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 /* First entry is an array of empty elements */
325 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
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);
1799 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1803 opts_prog = newSVpvs("print Config::myconfig(),");
1805 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1807 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1809 opts = SvCUR(opts_prog);
1811 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1815 # ifdef DEBUG_LEAKING_SCALARS
1816 " DEBUG_LEAKING_SCALARS"
1818 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1819 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1821 # ifdef FAKE_THREADS
1824 # ifdef MULTIPLICITY
1833 # ifdef PERL_DONT_CREATE_GVSV
1834 " PERL_DONT_CREATE_GVSV"
1836 # ifdef PERL_GLOBAL_STRUCT
1837 " PERL_GLOBAL_STRUCT"
1839 # ifdef PERL_IMPLICIT_CONTEXT
1840 " PERL_IMPLICIT_CONTEXT"
1842 # ifdef PERL_IMPLICIT_SYS
1843 " PERL_IMPLICIT_SYS"
1848 # ifdef PERL_MALLOC_WRAP
1851 # ifdef PERL_NEED_APPCTX
1854 # ifdef PERL_NEED_TIMESBASE
1855 " PERL_NEED_TIMESBASE"
1857 # ifdef PERL_OLD_COPY_ON_WRITE
1858 " PERL_OLD_COPY_ON_WRITE"
1860 # ifdef PERL_TRACK_MEMPOOL
1861 " PERL_TRACK_MEMPOOL"
1863 # ifdef PERL_USE_SAFE_PUTENV
1864 " PERL_USE_SAFE_PUTENV"
1866 #ifdef PERL_USES_PL_PIDSTATUS
1867 " PERL_USES_PL_PIDSTATUS"
1869 # ifdef PL_OP_SLAB_ALLOC
1872 # ifdef THREADS_HAVE_PIDS
1873 " THREADS_HAVE_PIDS"
1875 # ifdef USE_64_BIT_ALL
1878 # ifdef USE_64_BIT_INT
1881 # ifdef USE_ITHREADS
1884 # ifdef USE_LARGE_FILES
1887 # ifdef USE_LONG_DOUBLE
1893 # ifdef USE_REENTRANT_API
1894 " USE_REENTRANT_API"
1899 # ifdef USE_SITECUSTOMIZE
1900 " USE_SITECUSTOMIZE"
1907 while (SvCUR(opts_prog) > opts+76) {
1908 /* find last space after "options: " and before col 76
1912 char * const pv = SvPV_nolen(opts_prog);
1913 const char c = pv[opts+76];
1915 space = strrchr(pv+opts+26, ' ');
1917 if (!space) break; /* "Can't happen" */
1919 /* break the line before that space */
1922 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1923 STR_WITH_LEN("\\n "));
1926 sv_catpvs(opts_prog,"\\n\",");
1928 #if defined(LOCAL_PATCH_COUNT)
1929 if (LOCAL_PATCH_COUNT > 0) {
1931 sv_catpvs(opts_prog,
1932 "\" Locally applied patches:\\n\",");
1933 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1934 if (PL_localpatches[i])
1935 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1936 0, PL_localpatches[i], 0);
1940 Perl_sv_catpvf(aTHX_ opts_prog,
1941 "\" Built under %s\\n\"",OSNAME);
1944 Perl_sv_catpvf(aTHX_ opts_prog,
1945 ",\" Compiled at %s %s\\n\"",__DATE__,
1948 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1952 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1953 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1954 "sort grep {/^PERL/} keys %ENV; ");
1956 sv_catpvs(opts_prog,
1957 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1959 sv_catpvs(opts_prog,
1960 "print \" \\%ENV:\\n @env\\n\" if @env;"
1961 "print \" \\@INC:\\n @INC\\n\";");
1965 opts_prog = Perl_newSVpvf(aTHX_
1966 "Config::config_vars(qw%c%s%c)",
1970 av_push(PL_preambleav, opts_prog);
1971 /* don't look for script or read stdin */
1972 scriptname = BIT_BUCKET;
1976 PL_doextract = TRUE;
1984 if (!*++s || isSPACE(*s)) {
1988 /* catch use of gnu style long options */
1989 if (strEQ(s, "version")) {
1993 if (strEQ(s, "help")) {
2000 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2006 #ifndef SECURE_INTERNAL_GETENV
2009 (s = PerlEnv_getenv("PERL5OPT")))
2011 const char *popt = s;
2014 if (*s == '-' && *(s+1) == 'T') {
2015 CHECK_MALLOC_TOO_LATE_FOR('T');
2017 PL_taint_warn = FALSE;
2020 char *popt_copy = NULL;
2033 if (!strchr("CDIMUdmtwA", *s))
2034 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2038 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2039 s = popt_copy + (s - popt);
2040 d = popt_copy + (d - popt);
2047 if( !PL_tainting ) {
2048 PL_taint_warn = TRUE;
2058 #ifdef USE_SITECUSTOMIZE
2060 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2061 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2066 scriptname = argv[0];
2069 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2071 else if (scriptname == NULL) {
2073 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2079 /* Set $^X early so that it can be used for relocatable paths in @INC */
2080 assert (!PL_tainted);
2082 S_set_caret_X(aTHX);
2089 = open_script(scriptname, dosearch, sv, &suidscript);
2091 validate_suid(validarg, scriptname, fdscript, suidscript);
2094 # if defined(SIGCHLD) || defined(SIGCLD)
2097 # define SIGCHLD SIGCLD
2099 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2100 if (sigstate == (Sighandler_t) SIG_IGN) {
2101 if (ckWARN(WARN_SIGNAL))
2102 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2103 "Can't ignore signal CHLD, forcing to default");
2104 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2111 #ifdef MACOS_TRADITIONAL
2112 || gMacPerl_AlwaysExtract
2116 /* This will croak if suidscript is >= 0, as -x cannot be used with
2118 forbid_setid('x', suidscript);
2119 /* Hence you can't get here if suidscript >= 0 */
2122 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2123 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2127 PL_main_cv = PL_compcv = (CV*)newSV(0);
2128 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2129 CvUNIQUE_on(PL_compcv);
2131 CvPADLIST(PL_compcv) = pad_new(0);
2134 boot_core_UNIVERSAL();
2135 boot_core_xsutils();
2138 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2140 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2146 # ifdef HAS_SOCKS5_INIT
2147 socks5_init(argv[0]);
2153 init_predump_symbols();
2154 /* init_postdump_symbols not currently designed to be called */
2155 /* more than once (ENV isn't cleared first, for example) */
2156 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2158 init_postdump_symbols(argc,argv,env);
2160 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2161 * or explicitly in some platforms.
2162 * locale.c:Perl_init_i18nl10n() if the environment
2163 * look like the user wants to use UTF-8. */
2164 #if defined(__SYMBIAN32__)
2165 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2168 /* Requires init_predump_symbols(). */
2169 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2174 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2175 * and the default open disciplines. */
2176 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2177 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2179 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2180 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2181 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2183 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2184 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2185 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2187 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2188 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2189 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2191 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2192 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2195 sv_setpvn(sv, ":utf8\0:utf8", 11);
2197 sv_setpvn(sv, ":utf8\0", 6);
2200 sv_setpvn(sv, "\0:utf8", 6);
2206 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2207 if (strEQ(s, "unsafe"))
2208 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2209 else if (strEQ(s, "safe"))
2210 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2212 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2216 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2220 PL_xmlfp = PerlIO_stdout();
2222 PL_xmlfp = PerlIO_open(s, "w");
2224 Perl_croak(aTHX_ "Can't open %s", s);
2226 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2228 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2229 PL_madskills = atoi(s);
2230 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2236 /* now parse the script */
2238 SETERRNO(0,SS_NORMAL);
2240 #ifdef MACOS_TRADITIONAL
2241 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2243 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2245 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2246 MacPerl_MPWFileName(PL_origfilename));
2250 if (yyparse() || PL_error_count) {
2252 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2254 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2259 CopLINE_set(PL_curcop, 0);
2260 PL_curstash = PL_defstash;
2261 PL_preprocess = FALSE;
2263 SvREFCNT_dec(PL_e_script);
2271 SAVECOPFILE(PL_curcop);
2272 SAVECOPLINE(PL_curcop);
2273 gv_check(PL_defstash);
2280 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2281 dump_mstats("after compilation:");
2290 =for apidoc perl_run
2292 Tells a Perl interpreter to run. See L<perlembed>.
2305 PERL_UNUSED_ARG(my_perl);
2307 oldscope = PL_scopestack_ix;
2315 cxstack_ix = -1; /* start context stack again */
2317 case 0: /* normal completion */
2321 case 2: /* my_exit() */
2322 while (PL_scopestack_ix > oldscope)
2325 PL_curstash = PL_defstash;
2326 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2327 PL_endav && !PL_minus_c)
2328 call_list(oldscope, PL_endav);
2330 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2331 dump_mstats("after execution: ");
2337 POPSTACK_TO(PL_mainstack);
2340 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2352 S_run_body(pTHX_ I32 oldscope)
2355 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2356 PL_sawampersand ? "Enabling" : "Omitting"));
2358 if (!PL_restartop) {
2362 exit(0); /* less likely to core dump than my_exit(0) */
2365 DEBUG_x(dump_all());
2368 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2370 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2374 #ifdef MACOS_TRADITIONAL
2375 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2376 (gMacPerl_ErrorFormat ? "# " : ""),
2377 MacPerl_MPWFileName(PL_origfilename));
2379 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2383 if (PERLDB_SINGLE && PL_DBsingle)
2384 sv_setiv(PL_DBsingle, 1);
2386 call_list(oldscope, PL_initav);
2392 PL_op = PL_restartop;
2396 else if (PL_main_start) {
2397 CvDEPTH(PL_main_cv) = 1;
2398 PL_op = PL_main_start;
2406 =head1 SV Manipulation Functions
2408 =for apidoc p||get_sv
2410 Returns the SV of the specified Perl scalar. If C<create> is set and the
2411 Perl variable does not exist then it will be created. If C<create> is not
2412 set and the variable does not exist then NULL is returned.
2418 Perl_get_sv(pTHX_ const char *name, I32 create)
2421 gv = gv_fetchpv(name, create, SVt_PV);
2428 =head1 Array Manipulation Functions
2430 =for apidoc p||get_av
2432 Returns the AV of the specified Perl array. If C<create> is set and the
2433 Perl variable does not exist then it will be created. If C<create> is not
2434 set and the variable does not exist then NULL is returned.
2440 Perl_get_av(pTHX_ const char *name, I32 create)
2442 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2451 =head1 Hash Manipulation Functions
2453 =for apidoc p||get_hv
2455 Returns the HV of the specified Perl hash. If C<create> is set and the
2456 Perl variable does not exist then it will be created. If C<create> is not
2457 set and the variable does not exist then NULL is returned.
2463 Perl_get_hv(pTHX_ const char *name, I32 create)
2465 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2474 =head1 CV Manipulation Functions
2476 =for apidoc p||get_cvn_flags
2478 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2479 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2480 exist then it will be declared (which has the same effect as saying
2481 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2482 then NULL is returned.
2484 =for apidoc p||get_cv
2486 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2492 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2494 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2495 /* XXX unsafe for threads if eval_owner isn't held */
2496 /* XXX this is probably not what they think they're getting.
2497 * It has the same effect as "sub name;", i.e. just a forward
2499 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2500 SV *const sv = newSVpvn(name,len);
2501 SvFLAGS(sv) |= flags & SVf_UTF8;
2502 return newSUB(start_subparse(FALSE, 0),
2503 newSVOP(OP_CONST, 0, sv),
2512 Perl_get_cv(pTHX_ const char *name, I32 flags)
2514 return get_cvn_flags(name, strlen(name), flags);
2517 /* Be sure to refetch the stack pointer after calling these routines. */
2521 =head1 Callback Functions
2523 =for apidoc p||call_argv
2525 Performs a callback to the specified Perl sub. See L<perlcall>.
2531 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2533 /* See G_* flags in cop.h */
2534 /* null terminated arg list */
2542 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2547 return call_pv(sub_name, flags);
2551 =for apidoc p||call_pv
2553 Performs a callback to the specified Perl sub. See L<perlcall>.
2559 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2560 /* name of the subroutine */
2561 /* See G_* flags in cop.h */
2563 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2567 =for apidoc p||call_method
2569 Performs a callback to the specified Perl method. The blessed object must
2570 be on the stack. See L<perlcall>.
2576 Perl_call_method(pTHX_ const char *methname, I32 flags)
2577 /* name of the subroutine */
2578 /* See G_* flags in cop.h */
2580 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2583 /* May be called with any of a CV, a GV, or an SV containing the name. */
2585 =for apidoc p||call_sv
2587 Performs a callback to the Perl sub whose name is in the SV. See
2594 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2595 /* See G_* flags in cop.h */
2598 LOGOP myop; /* fake syntax tree node */
2603 bool oldcatch = CATCH_GET;
2605 OP* const oldop = PL_op;
2608 if (flags & G_DISCARD) {
2613 Zero(&myop, 1, LOGOP);
2614 myop.op_next = NULL;
2615 if (!(flags & G_NOARGS))
2616 myop.op_flags |= OPf_STACKED;
2617 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2618 (flags & G_ARRAY) ? OPf_WANT_LIST :
2623 EXTEND(PL_stack_sp, 1);
2624 *++PL_stack_sp = sv;
2626 oldscope = PL_scopestack_ix;
2628 if (PERLDB_SUB && PL_curstash != PL_debstash
2629 /* Handle first BEGIN of -d. */
2630 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2631 /* Try harder, since this may have been a sighandler, thus
2632 * curstash may be meaningless. */
2633 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2634 && !(flags & G_NODEBUG))
2635 PL_op->op_private |= OPpENTERSUB_DB;
2637 if (flags & G_METHOD) {
2638 Zero(&method_op, 1, UNOP);
2639 method_op.op_next = PL_op;
2640 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2641 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2642 PL_op = (OP*)&method_op;
2645 if (!(flags & G_EVAL)) {
2647 CALL_BODY_SUB((OP*)&myop);
2648 retval = PL_stack_sp - (PL_stack_base + oldmark);
2649 CATCH_SET(oldcatch);
2652 myop.op_other = (OP*)&myop;
2654 create_eval_scope(flags|G_FAKINGEVAL);
2662 CALL_BODY_SUB((OP*)&myop);
2663 retval = PL_stack_sp - (PL_stack_base + oldmark);
2664 if (!(flags & G_KEEPERR))
2665 sv_setpvn(ERRSV,"",0);
2671 /* my_exit() was called */
2672 PL_curstash = PL_defstash;
2675 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2676 Perl_croak(aTHX_ "Callback called exit");
2681 PL_op = PL_restartop;
2685 PL_stack_sp = PL_stack_base + oldmark;
2686 if (flags & G_ARRAY)
2690 *++PL_stack_sp = &PL_sv_undef;
2695 if (PL_scopestack_ix > oldscope)
2696 delete_eval_scope();
2700 if (flags & G_DISCARD) {
2701 PL_stack_sp = PL_stack_base + oldmark;
2710 /* Eval a string. The G_EVAL flag is always assumed. */
2713 =for apidoc p||eval_sv
2715 Tells Perl to C<eval> the string in the SV.
2721 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2723 /* See G_* flags in cop.h */
2727 UNOP myop; /* fake syntax tree node */
2728 VOL I32 oldmark = SP - PL_stack_base;
2731 OP* const oldop = PL_op;
2734 if (flags & G_DISCARD) {
2741 Zero(PL_op, 1, UNOP);
2742 EXTEND(PL_stack_sp, 1);
2743 *++PL_stack_sp = sv;
2745 if (!(flags & G_NOARGS))
2746 myop.op_flags = OPf_STACKED;
2747 myop.op_next = NULL;
2748 myop.op_type = OP_ENTEREVAL;
2749 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2750 (flags & G_ARRAY) ? OPf_WANT_LIST :
2752 if (flags & G_KEEPERR)
2753 myop.op_flags |= OPf_SPECIAL;
2755 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2756 * before a PUSHEVAL, which corrupts the stack after a croak */
2757 TAINT_PROPER("eval_sv()");
2763 CALL_BODY_EVAL((OP*)&myop);
2764 retval = PL_stack_sp - (PL_stack_base + oldmark);
2765 if (!(flags & G_KEEPERR))
2766 sv_setpvn(ERRSV,"",0);
2772 /* my_exit() was called */
2773 PL_curstash = PL_defstash;
2776 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2777 Perl_croak(aTHX_ "Callback called exit");
2782 PL_op = PL_restartop;
2786 PL_stack_sp = PL_stack_base + oldmark;
2787 if (flags & G_ARRAY)
2791 *++PL_stack_sp = &PL_sv_undef;
2797 if (flags & G_DISCARD) {
2798 PL_stack_sp = PL_stack_base + oldmark;
2808 =for apidoc p||eval_pv
2810 Tells Perl to C<eval> the given string and return an SV* result.
2816 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2820 SV* sv = newSVpv(p, 0);
2822 eval_sv(sv, G_SCALAR);
2829 if (croak_on_error && SvTRUE(ERRSV)) {
2830 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2836 /* Require a module. */
2839 =head1 Embedding Functions
2841 =for apidoc p||require_pv
2843 Tells Perl to C<require> the file named by the string argument. It is
2844 analogous to the Perl code C<eval "require '$file'">. It's even
2845 implemented that way; consider using load_module instead.
2850 Perl_require_pv(pTHX_ const char *pv)
2855 PUSHSTACKi(PERLSI_REQUIRE);
2857 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2858 eval_sv(sv_2mortal(sv), G_DISCARD);
2864 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2866 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2869 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2873 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2875 /* This message really ought to be max 23 lines.
2876 * Removed -h because the user already knows that option. Others? */
2878 static const char * const usage_msg[] = {
2879 "-0[octal] specify record separator (\\0, if no argument)",
2880 "-A[mod][=pattern] activate all/given assertions",
2881 "-a autosplit mode with -n or -p (splits $_ into @F)",
2882 "-C[number/list] enables the listed Unicode features",
2883 "-c check syntax only (runs BEGIN and CHECK blocks)",
2884 "-d[:debugger] run program under debugger",
2885 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2886 "-e program one line of program (several -e's allowed, omit programfile)",
2887 "-E program like -e, but enables all optional features",
2888 "-f don't do $sitelib/sitecustomize.pl at startup",
2889 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2890 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2891 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2892 "-l[octal] enable line ending processing, specifies line terminator",
2893 "-[mM][-]module execute \"use/no module...\" before executing program",
2894 "-n assume \"while (<>) { ... }\" loop around program",
2895 "-p assume loop like -n but print line also, like sed",
2896 "-P run program through C preprocessor before compilation",
2897 "-s enable rudimentary parsing for switches after programfile",
2898 "-S look for programfile using PATH environment variable",
2899 "-t enable tainting warnings",
2900 "-T enable tainting checks",
2901 "-u dump core after parsing program",
2902 "-U allow unsafe operations",
2903 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2904 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2905 "-w enable many useful warnings (RECOMMENDED)",
2906 "-W enable all warnings",
2907 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2908 "-X disable all warnings",
2912 const char * const *p = usage_msg;
2914 PerlIO_printf(PerlIO_stdout(),
2915 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2918 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2921 /* convert a string of -D options (or digits) into an int.
2922 * sets *s to point to the char after the options */
2926 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2928 static const char * const usage_msgd[] = {
2929 " Debugging flag values: (see also -d)",
2930 " p Tokenizing and parsing (with v, displays parse stack)",
2931 " s Stack snapshots (with v, displays all stacks)",
2932 " l Context (loop) stack processing",
2933 " t Trace execution",
2934 " o Method and overloading resolution",
2935 " c String/numeric conversions",
2936 " P Print profiling info, preprocessor command for -P, source file input state",
2937 " m Memory allocation",
2938 " f Format processing",
2939 " r Regular expression parsing and execution",
2940 " x Syntax tree dump",
2941 " u Tainting checks",
2942 " H Hash dump -- usurps values()",
2943 " X Scratchpad allocation",
2945 " S Thread synchronization",
2947 " R Include reference counts of dumped variables (eg when using -Ds)",
2948 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2949 " v Verbose: use in conjunction with other flags",
2951 " A Consistency checks on internal structures",
2952 " q quiet - currently only suppresses the 'EXECUTING' message",
2957 /* if adding extra options, remember to update DEBUG_MASK */
2958 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2960 for (; isALNUM(**s); (*s)++) {
2961 const char * const d = strchr(debopts,**s);
2963 i |= 1 << (d - debopts);
2964 else if (ckWARN_d(WARN_DEBUGGING))
2965 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2966 "invalid option -D%c, use -D'' to see choices\n", **s);
2969 else if (isDIGIT(**s)) {
2971 for (; isALNUM(**s); (*s)++) ;
2973 else if (givehelp) {
2974 const char *const *p = usage_msgd;
2975 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2978 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2979 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2980 "-Dp not implemented on this platform\n");
2986 /* This routine handles any switches that can be given during run */
2989 Perl_moreswitches(pTHX_ char *s)
3000 SvREFCNT_dec(PL_rs);
3001 if (s[1] == 'x' && s[2]) {
3002 const char *e = s+=2;
3008 flags = PERL_SCAN_SILENT_ILLDIGIT;
3009 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3010 if (s + numlen < e) {
3011 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3015 PL_rs = newSVpvs("");
3016 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3017 tmps = (U8*)SvPVX(PL_rs);
3018 uvchr_to_utf8(tmps, rschar);
3019 SvCUR_set(PL_rs, UNISKIP(rschar));
3024 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3025 if (rschar & ~((U8)~0))
3026 PL_rs = &PL_sv_undef;
3027 else if (!rschar && numlen >= 2)
3028 PL_rs = newSVpvs("");
3030 char ch = (char)rschar;
3031 PL_rs = newSVpvn(&ch, 1);
3034 sv_setsv(get_sv("/", TRUE), PL_rs);
3039 PL_unicode = parse_unicode_opts( (const char **)&s );
3040 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3046 while (*s && !isSPACE(*s)) ++s;
3047 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3058 forbid_setid('d', -1);
3061 /* -dt indicates to the debugger that threads will be used */
3062 if (*s == 't' && !isALNUM(s[1])) {
3064 my_setenv("PERL5DB_THREADED", "1");
3067 /* The following permits -d:Mod to accepts arguments following an =
3068 in the fashion that -MSome::Mod does. */
3069 if (*s == ':' || *s == '=') {
3071 SV * const sv = newSVpvs("use Devel::");
3073 /* We now allow -d:Module=Foo,Bar */
3074 while(isALNUM(*s) || *s==':') ++s;
3076 sv_catpv(sv, start);
3078 sv_catpvn(sv, start, s-start);
3079 /* Don't use NUL as q// delimiter here, this string goes in the
3081 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3084 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3087 PL_perldb = PERLDB_ALL;
3094 forbid_setid('D', -1);
3096 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3097 #else /* !DEBUGGING */
3098 if (ckWARN_d(WARN_DEBUGGING))
3099 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3100 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3101 for (s++; isALNUM(*s); s++) ;
3106 usage(PL_origargv[0]);
3109 Safefree(PL_inplace);
3110 #if defined(__CYGWIN__) /* do backup extension automagically */
3111 if (*(s+1) == '\0') {
3112 PL_inplace = savepvs(".bak");
3115 #endif /* __CYGWIN__ */
3117 const char * const start = ++s;
3118 while (*s && !isSPACE(*s))
3121 PL_inplace = savepvn(start, s - start);
3125 if (*s == '-') /* Additional switches on #! line. */
3129 case 'I': /* -I handled both here and in parse_body() */
3130 forbid_setid('I', -1);
3132 while (*s && isSPACE(*s))
3137 /* ignore trailing spaces (possibly followed by other switches) */
3139 for (e = p; *e && !isSPACE(*e); e++) ;
3143 } while (*p && *p != '-');
3144 e = savepvn(s, e-s);
3145 incpush(e, TRUE, TRUE, FALSE, FALSE);
3152 Perl_croak(aTHX_ "No directory specified for -I");
3158 SvREFCNT_dec(PL_ors_sv);
3164 PL_ors_sv = newSVpvs("\n");
3165 numlen = 3 + (*s == '0');
3166 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3170 if (RsPARA(PL_rs)) {
3171 PL_ors_sv = newSVpvs("\n\n");
3174 PL_ors_sv = newSVsv(PL_rs);
3179 forbid_setid('A', -1);
3182 char * const start = s;
3183 SV * const sv = newSVpvs("use assertions::activate");
3184 while(isALNUM(*s) || *s == ':') ++s;
3186 sv_catpvs(sv, "::");
3187 sv_catpvn(sv, start, s-start);
3190 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3193 else if (*s != '\0') {
3194 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3196 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3200 forbid_setid('M', -1); /* XXX ? */
3203 forbid_setid('m', -1); /* XXX ? */
3207 const char *use = "use ";
3208 /* -M-foo == 'no foo' */
3209 /* Leading space on " no " is deliberate, to make both
3210 possibilities the same length. */
3211 if (*s == '-') { use = " no "; ++s; }
3212 sv = newSVpvn(use,4);
3214 /* We allow -M'Module qw(Foo Bar)' */
3215 while(isALNUM(*s) || *s==':') ++s;
3217 sv_catpv(sv, start);
3218 if (*(start-1) == 'm') {
3220 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3221 sv_catpvs( sv, " ()");
3225 Perl_croak(aTHX_ "Module name required with -%c option",
3227 sv_catpvn(sv, start, s-start);
3228 sv_catpvs(sv, " split(/,/,q");
3229 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3231 sv_catpvs(sv, "\0)");
3234 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3237 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3248 forbid_setid('s', -1);
3249 PL_doswitches = TRUE;
3263 #ifdef MACOS_TRADITIONAL
3264 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3266 PL_do_undump = TRUE;
3274 if (!sv_derived_from(PL_patchlevel, "version"))
3275 upg_version(PL_patchlevel);
3277 PerlIO_printf(PerlIO_stdout(),
3278 Perl_form(aTHX_ "\nThis is perl, %"SVf
3279 #ifdef PERL_PATCHNUM
3280 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3283 SVfARG(vstringify(PL_patchlevel)),
3286 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3287 PerlIO_printf(PerlIO_stdout(),
3288 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3289 SVfARG(vstringify(PL_patchlevel))));
3290 PerlIO_printf(PerlIO_stdout(),
3291 Perl_form(aTHX_ " built under %s at %s %s\n",
3292 OSNAME, __DATE__, __TIME__));
3293 PerlIO_printf(PerlIO_stdout(),
3294 Perl_form(aTHX_ " OS Specific Release: %s\n",
3298 #if defined(LOCAL_PATCH_COUNT)
3299 if (LOCAL_PATCH_COUNT > 0)
3300 PerlIO_printf(PerlIO_stdout(),
3301 "\n(with %d registered patch%s, "
3302 "see perl -V for more detail)",
3304 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "\n\nCopyright 1987-2007, Larry Wall\n");
3309 #ifdef MACOS_TRADITIONAL
3310 PerlIO_printf(PerlIO_stdout(),
3311 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3312 "maintained by Chris Nandor\n");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3321 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3324 PerlIO_printf(PerlIO_stdout(),
3325 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3326 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3329 PerlIO_printf(PerlIO_stdout(),
3330 "atariST series port, ++jrb bammi@cadence.com\n");
3333 PerlIO_printf(PerlIO_stdout(),
3334 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3337 PerlIO_printf(PerlIO_stdout(),
3338 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3341 PerlIO_printf(PerlIO_stdout(),
3342 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "MiNT port by Guido Flohr, 1997-1999\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "EPOC port by Olaf Flebbe, 1999-2002\n");
3365 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3366 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3369 #ifdef __SYMBIAN32__
3370 PerlIO_printf(PerlIO_stdout(),
3371 "Symbian port by Nokia, 2004-2005\n");
3373 #ifdef BINARY_BUILD_NOTICE
3374 BINARY_BUILD_NOTICE;
3376 PerlIO_printf(PerlIO_stdout(),
3378 Perl may be copied only under the terms of either the Artistic License or the\n\
3379 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3380 Complete documentation for Perl, including FAQ lists, should be found on\n\
3381 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3382 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3385 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3386 PL_dowarn |= G_WARN_ON;
3391 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3392 if (!specialWARN(PL_compiling.cop_warnings))
3393 PerlMemShared_free(PL_compiling.cop_warnings);
3394 PL_compiling.cop_warnings = pWARN_ALL ;
3398 PL_dowarn = G_WARN_ALL_OFF;
3399 if (!specialWARN(PL_compiling.cop_warnings))
3400 PerlMemShared_free(PL_compiling.cop_warnings);
3401 PL_compiling.cop_warnings = pWARN_NONE ;
3406 if (s[1] == '-') /* Additional switches on #! line. */
3411 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3417 #ifdef ALTERNATE_SHEBANG
3418 case 'S': /* OS/2 needs -S on "extproc" line. */
3426 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3431 /* compliments of Tom Christiansen */
3433 /* unexec() can be found in the Gnu emacs distribution */
3434 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3437 Perl_my_unexec(pTHX)
3439 PERL_UNUSED_CONTEXT;
3441 SV * prog = newSVpv(BIN_EXP, 0);
3442 SV * file = newSVpv(PL_origfilename, 0);
3446 sv_catpvs(prog, "/perl");
3447 sv_catpvs(file, ".perldump");
3449 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3450 /* unexec prints msg to stderr in case of failure */
3451 PerlProc_exit(status);
3454 # include <lib$routines.h>
3455 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3456 # elif defined(WIN32) || defined(__CYGWIN__)
3457 Perl_croak(aTHX_ "dump is not supported");
3459 ABORT(); /* for use with undump */
3464 /* initialize curinterp */
3470 # define PERLVAR(var,type)
3471 # define PERLVARA(var,n,type)
3472 # if defined(PERL_IMPLICIT_CONTEXT)
3473 # define PERLVARI(var,type,init) aTHX->var = init;
3474 # define PERLVARIC(var,type,init) aTHX->var = init;
3476 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3477 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3479 # include "intrpvar.h"
3480 # include "thrdvar.h"
3486 # define PERLVAR(var,type)
3487 # define PERLVARA(var,n,type)
3488 # define PERLVARI(var,type,init) PL_##var = init;
3489 # define PERLVARIC(var,type,init) PL_##var = init;
3490 # include "intrpvar.h"
3491 # include "thrdvar.h"
3498 /* As these are inside a structure, PERLVARI isn't capable of initialising
3500 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3501 PL_reg_poscache = PL_reg_starttry = NULL;
3505 S_init_main_stash(pTHX)
3510 PL_curstash = PL_defstash = newHV();
3511 /* We know that the string "main" will be in the global shared string
3512 table, so it's a small saving to use it rather than allocate another
3514 PL_curstname = newSVpvs_share("main");
3515 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3516 /* If we hadn't caused another reference to "main" to be in the shared
3517 string table above, then it would be worth reordering these two,
3518 because otherwise all we do is delete "main" from it as a consequence
3519 of the SvREFCNT_dec, only to add it again with hv_name_set */
3520 SvREFCNT_dec(GvHV(gv));
3521 hv_name_set(PL_defstash, "main", 4, 0);
3522 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3524 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3526 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3527 GvMULTI_on(PL_incgv);
3528 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3529 GvMULTI_on(PL_hintgv);
3530 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3531 SvREFCNT_inc_simple(PL_defgv);
3532 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3533 SvREFCNT_inc_simple(PL_errgv);
3534 GvMULTI_on(PL_errgv);
3535 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3536 GvMULTI_on(PL_replgv);
3537 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3538 #ifdef PERL_DONT_CREATE_GVSV
3541 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3542 sv_setpvn(ERRSV, "", 0);
3543 PL_curstash = PL_defstash;
3544 CopSTASH_set(&PL_compiling, PL_defstash);
3545 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3546 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3548 /* We must init $/ before switches are processed. */
3549 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3553 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3559 const char *cpp_discard_flag;
3568 PL_origfilename = savepvs("-e");
3571 /* if find_script() returns, it returns a malloc()-ed value */
3572 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3574 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3575 const char *s = scriptname + 8;
3581 * Tell apart "normal" usage of fdscript, e.g.
3582 * with bash on FreeBSD:
3583 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3584 * from usage in suidperl.
3585 * Does any "normal" usage leave garbage after the number???
3586 * Is it a mistake to use a similar /dev/fd/ construct for
3591 * Be supersafe and do some sanity-checks.
3592 * Still, can we be sure we got the right thing?
3595 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3598 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3600 scriptname = savepv(s + 1);
3601 Safefree(PL_origfilename);
3602 PL_origfilename = (char *)scriptname;
3607 CopFILE_free(PL_curcop);
3608 CopFILE_set(PL_curcop, PL_origfilename);
3609 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3610 scriptname = (char *)"";
3611 if (fdscript >= 0) {
3612 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3613 # if defined(HAS_FCNTL) && defined(F_SETFD)
3615 /* ensure close-on-exec */
3616 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3621 Perl_croak(aTHX_ "sperl needs fd script\n"
3622 "You should not call sperl directly; do you need to "
3623 "change a #! line\nfrom sperl to perl?\n");
3626 * Do not open (or do other fancy stuff) while setuid.
3627 * Perl does the open, and hands script to suidperl on a fd;
3628 * suidperl only does some checks, sets up UIDs and re-execs
3629 * perl with that fd as it has always done.
3632 if (*suidscript != 1) {
3633 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3636 else if (PL_preprocess) {
3637 const char * const cpp_cfg = CPPSTDIN;
3638 SV * const cpp = newSVpvs("");
3639 SV * const cmd = newSV(0);
3641 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3642 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3643 if (strEQ(cpp_cfg, "cppstdin"))
3644 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3645 sv_catpv(cpp, cpp_cfg);
3648 sv_catpvs(sv, "-I");
3649 sv_catpv(sv,PRIVLIB_EXP);
3652 DEBUG_P(PerlIO_printf(Perl_debug_log,
3653 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3654 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3657 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3664 cpp_discard_flag = "";
3666 cpp_discard_flag = "-C";
3670 perl = os2_execname(aTHX);
3672 perl = PL_origargv[0];
3676 /* This strips off Perl comments which might interfere with
3677 the C pre-processor, including #!. #line directives are
3678 deliberately stripped to avoid confusion with Perl's version
3679 of #line. FWP played some golf with it so it will fit
3680 into VMS's 255 character buffer.
3683 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3685 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3687 Perl_sv_setpvf(aTHX_ cmd, "\
3688 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3689 perl, quote, code, quote, scriptname, SVfARG(cpp),
3690 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3692 PL_doextract = FALSE;
3694 DEBUG_P(PerlIO_printf(Perl_debug_log,
3695 "PL_preprocess: cmd=\"%s\"\n",
3698 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3702 else if (!*scriptname) {
3703 forbid_setid(0, *suidscript);
3704 PL_rsfp = PerlIO_stdin();
3707 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3708 # if defined(HAS_FCNTL) && defined(F_SETFD)
3710 /* ensure close-on-exec */
3711 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3714 #endif /* IAMSUID */
3716 /* PSz 16 Sep 03 Keep neat error message */
3718 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3720 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3721 CopFILE(PL_curcop), Strerror(errno));
3727 * I_SYSSTATVFS HAS_FSTATVFS
3729 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3730 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3731 * here so that metaconfig picks them up. */
3735 S_fd_on_nosuid_fs(pTHX_ int fd)
3738 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3739 * but is needed also on machines without setreuid.
3740 * Seems safe enough to run as root.
3742 int check_okay = 0; /* able to do all the required sys/libcalls */
3743 int on_nosuid = 0; /* the fd is on a nosuid fs */
3745 * Need to check noexec also: nosuid might not be set, the average
3746 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3748 int on_noexec = 0; /* the fd is on a noexec fs */
3751 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3752 * fstatvfs() is UNIX98.
3753 * fstatfs() is 4.3 BSD.
3754 * ustat()+getmnt() is pre-4.3 BSD.
3755 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3756 * an irrelevant filesystem while trying to reach the right one.
3759 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3761 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3762 defined(HAS_FSTATVFS)
3763 # define FD_ON_NOSUID_CHECK_OKAY
3764 struct statvfs stfs;
3766 check_okay = fstatvfs(fd, &stfs) == 0;
3767 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3769 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3770 on platforms where it is present. */
3771 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3773 # endif /* fstatvfs */
3775 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3776 defined(PERL_MOUNT_NOSUID) && \
3777 defined(PERL_MOUNT_NOEXEC) && \
3778 defined(HAS_FSTATFS) && \
3779 defined(HAS_STRUCT_STATFS) && \
3780 defined(HAS_STRUCT_STATFS_F_FLAGS)
3781 # define FD_ON_NOSUID_CHECK_OKAY
3784 check_okay = fstatfs(fd, &stfs) == 0;
3785 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3786 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3787 # endif /* fstatfs */
3789 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3790 defined(PERL_MOUNT_NOSUID) && \
3791 defined(PERL_MOUNT_NOEXEC) && \
3792 defined(HAS_FSTAT) && \
3793 defined(HAS_USTAT) && \
3794 defined(HAS_GETMNT) && \
3795 defined(HAS_STRUCT_FS_DATA) && \
3797 # define FD_ON_NOSUID_CHECK_OKAY
3800 if (fstat(fd, &fdst) == 0) {
3802 if (ustat(fdst.st_dev, &us) == 0) {
3804 /* NOSTAT_ONE here because we're not examining fields which
3805 * vary between that case and STAT_ONE. */
3806 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3807 size_t cmplen = sizeof(us.f_fname);
3808 if (sizeof(fsd.fd_req.path) < cmplen)
3809 cmplen = sizeof(fsd.fd_req.path);
3810 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3811 fdst.st_dev == fsd.fd_req.dev) {
3813 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3814 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3819 # endif /* fstat+ustat+getmnt */
3821 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3822 defined(HAS_GETMNTENT) && \
3823 defined(HAS_HASMNTOPT) && \
3824 defined(MNTOPT_NOSUID) && \
3825 defined(MNTOPT_NOEXEC)
3826 # define FD_ON_NOSUID_CHECK_OKAY
3827 FILE *mtab = fopen("/etc/mtab", "r");
3828 struct mntent *entry;
3831 if (mtab && (fstat(fd, &stb) == 0)) {
3832 while (entry = getmntent(mtab)) {
3833 if (stat(entry->mnt_dir, &fsb) == 0
3834 && fsb.st_dev == stb.st_dev)
3836 /* found the filesystem */
3838 if (hasmntopt(entry, MNTOPT_NOSUID))
3840 if (hasmntopt(entry, MNTOPT_NOEXEC))
3843 } /* A single fs may well fail its stat(). */
3848 # endif /* getmntent+hasmntopt */
3851 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3853 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3855 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3856 return ((!check_okay) || on_nosuid || on_noexec);
3858 #endif /* IAMSUID */
3861 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3862 int fdscript, int suidscript)
3867 #endif /* IAMSUID */
3869 /* do we need to emulate setuid on scripts? */
3871 /* This code is for those BSD systems that have setuid #! scripts disabled
3872 * in the kernel because of a security problem. Merely defining DOSUID
3873 * in perl will not fix that problem, but if you have disabled setuid
3874 * scripts in the kernel, this will attempt to emulate setuid and setgid
3875 * on scripts that have those now-otherwise-useless bits set. The setuid
3876 * root version must be called suidperl or sperlN.NNN. If regular perl
3877 * discovers that it has opened a setuid script, it calls suidperl with
3878 * the same argv that it had. If suidperl finds that the script it has
3879 * just opened is NOT setuid root, it sets the effective uid back to the
3880 * uid. We don't just make perl setuid root because that loses the
3881 * effective uid we had before invoking perl, if it was different from the
3884 * Description/comments above do not match current workings:
3885 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3886 * suidperl called with script open and name changed to /dev/fd/N/X;
3887 * suidperl croaks if script is not setuid;
3888 * making perl setuid would be a huge security risk (and yes, that
3889 * would lose any euid we might have had).
3891 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3892 * be defined in suidperl only. suidperl must be setuid root. The
3893 * Configure script will set this up for you if you want it.
3899 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3900 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3901 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3903 const char *linestr;
3907 if (fdscript < 0 || suidscript != 1)
3908 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3910 * Since the script is opened by perl, not suidperl, some of these
3911 * checks are superfluous. Leaving them in probably does not lower
3915 * Do checks even for systems with no HAS_SETREUID.
3916 * We used to swap, then re-swap UIDs with
3918 if (setreuid(PL_euid,PL_uid) < 0
3919 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3920 Perl_croak(aTHX_ "Can't swap uid and euid");
3923 if (setreuid(PL_uid,PL_euid) < 0
3924 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3925 Perl_croak(aTHX_ "Can't reswap uid and euid");
3929 /* On this access check to make sure the directories are readable,
3930 * there is actually a small window that the user could use to make
3931 * filename point to an accessible directory. So there is a faint
3932 * chance that someone could execute a setuid script down in a
3933 * non-accessible directory. I don't know what to do about that.
3934 * But I don't think it's too important. The manual lies when
3935 * it says access() is useful in setuid programs.
3937 * So, access() is pretty useless... but not harmful... do anyway.
3939 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3940 Perl_croak(aTHX_ "Can't access() script\n");
3943 /* If we can swap euid and uid, then we can determine access rights
3944 * with a simple stat of the file, and then compare device and
3945 * inode to make sure we did stat() on the same file we opened.
3946 * Then we just have to make sure he or she can execute it.
3949 * As the script is opened by perl, not suidperl, we do not need to
3950 * care much about access rights.
3952 * The 'script changed' check is needed, or we can get lied to
3953 * about $0 with e.g.
3954 * suidperl /dev/fd/4//bin/x 4<setuidscript
3955 * Without HAS_SETREUID, is it safe to stat() as root?
3957 * Are there any operating systems that pass /dev/fd/xxx for setuid
3958 * scripts, as suggested/described in perlsec(1)? Surely they do not
3959 * pass the script name as we do, so the "script changed" test would
3960 * fail for them... but we never get here with
3961 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3963 * This is one place where we must "lie" about return status: not
3964 * say if the stat() failed. We are doing this as root, and could
3965 * be tricked into reporting existence or not of files that the
3966 * "plain" user cannot even see.
3970 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3971 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3972 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3973 Perl_croak(aTHX_ "Setuid script changed\n");
3977 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3978 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3981 * We used to do this check as the "plain" user (after swapping
3982 * UIDs). But the check for nosuid and noexec filesystem is needed,
3983 * and should be done even without HAS_SETREUID. (Maybe those
3984 * operating systems do not have such mount options anyway...)
3985 * Seems safe enough to do as root.
3987 #if !defined(NO_NOSUID_CHECK)
3988 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3989 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3992 #endif /* IAMSUID */
3994 if (!S_ISREG(PL_statbuf.st_mode)) {
3995 Perl_croak(aTHX_ "Setuid script not plain file\n");
3997 if (PL_statbuf.st_mode & S_IWOTH)
3998 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3999 PL_doswitches = FALSE; /* -s is insecure in suid */
4000 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4001 CopLINE_inc(PL_curcop);
4002 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4003 Perl_croak(aTHX_ "No #! line");
4004 linestr = SvPV_nolen_const(PL_linestr);
4005 /* required even on Sys V */
4006 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4007 Perl_croak(aTHX_ "No #! line");
4011 /* Sanity check on line length */
4012 s_end = s + strlen(s);
4013 if (s_end == s || (s_end - s) > 4000)
4014 Perl_croak(aTHX_ "Very long #! line");
4015 /* Allow more than a single space after #! */
4016 while (isSPACE(*s)) s++;
4017 /* Sanity check on buffer end */
4018 while ((*s) && !isSPACE(*s)) s++;
4019 for (s2 = s; (s2 > linestr &&
4020 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4021 || s2[-1] == '-')); s2--) ;
4022 /* Sanity check on buffer start */
4023 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4024 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4025 Perl_croak(aTHX_ "Not a perl script");
4026 while (*s == ' ' || *s == '\t') s++;
4028 * #! arg must be what we saw above. They can invoke it by
4029 * mentioning suidperl explicitly, but they may not add any strange
4030 * arguments beyond what #! says if they do invoke suidperl that way.
4033 * The way validarg was set up, we rely on the kernel to start
4034 * scripts with argv[1] set to contain all #! line switches (the
4038 * Check that we got all the arguments listed in the #! line (not
4039 * just that there are no extraneous arguments). Might not matter
4040 * much, as switches from #! line seem to be acted upon (also), and
4041 * so may be checked and trapped in perl. But, security checks must
4042 * be done in suidperl and not deferred to perl. Note that suidperl
4043 * does not get around to parsing (and checking) the switches on
4044 * the #! line (but execs perl sooner).
4045 * Allow (require) a trailing newline (which may be of two
4046 * characters on some architectures?) (but no other trailing
4049 len = strlen(validarg);
4050 if (strEQ(validarg," PHOOEY ") ||
4051 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4052 !((s_end - s) == len+1
4053 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4054 Perl_croak(aTHX_ "Args must match #! line");
4058 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4059 PL_euid == PL_statbuf.st_uid)
4061 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4062 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4063 #endif /* IAMSUID */
4066 PL_euid) { /* oops, we're not the setuid root perl */
4068 * When root runs a setuid script, we do not go through the same
4069 * steps of execing sperl and then perl with fd scripts, but
4070 * simply set up UIDs within the same perl invocation; so do
4071 * not have the same checks (on options, whatever) that we have
4072 * for plain users. No problem really: would have to be a script
4073 * that does not actually work for plain users; and if root is
4074 * foolish and can be persuaded to run such an unsafe script, he
4075 * might run also non-setuid ones, and deserves what he gets.
4077 * Or, we might drop the PL_euid check above (and rely just on
4078 * fdscript to avoid loops), and do the execs
4084 * Pass fd script to suidperl.
4085 * Exec suidperl, substituting fd script for scriptname.
4086 * Pass script name as "subdir" of fd, which perl will grok;
4087 * in fact will use that to distinguish this from "normal"
4088 * usage, see comments above.
4090 PerlIO_rewind(PL_rsfp);
4091 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4092 /* PSz 27 Feb 04 Sanity checks on scriptname */
4093 if ((!scriptname) || (!*scriptname) ) {
4094 Perl_croak(aTHX_ "No setuid script name\n");
4096 if (*scriptname == '-') {
4097 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4098 /* Or we might confuse it with an option when replacing
4099 * name in argument list, below (though we do pointer, not
4100 * string, comparisons).
4103 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4104 if (!PL_origargv[which]) {
4105 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4107 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4108 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4109 #if defined(HAS_FCNTL) && defined(F_SETFD)
4110 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4113 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4114 (int)PERL_REVISION, (int)PERL_VERSION,
4115 (int)PERL_SUBVERSION), PL_origargv);
4117 #endif /* IAMSUID */
4118 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4121 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4123 * This seems back to front: we try HAS_SETEGID first; if not available
4124 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4125 * in the sense that we only want to set EGID; but are there any machines
4126 * with either of the latter, but not the former? Same with UID, later.
4129 (void)setegid(PL_statbuf.st_gid);
4132 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4134 #ifdef HAS_SETRESGID
4135 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4137 PerlProc_setgid(PL_statbuf.st_gid);
4141 if (PerlProc_getegid() != PL_statbuf.st_gid)
4142 Perl_croak(aTHX_ "Can't do setegid!\n");
4144 if (PL_statbuf.st_mode & S_ISUID) {
4145 if (PL_statbuf.st_uid != PL_euid)
4147 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4150 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4152 #ifdef HAS_SETRESUID
4153 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4155 PerlProc_setuid(PL_statbuf.st_uid);
4159 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4160 Perl_croak(aTHX_ "Can't do seteuid!\n");
4162 else if (PL_uid) { /* oops, mustn't run as root */
4164 (void)seteuid((Uid_t)PL_uid);
4167 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4169 #ifdef HAS_SETRESUID
4170 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4172 PerlProc_setuid((Uid_t)PL_uid);
4176 if (PerlProc_geteuid() != PL_uid)
4177 Perl_croak(aTHX_ "Can't do seteuid!\n");
4180 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4181 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4184 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4185 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4186 else if (fdscript < 0 || suidscript != 1)
4187 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4188 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4190 /* PSz 16 Sep 03 Keep neat error message */
4191 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4194 /* We absolutely must clear out any saved ids here, so we */
4195 /* exec the real perl, substituting fd script for scriptname. */
4196 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4198 * It might be thought that using setresgid and/or setresuid (changed to
4199 * set the saved IDs) above might obviate the need to exec, and we could
4200 * go on to "do the perl thing".
4202 * Is there such a thing as "saved GID", and is that set for setuid (but
4203 * not setgid) execution like suidperl? Without exec, it would not be
4204 * cleared for setuid (but not setgid) scripts (or might need a dummy
4207 * We need suidperl to do the exact same argument checking that perl
4208 * does. Thus it cannot be very small; while it could be significantly
4209 * smaller, it is safer (simpler?) to make it essentially the same
4210 * binary as perl (but they are not identical). - Maybe could defer that
4211 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4212 * but prefer to do thorough checks in suidperl itself. Such deferral
4213 * would make suidperl security rely on perl, a design no-no.
4215 * Setuid things should be short and simple, thus easy to understand and
4216 * verify. They should do their "own thing", without influence by
4217 * attackers. It may help if their internal execution flow is fixed,
4218 * regardless of platform: it may be best to exec anyway.
4220 * Suidperl should at least be conceptually simple: a wrapper only,
4221 * never to do any real perl. Maybe we should put
4223 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4225 * into the perly bits.
4227 PerlIO_rewind(PL_rsfp);
4228 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4230 * Keep original arguments: suidperl already has fd script.
4232 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4233 /* if (!PL_origargv[which]) { */
4234 /* errno = EPERM; */
4235 /* Perl_croak(aTHX_ "Permission denied\n"); */
4237 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4238 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4239 #if defined(HAS_FCNTL) && defined(F_SETFD)
4240 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4243 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4244 (int)PERL_REVISION, (int)PERL_VERSION,
4245 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4247 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4248 #endif /* IAMSUID */
4250 PERL_UNUSED_ARG(fdscript);
4251 PERL_UNUSED_ARG(suidscript);
4252 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4253 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4254 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4255 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4257 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4260 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4261 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4262 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4263 /* not set-id, must be wrapped */
4266 PERL_UNUSED_ARG(validarg);
4267 PERL_UNUSED_ARG(scriptname);
4271 S_find_beginning(pTHX)
4275 register const char *s2;
4276 #ifdef MACOS_TRADITIONAL
4280 /* skip forward in input to the real script? */
4282 #ifdef MACOS_TRADITIONAL
4283 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4285 while (PL_doextract || gMacPerl_AlwaysExtract) {
4286 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4287 if (!gMacPerl_AlwaysExtract)
4288 Perl_croak(aTHX_ "No Perl script found in input\n");
4290 if (PL_doextract) /* require explicit override ? */
4291 if (!OverrideExtract(PL_origfilename))
4292 Perl_croak(aTHX_ "User aborted script\n");
4294 PL_doextract = FALSE;
4296 /* Pater peccavi, file does not have #! */
4297 PerlIO_rewind(PL_rsfp);
4302 while (PL_doextract) {
4303 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4304 Perl_croak(aTHX_ "No Perl script found in input\n");
4307 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4308 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4309 PL_doextract = FALSE;
4310 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4312 while (*s == ' ' || *s == '\t') s++;
4314 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4315 || s2[-1] == '_') s2--;
4316 if (strnEQ(s2-4,"perl",4))
4317 while ((s = moreswitches(s)))
4320 #ifdef MACOS_TRADITIONAL
4321 /* We are always searching for the #!perl line in MacPerl,
4322 * so if we find it, still keep the line count correct
4323 * by counting lines we already skipped over
4325 for (; maclines > 0 ; maclines--)
4326 PerlIO_ungetc(PL_rsfp, '\n');
4330 /* gMacPerl_AlwaysExtract is false in MPW tool */
4331 } else if (gMacPerl_AlwaysExtract) {
4343 PL_uid = PerlProc_getuid();
4344 PL_euid = PerlProc_geteuid();
4345 PL_gid = PerlProc_getgid();
4346 PL_egid = PerlProc_getegid();
4348 PL_uid |= PL_gid << 16;
4349 PL_euid |= PL_egid << 16;
4351 /* Should not happen: */
4352 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4353 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4356 * Should go by suidscript, not uid!=euid: why disallow
4357 * system("ls") in scripts run from setuid things?
4358 * Or, is this run before we check arguments and set suidscript?
4359 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4360 * (We never have suidscript, can we be sure to have fdscript?)
4361 * Or must then go by UID checks? See comments in forbid_setid also.
4365 /* This is used very early in the lifetime of the program,
4366 * before even the options are parsed, so PL_tainting has
4367 * not been initialized properly. */
4369 Perl_doing_taint(int argc, char *argv[], char *envp[])
4371 #ifndef PERL_IMPLICIT_SYS
4372 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4373 * before we have an interpreter-- and the whole point of this
4374 * function is to be called at such an early stage. If you are on
4375 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4376 * "tainted because running with altered effective ids', you'll
4377 * have to add your own checks somewhere in here. The two most
4378 * known samples of 'implicitness' are Win32 and NetWare, neither
4379 * of which has much of concept of 'uids'. */
4380 int uid = PerlProc_getuid();
4381 int euid = PerlProc_geteuid();
4382 int gid = PerlProc_getgid();
4383 int egid = PerlProc_getegid();
4390 if (uid && (euid != uid || egid != gid))
4392 #endif /* !PERL_IMPLICIT_SYS */
4393 /* This is a really primitive check; environment gets ignored only
4394 * if -T are the first chars together; otherwise one gets
4395 * "Too late" message. */
4396 if ( argc > 1 && argv[1][0] == '-'
4397 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4402 /* Passing the flag as a single char rather than a string is a slight space
4403 optimisation. The only message that isn't /^-.$/ is
4404 "program input from stdin", which is substituted in place of '\0', which
4405 could never be a command line flag. */
4407 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4410 char string[3] = "-x";
4411 const char *message = "program input from stdin";
4418 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4419 if (PL_euid != PL_uid)
4420 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4421 if (PL_egid != PL_gid)
4422 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4423 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4425 * Checks for UID/GID above "wrong": why disallow
4426 * perl -e 'print "Hello\n"'
4427 * from within setuid things?? Simply drop them: replaced by
4428 * fdscript/suidscript and #ifdef IAMSUID checks below.
4430 * This may be too late for command-line switches. Will catch those on
4431 * the #! line, after finding the script name and setting up
4432 * fdscript/suidscript. Note that suidperl does not get around to
4433 * parsing (and checking) the switches on the #! line, but checks that
4434 * the two sets are identical.
4436 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4437 * instead, or would that be "too late"? (We never have suidscript, can
4438 * we be sure to have fdscript?)
4440 * Catch things with suidscript (in descendant of suidperl), even with
4441 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4442 * below; but I am paranoid.
4444 * Also see comments about root running a setuid script, elsewhere.
4446 if (suidscript >= 0)
4447 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4449 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4450 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4451 #endif /* IAMSUID */
4455 Perl_init_debugger(pTHX)
4458 HV * const ostash = PL_curstash;
4460 PL_curstash = PL_debstash;
4461 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4463 AvREAL_off(PL_dbargs);
4464 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4465 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4466 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4467 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4468 sv_setiv(PL_DBsingle, 0);
4469 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4470 sv_setiv(PL_DBtrace, 0);
4471 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4472 sv_setiv(PL_DBsignal, 0);
4473 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4474 sv_setiv(PL_DBassertion, 0);
4475 PL_curstash = ostash;
4478 #ifndef STRESS_REALLOC
4479 #define REASONABLE(size) (size)
4481 #define REASONABLE(size) (1) /* unreasonable */
4485 Perl_init_stacks(pTHX)
4488 /* start with 128-item stack and 8K cxstack */
4489 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4490 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4491 PL_curstackinfo->si_type = PERLSI_MAIN;
4492 PL_curstack = PL_curstackinfo->si_stack;
4493 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4495 PL_stack_base = AvARRAY(PL_curstack);
4496 PL_stack_sp = PL_stack_base;
4497 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4499 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4502 PL_tmps_max = REASONABLE(128);
4504 Newx(PL_markstack,REASONABLE(32),I32);
4505 PL_markstack_ptr = PL_markstack;
4506 PL_markstack_max = PL_markstack + REASONABLE(32);
4510 Newx(PL_scopestack,REASONABLE(32),I32);
4511 PL_scopestack_ix = 0;
4512 PL_scopestack_max = REASONABLE(32);
4514 Newx(PL_savestack,REASONABLE(128),ANY);
4515 PL_savestack_ix = 0;
4516 PL_savestack_max = REASONABLE(128);
4525 while (PL_curstackinfo->si_next)
4526 PL_curstackinfo = PL_curstackinfo->si_next;
4527 while (PL_curstackinfo) {
4528 PERL_SI *p = PL_curstackinfo->si_prev;
4529 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4530 Safefree(PL_curstackinfo->si_cxstack);
4531 Safefree(PL_curstackinfo);
4532 PL_curstackinfo = p;
4534 Safefree(PL_tmps_stack);
4535 Safefree(PL_markstack);
4536 Safefree(PL_scopestack);
4537 Safefree(PL_savestack);
4547 lex_start(PL_linestr);
4549 PL_subname = newSVpvs("main");
4553 S_init_predump_symbols(pTHX)
4559 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4560 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4561 GvMULTI_on(PL_stdingv);
4562 io = GvIOp(PL_stdingv);
4563 IoTYPE(io) = IoTYPE_RDONLY;
4564 IoIFP(io) = PerlIO_stdin();
4565 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4567 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4569 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4572 IoTYPE(io) = IoTYPE_WRONLY;
4573 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4575 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4577 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4579 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4580 GvMULTI_on(PL_stderrgv);
4581 io = GvIOp(PL_stderrgv);
4582 IoTYPE(io) = IoTYPE_WRONLY;
4583 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4584 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4586 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4588 PL_statname = newSV(0); /* last filename we did stat on */
4590 Safefree(PL_osname);
4591 PL_osname = savepv(OSNAME);
4595 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4598 argc--,argv++; /* skip name of script */
4599 if (PL_doswitches) {
4600 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4604 if (argv[0][1] == '-' && !argv[0][2]) {
4608 if ((s = strchr(argv[0], '='))) {
4609 const char *const start_name = argv[0] + 1;
4610 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4611 TRUE, SVt_PV)), s + 1);
4614 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4617 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4618 GvMULTI_on(PL_argvgv);
4619 (void)gv_AVadd(PL_argvgv);
4620 av_clear(GvAVn(PL_argvgv));
4621 for (; argc > 0; argc--,argv++) {
4622 SV * const sv = newSVpv(argv[0],0);
4623 av_push(GvAVn(PL_argvgv),sv);
4624 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4625 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4628 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4629 (void)sv_utf8_decode(sv);
4635 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4640 PL_toptarget = newSV(0);
4641 sv_upgrade(PL_toptarget, SVt_PVFM);
4642 sv_setpvn(PL_toptarget, "", 0);
4643 PL_bodytarget = newSV(0);
4644 sv_upgrade(PL_bodytarget, SVt_PVFM);
4645 sv_setpvn(PL_bodytarget, "", 0);
4646 PL_formtarget = PL_bodytarget;
4650 init_argv_symbols(argc,argv);
4652 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4653 #ifdef MACOS_TRADITIONAL
4654 /* $0 is not majick on a Mac */
4655 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4657 sv_setpv(GvSV(tmpgv),PL_origfilename);
4658 magicname("0", "0", 1);
4661 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4663 bool env_is_not_environ;
4664 GvMULTI_on(PL_envgv);
4665 hv = GvHVn(PL_envgv);
4666 hv_magic(hv, NULL, PERL_MAGIC_env);
4668 #ifdef USE_ENVIRON_ARRAY
4669 /* Note that if the supplied env parameter is actually a copy
4670 of the global environ then it may now point to free'd memory
4671 if the environment has been modified since. To avoid this
4672 problem we treat env==NULL as meaning 'use the default'
4676 env_is_not_environ = env != environ;
4677 if (env_is_not_environ
4678 # ifdef USE_ITHREADS
4679 && PL_curinterp == aTHX
4686 char** origenv = environ;
4689 for (; *env; env++) {
4690 if (!(s = strchr(*env,'=')) || s == *env)
4692 #if defined(MSDOS) && !defined(DJGPP)
4697 sv = newSVpv(s+1, 0);
4698 (void)hv_store(hv, *env, s - *env, sv, 0);
4699 if (env_is_not_environ)
4701 if (origenv != environ) {
4702 /* realloc has shifted us */
4703 env = (env - origenv) + environ;
4708 #endif /* USE_ENVIRON_ARRAY */
4709 #endif /* !PERL_MICRO */
4712 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4713 SvREADONLY_off(GvSV(tmpgv));
4714 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4715 SvREADONLY_on(GvSV(tmpgv));
4717 #ifdef THREADS_HAVE_PIDS
4718 PL_ppid = (IV)getppid();
4721 /* touch @F array to prevent spurious warnings 20020415 MJD */
4723 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4725 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4726 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4727 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4731 S_init_perllib(pTHX)
4737 s = PerlEnv_getenv("PERL5LIB");
4739 * It isn't possible to delete an environment variable with
4740 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4741 * case we treat PERL5LIB as undefined if it has a zero-length value.
4743 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4744 if (s && *s != '\0')
4748 incpush(s, TRUE, TRUE, TRUE, FALSE);
4750 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4752 /* Treat PERL5?LIB as a possible search list logical name -- the
4753 * "natural" VMS idiom for a Unix path string. We allow each
4754 * element to be a set of |-separated directories for compatibility.
4758 if (my_trnlnm("PERL5LIB",buf,0))
4759 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4761 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4765 /* Use the ~-expanded versions of APPLLIB (undocumented),
4766 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4769 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4773 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4775 #ifdef MACOS_TRADITIONAL
4778 SV * privdir = newSV(0);
4779 char * macperl = PerlEnv_getenv("MACPERL");
4784 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4785 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4786 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4787 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4788 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4789 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4791 SvREFCNT_dec(privdir);
4794 incpush(":", FALSE, FALSE, TRUE, FALSE);
4797 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4800 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4802 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4806 /* sitearch is always relative to sitelib on Windows for
4807 * DLL-based path intuition to work correctly */
4808 # if !defined(WIN32)
4809 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4815 /* this picks up sitearch as well */
4816 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4818 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4822 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4823 /* Search for version-specific dirs below here */
4824 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4827 #ifdef PERL_VENDORARCH_EXP
4828 /* vendorarch is always relative to vendorlib on Windows for
4829 * DLL-based path intuition to work correctly */
4830 # if !defined(WIN32)
4831 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4835 #ifdef PERL_VENDORLIB_EXP
4837 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4839 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4843 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4844 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4847 #ifdef PERL_OTHERLIBDIRS
4848 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4852 incpush(".", FALSE, FALSE, TRUE, FALSE);
4853 #endif /* MACOS_TRADITIONAL */
4856 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4857 # define PERLLIB_SEP ';'
4860 # define PERLLIB_SEP '|'
4862 # if defined(MACOS_TRADITIONAL)
4863 # define PERLLIB_SEP ','
4865 # define PERLLIB_SEP ':'
4869 #ifndef PERLLIB_MANGLE
4870 # define PERLLIB_MANGLE(s,n) (s)
4873 /* Push a directory onto @INC if it exists.
4874 Generate a new SV if we do this, to save needing to copy the SV we push
4877 S_incpush_if_exists(pTHX_ SV *dir)
4881 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4882 S_ISDIR(tmpstatbuf.st_mode)) {
4883 av_push(GvAVn(PL_incgv), dir);
4890 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4895 const char *p = dir;
4900 if (addsubdirs || addoldvers) {
4904 /* Break at all separators */
4906 SV *libdir = newSV(0);
4909 /* skip any consecutive separators */
4911 while ( *p == PERLLIB_SEP ) {
4912 /* Uncomment the next line for PATH semantics */
4913 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4918 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4919 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4924 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4925 p = NULL; /* break out */
4927 #ifdef MACOS_TRADITIONAL
4928 if (!strchr(SvPVX(libdir), ':')) {
4931 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4933 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4934 sv_catpvs(libdir, ":");
4937 /* Do the if() outside the #ifdef to avoid warnings about an unused
4940 #ifdef PERL_RELOCATABLE_INC
4942 * Relocatable include entries are marked with a leading .../
4945 * 0: Remove that leading ".../"
4946 * 1: Remove trailing executable name (anything after the last '/')
4947 * from the perl path to give a perl prefix
4949 * While the @INC element starts "../" and the prefix ends with a real
4950 * directory (ie not . or ..) chop that real directory off the prefix
4951 * and the leading "../" from the @INC element. ie a logical "../"
4953 * Finally concatenate the prefix and the remainder of the @INC element
4954 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4955 * generates /usr/local/lib/perl5
4957 const char *libpath = SvPVX(libdir);
4958 STRLEN libpath_len = SvCUR(libdir);
4959 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4961 SV * const caret_X = get_sv("\030", 0);
4962 /* Going to use the SV just as a scratch buffer holding a C
4968 /* $^X is *the* source of taint if tainting is on, hence
4969 SvPOK() won't be true. */
4971 assert(SvPOKp(caret_X));
4972 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4973 /* Firstly take off the leading .../
4974 If all else fail we'll do the paths relative to the current
4976 sv_chop(libdir, libpath + 4);
4977 /* Don't use SvPV as we're intentionally bypassing taining,
4978 mortal copies that the mg_get of tainting creates, and
4979 corruption that seems to come via the save stack.
4980 I guess that the save stack isn't correctly set up yet. */
4981 libpath = SvPVX(libdir);
4982 libpath_len = SvCUR(libdir);
4984 /* This would work more efficiently with memrchr, but as it's
4985 only a GNU extension we'd need to probe for it and
4986 implement our own. Not hard, but maybe not worth it? */
4988 prefix = SvPVX(prefix_sv);
4989 lastslash = strrchr(prefix, '/');
4991 /* First time in with the *lastslash = '\0' we just wipe off
4992 the trailing /perl from (say) /usr/foo/bin/perl
4996 while ((*lastslash = '\0'), /* Do that, come what may. */
4997 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4998 && (lastslash = strrchr(prefix, '/')))) {
4999 if (lastslash[1] == '\0'
5000 || (lastslash[1] == '.'
5001 && (lastslash[2] == '/' /* ends "/." */
5002 || (lastslash[2] == '/'
5003 && lastslash[3] == '/' /* or "/.." */
5005 /* Prefix ends "/" or "/." or "/..", any of which
5006 are fishy, so don't do any more logical cleanup.
5010 /* Remove leading "../" from path */
5013 /* Next iteration round the loop removes the last
5014 directory name from prefix by writing a '\0' in
5015 the while clause. */
5017 /* prefix has been terminated with a '\0' to the correct
5018 length. libpath points somewhere into the libdir SV.
5019 We need to join the 2 with '/' and drop the result into
5021 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5022 SvREFCNT_dec(libdir);
5023 /* And this is the new libdir. */
5026 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5027 /* Need to taint reloccated paths if running set ID */
5028 SvTAINTED_on(libdir);
5031 SvREFCNT_dec(prefix_sv);
5036 * BEFORE pushing libdir onto @INC we may first push version- and
5037 * archname-specific sub-directories.
5039 if (addsubdirs || addoldvers) {
5040 #ifdef PERL_INC_VERSION_LIST
5041 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5042 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5043 const char * const *incver;
5049 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5051 while (unix[len-1] == '/') len--; /* Cosmetic */
5052 sv_usepvn(libdir,unix,len);
5055 PerlIO_printf(Perl_error_log,
5056 "Failed to unixify @INC element \"%s\"\n",
5060 #ifdef MACOS_TRADITIONAL
5061 #define PERL_AV_SUFFIX_FMT ""
5062 #define PERL_ARCH_FMT "%s:"
5063 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5065 #define PERL_AV_SUFFIX_FMT "/"
5066 #define PERL_ARCH_FMT "/%s"
5067 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5069 /* .../version/archname if -d .../version/archname */
5070 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5072 (int)PERL_REVISION, (int)PERL_VERSION,
5073 (int)PERL_SUBVERSION, ARCHNAME);
5074 subdir = S_incpush_if_exists(aTHX_ subdir);
5076 /* .../version if -d .../version */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5079 (int)PERL_REVISION, (int)PERL_VERSION,
5080 (int)PERL_SUBVERSION);
5081 subdir = S_incpush_if_exists(aTHX_ subdir);
5083 /* .../archname if -d .../archname */
5084 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5085 SVfARG(libdir), ARCHNAME);
5086 subdir = S_incpush_if_exists(aTHX_ subdir);
5090 #ifdef PERL_INC_VERSION_LIST
5092 for (incver = incverlist; *incver; incver++) {
5093 /* .../xxx if -d .../xxx */
5094 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5095 SVfARG(libdir), *incver);
5096 subdir = S_incpush_if_exists(aTHX_ subdir);
5102 /* finally push this lib directory on the end of @INC */
5103 av_push(GvAVn(PL_incgv), libdir);
5106 assert (SvREFCNT(subdir) == 1);
5107 SvREFCNT_dec(subdir);
5113 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5117 const line_t oldline = CopLINE(PL_curcop);
5123 while (av_len(paramList) >= 0) {
5124 cv = (CV*)av_shift(paramList);
5126 if (paramList == PL_beginav) {
5127 /* save PL_beginav for compiler */
5128 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5130 else if (paramList == PL_checkav) {
5131 /* save PL_checkav for compiler */
5132 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5134 else if (paramList == PL_unitcheckav) {
5135 /* save PL_unitcheckav for compiler */
5136 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5147 PL_madskills |= 16384;
5152 PL_madskills &= ~16384;
5155 (void)SvPV_const(atsv, len);
5156 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5157 break; /* not really trying to run, so just wing it */
5159 PL_curcop = &PL_compiling;
5160 CopLINE_set(PL_curcop, oldline);
5161 if (paramList == PL_beginav)
5162 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5164 Perl_sv_catpvf(aTHX_ atsv,
5165 "%s failed--call queue aborted",
5166 paramList == PL_checkav ? "CHECK"
5167 : paramList == PL_initav ? "INIT"
5168 : paramList == PL_unitcheckav ? "UNITCHECK"
5170 while (PL_scopestack_ix > oldscope)
5173 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5180 /* my_exit() was called */
5181 while (PL_scopestack_ix > oldscope)
5184 PL_curstash = PL_defstash;
5185 PL_curcop = &PL_compiling;
5186 CopLINE_set(PL_curcop, oldline);
5188 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5189 return; /* not really trying to run, so just wing it */
5190 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5191 if (paramList == PL_beginav)
5192 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5194 Perl_croak(aTHX_ "%s failed--call queue aborted",
5195 paramList == PL_checkav ? "CHECK"
5196 : paramList == PL_initav ? "INIT"
5197 : paramList == PL_unitcheckav ? "UNITCHECK"
5204 PL_curcop = &PL_compiling;
5205 CopLINE_set(PL_curcop, oldline);
5208 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5217 Perl_my_exit(pTHX_ U32 status)
5220 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5221 (void*)thr, (unsigned long) status));
5230 STATUS_EXIT_SET(status);
5237 Perl_my_failure_exit(pTHX)
5241 /* We have been called to fall on our sword. The desired exit code
5242 * should be already set in STATUS_UNIX, but could be shifted over
5243 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5246 * If an error code has not been set, then force the issue.
5248 if (MY_POSIX_EXIT) {
5250 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5251 * the exit code when there isn't an error.
5254 if (STATUS_UNIX == 0)
5255 STATUS_UNIX_EXIT_SET(255);
5257 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5259 /* The exit code could have been set by $? or vmsish which
5260 * means that it may not be fatal. So convert
5261 * success/warning codes to fatal.
5263 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5264 STATUS_UNIX_EXIT_SET(255);
5268 /* Traditionally Perl on VMS always expects a Fatal Error. */
5269 if (vaxc$errno & 1) {
5271 /* So force success status to failure */
5272 if (STATUS_NATIVE & 1)
5277 STATUS_UNIX = EINTR; /* In case something cares */
5282 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5284 /* Encode the severity code */
5285 severity = STATUS_NATIVE & STS$M_SEVERITY;
5286 STATUS_UNIX = (severity ? severity : 1) << 8;
5288 /* Perl expects this to be a fatal error */
5289 if (severity != STS$K_SEVERE)
5298 STATUS_UNIX_SET(errno);
5300 exitstatus = STATUS_UNIX >> 8;
5301 if (exitstatus & 255)
5302 STATUS_UNIX_SET(exitstatus);
5304 STATUS_UNIX_SET(255);
5311 S_my_exit_jump(pTHX)
5316 SvREFCNT_dec(PL_e_script);
5320 POPSTACK_TO(PL_mainstack);
5328 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5331 const char * const p = SvPVX_const(PL_e_script);
5332 const char *nl = strchr(p, '\n');
5334 PERL_UNUSED_ARG(idx);
5335 PERL_UNUSED_ARG(maxlen);
5337 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5339 filter_del(read_e_script);
5342 sv_catpvn(buf_sv, p, nl-p);
5343 sv_chop(PL_e_script, nl);
5349 * c-indentation-style: bsd
5351 * indent-tabs-mode: t
5354 * ex: set ts=8 sts=4 sw=4 noet: