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>.
1331 if (PL_veto_cleanup)
1334 #ifdef PERL_TRACK_MEMPOOL
1337 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1338 * value as we're probably hunting memory leaks then
1340 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1341 if (!s || atoi(s) == 0) {
1342 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1343 thread at thread exit. */
1344 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1345 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1350 #if defined(WIN32) || defined(NETWARE)
1351 # if defined(PERL_IMPLICIT_SYS)
1354 void *host = nw_internal_host;
1356 void *host = w32_internal_host;
1358 PerlMem_free(aTHXx);
1360 nw_delete_internal_host(host);
1362 win32_delete_internal_host(host);
1366 PerlMem_free(aTHXx);
1369 PerlMem_free(aTHXx);
1373 #if defined(USE_ITHREADS)
1374 /* provide destructors to clean up the thread key when libperl is unloaded */
1375 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1377 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1378 #pragma fini "perl_fini"
1379 #elif defined(__sun) && !defined(__GNUC__)
1380 #pragma fini (perl_fini)
1384 #if defined(__GNUC__)
1385 __attribute__((destructor))
1390 if (PL_curinterp && !PL_veto_cleanup)
1395 #endif /* THREADS */
1398 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1401 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1402 PL_exitlist[PL_exitlistlen].fn = fn;
1403 PL_exitlist[PL_exitlistlen].ptr = ptr;
1407 #ifdef HAS_PROCSELFEXE
1408 /* This is a function so that we don't hold on to MAXPATHLEN
1409 bytes of stack longer than necessary
1412 S_procself_val(pTHX_ SV *sv, const char *arg0)
1414 char buf[MAXPATHLEN];
1415 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1417 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1418 includes a spurious NUL which will cause $^X to fail in system
1419 or backticks (this will prevent extensions from being built and
1420 many tests from working). readlink is not meant to add a NUL.
1421 Normal readlink works fine.
1423 if (len > 0 && buf[len-1] == '\0') {
1427 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1428 returning the text "unknown" from the readlink rather than the path
1429 to the executable (or returning an error from the readlink). Any valid
1430 path has a '/' in it somewhere, so use that to validate the result.
1431 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1433 if (len > 0 && memchr(buf, '/', len)) {
1434 sv_setpvn(sv,buf,len);
1440 #endif /* HAS_PROCSELFEXE */
1443 S_set_caret_X(pTHX) {
1445 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1447 #ifdef HAS_PROCSELFEXE
1448 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1451 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1453 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1460 =for apidoc perl_parse
1462 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1468 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1475 PERL_UNUSED_ARG(my_perl);
1477 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1480 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1481 setuid perl scripts securely.\n");
1482 #endif /* IAMSUID */
1485 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1486 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1487 * This MUST be done before any hash stores or fetches take place.
1488 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1489 * yourself, it is your responsibility to provide a good random seed!
1490 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1491 if (!PL_rehash_seed_set)
1492 PL_rehash_seed = get_hash_seed();
1494 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1496 if (s && (atoi(s) == 1))
1497 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1499 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1504 if (PL_origalen != 0) {
1505 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1508 /* Set PL_origalen be the sum of the contiguous argv[]
1509 * elements plus the size of the env in case that it is
1510 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1511 * as the maximum modifiable length of $0. In the worst case
1512 * the area we are able to modify is limited to the size of
1513 * the original argv[0]. (See below for 'contiguous', though.)
1515 const char *s = NULL;
1518 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1519 /* Do the mask check only if the args seem like aligned. */
1521 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1523 /* See if all the arguments are contiguous in memory. Note
1524 * that 'contiguous' is a loose term because some platforms
1525 * align the argv[] and the envp[]. If the arguments look
1526 * like non-aligned, assume that they are 'strictly' or
1527 * 'traditionally' contiguous. If the arguments look like
1528 * aligned, we just check that they are within aligned
1529 * PTRSIZE bytes. As long as no system has something bizarre
1530 * like the argv[] interleaved with some other data, we are
1531 * fine. (Did I just evoke Murphy's Law?) --jhi */
1532 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1534 for (i = 1; i < PL_origargc; i++) {
1535 if ((PL_origargv[i] == s + 1
1537 || PL_origargv[i] == s + 2
1542 (PL_origargv[i] > s &&
1544 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 /* Can we grab env area too to be used as the area for $0? */
1555 if (s && PL_origenviron) {
1556 if ((PL_origenviron[0] == s + 1)
1559 (PL_origenviron[0] > s &&
1560 PL_origenviron[0] <=
1561 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1564 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1565 s = PL_origenviron[0];
1568 my_setenv("NoNe SuCh", NULL);
1569 /* Force copy of environment. */
1570 for (i = 1; PL_origenviron[i]; i++) {
1571 if (PL_origenviron[i] == s + 1
1574 (PL_origenviron[i] > s &&
1575 PL_origenviron[i] <=
1576 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1579 s = PL_origenviron[i];
1587 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1592 /* Come here if running an undumped a.out. */
1594 PL_origfilename = savepv(argv[0]);
1595 PL_do_undump = FALSE;
1596 cxstack_ix = -1; /* start label stack again */
1598 assert (!PL_tainted);
1600 S_set_caret_X(aTHX);
1602 init_postdump_symbols(argc,argv,env);
1607 op_free(PL_main_root);
1608 PL_main_root = NULL;
1610 PL_main_start = NULL;
1611 SvREFCNT_dec(PL_main_cv);
1615 oldscope = PL_scopestack_ix;
1616 PL_dowarn = G_WARN_OFF;
1621 parse_body(env,xsinit);
1623 call_list(oldscope, PL_unitcheckav);
1625 call_list(oldscope, PL_checkav);
1632 /* my_exit() was called */
1633 while (PL_scopestack_ix > oldscope)
1636 PL_curstash = PL_defstash;
1638 call_list(oldscope, PL_unitcheckav);
1640 call_list(oldscope, PL_checkav);
1644 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1653 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1656 int argc = PL_origargc;
1657 char **argv = PL_origargv;
1658 const char *scriptname = NULL;
1659 VOL bool dosearch = FALSE;
1660 const char *validarg = "";
1662 register char *s, c;
1663 const char *cddir = NULL;
1664 #ifdef USE_SITECUSTOMIZE
1665 bool minus_f = FALSE;
1668 sv_setpvn(PL_linestr,"",0);
1669 sv = newSVpvs(""); /* first used for -I flags */
1673 for (argc--,argv++; argc > 0; argc--,argv++) {
1674 if (argv[0][0] != '-' || !argv[0][1])
1678 validarg = " PHOOEY ";
1682 * Can we rely on the kernel to start scripts with argv[1] set to
1683 * contain all #! line switches (the whole line)? (argv[0] is set to
1684 * the interpreter name, argv[2] to the script name; argv[3] and
1685 * above may contain other arguments.)
1692 #ifndef PERL_STRICT_CR
1717 if ((s = moreswitches(s)))
1722 CHECK_MALLOC_TOO_LATE_FOR('t');
1723 if( !PL_tainting ) {
1724 PL_taint_warn = TRUE;
1730 CHECK_MALLOC_TOO_LATE_FOR('T');
1732 PL_taint_warn = FALSE;
1740 #ifdef MACOS_TRADITIONAL
1741 /* ignore -e for Dev:Pseudo argument */
1742 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1745 forbid_setid('e', -1);
1747 PL_e_script = newSVpvs("");
1748 filter_add(read_e_script, NULL);
1751 sv_catpv(PL_e_script, s);
1753 sv_catpv(PL_e_script, argv[1]);
1757 Perl_croak(aTHX_ "No code specified for -%c", c);
1758 sv_catpvs(PL_e_script, "\n");
1762 #ifdef USE_SITECUSTOMIZE
1768 case 'I': /* -I handled both here and in moreswitches() */
1769 forbid_setid('I', -1);
1770 if (!*++s && (s=argv[1]) != NULL) {
1774 STRLEN len = strlen(s);
1775 const char * const p = savepvn(s, len);
1776 incpush(p, TRUE, TRUE, FALSE, FALSE);
1777 sv_catpvs(sv, "-I");
1778 sv_catpvn(sv, p, len);
1783 Perl_croak(aTHX_ "No directory specified for -I");
1786 forbid_setid('P', -1);
1787 PL_preprocess = TRUE;
1791 forbid_setid('S', -1);
1800 PL_preambleav = newAV();
1801 av_push(PL_preambleav,
1802 newSVpvs("use Config;"));
1806 opts_prog = newSVpvs("print Config::myconfig(),");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1812 opts = SvCUR(opts_prog);
1814 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1818 # ifdef DEBUG_LEAKING_SCALARS
1819 " DEBUG_LEAKING_SCALARS"
1821 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1822 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1824 # ifdef FAKE_THREADS
1827 # ifdef MULTIPLICITY
1836 # ifdef PERL_DONT_CREATE_GVSV
1837 " PERL_DONT_CREATE_GVSV"
1839 # ifdef PERL_GLOBAL_STRUCT
1840 " PERL_GLOBAL_STRUCT"
1842 # ifdef PERL_IMPLICIT_CONTEXT
1843 " PERL_IMPLICIT_CONTEXT"
1845 # ifdef PERL_IMPLICIT_SYS
1846 " PERL_IMPLICIT_SYS"
1851 # ifdef PERL_MALLOC_WRAP
1854 # ifdef PERL_NEED_APPCTX
1857 # ifdef PERL_NEED_TIMESBASE
1858 " PERL_NEED_TIMESBASE"
1860 # ifdef PERL_OLD_COPY_ON_WRITE
1861 " PERL_OLD_COPY_ON_WRITE"
1863 # ifdef PERL_TRACK_MEMPOOL
1864 " PERL_TRACK_MEMPOOL"
1866 # ifdef PERL_USE_SAFE_PUTENV
1867 " PERL_USE_SAFE_PUTENV"
1869 #ifdef PERL_USES_PL_PIDSTATUS
1870 " PERL_USES_PL_PIDSTATUS"
1872 # ifdef PL_OP_SLAB_ALLOC
1875 # ifdef THREADS_HAVE_PIDS
1876 " THREADS_HAVE_PIDS"
1878 # ifdef USE_64_BIT_ALL
1881 # ifdef USE_64_BIT_INT
1884 # ifdef USE_ITHREADS
1887 # ifdef USE_LARGE_FILES
1890 # ifdef USE_LONG_DOUBLE
1896 # ifdef USE_REENTRANT_API
1897 " USE_REENTRANT_API"
1902 # ifdef USE_SITECUSTOMIZE
1903 " USE_SITECUSTOMIZE"
1910 while (SvCUR(opts_prog) > opts+76) {
1911 /* find last space after "options: " and before col 76
1915 char * const pv = SvPV_nolen(opts_prog);
1916 const char c = pv[opts+76];
1918 space = strrchr(pv+opts+26, ' ');
1920 if (!space) break; /* "Can't happen" */
1922 /* break the line before that space */
1925 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1926 STR_WITH_LEN("\\n "));
1929 sv_catpvs(opts_prog,"\\n\",");
1931 #if defined(LOCAL_PATCH_COUNT)
1932 if (LOCAL_PATCH_COUNT > 0) {
1934 sv_catpvs(opts_prog,
1935 "\" Locally applied patches:\\n\",");
1936 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1937 if (PL_localpatches[i])
1938 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1939 0, PL_localpatches[i], 0);
1943 Perl_sv_catpvf(aTHX_ opts_prog,
1944 "\" Built under %s\\n\"",OSNAME);
1947 Perl_sv_catpvf(aTHX_ opts_prog,
1948 ",\" Compiled at %s %s\\n\"",__DATE__,
1951 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1955 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1956 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1957 "sort grep {/^PERL/} keys %ENV; ");
1959 sv_catpvs(opts_prog,
1960 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1962 sv_catpvs(opts_prog,
1963 "print \" \\%ENV:\\n @env\\n\" if @env;"
1964 "print \" \\@INC:\\n @INC\\n\";");
1968 opts_prog = Perl_newSVpvf(aTHX_
1969 "Config::config_vars(qw%c%s%c)",
1973 av_push(PL_preambleav, opts_prog);
1974 /* don't look for script or read stdin */
1975 scriptname = BIT_BUCKET;
1979 PL_doextract = TRUE;
1987 if (!*++s || isSPACE(*s)) {
1991 /* catch use of gnu style long options */
1992 if (strEQ(s, "version")) {
1996 if (strEQ(s, "help")) {
2003 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2009 #ifndef SECURE_INTERNAL_GETENV
2012 (s = PerlEnv_getenv("PERL5OPT")))
2014 const char *popt = s;
2017 if (*s == '-' && *(s+1) == 'T') {
2018 CHECK_MALLOC_TOO_LATE_FOR('T');
2020 PL_taint_warn = FALSE;
2023 char *popt_copy = NULL;
2036 if (!strchr("CDIMUdmtwA", *s))
2037 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2041 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2042 s = popt_copy + (s - popt);
2043 d = popt_copy + (d - popt);
2050 if( !PL_tainting ) {
2051 PL_taint_warn = TRUE;
2061 #ifdef USE_SITECUSTOMIZE
2064 PL_preambleav = newAV();
2065 av_unshift(PL_preambleav, 1);
2066 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2071 scriptname = argv[0];
2074 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2076 else if (scriptname == NULL) {
2078 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2084 /* Set $^X early so that it can be used for relocatable paths in @INC */
2085 assert (!PL_tainted);
2087 S_set_caret_X(aTHX);
2094 = open_script(scriptname, dosearch, sv, &suidscript);
2096 validate_suid(validarg, scriptname, fdscript, suidscript);
2099 # if defined(SIGCHLD) || defined(SIGCLD)
2102 # define SIGCHLD SIGCLD
2104 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2105 if (sigstate == (Sighandler_t) SIG_IGN) {
2106 if (ckWARN(WARN_SIGNAL))
2107 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2108 "Can't ignore signal CHLD, forcing to default");
2109 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2116 #ifdef MACOS_TRADITIONAL
2117 || gMacPerl_AlwaysExtract
2121 /* This will croak if suidscript is >= 0, as -x cannot be used with
2123 forbid_setid('x', suidscript);
2124 /* Hence you can't get here if suidscript >= 0 */
2127 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2128 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2132 PL_main_cv = PL_compcv = (CV*)newSV(0);
2133 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2134 CvUNIQUE_on(PL_compcv);
2136 CvPADLIST(PL_compcv) = pad_new(0);
2139 boot_core_UNIVERSAL();
2140 boot_core_xsutils();
2143 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2145 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2151 # ifdef HAS_SOCKS5_INIT
2152 socks5_init(argv[0]);
2158 init_predump_symbols();
2159 /* init_postdump_symbols not currently designed to be called */
2160 /* more than once (ENV isn't cleared first, for example) */
2161 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2163 init_postdump_symbols(argc,argv,env);
2165 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2166 * or explicitly in some platforms.
2167 * locale.c:Perl_init_i18nl10n() if the environment
2168 * look like the user wants to use UTF-8. */
2169 #if defined(__SYMBIAN32__)
2170 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2173 /* Requires init_predump_symbols(). */
2174 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2179 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2180 * and the default open disciplines. */
2181 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2182 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2184 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2185 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2186 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2188 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2189 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2190 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2192 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2193 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2194 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2196 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2197 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2200 sv_setpvn(sv, ":utf8\0:utf8", 11);
2202 sv_setpvn(sv, ":utf8\0", 6);
2205 sv_setpvn(sv, "\0:utf8", 6);
2211 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2212 if (strEQ(s, "unsafe"))
2213 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2214 else if (strEQ(s, "safe"))
2215 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2217 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2221 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2225 PL_xmlfp = PerlIO_stdout();
2227 PL_xmlfp = PerlIO_open(s, "w");
2229 Perl_croak(aTHX_ "Can't open %s", s);
2231 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2233 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2234 PL_madskills = atoi(s);
2235 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2241 /* now parse the script */
2243 SETERRNO(0,SS_NORMAL);
2245 #ifdef MACOS_TRADITIONAL
2246 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2248 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2250 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2251 MacPerl_MPWFileName(PL_origfilename));
2255 if (yyparse() || PL_error_count) {
2257 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2259 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2264 CopLINE_set(PL_curcop, 0);
2265 PL_curstash = PL_defstash;
2266 PL_preprocess = FALSE;
2268 SvREFCNT_dec(PL_e_script);
2276 SAVECOPFILE(PL_curcop);
2277 SAVECOPLINE(PL_curcop);
2278 gv_check(PL_defstash);
2285 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2286 dump_mstats("after compilation:");
2295 =for apidoc perl_run
2297 Tells a Perl interpreter to run. See L<perlembed>.
2310 PERL_UNUSED_ARG(my_perl);
2312 oldscope = PL_scopestack_ix;
2320 cxstack_ix = -1; /* start context stack again */
2322 case 0: /* normal completion */
2326 case 2: /* my_exit() */
2327 while (PL_scopestack_ix > oldscope)
2330 PL_curstash = PL_defstash;
2331 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2332 PL_endav && !PL_minus_c)
2333 call_list(oldscope, PL_endav);
2335 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2336 dump_mstats("after execution: ");
2342 POPSTACK_TO(PL_mainstack);
2345 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2357 S_run_body(pTHX_ I32 oldscope)
2360 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2361 PL_sawampersand ? "Enabling" : "Omitting"));
2363 if (!PL_restartop) {
2367 exit(0); /* less likely to core dump than my_exit(0) */
2370 DEBUG_x(dump_all());
2373 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2375 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2379 #ifdef MACOS_TRADITIONAL
2380 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2381 (gMacPerl_ErrorFormat ? "# " : ""),
2382 MacPerl_MPWFileName(PL_origfilename));
2384 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2388 if (PERLDB_SINGLE && PL_DBsingle)
2389 sv_setiv(PL_DBsingle, 1);
2391 call_list(oldscope, PL_initav);
2397 PL_op = PL_restartop;
2401 else if (PL_main_start) {
2402 CvDEPTH(PL_main_cv) = 1;
2403 PL_op = PL_main_start;
2411 =head1 SV Manipulation Functions
2413 =for apidoc p||get_sv
2415 Returns the SV of the specified Perl scalar. If C<create> is set and the
2416 Perl variable does not exist then it will be created. If C<create> is not
2417 set and the variable does not exist then NULL is returned.
2423 Perl_get_sv(pTHX_ const char *name, I32 create)
2426 gv = gv_fetchpv(name, create, SVt_PV);
2433 =head1 Array Manipulation Functions
2435 =for apidoc p||get_av
2437 Returns the AV of the specified Perl array. If C<create> is set and the
2438 Perl variable does not exist then it will be created. If C<create> is not
2439 set and the variable does not exist then NULL is returned.
2445 Perl_get_av(pTHX_ const char *name, I32 create)
2447 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2456 =head1 Hash Manipulation Functions
2458 =for apidoc p||get_hv
2460 Returns the HV of the specified Perl hash. If C<create> is set and the
2461 Perl variable does not exist then it will be created. If C<create> is not
2462 set and the variable does not exist then NULL is returned.
2468 Perl_get_hv(pTHX_ const char *name, I32 create)
2470 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2479 =head1 CV Manipulation Functions
2481 =for apidoc p||get_cvn_flags
2483 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2484 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2485 exist then it will be declared (which has the same effect as saying
2486 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2487 then NULL is returned.
2489 =for apidoc p||get_cv
2491 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2497 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2499 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2500 /* XXX unsafe for threads if eval_owner isn't held */
2501 /* XXX this is probably not what they think they're getting.
2502 * It has the same effect as "sub name;", i.e. just a forward
2504 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2505 SV *const sv = newSVpvn(name,len);
2506 SvFLAGS(sv) |= flags & SVf_UTF8;
2507 return newSUB(start_subparse(FALSE, 0),
2508 newSVOP(OP_CONST, 0, sv),
2517 Perl_get_cv(pTHX_ const char *name, I32 flags)
2519 return get_cvn_flags(name, strlen(name), flags);
2522 /* Be sure to refetch the stack pointer after calling these routines. */
2526 =head1 Callback Functions
2528 =for apidoc p||call_argv
2530 Performs a callback to the specified Perl sub. See L<perlcall>.
2536 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2538 /* See G_* flags in cop.h */
2539 /* null terminated arg list */
2547 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2552 return call_pv(sub_name, flags);
2556 =for apidoc p||call_pv
2558 Performs a callback to the specified Perl sub. See L<perlcall>.
2564 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2565 /* name of the subroutine */
2566 /* See G_* flags in cop.h */
2568 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2572 =for apidoc p||call_method
2574 Performs a callback to the specified Perl method. The blessed object must
2575 be on the stack. See L<perlcall>.
2581 Perl_call_method(pTHX_ const char *methname, I32 flags)
2582 /* name of the subroutine */
2583 /* See G_* flags in cop.h */
2585 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2588 /* May be called with any of a CV, a GV, or an SV containing the name. */
2590 =for apidoc p||call_sv
2592 Performs a callback to the Perl sub whose name is in the SV. See
2599 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2600 /* See G_* flags in cop.h */
2603 LOGOP myop; /* fake syntax tree node */
2608 bool oldcatch = CATCH_GET;
2610 OP* const oldop = PL_op;
2613 if (flags & G_DISCARD) {
2618 Zero(&myop, 1, LOGOP);
2619 myop.op_next = NULL;
2620 if (!(flags & G_NOARGS))
2621 myop.op_flags |= OPf_STACKED;
2622 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2623 (flags & G_ARRAY) ? OPf_WANT_LIST :
2628 EXTEND(PL_stack_sp, 1);
2629 *++PL_stack_sp = sv;
2631 oldscope = PL_scopestack_ix;
2633 if (PERLDB_SUB && PL_curstash != PL_debstash
2634 /* Handle first BEGIN of -d. */
2635 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2636 /* Try harder, since this may have been a sighandler, thus
2637 * curstash may be meaningless. */
2638 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2639 && !(flags & G_NODEBUG))
2640 PL_op->op_private |= OPpENTERSUB_DB;
2642 if (flags & G_METHOD) {
2643 Zero(&method_op, 1, UNOP);
2644 method_op.op_next = PL_op;
2645 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2646 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2647 PL_op = (OP*)&method_op;
2650 if (!(flags & G_EVAL)) {
2652 CALL_BODY_SUB((OP*)&myop);
2653 retval = PL_stack_sp - (PL_stack_base + oldmark);
2654 CATCH_SET(oldcatch);
2657 myop.op_other = (OP*)&myop;
2659 create_eval_scope(flags|G_FAKINGEVAL);
2667 CALL_BODY_SUB((OP*)&myop);
2668 retval = PL_stack_sp - (PL_stack_base + oldmark);
2669 if (!(flags & G_KEEPERR))
2670 sv_setpvn(ERRSV,"",0);
2676 /* my_exit() was called */
2677 PL_curstash = PL_defstash;
2680 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2681 Perl_croak(aTHX_ "Callback called exit");
2686 PL_op = PL_restartop;
2690 PL_stack_sp = PL_stack_base + oldmark;
2691 if (flags & G_ARRAY)
2695 *++PL_stack_sp = &PL_sv_undef;
2700 if (PL_scopestack_ix > oldscope)
2701 delete_eval_scope();
2705 if (flags & G_DISCARD) {
2706 PL_stack_sp = PL_stack_base + oldmark;
2715 /* Eval a string. The G_EVAL flag is always assumed. */
2718 =for apidoc p||eval_sv
2720 Tells Perl to C<eval> the string in the SV.
2726 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2728 /* See G_* flags in cop.h */
2732 UNOP myop; /* fake syntax tree node */
2733 VOL I32 oldmark = SP - PL_stack_base;
2736 OP* const oldop = PL_op;
2739 if (flags & G_DISCARD) {
2746 Zero(PL_op, 1, UNOP);
2747 EXTEND(PL_stack_sp, 1);
2748 *++PL_stack_sp = sv;
2750 if (!(flags & G_NOARGS))
2751 myop.op_flags = OPf_STACKED;
2752 myop.op_next = NULL;
2753 myop.op_type = OP_ENTEREVAL;
2754 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2755 (flags & G_ARRAY) ? OPf_WANT_LIST :
2757 if (flags & G_KEEPERR)
2758 myop.op_flags |= OPf_SPECIAL;
2760 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2761 * before a PUSHEVAL, which corrupts the stack after a croak */
2762 TAINT_PROPER("eval_sv()");
2768 CALL_BODY_EVAL((OP*)&myop);
2769 retval = PL_stack_sp - (PL_stack_base + oldmark);
2770 if (!(flags & G_KEEPERR))
2771 sv_setpvn(ERRSV,"",0);
2777 /* my_exit() was called */
2778 PL_curstash = PL_defstash;
2781 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2782 Perl_croak(aTHX_ "Callback called exit");
2787 PL_op = PL_restartop;
2791 PL_stack_sp = PL_stack_base + oldmark;
2792 if (flags & G_ARRAY)
2796 *++PL_stack_sp = &PL_sv_undef;
2802 if (flags & G_DISCARD) {
2803 PL_stack_sp = PL_stack_base + oldmark;
2813 =for apidoc p||eval_pv
2815 Tells Perl to C<eval> the given string and return an SV* result.
2821 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2825 SV* sv = newSVpv(p, 0);
2827 eval_sv(sv, G_SCALAR);
2834 if (croak_on_error && SvTRUE(ERRSV)) {
2835 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2841 /* Require a module. */
2844 =head1 Embedding Functions
2846 =for apidoc p||require_pv
2848 Tells Perl to C<require> the file named by the string argument. It is
2849 analogous to the Perl code C<eval "require '$file'">. It's even
2850 implemented that way; consider using load_module instead.
2855 Perl_require_pv(pTHX_ const char *pv)
2860 PUSHSTACKi(PERLSI_REQUIRE);
2862 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2863 eval_sv(sv_2mortal(sv), G_DISCARD);
2869 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2871 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2874 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2878 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2880 /* This message really ought to be max 23 lines.
2881 * Removed -h because the user already knows that option. Others? */
2883 static const char * const usage_msg[] = {
2884 "-0[octal] specify record separator (\\0, if no argument)",
2885 "-A[mod][=pattern] activate all/given assertions",
2886 "-a autosplit mode with -n or -p (splits $_ into @F)",
2887 "-C[number/list] enables the listed Unicode features",
2888 "-c check syntax only (runs BEGIN and CHECK blocks)",
2889 "-d[:debugger] run program under debugger",
2890 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2891 "-e program one line of program (several -e's allowed, omit programfile)",
2892 "-E program like -e, but enables all optional features",
2893 "-f don't do $sitelib/sitecustomize.pl at startup",
2894 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2895 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2896 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2897 "-l[octal] enable line ending processing, specifies line terminator",
2898 "-[mM][-]module execute \"use/no module...\" before executing program",
2899 "-n assume \"while (<>) { ... }\" loop around program",
2900 "-p assume loop like -n but print line also, like sed",
2901 "-P run program through C preprocessor before compilation",
2902 "-s enable rudimentary parsing for switches after programfile",
2903 "-S look for programfile using PATH environment variable",
2904 "-t enable tainting warnings",
2905 "-T enable tainting checks",
2906 "-u dump core after parsing program",
2907 "-U allow unsafe operations",
2908 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2909 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2910 "-w enable many useful warnings (RECOMMENDED)",
2911 "-W enable all warnings",
2912 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2913 "-X disable all warnings",
2917 const char * const *p = usage_msg;
2919 PerlIO_printf(PerlIO_stdout(),
2920 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2923 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2926 /* convert a string of -D options (or digits) into an int.
2927 * sets *s to point to the char after the options */
2931 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2933 static const char * const usage_msgd[] = {
2934 " Debugging flag values: (see also -d)",
2935 " p Tokenizing and parsing (with v, displays parse stack)",
2936 " s Stack snapshots (with v, displays all stacks)",
2937 " l Context (loop) stack processing",
2938 " t Trace execution",
2939 " o Method and overloading resolution",
2940 " c String/numeric conversions",
2941 " P Print profiling info, preprocessor command for -P, source file input state",
2942 " m Memory allocation",
2943 " f Format processing",
2944 " r Regular expression parsing and execution",
2945 " x Syntax tree dump",
2946 " u Tainting checks",
2947 " H Hash dump -- usurps values()",
2948 " X Scratchpad allocation",
2950 " S Thread synchronization",
2952 " R Include reference counts of dumped variables (eg when using -Ds)",
2953 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2954 " v Verbose: use in conjunction with other flags",
2956 " A Consistency checks on internal structures",
2957 " q quiet - currently only suppresses the 'EXECUTING' message",
2962 /* if adding extra options, remember to update DEBUG_MASK */
2963 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2965 for (; isALNUM(**s); (*s)++) {
2966 const char * const d = strchr(debopts,**s);
2968 i |= 1 << (d - debopts);
2969 else if (ckWARN_d(WARN_DEBUGGING))
2970 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2971 "invalid option -D%c, use -D'' to see choices\n", **s);
2974 else if (isDIGIT(**s)) {
2976 for (; isALNUM(**s); (*s)++) ;
2978 else if (givehelp) {
2979 const char *const *p = usage_msgd;
2980 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2983 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2984 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2985 "-Dp not implemented on this platform\n");
2991 /* This routine handles any switches that can be given during run */
2994 Perl_moreswitches(pTHX_ char *s)
3005 SvREFCNT_dec(PL_rs);
3006 if (s[1] == 'x' && s[2]) {
3007 const char *e = s+=2;
3013 flags = PERL_SCAN_SILENT_ILLDIGIT;
3014 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3015 if (s + numlen < e) {
3016 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3020 PL_rs = newSVpvs("");
3021 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3022 tmps = (U8*)SvPVX(PL_rs);
3023 uvchr_to_utf8(tmps, rschar);
3024 SvCUR_set(PL_rs, UNISKIP(rschar));
3029 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3030 if (rschar & ~((U8)~0))
3031 PL_rs = &PL_sv_undef;
3032 else if (!rschar && numlen >= 2)
3033 PL_rs = newSVpvs("");
3035 char ch = (char)rschar;
3036 PL_rs = newSVpvn(&ch, 1);
3039 sv_setsv(get_sv("/", TRUE), PL_rs);
3044 PL_unicode = parse_unicode_opts( (const char **)&s );
3045 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3051 while (*s && !isSPACE(*s)) ++s;
3052 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3063 forbid_setid('d', -1);
3066 /* -dt indicates to the debugger that threads will be used */
3067 if (*s == 't' && !isALNUM(s[1])) {
3069 my_setenv("PERL5DB_THREADED", "1");
3072 /* The following permits -d:Mod to accepts arguments following an =
3073 in the fashion that -MSome::Mod does. */
3074 if (*s == ':' || *s == '=') {
3076 SV * const sv = newSVpvs("use Devel::");
3078 /* We now allow -d:Module=Foo,Bar */
3079 while(isALNUM(*s) || *s==':') ++s;
3081 sv_catpv(sv, start);
3083 sv_catpvn(sv, start, s-start);
3084 /* Don't use NUL as q// delimiter here, this string goes in the
3086 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3089 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3092 PL_perldb = PERLDB_ALL;
3099 forbid_setid('D', -1);
3101 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3102 #else /* !DEBUGGING */
3103 if (ckWARN_d(WARN_DEBUGGING))
3104 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3105 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3106 for (s++; isALNUM(*s); s++) ;
3111 usage(PL_origargv[0]);
3114 Safefree(PL_inplace);
3115 #if defined(__CYGWIN__) /* do backup extension automagically */
3116 if (*(s+1) == '\0') {
3117 PL_inplace = savepvs(".bak");
3120 #endif /* __CYGWIN__ */
3122 const char * const start = ++s;
3123 while (*s && !isSPACE(*s))
3126 PL_inplace = savepvn(start, s - start);
3130 if (*s == '-') /* Additional switches on #! line. */
3134 case 'I': /* -I handled both here and in parse_body() */
3135 forbid_setid('I', -1);
3137 while (*s && isSPACE(*s))
3142 /* ignore trailing spaces (possibly followed by other switches) */
3144 for (e = p; *e && !isSPACE(*e); e++) ;
3148 } while (*p && *p != '-');
3149 e = savepvn(s, e-s);
3150 incpush(e, TRUE, TRUE, FALSE, FALSE);
3157 Perl_croak(aTHX_ "No directory specified for -I");
3163 SvREFCNT_dec(PL_ors_sv);
3169 PL_ors_sv = newSVpvs("\n");
3170 numlen = 3 + (*s == '0');
3171 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3175 if (RsPARA(PL_rs)) {
3176 PL_ors_sv = newSVpvs("\n\n");
3179 PL_ors_sv = newSVsv(PL_rs);
3184 forbid_setid('A', -1);
3186 PL_preambleav = newAV();
3189 char * const start = s;
3190 SV * const sv = newSVpvs("use assertions::activate");
3191 while(isALNUM(*s) || *s == ':') ++s;
3193 sv_catpvs(sv, "::");
3194 sv_catpvn(sv, start, s-start);
3197 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3200 else if (*s != '\0') {
3201 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3203 av_push(PL_preambleav, sv);
3207 forbid_setid('M', -1); /* XXX ? */
3210 forbid_setid('m', -1); /* XXX ? */
3214 const char *use = "use ";
3215 /* -M-foo == 'no foo' */
3216 /* Leading space on " no " is deliberate, to make both
3217 possibilities the same length. */
3218 if (*s == '-') { use = " no "; ++s; }
3219 sv = newSVpvn(use,4);
3221 /* We allow -M'Module qw(Foo Bar)' */
3222 while(isALNUM(*s) || *s==':') ++s;
3224 sv_catpv(sv, start);
3225 if (*(start-1) == 'm') {
3227 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3228 sv_catpvs( sv, " ()");
3232 Perl_croak(aTHX_ "Module name required with -%c option",
3234 sv_catpvn(sv, start, s-start);
3235 sv_catpvs(sv, " split(/,/,q");
3236 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3238 sv_catpvs(sv, "\0)");
3242 PL_preambleav = newAV();
3243 av_push(PL_preambleav, sv);
3246 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3257 forbid_setid('s', -1);
3258 PL_doswitches = TRUE;
3272 #ifdef MACOS_TRADITIONAL
3273 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3275 PL_do_undump = TRUE;
3283 if (!sv_derived_from(PL_patchlevel, "version"))
3284 upg_version(PL_patchlevel);
3286 PerlIO_printf(PerlIO_stdout(),
3287 Perl_form(aTHX_ "\nThis is perl, %"SVf
3288 #ifdef PERL_PATCHNUM
3289 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3292 SVfARG(vstringify(PL_patchlevel)),
3295 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3296 PerlIO_printf(PerlIO_stdout(),
3297 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3298 SVfARG(vstringify(PL_patchlevel))));
3299 PerlIO_printf(PerlIO_stdout(),
3300 Perl_form(aTHX_ " built under %s at %s %s\n",
3301 OSNAME, __DATE__, __TIME__));
3302 PerlIO_printf(PerlIO_stdout(),
3303 Perl_form(aTHX_ " OS Specific Release: %s\n",
3307 #if defined(LOCAL_PATCH_COUNT)
3308 if (LOCAL_PATCH_COUNT > 0)
3309 PerlIO_printf(PerlIO_stdout(),
3310 "\n(with %d registered patch%s, "
3311 "see perl -V for more detail)",
3313 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3316 PerlIO_printf(PerlIO_stdout(),
3317 "\n\nCopyright 1987-2007, Larry Wall\n");
3318 #ifdef MACOS_TRADITIONAL
3319 PerlIO_printf(PerlIO_stdout(),
3320 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3321 "maintained by Chris Nandor\n");
3324 PerlIO_printf(PerlIO_stdout(),
3325 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3330 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3333 PerlIO_printf(PerlIO_stdout(),
3334 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3335 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "atariST series port, ++jrb bammi@cadence.com\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3366 PerlIO_printf(PerlIO_stdout(),
3367 "MiNT port by Guido Flohr, 1997-1999\n");
3370 PerlIO_printf(PerlIO_stdout(),
3371 "EPOC port by Olaf Flebbe, 1999-2002\n");
3374 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3375 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3378 #ifdef __SYMBIAN32__
3379 PerlIO_printf(PerlIO_stdout(),
3380 "Symbian port by Nokia, 2004-2005\n");
3382 #ifdef BINARY_BUILD_NOTICE
3383 BINARY_BUILD_NOTICE;
3385 PerlIO_printf(PerlIO_stdout(),
3387 Perl may be copied only under the terms of either the Artistic License or the\n\
3388 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3389 Complete documentation for Perl, including FAQ lists, should be found on\n\
3390 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3391 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3394 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3395 PL_dowarn |= G_WARN_ON;
3400 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3401 if (!specialWARN(PL_compiling.cop_warnings))
3402 PerlMemShared_free(PL_compiling.cop_warnings);
3403 PL_compiling.cop_warnings = pWARN_ALL ;
3407 PL_dowarn = G_WARN_ALL_OFF;
3408 if (!specialWARN(PL_compiling.cop_warnings))
3409 PerlMemShared_free(PL_compiling.cop_warnings);
3410 PL_compiling.cop_warnings = pWARN_NONE ;
3415 if (s[1] == '-') /* Additional switches on #! line. */
3420 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3426 #ifdef ALTERNATE_SHEBANG
3427 case 'S': /* OS/2 needs -S on "extproc" line. */
3435 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3440 /* compliments of Tom Christiansen */
3442 /* unexec() can be found in the Gnu emacs distribution */
3443 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3446 Perl_my_unexec(pTHX)
3448 PERL_UNUSED_CONTEXT;
3450 SV * prog = newSVpv(BIN_EXP, 0);
3451 SV * file = newSVpv(PL_origfilename, 0);
3455 sv_catpvs(prog, "/perl");
3456 sv_catpvs(file, ".perldump");
3458 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3459 /* unexec prints msg to stderr in case of failure */
3460 PerlProc_exit(status);
3463 # include <lib$routines.h>
3464 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3465 # elif defined(WIN32) || defined(__CYGWIN__)
3466 Perl_croak(aTHX_ "dump is not supported");
3468 ABORT(); /* for use with undump */
3473 /* initialize curinterp */
3479 # define PERLVAR(var,type)
3480 # define PERLVARA(var,n,type)
3481 # if defined(PERL_IMPLICIT_CONTEXT)
3482 # define PERLVARI(var,type,init) aTHX->var = init;
3483 # define PERLVARIC(var,type,init) aTHX->var = init;
3485 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3486 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3488 # include "intrpvar.h"
3489 # include "thrdvar.h"
3495 # define PERLVAR(var,type)
3496 # define PERLVARA(var,n,type)
3497 # define PERLVARI(var,type,init) PL_##var = init;
3498 # define PERLVARIC(var,type,init) PL_##var = init;
3499 # include "intrpvar.h"
3500 # include "thrdvar.h"
3507 /* As these are inside a structure, PERLVARI isn't capable of initialising
3509 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3510 PL_reg_poscache = PL_reg_starttry = NULL;
3514 S_init_main_stash(pTHX)
3519 PL_curstash = PL_defstash = newHV();
3520 /* We know that the string "main" will be in the global shared string
3521 table, so it's a small saving to use it rather than allocate another
3523 PL_curstname = newSVpvs_share("main");
3524 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3525 /* If we hadn't caused another reference to "main" to be in the shared
3526 string table above, then it would be worth reordering these two,
3527 because otherwise all we do is delete "main" from it as a consequence
3528 of the SvREFCNT_dec, only to add it again with hv_name_set */
3529 SvREFCNT_dec(GvHV(gv));
3530 hv_name_set(PL_defstash, "main", 4, 0);
3531 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3533 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3535 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3536 GvMULTI_on(PL_incgv);
3537 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3538 GvMULTI_on(PL_hintgv);
3539 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3540 SvREFCNT_inc_simple(PL_defgv);
3541 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3542 SvREFCNT_inc_simple(PL_errgv);
3543 GvMULTI_on(PL_errgv);
3544 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3545 GvMULTI_on(PL_replgv);
3546 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3547 #ifdef PERL_DONT_CREATE_GVSV
3550 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3551 sv_setpvn(ERRSV, "", 0);
3552 PL_curstash = PL_defstash;
3553 CopSTASH_set(&PL_compiling, PL_defstash);
3554 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3555 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3557 /* We must init $/ before switches are processed. */
3558 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3562 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3568 const char *cpp_discard_flag;
3577 PL_origfilename = savepvs("-e");
3580 /* if find_script() returns, it returns a malloc()-ed value */
3581 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3583 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3584 const char *s = scriptname + 8;
3590 * Tell apart "normal" usage of fdscript, e.g.
3591 * with bash on FreeBSD:
3592 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3593 * from usage in suidperl.
3594 * Does any "normal" usage leave garbage after the number???
3595 * Is it a mistake to use a similar /dev/fd/ construct for
3600 * Be supersafe and do some sanity-checks.
3601 * Still, can we be sure we got the right thing?
3604 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3607 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3609 scriptname = savepv(s + 1);
3610 Safefree(PL_origfilename);
3611 PL_origfilename = (char *)scriptname;
3616 CopFILE_free(PL_curcop);
3617 CopFILE_set(PL_curcop, PL_origfilename);
3618 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3619 scriptname = (char *)"";
3620 if (fdscript >= 0) {
3621 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3622 # if defined(HAS_FCNTL) && defined(F_SETFD)
3624 /* ensure close-on-exec */
3625 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3630 Perl_croak(aTHX_ "sperl needs fd script\n"
3631 "You should not call sperl directly; do you need to "
3632 "change a #! line\nfrom sperl to perl?\n");
3635 * Do not open (or do other fancy stuff) while setuid.
3636 * Perl does the open, and hands script to suidperl on a fd;
3637 * suidperl only does some checks, sets up UIDs and re-execs
3638 * perl with that fd as it has always done.
3641 if (*suidscript != 1) {
3642 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3645 else if (PL_preprocess) {
3646 const char * const cpp_cfg = CPPSTDIN;
3647 SV * const cpp = newSVpvs("");
3648 SV * const cmd = newSV(0);
3650 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3651 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3652 if (strEQ(cpp_cfg, "cppstdin"))
3653 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3654 sv_catpv(cpp, cpp_cfg);
3657 sv_catpvs(sv, "-I");
3658 sv_catpv(sv,PRIVLIB_EXP);
3661 DEBUG_P(PerlIO_printf(Perl_debug_log,
3662 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3663 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3666 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3673 cpp_discard_flag = "";
3675 cpp_discard_flag = "-C";
3679 perl = os2_execname(aTHX);
3681 perl = PL_origargv[0];
3685 /* This strips off Perl comments which might interfere with
3686 the C pre-processor, including #!. #line directives are
3687 deliberately stripped to avoid confusion with Perl's version
3688 of #line. FWP played some golf with it so it will fit
3689 into VMS's 255 character buffer.
3692 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3694 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3696 Perl_sv_setpvf(aTHX_ cmd, "\
3697 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3698 perl, quote, code, quote, scriptname, SVfARG(cpp),
3699 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3701 PL_doextract = FALSE;
3703 DEBUG_P(PerlIO_printf(Perl_debug_log,
3704 "PL_preprocess: cmd=\"%s\"\n",
3707 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3711 else if (!*scriptname) {
3712 forbid_setid(0, *suidscript);
3713 PL_rsfp = PerlIO_stdin();
3716 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3717 # if defined(HAS_FCNTL) && defined(F_SETFD)
3719 /* ensure close-on-exec */
3720 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3723 #endif /* IAMSUID */
3725 /* PSz 16 Sep 03 Keep neat error message */
3727 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3729 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3730 CopFILE(PL_curcop), Strerror(errno));
3736 * I_SYSSTATVFS HAS_FSTATVFS
3738 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3739 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3740 * here so that metaconfig picks them up. */
3744 S_fd_on_nosuid_fs(pTHX_ int fd)
3747 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3748 * but is needed also on machines without setreuid.
3749 * Seems safe enough to run as root.
3751 int check_okay = 0; /* able to do all the required sys/libcalls */
3752 int on_nosuid = 0; /* the fd is on a nosuid fs */
3754 * Need to check noexec also: nosuid might not be set, the average
3755 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3757 int on_noexec = 0; /* the fd is on a noexec fs */
3760 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3761 * fstatvfs() is UNIX98.
3762 * fstatfs() is 4.3 BSD.
3763 * ustat()+getmnt() is pre-4.3 BSD.
3764 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3765 * an irrelevant filesystem while trying to reach the right one.
3768 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3770 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3771 defined(HAS_FSTATVFS)
3772 # define FD_ON_NOSUID_CHECK_OKAY
3773 struct statvfs stfs;
3775 check_okay = fstatvfs(fd, &stfs) == 0;
3776 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3778 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3779 on platforms where it is present. */
3780 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3782 # endif /* fstatvfs */
3784 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3785 defined(PERL_MOUNT_NOSUID) && \
3786 defined(PERL_MOUNT_NOEXEC) && \
3787 defined(HAS_FSTATFS) && \
3788 defined(HAS_STRUCT_STATFS) && \
3789 defined(HAS_STRUCT_STATFS_F_FLAGS)
3790 # define FD_ON_NOSUID_CHECK_OKAY
3793 check_okay = fstatfs(fd, &stfs) == 0;
3794 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3795 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3796 # endif /* fstatfs */
3798 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3799 defined(PERL_MOUNT_NOSUID) && \
3800 defined(PERL_MOUNT_NOEXEC) && \
3801 defined(HAS_FSTAT) && \
3802 defined(HAS_USTAT) && \
3803 defined(HAS_GETMNT) && \
3804 defined(HAS_STRUCT_FS_DATA) && \
3806 # define FD_ON_NOSUID_CHECK_OKAY
3809 if (fstat(fd, &fdst) == 0) {
3811 if (ustat(fdst.st_dev, &us) == 0) {
3813 /* NOSTAT_ONE here because we're not examining fields which
3814 * vary between that case and STAT_ONE. */
3815 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3816 size_t cmplen = sizeof(us.f_fname);
3817 if (sizeof(fsd.fd_req.path) < cmplen)
3818 cmplen = sizeof(fsd.fd_req.path);
3819 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3820 fdst.st_dev == fsd.fd_req.dev) {
3822 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3823 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3828 # endif /* fstat+ustat+getmnt */
3830 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3831 defined(HAS_GETMNTENT) && \
3832 defined(HAS_HASMNTOPT) && \
3833 defined(MNTOPT_NOSUID) && \
3834 defined(MNTOPT_NOEXEC)
3835 # define FD_ON_NOSUID_CHECK_OKAY
3836 FILE *mtab = fopen("/etc/mtab", "r");
3837 struct mntent *entry;
3840 if (mtab && (fstat(fd, &stb) == 0)) {
3841 while (entry = getmntent(mtab)) {
3842 if (stat(entry->mnt_dir, &fsb) == 0
3843 && fsb.st_dev == stb.st_dev)
3845 /* found the filesystem */
3847 if (hasmntopt(entry, MNTOPT_NOSUID))
3849 if (hasmntopt(entry, MNTOPT_NOEXEC))
3852 } /* A single fs may well fail its stat(). */
3857 # endif /* getmntent+hasmntopt */
3860 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3862 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3864 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3865 return ((!check_okay) || on_nosuid || on_noexec);
3867 #endif /* IAMSUID */
3870 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3871 int fdscript, int suidscript)
3876 #endif /* IAMSUID */
3878 /* do we need to emulate setuid on scripts? */
3880 /* This code is for those BSD systems that have setuid #! scripts disabled
3881 * in the kernel because of a security problem. Merely defining DOSUID
3882 * in perl will not fix that problem, but if you have disabled setuid
3883 * scripts in the kernel, this will attempt to emulate setuid and setgid
3884 * on scripts that have those now-otherwise-useless bits set. The setuid
3885 * root version must be called suidperl or sperlN.NNN. If regular perl
3886 * discovers that it has opened a setuid script, it calls suidperl with
3887 * the same argv that it had. If suidperl finds that the script it has
3888 * just opened is NOT setuid root, it sets the effective uid back to the
3889 * uid. We don't just make perl setuid root because that loses the
3890 * effective uid we had before invoking perl, if it was different from the
3893 * Description/comments above do not match current workings:
3894 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3895 * suidperl called with script open and name changed to /dev/fd/N/X;
3896 * suidperl croaks if script is not setuid;
3897 * making perl setuid would be a huge security risk (and yes, that
3898 * would lose any euid we might have had).
3900 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3901 * be defined in suidperl only. suidperl must be setuid root. The
3902 * Configure script will set this up for you if you want it.
3908 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3909 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3910 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3912 const char *linestr;
3916 if (fdscript < 0 || suidscript != 1)
3917 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3919 * Since the script is opened by perl, not suidperl, some of these
3920 * checks are superfluous. Leaving them in probably does not lower
3924 * Do checks even for systems with no HAS_SETREUID.
3925 * We used to swap, then re-swap UIDs with
3927 if (setreuid(PL_euid,PL_uid) < 0
3928 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3929 Perl_croak(aTHX_ "Can't swap uid and euid");
3932 if (setreuid(PL_uid,PL_euid) < 0
3933 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3934 Perl_croak(aTHX_ "Can't reswap uid and euid");
3938 /* On this access check to make sure the directories are readable,
3939 * there is actually a small window that the user could use to make
3940 * filename point to an accessible directory. So there is a faint
3941 * chance that someone could execute a setuid script down in a
3942 * non-accessible directory. I don't know what to do about that.
3943 * But I don't think it's too important. The manual lies when
3944 * it says access() is useful in setuid programs.
3946 * So, access() is pretty useless... but not harmful... do anyway.
3948 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3949 Perl_croak(aTHX_ "Can't access() script\n");
3952 /* If we can swap euid and uid, then we can determine access rights
3953 * with a simple stat of the file, and then compare device and
3954 * inode to make sure we did stat() on the same file we opened.
3955 * Then we just have to make sure he or she can execute it.
3958 * As the script is opened by perl, not suidperl, we do not need to
3959 * care much about access rights.
3961 * The 'script changed' check is needed, or we can get lied to
3962 * about $0 with e.g.
3963 * suidperl /dev/fd/4//bin/x 4<setuidscript
3964 * Without HAS_SETREUID, is it safe to stat() as root?
3966 * Are there any operating systems that pass /dev/fd/xxx for setuid
3967 * scripts, as suggested/described in perlsec(1)? Surely they do not
3968 * pass the script name as we do, so the "script changed" test would
3969 * fail for them... but we never get here with
3970 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3972 * This is one place where we must "lie" about return status: not
3973 * say if the stat() failed. We are doing this as root, and could
3974 * be tricked into reporting existence or not of files that the
3975 * "plain" user cannot even see.
3979 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3980 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3981 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3982 Perl_croak(aTHX_ "Setuid script changed\n");
3986 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3987 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3990 * We used to do this check as the "plain" user (after swapping
3991 * UIDs). But the check for nosuid and noexec filesystem is needed,
3992 * and should be done even without HAS_SETREUID. (Maybe those
3993 * operating systems do not have such mount options anyway...)
3994 * Seems safe enough to do as root.
3996 #if !defined(NO_NOSUID_CHECK)
3997 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3998 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4001 #endif /* IAMSUID */
4003 if (!S_ISREG(PL_statbuf.st_mode)) {
4004 Perl_croak(aTHX_ "Setuid script not plain file\n");
4006 if (PL_statbuf.st_mode & S_IWOTH)
4007 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4008 PL_doswitches = FALSE; /* -s is insecure in suid */
4009 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4010 CopLINE_inc(PL_curcop);
4011 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4012 Perl_croak(aTHX_ "No #! line");
4013 linestr = SvPV_nolen_const(PL_linestr);
4014 /* required even on Sys V */
4015 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4016 Perl_croak(aTHX_ "No #! line");
4020 /* Sanity check on line length */
4021 s_end = s + strlen(s);
4022 if (s_end == s || (s_end - s) > 4000)
4023 Perl_croak(aTHX_ "Very long #! line");
4024 /* Allow more than a single space after #! */
4025 while (isSPACE(*s)) s++;
4026 /* Sanity check on buffer end */
4027 while ((*s) && !isSPACE(*s)) s++;
4028 for (s2 = s; (s2 > linestr &&
4029 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4030 || s2[-1] == '-')); s2--) ;
4031 /* Sanity check on buffer start */
4032 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4033 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4034 Perl_croak(aTHX_ "Not a perl script");
4035 while (*s == ' ' || *s == '\t') s++;
4037 * #! arg must be what we saw above. They can invoke it by
4038 * mentioning suidperl explicitly, but they may not add any strange
4039 * arguments beyond what #! says if they do invoke suidperl that way.
4042 * The way validarg was set up, we rely on the kernel to start
4043 * scripts with argv[1] set to contain all #! line switches (the
4047 * Check that we got all the arguments listed in the #! line (not
4048 * just that there are no extraneous arguments). Might not matter
4049 * much, as switches from #! line seem to be acted upon (also), and
4050 * so may be checked and trapped in perl. But, security checks must
4051 * be done in suidperl and not deferred to perl. Note that suidperl
4052 * does not get around to parsing (and checking) the switches on
4053 * the #! line (but execs perl sooner).
4054 * Allow (require) a trailing newline (which may be of two
4055 * characters on some architectures?) (but no other trailing
4058 len = strlen(validarg);
4059 if (strEQ(validarg," PHOOEY ") ||
4060 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4061 !((s_end - s) == len+1
4062 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4063 Perl_croak(aTHX_ "Args must match #! line");
4067 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4068 PL_euid == PL_statbuf.st_uid)
4070 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4071 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4072 #endif /* IAMSUID */
4075 PL_euid) { /* oops, we're not the setuid root perl */
4077 * When root runs a setuid script, we do not go through the same
4078 * steps of execing sperl and then perl with fd scripts, but
4079 * simply set up UIDs within the same perl invocation; so do
4080 * not have the same checks (on options, whatever) that we have
4081 * for plain users. No problem really: would have to be a script
4082 * that does not actually work for plain users; and if root is
4083 * foolish and can be persuaded to run such an unsafe script, he
4084 * might run also non-setuid ones, and deserves what he gets.
4086 * Or, we might drop the PL_euid check above (and rely just on
4087 * fdscript to avoid loops), and do the execs
4093 * Pass fd script to suidperl.
4094 * Exec suidperl, substituting fd script for scriptname.
4095 * Pass script name as "subdir" of fd, which perl will grok;
4096 * in fact will use that to distinguish this from "normal"
4097 * usage, see comments above.
4099 PerlIO_rewind(PL_rsfp);
4100 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4101 /* PSz 27 Feb 04 Sanity checks on scriptname */
4102 if ((!scriptname) || (!*scriptname) ) {
4103 Perl_croak(aTHX_ "No setuid script name\n");
4105 if (*scriptname == '-') {
4106 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4107 /* Or we might confuse it with an option when replacing
4108 * name in argument list, below (though we do pointer, not
4109 * string, comparisons).
4112 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4113 if (!PL_origargv[which]) {
4114 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4116 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4117 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4118 #if defined(HAS_FCNTL) && defined(F_SETFD)
4119 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4122 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4123 (int)PERL_REVISION, (int)PERL_VERSION,
4124 (int)PERL_SUBVERSION), PL_origargv);
4126 #endif /* IAMSUID */
4127 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4130 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4132 * This seems back to front: we try HAS_SETEGID first; if not available
4133 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4134 * in the sense that we only want to set EGID; but are there any machines
4135 * with either of the latter, but not the former? Same with UID, later.
4138 (void)setegid(PL_statbuf.st_gid);
4141 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4143 #ifdef HAS_SETRESGID
4144 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4146 PerlProc_setgid(PL_statbuf.st_gid);
4150 if (PerlProc_getegid() != PL_statbuf.st_gid)
4151 Perl_croak(aTHX_ "Can't do setegid!\n");
4153 if (PL_statbuf.st_mode & S_ISUID) {
4154 if (PL_statbuf.st_uid != PL_euid)
4156 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4159 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4161 #ifdef HAS_SETRESUID
4162 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4164 PerlProc_setuid(PL_statbuf.st_uid);
4168 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4169 Perl_croak(aTHX_ "Can't do seteuid!\n");
4171 else if (PL_uid) { /* oops, mustn't run as root */
4173 (void)seteuid((Uid_t)PL_uid);
4176 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4178 #ifdef HAS_SETRESUID
4179 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4181 PerlProc_setuid((Uid_t)PL_uid);
4185 if (PerlProc_geteuid() != PL_uid)
4186 Perl_croak(aTHX_ "Can't do seteuid!\n");
4189 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4190 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4193 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4194 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4195 else if (fdscript < 0 || suidscript != 1)
4196 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4197 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4199 /* PSz 16 Sep 03 Keep neat error message */
4200 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4203 /* We absolutely must clear out any saved ids here, so we */
4204 /* exec the real perl, substituting fd script for scriptname. */
4205 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4207 * It might be thought that using setresgid and/or setresuid (changed to
4208 * set the saved IDs) above might obviate the need to exec, and we could
4209 * go on to "do the perl thing".
4211 * Is there such a thing as "saved GID", and is that set for setuid (but
4212 * not setgid) execution like suidperl? Without exec, it would not be
4213 * cleared for setuid (but not setgid) scripts (or might need a dummy
4216 * We need suidperl to do the exact same argument checking that perl
4217 * does. Thus it cannot be very small; while it could be significantly
4218 * smaller, it is safer (simpler?) to make it essentially the same
4219 * binary as perl (but they are not identical). - Maybe could defer that
4220 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4221 * but prefer to do thorough checks in suidperl itself. Such deferral
4222 * would make suidperl security rely on perl, a design no-no.
4224 * Setuid things should be short and simple, thus easy to understand and
4225 * verify. They should do their "own thing", without influence by
4226 * attackers. It may help if their internal execution flow is fixed,
4227 * regardless of platform: it may be best to exec anyway.
4229 * Suidperl should at least be conceptually simple: a wrapper only,
4230 * never to do any real perl. Maybe we should put
4232 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4234 * into the perly bits.
4236 PerlIO_rewind(PL_rsfp);
4237 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4239 * Keep original arguments: suidperl already has fd script.
4241 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4242 /* if (!PL_origargv[which]) { */
4243 /* errno = EPERM; */
4244 /* Perl_croak(aTHX_ "Permission denied\n"); */
4246 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4247 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4248 #if defined(HAS_FCNTL) && defined(F_SETFD)
4249 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4252 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4253 (int)PERL_REVISION, (int)PERL_VERSION,
4254 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4256 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4257 #endif /* IAMSUID */
4259 PERL_UNUSED_ARG(fdscript);
4260 PERL_UNUSED_ARG(suidscript);
4261 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4262 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4263 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4264 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4266 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4269 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4270 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4271 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4272 /* not set-id, must be wrapped */
4275 PERL_UNUSED_ARG(validarg);
4276 PERL_UNUSED_ARG(scriptname);
4280 S_find_beginning(pTHX)
4284 register const char *s2;
4285 #ifdef MACOS_TRADITIONAL
4289 /* skip forward in input to the real script? */
4291 #ifdef MACOS_TRADITIONAL
4292 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4294 while (PL_doextract || gMacPerl_AlwaysExtract) {
4295 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4296 if (!gMacPerl_AlwaysExtract)
4297 Perl_croak(aTHX_ "No Perl script found in input\n");
4299 if (PL_doextract) /* require explicit override ? */
4300 if (!OverrideExtract(PL_origfilename))
4301 Perl_croak(aTHX_ "User aborted script\n");
4303 PL_doextract = FALSE;
4305 /* Pater peccavi, file does not have #! */
4306 PerlIO_rewind(PL_rsfp);
4311 while (PL_doextract) {
4312 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4313 Perl_croak(aTHX_ "No Perl script found in input\n");
4316 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4317 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4318 PL_doextract = FALSE;
4319 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4321 while (*s == ' ' || *s == '\t') s++;
4323 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4324 || s2[-1] == '_') s2--;
4325 if (strnEQ(s2-4,"perl",4))
4326 while ((s = moreswitches(s)))
4329 #ifdef MACOS_TRADITIONAL
4330 /* We are always searching for the #!perl line in MacPerl,
4331 * so if we find it, still keep the line count correct
4332 * by counting lines we already skipped over
4334 for (; maclines > 0 ; maclines--)
4335 PerlIO_ungetc(PL_rsfp, '\n');
4339 /* gMacPerl_AlwaysExtract is false in MPW tool */
4340 } else if (gMacPerl_AlwaysExtract) {
4352 PL_uid = PerlProc_getuid();
4353 PL_euid = PerlProc_geteuid();
4354 PL_gid = PerlProc_getgid();
4355 PL_egid = PerlProc_getegid();
4357 PL_uid |= PL_gid << 16;
4358 PL_euid |= PL_egid << 16;
4360 /* Should not happen: */
4361 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4362 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4365 * Should go by suidscript, not uid!=euid: why disallow
4366 * system("ls") in scripts run from setuid things?
4367 * Or, is this run before we check arguments and set suidscript?
4368 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4369 * (We never have suidscript, can we be sure to have fdscript?)
4370 * Or must then go by UID checks? See comments in forbid_setid also.
4374 /* This is used very early in the lifetime of the program,
4375 * before even the options are parsed, so PL_tainting has
4376 * not been initialized properly. */
4378 Perl_doing_taint(int argc, char *argv[], char *envp[])
4380 #ifndef PERL_IMPLICIT_SYS
4381 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4382 * before we have an interpreter-- and the whole point of this
4383 * function is to be called at such an early stage. If you are on
4384 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4385 * "tainted because running with altered effective ids', you'll
4386 * have to add your own checks somewhere in here. The two most
4387 * known samples of 'implicitness' are Win32 and NetWare, neither
4388 * of which has much of concept of 'uids'. */
4389 int uid = PerlProc_getuid();
4390 int euid = PerlProc_geteuid();
4391 int gid = PerlProc_getgid();
4392 int egid = PerlProc_getegid();
4399 if (uid && (euid != uid || egid != gid))
4401 #endif /* !PERL_IMPLICIT_SYS */
4402 /* This is a really primitive check; environment gets ignored only
4403 * if -T are the first chars together; otherwise one gets
4404 * "Too late" message. */
4405 if ( argc > 1 && argv[1][0] == '-'
4406 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4411 /* Passing the flag as a single char rather than a string is a slight space
4412 optimisation. The only message that isn't /^-.$/ is
4413 "program input from stdin", which is substituted in place of '\0', which
4414 could never be a command line flag. */
4416 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4419 char string[3] = "-x";
4420 const char *message = "program input from stdin";
4427 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4428 if (PL_euid != PL_uid)
4429 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4430 if (PL_egid != PL_gid)
4431 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4432 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4434 * Checks for UID/GID above "wrong": why disallow
4435 * perl -e 'print "Hello\n"'
4436 * from within setuid things?? Simply drop them: replaced by
4437 * fdscript/suidscript and #ifdef IAMSUID checks below.
4439 * This may be too late for command-line switches. Will catch those on
4440 * the #! line, after finding the script name and setting up
4441 * fdscript/suidscript. Note that suidperl does not get around to
4442 * parsing (and checking) the switches on the #! line, but checks that
4443 * the two sets are identical.
4445 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4446 * instead, or would that be "too late"? (We never have suidscript, can
4447 * we be sure to have fdscript?)
4449 * Catch things with suidscript (in descendant of suidperl), even with
4450 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4451 * below; but I am paranoid.
4453 * Also see comments about root running a setuid script, elsewhere.
4455 if (suidscript >= 0)
4456 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4458 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4459 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4460 #endif /* IAMSUID */
4464 Perl_init_debugger(pTHX)
4467 HV * const ostash = PL_curstash;
4469 PL_curstash = PL_debstash;
4470 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4472 AvREAL_off(PL_dbargs);
4473 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4474 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4475 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4476 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4477 sv_setiv(PL_DBsingle, 0);
4478 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4479 sv_setiv(PL_DBtrace, 0);
4480 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4481 sv_setiv(PL_DBsignal, 0);
4482 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4483 sv_setiv(PL_DBassertion, 0);
4484 PL_curstash = ostash;
4487 #ifndef STRESS_REALLOC
4488 #define REASONABLE(size) (size)
4490 #define REASONABLE(size) (1) /* unreasonable */
4494 Perl_init_stacks(pTHX)
4497 /* start with 128-item stack and 8K cxstack */
4498 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4499 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4500 PL_curstackinfo->si_type = PERLSI_MAIN;
4501 PL_curstack = PL_curstackinfo->si_stack;
4502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4504 PL_stack_base = AvARRAY(PL_curstack);
4505 PL_stack_sp = PL_stack_base;
4506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4508 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4511 PL_tmps_max = REASONABLE(128);
4513 Newx(PL_markstack,REASONABLE(32),I32);
4514 PL_markstack_ptr = PL_markstack;
4515 PL_markstack_max = PL_markstack + REASONABLE(32);
4519 Newx(PL_scopestack,REASONABLE(32),I32);
4520 PL_scopestack_ix = 0;
4521 PL_scopestack_max = REASONABLE(32);
4523 Newx(PL_savestack,REASONABLE(128),ANY);
4524 PL_savestack_ix = 0;
4525 PL_savestack_max = REASONABLE(128);
4534 while (PL_curstackinfo->si_next)
4535 PL_curstackinfo = PL_curstackinfo->si_next;
4536 while (PL_curstackinfo) {
4537 PERL_SI *p = PL_curstackinfo->si_prev;
4538 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4539 Safefree(PL_curstackinfo->si_cxstack);
4540 Safefree(PL_curstackinfo);
4541 PL_curstackinfo = p;
4543 Safefree(PL_tmps_stack);
4544 Safefree(PL_markstack);
4545 Safefree(PL_scopestack);
4546 Safefree(PL_savestack);
4556 lex_start(PL_linestr);
4558 PL_subname = newSVpvs("main");
4562 S_init_predump_symbols(pTHX)
4568 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4569 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4570 GvMULTI_on(PL_stdingv);
4571 io = GvIOp(PL_stdingv);
4572 IoTYPE(io) = IoTYPE_RDONLY;
4573 IoIFP(io) = PerlIO_stdin();
4574 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4576 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4578 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4581 IoTYPE(io) = IoTYPE_WRONLY;
4582 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4584 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4586 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4588 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4589 GvMULTI_on(PL_stderrgv);
4590 io = GvIOp(PL_stderrgv);
4591 IoTYPE(io) = IoTYPE_WRONLY;
4592 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4593 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4595 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4597 PL_statname = newSV(0); /* last filename we did stat on */
4599 Safefree(PL_osname);
4600 PL_osname = savepv(OSNAME);
4604 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4607 argc--,argv++; /* skip name of script */
4608 if (PL_doswitches) {
4609 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4613 if (argv[0][1] == '-' && !argv[0][2]) {
4617 if ((s = strchr(argv[0], '='))) {
4618 const char *const start_name = argv[0] + 1;
4619 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4620 TRUE, SVt_PV)), s + 1);
4623 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4626 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4627 GvMULTI_on(PL_argvgv);
4628 (void)gv_AVadd(PL_argvgv);
4629 av_clear(GvAVn(PL_argvgv));
4630 for (; argc > 0; argc--,argv++) {
4631 SV * const sv = newSVpv(argv[0],0);
4632 av_push(GvAVn(PL_argvgv),sv);
4633 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4634 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4637 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4638 (void)sv_utf8_decode(sv);
4644 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4649 PL_toptarget = newSV(0);
4650 sv_upgrade(PL_toptarget, SVt_PVFM);
4651 sv_setpvn(PL_toptarget, "", 0);
4652 PL_bodytarget = newSV(0);
4653 sv_upgrade(PL_bodytarget, SVt_PVFM);
4654 sv_setpvn(PL_bodytarget, "", 0);
4655 PL_formtarget = PL_bodytarget;
4659 init_argv_symbols(argc,argv);
4661 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4662 #ifdef MACOS_TRADITIONAL
4663 /* $0 is not majick on a Mac */
4664 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4666 sv_setpv(GvSV(tmpgv),PL_origfilename);
4667 magicname("0", "0", 1);
4670 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4672 bool env_is_not_environ;
4673 GvMULTI_on(PL_envgv);
4674 hv = GvHVn(PL_envgv);
4675 hv_magic(hv, NULL, PERL_MAGIC_env);
4677 #ifdef USE_ENVIRON_ARRAY
4678 /* Note that if the supplied env parameter is actually a copy
4679 of the global environ then it may now point to free'd memory
4680 if the environment has been modified since. To avoid this
4681 problem we treat env==NULL as meaning 'use the default'
4685 env_is_not_environ = env != environ;
4686 if (env_is_not_environ
4687 # ifdef USE_ITHREADS
4688 && PL_curinterp == aTHX
4695 char** origenv = environ;
4698 for (; *env; env++) {
4699 if (!(s = strchr(*env,'=')) || s == *env)
4701 #if defined(MSDOS) && !defined(DJGPP)
4706 sv = newSVpv(s+1, 0);
4707 (void)hv_store(hv, *env, s - *env, sv, 0);
4708 if (env_is_not_environ)
4710 if (origenv != environ) {
4711 /* realloc has shifted us */
4712 env = (env - origenv) + environ;
4717 #endif /* USE_ENVIRON_ARRAY */
4718 #endif /* !PERL_MICRO */
4721 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4722 SvREADONLY_off(GvSV(tmpgv));
4723 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4724 SvREADONLY_on(GvSV(tmpgv));
4726 #ifdef THREADS_HAVE_PIDS
4727 PL_ppid = (IV)getppid();
4730 /* touch @F array to prevent spurious warnings 20020415 MJD */
4732 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4734 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4735 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4736 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4740 S_init_perllib(pTHX)
4746 s = PerlEnv_getenv("PERL5LIB");
4748 * It isn't possible to delete an environment variable with
4749 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4750 * case we treat PERL5LIB as undefined if it has a zero-length value.
4752 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4753 if (s && *s != '\0')
4757 incpush(s, TRUE, TRUE, TRUE, FALSE);
4759 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4761 /* Treat PERL5?LIB as a possible search list logical name -- the
4762 * "natural" VMS idiom for a Unix path string. We allow each
4763 * element to be a set of |-separated directories for compatibility.
4767 if (my_trnlnm("PERL5LIB",buf,0))
4768 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4770 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4774 /* Use the ~-expanded versions of APPLLIB (undocumented),
4775 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4778 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4782 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4784 #ifdef MACOS_TRADITIONAL
4787 SV * privdir = newSV(0);
4788 char * macperl = PerlEnv_getenv("MACPERL");
4793 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4794 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4795 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4796 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4797 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4798 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4800 SvREFCNT_dec(privdir);
4803 incpush(":", FALSE, FALSE, TRUE, FALSE);
4806 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4809 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4811 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4815 /* sitearch is always relative to sitelib on Windows for
4816 * DLL-based path intuition to work correctly */
4817 # if !defined(WIN32)
4818 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4824 /* this picks up sitearch as well */
4825 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4827 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4831 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4832 /* Search for version-specific dirs below here */
4833 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4836 #ifdef PERL_VENDORARCH_EXP
4837 /* vendorarch is always relative to vendorlib on Windows for
4838 * DLL-based path intuition to work correctly */
4839 # if !defined(WIN32)
4840 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4844 #ifdef PERL_VENDORLIB_EXP
4846 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4848 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4852 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4853 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4856 #ifdef PERL_OTHERLIBDIRS
4857 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4861 incpush(".", FALSE, FALSE, TRUE, FALSE);
4862 #endif /* MACOS_TRADITIONAL */
4865 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4866 # define PERLLIB_SEP ';'
4869 # define PERLLIB_SEP '|'
4871 # if defined(MACOS_TRADITIONAL)
4872 # define PERLLIB_SEP ','
4874 # define PERLLIB_SEP ':'
4878 #ifndef PERLLIB_MANGLE
4879 # define PERLLIB_MANGLE(s,n) (s)
4882 /* Push a directory onto @INC if it exists.
4883 Generate a new SV if we do this, to save needing to copy the SV we push
4886 S_incpush_if_exists(pTHX_ SV *dir)
4890 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4891 S_ISDIR(tmpstatbuf.st_mode)) {
4892 av_push(GvAVn(PL_incgv), dir);
4899 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4904 const char *p = dir;
4909 if (addsubdirs || addoldvers) {
4913 /* Break at all separators */
4915 SV *libdir = newSV(0);
4918 /* skip any consecutive separators */
4920 while ( *p == PERLLIB_SEP ) {
4921 /* Uncomment the next line for PATH semantics */
4922 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4927 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4928 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4933 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4934 p = NULL; /* break out */
4936 #ifdef MACOS_TRADITIONAL
4937 if (!strchr(SvPVX(libdir), ':')) {
4940 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4942 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4943 sv_catpvs(libdir, ":");
4946 /* Do the if() outside the #ifdef to avoid warnings about an unused
4949 #ifdef PERL_RELOCATABLE_INC
4951 * Relocatable include entries are marked with a leading .../
4954 * 0: Remove that leading ".../"
4955 * 1: Remove trailing executable name (anything after the last '/')
4956 * from the perl path to give a perl prefix
4958 * While the @INC element starts "../" and the prefix ends with a real
4959 * directory (ie not . or ..) chop that real directory off the prefix
4960 * and the leading "../" from the @INC element. ie a logical "../"
4962 * Finally concatenate the prefix and the remainder of the @INC element
4963 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4964 * generates /usr/local/lib/perl5
4966 const char *libpath = SvPVX(libdir);
4967 STRLEN libpath_len = SvCUR(libdir);
4968 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4970 SV * const caret_X = get_sv("\030", 0);
4971 /* Going to use the SV just as a scratch buffer holding a C
4977 /* $^X is *the* source of taint if tainting is on, hence
4978 SvPOK() won't be true. */
4980 assert(SvPOKp(caret_X));
4981 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4982 /* Firstly take off the leading .../
4983 If all else fail we'll do the paths relative to the current
4985 sv_chop(libdir, libpath + 4);
4986 /* Don't use SvPV as we're intentionally bypassing taining,
4987 mortal copies that the mg_get of tainting creates, and
4988 corruption that seems to come via the save stack.
4989 I guess that the save stack isn't correctly set up yet. */
4990 libpath = SvPVX(libdir);
4991 libpath_len = SvCUR(libdir);
4993 /* This would work more efficiently with memrchr, but as it's
4994 only a GNU extension we'd need to probe for it and
4995 implement our own. Not hard, but maybe not worth it? */
4997 prefix = SvPVX(prefix_sv);
4998 lastslash = strrchr(prefix, '/');
5000 /* First time in with the *lastslash = '\0' we just wipe off
5001 the trailing /perl from (say) /usr/foo/bin/perl
5005 while ((*lastslash = '\0'), /* Do that, come what may. */
5006 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5007 && (lastslash = strrchr(prefix, '/')))) {
5008 if (lastslash[1] == '\0'
5009 || (lastslash[1] == '.'
5010 && (lastslash[2] == '/' /* ends "/." */
5011 || (lastslash[2] == '/'
5012 && lastslash[3] == '/' /* or "/.." */
5014 /* Prefix ends "/" or "/." or "/..", any of which
5015 are fishy, so don't do any more logical cleanup.
5019 /* Remove leading "../" from path */
5022 /* Next iteration round the loop removes the last
5023 directory name from prefix by writing a '\0' in
5024 the while clause. */
5026 /* prefix has been terminated with a '\0' to the correct
5027 length. libpath points somewhere into the libdir SV.
5028 We need to join the 2 with '/' and drop the result into
5030 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5031 SvREFCNT_dec(libdir);
5032 /* And this is the new libdir. */
5035 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5036 /* Need to taint reloccated paths if running set ID */
5037 SvTAINTED_on(libdir);
5040 SvREFCNT_dec(prefix_sv);
5045 * BEFORE pushing libdir onto @INC we may first push version- and
5046 * archname-specific sub-directories.
5048 if (addsubdirs || addoldvers) {
5049 #ifdef PERL_INC_VERSION_LIST
5050 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5051 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5052 const char * const *incver;
5058 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5060 while (unix[len-1] == '/') len--; /* Cosmetic */
5061 sv_usepvn(libdir,unix,len);
5064 PerlIO_printf(Perl_error_log,
5065 "Failed to unixify @INC element \"%s\"\n",
5069 #ifdef MACOS_TRADITIONAL
5070 #define PERL_AV_SUFFIX_FMT ""
5071 #define PERL_ARCH_FMT "%s:"
5072 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5074 #define PERL_AV_SUFFIX_FMT "/"
5075 #define PERL_ARCH_FMT "/%s"
5076 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5078 /* .../version/archname if -d .../version/archname */
5079 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5081 (int)PERL_REVISION, (int)PERL_VERSION,
5082 (int)PERL_SUBVERSION, ARCHNAME);
5083 subdir = S_incpush_if_exists(aTHX_ subdir);
5085 /* .../version if -d .../version */
5086 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5088 (int)PERL_REVISION, (int)PERL_VERSION,
5089 (int)PERL_SUBVERSION);
5090 subdir = S_incpush_if_exists(aTHX_ subdir);
5092 /* .../archname if -d .../archname */
5093 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5094 SVfARG(libdir), ARCHNAME);
5095 subdir = S_incpush_if_exists(aTHX_ subdir);
5099 #ifdef PERL_INC_VERSION_LIST
5101 for (incver = incverlist; *incver; incver++) {
5102 /* .../xxx if -d .../xxx */
5103 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5104 SVfARG(libdir), *incver);
5105 subdir = S_incpush_if_exists(aTHX_ subdir);
5111 /* finally push this lib directory on the end of @INC */
5112 av_push(GvAVn(PL_incgv), libdir);
5115 assert (SvREFCNT(subdir) == 1);
5116 SvREFCNT_dec(subdir);
5122 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5126 const line_t oldline = CopLINE(PL_curcop);
5132 while (av_len(paramList) >= 0) {
5133 cv = (CV*)av_shift(paramList);
5135 if (paramList == PL_beginav) {
5136 /* save PL_beginav for compiler */
5137 if (! PL_beginav_save)
5138 PL_beginav_save = newAV();
5139 av_push(PL_beginav_save, (SV*)cv);
5141 else if (paramList == PL_checkav) {
5142 /* save PL_checkav for compiler */
5143 if (! PL_checkav_save)
5144 PL_checkav_save = newAV();
5145 av_push(PL_checkav_save, (SV*)cv);
5147 else if (paramList == PL_unitcheckav) {
5148 /* save PL_unitcheckav for compiler */
5149 if (! PL_unitcheckav_save)
5150 PL_unitcheckav_save = newAV();
5151 av_push(PL_unitcheckav_save, (SV*)cv);
5162 PL_madskills |= 16384;
5167 PL_madskills &= ~16384;
5170 (void)SvPV_const(atsv, len);
5171 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5172 break; /* not really trying to run, so just wing it */
5174 PL_curcop = &PL_compiling;
5175 CopLINE_set(PL_curcop, oldline);
5176 if (paramList == PL_beginav)
5177 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5179 Perl_sv_catpvf(aTHX_ atsv,
5180 "%s failed--call queue aborted",
5181 paramList == PL_checkav ? "CHECK"
5182 : paramList == PL_initav ? "INIT"
5183 : paramList == PL_unitcheckav ? "UNITCHECK"
5185 while (PL_scopestack_ix > oldscope)
5188 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5195 /* my_exit() was called */
5196 while (PL_scopestack_ix > oldscope)
5199 PL_curstash = PL_defstash;
5200 PL_curcop = &PL_compiling;
5201 CopLINE_set(PL_curcop, oldline);
5203 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5204 return; /* not really trying to run, so just wing it */
5205 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5206 if (paramList == PL_beginav)
5207 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5209 Perl_croak(aTHX_ "%s failed--call queue aborted",
5210 paramList == PL_checkav ? "CHECK"
5211 : paramList == PL_initav ? "INIT"
5212 : paramList == PL_unitcheckav ? "UNITCHECK"
5219 PL_curcop = &PL_compiling;
5220 CopLINE_set(PL_curcop, oldline);
5223 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5232 Perl_my_exit(pTHX_ U32 status)
5235 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5236 (void*)thr, (unsigned long) status));
5245 STATUS_EXIT_SET(status);
5252 Perl_my_failure_exit(pTHX)
5256 /* We have been called to fall on our sword. The desired exit code
5257 * should be already set in STATUS_UNIX, but could be shifted over
5258 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5261 * If an error code has not been set, then force the issue.
5263 if (MY_POSIX_EXIT) {
5265 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5266 * the exit code when there isn't an error.
5269 if (STATUS_UNIX == 0)
5270 STATUS_UNIX_EXIT_SET(255);
5272 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5274 /* The exit code could have been set by $? or vmsish which
5275 * means that it may not be fatal. So convert
5276 * success/warning codes to fatal.
5278 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5279 STATUS_UNIX_EXIT_SET(255);
5283 /* Traditionally Perl on VMS always expects a Fatal Error. */
5284 if (vaxc$errno & 1) {
5286 /* So force success status to failure */
5287 if (STATUS_NATIVE & 1)
5292 STATUS_UNIX = EINTR; /* In case something cares */
5297 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5299 /* Encode the severity code */
5300 severity = STATUS_NATIVE & STS$M_SEVERITY;
5301 STATUS_UNIX = (severity ? severity : 1) << 8;
5303 /* Perl expects this to be a fatal error */
5304 if (severity != STS$K_SEVERE)
5313 STATUS_UNIX_SET(errno);
5315 exitstatus = STATUS_UNIX >> 8;
5316 if (exitstatus & 255)
5317 STATUS_UNIX_SET(exitstatus);
5319 STATUS_UNIX_SET(255);
5326 S_my_exit_jump(pTHX)
5331 SvREFCNT_dec(PL_e_script);
5335 POPSTACK_TO(PL_mainstack);
5343 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5346 const char * const p = SvPVX_const(PL_e_script);
5347 const char *nl = strchr(p, '\n');
5349 PERL_UNUSED_ARG(idx);
5350 PERL_UNUSED_ARG(maxlen);
5352 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5354 filter_del(read_e_script);
5357 sv_catpvn(buf_sv, p, nl-p);
5358 sv_chop(PL_e_script, nl);
5364 * c-indentation-style: bsd
5366 * indent-tabs-mode: t
5369 * ex: set ts=8 sts=4 sw=4 noet: