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 /* this is ifdef'ed out, we would enable this if we want to transform
1913 "DEVEL" registered patches into the git name */
1914 if (strEQ(PL_localpatches[i],"DEVEL"))
1915 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1916 0, STRINGIFY(PERL_PATCHNUM), 0);
1919 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1920 0, PL_localpatches[i], 0);
1924 Perl_sv_catpvf(aTHX_ opts_prog,
1925 "\" Built under %s\\n",OSNAME);
1928 sv_catpvs(opts_prog,
1929 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1931 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1934 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1935 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1936 "sort grep {/^PERL/} keys %ENV; ");
1938 sv_catpvs(opts_prog,
1939 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1941 sv_catpvs(opts_prog,
1942 "print \" \\%ENV:\\n @env\\n\" if @env;"
1943 "print \" \\@INC:\\n @INC\\n\";");
1947 opts_prog = Perl_newSVpvf(aTHX_
1948 "Config::config_vars(qw%c%s%c)",
1952 av_push(PL_preambleav, opts_prog);
1953 /* don't look for script or read stdin */
1954 scriptname = BIT_BUCKET;
1958 PL_doextract = TRUE;
1966 if (!*++s || isSPACE(*s)) {
1970 /* catch use of gnu style long options */
1971 if (strEQ(s, "version")) {
1975 if (strEQ(s, "help")) {
1982 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1993 #ifndef SECURE_INTERNAL_GETENV
1996 (s = PerlEnv_getenv("PERL5OPT")))
2000 if (*s == '-' && *(s+1) == 'T') {
2001 CHECK_MALLOC_TOO_LATE_FOR('T');
2003 PL_taint_warn = FALSE;
2006 char *popt_copy = NULL;
2019 if (!strchr("CDIMUdmtw", *s))
2020 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2024 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2025 s = popt_copy + (s - d);
2033 if( !PL_tainting ) {
2034 PL_taint_warn = TRUE;
2045 #ifdef USE_SITECUSTOMIZE
2047 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2048 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2053 scriptname = argv[0];
2056 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2058 else if (scriptname == NULL) {
2060 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2066 /* Set $^X early so that it can be used for relocatable paths in @INC */
2067 assert (!PL_tainted);
2069 S_set_caret_X(aTHX);
2074 bool suidscript = FALSE;
2077 const int fdscript =
2079 open_script(scriptname, dosearch, &suidscript, &rsfp);
2081 validate_suid(validarg, scriptname, fdscript, suidscript,
2085 # if defined(SIGCHLD) || defined(SIGCLD)
2088 # define SIGCHLD SIGCLD
2090 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2091 if (sigstate == (Sighandler_t) SIG_IGN) {
2092 if (ckWARN(WARN_SIGNAL))
2093 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2094 "Can't ignore signal CHLD, forcing to default");
2095 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2102 #ifdef MACOS_TRADITIONAL
2103 || gMacPerl_AlwaysExtract
2107 /* This will croak if suidscript is true, as -x cannot be used with
2109 forbid_setid('x', suidscript);
2110 /* Hence you can't get here if suidscript is true */
2112 find_beginning(linestr_sv, rsfp);
2113 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2114 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2118 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2119 CvUNIQUE_on(PL_compcv);
2121 CvPADLIST(PL_compcv) = pad_new(0);
2123 PL_isarev = newHV();
2126 boot_core_UNIVERSAL();
2127 boot_core_xsutils();
2131 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2133 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2139 # ifdef HAS_SOCKS5_INIT
2140 socks5_init(argv[0]);
2146 init_predump_symbols();
2147 /* init_postdump_symbols not currently designed to be called */
2148 /* more than once (ENV isn't cleared first, for example) */
2149 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2151 init_postdump_symbols(argc,argv,env);
2153 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2154 * or explicitly in some platforms.
2155 * locale.c:Perl_init_i18nl10n() if the environment
2156 * look like the user wants to use UTF-8. */
2157 #if defined(__SYMBIAN32__)
2158 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2161 /* Requires init_predump_symbols(). */
2162 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2167 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2168 * and the default open disciplines. */
2169 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2170 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2172 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2173 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2174 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2176 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2177 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2178 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2180 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2181 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2182 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2184 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2185 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2188 sv_setpvs(sv, ":utf8\0:utf8");
2190 sv_setpvs(sv, ":utf8\0");
2193 sv_setpvs(sv, "\0:utf8");
2201 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2202 if (strEQ(s, "unsafe"))
2203 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2204 else if (strEQ(s, "safe"))
2205 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2207 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2214 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2218 PL_xmlfp = PerlIO_stdout();
2220 PL_xmlfp = PerlIO_open(s, "w");
2222 Perl_croak(aTHX_ "Can't open %s", s);
2224 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2230 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2231 PL_madskills = atoi(s);
2232 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2237 lex_start(linestr_sv, rsfp, TRUE);
2238 PL_subname = newSVpvs("main");
2240 if (add_read_e_script)
2241 filter_add(read_e_script, NULL);
2243 /* now parse the script */
2245 SETERRNO(0,SS_NORMAL);
2246 #ifdef MACOS_TRADITIONAL
2247 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2249 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2251 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2252 MacPerl_MPWFileName(PL_origfilename));
2256 if (yyparse() || PL_parser->error_count) {
2258 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2260 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2265 CopLINE_set(PL_curcop, 0);
2266 PL_curstash = PL_defstash;
2268 SvREFCNT_dec(PL_e_script);
2276 SAVECOPFILE(PL_curcop);
2277 SAVECOPLINE(PL_curcop);
2278 gv_check(PL_defstash);
2287 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2288 dump_mstats("after compilation:");
2298 =for apidoc perl_run
2300 Tells a Perl interpreter to run. See L<perlembed>.
2313 PERL_ARGS_ASSERT_PERL_RUN;
2314 #ifndef MULTIPLICITY
2315 PERL_UNUSED_ARG(my_perl);
2318 oldscope = PL_scopestack_ix;
2326 cxstack_ix = -1; /* start context stack again */
2328 case 0: /* normal completion */
2332 case 2: /* my_exit() */
2333 while (PL_scopestack_ix > oldscope)
2336 PL_curstash = PL_defstash;
2337 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2338 PL_endav && !PL_minus_c)
2339 call_list(oldscope, PL_endav);
2341 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2342 dump_mstats("after execution: ");
2348 POPSTACK_TO(PL_mainstack);
2351 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2362 S_run_body(pTHX_ I32 oldscope)
2365 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2366 PL_sawampersand ? "Enabling" : "Omitting"));
2368 if (!PL_restartop) {
2372 exit(0); /* less likely to core dump than my_exit(0) */
2375 DEBUG_x(dump_all());
2378 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2382 #ifdef MACOS_TRADITIONAL
2383 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2384 (gMacPerl_ErrorFormat ? "# " : ""),
2385 MacPerl_MPWFileName(PL_origfilename));
2387 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2391 if (PERLDB_SINGLE && PL_DBsingle)
2392 sv_setiv(PL_DBsingle, 1);
2394 call_list(oldscope, PL_initav);
2395 #ifdef PERL_DEBUG_READONLY_OPS
2396 Perl_pending_Slabs_to_ro(aTHX);
2403 PL_op = PL_restartop;
2407 else if (PL_main_start) {
2408 CvDEPTH(PL_main_cv) = 1;
2409 PL_op = PL_main_start;
2417 =head1 SV Manipulation Functions
2419 =for apidoc p||get_sv
2421 Returns the SV of the specified Perl scalar. If C<create> is set and the
2422 Perl variable does not exist then it will be created. If C<create> is not
2423 set and the variable does not exist then NULL is returned.
2429 Perl_get_sv(pTHX_ const char *name, I32 create)
2433 PERL_ARGS_ASSERT_GET_SV;
2435 gv = gv_fetchpv(name, create, SVt_PV);
2442 =head1 Array Manipulation Functions
2444 =for apidoc p||get_av
2446 Returns the AV of the specified Perl array. If C<create> is set and the
2447 Perl variable does not exist then it will be created. If C<create> is not
2448 set and the variable does not exist then NULL is returned.
2454 Perl_get_av(pTHX_ const char *name, I32 create)
2456 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2458 PERL_ARGS_ASSERT_GET_AV;
2468 =head1 Hash Manipulation Functions
2470 =for apidoc p||get_hv
2472 Returns the HV of the specified Perl hash. If C<create> is set and the
2473 Perl variable does not exist then it will be created. If C<create> is not
2474 set and the variable does not exist then NULL is returned.
2480 Perl_get_hv(pTHX_ const char *name, I32 create)
2482 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2484 PERL_ARGS_ASSERT_GET_HV;
2494 =head1 CV Manipulation Functions
2496 =for apidoc p||get_cvn_flags
2498 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2499 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2500 exist then it will be declared (which has the same effect as saying
2501 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2502 then NULL is returned.
2504 =for apidoc p||get_cv
2506 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2512 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2514 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2515 /* XXX this is probably not what they think they're getting.
2516 * It has the same effect as "sub name;", i.e. just a forward
2519 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2521 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2522 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2523 return newSUB(start_subparse(FALSE, 0),
2524 newSVOP(OP_CONST, 0, sv),
2533 Perl_get_cv(pTHX_ const char *name, I32 flags)
2535 PERL_ARGS_ASSERT_GET_CV;
2537 return get_cvn_flags(name, strlen(name), flags);
2540 /* Be sure to refetch the stack pointer after calling these routines. */
2544 =head1 Callback Functions
2546 =for apidoc p||call_argv
2548 Performs a callback to the specified Perl sub. See L<perlcall>.
2554 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2556 /* See G_* flags in cop.h */
2557 /* null terminated arg list */
2562 PERL_ARGS_ASSERT_CALL_ARGV;
2567 mXPUSHs(newSVpv(*argv,0));
2572 return call_pv(sub_name, flags);
2576 =for apidoc p||call_pv
2578 Performs a callback to the specified Perl sub. See L<perlcall>.
2584 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2585 /* name of the subroutine */
2586 /* See G_* flags in cop.h */
2588 PERL_ARGS_ASSERT_CALL_PV;
2590 return call_sv(MUTABLE_SV(get_cv(sub_name, TRUE)), flags);
2594 =for apidoc p||call_method
2596 Performs a callback to the specified Perl method. The blessed object must
2597 be on the stack. See L<perlcall>.
2603 Perl_call_method(pTHX_ const char *methname, I32 flags)
2604 /* name of the subroutine */
2605 /* See G_* flags in cop.h */
2607 PERL_ARGS_ASSERT_CALL_METHOD;
2609 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2612 /* May be called with any of a CV, a GV, or an SV containing the name. */
2614 =for apidoc p||call_sv
2616 Performs a callback to the Perl sub whose name is in the SV. See
2623 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2624 /* See G_* flags in cop.h */
2627 LOGOP myop; /* fake syntax tree node */
2632 bool oldcatch = CATCH_GET;
2634 OP* const oldop = PL_op;
2637 PERL_ARGS_ASSERT_CALL_SV;
2639 if (flags & G_DISCARD) {
2643 if (!(flags & G_WANT)) {
2644 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2649 Zero(&myop, 1, LOGOP);
2650 myop.op_next = NULL;
2651 if (!(flags & G_NOARGS))
2652 myop.op_flags |= OPf_STACKED;
2653 myop.op_flags |= OP_GIMME_REVERSE(flags);
2657 EXTEND(PL_stack_sp, 1);
2658 *++PL_stack_sp = sv;
2660 oldscope = PL_scopestack_ix;
2662 if (PERLDB_SUB && PL_curstash != PL_debstash
2663 /* Handle first BEGIN of -d. */
2664 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2665 /* Try harder, since this may have been a sighandler, thus
2666 * curstash may be meaningless. */
2667 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2668 && !(flags & G_NODEBUG))
2669 PL_op->op_private |= OPpENTERSUB_DB;
2671 if (flags & G_METHOD) {
2672 Zero(&method_op, 1, UNOP);
2673 method_op.op_next = PL_op;
2674 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2675 method_op.op_type = OP_METHOD;
2676 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2677 myop.op_type = OP_ENTERSUB;
2678 PL_op = (OP*)&method_op;
2681 if (!(flags & G_EVAL)) {
2683 CALL_BODY_SUB((OP*)&myop);
2684 retval = PL_stack_sp - (PL_stack_base + oldmark);
2685 CATCH_SET(oldcatch);
2688 myop.op_other = (OP*)&myop;
2690 create_eval_scope(flags|G_FAKINGEVAL);
2698 CALL_BODY_SUB((OP*)&myop);
2699 retval = PL_stack_sp - (PL_stack_base + oldmark);
2700 if (!(flags & G_KEEPERR)) {
2708 /* my_exit() was called */
2709 PL_curstash = PL_defstash;
2712 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2713 Perl_croak(aTHX_ "Callback called exit");
2718 PL_op = PL_restartop;
2722 PL_stack_sp = PL_stack_base + oldmark;
2723 if ((flags & G_WANT) == G_ARRAY)
2727 *++PL_stack_sp = &PL_sv_undef;
2732 if (PL_scopestack_ix > oldscope)
2733 delete_eval_scope();
2737 if (flags & G_DISCARD) {
2738 PL_stack_sp = PL_stack_base + oldmark;
2747 /* Eval a string. The G_EVAL flag is always assumed. */
2750 =for apidoc p||eval_sv
2752 Tells Perl to C<eval> the string in the SV.
2758 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2760 /* See G_* flags in cop.h */
2764 UNOP myop; /* fake syntax tree node */
2765 VOL I32 oldmark = SP - PL_stack_base;
2768 OP* const oldop = PL_op;
2771 PERL_ARGS_ASSERT_EVAL_SV;
2773 if (flags & G_DISCARD) {
2780 Zero(PL_op, 1, UNOP);
2781 EXTEND(PL_stack_sp, 1);
2782 *++PL_stack_sp = sv;
2784 if (!(flags & G_NOARGS))
2785 myop.op_flags = OPf_STACKED;
2786 myop.op_next = NULL;
2787 myop.op_type = OP_ENTEREVAL;
2788 myop.op_flags |= OP_GIMME_REVERSE(flags);
2789 if (flags & G_KEEPERR)
2790 myop.op_flags |= OPf_SPECIAL;
2792 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2793 * before a PUSHEVAL, which corrupts the stack after a croak */
2794 TAINT_PROPER("eval_sv()");
2800 CALL_BODY_EVAL((OP*)&myop);
2801 retval = PL_stack_sp - (PL_stack_base + oldmark);
2802 if (!(flags & G_KEEPERR)) {
2810 /* my_exit() was called */
2811 PL_curstash = PL_defstash;
2814 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2815 Perl_croak(aTHX_ "Callback called exit");
2820 PL_op = PL_restartop;
2824 PL_stack_sp = PL_stack_base + oldmark;
2825 if ((flags & G_WANT) == G_ARRAY)
2829 *++PL_stack_sp = &PL_sv_undef;
2835 if (flags & G_DISCARD) {
2836 PL_stack_sp = PL_stack_base + oldmark;
2846 =for apidoc p||eval_pv
2848 Tells Perl to C<eval> the given string and return an SV* result.
2854 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2858 SV* sv = newSVpv(p, 0);
2860 PERL_ARGS_ASSERT_EVAL_PV;
2862 eval_sv(sv, G_SCALAR);
2869 if (croak_on_error && SvTRUE(ERRSV)) {
2870 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2876 /* Require a module. */
2879 =head1 Embedding Functions
2881 =for apidoc p||require_pv
2883 Tells Perl to C<require> the file named by the string argument. It is
2884 analogous to the Perl code C<eval "require '$file'">. It's even
2885 implemented that way; consider using load_module instead.
2890 Perl_require_pv(pTHX_ const char *pv)
2896 PERL_ARGS_ASSERT_REQUIRE_PV;
2898 PUSHSTACKi(PERLSI_REQUIRE);
2900 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2901 eval_sv(sv_2mortal(sv), G_DISCARD);
2907 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2909 /* This message really ought to be max 23 lines.
2910 * Removed -h because the user already knows that option. Others? */
2912 static const char * const usage_msg[] = {
2913 "-0[octal] specify record separator (\\0, if no argument)",
2914 "-a autosplit mode with -n or -p (splits $_ into @F)",
2915 "-C[number/list] enables the listed Unicode features",
2916 "-c check syntax only (runs BEGIN and CHECK blocks)",
2917 "-d[:debugger] run program under debugger",
2918 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2919 "-e program one line of program (several -e's allowed, omit programfile)",
2920 "-E program like -e, but enables all optional features",
2921 "-f don't do $sitelib/sitecustomize.pl at startup",
2922 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2923 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2924 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2925 "-l[octal] enable line ending processing, specifies line terminator",
2926 "-[mM][-]module execute \"use/no module...\" before executing program",
2927 "-n assume \"while (<>) { ... }\" loop around program",
2928 "-p assume loop like -n but print line also, like sed",
2929 "-s enable rudimentary parsing for switches after programfile",
2930 "-S look for programfile using PATH environment variable",
2931 "-t enable tainting warnings",
2932 "-T enable tainting checks",
2933 "-u dump core after parsing program",
2934 "-U allow unsafe operations",
2935 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2936 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2937 "-w enable many useful warnings (RECOMMENDED)",
2938 "-W enable all warnings",
2939 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2940 "-X disable all warnings",
2944 const char * const *p = usage_msg;
2946 PERL_ARGS_ASSERT_USAGE;
2948 PerlIO_printf(PerlIO_stdout(),
2949 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2952 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2955 /* convert a string of -D options (or digits) into an int.
2956 * sets *s to point to the char after the options */
2960 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2962 static const char * const usage_msgd[] = {
2963 " Debugging flag values: (see also -d)",
2964 " p Tokenizing and parsing (with v, displays parse stack)",
2965 " s Stack snapshots (with v, displays all stacks)",
2966 " l Context (loop) stack processing",
2967 " t Trace execution",
2968 " o Method and overloading resolution",
2969 " c String/numeric conversions",
2970 " P Print profiling info, source file input state",
2971 " m Memory and SV allocation",
2972 " f Format processing",
2973 " r Regular expression parsing and execution",
2974 " x Syntax tree dump",
2975 " u Tainting checks",
2976 " H Hash dump -- usurps values()",
2977 " X Scratchpad allocation",
2980 " R Include reference counts of dumped variables (eg when using -Ds)",
2981 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2982 " v Verbose: use in conjunction with other flags",
2984 " A Consistency checks on internal structures",
2985 " q quiet - currently only suppresses the 'EXECUTING' message",
2990 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2993 /* if adding extra options, remember to update DEBUG_MASK */
2994 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2996 for (; isALNUM(**s); (*s)++) {
2997 const char * const d = strchr(debopts,**s);
2999 i |= 1 << (d - debopts);
3000 else if (ckWARN_d(WARN_DEBUGGING))
3001 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3002 "invalid option -D%c, use -D'' to see choices\n", **s);
3005 else if (isDIGIT(**s)) {
3007 for (; isALNUM(**s); (*s)++) ;
3009 else if (givehelp) {
3010 const char *const *p = usage_msgd;
3011 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3014 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3015 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3016 "-Dp not implemented on this platform\n");
3022 /* This routine handles any switches that can be given during run */
3025 Perl_moreswitches(pTHX_ const char *s)
3029 const char option = *s; /* used to remember option in -m/-M code */
3031 PERL_ARGS_ASSERT_MORESWITCHES;
3039 SvREFCNT_dec(PL_rs);
3040 if (s[1] == 'x' && s[2]) {
3041 const char *e = s+=2;
3047 flags = PERL_SCAN_SILENT_ILLDIGIT;
3048 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3049 if (s + numlen < e) {
3050 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3054 PL_rs = newSVpvs("");
3055 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3056 tmps = (U8*)SvPVX(PL_rs);
3057 uvchr_to_utf8(tmps, rschar);
3058 SvCUR_set(PL_rs, UNISKIP(rschar));
3063 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3064 if (rschar & ~((U8)~0))
3065 PL_rs = &PL_sv_undef;
3066 else if (!rschar && numlen >= 2)
3067 PL_rs = newSVpvs("");
3069 char ch = (char)rschar;
3070 PL_rs = newSVpvn(&ch, 1);
3073 sv_setsv(get_sv("/", TRUE), PL_rs);
3078 PL_unicode = parse_unicode_opts( (const char **)&s );
3079 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3085 while (*s && !isSPACE(*s)) ++s;
3086 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3097 forbid_setid('d', FALSE);
3100 /* -dt indicates to the debugger that threads will be used */
3101 if (*s == 't' && !isALNUM(s[1])) {
3103 my_setenv("PERL5DB_THREADED", "1");
3106 /* The following permits -d:Mod to accepts arguments following an =
3107 in the fashion that -MSome::Mod does. */
3108 if (*s == ':' || *s == '=') {
3109 const char *start = ++s;
3110 const char *const end = s + strlen(s);
3111 SV * const sv = newSVpvs("use Devel::");
3113 /* We now allow -d:Module=Foo,Bar */
3114 while(isALNUM(*s) || *s==':') ++s;
3116 sv_catpvn(sv, start, end - start);
3118 sv_catpvn(sv, start, s-start);
3119 /* Don't use NUL as q// delimiter here, this string goes in the
3121 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3124 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3128 PL_perldb = PERLDB_ALL;
3135 forbid_setid('D', FALSE);
3137 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3138 #else /* !DEBUGGING */
3139 if (ckWARN_d(WARN_DEBUGGING))
3140 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3141 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3142 for (s++; isALNUM(*s); s++) ;
3147 usage(PL_origargv[0]);
3150 Safefree(PL_inplace);
3151 #if defined(__CYGWIN__) /* do backup extension automagically */
3152 if (*(s+1) == '\0') {
3153 PL_inplace = savepvs(".bak");
3156 #endif /* __CYGWIN__ */
3158 const char * const start = ++s;
3159 while (*s && !isSPACE(*s))
3162 PL_inplace = savepvn(start, s - start);
3166 if (*s == '-') /* Additional switches on #! line. */
3170 case 'I': /* -I handled both here and in parse_body() */
3171 forbid_setid('I', FALSE);
3173 while (*s && isSPACE(*s))
3178 /* ignore trailing spaces (possibly followed by other switches) */
3180 for (e = p; *e && !isSPACE(*e); e++) ;
3184 } while (*p && *p != '-');
3185 e = savepvn(s, e-s);
3186 incpush(e, TRUE, TRUE, FALSE, FALSE, TRUE);
3193 Perl_croak(aTHX_ "No directory specified for -I");
3199 SvREFCNT_dec(PL_ors_sv);
3205 PL_ors_sv = newSVpvs("\n");
3206 numlen = 3 + (*s == '0');
3207 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3211 if (RsPARA(PL_rs)) {
3212 PL_ors_sv = newSVpvs("\n\n");
3215 PL_ors_sv = newSVsv(PL_rs);
3220 forbid_setid('M', FALSE); /* XXX ? */
3223 forbid_setid('m', FALSE); /* XXX ? */
3228 const char *use = "use ";
3230 /* -M-foo == 'no foo' */
3231 /* Leading space on " no " is deliberate, to make both
3232 possibilities the same length. */
3233 if (*s == '-') { use = " no "; ++s; }
3234 sv = newSVpvn(use,4);
3236 /* We allow -M'Module qw(Foo Bar)' */
3237 while(isALNUM(*s) || *s==':') {
3246 Perl_croak(aTHX_ "Module name required with -%c option",
3249 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3250 "contains single ':'",
3251 (int)(s - start), start, option);
3252 end = s + strlen(s);
3254 sv_catpvn(sv, start, end - start);
3255 if (option == 'm') {
3257 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3258 sv_catpvs( sv, " ()");
3261 sv_catpvn(sv, start, s-start);
3262 /* Use NUL as q''-delimiter. */
3263 sv_catpvs(sv, " split(/,/,q\0");
3265 sv_catpvn(sv, s, end - s);
3266 sv_catpvs(sv, "\0)");
3269 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3272 Perl_croak(aTHX_ "Missing argument to -%c", option);
3283 forbid_setid('s', FALSE);
3284 PL_doswitches = TRUE;
3298 #ifdef MACOS_TRADITIONAL
3299 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3301 PL_do_undump = TRUE;
3309 if (!sv_derived_from(PL_patchlevel, "version"))
3310 upg_version(PL_patchlevel, TRUE);
3312 PerlIO_printf(PerlIO_stdout(),
3313 "\nThis is perl, %"SVf
3315 SVfARG(vstringify(PL_patchlevel)),
3318 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3319 PerlIO_printf(PerlIO_stdout(),
3320 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3321 SVfARG(vstringify(PL_patchlevel))));
3322 PerlIO_printf(PerlIO_stdout(),
3323 Perl_form(aTHX_ " built under %s at %s %s\n",
3324 OSNAME, __DATE__, __TIME__));
3325 PerlIO_printf(PerlIO_stdout(),
3326 Perl_form(aTHX_ " OS Specific Release: %s\n",
3329 #if defined PERL_PATCHNUM
3330 PerlIO_printf(PerlIO_stdout(),"\nCompiled from: %s",STRINGIFY(PERL_PATCHNUM));
3332 #if defined(LOCAL_PATCH_COUNT)
3333 if (LOCAL_PATCH_COUNT > 0)
3334 PerlIO_printf(PerlIO_stdout(),
3335 "\n(with %d registered patch%s, "
3336 "see perl -V for more detail)",
3338 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3341 PerlIO_printf(PerlIO_stdout(),
3342 "\n\nCopyright 1987-2008, Larry Wall\n");
3343 #ifdef MACOS_TRADITIONAL
3344 PerlIO_printf(PerlIO_stdout(),
3345 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3346 "maintained by Chris Nandor\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3355 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3360 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3363 PerlIO_printf(PerlIO_stdout(),
3364 "atariST series port, ++jrb bammi@cadence.com\n");
3367 PerlIO_printf(PerlIO_stdout(),
3368 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3371 PerlIO_printf(PerlIO_stdout(),
3372 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3375 PerlIO_printf(PerlIO_stdout(),
3376 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3379 PerlIO_printf(PerlIO_stdout(),
3380 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3383 PerlIO_printf(PerlIO_stdout(),
3384 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3387 PerlIO_printf(PerlIO_stdout(),
3388 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3391 PerlIO_printf(PerlIO_stdout(),
3392 "MiNT port by Guido Flohr, 1997-1999\n");
3395 PerlIO_printf(PerlIO_stdout(),
3396 "EPOC port by Olaf Flebbe, 1999-2002\n");
3399 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3400 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3403 #ifdef __SYMBIAN32__
3404 PerlIO_printf(PerlIO_stdout(),
3405 "Symbian port by Nokia, 2004-2005\n");
3407 #ifdef BINARY_BUILD_NOTICE
3408 BINARY_BUILD_NOTICE;
3410 PerlIO_printf(PerlIO_stdout(),
3412 Perl may be copied only under the terms of either the Artistic License or the\n\
3413 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3414 Complete documentation for Perl, including FAQ lists, should be found on\n\
3415 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3416 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3419 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3420 PL_dowarn |= G_WARN_ON;
3425 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3426 if (!specialWARN(PL_compiling.cop_warnings))
3427 PerlMemShared_free(PL_compiling.cop_warnings);
3428 PL_compiling.cop_warnings = pWARN_ALL ;
3432 PL_dowarn = G_WARN_ALL_OFF;
3433 if (!specialWARN(PL_compiling.cop_warnings))
3434 PerlMemShared_free(PL_compiling.cop_warnings);
3435 PL_compiling.cop_warnings = pWARN_NONE ;
3442 if (s[0] == '-') /* Additional switches on #! line. */
3447 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3453 #ifdef ALTERNATE_SHEBANG
3454 case 'S': /* OS/2 needs -S on "extproc" line. */
3458 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3463 /* compliments of Tom Christiansen */
3465 /* unexec() can be found in the Gnu emacs distribution */
3466 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3469 Perl_my_unexec(pTHX)
3471 PERL_UNUSED_CONTEXT;
3473 SV * prog = newSVpv(BIN_EXP, 0);
3474 SV * file = newSVpv(PL_origfilename, 0);
3478 sv_catpvs(prog, "/perl");
3479 sv_catpvs(file, ".perldump");
3481 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3482 /* unexec prints msg to stderr in case of failure */
3483 PerlProc_exit(status);
3486 # include <lib$routines.h>
3487 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3488 # elif defined(WIN32) || defined(__CYGWIN__)
3489 Perl_croak(aTHX_ "dump is not supported");
3491 ABORT(); /* for use with undump */
3496 /* initialize curinterp */
3502 # define PERLVAR(var,type)
3503 # define PERLVARA(var,n,type)
3504 # if defined(PERL_IMPLICIT_CONTEXT)
3505 # define PERLVARI(var,type,init) aTHX->var = init;
3506 # define PERLVARIC(var,type,init) aTHX->var = init;
3508 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3509 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3511 # include "intrpvar.h"
3517 # define PERLVAR(var,type)
3518 # define PERLVARA(var,n,type)
3519 # define PERLVARI(var,type,init) PL_##var = init;
3520 # define PERLVARIC(var,type,init) PL_##var = init;
3521 # include "intrpvar.h"
3528 /* As these are inside a structure, PERLVARI isn't capable of initialising
3530 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3531 PL_reg_poscache = PL_reg_starttry = NULL;
3535 S_init_main_stash(pTHX)
3540 PL_curstash = PL_defstash = newHV();
3541 /* We know that the string "main" will be in the global shared string
3542 table, so it's a small saving to use it rather than allocate another
3544 PL_curstname = newSVpvs_share("main");
3545 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3546 /* If we hadn't caused another reference to "main" to be in the shared
3547 string table above, then it would be worth reordering these two,
3548 because otherwise all we do is delete "main" from it as a consequence
3549 of the SvREFCNT_dec, only to add it again with hv_name_set */
3550 SvREFCNT_dec(GvHV(gv));
3551 hv_name_set(PL_defstash, "main", 4, 0);
3552 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3554 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3556 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3557 GvMULTI_on(PL_incgv);
3558 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3559 GvMULTI_on(PL_hintgv);
3560 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3561 SvREFCNT_inc_simple_void(PL_defgv);
3562 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3563 SvREFCNT_inc_simple_void(PL_errgv);
3564 GvMULTI_on(PL_errgv);
3565 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3566 GvMULTI_on(PL_replgv);
3567 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3568 #ifdef PERL_DONT_CREATE_GVSV
3571 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3573 PL_curstash = PL_defstash;
3574 CopSTASH_set(&PL_compiling, PL_defstash);
3575 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3576 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3578 /* We must init $/ before switches are processed. */
3579 sv_setpvs(get_sv("/", TRUE), "\n");
3583 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3584 bool *suidscript, PerlIO **rsfpp)
3589 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3592 PL_origfilename = savepvs("-e");
3595 /* if find_script() returns, it returns a malloc()-ed value */
3596 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3598 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3599 const char *s = scriptname + 8;
3605 * Tell apart "normal" usage of fdscript, e.g.
3606 * with bash on FreeBSD:
3607 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3608 * from usage in suidperl.
3609 * Does any "normal" usage leave garbage after the number???
3610 * Is it a mistake to use a similar /dev/fd/ construct for
3615 * Be supersafe and do some sanity-checks.
3616 * Still, can we be sure we got the right thing?
3619 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3622 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3624 scriptname = savepv(s + 1);
3625 Safefree(PL_origfilename);
3626 PL_origfilename = (char *)scriptname;
3631 CopFILE_free(PL_curcop);
3632 CopFILE_set(PL_curcop, PL_origfilename);
3633 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3634 scriptname = (char *)"";
3635 if (fdscript >= 0) {
3636 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3637 # if defined(HAS_FCNTL) && defined(F_SETFD)
3639 /* ensure close-on-exec */
3640 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3645 Perl_croak(aTHX_ "sperl needs fd script\n"
3646 "You should not call sperl directly; do you need to "
3647 "change a #! line\nfrom sperl to perl?\n");
3650 * Do not open (or do other fancy stuff) while setuid.
3651 * Perl does the open, and hands script to suidperl on a fd;
3652 * suidperl only does some checks, sets up UIDs and re-execs
3653 * perl with that fd as it has always done.
3657 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3660 else if (!*scriptname) {
3661 forbid_setid(0, *suidscript);
3662 *rsfpp = PerlIO_stdin();
3665 #ifdef FAKE_BIT_BUCKET
3666 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3667 * is called) and still have the "-e" work. (Believe it or not,
3668 * a /dev/null is required for the "-e" to work because source
3669 * filter magic is used to implement it. ) This is *not* a general
3670 * replacement for a /dev/null. What we do here is create a temp
3671 * file (an empty file), open up that as the script, and then
3672 * immediately close and unlink it. Close enough for jazz. */
3673 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3674 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3675 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3676 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3677 FAKE_BIT_BUCKET_TEMPLATE
3679 const char * const err = "Failed to create a fake bit bucket";
3680 if (strEQ(scriptname, BIT_BUCKET)) {
3681 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3682 int tmpfd = mkstemp(tmpname);
3684 scriptname = tmpname;
3687 Perl_croak(aTHX_ err);
3690 scriptname = mktemp(tmpname);
3692 Perl_croak(aTHX_ err);
3697 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3698 #ifdef FAKE_BIT_BUCKET
3699 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3700 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3701 && strlen(scriptname) == sizeof(tmpname) - 1) {
3704 scriptname = BIT_BUCKET;
3706 # if defined(HAS_FCNTL) && defined(F_SETFD)
3708 /* ensure close-on-exec */
3709 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3712 #endif /* IAMSUID */
3714 /* PSz 16 Sep 03 Keep neat error message */
3716 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3718 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3719 CopFILE(PL_curcop), Strerror(errno));
3725 * I_SYSSTATVFS HAS_FSTATVFS
3727 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3728 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3729 * here so that metaconfig picks them up. */
3733 S_fd_on_nosuid_fs(pTHX_ int fd)
3736 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3737 * but is needed also on machines without setreuid.
3738 * Seems safe enough to run as root.
3740 int check_okay = 0; /* able to do all the required sys/libcalls */
3741 int on_nosuid = 0; /* the fd is on a nosuid fs */
3743 * Need to check noexec also: nosuid might not be set, the average
3744 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3746 int on_noexec = 0; /* the fd is on a noexec fs */
3749 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3750 * fstatvfs() is UNIX98.
3751 * fstatfs() is 4.3 BSD.
3752 * ustat()+getmnt() is pre-4.3 BSD.
3753 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3754 * an irrelevant filesystem while trying to reach the right one.
3757 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3759 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3760 defined(HAS_FSTATVFS)
3761 # define FD_ON_NOSUID_CHECK_OKAY
3762 struct statvfs stfs;
3764 check_okay = fstatvfs(fd, &stfs) == 0;
3765 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3767 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3768 on platforms where it is present. */
3769 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3771 # endif /* fstatvfs */
3773 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3774 defined(PERL_MOUNT_NOSUID) && \
3775 defined(PERL_MOUNT_NOEXEC) && \
3776 defined(HAS_FSTATFS) && \
3777 defined(HAS_STRUCT_STATFS) && \
3778 defined(HAS_STRUCT_STATFS_F_FLAGS)
3779 # define FD_ON_NOSUID_CHECK_OKAY
3782 check_okay = fstatfs(fd, &stfs) == 0;
3783 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3784 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3785 # endif /* fstatfs */
3787 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3788 defined(PERL_MOUNT_NOSUID) && \
3789 defined(PERL_MOUNT_NOEXEC) && \
3790 defined(HAS_FSTAT) && \
3791 defined(HAS_USTAT) && \
3792 defined(HAS_GETMNT) && \
3793 defined(HAS_STRUCT_FS_DATA) && \
3795 # define FD_ON_NOSUID_CHECK_OKAY
3798 if (fstat(fd, &fdst) == 0) {
3800 if (ustat(fdst.st_dev, &us) == 0) {
3802 /* NOSTAT_ONE here because we're not examining fields which
3803 * vary between that case and STAT_ONE. */
3804 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3805 size_t cmplen = sizeof(us.f_fname);
3806 if (sizeof(fsd.fd_req.path) < cmplen)
3807 cmplen = sizeof(fsd.fd_req.path);
3808 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3809 fdst.st_dev == fsd.fd_req.dev) {
3811 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3812 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3817 # endif /* fstat+ustat+getmnt */
3819 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3820 defined(HAS_GETMNTENT) && \
3821 defined(HAS_HASMNTOPT) && \
3822 defined(MNTOPT_NOSUID) && \
3823 defined(MNTOPT_NOEXEC)
3824 # define FD_ON_NOSUID_CHECK_OKAY
3825 FILE *mtab = fopen("/etc/mtab", "r");
3826 struct mntent *entry;
3829 if (mtab && (fstat(fd, &stb) == 0)) {
3830 while (entry = getmntent(mtab)) {
3831 if (stat(entry->mnt_dir, &fsb) == 0
3832 && fsb.st_dev == stb.st_dev)
3834 /* found the filesystem */
3836 if (hasmntopt(entry, MNTOPT_NOSUID))
3838 if (hasmntopt(entry, MNTOPT_NOEXEC))
3841 } /* A single fs may well fail its stat(). */
3846 # endif /* getmntent+hasmntopt */
3849 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3851 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3853 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3854 return ((!check_okay) || on_nosuid || on_noexec);
3856 #endif /* IAMSUID */
3860 S_validate_suid(pTHX_ const char *validarg,
3862 const char *scriptname,
3868 SV *linestr_sv, PerlIO *rsfp)
3873 PERL_ARGS_ASSERT_VALIDATE_SUID;
3875 /* do we need to emulate setuid on scripts? */
3877 /* This code is for those BSD systems that have setuid #! scripts disabled
3878 * in the kernel because of a security problem. Merely defining DOSUID
3879 * in perl will not fix that problem, but if you have disabled setuid
3880 * scripts in the kernel, this will attempt to emulate setuid and setgid
3881 * on scripts that have those now-otherwise-useless bits set. The setuid
3882 * root version must be called suidperl or sperlN.NNN. If regular perl
3883 * discovers that it has opened a setuid script, it calls suidperl with
3884 * the same argv that it had. If suidperl finds that the script it has
3885 * just opened is NOT setuid root, it sets the effective uid back to the
3886 * uid. We don't just make perl setuid root because that loses the
3887 * effective uid we had before invoking perl, if it was different from the
3890 * Description/comments above do not match current workings:
3891 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3892 * suidperl called with script open and name changed to /dev/fd/N/X;
3893 * suidperl croaks if script is not setuid;
3894 * making perl setuid would be a huge security risk (and yes, that
3895 * would lose any euid we might have had).
3897 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3898 * be defined in suidperl only. suidperl must be setuid root. The
3899 * Configure script will set this up for you if you want it.
3902 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3903 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3904 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3906 const char *linestr;
3910 if (fdscript < 0 || !suidscript)
3911 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3913 * Since the script is opened by perl, not suidperl, some of these
3914 * checks are superfluous. Leaving them in probably does not lower
3918 * Do checks even for systems with no HAS_SETREUID.
3919 * We used to swap, then re-swap UIDs with
3920 # ifdef HAS_SETREUID
3921 if (setreuid(PL_euid,PL_uid) < 0
3922 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3923 Perl_croak(aTHX_ "Can't swap uid and euid");
3925 # ifdef HAS_SETREUID
3926 if (setreuid(PL_uid,PL_euid) < 0
3927 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3928 Perl_croak(aTHX_ "Can't reswap uid and euid");
3932 /* On this access check to make sure the directories are readable,
3933 * there is actually a small window that the user could use to make
3934 * filename point to an accessible directory. So there is a faint
3935 * chance that someone could execute a setuid script down in a
3936 * non-accessible directory. I don't know what to do about that.
3937 * But I don't think it's too important. The manual lies when
3938 * it says access() is useful in setuid programs.
3940 * So, access() is pretty useless... but not harmful... do anyway.
3942 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3943 Perl_croak(aTHX_ "Can't access() script\n");
3946 /* If we can swap euid and uid, then we can determine access rights
3947 * with a simple stat of the file, and then compare device and
3948 * inode to make sure we did stat() on the same file we opened.
3949 * Then we just have to make sure he or she can execute it.
3952 * As the script is opened by perl, not suidperl, we do not need to
3953 * care much about access rights.
3955 * The 'script changed' check is needed, or we can get lied to
3956 * about $0 with e.g.
3957 * suidperl /dev/fd/4//bin/x 4<setuidscript
3958 * Without HAS_SETREUID, is it safe to stat() as root?
3960 * Are there any operating systems that pass /dev/fd/xxx for setuid
3961 * scripts, as suggested/described in perlsec(1)? Surely they do not
3962 * pass the script name as we do, so the "script changed" test would
3963 * fail for them... but we never get here with
3964 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3966 * This is one place where we must "lie" about return status: not
3967 * say if the stat() failed. We are doing this as root, and could
3968 * be tricked into reporting existence or not of files that the
3969 * "plain" user cannot even see.
3973 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3974 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3975 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3976 Perl_croak(aTHX_ "Setuid script changed\n");
3980 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3981 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3984 * We used to do this check as the "plain" user (after swapping
3985 * UIDs). But the check for nosuid and noexec filesystem is needed,
3986 * and should be done even without HAS_SETREUID. (Maybe those
3987 * operating systems do not have such mount options anyway...)
3988 * Seems safe enough to do as root.
3990 # if !defined(NO_NOSUID_CHECK)
3991 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3992 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3995 # endif /* IAMSUID */
3997 if (!S_ISREG(PL_statbuf.st_mode)) {
3998 Perl_croak(aTHX_ "Setuid script not plain file\n");
4000 if (PL_statbuf.st_mode & S_IWOTH)
4001 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4002 PL_doswitches = FALSE; /* -s is insecure in suid */
4003 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4004 CopLINE_inc(PL_curcop);
4005 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4006 Perl_croak(aTHX_ "No #! line");
4007 linestr = SvPV_nolen_const(linestr_sv);
4008 /* required even on Sys V */
4009 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4010 Perl_croak(aTHX_ "No #! line");
4014 /* Sanity check on line length */
4015 s_end = s + strlen(s);
4016 if (s_end == s || (s_end - s) > 4000)
4017 Perl_croak(aTHX_ "Very long #! line");
4018 /* Allow more than a single space after #! */
4019 while (isSPACE(*s)) s++;
4020 /* Sanity check on buffer end */
4021 while ((*s) && !isSPACE(*s)) s++;
4022 for (s2 = s; (s2 > linestr &&
4023 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4024 || s2[-1] == '-')); s2--) ;
4025 /* Sanity check on buffer start */
4026 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4027 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4028 Perl_croak(aTHX_ "Not a perl script");
4029 while (*s == ' ' || *s == '\t') s++;
4031 * #! arg must be what we saw above. They can invoke it by
4032 * mentioning suidperl explicitly, but they may not add any strange
4033 * arguments beyond what #! says if they do invoke suidperl that way.
4036 * The way validarg was set up, we rely on the kernel to start
4037 * scripts with argv[1] set to contain all #! line switches (the
4041 * Check that we got all the arguments listed in the #! line (not
4042 * just that there are no extraneous arguments). Might not matter
4043 * much, as switches from #! line seem to be acted upon (also), and
4044 * so may be checked and trapped in perl. But, security checks must
4045 * be done in suidperl and not deferred to perl. Note that suidperl
4046 * does not get around to parsing (and checking) the switches on
4047 * the #! line (but execs perl sooner).
4048 * Allow (require) a trailing newline (which may be of two
4049 * characters on some architectures?) (but no other trailing
4052 len = strlen(validarg);
4053 if (strEQ(validarg," PHOOEY ") ||
4054 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4055 !((s_end - s) == len+1
4056 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4057 Perl_croak(aTHX_ "Args must match #! line");
4061 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4062 PL_euid == PL_statbuf.st_uid)
4064 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4065 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4066 # endif /* IAMSUID */
4069 PL_euid) { /* oops, we're not the setuid root perl */
4071 * When root runs a setuid script, we do not go through the same
4072 * steps of execing sperl and then perl with fd scripts, but
4073 * simply set up UIDs within the same perl invocation; so do
4074 * not have the same checks (on options, whatever) that we have
4075 * for plain users. No problem really: would have to be a script
4076 * that does not actually work for plain users; and if root is
4077 * foolish and can be persuaded to run such an unsafe script, he
4078 * might run also non-setuid ones, and deserves what he gets.
4080 * Or, we might drop the PL_euid check above (and rely just on
4081 * fdscript to avoid loops), and do the execs
4087 * Pass fd script to suidperl.
4088 * Exec suidperl, substituting fd script for scriptname.
4089 * Pass script name as "subdir" of fd, which perl will grok;
4090 * in fact will use that to distinguish this from "normal"
4091 * usage, see comments above.
4093 PerlIO_rewind(rsfp);
4094 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4095 /* PSz 27 Feb 04 Sanity checks on scriptname */
4096 if ((!scriptname) || (!*scriptname) ) {
4097 Perl_croak(aTHX_ "No setuid script name\n");
4099 if (*scriptname == '-') {
4100 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4101 /* Or we might confuse it with an option when replacing
4102 * name in argument list, below (though we do pointer, not
4103 * string, comparisons).
4106 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4107 if (!PL_origargv[which]) {
4108 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4110 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4111 PerlIO_fileno(rsfp), PL_origargv[which]));
4112 # if defined(HAS_FCNTL) && defined(F_SETFD)
4113 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4116 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4117 (int)PERL_REVISION, (int)PERL_VERSION,
4118 (int)PERL_SUBVERSION), PL_origargv);
4120 # endif /* IAMSUID */
4121 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4124 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4126 * This seems back to front: we try HAS_SETEGID first; if not available
4127 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4128 * in the sense that we only want to set EGID; but are there any machines
4129 * with either of the latter, but not the former? Same with UID, later.
4132 (void)setegid(PL_statbuf.st_gid);
4134 # ifdef HAS_SETREGID
4135 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4137 # ifdef HAS_SETRESGID
4138 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4140 PerlProc_setgid(PL_statbuf.st_gid);
4144 if (PerlProc_getegid() != PL_statbuf.st_gid)
4145 Perl_croak(aTHX_ "Can't do setegid!\n");
4147 if (PL_statbuf.st_mode & S_ISUID) {
4148 if (PL_statbuf.st_uid != PL_euid)
4150 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4152 # ifdef HAS_SETREUID
4153 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4155 # ifdef HAS_SETRESUID
4156 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4158 PerlProc_setuid(PL_statbuf.st_uid);
4162 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4163 Perl_croak(aTHX_ "Can't do seteuid!\n");
4165 else if (PL_uid) { /* oops, mustn't run as root */
4167 (void)seteuid((Uid_t)PL_uid);
4169 # ifdef HAS_SETREUID
4170 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4172 # ifdef HAS_SETRESUID
4173 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4175 PerlProc_setuid((Uid_t)PL_uid);
4179 if (PerlProc_geteuid() != PL_uid)
4180 Perl_croak(aTHX_ "Can't do seteuid!\n");
4183 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4184 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4187 else if (fdscript < 0 || !suidscript)
4188 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4189 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4191 /* PSz 16 Sep 03 Keep neat error message */
4192 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4195 /* We absolutely must clear out any saved ids here, so we */
4196 /* exec the real perl, substituting fd script for scriptname. */
4197 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4199 * It might be thought that using setresgid and/or setresuid (changed to
4200 * set the saved IDs) above might obviate the need to exec, and we could
4201 * go on to "do the perl thing".
4203 * Is there such a thing as "saved GID", and is that set for setuid (but
4204 * not setgid) execution like suidperl? Without exec, it would not be
4205 * cleared for setuid (but not setgid) scripts (or might need a dummy
4208 * We need suidperl to do the exact same argument checking that perl
4209 * does. Thus it cannot be very small; while it could be significantly
4210 * smaller, it is safer (simpler?) to make it essentially the same
4211 * binary as perl (but they are not identical). - Maybe could defer that
4212 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4213 * but prefer to do thorough checks in suidperl itself. Such deferral
4214 * would make suidperl security rely on perl, a design no-no.
4216 * Setuid things should be short and simple, thus easy to understand and
4217 * verify. They should do their "own thing", without influence by
4218 * attackers. It may help if their internal execution flow is fixed,
4219 * regardless of platform: it may be best to exec anyway.
4221 * Suidperl should at least be conceptually simple: a wrapper only,
4222 * never to do any real perl. Maybe we should put
4224 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4226 * into the perly bits.
4228 PerlIO_rewind(rsfp);
4229 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4231 * Keep original arguments: suidperl already has fd script.
4233 # if defined(HAS_FCNTL) && defined(F_SETFD)
4234 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4237 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4238 (int)PERL_REVISION, (int)PERL_VERSION,
4239 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4241 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4242 # endif /* IAMSUID */
4247 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4248 /* Don't even need this function. */
4251 S_validate_suid(pTHX_ PerlIO *rsfp)
4253 PERL_ARGS_ASSERT_VALIDATE_SUID;
4255 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4256 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4259 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4260 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4262 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4265 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4266 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4267 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4268 /* not set-id, must be wrapped */
4271 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4275 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4279 register const char *s2;
4280 #ifdef MACOS_TRADITIONAL
4284 PERL_ARGS_ASSERT_FIND_BEGINNING;
4286 /* skip forward in input to the real script? */
4288 #ifdef MACOS_TRADITIONAL
4289 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4291 while (PL_doextract || gMacPerl_AlwaysExtract) {
4292 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4293 if (!gMacPerl_AlwaysExtract)
4294 Perl_croak(aTHX_ "No Perl script found in input\n");
4296 if (PL_doextract) /* require explicit override ? */
4297 if (!OverrideExtract(PL_origfilename))
4298 Perl_croak(aTHX_ "User aborted script\n");
4300 PL_doextract = FALSE;
4302 /* Pater peccavi, file does not have #! */
4303 PerlIO_rewind(rsfp);
4308 while (PL_doextract) {
4309 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4310 Perl_croak(aTHX_ "No Perl script found in input\n");
4313 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4314 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4315 PL_doextract = FALSE;
4316 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4318 while (*s == ' ' || *s == '\t') s++;
4320 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4321 || s2[-1] == '_') s2--;
4322 if (strnEQ(s2-4,"perl",4))
4323 while ((s = moreswitches(s)))
4326 #ifdef MACOS_TRADITIONAL
4327 /* We are always searching for the #!perl line in MacPerl,
4328 * so if we find it, still keep the line count correct
4329 * by counting lines we already skipped over
4331 for (; maclines > 0 ; maclines--)
4332 PerlIO_ungetc(rsfp, '\n');
4336 /* gMacPerl_AlwaysExtract is false in MPW tool */
4337 } else if (gMacPerl_AlwaysExtract) {
4349 PL_uid = PerlProc_getuid();
4350 PL_euid = PerlProc_geteuid();
4351 PL_gid = PerlProc_getgid();
4352 PL_egid = PerlProc_getegid();
4354 PL_uid |= PL_gid << 16;
4355 PL_euid |= PL_egid << 16;
4357 /* Should not happen: */
4358 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4359 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4362 * Should go by suidscript, not uid!=euid: why disallow
4363 * system("ls") in scripts run from setuid things?
4364 * Or, is this run before we check arguments and set suidscript?
4365 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4366 * (We never have suidscript, can we be sure to have fdscript?)
4367 * Or must then go by UID checks? See comments in forbid_setid also.
4371 /* This is used very early in the lifetime of the program,
4372 * before even the options are parsed, so PL_tainting has
4373 * not been initialized properly. */
4375 Perl_doing_taint(int argc, char *argv[], char *envp[])
4377 #ifndef PERL_IMPLICIT_SYS
4378 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4379 * before we have an interpreter-- and the whole point of this
4380 * function is to be called at such an early stage. If you are on
4381 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4382 * "tainted because running with altered effective ids', you'll
4383 * have to add your own checks somewhere in here. The two most
4384 * known samples of 'implicitness' are Win32 and NetWare, neither
4385 * of which has much of concept of 'uids'. */
4386 int uid = PerlProc_getuid();
4387 int euid = PerlProc_geteuid();
4388 int gid = PerlProc_getgid();
4389 int egid = PerlProc_getegid();
4396 if (uid && (euid != uid || egid != gid))
4398 #endif /* !PERL_IMPLICIT_SYS */
4399 /* This is a really primitive check; environment gets ignored only
4400 * if -T are the first chars together; otherwise one gets
4401 * "Too late" message. */
4402 if ( argc > 1 && argv[1][0] == '-'
4403 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4408 /* Passing the flag as a single char rather than a string is a slight space
4409 optimisation. The only message that isn't /^-.$/ is
4410 "program input from stdin", which is substituted in place of '\0', which
4411 could never be a command line flag. */
4413 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4416 char string[3] = "-x";
4417 const char *message = "program input from stdin";
4424 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4425 if (PL_euid != PL_uid)
4426 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4427 if (PL_egid != PL_gid)
4428 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4429 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4431 * Checks for UID/GID above "wrong": why disallow
4432 * perl -e 'print "Hello\n"'
4433 * from within setuid things?? Simply drop them: replaced by
4434 * fdscript/suidscript and #ifdef IAMSUID checks below.
4436 * This may be too late for command-line switches. Will catch those on
4437 * the #! line, after finding the script name and setting up
4438 * fdscript/suidscript. Note that suidperl does not get around to
4439 * parsing (and checking) the switches on the #! line, but checks that
4440 * the two sets are identical.
4442 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4443 * instead, or would that be "too late"? (We never have suidscript, can
4444 * we be sure to have fdscript?)
4446 * Catch things with suidscript (in descendant of suidperl), even with
4447 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4448 * below; but I am paranoid.
4450 * Also see comments about root running a setuid script, elsewhere.
4453 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4455 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4456 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4457 #endif /* IAMSUID */
4461 Perl_init_debugger(pTHX)
4464 HV * const ostash = PL_curstash;
4466 PL_curstash = PL_debstash;
4467 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4469 AvREAL_off(PL_dbargs);
4470 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4471 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4472 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4473 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4474 sv_setiv(PL_DBsingle, 0);
4475 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4476 sv_setiv(PL_DBtrace, 0);
4477 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4478 sv_setiv(PL_DBsignal, 0);
4479 PL_curstash = ostash;
4482 #ifndef STRESS_REALLOC
4483 #define REASONABLE(size) (size)
4485 #define REASONABLE(size) (1) /* unreasonable */
4489 Perl_init_stacks(pTHX)
4492 /* start with 128-item stack and 8K cxstack */
4493 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4494 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4495 PL_curstackinfo->si_type = PERLSI_MAIN;
4496 PL_curstack = PL_curstackinfo->si_stack;
4497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4499 PL_stack_base = AvARRAY(PL_curstack);
4500 PL_stack_sp = PL_stack_base;
4501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4503 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4506 PL_tmps_max = REASONABLE(128);
4508 Newx(PL_markstack,REASONABLE(32),I32);
4509 PL_markstack_ptr = PL_markstack;
4510 PL_markstack_max = PL_markstack + REASONABLE(32);
4514 Newx(PL_scopestack,REASONABLE(32),I32);
4515 PL_scopestack_ix = 0;
4516 PL_scopestack_max = REASONABLE(32);
4518 Newx(PL_savestack,REASONABLE(128),ANY);
4519 PL_savestack_ix = 0;
4520 PL_savestack_max = REASONABLE(128);
4529 while (PL_curstackinfo->si_next)
4530 PL_curstackinfo = PL_curstackinfo->si_next;
4531 while (PL_curstackinfo) {
4532 PERL_SI *p = PL_curstackinfo->si_prev;
4533 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4534 Safefree(PL_curstackinfo->si_cxstack);
4535 Safefree(PL_curstackinfo);
4536 PL_curstackinfo = p;
4538 Safefree(PL_tmps_stack);
4539 Safefree(PL_markstack);
4540 Safefree(PL_scopestack);
4541 Safefree(PL_savestack);
4546 S_init_predump_symbols(pTHX)
4552 sv_setpvs(get_sv("\"", TRUE), " ");
4553 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4555 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4556 GvMULTI_on(PL_stdingv);
4557 io = GvIOp(PL_stdingv);
4558 IoTYPE(io) = IoTYPE_RDONLY;
4559 IoIFP(io) = PerlIO_stdin();
4560 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4562 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4564 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4567 IoTYPE(io) = IoTYPE_WRONLY;
4568 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4570 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4572 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4574 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4575 GvMULTI_on(PL_stderrgv);
4576 io = GvIOp(PL_stderrgv);
4577 IoTYPE(io) = IoTYPE_WRONLY;
4578 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4579 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4581 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4583 PL_statname = newSV(0); /* last filename we did stat on */
4585 Safefree(PL_osname);
4586 PL_osname = savepv(OSNAME);
4590 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4594 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4596 argc--,argv++; /* skip name of script */
4597 if (PL_doswitches) {
4598 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4602 if (argv[0][1] == '-' && !argv[0][2]) {
4606 if ((s = strchr(argv[0], '='))) {
4607 const char *const start_name = argv[0] + 1;
4608 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4609 TRUE, SVt_PV)), s + 1);
4612 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4615 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4616 GvMULTI_on(PL_argvgv);
4617 (void)gv_AVadd(PL_argvgv);
4618 av_clear(GvAVn(PL_argvgv));
4619 for (; argc > 0; argc--,argv++) {
4620 SV * const sv = newSVpv(argv[0],0);
4621 av_push(GvAVn(PL_argvgv),sv);
4622 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4623 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4626 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4627 (void)sv_utf8_decode(sv);
4633 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4638 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4640 PL_toptarget = newSV_type(SVt_PVFM);
4641 sv_setpvs(PL_toptarget, "");
4642 PL_bodytarget = newSV_type(SVt_PVFM);
4643 sv_setpvs(PL_bodytarget, "");
4644 PL_formtarget = PL_bodytarget;
4648 init_argv_symbols(argc,argv);
4650 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4651 #ifdef MACOS_TRADITIONAL
4652 /* $0 is not majick on a Mac */
4653 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4655 sv_setpv(GvSV(tmpgv),PL_origfilename);
4657 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4659 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4663 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4665 bool env_is_not_environ;
4666 GvMULTI_on(PL_envgv);
4667 hv = GvHVn(PL_envgv);
4668 hv_magic(hv, NULL, PERL_MAGIC_env);
4670 #ifdef USE_ENVIRON_ARRAY
4671 /* Note that if the supplied env parameter is actually a copy
4672 of the global environ then it may now point to free'd memory
4673 if the environment has been modified since. To avoid this
4674 problem we treat env==NULL as meaning 'use the default'
4678 env_is_not_environ = env != environ;
4679 if (env_is_not_environ
4680 # ifdef USE_ITHREADS
4681 && PL_curinterp == aTHX
4690 for (; *env; env++) {
4693 if (!(s = strchr(old_var,'=')) || s == old_var)
4696 #if defined(MSDOS) && !defined(DJGPP)
4698 (void)strupr(old_var);
4701 sv = newSVpv(s+1, 0);
4702 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4703 if (env_is_not_environ)
4707 #endif /* USE_ENVIRON_ARRAY */
4708 #endif /* !PERL_MICRO */
4711 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4712 SvREADONLY_off(GvSV(tmpgv));
4713 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4714 SvREADONLY_on(GvSV(tmpgv));
4716 #ifdef THREADS_HAVE_PIDS
4717 PL_ppid = (IV)getppid();
4720 /* touch @F array to prevent spurious warnings 20020415 MJD */
4722 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4727 S_init_perllib(pTHX)
4733 s = PerlEnv_getenv("PERL5LIB");
4735 * It isn't possible to delete an environment variable with
4736 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4737 * case we treat PERL5LIB as undefined if it has a zero-length value.
4739 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4740 if (s && *s != '\0')
4744 incpush(s, TRUE, TRUE, TRUE, FALSE, FALSE);
4746 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE, FALSE);
4748 /* Treat PERL5?LIB as a possible search list logical name -- the
4749 * "natural" VMS idiom for a Unix path string. We allow each
4750 * element to be a set of |-separated directories for compatibility.
4754 if (my_trnlnm("PERL5LIB",buf,0))
4755 do { incpush(buf,TRUE,TRUE,TRUE,FALSE, FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4757 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE, FALSE);
4761 /* Use the ~-expanded versions of APPLLIB (undocumented),
4762 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4765 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE, FALSE);
4769 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4771 #ifdef MACOS_TRADITIONAL
4774 SV * privdir = newSV(0);
4775 char * macperl = PerlEnv_getenv("MACPERL");
4780 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4781 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4782 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4783 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4784 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4785 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4787 SvREFCNT_dec(privdir);
4790 incpush(":", FALSE, FALSE, FALSE, FALSE, FALSE);
4793 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4796 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4798 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4802 /* sitearch is always relative to sitelib on Windows for
4803 * DLL-based path intuition to work correctly */
4804 # if !defined(WIN32)
4805 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4811 /* this picks up sitearch as well */
4812 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4814 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4818 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4819 /* Search for version-specific dirs below here */
4820 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4823 #ifdef PERL_VENDORARCH_EXP
4824 /* vendorarch is always relative to vendorlib on Windows for
4825 * DLL-based path intuition to work correctly */
4826 # if !defined(WIN32)
4827 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4831 #ifdef PERL_VENDORLIB_EXP
4833 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE); /* this picks up vendorarch as well */
4835 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4839 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4840 /* Search for version-specific dirs below here */
4841 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4844 #ifdef PERL_OTHERLIBDIRS
4845 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE, FALSE);
4849 incpush(".", FALSE, FALSE, FALSE, FALSE, FALSE);
4850 #endif /* MACOS_TRADITIONAL */
4853 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4854 # define PERLLIB_SEP ';'
4857 # define PERLLIB_SEP '|'
4859 # if defined(MACOS_TRADITIONAL)
4860 # define PERLLIB_SEP ','
4862 # define PERLLIB_SEP ':'
4866 #ifndef PERLLIB_MANGLE
4867 # define PERLLIB_MANGLE(s,n) (s)
4870 /* Push a directory onto @INC if it exists.
4871 Generate a new SV if we do this, to save needing to copy the SV we push
4874 S_incpush_if_exists(pTHX_ SV *dir)
4879 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4881 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4882 S_ISDIR(tmpstatbuf.st_mode)) {
4883 av_push(GvAVn(PL_incgv), dir);
4890 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4891 bool canrelocate, bool unshift)
4895 const char *p = dir;
4900 if (addsubdirs || addoldvers) {
4904 /* Break at all separators */
4906 SV *libdir = newSV(0);
4909 /* skip any consecutive separators */
4911 while ( *p == PERLLIB_SEP ) {
4912 /* Uncomment the next line for PATH semantics */
4913 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4918 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4919 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4924 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4925 p = NULL; /* break out */
4927 #ifdef MACOS_TRADITIONAL
4928 if (!strchr(SvPVX(libdir), ':')) {
4931 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4933 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4934 sv_catpvs(libdir, ":");
4937 /* Do the if() outside the #ifdef to avoid warnings about an unused
4940 #ifdef PERL_RELOCATABLE_INC
4942 * Relocatable include entries are marked with a leading .../
4945 * 0: Remove that leading ".../"
4946 * 1: Remove trailing executable name (anything after the last '/')
4947 * from the perl path to give a perl prefix
4949 * While the @INC element starts "../" and the prefix ends with a real
4950 * directory (ie not . or ..) chop that real directory off the prefix
4951 * and the leading "../" from the @INC element. ie a logical "../"
4953 * Finally concatenate the prefix and the remainder of the @INC element
4954 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4955 * generates /usr/local/lib/perl5
4957 const char *libpath = SvPVX(libdir);
4958 STRLEN libpath_len = SvCUR(libdir);
4959 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4961 SV * const caret_X = get_sv("\030", 0);
4962 /* Going to use the SV just as a scratch buffer holding a C
4968 /* $^X is *the* source of taint if tainting is on, hence
4969 SvPOK() won't be true. */
4971 assert(SvPOKp(caret_X));
4972 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4974 /* Firstly take off the leading .../
4975 If all else fail we'll do the paths relative to the current
4977 sv_chop(libdir, libpath + 4);
4978 /* Don't use SvPV as we're intentionally bypassing taining,
4979 mortal copies that the mg_get of tainting creates, and
4980 corruption that seems to come via the save stack.
4981 I guess that the save stack isn't correctly set up yet. */
4982 libpath = SvPVX(libdir);
4983 libpath_len = SvCUR(libdir);
4985 /* This would work more efficiently with memrchr, but as it's
4986 only a GNU extension we'd need to probe for it and
4987 implement our own. Not hard, but maybe not worth it? */
4989 prefix = SvPVX(prefix_sv);
4990 lastslash = strrchr(prefix, '/');
4992 /* First time in with the *lastslash = '\0' we just wipe off
4993 the trailing /perl from (say) /usr/foo/bin/perl
4997 while ((*lastslash = '\0'), /* Do that, come what may. */
4998 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4999 && (lastslash = strrchr(prefix, '/')))) {
5000 if (lastslash[1] == '\0'
5001 || (lastslash[1] == '.'
5002 && (lastslash[2] == '/' /* ends "/." */
5003 || (lastslash[2] == '/'
5004 && lastslash[3] == '/' /* or "/.." */
5006 /* Prefix ends "/" or "/." or "/..", any of which
5007 are fishy, so don't do any more logical cleanup.
5011 /* Remove leading "../" from path */
5014 /* Next iteration round the loop removes the last
5015 directory name from prefix by writing a '\0' in
5016 the while clause. */
5018 /* prefix has been terminated with a '\0' to the correct
5019 length. libpath points somewhere into the libdir SV.
5020 We need to join the 2 with '/' and drop the result into
5022 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5023 SvREFCNT_dec(libdir);
5024 /* And this is the new libdir. */
5027 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5028 /* Need to taint reloccated paths if running set ID */
5029 SvTAINTED_on(libdir);
5032 SvREFCNT_dec(prefix_sv);
5037 * BEFORE pushing libdir onto @INC we may first push version- and
5038 * archname-specific sub-directories.
5040 if (addsubdirs || addoldvers) {
5041 #ifdef PERL_INC_VERSION_LIST
5042 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5043 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5044 const char * const *incver;
5050 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5052 while (unix[len-1] == '/') len--; /* Cosmetic */
5053 sv_usepvn(libdir,unix,len);
5056 PerlIO_printf(Perl_error_log,
5057 "Failed to unixify @INC element \"%s\"\n",
5061 #ifdef MACOS_TRADITIONAL
5062 #define PERL_AV_SUFFIX_FMT ""
5063 #define PERL_ARCH_FMT "%s:"
5064 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5066 #define PERL_AV_SUFFIX_FMT "/"
5067 #define PERL_ARCH_FMT "/%s"
5068 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5070 /* .../version/archname if -d .../version/archname */
5071 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5073 (int)PERL_REVISION, (int)PERL_VERSION,
5074 (int)PERL_SUBVERSION, ARCHNAME);
5075 subdir = S_incpush_if_exists(aTHX_ subdir);
5077 /* .../version if -d .../version */
5078 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5080 (int)PERL_REVISION, (int)PERL_VERSION,
5081 (int)PERL_SUBVERSION);
5082 subdir = S_incpush_if_exists(aTHX_ subdir);
5084 /* .../archname if -d .../archname */
5085 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5086 SVfARG(libdir), ARCHNAME);
5087 subdir = S_incpush_if_exists(aTHX_ subdir);
5091 #ifdef PERL_INC_VERSION_LIST
5093 for (incver = incverlist; *incver; incver++) {
5094 /* .../xxx if -d .../xxx */
5095 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5096 SVfARG(libdir), *incver);
5097 subdir = S_incpush_if_exists(aTHX_ subdir);
5103 /* finally add this lib directory at the end of @INC */
5105 av_unshift( GvAVn( PL_incgv ), 1 );
5106 av_store( GvAVn( PL_incgv ), 0, libdir );
5109 av_push(GvAVn(PL_incgv), libdir);
5113 assert (SvREFCNT(subdir) == 1);
5114 SvREFCNT_dec(subdir);
5120 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5124 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5130 PERL_ARGS_ASSERT_CALL_LIST;
5132 while (av_len(paramList) >= 0) {
5133 cv = MUTABLE_CV(av_shift(paramList));
5135 if (paramList == PL_beginav) {
5136 /* save PL_beginav for compiler */
5137 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5139 else if (paramList == PL_checkav) {
5140 /* save PL_checkav for compiler */
5141 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5143 else if (paramList == PL_unitcheckav) {
5144 /* save PL_unitcheckav for compiler */
5145 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5156 PL_madskills |= 16384;
5161 PL_madskills &= ~16384;
5164 (void)SvPV_const(atsv, len);
5166 PL_curcop = &PL_compiling;
5167 CopLINE_set(PL_curcop, oldline);
5168 if (paramList == PL_beginav)
5169 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5171 Perl_sv_catpvf(aTHX_ atsv,
5172 "%s failed--call queue aborted",
5173 paramList == PL_checkav ? "CHECK"
5174 : paramList == PL_initav ? "INIT"
5175 : paramList == PL_unitcheckav ? "UNITCHECK"
5177 while (PL_scopestack_ix > oldscope)
5180 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5187 /* my_exit() was called */
5188 while (PL_scopestack_ix > oldscope)
5191 PL_curstash = PL_defstash;
5192 PL_curcop = &PL_compiling;
5193 CopLINE_set(PL_curcop, oldline);
5195 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5196 if (paramList == PL_beginav)
5197 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5199 Perl_croak(aTHX_ "%s failed--call queue aborted",
5200 paramList == PL_checkav ? "CHECK"
5201 : paramList == PL_initav ? "INIT"
5202 : paramList == PL_unitcheckav ? "UNITCHECK"
5209 PL_curcop = &PL_compiling;
5210 CopLINE_set(PL_curcop, oldline);
5213 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5222 Perl_my_exit(pTHX_ U32 status)
5233 STATUS_EXIT_SET(status);
5240 Perl_my_failure_exit(pTHX)
5244 /* We have been called to fall on our sword. The desired exit code
5245 * should be already set in STATUS_UNIX, but could be shifted over
5246 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5249 * If an error code has not been set, then force the issue.
5251 if (MY_POSIX_EXIT) {
5253 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5254 * the exit code when there isn't an error.
5257 if (STATUS_UNIX == 0)
5258 STATUS_UNIX_EXIT_SET(255);
5260 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5262 /* The exit code could have been set by $? or vmsish which
5263 * means that it may not be fatal. So convert
5264 * success/warning codes to fatal.
5266 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5267 STATUS_UNIX_EXIT_SET(255);
5271 /* Traditionally Perl on VMS always expects a Fatal Error. */
5272 if (vaxc$errno & 1) {
5274 /* So force success status to failure */
5275 if (STATUS_NATIVE & 1)
5280 STATUS_UNIX = EINTR; /* In case something cares */
5285 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5287 /* Encode the severity code */
5288 severity = STATUS_NATIVE & STS$M_SEVERITY;
5289 STATUS_UNIX = (severity ? severity : 1) << 8;
5291 /* Perl expects this to be a fatal error */
5292 if (severity != STS$K_SEVERE)
5301 STATUS_UNIX_SET(errno);
5303 exitstatus = STATUS_UNIX >> 8;
5304 if (exitstatus & 255)
5305 STATUS_UNIX_SET(exitstatus);
5307 STATUS_UNIX_SET(255);
5314 S_my_exit_jump(pTHX)
5319 SvREFCNT_dec(PL_e_script);
5323 POPSTACK_TO(PL_mainstack);
5331 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5334 const char * const p = SvPVX_const(PL_e_script);
5335 const char *nl = strchr(p, '\n');
5337 PERL_UNUSED_ARG(idx);
5338 PERL_UNUSED_ARG(maxlen);
5340 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5342 filter_del(read_e_script);
5345 sv_catpvn(buf_sv, p, nl-p);
5346 sv_chop(PL_e_script, nl);
5352 * c-indentation-style: bsd
5354 * indent-tabs-mode: t
5357 * ex: set ts=8 sts=4 sw=4 noet: