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)
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
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_initav);
949 PL_beginav_save = NULL;
952 PL_checkav_save = NULL;
955 /* shortcuts just get cleared */
964 PL_last_in_gv = NULL;
972 PL_DBassertion = NULL;
977 SvREFCNT_dec(PL_argvout_stack);
978 PL_argvout_stack = NULL;
980 SvREFCNT_dec(PL_modglobal);
982 SvREFCNT_dec(PL_preambleav);
983 PL_preambleav = NULL;
984 SvREFCNT_dec(PL_subname);
986 SvREFCNT_dec(PL_linestr);
988 #ifdef PERL_USES_PL_PIDSTATUS
989 SvREFCNT_dec(PL_pidstatus);
992 SvREFCNT_dec(PL_toptarget);
994 SvREFCNT_dec(PL_bodytarget);
995 PL_bodytarget = NULL;
996 PL_formtarget = NULL;
998 /* free locale stuff */
999 #ifdef USE_LOCALE_COLLATE
1000 Safefree(PL_collation_name);
1001 PL_collation_name = NULL;
1004 #ifdef USE_LOCALE_NUMERIC
1005 Safefree(PL_numeric_name);
1006 PL_numeric_name = NULL;
1007 SvREFCNT_dec(PL_numeric_radix_sv);
1008 PL_numeric_radix_sv = NULL;
1011 /* clear utf8 character classes */
1012 SvREFCNT_dec(PL_utf8_alnum);
1013 SvREFCNT_dec(PL_utf8_alnumc);
1014 SvREFCNT_dec(PL_utf8_ascii);
1015 SvREFCNT_dec(PL_utf8_alpha);
1016 SvREFCNT_dec(PL_utf8_space);
1017 SvREFCNT_dec(PL_utf8_cntrl);
1018 SvREFCNT_dec(PL_utf8_graph);
1019 SvREFCNT_dec(PL_utf8_digit);
1020 SvREFCNT_dec(PL_utf8_upper);
1021 SvREFCNT_dec(PL_utf8_lower);
1022 SvREFCNT_dec(PL_utf8_print);
1023 SvREFCNT_dec(PL_utf8_punct);
1024 SvREFCNT_dec(PL_utf8_xdigit);
1025 SvREFCNT_dec(PL_utf8_mark);
1026 SvREFCNT_dec(PL_utf8_toupper);
1027 SvREFCNT_dec(PL_utf8_totitle);
1028 SvREFCNT_dec(PL_utf8_tolower);
1029 SvREFCNT_dec(PL_utf8_tofold);
1030 SvREFCNT_dec(PL_utf8_idstart);
1031 SvREFCNT_dec(PL_utf8_idcont);
1032 PL_utf8_alnum = NULL;
1033 PL_utf8_alnumc = NULL;
1034 PL_utf8_ascii = NULL;
1035 PL_utf8_alpha = NULL;
1036 PL_utf8_space = NULL;
1037 PL_utf8_cntrl = NULL;
1038 PL_utf8_graph = NULL;
1039 PL_utf8_digit = NULL;
1040 PL_utf8_upper = NULL;
1041 PL_utf8_lower = NULL;
1042 PL_utf8_print = NULL;
1043 PL_utf8_punct = NULL;
1044 PL_utf8_xdigit = NULL;
1045 PL_utf8_mark = NULL;
1046 PL_utf8_toupper = NULL;
1047 PL_utf8_totitle = NULL;
1048 PL_utf8_tolower = NULL;
1049 PL_utf8_tofold = NULL;
1050 PL_utf8_idstart = NULL;
1051 PL_utf8_idcont = NULL;
1053 if (!specialWARN(PL_compiling.cop_warnings))
1054 PerlMemShared_free(PL_compiling.cop_warnings);
1055 PL_compiling.cop_warnings = NULL;
1056 if (!specialCopIO(PL_compiling.cop_io))
1057 SvREFCNT_dec(PL_compiling.cop_io);
1058 PL_compiling.cop_io = NULL;
1059 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1060 PL_compiling.cop_hints_hash = NULL;
1061 CopFILE_free(&PL_compiling);
1062 CopSTASH_free(&PL_compiling);
1064 /* Prepare to destruct main symbol table. */
1069 SvREFCNT_dec(PL_curstname);
1070 PL_curstname = NULL;
1072 /* clear queued errors */
1073 SvREFCNT_dec(PL_errors);
1077 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1078 if (PL_scopestack_ix != 0)
1079 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1080 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1081 (long)PL_scopestack_ix);
1082 if (PL_savestack_ix != 0)
1083 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1084 "Unbalanced saves: %ld more saves than restores\n",
1085 (long)PL_savestack_ix);
1086 if (PL_tmps_floor != -1)
1087 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1088 (long)PL_tmps_floor + 1);
1089 if (cxstack_ix != -1)
1090 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1091 (long)cxstack_ix + 1);
1094 /* Now absolutely destruct everything, somehow or other, loops or no. */
1095 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1096 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1098 /* the 2 is for PL_fdpid and PL_strtab */
1099 while (PL_sv_count > 2 && sv_clean_all())
1102 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1103 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1104 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1105 SvFLAGS(PL_strtab) |= SVt_PVHV;
1107 AvREAL_off(PL_fdpid); /* no surviving entries */
1108 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1111 #ifdef HAVE_INTERP_INTERN
1115 /* Destruct the global string table. */
1117 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1118 * so that sv_free() won't fail on them.
1119 * Now that the global string table is using a single hunk of memory
1120 * for both HE and HEK, we either need to explicitly unshare it the
1121 * correct way, or actually free things here.
1124 const I32 max = HvMAX(PL_strtab);
1125 HE * const * const array = HvARRAY(PL_strtab);
1126 HE *hent = array[0];
1129 if (hent && ckWARN_d(WARN_INTERNAL)) {
1130 HE * const next = HeNEXT(hent);
1131 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1132 "Unbalanced string table refcount: (%ld) for \"%s\"",
1133 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1140 hent = array[riter];
1145 HvARRAY(PL_strtab) = 0;
1146 HvTOTALKEYS(PL_strtab) = 0;
1147 HvFILL(PL_strtab) = 0;
1149 SvREFCNT_dec(PL_strtab);
1152 /* free the pointer tables used for cloning */
1153 ptr_table_free(PL_ptr_table);
1154 PL_ptr_table = (PTR_TBL_t*)NULL;
1157 /* free special SVs */
1159 SvREFCNT(&PL_sv_yes) = 0;
1160 sv_clear(&PL_sv_yes);
1161 SvANY(&PL_sv_yes) = NULL;
1162 SvFLAGS(&PL_sv_yes) = 0;
1164 SvREFCNT(&PL_sv_no) = 0;
1165 sv_clear(&PL_sv_no);
1166 SvANY(&PL_sv_no) = NULL;
1167 SvFLAGS(&PL_sv_no) = 0;
1171 for (i=0; i<=2; i++) {
1172 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1173 sv_clear(PERL_DEBUG_PAD(i));
1174 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1175 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1179 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1180 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1182 #ifdef DEBUG_LEAKING_SCALARS
1183 if (PL_sv_count != 0) {
1188 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1189 svend = &sva[SvREFCNT(sva)];
1190 for (sv = sva + 1; sv < svend; ++sv) {
1191 if (SvTYPE(sv) != SVTYPEMASK) {
1192 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1194 " refcnt=%"UVuf pTHX__FORMAT "\n"
1195 "\tallocated at %s:%d %s %s%s\n",
1196 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1197 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1199 sv->sv_debug_inpad ? "for" : "by",
1200 sv->sv_debug_optype ?
1201 PL_op_name[sv->sv_debug_optype]: "(none)",
1202 sv->sv_debug_cloned ? " (cloned)" : ""
1204 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1205 Perl_dump_sv_child(aTHX_ sv);
1211 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1215 /* Wait for up to 4 seconds for child to terminate.
1216 This seems to be the least effort way of timing out on reaping
1218 struct timeval waitfor = {4, 0};
1219 int sock = PL_dumper_fd;
1223 FD_SET(sock, &rset);
1224 select(sock + 1, &rset, NULL, NULL, &waitfor);
1225 waitpid(child, &status, WNOHANG);
1233 #if defined(PERLIO_LAYERS)
1234 /* No more IO - including error messages ! */
1235 PerlIO_cleanup(aTHX);
1238 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1239 as currently layers use it rather than NULL as a marker
1240 for no arg - and will try and SvREFCNT_dec it.
1242 SvREFCNT(&PL_sv_undef) = 0;
1243 SvREADONLY_off(&PL_sv_undef);
1245 Safefree(PL_origfilename);
1246 PL_origfilename = NULL;
1247 Safefree(PL_reg_start_tmp);
1248 PL_reg_start_tmp = (char**)NULL;
1249 PL_reg_start_tmpl = 0;
1250 Safefree(PL_reg_curpm);
1251 Safefree(PL_reg_poscache);
1252 free_tied_hv_pool();
1253 Safefree(PL_op_mask);
1254 Safefree(PL_psig_ptr);
1255 PL_psig_ptr = (SV**)NULL;
1256 Safefree(PL_psig_name);
1257 PL_psig_name = (SV**)NULL;
1258 Safefree(PL_bitcount);
1260 Safefree(PL_psig_pend);
1261 PL_psig_pend = (int*)NULL;
1264 PL_tainting = FALSE;
1265 PL_taint_warn = FALSE;
1266 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1269 DEBUG_P(debprofdump());
1271 #ifdef USE_REENTRANT_API
1272 Perl_reentrant_free(aTHX);
1277 while (PL_regmatch_slab) {
1278 regmatch_slab *s = PL_regmatch_slab;
1279 PL_regmatch_slab = PL_regmatch_slab->next;
1283 /* As the absolutely last thing, free the non-arena SV for mess() */
1286 /* we know that type == SVt_PVMG */
1288 /* it could have accumulated taint magic */
1291 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1292 moremagic = mg->mg_moremagic;
1293 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1295 Safefree(mg->mg_ptr);
1299 /* we know that type >= SVt_PV */
1300 SvPV_free(PL_mess_sv);
1301 Safefree(SvANY(PL_mess_sv));
1302 Safefree(PL_mess_sv);
1309 =for apidoc perl_free
1311 Releases a Perl interpreter. See L<perlembed>.
1319 #ifdef PERL_TRACK_MEMPOOL
1322 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1323 * value as we're probably hunting memory leaks then
1325 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1326 if (!s || atoi(s) == 0) {
1327 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1328 thread at thread exit. */
1329 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1330 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1335 #if defined(WIN32) || defined(NETWARE)
1336 # if defined(PERL_IMPLICIT_SYS)
1339 void *host = nw_internal_host;
1341 void *host = w32_internal_host;
1343 PerlMem_free(aTHXx);
1345 nw_delete_internal_host(host);
1347 win32_delete_internal_host(host);
1351 PerlMem_free(aTHXx);
1354 PerlMem_free(aTHXx);
1358 #if defined(USE_ITHREADS)
1359 /* provide destructors to clean up the thread key when libperl is unloaded */
1360 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1362 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1363 #pragma fini "perl_fini"
1364 #elif defined(__sun) && !defined(__GNUC__)
1365 #pragma fini (perl_fini)
1369 #if defined(__GNUC__)
1370 __attribute__((destructor))
1380 #endif /* THREADS */
1383 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1386 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1387 PL_exitlist[PL_exitlistlen].fn = fn;
1388 PL_exitlist[PL_exitlistlen].ptr = ptr;
1392 #ifdef HAS_PROCSELFEXE
1393 /* This is a function so that we don't hold on to MAXPATHLEN
1394 bytes of stack longer than necessary
1397 S_procself_val(pTHX_ SV *sv, const char *arg0)
1399 char buf[MAXPATHLEN];
1400 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1402 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1403 includes a spurious NUL which will cause $^X to fail in system
1404 or backticks (this will prevent extensions from being built and
1405 many tests from working). readlink is not meant to add a NUL.
1406 Normal readlink works fine.
1408 if (len > 0 && buf[len-1] == '\0') {
1412 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1413 returning the text "unknown" from the readlink rather than the path
1414 to the executable (or returning an error from the readlink). Any valid
1415 path has a '/' in it somewhere, so use that to validate the result.
1416 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1418 if (len > 0 && memchr(buf, '/', len)) {
1419 sv_setpvn(sv,buf,len);
1425 #endif /* HAS_PROCSELFEXE */
1428 S_set_caret_X(pTHX) {
1430 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1432 #ifdef HAS_PROCSELFEXE
1433 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1436 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1438 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1445 =for apidoc perl_parse
1447 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1453 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1460 PERL_UNUSED_VAR(my_perl);
1462 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1465 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1466 setuid perl scripts securely.\n");
1467 #endif /* IAMSUID */
1470 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1471 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1472 * This MUST be done before any hash stores or fetches take place.
1473 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1474 * yourself, it is your responsibility to provide a good random seed!
1475 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1476 if (!PL_rehash_seed_set)
1477 PL_rehash_seed = get_hash_seed();
1479 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1481 if (s && (atoi(s) == 1))
1482 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1484 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1489 if (PL_origalen != 0) {
1490 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1493 /* Set PL_origalen be the sum of the contiguous argv[]
1494 * elements plus the size of the env in case that it is
1495 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1496 * as the maximum modifiable length of $0. In the worst case
1497 * the area we are able to modify is limited to the size of
1498 * the original argv[0]. (See below for 'contiguous', though.)
1500 const char *s = NULL;
1503 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1504 /* Do the mask check only if the args seem like aligned. */
1506 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1508 /* See if all the arguments are contiguous in memory. Note
1509 * that 'contiguous' is a loose term because some platforms
1510 * align the argv[] and the envp[]. If the arguments look
1511 * like non-aligned, assume that they are 'strictly' or
1512 * 'traditionally' contiguous. If the arguments look like
1513 * aligned, we just check that they are within aligned
1514 * PTRSIZE bytes. As long as no system has something bizarre
1515 * like the argv[] interleaved with some other data, we are
1516 * fine. (Did I just evoke Murphy's Law?) --jhi */
1517 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1519 for (i = 1; i < PL_origargc; i++) {
1520 if ((PL_origargv[i] == s + 1
1522 || PL_origargv[i] == s + 2
1527 (PL_origargv[i] > s &&
1529 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1539 /* Can we grab env area too to be used as the area for $0? */
1540 if (s && PL_origenviron) {
1541 if ((PL_origenviron[0] == s + 1
1543 || (PL_origenviron[0] == s + 9 && (s += 8))
1548 (PL_origenviron[0] > s &&
1549 PL_origenviron[0] <=
1550 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 s = PL_origenviron[0];
1557 my_setenv("NoNe SuCh", NULL);
1558 /* Force copy of environment. */
1559 for (i = 1; PL_origenviron[i]; i++) {
1560 if (PL_origenviron[i] == s + 1
1563 (PL_origenviron[i] > s &&
1564 PL_origenviron[i] <=
1565 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1568 s = PL_origenviron[i];
1576 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1581 /* Come here if running an undumped a.out. */
1583 PL_origfilename = savepv(argv[0]);
1584 PL_do_undump = FALSE;
1585 cxstack_ix = -1; /* start label stack again */
1587 assert (!PL_tainted);
1589 S_set_caret_X(aTHX);
1591 init_postdump_symbols(argc,argv,env);
1596 op_free(PL_main_root);
1597 PL_main_root = NULL;
1599 PL_main_start = NULL;
1600 SvREFCNT_dec(PL_main_cv);
1604 oldscope = PL_scopestack_ix;
1605 PL_dowarn = G_WARN_OFF;
1610 parse_body(env,xsinit);
1612 call_list(oldscope, PL_checkav);
1619 /* my_exit() was called */
1620 while (PL_scopestack_ix > oldscope)
1623 PL_curstash = PL_defstash;
1625 call_list(oldscope, PL_checkav);
1629 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1638 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1641 int argc = PL_origargc;
1642 char **argv = PL_origargv;
1643 const char *scriptname = NULL;
1644 VOL bool dosearch = FALSE;
1645 const char *validarg = "";
1648 const char *cddir = NULL;
1649 #ifdef USE_SITECUSTOMIZE
1650 bool minus_f = FALSE;
1653 sv_setpvn(PL_linestr,"",0);
1654 sv = newSVpvs(""); /* first used for -I flags */
1658 for (argc--,argv++; argc > 0; argc--,argv++) {
1659 if (argv[0][0] != '-' || !argv[0][1])
1663 validarg = " PHOOEY ";
1667 * Can we rely on the kernel to start scripts with argv[1] set to
1668 * contain all #! line switches (the whole line)? (argv[0] is set to
1669 * the interpreter name, argv[2] to the script name; argv[3] and
1670 * above may contain other arguments.)
1677 #ifndef PERL_STRICT_CR
1702 if ((s = moreswitches(s)))
1707 CHECK_MALLOC_TOO_LATE_FOR('t');
1708 if( !PL_tainting ) {
1709 PL_taint_warn = TRUE;
1715 CHECK_MALLOC_TOO_LATE_FOR('T');
1717 PL_taint_warn = FALSE;
1725 #ifdef MACOS_TRADITIONAL
1726 /* ignore -e for Dev:Pseudo argument */
1727 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1730 forbid_setid('e', -1);
1732 PL_e_script = newSVpvs("");
1733 filter_add(read_e_script, NULL);
1736 sv_catpv(PL_e_script, s);
1738 sv_catpv(PL_e_script, argv[1]);
1742 Perl_croak(aTHX_ "No code specified for -%c", *s);
1743 sv_catpvs(PL_e_script, "\n");
1747 #ifdef USE_SITECUSTOMIZE
1753 case 'I': /* -I handled both here and in moreswitches() */
1754 forbid_setid('I', -1);
1755 if (!*++s && (s=argv[1]) != NULL) {
1759 STRLEN len = strlen(s);
1760 const char * const p = savepvn(s, len);
1761 incpush(p, TRUE, TRUE, FALSE, FALSE);
1762 sv_catpvs(sv, "-I");
1763 sv_catpvn(sv, p, len);
1768 Perl_croak(aTHX_ "No directory specified for -I");
1771 forbid_setid('P', -1);
1772 PL_preprocess = TRUE;
1776 forbid_setid('S', -1);
1785 PL_preambleav = newAV();
1786 av_push(PL_preambleav,
1787 newSVpvs("use Config;"));
1791 opts_prog = newSVpvs("print Config::myconfig(),");
1793 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1795 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1797 opts = SvCUR(opts_prog);
1799 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1803 # ifdef DEBUG_LEAKING_SCALARS
1804 " DEBUG_LEAKING_SCALARS"
1806 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1807 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1809 # ifdef FAKE_THREADS
1812 # ifdef MULTIPLICITY
1821 # ifdef PERL_DONT_CREATE_GVSV
1822 " PERL_DONT_CREATE_GVSV"
1824 # ifdef PERL_GLOBAL_STRUCT
1825 " PERL_GLOBAL_STRUCT"
1827 # ifdef PERL_IMPLICIT_CONTEXT
1828 " PERL_IMPLICIT_CONTEXT"
1830 # ifdef PERL_IMPLICIT_SYS
1831 " PERL_IMPLICIT_SYS"
1836 # ifdef PERL_MALLOC_WRAP
1839 # ifdef PERL_NEED_APPCTX
1842 # ifdef PERL_NEED_TIMESBASE
1843 " PERL_NEED_TIMESBASE"
1845 # ifdef PERL_OLD_COPY_ON_WRITE
1846 " PERL_OLD_COPY_ON_WRITE"
1848 # ifdef PERL_TRACK_MEMPOOL
1849 " PERL_TRACK_MEMPOOL"
1851 # ifdef PERL_USE_SAFE_PUTENV
1852 " PERL_USE_SAFE_PUTENV"
1854 #ifdef PERL_USES_PL_PIDSTATUS
1855 " PERL_USES_PL_PIDSTATUS"
1857 # ifdef PL_OP_SLAB_ALLOC
1860 # ifdef THREADS_HAVE_PIDS
1861 " THREADS_HAVE_PIDS"
1863 # ifdef USE_64_BIT_ALL
1866 # ifdef USE_64_BIT_INT
1869 # ifdef USE_ITHREADS
1872 # ifdef USE_LARGE_FILES
1875 # ifdef USE_LONG_DOUBLE
1881 # ifdef USE_REENTRANT_API
1882 " USE_REENTRANT_API"
1887 # ifdef USE_SITECUSTOMIZE
1888 " USE_SITECUSTOMIZE"
1895 while (SvCUR(opts_prog) > opts+76) {
1896 /* find last space after "options: " and before col 76
1900 char * const pv = SvPV_nolen(opts_prog);
1901 const char c = pv[opts+76];
1903 space = strrchr(pv+opts+26, ' ');
1905 if (!space) break; /* "Can't happen" */
1907 /* break the line before that space */
1910 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1911 STR_WITH_LEN("\\n "));
1914 sv_catpvs(opts_prog,"\\n\",");
1916 #if defined(LOCAL_PATCH_COUNT)
1917 if (LOCAL_PATCH_COUNT > 0) {
1919 sv_catpvs(opts_prog,
1920 "\" Locally applied patches:\\n\",");
1921 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1922 if (PL_localpatches[i])
1923 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1924 0, PL_localpatches[i], 0);
1928 Perl_sv_catpvf(aTHX_ opts_prog,
1929 "\" Built under %s\\n\"",OSNAME);
1932 Perl_sv_catpvf(aTHX_ opts_prog,
1933 ",\" Compiled at %s %s\\n\"",__DATE__,
1936 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1940 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1941 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1942 "sort grep {/^PERL/} keys %ENV; ");
1944 sv_catpvs(opts_prog,
1945 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1947 sv_catpvs(opts_prog,
1948 "print \" \\%ENV:\\n @env\\n\" if @env;"
1949 "print \" \\@INC:\\n @INC\\n\";");
1953 opts_prog = Perl_newSVpvf(aTHX_
1954 "Config::config_vars(qw%c%s%c)",
1958 av_push(PL_preambleav, opts_prog);
1959 /* don't look for script or read stdin */
1960 scriptname = BIT_BUCKET;
1964 PL_doextract = TRUE;
1972 if (!*++s || isSPACE(*s)) {
1976 /* catch use of gnu style long options */
1977 if (strEQ(s, "version")) {
1981 if (strEQ(s, "help")) {
1988 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1994 #ifndef SECURE_INTERNAL_GETENV
1997 (s = PerlEnv_getenv("PERL5OPT")))
1999 const char *popt = s;
2002 if (*s == '-' && *(s+1) == 'T') {
2003 CHECK_MALLOC_TOO_LATE_FOR('T');
2005 PL_taint_warn = FALSE;
2008 char *popt_copy = NULL;
2021 if (!strchr("CDIMUdmtwA", *s))
2022 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2026 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2027 s = popt_copy + (s - popt);
2028 d = popt_copy + (d - popt);
2035 if( !PL_tainting ) {
2036 PL_taint_warn = TRUE;
2046 #ifdef USE_SITECUSTOMIZE
2049 PL_preambleav = newAV();
2050 av_unshift(PL_preambleav, 1);
2051 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2055 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2056 PL_compiling.cop_warnings
2057 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
2061 scriptname = argv[0];
2064 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2066 else if (scriptname == NULL) {
2068 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2074 /* Set $^X early so that it can be used for relocatable paths in @INC */
2075 assert (!PL_tainted);
2077 S_set_caret_X(aTHX);
2084 = open_script(scriptname, dosearch, sv, &suidscript);
2086 validate_suid(validarg, scriptname, fdscript, suidscript);
2089 # if defined(SIGCHLD) || defined(SIGCLD)
2092 # define SIGCHLD SIGCLD
2094 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2095 if (sigstate == (Sighandler_t) SIG_IGN) {
2096 if (ckWARN(WARN_SIGNAL))
2097 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2098 "Can't ignore signal CHLD, forcing to default");
2099 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2106 #ifdef MACOS_TRADITIONAL
2107 || gMacPerl_AlwaysExtract
2111 /* This will croak if suidscript is >= 0, as -x cannot be used with
2113 forbid_setid('x', suidscript);
2114 /* Hence you can't get here if suidscript >= 0 */
2117 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2118 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2122 PL_main_cv = PL_compcv = (CV*)newSV(0);
2123 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2124 CvUNIQUE_on(PL_compcv);
2126 CvPADLIST(PL_compcv) = pad_new(0);
2129 boot_core_UNIVERSAL();
2130 boot_core_xsutils();
2133 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2135 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2141 # ifdef HAS_SOCKS5_INIT
2142 socks5_init(argv[0]);
2148 init_predump_symbols();
2149 /* init_postdump_symbols not currently designed to be called */
2150 /* more than once (ENV isn't cleared first, for example) */
2151 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2153 init_postdump_symbols(argc,argv,env);
2155 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2156 * or explicitly in some platforms.
2157 * locale.c:Perl_init_i18nl10n() if the environment
2158 * look like the user wants to use UTF-8. */
2159 #if defined(__SYMBIAN32__)
2160 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2163 /* Requires init_predump_symbols(). */
2164 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2169 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2170 * and the default open disciplines. */
2171 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2172 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2174 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2175 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2176 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2178 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2179 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2180 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2182 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2183 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2184 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2186 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2187 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2190 sv_setpvn(sv, ":utf8\0:utf8", 11);
2192 sv_setpvn(sv, ":utf8\0", 6);
2195 sv_setpvn(sv, "\0:utf8", 6);
2201 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2202 if (strEQ(s, "unsafe"))
2203 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2204 else if (strEQ(s, "safe"))
2205 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2207 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2211 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2215 PL_xmlfp = PerlIO_stdout();
2217 PL_xmlfp = PerlIO_open(s, "w");
2219 Perl_croak(aTHX_ "Can't open %s", s);
2221 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2223 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2224 PL_madskills = atoi(s);
2225 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2231 /* now parse the script */
2233 SETERRNO(0,SS_NORMAL);
2235 #ifdef MACOS_TRADITIONAL
2236 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2238 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2240 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2241 MacPerl_MPWFileName(PL_origfilename));
2245 if (yyparse() || PL_error_count) {
2247 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2249 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2254 CopLINE_set(PL_curcop, 0);
2255 PL_curstash = PL_defstash;
2256 PL_preprocess = FALSE;
2258 SvREFCNT_dec(PL_e_script);
2266 SAVECOPFILE(PL_curcop);
2267 SAVECOPLINE(PL_curcop);
2268 gv_check(PL_defstash);
2275 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2276 dump_mstats("after compilation:");
2285 =for apidoc perl_run
2287 Tells a Perl interpreter to run. See L<perlembed>.
2300 PERL_UNUSED_CONTEXT;
2302 oldscope = PL_scopestack_ix;
2310 cxstack_ix = -1; /* start context stack again */
2312 case 0: /* normal completion */
2316 case 2: /* my_exit() */
2317 while (PL_scopestack_ix > oldscope)
2320 PL_curstash = PL_defstash;
2321 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2322 PL_endav && !PL_minus_c)
2323 call_list(oldscope, PL_endav);
2325 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2326 dump_mstats("after execution: ");
2332 POPSTACK_TO(PL_mainstack);
2335 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2347 S_run_body(pTHX_ I32 oldscope)
2350 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2351 PL_sawampersand ? "Enabling" : "Omitting"));
2353 if (!PL_restartop) {
2357 exit(0); /* less likely to core dump than my_exit(0) */
2360 DEBUG_x(dump_all());
2363 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2365 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2369 #ifdef MACOS_TRADITIONAL
2370 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2371 (gMacPerl_ErrorFormat ? "# " : ""),
2372 MacPerl_MPWFileName(PL_origfilename));
2374 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2378 if (PERLDB_SINGLE && PL_DBsingle)
2379 sv_setiv(PL_DBsingle, 1);
2381 call_list(oldscope, PL_initav);
2387 PL_op = PL_restartop;
2391 else if (PL_main_start) {
2392 CvDEPTH(PL_main_cv) = 1;
2393 PL_op = PL_main_start;
2401 =head1 SV Manipulation Functions
2403 =for apidoc p||get_sv
2405 Returns the SV of the specified Perl scalar. If C<create> is set and the
2406 Perl variable does not exist then it will be created. If C<create> is not
2407 set and the variable does not exist then NULL is returned.
2413 Perl_get_sv(pTHX_ const char *name, I32 create)
2416 gv = gv_fetchpv(name, create, SVt_PV);
2423 =head1 Array Manipulation Functions
2425 =for apidoc p||get_av
2427 Returns the AV of the specified Perl array. If C<create> is set and the
2428 Perl variable does not exist then it will be created. If C<create> is not
2429 set and the variable does not exist then NULL is returned.
2435 Perl_get_av(pTHX_ const char *name, I32 create)
2437 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2446 =head1 Hash Manipulation Functions
2448 =for apidoc p||get_hv
2450 Returns the HV of the specified Perl hash. If C<create> is set and the
2451 Perl variable does not exist then it will be created. If C<create> is not
2452 set and the variable does not exist then NULL is returned.
2458 Perl_get_hv(pTHX_ const char *name, I32 create)
2460 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2469 =head1 CV Manipulation Functions
2471 =for apidoc p||get_cv
2473 Returns the CV of the specified Perl subroutine. If C<create> is set and
2474 the Perl subroutine does not exist then it will be declared (which has the
2475 same effect as saying C<sub name;>). If C<create> is not set and the
2476 subroutine does not exist then NULL is returned.
2482 Perl_get_cv(pTHX_ const char *name, I32 create)
2484 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2485 /* XXX unsafe for threads if eval_owner isn't held */
2486 /* XXX this is probably not what they think they're getting.
2487 * It has the same effect as "sub name;", i.e. just a forward
2489 if (create && !GvCVu(gv))
2490 return newSUB(start_subparse(FALSE, 0),
2491 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2498 /* Be sure to refetch the stack pointer after calling these routines. */
2502 =head1 Callback Functions
2504 =for apidoc p||call_argv
2506 Performs a callback to the specified Perl sub. See L<perlcall>.
2512 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2514 /* See G_* flags in cop.h */
2515 /* null terminated arg list */
2523 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2528 return call_pv(sub_name, flags);
2532 =for apidoc p||call_pv
2534 Performs a callback to the specified Perl sub. See L<perlcall>.
2540 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2541 /* name of the subroutine */
2542 /* See G_* flags in cop.h */
2544 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2548 =for apidoc p||call_method
2550 Performs a callback to the specified Perl method. The blessed object must
2551 be on the stack. See L<perlcall>.
2557 Perl_call_method(pTHX_ const char *methname, I32 flags)
2558 /* name of the subroutine */
2559 /* See G_* flags in cop.h */
2561 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2564 /* May be called with any of a CV, a GV, or an SV containing the name. */
2566 =for apidoc p||call_sv
2568 Performs a callback to the Perl sub whose name is in the SV. See
2575 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2576 /* See G_* flags in cop.h */
2579 LOGOP myop; /* fake syntax tree node */
2582 volatile I32 retval = 0;
2584 bool oldcatch = CATCH_GET;
2586 OP* const oldop = PL_op;
2589 if (flags & G_DISCARD) {
2594 Zero(&myop, 1, LOGOP);
2595 myop.op_next = NULL;
2596 if (!(flags & G_NOARGS))
2597 myop.op_flags |= OPf_STACKED;
2598 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2599 (flags & G_ARRAY) ? OPf_WANT_LIST :
2604 EXTEND(PL_stack_sp, 1);
2605 *++PL_stack_sp = sv;
2607 oldscope = PL_scopestack_ix;
2609 if (PERLDB_SUB && PL_curstash != PL_debstash
2610 /* Handle first BEGIN of -d. */
2611 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2612 /* Try harder, since this may have been a sighandler, thus
2613 * curstash may be meaningless. */
2614 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2615 && !(flags & G_NODEBUG))
2616 PL_op->op_private |= OPpENTERSUB_DB;
2618 if (flags & G_METHOD) {
2619 Zero(&method_op, 1, UNOP);
2620 method_op.op_next = PL_op;
2621 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2622 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2623 PL_op = (OP*)&method_op;
2626 if (!(flags & G_EVAL)) {
2628 CALL_BODY_SUB((OP*)&myop);
2629 retval = PL_stack_sp - (PL_stack_base + oldmark);
2630 CATCH_SET(oldcatch);
2633 myop.op_other = (OP*)&myop;
2635 create_eval_scope(flags|G_FAKINGEVAL);
2643 CALL_BODY_SUB((OP*)&myop);
2644 retval = PL_stack_sp - (PL_stack_base + oldmark);
2645 if (!(flags & G_KEEPERR))
2646 sv_setpvn(ERRSV,"",0);
2652 /* my_exit() was called */
2653 PL_curstash = PL_defstash;
2656 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2657 Perl_croak(aTHX_ "Callback called exit");
2662 PL_op = PL_restartop;
2666 PL_stack_sp = PL_stack_base + oldmark;
2667 if (flags & G_ARRAY)
2671 *++PL_stack_sp = &PL_sv_undef;
2676 if (PL_scopestack_ix > oldscope)
2677 delete_eval_scope();
2681 if (flags & G_DISCARD) {
2682 PL_stack_sp = PL_stack_base + oldmark;
2691 /* Eval a string. The G_EVAL flag is always assumed. */
2694 =for apidoc p||eval_sv
2696 Tells Perl to C<eval> the string in the SV.
2702 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2704 /* See G_* flags in cop.h */
2708 UNOP myop; /* fake syntax tree node */
2709 volatile I32 oldmark = SP - PL_stack_base;
2710 volatile I32 retval = 0;
2712 OP* const oldop = PL_op;
2715 if (flags & G_DISCARD) {
2722 Zero(PL_op, 1, UNOP);
2723 EXTEND(PL_stack_sp, 1);
2724 *++PL_stack_sp = sv;
2726 if (!(flags & G_NOARGS))
2727 myop.op_flags = OPf_STACKED;
2728 myop.op_next = NULL;
2729 myop.op_type = OP_ENTEREVAL;
2730 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2731 (flags & G_ARRAY) ? OPf_WANT_LIST :
2733 if (flags & G_KEEPERR)
2734 myop.op_flags |= OPf_SPECIAL;
2736 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2737 * before a PUSHEVAL, which corrupts the stack after a croak */
2738 TAINT_PROPER("eval_sv()");
2744 CALL_BODY_EVAL((OP*)&myop);
2745 retval = PL_stack_sp - (PL_stack_base + oldmark);
2746 if (!(flags & G_KEEPERR))
2747 sv_setpvn(ERRSV,"",0);
2753 /* my_exit() was called */
2754 PL_curstash = PL_defstash;
2757 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2758 Perl_croak(aTHX_ "Callback called exit");
2763 PL_op = PL_restartop;
2767 PL_stack_sp = PL_stack_base + oldmark;
2768 if (flags & G_ARRAY)
2772 *++PL_stack_sp = &PL_sv_undef;
2778 if (flags & G_DISCARD) {
2779 PL_stack_sp = PL_stack_base + oldmark;
2789 =for apidoc p||eval_pv
2791 Tells Perl to C<eval> the given string and return an SV* result.
2797 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2801 SV* sv = newSVpv(p, 0);
2803 eval_sv(sv, G_SCALAR);
2810 if (croak_on_error && SvTRUE(ERRSV)) {
2811 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2817 /* Require a module. */
2820 =head1 Embedding Functions
2822 =for apidoc p||require_pv
2824 Tells Perl to C<require> the file named by the string argument. It is
2825 analogous to the Perl code C<eval "require '$file'">. It's even
2826 implemented that way; consider using load_module instead.
2831 Perl_require_pv(pTHX_ const char *pv)
2836 PUSHSTACKi(PERLSI_REQUIRE);
2838 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2839 eval_sv(sv_2mortal(sv), G_DISCARD);
2845 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2847 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2850 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2854 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2856 /* This message really ought to be max 23 lines.
2857 * Removed -h because the user already knows that option. Others? */
2859 static const char * const usage_msg[] = {
2860 "-0[octal] specify record separator (\\0, if no argument)",
2861 "-A[mod][=pattern] activate all/given assertions",
2862 "-a autosplit mode with -n or -p (splits $_ into @F)",
2863 "-C[number/list] enables the listed Unicode features",
2864 "-c check syntax only (runs BEGIN and CHECK blocks)",
2865 "-d[:debugger] run program under debugger",
2866 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2867 "-e program one line of program (several -e's allowed, omit programfile)",
2868 "-E program like -e, but enables all optional features",
2869 "-f don't do $sitelib/sitecustomize.pl at startup",
2870 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2871 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2872 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2873 "-l[octal] enable line ending processing, specifies line terminator",
2874 "-[mM][-]module execute \"use/no module...\" before executing program",
2875 "-n assume \"while (<>) { ... }\" loop around program",
2876 "-p assume loop like -n but print line also, like sed",
2877 "-P run program through C preprocessor before compilation",
2878 "-s enable rudimentary parsing for switches after programfile",
2879 "-S look for programfile using PATH environment variable",
2880 "-t enable tainting warnings",
2881 "-T enable tainting checks",
2882 "-u dump core after parsing program",
2883 "-U allow unsafe operations",
2884 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2885 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2886 "-w enable many useful warnings (RECOMMENDED)",
2887 "-W enable all warnings",
2888 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2889 "-X disable all warnings",
2893 const char * const *p = usage_msg;
2895 PerlIO_printf(PerlIO_stdout(),
2896 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2899 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2902 /* convert a string of -D options (or digits) into an int.
2903 * sets *s to point to the char after the options */
2907 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2909 static const char * const usage_msgd[] = {
2910 " Debugging flag values: (see also -d)",
2911 " p Tokenizing and parsing (with v, displays parse stack)",
2912 " s Stack snapshots (with v, displays all stacks)",
2913 " l Context (loop) stack processing",
2914 " t Trace execution",
2915 " o Method and overloading resolution",
2916 " c String/numeric conversions",
2917 " P Print profiling info, preprocessor command for -P, source file input state",
2918 " m Memory allocation",
2919 " f Format processing",
2920 " r Regular expression parsing and execution",
2921 " x Syntax tree dump",
2922 " u Tainting checks",
2923 " H Hash dump -- usurps values()",
2924 " X Scratchpad allocation",
2926 " S Thread synchronization",
2928 " R Include reference counts of dumped variables (eg when using -Ds)",
2929 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2930 " v Verbose: use in conjunction with other flags",
2932 " A Consistency checks on internal structures",
2933 " q quiet - currently only suppresses the 'EXECUTING' message",
2938 /* if adding extra options, remember to update DEBUG_MASK */
2939 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2941 for (; isALNUM(**s); (*s)++) {
2942 const char * const d = strchr(debopts,**s);
2944 i |= 1 << (d - debopts);
2945 else if (ckWARN_d(WARN_DEBUGGING))
2946 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2947 "invalid option -D%c, use -D'' to see choices\n", **s);
2950 else if (isDIGIT(**s)) {
2952 for (; isALNUM(**s); (*s)++) ;
2954 else if (givehelp) {
2955 const char *const *p = usage_msgd;
2956 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2959 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2960 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2961 "-Dp not implemented on this platform\n");
2967 /* This routine handles any switches that can be given during run */
2970 Perl_moreswitches(pTHX_ char *s)
2981 SvREFCNT_dec(PL_rs);
2982 if (s[1] == 'x' && s[2]) {
2983 const char *e = s+=2;
2989 flags = PERL_SCAN_SILENT_ILLDIGIT;
2990 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2991 if (s + numlen < e) {
2992 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2996 PL_rs = newSVpvs("");
2997 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2998 tmps = (U8*)SvPVX(PL_rs);
2999 uvchr_to_utf8(tmps, rschar);
3000 SvCUR_set(PL_rs, UNISKIP(rschar));
3005 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3006 if (rschar & ~((U8)~0))
3007 PL_rs = &PL_sv_undef;
3008 else if (!rschar && numlen >= 2)
3009 PL_rs = newSVpvs("");
3011 char ch = (char)rschar;
3012 PL_rs = newSVpvn(&ch, 1);
3015 sv_setsv(get_sv("/", TRUE), PL_rs);
3020 PL_unicode = parse_unicode_opts( (const char **)&s );
3021 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3027 while (*s && !isSPACE(*s)) ++s;
3028 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3039 forbid_setid('d', -1);
3042 /* -dt indicates to the debugger that threads will be used */
3043 if (*s == 't' && !isALNUM(s[1])) {
3045 my_setenv("PERL5DB_THREADED", "1");
3048 /* The following permits -d:Mod to accepts arguments following an =
3049 in the fashion that -MSome::Mod does. */
3050 if (*s == ':' || *s == '=') {
3052 SV * const sv = newSVpvs("use Devel::");
3054 /* We now allow -d:Module=Foo,Bar */
3055 while(isALNUM(*s) || *s==':') ++s;
3057 sv_catpv(sv, start);
3059 sv_catpvn(sv, start, s-start);
3060 /* Don't use NUL as q// delimiter here, this string goes in the
3062 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3065 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3068 PL_perldb = PERLDB_ALL;
3075 forbid_setid('D', -1);
3077 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3078 #else /* !DEBUGGING */
3079 if (ckWARN_d(WARN_DEBUGGING))
3080 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3081 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3082 for (s++; isALNUM(*s); s++) ;
3087 usage(PL_origargv[0]);
3090 Safefree(PL_inplace);
3091 #if defined(__CYGWIN__) /* do backup extension automagically */
3092 if (*(s+1) == '\0') {
3093 PL_inplace = savepvs(".bak");
3096 #endif /* __CYGWIN__ */
3098 const char * const start = ++s;
3099 while (*s && !isSPACE(*s))
3102 PL_inplace = savepvn(start, s - start);
3106 if (*s == '-') /* Additional switches on #! line. */
3110 case 'I': /* -I handled both here and in parse_body() */
3111 forbid_setid('I', -1);
3113 while (*s && isSPACE(*s))
3118 /* ignore trailing spaces (possibly followed by other switches) */
3120 for (e = p; *e && !isSPACE(*e); e++) ;
3124 } while (*p && *p != '-');
3125 e = savepvn(s, e-s);
3126 incpush(e, TRUE, TRUE, FALSE, FALSE);
3133 Perl_croak(aTHX_ "No directory specified for -I");
3139 SvREFCNT_dec(PL_ors_sv);
3145 PL_ors_sv = newSVpvs("\n");
3146 numlen = 3 + (*s == '0');
3147 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3151 if (RsPARA(PL_rs)) {
3152 PL_ors_sv = newSVpvs("\n\n");
3155 PL_ors_sv = newSVsv(PL_rs);
3160 forbid_setid('A', -1);
3162 PL_preambleav = newAV();
3165 char * const start = s;
3166 SV * const sv = newSVpvs("use assertions::activate");
3167 while(isALNUM(*s) || *s == ':') ++s;
3169 sv_catpvs(sv, "::");
3170 sv_catpvn(sv, start, s-start);
3173 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3176 else if (*s != '\0') {
3177 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3179 av_push(PL_preambleav, sv);
3183 forbid_setid('M', -1); /* XXX ? */
3186 forbid_setid('m', -1); /* XXX ? */
3190 const char *use = "use ";
3191 /* -M-foo == 'no foo' */
3192 /* Leading space on " no " is deliberate, to make both
3193 possibilities the same length. */
3194 if (*s == '-') { use = " no "; ++s; }
3195 sv = newSVpvn(use,4);
3197 /* We allow -M'Module qw(Foo Bar)' */
3198 while(isALNUM(*s) || *s==':') ++s;
3200 sv_catpv(sv, start);
3201 if (*(start-1) == 'm') {
3203 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3204 sv_catpvs( sv, " ()");
3208 Perl_croak(aTHX_ "Module name required with -%c option",
3210 sv_catpvn(sv, start, s-start);
3211 sv_catpvs(sv, " split(/,/,q");
3212 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3214 sv_catpvs(sv, "\0)");
3218 PL_preambleav = newAV();
3219 av_push(PL_preambleav, sv);
3222 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3233 forbid_setid('s', -1);
3234 PL_doswitches = TRUE;
3248 #ifdef MACOS_TRADITIONAL
3249 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3251 PL_do_undump = TRUE;
3259 if (!sv_derived_from(PL_patchlevel, "version"))
3260 upg_version(PL_patchlevel);
3262 PerlIO_printf(PerlIO_stdout(),
3263 Perl_form(aTHX_ "\nThis is perl, %"SVf
3264 #ifdef PERL_PATCHNUM
3265 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3268 (void*)vstringify(PL_patchlevel),
3271 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3272 PerlIO_printf(PerlIO_stdout(),
3273 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3274 vstringify(PL_patchlevel)));
3275 PerlIO_printf(PerlIO_stdout(),
3276 Perl_form(aTHX_ " built under %s at %s %s\n",
3277 OSNAME, __DATE__, __TIME__));
3278 PerlIO_printf(PerlIO_stdout(),
3279 Perl_form(aTHX_ " OS Specific Release: %s\n",
3283 #if defined(LOCAL_PATCH_COUNT)
3284 if (LOCAL_PATCH_COUNT > 0)
3285 PerlIO_printf(PerlIO_stdout(),
3286 "\n(with %d registered patch%s, "
3287 "see perl -V for more detail)",
3289 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "\n\nCopyright 1987-2006, Larry Wall\n");
3294 #ifdef MACOS_TRADITIONAL
3295 PerlIO_printf(PerlIO_stdout(),
3296 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3297 "maintained by Chris Nandor\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3306 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3311 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "atariST series port, ++jrb bammi@cadence.com\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3326 PerlIO_printf(PerlIO_stdout(),
3327 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3330 PerlIO_printf(PerlIO_stdout(),
3331 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3334 PerlIO_printf(PerlIO_stdout(),
3335 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "MiNT port by Guido Flohr, 1997-1999\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "EPOC port by Olaf Flebbe, 1999-2002\n");
3350 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3351 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3354 #ifdef __SYMBIAN32__
3355 PerlIO_printf(PerlIO_stdout(),
3356 "Symbian port by Nokia, 2004-2005\n");
3358 #ifdef BINARY_BUILD_NOTICE
3359 BINARY_BUILD_NOTICE;
3361 PerlIO_printf(PerlIO_stdout(),
3363 Perl may be copied only under the terms of either the Artistic License or the\n\
3364 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3365 Complete documentation for Perl, including FAQ lists, should be found on\n\
3366 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3367 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3370 if (! (PL_dowarn & G_WARN_ALL_MASK))
3371 PL_dowarn |= G_WARN_ON;
3375 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3376 if (!specialWARN(PL_compiling.cop_warnings))
3377 PerlMemShared_free(PL_compiling.cop_warnings);
3378 PL_compiling.cop_warnings = pWARN_ALL ;
3382 PL_dowarn = G_WARN_ALL_OFF;
3383 if (!specialWARN(PL_compiling.cop_warnings))
3384 PerlMemShared_free(PL_compiling.cop_warnings);
3385 PL_compiling.cop_warnings = pWARN_NONE ;
3390 if (s[1] == '-') /* Additional switches on #! line. */
3395 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3401 #ifdef ALTERNATE_SHEBANG
3402 case 'S': /* OS/2 needs -S on "extproc" line. */
3410 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3415 /* compliments of Tom Christiansen */
3417 /* unexec() can be found in the Gnu emacs distribution */
3418 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3421 Perl_my_unexec(pTHX)
3423 PERL_UNUSED_CONTEXT;
3425 SV * prog = newSVpv(BIN_EXP, 0);
3426 SV * file = newSVpv(PL_origfilename, 0);
3430 sv_catpvs(prog, "/perl");
3431 sv_catpvs(file, ".perldump");
3433 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3434 /* unexec prints msg to stderr in case of failure */
3435 PerlProc_exit(status);
3438 # include <lib$routines.h>
3439 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3440 # elif defined(WIN32) || defined(__CYGWIN__)
3441 Perl_croak(aTHX_ "dump is not supported");
3443 ABORT(); /* for use with undump */
3448 /* initialize curinterp */
3454 # define PERLVAR(var,type)
3455 # define PERLVARA(var,n,type)
3456 # if defined(PERL_IMPLICIT_CONTEXT)
3457 # define PERLVARI(var,type,init) aTHX->var = init;
3458 # define PERLVARIC(var,type,init) aTHX->var = init;
3460 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3461 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3463 # include "intrpvar.h"
3464 # include "thrdvar.h"
3470 # define PERLVAR(var,type)
3471 # define PERLVARA(var,n,type)
3472 # define PERLVARI(var,type,init) PL_##var = init;
3473 # define PERLVARIC(var,type,init) PL_##var = init;
3474 # include "intrpvar.h"
3475 # include "thrdvar.h"
3482 /* As these are inside a structure, PERLVARI isn't capable of initialising
3485 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3486 PL_reg_poscache = PL_reg_starttry = NULL;
3490 S_init_main_stash(pTHX)
3495 PL_curstash = PL_defstash = newHV();
3496 /* We know that the string "main" will be in the global shared string
3497 table, so it's a small saving to use it rather than allocate another
3499 PL_curstname = newSVpvs_share("main");
3500 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3501 /* If we hadn't caused another reference to "main" to be in the shared
3502 string table above, then it would be worth reordering these two,
3503 because otherwise all we do is delete "main" from it as a consequence
3504 of the SvREFCNT_dec, only to add it again with hv_name_set */
3505 SvREFCNT_dec(GvHV(gv));
3506 hv_name_set(PL_defstash, "main", 4, 0);
3507 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3509 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3511 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3512 GvMULTI_on(PL_incgv);
3513 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3514 GvMULTI_on(PL_hintgv);
3515 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3516 SvREFCNT_inc_simple(PL_defgv);
3517 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3518 SvREFCNT_inc_simple(PL_errgv);
3519 GvMULTI_on(PL_errgv);
3520 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3521 GvMULTI_on(PL_replgv);
3522 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3523 #ifdef PERL_DONT_CREATE_GVSV
3526 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3527 sv_setpvn(ERRSV, "", 0);
3528 PL_curstash = PL_defstash;
3529 CopSTASH_set(&PL_compiling, PL_defstash);
3530 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3531 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3533 /* We must init $/ before switches are processed. */
3534 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3538 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3544 const char *cpp_discard_flag;
3553 PL_origfilename = savepvs("-e");
3556 /* if find_script() returns, it returns a malloc()-ed value */
3557 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3559 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3560 const char *s = scriptname + 8;
3566 * Tell apart "normal" usage of fdscript, e.g.
3567 * with bash on FreeBSD:
3568 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3569 * from usage in suidperl.
3570 * Does any "normal" usage leave garbage after the number???
3571 * Is it a mistake to use a similar /dev/fd/ construct for
3576 * Be supersafe and do some sanity-checks.
3577 * Still, can we be sure we got the right thing?
3580 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3583 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3585 scriptname = savepv(s + 1);
3586 Safefree(PL_origfilename);
3587 PL_origfilename = (char *)scriptname;
3592 CopFILE_free(PL_curcop);
3593 CopFILE_set(PL_curcop, PL_origfilename);
3594 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3595 scriptname = (char *)"";
3596 if (fdscript >= 0) {
3597 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3598 # if defined(HAS_FCNTL) && defined(F_SETFD)
3600 /* ensure close-on-exec */
3601 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3606 Perl_croak(aTHX_ "sperl needs fd script\n"
3607 "You should not call sperl directly; do you need to "
3608 "change a #! line\nfrom sperl to perl?\n");
3611 * Do not open (or do other fancy stuff) while setuid.
3612 * Perl does the open, and hands script to suidperl on a fd;
3613 * suidperl only does some checks, sets up UIDs and re-execs
3614 * perl with that fd as it has always done.
3617 if (*suidscript != 1) {
3618 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3621 else if (PL_preprocess) {
3622 const char * const cpp_cfg = CPPSTDIN;
3623 SV * const cpp = newSVpvs("");
3624 SV * const cmd = newSV(0);
3626 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3627 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3628 if (strEQ(cpp_cfg, "cppstdin"))
3629 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3630 sv_catpv(cpp, cpp_cfg);
3633 sv_catpvs(sv, "-I");
3634 sv_catpv(sv,PRIVLIB_EXP);
3637 DEBUG_P(PerlIO_printf(Perl_debug_log,
3638 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3639 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3642 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3649 cpp_discard_flag = "";
3651 cpp_discard_flag = "-C";
3655 perl = os2_execname(aTHX);
3657 perl = PL_origargv[0];
3661 /* This strips off Perl comments which might interfere with
3662 the C pre-processor, including #!. #line directives are
3663 deliberately stripped to avoid confusion with Perl's version
3664 of #line. FWP played some golf with it so it will fit
3665 into VMS's 255 character buffer.
3668 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3670 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3672 Perl_sv_setpvf(aTHX_ cmd, "\
3673 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3674 perl, quote, code, quote, scriptname, (void*)cpp,
3675 cpp_discard_flag, (void*)sv, CPPMINUS);
3677 PL_doextract = FALSE;
3679 DEBUG_P(PerlIO_printf(Perl_debug_log,
3680 "PL_preprocess: cmd=\"%s\"\n",
3683 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3687 else if (!*scriptname) {
3688 forbid_setid(0, *suidscript);
3689 PL_rsfp = PerlIO_stdin();
3692 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3693 # if defined(HAS_FCNTL) && defined(F_SETFD)
3695 /* ensure close-on-exec */
3696 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3699 #endif /* IAMSUID */
3701 /* PSz 16 Sep 03 Keep neat error message */
3703 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3705 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3706 CopFILE(PL_curcop), Strerror(errno));
3712 * I_SYSSTATVFS HAS_FSTATVFS
3714 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3715 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3716 * here so that metaconfig picks them up. */
3720 S_fd_on_nosuid_fs(pTHX_ int fd)
3723 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3724 * but is needed also on machines without setreuid.
3725 * Seems safe enough to run as root.
3727 int check_okay = 0; /* able to do all the required sys/libcalls */
3728 int on_nosuid = 0; /* the fd is on a nosuid fs */
3730 * Need to check noexec also: nosuid might not be set, the average
3731 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3733 int on_noexec = 0; /* the fd is on a noexec fs */
3736 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3737 * fstatvfs() is UNIX98.
3738 * fstatfs() is 4.3 BSD.
3739 * ustat()+getmnt() is pre-4.3 BSD.
3740 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3741 * an irrelevant filesystem while trying to reach the right one.
3744 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3746 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3747 defined(HAS_FSTATVFS)
3748 # define FD_ON_NOSUID_CHECK_OKAY
3749 struct statvfs stfs;
3751 check_okay = fstatvfs(fd, &stfs) == 0;
3752 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3754 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3755 on platforms where it is present. */
3756 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3758 # endif /* fstatvfs */
3760 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3761 defined(PERL_MOUNT_NOSUID) && \
3762 defined(PERL_MOUNT_NOEXEC) && \
3763 defined(HAS_FSTATFS) && \
3764 defined(HAS_STRUCT_STATFS) && \
3765 defined(HAS_STRUCT_STATFS_F_FLAGS)
3766 # define FD_ON_NOSUID_CHECK_OKAY
3769 check_okay = fstatfs(fd, &stfs) == 0;
3770 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3771 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3772 # endif /* fstatfs */
3774 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3775 defined(PERL_MOUNT_NOSUID) && \
3776 defined(PERL_MOUNT_NOEXEC) && \
3777 defined(HAS_FSTAT) && \
3778 defined(HAS_USTAT) && \
3779 defined(HAS_GETMNT) && \
3780 defined(HAS_STRUCT_FS_DATA) && \
3782 # define FD_ON_NOSUID_CHECK_OKAY
3785 if (fstat(fd, &fdst) == 0) {
3787 if (ustat(fdst.st_dev, &us) == 0) {
3789 /* NOSTAT_ONE here because we're not examining fields which
3790 * vary between that case and STAT_ONE. */
3791 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3792 size_t cmplen = sizeof(us.f_fname);
3793 if (sizeof(fsd.fd_req.path) < cmplen)
3794 cmplen = sizeof(fsd.fd_req.path);
3795 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3796 fdst.st_dev == fsd.fd_req.dev) {
3798 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3799 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3804 # endif /* fstat+ustat+getmnt */
3806 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3807 defined(HAS_GETMNTENT) && \
3808 defined(HAS_HASMNTOPT) && \
3809 defined(MNTOPT_NOSUID) && \
3810 defined(MNTOPT_NOEXEC)
3811 # define FD_ON_NOSUID_CHECK_OKAY
3812 FILE *mtab = fopen("/etc/mtab", "r");
3813 struct mntent *entry;
3816 if (mtab && (fstat(fd, &stb) == 0)) {
3817 while (entry = getmntent(mtab)) {
3818 if (stat(entry->mnt_dir, &fsb) == 0
3819 && fsb.st_dev == stb.st_dev)
3821 /* found the filesystem */
3823 if (hasmntopt(entry, MNTOPT_NOSUID))
3825 if (hasmntopt(entry, MNTOPT_NOEXEC))
3828 } /* A single fs may well fail its stat(). */
3833 # endif /* getmntent+hasmntopt */
3836 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3838 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3840 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3841 return ((!check_okay) || on_nosuid || on_noexec);
3843 #endif /* IAMSUID */
3846 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3847 int fdscript, int suidscript)
3852 #endif /* IAMSUID */
3854 /* do we need to emulate setuid on scripts? */
3856 /* This code is for those BSD systems that have setuid #! scripts disabled
3857 * in the kernel because of a security problem. Merely defining DOSUID
3858 * in perl will not fix that problem, but if you have disabled setuid
3859 * scripts in the kernel, this will attempt to emulate setuid and setgid
3860 * on scripts that have those now-otherwise-useless bits set. The setuid
3861 * root version must be called suidperl or sperlN.NNN. If regular perl
3862 * discovers that it has opened a setuid script, it calls suidperl with
3863 * the same argv that it had. If suidperl finds that the script it has
3864 * just opened is NOT setuid root, it sets the effective uid back to the
3865 * uid. We don't just make perl setuid root because that loses the
3866 * effective uid we had before invoking perl, if it was different from the
3869 * Description/comments above do not match current workings:
3870 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3871 * suidperl called with script open and name changed to /dev/fd/N/X;
3872 * suidperl croaks if script is not setuid;
3873 * making perl setuid would be a huge security risk (and yes, that
3874 * would lose any euid we might have had).
3876 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3877 * be defined in suidperl only. suidperl must be setuid root. The
3878 * Configure script will set this up for you if you want it.
3884 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3885 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3886 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3888 const char *linestr;
3892 if (fdscript < 0 || suidscript != 1)
3893 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3895 * Since the script is opened by perl, not suidperl, some of these
3896 * checks are superfluous. Leaving them in probably does not lower
3900 * Do checks even for systems with no HAS_SETREUID.
3901 * We used to swap, then re-swap UIDs with
3903 if (setreuid(PL_euid,PL_uid) < 0
3904 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3905 Perl_croak(aTHX_ "Can't swap uid and euid");
3908 if (setreuid(PL_uid,PL_euid) < 0
3909 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3910 Perl_croak(aTHX_ "Can't reswap uid and euid");
3914 /* On this access check to make sure the directories are readable,
3915 * there is actually a small window that the user could use to make
3916 * filename point to an accessible directory. So there is a faint
3917 * chance that someone could execute a setuid script down in a
3918 * non-accessible directory. I don't know what to do about that.
3919 * But I don't think it's too important. The manual lies when
3920 * it says access() is useful in setuid programs.
3922 * So, access() is pretty useless... but not harmful... do anyway.
3924 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3925 Perl_croak(aTHX_ "Can't access() script\n");
3928 /* If we can swap euid and uid, then we can determine access rights
3929 * with a simple stat of the file, and then compare device and
3930 * inode to make sure we did stat() on the same file we opened.
3931 * Then we just have to make sure he or she can execute it.
3934 * As the script is opened by perl, not suidperl, we do not need to
3935 * care much about access rights.
3937 * The 'script changed' check is needed, or we can get lied to
3938 * about $0 with e.g.
3939 * suidperl /dev/fd/4//bin/x 4<setuidscript
3940 * Without HAS_SETREUID, is it safe to stat() as root?
3942 * Are there any operating systems that pass /dev/fd/xxx for setuid
3943 * scripts, as suggested/described in perlsec(1)? Surely they do not
3944 * pass the script name as we do, so the "script changed" test would
3945 * fail for them... but we never get here with
3946 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3948 * This is one place where we must "lie" about return status: not
3949 * say if the stat() failed. We are doing this as root, and could
3950 * be tricked into reporting existence or not of files that the
3951 * "plain" user cannot even see.
3955 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3956 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3957 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3958 Perl_croak(aTHX_ "Setuid script changed\n");
3962 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3963 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3966 * We used to do this check as the "plain" user (after swapping
3967 * UIDs). But the check for nosuid and noexec filesystem is needed,
3968 * and should be done even without HAS_SETREUID. (Maybe those
3969 * operating systems do not have such mount options anyway...)
3970 * Seems safe enough to do as root.
3972 #if !defined(NO_NOSUID_CHECK)
3973 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3974 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3977 #endif /* IAMSUID */
3979 if (!S_ISREG(PL_statbuf.st_mode)) {
3980 Perl_croak(aTHX_ "Setuid script not plain file\n");
3982 if (PL_statbuf.st_mode & S_IWOTH)
3983 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3984 PL_doswitches = FALSE; /* -s is insecure in suid */
3985 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3986 CopLINE_inc(PL_curcop);
3987 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3988 Perl_croak(aTHX_ "No #! line");
3989 linestr = SvPV_nolen_const(PL_linestr);
3990 /* required even on Sys V */
3991 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3992 Perl_croak(aTHX_ "No #! line");
3996 /* Sanity check on line length */
3997 s_end = s + strlen(s);
3998 if (s_end == s || (s_end - s) > 4000)
3999 Perl_croak(aTHX_ "Very long #! line");
4000 /* Allow more than a single space after #! */
4001 while (isSPACE(*s)) s++;
4002 /* Sanity check on buffer end */
4003 while ((*s) && !isSPACE(*s)) s++;
4004 for (s2 = s; (s2 > linestr &&
4005 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4006 || s2[-1] == '-')); s2--) ;
4007 /* Sanity check on buffer start */
4008 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4009 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4010 Perl_croak(aTHX_ "Not a perl script");
4011 while (*s == ' ' || *s == '\t') s++;
4013 * #! arg must be what we saw above. They can invoke it by
4014 * mentioning suidperl explicitly, but they may not add any strange
4015 * arguments beyond what #! says if they do invoke suidperl that way.
4018 * The way validarg was set up, we rely on the kernel to start
4019 * scripts with argv[1] set to contain all #! line switches (the
4023 * Check that we got all the arguments listed in the #! line (not
4024 * just that there are no extraneous arguments). Might not matter
4025 * much, as switches from #! line seem to be acted upon (also), and
4026 * so may be checked and trapped in perl. But, security checks must
4027 * be done in suidperl and not deferred to perl. Note that suidperl
4028 * does not get around to parsing (and checking) the switches on
4029 * the #! line (but execs perl sooner).
4030 * Allow (require) a trailing newline (which may be of two
4031 * characters on some architectures?) (but no other trailing
4034 len = strlen(validarg);
4035 if (strEQ(validarg," PHOOEY ") ||
4036 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4037 !((s_end - s) == len+1
4038 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4039 Perl_croak(aTHX_ "Args must match #! line");
4043 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4044 PL_euid == PL_statbuf.st_uid)
4046 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4047 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4048 #endif /* IAMSUID */
4051 PL_euid) { /* oops, we're not the setuid root perl */
4053 * When root runs a setuid script, we do not go through the same
4054 * steps of execing sperl and then perl with fd scripts, but
4055 * simply set up UIDs within the same perl invocation; so do
4056 * not have the same checks (on options, whatever) that we have
4057 * for plain users. No problem really: would have to be a script
4058 * that does not actually work for plain users; and if root is
4059 * foolish and can be persuaded to run such an unsafe script, he
4060 * might run also non-setuid ones, and deserves what he gets.
4062 * Or, we might drop the PL_euid check above (and rely just on
4063 * fdscript to avoid loops), and do the execs
4069 * Pass fd script to suidperl.
4070 * Exec suidperl, substituting fd script for scriptname.
4071 * Pass script name as "subdir" of fd, which perl will grok;
4072 * in fact will use that to distinguish this from "normal"
4073 * usage, see comments above.
4075 PerlIO_rewind(PL_rsfp);
4076 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4077 /* PSz 27 Feb 04 Sanity checks on scriptname */
4078 if ((!scriptname) || (!*scriptname) ) {
4079 Perl_croak(aTHX_ "No setuid script name\n");
4081 if (*scriptname == '-') {
4082 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4083 /* Or we might confuse it with an option when replacing
4084 * name in argument list, below (though we do pointer, not
4085 * string, comparisons).
4088 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4089 if (!PL_origargv[which]) {
4090 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4092 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4093 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4094 #if defined(HAS_FCNTL) && defined(F_SETFD)
4095 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4098 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4099 (int)PERL_REVISION, (int)PERL_VERSION,
4100 (int)PERL_SUBVERSION), PL_origargv);
4102 #endif /* IAMSUID */
4103 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4106 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4108 * This seems back to front: we try HAS_SETEGID first; if not available
4109 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4110 * in the sense that we only want to set EGID; but are there any machines
4111 * with either of the latter, but not the former? Same with UID, later.
4114 (void)setegid(PL_statbuf.st_gid);
4117 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4119 #ifdef HAS_SETRESGID
4120 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4122 PerlProc_setgid(PL_statbuf.st_gid);
4126 if (PerlProc_getegid() != PL_statbuf.st_gid)
4127 Perl_croak(aTHX_ "Can't do setegid!\n");
4129 if (PL_statbuf.st_mode & S_ISUID) {
4130 if (PL_statbuf.st_uid != PL_euid)
4132 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4135 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4137 #ifdef HAS_SETRESUID
4138 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4140 PerlProc_setuid(PL_statbuf.st_uid);
4144 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4145 Perl_croak(aTHX_ "Can't do seteuid!\n");
4147 else if (PL_uid) { /* oops, mustn't run as root */
4149 (void)seteuid((Uid_t)PL_uid);
4152 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4154 #ifdef HAS_SETRESUID
4155 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4157 PerlProc_setuid((Uid_t)PL_uid);
4161 if (PerlProc_geteuid() != PL_uid)
4162 Perl_croak(aTHX_ "Can't do seteuid!\n");
4165 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4166 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4169 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4170 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4171 else if (fdscript < 0 || suidscript != 1)
4172 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4173 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4175 /* PSz 16 Sep 03 Keep neat error message */
4176 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4179 /* We absolutely must clear out any saved ids here, so we */
4180 /* exec the real perl, substituting fd script for scriptname. */
4181 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4183 * It might be thought that using setresgid and/or setresuid (changed to
4184 * set the saved IDs) above might obviate the need to exec, and we could
4185 * go on to "do the perl thing".
4187 * Is there such a thing as "saved GID", and is that set for setuid (but
4188 * not setgid) execution like suidperl? Without exec, it would not be
4189 * cleared for setuid (but not setgid) scripts (or might need a dummy
4192 * We need suidperl to do the exact same argument checking that perl
4193 * does. Thus it cannot be very small; while it could be significantly
4194 * smaller, it is safer (simpler?) to make it essentially the same
4195 * binary as perl (but they are not identical). - Maybe could defer that
4196 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4197 * but prefer to do thorough checks in suidperl itself. Such deferral
4198 * would make suidperl security rely on perl, a design no-no.
4200 * Setuid things should be short and simple, thus easy to understand and
4201 * verify. They should do their "own thing", without influence by
4202 * attackers. It may help if their internal execution flow is fixed,
4203 * regardless of platform: it may be best to exec anyway.
4205 * Suidperl should at least be conceptually simple: a wrapper only,
4206 * never to do any real perl. Maybe we should put
4208 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4210 * into the perly bits.
4212 PerlIO_rewind(PL_rsfp);
4213 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4215 * Keep original arguments: suidperl already has fd script.
4217 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4218 /* if (!PL_origargv[which]) { */
4219 /* errno = EPERM; */
4220 /* Perl_croak(aTHX_ "Permission denied\n"); */
4222 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4223 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4224 #if defined(HAS_FCNTL) && defined(F_SETFD)
4225 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4228 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4229 (int)PERL_REVISION, (int)PERL_VERSION,
4230 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4232 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4233 #endif /* IAMSUID */
4235 PERL_UNUSED_ARG(fdscript);
4236 PERL_UNUSED_ARG(suidscript);
4237 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4238 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4239 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4240 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4242 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4245 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4246 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4247 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4248 /* not set-id, must be wrapped */
4251 PERL_UNUSED_ARG(validarg);
4252 PERL_UNUSED_ARG(scriptname);
4256 S_find_beginning(pTHX)
4260 register const char *s2;
4261 #ifdef MACOS_TRADITIONAL
4265 /* skip forward in input to the real script? */
4267 #ifdef MACOS_TRADITIONAL
4268 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4270 while (PL_doextract || gMacPerl_AlwaysExtract) {
4271 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4272 if (!gMacPerl_AlwaysExtract)
4273 Perl_croak(aTHX_ "No Perl script found in input\n");
4275 if (PL_doextract) /* require explicit override ? */
4276 if (!OverrideExtract(PL_origfilename))
4277 Perl_croak(aTHX_ "User aborted script\n");
4279 PL_doextract = FALSE;
4281 /* Pater peccavi, file does not have #! */
4282 PerlIO_rewind(PL_rsfp);
4287 while (PL_doextract) {
4288 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4289 Perl_croak(aTHX_ "No Perl script found in input\n");
4292 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4293 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4294 PL_doextract = FALSE;
4295 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4297 while (*s == ' ' || *s == '\t') s++;
4299 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4300 || s2[-1] == '_') s2--;
4301 if (strnEQ(s2-4,"perl",4))
4302 while ((s = moreswitches(s)))
4305 #ifdef MACOS_TRADITIONAL
4306 /* We are always searching for the #!perl line in MacPerl,
4307 * so if we find it, still keep the line count correct
4308 * by counting lines we already skipped over
4310 for (; maclines > 0 ; maclines--)
4311 PerlIO_ungetc(PL_rsfp, '\n');
4315 /* gMacPerl_AlwaysExtract is false in MPW tool */
4316 } else if (gMacPerl_AlwaysExtract) {
4328 PL_uid = PerlProc_getuid();
4329 PL_euid = PerlProc_geteuid();
4330 PL_gid = PerlProc_getgid();
4331 PL_egid = PerlProc_getegid();
4333 PL_uid |= PL_gid << 16;
4334 PL_euid |= PL_egid << 16;
4336 /* Should not happen: */
4337 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4338 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4341 * Should go by suidscript, not uid!=euid: why disallow
4342 * system("ls") in scripts run from setuid things?
4343 * Or, is this run before we check arguments and set suidscript?
4344 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4345 * (We never have suidscript, can we be sure to have fdscript?)
4346 * Or must then go by UID checks? See comments in forbid_setid also.
4350 /* This is used very early in the lifetime of the program,
4351 * before even the options are parsed, so PL_tainting has
4352 * not been initialized properly. */
4354 Perl_doing_taint(int argc, char *argv[], char *envp[])
4356 #ifndef PERL_IMPLICIT_SYS
4357 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4358 * before we have an interpreter-- and the whole point of this
4359 * function is to be called at such an early stage. If you are on
4360 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4361 * "tainted because running with altered effective ids', you'll
4362 * have to add your own checks somewhere in here. The two most
4363 * known samples of 'implicitness' are Win32 and NetWare, neither
4364 * of which has much of concept of 'uids'. */
4365 int uid = PerlProc_getuid();
4366 int euid = PerlProc_geteuid();
4367 int gid = PerlProc_getgid();
4368 int egid = PerlProc_getegid();
4375 if (uid && (euid != uid || egid != gid))
4377 #endif /* !PERL_IMPLICIT_SYS */
4378 /* This is a really primitive check; environment gets ignored only
4379 * if -T are the first chars together; otherwise one gets
4380 * "Too late" message. */
4381 if ( argc > 1 && argv[1][0] == '-'
4382 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4387 /* Passing the flag as a single char rather than a string is a slight space
4388 optimisation. The only message that isn't /^-.$/ is
4389 "program input from stdin", which is substituted in place of '\0', which
4390 could never be a command line flag. */
4392 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4395 char string[3] = "-x";
4396 const char *message = "program input from stdin";
4403 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4404 if (PL_euid != PL_uid)
4405 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4406 if (PL_egid != PL_gid)
4407 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4408 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4410 * Checks for UID/GID above "wrong": why disallow
4411 * perl -e 'print "Hello\n"'
4412 * from within setuid things?? Simply drop them: replaced by
4413 * fdscript/suidscript and #ifdef IAMSUID checks below.
4415 * This may be too late for command-line switches. Will catch those on
4416 * the #! line, after finding the script name and setting up
4417 * fdscript/suidscript. Note that suidperl does not get around to
4418 * parsing (and checking) the switches on the #! line, but checks that
4419 * the two sets are identical.
4421 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4422 * instead, or would that be "too late"? (We never have suidscript, can
4423 * we be sure to have fdscript?)
4425 * Catch things with suidscript (in descendant of suidperl), even with
4426 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4427 * below; but I am paranoid.
4429 * Also see comments about root running a setuid script, elsewhere.
4431 if (suidscript >= 0)
4432 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4434 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4435 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4436 #endif /* IAMSUID */
4440 Perl_init_debugger(pTHX)
4443 HV * const ostash = PL_curstash;
4445 PL_curstash = PL_debstash;
4446 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4448 AvREAL_off(PL_dbargs);
4449 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4450 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4451 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4452 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4453 sv_setiv(PL_DBsingle, 0);
4454 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4455 sv_setiv(PL_DBtrace, 0);
4456 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4457 sv_setiv(PL_DBsignal, 0);
4458 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4459 sv_setiv(PL_DBassertion, 0);
4460 PL_curstash = ostash;
4463 #ifndef STRESS_REALLOC
4464 #define REASONABLE(size) (size)
4466 #define REASONABLE(size) (1) /* unreasonable */
4470 Perl_init_stacks(pTHX)
4473 /* start with 128-item stack and 8K cxstack */
4474 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4475 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4476 PL_curstackinfo->si_type = PERLSI_MAIN;
4477 PL_curstack = PL_curstackinfo->si_stack;
4478 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4480 PL_stack_base = AvARRAY(PL_curstack);
4481 PL_stack_sp = PL_stack_base;
4482 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4484 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4487 PL_tmps_max = REASONABLE(128);
4489 Newx(PL_markstack,REASONABLE(32),I32);
4490 PL_markstack_ptr = PL_markstack;
4491 PL_markstack_max = PL_markstack + REASONABLE(32);
4495 Newx(PL_scopestack,REASONABLE(32),I32);
4496 PL_scopestack_ix = 0;
4497 PL_scopestack_max = REASONABLE(32);
4499 Newx(PL_savestack,REASONABLE(128),ANY);
4500 PL_savestack_ix = 0;
4501 PL_savestack_max = REASONABLE(128);
4510 while (PL_curstackinfo->si_next)
4511 PL_curstackinfo = PL_curstackinfo->si_next;
4512 while (PL_curstackinfo) {
4513 PERL_SI *p = PL_curstackinfo->si_prev;
4514 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4515 Safefree(PL_curstackinfo->si_cxstack);
4516 Safefree(PL_curstackinfo);
4517 PL_curstackinfo = p;
4519 Safefree(PL_tmps_stack);
4520 Safefree(PL_markstack);
4521 Safefree(PL_scopestack);
4522 Safefree(PL_savestack);
4532 lex_start(PL_linestr);
4534 PL_subname = newSVpvs("main");
4538 S_init_predump_symbols(pTHX)
4544 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4545 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4546 GvMULTI_on(PL_stdingv);
4547 io = GvIOp(PL_stdingv);
4548 IoTYPE(io) = IoTYPE_RDONLY;
4549 IoIFP(io) = PerlIO_stdin();
4550 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4552 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4554 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4557 IoTYPE(io) = IoTYPE_WRONLY;
4558 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4560 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4562 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4564 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4565 GvMULTI_on(PL_stderrgv);
4566 io = GvIOp(PL_stderrgv);
4567 IoTYPE(io) = IoTYPE_WRONLY;
4568 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4569 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 PL_statname = newSV(0); /* last filename we did stat on */
4575 Safefree(PL_osname);
4576 PL_osname = savepv(OSNAME);
4580 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4583 argc--,argv++; /* skip name of script */
4584 if (PL_doswitches) {
4585 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4589 if (argv[0][1] == '-' && !argv[0][2]) {
4593 if ((s = strchr(argv[0], '='))) {
4594 const char *const start_name = argv[0] + 1;
4595 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4596 TRUE, SVt_PV)), s + 1);
4599 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4602 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4603 GvMULTI_on(PL_argvgv);
4604 (void)gv_AVadd(PL_argvgv);
4605 av_clear(GvAVn(PL_argvgv));
4606 for (; argc > 0; argc--,argv++) {
4607 SV * const sv = newSVpv(argv[0],0);
4608 av_push(GvAVn(PL_argvgv),sv);
4609 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4610 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4613 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4614 (void)sv_utf8_decode(sv);
4620 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4625 PL_toptarget = newSV(0);
4626 sv_upgrade(PL_toptarget, SVt_PVFM);
4627 sv_setpvn(PL_toptarget, "", 0);
4628 PL_bodytarget = newSV(0);
4629 sv_upgrade(PL_bodytarget, SVt_PVFM);
4630 sv_setpvn(PL_bodytarget, "", 0);
4631 PL_formtarget = PL_bodytarget;
4635 init_argv_symbols(argc,argv);
4637 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4638 #ifdef MACOS_TRADITIONAL
4639 /* $0 is not majick on a Mac */
4640 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4642 sv_setpv(GvSV(tmpgv),PL_origfilename);
4643 magicname("0", "0", 1);
4646 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4648 GvMULTI_on(PL_envgv);
4649 hv = GvHVn(PL_envgv);
4650 hv_magic(hv, NULL, PERL_MAGIC_env);
4652 #ifdef USE_ENVIRON_ARRAY
4653 /* Note that if the supplied env parameter is actually a copy
4654 of the global environ then it may now point to free'd memory
4655 if the environment has been modified since. To avoid this
4656 problem we treat env==NULL as meaning 'use the default'
4661 # ifdef USE_ITHREADS
4662 && PL_curinterp == aTHX
4669 char** origenv = environ;
4672 for (; *env; env++) {
4673 if (!(s = strchr(*env,'=')) || s == *env)
4675 #if defined(MSDOS) && !defined(DJGPP)
4680 sv = newSVpv(s+1, 0);
4681 (void)hv_store(hv, *env, s - *env, sv, 0);
4684 if (origenv != environ) {
4685 /* realloc has shifted us */
4686 env = (env - origenv) + environ;
4691 #endif /* USE_ENVIRON_ARRAY */
4692 #endif /* !PERL_MICRO */
4695 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4696 SvREADONLY_off(GvSV(tmpgv));
4697 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4698 SvREADONLY_on(GvSV(tmpgv));
4700 #ifdef THREADS_HAVE_PIDS
4701 PL_ppid = (IV)getppid();
4704 /* touch @F array to prevent spurious warnings 20020415 MJD */
4706 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4708 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4709 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4710 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4714 S_init_perllib(pTHX)
4720 s = PerlEnv_getenv("PERL5LIB");
4722 * It isn't possible to delete an environment variable with
4723 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4724 * case we treat PERL5LIB as undefined if it has a zero-length value.
4726 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4727 if (s && *s != '\0')
4731 incpush(s, TRUE, TRUE, TRUE, FALSE);
4733 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4735 /* Treat PERL5?LIB as a possible search list logical name -- the
4736 * "natural" VMS idiom for a Unix path string. We allow each
4737 * element to be a set of |-separated directories for compatibility.
4741 if (my_trnlnm("PERL5LIB",buf,0))
4742 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4744 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4748 /* Use the ~-expanded versions of APPLLIB (undocumented),
4749 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4752 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4756 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4758 #ifdef MACOS_TRADITIONAL
4761 SV * privdir = newSV(0);
4762 char * macperl = PerlEnv_getenv("MACPERL");
4767 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4768 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4769 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4770 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4771 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4772 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4774 SvREFCNT_dec(privdir);
4777 incpush(":", FALSE, FALSE, TRUE, FALSE);
4780 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4783 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4785 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4789 /* sitearch is always relative to sitelib on Windows for
4790 * DLL-based path intuition to work correctly */
4791 # if !defined(WIN32)
4792 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4798 /* this picks up sitearch as well */
4799 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4801 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4805 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4806 /* Search for version-specific dirs below here */
4807 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4810 #ifdef PERL_VENDORARCH_EXP
4811 /* vendorarch is always relative to vendorlib on Windows for
4812 * DLL-based path intuition to work correctly */
4813 # if !defined(WIN32)
4814 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4818 #ifdef PERL_VENDORLIB_EXP
4820 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4822 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4826 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4827 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4830 #ifdef PERL_OTHERLIBDIRS
4831 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4835 incpush(".", FALSE, FALSE, TRUE, FALSE);
4836 #endif /* MACOS_TRADITIONAL */
4839 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4840 # define PERLLIB_SEP ';'
4843 # define PERLLIB_SEP '|'
4845 # if defined(MACOS_TRADITIONAL)
4846 # define PERLLIB_SEP ','
4848 # define PERLLIB_SEP ':'
4852 #ifndef PERLLIB_MANGLE
4853 # define PERLLIB_MANGLE(s,n) (s)
4856 /* Push a directory onto @INC if it exists.
4857 Generate a new SV if we do this, to save needing to copy the SV we push
4860 S_incpush_if_exists(pTHX_ SV *dir)
4864 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4865 S_ISDIR(tmpstatbuf.st_mode)) {
4866 av_push(GvAVn(PL_incgv), dir);
4873 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4878 const char *p = dir;
4883 if (addsubdirs || addoldvers) {
4887 /* Break at all separators */
4889 SV *libdir = newSV(0);
4892 /* skip any consecutive separators */
4894 while ( *p == PERLLIB_SEP ) {
4895 /* Uncomment the next line for PATH semantics */
4896 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4901 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4902 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4907 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4908 p = NULL; /* break out */
4910 #ifdef MACOS_TRADITIONAL
4911 if (!strchr(SvPVX(libdir), ':')) {
4914 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4916 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4917 sv_catpvs(libdir, ":");
4920 /* Do the if() outside the #ifdef to avoid warnings about an unused
4923 #ifdef PERL_RELOCATABLE_INC
4925 * Relocatable include entries are marked with a leading .../
4928 * 0: Remove that leading ".../"
4929 * 1: Remove trailing executable name (anything after the last '/')
4930 * from the perl path to give a perl prefix
4932 * While the @INC element starts "../" and the prefix ends with a real
4933 * directory (ie not . or ..) chop that real directory off the prefix
4934 * and the leading "../" from the @INC element. ie a logical "../"
4936 * Finally concatenate the prefix and the remainder of the @INC element
4937 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4938 * generates /usr/local/lib/perl5
4940 const char *libpath = SvPVX(libdir);
4941 STRLEN libpath_len = SvCUR(libdir);
4942 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4944 SV * const caret_X = get_sv("\030", 0);
4945 /* Going to use the SV just as a scratch buffer holding a C
4951 /* $^X is *the* source of taint if tainting is on, hence
4952 SvPOK() won't be true. */
4954 assert(SvPOKp(caret_X));
4955 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4956 /* Firstly take off the leading .../
4957 If all else fail we'll do the paths relative to the current
4959 sv_chop(libdir, libpath + 4);
4960 /* Don't use SvPV as we're intentionally bypassing taining,
4961 mortal copies that the mg_get of tainting creates, and
4962 corruption that seems to come via the save stack.
4963 I guess that the save stack isn't correctly set up yet. */
4964 libpath = SvPVX(libdir);
4965 libpath_len = SvCUR(libdir);
4967 /* This would work more efficiently with memrchr, but as it's
4968 only a GNU extension we'd need to probe for it and
4969 implement our own. Not hard, but maybe not worth it? */
4971 prefix = SvPVX(prefix_sv);
4972 lastslash = strrchr(prefix, '/');
4974 /* First time in with the *lastslash = '\0' we just wipe off
4975 the trailing /perl from (say) /usr/foo/bin/perl
4979 while ((*lastslash = '\0'), /* Do that, come what may. */
4980 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4981 && (lastslash = strrchr(prefix, '/')))) {
4982 if (lastslash[1] == '\0'
4983 || (lastslash[1] == '.'
4984 && (lastslash[2] == '/' /* ends "/." */
4985 || (lastslash[2] == '/'
4986 && lastslash[3] == '/' /* or "/.." */
4988 /* Prefix ends "/" or "/." or "/..", any of which
4989 are fishy, so don't do any more logical cleanup.
4993 /* Remove leading "../" from path */
4996 /* Next iteration round the loop removes the last
4997 directory name from prefix by writing a '\0' in
4998 the while clause. */
5000 /* prefix has been terminated with a '\0' to the correct
5001 length. libpath points somewhere into the libdir SV.
5002 We need to join the 2 with '/' and drop the result into
5004 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5005 SvREFCNT_dec(libdir);
5006 /* And this is the new libdir. */
5009 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5010 /* Need to taint reloccated paths if running set ID */
5011 SvTAINTED_on(libdir);
5014 SvREFCNT_dec(prefix_sv);
5019 * BEFORE pushing libdir onto @INC we may first push version- and
5020 * archname-specific sub-directories.
5022 if (addsubdirs || addoldvers) {
5023 #ifdef PERL_INC_VERSION_LIST
5024 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5025 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5026 const char * const *incver;
5032 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5034 while (unix[len-1] == '/') len--; /* Cosmetic */
5035 sv_usepvn(libdir,unix,len);
5038 PerlIO_printf(Perl_error_log,
5039 "Failed to unixify @INC element \"%s\"\n",
5043 #ifdef MACOS_TRADITIONAL
5044 #define PERL_AV_SUFFIX_FMT ""
5045 #define PERL_ARCH_FMT "%s:"
5046 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5048 #define PERL_AV_SUFFIX_FMT "/"
5049 #define PERL_ARCH_FMT "/%s"
5050 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5052 /* .../version/archname if -d .../version/archname */
5053 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5055 (int)PERL_REVISION, (int)PERL_VERSION,
5056 (int)PERL_SUBVERSION, ARCHNAME);
5057 subdir = S_incpush_if_exists(aTHX_ subdir);
5059 /* .../version if -d .../version */
5060 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5062 (int)PERL_REVISION, (int)PERL_VERSION,
5063 (int)PERL_SUBVERSION);
5064 subdir = S_incpush_if_exists(aTHX_ subdir);
5066 /* .../archname if -d .../archname */
5067 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5068 (void*)libdir, ARCHNAME);
5069 subdir = S_incpush_if_exists(aTHX_ subdir);
5073 #ifdef PERL_INC_VERSION_LIST
5075 for (incver = incverlist; *incver; incver++) {
5076 /* .../xxx if -d .../xxx */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5078 subdir = S_incpush_if_exists(aTHX_ subdir);
5084 /* finally push this lib directory on the end of @INC */
5085 av_push(GvAVn(PL_incgv), libdir);
5088 assert (SvREFCNT(subdir) == 1);
5089 SvREFCNT_dec(subdir);
5095 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5099 const line_t oldline = CopLINE(PL_curcop);
5105 while (av_len(paramList) >= 0) {
5106 cv = (CV*)av_shift(paramList);
5108 if (paramList == PL_beginav) {
5109 /* save PL_beginav for compiler */
5110 if (! PL_beginav_save)
5111 PL_beginav_save = newAV();
5112 av_push(PL_beginav_save, (SV*)cv);
5114 else if (paramList == PL_checkav) {
5115 /* save PL_checkav for compiler */
5116 if (! PL_checkav_save)
5117 PL_checkav_save = newAV();
5118 av_push(PL_checkav_save, (SV*)cv);
5129 PL_madskills |= 16384;
5134 PL_madskills &= ~16384;
5137 (void)SvPV_const(atsv, len);
5138 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5139 break; /* not really trying to run, so just wing it */
5141 PL_curcop = &PL_compiling;
5142 CopLINE_set(PL_curcop, oldline);
5143 if (paramList == PL_beginav)
5144 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5146 Perl_sv_catpvf(aTHX_ atsv,
5147 "%s failed--call queue aborted",
5148 paramList == PL_checkav ? "CHECK"
5149 : paramList == PL_initav ? "INIT"
5151 while (PL_scopestack_ix > oldscope)
5154 Perl_croak(aTHX_ "%"SVf"", (void*)atsv);
5161 /* my_exit() was called */
5162 while (PL_scopestack_ix > oldscope)
5165 PL_curstash = PL_defstash;
5166 PL_curcop = &PL_compiling;
5167 CopLINE_set(PL_curcop, oldline);
5169 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5170 return; /* not really trying to run, so just wing it */
5171 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5172 if (paramList == PL_beginav)
5173 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5175 Perl_croak(aTHX_ "%s failed--call queue aborted",
5176 paramList == PL_checkav ? "CHECK"
5177 : paramList == PL_initav ? "INIT"
5184 PL_curcop = &PL_compiling;
5185 CopLINE_set(PL_curcop, oldline);
5188 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5197 Perl_my_exit(pTHX_ U32 status)
5200 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5201 thr, (unsigned long) status));
5210 STATUS_EXIT_SET(status);
5217 Perl_my_failure_exit(pTHX)
5221 /* We have been called to fall on our sword. The desired exit code
5222 * should be already set in STATUS_UNIX, but could be shifted over
5223 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5226 * If an error code has not been set, then force the issue.
5228 if (MY_POSIX_EXIT) {
5230 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5231 * the exit code when there isn't an error.
5234 if (STATUS_UNIX == 0)
5235 STATUS_UNIX_EXIT_SET(255);
5237 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5239 /* The exit code could have been set by $? or vmsish which
5240 * means that it may not be fatal. So convert
5241 * success/warning codes to fatal.
5243 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5244 STATUS_UNIX_EXIT_SET(255);
5248 /* Traditionally Perl on VMS always expects a Fatal Error. */
5249 if (vaxc$errno & 1) {
5251 /* So force success status to failure */
5252 if (STATUS_NATIVE & 1)
5257 STATUS_UNIX = EINTR; /* In case something cares */
5262 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5264 /* Encode the severity code */
5265 severity = STATUS_NATIVE & STS$M_SEVERITY;
5266 STATUS_UNIX = (severity ? severity : 1) << 8;
5268 /* Perl expects this to be a fatal error */
5269 if (severity != STS$K_SEVERE)
5278 STATUS_UNIX_SET(errno);
5280 exitstatus = STATUS_UNIX >> 8;
5281 if (exitstatus & 255)
5282 STATUS_UNIX_SET(exitstatus);
5284 STATUS_UNIX_SET(255);
5291 S_my_exit_jump(pTHX)
5296 SvREFCNT_dec(PL_e_script);
5300 POPSTACK_TO(PL_mainstack);
5308 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5311 const char * const p = SvPVX_const(PL_e_script);
5312 const char *nl = strchr(p, '\n');
5314 PERL_UNUSED_ARG(idx);
5315 PERL_UNUSED_ARG(maxlen);
5317 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5319 filter_del(read_e_script);
5322 sv_catpvn(buf_sv, p, nl-p);
5323 sv_chop(PL_e_script, nl);
5329 * c-indentation-style: bsd
5331 * indent-tabs-mode: t
5334 * ex: set ts=8 sts=4 sw=4 noet: