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)
3029 PERL_ARGS_ASSERT_MORESWITCHES;
3037 SvREFCNT_dec(PL_rs);
3038 if (s[1] == 'x' && s[2]) {
3039 const char *e = s+=2;
3045 flags = PERL_SCAN_SILENT_ILLDIGIT;
3046 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3047 if (s + numlen < e) {
3048 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3052 PL_rs = newSVpvs("");
3053 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3054 tmps = (U8*)SvPVX(PL_rs);
3055 uvchr_to_utf8(tmps, rschar);
3056 SvCUR_set(PL_rs, UNISKIP(rschar));
3061 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3062 if (rschar & ~((U8)~0))
3063 PL_rs = &PL_sv_undef;
3064 else if (!rschar && numlen >= 2)
3065 PL_rs = newSVpvs("");
3067 char ch = (char)rschar;
3068 PL_rs = newSVpvn(&ch, 1);
3071 sv_setsv(get_sv("/", TRUE), PL_rs);
3076 PL_unicode = parse_unicode_opts( (const char **)&s );
3077 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3083 while (*s && !isSPACE(*s)) ++s;
3084 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3095 forbid_setid('d', FALSE);
3098 /* -dt indicates to the debugger that threads will be used */
3099 if (*s == 't' && !isALNUM(s[1])) {
3101 my_setenv("PERL5DB_THREADED", "1");
3104 /* The following permits -d:Mod to accepts arguments following an =
3105 in the fashion that -MSome::Mod does. */
3106 if (*s == ':' || *s == '=') {
3107 const char *start = ++s;
3108 const char *const end = s + strlen(s);
3109 SV * const sv = newSVpvs("use Devel::");
3111 /* We now allow -d:Module=Foo,Bar */
3112 while(isALNUM(*s) || *s==':') ++s;
3114 sv_catpvn(sv, start, end - start);
3116 sv_catpvn(sv, start, s-start);
3117 /* Don't use NUL as q// delimiter here, this string goes in the
3119 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3122 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3126 PL_perldb = PERLDB_ALL;
3133 forbid_setid('D', FALSE);
3135 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3136 #else /* !DEBUGGING */
3137 if (ckWARN_d(WARN_DEBUGGING))
3138 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3139 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3140 for (s++; isALNUM(*s); s++) ;
3145 usage(PL_origargv[0]);
3148 Safefree(PL_inplace);
3149 #if defined(__CYGWIN__) /* do backup extension automagically */
3150 if (*(s+1) == '\0') {
3151 PL_inplace = savepvs(".bak");
3154 #endif /* __CYGWIN__ */
3156 const char * const start = ++s;
3157 while (*s && !isSPACE(*s))
3160 PL_inplace = savepvn(start, s - start);
3164 if (*s == '-') /* Additional switches on #! line. */
3168 case 'I': /* -I handled both here and in parse_body() */
3169 forbid_setid('I', FALSE);
3171 while (*s && isSPACE(*s))
3176 /* ignore trailing spaces (possibly followed by other switches) */
3178 for (e = p; *e && !isSPACE(*e); e++) ;
3182 } while (*p && *p != '-');
3183 e = savepvn(s, e-s);
3184 incpush(e, TRUE, TRUE, FALSE, FALSE);
3191 Perl_croak(aTHX_ "No directory specified for -I");
3197 SvREFCNT_dec(PL_ors_sv);
3203 PL_ors_sv = newSVpvs("\n");
3204 numlen = 3 + (*s == '0');
3205 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3209 if (RsPARA(PL_rs)) {
3210 PL_ors_sv = newSVpvs("\n\n");
3213 PL_ors_sv = newSVsv(PL_rs);
3218 forbid_setid('M', FALSE); /* XXX ? */
3221 forbid_setid('m', FALSE); /* XXX ? */
3226 const char *use = "use ";
3227 /* -M-foo == 'no foo' */
3228 /* Leading space on " no " is deliberate, to make both
3229 possibilities the same length. */
3230 if (*s == '-') { use = " no "; ++s; }
3231 sv = newSVpvn(use,4);
3233 /* We allow -M'Module qw(Foo Bar)' */
3234 while(isALNUM(*s) || *s==':') ++s;
3235 end = s + strlen(s);
3237 sv_catpvn(sv, start, end - start);
3238 if (*(start-1) == 'm') {
3240 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3241 sv_catpvs( sv, " ()");
3245 Perl_croak(aTHX_ "Module name required with -%c option",
3247 sv_catpvn(sv, start, s-start);
3248 /* Use NUL as q''-delimiter. */
3249 sv_catpvs(sv, " split(/,/,q\0");
3251 sv_catpvn(sv, s, end - s);
3252 sv_catpvs(sv, "\0)");
3255 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3258 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3269 forbid_setid('s', FALSE);
3270 PL_doswitches = TRUE;
3284 #ifdef MACOS_TRADITIONAL
3285 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3287 PL_do_undump = TRUE;
3295 if (!sv_derived_from(PL_patchlevel, "version"))
3296 upg_version(PL_patchlevel, TRUE);
3298 PerlIO_printf(PerlIO_stdout(),
3299 Perl_form(aTHX_ "\nThis is perl, %"SVf
3300 #ifdef PERL_PATCHNUM
3301 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3304 SVfARG(vstringify(PL_patchlevel)),
3307 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3308 PerlIO_printf(PerlIO_stdout(),
3309 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3310 SVfARG(vstringify(PL_patchlevel))));
3311 PerlIO_printf(PerlIO_stdout(),
3312 Perl_form(aTHX_ " built under %s at %s %s\n",
3313 OSNAME, __DATE__, __TIME__));
3314 PerlIO_printf(PerlIO_stdout(),
3315 Perl_form(aTHX_ " OS Specific Release: %s\n",
3319 #if defined(LOCAL_PATCH_COUNT)
3320 if (LOCAL_PATCH_COUNT > 0)
3321 PerlIO_printf(PerlIO_stdout(),
3322 "\n(with %d registered patch%s, "
3323 "see perl -V for more detail)",
3325 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "\n\nCopyright 1987-2007, Larry Wall\n");
3330 #ifdef MACOS_TRADITIONAL
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3333 "maintained by Chris Nandor\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3342 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3347 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "atariST series port, ++jrb bammi@cadence.com\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3366 PerlIO_printf(PerlIO_stdout(),
3367 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3370 PerlIO_printf(PerlIO_stdout(),
3371 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3374 PerlIO_printf(PerlIO_stdout(),
3375 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3378 PerlIO_printf(PerlIO_stdout(),
3379 "MiNT port by Guido Flohr, 1997-1999\n");
3382 PerlIO_printf(PerlIO_stdout(),
3383 "EPOC port by Olaf Flebbe, 1999-2002\n");
3386 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3387 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3390 #ifdef __SYMBIAN32__
3391 PerlIO_printf(PerlIO_stdout(),
3392 "Symbian port by Nokia, 2004-2005\n");
3394 #ifdef BINARY_BUILD_NOTICE
3395 BINARY_BUILD_NOTICE;
3397 PerlIO_printf(PerlIO_stdout(),
3399 Perl may be copied only under the terms of either the Artistic License or the\n\
3400 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3401 Complete documentation for Perl, including FAQ lists, should be found on\n\
3402 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3403 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3406 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3407 PL_dowarn |= G_WARN_ON;
3412 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3413 if (!specialWARN(PL_compiling.cop_warnings))
3414 PerlMemShared_free(PL_compiling.cop_warnings);
3415 PL_compiling.cop_warnings = pWARN_ALL ;
3419 PL_dowarn = G_WARN_ALL_OFF;
3420 if (!specialWARN(PL_compiling.cop_warnings))
3421 PerlMemShared_free(PL_compiling.cop_warnings);
3422 PL_compiling.cop_warnings = pWARN_NONE ;
3427 if (s[1] == '-') /* Additional switches on #! line. */
3432 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3438 #ifdef ALTERNATE_SHEBANG
3439 case 'S': /* OS/2 needs -S on "extproc" line. */
3443 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3448 /* compliments of Tom Christiansen */
3450 /* unexec() can be found in the Gnu emacs distribution */
3451 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3454 Perl_my_unexec(pTHX)
3456 PERL_UNUSED_CONTEXT;
3458 SV * prog = newSVpv(BIN_EXP, 0);
3459 SV * file = newSVpv(PL_origfilename, 0);
3463 sv_catpvs(prog, "/perl");
3464 sv_catpvs(file, ".perldump");
3466 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3467 /* unexec prints msg to stderr in case of failure */
3468 PerlProc_exit(status);
3471 # include <lib$routines.h>
3472 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3473 # elif defined(WIN32) || defined(__CYGWIN__)
3474 Perl_croak(aTHX_ "dump is not supported");
3476 ABORT(); /* for use with undump */
3481 /* initialize curinterp */
3487 # define PERLVAR(var,type)
3488 # define PERLVARA(var,n,type)
3489 # if defined(PERL_IMPLICIT_CONTEXT)
3490 # define PERLVARI(var,type,init) aTHX->var = init;
3491 # define PERLVARIC(var,type,init) aTHX->var = init;
3493 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3494 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3496 # include "intrpvar.h"
3502 # define PERLVAR(var,type)
3503 # define PERLVARA(var,n,type)
3504 # define PERLVARI(var,type,init) PL_##var = init;
3505 # define PERLVARIC(var,type,init) PL_##var = init;
3506 # include "intrpvar.h"
3513 /* As these are inside a structure, PERLVARI isn't capable of initialising
3515 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3516 PL_reg_poscache = PL_reg_starttry = NULL;
3520 S_init_main_stash(pTHX)
3525 PL_curstash = PL_defstash = newHV();
3526 /* We know that the string "main" will be in the global shared string
3527 table, so it's a small saving to use it rather than allocate another
3529 PL_curstname = newSVpvs_share("main");
3530 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3531 /* If we hadn't caused another reference to "main" to be in the shared
3532 string table above, then it would be worth reordering these two,
3533 because otherwise all we do is delete "main" from it as a consequence
3534 of the SvREFCNT_dec, only to add it again with hv_name_set */
3535 SvREFCNT_dec(GvHV(gv));
3536 hv_name_set(PL_defstash, "main", 4, 0);
3537 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3539 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3541 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3542 GvMULTI_on(PL_incgv);
3543 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3544 GvMULTI_on(PL_hintgv);
3545 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3546 SvREFCNT_inc_simple_void(PL_defgv);
3547 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3548 SvREFCNT_inc_simple_void(PL_errgv);
3549 GvMULTI_on(PL_errgv);
3550 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3551 GvMULTI_on(PL_replgv);
3552 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3553 #ifdef PERL_DONT_CREATE_GVSV
3556 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3557 sv_setpvn(ERRSV, "", 0);
3558 PL_curstash = PL_defstash;
3559 CopSTASH_set(&PL_compiling, PL_defstash);
3560 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3561 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3563 /* We must init $/ before switches are processed. */
3564 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3568 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3569 bool *suidscript, PerlIO **rsfpp)
3574 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3577 PL_origfilename = savepvs("-e");
3580 /* if find_script() returns, it returns a malloc()-ed value */
3581 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3583 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3584 const char *s = scriptname + 8;
3590 * Tell apart "normal" usage of fdscript, e.g.
3591 * with bash on FreeBSD:
3592 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3593 * from usage in suidperl.
3594 * Does any "normal" usage leave garbage after the number???
3595 * Is it a mistake to use a similar /dev/fd/ construct for
3600 * Be supersafe and do some sanity-checks.
3601 * Still, can we be sure we got the right thing?
3604 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3607 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3609 scriptname = savepv(s + 1);
3610 Safefree(PL_origfilename);
3611 PL_origfilename = (char *)scriptname;
3616 CopFILE_free(PL_curcop);
3617 CopFILE_set(PL_curcop, PL_origfilename);
3618 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3619 scriptname = (char *)"";
3620 if (fdscript >= 0) {
3621 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3622 # if defined(HAS_FCNTL) && defined(F_SETFD)
3624 /* ensure close-on-exec */
3625 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3630 Perl_croak(aTHX_ "sperl needs fd script\n"
3631 "You should not call sperl directly; do you need to "
3632 "change a #! line\nfrom sperl to perl?\n");
3635 * Do not open (or do other fancy stuff) while setuid.
3636 * Perl does the open, and hands script to suidperl on a fd;
3637 * suidperl only does some checks, sets up UIDs and re-execs
3638 * perl with that fd as it has always done.
3642 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3645 else if (!*scriptname) {
3646 forbid_setid(0, *suidscript);
3647 *rsfpp = PerlIO_stdin();
3650 #ifdef FAKE_BIT_BUCKET
3651 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3652 * is called) and still have the "-e" work. (Believe it or not,
3653 * a /dev/null is required for the "-e" to work because source
3654 * filter magic is used to implement it. ) This is *not* a general
3655 * replacement for a /dev/null. What we do here is create a temp
3656 * file (an empty file), open up that as the script, and then
3657 * immediately close and unlink it. Close enough for jazz. */
3658 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3659 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3660 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3661 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3662 FAKE_BIT_BUCKET_TEMPLATE
3664 const char * const err = "Failed to create a fake bit bucket";
3665 if (strEQ(scriptname, BIT_BUCKET)) {
3666 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3667 int tmpfd = mkstemp(tmpname);
3669 scriptname = tmpname;
3672 Perl_croak(aTHX_ err);
3675 scriptname = mktemp(tmpname);
3677 Perl_croak(aTHX_ err);
3682 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3683 #ifdef FAKE_BIT_BUCKET
3684 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3685 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3686 && strlen(scriptname) == sizeof(tmpname) - 1) {
3689 scriptname = BIT_BUCKET;
3691 # if defined(HAS_FCNTL) && defined(F_SETFD)
3693 /* ensure close-on-exec */
3694 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3697 #endif /* IAMSUID */
3699 /* PSz 16 Sep 03 Keep neat error message */
3701 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3703 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3704 CopFILE(PL_curcop), Strerror(errno));
3710 * I_SYSSTATVFS HAS_FSTATVFS
3712 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3713 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3714 * here so that metaconfig picks them up. */
3718 S_fd_on_nosuid_fs(pTHX_ int fd)
3721 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3722 * but is needed also on machines without setreuid.
3723 * Seems safe enough to run as root.
3725 int check_okay = 0; /* able to do all the required sys/libcalls */
3726 int on_nosuid = 0; /* the fd is on a nosuid fs */
3728 * Need to check noexec also: nosuid might not be set, the average
3729 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3731 int on_noexec = 0; /* the fd is on a noexec fs */
3734 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3735 * fstatvfs() is UNIX98.
3736 * fstatfs() is 4.3 BSD.
3737 * ustat()+getmnt() is pre-4.3 BSD.
3738 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3739 * an irrelevant filesystem while trying to reach the right one.
3742 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3744 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3745 defined(HAS_FSTATVFS)
3746 # define FD_ON_NOSUID_CHECK_OKAY
3747 struct statvfs stfs;
3749 check_okay = fstatvfs(fd, &stfs) == 0;
3750 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3752 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3753 on platforms where it is present. */
3754 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3756 # endif /* fstatvfs */
3758 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3759 defined(PERL_MOUNT_NOSUID) && \
3760 defined(PERL_MOUNT_NOEXEC) && \
3761 defined(HAS_FSTATFS) && \
3762 defined(HAS_STRUCT_STATFS) && \
3763 defined(HAS_STRUCT_STATFS_F_FLAGS)
3764 # define FD_ON_NOSUID_CHECK_OKAY
3767 check_okay = fstatfs(fd, &stfs) == 0;
3768 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3769 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3770 # endif /* fstatfs */
3772 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3773 defined(PERL_MOUNT_NOSUID) && \
3774 defined(PERL_MOUNT_NOEXEC) && \
3775 defined(HAS_FSTAT) && \
3776 defined(HAS_USTAT) && \
3777 defined(HAS_GETMNT) && \
3778 defined(HAS_STRUCT_FS_DATA) && \
3780 # define FD_ON_NOSUID_CHECK_OKAY
3783 if (fstat(fd, &fdst) == 0) {
3785 if (ustat(fdst.st_dev, &us) == 0) {
3787 /* NOSTAT_ONE here because we're not examining fields which
3788 * vary between that case and STAT_ONE. */
3789 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3790 size_t cmplen = sizeof(us.f_fname);
3791 if (sizeof(fsd.fd_req.path) < cmplen)
3792 cmplen = sizeof(fsd.fd_req.path);
3793 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3794 fdst.st_dev == fsd.fd_req.dev) {
3796 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3797 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3802 # endif /* fstat+ustat+getmnt */
3804 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3805 defined(HAS_GETMNTENT) && \
3806 defined(HAS_HASMNTOPT) && \
3807 defined(MNTOPT_NOSUID) && \
3808 defined(MNTOPT_NOEXEC)
3809 # define FD_ON_NOSUID_CHECK_OKAY
3810 FILE *mtab = fopen("/etc/mtab", "r");
3811 struct mntent *entry;
3814 if (mtab && (fstat(fd, &stb) == 0)) {
3815 while (entry = getmntent(mtab)) {
3816 if (stat(entry->mnt_dir, &fsb) == 0
3817 && fsb.st_dev == stb.st_dev)
3819 /* found the filesystem */
3821 if (hasmntopt(entry, MNTOPT_NOSUID))
3823 if (hasmntopt(entry, MNTOPT_NOEXEC))
3826 } /* A single fs may well fail its stat(). */
3831 # endif /* getmntent+hasmntopt */
3834 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3836 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3838 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3839 return ((!check_okay) || on_nosuid || on_noexec);
3841 #endif /* IAMSUID */
3845 S_validate_suid(pTHX_ const char *validarg,
3847 const char *scriptname,
3853 SV *linestr_sv, PerlIO *rsfp)
3858 PERL_ARGS_ASSERT_VALIDATE_SUID;
3860 /* do we need to emulate setuid on scripts? */
3862 /* This code is for those BSD systems that have setuid #! scripts disabled
3863 * in the kernel because of a security problem. Merely defining DOSUID
3864 * in perl will not fix that problem, but if you have disabled setuid
3865 * scripts in the kernel, this will attempt to emulate setuid and setgid
3866 * on scripts that have those now-otherwise-useless bits set. The setuid
3867 * root version must be called suidperl or sperlN.NNN. If regular perl
3868 * discovers that it has opened a setuid script, it calls suidperl with
3869 * the same argv that it had. If suidperl finds that the script it has
3870 * just opened is NOT setuid root, it sets the effective uid back to the
3871 * uid. We don't just make perl setuid root because that loses the
3872 * effective uid we had before invoking perl, if it was different from the
3875 * Description/comments above do not match current workings:
3876 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3877 * suidperl called with script open and name changed to /dev/fd/N/X;
3878 * suidperl croaks if script is not setuid;
3879 * making perl setuid would be a huge security risk (and yes, that
3880 * would lose any euid we might have had).
3882 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3883 * be defined in suidperl only. suidperl must be setuid root. The
3884 * Configure script will set this up for you if you want it.
3887 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3888 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3889 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3891 const char *linestr;
3895 if (fdscript < 0 || !suidscript)
3896 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3898 * Since the script is opened by perl, not suidperl, some of these
3899 * checks are superfluous. Leaving them in probably does not lower
3903 * Do checks even for systems with no HAS_SETREUID.
3904 * We used to swap, then re-swap UIDs with
3905 # ifdef HAS_SETREUID
3906 if (setreuid(PL_euid,PL_uid) < 0
3907 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3908 Perl_croak(aTHX_ "Can't swap uid and euid");
3910 # ifdef HAS_SETREUID
3911 if (setreuid(PL_uid,PL_euid) < 0
3912 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3913 Perl_croak(aTHX_ "Can't reswap uid and euid");
3917 /* On this access check to make sure the directories are readable,
3918 * there is actually a small window that the user could use to make
3919 * filename point to an accessible directory. So there is a faint
3920 * chance that someone could execute a setuid script down in a
3921 * non-accessible directory. I don't know what to do about that.
3922 * But I don't think it's too important. The manual lies when
3923 * it says access() is useful in setuid programs.
3925 * So, access() is pretty useless... but not harmful... do anyway.
3927 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3928 Perl_croak(aTHX_ "Can't access() script\n");
3931 /* If we can swap euid and uid, then we can determine access rights
3932 * with a simple stat of the file, and then compare device and
3933 * inode to make sure we did stat() on the same file we opened.
3934 * Then we just have to make sure he or she can execute it.
3937 * As the script is opened by perl, not suidperl, we do not need to
3938 * care much about access rights.
3940 * The 'script changed' check is needed, or we can get lied to
3941 * about $0 with e.g.
3942 * suidperl /dev/fd/4//bin/x 4<setuidscript
3943 * Without HAS_SETREUID, is it safe to stat() as root?
3945 * Are there any operating systems that pass /dev/fd/xxx for setuid
3946 * scripts, as suggested/described in perlsec(1)? Surely they do not
3947 * pass the script name as we do, so the "script changed" test would
3948 * fail for them... but we never get here with
3949 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3951 * This is one place where we must "lie" about return status: not
3952 * say if the stat() failed. We are doing this as root, and could
3953 * be tricked into reporting existence or not of files that the
3954 * "plain" user cannot even see.
3958 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3959 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3960 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3961 Perl_croak(aTHX_ "Setuid script changed\n");
3965 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3966 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3969 * We used to do this check as the "plain" user (after swapping
3970 * UIDs). But the check for nosuid and noexec filesystem is needed,
3971 * and should be done even without HAS_SETREUID. (Maybe those
3972 * operating systems do not have such mount options anyway...)
3973 * Seems safe enough to do as root.
3975 # if !defined(NO_NOSUID_CHECK)
3976 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3977 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3980 # endif /* IAMSUID */
3982 if (!S_ISREG(PL_statbuf.st_mode)) {
3983 Perl_croak(aTHX_ "Setuid script not plain file\n");
3985 if (PL_statbuf.st_mode & S_IWOTH)
3986 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3987 PL_doswitches = FALSE; /* -s is insecure in suid */
3988 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3989 CopLINE_inc(PL_curcop);
3990 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3991 Perl_croak(aTHX_ "No #! line");
3992 linestr = SvPV_nolen_const(linestr_sv);
3993 /* required even on Sys V */
3994 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3995 Perl_croak(aTHX_ "No #! line");
3999 /* Sanity check on line length */
4000 s_end = s + strlen(s);
4001 if (s_end == s || (s_end - s) > 4000)
4002 Perl_croak(aTHX_ "Very long #! line");
4003 /* Allow more than a single space after #! */
4004 while (isSPACE(*s)) s++;
4005 /* Sanity check on buffer end */
4006 while ((*s) && !isSPACE(*s)) s++;
4007 for (s2 = s; (s2 > linestr &&
4008 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4009 || s2[-1] == '-')); s2--) ;
4010 /* Sanity check on buffer start */
4011 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4012 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4013 Perl_croak(aTHX_ "Not a perl script");
4014 while (*s == ' ' || *s == '\t') s++;
4016 * #! arg must be what we saw above. They can invoke it by
4017 * mentioning suidperl explicitly, but they may not add any strange
4018 * arguments beyond what #! says if they do invoke suidperl that way.
4021 * The way validarg was set up, we rely on the kernel to start
4022 * scripts with argv[1] set to contain all #! line switches (the
4026 * Check that we got all the arguments listed in the #! line (not
4027 * just that there are no extraneous arguments). Might not matter
4028 * much, as switches from #! line seem to be acted upon (also), and
4029 * so may be checked and trapped in perl. But, security checks must
4030 * be done in suidperl and not deferred to perl. Note that suidperl
4031 * does not get around to parsing (and checking) the switches on
4032 * the #! line (but execs perl sooner).
4033 * Allow (require) a trailing newline (which may be of two
4034 * characters on some architectures?) (but no other trailing
4037 len = strlen(validarg);
4038 if (strEQ(validarg," PHOOEY ") ||
4039 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4040 !((s_end - s) == len+1
4041 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4042 Perl_croak(aTHX_ "Args must match #! line");
4046 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4047 PL_euid == PL_statbuf.st_uid)
4049 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4050 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4051 # endif /* IAMSUID */
4054 PL_euid) { /* oops, we're not the setuid root perl */
4056 * When root runs a setuid script, we do not go through the same
4057 * steps of execing sperl and then perl with fd scripts, but
4058 * simply set up UIDs within the same perl invocation; so do
4059 * not have the same checks (on options, whatever) that we have
4060 * for plain users. No problem really: would have to be a script
4061 * that does not actually work for plain users; and if root is
4062 * foolish and can be persuaded to run such an unsafe script, he
4063 * might run also non-setuid ones, and deserves what he gets.
4065 * Or, we might drop the PL_euid check above (and rely just on
4066 * fdscript to avoid loops), and do the execs
4072 * Pass fd script to suidperl.
4073 * Exec suidperl, substituting fd script for scriptname.
4074 * Pass script name as "subdir" of fd, which perl will grok;
4075 * in fact will use that to distinguish this from "normal"
4076 * usage, see comments above.
4078 PerlIO_rewind(rsfp);
4079 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4080 /* PSz 27 Feb 04 Sanity checks on scriptname */
4081 if ((!scriptname) || (!*scriptname) ) {
4082 Perl_croak(aTHX_ "No setuid script name\n");
4084 if (*scriptname == '-') {
4085 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4086 /* Or we might confuse it with an option when replacing
4087 * name in argument list, below (though we do pointer, not
4088 * string, comparisons).
4091 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4092 if (!PL_origargv[which]) {
4093 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4095 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4096 PerlIO_fileno(rsfp), PL_origargv[which]));
4097 # if defined(HAS_FCNTL) && defined(F_SETFD)
4098 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4101 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4102 (int)PERL_REVISION, (int)PERL_VERSION,
4103 (int)PERL_SUBVERSION), PL_origargv);
4105 # endif /* IAMSUID */
4106 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4109 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4111 * This seems back to front: we try HAS_SETEGID first; if not available
4112 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4113 * in the sense that we only want to set EGID; but are there any machines
4114 * with either of the latter, but not the former? Same with UID, later.
4117 (void)setegid(PL_statbuf.st_gid);
4119 # ifdef HAS_SETREGID
4120 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4122 # ifdef HAS_SETRESGID
4123 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4125 PerlProc_setgid(PL_statbuf.st_gid);
4129 if (PerlProc_getegid() != PL_statbuf.st_gid)
4130 Perl_croak(aTHX_ "Can't do setegid!\n");
4132 if (PL_statbuf.st_mode & S_ISUID) {
4133 if (PL_statbuf.st_uid != PL_euid)
4135 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4137 # ifdef HAS_SETREUID
4138 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4140 # ifdef HAS_SETRESUID
4141 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4143 PerlProc_setuid(PL_statbuf.st_uid);
4147 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4148 Perl_croak(aTHX_ "Can't do seteuid!\n");
4150 else if (PL_uid) { /* oops, mustn't run as root */
4152 (void)seteuid((Uid_t)PL_uid);
4154 # ifdef HAS_SETREUID
4155 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4157 # ifdef HAS_SETRESUID
4158 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4160 PerlProc_setuid((Uid_t)PL_uid);
4164 if (PerlProc_geteuid() != PL_uid)
4165 Perl_croak(aTHX_ "Can't do seteuid!\n");
4168 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4169 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4172 else if (fdscript < 0 || !suidscript)
4173 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4174 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4176 /* PSz 16 Sep 03 Keep neat error message */
4177 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4180 /* We absolutely must clear out any saved ids here, so we */
4181 /* exec the real perl, substituting fd script for scriptname. */
4182 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4184 * It might be thought that using setresgid and/or setresuid (changed to
4185 * set the saved IDs) above might obviate the need to exec, and we could
4186 * go on to "do the perl thing".
4188 * Is there such a thing as "saved GID", and is that set for setuid (but
4189 * not setgid) execution like suidperl? Without exec, it would not be
4190 * cleared for setuid (but not setgid) scripts (or might need a dummy
4193 * We need suidperl to do the exact same argument checking that perl
4194 * does. Thus it cannot be very small; while it could be significantly
4195 * smaller, it is safer (simpler?) to make it essentially the same
4196 * binary as perl (but they are not identical). - Maybe could defer that
4197 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4198 * but prefer to do thorough checks in suidperl itself. Such deferral
4199 * would make suidperl security rely on perl, a design no-no.
4201 * Setuid things should be short and simple, thus easy to understand and
4202 * verify. They should do their "own thing", without influence by
4203 * attackers. It may help if their internal execution flow is fixed,
4204 * regardless of platform: it may be best to exec anyway.
4206 * Suidperl should at least be conceptually simple: a wrapper only,
4207 * never to do any real perl. Maybe we should put
4209 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4211 * into the perly bits.
4213 PerlIO_rewind(rsfp);
4214 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4216 * Keep original arguments: suidperl already has fd script.
4218 # if defined(HAS_FCNTL) && defined(F_SETFD)
4219 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4222 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4223 (int)PERL_REVISION, (int)PERL_VERSION,
4224 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4226 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4227 # endif /* IAMSUID */
4232 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4233 /* Don't even need this function. */
4236 S_validate_suid(pTHX_ PerlIO *rsfp)
4238 PERL_ARGS_ASSERT_VALIDATE_SUID;
4240 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4241 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4242 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4243 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4245 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4248 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4249 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4250 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4251 /* not set-id, must be wrapped */
4254 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4258 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4262 register const char *s2;
4263 #ifdef MACOS_TRADITIONAL
4267 PERL_ARGS_ASSERT_FIND_BEGINNING;
4269 /* skip forward in input to the real script? */
4271 #ifdef MACOS_TRADITIONAL
4272 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4274 while (PL_doextract || gMacPerl_AlwaysExtract) {
4275 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4276 if (!gMacPerl_AlwaysExtract)
4277 Perl_croak(aTHX_ "No Perl script found in input\n");
4279 if (PL_doextract) /* require explicit override ? */
4280 if (!OverrideExtract(PL_origfilename))
4281 Perl_croak(aTHX_ "User aborted script\n");
4283 PL_doextract = FALSE;
4285 /* Pater peccavi, file does not have #! */
4286 PerlIO_rewind(rsfp);
4291 while (PL_doextract) {
4292 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4293 Perl_croak(aTHX_ "No Perl script found in input\n");
4296 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4297 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4298 PL_doextract = FALSE;
4299 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4301 while (*s == ' ' || *s == '\t') s++;
4303 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4304 || s2[-1] == '_') s2--;
4305 if (strnEQ(s2-4,"perl",4))
4306 while ((s = moreswitches(s)))
4309 #ifdef MACOS_TRADITIONAL
4310 /* We are always searching for the #!perl line in MacPerl,
4311 * so if we find it, still keep the line count correct
4312 * by counting lines we already skipped over
4314 for (; maclines > 0 ; maclines--)
4315 PerlIO_ungetc(rsfp, '\n');
4319 /* gMacPerl_AlwaysExtract is false in MPW tool */
4320 } else if (gMacPerl_AlwaysExtract) {
4332 PL_uid = PerlProc_getuid();
4333 PL_euid = PerlProc_geteuid();
4334 PL_gid = PerlProc_getgid();
4335 PL_egid = PerlProc_getegid();
4337 PL_uid |= PL_gid << 16;
4338 PL_euid |= PL_egid << 16;
4340 /* Should not happen: */
4341 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4342 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4345 * Should go by suidscript, not uid!=euid: why disallow
4346 * system("ls") in scripts run from setuid things?
4347 * Or, is this run before we check arguments and set suidscript?
4348 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4349 * (We never have suidscript, can we be sure to have fdscript?)
4350 * Or must then go by UID checks? See comments in forbid_setid also.
4354 /* This is used very early in the lifetime of the program,
4355 * before even the options are parsed, so PL_tainting has
4356 * not been initialized properly. */
4358 Perl_doing_taint(int argc, char *argv[], char *envp[])
4360 #ifndef PERL_IMPLICIT_SYS
4361 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4362 * before we have an interpreter-- and the whole point of this
4363 * function is to be called at such an early stage. If you are on
4364 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4365 * "tainted because running with altered effective ids', you'll
4366 * have to add your own checks somewhere in here. The two most
4367 * known samples of 'implicitness' are Win32 and NetWare, neither
4368 * of which has much of concept of 'uids'. */
4369 int uid = PerlProc_getuid();
4370 int euid = PerlProc_geteuid();
4371 int gid = PerlProc_getgid();
4372 int egid = PerlProc_getegid();
4379 if (uid && (euid != uid || egid != gid))
4381 #endif /* !PERL_IMPLICIT_SYS */
4382 /* This is a really primitive check; environment gets ignored only
4383 * if -T are the first chars together; otherwise one gets
4384 * "Too late" message. */
4385 if ( argc > 1 && argv[1][0] == '-'
4386 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4391 /* Passing the flag as a single char rather than a string is a slight space
4392 optimisation. The only message that isn't /^-.$/ is
4393 "program input from stdin", which is substituted in place of '\0', which
4394 could never be a command line flag. */
4396 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4399 char string[3] = "-x";
4400 const char *message = "program input from stdin";
4407 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4408 if (PL_euid != PL_uid)
4409 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4410 if (PL_egid != PL_gid)
4411 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4412 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4414 * Checks for UID/GID above "wrong": why disallow
4415 * perl -e 'print "Hello\n"'
4416 * from within setuid things?? Simply drop them: replaced by
4417 * fdscript/suidscript and #ifdef IAMSUID checks below.
4419 * This may be too late for command-line switches. Will catch those on
4420 * the #! line, after finding the script name and setting up
4421 * fdscript/suidscript. Note that suidperl does not get around to
4422 * parsing (and checking) the switches on the #! line, but checks that
4423 * the two sets are identical.
4425 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4426 * instead, or would that be "too late"? (We never have suidscript, can
4427 * we be sure to have fdscript?)
4429 * Catch things with suidscript (in descendant of suidperl), even with
4430 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4431 * below; but I am paranoid.
4433 * Also see comments about root running a setuid script, elsewhere.
4436 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4438 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4439 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4440 #endif /* IAMSUID */
4444 Perl_init_debugger(pTHX)
4447 HV * const ostash = PL_curstash;
4449 PL_curstash = PL_debstash;
4450 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4452 AvREAL_off(PL_dbargs);
4453 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4454 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4455 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4456 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4457 sv_setiv(PL_DBsingle, 0);
4458 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4459 sv_setiv(PL_DBtrace, 0);
4460 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4461 sv_setiv(PL_DBsignal, 0);
4462 PL_curstash = ostash;
4465 #ifndef STRESS_REALLOC
4466 #define REASONABLE(size) (size)
4468 #define REASONABLE(size) (1) /* unreasonable */
4472 Perl_init_stacks(pTHX)
4475 /* start with 128-item stack and 8K cxstack */
4476 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4477 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4478 PL_curstackinfo->si_type = PERLSI_MAIN;
4479 PL_curstack = PL_curstackinfo->si_stack;
4480 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4482 PL_stack_base = AvARRAY(PL_curstack);
4483 PL_stack_sp = PL_stack_base;
4484 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4486 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4489 PL_tmps_max = REASONABLE(128);
4491 Newx(PL_markstack,REASONABLE(32),I32);
4492 PL_markstack_ptr = PL_markstack;
4493 PL_markstack_max = PL_markstack + REASONABLE(32);
4497 Newx(PL_scopestack,REASONABLE(32),I32);
4498 PL_scopestack_ix = 0;
4499 PL_scopestack_max = REASONABLE(32);
4501 Newx(PL_savestack,REASONABLE(128),ANY);
4502 PL_savestack_ix = 0;
4503 PL_savestack_max = REASONABLE(128);
4512 while (PL_curstackinfo->si_next)
4513 PL_curstackinfo = PL_curstackinfo->si_next;
4514 while (PL_curstackinfo) {
4515 PERL_SI *p = PL_curstackinfo->si_prev;
4516 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4517 Safefree(PL_curstackinfo->si_cxstack);
4518 Safefree(PL_curstackinfo);
4519 PL_curstackinfo = p;
4521 Safefree(PL_tmps_stack);
4522 Safefree(PL_markstack);
4523 Safefree(PL_scopestack);
4524 Safefree(PL_savestack);
4529 S_init_predump_symbols(pTHX)
4535 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4536 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4537 GvMULTI_on(PL_stdingv);
4538 io = GvIOp(PL_stdingv);
4539 IoTYPE(io) = IoTYPE_RDONLY;
4540 IoIFP(io) = PerlIO_stdin();
4541 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4543 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4545 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4548 IoTYPE(io) = IoTYPE_WRONLY;
4549 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4551 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4553 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4555 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4556 GvMULTI_on(PL_stderrgv);
4557 io = GvIOp(PL_stderrgv);
4558 IoTYPE(io) = IoTYPE_WRONLY;
4559 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4560 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4562 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4564 PL_statname = newSV(0); /* last filename we did stat on */
4566 Safefree(PL_osname);
4567 PL_osname = savepv(OSNAME);
4571 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4575 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4577 argc--,argv++; /* skip name of script */
4578 if (PL_doswitches) {
4579 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4583 if (argv[0][1] == '-' && !argv[0][2]) {
4587 if ((s = strchr(argv[0], '='))) {
4588 const char *const start_name = argv[0] + 1;
4589 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4590 TRUE, SVt_PV)), s + 1);
4593 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4596 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4597 GvMULTI_on(PL_argvgv);
4598 (void)gv_AVadd(PL_argvgv);
4599 av_clear(GvAVn(PL_argvgv));
4600 for (; argc > 0; argc--,argv++) {
4601 SV * const sv = newSVpv(argv[0],0);
4602 av_push(GvAVn(PL_argvgv),sv);
4603 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4604 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4607 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4608 (void)sv_utf8_decode(sv);
4614 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4619 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4621 PL_toptarget = newSV_type(SVt_PVFM);
4622 sv_setpvn(PL_toptarget, "", 0);
4623 PL_bodytarget = newSV_type(SVt_PVFM);
4624 sv_setpvn(PL_bodytarget, "", 0);
4625 PL_formtarget = PL_bodytarget;
4629 init_argv_symbols(argc,argv);
4631 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4632 #ifdef MACOS_TRADITIONAL
4633 /* $0 is not majick on a Mac */
4634 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4636 sv_setpv(GvSV(tmpgv),PL_origfilename);
4637 magicname("0", "0", 1);
4640 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4642 bool env_is_not_environ;
4643 GvMULTI_on(PL_envgv);
4644 hv = GvHVn(PL_envgv);
4645 hv_magic(hv, NULL, PERL_MAGIC_env);
4647 #ifdef USE_ENVIRON_ARRAY
4648 /* Note that if the supplied env parameter is actually a copy
4649 of the global environ then it may now point to free'd memory
4650 if the environment has been modified since. To avoid this
4651 problem we treat env==NULL as meaning 'use the default'
4655 env_is_not_environ = env != environ;
4656 if (env_is_not_environ
4657 # ifdef USE_ITHREADS
4658 && PL_curinterp == aTHX
4667 for (; *env; env++) {
4668 if (!(s = strchr(*env,'=')) || s == *env)
4670 #if defined(MSDOS) && !defined(DJGPP)
4675 sv = newSVpv(s+1, 0);
4676 (void)hv_store(hv, *env, s - *env, sv, 0);
4677 if (env_is_not_environ)
4681 #endif /* USE_ENVIRON_ARRAY */
4682 #endif /* !PERL_MICRO */
4685 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4686 SvREADONLY_off(GvSV(tmpgv));
4687 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4688 SvREADONLY_on(GvSV(tmpgv));
4690 #ifdef THREADS_HAVE_PIDS
4691 PL_ppid = (IV)getppid();
4694 /* touch @F array to prevent spurious warnings 20020415 MJD */
4696 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4701 S_init_perllib(pTHX)
4707 s = PerlEnv_getenv("PERL5LIB");
4709 * It isn't possible to delete an environment variable with
4710 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4711 * case we treat PERL5LIB as undefined if it has a zero-length value.
4713 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4714 if (s && *s != '\0')
4718 incpush(s, TRUE, TRUE, TRUE, FALSE);
4720 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4722 /* Treat PERL5?LIB as a possible search list logical name -- the
4723 * "natural" VMS idiom for a Unix path string. We allow each
4724 * element to be a set of |-separated directories for compatibility.
4728 if (my_trnlnm("PERL5LIB",buf,0))
4729 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4731 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4735 /* Use the ~-expanded versions of APPLLIB (undocumented),
4736 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4739 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4743 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4745 #ifdef MACOS_TRADITIONAL
4748 SV * privdir = newSV(0);
4749 char * macperl = PerlEnv_getenv("MACPERL");
4754 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4755 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4756 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4757 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4758 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4759 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4761 SvREFCNT_dec(privdir);
4764 incpush(":", FALSE, FALSE, TRUE, FALSE);
4767 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4770 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4772 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4776 /* sitearch is always relative to sitelib on Windows for
4777 * DLL-based path intuition to work correctly */
4778 # if !defined(WIN32)
4779 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4785 /* this picks up sitearch as well */
4786 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4788 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4792 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4793 /* Search for version-specific dirs below here */
4794 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4797 #ifdef PERL_VENDORARCH_EXP
4798 /* vendorarch is always relative to vendorlib on Windows for
4799 * DLL-based path intuition to work correctly */
4800 # if !defined(WIN32)
4801 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4805 #ifdef PERL_VENDORLIB_EXP
4807 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4809 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4813 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4814 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4817 #ifdef PERL_OTHERLIBDIRS
4818 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4822 incpush(".", FALSE, FALSE, TRUE, FALSE);
4823 #endif /* MACOS_TRADITIONAL */
4826 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4827 # define PERLLIB_SEP ';'
4830 # define PERLLIB_SEP '|'
4832 # if defined(MACOS_TRADITIONAL)
4833 # define PERLLIB_SEP ','
4835 # define PERLLIB_SEP ':'
4839 #ifndef PERLLIB_MANGLE
4840 # define PERLLIB_MANGLE(s,n) (s)
4843 /* Push a directory onto @INC if it exists.
4844 Generate a new SV if we do this, to save needing to copy the SV we push
4847 S_incpush_if_exists(pTHX_ SV *dir)
4852 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4854 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4855 S_ISDIR(tmpstatbuf.st_mode)) {
4856 av_push(GvAVn(PL_incgv), dir);
4863 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4868 const char *p = dir;
4873 if (addsubdirs || addoldvers) {
4877 /* Break at all separators */
4879 SV *libdir = newSV(0);
4882 /* skip any consecutive separators */
4884 while ( *p == PERLLIB_SEP ) {
4885 /* Uncomment the next line for PATH semantics */
4886 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4891 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4892 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4897 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4898 p = NULL; /* break out */
4900 #ifdef MACOS_TRADITIONAL
4901 if (!strchr(SvPVX(libdir), ':')) {
4904 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4906 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4907 sv_catpvs(libdir, ":");
4910 /* Do the if() outside the #ifdef to avoid warnings about an unused
4913 #ifdef PERL_RELOCATABLE_INC
4915 * Relocatable include entries are marked with a leading .../
4918 * 0: Remove that leading ".../"
4919 * 1: Remove trailing executable name (anything after the last '/')
4920 * from the perl path to give a perl prefix
4922 * While the @INC element starts "../" and the prefix ends with a real
4923 * directory (ie not . or ..) chop that real directory off the prefix
4924 * and the leading "../" from the @INC element. ie a logical "../"
4926 * Finally concatenate the prefix and the remainder of the @INC element
4927 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4928 * generates /usr/local/lib/perl5
4930 const char *libpath = SvPVX(libdir);
4931 STRLEN libpath_len = SvCUR(libdir);
4932 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4934 SV * const caret_X = get_sv("\030", 0);
4935 /* Going to use the SV just as a scratch buffer holding a C
4941 /* $^X is *the* source of taint if tainting is on, hence
4942 SvPOK() won't be true. */
4944 assert(SvPOKp(caret_X));
4945 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4947 /* Firstly take off the leading .../
4948 If all else fail we'll do the paths relative to the current
4950 sv_chop(libdir, libpath + 4);
4951 /* Don't use SvPV as we're intentionally bypassing taining,
4952 mortal copies that the mg_get of tainting creates, and
4953 corruption that seems to come via the save stack.
4954 I guess that the save stack isn't correctly set up yet. */
4955 libpath = SvPVX(libdir);
4956 libpath_len = SvCUR(libdir);
4958 /* This would work more efficiently with memrchr, but as it's
4959 only a GNU extension we'd need to probe for it and
4960 implement our own. Not hard, but maybe not worth it? */
4962 prefix = SvPVX(prefix_sv);
4963 lastslash = strrchr(prefix, '/');
4965 /* First time in with the *lastslash = '\0' we just wipe off
4966 the trailing /perl from (say) /usr/foo/bin/perl
4970 while ((*lastslash = '\0'), /* Do that, come what may. */
4971 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4972 && (lastslash = strrchr(prefix, '/')))) {
4973 if (lastslash[1] == '\0'
4974 || (lastslash[1] == '.'
4975 && (lastslash[2] == '/' /* ends "/." */
4976 || (lastslash[2] == '/'
4977 && lastslash[3] == '/' /* or "/.." */
4979 /* Prefix ends "/" or "/." or "/..", any of which
4980 are fishy, so don't do any more logical cleanup.
4984 /* Remove leading "../" from path */
4987 /* Next iteration round the loop removes the last
4988 directory name from prefix by writing a '\0' in
4989 the while clause. */
4991 /* prefix has been terminated with a '\0' to the correct
4992 length. libpath points somewhere into the libdir SV.
4993 We need to join the 2 with '/' and drop the result into
4995 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4996 SvREFCNT_dec(libdir);
4997 /* And this is the new libdir. */
5000 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5001 /* Need to taint reloccated paths if running set ID */
5002 SvTAINTED_on(libdir);
5005 SvREFCNT_dec(prefix_sv);
5010 * BEFORE pushing libdir onto @INC we may first push version- and
5011 * archname-specific sub-directories.
5013 if (addsubdirs || addoldvers) {
5014 #ifdef PERL_INC_VERSION_LIST
5015 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5016 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5017 const char * const *incver;
5023 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5025 while (unix[len-1] == '/') len--; /* Cosmetic */
5026 sv_usepvn(libdir,unix,len);
5029 PerlIO_printf(Perl_error_log,
5030 "Failed to unixify @INC element \"%s\"\n",
5034 #ifdef MACOS_TRADITIONAL
5035 #define PERL_AV_SUFFIX_FMT ""
5036 #define PERL_ARCH_FMT "%s:"
5037 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5039 #define PERL_AV_SUFFIX_FMT "/"
5040 #define PERL_ARCH_FMT "/%s"
5041 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5043 /* .../version/archname if -d .../version/archname */
5044 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5046 (int)PERL_REVISION, (int)PERL_VERSION,
5047 (int)PERL_SUBVERSION, ARCHNAME);
5048 subdir = S_incpush_if_exists(aTHX_ subdir);
5050 /* .../version if -d .../version */
5051 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5053 (int)PERL_REVISION, (int)PERL_VERSION,
5054 (int)PERL_SUBVERSION);
5055 subdir = S_incpush_if_exists(aTHX_ subdir);
5057 /* .../archname if -d .../archname */
5058 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5059 SVfARG(libdir), ARCHNAME);
5060 subdir = S_incpush_if_exists(aTHX_ subdir);
5064 #ifdef PERL_INC_VERSION_LIST
5066 for (incver = incverlist; *incver; incver++) {
5067 /* .../xxx if -d .../xxx */
5068 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5069 SVfARG(libdir), *incver);
5070 subdir = S_incpush_if_exists(aTHX_ subdir);
5076 /* finally push this lib directory on the end of @INC */
5077 av_push(GvAVn(PL_incgv), libdir);
5080 assert (SvREFCNT(subdir) == 1);
5081 SvREFCNT_dec(subdir);
5087 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5091 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5097 PERL_ARGS_ASSERT_CALL_LIST;
5099 while (av_len(paramList) >= 0) {
5100 cv = (CV*)av_shift(paramList);
5102 if (paramList == PL_beginav) {
5103 /* save PL_beginav for compiler */
5104 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5106 else if (paramList == PL_checkav) {
5107 /* save PL_checkav for compiler */
5108 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5110 else if (paramList == PL_unitcheckav) {
5111 /* save PL_unitcheckav for compiler */
5112 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5123 PL_madskills |= 16384;
5128 PL_madskills &= ~16384;
5131 (void)SvPV_const(atsv, len);
5133 PL_curcop = &PL_compiling;
5134 CopLINE_set(PL_curcop, oldline);
5135 if (paramList == PL_beginav)
5136 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5138 Perl_sv_catpvf(aTHX_ atsv,
5139 "%s failed--call queue aborted",
5140 paramList == PL_checkav ? "CHECK"
5141 : paramList == PL_initav ? "INIT"
5142 : paramList == PL_unitcheckav ? "UNITCHECK"
5144 while (PL_scopestack_ix > oldscope)
5147 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5154 /* my_exit() was called */
5155 while (PL_scopestack_ix > oldscope)
5158 PL_curstash = PL_defstash;
5159 PL_curcop = &PL_compiling;
5160 CopLINE_set(PL_curcop, oldline);
5162 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5163 if (paramList == PL_beginav)
5164 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5166 Perl_croak(aTHX_ "%s failed--call queue aborted",
5167 paramList == PL_checkav ? "CHECK"
5168 : paramList == PL_initav ? "INIT"
5169 : paramList == PL_unitcheckav ? "UNITCHECK"
5176 PL_curcop = &PL_compiling;
5177 CopLINE_set(PL_curcop, oldline);
5180 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5189 Perl_my_exit(pTHX_ U32 status)
5200 STATUS_EXIT_SET(status);
5207 Perl_my_failure_exit(pTHX)
5211 /* We have been called to fall on our sword. The desired exit code
5212 * should be already set in STATUS_UNIX, but could be shifted over
5213 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5216 * If an error code has not been set, then force the issue.
5218 if (MY_POSIX_EXIT) {
5220 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5221 * the exit code when there isn't an error.
5224 if (STATUS_UNIX == 0)
5225 STATUS_UNIX_EXIT_SET(255);
5227 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5229 /* The exit code could have been set by $? or vmsish which
5230 * means that it may not be fatal. So convert
5231 * success/warning codes to fatal.
5233 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5234 STATUS_UNIX_EXIT_SET(255);
5238 /* Traditionally Perl on VMS always expects a Fatal Error. */
5239 if (vaxc$errno & 1) {
5241 /* So force success status to failure */
5242 if (STATUS_NATIVE & 1)
5247 STATUS_UNIX = EINTR; /* In case something cares */
5252 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5254 /* Encode the severity code */
5255 severity = STATUS_NATIVE & STS$M_SEVERITY;
5256 STATUS_UNIX = (severity ? severity : 1) << 8;
5258 /* Perl expects this to be a fatal error */
5259 if (severity != STS$K_SEVERE)
5268 STATUS_UNIX_SET(errno);
5270 exitstatus = STATUS_UNIX >> 8;
5271 if (exitstatus & 255)
5272 STATUS_UNIX_SET(exitstatus);
5274 STATUS_UNIX_SET(255);
5281 S_my_exit_jump(pTHX)
5286 SvREFCNT_dec(PL_e_script);
5290 POPSTACK_TO(PL_mainstack);
5298 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5301 const char * const p = SvPVX_const(PL_e_script);
5302 const char *nl = strchr(p, '\n');
5304 PERL_UNUSED_ARG(idx);
5305 PERL_UNUSED_ARG(maxlen);
5307 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5309 filter_del(read_e_script);
5312 sv_catpvn(buf_sv, p, nl-p);
5313 sv_chop(PL_e_script, nl);
5319 * c-indentation-style: bsd
5321 * indent-tabs-mode: t
5324 * ex: set ts=8 sts=4 sw=4 noet: