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);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
184 #ifdef PERL_IMPLICIT_SYS
186 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
187 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
188 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
189 struct IPerlDir* ipD, struct IPerlSock* ipS,
190 struct IPerlProc* ipP)
192 PerlInterpreter *my_perl;
193 /* Newx() needs interpreter, so call malloc() instead */
194 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 Zero(my_perl, 1, PerlInterpreter);
206 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
213 =head1 Embedding Functions
215 =for apidoc perl_alloc
217 Allocates a new Perl interpreter. See L<perlembed>.
225 PerlInterpreter *my_perl;
227 /* Newx() needs interpreter, so call malloc() instead */
228 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
230 S_init_tls_and_interp(my_perl);
231 #ifndef PERL_TRACK_MEMPOOL
232 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
234 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
239 #endif /* PERL_IMPLICIT_SYS */
242 =for apidoc perl_construct
244 Initializes a new Perl interpreter. See L<perlembed>.
250 perl_construct(pTHXx)
253 PERL_UNUSED_ARG(my_perl);
256 PL_perl_destruct_level = 1;
258 if (PL_perl_destruct_level > 0)
261 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
263 /* set read-only and try to insure than we wont see REFCNT==0
266 SvREADONLY_on(&PL_sv_undef);
267 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
269 sv_setpv(&PL_sv_no,PL_No);
270 /* value lookup in void context - happens to have the side effect
271 of caching the numeric forms. */
274 SvREADONLY_on(&PL_sv_no);
275 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
277 sv_setpv(&PL_sv_yes,PL_Yes);
280 SvREADONLY_on(&PL_sv_yes);
281 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
283 SvREADONLY_on(&PL_sv_placeholder);
284 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
286 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
287 #ifdef PERL_USES_PL_PIDSTATUS
288 PL_pidstatus = newHV();
291 PL_rs = newSVpvs("\n");
301 SET_NUMERIC_STANDARD();
303 #if defined(LOCAL_PATCH_COUNT)
304 PL_localpatches = local_patches; /* For possible -v */
307 #ifdef HAVE_INTERP_INTERN
311 PerlIO_init(aTHX); /* Hook to IO system */
313 PL_fdpid = newAV(); /* for remembering popen pids by fd */
314 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
315 PL_errors = newSVpvs("");
316 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
317 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
318 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
320 /* First entry is an array of empty elements */
321 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
322 PL_regex_pad = AvARRAY(PL_regex_padav);
324 #ifdef USE_REENTRANT_API
325 Perl_reentrant_init(aTHX);
328 /* Note that strtab is a rather special HV. Assumptions are made
329 about not iterating on it, and not adding tie magic to it.
330 It is properly deallocated in perl_destruct() */
333 HvSHAREKEYS_off(PL_strtab); /* mandatory */
334 hv_ksplit(PL_strtab, 512);
336 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
337 _dyld_lookup_and_bind
338 ("__environ", (unsigned long *) &environ_pointer, NULL);
342 # ifdef USE_ENVIRON_ARRAY
343 PL_origenviron = environ;
347 /* Use sysconf(_SC_CLK_TCK) if available, if not
348 * available or if the sysconf() fails, use the HZ.
349 * BeOS has those, but returns the wrong value.
350 * The HZ if not originally defined has been by now
351 * been defined as CLK_TCK, if available. */
352 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
353 PL_clocktick = sysconf(_SC_CLK_TCK);
354 if (PL_clocktick <= 0)
358 PL_stashcache = newHV();
360 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
361 (int)PERL_VERSION, (int)PERL_SUBVERSION);
364 if (!PL_mmap_page_size) {
365 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
367 SETERRNO(0, SS_NORMAL);
369 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
371 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
373 if ((long) PL_mmap_page_size < 0) {
375 SV * const error = ERRSV;
376 SvUPGRADE(error, SVt_PV);
377 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
380 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
384 # ifdef HAS_GETPAGESIZE
385 PL_mmap_page_size = getpagesize();
387 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
388 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
392 if (PL_mmap_page_size <= 0)
393 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
394 (IV) PL_mmap_page_size);
396 #endif /* HAS_MMAP */
398 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
399 PL_timesbase.tms_utime = 0;
400 PL_timesbase.tms_stime = 0;
401 PL_timesbase.tms_cutime = 0;
402 PL_timesbase.tms_cstime = 0;
409 =for apidoc nothreadhook
411 Stub that provides thread hook for perl_destruct when there are
418 Perl_nothreadhook(pTHX)
424 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
426 Perl_dump_sv_child(pTHX_ SV *sv)
429 const int sock = PL_dumper_fd;
430 const int debug_fd = PerlIO_fileno(Perl_debug_log);
431 union control_un control;
434 struct cmsghdr *cmptr;
436 unsigned char buffer[256];
438 if(sock == -1 || debug_fd == -1)
441 PerlIO_flush(Perl_debug_log);
443 /* All these shenanigans are to pass a file descriptor over to our child for
444 it to dump out to. We can't let it hold open the file descriptor when it
445 forks, as the file descriptor it will dump to can turn out to be one end
446 of pipe that some other process will wait on for EOF. (So as it would
447 be open, the wait would be forever.) */
449 msg.msg_control = control.control;
450 msg.msg_controllen = sizeof(control.control);
451 /* We're a connected socket so we don't need a destination */
457 cmptr = CMSG_FIRSTHDR(&msg);
458 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
459 cmptr->cmsg_level = SOL_SOCKET;
460 cmptr->cmsg_type = SCM_RIGHTS;
461 *((int *)CMSG_DATA(cmptr)) = 1;
463 vec[0].iov_base = (void*)&sv;
464 vec[0].iov_len = sizeof(sv);
465 got = sendmsg(sock, &msg, 0);
468 perror("Debug leaking scalars parent sendmsg failed");
471 if(got < sizeof(sv)) {
472 perror("Debug leaking scalars parent short sendmsg");
476 /* Return protocol is
478 unsigned char: length of location string (0 for empty)
479 unsigned char*: string (not terminated)
481 vec[0].iov_base = (void*)&returned_errno;
482 vec[0].iov_len = sizeof(returned_errno);
483 vec[1].iov_base = buffer;
486 got = readv(sock, vec, 2);
489 perror("Debug leaking scalars parent read failed");
490 PerlIO_flush(PerlIO_stderr());
493 if(got < sizeof(returned_errno) + 1) {
494 perror("Debug leaking scalars parent short read");
495 PerlIO_flush(PerlIO_stderr());
500 got = read(sock, buffer + 1, *buffer);
502 perror("Debug leaking scalars parent read 2 failed");
503 PerlIO_flush(PerlIO_stderr());
508 perror("Debug leaking scalars parent short read 2");
509 PerlIO_flush(PerlIO_stderr());
514 if (returned_errno || *buffer) {
515 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
516 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
517 returned_errno, strerror(returned_errno));
523 =for apidoc perl_destruct
525 Shuts down a Perl interpreter. See L<perlembed>.
534 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
536 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
540 PERL_UNUSED_ARG(my_perl);
542 /* wait for all pseudo-forked children to finish */
543 PERL_WAIT_FOR_CHILDREN;
545 destruct_level = PL_perl_destruct_level;
548 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
550 const int i = atoi(s);
551 if (destruct_level < i)
557 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
563 if (PL_endav && !PL_minus_c)
564 call_list(PL_scopestack_ix, PL_endav);
570 /* Need to flush since END blocks can produce output */
573 if (CALL_FPTR(PL_threadhook)(aTHX)) {
574 /* Threads hook has vetoed further cleanup */
575 PL_veto_cleanup = TRUE;
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
580 if (destruct_level != 0) {
581 /* Fork here to create a child. Our child's job is to preserve the
582 state of scalars prior to destruction, so that we can instruct it
583 to dump any scalars that we later find have leaked.
584 There's no subtlety in this code - it assumes POSIX, and it doesn't
588 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
589 perror("Debug leaking scalars socketpair failed");
595 perror("Debug leaking scalars fork failed");
599 /* We are the child */
600 const int sock = fd[1];
601 const int debug_fd = PerlIO_fileno(Perl_debug_log);
604 /* Our success message is an integer 0, and a char 0 */
605 static const char success[sizeof(int) + 1];
609 /* We need to close all other file descriptors otherwise we end up
610 with interesting hangs, where the parent closes its end of a
611 pipe, and sits waiting for (another) child to terminate. Only
612 that child never terminates, because it never gets EOF, because
613 we also have the far end of the pipe open. We even need to
614 close the debugging fd, because sometimes it happens to be one
615 end of a pipe, and a process is waiting on the other end for
616 EOF. Normally it would be closed at some point earlier in
617 destruction, but if we happen to cause the pipe to remain open,
618 EOF never occurs, and we get an infinite hang. Hence all the
619 games to pass in a file descriptor if it's actually needed. */
621 f = sysconf(_SC_OPEN_MAX);
623 where = "sysconf failed";
634 union control_un control;
637 struct cmsghdr *cmptr;
641 msg.msg_control = control.control;
642 msg.msg_controllen = sizeof(control.control);
643 /* We're a connected socket so we don't need a source */
647 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
649 vec[0].iov_base = (void*)⌖
650 vec[0].iov_len = sizeof(target);
652 got = recvmsg(sock, &msg, 0);
657 where = "recv failed";
660 if(got < sizeof(target)) {
661 where = "short recv";
665 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
669 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
670 where = "wrong cmsg_len";
673 if(cmptr->cmsg_level != SOL_SOCKET) {
674 where = "wrong cmsg_level";
677 if(cmptr->cmsg_type != SCM_RIGHTS) {
678 where = "wrong cmsg_type";
682 got_fd = *(int*)CMSG_DATA(cmptr);
683 /* For our last little bit of trickery, put the file descriptor
684 back into Perl_debug_log, as if we never actually closed it
686 if(got_fd != debug_fd) {
687 if (dup2(got_fd, debug_fd) == -1) {
694 PerlIO_flush(Perl_debug_log);
696 got = write(sock, &success, sizeof(success));
699 where = "write failed";
702 if(got < sizeof(success)) {
703 where = "short write";
710 int send_errno = errno;
711 unsigned char length = (unsigned char) strlen(where);
712 struct iovec failure[3] = {
713 {(void*)&send_errno, sizeof(send_errno)},
715 {(void*)where, length}
717 int got = writev(sock, failure, 3);
718 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
719 in the parent if we try to read from the socketpair after the
720 child has exited, even if there was data to read.
721 So sleep a bit to give the parent a fighting chance of
724 _exit((got == -1) ? errno : 0);
728 PL_dumper_fd = fd[0];
733 /* We must account for everything. */
735 /* Destroy the main CV and syntax tree */
736 /* Do this now, because destroying ops can cause new SVs to be generated
737 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
738 PL_curcop to point to a valid op from which the filename structure
740 PL_curcop = &PL_compiling;
742 /* ensure comppad/curpad to refer to main's pad */
743 if (CvPADLIST(PL_main_cv)) {
744 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
746 op_free(PL_main_root);
749 PL_main_start = NULL;
750 SvREFCNT_dec(PL_main_cv);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
761 if (PL_sv_objcount) {
763 * Try to destruct global references. We do this first so that the
764 * destructors and destructees still exist. Some sv's might remain.
765 * Non-referenced objects are on their own.
769 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
770 PL_defoutgv = NULL; /* may have been freed */
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 /* jettison our possibly duplicated environment */
789 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
790 * so we certainly shouldn't free it here
793 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
794 if (environ != PL_origenviron && !PL_use_safe_putenv
796 /* only main thread can free environ[0] contents */
797 && PL_curinterp == aTHX
803 for (i = 0; environ[i]; i++)
804 safesysfree(environ[i]);
806 /* Must use safesysfree() when working with environ. */
807 safesysfree(environ);
809 environ = PL_origenviron;
812 #endif /* !PERL_MICRO */
814 if (destruct_level == 0) {
816 DEBUG_P(debprofdump());
818 #if defined(PERLIO_LAYERS)
819 /* No more IO - including error messages ! */
820 PerlIO_cleanup(aTHX);
823 CopFILE_free(&PL_compiling);
824 CopSTASH_free(&PL_compiling);
826 /* The exit() function will do everything that needs doing. */
830 /* reset so print() ends up where we expect */
834 /* the syntax tree is shared between clones
835 * so op_free(PL_main_root) only ReREFCNT_dec's
836 * REGEXPs in the parent interpreter
837 * we need to manually ReREFCNT_dec for the clones
840 I32 i = AvFILLp(PL_regex_padav) + 1;
841 SV * const * const ary = AvARRAY(PL_regex_padav);
844 SV * const resv = ary[--i];
846 if (SvFLAGS(resv) & SVf_BREAK) {
847 /* this is PL_reg_curpm, already freed
848 * flag is set in regexec.c:S_regtry
850 SvFLAGS(resv) &= ~SVf_BREAK;
852 else if(SvREPADTMP(resv)) {
853 SvREPADTMP_off(resv);
855 else if(SvIOKp(resv)) {
856 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
861 SvREFCNT_dec(PL_regex_padav);
862 PL_regex_padav = NULL;
866 SvREFCNT_dec((SV*) PL_stashcache);
867 PL_stashcache = NULL;
869 /* loosen bonds of global variables */
872 (void)PerlIO_close(PL_rsfp);
876 /* Filters for program text */
877 SvREFCNT_dec(PL_rsfp_filters);
878 PL_rsfp_filters = NULL;
881 Safefree(PL_splitstr);
886 PL_preprocess = FALSE;
892 PL_doswitches = FALSE;
893 PL_dowarn = G_WARN_OFF;
894 PL_doextract = FALSE;
895 PL_sawampersand = FALSE; /* must save all match strings */
898 Safefree(PL_inplace);
900 SvREFCNT_dec(PL_patchlevel);
903 SvREFCNT_dec(PL_e_script);
909 /* magical thingies */
911 SvREFCNT_dec(PL_ofs_sv); /* $, */
914 SvREFCNT_dec(PL_ors_sv); /* $\ */
917 SvREFCNT_dec(PL_rs); /* $/ */
920 Safefree(PL_osname); /* $^O */
923 SvREFCNT_dec(PL_statname);
927 /* defgv, aka *_ should be taken care of elsewhere */
929 /* clean up after study() */
930 SvREFCNT_dec(PL_lastscream);
931 PL_lastscream = NULL;
932 Safefree(PL_screamfirst);
934 Safefree(PL_screamnext);
938 Safefree(PL_efloatbuf);
942 /* startup and shutdown function lists */
943 SvREFCNT_dec(PL_beginav);
944 SvREFCNT_dec(PL_beginav_save);
945 SvREFCNT_dec(PL_endav);
946 SvREFCNT_dec(PL_checkav);
947 SvREFCNT_dec(PL_checkav_save);
948 SvREFCNT_dec(PL_unitcheckav);
949 SvREFCNT_dec(PL_unitcheckav_save);
950 SvREFCNT_dec(PL_initav);
952 PL_beginav_save = NULL;
955 PL_checkav_save = NULL;
956 PL_unitcheckav = NULL;
957 PL_unitcheckav_save = NULL;
960 /* shortcuts just get cleared */
969 PL_last_in_gv = NULL;
977 PL_DBassertion = NULL;
982 SvREFCNT_dec(PL_argvout_stack);
983 PL_argvout_stack = NULL;
985 SvREFCNT_dec(PL_modglobal);
987 SvREFCNT_dec(PL_preambleav);
988 PL_preambleav = NULL;
989 SvREFCNT_dec(PL_subname);
991 #ifdef PERL_USES_PL_PIDSTATUS
992 SvREFCNT_dec(PL_pidstatus);
995 SvREFCNT_dec(PL_toptarget);
997 SvREFCNT_dec(PL_bodytarget);
998 PL_bodytarget = NULL;
999 PL_formtarget = NULL;
1001 /* free locale stuff */
1002 #ifdef USE_LOCALE_COLLATE
1003 Safefree(PL_collation_name);
1004 PL_collation_name = NULL;
1007 #ifdef USE_LOCALE_NUMERIC
1008 Safefree(PL_numeric_name);
1009 PL_numeric_name = NULL;
1010 SvREFCNT_dec(PL_numeric_radix_sv);
1011 PL_numeric_radix_sv = NULL;
1014 /* clear utf8 character classes */
1015 SvREFCNT_dec(PL_utf8_alnum);
1016 SvREFCNT_dec(PL_utf8_alnumc);
1017 SvREFCNT_dec(PL_utf8_ascii);
1018 SvREFCNT_dec(PL_utf8_alpha);
1019 SvREFCNT_dec(PL_utf8_space);
1020 SvREFCNT_dec(PL_utf8_cntrl);
1021 SvREFCNT_dec(PL_utf8_graph);
1022 SvREFCNT_dec(PL_utf8_digit);
1023 SvREFCNT_dec(PL_utf8_upper);
1024 SvREFCNT_dec(PL_utf8_lower);
1025 SvREFCNT_dec(PL_utf8_print);
1026 SvREFCNT_dec(PL_utf8_punct);
1027 SvREFCNT_dec(PL_utf8_xdigit);
1028 SvREFCNT_dec(PL_utf8_mark);
1029 SvREFCNT_dec(PL_utf8_toupper);
1030 SvREFCNT_dec(PL_utf8_totitle);
1031 SvREFCNT_dec(PL_utf8_tolower);
1032 SvREFCNT_dec(PL_utf8_tofold);
1033 SvREFCNT_dec(PL_utf8_idstart);
1034 SvREFCNT_dec(PL_utf8_idcont);
1035 PL_utf8_alnum = NULL;
1036 PL_utf8_alnumc = NULL;
1037 PL_utf8_ascii = NULL;
1038 PL_utf8_alpha = NULL;
1039 PL_utf8_space = NULL;
1040 PL_utf8_cntrl = NULL;
1041 PL_utf8_graph = NULL;
1042 PL_utf8_digit = NULL;
1043 PL_utf8_upper = NULL;
1044 PL_utf8_lower = NULL;
1045 PL_utf8_print = NULL;
1046 PL_utf8_punct = NULL;
1047 PL_utf8_xdigit = NULL;
1048 PL_utf8_mark = NULL;
1049 PL_utf8_toupper = NULL;
1050 PL_utf8_totitle = NULL;
1051 PL_utf8_tolower = NULL;
1052 PL_utf8_tofold = NULL;
1053 PL_utf8_idstart = NULL;
1054 PL_utf8_idcont = NULL;
1056 if (!specialWARN(PL_compiling.cop_warnings))
1057 PerlMemShared_free(PL_compiling.cop_warnings);
1058 PL_compiling.cop_warnings = NULL;
1059 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1060 PL_compiling.cop_hints_hash = NULL;
1061 CopFILE_free(&PL_compiling);
1062 CopSTASH_free(&PL_compiling);
1064 /* Prepare to destruct main symbol table. */
1069 SvREFCNT_dec(PL_curstname);
1070 PL_curstname = NULL;
1072 /* clear queued errors */
1073 SvREFCNT_dec(PL_errors);
1076 SvREFCNT_dec(PL_isarev);
1079 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1080 if (PL_scopestack_ix != 0)
1081 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1082 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1083 (long)PL_scopestack_ix);
1084 if (PL_savestack_ix != 0)
1085 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1086 "Unbalanced saves: %ld more saves than restores\n",
1087 (long)PL_savestack_ix);
1088 if (PL_tmps_floor != -1)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1090 (long)PL_tmps_floor + 1);
1091 if (cxstack_ix != -1)
1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1093 (long)cxstack_ix + 1);
1096 /* Now absolutely destruct everything, somehow or other, loops or no. */
1097 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1098 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1100 /* the 2 is for PL_fdpid and PL_strtab */
1101 while (PL_sv_count > 2 && sv_clean_all())
1104 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1105 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1106 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1107 SvFLAGS(PL_strtab) |= SVt_PVHV;
1109 AvREAL_off(PL_fdpid); /* no surviving entries */
1110 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1113 #ifdef HAVE_INTERP_INTERN
1117 /* Destruct the global string table. */
1119 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1120 * so that sv_free() won't fail on them.
1121 * Now that the global string table is using a single hunk of memory
1122 * for both HE and HEK, we either need to explicitly unshare it the
1123 * correct way, or actually free things here.
1126 const I32 max = HvMAX(PL_strtab);
1127 HE * const * const array = HvARRAY(PL_strtab);
1128 HE *hent = array[0];
1131 if (hent && ckWARN_d(WARN_INTERNAL)) {
1132 HE * const next = HeNEXT(hent);
1133 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1134 "Unbalanced string table refcount: (%ld) for \"%s\"",
1135 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1142 hent = array[riter];
1147 HvARRAY(PL_strtab) = 0;
1148 HvTOTALKEYS(PL_strtab) = 0;
1149 HvFILL(PL_strtab) = 0;
1151 SvREFCNT_dec(PL_strtab);
1154 /* free the pointer tables used for cloning */
1155 ptr_table_free(PL_ptr_table);
1156 PL_ptr_table = (PTR_TBL_t*)NULL;
1159 /* free special SVs */
1161 SvREFCNT(&PL_sv_yes) = 0;
1162 sv_clear(&PL_sv_yes);
1163 SvANY(&PL_sv_yes) = NULL;
1164 SvFLAGS(&PL_sv_yes) = 0;
1166 SvREFCNT(&PL_sv_no) = 0;
1167 sv_clear(&PL_sv_no);
1168 SvANY(&PL_sv_no) = NULL;
1169 SvFLAGS(&PL_sv_no) = 0;
1173 for (i=0; i<=2; i++) {
1174 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1175 sv_clear(PERL_DEBUG_PAD(i));
1176 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1177 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1181 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1182 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1184 #ifdef DEBUG_LEAKING_SCALARS
1185 if (PL_sv_count != 0) {
1190 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1191 svend = &sva[SvREFCNT(sva)];
1192 for (sv = sva + 1; sv < svend; ++sv) {
1193 if (SvTYPE(sv) != SVTYPEMASK) {
1194 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1196 " refcnt=%"UVuf pTHX__FORMAT "\n"
1197 "\tallocated at %s:%d %s %s%s\n",
1198 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1199 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1201 sv->sv_debug_inpad ? "for" : "by",
1202 sv->sv_debug_optype ?
1203 PL_op_name[sv->sv_debug_optype]: "(none)",
1204 sv->sv_debug_cloned ? " (cloned)" : ""
1206 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1207 Perl_dump_sv_child(aTHX_ sv);
1213 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1217 /* Wait for up to 4 seconds for child to terminate.
1218 This seems to be the least effort way of timing out on reaping
1220 struct timeval waitfor = {4, 0};
1221 int sock = PL_dumper_fd;
1225 FD_SET(sock, &rset);
1226 select(sock + 1, &rset, NULL, NULL, &waitfor);
1227 waitpid(child, &status, WNOHANG);
1234 #ifdef PERL_DEBUG_READONLY_OPS
1240 #if defined(PERLIO_LAYERS)
1241 /* No more IO - including error messages ! */
1242 PerlIO_cleanup(aTHX);
1245 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1246 as currently layers use it rather than NULL as a marker
1247 for no arg - and will try and SvREFCNT_dec it.
1249 SvREFCNT(&PL_sv_undef) = 0;
1250 SvREADONLY_off(&PL_sv_undef);
1252 Safefree(PL_origfilename);
1253 PL_origfilename = NULL;
1254 Safefree(PL_reg_start_tmp);
1255 PL_reg_start_tmp = (char**)NULL;
1256 PL_reg_start_tmpl = 0;
1257 Safefree(PL_reg_curpm);
1258 Safefree(PL_reg_poscache);
1259 free_tied_hv_pool();
1260 Safefree(PL_op_mask);
1261 Safefree(PL_psig_ptr);
1262 PL_psig_ptr = (SV**)NULL;
1263 Safefree(PL_psig_name);
1264 PL_psig_name = (SV**)NULL;
1265 Safefree(PL_bitcount);
1267 Safefree(PL_psig_pend);
1268 PL_psig_pend = (int*)NULL;
1271 PL_tainting = FALSE;
1272 PL_taint_warn = FALSE;
1273 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1276 DEBUG_P(debprofdump());
1278 #ifdef USE_REENTRANT_API
1279 Perl_reentrant_free(aTHX);
1284 while (PL_regmatch_slab) {
1285 regmatch_slab *s = PL_regmatch_slab;
1286 PL_regmatch_slab = PL_regmatch_slab->next;
1290 /* As the absolutely last thing, free the non-arena SV for mess() */
1293 /* we know that type == SVt_PVMG */
1295 /* it could have accumulated taint magic */
1298 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1299 moremagic = mg->mg_moremagic;
1300 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1302 Safefree(mg->mg_ptr);
1306 /* we know that type >= SVt_PV */
1307 SvPV_free(PL_mess_sv);
1308 Safefree(SvANY(PL_mess_sv));
1309 Safefree(PL_mess_sv);
1316 =for apidoc perl_free
1318 Releases a Perl interpreter. See L<perlembed>.
1328 if (PL_veto_cleanup)
1331 #ifdef PERL_TRACK_MEMPOOL
1334 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1335 * value as we're probably hunting memory leaks then
1337 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1338 if (!s || atoi(s) == 0) {
1339 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1340 thread at thread exit. */
1341 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1342 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1347 #if defined(WIN32) || defined(NETWARE)
1348 # if defined(PERL_IMPLICIT_SYS)
1351 void *host = nw_internal_host;
1353 void *host = w32_internal_host;
1355 PerlMem_free(aTHXx);
1357 nw_delete_internal_host(host);
1359 win32_delete_internal_host(host);
1363 PerlMem_free(aTHXx);
1366 PerlMem_free(aTHXx);
1370 #if defined(USE_ITHREADS)
1371 /* provide destructors to clean up the thread key when libperl is unloaded */
1372 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1374 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1375 #pragma fini "perl_fini"
1376 #elif defined(__sun) && !defined(__GNUC__)
1377 #pragma fini (perl_fini)
1381 #if defined(__GNUC__)
1382 __attribute__((destructor))
1387 if (PL_curinterp && !PL_veto_cleanup)
1392 #endif /* THREADS */
1395 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1398 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1399 PL_exitlist[PL_exitlistlen].fn = fn;
1400 PL_exitlist[PL_exitlistlen].ptr = ptr;
1404 #ifdef HAS_PROCSELFEXE
1405 /* This is a function so that we don't hold on to MAXPATHLEN
1406 bytes of stack longer than necessary
1409 S_procself_val(pTHX_ SV *sv, const char *arg0)
1411 char buf[MAXPATHLEN];
1412 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1414 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1415 includes a spurious NUL which will cause $^X to fail in system
1416 or backticks (this will prevent extensions from being built and
1417 many tests from working). readlink is not meant to add a NUL.
1418 Normal readlink works fine.
1420 if (len > 0 && buf[len-1] == '\0') {
1424 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1425 returning the text "unknown" from the readlink rather than the path
1426 to the executable (or returning an error from the readlink). Any valid
1427 path has a '/' in it somewhere, so use that to validate the result.
1428 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1430 if (len > 0 && memchr(buf, '/', len)) {
1431 sv_setpvn(sv,buf,len);
1437 #endif /* HAS_PROCSELFEXE */
1440 S_set_caret_X(pTHX) {
1442 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1444 #ifdef HAS_PROCSELFEXE
1445 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1448 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1450 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1457 =for apidoc perl_parse
1459 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1465 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1472 PERL_UNUSED_ARG(my_perl);
1474 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1477 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1478 setuid perl scripts securely.\n");
1479 #endif /* IAMSUID */
1482 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1483 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1484 * This MUST be done before any hash stores or fetches take place.
1485 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1486 * yourself, it is your responsibility to provide a good random seed!
1487 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1488 if (!PL_rehash_seed_set)
1489 PL_rehash_seed = get_hash_seed();
1491 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1493 if (s && (atoi(s) == 1))
1494 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1496 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1501 if (PL_origalen != 0) {
1502 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1505 /* Set PL_origalen be the sum of the contiguous argv[]
1506 * elements plus the size of the env in case that it is
1507 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1508 * as the maximum modifiable length of $0. In the worst case
1509 * the area we are able to modify is limited to the size of
1510 * the original argv[0]. (See below for 'contiguous', though.)
1512 const char *s = NULL;
1515 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1516 /* Do the mask check only if the args seem like aligned. */
1518 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1520 /* See if all the arguments are contiguous in memory. Note
1521 * that 'contiguous' is a loose term because some platforms
1522 * align the argv[] and the envp[]. If the arguments look
1523 * like non-aligned, assume that they are 'strictly' or
1524 * 'traditionally' contiguous. If the arguments look like
1525 * aligned, we just check that they are within aligned
1526 * PTRSIZE bytes. As long as no system has something bizarre
1527 * like the argv[] interleaved with some other data, we are
1528 * fine. (Did I just evoke Murphy's Law?) --jhi */
1529 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1531 for (i = 1; i < PL_origargc; i++) {
1532 if ((PL_origargv[i] == s + 1
1534 || PL_origargv[i] == s + 2
1539 (PL_origargv[i] > s &&
1541 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1552 #ifndef PERL_USE_SAFE_PUTENV
1553 /* Can we grab env area too to be used as the area for $0? */
1554 if (s && PL_origenviron && !PL_use_safe_putenv) {
1555 if ((PL_origenviron[0] == s + 1)
1558 (PL_origenviron[0] > s &&
1559 PL_origenviron[0] <=
1560 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1563 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1564 s = PL_origenviron[0];
1567 my_setenv("NoNe SuCh", NULL);
1568 /* Force copy of environment. */
1569 for (i = 1; PL_origenviron[i]; i++) {
1570 if (PL_origenviron[i] == s + 1
1573 (PL_origenviron[i] > s &&
1574 PL_origenviron[i] <=
1575 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1578 s = PL_origenviron[i];
1586 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1588 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1593 /* Come here if running an undumped a.out. */
1595 PL_origfilename = savepv(argv[0]);
1596 PL_do_undump = FALSE;
1597 cxstack_ix = -1; /* start label stack again */
1599 assert (!PL_tainted);
1601 S_set_caret_X(aTHX);
1603 init_postdump_symbols(argc,argv,env);
1608 op_free(PL_main_root);
1609 PL_main_root = NULL;
1611 PL_main_start = NULL;
1612 SvREFCNT_dec(PL_main_cv);
1616 oldscope = PL_scopestack_ix;
1617 PL_dowarn = G_WARN_OFF;
1622 parse_body(env,xsinit);
1624 call_list(oldscope, PL_unitcheckav);
1626 call_list(oldscope, PL_checkav);
1633 /* my_exit() was called */
1634 while (PL_scopestack_ix > oldscope)
1637 PL_curstash = PL_defstash;
1639 call_list(oldscope, PL_unitcheckav);
1641 call_list(oldscope, PL_checkav);
1645 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1654 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1658 int argc = PL_origargc;
1659 char **argv = PL_origargv;
1660 const char *scriptname = NULL;
1661 VOL bool dosearch = FALSE;
1662 const char *validarg = "";
1664 register char *s, c;
1665 const char *cddir = NULL;
1666 #ifdef USE_SITECUSTOMIZE
1667 bool minus_f = FALSE;
1669 SV *linestr_sv = newSV_type(SVt_PVIV);
1671 SvGROW(linestr_sv, 80);
1672 sv_setpvn(linestr_sv,"",0);
1674 sv = newSVpvs(""); /* first used for -I flags */
1678 for (argc--,argv++; argc > 0; argc--,argv++) {
1679 if (argv[0][0] != '-' || !argv[0][1])
1683 validarg = " PHOOEY ";
1687 * Can we rely on the kernel to start scripts with argv[1] set to
1688 * contain all #! line switches (the whole line)? (argv[0] is set to
1689 * the interpreter name, argv[2] to the script name; argv[3] and
1690 * above may contain other arguments.)
1697 #ifndef PERL_STRICT_CR
1722 if ((s = moreswitches(s)))
1727 CHECK_MALLOC_TOO_LATE_FOR('t');
1728 if( !PL_tainting ) {
1729 PL_taint_warn = TRUE;
1735 CHECK_MALLOC_TOO_LATE_FOR('T');
1737 PL_taint_warn = FALSE;
1745 #ifdef MACOS_TRADITIONAL
1746 /* ignore -e for Dev:Pseudo argument */
1747 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1750 forbid_setid('e', -1);
1752 PL_e_script = newSVpvs("");
1753 filter_add(read_e_script, NULL);
1756 sv_catpv(PL_e_script, s);
1758 sv_catpv(PL_e_script, argv[1]);
1762 Perl_croak(aTHX_ "No code specified for -%c", c);
1763 sv_catpvs(PL_e_script, "\n");
1767 #ifdef USE_SITECUSTOMIZE
1773 case 'I': /* -I handled both here and in moreswitches() */
1774 forbid_setid('I', -1);
1775 if (!*++s && (s=argv[1]) != NULL) {
1779 STRLEN len = strlen(s);
1780 const char * const p = savepvn(s, len);
1781 incpush(p, TRUE, TRUE, FALSE, FALSE);
1782 sv_catpvs(sv, "-I");
1783 sv_catpvn(sv, p, len);
1788 Perl_croak(aTHX_ "No directory specified for -I");
1791 forbid_setid('P', -1);
1792 PL_preprocess = TRUE;
1796 forbid_setid('S', -1);
1804 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1808 opts_prog = newSVpvs("print Config::myconfig(),");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1812 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1814 opts = SvCUR(opts_prog);
1816 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1820 # ifdef DEBUG_LEAKING_SCALARS
1821 " DEBUG_LEAKING_SCALARS"
1823 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1824 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1826 # ifdef FAKE_THREADS
1829 # ifdef MULTIPLICITY
1838 # ifdef PERL_DEBUG_READONLY_OPS
1839 " PERL_DEBUG_READONLY_OPS"
1841 # ifdef PERL_DONT_CREATE_GVSV
1842 " PERL_DONT_CREATE_GVSV"
1844 # ifdef PERL_GLOBAL_STRUCT
1845 " PERL_GLOBAL_STRUCT"
1847 # ifdef PERL_IMPLICIT_CONTEXT
1848 " PERL_IMPLICIT_CONTEXT"
1850 # ifdef PERL_IMPLICIT_SYS
1851 " PERL_IMPLICIT_SYS"
1856 # ifdef PERL_MALLOC_WRAP
1859 # ifdef PERL_MEM_LOG
1862 # ifdef PERL_MEM_LOG_ENV
1865 # ifdef PERL_MEM_LOG_ENV_FD
1866 " PERL_MEM_LOG_ENV_FD"
1868 # ifdef PERL_MEM_LOG_STDERR
1869 " PERL_MEM_LOG_STDERR"
1871 # ifdef PERL_MEM_LOG_TIMESTAMP
1872 " PERL_MEM_LOG_TIMESTAMP"
1874 # ifdef PERL_NEED_APPCTX
1877 # ifdef PERL_NEED_TIMESBASE
1878 " PERL_NEED_TIMESBASE"
1880 # ifdef PERL_OLD_COPY_ON_WRITE
1881 " PERL_OLD_COPY_ON_WRITE"
1886 # ifdef PERL_TRACK_MEMPOOL
1887 " PERL_TRACK_MEMPOOL"
1889 # ifdef PERL_USE_SAFE_PUTENV
1890 " PERL_USE_SAFE_PUTENV"
1892 # ifdef PERL_USES_PL_PIDSTATUS
1893 " PERL_USES_PL_PIDSTATUS"
1895 # ifdef PL_OP_SLAB_ALLOC
1898 # ifdef THREADS_HAVE_PIDS
1899 " THREADS_HAVE_PIDS"
1901 # ifdef USE_64_BIT_ALL
1904 # ifdef USE_64_BIT_INT
1907 # ifdef USE_ITHREADS
1910 # ifdef USE_LARGE_FILES
1913 # ifdef USE_LONG_DOUBLE
1919 # ifdef USE_REENTRANT_API
1920 " USE_REENTRANT_API"
1925 # ifdef USE_SITECUSTOMIZE
1926 " USE_SITECUSTOMIZE"
1933 while (SvCUR(opts_prog) > opts+76) {
1934 /* find last space after "options: " and before col 76
1938 char * const pv = SvPV_nolen(opts_prog);
1939 const char c = pv[opts+76];
1941 space = strrchr(pv+opts+26, ' ');
1943 if (!space) break; /* "Can't happen" */
1945 /* break the line before that space */
1948 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1949 STR_WITH_LEN("\\n "));
1952 sv_catpvs(opts_prog,"\\n\",");
1954 #if defined(LOCAL_PATCH_COUNT)
1955 if (LOCAL_PATCH_COUNT > 0) {
1957 sv_catpvs(opts_prog,
1958 "\" Locally applied patches:\\n\",");
1959 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1960 if (PL_localpatches[i])
1961 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1962 0, PL_localpatches[i], 0);
1966 Perl_sv_catpvf(aTHX_ opts_prog,
1967 "\" Built under %s\\n\"",OSNAME);
1970 Perl_sv_catpvf(aTHX_ opts_prog,
1971 ",\" Compiled at %s %s\\n\"",__DATE__,
1974 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1978 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1979 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1980 "sort grep {/^PERL/} keys %ENV; ");
1982 sv_catpvs(opts_prog,
1983 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1985 sv_catpvs(opts_prog,
1986 "print \" \\%ENV:\\n @env\\n\" if @env;"
1987 "print \" \\@INC:\\n @INC\\n\";");
1991 opts_prog = Perl_newSVpvf(aTHX_
1992 "Config::config_vars(qw%c%s%c)",
1996 av_push(PL_preambleav, opts_prog);
1997 /* don't look for script or read stdin */
1998 scriptname = BIT_BUCKET;
2002 PL_doextract = TRUE;
2010 if (!*++s || isSPACE(*s)) {
2014 /* catch use of gnu style long options */
2015 if (strEQ(s, "version")) {
2019 if (strEQ(s, "help")) {
2026 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2032 #ifndef SECURE_INTERNAL_GETENV
2035 (s = PerlEnv_getenv("PERL5OPT")))
2037 const char *popt = s;
2040 if (*s == '-' && *(s+1) == 'T') {
2041 CHECK_MALLOC_TOO_LATE_FOR('T');
2043 PL_taint_warn = FALSE;
2046 char *popt_copy = NULL;
2059 if (!strchr("CDIMUdmtwA", *s))
2060 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2064 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2065 s = popt_copy + (s - popt);
2066 d = popt_copy + (d - popt);
2073 if( !PL_tainting ) {
2074 PL_taint_warn = TRUE;
2084 #ifdef USE_SITECUSTOMIZE
2086 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2087 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2092 scriptname = argv[0];
2095 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2097 else if (scriptname == NULL) {
2099 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2105 /* Set $^X early so that it can be used for relocatable paths in @INC */
2106 assert (!PL_tainted);
2108 S_set_caret_X(aTHX);
2115 = open_script(scriptname, dosearch, sv, &suidscript);
2117 validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv);
2120 # if defined(SIGCHLD) || defined(SIGCLD)
2123 # define SIGCHLD SIGCLD
2125 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2126 if (sigstate == (Sighandler_t) SIG_IGN) {
2127 if (ckWARN(WARN_SIGNAL))
2128 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2129 "Can't ignore signal CHLD, forcing to default");
2130 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2137 #ifdef MACOS_TRADITIONAL
2138 || gMacPerl_AlwaysExtract
2142 /* This will croak if suidscript is >= 0, as -x cannot be used with
2144 forbid_setid('x', suidscript);
2145 /* Hence you can't get here if suidscript >= 0 */
2147 find_beginning(linestr_sv);
2148 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2149 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2153 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2154 CvUNIQUE_on(PL_compcv);
2156 CvPADLIST(PL_compcv) = pad_new(0);
2158 PL_isarev = newHV();
2161 boot_core_UNIVERSAL();
2162 boot_core_xsutils();
2166 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2168 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2174 # ifdef HAS_SOCKS5_INIT
2175 socks5_init(argv[0]);
2181 init_predump_symbols();
2182 /* init_postdump_symbols not currently designed to be called */
2183 /* more than once (ENV isn't cleared first, for example) */
2184 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2186 init_postdump_symbols(argc,argv,env);
2188 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2189 * or explicitly in some platforms.
2190 * locale.c:Perl_init_i18nl10n() if the environment
2191 * look like the user wants to use UTF-8. */
2192 #if defined(__SYMBIAN32__)
2193 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2196 /* Requires init_predump_symbols(). */
2197 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2202 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2203 * and the default open disciplines. */
2204 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2205 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2207 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2208 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2209 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2211 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2212 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2213 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2215 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2216 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2217 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2219 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2220 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2223 sv_setpvn(sv, ":utf8\0:utf8", 11);
2225 sv_setpvn(sv, ":utf8\0", 6);
2228 sv_setpvn(sv, "\0:utf8", 6);
2234 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2235 if (strEQ(s, "unsafe"))
2236 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2237 else if (strEQ(s, "safe"))
2238 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2240 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2244 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2248 PL_xmlfp = PerlIO_stdout();
2250 PL_xmlfp = PerlIO_open(s, "w");
2252 Perl_croak(aTHX_ "Can't open %s", s);
2254 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2256 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2257 PL_madskills = atoi(s);
2258 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2264 lex_start(linestr_sv);
2266 PL_subname = newSVpvs("main");
2268 /* now parse the script */
2270 SETERRNO(0,SS_NORMAL);
2272 #ifdef MACOS_TRADITIONAL
2273 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2275 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2277 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2278 MacPerl_MPWFileName(PL_origfilename));
2282 if (yyparse() || PL_error_count) {
2284 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2286 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2291 CopLINE_set(PL_curcop, 0);
2292 PL_curstash = PL_defstash;
2293 PL_preprocess = FALSE;
2295 SvREFCNT_dec(PL_e_script);
2303 SAVECOPFILE(PL_curcop);
2304 SAVECOPLINE(PL_curcop);
2305 gv_check(PL_defstash);
2312 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2313 dump_mstats("after compilation:");
2322 =for apidoc perl_run
2324 Tells a Perl interpreter to run. See L<perlembed>.
2337 PERL_UNUSED_ARG(my_perl);
2339 oldscope = PL_scopestack_ix;
2347 cxstack_ix = -1; /* start context stack again */
2349 case 0: /* normal completion */
2353 case 2: /* my_exit() */
2354 while (PL_scopestack_ix > oldscope)
2357 PL_curstash = PL_defstash;
2358 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2359 PL_endav && !PL_minus_c)
2360 call_list(oldscope, PL_endav);
2362 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2363 dump_mstats("after execution: ");
2369 POPSTACK_TO(PL_mainstack);
2372 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2383 S_run_body(pTHX_ I32 oldscope)
2386 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2387 PL_sawampersand ? "Enabling" : "Omitting"));
2389 if (!PL_restartop) {
2393 exit(0); /* less likely to core dump than my_exit(0) */
2396 DEBUG_x(dump_all());
2399 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2401 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2405 #ifdef MACOS_TRADITIONAL
2406 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2407 (gMacPerl_ErrorFormat ? "# " : ""),
2408 MacPerl_MPWFileName(PL_origfilename));
2410 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2414 if (PERLDB_SINGLE && PL_DBsingle)
2415 sv_setiv(PL_DBsingle, 1);
2417 call_list(oldscope, PL_initav);
2418 #ifdef PERL_DEBUG_READONLY_OPS
2419 Perl_pending_Slabs_to_ro(aTHX);
2426 PL_op = PL_restartop;
2430 else if (PL_main_start) {
2431 CvDEPTH(PL_main_cv) = 1;
2432 PL_op = PL_main_start;
2440 =head1 SV Manipulation Functions
2442 =for apidoc p||get_sv
2444 Returns the SV of the specified Perl scalar. If C<create> is set and the
2445 Perl variable does not exist then it will be created. If C<create> is not
2446 set and the variable does not exist then NULL is returned.
2452 Perl_get_sv(pTHX_ const char *name, I32 create)
2455 gv = gv_fetchpv(name, create, SVt_PV);
2462 =head1 Array Manipulation Functions
2464 =for apidoc p||get_av
2466 Returns the AV of the specified Perl array. If C<create> is set and the
2467 Perl variable does not exist then it will be created. If C<create> is not
2468 set and the variable does not exist then NULL is returned.
2474 Perl_get_av(pTHX_ const char *name, I32 create)
2476 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2485 =head1 Hash Manipulation Functions
2487 =for apidoc p||get_hv
2489 Returns the HV of the specified Perl hash. If C<create> is set and the
2490 Perl variable does not exist then it will be created. If C<create> is not
2491 set and the variable does not exist then NULL is returned.
2497 Perl_get_hv(pTHX_ const char *name, I32 create)
2499 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2508 =head1 CV Manipulation Functions
2510 =for apidoc p||get_cvn_flags
2512 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2513 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2514 exist then it will be declared (which has the same effect as saying
2515 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2516 then NULL is returned.
2518 =for apidoc p||get_cv
2520 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2526 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2528 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2529 /* XXX this is probably not what they think they're getting.
2530 * It has the same effect as "sub name;", i.e. just a forward
2532 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2533 SV *const sv = newSVpvn(name,len);
2534 SvFLAGS(sv) |= flags & SVf_UTF8;
2535 return newSUB(start_subparse(FALSE, 0),
2536 newSVOP(OP_CONST, 0, sv),
2545 Perl_get_cv(pTHX_ const char *name, I32 flags)
2547 return get_cvn_flags(name, strlen(name), flags);
2550 /* Be sure to refetch the stack pointer after calling these routines. */
2554 =head1 Callback Functions
2556 =for apidoc p||call_argv
2558 Performs a callback to the specified Perl sub. See L<perlcall>.
2564 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2566 /* See G_* flags in cop.h */
2567 /* null terminated arg list */
2575 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2580 return call_pv(sub_name, flags);
2584 =for apidoc p||call_pv
2586 Performs a callback to the specified Perl sub. See L<perlcall>.
2592 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2593 /* name of the subroutine */
2594 /* See G_* flags in cop.h */
2596 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2600 =for apidoc p||call_method
2602 Performs a callback to the specified Perl method. The blessed object must
2603 be on the stack. See L<perlcall>.
2609 Perl_call_method(pTHX_ const char *methname, I32 flags)
2610 /* name of the subroutine */
2611 /* See G_* flags in cop.h */
2613 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2616 /* May be called with any of a CV, a GV, or an SV containing the name. */
2618 =for apidoc p||call_sv
2620 Performs a callback to the Perl sub whose name is in the SV. See
2627 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2628 /* See G_* flags in cop.h */
2631 LOGOP myop; /* fake syntax tree node */
2636 bool oldcatch = CATCH_GET;
2638 OP* const oldop = PL_op;
2641 if (flags & G_DISCARD) {
2646 Zero(&myop, 1, LOGOP);
2647 myop.op_next = NULL;
2648 if (!(flags & G_NOARGS))
2649 myop.op_flags |= OPf_STACKED;
2650 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2651 (flags & G_ARRAY) ? OPf_WANT_LIST :
2656 EXTEND(PL_stack_sp, 1);
2657 *++PL_stack_sp = sv;
2659 oldscope = PL_scopestack_ix;
2661 if (PERLDB_SUB && PL_curstash != PL_debstash
2662 /* Handle first BEGIN of -d. */
2663 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2664 /* Try harder, since this may have been a sighandler, thus
2665 * curstash may be meaningless. */
2666 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2667 && !(flags & G_NODEBUG))
2668 PL_op->op_private |= OPpENTERSUB_DB;
2670 if (flags & G_METHOD) {
2671 Zero(&method_op, 1, UNOP);
2672 method_op.op_next = PL_op;
2673 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2674 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2675 PL_op = (OP*)&method_op;
2678 if (!(flags & G_EVAL)) {
2680 CALL_BODY_SUB((OP*)&myop);
2681 retval = PL_stack_sp - (PL_stack_base + oldmark);
2682 CATCH_SET(oldcatch);
2685 myop.op_other = (OP*)&myop;
2687 create_eval_scope(flags|G_FAKINGEVAL);
2695 CALL_BODY_SUB((OP*)&myop);
2696 retval = PL_stack_sp - (PL_stack_base + oldmark);
2697 if (!(flags & G_KEEPERR))
2698 sv_setpvn(ERRSV,"",0);
2704 /* my_exit() was called */
2705 PL_curstash = PL_defstash;
2708 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2709 Perl_croak(aTHX_ "Callback called exit");
2714 PL_op = PL_restartop;
2718 PL_stack_sp = PL_stack_base + oldmark;
2719 if (flags & G_ARRAY)
2723 *++PL_stack_sp = &PL_sv_undef;
2728 if (PL_scopestack_ix > oldscope)
2729 delete_eval_scope();
2733 if (flags & G_DISCARD) {
2734 PL_stack_sp = PL_stack_base + oldmark;
2743 /* Eval a string. The G_EVAL flag is always assumed. */
2746 =for apidoc p||eval_sv
2748 Tells Perl to C<eval> the string in the SV.
2754 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2756 /* See G_* flags in cop.h */
2760 UNOP myop; /* fake syntax tree node */
2761 VOL I32 oldmark = SP - PL_stack_base;
2764 OP* const oldop = PL_op;
2767 if (flags & G_DISCARD) {
2774 Zero(PL_op, 1, UNOP);
2775 EXTEND(PL_stack_sp, 1);
2776 *++PL_stack_sp = sv;
2778 if (!(flags & G_NOARGS))
2779 myop.op_flags = OPf_STACKED;
2780 myop.op_next = NULL;
2781 myop.op_type = OP_ENTEREVAL;
2782 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2783 (flags & G_ARRAY) ? OPf_WANT_LIST :
2785 if (flags & G_KEEPERR)
2786 myop.op_flags |= OPf_SPECIAL;
2788 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2789 * before a PUSHEVAL, which corrupts the stack after a croak */
2790 TAINT_PROPER("eval_sv()");
2796 CALL_BODY_EVAL((OP*)&myop);
2797 retval = PL_stack_sp - (PL_stack_base + oldmark);
2798 if (!(flags & G_KEEPERR))
2799 sv_setpvn(ERRSV,"",0);
2805 /* my_exit() was called */
2806 PL_curstash = PL_defstash;
2809 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2810 Perl_croak(aTHX_ "Callback called exit");
2815 PL_op = PL_restartop;
2819 PL_stack_sp = PL_stack_base + oldmark;
2820 if (flags & G_ARRAY)
2824 *++PL_stack_sp = &PL_sv_undef;
2830 if (flags & G_DISCARD) {
2831 PL_stack_sp = PL_stack_base + oldmark;
2841 =for apidoc p||eval_pv
2843 Tells Perl to C<eval> the given string and return an SV* result.
2849 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2853 SV* sv = newSVpv(p, 0);
2855 eval_sv(sv, G_SCALAR);
2862 if (croak_on_error && SvTRUE(ERRSV)) {
2863 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2869 /* Require a module. */
2872 =head1 Embedding Functions
2874 =for apidoc p||require_pv
2876 Tells Perl to C<require> the file named by the string argument. It is
2877 analogous to the Perl code C<eval "require '$file'">. It's even
2878 implemented that way; consider using load_module instead.
2883 Perl_require_pv(pTHX_ const char *pv)
2888 PUSHSTACKi(PERLSI_REQUIRE);
2890 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2891 eval_sv(sv_2mortal(sv), G_DISCARD);
2897 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2899 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
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[mod][=pattern] activate all/given assertions",
2914 "-a autosplit mode with -n or -p (splits $_ into @F)",
2915 "-C[number/list] enables the listed Unicode features",
2916 "-c check syntax only (runs BEGIN and CHECK blocks)",
2917 "-d[:debugger] run program under debugger",
2918 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2919 "-e program one line of program (several -e's allowed, omit programfile)",
2920 "-E program like -e, but enables all optional features",
2921 "-f don't do $sitelib/sitecustomize.pl at startup",
2922 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2923 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2924 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2925 "-l[octal] enable line ending processing, specifies line terminator",
2926 "-[mM][-]module execute \"use/no module...\" before executing program",
2927 "-n assume \"while (<>) { ... }\" loop around program",
2928 "-p assume loop like -n but print line also, like sed",
2929 "-P run program through C preprocessor before compilation",
2930 "-s enable rudimentary parsing for switches after programfile",
2931 "-S look for programfile using PATH environment variable",
2932 "-t enable tainting warnings",
2933 "-T enable tainting checks",
2934 "-u dump core after parsing program",
2935 "-U allow unsafe operations",
2936 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2937 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2938 "-w enable many useful warnings (RECOMMENDED)",
2939 "-W enable all warnings",
2940 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2941 "-X disable all warnings",
2945 const char * const *p = usage_msg;
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, preprocessor command for -P, 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",
2978 " S Thread synchronization",
2980 " R Include reference counts of dumped variables (eg when using -Ds)",
2981 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2982 " v Verbose: use in conjunction with other flags",
2984 " A Consistency checks on internal structures",
2985 " q quiet - currently only suppresses the 'EXECUTING' message",
2990 /* if adding extra options, remember to update DEBUG_MASK */
2991 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2993 for (; isALNUM(**s); (*s)++) {
2994 const char * const d = strchr(debopts,**s);
2996 i |= 1 << (d - debopts);
2997 else if (ckWARN_d(WARN_DEBUGGING))
2998 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2999 "invalid option -D%c, use -D'' to see choices\n", **s);
3002 else if (isDIGIT(**s)) {
3004 for (; isALNUM(**s); (*s)++) ;
3006 else if (givehelp) {
3007 const char *const *p = usage_msgd;
3008 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3011 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3012 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3013 "-Dp not implemented on this platform\n");
3019 /* This routine handles any switches that can be given during run */
3022 Perl_moreswitches(pTHX_ char *s)
3033 SvREFCNT_dec(PL_rs);
3034 if (s[1] == 'x' && s[2]) {
3035 const char *e = s+=2;
3041 flags = PERL_SCAN_SILENT_ILLDIGIT;
3042 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3043 if (s + numlen < e) {
3044 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3048 PL_rs = newSVpvs("");
3049 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3050 tmps = (U8*)SvPVX(PL_rs);
3051 uvchr_to_utf8(tmps, rschar);
3052 SvCUR_set(PL_rs, UNISKIP(rschar));
3057 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3058 if (rschar & ~((U8)~0))
3059 PL_rs = &PL_sv_undef;
3060 else if (!rschar && numlen >= 2)
3061 PL_rs = newSVpvs("");
3063 char ch = (char)rschar;
3064 PL_rs = newSVpvn(&ch, 1);
3067 sv_setsv(get_sv("/", TRUE), PL_rs);
3072 PL_unicode = parse_unicode_opts( (const char **)&s );
3073 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3079 while (*s && !isSPACE(*s)) ++s;
3080 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3091 forbid_setid('d', -1);
3094 /* -dt indicates to the debugger that threads will be used */
3095 if (*s == 't' && !isALNUM(s[1])) {
3097 my_setenv("PERL5DB_THREADED", "1");
3100 /* The following permits -d:Mod to accepts arguments following an =
3101 in the fashion that -MSome::Mod does. */
3102 if (*s == ':' || *s == '=') {
3104 SV * const sv = newSVpvs("use Devel::");
3106 /* We now allow -d:Module=Foo,Bar */
3107 while(isALNUM(*s) || *s==':') ++s;
3109 sv_catpv(sv, start);
3111 sv_catpvn(sv, start, s-start);
3112 /* Don't use NUL as q// delimiter here, this string goes in the
3114 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3117 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3120 PL_perldb = PERLDB_ALL;
3127 forbid_setid('D', -1);
3129 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3130 #else /* !DEBUGGING */
3131 if (ckWARN_d(WARN_DEBUGGING))
3132 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3133 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3134 for (s++; isALNUM(*s); s++) ;
3139 usage(PL_origargv[0]);
3142 Safefree(PL_inplace);
3143 #if defined(__CYGWIN__) /* do backup extension automagically */
3144 if (*(s+1) == '\0') {
3145 PL_inplace = savepvs(".bak");
3148 #endif /* __CYGWIN__ */
3150 const char * const start = ++s;
3151 while (*s && !isSPACE(*s))
3154 PL_inplace = savepvn(start, s - start);
3158 if (*s == '-') /* Additional switches on #! line. */
3162 case 'I': /* -I handled both here and in parse_body() */
3163 forbid_setid('I', -1);
3165 while (*s && isSPACE(*s))
3170 /* ignore trailing spaces (possibly followed by other switches) */
3172 for (e = p; *e && !isSPACE(*e); e++) ;
3176 } while (*p && *p != '-');
3177 e = savepvn(s, e-s);
3178 incpush(e, TRUE, TRUE, FALSE, FALSE);
3185 Perl_croak(aTHX_ "No directory specified for -I");
3191 SvREFCNT_dec(PL_ors_sv);
3197 PL_ors_sv = newSVpvs("\n");
3198 numlen = 3 + (*s == '0');
3199 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3203 if (RsPARA(PL_rs)) {
3204 PL_ors_sv = newSVpvs("\n\n");
3207 PL_ors_sv = newSVsv(PL_rs);
3212 forbid_setid('A', -1);
3215 char * const start = s;
3216 SV * const sv = newSVpvs("use assertions::activate");
3217 while(isALNUM(*s) || *s == ':') ++s;
3219 sv_catpvs(sv, "::");
3220 sv_catpvn(sv, start, s-start);
3223 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3226 else if (*s != '\0') {
3227 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3229 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3233 forbid_setid('M', -1); /* XXX ? */
3236 forbid_setid('m', -1); /* XXX ? */
3240 const char *use = "use ";
3241 /* -M-foo == 'no foo' */
3242 /* Leading space on " no " is deliberate, to make both
3243 possibilities the same length. */
3244 if (*s == '-') { use = " no "; ++s; }
3245 sv = newSVpvn(use,4);
3247 /* We allow -M'Module qw(Foo Bar)' */
3248 while(isALNUM(*s) || *s==':') ++s;
3250 sv_catpv(sv, start);
3251 if (*(start-1) == 'm') {
3253 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3254 sv_catpvs( sv, " ()");
3258 Perl_croak(aTHX_ "Module name required with -%c option",
3260 sv_catpvn(sv, start, s-start);
3261 sv_catpvs(sv, " split(/,/,q");
3262 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3264 sv_catpvs(sv, "\0)");
3267 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3270 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3281 forbid_setid('s', -1);
3282 PL_doswitches = TRUE;
3296 #ifdef MACOS_TRADITIONAL
3297 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3299 PL_do_undump = TRUE;
3307 if (!sv_derived_from(PL_patchlevel, "version"))
3308 upg_version(PL_patchlevel, TRUE);
3310 PerlIO_printf(PerlIO_stdout(),
3311 Perl_form(aTHX_ "\nThis is perl, %"SVf
3312 #ifdef PERL_PATCHNUM
3313 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3316 SVfARG(vstringify(PL_patchlevel)),
3319 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3322 SVfARG(vstringify(PL_patchlevel))));
3323 PerlIO_printf(PerlIO_stdout(),
3324 Perl_form(aTHX_ " built under %s at %s %s\n",
3325 OSNAME, __DATE__, __TIME__));
3326 PerlIO_printf(PerlIO_stdout(),
3327 Perl_form(aTHX_ " OS Specific Release: %s\n",
3331 #if defined(LOCAL_PATCH_COUNT)
3332 if (LOCAL_PATCH_COUNT > 0)
3333 PerlIO_printf(PerlIO_stdout(),
3334 "\n(with %d registered patch%s, "
3335 "see perl -V for more detail)",
3337 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "\n\nCopyright 1987-2007, Larry Wall\n");
3342 #ifdef MACOS_TRADITIONAL
3343 PerlIO_printf(PerlIO_stdout(),
3344 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3345 "maintained by Chris Nandor\n");
3348 PerlIO_printf(PerlIO_stdout(),
3349 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3352 PerlIO_printf(PerlIO_stdout(),
3353 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3354 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3359 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "atariST series port, ++jrb bammi@cadence.com\n");
3366 PerlIO_printf(PerlIO_stdout(),
3367 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3370 PerlIO_printf(PerlIO_stdout(),
3371 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3374 PerlIO_printf(PerlIO_stdout(),
3375 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3378 PerlIO_printf(PerlIO_stdout(),
3379 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3382 PerlIO_printf(PerlIO_stdout(),
3383 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3386 PerlIO_printf(PerlIO_stdout(),
3387 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3390 PerlIO_printf(PerlIO_stdout(),
3391 "MiNT port by Guido Flohr, 1997-1999\n");
3394 PerlIO_printf(PerlIO_stdout(),
3395 "EPOC port by Olaf Flebbe, 1999-2002\n");
3398 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3399 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3402 #ifdef __SYMBIAN32__
3403 PerlIO_printf(PerlIO_stdout(),
3404 "Symbian port by Nokia, 2004-2005\n");
3406 #ifdef BINARY_BUILD_NOTICE
3407 BINARY_BUILD_NOTICE;
3409 PerlIO_printf(PerlIO_stdout(),
3411 Perl may be copied only under the terms of either the Artistic License or the\n\
3412 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3413 Complete documentation for Perl, including FAQ lists, should be found on\n\
3414 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3415 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3418 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3419 PL_dowarn |= G_WARN_ON;
3424 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3425 if (!specialWARN(PL_compiling.cop_warnings))
3426 PerlMemShared_free(PL_compiling.cop_warnings);
3427 PL_compiling.cop_warnings = pWARN_ALL ;
3431 PL_dowarn = G_WARN_ALL_OFF;
3432 if (!specialWARN(PL_compiling.cop_warnings))
3433 PerlMemShared_free(PL_compiling.cop_warnings);
3434 PL_compiling.cop_warnings = pWARN_NONE ;
3439 if (s[1] == '-') /* Additional switches on #! line. */
3444 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3450 #ifdef ALTERNATE_SHEBANG
3451 case 'S': /* OS/2 needs -S on "extproc" line. */
3459 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3464 /* compliments of Tom Christiansen */
3466 /* unexec() can be found in the Gnu emacs distribution */
3467 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3470 Perl_my_unexec(pTHX)
3472 PERL_UNUSED_CONTEXT;
3474 SV * prog = newSVpv(BIN_EXP, 0);
3475 SV * file = newSVpv(PL_origfilename, 0);
3479 sv_catpvs(prog, "/perl");
3480 sv_catpvs(file, ".perldump");
3482 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3483 /* unexec prints msg to stderr in case of failure */
3484 PerlProc_exit(status);
3487 # include <lib$routines.h>
3488 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3489 # elif defined(WIN32) || defined(__CYGWIN__)
3490 Perl_croak(aTHX_ "dump is not supported");
3492 ABORT(); /* for use with undump */
3497 /* initialize curinterp */
3503 # define PERLVAR(var,type)
3504 # define PERLVARA(var,n,type)
3505 # if defined(PERL_IMPLICIT_CONTEXT)
3506 # define PERLVARI(var,type,init) aTHX->var = init;
3507 # define PERLVARIC(var,type,init) aTHX->var = init;
3509 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3510 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3512 # include "intrpvar.h"
3513 # include "thrdvar.h"
3519 # define PERLVAR(var,type)
3520 # define PERLVARA(var,n,type)
3521 # define PERLVARI(var,type,init) PL_##var = init;
3522 # define PERLVARIC(var,type,init) PL_##var = init;
3523 # include "intrpvar.h"
3524 # include "thrdvar.h"
3531 /* As these are inside a structure, PERLVARI isn't capable of initialising
3533 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3534 PL_reg_poscache = PL_reg_starttry = NULL;
3538 S_init_main_stash(pTHX)
3543 PL_curstash = PL_defstash = newHV();
3544 /* We know that the string "main" will be in the global shared string
3545 table, so it's a small saving to use it rather than allocate another
3547 PL_curstname = newSVpvs_share("main");
3548 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3549 /* If we hadn't caused another reference to "main" to be in the shared
3550 string table above, then it would be worth reordering these two,
3551 because otherwise all we do is delete "main" from it as a consequence
3552 of the SvREFCNT_dec, only to add it again with hv_name_set */
3553 SvREFCNT_dec(GvHV(gv));
3554 hv_name_set(PL_defstash, "main", 4, 0);
3555 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3557 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3559 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3560 GvMULTI_on(PL_incgv);
3561 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3562 GvMULTI_on(PL_hintgv);
3563 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3564 SvREFCNT_inc_simple_void(PL_defgv);
3565 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3566 SvREFCNT_inc_simple_void(PL_errgv);
3567 GvMULTI_on(PL_errgv);
3568 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3569 GvMULTI_on(PL_replgv);
3570 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3571 #ifdef PERL_DONT_CREATE_GVSV
3574 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3575 sv_setpvn(ERRSV, "", 0);
3576 PL_curstash = PL_defstash;
3577 CopSTASH_set(&PL_compiling, PL_defstash);
3578 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3579 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3581 /* We must init $/ before switches are processed. */
3582 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3586 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3592 const char *cpp_discard_flag;
3601 PL_origfilename = savepvs("-e");
3604 /* if find_script() returns, it returns a malloc()-ed value */
3605 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3607 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3608 const char *s = scriptname + 8;
3614 * Tell apart "normal" usage of fdscript, e.g.
3615 * with bash on FreeBSD:
3616 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3617 * from usage in suidperl.
3618 * Does any "normal" usage leave garbage after the number???
3619 * Is it a mistake to use a similar /dev/fd/ construct for
3624 * Be supersafe and do some sanity-checks.
3625 * Still, can we be sure we got the right thing?
3628 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3631 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3633 scriptname = savepv(s + 1);
3634 Safefree(PL_origfilename);
3635 PL_origfilename = (char *)scriptname;
3640 CopFILE_free(PL_curcop);
3641 CopFILE_set(PL_curcop, PL_origfilename);
3642 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3643 scriptname = (char *)"";
3644 if (fdscript >= 0) {
3645 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3646 # if defined(HAS_FCNTL) && defined(F_SETFD)
3648 /* ensure close-on-exec */
3649 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3654 Perl_croak(aTHX_ "sperl needs fd script\n"
3655 "You should not call sperl directly; do you need to "
3656 "change a #! line\nfrom sperl to perl?\n");
3659 * Do not open (or do other fancy stuff) while setuid.
3660 * Perl does the open, and hands script to suidperl on a fd;
3661 * suidperl only does some checks, sets up UIDs and re-execs
3662 * perl with that fd as it has always done.
3665 if (*suidscript != 1) {
3666 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3669 else if (PL_preprocess) {
3670 const char * const cpp_cfg = CPPSTDIN;
3671 SV * const cpp = newSVpvs("");
3672 SV * const cmd = newSV(0);
3674 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3675 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3676 if (strEQ(cpp_cfg, "cppstdin"))
3677 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3678 sv_catpv(cpp, cpp_cfg);
3681 sv_catpvs(sv, "-I");
3682 sv_catpv(sv,PRIVLIB_EXP);
3685 DEBUG_P(PerlIO_printf(Perl_debug_log,
3686 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3687 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3690 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3697 cpp_discard_flag = "";
3699 cpp_discard_flag = "-C";
3703 perl = os2_execname(aTHX);
3705 perl = PL_origargv[0];
3709 /* This strips off Perl comments which might interfere with
3710 the C pre-processor, including #!. #line directives are
3711 deliberately stripped to avoid confusion with Perl's version
3712 of #line. FWP played some golf with it so it will fit
3713 into VMS's 255 character buffer.
3716 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3718 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3720 Perl_sv_setpvf(aTHX_ cmd, "\
3721 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3722 perl, quote, code, quote, scriptname, SVfARG(cpp),
3723 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3725 PL_doextract = FALSE;
3727 DEBUG_P(PerlIO_printf(Perl_debug_log,
3728 "PL_preprocess: cmd=\"%s\"\n",
3731 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3735 else if (!*scriptname) {
3736 forbid_setid(0, *suidscript);
3737 PL_rsfp = PerlIO_stdin();
3740 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3741 # if defined(HAS_FCNTL) && defined(F_SETFD)
3743 /* ensure close-on-exec */
3744 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3747 #endif /* IAMSUID */
3749 /* PSz 16 Sep 03 Keep neat error message */
3751 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3753 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3754 CopFILE(PL_curcop), Strerror(errno));
3760 * I_SYSSTATVFS HAS_FSTATVFS
3762 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3763 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3764 * here so that metaconfig picks them up. */
3768 S_fd_on_nosuid_fs(pTHX_ int fd)
3771 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3772 * but is needed also on machines without setreuid.
3773 * Seems safe enough to run as root.
3775 int check_okay = 0; /* able to do all the required sys/libcalls */
3776 int on_nosuid = 0; /* the fd is on a nosuid fs */
3778 * Need to check noexec also: nosuid might not be set, the average
3779 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3781 int on_noexec = 0; /* the fd is on a noexec fs */
3784 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3785 * fstatvfs() is UNIX98.
3786 * fstatfs() is 4.3 BSD.
3787 * ustat()+getmnt() is pre-4.3 BSD.
3788 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3789 * an irrelevant filesystem while trying to reach the right one.
3792 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3794 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3795 defined(HAS_FSTATVFS)
3796 # define FD_ON_NOSUID_CHECK_OKAY
3797 struct statvfs stfs;
3799 check_okay = fstatvfs(fd, &stfs) == 0;
3800 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3802 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3803 on platforms where it is present. */
3804 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3806 # endif /* fstatvfs */
3808 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3809 defined(PERL_MOUNT_NOSUID) && \
3810 defined(PERL_MOUNT_NOEXEC) && \
3811 defined(HAS_FSTATFS) && \
3812 defined(HAS_STRUCT_STATFS) && \
3813 defined(HAS_STRUCT_STATFS_F_FLAGS)
3814 # define FD_ON_NOSUID_CHECK_OKAY
3817 check_okay = fstatfs(fd, &stfs) == 0;
3818 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3819 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3820 # endif /* fstatfs */
3822 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3823 defined(PERL_MOUNT_NOSUID) && \
3824 defined(PERL_MOUNT_NOEXEC) && \
3825 defined(HAS_FSTAT) && \
3826 defined(HAS_USTAT) && \
3827 defined(HAS_GETMNT) && \
3828 defined(HAS_STRUCT_FS_DATA) && \
3830 # define FD_ON_NOSUID_CHECK_OKAY
3833 if (fstat(fd, &fdst) == 0) {
3835 if (ustat(fdst.st_dev, &us) == 0) {
3837 /* NOSTAT_ONE here because we're not examining fields which
3838 * vary between that case and STAT_ONE. */
3839 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3840 size_t cmplen = sizeof(us.f_fname);
3841 if (sizeof(fsd.fd_req.path) < cmplen)
3842 cmplen = sizeof(fsd.fd_req.path);
3843 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3844 fdst.st_dev == fsd.fd_req.dev) {
3846 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3847 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3852 # endif /* fstat+ustat+getmnt */
3854 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3855 defined(HAS_GETMNTENT) && \
3856 defined(HAS_HASMNTOPT) && \
3857 defined(MNTOPT_NOSUID) && \
3858 defined(MNTOPT_NOEXEC)
3859 # define FD_ON_NOSUID_CHECK_OKAY
3860 FILE *mtab = fopen("/etc/mtab", "r");
3861 struct mntent *entry;
3864 if (mtab && (fstat(fd, &stb) == 0)) {
3865 while (entry = getmntent(mtab)) {
3866 if (stat(entry->mnt_dir, &fsb) == 0
3867 && fsb.st_dev == stb.st_dev)
3869 /* found the filesystem */
3871 if (hasmntopt(entry, MNTOPT_NOSUID))
3873 if (hasmntopt(entry, MNTOPT_NOEXEC))
3876 } /* A single fs may well fail its stat(). */
3881 # endif /* getmntent+hasmntopt */
3884 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3886 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3888 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3889 return ((!check_okay) || on_nosuid || on_noexec);
3891 #endif /* IAMSUID */
3894 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3895 int fdscript, int suidscript, SV *linestr_sv)
3900 #endif /* IAMSUID */
3902 /* do we need to emulate setuid on scripts? */
3904 /* This code is for those BSD systems that have setuid #! scripts disabled
3905 * in the kernel because of a security problem. Merely defining DOSUID
3906 * in perl will not fix that problem, but if you have disabled setuid
3907 * scripts in the kernel, this will attempt to emulate setuid and setgid
3908 * on scripts that have those now-otherwise-useless bits set. The setuid
3909 * root version must be called suidperl or sperlN.NNN. If regular perl
3910 * discovers that it has opened a setuid script, it calls suidperl with
3911 * the same argv that it had. If suidperl finds that the script it has
3912 * just opened is NOT setuid root, it sets the effective uid back to the
3913 * uid. We don't just make perl setuid root because that loses the
3914 * effective uid we had before invoking perl, if it was different from the
3917 * Description/comments above do not match current workings:
3918 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3919 * suidperl called with script open and name changed to /dev/fd/N/X;
3920 * suidperl croaks if script is not setuid;
3921 * making perl setuid would be a huge security risk (and yes, that
3922 * would lose any euid we might have had).
3924 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3925 * be defined in suidperl only. suidperl must be setuid root. The
3926 * Configure script will set this up for you if you want it.
3932 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3933 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3934 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3936 const char *linestr;
3940 if (fdscript < 0 || suidscript != 1)
3941 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3943 * Since the script is opened by perl, not suidperl, some of these
3944 * checks are superfluous. Leaving them in probably does not lower
3948 * Do checks even for systems with no HAS_SETREUID.
3949 * We used to swap, then re-swap UIDs with
3951 if (setreuid(PL_euid,PL_uid) < 0
3952 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3953 Perl_croak(aTHX_ "Can't swap uid and euid");
3956 if (setreuid(PL_uid,PL_euid) < 0
3957 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3958 Perl_croak(aTHX_ "Can't reswap uid and euid");
3962 /* On this access check to make sure the directories are readable,
3963 * there is actually a small window that the user could use to make
3964 * filename point to an accessible directory. So there is a faint
3965 * chance that someone could execute a setuid script down in a
3966 * non-accessible directory. I don't know what to do about that.
3967 * But I don't think it's too important. The manual lies when
3968 * it says access() is useful in setuid programs.
3970 * So, access() is pretty useless... but not harmful... do anyway.
3972 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3973 Perl_croak(aTHX_ "Can't access() script\n");
3976 /* If we can swap euid and uid, then we can determine access rights
3977 * with a simple stat of the file, and then compare device and
3978 * inode to make sure we did stat() on the same file we opened.
3979 * Then we just have to make sure he or she can execute it.
3982 * As the script is opened by perl, not suidperl, we do not need to
3983 * care much about access rights.
3985 * The 'script changed' check is needed, or we can get lied to
3986 * about $0 with e.g.
3987 * suidperl /dev/fd/4//bin/x 4<setuidscript
3988 * Without HAS_SETREUID, is it safe to stat() as root?
3990 * Are there any operating systems that pass /dev/fd/xxx for setuid
3991 * scripts, as suggested/described in perlsec(1)? Surely they do not
3992 * pass the script name as we do, so the "script changed" test would
3993 * fail for them... but we never get here with
3994 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3996 * This is one place where we must "lie" about return status: not
3997 * say if the stat() failed. We are doing this as root, and could
3998 * be tricked into reporting existence or not of files that the
3999 * "plain" user cannot even see.
4003 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4004 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4005 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4006 Perl_croak(aTHX_ "Setuid script changed\n");
4010 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4011 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4014 * We used to do this check as the "plain" user (after swapping
4015 * UIDs). But the check for nosuid and noexec filesystem is needed,
4016 * and should be done even without HAS_SETREUID. (Maybe those
4017 * operating systems do not have such mount options anyway...)
4018 * Seems safe enough to do as root.
4020 #if !defined(NO_NOSUID_CHECK)
4021 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4022 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4025 #endif /* IAMSUID */
4027 if (!S_ISREG(PL_statbuf.st_mode)) {
4028 Perl_croak(aTHX_ "Setuid script not plain file\n");
4030 if (PL_statbuf.st_mode & S_IWOTH)
4031 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4032 PL_doswitches = FALSE; /* -s is insecure in suid */
4033 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4034 CopLINE_inc(PL_curcop);
4035 if (sv_gets(linestr_sv, PL_rsfp, 0) == NULL)
4036 Perl_croak(aTHX_ "No #! line");
4037 linestr = SvPV_nolen_const(linestr_sv);
4038 /* required even on Sys V */
4039 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4040 Perl_croak(aTHX_ "No #! line");
4044 /* Sanity check on line length */
4045 s_end = s + strlen(s);
4046 if (s_end == s || (s_end - s) > 4000)
4047 Perl_croak(aTHX_ "Very long #! line");
4048 /* Allow more than a single space after #! */
4049 while (isSPACE(*s)) s++;
4050 /* Sanity check on buffer end */
4051 while ((*s) && !isSPACE(*s)) s++;
4052 for (s2 = s; (s2 > linestr &&
4053 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4054 || s2[-1] == '-')); s2--) ;
4055 /* Sanity check on buffer start */
4056 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4057 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4058 Perl_croak(aTHX_ "Not a perl script");
4059 while (*s == ' ' || *s == '\t') s++;
4061 * #! arg must be what we saw above. They can invoke it by
4062 * mentioning suidperl explicitly, but they may not add any strange
4063 * arguments beyond what #! says if they do invoke suidperl that way.
4066 * The way validarg was set up, we rely on the kernel to start
4067 * scripts with argv[1] set to contain all #! line switches (the
4071 * Check that we got all the arguments listed in the #! line (not
4072 * just that there are no extraneous arguments). Might not matter
4073 * much, as switches from #! line seem to be acted upon (also), and
4074 * so may be checked and trapped in perl. But, security checks must
4075 * be done in suidperl and not deferred to perl. Note that suidperl
4076 * does not get around to parsing (and checking) the switches on
4077 * the #! line (but execs perl sooner).
4078 * Allow (require) a trailing newline (which may be of two
4079 * characters on some architectures?) (but no other trailing
4082 len = strlen(validarg);
4083 if (strEQ(validarg," PHOOEY ") ||
4084 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4085 !((s_end - s) == len+1
4086 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4087 Perl_croak(aTHX_ "Args must match #! line");
4091 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4092 PL_euid == PL_statbuf.st_uid)
4094 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4095 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4096 #endif /* IAMSUID */
4099 PL_euid) { /* oops, we're not the setuid root perl */
4101 * When root runs a setuid script, we do not go through the same
4102 * steps of execing sperl and then perl with fd scripts, but
4103 * simply set up UIDs within the same perl invocation; so do
4104 * not have the same checks (on options, whatever) that we have
4105 * for plain users. No problem really: would have to be a script
4106 * that does not actually work for plain users; and if root is
4107 * foolish and can be persuaded to run such an unsafe script, he
4108 * might run also non-setuid ones, and deserves what he gets.
4110 * Or, we might drop the PL_euid check above (and rely just on
4111 * fdscript to avoid loops), and do the execs
4117 * Pass fd script to suidperl.
4118 * Exec suidperl, substituting fd script for scriptname.
4119 * Pass script name as "subdir" of fd, which perl will grok;
4120 * in fact will use that to distinguish this from "normal"
4121 * usage, see comments above.
4123 PerlIO_rewind(PL_rsfp);
4124 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4125 /* PSz 27 Feb 04 Sanity checks on scriptname */
4126 if ((!scriptname) || (!*scriptname) ) {
4127 Perl_croak(aTHX_ "No setuid script name\n");
4129 if (*scriptname == '-') {
4130 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4131 /* Or we might confuse it with an option when replacing
4132 * name in argument list, below (though we do pointer, not
4133 * string, comparisons).
4136 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4137 if (!PL_origargv[which]) {
4138 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4140 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4141 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4142 #if defined(HAS_FCNTL) && defined(F_SETFD)
4143 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4146 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4147 (int)PERL_REVISION, (int)PERL_VERSION,
4148 (int)PERL_SUBVERSION), PL_origargv);
4150 #endif /* IAMSUID */
4151 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4154 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4156 * This seems back to front: we try HAS_SETEGID first; if not available
4157 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4158 * in the sense that we only want to set EGID; but are there any machines
4159 * with either of the latter, but not the former? Same with UID, later.
4162 (void)setegid(PL_statbuf.st_gid);
4165 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4167 #ifdef HAS_SETRESGID
4168 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4170 PerlProc_setgid(PL_statbuf.st_gid);
4174 if (PerlProc_getegid() != PL_statbuf.st_gid)
4175 Perl_croak(aTHX_ "Can't do setegid!\n");
4177 if (PL_statbuf.st_mode & S_ISUID) {
4178 if (PL_statbuf.st_uid != PL_euid)
4180 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4183 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4185 #ifdef HAS_SETRESUID
4186 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4188 PerlProc_setuid(PL_statbuf.st_uid);
4192 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4193 Perl_croak(aTHX_ "Can't do seteuid!\n");
4195 else if (PL_uid) { /* oops, mustn't run as root */
4197 (void)seteuid((Uid_t)PL_uid);
4200 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4202 #ifdef HAS_SETRESUID
4203 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4205 PerlProc_setuid((Uid_t)PL_uid);
4209 if (PerlProc_geteuid() != PL_uid)
4210 Perl_croak(aTHX_ "Can't do seteuid!\n");
4213 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4214 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4217 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4218 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4219 else if (fdscript < 0 || suidscript != 1)
4220 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4221 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4223 /* PSz 16 Sep 03 Keep neat error message */
4224 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4227 /* We absolutely must clear out any saved ids here, so we */
4228 /* exec the real perl, substituting fd script for scriptname. */
4229 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4231 * It might be thought that using setresgid and/or setresuid (changed to
4232 * set the saved IDs) above might obviate the need to exec, and we could
4233 * go on to "do the perl thing".
4235 * Is there such a thing as "saved GID", and is that set for setuid (but
4236 * not setgid) execution like suidperl? Without exec, it would not be
4237 * cleared for setuid (but not setgid) scripts (or might need a dummy
4240 * We need suidperl to do the exact same argument checking that perl
4241 * does. Thus it cannot be very small; while it could be significantly
4242 * smaller, it is safer (simpler?) to make it essentially the same
4243 * binary as perl (but they are not identical). - Maybe could defer that
4244 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4245 * but prefer to do thorough checks in suidperl itself. Such deferral
4246 * would make suidperl security rely on perl, a design no-no.
4248 * Setuid things should be short and simple, thus easy to understand and
4249 * verify. They should do their "own thing", without influence by
4250 * attackers. It may help if their internal execution flow is fixed,
4251 * regardless of platform: it may be best to exec anyway.
4253 * Suidperl should at least be conceptually simple: a wrapper only,
4254 * never to do any real perl. Maybe we should put
4256 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4258 * into the perly bits.
4260 PerlIO_rewind(PL_rsfp);
4261 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4263 * Keep original arguments: suidperl already has fd script.
4265 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4266 /* if (!PL_origargv[which]) { */
4267 /* errno = EPERM; */
4268 /* Perl_croak(aTHX_ "Permission denied\n"); */
4270 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4271 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4272 #if defined(HAS_FCNTL) && defined(F_SETFD)
4273 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4276 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4277 (int)PERL_REVISION, (int)PERL_VERSION,
4278 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4280 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4281 #endif /* IAMSUID */
4283 PERL_UNUSED_ARG(fdscript);
4284 PERL_UNUSED_ARG(suidscript);
4285 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4286 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4287 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4288 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4290 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4293 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4294 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4295 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4296 /* not set-id, must be wrapped */
4299 PERL_UNUSED_ARG(validarg);
4300 PERL_UNUSED_ARG(scriptname);
4301 PERL_UNUSED_ARG(linestr_sv);
4305 S_find_beginning(pTHX_ SV* linestr_sv)
4309 register const char *s2;
4310 #ifdef MACOS_TRADITIONAL
4314 /* skip forward in input to the real script? */
4316 #ifdef MACOS_TRADITIONAL
4317 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4319 while (PL_doextract || gMacPerl_AlwaysExtract) {
4320 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL) {
4321 if (!gMacPerl_AlwaysExtract)
4322 Perl_croak(aTHX_ "No Perl script found in input\n");
4324 if (PL_doextract) /* require explicit override ? */
4325 if (!OverrideExtract(PL_origfilename))
4326 Perl_croak(aTHX_ "User aborted script\n");
4328 PL_doextract = FALSE;
4330 /* Pater peccavi, file does not have #! */
4331 PerlIO_rewind(PL_rsfp);
4336 while (PL_doextract) {
4337 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL)
4338 Perl_croak(aTHX_ "No Perl script found in input\n");
4341 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4342 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4343 PL_doextract = FALSE;
4344 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4346 while (*s == ' ' || *s == '\t') s++;
4348 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4349 || s2[-1] == '_') s2--;
4350 if (strnEQ(s2-4,"perl",4))
4351 while ((s = moreswitches(s)))
4354 #ifdef MACOS_TRADITIONAL
4355 /* We are always searching for the #!perl line in MacPerl,
4356 * so if we find it, still keep the line count correct
4357 * by counting lines we already skipped over
4359 for (; maclines > 0 ; maclines--)
4360 PerlIO_ungetc(PL_rsfp, '\n');
4364 /* gMacPerl_AlwaysExtract is false in MPW tool */
4365 } else if (gMacPerl_AlwaysExtract) {
4377 PL_uid = PerlProc_getuid();
4378 PL_euid = PerlProc_geteuid();
4379 PL_gid = PerlProc_getgid();
4380 PL_egid = PerlProc_getegid();
4382 PL_uid |= PL_gid << 16;
4383 PL_euid |= PL_egid << 16;
4385 /* Should not happen: */
4386 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4387 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4390 * Should go by suidscript, not uid!=euid: why disallow
4391 * system("ls") in scripts run from setuid things?
4392 * Or, is this run before we check arguments and set suidscript?
4393 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4394 * (We never have suidscript, can we be sure to have fdscript?)
4395 * Or must then go by UID checks? See comments in forbid_setid also.
4399 /* This is used very early in the lifetime of the program,
4400 * before even the options are parsed, so PL_tainting has
4401 * not been initialized properly. */
4403 Perl_doing_taint(int argc, char *argv[], char *envp[])
4405 #ifndef PERL_IMPLICIT_SYS
4406 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4407 * before we have an interpreter-- and the whole point of this
4408 * function is to be called at such an early stage. If you are on
4409 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4410 * "tainted because running with altered effective ids', you'll
4411 * have to add your own checks somewhere in here. The two most
4412 * known samples of 'implicitness' are Win32 and NetWare, neither
4413 * of which has much of concept of 'uids'. */
4414 int uid = PerlProc_getuid();
4415 int euid = PerlProc_geteuid();
4416 int gid = PerlProc_getgid();
4417 int egid = PerlProc_getegid();
4424 if (uid && (euid != uid || egid != gid))
4426 #endif /* !PERL_IMPLICIT_SYS */
4427 /* This is a really primitive check; environment gets ignored only
4428 * if -T are the first chars together; otherwise one gets
4429 * "Too late" message. */
4430 if ( argc > 1 && argv[1][0] == '-'
4431 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4436 /* Passing the flag as a single char rather than a string is a slight space
4437 optimisation. The only message that isn't /^-.$/ is
4438 "program input from stdin", which is substituted in place of '\0', which
4439 could never be a command line flag. */
4441 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4444 char string[3] = "-x";
4445 const char *message = "program input from stdin";
4452 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4453 if (PL_euid != PL_uid)
4454 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4455 if (PL_egid != PL_gid)
4456 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4457 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4459 * Checks for UID/GID above "wrong": why disallow
4460 * perl -e 'print "Hello\n"'
4461 * from within setuid things?? Simply drop them: replaced by
4462 * fdscript/suidscript and #ifdef IAMSUID checks below.
4464 * This may be too late for command-line switches. Will catch those on
4465 * the #! line, after finding the script name and setting up
4466 * fdscript/suidscript. Note that suidperl does not get around to
4467 * parsing (and checking) the switches on the #! line, but checks that
4468 * the two sets are identical.
4470 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4471 * instead, or would that be "too late"? (We never have suidscript, can
4472 * we be sure to have fdscript?)
4474 * Catch things with suidscript (in descendant of suidperl), even with
4475 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4476 * below; but I am paranoid.
4478 * Also see comments about root running a setuid script, elsewhere.
4480 if (suidscript >= 0)
4481 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4483 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4484 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4485 #endif /* IAMSUID */
4489 Perl_init_debugger(pTHX)
4492 HV * const ostash = PL_curstash;
4494 PL_curstash = PL_debstash;
4495 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4497 AvREAL_off(PL_dbargs);
4498 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4499 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4500 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4501 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4502 sv_setiv(PL_DBsingle, 0);
4503 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4504 sv_setiv(PL_DBtrace, 0);
4505 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4506 sv_setiv(PL_DBsignal, 0);
4507 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4508 sv_setiv(PL_DBassertion, 0);
4509 PL_curstash = ostash;
4512 #ifndef STRESS_REALLOC
4513 #define REASONABLE(size) (size)
4515 #define REASONABLE(size) (1) /* unreasonable */
4519 Perl_init_stacks(pTHX)
4522 /* start with 128-item stack and 8K cxstack */
4523 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4524 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4525 PL_curstackinfo->si_type = PERLSI_MAIN;
4526 PL_curstack = PL_curstackinfo->si_stack;
4527 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4529 PL_stack_base = AvARRAY(PL_curstack);
4530 PL_stack_sp = PL_stack_base;
4531 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4533 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4536 PL_tmps_max = REASONABLE(128);
4538 Newx(PL_markstack,REASONABLE(32),I32);
4539 PL_markstack_ptr = PL_markstack;
4540 PL_markstack_max = PL_markstack + REASONABLE(32);
4544 Newx(PL_scopestack,REASONABLE(32),I32);
4545 PL_scopestack_ix = 0;
4546 PL_scopestack_max = REASONABLE(32);
4548 Newx(PL_savestack,REASONABLE(128),ANY);
4549 PL_savestack_ix = 0;
4550 PL_savestack_max = REASONABLE(128);
4559 while (PL_curstackinfo->si_next)
4560 PL_curstackinfo = PL_curstackinfo->si_next;
4561 while (PL_curstackinfo) {
4562 PERL_SI *p = PL_curstackinfo->si_prev;
4563 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4564 Safefree(PL_curstackinfo->si_cxstack);
4565 Safefree(PL_curstackinfo);
4566 PL_curstackinfo = p;
4568 Safefree(PL_tmps_stack);
4569 Safefree(PL_markstack);
4570 Safefree(PL_scopestack);
4571 Safefree(PL_savestack);
4576 S_init_predump_symbols(pTHX)
4582 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4583 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4584 GvMULTI_on(PL_stdingv);
4585 io = GvIOp(PL_stdingv);
4586 IoTYPE(io) = IoTYPE_RDONLY;
4587 IoIFP(io) = PerlIO_stdin();
4588 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4590 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4592 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4595 IoTYPE(io) = IoTYPE_WRONLY;
4596 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4598 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4600 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4602 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4603 GvMULTI_on(PL_stderrgv);
4604 io = GvIOp(PL_stderrgv);
4605 IoTYPE(io) = IoTYPE_WRONLY;
4606 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4607 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4609 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4611 PL_statname = newSV(0); /* last filename we did stat on */
4613 Safefree(PL_osname);
4614 PL_osname = savepv(OSNAME);
4618 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4621 argc--,argv++; /* skip name of script */
4622 if (PL_doswitches) {
4623 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4627 if (argv[0][1] == '-' && !argv[0][2]) {
4631 if ((s = strchr(argv[0], '='))) {
4632 const char *const start_name = argv[0] + 1;
4633 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4634 TRUE, SVt_PV)), s + 1);
4637 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4640 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4641 GvMULTI_on(PL_argvgv);
4642 (void)gv_AVadd(PL_argvgv);
4643 av_clear(GvAVn(PL_argvgv));
4644 for (; argc > 0; argc--,argv++) {
4645 SV * const sv = newSVpv(argv[0],0);
4646 av_push(GvAVn(PL_argvgv),sv);
4647 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4648 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4651 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4652 (void)sv_utf8_decode(sv);
4658 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4663 PL_toptarget = newSV_type(SVt_PVFM);
4664 sv_setpvn(PL_toptarget, "", 0);
4665 PL_bodytarget = newSV_type(SVt_PVFM);
4666 sv_setpvn(PL_bodytarget, "", 0);
4667 PL_formtarget = PL_bodytarget;
4671 init_argv_symbols(argc,argv);
4673 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4674 #ifdef MACOS_TRADITIONAL
4675 /* $0 is not majick on a Mac */
4676 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4678 sv_setpv(GvSV(tmpgv),PL_origfilename);
4679 magicname("0", "0", 1);
4682 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4684 bool env_is_not_environ;
4685 GvMULTI_on(PL_envgv);
4686 hv = GvHVn(PL_envgv);
4687 hv_magic(hv, NULL, PERL_MAGIC_env);
4689 #ifdef USE_ENVIRON_ARRAY
4690 /* Note that if the supplied env parameter is actually a copy
4691 of the global environ then it may now point to free'd memory
4692 if the environment has been modified since. To avoid this
4693 problem we treat env==NULL as meaning 'use the default'
4697 env_is_not_environ = env != environ;
4698 if (env_is_not_environ
4699 # ifdef USE_ITHREADS
4700 && PL_curinterp == aTHX
4709 for (; *env; env++) {
4710 if (!(s = strchr(*env,'=')) || s == *env)
4712 #if defined(MSDOS) && !defined(DJGPP)
4717 sv = newSVpv(s+1, 0);
4718 (void)hv_store(hv, *env, s - *env, sv, 0);
4719 if (env_is_not_environ)
4723 #endif /* USE_ENVIRON_ARRAY */
4724 #endif /* !PERL_MICRO */
4727 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4728 SvREADONLY_off(GvSV(tmpgv));
4729 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4730 SvREADONLY_on(GvSV(tmpgv));
4732 #ifdef THREADS_HAVE_PIDS
4733 PL_ppid = (IV)getppid();
4736 /* touch @F array to prevent spurious warnings 20020415 MJD */
4738 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4743 S_init_perllib(pTHX)
4749 s = PerlEnv_getenv("PERL5LIB");
4751 * It isn't possible to delete an environment variable with
4752 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4753 * case we treat PERL5LIB as undefined if it has a zero-length value.
4755 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4756 if (s && *s != '\0')
4760 incpush(s, TRUE, TRUE, TRUE, FALSE);
4762 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4764 /* Treat PERL5?LIB as a possible search list logical name -- the
4765 * "natural" VMS idiom for a Unix path string. We allow each
4766 * element to be a set of |-separated directories for compatibility.
4770 if (my_trnlnm("PERL5LIB",buf,0))
4771 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4773 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4777 /* Use the ~-expanded versions of APPLLIB (undocumented),
4778 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4781 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4785 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4787 #ifdef MACOS_TRADITIONAL
4790 SV * privdir = newSV(0);
4791 char * macperl = PerlEnv_getenv("MACPERL");
4796 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4797 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4798 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4799 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4800 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4801 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4803 SvREFCNT_dec(privdir);
4806 incpush(":", FALSE, FALSE, TRUE, FALSE);
4809 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4812 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4814 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4818 /* sitearch is always relative to sitelib on Windows for
4819 * DLL-based path intuition to work correctly */
4820 # if !defined(WIN32)
4821 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4827 /* this picks up sitearch as well */
4828 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4830 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4834 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4835 /* Search for version-specific dirs below here */
4836 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4839 #ifdef PERL_VENDORARCH_EXP
4840 /* vendorarch is always relative to vendorlib on Windows for
4841 * DLL-based path intuition to work correctly */
4842 # if !defined(WIN32)
4843 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4847 #ifdef PERL_VENDORLIB_EXP
4849 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4851 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4855 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4856 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4859 #ifdef PERL_OTHERLIBDIRS
4860 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4864 incpush(".", FALSE, FALSE, TRUE, FALSE);
4865 #endif /* MACOS_TRADITIONAL */
4868 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4869 # define PERLLIB_SEP ';'
4872 # define PERLLIB_SEP '|'
4874 # if defined(MACOS_TRADITIONAL)
4875 # define PERLLIB_SEP ','
4877 # define PERLLIB_SEP ':'
4881 #ifndef PERLLIB_MANGLE
4882 # define PERLLIB_MANGLE(s,n) (s)
4885 /* Push a directory onto @INC if it exists.
4886 Generate a new SV if we do this, to save needing to copy the SV we push
4889 S_incpush_if_exists(pTHX_ SV *dir)
4893 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4894 S_ISDIR(tmpstatbuf.st_mode)) {
4895 av_push(GvAVn(PL_incgv), dir);
4902 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4907 const char *p = dir;
4912 if (addsubdirs || addoldvers) {
4916 /* Break at all separators */
4918 SV *libdir = newSV(0);
4921 /* skip any consecutive separators */
4923 while ( *p == PERLLIB_SEP ) {
4924 /* Uncomment the next line for PATH semantics */
4925 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4930 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4931 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4936 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4937 p = NULL; /* break out */
4939 #ifdef MACOS_TRADITIONAL
4940 if (!strchr(SvPVX(libdir), ':')) {
4943 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4945 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4946 sv_catpvs(libdir, ":");
4949 /* Do the if() outside the #ifdef to avoid warnings about an unused
4952 #ifdef PERL_RELOCATABLE_INC
4954 * Relocatable include entries are marked with a leading .../
4957 * 0: Remove that leading ".../"
4958 * 1: Remove trailing executable name (anything after the last '/')
4959 * from the perl path to give a perl prefix
4961 * While the @INC element starts "../" and the prefix ends with a real
4962 * directory (ie not . or ..) chop that real directory off the prefix
4963 * and the leading "../" from the @INC element. ie a logical "../"
4965 * Finally concatenate the prefix and the remainder of the @INC element
4966 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4967 * generates /usr/local/lib/perl5
4969 const char *libpath = SvPVX(libdir);
4970 STRLEN libpath_len = SvCUR(libdir);
4971 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4973 SV * const caret_X = get_sv("\030", 0);
4974 /* Going to use the SV just as a scratch buffer holding a C
4980 /* $^X is *the* source of taint if tainting is on, hence
4981 SvPOK() won't be true. */
4983 assert(SvPOKp(caret_X));
4984 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4985 /* Firstly take off the leading .../
4986 If all else fail we'll do the paths relative to the current
4988 sv_chop(libdir, libpath + 4);
4989 /* Don't use SvPV as we're intentionally bypassing taining,
4990 mortal copies that the mg_get of tainting creates, and
4991 corruption that seems to come via the save stack.
4992 I guess that the save stack isn't correctly set up yet. */
4993 libpath = SvPVX(libdir);
4994 libpath_len = SvCUR(libdir);
4996 /* This would work more efficiently with memrchr, but as it's
4997 only a GNU extension we'd need to probe for it and
4998 implement our own. Not hard, but maybe not worth it? */
5000 prefix = SvPVX(prefix_sv);
5001 lastslash = strrchr(prefix, '/');
5003 /* First time in with the *lastslash = '\0' we just wipe off
5004 the trailing /perl from (say) /usr/foo/bin/perl
5008 while ((*lastslash = '\0'), /* Do that, come what may. */
5009 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5010 && (lastslash = strrchr(prefix, '/')))) {
5011 if (lastslash[1] == '\0'
5012 || (lastslash[1] == '.'
5013 && (lastslash[2] == '/' /* ends "/." */
5014 || (lastslash[2] == '/'
5015 && lastslash[3] == '/' /* or "/.." */
5017 /* Prefix ends "/" or "/." or "/..", any of which
5018 are fishy, so don't do any more logical cleanup.
5022 /* Remove leading "../" from path */
5025 /* Next iteration round the loop removes the last
5026 directory name from prefix by writing a '\0' in
5027 the while clause. */
5029 /* prefix has been terminated with a '\0' to the correct
5030 length. libpath points somewhere into the libdir SV.
5031 We need to join the 2 with '/' and drop the result into
5033 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5034 SvREFCNT_dec(libdir);
5035 /* And this is the new libdir. */
5038 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5039 /* Need to taint reloccated paths if running set ID */
5040 SvTAINTED_on(libdir);
5043 SvREFCNT_dec(prefix_sv);
5048 * BEFORE pushing libdir onto @INC we may first push version- and
5049 * archname-specific sub-directories.
5051 if (addsubdirs || addoldvers) {
5052 #ifdef PERL_INC_VERSION_LIST
5053 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5054 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5055 const char * const *incver;
5061 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5063 while (unix[len-1] == '/') len--; /* Cosmetic */
5064 sv_usepvn(libdir,unix,len);
5067 PerlIO_printf(Perl_error_log,
5068 "Failed to unixify @INC element \"%s\"\n",
5072 #ifdef MACOS_TRADITIONAL
5073 #define PERL_AV_SUFFIX_FMT ""
5074 #define PERL_ARCH_FMT "%s:"
5075 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5077 #define PERL_AV_SUFFIX_FMT "/"
5078 #define PERL_ARCH_FMT "/%s"
5079 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5081 /* .../version/archname if -d .../version/archname */
5082 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5084 (int)PERL_REVISION, (int)PERL_VERSION,
5085 (int)PERL_SUBVERSION, ARCHNAME);
5086 subdir = S_incpush_if_exists(aTHX_ subdir);
5088 /* .../version if -d .../version */
5089 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5091 (int)PERL_REVISION, (int)PERL_VERSION,
5092 (int)PERL_SUBVERSION);
5093 subdir = S_incpush_if_exists(aTHX_ subdir);
5095 /* .../archname if -d .../archname */
5096 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5097 SVfARG(libdir), ARCHNAME);
5098 subdir = S_incpush_if_exists(aTHX_ subdir);
5102 #ifdef PERL_INC_VERSION_LIST
5104 for (incver = incverlist; *incver; incver++) {
5105 /* .../xxx if -d .../xxx */
5106 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5107 SVfARG(libdir), *incver);
5108 subdir = S_incpush_if_exists(aTHX_ subdir);
5114 /* finally push this lib directory on the end of @INC */
5115 av_push(GvAVn(PL_incgv), libdir);
5118 assert (SvREFCNT(subdir) == 1);
5119 SvREFCNT_dec(subdir);
5125 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5129 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5135 while (av_len(paramList) >= 0) {
5136 cv = (CV*)av_shift(paramList);
5138 if (paramList == PL_beginav) {
5139 /* save PL_beginav for compiler */
5140 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5142 else if (paramList == PL_checkav) {
5143 /* save PL_checkav for compiler */
5144 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5146 else if (paramList == PL_unitcheckav) {
5147 /* save PL_unitcheckav for compiler */
5148 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5159 PL_madskills |= 16384;
5164 PL_madskills &= ~16384;
5167 (void)SvPV_const(atsv, len);
5169 PL_curcop = &PL_compiling;
5170 CopLINE_set(PL_curcop, oldline);
5171 if (paramList == PL_beginav)
5172 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5174 Perl_sv_catpvf(aTHX_ atsv,
5175 "%s failed--call queue aborted",
5176 paramList == PL_checkav ? "CHECK"
5177 : paramList == PL_initav ? "INIT"
5178 : paramList == PL_unitcheckav ? "UNITCHECK"
5180 while (PL_scopestack_ix > oldscope)
5183 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5190 /* my_exit() was called */
5191 while (PL_scopestack_ix > oldscope)
5194 PL_curstash = PL_defstash;
5195 PL_curcop = &PL_compiling;
5196 CopLINE_set(PL_curcop, oldline);
5198 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5199 if (paramList == PL_beginav)
5200 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5202 Perl_croak(aTHX_ "%s failed--call queue aborted",
5203 paramList == PL_checkav ? "CHECK"
5204 : paramList == PL_initav ? "INIT"
5205 : paramList == PL_unitcheckav ? "UNITCHECK"
5212 PL_curcop = &PL_compiling;
5213 CopLINE_set(PL_curcop, oldline);
5216 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5225 Perl_my_exit(pTHX_ U32 status)
5228 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5229 (void*)thr, (unsigned long) status));
5238 STATUS_EXIT_SET(status);
5245 Perl_my_failure_exit(pTHX)
5249 /* We have been called to fall on our sword. The desired exit code
5250 * should be already set in STATUS_UNIX, but could be shifted over
5251 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5254 * If an error code has not been set, then force the issue.
5256 if (MY_POSIX_EXIT) {
5258 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5259 * the exit code when there isn't an error.
5262 if (STATUS_UNIX == 0)
5263 STATUS_UNIX_EXIT_SET(255);
5265 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5267 /* The exit code could have been set by $? or vmsish which
5268 * means that it may not be fatal. So convert
5269 * success/warning codes to fatal.
5271 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5272 STATUS_UNIX_EXIT_SET(255);
5276 /* Traditionally Perl on VMS always expects a Fatal Error. */
5277 if (vaxc$errno & 1) {
5279 /* So force success status to failure */
5280 if (STATUS_NATIVE & 1)
5285 STATUS_UNIX = EINTR; /* In case something cares */
5290 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5292 /* Encode the severity code */
5293 severity = STATUS_NATIVE & STS$M_SEVERITY;
5294 STATUS_UNIX = (severity ? severity : 1) << 8;
5296 /* Perl expects this to be a fatal error */
5297 if (severity != STS$K_SEVERE)
5306 STATUS_UNIX_SET(errno);
5308 exitstatus = STATUS_UNIX >> 8;
5309 if (exitstatus & 255)
5310 STATUS_UNIX_SET(exitstatus);
5312 STATUS_UNIX_SET(255);
5319 S_my_exit_jump(pTHX)
5324 SvREFCNT_dec(PL_e_script);
5328 POPSTACK_TO(PL_mainstack);
5336 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5339 const char * const p = SvPVX_const(PL_e_script);
5340 const char *nl = strchr(p, '\n');
5342 PERL_UNUSED_ARG(idx);
5343 PERL_UNUSED_ARG(maxlen);
5345 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5347 filter_del(read_e_script);
5350 sv_catpvn(buf_sv, p, nl-p);
5351 sv_chop(PL_e_script, nl);
5357 * c-indentation-style: bsd
5359 * indent-tabs-mode: t
5362 * ex: set ts=8 sts=4 sw=4 noet: