3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
175 PERL_SET_THX(my_perl);
179 #ifdef PERL_IMPLICIT_SYS
181 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
182 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
183 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
184 struct IPerlDir* ipD, struct IPerlSock* ipS,
185 struct IPerlProc* ipP)
187 PerlInterpreter *my_perl;
188 /* Newx() needs interpreter, so call malloc() instead */
189 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
190 S_init_tls_and_interp(my_perl);
191 Zero(my_perl, 1, PerlInterpreter);
201 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 =head1 Embedding Functions
210 =for apidoc perl_alloc
212 Allocates a new Perl interpreter. See L<perlembed>.
220 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 S_init_tls_and_interp(my_perl);
226 #ifndef PERL_TRACK_MEMPOOL
227 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
229 Zero(my_perl, 1, PerlInterpreter);
230 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
234 #endif /* PERL_IMPLICIT_SYS */
237 =for apidoc perl_construct
239 Initializes a new Perl interpreter. See L<perlembed>.
245 perl_construct(pTHXx)
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 if (destruct_level == 0){
797 DEBUG_P(debprofdump());
799 #if defined(PERLIO_LAYERS)
800 /* No more IO - including error messages ! */
801 PerlIO_cleanup(aTHX);
804 /* The exit() function will do everything that needs doing. */
808 /* jettison our possibly duplicated environment */
809 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
810 * so we certainly shouldn't free it here
813 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
814 if (environ != PL_origenviron && !PL_use_safe_putenv
816 /* only main thread can free environ[0] contents */
817 && PL_curinterp == aTHX
823 for (i = 0; environ[i]; i++)
824 safesysfree(environ[i]);
826 /* Must use safesysfree() when working with environ. */
827 safesysfree(environ);
829 environ = PL_origenviron;
832 #endif /* !PERL_MICRO */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
844 I32 i = AvFILLp(PL_regex_padav) + 1;
845 SV * const * const ary = AvARRAY(PL_regex_padav);
848 SV * const resv = ary[--i];
850 if (SvFLAGS(resv) & SVf_BREAK) {
851 /* this is PL_reg_curpm, already freed
852 * flag is set in regexec.c:S_regtry
854 SvFLAGS(resv) &= ~SVf_BREAK;
856 else if(SvREPADTMP(resv)) {
857 SvREPADTMP_off(resv);
859 else if(SvIOKp(resv)) {
860 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
865 SvREFCNT_dec(PL_regex_padav);
866 PL_regex_padav = NULL;
870 SvREFCNT_dec((SV*) PL_stashcache);
871 PL_stashcache = NULL;
873 /* loosen bonds of global variables */
876 (void)PerlIO_close(PL_rsfp);
880 /* Filters for program text */
881 SvREFCNT_dec(PL_rsfp_filters);
882 PL_rsfp_filters = NULL;
885 Safefree(PL_splitstr);
890 PL_preprocess = FALSE;
896 PL_doswitches = FALSE;
897 PL_dowarn = G_WARN_OFF;
898 PL_doextract = FALSE;
899 PL_sawampersand = FALSE; /* must save all match strings */
902 Safefree(PL_inplace);
904 SvREFCNT_dec(PL_patchlevel);
907 SvREFCNT_dec(PL_e_script);
913 /* magical thingies */
915 SvREFCNT_dec(PL_ofs_sv); /* $, */
918 SvREFCNT_dec(PL_ors_sv); /* $\ */
921 SvREFCNT_dec(PL_rs); /* $/ */
924 Safefree(PL_osname); /* $^O */
927 SvREFCNT_dec(PL_statname);
931 /* defgv, aka *_ should be taken care of elsewhere */
933 /* clean up after study() */
934 SvREFCNT_dec(PL_lastscream);
935 PL_lastscream = NULL;
936 Safefree(PL_screamfirst);
938 Safefree(PL_screamnext);
942 Safefree(PL_efloatbuf);
946 /* startup and shutdown function lists */
947 SvREFCNT_dec(PL_beginav);
948 SvREFCNT_dec(PL_beginav_save);
949 SvREFCNT_dec(PL_endav);
950 SvREFCNT_dec(PL_checkav);
951 SvREFCNT_dec(PL_checkav_save);
952 SvREFCNT_dec(PL_unitcheckav);
953 SvREFCNT_dec(PL_unitcheckav_save);
954 SvREFCNT_dec(PL_initav);
956 PL_beginav_save = NULL;
959 PL_checkav_save = NULL;
960 PL_unitcheckav = NULL;
961 PL_unitcheckav_save = NULL;
964 /* shortcuts just get cleared */
973 PL_last_in_gv = NULL;
981 PL_DBassertion = NULL;
986 SvREFCNT_dec(PL_argvout_stack);
987 PL_argvout_stack = NULL;
989 SvREFCNT_dec(PL_modglobal);
991 SvREFCNT_dec(PL_preambleav);
992 PL_preambleav = NULL;
993 SvREFCNT_dec(PL_subname);
995 SvREFCNT_dec(PL_linestr);
997 #ifdef PERL_USES_PL_PIDSTATUS
998 SvREFCNT_dec(PL_pidstatus);
1001 SvREFCNT_dec(PL_toptarget);
1002 PL_toptarget = NULL;
1003 SvREFCNT_dec(PL_bodytarget);
1004 PL_bodytarget = NULL;
1005 PL_formtarget = NULL;
1007 /* free locale stuff */
1008 #ifdef USE_LOCALE_COLLATE
1009 Safefree(PL_collation_name);
1010 PL_collation_name = NULL;
1013 #ifdef USE_LOCALE_NUMERIC
1014 Safefree(PL_numeric_name);
1015 PL_numeric_name = NULL;
1016 SvREFCNT_dec(PL_numeric_radix_sv);
1017 PL_numeric_radix_sv = NULL;
1020 /* clear utf8 character classes */
1021 SvREFCNT_dec(PL_utf8_alnum);
1022 SvREFCNT_dec(PL_utf8_alnumc);
1023 SvREFCNT_dec(PL_utf8_ascii);
1024 SvREFCNT_dec(PL_utf8_alpha);
1025 SvREFCNT_dec(PL_utf8_space);
1026 SvREFCNT_dec(PL_utf8_cntrl);
1027 SvREFCNT_dec(PL_utf8_graph);
1028 SvREFCNT_dec(PL_utf8_digit);
1029 SvREFCNT_dec(PL_utf8_upper);
1030 SvREFCNT_dec(PL_utf8_lower);
1031 SvREFCNT_dec(PL_utf8_print);
1032 SvREFCNT_dec(PL_utf8_punct);
1033 SvREFCNT_dec(PL_utf8_xdigit);
1034 SvREFCNT_dec(PL_utf8_mark);
1035 SvREFCNT_dec(PL_utf8_toupper);
1036 SvREFCNT_dec(PL_utf8_totitle);
1037 SvREFCNT_dec(PL_utf8_tolower);
1038 SvREFCNT_dec(PL_utf8_tofold);
1039 SvREFCNT_dec(PL_utf8_idstart);
1040 SvREFCNT_dec(PL_utf8_idcont);
1041 PL_utf8_alnum = NULL;
1042 PL_utf8_alnumc = NULL;
1043 PL_utf8_ascii = NULL;
1044 PL_utf8_alpha = NULL;
1045 PL_utf8_space = NULL;
1046 PL_utf8_cntrl = NULL;
1047 PL_utf8_graph = NULL;
1048 PL_utf8_digit = NULL;
1049 PL_utf8_upper = NULL;
1050 PL_utf8_lower = NULL;
1051 PL_utf8_print = NULL;
1052 PL_utf8_punct = NULL;
1053 PL_utf8_xdigit = NULL;
1054 PL_utf8_mark = NULL;
1055 PL_utf8_toupper = NULL;
1056 PL_utf8_totitle = NULL;
1057 PL_utf8_tolower = NULL;
1058 PL_utf8_tofold = NULL;
1059 PL_utf8_idstart = NULL;
1060 PL_utf8_idcont = NULL;
1062 if (!specialWARN(PL_compiling.cop_warnings))
1063 PerlMemShared_free(PL_compiling.cop_warnings);
1064 PL_compiling.cop_warnings = NULL;
1065 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1066 PL_compiling.cop_hints_hash = NULL;
1067 CopFILE_free(&PL_compiling);
1068 CopSTASH_free(&PL_compiling);
1070 /* Prepare to destruct main symbol table. */
1075 SvREFCNT_dec(PL_curstname);
1076 PL_curstname = NULL;
1078 /* clear queued errors */
1079 SvREFCNT_dec(PL_errors);
1083 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1084 if (PL_scopestack_ix != 0)
1085 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1086 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1087 (long)PL_scopestack_ix);
1088 if (PL_savestack_ix != 0)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1090 "Unbalanced saves: %ld more saves than restores\n",
1091 (long)PL_savestack_ix);
1092 if (PL_tmps_floor != -1)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1094 (long)PL_tmps_floor + 1);
1095 if (cxstack_ix != -1)
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1097 (long)cxstack_ix + 1);
1100 /* Now absolutely destruct everything, somehow or other, loops or no. */
1101 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1102 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1104 /* the 2 is for PL_fdpid and PL_strtab */
1105 while (PL_sv_count > 2 && sv_clean_all())
1108 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1109 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1110 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1111 SvFLAGS(PL_strtab) |= SVt_PVHV;
1113 AvREAL_off(PL_fdpid); /* no surviving entries */
1114 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1117 #ifdef HAVE_INTERP_INTERN
1121 /* Destruct the global string table. */
1123 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1124 * so that sv_free() won't fail on them.
1125 * Now that the global string table is using a single hunk of memory
1126 * for both HE and HEK, we either need to explicitly unshare it the
1127 * correct way, or actually free things here.
1130 const I32 max = HvMAX(PL_strtab);
1131 HE * const * const array = HvARRAY(PL_strtab);
1132 HE *hent = array[0];
1135 if (hent && ckWARN_d(WARN_INTERNAL)) {
1136 HE * const next = HeNEXT(hent);
1137 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1138 "Unbalanced string table refcount: (%ld) for \"%s\"",
1139 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1146 hent = array[riter];
1151 HvARRAY(PL_strtab) = 0;
1152 HvTOTALKEYS(PL_strtab) = 0;
1153 HvFILL(PL_strtab) = 0;
1155 SvREFCNT_dec(PL_strtab);
1158 /* free the pointer tables used for cloning */
1159 ptr_table_free(PL_ptr_table);
1160 PL_ptr_table = (PTR_TBL_t*)NULL;
1163 /* free special SVs */
1165 SvREFCNT(&PL_sv_yes) = 0;
1166 sv_clear(&PL_sv_yes);
1167 SvANY(&PL_sv_yes) = NULL;
1168 SvFLAGS(&PL_sv_yes) = 0;
1170 SvREFCNT(&PL_sv_no) = 0;
1171 sv_clear(&PL_sv_no);
1172 SvANY(&PL_sv_no) = NULL;
1173 SvFLAGS(&PL_sv_no) = 0;
1177 for (i=0; i<=2; i++) {
1178 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1179 sv_clear(PERL_DEBUG_PAD(i));
1180 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1181 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1185 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1186 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1188 #ifdef DEBUG_LEAKING_SCALARS
1189 if (PL_sv_count != 0) {
1194 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1195 svend = &sva[SvREFCNT(sva)];
1196 for (sv = sva + 1; sv < svend; ++sv) {
1197 if (SvTYPE(sv) != SVTYPEMASK) {
1198 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1200 " refcnt=%"UVuf pTHX__FORMAT "\n"
1201 "\tallocated at %s:%d %s %s%s\n",
1202 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1203 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1205 sv->sv_debug_inpad ? "for" : "by",
1206 sv->sv_debug_optype ?
1207 PL_op_name[sv->sv_debug_optype]: "(none)",
1208 sv->sv_debug_cloned ? " (cloned)" : ""
1210 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1211 Perl_dump_sv_child(aTHX_ sv);
1217 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1221 /* Wait for up to 4 seconds for child to terminate.
1222 This seems to be the least effort way of timing out on reaping
1224 struct timeval waitfor = {4, 0};
1225 int sock = PL_dumper_fd;
1229 FD_SET(sock, &rset);
1230 select(sock + 1, &rset, NULL, NULL, &waitfor);
1231 waitpid(child, &status, WNOHANG);
1239 #if defined(PERLIO_LAYERS)
1240 /* No more IO - including error messages ! */
1241 PerlIO_cleanup(aTHX);
1244 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1245 as currently layers use it rather than NULL as a marker
1246 for no arg - and will try and SvREFCNT_dec it.
1248 SvREFCNT(&PL_sv_undef) = 0;
1249 SvREADONLY_off(&PL_sv_undef);
1251 Safefree(PL_origfilename);
1252 PL_origfilename = NULL;
1253 Safefree(PL_reg_start_tmp);
1254 PL_reg_start_tmp = (char**)NULL;
1255 PL_reg_start_tmpl = 0;
1256 Safefree(PL_reg_curpm);
1257 Safefree(PL_reg_poscache);
1258 free_tied_hv_pool();
1259 Safefree(PL_op_mask);
1260 Safefree(PL_psig_ptr);
1261 PL_psig_ptr = (SV**)NULL;
1262 Safefree(PL_psig_name);
1263 PL_psig_name = (SV**)NULL;
1264 Safefree(PL_bitcount);
1266 Safefree(PL_psig_pend);
1267 PL_psig_pend = (int*)NULL;
1270 PL_tainting = FALSE;
1271 PL_taint_warn = FALSE;
1272 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1275 DEBUG_P(debprofdump());
1277 #ifdef USE_REENTRANT_API
1278 Perl_reentrant_free(aTHX);
1283 while (PL_regmatch_slab) {
1284 regmatch_slab *s = PL_regmatch_slab;
1285 PL_regmatch_slab = PL_regmatch_slab->next;
1289 /* As the absolutely last thing, free the non-arena SV for mess() */
1292 /* we know that type == SVt_PVMG */
1294 /* it could have accumulated taint magic */
1297 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1298 moremagic = mg->mg_moremagic;
1299 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1301 Safefree(mg->mg_ptr);
1305 /* we know that type >= SVt_PV */
1306 SvPV_free(PL_mess_sv);
1307 Safefree(SvANY(PL_mess_sv));
1308 Safefree(PL_mess_sv);
1315 =for apidoc perl_free
1317 Releases a Perl interpreter. See L<perlembed>.
1325 #ifdef PERL_TRACK_MEMPOOL
1328 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1329 * value as we're probably hunting memory leaks then
1331 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1332 if (!s || atoi(s) == 0) {
1333 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1334 thread at thread exit. */
1335 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1336 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1341 #if defined(WIN32) || defined(NETWARE)
1342 # if defined(PERL_IMPLICIT_SYS)
1345 void *host = nw_internal_host;
1347 void *host = w32_internal_host;
1349 PerlMem_free(aTHXx);
1351 nw_delete_internal_host(host);
1353 win32_delete_internal_host(host);
1357 PerlMem_free(aTHXx);
1360 PerlMem_free(aTHXx);
1364 #if defined(USE_ITHREADS)
1365 /* provide destructors to clean up the thread key when libperl is unloaded */
1366 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1368 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1369 #pragma fini "perl_fini"
1370 #elif defined(__sun) && !defined(__GNUC__)
1371 #pragma fini (perl_fini)
1375 #if defined(__GNUC__)
1376 __attribute__((destructor))
1386 #endif /* THREADS */
1389 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1392 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1393 PL_exitlist[PL_exitlistlen].fn = fn;
1394 PL_exitlist[PL_exitlistlen].ptr = ptr;
1398 #ifdef HAS_PROCSELFEXE
1399 /* This is a function so that we don't hold on to MAXPATHLEN
1400 bytes of stack longer than necessary
1403 S_procself_val(pTHX_ SV *sv, const char *arg0)
1405 char buf[MAXPATHLEN];
1406 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1408 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1409 includes a spurious NUL which will cause $^X to fail in system
1410 or backticks (this will prevent extensions from being built and
1411 many tests from working). readlink is not meant to add a NUL.
1412 Normal readlink works fine.
1414 if (len > 0 && buf[len-1] == '\0') {
1418 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1419 returning the text "unknown" from the readlink rather than the path
1420 to the executable (or returning an error from the readlink). Any valid
1421 path has a '/' in it somewhere, so use that to validate the result.
1422 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1424 if (len > 0 && memchr(buf, '/', len)) {
1425 sv_setpvn(sv,buf,len);
1431 #endif /* HAS_PROCSELFEXE */
1434 S_set_caret_X(pTHX) {
1436 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1438 #ifdef HAS_PROCSELFEXE
1439 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1442 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1444 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1451 =for apidoc perl_parse
1453 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1459 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1466 PERL_UNUSED_ARG(my_perl);
1468 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1471 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1472 setuid perl scripts securely.\n");
1473 #endif /* IAMSUID */
1476 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1477 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1478 * This MUST be done before any hash stores or fetches take place.
1479 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1480 * yourself, it is your responsibility to provide a good random seed!
1481 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1482 if (!PL_rehash_seed_set)
1483 PL_rehash_seed = get_hash_seed();
1485 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1487 if (s && (atoi(s) == 1))
1488 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1490 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1495 if (PL_origalen != 0) {
1496 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1499 /* Set PL_origalen be the sum of the contiguous argv[]
1500 * elements plus the size of the env in case that it is
1501 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1502 * as the maximum modifiable length of $0. In the worst case
1503 * the area we are able to modify is limited to the size of
1504 * the original argv[0]. (See below for 'contiguous', though.)
1506 const char *s = NULL;
1509 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1510 /* Do the mask check only if the args seem like aligned. */
1512 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1514 /* See if all the arguments are contiguous in memory. Note
1515 * that 'contiguous' is a loose term because some platforms
1516 * align the argv[] and the envp[]. If the arguments look
1517 * like non-aligned, assume that they are 'strictly' or
1518 * 'traditionally' contiguous. If the arguments look like
1519 * aligned, we just check that they are within aligned
1520 * PTRSIZE bytes. As long as no system has something bizarre
1521 * like the argv[] interleaved with some other data, we are
1522 * fine. (Did I just evoke Murphy's Law?) --jhi */
1523 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1525 for (i = 1; i < PL_origargc; i++) {
1526 if ((PL_origargv[i] == s + 1
1528 || PL_origargv[i] == s + 2
1533 (PL_origargv[i] > s &&
1535 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1545 /* Can we grab env area too to be used as the area for $0? */
1546 if (s && PL_origenviron) {
1547 if ((PL_origenviron[0] == s + 1
1549 || (PL_origenviron[0] == s + 9 && (s += 8))
1554 (PL_origenviron[0] > s &&
1555 PL_origenviron[0] <=
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1560 s = PL_origenviron[0];
1563 my_setenv("NoNe SuCh", NULL);
1564 /* Force copy of environment. */
1565 for (i = 1; PL_origenviron[i]; i++) {
1566 if (PL_origenviron[i] == s + 1
1569 (PL_origenviron[i] > s &&
1570 PL_origenviron[i] <=
1571 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1574 s = PL_origenviron[i];
1582 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1587 /* Come here if running an undumped a.out. */
1589 PL_origfilename = savepv(argv[0]);
1590 PL_do_undump = FALSE;
1591 cxstack_ix = -1; /* start label stack again */
1593 assert (!PL_tainted);
1595 S_set_caret_X(aTHX);
1597 init_postdump_symbols(argc,argv,env);
1602 op_free(PL_main_root);
1603 PL_main_root = NULL;
1605 PL_main_start = NULL;
1606 SvREFCNT_dec(PL_main_cv);
1610 oldscope = PL_scopestack_ix;
1611 PL_dowarn = G_WARN_OFF;
1616 parse_body(env,xsinit);
1618 call_list(oldscope, PL_unitcheckav);
1620 call_list(oldscope, PL_checkav);
1627 /* my_exit() was called */
1628 while (PL_scopestack_ix > oldscope)
1631 PL_curstash = PL_defstash;
1633 call_list(oldscope, PL_unitcheckav);
1635 call_list(oldscope, PL_checkav);
1639 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1648 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1651 int argc = PL_origargc;
1652 char **argv = PL_origargv;
1653 const char *scriptname = NULL;
1654 VOL bool dosearch = FALSE;
1655 const char *validarg = "";
1658 const char *cddir = NULL;
1659 #ifdef USE_SITECUSTOMIZE
1660 bool minus_f = FALSE;
1663 sv_setpvn(PL_linestr,"",0);
1664 sv = newSVpvs(""); /* first used for -I flags */
1668 for (argc--,argv++; argc > 0; argc--,argv++) {
1669 if (argv[0][0] != '-' || !argv[0][1])
1673 validarg = " PHOOEY ";
1677 * Can we rely on the kernel to start scripts with argv[1] set to
1678 * contain all #! line switches (the whole line)? (argv[0] is set to
1679 * the interpreter name, argv[2] to the script name; argv[3] and
1680 * above may contain other arguments.)
1687 #ifndef PERL_STRICT_CR
1712 if ((s = moreswitches(s)))
1717 CHECK_MALLOC_TOO_LATE_FOR('t');
1718 if( !PL_tainting ) {
1719 PL_taint_warn = TRUE;
1725 CHECK_MALLOC_TOO_LATE_FOR('T');
1727 PL_taint_warn = FALSE;
1735 #ifdef MACOS_TRADITIONAL
1736 /* ignore -e for Dev:Pseudo argument */
1737 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1740 forbid_setid('e', -1);
1742 PL_e_script = newSVpvs("");
1743 filter_add(read_e_script, NULL);
1746 sv_catpv(PL_e_script, s);
1748 sv_catpv(PL_e_script, argv[1]);
1752 Perl_croak(aTHX_ "No code specified for -%c", *s);
1753 sv_catpvs(PL_e_script, "\n");
1757 #ifdef USE_SITECUSTOMIZE
1763 case 'I': /* -I handled both here and in moreswitches() */
1764 forbid_setid('I', -1);
1765 if (!*++s && (s=argv[1]) != NULL) {
1769 STRLEN len = strlen(s);
1770 const char * const p = savepvn(s, len);
1771 incpush(p, TRUE, TRUE, FALSE, FALSE);
1772 sv_catpvs(sv, "-I");
1773 sv_catpvn(sv, p, len);
1778 Perl_croak(aTHX_ "No directory specified for -I");
1781 forbid_setid('P', -1);
1782 PL_preprocess = TRUE;
1786 forbid_setid('S', -1);
1795 PL_preambleav = newAV();
1796 av_push(PL_preambleav,
1797 newSVpvs("use Config;"));
1801 opts_prog = newSVpvs("print Config::myconfig(),");
1803 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1805 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1807 opts = SvCUR(opts_prog);
1809 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1813 # ifdef DEBUG_LEAKING_SCALARS
1814 " DEBUG_LEAKING_SCALARS"
1816 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1817 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1819 # ifdef FAKE_THREADS
1822 # ifdef MULTIPLICITY
1831 # ifdef PERL_DONT_CREATE_GVSV
1832 " PERL_DONT_CREATE_GVSV"
1834 # ifdef PERL_GLOBAL_STRUCT
1835 " PERL_GLOBAL_STRUCT"
1837 # ifdef PERL_IMPLICIT_CONTEXT
1838 " PERL_IMPLICIT_CONTEXT"
1840 # ifdef PERL_IMPLICIT_SYS
1841 " PERL_IMPLICIT_SYS"
1846 # ifdef PERL_MALLOC_WRAP
1849 # ifdef PERL_NEED_APPCTX
1852 # ifdef PERL_NEED_TIMESBASE
1853 " PERL_NEED_TIMESBASE"
1855 # ifdef PERL_OLD_COPY_ON_WRITE
1856 " PERL_OLD_COPY_ON_WRITE"
1858 # ifdef PERL_TRACK_MEMPOOL
1859 " PERL_TRACK_MEMPOOL"
1861 # ifdef PERL_USE_SAFE_PUTENV
1862 " PERL_USE_SAFE_PUTENV"
1864 #ifdef PERL_USES_PL_PIDSTATUS
1865 " PERL_USES_PL_PIDSTATUS"
1867 # ifdef PL_OP_SLAB_ALLOC
1870 # ifdef THREADS_HAVE_PIDS
1871 " THREADS_HAVE_PIDS"
1873 # ifdef USE_64_BIT_ALL
1876 # ifdef USE_64_BIT_INT
1879 # ifdef USE_ITHREADS
1882 # ifdef USE_LARGE_FILES
1885 # ifdef USE_LONG_DOUBLE
1891 # ifdef USE_REENTRANT_API
1892 " USE_REENTRANT_API"
1897 # ifdef USE_SITECUSTOMIZE
1898 " USE_SITECUSTOMIZE"
1905 while (SvCUR(opts_prog) > opts+76) {
1906 /* find last space after "options: " and before col 76
1910 char * const pv = SvPV_nolen(opts_prog);
1911 const char c = pv[opts+76];
1913 space = strrchr(pv+opts+26, ' ');
1915 if (!space) break; /* "Can't happen" */
1917 /* break the line before that space */
1920 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1921 STR_WITH_LEN("\\n "));
1924 sv_catpvs(opts_prog,"\\n\",");
1926 #if defined(LOCAL_PATCH_COUNT)
1927 if (LOCAL_PATCH_COUNT > 0) {
1929 sv_catpvs(opts_prog,
1930 "\" Locally applied patches:\\n\",");
1931 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1932 if (PL_localpatches[i])
1933 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1934 0, PL_localpatches[i], 0);
1938 Perl_sv_catpvf(aTHX_ opts_prog,
1939 "\" Built under %s\\n\"",OSNAME);
1942 Perl_sv_catpvf(aTHX_ opts_prog,
1943 ",\" Compiled at %s %s\\n\"",__DATE__,
1946 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1950 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1951 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1952 "sort grep {/^PERL/} keys %ENV; ");
1954 sv_catpvs(opts_prog,
1955 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1957 sv_catpvs(opts_prog,
1958 "print \" \\%ENV:\\n @env\\n\" if @env;"
1959 "print \" \\@INC:\\n @INC\\n\";");
1963 opts_prog = Perl_newSVpvf(aTHX_
1964 "Config::config_vars(qw%c%s%c)",
1968 av_push(PL_preambleav, opts_prog);
1969 /* don't look for script or read stdin */
1970 scriptname = BIT_BUCKET;
1974 PL_doextract = TRUE;
1982 if (!*++s || isSPACE(*s)) {
1986 /* catch use of gnu style long options */
1987 if (strEQ(s, "version")) {
1991 if (strEQ(s, "help")) {
1998 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2004 #ifndef SECURE_INTERNAL_GETENV
2007 (s = PerlEnv_getenv("PERL5OPT")))
2009 const char *popt = s;
2012 if (*s == '-' && *(s+1) == 'T') {
2013 CHECK_MALLOC_TOO_LATE_FOR('T');
2015 PL_taint_warn = FALSE;
2018 char *popt_copy = NULL;
2031 if (!strchr("CDIMUdmtwA", *s))
2032 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2036 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2037 s = popt_copy + (s - popt);
2038 d = popt_copy + (d - popt);
2045 if( !PL_tainting ) {
2046 PL_taint_warn = TRUE;
2056 #ifdef USE_SITECUSTOMIZE
2059 PL_preambleav = newAV();
2060 av_unshift(PL_preambleav, 1);
2061 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2065 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2066 PL_compiling.cop_warnings
2067 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
2071 scriptname = argv[0];
2074 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2076 else if (scriptname == NULL) {
2078 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2084 /* Set $^X early so that it can be used for relocatable paths in @INC */
2085 assert (!PL_tainted);
2087 S_set_caret_X(aTHX);
2094 = open_script(scriptname, dosearch, sv, &suidscript);
2096 validate_suid(validarg, scriptname, fdscript, suidscript);
2099 # if defined(SIGCHLD) || defined(SIGCLD)
2102 # define SIGCHLD SIGCLD
2104 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2105 if (sigstate == (Sighandler_t) SIG_IGN) {
2106 if (ckWARN(WARN_SIGNAL))
2107 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2108 "Can't ignore signal CHLD, forcing to default");
2109 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2116 #ifdef MACOS_TRADITIONAL
2117 || gMacPerl_AlwaysExtract
2121 /* This will croak if suidscript is >= 0, as -x cannot be used with
2123 forbid_setid('x', suidscript);
2124 /* Hence you can't get here if suidscript >= 0 */
2127 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2128 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2132 PL_main_cv = PL_compcv = (CV*)newSV(0);
2133 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2134 CvUNIQUE_on(PL_compcv);
2136 CvPADLIST(PL_compcv) = pad_new(0);
2139 boot_core_UNIVERSAL();
2140 boot_core_xsutils();
2143 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2145 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2151 # ifdef HAS_SOCKS5_INIT
2152 socks5_init(argv[0]);
2158 init_predump_symbols();
2159 /* init_postdump_symbols not currently designed to be called */
2160 /* more than once (ENV isn't cleared first, for example) */
2161 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2163 init_postdump_symbols(argc,argv,env);
2165 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2166 * or explicitly in some platforms.
2167 * locale.c:Perl_init_i18nl10n() if the environment
2168 * look like the user wants to use UTF-8. */
2169 #if defined(__SYMBIAN32__)
2170 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2173 /* Requires init_predump_symbols(). */
2174 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2179 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2180 * and the default open disciplines. */
2181 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2182 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2184 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2185 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2186 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2188 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2189 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2190 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2192 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2193 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2194 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2196 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2197 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2200 sv_setpvn(sv, ":utf8\0:utf8", 11);
2202 sv_setpvn(sv, ":utf8\0", 6);
2205 sv_setpvn(sv, "\0:utf8", 6);
2211 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2212 if (strEQ(s, "unsafe"))
2213 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2214 else if (strEQ(s, "safe"))
2215 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2217 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2221 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2225 PL_xmlfp = PerlIO_stdout();
2227 PL_xmlfp = PerlIO_open(s, "w");
2229 Perl_croak(aTHX_ "Can't open %s", s);
2231 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2233 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2234 PL_madskills = atoi(s);
2235 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2241 /* now parse the script */
2243 SETERRNO(0,SS_NORMAL);
2245 #ifdef MACOS_TRADITIONAL
2246 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2248 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2250 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2251 MacPerl_MPWFileName(PL_origfilename));
2255 if (yyparse() || PL_error_count) {
2257 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2259 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2264 CopLINE_set(PL_curcop, 0);
2265 PL_curstash = PL_defstash;
2266 PL_preprocess = FALSE;
2268 SvREFCNT_dec(PL_e_script);
2276 SAVECOPFILE(PL_curcop);
2277 SAVECOPLINE(PL_curcop);
2278 gv_check(PL_defstash);
2285 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2286 dump_mstats("after compilation:");
2295 =for apidoc perl_run
2297 Tells a Perl interpreter to run. See L<perlembed>.
2310 PERL_UNUSED_ARG(my_perl);
2312 oldscope = PL_scopestack_ix;
2320 cxstack_ix = -1; /* start context stack again */
2322 case 0: /* normal completion */
2326 case 2: /* my_exit() */
2327 while (PL_scopestack_ix > oldscope)
2330 PL_curstash = PL_defstash;
2331 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2332 PL_endav && !PL_minus_c)
2333 call_list(oldscope, PL_endav);
2335 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2336 dump_mstats("after execution: ");
2342 POPSTACK_TO(PL_mainstack);
2345 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2357 S_run_body(pTHX_ I32 oldscope)
2360 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2361 PL_sawampersand ? "Enabling" : "Omitting"));
2363 if (!PL_restartop) {
2367 exit(0); /* less likely to core dump than my_exit(0) */
2370 DEBUG_x(dump_all());
2373 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2375 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2379 #ifdef MACOS_TRADITIONAL
2380 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2381 (gMacPerl_ErrorFormat ? "# " : ""),
2382 MacPerl_MPWFileName(PL_origfilename));
2384 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2388 if (PERLDB_SINGLE && PL_DBsingle)
2389 sv_setiv(PL_DBsingle, 1);
2391 call_list(oldscope, PL_initav);
2397 PL_op = PL_restartop;
2401 else if (PL_main_start) {
2402 CvDEPTH(PL_main_cv) = 1;
2403 PL_op = PL_main_start;
2411 =head1 SV Manipulation Functions
2413 =for apidoc p||get_sv
2415 Returns the SV of the specified Perl scalar. If C<create> is set and the
2416 Perl variable does not exist then it will be created. If C<create> is not
2417 set and the variable does not exist then NULL is returned.
2423 Perl_get_sv(pTHX_ const char *name, I32 create)
2426 gv = gv_fetchpv(name, create, SVt_PV);
2433 =head1 Array Manipulation Functions
2435 =for apidoc p||get_av
2437 Returns the AV of the specified Perl array. If C<create> is set and the
2438 Perl variable does not exist then it will be created. If C<create> is not
2439 set and the variable does not exist then NULL is returned.
2445 Perl_get_av(pTHX_ const char *name, I32 create)
2447 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2456 =head1 Hash Manipulation Functions
2458 =for apidoc p||get_hv
2460 Returns the HV of the specified Perl hash. If C<create> is set and the
2461 Perl variable does not exist then it will be created. If C<create> is not
2462 set and the variable does not exist then NULL is returned.
2468 Perl_get_hv(pTHX_ const char *name, I32 create)
2470 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2479 =head1 CV Manipulation Functions
2481 =for apidoc p||get_cv
2483 Returns the CV of the specified Perl subroutine. If C<create> is set and
2484 the Perl subroutine does not exist then it will be declared (which has the
2485 same effect as saying C<sub name;>). If C<create> is not set and the
2486 subroutine does not exist then NULL is returned.
2492 Perl_get_cv(pTHX_ const char *name, I32 create)
2494 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2495 /* XXX unsafe for threads if eval_owner isn't held */
2496 /* XXX this is probably not what they think they're getting.
2497 * It has the same effect as "sub name;", i.e. just a forward
2499 if (create && !GvCVu(gv))
2500 return newSUB(start_subparse(FALSE, 0),
2501 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2508 /* Be sure to refetch the stack pointer after calling these routines. */
2512 =head1 Callback Functions
2514 =for apidoc p||call_argv
2516 Performs a callback to the specified Perl sub. See L<perlcall>.
2522 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2524 /* See G_* flags in cop.h */
2525 /* null terminated arg list */
2533 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2538 return call_pv(sub_name, flags);
2542 =for apidoc p||call_pv
2544 Performs a callback to the specified Perl sub. See L<perlcall>.
2550 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2551 /* name of the subroutine */
2552 /* See G_* flags in cop.h */
2554 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2558 =for apidoc p||call_method
2560 Performs a callback to the specified Perl method. The blessed object must
2561 be on the stack. See L<perlcall>.
2567 Perl_call_method(pTHX_ const char *methname, I32 flags)
2568 /* name of the subroutine */
2569 /* See G_* flags in cop.h */
2571 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2574 /* May be called with any of a CV, a GV, or an SV containing the name. */
2576 =for apidoc p||call_sv
2578 Performs a callback to the Perl sub whose name is in the SV. See
2585 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2586 /* See G_* flags in cop.h */
2589 LOGOP myop; /* fake syntax tree node */
2594 bool oldcatch = CATCH_GET;
2596 OP* const oldop = PL_op;
2599 if (flags & G_DISCARD) {
2604 Zero(&myop, 1, LOGOP);
2605 myop.op_next = NULL;
2606 if (!(flags & G_NOARGS))
2607 myop.op_flags |= OPf_STACKED;
2608 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2609 (flags & G_ARRAY) ? OPf_WANT_LIST :
2614 EXTEND(PL_stack_sp, 1);
2615 *++PL_stack_sp = sv;
2617 oldscope = PL_scopestack_ix;
2619 if (PERLDB_SUB && PL_curstash != PL_debstash
2620 /* Handle first BEGIN of -d. */
2621 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2622 /* Try harder, since this may have been a sighandler, thus
2623 * curstash may be meaningless. */
2624 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2625 && !(flags & G_NODEBUG))
2626 PL_op->op_private |= OPpENTERSUB_DB;
2628 if (flags & G_METHOD) {
2629 Zero(&method_op, 1, UNOP);
2630 method_op.op_next = PL_op;
2631 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2632 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2633 PL_op = (OP*)&method_op;
2636 if (!(flags & G_EVAL)) {
2638 CALL_BODY_SUB((OP*)&myop);
2639 retval = PL_stack_sp - (PL_stack_base + oldmark);
2640 CATCH_SET(oldcatch);
2643 myop.op_other = (OP*)&myop;
2645 create_eval_scope(flags|G_FAKINGEVAL);
2653 CALL_BODY_SUB((OP*)&myop);
2654 retval = PL_stack_sp - (PL_stack_base + oldmark);
2655 if (!(flags & G_KEEPERR))
2656 sv_setpvn(ERRSV,"",0);
2662 /* my_exit() was called */
2663 PL_curstash = PL_defstash;
2666 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2667 Perl_croak(aTHX_ "Callback called exit");
2672 PL_op = PL_restartop;
2676 PL_stack_sp = PL_stack_base + oldmark;
2677 if (flags & G_ARRAY)
2681 *++PL_stack_sp = &PL_sv_undef;
2686 if (PL_scopestack_ix > oldscope)
2687 delete_eval_scope();
2691 if (flags & G_DISCARD) {
2692 PL_stack_sp = PL_stack_base + oldmark;
2701 /* Eval a string. The G_EVAL flag is always assumed. */
2704 =for apidoc p||eval_sv
2706 Tells Perl to C<eval> the string in the SV.
2712 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2714 /* See G_* flags in cop.h */
2718 UNOP myop; /* fake syntax tree node */
2719 VOL I32 oldmark = SP - PL_stack_base;
2722 OP* const oldop = PL_op;
2725 if (flags & G_DISCARD) {
2732 Zero(PL_op, 1, UNOP);
2733 EXTEND(PL_stack_sp, 1);
2734 *++PL_stack_sp = sv;
2736 if (!(flags & G_NOARGS))
2737 myop.op_flags = OPf_STACKED;
2738 myop.op_next = NULL;
2739 myop.op_type = OP_ENTEREVAL;
2740 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2741 (flags & G_ARRAY) ? OPf_WANT_LIST :
2743 if (flags & G_KEEPERR)
2744 myop.op_flags |= OPf_SPECIAL;
2746 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2747 * before a PUSHEVAL, which corrupts the stack after a croak */
2748 TAINT_PROPER("eval_sv()");
2754 CALL_BODY_EVAL((OP*)&myop);
2755 retval = PL_stack_sp - (PL_stack_base + oldmark);
2756 if (!(flags & G_KEEPERR))
2757 sv_setpvn(ERRSV,"",0);
2763 /* my_exit() was called */
2764 PL_curstash = PL_defstash;
2767 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2768 Perl_croak(aTHX_ "Callback called exit");
2773 PL_op = PL_restartop;
2777 PL_stack_sp = PL_stack_base + oldmark;
2778 if (flags & G_ARRAY)
2782 *++PL_stack_sp = &PL_sv_undef;
2788 if (flags & G_DISCARD) {
2789 PL_stack_sp = PL_stack_base + oldmark;
2799 =for apidoc p||eval_pv
2801 Tells Perl to C<eval> the given string and return an SV* result.
2807 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2811 SV* sv = newSVpv(p, 0);
2813 eval_sv(sv, G_SCALAR);
2820 if (croak_on_error && SvTRUE(ERRSV)) {
2821 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2827 /* Require a module. */
2830 =head1 Embedding Functions
2832 =for apidoc p||require_pv
2834 Tells Perl to C<require> the file named by the string argument. It is
2835 analogous to the Perl code C<eval "require '$file'">. It's even
2836 implemented that way; consider using load_module instead.
2841 Perl_require_pv(pTHX_ const char *pv)
2846 PUSHSTACKi(PERLSI_REQUIRE);
2848 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2849 eval_sv(sv_2mortal(sv), G_DISCARD);
2855 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2857 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2860 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2864 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2866 /* This message really ought to be max 23 lines.
2867 * Removed -h because the user already knows that option. Others? */
2869 static const char * const usage_msg[] = {
2870 "-0[octal] specify record separator (\\0, if no argument)",
2871 "-A[mod][=pattern] activate all/given assertions",
2872 "-a autosplit mode with -n or -p (splits $_ into @F)",
2873 "-C[number/list] enables the listed Unicode features",
2874 "-c check syntax only (runs BEGIN and CHECK blocks)",
2875 "-d[:debugger] run program under debugger",
2876 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2877 "-e program one line of program (several -e's allowed, omit programfile)",
2878 "-E program like -e, but enables all optional features",
2879 "-f don't do $sitelib/sitecustomize.pl at startup",
2880 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2881 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2882 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2883 "-l[octal] enable line ending processing, specifies line terminator",
2884 "-[mM][-]module execute \"use/no module...\" before executing program",
2885 "-n assume \"while (<>) { ... }\" loop around program",
2886 "-p assume loop like -n but print line also, like sed",
2887 "-P run program through C preprocessor before compilation",
2888 "-s enable rudimentary parsing for switches after programfile",
2889 "-S look for programfile using PATH environment variable",
2890 "-t enable tainting warnings",
2891 "-T enable tainting checks",
2892 "-u dump core after parsing program",
2893 "-U allow unsafe operations",
2894 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2895 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2896 "-w enable many useful warnings (RECOMMENDED)",
2897 "-W enable all warnings",
2898 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2899 "-X disable all warnings",
2903 const char * const *p = usage_msg;
2905 PerlIO_printf(PerlIO_stdout(),
2906 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2909 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2912 /* convert a string of -D options (or digits) into an int.
2913 * sets *s to point to the char after the options */
2917 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2919 static const char * const usage_msgd[] = {
2920 " Debugging flag values: (see also -d)",
2921 " p Tokenizing and parsing (with v, displays parse stack)",
2922 " s Stack snapshots (with v, displays all stacks)",
2923 " l Context (loop) stack processing",
2924 " t Trace execution",
2925 " o Method and overloading resolution",
2926 " c String/numeric conversions",
2927 " P Print profiling info, preprocessor command for -P, source file input state",
2928 " m Memory allocation",
2929 " f Format processing",
2930 " r Regular expression parsing and execution",
2931 " x Syntax tree dump",
2932 " u Tainting checks",
2933 " H Hash dump -- usurps values()",
2934 " X Scratchpad allocation",
2936 " S Thread synchronization",
2938 " R Include reference counts of dumped variables (eg when using -Ds)",
2939 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2940 " v Verbose: use in conjunction with other flags",
2942 " A Consistency checks on internal structures",
2943 " q quiet - currently only suppresses the 'EXECUTING' message",
2948 /* if adding extra options, remember to update DEBUG_MASK */
2949 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2951 for (; isALNUM(**s); (*s)++) {
2952 const char * const d = strchr(debopts,**s);
2954 i |= 1 << (d - debopts);
2955 else if (ckWARN_d(WARN_DEBUGGING))
2956 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2957 "invalid option -D%c, use -D'' to see choices\n", **s);
2960 else if (isDIGIT(**s)) {
2962 for (; isALNUM(**s); (*s)++) ;
2964 else if (givehelp) {
2965 const char *const *p = usage_msgd;
2966 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2969 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2970 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2971 "-Dp not implemented on this platform\n");
2977 /* This routine handles any switches that can be given during run */
2980 Perl_moreswitches(pTHX_ char *s)
2991 SvREFCNT_dec(PL_rs);
2992 if (s[1] == 'x' && s[2]) {
2993 const char *e = s+=2;
2999 flags = PERL_SCAN_SILENT_ILLDIGIT;
3000 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3001 if (s + numlen < e) {
3002 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3006 PL_rs = newSVpvs("");
3007 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3008 tmps = (U8*)SvPVX(PL_rs);
3009 uvchr_to_utf8(tmps, rschar);
3010 SvCUR_set(PL_rs, UNISKIP(rschar));
3015 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3016 if (rschar & ~((U8)~0))
3017 PL_rs = &PL_sv_undef;
3018 else if (!rschar && numlen >= 2)
3019 PL_rs = newSVpvs("");
3021 char ch = (char)rschar;
3022 PL_rs = newSVpvn(&ch, 1);
3025 sv_setsv(get_sv("/", TRUE), PL_rs);
3030 PL_unicode = parse_unicode_opts( (const char **)&s );
3031 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3037 while (*s && !isSPACE(*s)) ++s;
3038 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3049 forbid_setid('d', -1);
3052 /* -dt indicates to the debugger that threads will be used */
3053 if (*s == 't' && !isALNUM(s[1])) {
3055 my_setenv("PERL5DB_THREADED", "1");
3058 /* The following permits -d:Mod to accepts arguments following an =
3059 in the fashion that -MSome::Mod does. */
3060 if (*s == ':' || *s == '=') {
3062 SV * const sv = newSVpvs("use Devel::");
3064 /* We now allow -d:Module=Foo,Bar */
3065 while(isALNUM(*s) || *s==':') ++s;
3067 sv_catpv(sv, start);
3069 sv_catpvn(sv, start, s-start);
3070 /* Don't use NUL as q// delimiter here, this string goes in the
3072 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3075 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3078 PL_perldb = PERLDB_ALL;
3085 forbid_setid('D', -1);
3087 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3088 #else /* !DEBUGGING */
3089 if (ckWARN_d(WARN_DEBUGGING))
3090 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3091 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3092 for (s++; isALNUM(*s); s++) ;
3097 usage(PL_origargv[0]);
3100 Safefree(PL_inplace);
3101 #if defined(__CYGWIN__) /* do backup extension automagically */
3102 if (*(s+1) == '\0') {
3103 PL_inplace = savepvs(".bak");
3106 #endif /* __CYGWIN__ */
3108 const char * const start = ++s;
3109 while (*s && !isSPACE(*s))
3112 PL_inplace = savepvn(start, s - start);
3116 if (*s == '-') /* Additional switches on #! line. */
3120 case 'I': /* -I handled both here and in parse_body() */
3121 forbid_setid('I', -1);
3123 while (*s && isSPACE(*s))
3128 /* ignore trailing spaces (possibly followed by other switches) */
3130 for (e = p; *e && !isSPACE(*e); e++) ;
3134 } while (*p && *p != '-');
3135 e = savepvn(s, e-s);
3136 incpush(e, TRUE, TRUE, FALSE, FALSE);
3143 Perl_croak(aTHX_ "No directory specified for -I");
3149 SvREFCNT_dec(PL_ors_sv);
3155 PL_ors_sv = newSVpvs("\n");
3156 numlen = 3 + (*s == '0');
3157 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3161 if (RsPARA(PL_rs)) {
3162 PL_ors_sv = newSVpvs("\n\n");
3165 PL_ors_sv = newSVsv(PL_rs);
3170 forbid_setid('A', -1);
3172 PL_preambleav = newAV();
3175 char * const start = s;
3176 SV * const sv = newSVpvs("use assertions::activate");
3177 while(isALNUM(*s) || *s == ':') ++s;
3179 sv_catpvs(sv, "::");
3180 sv_catpvn(sv, start, s-start);
3183 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3186 else if (*s != '\0') {
3187 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3189 av_push(PL_preambleav, sv);
3193 forbid_setid('M', -1); /* XXX ? */
3196 forbid_setid('m', -1); /* XXX ? */
3200 const char *use = "use ";
3201 /* -M-foo == 'no foo' */
3202 /* Leading space on " no " is deliberate, to make both
3203 possibilities the same length. */
3204 if (*s == '-') { use = " no "; ++s; }
3205 sv = newSVpvn(use,4);
3207 /* We allow -M'Module qw(Foo Bar)' */
3208 while(isALNUM(*s) || *s==':') ++s;
3210 sv_catpv(sv, start);
3211 if (*(start-1) == 'm') {
3213 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3214 sv_catpvs( sv, " ()");
3218 Perl_croak(aTHX_ "Module name required with -%c option",
3220 sv_catpvn(sv, start, s-start);
3221 sv_catpvs(sv, " split(/,/,q");
3222 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3224 sv_catpvs(sv, "\0)");
3228 PL_preambleav = newAV();
3229 av_push(PL_preambleav, sv);
3232 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3243 forbid_setid('s', -1);
3244 PL_doswitches = TRUE;
3258 #ifdef MACOS_TRADITIONAL
3259 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3261 PL_do_undump = TRUE;
3269 if (!sv_derived_from(PL_patchlevel, "version"))
3270 upg_version(PL_patchlevel);
3272 PerlIO_printf(PerlIO_stdout(),
3273 Perl_form(aTHX_ "\nThis is perl, %"SVf
3274 #ifdef PERL_PATCHNUM
3275 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3278 (void*)vstringify(PL_patchlevel),
3281 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3282 PerlIO_printf(PerlIO_stdout(),
3283 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3284 vstringify(PL_patchlevel)));
3285 PerlIO_printf(PerlIO_stdout(),
3286 Perl_form(aTHX_ " built under %s at %s %s\n",
3287 OSNAME, __DATE__, __TIME__));
3288 PerlIO_printf(PerlIO_stdout(),
3289 Perl_form(aTHX_ " OS Specific Release: %s\n",
3293 #if defined(LOCAL_PATCH_COUNT)
3294 if (LOCAL_PATCH_COUNT > 0)
3295 PerlIO_printf(PerlIO_stdout(),
3296 "\n(with %d registered patch%s, "
3297 "see perl -V for more detail)",
3299 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "\n\nCopyright 1987-2006, Larry Wall\n");
3304 #ifdef MACOS_TRADITIONAL
3305 PerlIO_printf(PerlIO_stdout(),
3306 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3307 "maintained by Chris Nandor\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3316 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3321 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3324 PerlIO_printf(PerlIO_stdout(),
3325 "atariST series port, ++jrb bammi@cadence.com\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3332 PerlIO_printf(PerlIO_stdout(),
3333 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3344 PerlIO_printf(PerlIO_stdout(),
3345 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3348 PerlIO_printf(PerlIO_stdout(),
3349 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3352 PerlIO_printf(PerlIO_stdout(),
3353 "MiNT port by Guido Flohr, 1997-1999\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "EPOC port by Olaf Flebbe, 1999-2002\n");
3360 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3361 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3364 #ifdef __SYMBIAN32__
3365 PerlIO_printf(PerlIO_stdout(),
3366 "Symbian port by Nokia, 2004-2005\n");
3368 #ifdef BINARY_BUILD_NOTICE
3369 BINARY_BUILD_NOTICE;
3371 PerlIO_printf(PerlIO_stdout(),
3373 Perl may be copied only under the terms of either the Artistic License or the\n\
3374 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3375 Complete documentation for Perl, including FAQ lists, should be found on\n\
3376 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3377 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3380 if (! (PL_dowarn & G_WARN_ALL_MASK))
3381 PL_dowarn |= G_WARN_ON;
3385 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3386 if (!specialWARN(PL_compiling.cop_warnings))
3387 PerlMemShared_free(PL_compiling.cop_warnings);
3388 PL_compiling.cop_warnings = pWARN_ALL ;
3392 PL_dowarn = G_WARN_ALL_OFF;
3393 if (!specialWARN(PL_compiling.cop_warnings))
3394 PerlMemShared_free(PL_compiling.cop_warnings);
3395 PL_compiling.cop_warnings = pWARN_NONE ;
3400 if (s[1] == '-') /* Additional switches on #! line. */
3405 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3411 #ifdef ALTERNATE_SHEBANG
3412 case 'S': /* OS/2 needs -S on "extproc" line. */
3420 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3425 /* compliments of Tom Christiansen */
3427 /* unexec() can be found in the Gnu emacs distribution */
3428 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3431 Perl_my_unexec(pTHX)
3433 PERL_UNUSED_CONTEXT;
3435 SV * prog = newSVpv(BIN_EXP, 0);
3436 SV * file = newSVpv(PL_origfilename, 0);
3440 sv_catpvs(prog, "/perl");
3441 sv_catpvs(file, ".perldump");
3443 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3444 /* unexec prints msg to stderr in case of failure */
3445 PerlProc_exit(status);
3448 # include <lib$routines.h>
3449 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3450 # elif defined(WIN32) || defined(__CYGWIN__)
3451 Perl_croak(aTHX_ "dump is not supported");
3453 ABORT(); /* for use with undump */
3458 /* initialize curinterp */
3464 # define PERLVAR(var,type)
3465 # define PERLVARA(var,n,type)
3466 # if defined(PERL_IMPLICIT_CONTEXT)
3467 # define PERLVARI(var,type,init) aTHX->var = init;
3468 # define PERLVARIC(var,type,init) aTHX->var = init;
3470 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3471 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3473 # include "intrpvar.h"
3474 # include "thrdvar.h"
3480 # define PERLVAR(var,type)
3481 # define PERLVARA(var,n,type)
3482 # define PERLVARI(var,type,init) PL_##var = init;
3483 # define PERLVARIC(var,type,init) PL_##var = init;
3484 # include "intrpvar.h"
3485 # include "thrdvar.h"
3492 /* As these are inside a structure, PERLVARI isn't capable of initialising
3494 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3495 PL_reg_poscache = PL_reg_starttry = NULL;
3499 S_init_main_stash(pTHX)
3504 PL_curstash = PL_defstash = newHV();
3505 /* We know that the string "main" will be in the global shared string
3506 table, so it's a small saving to use it rather than allocate another
3508 PL_curstname = newSVpvs_share("main");
3509 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3510 /* If we hadn't caused another reference to "main" to be in the shared
3511 string table above, then it would be worth reordering these two,
3512 because otherwise all we do is delete "main" from it as a consequence
3513 of the SvREFCNT_dec, only to add it again with hv_name_set */
3514 SvREFCNT_dec(GvHV(gv));
3515 hv_name_set(PL_defstash, "main", 4, 0);
3516 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3518 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3520 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3521 GvMULTI_on(PL_incgv);
3522 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3523 GvMULTI_on(PL_hintgv);
3524 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3525 SvREFCNT_inc_simple(PL_defgv);
3526 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3527 SvREFCNT_inc_simple(PL_errgv);
3528 GvMULTI_on(PL_errgv);
3529 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3530 GvMULTI_on(PL_replgv);
3531 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3532 #ifdef PERL_DONT_CREATE_GVSV
3535 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3536 sv_setpvn(ERRSV, "", 0);
3537 PL_curstash = PL_defstash;
3538 CopSTASH_set(&PL_compiling, PL_defstash);
3539 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3540 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3542 /* We must init $/ before switches are processed. */
3543 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3547 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3553 const char *cpp_discard_flag;
3562 PL_origfilename = savepvs("-e");
3565 /* if find_script() returns, it returns a malloc()-ed value */
3566 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3568 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3569 const char *s = scriptname + 8;
3575 * Tell apart "normal" usage of fdscript, e.g.
3576 * with bash on FreeBSD:
3577 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3578 * from usage in suidperl.
3579 * Does any "normal" usage leave garbage after the number???
3580 * Is it a mistake to use a similar /dev/fd/ construct for
3585 * Be supersafe and do some sanity-checks.
3586 * Still, can we be sure we got the right thing?
3589 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3592 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3594 scriptname = savepv(s + 1);
3595 Safefree(PL_origfilename);
3596 PL_origfilename = (char *)scriptname;
3601 CopFILE_free(PL_curcop);
3602 CopFILE_set(PL_curcop, PL_origfilename);
3603 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3604 scriptname = (char *)"";
3605 if (fdscript >= 0) {
3606 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3607 # if defined(HAS_FCNTL) && defined(F_SETFD)
3609 /* ensure close-on-exec */
3610 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3615 Perl_croak(aTHX_ "sperl needs fd script\n"
3616 "You should not call sperl directly; do you need to "
3617 "change a #! line\nfrom sperl to perl?\n");
3620 * Do not open (or do other fancy stuff) while setuid.
3621 * Perl does the open, and hands script to suidperl on a fd;
3622 * suidperl only does some checks, sets up UIDs and re-execs
3623 * perl with that fd as it has always done.
3626 if (*suidscript != 1) {
3627 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3630 else if (PL_preprocess) {
3631 const char * const cpp_cfg = CPPSTDIN;
3632 SV * const cpp = newSVpvs("");
3633 SV * const cmd = newSV(0);
3635 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3636 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3637 if (strEQ(cpp_cfg, "cppstdin"))
3638 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3639 sv_catpv(cpp, cpp_cfg);
3642 sv_catpvs(sv, "-I");
3643 sv_catpv(sv,PRIVLIB_EXP);
3646 DEBUG_P(PerlIO_printf(Perl_debug_log,
3647 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3648 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3651 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3658 cpp_discard_flag = "";
3660 cpp_discard_flag = "-C";
3664 perl = os2_execname(aTHX);
3666 perl = PL_origargv[0];
3670 /* This strips off Perl comments which might interfere with
3671 the C pre-processor, including #!. #line directives are
3672 deliberately stripped to avoid confusion with Perl's version
3673 of #line. FWP played some golf with it so it will fit
3674 into VMS's 255 character buffer.
3677 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3679 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3681 Perl_sv_setpvf(aTHX_ cmd, "\
3682 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3683 perl, quote, code, quote, scriptname, (void*)cpp,
3684 cpp_discard_flag, (void*)sv, CPPMINUS);
3686 PL_doextract = FALSE;
3688 DEBUG_P(PerlIO_printf(Perl_debug_log,
3689 "PL_preprocess: cmd=\"%s\"\n",
3692 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3696 else if (!*scriptname) {
3697 forbid_setid(0, *suidscript);
3698 PL_rsfp = PerlIO_stdin();
3701 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3702 # if defined(HAS_FCNTL) && defined(F_SETFD)
3704 /* ensure close-on-exec */
3705 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3708 #endif /* IAMSUID */
3710 /* PSz 16 Sep 03 Keep neat error message */
3712 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3714 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3715 CopFILE(PL_curcop), Strerror(errno));
3721 * I_SYSSTATVFS HAS_FSTATVFS
3723 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3724 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3725 * here so that metaconfig picks them up. */
3729 S_fd_on_nosuid_fs(pTHX_ int fd)
3732 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3733 * but is needed also on machines without setreuid.
3734 * Seems safe enough to run as root.
3736 int check_okay = 0; /* able to do all the required sys/libcalls */
3737 int on_nosuid = 0; /* the fd is on a nosuid fs */
3739 * Need to check noexec also: nosuid might not be set, the average
3740 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3742 int on_noexec = 0; /* the fd is on a noexec fs */
3745 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3746 * fstatvfs() is UNIX98.
3747 * fstatfs() is 4.3 BSD.
3748 * ustat()+getmnt() is pre-4.3 BSD.
3749 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3750 * an irrelevant filesystem while trying to reach the right one.
3753 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3755 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3756 defined(HAS_FSTATVFS)
3757 # define FD_ON_NOSUID_CHECK_OKAY
3758 struct statvfs stfs;
3760 check_okay = fstatvfs(fd, &stfs) == 0;
3761 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3763 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3764 on platforms where it is present. */
3765 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3767 # endif /* fstatvfs */
3769 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3770 defined(PERL_MOUNT_NOSUID) && \
3771 defined(PERL_MOUNT_NOEXEC) && \
3772 defined(HAS_FSTATFS) && \
3773 defined(HAS_STRUCT_STATFS) && \
3774 defined(HAS_STRUCT_STATFS_F_FLAGS)
3775 # define FD_ON_NOSUID_CHECK_OKAY
3778 check_okay = fstatfs(fd, &stfs) == 0;
3779 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3780 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3781 # endif /* fstatfs */
3783 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3784 defined(PERL_MOUNT_NOSUID) && \
3785 defined(PERL_MOUNT_NOEXEC) && \
3786 defined(HAS_FSTAT) && \
3787 defined(HAS_USTAT) && \
3788 defined(HAS_GETMNT) && \
3789 defined(HAS_STRUCT_FS_DATA) && \
3791 # define FD_ON_NOSUID_CHECK_OKAY
3794 if (fstat(fd, &fdst) == 0) {
3796 if (ustat(fdst.st_dev, &us) == 0) {
3798 /* NOSTAT_ONE here because we're not examining fields which
3799 * vary between that case and STAT_ONE. */
3800 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3801 size_t cmplen = sizeof(us.f_fname);
3802 if (sizeof(fsd.fd_req.path) < cmplen)
3803 cmplen = sizeof(fsd.fd_req.path);
3804 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3805 fdst.st_dev == fsd.fd_req.dev) {
3807 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3808 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3813 # endif /* fstat+ustat+getmnt */
3815 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3816 defined(HAS_GETMNTENT) && \
3817 defined(HAS_HASMNTOPT) && \
3818 defined(MNTOPT_NOSUID) && \
3819 defined(MNTOPT_NOEXEC)
3820 # define FD_ON_NOSUID_CHECK_OKAY
3821 FILE *mtab = fopen("/etc/mtab", "r");
3822 struct mntent *entry;
3825 if (mtab && (fstat(fd, &stb) == 0)) {
3826 while (entry = getmntent(mtab)) {
3827 if (stat(entry->mnt_dir, &fsb) == 0
3828 && fsb.st_dev == stb.st_dev)
3830 /* found the filesystem */
3832 if (hasmntopt(entry, MNTOPT_NOSUID))
3834 if (hasmntopt(entry, MNTOPT_NOEXEC))
3837 } /* A single fs may well fail its stat(). */
3842 # endif /* getmntent+hasmntopt */
3845 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3847 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3849 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3850 return ((!check_okay) || on_nosuid || on_noexec);
3852 #endif /* IAMSUID */
3855 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3856 int fdscript, int suidscript)
3861 #endif /* IAMSUID */
3863 /* do we need to emulate setuid on scripts? */
3865 /* This code is for those BSD systems that have setuid #! scripts disabled
3866 * in the kernel because of a security problem. Merely defining DOSUID
3867 * in perl will not fix that problem, but if you have disabled setuid
3868 * scripts in the kernel, this will attempt to emulate setuid and setgid
3869 * on scripts that have those now-otherwise-useless bits set. The setuid
3870 * root version must be called suidperl or sperlN.NNN. If regular perl
3871 * discovers that it has opened a setuid script, it calls suidperl with
3872 * the same argv that it had. If suidperl finds that the script it has
3873 * just opened is NOT setuid root, it sets the effective uid back to the
3874 * uid. We don't just make perl setuid root because that loses the
3875 * effective uid we had before invoking perl, if it was different from the
3878 * Description/comments above do not match current workings:
3879 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3880 * suidperl called with script open and name changed to /dev/fd/N/X;
3881 * suidperl croaks if script is not setuid;
3882 * making perl setuid would be a huge security risk (and yes, that
3883 * would lose any euid we might have had).
3885 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3886 * be defined in suidperl only. suidperl must be setuid root. The
3887 * Configure script will set this up for you if you want it.
3893 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3894 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3895 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3897 const char *linestr;
3901 if (fdscript < 0 || suidscript != 1)
3902 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3904 * Since the script is opened by perl, not suidperl, some of these
3905 * checks are superfluous. Leaving them in probably does not lower
3909 * Do checks even for systems with no HAS_SETREUID.
3910 * We used to swap, then re-swap UIDs with
3912 if (setreuid(PL_euid,PL_uid) < 0
3913 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3914 Perl_croak(aTHX_ "Can't swap uid and euid");
3917 if (setreuid(PL_uid,PL_euid) < 0
3918 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3919 Perl_croak(aTHX_ "Can't reswap uid and euid");
3923 /* On this access check to make sure the directories are readable,
3924 * there is actually a small window that the user could use to make
3925 * filename point to an accessible directory. So there is a faint
3926 * chance that someone could execute a setuid script down in a
3927 * non-accessible directory. I don't know what to do about that.
3928 * But I don't think it's too important. The manual lies when
3929 * it says access() is useful in setuid programs.
3931 * So, access() is pretty useless... but not harmful... do anyway.
3933 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3934 Perl_croak(aTHX_ "Can't access() script\n");
3937 /* If we can swap euid and uid, then we can determine access rights
3938 * with a simple stat of the file, and then compare device and
3939 * inode to make sure we did stat() on the same file we opened.
3940 * Then we just have to make sure he or she can execute it.
3943 * As the script is opened by perl, not suidperl, we do not need to
3944 * care much about access rights.
3946 * The 'script changed' check is needed, or we can get lied to
3947 * about $0 with e.g.
3948 * suidperl /dev/fd/4//bin/x 4<setuidscript
3949 * Without HAS_SETREUID, is it safe to stat() as root?
3951 * Are there any operating systems that pass /dev/fd/xxx for setuid
3952 * scripts, as suggested/described in perlsec(1)? Surely they do not
3953 * pass the script name as we do, so the "script changed" test would
3954 * fail for them... but we never get here with
3955 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3957 * This is one place where we must "lie" about return status: not
3958 * say if the stat() failed. We are doing this as root, and could
3959 * be tricked into reporting existence or not of files that the
3960 * "plain" user cannot even see.
3964 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3965 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3966 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3967 Perl_croak(aTHX_ "Setuid script changed\n");
3971 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3972 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3975 * We used to do this check as the "plain" user (after swapping
3976 * UIDs). But the check for nosuid and noexec filesystem is needed,
3977 * and should be done even without HAS_SETREUID. (Maybe those
3978 * operating systems do not have such mount options anyway...)
3979 * Seems safe enough to do as root.
3981 #if !defined(NO_NOSUID_CHECK)
3982 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3983 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3986 #endif /* IAMSUID */
3988 if (!S_ISREG(PL_statbuf.st_mode)) {
3989 Perl_croak(aTHX_ "Setuid script not plain file\n");
3991 if (PL_statbuf.st_mode & S_IWOTH)
3992 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3993 PL_doswitches = FALSE; /* -s is insecure in suid */
3994 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3995 CopLINE_inc(PL_curcop);
3996 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3997 Perl_croak(aTHX_ "No #! line");
3998 linestr = SvPV_nolen_const(PL_linestr);
3999 /* required even on Sys V */
4000 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4001 Perl_croak(aTHX_ "No #! line");
4005 /* Sanity check on line length */
4006 s_end = s + strlen(s);
4007 if (s_end == s || (s_end - s) > 4000)
4008 Perl_croak(aTHX_ "Very long #! line");
4009 /* Allow more than a single space after #! */
4010 while (isSPACE(*s)) s++;
4011 /* Sanity check on buffer end */
4012 while ((*s) && !isSPACE(*s)) s++;
4013 for (s2 = s; (s2 > linestr &&
4014 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4015 || s2[-1] == '-')); s2--) ;
4016 /* Sanity check on buffer start */
4017 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4018 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4019 Perl_croak(aTHX_ "Not a perl script");
4020 while (*s == ' ' || *s == '\t') s++;
4022 * #! arg must be what we saw above. They can invoke it by
4023 * mentioning suidperl explicitly, but they may not add any strange
4024 * arguments beyond what #! says if they do invoke suidperl that way.
4027 * The way validarg was set up, we rely on the kernel to start
4028 * scripts with argv[1] set to contain all #! line switches (the
4032 * Check that we got all the arguments listed in the #! line (not
4033 * just that there are no extraneous arguments). Might not matter
4034 * much, as switches from #! line seem to be acted upon (also), and
4035 * so may be checked and trapped in perl. But, security checks must
4036 * be done in suidperl and not deferred to perl. Note that suidperl
4037 * does not get around to parsing (and checking) the switches on
4038 * the #! line (but execs perl sooner).
4039 * Allow (require) a trailing newline (which may be of two
4040 * characters on some architectures?) (but no other trailing
4043 len = strlen(validarg);
4044 if (strEQ(validarg," PHOOEY ") ||
4045 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4046 !((s_end - s) == len+1
4047 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4048 Perl_croak(aTHX_ "Args must match #! line");
4052 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4053 PL_euid == PL_statbuf.st_uid)
4055 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4056 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4057 #endif /* IAMSUID */
4060 PL_euid) { /* oops, we're not the setuid root perl */
4062 * When root runs a setuid script, we do not go through the same
4063 * steps of execing sperl and then perl with fd scripts, but
4064 * simply set up UIDs within the same perl invocation; so do
4065 * not have the same checks (on options, whatever) that we have
4066 * for plain users. No problem really: would have to be a script
4067 * that does not actually work for plain users; and if root is
4068 * foolish and can be persuaded to run such an unsafe script, he
4069 * might run also non-setuid ones, and deserves what he gets.
4071 * Or, we might drop the PL_euid check above (and rely just on
4072 * fdscript to avoid loops), and do the execs
4078 * Pass fd script to suidperl.
4079 * Exec suidperl, substituting fd script for scriptname.
4080 * Pass script name as "subdir" of fd, which perl will grok;
4081 * in fact will use that to distinguish this from "normal"
4082 * usage, see comments above.
4084 PerlIO_rewind(PL_rsfp);
4085 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4086 /* PSz 27 Feb 04 Sanity checks on scriptname */
4087 if ((!scriptname) || (!*scriptname) ) {
4088 Perl_croak(aTHX_ "No setuid script name\n");
4090 if (*scriptname == '-') {
4091 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4092 /* Or we might confuse it with an option when replacing
4093 * name in argument list, below (though we do pointer, not
4094 * string, comparisons).
4097 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4098 if (!PL_origargv[which]) {
4099 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4101 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4102 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4103 #if defined(HAS_FCNTL) && defined(F_SETFD)
4104 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4107 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4108 (int)PERL_REVISION, (int)PERL_VERSION,
4109 (int)PERL_SUBVERSION), PL_origargv);
4111 #endif /* IAMSUID */
4112 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4115 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4117 * This seems back to front: we try HAS_SETEGID first; if not available
4118 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4119 * in the sense that we only want to set EGID; but are there any machines
4120 * with either of the latter, but not the former? Same with UID, later.
4123 (void)setegid(PL_statbuf.st_gid);
4126 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4128 #ifdef HAS_SETRESGID
4129 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4131 PerlProc_setgid(PL_statbuf.st_gid);
4135 if (PerlProc_getegid() != PL_statbuf.st_gid)
4136 Perl_croak(aTHX_ "Can't do setegid!\n");
4138 if (PL_statbuf.st_mode & S_ISUID) {
4139 if (PL_statbuf.st_uid != PL_euid)
4141 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4144 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4146 #ifdef HAS_SETRESUID
4147 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4149 PerlProc_setuid(PL_statbuf.st_uid);
4153 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4154 Perl_croak(aTHX_ "Can't do seteuid!\n");
4156 else if (PL_uid) { /* oops, mustn't run as root */
4158 (void)seteuid((Uid_t)PL_uid);
4161 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4163 #ifdef HAS_SETRESUID
4164 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4166 PerlProc_setuid((Uid_t)PL_uid);
4170 if (PerlProc_geteuid() != PL_uid)
4171 Perl_croak(aTHX_ "Can't do seteuid!\n");
4174 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4175 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4178 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4179 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4180 else if (fdscript < 0 || suidscript != 1)
4181 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4182 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4184 /* PSz 16 Sep 03 Keep neat error message */
4185 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4188 /* We absolutely must clear out any saved ids here, so we */
4189 /* exec the real perl, substituting fd script for scriptname. */
4190 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4192 * It might be thought that using setresgid and/or setresuid (changed to
4193 * set the saved IDs) above might obviate the need to exec, and we could
4194 * go on to "do the perl thing".
4196 * Is there such a thing as "saved GID", and is that set for setuid (but
4197 * not setgid) execution like suidperl? Without exec, it would not be
4198 * cleared for setuid (but not setgid) scripts (or might need a dummy
4201 * We need suidperl to do the exact same argument checking that perl
4202 * does. Thus it cannot be very small; while it could be significantly
4203 * smaller, it is safer (simpler?) to make it essentially the same
4204 * binary as perl (but they are not identical). - Maybe could defer that
4205 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4206 * but prefer to do thorough checks in suidperl itself. Such deferral
4207 * would make suidperl security rely on perl, a design no-no.
4209 * Setuid things should be short and simple, thus easy to understand and
4210 * verify. They should do their "own thing", without influence by
4211 * attackers. It may help if their internal execution flow is fixed,
4212 * regardless of platform: it may be best to exec anyway.
4214 * Suidperl should at least be conceptually simple: a wrapper only,
4215 * never to do any real perl. Maybe we should put
4217 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4219 * into the perly bits.
4221 PerlIO_rewind(PL_rsfp);
4222 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4224 * Keep original arguments: suidperl already has fd script.
4226 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4227 /* if (!PL_origargv[which]) { */
4228 /* errno = EPERM; */
4229 /* Perl_croak(aTHX_ "Permission denied\n"); */
4231 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4232 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4233 #if defined(HAS_FCNTL) && defined(F_SETFD)
4234 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4237 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4238 (int)PERL_REVISION, (int)PERL_VERSION,
4239 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4241 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4242 #endif /* IAMSUID */
4244 PERL_UNUSED_ARG(fdscript);
4245 PERL_UNUSED_ARG(suidscript);
4246 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4247 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4248 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4249 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4251 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4254 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4255 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4256 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4257 /* not set-id, must be wrapped */
4260 PERL_UNUSED_ARG(validarg);
4261 PERL_UNUSED_ARG(scriptname);
4265 S_find_beginning(pTHX)
4269 register const char *s2;
4270 #ifdef MACOS_TRADITIONAL
4274 /* skip forward in input to the real script? */
4276 #ifdef MACOS_TRADITIONAL
4277 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4279 while (PL_doextract || gMacPerl_AlwaysExtract) {
4280 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4281 if (!gMacPerl_AlwaysExtract)
4282 Perl_croak(aTHX_ "No Perl script found in input\n");
4284 if (PL_doextract) /* require explicit override ? */
4285 if (!OverrideExtract(PL_origfilename))
4286 Perl_croak(aTHX_ "User aborted script\n");
4288 PL_doextract = FALSE;
4290 /* Pater peccavi, file does not have #! */
4291 PerlIO_rewind(PL_rsfp);
4296 while (PL_doextract) {
4297 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4298 Perl_croak(aTHX_ "No Perl script found in input\n");
4301 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4302 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4303 PL_doextract = FALSE;
4304 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4306 while (*s == ' ' || *s == '\t') s++;
4308 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4309 || s2[-1] == '_') s2--;
4310 if (strnEQ(s2-4,"perl",4))
4311 while ((s = moreswitches(s)))
4314 #ifdef MACOS_TRADITIONAL
4315 /* We are always searching for the #!perl line in MacPerl,
4316 * so if we find it, still keep the line count correct
4317 * by counting lines we already skipped over
4319 for (; maclines > 0 ; maclines--)
4320 PerlIO_ungetc(PL_rsfp, '\n');
4324 /* gMacPerl_AlwaysExtract is false in MPW tool */
4325 } else if (gMacPerl_AlwaysExtract) {
4337 PL_uid = PerlProc_getuid();
4338 PL_euid = PerlProc_geteuid();
4339 PL_gid = PerlProc_getgid();
4340 PL_egid = PerlProc_getegid();
4342 PL_uid |= PL_gid << 16;
4343 PL_euid |= PL_egid << 16;
4345 /* Should not happen: */
4346 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4347 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4350 * Should go by suidscript, not uid!=euid: why disallow
4351 * system("ls") in scripts run from setuid things?
4352 * Or, is this run before we check arguments and set suidscript?
4353 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4354 * (We never have suidscript, can we be sure to have fdscript?)
4355 * Or must then go by UID checks? See comments in forbid_setid also.
4359 /* This is used very early in the lifetime of the program,
4360 * before even the options are parsed, so PL_tainting has
4361 * not been initialized properly. */
4363 Perl_doing_taint(int argc, char *argv[], char *envp[])
4365 #ifndef PERL_IMPLICIT_SYS
4366 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4367 * before we have an interpreter-- and the whole point of this
4368 * function is to be called at such an early stage. If you are on
4369 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4370 * "tainted because running with altered effective ids', you'll
4371 * have to add your own checks somewhere in here. The two most
4372 * known samples of 'implicitness' are Win32 and NetWare, neither
4373 * of which has much of concept of 'uids'. */
4374 int uid = PerlProc_getuid();
4375 int euid = PerlProc_geteuid();
4376 int gid = PerlProc_getgid();
4377 int egid = PerlProc_getegid();
4384 if (uid && (euid != uid || egid != gid))
4386 #endif /* !PERL_IMPLICIT_SYS */
4387 /* This is a really primitive check; environment gets ignored only
4388 * if -T are the first chars together; otherwise one gets
4389 * "Too late" message. */
4390 if ( argc > 1 && argv[1][0] == '-'
4391 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4396 /* Passing the flag as a single char rather than a string is a slight space
4397 optimisation. The only message that isn't /^-.$/ is
4398 "program input from stdin", which is substituted in place of '\0', which
4399 could never be a command line flag. */
4401 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4404 char string[3] = "-x";
4405 const char *message = "program input from stdin";
4412 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4413 if (PL_euid != PL_uid)
4414 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4415 if (PL_egid != PL_gid)
4416 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4417 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4419 * Checks for UID/GID above "wrong": why disallow
4420 * perl -e 'print "Hello\n"'
4421 * from within setuid things?? Simply drop them: replaced by
4422 * fdscript/suidscript and #ifdef IAMSUID checks below.
4424 * This may be too late for command-line switches. Will catch those on
4425 * the #! line, after finding the script name and setting up
4426 * fdscript/suidscript. Note that suidperl does not get around to
4427 * parsing (and checking) the switches on the #! line, but checks that
4428 * the two sets are identical.
4430 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4431 * instead, or would that be "too late"? (We never have suidscript, can
4432 * we be sure to have fdscript?)
4434 * Catch things with suidscript (in descendant of suidperl), even with
4435 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4436 * below; but I am paranoid.
4438 * Also see comments about root running a setuid script, elsewhere.
4440 if (suidscript >= 0)
4441 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4443 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4444 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4445 #endif /* IAMSUID */
4449 Perl_init_debugger(pTHX)
4452 HV * const ostash = PL_curstash;
4454 PL_curstash = PL_debstash;
4455 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4457 AvREAL_off(PL_dbargs);
4458 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4459 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4460 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4461 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4462 sv_setiv(PL_DBsingle, 0);
4463 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4464 sv_setiv(PL_DBtrace, 0);
4465 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4466 sv_setiv(PL_DBsignal, 0);
4467 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4468 sv_setiv(PL_DBassertion, 0);
4469 PL_curstash = ostash;
4472 #ifndef STRESS_REALLOC
4473 #define REASONABLE(size) (size)
4475 #define REASONABLE(size) (1) /* unreasonable */
4479 Perl_init_stacks(pTHX)
4482 /* start with 128-item stack and 8K cxstack */
4483 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4484 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4485 PL_curstackinfo->si_type = PERLSI_MAIN;
4486 PL_curstack = PL_curstackinfo->si_stack;
4487 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4489 PL_stack_base = AvARRAY(PL_curstack);
4490 PL_stack_sp = PL_stack_base;
4491 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4493 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4496 PL_tmps_max = REASONABLE(128);
4498 Newx(PL_markstack,REASONABLE(32),I32);
4499 PL_markstack_ptr = PL_markstack;
4500 PL_markstack_max = PL_markstack + REASONABLE(32);
4504 Newx(PL_scopestack,REASONABLE(32),I32);
4505 PL_scopestack_ix = 0;
4506 PL_scopestack_max = REASONABLE(32);
4508 Newx(PL_savestack,REASONABLE(128),ANY);
4509 PL_savestack_ix = 0;
4510 PL_savestack_max = REASONABLE(128);
4519 while (PL_curstackinfo->si_next)
4520 PL_curstackinfo = PL_curstackinfo->si_next;
4521 while (PL_curstackinfo) {
4522 PERL_SI *p = PL_curstackinfo->si_prev;
4523 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4524 Safefree(PL_curstackinfo->si_cxstack);
4525 Safefree(PL_curstackinfo);
4526 PL_curstackinfo = p;
4528 Safefree(PL_tmps_stack);
4529 Safefree(PL_markstack);
4530 Safefree(PL_scopestack);
4531 Safefree(PL_savestack);
4541 lex_start(PL_linestr);
4543 PL_subname = newSVpvs("main");
4547 S_init_predump_symbols(pTHX)
4553 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4554 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4555 GvMULTI_on(PL_stdingv);
4556 io = GvIOp(PL_stdingv);
4557 IoTYPE(io) = IoTYPE_RDONLY;
4558 IoIFP(io) = PerlIO_stdin();
4559 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4561 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4563 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4566 IoTYPE(io) = IoTYPE_WRONLY;
4567 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4569 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4574 GvMULTI_on(PL_stderrgv);
4575 io = GvIOp(PL_stderrgv);
4576 IoTYPE(io) = IoTYPE_WRONLY;
4577 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4578 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4580 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4582 PL_statname = newSV(0); /* last filename we did stat on */
4584 Safefree(PL_osname);
4585 PL_osname = savepv(OSNAME);
4589 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4592 argc--,argv++; /* skip name of script */
4593 if (PL_doswitches) {
4594 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4598 if (argv[0][1] == '-' && !argv[0][2]) {
4602 if ((s = strchr(argv[0], '='))) {
4603 const char *const start_name = argv[0] + 1;
4604 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4605 TRUE, SVt_PV)), s + 1);
4608 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4611 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4612 GvMULTI_on(PL_argvgv);
4613 (void)gv_AVadd(PL_argvgv);
4614 av_clear(GvAVn(PL_argvgv));
4615 for (; argc > 0; argc--,argv++) {
4616 SV * const sv = newSVpv(argv[0],0);
4617 av_push(GvAVn(PL_argvgv),sv);
4618 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4619 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4622 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4623 (void)sv_utf8_decode(sv);
4629 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4634 PL_toptarget = newSV(0);
4635 sv_upgrade(PL_toptarget, SVt_PVFM);
4636 sv_setpvn(PL_toptarget, "", 0);
4637 PL_bodytarget = newSV(0);
4638 sv_upgrade(PL_bodytarget, SVt_PVFM);
4639 sv_setpvn(PL_bodytarget, "", 0);
4640 PL_formtarget = PL_bodytarget;
4644 init_argv_symbols(argc,argv);
4646 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4647 #ifdef MACOS_TRADITIONAL
4648 /* $0 is not majick on a Mac */
4649 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4651 sv_setpv(GvSV(tmpgv),PL_origfilename);
4652 magicname("0", "0", 1);
4655 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4657 GvMULTI_on(PL_envgv);
4658 hv = GvHVn(PL_envgv);
4659 hv_magic(hv, NULL, PERL_MAGIC_env);
4661 #ifdef USE_ENVIRON_ARRAY
4662 /* Note that if the supplied env parameter is actually a copy
4663 of the global environ then it may now point to free'd memory
4664 if the environment has been modified since. To avoid this
4665 problem we treat env==NULL as meaning 'use the default'
4670 # ifdef USE_ITHREADS
4671 && PL_curinterp == aTHX
4678 char** origenv = environ;
4681 for (; *env; env++) {
4682 if (!(s = strchr(*env,'=')) || s == *env)
4684 #if defined(MSDOS) && !defined(DJGPP)
4689 sv = newSVpv(s+1, 0);
4690 (void)hv_store(hv, *env, s - *env, sv, 0);
4693 if (origenv != environ) {
4694 /* realloc has shifted us */
4695 env = (env - origenv) + environ;
4700 #endif /* USE_ENVIRON_ARRAY */
4701 #endif /* !PERL_MICRO */
4704 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4705 SvREADONLY_off(GvSV(tmpgv));
4706 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4707 SvREADONLY_on(GvSV(tmpgv));
4709 #ifdef THREADS_HAVE_PIDS
4710 PL_ppid = (IV)getppid();
4713 /* touch @F array to prevent spurious warnings 20020415 MJD */
4715 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4717 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4718 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4719 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4723 S_init_perllib(pTHX)
4729 s = PerlEnv_getenv("PERL5LIB");
4731 * It isn't possible to delete an environment variable with
4732 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4733 * case we treat PERL5LIB as undefined if it has a zero-length value.
4735 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4736 if (s && *s != '\0')
4740 incpush(s, TRUE, TRUE, TRUE, FALSE);
4742 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4744 /* Treat PERL5?LIB as a possible search list logical name -- the
4745 * "natural" VMS idiom for a Unix path string. We allow each
4746 * element to be a set of |-separated directories for compatibility.
4750 if (my_trnlnm("PERL5LIB",buf,0))
4751 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4753 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4757 /* Use the ~-expanded versions of APPLLIB (undocumented),
4758 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4761 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4765 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4767 #ifdef MACOS_TRADITIONAL
4770 SV * privdir = newSV(0);
4771 char * macperl = PerlEnv_getenv("MACPERL");
4776 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4777 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4778 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4779 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4780 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4781 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4783 SvREFCNT_dec(privdir);
4786 incpush(":", FALSE, FALSE, TRUE, FALSE);
4789 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4792 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4794 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4798 /* sitearch is always relative to sitelib on Windows for
4799 * DLL-based path intuition to work correctly */
4800 # if !defined(WIN32)
4801 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4807 /* this picks up sitearch as well */
4808 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4810 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4814 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4815 /* Search for version-specific dirs below here */
4816 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4819 #ifdef PERL_VENDORARCH_EXP
4820 /* vendorarch is always relative to vendorlib on Windows for
4821 * DLL-based path intuition to work correctly */
4822 # if !defined(WIN32)
4823 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4827 #ifdef PERL_VENDORLIB_EXP
4829 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4831 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4835 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4836 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4839 #ifdef PERL_OTHERLIBDIRS
4840 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4844 incpush(".", FALSE, FALSE, TRUE, FALSE);
4845 #endif /* MACOS_TRADITIONAL */
4848 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4849 # define PERLLIB_SEP ';'
4852 # define PERLLIB_SEP '|'
4854 # if defined(MACOS_TRADITIONAL)
4855 # define PERLLIB_SEP ','
4857 # define PERLLIB_SEP ':'
4861 #ifndef PERLLIB_MANGLE
4862 # define PERLLIB_MANGLE(s,n) (s)
4865 /* Push a directory onto @INC if it exists.
4866 Generate a new SV if we do this, to save needing to copy the SV we push
4869 S_incpush_if_exists(pTHX_ SV *dir)
4873 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4874 S_ISDIR(tmpstatbuf.st_mode)) {
4875 av_push(GvAVn(PL_incgv), dir);
4882 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4887 const char *p = dir;
4892 if (addsubdirs || addoldvers) {
4896 /* Break at all separators */
4898 SV *libdir = newSV(0);
4901 /* skip any consecutive separators */
4903 while ( *p == PERLLIB_SEP ) {
4904 /* Uncomment the next line for PATH semantics */
4905 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4910 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4911 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4916 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4917 p = NULL; /* break out */
4919 #ifdef MACOS_TRADITIONAL
4920 if (!strchr(SvPVX(libdir), ':')) {
4923 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4925 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4926 sv_catpvs(libdir, ":");
4929 /* Do the if() outside the #ifdef to avoid warnings about an unused
4932 #ifdef PERL_RELOCATABLE_INC
4934 * Relocatable include entries are marked with a leading .../
4937 * 0: Remove that leading ".../"
4938 * 1: Remove trailing executable name (anything after the last '/')
4939 * from the perl path to give a perl prefix
4941 * While the @INC element starts "../" and the prefix ends with a real
4942 * directory (ie not . or ..) chop that real directory off the prefix
4943 * and the leading "../" from the @INC element. ie a logical "../"
4945 * Finally concatenate the prefix and the remainder of the @INC element
4946 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4947 * generates /usr/local/lib/perl5
4949 const char *libpath = SvPVX(libdir);
4950 STRLEN libpath_len = SvCUR(libdir);
4951 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4953 SV * const caret_X = get_sv("\030", 0);
4954 /* Going to use the SV just as a scratch buffer holding a C
4960 /* $^X is *the* source of taint if tainting is on, hence
4961 SvPOK() won't be true. */
4963 assert(SvPOKp(caret_X));
4964 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4965 /* Firstly take off the leading .../
4966 If all else fail we'll do the paths relative to the current
4968 sv_chop(libdir, libpath + 4);
4969 /* Don't use SvPV as we're intentionally bypassing taining,
4970 mortal copies that the mg_get of tainting creates, and
4971 corruption that seems to come via the save stack.
4972 I guess that the save stack isn't correctly set up yet. */
4973 libpath = SvPVX(libdir);
4974 libpath_len = SvCUR(libdir);
4976 /* This would work more efficiently with memrchr, but as it's
4977 only a GNU extension we'd need to probe for it and
4978 implement our own. Not hard, but maybe not worth it? */
4980 prefix = SvPVX(prefix_sv);
4981 lastslash = strrchr(prefix, '/');
4983 /* First time in with the *lastslash = '\0' we just wipe off
4984 the trailing /perl from (say) /usr/foo/bin/perl
4988 while ((*lastslash = '\0'), /* Do that, come what may. */
4989 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4990 && (lastslash = strrchr(prefix, '/')))) {
4991 if (lastslash[1] == '\0'
4992 || (lastslash[1] == '.'
4993 && (lastslash[2] == '/' /* ends "/." */
4994 || (lastslash[2] == '/'
4995 && lastslash[3] == '/' /* or "/.." */
4997 /* Prefix ends "/" or "/." or "/..", any of which
4998 are fishy, so don't do any more logical cleanup.
5002 /* Remove leading "../" from path */
5005 /* Next iteration round the loop removes the last
5006 directory name from prefix by writing a '\0' in
5007 the while clause. */
5009 /* prefix has been terminated with a '\0' to the correct
5010 length. libpath points somewhere into the libdir SV.
5011 We need to join the 2 with '/' and drop the result into
5013 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5014 SvREFCNT_dec(libdir);
5015 /* And this is the new libdir. */
5018 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5019 /* Need to taint reloccated paths if running set ID */
5020 SvTAINTED_on(libdir);
5023 SvREFCNT_dec(prefix_sv);
5028 * BEFORE pushing libdir onto @INC we may first push version- and
5029 * archname-specific sub-directories.
5031 if (addsubdirs || addoldvers) {
5032 #ifdef PERL_INC_VERSION_LIST
5033 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5034 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5035 const char * const *incver;
5041 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5043 while (unix[len-1] == '/') len--; /* Cosmetic */
5044 sv_usepvn(libdir,unix,len);
5047 PerlIO_printf(Perl_error_log,
5048 "Failed to unixify @INC element \"%s\"\n",
5052 #ifdef MACOS_TRADITIONAL
5053 #define PERL_AV_SUFFIX_FMT ""
5054 #define PERL_ARCH_FMT "%s:"
5055 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5057 #define PERL_AV_SUFFIX_FMT "/"
5058 #define PERL_ARCH_FMT "/%s"
5059 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5061 /* .../version/archname if -d .../version/archname */
5062 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5064 (int)PERL_REVISION, (int)PERL_VERSION,
5065 (int)PERL_SUBVERSION, ARCHNAME);
5066 subdir = S_incpush_if_exists(aTHX_ subdir);
5068 /* .../version if -d .../version */
5069 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5071 (int)PERL_REVISION, (int)PERL_VERSION,
5072 (int)PERL_SUBVERSION);
5073 subdir = S_incpush_if_exists(aTHX_ subdir);
5075 /* .../archname if -d .../archname */
5076 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5077 (void*)libdir, ARCHNAME);
5078 subdir = S_incpush_if_exists(aTHX_ subdir);
5082 #ifdef PERL_INC_VERSION_LIST
5084 for (incver = incverlist; *incver; incver++) {
5085 /* .../xxx if -d .../xxx */
5086 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, (void *)libdir, *incver);
5087 subdir = S_incpush_if_exists(aTHX_ subdir);
5093 /* finally push this lib directory on the end of @INC */
5094 av_push(GvAVn(PL_incgv), libdir);
5097 assert (SvREFCNT(subdir) == 1);
5098 SvREFCNT_dec(subdir);
5104 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5108 const line_t oldline = CopLINE(PL_curcop);
5114 while (av_len(paramList) >= 0) {
5115 cv = (CV*)av_shift(paramList);
5117 if (paramList == PL_beginav) {
5118 /* save PL_beginav for compiler */
5119 if (! PL_beginav_save)
5120 PL_beginav_save = newAV();
5121 av_push(PL_beginav_save, (SV*)cv);
5123 else if (paramList == PL_checkav) {
5124 /* save PL_checkav for compiler */
5125 if (! PL_checkav_save)
5126 PL_checkav_save = newAV();
5127 av_push(PL_checkav_save, (SV*)cv);
5129 else if (paramList == PL_unitcheckav) {
5130 /* save PL_unitcheckav for compiler */
5131 if (! PL_unitcheckav_save)
5132 PL_unitcheckav_save = newAV();
5133 av_push(PL_unitcheckav_save, (SV*)cv);
5144 PL_madskills |= 16384;
5149 PL_madskills &= ~16384;
5152 (void)SvPV_const(atsv, len);
5153 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5154 break; /* not really trying to run, so just wing it */
5156 PL_curcop = &PL_compiling;
5157 CopLINE_set(PL_curcop, oldline);
5158 if (paramList == PL_beginav)
5159 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5161 Perl_sv_catpvf(aTHX_ atsv,
5162 "%s failed--call queue aborted",
5163 paramList == PL_checkav ? "CHECK"
5164 : paramList == PL_initav ? "INIT"
5165 : paramList == PL_unitcheckav ? "UNITCHECK"
5167 while (PL_scopestack_ix > oldscope)
5170 Perl_croak(aTHX_ "%"SVf"", (void*)atsv);
5177 /* my_exit() was called */
5178 while (PL_scopestack_ix > oldscope)
5181 PL_curstash = PL_defstash;
5182 PL_curcop = &PL_compiling;
5183 CopLINE_set(PL_curcop, oldline);
5185 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5186 return; /* not really trying to run, so just wing it */
5187 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5188 if (paramList == PL_beginav)
5189 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5191 Perl_croak(aTHX_ "%s failed--call queue aborted",
5192 paramList == PL_checkav ? "CHECK"
5193 : paramList == PL_initav ? "INIT"
5194 : paramList == PL_unitcheckav ? "UNITCHECK"
5201 PL_curcop = &PL_compiling;
5202 CopLINE_set(PL_curcop, oldline);
5205 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5214 Perl_my_exit(pTHX_ U32 status)
5217 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5218 thr, (unsigned long) status));
5227 STATUS_EXIT_SET(status);
5234 Perl_my_failure_exit(pTHX)
5238 /* We have been called to fall on our sword. The desired exit code
5239 * should be already set in STATUS_UNIX, but could be shifted over
5240 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5243 * If an error code has not been set, then force the issue.
5245 if (MY_POSIX_EXIT) {
5247 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5248 * the exit code when there isn't an error.
5251 if (STATUS_UNIX == 0)
5252 STATUS_UNIX_EXIT_SET(255);
5254 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5256 /* The exit code could have been set by $? or vmsish which
5257 * means that it may not be fatal. So convert
5258 * success/warning codes to fatal.
5260 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5261 STATUS_UNIX_EXIT_SET(255);
5265 /* Traditionally Perl on VMS always expects a Fatal Error. */
5266 if (vaxc$errno & 1) {
5268 /* So force success status to failure */
5269 if (STATUS_NATIVE & 1)
5274 STATUS_UNIX = EINTR; /* In case something cares */
5279 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5281 /* Encode the severity code */
5282 severity = STATUS_NATIVE & STS$M_SEVERITY;
5283 STATUS_UNIX = (severity ? severity : 1) << 8;
5285 /* Perl expects this to be a fatal error */
5286 if (severity != STS$K_SEVERE)
5295 STATUS_UNIX_SET(errno);
5297 exitstatus = STATUS_UNIX >> 8;
5298 if (exitstatus & 255)
5299 STATUS_UNIX_SET(exitstatus);
5301 STATUS_UNIX_SET(255);
5308 S_my_exit_jump(pTHX)
5313 SvREFCNT_dec(PL_e_script);
5317 POPSTACK_TO(PL_mainstack);
5325 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5328 const char * const p = SvPVX_const(PL_e_script);
5329 const char *nl = strchr(p, '\n');
5331 PERL_UNUSED_ARG(idx);
5332 PERL_UNUSED_ARG(maxlen);
5334 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5336 filter_del(read_e_script);
5339 sv_catpvn(buf_sv, p, nl-p);
5340 sv_chop(PL_e_script, nl);
5346 * c-indentation-style: bsd
5348 * indent-tabs-mode: t
5351 * ex: set ts=8 sts=4 sw=4 noet: