3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
130 /* Drop scriptname */
131 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, fdscript, suidscript, linestr_sv, rsfp)
133 /* Drop suidscript */
134 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, scriptname, fdscript, linestr_sv, rsfp)
137 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
138 /* Drop everything. Heck, don't even try to call it */
139 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
141 /* Drop almost everything */
142 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
146 #define CALL_BODY_EVAL(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entereval(aTHX); \
152 #define CALL_BODY_SUB(myop) \
153 if (PL_op == (myop)) \
154 PL_op = Perl_pp_entersub(aTHX); \
158 #define CALL_LIST_BODY(cv) \
159 PUSHMARK(PL_stack_sp); \
160 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
163 S_init_tls_and_interp(PerlInterpreter *my_perl)
167 PERL_SET_INTERP(my_perl);
168 #if defined(USE_ITHREADS)
171 PERL_SET_THX(my_perl);
174 MUTEX_INIT(&PL_dollarzero_mutex);
176 #ifdef PERL_IMPLICIT_CONTEXT
177 MUTEX_INIT(&PL_my_ctx_mutex);
180 #if defined(USE_ITHREADS)
183 /* This always happens for non-ithreads */
186 PERL_SET_THX(my_perl);
191 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
194 Perl_sys_init(int* argc, char*** argv)
198 PERL_ARGS_ASSERT_SYS_INIT;
200 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
201 PERL_UNUSED_ARG(argv);
202 PERL_SYS_INIT_BODY(argc, argv);
206 Perl_sys_init3(int* argc, char*** argv, char*** env)
210 PERL_ARGS_ASSERT_SYS_INIT3;
212 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
213 PERL_UNUSED_ARG(argv);
214 PERL_UNUSED_ARG(env);
215 PERL_SYS_INIT3_BODY(argc, argv, env);
222 if (!PL_veto_cleanup) {
223 PERL_SYS_TERM_BODY();
228 #ifdef PERL_IMPLICIT_SYS
230 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
231 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
232 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
233 struct IPerlDir* ipD, struct IPerlSock* ipS,
234 struct IPerlProc* ipP)
236 PerlInterpreter *my_perl;
238 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
240 /* Newx() needs interpreter, so call malloc() instead */
241 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
242 S_init_tls_and_interp(my_perl);
243 Zero(my_perl, 1, PerlInterpreter);
253 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
260 =head1 Embedding Functions
262 =for apidoc perl_alloc
264 Allocates a new Perl interpreter. See L<perlembed>.
272 PerlInterpreter *my_perl;
274 /* Newx() needs interpreter, so call malloc() instead */
275 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
277 S_init_tls_and_interp(my_perl);
278 #ifndef PERL_TRACK_MEMPOOL
279 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
281 Zero(my_perl, 1, PerlInterpreter);
282 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
286 #endif /* PERL_IMPLICIT_SYS */
289 =for apidoc perl_construct
291 Initializes a new Perl interpreter. See L<perlembed>.
297 perl_construct(pTHXx)
301 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
305 PL_perl_destruct_level = 1;
307 PERL_UNUSED_ARG(my_perl);
308 if (PL_perl_destruct_level > 0)
311 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
313 /* set read-only and try to insure than we wont see REFCNT==0
316 SvREADONLY_on(&PL_sv_undef);
317 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
319 sv_setpv(&PL_sv_no,PL_No);
320 /* value lookup in void context - happens to have the side effect
321 of caching the numeric forms. However, as &PL_sv_no doesn't contain
322 a string that is a valid numer, we have to turn the public flags by
328 SvREADONLY_on(&PL_sv_no);
329 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
331 sv_setpv(&PL_sv_yes,PL_Yes);
334 SvREADONLY_on(&PL_sv_yes);
335 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
337 SvREADONLY_on(&PL_sv_placeholder);
338 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
340 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
341 #ifdef PERL_USES_PL_PIDSTATUS
342 PL_pidstatus = newHV();
345 PL_rs = newSVpvs("\n");
355 SET_NUMERIC_STANDARD();
357 #if defined(LOCAL_PATCH_COUNT)
358 PL_localpatches = local_patches; /* For possible -v */
361 #ifdef HAVE_INTERP_INTERN
365 PerlIO_init(aTHX); /* Hook to IO system */
367 PL_fdpid = newAV(); /* for remembering popen pids by fd */
368 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
369 PL_errors = newSVpvs("");
370 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
371 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
372 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
374 /* First entry is a list of empty elements. It needs to be initialised
375 else all hell breaks loose in S_find_uninit_var(). */
376 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
377 PL_regex_pad = AvARRAY(PL_regex_padav);
379 #ifdef USE_REENTRANT_API
380 Perl_reentrant_init(aTHX);
383 /* Note that strtab is a rather special HV. Assumptions are made
384 about not iterating on it, and not adding tie magic to it.
385 It is properly deallocated in perl_destruct() */
388 HvSHAREKEYS_off(PL_strtab); /* mandatory */
389 hv_ksplit(PL_strtab, 512);
391 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
392 _dyld_lookup_and_bind
393 ("__environ", (unsigned long *) &environ_pointer, NULL);
397 # ifdef USE_ENVIRON_ARRAY
398 PL_origenviron = environ;
402 /* Use sysconf(_SC_CLK_TCK) if available, if not
403 * available or if the sysconf() fails, use the HZ.
404 * BeOS has those, but returns the wrong value.
405 * The HZ if not originally defined has been by now
406 * been defined as CLK_TCK, if available. */
407 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
408 PL_clocktick = sysconf(_SC_CLK_TCK);
409 if (PL_clocktick <= 0)
413 PL_stashcache = newHV();
415 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
416 (int)PERL_VERSION, (int)PERL_SUBVERSION);
419 if (!PL_mmap_page_size) {
420 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
422 SETERRNO(0, SS_NORMAL);
424 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
426 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
428 if ((long) PL_mmap_page_size < 0) {
430 SV * const error = ERRSV;
431 SvUPGRADE(error, SVt_PV);
432 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
435 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
439 # ifdef HAS_GETPAGESIZE
440 PL_mmap_page_size = getpagesize();
442 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
443 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
447 if (PL_mmap_page_size <= 0)
448 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
449 (IV) PL_mmap_page_size);
451 #endif /* HAS_MMAP */
453 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
454 PL_timesbase.tms_utime = 0;
455 PL_timesbase.tms_stime = 0;
456 PL_timesbase.tms_cutime = 0;
457 PL_timesbase.tms_cstime = 0;
464 =for apidoc nothreadhook
466 Stub that provides thread hook for perl_destruct when there are
473 Perl_nothreadhook(pTHX)
479 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
481 Perl_dump_sv_child(pTHX_ SV *sv)
484 const int sock = PL_dumper_fd;
485 const int debug_fd = PerlIO_fileno(Perl_debug_log);
486 union control_un control;
489 struct cmsghdr *cmptr;
491 unsigned char buffer[256];
493 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
495 if(sock == -1 || debug_fd == -1)
498 PerlIO_flush(Perl_debug_log);
500 /* All these shenanigans are to pass a file descriptor over to our child for
501 it to dump out to. We can't let it hold open the file descriptor when it
502 forks, as the file descriptor it will dump to can turn out to be one end
503 of pipe that some other process will wait on for EOF. (So as it would
504 be open, the wait would be forever.) */
506 msg.msg_control = control.control;
507 msg.msg_controllen = sizeof(control.control);
508 /* We're a connected socket so we don't need a destination */
514 cmptr = CMSG_FIRSTHDR(&msg);
515 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
516 cmptr->cmsg_level = SOL_SOCKET;
517 cmptr->cmsg_type = SCM_RIGHTS;
518 *((int *)CMSG_DATA(cmptr)) = 1;
520 vec[0].iov_base = (void*)&sv;
521 vec[0].iov_len = sizeof(sv);
522 got = sendmsg(sock, &msg, 0);
525 perror("Debug leaking scalars parent sendmsg failed");
528 if(got < sizeof(sv)) {
529 perror("Debug leaking scalars parent short sendmsg");
533 /* Return protocol is
535 unsigned char: length of location string (0 for empty)
536 unsigned char*: string (not terminated)
538 vec[0].iov_base = (void*)&returned_errno;
539 vec[0].iov_len = sizeof(returned_errno);
540 vec[1].iov_base = buffer;
543 got = readv(sock, vec, 2);
546 perror("Debug leaking scalars parent read failed");
547 PerlIO_flush(PerlIO_stderr());
550 if(got < sizeof(returned_errno) + 1) {
551 perror("Debug leaking scalars parent short read");
552 PerlIO_flush(PerlIO_stderr());
557 got = read(sock, buffer + 1, *buffer);
559 perror("Debug leaking scalars parent read 2 failed");
560 PerlIO_flush(PerlIO_stderr());
565 perror("Debug leaking scalars parent short read 2");
566 PerlIO_flush(PerlIO_stderr());
571 if (returned_errno || *buffer) {
572 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
573 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
574 returned_errno, strerror(returned_errno));
580 =for apidoc perl_destruct
582 Shuts down a Perl interpreter. See L<perlembed>.
591 VOL signed char destruct_level; /* see possible values in intrpvar.h */
593 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
597 PERL_ARGS_ASSERT_PERL_DESTRUCT;
599 PERL_UNUSED_ARG(my_perl);
602 /* wait for all pseudo-forked children to finish */
603 PERL_WAIT_FOR_CHILDREN;
605 destruct_level = PL_perl_destruct_level;
608 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
610 const int i = atoi(s);
611 if (destruct_level < i)
617 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
623 if (PL_endav && !PL_minus_c)
624 call_list(PL_scopestack_ix, PL_endav);
630 /* Need to flush since END blocks can produce output */
633 if (CALL_FPTR(PL_threadhook)(aTHX)) {
634 /* Threads hook has vetoed further cleanup */
635 PL_veto_cleanup = TRUE;
639 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
640 if (destruct_level != 0) {
641 /* Fork here to create a child. Our child's job is to preserve the
642 state of scalars prior to destruction, so that we can instruct it
643 to dump any scalars that we later find have leaked.
644 There's no subtlety in this code - it assumes POSIX, and it doesn't
648 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
649 perror("Debug leaking scalars socketpair failed");
655 perror("Debug leaking scalars fork failed");
659 /* We are the child */
660 const int sock = fd[1];
661 const int debug_fd = PerlIO_fileno(Perl_debug_log);
664 /* Our success message is an integer 0, and a char 0 */
665 static const char success[sizeof(int) + 1];
669 /* We need to close all other file descriptors otherwise we end up
670 with interesting hangs, where the parent closes its end of a
671 pipe, and sits waiting for (another) child to terminate. Only
672 that child never terminates, because it never gets EOF, because
673 we also have the far end of the pipe open. We even need to
674 close the debugging fd, because sometimes it happens to be one
675 end of a pipe, and a process is waiting on the other end for
676 EOF. Normally it would be closed at some point earlier in
677 destruction, but if we happen to cause the pipe to remain open,
678 EOF never occurs, and we get an infinite hang. Hence all the
679 games to pass in a file descriptor if it's actually needed. */
681 f = sysconf(_SC_OPEN_MAX);
683 where = "sysconf failed";
694 union control_un control;
697 struct cmsghdr *cmptr;
701 msg.msg_control = control.control;
702 msg.msg_controllen = sizeof(control.control);
703 /* We're a connected socket so we don't need a source */
707 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
709 vec[0].iov_base = (void*)⌖
710 vec[0].iov_len = sizeof(target);
712 got = recvmsg(sock, &msg, 0);
717 where = "recv failed";
720 if(got < sizeof(target)) {
721 where = "short recv";
725 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
729 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
730 where = "wrong cmsg_len";
733 if(cmptr->cmsg_level != SOL_SOCKET) {
734 where = "wrong cmsg_level";
737 if(cmptr->cmsg_type != SCM_RIGHTS) {
738 where = "wrong cmsg_type";
742 got_fd = *(int*)CMSG_DATA(cmptr);
743 /* For our last little bit of trickery, put the file descriptor
744 back into Perl_debug_log, as if we never actually closed it
746 if(got_fd != debug_fd) {
747 if (dup2(got_fd, debug_fd) == -1) {
754 PerlIO_flush(Perl_debug_log);
756 got = write(sock, &success, sizeof(success));
759 where = "write failed";
762 if(got < sizeof(success)) {
763 where = "short write";
770 int send_errno = errno;
771 unsigned char length = (unsigned char) strlen(where);
772 struct iovec failure[3] = {
773 {(void*)&send_errno, sizeof(send_errno)},
775 {(void*)where, length}
777 int got = writev(sock, failure, 3);
778 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
779 in the parent if we try to read from the socketpair after the
780 child has exited, even if there was data to read.
781 So sleep a bit to give the parent a fighting chance of
784 _exit((got == -1) ? errno : 0);
788 PL_dumper_fd = fd[0];
793 /* We must account for everything. */
795 /* Destroy the main CV and syntax tree */
796 /* Do this now, because destroying ops can cause new SVs to be generated
797 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
798 PL_curcop to point to a valid op from which the filename structure
800 PL_curcop = &PL_compiling;
802 /* ensure comppad/curpad to refer to main's pad */
803 if (CvPADLIST(PL_main_cv)) {
804 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
806 op_free(PL_main_root);
809 PL_main_start = NULL;
810 SvREFCNT_dec(PL_main_cv);
814 /* Tell PerlIO we are about to tear things apart in case
815 we have layers which are using resources that should
819 PerlIO_destruct(aTHX);
821 if (PL_sv_objcount) {
823 * Try to destruct global references. We do this first so that the
824 * destructors and destructees still exist. Some sv's might remain.
825 * Non-referenced objects are on their own.
829 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
830 PL_defoutgv = NULL; /* may have been freed */
833 /* unhook hooks which will soon be, or use, destroyed data */
834 SvREFCNT_dec(PL_warnhook);
836 SvREFCNT_dec(PL_diehook);
839 /* call exit list functions */
840 while (PL_exitlistlen-- > 0)
841 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
843 Safefree(PL_exitlist);
848 /* jettison our possibly duplicated environment */
849 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
850 * so we certainly shouldn't free it here
853 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
854 if (environ != PL_origenviron && !PL_use_safe_putenv
856 /* only main thread can free environ[0] contents */
857 && PL_curinterp == aTHX
863 for (i = 0; environ[i]; i++)
864 safesysfree(environ[i]);
866 /* Must use safesysfree() when working with environ. */
867 safesysfree(environ);
869 environ = PL_origenviron;
872 #endif /* !PERL_MICRO */
874 if (destruct_level == 0) {
876 DEBUG_P(debprofdump());
878 #if defined(PERLIO_LAYERS)
879 /* No more IO - including error messages ! */
880 PerlIO_cleanup(aTHX);
883 CopFILE_free(&PL_compiling);
884 CopSTASH_free(&PL_compiling);
886 /* The exit() function will do everything that needs doing. */
890 /* reset so print() ends up where we expect */
894 /* the syntax tree is shared between clones
895 * so op_free(PL_main_root) only ReREFCNT_dec's
896 * REGEXPs in the parent interpreter
897 * we need to manually ReREFCNT_dec for the clones
899 SvREFCNT_dec(PL_regex_padav);
900 PL_regex_padav = NULL;
904 SvREFCNT_dec((SV*) PL_stashcache);
905 PL_stashcache = NULL;
907 /* loosen bonds of global variables */
909 /* XXX can PL_parser still be non-null here? */
910 if(PL_parser && PL_parser->rsfp) {
911 (void)PerlIO_close(PL_parser->rsfp);
912 PL_parser->rsfp = NULL;
916 Safefree(PL_splitstr);
926 PL_doswitches = FALSE;
927 PL_dowarn = G_WARN_OFF;
928 PL_doextract = FALSE;
929 PL_sawampersand = FALSE; /* must save all match strings */
932 Safefree(PL_inplace);
934 SvREFCNT_dec(PL_patchlevel);
937 SvREFCNT_dec(PL_e_script);
943 /* magical thingies */
945 SvREFCNT_dec(PL_ofs_sv); /* $, */
948 SvREFCNT_dec(PL_ors_sv); /* $\ */
951 SvREFCNT_dec(PL_rs); /* $/ */
954 Safefree(PL_osname); /* $^O */
957 SvREFCNT_dec(PL_statname);
961 /* defgv, aka *_ should be taken care of elsewhere */
963 /* clean up after study() */
964 SvREFCNT_dec(PL_lastscream);
965 PL_lastscream = NULL;
966 Safefree(PL_screamfirst);
968 Safefree(PL_screamnext);
972 Safefree(PL_efloatbuf);
976 /* startup and shutdown function lists */
977 SvREFCNT_dec(PL_beginav);
978 SvREFCNT_dec(PL_beginav_save);
979 SvREFCNT_dec(PL_endav);
980 SvREFCNT_dec(PL_checkav);
981 SvREFCNT_dec(PL_checkav_save);
982 SvREFCNT_dec(PL_unitcheckav);
983 SvREFCNT_dec(PL_unitcheckav_save);
984 SvREFCNT_dec(PL_initav);
986 PL_beginav_save = NULL;
989 PL_checkav_save = NULL;
990 PL_unitcheckav = NULL;
991 PL_unitcheckav_save = NULL;
994 /* shortcuts just get cleared */
1000 PL_argvoutgv = NULL;
1003 PL_last_in_gv = NULL;
1015 SvREFCNT_dec(PL_argvout_stack);
1016 PL_argvout_stack = NULL;
1018 SvREFCNT_dec(PL_modglobal);
1019 PL_modglobal = NULL;
1020 SvREFCNT_dec(PL_preambleav);
1021 PL_preambleav = NULL;
1022 SvREFCNT_dec(PL_subname);
1024 #ifdef PERL_USES_PL_PIDSTATUS
1025 SvREFCNT_dec(PL_pidstatus);
1026 PL_pidstatus = NULL;
1028 SvREFCNT_dec(PL_toptarget);
1029 PL_toptarget = NULL;
1030 SvREFCNT_dec(PL_bodytarget);
1031 PL_bodytarget = NULL;
1032 PL_formtarget = NULL;
1034 /* free locale stuff */
1035 #ifdef USE_LOCALE_COLLATE
1036 Safefree(PL_collation_name);
1037 PL_collation_name = NULL;
1040 #ifdef USE_LOCALE_NUMERIC
1041 Safefree(PL_numeric_name);
1042 PL_numeric_name = NULL;
1043 SvREFCNT_dec(PL_numeric_radix_sv);
1044 PL_numeric_radix_sv = NULL;
1047 /* clear utf8 character classes */
1048 SvREFCNT_dec(PL_utf8_alnum);
1049 SvREFCNT_dec(PL_utf8_alnumc);
1050 SvREFCNT_dec(PL_utf8_ascii);
1051 SvREFCNT_dec(PL_utf8_alpha);
1052 SvREFCNT_dec(PL_utf8_space);
1053 SvREFCNT_dec(PL_utf8_cntrl);
1054 SvREFCNT_dec(PL_utf8_graph);
1055 SvREFCNT_dec(PL_utf8_digit);
1056 SvREFCNT_dec(PL_utf8_upper);
1057 SvREFCNT_dec(PL_utf8_lower);
1058 SvREFCNT_dec(PL_utf8_print);
1059 SvREFCNT_dec(PL_utf8_punct);
1060 SvREFCNT_dec(PL_utf8_xdigit);
1061 SvREFCNT_dec(PL_utf8_mark);
1062 SvREFCNT_dec(PL_utf8_toupper);
1063 SvREFCNT_dec(PL_utf8_totitle);
1064 SvREFCNT_dec(PL_utf8_tolower);
1065 SvREFCNT_dec(PL_utf8_tofold);
1066 SvREFCNT_dec(PL_utf8_idstart);
1067 SvREFCNT_dec(PL_utf8_idcont);
1068 PL_utf8_alnum = NULL;
1069 PL_utf8_alnumc = NULL;
1070 PL_utf8_ascii = NULL;
1071 PL_utf8_alpha = NULL;
1072 PL_utf8_space = NULL;
1073 PL_utf8_cntrl = NULL;
1074 PL_utf8_graph = NULL;
1075 PL_utf8_digit = NULL;
1076 PL_utf8_upper = NULL;
1077 PL_utf8_lower = NULL;
1078 PL_utf8_print = NULL;
1079 PL_utf8_punct = NULL;
1080 PL_utf8_xdigit = NULL;
1081 PL_utf8_mark = NULL;
1082 PL_utf8_toupper = NULL;
1083 PL_utf8_totitle = NULL;
1084 PL_utf8_tolower = NULL;
1085 PL_utf8_tofold = NULL;
1086 PL_utf8_idstart = NULL;
1087 PL_utf8_idcont = NULL;
1089 if (!specialWARN(PL_compiling.cop_warnings))
1090 PerlMemShared_free(PL_compiling.cop_warnings);
1091 PL_compiling.cop_warnings = NULL;
1092 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1093 PL_compiling.cop_hints_hash = NULL;
1094 CopFILE_free(&PL_compiling);
1095 CopSTASH_free(&PL_compiling);
1097 /* Prepare to destruct main symbol table. */
1102 SvREFCNT_dec(PL_curstname);
1103 PL_curstname = NULL;
1105 /* clear queued errors */
1106 SvREFCNT_dec(PL_errors);
1109 SvREFCNT_dec(PL_isarev);
1112 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1113 if (PL_scopestack_ix != 0)
1114 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1115 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1116 (long)PL_scopestack_ix);
1117 if (PL_savestack_ix != 0)
1118 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1119 "Unbalanced saves: %ld more saves than restores\n",
1120 (long)PL_savestack_ix);
1121 if (PL_tmps_floor != -1)
1122 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1123 (long)PL_tmps_floor + 1);
1124 if (cxstack_ix != -1)
1125 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1126 (long)cxstack_ix + 1);
1129 /* Now absolutely destruct everything, somehow or other, loops or no. */
1130 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1131 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1133 /* the 2 is for PL_fdpid and PL_strtab */
1134 while (PL_sv_count > 2 && sv_clean_all())
1137 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1138 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1139 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1140 SvFLAGS(PL_strtab) |= SVt_PVHV;
1142 AvREAL_off(PL_fdpid); /* no surviving entries */
1143 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1146 #ifdef HAVE_INTERP_INTERN
1150 /* Destruct the global string table. */
1152 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1153 * so that sv_free() won't fail on them.
1154 * Now that the global string table is using a single hunk of memory
1155 * for both HE and HEK, we either need to explicitly unshare it the
1156 * correct way, or actually free things here.
1159 const I32 max = HvMAX(PL_strtab);
1160 HE * const * const array = HvARRAY(PL_strtab);
1161 HE *hent = array[0];
1164 if (hent && ckWARN_d(WARN_INTERNAL)) {
1165 HE * const next = HeNEXT(hent);
1166 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1167 "Unbalanced string table refcount: (%ld) for \"%s\"",
1168 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1175 hent = array[riter];
1180 HvARRAY(PL_strtab) = 0;
1181 HvTOTALKEYS(PL_strtab) = 0;
1182 HvFILL(PL_strtab) = 0;
1184 SvREFCNT_dec(PL_strtab);
1187 /* free the pointer tables used for cloning */
1188 ptr_table_free(PL_ptr_table);
1189 PL_ptr_table = (PTR_TBL_t*)NULL;
1192 /* free special SVs */
1194 SvREFCNT(&PL_sv_yes) = 0;
1195 sv_clear(&PL_sv_yes);
1196 SvANY(&PL_sv_yes) = NULL;
1197 SvFLAGS(&PL_sv_yes) = 0;
1199 SvREFCNT(&PL_sv_no) = 0;
1200 sv_clear(&PL_sv_no);
1201 SvANY(&PL_sv_no) = NULL;
1202 SvFLAGS(&PL_sv_no) = 0;
1206 for (i=0; i<=2; i++) {
1207 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1208 sv_clear(PERL_DEBUG_PAD(i));
1209 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1210 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1214 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1215 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1217 #ifdef DEBUG_LEAKING_SCALARS
1218 if (PL_sv_count != 0) {
1223 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1224 svend = &sva[SvREFCNT(sva)];
1225 for (sv = sva + 1; sv < svend; ++sv) {
1226 if (SvTYPE(sv) != SVTYPEMASK) {
1227 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1229 " refcnt=%"UVuf pTHX__FORMAT "\n"
1230 "\tallocated at %s:%d %s %s%s\n",
1231 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1233 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1235 sv->sv_debug_inpad ? "for" : "by",
1236 sv->sv_debug_optype ?
1237 PL_op_name[sv->sv_debug_optype]: "(none)",
1238 sv->sv_debug_cloned ? " (cloned)" : ""
1240 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1241 Perl_dump_sv_child(aTHX_ sv);
1247 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1251 /* Wait for up to 4 seconds for child to terminate.
1252 This seems to be the least effort way of timing out on reaping
1254 struct timeval waitfor = {4, 0};
1255 int sock = PL_dumper_fd;
1259 FD_SET(sock, &rset);
1260 select(sock + 1, &rset, NULL, NULL, &waitfor);
1261 waitpid(child, &status, WNOHANG);
1266 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1272 #ifdef PERL_DEBUG_READONLY_OPS
1278 #if defined(PERLIO_LAYERS)
1279 /* No more IO - including error messages ! */
1280 PerlIO_cleanup(aTHX);
1283 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1284 as currently layers use it rather than NULL as a marker
1285 for no arg - and will try and SvREFCNT_dec it.
1287 SvREFCNT(&PL_sv_undef) = 0;
1288 SvREADONLY_off(&PL_sv_undef);
1290 Safefree(PL_origfilename);
1291 PL_origfilename = NULL;
1292 Safefree(PL_reg_start_tmp);
1293 PL_reg_start_tmp = (char**)NULL;
1294 PL_reg_start_tmpl = 0;
1295 Safefree(PL_reg_curpm);
1296 Safefree(PL_reg_poscache);
1297 free_tied_hv_pool();
1298 Safefree(PL_op_mask);
1299 Safefree(PL_psig_ptr);
1300 PL_psig_ptr = (SV**)NULL;
1301 Safefree(PL_psig_name);
1302 PL_psig_name = (SV**)NULL;
1303 Safefree(PL_bitcount);
1305 Safefree(PL_psig_pend);
1306 PL_psig_pend = (int*)NULL;
1309 PL_tainting = FALSE;
1310 PL_taint_warn = FALSE;
1311 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1314 DEBUG_P(debprofdump());
1316 #ifdef USE_REENTRANT_API
1317 Perl_reentrant_free(aTHX);
1322 while (PL_regmatch_slab) {
1323 regmatch_slab *s = PL_regmatch_slab;
1324 PL_regmatch_slab = PL_regmatch_slab->next;
1328 /* As the absolutely last thing, free the non-arena SV for mess() */
1331 /* we know that type == SVt_PVMG */
1333 /* it could have accumulated taint magic */
1336 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1337 moremagic = mg->mg_moremagic;
1338 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1340 Safefree(mg->mg_ptr);
1344 /* we know that type >= SVt_PV */
1345 SvPV_free(PL_mess_sv);
1346 Safefree(SvANY(PL_mess_sv));
1347 Safefree(PL_mess_sv);
1354 =for apidoc perl_free
1356 Releases a Perl interpreter. See L<perlembed>.
1366 PERL_ARGS_ASSERT_PERL_FREE;
1368 if (PL_veto_cleanup)
1371 #ifdef PERL_TRACK_MEMPOOL
1374 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1375 * value as we're probably hunting memory leaks then
1377 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1378 if (!s || atoi(s) == 0) {
1379 const U32 old_debug = PL_debug;
1380 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1381 thread at thread exit. */
1383 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1384 "free this thread's memory\n");
1385 PL_debug &= ~ DEBUG_m_FLAG;
1387 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1388 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1389 PL_debug = old_debug;
1394 #if defined(WIN32) || defined(NETWARE)
1395 # if defined(PERL_IMPLICIT_SYS)
1398 void *host = nw_internal_host;
1400 void *host = w32_internal_host;
1402 PerlMem_free(aTHXx);
1404 nw_delete_internal_host(host);
1406 win32_delete_internal_host(host);
1410 PerlMem_free(aTHXx);
1413 PerlMem_free(aTHXx);
1417 #if defined(USE_ITHREADS)
1418 /* provide destructors to clean up the thread key when libperl is unloaded */
1419 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1421 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1422 #pragma fini "perl_fini"
1423 #elif defined(__sun) && !defined(__GNUC__)
1424 #pragma fini (perl_fini)
1428 #if defined(__GNUC__)
1429 __attribute__((destructor))
1434 if (PL_curinterp && !PL_veto_cleanup)
1439 #endif /* THREADS */
1442 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1445 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1446 PL_exitlist[PL_exitlistlen].fn = fn;
1447 PL_exitlist[PL_exitlistlen].ptr = ptr;
1451 #ifdef HAS_PROCSELFEXE
1452 /* This is a function so that we don't hold on to MAXPATHLEN
1453 bytes of stack longer than necessary
1456 S_procself_val(pTHX_ SV *sv, const char *arg0)
1458 char buf[MAXPATHLEN];
1459 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1461 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1462 includes a spurious NUL which will cause $^X to fail in system
1463 or backticks (this will prevent extensions from being built and
1464 many tests from working). readlink is not meant to add a NUL.
1465 Normal readlink works fine.
1467 if (len > 0 && buf[len-1] == '\0') {
1471 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1472 returning the text "unknown" from the readlink rather than the path
1473 to the executable (or returning an error from the readlink). Any valid
1474 path has a '/' in it somewhere, so use that to validate the result.
1475 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1477 if (len > 0 && memchr(buf, '/', len)) {
1478 sv_setpvn(sv,buf,len);
1484 #endif /* HAS_PROCSELFEXE */
1487 S_set_caret_X(pTHX) {
1489 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1491 #ifdef HAS_PROCSELFEXE
1492 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1495 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1497 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1504 =for apidoc perl_parse
1506 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1512 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1519 PERL_ARGS_ASSERT_PERL_PARSE;
1520 #ifndef MULTIPLICITY
1521 PERL_UNUSED_ARG(my_perl);
1524 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1525 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1526 "execute\nsetuid perl scripts securely.\n");
1529 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1530 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1531 * This MUST be done before any hash stores or fetches take place.
1532 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1533 * yourself, it is your responsibility to provide a good random seed!
1534 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1535 if (!PL_rehash_seed_set)
1536 PL_rehash_seed = get_hash_seed();
1538 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1540 if (s && (atoi(s) == 1))
1541 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1543 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1548 if (PL_origalen != 0) {
1549 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1552 /* Set PL_origalen be the sum of the contiguous argv[]
1553 * elements plus the size of the env in case that it is
1554 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1555 * as the maximum modifiable length of $0. In the worst case
1556 * the area we are able to modify is limited to the size of
1557 * the original argv[0]. (See below for 'contiguous', though.)
1559 const char *s = NULL;
1562 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1563 /* Do the mask check only if the args seem like aligned. */
1565 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1567 /* See if all the arguments are contiguous in memory. Note
1568 * that 'contiguous' is a loose term because some platforms
1569 * align the argv[] and the envp[]. If the arguments look
1570 * like non-aligned, assume that they are 'strictly' or
1571 * 'traditionally' contiguous. If the arguments look like
1572 * aligned, we just check that they are within aligned
1573 * PTRSIZE bytes. As long as no system has something bizarre
1574 * like the argv[] interleaved with some other data, we are
1575 * fine. (Did I just evoke Murphy's Law?) --jhi */
1576 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1578 for (i = 1; i < PL_origargc; i++) {
1579 if ((PL_origargv[i] == s + 1
1581 || PL_origargv[i] == s + 2
1586 (PL_origargv[i] > s &&
1588 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1599 #ifndef PERL_USE_SAFE_PUTENV
1600 /* Can we grab env area too to be used as the area for $0? */
1601 if (s && PL_origenviron && !PL_use_safe_putenv) {
1602 if ((PL_origenviron[0] == s + 1)
1605 (PL_origenviron[0] > s &&
1606 PL_origenviron[0] <=
1607 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1610 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1611 s = PL_origenviron[0];
1614 my_setenv("NoNe SuCh", NULL);
1615 /* Force copy of environment. */
1616 for (i = 1; PL_origenviron[i]; i++) {
1617 if (PL_origenviron[i] == s + 1
1620 (PL_origenviron[i] > s &&
1621 PL_origenviron[i] <=
1622 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1625 s = PL_origenviron[i];
1633 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1635 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1640 /* Come here if running an undumped a.out. */
1642 PL_origfilename = savepv(argv[0]);
1643 PL_do_undump = FALSE;
1644 cxstack_ix = -1; /* start label stack again */
1646 assert (!PL_tainted);
1648 S_set_caret_X(aTHX);
1650 init_postdump_symbols(argc,argv,env);
1655 op_free(PL_main_root);
1656 PL_main_root = NULL;
1658 PL_main_start = NULL;
1659 SvREFCNT_dec(PL_main_cv);
1663 oldscope = PL_scopestack_ix;
1664 PL_dowarn = G_WARN_OFF;
1669 parse_body(env,xsinit);
1671 call_list(oldscope, PL_unitcheckav);
1673 call_list(oldscope, PL_checkav);
1680 /* my_exit() was called */
1681 while (PL_scopestack_ix > oldscope)
1684 PL_curstash = PL_defstash;
1686 call_list(oldscope, PL_unitcheckav);
1688 call_list(oldscope, PL_checkav);
1692 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1701 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1705 int argc = PL_origargc;
1706 char **argv = PL_origargv;
1707 const char *scriptname = NULL;
1708 VOL bool dosearch = FALSE;
1710 const char *validarg = "";
1714 const char *cddir = NULL;
1715 #ifdef USE_SITECUSTOMIZE
1716 bool minus_f = FALSE;
1718 SV *linestr_sv = newSV_type(SVt_PVIV);
1719 bool add_read_e_script = FALSE;
1721 SvGROW(linestr_sv, 80);
1722 sv_setpvn(linestr_sv,"",0);
1724 sv = newSVpvs(""); /* first used for -I flags */
1730 for (argc--,argv++; argc > 0; argc--,argv++) {
1731 if (argv[0][0] != '-' || !argv[0][1])
1735 validarg = " PHOOEY ";
1739 * Can we rely on the kernel to start scripts with argv[1] set to
1740 * contain all #! line switches (the whole line)? (argv[0] is set to
1741 * the interpreter name, argv[2] to the script name; argv[3] and
1742 * above may contain other arguments.)
1749 #ifndef PERL_STRICT_CR
1773 if ((s = moreswitches(s)))
1778 CHECK_MALLOC_TOO_LATE_FOR('t');
1779 if( !PL_tainting ) {
1780 PL_taint_warn = TRUE;
1786 CHECK_MALLOC_TOO_LATE_FOR('T');
1788 PL_taint_warn = FALSE;
1796 #ifdef MACOS_TRADITIONAL
1797 /* ignore -e for Dev:Pseudo argument */
1798 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1801 forbid_setid('e', FALSE);
1803 PL_e_script = newSVpvs("");
1804 add_read_e_script = TRUE;
1807 sv_catpv(PL_e_script, s);
1809 sv_catpv(PL_e_script, argv[1]);
1813 Perl_croak(aTHX_ "No code specified for -%c", c);
1814 sv_catpvs(PL_e_script, "\n");
1818 #ifdef USE_SITECUSTOMIZE
1824 case 'I': /* -I handled both here and in moreswitches() */
1825 forbid_setid('I', FALSE);
1826 if (!*++s && (s=argv[1]) != NULL) {
1830 STRLEN len = strlen(s);
1831 const char * const p = savepvn(s, len);
1832 incpush(p, TRUE, TRUE, FALSE, FALSE);
1833 sv_catpvs(sv, "-I");
1834 sv_catpvn(sv, p, len);
1839 Perl_croak(aTHX_ "No directory specified for -I");
1842 forbid_setid('S', FALSE);
1850 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1852 /* Can't do newSVpvs() as that would involve pre-processor
1853 condititionals inside a macro expansion. */
1854 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1861 # ifdef PERL_DONT_CREATE_GVSV
1862 " PERL_DONT_CREATE_GVSV"
1864 # ifdef PERL_MALLOC_WRAP
1867 # ifdef PERL_MEM_LOG
1870 # ifdef PERL_MEM_LOG_ENV
1873 # ifdef PERL_MEM_LOG_ENV_FD
1874 " PERL_MEM_LOG_ENV_FD"
1876 # ifdef PERL_MEM_LOG_STDERR
1877 " PERL_MEM_LOG_STDERR"
1879 # ifdef PERL_MEM_LOG_TIMESTAMP
1880 " PERL_MEM_LOG_TIMESTAMP"
1882 # ifdef PERL_USE_SAFE_PUTENV
1883 " PERL_USE_SAFE_PUTENV"
1885 # ifdef USE_SITECUSTOMIZE
1886 " USE_SITECUSTOMIZE"
1890 sv_catpv(opts_prog, PL_bincompat_options);
1891 /* Terminate the qw(, and then wrap at 76 columns. */
1892 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1894 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1896 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1899 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1901 #if defined(LOCAL_PATCH_COUNT)
1902 if (LOCAL_PATCH_COUNT > 0) {
1904 sv_catpvs(opts_prog,
1905 "\" Locally applied patches:\\n\",");
1906 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1907 if (PL_localpatches[i])
1908 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1909 0, PL_localpatches[i], 0);
1913 Perl_sv_catpvf(aTHX_ opts_prog,
1914 "\" Built under %s\\n",OSNAME);
1917 sv_catpvs(opts_prog,
1918 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1920 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1923 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1924 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1925 "sort grep {/^PERL/} keys %ENV; ");
1927 sv_catpvs(opts_prog,
1928 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1930 sv_catpvs(opts_prog,
1931 "print \" \\%ENV:\\n @env\\n\" if @env;"
1932 "print \" \\@INC:\\n @INC\\n\";");
1936 opts_prog = Perl_newSVpvf(aTHX_
1937 "Config::config_vars(qw%c%s%c)",
1941 av_push(PL_preambleav, opts_prog);
1942 /* don't look for script or read stdin */
1943 scriptname = BIT_BUCKET;
1947 PL_doextract = TRUE;
1955 if (!*++s || isSPACE(*s)) {
1959 /* catch use of gnu style long options */
1960 if (strEQ(s, "version")) {
1964 if (strEQ(s, "help")) {
1971 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1982 #ifndef SECURE_INTERNAL_GETENV
1985 (s = PerlEnv_getenv("PERL5OPT")))
1987 const char *popt = s;
1990 if (*s == '-' && *(s+1) == 'T') {
1991 CHECK_MALLOC_TOO_LATE_FOR('T');
1993 PL_taint_warn = FALSE;
1996 char *popt_copy = NULL;
2009 if (!strchr("CDIMUdmtw", *s))
2010 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2014 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2015 s = popt_copy + (s - popt);
2016 d = popt_copy + (d - popt);
2023 if( !PL_tainting ) {
2024 PL_taint_warn = TRUE;
2035 #ifdef USE_SITECUSTOMIZE
2037 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2038 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2043 scriptname = argv[0];
2046 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2048 else if (scriptname == NULL) {
2050 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2056 /* Set $^X early so that it can be used for relocatable paths in @INC */
2057 assert (!PL_tainted);
2059 S_set_caret_X(aTHX);
2064 bool suidscript = FALSE;
2067 const int fdscript =
2069 open_script(scriptname, dosearch, &suidscript, &rsfp);
2071 validate_suid(validarg, scriptname, fdscript, suidscript,
2075 # if defined(SIGCHLD) || defined(SIGCLD)
2078 # define SIGCHLD SIGCLD
2080 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2081 if (sigstate == (Sighandler_t) SIG_IGN) {
2082 if (ckWARN(WARN_SIGNAL))
2083 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2084 "Can't ignore signal CHLD, forcing to default");
2085 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2092 #ifdef MACOS_TRADITIONAL
2093 || gMacPerl_AlwaysExtract
2097 /* This will croak if suidscript is true, as -x cannot be used with
2099 forbid_setid('x', suidscript);
2100 /* Hence you can't get here if suidscript is true */
2102 find_beginning(linestr_sv, rsfp);
2103 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2104 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2108 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2109 CvUNIQUE_on(PL_compcv);
2111 CvPADLIST(PL_compcv) = pad_new(0);
2113 PL_isarev = newHV();
2116 boot_core_UNIVERSAL();
2117 boot_core_xsutils();
2121 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2123 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2129 # ifdef HAS_SOCKS5_INIT
2130 socks5_init(argv[0]);
2136 init_predump_symbols();
2137 /* init_postdump_symbols not currently designed to be called */
2138 /* more than once (ENV isn't cleared first, for example) */
2139 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2141 init_postdump_symbols(argc,argv,env);
2143 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2144 * or explicitly in some platforms.
2145 * locale.c:Perl_init_i18nl10n() if the environment
2146 * look like the user wants to use UTF-8. */
2147 #if defined(__SYMBIAN32__)
2148 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2151 /* Requires init_predump_symbols(). */
2152 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2157 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2158 * and the default open disciplines. */
2159 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2160 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2162 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2163 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2164 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2166 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2167 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2168 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2170 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2171 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2172 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2174 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2175 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2178 sv_setpvn(sv, ":utf8\0:utf8", 11);
2180 sv_setpvn(sv, ":utf8\0", 6);
2183 sv_setpvn(sv, "\0:utf8", 6);
2191 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2192 if (strEQ(s, "unsafe"))
2193 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2194 else if (strEQ(s, "safe"))
2195 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2197 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2204 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2208 PL_xmlfp = PerlIO_stdout();
2210 PL_xmlfp = PerlIO_open(s, "w");
2212 Perl_croak(aTHX_ "Can't open %s", s);
2214 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2220 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2221 PL_madskills = atoi(s);
2222 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2227 lex_start(linestr_sv, rsfp, TRUE);
2228 PL_subname = newSVpvs("main");
2230 if (add_read_e_script)
2231 filter_add(read_e_script, NULL);
2233 /* now parse the script */
2235 SETERRNO(0,SS_NORMAL);
2236 #ifdef MACOS_TRADITIONAL
2237 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2239 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2241 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2242 MacPerl_MPWFileName(PL_origfilename));
2246 if (yyparse() || PL_parser->error_count) {
2248 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2250 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2255 CopLINE_set(PL_curcop, 0);
2256 PL_curstash = PL_defstash;
2258 SvREFCNT_dec(PL_e_script);
2266 SAVECOPFILE(PL_curcop);
2267 SAVECOPLINE(PL_curcop);
2268 gv_check(PL_defstash);
2277 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2278 dump_mstats("after compilation:");
2288 =for apidoc perl_run
2290 Tells a Perl interpreter to run. See L<perlembed>.
2303 PERL_ARGS_ASSERT_PERL_RUN;
2304 #ifndef MULTIPLICITY
2305 PERL_UNUSED_ARG(my_perl);
2308 oldscope = PL_scopestack_ix;
2316 cxstack_ix = -1; /* start context stack again */
2318 case 0: /* normal completion */
2322 case 2: /* my_exit() */
2323 while (PL_scopestack_ix > oldscope)
2326 PL_curstash = PL_defstash;
2327 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2328 PL_endav && !PL_minus_c)
2329 call_list(oldscope, PL_endav);
2331 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2332 dump_mstats("after execution: ");
2338 POPSTACK_TO(PL_mainstack);
2341 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2352 S_run_body(pTHX_ I32 oldscope)
2355 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2356 PL_sawampersand ? "Enabling" : "Omitting"));
2358 if (!PL_restartop) {
2362 exit(0); /* less likely to core dump than my_exit(0) */
2365 DEBUG_x(dump_all());
2368 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2372 #ifdef MACOS_TRADITIONAL
2373 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2374 (gMacPerl_ErrorFormat ? "# " : ""),
2375 MacPerl_MPWFileName(PL_origfilename));
2377 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2381 if (PERLDB_SINGLE && PL_DBsingle)
2382 sv_setiv(PL_DBsingle, 1);
2384 call_list(oldscope, PL_initav);
2385 #ifdef PERL_DEBUG_READONLY_OPS
2386 Perl_pending_Slabs_to_ro(aTHX);
2393 PL_op = PL_restartop;
2397 else if (PL_main_start) {
2398 CvDEPTH(PL_main_cv) = 1;
2399 PL_op = PL_main_start;
2407 =head1 SV Manipulation Functions
2409 =for apidoc p||get_sv
2411 Returns the SV of the specified Perl scalar. If C<create> is set and the
2412 Perl variable does not exist then it will be created. If C<create> is not
2413 set and the variable does not exist then NULL is returned.
2419 Perl_get_sv(pTHX_ const char *name, I32 create)
2423 PERL_ARGS_ASSERT_GET_SV;
2425 gv = gv_fetchpv(name, create, SVt_PV);
2432 =head1 Array Manipulation Functions
2434 =for apidoc p||get_av
2436 Returns the AV of the specified Perl array. If C<create> is set and the
2437 Perl variable does not exist then it will be created. If C<create> is not
2438 set and the variable does not exist then NULL is returned.
2444 Perl_get_av(pTHX_ const char *name, I32 create)
2446 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2448 PERL_ARGS_ASSERT_GET_AV;
2458 =head1 Hash Manipulation Functions
2460 =for apidoc p||get_hv
2462 Returns the HV of the specified Perl hash. If C<create> is set and the
2463 Perl variable does not exist then it will be created. If C<create> is not
2464 set and the variable does not exist then NULL is returned.
2470 Perl_get_hv(pTHX_ const char *name, I32 create)
2472 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2474 PERL_ARGS_ASSERT_GET_HV;
2484 =head1 CV Manipulation Functions
2486 =for apidoc p||get_cvn_flags
2488 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2489 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2490 exist then it will be declared (which has the same effect as saying
2491 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2492 then NULL is returned.
2494 =for apidoc p||get_cv
2496 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2502 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2504 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2505 /* XXX this is probably not what they think they're getting.
2506 * It has the same effect as "sub name;", i.e. just a forward
2509 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2511 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2512 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2513 return newSUB(start_subparse(FALSE, 0),
2514 newSVOP(OP_CONST, 0, sv),
2523 Perl_get_cv(pTHX_ const char *name, I32 flags)
2525 PERL_ARGS_ASSERT_GET_CV;
2527 return get_cvn_flags(name, strlen(name), flags);
2530 /* Be sure to refetch the stack pointer after calling these routines. */
2534 =head1 Callback Functions
2536 =for apidoc p||call_argv
2538 Performs a callback to the specified Perl sub. See L<perlcall>.
2544 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2546 /* See G_* flags in cop.h */
2547 /* null terminated arg list */
2552 PERL_ARGS_ASSERT_CALL_ARGV;
2557 mXPUSHs(newSVpv(*argv,0));
2562 return call_pv(sub_name, flags);
2566 =for apidoc p||call_pv
2568 Performs a callback to the specified Perl sub. See L<perlcall>.
2574 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2575 /* name of the subroutine */
2576 /* See G_* flags in cop.h */
2578 PERL_ARGS_ASSERT_CALL_PV;
2580 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2584 =for apidoc p||call_method
2586 Performs a callback to the specified Perl method. The blessed object must
2587 be on the stack. See L<perlcall>.
2593 Perl_call_method(pTHX_ const char *methname, I32 flags)
2594 /* name of the subroutine */
2595 /* See G_* flags in cop.h */
2597 PERL_ARGS_ASSERT_CALL_METHOD;
2599 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2602 /* May be called with any of a CV, a GV, or an SV containing the name. */
2604 =for apidoc p||call_sv
2606 Performs a callback to the Perl sub whose name is in the SV. See
2613 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2614 /* See G_* flags in cop.h */
2617 LOGOP myop; /* fake syntax tree node */
2622 bool oldcatch = CATCH_GET;
2624 OP* const oldop = PL_op;
2627 PERL_ARGS_ASSERT_CALL_SV;
2629 if (flags & G_DISCARD) {
2633 if (!(flags & G_WANT)) {
2634 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2639 Zero(&myop, 1, LOGOP);
2640 myop.op_next = NULL;
2641 if (!(flags & G_NOARGS))
2642 myop.op_flags |= OPf_STACKED;
2643 myop.op_flags |= OP_GIMME_REVERSE(flags);
2647 EXTEND(PL_stack_sp, 1);
2648 *++PL_stack_sp = sv;
2650 oldscope = PL_scopestack_ix;
2652 if (PERLDB_SUB && PL_curstash != PL_debstash
2653 /* Handle first BEGIN of -d. */
2654 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2655 /* Try harder, since this may have been a sighandler, thus
2656 * curstash may be meaningless. */
2657 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2658 && !(flags & G_NODEBUG))
2659 PL_op->op_private |= OPpENTERSUB_DB;
2661 if (flags & G_METHOD) {
2662 Zero(&method_op, 1, UNOP);
2663 method_op.op_next = PL_op;
2664 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2665 method_op.op_type = OP_METHOD;
2666 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2667 myop.op_type = OP_ENTERSUB;
2668 PL_op = (OP*)&method_op;
2671 if (!(flags & G_EVAL)) {
2673 CALL_BODY_SUB((OP*)&myop);
2674 retval = PL_stack_sp - (PL_stack_base + oldmark);
2675 CATCH_SET(oldcatch);
2678 myop.op_other = (OP*)&myop;
2680 create_eval_scope(flags|G_FAKINGEVAL);
2688 CALL_BODY_SUB((OP*)&myop);
2689 retval = PL_stack_sp - (PL_stack_base + oldmark);
2690 if (!(flags & G_KEEPERR))
2691 sv_setpvn(ERRSV,"",0);
2697 /* my_exit() was called */
2698 PL_curstash = PL_defstash;
2701 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2702 Perl_croak(aTHX_ "Callback called exit");
2707 PL_op = PL_restartop;
2711 PL_stack_sp = PL_stack_base + oldmark;
2712 if ((flags & G_WANT) == G_ARRAY)
2716 *++PL_stack_sp = &PL_sv_undef;
2721 if (PL_scopestack_ix > oldscope)
2722 delete_eval_scope();
2726 if (flags & G_DISCARD) {
2727 PL_stack_sp = PL_stack_base + oldmark;
2736 /* Eval a string. The G_EVAL flag is always assumed. */
2739 =for apidoc p||eval_sv
2741 Tells Perl to C<eval> the string in the SV.
2747 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2749 /* See G_* flags in cop.h */
2753 UNOP myop; /* fake syntax tree node */
2754 VOL I32 oldmark = SP - PL_stack_base;
2757 OP* const oldop = PL_op;
2760 PERL_ARGS_ASSERT_EVAL_SV;
2762 if (flags & G_DISCARD) {
2769 Zero(PL_op, 1, UNOP);
2770 EXTEND(PL_stack_sp, 1);
2771 *++PL_stack_sp = sv;
2773 if (!(flags & G_NOARGS))
2774 myop.op_flags = OPf_STACKED;
2775 myop.op_next = NULL;
2776 myop.op_type = OP_ENTEREVAL;
2777 myop.op_flags |= OP_GIMME_REVERSE(flags);
2778 if (flags & G_KEEPERR)
2779 myop.op_flags |= OPf_SPECIAL;
2781 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2782 * before a PUSHEVAL, which corrupts the stack after a croak */
2783 TAINT_PROPER("eval_sv()");
2789 CALL_BODY_EVAL((OP*)&myop);
2790 retval = PL_stack_sp - (PL_stack_base + oldmark);
2791 if (!(flags & G_KEEPERR))
2792 sv_setpvn(ERRSV,"",0);
2798 /* my_exit() was called */
2799 PL_curstash = PL_defstash;
2802 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2803 Perl_croak(aTHX_ "Callback called exit");
2808 PL_op = PL_restartop;
2812 PL_stack_sp = PL_stack_base + oldmark;
2813 if ((flags & G_WANT) == G_ARRAY)
2817 *++PL_stack_sp = &PL_sv_undef;
2823 if (flags & G_DISCARD) {
2824 PL_stack_sp = PL_stack_base + oldmark;
2834 =for apidoc p||eval_pv
2836 Tells Perl to C<eval> the given string and return an SV* result.
2842 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2846 SV* sv = newSVpv(p, 0);
2848 PERL_ARGS_ASSERT_EVAL_PV;
2850 eval_sv(sv, G_SCALAR);
2857 if (croak_on_error && SvTRUE(ERRSV)) {
2858 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2864 /* Require a module. */
2867 =head1 Embedding Functions
2869 =for apidoc p||require_pv
2871 Tells Perl to C<require> the file named by the string argument. It is
2872 analogous to the Perl code C<eval "require '$file'">. It's even
2873 implemented that way; consider using load_module instead.
2878 Perl_require_pv(pTHX_ const char *pv)
2884 PERL_ARGS_ASSERT_REQUIRE_PV;
2886 PUSHSTACKi(PERLSI_REQUIRE);
2888 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2889 eval_sv(sv_2mortal(sv), G_DISCARD);
2895 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2897 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2899 PERL_ARGS_ASSERT_MAGICNAME;
2902 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2906 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2908 /* This message really ought to be max 23 lines.
2909 * Removed -h because the user already knows that option. Others? */
2911 static const char * const usage_msg[] = {
2912 "-0[octal] specify record separator (\\0, if no argument)",
2913 "-a autosplit mode with -n or -p (splits $_ into @F)",
2914 "-C[number/list] enables the listed Unicode features",
2915 "-c check syntax only (runs BEGIN and CHECK blocks)",
2916 "-d[:debugger] run program under debugger",
2917 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2918 "-e program one line of program (several -e's allowed, omit programfile)",
2919 "-E program like -e, but enables all optional features",
2920 "-f don't do $sitelib/sitecustomize.pl at startup",
2921 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2922 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2923 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2924 "-l[octal] enable line ending processing, specifies line terminator",
2925 "-[mM][-]module execute \"use/no module...\" before executing program",
2926 "-n assume \"while (<>) { ... }\" loop around program",
2927 "-p assume loop like -n but print line also, like sed",
2928 "-s enable rudimentary parsing for switches after programfile",
2929 "-S look for programfile using PATH environment variable",
2930 "-t enable tainting warnings",
2931 "-T enable tainting checks",
2932 "-u dump core after parsing program",
2933 "-U allow unsafe operations",
2934 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2935 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2936 "-w enable many useful warnings (RECOMMENDED)",
2937 "-W enable all warnings",
2938 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2939 "-X disable all warnings",
2943 const char * const *p = usage_msg;
2945 PERL_ARGS_ASSERT_USAGE;
2947 PerlIO_printf(PerlIO_stdout(),
2948 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2951 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2954 /* convert a string of -D options (or digits) into an int.
2955 * sets *s to point to the char after the options */
2959 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2961 static const char * const usage_msgd[] = {
2962 " Debugging flag values: (see also -d)",
2963 " p Tokenizing and parsing (with v, displays parse stack)",
2964 " s Stack snapshots (with v, displays all stacks)",
2965 " l Context (loop) stack processing",
2966 " t Trace execution",
2967 " o Method and overloading resolution",
2968 " c String/numeric conversions",
2969 " P Print profiling info, source file input state",
2970 " m Memory allocation",
2971 " f Format processing",
2972 " r Regular expression parsing and execution",
2973 " x Syntax tree dump",
2974 " u Tainting checks",
2975 " H Hash dump -- usurps values()",
2976 " X Scratchpad allocation",
2979 " R Include reference counts of dumped variables (eg when using -Ds)",
2980 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2981 " v Verbose: use in conjunction with other flags",
2983 " A Consistency checks on internal structures",
2984 " q quiet - currently only suppresses the 'EXECUTING' message",
2989 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2992 /* if adding extra options, remember to update DEBUG_MASK */
2993 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2995 for (; isALNUM(**s); (*s)++) {
2996 const char * const d = strchr(debopts,**s);
2998 i |= 1 << (d - debopts);
2999 else if (ckWARN_d(WARN_DEBUGGING))
3000 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3001 "invalid option -D%c, use -D'' to see choices\n", **s);
3004 else if (isDIGIT(**s)) {
3006 for (; isALNUM(**s); (*s)++) ;
3008 else if (givehelp) {
3009 const char *const *p = usage_msgd;
3010 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3013 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3014 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3015 "-Dp not implemented on this platform\n");
3021 /* This routine handles any switches that can be given during run */
3024 Perl_moreswitches(pTHX_ const char *s)
3028 const char option = *s; /* used to remember option in -m/-M code */
3030 PERL_ARGS_ASSERT_MORESWITCHES;
3038 SvREFCNT_dec(PL_rs);
3039 if (s[1] == 'x' && s[2]) {
3040 const char *e = s+=2;
3046 flags = PERL_SCAN_SILENT_ILLDIGIT;
3047 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3048 if (s + numlen < e) {
3049 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3053 PL_rs = newSVpvs("");
3054 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3055 tmps = (U8*)SvPVX(PL_rs);
3056 uvchr_to_utf8(tmps, rschar);
3057 SvCUR_set(PL_rs, UNISKIP(rschar));
3062 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3063 if (rschar & ~((U8)~0))
3064 PL_rs = &PL_sv_undef;
3065 else if (!rschar && numlen >= 2)
3066 PL_rs = newSVpvs("");
3068 char ch = (char)rschar;
3069 PL_rs = newSVpvn(&ch, 1);
3072 sv_setsv(get_sv("/", TRUE), PL_rs);
3077 PL_unicode = parse_unicode_opts( (const char **)&s );
3078 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3084 while (*s && !isSPACE(*s)) ++s;
3085 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3096 forbid_setid('d', FALSE);
3099 /* -dt indicates to the debugger that threads will be used */
3100 if (*s == 't' && !isALNUM(s[1])) {
3102 my_setenv("PERL5DB_THREADED", "1");
3105 /* The following permits -d:Mod to accepts arguments following an =
3106 in the fashion that -MSome::Mod does. */
3107 if (*s == ':' || *s == '=') {
3108 const char *start = ++s;
3109 const char *const end = s + strlen(s);
3110 SV * const sv = newSVpvs("use Devel::");
3112 /* We now allow -d:Module=Foo,Bar */
3113 while(isALNUM(*s) || *s==':') ++s;
3115 sv_catpvn(sv, start, end - start);
3117 sv_catpvn(sv, start, s-start);
3118 /* Don't use NUL as q// delimiter here, this string goes in the
3120 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3123 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3127 PL_perldb = PERLDB_ALL;
3134 forbid_setid('D', FALSE);
3136 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3137 #else /* !DEBUGGING */
3138 if (ckWARN_d(WARN_DEBUGGING))
3139 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3140 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3141 for (s++; isALNUM(*s); s++) ;
3146 usage(PL_origargv[0]);
3149 Safefree(PL_inplace);
3150 #if defined(__CYGWIN__) /* do backup extension automagically */
3151 if (*(s+1) == '\0') {
3152 PL_inplace = savepvs(".bak");
3155 #endif /* __CYGWIN__ */
3157 const char * const start = ++s;
3158 while (*s && !isSPACE(*s))
3161 PL_inplace = savepvn(start, s - start);
3165 if (*s == '-') /* Additional switches on #! line. */
3169 case 'I': /* -I handled both here and in parse_body() */
3170 forbid_setid('I', FALSE);
3172 while (*s && isSPACE(*s))
3177 /* ignore trailing spaces (possibly followed by other switches) */
3179 for (e = p; *e && !isSPACE(*e); e++) ;
3183 } while (*p && *p != '-');
3184 e = savepvn(s, e-s);
3185 incpush(e, TRUE, TRUE, FALSE, FALSE);
3192 Perl_croak(aTHX_ "No directory specified for -I");
3198 SvREFCNT_dec(PL_ors_sv);
3204 PL_ors_sv = newSVpvs("\n");
3205 numlen = 3 + (*s == '0');
3206 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3210 if (RsPARA(PL_rs)) {
3211 PL_ors_sv = newSVpvs("\n\n");
3214 PL_ors_sv = newSVsv(PL_rs);
3219 forbid_setid('M', FALSE); /* XXX ? */
3222 forbid_setid('m', FALSE); /* XXX ? */
3227 const char *use = "use ";
3229 /* -M-foo == 'no foo' */
3230 /* Leading space on " no " is deliberate, to make both
3231 possibilities the same length. */
3232 if (*s == '-') { use = " no "; ++s; }
3233 sv = newSVpvn(use,4);
3235 /* We allow -M'Module qw(Foo Bar)' */
3236 while(isALNUM(*s) || *s==':') {
3245 Perl_croak(aTHX_ "Module name required with -%c option",
3248 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3249 "contains single ':'",
3250 s - start, start, option);
3251 end = s + strlen(s);
3253 sv_catpvn(sv, start, end - start);
3254 if (option == 'm') {
3256 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3257 sv_catpvs( sv, " ()");
3260 sv_catpvn(sv, start, s-start);
3261 /* Use NUL as q''-delimiter. */
3262 sv_catpvs(sv, " split(/,/,q\0");
3264 sv_catpvn(sv, s, end - s);
3265 sv_catpvs(sv, "\0)");
3268 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3271 Perl_croak(aTHX_ "Missing argument to -%c", option);
3282 forbid_setid('s', FALSE);
3283 PL_doswitches = TRUE;
3297 #ifdef MACOS_TRADITIONAL
3298 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3300 PL_do_undump = TRUE;
3308 if (!sv_derived_from(PL_patchlevel, "version"))
3309 upg_version(PL_patchlevel, TRUE);
3311 PerlIO_printf(PerlIO_stdout(),
3312 Perl_form(aTHX_ "\nThis is perl, %"SVf
3313 #ifdef PERL_PATCHNUM
3314 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3317 SVfARG(vstringify(PL_patchlevel)),
3320 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3321 PerlIO_printf(PerlIO_stdout(),
3322 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3323 SVfARG(vstringify(PL_patchlevel))));
3324 PerlIO_printf(PerlIO_stdout(),
3325 Perl_form(aTHX_ " built under %s at %s %s\n",
3326 OSNAME, __DATE__, __TIME__));
3327 PerlIO_printf(PerlIO_stdout(),
3328 Perl_form(aTHX_ " OS Specific Release: %s\n",
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 1987-2007, 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 ;
3440 if (s[1] == '-') /* Additional switches on #! line. */
3445 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3451 #ifdef ALTERNATE_SHEBANG
3452 case 'S': /* OS/2 needs -S on "extproc" line. */
3456 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3461 /* compliments of Tom Christiansen */
3463 /* unexec() can be found in the Gnu emacs distribution */
3464 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3467 Perl_my_unexec(pTHX)
3469 PERL_UNUSED_CONTEXT;
3471 SV * prog = newSVpv(BIN_EXP, 0);
3472 SV * file = newSVpv(PL_origfilename, 0);
3476 sv_catpvs(prog, "/perl");
3477 sv_catpvs(file, ".perldump");
3479 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3480 /* unexec prints msg to stderr in case of failure */
3481 PerlProc_exit(status);
3484 # include <lib$routines.h>
3485 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3486 # elif defined(WIN32) || defined(__CYGWIN__)
3487 Perl_croak(aTHX_ "dump is not supported");
3489 ABORT(); /* for use with undump */
3494 /* initialize curinterp */
3500 # define PERLVAR(var,type)
3501 # define PERLVARA(var,n,type)
3502 # if defined(PERL_IMPLICIT_CONTEXT)
3503 # define PERLVARI(var,type,init) aTHX->var = init;
3504 # define PERLVARIC(var,type,init) aTHX->var = init;
3506 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3507 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3509 # include "intrpvar.h"
3515 # define PERLVAR(var,type)
3516 # define PERLVARA(var,n,type)
3517 # define PERLVARI(var,type,init) PL_##var = init;
3518 # define PERLVARIC(var,type,init) PL_##var = init;
3519 # include "intrpvar.h"
3526 /* As these are inside a structure, PERLVARI isn't capable of initialising
3528 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3529 PL_reg_poscache = PL_reg_starttry = NULL;
3533 S_init_main_stash(pTHX)
3538 PL_curstash = PL_defstash = newHV();
3539 /* We know that the string "main" will be in the global shared string
3540 table, so it's a small saving to use it rather than allocate another
3542 PL_curstname = newSVpvs_share("main");
3543 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3544 /* If we hadn't caused another reference to "main" to be in the shared
3545 string table above, then it would be worth reordering these two,
3546 because otherwise all we do is delete "main" from it as a consequence
3547 of the SvREFCNT_dec, only to add it again with hv_name_set */
3548 SvREFCNT_dec(GvHV(gv));
3549 hv_name_set(PL_defstash, "main", 4, 0);
3550 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3552 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3554 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3555 GvMULTI_on(PL_incgv);
3556 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3557 GvMULTI_on(PL_hintgv);
3558 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3559 SvREFCNT_inc_simple_void(PL_defgv);
3560 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3561 SvREFCNT_inc_simple_void(PL_errgv);
3562 GvMULTI_on(PL_errgv);
3563 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3564 GvMULTI_on(PL_replgv);
3565 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3566 #ifdef PERL_DONT_CREATE_GVSV
3569 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3570 sv_setpvn(ERRSV, "", 0);
3571 PL_curstash = PL_defstash;
3572 CopSTASH_set(&PL_compiling, PL_defstash);
3573 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3574 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3576 /* We must init $/ before switches are processed. */
3577 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3581 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3582 bool *suidscript, PerlIO **rsfpp)
3587 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3590 PL_origfilename = savepvs("-e");
3593 /* if find_script() returns, it returns a malloc()-ed value */
3594 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3596 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3597 const char *s = scriptname + 8;
3603 * Tell apart "normal" usage of fdscript, e.g.
3604 * with bash on FreeBSD:
3605 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3606 * from usage in suidperl.
3607 * Does any "normal" usage leave garbage after the number???
3608 * Is it a mistake to use a similar /dev/fd/ construct for
3613 * Be supersafe and do some sanity-checks.
3614 * Still, can we be sure we got the right thing?
3617 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3620 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3622 scriptname = savepv(s + 1);
3623 Safefree(PL_origfilename);
3624 PL_origfilename = (char *)scriptname;
3629 CopFILE_free(PL_curcop);
3630 CopFILE_set(PL_curcop, PL_origfilename);
3631 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3632 scriptname = (char *)"";
3633 if (fdscript >= 0) {
3634 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3635 # if defined(HAS_FCNTL) && defined(F_SETFD)
3637 /* ensure close-on-exec */
3638 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3643 Perl_croak(aTHX_ "sperl needs fd script\n"
3644 "You should not call sperl directly; do you need to "
3645 "change a #! line\nfrom sperl to perl?\n");
3648 * Do not open (or do other fancy stuff) while setuid.
3649 * Perl does the open, and hands script to suidperl on a fd;
3650 * suidperl only does some checks, sets up UIDs and re-execs
3651 * perl with that fd as it has always done.
3655 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3658 else if (!*scriptname) {
3659 forbid_setid(0, *suidscript);
3660 *rsfpp = PerlIO_stdin();
3663 #ifdef FAKE_BIT_BUCKET
3664 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3665 * is called) and still have the "-e" work. (Believe it or not,
3666 * a /dev/null is required for the "-e" to work because source
3667 * filter magic is used to implement it. ) This is *not* a general
3668 * replacement for a /dev/null. What we do here is create a temp
3669 * file (an empty file), open up that as the script, and then
3670 * immediately close and unlink it. Close enough for jazz. */
3671 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3672 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3673 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3674 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3675 FAKE_BIT_BUCKET_TEMPLATE
3677 const char * const err = "Failed to create a fake bit bucket";
3678 if (strEQ(scriptname, BIT_BUCKET)) {
3679 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3680 int tmpfd = mkstemp(tmpname);
3682 scriptname = tmpname;
3685 Perl_croak(aTHX_ err);
3688 scriptname = mktemp(tmpname);
3690 Perl_croak(aTHX_ err);
3695 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3696 #ifdef FAKE_BIT_BUCKET
3697 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3698 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3699 && strlen(scriptname) == sizeof(tmpname) - 1) {
3702 scriptname = BIT_BUCKET;
3704 # if defined(HAS_FCNTL) && defined(F_SETFD)
3706 /* ensure close-on-exec */
3707 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3710 #endif /* IAMSUID */
3712 /* PSz 16 Sep 03 Keep neat error message */
3714 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3716 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3717 CopFILE(PL_curcop), Strerror(errno));
3723 * I_SYSSTATVFS HAS_FSTATVFS
3725 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3726 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3727 * here so that metaconfig picks them up. */
3731 S_fd_on_nosuid_fs(pTHX_ int fd)
3734 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3735 * but is needed also on machines without setreuid.
3736 * Seems safe enough to run as root.
3738 int check_okay = 0; /* able to do all the required sys/libcalls */
3739 int on_nosuid = 0; /* the fd is on a nosuid fs */
3741 * Need to check noexec also: nosuid might not be set, the average
3742 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3744 int on_noexec = 0; /* the fd is on a noexec fs */
3747 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3748 * fstatvfs() is UNIX98.
3749 * fstatfs() is 4.3 BSD.
3750 * ustat()+getmnt() is pre-4.3 BSD.
3751 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3752 * an irrelevant filesystem while trying to reach the right one.
3755 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3757 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3758 defined(HAS_FSTATVFS)
3759 # define FD_ON_NOSUID_CHECK_OKAY
3760 struct statvfs stfs;
3762 check_okay = fstatvfs(fd, &stfs) == 0;
3763 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3765 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3766 on platforms where it is present. */
3767 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3769 # endif /* fstatvfs */
3771 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3772 defined(PERL_MOUNT_NOSUID) && \
3773 defined(PERL_MOUNT_NOEXEC) && \
3774 defined(HAS_FSTATFS) && \
3775 defined(HAS_STRUCT_STATFS) && \
3776 defined(HAS_STRUCT_STATFS_F_FLAGS)
3777 # define FD_ON_NOSUID_CHECK_OKAY
3780 check_okay = fstatfs(fd, &stfs) == 0;
3781 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3782 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3783 # endif /* fstatfs */
3785 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3786 defined(PERL_MOUNT_NOSUID) && \
3787 defined(PERL_MOUNT_NOEXEC) && \
3788 defined(HAS_FSTAT) && \
3789 defined(HAS_USTAT) && \
3790 defined(HAS_GETMNT) && \
3791 defined(HAS_STRUCT_FS_DATA) && \
3793 # define FD_ON_NOSUID_CHECK_OKAY
3796 if (fstat(fd, &fdst) == 0) {
3798 if (ustat(fdst.st_dev, &us) == 0) {
3800 /* NOSTAT_ONE here because we're not examining fields which
3801 * vary between that case and STAT_ONE. */
3802 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3803 size_t cmplen = sizeof(us.f_fname);
3804 if (sizeof(fsd.fd_req.path) < cmplen)
3805 cmplen = sizeof(fsd.fd_req.path);
3806 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3807 fdst.st_dev == fsd.fd_req.dev) {
3809 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3810 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3815 # endif /* fstat+ustat+getmnt */
3817 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3818 defined(HAS_GETMNTENT) && \
3819 defined(HAS_HASMNTOPT) && \
3820 defined(MNTOPT_NOSUID) && \
3821 defined(MNTOPT_NOEXEC)
3822 # define FD_ON_NOSUID_CHECK_OKAY
3823 FILE *mtab = fopen("/etc/mtab", "r");
3824 struct mntent *entry;
3827 if (mtab && (fstat(fd, &stb) == 0)) {
3828 while (entry = getmntent(mtab)) {
3829 if (stat(entry->mnt_dir, &fsb) == 0
3830 && fsb.st_dev == stb.st_dev)
3832 /* found the filesystem */
3834 if (hasmntopt(entry, MNTOPT_NOSUID))
3836 if (hasmntopt(entry, MNTOPT_NOEXEC))
3839 } /* A single fs may well fail its stat(). */
3844 # endif /* getmntent+hasmntopt */
3847 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3849 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3851 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3852 return ((!check_okay) || on_nosuid || on_noexec);
3854 #endif /* IAMSUID */
3858 S_validate_suid(pTHX_ const char *validarg,
3860 const char *scriptname,
3866 SV *linestr_sv, PerlIO *rsfp)
3871 PERL_ARGS_ASSERT_VALIDATE_SUID;
3873 /* do we need to emulate setuid on scripts? */
3875 /* This code is for those BSD systems that have setuid #! scripts disabled
3876 * in the kernel because of a security problem. Merely defining DOSUID
3877 * in perl will not fix that problem, but if you have disabled setuid
3878 * scripts in the kernel, this will attempt to emulate setuid and setgid
3879 * on scripts that have those now-otherwise-useless bits set. The setuid
3880 * root version must be called suidperl or sperlN.NNN. If regular perl
3881 * discovers that it has opened a setuid script, it calls suidperl with
3882 * the same argv that it had. If suidperl finds that the script it has
3883 * just opened is NOT setuid root, it sets the effective uid back to the
3884 * uid. We don't just make perl setuid root because that loses the
3885 * effective uid we had before invoking perl, if it was different from the
3888 * Description/comments above do not match current workings:
3889 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3890 * suidperl called with script open and name changed to /dev/fd/N/X;
3891 * suidperl croaks if script is not setuid;
3892 * making perl setuid would be a huge security risk (and yes, that
3893 * would lose any euid we might have had).
3895 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3896 * be defined in suidperl only. suidperl must be setuid root. The
3897 * Configure script will set this up for you if you want it.
3900 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3901 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3902 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3904 const char *linestr;
3908 if (fdscript < 0 || !suidscript)
3909 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3911 * Since the script is opened by perl, not suidperl, some of these
3912 * checks are superfluous. Leaving them in probably does not lower
3916 * Do checks even for systems with no HAS_SETREUID.
3917 * We used to swap, then re-swap UIDs with
3918 # ifdef HAS_SETREUID
3919 if (setreuid(PL_euid,PL_uid) < 0
3920 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3921 Perl_croak(aTHX_ "Can't swap uid and euid");
3923 # ifdef HAS_SETREUID
3924 if (setreuid(PL_uid,PL_euid) < 0
3925 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3926 Perl_croak(aTHX_ "Can't reswap uid and euid");
3930 /* On this access check to make sure the directories are readable,
3931 * there is actually a small window that the user could use to make
3932 * filename point to an accessible directory. So there is a faint
3933 * chance that someone could execute a setuid script down in a
3934 * non-accessible directory. I don't know what to do about that.
3935 * But I don't think it's too important. The manual lies when
3936 * it says access() is useful in setuid programs.
3938 * So, access() is pretty useless... but not harmful... do anyway.
3940 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3941 Perl_croak(aTHX_ "Can't access() script\n");
3944 /* If we can swap euid and uid, then we can determine access rights
3945 * with a simple stat of the file, and then compare device and
3946 * inode to make sure we did stat() on the same file we opened.
3947 * Then we just have to make sure he or she can execute it.
3950 * As the script is opened by perl, not suidperl, we do not need to
3951 * care much about access rights.
3953 * The 'script changed' check is needed, or we can get lied to
3954 * about $0 with e.g.
3955 * suidperl /dev/fd/4//bin/x 4<setuidscript
3956 * Without HAS_SETREUID, is it safe to stat() as root?
3958 * Are there any operating systems that pass /dev/fd/xxx for setuid
3959 * scripts, as suggested/described in perlsec(1)? Surely they do not
3960 * pass the script name as we do, so the "script changed" test would
3961 * fail for them... but we never get here with
3962 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3964 * This is one place where we must "lie" about return status: not
3965 * say if the stat() failed. We are doing this as root, and could
3966 * be tricked into reporting existence or not of files that the
3967 * "plain" user cannot even see.
3971 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3972 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3973 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3974 Perl_croak(aTHX_ "Setuid script changed\n");
3978 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3979 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3982 * We used to do this check as the "plain" user (after swapping
3983 * UIDs). But the check for nosuid and noexec filesystem is needed,
3984 * and should be done even without HAS_SETREUID. (Maybe those
3985 * operating systems do not have such mount options anyway...)
3986 * Seems safe enough to do as root.
3988 # if !defined(NO_NOSUID_CHECK)
3989 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3990 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3993 # endif /* IAMSUID */
3995 if (!S_ISREG(PL_statbuf.st_mode)) {
3996 Perl_croak(aTHX_ "Setuid script not plain file\n");
3998 if (PL_statbuf.st_mode & S_IWOTH)
3999 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4000 PL_doswitches = FALSE; /* -s is insecure in suid */
4001 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4002 CopLINE_inc(PL_curcop);
4003 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4004 Perl_croak(aTHX_ "No #! line");
4005 linestr = SvPV_nolen_const(linestr_sv);
4006 /* required even on Sys V */
4007 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4008 Perl_croak(aTHX_ "No #! line");
4012 /* Sanity check on line length */
4013 s_end = s + strlen(s);
4014 if (s_end == s || (s_end - s) > 4000)
4015 Perl_croak(aTHX_ "Very long #! line");
4016 /* Allow more than a single space after #! */
4017 while (isSPACE(*s)) s++;
4018 /* Sanity check on buffer end */
4019 while ((*s) && !isSPACE(*s)) s++;
4020 for (s2 = s; (s2 > linestr &&
4021 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4022 || s2[-1] == '-')); s2--) ;
4023 /* Sanity check on buffer start */
4024 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4025 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4026 Perl_croak(aTHX_ "Not a perl script");
4027 while (*s == ' ' || *s == '\t') s++;
4029 * #! arg must be what we saw above. They can invoke it by
4030 * mentioning suidperl explicitly, but they may not add any strange
4031 * arguments beyond what #! says if they do invoke suidperl that way.
4034 * The way validarg was set up, we rely on the kernel to start
4035 * scripts with argv[1] set to contain all #! line switches (the
4039 * Check that we got all the arguments listed in the #! line (not
4040 * just that there are no extraneous arguments). Might not matter
4041 * much, as switches from #! line seem to be acted upon (also), and
4042 * so may be checked and trapped in perl. But, security checks must
4043 * be done in suidperl and not deferred to perl. Note that suidperl
4044 * does not get around to parsing (and checking) the switches on
4045 * the #! line (but execs perl sooner).
4046 * Allow (require) a trailing newline (which may be of two
4047 * characters on some architectures?) (but no other trailing
4050 len = strlen(validarg);
4051 if (strEQ(validarg," PHOOEY ") ||
4052 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4053 !((s_end - s) == len+1
4054 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4055 Perl_croak(aTHX_ "Args must match #! line");
4059 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4060 PL_euid == PL_statbuf.st_uid)
4062 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4063 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4064 # endif /* IAMSUID */
4067 PL_euid) { /* oops, we're not the setuid root perl */
4069 * When root runs a setuid script, we do not go through the same
4070 * steps of execing sperl and then perl with fd scripts, but
4071 * simply set up UIDs within the same perl invocation; so do
4072 * not have the same checks (on options, whatever) that we have
4073 * for plain users. No problem really: would have to be a script
4074 * that does not actually work for plain users; and if root is
4075 * foolish and can be persuaded to run such an unsafe script, he
4076 * might run also non-setuid ones, and deserves what he gets.
4078 * Or, we might drop the PL_euid check above (and rely just on
4079 * fdscript to avoid loops), and do the execs
4085 * Pass fd script to suidperl.
4086 * Exec suidperl, substituting fd script for scriptname.
4087 * Pass script name as "subdir" of fd, which perl will grok;
4088 * in fact will use that to distinguish this from "normal"
4089 * usage, see comments above.
4091 PerlIO_rewind(rsfp);
4092 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4093 /* PSz 27 Feb 04 Sanity checks on scriptname */
4094 if ((!scriptname) || (!*scriptname) ) {
4095 Perl_croak(aTHX_ "No setuid script name\n");
4097 if (*scriptname == '-') {
4098 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4099 /* Or we might confuse it with an option when replacing
4100 * name in argument list, below (though we do pointer, not
4101 * string, comparisons).
4104 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4105 if (!PL_origargv[which]) {
4106 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4108 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4109 PerlIO_fileno(rsfp), PL_origargv[which]));
4110 # if defined(HAS_FCNTL) && defined(F_SETFD)
4111 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4114 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4115 (int)PERL_REVISION, (int)PERL_VERSION,
4116 (int)PERL_SUBVERSION), PL_origargv);
4118 # endif /* IAMSUID */
4119 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4122 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4124 * This seems back to front: we try HAS_SETEGID first; if not available
4125 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4126 * in the sense that we only want to set EGID; but are there any machines
4127 * with either of the latter, but not the former? Same with UID, later.
4130 (void)setegid(PL_statbuf.st_gid);
4132 # ifdef HAS_SETREGID
4133 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4135 # ifdef HAS_SETRESGID
4136 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4138 PerlProc_setgid(PL_statbuf.st_gid);
4142 if (PerlProc_getegid() != PL_statbuf.st_gid)
4143 Perl_croak(aTHX_ "Can't do setegid!\n");
4145 if (PL_statbuf.st_mode & S_ISUID) {
4146 if (PL_statbuf.st_uid != PL_euid)
4148 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4150 # ifdef HAS_SETREUID
4151 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4153 # ifdef HAS_SETRESUID
4154 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4156 PerlProc_setuid(PL_statbuf.st_uid);
4160 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4161 Perl_croak(aTHX_ "Can't do seteuid!\n");
4163 else if (PL_uid) { /* oops, mustn't run as root */
4165 (void)seteuid((Uid_t)PL_uid);
4167 # ifdef HAS_SETREUID
4168 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4170 # ifdef HAS_SETRESUID
4171 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4173 PerlProc_setuid((Uid_t)PL_uid);
4177 if (PerlProc_geteuid() != PL_uid)
4178 Perl_croak(aTHX_ "Can't do seteuid!\n");
4181 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4182 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4185 else if (fdscript < 0 || !suidscript)
4186 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4187 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4189 /* PSz 16 Sep 03 Keep neat error message */
4190 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4193 /* We absolutely must clear out any saved ids here, so we */
4194 /* exec the real perl, substituting fd script for scriptname. */
4195 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4197 * It might be thought that using setresgid and/or setresuid (changed to
4198 * set the saved IDs) above might obviate the need to exec, and we could
4199 * go on to "do the perl thing".
4201 * Is there such a thing as "saved GID", and is that set for setuid (but
4202 * not setgid) execution like suidperl? Without exec, it would not be
4203 * cleared for setuid (but not setgid) scripts (or might need a dummy
4206 * We need suidperl to do the exact same argument checking that perl
4207 * does. Thus it cannot be very small; while it could be significantly
4208 * smaller, it is safer (simpler?) to make it essentially the same
4209 * binary as perl (but they are not identical). - Maybe could defer that
4210 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4211 * but prefer to do thorough checks in suidperl itself. Such deferral
4212 * would make suidperl security rely on perl, a design no-no.
4214 * Setuid things should be short and simple, thus easy to understand and
4215 * verify. They should do their "own thing", without influence by
4216 * attackers. It may help if their internal execution flow is fixed,
4217 * regardless of platform: it may be best to exec anyway.
4219 * Suidperl should at least be conceptually simple: a wrapper only,
4220 * never to do any real perl. Maybe we should put
4222 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4224 * into the perly bits.
4226 PerlIO_rewind(rsfp);
4227 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4229 * Keep original arguments: suidperl already has fd script.
4231 # if defined(HAS_FCNTL) && defined(F_SETFD)
4232 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4235 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4236 (int)PERL_REVISION, (int)PERL_VERSION,
4237 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4239 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4240 # endif /* IAMSUID */
4245 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4246 /* Don't even need this function. */
4249 S_validate_suid(pTHX_ PerlIO *rsfp)
4251 PERL_ARGS_ASSERT_VALIDATE_SUID;
4253 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4254 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4255 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4256 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4258 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4261 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4262 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4263 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4264 /* not set-id, must be wrapped */
4267 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4271 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4275 register const char *s2;
4276 #ifdef MACOS_TRADITIONAL
4280 PERL_ARGS_ASSERT_FIND_BEGINNING;
4282 /* skip forward in input to the real script? */
4284 #ifdef MACOS_TRADITIONAL
4285 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4287 while (PL_doextract || gMacPerl_AlwaysExtract) {
4288 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4289 if (!gMacPerl_AlwaysExtract)
4290 Perl_croak(aTHX_ "No Perl script found in input\n");
4292 if (PL_doextract) /* require explicit override ? */
4293 if (!OverrideExtract(PL_origfilename))
4294 Perl_croak(aTHX_ "User aborted script\n");
4296 PL_doextract = FALSE;
4298 /* Pater peccavi, file does not have #! */
4299 PerlIO_rewind(rsfp);
4304 while (PL_doextract) {
4305 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4306 Perl_croak(aTHX_ "No Perl script found in input\n");
4309 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4310 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4311 PL_doextract = FALSE;
4312 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4314 while (*s == ' ' || *s == '\t') s++;
4316 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4317 || s2[-1] == '_') s2--;
4318 if (strnEQ(s2-4,"perl",4))
4319 while ((s = moreswitches(s)))
4322 #ifdef MACOS_TRADITIONAL
4323 /* We are always searching for the #!perl line in MacPerl,
4324 * so if we find it, still keep the line count correct
4325 * by counting lines we already skipped over
4327 for (; maclines > 0 ; maclines--)
4328 PerlIO_ungetc(rsfp, '\n');
4332 /* gMacPerl_AlwaysExtract is false in MPW tool */
4333 } else if (gMacPerl_AlwaysExtract) {
4345 PL_uid = PerlProc_getuid();
4346 PL_euid = PerlProc_geteuid();
4347 PL_gid = PerlProc_getgid();
4348 PL_egid = PerlProc_getegid();
4350 PL_uid |= PL_gid << 16;
4351 PL_euid |= PL_egid << 16;
4353 /* Should not happen: */
4354 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4355 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4358 * Should go by suidscript, not uid!=euid: why disallow
4359 * system("ls") in scripts run from setuid things?
4360 * Or, is this run before we check arguments and set suidscript?
4361 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4362 * (We never have suidscript, can we be sure to have fdscript?)
4363 * Or must then go by UID checks? See comments in forbid_setid also.
4367 /* This is used very early in the lifetime of the program,
4368 * before even the options are parsed, so PL_tainting has
4369 * not been initialized properly. */
4371 Perl_doing_taint(int argc, char *argv[], char *envp[])
4373 #ifndef PERL_IMPLICIT_SYS
4374 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4375 * before we have an interpreter-- and the whole point of this
4376 * function is to be called at such an early stage. If you are on
4377 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4378 * "tainted because running with altered effective ids', you'll
4379 * have to add your own checks somewhere in here. The two most
4380 * known samples of 'implicitness' are Win32 and NetWare, neither
4381 * of which has much of concept of 'uids'. */
4382 int uid = PerlProc_getuid();
4383 int euid = PerlProc_geteuid();
4384 int gid = PerlProc_getgid();
4385 int egid = PerlProc_getegid();
4392 if (uid && (euid != uid || egid != gid))
4394 #endif /* !PERL_IMPLICIT_SYS */
4395 /* This is a really primitive check; environment gets ignored only
4396 * if -T are the first chars together; otherwise one gets
4397 * "Too late" message. */
4398 if ( argc > 1 && argv[1][0] == '-'
4399 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4404 /* Passing the flag as a single char rather than a string is a slight space
4405 optimisation. The only message that isn't /^-.$/ is
4406 "program input from stdin", which is substituted in place of '\0', which
4407 could never be a command line flag. */
4409 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4412 char string[3] = "-x";
4413 const char *message = "program input from stdin";
4420 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4421 if (PL_euid != PL_uid)
4422 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4423 if (PL_egid != PL_gid)
4424 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4425 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4427 * Checks for UID/GID above "wrong": why disallow
4428 * perl -e 'print "Hello\n"'
4429 * from within setuid things?? Simply drop them: replaced by
4430 * fdscript/suidscript and #ifdef IAMSUID checks below.
4432 * This may be too late for command-line switches. Will catch those on
4433 * the #! line, after finding the script name and setting up
4434 * fdscript/suidscript. Note that suidperl does not get around to
4435 * parsing (and checking) the switches on the #! line, but checks that
4436 * the two sets are identical.
4438 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4439 * instead, or would that be "too late"? (We never have suidscript, can
4440 * we be sure to have fdscript?)
4442 * Catch things with suidscript (in descendant of suidperl), even with
4443 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4444 * below; but I am paranoid.
4446 * Also see comments about root running a setuid script, elsewhere.
4449 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4451 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4452 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4453 #endif /* IAMSUID */
4457 Perl_init_debugger(pTHX)
4460 HV * const ostash = PL_curstash;
4462 PL_curstash = PL_debstash;
4463 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4465 AvREAL_off(PL_dbargs);
4466 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4467 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4468 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4469 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4470 sv_setiv(PL_DBsingle, 0);
4471 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4472 sv_setiv(PL_DBtrace, 0);
4473 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4474 sv_setiv(PL_DBsignal, 0);
4475 PL_curstash = ostash;
4478 #ifndef STRESS_REALLOC
4479 #define REASONABLE(size) (size)
4481 #define REASONABLE(size) (1) /* unreasonable */
4485 Perl_init_stacks(pTHX)
4488 /* start with 128-item stack and 8K cxstack */
4489 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4490 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4491 PL_curstackinfo->si_type = PERLSI_MAIN;
4492 PL_curstack = PL_curstackinfo->si_stack;
4493 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4495 PL_stack_base = AvARRAY(PL_curstack);
4496 PL_stack_sp = PL_stack_base;
4497 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4499 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4502 PL_tmps_max = REASONABLE(128);
4504 Newx(PL_markstack,REASONABLE(32),I32);
4505 PL_markstack_ptr = PL_markstack;
4506 PL_markstack_max = PL_markstack + REASONABLE(32);
4510 Newx(PL_scopestack,REASONABLE(32),I32);
4511 PL_scopestack_ix = 0;
4512 PL_scopestack_max = REASONABLE(32);
4514 Newx(PL_savestack,REASONABLE(128),ANY);
4515 PL_savestack_ix = 0;
4516 PL_savestack_max = REASONABLE(128);
4525 while (PL_curstackinfo->si_next)
4526 PL_curstackinfo = PL_curstackinfo->si_next;
4527 while (PL_curstackinfo) {
4528 PERL_SI *p = PL_curstackinfo->si_prev;
4529 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4530 Safefree(PL_curstackinfo->si_cxstack);
4531 Safefree(PL_curstackinfo);
4532 PL_curstackinfo = p;
4534 Safefree(PL_tmps_stack);
4535 Safefree(PL_markstack);
4536 Safefree(PL_scopestack);
4537 Safefree(PL_savestack);
4542 S_init_predump_symbols(pTHX)
4548 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4549 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4550 GvMULTI_on(PL_stdingv);
4551 io = GvIOp(PL_stdingv);
4552 IoTYPE(io) = IoTYPE_RDONLY;
4553 IoIFP(io) = PerlIO_stdin();
4554 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4556 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4558 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4561 IoTYPE(io) = IoTYPE_WRONLY;
4562 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4564 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4566 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4568 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4569 GvMULTI_on(PL_stderrgv);
4570 io = GvIOp(PL_stderrgv);
4571 IoTYPE(io) = IoTYPE_WRONLY;
4572 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4573 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4575 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4577 PL_statname = newSV(0); /* last filename we did stat on */
4579 Safefree(PL_osname);
4580 PL_osname = savepv(OSNAME);
4584 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4588 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4590 argc--,argv++; /* skip name of script */
4591 if (PL_doswitches) {
4592 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4596 if (argv[0][1] == '-' && !argv[0][2]) {
4600 if ((s = strchr(argv[0], '='))) {
4601 const char *const start_name = argv[0] + 1;
4602 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4603 TRUE, SVt_PV)), s + 1);
4606 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4609 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4610 GvMULTI_on(PL_argvgv);
4611 (void)gv_AVadd(PL_argvgv);
4612 av_clear(GvAVn(PL_argvgv));
4613 for (; argc > 0; argc--,argv++) {
4614 SV * const sv = newSVpv(argv[0],0);
4615 av_push(GvAVn(PL_argvgv),sv);
4616 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4617 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4620 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4621 (void)sv_utf8_decode(sv);
4627 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4632 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4634 PL_toptarget = newSV_type(SVt_PVFM);
4635 sv_setpvn(PL_toptarget, "", 0);
4636 PL_bodytarget = newSV_type(SVt_PVFM);
4637 sv_setpvn(PL_bodytarget, "", 0);
4638 PL_formtarget = PL_bodytarget;
4642 init_argv_symbols(argc,argv);
4644 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4645 #ifdef MACOS_TRADITIONAL
4646 /* $0 is not majick on a Mac */
4647 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4649 sv_setpv(GvSV(tmpgv),PL_origfilename);
4650 magicname("0", "0", 1);
4653 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4655 bool env_is_not_environ;
4656 GvMULTI_on(PL_envgv);
4657 hv = GvHVn(PL_envgv);
4658 hv_magic(hv, NULL, PERL_MAGIC_env);
4660 #ifdef USE_ENVIRON_ARRAY
4661 /* Note that if the supplied env parameter is actually a copy
4662 of the global environ then it may now point to free'd memory
4663 if the environment has been modified since. To avoid this
4664 problem we treat env==NULL as meaning 'use the default'
4668 env_is_not_environ = env != environ;
4669 if (env_is_not_environ
4670 # ifdef USE_ITHREADS
4671 && PL_curinterp == aTHX
4680 for (; *env; env++) {
4681 if (!(s = strchr(*env,'=')) || s == *env)
4683 #if defined(MSDOS) && !defined(DJGPP)
4688 sv = newSVpv(s+1, 0);
4689 (void)hv_store(hv, *env, s - *env, sv, 0);
4690 if (env_is_not_environ)
4694 #endif /* USE_ENVIRON_ARRAY */
4695 #endif /* !PERL_MICRO */
4698 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4699 SvREADONLY_off(GvSV(tmpgv));
4700 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4701 SvREADONLY_on(GvSV(tmpgv));
4703 #ifdef THREADS_HAVE_PIDS
4704 PL_ppid = (IV)getppid();
4707 /* touch @F array to prevent spurious warnings 20020415 MJD */
4709 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4714 S_init_perllib(pTHX)
4720 s = PerlEnv_getenv("PERL5LIB");
4722 * It isn't possible to delete an environment variable with
4723 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4724 * case we treat PERL5LIB as undefined if it has a zero-length value.
4726 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4727 if (s && *s != '\0')
4731 incpush(s, TRUE, TRUE, TRUE, FALSE);
4733 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4735 /* Treat PERL5?LIB as a possible search list logical name -- the
4736 * "natural" VMS idiom for a Unix path string. We allow each
4737 * element to be a set of |-separated directories for compatibility.
4741 if (my_trnlnm("PERL5LIB",buf,0))
4742 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4744 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4748 /* Use the ~-expanded versions of APPLLIB (undocumented),
4749 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4752 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4756 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4758 #ifdef MACOS_TRADITIONAL
4761 SV * privdir = newSV(0);
4762 char * macperl = PerlEnv_getenv("MACPERL");
4767 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4768 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4769 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4770 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4771 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4772 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4774 SvREFCNT_dec(privdir);
4777 incpush(":", FALSE, FALSE, TRUE, FALSE);
4780 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4783 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4785 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4789 /* sitearch is always relative to sitelib on Windows for
4790 * DLL-based path intuition to work correctly */
4791 # if !defined(WIN32)
4792 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4798 /* this picks up sitearch as well */
4799 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4801 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4805 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4806 /* Search for version-specific dirs below here */
4807 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4810 #ifdef PERL_VENDORARCH_EXP
4811 /* vendorarch is always relative to vendorlib on Windows for
4812 * DLL-based path intuition to work correctly */
4813 # if !defined(WIN32)
4814 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4818 #ifdef PERL_VENDORLIB_EXP
4820 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4822 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4826 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4827 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4830 #ifdef PERL_OTHERLIBDIRS
4831 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4835 incpush(".", FALSE, FALSE, TRUE, FALSE);
4836 #endif /* MACOS_TRADITIONAL */
4839 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4840 # define PERLLIB_SEP ';'
4843 # define PERLLIB_SEP '|'
4845 # if defined(MACOS_TRADITIONAL)
4846 # define PERLLIB_SEP ','
4848 # define PERLLIB_SEP ':'
4852 #ifndef PERLLIB_MANGLE
4853 # define PERLLIB_MANGLE(s,n) (s)
4856 /* Push a directory onto @INC if it exists.
4857 Generate a new SV if we do this, to save needing to copy the SV we push
4860 S_incpush_if_exists(pTHX_ SV *dir)
4865 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4867 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4868 S_ISDIR(tmpstatbuf.st_mode)) {
4869 av_push(GvAVn(PL_incgv), dir);
4876 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4881 const char *p = dir;
4886 if (addsubdirs || addoldvers) {
4890 /* Break at all separators */
4892 SV *libdir = newSV(0);
4895 /* skip any consecutive separators */
4897 while ( *p == PERLLIB_SEP ) {
4898 /* Uncomment the next line for PATH semantics */
4899 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4904 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4905 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4910 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4911 p = NULL; /* break out */
4913 #ifdef MACOS_TRADITIONAL
4914 if (!strchr(SvPVX(libdir), ':')) {
4917 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4919 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4920 sv_catpvs(libdir, ":");
4923 /* Do the if() outside the #ifdef to avoid warnings about an unused
4926 #ifdef PERL_RELOCATABLE_INC
4928 * Relocatable include entries are marked with a leading .../
4931 * 0: Remove that leading ".../"
4932 * 1: Remove trailing executable name (anything after the last '/')
4933 * from the perl path to give a perl prefix
4935 * While the @INC element starts "../" and the prefix ends with a real
4936 * directory (ie not . or ..) chop that real directory off the prefix
4937 * and the leading "../" from the @INC element. ie a logical "../"
4939 * Finally concatenate the prefix and the remainder of the @INC element
4940 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4941 * generates /usr/local/lib/perl5
4943 const char *libpath = SvPVX(libdir);
4944 STRLEN libpath_len = SvCUR(libdir);
4945 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4947 SV * const caret_X = get_sv("\030", 0);
4948 /* Going to use the SV just as a scratch buffer holding a C
4954 /* $^X is *the* source of taint if tainting is on, hence
4955 SvPOK() won't be true. */
4957 assert(SvPOKp(caret_X));
4958 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4960 /* Firstly take off the leading .../
4961 If all else fail we'll do the paths relative to the current
4963 sv_chop(libdir, libpath + 4);
4964 /* Don't use SvPV as we're intentionally bypassing taining,
4965 mortal copies that the mg_get of tainting creates, and
4966 corruption that seems to come via the save stack.
4967 I guess that the save stack isn't correctly set up yet. */
4968 libpath = SvPVX(libdir);
4969 libpath_len = SvCUR(libdir);
4971 /* This would work more efficiently with memrchr, but as it's
4972 only a GNU extension we'd need to probe for it and
4973 implement our own. Not hard, but maybe not worth it? */
4975 prefix = SvPVX(prefix_sv);
4976 lastslash = strrchr(prefix, '/');
4978 /* First time in with the *lastslash = '\0' we just wipe off
4979 the trailing /perl from (say) /usr/foo/bin/perl
4983 while ((*lastslash = '\0'), /* Do that, come what may. */
4984 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4985 && (lastslash = strrchr(prefix, '/')))) {
4986 if (lastslash[1] == '\0'
4987 || (lastslash[1] == '.'
4988 && (lastslash[2] == '/' /* ends "/." */
4989 || (lastslash[2] == '/'
4990 && lastslash[3] == '/' /* or "/.." */
4992 /* Prefix ends "/" or "/." or "/..", any of which
4993 are fishy, so don't do any more logical cleanup.
4997 /* Remove leading "../" from path */
5000 /* Next iteration round the loop removes the last
5001 directory name from prefix by writing a '\0' in
5002 the while clause. */
5004 /* prefix has been terminated with a '\0' to the correct
5005 length. libpath points somewhere into the libdir SV.
5006 We need to join the 2 with '/' and drop the result into
5008 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5009 SvREFCNT_dec(libdir);
5010 /* And this is the new libdir. */
5013 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5014 /* Need to taint reloccated paths if running set ID */
5015 SvTAINTED_on(libdir);
5018 SvREFCNT_dec(prefix_sv);
5023 * BEFORE pushing libdir onto @INC we may first push version- and
5024 * archname-specific sub-directories.
5026 if (addsubdirs || addoldvers) {
5027 #ifdef PERL_INC_VERSION_LIST
5028 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5029 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5030 const char * const *incver;
5036 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5038 while (unix[len-1] == '/') len--; /* Cosmetic */
5039 sv_usepvn(libdir,unix,len);
5042 PerlIO_printf(Perl_error_log,
5043 "Failed to unixify @INC element \"%s\"\n",
5047 #ifdef MACOS_TRADITIONAL
5048 #define PERL_AV_SUFFIX_FMT ""
5049 #define PERL_ARCH_FMT "%s:"
5050 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5052 #define PERL_AV_SUFFIX_FMT "/"
5053 #define PERL_ARCH_FMT "/%s"
5054 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5056 /* .../version/archname if -d .../version/archname */
5057 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5059 (int)PERL_REVISION, (int)PERL_VERSION,
5060 (int)PERL_SUBVERSION, ARCHNAME);
5061 subdir = S_incpush_if_exists(aTHX_ subdir);
5063 /* .../version if -d .../version */
5064 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5066 (int)PERL_REVISION, (int)PERL_VERSION,
5067 (int)PERL_SUBVERSION);
5068 subdir = S_incpush_if_exists(aTHX_ subdir);
5070 /* .../archname if -d .../archname */
5071 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5072 SVfARG(libdir), ARCHNAME);
5073 subdir = S_incpush_if_exists(aTHX_ subdir);
5077 #ifdef PERL_INC_VERSION_LIST
5079 for (incver = incverlist; *incver; incver++) {
5080 /* .../xxx if -d .../xxx */
5081 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5082 SVfARG(libdir), *incver);
5083 subdir = S_incpush_if_exists(aTHX_ subdir);
5089 /* finally push this lib directory on the end of @INC */
5090 av_push(GvAVn(PL_incgv), libdir);
5093 assert (SvREFCNT(subdir) == 1);
5094 SvREFCNT_dec(subdir);
5100 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5104 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5110 PERL_ARGS_ASSERT_CALL_LIST;
5112 while (av_len(paramList) >= 0) {
5113 cv = (CV*)av_shift(paramList);
5115 if (paramList == PL_beginav) {
5116 /* save PL_beginav for compiler */
5117 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5119 else if (paramList == PL_checkav) {
5120 /* save PL_checkav for compiler */
5121 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5123 else if (paramList == PL_unitcheckav) {
5124 /* save PL_unitcheckav for compiler */
5125 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5136 PL_madskills |= 16384;
5141 PL_madskills &= ~16384;
5144 (void)SvPV_const(atsv, len);
5146 PL_curcop = &PL_compiling;
5147 CopLINE_set(PL_curcop, oldline);
5148 if (paramList == PL_beginav)
5149 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5151 Perl_sv_catpvf(aTHX_ atsv,
5152 "%s failed--call queue aborted",
5153 paramList == PL_checkav ? "CHECK"
5154 : paramList == PL_initav ? "INIT"
5155 : paramList == PL_unitcheckav ? "UNITCHECK"
5157 while (PL_scopestack_ix > oldscope)
5160 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5167 /* my_exit() was called */
5168 while (PL_scopestack_ix > oldscope)
5171 PL_curstash = PL_defstash;
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5175 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5176 if (paramList == PL_beginav)
5177 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5179 Perl_croak(aTHX_ "%s failed--call queue aborted",
5180 paramList == PL_checkav ? "CHECK"
5181 : paramList == PL_initav ? "INIT"
5182 : paramList == PL_unitcheckav ? "UNITCHECK"
5189 PL_curcop = &PL_compiling;
5190 CopLINE_set(PL_curcop, oldline);
5193 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5202 Perl_my_exit(pTHX_ U32 status)
5213 STATUS_EXIT_SET(status);
5220 Perl_my_failure_exit(pTHX)
5224 /* We have been called to fall on our sword. The desired exit code
5225 * should be already set in STATUS_UNIX, but could be shifted over
5226 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5229 * If an error code has not been set, then force the issue.
5231 if (MY_POSIX_EXIT) {
5233 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5234 * the exit code when there isn't an error.
5237 if (STATUS_UNIX == 0)
5238 STATUS_UNIX_EXIT_SET(255);
5240 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5242 /* The exit code could have been set by $? or vmsish which
5243 * means that it may not be fatal. So convert
5244 * success/warning codes to fatal.
5246 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5247 STATUS_UNIX_EXIT_SET(255);
5251 /* Traditionally Perl on VMS always expects a Fatal Error. */
5252 if (vaxc$errno & 1) {
5254 /* So force success status to failure */
5255 if (STATUS_NATIVE & 1)
5260 STATUS_UNIX = EINTR; /* In case something cares */
5265 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5267 /* Encode the severity code */
5268 severity = STATUS_NATIVE & STS$M_SEVERITY;
5269 STATUS_UNIX = (severity ? severity : 1) << 8;
5271 /* Perl expects this to be a fatal error */
5272 if (severity != STS$K_SEVERE)
5281 STATUS_UNIX_SET(errno);
5283 exitstatus = STATUS_UNIX >> 8;
5284 if (exitstatus & 255)
5285 STATUS_UNIX_SET(exitstatus);
5287 STATUS_UNIX_SET(255);
5294 S_my_exit_jump(pTHX)
5299 SvREFCNT_dec(PL_e_script);
5303 POPSTACK_TO(PL_mainstack);
5311 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5314 const char * const p = SvPVX_const(PL_e_script);
5315 const char *nl = strchr(p, '\n');
5317 PERL_UNUSED_ARG(idx);
5318 PERL_UNUSED_ARG(maxlen);
5320 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5322 filter_del(read_e_script);
5325 sv_catpvn(buf_sv, p, nl-p);
5326 sv_chop(PL_e_script, nl);
5332 * c-indentation-style: bsd
5334 * indent-tabs-mode: t
5337 * ex: set ts=8 sts=4 sw=4 noet: