3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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);
175 PERL_SET_THX(my_perl);
179 #ifdef PERL_IMPLICIT_SYS
181 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
182 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
183 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
184 struct IPerlDir* ipD, struct IPerlSock* ipS,
185 struct IPerlProc* ipP)
187 PerlInterpreter *my_perl;
188 /* Newx() needs interpreter, so call malloc() instead */
189 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
190 S_init_tls_and_interp(my_perl);
191 Zero(my_perl, 1, PerlInterpreter);
201 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 =head1 Embedding Functions
210 =for apidoc perl_alloc
212 Allocates a new Perl interpreter. See L<perlembed>.
220 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 S_init_tls_and_interp(my_perl);
226 #ifndef PERL_TRACK_MEMPOOL
227 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
229 Zero(my_perl, 1, PerlInterpreter);
230 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
234 #endif /* PERL_IMPLICIT_SYS */
237 =for apidoc perl_construct
239 Initializes a new Perl interpreter. See L<perlembed>.
245 perl_construct(pTHXx)
248 PERL_UNUSED_ARG(my_perl);
251 PL_perl_destruct_level = 1;
253 if (PL_perl_destruct_level > 0)
256 /* Init the real globals (and main thread)? */
258 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
260 PL_linestr = newSV(79);
261 sv_upgrade(PL_linestr,SVt_PVIV);
263 if (!SvREADONLY(&PL_sv_undef)) {
264 /* set read-only and try to insure than we wont see REFCNT==0
267 SvREADONLY_on(&PL_sv_undef);
268 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
270 sv_setpv(&PL_sv_no,PL_No);
271 /* value lookup in void context - happens to have the side effect
272 of caching the numeric forms. */
275 SvREADONLY_on(&PL_sv_no);
276 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
278 sv_setpv(&PL_sv_yes,PL_Yes);
281 SvREADONLY_on(&PL_sv_yes);
282 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
284 SvREADONLY_on(&PL_sv_placeholder);
285 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
288 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
289 #ifdef PERL_USES_PL_PIDSTATUS
290 PL_pidstatus = newHV();
294 PL_rs = newSVpvs("\n");
299 PL_lex_state = LEX_NOTPARSING;
305 SET_NUMERIC_STANDARD();
307 #if defined(LOCAL_PATCH_COUNT)
308 PL_localpatches = local_patches; /* For possible -v */
311 #ifdef HAVE_INTERP_INTERN
315 PerlIO_init(aTHX); /* Hook to IO system */
317 PL_fdpid = newAV(); /* for remembering popen pids by fd */
318 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
319 PL_errors = newSVpvs("");
320 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
321 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
322 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
324 PL_regex_padav = newAV();
325 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
326 PL_regex_pad = AvARRAY(PL_regex_padav);
328 #ifdef USE_REENTRANT_API
329 Perl_reentrant_init(aTHX);
332 /* Note that strtab is a rather special HV. Assumptions are made
333 about not iterating on it, and not adding tie magic to it.
334 It is properly deallocated in perl_destruct() */
337 HvSHAREKEYS_off(PL_strtab); /* mandatory */
338 hv_ksplit(PL_strtab, 512);
340 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
341 _dyld_lookup_and_bind
342 ("__environ", (unsigned long *) &environ_pointer, NULL);
346 # ifdef USE_ENVIRON_ARRAY
347 PL_origenviron = environ;
351 /* Use sysconf(_SC_CLK_TCK) if available, if not
352 * available or if the sysconf() fails, use the HZ.
353 * BeOS has those, but returns the wrong value.
354 * The HZ if not originally defined has been by now
355 * been defined as CLK_TCK, if available. */
356 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
357 PL_clocktick = sysconf(_SC_CLK_TCK);
358 if (PL_clocktick <= 0)
362 PL_stashcache = newHV();
364 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
365 (int)PERL_VERSION, (int)PERL_SUBVERSION);
368 if (!PL_mmap_page_size) {
369 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
371 SETERRNO(0, SS_NORMAL);
373 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
375 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
377 if ((long) PL_mmap_page_size < 0) {
379 SV * const error = ERRSV;
380 SvUPGRADE(error, SVt_PV);
381 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
384 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
388 # ifdef HAS_GETPAGESIZE
389 PL_mmap_page_size = getpagesize();
391 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
392 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
396 if (PL_mmap_page_size <= 0)
397 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
398 (IV) PL_mmap_page_size);
400 #endif /* HAS_MMAP */
402 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
403 PL_timesbase.tms_utime = 0;
404 PL_timesbase.tms_stime = 0;
405 PL_timesbase.tms_cutime = 0;
406 PL_timesbase.tms_cstime = 0;
417 =for apidoc nothreadhook
419 Stub that provides thread hook for perl_destruct when there are
426 Perl_nothreadhook(pTHX)
432 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
434 Perl_dump_sv_child(pTHX_ SV *sv)
437 const int sock = PL_dumper_fd;
438 const int debug_fd = PerlIO_fileno(Perl_debug_log);
439 union control_un control;
442 struct cmsghdr *cmptr;
444 unsigned char buffer[256];
446 if(sock == -1 || debug_fd == -1)
449 PerlIO_flush(Perl_debug_log);
451 /* All these shenanigans are to pass a file descriptor over to our child for
452 it to dump out to. We can't let it hold open the file descriptor when it
453 forks, as the file descriptor it will dump to can turn out to be one end
454 of pipe that some other process will wait on for EOF. (So as it would
455 be open, the wait would be forever. */
457 msg.msg_control = control.control;
458 msg.msg_controllen = sizeof(control.control);
459 /* We're a connected socket so we don't need a destination */
465 cmptr = CMSG_FIRSTHDR(&msg);
466 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
467 cmptr->cmsg_level = SOL_SOCKET;
468 cmptr->cmsg_type = SCM_RIGHTS;
469 *((int *)CMSG_DATA(cmptr)) = 1;
471 vec[0].iov_base = (void*)&sv;
472 vec[0].iov_len = sizeof(sv);
473 got = sendmsg(sock, &msg, 0);
476 perror("Debug leaking scalars parent sendmsg failed");
479 if(got < sizeof(sv)) {
480 perror("Debug leaking scalars parent short sendmsg");
484 /* Return protocol is
486 unsigned char: length of location string (0 for empty)
487 unsigned char*: string (not terminated)
489 vec[0].iov_base = (void*)&returned_errno;
490 vec[0].iov_len = sizeof(returned_errno);
491 vec[1].iov_base = buffer;
494 got = readv(sock, vec, 2);
497 perror("Debug leaking scalars parent read failed");
498 PerlIO_flush(PerlIO_stderr());
501 if(got < sizeof(returned_errno) + 1) {
502 perror("Debug leaking scalars parent short read");
503 PerlIO_flush(PerlIO_stderr());
508 got = read(sock, buffer + 1, *buffer);
510 perror("Debug leaking scalars parent read 2 failed");
511 PerlIO_flush(PerlIO_stderr());
516 perror("Debug leaking scalars parent short read 2");
517 PerlIO_flush(PerlIO_stderr());
522 if (returned_errno || *buffer) {
523 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
524 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
525 returned_errno, strerror(returned_errno));
531 =for apidoc perl_destruct
533 Shuts down a Perl interpreter. See L<perlembed>.
542 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
544 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
548 PERL_UNUSED_ARG(my_perl);
550 /* wait for all pseudo-forked children to finish */
551 PERL_WAIT_FOR_CHILDREN;
553 destruct_level = PL_perl_destruct_level;
556 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
558 const int i = atoi(s);
559 if (destruct_level < i)
565 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
571 if (PL_endav && !PL_minus_c)
572 call_list(PL_scopestack_ix, PL_endav);
578 /* Need to flush since END blocks can produce output */
581 if (CALL_FPTR(PL_threadhook)(aTHX)) {
582 /* Threads hook has vetoed further cleanup */
586 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
587 if (destruct_level != 0) {
588 /* Fork here to create a child. Our child's job is to preserve the
589 state of scalars prior to destruction, so that we can instruct it
590 to dump any scalars that we later find have leaked.
591 There's no subtlety in this code - it assumes POSIX, and it doesn't
595 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
596 perror("Debug leaking scalars socketpair failed");
602 perror("Debug leaking scalars fork failed");
606 /* We are the child */
607 const int sock = fd[1];
608 const int debug_fd = PerlIO_fileno(Perl_debug_log);
611 /* Our success message is an integer 0, and a char 0 */
612 static const char success[sizeof(int) + 1];
616 /* We need to close all other file descriptors otherwise we end up
617 with interesting hangs, where the parent closes its end of a
618 pipe, and sits waiting for (another) child to terminate. Only
619 that child never terminates, because it never gets EOF, because
620 we also have the far end of the pipe open. We even need to
621 close the debugging fd, because sometimes it happens to be one
622 end of a pipe, and a process is waiting on the other end for
623 EOF. Normally it would be closed at some point earlier in
624 destruction, but if we happen to cause the pipe to remain open,
625 EOF never occurs, and we get an infinite hang. Hence all the
626 games to pass in a file descriptor if it's actually needed. */
628 f = sysconf(_SC_OPEN_MAX);
630 where = "sysconf failed";
641 union control_un control;
644 struct cmsghdr *cmptr;
648 msg.msg_control = control.control;
649 msg.msg_controllen = sizeof(control.control);
650 /* We're a connected socket so we don't need a source */
654 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
656 vec[0].iov_base = (void*)⌖
657 vec[0].iov_len = sizeof(target);
659 got = recvmsg(sock, &msg, 0);
664 where = "recv failed";
667 if(got < sizeof(target)) {
668 where = "short recv";
672 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
676 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
677 where = "wrong cmsg_len";
680 if(cmptr->cmsg_level != SOL_SOCKET) {
681 where = "wrong cmsg_level";
684 if(cmptr->cmsg_type != SCM_RIGHTS) {
685 where = "wrong cmsg_type";
689 got_fd = *(int*)CMSG_DATA(cmptr);
690 /* For our last little bit of trickery, put the file descriptor
691 back into Perl_debug_log, as if we never actually closed it
693 if(got_fd != debug_fd) {
694 if (dup2(got_fd, debug_fd) == -1) {
701 PerlIO_flush(Perl_debug_log);
703 got = write(sock, &success, sizeof(success));
706 where = "write failed";
709 if(got < sizeof(success)) {
710 where = "short write";
717 int send_errno = errno;
718 unsigned char length = (unsigned char) strlen(where);
719 struct iovec failure[3] = {
720 {(void*)&send_errno, sizeof(send_errno)},
722 {(void*)where, length}
724 int got = writev(sock, failure, 3);
725 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
726 in the parent if we try to read from the socketpair after the
727 child has exited, even if there was data to read.
728 So sleep a bit to give the parent a fighting chance of
731 _exit((got == -1) ? errno : 0);
735 PL_dumper_fd = fd[0];
740 /* We must account for everything. */
742 /* Destroy the main CV and syntax tree */
743 /* Do this now, because destroying ops can cause new SVs to be generated
744 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
745 PL_curcop to point to a valid op from which the filename structure
747 PL_curcop = &PL_compiling;
749 /* ensure comppad/curpad to refer to main's pad */
750 if (CvPADLIST(PL_main_cv)) {
751 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
753 op_free(PL_main_root);
756 PL_main_start = NULL;
757 SvREFCNT_dec(PL_main_cv);
761 /* Tell PerlIO we are about to tear things apart in case
762 we have layers which are using resources that should
766 PerlIO_destruct(aTHX);
768 if (PL_sv_objcount) {
770 * Try to destruct global references. We do this first so that the
771 * destructors and destructees still exist. Some sv's might remain.
772 * Non-referenced objects are on their own.
776 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
777 PL_defoutgv = NULL; /* may have been freed */
780 /* unhook hooks which will soon be, or use, destroyed data */
781 SvREFCNT_dec(PL_warnhook);
783 SvREFCNT_dec(PL_diehook);
786 /* call exit list functions */
787 while (PL_exitlistlen-- > 0)
788 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
790 Safefree(PL_exitlist);
795 if (destruct_level == 0){
797 DEBUG_P(debprofdump());
799 #if defined(PERLIO_LAYERS)
800 /* No more IO - including error messages ! */
801 PerlIO_cleanup(aTHX);
804 /* The exit() function will do everything that needs doing. */
808 /* jettison our possibly duplicated environment */
809 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
810 * so we certainly shouldn't free it here
813 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
814 if (environ != PL_origenviron && !PL_use_safe_putenv
816 /* only main thread can free environ[0] contents */
817 && PL_curinterp == aTHX
823 for (i = 0; environ[i]; i++)
824 safesysfree(environ[i]);
826 /* Must use safesysfree() when working with environ. */
827 safesysfree(environ);
829 environ = PL_origenviron;
832 #endif /* !PERL_MICRO */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
844 I32 i = AvFILLp(PL_regex_padav) + 1;
845 SV * const * const ary = AvARRAY(PL_regex_padav);
848 SV * const resv = ary[--i];
850 if (SvFLAGS(resv) & SVf_BREAK) {
851 /* this is PL_reg_curpm, already freed
852 * flag is set in regexec.c:S_regtry
854 SvFLAGS(resv) &= ~SVf_BREAK;
856 else if(SvREPADTMP(resv)) {
857 SvREPADTMP_off(resv);
859 else if(SvIOKp(resv)) {
860 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
865 SvREFCNT_dec(PL_regex_padav);
866 PL_regex_padav = NULL;
870 SvREFCNT_dec((SV*) PL_stashcache);
871 PL_stashcache = NULL;
873 /* loosen bonds of global variables */
876 (void)PerlIO_close(PL_rsfp);
880 /* Filters for program text */
881 SvREFCNT_dec(PL_rsfp_filters);
882 PL_rsfp_filters = NULL;
885 PL_preprocess = FALSE;
891 PL_doswitches = FALSE;
892 PL_dowarn = G_WARN_OFF;
893 PL_doextract = FALSE;
894 PL_sawampersand = FALSE; /* must save all match strings */
897 Safefree(PL_inplace);
899 SvREFCNT_dec(PL_patchlevel);
902 SvREFCNT_dec(PL_e_script);
908 /* magical thingies */
910 SvREFCNT_dec(PL_ofs_sv); /* $, */
913 SvREFCNT_dec(PL_ors_sv); /* $\ */
916 SvREFCNT_dec(PL_rs); /* $/ */
919 Safefree(PL_osname); /* $^O */
922 SvREFCNT_dec(PL_statname);
926 /* defgv, aka *_ should be taken care of elsewhere */
928 /* clean up after study() */
929 SvREFCNT_dec(PL_lastscream);
930 PL_lastscream = NULL;
931 Safefree(PL_screamfirst);
933 Safefree(PL_screamnext);
937 Safefree(PL_efloatbuf);
941 /* startup and shutdown function lists */
942 SvREFCNT_dec(PL_beginav);
943 SvREFCNT_dec(PL_beginav_save);
944 SvREFCNT_dec(PL_endav);
945 SvREFCNT_dec(PL_checkav);
946 SvREFCNT_dec(PL_checkav_save);
947 SvREFCNT_dec(PL_unitcheckav);
948 SvREFCNT_dec(PL_unitcheckav_save);
949 SvREFCNT_dec(PL_initav);
951 PL_beginav_save = NULL;
954 PL_checkav_save = NULL;
955 PL_unitcheckav = NULL;
956 PL_unitcheckav_save = NULL;
959 /* shortcuts just get cleared */
968 PL_last_in_gv = NULL;
976 PL_DBassertion = NULL;
981 SvREFCNT_dec(PL_argvout_stack);
982 PL_argvout_stack = NULL;
984 SvREFCNT_dec(PL_modglobal);
986 SvREFCNT_dec(PL_preambleav);
987 PL_preambleav = NULL;
988 SvREFCNT_dec(PL_subname);
990 SvREFCNT_dec(PL_linestr);
992 #ifdef PERL_USES_PL_PIDSTATUS
993 SvREFCNT_dec(PL_pidstatus);
996 SvREFCNT_dec(PL_toptarget);
998 SvREFCNT_dec(PL_bodytarget);
999 PL_bodytarget = NULL;
1000 PL_formtarget = NULL;
1002 /* free locale stuff */
1003 #ifdef USE_LOCALE_COLLATE
1004 Safefree(PL_collation_name);
1005 PL_collation_name = NULL;
1008 #ifdef USE_LOCALE_NUMERIC
1009 Safefree(PL_numeric_name);
1010 PL_numeric_name = NULL;
1011 SvREFCNT_dec(PL_numeric_radix_sv);
1012 PL_numeric_radix_sv = NULL;
1015 /* clear utf8 character classes */
1016 SvREFCNT_dec(PL_utf8_alnum);
1017 SvREFCNT_dec(PL_utf8_alnumc);
1018 SvREFCNT_dec(PL_utf8_ascii);
1019 SvREFCNT_dec(PL_utf8_alpha);
1020 SvREFCNT_dec(PL_utf8_space);
1021 SvREFCNT_dec(PL_utf8_cntrl);
1022 SvREFCNT_dec(PL_utf8_graph);
1023 SvREFCNT_dec(PL_utf8_digit);
1024 SvREFCNT_dec(PL_utf8_upper);
1025 SvREFCNT_dec(PL_utf8_lower);
1026 SvREFCNT_dec(PL_utf8_print);
1027 SvREFCNT_dec(PL_utf8_punct);
1028 SvREFCNT_dec(PL_utf8_xdigit);
1029 SvREFCNT_dec(PL_utf8_mark);
1030 SvREFCNT_dec(PL_utf8_toupper);
1031 SvREFCNT_dec(PL_utf8_totitle);
1032 SvREFCNT_dec(PL_utf8_tolower);
1033 SvREFCNT_dec(PL_utf8_tofold);
1034 SvREFCNT_dec(PL_utf8_idstart);
1035 SvREFCNT_dec(PL_utf8_idcont);
1036 PL_utf8_alnum = NULL;
1037 PL_utf8_alnumc = NULL;
1038 PL_utf8_ascii = NULL;
1039 PL_utf8_alpha = NULL;
1040 PL_utf8_space = NULL;
1041 PL_utf8_cntrl = NULL;
1042 PL_utf8_graph = NULL;
1043 PL_utf8_digit = NULL;
1044 PL_utf8_upper = NULL;
1045 PL_utf8_lower = NULL;
1046 PL_utf8_print = NULL;
1047 PL_utf8_punct = NULL;
1048 PL_utf8_xdigit = NULL;
1049 PL_utf8_mark = NULL;
1050 PL_utf8_toupper = NULL;
1051 PL_utf8_totitle = NULL;
1052 PL_utf8_tolower = NULL;
1053 PL_utf8_tofold = NULL;
1054 PL_utf8_idstart = NULL;
1055 PL_utf8_idcont = NULL;
1057 if (!specialWARN(PL_compiling.cop_warnings))
1058 PerlMemShared_free(PL_compiling.cop_warnings);
1059 PL_compiling.cop_warnings = NULL;
1060 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1061 PL_compiling.cop_hints_hash = NULL;
1062 CopFILE_free(&PL_compiling);
1063 CopSTASH_free(&PL_compiling);
1065 /* Prepare to destruct main symbol table. */
1070 SvREFCNT_dec(PL_curstname);
1071 PL_curstname = NULL;
1073 /* clear queued errors */
1074 SvREFCNT_dec(PL_errors);
1078 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1079 if (PL_scopestack_ix != 0)
1080 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1081 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1082 (long)PL_scopestack_ix);
1083 if (PL_savestack_ix != 0)
1084 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1085 "Unbalanced saves: %ld more saves than restores\n",
1086 (long)PL_savestack_ix);
1087 if (PL_tmps_floor != -1)
1088 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1089 (long)PL_tmps_floor + 1);
1090 if (cxstack_ix != -1)
1091 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1092 (long)cxstack_ix + 1);
1095 /* Now absolutely destruct everything, somehow or other, loops or no. */
1096 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1097 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1099 /* the 2 is for PL_fdpid and PL_strtab */
1100 while (PL_sv_count > 2 && sv_clean_all())
1103 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1104 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1105 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1106 SvFLAGS(PL_strtab) |= SVt_PVHV;
1108 AvREAL_off(PL_fdpid); /* no surviving entries */
1109 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1112 #ifdef HAVE_INTERP_INTERN
1116 /* Destruct the global string table. */
1118 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1119 * so that sv_free() won't fail on them.
1120 * Now that the global string table is using a single hunk of memory
1121 * for both HE and HEK, we either need to explicitly unshare it the
1122 * correct way, or actually free things here.
1125 const I32 max = HvMAX(PL_strtab);
1126 HE * const * const array = HvARRAY(PL_strtab);
1127 HE *hent = array[0];
1130 if (hent && ckWARN_d(WARN_INTERNAL)) {
1131 HE * const next = HeNEXT(hent);
1132 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1133 "Unbalanced string table refcount: (%ld) for \"%s\"",
1134 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1141 hent = array[riter];
1146 HvARRAY(PL_strtab) = 0;
1147 HvTOTALKEYS(PL_strtab) = 0;
1148 HvFILL(PL_strtab) = 0;
1150 SvREFCNT_dec(PL_strtab);
1153 /* free the pointer tables used for cloning */
1154 ptr_table_free(PL_ptr_table);
1155 PL_ptr_table = (PTR_TBL_t*)NULL;
1158 /* free special SVs */
1160 SvREFCNT(&PL_sv_yes) = 0;
1161 sv_clear(&PL_sv_yes);
1162 SvANY(&PL_sv_yes) = NULL;
1163 SvFLAGS(&PL_sv_yes) = 0;
1165 SvREFCNT(&PL_sv_no) = 0;
1166 sv_clear(&PL_sv_no);
1167 SvANY(&PL_sv_no) = NULL;
1168 SvFLAGS(&PL_sv_no) = 0;
1172 for (i=0; i<=2; i++) {
1173 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1174 sv_clear(PERL_DEBUG_PAD(i));
1175 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1176 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1180 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1181 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1183 #ifdef DEBUG_LEAKING_SCALARS
1184 if (PL_sv_count != 0) {
1189 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1190 svend = &sva[SvREFCNT(sva)];
1191 for (sv = sva + 1; sv < svend; ++sv) {
1192 if (SvTYPE(sv) != SVTYPEMASK) {
1193 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1195 " refcnt=%"UVuf pTHX__FORMAT "\n"
1196 "\tallocated at %s:%d %s %s%s\n",
1197 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1198 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1200 sv->sv_debug_inpad ? "for" : "by",
1201 sv->sv_debug_optype ?
1202 PL_op_name[sv->sv_debug_optype]: "(none)",
1203 sv->sv_debug_cloned ? " (cloned)" : ""
1205 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1206 Perl_dump_sv_child(aTHX_ sv);
1212 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1216 /* Wait for up to 4 seconds for child to terminate.
1217 This seems to be the least effort way of timing out on reaping
1219 struct timeval waitfor = {4, 0};
1220 int sock = PL_dumper_fd;
1224 FD_SET(sock, &rset);
1225 select(sock + 1, &rset, NULL, NULL, &waitfor);
1226 waitpid(child, &status, WNOHANG);
1234 #if defined(PERLIO_LAYERS)
1235 /* No more IO - including error messages ! */
1236 PerlIO_cleanup(aTHX);
1239 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1240 as currently layers use it rather than NULL as a marker
1241 for no arg - and will try and SvREFCNT_dec it.
1243 SvREFCNT(&PL_sv_undef) = 0;
1244 SvREADONLY_off(&PL_sv_undef);
1246 Safefree(PL_origfilename);
1247 PL_origfilename = NULL;
1248 Safefree(PL_reg_start_tmp);
1249 PL_reg_start_tmp = (char**)NULL;
1250 PL_reg_start_tmpl = 0;
1251 Safefree(PL_reg_curpm);
1252 Safefree(PL_reg_poscache);
1253 free_tied_hv_pool();
1254 Safefree(PL_op_mask);
1255 Safefree(PL_psig_ptr);
1256 PL_psig_ptr = (SV**)NULL;
1257 Safefree(PL_psig_name);
1258 PL_psig_name = (SV**)NULL;
1259 Safefree(PL_bitcount);
1261 Safefree(PL_psig_pend);
1262 PL_psig_pend = (int*)NULL;
1265 PL_tainting = FALSE;
1266 PL_taint_warn = FALSE;
1267 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1270 DEBUG_P(debprofdump());
1272 #ifdef USE_REENTRANT_API
1273 Perl_reentrant_free(aTHX);
1278 while (PL_regmatch_slab) {
1279 regmatch_slab *s = PL_regmatch_slab;
1280 PL_regmatch_slab = PL_regmatch_slab->next;
1284 /* As the absolutely last thing, free the non-arena SV for mess() */
1287 /* we know that type == SVt_PVMG */
1289 /* it could have accumulated taint magic */
1292 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1293 moremagic = mg->mg_moremagic;
1294 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1296 Safefree(mg->mg_ptr);
1300 /* we know that type >= SVt_PV */
1301 SvPV_free(PL_mess_sv);
1302 Safefree(SvANY(PL_mess_sv));
1303 Safefree(PL_mess_sv);
1310 =for apidoc perl_free
1312 Releases a Perl interpreter. See L<perlembed>.
1320 #ifdef PERL_TRACK_MEMPOOL
1323 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1324 * value as we're probably hunting memory leaks then
1326 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1327 if (!s || atoi(s) == 0) {
1328 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1329 thread at thread exit. */
1330 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1331 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1336 #if defined(WIN32) || defined(NETWARE)
1337 # if defined(PERL_IMPLICIT_SYS)
1340 void *host = nw_internal_host;
1342 void *host = w32_internal_host;
1344 PerlMem_free(aTHXx);
1346 nw_delete_internal_host(host);
1348 win32_delete_internal_host(host);
1352 PerlMem_free(aTHXx);
1355 PerlMem_free(aTHXx);
1359 #if defined(USE_ITHREADS)
1360 /* provide destructors to clean up the thread key when libperl is unloaded */
1361 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1363 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1364 #pragma fini "perl_fini"
1365 #elif defined(__sun) && !defined(__GNUC__)
1366 #pragma fini (perl_fini)
1370 #if defined(__GNUC__)
1371 __attribute__((destructor))
1381 #endif /* THREADS */
1384 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1387 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1388 PL_exitlist[PL_exitlistlen].fn = fn;
1389 PL_exitlist[PL_exitlistlen].ptr = ptr;
1393 #ifdef HAS_PROCSELFEXE
1394 /* This is a function so that we don't hold on to MAXPATHLEN
1395 bytes of stack longer than necessary
1398 S_procself_val(pTHX_ SV *sv, const char *arg0)
1400 char buf[MAXPATHLEN];
1401 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1403 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1404 includes a spurious NUL which will cause $^X to fail in system
1405 or backticks (this will prevent extensions from being built and
1406 many tests from working). readlink is not meant to add a NUL.
1407 Normal readlink works fine.
1409 if (len > 0 && buf[len-1] == '\0') {
1413 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1414 returning the text "unknown" from the readlink rather than the path
1415 to the executable (or returning an error from the readlink). Any valid
1416 path has a '/' in it somewhere, so use that to validate the result.
1417 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1419 if (len > 0 && memchr(buf, '/', len)) {
1420 sv_setpvn(sv,buf,len);
1426 #endif /* HAS_PROCSELFEXE */
1429 S_set_caret_X(pTHX) {
1431 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1433 #ifdef HAS_PROCSELFEXE
1434 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1437 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1439 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1446 =for apidoc perl_parse
1448 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1454 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1461 PERL_UNUSED_ARG(my_perl);
1463 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1466 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1467 setuid perl scripts securely.\n");
1468 #endif /* IAMSUID */
1471 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1472 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1473 * This MUST be done before any hash stores or fetches take place.
1474 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1475 * yourself, it is your responsibility to provide a good random seed!
1476 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1477 if (!PL_rehash_seed_set)
1478 PL_rehash_seed = get_hash_seed();
1480 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1482 if (s && (atoi(s) == 1))
1483 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1485 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1490 if (PL_origalen != 0) {
1491 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1494 /* Set PL_origalen be the sum of the contiguous argv[]
1495 * elements plus the size of the env in case that it is
1496 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1497 * as the maximum modifiable length of $0. In the worst case
1498 * the area we are able to modify is limited to the size of
1499 * the original argv[0]. (See below for 'contiguous', though.)
1501 const char *s = NULL;
1504 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1505 /* Do the mask check only if the args seem like aligned. */
1507 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1509 /* See if all the arguments are contiguous in memory. Note
1510 * that 'contiguous' is a loose term because some platforms
1511 * align the argv[] and the envp[]. If the arguments look
1512 * like non-aligned, assume that they are 'strictly' or
1513 * 'traditionally' contiguous. If the arguments look like
1514 * aligned, we just check that they are within aligned
1515 * PTRSIZE bytes. As long as no system has something bizarre
1516 * like the argv[] interleaved with some other data, we are
1517 * fine. (Did I just evoke Murphy's Law?) --jhi */
1518 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1520 for (i = 1; i < PL_origargc; i++) {
1521 if ((PL_origargv[i] == s + 1
1523 || PL_origargv[i] == s + 2
1528 (PL_origargv[i] > s &&
1530 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1540 /* Can we grab env area too to be used as the area for $0? */
1541 if (s && PL_origenviron) {
1542 if ((PL_origenviron[0] == s + 1
1544 || (PL_origenviron[0] == s + 9 && (s += 8))
1549 (PL_origenviron[0] > s &&
1550 PL_origenviron[0] <=
1551 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1555 s = PL_origenviron[0];
1558 my_setenv("NoNe SuCh", NULL);
1559 /* Force copy of environment. */
1560 for (i = 1; PL_origenviron[i]; i++) {
1561 if (PL_origenviron[i] == s + 1
1564 (PL_origenviron[i] > s &&
1565 PL_origenviron[i] <=
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1569 s = PL_origenviron[i];
1577 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1582 /* Come here if running an undumped a.out. */
1584 PL_origfilename = savepv(argv[0]);
1585 PL_do_undump = FALSE;
1586 cxstack_ix = -1; /* start label stack again */
1588 assert (!PL_tainted);
1590 S_set_caret_X(aTHX);
1592 init_postdump_symbols(argc,argv,env);
1597 op_free(PL_main_root);
1598 PL_main_root = NULL;
1600 PL_main_start = NULL;
1601 SvREFCNT_dec(PL_main_cv);
1605 oldscope = PL_scopestack_ix;
1606 PL_dowarn = G_WARN_OFF;
1611 parse_body(env,xsinit);
1613 call_list(oldscope, PL_unitcheckav);
1615 call_list(oldscope, PL_checkav);
1622 /* my_exit() was called */
1623 while (PL_scopestack_ix > oldscope)
1626 PL_curstash = PL_defstash;
1628 call_list(oldscope, PL_unitcheckav);
1630 call_list(oldscope, PL_checkav);
1634 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1643 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1646 int argc = PL_origargc;
1647 char **argv = PL_origargv;
1648 const char *scriptname = NULL;
1649 VOL bool dosearch = FALSE;
1650 const char *validarg = "";
1653 const char *cddir = NULL;
1654 #ifdef USE_SITECUSTOMIZE
1655 bool minus_f = FALSE;
1658 sv_setpvn(PL_linestr,"",0);
1659 sv = newSVpvs(""); /* first used for -I flags */
1663 for (argc--,argv++; argc > 0; argc--,argv++) {
1664 if (argv[0][0] != '-' || !argv[0][1])
1668 validarg = " PHOOEY ";
1672 * Can we rely on the kernel to start scripts with argv[1] set to
1673 * contain all #! line switches (the whole line)? (argv[0] is set to
1674 * the interpreter name, argv[2] to the script name; argv[3] and
1675 * above may contain other arguments.)
1682 #ifndef PERL_STRICT_CR
1707 if ((s = moreswitches(s)))
1712 CHECK_MALLOC_TOO_LATE_FOR('t');
1713 if( !PL_tainting ) {
1714 PL_taint_warn = TRUE;
1720 CHECK_MALLOC_TOO_LATE_FOR('T');
1722 PL_taint_warn = FALSE;
1730 #ifdef MACOS_TRADITIONAL
1731 /* ignore -e for Dev:Pseudo argument */
1732 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1735 forbid_setid('e', -1);
1737 PL_e_script = newSVpvs("");
1738 filter_add(read_e_script, NULL);
1741 sv_catpv(PL_e_script, s);
1743 sv_catpv(PL_e_script, argv[1]);
1747 Perl_croak(aTHX_ "No code specified for -%c", *s);
1748 sv_catpvs(PL_e_script, "\n");
1752 #ifdef USE_SITECUSTOMIZE
1758 case 'I': /* -I handled both here and in moreswitches() */
1759 forbid_setid('I', -1);
1760 if (!*++s && (s=argv[1]) != NULL) {
1764 STRLEN len = strlen(s);
1765 const char * const p = savepvn(s, len);
1766 incpush(p, TRUE, TRUE, FALSE, FALSE);
1767 sv_catpvs(sv, "-I");
1768 sv_catpvn(sv, p, len);
1773 Perl_croak(aTHX_ "No directory specified for -I");
1776 forbid_setid('P', -1);
1777 PL_preprocess = TRUE;
1781 forbid_setid('S', -1);
1790 PL_preambleav = newAV();
1791 av_push(PL_preambleav,
1792 newSVpvs("use Config;"));
1796 opts_prog = newSVpvs("print Config::myconfig(),");
1798 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1800 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1802 opts = SvCUR(opts_prog);
1804 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1808 # ifdef DEBUG_LEAKING_SCALARS
1809 " DEBUG_LEAKING_SCALARS"
1811 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1812 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1814 # ifdef FAKE_THREADS
1817 # ifdef MULTIPLICITY
1826 # ifdef PERL_DONT_CREATE_GVSV
1827 " PERL_DONT_CREATE_GVSV"
1829 # ifdef PERL_GLOBAL_STRUCT
1830 " PERL_GLOBAL_STRUCT"
1832 # ifdef PERL_IMPLICIT_CONTEXT
1833 " PERL_IMPLICIT_CONTEXT"
1835 # ifdef PERL_IMPLICIT_SYS
1836 " PERL_IMPLICIT_SYS"
1841 # ifdef PERL_MALLOC_WRAP
1844 # ifdef PERL_NEED_APPCTX
1847 # ifdef PERL_NEED_TIMESBASE
1848 " PERL_NEED_TIMESBASE"
1850 # ifdef PERL_OLD_COPY_ON_WRITE
1851 " PERL_OLD_COPY_ON_WRITE"
1853 # ifdef PERL_TRACK_MEMPOOL
1854 " PERL_TRACK_MEMPOOL"
1856 # ifdef PERL_USE_SAFE_PUTENV
1857 " PERL_USE_SAFE_PUTENV"
1859 #ifdef PERL_USES_PL_PIDSTATUS
1860 " PERL_USES_PL_PIDSTATUS"
1862 # ifdef PL_OP_SLAB_ALLOC
1865 # ifdef THREADS_HAVE_PIDS
1866 " THREADS_HAVE_PIDS"
1868 # ifdef USE_64_BIT_ALL
1871 # ifdef USE_64_BIT_INT
1874 # ifdef USE_ITHREADS
1877 # ifdef USE_LARGE_FILES
1880 # ifdef USE_LONG_DOUBLE
1886 # ifdef USE_REENTRANT_API
1887 " USE_REENTRANT_API"
1892 # ifdef USE_SITECUSTOMIZE
1893 " USE_SITECUSTOMIZE"
1900 while (SvCUR(opts_prog) > opts+76) {
1901 /* find last space after "options: " and before col 76
1905 char * const pv = SvPV_nolen(opts_prog);
1906 const char c = pv[opts+76];
1908 space = strrchr(pv+opts+26, ' ');
1910 if (!space) break; /* "Can't happen" */
1912 /* break the line before that space */
1915 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1916 STR_WITH_LEN("\\n "));
1919 sv_catpvs(opts_prog,"\\n\",");
1921 #if defined(LOCAL_PATCH_COUNT)
1922 if (LOCAL_PATCH_COUNT > 0) {
1924 sv_catpvs(opts_prog,
1925 "\" Locally applied patches:\\n\",");
1926 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1927 if (PL_localpatches[i])
1928 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1929 0, PL_localpatches[i], 0);
1933 Perl_sv_catpvf(aTHX_ opts_prog,
1934 "\" Built under %s\\n\"",OSNAME);
1937 Perl_sv_catpvf(aTHX_ opts_prog,
1938 ",\" Compiled at %s %s\\n\"",__DATE__,
1941 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1945 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1946 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1947 "sort grep {/^PERL/} keys %ENV; ");
1949 sv_catpvs(opts_prog,
1950 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1952 sv_catpvs(opts_prog,
1953 "print \" \\%ENV:\\n @env\\n\" if @env;"
1954 "print \" \\@INC:\\n @INC\\n\";");
1958 opts_prog = Perl_newSVpvf(aTHX_
1959 "Config::config_vars(qw%c%s%c)",
1963 av_push(PL_preambleav, opts_prog);
1964 /* don't look for script or read stdin */
1965 scriptname = BIT_BUCKET;
1969 PL_doextract = TRUE;
1977 if (!*++s || isSPACE(*s)) {
1981 /* catch use of gnu style long options */
1982 if (strEQ(s, "version")) {
1986 if (strEQ(s, "help")) {
1993 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1999 #ifndef SECURE_INTERNAL_GETENV
2002 (s = PerlEnv_getenv("PERL5OPT")))
2004 const char *popt = s;
2007 if (*s == '-' && *(s+1) == 'T') {
2008 CHECK_MALLOC_TOO_LATE_FOR('T');
2010 PL_taint_warn = FALSE;
2013 char *popt_copy = NULL;
2026 if (!strchr("CDIMUdmtwA", *s))
2027 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2031 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2032 s = popt_copy + (s - popt);
2033 d = popt_copy + (d - popt);
2040 if( !PL_tainting ) {
2041 PL_taint_warn = TRUE;
2051 #ifdef USE_SITECUSTOMIZE
2054 PL_preambleav = newAV();
2055 av_unshift(PL_preambleav, 1);
2056 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2060 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2061 PL_compiling.cop_warnings
2062 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
2066 scriptname = argv[0];
2069 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2071 else if (scriptname == NULL) {
2073 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2079 /* Set $^X early so that it can be used for relocatable paths in @INC */
2080 assert (!PL_tainted);
2082 S_set_caret_X(aTHX);
2089 = open_script(scriptname, dosearch, sv, &suidscript);
2091 validate_suid(validarg, scriptname, fdscript, suidscript);
2094 # if defined(SIGCHLD) || defined(SIGCLD)
2097 # define SIGCHLD SIGCLD
2099 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2100 if (sigstate == (Sighandler_t) SIG_IGN) {
2101 if (ckWARN(WARN_SIGNAL))
2102 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2103 "Can't ignore signal CHLD, forcing to default");
2104 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2111 #ifdef MACOS_TRADITIONAL
2112 || gMacPerl_AlwaysExtract
2116 /* This will croak if suidscript is >= 0, as -x cannot be used with
2118 forbid_setid('x', suidscript);
2119 /* Hence you can't get here if suidscript >= 0 */
2122 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2123 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2127 PL_main_cv = PL_compcv = (CV*)newSV(0);
2128 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2129 CvUNIQUE_on(PL_compcv);
2131 CvPADLIST(PL_compcv) = pad_new(0);
2134 boot_core_UNIVERSAL();
2135 boot_core_xsutils();
2138 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2140 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2146 # ifdef HAS_SOCKS5_INIT
2147 socks5_init(argv[0]);
2153 init_predump_symbols();
2154 /* init_postdump_symbols not currently designed to be called */
2155 /* more than once (ENV isn't cleared first, for example) */
2156 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2158 init_postdump_symbols(argc,argv,env);
2160 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2161 * or explicitly in some platforms.
2162 * locale.c:Perl_init_i18nl10n() if the environment
2163 * look like the user wants to use UTF-8. */
2164 #if defined(__SYMBIAN32__)
2165 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2168 /* Requires init_predump_symbols(). */
2169 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2174 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2175 * and the default open disciplines. */
2176 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2177 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2179 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2180 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2181 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2183 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2184 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2185 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2187 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2188 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2189 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2191 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2192 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2195 sv_setpvn(sv, ":utf8\0:utf8", 11);
2197 sv_setpvn(sv, ":utf8\0", 6);
2200 sv_setpvn(sv, "\0:utf8", 6);
2206 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2207 if (strEQ(s, "unsafe"))
2208 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2209 else if (strEQ(s, "safe"))
2210 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2212 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2216 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2220 PL_xmlfp = PerlIO_stdout();
2222 PL_xmlfp = PerlIO_open(s, "w");
2224 Perl_croak(aTHX_ "Can't open %s", s);
2226 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2228 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2229 PL_madskills = atoi(s);
2230 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2236 /* now parse the script */
2238 SETERRNO(0,SS_NORMAL);
2240 #ifdef MACOS_TRADITIONAL
2241 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2243 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2245 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2246 MacPerl_MPWFileName(PL_origfilename));
2250 if (yyparse() || PL_error_count) {
2252 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2254 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2259 CopLINE_set(PL_curcop, 0);
2260 PL_curstash = PL_defstash;
2261 PL_preprocess = FALSE;
2263 SvREFCNT_dec(PL_e_script);
2271 SAVECOPFILE(PL_curcop);
2272 SAVECOPLINE(PL_curcop);
2273 gv_check(PL_defstash);
2280 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2281 dump_mstats("after compilation:");
2290 =for apidoc perl_run
2292 Tells a Perl interpreter to run. See L<perlembed>.
2305 PERL_UNUSED_ARG(my_perl);
2307 oldscope = PL_scopestack_ix;
2315 cxstack_ix = -1; /* start context stack again */
2317 case 0: /* normal completion */
2321 case 2: /* my_exit() */
2322 while (PL_scopestack_ix > oldscope)
2325 PL_curstash = PL_defstash;
2326 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2327 PL_endav && !PL_minus_c)
2328 call_list(oldscope, PL_endav);
2330 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2331 dump_mstats("after execution: ");
2337 POPSTACK_TO(PL_mainstack);
2340 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2352 S_run_body(pTHX_ I32 oldscope)
2355 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2356 PL_sawampersand ? "Enabling" : "Omitting"));
2358 if (!PL_restartop) {
2362 exit(0); /* less likely to core dump than my_exit(0) */
2365 DEBUG_x(dump_all());
2368 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2370 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2374 #ifdef MACOS_TRADITIONAL
2375 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2376 (gMacPerl_ErrorFormat ? "# " : ""),
2377 MacPerl_MPWFileName(PL_origfilename));
2379 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2383 if (PERLDB_SINGLE && PL_DBsingle)
2384 sv_setiv(PL_DBsingle, 1);
2386 call_list(oldscope, PL_initav);
2392 PL_op = PL_restartop;
2396 else if (PL_main_start) {
2397 CvDEPTH(PL_main_cv) = 1;
2398 PL_op = PL_main_start;
2406 =head1 SV Manipulation Functions
2408 =for apidoc p||get_sv
2410 Returns the SV of the specified Perl scalar. If C<create> is set and the
2411 Perl variable does not exist then it will be created. If C<create> is not
2412 set and the variable does not exist then NULL is returned.
2418 Perl_get_sv(pTHX_ const char *name, I32 create)
2421 gv = gv_fetchpv(name, create, SVt_PV);
2428 =head1 Array Manipulation Functions
2430 =for apidoc p||get_av
2432 Returns the AV of the specified Perl array. If C<create> is set and the
2433 Perl variable does not exist then it will be created. If C<create> is not
2434 set and the variable does not exist then NULL is returned.
2440 Perl_get_av(pTHX_ const char *name, I32 create)
2442 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2451 =head1 Hash Manipulation Functions
2453 =for apidoc p||get_hv
2455 Returns the HV of the specified Perl hash. If C<create> is set and the
2456 Perl variable does not exist then it will be created. If C<create> is not
2457 set and the variable does not exist then NULL is returned.
2463 Perl_get_hv(pTHX_ const char *name, I32 create)
2465 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2474 =head1 CV Manipulation Functions
2476 =for apidoc p||get_cv
2478 Returns the CV of the specified Perl subroutine. If C<create> is set and
2479 the Perl subroutine does not exist then it will be declared (which has the
2480 same effect as saying C<sub name;>). If C<create> is not set and the
2481 subroutine does not exist then NULL is returned.
2487 Perl_get_cv(pTHX_ const char *name, I32 create)
2489 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2490 /* XXX unsafe for threads if eval_owner isn't held */
2491 /* XXX this is probably not what they think they're getting.
2492 * It has the same effect as "sub name;", i.e. just a forward
2494 if (create && !GvCVu(gv))
2495 return newSUB(start_subparse(FALSE, 0),
2496 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2503 /* Be sure to refetch the stack pointer after calling these routines. */
2507 =head1 Callback Functions
2509 =for apidoc p||call_argv
2511 Performs a callback to the specified Perl sub. See L<perlcall>.
2517 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2519 /* See G_* flags in cop.h */
2520 /* null terminated arg list */
2528 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2533 return call_pv(sub_name, flags);
2537 =for apidoc p||call_pv
2539 Performs a callback to the specified Perl sub. See L<perlcall>.
2545 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2546 /* name of the subroutine */
2547 /* See G_* flags in cop.h */
2549 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2553 =for apidoc p||call_method
2555 Performs a callback to the specified Perl method. The blessed object must
2556 be on the stack. See L<perlcall>.
2562 Perl_call_method(pTHX_ const char *methname, I32 flags)
2563 /* name of the subroutine */
2564 /* See G_* flags in cop.h */
2566 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2569 /* May be called with any of a CV, a GV, or an SV containing the name. */
2571 =for apidoc p||call_sv
2573 Performs a callback to the Perl sub whose name is in the SV. See
2580 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2581 /* See G_* flags in cop.h */
2584 LOGOP myop; /* fake syntax tree node */
2587 volatile I32 retval = 0;
2589 bool oldcatch = CATCH_GET;
2591 OP* const oldop = PL_op;
2594 if (flags & G_DISCARD) {
2599 Zero(&myop, 1, LOGOP);
2600 myop.op_next = NULL;
2601 if (!(flags & G_NOARGS))
2602 myop.op_flags |= OPf_STACKED;
2603 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2604 (flags & G_ARRAY) ? OPf_WANT_LIST :
2609 EXTEND(PL_stack_sp, 1);
2610 *++PL_stack_sp = sv;
2612 oldscope = PL_scopestack_ix;
2614 if (PERLDB_SUB && PL_curstash != PL_debstash
2615 /* Handle first BEGIN of -d. */
2616 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2617 /* Try harder, since this may have been a sighandler, thus
2618 * curstash may be meaningless. */
2619 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2620 && !(flags & G_NODEBUG))
2621 PL_op->op_private |= OPpENTERSUB_DB;
2623 if (flags & G_METHOD) {
2624 Zero(&method_op, 1, UNOP);
2625 method_op.op_next = PL_op;
2626 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2627 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2628 PL_op = (OP*)&method_op;
2631 if (!(flags & G_EVAL)) {
2633 CALL_BODY_SUB((OP*)&myop);
2634 retval = PL_stack_sp - (PL_stack_base + oldmark);
2635 CATCH_SET(oldcatch);
2638 myop.op_other = (OP*)&myop;
2640 create_eval_scope(flags|G_FAKINGEVAL);
2648 CALL_BODY_SUB((OP*)&myop);
2649 retval = PL_stack_sp - (PL_stack_base + oldmark);
2650 if (!(flags & G_KEEPERR))
2651 sv_setpvn(ERRSV,"",0);
2657 /* my_exit() was called */
2658 PL_curstash = PL_defstash;
2661 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2662 Perl_croak(aTHX_ "Callback called exit");
2667 PL_op = PL_restartop;
2671 PL_stack_sp = PL_stack_base + oldmark;
2672 if (flags & G_ARRAY)
2676 *++PL_stack_sp = &PL_sv_undef;
2681 if (PL_scopestack_ix > oldscope)
2682 delete_eval_scope();
2686 if (flags & G_DISCARD) {
2687 PL_stack_sp = PL_stack_base + oldmark;
2696 /* Eval a string. The G_EVAL flag is always assumed. */
2699 =for apidoc p||eval_sv
2701 Tells Perl to C<eval> the string in the SV.
2707 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2709 /* See G_* flags in cop.h */
2713 UNOP myop; /* fake syntax tree node */
2714 volatile I32 oldmark = SP - PL_stack_base;
2715 volatile I32 retval = 0;
2717 OP* const oldop = PL_op;
2720 if (flags & G_DISCARD) {
2727 Zero(PL_op, 1, UNOP);
2728 EXTEND(PL_stack_sp, 1);
2729 *++PL_stack_sp = sv;
2731 if (!(flags & G_NOARGS))
2732 myop.op_flags = OPf_STACKED;
2733 myop.op_next = NULL;
2734 myop.op_type = OP_ENTEREVAL;
2735 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2736 (flags & G_ARRAY) ? OPf_WANT_LIST :
2738 if (flags & G_KEEPERR)
2739 myop.op_flags |= OPf_SPECIAL;
2741 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2742 * before a PUSHEVAL, which corrupts the stack after a croak */
2743 TAINT_PROPER("eval_sv()");
2749 CALL_BODY_EVAL((OP*)&myop);
2750 retval = PL_stack_sp - (PL_stack_base + oldmark);
2751 if (!(flags & G_KEEPERR))
2752 sv_setpvn(ERRSV,"",0);
2758 /* my_exit() was called */
2759 PL_curstash = PL_defstash;
2762 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2763 Perl_croak(aTHX_ "Callback called exit");
2768 PL_op = PL_restartop;
2772 PL_stack_sp = PL_stack_base + oldmark;
2773 if (flags & G_ARRAY)
2777 *++PL_stack_sp = &PL_sv_undef;
2783 if (flags & G_DISCARD) {
2784 PL_stack_sp = PL_stack_base + oldmark;
2794 =for apidoc p||eval_pv
2796 Tells Perl to C<eval> the given string and return an SV* result.
2802 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2806 SV* sv = newSVpv(p, 0);
2808 eval_sv(sv, G_SCALAR);
2815 if (croak_on_error && SvTRUE(ERRSV)) {
2816 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2822 /* Require a module. */
2825 =head1 Embedding Functions
2827 =for apidoc p||require_pv
2829 Tells Perl to C<require> the file named by the string argument. It is
2830 analogous to the Perl code C<eval "require '$file'">. It's even
2831 implemented that way; consider using load_module instead.
2836 Perl_require_pv(pTHX_ const char *pv)
2841 PUSHSTACKi(PERLSI_REQUIRE);
2843 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2844 eval_sv(sv_2mortal(sv), G_DISCARD);
2850 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2852 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2855 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2859 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2861 /* This message really ought to be max 23 lines.
2862 * Removed -h because the user already knows that option. Others? */
2864 static const char * const usage_msg[] = {
2865 "-0[octal] specify record separator (\\0, if no argument)",
2866 "-A[mod][=pattern] activate all/given assertions",
2867 "-a autosplit mode with -n or -p (splits $_ into @F)",
2868 "-C[number/list] enables the listed Unicode features",
2869 "-c check syntax only (runs BEGIN and CHECK blocks)",
2870 "-d[:debugger] run program under debugger",
2871 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2872 "-e program one line of program (several -e's allowed, omit programfile)",
2873 "-E program like -e, but enables all optional features",
2874 "-f don't do $sitelib/sitecustomize.pl at startup",
2875 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2876 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2877 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2878 "-l[octal] enable line ending processing, specifies line terminator",
2879 "-[mM][-]module execute \"use/no module...\" before executing program",
2880 "-n assume \"while (<>) { ... }\" loop around program",
2881 "-p assume loop like -n but print line also, like sed",
2882 "-P run program through C preprocessor before compilation",
2883 "-s enable rudimentary parsing for switches after programfile",
2884 "-S look for programfile using PATH environment variable",
2885 "-t enable tainting warnings",
2886 "-T enable tainting checks",
2887 "-u dump core after parsing program",
2888 "-U allow unsafe operations",
2889 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2890 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2891 "-w enable many useful warnings (RECOMMENDED)",
2892 "-W enable all warnings",
2893 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2894 "-X disable all warnings",
2898 const char * const *p = usage_msg;
2900 PerlIO_printf(PerlIO_stdout(),
2901 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2904 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2907 /* convert a string of -D options (or digits) into an int.
2908 * sets *s to point to the char after the options */
2912 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2914 static const char * const usage_msgd[] = {
2915 " Debugging flag values: (see also -d)",
2916 " p Tokenizing and parsing (with v, displays parse stack)",
2917 " s Stack snapshots (with v, displays all stacks)",
2918 " l Context (loop) stack processing",
2919 " t Trace execution",
2920 " o Method and overloading resolution",
2921 " c String/numeric conversions",
2922 " P Print profiling info, preprocessor command for -P, source file input state",
2923 " m Memory allocation",
2924 " f Format processing",
2925 " r Regular expression parsing and execution",
2926 " x Syntax tree dump",
2927 " u Tainting checks",
2928 " H Hash dump -- usurps values()",
2929 " X Scratchpad allocation",
2931 " S Thread synchronization",
2933 " R Include reference counts of dumped variables (eg when using -Ds)",
2934 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2935 " v Verbose: use in conjunction with other flags",
2937 " A Consistency checks on internal structures",
2938 " q quiet - currently only suppresses the 'EXECUTING' message",
2943 /* if adding extra options, remember to update DEBUG_MASK */
2944 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2946 for (; isALNUM(**s); (*s)++) {
2947 const char * const d = strchr(debopts,**s);
2949 i |= 1 << (d - debopts);
2950 else if (ckWARN_d(WARN_DEBUGGING))
2951 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2952 "invalid option -D%c, use -D'' to see choices\n", **s);
2955 else if (isDIGIT(**s)) {
2957 for (; isALNUM(**s); (*s)++) ;
2959 else if (givehelp) {
2960 const char *const *p = usage_msgd;
2961 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2964 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2965 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2966 "-Dp not implemented on this platform\n");
2972 /* This routine handles any switches that can be given during run */
2975 Perl_moreswitches(pTHX_ char *s)
2986 SvREFCNT_dec(PL_rs);
2987 if (s[1] == 'x' && s[2]) {
2988 const char *e = s+=2;
2994 flags = PERL_SCAN_SILENT_ILLDIGIT;
2995 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2996 if (s + numlen < e) {
2997 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3001 PL_rs = newSVpvs("");
3002 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3003 tmps = (U8*)SvPVX(PL_rs);
3004 uvchr_to_utf8(tmps, rschar);
3005 SvCUR_set(PL_rs, UNISKIP(rschar));
3010 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3011 if (rschar & ~((U8)~0))
3012 PL_rs = &PL_sv_undef;
3013 else if (!rschar && numlen >= 2)
3014 PL_rs = newSVpvs("");
3016 char ch = (char)rschar;
3017 PL_rs = newSVpvn(&ch, 1);
3020 sv_setsv(get_sv("/", TRUE), PL_rs);
3025 PL_unicode = parse_unicode_opts( (const char **)&s );
3026 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3032 while (*s && !isSPACE(*s)) ++s;
3033 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3044 forbid_setid('d', -1);
3047 /* -dt indicates to the debugger that threads will be used */
3048 if (*s == 't' && !isALNUM(s[1])) {
3050 my_setenv("PERL5DB_THREADED", "1");
3053 /* The following permits -d:Mod to accepts arguments following an =
3054 in the fashion that -MSome::Mod does. */
3055 if (*s == ':' || *s == '=') {
3057 SV * const sv = newSVpvs("use Devel::");
3059 /* We now allow -d:Module=Foo,Bar */
3060 while(isALNUM(*s) || *s==':') ++s;
3062 sv_catpv(sv, start);
3064 sv_catpvn(sv, start, s-start);
3065 /* Don't use NUL as q// delimiter here, this string goes in the
3067 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3070 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3073 PL_perldb = PERLDB_ALL;
3080 forbid_setid('D', -1);
3082 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3083 #else /* !DEBUGGING */
3084 if (ckWARN_d(WARN_DEBUGGING))
3085 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3086 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3087 for (s++; isALNUM(*s); s++) ;
3092 usage(PL_origargv[0]);
3095 Safefree(PL_inplace);
3096 #if defined(__CYGWIN__) /* do backup extension automagically */
3097 if (*(s+1) == '\0') {
3098 PL_inplace = savepvs(".bak");
3101 #endif /* __CYGWIN__ */
3103 const char * const start = ++s;
3104 while (*s && !isSPACE(*s))
3107 PL_inplace = savepvn(start, s - start);
3111 if (*s == '-') /* Additional switches on #! line. */
3115 case 'I': /* -I handled both here and in parse_body() */
3116 forbid_setid('I', -1);
3118 while (*s && isSPACE(*s))
3123 /* ignore trailing spaces (possibly followed by other switches) */
3125 for (e = p; *e && !isSPACE(*e); e++) ;
3129 } while (*p && *p != '-');
3130 e = savepvn(s, e-s);
3131 incpush(e, TRUE, TRUE, FALSE, FALSE);
3138 Perl_croak(aTHX_ "No directory specified for -I");
3144 SvREFCNT_dec(PL_ors_sv);
3150 PL_ors_sv = newSVpvs("\n");
3151 numlen = 3 + (*s == '0');
3152 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3156 if (RsPARA(PL_rs)) {
3157 PL_ors_sv = newSVpvs("\n\n");
3160 PL_ors_sv = newSVsv(PL_rs);
3165 forbid_setid('A', -1);
3167 PL_preambleav = newAV();
3170 char * const start = s;
3171 SV * const sv = newSVpvs("use assertions::activate");
3172 while(isALNUM(*s) || *s == ':') ++s;
3174 sv_catpvs(sv, "::");
3175 sv_catpvn(sv, start, s-start);
3178 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3181 else if (*s != '\0') {
3182 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3184 av_push(PL_preambleav, sv);
3188 forbid_setid('M', -1); /* XXX ? */
3191 forbid_setid('m', -1); /* XXX ? */
3195 const char *use = "use ";
3196 /* -M-foo == 'no foo' */
3197 /* Leading space on " no " is deliberate, to make both
3198 possibilities the same length. */
3199 if (*s == '-') { use = " no "; ++s; }
3200 sv = newSVpvn(use,4);
3202 /* We allow -M'Module qw(Foo Bar)' */
3203 while(isALNUM(*s) || *s==':') ++s;
3205 sv_catpv(sv, start);
3206 if (*(start-1) == 'm') {
3208 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3209 sv_catpvs( sv, " ()");
3213 Perl_croak(aTHX_ "Module name required with -%c option",
3215 sv_catpvn(sv, start, s-start);
3216 sv_catpvs(sv, " split(/,/,q");
3217 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3219 sv_catpvs(sv, "\0)");
3223 PL_preambleav = newAV();
3224 av_push(PL_preambleav, sv);
3227 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3238 forbid_setid('s', -1);
3239 PL_doswitches = TRUE;
3253 #ifdef MACOS_TRADITIONAL
3254 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3256 PL_do_undump = TRUE;
3264 if (!sv_derived_from(PL_patchlevel, "version"))
3265 upg_version(PL_patchlevel);
3267 PerlIO_printf(PerlIO_stdout(),
3268 Perl_form(aTHX_ "\nThis is perl, %"SVf
3269 #ifdef PERL_PATCHNUM
3270 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3273 (void*)vstringify(PL_patchlevel),
3276 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3277 PerlIO_printf(PerlIO_stdout(),
3278 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3279 vstringify(PL_patchlevel)));
3280 PerlIO_printf(PerlIO_stdout(),
3281 Perl_form(aTHX_ " built under %s at %s %s\n",
3282 OSNAME, __DATE__, __TIME__));
3283 PerlIO_printf(PerlIO_stdout(),
3284 Perl_form(aTHX_ " OS Specific Release: %s\n",
3288 #if defined(LOCAL_PATCH_COUNT)
3289 if (LOCAL_PATCH_COUNT > 0)
3290 PerlIO_printf(PerlIO_stdout(),
3291 "\n(with %d registered patch%s, "
3292 "see perl -V for more detail)",
3294 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "\n\nCopyright 1987-2006, Larry Wall\n");
3299 #ifdef MACOS_TRADITIONAL
3300 PerlIO_printf(PerlIO_stdout(),
3301 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3302 "maintained by Chris Nandor\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3311 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3316 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "atariST series port, ++jrb bammi@cadence.com\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3335 PerlIO_printf(PerlIO_stdout(),
3336 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3343 PerlIO_printf(PerlIO_stdout(),
3344 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "MiNT port by Guido Flohr, 1997-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "EPOC port by Olaf Flebbe, 1999-2002\n");
3355 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3356 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3359 #ifdef __SYMBIAN32__
3360 PerlIO_printf(PerlIO_stdout(),
3361 "Symbian port by Nokia, 2004-2005\n");
3363 #ifdef BINARY_BUILD_NOTICE
3364 BINARY_BUILD_NOTICE;
3366 PerlIO_printf(PerlIO_stdout(),
3368 Perl may be copied only under the terms of either the Artistic License or the\n\
3369 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3370 Complete documentation for Perl, including FAQ lists, should be found on\n\
3371 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3372 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3375 if (! (PL_dowarn & G_WARN_ALL_MASK))
3376 PL_dowarn |= G_WARN_ON;
3380 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3381 if (!specialWARN(PL_compiling.cop_warnings))
3382 PerlMemShared_free(PL_compiling.cop_warnings);
3383 PL_compiling.cop_warnings = pWARN_ALL ;
3387 PL_dowarn = G_WARN_ALL_OFF;
3388 if (!specialWARN(PL_compiling.cop_warnings))
3389 PerlMemShared_free(PL_compiling.cop_warnings);
3390 PL_compiling.cop_warnings = pWARN_NONE ;
3395 if (s[1] == '-') /* Additional switches on #! line. */
3400 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3406 #ifdef ALTERNATE_SHEBANG
3407 case 'S': /* OS/2 needs -S on "extproc" line. */
3415 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3420 /* compliments of Tom Christiansen */
3422 /* unexec() can be found in the Gnu emacs distribution */
3423 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3426 Perl_my_unexec(pTHX)
3428 PERL_UNUSED_CONTEXT;
3430 SV * prog = newSVpv(BIN_EXP, 0);
3431 SV * file = newSVpv(PL_origfilename, 0);
3435 sv_catpvs(prog, "/perl");
3436 sv_catpvs(file, ".perldump");
3438 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3439 /* unexec prints msg to stderr in case of failure */
3440 PerlProc_exit(status);
3443 # include <lib$routines.h>
3444 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3445 # elif defined(WIN32) || defined(__CYGWIN__)
3446 Perl_croak(aTHX_ "dump is not supported");
3448 ABORT(); /* for use with undump */
3453 /* initialize curinterp */
3459 # define PERLVAR(var,type)
3460 # define PERLVARA(var,n,type)
3461 # if defined(PERL_IMPLICIT_CONTEXT)
3462 # define PERLVARI(var,type,init) aTHX->var = init;
3463 # define PERLVARIC(var,type,init) aTHX->var = init;
3465 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3466 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3468 # include "intrpvar.h"
3469 # include "thrdvar.h"
3475 # define PERLVAR(var,type)
3476 # define PERLVARA(var,n,type)
3477 # define PERLVARI(var,type,init) PL_##var = init;
3478 # define PERLVARIC(var,type,init) PL_##var = init;
3479 # include "intrpvar.h"
3480 # include "thrdvar.h"
3487 /* As these are inside a structure, PERLVARI isn't capable of initialising
3489 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3490 PL_reg_poscache = PL_reg_starttry = NULL;
3494 S_init_main_stash(pTHX)
3499 PL_curstash = PL_defstash = newHV();
3500 /* We know that the string "main" will be in the global shared string
3501 table, so it's a small saving to use it rather than allocate another
3503 PL_curstname = newSVpvs_share("main");
3504 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3505 /* If we hadn't caused another reference to "main" to be in the shared
3506 string table above, then it would be worth reordering these two,
3507 because otherwise all we do is delete "main" from it as a consequence
3508 of the SvREFCNT_dec, only to add it again with hv_name_set */
3509 SvREFCNT_dec(GvHV(gv));
3510 hv_name_set(PL_defstash, "main", 4, 0);
3511 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3513 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3515 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3516 GvMULTI_on(PL_incgv);
3517 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3518 GvMULTI_on(PL_hintgv);
3519 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3520 SvREFCNT_inc_simple(PL_defgv);
3521 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3522 SvREFCNT_inc_simple(PL_errgv);
3523 GvMULTI_on(PL_errgv);
3524 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3525 GvMULTI_on(PL_replgv);
3526 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3527 #ifdef PERL_DONT_CREATE_GVSV
3530 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3531 sv_setpvn(ERRSV, "", 0);
3532 PL_curstash = PL_defstash;
3533 CopSTASH_set(&PL_compiling, PL_defstash);
3534 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3535 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3537 /* We must init $/ before switches are processed. */
3538 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3542 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3548 const char *cpp_discard_flag;
3557 PL_origfilename = savepvs("-e");
3560 /* if find_script() returns, it returns a malloc()-ed value */
3561 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3563 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3564 const char *s = scriptname + 8;
3570 * Tell apart "normal" usage of fdscript, e.g.
3571 * with bash on FreeBSD:
3572 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3573 * from usage in suidperl.
3574 * Does any "normal" usage leave garbage after the number???
3575 * Is it a mistake to use a similar /dev/fd/ construct for
3580 * Be supersafe and do some sanity-checks.
3581 * Still, can we be sure we got the right thing?
3584 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3587 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3589 scriptname = savepv(s + 1);
3590 Safefree(PL_origfilename);
3591 PL_origfilename = (char *)scriptname;
3596 CopFILE_free(PL_curcop);
3597 CopFILE_set(PL_curcop, PL_origfilename);
3598 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3599 scriptname = (char *)"";
3600 if (fdscript >= 0) {
3601 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3602 # if defined(HAS_FCNTL) && defined(F_SETFD)
3604 /* ensure close-on-exec */
3605 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3610 Perl_croak(aTHX_ "sperl needs fd script\n"
3611 "You should not call sperl directly; do you need to "
3612 "change a #! line\nfrom sperl to perl?\n");
3615 * Do not open (or do other fancy stuff) while setuid.
3616 * Perl does the open, and hands script to suidperl on a fd;
3617 * suidperl only does some checks, sets up UIDs and re-execs
3618 * perl with that fd as it has always done.
3621 if (*suidscript != 1) {
3622 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3625 else if (PL_preprocess) {
3626 const char * const cpp_cfg = CPPSTDIN;
3627 SV * const cpp = newSVpvs("");
3628 SV * const cmd = newSV(0);
3630 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3631 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3632 if (strEQ(cpp_cfg, "cppstdin"))
3633 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3634 sv_catpv(cpp, cpp_cfg);
3637 sv_catpvs(sv, "-I");
3638 sv_catpv(sv,PRIVLIB_EXP);
3641 DEBUG_P(PerlIO_printf(Perl_debug_log,
3642 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3643 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3646 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3653 cpp_discard_flag = "";
3655 cpp_discard_flag = "-C";
3659 perl = os2_execname(aTHX);
3661 perl = PL_origargv[0];
3665 /* This strips off Perl comments which might interfere with
3666 the C pre-processor, including #!. #line directives are
3667 deliberately stripped to avoid confusion with Perl's version
3668 of #line. FWP played some golf with it so it will fit
3669 into VMS's 255 character buffer.
3672 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3674 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3676 Perl_sv_setpvf(aTHX_ cmd, "\
3677 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3678 perl, quote, code, quote, scriptname, (void*)cpp,
3679 cpp_discard_flag, (void*)sv, CPPMINUS);
3681 PL_doextract = FALSE;
3683 DEBUG_P(PerlIO_printf(Perl_debug_log,
3684 "PL_preprocess: cmd=\"%s\"\n",
3687 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3691 else if (!*scriptname) {
3692 forbid_setid(0, *suidscript);
3693 PL_rsfp = PerlIO_stdin();
3696 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3697 # if defined(HAS_FCNTL) && defined(F_SETFD)
3699 /* ensure close-on-exec */
3700 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3703 #endif /* IAMSUID */
3705 /* PSz 16 Sep 03 Keep neat error message */
3707 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3709 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3710 CopFILE(PL_curcop), Strerror(errno));
3716 * I_SYSSTATVFS HAS_FSTATVFS
3718 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3719 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3720 * here so that metaconfig picks them up. */
3724 S_fd_on_nosuid_fs(pTHX_ int fd)
3727 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3728 * but is needed also on machines without setreuid.
3729 * Seems safe enough to run as root.
3731 int check_okay = 0; /* able to do all the required sys/libcalls */
3732 int on_nosuid = 0; /* the fd is on a nosuid fs */
3734 * Need to check noexec also: nosuid might not be set, the average
3735 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3737 int on_noexec = 0; /* the fd is on a noexec fs */
3740 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3741 * fstatvfs() is UNIX98.
3742 * fstatfs() is 4.3 BSD.
3743 * ustat()+getmnt() is pre-4.3 BSD.
3744 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3745 * an irrelevant filesystem while trying to reach the right one.
3748 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3750 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3751 defined(HAS_FSTATVFS)
3752 # define FD_ON_NOSUID_CHECK_OKAY
3753 struct statvfs stfs;
3755 check_okay = fstatvfs(fd, &stfs) == 0;
3756 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3758 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3759 on platforms where it is present. */
3760 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3762 # endif /* fstatvfs */
3764 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3765 defined(PERL_MOUNT_NOSUID) && \
3766 defined(PERL_MOUNT_NOEXEC) && \
3767 defined(HAS_FSTATFS) && \
3768 defined(HAS_STRUCT_STATFS) && \
3769 defined(HAS_STRUCT_STATFS_F_FLAGS)
3770 # define FD_ON_NOSUID_CHECK_OKAY
3773 check_okay = fstatfs(fd, &stfs) == 0;
3774 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3775 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3776 # endif /* fstatfs */
3778 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3779 defined(PERL_MOUNT_NOSUID) && \
3780 defined(PERL_MOUNT_NOEXEC) && \
3781 defined(HAS_FSTAT) && \
3782 defined(HAS_USTAT) && \
3783 defined(HAS_GETMNT) && \
3784 defined(HAS_STRUCT_FS_DATA) && \
3786 # define FD_ON_NOSUID_CHECK_OKAY
3789 if (fstat(fd, &fdst) == 0) {
3791 if (ustat(fdst.st_dev, &us) == 0) {
3793 /* NOSTAT_ONE here because we're not examining fields which
3794 * vary between that case and STAT_ONE. */
3795 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3796 size_t cmplen = sizeof(us.f_fname);
3797 if (sizeof(fsd.fd_req.path) < cmplen)
3798 cmplen = sizeof(fsd.fd_req.path);
3799 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3800 fdst.st_dev == fsd.fd_req.dev) {
3802 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3803 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3808 # endif /* fstat+ustat+getmnt */
3810 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3811 defined(HAS_GETMNTENT) && \
3812 defined(HAS_HASMNTOPT) && \
3813 defined(MNTOPT_NOSUID) && \
3814 defined(MNTOPT_NOEXEC)
3815 # define FD_ON_NOSUID_CHECK_OKAY
3816 FILE *mtab = fopen("/etc/mtab", "r");
3817 struct mntent *entry;
3820 if (mtab && (fstat(fd, &stb) == 0)) {
3821 while (entry = getmntent(mtab)) {
3822 if (stat(entry->mnt_dir, &fsb) == 0
3823 && fsb.st_dev == stb.st_dev)
3825 /* found the filesystem */
3827 if (hasmntopt(entry, MNTOPT_NOSUID))
3829 if (hasmntopt(entry, MNTOPT_NOEXEC))
3832 } /* A single fs may well fail its stat(). */
3837 # endif /* getmntent+hasmntopt */
3840 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3842 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3844 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3845 return ((!check_okay) || on_nosuid || on_noexec);
3847 #endif /* IAMSUID */
3850 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3851 int fdscript, int suidscript)
3856 #endif /* IAMSUID */
3858 /* do we need to emulate setuid on scripts? */
3860 /* This code is for those BSD systems that have setuid #! scripts disabled
3861 * in the kernel because of a security problem. Merely defining DOSUID
3862 * in perl will not fix that problem, but if you have disabled setuid
3863 * scripts in the kernel, this will attempt to emulate setuid and setgid
3864 * on scripts that have those now-otherwise-useless bits set. The setuid
3865 * root version must be called suidperl or sperlN.NNN. If regular perl
3866 * discovers that it has opened a setuid script, it calls suidperl with
3867 * the same argv that it had. If suidperl finds that the script it has
3868 * just opened is NOT setuid root, it sets the effective uid back to the
3869 * uid. We don't just make perl setuid root because that loses the
3870 * effective uid we had before invoking perl, if it was different from the
3873 * Description/comments above do not match current workings:
3874 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3875 * suidperl called with script open and name changed to /dev/fd/N/X;
3876 * suidperl croaks if script is not setuid;
3877 * making perl setuid would be a huge security risk (and yes, that
3878 * would lose any euid we might have had).
3880 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3881 * be defined in suidperl only. suidperl must be setuid root. The
3882 * Configure script will set this up for you if you want it.
3888 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3889 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3890 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3892 const char *linestr;
3896 if (fdscript < 0 || suidscript != 1)
3897 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3899 * Since the script is opened by perl, not suidperl, some of these
3900 * checks are superfluous. Leaving them in probably does not lower
3904 * Do checks even for systems with no HAS_SETREUID.
3905 * We used to swap, then re-swap UIDs with
3907 if (setreuid(PL_euid,PL_uid) < 0
3908 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3909 Perl_croak(aTHX_ "Can't swap uid and euid");
3912 if (setreuid(PL_uid,PL_euid) < 0
3913 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3914 Perl_croak(aTHX_ "Can't reswap uid and euid");
3918 /* On this access check to make sure the directories are readable,
3919 * there is actually a small window that the user could use to make
3920 * filename point to an accessible directory. So there is a faint
3921 * chance that someone could execute a setuid script down in a
3922 * non-accessible directory. I don't know what to do about that.
3923 * But I don't think it's too important. The manual lies when
3924 * it says access() is useful in setuid programs.
3926 * So, access() is pretty useless... but not harmful... do anyway.
3928 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3929 Perl_croak(aTHX_ "Can't access() script\n");
3932 /* If we can swap euid and uid, then we can determine access rights
3933 * with a simple stat of the file, and then compare device and
3934 * inode to make sure we did stat() on the same file we opened.
3935 * Then we just have to make sure he or she can execute it.
3938 * As the script is opened by perl, not suidperl, we do not need to
3939 * care much about access rights.
3941 * The 'script changed' check is needed, or we can get lied to
3942 * about $0 with e.g.
3943 * suidperl /dev/fd/4//bin/x 4<setuidscript
3944 * Without HAS_SETREUID, is it safe to stat() as root?
3946 * Are there any operating systems that pass /dev/fd/xxx for setuid
3947 * scripts, as suggested/described in perlsec(1)? Surely they do not
3948 * pass the script name as we do, so the "script changed" test would
3949 * fail for them... but we never get here with
3950 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3952 * This is one place where we must "lie" about return status: not
3953 * say if the stat() failed. We are doing this as root, and could
3954 * be tricked into reporting existence or not of files that the
3955 * "plain" user cannot even see.
3959 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3960 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3961 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3962 Perl_croak(aTHX_ "Setuid script changed\n");
3966 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3967 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3970 * We used to do this check as the "plain" user (after swapping
3971 * UIDs). But the check for nosuid and noexec filesystem is needed,
3972 * and should be done even without HAS_SETREUID. (Maybe those
3973 * operating systems do not have such mount options anyway...)
3974 * Seems safe enough to do as root.
3976 #if !defined(NO_NOSUID_CHECK)
3977 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3978 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3981 #endif /* IAMSUID */
3983 if (!S_ISREG(PL_statbuf.st_mode)) {
3984 Perl_croak(aTHX_ "Setuid script not plain file\n");
3986 if (PL_statbuf.st_mode & S_IWOTH)
3987 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3988 PL_doswitches = FALSE; /* -s is insecure in suid */
3989 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3990 CopLINE_inc(PL_curcop);
3991 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3992 Perl_croak(aTHX_ "No #! line");
3993 linestr = SvPV_nolen_const(PL_linestr);
3994 /* required even on Sys V */
3995 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3996 Perl_croak(aTHX_ "No #! line");
4000 /* Sanity check on line length */
4001 s_end = s + strlen(s);
4002 if (s_end == s || (s_end - s) > 4000)
4003 Perl_croak(aTHX_ "Very long #! line");
4004 /* Allow more than a single space after #! */
4005 while (isSPACE(*s)) s++;
4006 /* Sanity check on buffer end */
4007 while ((*s) && !isSPACE(*s)) s++;
4008 for (s2 = s; (s2 > linestr &&
4009 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4010 || s2[-1] == '-')); s2--) ;
4011 /* Sanity check on buffer start */
4012 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4013 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4014 Perl_croak(aTHX_ "Not a perl script");
4015 while (*s == ' ' || *s == '\t') s++;
4017 * #! arg must be what we saw above. They can invoke it by
4018 * mentioning suidperl explicitly, but they may not add any strange
4019 * arguments beyond what #! says if they do invoke suidperl that way.
4022 * The way validarg was set up, we rely on the kernel to start
4023 * scripts with argv[1] set to contain all #! line switches (the
4027 * Check that we got all the arguments listed in the #! line (not
4028 * just that there are no extraneous arguments). Might not matter
4029 * much, as switches from #! line seem to be acted upon (also), and
4030 * so may be checked and trapped in perl. But, security checks must
4031 * be done in suidperl and not deferred to perl. Note that suidperl
4032 * does not get around to parsing (and checking) the switches on
4033 * the #! line (but execs perl sooner).
4034 * Allow (require) a trailing newline (which may be of two
4035 * characters on some architectures?) (but no other trailing
4038 len = strlen(validarg);
4039 if (strEQ(validarg," PHOOEY ") ||
4040 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4041 !((s_end - s) == len+1
4042 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4043 Perl_croak(aTHX_ "Args must match #! line");
4047 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4048 PL_euid == PL_statbuf.st_uid)
4050 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4051 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4052 #endif /* IAMSUID */
4055 PL_euid) { /* oops, we're not the setuid root perl */
4057 * When root runs a setuid script, we do not go through the same
4058 * steps of execing sperl and then perl with fd scripts, but
4059 * simply set up UIDs within the same perl invocation; so do
4060 * not have the same checks (on options, whatever) that we have
4061 * for plain users. No problem really: would have to be a script
4062 * that does not actually work for plain users; and if root is
4063 * foolish and can be persuaded to run such an unsafe script, he
4064 * might run also non-setuid ones, and deserves what he gets.
4066 * Or, we might drop the PL_euid check above (and rely just on
4067 * fdscript to avoid loops), and do the execs
4073 * Pass fd script to suidperl.
4074 * Exec suidperl, substituting fd script for scriptname.
4075 * Pass script name as "subdir" of fd, which perl will grok;
4076 * in fact will use that to distinguish this from "normal"
4077 * usage, see comments above.
4079 PerlIO_rewind(PL_rsfp);
4080 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4081 /* PSz 27 Feb 04 Sanity checks on scriptname */
4082 if ((!scriptname) || (!*scriptname) ) {
4083 Perl_croak(aTHX_ "No setuid script name\n");
4085 if (*scriptname == '-') {
4086 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4087 /* Or we might confuse it with an option when replacing
4088 * name in argument list, below (though we do pointer, not
4089 * string, comparisons).
4092 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4093 if (!PL_origargv[which]) {
4094 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4096 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4097 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4098 #if defined(HAS_FCNTL) && defined(F_SETFD)
4099 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4102 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4103 (int)PERL_REVISION, (int)PERL_VERSION,
4104 (int)PERL_SUBVERSION), PL_origargv);
4106 #endif /* IAMSUID */
4107 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4110 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4112 * This seems back to front: we try HAS_SETEGID first; if not available
4113 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4114 * in the sense that we only want to set EGID; but are there any machines
4115 * with either of the latter, but not the former? Same with UID, later.
4118 (void)setegid(PL_statbuf.st_gid);
4121 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4123 #ifdef HAS_SETRESGID
4124 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4126 PerlProc_setgid(PL_statbuf.st_gid);
4130 if (PerlProc_getegid() != PL_statbuf.st_gid)
4131 Perl_croak(aTHX_ "Can't do setegid!\n");
4133 if (PL_statbuf.st_mode & S_ISUID) {
4134 if (PL_statbuf.st_uid != PL_euid)
4136 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4139 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4141 #ifdef HAS_SETRESUID
4142 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4144 PerlProc_setuid(PL_statbuf.st_uid);
4148 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4149 Perl_croak(aTHX_ "Can't do seteuid!\n");
4151 else if (PL_uid) { /* oops, mustn't run as root */
4153 (void)seteuid((Uid_t)PL_uid);
4156 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4158 #ifdef HAS_SETRESUID
4159 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4161 PerlProc_setuid((Uid_t)PL_uid);
4165 if (PerlProc_geteuid() != PL_uid)
4166 Perl_croak(aTHX_ "Can't do seteuid!\n");
4169 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4170 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4173 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4174 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4175 else if (fdscript < 0 || suidscript != 1)
4176 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4177 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4179 /* PSz 16 Sep 03 Keep neat error message */
4180 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4183 /* We absolutely must clear out any saved ids here, so we */
4184 /* exec the real perl, substituting fd script for scriptname. */
4185 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4187 * It might be thought that using setresgid and/or setresuid (changed to
4188 * set the saved IDs) above might obviate the need to exec, and we could
4189 * go on to "do the perl thing".
4191 * Is there such a thing as "saved GID", and is that set for setuid (but
4192 * not setgid) execution like suidperl? Without exec, it would not be
4193 * cleared for setuid (but not setgid) scripts (or might need a dummy
4196 * We need suidperl to do the exact same argument checking that perl
4197 * does. Thus it cannot be very small; while it could be significantly
4198 * smaller, it is safer (simpler?) to make it essentially the same
4199 * binary as perl (but they are not identical). - Maybe could defer that
4200 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4201 * but prefer to do thorough checks in suidperl itself. Such deferral
4202 * would make suidperl security rely on perl, a design no-no.
4204 * Setuid things should be short and simple, thus easy to understand and
4205 * verify. They should do their "own thing", without influence by
4206 * attackers. It may help if their internal execution flow is fixed,
4207 * regardless of platform: it may be best to exec anyway.
4209 * Suidperl should at least be conceptually simple: a wrapper only,
4210 * never to do any real perl. Maybe we should put
4212 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4214 * into the perly bits.
4216 PerlIO_rewind(PL_rsfp);
4217 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4219 * Keep original arguments: suidperl already has fd script.
4221 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4222 /* if (!PL_origargv[which]) { */
4223 /* errno = EPERM; */
4224 /* Perl_croak(aTHX_ "Permission denied\n"); */
4226 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4227 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4228 #if defined(HAS_FCNTL) && defined(F_SETFD)
4229 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4232 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4233 (int)PERL_REVISION, (int)PERL_VERSION,
4234 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4236 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4237 #endif /* IAMSUID */
4239 PERL_UNUSED_ARG(fdscript);
4240 PERL_UNUSED_ARG(suidscript);
4241 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4242 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4243 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4244 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4246 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4249 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4250 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4251 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4252 /* not set-id, must be wrapped */
4255 PERL_UNUSED_ARG(validarg);
4256 PERL_UNUSED_ARG(scriptname);
4260 S_find_beginning(pTHX)
4264 register const char *s2;
4265 #ifdef MACOS_TRADITIONAL
4269 /* skip forward in input to the real script? */
4271 #ifdef MACOS_TRADITIONAL
4272 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4274 while (PL_doextract || gMacPerl_AlwaysExtract) {
4275 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4276 if (!gMacPerl_AlwaysExtract)
4277 Perl_croak(aTHX_ "No Perl script found in input\n");
4279 if (PL_doextract) /* require explicit override ? */
4280 if (!OverrideExtract(PL_origfilename))
4281 Perl_croak(aTHX_ "User aborted script\n");
4283 PL_doextract = FALSE;
4285 /* Pater peccavi, file does not have #! */
4286 PerlIO_rewind(PL_rsfp);
4291 while (PL_doextract) {
4292 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4293 Perl_croak(aTHX_ "No Perl script found in input\n");
4296 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4297 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4298 PL_doextract = FALSE;
4299 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4301 while (*s == ' ' || *s == '\t') s++;
4303 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4304 || s2[-1] == '_') s2--;
4305 if (strnEQ(s2-4,"perl",4))
4306 while ((s = moreswitches(s)))
4309 #ifdef MACOS_TRADITIONAL
4310 /* We are always searching for the #!perl line in MacPerl,
4311 * so if we find it, still keep the line count correct
4312 * by counting lines we already skipped over
4314 for (; maclines > 0 ; maclines--)
4315 PerlIO_ungetc(PL_rsfp, '\n');
4319 /* gMacPerl_AlwaysExtract is false in MPW tool */
4320 } else if (gMacPerl_AlwaysExtract) {
4332 PL_uid = PerlProc_getuid();
4333 PL_euid = PerlProc_geteuid();
4334 PL_gid = PerlProc_getgid();
4335 PL_egid = PerlProc_getegid();
4337 PL_uid |= PL_gid << 16;
4338 PL_euid |= PL_egid << 16;
4340 /* Should not happen: */
4341 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4342 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4345 * Should go by suidscript, not uid!=euid: why disallow
4346 * system("ls") in scripts run from setuid things?
4347 * Or, is this run before we check arguments and set suidscript?
4348 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4349 * (We never have suidscript, can we be sure to have fdscript?)
4350 * Or must then go by UID checks? See comments in forbid_setid also.
4354 /* This is used very early in the lifetime of the program,
4355 * before even the options are parsed, so PL_tainting has
4356 * not been initialized properly. */
4358 Perl_doing_taint(int argc, char *argv[], char *envp[])
4360 #ifndef PERL_IMPLICIT_SYS
4361 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4362 * before we have an interpreter-- and the whole point of this
4363 * function is to be called at such an early stage. If you are on
4364 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4365 * "tainted because running with altered effective ids', you'll
4366 * have to add your own checks somewhere in here. The two most
4367 * known samples of 'implicitness' are Win32 and NetWare, neither
4368 * of which has much of concept of 'uids'. */
4369 int uid = PerlProc_getuid();
4370 int euid = PerlProc_geteuid();
4371 int gid = PerlProc_getgid();
4372 int egid = PerlProc_getegid();
4379 if (uid && (euid != uid || egid != gid))
4381 #endif /* !PERL_IMPLICIT_SYS */
4382 /* This is a really primitive check; environment gets ignored only
4383 * if -T are the first chars together; otherwise one gets
4384 * "Too late" message. */
4385 if ( argc > 1 && argv[1][0] == '-'
4386 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4391 /* Passing the flag as a single char rather than a string is a slight space
4392 optimisation. The only message that isn't /^-.$/ is
4393 "program input from stdin", which is substituted in place of '\0', which
4394 could never be a command line flag. */
4396 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4399 char string[3] = "-x";
4400 const char *message = "program input from stdin";
4407 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4408 if (PL_euid != PL_uid)
4409 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4410 if (PL_egid != PL_gid)
4411 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4412 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4414 * Checks for UID/GID above "wrong": why disallow
4415 * perl -e 'print "Hello\n"'
4416 * from within setuid things?? Simply drop them: replaced by
4417 * fdscript/suidscript and #ifdef IAMSUID checks below.
4419 * This may be too late for command-line switches. Will catch those on
4420 * the #! line, after finding the script name and setting up
4421 * fdscript/suidscript. Note that suidperl does not get around to
4422 * parsing (and checking) the switches on the #! line, but checks that
4423 * the two sets are identical.
4425 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4426 * instead, or would that be "too late"? (We never have suidscript, can
4427 * we be sure to have fdscript?)
4429 * Catch things with suidscript (in descendant of suidperl), even with
4430 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4431 * below; but I am paranoid.
4433 * Also see comments about root running a setuid script, elsewhere.
4435 if (suidscript >= 0)
4436 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4438 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4439 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4440 #endif /* IAMSUID */
4444 Perl_init_debugger(pTHX)
4447 HV * const ostash = PL_curstash;
4449 PL_curstash = PL_debstash;
4450 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4452 AvREAL_off(PL_dbargs);
4453 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4454 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4455 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4456 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4457 sv_setiv(PL_DBsingle, 0);
4458 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4459 sv_setiv(PL_DBtrace, 0);
4460 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4461 sv_setiv(PL_DBsignal, 0);
4462 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4463 sv_setiv(PL_DBassertion, 0);
4464 PL_curstash = ostash;
4467 #ifndef STRESS_REALLOC
4468 #define REASONABLE(size) (size)
4470 #define REASONABLE(size) (1) /* unreasonable */
4474 Perl_init_stacks(pTHX)
4477 /* start with 128-item stack and 8K cxstack */
4478 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4479 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4480 PL_curstackinfo->si_type = PERLSI_MAIN;
4481 PL_curstack = PL_curstackinfo->si_stack;
4482 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4484 PL_stack_base = AvARRAY(PL_curstack);
4485 PL_stack_sp = PL_stack_base;
4486 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4488 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4491 PL_tmps_max = REASONABLE(128);
4493 Newx(PL_markstack,REASONABLE(32),I32);
4494 PL_markstack_ptr = PL_markstack;
4495 PL_markstack_max = PL_markstack + REASONABLE(32);
4499 Newx(PL_scopestack,REASONABLE(32),I32);
4500 PL_scopestack_ix = 0;
4501 PL_scopestack_max = REASONABLE(32);
4503 Newx(PL_savestack,REASONABLE(128),ANY);
4504 PL_savestack_ix = 0;
4505 PL_savestack_max = REASONABLE(128);
4514 while (PL_curstackinfo->si_next)
4515 PL_curstackinfo = PL_curstackinfo->si_next;
4516 while (PL_curstackinfo) {
4517 PERL_SI *p = PL_curstackinfo->si_prev;
4518 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4519 Safefree(PL_curstackinfo->si_cxstack);
4520 Safefree(PL_curstackinfo);
4521 PL_curstackinfo = p;
4523 Safefree(PL_tmps_stack);
4524 Safefree(PL_markstack);
4525 Safefree(PL_scopestack);
4526 Safefree(PL_savestack);
4536 lex_start(PL_linestr);
4538 PL_subname = newSVpvs("main");
4542 S_init_predump_symbols(pTHX)
4548 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4549 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4550 GvMULTI_on(PL_stdingv);
4551 io = GvIOp(PL_stdingv);
4552 IoTYPE(io) = IoTYPE_RDONLY;
4553 IoIFP(io) = PerlIO_stdin();
4554 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4556 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4558 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4561 IoTYPE(io) = IoTYPE_WRONLY;
4562 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4564 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4566 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4568 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4569 GvMULTI_on(PL_stderrgv);
4570 io = GvIOp(PL_stderrgv);
4571 IoTYPE(io) = IoTYPE_WRONLY;
4572 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4573 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4575 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4577 PL_statname = newSV(0); /* last filename we did stat on */
4579 Safefree(PL_osname);
4580 PL_osname = savepv(OSNAME);
4584 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4587 argc--,argv++; /* skip name of script */
4588 if (PL_doswitches) {
4589 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4593 if (argv[0][1] == '-' && !argv[0][2]) {
4597 if ((s = strchr(argv[0], '='))) {
4598 const char *const start_name = argv[0] + 1;
4599 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4600 TRUE, SVt_PV)), s + 1);
4603 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4606 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4607 GvMULTI_on(PL_argvgv);
4608 (void)gv_AVadd(PL_argvgv);
4609 av_clear(GvAVn(PL_argvgv));
4610 for (; argc > 0; argc--,argv++) {
4611 SV * const sv = newSVpv(argv[0],0);
4612 av_push(GvAVn(PL_argvgv),sv);
4613 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4614 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4617 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4618 (void)sv_utf8_decode(sv);
4624 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4629 PL_toptarget = newSV(0);
4630 sv_upgrade(PL_toptarget, SVt_PVFM);
4631 sv_setpvn(PL_toptarget, "", 0);
4632 PL_bodytarget = newSV(0);
4633 sv_upgrade(PL_bodytarget, SVt_PVFM);
4634 sv_setpvn(PL_bodytarget, "", 0);
4635 PL_formtarget = PL_bodytarget;
4639 init_argv_symbols(argc,argv);
4641 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4642 #ifdef MACOS_TRADITIONAL
4643 /* $0 is not majick on a Mac */
4644 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4646 sv_setpv(GvSV(tmpgv),PL_origfilename);
4647 magicname("0", "0", 1);
4650 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4652 GvMULTI_on(PL_envgv);
4653 hv = GvHVn(PL_envgv);
4654 hv_magic(hv, NULL, PERL_MAGIC_env);
4656 #ifdef USE_ENVIRON_ARRAY
4657 /* Note that if the supplied env parameter is actually a copy
4658 of the global environ then it may now point to free'd memory
4659 if the environment has been modified since. To avoid this
4660 problem we treat env==NULL as meaning 'use the default'
4665 # ifdef USE_ITHREADS
4666 && PL_curinterp == aTHX
4673 char** origenv = environ;
4676 for (; *env; env++) {
4677 if (!(s = strchr(*env,'=')) || s == *env)
4679 #if defined(MSDOS) && !defined(DJGPP)
4684 sv = newSVpv(s+1, 0);
4685 (void)hv_store(hv, *env, s - *env, sv, 0);
4688 if (origenv != environ) {
4689 /* realloc has shifted us */
4690 env = (env - origenv) + environ;
4695 #endif /* USE_ENVIRON_ARRAY */
4696 #endif /* !PERL_MICRO */
4699 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4700 SvREADONLY_off(GvSV(tmpgv));
4701 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4702 SvREADONLY_on(GvSV(tmpgv));
4704 #ifdef THREADS_HAVE_PIDS
4705 PL_ppid = (IV)getppid();
4708 /* touch @F array to prevent spurious warnings 20020415 MJD */
4710 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4712 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4713 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4714 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4718 S_init_perllib(pTHX)
4724 s = PerlEnv_getenv("PERL5LIB");
4726 * It isn't possible to delete an environment variable with
4727 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4728 * case we treat PERL5LIB as undefined if it has a zero-length value.
4730 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4731 if (s && *s != '\0')
4735 incpush(s, TRUE, TRUE, TRUE, FALSE);
4737 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4739 /* Treat PERL5?LIB as a possible search list logical name -- the
4740 * "natural" VMS idiom for a Unix path string. We allow each
4741 * element to be a set of |-separated directories for compatibility.
4745 if (my_trnlnm("PERL5LIB",buf,0))
4746 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4748 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4752 /* Use the ~-expanded versions of APPLLIB (undocumented),
4753 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4756 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4760 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4762 #ifdef MACOS_TRADITIONAL
4765 SV * privdir = newSV(0);
4766 char * macperl = PerlEnv_getenv("MACPERL");
4771 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4772 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4773 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4774 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4775 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4776 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4778 SvREFCNT_dec(privdir);
4781 incpush(":", FALSE, FALSE, TRUE, FALSE);
4784 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4787 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4789 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4793 /* sitearch is always relative to sitelib on Windows for
4794 * DLL-based path intuition to work correctly */
4795 # if !defined(WIN32)
4796 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4802 /* this picks up sitearch as well */
4803 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4805 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4809 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4810 /* Search for version-specific dirs below here */
4811 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4814 #ifdef PERL_VENDORARCH_EXP
4815 /* vendorarch is always relative to vendorlib on Windows for
4816 * DLL-based path intuition to work correctly */
4817 # if !defined(WIN32)
4818 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4822 #ifdef PERL_VENDORLIB_EXP
4824 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4826 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4830 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4831 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4834 #ifdef PERL_OTHERLIBDIRS
4835 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4839 incpush(".", FALSE, FALSE, TRUE, FALSE);
4840 #endif /* MACOS_TRADITIONAL */
4843 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4844 # define PERLLIB_SEP ';'
4847 # define PERLLIB_SEP '|'
4849 # if defined(MACOS_TRADITIONAL)
4850 # define PERLLIB_SEP ','
4852 # define PERLLIB_SEP ':'
4856 #ifndef PERLLIB_MANGLE
4857 # define PERLLIB_MANGLE(s,n) (s)
4860 /* Push a directory onto @INC if it exists.
4861 Generate a new SV if we do this, to save needing to copy the SV we push
4864 S_incpush_if_exists(pTHX_ SV *dir)
4868 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4869 S_ISDIR(tmpstatbuf.st_mode)) {
4870 av_push(GvAVn(PL_incgv), dir);
4877 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4882 const char *p = dir;
4887 if (addsubdirs || addoldvers) {
4891 /* Break at all separators */
4893 SV *libdir = newSV(0);
4896 /* skip any consecutive separators */
4898 while ( *p == PERLLIB_SEP ) {
4899 /* Uncomment the next line for PATH semantics */
4900 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4905 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4906 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4911 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4912 p = NULL; /* break out */
4914 #ifdef MACOS_TRADITIONAL
4915 if (!strchr(SvPVX(libdir), ':')) {
4918 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4920 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4921 sv_catpvs(libdir, ":");
4924 /* Do the if() outside the #ifdef to avoid warnings about an unused
4927 #ifdef PERL_RELOCATABLE_INC
4929 * Relocatable include entries are marked with a leading .../
4932 * 0: Remove that leading ".../"
4933 * 1: Remove trailing executable name (anything after the last '/')
4934 * from the perl path to give a perl prefix
4936 * While the @INC element starts "../" and the prefix ends with a real
4937 * directory (ie not . or ..) chop that real directory off the prefix
4938 * and the leading "../" from the @INC element. ie a logical "../"
4940 * Finally concatenate the prefix and the remainder of the @INC element
4941 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4942 * generates /usr/local/lib/perl5
4944 const char *libpath = SvPVX(libdir);
4945 STRLEN libpath_len = SvCUR(libdir);
4946 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4948 SV * const caret_X = get_sv("\030", 0);
4949 /* Going to use the SV just as a scratch buffer holding a C
4955 /* $^X is *the* source of taint if tainting is on, hence
4956 SvPOK() won't be true. */
4958 assert(SvPOKp(caret_X));
4959 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4960 /* Firstly take off the leading .../
4961 If all else fail we'll do the paths relative to the current
4963 sv_chop(libdir, libpath + 4);
4964 /* Don't use SvPV as we're intentionally bypassing taining,
4965 mortal copies that the mg_get of tainting creates, and
4966 corruption that seems to come via the save stack.
4967 I guess that the save stack isn't correctly set up yet. */
4968 libpath = SvPVX(libdir);
4969 libpath_len = SvCUR(libdir);
4971 /* This would work more efficiently with memrchr, but as it's
4972 only a GNU extension we'd need to probe for it and
4973 implement our own. Not hard, but maybe not worth it? */
4975 prefix = SvPVX(prefix_sv);
4976 lastslash = strrchr(prefix, '/');
4978 /* First time in with the *lastslash = '\0' we just wipe off
4979 the trailing /perl from (say) /usr/foo/bin/perl
4983 while ((*lastslash = '\0'), /* Do that, come what may. */
4984 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4985 && (lastslash = strrchr(prefix, '/')))) {
4986 if (lastslash[1] == '\0'
4987 || (lastslash[1] == '.'
4988 && (lastslash[2] == '/' /* ends "/." */
4989 || (lastslash[2] == '/'
4990 && lastslash[3] == '/' /* or "/.." */
4992 /* Prefix ends "/" or "/." or "/..", any of which
4993 are fishy, so don't do any more logical cleanup.
4997 /* Remove leading "../" from path */
5000 /* Next iteration round the loop removes the last
5001 directory name from prefix by writing a '\0' in
5002 the while clause. */
5004 /* prefix has been terminated with a '\0' to the correct
5005 length. libpath points somewhere into the libdir SV.
5006 We need to join the 2 with '/' and drop the result into
5008 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5009 SvREFCNT_dec(libdir);
5010 /* And this is the new libdir. */
5013 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5014 /* Need to taint reloccated paths if running set ID */
5015 SvTAINTED_on(libdir);
5018 SvREFCNT_dec(prefix_sv);
5023 * BEFORE pushing libdir onto @INC we may first push version- and
5024 * archname-specific sub-directories.
5026 if (addsubdirs || addoldvers) {
5027 #ifdef PERL_INC_VERSION_LIST
5028 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5029 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5030 const char * const *incver;
5036 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5038 while (unix[len-1] == '/') len--; /* Cosmetic */
5039 sv_usepvn(libdir,unix,len);
5042 PerlIO_printf(Perl_error_log,
5043 "Failed to unixify @INC element \"%s\"\n",
5047 #ifdef MACOS_TRADITIONAL
5048 #define PERL_AV_SUFFIX_FMT ""
5049 #define PERL_ARCH_FMT "%s:"
5050 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5052 #define PERL_AV_SUFFIX_FMT "/"
5053 #define PERL_ARCH_FMT "/%s"
5054 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5056 /* .../version/archname if -d .../version/archname */
5057 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5059 (int)PERL_REVISION, (int)PERL_VERSION,
5060 (int)PERL_SUBVERSION, ARCHNAME);
5061 subdir = S_incpush_if_exists(aTHX_ subdir);
5063 /* .../version if -d .../version */
5064 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5066 (int)PERL_REVISION, (int)PERL_VERSION,
5067 (int)PERL_SUBVERSION);
5068 subdir = S_incpush_if_exists(aTHX_ subdir);
5070 /* .../archname if -d .../archname */
5071 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5072 (void*)libdir, ARCHNAME);
5073 subdir = S_incpush_if_exists(aTHX_ subdir);
5077 #ifdef PERL_INC_VERSION_LIST
5079 for (incver = incverlist; *incver; incver++) {
5080 /* .../xxx if -d .../xxx */
5081 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, (void *)libdir, *incver);
5082 subdir = S_incpush_if_exists(aTHX_ subdir);
5088 /* finally push this lib directory on the end of @INC */
5089 av_push(GvAVn(PL_incgv), libdir);
5092 assert (SvREFCNT(subdir) == 1);
5093 SvREFCNT_dec(subdir);
5099 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5103 const line_t oldline = CopLINE(PL_curcop);
5109 while (av_len(paramList) >= 0) {
5110 cv = (CV*)av_shift(paramList);
5112 if (paramList == PL_beginav) {
5113 /* save PL_beginav for compiler */
5114 if (! PL_beginav_save)
5115 PL_beginav_save = newAV();
5116 av_push(PL_beginav_save, (SV*)cv);
5118 else if (paramList == PL_checkav) {
5119 /* save PL_checkav for compiler */
5120 if (! PL_checkav_save)
5121 PL_checkav_save = newAV();
5122 av_push(PL_checkav_save, (SV*)cv);
5124 else if (paramList == PL_unitcheckav) {
5125 /* save PL_unitcheckav for compiler */
5126 if (! PL_unitcheckav_save)
5127 PL_unitcheckav_save = newAV();
5128 av_push(PL_unitcheckav_save, (SV*)cv);
5139 PL_madskills |= 16384;
5144 PL_madskills &= ~16384;
5147 (void)SvPV_const(atsv, len);
5148 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5149 break; /* not really trying to run, so just wing it */
5151 PL_curcop = &PL_compiling;
5152 CopLINE_set(PL_curcop, oldline);
5153 if (paramList == PL_beginav)
5154 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5156 Perl_sv_catpvf(aTHX_ atsv,
5157 "%s failed--call queue aborted",
5158 paramList == PL_checkav ? "CHECK"
5159 : paramList == PL_initav ? "INIT"
5160 : paramList == PL_unitcheckav ? "UNITCHECK"
5162 while (PL_scopestack_ix > oldscope)
5165 Perl_croak(aTHX_ "%"SVf"", (void*)atsv);
5172 /* my_exit() was called */
5173 while (PL_scopestack_ix > oldscope)
5176 PL_curstash = PL_defstash;
5177 PL_curcop = &PL_compiling;
5178 CopLINE_set(PL_curcop, oldline);
5180 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5181 return; /* not really trying to run, so just wing it */
5182 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5183 if (paramList == PL_beginav)
5184 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5186 Perl_croak(aTHX_ "%s failed--call queue aborted",
5187 paramList == PL_checkav ? "CHECK"
5188 : paramList == PL_initav ? "INIT"
5189 : paramList == PL_unitcheckav ? "UNITCHECK"
5196 PL_curcop = &PL_compiling;
5197 CopLINE_set(PL_curcop, oldline);
5200 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5209 Perl_my_exit(pTHX_ U32 status)
5212 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5213 thr, (unsigned long) status));
5222 STATUS_EXIT_SET(status);
5229 Perl_my_failure_exit(pTHX)
5233 /* We have been called to fall on our sword. The desired exit code
5234 * should be already set in STATUS_UNIX, but could be shifted over
5235 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5238 * If an error code has not been set, then force the issue.
5240 if (MY_POSIX_EXIT) {
5242 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5243 * the exit code when there isn't an error.
5246 if (STATUS_UNIX == 0)
5247 STATUS_UNIX_EXIT_SET(255);
5249 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5251 /* The exit code could have been set by $? or vmsish which
5252 * means that it may not be fatal. So convert
5253 * success/warning codes to fatal.
5255 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5256 STATUS_UNIX_EXIT_SET(255);
5260 /* Traditionally Perl on VMS always expects a Fatal Error. */
5261 if (vaxc$errno & 1) {
5263 /* So force success status to failure */
5264 if (STATUS_NATIVE & 1)
5269 STATUS_UNIX = EINTR; /* In case something cares */
5274 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5276 /* Encode the severity code */
5277 severity = STATUS_NATIVE & STS$M_SEVERITY;
5278 STATUS_UNIX = (severity ? severity : 1) << 8;
5280 /* Perl expects this to be a fatal error */
5281 if (severity != STS$K_SEVERE)
5290 STATUS_UNIX_SET(errno);
5292 exitstatus = STATUS_UNIX >> 8;
5293 if (exitstatus & 255)
5294 STATUS_UNIX_SET(exitstatus);
5296 STATUS_UNIX_SET(255);
5303 S_my_exit_jump(pTHX)
5308 SvREFCNT_dec(PL_e_script);
5312 POPSTACK_TO(PL_mainstack);
5320 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5323 const char * const p = SvPVX_const(PL_e_script);
5324 const char *nl = strchr(p, '\n');
5326 PERL_UNUSED_ARG(idx);
5327 PERL_UNUSED_ARG(maxlen);
5329 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5331 filter_del(read_e_script);
5334 sv_catpvn(buf_sv, p, nl-p);
5335 sv_chop(PL_e_script, nl);
5341 * c-indentation-style: bsd
5343 * indent-tabs-mode: t
5346 * ex: set ts=8 sts=4 sw=4 noet: