdst.st_dev, &us) == 0) {
3800 /* NOSTAT_ONE here because we're not examining fields which
3801 * vary between that case and STAT_ONE. */
3802 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3803 size_t cmplen = sizeof(us.f_fname);
3804 if (sizeof(fsd.fd_req.path) < cmplen)
3805 cmplen = sizeof(fsd.fd_req.path);
3806 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3807 fdst.st_dev == fsd.fd_req.dev) {
3809 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3810 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3815 # endif /* fstat+ustat+getmnt */
3817 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3818 defined(HAS_GETMNTENT) && \
3819 defined(HAS_HASMNTOPT) && \
3820 defined(MNTOPT_NOSUID) && \
3821 defined(MNTOPT_NOEXEC)
3822 # define FD_ON_NOSUID_CHECK_OKAY
3823 FILE *mtab = fopen("/etc/mtab", "r");
3824 struct mntent *entry;
3827 if (mtab && (fstat(fd, &stb) == 0)) {
3828 while (entry = getmntent(mtab)) {
3829 if (stat(entry->mnt_dir, &fsb) == 0
3830 && fsb.st_dev == stb.st_dev)
3832 /* found the filesystem */
3834 if (hasmntopt(entry, MNTOPT_NOSUID))
3836 if (hasmntopt(entry, MNTOPT_NOEXEC))
3839 } /* A single fs may well fail its stat(). */
3844 # endif /* getmntent+hasmntopt */
3847 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3849 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3851 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3852 return ((!check_okay) || on_nosuid || on_noexec);
3854 #endif /* IAMSUID */
3858 S_validate_suid(pTHX_ const char *validarg,
3860 const char *scriptname,
3866 SV *linestr_sv, PerlIO *rsfp)
3871 PERL_ARGS_ASSERT_VALIDATE_SUID;
3873 /* do we need to emulate setuid on scripts? */
3875 /* This code is for those BSD systems that have setuid #! scripts disabled
3876 * in the kernel because of a security problem. Merely defining DOSUID
3877 * in perl will not fix that problem, but if you have disabled setuid
3878 * scripts in the kernel, this will attempt to emulate setuid and setgid
3879 * on scripts that have those now-otherwise-useless bits set. The setuid
3880 * root version must be called suidperl or sperlN.NNN. If regular perl
3881 * discovers that it has opened a setuid script, it calls suidperl with
3882 * the same argv that it had. If suidperl finds that the script it has
3883 * just opened is NOT setuid root, it sets the effective uid back to the
3884 * uid. We don't just make perl setuid root because that loses the
3885 * effective uid we had before invoking perl, if it was different from the
3888 * Description/comments above do not match current workings:
3889 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3890 * suidperl called with script open and name changed to /dev/fd/N/X;
3891 * suidperl croaks if script is not setuid;
3892 * making perl setuid would be a huge security risk (and yes, that
3893 * would lose any euid we might have had).
3895 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3896 * be defined in suidperl only. suidperl must be setuid root. The
3897 * Configure script will set this up for you if you want it.
3900 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3901 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3902 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3904 const char *linestr;
3908 if (fdscript < 0 || !suidscript)
3909 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3911 * Since the script is opened by perl, not suidperl, some of these
3912 * checks are superfluous. Leaving them in probably does not lower
3916 * Do checks even for systems with no HAS_SETREUID.
3917 * We used to swap, then re-swap UIDs with
3918 # ifdef HAS_SETREUID
3919 if (setreuid(PL_euid,PL_uid) < 0
3920 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3921 Perl_croak(aTHX_ "Can't swap uid and euid");
3923 # ifdef HAS_SETREUID
3924 if (setreuid(PL_uid,PL_euid) < 0
3925 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3926 Perl_croak(aTHX_ "Can't reswap uid and euid");
3930 /* On this access check to make sure the directories are readable,
3931 * there is actually a small window that the user could use to make
3932 * filename point to an accessible directory. So there is a faint
3933 * chance that someone could execute a setuid script down in a
3934 * non-accessible directory. I don't know what to do about that.
3935 * But I don't think it's too important. The manual lies when
3936 * it says access() is useful in setuid programs.
3938 * So, access() is pretty useless... but not harmful... do anyway.
3940 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3941 Perl_croak(aTHX_ "Can't access() script\n");
3944 /* If we can swap euid and uid, then we can determine access rights
3945 * with a simple stat of the file, and then compare device and
3946 * inode to make sure we did stat() on the same file we opened.
3947 * Then we just have to make sure he or she can execute it.
3950 * As the script is opened by perl, not suidperl, we do not need to
3951 * care much about access rights.
3953 * The 'script changed' check is needed, or we can get lied to
3954 * about $0 with e.g.
3955 * suidperl /dev/fd/4//bin/x 4<setuidscript
3956 * Without HAS_SETREUID, is it safe to stat() as root?
3958 * Are there any operating systems that pass /dev/fd/xxx for setuid
3959 * scripts, as suggested/described in perlsec(1)? Surely they do not
3960 * pass the script name as we do, so the "script changed" test would
3961 * fail for them... but we never get here with
3962 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3964 * This is one place where we must "lie" about return status: not
3965 * say if the stat() failed. We are doing this as root, and could
3966 * be tricked into reporting existence or not of files that the
3967 * "plain" user cannot even see.
3971 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3972 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3973 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3974 Perl_croak(aTHX_ "Setuid script changed\n");
3978 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3979 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3982 * We used to do this check as the "plain" user (after swapping
3983 * UIDs). But the check for nosuid and noexec filesystem is needed,
3984 * and should be done even without HAS_SETREUID. (Maybe those
3985 * operating systems do not have such mount options anyway...)
3986 * Seems safe enough to do as root.
3988 # if !defined(NO_NOSUID_CHECK)
3989 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3990 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3993 # endif /* IAMSUID */
3995 if (!S_ISREG(PL_statbuf.st_mode)) {
3996 Perl_croak(aTHX_ "Setuid script not plain file\n");
3998 if (PL_statbuf.st_mode & S_IWOTH)
3999 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4000 PL_doswitches = FALSE; /* -s is insecure in suid */
4001 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4002 CopLINE_inc(PL_curcop);
4003 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4004 Perl_croak(aTHX_ "No #! line");
4005 linestr = SvPV_nolen_const(linestr_sv);
4006 /* required even on Sys V */
4007 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4008 Perl_croak(aTHX_ "No #! line");
4012 /* Sanity check on line length */
4013 s_end = s + strlen(s);
4014 if (s_end == s || (s_end - s) > 4000)
4015 Perl_croak(aTHX_ "Very long #! line");
4016 /* Allow more than a single space after #! */
4017 while (isSPACE(*s)) s++;
4018 /* Sanity check on buffer end */
4019 while ((*s) && !isSPACE(*s)) s++;
4020 for (s2 = s; (s2 > linestr &&
4021 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4022 || s2[-1] == '-')); s2--) ;
4023 /* Sanity check on buffer start */
4024 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4025 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4026 Perl_croak(aTHX_ "Not a perl script");
4027 while (*s == ' ' || *s == '\t') s++;
4029 * #! arg must be what we saw above. They can invoke it by
4030 * mentioning suidperl explicitly, but they may not add any strange
4031 * arguments beyond what #! says if they do invoke suidperl that way.
4034 * The way validarg was set up, we rely on the kernel to start
4035 * scripts with argv[1] set to contain all #! line switches (the
4039 * Check that we got all the arguments listed in the #! line (not
4040 * just that there are no extraneous arguments). Might not matter
4041 * much, as switches from #! line seem to be acted upon (also), and
4042 * so may be checked and trapped in perl. But, security checks must
4043 * be done in suidperl and not deferred to perl. Note that suidperl
4044 * does not get around to parsing (and checking) the switches on
4045 * the #! line (but execs perl sooner).
4046 * Allow (require) a trailing newline (which may be of two
4047 * characters on some architectures?) (but no other trailing
4050 len = strlen(validarg);
4051 if (strEQ(validarg," PHOOEY ") ||
4052 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4053 !((s_end - s) == len+1
4054 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4055 Perl_croak(aTHX_ "Args must match #! line");
4059 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4060 PL_euid == PL_statbuf.st_uid)
4062 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4063 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4064 # endif /* IAMSUID */
4067 PL_euid) { /* oops, we're not the setuid root perl */
4069 * When root runs a setuid script, we do not go through the same
4070 * steps of execing sperl and then perl with fd scripts, but
4071 * simply set up UIDs within the same perl invocation; so do
4072 * not have the same checks (on options, whatever) that we have
4073 * for plain users. No problem really: would have to be a script
4074 * that does not actually work for plain users; and if root is
4075 * foolish and can be persuaded to run such an unsafe script, he
4076 * might run also non-setuid ones, and deserves what he gets.
4078 * Or, we might drop the PL_euid check above (and rely just on
4079 * fdscript to avoid loops), and do the execs
4085 * Pass fd script to suidperl.
4086 * Exec suidperl, substituting fd script for scriptname.
4087 * Pass script name as "subdir" of fd, which perl will grok;
4088 * in fact will use that to distinguish this from "normal"
4089 * usage, see comments above.
4091 PerlIO_rewind(rsfp);
4092 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4093 /* PSz 27 Feb 04 Sanity checks on scriptname */
4094 if ((!scriptname) || (!*scriptname) ) {
4095 Perl_croak(aTHX_ "No setuid script name\n");
4097 if (*scriptname == '-') {
4098 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4099 /* Or we might confuse it with an option when replacing
4100 * name in argument list, below (though we do pointer, not
4101 * string, comparisons).
4104 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4105 if (!PL_origargv[which]) {
4106 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4108 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4109 PerlIO_fileno(rsfp), PL_origargv[which]));
4110 # if defined(HAS_FCNTL) && defined(F_SETFD)
4111 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4114 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4115 (int)PERL_REVISION, (int)PERL_VERSION,
4116 (int)PERL_SUBVERSION), PL_origargv);
4118 # endif /* IAMSUID */
4119 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4122 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4124 * This seems back to front: we try HAS_SETEGID first; if not available
4125 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4126 * in the sense that we only want to set EGID; but are there any machines
4127 * with either of the latter, but not the former? Same with UID, later.
4130 (void)setegid(PL_statbuf.st_gid);
4132 # ifdef HAS_SETREGID
4133 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4135 # ifdef HAS_SETRESGID
4136 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4138 PerlProc_setgid(PL_statbuf.st_gid);
4142 if (PerlProc_getegid() != PL_statbuf.st_gid)
4143 Perl_croak(aTHX_ "Can't do setegid!\n");
4145 if (PL_statbuf.st_mode & S_ISUID) {
4146 if (PL_statbuf.st_uid != PL_euid)
4148 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4150 # ifdef HAS_SETREUID
4151 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4153 # ifdef HAS_SETRESUID
4154 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4156 PerlProc_setuid(PL_statbuf.st_uid);
4160 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4161 Perl_croak(aTHX_ "Can't do seteuid!\n");
4163 else if (PL_uid) { /* oops, mustn't run as root */
4165 (void)seteuid((Uid_t)PL_uid);
4167 # ifdef HAS_SETREUID
4168 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4170 # ifdef HAS_SETRESUID
4171 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4173 PerlProc_setuid((Uid_t)PL_uid);
4177 if (PerlProc_geteuid() != PL_uid)
4178 Perl_croak(aTHX_ "Can't do seteuid!\n");
4181 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4182 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4185 else if (fdscript < 0 || !suidscript)
4186 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4187 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4189 /* PSz 16 Sep 03 Keep neat error message */
4190 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4193 /* We absolutely must clear out any saved ids here, so we */
4194 /* exec the real perl, substituting fd script for scriptname. */
4195 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4197 * It might be thought that using setresgid and/or setresuid (changed to
4198 * set the saved IDs) above might obviate the need to exec, and we could
4199 * go on to "do the perl thing".
4201 * Is there such a thing as "saved GID", and is that set for setuid (but
4202 * not setgid) execution like suidperl? Without exec, it would not be
4203 * cleared for setuid (but not setgid) scripts (or might need a dummy
4206 * We need suidperl to do the exact same argument checking that perl
4207 * does. Thus it cannot be very small; while it could be significantly
4208 * smaller, it is safer (simpler?) to make it essentially the same
4209 * binary as perl (but they are not identical). - Maybe could defer that
4210 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4211 * but prefer to do thorough checks in suidperl itself. Such deferral
4212 * would make suidperl security rely on perl, a design no-no.
4214 * Setuid things should be short and simple, thus easy to understand and
4215 * verify. They should do their "own thing", without influence by
4216 * attackers. It may help if their internal execution flow is fixed,
4217 * regardless of platform: it may be best to exec anyway.
4219 * Suidperl should at least be conceptually simple: a wrapper only,
4220 * never to do any real perl. Maybe we should put
4222 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4224 * into the perly bits.
4226 PerlIO_rewind(rsfp);
4227 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4229 * Keep original arguments: suidperl already has fd script.
4231 # if defined(HAS_FCNTL) && defined(F_SETFD)
4232 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4235 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4236 (int)PERL_REVISION, (int)PERL_VERSION,
4237 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4239 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4240 # endif /* IAMSUID */
4245 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4246 /* Don't even need this function. */
4249 S_validate_suid(pTHX_ PerlIO *rsfp)
4251 PERL_ARGS_ASSERT_VALIDATE_SUID;
4253 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4254 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4257 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4258 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4260 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4263 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4264 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4265 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4266 /* not set-id, must be wrapped */
4269 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4273 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4277 register const char *s2;
4278 #ifdef MACOS_TRADITIONAL
4282 PERL_ARGS_ASSERT_FIND_BEGINNING;
4284 /* skip forward in input to the real script? */
4286 #ifdef MACOS_TRADITIONAL
4287 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4289 while (PL_doextract || gMacPerl_AlwaysExtract) {
4290 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4291 if (!gMacPerl_AlwaysExtract)
4292 Perl_croak(aTHX_ "No Perl script found in input\n");
4294 if (PL_doextract) /* require explicit override ? */
4295 if (!OverrideExtract(PL_origfilename))
4296 Perl_croak(aTHX_ "User aborted script\n");
4298 PL_doextract = FALSE;
4300 /* Pater peccavi, file does not have #! */
4301 PerlIO_rewind(rsfp);
4306 while (PL_doextract) {
4307 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4308 Perl_croak(aTHX_ "No Perl script found in input\n");
4311 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4312 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4313 PL_doextract = FALSE;
4314 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4316 while (*s == ' ' || *s == '\t') s++;
4318 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4319 || s2[-1] == '_') s2--;
4320 if (strnEQ(s2-4,"perl",4))
4321 while ((s = moreswitches(s)))
4324 #ifdef MACOS_TRADITIONAL
4325 /* We are always searching for the #!perl line in MacPerl,
4326 * so if we find it, still keep the line count correct
4327 * by counting lines we already skipped over
4329 for (; maclines > 0 ; maclines--)
4330 PerlIO_ungetc(rsfp, '\n');
4334 /* gMacPerl_AlwaysExtract is false in MPW tool */
4335 } else if (gMacPerl_AlwaysExtract) {
4347 PL_uid = PerlProc_getuid();
4348 PL_euid = PerlProc_geteuid();
4349 PL_gid = PerlProc_getgid();
4350 PL_egid = PerlProc_getegid();
4352 PL_uid |= PL_gid << 16;
4353 PL_euid |= PL_egid << 16;
4355 /* Should not happen: */
4356 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4357 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4360 * Should go by suidscript, not uid!=euid: why disallow
4361 * system("ls") in scripts run from setuid things?
4362 * Or, is this run before we check arguments and set suidscript?
4363 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4364 * (We never have suidscript, can we be sure to have fdscript?)
4365 * Or must then go by UID checks? See comments in forbid_setid also.
4369 /* This is used very early in the lifetime of the program,
4370 * before even the options are parsed, so PL_tainting has
4371 * not been initialized properly. */
4373 Perl_doing_taint(int argc, char *argv[], char *envp[])
4375 #ifndef PERL_IMPLICIT_SYS
4376 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4377 * before we have an interpreter-- and the whole point of this
4378 * function is to be called at such an early stage. If you are on
4379 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4380 * "tainted because running with altered effective ids', you'll
4381 * have to add your own checks somewhere in here. The two most
4382 * known samples of 'implicitness' are Win32 and NetWare, neither
4383 * of which has much of concept of 'uids'. */
4384 int uid = PerlProc_getuid();
4385 int euid = PerlProc_geteuid();
4386 int gid = PerlProc_getgid();
4387 int egid = PerlProc_getegid();
4394 if (uid && (euid != uid || egid != gid))
4396 #endif /* !PERL_IMPLICIT_SYS */
4397 /* This is a really primitive check; environment gets ignored only
4398 * if -T are the first chars together; otherwise one gets
4399 * "Too late" message. */
4400 if ( argc > 1 && argv[1][0] == '-'
4401 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4406 /* Passing the flag as a single char rather than a string is a slight space
4407 optimisation. The only message that isn't /^-.$/ is
4408 "program input from stdin", which is substituted in place of '\0', which
4409 could never be a command line flag. */
4411 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4414 char string[3] = "-x";
4415 const char *message = "program input from stdin";
4422 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4423 if (PL_euid != PL_uid)
4424 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4425 if (PL_egid != PL_gid)
4426 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4427 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4429 * Checks for UID/GID above "wrong": why disallow
4430 * perl -e 'print "Hello\n"'
4431 * from within setuid things?? Simply drop them: replaced by
4432 * fdscript/suidscript and #ifdef IAMSUID checks below.
4434 * This may be too late for command-line switches. Will catch those on
4435 * the #! line, after finding the script name and setting up
4436 * fdscript/suidscript. Note that suidperl does not get around to
4437 * parsing (and checking) the switches on the #! line, but checks that
4438 * the two sets are identical.
4440 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4441 * instead, or would that be "too late"? (We never have suidscript, can
4442 * we be sure to have fdscript?)
4444 * Catch things with suidscript (in descendant of suidperl), even with
4445 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4446 * below; but I am paranoid.
4448 * Also see comments about root running a setuid script, elsewhere.
4451 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4453 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4454 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4455 #endif /* IAMSUID */
4459 Perl_init_debugger(pTHX)
4462 HV * const ostash = PL_curstash;
4464 PL_curstash = PL_debstash;
4465 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4467 AvREAL_off(PL_dbargs);
4468 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4469 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4470 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4471 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4472 sv_setiv(PL_DBsingle, 0);
4473 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4474 sv_setiv(PL_DBtrace, 0);
4475 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4476 sv_setiv(PL_DBsignal, 0);
4477 PL_curstash = ostash;
4480 #ifndef STRESS_REALLOC
4481 #define REASONABLE(size) (size)
4483 #define REASONABLE(size) (1) /* unreasonable */
4487 Perl_init_stacks(pTHX)
4490 /* start with 128-item stack and 8K cxstack */
4491 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4492 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4493 PL_curstackinfo->si_type = PERLSI_MAIN;
4494 PL_curstack = PL_curstackinfo->si_stack;
4495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4497 PL_stack_base = AvARRAY(PL_curstack);
4498 PL_stack_sp = PL_stack_base;
4499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4501 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4504 PL_tmps_max = REASONABLE(128);
4506 Newx(PL_markstack,REASONABLE(32),I32);
4507 PL_markstack_ptr = PL_markstack;
4508 PL_markstack_max = PL_markstack + REASONABLE(32);
4512 Newx(PL_scopestack,REASONABLE(32),I32);
4513 PL_scopestack_ix = 0;
4514 PL_scopestack_max = REASONABLE(32);
4516 Newx(PL_savestack,REASONABLE(128),ANY);
4517 PL_savestack_ix = 0;
4518 PL_savestack_max = REASONABLE(128);
4527 while (PL_curstackinfo->si_next)
4528 PL_curstackinfo = PL_curstackinfo->si_next;
4529 while (PL_curstackinfo) {
4530 PERL_SI *p = PL_curstackinfo->si_prev;
4531 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4532 Safefree(PL_curstackinfo->si_cxstack);
4533 Safefree(PL_curstackinfo);
4534 PL_curstackinfo = p;
4536 Safefree(PL_tmps_stack);
4537 Safefree(PL_markstack);
4538 Safefree(PL_scopestack);
4539 Safefree(PL_savestack);
4544 S_init_predump_symbols(pTHX)
4550 sv_setpvs(get_sv("\"", TRUE), " ");
4551 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4553 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4554 GvMULTI_on(PL_stdingv);
4555 io = GvIOp(PL_stdingv);
4556 IoTYPE(io) = IoTYPE_RDONLY;
4557 IoIFP(io) = PerlIO_stdin();
4558 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4560 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4562 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4565 IoTYPE(io) = IoTYPE_WRONLY;
4566 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4568 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4570 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4572 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4573 GvMULTI_on(PL_stderrgv);
4574 io = GvIOp(PL_stderrgv);
4575 IoTYPE(io) = IoTYPE_WRONLY;
4576 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4577 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4579 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4581 PL_statname = newSV(0); /* last filename we did stat on */
4583 Safefree(PL_osname);
4584 PL_osname = savepv(OSNAME);
4588 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4592 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4594 argc--,argv++; /* skip name of script */
4595 if (PL_doswitches) {
4596 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4600 if (argv[0][1] == '-' && !argv[0][2]) {
4604 if ((s = strchr(argv[0], '='))) {
4605 const char *const start_name = argv[0] + 1;
4606 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4607 TRUE, SVt_PV)), s + 1);
4610 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4613 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4614 GvMULTI_on(PL_argvgv);
4615 (void)gv_AVadd(PL_argvgv);
4616 av_clear(GvAVn(PL_argvgv));
4617 for (; argc > 0; argc--,argv++) {
4618 SV * const sv = newSVpv(argv[0],0);
4619 av_push(GvAVn(PL_argvgv),sv);
4620 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4621 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4624 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4625 (void)sv_utf8_decode(sv);
4631 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4636 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4638 PL_toptarget = newSV_type(SVt_PVFM);
4639 sv_setpvs(PL_toptarget, "");
4640 PL_bodytarget = newSV_type(SVt_PVFM);
4641 sv_setpvs(PL_bodytarget, "");
4642 PL_formtarget = PL_bodytarget;
4646 init_argv_symbols(argc,argv);
4648 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4649 #ifdef MACOS_TRADITIONAL
4650 /* $0 is not majick on a Mac */
4651 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4653 sv_setpv(GvSV(tmpgv),PL_origfilename);
4655 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4657 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4661 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4663 bool env_is_not_environ;
4664 GvMULTI_on(PL_envgv);
4665 hv = GvHVn(PL_envgv);
4666 hv_magic(hv, NULL, PERL_MAGIC_env);
4668 #ifdef USE_ENVIRON_ARRAY
4669 /* Note that if the supplied env parameter is actually a copy
4670 of the global environ then it may now point to free'd memory
4671 if the environment has been modified since. To avoid this
4672 problem we treat env==NULL as meaning 'use the default'
4676 env_is_not_environ = env != environ;
4677 if (env_is_not_environ
4678 # ifdef USE_ITHREADS
4679 && PL_curinterp == aTHX
4688 for (; *env; env++) {
4691 if (!(s = strchr(old_var,'=')) || s == old_var)
4694 #if defined(MSDOS) && !defined(DJGPP)
4696 (void)strupr(old_var);
4699 sv = newSVpv(s+1, 0);
4700 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4701 if (env_is_not_environ)
4705 #endif /* USE_ENVIRON_ARRAY */
4706 #endif /* !PERL_MICRO */
4709 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4710 SvREADONLY_off(GvSV(tmpgv));
4711 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4712 SvREADONLY_on(GvSV(tmpgv));
4714 #ifdef THREADS_HAVE_PIDS
4715 PL_ppid = (IV)getppid();
4718 /* touch @F array to prevent spurious warnings 20020415 MJD */
4720 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4725 S_init_perllib(pTHX)
4731 s = PerlEnv_getenv("PERL5LIB");
4733 * It isn't possible to delete an environment variable with
4734 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4735 * case we treat PERL5LIB as undefined if it has a zero-length value.
4737 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4738 if (s && *s != '\0')
4742 incpush(s, TRUE, TRUE, TRUE, FALSE, FALSE);
4744 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE, FALSE);
4746 /* Treat PERL5?LIB as a possible search list logical name -- the
4747 * "natural" VMS idiom for a Unix path string. We allow each
4748 * element to be a set of |-separated directories for compatibility.
4752 if (my_trnlnm("PERL5LIB",buf,0))
4753 do { incpush(buf,TRUE,TRUE,TRUE,FALSE, FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4755 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE, FALSE);
4759 /* Use the ~-expanded versions of APPLLIB (undocumented),
4760 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4763 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE, FALSE);
4767 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4769 #ifdef MACOS_TRADITIONAL
4772 SV * privdir = newSV(0);
4773 char * macperl = PerlEnv_getenv("MACPERL");
4778 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4779 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4780 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4781 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4782 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4783 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4785 SvREFCNT_dec(privdir);
4788 incpush(":", FALSE, FALSE, FALSE, FALSE, FALSE);
4791 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4794 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4796 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4800 /* sitearch is always relative to sitelib on Windows for
4801 * DLL-based path intuition to work correctly */
4802 # if !defined(WIN32)
4803 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4809 /* this picks up sitearch as well */
4810 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4812 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4816 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4817 /* Search for version-specific dirs below here */
4818 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4821 #ifdef PERL_VENDORARCH_EXP
4822 /* vendorarch is always relative to vendorlib on Windows for
4823 * DLL-based path intuition to work correctly */
4824 # if !defined(WIN32)
4825 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4829 #ifdef PERL_VENDORLIB_EXP
4831 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE); /* this picks up vendorarch as well */
4833 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4837 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4838 /* Search for version-specific dirs below here */
4839 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4842 #ifdef PERL_OTHERLIBDIRS
4843 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE, FALSE);
4847 incpush(".", FALSE, FALSE, FALSE, FALSE, FALSE);
4848 #endif /* MACOS_TRADITIONAL */
4851 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4852 # define PERLLIB_SEP ';'
4855 # define PERLLIB_SEP '|'
4857 # if defined(MACOS_TRADITIONAL)
4858 # define PERLLIB_SEP ','
4860 # define PERLLIB_SEP ':'
4864 #ifndef PERLLIB_MANGLE
4865 # define PERLLIB_MANGLE(s,n) (s)
4868 /* Push a directory onto @INC if it exists.
4869 Generate a new SV if we do this, to save needing to copy the SV we push
4872 S_incpush_if_exists(pTHX_ SV *dir)
4877 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4879 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4880 S_ISDIR(tmpstatbuf.st_mode)) {
4881 av_push(GvAVn(PL_incgv), dir);
4888 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4889 bool canrelocate, bool unshift)
4893 const char *p = dir;
4898 if (addsubdirs || addoldvers) {
4902 /* Break at all separators */
4904 SV *libdir = newSV(0);
4907 /* skip any consecutive separators */
4909 while ( *p == PERLLIB_SEP ) {
4910 /* Uncomment the next line for PATH semantics */
4911 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4916 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4917 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4922 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4923 p = NULL; /* break out */
4925 #ifdef MACOS_TRADITIONAL
4926 if (!strchr(SvPVX(libdir), ':')) {
4929 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4931 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4932 sv_catpvs(libdir, ":");
4935 /* Do the if() outside the #ifdef to avoid warnings about an unused
4938 #ifdef PERL_RELOCATABLE_INC
4940 * Relocatable include entries are marked with a leading .../
4943 * 0: Remove that leading ".../"
4944 * 1: Remove trailing executable name (anything after the last '/')
4945 * from the perl path to give a perl prefix
4947 * While the @INC element starts "../" and the prefix ends with a real
4948 * directory (ie not . or ..) chop that real directory off the prefix
4949 * and the leading "../" from the @INC element. ie a logical "../"
4951 * Finally concatenate the prefix and the remainder of the @INC element
4952 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4953 * generates /usr/local/lib/perl5
4955 const char *libpath = SvPVX(libdir);
4956 STRLEN libpath_len = SvCUR(libdir);
4957 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4959 SV * const caret_X = get_sv("\030", 0);
4960 /* Going to use the SV just as a scratch buffer holding a C
4966 /* $^X is *the* source of taint if tainting is on, hence
4967 SvPOK() won't be true. */
4969 assert(SvPOKp(caret_X));
4970 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4972 /* Firstly take off the leading .../
4973 If all else fail we'll do the paths relative to the current
4975 sv_chop(libdir, libpath + 4);
4976 /* Don't use SvPV as we're intentionally bypassing taining,
4977 mortal copies that the mg_get of tainting creates, and
4978 corruption that seems to come via the save stack.
4979 I guess that the save stack isn't correctly set up yet. */
4980 libpath = SvPVX(libdir);
4981 libpath_len = SvCUR(libdir);
4983 /* This would work more efficiently with memrchr, but as it's
4984 only a GNU extension we'd need to probe for it and
4985 implement our own. Not hard, but maybe not worth it? */
4987 prefix = SvPVX(prefix_sv);
4988 lastslash = strrchr(prefix, '/');
4990 /* First time in with the *lastslash = '\0' we just wipe off
4991 the trailing /perl from (say) /usr/foo/bin/perl
4995 while ((*lastslash = '\0'), /* Do that, come what may. */
4996 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4997 && (lastslash = strrchr(prefix, '/')))) {
4998 if (lastslash[1] == '\0'
4999 || (lastslash[1] == '.'
5000 && (lastslash[2] == '/' /* ends "/." */
5001 || (lastslash[2] == '/'
5002 && lastslash[3] == '/' /* or "/.." */
5004 /* Prefix ends "/" or "/." or "/..", any of which
5005 are fishy, so don't do any more logical cleanup.
5009 /* Remove leading "../" from path */
5012 /* Next iteration round the loop removes the last
5013 directory name from prefix by writing a '\0' in
5014 the while clause. */
5016 /* prefix has been terminated with a '\0' to the correct
5017 length. libpath points somewhere into the libdir SV.
5018 We need to join the 2 with '/' and drop the result into
5020 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5021 SvREFCNT_dec(libdir);
5022 /* And this is the new libdir. */
5025 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5026 /* Need to taint reloccated paths if running set ID */
5027 SvTAINTED_on(libdir);
5030 SvREFCNT_dec(prefix_sv);
5035 * BEFORE pushing libdir onto @INC we may first push version- and
5036 * archname-specific sub-directories.
5038 if (addsubdirs || addoldvers) {
5039 #ifdef PERL_INC_VERSION_LIST
5040 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5041 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5042 const char * const *incver;
5048 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5050 while (unix[len-1] == '/') len--; /* Cosmetic */
5051 sv_usepvn(libdir,unix,len);
5054 PerlIO_printf(Perl_error_log,
5055 "Failed to unixify @INC element \"%s\"\n",
5059 #ifdef MACOS_TRADITIONAL
5060 #define PERL_AV_SUFFIX_FMT ""
5061 #define PERL_ARCH_FMT "%s:"
5062 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5064 #define PERL_AV_SUFFIX_FMT "/"
5065 #define PERL_ARCH_FMT "/%s"
5066 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5068 /* .../version/archname if -d .../version/archname */
5069 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5071 (int)PERL_REVISION, (int)PERL_VERSION,
5072 (int)PERL_SUBVERSION, ARCHNAME);
5073 subdir = S_incpush_if_exists(aTHX_ subdir);
5075 /* .../version if -d .../version */
5076 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5078 (int)PERL_REVISION, (int)PERL_VERSION,
5079 (int)PERL_SUBVERSION);
5080 subdir = S_incpush_if_exists(aTHX_ subdir);
5082 /* .../archname if -d .../archname */
5083 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5084 SVfARG(libdir), ARCHNAME);
5085 subdir = S_incpush_if_exists(aTHX_ subdir);
5089 #ifdef PERL_INC_VERSION_LIST
5091 for (incver = incverlist; *incver; incver++) {
5092 /* .../xxx if -d .../xxx */
5093 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5094 SVfARG(libdir), *incver);
5095 subdir = S_incpush_if_exists(aTHX_ subdir);
5101 /* finally add this lib directory at the end of @INC */
5103 av_unshift( GvAVn( PL_incgv ), 1 );
5104 av_store( GvAVn( PL_incgv ), 0, libdir );
5107 av_push(GvAVn(PL_incgv), libdir);
5111 assert (SvREFCNT(subdir) == 1);
5112 SvREFCNT_dec(subdir);
5118 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5122 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5128 PERL_ARGS_ASSERT_CALL_LIST;
5130 while (av_len(paramList) >= 0) {
5131 cv = MUTABLE_CV(av_shift(paramList));
5133 if (paramList == PL_beginav) {
5134 /* save PL_beginav for compiler */
5135 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5137 else if (paramList == PL_checkav) {
5138 /* save PL_checkav for compiler */
5139 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5141 else if (paramList == PL_unitcheckav) {
5142 /* save PL_unitcheckav for compiler */
5143 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5154 PL_madskills |= 16384;
5159 PL_madskills &= ~16384;
5162 (void)SvPV_const(atsv, len);
5164 PL_curcop = &PL_compiling;
5165 CopLINE_set(PL_curcop, oldline);
5166 if (paramList == PL_beginav)
5167 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5169 Perl_sv_catpvf(aTHX_ atsv,
5170 "%s failed--call queue aborted",
5171 paramList == PL_checkav ? "CHECK"
5172 : paramList == PL_initav ? "INIT"
5173 : paramList == PL_unitcheckav ? "UNITCHECK"
5175 while (PL_scopestack_ix > oldscope)
5178 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5185 /* my_exit() was called */
5186 while (PL_scopestack_ix > oldscope)
5189 PL_curstash = PL_defstash;
5190 PL_curcop = &PL_compiling;
5191 CopLINE_set(PL_curcop, oldline);
5193 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5194 if (paramList == PL_beginav)
5195 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5197 Perl_croak(aTHX_ "%s failed--call queue aborted",
5198 paramList == PL_checkav ? "CHECK"
5199 : paramList == PL_initav ? "INIT"
5200 : paramList == PL_unitcheckav ? "UNITCHECK"
5207 PL_curcop = &PL_compiling;
5208 CopLINE_set(PL_curcop, oldline);
5211 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5220 Perl_my_exit(pTHX_ U32 status)
5231 STATUS_EXIT_SET(status);
5238 Perl_my_failure_exit(pTHX)
5242 /* We have been called to fall on our sword. The desired exit code
5243 * should be already set in STATUS_UNIX, but could be shifted over
5244 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5247 * If an error code has not been set, then force the issue.
5249 if (MY_POSIX_EXIT) {
5251 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5252 * the exit code when there isn't an error.
5255 if (STATUS_UNIX == 0)
5256 STATUS_UNIX_EXIT_SET(255);
5258 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5260 /* The exit code could have been set by $? or vmsish which
5261 * means that it may not be fatal. So convert
5262 * success/warning codes to fatal.
5264 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5265 STATUS_UNIX_EXIT_SET(255);
5269 /* Traditionally Perl on VMS always expects a Fatal Error. */
5270 if (vaxc$errno & 1) {
5272 /* So force success status to failure */
5273 if (STATUS_NATIVE & 1)
5278 STATUS_UNIX = EINTR; /* In case something cares */
5283 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5285 /* Encode the severity code */
5286 severity = STATUS_NATIVE & STS$M_SEVERITY;
5287 STATUS_UNIX = (severity ? severity : 1) << 8;
5289 /* Perl expects this to be a fatal error */
5290 if (severity != STS$K_SEVERE)
5299 STATUS_UNIX_SET(errno);
5301 exitstatus = STATUS_UNIX >> 8;
5302 if (exitstatus & 255)
5303 STATUS_UNIX_SET(exitstatus);
5305 STATUS_UNIX_SET(255);
5312 S_my_exit_jump(pTHX)
5317 SvREFCNT_dec(PL_e_script);
5321 POPSTACK_TO(PL_mainstack);
5329 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5332 const char * const p = SvPVX_const(PL_e_script);
5333 const char *nl = strchr(p, '\n');
5335 PERL_UNUSED_ARG(idx);
5336 PERL_UNUSED_ARG(maxlen);
5338 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5340 filter_del(read_e_script);
5343 sv_catpvn(buf_sv, p, nl-p);
5344 sv_chop(PL_e_script, nl);
5350 * c-indentation-style: bsd
5352 * indent-tabs-mode: t
5355 * ex: set ts=8 sts=4 sw=4 noet: