3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
175 PERL_SET_THX(my_perl);
179 #ifdef PERL_IMPLICIT_SYS
181 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
182 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
183 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
184 struct IPerlDir* ipD, struct IPerlSock* ipS,
185 struct IPerlProc* ipP)
187 PerlInterpreter *my_perl;
188 /* Newx() needs interpreter, so call malloc() instead */
189 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
190 S_init_tls_and_interp(my_perl);
191 Zero(my_perl, 1, PerlInterpreter);
201 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 =head1 Embedding Functions
210 =for apidoc perl_alloc
212 Allocates a new Perl interpreter. See L<perlembed>.
220 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 S_init_tls_and_interp(my_perl);
226 #ifndef PERL_TRACK_MEMPOOL
227 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
229 Zero(my_perl, 1, PerlInterpreter);
230 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
234 #endif /* PERL_IMPLICIT_SYS */
237 =for apidoc perl_construct
239 Initializes a new Perl interpreter. See L<perlembed>.
245 perl_construct(pTHXx)
248 PERL_UNUSED_ARG(my_perl);
251 PL_perl_destruct_level = 1;
253 if (PL_perl_destruct_level > 0)
256 /* Init the real globals (and main thread)? */
258 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
260 PL_linestr = newSV(79);
261 sv_upgrade(PL_linestr,SVt_PVIV);
263 if (!SvREADONLY(&PL_sv_undef)) {
264 /* set read-only and try to insure than we wont see REFCNT==0
267 SvREADONLY_on(&PL_sv_undef);
268 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
270 sv_setpv(&PL_sv_no,PL_No);
271 /* value lookup in void context - happens to have the side effect
272 of caching the numeric forms. */
275 SvREADONLY_on(&PL_sv_no);
276 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
278 sv_setpv(&PL_sv_yes,PL_Yes);
281 SvREADONLY_on(&PL_sv_yes);
282 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
284 SvREADONLY_on(&PL_sv_placeholder);
285 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
288 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
289 #ifdef PERL_USES_PL_PIDSTATUS
290 PL_pidstatus = newHV();
294 PL_rs = newSVpvs("\n");
299 PL_lex_state = LEX_NOTPARSING;
305 SET_NUMERIC_STANDARD();
307 #if defined(LOCAL_PATCH_COUNT)
308 PL_localpatches = local_patches; /* For possible -v */
311 #ifdef HAVE_INTERP_INTERN
315 PerlIO_init(aTHX); /* Hook to IO system */
317 PL_fdpid = newAV(); /* for remembering popen pids by fd */
318 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
319 PL_errors = newSVpvs("");
320 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
321 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
322 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
324 PL_regex_padav = newAV();
325 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
326 PL_regex_pad = AvARRAY(PL_regex_padav);
328 #ifdef USE_REENTRANT_API
329 Perl_reentrant_init(aTHX);
332 /* Note that strtab is a rather special HV. Assumptions are made
333 about not iterating on it, and not adding tie magic to it.
334 It is properly deallocated in perl_destruct() */
337 HvSHAREKEYS_off(PL_strtab); /* mandatory */
338 hv_ksplit(PL_strtab, 512);
340 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
341 _dyld_lookup_and_bind
342 ("__environ", (unsigned long *) &environ_pointer, NULL);
346 # ifdef USE_ENVIRON_ARRAY
347 PL_origenviron = environ;
351 /* Use sysconf(_SC_CLK_TCK) if available, if not
352 * available or if the sysconf() fails, use the HZ.
353 * BeOS has those, but returns the wrong value.
354 * The HZ if not originally defined has been by now
355 * been defined as CLK_TCK, if available. */
356 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
357 PL_clocktick = sysconf(_SC_CLK_TCK);
358 if (PL_clocktick <= 0)
362 PL_stashcache = newHV();
364 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
365 (int)PERL_VERSION, (int)PERL_SUBVERSION);
368 if (!PL_mmap_page_size) {
369 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
371 SETERRNO(0, SS_NORMAL);
373 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
375 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
377 if ((long) PL_mmap_page_size < 0) {
379 SV * const error = ERRSV;
380 SvUPGRADE(error, SVt_PV);
381 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
384 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
388 # ifdef HAS_GETPAGESIZE
389 PL_mmap_page_size = getpagesize();
391 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
392 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
396 if (PL_mmap_page_size <= 0)
397 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
398 (IV) PL_mmap_page_size);
400 #endif /* HAS_MMAP */
402 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
403 PL_timesbase.tms_utime = 0;
404 PL_timesbase.tms_stime = 0;
405 PL_timesbase.tms_cutime = 0;
406 PL_timesbase.tms_cstime = 0;
417 =for apidoc nothreadhook
419 Stub that provides thread hook for perl_destruct when there are
426 Perl_nothreadhook(pTHX)
432 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
434 Perl_dump_sv_child(pTHX_ SV *sv)
437 const int sock = PL_dumper_fd;
438 const int debug_fd = PerlIO_fileno(Perl_debug_log);
439 union control_un control;
442 struct cmsghdr *cmptr;
444 unsigned char buffer[256];
446 if(sock == -1 || debug_fd == -1)
449 PerlIO_flush(Perl_debug_log);
451 /* All these shenanigans are to pass a file descriptor over to our child for
452 it to dump out to. We can't let it hold open the file descriptor when it
453 forks, as the file descriptor it will dump to can turn out to be one end
454 of pipe that some other process will wait on for EOF. (So as it would
455 be open, the wait would be forever.) */
457 msg.msg_control = control.control;
458 msg.msg_controllen = sizeof(control.control);
459 /* We're a connected socket so we don't need a destination */
465 cmptr = CMSG_FIRSTHDR(&msg);
466 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
467 cmptr->cmsg_level = SOL_SOCKET;
468 cmptr->cmsg_type = SCM_RIGHTS;
469 *((int *)CMSG_DATA(cmptr)) = 1;
471 vec[0].iov_base = (void*)&sv;
472 vec[0].iov_len = sizeof(sv);
473 got = sendmsg(sock, &msg, 0);
476 perror("Debug leaking scalars parent sendmsg failed");
479 if(got < sizeof(sv)) {
480 perror("Debug leaking scalars parent short sendmsg");
484 /* Return protocol is
486 unsigned char: length of location string (0 for empty)
487 unsigned char*: string (not terminated)
489 vec[0].iov_base = (void*)&returned_errno;
490 vec[0].iov_len = sizeof(returned_errno);
491 vec[1].iov_base = buffer;
494 got = readv(sock, vec, 2);
497 perror("Debug leaking scalars parent read failed");
498 PerlIO_flush(PerlIO_stderr());
501 if(got < sizeof(returned_errno) + 1) {
502 perror("Debug leaking scalars parent short read");
503 PerlIO_flush(PerlIO_stderr());
508 got = read(sock, buffer + 1, *buffer);
510 perror("Debug leaking scalars parent read 2 failed");
511 PerlIO_flush(PerlIO_stderr());
516 perror("Debug leaking scalars parent short read 2");
517 PerlIO_flush(PerlIO_stderr());
522 if (returned_errno || *buffer) {
523 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
524 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
525 returned_errno, strerror(returned_errno));
531 =for apidoc perl_destruct
533 Shuts down a Perl interpreter. See L<perlembed>.
542 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
544 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
548 PERL_UNUSED_ARG(my_perl);
550 /* wait for all pseudo-forked children to finish */
551 PERL_WAIT_FOR_CHILDREN;
553 destruct_level = PL_perl_destruct_level;
556 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
558 const int i = atoi(s);
559 if (destruct_level < i)
565 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
571 if (PL_endav && !PL_minus_c)
572 call_list(PL_scopestack_ix, PL_endav);
578 /* Need to flush since END blocks can produce output */
581 if (CALL_FPTR(PL_threadhook)(aTHX)) {
582 /* Threads hook has vetoed further cleanup */
586 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
587 if (destruct_level != 0) {
588 /* Fork here to create a child. Our child's job is to preserve the
589 state of scalars prior to destruction, so that we can instruct it
590 to dump any scalars that we later find have leaked.
591 There's no subtlety in this code - it assumes POSIX, and it doesn't
595 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
596 perror("Debug leaking scalars socketpair failed");
602 perror("Debug leaking scalars fork failed");
606 /* We are the child */
607 const int sock = fd[1];
608 const int debug_fd = PerlIO_fileno(Perl_debug_log);
611 /* Our success message is an integer 0, and a char 0 */
612 static const char success[sizeof(int) + 1];
616 /* We need to close all other file descriptors otherwise we end up
617 with interesting hangs, where the parent closes its end of a
618 pipe, and sits waiting for (another) child to terminate. Only
619 that child never terminates, because it never gets EOF, because
620 we also have the far end of the pipe open. We even need to
621 close the debugging fd, because sometimes it happens to be one
622 end of a pipe, and a process is waiting on the other end for
623 EOF. Normally it would be closed at some point earlier in
624 destruction, but if we happen to cause the pipe to remain open,
625 EOF never occurs, and we get an infinite hang. Hence all the
626 games to pass in a file descriptor if it's actually needed. */
628 f = sysconf(_SC_OPEN_MAX);
630 where = "sysconf failed";
641 union control_un control;
644 struct cmsghdr *cmptr;
648 msg.msg_control = control.control;
649 msg.msg_controllen = sizeof(control.control);
650 /* We're a connected socket so we don't need a source */
654 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
656 vec[0].iov_base = (void*)⌖
657 vec[0].iov_len = sizeof(target);
659 got = recvmsg(sock, &msg, 0);
664 where = "recv failed";
667 if(got < sizeof(target)) {
668 where = "short recv";
672 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
676 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
677 where = "wrong cmsg_len";
680 if(cmptr->cmsg_level != SOL_SOCKET) {
681 where = "wrong cmsg_level";
684 if(cmptr->cmsg_type != SCM_RIGHTS) {
685 where = "wrong cmsg_type";
689 got_fd = *(int*)CMSG_DATA(cmptr);
690 /* For our last little bit of trickery, put the file descriptor
691 back into Perl_debug_log, as if we never actually closed it
693 if(got_fd != debug_fd) {
694 if (dup2(got_fd, debug_fd) == -1) {
701 PerlIO_flush(Perl_debug_log);
703 got = write(sock, &success, sizeof(success));
706 where = "write failed";
709 if(got < sizeof(success)) {
710 where = "short write";
717 int send_errno = errno;
718 unsigned char length = (unsigned char) strlen(where);
719 struct iovec failure[3] = {
720 {(void*)&send_errno, sizeof(send_errno)},
722 {(void*)where, length}
724 int got = writev(sock, failure, 3);
725 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
726 in the parent if we try to read from the socketpair after the
727 child has exited, even if there was data to read.
728 So sleep a bit to give the parent a fighting chance of
731 _exit((got == -1) ? errno : 0);
735 PL_dumper_fd = fd[0];
740 /* We must account for everything. */
742 /* Destroy the main CV and syntax tree */
743 /* Do this now, because destroying ops can cause new SVs to be generated
744 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
745 PL_curcop to point to a valid op from which the filename structure
747 PL_curcop = &PL_compiling;
749 /* ensure comppad/curpad to refer to main's pad */
750 if (CvPADLIST(PL_main_cv)) {
751 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
753 op_free(PL_main_root);
756 PL_main_start = NULL;
757 SvREFCNT_dec(PL_main_cv);
761 /* Tell PerlIO we are about to tear things apart in case
762 we have layers which are using resources that should
766 PerlIO_destruct(aTHX);
768 if (PL_sv_objcount) {
770 * Try to destruct global references. We do this first so that the
771 * destructors and destructees still exist. Some sv's might remain.
772 * Non-referenced objects are on their own.
776 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
777 PL_defoutgv = NULL; /* may have been freed */
780 /* unhook hooks which will soon be, or use, destroyed data */
781 SvREFCNT_dec(PL_warnhook);
783 SvREFCNT_dec(PL_diehook);
786 /* call exit list functions */
787 while (PL_exitlistlen-- > 0)
788 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
790 Safefree(PL_exitlist);
795 /* jettison our possibly duplicated environment */
796 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
797 * so we certainly shouldn't free it here
800 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
801 if (environ != PL_origenviron && !PL_use_safe_putenv
803 /* only main thread can free environ[0] contents */
804 && PL_curinterp == aTHX
810 for (i = 0; environ[i]; i++)
811 safesysfree(environ[i]);
813 /* Must use safesysfree() when working with environ. */
814 safesysfree(environ);
816 environ = PL_origenviron;
819 #endif /* !PERL_MICRO */
821 if (destruct_level == 0) {
823 DEBUG_P(debprofdump());
825 #if defined(PERLIO_LAYERS)
826 /* No more IO - including error messages ! */
827 PerlIO_cleanup(aTHX);
830 CopFILE_free(&PL_compiling);
831 CopSTASH_free(&PL_compiling);
833 /* The exit() function will do everything that needs doing. */
837 /* reset so print() ends up where we expect */
841 /* the syntax tree is shared between clones
842 * so op_free(PL_main_root) only ReREFCNT_dec's
843 * REGEXPs in the parent interpreter
844 * we need to manually ReREFCNT_dec for the clones
847 I32 i = AvFILLp(PL_regex_padav) + 1;
848 SV * const * const ary = AvARRAY(PL_regex_padav);
851 SV * const resv = ary[--i];
853 if (SvFLAGS(resv) & SVf_BREAK) {
854 /* this is PL_reg_curpm, already freed
855 * flag is set in regexec.c:S_regtry
857 SvFLAGS(resv) &= ~SVf_BREAK;
859 else if(SvREPADTMP(resv)) {
860 SvREPADTMP_off(resv);
862 else if(SvIOKp(resv)) {
863 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
868 SvREFCNT_dec(PL_regex_padav);
869 PL_regex_padav = NULL;
873 SvREFCNT_dec((SV*) PL_stashcache);
874 PL_stashcache = NULL;
876 /* loosen bonds of global variables */
879 (void)PerlIO_close(PL_rsfp);
883 /* Filters for program text */
884 SvREFCNT_dec(PL_rsfp_filters);
885 PL_rsfp_filters = NULL;
888 Safefree(PL_splitstr);
893 PL_preprocess = FALSE;
899 PL_doswitches = FALSE;
900 PL_dowarn = G_WARN_OFF;
901 PL_doextract = FALSE;
902 PL_sawampersand = FALSE; /* must save all match strings */
905 Safefree(PL_inplace);
907 SvREFCNT_dec(PL_patchlevel);
910 SvREFCNT_dec(PL_e_script);
916 /* magical thingies */
918 SvREFCNT_dec(PL_ofs_sv); /* $, */
921 SvREFCNT_dec(PL_ors_sv); /* $\ */
924 SvREFCNT_dec(PL_rs); /* $/ */
927 Safefree(PL_osname); /* $^O */
930 SvREFCNT_dec(PL_statname);
934 /* defgv, aka *_ should be taken care of elsewhere */
936 /* clean up after study() */
937 SvREFCNT_dec(PL_lastscream);
938 PL_lastscream = NULL;
939 Safefree(PL_screamfirst);
941 Safefree(PL_screamnext);
945 Safefree(PL_efloatbuf);
949 /* startup and shutdown function lists */
950 SvREFCNT_dec(PL_beginav);
951 SvREFCNT_dec(PL_beginav_save);
952 SvREFCNT_dec(PL_endav);
953 SvREFCNT_dec(PL_checkav);
954 SvREFCNT_dec(PL_checkav_save);
955 SvREFCNT_dec(PL_unitcheckav);
956 SvREFCNT_dec(PL_unitcheckav_save);
957 SvREFCNT_dec(PL_initav);
959 PL_beginav_save = NULL;
962 PL_checkav_save = NULL;
963 PL_unitcheckav = NULL;
964 PL_unitcheckav_save = NULL;
967 /* shortcuts just get cleared */
976 PL_last_in_gv = NULL;
984 PL_DBassertion = NULL;
989 SvREFCNT_dec(PL_argvout_stack);
990 PL_argvout_stack = NULL;
992 SvREFCNT_dec(PL_modglobal);
994 SvREFCNT_dec(PL_preambleav);
995 PL_preambleav = NULL;
996 SvREFCNT_dec(PL_subname);
998 SvREFCNT_dec(PL_linestr);
1000 #ifdef PERL_USES_PL_PIDSTATUS
1001 SvREFCNT_dec(PL_pidstatus);
1002 PL_pidstatus = NULL;
1004 SvREFCNT_dec(PL_toptarget);
1005 PL_toptarget = NULL;
1006 SvREFCNT_dec(PL_bodytarget);
1007 PL_bodytarget = NULL;
1008 PL_formtarget = NULL;
1010 /* free locale stuff */
1011 #ifdef USE_LOCALE_COLLATE
1012 Safefree(PL_collation_name);
1013 PL_collation_name = NULL;
1016 #ifdef USE_LOCALE_NUMERIC
1017 Safefree(PL_numeric_name);
1018 PL_numeric_name = NULL;
1019 SvREFCNT_dec(PL_numeric_radix_sv);
1020 PL_numeric_radix_sv = NULL;
1023 /* clear utf8 character classes */
1024 SvREFCNT_dec(PL_utf8_alnum);
1025 SvREFCNT_dec(PL_utf8_alnumc);
1026 SvREFCNT_dec(PL_utf8_ascii);
1027 SvREFCNT_dec(PL_utf8_alpha);
1028 SvREFCNT_dec(PL_utf8_space);
1029 SvREFCNT_dec(PL_utf8_cntrl);
1030 SvREFCNT_dec(PL_utf8_graph);
1031 SvREFCNT_dec(PL_utf8_digit);
1032 SvREFCNT_dec(PL_utf8_upper);
1033 SvREFCNT_dec(PL_utf8_lower);
1034 SvREFCNT_dec(PL_utf8_print);
1035 SvREFCNT_dec(PL_utf8_punct);
1036 SvREFCNT_dec(PL_utf8_xdigit);
1037 SvREFCNT_dec(PL_utf8_mark);
1038 SvREFCNT_dec(PL_utf8_toupper);
1039 SvREFCNT_dec(PL_utf8_totitle);
1040 SvREFCNT_dec(PL_utf8_tolower);
1041 SvREFCNT_dec(PL_utf8_tofold);
1042 SvREFCNT_dec(PL_utf8_idstart);
1043 SvREFCNT_dec(PL_utf8_idcont);
1044 PL_utf8_alnum = NULL;
1045 PL_utf8_alnumc = NULL;
1046 PL_utf8_ascii = NULL;
1047 PL_utf8_alpha = NULL;
1048 PL_utf8_space = NULL;
1049 PL_utf8_cntrl = NULL;
1050 PL_utf8_graph = NULL;
1051 PL_utf8_digit = NULL;
1052 PL_utf8_upper = NULL;
1053 PL_utf8_lower = NULL;
1054 PL_utf8_print = NULL;
1055 PL_utf8_punct = NULL;
1056 PL_utf8_xdigit = NULL;
1057 PL_utf8_mark = NULL;
1058 PL_utf8_toupper = NULL;
1059 PL_utf8_totitle = NULL;
1060 PL_utf8_tolower = NULL;
1061 PL_utf8_tofold = NULL;
1062 PL_utf8_idstart = NULL;
1063 PL_utf8_idcont = NULL;
1065 if (!specialWARN(PL_compiling.cop_warnings))
1066 PerlMemShared_free(PL_compiling.cop_warnings);
1067 PL_compiling.cop_warnings = NULL;
1068 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1069 PL_compiling.cop_hints_hash = NULL;
1070 CopFILE_free(&PL_compiling);
1071 CopSTASH_free(&PL_compiling);
1073 /* Prepare to destruct main symbol table. */
1078 SvREFCNT_dec(PL_curstname);
1079 PL_curstname = NULL;
1081 /* clear queued errors */
1082 SvREFCNT_dec(PL_errors);
1086 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1087 if (PL_scopestack_ix != 0)
1088 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1089 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1090 (long)PL_scopestack_ix);
1091 if (PL_savestack_ix != 0)
1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1093 "Unbalanced saves: %ld more saves than restores\n",
1094 (long)PL_savestack_ix);
1095 if (PL_tmps_floor != -1)
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1097 (long)PL_tmps_floor + 1);
1098 if (cxstack_ix != -1)
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1100 (long)cxstack_ix + 1);
1103 /* Now absolutely destruct everything, somehow or other, loops or no. */
1104 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1105 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1107 /* the 2 is for PL_fdpid and PL_strtab */
1108 while (PL_sv_count > 2 && sv_clean_all())
1111 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1112 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1113 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1114 SvFLAGS(PL_strtab) |= SVt_PVHV;
1116 AvREAL_off(PL_fdpid); /* no surviving entries */
1117 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1120 #ifdef HAVE_INTERP_INTERN
1124 /* Destruct the global string table. */
1126 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1127 * so that sv_free() won't fail on them.
1128 * Now that the global string table is using a single hunk of memory
1129 * for both HE and HEK, we either need to explicitly unshare it the
1130 * correct way, or actually free things here.
1133 const I32 max = HvMAX(PL_strtab);
1134 HE * const * const array = HvARRAY(PL_strtab);
1135 HE *hent = array[0];
1138 if (hent && ckWARN_d(WARN_INTERNAL)) {
1139 HE * const next = HeNEXT(hent);
1140 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1141 "Unbalanced string table refcount: (%ld) for \"%s\"",
1142 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1149 hent = array[riter];
1154 HvARRAY(PL_strtab) = 0;
1155 HvTOTALKEYS(PL_strtab) = 0;
1156 HvFILL(PL_strtab) = 0;
1158 SvREFCNT_dec(PL_strtab);
1161 /* free the pointer tables used for cloning */
1162 ptr_table_free(PL_ptr_table);
1163 PL_ptr_table = (PTR_TBL_t*)NULL;
1166 /* free special SVs */
1168 SvREFCNT(&PL_sv_yes) = 0;
1169 sv_clear(&PL_sv_yes);
1170 SvANY(&PL_sv_yes) = NULL;
1171 SvFLAGS(&PL_sv_yes) = 0;
1173 SvREFCNT(&PL_sv_no) = 0;
1174 sv_clear(&PL_sv_no);
1175 SvANY(&PL_sv_no) = NULL;
1176 SvFLAGS(&PL_sv_no) = 0;
1180 for (i=0; i<=2; i++) {
1181 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1182 sv_clear(PERL_DEBUG_PAD(i));
1183 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1184 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1188 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1189 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1191 #ifdef DEBUG_LEAKING_SCALARS
1192 if (PL_sv_count != 0) {
1197 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1198 svend = &sva[SvREFCNT(sva)];
1199 for (sv = sva + 1; sv < svend; ++sv) {
1200 if (SvTYPE(sv) != SVTYPEMASK) {
1201 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1203 " refcnt=%"UVuf pTHX__FORMAT "\n"
1204 "\tallocated at %s:%d %s %s%s\n",
1205 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1206 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1208 sv->sv_debug_inpad ? "for" : "by",
1209 sv->sv_debug_optype ?
1210 PL_op_name[sv->sv_debug_optype]: "(none)",
1211 sv->sv_debug_cloned ? " (cloned)" : ""
1213 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1214 Perl_dump_sv_child(aTHX_ sv);
1220 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1224 /* Wait for up to 4 seconds for child to terminate.
1225 This seems to be the least effort way of timing out on reaping
1227 struct timeval waitfor = {4, 0};
1228 int sock = PL_dumper_fd;
1232 FD_SET(sock, &rset);
1233 select(sock + 1, &rset, NULL, NULL, &waitfor);
1234 waitpid(child, &status, WNOHANG);
1242 #if defined(PERLIO_LAYERS)
1243 /* No more IO - including error messages ! */
1244 PerlIO_cleanup(aTHX);
1247 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1248 as currently layers use it rather than NULL as a marker
1249 for no arg - and will try and SvREFCNT_dec it.
1251 SvREFCNT(&PL_sv_undef) = 0;
1252 SvREADONLY_off(&PL_sv_undef);
1254 Safefree(PL_origfilename);
1255 PL_origfilename = NULL;
1256 Safefree(PL_reg_start_tmp);
1257 PL_reg_start_tmp = (char**)NULL;
1258 PL_reg_start_tmpl = 0;
1259 Safefree(PL_reg_curpm);
1260 Safefree(PL_reg_poscache);
1261 free_tied_hv_pool();
1262 Safefree(PL_op_mask);
1263 Safefree(PL_psig_ptr);
1264 PL_psig_ptr = (SV**)NULL;
1265 Safefree(PL_psig_name);
1266 PL_psig_name = (SV**)NULL;
1267 Safefree(PL_bitcount);
1269 Safefree(PL_psig_pend);
1270 PL_psig_pend = (int*)NULL;
1273 PL_tainting = FALSE;
1274 PL_taint_warn = FALSE;
1275 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1278 DEBUG_P(debprofdump());
1280 #ifdef USE_REENTRANT_API
1281 Perl_reentrant_free(aTHX);
1286 while (PL_regmatch_slab) {
1287 regmatch_slab *s = PL_regmatch_slab;
1288 PL_regmatch_slab = PL_regmatch_slab->next;
1292 /* As the absolutely last thing, free the non-arena SV for mess() */
1295 /* we know that type == SVt_PVMG */
1297 /* it could have accumulated taint magic */
1300 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1301 moremagic = mg->mg_moremagic;
1302 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1304 Safefree(mg->mg_ptr);
1308 /* we know that type >= SVt_PV */
1309 SvPV_free(PL_mess_sv);
1310 Safefree(SvANY(PL_mess_sv));
1311 Safefree(PL_mess_sv);
1318 =for apidoc perl_free
1320 Releases a Perl interpreter. See L<perlembed>.
1328 #ifdef PERL_TRACK_MEMPOOL
1331 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1332 * value as we're probably hunting memory leaks then
1334 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1335 if (!s || atoi(s) == 0) {
1336 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1337 thread at thread exit. */
1338 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1339 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1344 #if defined(WIN32) || defined(NETWARE)
1345 # if defined(PERL_IMPLICIT_SYS)
1348 void *host = nw_internal_host;
1350 void *host = w32_internal_host;
1352 PerlMem_free(aTHXx);
1354 nw_delete_internal_host(host);
1356 win32_delete_internal_host(host);
1360 PerlMem_free(aTHXx);
1363 PerlMem_free(aTHXx);
1367 #if defined(USE_ITHREADS)
1368 /* provide destructors to clean up the thread key when libperl is unloaded */
1369 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1371 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1372 #pragma fini "perl_fini"
1373 #elif defined(__sun) && !defined(__GNUC__)
1374 #pragma fini (perl_fini)
1378 #if defined(__GNUC__)
1379 __attribute__((destructor))
1389 #endif /* THREADS */
1392 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1395 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1396 PL_exitlist[PL_exitlistlen].fn = fn;
1397 PL_exitlist[PL_exitlistlen].ptr = ptr;
1401 #ifdef HAS_PROCSELFEXE
1402 /* This is a function so that we don't hold on to MAXPATHLEN
1403 bytes of stack longer than necessary
1406 S_procself_val(pTHX_ SV *sv, const char *arg0)
1408 char buf[MAXPATHLEN];
1409 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1411 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1412 includes a spurious NUL which will cause $^X to fail in system
1413 or backticks (this will prevent extensions from being built and
1414 many tests from working). readlink is not meant to add a NUL.
1415 Normal readlink works fine.
1417 if (len > 0 && buf[len-1] == '\0') {
1421 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1422 returning the text "unknown" from the readlink rather than the path
1423 to the executable (or returning an error from the readlink). Any valid
1424 path has a '/' in it somewhere, so use that to validate the result.
1425 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1427 if (len > 0 && memchr(buf, '/', len)) {
1428 sv_setpvn(sv,buf,len);
1434 #endif /* HAS_PROCSELFEXE */
1437 S_set_caret_X(pTHX) {
1439 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1441 #ifdef HAS_PROCSELFEXE
1442 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1445 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1447 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1454 =for apidoc perl_parse
1456 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1462 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1469 PERL_UNUSED_ARG(my_perl);
1471 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1474 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1475 setuid perl scripts securely.\n");
1476 #endif /* IAMSUID */
1479 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1480 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1481 * This MUST be done before any hash stores or fetches take place.
1482 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1483 * yourself, it is your responsibility to provide a good random seed!
1484 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1485 if (!PL_rehash_seed_set)
1486 PL_rehash_seed = get_hash_seed();
1488 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1490 if (s && (atoi(s) == 1))
1491 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1493 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1498 if (PL_origalen != 0) {
1499 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1502 /* Set PL_origalen be the sum of the contiguous argv[]
1503 * elements plus the size of the env in case that it is
1504 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1505 * as the maximum modifiable length of $0. In the worst case
1506 * the area we are able to modify is limited to the size of
1507 * the original argv[0]. (See below for 'contiguous', though.)
1509 const char *s = NULL;
1512 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1513 /* Do the mask check only if the args seem like aligned. */
1515 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1517 /* See if all the arguments are contiguous in memory. Note
1518 * that 'contiguous' is a loose term because some platforms
1519 * align the argv[] and the envp[]. If the arguments look
1520 * like non-aligned, assume that they are 'strictly' or
1521 * 'traditionally' contiguous. If the arguments look like
1522 * aligned, we just check that they are within aligned
1523 * PTRSIZE bytes. As long as no system has something bizarre
1524 * like the argv[] interleaved with some other data, we are
1525 * fine. (Did I just evoke Murphy's Law?) --jhi */
1526 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1528 for (i = 1; i < PL_origargc; i++) {
1529 if ((PL_origargv[i] == s + 1
1531 || PL_origargv[i] == s + 2
1536 (PL_origargv[i] > s &&
1538 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1548 /* Can we grab env area too to be used as the area for $0? */
1549 if (s && PL_origenviron) {
1550 if ((PL_origenviron[0] == s + 1)
1553 (PL_origenviron[0] > s &&
1554 PL_origenviron[0] <=
1555 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1558 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1559 s = PL_origenviron[0];
1562 my_setenv("NoNe SuCh", NULL);
1563 /* Force copy of environment. */
1564 for (i = 1; PL_origenviron[i]; i++) {
1565 if (PL_origenviron[i] == s + 1
1568 (PL_origenviron[i] > s &&
1569 PL_origenviron[i] <=
1570 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1573 s = PL_origenviron[i];
1581 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1586 /* Come here if running an undumped a.out. */
1588 PL_origfilename = savepv(argv[0]);
1589 PL_do_undump = FALSE;
1590 cxstack_ix = -1; /* start label stack again */
1592 assert (!PL_tainted);
1594 S_set_caret_X(aTHX);
1596 init_postdump_symbols(argc,argv,env);
1601 op_free(PL_main_root);
1602 PL_main_root = NULL;
1604 PL_main_start = NULL;
1605 SvREFCNT_dec(PL_main_cv);
1609 oldscope = PL_scopestack_ix;
1610 PL_dowarn = G_WARN_OFF;
1615 parse_body(env,xsinit);
1617 call_list(oldscope, PL_unitcheckav);
1619 call_list(oldscope, PL_checkav);
1626 /* my_exit() was called */
1627 while (PL_scopestack_ix > oldscope)
1630 PL_curstash = PL_defstash;
1632 call_list(oldscope, PL_unitcheckav);
1634 call_list(oldscope, PL_checkav);
1638 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1647 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1650 int argc = PL_origargc;
1651 char **argv = PL_origargv;
1652 const char *scriptname = NULL;
1653 VOL bool dosearch = FALSE;
1654 const char *validarg = "";
1656 register char *s, c;
1657 const char *cddir = NULL;
1658 #ifdef USE_SITECUSTOMIZE
1659 bool minus_f = FALSE;
1662 sv_setpvn(PL_linestr,"",0);
1663 sv = newSVpvs(""); /* first used for -I flags */
1667 for (argc--,argv++; argc > 0; argc--,argv++) {
1668 if (argv[0][0] != '-' || !argv[0][1])
1672 validarg = " PHOOEY ";
1676 * Can we rely on the kernel to start scripts with argv[1] set to
1677 * contain all #! line switches (the whole line)? (argv[0] is set to
1678 * the interpreter name, argv[2] to the script name; argv[3] and
1679 * above may contain other arguments.)
1686 #ifndef PERL_STRICT_CR
1711 if ((s = moreswitches(s)))
1716 CHECK_MALLOC_TOO_LATE_FOR('t');
1717 if( !PL_tainting ) {
1718 PL_taint_warn = TRUE;
1724 CHECK_MALLOC_TOO_LATE_FOR('T');
1726 PL_taint_warn = FALSE;
1734 #ifdef MACOS_TRADITIONAL
1735 /* ignore -e for Dev:Pseudo argument */
1736 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1739 forbid_setid('e', -1);
1741 PL_e_script = newSVpvs("");
1742 filter_add(read_e_script, NULL);
1745 sv_catpv(PL_e_script, s);
1747 sv_catpv(PL_e_script, argv[1]);
1751 Perl_croak(aTHX_ "No code specified for -%c", c);
1752 sv_catpvs(PL_e_script, "\n");
1756 #ifdef USE_SITECUSTOMIZE
1762 case 'I': /* -I handled both here and in moreswitches() */
1763 forbid_setid('I', -1);
1764 if (!*++s && (s=argv[1]) != NULL) {
1768 STRLEN len = strlen(s);
1769 const char * const p = savepvn(s, len);
1770 incpush(p, TRUE, TRUE, FALSE, FALSE);
1771 sv_catpvs(sv, "-I");
1772 sv_catpvn(sv, p, len);
1777 Perl_croak(aTHX_ "No directory specified for -I");
1780 forbid_setid('P', -1);
1781 PL_preprocess = TRUE;
1785 forbid_setid('S', -1);
1794 PL_preambleav = newAV();
1795 av_push(PL_preambleav,
1796 newSVpvs("use Config;"));
1800 opts_prog = newSVpvs("print Config::myconfig(),");
1802 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1804 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1806 opts = SvCUR(opts_prog);
1808 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1812 # ifdef DEBUG_LEAKING_SCALARS
1813 " DEBUG_LEAKING_SCALARS"
1815 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1816 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1818 # ifdef FAKE_THREADS
1821 # ifdef MULTIPLICITY
1830 # ifdef PERL_DONT_CREATE_GVSV
1831 " PERL_DONT_CREATE_GVSV"
1833 # ifdef PERL_GLOBAL_STRUCT
1834 " PERL_GLOBAL_STRUCT"
1836 # ifdef PERL_IMPLICIT_CONTEXT
1837 " PERL_IMPLICIT_CONTEXT"
1839 # ifdef PERL_IMPLICIT_SYS
1840 " PERL_IMPLICIT_SYS"
1845 # ifdef PERL_MALLOC_WRAP
1848 # ifdef PERL_NEED_APPCTX
1851 # ifdef PERL_NEED_TIMESBASE
1852 " PERL_NEED_TIMESBASE"
1854 # ifdef PERL_OLD_COPY_ON_WRITE
1855 " PERL_OLD_COPY_ON_WRITE"
1857 # ifdef PERL_TRACK_MEMPOOL
1858 " PERL_TRACK_MEMPOOL"
1860 # ifdef PERL_USE_SAFE_PUTENV
1861 " PERL_USE_SAFE_PUTENV"
1863 #ifdef PERL_USES_PL_PIDSTATUS
1864 " PERL_USES_PL_PIDSTATUS"
1866 # ifdef PL_OP_SLAB_ALLOC
1869 # ifdef THREADS_HAVE_PIDS
1870 " THREADS_HAVE_PIDS"
1872 # ifdef USE_64_BIT_ALL
1875 # ifdef USE_64_BIT_INT
1878 # ifdef USE_ITHREADS
1881 # ifdef USE_LARGE_FILES
1884 # ifdef USE_LONG_DOUBLE
1890 # ifdef USE_REENTRANT_API
1891 " USE_REENTRANT_API"
1896 # ifdef USE_SITECUSTOMIZE
1897 " USE_SITECUSTOMIZE"
1904 while (SvCUR(opts_prog) > opts+76) {
1905 /* find last space after "options: " and before col 76
1909 char * const pv = SvPV_nolen(opts_prog);
1910 const char c = pv[opts+76];
1912 space = strrchr(pv+opts+26, ' ');
1914 if (!space) break; /* "Can't happen" */
1916 /* break the line before that space */
1919 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1920 STR_WITH_LEN("\\n "));
1923 sv_catpvs(opts_prog,"\\n\",");
1925 #if defined(LOCAL_PATCH_COUNT)
1926 if (LOCAL_PATCH_COUNT > 0) {
1928 sv_catpvs(opts_prog,
1929 "\" Locally applied patches:\\n\",");
1930 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1931 if (PL_localpatches[i])
1932 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1933 0, PL_localpatches[i], 0);
1937 Perl_sv_catpvf(aTHX_ opts_prog,
1938 "\" Built under %s\\n\"",OSNAME);
1941 Perl_sv_catpvf(aTHX_ opts_prog,
1942 ",\" Compiled at %s %s\\n\"",__DATE__,
1945 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1949 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1950 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1951 "sort grep {/^PERL/} keys %ENV; ");
1953 sv_catpvs(opts_prog,
1954 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1956 sv_catpvs(opts_prog,
1957 "print \" \\%ENV:\\n @env\\n\" if @env;"
1958 "print \" \\@INC:\\n @INC\\n\";");
1962 opts_prog = Perl_newSVpvf(aTHX_
1963 "Config::config_vars(qw%c%s%c)",
1967 av_push(PL_preambleav, opts_prog);
1968 /* don't look for script or read stdin */
1969 scriptname = BIT_BUCKET;
1973 PL_doextract = TRUE;
1981 if (!*++s || isSPACE(*s)) {
1985 /* catch use of gnu style long options */
1986 if (strEQ(s, "version")) {
1990 if (strEQ(s, "help")) {
1997 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2003 #ifndef SECURE_INTERNAL_GETENV
2006 (s = PerlEnv_getenv("PERL5OPT")))
2008 const char *popt = s;
2011 if (*s == '-' && *(s+1) == 'T') {
2012 CHECK_MALLOC_TOO_LATE_FOR('T');
2014 PL_taint_warn = FALSE;
2017 char *popt_copy = NULL;
2030 if (!strchr("CDIMUdmtwA", *s))
2031 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2035 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2036 s = popt_copy + (s - popt);
2037 d = popt_copy + (d - popt);
2044 if( !PL_tainting ) {
2045 PL_taint_warn = TRUE;
2055 #ifdef USE_SITECUSTOMIZE
2058 PL_preambleav = newAV();
2059 av_unshift(PL_preambleav, 1);
2060 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2065 scriptname = argv[0];
2068 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2070 else if (scriptname == NULL) {
2072 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2078 /* Set $^X early so that it can be used for relocatable paths in @INC */
2079 assert (!PL_tainted);
2081 S_set_caret_X(aTHX);
2088 = open_script(scriptname, dosearch, sv, &suidscript);
2090 validate_suid(validarg, scriptname, fdscript, suidscript);
2093 # if defined(SIGCHLD) || defined(SIGCLD)
2096 # define SIGCHLD SIGCLD
2098 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2099 if (sigstate == (Sighandler_t) SIG_IGN) {
2100 if (ckWARN(WARN_SIGNAL))
2101 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2102 "Can't ignore signal CHLD, forcing to default");
2103 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2110 #ifdef MACOS_TRADITIONAL
2111 || gMacPerl_AlwaysExtract
2115 /* This will croak if suidscript is >= 0, as -x cannot be used with
2117 forbid_setid('x', suidscript);
2118 /* Hence you can't get here if suidscript >= 0 */
2121 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2122 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2126 PL_main_cv = PL_compcv = (CV*)newSV(0);
2127 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2128 CvUNIQUE_on(PL_compcv);
2130 CvPADLIST(PL_compcv) = pad_new(0);
2133 boot_core_UNIVERSAL();
2134 boot_core_xsutils();
2137 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2139 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2145 # ifdef HAS_SOCKS5_INIT
2146 socks5_init(argv[0]);
2152 init_predump_symbols();
2153 /* init_postdump_symbols not currently designed to be called */
2154 /* more than once (ENV isn't cleared first, for example) */
2155 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2157 init_postdump_symbols(argc,argv,env);
2159 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2160 * or explicitly in some platforms.
2161 * locale.c:Perl_init_i18nl10n() if the environment
2162 * look like the user wants to use UTF-8. */
2163 #if defined(__SYMBIAN32__)
2164 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2167 /* Requires init_predump_symbols(). */
2168 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2173 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2174 * and the default open disciplines. */
2175 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2176 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2178 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2179 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2180 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2182 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2183 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2184 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2186 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2187 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2188 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2190 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2191 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2194 sv_setpvn(sv, ":utf8\0:utf8", 11);
2196 sv_setpvn(sv, ":utf8\0", 6);
2199 sv_setpvn(sv, "\0:utf8", 6);
2205 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2206 if (strEQ(s, "unsafe"))
2207 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2208 else if (strEQ(s, "safe"))
2209 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2211 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2215 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2219 PL_xmlfp = PerlIO_stdout();
2221 PL_xmlfp = PerlIO_open(s, "w");
2223 Perl_croak(aTHX_ "Can't open %s", s);
2225 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2227 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2228 PL_madskills = atoi(s);
2229 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2235 /* now parse the script */
2237 SETERRNO(0,SS_NORMAL);
2239 #ifdef MACOS_TRADITIONAL
2240 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2242 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2244 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2245 MacPerl_MPWFileName(PL_origfilename));
2249 if (yyparse() || PL_error_count) {
2251 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2253 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2258 CopLINE_set(PL_curcop, 0);
2259 PL_curstash = PL_defstash;
2260 PL_preprocess = FALSE;
2262 SvREFCNT_dec(PL_e_script);
2270 SAVECOPFILE(PL_curcop);
2271 SAVECOPLINE(PL_curcop);
2272 gv_check(PL_defstash);
2279 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2280 dump_mstats("after compilation:");
2289 =for apidoc perl_run
2291 Tells a Perl interpreter to run. See L<perlembed>.
2304 PERL_UNUSED_ARG(my_perl);
2306 oldscope = PL_scopestack_ix;
2314 cxstack_ix = -1; /* start context stack again */
2316 case 0: /* normal completion */
2320 case 2: /* my_exit() */
2321 while (PL_scopestack_ix > oldscope)
2324 PL_curstash = PL_defstash;
2325 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2326 PL_endav && !PL_minus_c)
2327 call_list(oldscope, PL_endav);
2329 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2330 dump_mstats("after execution: ");
2336 POPSTACK_TO(PL_mainstack);
2339 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2351 S_run_body(pTHX_ I32 oldscope)
2354 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2355 PL_sawampersand ? "Enabling" : "Omitting"));
2357 if (!PL_restartop) {
2361 exit(0); /* less likely to core dump than my_exit(0) */
2364 DEBUG_x(dump_all());
2367 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2369 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2373 #ifdef MACOS_TRADITIONAL
2374 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2375 (gMacPerl_ErrorFormat ? "# " : ""),
2376 MacPerl_MPWFileName(PL_origfilename));
2378 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2382 if (PERLDB_SINGLE && PL_DBsingle)
2383 sv_setiv(PL_DBsingle, 1);
2385 call_list(oldscope, PL_initav);
2391 PL_op = PL_restartop;
2395 else if (PL_main_start) {
2396 CvDEPTH(PL_main_cv) = 1;
2397 PL_op = PL_main_start;
2405 =head1 SV Manipulation Functions
2407 =for apidoc p||get_sv
2409 Returns the SV of the specified Perl scalar. If C<create> is set and the
2410 Perl variable does not exist then it will be created. If C<create> is not
2411 set and the variable does not exist then NULL is returned.
2417 Perl_get_sv(pTHX_ const char *name, I32 create)
2420 gv = gv_fetchpv(name, create, SVt_PV);
2427 =head1 Array Manipulation Functions
2429 =for apidoc p||get_av
2431 Returns the AV of the specified Perl array. If C<create> is set and the
2432 Perl variable does not exist then it will be created. If C<create> is not
2433 set and the variable does not exist then NULL is returned.
2439 Perl_get_av(pTHX_ const char *name, I32 create)
2441 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2450 =head1 Hash Manipulation Functions
2452 =for apidoc p||get_hv
2454 Returns the HV of the specified Perl hash. If C<create> is set and the
2455 Perl variable does not exist then it will be created. If C<create> is not
2456 set and the variable does not exist then NULL is returned.
2462 Perl_get_hv(pTHX_ const char *name, I32 create)
2464 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2473 =head1 CV Manipulation Functions
2475 =for apidoc p||get_cv
2477 Returns the CV of the specified Perl subroutine. If C<create> is set and
2478 the Perl subroutine does not exist then it will be declared (which has the
2479 same effect as saying C<sub name;>). If C<create> is not set and the
2480 subroutine does not exist then NULL is returned.
2486 Perl_get_cv(pTHX_ const char *name, I32 create)
2488 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2489 /* XXX unsafe for threads if eval_owner isn't held */
2490 /* XXX this is probably not what they think they're getting.
2491 * It has the same effect as "sub name;", i.e. just a forward
2493 if (create && !GvCVu(gv))
2494 return newSUB(start_subparse(FALSE, 0),
2495 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2502 /* Be sure to refetch the stack pointer after calling these routines. */
2506 =head1 Callback Functions
2508 =for apidoc p||call_argv
2510 Performs a callback to the specified Perl sub. See L<perlcall>.
2516 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2518 /* See G_* flags in cop.h */
2519 /* null terminated arg list */
2527 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2532 return call_pv(sub_name, flags);
2536 =for apidoc p||call_pv
2538 Performs a callback to the specified Perl sub. See L<perlcall>.
2544 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2545 /* name of the subroutine */
2546 /* See G_* flags in cop.h */
2548 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2552 =for apidoc p||call_method
2554 Performs a callback to the specified Perl method. The blessed object must
2555 be on the stack. See L<perlcall>.
2561 Perl_call_method(pTHX_ const char *methname, I32 flags)
2562 /* name of the subroutine */
2563 /* See G_* flags in cop.h */
2565 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2568 /* May be called with any of a CV, a GV, or an SV containing the name. */
2570 =for apidoc p||call_sv
2572 Performs a callback to the Perl sub whose name is in the SV. See
2579 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2580 /* See G_* flags in cop.h */
2583 LOGOP myop; /* fake syntax tree node */
2588 bool oldcatch = CATCH_GET;
2590 OP* const oldop = PL_op;
2593 if (flags & G_DISCARD) {
2598 Zero(&myop, 1, LOGOP);
2599 myop.op_next = NULL;
2600 if (!(flags & G_NOARGS))
2601 myop.op_flags |= OPf_STACKED;
2602 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2603 (flags & G_ARRAY) ? OPf_WANT_LIST :
2608 EXTEND(PL_stack_sp, 1);
2609 *++PL_stack_sp = sv;
2611 oldscope = PL_scopestack_ix;
2613 if (PERLDB_SUB && PL_curstash != PL_debstash
2614 /* Handle first BEGIN of -d. */
2615 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2616 /* Try harder, since this may have been a sighandler, thus
2617 * curstash may be meaningless. */
2618 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2619 && !(flags & G_NODEBUG))
2620 PL_op->op_private |= OPpENTERSUB_DB;
2622 if (flags & G_METHOD) {
2623 Zero(&method_op, 1, UNOP);
2624 method_op.op_next = PL_op;
2625 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2626 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2627 PL_op = (OP*)&method_op;
2630 if (!(flags & G_EVAL)) {
2632 CALL_BODY_SUB((OP*)&myop);
2633 retval = PL_stack_sp - (PL_stack_base + oldmark);
2634 CATCH_SET(oldcatch);
2637 myop.op_other = (OP*)&myop;
2639 create_eval_scope(flags|G_FAKINGEVAL);
2647 CALL_BODY_SUB((OP*)&myop);
2648 retval = PL_stack_sp - (PL_stack_base + oldmark);
2649 if (!(flags & G_KEEPERR))
2650 sv_setpvn(ERRSV,"",0);
2656 /* my_exit() was called */
2657 PL_curstash = PL_defstash;
2660 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2661 Perl_croak(aTHX_ "Callback called exit");
2666 PL_op = PL_restartop;
2670 PL_stack_sp = PL_stack_base + oldmark;
2671 if (flags & G_ARRAY)
2675 *++PL_stack_sp = &PL_sv_undef;
2680 if (PL_scopestack_ix > oldscope)
2681 delete_eval_scope();
2685 if (flags & G_DISCARD) {
2686 PL_stack_sp = PL_stack_base + oldmark;
2695 /* Eval a string. The G_EVAL flag is always assumed. */
2698 =for apidoc p||eval_sv
2700 Tells Perl to C<eval> the string in the SV.
2706 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2708 /* See G_* flags in cop.h */
2712 UNOP myop; /* fake syntax tree node */
2713 VOL I32 oldmark = SP - PL_stack_base;
2716 OP* const oldop = PL_op;
2719 if (flags & G_DISCARD) {
2726 Zero(PL_op, 1, UNOP);
2727 EXTEND(PL_stack_sp, 1);
2728 *++PL_stack_sp = sv;
2730 if (!(flags & G_NOARGS))
2731 myop.op_flags = OPf_STACKED;
2732 myop.op_next = NULL;
2733 myop.op_type = OP_ENTEREVAL;
2734 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2735 (flags & G_ARRAY) ? OPf_WANT_LIST :
2737 if (flags & G_KEEPERR)
2738 myop.op_flags |= OPf_SPECIAL;
2740 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2741 * before a PUSHEVAL, which corrupts the stack after a croak */
2742 TAINT_PROPER("eval_sv()");
2748 CALL_BODY_EVAL((OP*)&myop);
2749 retval = PL_stack_sp - (PL_stack_base + oldmark);
2750 if (!(flags & G_KEEPERR))
2751 sv_setpvn(ERRSV,"",0);
2757 /* my_exit() was called */
2758 PL_curstash = PL_defstash;
2761 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2762 Perl_croak(aTHX_ "Callback called exit");
2767 PL_op = PL_restartop;
2771 PL_stack_sp = PL_stack_base + oldmark;
2772 if (flags & G_ARRAY)
2776 *++PL_stack_sp = &PL_sv_undef;
2782 if (flags & G_DISCARD) {
2783 PL_stack_sp = PL_stack_base + oldmark;
2793 =for apidoc p||eval_pv
2795 Tells Perl to C<eval> the given string and return an SV* result.
2801 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2805 SV* sv = newSVpv(p, 0);
2807 eval_sv(sv, G_SCALAR);
2814 if (croak_on_error && SvTRUE(ERRSV)) {
2815 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2821 /* Require a module. */
2824 =head1 Embedding Functions
2826 =for apidoc p||require_pv
2828 Tells Perl to C<require> the file named by the string argument. It is
2829 analogous to the Perl code C<eval "require '$file'">. It's even
2830 implemented that way; consider using load_module instead.
2835 Perl_require_pv(pTHX_ const char *pv)
2840 PUSHSTACKi(PERLSI_REQUIRE);
2842 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2843 eval_sv(sv_2mortal(sv), G_DISCARD);
2849 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2851 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2854 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2858 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2860 /* This message really ought to be max 23 lines.
2861 * Removed -h because the user already knows that option. Others? */
2863 static const char * const usage_msg[] = {
2864 "-0[octal] specify record separator (\\0, if no argument)",
2865 "-A[mod][=pattern] activate all/given assertions",
2866 "-a autosplit mode with -n or -p (splits $_ into @F)",
2867 "-C[number/list] enables the listed Unicode features",
2868 "-c check syntax only (runs BEGIN and CHECK blocks)",
2869 "-d[:debugger] run program under debugger",
2870 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2871 "-e program one line of program (several -e's allowed, omit programfile)",
2872 "-E program like -e, but enables all optional features",
2873 "-f don't do $sitelib/sitecustomize.pl at startup",
2874 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2875 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2876 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2877 "-l[octal] enable line ending processing, specifies line terminator",
2878 "-[mM][-]module execute \"use/no module...\" before executing program",
2879 "-n assume \"while (<>) { ... }\" loop around program",
2880 "-p assume loop like -n but print line also, like sed",
2881 "-P run program through C preprocessor before compilation",
2882 "-s enable rudimentary parsing for switches after programfile",
2883 "-S look for programfile using PATH environment variable",
2884 "-t enable tainting warnings",
2885 "-T enable tainting checks",
2886 "-u dump core after parsing program",
2887 "-U allow unsafe operations",
2888 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2889 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2890 "-w enable many useful warnings (RECOMMENDED)",
2891 "-W enable all warnings",
2892 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2893 "-X disable all warnings",
2897 const char * const *p = usage_msg;
2899 PerlIO_printf(PerlIO_stdout(),
2900 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2903 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2906 /* convert a string of -D options (or digits) into an int.
2907 * sets *s to point to the char after the options */
2911 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2913 static const char * const usage_msgd[] = {
2914 " Debugging flag values: (see also -d)",
2915 " p Tokenizing and parsing (with v, displays parse stack)",
2916 " s Stack snapshots (with v, displays all stacks)",
2917 " l Context (loop) stack processing",
2918 " t Trace execution",
2919 " o Method and overloading resolution",
2920 " c String/numeric conversions",
2921 " P Print profiling info, preprocessor command for -P, source file input state",
2922 " m Memory allocation",
2923 " f Format processing",
2924 " r Regular expression parsing and execution",
2925 " x Syntax tree dump",
2926 " u Tainting checks",
2927 " H Hash dump -- usurps values()",
2928 " X Scratchpad allocation",
2930 " S Thread synchronization",
2932 " R Include reference counts of dumped variables (eg when using -Ds)",
2933 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2934 " v Verbose: use in conjunction with other flags",
2936 " A Consistency checks on internal structures",
2937 " q quiet - currently only suppresses the 'EXECUTING' message",
2942 /* if adding extra options, remember to update DEBUG_MASK */
2943 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2945 for (; isALNUM(**s); (*s)++) {
2946 const char * const d = strchr(debopts,**s);
2948 i |= 1 << (d - debopts);
2949 else if (ckWARN_d(WARN_DEBUGGING))
2950 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2951 "invalid option -D%c, use -D'' to see choices\n", **s);
2954 else if (isDIGIT(**s)) {
2956 for (; isALNUM(**s); (*s)++) ;
2958 else if (givehelp) {
2959 const char *const *p = usage_msgd;
2960 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2963 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2964 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2965 "-Dp not implemented on this platform\n");
2971 /* This routine handles any switches that can be given during run */
2974 Perl_moreswitches(pTHX_ char *s)
2985 SvREFCNT_dec(PL_rs);
2986 if (s[1] == 'x' && s[2]) {
2987 const char *e = s+=2;
2993 flags = PERL_SCAN_SILENT_ILLDIGIT;
2994 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2995 if (s + numlen < e) {
2996 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3000 PL_rs = newSVpvs("");
3001 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3002 tmps = (U8*)SvPVX(PL_rs);
3003 uvchr_to_utf8(tmps, rschar);
3004 SvCUR_set(PL_rs, UNISKIP(rschar));
3009 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3010 if (rschar & ~((U8)~0))
3011 PL_rs = &PL_sv_undef;
3012 else if (!rschar && numlen >= 2)
3013 PL_rs = newSVpvs("");
3015 char ch = (char)rschar;
3016 PL_rs = newSVpvn(&ch, 1);
3019 sv_setsv(get_sv("/", TRUE), PL_rs);
3024 PL_unicode = parse_unicode_opts( (const char **)&s );
3025 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3031 while (*s && !isSPACE(*s)) ++s;
3032 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3043 forbid_setid('d', -1);
3046 /* -dt indicates to the debugger that threads will be used */
3047 if (*s == 't' && !isALNUM(s[1])) {
3049 my_setenv("PERL5DB_THREADED", "1");
3052 /* The following permits -d:Mod to accepts arguments following an =
3053 in the fashion that -MSome::Mod does. */
3054 if (*s == ':' || *s == '=') {
3056 SV * const sv = newSVpvs("use Devel::");
3058 /* We now allow -d:Module=Foo,Bar */
3059 while(isALNUM(*s) || *s==':') ++s;
3061 sv_catpv(sv, start);
3063 sv_catpvn(sv, start, s-start);
3064 /* Don't use NUL as q// delimiter here, this string goes in the
3066 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3069 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3072 PL_perldb = PERLDB_ALL;
3079 forbid_setid('D', -1);
3081 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3082 #else /* !DEBUGGING */
3083 if (ckWARN_d(WARN_DEBUGGING))
3084 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3085 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3086 for (s++; isALNUM(*s); s++) ;
3091 usage(PL_origargv[0]);
3094 Safefree(PL_inplace);
3095 #if defined(__CYGWIN__) /* do backup extension automagically */
3096 if (*(s+1) == '\0') {
3097 PL_inplace = savepvs(".bak");
3100 #endif /* __CYGWIN__ */
3102 const char * const start = ++s;
3103 while (*s && !isSPACE(*s))
3106 PL_inplace = savepvn(start, s - start);
3110 if (*s == '-') /* Additional switches on #! line. */
3114 case 'I': /* -I handled both here and in parse_body() */
3115 forbid_setid('I', -1);
3117 while (*s && isSPACE(*s))
3122 /* ignore trailing spaces (possibly followed by other switches) */
3124 for (e = p; *e && !isSPACE(*e); e++) ;
3128 } while (*p && *p != '-');
3129 e = savepvn(s, e-s);
3130 incpush(e, TRUE, TRUE, FALSE, FALSE);
3137 Perl_croak(aTHX_ "No directory specified for -I");
3143 SvREFCNT_dec(PL_ors_sv);
3149 PL_ors_sv = newSVpvs("\n");
3150 numlen = 3 + (*s == '0');
3151 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3155 if (RsPARA(PL_rs)) {
3156 PL_ors_sv = newSVpvs("\n\n");
3159 PL_ors_sv = newSVsv(PL_rs);
3164 forbid_setid('A', -1);
3166 PL_preambleav = newAV();
3169 char * const start = s;
3170 SV * const sv = newSVpvs("use assertions::activate");
3171 while(isALNUM(*s) || *s == ':') ++s;
3173 sv_catpvs(sv, "::");
3174 sv_catpvn(sv, start, s-start);
3177 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3180 else if (*s != '\0') {
3181 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3183 av_push(PL_preambleav, sv);
3187 forbid_setid('M', -1); /* XXX ? */
3190 forbid_setid('m', -1); /* XXX ? */
3194 const char *use = "use ";
3195 /* -M-foo == 'no foo' */
3196 /* Leading space on " no " is deliberate, to make both
3197 possibilities the same length. */
3198 if (*s == '-') { use = " no "; ++s; }
3199 sv = newSVpvn(use,4);
3201 /* We allow -M'Module qw(Foo Bar)' */
3202 while(isALNUM(*s) || *s==':') ++s;
3204 sv_catpv(sv, start);
3205 if (*(start-1) == 'm') {
3207 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3208 sv_catpvs( sv, " ()");
3212 Perl_croak(aTHX_ "Module name required with -%c option",
3214 sv_catpvn(sv, start, s-start);
3215 sv_catpvs(sv, " split(/,/,q");
3216 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3218 sv_catpvs(sv, "\0)");
3222 PL_preambleav = newAV();
3223 av_push(PL_preambleav, sv);
3226 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3237 forbid_setid('s', -1);
3238 PL_doswitches = TRUE;
3252 #ifdef MACOS_TRADITIONAL
3253 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3255 PL_do_undump = TRUE;
3263 if (!sv_derived_from(PL_patchlevel, "version"))
3264 upg_version(PL_patchlevel);
3266 PerlIO_printf(PerlIO_stdout(),
3267 Perl_form(aTHX_ "\nThis is perl, %"SVf
3268 #ifdef PERL_PATCHNUM
3269 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3272 SVfARG(vstringify(PL_patchlevel)),
3275 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3276 PerlIO_printf(PerlIO_stdout(),
3277 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3278 SVfARG(vstringify(PL_patchlevel))));
3279 PerlIO_printf(PerlIO_stdout(),
3280 Perl_form(aTHX_ " built under %s at %s %s\n",
3281 OSNAME, __DATE__, __TIME__));
3282 PerlIO_printf(PerlIO_stdout(),
3283 Perl_form(aTHX_ " OS Specific Release: %s\n",
3287 #if defined(LOCAL_PATCH_COUNT)
3288 if (LOCAL_PATCH_COUNT > 0)
3289 PerlIO_printf(PerlIO_stdout(),
3290 "\n(with %d registered patch%s, "
3291 "see perl -V for more detail)",
3293 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "\n\nCopyright 1987-2006, Larry Wall\n");
3298 #ifdef MACOS_TRADITIONAL
3299 PerlIO_printf(PerlIO_stdout(),
3300 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3301 "maintained by Chris Nandor\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3308 PerlIO_printf(PerlIO_stdout(),
3309 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3310 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3315 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "atariST series port, ++jrb bammi@cadence.com\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3326 PerlIO_printf(PerlIO_stdout(),
3327 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3330 PerlIO_printf(PerlIO_stdout(),
3331 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3334 PerlIO_printf(PerlIO_stdout(),
3335 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "MiNT port by Guido Flohr, 1997-1999\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "EPOC port by Olaf Flebbe, 1999-2002\n");
3354 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3355 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3358 #ifdef __SYMBIAN32__
3359 PerlIO_printf(PerlIO_stdout(),
3360 "Symbian port by Nokia, 2004-2005\n");
3362 #ifdef BINARY_BUILD_NOTICE
3363 BINARY_BUILD_NOTICE;
3365 PerlIO_printf(PerlIO_stdout(),
3367 Perl may be copied only under the terms of either the Artistic License or the\n\
3368 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3369 Complete documentation for Perl, including FAQ lists, should be found on\n\
3370 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3371 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3374 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3375 PL_dowarn |= G_WARN_ON;
3380 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3381 if (!specialWARN(PL_compiling.cop_warnings))
3382 PerlMemShared_free(PL_compiling.cop_warnings);
3383 PL_compiling.cop_warnings = pWARN_ALL ;
3387 PL_dowarn = G_WARN_ALL_OFF;
3388 if (!specialWARN(PL_compiling.cop_warnings))
3389 PerlMemShared_free(PL_compiling.cop_warnings);
3390 PL_compiling.cop_warnings = pWARN_NONE ;
3395 if (s[1] == '-') /* Additional switches on #! line. */
3400 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3406 #ifdef ALTERNATE_SHEBANG
3407 case 'S': /* OS/2 needs -S on "extproc" line. */
3415 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3420 /* compliments of Tom Christiansen */
3422 /* unexec() can be found in the Gnu emacs distribution */
3423 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3426 Perl_my_unexec(pTHX)
3428 PERL_UNUSED_CONTEXT;
3430 SV * prog = newSVpv(BIN_EXP, 0);
3431 SV * file = newSVpv(PL_origfilename, 0);
3435 sv_catpvs(prog, "/perl");
3436 sv_catpvs(file, ".perldump");
3438 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3439 /* unexec prints msg to stderr in case of failure */
3440 PerlProc_exit(status);
3443 # include <lib$routines.h>
3444 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3445 # elif defined(WIN32) || defined(__CYGWIN__)
3446 Perl_croak(aTHX_ "dump is not supported");
3448 ABORT(); /* for use with undump */
3453 /* initialize curinterp */
3459 # define PERLVAR(var,type)
3460 # define PERLVARA(var,n,type)
3461 # if defined(PERL_IMPLICIT_CONTEXT)
3462 # define PERLVARI(var,type,init) aTHX->var = init;
3463 # define PERLVARIC(var,type,init) aTHX->var = init;
3465 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3466 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3468 # include "intrpvar.h"
3469 # include "thrdvar.h"
3475 # define PERLVAR(var,type)
3476 # define PERLVARA(var,n,type)
3477 # define PERLVARI(var,type,init) PL_##var = init;
3478 # define PERLVARIC(var,type,init) PL_##var = init;
3479 # include "intrpvar.h"
3480 # include "thrdvar.h"
3487 /* As these are inside a structure, PERLVARI isn't capable of initialising
3489 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3490 PL_reg_poscache = PL_reg_starttry = NULL;
3494 S_init_main_stash(pTHX)
3499 PL_curstash = PL_defstash = newHV();
3500 /* We know that the string "main" will be in the global shared string
3501 table, so it's a small saving to use it rather than allocate another
3503 PL_curstname = newSVpvs_share("main");
3504 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3505 /* If we hadn't caused another reference to "main" to be in the shared
3506 string table above, then it would be worth reordering these two,
3507 because otherwise all we do is delete "main" from it as a consequence
3508 of the SvREFCNT_dec, only to add it again with hv_name_set */
3509 SvREFCNT_dec(GvHV(gv));
3510 hv_name_set(PL_defstash, "main", 4, 0);
3511 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3513 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3515 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3516 GvMULTI_on(PL_incgv);
3517 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3518 GvMULTI_on(PL_hintgv);
3519 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3520 SvREFCNT_inc_simple(PL_defgv);
3521 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3522 SvREFCNT_inc_simple(PL_errgv);
3523 GvMULTI_on(PL_errgv);
3524 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3525 GvMULTI_on(PL_replgv);
3526 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3527 #ifdef PERL_DONT_CREATE_GVSV
3530 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3531 sv_setpvn(ERRSV, "", 0);
3532 PL_curstash = PL_defstash;
3533 CopSTASH_set(&PL_compiling, PL_defstash);
3534 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3535 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3537 /* We must init $/ before switches are processed. */
3538 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3542 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3548 const char *cpp_discard_flag;
3557 PL_origfilename = savepvs("-e");
3560 /* if find_script() returns, it returns a malloc()-ed value */
3561 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3563 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3564 const char *s = scriptname + 8;
3570 * Tell apart "normal" usage of fdscript, e.g.
3571 * with bash on FreeBSD:
3572 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3573 * from usage in suidperl.
3574 * Does any "normal" usage leave garbage after the number???
3575 * Is it a mistake to use a similar /dev/fd/ construct for
3580 * Be supersafe and do some sanity-checks.
3581 * Still, can we be sure we got the right thing?
3584 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3587 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3589 scriptname = savepv(s + 1);
3590 Safefree(PL_origfilename);
3591 PL_origfilename = (char *)scriptname;
3596 CopFILE_free(PL_curcop);
3597 CopFILE_set(PL_curcop, PL_origfilename);
3598 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3599 scriptname = (char *)"";
3600 if (fdscript >= 0) {
3601 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3602 # if defined(HAS_FCNTL) && defined(F_SETFD)
3604 /* ensure close-on-exec */
3605 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3610 Perl_croak(aTHX_ "sperl needs fd script\n"
3611 "You should not call sperl directly; do you need to "
3612 "change a #! line\nfrom sperl to perl?\n");
3615 * Do not open (or do other fancy stuff) while setuid.
3616 * Perl does the open, and hands script to suidperl on a fd;
3617 * suidperl only does some checks, sets up UIDs and re-execs
3618 * perl with that fd as it has always done.
3621 if (*suidscript != 1) {
3622 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3625 else if (PL_preprocess) {
3626 const char * const cpp_cfg = CPPSTDIN;
3627 SV * const cpp = newSVpvs("");
3628 SV * const cmd = newSV(0);
3630 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3631 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3632 if (strEQ(cpp_cfg, "cppstdin"))
3633 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3634 sv_catpv(cpp, cpp_cfg);
3637 sv_catpvs(sv, "-I");
3638 sv_catpv(sv,PRIVLIB_EXP);
3641 DEBUG_P(PerlIO_printf(Perl_debug_log,
3642 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3643 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3646 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3653 cpp_discard_flag = "";
3655 cpp_discard_flag = "-C";
3659 perl = os2_execname(aTHX);
3661 perl = PL_origargv[0];
3665 /* This strips off Perl comments which might interfere with
3666 the C pre-processor, including #!. #line directives are
3667 deliberately stripped to avoid confusion with Perl's version
3668 of #line. FWP played some golf with it so it will fit
3669 into VMS's 255 character buffer.
3672 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3674 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3676 Perl_sv_setpvf(aTHX_ cmd, "\
3677 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3678 perl, quote, code, quote, scriptname, SVfARG(cpp),
3679 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3681 PL_doextract = FALSE;
3683 DEBUG_P(PerlIO_printf(Perl_debug_log,
3684 "PL_preprocess: cmd=\"%s\"\n",
3687 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3691 else if (!*scriptname) {
3692 forbid_setid(0, *suidscript);
3693 PL_rsfp = PerlIO_stdin();
3696 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3697 # if defined(HAS_FCNTL) && defined(F_SETFD)
3699 /* ensure close-on-exec */
3700 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3703 #endif /* IAMSUID */
3705 /* PSz 16 Sep 03 Keep neat error message */
3707 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3709 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3710 CopFILE(PL_curcop), Strerror(errno));
3716 * I_SYSSTATVFS HAS_FSTATVFS
3718 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3719 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3720 * here so that metaconfig picks them up. */
3724 S_fd_on_nosuid_fs(pTHX_ int fd)
3727 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3728 * but is needed also on machines without setreuid.
3729 * Seems safe enough to run as root.
3731 int check_okay = 0; /* able to do all the required sys/libcalls */
3732 int on_nosuid = 0; /* the fd is on a nosuid fs */
3734 * Need to check noexec also: nosuid might not be set, the average
3735 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3737 int on_noexec = 0; /* the fd is on a noexec fs */
3740 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3741 * fstatvfs() is UNIX98.
3742 * fstatfs() is 4.3 BSD.
3743 * ustat()+getmnt() is pre-4.3 BSD.
3744 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3745 * an irrelevant filesystem while trying to reach the right one.
3748 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3750 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3751 defined(HAS_FSTATVFS)
3752 # define FD_ON_NOSUID_CHECK_OKAY
3753 struct statvfs stfs;
3755 check_okay = fstatvfs(fd, &stfs) == 0;
3756 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3758 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3759 on platforms where it is present. */
3760 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3762 # endif /* fstatvfs */
3764 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3765 defined(PERL_MOUNT_NOSUID) && \
3766 defined(PERL_MOUNT_NOEXEC) && \
3767 defined(HAS_FSTATFS) && \
3768 defined(HAS_STRUCT_STATFS) && \
3769 defined(HAS_STRUCT_STATFS_F_FLAGS)
3770 # define FD_ON_NOSUID_CHECK_OKAY
3773 check_okay = fstatfs(fd, &stfs) == 0;
3774 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3775 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3776 # endif /* fstatfs */
3778 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3779 defined(PERL_MOUNT_NOSUID) && \
3780 defined(PERL_MOUNT_NOEXEC) && \
3781 defined(HAS_FSTAT) && \
3782 defined(HAS_USTAT) && \
3783 defined(HAS_GETMNT) && \
3784 defined(HAS_STRUCT_FS_DATA) && \
3786 # define FD_ON_NOSUID_CHECK_OKAY
3789 if (fstat(fd, &fdst) == 0) {
3791 if (ustat(fdst.st_dev, &us) == 0) {
3793 /* NOSTAT_ONE here because we're not examining fields which
3794 * vary between that case and STAT_ONE. */
3795 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3796 size_t cmplen = sizeof(us.f_fname);
3797 if (sizeof(fsd.fd_req.path) < cmplen)
3798 cmplen = sizeof(fsd.fd_req.path);
3799 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3800 fdst.st_dev == fsd.fd_req.dev) {
3802 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3803 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3808 # endif /* fstat+ustat+getmnt */
3810 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3811 defined(HAS_GETMNTENT) && \
3812 defined(HAS_HASMNTOPT) && \
3813 defined(MNTOPT_NOSUID) && \
3814 defined(MNTOPT_NOEXEC)
3815 # define FD_ON_NOSUID_CHECK_OKAY
3816 FILE *mtab = fopen("/etc/mtab", "r");
3817 struct mntent *entry;
3820 if (mtab && (fstat(fd, &stb) == 0)) {
3821 while (entry = getmntent(mtab)) {
3822 if (stat(entry->mnt_dir, &fsb) == 0
3823 && fsb.st_dev == stb.st_dev)
3825 /* found the filesystem */
3827 if (hasmntopt(entry, MNTOPT_NOSUID))
3829 if (hasmntopt(entry, MNTOPT_NOEXEC))
3832 } /* A single fs may well fail its stat(). */
3837 # endif /* getmntent+hasmntopt */
3840 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3842 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3844 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3845 return ((!check_okay) || on_nosuid || on_noexec);
3847 #endif /* IAMSUID */
3850 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3851 int fdscript, int suidscript)
3856 #endif /* IAMSUID */
3858 /* do we need to emulate setuid on scripts? */
3860 /* This code is for those BSD systems that have setuid #! scripts disabled
3861 * in the kernel because of a security problem. Merely defining DOSUID
3862 * in perl will not fix that problem, but if you have disabled setuid
3863 * scripts in the kernel, this will attempt to emulate setuid and setgid
3864 * on scripts that have those now-otherwise-useless bits set. The setuid
3865 * root version must be called suidperl or sperlN.NNN. If regular perl
3866 * discovers that it has opened a setuid script, it calls suidperl with
3867 * the same argv that it had. If suidperl finds that the script it has
3868 * just opened is NOT setuid root, it sets the effective uid back to the
3869 * uid. We don't just make perl setuid root because that loses the
3870 * effective uid we had before invoking perl, if it was different from the
3873 * Description/comments above do not match current workings:
3874 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3875 * suidperl called with script open and name changed to /dev/fd/N/X;
3876 * suidperl croaks if script is not setuid;
3877 * making perl setuid would be a huge security risk (and yes, that
3878 * would lose any euid we might have had).
3880 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3881 * be defined in suidperl only. suidperl must be setuid root. The
3882 * Configure script will set this up for you if you want it.
3888 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3889 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3890 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3892 const char *linestr;
3896 if (fdscript < 0 || suidscript != 1)
3897 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3899 * Since the script is opened by perl, not suidperl, some of these
3900 * checks are superfluous. Leaving them in probably does not lower
3904 * Do checks even for systems with no HAS_SETREUID.
3905 * We used to swap, then re-swap UIDs with
3907 if (setreuid(PL_euid,PL_uid) < 0
3908 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3909 Perl_croak(aTHX_ "Can't swap uid and euid");
3912 if (setreuid(PL_uid,PL_euid) < 0
3913 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3914 Perl_croak(aTHX_ "Can't reswap uid and euid");
3918 /* On this access check to make sure the directories are readable,
3919 * there is actually a small window that the user could use to make
3920 * filename point to an accessible directory. So there is a faint
3921 * chance that someone could execute a setuid script down in a
3922 * non-accessible directory. I don't know what to do about that.
3923 * But I don't think it's too important. The manual lies when
3924 * it says access() is useful in setuid programs.
3926 * So, access() is pretty useless... but not harmful... do anyway.
3928 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3929 Perl_croak(aTHX_ "Can't access() script\n");
3932 /* If we can swap euid and uid, then we can determine access rights
3933 * with a simple stat of the file, and then compare device and
3934 * inode to make sure we did stat() on the same file we opened.
3935 * Then we just have to make sure he or she can execute it.
3938 * As the script is opened by perl, not suidperl, we do not need to
3939 * care much about access rights.
3941 * The 'script changed' check is needed, or we can get lied to
3942 * about $0 with e.g.
3943 * suidperl /dev/fd/4//bin/x 4<setuidscript
3944 * Without HAS_SETREUID, is it safe to stat() as root?
3946 * Are there any operating systems that pass /dev/fd/xxx for setuid
3947 * scripts, as suggested/described in perlsec(1)? Surely they do not
3948 * pass the script name as we do, so the "script changed" test would
3949 * fail for them... but we never get here with
3950 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3952 * This is one place where we must "lie" about return status: not
3953 * say if the stat() failed. We are doing this as root, and could
3954 * be tricked into reporting existence or not of files that the
3955 * "plain" user cannot even see.
3959 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3960 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3961 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3962 Perl_croak(aTHX_ "Setuid script changed\n");
3966 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3967 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3970 * We used to do this check as the "plain" user (after swapping
3971 * UIDs). But the check for nosuid and noexec filesystem is needed,
3972 * and should be done even without HAS_SETREUID. (Maybe those
3973 * operating systems do not have such mount options anyway...)
3974 * Seems safe enough to do as root.
3976 #if !defined(NO_NOSUID_CHECK)
3977 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3978 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3981 #endif /* IAMSUID */
3983 if (!S_ISREG(PL_statbuf.st_mode)) {
3984 Perl_croak(aTHX_ "Setuid script not plain file\n");
3986 if (PL_statbuf.st_mode & S_IWOTH)
3987 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3988 PL_doswitches = FALSE; /* -s is insecure in suid */
3989 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3990 CopLINE_inc(PL_curcop);
3991 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3992 Perl_croak(aTHX_ "No #! line");
3993 linestr = SvPV_nolen_const(PL_linestr);
3994 /* required even on Sys V */
3995 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3996 Perl_croak(aTHX_ "No #! line");
4000 /* Sanity check on line length */
4001 s_end = s + strlen(s);
4002 if (s_end == s || (s_end - s) > 4000)
4003 Perl_croak(aTHX_ "Very long #! line");
4004 /* Allow more than a single space after #! */
4005 while (isSPACE(*s)) s++;
4006 /* Sanity check on buffer end */
4007 while ((*s) && !isSPACE(*s)) s++;
4008 for (s2 = s; (s2 > linestr &&
4009 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4010 || s2[-1] == '-')); s2--) ;
4011 /* Sanity check on buffer start */
4012 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4013 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4014 Perl_croak(aTHX_ "Not a perl script");
4015 while (*s == ' ' || *s == '\t') s++;
4017 * #! arg must be what we saw above. They can invoke it by
4018 * mentioning suidperl explicitly, but they may not add any strange
4019 * arguments beyond what #! says if they do invoke suidperl that way.
4022 * The way validarg was set up, we rely on the kernel to start
4023 * scripts with argv[1] set to contain all #! line switches (the
4027 * Check that we got all the arguments listed in the #! line (not
4028 * just that there are no extraneous arguments). Might not matter
4029 * much, as switches from #! line seem to be acted upon (also), and
4030 * so may be checked and trapped in perl. But, security checks must
4031 * be done in suidperl and not deferred to perl. Note that suidperl
4032 * does not get around to parsing (and checking) the switches on
4033 * the #! line (but execs perl sooner).
4034 * Allow (require) a trailing newline (which may be of two
4035 * characters on some architectures?) (but no other trailing
4038 len = strlen(validarg);
4039 if (strEQ(validarg," PHOOEY ") ||
4040 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4041 !((s_end - s) == len+1
4042 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4043 Perl_croak(aTHX_ "Args must match #! line");
4047 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4048 PL_euid == PL_statbuf.st_uid)
4050 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4051 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4052 #endif /* IAMSUID */
4055 PL_euid) { /* oops, we're not the setuid root perl */
4057 * When root runs a setuid script, we do not go through the same
4058 * steps of execing sperl and then perl with fd scripts, but
4059 * simply set up UIDs within the same perl invocation; so do
4060 * not have the same checks (on options, whatever) that we have
4061 * for plain users. No problem really: would have to be a script
4062 * that does not actually work for plain users; and if root is
4063 * foolish and can be persuaded to run such an unsafe script, he
4064 * might run also non-setuid ones, and deserves what he gets.
4066 * Or, we might drop the PL_euid check above (and rely just on
4067 * fdscript to avoid loops), and do the execs
4073 * Pass fd script to suidperl.
4074 * Exec suidperl, substituting fd script for scriptname.
4075 * Pass script name as "subdir" of fd, which perl will grok;
4076 * in fact will use that to distinguish this from "normal"
4077 * usage, see comments above.
4079 PerlIO_rewind(PL_rsfp);
4080 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4081 /* PSz 27 Feb 04 Sanity checks on scriptname */
4082 if ((!scriptname) || (!*scriptname) ) {
4083 Perl_croak(aTHX_ "No setuid script name\n");
4085 if (*scriptname == '-') {
4086 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4087 /* Or we might confuse it with an option when replacing
4088 * name in argument list, below (though we do pointer, not
4089 * string, comparisons).
4092 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4093 if (!PL_origargv[which]) {
4094 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4096 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4097 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4098 #if defined(HAS_FCNTL) && defined(F_SETFD)
4099 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4102 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4103 (int)PERL_REVISION, (int)PERL_VERSION,
4104 (int)PERL_SUBVERSION), PL_origargv);
4106 #endif /* IAMSUID */
4107 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4110 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4112 * This seems back to front: we try HAS_SETEGID first; if not available
4113 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4114 * in the sense that we only want to set EGID; but are there any machines
4115 * with either of the latter, but not the former? Same with UID, later.
4118 (void)setegid(PL_statbuf.st_gid);
4121 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4123 #ifdef HAS_SETRESGID
4124 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4126 PerlProc_setgid(PL_statbuf.st_gid);
4130 if (PerlProc_getegid() != PL_statbuf.st_gid)
4131 Perl_croak(aTHX_ "Can't do setegid!\n");
4133 if (PL_statbuf.st_mode & S_ISUID) {
4134 if (PL_statbuf.st_uid != PL_euid)
4136 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4139 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4141 #ifdef HAS_SETRESUID
4142 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4144 PerlProc_setuid(PL_statbuf.st_uid);
4148 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4149 Perl_croak(aTHX_ "Can't do seteuid!\n");
4151 else if (PL_uid) { /* oops, mustn't run as root */
4153 (void)seteuid((Uid_t)PL_uid);
4156 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4158 #ifdef HAS_SETRESUID
4159 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4161 PerlProc_setuid((Uid_t)PL_uid);
4165 if (PerlProc_geteuid() != PL_uid)
4166 Perl_croak(aTHX_ "Can't do seteuid!\n");
4169 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4170 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4173 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4174 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4175 else if (fdscript < 0 || suidscript != 1)
4176 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4177 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4179 /* PSz 16 Sep 03 Keep neat error message */
4180 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4183 /* We absolutely must clear out any saved ids here, so we */
4184 /* exec the real perl, substituting fd script for scriptname. */
4185 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4187 * It might be thought that using setresgid and/or setresuid (changed to
4188 * set the saved IDs) above might obviate the need to exec, and we could
4189 * go on to "do the perl thing".
4191 * Is there such a thing as "saved GID", and is that set for setuid (but
4192 * not setgid) execution like suidperl? Without exec, it would not be
4193 * cleared for setuid (but not setgid) scripts (or might need a dummy
4196 * We need suidperl to do the exact same argument checking that perl
4197 * does. Thus it cannot be very small; while it could be significantly
4198 * smaller, it is safer (simpler?) to make it essentially the same
4199 * binary as perl (but they are not identical). - Maybe could defer that
4200 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4201 * but prefer to do thorough checks in suidperl itself. Such deferral
4202 * would make suidperl security rely on perl, a design no-no.
4204 * Setuid things should be short and simple, thus easy to understand and
4205 * verify. They should do their "own thing", without influence by
4206 * attackers. It may help if their internal execution flow is fixed,
4207 * regardless of platform: it may be best to exec anyway.
4209 * Suidperl should at least be conceptually simple: a wrapper only,
4210 * never to do any real perl. Maybe we should put
4212 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4214 * into the perly bits.
4216 PerlIO_rewind(PL_rsfp);
4217 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4219 * Keep original arguments: suidperl already has fd script.
4221 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4222 /* if (!PL_origargv[which]) { */
4223 /* errno = EPERM; */
4224 /* Perl_croak(aTHX_ "Permission denied\n"); */
4226 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4227 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4228 #if defined(HAS_FCNTL) && defined(F_SETFD)
4229 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4232 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4233 (int)PERL_REVISION, (int)PERL_VERSION,
4234 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4236 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4237 #endif /* IAMSUID */
4239 PERL_UNUSED_ARG(fdscript);
4240 PERL_UNUSED_ARG(suidscript);
4241 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4242 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4243 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4244 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4246 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4249 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4250 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4251 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4252 /* not set-id, must be wrapped */
4255 PERL_UNUSED_ARG(validarg);
4256 PERL_UNUSED_ARG(scriptname);
4260 S_find_beginning(pTHX)
4264 register const char *s2;
4265 #ifdef MACOS_TRADITIONAL
4269 /* skip forward in input to the real script? */
4271 #ifdef MACOS_TRADITIONAL
4272 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4274 while (PL_doextract || gMacPerl_AlwaysExtract) {
4275 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4276 if (!gMacPerl_AlwaysExtract)
4277 Perl_croak(aTHX_ "No Perl script found in input\n");
4279 if (PL_doextract) /* require explicit override ? */
4280 if (!OverrideExtract(PL_origfilename))
4281 Perl_croak(aTHX_ "User aborted script\n");
4283 PL_doextract = FALSE;
4285 /* Pater peccavi, file does not have #! */
4286 PerlIO_rewind(PL_rsfp);
4291 while (PL_doextract) {
4292 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4293 Perl_croak(aTHX_ "No Perl script found in input\n");
4296 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4297 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4298 PL_doextract = FALSE;
4299 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4301 while (*s == ' ' || *s == '\t') s++;
4303 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4304 || s2[-1] == '_') s2--;
4305 if (strnEQ(s2-4,"perl",4))
4306 while ((s = moreswitches(s)))
4309 #ifdef MACOS_TRADITIONAL
4310 /* We are always searching for the #!perl line in MacPerl,
4311 * so if we find it, still keep the line count correct
4312 * by counting lines we already skipped over
4314 for (; maclines > 0 ; maclines--)
4315 PerlIO_ungetc(PL_rsfp, '\n');
4319 /* gMacPerl_AlwaysExtract is false in MPW tool */
4320 } else if (gMacPerl_AlwaysExtract) {
4332 PL_uid = PerlProc_getuid();
4333 PL_euid = PerlProc_geteuid();
4334 PL_gid = PerlProc_getgid();
4335 PL_egid = PerlProc_getegid();
4337 PL_uid |= PL_gid << 16;
4338 PL_euid |= PL_egid << 16;
4340 /* Should not happen: */
4341 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4342 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4345 * Should go by suidscript, not uid!=euid: why disallow
4346 * system("ls") in scripts run from setuid things?
4347 * Or, is this run before we check arguments and set suidscript?
4348 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4349 * (We never have suidscript, can we be sure to have fdscript?)
4350 * Or must then go by UID checks? See comments in forbid_setid also.
4354 /* This is used very early in the lifetime of the program,
4355 * before even the options are parsed, so PL_tainting has
4356 * not been initialized properly. */
4358 Perl_doing_taint(int argc, char *argv[], char *envp[])
4360 #ifndef PERL_IMPLICIT_SYS
4361 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4362 * before we have an interpreter-- and the whole point of this
4363 * function is to be called at such an early stage. If you are on
4364 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4365 * "tainted because running with altered effective ids', you'll
4366 * have to add your own checks somewhere in here. The two most
4367 * known samples of 'implicitness' are Win32 and NetWare, neither
4368 * of which has much of concept of 'uids'. */
4369 int uid = PerlProc_getuid();
4370 int euid = PerlProc_geteuid();
4371 int gid = PerlProc_getgid();
4372 int egid = PerlProc_getegid();
4379 if (uid && (euid != uid || egid != gid))
4381 #endif /* !PERL_IMPLICIT_SYS */
4382 /* This is a really primitive check; environment gets ignored only
4383 * if -T are the first chars together; otherwise one gets
4384 * "Too late" message. */
4385 if ( argc > 1 && argv[1][0] == '-'
4386 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4391 /* Passing the flag as a single char rather than a string is a slight space
4392 optimisation. The only message that isn't /^-.$/ is
4393 "program input from stdin", which is substituted in place of '\0', which
4394 could never be a command line flag. */
4396 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4399 char string[3] = "-x";
4400 const char *message = "program input from stdin";
4407 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4408 if (PL_euid != PL_uid)
4409 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4410 if (PL_egid != PL_gid)
4411 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4412 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4414 * Checks for UID/GID above "wrong": why disallow
4415 * perl -e 'print "Hello\n"'
4416 * from within setuid things?? Simply drop them: replaced by
4417 * fdscript/suidscript and #ifdef IAMSUID checks below.
4419 * This may be too late for command-line switches. Will catch those on
4420 * the #! line, after finding the script name and setting up
4421 * fdscript/suidscript. Note that suidperl does not get around to
4422 * parsing (and checking) the switches on the #! line, but checks that
4423 * the two sets are identical.
4425 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4426 * instead, or would that be "too late"? (We never have suidscript, can
4427 * we be sure to have fdscript?)
4429 * Catch things with suidscript (in descendant of suidperl), even with
4430 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4431 * below; but I am paranoid.
4433 * Also see comments about root running a setuid script, elsewhere.
4435 if (suidscript >= 0)
4436 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4438 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4439 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4440 #endif /* IAMSUID */
4444 Perl_init_debugger(pTHX)
4447 HV * const ostash = PL_curstash;
4449 PL_curstash = PL_debstash;
4450 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4452 AvREAL_off(PL_dbargs);
4453 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4454 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4455 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4456 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4457 sv_setiv(PL_DBsingle, 0);
4458 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4459 sv_setiv(PL_DBtrace, 0);
4460 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4461 sv_setiv(PL_DBsignal, 0);
4462 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4463 sv_setiv(PL_DBassertion, 0);
4464 PL_curstash = ostash;
4467 #ifndef STRESS_REALLOC
4468 #define REASONABLE(size) (size)
4470 #define REASONABLE(size) (1) /* unreasonable */
4474 Perl_init_stacks(pTHX)
4477 /* start with 128-item stack and 8K cxstack */
4478 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4479 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4480 PL_curstackinfo->si_type = PERLSI_MAIN;
4481 PL_curstack = PL_curstackinfo->si_stack;
4482 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4484 PL_stack_base = AvARRAY(PL_curstack);
4485 PL_stack_sp = PL_stack_base;
4486 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4488 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4491 PL_tmps_max = REASONABLE(128);
4493 Newx(PL_markstack,REASONABLE(32),I32);
4494 PL_markstack_ptr = PL_markstack;
4495 PL_markstack_max = PL_markstack + REASONABLE(32);
4499 Newx(PL_scopestack,REASONABLE(32),I32);
4500 PL_scopestack_ix = 0;
4501 PL_scopestack_max = REASONABLE(32);
4503 Newx(PL_savestack,REASONABLE(128),ANY);
4504 PL_savestack_ix = 0;
4505 PL_savestack_max = REASONABLE(128);
4514 while (PL_curstackinfo->si_next)
4515 PL_curstackinfo = PL_curstackinfo->si_next;
4516 while (PL_curstackinfo) {
4517 PERL_SI *p = PL_curstackinfo->si_prev;
4518 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4519 Safefree(PL_curstackinfo->si_cxstack);
4520 Safefree(PL_curstackinfo);
4521 PL_curstackinfo = p;
4523 Safefree(PL_tmps_stack);
4524 Safefree(PL_markstack);
4525 Safefree(PL_scopestack);
4526 Safefree(PL_savestack);
4536 lex_start(PL_linestr);
4538 PL_subname = newSVpvs("main");
4542 S_init_predump_symbols(pTHX)
4548 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4549 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4550 GvMULTI_on(PL_stdingv);
4551 io = GvIOp(PL_stdingv);
4552 IoTYPE(io) = IoTYPE_RDONLY;
4553 IoIFP(io) = PerlIO_stdin();
4554 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4556 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4558 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4561 IoTYPE(io) = IoTYPE_WRONLY;
4562 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4564 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4566 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4568 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4569 GvMULTI_on(PL_stderrgv);
4570 io = GvIOp(PL_stderrgv);
4571 IoTYPE(io) = IoTYPE_WRONLY;
4572 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4573 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4575 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4577 PL_statname = newSV(0); /* last filename we did stat on */
4579 Safefree(PL_osname);
4580 PL_osname = savepv(OSNAME);
4584 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4587 argc--,argv++; /* skip name of script */
4588 if (PL_doswitches) {
4589 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4593 if (argv[0][1] == '-' && !argv[0][2]) {
4597 if ((s = strchr(argv[0], '='))) {
4598 const char *const start_name = argv[0] + 1;
4599 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4600 TRUE, SVt_PV)), s + 1);
4603 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4606 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4607 GvMULTI_on(PL_argvgv);
4608 (void)gv_AVadd(PL_argvgv);
4609 av_clear(GvAVn(PL_argvgv));
4610 for (; argc > 0; argc--,argv++) {
4611 SV * const sv = newSVpv(argv[0],0);
4612 av_push(GvAVn(PL_argvgv),sv);
4613 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4614 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4617 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4618 (void)sv_utf8_decode(sv);
4624 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4629 PL_toptarget = newSV(0);
4630 sv_upgrade(PL_toptarget, SVt_PVFM);
4631 sv_setpvn(PL_toptarget, "", 0);
4632 PL_bodytarget = newSV(0);
4633 sv_upgrade(PL_bodytarget, SVt_PVFM);
4634 sv_setpvn(PL_bodytarget, "", 0);
4635 PL_formtarget = PL_bodytarget;
4639 init_argv_symbols(argc,argv);
4641 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4642 #ifdef MACOS_TRADITIONAL
4643 /* $0 is not majick on a Mac */
4644 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4646 sv_setpv(GvSV(tmpgv),PL_origfilename);
4647 magicname("0", "0", 1);
4650 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4652 bool env_is_not_environ;
4653 GvMULTI_on(PL_envgv);
4654 hv = GvHVn(PL_envgv);
4655 hv_magic(hv, NULL, PERL_MAGIC_env);
4657 #ifdef USE_ENVIRON_ARRAY
4658 /* Note that if the supplied env parameter is actually a copy
4659 of the global environ then it may now point to free'd memory
4660 if the environment has been modified since. To avoid this
4661 problem we treat env==NULL as meaning 'use the default'
4665 env_is_not_environ = env != environ;
4666 if (env_is_not_environ
4667 # ifdef USE_ITHREADS
4668 && PL_curinterp == aTHX
4675 char** origenv = environ;
4678 for (; *env; env++) {
4679 if (!(s = strchr(*env,'=')) || s == *env)
4681 #if defined(MSDOS) && !defined(DJGPP)
4686 sv = newSVpv(s+1, 0);
4687 (void)hv_store(hv, *env, s - *env, sv, 0);
4688 if (env_is_not_environ)
4690 if (origenv != environ) {
4691 /* realloc has shifted us */
4692 env = (env - origenv) + environ;
4697 #endif /* USE_ENVIRON_ARRAY */
4698 #endif /* !PERL_MICRO */
4701 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4702 SvREADONLY_off(GvSV(tmpgv));
4703 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4704 SvREADONLY_on(GvSV(tmpgv));
4706 #ifdef THREADS_HAVE_PIDS
4707 PL_ppid = (IV)getppid();
4710 /* touch @F array to prevent spurious warnings 20020415 MJD */
4712 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4714 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4715 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4716 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4720 S_init_perllib(pTHX)
4726 s = PerlEnv_getenv("PERL5LIB");
4728 * It isn't possible to delete an environment variable with
4729 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4730 * case we treat PERL5LIB as undefined if it has a zero-length value.
4732 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4733 if (s && *s != '\0')
4737 incpush(s, TRUE, TRUE, TRUE, FALSE);
4739 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4741 /* Treat PERL5?LIB as a possible search list logical name -- the
4742 * "natural" VMS idiom for a Unix path string. We allow each
4743 * element to be a set of |-separated directories for compatibility.
4747 if (my_trnlnm("PERL5LIB",buf,0))
4748 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4750 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4754 /* Use the ~-expanded versions of APPLLIB (undocumented),
4755 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4758 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4762 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4764 #ifdef MACOS_TRADITIONAL
4767 SV * privdir = newSV(0);
4768 char * macperl = PerlEnv_getenv("MACPERL");
4773 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4774 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4775 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4776 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4777 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4778 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4780 SvREFCNT_dec(privdir);
4783 incpush(":", FALSE, FALSE, TRUE, FALSE);
4786 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4789 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4791 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4795 /* sitearch is always relative to sitelib on Windows for
4796 * DLL-based path intuition to work correctly */
4797 # if !defined(WIN32)
4798 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4804 /* this picks up sitearch as well */
4805 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4807 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4811 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4812 /* Search for version-specific dirs below here */
4813 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4816 #ifdef PERL_VENDORARCH_EXP
4817 /* vendorarch is always relative to vendorlib on Windows for
4818 * DLL-based path intuition to work correctly */
4819 # if !defined(WIN32)
4820 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4824 #ifdef PERL_VENDORLIB_EXP
4826 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4828 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4832 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4833 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4836 #ifdef PERL_OTHERLIBDIRS
4837 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4841 incpush(".", FALSE, FALSE, TRUE, FALSE);
4842 #endif /* MACOS_TRADITIONAL */
4845 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4846 # define PERLLIB_SEP ';'
4849 # define PERLLIB_SEP '|'
4851 # if defined(MACOS_TRADITIONAL)
4852 # define PERLLIB_SEP ','
4854 # define PERLLIB_SEP ':'
4858 #ifndef PERLLIB_MANGLE
4859 # define PERLLIB_MANGLE(s,n) (s)
4862 /* Push a directory onto @INC if it exists.
4863 Generate a new SV if we do this, to save needing to copy the SV we push
4866 S_incpush_if_exists(pTHX_ SV *dir)
4870 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4871 S_ISDIR(tmpstatbuf.st_mode)) {
4872 av_push(GvAVn(PL_incgv), dir);
4879 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4884 const char *p = dir;
4889 if (addsubdirs || addoldvers) {
4893 /* Break at all separators */
4895 SV *libdir = newSV(0);
4898 /* skip any consecutive separators */
4900 while ( *p == PERLLIB_SEP ) {
4901 /* Uncomment the next line for PATH semantics */
4902 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4907 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4908 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4913 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4914 p = NULL; /* break out */
4916 #ifdef MACOS_TRADITIONAL
4917 if (!strchr(SvPVX(libdir), ':')) {
4920 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4922 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4923 sv_catpvs(libdir, ":");
4926 /* Do the if() outside the #ifdef to avoid warnings about an unused
4929 #ifdef PERL_RELOCATABLE_INC
4931 * Relocatable include entries are marked with a leading .../
4934 * 0: Remove that leading ".../"
4935 * 1: Remove trailing executable name (anything after the last '/')
4936 * from the perl path to give a perl prefix
4938 * While the @INC element starts "../" and the prefix ends with a real
4939 * directory (ie not . or ..) chop that real directory off the prefix
4940 * and the leading "../" from the @INC element. ie a logical "../"
4942 * Finally concatenate the prefix and the remainder of the @INC element
4943 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4944 * generates /usr/local/lib/perl5
4946 const char *libpath = SvPVX(libdir);
4947 STRLEN libpath_len = SvCUR(libdir);
4948 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4950 SV * const caret_X = get_sv("\030", 0);
4951 /* Going to use the SV just as a scratch buffer holding a C
4957 /* $^X is *the* source of taint if tainting is on, hence
4958 SvPOK() won't be true. */
4960 assert(SvPOKp(caret_X));
4961 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4962 /* Firstly take off the leading .../
4963 If all else fail we'll do the paths relative to the current
4965 sv_chop(libdir, libpath + 4);
4966 /* Don't use SvPV as we're intentionally bypassing taining,
4967 mortal copies that the mg_get of tainting creates, and
4968 corruption that seems to come via the save stack.
4969 I guess that the save stack isn't correctly set up yet. */
4970 libpath = SvPVX(libdir);
4971 libpath_len = SvCUR(libdir);
4973 /* This would work more efficiently with memrchr, but as it's
4974 only a GNU extension we'd need to probe for it and
4975 implement our own. Not hard, but maybe not worth it? */
4977 prefix = SvPVX(prefix_sv);
4978 lastslash = strrchr(prefix, '/');
4980 /* First time in with the *lastslash = '\0' we just wipe off
4981 the trailing /perl from (say) /usr/foo/bin/perl
4985 while ((*lastslash = '\0'), /* Do that, come what may. */
4986 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4987 && (lastslash = strrchr(prefix, '/')))) {
4988 if (lastslash[1] == '\0'
4989 || (lastslash[1] == '.'
4990 && (lastslash[2] == '/' /* ends "/." */
4991 || (lastslash[2] == '/'
4992 && lastslash[3] == '/' /* or "/.." */
4994 /* Prefix ends "/" or "/." or "/..", any of which
4995 are fishy, so don't do any more logical cleanup.
4999 /* Remove leading "../" from path */
5002 /* Next iteration round the loop removes the last
5003 directory name from prefix by writing a '\0' in
5004 the while clause. */
5006 /* prefix has been terminated with a '\0' to the correct
5007 length. libpath points somewhere into the libdir SV.
5008 We need to join the 2 with '/' and drop the result into
5010 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5011 SvREFCNT_dec(libdir);
5012 /* And this is the new libdir. */
5015 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5016 /* Need to taint reloccated paths if running set ID */
5017 SvTAINTED_on(libdir);
5020 SvREFCNT_dec(prefix_sv);
5025 * BEFORE pushing libdir onto @INC we may first push version- and
5026 * archname-specific sub-directories.
5028 if (addsubdirs || addoldvers) {
5029 #ifdef PERL_INC_VERSION_LIST
5030 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5031 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5032 const char * const *incver;
5038 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5040 while (unix[len-1] == '/') len--; /* Cosmetic */
5041 sv_usepvn(libdir,unix,len);
5044 PerlIO_printf(Perl_error_log,
5045 "Failed to unixify @INC element \"%s\"\n",
5049 #ifdef MACOS_TRADITIONAL
5050 #define PERL_AV_SUFFIX_FMT ""
5051 #define PERL_ARCH_FMT "%s:"
5052 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5054 #define PERL_AV_SUFFIX_FMT "/"
5055 #define PERL_ARCH_FMT "/%s"
5056 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5058 /* .../version/archname if -d .../version/archname */
5059 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5061 (int)PERL_REVISION, (int)PERL_VERSION,
5062 (int)PERL_SUBVERSION, ARCHNAME);
5063 subdir = S_incpush_if_exists(aTHX_ subdir);
5065 /* .../version if -d .../version */
5066 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5068 (int)PERL_REVISION, (int)PERL_VERSION,
5069 (int)PERL_SUBVERSION);
5070 subdir = S_incpush_if_exists(aTHX_ subdir);
5072 /* .../archname if -d .../archname */
5073 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5074 SVfARG(libdir), ARCHNAME);
5075 subdir = S_incpush_if_exists(aTHX_ subdir);
5079 #ifdef PERL_INC_VERSION_LIST
5081 for (incver = incverlist; *incver; incver++) {
5082 /* .../xxx if -d .../xxx */
5083 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5084 SVfARG(libdir), *incver);
5085 subdir = S_incpush_if_exists(aTHX_ subdir);
5091 /* finally push this lib directory on the end of @INC */
5092 av_push(GvAVn(PL_incgv), libdir);
5095 assert (SvREFCNT(subdir) == 1);
5096 SvREFCNT_dec(subdir);
5102 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5106 const line_t oldline = CopLINE(PL_curcop);
5112 while (av_len(paramList) >= 0) {
5113 cv = (CV*)av_shift(paramList);
5115 if (paramList == PL_beginav) {
5116 /* save PL_beginav for compiler */
5117 if (! PL_beginav_save)
5118 PL_beginav_save = newAV();
5119 av_push(PL_beginav_save, (SV*)cv);
5121 else if (paramList == PL_checkav) {
5122 /* save PL_checkav for compiler */
5123 if (! PL_checkav_save)
5124 PL_checkav_save = newAV();
5125 av_push(PL_checkav_save, (SV*)cv);
5127 else if (paramList == PL_unitcheckav) {
5128 /* save PL_unitcheckav for compiler */
5129 if (! PL_unitcheckav_save)
5130 PL_unitcheckav_save = newAV();
5131 av_push(PL_unitcheckav_save, (SV*)cv);
5142 PL_madskills |= 16384;
5147 PL_madskills &= ~16384;
5150 (void)SvPV_const(atsv, len);
5151 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5152 break; /* not really trying to run, so just wing it */
5154 PL_curcop = &PL_compiling;
5155 CopLINE_set(PL_curcop, oldline);
5156 if (paramList == PL_beginav)
5157 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5159 Perl_sv_catpvf(aTHX_ atsv,
5160 "%s failed--call queue aborted",
5161 paramList == PL_checkav ? "CHECK"
5162 : paramList == PL_initav ? "INIT"
5163 : paramList == PL_unitcheckav ? "UNITCHECK"
5165 while (PL_scopestack_ix > oldscope)
5168 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5175 /* my_exit() was called */
5176 while (PL_scopestack_ix > oldscope)
5179 PL_curstash = PL_defstash;
5180 PL_curcop = &PL_compiling;
5181 CopLINE_set(PL_curcop, oldline);
5183 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5184 return; /* not really trying to run, so just wing it */
5185 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5186 if (paramList == PL_beginav)
5187 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5189 Perl_croak(aTHX_ "%s failed--call queue aborted",
5190 paramList == PL_checkav ? "CHECK"
5191 : paramList == PL_initav ? "INIT"
5192 : paramList == PL_unitcheckav ? "UNITCHECK"
5199 PL_curcop = &PL_compiling;
5200 CopLINE_set(PL_curcop, oldline);
5203 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5212 Perl_my_exit(pTHX_ U32 status)
5215 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5216 (void*)thr, (unsigned long) status));
5225 STATUS_EXIT_SET(status);
5232 Perl_my_failure_exit(pTHX)
5236 /* We have been called to fall on our sword. The desired exit code
5237 * should be already set in STATUS_UNIX, but could be shifted over
5238 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5241 * If an error code has not been set, then force the issue.
5243 if (MY_POSIX_EXIT) {
5245 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5246 * the exit code when there isn't an error.
5249 if (STATUS_UNIX == 0)
5250 STATUS_UNIX_EXIT_SET(255);
5252 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5254 /* The exit code could have been set by $? or vmsish which
5255 * means that it may not be fatal. So convert
5256 * success/warning codes to fatal.
5258 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5259 STATUS_UNIX_EXIT_SET(255);
5263 /* Traditionally Perl on VMS always expects a Fatal Error. */
5264 if (vaxc$errno & 1) {
5266 /* So force success status to failure */
5267 if (STATUS_NATIVE & 1)
5272 STATUS_UNIX = EINTR; /* In case something cares */
5277 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5279 /* Encode the severity code */
5280 severity = STATUS_NATIVE & STS$M_SEVERITY;
5281 STATUS_UNIX = (severity ? severity : 1) << 8;
5283 /* Perl expects this to be a fatal error */
5284 if (severity != STS$K_SEVERE)
5293 STATUS_UNIX_SET(errno);
5295 exitstatus = STATUS_UNIX >> 8;
5296 if (exitstatus & 255)
5297 STATUS_UNIX_SET(exitstatus);
5299 STATUS_UNIX_SET(255);
5306 S_my_exit_jump(pTHX)
5311 SvREFCNT_dec(PL_e_script);
5315 POPSTACK_TO(PL_mainstack);
5323 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5326 const char * const p = SvPVX_const(PL_e_script);
5327 const char *nl = strchr(p, '\n');
5329 PERL_UNUSED_ARG(idx);
5330 PERL_UNUSED_ARG(maxlen);
5332 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5334 filter_del(read_e_script);
5337 sv_catpvn(buf_sv, p, nl-p);
5338 sv_chop(PL_e_script, nl);
5344 * c-indentation-style: bsd
5346 * indent-tabs-mode: t
5349 * ex: set ts=8 sts=4 sw=4 noet: