3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
175 PERL_SET_THX(my_perl);
179 #ifdef PERL_IMPLICIT_SYS
181 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
182 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
183 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
184 struct IPerlDir* ipD, struct IPerlSock* ipS,
185 struct IPerlProc* ipP)
187 PerlInterpreter *my_perl;
188 /* Newx() needs interpreter, so call malloc() instead */
189 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
190 S_init_tls_and_interp(my_perl);
191 Zero(my_perl, 1, PerlInterpreter);
201 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 =head1 Embedding Functions
210 =for apidoc perl_alloc
212 Allocates a new Perl interpreter. See L<perlembed>.
220 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 S_init_tls_and_interp(my_perl);
226 #ifndef PERL_TRACK_MEMPOOL
227 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
229 Zero(my_perl, 1, PerlInterpreter);
230 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
234 #endif /* PERL_IMPLICIT_SYS */
237 =for apidoc perl_construct
239 Initializes a new Perl interpreter. See L<perlembed>.
245 perl_construct(pTHXx)
248 PERL_UNUSED_ARG(my_perl);
251 PL_perl_destruct_level = 1;
253 if (PL_perl_destruct_level > 0)
256 /* Init the real globals (and main thread)? */
258 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
260 PL_linestr = newSV(79);
261 sv_upgrade(PL_linestr,SVt_PVIV);
263 if (!SvREADONLY(&PL_sv_undef)) {
264 /* set read-only and try to insure than we wont see REFCNT==0
267 SvREADONLY_on(&PL_sv_undef);
268 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
270 sv_setpv(&PL_sv_no,PL_No);
271 /* value lookup in void context - happens to have the side effect
272 of caching the numeric forms. */
275 SvREADONLY_on(&PL_sv_no);
276 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
278 sv_setpv(&PL_sv_yes,PL_Yes);
281 SvREADONLY_on(&PL_sv_yes);
282 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
284 SvREADONLY_on(&PL_sv_placeholder);
285 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
288 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
289 #ifdef PERL_USES_PL_PIDSTATUS
290 PL_pidstatus = newHV();
294 PL_rs = newSVpvs("\n");
299 PL_lex_state = LEX_NOTPARSING;
305 SET_NUMERIC_STANDARD();
307 #if defined(LOCAL_PATCH_COUNT)
308 PL_localpatches = local_patches; /* For possible -v */
311 #ifdef HAVE_INTERP_INTERN
315 PerlIO_init(aTHX); /* Hook to IO system */
317 PL_fdpid = newAV(); /* for remembering popen pids by fd */
318 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
319 PL_errors = newSVpvs("");
320 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
321 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
322 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
324 PL_regex_padav = newAV();
325 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
326 PL_regex_pad = AvARRAY(PL_regex_padav);
328 #ifdef USE_REENTRANT_API
329 Perl_reentrant_init(aTHX);
332 /* Note that strtab is a rather special HV. Assumptions are made
333 about not iterating on it, and not adding tie magic to it.
334 It is properly deallocated in perl_destruct() */
337 HvSHAREKEYS_off(PL_strtab); /* mandatory */
338 hv_ksplit(PL_strtab, 512);
340 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
341 _dyld_lookup_and_bind
342 ("__environ", (unsigned long *) &environ_pointer, NULL);
346 # ifdef USE_ENVIRON_ARRAY
347 PL_origenviron = environ;
351 /* Use sysconf(_SC_CLK_TCK) if available, if not
352 * available or if the sysconf() fails, use the HZ.
353 * BeOS has those, but returns the wrong value.
354 * The HZ if not originally defined has been by now
355 * been defined as CLK_TCK, if available. */
356 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
357 PL_clocktick = sysconf(_SC_CLK_TCK);
358 if (PL_clocktick <= 0)
362 PL_stashcache = newHV();
364 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
365 (int)PERL_VERSION, (int)PERL_SUBVERSION);
368 if (!PL_mmap_page_size) {
369 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
371 SETERRNO(0, SS_NORMAL);
373 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
375 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
377 if ((long) PL_mmap_page_size < 0) {
379 SV * const error = ERRSV;
380 SvUPGRADE(error, SVt_PV);
381 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
384 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
388 # ifdef HAS_GETPAGESIZE
389 PL_mmap_page_size = getpagesize();
391 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
392 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
396 if (PL_mmap_page_size <= 0)
397 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
398 (IV) PL_mmap_page_size);
400 #endif /* HAS_MMAP */
402 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
403 PL_timesbase.tms_utime = 0;
404 PL_timesbase.tms_stime = 0;
405 PL_timesbase.tms_cutime = 0;
406 PL_timesbase.tms_cstime = 0;
417 =for apidoc nothreadhook
419 Stub that provides thread hook for perl_destruct when there are
426 Perl_nothreadhook(pTHX)
432 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
434 Perl_dump_sv_child(pTHX_ SV *sv)
437 const int sock = PL_dumper_fd;
438 const int debug_fd = PerlIO_fileno(Perl_debug_log);
439 union control_un control;
442 struct cmsghdr *cmptr;
444 unsigned char buffer[256];
446 if(sock == -1 || debug_fd == -1)
449 PerlIO_flush(Perl_debug_log);
451 /* All these shenanigans are to pass a file descriptor over to our child for
452 it to dump out to. We can't let it hold open the file descriptor when it
453 forks, as the file descriptor it will dump to can turn out to be one end
454 of pipe that some other process will wait on for EOF. (So as it would
455 be open, the wait would be forever.) */
457 msg.msg_control = control.control;
458 msg.msg_controllen = sizeof(control.control);
459 /* We're a connected socket so we don't need a destination */
465 cmptr = CMSG_FIRSTHDR(&msg);
466 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
467 cmptr->cmsg_level = SOL_SOCKET;
468 cmptr->cmsg_type = SCM_RIGHTS;
469 *((int *)CMSG_DATA(cmptr)) = 1;
471 vec[0].iov_base = (void*)&sv;
472 vec[0].iov_len = sizeof(sv);
473 got = sendmsg(sock, &msg, 0);
476 perror("Debug leaking scalars parent sendmsg failed");
479 if(got < sizeof(sv)) {
480 perror("Debug leaking scalars parent short sendmsg");
484 /* Return protocol is
486 unsigned char: length of location string (0 for empty)
487 unsigned char*: string (not terminated)
489 vec[0].iov_base = (void*)&returned_errno;
490 vec[0].iov_len = sizeof(returned_errno);
491 vec[1].iov_base = buffer;
494 got = readv(sock, vec, 2);
497 perror("Debug leaking scalars parent read failed");
498 PerlIO_flush(PerlIO_stderr());
501 if(got < sizeof(returned_errno) + 1) {
502 perror("Debug leaking scalars parent short read");
503 PerlIO_flush(PerlIO_stderr());
508 got = read(sock, buffer + 1, *buffer);
510 perror("Debug leaking scalars parent read 2 failed");
511 PerlIO_flush(PerlIO_stderr());
516 perror("Debug leaking scalars parent short read 2");
517 PerlIO_flush(PerlIO_stderr());
522 if (returned_errno || *buffer) {
523 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
524 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
525 returned_errno, strerror(returned_errno));
531 =for apidoc perl_destruct
533 Shuts down a Perl interpreter. See L<perlembed>.
542 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
544 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
548 PERL_UNUSED_ARG(my_perl);
550 /* wait for all pseudo-forked children to finish */
551 PERL_WAIT_FOR_CHILDREN;
553 destruct_level = PL_perl_destruct_level;
556 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
558 const int i = atoi(s);
559 if (destruct_level < i)
565 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
571 if (PL_endav && !PL_minus_c)
572 call_list(PL_scopestack_ix, PL_endav);
578 /* Need to flush since END blocks can produce output */
581 if (CALL_FPTR(PL_threadhook)(aTHX)) {
582 /* Threads hook has vetoed further cleanup */
583 PL_veto_cleanup = TRUE;
587 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
588 if (destruct_level != 0) {
589 /* Fork here to create a child. Our child's job is to preserve the
590 state of scalars prior to destruction, so that we can instruct it
591 to dump any scalars that we later find have leaked.
592 There's no subtlety in this code - it assumes POSIX, and it doesn't
596 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
597 perror("Debug leaking scalars socketpair failed");
603 perror("Debug leaking scalars fork failed");
607 /* We are the child */
608 const int sock = fd[1];
609 const int debug_fd = PerlIO_fileno(Perl_debug_log);
612 /* Our success message is an integer 0, and a char 0 */
613 static const char success[sizeof(int) + 1];
617 /* We need to close all other file descriptors otherwise we end up
618 with interesting hangs, where the parent closes its end of a
619 pipe, and sits waiting for (another) child to terminate. Only
620 that child never terminates, because it never gets EOF, because
621 we also have the far end of the pipe open. We even need to
622 close the debugging fd, because sometimes it happens to be one
623 end of a pipe, and a process is waiting on the other end for
624 EOF. Normally it would be closed at some point earlier in
625 destruction, but if we happen to cause the pipe to remain open,
626 EOF never occurs, and we get an infinite hang. Hence all the
627 games to pass in a file descriptor if it's actually needed. */
629 f = sysconf(_SC_OPEN_MAX);
631 where = "sysconf failed";
642 union control_un control;
645 struct cmsghdr *cmptr;
649 msg.msg_control = control.control;
650 msg.msg_controllen = sizeof(control.control);
651 /* We're a connected socket so we don't need a source */
655 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
657 vec[0].iov_base = (void*)⌖
658 vec[0].iov_len = sizeof(target);
660 got = recvmsg(sock, &msg, 0);
665 where = "recv failed";
668 if(got < sizeof(target)) {
669 where = "short recv";
673 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
677 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
678 where = "wrong cmsg_len";
681 if(cmptr->cmsg_level != SOL_SOCKET) {
682 where = "wrong cmsg_level";
685 if(cmptr->cmsg_type != SCM_RIGHTS) {
686 where = "wrong cmsg_type";
690 got_fd = *(int*)CMSG_DATA(cmptr);
691 /* For our last little bit of trickery, put the file descriptor
692 back into Perl_debug_log, as if we never actually closed it
694 if(got_fd != debug_fd) {
695 if (dup2(got_fd, debug_fd) == -1) {
702 PerlIO_flush(Perl_debug_log);
704 got = write(sock, &success, sizeof(success));
707 where = "write failed";
710 if(got < sizeof(success)) {
711 where = "short write";
718 int send_errno = errno;
719 unsigned char length = (unsigned char) strlen(where);
720 struct iovec failure[3] = {
721 {(void*)&send_errno, sizeof(send_errno)},
723 {(void*)where, length}
725 int got = writev(sock, failure, 3);
726 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
727 in the parent if we try to read from the socketpair after the
728 child has exited, even if there was data to read.
729 So sleep a bit to give the parent a fighting chance of
732 _exit((got == -1) ? errno : 0);
736 PL_dumper_fd = fd[0];
741 /* We must account for everything. */
743 /* Destroy the main CV and syntax tree */
744 /* Do this now, because destroying ops can cause new SVs to be generated
745 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
746 PL_curcop to point to a valid op from which the filename structure
748 PL_curcop = &PL_compiling;
750 /* ensure comppad/curpad to refer to main's pad */
751 if (CvPADLIST(PL_main_cv)) {
752 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
754 op_free(PL_main_root);
757 PL_main_start = NULL;
758 SvREFCNT_dec(PL_main_cv);
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
777 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
778 PL_defoutgv = NULL; /* may have been freed */
781 /* unhook hooks which will soon be, or use, destroyed data */
782 SvREFCNT_dec(PL_warnhook);
784 SvREFCNT_dec(PL_diehook);
787 /* call exit list functions */
788 while (PL_exitlistlen-- > 0)
789 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
791 Safefree(PL_exitlist);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
838 /* reset so print() ends up where we expect */
842 /* the syntax tree is shared between clones
843 * so op_free(PL_main_root) only ReREFCNT_dec's
844 * REGEXPs in the parent interpreter
845 * we need to manually ReREFCNT_dec for the clones
848 I32 i = AvFILLp(PL_regex_padav) + 1;
849 SV * const * const ary = AvARRAY(PL_regex_padav);
852 SV * const resv = ary[--i];
854 if (SvFLAGS(resv) & SVf_BREAK) {
855 /* this is PL_reg_curpm, already freed
856 * flag is set in regexec.c:S_regtry
858 SvFLAGS(resv) &= ~SVf_BREAK;
860 else if(SvREPADTMP(resv)) {
861 SvREPADTMP_off(resv);
863 else if(SvIOKp(resv)) {
864 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
869 SvREFCNT_dec(PL_regex_padav);
870 PL_regex_padav = NULL;
874 SvREFCNT_dec((SV*) PL_stashcache);
875 PL_stashcache = NULL;
877 /* loosen bonds of global variables */
880 (void)PerlIO_close(PL_rsfp);
884 /* Filters for program text */
885 SvREFCNT_dec(PL_rsfp_filters);
886 PL_rsfp_filters = NULL;
889 Safefree(PL_splitstr);
894 PL_preprocess = FALSE;
900 PL_doswitches = FALSE;
901 PL_dowarn = G_WARN_OFF;
902 PL_doextract = FALSE;
903 PL_sawampersand = FALSE; /* must save all match strings */
906 Safefree(PL_inplace);
908 SvREFCNT_dec(PL_patchlevel);
911 SvREFCNT_dec(PL_e_script);
917 /* magical thingies */
919 SvREFCNT_dec(PL_ofs_sv); /* $, */
922 SvREFCNT_dec(PL_ors_sv); /* $\ */
925 SvREFCNT_dec(PL_rs); /* $/ */
928 Safefree(PL_osname); /* $^O */
931 SvREFCNT_dec(PL_statname);
935 /* defgv, aka *_ should be taken care of elsewhere */
937 /* clean up after study() */
938 SvREFCNT_dec(PL_lastscream);
939 PL_lastscream = NULL;
940 Safefree(PL_screamfirst);
942 Safefree(PL_screamnext);
946 Safefree(PL_efloatbuf);
950 /* startup and shutdown function lists */
951 SvREFCNT_dec(PL_beginav);
952 SvREFCNT_dec(PL_beginav_save);
953 SvREFCNT_dec(PL_endav);
954 SvREFCNT_dec(PL_checkav);
955 SvREFCNT_dec(PL_checkav_save);
956 SvREFCNT_dec(PL_unitcheckav);
957 SvREFCNT_dec(PL_unitcheckav_save);
958 SvREFCNT_dec(PL_initav);
960 PL_beginav_save = NULL;
963 PL_checkav_save = NULL;
964 PL_unitcheckav = NULL;
965 PL_unitcheckav_save = NULL;
968 /* shortcuts just get cleared */
977 PL_last_in_gv = NULL;
985 PL_DBassertion = NULL;
990 SvREFCNT_dec(PL_argvout_stack);
991 PL_argvout_stack = NULL;
993 SvREFCNT_dec(PL_modglobal);
995 SvREFCNT_dec(PL_preambleav);
996 PL_preambleav = NULL;
997 SvREFCNT_dec(PL_subname);
999 SvREFCNT_dec(PL_linestr);
1001 #ifdef PERL_USES_PL_PIDSTATUS
1002 SvREFCNT_dec(PL_pidstatus);
1003 PL_pidstatus = NULL;
1005 SvREFCNT_dec(PL_toptarget);
1006 PL_toptarget = NULL;
1007 SvREFCNT_dec(PL_bodytarget);
1008 PL_bodytarget = NULL;
1009 PL_formtarget = NULL;
1011 /* free locale stuff */
1012 #ifdef USE_LOCALE_COLLATE
1013 Safefree(PL_collation_name);
1014 PL_collation_name = NULL;
1017 #ifdef USE_LOCALE_NUMERIC
1018 Safefree(PL_numeric_name);
1019 PL_numeric_name = NULL;
1020 SvREFCNT_dec(PL_numeric_radix_sv);
1021 PL_numeric_radix_sv = NULL;
1024 /* clear utf8 character classes */
1025 SvREFCNT_dec(PL_utf8_alnum);
1026 SvREFCNT_dec(PL_utf8_alnumc);
1027 SvREFCNT_dec(PL_utf8_ascii);
1028 SvREFCNT_dec(PL_utf8_alpha);
1029 SvREFCNT_dec(PL_utf8_space);
1030 SvREFCNT_dec(PL_utf8_cntrl);
1031 SvREFCNT_dec(PL_utf8_graph);
1032 SvREFCNT_dec(PL_utf8_digit);
1033 SvREFCNT_dec(PL_utf8_upper);
1034 SvREFCNT_dec(PL_utf8_lower);
1035 SvREFCNT_dec(PL_utf8_print);
1036 SvREFCNT_dec(PL_utf8_punct);
1037 SvREFCNT_dec(PL_utf8_xdigit);
1038 SvREFCNT_dec(PL_utf8_mark);
1039 SvREFCNT_dec(PL_utf8_toupper);
1040 SvREFCNT_dec(PL_utf8_totitle);
1041 SvREFCNT_dec(PL_utf8_tolower);
1042 SvREFCNT_dec(PL_utf8_tofold);
1043 SvREFCNT_dec(PL_utf8_idstart);
1044 SvREFCNT_dec(PL_utf8_idcont);
1045 PL_utf8_alnum = NULL;
1046 PL_utf8_alnumc = NULL;
1047 PL_utf8_ascii = NULL;
1048 PL_utf8_alpha = NULL;
1049 PL_utf8_space = NULL;
1050 PL_utf8_cntrl = NULL;
1051 PL_utf8_graph = NULL;
1052 PL_utf8_digit = NULL;
1053 PL_utf8_upper = NULL;
1054 PL_utf8_lower = NULL;
1055 PL_utf8_print = NULL;
1056 PL_utf8_punct = NULL;
1057 PL_utf8_xdigit = NULL;
1058 PL_utf8_mark = NULL;
1059 PL_utf8_toupper = NULL;
1060 PL_utf8_totitle = NULL;
1061 PL_utf8_tolower = NULL;
1062 PL_utf8_tofold = NULL;
1063 PL_utf8_idstart = NULL;
1064 PL_utf8_idcont = NULL;
1066 if (!specialWARN(PL_compiling.cop_warnings))
1067 PerlMemShared_free(PL_compiling.cop_warnings);
1068 PL_compiling.cop_warnings = NULL;
1069 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1070 PL_compiling.cop_hints_hash = NULL;
1071 CopFILE_free(&PL_compiling);
1072 CopSTASH_free(&PL_compiling);
1074 /* Prepare to destruct main symbol table. */
1079 SvREFCNT_dec(PL_curstname);
1080 PL_curstname = NULL;
1082 /* clear queued errors */
1083 SvREFCNT_dec(PL_errors);
1087 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1088 if (PL_scopestack_ix != 0)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1090 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1091 (long)PL_scopestack_ix);
1092 if (PL_savestack_ix != 0)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1094 "Unbalanced saves: %ld more saves than restores\n",
1095 (long)PL_savestack_ix);
1096 if (PL_tmps_floor != -1)
1097 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1098 (long)PL_tmps_floor + 1);
1099 if (cxstack_ix != -1)
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1101 (long)cxstack_ix + 1);
1104 /* Now absolutely destruct everything, somehow or other, loops or no. */
1105 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1106 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1108 /* the 2 is for PL_fdpid and PL_strtab */
1109 while (PL_sv_count > 2 && sv_clean_all())
1112 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1113 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1114 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1115 SvFLAGS(PL_strtab) |= SVt_PVHV;
1117 AvREAL_off(PL_fdpid); /* no surviving entries */
1118 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1121 #ifdef HAVE_INTERP_INTERN
1125 /* Destruct the global string table. */
1127 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1128 * so that sv_free() won't fail on them.
1129 * Now that the global string table is using a single hunk of memory
1130 * for both HE and HEK, we either need to explicitly unshare it the
1131 * correct way, or actually free things here.
1134 const I32 max = HvMAX(PL_strtab);
1135 HE * const * const array = HvARRAY(PL_strtab);
1136 HE *hent = array[0];
1139 if (hent && ckWARN_d(WARN_INTERNAL)) {
1140 HE * const next = HeNEXT(hent);
1141 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1142 "Unbalanced string table refcount: (%ld) for \"%s\"",
1143 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1150 hent = array[riter];
1155 HvARRAY(PL_strtab) = 0;
1156 HvTOTALKEYS(PL_strtab) = 0;
1157 HvFILL(PL_strtab) = 0;
1159 SvREFCNT_dec(PL_strtab);
1162 /* free the pointer tables used for cloning */
1163 ptr_table_free(PL_ptr_table);
1164 PL_ptr_table = (PTR_TBL_t*)NULL;
1167 /* free special SVs */
1169 SvREFCNT(&PL_sv_yes) = 0;
1170 sv_clear(&PL_sv_yes);
1171 SvANY(&PL_sv_yes) = NULL;
1172 SvFLAGS(&PL_sv_yes) = 0;
1174 SvREFCNT(&PL_sv_no) = 0;
1175 sv_clear(&PL_sv_no);
1176 SvANY(&PL_sv_no) = NULL;
1177 SvFLAGS(&PL_sv_no) = 0;
1181 for (i=0; i<=2; i++) {
1182 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1183 sv_clear(PERL_DEBUG_PAD(i));
1184 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1185 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1189 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1190 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1192 #ifdef DEBUG_LEAKING_SCALARS
1193 if (PL_sv_count != 0) {
1198 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1199 svend = &sva[SvREFCNT(sva)];
1200 for (sv = sva + 1; sv < svend; ++sv) {
1201 if (SvTYPE(sv) != SVTYPEMASK) {
1202 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1204 " refcnt=%"UVuf pTHX__FORMAT "\n"
1205 "\tallocated at %s:%d %s %s%s\n",
1206 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1207 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1209 sv->sv_debug_inpad ? "for" : "by",
1210 sv->sv_debug_optype ?
1211 PL_op_name[sv->sv_debug_optype]: "(none)",
1212 sv->sv_debug_cloned ? " (cloned)" : ""
1214 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1215 Perl_dump_sv_child(aTHX_ sv);
1221 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1225 /* Wait for up to 4 seconds for child to terminate.
1226 This seems to be the least effort way of timing out on reaping
1228 struct timeval waitfor = {4, 0};
1229 int sock = PL_dumper_fd;
1233 FD_SET(sock, &rset);
1234 select(sock + 1, &rset, NULL, NULL, &waitfor);
1235 waitpid(child, &status, WNOHANG);
1243 #if defined(PERLIO_LAYERS)
1244 /* No more IO - including error messages ! */
1245 PerlIO_cleanup(aTHX);
1248 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1249 as currently layers use it rather than NULL as a marker
1250 for no arg - and will try and SvREFCNT_dec it.
1252 SvREFCNT(&PL_sv_undef) = 0;
1253 SvREADONLY_off(&PL_sv_undef);
1255 Safefree(PL_origfilename);
1256 PL_origfilename = NULL;
1257 Safefree(PL_reg_start_tmp);
1258 PL_reg_start_tmp = (char**)NULL;
1259 PL_reg_start_tmpl = 0;
1260 Safefree(PL_reg_curpm);
1261 Safefree(PL_reg_poscache);
1262 free_tied_hv_pool();
1263 Safefree(PL_op_mask);
1264 Safefree(PL_psig_ptr);
1265 PL_psig_ptr = (SV**)NULL;
1266 Safefree(PL_psig_name);
1267 PL_psig_name = (SV**)NULL;
1268 Safefree(PL_bitcount);
1270 Safefree(PL_psig_pend);
1271 PL_psig_pend = (int*)NULL;
1274 PL_tainting = FALSE;
1275 PL_taint_warn = FALSE;
1276 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1279 DEBUG_P(debprofdump());
1281 #ifdef USE_REENTRANT_API
1282 Perl_reentrant_free(aTHX);
1287 while (PL_regmatch_slab) {
1288 regmatch_slab *s = PL_regmatch_slab;
1289 PL_regmatch_slab = PL_regmatch_slab->next;
1293 /* As the absolutely last thing, free the non-arena SV for mess() */
1296 /* we know that type == SVt_PVMG */
1298 /* it could have accumulated taint magic */
1301 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1302 moremagic = mg->mg_moremagic;
1303 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1305 Safefree(mg->mg_ptr);
1309 /* we know that type >= SVt_PV */
1310 SvPV_free(PL_mess_sv);
1311 Safefree(SvANY(PL_mess_sv));
1312 Safefree(PL_mess_sv);
1319 =for apidoc perl_free
1321 Releases a Perl interpreter. See L<perlembed>.
1329 if (PL_veto_cleanup)
1332 #ifdef PERL_TRACK_MEMPOOL
1335 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1336 * value as we're probably hunting memory leaks then
1338 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1339 if (!s || atoi(s) == 0) {
1340 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1341 thread at thread exit. */
1342 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1343 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1348 #if defined(WIN32) || defined(NETWARE)
1349 # if defined(PERL_IMPLICIT_SYS)
1352 void *host = nw_internal_host;
1354 void *host = w32_internal_host;
1356 PerlMem_free(aTHXx);
1358 nw_delete_internal_host(host);
1360 win32_delete_internal_host(host);
1364 PerlMem_free(aTHXx);
1367 PerlMem_free(aTHXx);
1371 #if defined(USE_ITHREADS)
1372 /* provide destructors to clean up the thread key when libperl is unloaded */
1373 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1375 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1376 #pragma fini "perl_fini"
1377 #elif defined(__sun) && !defined(__GNUC__)
1378 #pragma fini (perl_fini)
1382 #if defined(__GNUC__)
1383 __attribute__((destructor))
1388 if (PL_curinterp && !PL_veto_cleanup)
1393 #endif /* THREADS */
1396 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1399 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1400 PL_exitlist[PL_exitlistlen].fn = fn;
1401 PL_exitlist[PL_exitlistlen].ptr = ptr;
1405 #ifdef HAS_PROCSELFEXE
1406 /* This is a function so that we don't hold on to MAXPATHLEN
1407 bytes of stack longer than necessary
1410 S_procself_val(pTHX_ SV *sv, const char *arg0)
1412 char buf[MAXPATHLEN];
1413 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1415 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1416 includes a spurious NUL which will cause $^X to fail in system
1417 or backticks (this will prevent extensions from being built and
1418 many tests from working). readlink is not meant to add a NUL.
1419 Normal readlink works fine.
1421 if (len > 0 && buf[len-1] == '\0') {
1425 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1426 returning the text "unknown" from the readlink rather than the path
1427 to the executable (or returning an error from the readlink). Any valid
1428 path has a '/' in it somewhere, so use that to validate the result.
1429 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1431 if (len > 0 && memchr(buf, '/', len)) {
1432 sv_setpvn(sv,buf,len);
1438 #endif /* HAS_PROCSELFEXE */
1441 S_set_caret_X(pTHX) {
1443 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1445 #ifdef HAS_PROCSELFEXE
1446 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1449 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1451 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1458 =for apidoc perl_parse
1460 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1466 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1473 PERL_UNUSED_ARG(my_perl);
1475 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1478 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1479 setuid perl scripts securely.\n");
1480 #endif /* IAMSUID */
1483 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1484 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1485 * This MUST be done before any hash stores or fetches take place.
1486 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1487 * yourself, it is your responsibility to provide a good random seed!
1488 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1489 if (!PL_rehash_seed_set)
1490 PL_rehash_seed = get_hash_seed();
1492 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1494 if (s && (atoi(s) == 1))
1495 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1497 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1502 if (PL_origalen != 0) {
1503 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1506 /* Set PL_origalen be the sum of the contiguous argv[]
1507 * elements plus the size of the env in case that it is
1508 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1509 * as the maximum modifiable length of $0. In the worst case
1510 * the area we are able to modify is limited to the size of
1511 * the original argv[0]. (See below for 'contiguous', though.)
1513 const char *s = NULL;
1516 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1517 /* Do the mask check only if the args seem like aligned. */
1519 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1521 /* See if all the arguments are contiguous in memory. Note
1522 * that 'contiguous' is a loose term because some platforms
1523 * align the argv[] and the envp[]. If the arguments look
1524 * like non-aligned, assume that they are 'strictly' or
1525 * 'traditionally' contiguous. If the arguments look like
1526 * aligned, we just check that they are within aligned
1527 * PTRSIZE bytes. As long as no system has something bizarre
1528 * like the argv[] interleaved with some other data, we are
1529 * fine. (Did I just evoke Murphy's Law?) --jhi */
1530 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1532 for (i = 1; i < PL_origargc; i++) {
1533 if ((PL_origargv[i] == s + 1
1535 || PL_origargv[i] == s + 2
1540 (PL_origargv[i] > s &&
1542 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1552 /* Can we grab env area too to be used as the area for $0? */
1553 if (s && PL_origenviron) {
1554 if ((PL_origenviron[0] == s + 1)
1557 (PL_origenviron[0] > s &&
1558 PL_origenviron[0] <=
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1562 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1563 s = PL_origenviron[0];
1566 my_setenv("NoNe SuCh", NULL);
1567 /* Force copy of environment. */
1568 for (i = 1; PL_origenviron[i]; i++) {
1569 if (PL_origenviron[i] == s + 1
1572 (PL_origenviron[i] > s &&
1573 PL_origenviron[i] <=
1574 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 s = PL_origenviron[i];
1585 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1590 /* Come here if running an undumped a.out. */
1592 PL_origfilename = savepv(argv[0]);
1593 PL_do_undump = FALSE;
1594 cxstack_ix = -1; /* start label stack again */
1596 assert (!PL_tainted);
1598 S_set_caret_X(aTHX);
1600 init_postdump_symbols(argc,argv,env);
1605 op_free(PL_main_root);
1606 PL_main_root = NULL;
1608 PL_main_start = NULL;
1609 SvREFCNT_dec(PL_main_cv);
1613 oldscope = PL_scopestack_ix;
1614 PL_dowarn = G_WARN_OFF;
1619 parse_body(env,xsinit);
1621 call_list(oldscope, PL_unitcheckav);
1623 call_list(oldscope, PL_checkav);
1630 /* my_exit() was called */
1631 while (PL_scopestack_ix > oldscope)
1634 PL_curstash = PL_defstash;
1636 call_list(oldscope, PL_unitcheckav);
1638 call_list(oldscope, PL_checkav);
1642 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1651 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1654 int argc = PL_origargc;
1655 char **argv = PL_origargv;
1656 const char *scriptname = NULL;
1657 VOL bool dosearch = FALSE;
1658 const char *validarg = "";
1660 register char *s, c;
1661 const char *cddir = NULL;
1662 #ifdef USE_SITECUSTOMIZE
1663 bool minus_f = FALSE;
1666 sv_setpvn(PL_linestr,"",0);
1667 sv = newSVpvs(""); /* first used for -I flags */
1671 for (argc--,argv++; argc > 0; argc--,argv++) {
1672 if (argv[0][0] != '-' || !argv[0][1])
1676 validarg = " PHOOEY ";
1680 * Can we rely on the kernel to start scripts with argv[1] set to
1681 * contain all #! line switches (the whole line)? (argv[0] is set to
1682 * the interpreter name, argv[2] to the script name; argv[3] and
1683 * above may contain other arguments.)
1690 #ifndef PERL_STRICT_CR
1715 if ((s = moreswitches(s)))
1720 CHECK_MALLOC_TOO_LATE_FOR('t');
1721 if( !PL_tainting ) {
1722 PL_taint_warn = TRUE;
1728 CHECK_MALLOC_TOO_LATE_FOR('T');
1730 PL_taint_warn = FALSE;
1738 #ifdef MACOS_TRADITIONAL
1739 /* ignore -e for Dev:Pseudo argument */
1740 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1743 forbid_setid('e', -1);
1745 PL_e_script = newSVpvs("");
1746 filter_add(read_e_script, NULL);
1749 sv_catpv(PL_e_script, s);
1751 sv_catpv(PL_e_script, argv[1]);
1755 Perl_croak(aTHX_ "No code specified for -%c", c);
1756 sv_catpvs(PL_e_script, "\n");
1760 #ifdef USE_SITECUSTOMIZE
1766 case 'I': /* -I handled both here and in moreswitches() */
1767 forbid_setid('I', -1);
1768 if (!*++s && (s=argv[1]) != NULL) {
1772 STRLEN len = strlen(s);
1773 const char * const p = savepvn(s, len);
1774 incpush(p, TRUE, TRUE, FALSE, FALSE);
1775 sv_catpvs(sv, "-I");
1776 sv_catpvn(sv, p, len);
1781 Perl_croak(aTHX_ "No directory specified for -I");
1784 forbid_setid('P', -1);
1785 PL_preprocess = TRUE;
1789 forbid_setid('S', -1);
1798 PL_preambleav = newAV();
1799 av_push(PL_preambleav,
1800 newSVpvs("use Config;"));
1804 opts_prog = newSVpvs("print Config::myconfig(),");
1806 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1810 opts = SvCUR(opts_prog);
1812 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1816 # ifdef DEBUG_LEAKING_SCALARS
1817 " DEBUG_LEAKING_SCALARS"
1819 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1820 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1822 # ifdef FAKE_THREADS
1825 # ifdef MULTIPLICITY
1834 # ifdef PERL_DONT_CREATE_GVSV
1835 " PERL_DONT_CREATE_GVSV"
1837 # ifdef PERL_GLOBAL_STRUCT
1838 " PERL_GLOBAL_STRUCT"
1840 # ifdef PERL_IMPLICIT_CONTEXT
1841 " PERL_IMPLICIT_CONTEXT"
1843 # ifdef PERL_IMPLICIT_SYS
1844 " PERL_IMPLICIT_SYS"
1849 # ifdef PERL_MALLOC_WRAP
1852 # ifdef PERL_NEED_APPCTX
1855 # ifdef PERL_NEED_TIMESBASE
1856 " PERL_NEED_TIMESBASE"
1858 # ifdef PERL_OLD_COPY_ON_WRITE
1859 " PERL_OLD_COPY_ON_WRITE"
1861 # ifdef PERL_TRACK_MEMPOOL
1862 " PERL_TRACK_MEMPOOL"
1864 # ifdef PERL_USE_SAFE_PUTENV
1865 " PERL_USE_SAFE_PUTENV"
1867 #ifdef PERL_USES_PL_PIDSTATUS
1868 " PERL_USES_PL_PIDSTATUS"
1870 # ifdef PL_OP_SLAB_ALLOC
1873 # ifdef THREADS_HAVE_PIDS
1874 " THREADS_HAVE_PIDS"
1876 # ifdef USE_64_BIT_ALL
1879 # ifdef USE_64_BIT_INT
1882 # ifdef USE_ITHREADS
1885 # ifdef USE_LARGE_FILES
1888 # ifdef USE_LONG_DOUBLE
1894 # ifdef USE_REENTRANT_API
1895 " USE_REENTRANT_API"
1900 # ifdef USE_SITECUSTOMIZE
1901 " USE_SITECUSTOMIZE"
1908 while (SvCUR(opts_prog) > opts+76) {
1909 /* find last space after "options: " and before col 76
1913 char * const pv = SvPV_nolen(opts_prog);
1914 const char c = pv[opts+76];
1916 space = strrchr(pv+opts+26, ' ');
1918 if (!space) break; /* "Can't happen" */
1920 /* break the line before that space */
1923 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1924 STR_WITH_LEN("\\n "));
1927 sv_catpvs(opts_prog,"\\n\",");
1929 #if defined(LOCAL_PATCH_COUNT)
1930 if (LOCAL_PATCH_COUNT > 0) {
1932 sv_catpvs(opts_prog,
1933 "\" Locally applied patches:\\n\",");
1934 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1935 if (PL_localpatches[i])
1936 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1937 0, PL_localpatches[i], 0);
1941 Perl_sv_catpvf(aTHX_ opts_prog,
1942 "\" Built under %s\\n\"",OSNAME);
1945 Perl_sv_catpvf(aTHX_ opts_prog,
1946 ",\" Compiled at %s %s\\n\"",__DATE__,
1949 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1953 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1954 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1955 "sort grep {/^PERL/} keys %ENV; ");
1957 sv_catpvs(opts_prog,
1958 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1960 sv_catpvs(opts_prog,
1961 "print \" \\%ENV:\\n @env\\n\" if @env;"
1962 "print \" \\@INC:\\n @INC\\n\";");
1966 opts_prog = Perl_newSVpvf(aTHX_
1967 "Config::config_vars(qw%c%s%c)",
1971 av_push(PL_preambleav, opts_prog);
1972 /* don't look for script or read stdin */
1973 scriptname = BIT_BUCKET;
1977 PL_doextract = TRUE;
1985 if (!*++s || isSPACE(*s)) {
1989 /* catch use of gnu style long options */
1990 if (strEQ(s, "version")) {
1994 if (strEQ(s, "help")) {
2001 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2007 #ifndef SECURE_INTERNAL_GETENV
2010 (s = PerlEnv_getenv("PERL5OPT")))
2012 const char *popt = s;
2015 if (*s == '-' && *(s+1) == 'T') {
2016 CHECK_MALLOC_TOO_LATE_FOR('T');
2018 PL_taint_warn = FALSE;
2021 char *popt_copy = NULL;
2034 if (!strchr("CDIMUdmtwA", *s))
2035 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2039 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2040 s = popt_copy + (s - popt);
2041 d = popt_copy + (d - popt);
2048 if( !PL_tainting ) {
2049 PL_taint_warn = TRUE;
2059 #ifdef USE_SITECUSTOMIZE
2062 PL_preambleav = newAV();
2063 av_unshift(PL_preambleav, 1);
2064 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2069 scriptname = argv[0];
2072 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2074 else if (scriptname == NULL) {
2076 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2082 /* Set $^X early so that it can be used for relocatable paths in @INC */
2083 assert (!PL_tainted);
2085 S_set_caret_X(aTHX);
2092 = open_script(scriptname, dosearch, sv, &suidscript);
2094 validate_suid(validarg, scriptname, fdscript, suidscript);
2097 # if defined(SIGCHLD) || defined(SIGCLD)
2100 # define SIGCHLD SIGCLD
2102 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2103 if (sigstate == (Sighandler_t) SIG_IGN) {
2104 if (ckWARN(WARN_SIGNAL))
2105 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2106 "Can't ignore signal CHLD, forcing to default");
2107 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2114 #ifdef MACOS_TRADITIONAL
2115 || gMacPerl_AlwaysExtract
2119 /* This will croak if suidscript is >= 0, as -x cannot be used with
2121 forbid_setid('x', suidscript);
2122 /* Hence you can't get here if suidscript >= 0 */
2125 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2126 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2130 PL_main_cv = PL_compcv = (CV*)newSV(0);
2131 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2132 CvUNIQUE_on(PL_compcv);
2134 CvPADLIST(PL_compcv) = pad_new(0);
2137 boot_core_UNIVERSAL();
2138 boot_core_xsutils();
2141 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2143 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2149 # ifdef HAS_SOCKS5_INIT
2150 socks5_init(argv[0]);
2156 init_predump_symbols();
2157 /* init_postdump_symbols not currently designed to be called */
2158 /* more than once (ENV isn't cleared first, for example) */
2159 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2161 init_postdump_symbols(argc,argv,env);
2163 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2164 * or explicitly in some platforms.
2165 * locale.c:Perl_init_i18nl10n() if the environment
2166 * look like the user wants to use UTF-8. */
2167 #if defined(__SYMBIAN32__)
2168 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2171 /* Requires init_predump_symbols(). */
2172 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2177 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2178 * and the default open disciplines. */
2179 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2180 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2182 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2183 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2184 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2186 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2187 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2188 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2190 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2191 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2192 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2194 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2195 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2198 sv_setpvn(sv, ":utf8\0:utf8", 11);
2200 sv_setpvn(sv, ":utf8\0", 6);
2203 sv_setpvn(sv, "\0:utf8", 6);
2209 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2210 if (strEQ(s, "unsafe"))
2211 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2212 else if (strEQ(s, "safe"))
2213 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2215 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2219 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2223 PL_xmlfp = PerlIO_stdout();
2225 PL_xmlfp = PerlIO_open(s, "w");
2227 Perl_croak(aTHX_ "Can't open %s", s);
2229 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2231 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2232 PL_madskills = atoi(s);
2233 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2239 /* now parse the script */
2241 SETERRNO(0,SS_NORMAL);
2243 #ifdef MACOS_TRADITIONAL
2244 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2246 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2248 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2249 MacPerl_MPWFileName(PL_origfilename));
2253 if (yyparse() || PL_error_count) {
2255 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2257 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2262 CopLINE_set(PL_curcop, 0);
2263 PL_curstash = PL_defstash;
2264 PL_preprocess = FALSE;
2266 SvREFCNT_dec(PL_e_script);
2274 SAVECOPFILE(PL_curcop);
2275 SAVECOPLINE(PL_curcop);
2276 gv_check(PL_defstash);
2283 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2284 dump_mstats("after compilation:");
2293 =for apidoc perl_run
2295 Tells a Perl interpreter to run. See L<perlembed>.
2308 PERL_UNUSED_ARG(my_perl);
2310 oldscope = PL_scopestack_ix;
2318 cxstack_ix = -1; /* start context stack again */
2320 case 0: /* normal completion */
2324 case 2: /* my_exit() */
2325 while (PL_scopestack_ix > oldscope)
2328 PL_curstash = PL_defstash;
2329 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2330 PL_endav && !PL_minus_c)
2331 call_list(oldscope, PL_endav);
2333 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2334 dump_mstats("after execution: ");
2340 POPSTACK_TO(PL_mainstack);
2343 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2355 S_run_body(pTHX_ I32 oldscope)
2358 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2359 PL_sawampersand ? "Enabling" : "Omitting"));
2361 if (!PL_restartop) {
2365 exit(0); /* less likely to core dump than my_exit(0) */
2368 DEBUG_x(dump_all());
2371 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2373 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2377 #ifdef MACOS_TRADITIONAL
2378 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2379 (gMacPerl_ErrorFormat ? "# " : ""),
2380 MacPerl_MPWFileName(PL_origfilename));
2382 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2386 if (PERLDB_SINGLE && PL_DBsingle)
2387 sv_setiv(PL_DBsingle, 1);
2389 call_list(oldscope, PL_initav);
2395 PL_op = PL_restartop;
2399 else if (PL_main_start) {
2400 CvDEPTH(PL_main_cv) = 1;
2401 PL_op = PL_main_start;
2409 =head1 SV Manipulation Functions
2411 =for apidoc p||get_sv
2413 Returns the SV of the specified Perl scalar. If C<create> is set and the
2414 Perl variable does not exist then it will be created. If C<create> is not
2415 set and the variable does not exist then NULL is returned.
2421 Perl_get_sv(pTHX_ const char *name, I32 create)
2424 gv = gv_fetchpv(name, create, SVt_PV);
2431 =head1 Array Manipulation Functions
2433 =for apidoc p||get_av
2435 Returns the AV of the specified Perl array. If C<create> is set and the
2436 Perl variable does not exist then it will be created. If C<create> is not
2437 set and the variable does not exist then NULL is returned.
2443 Perl_get_av(pTHX_ const char *name, I32 create)
2445 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2454 =head1 Hash Manipulation Functions
2456 =for apidoc p||get_hv
2458 Returns the HV of the specified Perl hash. If C<create> is set and the
2459 Perl variable does not exist then it will be created. If C<create> is not
2460 set and the variable does not exist then NULL is returned.
2466 Perl_get_hv(pTHX_ const char *name, I32 create)
2468 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2477 =head1 CV Manipulation Functions
2479 =for apidoc p||get_cvn_flags
2481 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2482 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2483 exist then it will be declared (which has the same effect as saying
2484 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2485 then NULL is returned.
2487 =for apidoc p||get_cv
2489 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2495 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2497 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2498 /* XXX unsafe for threads if eval_owner isn't held */
2499 /* XXX this is probably not what they think they're getting.
2500 * It has the same effect as "sub name;", i.e. just a forward
2502 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2503 SV *const sv = newSVpvn(name,len);
2504 SvFLAGS(sv) |= flags & SVf_UTF8;
2505 return newSUB(start_subparse(FALSE, 0),
2506 newSVOP(OP_CONST, 0, sv),
2515 Perl_get_cv(pTHX_ const char *name, I32 flags)
2517 return get_cvn_flags(name, strlen(name), flags);
2520 /* Be sure to refetch the stack pointer after calling these routines. */
2524 =head1 Callback Functions
2526 =for apidoc p||call_argv
2528 Performs a callback to the specified Perl sub. See L<perlcall>.
2534 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2536 /* See G_* flags in cop.h */
2537 /* null terminated arg list */
2545 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2550 return call_pv(sub_name, flags);
2554 =for apidoc p||call_pv
2556 Performs a callback to the specified Perl sub. See L<perlcall>.
2562 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2563 /* name of the subroutine */
2564 /* See G_* flags in cop.h */
2566 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2570 =for apidoc p||call_method
2572 Performs a callback to the specified Perl method. The blessed object must
2573 be on the stack. See L<perlcall>.
2579 Perl_call_method(pTHX_ const char *methname, I32 flags)
2580 /* name of the subroutine */
2581 /* See G_* flags in cop.h */
2583 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2586 /* May be called with any of a CV, a GV, or an SV containing the name. */
2588 =for apidoc p||call_sv
2590 Performs a callback to the Perl sub whose name is in the SV. See
2597 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2598 /* See G_* flags in cop.h */
2601 LOGOP myop; /* fake syntax tree node */
2606 bool oldcatch = CATCH_GET;
2608 OP* const oldop = PL_op;
2611 if (flags & G_DISCARD) {
2616 Zero(&myop, 1, LOGOP);
2617 myop.op_next = NULL;
2618 if (!(flags & G_NOARGS))
2619 myop.op_flags |= OPf_STACKED;
2620 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2621 (flags & G_ARRAY) ? OPf_WANT_LIST :
2626 EXTEND(PL_stack_sp, 1);
2627 *++PL_stack_sp = sv;
2629 oldscope = PL_scopestack_ix;
2631 if (PERLDB_SUB && PL_curstash != PL_debstash
2632 /* Handle first BEGIN of -d. */
2633 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2634 /* Try harder, since this may have been a sighandler, thus
2635 * curstash may be meaningless. */
2636 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2637 && !(flags & G_NODEBUG))
2638 PL_op->op_private |= OPpENTERSUB_DB;
2640 if (flags & G_METHOD) {
2641 Zero(&method_op, 1, UNOP);
2642 method_op.op_next = PL_op;
2643 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2644 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2645 PL_op = (OP*)&method_op;
2648 if (!(flags & G_EVAL)) {
2650 CALL_BODY_SUB((OP*)&myop);
2651 retval = PL_stack_sp - (PL_stack_base + oldmark);
2652 CATCH_SET(oldcatch);
2655 myop.op_other = (OP*)&myop;
2657 create_eval_scope(flags|G_FAKINGEVAL);
2665 CALL_BODY_SUB((OP*)&myop);
2666 retval = PL_stack_sp - (PL_stack_base + oldmark);
2667 if (!(flags & G_KEEPERR))
2668 sv_setpvn(ERRSV,"",0);
2674 /* my_exit() was called */
2675 PL_curstash = PL_defstash;
2678 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2679 Perl_croak(aTHX_ "Callback called exit");
2684 PL_op = PL_restartop;
2688 PL_stack_sp = PL_stack_base + oldmark;
2689 if (flags & G_ARRAY)
2693 *++PL_stack_sp = &PL_sv_undef;
2698 if (PL_scopestack_ix > oldscope)
2699 delete_eval_scope();
2703 if (flags & G_DISCARD) {
2704 PL_stack_sp = PL_stack_base + oldmark;
2713 /* Eval a string. The G_EVAL flag is always assumed. */
2716 =for apidoc p||eval_sv
2718 Tells Perl to C<eval> the string in the SV.
2724 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2726 /* See G_* flags in cop.h */
2730 UNOP myop; /* fake syntax tree node */
2731 VOL I32 oldmark = SP - PL_stack_base;
2734 OP* const oldop = PL_op;
2737 if (flags & G_DISCARD) {
2744 Zero(PL_op, 1, UNOP);
2745 EXTEND(PL_stack_sp, 1);
2746 *++PL_stack_sp = sv;
2748 if (!(flags & G_NOARGS))
2749 myop.op_flags = OPf_STACKED;
2750 myop.op_next = NULL;
2751 myop.op_type = OP_ENTEREVAL;
2752 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2753 (flags & G_ARRAY) ? OPf_WANT_LIST :
2755 if (flags & G_KEEPERR)
2756 myop.op_flags |= OPf_SPECIAL;
2758 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2759 * before a PUSHEVAL, which corrupts the stack after a croak */
2760 TAINT_PROPER("eval_sv()");
2766 CALL_BODY_EVAL((OP*)&myop);
2767 retval = PL_stack_sp - (PL_stack_base + oldmark);
2768 if (!(flags & G_KEEPERR))
2769 sv_setpvn(ERRSV,"",0);
2775 /* my_exit() was called */
2776 PL_curstash = PL_defstash;
2779 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2780 Perl_croak(aTHX_ "Callback called exit");
2785 PL_op = PL_restartop;
2789 PL_stack_sp = PL_stack_base + oldmark;
2790 if (flags & G_ARRAY)
2794 *++PL_stack_sp = &PL_sv_undef;
2800 if (flags & G_DISCARD) {
2801 PL_stack_sp = PL_stack_base + oldmark;
2811 =for apidoc p||eval_pv
2813 Tells Perl to C<eval> the given string and return an SV* result.
2819 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2823 SV* sv = newSVpv(p, 0);
2825 eval_sv(sv, G_SCALAR);
2832 if (croak_on_error && SvTRUE(ERRSV)) {
2833 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2839 /* Require a module. */
2842 =head1 Embedding Functions
2844 =for apidoc p||require_pv
2846 Tells Perl to C<require> the file named by the string argument. It is
2847 analogous to the Perl code C<eval "require '$file'">. It's even
2848 implemented that way; consider using load_module instead.
2853 Perl_require_pv(pTHX_ const char *pv)
2858 PUSHSTACKi(PERLSI_REQUIRE);
2860 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2861 eval_sv(sv_2mortal(sv), G_DISCARD);
2867 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2869 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2872 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2876 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2878 /* This message really ought to be max 23 lines.
2879 * Removed -h because the user already knows that option. Others? */
2881 static const char * const usage_msg[] = {
2882 "-0[octal] specify record separator (\\0, if no argument)",
2883 "-A[mod][=pattern] activate all/given assertions",
2884 "-a autosplit mode with -n or -p (splits $_ into @F)",
2885 "-C[number/list] enables the listed Unicode features",
2886 "-c check syntax only (runs BEGIN and CHECK blocks)",
2887 "-d[:debugger] run program under debugger",
2888 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2889 "-e program one line of program (several -e's allowed, omit programfile)",
2890 "-E program like -e, but enables all optional features",
2891 "-f don't do $sitelib/sitecustomize.pl at startup",
2892 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2893 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2894 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2895 "-l[octal] enable line ending processing, specifies line terminator",
2896 "-[mM][-]module execute \"use/no module...\" before executing program",
2897 "-n assume \"while (<>) { ... }\" loop around program",
2898 "-p assume loop like -n but print line also, like sed",
2899 "-P run program through C preprocessor before compilation",
2900 "-s enable rudimentary parsing for switches after programfile",
2901 "-S look for programfile using PATH environment variable",
2902 "-t enable tainting warnings",
2903 "-T enable tainting checks",
2904 "-u dump core after parsing program",
2905 "-U allow unsafe operations",
2906 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2907 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2908 "-w enable many useful warnings (RECOMMENDED)",
2909 "-W enable all warnings",
2910 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2911 "-X disable all warnings",
2915 const char * const *p = usage_msg;
2917 PerlIO_printf(PerlIO_stdout(),
2918 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2921 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2924 /* convert a string of -D options (or digits) into an int.
2925 * sets *s to point to the char after the options */
2929 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2931 static const char * const usage_msgd[] = {
2932 " Debugging flag values: (see also -d)",
2933 " p Tokenizing and parsing (with v, displays parse stack)",
2934 " s Stack snapshots (with v, displays all stacks)",
2935 " l Context (loop) stack processing",
2936 " t Trace execution",
2937 " o Method and overloading resolution",
2938 " c String/numeric conversions",
2939 " P Print profiling info, preprocessor command for -P, source file input state",
2940 " m Memory allocation",
2941 " f Format processing",
2942 " r Regular expression parsing and execution",
2943 " x Syntax tree dump",
2944 " u Tainting checks",
2945 " H Hash dump -- usurps values()",
2946 " X Scratchpad allocation",
2948 " S Thread synchronization",
2950 " R Include reference counts of dumped variables (eg when using -Ds)",
2951 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2952 " v Verbose: use in conjunction with other flags",
2954 " A Consistency checks on internal structures",
2955 " q quiet - currently only suppresses the 'EXECUTING' message",
2960 /* if adding extra options, remember to update DEBUG_MASK */
2961 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2963 for (; isALNUM(**s); (*s)++) {
2964 const char * const d = strchr(debopts,**s);
2966 i |= 1 << (d - debopts);
2967 else if (ckWARN_d(WARN_DEBUGGING))
2968 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2969 "invalid option -D%c, use -D'' to see choices\n", **s);
2972 else if (isDIGIT(**s)) {
2974 for (; isALNUM(**s); (*s)++) ;
2976 else if (givehelp) {
2977 const char *const *p = usage_msgd;
2978 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2981 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2982 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2983 "-Dp not implemented on this platform\n");
2989 /* This routine handles any switches that can be given during run */
2992 Perl_moreswitches(pTHX_ char *s)
3003 SvREFCNT_dec(PL_rs);
3004 if (s[1] == 'x' && s[2]) {
3005 const char *e = s+=2;
3011 flags = PERL_SCAN_SILENT_ILLDIGIT;
3012 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3013 if (s + numlen < e) {
3014 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3018 PL_rs = newSVpvs("");
3019 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3020 tmps = (U8*)SvPVX(PL_rs);
3021 uvchr_to_utf8(tmps, rschar);
3022 SvCUR_set(PL_rs, UNISKIP(rschar));
3027 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3028 if (rschar & ~((U8)~0))
3029 PL_rs = &PL_sv_undef;
3030 else if (!rschar && numlen >= 2)
3031 PL_rs = newSVpvs("");
3033 char ch = (char)rschar;
3034 PL_rs = newSVpvn(&ch, 1);
3037 sv_setsv(get_sv("/", TRUE), PL_rs);
3042 PL_unicode = parse_unicode_opts( (const char **)&s );
3043 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3049 while (*s && !isSPACE(*s)) ++s;
3050 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3061 forbid_setid('d', -1);
3064 /* -dt indicates to the debugger that threads will be used */
3065 if (*s == 't' && !isALNUM(s[1])) {
3067 my_setenv("PERL5DB_THREADED", "1");
3070 /* The following permits -d:Mod to accepts arguments following an =
3071 in the fashion that -MSome::Mod does. */
3072 if (*s == ':' || *s == '=') {
3074 SV * const sv = newSVpvs("use Devel::");
3076 /* We now allow -d:Module=Foo,Bar */
3077 while(isALNUM(*s) || *s==':') ++s;
3079 sv_catpv(sv, start);
3081 sv_catpvn(sv, start, s-start);
3082 /* Don't use NUL as q// delimiter here, this string goes in the
3084 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3087 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3090 PL_perldb = PERLDB_ALL;
3097 forbid_setid('D', -1);
3099 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3100 #else /* !DEBUGGING */
3101 if (ckWARN_d(WARN_DEBUGGING))
3102 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3103 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3104 for (s++; isALNUM(*s); s++) ;
3109 usage(PL_origargv[0]);
3112 Safefree(PL_inplace);
3113 #if defined(__CYGWIN__) /* do backup extension automagically */
3114 if (*(s+1) == '\0') {
3115 PL_inplace = savepvs(".bak");
3118 #endif /* __CYGWIN__ */
3120 const char * const start = ++s;
3121 while (*s && !isSPACE(*s))
3124 PL_inplace = savepvn(start, s - start);
3128 if (*s == '-') /* Additional switches on #! line. */
3132 case 'I': /* -I handled both here and in parse_body() */
3133 forbid_setid('I', -1);
3135 while (*s && isSPACE(*s))
3140 /* ignore trailing spaces (possibly followed by other switches) */
3142 for (e = p; *e && !isSPACE(*e); e++) ;
3146 } while (*p && *p != '-');
3147 e = savepvn(s, e-s);
3148 incpush(e, TRUE, TRUE, FALSE, FALSE);
3155 Perl_croak(aTHX_ "No directory specified for -I");
3161 SvREFCNT_dec(PL_ors_sv);
3167 PL_ors_sv = newSVpvs("\n");
3168 numlen = 3 + (*s == '0');
3169 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3173 if (RsPARA(PL_rs)) {
3174 PL_ors_sv = newSVpvs("\n\n");
3177 PL_ors_sv = newSVsv(PL_rs);
3182 forbid_setid('A', -1);
3184 PL_preambleav = newAV();
3187 char * const start = s;
3188 SV * const sv = newSVpvs("use assertions::activate");
3189 while(isALNUM(*s) || *s == ':') ++s;
3191 sv_catpvs(sv, "::");
3192 sv_catpvn(sv, start, s-start);
3195 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3198 else if (*s != '\0') {
3199 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3201 av_push(PL_preambleav, sv);
3205 forbid_setid('M', -1); /* XXX ? */
3208 forbid_setid('m', -1); /* XXX ? */
3212 const char *use = "use ";
3213 /* -M-foo == 'no foo' */
3214 /* Leading space on " no " is deliberate, to make both
3215 possibilities the same length. */
3216 if (*s == '-') { use = " no "; ++s; }
3217 sv = newSVpvn(use,4);
3219 /* We allow -M'Module qw(Foo Bar)' */
3220 while(isALNUM(*s) || *s==':') ++s;
3222 sv_catpv(sv, start);
3223 if (*(start-1) == 'm') {
3225 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3226 sv_catpvs( sv, " ()");
3230 Perl_croak(aTHX_ "Module name required with -%c option",
3232 sv_catpvn(sv, start, s-start);
3233 sv_catpvs(sv, " split(/,/,q");
3234 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3236 sv_catpvs(sv, "\0)");
3240 PL_preambleav = newAV();
3241 av_push(PL_preambleav, sv);
3244 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3255 forbid_setid('s', -1);
3256 PL_doswitches = TRUE;
3270 #ifdef MACOS_TRADITIONAL
3271 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3273 PL_do_undump = TRUE;
3281 if (!sv_derived_from(PL_patchlevel, "version"))
3282 upg_version(PL_patchlevel);
3284 PerlIO_printf(PerlIO_stdout(),
3285 Perl_form(aTHX_ "\nThis is perl, %"SVf
3286 #ifdef PERL_PATCHNUM
3287 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3290 SVfARG(vstringify(PL_patchlevel)),
3293 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3294 PerlIO_printf(PerlIO_stdout(),
3295 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3296 SVfARG(vstringify(PL_patchlevel))));
3297 PerlIO_printf(PerlIO_stdout(),
3298 Perl_form(aTHX_ " built under %s at %s %s\n",
3299 OSNAME, __DATE__, __TIME__));
3300 PerlIO_printf(PerlIO_stdout(),
3301 Perl_form(aTHX_ " OS Specific Release: %s\n",
3305 #if defined(LOCAL_PATCH_COUNT)
3306 if (LOCAL_PATCH_COUNT > 0)
3307 PerlIO_printf(PerlIO_stdout(),
3308 "\n(with %d registered patch%s, "
3309 "see perl -V for more detail)",
3311 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "\n\nCopyright 1987-2007, Larry Wall\n");
3316 #ifdef MACOS_TRADITIONAL
3317 PerlIO_printf(PerlIO_stdout(),
3318 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3319 "maintained by Chris Nandor\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3326 PerlIO_printf(PerlIO_stdout(),
3327 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3328 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3333 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "atariST series port, ++jrb bammi@cadence.com\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3344 PerlIO_printf(PerlIO_stdout(),
3345 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3348 PerlIO_printf(PerlIO_stdout(),
3349 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3352 PerlIO_printf(PerlIO_stdout(),
3353 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "MiNT port by Guido Flohr, 1997-1999\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "EPOC port by Olaf Flebbe, 1999-2002\n");
3372 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3373 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3376 #ifdef __SYMBIAN32__
3377 PerlIO_printf(PerlIO_stdout(),
3378 "Symbian port by Nokia, 2004-2005\n");
3380 #ifdef BINARY_BUILD_NOTICE
3381 BINARY_BUILD_NOTICE;
3383 PerlIO_printf(PerlIO_stdout(),
3385 Perl may be copied only under the terms of either the Artistic License or the\n\
3386 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3387 Complete documentation for Perl, including FAQ lists, should be found on\n\
3388 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3389 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3392 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3393 PL_dowarn |= G_WARN_ON;
3398 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3399 if (!specialWARN(PL_compiling.cop_warnings))
3400 PerlMemShared_free(PL_compiling.cop_warnings);
3401 PL_compiling.cop_warnings = pWARN_ALL ;
3405 PL_dowarn = G_WARN_ALL_OFF;
3406 if (!specialWARN(PL_compiling.cop_warnings))
3407 PerlMemShared_free(PL_compiling.cop_warnings);
3408 PL_compiling.cop_warnings = pWARN_NONE ;
3413 if (s[1] == '-') /* Additional switches on #! line. */
3418 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3424 #ifdef ALTERNATE_SHEBANG
3425 case 'S': /* OS/2 needs -S on "extproc" line. */
3433 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3438 /* compliments of Tom Christiansen */
3440 /* unexec() can be found in the Gnu emacs distribution */
3441 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3444 Perl_my_unexec(pTHX)
3446 PERL_UNUSED_CONTEXT;
3448 SV * prog = newSVpv(BIN_EXP, 0);
3449 SV * file = newSVpv(PL_origfilename, 0);
3453 sv_catpvs(prog, "/perl");
3454 sv_catpvs(file, ".perldump");
3456 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3457 /* unexec prints msg to stderr in case of failure */
3458 PerlProc_exit(status);
3461 # include <lib$routines.h>
3462 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3463 # elif defined(WIN32) || defined(__CYGWIN__)
3464 Perl_croak(aTHX_ "dump is not supported");
3466 ABORT(); /* for use with undump */
3471 /* initialize curinterp */
3477 # define PERLVAR(var,type)
3478 # define PERLVARA(var,n,type)
3479 # if defined(PERL_IMPLICIT_CONTEXT)
3480 # define PERLVARI(var,type,init) aTHX->var = init;
3481 # define PERLVARIC(var,type,init) aTHX->var = init;
3483 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3484 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3486 # include "intrpvar.h"
3487 # include "thrdvar.h"
3493 # define PERLVAR(var,type)
3494 # define PERLVARA(var,n,type)
3495 # define PERLVARI(var,type,init) PL_##var = init;
3496 # define PERLVARIC(var,type,init) PL_##var = init;
3497 # include "intrpvar.h"
3498 # include "thrdvar.h"
3505 /* As these are inside a structure, PERLVARI isn't capable of initialising
3507 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3508 PL_reg_poscache = PL_reg_starttry = NULL;
3512 S_init_main_stash(pTHX)
3517 PL_curstash = PL_defstash = newHV();
3518 /* We know that the string "main" will be in the global shared string
3519 table, so it's a small saving to use it rather than allocate another
3521 PL_curstname = newSVpvs_share("main");
3522 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3523 /* If we hadn't caused another reference to "main" to be in the shared
3524 string table above, then it would be worth reordering these two,
3525 because otherwise all we do is delete "main" from it as a consequence
3526 of the SvREFCNT_dec, only to add it again with hv_name_set */
3527 SvREFCNT_dec(GvHV(gv));
3528 hv_name_set(PL_defstash, "main", 4, 0);
3529 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3531 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3533 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3534 GvMULTI_on(PL_incgv);
3535 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3536 GvMULTI_on(PL_hintgv);
3537 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3538 SvREFCNT_inc_simple(PL_defgv);
3539 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3540 SvREFCNT_inc_simple(PL_errgv);
3541 GvMULTI_on(PL_errgv);
3542 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3543 GvMULTI_on(PL_replgv);
3544 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3545 #ifdef PERL_DONT_CREATE_GVSV
3548 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3549 sv_setpvn(ERRSV, "", 0);
3550 PL_curstash = PL_defstash;
3551 CopSTASH_set(&PL_compiling, PL_defstash);
3552 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3553 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3555 /* We must init $/ before switches are processed. */
3556 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3560 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3566 const char *cpp_discard_flag;
3575 PL_origfilename = savepvs("-e");
3578 /* if find_script() returns, it returns a malloc()-ed value */
3579 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3581 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3582 const char *s = scriptname + 8;
3588 * Tell apart "normal" usage of fdscript, e.g.
3589 * with bash on FreeBSD:
3590 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3591 * from usage in suidperl.
3592 * Does any "normal" usage leave garbage after the number???
3593 * Is it a mistake to use a similar /dev/fd/ construct for
3598 * Be supersafe and do some sanity-checks.
3599 * Still, can we be sure we got the right thing?
3602 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3605 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3607 scriptname = savepv(s + 1);
3608 Safefree(PL_origfilename);
3609 PL_origfilename = (char *)scriptname;
3614 CopFILE_free(PL_curcop);
3615 CopFILE_set(PL_curcop, PL_origfilename);
3616 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3617 scriptname = (char *)"";
3618 if (fdscript >= 0) {
3619 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3620 # if defined(HAS_FCNTL) && defined(F_SETFD)
3622 /* ensure close-on-exec */
3623 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3628 Perl_croak(aTHX_ "sperl needs fd script\n"
3629 "You should not call sperl directly; do you need to "
3630 "change a #! line\nfrom sperl to perl?\n");
3633 * Do not open (or do other fancy stuff) while setuid.
3634 * Perl does the open, and hands script to suidperl on a fd;
3635 * suidperl only does some checks, sets up UIDs and re-execs
3636 * perl with that fd as it has always done.
3639 if (*suidscript != 1) {
3640 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3643 else if (PL_preprocess) {
3644 const char * const cpp_cfg = CPPSTDIN;
3645 SV * const cpp = newSVpvs("");
3646 SV * const cmd = newSV(0);
3648 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3649 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3650 if (strEQ(cpp_cfg, "cppstdin"))
3651 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3652 sv_catpv(cpp, cpp_cfg);
3655 sv_catpvs(sv, "-I");
3656 sv_catpv(sv,PRIVLIB_EXP);
3659 DEBUG_P(PerlIO_printf(Perl_debug_log,
3660 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3661 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3664 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3671 cpp_discard_flag = "";
3673 cpp_discard_flag = "-C";
3677 perl = os2_execname(aTHX);
3679 perl = PL_origargv[0];
3683 /* This strips off Perl comments which might interfere with
3684 the C pre-processor, including #!. #line directives are
3685 deliberately stripped to avoid confusion with Perl's version
3686 of #line. FWP played some golf with it so it will fit
3687 into VMS's 255 character buffer.
3690 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3692 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3694 Perl_sv_setpvf(aTHX_ cmd, "\
3695 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3696 perl, quote, code, quote, scriptname, SVfARG(cpp),
3697 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3699 PL_doextract = FALSE;
3701 DEBUG_P(PerlIO_printf(Perl_debug_log,
3702 "PL_preprocess: cmd=\"%s\"\n",
3705 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3709 else if (!*scriptname) {
3710 forbid_setid(0, *suidscript);
3711 PL_rsfp = PerlIO_stdin();
3714 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3715 # if defined(HAS_FCNTL) && defined(F_SETFD)
3717 /* ensure close-on-exec */
3718 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3721 #endif /* IAMSUID */
3723 /* PSz 16 Sep 03 Keep neat error message */
3725 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3727 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3728 CopFILE(PL_curcop), Strerror(errno));
3734 * I_SYSSTATVFS HAS_FSTATVFS
3736 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3737 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3738 * here so that metaconfig picks them up. */
3742 S_fd_on_nosuid_fs(pTHX_ int fd)
3745 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3746 * but is needed also on machines without setreuid.
3747 * Seems safe enough to run as root.
3749 int check_okay = 0; /* able to do all the required sys/libcalls */
3750 int on_nosuid = 0; /* the fd is on a nosuid fs */
3752 * Need to check noexec also: nosuid might not be set, the average
3753 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3755 int on_noexec = 0; /* the fd is on a noexec fs */
3758 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3759 * fstatvfs() is UNIX98.
3760 * fstatfs() is 4.3 BSD.
3761 * ustat()+getmnt() is pre-4.3 BSD.
3762 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3763 * an irrelevant filesystem while trying to reach the right one.
3766 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3768 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3769 defined(HAS_FSTATVFS)
3770 # define FD_ON_NOSUID_CHECK_OKAY
3771 struct statvfs stfs;
3773 check_okay = fstatvfs(fd, &stfs) == 0;
3774 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3776 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3777 on platforms where it is present. */
3778 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3780 # endif /* fstatvfs */
3782 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3783 defined(PERL_MOUNT_NOSUID) && \
3784 defined(PERL_MOUNT_NOEXEC) && \
3785 defined(HAS_FSTATFS) && \
3786 defined(HAS_STRUCT_STATFS) && \
3787 defined(HAS_STRUCT_STATFS_F_FLAGS)
3788 # define FD_ON_NOSUID_CHECK_OKAY
3791 check_okay = fstatfs(fd, &stfs) == 0;
3792 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3793 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3794 # endif /* fstatfs */
3796 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3797 defined(PERL_MOUNT_NOSUID) && \
3798 defined(PERL_MOUNT_NOEXEC) && \
3799 defined(HAS_FSTAT) && \
3800 defined(HAS_USTAT) && \
3801 defined(HAS_GETMNT) && \
3802 defined(HAS_STRUCT_FS_DATA) && \
3804 # define FD_ON_NOSUID_CHECK_OKAY
3807 if (fstat(fd, &fdst) == 0) {
3809 if (ustat(fdst.st_dev, &us) == 0) {
3811 /* NOSTAT_ONE here because we're not examining fields which
3812 * vary between that case and STAT_ONE. */
3813 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3814 size_t cmplen = sizeof(us.f_fname);
3815 if (sizeof(fsd.fd_req.path) < cmplen)
3816 cmplen = sizeof(fsd.fd_req.path);
3817 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3818 fdst.st_dev == fsd.fd_req.dev) {
3820 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3821 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3826 # endif /* fstat+ustat+getmnt */
3828 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3829 defined(HAS_GETMNTENT) && \
3830 defined(HAS_HASMNTOPT) && \
3831 defined(MNTOPT_NOSUID) && \
3832 defined(MNTOPT_NOEXEC)
3833 # define FD_ON_NOSUID_CHECK_OKAY
3834 FILE *mtab = fopen("/etc/mtab", "r");
3835 struct mntent *entry;
3838 if (mtab && (fstat(fd, &stb) == 0)) {
3839 while (entry = getmntent(mtab)) {
3840 if (stat(entry->mnt_dir, &fsb) == 0
3841 && fsb.st_dev == stb.st_dev)
3843 /* found the filesystem */
3845 if (hasmntopt(entry, MNTOPT_NOSUID))
3847 if (hasmntopt(entry, MNTOPT_NOEXEC))
3850 } /* A single fs may well fail its stat(). */
3855 # endif /* getmntent+hasmntopt */
3858 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3860 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3862 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3863 return ((!check_okay) || on_nosuid || on_noexec);
3865 #endif /* IAMSUID */
3868 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3869 int fdscript, int suidscript)
3874 #endif /* IAMSUID */
3876 /* do we need to emulate setuid on scripts? */
3878 /* This code is for those BSD systems that have setuid #! scripts disabled
3879 * in the kernel because of a security problem. Merely defining DOSUID
3880 * in perl will not fix that problem, but if you have disabled setuid
3881 * scripts in the kernel, this will attempt to emulate setuid and setgid
3882 * on scripts that have those now-otherwise-useless bits set. The setuid
3883 * root version must be called suidperl or sperlN.NNN. If regular perl
3884 * discovers that it has opened a setuid script, it calls suidperl with
3885 * the same argv that it had. If suidperl finds that the script it has
3886 * just opened is NOT setuid root, it sets the effective uid back to the
3887 * uid. We don't just make perl setuid root because that loses the
3888 * effective uid we had before invoking perl, if it was different from the
3891 * Description/comments above do not match current workings:
3892 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3893 * suidperl called with script open and name changed to /dev/fd/N/X;
3894 * suidperl croaks if script is not setuid;
3895 * making perl setuid would be a huge security risk (and yes, that
3896 * would lose any euid we might have had).
3898 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3899 * be defined in suidperl only. suidperl must be setuid root. The
3900 * Configure script will set this up for you if you want it.
3906 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3907 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3908 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3910 const char *linestr;
3914 if (fdscript < 0 || suidscript != 1)
3915 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3917 * Since the script is opened by perl, not suidperl, some of these
3918 * checks are superfluous. Leaving them in probably does not lower
3922 * Do checks even for systems with no HAS_SETREUID.
3923 * We used to swap, then re-swap UIDs with
3925 if (setreuid(PL_euid,PL_uid) < 0
3926 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3927 Perl_croak(aTHX_ "Can't swap uid and euid");
3930 if (setreuid(PL_uid,PL_euid) < 0
3931 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3932 Perl_croak(aTHX_ "Can't reswap uid and euid");
3936 /* On this access check to make sure the directories are readable,
3937 * there is actually a small window that the user could use to make
3938 * filename point to an accessible directory. So there is a faint
3939 * chance that someone could execute a setuid script down in a
3940 * non-accessible directory. I don't know what to do about that.
3941 * But I don't think it's too important. The manual lies when
3942 * it says access() is useful in setuid programs.
3944 * So, access() is pretty useless... but not harmful... do anyway.
3946 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3947 Perl_croak(aTHX_ "Can't access() script\n");
3950 /* If we can swap euid and uid, then we can determine access rights
3951 * with a simple stat of the file, and then compare device and
3952 * inode to make sure we did stat() on the same file we opened.
3953 * Then we just have to make sure he or she can execute it.
3956 * As the script is opened by perl, not suidperl, we do not need to
3957 * care much about access rights.
3959 * The 'script changed' check is needed, or we can get lied to
3960 * about $0 with e.g.
3961 * suidperl /dev/fd/4//bin/x 4<setuidscript
3962 * Without HAS_SETREUID, is it safe to stat() as root?
3964 * Are there any operating systems that pass /dev/fd/xxx for setuid
3965 * scripts, as suggested/described in perlsec(1)? Surely they do not
3966 * pass the script name as we do, so the "script changed" test would
3967 * fail for them... but we never get here with
3968 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3970 * This is one place where we must "lie" about return status: not
3971 * say if the stat() failed. We are doing this as root, and could
3972 * be tricked into reporting existence or not of files that the
3973 * "plain" user cannot even see.
3977 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3978 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3979 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3980 Perl_croak(aTHX_ "Setuid script changed\n");
3984 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3985 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3988 * We used to do this check as the "plain" user (after swapping
3989 * UIDs). But the check for nosuid and noexec filesystem is needed,
3990 * and should be done even without HAS_SETREUID. (Maybe those
3991 * operating systems do not have such mount options anyway...)
3992 * Seems safe enough to do as root.
3994 #if !defined(NO_NOSUID_CHECK)
3995 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3996 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3999 #endif /* IAMSUID */
4001 if (!S_ISREG(PL_statbuf.st_mode)) {
4002 Perl_croak(aTHX_ "Setuid script not plain file\n");
4004 if (PL_statbuf.st_mode & S_IWOTH)
4005 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4006 PL_doswitches = FALSE; /* -s is insecure in suid */
4007 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4008 CopLINE_inc(PL_curcop);
4009 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4010 Perl_croak(aTHX_ "No #! line");
4011 linestr = SvPV_nolen_const(PL_linestr);
4012 /* required even on Sys V */
4013 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4014 Perl_croak(aTHX_ "No #! line");
4018 /* Sanity check on line length */
4019 s_end = s + strlen(s);
4020 if (s_end == s || (s_end - s) > 4000)
4021 Perl_croak(aTHX_ "Very long #! line");
4022 /* Allow more than a single space after #! */
4023 while (isSPACE(*s)) s++;
4024 /* Sanity check on buffer end */
4025 while ((*s) && !isSPACE(*s)) s++;
4026 for (s2 = s; (s2 > linestr &&
4027 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4028 || s2[-1] == '-')); s2--) ;
4029 /* Sanity check on buffer start */
4030 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4031 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4032 Perl_croak(aTHX_ "Not a perl script");
4033 while (*s == ' ' || *s == '\t') s++;
4035 * #! arg must be what we saw above. They can invoke it by
4036 * mentioning suidperl explicitly, but they may not add any strange
4037 * arguments beyond what #! says if they do invoke suidperl that way.
4040 * The way validarg was set up, we rely on the kernel to start
4041 * scripts with argv[1] set to contain all #! line switches (the
4045 * Check that we got all the arguments listed in the #! line (not
4046 * just that there are no extraneous arguments). Might not matter
4047 * much, as switches from #! line seem to be acted upon (also), and
4048 * so may be checked and trapped in perl. But, security checks must
4049 * be done in suidperl and not deferred to perl. Note that suidperl
4050 * does not get around to parsing (and checking) the switches on
4051 * the #! line (but execs perl sooner).
4052 * Allow (require) a trailing newline (which may be of two
4053 * characters on some architectures?) (but no other trailing
4056 len = strlen(validarg);
4057 if (strEQ(validarg," PHOOEY ") ||
4058 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4059 !((s_end - s) == len+1
4060 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4061 Perl_croak(aTHX_ "Args must match #! line");
4065 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4066 PL_euid == PL_statbuf.st_uid)
4068 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4069 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4070 #endif /* IAMSUID */
4073 PL_euid) { /* oops, we're not the setuid root perl */
4075 * When root runs a setuid script, we do not go through the same
4076 * steps of execing sperl and then perl with fd scripts, but
4077 * simply set up UIDs within the same perl invocation; so do
4078 * not have the same checks (on options, whatever) that we have
4079 * for plain users. No problem really: would have to be a script
4080 * that does not actually work for plain users; and if root is
4081 * foolish and can be persuaded to run such an unsafe script, he
4082 * might run also non-setuid ones, and deserves what he gets.
4084 * Or, we might drop the PL_euid check above (and rely just on
4085 * fdscript to avoid loops), and do the execs
4091 * Pass fd script to suidperl.
4092 * Exec suidperl, substituting fd script for scriptname.
4093 * Pass script name as "subdir" of fd, which perl will grok;
4094 * in fact will use that to distinguish this from "normal"
4095 * usage, see comments above.
4097 PerlIO_rewind(PL_rsfp);
4098 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4099 /* PSz 27 Feb 04 Sanity checks on scriptname */
4100 if ((!scriptname) || (!*scriptname) ) {
4101 Perl_croak(aTHX_ "No setuid script name\n");
4103 if (*scriptname == '-') {
4104 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4105 /* Or we might confuse it with an option when replacing
4106 * name in argument list, below (though we do pointer, not
4107 * string, comparisons).
4110 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4111 if (!PL_origargv[which]) {
4112 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4114 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4115 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4116 #if defined(HAS_FCNTL) && defined(F_SETFD)
4117 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4120 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4121 (int)PERL_REVISION, (int)PERL_VERSION,
4122 (int)PERL_SUBVERSION), PL_origargv);
4124 #endif /* IAMSUID */
4125 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4128 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4130 * This seems back to front: we try HAS_SETEGID first; if not available
4131 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4132 * in the sense that we only want to set EGID; but are there any machines
4133 * with either of the latter, but not the former? Same with UID, later.
4136 (void)setegid(PL_statbuf.st_gid);
4139 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4141 #ifdef HAS_SETRESGID
4142 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4144 PerlProc_setgid(PL_statbuf.st_gid);
4148 if (PerlProc_getegid() != PL_statbuf.st_gid)
4149 Perl_croak(aTHX_ "Can't do setegid!\n");
4151 if (PL_statbuf.st_mode & S_ISUID) {
4152 if (PL_statbuf.st_uid != PL_euid)
4154 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4157 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4159 #ifdef HAS_SETRESUID
4160 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4162 PerlProc_setuid(PL_statbuf.st_uid);
4166 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4167 Perl_croak(aTHX_ "Can't do seteuid!\n");
4169 else if (PL_uid) { /* oops, mustn't run as root */
4171 (void)seteuid((Uid_t)PL_uid);
4174 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4176 #ifdef HAS_SETRESUID
4177 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4179 PerlProc_setuid((Uid_t)PL_uid);
4183 if (PerlProc_geteuid() != PL_uid)
4184 Perl_croak(aTHX_ "Can't do seteuid!\n");
4187 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4188 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4191 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4192 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4193 else if (fdscript < 0 || suidscript != 1)
4194 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4195 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4197 /* PSz 16 Sep 03 Keep neat error message */
4198 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4201 /* We absolutely must clear out any saved ids here, so we */
4202 /* exec the real perl, substituting fd script for scriptname. */
4203 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4205 * It might be thought that using setresgid and/or setresuid (changed to
4206 * set the saved IDs) above might obviate the need to exec, and we could
4207 * go on to "do the perl thing".
4209 * Is there such a thing as "saved GID", and is that set for setuid (but
4210 * not setgid) execution like suidperl? Without exec, it would not be
4211 * cleared for setuid (but not setgid) scripts (or might need a dummy
4214 * We need suidperl to do the exact same argument checking that perl
4215 * does. Thus it cannot be very small; while it could be significantly
4216 * smaller, it is safer (simpler?) to make it essentially the same
4217 * binary as perl (but they are not identical). - Maybe could defer that
4218 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4219 * but prefer to do thorough checks in suidperl itself. Such deferral
4220 * would make suidperl security rely on perl, a design no-no.
4222 * Setuid things should be short and simple, thus easy to understand and
4223 * verify. They should do their "own thing", without influence by
4224 * attackers. It may help if their internal execution flow is fixed,
4225 * regardless of platform: it may be best to exec anyway.
4227 * Suidperl should at least be conceptually simple: a wrapper only,
4228 * never to do any real perl. Maybe we should put
4230 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4232 * into the perly bits.
4234 PerlIO_rewind(PL_rsfp);
4235 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4237 * Keep original arguments: suidperl already has fd script.
4239 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4240 /* if (!PL_origargv[which]) { */
4241 /* errno = EPERM; */
4242 /* Perl_croak(aTHX_ "Permission denied\n"); */
4244 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4245 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4246 #if defined(HAS_FCNTL) && defined(F_SETFD)
4247 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4250 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4251 (int)PERL_REVISION, (int)PERL_VERSION,
4252 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4254 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4255 #endif /* IAMSUID */
4257 PERL_UNUSED_ARG(fdscript);
4258 PERL_UNUSED_ARG(suidscript);
4259 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4260 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4261 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4262 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4264 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4267 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4268 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4269 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4270 /* not set-id, must be wrapped */
4273 PERL_UNUSED_ARG(validarg);
4274 PERL_UNUSED_ARG(scriptname);
4278 S_find_beginning(pTHX)
4282 register const char *s2;
4283 #ifdef MACOS_TRADITIONAL
4287 /* skip forward in input to the real script? */
4289 #ifdef MACOS_TRADITIONAL
4290 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4292 while (PL_doextract || gMacPerl_AlwaysExtract) {
4293 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4294 if (!gMacPerl_AlwaysExtract)
4295 Perl_croak(aTHX_ "No Perl script found in input\n");
4297 if (PL_doextract) /* require explicit override ? */
4298 if (!OverrideExtract(PL_origfilename))
4299 Perl_croak(aTHX_ "User aborted script\n");
4301 PL_doextract = FALSE;
4303 /* Pater peccavi, file does not have #! */
4304 PerlIO_rewind(PL_rsfp);
4309 while (PL_doextract) {
4310 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4311 Perl_croak(aTHX_ "No Perl script found in input\n");
4314 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4315 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4316 PL_doextract = FALSE;
4317 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4319 while (*s == ' ' || *s == '\t') s++;
4321 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4322 || s2[-1] == '_') s2--;
4323 if (strnEQ(s2-4,"perl",4))
4324 while ((s = moreswitches(s)))
4327 #ifdef MACOS_TRADITIONAL
4328 /* We are always searching for the #!perl line in MacPerl,
4329 * so if we find it, still keep the line count correct
4330 * by counting lines we already skipped over
4332 for (; maclines > 0 ; maclines--)
4333 PerlIO_ungetc(PL_rsfp, '\n');
4337 /* gMacPerl_AlwaysExtract is false in MPW tool */
4338 } else if (gMacPerl_AlwaysExtract) {
4350 PL_uid = PerlProc_getuid();
4351 PL_euid = PerlProc_geteuid();
4352 PL_gid = PerlProc_getgid();
4353 PL_egid = PerlProc_getegid();
4355 PL_uid |= PL_gid << 16;
4356 PL_euid |= PL_egid << 16;
4358 /* Should not happen: */
4359 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4360 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4363 * Should go by suidscript, not uid!=euid: why disallow
4364 * system("ls") in scripts run from setuid things?
4365 * Or, is this run before we check arguments and set suidscript?
4366 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4367 * (We never have suidscript, can we be sure to have fdscript?)
4368 * Or must then go by UID checks? See comments in forbid_setid also.
4372 /* This is used very early in the lifetime of the program,
4373 * before even the options are parsed, so PL_tainting has
4374 * not been initialized properly. */
4376 Perl_doing_taint(int argc, char *argv[], char *envp[])
4378 #ifndef PERL_IMPLICIT_SYS
4379 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4380 * before we have an interpreter-- and the whole point of this
4381 * function is to be called at such an early stage. If you are on
4382 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4383 * "tainted because running with altered effective ids', you'll
4384 * have to add your own checks somewhere in here. The two most
4385 * known samples of 'implicitness' are Win32 and NetWare, neither
4386 * of which has much of concept of 'uids'. */
4387 int uid = PerlProc_getuid();
4388 int euid = PerlProc_geteuid();
4389 int gid = PerlProc_getgid();
4390 int egid = PerlProc_getegid();
4397 if (uid && (euid != uid || egid != gid))
4399 #endif /* !PERL_IMPLICIT_SYS */
4400 /* This is a really primitive check; environment gets ignored only
4401 * if -T are the first chars together; otherwise one gets
4402 * "Too late" message. */
4403 if ( argc > 1 && argv[1][0] == '-'
4404 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4409 /* Passing the flag as a single char rather than a string is a slight space
4410 optimisation. The only message that isn't /^-.$/ is
4411 "program input from stdin", which is substituted in place of '\0', which
4412 could never be a command line flag. */
4414 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4417 char string[3] = "-x";
4418 const char *message = "program input from stdin";
4425 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4426 if (PL_euid != PL_uid)
4427 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4428 if (PL_egid != PL_gid)
4429 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4430 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4432 * Checks for UID/GID above "wrong": why disallow
4433 * perl -e 'print "Hello\n"'
4434 * from within setuid things?? Simply drop them: replaced by
4435 * fdscript/suidscript and #ifdef IAMSUID checks below.
4437 * This may be too late for command-line switches. Will catch those on
4438 * the #! line, after finding the script name and setting up
4439 * fdscript/suidscript. Note that suidperl does not get around to
4440 * parsing (and checking) the switches on the #! line, but checks that
4441 * the two sets are identical.
4443 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4444 * instead, or would that be "too late"? (We never have suidscript, can
4445 * we be sure to have fdscript?)
4447 * Catch things with suidscript (in descendant of suidperl), even with
4448 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4449 * below; but I am paranoid.
4451 * Also see comments about root running a setuid script, elsewhere.
4453 if (suidscript >= 0)
4454 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4456 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4457 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4458 #endif /* IAMSUID */
4462 Perl_init_debugger(pTHX)
4465 HV * const ostash = PL_curstash;
4467 PL_curstash = PL_debstash;
4468 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4470 AvREAL_off(PL_dbargs);
4471 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4472 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4473 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4474 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4475 sv_setiv(PL_DBsingle, 0);
4476 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4477 sv_setiv(PL_DBtrace, 0);
4478 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4479 sv_setiv(PL_DBsignal, 0);
4480 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4481 sv_setiv(PL_DBassertion, 0);
4482 PL_curstash = ostash;
4485 #ifndef STRESS_REALLOC
4486 #define REASONABLE(size) (size)
4488 #define REASONABLE(size) (1) /* unreasonable */
4492 Perl_init_stacks(pTHX)
4495 /* start with 128-item stack and 8K cxstack */
4496 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4497 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4498 PL_curstackinfo->si_type = PERLSI_MAIN;
4499 PL_curstack = PL_curstackinfo->si_stack;
4500 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4502 PL_stack_base = AvARRAY(PL_curstack);
4503 PL_stack_sp = PL_stack_base;
4504 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4506 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4509 PL_tmps_max = REASONABLE(128);
4511 Newx(PL_markstack,REASONABLE(32),I32);
4512 PL_markstack_ptr = PL_markstack;
4513 PL_markstack_max = PL_markstack + REASONABLE(32);
4517 Newx(PL_scopestack,REASONABLE(32),I32);
4518 PL_scopestack_ix = 0;
4519 PL_scopestack_max = REASONABLE(32);
4521 Newx(PL_savestack,REASONABLE(128),ANY);
4522 PL_savestack_ix = 0;
4523 PL_savestack_max = REASONABLE(128);
4532 while (PL_curstackinfo->si_next)
4533 PL_curstackinfo = PL_curstackinfo->si_next;
4534 while (PL_curstackinfo) {
4535 PERL_SI *p = PL_curstackinfo->si_prev;
4536 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4537 Safefree(PL_curstackinfo->si_cxstack);
4538 Safefree(PL_curstackinfo);
4539 PL_curstackinfo = p;
4541 Safefree(PL_tmps_stack);
4542 Safefree(PL_markstack);
4543 Safefree(PL_scopestack);
4544 Safefree(PL_savestack);
4554 lex_start(PL_linestr);
4556 PL_subname = newSVpvs("main");
4560 S_init_predump_symbols(pTHX)
4566 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4567 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4568 GvMULTI_on(PL_stdingv);
4569 io = GvIOp(PL_stdingv);
4570 IoTYPE(io) = IoTYPE_RDONLY;
4571 IoIFP(io) = PerlIO_stdin();
4572 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4574 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4576 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4579 IoTYPE(io) = IoTYPE_WRONLY;
4580 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4582 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4584 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4586 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4587 GvMULTI_on(PL_stderrgv);
4588 io = GvIOp(PL_stderrgv);
4589 IoTYPE(io) = IoTYPE_WRONLY;
4590 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4591 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4593 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4595 PL_statname = newSV(0); /* last filename we did stat on */
4597 Safefree(PL_osname);
4598 PL_osname = savepv(OSNAME);
4602 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4605 argc--,argv++; /* skip name of script */
4606 if (PL_doswitches) {
4607 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4611 if (argv[0][1] == '-' && !argv[0][2]) {
4615 if ((s = strchr(argv[0], '='))) {
4616 const char *const start_name = argv[0] + 1;
4617 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4618 TRUE, SVt_PV)), s + 1);
4621 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4624 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4625 GvMULTI_on(PL_argvgv);
4626 (void)gv_AVadd(PL_argvgv);
4627 av_clear(GvAVn(PL_argvgv));
4628 for (; argc > 0; argc--,argv++) {
4629 SV * const sv = newSVpv(argv[0],0);
4630 av_push(GvAVn(PL_argvgv),sv);
4631 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4632 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4635 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4636 (void)sv_utf8_decode(sv);
4642 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4647 PL_toptarget = newSV(0);
4648 sv_upgrade(PL_toptarget, SVt_PVFM);
4649 sv_setpvn(PL_toptarget, "", 0);
4650 PL_bodytarget = newSV(0);
4651 sv_upgrade(PL_bodytarget, SVt_PVFM);
4652 sv_setpvn(PL_bodytarget, "", 0);
4653 PL_formtarget = PL_bodytarget;
4657 init_argv_symbols(argc,argv);
4659 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4660 #ifdef MACOS_TRADITIONAL
4661 /* $0 is not majick on a Mac */
4662 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4664 sv_setpv(GvSV(tmpgv),PL_origfilename);
4665 magicname("0", "0", 1);
4668 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4670 bool env_is_not_environ;
4671 GvMULTI_on(PL_envgv);
4672 hv = GvHVn(PL_envgv);
4673 hv_magic(hv, NULL, PERL_MAGIC_env);
4675 #ifdef USE_ENVIRON_ARRAY
4676 /* Note that if the supplied env parameter is actually a copy
4677 of the global environ then it may now point to free'd memory
4678 if the environment has been modified since. To avoid this
4679 problem we treat env==NULL as meaning 'use the default'
4683 env_is_not_environ = env != environ;
4684 if (env_is_not_environ
4685 # ifdef USE_ITHREADS
4686 && PL_curinterp == aTHX
4693 char** origenv = environ;
4696 for (; *env; env++) {
4697 if (!(s = strchr(*env,'=')) || s == *env)
4699 #if defined(MSDOS) && !defined(DJGPP)
4704 sv = newSVpv(s+1, 0);
4705 (void)hv_store(hv, *env, s - *env, sv, 0);
4706 if (env_is_not_environ)
4708 if (origenv != environ) {
4709 /* realloc has shifted us */
4710 env = (env - origenv) + environ;
4715 #endif /* USE_ENVIRON_ARRAY */
4716 #endif /* !PERL_MICRO */
4719 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4720 SvREADONLY_off(GvSV(tmpgv));
4721 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4722 SvREADONLY_on(GvSV(tmpgv));
4724 #ifdef THREADS_HAVE_PIDS
4725 PL_ppid = (IV)getppid();
4728 /* touch @F array to prevent spurious warnings 20020415 MJD */
4730 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4732 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4733 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4734 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4738 S_init_perllib(pTHX)
4744 s = PerlEnv_getenv("PERL5LIB");
4746 * It isn't possible to delete an environment variable with
4747 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4748 * case we treat PERL5LIB as undefined if it has a zero-length value.
4750 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4751 if (s && *s != '\0')
4755 incpush(s, TRUE, TRUE, TRUE, FALSE);
4757 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4759 /* Treat PERL5?LIB as a possible search list logical name -- the
4760 * "natural" VMS idiom for a Unix path string. We allow each
4761 * element to be a set of |-separated directories for compatibility.
4765 if (my_trnlnm("PERL5LIB",buf,0))
4766 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4768 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4772 /* Use the ~-expanded versions of APPLLIB (undocumented),
4773 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4776 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4780 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4782 #ifdef MACOS_TRADITIONAL
4785 SV * privdir = newSV(0);
4786 char * macperl = PerlEnv_getenv("MACPERL");
4791 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4792 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4793 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4794 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4795 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4796 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4798 SvREFCNT_dec(privdir);
4801 incpush(":", FALSE, FALSE, TRUE, FALSE);
4804 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4807 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4809 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4813 /* sitearch is always relative to sitelib on Windows for
4814 * DLL-based path intuition to work correctly */
4815 # if !defined(WIN32)
4816 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4822 /* this picks up sitearch as well */
4823 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4825 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4829 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4830 /* Search for version-specific dirs below here */
4831 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4834 #ifdef PERL_VENDORARCH_EXP
4835 /* vendorarch is always relative to vendorlib on Windows for
4836 * DLL-based path intuition to work correctly */
4837 # if !defined(WIN32)
4838 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4842 #ifdef PERL_VENDORLIB_EXP
4844 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4846 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4850 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4851 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4854 #ifdef PERL_OTHERLIBDIRS
4855 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4859 incpush(".", FALSE, FALSE, TRUE, FALSE);
4860 #endif /* MACOS_TRADITIONAL */
4863 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4864 # define PERLLIB_SEP ';'
4867 # define PERLLIB_SEP '|'
4869 # if defined(MACOS_TRADITIONAL)
4870 # define PERLLIB_SEP ','
4872 # define PERLLIB_SEP ':'
4876 #ifndef PERLLIB_MANGLE
4877 # define PERLLIB_MANGLE(s,n) (s)
4880 /* Push a directory onto @INC if it exists.
4881 Generate a new SV if we do this, to save needing to copy the SV we push
4884 S_incpush_if_exists(pTHX_ SV *dir)
4888 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4889 S_ISDIR(tmpstatbuf.st_mode)) {
4890 av_push(GvAVn(PL_incgv), dir);
4897 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4902 const char *p = dir;
4907 if (addsubdirs || addoldvers) {
4911 /* Break at all separators */
4913 SV *libdir = newSV(0);
4916 /* skip any consecutive separators */
4918 while ( *p == PERLLIB_SEP ) {
4919 /* Uncomment the next line for PATH semantics */
4920 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4925 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4926 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4931 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4932 p = NULL; /* break out */
4934 #ifdef MACOS_TRADITIONAL
4935 if (!strchr(SvPVX(libdir), ':')) {
4938 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4940 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4941 sv_catpvs(libdir, ":");
4944 /* Do the if() outside the #ifdef to avoid warnings about an unused
4947 #ifdef PERL_RELOCATABLE_INC
4949 * Relocatable include entries are marked with a leading .../
4952 * 0: Remove that leading ".../"
4953 * 1: Remove trailing executable name (anything after the last '/')
4954 * from the perl path to give a perl prefix
4956 * While the @INC element starts "../" and the prefix ends with a real
4957 * directory (ie not . or ..) chop that real directory off the prefix
4958 * and the leading "../" from the @INC element. ie a logical "../"
4960 * Finally concatenate the prefix and the remainder of the @INC element
4961 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4962 * generates /usr/local/lib/perl5
4964 const char *libpath = SvPVX(libdir);
4965 STRLEN libpath_len = SvCUR(libdir);
4966 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4968 SV * const caret_X = get_sv("\030", 0);
4969 /* Going to use the SV just as a scratch buffer holding a C
4975 /* $^X is *the* source of taint if tainting is on, hence
4976 SvPOK() won't be true. */
4978 assert(SvPOKp(caret_X));
4979 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4980 /* Firstly take off the leading .../
4981 If all else fail we'll do the paths relative to the current
4983 sv_chop(libdir, libpath + 4);
4984 /* Don't use SvPV as we're intentionally bypassing taining,
4985 mortal copies that the mg_get of tainting creates, and
4986 corruption that seems to come via the save stack.
4987 I guess that the save stack isn't correctly set up yet. */
4988 libpath = SvPVX(libdir);
4989 libpath_len = SvCUR(libdir);
4991 /* This would work more efficiently with memrchr, but as it's
4992 only a GNU extension we'd need to probe for it and
4993 implement our own. Not hard, but maybe not worth it? */
4995 prefix = SvPVX(prefix_sv);
4996 lastslash = strrchr(prefix, '/');
4998 /* First time in with the *lastslash = '\0' we just wipe off
4999 the trailing /perl from (say) /usr/foo/bin/perl
5003 while ((*lastslash = '\0'), /* Do that, come what may. */
5004 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5005 && (lastslash = strrchr(prefix, '/')))) {
5006 if (lastslash[1] == '\0'
5007 || (lastslash[1] == '.'
5008 && (lastslash[2] == '/' /* ends "/." */
5009 || (lastslash[2] == '/'
5010 && lastslash[3] == '/' /* or "/.." */
5012 /* Prefix ends "/" or "/." or "/..", any of which
5013 are fishy, so don't do any more logical cleanup.
5017 /* Remove leading "../" from path */
5020 /* Next iteration round the loop removes the last
5021 directory name from prefix by writing a '\0' in
5022 the while clause. */
5024 /* prefix has been terminated with a '\0' to the correct
5025 length. libpath points somewhere into the libdir SV.
5026 We need to join the 2 with '/' and drop the result into
5028 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5029 SvREFCNT_dec(libdir);
5030 /* And this is the new libdir. */
5033 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5034 /* Need to taint reloccated paths if running set ID */
5035 SvTAINTED_on(libdir);
5038 SvREFCNT_dec(prefix_sv);
5043 * BEFORE pushing libdir onto @INC we may first push version- and
5044 * archname-specific sub-directories.
5046 if (addsubdirs || addoldvers) {
5047 #ifdef PERL_INC_VERSION_LIST
5048 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5049 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5050 const char * const *incver;
5056 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5058 while (unix[len-1] == '/') len--; /* Cosmetic */
5059 sv_usepvn(libdir,unix,len);
5062 PerlIO_printf(Perl_error_log,
5063 "Failed to unixify @INC element \"%s\"\n",
5067 #ifdef MACOS_TRADITIONAL
5068 #define PERL_AV_SUFFIX_FMT ""
5069 #define PERL_ARCH_FMT "%s:"
5070 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5072 #define PERL_AV_SUFFIX_FMT "/"
5073 #define PERL_ARCH_FMT "/%s"
5074 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5076 /* .../version/archname if -d .../version/archname */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5079 (int)PERL_REVISION, (int)PERL_VERSION,
5080 (int)PERL_SUBVERSION, ARCHNAME);
5081 subdir = S_incpush_if_exists(aTHX_ subdir);
5083 /* .../version if -d .../version */
5084 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5086 (int)PERL_REVISION, (int)PERL_VERSION,
5087 (int)PERL_SUBVERSION);
5088 subdir = S_incpush_if_exists(aTHX_ subdir);
5090 /* .../archname if -d .../archname */
5091 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5092 SVfARG(libdir), ARCHNAME);
5093 subdir = S_incpush_if_exists(aTHX_ subdir);
5097 #ifdef PERL_INC_VERSION_LIST
5099 for (incver = incverlist; *incver; incver++) {
5100 /* .../xxx if -d .../xxx */
5101 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5102 SVfARG(libdir), *incver);
5103 subdir = S_incpush_if_exists(aTHX_ subdir);
5109 /* finally push this lib directory on the end of @INC */
5110 av_push(GvAVn(PL_incgv), libdir);
5113 assert (SvREFCNT(subdir) == 1);
5114 SvREFCNT_dec(subdir);
5120 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5124 const line_t oldline = CopLINE(PL_curcop);
5130 while (av_len(paramList) >= 0) {
5131 cv = (CV*)av_shift(paramList);
5133 if (paramList == PL_beginav) {
5134 /* save PL_beginav for compiler */
5135 if (! PL_beginav_save)
5136 PL_beginav_save = newAV();
5137 av_push(PL_beginav_save, (SV*)cv);
5139 else if (paramList == PL_checkav) {
5140 /* save PL_checkav for compiler */
5141 if (! PL_checkav_save)
5142 PL_checkav_save = newAV();
5143 av_push(PL_checkav_save, (SV*)cv);
5145 else if (paramList == PL_unitcheckav) {
5146 /* save PL_unitcheckav for compiler */
5147 if (! PL_unitcheckav_save)
5148 PL_unitcheckav_save = newAV();
5149 av_push(PL_unitcheckav_save, (SV*)cv);
5160 PL_madskills |= 16384;
5165 PL_madskills &= ~16384;
5168 (void)SvPV_const(atsv, len);
5169 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5170 break; /* not really trying to run, so just wing it */
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5174 if (paramList == PL_beginav)
5175 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5177 Perl_sv_catpvf(aTHX_ atsv,
5178 "%s failed--call queue aborted",
5179 paramList == PL_checkav ? "CHECK"
5180 : paramList == PL_initav ? "INIT"
5181 : paramList == PL_unitcheckav ? "UNITCHECK"
5183 while (PL_scopestack_ix > oldscope)
5186 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5193 /* my_exit() was called */
5194 while (PL_scopestack_ix > oldscope)
5197 PL_curstash = PL_defstash;
5198 PL_curcop = &PL_compiling;
5199 CopLINE_set(PL_curcop, oldline);
5201 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5202 return; /* not really trying to run, so just wing it */
5203 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5204 if (paramList == PL_beginav)
5205 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5207 Perl_croak(aTHX_ "%s failed--call queue aborted",
5208 paramList == PL_checkav ? "CHECK"
5209 : paramList == PL_initav ? "INIT"
5210 : paramList == PL_unitcheckav ? "UNITCHECK"
5217 PL_curcop = &PL_compiling;
5218 CopLINE_set(PL_curcop, oldline);
5221 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5230 Perl_my_exit(pTHX_ U32 status)
5233 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5234 (void*)thr, (unsigned long) status));
5243 STATUS_EXIT_SET(status);
5250 Perl_my_failure_exit(pTHX)
5254 /* We have been called to fall on our sword. The desired exit code
5255 * should be already set in STATUS_UNIX, but could be shifted over
5256 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5259 * If an error code has not been set, then force the issue.
5261 if (MY_POSIX_EXIT) {
5263 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5264 * the exit code when there isn't an error.
5267 if (STATUS_UNIX == 0)
5268 STATUS_UNIX_EXIT_SET(255);
5270 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5272 /* The exit code could have been set by $? or vmsish which
5273 * means that it may not be fatal. So convert
5274 * success/warning codes to fatal.
5276 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5277 STATUS_UNIX_EXIT_SET(255);
5281 /* Traditionally Perl on VMS always expects a Fatal Error. */
5282 if (vaxc$errno & 1) {
5284 /* So force success status to failure */
5285 if (STATUS_NATIVE & 1)
5290 STATUS_UNIX = EINTR; /* In case something cares */
5295 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5297 /* Encode the severity code */
5298 severity = STATUS_NATIVE & STS$M_SEVERITY;
5299 STATUS_UNIX = (severity ? severity : 1) << 8;
5301 /* Perl expects this to be a fatal error */
5302 if (severity != STS$K_SEVERE)
5311 STATUS_UNIX_SET(errno);
5313 exitstatus = STATUS_UNIX >> 8;
5314 if (exitstatus & 255)
5315 STATUS_UNIX_SET(exitstatus);
5317 STATUS_UNIX_SET(255);
5324 S_my_exit_jump(pTHX)
5329 SvREFCNT_dec(PL_e_script);
5333 POPSTACK_TO(PL_mainstack);
5341 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5344 const char * const p = SvPVX_const(PL_e_script);
5345 const char *nl = strchr(p, '\n');
5347 PERL_UNUSED_ARG(idx);
5348 PERL_UNUSED_ARG(maxlen);
5350 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5352 filter_del(read_e_script);
5355 sv_catpvn(buf_sv, p, nl-p);
5356 sv_chop(PL_e_script, nl);
5362 * c-indentation-style: bsd
5364 * indent-tabs-mode: t
5367 * ex: set ts=8 sts=4 sw=4 noet: