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"
1803 # ifdef PERL_MALLOC_WRAP
1806 # ifdef PERL_NEED_APPCTX
1809 # ifdef PERL_NEED_TIMESBASE
1810 " PERL_NEED_TIMESBASE"
1812 # ifdef PERL_OLD_COPY_ON_WRITE
1813 " PERL_OLD_COPY_ON_WRITE"
1815 # ifdef PERL_TRACK_MEMPOOL
1816 " PERL_TRACK_MEMPOOL"
1818 # ifdef PERL_USE_SAFE_PUTENV
1819 " PERL_USE_SAFE_PUTENV"
1821 #ifdef PERL_USES_PL_PIDSTATUS
1822 " PERL_USES_PL_PIDSTATUS"
1824 # ifdef PL_OP_SLAB_ALLOC
1827 # ifdef THREADS_HAVE_PIDS
1828 " THREADS_HAVE_PIDS"
1830 # ifdef USE_64_BIT_ALL
1833 # ifdef USE_64_BIT_INT
1836 # ifdef USE_ITHREADS
1839 # ifdef USE_LARGE_FILES
1842 # ifdef USE_LONG_DOUBLE
1848 # ifdef USE_REENTRANT_API
1849 " USE_REENTRANT_API"
1854 # ifdef USE_SITECUSTOMIZE
1855 " USE_SITECUSTOMIZE"
1862 while (SvCUR(opts_prog) > opts+76) {
1863 /* find last space after "options: " and before col 76
1867 char * const pv = SvPV_nolen(opts_prog);
1868 const char c = pv[opts+76];
1870 space = strrchr(pv+opts+26, ' ');
1872 if (!space) break; /* "Can't happen" */
1874 /* break the line before that space */
1877 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1878 STR_WITH_LEN("\\n "));
1881 sv_catpvs(opts_prog,"\\n\",");
1883 #if defined(LOCAL_PATCH_COUNT)
1884 if (LOCAL_PATCH_COUNT > 0) {
1886 sv_catpvs(opts_prog,
1887 "\" Locally applied patches:\\n\",");
1888 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1889 if (PL_localpatches[i])
1890 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1891 0, PL_localpatches[i], 0);
1895 Perl_sv_catpvf(aTHX_ opts_prog,
1896 "\" Built under %s\\n\"",OSNAME);
1899 Perl_sv_catpvf(aTHX_ opts_prog,
1900 ",\" Compiled at %s %s\\n\"",__DATE__,
1903 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1907 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1908 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1909 "sort grep {/^PERL/} keys %ENV; ");
1911 sv_catpvs(opts_prog,
1912 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1914 sv_catpvs(opts_prog,
1915 "print \" \\%ENV:\\n @env\\n\" if @env;"
1916 "print \" \\@INC:\\n @INC\\n\";");
1920 opts_prog = Perl_newSVpvf(aTHX_
1921 "Config::config_vars(qw%c%s%c)",
1925 av_push(PL_preambleav, opts_prog);
1926 /* don't look for script or read stdin */
1927 scriptname = BIT_BUCKET;
1931 PL_doextract = TRUE;
1939 if (!*++s || isSPACE(*s)) {
1943 /* catch use of gnu style long options */
1944 if (strEQ(s, "version")) {
1948 if (strEQ(s, "help")) {
1955 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1961 #ifndef SECURE_INTERNAL_GETENV
1964 (s = PerlEnv_getenv("PERL5OPT")))
1966 const char *popt = s;
1969 if (*s == '-' && *(s+1) == 'T') {
1970 CHECK_MALLOC_TOO_LATE_FOR('T');
1972 PL_taint_warn = FALSE;
1975 char *popt_copy = NULL;
1988 if (!strchr("CDIMUdmtwA", *s))
1989 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1993 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1994 s = popt_copy + (s - popt);
1995 d = popt_copy + (d - popt);
2002 if( !PL_tainting ) {
2003 PL_taint_warn = TRUE;
2013 #ifdef USE_SITECUSTOMIZE
2016 PL_preambleav = newAV();
2017 av_unshift(PL_preambleav, 1);
2018 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2022 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2023 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2027 scriptname = argv[0];
2030 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2032 else if (scriptname == NULL) {
2034 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2040 /* Set $^X early so that it can be used for relocatable paths in @INC */
2041 assert (!PL_tainted);
2043 S_set_caret_X(aTHX);
2050 = open_script(scriptname, dosearch, sv, &suidscript);
2052 validate_suid(validarg, scriptname, fdscript, suidscript);
2055 # if defined(SIGCHLD) || defined(SIGCLD)
2058 # define SIGCHLD SIGCLD
2060 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2061 if (sigstate == (Sighandler_t) SIG_IGN) {
2062 if (ckWARN(WARN_SIGNAL))
2063 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2064 "Can't ignore signal CHLD, forcing to default");
2065 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2072 #ifdef MACOS_TRADITIONAL
2073 || gMacPerl_AlwaysExtract
2077 /* This will croak if suidscript is >= 0, as -x cannot be used with
2079 forbid_setid('x', suidscript);
2080 /* Hence you can't get here if suidscript >= 0 */
2083 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2084 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2088 PL_main_cv = PL_compcv = (CV*)newSV(0);
2089 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2090 CvUNIQUE_on(PL_compcv);
2092 CvPADLIST(PL_compcv) = pad_new(0);
2095 boot_core_UNIVERSAL();
2096 boot_core_xsutils();
2099 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2101 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2107 # ifdef HAS_SOCKS5_INIT
2108 socks5_init(argv[0]);
2114 init_predump_symbols();
2115 /* init_postdump_symbols not currently designed to be called */
2116 /* more than once (ENV isn't cleared first, for example) */
2117 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2119 init_postdump_symbols(argc,argv,env);
2121 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2122 * or explicitly in some platforms.
2123 * locale.c:Perl_init_i18nl10n() if the environment
2124 * look like the user wants to use UTF-8. */
2125 #if defined(__SYMBIAN32__)
2126 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2129 /* Requires init_predump_symbols(). */
2130 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2135 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2136 * and the default open disciplines. */
2137 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2138 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2140 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2141 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2142 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2144 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2145 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2146 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2148 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2149 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2150 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2152 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2153 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2156 sv_setpvn(sv, ":utf8\0:utf8", 11);
2158 sv_setpvn(sv, ":utf8\0", 6);
2161 sv_setpvn(sv, "\0:utf8", 6);
2167 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2168 if (strEQ(s, "unsafe"))
2169 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2170 else if (strEQ(s, "safe"))
2171 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2173 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2178 /* now parse the script */
2180 SETERRNO(0,SS_NORMAL);
2182 #ifdef MACOS_TRADITIONAL
2183 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2185 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2187 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2188 MacPerl_MPWFileName(PL_origfilename));
2192 if (yyparse() || PL_error_count) {
2194 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2196 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2201 CopLINE_set(PL_curcop, 0);
2202 PL_curstash = PL_defstash;
2203 PL_preprocess = FALSE;
2205 SvREFCNT_dec(PL_e_script);
2213 SAVECOPFILE(PL_curcop);
2214 SAVECOPLINE(PL_curcop);
2215 gv_check(PL_defstash);
2222 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2223 dump_mstats("after compilation:");
2232 =for apidoc perl_run
2234 Tells a Perl interpreter to run. See L<perlembed>.
2247 PERL_UNUSED_CONTEXT;
2249 oldscope = PL_scopestack_ix;
2257 cxstack_ix = -1; /* start context stack again */
2259 case 0: /* normal completion */
2263 case 2: /* my_exit() */
2264 while (PL_scopestack_ix > oldscope)
2267 PL_curstash = PL_defstash;
2268 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2269 PL_endav && !PL_minus_c)
2270 call_list(oldscope, PL_endav);
2272 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2273 dump_mstats("after execution: ");
2279 POPSTACK_TO(PL_mainstack);
2282 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2294 S_run_body(pTHX_ I32 oldscope)
2297 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2298 PL_sawampersand ? "Enabling" : "Omitting"));
2300 if (!PL_restartop) {
2301 DEBUG_x(dump_all());
2304 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2306 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2310 #ifdef MACOS_TRADITIONAL
2311 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2312 (gMacPerl_ErrorFormat ? "# " : ""),
2313 MacPerl_MPWFileName(PL_origfilename));
2315 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2319 if (PERLDB_SINGLE && PL_DBsingle)
2320 sv_setiv(PL_DBsingle, 1);
2322 call_list(oldscope, PL_initav);
2328 PL_op = PL_restartop;
2332 else if (PL_main_start) {
2333 CvDEPTH(PL_main_cv) = 1;
2334 PL_op = PL_main_start;
2342 =head1 SV Manipulation Functions
2344 =for apidoc p||get_sv
2346 Returns the SV of the specified Perl scalar. If C<create> is set and the
2347 Perl variable does not exist then it will be created. If C<create> is not
2348 set and the variable does not exist then NULL is returned.
2354 Perl_get_sv(pTHX_ const char *name, I32 create)
2357 gv = gv_fetchpv(name, create, SVt_PV);
2364 =head1 Array Manipulation Functions
2366 =for apidoc p||get_av
2368 Returns the AV of the specified Perl array. If C<create> is set and the
2369 Perl variable does not exist then it will be created. If C<create> is not
2370 set and the variable does not exist then NULL is returned.
2376 Perl_get_av(pTHX_ const char *name, I32 create)
2378 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2387 =head1 Hash Manipulation Functions
2389 =for apidoc p||get_hv
2391 Returns the HV of the specified Perl hash. If C<create> is set and the
2392 Perl variable does not exist then it will be created. If C<create> is not
2393 set and the variable does not exist then NULL is returned.
2399 Perl_get_hv(pTHX_ const char *name, I32 create)
2401 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2410 =head1 CV Manipulation Functions
2412 =for apidoc p||get_cv
2414 Returns the CV of the specified Perl subroutine. If C<create> is set and
2415 the Perl subroutine does not exist then it will be declared (which has the
2416 same effect as saying C<sub name;>). If C<create> is not set and the
2417 subroutine does not exist then NULL is returned.
2423 Perl_get_cv(pTHX_ const char *name, I32 create)
2425 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2426 /* XXX unsafe for threads if eval_owner isn't held */
2427 /* XXX this is probably not what they think they're getting.
2428 * It has the same effect as "sub name;", i.e. just a forward
2430 if (create && !GvCVu(gv))
2431 return newSUB(start_subparse(FALSE, 0),
2432 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2439 /* Be sure to refetch the stack pointer after calling these routines. */
2443 =head1 Callback Functions
2445 =for apidoc p||call_argv
2447 Performs a callback to the specified Perl sub. See L<perlcall>.
2453 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2455 /* See G_* flags in cop.h */
2456 /* null terminated arg list */
2464 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2469 return call_pv(sub_name, flags);
2473 =for apidoc p||call_pv
2475 Performs a callback to the specified Perl sub. See L<perlcall>.
2481 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2482 /* name of the subroutine */
2483 /* See G_* flags in cop.h */
2485 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2489 =for apidoc p||call_method
2491 Performs a callback to the specified Perl method. The blessed object must
2492 be on the stack. See L<perlcall>.
2498 Perl_call_method(pTHX_ const char *methname, I32 flags)
2499 /* name of the subroutine */
2500 /* See G_* flags in cop.h */
2502 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2505 /* May be called with any of a CV, a GV, or an SV containing the name. */
2507 =for apidoc p||call_sv
2509 Performs a callback to the Perl sub whose name is in the SV. See
2516 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2517 /* See G_* flags in cop.h */
2520 LOGOP myop; /* fake syntax tree node */
2523 volatile I32 retval = 0;
2525 bool oldcatch = CATCH_GET;
2527 OP* const oldop = PL_op;
2530 if (flags & G_DISCARD) {
2535 Zero(&myop, 1, LOGOP);
2536 myop.op_next = NULL;
2537 if (!(flags & G_NOARGS))
2538 myop.op_flags |= OPf_STACKED;
2539 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2540 (flags & G_ARRAY) ? OPf_WANT_LIST :
2545 EXTEND(PL_stack_sp, 1);
2546 *++PL_stack_sp = sv;
2548 oldscope = PL_scopestack_ix;
2550 if (PERLDB_SUB && PL_curstash != PL_debstash
2551 /* Handle first BEGIN of -d. */
2552 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2553 /* Try harder, since this may have been a sighandler, thus
2554 * curstash may be meaningless. */
2555 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2556 && !(flags & G_NODEBUG))
2557 PL_op->op_private |= OPpENTERSUB_DB;
2559 if (flags & G_METHOD) {
2560 Zero(&method_op, 1, UNOP);
2561 method_op.op_next = PL_op;
2562 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2563 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2564 PL_op = (OP*)&method_op;
2567 if (!(flags & G_EVAL)) {
2569 call_body((OP*)&myop, FALSE);
2570 retval = PL_stack_sp - (PL_stack_base + oldmark);
2571 CATCH_SET(oldcatch);
2574 myop.op_other = (OP*)&myop;
2576 /* we're trying to emulate pp_entertry() here */
2578 register PERL_CONTEXT *cx;
2579 const I32 gimme = GIMME_V;
2584 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2586 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2588 PL_in_eval = EVAL_INEVAL;
2589 if (flags & G_KEEPERR)
2590 PL_in_eval |= EVAL_KEEPERR;
2592 sv_setpvn(ERRSV,"",0);
2600 call_body((OP*)&myop, FALSE);
2601 retval = PL_stack_sp - (PL_stack_base + oldmark);
2602 if (!(flags & G_KEEPERR))
2603 sv_setpvn(ERRSV,"",0);
2609 /* my_exit() was called */
2610 PL_curstash = PL_defstash;
2613 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2614 Perl_croak(aTHX_ "Callback called exit");
2619 PL_op = PL_restartop;
2623 PL_stack_sp = PL_stack_base + oldmark;
2624 if (flags & G_ARRAY)
2628 *++PL_stack_sp = &PL_sv_undef;
2633 if (PL_scopestack_ix > oldscope) {
2637 register PERL_CONTEXT *cx;
2644 PERL_UNUSED_VAR(newsp);
2645 PERL_UNUSED_VAR(gimme);
2646 PERL_UNUSED_VAR(optype);
2651 if (flags & G_DISCARD) {
2652 PL_stack_sp = PL_stack_base + oldmark;
2662 S_call_body(pTHX_ const OP *myop, bool is_eval)
2665 if (PL_op == myop) {
2667 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2669 PL_op = Perl_pp_entersub(aTHX); /* this does */
2675 /* Eval a string. The G_EVAL flag is always assumed. */
2678 =for apidoc p||eval_sv
2680 Tells Perl to C<eval> the string in the SV.
2686 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2688 /* See G_* flags in cop.h */
2692 UNOP myop; /* fake syntax tree node */
2693 volatile I32 oldmark = SP - PL_stack_base;
2694 volatile I32 retval = 0;
2696 OP* const oldop = PL_op;
2699 if (flags & G_DISCARD) {
2706 Zero(PL_op, 1, UNOP);
2707 EXTEND(PL_stack_sp, 1);
2708 *++PL_stack_sp = sv;
2710 if (!(flags & G_NOARGS))
2711 myop.op_flags = OPf_STACKED;
2712 myop.op_next = NULL;
2713 myop.op_type = OP_ENTEREVAL;
2714 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2715 (flags & G_ARRAY) ? OPf_WANT_LIST :
2717 if (flags & G_KEEPERR)
2718 myop.op_flags |= OPf_SPECIAL;
2720 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2721 * before a PUSHEVAL, which corrupts the stack after a croak */
2722 TAINT_PROPER("eval_sv()");
2728 call_body((OP*)&myop,TRUE);
2729 retval = PL_stack_sp - (PL_stack_base + oldmark);
2730 if (!(flags & G_KEEPERR))
2731 sv_setpvn(ERRSV,"",0);
2737 /* my_exit() was called */
2738 PL_curstash = PL_defstash;
2741 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2742 Perl_croak(aTHX_ "Callback called exit");
2747 PL_op = PL_restartop;
2751 PL_stack_sp = PL_stack_base + oldmark;
2752 if (flags & G_ARRAY)
2756 *++PL_stack_sp = &PL_sv_undef;
2762 if (flags & G_DISCARD) {
2763 PL_stack_sp = PL_stack_base + oldmark;
2773 =for apidoc p||eval_pv
2775 Tells Perl to C<eval> the given string and return an SV* result.
2781 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2785 SV* sv = newSVpv(p, 0);
2787 eval_sv(sv, G_SCALAR);
2794 if (croak_on_error && SvTRUE(ERRSV)) {
2795 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2801 /* Require a module. */
2804 =head1 Embedding Functions
2806 =for apidoc p||require_pv
2808 Tells Perl to C<require> the file named by the string argument. It is
2809 analogous to the Perl code C<eval "require '$file'">. It's even
2810 implemented that way; consider using load_module instead.
2815 Perl_require_pv(pTHX_ const char *pv)
2820 PUSHSTACKi(PERLSI_REQUIRE);
2822 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2823 eval_sv(sv_2mortal(sv), G_DISCARD);
2829 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2831 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2834 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2838 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2840 /* This message really ought to be max 23 lines.
2841 * Removed -h because the user already knows that option. Others? */
2843 static const char * const usage_msg[] = {
2844 "-0[octal] specify record separator (\\0, if no argument)",
2845 "-A[mod][=pattern] activate all/given assertions",
2846 "-a autosplit mode with -n or -p (splits $_ into @F)",
2847 "-C[number/list] enables the listed Unicode features",
2848 "-c check syntax only (runs BEGIN and CHECK blocks)",
2849 "-d[:debugger] run program under debugger",
2850 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2851 "-e program one line of program (several -e's allowed, omit programfile)",
2852 "-E program like -e, but enables all optional features",
2853 "-f don't do $sitelib/sitecustomize.pl at startup",
2854 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2855 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2856 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2857 "-l[octal] enable line ending processing, specifies line terminator",
2858 "-[mM][-]module execute \"use/no module...\" before executing program",
2859 "-n assume \"while (<>) { ... }\" loop around program",
2860 "-p assume loop like -n but print line also, like sed",
2861 "-P run program through C preprocessor before compilation",
2862 "-s enable rudimentary parsing for switches after programfile",
2863 "-S look for programfile using PATH environment variable",
2864 "-t enable tainting warnings",
2865 "-T enable tainting checks",
2866 "-u dump core after parsing program",
2867 "-U allow unsafe operations",
2868 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2869 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2870 "-w enable many useful warnings (RECOMMENDED)",
2871 "-W enable all warnings",
2872 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2873 "-X disable all warnings",
2877 const char * const *p = usage_msg;
2879 PerlIO_printf(PerlIO_stdout(),
2880 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2883 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2886 /* convert a string of -D options (or digits) into an int.
2887 * sets *s to point to the char after the options */
2891 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2893 static const char * const usage_msgd[] = {
2894 " Debugging flag values: (see also -d)",
2895 " p Tokenizing and parsing (with v, displays parse stack)",
2896 " s Stack snapshots (with v, displays all stacks)",
2897 " l Context (loop) stack processing",
2898 " t Trace execution",
2899 " o Method and overloading resolution",
2900 " c String/numeric conversions",
2901 " P Print profiling info, preprocessor command for -P, source file input state",
2902 " m Memory allocation",
2903 " f Format processing",
2904 " r Regular expression parsing and execution",
2905 " x Syntax tree dump",
2906 " u Tainting checks",
2907 " H Hash dump -- usurps values()",
2908 " X Scratchpad allocation",
2910 " S Thread synchronization",
2912 " R Include reference counts of dumped variables (eg when using -Ds)",
2913 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2914 " v Verbose: use in conjunction with other flags",
2916 " A Consistency checks on internal structures",
2917 " q quiet - currently only suppresses the 'EXECUTING' message",
2922 /* if adding extra options, remember to update DEBUG_MASK */
2923 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2925 for (; isALNUM(**s); (*s)++) {
2926 const char * const d = strchr(debopts,**s);
2928 i |= 1 << (d - debopts);
2929 else if (ckWARN_d(WARN_DEBUGGING))
2930 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2931 "invalid option -D%c, use -D'' to see choices\n", **s);
2934 else if (isDIGIT(**s)) {
2936 for (; isALNUM(**s); (*s)++) ;
2938 else if (givehelp) {
2939 const char *const *p = usage_msgd;
2940 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2943 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2944 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2945 "-Dp not implemented on this platform\n");
2951 /* This routine handles any switches that can be given during run */
2954 Perl_moreswitches(pTHX_ char *s)
2965 SvREFCNT_dec(PL_rs);
2966 if (s[1] == 'x' && s[2]) {
2967 const char *e = s+=2;
2973 flags = PERL_SCAN_SILENT_ILLDIGIT;
2974 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2975 if (s + numlen < e) {
2976 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2980 PL_rs = newSVpvs("");
2981 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2982 tmps = (U8*)SvPVX(PL_rs);
2983 uvchr_to_utf8(tmps, rschar);
2984 SvCUR_set(PL_rs, UNISKIP(rschar));
2989 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2990 if (rschar & ~((U8)~0))
2991 PL_rs = &PL_sv_undef;
2992 else if (!rschar && numlen >= 2)
2993 PL_rs = newSVpvs("");
2995 char ch = (char)rschar;
2996 PL_rs = newSVpvn(&ch, 1);
2999 sv_setsv(get_sv("/", TRUE), PL_rs);
3004 PL_unicode = parse_unicode_opts( (const char **)&s );
3009 while (*s && !isSPACE(*s)) ++s;
3011 PL_splitstr = savepv(PL_splitstr);
3022 forbid_setid('d', -1);
3025 /* -dt indicates to the debugger that threads will be used */
3026 if (*s == 't' && !isALNUM(s[1])) {
3028 my_setenv("PERL5DB_THREADED", "1");
3031 /* The following permits -d:Mod to accepts arguments following an =
3032 in the fashion that -MSome::Mod does. */
3033 if (*s == ':' || *s == '=') {
3035 SV * const sv = newSVpvs("use Devel::");
3037 /* We now allow -d:Module=Foo,Bar */
3038 while(isALNUM(*s) || *s==':') ++s;
3040 sv_catpv(sv, start);
3042 sv_catpvn(sv, start, s-start);
3043 /* Don't use NUL as q// delimiter here, this string goes in the
3045 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3048 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3051 PL_perldb = PERLDB_ALL;
3058 forbid_setid('D', -1);
3060 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3061 #else /* !DEBUGGING */
3062 if (ckWARN_d(WARN_DEBUGGING))
3063 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3064 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3065 for (s++; isALNUM(*s); s++) ;
3070 usage(PL_origargv[0]);
3073 Safefree(PL_inplace);
3074 #if defined(__CYGWIN__) /* do backup extension automagically */
3075 if (*(s+1) == '\0') {
3076 PL_inplace = savepvs(".bak");
3079 #endif /* __CYGWIN__ */
3080 PL_inplace = savepv(s+1);
3081 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3085 if (*s == '-') /* Additional switches on #! line. */
3089 case 'I': /* -I handled both here and in parse_body() */
3090 forbid_setid('I', -1);
3092 while (*s && isSPACE(*s))
3097 /* ignore trailing spaces (possibly followed by other switches) */
3099 for (e = p; *e && !isSPACE(*e); e++) ;
3103 } while (*p && *p != '-');
3104 e = savepvn(s, e-s);
3105 incpush(e, TRUE, TRUE, FALSE, FALSE);
3112 Perl_croak(aTHX_ "No directory specified for -I");
3118 SvREFCNT_dec(PL_ors_sv);
3124 PL_ors_sv = newSVpvs("\n");
3125 numlen = 3 + (*s == '0');
3126 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3130 if (RsPARA(PL_rs)) {
3131 PL_ors_sv = newSVpvs("\n\n");
3134 PL_ors_sv = newSVsv(PL_rs);
3139 forbid_setid('A', -1);
3141 PL_preambleav = newAV();
3144 char * const start = s;
3145 SV * const sv = newSVpvs("use assertions::activate");
3146 while(isALNUM(*s) || *s == ':') ++s;
3148 sv_catpvs(sv, "::");
3149 sv_catpvn(sv, start, s-start);
3152 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3155 else if (*s != '\0') {
3156 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3158 av_push(PL_preambleav, sv);
3162 forbid_setid('M', -1); /* XXX ? */
3165 forbid_setid('m', -1); /* XXX ? */
3169 const char *use = "use ";
3170 /* -M-foo == 'no foo' */
3171 /* Leading space on " no " is deliberate, to make both
3172 possibilities the same length. */
3173 if (*s == '-') { use = " no "; ++s; }
3174 sv = newSVpvn(use,4);
3176 /* We allow -M'Module qw(Foo Bar)' */
3177 while(isALNUM(*s) || *s==':') ++s;
3179 sv_catpv(sv, start);
3180 if (*(start-1) == 'm') {
3182 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3183 sv_catpvs( sv, " ()");
3187 Perl_croak(aTHX_ "Module name required with -%c option",
3189 sv_catpvn(sv, start, s-start);
3190 sv_catpvs(sv, " split(/,/,q");
3191 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3193 sv_catpvs(sv, "\0)");
3197 PL_preambleav = newAV();
3198 av_push(PL_preambleav, sv);
3201 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3212 forbid_setid('s', -1);
3213 PL_doswitches = TRUE;
3227 #ifdef MACOS_TRADITIONAL
3228 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3230 PL_do_undump = TRUE;
3238 if (!sv_derived_from(PL_patchlevel, "version"))
3239 upg_version(PL_patchlevel);
3241 PerlIO_printf(PerlIO_stdout(),
3242 Perl_form(aTHX_ "\nThis is perl, %"SVf
3243 #ifdef PERL_PATCHNUM
3244 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3247 vstringify(PL_patchlevel),
3250 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3251 PerlIO_printf(PerlIO_stdout(),
3252 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3253 vstringify(PL_patchlevel)));
3254 PerlIO_printf(PerlIO_stdout(),
3255 Perl_form(aTHX_ " built under %s at %s %s\n",
3256 OSNAME, __DATE__, __TIME__));
3257 PerlIO_printf(PerlIO_stdout(),
3258 Perl_form(aTHX_ " OS Specific Release: %s\n",
3262 #if defined(LOCAL_PATCH_COUNT)
3263 if (LOCAL_PATCH_COUNT > 0)
3264 PerlIO_printf(PerlIO_stdout(),
3265 "\n(with %d registered patch%s, "
3266 "see perl -V for more detail)",
3267 (int)LOCAL_PATCH_COUNT,
3268 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "\n\nCopyright 1987-2006, Larry Wall\n");
3273 #ifdef MACOS_TRADITIONAL
3274 PerlIO_printf(PerlIO_stdout(),
3275 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3276 "maintained by Chris Nandor\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3285 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3290 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "atariST series port, ++jrb bammi@cadence.com\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "MiNT port by Guido Flohr, 1997-1999\n");
3325 PerlIO_printf(PerlIO_stdout(),
3326 "EPOC port by Olaf Flebbe, 1999-2002\n");
3329 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3330 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3333 #ifdef __SYMBIAN32__
3334 PerlIO_printf(PerlIO_stdout(),
3335 "Symbian port by Nokia, 2004-2005\n");
3337 #ifdef BINARY_BUILD_NOTICE
3338 BINARY_BUILD_NOTICE;
3340 PerlIO_printf(PerlIO_stdout(),
3342 Perl may be copied only under the terms of either the Artistic License or the\n\
3343 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3344 Complete documentation for Perl, including FAQ lists, should be found on\n\
3345 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3346 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3349 if (! (PL_dowarn & G_WARN_ALL_MASK))
3350 PL_dowarn |= G_WARN_ON;
3354 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3355 if (!specialWARN(PL_compiling.cop_warnings))
3356 SvREFCNT_dec(PL_compiling.cop_warnings);
3357 PL_compiling.cop_warnings = pWARN_ALL ;
3361 PL_dowarn = G_WARN_ALL_OFF;
3362 if (!specialWARN(PL_compiling.cop_warnings))
3363 SvREFCNT_dec(PL_compiling.cop_warnings);
3364 PL_compiling.cop_warnings = pWARN_NONE ;
3369 if (s[1] == '-') /* Additional switches on #! line. */
3374 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3380 #ifdef ALTERNATE_SHEBANG
3381 case 'S': /* OS/2 needs -S on "extproc" line. */
3389 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3394 /* compliments of Tom Christiansen */
3396 /* unexec() can be found in the Gnu emacs distribution */
3397 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3400 Perl_my_unexec(pTHX)
3402 PERL_UNUSED_CONTEXT;
3404 SV * prog = newSVpv(BIN_EXP, 0);
3405 SV * file = newSVpv(PL_origfilename, 0);
3409 sv_catpvs(prog, "/perl");
3410 sv_catpvs(file, ".perldump");
3412 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3413 /* unexec prints msg to stderr in case of failure */
3414 PerlProc_exit(status);
3417 # include <lib$routines.h>
3418 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3419 # elif defined(WIN32) || defined(__CYGWIN__)
3420 Perl_croak(aTHX_ "dump is not supported");
3422 ABORT(); /* for use with undump */
3427 /* initialize curinterp */
3433 # define PERLVAR(var,type)
3434 # define PERLVARA(var,n,type)
3435 # if defined(PERL_IMPLICIT_CONTEXT)
3436 # define PERLVARI(var,type,init) aTHX->var = init;
3437 # define PERLVARIC(var,type,init) aTHX->var = init;
3439 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3440 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3442 # include "intrpvar.h"
3443 # include "thrdvar.h"
3449 # define PERLVAR(var,type)
3450 # define PERLVARA(var,n,type)
3451 # define PERLVARI(var,type,init) PL_##var = init;
3452 # define PERLVARIC(var,type,init) PL_##var = init;
3453 # include "intrpvar.h"
3454 # include "thrdvar.h"
3464 S_init_main_stash(pTHX)
3469 PL_curstash = PL_defstash = newHV();
3470 /* We know that the string "main" will be in the global shared string
3471 table, so it's a small saving to use it rather than allocate another
3473 PL_curstname = newSVpvs_share("main");
3474 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3475 /* If we hadn't caused another reference to "main" to be in the shared
3476 string table above, then it would be worth reordering these two,
3477 because otherwise all we do is delete "main" from it as a consequence
3478 of the SvREFCNT_dec, only to add it again with hv_name_set */
3479 SvREFCNT_dec(GvHV(gv));
3480 hv_name_set(PL_defstash, "main", 4, 0);
3481 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3483 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3485 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3486 GvMULTI_on(PL_incgv);
3487 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3488 GvMULTI_on(PL_hintgv);
3489 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3490 SvREFCNT_inc_simple(PL_defgv);
3491 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3492 SvREFCNT_inc_simple(PL_errgv);
3493 GvMULTI_on(PL_errgv);
3494 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3495 GvMULTI_on(PL_replgv);
3496 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3497 #ifdef PERL_DONT_CREATE_GVSV
3500 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3501 sv_setpvn(ERRSV, "", 0);
3502 PL_curstash = PL_defstash;
3503 CopSTASH_set(&PL_compiling, PL_defstash);
3504 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3505 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3507 /* We must init $/ before switches are processed. */
3508 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3512 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3518 const char *cpp_discard_flag;
3527 PL_origfilename = savepvs("-e");
3530 /* if find_script() returns, it returns a malloc()-ed value */
3531 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3533 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3534 const char *s = scriptname + 8;
3540 * Tell apart "normal" usage of fdscript, e.g.
3541 * with bash on FreeBSD:
3542 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3543 * from usage in suidperl.
3544 * Does any "normal" usage leave garbage after the number???
3545 * Is it a mistake to use a similar /dev/fd/ construct for
3550 * Be supersafe and do some sanity-checks.
3551 * Still, can we be sure we got the right thing?
3554 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3557 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3559 scriptname = savepv(s + 1);
3560 Safefree(PL_origfilename);
3561 PL_origfilename = (char *)scriptname;
3566 CopFILE_free(PL_curcop);
3567 CopFILE_set(PL_curcop, PL_origfilename);
3568 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3569 scriptname = (char *)"";
3570 if (fdscript >= 0) {
3571 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3572 # if defined(HAS_FCNTL) && defined(F_SETFD)
3574 /* ensure close-on-exec */
3575 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3580 Perl_croak(aTHX_ "sperl needs fd script\n"
3581 "You should not call sperl directly; do you need to "
3582 "change a #! line\nfrom sperl to perl?\n");
3585 * Do not open (or do other fancy stuff) while setuid.
3586 * Perl does the open, and hands script to suidperl on a fd;
3587 * suidperl only does some checks, sets up UIDs and re-execs
3588 * perl with that fd as it has always done.
3591 if (*suidscript != 1) {
3592 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3595 else if (PL_preprocess) {
3596 const char * const cpp_cfg = CPPSTDIN;
3597 SV * const cpp = newSVpvs("");
3598 SV * const cmd = newSV(0);
3600 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3601 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3602 if (strEQ(cpp_cfg, "cppstdin"))
3603 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3604 sv_catpv(cpp, cpp_cfg);
3607 sv_catpvs(sv, "-I");
3608 sv_catpv(sv,PRIVLIB_EXP);
3611 DEBUG_P(PerlIO_printf(Perl_debug_log,
3612 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3613 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3616 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3623 cpp_discard_flag = "";
3625 cpp_discard_flag = "-C";
3629 perl = os2_execname(aTHX);
3631 perl = PL_origargv[0];
3635 /* This strips off Perl comments which might interfere with
3636 the C pre-processor, including #!. #line directives are
3637 deliberately stripped to avoid confusion with Perl's version
3638 of #line. FWP played some golf with it so it will fit
3639 into VMS's 255 character buffer.
3642 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3644 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3646 Perl_sv_setpvf(aTHX_ cmd, "\
3647 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3648 perl, quote, code, quote, scriptname, cpp,
3649 cpp_discard_flag, sv, CPPMINUS);
3651 PL_doextract = FALSE;
3653 DEBUG_P(PerlIO_printf(Perl_debug_log,
3654 "PL_preprocess: cmd=\"%s\"\n",
3657 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3661 else if (!*scriptname) {
3662 forbid_setid(0, *suidscript);
3663 PL_rsfp = PerlIO_stdin();
3666 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3667 # if defined(HAS_FCNTL) && defined(F_SETFD)
3669 /* ensure close-on-exec */
3670 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3673 #endif /* IAMSUID */
3675 /* PSz 16 Sep 03 Keep neat error message */
3677 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3679 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3680 CopFILE(PL_curcop), Strerror(errno));
3686 * I_SYSSTATVFS HAS_FSTATVFS
3688 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3689 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3690 * here so that metaconfig picks them up. */
3694 S_fd_on_nosuid_fs(pTHX_ int fd)
3697 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3698 * but is needed also on machines without setreuid.
3699 * Seems safe enough to run as root.
3701 int check_okay = 0; /* able to do all the required sys/libcalls */
3702 int on_nosuid = 0; /* the fd is on a nosuid fs */
3704 * Need to check noexec also: nosuid might not be set, the average
3705 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3707 int on_noexec = 0; /* the fd is on a noexec fs */
3710 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3711 * fstatvfs() is UNIX98.
3712 * fstatfs() is 4.3 BSD.
3713 * ustat()+getmnt() is pre-4.3 BSD.
3714 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3715 * an irrelevant filesystem while trying to reach the right one.
3718 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3720 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3721 defined(HAS_FSTATVFS)
3722 # define FD_ON_NOSUID_CHECK_OKAY
3723 struct statvfs stfs;
3725 check_okay = fstatvfs(fd, &stfs) == 0;
3726 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3728 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3729 on platforms where it is present. */
3730 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3732 # endif /* fstatvfs */
3734 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3735 defined(PERL_MOUNT_NOSUID) && \
3736 defined(PERL_MOUNT_NOEXEC) && \
3737 defined(HAS_FSTATFS) && \
3738 defined(HAS_STRUCT_STATFS) && \
3739 defined(HAS_STRUCT_STATFS_F_FLAGS)
3740 # define FD_ON_NOSUID_CHECK_OKAY
3743 check_okay = fstatfs(fd, &stfs) == 0;
3744 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3745 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3746 # endif /* fstatfs */
3748 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3749 defined(PERL_MOUNT_NOSUID) && \
3750 defined(PERL_MOUNT_NOEXEC) && \
3751 defined(HAS_FSTAT) && \
3752 defined(HAS_USTAT) && \
3753 defined(HAS_GETMNT) && \
3754 defined(HAS_STRUCT_FS_DATA) && \
3756 # define FD_ON_NOSUID_CHECK_OKAY
3759 if (fstat(fd, &fdst) == 0) {
3761 if (ustat(fdst.st_dev, &us) == 0) {
3763 /* NOSTAT_ONE here because we're not examining fields which
3764 * vary between that case and STAT_ONE. */
3765 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3766 size_t cmplen = sizeof(us.f_fname);
3767 if (sizeof(fsd.fd_req.path) < cmplen)
3768 cmplen = sizeof(fsd.fd_req.path);
3769 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3770 fdst.st_dev == fsd.fd_req.dev) {
3772 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3773 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3778 # endif /* fstat+ustat+getmnt */
3780 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3781 defined(HAS_GETMNTENT) && \
3782 defined(HAS_HASMNTOPT) && \
3783 defined(MNTOPT_NOSUID) && \
3784 defined(MNTOPT_NOEXEC)
3785 # define FD_ON_NOSUID_CHECK_OKAY
3786 FILE *mtab = fopen("/etc/mtab", "r");
3787 struct mntent *entry;
3790 if (mtab && (fstat(fd, &stb) == 0)) {
3791 while (entry = getmntent(mtab)) {
3792 if (stat(entry->mnt_dir, &fsb) == 0
3793 && fsb.st_dev == stb.st_dev)
3795 /* found the filesystem */
3797 if (hasmntopt(entry, MNTOPT_NOSUID))
3799 if (hasmntopt(entry, MNTOPT_NOEXEC))
3802 } /* A single fs may well fail its stat(). */
3807 # endif /* getmntent+hasmntopt */
3810 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3812 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3814 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3815 return ((!check_okay) || on_nosuid || on_noexec);
3817 #endif /* IAMSUID */
3820 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3821 int fdscript, int suidscript)
3826 #endif /* IAMSUID */
3828 /* do we need to emulate setuid on scripts? */
3830 /* This code is for those BSD systems that have setuid #! scripts disabled
3831 * in the kernel because of a security problem. Merely defining DOSUID
3832 * in perl will not fix that problem, but if you have disabled setuid
3833 * scripts in the kernel, this will attempt to emulate setuid and setgid
3834 * on scripts that have those now-otherwise-useless bits set. The setuid
3835 * root version must be called suidperl or sperlN.NNN. If regular perl
3836 * discovers that it has opened a setuid script, it calls suidperl with
3837 * the same argv that it had. If suidperl finds that the script it has
3838 * just opened is NOT setuid root, it sets the effective uid back to the
3839 * uid. We don't just make perl setuid root because that loses the
3840 * effective uid we had before invoking perl, if it was different from the
3843 * Description/comments above do not match current workings:
3844 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3845 * suidperl called with script open and name changed to /dev/fd/N/X;
3846 * suidperl croaks if script is not setuid;
3847 * making perl setuid would be a huge security risk (and yes, that
3848 * would lose any euid we might have had).
3850 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3851 * be defined in suidperl only. suidperl must be setuid root. The
3852 * Configure script will set this up for you if you want it.
3858 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3859 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3860 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3862 const char *linestr;
3866 if (fdscript < 0 || suidscript != 1)
3867 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3869 * Since the script is opened by perl, not suidperl, some of these
3870 * checks are superfluous. Leaving them in probably does not lower
3874 * Do checks even for systems with no HAS_SETREUID.
3875 * We used to swap, then re-swap UIDs with
3877 if (setreuid(PL_euid,PL_uid) < 0
3878 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3879 Perl_croak(aTHX_ "Can't swap uid and euid");
3882 if (setreuid(PL_uid,PL_euid) < 0
3883 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3884 Perl_croak(aTHX_ "Can't reswap uid and euid");
3888 /* On this access check to make sure the directories are readable,
3889 * there is actually a small window that the user could use to make
3890 * filename point to an accessible directory. So there is a faint
3891 * chance that someone could execute a setuid script down in a
3892 * non-accessible directory. I don't know what to do about that.
3893 * But I don't think it's too important. The manual lies when
3894 * it says access() is useful in setuid programs.
3896 * So, access() is pretty useless... but not harmful... do anyway.
3898 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3899 Perl_croak(aTHX_ "Can't access() script\n");
3902 /* If we can swap euid and uid, then we can determine access rights
3903 * with a simple stat of the file, and then compare device and
3904 * inode to make sure we did stat() on the same file we opened.
3905 * Then we just have to make sure he or she can execute it.
3908 * As the script is opened by perl, not suidperl, we do not need to
3909 * care much about access rights.
3911 * The 'script changed' check is needed, or we can get lied to
3912 * about $0 with e.g.
3913 * suidperl /dev/fd/4//bin/x 4<setuidscript
3914 * Without HAS_SETREUID, is it safe to stat() as root?
3916 * Are there any operating systems that pass /dev/fd/xxx for setuid
3917 * scripts, as suggested/described in perlsec(1)? Surely they do not
3918 * pass the script name as we do, so the "script changed" test would
3919 * fail for them... but we never get here with
3920 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3922 * This is one place where we must "lie" about return status: not
3923 * say if the stat() failed. We are doing this as root, and could
3924 * be tricked into reporting existence or not of files that the
3925 * "plain" user cannot even see.
3929 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3930 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3931 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3932 Perl_croak(aTHX_ "Setuid script changed\n");
3936 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3937 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3940 * We used to do this check as the "plain" user (after swapping
3941 * UIDs). But the check for nosuid and noexec filesystem is needed,
3942 * and should be done even without HAS_SETREUID. (Maybe those
3943 * operating systems do not have such mount options anyway...)
3944 * Seems safe enough to do as root.
3946 #if !defined(NO_NOSUID_CHECK)
3947 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3948 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3951 #endif /* IAMSUID */
3953 if (!S_ISREG(PL_statbuf.st_mode)) {
3954 Perl_croak(aTHX_ "Setuid script not plain file\n");
3956 if (PL_statbuf.st_mode & S_IWOTH)
3957 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3958 PL_doswitches = FALSE; /* -s is insecure in suid */
3959 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3960 CopLINE_inc(PL_curcop);
3961 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3962 Perl_croak(aTHX_ "No #! line");
3963 linestr = SvPV_nolen_const(PL_linestr);
3964 /* required even on Sys V */
3965 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3966 Perl_croak(aTHX_ "No #! line");
3970 /* Sanity check on line length */
3971 s_end = s + strlen(s);
3972 if (s_end == s || (s_end - s) > 4000)
3973 Perl_croak(aTHX_ "Very long #! line");
3974 /* Allow more than a single space after #! */
3975 while (isSPACE(*s)) s++;
3976 /* Sanity check on buffer end */
3977 while ((*s) && !isSPACE(*s)) s++;
3978 for (s2 = s; (s2 > linestr &&
3979 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3980 || s2[-1] == '-')); s2--) ;
3981 /* Sanity check on buffer start */
3982 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3983 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3984 Perl_croak(aTHX_ "Not a perl script");
3985 while (*s == ' ' || *s == '\t') s++;
3987 * #! arg must be what we saw above. They can invoke it by
3988 * mentioning suidperl explicitly, but they may not add any strange
3989 * arguments beyond what #! says if they do invoke suidperl that way.
3992 * The way validarg was set up, we rely on the kernel to start
3993 * scripts with argv[1] set to contain all #! line switches (the
3997 * Check that we got all the arguments listed in the #! line (not
3998 * just that there are no extraneous arguments). Might not matter
3999 * much, as switches from #! line seem to be acted upon (also), and
4000 * so may be checked and trapped in perl. But, security checks must
4001 * be done in suidperl and not deferred to perl. Note that suidperl
4002 * does not get around to parsing (and checking) the switches on
4003 * the #! line (but execs perl sooner).
4004 * Allow (require) a trailing newline (which may be of two
4005 * characters on some architectures?) (but no other trailing
4008 len = strlen(validarg);
4009 if (strEQ(validarg," PHOOEY ") ||
4010 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4011 !((s_end - s) == len+1
4012 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4013 Perl_croak(aTHX_ "Args must match #! line");
4017 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4018 PL_euid == PL_statbuf.st_uid)
4020 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4021 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4022 #endif /* IAMSUID */
4025 PL_euid) { /* oops, we're not the setuid root perl */
4027 * When root runs a setuid script, we do not go through the same
4028 * steps of execing sperl and then perl with fd scripts, but
4029 * simply set up UIDs within the same perl invocation; so do
4030 * not have the same checks (on options, whatever) that we have
4031 * for plain users. No problem really: would have to be a script
4032 * that does not actually work for plain users; and if root is
4033 * foolish and can be persuaded to run such an unsafe script, he
4034 * might run also non-setuid ones, and deserves what he gets.
4036 * Or, we might drop the PL_euid check above (and rely just on
4037 * fdscript to avoid loops), and do the execs
4043 * Pass fd script to suidperl.
4044 * Exec suidperl, substituting fd script for scriptname.
4045 * Pass script name as "subdir" of fd, which perl will grok;
4046 * in fact will use that to distinguish this from "normal"
4047 * usage, see comments above.
4049 PerlIO_rewind(PL_rsfp);
4050 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4051 /* PSz 27 Feb 04 Sanity checks on scriptname */
4052 if ((!scriptname) || (!*scriptname) ) {
4053 Perl_croak(aTHX_ "No setuid script name\n");
4055 if (*scriptname == '-') {
4056 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4057 /* Or we might confuse it with an option when replacing
4058 * name in argument list, below (though we do pointer, not
4059 * string, comparisons).
4062 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4063 if (!PL_origargv[which]) {
4064 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4066 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4067 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4068 #if defined(HAS_FCNTL) && defined(F_SETFD)
4069 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4072 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4073 (int)PERL_REVISION, (int)PERL_VERSION,
4074 (int)PERL_SUBVERSION), PL_origargv);
4076 #endif /* IAMSUID */
4077 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4080 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4082 * This seems back to front: we try HAS_SETEGID first; if not available
4083 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4084 * in the sense that we only want to set EGID; but are there any machines
4085 * with either of the latter, but not the former? Same with UID, later.
4088 (void)setegid(PL_statbuf.st_gid);
4091 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4093 #ifdef HAS_SETRESGID
4094 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4096 PerlProc_setgid(PL_statbuf.st_gid);
4100 if (PerlProc_getegid() != PL_statbuf.st_gid)
4101 Perl_croak(aTHX_ "Can't do setegid!\n");
4103 if (PL_statbuf.st_mode & S_ISUID) {
4104 if (PL_statbuf.st_uid != PL_euid)
4106 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4109 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4111 #ifdef HAS_SETRESUID
4112 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4114 PerlProc_setuid(PL_statbuf.st_uid);
4118 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4119 Perl_croak(aTHX_ "Can't do seteuid!\n");
4121 else if (PL_uid) { /* oops, mustn't run as root */
4123 (void)seteuid((Uid_t)PL_uid);
4126 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4128 #ifdef HAS_SETRESUID
4129 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4131 PerlProc_setuid((Uid_t)PL_uid);
4135 if (PerlProc_geteuid() != PL_uid)
4136 Perl_croak(aTHX_ "Can't do seteuid!\n");
4139 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4140 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4143 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4144 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4145 else if (fdscript < 0 || suidscript != 1)
4146 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4147 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4149 /* PSz 16 Sep 03 Keep neat error message */
4150 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4153 /* We absolutely must clear out any saved ids here, so we */
4154 /* exec the real perl, substituting fd script for scriptname. */
4155 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4157 * It might be thought that using setresgid and/or setresuid (changed to
4158 * set the saved IDs) above might obviate the need to exec, and we could
4159 * go on to "do the perl thing".
4161 * Is there such a thing as "saved GID", and is that set for setuid (but
4162 * not setgid) execution like suidperl? Without exec, it would not be
4163 * cleared for setuid (but not setgid) scripts (or might need a dummy
4166 * We need suidperl to do the exact same argument checking that perl
4167 * does. Thus it cannot be very small; while it could be significantly
4168 * smaller, it is safer (simpler?) to make it essentially the same
4169 * binary as perl (but they are not identical). - Maybe could defer that
4170 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4171 * but prefer to do thorough checks in suidperl itself. Such deferral
4172 * would make suidperl security rely on perl, a design no-no.
4174 * Setuid things should be short and simple, thus easy to understand and
4175 * verify. They should do their "own thing", without influence by
4176 * attackers. It may help if their internal execution flow is fixed,
4177 * regardless of platform: it may be best to exec anyway.
4179 * Suidperl should at least be conceptually simple: a wrapper only,
4180 * never to do any real perl. Maybe we should put
4182 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4184 * into the perly bits.
4186 PerlIO_rewind(PL_rsfp);
4187 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4189 * Keep original arguments: suidperl already has fd script.
4191 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4192 /* if (!PL_origargv[which]) { */
4193 /* errno = EPERM; */
4194 /* Perl_croak(aTHX_ "Permission denied\n"); */
4196 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4197 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4198 #if defined(HAS_FCNTL) && defined(F_SETFD)
4199 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4202 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4203 (int)PERL_REVISION, (int)PERL_VERSION,
4204 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4206 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4207 #endif /* IAMSUID */
4209 PERL_UNUSED_ARG(fdscript);
4210 PERL_UNUSED_ARG(suidscript);
4211 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4212 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4213 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4214 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4216 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4219 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4220 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4221 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4222 /* not set-id, must be wrapped */
4225 PERL_UNUSED_ARG(validarg);
4226 PERL_UNUSED_ARG(scriptname);
4230 S_find_beginning(pTHX)
4234 register const char *s2;
4235 #ifdef MACOS_TRADITIONAL
4239 /* skip forward in input to the real script? */
4241 #ifdef MACOS_TRADITIONAL
4242 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4244 while (PL_doextract || gMacPerl_AlwaysExtract) {
4245 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4246 if (!gMacPerl_AlwaysExtract)
4247 Perl_croak(aTHX_ "No Perl script found in input\n");
4249 if (PL_doextract) /* require explicit override ? */
4250 if (!OverrideExtract(PL_origfilename))
4251 Perl_croak(aTHX_ "User aborted script\n");
4253 PL_doextract = FALSE;
4255 /* Pater peccavi, file does not have #! */
4256 PerlIO_rewind(PL_rsfp);
4261 while (PL_doextract) {
4262 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4263 Perl_croak(aTHX_ "No Perl script found in input\n");
4266 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4267 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4268 PL_doextract = FALSE;
4269 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4271 while (*s == ' ' || *s == '\t') s++;
4273 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4274 || s2[-1] == '_') s2--;
4275 if (strnEQ(s2-4,"perl",4))
4276 while ((s = moreswitches(s)))
4279 #ifdef MACOS_TRADITIONAL
4280 /* We are always searching for the #!perl line in MacPerl,
4281 * so if we find it, still keep the line count correct
4282 * by counting lines we already skipped over
4284 for (; maclines > 0 ; maclines--)
4285 PerlIO_ungetc(PL_rsfp, '\n');
4289 /* gMacPerl_AlwaysExtract is false in MPW tool */
4290 } else if (gMacPerl_AlwaysExtract) {
4302 PL_uid = PerlProc_getuid();
4303 PL_euid = PerlProc_geteuid();
4304 PL_gid = PerlProc_getgid();
4305 PL_egid = PerlProc_getegid();
4307 PL_uid |= PL_gid << 16;
4308 PL_euid |= PL_egid << 16;
4310 /* Should not happen: */
4311 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4312 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4315 * Should go by suidscript, not uid!=euid: why disallow
4316 * system("ls") in scripts run from setuid things?
4317 * Or, is this run before we check arguments and set suidscript?
4318 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4319 * (We never have suidscript, can we be sure to have fdscript?)
4320 * Or must then go by UID checks? See comments in forbid_setid also.
4324 /* This is used very early in the lifetime of the program,
4325 * before even the options are parsed, so PL_tainting has
4326 * not been initialized properly. */
4328 Perl_doing_taint(int argc, char *argv[], char *envp[])
4330 #ifndef PERL_IMPLICIT_SYS
4331 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4332 * before we have an interpreter-- and the whole point of this
4333 * function is to be called at such an early stage. If you are on
4334 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4335 * "tainted because running with altered effective ids', you'll
4336 * have to add your own checks somewhere in here. The two most
4337 * known samples of 'implicitness' are Win32 and NetWare, neither
4338 * of which has much of concept of 'uids'. */
4339 int uid = PerlProc_getuid();
4340 int euid = PerlProc_geteuid();
4341 int gid = PerlProc_getgid();
4342 int egid = PerlProc_getegid();
4349 if (uid && (euid != uid || egid != gid))
4351 #endif /* !PERL_IMPLICIT_SYS */
4352 /* This is a really primitive check; environment gets ignored only
4353 * if -T are the first chars together; otherwise one gets
4354 * "Too late" message. */
4355 if ( argc > 1 && argv[1][0] == '-'
4356 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4361 /* Passing the flag as a single char rather than a string is a slight space
4362 optimisation. The only message that isn't /^-.$/ is
4363 "program input from stdin", which is substituted in place of '\0', which
4364 could never be a command line flag. */
4366 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4369 char string[3] = "-x";
4370 const char *message = "program input from stdin";
4377 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4378 if (PL_euid != PL_uid)
4379 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4380 if (PL_egid != PL_gid)
4381 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4382 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4384 * Checks for UID/GID above "wrong": why disallow
4385 * perl -e 'print "Hello\n"'
4386 * from within setuid things?? Simply drop them: replaced by
4387 * fdscript/suidscript and #ifdef IAMSUID checks below.
4389 * This may be too late for command-line switches. Will catch those on
4390 * the #! line, after finding the script name and setting up
4391 * fdscript/suidscript. Note that suidperl does not get around to
4392 * parsing (and checking) the switches on the #! line, but checks that
4393 * the two sets are identical.
4395 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4396 * instead, or would that be "too late"? (We never have suidscript, can
4397 * we be sure to have fdscript?)
4399 * Catch things with suidscript (in descendant of suidperl), even with
4400 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4401 * below; but I am paranoid.
4403 * Also see comments about root running a setuid script, elsewhere.
4405 if (suidscript >= 0)
4406 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4408 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4409 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4410 #endif /* IAMSUID */
4414 Perl_init_debugger(pTHX)
4417 HV * const ostash = PL_curstash;
4419 PL_curstash = PL_debstash;
4420 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4422 AvREAL_off(PL_dbargs);
4423 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4424 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4425 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4426 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4427 sv_setiv(PL_DBsingle, 0);
4428 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4429 sv_setiv(PL_DBtrace, 0);
4430 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4431 sv_setiv(PL_DBsignal, 0);
4432 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4433 sv_setiv(PL_DBassertion, 0);
4434 PL_curstash = ostash;
4437 #ifndef STRESS_REALLOC
4438 #define REASONABLE(size) (size)
4440 #define REASONABLE(size) (1) /* unreasonable */
4444 Perl_init_stacks(pTHX)
4447 /* start with 128-item stack and 8K cxstack */
4448 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4449 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4450 PL_curstackinfo->si_type = PERLSI_MAIN;
4451 PL_curstack = PL_curstackinfo->si_stack;
4452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4454 PL_stack_base = AvARRAY(PL_curstack);
4455 PL_stack_sp = PL_stack_base;
4456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4458 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4461 PL_tmps_max = REASONABLE(128);
4463 Newx(PL_markstack,REASONABLE(32),I32);
4464 PL_markstack_ptr = PL_markstack;
4465 PL_markstack_max = PL_markstack + REASONABLE(32);
4469 Newx(PL_scopestack,REASONABLE(32),I32);
4470 PL_scopestack_ix = 0;
4471 PL_scopestack_max = REASONABLE(32);
4473 Newx(PL_savestack,REASONABLE(128),ANY);
4474 PL_savestack_ix = 0;
4475 PL_savestack_max = REASONABLE(128);
4484 while (PL_curstackinfo->si_next)
4485 PL_curstackinfo = PL_curstackinfo->si_next;
4486 while (PL_curstackinfo) {
4487 PERL_SI *p = PL_curstackinfo->si_prev;
4488 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4489 Safefree(PL_curstackinfo->si_cxstack);
4490 Safefree(PL_curstackinfo);
4491 PL_curstackinfo = p;
4493 Safefree(PL_tmps_stack);
4494 Safefree(PL_markstack);
4495 Safefree(PL_scopestack);
4496 Safefree(PL_savestack);
4506 lex_start(PL_linestr);
4508 PL_subname = newSVpvs("main");
4512 S_init_predump_symbols(pTHX)
4518 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4519 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4520 GvMULTI_on(PL_stdingv);
4521 io = GvIOp(PL_stdingv);
4522 IoTYPE(io) = IoTYPE_RDONLY;
4523 IoIFP(io) = PerlIO_stdin();
4524 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4526 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4528 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4531 IoTYPE(io) = IoTYPE_WRONLY;
4532 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4534 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4536 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4538 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4539 GvMULTI_on(PL_stderrgv);
4540 io = GvIOp(PL_stderrgv);
4541 IoTYPE(io) = IoTYPE_WRONLY;
4542 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4543 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4545 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4547 PL_statname = newSV(0); /* last filename we did stat on */
4549 Safefree(PL_osname);
4550 PL_osname = savepv(OSNAME);
4554 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4557 argc--,argv++; /* skip name of script */
4558 if (PL_doswitches) {
4559 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4563 if (argv[0][1] == '-' && !argv[0][2]) {
4567 if ((s = strchr(argv[0], '='))) {
4568 const char *const start_name = argv[0] + 1;
4569 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4570 TRUE, SVt_PV)), s + 1);
4573 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4576 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4577 GvMULTI_on(PL_argvgv);
4578 (void)gv_AVadd(PL_argvgv);
4579 av_clear(GvAVn(PL_argvgv));
4580 for (; argc > 0; argc--,argv++) {
4581 SV * const sv = newSVpv(argv[0],0);
4582 av_push(GvAVn(PL_argvgv),sv);
4583 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4584 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4587 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4588 (void)sv_utf8_decode(sv);
4594 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4599 PL_toptarget = newSV(0);
4600 sv_upgrade(PL_toptarget, SVt_PVFM);
4601 sv_setpvn(PL_toptarget, "", 0);
4602 PL_bodytarget = newSV(0);
4603 sv_upgrade(PL_bodytarget, SVt_PVFM);
4604 sv_setpvn(PL_bodytarget, "", 0);
4605 PL_formtarget = PL_bodytarget;
4609 init_argv_symbols(argc,argv);
4611 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4612 #ifdef MACOS_TRADITIONAL
4613 /* $0 is not majick on a Mac */
4614 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4616 sv_setpv(GvSV(tmpgv),PL_origfilename);
4617 magicname("0", "0", 1);
4620 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4622 GvMULTI_on(PL_envgv);
4623 hv = GvHVn(PL_envgv);
4624 hv_magic(hv, NULL, PERL_MAGIC_env);
4626 #ifdef USE_ENVIRON_ARRAY
4627 /* Note that if the supplied env parameter is actually a copy
4628 of the global environ then it may now point to free'd memory
4629 if the environment has been modified since. To avoid this
4630 problem we treat env==NULL as meaning 'use the default'
4635 # ifdef USE_ITHREADS
4636 && PL_curinterp == aTHX
4643 char** origenv = environ;
4646 for (; *env; env++) {
4647 if (!(s = strchr(*env,'=')) || s == *env)
4649 #if defined(MSDOS) && !defined(DJGPP)
4654 sv = newSVpv(s+1, 0);
4655 (void)hv_store(hv, *env, s - *env, sv, 0);
4658 if (origenv != environ) {
4659 /* realloc has shifted us */
4660 env = (env - origenv) + environ;
4665 #endif /* USE_ENVIRON_ARRAY */
4666 #endif /* !PERL_MICRO */
4669 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4670 SvREADONLY_off(GvSV(tmpgv));
4671 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4672 SvREADONLY_on(GvSV(tmpgv));
4674 #ifdef THREADS_HAVE_PIDS
4675 PL_ppid = (IV)getppid();
4678 /* touch @F array to prevent spurious warnings 20020415 MJD */
4680 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4682 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4683 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4684 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4688 S_init_perllib(pTHX)
4694 s = PerlEnv_getenv("PERL5LIB");
4696 * It isn't possible to delete an environment variable with
4697 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4698 * case we treat PERL5LIB as undefined if it has a zero-length value.
4700 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4701 if (s && *s != '\0')
4705 incpush(s, TRUE, TRUE, TRUE, FALSE);
4707 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4709 /* Treat PERL5?LIB as a possible search list logical name -- the
4710 * "natural" VMS idiom for a Unix path string. We allow each
4711 * element to be a set of |-separated directories for compatibility.
4715 if (my_trnlnm("PERL5LIB",buf,0))
4716 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4718 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4722 /* Use the ~-expanded versions of APPLLIB (undocumented),
4723 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4726 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4730 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4732 #ifdef MACOS_TRADITIONAL
4735 SV * privdir = newSV(0);
4736 char * macperl = PerlEnv_getenv("MACPERL");
4741 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4742 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4743 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4744 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4745 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4746 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4748 SvREFCNT_dec(privdir);
4751 incpush(":", FALSE, FALSE, TRUE, FALSE);
4754 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4757 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4759 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4763 /* sitearch is always relative to sitelib on Windows for
4764 * DLL-based path intuition to work correctly */
4765 # if !defined(WIN32)
4766 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4772 /* this picks up sitearch as well */
4773 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4775 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4779 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4780 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4783 #ifdef PERL_VENDORARCH_EXP
4784 /* vendorarch is always relative to vendorlib on Windows for
4785 * DLL-based path intuition to work correctly */
4786 # if !defined(WIN32)
4787 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4791 #ifdef PERL_VENDORLIB_EXP
4793 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4795 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4799 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4800 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4803 #ifdef PERL_OTHERLIBDIRS
4804 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4808 incpush(".", FALSE, FALSE, TRUE, FALSE);
4809 #endif /* MACOS_TRADITIONAL */
4812 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4813 # define PERLLIB_SEP ';'
4816 # define PERLLIB_SEP '|'
4818 # if defined(MACOS_TRADITIONAL)
4819 # define PERLLIB_SEP ','
4821 # define PERLLIB_SEP ':'
4825 #ifndef PERLLIB_MANGLE
4826 # define PERLLIB_MANGLE(s,n) (s)
4829 /* Push a directory onto @INC if it exists.
4830 Generate a new SV if we do this, to save needing to copy the SV we push
4833 S_incpush_if_exists(pTHX_ SV *dir)
4837 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4838 S_ISDIR(tmpstatbuf.st_mode)) {
4839 av_push(GvAVn(PL_incgv), dir);
4846 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4851 const char *p = dir;
4856 if (addsubdirs || addoldvers) {
4860 /* Break at all separators */
4862 SV *libdir = newSV(0);
4865 /* skip any consecutive separators */
4867 while ( *p == PERLLIB_SEP ) {
4868 /* Uncomment the next line for PATH semantics */
4869 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4874 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4875 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4880 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4881 p = NULL; /* break out */
4883 #ifdef MACOS_TRADITIONAL
4884 if (!strchr(SvPVX(libdir), ':')) {
4887 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4889 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4890 sv_catpvs(libdir, ":");
4893 /* Do the if() outside the #ifdef to avoid warnings about an unused
4896 #ifdef PERL_RELOCATABLE_INC
4898 * Relocatable include entries are marked with a leading .../
4901 * 0: Remove that leading ".../"
4902 * 1: Remove trailing executable name (anything after the last '/')
4903 * from the perl path to give a perl prefix
4905 * While the @INC element starts "../" and the prefix ends with a real
4906 * directory (ie not . or ..) chop that real directory off the prefix
4907 * and the leading "../" from the @INC element. ie a logical "../"
4909 * Finally concatenate the prefix and the remainder of the @INC element
4910 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4911 * generates /usr/local/lib/perl5
4913 const char *libpath = SvPVX(libdir);
4914 STRLEN libpath_len = SvCUR(libdir);
4915 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4917 SV * const caret_X = get_sv("\030", 0);
4918 /* Going to use the SV just as a scratch buffer holding a C
4924 /* $^X is *the* source of taint if tainting is on, hence
4925 SvPOK() won't be true. */
4927 assert(SvPOKp(caret_X));
4928 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4929 /* Firstly take off the leading .../
4930 If all else fail we'll do the paths relative to the current
4932 sv_chop(libdir, libpath + 4);
4933 /* Don't use SvPV as we're intentionally bypassing taining,
4934 mortal copies that the mg_get of tainting creates, and
4935 corruption that seems to come via the save stack.
4936 I guess that the save stack isn't correctly set up yet. */
4937 libpath = SvPVX(libdir);
4938 libpath_len = SvCUR(libdir);
4940 /* This would work more efficiently with memrchr, but as it's
4941 only a GNU extension we'd need to probe for it and
4942 implement our own. Not hard, but maybe not worth it? */
4944 prefix = SvPVX(prefix_sv);
4945 lastslash = strrchr(prefix, '/');
4947 /* First time in with the *lastslash = '\0' we just wipe off
4948 the trailing /perl from (say) /usr/foo/bin/perl
4952 while ((*lastslash = '\0'), /* Do that, come what may. */
4953 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4954 && (lastslash = strrchr(prefix, '/')))) {
4955 if (lastslash[1] == '\0'
4956 || (lastslash[1] == '.'
4957 && (lastslash[2] == '/' /* ends "/." */
4958 || (lastslash[2] == '/'
4959 && lastslash[3] == '/' /* or "/.." */
4961 /* Prefix ends "/" or "/." or "/..", any of which
4962 are fishy, so don't do any more logical cleanup.
4966 /* Remove leading "../" from path */
4969 /* Next iteration round the loop removes the last
4970 directory name from prefix by writing a '\0' in
4971 the while clause. */
4973 /* prefix has been terminated with a '\0' to the correct
4974 length. libpath points somewhere into the libdir SV.
4975 We need to join the 2 with '/' and drop the result into
4977 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4978 SvREFCNT_dec(libdir);
4979 /* And this is the new libdir. */
4982 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4983 /* Need to taint reloccated paths if running set ID */
4984 SvTAINTED_on(libdir);
4987 SvREFCNT_dec(prefix_sv);
4992 * BEFORE pushing libdir onto @INC we may first push version- and
4993 * archname-specific sub-directories.
4995 if (addsubdirs || addoldvers) {
4996 #ifdef PERL_INC_VERSION_LIST
4997 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4998 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4999 const char * const *incver;
5005 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5007 while (unix[len-1] == '/') len--; /* Cosmetic */
5008 sv_usepvn(libdir,unix,len);
5011 PerlIO_printf(Perl_error_log,
5012 "Failed to unixify @INC element \"%s\"\n",
5016 #ifdef MACOS_TRADITIONAL
5017 #define PERL_AV_SUFFIX_FMT ""
5018 #define PERL_ARCH_FMT "%s:"
5019 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5021 #define PERL_AV_SUFFIX_FMT "/"
5022 #define PERL_ARCH_FMT "/%s"
5023 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5025 /* .../version/archname if -d .../version/archname */
5026 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5028 (int)PERL_REVISION, (int)PERL_VERSION,
5029 (int)PERL_SUBVERSION, ARCHNAME);
5030 subdir = S_incpush_if_exists(aTHX_ subdir);
5032 /* .../version if -d .../version */
5033 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5034 (int)PERL_REVISION, (int)PERL_VERSION,
5035 (int)PERL_SUBVERSION);
5036 subdir = S_incpush_if_exists(aTHX_ subdir);
5038 /* .../archname if -d .../archname */
5039 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5040 subdir = S_incpush_if_exists(aTHX_ subdir);
5044 #ifdef PERL_INC_VERSION_LIST
5046 for (incver = incverlist; *incver; incver++) {
5047 /* .../xxx if -d .../xxx */
5048 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5049 subdir = S_incpush_if_exists(aTHX_ subdir);
5055 /* finally push this lib directory on the end of @INC */
5056 av_push(GvAVn(PL_incgv), libdir);
5059 assert (SvREFCNT(subdir) == 1);
5060 SvREFCNT_dec(subdir);
5066 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5070 const line_t oldline = CopLINE(PL_curcop);
5076 while (av_len(paramList) >= 0) {
5077 cv = (CV*)av_shift(paramList);
5079 if (paramList == PL_beginav) {
5080 /* save PL_beginav for compiler */
5081 if (! PL_beginav_save)
5082 PL_beginav_save = newAV();
5083 av_push(PL_beginav_save, (SV*)cv);
5085 else if (paramList == PL_checkav) {
5086 /* save PL_checkav for compiler */
5087 if (! PL_checkav_save)
5088 PL_checkav_save = newAV();
5089 av_push(PL_checkav_save, (SV*)cv);
5099 (void)SvPV_const(atsv, len);
5101 PL_curcop = &PL_compiling;
5102 CopLINE_set(PL_curcop, oldline);
5103 if (paramList == PL_beginav)
5104 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5106 Perl_sv_catpvf(aTHX_ atsv,
5107 "%s failed--call queue aborted",
5108 paramList == PL_checkav ? "CHECK"
5109 : paramList == PL_initav ? "INIT"
5111 while (PL_scopestack_ix > oldscope)
5114 Perl_croak(aTHX_ "%"SVf"", atsv);
5121 /* my_exit() was called */
5122 while (PL_scopestack_ix > oldscope)
5125 PL_curstash = PL_defstash;
5126 PL_curcop = &PL_compiling;
5127 CopLINE_set(PL_curcop, oldline);
5129 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5130 if (paramList == PL_beginav)
5131 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5133 Perl_croak(aTHX_ "%s failed--call queue aborted",
5134 paramList == PL_checkav ? "CHECK"
5135 : paramList == PL_initav ? "INIT"
5142 PL_curcop = &PL_compiling;
5143 CopLINE_set(PL_curcop, oldline);
5146 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5155 S_call_list_body(pTHX_ CV *cv)
5158 PUSHMARK(PL_stack_sp);
5159 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5164 Perl_my_exit(pTHX_ U32 status)
5167 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5168 thr, (unsigned long) status));
5177 STATUS_EXIT_SET(status);
5184 Perl_my_failure_exit(pTHX)
5188 /* We have been called to fall on our sword. The desired exit code
5189 * should be already set in STATUS_UNIX, but could be shifted over
5190 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5193 * If an error code has not been set, then force the issue.
5195 if (MY_POSIX_EXIT) {
5197 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5198 * the exit code when there isn't an error.
5201 if (STATUS_UNIX == 0)
5202 STATUS_UNIX_EXIT_SET(255);
5204 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5206 /* The exit code could have been set by $? or vmsish which
5207 * means that it may not be fatal. So convert
5208 * success/warning codes to fatal.
5210 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5211 STATUS_UNIX_EXIT_SET(255);
5215 /* Traditionally Perl on VMS always expects a Fatal Error. */
5216 if (vaxc$errno & 1) {
5218 /* So force success status to failure */
5219 if (STATUS_NATIVE & 1)
5224 STATUS_UNIX = EINTR; /* In case something cares */
5229 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5231 /* Encode the severity code */
5232 severity = STATUS_NATIVE & STS$M_SEVERITY;
5233 STATUS_UNIX = (severity ? severity : 1) << 8;
5235 /* Perl expects this to be a fatal error */
5236 if (severity != STS$K_SEVERE)
5245 STATUS_UNIX_SET(errno);
5247 exitstatus = STATUS_UNIX >> 8;
5248 if (exitstatus & 255)
5249 STATUS_UNIX_SET(exitstatus);
5251 STATUS_UNIX_SET(255);
5258 S_my_exit_jump(pTHX)
5263 SvREFCNT_dec(PL_e_script);
5267 POPSTACK_TO(PL_mainstack);
5275 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5278 const char * const p = SvPVX_const(PL_e_script);
5279 const char *nl = strchr(p, '\n');
5281 PERL_UNUSED_ARG(idx);
5282 PERL_UNUSED_ARG(maxlen);
5284 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5286 filter_del(read_e_script);
5289 sv_catpvn(buf_sv, p, nl-p);
5290 sv_chop(PL_e_script, nl);
5296 * c-indentation-style: bsd
5298 * indent-tabs-mode: t
5301 * ex: set ts=8 sts=4 sw=4 noet: