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
1292 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1293 thread at thread exit. */
1294 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1295 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1298 #if defined(WIN32) || defined(NETWARE)
1299 # if defined(PERL_IMPLICIT_SYS)
1302 void *host = nw_internal_host;
1304 void *host = w32_internal_host;
1306 PerlMem_free(aTHXx);
1308 nw_delete_internal_host(host);
1310 win32_delete_internal_host(host);
1314 PerlMem_free(aTHXx);
1317 PerlMem_free(aTHXx);
1321 #if defined(USE_ITHREADS)
1322 /* provide destructors to clean up the thread key when libperl is unloaded */
1323 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1325 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1326 #pragma fini "perl_fini"
1330 #if defined(__GNUC__)
1331 __attribute__((destructor))
1341 #endif /* THREADS */
1344 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1347 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1348 PL_exitlist[PL_exitlistlen].fn = fn;
1349 PL_exitlist[PL_exitlistlen].ptr = ptr;
1353 #ifdef HAS_PROCSELFEXE
1354 /* This is a function so that we don't hold on to MAXPATHLEN
1355 bytes of stack longer than necessary
1358 S_procself_val(pTHX_ SV *sv, const char *arg0)
1360 char buf[MAXPATHLEN];
1361 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1363 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1364 includes a spurious NUL which will cause $^X to fail in system
1365 or backticks (this will prevent extensions from being built and
1366 many tests from working). readlink is not meant to add a NUL.
1367 Normal readlink works fine.
1369 if (len > 0 && buf[len-1] == '\0') {
1373 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1374 returning the text "unknown" from the readlink rather than the path
1375 to the executable (or returning an error from the readlink). Any valid
1376 path has a '/' in it somewhere, so use that to validate the result.
1377 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1379 if (len > 0 && memchr(buf, '/', len)) {
1380 sv_setpvn(sv,buf,len);
1386 #endif /* HAS_PROCSELFEXE */
1389 S_set_caret_X(pTHX) {
1391 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1393 #ifdef HAS_PROCSELFEXE
1394 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1397 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1399 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1406 =for apidoc perl_parse
1408 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1414 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1421 PERL_UNUSED_VAR(my_perl);
1423 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1426 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1427 setuid perl scripts securely.\n");
1428 #endif /* IAMSUID */
1431 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1432 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1433 * This MUST be done before any hash stores or fetches take place.
1434 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1435 * yourself, it is your responsibility to provide a good random seed!
1436 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1437 if (!PL_rehash_seed_set)
1438 PL_rehash_seed = get_hash_seed();
1440 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1442 if (s && (atoi(s) == 1))
1443 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1445 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1450 if (PL_origalen != 0) {
1451 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1454 /* Set PL_origalen be the sum of the contiguous argv[]
1455 * elements plus the size of the env in case that it is
1456 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1457 * as the maximum modifiable length of $0. In the worst case
1458 * the area we are able to modify is limited to the size of
1459 * the original argv[0]. (See below for 'contiguous', though.)
1461 const char *s = NULL;
1464 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1465 /* Do the mask check only if the args seem like aligned. */
1467 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1469 /* See if all the arguments are contiguous in memory. Note
1470 * that 'contiguous' is a loose term because some platforms
1471 * align the argv[] and the envp[]. If the arguments look
1472 * like non-aligned, assume that they are 'strictly' or
1473 * 'traditionally' contiguous. If the arguments look like
1474 * aligned, we just check that they are within aligned
1475 * PTRSIZE bytes. As long as no system has something bizarre
1476 * like the argv[] interleaved with some other data, we are
1477 * fine. (Did I just evoke Murphy's Law?) --jhi */
1478 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1480 for (i = 1; i < PL_origargc; i++) {
1481 if ((PL_origargv[i] == s + 1
1483 || PL_origargv[i] == s + 2
1488 (PL_origargv[i] > s &&
1490 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1500 /* Can we grab env area too to be used as the area for $0? */
1501 if (s && PL_origenviron) {
1502 if ((PL_origenviron[0] == s + 1
1504 || (PL_origenviron[0] == s + 9 && (s += 8))
1509 (PL_origenviron[0] > s &&
1510 PL_origenviron[0] <=
1511 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1515 s = PL_origenviron[0];
1518 my_setenv("NoNe SuCh", NULL);
1519 /* Force copy of environment. */
1520 for (i = 1; PL_origenviron[i]; i++) {
1521 if (PL_origenviron[i] == s + 1
1524 (PL_origenviron[i] > s &&
1525 PL_origenviron[i] <=
1526 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1529 s = PL_origenviron[i];
1537 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1542 /* Come here if running an undumped a.out. */
1544 PL_origfilename = savepv(argv[0]);
1545 PL_do_undump = FALSE;
1546 cxstack_ix = -1; /* start label stack again */
1548 assert (!PL_tainted);
1550 S_set_caret_X(aTHX);
1552 init_postdump_symbols(argc,argv,env);
1557 op_free(PL_main_root);
1558 PL_main_root = NULL;
1560 PL_main_start = NULL;
1561 SvREFCNT_dec(PL_main_cv);
1565 oldscope = PL_scopestack_ix;
1566 PL_dowarn = G_WARN_OFF;
1571 parse_body(env,xsinit);
1573 call_list(oldscope, PL_checkav);
1580 /* my_exit() was called */
1581 while (PL_scopestack_ix > oldscope)
1584 PL_curstash = PL_defstash;
1586 call_list(oldscope, PL_checkav);
1590 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1599 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1602 int argc = PL_origargc;
1603 char **argv = PL_origargv;
1604 const char *scriptname = NULL;
1605 VOL bool dosearch = FALSE;
1606 const char *validarg = "";
1609 const char *cddir = NULL;
1610 #ifdef USE_SITECUSTOMIZE
1611 bool minus_f = FALSE;
1614 sv_setpvn(PL_linestr,"",0);
1615 sv = newSVpvs(""); /* first used for -I flags */
1619 for (argc--,argv++; argc > 0; argc--,argv++) {
1620 if (argv[0][0] != '-' || !argv[0][1])
1624 validarg = " PHOOEY ";
1628 * Can we rely on the kernel to start scripts with argv[1] set to
1629 * contain all #! line switches (the whole line)? (argv[0] is set to
1630 * the interpreter name, argv[2] to the script name; argv[3] and
1631 * above may contain other arguments.)
1638 #ifndef PERL_STRICT_CR
1663 if ((s = moreswitches(s)))
1668 CHECK_MALLOC_TOO_LATE_FOR('t');
1669 if( !PL_tainting ) {
1670 PL_taint_warn = TRUE;
1676 CHECK_MALLOC_TOO_LATE_FOR('T');
1678 PL_taint_warn = FALSE;
1686 #ifdef MACOS_TRADITIONAL
1687 /* ignore -e for Dev:Pseudo argument */
1688 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1691 forbid_setid('e', -1);
1693 PL_e_script = newSVpvs("");
1694 filter_add(read_e_script, NULL);
1697 sv_catpv(PL_e_script, s);
1699 sv_catpv(PL_e_script, argv[1]);
1703 Perl_croak(aTHX_ "No code specified for -%c", *s);
1704 sv_catpvs(PL_e_script, "\n");
1708 #ifdef USE_SITECUSTOMIZE
1714 case 'I': /* -I handled both here and in moreswitches() */
1715 forbid_setid('I', -1);
1716 if (!*++s && (s=argv[1]) != NULL) {
1720 STRLEN len = strlen(s);
1721 const char * const p = savepvn(s, len);
1722 incpush(p, TRUE, TRUE, FALSE, FALSE);
1723 sv_catpvs(sv, "-I");
1724 sv_catpvn(sv, p, len);
1729 Perl_croak(aTHX_ "No directory specified for -I");
1732 forbid_setid('P', -1);
1733 PL_preprocess = TRUE;
1737 forbid_setid('S', -1);
1746 PL_preambleav = newAV();
1747 av_push(PL_preambleav,
1748 newSVpvs("use Config;"));
1752 opts_prog = newSVpvs("print Config::myconfig(),");
1754 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1756 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1758 opts = SvCUR(opts_prog);
1760 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1764 # ifdef DEBUG_LEAKING_SCALARS
1765 " DEBUG_LEAKING_SCALARS"
1767 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1768 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1770 # ifdef FAKE_THREADS
1773 # ifdef MULTIPLICITY
1782 # ifdef PERL_DONT_CREATE_GVSV
1783 " PERL_DONT_CREATE_GVSV"
1785 # ifdef PERL_GLOBAL_STRUCT
1786 " PERL_GLOBAL_STRUCT"
1788 # ifdef PERL_IMPLICIT_CONTEXT
1789 " PERL_IMPLICIT_CONTEXT"
1791 # ifdef PERL_IMPLICIT_SYS
1792 " PERL_IMPLICIT_SYS"
1794 # ifdef PERL_MALLOC_WRAP
1797 # ifdef PERL_NEED_APPCTX
1800 # ifdef PERL_NEED_TIMESBASE
1801 " PERL_NEED_TIMESBASE"
1803 # ifdef PERL_OLD_COPY_ON_WRITE
1804 " PERL_OLD_COPY_ON_WRITE"
1806 # ifdef PERL_TRACK_MEMPOOL
1807 " PERL_TRACK_MEMPOOL"
1809 # ifdef PERL_USE_SAFE_PUTENV
1810 " PERL_USE_SAFE_PUTENV"
1812 #ifdef PERL_USES_PL_PIDSTATUS
1813 " PERL_USES_PL_PIDSTATUS"
1815 # ifdef PL_OP_SLAB_ALLOC
1818 # ifdef THREADS_HAVE_PIDS
1819 " THREADS_HAVE_PIDS"
1821 # ifdef USE_64_BIT_ALL
1824 # ifdef USE_64_BIT_INT
1827 # ifdef USE_ITHREADS
1830 # ifdef USE_LARGE_FILES
1833 # ifdef USE_LONG_DOUBLE
1839 # ifdef USE_REENTRANT_API
1840 " USE_REENTRANT_API"
1845 # ifdef USE_SITECUSTOMIZE
1846 " USE_SITECUSTOMIZE"
1853 while (SvCUR(opts_prog) > opts+76) {
1854 /* find last space after "options: " and before col 76
1858 char * const pv = SvPV_nolen(opts_prog);
1859 const char c = pv[opts+76];
1861 space = strrchr(pv+opts+26, ' ');
1863 if (!space) break; /* "Can't happen" */
1865 /* break the line before that space */
1868 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1869 STR_WITH_LEN("\\n "));
1872 sv_catpvs(opts_prog,"\\n\",");
1874 #if defined(LOCAL_PATCH_COUNT)
1875 if (LOCAL_PATCH_COUNT > 0) {
1877 sv_catpvs(opts_prog,
1878 "\" Locally applied patches:\\n\",");
1879 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1880 if (PL_localpatches[i])
1881 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1882 0, PL_localpatches[i], 0);
1886 Perl_sv_catpvf(aTHX_ opts_prog,
1887 "\" Built under %s\\n\"",OSNAME);
1890 Perl_sv_catpvf(aTHX_ opts_prog,
1891 ",\" Compiled at %s %s\\n\"",__DATE__,
1894 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1898 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1899 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1900 "sort grep {/^PERL/} keys %ENV; ");
1902 sv_catpvs(opts_prog,
1903 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1905 sv_catpvs(opts_prog,
1906 "print \" \\%ENV:\\n @env\\n\" if @env;"
1907 "print \" \\@INC:\\n @INC\\n\";");
1911 opts_prog = Perl_newSVpvf(aTHX_
1912 "Config::config_vars(qw%c%s%c)",
1916 av_push(PL_preambleav, opts_prog);
1917 /* don't look for script or read stdin */
1918 scriptname = BIT_BUCKET;
1922 PL_doextract = TRUE;
1930 if (!*++s || isSPACE(*s)) {
1934 /* catch use of gnu style long options */
1935 if (strEQ(s, "version")) {
1939 if (strEQ(s, "help")) {
1946 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1952 #ifndef SECURE_INTERNAL_GETENV
1955 (s = PerlEnv_getenv("PERL5OPT")))
1957 const char *popt = s;
1960 if (*s == '-' && *(s+1) == 'T') {
1961 CHECK_MALLOC_TOO_LATE_FOR('T');
1963 PL_taint_warn = FALSE;
1966 char *popt_copy = NULL;
1979 if (!strchr("CDIMUdmtwA", *s))
1980 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1984 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1985 s = popt_copy + (s - popt);
1986 d = popt_copy + (d - popt);
1993 if( !PL_tainting ) {
1994 PL_taint_warn = TRUE;
2004 #ifdef USE_SITECUSTOMIZE
2007 PL_preambleav = newAV();
2008 av_unshift(PL_preambleav, 1);
2009 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2013 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2014 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2018 scriptname = argv[0];
2021 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2023 else if (scriptname == NULL) {
2025 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2031 /* Set $^X early so that it can be used for relocatable paths in @INC */
2032 assert (!PL_tainted);
2034 S_set_caret_X(aTHX);
2041 = open_script(scriptname, dosearch, sv, &suidscript);
2043 validate_suid(validarg, scriptname, fdscript, suidscript);
2046 # if defined(SIGCHLD) || defined(SIGCLD)
2049 # define SIGCHLD SIGCLD
2051 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2052 if (sigstate == (Sighandler_t) SIG_IGN) {
2053 if (ckWARN(WARN_SIGNAL))
2054 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2055 "Can't ignore signal CHLD, forcing to default");
2056 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2063 #ifdef MACOS_TRADITIONAL
2064 || gMacPerl_AlwaysExtract
2068 /* This will croak if suidscript is >= 0, as -x cannot be used with
2070 forbid_setid('x', suidscript);
2071 /* Hence you can't get here if suidscript >= 0 */
2074 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2075 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2079 PL_main_cv = PL_compcv = (CV*)newSV(0);
2080 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2081 CvUNIQUE_on(PL_compcv);
2083 CvPADLIST(PL_compcv) = pad_new(0);
2086 boot_core_UNIVERSAL();
2087 boot_core_xsutils();
2090 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2092 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2098 # ifdef HAS_SOCKS5_INIT
2099 socks5_init(argv[0]);
2105 init_predump_symbols();
2106 /* init_postdump_symbols not currently designed to be called */
2107 /* more than once (ENV isn't cleared first, for example) */
2108 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2110 init_postdump_symbols(argc,argv,env);
2112 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2113 * or explicitly in some platforms.
2114 * locale.c:Perl_init_i18nl10n() if the environment
2115 * look like the user wants to use UTF-8. */
2116 #if defined(__SYMBIAN32__)
2117 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2120 /* Requires init_predump_symbols(). */
2121 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2126 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2127 * and the default open disciplines. */
2128 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2129 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2131 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2132 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2133 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2135 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2136 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2137 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2139 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2140 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2141 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2143 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2144 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2147 sv_setpvn(sv, ":utf8\0:utf8", 11);
2149 sv_setpvn(sv, ":utf8\0", 6);
2152 sv_setpvn(sv, "\0:utf8", 6);
2158 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2159 if (strEQ(s, "unsafe"))
2160 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2161 else if (strEQ(s, "safe"))
2162 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2164 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2169 /* now parse the script */
2171 SETERRNO(0,SS_NORMAL);
2173 #ifdef MACOS_TRADITIONAL
2174 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2176 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2178 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2179 MacPerl_MPWFileName(PL_origfilename));
2183 if (yyparse() || PL_error_count) {
2185 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2187 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2192 CopLINE_set(PL_curcop, 0);
2193 PL_curstash = PL_defstash;
2194 PL_preprocess = FALSE;
2196 SvREFCNT_dec(PL_e_script);
2204 SAVECOPFILE(PL_curcop);
2205 SAVECOPLINE(PL_curcop);
2206 gv_check(PL_defstash);
2213 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2214 dump_mstats("after compilation:");
2223 =for apidoc perl_run
2225 Tells a Perl interpreter to run. See L<perlembed>.
2238 PERL_UNUSED_CONTEXT;
2240 oldscope = PL_scopestack_ix;
2248 cxstack_ix = -1; /* start context stack again */
2250 case 0: /* normal completion */
2254 case 2: /* my_exit() */
2255 while (PL_scopestack_ix > oldscope)
2258 PL_curstash = PL_defstash;
2259 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2260 PL_endav && !PL_minus_c)
2261 call_list(oldscope, PL_endav);
2263 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2264 dump_mstats("after execution: ");
2270 POPSTACK_TO(PL_mainstack);
2273 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2285 S_run_body(pTHX_ I32 oldscope)
2288 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2289 PL_sawampersand ? "Enabling" : "Omitting"));
2291 if (!PL_restartop) {
2292 DEBUG_x(dump_all());
2295 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2297 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2301 #ifdef MACOS_TRADITIONAL
2302 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2303 (gMacPerl_ErrorFormat ? "# " : ""),
2304 MacPerl_MPWFileName(PL_origfilename));
2306 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2310 if (PERLDB_SINGLE && PL_DBsingle)
2311 sv_setiv(PL_DBsingle, 1);
2313 call_list(oldscope, PL_initav);
2319 PL_op = PL_restartop;
2323 else if (PL_main_start) {
2324 CvDEPTH(PL_main_cv) = 1;
2325 PL_op = PL_main_start;
2333 =head1 SV Manipulation Functions
2335 =for apidoc p||get_sv
2337 Returns the SV of the specified Perl scalar. If C<create> is set and the
2338 Perl variable does not exist then it will be created. If C<create> is not
2339 set and the variable does not exist then NULL is returned.
2345 Perl_get_sv(pTHX_ const char *name, I32 create)
2348 gv = gv_fetchpv(name, create, SVt_PV);
2355 =head1 Array Manipulation Functions
2357 =for apidoc p||get_av
2359 Returns the AV of the specified Perl array. If C<create> is set and the
2360 Perl variable does not exist then it will be created. If C<create> is not
2361 set and the variable does not exist then NULL is returned.
2367 Perl_get_av(pTHX_ const char *name, I32 create)
2369 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2378 =head1 Hash Manipulation Functions
2380 =for apidoc p||get_hv
2382 Returns the HV of the specified Perl hash. If C<create> is set and the
2383 Perl variable does not exist then it will be created. If C<create> is not
2384 set and the variable does not exist then NULL is returned.
2390 Perl_get_hv(pTHX_ const char *name, I32 create)
2392 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2401 =head1 CV Manipulation Functions
2403 =for apidoc p||get_cv
2405 Returns the CV of the specified Perl subroutine. If C<create> is set and
2406 the Perl subroutine does not exist then it will be declared (which has the
2407 same effect as saying C<sub name;>). If C<create> is not set and the
2408 subroutine does not exist then NULL is returned.
2414 Perl_get_cv(pTHX_ const char *name, I32 create)
2416 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2417 /* XXX unsafe for threads if eval_owner isn't held */
2418 /* XXX this is probably not what they think they're getting.
2419 * It has the same effect as "sub name;", i.e. just a forward
2421 if (create && !GvCVu(gv))
2422 return newSUB(start_subparse(FALSE, 0),
2423 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2430 /* Be sure to refetch the stack pointer after calling these routines. */
2434 =head1 Callback Functions
2436 =for apidoc p||call_argv
2438 Performs a callback to the specified Perl sub. See L<perlcall>.
2444 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2446 /* See G_* flags in cop.h */
2447 /* null terminated arg list */
2455 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2460 return call_pv(sub_name, flags);
2464 =for apidoc p||call_pv
2466 Performs a callback to the specified Perl sub. See L<perlcall>.
2472 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2473 /* name of the subroutine */
2474 /* See G_* flags in cop.h */
2476 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2480 =for apidoc p||call_method
2482 Performs a callback to the specified Perl method. The blessed object must
2483 be on the stack. See L<perlcall>.
2489 Perl_call_method(pTHX_ const char *methname, I32 flags)
2490 /* name of the subroutine */
2491 /* See G_* flags in cop.h */
2493 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2496 /* May be called with any of a CV, a GV, or an SV containing the name. */
2498 =for apidoc p||call_sv
2500 Performs a callback to the Perl sub whose name is in the SV. See
2507 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2508 /* See G_* flags in cop.h */
2511 LOGOP myop; /* fake syntax tree node */
2514 volatile I32 retval = 0;
2516 bool oldcatch = CATCH_GET;
2518 OP* const oldop = PL_op;
2521 if (flags & G_DISCARD) {
2526 Zero(&myop, 1, LOGOP);
2527 myop.op_next = NULL;
2528 if (!(flags & G_NOARGS))
2529 myop.op_flags |= OPf_STACKED;
2530 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2531 (flags & G_ARRAY) ? OPf_WANT_LIST :
2536 EXTEND(PL_stack_sp, 1);
2537 *++PL_stack_sp = sv;
2539 oldscope = PL_scopestack_ix;
2541 if (PERLDB_SUB && PL_curstash != PL_debstash
2542 /* Handle first BEGIN of -d. */
2543 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2544 /* Try harder, since this may have been a sighandler, thus
2545 * curstash may be meaningless. */
2546 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2547 && !(flags & G_NODEBUG))
2548 PL_op->op_private |= OPpENTERSUB_DB;
2550 if (flags & G_METHOD) {
2551 Zero(&method_op, 1, UNOP);
2552 method_op.op_next = PL_op;
2553 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2554 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2555 PL_op = (OP*)&method_op;
2558 if (!(flags & G_EVAL)) {
2560 call_body((OP*)&myop, FALSE);
2561 retval = PL_stack_sp - (PL_stack_base + oldmark);
2562 CATCH_SET(oldcatch);
2565 myop.op_other = (OP*)&myop;
2567 /* we're trying to emulate pp_entertry() here */
2569 register PERL_CONTEXT *cx;
2570 const I32 gimme = GIMME_V;
2575 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2577 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2579 PL_in_eval = EVAL_INEVAL;
2580 if (flags & G_KEEPERR)
2581 PL_in_eval |= EVAL_KEEPERR;
2583 sv_setpvn(ERRSV,"",0);
2591 call_body((OP*)&myop, FALSE);
2592 retval = PL_stack_sp - (PL_stack_base + oldmark);
2593 if (!(flags & G_KEEPERR))
2594 sv_setpvn(ERRSV,"",0);
2600 /* my_exit() was called */
2601 PL_curstash = PL_defstash;
2604 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2605 Perl_croak(aTHX_ "Callback called exit");
2610 PL_op = PL_restartop;
2614 PL_stack_sp = PL_stack_base + oldmark;
2615 if (flags & G_ARRAY)
2619 *++PL_stack_sp = &PL_sv_undef;
2624 if (PL_scopestack_ix > oldscope) {
2628 register PERL_CONTEXT *cx;
2635 PERL_UNUSED_VAR(newsp);
2636 PERL_UNUSED_VAR(gimme);
2637 PERL_UNUSED_VAR(optype);
2642 if (flags & G_DISCARD) {
2643 PL_stack_sp = PL_stack_base + oldmark;
2653 S_call_body(pTHX_ const OP *myop, bool is_eval)
2656 if (PL_op == myop) {
2658 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2660 PL_op = Perl_pp_entersub(aTHX); /* this does */
2666 /* Eval a string. The G_EVAL flag is always assumed. */
2669 =for apidoc p||eval_sv
2671 Tells Perl to C<eval> the string in the SV.
2677 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2679 /* See G_* flags in cop.h */
2683 UNOP myop; /* fake syntax tree node */
2684 volatile I32 oldmark = SP - PL_stack_base;
2685 volatile I32 retval = 0;
2687 OP* const oldop = PL_op;
2690 if (flags & G_DISCARD) {
2697 Zero(PL_op, 1, UNOP);
2698 EXTEND(PL_stack_sp, 1);
2699 *++PL_stack_sp = sv;
2701 if (!(flags & G_NOARGS))
2702 myop.op_flags = OPf_STACKED;
2703 myop.op_next = NULL;
2704 myop.op_type = OP_ENTEREVAL;
2705 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2706 (flags & G_ARRAY) ? OPf_WANT_LIST :
2708 if (flags & G_KEEPERR)
2709 myop.op_flags |= OPf_SPECIAL;
2711 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2712 * before a PUSHEVAL, which corrupts the stack after a croak */
2713 TAINT_PROPER("eval_sv()");
2719 call_body((OP*)&myop,TRUE);
2720 retval = PL_stack_sp - (PL_stack_base + oldmark);
2721 if (!(flags & G_KEEPERR))
2722 sv_setpvn(ERRSV,"",0);
2728 /* my_exit() was called */
2729 PL_curstash = PL_defstash;
2732 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2733 Perl_croak(aTHX_ "Callback called exit");
2738 PL_op = PL_restartop;
2742 PL_stack_sp = PL_stack_base + oldmark;
2743 if (flags & G_ARRAY)
2747 *++PL_stack_sp = &PL_sv_undef;
2753 if (flags & G_DISCARD) {
2754 PL_stack_sp = PL_stack_base + oldmark;
2764 =for apidoc p||eval_pv
2766 Tells Perl to C<eval> the given string and return an SV* result.
2772 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2776 SV* sv = newSVpv(p, 0);
2778 eval_sv(sv, G_SCALAR);
2785 if (croak_on_error && SvTRUE(ERRSV)) {
2786 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2792 /* Require a module. */
2795 =head1 Embedding Functions
2797 =for apidoc p||require_pv
2799 Tells Perl to C<require> the file named by the string argument. It is
2800 analogous to the Perl code C<eval "require '$file'">. It's even
2801 implemented that way; consider using load_module instead.
2806 Perl_require_pv(pTHX_ const char *pv)
2811 PUSHSTACKi(PERLSI_REQUIRE);
2813 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2814 eval_sv(sv_2mortal(sv), G_DISCARD);
2820 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2822 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2825 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2829 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2831 /* This message really ought to be max 23 lines.
2832 * Removed -h because the user already knows that option. Others? */
2834 static const char * const usage_msg[] = {
2835 "-0[octal] specify record separator (\\0, if no argument)",
2836 "-A[mod][=pattern] activate all/given assertions",
2837 "-a autosplit mode with -n or -p (splits $_ into @F)",
2838 "-C[number/list] enables the listed Unicode features",
2839 "-c check syntax only (runs BEGIN and CHECK blocks)",
2840 "-d[:debugger] run program under debugger",
2841 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2842 "-e program one line of program (several -e's allowed, omit programfile)",
2843 "-E program like -e, but enables all optional features",
2844 "-f don't do $sitelib/sitecustomize.pl at startup",
2845 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2846 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2847 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2848 "-l[octal] enable line ending processing, specifies line terminator",
2849 "-[mM][-]module execute \"use/no module...\" before executing program",
2850 "-n assume \"while (<>) { ... }\" loop around program",
2851 "-p assume loop like -n but print line also, like sed",
2852 "-P run program through C preprocessor before compilation",
2853 "-s enable rudimentary parsing for switches after programfile",
2854 "-S look for programfile using PATH environment variable",
2855 "-t enable tainting warnings",
2856 "-T enable tainting checks",
2857 "-u dump core after parsing program",
2858 "-U allow unsafe operations",
2859 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2860 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2861 "-w enable many useful warnings (RECOMMENDED)",
2862 "-W enable all warnings",
2863 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2864 "-X disable all warnings",
2868 const char * const *p = usage_msg;
2870 PerlIO_printf(PerlIO_stdout(),
2871 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2874 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2877 /* convert a string of -D options (or digits) into an int.
2878 * sets *s to point to the char after the options */
2882 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2884 static const char * const usage_msgd[] = {
2885 " Debugging flag values: (see also -d)",
2886 " p Tokenizing and parsing (with v, displays parse stack)",
2887 " s Stack snapshots (with v, displays all stacks)",
2888 " l Context (loop) stack processing",
2889 " t Trace execution",
2890 " o Method and overloading resolution",
2891 " c String/numeric conversions",
2892 " P Print profiling info, preprocessor command for -P, source file input state",
2893 " m Memory allocation",
2894 " f Format processing",
2895 " r Regular expression parsing and execution",
2896 " x Syntax tree dump",
2897 " u Tainting checks",
2898 " H Hash dump -- usurps values()",
2899 " X Scratchpad allocation",
2901 " S Thread synchronization",
2903 " R Include reference counts of dumped variables (eg when using -Ds)",
2904 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2905 " v Verbose: use in conjunction with other flags",
2907 " A Consistency checks on internal structures",
2908 " q quiet - currently only suppresses the 'EXECUTING' message",
2913 /* if adding extra options, remember to update DEBUG_MASK */
2914 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2916 for (; isALNUM(**s); (*s)++) {
2917 const char * const d = strchr(debopts,**s);
2919 i |= 1 << (d - debopts);
2920 else if (ckWARN_d(WARN_DEBUGGING))
2921 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2922 "invalid option -D%c, use -D'' to see choices\n", **s);
2925 else if (isDIGIT(**s)) {
2927 for (; isALNUM(**s); (*s)++) ;
2929 else if (givehelp) {
2930 const char *const *p = usage_msgd;
2931 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2934 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2935 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2936 "-Dp not implemented on this platform\n");
2942 /* This routine handles any switches that can be given during run */
2945 Perl_moreswitches(pTHX_ char *s)
2956 SvREFCNT_dec(PL_rs);
2957 if (s[1] == 'x' && s[2]) {
2958 const char *e = s+=2;
2964 flags = PERL_SCAN_SILENT_ILLDIGIT;
2965 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2966 if (s + numlen < e) {
2967 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2971 PL_rs = newSVpvs("");
2972 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2973 tmps = (U8*)SvPVX(PL_rs);
2974 uvchr_to_utf8(tmps, rschar);
2975 SvCUR_set(PL_rs, UNISKIP(rschar));
2980 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2981 if (rschar & ~((U8)~0))
2982 PL_rs = &PL_sv_undef;
2983 else if (!rschar && numlen >= 2)
2984 PL_rs = newSVpvs("");
2986 char ch = (char)rschar;
2987 PL_rs = newSVpvn(&ch, 1);
2990 sv_setsv(get_sv("/", TRUE), PL_rs);
2995 PL_unicode = parse_unicode_opts( (const char **)&s );
3000 while (*s && !isSPACE(*s)) ++s;
3002 PL_splitstr = savepv(PL_splitstr);
3013 forbid_setid('d', -1);
3016 /* -dt indicates to the debugger that threads will be used */
3017 if (*s == 't' && !isALNUM(s[1])) {
3019 my_setenv("PERL5DB_THREADED", "1");
3022 /* The following permits -d:Mod to accepts arguments following an =
3023 in the fashion that -MSome::Mod does. */
3024 if (*s == ':' || *s == '=') {
3026 SV * const sv = newSVpvs("use Devel::");
3028 /* We now allow -d:Module=Foo,Bar */
3029 while(isALNUM(*s) || *s==':') ++s;
3031 sv_catpv(sv, start);
3033 sv_catpvn(sv, start, s-start);
3034 /* Don't use NUL as q// delimiter here, this string goes in the
3036 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3039 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3042 PL_perldb = PERLDB_ALL;
3049 forbid_setid('D', -1);
3051 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3052 #else /* !DEBUGGING */
3053 if (ckWARN_d(WARN_DEBUGGING))
3054 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3055 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3056 for (s++; isALNUM(*s); s++) ;
3061 usage(PL_origargv[0]);
3064 Safefree(PL_inplace);
3065 #if defined(__CYGWIN__) /* do backup extension automagically */
3066 if (*(s+1) == '\0') {
3067 PL_inplace = savepvs(".bak");
3070 #endif /* __CYGWIN__ */
3071 PL_inplace = savepv(s+1);
3072 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3076 if (*s == '-') /* Additional switches on #! line. */
3080 case 'I': /* -I handled both here and in parse_body() */
3081 forbid_setid('I', -1);
3083 while (*s && isSPACE(*s))
3088 /* ignore trailing spaces (possibly followed by other switches) */
3090 for (e = p; *e && !isSPACE(*e); e++) ;
3094 } while (*p && *p != '-');
3095 e = savepvn(s, e-s);
3096 incpush(e, TRUE, TRUE, FALSE, FALSE);
3103 Perl_croak(aTHX_ "No directory specified for -I");
3109 SvREFCNT_dec(PL_ors_sv);
3115 PL_ors_sv = newSVpvs("\n");
3116 numlen = 3 + (*s == '0');
3117 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3121 if (RsPARA(PL_rs)) {
3122 PL_ors_sv = newSVpvs("\n\n");
3125 PL_ors_sv = newSVsv(PL_rs);
3130 forbid_setid('A', -1);
3132 PL_preambleav = newAV();
3135 char * const start = s;
3136 SV * const sv = newSVpvs("use assertions::activate");
3137 while(isALNUM(*s) || *s == ':') ++s;
3139 sv_catpvs(sv, "::");
3140 sv_catpvn(sv, start, s-start);
3143 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3146 else if (*s != '\0') {
3147 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3149 av_push(PL_preambleav, sv);
3153 forbid_setid('M', -1); /* XXX ? */
3156 forbid_setid('m', -1); /* XXX ? */
3160 const char *use = "use ";
3161 /* -M-foo == 'no foo' */
3162 /* Leading space on " no " is deliberate, to make both
3163 possibilities the same length. */
3164 if (*s == '-') { use = " no "; ++s; }
3165 sv = newSVpvn(use,4);
3167 /* We allow -M'Module qw(Foo Bar)' */
3168 while(isALNUM(*s) || *s==':') ++s;
3170 sv_catpv(sv, start);
3171 if (*(start-1) == 'm') {
3173 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3174 sv_catpvs( sv, " ()");
3178 Perl_croak(aTHX_ "Module name required with -%c option",
3180 sv_catpvn(sv, start, s-start);
3181 sv_catpvs(sv, " split(/,/,q");
3182 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3184 sv_catpvs(sv, "\0)");
3188 PL_preambleav = newAV();
3189 av_push(PL_preambleav, sv);
3192 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3203 forbid_setid('s', -1);
3204 PL_doswitches = TRUE;
3218 #ifdef MACOS_TRADITIONAL
3219 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3221 PL_do_undump = TRUE;
3229 if (!sv_derived_from(PL_patchlevel, "version"))
3230 upg_version(PL_patchlevel);
3232 PerlIO_printf(PerlIO_stdout(),
3233 Perl_form(aTHX_ "\nThis is perl, %"SVf
3234 #ifdef PERL_PATCHNUM
3235 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3238 vstringify(PL_patchlevel),
3241 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3242 PerlIO_printf(PerlIO_stdout(),
3243 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3244 vstringify(PL_patchlevel)));
3245 PerlIO_printf(PerlIO_stdout(),
3246 Perl_form(aTHX_ " built under %s at %s %s\n",
3247 OSNAME, __DATE__, __TIME__));
3248 PerlIO_printf(PerlIO_stdout(),
3249 Perl_form(aTHX_ " OS Specific Release: %s\n",
3253 #if defined(LOCAL_PATCH_COUNT)
3254 if (LOCAL_PATCH_COUNT > 0)
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\n(with %d registered patch%s, "
3257 "see perl -V for more detail)",
3258 (int)LOCAL_PATCH_COUNT,
3259 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "\n\nCopyright 1987-2006, Larry Wall\n");
3264 #ifdef MACOS_TRADITIONAL
3265 PerlIO_printf(PerlIO_stdout(),
3266 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3267 "maintained by Chris Nandor\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3274 PerlIO_printf(PerlIO_stdout(),
3275 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3276 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3281 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "atariST series port, ++jrb bammi@cadence.com\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3308 PerlIO_printf(PerlIO_stdout(),
3309 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3312 PerlIO_printf(PerlIO_stdout(),
3313 "MiNT port by Guido Flohr, 1997-1999\n");
3316 PerlIO_printf(PerlIO_stdout(),
3317 "EPOC port by Olaf Flebbe, 1999-2002\n");
3320 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3321 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3324 #ifdef __SYMBIAN32__
3325 PerlIO_printf(PerlIO_stdout(),
3326 "Symbian port by Nokia, 2004-2005\n");
3328 #ifdef BINARY_BUILD_NOTICE
3329 BINARY_BUILD_NOTICE;
3331 PerlIO_printf(PerlIO_stdout(),
3333 Perl may be copied only under the terms of either the Artistic License or the\n\
3334 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3335 Complete documentation for Perl, including FAQ lists, should be found on\n\
3336 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3337 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3340 if (! (PL_dowarn & G_WARN_ALL_MASK))
3341 PL_dowarn |= G_WARN_ON;
3345 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3346 if (!specialWARN(PL_compiling.cop_warnings))
3347 SvREFCNT_dec(PL_compiling.cop_warnings);
3348 PL_compiling.cop_warnings = pWARN_ALL ;
3352 PL_dowarn = G_WARN_ALL_OFF;
3353 if (!specialWARN(PL_compiling.cop_warnings))
3354 SvREFCNT_dec(PL_compiling.cop_warnings);
3355 PL_compiling.cop_warnings = pWARN_NONE ;
3360 if (s[1] == '-') /* Additional switches on #! line. */
3365 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3371 #ifdef ALTERNATE_SHEBANG
3372 case 'S': /* OS/2 needs -S on "extproc" line. */
3380 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3385 /* compliments of Tom Christiansen */
3387 /* unexec() can be found in the Gnu emacs distribution */
3388 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3391 Perl_my_unexec(pTHX)
3393 PERL_UNUSED_CONTEXT;
3395 SV * prog = newSVpv(BIN_EXP, 0);
3396 SV * file = newSVpv(PL_origfilename, 0);
3400 sv_catpvs(prog, "/perl");
3401 sv_catpvs(file, ".perldump");
3403 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3404 /* unexec prints msg to stderr in case of failure */
3405 PerlProc_exit(status);
3408 # include <lib$routines.h>
3409 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3410 # elif defined(WIN32) || defined(__CYGWIN__)
3411 Perl_croak(aTHX_ "dump is not supported");
3413 ABORT(); /* for use with undump */
3418 /* initialize curinterp */
3424 # define PERLVAR(var,type)
3425 # define PERLVARA(var,n,type)
3426 # if defined(PERL_IMPLICIT_CONTEXT)
3427 # define PERLVARI(var,type,init) aTHX->var = init;
3428 # define PERLVARIC(var,type,init) aTHX->var = init;
3430 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3431 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3433 # include "intrpvar.h"
3434 # include "thrdvar.h"
3440 # define PERLVAR(var,type)
3441 # define PERLVARA(var,n,type)
3442 # define PERLVARI(var,type,init) PL_##var = init;
3443 # define PERLVARIC(var,type,init) PL_##var = init;
3444 # include "intrpvar.h"
3445 # include "thrdvar.h"
3455 S_init_main_stash(pTHX)
3460 PL_curstash = PL_defstash = newHV();
3461 /* We know that the string "main" will be in the global shared string
3462 table, so it's a small saving to use it rather than allocate another
3464 PL_curstname = newSVpvs_share("main");
3465 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3466 /* If we hadn't caused another reference to "main" to be in the shared
3467 string table above, then it would be worth reordering these two,
3468 because otherwise all we do is delete "main" from it as a consequence
3469 of the SvREFCNT_dec, only to add it again with hv_name_set */
3470 SvREFCNT_dec(GvHV(gv));
3471 hv_name_set(PL_defstash, "main", 4, 0);
3472 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3474 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3476 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3477 GvMULTI_on(PL_incgv);
3478 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3479 GvMULTI_on(PL_hintgv);
3480 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3481 SvREFCNT_inc_simple(PL_defgv);
3482 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3483 SvREFCNT_inc_simple(PL_errgv);
3484 GvMULTI_on(PL_errgv);
3485 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3486 GvMULTI_on(PL_replgv);
3487 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3488 #ifdef PERL_DONT_CREATE_GVSV
3491 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3492 sv_setpvn(ERRSV, "", 0);
3493 PL_curstash = PL_defstash;
3494 CopSTASH_set(&PL_compiling, PL_defstash);
3495 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3496 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3498 /* We must init $/ before switches are processed. */
3499 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3503 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3509 const char *cpp_discard_flag;
3518 PL_origfilename = savepvs("-e");
3521 /* if find_script() returns, it returns a malloc()-ed value */
3522 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3524 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3525 const char *s = scriptname + 8;
3531 * Tell apart "normal" usage of fdscript, e.g.
3532 * with bash on FreeBSD:
3533 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3534 * from usage in suidperl.
3535 * Does any "normal" usage leave garbage after the number???
3536 * Is it a mistake to use a similar /dev/fd/ construct for
3541 * Be supersafe and do some sanity-checks.
3542 * Still, can we be sure we got the right thing?
3545 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3548 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3550 scriptname = savepv(s + 1);
3551 Safefree(PL_origfilename);
3552 PL_origfilename = (char *)scriptname;
3557 CopFILE_free(PL_curcop);
3558 CopFILE_set(PL_curcop, PL_origfilename);
3559 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3560 scriptname = (char *)"";
3561 if (fdscript >= 0) {
3562 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3563 # if defined(HAS_FCNTL) && defined(F_SETFD)
3565 /* ensure close-on-exec */
3566 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3571 Perl_croak(aTHX_ "sperl needs fd script\n"
3572 "You should not call sperl directly; do you need to "
3573 "change a #! line\nfrom sperl to perl?\n");
3576 * Do not open (or do other fancy stuff) while setuid.
3577 * Perl does the open, and hands script to suidperl on a fd;
3578 * suidperl only does some checks, sets up UIDs and re-execs
3579 * perl with that fd as it has always done.
3582 if (*suidscript != 1) {
3583 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3586 else if (PL_preprocess) {
3587 const char * const cpp_cfg = CPPSTDIN;
3588 SV * const cpp = newSVpvs("");
3589 SV * const cmd = newSV(0);
3591 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3592 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3593 if (strEQ(cpp_cfg, "cppstdin"))
3594 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3595 sv_catpv(cpp, cpp_cfg);
3598 sv_catpvs(sv, "-I");
3599 sv_catpv(sv,PRIVLIB_EXP);
3602 DEBUG_P(PerlIO_printf(Perl_debug_log,
3603 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3604 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3607 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3614 cpp_discard_flag = "";
3616 cpp_discard_flag = "-C";
3620 perl = os2_execname(aTHX);
3622 perl = PL_origargv[0];
3626 /* This strips off Perl comments which might interfere with
3627 the C pre-processor, including #!. #line directives are
3628 deliberately stripped to avoid confusion with Perl's version
3629 of #line. FWP played some golf with it so it will fit
3630 into VMS's 255 character buffer.
3633 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3635 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3637 Perl_sv_setpvf(aTHX_ cmd, "\
3638 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3639 perl, quote, code, quote, scriptname, cpp,
3640 cpp_discard_flag, sv, CPPMINUS);
3642 PL_doextract = FALSE;
3644 DEBUG_P(PerlIO_printf(Perl_debug_log,
3645 "PL_preprocess: cmd=\"%s\"\n",
3648 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3652 else if (!*scriptname) {
3653 forbid_setid(0, *suidscript);
3654 PL_rsfp = PerlIO_stdin();
3657 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3658 # if defined(HAS_FCNTL) && defined(F_SETFD)
3660 /* ensure close-on-exec */
3661 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3664 #endif /* IAMSUID */
3666 /* PSz 16 Sep 03 Keep neat error message */
3668 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3670 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3671 CopFILE(PL_curcop), Strerror(errno));
3677 * I_SYSSTATVFS HAS_FSTATVFS
3679 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3680 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3681 * here so that metaconfig picks them up. */
3685 S_fd_on_nosuid_fs(pTHX_ int fd)
3688 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3689 * but is needed also on machines without setreuid.
3690 * Seems safe enough to run as root.
3692 int check_okay = 0; /* able to do all the required sys/libcalls */
3693 int on_nosuid = 0; /* the fd is on a nosuid fs */
3695 * Need to check noexec also: nosuid might not be set, the average
3696 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3698 int on_noexec = 0; /* the fd is on a noexec fs */
3701 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3702 * fstatvfs() is UNIX98.
3703 * fstatfs() is 4.3 BSD.
3704 * ustat()+getmnt() is pre-4.3 BSD.
3705 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3706 * an irrelevant filesystem while trying to reach the right one.
3709 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3711 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3712 defined(HAS_FSTATVFS)
3713 # define FD_ON_NOSUID_CHECK_OKAY
3714 struct statvfs stfs;
3716 check_okay = fstatvfs(fd, &stfs) == 0;
3717 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3719 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3720 on platforms where it is present. */
3721 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3723 # endif /* fstatvfs */
3725 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3726 defined(PERL_MOUNT_NOSUID) && \
3727 defined(PERL_MOUNT_NOEXEC) && \
3728 defined(HAS_FSTATFS) && \
3729 defined(HAS_STRUCT_STATFS) && \
3730 defined(HAS_STRUCT_STATFS_F_FLAGS)
3731 # define FD_ON_NOSUID_CHECK_OKAY
3734 check_okay = fstatfs(fd, &stfs) == 0;
3735 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3736 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3737 # endif /* fstatfs */
3739 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3740 defined(PERL_MOUNT_NOSUID) && \
3741 defined(PERL_MOUNT_NOEXEC) && \
3742 defined(HAS_FSTAT) && \
3743 defined(HAS_USTAT) && \
3744 defined(HAS_GETMNT) && \
3745 defined(HAS_STRUCT_FS_DATA) && \
3747 # define FD_ON_NOSUID_CHECK_OKAY
3750 if (fstat(fd, &fdst) == 0) {
3752 if (ustat(fdst.st_dev, &us) == 0) {
3754 /* NOSTAT_ONE here because we're not examining fields which
3755 * vary between that case and STAT_ONE. */
3756 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3757 size_t cmplen = sizeof(us.f_fname);
3758 if (sizeof(fsd.fd_req.path) < cmplen)
3759 cmplen = sizeof(fsd.fd_req.path);
3760 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3761 fdst.st_dev == fsd.fd_req.dev) {
3763 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3764 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3769 # endif /* fstat+ustat+getmnt */
3771 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3772 defined(HAS_GETMNTENT) && \
3773 defined(HAS_HASMNTOPT) && \
3774 defined(MNTOPT_NOSUID) && \
3775 defined(MNTOPT_NOEXEC)
3776 # define FD_ON_NOSUID_CHECK_OKAY
3777 FILE *mtab = fopen("/etc/mtab", "r");
3778 struct mntent *entry;
3781 if (mtab && (fstat(fd, &stb) == 0)) {
3782 while (entry = getmntent(mtab)) {
3783 if (stat(entry->mnt_dir, &fsb) == 0
3784 && fsb.st_dev == stb.st_dev)
3786 /* found the filesystem */
3788 if (hasmntopt(entry, MNTOPT_NOSUID))
3790 if (hasmntopt(entry, MNTOPT_NOEXEC))
3793 } /* A single fs may well fail its stat(). */
3798 # endif /* getmntent+hasmntopt */
3801 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3803 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3805 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3806 return ((!check_okay) || on_nosuid || on_noexec);
3808 #endif /* IAMSUID */
3811 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3812 int fdscript, int suidscript)
3817 #endif /* IAMSUID */
3819 /* do we need to emulate setuid on scripts? */
3821 /* This code is for those BSD systems that have setuid #! scripts disabled
3822 * in the kernel because of a security problem. Merely defining DOSUID
3823 * in perl will not fix that problem, but if you have disabled setuid
3824 * scripts in the kernel, this will attempt to emulate setuid and setgid
3825 * on scripts that have those now-otherwise-useless bits set. The setuid
3826 * root version must be called suidperl or sperlN.NNN. If regular perl
3827 * discovers that it has opened a setuid script, it calls suidperl with
3828 * the same argv that it had. If suidperl finds that the script it has
3829 * just opened is NOT setuid root, it sets the effective uid back to the
3830 * uid. We don't just make perl setuid root because that loses the
3831 * effective uid we had before invoking perl, if it was different from the
3834 * Description/comments above do not match current workings:
3835 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3836 * suidperl called with script open and name changed to /dev/fd/N/X;
3837 * suidperl croaks if script is not setuid;
3838 * making perl setuid would be a huge security risk (and yes, that
3839 * would lose any euid we might have had).
3841 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3842 * be defined in suidperl only. suidperl must be setuid root. The
3843 * Configure script will set this up for you if you want it.
3849 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3850 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3851 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3853 const char *linestr;
3857 if (fdscript < 0 || suidscript != 1)
3858 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3860 * Since the script is opened by perl, not suidperl, some of these
3861 * checks are superfluous. Leaving them in probably does not lower
3865 * Do checks even for systems with no HAS_SETREUID.
3866 * We used to swap, then re-swap UIDs with
3868 if (setreuid(PL_euid,PL_uid) < 0
3869 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3870 Perl_croak(aTHX_ "Can't swap uid and euid");
3873 if (setreuid(PL_uid,PL_euid) < 0
3874 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3875 Perl_croak(aTHX_ "Can't reswap uid and euid");
3879 /* On this access check to make sure the directories are readable,
3880 * there is actually a small window that the user could use to make
3881 * filename point to an accessible directory. So there is a faint
3882 * chance that someone could execute a setuid script down in a
3883 * non-accessible directory. I don't know what to do about that.
3884 * But I don't think it's too important. The manual lies when
3885 * it says access() is useful in setuid programs.
3887 * So, access() is pretty useless... but not harmful... do anyway.
3889 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3890 Perl_croak(aTHX_ "Can't access() script\n");
3893 /* If we can swap euid and uid, then we can determine access rights
3894 * with a simple stat of the file, and then compare device and
3895 * inode to make sure we did stat() on the same file we opened.
3896 * Then we just have to make sure he or she can execute it.
3899 * As the script is opened by perl, not suidperl, we do not need to
3900 * care much about access rights.
3902 * The 'script changed' check is needed, or we can get lied to
3903 * about $0 with e.g.
3904 * suidperl /dev/fd/4//bin/x 4<setuidscript
3905 * Without HAS_SETREUID, is it safe to stat() as root?
3907 * Are there any operating systems that pass /dev/fd/xxx for setuid
3908 * scripts, as suggested/described in perlsec(1)? Surely they do not
3909 * pass the script name as we do, so the "script changed" test would
3910 * fail for them... but we never get here with
3911 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3913 * This is one place where we must "lie" about return status: not
3914 * say if the stat() failed. We are doing this as root, and could
3915 * be tricked into reporting existence or not of files that the
3916 * "plain" user cannot even see.
3920 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3921 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3922 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3923 Perl_croak(aTHX_ "Setuid script changed\n");
3927 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3928 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3931 * We used to do this check as the "plain" user (after swapping
3932 * UIDs). But the check for nosuid and noexec filesystem is needed,
3933 * and should be done even without HAS_SETREUID. (Maybe those
3934 * operating systems do not have such mount options anyway...)
3935 * Seems safe enough to do as root.
3937 #if !defined(NO_NOSUID_CHECK)
3938 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3939 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3942 #endif /* IAMSUID */
3944 if (!S_ISREG(PL_statbuf.st_mode)) {
3945 Perl_croak(aTHX_ "Setuid script not plain file\n");
3947 if (PL_statbuf.st_mode & S_IWOTH)
3948 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3949 PL_doswitches = FALSE; /* -s is insecure in suid */
3950 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3951 CopLINE_inc(PL_curcop);
3952 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3953 Perl_croak(aTHX_ "No #! line");
3954 linestr = SvPV_nolen_const(PL_linestr);
3955 /* required even on Sys V */
3956 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3957 Perl_croak(aTHX_ "No #! line");
3961 /* Sanity check on line length */
3962 s_end = s + strlen(s);
3963 if (s_end == s || (s_end - s) > 4000)
3964 Perl_croak(aTHX_ "Very long #! line");
3965 /* Allow more than a single space after #! */
3966 while (isSPACE(*s)) s++;
3967 /* Sanity check on buffer end */
3968 while ((*s) && !isSPACE(*s)) s++;
3969 for (s2 = s; (s2 > linestr &&
3970 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3971 || s2[-1] == '-')); s2--) ;
3972 /* Sanity check on buffer start */
3973 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3974 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3975 Perl_croak(aTHX_ "Not a perl script");
3976 while (*s == ' ' || *s == '\t') s++;
3978 * #! arg must be what we saw above. They can invoke it by
3979 * mentioning suidperl explicitly, but they may not add any strange
3980 * arguments beyond what #! says if they do invoke suidperl that way.
3983 * The way validarg was set up, we rely on the kernel to start
3984 * scripts with argv[1] set to contain all #! line switches (the
3988 * Check that we got all the arguments listed in the #! line (not
3989 * just that there are no extraneous arguments). Might not matter
3990 * much, as switches from #! line seem to be acted upon (also), and
3991 * so may be checked and trapped in perl. But, security checks must
3992 * be done in suidperl and not deferred to perl. Note that suidperl
3993 * does not get around to parsing (and checking) the switches on
3994 * the #! line (but execs perl sooner).
3995 * Allow (require) a trailing newline (which may be of two
3996 * characters on some architectures?) (but no other trailing
3999 len = strlen(validarg);
4000 if (strEQ(validarg," PHOOEY ") ||
4001 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4002 !((s_end - s) == len+1
4003 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4004 Perl_croak(aTHX_ "Args must match #! line");
4008 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4009 PL_euid == PL_statbuf.st_uid)
4011 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4012 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4013 #endif /* IAMSUID */
4016 PL_euid) { /* oops, we're not the setuid root perl */
4018 * When root runs a setuid script, we do not go through the same
4019 * steps of execing sperl and then perl with fd scripts, but
4020 * simply set up UIDs within the same perl invocation; so do
4021 * not have the same checks (on options, whatever) that we have
4022 * for plain users. No problem really: would have to be a script
4023 * that does not actually work for plain users; and if root is
4024 * foolish and can be persuaded to run such an unsafe script, he
4025 * might run also non-setuid ones, and deserves what he gets.
4027 * Or, we might drop the PL_euid check above (and rely just on
4028 * fdscript to avoid loops), and do the execs
4034 * Pass fd script to suidperl.
4035 * Exec suidperl, substituting fd script for scriptname.
4036 * Pass script name as "subdir" of fd, which perl will grok;
4037 * in fact will use that to distinguish this from "normal"
4038 * usage, see comments above.
4040 PerlIO_rewind(PL_rsfp);
4041 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4042 /* PSz 27 Feb 04 Sanity checks on scriptname */
4043 if ((!scriptname) || (!*scriptname) ) {
4044 Perl_croak(aTHX_ "No setuid script name\n");
4046 if (*scriptname == '-') {
4047 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4048 /* Or we might confuse it with an option when replacing
4049 * name in argument list, below (though we do pointer, not
4050 * string, comparisons).
4053 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4054 if (!PL_origargv[which]) {
4055 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4057 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4058 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4059 #if defined(HAS_FCNTL) && defined(F_SETFD)
4060 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4063 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4064 (int)PERL_REVISION, (int)PERL_VERSION,
4065 (int)PERL_SUBVERSION), PL_origargv);
4067 #endif /* IAMSUID */
4068 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4071 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4073 * This seems back to front: we try HAS_SETEGID first; if not available
4074 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4075 * in the sense that we only want to set EGID; but are there any machines
4076 * with either of the latter, but not the former? Same with UID, later.
4079 (void)setegid(PL_statbuf.st_gid);
4082 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4084 #ifdef HAS_SETRESGID
4085 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4087 PerlProc_setgid(PL_statbuf.st_gid);
4091 if (PerlProc_getegid() != PL_statbuf.st_gid)
4092 Perl_croak(aTHX_ "Can't do setegid!\n");
4094 if (PL_statbuf.st_mode & S_ISUID) {
4095 if (PL_statbuf.st_uid != PL_euid)
4097 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4100 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4102 #ifdef HAS_SETRESUID
4103 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4105 PerlProc_setuid(PL_statbuf.st_uid);
4109 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4110 Perl_croak(aTHX_ "Can't do seteuid!\n");
4112 else if (PL_uid) { /* oops, mustn't run as root */
4114 (void)seteuid((Uid_t)PL_uid);
4117 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4119 #ifdef HAS_SETRESUID
4120 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4122 PerlProc_setuid((Uid_t)PL_uid);
4126 if (PerlProc_geteuid() != PL_uid)
4127 Perl_croak(aTHX_ "Can't do seteuid!\n");
4130 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4131 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4134 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4135 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4136 else if (fdscript < 0 || suidscript != 1)
4137 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4138 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4140 /* PSz 16 Sep 03 Keep neat error message */
4141 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4144 /* We absolutely must clear out any saved ids here, so we */
4145 /* exec the real perl, substituting fd script for scriptname. */
4146 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4148 * It might be thought that using setresgid and/or setresuid (changed to
4149 * set the saved IDs) above might obviate the need to exec, and we could
4150 * go on to "do the perl thing".
4152 * Is there such a thing as "saved GID", and is that set for setuid (but
4153 * not setgid) execution like suidperl? Without exec, it would not be
4154 * cleared for setuid (but not setgid) scripts (or might need a dummy
4157 * We need suidperl to do the exact same argument checking that perl
4158 * does. Thus it cannot be very small; while it could be significantly
4159 * smaller, it is safer (simpler?) to make it essentially the same
4160 * binary as perl (but they are not identical). - Maybe could defer that
4161 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4162 * but prefer to do thorough checks in suidperl itself. Such deferral
4163 * would make suidperl security rely on perl, a design no-no.
4165 * Setuid things should be short and simple, thus easy to understand and
4166 * verify. They should do their "own thing", without influence by
4167 * attackers. It may help if their internal execution flow is fixed,
4168 * regardless of platform: it may be best to exec anyway.
4170 * Suidperl should at least be conceptually simple: a wrapper only,
4171 * never to do any real perl. Maybe we should put
4173 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4175 * into the perly bits.
4177 PerlIO_rewind(PL_rsfp);
4178 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4180 * Keep original arguments: suidperl already has fd script.
4182 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4183 /* if (!PL_origargv[which]) { */
4184 /* errno = EPERM; */
4185 /* Perl_croak(aTHX_ "Permission denied\n"); */
4187 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4188 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4189 #if defined(HAS_FCNTL) && defined(F_SETFD)
4190 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4193 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4194 (int)PERL_REVISION, (int)PERL_VERSION,
4195 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4197 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4198 #endif /* IAMSUID */
4200 PERL_UNUSED_ARG(fdscript);
4201 PERL_UNUSED_ARG(suidscript);
4202 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4203 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4204 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4205 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4207 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4210 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4211 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4212 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4213 /* not set-id, must be wrapped */
4216 PERL_UNUSED_ARG(validarg);
4217 PERL_UNUSED_ARG(scriptname);
4221 S_find_beginning(pTHX)
4225 register const char *s2;
4226 #ifdef MACOS_TRADITIONAL
4230 /* skip forward in input to the real script? */
4232 #ifdef MACOS_TRADITIONAL
4233 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4235 while (PL_doextract || gMacPerl_AlwaysExtract) {
4236 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4237 if (!gMacPerl_AlwaysExtract)
4238 Perl_croak(aTHX_ "No Perl script found in input\n");
4240 if (PL_doextract) /* require explicit override ? */
4241 if (!OverrideExtract(PL_origfilename))
4242 Perl_croak(aTHX_ "User aborted script\n");
4244 PL_doextract = FALSE;
4246 /* Pater peccavi, file does not have #! */
4247 PerlIO_rewind(PL_rsfp);
4252 while (PL_doextract) {
4253 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4254 Perl_croak(aTHX_ "No Perl script found in input\n");
4257 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4258 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4259 PL_doextract = FALSE;
4260 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4262 while (*s == ' ' || *s == '\t') s++;
4264 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4265 || s2[-1] == '_') s2--;
4266 if (strnEQ(s2-4,"perl",4))
4267 while ((s = moreswitches(s)))
4270 #ifdef MACOS_TRADITIONAL
4271 /* We are always searching for the #!perl line in MacPerl,
4272 * so if we find it, still keep the line count correct
4273 * by counting lines we already skipped over
4275 for (; maclines > 0 ; maclines--)
4276 PerlIO_ungetc(PL_rsfp, '\n');
4280 /* gMacPerl_AlwaysExtract is false in MPW tool */
4281 } else if (gMacPerl_AlwaysExtract) {
4293 PL_uid = PerlProc_getuid();
4294 PL_euid = PerlProc_geteuid();
4295 PL_gid = PerlProc_getgid();
4296 PL_egid = PerlProc_getegid();
4298 PL_uid |= PL_gid << 16;
4299 PL_euid |= PL_egid << 16;
4301 /* Should not happen: */
4302 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4303 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4306 * Should go by suidscript, not uid!=euid: why disallow
4307 * system("ls") in scripts run from setuid things?
4308 * Or, is this run before we check arguments and set suidscript?
4309 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4310 * (We never have suidscript, can we be sure to have fdscript?)
4311 * Or must then go by UID checks? See comments in forbid_setid also.
4315 /* This is used very early in the lifetime of the program,
4316 * before even the options are parsed, so PL_tainting has
4317 * not been initialized properly. */
4319 Perl_doing_taint(int argc, char *argv[], char *envp[])
4321 #ifndef PERL_IMPLICIT_SYS
4322 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4323 * before we have an interpreter-- and the whole point of this
4324 * function is to be called at such an early stage. If you are on
4325 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4326 * "tainted because running with altered effective ids', you'll
4327 * have to add your own checks somewhere in here. The two most
4328 * known samples of 'implicitness' are Win32 and NetWare, neither
4329 * of which has much of concept of 'uids'. */
4330 int uid = PerlProc_getuid();
4331 int euid = PerlProc_geteuid();
4332 int gid = PerlProc_getgid();
4333 int egid = PerlProc_getegid();
4340 if (uid && (euid != uid || egid != gid))
4342 #endif /* !PERL_IMPLICIT_SYS */
4343 /* This is a really primitive check; environment gets ignored only
4344 * if -T are the first chars together; otherwise one gets
4345 * "Too late" message. */
4346 if ( argc > 1 && argv[1][0] == '-'
4347 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4352 /* Passing the flag as a single char rather than a string is a slight space
4353 optimisation. The only message that isn't /^-.$/ is
4354 "program input from stdin", which is substituted in place of '\0', which
4355 could never be a command line flag. */
4357 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4360 char string[3] = "-x";
4361 const char *message = "program input from stdin";
4368 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4369 if (PL_euid != PL_uid)
4370 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4371 if (PL_egid != PL_gid)
4372 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4373 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4375 * Checks for UID/GID above "wrong": why disallow
4376 * perl -e 'print "Hello\n"'
4377 * from within setuid things?? Simply drop them: replaced by
4378 * fdscript/suidscript and #ifdef IAMSUID checks below.
4380 * This may be too late for command-line switches. Will catch those on
4381 * the #! line, after finding the script name and setting up
4382 * fdscript/suidscript. Note that suidperl does not get around to
4383 * parsing (and checking) the switches on the #! line, but checks that
4384 * the two sets are identical.
4386 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4387 * instead, or would that be "too late"? (We never have suidscript, can
4388 * we be sure to have fdscript?)
4390 * Catch things with suidscript (in descendant of suidperl), even with
4391 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4392 * below; but I am paranoid.
4394 * Also see comments about root running a setuid script, elsewhere.
4396 if (suidscript >= 0)
4397 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4399 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4400 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4401 #endif /* IAMSUID */
4405 Perl_init_debugger(pTHX)
4408 HV * const ostash = PL_curstash;
4410 PL_curstash = PL_debstash;
4411 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4413 AvREAL_off(PL_dbargs);
4414 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4415 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4416 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4417 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4418 sv_setiv(PL_DBsingle, 0);
4419 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4420 sv_setiv(PL_DBtrace, 0);
4421 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4422 sv_setiv(PL_DBsignal, 0);
4423 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4424 sv_setiv(PL_DBassertion, 0);
4425 PL_curstash = ostash;
4428 #ifndef STRESS_REALLOC
4429 #define REASONABLE(size) (size)
4431 #define REASONABLE(size) (1) /* unreasonable */
4435 Perl_init_stacks(pTHX)
4438 /* start with 128-item stack and 8K cxstack */
4439 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4440 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4441 PL_curstackinfo->si_type = PERLSI_MAIN;
4442 PL_curstack = PL_curstackinfo->si_stack;
4443 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4445 PL_stack_base = AvARRAY(PL_curstack);
4446 PL_stack_sp = PL_stack_base;
4447 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4449 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4452 PL_tmps_max = REASONABLE(128);
4454 Newx(PL_markstack,REASONABLE(32),I32);
4455 PL_markstack_ptr = PL_markstack;
4456 PL_markstack_max = PL_markstack + REASONABLE(32);
4460 Newx(PL_scopestack,REASONABLE(32),I32);
4461 PL_scopestack_ix = 0;
4462 PL_scopestack_max = REASONABLE(32);
4464 Newx(PL_savestack,REASONABLE(128),ANY);
4465 PL_savestack_ix = 0;
4466 PL_savestack_max = REASONABLE(128);
4475 while (PL_curstackinfo->si_next)
4476 PL_curstackinfo = PL_curstackinfo->si_next;
4477 while (PL_curstackinfo) {
4478 PERL_SI *p = PL_curstackinfo->si_prev;
4479 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4480 Safefree(PL_curstackinfo->si_cxstack);
4481 Safefree(PL_curstackinfo);
4482 PL_curstackinfo = p;
4484 Safefree(PL_tmps_stack);
4485 Safefree(PL_markstack);
4486 Safefree(PL_scopestack);
4487 Safefree(PL_savestack);
4497 lex_start(PL_linestr);
4499 PL_subname = newSVpvs("main");
4503 S_init_predump_symbols(pTHX)
4509 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4510 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4511 GvMULTI_on(PL_stdingv);
4512 io = GvIOp(PL_stdingv);
4513 IoTYPE(io) = IoTYPE_RDONLY;
4514 IoIFP(io) = PerlIO_stdin();
4515 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4517 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4519 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4522 IoTYPE(io) = IoTYPE_WRONLY;
4523 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4525 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4527 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4529 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4530 GvMULTI_on(PL_stderrgv);
4531 io = GvIOp(PL_stderrgv);
4532 IoTYPE(io) = IoTYPE_WRONLY;
4533 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4534 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4536 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4538 PL_statname = newSV(0); /* last filename we did stat on */
4540 Safefree(PL_osname);
4541 PL_osname = savepv(OSNAME);
4545 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4548 argc--,argv++; /* skip name of script */
4549 if (PL_doswitches) {
4550 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4554 if (argv[0][1] == '-' && !argv[0][2]) {
4558 if ((s = strchr(argv[0], '='))) {
4559 const char *const start_name = argv[0] + 1;
4560 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4561 TRUE, SVt_PV)), s + 1);
4564 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4567 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4568 GvMULTI_on(PL_argvgv);
4569 (void)gv_AVadd(PL_argvgv);
4570 av_clear(GvAVn(PL_argvgv));
4571 for (; argc > 0; argc--,argv++) {
4572 SV * const sv = newSVpv(argv[0],0);
4573 av_push(GvAVn(PL_argvgv),sv);
4574 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4575 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4578 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4579 (void)sv_utf8_decode(sv);
4585 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4590 PL_toptarget = newSV(0);
4591 sv_upgrade(PL_toptarget, SVt_PVFM);
4592 sv_setpvn(PL_toptarget, "", 0);
4593 PL_bodytarget = newSV(0);
4594 sv_upgrade(PL_bodytarget, SVt_PVFM);
4595 sv_setpvn(PL_bodytarget, "", 0);
4596 PL_formtarget = PL_bodytarget;
4600 init_argv_symbols(argc,argv);
4602 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4603 #ifdef MACOS_TRADITIONAL
4604 /* $0 is not majick on a Mac */
4605 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4607 sv_setpv(GvSV(tmpgv),PL_origfilename);
4608 magicname("0", "0", 1);
4611 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4613 GvMULTI_on(PL_envgv);
4614 hv = GvHVn(PL_envgv);
4615 hv_magic(hv, NULL, PERL_MAGIC_env);
4617 #ifdef USE_ENVIRON_ARRAY
4618 /* Note that if the supplied env parameter is actually a copy
4619 of the global environ then it may now point to free'd memory
4620 if the environment has been modified since. To avoid this
4621 problem we treat env==NULL as meaning 'use the default'
4626 # ifdef USE_ITHREADS
4627 && PL_curinterp == aTHX
4634 char** origenv = environ;
4637 for (; *env; env++) {
4638 if (!(s = strchr(*env,'=')) || s == *env)
4640 #if defined(MSDOS) && !defined(DJGPP)
4645 sv = newSVpv(s+1, 0);
4646 (void)hv_store(hv, *env, s - *env, sv, 0);
4649 if (origenv != environ) {
4650 /* realloc has shifted us */
4651 env = (env - origenv) + environ;
4656 #endif /* USE_ENVIRON_ARRAY */
4657 #endif /* !PERL_MICRO */
4660 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4661 SvREADONLY_off(GvSV(tmpgv));
4662 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4663 SvREADONLY_on(GvSV(tmpgv));
4665 #ifdef THREADS_HAVE_PIDS
4666 PL_ppid = (IV)getppid();
4669 /* touch @F array to prevent spurious warnings 20020415 MJD */
4671 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4673 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4674 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4675 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4679 S_init_perllib(pTHX)
4685 s = PerlEnv_getenv("PERL5LIB");
4687 * It isn't possible to delete an environment variable with
4688 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4689 * case we treat PERL5LIB as undefined if it has a zero-length value.
4691 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4692 if (s && *s != '\0')
4696 incpush(s, TRUE, TRUE, TRUE, FALSE);
4698 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4700 /* Treat PERL5?LIB as a possible search list logical name -- the
4701 * "natural" VMS idiom for a Unix path string. We allow each
4702 * element to be a set of |-separated directories for compatibility.
4706 if (my_trnlnm("PERL5LIB",buf,0))
4707 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4709 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4713 /* Use the ~-expanded versions of APPLLIB (undocumented),
4714 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4717 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4721 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4723 #ifdef MACOS_TRADITIONAL
4726 SV * privdir = newSV(0);
4727 char * macperl = PerlEnv_getenv("MACPERL");
4732 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4733 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4734 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4735 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4736 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4737 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4739 SvREFCNT_dec(privdir);
4742 incpush(":", FALSE, FALSE, TRUE, FALSE);
4745 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4748 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4750 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4754 /* sitearch is always relative to sitelib on Windows for
4755 * DLL-based path intuition to work correctly */
4756 # if !defined(WIN32)
4757 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4763 /* this picks up sitearch as well */
4764 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4766 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4770 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4771 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4774 #ifdef PERL_VENDORARCH_EXP
4775 /* vendorarch is always relative to vendorlib on Windows for
4776 * DLL-based path intuition to work correctly */
4777 # if !defined(WIN32)
4778 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4782 #ifdef PERL_VENDORLIB_EXP
4784 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4786 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4790 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4791 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4794 #ifdef PERL_OTHERLIBDIRS
4795 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4799 incpush(".", FALSE, FALSE, TRUE, FALSE);
4800 #endif /* MACOS_TRADITIONAL */
4803 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4804 # define PERLLIB_SEP ';'
4807 # define PERLLIB_SEP '|'
4809 # if defined(MACOS_TRADITIONAL)
4810 # define PERLLIB_SEP ','
4812 # define PERLLIB_SEP ':'
4816 #ifndef PERLLIB_MANGLE
4817 # define PERLLIB_MANGLE(s,n) (s)
4820 /* Push a directory onto @INC if it exists.
4821 Generate a new SV if we do this, to save needing to copy the SV we push
4824 S_incpush_if_exists(pTHX_ SV *dir)
4828 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4829 S_ISDIR(tmpstatbuf.st_mode)) {
4830 av_push(GvAVn(PL_incgv), dir);
4837 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4842 const char *p = dir;
4847 if (addsubdirs || addoldvers) {
4851 /* Break at all separators */
4853 SV *libdir = newSV(0);
4856 /* skip any consecutive separators */
4858 while ( *p == PERLLIB_SEP ) {
4859 /* Uncomment the next line for PATH semantics */
4860 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4865 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4866 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4871 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4872 p = NULL; /* break out */
4874 #ifdef MACOS_TRADITIONAL
4875 if (!strchr(SvPVX(libdir), ':')) {
4878 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4880 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4881 sv_catpvs(libdir, ":");
4884 /* Do the if() outside the #ifdef to avoid warnings about an unused
4887 #ifdef PERL_RELOCATABLE_INC
4889 * Relocatable include entries are marked with a leading .../
4892 * 0: Remove that leading ".../"
4893 * 1: Remove trailing executable name (anything after the last '/')
4894 * from the perl path to give a perl prefix
4896 * While the @INC element starts "../" and the prefix ends with a real
4897 * directory (ie not . or ..) chop that real directory off the prefix
4898 * and the leading "../" from the @INC element. ie a logical "../"
4900 * Finally concatenate the prefix and the remainder of the @INC element
4901 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4902 * generates /usr/local/lib/perl5
4904 const char *libpath = SvPVX(libdir);
4905 STRLEN libpath_len = SvCUR(libdir);
4906 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4908 SV * const caret_X = get_sv("\030", 0);
4909 /* Going to use the SV just as a scratch buffer holding a C
4915 /* $^X is *the* source of taint if tainting is on, hence
4916 SvPOK() won't be true. */
4918 assert(SvPOKp(caret_X));
4919 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4920 /* Firstly take off the leading .../
4921 If all else fail we'll do the paths relative to the current
4923 sv_chop(libdir, libpath + 4);
4924 /* Don't use SvPV as we're intentionally bypassing taining,
4925 mortal copies that the mg_get of tainting creates, and
4926 corruption that seems to come via the save stack.
4927 I guess that the save stack isn't correctly set up yet. */
4928 libpath = SvPVX(libdir);
4929 libpath_len = SvCUR(libdir);
4931 /* This would work more efficiently with memrchr, but as it's
4932 only a GNU extension we'd need to probe for it and
4933 implement our own. Not hard, but maybe not worth it? */
4935 prefix = SvPVX(prefix_sv);
4936 lastslash = strrchr(prefix, '/');
4938 /* First time in with the *lastslash = '\0' we just wipe off
4939 the trailing /perl from (say) /usr/foo/bin/perl
4943 while ((*lastslash = '\0'), /* Do that, come what may. */
4944 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4945 && (lastslash = strrchr(prefix, '/')))) {
4946 if (lastslash[1] == '\0'
4947 || (lastslash[1] == '.'
4948 && (lastslash[2] == '/' /* ends "/." */
4949 || (lastslash[2] == '/'
4950 && lastslash[3] == '/' /* or "/.." */
4952 /* Prefix ends "/" or "/." or "/..", any of which
4953 are fishy, so don't do any more logical cleanup.
4957 /* Remove leading "../" from path */
4960 /* Next iteration round the loop removes the last
4961 directory name from prefix by writing a '\0' in
4962 the while clause. */
4964 /* prefix has been terminated with a '\0' to the correct
4965 length. libpath points somewhere into the libdir SV.
4966 We need to join the 2 with '/' and drop the result into
4968 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4969 SvREFCNT_dec(libdir);
4970 /* And this is the new libdir. */
4973 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4974 /* Need to taint reloccated paths if running set ID */
4975 SvTAINTED_on(libdir);
4978 SvREFCNT_dec(prefix_sv);
4983 * BEFORE pushing libdir onto @INC we may first push version- and
4984 * archname-specific sub-directories.
4986 if (addsubdirs || addoldvers) {
4987 #ifdef PERL_INC_VERSION_LIST
4988 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4989 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4990 const char * const *incver;
4996 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4998 while (unix[len-1] == '/') len--; /* Cosmetic */
4999 sv_usepvn(libdir,unix,len);
5002 PerlIO_printf(Perl_error_log,
5003 "Failed to unixify @INC element \"%s\"\n",
5007 #ifdef MACOS_TRADITIONAL
5008 #define PERL_AV_SUFFIX_FMT ""
5009 #define PERL_ARCH_FMT "%s:"
5010 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5012 #define PERL_AV_SUFFIX_FMT "/"
5013 #define PERL_ARCH_FMT "/%s"
5014 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5016 /* .../version/archname if -d .../version/archname */
5017 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5019 (int)PERL_REVISION, (int)PERL_VERSION,
5020 (int)PERL_SUBVERSION, ARCHNAME);
5021 subdir = S_incpush_if_exists(aTHX_ subdir);
5023 /* .../version if -d .../version */
5024 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5025 (int)PERL_REVISION, (int)PERL_VERSION,
5026 (int)PERL_SUBVERSION);
5027 subdir = S_incpush_if_exists(aTHX_ subdir);
5029 /* .../archname if -d .../archname */
5030 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5031 subdir = S_incpush_if_exists(aTHX_ subdir);
5035 #ifdef PERL_INC_VERSION_LIST
5037 for (incver = incverlist; *incver; incver++) {
5038 /* .../xxx if -d .../xxx */
5039 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5040 subdir = S_incpush_if_exists(aTHX_ subdir);
5046 /* finally push this lib directory on the end of @INC */
5047 av_push(GvAVn(PL_incgv), libdir);
5050 assert (SvREFCNT(subdir) == 1);
5051 SvREFCNT_dec(subdir);
5057 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5061 const line_t oldline = CopLINE(PL_curcop);
5067 while (av_len(paramList) >= 0) {
5068 cv = (CV*)av_shift(paramList);
5070 if (paramList == PL_beginav) {
5071 /* save PL_beginav for compiler */
5072 if (! PL_beginav_save)
5073 PL_beginav_save = newAV();
5074 av_push(PL_beginav_save, (SV*)cv);
5076 else if (paramList == PL_checkav) {
5077 /* save PL_checkav for compiler */
5078 if (! PL_checkav_save)
5079 PL_checkav_save = newAV();
5080 av_push(PL_checkav_save, (SV*)cv);
5090 (void)SvPV_const(atsv, len);
5092 PL_curcop = &PL_compiling;
5093 CopLINE_set(PL_curcop, oldline);
5094 if (paramList == PL_beginav)
5095 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5097 Perl_sv_catpvf(aTHX_ atsv,
5098 "%s failed--call queue aborted",
5099 paramList == PL_checkav ? "CHECK"
5100 : paramList == PL_initav ? "INIT"
5102 while (PL_scopestack_ix > oldscope)
5105 Perl_croak(aTHX_ "%"SVf"", atsv);
5112 /* my_exit() was called */
5113 while (PL_scopestack_ix > oldscope)
5116 PL_curstash = PL_defstash;
5117 PL_curcop = &PL_compiling;
5118 CopLINE_set(PL_curcop, oldline);
5120 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5121 if (paramList == PL_beginav)
5122 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5124 Perl_croak(aTHX_ "%s failed--call queue aborted",
5125 paramList == PL_checkav ? "CHECK"
5126 : paramList == PL_initav ? "INIT"
5133 PL_curcop = &PL_compiling;
5134 CopLINE_set(PL_curcop, oldline);
5137 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5146 S_call_list_body(pTHX_ CV *cv)
5149 PUSHMARK(PL_stack_sp);
5150 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5155 Perl_my_exit(pTHX_ U32 status)
5158 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5159 thr, (unsigned long) status));
5168 STATUS_EXIT_SET(status);
5175 Perl_my_failure_exit(pTHX)
5179 /* We have been called to fall on our sword. The desired exit code
5180 * should be already set in STATUS_UNIX, but could be shifted over
5181 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5184 * If an error code has not been set, then force the issue.
5186 if (MY_POSIX_EXIT) {
5188 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5189 * the exit code when there isn't an error.
5192 if (STATUS_UNIX == 0)
5193 STATUS_UNIX_EXIT_SET(255);
5195 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5197 /* The exit code could have been set by $? or vmsish which
5198 * means that it may not be fatal. So convert
5199 * success/warning codes to fatal.
5201 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5202 STATUS_UNIX_EXIT_SET(255);
5206 /* Traditionally Perl on VMS always expects a Fatal Error. */
5207 if (vaxc$errno & 1) {
5209 /* So force success status to failure */
5210 if (STATUS_NATIVE & 1)
5215 STATUS_UNIX = EINTR; /* In case something cares */
5220 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5222 /* Encode the severity code */
5223 severity = STATUS_NATIVE & STS$M_SEVERITY;
5224 STATUS_UNIX = (severity ? severity : 1) << 8;
5226 /* Perl expects this to be a fatal error */
5227 if (severity != STS$K_SEVERE)
5236 STATUS_UNIX_SET(errno);
5238 exitstatus = STATUS_UNIX >> 8;
5239 if (exitstatus & 255)
5240 STATUS_UNIX_SET(exitstatus);
5242 STATUS_UNIX_SET(255);
5249 S_my_exit_jump(pTHX)
5254 SvREFCNT_dec(PL_e_script);
5258 POPSTACK_TO(PL_mainstack);
5266 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5269 const char * const p = SvPVX_const(PL_e_script);
5270 const char *nl = strchr(p, '\n');
5272 PERL_UNUSED_ARG(idx);
5273 PERL_UNUSED_ARG(maxlen);
5275 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5277 filter_del(read_e_script);
5280 sv_catpvn(buf_sv, p, nl-p);
5281 sv_chop(PL_e_script, nl);
5287 * c-indentation-style: bsd
5289 * indent-tabs-mode: t
5292 * ex: set ts=8 sts=4 sw=4 noet: