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
141 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
153 #ifdef PERL_IMPLICIT_CONTEXT
154 MUTEX_INIT(&PL_my_ctx_mutex);
158 PERL_SET_THX(my_perl);
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
171 /* Newx() needs interpreter, so call malloc() instead */
172 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
173 S_init_tls_and_interp(my_perl);
174 Zero(my_perl, 1, PerlInterpreter);
184 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
191 =head1 Embedding Functions
193 =for apidoc perl_alloc
195 Allocates a new Perl interpreter. See L<perlembed>.
203 PerlInterpreter *my_perl;
205 /* Newx() needs interpreter, so call malloc() instead */
206 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
208 S_init_tls_and_interp(my_perl);
209 #ifndef PERL_TRACK_MEMPOOL
210 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
212 Zero(my_perl, 1, PerlInterpreter);
213 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
217 #endif /* PERL_IMPLICIT_SYS */
220 =for apidoc perl_construct
222 Initializes a new Perl interpreter. See L<perlembed>.
228 perl_construct(pTHXx)
234 PL_perl_destruct_level = 1;
236 if (PL_perl_destruct_level > 0)
239 /* Init the real globals (and main thread)? */
241 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
243 PL_linestr = newSV(79);
244 sv_upgrade(PL_linestr,SVt_PVIV);
246 if (!SvREADONLY(&PL_sv_undef)) {
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. */
258 SvREADONLY_on(&PL_sv_no);
259 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
261 sv_setpv(&PL_sv_yes,PL_Yes);
264 SvREADONLY_on(&PL_sv_yes);
265 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
267 SvREADONLY_on(&PL_sv_placeholder);
268 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
271 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
272 #ifdef PERL_USES_PL_PIDSTATUS
273 PL_pidstatus = newHV();
277 PL_rs = newSVpvs("\n");
282 PL_lex_state = LEX_NOTPARSING;
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
304 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
305 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
307 PL_regex_padav = newAV();
308 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
309 PL_regex_pad = AvARRAY(PL_regex_padav);
311 #ifdef USE_REENTRANT_API
312 Perl_reentrant_init(aTHX);
315 /* Note that strtab is a rather special HV. Assumptions are made
316 about not iterating on it, and not adding tie magic to it.
317 It is properly deallocated in perl_destruct() */
320 HvSHAREKEYS_off(PL_strtab); /* mandatory */
321 hv_ksplit(PL_strtab, 512);
323 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
324 _dyld_lookup_and_bind
325 ("__environ", (unsigned long *) &environ_pointer, NULL);
329 # ifdef USE_ENVIRON_ARRAY
330 PL_origenviron = environ;
334 /* Use sysconf(_SC_CLK_TCK) if available, if not
335 * available or if the sysconf() fails, use the HZ.
336 * BeOS has those, but returns the wrong value.
337 * The HZ if not originally defined has been by now
338 * been defined as CLK_TCK, if available. */
339 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
340 PL_clocktick = sysconf(_SC_CLK_TCK);
341 if (PL_clocktick <= 0)
345 PL_stashcache = newHV();
347 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
348 (int)PERL_VERSION, (int)PERL_SUBVERSION);
351 if (!PL_mmap_page_size) {
352 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
354 SETERRNO(0, SS_NORMAL);
356 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
358 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
360 if ((long) PL_mmap_page_size < 0) {
362 SV * const error = ERRSV;
363 (void) SvUPGRADE(error, SVt_PV);
364 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
367 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
371 # ifdef HAS_GETPAGESIZE
372 PL_mmap_page_size = getpagesize();
374 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
375 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
379 if (PL_mmap_page_size <= 0)
380 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
381 (IV) PL_mmap_page_size);
383 #endif /* HAS_MMAP */
385 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
386 PL_timesbase.tms_utime = 0;
387 PL_timesbase.tms_stime = 0;
388 PL_timesbase.tms_cutime = 0;
389 PL_timesbase.tms_cstime = 0;
396 =for apidoc nothreadhook
398 Stub that provides thread hook for perl_destruct when there are
405 Perl_nothreadhook(pTHX)
411 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
413 Perl_dump_sv_child(pTHX_ SV *sv)
416 const int sock = PL_dumper_fd;
417 const int debug_fd = PerlIO_fileno(Perl_debug_log);
418 union control_un control;
421 struct cmsghdr *cmptr;
423 unsigned char buffer[256];
425 if(sock == -1 || debug_fd == -1)
428 PerlIO_flush(Perl_debug_log);
430 /* All these shenanigans are to pass a file descriptor over to our child for
431 it to dump out to. We can't let it hold open the file descriptor when it
432 forks, as the file descriptor it will dump to can turn out to be one end
433 of pipe that some other process will wait on for EOF. (So as it would
434 be open, the wait would be forever. */
436 msg.msg_control = control.control;
437 msg.msg_controllen = sizeof(control.control);
438 /* We're a connected socket so we don't need a destination */
444 cmptr = CMSG_FIRSTHDR(&msg);
445 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
446 cmptr->cmsg_level = SOL_SOCKET;
447 cmptr->cmsg_type = SCM_RIGHTS;
448 *((int *)CMSG_DATA(cmptr)) = 1;
450 vec[0].iov_base = (void*)&sv;
451 vec[0].iov_len = sizeof(sv);
452 got = sendmsg(sock, &msg, 0);
455 perror("Debug leaking scalars parent sendmsg failed");
458 if(got < sizeof(sv)) {
459 perror("Debug leaking scalars parent short sendmsg");
463 /* Return protocol is
465 unsigned char: length of location string (0 for empty)
466 unsigned char*: string (not terminated)
468 vec[0].iov_base = (void*)&returned_errno;
469 vec[0].iov_len = sizeof(returned_errno);
470 vec[1].iov_base = buffer;
473 got = readv(sock, vec, 2);
476 perror("Debug leaking scalars parent read failed");
477 PerlIO_flush(PerlIO_stderr());
480 if(got < sizeof(returned_errno) + 1) {
481 perror("Debug leaking scalars parent short read");
482 PerlIO_flush(PerlIO_stderr());
487 got = read(sock, buffer + 1, *buffer);
489 perror("Debug leaking scalars parent read 2 failed");
490 PerlIO_flush(PerlIO_stderr());
495 perror("Debug leaking scalars parent short read 2");
496 PerlIO_flush(PerlIO_stderr());
501 if (returned_errno || *buffer) {
502 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
503 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
504 returned_errno, strerror(returned_errno));
510 =for apidoc perl_destruct
512 Shuts down a Perl interpreter. See L<perlembed>.
521 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
523 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
529 /* wait for all pseudo-forked children to finish */
530 PERL_WAIT_FOR_CHILDREN;
532 destruct_level = PL_perl_destruct_level;
535 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
537 const int i = atoi(s);
538 if (destruct_level < i)
544 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
550 if (PL_endav && !PL_minus_c)
551 call_list(PL_scopestack_ix, PL_endav);
557 /* Need to flush since END blocks can produce output */
560 if (CALL_FPTR(PL_threadhook)(aTHX)) {
561 /* Threads hook has vetoed further cleanup */
565 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
566 if (destruct_level != 0) {
567 /* Fork here to create a child. Our child's job is to preserve the
568 state of scalars prior to destruction, so that we can instruct it
569 to dump any scalars that we later find have leaked.
570 There's no subtlety in this code - it assumes POSIX, and it doesn't
574 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
575 perror("Debug leaking scalars socketpair failed");
581 perror("Debug leaking scalars fork failed");
585 /* We are the child */
586 const int sock = fd[1];
587 const int debug_fd = PerlIO_fileno(Perl_debug_log);
590 /* Our success message is an integer 0, and a char 0 */
591 static const char success[sizeof(int) + 1];
595 /* We need to close all other file descriptors otherwise we end up
596 with interesting hangs, where the parent closes its end of a
597 pipe, and sits waiting for (another) child to terminate. Only
598 that child never terminates, because it never gets EOF, because
599 we also have the far end of the pipe open. We even need to
600 close the debugging fd, because sometimes it happens to be one
601 end of a pipe, and a process is waiting on the other end for
602 EOF. Normally it would be closed at some point earlier in
603 destruction, but if we happen to cause the pipe to remain open,
604 EOF never occurs, and we get an infinite hang. Hence all the
605 games to pass in a file descriptor if it's actually needed. */
607 f = sysconf(_SC_OPEN_MAX);
609 where = "sysconf failed";
620 union control_un control;
623 struct cmsghdr *cmptr;
627 msg.msg_control = control.control;
628 msg.msg_controllen = sizeof(control.control);
629 /* We're a connected socket so we don't need a source */
633 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
635 vec[0].iov_base = (void*)⌖
636 vec[0].iov_len = sizeof(target);
638 got = recvmsg(sock, &msg, 0);
643 where = "recv failed";
646 if(got < sizeof(target)) {
647 where = "short recv";
651 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
655 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
656 where = "wrong cmsg_len";
659 if(cmptr->cmsg_level != SOL_SOCKET) {
660 where = "wrong cmsg_level";
663 if(cmptr->cmsg_type != SCM_RIGHTS) {
664 where = "wrong cmsg_type";
668 got_fd = *(int*)CMSG_DATA(cmptr);
669 /* For our last little bit of trickery, put the file descriptor
670 back into Perl_debug_log, as if we never actually closed it
672 if(got_fd != debug_fd) {
673 if (dup2(got_fd, debug_fd) == -1) {
680 PerlIO_flush(Perl_debug_log);
682 got = write(sock, &success, sizeof(success));
685 where = "write failed";
688 if(got < sizeof(success)) {
689 where = "short write";
696 int send_errno = errno;
697 unsigned char length = (unsigned char) strlen(where);
698 struct iovec failure[3] = {
699 {(void*)&send_errno, sizeof(send_errno)},
701 {(void*)where, length}
703 int got = writev(sock, failure, 3);
704 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
705 in the parent if we try to read from the socketpair after the
706 child has exited, even if there was data to read.
707 So sleep a bit to give the parent a fighting chance of
710 _exit((got == -1) ? errno : 0);
714 PL_dumper_fd = fd[0];
719 /* We must account for everything. */
721 /* Destroy the main CV and syntax tree */
722 /* Do this now, because destroying ops can cause new SVs to be generated
723 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
724 PL_curcop to point to a valid op from which the filename structure
726 PL_curcop = &PL_compiling;
728 /* ensure comppad/curpad to refer to main's pad */
729 if (CvPADLIST(PL_main_cv)) {
730 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
732 op_free(PL_main_root);
735 PL_main_start = NULL;
736 SvREFCNT_dec(PL_main_cv);
740 /* Tell PerlIO we are about to tear things apart in case
741 we have layers which are using resources that should
745 PerlIO_destruct(aTHX);
747 if (PL_sv_objcount) {
749 * Try to destruct global references. We do this first so that the
750 * destructors and destructees still exist. Some sv's might remain.
751 * Non-referenced objects are on their own.
755 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
756 PL_defoutgv = NULL; /* may have been freed */
759 /* unhook hooks which will soon be, or use, destroyed data */
760 SvREFCNT_dec(PL_warnhook);
762 SvREFCNT_dec(PL_diehook);
765 /* call exit list functions */
766 while (PL_exitlistlen-- > 0)
767 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
769 Safefree(PL_exitlist);
774 if (destruct_level == 0){
776 DEBUG_P(debprofdump());
778 #if defined(PERLIO_LAYERS)
779 /* No more IO - including error messages ! */
780 PerlIO_cleanup(aTHX);
783 /* The exit() function will do everything that needs doing. */
787 /* jettison our possibly duplicated environment */
788 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
789 * so we certainly shouldn't free it here
792 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
793 if (environ != PL_origenviron && !PL_use_safe_putenv
795 /* only main thread can free environ[0] contents */
796 && PL_curinterp == aTHX
802 for (i = 0; environ[i]; i++)
803 safesysfree(environ[i]);
805 /* Must use safesysfree() when working with environ. */
806 safesysfree(environ);
808 environ = PL_origenviron;
811 #endif /* !PERL_MICRO */
813 /* reset so print() ends up where we expect */
817 /* the syntax tree is shared between clones
818 * so op_free(PL_main_root) only ReREFCNT_dec's
819 * REGEXPs in the parent interpreter
820 * we need to manually ReREFCNT_dec for the clones
823 I32 i = AvFILLp(PL_regex_padav) + 1;
824 SV * const * const ary = AvARRAY(PL_regex_padav);
827 SV * const resv = ary[--i];
829 if (SvFLAGS(resv) & SVf_BREAK) {
830 /* this is PL_reg_curpm, already freed
831 * flag is set in regexec.c:S_regtry
833 SvFLAGS(resv) &= ~SVf_BREAK;
835 else if(SvREPADTMP(resv)) {
836 SvREPADTMP_off(resv);
838 else if(SvIOKp(resv)) {
839 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec((SV*) PL_stashcache);
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
855 (void)PerlIO_close(PL_rsfp);
859 /* Filters for program text */
860 SvREFCNT_dec(PL_rsfp_filters);
861 PL_rsfp_filters = NULL;
864 PL_preprocess = FALSE;
870 PL_doswitches = FALSE;
871 PL_dowarn = G_WARN_OFF;
872 PL_doextract = FALSE;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_e_script);
887 /* magical thingies */
889 SvREFCNT_dec(PL_ofs_sv); /* $, */
892 SvREFCNT_dec(PL_ors_sv); /* $\ */
895 SvREFCNT_dec(PL_rs); /* $/ */
898 PL_multiline = 0; /* $* */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
908 /* clean up after study() */
909 SvREFCNT_dec(PL_lastscream);
910 PL_lastscream = NULL;
911 Safefree(PL_screamfirst);
913 Safefree(PL_screamnext);
917 Safefree(PL_efloatbuf);
921 /* startup and shutdown function lists */
922 SvREFCNT_dec(PL_beginav);
923 SvREFCNT_dec(PL_beginav_save);
924 SvREFCNT_dec(PL_endav);
925 SvREFCNT_dec(PL_checkav);
926 SvREFCNT_dec(PL_checkav_save);
927 SvREFCNT_dec(PL_initav);
929 PL_beginav_save = NULL;
932 PL_checkav_save = NULL;
935 /* shortcuts just get cleared */
944 PL_last_in_gv = NULL;
952 PL_DBassertion = NULL;
957 SvREFCNT_dec(PL_argvout_stack);
958 PL_argvout_stack = NULL;
960 SvREFCNT_dec(PL_modglobal);
962 SvREFCNT_dec(PL_preambleav);
963 PL_preambleav = NULL;
964 SvREFCNT_dec(PL_subname);
966 SvREFCNT_dec(PL_linestr);
968 #ifdef PERL_USES_PL_PIDSTATUS
969 SvREFCNT_dec(PL_pidstatus);
972 SvREFCNT_dec(PL_toptarget);
974 SvREFCNT_dec(PL_bodytarget);
975 PL_bodytarget = NULL;
976 PL_formtarget = NULL;
978 /* free locale stuff */
979 #ifdef USE_LOCALE_COLLATE
980 Safefree(PL_collation_name);
981 PL_collation_name = NULL;
984 #ifdef USE_LOCALE_NUMERIC
985 Safefree(PL_numeric_name);
986 PL_numeric_name = NULL;
987 SvREFCNT_dec(PL_numeric_radix_sv);
988 PL_numeric_radix_sv = NULL;
991 /* clear utf8 character classes */
992 SvREFCNT_dec(PL_utf8_alnum);
993 SvREFCNT_dec(PL_utf8_alnumc);
994 SvREFCNT_dec(PL_utf8_ascii);
995 SvREFCNT_dec(PL_utf8_alpha);
996 SvREFCNT_dec(PL_utf8_space);
997 SvREFCNT_dec(PL_utf8_cntrl);
998 SvREFCNT_dec(PL_utf8_graph);
999 SvREFCNT_dec(PL_utf8_digit);
1000 SvREFCNT_dec(PL_utf8_upper);
1001 SvREFCNT_dec(PL_utf8_lower);
1002 SvREFCNT_dec(PL_utf8_print);
1003 SvREFCNT_dec(PL_utf8_punct);
1004 SvREFCNT_dec(PL_utf8_xdigit);
1005 SvREFCNT_dec(PL_utf8_mark);
1006 SvREFCNT_dec(PL_utf8_toupper);
1007 SvREFCNT_dec(PL_utf8_totitle);
1008 SvREFCNT_dec(PL_utf8_tolower);
1009 SvREFCNT_dec(PL_utf8_tofold);
1010 SvREFCNT_dec(PL_utf8_idstart);
1011 SvREFCNT_dec(PL_utf8_idcont);
1012 PL_utf8_alnum = NULL;
1013 PL_utf8_alnumc = NULL;
1014 PL_utf8_ascii = NULL;
1015 PL_utf8_alpha = NULL;
1016 PL_utf8_space = NULL;
1017 PL_utf8_cntrl = NULL;
1018 PL_utf8_graph = NULL;
1019 PL_utf8_digit = NULL;
1020 PL_utf8_upper = NULL;
1021 PL_utf8_lower = NULL;
1022 PL_utf8_print = NULL;
1023 PL_utf8_punct = NULL;
1024 PL_utf8_xdigit = NULL;
1025 PL_utf8_mark = NULL;
1026 PL_utf8_toupper = NULL;
1027 PL_utf8_totitle = NULL;
1028 PL_utf8_tolower = NULL;
1029 PL_utf8_tofold = NULL;
1030 PL_utf8_idstart = NULL;
1031 PL_utf8_idcont = NULL;
1033 if (!specialWARN(PL_compiling.cop_warnings))
1034 SvREFCNT_dec(PL_compiling.cop_warnings);
1035 PL_compiling.cop_warnings = NULL;
1036 if (!specialCopIO(PL_compiling.cop_io))
1037 SvREFCNT_dec(PL_compiling.cop_io);
1038 PL_compiling.cop_io = NULL;
1039 CopFILE_free(&PL_compiling);
1040 CopSTASH_free(&PL_compiling);
1042 /* Prepare to destruct main symbol table. */
1047 SvREFCNT_dec(PL_curstname);
1048 PL_curstname = NULL;
1050 /* clear queued errors */
1051 SvREFCNT_dec(PL_errors);
1055 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1056 if (PL_scopestack_ix != 0)
1057 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1059 (long)PL_scopestack_ix);
1060 if (PL_savestack_ix != 0)
1061 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced saves: %ld more saves than restores\n",
1063 (long)PL_savestack_ix);
1064 if (PL_tmps_floor != -1)
1065 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1066 (long)PL_tmps_floor + 1);
1067 if (cxstack_ix != -1)
1068 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1069 (long)cxstack_ix + 1);
1072 /* Now absolutely destruct everything, somehow or other, loops or no. */
1073 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1074 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1076 /* the 2 is for PL_fdpid and PL_strtab */
1077 while (PL_sv_count > 2 && sv_clean_all())
1080 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1081 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1082 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1083 SvFLAGS(PL_strtab) |= SVt_PVHV;
1085 AvREAL_off(PL_fdpid); /* no surviving entries */
1086 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1089 #ifdef HAVE_INTERP_INTERN
1093 /* Destruct the global string table. */
1095 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1096 * so that sv_free() won't fail on them.
1097 * Now that the global string table is using a single hunk of memory
1098 * for both HE and HEK, we either need to explicitly unshare it the
1099 * correct way, or actually free things here.
1102 const I32 max = HvMAX(PL_strtab);
1103 HE * const * const array = HvARRAY(PL_strtab);
1104 HE *hent = array[0];
1107 if (hent && ckWARN_d(WARN_INTERNAL)) {
1108 HE * const next = HeNEXT(hent);
1109 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1110 "Unbalanced string table refcount: (%ld) for \"%s\"",
1111 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1118 hent = array[riter];
1123 HvARRAY(PL_strtab) = 0;
1124 HvTOTALKEYS(PL_strtab) = 0;
1125 HvFILL(PL_strtab) = 0;
1127 SvREFCNT_dec(PL_strtab);
1130 /* free the pointer tables used for cloning */
1131 ptr_table_free(PL_ptr_table);
1132 PL_ptr_table = (PTR_TBL_t*)NULL;
1135 /* free special SVs */
1137 SvREFCNT(&PL_sv_yes) = 0;
1138 sv_clear(&PL_sv_yes);
1139 SvANY(&PL_sv_yes) = NULL;
1140 SvFLAGS(&PL_sv_yes) = 0;
1142 SvREFCNT(&PL_sv_no) = 0;
1143 sv_clear(&PL_sv_no);
1144 SvANY(&PL_sv_no) = NULL;
1145 SvFLAGS(&PL_sv_no) = 0;
1149 for (i=0; i<=2; i++) {
1150 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1151 sv_clear(PERL_DEBUG_PAD(i));
1152 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1153 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1157 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1158 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1160 #ifdef DEBUG_LEAKING_SCALARS
1161 if (PL_sv_count != 0) {
1166 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1167 svend = &sva[SvREFCNT(sva)];
1168 for (sv = sva + 1; sv < svend; ++sv) {
1169 if (SvTYPE(sv) != SVTYPEMASK) {
1170 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1172 " refcnt=%"UVuf pTHX__FORMAT "\n"
1173 "\tallocated at %s:%d %s %s%s\n",
1174 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1175 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1177 sv->sv_debug_inpad ? "for" : "by",
1178 sv->sv_debug_optype ?
1179 PL_op_name[sv->sv_debug_optype]: "(none)",
1180 sv->sv_debug_cloned ? " (cloned)" : ""
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1183 Perl_dump_sv_child(aTHX_ sv);
1189 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1193 /* Wait for up to 4 seconds for child to terminate.
1194 This seems to be the least effort way of timing out on reaping
1196 struct timeval waitfor = {4, 0};
1197 int sock = PL_dumper_fd;
1201 FD_SET(sock, &rset);
1202 select(sock + 1, &rset, NULL, NULL, &waitfor);
1203 waitpid(child, &status, WNOHANG);
1211 #if defined(PERLIO_LAYERS)
1212 /* No more IO - including error messages ! */
1213 PerlIO_cleanup(aTHX);
1216 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1217 as currently layers use it rather than NULL as a marker
1218 for no arg - and will try and SvREFCNT_dec it.
1220 SvREFCNT(&PL_sv_undef) = 0;
1221 SvREADONLY_off(&PL_sv_undef);
1223 Safefree(PL_origfilename);
1224 PL_origfilename = NULL;
1225 Safefree(PL_reg_start_tmp);
1226 PL_reg_start_tmp = (char**)NULL;
1227 PL_reg_start_tmpl = 0;
1228 Safefree(PL_reg_curpm);
1229 Safefree(PL_reg_poscache);
1230 free_tied_hv_pool();
1231 Safefree(PL_op_mask);
1232 Safefree(PL_psig_ptr);
1233 PL_psig_ptr = (SV**)NULL;
1234 Safefree(PL_psig_name);
1235 PL_psig_name = (SV**)NULL;
1236 Safefree(PL_bitcount);
1238 Safefree(PL_psig_pend);
1239 PL_psig_pend = (int*)NULL;
1242 PL_tainting = FALSE;
1243 PL_taint_warn = FALSE;
1244 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1247 DEBUG_P(debprofdump());
1249 #ifdef USE_REENTRANT_API
1250 Perl_reentrant_free(aTHX);
1255 /* As the absolutely last thing, free the non-arena SV for mess() */
1258 /* we know that type == SVt_PVMG */
1260 /* it could have accumulated taint magic */
1263 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1264 moremagic = mg->mg_moremagic;
1265 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1267 Safefree(mg->mg_ptr);
1271 /* we know that type >= SVt_PV */
1272 SvPV_free(PL_mess_sv);
1273 Safefree(SvANY(PL_mess_sv));
1274 Safefree(PL_mess_sv);
1281 =for apidoc perl_free
1283 Releases a Perl interpreter. See L<perlembed>.
1291 #ifdef PERL_TRACK_MEMPOOL
1294 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1295 * value as we're probably hunting memory leaks then
1297 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1298 if (!s || atoi(s) == 0) {
1299 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1300 thread at thread exit. */
1301 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1302 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1307 #if defined(WIN32) || defined(NETWARE)
1308 # if defined(PERL_IMPLICIT_SYS)
1311 void *host = nw_internal_host;
1313 void *host = w32_internal_host;
1315 PerlMem_free(aTHXx);
1317 nw_delete_internal_host(host);
1319 win32_delete_internal_host(host);
1323 PerlMem_free(aTHXx);
1326 PerlMem_free(aTHXx);
1330 #if defined(USE_ITHREADS)
1331 /* provide destructors to clean up the thread key when libperl is unloaded */
1332 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1334 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1335 #pragma fini "perl_fini"
1339 #if defined(__GNUC__)
1340 __attribute__((destructor))
1350 #endif /* THREADS */
1353 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1356 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1357 PL_exitlist[PL_exitlistlen].fn = fn;
1358 PL_exitlist[PL_exitlistlen].ptr = ptr;
1362 #ifdef HAS_PROCSELFEXE
1363 /* This is a function so that we don't hold on to MAXPATHLEN
1364 bytes of stack longer than necessary
1367 S_procself_val(pTHX_ SV *sv, const char *arg0)
1369 char buf[MAXPATHLEN];
1370 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1372 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1373 includes a spurious NUL which will cause $^X to fail in system
1374 or backticks (this will prevent extensions from being built and
1375 many tests from working). readlink is not meant to add a NUL.
1376 Normal readlink works fine.
1378 if (len > 0 && buf[len-1] == '\0') {
1382 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1383 returning the text "unknown" from the readlink rather than the path
1384 to the executable (or returning an error from the readlink). Any valid
1385 path has a '/' in it somewhere, so use that to validate the result.
1386 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1388 if (len > 0 && memchr(buf, '/', len)) {
1389 sv_setpvn(sv,buf,len);
1395 #endif /* HAS_PROCSELFEXE */
1398 S_set_caret_X(pTHX) {
1400 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1402 #ifdef HAS_PROCSELFEXE
1403 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1406 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1408 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1415 =for apidoc perl_parse
1417 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1423 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1430 PERL_UNUSED_VAR(my_perl);
1432 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1435 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1436 setuid perl scripts securely.\n");
1437 #endif /* IAMSUID */
1440 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1441 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1442 * This MUST be done before any hash stores or fetches take place.
1443 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1444 * yourself, it is your responsibility to provide a good random seed!
1445 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1446 if (!PL_rehash_seed_set)
1447 PL_rehash_seed = get_hash_seed();
1449 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1451 if (s && (atoi(s) == 1))
1452 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1454 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1459 if (PL_origalen != 0) {
1460 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1463 /* Set PL_origalen be the sum of the contiguous argv[]
1464 * elements plus the size of the env in case that it is
1465 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1466 * as the maximum modifiable length of $0. In the worst case
1467 * the area we are able to modify is limited to the size of
1468 * the original argv[0]. (See below for 'contiguous', though.)
1470 const char *s = NULL;
1473 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1474 /* Do the mask check only if the args seem like aligned. */
1476 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1478 /* See if all the arguments are contiguous in memory. Note
1479 * that 'contiguous' is a loose term because some platforms
1480 * align the argv[] and the envp[]. If the arguments look
1481 * like non-aligned, assume that they are 'strictly' or
1482 * 'traditionally' contiguous. If the arguments look like
1483 * aligned, we just check that they are within aligned
1484 * PTRSIZE bytes. As long as no system has something bizarre
1485 * like the argv[] interleaved with some other data, we are
1486 * fine. (Did I just evoke Murphy's Law?) --jhi */
1487 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1489 for (i = 1; i < PL_origargc; i++) {
1490 if ((PL_origargv[i] == s + 1
1492 || PL_origargv[i] == s + 2
1497 (PL_origargv[i] > s &&
1499 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1509 /* Can we grab env area too to be used as the area for $0? */
1510 if (s && PL_origenviron) {
1511 if ((PL_origenviron[0] == s + 1
1513 || (PL_origenviron[0] == s + 9 && (s += 8))
1518 (PL_origenviron[0] > s &&
1519 PL_origenviron[0] <=
1520 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1524 s = PL_origenviron[0];
1527 my_setenv("NoNe SuCh", NULL);
1528 /* Force copy of environment. */
1529 for (i = 1; PL_origenviron[i]; i++) {
1530 if (PL_origenviron[i] == s + 1
1533 (PL_origenviron[i] > s &&
1534 PL_origenviron[i] <=
1535 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1538 s = PL_origenviron[i];
1546 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1551 /* Come here if running an undumped a.out. */
1553 PL_origfilename = savepv(argv[0]);
1554 PL_do_undump = FALSE;
1555 cxstack_ix = -1; /* start label stack again */
1557 assert (!PL_tainted);
1559 S_set_caret_X(aTHX);
1561 init_postdump_symbols(argc,argv,env);
1566 op_free(PL_main_root);
1567 PL_main_root = NULL;
1569 PL_main_start = NULL;
1570 SvREFCNT_dec(PL_main_cv);
1574 oldscope = PL_scopestack_ix;
1575 PL_dowarn = G_WARN_OFF;
1580 parse_body(env,xsinit);
1582 call_list(oldscope, PL_checkav);
1589 /* my_exit() was called */
1590 while (PL_scopestack_ix > oldscope)
1593 PL_curstash = PL_defstash;
1595 call_list(oldscope, PL_checkav);
1599 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1608 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1611 int argc = PL_origargc;
1612 char **argv = PL_origargv;
1613 const char *scriptname = NULL;
1614 VOL bool dosearch = FALSE;
1615 const char *validarg = "";
1618 const char *cddir = NULL;
1619 #ifdef USE_SITECUSTOMIZE
1620 bool minus_f = FALSE;
1623 sv_setpvn(PL_linestr,"",0);
1624 sv = newSVpvs(""); /* first used for -I flags */
1628 for (argc--,argv++; argc > 0; argc--,argv++) {
1629 if (argv[0][0] != '-' || !argv[0][1])
1633 validarg = " PHOOEY ";
1637 * Can we rely on the kernel to start scripts with argv[1] set to
1638 * contain all #! line switches (the whole line)? (argv[0] is set to
1639 * the interpreter name, argv[2] to the script name; argv[3] and
1640 * above may contain other arguments.)
1647 #ifndef PERL_STRICT_CR
1672 if ((s = moreswitches(s)))
1677 CHECK_MALLOC_TOO_LATE_FOR('t');
1678 if( !PL_tainting ) {
1679 PL_taint_warn = TRUE;
1685 CHECK_MALLOC_TOO_LATE_FOR('T');
1687 PL_taint_warn = FALSE;
1695 #ifdef MACOS_TRADITIONAL
1696 /* ignore -e for Dev:Pseudo argument */
1697 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1700 forbid_setid('e', -1);
1702 PL_e_script = newSVpvs("");
1703 filter_add(read_e_script, NULL);
1706 sv_catpv(PL_e_script, s);
1708 sv_catpv(PL_e_script, argv[1]);
1712 Perl_croak(aTHX_ "No code specified for -%c", *s);
1713 sv_catpvs(PL_e_script, "\n");
1717 #ifdef USE_SITECUSTOMIZE
1723 case 'I': /* -I handled both here and in moreswitches() */
1724 forbid_setid('I', -1);
1725 if (!*++s && (s=argv[1]) != NULL) {
1729 STRLEN len = strlen(s);
1730 const char * const p = savepvn(s, len);
1731 incpush(p, TRUE, TRUE, FALSE, FALSE);
1732 sv_catpvs(sv, "-I");
1733 sv_catpvn(sv, p, len);
1738 Perl_croak(aTHX_ "No directory specified for -I");
1741 forbid_setid('P', -1);
1742 PL_preprocess = TRUE;
1746 forbid_setid('S', -1);
1755 PL_preambleav = newAV();
1756 av_push(PL_preambleav,
1757 newSVpvs("use Config;"));
1761 opts_prog = newSVpvs("print Config::myconfig(),");
1763 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1765 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1767 opts = SvCUR(opts_prog);
1769 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1773 # ifdef DEBUG_LEAKING_SCALARS
1774 " DEBUG_LEAKING_SCALARS"
1776 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1777 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1779 # ifdef FAKE_THREADS
1782 # ifdef MULTIPLICITY
1791 # ifdef PERL_DONT_CREATE_GVSV
1792 " PERL_DONT_CREATE_GVSV"
1794 # ifdef PERL_GLOBAL_STRUCT
1795 " PERL_GLOBAL_STRUCT"
1797 # ifdef PERL_IMPLICIT_CONTEXT
1798 " PERL_IMPLICIT_CONTEXT"
1800 # ifdef PERL_IMPLICIT_SYS
1801 " PERL_IMPLICIT_SYS"
1806 # ifdef PERL_MALLOC_WRAP
1809 # ifdef PERL_NEED_APPCTX
1812 # ifdef PERL_NEED_TIMESBASE
1813 " PERL_NEED_TIMESBASE"
1815 # ifdef PERL_OLD_COPY_ON_WRITE
1816 " PERL_OLD_COPY_ON_WRITE"
1818 # ifdef PERL_TRACK_MEMPOOL
1819 " PERL_TRACK_MEMPOOL"
1821 # ifdef PERL_USE_SAFE_PUTENV
1822 " PERL_USE_SAFE_PUTENV"
1824 #ifdef PERL_USES_PL_PIDSTATUS
1825 " PERL_USES_PL_PIDSTATUS"
1827 # ifdef PL_OP_SLAB_ALLOC
1830 # ifdef THREADS_HAVE_PIDS
1831 " THREADS_HAVE_PIDS"
1833 # ifdef USE_64_BIT_ALL
1836 # ifdef USE_64_BIT_INT
1839 # ifdef USE_ITHREADS
1842 # ifdef USE_LARGE_FILES
1845 # ifdef USE_LONG_DOUBLE
1851 # ifdef USE_REENTRANT_API
1852 " USE_REENTRANT_API"
1857 # ifdef USE_SITECUSTOMIZE
1858 " USE_SITECUSTOMIZE"
1865 while (SvCUR(opts_prog) > opts+76) {
1866 /* find last space after "options: " and before col 76
1870 char * const pv = SvPV_nolen(opts_prog);
1871 const char c = pv[opts+76];
1873 space = strrchr(pv+opts+26, ' ');
1875 if (!space) break; /* "Can't happen" */
1877 /* break the line before that space */
1880 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1881 STR_WITH_LEN("\\n "));
1884 sv_catpvs(opts_prog,"\\n\",");
1886 #if defined(LOCAL_PATCH_COUNT)
1887 if (LOCAL_PATCH_COUNT > 0) {
1889 sv_catpvs(opts_prog,
1890 "\" Locally applied patches:\\n\",");
1891 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1892 if (PL_localpatches[i])
1893 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1894 0, PL_localpatches[i], 0);
1898 Perl_sv_catpvf(aTHX_ opts_prog,
1899 "\" Built under %s\\n\"",OSNAME);
1902 Perl_sv_catpvf(aTHX_ opts_prog,
1903 ",\" Compiled at %s %s\\n\"",__DATE__,
1906 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1910 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1911 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1912 "sort grep {/^PERL/} keys %ENV; ");
1914 sv_catpvs(opts_prog,
1915 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1917 sv_catpvs(opts_prog,
1918 "print \" \\%ENV:\\n @env\\n\" if @env;"
1919 "print \" \\@INC:\\n @INC\\n\";");
1923 opts_prog = Perl_newSVpvf(aTHX_
1924 "Config::config_vars(qw%c%s%c)",
1928 av_push(PL_preambleav, opts_prog);
1929 /* don't look for script or read stdin */
1930 scriptname = BIT_BUCKET;
1934 PL_doextract = TRUE;
1942 if (!*++s || isSPACE(*s)) {
1946 /* catch use of gnu style long options */
1947 if (strEQ(s, "version")) {
1951 if (strEQ(s, "help")) {
1958 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1964 #ifndef SECURE_INTERNAL_GETENV
1967 (s = PerlEnv_getenv("PERL5OPT")))
1969 const char *popt = s;
1972 if (*s == '-' && *(s+1) == 'T') {
1973 CHECK_MALLOC_TOO_LATE_FOR('T');
1975 PL_taint_warn = FALSE;
1978 char *popt_copy = NULL;
1991 if (!strchr("CDIMUdmtwA", *s))
1992 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1996 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1997 s = popt_copy + (s - popt);
1998 d = popt_copy + (d - popt);
2005 if( !PL_tainting ) {
2006 PL_taint_warn = TRUE;
2016 #ifdef USE_SITECUSTOMIZE
2019 PL_preambleav = newAV();
2020 av_unshift(PL_preambleav, 1);
2021 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2025 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2026 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2030 scriptname = argv[0];
2033 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2035 else if (scriptname == NULL) {
2037 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2043 /* Set $^X early so that it can be used for relocatable paths in @INC */
2044 assert (!PL_tainted);
2046 S_set_caret_X(aTHX);
2053 = open_script(scriptname, dosearch, sv, &suidscript);
2055 validate_suid(validarg, scriptname, fdscript, suidscript);
2058 # if defined(SIGCHLD) || defined(SIGCLD)
2061 # define SIGCHLD SIGCLD
2063 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2064 if (sigstate == (Sighandler_t) SIG_IGN) {
2065 if (ckWARN(WARN_SIGNAL))
2066 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2067 "Can't ignore signal CHLD, forcing to default");
2068 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2075 #ifdef MACOS_TRADITIONAL
2076 || gMacPerl_AlwaysExtract
2080 /* This will croak if suidscript is >= 0, as -x cannot be used with
2082 forbid_setid('x', suidscript);
2083 /* Hence you can't get here if suidscript >= 0 */
2086 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2087 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2091 PL_main_cv = PL_compcv = (CV*)newSV(0);
2092 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2093 CvUNIQUE_on(PL_compcv);
2095 CvPADLIST(PL_compcv) = pad_new(0);
2098 boot_core_UNIVERSAL();
2099 boot_core_xsutils();
2102 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2104 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2110 # ifdef HAS_SOCKS5_INIT
2111 socks5_init(argv[0]);
2117 init_predump_symbols();
2118 /* init_postdump_symbols not currently designed to be called */
2119 /* more than once (ENV isn't cleared first, for example) */
2120 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2122 init_postdump_symbols(argc,argv,env);
2124 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2125 * or explicitly in some platforms.
2126 * locale.c:Perl_init_i18nl10n() if the environment
2127 * look like the user wants to use UTF-8. */
2128 #if defined(__SYMBIAN32__)
2129 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2132 /* Requires init_predump_symbols(). */
2133 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2138 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2139 * and the default open disciplines. */
2140 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2141 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2143 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2144 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2145 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2147 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2148 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2149 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2151 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2152 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2153 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2155 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2156 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2159 sv_setpvn(sv, ":utf8\0:utf8", 11);
2161 sv_setpvn(sv, ":utf8\0", 6);
2164 sv_setpvn(sv, "\0:utf8", 6);
2170 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2171 if (strEQ(s, "unsafe"))
2172 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2173 else if (strEQ(s, "safe"))
2174 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2176 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2181 /* now parse the script */
2183 SETERRNO(0,SS_NORMAL);
2185 #ifdef MACOS_TRADITIONAL
2186 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2188 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2190 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2191 MacPerl_MPWFileName(PL_origfilename));
2195 if (yyparse() || PL_error_count) {
2197 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2199 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2204 CopLINE_set(PL_curcop, 0);
2205 PL_curstash = PL_defstash;
2206 PL_preprocess = FALSE;
2208 SvREFCNT_dec(PL_e_script);
2216 SAVECOPFILE(PL_curcop);
2217 SAVECOPLINE(PL_curcop);
2218 gv_check(PL_defstash);
2225 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2226 dump_mstats("after compilation:");
2235 =for apidoc perl_run
2237 Tells a Perl interpreter to run. See L<perlembed>.
2250 PERL_UNUSED_CONTEXT;
2252 oldscope = PL_scopestack_ix;
2260 cxstack_ix = -1; /* start context stack again */
2262 case 0: /* normal completion */
2266 case 2: /* my_exit() */
2267 while (PL_scopestack_ix > oldscope)
2270 PL_curstash = PL_defstash;
2271 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2272 PL_endav && !PL_minus_c)
2273 call_list(oldscope, PL_endav);
2275 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2276 dump_mstats("after execution: ");
2282 POPSTACK_TO(PL_mainstack);
2285 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2297 S_run_body(pTHX_ I32 oldscope)
2300 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2301 PL_sawampersand ? "Enabling" : "Omitting"));
2303 if (!PL_restartop) {
2304 DEBUG_x(dump_all());
2307 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2309 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2313 #ifdef MACOS_TRADITIONAL
2314 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2315 (gMacPerl_ErrorFormat ? "# " : ""),
2316 MacPerl_MPWFileName(PL_origfilename));
2318 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2322 if (PERLDB_SINGLE && PL_DBsingle)
2323 sv_setiv(PL_DBsingle, 1);
2325 call_list(oldscope, PL_initav);
2331 PL_op = PL_restartop;
2335 else if (PL_main_start) {
2336 CvDEPTH(PL_main_cv) = 1;
2337 PL_op = PL_main_start;
2345 =head1 SV Manipulation Functions
2347 =for apidoc p||get_sv
2349 Returns the SV of the specified Perl scalar. If C<create> is set and the
2350 Perl variable does not exist then it will be created. If C<create> is not
2351 set and the variable does not exist then NULL is returned.
2357 Perl_get_sv(pTHX_ const char *name, I32 create)
2360 gv = gv_fetchpv(name, create, SVt_PV);
2367 =head1 Array Manipulation Functions
2369 =for apidoc p||get_av
2371 Returns the AV of the specified Perl array. If C<create> is set and the
2372 Perl variable does not exist then it will be created. If C<create> is not
2373 set and the variable does not exist then NULL is returned.
2379 Perl_get_av(pTHX_ const char *name, I32 create)
2381 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2390 =head1 Hash Manipulation Functions
2392 =for apidoc p||get_hv
2394 Returns the HV of the specified Perl hash. If C<create> is set and the
2395 Perl variable does not exist then it will be created. If C<create> is not
2396 set and the variable does not exist then NULL is returned.
2402 Perl_get_hv(pTHX_ const char *name, I32 create)
2404 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2413 =head1 CV Manipulation Functions
2415 =for apidoc p||get_cv
2417 Returns the CV of the specified Perl subroutine. If C<create> is set and
2418 the Perl subroutine does not exist then it will be declared (which has the
2419 same effect as saying C<sub name;>). If C<create> is not set and the
2420 subroutine does not exist then NULL is returned.
2426 Perl_get_cv(pTHX_ const char *name, I32 create)
2428 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2429 /* XXX unsafe for threads if eval_owner isn't held */
2430 /* XXX this is probably not what they think they're getting.
2431 * It has the same effect as "sub name;", i.e. just a forward
2433 if (create && !GvCVu(gv))
2434 return newSUB(start_subparse(FALSE, 0),
2435 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2442 /* Be sure to refetch the stack pointer after calling these routines. */
2446 =head1 Callback Functions
2448 =for apidoc p||call_argv
2450 Performs a callback to the specified Perl sub. See L<perlcall>.
2456 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2458 /* See G_* flags in cop.h */
2459 /* null terminated arg list */
2467 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2472 return call_pv(sub_name, flags);
2476 =for apidoc p||call_pv
2478 Performs a callback to the specified Perl sub. See L<perlcall>.
2484 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2485 /* name of the subroutine */
2486 /* See G_* flags in cop.h */
2488 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2492 =for apidoc p||call_method
2494 Performs a callback to the specified Perl method. The blessed object must
2495 be on the stack. See L<perlcall>.
2501 Perl_call_method(pTHX_ const char *methname, I32 flags)
2502 /* name of the subroutine */
2503 /* See G_* flags in cop.h */
2505 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2508 /* May be called with any of a CV, a GV, or an SV containing the name. */
2510 =for apidoc p||call_sv
2512 Performs a callback to the Perl sub whose name is in the SV. See
2519 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2520 /* See G_* flags in cop.h */
2523 LOGOP myop; /* fake syntax tree node */
2526 volatile I32 retval = 0;
2528 bool oldcatch = CATCH_GET;
2530 OP* const oldop = PL_op;
2533 if (flags & G_DISCARD) {
2538 Zero(&myop, 1, LOGOP);
2539 myop.op_next = NULL;
2540 if (!(flags & G_NOARGS))
2541 myop.op_flags |= OPf_STACKED;
2542 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2543 (flags & G_ARRAY) ? OPf_WANT_LIST :
2548 EXTEND(PL_stack_sp, 1);
2549 *++PL_stack_sp = sv;
2551 oldscope = PL_scopestack_ix;
2553 if (PERLDB_SUB && PL_curstash != PL_debstash
2554 /* Handle first BEGIN of -d. */
2555 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2556 /* Try harder, since this may have been a sighandler, thus
2557 * curstash may be meaningless. */
2558 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2559 && !(flags & G_NODEBUG))
2560 PL_op->op_private |= OPpENTERSUB_DB;
2562 if (flags & G_METHOD) {
2563 Zero(&method_op, 1, UNOP);
2564 method_op.op_next = PL_op;
2565 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2566 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2567 PL_op = (OP*)&method_op;
2570 if (!(flags & G_EVAL)) {
2572 call_body((OP*)&myop, FALSE);
2573 retval = PL_stack_sp - (PL_stack_base + oldmark);
2574 CATCH_SET(oldcatch);
2577 myop.op_other = (OP*)&myop;
2579 /* we're trying to emulate pp_entertry() here */
2581 register PERL_CONTEXT *cx;
2582 const I32 gimme = GIMME_V;
2587 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2589 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2591 PL_in_eval = EVAL_INEVAL;
2592 if (flags & G_KEEPERR)
2593 PL_in_eval |= EVAL_KEEPERR;
2595 sv_setpvn(ERRSV,"",0);
2603 call_body((OP*)&myop, FALSE);
2604 retval = PL_stack_sp - (PL_stack_base + oldmark);
2605 if (!(flags & G_KEEPERR))
2606 sv_setpvn(ERRSV,"",0);
2612 /* my_exit() was called */
2613 PL_curstash = PL_defstash;
2616 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2617 Perl_croak(aTHX_ "Callback called exit");
2622 PL_op = PL_restartop;
2626 PL_stack_sp = PL_stack_base + oldmark;
2627 if (flags & G_ARRAY)
2631 *++PL_stack_sp = &PL_sv_undef;
2636 if (PL_scopestack_ix > oldscope) {
2640 register PERL_CONTEXT *cx;
2647 PERL_UNUSED_VAR(newsp);
2648 PERL_UNUSED_VAR(gimme);
2649 PERL_UNUSED_VAR(optype);
2654 if (flags & G_DISCARD) {
2655 PL_stack_sp = PL_stack_base + oldmark;
2665 S_call_body(pTHX_ const OP *myop, bool is_eval)
2668 if (PL_op == myop) {
2670 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2672 PL_op = Perl_pp_entersub(aTHX); /* this does */
2678 /* Eval a string. The G_EVAL flag is always assumed. */
2681 =for apidoc p||eval_sv
2683 Tells Perl to C<eval> the string in the SV.
2689 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2691 /* See G_* flags in cop.h */
2695 UNOP myop; /* fake syntax tree node */
2696 volatile I32 oldmark = SP - PL_stack_base;
2697 volatile I32 retval = 0;
2699 OP* const oldop = PL_op;
2702 if (flags & G_DISCARD) {
2709 Zero(PL_op, 1, UNOP);
2710 EXTEND(PL_stack_sp, 1);
2711 *++PL_stack_sp = sv;
2713 if (!(flags & G_NOARGS))
2714 myop.op_flags = OPf_STACKED;
2715 myop.op_next = NULL;
2716 myop.op_type = OP_ENTEREVAL;
2717 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2718 (flags & G_ARRAY) ? OPf_WANT_LIST :
2720 if (flags & G_KEEPERR)
2721 myop.op_flags |= OPf_SPECIAL;
2723 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2724 * before a PUSHEVAL, which corrupts the stack after a croak */
2725 TAINT_PROPER("eval_sv()");
2731 call_body((OP*)&myop,TRUE);
2732 retval = PL_stack_sp - (PL_stack_base + oldmark);
2733 if (!(flags & G_KEEPERR))
2734 sv_setpvn(ERRSV,"",0);
2740 /* my_exit() was called */
2741 PL_curstash = PL_defstash;
2744 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2745 Perl_croak(aTHX_ "Callback called exit");
2750 PL_op = PL_restartop;
2754 PL_stack_sp = PL_stack_base + oldmark;
2755 if (flags & G_ARRAY)
2759 *++PL_stack_sp = &PL_sv_undef;
2765 if (flags & G_DISCARD) {
2766 PL_stack_sp = PL_stack_base + oldmark;
2776 =for apidoc p||eval_pv
2778 Tells Perl to C<eval> the given string and return an SV* result.
2784 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2788 SV* sv = newSVpv(p, 0);
2790 eval_sv(sv, G_SCALAR);
2797 if (croak_on_error && SvTRUE(ERRSV)) {
2798 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2804 /* Require a module. */
2807 =head1 Embedding Functions
2809 =for apidoc p||require_pv
2811 Tells Perl to C<require> the file named by the string argument. It is
2812 analogous to the Perl code C<eval "require '$file'">. It's even
2813 implemented that way; consider using load_module instead.
2818 Perl_require_pv(pTHX_ const char *pv)
2823 PUSHSTACKi(PERLSI_REQUIRE);
2825 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2826 eval_sv(sv_2mortal(sv), G_DISCARD);
2832 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2834 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2837 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2841 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2843 /* This message really ought to be max 23 lines.
2844 * Removed -h because the user already knows that option. Others? */
2846 static const char * const usage_msg[] = {
2847 "-0[octal] specify record separator (\\0, if no argument)",
2848 "-A[mod][=pattern] activate all/given assertions",
2849 "-a autosplit mode with -n or -p (splits $_ into @F)",
2850 "-C[number/list] enables the listed Unicode features",
2851 "-c check syntax only (runs BEGIN and CHECK blocks)",
2852 "-d[:debugger] run program under debugger",
2853 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2854 "-e program one line of program (several -e's allowed, omit programfile)",
2855 "-E program like -e, but enables all optional features",
2856 "-f don't do $sitelib/sitecustomize.pl at startup",
2857 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2858 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2859 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2860 "-l[octal] enable line ending processing, specifies line terminator",
2861 "-[mM][-]module execute \"use/no module...\" before executing program",
2862 "-n assume \"while (<>) { ... }\" loop around program",
2863 "-p assume loop like -n but print line also, like sed",
2864 "-P run program through C preprocessor before compilation",
2865 "-s enable rudimentary parsing for switches after programfile",
2866 "-S look for programfile using PATH environment variable",
2867 "-t enable tainting warnings",
2868 "-T enable tainting checks",
2869 "-u dump core after parsing program",
2870 "-U allow unsafe operations",
2871 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2872 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2873 "-w enable many useful warnings (RECOMMENDED)",
2874 "-W enable all warnings",
2875 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2876 "-X disable all warnings",
2880 const char * const *p = usage_msg;
2882 PerlIO_printf(PerlIO_stdout(),
2883 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2886 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2889 /* convert a string of -D options (or digits) into an int.
2890 * sets *s to point to the char after the options */
2894 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2896 static const char * const usage_msgd[] = {
2897 " Debugging flag values: (see also -d)",
2898 " p Tokenizing and parsing (with v, displays parse stack)",
2899 " s Stack snapshots (with v, displays all stacks)",
2900 " l Context (loop) stack processing",
2901 " t Trace execution",
2902 " o Method and overloading resolution",
2903 " c String/numeric conversions",
2904 " P Print profiling info, preprocessor command for -P, source file input state",
2905 " m Memory allocation",
2906 " f Format processing",
2907 " r Regular expression parsing and execution",
2908 " x Syntax tree dump",
2909 " u Tainting checks",
2910 " H Hash dump -- usurps values()",
2911 " X Scratchpad allocation",
2913 " S Thread synchronization",
2915 " R Include reference counts of dumped variables (eg when using -Ds)",
2916 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2917 " v Verbose: use in conjunction with other flags",
2919 " A Consistency checks on internal structures",
2920 " q quiet - currently only suppresses the 'EXECUTING' message",
2925 /* if adding extra options, remember to update DEBUG_MASK */
2926 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2928 for (; isALNUM(**s); (*s)++) {
2929 const char * const d = strchr(debopts,**s);
2931 i |= 1 << (d - debopts);
2932 else if (ckWARN_d(WARN_DEBUGGING))
2933 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2934 "invalid option -D%c, use -D'' to see choices\n", **s);
2937 else if (isDIGIT(**s)) {
2939 for (; isALNUM(**s); (*s)++) ;
2941 else if (givehelp) {
2942 const char *const *p = usage_msgd;
2943 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2946 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2947 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2948 "-Dp not implemented on this platform\n");
2954 /* This routine handles any switches that can be given during run */
2957 Perl_moreswitches(pTHX_ char *s)
2968 SvREFCNT_dec(PL_rs);
2969 if (s[1] == 'x' && s[2]) {
2970 const char *e = s+=2;
2976 flags = PERL_SCAN_SILENT_ILLDIGIT;
2977 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2978 if (s + numlen < e) {
2979 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2983 PL_rs = newSVpvs("");
2984 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2985 tmps = (U8*)SvPVX(PL_rs);
2986 uvchr_to_utf8(tmps, rschar);
2987 SvCUR_set(PL_rs, UNISKIP(rschar));
2992 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2993 if (rschar & ~((U8)~0))
2994 PL_rs = &PL_sv_undef;
2995 else if (!rschar && numlen >= 2)
2996 PL_rs = newSVpvs("");
2998 char ch = (char)rschar;
2999 PL_rs = newSVpvn(&ch, 1);
3002 sv_setsv(get_sv("/", TRUE), PL_rs);
3007 PL_unicode = parse_unicode_opts( (const char **)&s );
3012 while (*s && !isSPACE(*s)) ++s;
3014 PL_splitstr = savepv(PL_splitstr);
3025 forbid_setid('d', -1);
3028 /* -dt indicates to the debugger that threads will be used */
3029 if (*s == 't' && !isALNUM(s[1])) {
3031 my_setenv("PERL5DB_THREADED", "1");
3034 /* The following permits -d:Mod to accepts arguments following an =
3035 in the fashion that -MSome::Mod does. */
3036 if (*s == ':' || *s == '=') {
3038 SV * const sv = newSVpvs("use Devel::");
3040 /* We now allow -d:Module=Foo,Bar */
3041 while(isALNUM(*s) || *s==':') ++s;
3043 sv_catpv(sv, start);
3045 sv_catpvn(sv, start, s-start);
3046 /* Don't use NUL as q// delimiter here, this string goes in the
3048 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3051 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3054 PL_perldb = PERLDB_ALL;
3061 forbid_setid('D', -1);
3063 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3064 #else /* !DEBUGGING */
3065 if (ckWARN_d(WARN_DEBUGGING))
3066 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3067 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3068 for (s++; isALNUM(*s); s++) ;
3073 usage(PL_origargv[0]);
3076 Safefree(PL_inplace);
3077 #if defined(__CYGWIN__) /* do backup extension automagically */
3078 if (*(s+1) == '\0') {
3079 PL_inplace = savepvs(".bak");
3082 #endif /* __CYGWIN__ */
3083 PL_inplace = savepv(s+1);
3084 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3088 if (*s == '-') /* Additional switches on #! line. */
3092 case 'I': /* -I handled both here and in parse_body() */
3093 forbid_setid('I', -1);
3095 while (*s && isSPACE(*s))
3100 /* ignore trailing spaces (possibly followed by other switches) */
3102 for (e = p; *e && !isSPACE(*e); e++) ;
3106 } while (*p && *p != '-');
3107 e = savepvn(s, e-s);
3108 incpush(e, TRUE, TRUE, FALSE, FALSE);
3115 Perl_croak(aTHX_ "No directory specified for -I");
3121 SvREFCNT_dec(PL_ors_sv);
3127 PL_ors_sv = newSVpvs("\n");
3128 numlen = 3 + (*s == '0');
3129 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3133 if (RsPARA(PL_rs)) {
3134 PL_ors_sv = newSVpvs("\n\n");
3137 PL_ors_sv = newSVsv(PL_rs);
3142 forbid_setid('A', -1);
3144 PL_preambleav = newAV();
3147 char * const start = s;
3148 SV * const sv = newSVpvs("use assertions::activate");
3149 while(isALNUM(*s) || *s == ':') ++s;
3151 sv_catpvs(sv, "::");
3152 sv_catpvn(sv, start, s-start);
3155 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3158 else if (*s != '\0') {
3159 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3161 av_push(PL_preambleav, sv);
3165 forbid_setid('M', -1); /* XXX ? */
3168 forbid_setid('m', -1); /* XXX ? */
3172 const char *use = "use ";
3173 /* -M-foo == 'no foo' */
3174 /* Leading space on " no " is deliberate, to make both
3175 possibilities the same length. */
3176 if (*s == '-') { use = " no "; ++s; }
3177 sv = newSVpvn(use,4);
3179 /* We allow -M'Module qw(Foo Bar)' */
3180 while(isALNUM(*s) || *s==':') ++s;
3182 sv_catpv(sv, start);
3183 if (*(start-1) == 'm') {
3185 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3186 sv_catpvs( sv, " ()");
3190 Perl_croak(aTHX_ "Module name required with -%c option",
3192 sv_catpvn(sv, start, s-start);
3193 sv_catpvs(sv, " split(/,/,q");
3194 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3196 sv_catpvs(sv, "\0)");
3200 PL_preambleav = newAV();
3201 av_push(PL_preambleav, sv);
3204 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3215 forbid_setid('s', -1);
3216 PL_doswitches = TRUE;
3230 #ifdef MACOS_TRADITIONAL
3231 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3233 PL_do_undump = TRUE;
3241 if (!sv_derived_from(PL_patchlevel, "version"))
3242 upg_version(PL_patchlevel);
3244 PerlIO_printf(PerlIO_stdout(),
3245 Perl_form(aTHX_ "\nThis is perl, %"SVf
3246 #ifdef PERL_PATCHNUM
3247 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3250 vstringify(PL_patchlevel),
3253 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3254 PerlIO_printf(PerlIO_stdout(),
3255 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3256 vstringify(PL_patchlevel)));
3257 PerlIO_printf(PerlIO_stdout(),
3258 Perl_form(aTHX_ " built under %s at %s %s\n",
3259 OSNAME, __DATE__, __TIME__));
3260 PerlIO_printf(PerlIO_stdout(),
3261 Perl_form(aTHX_ " OS Specific Release: %s\n",
3265 #if defined(LOCAL_PATCH_COUNT)
3266 if (LOCAL_PATCH_COUNT > 0)
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\n(with %d registered patch%s, "
3269 "see perl -V for more detail)",
3270 (int)LOCAL_PATCH_COUNT,
3271 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3274 PerlIO_printf(PerlIO_stdout(),
3275 "\n\nCopyright 1987-2006, Larry Wall\n");
3276 #ifdef MACOS_TRADITIONAL
3277 PerlIO_printf(PerlIO_stdout(),
3278 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3279 "maintained by Chris Nandor\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3288 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3293 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "atariST series port, ++jrb bammi@cadence.com\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3308 PerlIO_printf(PerlIO_stdout(),
3309 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3312 PerlIO_printf(PerlIO_stdout(),
3313 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3316 PerlIO_printf(PerlIO_stdout(),
3317 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3320 PerlIO_printf(PerlIO_stdout(),
3321 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3324 PerlIO_printf(PerlIO_stdout(),
3325 "MiNT port by Guido Flohr, 1997-1999\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "EPOC port by Olaf Flebbe, 1999-2002\n");
3332 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3333 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3336 #ifdef __SYMBIAN32__
3337 PerlIO_printf(PerlIO_stdout(),
3338 "Symbian port by Nokia, 2004-2005\n");
3340 #ifdef BINARY_BUILD_NOTICE
3341 BINARY_BUILD_NOTICE;
3343 PerlIO_printf(PerlIO_stdout(),
3345 Perl may be copied only under the terms of either the Artistic License or the\n\
3346 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3347 Complete documentation for Perl, including FAQ lists, should be found on\n\
3348 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3349 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3352 if (! (PL_dowarn & G_WARN_ALL_MASK))
3353 PL_dowarn |= G_WARN_ON;
3357 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3358 if (!specialWARN(PL_compiling.cop_warnings))
3359 SvREFCNT_dec(PL_compiling.cop_warnings);
3360 PL_compiling.cop_warnings = pWARN_ALL ;
3364 PL_dowarn = G_WARN_ALL_OFF;
3365 if (!specialWARN(PL_compiling.cop_warnings))
3366 SvREFCNT_dec(PL_compiling.cop_warnings);
3367 PL_compiling.cop_warnings = pWARN_NONE ;
3372 if (s[1] == '-') /* Additional switches on #! line. */
3377 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3383 #ifdef ALTERNATE_SHEBANG
3384 case 'S': /* OS/2 needs -S on "extproc" line. */
3392 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3397 /* compliments of Tom Christiansen */
3399 /* unexec() can be found in the Gnu emacs distribution */
3400 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3403 Perl_my_unexec(pTHX)
3405 PERL_UNUSED_CONTEXT;
3407 SV * prog = newSVpv(BIN_EXP, 0);
3408 SV * file = newSVpv(PL_origfilename, 0);
3412 sv_catpvs(prog, "/perl");
3413 sv_catpvs(file, ".perldump");
3415 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3416 /* unexec prints msg to stderr in case of failure */
3417 PerlProc_exit(status);
3420 # include <lib$routines.h>
3421 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3422 # elif defined(WIN32) || defined(__CYGWIN__)
3423 Perl_croak(aTHX_ "dump is not supported");
3425 ABORT(); /* for use with undump */
3430 /* initialize curinterp */
3436 # define PERLVAR(var,type)
3437 # define PERLVARA(var,n,type)
3438 # if defined(PERL_IMPLICIT_CONTEXT)
3439 # define PERLVARI(var,type,init) aTHX->var = init;
3440 # define PERLVARIC(var,type,init) aTHX->var = init;
3442 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3443 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3445 # include "intrpvar.h"
3446 # include "thrdvar.h"
3452 # define PERLVAR(var,type)
3453 # define PERLVARA(var,n,type)
3454 # define PERLVARI(var,type,init) PL_##var = init;
3455 # define PERLVARIC(var,type,init) PL_##var = init;
3456 # include "intrpvar.h"
3457 # include "thrdvar.h"
3467 S_init_main_stash(pTHX)
3472 PL_curstash = PL_defstash = newHV();
3473 /* We know that the string "main" will be in the global shared string
3474 table, so it's a small saving to use it rather than allocate another
3476 PL_curstname = newSVpvs_share("main");
3477 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3478 /* If we hadn't caused another reference to "main" to be in the shared
3479 string table above, then it would be worth reordering these two,
3480 because otherwise all we do is delete "main" from it as a consequence
3481 of the SvREFCNT_dec, only to add it again with hv_name_set */
3482 SvREFCNT_dec(GvHV(gv));
3483 hv_name_set(PL_defstash, "main", 4, 0);
3484 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3486 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3488 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3489 GvMULTI_on(PL_incgv);
3490 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3491 GvMULTI_on(PL_hintgv);
3492 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3493 SvREFCNT_inc_simple(PL_defgv);
3494 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3495 SvREFCNT_inc_simple(PL_errgv);
3496 GvMULTI_on(PL_errgv);
3497 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3498 GvMULTI_on(PL_replgv);
3499 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3500 #ifdef PERL_DONT_CREATE_GVSV
3503 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3504 sv_setpvn(ERRSV, "", 0);
3505 PL_curstash = PL_defstash;
3506 CopSTASH_set(&PL_compiling, PL_defstash);
3507 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3508 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3510 /* We must init $/ before switches are processed. */
3511 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3515 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3521 const char *cpp_discard_flag;
3530 PL_origfilename = savepvs("-e");
3533 /* if find_script() returns, it returns a malloc()-ed value */
3534 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3536 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3537 const char *s = scriptname + 8;
3543 * Tell apart "normal" usage of fdscript, e.g.
3544 * with bash on FreeBSD:
3545 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3546 * from usage in suidperl.
3547 * Does any "normal" usage leave garbage after the number???
3548 * Is it a mistake to use a similar /dev/fd/ construct for
3553 * Be supersafe and do some sanity-checks.
3554 * Still, can we be sure we got the right thing?
3557 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3560 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3562 scriptname = savepv(s + 1);
3563 Safefree(PL_origfilename);
3564 PL_origfilename = (char *)scriptname;
3569 CopFILE_free(PL_curcop);
3570 CopFILE_set(PL_curcop, PL_origfilename);
3571 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3572 scriptname = (char *)"";
3573 if (fdscript >= 0) {
3574 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3575 # if defined(HAS_FCNTL) && defined(F_SETFD)
3577 /* ensure close-on-exec */
3578 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3583 Perl_croak(aTHX_ "sperl needs fd script\n"
3584 "You should not call sperl directly; do you need to "
3585 "change a #! line\nfrom sperl to perl?\n");
3588 * Do not open (or do other fancy stuff) while setuid.
3589 * Perl does the open, and hands script to suidperl on a fd;
3590 * suidperl only does some checks, sets up UIDs and re-execs
3591 * perl with that fd as it has always done.
3594 if (*suidscript != 1) {
3595 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3598 else if (PL_preprocess) {
3599 const char * const cpp_cfg = CPPSTDIN;
3600 SV * const cpp = newSVpvs("");
3601 SV * const cmd = newSV(0);
3603 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3604 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3605 if (strEQ(cpp_cfg, "cppstdin"))
3606 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3607 sv_catpv(cpp, cpp_cfg);
3610 sv_catpvs(sv, "-I");
3611 sv_catpv(sv,PRIVLIB_EXP);
3614 DEBUG_P(PerlIO_printf(Perl_debug_log,
3615 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3616 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3619 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3626 cpp_discard_flag = "";
3628 cpp_discard_flag = "-C";
3632 perl = os2_execname(aTHX);
3634 perl = PL_origargv[0];
3638 /* This strips off Perl comments which might interfere with
3639 the C pre-processor, including #!. #line directives are
3640 deliberately stripped to avoid confusion with Perl's version
3641 of #line. FWP played some golf with it so it will fit
3642 into VMS's 255 character buffer.
3645 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3647 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3649 Perl_sv_setpvf(aTHX_ cmd, "\
3650 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3651 perl, quote, code, quote, scriptname, cpp,
3652 cpp_discard_flag, sv, CPPMINUS);
3654 PL_doextract = FALSE;
3656 DEBUG_P(PerlIO_printf(Perl_debug_log,
3657 "PL_preprocess: cmd=\"%s\"\n",
3660 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3664 else if (!*scriptname) {
3665 forbid_setid(0, *suidscript);
3666 PL_rsfp = PerlIO_stdin();
3669 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3670 # if defined(HAS_FCNTL) && defined(F_SETFD)
3672 /* ensure close-on-exec */
3673 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3676 #endif /* IAMSUID */
3678 /* PSz 16 Sep 03 Keep neat error message */
3680 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3682 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3683 CopFILE(PL_curcop), Strerror(errno));
3689 * I_SYSSTATVFS HAS_FSTATVFS
3691 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3692 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3693 * here so that metaconfig picks them up. */
3697 S_fd_on_nosuid_fs(pTHX_ int fd)
3700 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3701 * but is needed also on machines without setreuid.
3702 * Seems safe enough to run as root.
3704 int check_okay = 0; /* able to do all the required sys/libcalls */
3705 int on_nosuid = 0; /* the fd is on a nosuid fs */
3707 * Need to check noexec also: nosuid might not be set, the average
3708 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3710 int on_noexec = 0; /* the fd is on a noexec fs */
3713 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3714 * fstatvfs() is UNIX98.
3715 * fstatfs() is 4.3 BSD.
3716 * ustat()+getmnt() is pre-4.3 BSD.
3717 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3718 * an irrelevant filesystem while trying to reach the right one.
3721 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3723 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3724 defined(HAS_FSTATVFS)
3725 # define FD_ON_NOSUID_CHECK_OKAY
3726 struct statvfs stfs;
3728 check_okay = fstatvfs(fd, &stfs) == 0;
3729 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3731 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3732 on platforms where it is present. */
3733 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3735 # endif /* fstatvfs */
3737 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3738 defined(PERL_MOUNT_NOSUID) && \
3739 defined(PERL_MOUNT_NOEXEC) && \
3740 defined(HAS_FSTATFS) && \
3741 defined(HAS_STRUCT_STATFS) && \
3742 defined(HAS_STRUCT_STATFS_F_FLAGS)
3743 # define FD_ON_NOSUID_CHECK_OKAY
3746 check_okay = fstatfs(fd, &stfs) == 0;
3747 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3748 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3749 # endif /* fstatfs */
3751 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3752 defined(PERL_MOUNT_NOSUID) && \
3753 defined(PERL_MOUNT_NOEXEC) && \
3754 defined(HAS_FSTAT) && \
3755 defined(HAS_USTAT) && \
3756 defined(HAS_GETMNT) && \
3757 defined(HAS_STRUCT_FS_DATA) && \
3759 # define FD_ON_NOSUID_CHECK_OKAY
3762 if (fstat(fd, &fdst) == 0) {
3764 if (ustat(fdst.st_dev, &us) == 0) {
3766 /* NOSTAT_ONE here because we're not examining fields which
3767 * vary between that case and STAT_ONE. */
3768 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3769 size_t cmplen = sizeof(us.f_fname);
3770 if (sizeof(fsd.fd_req.path) < cmplen)
3771 cmplen = sizeof(fsd.fd_req.path);
3772 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3773 fdst.st_dev == fsd.fd_req.dev) {
3775 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3776 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3781 # endif /* fstat+ustat+getmnt */
3783 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3784 defined(HAS_GETMNTENT) && \
3785 defined(HAS_HASMNTOPT) && \
3786 defined(MNTOPT_NOSUID) && \
3787 defined(MNTOPT_NOEXEC)
3788 # define FD_ON_NOSUID_CHECK_OKAY
3789 FILE *mtab = fopen("/etc/mtab", "r");
3790 struct mntent *entry;
3793 if (mtab && (fstat(fd, &stb) == 0)) {
3794 while (entry = getmntent(mtab)) {
3795 if (stat(entry->mnt_dir, &fsb) == 0
3796 && fsb.st_dev == stb.st_dev)
3798 /* found the filesystem */
3800 if (hasmntopt(entry, MNTOPT_NOSUID))
3802 if (hasmntopt(entry, MNTOPT_NOEXEC))
3805 } /* A single fs may well fail its stat(). */
3810 # endif /* getmntent+hasmntopt */
3813 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3815 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3817 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3818 return ((!check_okay) || on_nosuid || on_noexec);
3820 #endif /* IAMSUID */
3823 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3824 int fdscript, int suidscript)
3829 #endif /* IAMSUID */
3831 /* do we need to emulate setuid on scripts? */
3833 /* This code is for those BSD systems that have setuid #! scripts disabled
3834 * in the kernel because of a security problem. Merely defining DOSUID
3835 * in perl will not fix that problem, but if you have disabled setuid
3836 * scripts in the kernel, this will attempt to emulate setuid and setgid
3837 * on scripts that have those now-otherwise-useless bits set. The setuid
3838 * root version must be called suidperl or sperlN.NNN. If regular perl
3839 * discovers that it has opened a setuid script, it calls suidperl with
3840 * the same argv that it had. If suidperl finds that the script it has
3841 * just opened is NOT setuid root, it sets the effective uid back to the
3842 * uid. We don't just make perl setuid root because that loses the
3843 * effective uid we had before invoking perl, if it was different from the
3846 * Description/comments above do not match current workings:
3847 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3848 * suidperl called with script open and name changed to /dev/fd/N/X;
3849 * suidperl croaks if script is not setuid;
3850 * making perl setuid would be a huge security risk (and yes, that
3851 * would lose any euid we might have had).
3853 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3854 * be defined in suidperl only. suidperl must be setuid root. The
3855 * Configure script will set this up for you if you want it.
3861 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3862 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3863 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3865 const char *linestr;
3869 if (fdscript < 0 || suidscript != 1)
3870 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3872 * Since the script is opened by perl, not suidperl, some of these
3873 * checks are superfluous. Leaving them in probably does not lower
3877 * Do checks even for systems with no HAS_SETREUID.
3878 * We used to swap, then re-swap UIDs with
3880 if (setreuid(PL_euid,PL_uid) < 0
3881 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3882 Perl_croak(aTHX_ "Can't swap uid and euid");
3885 if (setreuid(PL_uid,PL_euid) < 0
3886 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3887 Perl_croak(aTHX_ "Can't reswap uid and euid");
3891 /* On this access check to make sure the directories are readable,
3892 * there is actually a small window that the user could use to make
3893 * filename point to an accessible directory. So there is a faint
3894 * chance that someone could execute a setuid script down in a
3895 * non-accessible directory. I don't know what to do about that.
3896 * But I don't think it's too important. The manual lies when
3897 * it says access() is useful in setuid programs.
3899 * So, access() is pretty useless... but not harmful... do anyway.
3901 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3902 Perl_croak(aTHX_ "Can't access() script\n");
3905 /* If we can swap euid and uid, then we can determine access rights
3906 * with a simple stat of the file, and then compare device and
3907 * inode to make sure we did stat() on the same file we opened.
3908 * Then we just have to make sure he or she can execute it.
3911 * As the script is opened by perl, not suidperl, we do not need to
3912 * care much about access rights.
3914 * The 'script changed' check is needed, or we can get lied to
3915 * about $0 with e.g.
3916 * suidperl /dev/fd/4//bin/x 4<setuidscript
3917 * Without HAS_SETREUID, is it safe to stat() as root?
3919 * Are there any operating systems that pass /dev/fd/xxx for setuid
3920 * scripts, as suggested/described in perlsec(1)? Surely they do not
3921 * pass the script name as we do, so the "script changed" test would
3922 * fail for them... but we never get here with
3923 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3925 * This is one place where we must "lie" about return status: not
3926 * say if the stat() failed. We are doing this as root, and could
3927 * be tricked into reporting existence or not of files that the
3928 * "plain" user cannot even see.
3932 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3933 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3934 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3935 Perl_croak(aTHX_ "Setuid script changed\n");
3939 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3940 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3943 * We used to do this check as the "plain" user (after swapping
3944 * UIDs). But the check for nosuid and noexec filesystem is needed,
3945 * and should be done even without HAS_SETREUID. (Maybe those
3946 * operating systems do not have such mount options anyway...)
3947 * Seems safe enough to do as root.
3949 #if !defined(NO_NOSUID_CHECK)
3950 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3951 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3954 #endif /* IAMSUID */
3956 if (!S_ISREG(PL_statbuf.st_mode)) {
3957 Perl_croak(aTHX_ "Setuid script not plain file\n");
3959 if (PL_statbuf.st_mode & S_IWOTH)
3960 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3961 PL_doswitches = FALSE; /* -s is insecure in suid */
3962 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3963 CopLINE_inc(PL_curcop);
3964 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3965 Perl_croak(aTHX_ "No #! line");
3966 linestr = SvPV_nolen_const(PL_linestr);
3967 /* required even on Sys V */
3968 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3969 Perl_croak(aTHX_ "No #! line");
3973 /* Sanity check on line length */
3974 s_end = s + strlen(s);
3975 if (s_end == s || (s_end - s) > 4000)
3976 Perl_croak(aTHX_ "Very long #! line");
3977 /* Allow more than a single space after #! */
3978 while (isSPACE(*s)) s++;
3979 /* Sanity check on buffer end */
3980 while ((*s) && !isSPACE(*s)) s++;
3981 for (s2 = s; (s2 > linestr &&
3982 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3983 || s2[-1] == '-')); s2--) ;
3984 /* Sanity check on buffer start */
3985 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3986 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3987 Perl_croak(aTHX_ "Not a perl script");
3988 while (*s == ' ' || *s == '\t') s++;
3990 * #! arg must be what we saw above. They can invoke it by
3991 * mentioning suidperl explicitly, but they may not add any strange
3992 * arguments beyond what #! says if they do invoke suidperl that way.
3995 * The way validarg was set up, we rely on the kernel to start
3996 * scripts with argv[1] set to contain all #! line switches (the
4000 * Check that we got all the arguments listed in the #! line (not
4001 * just that there are no extraneous arguments). Might not matter
4002 * much, as switches from #! line seem to be acted upon (also), and
4003 * so may be checked and trapped in perl. But, security checks must
4004 * be done in suidperl and not deferred to perl. Note that suidperl
4005 * does not get around to parsing (and checking) the switches on
4006 * the #! line (but execs perl sooner).
4007 * Allow (require) a trailing newline (which may be of two
4008 * characters on some architectures?) (but no other trailing
4011 len = strlen(validarg);
4012 if (strEQ(validarg," PHOOEY ") ||
4013 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4014 !((s_end - s) == len+1
4015 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4016 Perl_croak(aTHX_ "Args must match #! line");
4020 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4021 PL_euid == PL_statbuf.st_uid)
4023 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4024 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4025 #endif /* IAMSUID */
4028 PL_euid) { /* oops, we're not the setuid root perl */
4030 * When root runs a setuid script, we do not go through the same
4031 * steps of execing sperl and then perl with fd scripts, but
4032 * simply set up UIDs within the same perl invocation; so do
4033 * not have the same checks (on options, whatever) that we have
4034 * for plain users. No problem really: would have to be a script
4035 * that does not actually work for plain users; and if root is
4036 * foolish and can be persuaded to run such an unsafe script, he
4037 * might run also non-setuid ones, and deserves what he gets.
4039 * Or, we might drop the PL_euid check above (and rely just on
4040 * fdscript to avoid loops), and do the execs
4046 * Pass fd script to suidperl.
4047 * Exec suidperl, substituting fd script for scriptname.
4048 * Pass script name as "subdir" of fd, which perl will grok;
4049 * in fact will use that to distinguish this from "normal"
4050 * usage, see comments above.
4052 PerlIO_rewind(PL_rsfp);
4053 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4054 /* PSz 27 Feb 04 Sanity checks on scriptname */
4055 if ((!scriptname) || (!*scriptname) ) {
4056 Perl_croak(aTHX_ "No setuid script name\n");
4058 if (*scriptname == '-') {
4059 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4060 /* Or we might confuse it with an option when replacing
4061 * name in argument list, below (though we do pointer, not
4062 * string, comparisons).
4065 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4066 if (!PL_origargv[which]) {
4067 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4069 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4070 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4071 #if defined(HAS_FCNTL) && defined(F_SETFD)
4072 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4075 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4076 (int)PERL_REVISION, (int)PERL_VERSION,
4077 (int)PERL_SUBVERSION), PL_origargv);
4079 #endif /* IAMSUID */
4080 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4083 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4085 * This seems back to front: we try HAS_SETEGID first; if not available
4086 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4087 * in the sense that we only want to set EGID; but are there any machines
4088 * with either of the latter, but not the former? Same with UID, later.
4091 (void)setegid(PL_statbuf.st_gid);
4094 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4096 #ifdef HAS_SETRESGID
4097 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4099 PerlProc_setgid(PL_statbuf.st_gid);
4103 if (PerlProc_getegid() != PL_statbuf.st_gid)
4104 Perl_croak(aTHX_ "Can't do setegid!\n");
4106 if (PL_statbuf.st_mode & S_ISUID) {
4107 if (PL_statbuf.st_uid != PL_euid)
4109 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4112 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4114 #ifdef HAS_SETRESUID
4115 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4117 PerlProc_setuid(PL_statbuf.st_uid);
4121 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4122 Perl_croak(aTHX_ "Can't do seteuid!\n");
4124 else if (PL_uid) { /* oops, mustn't run as root */
4126 (void)seteuid((Uid_t)PL_uid);
4129 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4131 #ifdef HAS_SETRESUID
4132 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4134 PerlProc_setuid((Uid_t)PL_uid);
4138 if (PerlProc_geteuid() != PL_uid)
4139 Perl_croak(aTHX_ "Can't do seteuid!\n");
4142 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4143 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4146 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4147 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4148 else if (fdscript < 0 || suidscript != 1)
4149 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4150 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4152 /* PSz 16 Sep 03 Keep neat error message */
4153 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4156 /* We absolutely must clear out any saved ids here, so we */
4157 /* exec the real perl, substituting fd script for scriptname. */
4158 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4160 * It might be thought that using setresgid and/or setresuid (changed to
4161 * set the saved IDs) above might obviate the need to exec, and we could
4162 * go on to "do the perl thing".
4164 * Is there such a thing as "saved GID", and is that set for setuid (but
4165 * not setgid) execution like suidperl? Without exec, it would not be
4166 * cleared for setuid (but not setgid) scripts (or might need a dummy
4169 * We need suidperl to do the exact same argument checking that perl
4170 * does. Thus it cannot be very small; while it could be significantly
4171 * smaller, it is safer (simpler?) to make it essentially the same
4172 * binary as perl (but they are not identical). - Maybe could defer that
4173 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4174 * but prefer to do thorough checks in suidperl itself. Such deferral
4175 * would make suidperl security rely on perl, a design no-no.
4177 * Setuid things should be short and simple, thus easy to understand and
4178 * verify. They should do their "own thing", without influence by
4179 * attackers. It may help if their internal execution flow is fixed,
4180 * regardless of platform: it may be best to exec anyway.
4182 * Suidperl should at least be conceptually simple: a wrapper only,
4183 * never to do any real perl. Maybe we should put
4185 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4187 * into the perly bits.
4189 PerlIO_rewind(PL_rsfp);
4190 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4192 * Keep original arguments: suidperl already has fd script.
4194 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4195 /* if (!PL_origargv[which]) { */
4196 /* errno = EPERM; */
4197 /* Perl_croak(aTHX_ "Permission denied\n"); */
4199 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4200 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4201 #if defined(HAS_FCNTL) && defined(F_SETFD)
4202 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4205 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4206 (int)PERL_REVISION, (int)PERL_VERSION,
4207 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4209 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4210 #endif /* IAMSUID */
4212 PERL_UNUSED_ARG(fdscript);
4213 PERL_UNUSED_ARG(suidscript);
4214 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4215 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4216 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4217 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4219 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4222 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4223 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4224 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4225 /* not set-id, must be wrapped */
4228 PERL_UNUSED_ARG(validarg);
4229 PERL_UNUSED_ARG(scriptname);
4233 S_find_beginning(pTHX)
4237 register const char *s2;
4238 #ifdef MACOS_TRADITIONAL
4242 /* skip forward in input to the real script? */
4244 #ifdef MACOS_TRADITIONAL
4245 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4247 while (PL_doextract || gMacPerl_AlwaysExtract) {
4248 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4249 if (!gMacPerl_AlwaysExtract)
4250 Perl_croak(aTHX_ "No Perl script found in input\n");
4252 if (PL_doextract) /* require explicit override ? */
4253 if (!OverrideExtract(PL_origfilename))
4254 Perl_croak(aTHX_ "User aborted script\n");
4256 PL_doextract = FALSE;
4258 /* Pater peccavi, file does not have #! */
4259 PerlIO_rewind(PL_rsfp);
4264 while (PL_doextract) {
4265 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4266 Perl_croak(aTHX_ "No Perl script found in input\n");
4269 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4270 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4271 PL_doextract = FALSE;
4272 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4274 while (*s == ' ' || *s == '\t') s++;
4276 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4277 || s2[-1] == '_') s2--;
4278 if (strnEQ(s2-4,"perl",4))
4279 while ((s = moreswitches(s)))
4282 #ifdef MACOS_TRADITIONAL
4283 /* We are always searching for the #!perl line in MacPerl,
4284 * so if we find it, still keep the line count correct
4285 * by counting lines we already skipped over
4287 for (; maclines > 0 ; maclines--)
4288 PerlIO_ungetc(PL_rsfp, '\n');
4292 /* gMacPerl_AlwaysExtract is false in MPW tool */
4293 } else if (gMacPerl_AlwaysExtract) {
4305 PL_uid = PerlProc_getuid();
4306 PL_euid = PerlProc_geteuid();
4307 PL_gid = PerlProc_getgid();
4308 PL_egid = PerlProc_getegid();
4310 PL_uid |= PL_gid << 16;
4311 PL_euid |= PL_egid << 16;
4313 /* Should not happen: */
4314 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4315 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4318 * Should go by suidscript, not uid!=euid: why disallow
4319 * system("ls") in scripts run from setuid things?
4320 * Or, is this run before we check arguments and set suidscript?
4321 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4322 * (We never have suidscript, can we be sure to have fdscript?)
4323 * Or must then go by UID checks? See comments in forbid_setid also.
4327 /* This is used very early in the lifetime of the program,
4328 * before even the options are parsed, so PL_tainting has
4329 * not been initialized properly. */
4331 Perl_doing_taint(int argc, char *argv[], char *envp[])
4333 #ifndef PERL_IMPLICIT_SYS
4334 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4335 * before we have an interpreter-- and the whole point of this
4336 * function is to be called at such an early stage. If you are on
4337 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4338 * "tainted because running with altered effective ids', you'll
4339 * have to add your own checks somewhere in here. The two most
4340 * known samples of 'implicitness' are Win32 and NetWare, neither
4341 * of which has much of concept of 'uids'. */
4342 int uid = PerlProc_getuid();
4343 int euid = PerlProc_geteuid();
4344 int gid = PerlProc_getgid();
4345 int egid = PerlProc_getegid();
4352 if (uid && (euid != uid || egid != gid))
4354 #endif /* !PERL_IMPLICIT_SYS */
4355 /* This is a really primitive check; environment gets ignored only
4356 * if -T are the first chars together; otherwise one gets
4357 * "Too late" message. */
4358 if ( argc > 1 && argv[1][0] == '-'
4359 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4364 /* Passing the flag as a single char rather than a string is a slight space
4365 optimisation. The only message that isn't /^-.$/ is
4366 "program input from stdin", which is substituted in place of '\0', which
4367 could never be a command line flag. */
4369 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4372 char string[3] = "-x";
4373 const char *message = "program input from stdin";
4380 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4381 if (PL_euid != PL_uid)
4382 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4383 if (PL_egid != PL_gid)
4384 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4385 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4387 * Checks for UID/GID above "wrong": why disallow
4388 * perl -e 'print "Hello\n"'
4389 * from within setuid things?? Simply drop them: replaced by
4390 * fdscript/suidscript and #ifdef IAMSUID checks below.
4392 * This may be too late for command-line switches. Will catch those on
4393 * the #! line, after finding the script name and setting up
4394 * fdscript/suidscript. Note that suidperl does not get around to
4395 * parsing (and checking) the switches on the #! line, but checks that
4396 * the two sets are identical.
4398 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4399 * instead, or would that be "too late"? (We never have suidscript, can
4400 * we be sure to have fdscript?)
4402 * Catch things with suidscript (in descendant of suidperl), even with
4403 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4404 * below; but I am paranoid.
4406 * Also see comments about root running a setuid script, elsewhere.
4408 if (suidscript >= 0)
4409 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4411 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4412 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4413 #endif /* IAMSUID */
4417 Perl_init_debugger(pTHX)
4420 HV * const ostash = PL_curstash;
4422 PL_curstash = PL_debstash;
4423 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4425 AvREAL_off(PL_dbargs);
4426 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4427 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4428 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4429 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4430 sv_setiv(PL_DBsingle, 0);
4431 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4432 sv_setiv(PL_DBtrace, 0);
4433 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4434 sv_setiv(PL_DBsignal, 0);
4435 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4436 sv_setiv(PL_DBassertion, 0);
4437 PL_curstash = ostash;
4440 #ifndef STRESS_REALLOC
4441 #define REASONABLE(size) (size)
4443 #define REASONABLE(size) (1) /* unreasonable */
4447 Perl_init_stacks(pTHX)
4450 /* start with 128-item stack and 8K cxstack */
4451 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4452 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4453 PL_curstackinfo->si_type = PERLSI_MAIN;
4454 PL_curstack = PL_curstackinfo->si_stack;
4455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4457 PL_stack_base = AvARRAY(PL_curstack);
4458 PL_stack_sp = PL_stack_base;
4459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4461 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4464 PL_tmps_max = REASONABLE(128);
4466 Newx(PL_markstack,REASONABLE(32),I32);
4467 PL_markstack_ptr = PL_markstack;
4468 PL_markstack_max = PL_markstack + REASONABLE(32);
4472 Newx(PL_scopestack,REASONABLE(32),I32);
4473 PL_scopestack_ix = 0;
4474 PL_scopestack_max = REASONABLE(32);
4476 Newx(PL_savestack,REASONABLE(128),ANY);
4477 PL_savestack_ix = 0;
4478 PL_savestack_max = REASONABLE(128);
4487 while (PL_curstackinfo->si_next)
4488 PL_curstackinfo = PL_curstackinfo->si_next;
4489 while (PL_curstackinfo) {
4490 PERL_SI *p = PL_curstackinfo->si_prev;
4491 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4492 Safefree(PL_curstackinfo->si_cxstack);
4493 Safefree(PL_curstackinfo);
4494 PL_curstackinfo = p;
4496 Safefree(PL_tmps_stack);
4497 Safefree(PL_markstack);
4498 Safefree(PL_scopestack);
4499 Safefree(PL_savestack);
4509 lex_start(PL_linestr);
4511 PL_subname = newSVpvs("main");
4515 S_init_predump_symbols(pTHX)
4521 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4522 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4523 GvMULTI_on(PL_stdingv);
4524 io = GvIOp(PL_stdingv);
4525 IoTYPE(io) = IoTYPE_RDONLY;
4526 IoIFP(io) = PerlIO_stdin();
4527 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4529 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4531 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4534 IoTYPE(io) = IoTYPE_WRONLY;
4535 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4537 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4539 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4541 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4542 GvMULTI_on(PL_stderrgv);
4543 io = GvIOp(PL_stderrgv);
4544 IoTYPE(io) = IoTYPE_WRONLY;
4545 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4546 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4548 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4550 PL_statname = newSV(0); /* last filename we did stat on */
4552 Safefree(PL_osname);
4553 PL_osname = savepv(OSNAME);
4557 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4560 argc--,argv++; /* skip name of script */
4561 if (PL_doswitches) {
4562 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4566 if (argv[0][1] == '-' && !argv[0][2]) {
4570 if ((s = strchr(argv[0], '='))) {
4571 const char *const start_name = argv[0] + 1;
4572 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4573 TRUE, SVt_PV)), s + 1);
4576 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4579 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4580 GvMULTI_on(PL_argvgv);
4581 (void)gv_AVadd(PL_argvgv);
4582 av_clear(GvAVn(PL_argvgv));
4583 for (; argc > 0; argc--,argv++) {
4584 SV * const sv = newSVpv(argv[0],0);
4585 av_push(GvAVn(PL_argvgv),sv);
4586 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4587 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4590 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4591 (void)sv_utf8_decode(sv);
4597 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4602 PL_toptarget = newSV(0);
4603 sv_upgrade(PL_toptarget, SVt_PVFM);
4604 sv_setpvn(PL_toptarget, "", 0);
4605 PL_bodytarget = newSV(0);
4606 sv_upgrade(PL_bodytarget, SVt_PVFM);
4607 sv_setpvn(PL_bodytarget, "", 0);
4608 PL_formtarget = PL_bodytarget;
4612 init_argv_symbols(argc,argv);
4614 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4615 #ifdef MACOS_TRADITIONAL
4616 /* $0 is not majick on a Mac */
4617 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4619 sv_setpv(GvSV(tmpgv),PL_origfilename);
4620 magicname("0", "0", 1);
4623 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4625 GvMULTI_on(PL_envgv);
4626 hv = GvHVn(PL_envgv);
4627 hv_magic(hv, NULL, PERL_MAGIC_env);
4629 #ifdef USE_ENVIRON_ARRAY
4630 /* Note that if the supplied env parameter is actually a copy
4631 of the global environ then it may now point to free'd memory
4632 if the environment has been modified since. To avoid this
4633 problem we treat env==NULL as meaning 'use the default'
4638 # ifdef USE_ITHREADS
4639 && PL_curinterp == aTHX
4646 char** origenv = environ;
4649 for (; *env; env++) {
4650 if (!(s = strchr(*env,'=')) || s == *env)
4652 #if defined(MSDOS) && !defined(DJGPP)
4657 sv = newSVpv(s+1, 0);
4658 (void)hv_store(hv, *env, s - *env, sv, 0);
4661 if (origenv != environ) {
4662 /* realloc has shifted us */
4663 env = (env - origenv) + environ;
4668 #endif /* USE_ENVIRON_ARRAY */
4669 #endif /* !PERL_MICRO */
4672 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4673 SvREADONLY_off(GvSV(tmpgv));
4674 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4675 SvREADONLY_on(GvSV(tmpgv));
4677 #ifdef THREADS_HAVE_PIDS
4678 PL_ppid = (IV)getppid();
4681 /* touch @F array to prevent spurious warnings 20020415 MJD */
4683 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4685 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4686 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4687 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4691 S_init_perllib(pTHX)
4697 s = PerlEnv_getenv("PERL5LIB");
4699 * It isn't possible to delete an environment variable with
4700 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4701 * case we treat PERL5LIB as undefined if it has a zero-length value.
4703 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4704 if (s && *s != '\0')
4708 incpush(s, TRUE, TRUE, TRUE, FALSE);
4710 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4712 /* Treat PERL5?LIB as a possible search list logical name -- the
4713 * "natural" VMS idiom for a Unix path string. We allow each
4714 * element to be a set of |-separated directories for compatibility.
4718 if (my_trnlnm("PERL5LIB",buf,0))
4719 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4721 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4725 /* Use the ~-expanded versions of APPLLIB (undocumented),
4726 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4729 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4733 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4735 #ifdef MACOS_TRADITIONAL
4738 SV * privdir = newSV(0);
4739 char * macperl = PerlEnv_getenv("MACPERL");
4744 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4745 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4746 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4747 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4748 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4749 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4751 SvREFCNT_dec(privdir);
4754 incpush(":", FALSE, FALSE, TRUE, FALSE);
4757 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4760 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4762 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4766 /* sitearch is always relative to sitelib on Windows for
4767 * DLL-based path intuition to work correctly */
4768 # if !defined(WIN32)
4769 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4775 /* this picks up sitearch as well */
4776 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4778 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4782 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4783 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4786 #ifdef PERL_VENDORARCH_EXP
4787 /* vendorarch is always relative to vendorlib on Windows for
4788 * DLL-based path intuition to work correctly */
4789 # if !defined(WIN32)
4790 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4794 #ifdef PERL_VENDORLIB_EXP
4796 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4798 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4802 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4803 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4806 #ifdef PERL_OTHERLIBDIRS
4807 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4811 incpush(".", FALSE, FALSE, TRUE, FALSE);
4812 #endif /* MACOS_TRADITIONAL */
4815 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4816 # define PERLLIB_SEP ';'
4819 # define PERLLIB_SEP '|'
4821 # if defined(MACOS_TRADITIONAL)
4822 # define PERLLIB_SEP ','
4824 # define PERLLIB_SEP ':'
4828 #ifndef PERLLIB_MANGLE
4829 # define PERLLIB_MANGLE(s,n) (s)
4832 /* Push a directory onto @INC if it exists.
4833 Generate a new SV if we do this, to save needing to copy the SV we push
4836 S_incpush_if_exists(pTHX_ SV *dir)
4840 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4841 S_ISDIR(tmpstatbuf.st_mode)) {
4842 av_push(GvAVn(PL_incgv), dir);
4849 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4854 const char *p = dir;
4859 if (addsubdirs || addoldvers) {
4863 /* Break at all separators */
4865 SV *libdir = newSV(0);
4868 /* skip any consecutive separators */
4870 while ( *p == PERLLIB_SEP ) {
4871 /* Uncomment the next line for PATH semantics */
4872 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4877 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4878 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4883 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4884 p = NULL; /* break out */
4886 #ifdef MACOS_TRADITIONAL
4887 if (!strchr(SvPVX(libdir), ':')) {
4890 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4892 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4893 sv_catpvs(libdir, ":");
4896 /* Do the if() outside the #ifdef to avoid warnings about an unused
4899 #ifdef PERL_RELOCATABLE_INC
4901 * Relocatable include entries are marked with a leading .../
4904 * 0: Remove that leading ".../"
4905 * 1: Remove trailing executable name (anything after the last '/')
4906 * from the perl path to give a perl prefix
4908 * While the @INC element starts "../" and the prefix ends with a real
4909 * directory (ie not . or ..) chop that real directory off the prefix
4910 * and the leading "../" from the @INC element. ie a logical "../"
4912 * Finally concatenate the prefix and the remainder of the @INC element
4913 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4914 * generates /usr/local/lib/perl5
4916 const char *libpath = SvPVX(libdir);
4917 STRLEN libpath_len = SvCUR(libdir);
4918 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4920 SV * const caret_X = get_sv("\030", 0);
4921 /* Going to use the SV just as a scratch buffer holding a C
4927 /* $^X is *the* source of taint if tainting is on, hence
4928 SvPOK() won't be true. */
4930 assert(SvPOKp(caret_X));
4931 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4932 /* Firstly take off the leading .../
4933 If all else fail we'll do the paths relative to the current
4935 sv_chop(libdir, libpath + 4);
4936 /* Don't use SvPV as we're intentionally bypassing taining,
4937 mortal copies that the mg_get of tainting creates, and
4938 corruption that seems to come via the save stack.
4939 I guess that the save stack isn't correctly set up yet. */
4940 libpath = SvPVX(libdir);
4941 libpath_len = SvCUR(libdir);
4943 /* This would work more efficiently with memrchr, but as it's
4944 only a GNU extension we'd need to probe for it and
4945 implement our own. Not hard, but maybe not worth it? */
4947 prefix = SvPVX(prefix_sv);
4948 lastslash = strrchr(prefix, '/');
4950 /* First time in with the *lastslash = '\0' we just wipe off
4951 the trailing /perl from (say) /usr/foo/bin/perl
4955 while ((*lastslash = '\0'), /* Do that, come what may. */
4956 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4957 && (lastslash = strrchr(prefix, '/')))) {
4958 if (lastslash[1] == '\0'
4959 || (lastslash[1] == '.'
4960 && (lastslash[2] == '/' /* ends "/." */
4961 || (lastslash[2] == '/'
4962 && lastslash[3] == '/' /* or "/.." */
4964 /* Prefix ends "/" or "/." or "/..", any of which
4965 are fishy, so don't do any more logical cleanup.
4969 /* Remove leading "../" from path */
4972 /* Next iteration round the loop removes the last
4973 directory name from prefix by writing a '\0' in
4974 the while clause. */
4976 /* prefix has been terminated with a '\0' to the correct
4977 length. libpath points somewhere into the libdir SV.
4978 We need to join the 2 with '/' and drop the result into
4980 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4981 SvREFCNT_dec(libdir);
4982 /* And this is the new libdir. */
4985 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4986 /* Need to taint reloccated paths if running set ID */
4987 SvTAINTED_on(libdir);
4990 SvREFCNT_dec(prefix_sv);
4995 * BEFORE pushing libdir onto @INC we may first push version- and
4996 * archname-specific sub-directories.
4998 if (addsubdirs || addoldvers) {
4999 #ifdef PERL_INC_VERSION_LIST
5000 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5001 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5002 const char * const *incver;
5008 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5010 while (unix[len-1] == '/') len--; /* Cosmetic */
5011 sv_usepvn(libdir,unix,len);
5014 PerlIO_printf(Perl_error_log,
5015 "Failed to unixify @INC element \"%s\"\n",
5019 #ifdef MACOS_TRADITIONAL
5020 #define PERL_AV_SUFFIX_FMT ""
5021 #define PERL_ARCH_FMT "%s:"
5022 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5024 #define PERL_AV_SUFFIX_FMT "/"
5025 #define PERL_ARCH_FMT "/%s"
5026 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5028 /* .../version/archname if -d .../version/archname */
5029 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5031 (int)PERL_REVISION, (int)PERL_VERSION,
5032 (int)PERL_SUBVERSION, ARCHNAME);
5033 subdir = S_incpush_if_exists(aTHX_ subdir);
5035 /* .../version if -d .../version */
5036 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5037 (int)PERL_REVISION, (int)PERL_VERSION,
5038 (int)PERL_SUBVERSION);
5039 subdir = S_incpush_if_exists(aTHX_ subdir);
5041 /* .../archname if -d .../archname */
5042 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5043 subdir = S_incpush_if_exists(aTHX_ subdir);
5047 #ifdef PERL_INC_VERSION_LIST
5049 for (incver = incverlist; *incver; incver++) {
5050 /* .../xxx if -d .../xxx */
5051 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5052 subdir = S_incpush_if_exists(aTHX_ subdir);
5058 /* finally push this lib directory on the end of @INC */
5059 av_push(GvAVn(PL_incgv), libdir);
5062 assert (SvREFCNT(subdir) == 1);
5063 SvREFCNT_dec(subdir);
5069 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5073 const line_t oldline = CopLINE(PL_curcop);
5079 while (av_len(paramList) >= 0) {
5080 cv = (CV*)av_shift(paramList);
5082 if (paramList == PL_beginav) {
5083 /* save PL_beginav for compiler */
5084 if (! PL_beginav_save)
5085 PL_beginav_save = newAV();
5086 av_push(PL_beginav_save, (SV*)cv);
5088 else if (paramList == PL_checkav) {
5089 /* save PL_checkav for compiler */
5090 if (! PL_checkav_save)
5091 PL_checkav_save = newAV();
5092 av_push(PL_checkav_save, (SV*)cv);
5102 (void)SvPV_const(atsv, len);
5104 PL_curcop = &PL_compiling;
5105 CopLINE_set(PL_curcop, oldline);
5106 if (paramList == PL_beginav)
5107 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5109 Perl_sv_catpvf(aTHX_ atsv,
5110 "%s failed--call queue aborted",
5111 paramList == PL_checkav ? "CHECK"
5112 : paramList == PL_initav ? "INIT"
5114 while (PL_scopestack_ix > oldscope)
5117 Perl_croak(aTHX_ "%"SVf"", atsv);
5124 /* my_exit() was called */
5125 while (PL_scopestack_ix > oldscope)
5128 PL_curstash = PL_defstash;
5129 PL_curcop = &PL_compiling;
5130 CopLINE_set(PL_curcop, oldline);
5132 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5133 if (paramList == PL_beginav)
5134 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5136 Perl_croak(aTHX_ "%s failed--call queue aborted",
5137 paramList == PL_checkav ? "CHECK"
5138 : paramList == PL_initav ? "INIT"
5145 PL_curcop = &PL_compiling;
5146 CopLINE_set(PL_curcop, oldline);
5149 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5158 S_call_list_body(pTHX_ CV *cv)
5161 PUSHMARK(PL_stack_sp);
5162 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5167 Perl_my_exit(pTHX_ U32 status)
5170 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5171 thr, (unsigned long) status));
5180 STATUS_EXIT_SET(status);
5187 Perl_my_failure_exit(pTHX)
5191 /* We have been called to fall on our sword. The desired exit code
5192 * should be already set in STATUS_UNIX, but could be shifted over
5193 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5196 * If an error code has not been set, then force the issue.
5198 if (MY_POSIX_EXIT) {
5200 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5201 * the exit code when there isn't an error.
5204 if (STATUS_UNIX == 0)
5205 STATUS_UNIX_EXIT_SET(255);
5207 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5209 /* The exit code could have been set by $? or vmsish which
5210 * means that it may not be fatal. So convert
5211 * success/warning codes to fatal.
5213 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5214 STATUS_UNIX_EXIT_SET(255);
5218 /* Traditionally Perl on VMS always expects a Fatal Error. */
5219 if (vaxc$errno & 1) {
5221 /* So force success status to failure */
5222 if (STATUS_NATIVE & 1)
5227 STATUS_UNIX = EINTR; /* In case something cares */
5232 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5234 /* Encode the severity code */
5235 severity = STATUS_NATIVE & STS$M_SEVERITY;
5236 STATUS_UNIX = (severity ? severity : 1) << 8;
5238 /* Perl expects this to be a fatal error */
5239 if (severity != STS$K_SEVERE)
5248 STATUS_UNIX_SET(errno);
5250 exitstatus = STATUS_UNIX >> 8;
5251 if (exitstatus & 255)
5252 STATUS_UNIX_SET(exitstatus);
5254 STATUS_UNIX_SET(255);
5261 S_my_exit_jump(pTHX)
5266 SvREFCNT_dec(PL_e_script);
5270 POPSTACK_TO(PL_mainstack);
5278 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5281 const char * const p = SvPVX_const(PL_e_script);
5282 const char *nl = strchr(p, '\n');
5284 PERL_UNUSED_ARG(idx);
5285 PERL_UNUSED_ARG(maxlen);
5287 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5289 filter_del(read_e_script);
5292 sv_catpvn(buf_sv, p, nl-p);
5293 sv_chop(PL_e_script, nl);
5299 * c-indentation-style: bsd
5301 * indent-tabs-mode: t
5304 * ex: set ts=8 sts=4 sw=4 noet: