3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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);
155 PERL_SET_THX(my_perl);
159 #ifdef PERL_IMPLICIT_SYS
161 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
162 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
163 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
164 struct IPerlDir* ipD, struct IPerlSock* ipS,
165 struct IPerlProc* ipP)
167 PerlInterpreter *my_perl;
168 /* Newx() needs interpreter, so call malloc() instead */
169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
170 S_init_tls_and_interp(my_perl);
171 Zero(my_perl, 1, PerlInterpreter);
187 =head1 Embedding Functions
189 =for apidoc perl_alloc
191 Allocates a new Perl interpreter. See L<perlembed>.
199 PerlInterpreter *my_perl;
201 /* Newx() needs interpreter, so call malloc() instead */
202 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
204 S_init_tls_and_interp(my_perl);
205 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
207 #endif /* PERL_IMPLICIT_SYS */
210 =for apidoc perl_construct
212 Initializes a new Perl interpreter. See L<perlembed>.
218 perl_construct(pTHXx)
221 PERL_UNUSED_ARG(my_perl);
224 PL_perl_destruct_level = 1;
226 if (PL_perl_destruct_level > 0)
229 /* Init the real globals (and main thread)? */
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
233 PL_linestr = NEWSV(65,79);
234 sv_upgrade(PL_linestr,SVt_PVIV);
236 if (!SvREADONLY(&PL_sv_undef)) {
237 /* set read-only and try to insure than we wont see REFCNT==0
240 SvREADONLY_on(&PL_sv_undef);
241 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
243 sv_setpv(&PL_sv_no,PL_No);
244 /* value lookup in void context - happens to have the side effect
245 of caching the numeric forms. */
248 SvREADONLY_on(&PL_sv_no);
249 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_yes,PL_Yes);
254 SvREADONLY_on(&PL_sv_yes);
255 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
257 SvREADONLY_on(&PL_sv_placeholder);
258 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
261 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
262 PL_pidstatus = newHV();
265 PL_rs = newSVpvn("\n", 1);
270 PL_lex_state = LEX_NOTPARSING;
276 SET_NUMERIC_STANDARD();
278 #if defined(LOCAL_PATCH_COUNT)
279 PL_localpatches = local_patches; /* For possible -v */
282 #ifdef HAVE_INTERP_INTERN
286 PerlIO_init(aTHX); /* Hook to IO system */
288 PL_fdpid = newAV(); /* for remembering popen pids by fd */
289 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
290 PL_errors = newSVpvn("",0);
291 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
292 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
293 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
295 PL_regex_padav = newAV();
296 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
297 PL_regex_pad = AvARRAY(PL_regex_padav);
299 #ifdef USE_REENTRANT_API
300 Perl_reentrant_init(aTHX);
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
311 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
317 # ifdef USE_ENVIRON_ARRAY
318 PL_origenviron = environ;
322 /* Use sysconf(_SC_CLK_TCK) if available, if not
323 * available or if the sysconf() fails, use the HZ.
324 * BeOS has those, but returns the wrong value.
325 * The HZ if not originally defined has been by now
326 * been defined as CLK_TCK, if available. */
327 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
328 PL_clocktick = sysconf(_SC_CLK_TCK);
329 if (PL_clocktick <= 0)
333 PL_stashcache = newHV();
335 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
336 (int)PERL_VERSION, (int)PERL_SUBVERSION);
339 if (!PL_mmap_page_size) {
340 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
342 SETERRNO(0, SS_NORMAL);
344 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
346 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
348 if ((long) PL_mmap_page_size < 0) {
351 (void) SvUPGRADE(error, SVt_PV);
352 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
355 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
359 # ifdef HAS_GETPAGESIZE
360 PL_mmap_page_size = getpagesize();
362 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
363 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
367 if (PL_mmap_page_size <= 0)
368 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
369 (IV) PL_mmap_page_size);
371 #endif /* HAS_MMAP */
373 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
374 PL_timesbase.tms_utime = 0;
375 PL_timesbase.tms_stime = 0;
376 PL_timesbase.tms_cutime = 0;
377 PL_timesbase.tms_cstime = 0;
384 =for apidoc nothreadhook
386 Stub that provides thread hook for perl_destruct when there are
393 Perl_nothreadhook(pTHX)
398 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
400 Perl_dump_sv_child(pTHX_ SV *sv)
403 const int sock = PL_dumper_fd;
404 const int debug_fd = PerlIO_fileno(Perl_debug_log);
405 union control_un control;
408 struct cmsghdr *cmptr;
410 unsigned char buffer[256];
412 if(sock == -1 || debug_fd == -1)
415 PerlIO_flush(Perl_debug_log);
417 /* All these shenanigans are to pass a file descriptor over to our child for
418 it to dump out to. We can't let it hold open the file descriptor when it
419 forks, as the file descriptor it will dump to can turn out to be one end
420 of pipe that some other process will wait on for EOF. (So as it would
421 be open, the wait would be forever. */
423 msg.msg_control = control.control;
424 msg.msg_controllen = sizeof(control.control);
425 /* We're a connected socket so we don't need a destination */
431 cmptr = CMSG_FIRSTHDR(&msg);
432 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
433 cmptr->cmsg_level = SOL_SOCKET;
434 cmptr->cmsg_type = SCM_RIGHTS;
435 *((int *)CMSG_DATA(cmptr)) = 1;
437 vec[0].iov_base = (void*)&sv;
438 vec[0].iov_len = sizeof(sv);
439 got = sendmsg(sock, &msg, 0);
442 perror("Debug leaking scalars parent sendmsg failed");
445 if(got < sizeof(sv)) {
446 perror("Debug leaking scalars parent short sendmsg");
450 /* Return protocol is
452 unsigned char: length of location string (0 for empty)
453 unsigned char*: string (not terminated)
455 vec[0].iov_base = (void*)&returned_errno;
456 vec[0].iov_len = sizeof(returned_errno);
457 vec[1].iov_base = buffer;
460 got = readv(sock, vec, 2);
463 perror("Debug leaking scalars parent read failed");
464 PerlIO_flush(PerlIO_stderr());
467 if(got < sizeof(returned_errno) + 1) {
468 perror("Debug leaking scalars parent short read");
469 PerlIO_flush(PerlIO_stderr());
474 got = read(sock, buffer + 1, *buffer);
476 perror("Debug leaking scalars parent read 2 failed");
477 PerlIO_flush(PerlIO_stderr());
482 perror("Debug leaking scalars parent short read 2");
483 PerlIO_flush(PerlIO_stderr());
488 if (returned_errno || *buffer) {
489 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
490 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
491 returned_errno, strerror(returned_errno));
497 =for apidoc perl_destruct
499 Shuts down a Perl interpreter. See L<perlembed>.
508 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
510 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
514 PERL_UNUSED_ARG(my_perl);
516 /* wait for all pseudo-forked children to finish */
517 PERL_WAIT_FOR_CHILDREN;
519 destruct_level = PL_perl_destruct_level;
522 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
524 const int i = atoi(s);
525 if (destruct_level < i)
531 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
537 if (PL_endav && !PL_minus_c)
538 call_list(PL_scopestack_ix, PL_endav);
544 /* Need to flush since END blocks can produce output */
547 if (CALL_FPTR(PL_threadhook)(aTHX)) {
548 /* Threads hook has vetoed further cleanup */
549 return STATUS_NATIVE_EXPORT;
552 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
553 if (destruct_level != 0) {
554 /* Fork here to create a child. Our child's job is to preserve the
555 state of scalars prior to destruction, so that we can instruct it
556 to dump any scalars that we later find have leaked.
557 There's no subtlety in this code - it assumes POSIX, and it doesn't
561 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
562 perror("Debug leaking scalars socketpair failed");
568 perror("Debug leaking scalars fork failed");
572 /* We are the child */
573 const int sock = fd[1];
574 const int debug_fd = PerlIO_fileno(Perl_debug_log);
577 /* Our success message is an integer 0, and a char 0 */
578 static const char success[sizeof(int) + 1];
582 /* We need to close all other file descriptors otherwise we end up
583 with interesting hangs, where the parent closes its end of a
584 pipe, and sits waiting for (another) child to terminate. Only
585 that child never terminates, because it never gets EOF, because
586 we also have the far end of the pipe open. We even need to
587 close the debugging fd, because sometimes it happens to be one
588 end of a pipe, and a process is waiting on the other end for
589 EOF. Normally it would be closed at some point earlier in
590 destruction, but if we happen to cause the pipe to remain open,
591 EOF never occurs, and we get an infinite hang. Hence all the
592 games to pass in a file descriptor if it's actually needed. */
594 f = sysconf(_SC_OPEN_MAX);
596 where = "sysconf failed";
607 union control_un control;
610 struct cmsghdr *cmptr;
614 msg.msg_control = control.control;
615 msg.msg_controllen = sizeof(control.control);
616 /* We're a connected socket so we don't need a source */
620 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
622 vec[0].iov_base = (void*)⌖
623 vec[0].iov_len = sizeof(target);
625 got = recvmsg(sock, &msg, 0);
630 where = "recv failed";
633 if(got < sizeof(target)) {
634 where = "short recv";
638 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
642 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
643 where = "wrong cmsg_len";
646 if(cmptr->cmsg_level != SOL_SOCKET) {
647 where = "wrong cmsg_level";
650 if(cmptr->cmsg_type != SCM_RIGHTS) {
651 where = "wrong cmsg_type";
655 got_fd = *(int*)CMSG_DATA(cmptr);
656 /* For our last little bit of trickery, put the file descriptor
657 back into Perl_debug_log, as if we never actually closed it
659 if(got_fd != debug_fd) {
660 if (dup2(got_fd, debug_fd) == -1) {
667 PerlIO_flush(Perl_debug_log);
669 got = write(sock, &success, sizeof(success));
672 where = "write failed";
675 if(got < sizeof(success)) {
676 where = "short write";
683 int send_errno = errno;
684 unsigned char length = (unsigned char) strlen(where);
685 struct iovec failure[3] = {
686 {(void*)&send_errno, sizeof(send_errno)},
688 {(void*)where, length}
690 int got = writev(sock, failure, 3);
691 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
692 in the parent if we try to read from the socketpair after the
693 child has exited, even if there was data to read.
694 So sleep a bit to give the parent a fighting chance of
697 _exit((got == -1) ? errno : 0);
701 PL_dumper_fd = fd[0];
706 /* We must account for everything. */
708 /* Destroy the main CV and syntax tree */
709 /* Do this now, because destroying ops can cause new SVs to be generated
710 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
711 PL_curcop to point to a valid op from which the filename structure
713 PL_curcop = &PL_compiling;
715 /* ensure comppad/curpad to refer to main's pad */
716 if (CvPADLIST(PL_main_cv)) {
717 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
719 op_free(PL_main_root);
720 PL_main_root = Nullop;
722 PL_main_start = Nullop;
723 SvREFCNT_dec(PL_main_cv);
727 /* Tell PerlIO we are about to tear things apart in case
728 we have layers which are using resources that should
732 PerlIO_destruct(aTHX);
734 if (PL_sv_objcount) {
736 * Try to destruct global references. We do this first so that the
737 * destructors and destructees still exist. Some sv's might remain.
738 * Non-referenced objects are on their own.
744 /* unhook hooks which will soon be, or use, destroyed data */
745 SvREFCNT_dec(PL_warnhook);
746 PL_warnhook = Nullsv;
747 SvREFCNT_dec(PL_diehook);
750 /* call exit list functions */
751 while (PL_exitlistlen-- > 0)
752 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
754 Safefree(PL_exitlist);
759 if (destruct_level == 0){
761 DEBUG_P(debprofdump());
763 #if defined(PERLIO_LAYERS)
764 /* No more IO - including error messages ! */
765 PerlIO_cleanup(aTHX);
768 /* The exit() function will do everything that needs doing. */
769 return STATUS_NATIVE_EXPORT;
772 /* jettison our possibly duplicated environment */
773 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
774 * so we certainly shouldn't free it here
777 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
778 if (environ != PL_origenviron && !PL_use_safe_putenv
780 /* only main thread can free environ[0] contents */
781 && PL_curinterp == aTHX
787 for (i = 0; environ[i]; i++)
788 safesysfree(environ[i]);
790 /* Must use safesysfree() when working with environ. */
791 safesysfree(environ);
793 environ = PL_origenviron;
796 #endif /* !PERL_MICRO */
798 /* reset so print() ends up where we expect */
802 /* the syntax tree is shared between clones
803 * so op_free(PL_main_root) only ReREFCNT_dec's
804 * REGEXPs in the parent interpreter
805 * we need to manually ReREFCNT_dec for the clones
808 I32 i = AvFILLp(PL_regex_padav) + 1;
809 SV **ary = AvARRAY(PL_regex_padav);
814 if (SvFLAGS(resv) & SVf_BREAK) {
815 /* this is PL_reg_curpm, already freed
816 * flag is set in regexec.c:S_regtry
818 SvFLAGS(resv) &= ~SVf_BREAK;
820 else if(SvREPADTMP(resv)) {
821 SvREPADTMP_off(resv);
823 else if(SvIOKp(resv)) {
824 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
829 SvREFCNT_dec(PL_regex_padav);
830 PL_regex_padav = Nullav;
834 SvREFCNT_dec((SV*) PL_stashcache);
835 PL_stashcache = NULL;
837 /* loosen bonds of global variables */
840 (void)PerlIO_close(PL_rsfp);
844 /* Filters for program text */
845 SvREFCNT_dec(PL_rsfp_filters);
846 PL_rsfp_filters = Nullav;
849 PL_preprocess = FALSE;
855 PL_doswitches = FALSE;
856 PL_dowarn = G_WARN_OFF;
857 PL_doextract = FALSE;
858 PL_sawampersand = FALSE; /* must save all match strings */
861 Safefree(PL_inplace);
863 SvREFCNT_dec(PL_patchlevel);
866 SvREFCNT_dec(PL_e_script);
867 PL_e_script = Nullsv;
872 /* magical thingies */
874 SvREFCNT_dec(PL_ofs_sv); /* $, */
877 SvREFCNT_dec(PL_ors_sv); /* $\ */
880 SvREFCNT_dec(PL_rs); /* $/ */
883 PL_multiline = 0; /* $* */
884 Safefree(PL_osname); /* $^O */
887 SvREFCNT_dec(PL_statname);
888 PL_statname = Nullsv;
891 /* defgv, aka *_ should be taken care of elsewhere */
893 /* clean up after study() */
894 SvREFCNT_dec(PL_lastscream);
895 PL_lastscream = Nullsv;
896 Safefree(PL_screamfirst);
898 Safefree(PL_screamnext);
902 Safefree(PL_efloatbuf);
903 PL_efloatbuf = Nullch;
906 /* startup and shutdown function lists */
907 SvREFCNT_dec(PL_beginav);
908 SvREFCNT_dec(PL_beginav_save);
909 SvREFCNT_dec(PL_endav);
910 SvREFCNT_dec(PL_checkav);
911 SvREFCNT_dec(PL_checkav_save);
912 SvREFCNT_dec(PL_initav);
914 PL_beginav_save = Nullav;
917 PL_checkav_save = Nullav;
920 /* shortcuts just get cleared */
926 PL_argvoutgv = Nullgv;
928 PL_stderrgv = Nullgv;
929 PL_last_in_gv = Nullgv;
934 PL_DBsingle = Nullsv;
936 PL_DBsignal = Nullsv;
937 PL_DBassertion = Nullsv;
940 PL_debstash = Nullhv;
942 SvREFCNT_dec(PL_argvout_stack);
943 PL_argvout_stack = Nullav;
945 SvREFCNT_dec(PL_modglobal);
946 PL_modglobal = Nullhv;
947 SvREFCNT_dec(PL_preambleav);
948 PL_preambleav = Nullav;
949 SvREFCNT_dec(PL_subname);
951 SvREFCNT_dec(PL_linestr);
953 SvREFCNT_dec(PL_pidstatus);
954 PL_pidstatus = Nullhv;
955 SvREFCNT_dec(PL_toptarget);
956 PL_toptarget = Nullsv;
957 SvREFCNT_dec(PL_bodytarget);
958 PL_bodytarget = Nullsv;
959 PL_formtarget = Nullsv;
961 /* free locale stuff */
962 #ifdef USE_LOCALE_COLLATE
963 Safefree(PL_collation_name);
964 PL_collation_name = Nullch;
967 #ifdef USE_LOCALE_NUMERIC
968 Safefree(PL_numeric_name);
969 PL_numeric_name = Nullch;
970 SvREFCNT_dec(PL_numeric_radix_sv);
971 PL_numeric_radix_sv = Nullsv;
974 /* clear utf8 character classes */
975 SvREFCNT_dec(PL_utf8_alnum);
976 SvREFCNT_dec(PL_utf8_alnumc);
977 SvREFCNT_dec(PL_utf8_ascii);
978 SvREFCNT_dec(PL_utf8_alpha);
979 SvREFCNT_dec(PL_utf8_space);
980 SvREFCNT_dec(PL_utf8_cntrl);
981 SvREFCNT_dec(PL_utf8_graph);
982 SvREFCNT_dec(PL_utf8_digit);
983 SvREFCNT_dec(PL_utf8_upper);
984 SvREFCNT_dec(PL_utf8_lower);
985 SvREFCNT_dec(PL_utf8_print);
986 SvREFCNT_dec(PL_utf8_punct);
987 SvREFCNT_dec(PL_utf8_xdigit);
988 SvREFCNT_dec(PL_utf8_mark);
989 SvREFCNT_dec(PL_utf8_toupper);
990 SvREFCNT_dec(PL_utf8_totitle);
991 SvREFCNT_dec(PL_utf8_tolower);
992 SvREFCNT_dec(PL_utf8_tofold);
993 SvREFCNT_dec(PL_utf8_idstart);
994 SvREFCNT_dec(PL_utf8_idcont);
995 PL_utf8_alnum = Nullsv;
996 PL_utf8_alnumc = Nullsv;
997 PL_utf8_ascii = Nullsv;
998 PL_utf8_alpha = Nullsv;
999 PL_utf8_space = Nullsv;
1000 PL_utf8_cntrl = Nullsv;
1001 PL_utf8_graph = Nullsv;
1002 PL_utf8_digit = Nullsv;
1003 PL_utf8_upper = Nullsv;
1004 PL_utf8_lower = Nullsv;
1005 PL_utf8_print = Nullsv;
1006 PL_utf8_punct = Nullsv;
1007 PL_utf8_xdigit = Nullsv;
1008 PL_utf8_mark = Nullsv;
1009 PL_utf8_toupper = Nullsv;
1010 PL_utf8_totitle = Nullsv;
1011 PL_utf8_tolower = Nullsv;
1012 PL_utf8_tofold = Nullsv;
1013 PL_utf8_idstart = Nullsv;
1014 PL_utf8_idcont = Nullsv;
1016 if (!specialWARN(PL_compiling.cop_warnings))
1017 SvREFCNT_dec(PL_compiling.cop_warnings);
1018 PL_compiling.cop_warnings = Nullsv;
1019 if (!specialCopIO(PL_compiling.cop_io))
1020 SvREFCNT_dec(PL_compiling.cop_io);
1021 PL_compiling.cop_io = Nullsv;
1022 CopFILE_free(&PL_compiling);
1023 CopSTASH_free(&PL_compiling);
1025 /* Prepare to destruct main symbol table. */
1030 SvREFCNT_dec(PL_curstname);
1031 PL_curstname = Nullsv;
1033 /* clear queued errors */
1034 SvREFCNT_dec(PL_errors);
1038 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1039 if (PL_scopestack_ix != 0)
1040 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1041 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1042 (long)PL_scopestack_ix);
1043 if (PL_savestack_ix != 0)
1044 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1045 "Unbalanced saves: %ld more saves than restores\n",
1046 (long)PL_savestack_ix);
1047 if (PL_tmps_floor != -1)
1048 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1049 (long)PL_tmps_floor + 1);
1050 if (cxstack_ix != -1)
1051 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1052 (long)cxstack_ix + 1);
1055 /* Now absolutely destruct everything, somehow or other, loops or no. */
1056 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1057 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1059 /* the 2 is for PL_fdpid and PL_strtab */
1060 while (PL_sv_count > 2 && sv_clean_all())
1063 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1064 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1065 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1066 SvFLAGS(PL_strtab) |= SVt_PVHV;
1068 AvREAL_off(PL_fdpid); /* no surviving entries */
1069 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1072 #ifdef HAVE_INTERP_INTERN
1076 /* Destruct the global string table. */
1078 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1079 * so that sv_free() won't fail on them.
1080 * Now that the global string table is using a single hunk of memory
1081 * for both HE and HEK, we either need to explicitly unshare it the
1082 * correct way, or actually free things here.
1085 const I32 max = HvMAX(PL_strtab);
1086 HE **array = HvARRAY(PL_strtab);
1087 HE *hent = array[0];
1090 if (hent && ckWARN_d(WARN_INTERNAL)) {
1091 HE *next = HeNEXT(hent);
1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1093 "Unbalanced string table refcount: (%d) for \"%s\"",
1094 HeVAL(hent) - Nullsv, HeKEY(hent));
1101 hent = array[riter];
1106 HvARRAY(PL_strtab) = 0;
1107 HvTOTALKEYS(PL_strtab) = 0;
1108 HvFILL(PL_strtab) = 0;
1110 SvREFCNT_dec(PL_strtab);
1113 /* free the pointer tables used for cloning */
1114 ptr_table_free(PL_ptr_table);
1115 PL_ptr_table = (PTR_TBL_t*)NULL;
1118 /* free special SVs */
1120 SvREFCNT(&PL_sv_yes) = 0;
1121 sv_clear(&PL_sv_yes);
1122 SvANY(&PL_sv_yes) = NULL;
1123 SvFLAGS(&PL_sv_yes) = 0;
1125 SvREFCNT(&PL_sv_no) = 0;
1126 sv_clear(&PL_sv_no);
1127 SvANY(&PL_sv_no) = NULL;
1128 SvFLAGS(&PL_sv_no) = 0;
1132 for (i=0; i<=2; i++) {
1133 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1134 sv_clear(PERL_DEBUG_PAD(i));
1135 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1136 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1140 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1141 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1143 #ifdef DEBUG_LEAKING_SCALARS
1144 if (PL_sv_count != 0) {
1149 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1150 svend = &sva[SvREFCNT(sva)];
1151 for (sv = sva + 1; sv < svend; ++sv) {
1152 if (SvTYPE(sv) != SVTYPEMASK) {
1153 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1155 " refcnt=%"UVuf pTHX__FORMAT "\n"
1156 "\tallocated at %s:%d %s %s%s\n",
1157 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1158 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1160 sv->sv_debug_inpad ? "for" : "by",
1161 sv->sv_debug_optype ?
1162 PL_op_name[sv->sv_debug_optype]: "(none)",
1163 sv->sv_debug_cloned ? " (cloned)" : ""
1165 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1166 Perl_dump_sv_child(aTHX_ sv);
1172 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 /* Wait for up to 4 seconds for child to terminate.
1177 This seems to be the least effort way of timing out on reaping
1179 struct timeval waitfor = {4, 0};
1180 int sock = PL_dumper_fd;
1184 FD_SET(sock, &rset);
1185 select(sock + 1, &rset, NULL, NULL, &waitfor);
1186 waitpid(child, &status, WNOHANG);
1194 #if defined(PERLIO_LAYERS)
1195 /* No more IO - including error messages ! */
1196 PerlIO_cleanup(aTHX);
1199 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1200 as currently layers use it rather than Nullsv as a marker
1201 for no arg - and will try and SvREFCNT_dec it.
1203 SvREFCNT(&PL_sv_undef) = 0;
1204 SvREADONLY_off(&PL_sv_undef);
1206 Safefree(PL_origfilename);
1207 PL_origfilename = Nullch;
1208 Safefree(PL_reg_start_tmp);
1209 PL_reg_start_tmp = (char**)NULL;
1210 PL_reg_start_tmpl = 0;
1211 Safefree(PL_reg_curpm);
1212 Safefree(PL_reg_poscache);
1213 free_tied_hv_pool();
1214 Safefree(PL_op_mask);
1215 Safefree(PL_psig_ptr);
1216 PL_psig_ptr = (SV**)NULL;
1217 Safefree(PL_psig_name);
1218 PL_psig_name = (SV**)NULL;
1219 Safefree(PL_bitcount);
1220 PL_bitcount = Nullch;
1221 Safefree(PL_psig_pend);
1222 PL_psig_pend = (int*)NULL;
1223 PL_formfeed = Nullsv;
1225 PL_tainting = FALSE;
1226 PL_taint_warn = FALSE;
1227 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1230 DEBUG_P(debprofdump());
1232 #ifdef USE_REENTRANT_API
1233 Perl_reentrant_free(aTHX);
1238 /* As the absolutely last thing, free the non-arena SV for mess() */
1241 /* we know that type == SVt_PVMG */
1243 /* it could have accumulated taint magic */
1246 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1247 moremagic = mg->mg_moremagic;
1248 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1250 Safefree(mg->mg_ptr);
1254 /* we know that type >= SVt_PV */
1255 SvPV_free(PL_mess_sv);
1256 Safefree(SvANY(PL_mess_sv));
1257 Safefree(PL_mess_sv);
1258 PL_mess_sv = Nullsv;
1260 return STATUS_NATIVE_EXPORT;
1264 =for apidoc perl_free
1266 Releases a Perl interpreter. See L<perlembed>.
1274 #if defined(WIN32) || defined(NETWARE)
1275 # if defined(PERL_IMPLICIT_SYS)
1277 void *host = nw_internal_host;
1279 void *host = w32_internal_host;
1281 PerlMem_free(aTHXx);
1283 nw_delete_internal_host(host);
1285 win32_delete_internal_host(host);
1288 PerlMem_free(aTHXx);
1291 PerlMem_free(aTHXx);
1295 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1296 /* provide destructors to clean up the thread key when libperl is unloaded */
1297 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1299 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1300 #pragma fini "perl_fini"
1304 #if defined(__GNUC__)
1305 __attribute__((destructor))
1315 #endif /* THREADS */
1318 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1320 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1321 PL_exitlist[PL_exitlistlen].fn = fn;
1322 PL_exitlist[PL_exitlistlen].ptr = ptr;
1326 #ifdef HAS_PROCSELFEXE
1327 /* This is a function so that we don't hold on to MAXPATHLEN
1328 bytes of stack longer than necessary
1331 S_procself_val(pTHX_ SV *sv, const char *arg0)
1333 char buf[MAXPATHLEN];
1334 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1336 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1337 includes a spurious NUL which will cause $^X to fail in system
1338 or backticks (this will prevent extensions from being built and
1339 many tests from working). readlink is not meant to add a NUL.
1340 Normal readlink works fine.
1342 if (len > 0 && buf[len-1] == '\0') {
1346 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1347 returning the text "unknown" from the readlink rather than the path
1348 to the executable (or returning an error from the readlink). Any valid
1349 path has a '/' in it somewhere, so use that to validate the result.
1350 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1352 if (len > 0 && memchr(buf, '/', len)) {
1353 sv_setpvn(sv,buf,len);
1359 #endif /* HAS_PROCSELFEXE */
1362 S_set_caret_X(pTHX) {
1363 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1365 #ifdef HAS_PROCSELFEXE
1366 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1369 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1371 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1378 =for apidoc perl_parse
1380 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1386 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1393 PERL_UNUSED_VAR(my_perl);
1395 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1398 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1399 setuid perl scripts securely.\n");
1400 #endif /* IAMSUID */
1403 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1404 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1405 * This MUST be done before any hash stores or fetches take place.
1406 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1407 * yourself, it is your responsibility to provide a good random seed!
1408 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1409 if (!PL_rehash_seed_set)
1410 PL_rehash_seed = get_hash_seed();
1412 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1414 if (s && (atoi(s) == 1))
1415 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1417 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1423 /* Set PL_origalen be the sum of the contiguous argv[]
1424 * elements plus the size of the env in case that it is
1425 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1426 * as the maximum modifiable length of $0. In the worst case
1427 * the area we are able to modify is limited to the size of
1428 * the original argv[0]. (See below for 'contiguous', though.)
1430 const char *s = NULL;
1433 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1434 /* Do the mask check only if the args seem like aligned. */
1436 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1438 /* See if all the arguments are contiguous in memory. Note
1439 * that 'contiguous' is a loose term because some platforms
1440 * align the argv[] and the envp[]. If the arguments look
1441 * like non-aligned, assume that they are 'strictly' or
1442 * 'traditionally' contiguous. If the arguments look like
1443 * aligned, we just check that they are within aligned
1444 * PTRSIZE bytes. As long as no system has something bizarre
1445 * like the argv[] interleaved with some other data, we are
1446 * fine. (Did I just evoke Murphy's Law?) --jhi */
1447 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1449 for (i = 1; i < PL_origargc; i++) {
1450 if ((PL_origargv[i] == s + 1
1452 || PL_origargv[i] == s + 2
1457 (PL_origargv[i] > s &&
1459 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1469 /* Can we grab env area too to be used as the area for $0? */
1470 if (PL_origenviron) {
1471 if ((PL_origenviron[0] == s + 1
1473 || (PL_origenviron[0] == s + 9 && (s += 8))
1478 (PL_origenviron[0] > s &&
1479 PL_origenviron[0] <=
1480 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1484 s = PL_origenviron[0];
1487 my_setenv("NoNe SuCh", Nullch);
1488 /* Force copy of environment. */
1489 for (i = 1; PL_origenviron[i]; i++) {
1490 if (PL_origenviron[i] == s + 1
1493 (PL_origenviron[i] > s &&
1494 PL_origenviron[i] <=
1495 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1498 s = PL_origenviron[i];
1506 PL_origalen = s - PL_origargv[0] + 1;
1511 /* Come here if running an undumped a.out. */
1513 PL_origfilename = savepv(argv[0]);
1514 PL_do_undump = FALSE;
1515 cxstack_ix = -1; /* start label stack again */
1517 assert (!PL_tainted);
1519 S_set_caret_X(aTHX);
1521 init_postdump_symbols(argc,argv,env);
1526 op_free(PL_main_root);
1527 PL_main_root = Nullop;
1529 PL_main_start = Nullop;
1530 SvREFCNT_dec(PL_main_cv);
1531 PL_main_cv = Nullcv;
1534 oldscope = PL_scopestack_ix;
1535 PL_dowarn = G_WARN_OFF;
1540 parse_body(env,xsinit);
1542 call_list(oldscope, PL_checkav);
1549 /* my_exit() was called */
1550 while (PL_scopestack_ix > oldscope)
1553 PL_curstash = PL_defstash;
1555 call_list(oldscope, PL_checkav);
1556 ret = STATUS_NATIVE_EXPORT;
1559 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1568 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1571 int argc = PL_origargc;
1572 char **argv = PL_origargv;
1573 const char *scriptname = NULL;
1574 VOL bool dosearch = FALSE;
1575 const char *validarg = "";
1578 const char *cddir = Nullch;
1579 #ifdef USE_SITECUSTOMIZE
1580 bool minus_f = FALSE;
1585 sv_setpvn(PL_linestr,"",0);
1586 sv = newSVpvn("",0); /* first used for -I flags */
1590 for (argc--,argv++; argc > 0; argc--,argv++) {
1591 if (argv[0][0] != '-' || !argv[0][1])
1595 validarg = " PHOOEY ";
1599 * Can we rely on the kernel to start scripts with argv[1] set to
1600 * contain all #! line switches (the whole line)? (argv[0] is set to
1601 * the interpreter name, argv[2] to the script name; argv[3] and
1602 * above may contain other arguments.)
1609 #ifndef PERL_STRICT_CR
1634 if ((s = moreswitches(s)))
1639 CHECK_MALLOC_TOO_LATE_FOR('t');
1640 if( !PL_tainting ) {
1641 PL_taint_warn = TRUE;
1647 CHECK_MALLOC_TOO_LATE_FOR('T');
1649 PL_taint_warn = FALSE;
1654 #ifdef MACOS_TRADITIONAL
1655 /* ignore -e for Dev:Pseudo argument */
1656 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1661 PL_e_script = newSVpvn("",0);
1662 filter_add(read_e_script, NULL);
1665 sv_catpv(PL_e_script, s);
1667 sv_catpv(PL_e_script, argv[1]);
1671 Perl_croak(aTHX_ "No code specified for -e");
1672 sv_catpv(PL_e_script, "\n");
1676 #ifdef USE_SITECUSTOMIZE
1682 case 'I': /* -I handled both here and in moreswitches() */
1684 if (!*++s && (s=argv[1]) != Nullch) {
1688 STRLEN len = strlen(s);
1689 const char * const p = savepvn(s, len);
1690 incpush(p, TRUE, TRUE, FALSE, FALSE);
1691 sv_catpvn(sv, "-I", 2);
1692 sv_catpvn(sv, p, len);
1693 sv_catpvn(sv, " ", 1);
1697 Perl_croak(aTHX_ "No directory specified for -I");
1701 PL_preprocess = TRUE;
1714 PL_preambleav = newAV();
1715 av_push(PL_preambleav,
1716 newSVpv("use Config;",0));
1720 opts_prog = newSVpv("print Config::myconfig(),",0);
1722 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1724 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1726 opts = SvCUR(opts_prog);
1728 sv_catpv(opts_prog,"\" Compile-time options:");
1730 sv_catpv(opts_prog," DEBUGGING");
1732 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1733 sv_catpv(opts_prog," DEBUG_LEAKING_SCALARS_FORK_DUMP");
1735 # ifdef FAKE_THREADS
1736 sv_catpv(opts_prog," FAKE_THREADS");
1738 # ifdef MULTIPLICITY
1739 sv_catpv(opts_prog," MULTIPLICITY");
1742 sv_catpv(opts_prog," MYMALLOC");
1744 # ifdef PERL_DONT_CREATE_GVSV
1745 sv_catpv(opts_prog," PERL_DONT_CREATE_GVSV");
1747 # ifdef PERL_GLOBAL_STRUCT
1748 sv_catpv(opts_prog," PERL_GLOBAL_STRUCT");
1750 # ifdef PERL_IMPLICIT_CONTEXT
1751 sv_catpv(opts_prog," PERL_IMPLICIT_CONTEXT");
1753 # ifdef PERL_IMPLICIT_SYS
1754 sv_catpv(opts_prog," PERL_IMPLICIT_SYS");
1756 # ifdef PERL_MALLOC_WRAP
1757 sv_catpv(opts_prog," PERL_MALLOC_WRAP");
1759 # ifdef PERL_NEED_APPCTX
1760 sv_catpv(opts_prog," PERL_NEED_APPCTX");
1762 # ifdef PERL_NEED_TIMESBASE
1763 sv_catpv(opts_prog," PERL_NEED_TIMESBASE");
1765 # ifdef PERL_OLD_COPY_ON_WRITE
1766 sv_catpv(opts_prog," PERL_OLD_COPY_ON_WRITE");
1768 # ifdef PL_OP_SLAB_ALLOC
1769 sv_catpv(opts_prog," PL_OP_SLAB_ALLOC");
1771 # ifdef THREADS_HAVE_PIDS
1772 sv_catpv(opts_prog," THREADS_HAVE_PIDS");
1774 # ifdef USE_5005THREADS
1775 sv_catpv(opts_prog," USE_5005THREADS");
1777 # ifdef USE_64_BIT_ALL
1778 sv_catpv(opts_prog," USE_64_BIT_ALL");
1780 # ifdef USE_64_BIT_INT
1781 sv_catpv(opts_prog," USE_64_BIT_INT");
1783 # ifdef USE_ITHREADS
1784 sv_catpv(opts_prog," USE_ITHREADS");
1786 # ifdef USE_LARGE_FILES
1787 sv_catpv(opts_prog," USE_LARGE_FILES");
1789 # ifdef USE_LONG_DOUBLE
1790 sv_catpv(opts_prog," USE_LONG_DOUBLE");
1793 sv_catpv(opts_prog," USE_PERLIO");
1795 # ifdef USE_REENTRANT_API
1796 sv_catpv(opts_prog," USE_REENTRANT_API");
1799 sv_catpv(opts_prog," USE_SFIO");
1801 # ifdef USE_SITECUSTOMIZE
1802 sv_catpv(opts_prog," USE_SITECUSTOMIZE");
1805 sv_catpv(opts_prog," USE_SOCKS");
1808 while (SvCUR(opts_prog) > opts+76) {
1809 /* find last space after "options: " and before col 76
1813 char *pv = SvPV_nolen(opts_prog);
1814 const char c = pv[opts+76];
1816 space = strrchr(pv+opts+26, ' ');
1818 if (!space) break; /* "Can't happen" */
1820 /* break the line before that space */
1823 sv_insert(opts_prog, opts, 0,
1827 sv_catpv(opts_prog,"\\n\",");
1829 #if defined(LOCAL_PATCH_COUNT)
1830 if (LOCAL_PATCH_COUNT > 0) {
1833 "\" Locally applied patches:\\n\",");
1834 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1835 if (PL_localpatches[i])
1836 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1837 0, PL_localpatches[i], 0);
1841 Perl_sv_catpvf(aTHX_ opts_prog,
1842 "\" Built under %s\\n\"",OSNAME);
1845 Perl_sv_catpvf(aTHX_ opts_prog,
1846 ",\" Compiled at %s %s\\n\"",__DATE__,
1849 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1853 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1854 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1855 "sort grep {/^PERL/} keys %ENV; ");
1858 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1861 "print \" \\%ENV:\\n @env\\n\" if @env;"
1862 "print \" \\@INC:\\n @INC\\n\";");
1866 opts_prog = Perl_newSVpvf(aTHX_
1867 "Config::config_vars(qw%c%s%c)",
1871 av_push(PL_preambleav, opts_prog);
1872 /* don't look for script or read stdin */
1873 scriptname = BIT_BUCKET;
1877 PL_doextract = TRUE;
1885 if (!*++s || isSPACE(*s)) {
1889 /* catch use of gnu style long options */
1890 if (strEQ(s, "version")) {
1894 if (strEQ(s, "help")) {
1901 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1907 #ifndef SECURE_INTERNAL_GETENV
1910 (s = PerlEnv_getenv("PERL5OPT")))
1912 const char *popt = s;
1915 if (*s == '-' && *(s+1) == 'T') {
1916 CHECK_MALLOC_TOO_LATE_FOR('T');
1918 PL_taint_warn = FALSE;
1921 char *popt_copy = Nullch;
1934 if (!strchr("DIMUdmtwA", *s))
1935 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1939 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1940 s = popt_copy + (s - popt);
1941 d = popt_copy + (d - popt);
1948 if( !PL_tainting ) {
1949 PL_taint_warn = TRUE;
1959 #ifdef USE_SITECUSTOMIZE
1962 PL_preambleav = newAV();
1963 av_unshift(PL_preambleav, 1);
1964 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1968 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1969 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1973 scriptname = argv[0];
1976 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1978 else if (scriptname == Nullch) {
1980 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1986 /* Set $^X early so that it can be used for relocatable paths in @INC */
1987 assert (!PL_tainted);
1989 S_set_caret_X(aTHX);
1993 open_script(scriptname,dosearch,sv);
1995 validate_suid(validarg, scriptname);
1998 #if defined(SIGCHLD) || defined(SIGCLD)
2001 # define SIGCHLD SIGCLD
2003 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2004 if (sigstate == (Sighandler_t) SIG_IGN) {
2005 if (ckWARN(WARN_SIGNAL))
2006 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2007 "Can't ignore signal CHLD, forcing to default");
2008 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2014 #ifdef MACOS_TRADITIONAL
2015 if (PL_doextract || gMacPerl_AlwaysExtract) {
2020 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2021 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2025 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2026 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2027 CvUNIQUE_on(PL_compcv);
2029 CvPADLIST(PL_compcv) = pad_new(0);
2030 #ifdef USE_5005THREADS
2031 CvOWNER(PL_compcv) = 0;
2032 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2033 MUTEX_INIT(CvMUTEXP(PL_compcv));
2034 #endif /* USE_5005THREADS */
2037 boot_core_UNIVERSAL();
2038 boot_core_xsutils();
2041 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2043 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2049 # ifdef HAS_SOCKS5_INIT
2050 socks5_init(argv[0]);
2056 init_predump_symbols();
2057 /* init_postdump_symbols not currently designed to be called */
2058 /* more than once (ENV isn't cleared first, for example) */
2059 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2061 init_postdump_symbols(argc,argv,env);
2063 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2064 * or explicitly in some platforms.
2065 * locale.c:Perl_init_i18nl10n() if the environment
2066 * look like the user wants to use UTF-8. */
2067 #if defined(SYMBIAN)
2068 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2071 /* Requires init_predump_symbols(). */
2072 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2077 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2078 * and the default open disciplines. */
2079 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2080 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2082 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2083 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2084 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2086 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2087 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2088 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2090 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2091 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2092 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2093 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2094 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2097 sv_setpvn(sv, ":utf8\0:utf8", 11);
2099 sv_setpvn(sv, ":utf8\0", 6);
2102 sv_setpvn(sv, "\0:utf8", 6);
2108 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2109 if (strEQ(s, "unsafe"))
2110 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2111 else if (strEQ(s, "safe"))
2112 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2114 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2119 /* now parse the script */
2121 SETERRNO(0,SS_NORMAL);
2123 #ifdef MACOS_TRADITIONAL
2124 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2126 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2128 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2129 MacPerl_MPWFileName(PL_origfilename));
2133 if (yyparse() || PL_error_count) {
2135 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2137 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2142 CopLINE_set(PL_curcop, 0);
2143 PL_curstash = PL_defstash;
2144 PL_preprocess = FALSE;
2146 SvREFCNT_dec(PL_e_script);
2147 PL_e_script = Nullsv;
2154 SAVECOPFILE(PL_curcop);
2155 SAVECOPLINE(PL_curcop);
2156 gv_check(PL_defstash);
2163 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2164 dump_mstats("after compilation:");
2173 =for apidoc perl_run
2175 Tells a Perl interpreter to run. See L<perlembed>.
2187 PERL_UNUSED_ARG(my_perl);
2189 oldscope = PL_scopestack_ix;
2197 cxstack_ix = -1; /* start context stack again */
2199 case 0: /* normal completion */
2203 case 2: /* my_exit() */
2204 while (PL_scopestack_ix > oldscope)
2207 PL_curstash = PL_defstash;
2208 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2209 PL_endav && !PL_minus_c)
2210 call_list(oldscope, PL_endav);
2212 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2213 dump_mstats("after execution: ");
2215 ret = STATUS_NATIVE_EXPORT;
2219 POPSTACK_TO(PL_mainstack);
2222 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2234 S_run_body(pTHX_ I32 oldscope)
2236 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2237 PL_sawampersand ? "Enabling" : "Omitting"));
2239 if (!PL_restartop) {
2240 DEBUG_x(dump_all());
2243 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2245 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2249 #ifdef MACOS_TRADITIONAL
2250 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2251 (gMacPerl_ErrorFormat ? "# " : ""),
2252 MacPerl_MPWFileName(PL_origfilename));
2254 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2258 if (PERLDB_SINGLE && PL_DBsingle)
2259 sv_setiv(PL_DBsingle, 1);
2261 call_list(oldscope, PL_initav);
2267 PL_op = PL_restartop;
2271 else if (PL_main_start) {
2272 CvDEPTH(PL_main_cv) = 1;
2273 PL_op = PL_main_start;
2281 =head1 SV Manipulation Functions
2283 =for apidoc p||get_sv
2285 Returns the SV of the specified Perl scalar. If C<create> is set and the
2286 Perl variable does not exist then it will be created. If C<create> is not
2287 set and the variable does not exist then NULL is returned.
2293 Perl_get_sv(pTHX_ const char *name, I32 create)
2296 #ifdef USE_5005THREADS
2297 if (name[1] == '\0' && !isALPHA(name[0])) {
2298 PADOFFSET tmp = find_threadsv(name);
2299 if (tmp != NOT_IN_PAD)
2300 return THREADSV(tmp);
2302 #endif /* USE_5005THREADS */
2303 gv = gv_fetchpv(name, create, SVt_PV);
2310 =head1 Array Manipulation Functions
2312 =for apidoc p||get_av
2314 Returns the AV of the specified Perl array. If C<create> is set and the
2315 Perl variable does not exist then it will be created. If C<create> is not
2316 set and the variable does not exist then NULL is returned.
2322 Perl_get_av(pTHX_ const char *name, I32 create)
2324 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2333 =head1 Hash Manipulation Functions
2335 =for apidoc p||get_hv
2337 Returns the HV of the specified Perl hash. 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_hv(pTHX_ const char *name, I32 create)
2347 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2356 =head1 CV Manipulation Functions
2358 =for apidoc p||get_cv
2360 Returns the CV of the specified Perl subroutine. If C<create> is set and
2361 the Perl subroutine does not exist then it will be declared (which has the
2362 same effect as saying C<sub name;>). If C<create> is not set and the
2363 subroutine does not exist then NULL is returned.
2369 Perl_get_cv(pTHX_ const char *name, I32 create)
2371 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2372 /* XXX unsafe for threads if eval_owner isn't held */
2373 /* XXX this is probably not what they think they're getting.
2374 * It has the same effect as "sub name;", i.e. just a forward
2376 if (create && !GvCVu(gv))
2377 return newSUB(start_subparse(FALSE, 0),
2378 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2386 /* Be sure to refetch the stack pointer after calling these routines. */
2390 =head1 Callback Functions
2392 =for apidoc p||call_argv
2394 Performs a callback to the specified Perl sub. See L<perlcall>.
2400 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2402 /* See G_* flags in cop.h */
2403 /* null terminated arg list */
2410 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2415 return call_pv(sub_name, flags);
2419 =for apidoc p||call_pv
2421 Performs a callback to the specified Perl sub. See L<perlcall>.
2427 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2428 /* name of the subroutine */
2429 /* See G_* flags in cop.h */
2431 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2435 =for apidoc p||call_method
2437 Performs a callback to the specified Perl method. The blessed object must
2438 be on the stack. See L<perlcall>.
2444 Perl_call_method(pTHX_ const char *methname, I32 flags)
2445 /* name of the subroutine */
2446 /* See G_* flags in cop.h */
2448 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2451 /* May be called with any of a CV, a GV, or an SV containing the name. */
2453 =for apidoc p||call_sv
2455 Performs a callback to the Perl sub whose name is in the SV. See
2462 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2463 /* See G_* flags in cop.h */
2466 LOGOP myop; /* fake syntax tree node */
2469 volatile I32 retval = 0;
2471 bool oldcatch = CATCH_GET;
2476 if (flags & G_DISCARD) {
2481 Zero(&myop, 1, LOGOP);
2482 myop.op_next = Nullop;
2483 if (!(flags & G_NOARGS))
2484 myop.op_flags |= OPf_STACKED;
2485 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2486 (flags & G_ARRAY) ? OPf_WANT_LIST :
2491 EXTEND(PL_stack_sp, 1);
2492 *++PL_stack_sp = sv;
2494 oldscope = PL_scopestack_ix;
2496 if (PERLDB_SUB && PL_curstash != PL_debstash
2497 /* Handle first BEGIN of -d. */
2498 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2499 /* Try harder, since this may have been a sighandler, thus
2500 * curstash may be meaningless. */
2501 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2502 && !(flags & G_NODEBUG))
2503 PL_op->op_private |= OPpENTERSUB_DB;
2505 if (flags & G_METHOD) {
2506 Zero(&method_op, 1, UNOP);
2507 method_op.op_next = PL_op;
2508 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2509 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2510 PL_op = (OP*)&method_op;
2513 if (!(flags & G_EVAL)) {
2515 call_body((OP*)&myop, FALSE);
2516 retval = PL_stack_sp - (PL_stack_base + oldmark);
2517 CATCH_SET(oldcatch);
2520 myop.op_other = (OP*)&myop;
2522 /* we're trying to emulate pp_entertry() here */
2524 register PERL_CONTEXT *cx;
2525 const I32 gimme = GIMME_V;
2530 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2532 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2534 PL_in_eval = EVAL_INEVAL;
2535 if (flags & G_KEEPERR)
2536 PL_in_eval |= EVAL_KEEPERR;
2538 sv_setpvn(ERRSV,"",0);
2546 call_body((OP*)&myop, FALSE);
2547 retval = PL_stack_sp - (PL_stack_base + oldmark);
2548 if (!(flags & G_KEEPERR))
2549 sv_setpvn(ERRSV,"",0);
2555 /* my_exit() was called */
2556 PL_curstash = PL_defstash;
2559 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2560 Perl_croak(aTHX_ "Callback called exit");
2565 PL_op = PL_restartop;
2569 PL_stack_sp = PL_stack_base + oldmark;
2570 if (flags & G_ARRAY)
2574 *++PL_stack_sp = &PL_sv_undef;
2579 if (PL_scopestack_ix > oldscope) {
2583 register PERL_CONTEXT *cx;
2590 PERL_UNUSED_VAR(newsp);
2591 PERL_UNUSED_VAR(gimme);
2592 PERL_UNUSED_VAR(optype);
2597 if (flags & G_DISCARD) {
2598 PL_stack_sp = PL_stack_base + oldmark;
2608 S_call_body(pTHX_ const OP *myop, bool is_eval)
2610 if (PL_op == myop) {
2612 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2614 PL_op = Perl_pp_entersub(aTHX); /* this does */
2620 /* Eval a string. The G_EVAL flag is always assumed. */
2623 =for apidoc p||eval_sv
2625 Tells Perl to C<eval> the string in the SV.
2631 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2633 /* See G_* flags in cop.h */
2636 UNOP myop; /* fake syntax tree node */
2637 volatile I32 oldmark = SP - PL_stack_base;
2638 volatile I32 retval = 0;
2643 if (flags & G_DISCARD) {
2650 Zero(PL_op, 1, UNOP);
2651 EXTEND(PL_stack_sp, 1);
2652 *++PL_stack_sp = sv;
2654 if (!(flags & G_NOARGS))
2655 myop.op_flags = OPf_STACKED;
2656 myop.op_next = Nullop;
2657 myop.op_type = OP_ENTEREVAL;
2658 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2659 (flags & G_ARRAY) ? OPf_WANT_LIST :
2661 if (flags & G_KEEPERR)
2662 myop.op_flags |= OPf_SPECIAL;
2664 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2665 * before a PUSHEVAL, which corrupts the stack after a croak */
2666 TAINT_PROPER("eval_sv()");
2672 call_body((OP*)&myop,TRUE);
2673 retval = PL_stack_sp - (PL_stack_base + oldmark);
2674 if (!(flags & G_KEEPERR))
2675 sv_setpvn(ERRSV,"",0);
2681 /* my_exit() was called */
2682 PL_curstash = PL_defstash;
2685 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2686 Perl_croak(aTHX_ "Callback called exit");
2691 PL_op = PL_restartop;
2695 PL_stack_sp = PL_stack_base + oldmark;
2696 if (flags & G_ARRAY)
2700 *++PL_stack_sp = &PL_sv_undef;
2706 if (flags & G_DISCARD) {
2707 PL_stack_sp = PL_stack_base + oldmark;
2717 =for apidoc p||eval_pv
2719 Tells Perl to C<eval> the given string and return an SV* result.
2725 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2728 SV* sv = newSVpv(p, 0);
2730 eval_sv(sv, G_SCALAR);
2737 if (croak_on_error && SvTRUE(ERRSV)) {
2738 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2744 /* Require a module. */
2747 =head1 Embedding Functions
2749 =for apidoc p||require_pv
2751 Tells Perl to C<require> the file named by the string argument. It is
2752 analogous to the Perl code C<eval "require '$file'">. It's even
2753 implemented that way; consider using load_module instead.
2758 Perl_require_pv(pTHX_ const char *pv)
2762 PUSHSTACKi(PERLSI_REQUIRE);
2764 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2765 eval_sv(sv_2mortal(sv), G_DISCARD);
2771 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2775 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2776 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2780 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2782 /* This message really ought to be max 23 lines.
2783 * Removed -h because the user already knows that option. Others? */
2785 static const char * const usage_msg[] = {
2786 "-0[octal] specify record separator (\\0, if no argument)",
2787 "-A[mod][=pattern] activate all/given assertions",
2788 "-a autosplit mode with -n or -p (splits $_ into @F)",
2789 "-C[number/list] enables the listed Unicode features",
2790 "-c check syntax only (runs BEGIN and CHECK blocks)",
2791 "-d[:debugger] run program under debugger",
2792 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2793 "-e program one line of program (several -e's allowed, omit programfile)",
2794 "-f don't do $sitelib/sitecustomize.pl at startup",
2795 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2796 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2797 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2798 "-l[octal] enable line ending processing, specifies line terminator",
2799 "-[mM][-]module execute \"use/no module...\" before executing program",
2800 "-n assume \"while (<>) { ... }\" loop around program",
2801 "-p assume loop like -n but print line also, like sed",
2802 "-P run program through C preprocessor before compilation",
2803 "-s enable rudimentary parsing for switches after programfile",
2804 "-S look for programfile using PATH environment variable",
2805 "-t enable tainting warnings",
2806 "-T enable tainting checks",
2807 "-u dump core after parsing program",
2808 "-U allow unsafe operations",
2809 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2810 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2811 "-w enable many useful warnings (RECOMMENDED)",
2812 "-W enable all warnings",
2813 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2814 "-X disable all warnings",
2818 const char * const *p = usage_msg;
2820 PerlIO_printf(PerlIO_stdout(),
2821 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2824 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2827 /* convert a string of -D options (or digits) into an int.
2828 * sets *s to point to the char after the options */
2832 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2834 static const char * const usage_msgd[] = {
2835 " Debugging flag values: (see also -d)",
2836 " p Tokenizing and parsing (with v, displays parse stack)",
2837 " s Stack snapshots (with v, displays all stacks)",
2838 " l Context (loop) stack processing",
2839 " t Trace execution",
2840 " o Method and overloading resolution",
2841 " c String/numeric conversions",
2842 " P Print profiling info, preprocessor command for -P, source file input state",
2843 " m Memory allocation",
2844 " f Format processing",
2845 " r Regular expression parsing and execution",
2846 " x Syntax tree dump",
2847 " u Tainting checks",
2848 " H Hash dump -- usurps values()",
2849 " X Scratchpad allocation",
2851 " S Thread synchronization",
2853 " R Include reference counts of dumped variables (eg when using -Ds)",
2854 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2855 " v Verbose: use in conjunction with other flags",
2857 " A Consistency checks on internal structures",
2858 " q quiet - currently only suppresses the 'EXECUTING' message",
2863 /* if adding extra options, remember to update DEBUG_MASK */
2864 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2866 for (; isALNUM(**s); (*s)++) {
2867 const char *d = strchr(debopts,**s);
2869 i |= 1 << (d - debopts);
2870 else if (ckWARN_d(WARN_DEBUGGING))
2871 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2872 "invalid option -D%c, use -D'' to see choices\n", **s);
2875 else if (isDIGIT(**s)) {
2877 for (; isALNUM(**s); (*s)++) ;
2879 else if (givehelp) {
2880 char **p = (char **)usage_msgd;
2881 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2884 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2885 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2886 "-Dp not implemented on this platform\n");
2892 /* This routine handles any switches that can be given during run */
2895 Perl_moreswitches(pTHX_ char *s)
2906 SvREFCNT_dec(PL_rs);
2907 if (s[1] == 'x' && s[2]) {
2908 const char *e = s+=2;
2914 flags = PERL_SCAN_SILENT_ILLDIGIT;
2915 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2916 if (s + numlen < e) {
2917 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2921 PL_rs = newSVpvn("", 0);
2922 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2923 tmps = (U8*)SvPVX(PL_rs);
2924 uvchr_to_utf8(tmps, rschar);
2925 SvCUR_set(PL_rs, UNISKIP(rschar));
2930 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2931 if (rschar & ~((U8)~0))
2932 PL_rs = &PL_sv_undef;
2933 else if (!rschar && numlen >= 2)
2934 PL_rs = newSVpvn("", 0);
2936 char ch = (char)rschar;
2937 PL_rs = newSVpvn(&ch, 1);
2940 sv_setsv(get_sv("/", TRUE), PL_rs);
2945 PL_unicode = parse_unicode_opts( (const char **)&s );
2950 while (*s && !isSPACE(*s)) ++s;
2952 PL_splitstr = savepv(PL_splitstr);
2966 /* -dt indicates to the debugger that threads will be used */
2967 if (*s == 't' && !isALNUM(s[1])) {
2969 my_setenv("PERL5DB_THREADED", "1");
2972 /* The following permits -d:Mod to accepts arguments following an =
2973 in the fashion that -MSome::Mod does. */
2974 if (*s == ':' || *s == '=') {
2977 sv = newSVpv("use Devel::", 0);
2979 /* We now allow -d:Module=Foo,Bar */
2980 while(isALNUM(*s) || *s==':') ++s;
2982 sv_catpv(sv, start);
2984 sv_catpvn(sv, start, s-start);
2985 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
2988 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2991 PL_perldb = PERLDB_ALL;
3000 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3001 #else /* !DEBUGGING */
3002 if (ckWARN_d(WARN_DEBUGGING))
3003 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3004 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3005 for (s++; isALNUM(*s); s++) ;
3010 usage(PL_origargv[0]);
3013 Safefree(PL_inplace);
3014 #if defined(__CYGWIN__) /* do backup extension automagically */
3015 if (*(s+1) == '\0') {
3016 PL_inplace = savepv(".bak");
3019 #endif /* __CYGWIN__ */
3020 PL_inplace = savepv(s+1);
3021 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3025 if (*s == '-') /* Additional switches on #! line. */
3029 case 'I': /* -I handled both here and in parse_body() */
3032 while (*s && isSPACE(*s))
3037 /* ignore trailing spaces (possibly followed by other switches) */
3039 for (e = p; *e && !isSPACE(*e); e++) ;
3043 } while (*p && *p != '-');
3044 e = savepvn(s, e-s);
3045 incpush(e, TRUE, TRUE, FALSE, FALSE);
3052 Perl_croak(aTHX_ "No directory specified for -I");
3058 SvREFCNT_dec(PL_ors_sv);
3064 PL_ors_sv = newSVpvn("\n",1);
3065 numlen = 3 + (*s == '0');
3066 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3070 if (RsPARA(PL_rs)) {
3071 PL_ors_sv = newSVpvn("\n\n",2);
3074 PL_ors_sv = newSVsv(PL_rs);
3081 PL_preambleav = newAV();
3085 SV *sv = newSVpv("use assertions::activate", 24);
3086 while(isALNUM(*s) || *s == ':') ++s;
3088 sv_catpvn(sv, "::", 2);
3089 sv_catpvn(sv, start, s-start);
3092 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3095 else if (*s != '\0') {
3096 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3098 av_push(PL_preambleav, sv);
3102 forbid_setid("-M"); /* XXX ? */
3105 forbid_setid("-m"); /* XXX ? */
3109 const char *use = "use ";
3110 /* -M-foo == 'no foo' */
3111 /* Leading space on " no " is deliberate, to make both
3112 possibilities the same length. */
3113 if (*s == '-') { use = " no "; ++s; }
3114 sv = newSVpvn(use,4);
3116 /* We allow -M'Module qw(Foo Bar)' */
3117 while(isALNUM(*s) || *s==':') ++s;
3119 sv_catpv(sv, start);
3120 if (*(start-1) == 'm') {
3122 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3123 sv_catpv( sv, " ()");
3127 Perl_croak(aTHX_ "Module name required with -%c option",
3129 sv_catpvn(sv, start, s-start);
3130 sv_catpv(sv, " split(/,/,q");
3131 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3133 sv_catpvn(sv, "\0)", 2);
3137 PL_preambleav = newAV();
3138 av_push(PL_preambleav, sv);
3141 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3153 PL_doswitches = TRUE;
3167 #ifdef MACOS_TRADITIONAL
3168 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3170 PL_do_undump = TRUE;
3178 if (!sv_derived_from(PL_patchlevel, "version"))
3179 (void *)upg_version(PL_patchlevel);
3181 PerlIO_printf(PerlIO_stdout(),
3182 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3183 vstringify(PL_patchlevel),
3186 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3187 PerlIO_printf(PerlIO_stdout(),
3188 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3189 vstringify(PL_patchlevel)));
3190 PerlIO_printf(PerlIO_stdout(),
3191 Perl_form(aTHX_ " built under %s at %s %s\n",
3192 OSNAME, __DATE__, __TIME__));
3193 PerlIO_printf(PerlIO_stdout(),
3194 Perl_form(aTHX_ " OS Specific Release: %s\n",
3198 #if defined(LOCAL_PATCH_COUNT)
3199 if (LOCAL_PATCH_COUNT > 0)
3200 PerlIO_printf(PerlIO_stdout(),
3201 "\n(with %d registered patch%s, "
3202 "see perl -V for more detail)",
3203 (int)LOCAL_PATCH_COUNT,
3204 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3207 PerlIO_printf(PerlIO_stdout(),
3208 "\n\nCopyright 1987-2005, Larry Wall\n");
3209 #ifdef MACOS_TRADITIONAL
3210 PerlIO_printf(PerlIO_stdout(),
3211 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3212 "maintained by Chris Nandor\n");
3215 PerlIO_printf(PerlIO_stdout(),
3216 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3219 PerlIO_printf(PerlIO_stdout(),
3220 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3221 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3224 PerlIO_printf(PerlIO_stdout(),
3225 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3226 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3229 PerlIO_printf(PerlIO_stdout(),
3230 "atariST series port, ++jrb bammi@cadence.com\n");
3233 PerlIO_printf(PerlIO_stdout(),
3234 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3237 PerlIO_printf(PerlIO_stdout(),
3238 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3241 PerlIO_printf(PerlIO_stdout(),
3242 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3245 PerlIO_printf(PerlIO_stdout(),
3246 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3249 PerlIO_printf(PerlIO_stdout(),
3250 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3253 PerlIO_printf(PerlIO_stdout(),
3254 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3257 PerlIO_printf(PerlIO_stdout(),
3258 "MiNT port by Guido Flohr, 1997-1999\n");
3261 PerlIO_printf(PerlIO_stdout(),
3262 "EPOC port by Olaf Flebbe, 1999-2002\n");
3265 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3266 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "Symbian port by Nokia, 2004-2005\n");
3273 #ifdef BINARY_BUILD_NOTICE
3274 BINARY_BUILD_NOTICE;
3276 PerlIO_printf(PerlIO_stdout(),
3278 Perl may be copied only under the terms of either the Artistic License or the\n\
3279 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3280 Complete documentation for Perl, including FAQ lists, should be found on\n\
3281 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3282 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3285 if (! (PL_dowarn & G_WARN_ALL_MASK))
3286 PL_dowarn |= G_WARN_ON;
3290 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3291 if (!specialWARN(PL_compiling.cop_warnings))
3292 SvREFCNT_dec(PL_compiling.cop_warnings);
3293 PL_compiling.cop_warnings = pWARN_ALL ;
3297 PL_dowarn = G_WARN_ALL_OFF;
3298 if (!specialWARN(PL_compiling.cop_warnings))
3299 SvREFCNT_dec(PL_compiling.cop_warnings);
3300 PL_compiling.cop_warnings = pWARN_NONE ;
3305 if (s[1] == '-') /* Additional switches on #! line. */
3310 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3316 #ifdef ALTERNATE_SHEBANG
3317 case 'S': /* OS/2 needs -S on "extproc" line. */
3325 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3330 /* compliments of Tom Christiansen */
3332 /* unexec() can be found in the Gnu emacs distribution */
3333 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3336 Perl_my_unexec(pTHX)
3344 prog = newSVpv(BIN_EXP, 0);
3345 sv_catpv(prog, "/perl");
3346 file = newSVpv(PL_origfilename, 0);
3347 sv_catpv(file, ".perldump");
3349 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3350 /* unexec prints msg to stderr in case of failure */
3351 PerlProc_exit(status);
3354 # include <lib$routines.h>
3355 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3357 ABORT(); /* for use with undump */
3362 /* initialize curinterp */
3368 # define PERLVAR(var,type)
3369 # define PERLVARA(var,n,type)
3370 # if defined(PERL_IMPLICIT_CONTEXT)
3371 # if defined(USE_5005THREADS)
3372 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3373 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3374 # else /* !USE_5005THREADS */
3375 # define PERLVARI(var,type,init) aTHX->var = init;
3376 # define PERLVARIC(var,type,init) aTHX->var = init;
3377 # endif /* USE_5005THREADS */
3379 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3380 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3382 # include "intrpvar.h"
3383 # ifndef USE_5005THREADS
3384 # include "thrdvar.h"
3391 # define PERLVAR(var,type)
3392 # define PERLVARA(var,n,type)
3393 # define PERLVARI(var,type,init) PL_##var = init;
3394 # define PERLVARIC(var,type,init) PL_##var = init;
3395 # include "intrpvar.h"
3396 # ifndef USE_5005THREADS
3397 # include "thrdvar.h"
3408 S_init_main_stash(pTHX)
3412 PL_curstash = PL_defstash = newHV();
3413 PL_curstname = newSVpvn("main",4);
3414 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3415 SvREFCNT_dec(GvHV(gv));
3416 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3418 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3419 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3420 GvMULTI_on(PL_incgv);
3421 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3422 GvMULTI_on(PL_hintgv);
3423 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3424 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3425 GvMULTI_on(PL_errgv);
3426 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3427 GvMULTI_on(PL_replgv);
3428 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3429 #ifdef PERL_DONT_CREATE_GVSV
3432 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3433 sv_setpvn(ERRSV, "", 0);
3434 PL_curstash = PL_defstash;
3435 CopSTASH_set(&PL_compiling, PL_defstash);
3436 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3437 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3438 /* We must init $/ before switches are processed. */
3439 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3442 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3444 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3449 const char *cpp_discard_flag;
3458 PL_origfilename = savepvn("-e", 2);
3461 /* if find_script() returns, it returns a malloc()-ed value */
3462 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3464 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3465 const char *s = scriptname + 8;
3466 PL_fdscript = atoi(s);
3471 * Tell apart "normal" usage of fdscript, e.g.
3472 * with bash on FreeBSD:
3473 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3474 * from usage in suidperl.
3475 * Does any "normal" usage leave garbage after the number???
3476 * Is it a mistake to use a similar /dev/fd/ construct for
3481 * Be supersafe and do some sanity-checks.
3482 * Still, can we be sure we got the right thing?
3485 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3488 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3490 scriptname = savepv(s + 1);
3491 Safefree(PL_origfilename);
3492 PL_origfilename = (char *)scriptname;
3497 CopFILE_free(PL_curcop);
3498 CopFILE_set(PL_curcop, PL_origfilename);
3499 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3500 scriptname = (char *)"";
3501 if (PL_fdscript >= 0) {
3502 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3503 # if defined(HAS_FCNTL) && defined(F_SETFD)
3505 /* ensure close-on-exec */
3506 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3511 Perl_croak(aTHX_ "sperl needs fd script\n"
3512 "You should not call sperl directly; do you need to "
3513 "change a #! line\nfrom sperl to perl?\n");
3516 * Do not open (or do other fancy stuff) while setuid.
3517 * Perl does the open, and hands script to suidperl on a fd;
3518 * suidperl only does some checks, sets up UIDs and re-execs
3519 * perl with that fd as it has always done.
3522 if (PL_suidscript != 1) {
3523 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3526 else if (PL_preprocess) {
3527 const char *cpp_cfg = CPPSTDIN;
3528 SV *cpp = newSVpvn("",0);
3529 SV *cmd = NEWSV(0,0);
3531 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3532 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3533 if (strEQ(cpp_cfg, "cppstdin"))
3534 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3535 sv_catpv(cpp, cpp_cfg);
3538 sv_catpvn(sv, "-I", 2);
3539 sv_catpv(sv,PRIVLIB_EXP);
3542 DEBUG_P(PerlIO_printf(Perl_debug_log,
3543 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3544 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3547 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3554 cpp_discard_flag = "";
3556 cpp_discard_flag = "-C";
3560 perl = os2_execname(aTHX);
3562 perl = PL_origargv[0];
3566 /* This strips off Perl comments which might interfere with
3567 the C pre-processor, including #!. #line directives are
3568 deliberately stripped to avoid confusion with Perl's version
3569 of #line. FWP played some golf with it so it will fit
3570 into VMS's 255 character buffer.
3573 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3575 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3577 Perl_sv_setpvf(aTHX_ cmd, "\
3578 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3579 perl, quote, code, quote, scriptname, cpp,
3580 cpp_discard_flag, sv, CPPMINUS);
3582 PL_doextract = FALSE;
3584 DEBUG_P(PerlIO_printf(Perl_debug_log,
3585 "PL_preprocess: cmd=\"%s\"\n",
3588 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3592 else if (!*scriptname) {
3593 forbid_setid("program input from stdin");
3594 PL_rsfp = PerlIO_stdin();
3597 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3598 # if defined(HAS_FCNTL) && defined(F_SETFD)
3600 /* ensure close-on-exec */
3601 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3604 #endif /* IAMSUID */
3606 /* PSz 16 Sep 03 Keep neat error message */
3607 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3608 CopFILE(PL_curcop), Strerror(errno));
3613 * I_SYSSTATVFS HAS_FSTATVFS
3615 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3616 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3617 * here so that metaconfig picks them up. */
3621 S_fd_on_nosuid_fs(pTHX_ int fd)
3624 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3625 * but is needed also on machines without setreuid.
3626 * Seems safe enough to run as root.
3628 int check_okay = 0; /* able to do all the required sys/libcalls */
3629 int on_nosuid = 0; /* the fd is on a nosuid fs */
3631 * Need to check noexec also: nosuid might not be set, the average
3632 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3634 int on_noexec = 0; /* the fd is on a noexec fs */
3637 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3638 * fstatvfs() is UNIX98.
3639 * fstatfs() is 4.3 BSD.
3640 * ustat()+getmnt() is pre-4.3 BSD.
3641 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3642 * an irrelevant filesystem while trying to reach the right one.
3645 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3647 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3648 defined(HAS_FSTATVFS)
3649 # define FD_ON_NOSUID_CHECK_OKAY
3650 struct statvfs stfs;
3652 check_okay = fstatvfs(fd, &stfs) == 0;
3653 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3655 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3656 on platforms where it is present. */
3657 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3659 # endif /* fstatvfs */
3661 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3662 defined(PERL_MOUNT_NOSUID) && \
3663 defined(PERL_MOUNT_NOEXEC) && \
3664 defined(HAS_FSTATFS) && \
3665 defined(HAS_STRUCT_STATFS) && \
3666 defined(HAS_STRUCT_STATFS_F_FLAGS)
3667 # define FD_ON_NOSUID_CHECK_OKAY
3670 check_okay = fstatfs(fd, &stfs) == 0;
3671 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3672 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3673 # endif /* fstatfs */
3675 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3676 defined(PERL_MOUNT_NOSUID) && \
3677 defined(PERL_MOUNT_NOEXEC) && \
3678 defined(HAS_FSTAT) && \
3679 defined(HAS_USTAT) && \
3680 defined(HAS_GETMNT) && \
3681 defined(HAS_STRUCT_FS_DATA) && \
3683 # define FD_ON_NOSUID_CHECK_OKAY
3686 if (fstat(fd, &fdst) == 0) {
3688 if (ustat(fdst.st_dev, &us) == 0) {
3690 /* NOSTAT_ONE here because we're not examining fields which
3691 * vary between that case and STAT_ONE. */
3692 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3693 size_t cmplen = sizeof(us.f_fname);
3694 if (sizeof(fsd.fd_req.path) < cmplen)
3695 cmplen = sizeof(fsd.fd_req.path);
3696 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3697 fdst.st_dev == fsd.fd_req.dev) {
3699 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3700 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3706 # endif /* fstat+ustat+getmnt */
3708 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3709 defined(HAS_GETMNTENT) && \
3710 defined(HAS_HASMNTOPT) && \
3711 defined(MNTOPT_NOSUID) && \
3712 defined(MNTOPT_NOEXEC)
3713 # define FD_ON_NOSUID_CHECK_OKAY
3714 FILE *mtab = fopen("/etc/mtab", "r");
3715 struct mntent *entry;
3718 if (mtab && (fstat(fd, &stb) == 0)) {
3719 while (entry = getmntent(mtab)) {
3720 if (stat(entry->mnt_dir, &fsb) == 0
3721 && fsb.st_dev == stb.st_dev)
3723 /* found the filesystem */
3725 if (hasmntopt(entry, MNTOPT_NOSUID))
3727 if (hasmntopt(entry, MNTOPT_NOEXEC))
3730 } /* A single fs may well fail its stat(). */
3735 # endif /* getmntent+hasmntopt */
3738 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3740 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3742 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3743 return ((!check_okay) || on_nosuid || on_noexec);
3745 #endif /* IAMSUID */
3748 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3753 #endif /* IAMSUID */
3755 /* do we need to emulate setuid on scripts? */
3757 /* This code is for those BSD systems that have setuid #! scripts disabled
3758 * in the kernel because of a security problem. Merely defining DOSUID
3759 * in perl will not fix that problem, but if you have disabled setuid
3760 * scripts in the kernel, this will attempt to emulate setuid and setgid
3761 * on scripts that have those now-otherwise-useless bits set. The setuid
3762 * root version must be called suidperl or sperlN.NNN. If regular perl
3763 * discovers that it has opened a setuid script, it calls suidperl with
3764 * the same argv that it had. If suidperl finds that the script it has
3765 * just opened is NOT setuid root, it sets the effective uid back to the
3766 * uid. We don't just make perl setuid root because that loses the
3767 * effective uid we had before invoking perl, if it was different from the
3770 * Description/comments above do not match current workings:
3771 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3772 * suidperl called with script open and name changed to /dev/fd/N/X;
3773 * suidperl croaks if script is not setuid;
3774 * making perl setuid would be a huge security risk (and yes, that
3775 * would lose any euid we might have had).
3777 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3778 * be defined in suidperl only. suidperl must be setuid root. The
3779 * Configure script will set this up for you if you want it.
3785 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3786 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3787 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3789 const char *linestr;
3792 if (PL_fdscript < 0 || PL_suidscript != 1)
3793 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3795 * Since the script is opened by perl, not suidperl, some of these
3796 * checks are superfluous. Leaving them in probably does not lower
3800 * Do checks even for systems with no HAS_SETREUID.
3801 * We used to swap, then re-swap UIDs with
3803 if (setreuid(PL_euid,PL_uid) < 0
3804 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3805 Perl_croak(aTHX_ "Can't swap uid and euid");
3808 if (setreuid(PL_uid,PL_euid) < 0
3809 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3810 Perl_croak(aTHX_ "Can't reswap uid and euid");
3814 /* On this access check to make sure the directories are readable,
3815 * there is actually a small window that the user could use to make
3816 * filename point to an accessible directory. So there is a faint
3817 * chance that someone could execute a setuid script down in a
3818 * non-accessible directory. I don't know what to do about that.
3819 * But I don't think it's too important. The manual lies when
3820 * it says access() is useful in setuid programs.
3822 * So, access() is pretty useless... but not harmful... do anyway.
3824 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3825 Perl_croak(aTHX_ "Can't access() script\n");
3828 /* If we can swap euid and uid, then we can determine access rights
3829 * with a simple stat of the file, and then compare device and
3830 * inode to make sure we did stat() on the same file we opened.
3831 * Then we just have to make sure he or she can execute it.
3834 * As the script is opened by perl, not suidperl, we do not need to
3835 * care much about access rights.
3837 * The 'script changed' check is needed, or we can get lied to
3838 * about $0 with e.g.
3839 * suidperl /dev/fd/4//bin/x 4<setuidscript
3840 * Without HAS_SETREUID, is it safe to stat() as root?
3842 * Are there any operating systems that pass /dev/fd/xxx for setuid
3843 * scripts, as suggested/described in perlsec(1)? Surely they do not
3844 * pass the script name as we do, so the "script changed" test would
3845 * fail for them... but we never get here with
3846 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3848 * This is one place where we must "lie" about return status: not
3849 * say if the stat() failed. We are doing this as root, and could
3850 * be tricked into reporting existence or not of files that the
3851 * "plain" user cannot even see.
3855 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3856 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3857 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3858 Perl_croak(aTHX_ "Setuid script changed\n");
3862 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3863 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3866 * We used to do this check as the "plain" user (after swapping
3867 * UIDs). But the check for nosuid and noexec filesystem is needed,
3868 * and should be done even without HAS_SETREUID. (Maybe those
3869 * operating systems do not have such mount options anyway...)
3870 * Seems safe enough to do as root.
3872 #if !defined(NO_NOSUID_CHECK)
3873 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3874 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3877 #endif /* IAMSUID */
3879 if (!S_ISREG(PL_statbuf.st_mode)) {
3880 Perl_croak(aTHX_ "Setuid script not plain file\n");
3882 if (PL_statbuf.st_mode & S_IWOTH)
3883 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3884 PL_doswitches = FALSE; /* -s is insecure in suid */
3885 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3886 CopLINE_inc(PL_curcop);
3887 linestr = SvPV_nolen_const(PL_linestr);
3888 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3889 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3890 Perl_croak(aTHX_ "No #! line");
3894 /* Sanity check on line length */
3895 if (strlen(s) < 1 || strlen(s) > 4000)
3896 Perl_croak(aTHX_ "Very long #! line");
3897 /* Allow more than a single space after #! */
3898 while (isSPACE(*s)) s++;
3899 /* Sanity check on buffer end */
3900 while ((*s) && !isSPACE(*s)) s++;
3901 for (s2 = s; (s2 > linestr &&
3902 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3903 || s2[-1] == '-')); s2--) ;
3904 /* Sanity check on buffer start */
3905 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3906 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3907 Perl_croak(aTHX_ "Not a perl script");
3908 while (*s == ' ' || *s == '\t') s++;
3910 * #! arg must be what we saw above. They can invoke it by
3911 * mentioning suidperl explicitly, but they may not add any strange
3912 * arguments beyond what #! says if they do invoke suidperl that way.
3915 * The way validarg was set up, we rely on the kernel to start
3916 * scripts with argv[1] set to contain all #! line switches (the
3920 * Check that we got all the arguments listed in the #! line (not
3921 * just that there are no extraneous arguments). Might not matter
3922 * much, as switches from #! line seem to be acted upon (also), and
3923 * so may be checked and trapped in perl. But, security checks must
3924 * be done in suidperl and not deferred to perl. Note that suidperl
3925 * does not get around to parsing (and checking) the switches on
3926 * the #! line (but execs perl sooner).
3927 * Allow (require) a trailing newline (which may be of two
3928 * characters on some architectures?) (but no other trailing
3931 len = strlen(validarg);
3932 if (strEQ(validarg," PHOOEY ") ||
3933 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3934 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3935 Perl_croak(aTHX_ "Args must match #! line");
3938 if (PL_fdscript < 0 &&
3939 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3940 PL_euid == PL_statbuf.st_uid)
3942 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3943 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3944 #endif /* IAMSUID */
3946 if (PL_fdscript < 0 &&
3947 PL_euid) { /* oops, we're not the setuid root perl */
3949 * When root runs a setuid script, we do not go through the same
3950 * steps of execing sperl and then perl with fd scripts, but
3951 * simply set up UIDs within the same perl invocation; so do
3952 * not have the same checks (on options, whatever) that we have
3953 * for plain users. No problem really: would have to be a script
3954 * that does not actually work for plain users; and if root is
3955 * foolish and can be persuaded to run such an unsafe script, he
3956 * might run also non-setuid ones, and deserves what he gets.
3958 * Or, we might drop the PL_euid check above (and rely just on
3959 * PL_fdscript to avoid loops), and do the execs
3965 * Pass fd script to suidperl.
3966 * Exec suidperl, substituting fd script for scriptname.
3967 * Pass script name as "subdir" of fd, which perl will grok;
3968 * in fact will use that to distinguish this from "normal"
3969 * usage, see comments above.
3971 PerlIO_rewind(PL_rsfp);
3972 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3973 /* PSz 27 Feb 04 Sanity checks on scriptname */
3974 if ((!scriptname) || (!*scriptname) ) {
3975 Perl_croak(aTHX_ "No setuid script name\n");
3977 if (*scriptname == '-') {
3978 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3979 /* Or we might confuse it with an option when replacing
3980 * name in argument list, below (though we do pointer, not
3981 * string, comparisons).
3984 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3985 if (!PL_origargv[which]) {
3986 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3988 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3989 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3990 #if defined(HAS_FCNTL) && defined(F_SETFD)
3991 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3994 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3995 (int)PERL_REVISION, (int)PERL_VERSION,
3996 (int)PERL_SUBVERSION), PL_origargv);
3998 #endif /* IAMSUID */
3999 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4002 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4004 * This seems back to front: we try HAS_SETEGID first; if not available
4005 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4006 * in the sense that we only want to set EGID; but are there any machines
4007 * with either of the latter, but not the former? Same with UID, later.
4010 (void)setegid(PL_statbuf.st_gid);
4013 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4015 #ifdef HAS_SETRESGID
4016 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4018 PerlProc_setgid(PL_statbuf.st_gid);
4022 if (PerlProc_getegid() != PL_statbuf.st_gid)
4023 Perl_croak(aTHX_ "Can't do setegid!\n");
4025 if (PL_statbuf.st_mode & S_ISUID) {
4026 if (PL_statbuf.st_uid != PL_euid)
4028 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4031 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4033 #ifdef HAS_SETRESUID
4034 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4036 PerlProc_setuid(PL_statbuf.st_uid);
4040 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4041 Perl_croak(aTHX_ "Can't do seteuid!\n");
4043 else if (PL_uid) { /* oops, mustn't run as root */
4045 (void)seteuid((Uid_t)PL_uid);
4048 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4050 #ifdef HAS_SETRESUID
4051 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4053 PerlProc_setuid((Uid_t)PL_uid);
4057 if (PerlProc_geteuid() != PL_uid)
4058 Perl_croak(aTHX_ "Can't do seteuid!\n");
4061 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4062 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4065 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4066 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4067 else if (PL_fdscript < 0 || PL_suidscript != 1)
4068 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4069 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4071 /* PSz 16 Sep 03 Keep neat error message */
4072 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4075 /* We absolutely must clear out any saved ids here, so we */
4076 /* exec the real perl, substituting fd script for scriptname. */
4077 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4079 * It might be thought that using setresgid and/or setresuid (changed to
4080 * set the saved IDs) above might obviate the need to exec, and we could
4081 * go on to "do the perl thing".
4083 * Is there such a thing as "saved GID", and is that set for setuid (but
4084 * not setgid) execution like suidperl? Without exec, it would not be
4085 * cleared for setuid (but not setgid) scripts (or might need a dummy
4088 * We need suidperl to do the exact same argument checking that perl
4089 * does. Thus it cannot be very small; while it could be significantly
4090 * smaller, it is safer (simpler?) to make it essentially the same
4091 * binary as perl (but they are not identical). - Maybe could defer that
4092 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4093 * but prefer to do thorough checks in suidperl itself. Such deferral
4094 * would make suidperl security rely on perl, a design no-no.
4096 * Setuid things should be short and simple, thus easy to understand and
4097 * verify. They should do their "own thing", without influence by
4098 * attackers. It may help if their internal execution flow is fixed,
4099 * regardless of platform: it may be best to exec anyway.
4101 * Suidperl should at least be conceptually simple: a wrapper only,
4102 * never to do any real perl. Maybe we should put
4104 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4106 * into the perly bits.
4108 PerlIO_rewind(PL_rsfp);
4109 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4111 * Keep original arguments: suidperl already has fd script.
4113 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4114 /* if (!PL_origargv[which]) { */
4115 /* errno = EPERM; */
4116 /* Perl_croak(aTHX_ "Permission denied\n"); */
4118 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4119 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4120 #if defined(HAS_FCNTL) && defined(F_SETFD)
4121 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4124 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4125 (int)PERL_REVISION, (int)PERL_VERSION,
4126 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4128 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4129 #endif /* IAMSUID */
4131 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4132 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4133 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4134 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4136 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4139 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4140 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4141 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4142 /* not set-id, must be wrapped */
4150 S_find_beginning(pTHX)
4153 register const char *s2;
4154 #ifdef MACOS_TRADITIONAL
4158 /* skip forward in input to the real script? */
4161 #ifdef MACOS_TRADITIONAL
4162 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4164 while (PL_doextract || gMacPerl_AlwaysExtract) {
4165 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4166 if (!gMacPerl_AlwaysExtract)
4167 Perl_croak(aTHX_ "No Perl script found in input\n");
4169 if (PL_doextract) /* require explicit override ? */
4170 if (!OverrideExtract(PL_origfilename))
4171 Perl_croak(aTHX_ "User aborted script\n");
4173 PL_doextract = FALSE;
4175 /* Pater peccavi, file does not have #! */
4176 PerlIO_rewind(PL_rsfp);
4181 while (PL_doextract) {
4182 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4183 Perl_croak(aTHX_ "No Perl script found in input\n");
4186 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4187 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4188 PL_doextract = FALSE;
4189 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4191 while (*s == ' ' || *s == '\t') s++;
4193 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4194 || s2[-1] == '_') s2--;
4195 if (strnEQ(s2-4,"perl",4))
4196 while ((s = moreswitches(s)))
4199 #ifdef MACOS_TRADITIONAL
4200 /* We are always searching for the #!perl line in MacPerl,
4201 * so if we find it, still keep the line count correct
4202 * by counting lines we already skipped over
4204 for (; maclines > 0 ; maclines--)
4205 PerlIO_ungetc(PL_rsfp, '\n');
4209 /* gMacPerl_AlwaysExtract is false in MPW tool */
4210 } else if (gMacPerl_AlwaysExtract) {
4221 PL_uid = PerlProc_getuid();
4222 PL_euid = PerlProc_geteuid();
4223 PL_gid = PerlProc_getgid();
4224 PL_egid = PerlProc_getegid();
4226 PL_uid |= PL_gid << 16;
4227 PL_euid |= PL_egid << 16;
4229 /* Should not happen: */
4230 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4231 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4234 * Should go by suidscript, not uid!=euid: why disallow
4235 * system("ls") in scripts run from setuid things?
4236 * Or, is this run before we check arguments and set suidscript?
4237 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4238 * (We never have suidscript, can we be sure to have fdscript?)
4239 * Or must then go by UID checks? See comments in forbid_setid also.
4243 /* This is used very early in the lifetime of the program,
4244 * before even the options are parsed, so PL_tainting has
4245 * not been initialized properly. */
4247 Perl_doing_taint(int argc, char *argv[], char *envp[])
4249 #ifndef PERL_IMPLICIT_SYS
4250 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4251 * before we have an interpreter-- and the whole point of this
4252 * function is to be called at such an early stage. If you are on
4253 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4254 * "tainted because running with altered effective ids', you'll
4255 * have to add your own checks somewhere in here. The two most
4256 * known samples of 'implicitness' are Win32 and NetWare, neither
4257 * of which has much of concept of 'uids'. */
4258 int uid = PerlProc_getuid();
4259 int euid = PerlProc_geteuid();
4260 int gid = PerlProc_getgid();
4261 int egid = PerlProc_getegid();
4268 if (uid && (euid != uid || egid != gid))
4270 #endif /* !PERL_IMPLICIT_SYS */
4271 /* This is a really primitive check; environment gets ignored only
4272 * if -T are the first chars together; otherwise one gets
4273 * "Too late" message. */
4274 if ( argc > 1 && argv[1][0] == '-'
4275 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4281 S_forbid_setid(pTHX_ const char *s)
4283 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4284 if (PL_euid != PL_uid)
4285 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4286 if (PL_egid != PL_gid)
4287 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4288 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4290 * Checks for UID/GID above "wrong": why disallow
4291 * perl -e 'print "Hello\n"'
4292 * from within setuid things?? Simply drop them: replaced by
4293 * fdscript/suidscript and #ifdef IAMSUID checks below.
4295 * This may be too late for command-line switches. Will catch those on
4296 * the #! line, after finding the script name and setting up
4297 * fdscript/suidscript. Note that suidperl does not get around to
4298 * parsing (and checking) the switches on the #! line, but checks that
4299 * the two sets are identical.
4301 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4302 * instead, or would that be "too late"? (We never have suidscript, can
4303 * we be sure to have fdscript?)
4305 * Catch things with suidscript (in descendant of suidperl), even with
4306 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4307 * below; but I am paranoid.
4309 * Also see comments about root running a setuid script, elsewhere.
4311 if (PL_suidscript >= 0)
4312 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4314 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4315 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4316 #endif /* IAMSUID */
4320 Perl_init_debugger(pTHX)
4322 HV *ostash = PL_curstash;
4324 PL_curstash = PL_debstash;
4325 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4326 AvREAL_off(PL_dbargs);
4327 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4328 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4329 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4330 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4331 sv_setiv(PL_DBsingle, 0);
4332 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4333 sv_setiv(PL_DBtrace, 0);
4334 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4335 sv_setiv(PL_DBsignal, 0);
4336 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4337 sv_setiv(PL_DBassertion, 0);
4338 PL_curstash = ostash;
4341 #ifndef STRESS_REALLOC
4342 #define REASONABLE(size) (size)
4344 #define REASONABLE(size) (1) /* unreasonable */
4348 Perl_init_stacks(pTHX)
4350 /* start with 128-item stack and 8K cxstack */
4351 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4352 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4353 PL_curstackinfo->si_type = PERLSI_MAIN;
4354 PL_curstack = PL_curstackinfo->si_stack;
4355 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4357 PL_stack_base = AvARRAY(PL_curstack);
4358 PL_stack_sp = PL_stack_base;
4359 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4361 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4364 PL_tmps_max = REASONABLE(128);
4366 Newx(PL_markstack,REASONABLE(32),I32);
4367 PL_markstack_ptr = PL_markstack;
4368 PL_markstack_max = PL_markstack + REASONABLE(32);
4372 Newx(PL_scopestack,REASONABLE(32),I32);
4373 PL_scopestack_ix = 0;
4374 PL_scopestack_max = REASONABLE(32);
4376 Newx(PL_savestack,REASONABLE(128),ANY);
4377 PL_savestack_ix = 0;
4378 PL_savestack_max = REASONABLE(128);
4386 while (PL_curstackinfo->si_next)
4387 PL_curstackinfo = PL_curstackinfo->si_next;
4388 while (PL_curstackinfo) {
4389 PERL_SI *p = PL_curstackinfo->si_prev;
4390 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4391 Safefree(PL_curstackinfo->si_cxstack);
4392 Safefree(PL_curstackinfo);
4393 PL_curstackinfo = p;
4395 Safefree(PL_tmps_stack);
4396 Safefree(PL_markstack);
4397 Safefree(PL_scopestack);
4398 Safefree(PL_savestack);
4407 lex_start(PL_linestr);
4409 PL_subname = newSVpvn("main",4);
4413 S_init_predump_symbols(pTHX)
4418 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4419 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4420 GvMULTI_on(PL_stdingv);
4421 io = GvIOp(PL_stdingv);
4422 IoTYPE(io) = IoTYPE_RDONLY;
4423 IoIFP(io) = PerlIO_stdin();
4424 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4426 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4428 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4431 IoTYPE(io) = IoTYPE_WRONLY;
4432 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4434 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4436 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4438 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4439 GvMULTI_on(PL_stderrgv);
4440 io = GvIOp(PL_stderrgv);
4441 IoTYPE(io) = IoTYPE_WRONLY;
4442 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4443 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4445 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4447 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4449 Safefree(PL_osname);
4450 PL_osname = savepv(OSNAME);
4454 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4456 argc--,argv++; /* skip name of script */
4457 if (PL_doswitches) {
4458 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4462 if (argv[0][1] == '-' && !argv[0][2]) {
4466 if ((s = strchr(argv[0], '='))) {
4468 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4471 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4474 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4475 GvMULTI_on(PL_argvgv);
4476 (void)gv_AVadd(PL_argvgv);
4477 av_clear(GvAVn(PL_argvgv));
4478 for (; argc > 0; argc--,argv++) {
4479 SV * const sv = newSVpv(argv[0],0);
4480 av_push(GvAVn(PL_argvgv),sv);
4481 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4482 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4485 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4486 (void)sv_utf8_decode(sv);
4492 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4497 PL_toptarget = NEWSV(0,0);
4498 sv_upgrade(PL_toptarget, SVt_PVFM);
4499 sv_setpvn(PL_toptarget, "", 0);
4500 PL_bodytarget = NEWSV(0,0);
4501 sv_upgrade(PL_bodytarget, SVt_PVFM);
4502 sv_setpvn(PL_bodytarget, "", 0);
4503 PL_formtarget = PL_bodytarget;
4507 init_argv_symbols(argc,argv);
4509 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4510 #ifdef MACOS_TRADITIONAL
4511 /* $0 is not majick on a Mac */
4512 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4514 sv_setpv(GvSV(tmpgv),PL_origfilename);
4515 magicname("0", "0", 1);
4518 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4520 GvMULTI_on(PL_envgv);
4521 hv = GvHVn(PL_envgv);
4522 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4524 #ifdef USE_ENVIRON_ARRAY
4525 /* Note that if the supplied env parameter is actually a copy
4526 of the global environ then it may now point to free'd memory
4527 if the environment has been modified since. To avoid this
4528 problem we treat env==NULL as meaning 'use the default'
4533 # ifdef USE_ITHREADS
4534 && PL_curinterp == aTHX
4538 environ[0] = Nullch;
4541 char** origenv = environ;
4544 for (; *env; env++) {
4545 if (!(s = strchr(*env,'=')) || s == *env)
4547 #if defined(MSDOS) && !defined(DJGPP)
4552 sv = newSVpv(s+1, 0);
4553 (void)hv_store(hv, *env, s - *env, sv, 0);
4556 if (origenv != environ) {
4557 /* realloc has shifted us */
4558 env = (env - origenv) + environ;
4563 #endif /* USE_ENVIRON_ARRAY */
4564 #endif /* !PERL_MICRO */
4567 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4568 SvREADONLY_off(GvSV(tmpgv));
4569 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4570 SvREADONLY_on(GvSV(tmpgv));
4572 #ifdef THREADS_HAVE_PIDS
4573 PL_ppid = (IV)getppid();
4576 /* touch @F array to prevent spurious warnings 20020415 MJD */
4578 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4580 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4581 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4582 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4586 S_init_perllib(pTHX)
4591 s = PerlEnv_getenv("PERL5LIB");
4593 incpush(s, TRUE, TRUE, TRUE, FALSE);
4595 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4597 /* Treat PERL5?LIB as a possible search list logical name -- the
4598 * "natural" VMS idiom for a Unix path string. We allow each
4599 * element to be a set of |-separated directories for compatibility.
4603 if (my_trnlnm("PERL5LIB",buf,0))
4604 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4606 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4610 /* Use the ~-expanded versions of APPLLIB (undocumented),
4611 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4614 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4618 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4620 #ifdef MACOS_TRADITIONAL
4623 SV * privdir = NEWSV(55, 0);
4624 char * macperl = PerlEnv_getenv("MACPERL");
4629 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4630 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4631 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4632 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4633 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4634 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4636 SvREFCNT_dec(privdir);
4639 incpush(":", FALSE, FALSE, TRUE, FALSE);
4642 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4645 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4647 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4651 /* sitearch is always relative to sitelib on Windows for
4652 * DLL-based path intuition to work correctly */
4653 # if !defined(WIN32)
4654 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4660 /* this picks up sitearch as well */
4661 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4663 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4667 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4668 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4671 #ifdef PERL_VENDORARCH_EXP
4672 /* vendorarch is always relative to vendorlib on Windows for
4673 * DLL-based path intuition to work correctly */
4674 # if !defined(WIN32)
4675 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4679 #ifdef PERL_VENDORLIB_EXP
4681 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4683 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4687 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4688 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4691 #ifdef PERL_OTHERLIBDIRS
4692 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4696 incpush(".", FALSE, FALSE, TRUE, FALSE);
4697 #endif /* MACOS_TRADITIONAL */
4700 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4701 # define PERLLIB_SEP ';'
4704 # define PERLLIB_SEP '|'
4706 # if defined(MACOS_TRADITIONAL)
4707 # define PERLLIB_SEP ','
4709 # define PERLLIB_SEP ':'
4713 #ifndef PERLLIB_MANGLE
4714 # define PERLLIB_MANGLE(s,n) (s)
4717 /* Push a directory onto @INC if it exists.
4718 Generate a new SV if we do this, to save needing to copy the SV we push
4721 S_incpush_if_exists(pTHX_ SV *dir)
4724 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4725 S_ISDIR(tmpstatbuf.st_mode)) {
4726 av_push(GvAVn(PL_incgv), dir);
4733 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4736 SV *subdir = Nullsv;
4737 const char *p = dir;
4742 if (addsubdirs || addoldvers) {
4743 subdir = NEWSV(0,0);
4746 /* Break at all separators */
4748 SV *libdir = NEWSV(55,0);
4751 /* skip any consecutive separators */
4753 while ( *p == PERLLIB_SEP ) {
4754 /* Uncomment the next line for PATH semantics */
4755 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4760 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4761 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4766 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4767 p = Nullch; /* break out */
4769 #ifdef MACOS_TRADITIONAL
4770 if (!strchr(SvPVX(libdir), ':')) {
4773 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4775 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4776 sv_catpv(libdir, ":");
4779 /* Do the if() outside the #ifdef to avoid warnings about an unused
4782 #ifdef PERL_RELOCATABLE_INC
4784 * Relocatable include entries are marked with a leading .../
4787 * 0: Remove that leading ".../"
4788 * 1: Remove trailing executable name (anything after the last '/')
4789 * from the perl path to give a perl prefix
4791 * While the @INC element starts "../" and the prefix ends with a real
4792 * directory (ie not . or ..) chop that real directory off the prefix
4793 * and the leading "../" from the @INC element. ie a logical "../"
4795 * Finally concatenate the prefix and the remainder of the @INC element
4796 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4797 * generates /usr/local/lib/perl5
4799 const char *libpath = SvPVX(libdir);
4800 STRLEN libpath_len = SvCUR(libdir);
4801 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4803 SV * const caret_X = get_sv("\030", 0);
4804 /* Going to use the SV just as a scratch buffer holding a C
4810 /* $^X is *the* source of taint if tainting is on, hence
4811 SvPOK() won't be true. */
4813 assert(SvPOKp(caret_X));
4814 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4815 /* Firstly take off the leading .../
4816 If all else fail we'll do the paths relative to the current
4818 sv_chop(libdir, libpath + 4);
4819 /* Don't use SvPV as we're intentionally bypassing taining,
4820 mortal copies that the mg_get of tainting creates, and
4821 corruption that seems to come via the save stack.
4822 I guess that the save stack isn't correctly set up yet. */
4823 libpath = SvPVX(libdir);
4824 libpath_len = SvCUR(libdir);
4826 /* This would work more efficiently with memrchr, but as it's
4827 only a GNU extension we'd need to probe for it and
4828 implement our own. Not hard, but maybe not worth it? */
4830 prefix = SvPVX(prefix_sv);
4831 lastslash = strrchr(prefix, '/');
4833 /* First time in with the *lastslash = '\0' we just wipe off
4834 the trailing /perl from (say) /usr/foo/bin/perl
4838 while ((*lastslash = '\0'), /* Do that, come what may. */
4839 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4840 && (lastslash = strrchr(prefix, '/')))) {
4841 if (lastslash[1] == '\0'
4842 || (lastslash[1] == '.'
4843 && (lastslash[2] == '/' /* ends "/." */
4844 || (lastslash[2] == '/'
4845 && lastslash[3] == '/' /* or "/.." */
4847 /* Prefix ends "/" or "/." or "/..", any of which
4848 are fishy, so don't do any more logical cleanup.
4852 /* Remove leading "../" from path */
4855 /* Next iteration round the loop removes the last
4856 directory name from prefix by writing a '\0' in
4857 the while clause. */
4859 /* prefix has been terminated with a '\0' to the correct
4860 length. libpath points somewhere into the libdir SV.
4861 We need to join the 2 with '/' and drop the result into
4863 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4864 SvREFCNT_dec(libdir);
4865 /* And this is the new libdir. */
4868 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4869 /* Need to taint reloccated paths if running set ID */
4870 SvTAINTED_on(libdir);
4873 SvREFCNT_dec(prefix_sv);
4878 * BEFORE pushing libdir onto @INC we may first push version- and
4879 * archname-specific sub-directories.
4881 if (addsubdirs || addoldvers) {
4882 #ifdef PERL_INC_VERSION_LIST
4883 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4884 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4885 const char **incver;
4891 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4893 while (unix[len-1] == '/') len--; /* Cosmetic */
4894 sv_usepvn(libdir,unix,len);
4897 PerlIO_printf(Perl_error_log,
4898 "Failed to unixify @INC element \"%s\"\n",
4902 #ifdef MACOS_TRADITIONAL
4903 #define PERL_AV_SUFFIX_FMT ""
4904 #define PERL_ARCH_FMT "%s:"
4905 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4907 #define PERL_AV_SUFFIX_FMT "/"
4908 #define PERL_ARCH_FMT "/%s"
4909 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4911 /* .../version/archname if -d .../version/archname */
4912 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4914 (int)PERL_REVISION, (int)PERL_VERSION,
4915 (int)PERL_SUBVERSION, ARCHNAME);
4916 subdir = S_incpush_if_exists(aTHX_ subdir);
4918 /* .../version if -d .../version */
4919 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4920 (int)PERL_REVISION, (int)PERL_VERSION,
4921 (int)PERL_SUBVERSION);
4922 subdir = S_incpush_if_exists(aTHX_ subdir);
4924 /* .../archname if -d .../archname */
4925 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4926 subdir = S_incpush_if_exists(aTHX_ subdir);
4930 #ifdef PERL_INC_VERSION_LIST
4932 for (incver = incverlist; *incver; incver++) {
4933 /* .../xxx if -d .../xxx */
4934 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4935 subdir = S_incpush_if_exists(aTHX_ subdir);
4941 /* finally push this lib directory on the end of @INC */
4942 av_push(GvAVn(PL_incgv), libdir);
4945 assert (SvREFCNT(subdir) == 1);
4946 SvREFCNT_dec(subdir);
4950 #ifdef USE_5005THREADS
4951 STATIC struct perl_thread *
4952 S_init_main_thread(pTHX)
4954 #if !defined(PERL_IMPLICIT_CONTEXT)
4955 struct perl_thread *thr;
4959 Newxz(thr, 1, struct perl_thread);
4960 PL_curcop = &PL_compiling;
4961 thr->interp = PERL_GET_INTERP;
4962 thr->cvcache = newHV();
4963 thr->threadsv = newAV();
4964 /* thr->threadsvp is set when find_threadsv is called */
4965 thr->specific = newAV();
4966 thr->flags = THRf_R_JOINABLE;
4967 MUTEX_INIT(&thr->mutex);
4968 /* Handcraft thrsv similarly to mess_sv */
4969 Newx(PL_thrsv, 1, SV);
4971 SvFLAGS(PL_thrsv) = SVt_PV;
4972 SvANY(PL_thrsv) = (void*)xpv;
4973 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4974 SvPV_set(PL_thrsvr, (char*)thr);
4975 SvCUR_set(PL_thrsv, sizeof(thr));
4976 SvLEN_set(PL_thrsv, sizeof(thr));
4977 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4978 thr->oursv = PL_thrsv;
4979 PL_chopset = " \n-";
4982 MUTEX_LOCK(&PL_threads_mutex);
4988 MUTEX_UNLOCK(&PL_threads_mutex);
4990 #ifdef HAVE_THREAD_INTERN
4991 Perl_init_thread_intern(thr);
4994 #ifdef SET_THREAD_SELF
4995 SET_THREAD_SELF(thr);
4997 thr->self = pthread_self();
4998 #endif /* SET_THREAD_SELF */
5002 * These must come after the thread self setting
5003 * because sv_setpvn does SvTAINT and the taint
5004 * fields thread selfness being set.
5006 PL_toptarget = NEWSV(0,0);
5007 sv_upgrade(PL_toptarget, SVt_PVFM);
5008 sv_setpvn(PL_toptarget, "", 0);
5009 PL_bodytarget = NEWSV(0,0);
5010 sv_upgrade(PL_bodytarget, SVt_PVFM);
5011 sv_setpvn(PL_bodytarget, "", 0);
5012 PL_formtarget = PL_bodytarget;
5013 thr->errsv = newSVpvn("", 0);
5014 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5017 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5018 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5019 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5020 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5021 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5022 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5024 PL_reginterp_cnt = 0;
5028 #endif /* USE_5005THREADS */
5031 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5035 const line_t oldline = CopLINE(PL_curcop);
5041 while (av_len(paramList) >= 0) {
5042 cv = (CV*)av_shift(paramList);
5044 if (paramList == PL_beginav) {
5045 /* save PL_beginav for compiler */
5046 if (! PL_beginav_save)
5047 PL_beginav_save = newAV();
5048 av_push(PL_beginav_save, (SV*)cv);
5050 else if (paramList == PL_checkav) {
5051 /* save PL_checkav for compiler */
5052 if (! PL_checkav_save)
5053 PL_checkav_save = newAV();
5054 av_push(PL_checkav_save, (SV*)cv);
5064 (void)SvPV_const(atsv, len);
5066 PL_curcop = &PL_compiling;
5067 CopLINE_set(PL_curcop, oldline);
5068 if (paramList == PL_beginav)
5069 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5071 Perl_sv_catpvf(aTHX_ atsv,
5072 "%s failed--call queue aborted",
5073 paramList == PL_checkav ? "CHECK"
5074 : paramList == PL_initav ? "INIT"
5076 while (PL_scopestack_ix > oldscope)
5079 Perl_croak(aTHX_ "%"SVf"", atsv);
5086 /* my_exit() was called */
5087 while (PL_scopestack_ix > oldscope)
5090 PL_curstash = PL_defstash;
5091 PL_curcop = &PL_compiling;
5092 CopLINE_set(PL_curcop, oldline);
5094 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5095 if (paramList == PL_beginav)
5096 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5098 Perl_croak(aTHX_ "%s failed--call queue aborted",
5099 paramList == PL_checkav ? "CHECK"
5100 : paramList == PL_initav ? "INIT"
5107 PL_curcop = &PL_compiling;
5108 CopLINE_set(PL_curcop, oldline);
5111 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5120 S_call_list_body(pTHX_ CV *cv)
5122 PUSHMARK(PL_stack_sp);
5123 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5128 Perl_my_exit(pTHX_ U32 status)
5130 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5131 thr, (unsigned long) status));
5140 STATUS_NATIVE_SET(status);
5147 Perl_my_failure_exit(pTHX)
5150 if (vaxc$errno & 1) {
5151 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5152 STATUS_NATIVE_SET(44);
5155 if (!vaxc$errno) /* unlikely */
5156 STATUS_NATIVE_SET(44);
5158 STATUS_NATIVE_SET(vaxc$errno);
5163 STATUS_UNIX_SET(errno);
5165 exitstatus = STATUS_UNIX >> 8;
5166 if (exitstatus & 255)
5167 STATUS_UNIX_SET(exitstatus);
5169 STATUS_UNIX_SET(255);
5176 S_my_exit_jump(pTHX)
5179 register PERL_CONTEXT *cx;
5184 SvREFCNT_dec(PL_e_script);
5185 PL_e_script = Nullsv;
5188 POPSTACK_TO(PL_mainstack);
5189 if (cxstack_ix >= 0) {
5192 POPBLOCK(cx,PL_curpm);
5197 PERL_UNUSED_VAR(gimme);
5198 PERL_UNUSED_VAR(newsp);
5202 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5204 const char * const p = SvPVX_const(PL_e_script);
5205 const char *nl = strchr(p, '\n');
5207 PERL_UNUSED_ARG(idx);
5208 PERL_UNUSED_ARG(maxlen);
5210 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5212 filter_del(read_e_script);
5215 sv_catpvn(buf_sv, p, nl-p);
5216 sv_chop(PL_e_script, nl);
5222 * c-indentation-style: bsd
5224 * indent-tabs-mode: t
5227 * ex: set ts=8 sts=4 sw=4 noet: