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 /* New() 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 /* New() 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 = 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;
1212 Safefree(PL_reg_curpm);
1213 Safefree(PL_reg_poscache);
1214 free_tied_hv_pool();
1215 Safefree(PL_op_mask);
1216 Safefree(PL_psig_ptr);
1217 PL_psig_ptr = (SV**)NULL;
1218 Safefree(PL_psig_name);
1219 PL_psig_name = (SV**)NULL;
1220 Safefree(PL_bitcount);
1221 PL_bitcount = Nullch;
1222 Safefree(PL_psig_pend);
1223 PL_psig_pend = (int*)NULL;
1224 PL_formfeed = Nullsv;
1226 PL_tainting = FALSE;
1227 PL_taint_warn = FALSE;
1228 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1231 DEBUG_P(debprofdump());
1233 #ifdef USE_REENTRANT_API
1234 Perl_reentrant_free(aTHX);
1239 /* As the absolutely last thing, free the non-arena SV for mess() */
1242 /* we know that type == SVt_PVMG */
1244 /* it could have accumulated taint magic */
1247 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1248 moremagic = mg->mg_moremagic;
1249 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1251 Safefree(mg->mg_ptr);
1255 /* we know that type >= SVt_PV */
1256 SvPV_free(PL_mess_sv);
1257 Safefree(SvANY(PL_mess_sv));
1258 Safefree(PL_mess_sv);
1259 PL_mess_sv = Nullsv;
1261 return STATUS_NATIVE_EXPORT;
1265 =for apidoc perl_free
1267 Releases a Perl interpreter. See L<perlembed>.
1275 #if defined(WIN32) || defined(NETWARE)
1276 # if defined(PERL_IMPLICIT_SYS)
1278 void *host = nw_internal_host;
1280 void *host = w32_internal_host;
1282 PerlMem_free(aTHXx);
1284 nw_delete_internal_host(host);
1286 win32_delete_internal_host(host);
1289 PerlMem_free(aTHXx);
1292 PerlMem_free(aTHXx);
1296 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1297 /* provide destructors to clean up the thread key when libperl is unloaded */
1298 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1300 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1301 #pragma fini "perl_fini"
1305 #if defined(__GNUC__)
1306 __attribute__((destructor))
1316 #endif /* THREADS */
1319 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1321 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1322 PL_exitlist[PL_exitlistlen].fn = fn;
1323 PL_exitlist[PL_exitlistlen].ptr = ptr;
1327 #ifdef HAS_PROCSELFEXE
1328 /* This is a function so that we don't hold on to MAXPATHLEN
1329 bytes of stack longer than necessary
1332 S_procself_val(pTHX_ SV *sv, const char *arg0)
1334 char buf[MAXPATHLEN];
1335 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1337 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1338 includes a spurious NUL which will cause $^X to fail in system
1339 or backticks (this will prevent extensions from being built and
1340 many tests from working). readlink is not meant to add a NUL.
1341 Normal readlink works fine.
1343 if (len > 0 && buf[len-1] == '\0') {
1347 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1348 returning the text "unknown" from the readlink rather than the path
1349 to the executable (or returning an error from the readlink). Any valid
1350 path has a '/' in it somewhere, so use that to validate the result.
1351 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1353 if (len > 0 && memchr(buf, '/', len)) {
1354 sv_setpvn(sv,buf,len);
1360 #endif /* HAS_PROCSELFEXE */
1363 S_set_caret_X(pTHX) {
1364 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1366 #ifdef HAS_PROCSELFEXE
1367 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1370 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1372 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1379 =for apidoc perl_parse
1381 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1387 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1394 PERL_UNUSED_VAR(my_perl);
1396 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1399 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1400 setuid perl scripts securely.\n");
1401 #endif /* IAMSUID */
1404 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1405 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1406 * This MUST be done before any hash stores or fetches take place.
1407 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1408 * yourself, it is your responsibility to provide a good random seed!
1409 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1410 if (!PL_rehash_seed_set)
1411 PL_rehash_seed = get_hash_seed();
1413 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1415 if (s && (atoi(s) == 1))
1416 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1418 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1424 /* Set PL_origalen be the sum of the contiguous argv[]
1425 * elements plus the size of the env in case that it is
1426 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1427 * as the maximum modifiable length of $0. In the worst case
1428 * the area we are able to modify is limited to the size of
1429 * the original argv[0]. (See below for 'contiguous', though.)
1431 const char *s = NULL;
1434 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1435 /* Do the mask check only if the args seem like aligned. */
1437 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1439 /* See if all the arguments are contiguous in memory. Note
1440 * that 'contiguous' is a loose term because some platforms
1441 * align the argv[] and the envp[]. If the arguments look
1442 * like non-aligned, assume that they are 'strictly' or
1443 * 'traditionally' contiguous. If the arguments look like
1444 * aligned, we just check that they are within aligned
1445 * PTRSIZE bytes. As long as no system has something bizarre
1446 * like the argv[] interleaved with some other data, we are
1447 * fine. (Did I just evoke Murphy's Law?) --jhi */
1448 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1450 for (i = 1; i < PL_origargc; i++) {
1451 if ((PL_origargv[i] == s + 1
1453 || PL_origargv[i] == s + 2
1458 (PL_origargv[i] > s &&
1460 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1470 /* Can we grab env area too to be used as the area for $0? */
1471 if (PL_origenviron) {
1472 if ((PL_origenviron[0] == s + 1
1474 || (PL_origenviron[0] == s + 9 && (s += 8))
1479 (PL_origenviron[0] > s &&
1480 PL_origenviron[0] <=
1481 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1485 s = PL_origenviron[0];
1488 my_setenv("NoNe SuCh", Nullch);
1489 /* Force copy of environment. */
1490 for (i = 1; PL_origenviron[i]; i++) {
1491 if (PL_origenviron[i] == s + 1
1494 (PL_origenviron[i] > s &&
1495 PL_origenviron[i] <=
1496 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1499 s = PL_origenviron[i];
1507 PL_origalen = s - PL_origargv[0] + 1;
1512 /* Come here if running an undumped a.out. */
1514 PL_origfilename = savepv(argv[0]);
1515 PL_do_undump = FALSE;
1516 cxstack_ix = -1; /* start label stack again */
1518 assert (!PL_tainted);
1520 S_set_caret_X(aTHX);
1522 init_postdump_symbols(argc,argv,env);
1527 op_free(PL_main_root);
1528 PL_main_root = Nullop;
1530 PL_main_start = Nullop;
1531 SvREFCNT_dec(PL_main_cv);
1532 PL_main_cv = Nullcv;
1535 oldscope = PL_scopestack_ix;
1536 PL_dowarn = G_WARN_OFF;
1541 parse_body(env,xsinit);
1543 call_list(oldscope, PL_checkav);
1550 /* my_exit() was called */
1551 while (PL_scopestack_ix > oldscope)
1554 PL_curstash = PL_defstash;
1556 call_list(oldscope, PL_checkav);
1557 ret = STATUS_NATIVE_EXPORT;
1560 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1569 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1572 int argc = PL_origargc;
1573 char **argv = PL_origargv;
1574 const char *scriptname = NULL;
1575 VOL bool dosearch = FALSE;
1576 const char *validarg = "";
1579 const char *cddir = Nullch;
1580 #ifdef USE_SITECUSTOMIZE
1581 bool minus_f = FALSE;
1586 sv_setpvn(PL_linestr,"",0);
1587 sv = newSVpvn("",0); /* first used for -I flags */
1591 for (argc--,argv++; argc > 0; argc--,argv++) {
1592 if (argv[0][0] != '-' || !argv[0][1])
1596 validarg = " PHOOEY ";
1600 * Can we rely on the kernel to start scripts with argv[1] set to
1601 * contain all #! line switches (the whole line)? (argv[0] is set to
1602 * the interpreter name, argv[2] to the script name; argv[3] and
1603 * above may contain other arguments.)
1610 #ifndef PERL_STRICT_CR
1635 if ((s = moreswitches(s)))
1640 CHECK_MALLOC_TOO_LATE_FOR('t');
1641 if( !PL_tainting ) {
1642 PL_taint_warn = TRUE;
1648 CHECK_MALLOC_TOO_LATE_FOR('T');
1650 PL_taint_warn = FALSE;
1655 #ifdef MACOS_TRADITIONAL
1656 /* ignore -e for Dev:Pseudo argument */
1657 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1662 PL_e_script = newSVpvn("",0);
1663 filter_add(read_e_script, NULL);
1666 sv_catpv(PL_e_script, s);
1668 sv_catpv(PL_e_script, argv[1]);
1672 Perl_croak(aTHX_ "No code specified for -e");
1673 sv_catpv(PL_e_script, "\n");
1677 #ifdef USE_SITECUSTOMIZE
1683 case 'I': /* -I handled both here and in moreswitches() */
1685 if (!*++s && (s=argv[1]) != Nullch) {
1690 STRLEN len = strlen(s);
1691 p = savepvn(s, len);
1692 incpush(p, TRUE, TRUE, FALSE, FALSE);
1693 sv_catpvn(sv, "-I", 2);
1694 sv_catpvn(sv, p, len);
1695 sv_catpvn(sv, " ", 1);
1699 Perl_croak(aTHX_ "No directory specified for -I");
1703 PL_preprocess = TRUE;
1716 PL_preambleav = newAV();
1717 av_push(PL_preambleav,
1718 newSVpv("use Config;",0));
1722 opts_prog = newSVpv("print Config::myconfig(),",0);
1724 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1726 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1728 opts = SvCUR(opts_prog);
1730 sv_catpv(opts_prog,"\" Compile-time options:");
1732 sv_catpv(opts_prog," DEBUGGING");
1734 # ifdef MULTIPLICITY
1735 sv_catpv(opts_prog," MULTIPLICITY");
1737 # ifdef USE_5005THREADS
1738 sv_catpv(opts_prog," USE_5005THREADS");
1740 # ifdef USE_ITHREADS
1741 sv_catpv(opts_prog," USE_ITHREADS");
1743 # ifdef USE_64_BIT_INT
1744 sv_catpv(opts_prog," USE_64_BIT_INT");
1746 # ifdef USE_64_BIT_ALL
1747 sv_catpv(opts_prog," USE_64_BIT_ALL");
1749 # ifdef USE_LONG_DOUBLE
1750 sv_catpv(opts_prog," USE_LONG_DOUBLE");
1752 # ifdef USE_LARGE_FILES
1753 sv_catpv(opts_prog," USE_LARGE_FILES");
1756 sv_catpv(opts_prog," USE_SOCKS");
1758 # ifdef USE_SITECUSTOMIZE
1759 sv_catpv(opts_prog," USE_SITECUSTOMIZE");
1761 # ifdef PERL_IMPLICIT_CONTEXT
1762 sv_catpv(opts_prog," PERL_IMPLICIT_CONTEXT");
1764 # ifdef PERL_IMPLICIT_SYS
1765 sv_catpv(opts_prog," PERL_IMPLICIT_SYS");
1768 while (SvCUR(opts_prog) > opts+76) {
1769 /* find last space after "options: " and before col 76
1773 char *pv = SvPV_nolen(opts_prog);
1774 const char c = pv[opts+76];
1776 space = strrchr(pv+opts+26, ' ');
1778 if (!space) break; /* "Can't happen" */
1780 /* break the line before that space */
1783 sv_insert(opts_prog, opts, 0,
1787 sv_catpv(opts_prog,"\\n\",");
1789 #if defined(LOCAL_PATCH_COUNT)
1790 if (LOCAL_PATCH_COUNT > 0) {
1793 "\" Locally applied patches:\\n\",");
1794 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1795 if (PL_localpatches[i])
1796 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1797 0, PL_localpatches[i], 0);
1801 Perl_sv_catpvf(aTHX_ opts_prog,
1802 "\" Built under %s\\n\"",OSNAME);
1805 Perl_sv_catpvf(aTHX_ opts_prog,
1806 ",\" Compiled at %s %s\\n\"",__DATE__,
1809 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1813 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1814 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1815 "sort grep {/^PERL/} keys %ENV; ");
1818 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1821 "print \" \\%ENV:\\n @env\\n\" if @env;"
1822 "print \" \\@INC:\\n @INC\\n\";");
1826 opts_prog = Perl_newSVpvf(aTHX_
1827 "Config::config_vars(qw%c%s%c)",
1831 av_push(PL_preambleav, opts_prog);
1832 /* don't look for script or read stdin */
1833 scriptname = BIT_BUCKET;
1837 PL_doextract = TRUE;
1845 if (!*++s || isSPACE(*s)) {
1849 /* catch use of gnu style long options */
1850 if (strEQ(s, "version")) {
1854 if (strEQ(s, "help")) {
1861 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1867 #ifndef SECURE_INTERNAL_GETENV
1870 (s = PerlEnv_getenv("PERL5OPT")))
1872 const char *popt = s;
1875 if (*s == '-' && *(s+1) == 'T') {
1876 CHECK_MALLOC_TOO_LATE_FOR('T');
1878 PL_taint_warn = FALSE;
1881 char *popt_copy = Nullch;
1894 if (!strchr("DIMUdmtwA", *s))
1895 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1899 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1900 s = popt_copy + (s - popt);
1901 d = popt_copy + (d - popt);
1908 if( !PL_tainting ) {
1909 PL_taint_warn = TRUE;
1919 #ifdef USE_SITECUSTOMIZE
1922 PL_preambleav = newAV();
1923 av_unshift(PL_preambleav, 1);
1924 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1928 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1929 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1933 scriptname = argv[0];
1936 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1938 else if (scriptname == Nullch) {
1940 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1946 /* Set $^X early so that it can be used for relocatable paths in @INC */
1947 assert (!PL_tainted);
1949 S_set_caret_X(aTHX);
1953 open_script(scriptname,dosearch,sv);
1955 validate_suid(validarg, scriptname);
1958 #if defined(SIGCHLD) || defined(SIGCLD)
1961 # define SIGCHLD SIGCLD
1963 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1964 if (sigstate == SIG_IGN) {
1965 if (ckWARN(WARN_SIGNAL))
1966 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1967 "Can't ignore signal CHLD, forcing to default");
1968 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1974 #ifdef MACOS_TRADITIONAL
1975 if (PL_doextract || gMacPerl_AlwaysExtract) {
1980 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
1981 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1985 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1986 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1987 CvUNIQUE_on(PL_compcv);
1989 CvPADLIST(PL_compcv) = pad_new(0);
1990 #ifdef USE_5005THREADS
1991 CvOWNER(PL_compcv) = 0;
1992 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1993 MUTEX_INIT(CvMUTEXP(PL_compcv));
1994 #endif /* USE_5005THREADS */
1997 boot_core_UNIVERSAL();
1998 boot_core_xsutils();
2001 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2003 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2009 # ifdef HAS_SOCKS5_INIT
2010 socks5_init(argv[0]);
2016 init_predump_symbols();
2017 /* init_postdump_symbols not currently designed to be called */
2018 /* more than once (ENV isn't cleared first, for example) */
2019 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2021 init_postdump_symbols(argc,argv,env);
2023 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2024 * or explicitly in some platforms.
2025 * locale.c:Perl_init_i18nl10n() if the environment
2026 * look like the user wants to use UTF-8. */
2027 #if defined(SYMBIAN)
2028 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2031 /* Requires init_predump_symbols(). */
2032 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2037 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2038 * and the default open disciplines. */
2039 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2040 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2042 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2043 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2044 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2046 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2047 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2048 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2050 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2051 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2052 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2053 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2054 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2057 sv_setpvn(sv, ":utf8\0:utf8", 11);
2059 sv_setpvn(sv, ":utf8\0", 6);
2062 sv_setpvn(sv, "\0:utf8", 6);
2068 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2069 if (strEQ(s, "unsafe"))
2070 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2071 else if (strEQ(s, "safe"))
2072 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2074 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2079 /* now parse the script */
2081 SETERRNO(0,SS_NORMAL);
2083 #ifdef MACOS_TRADITIONAL
2084 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2086 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2088 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2089 MacPerl_MPWFileName(PL_origfilename));
2093 if (yyparse() || PL_error_count) {
2095 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2097 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2102 CopLINE_set(PL_curcop, 0);
2103 PL_curstash = PL_defstash;
2104 PL_preprocess = FALSE;
2106 SvREFCNT_dec(PL_e_script);
2107 PL_e_script = Nullsv;
2114 SAVECOPFILE(PL_curcop);
2115 SAVECOPLINE(PL_curcop);
2116 gv_check(PL_defstash);
2123 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2124 dump_mstats("after compilation:");
2133 =for apidoc perl_run
2135 Tells a Perl interpreter to run. See L<perlembed>.
2147 PERL_UNUSED_ARG(my_perl);
2149 oldscope = PL_scopestack_ix;
2157 cxstack_ix = -1; /* start context stack again */
2159 case 0: /* normal completion */
2163 case 2: /* my_exit() */
2164 while (PL_scopestack_ix > oldscope)
2167 PL_curstash = PL_defstash;
2168 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2169 PL_endav && !PL_minus_c)
2170 call_list(oldscope, PL_endav);
2172 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2173 dump_mstats("after execution: ");
2175 ret = STATUS_NATIVE_EXPORT;
2179 POPSTACK_TO(PL_mainstack);
2182 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2194 S_run_body(pTHX_ I32 oldscope)
2196 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2197 PL_sawampersand ? "Enabling" : "Omitting"));
2199 if (!PL_restartop) {
2200 DEBUG_x(dump_all());
2202 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2203 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2207 #ifdef MACOS_TRADITIONAL
2208 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2209 (gMacPerl_ErrorFormat ? "# " : ""),
2210 MacPerl_MPWFileName(PL_origfilename));
2212 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2216 if (PERLDB_SINGLE && PL_DBsingle)
2217 sv_setiv(PL_DBsingle, 1);
2219 call_list(oldscope, PL_initav);
2225 PL_op = PL_restartop;
2229 else if (PL_main_start) {
2230 CvDEPTH(PL_main_cv) = 1;
2231 PL_op = PL_main_start;
2239 =head1 SV Manipulation Functions
2241 =for apidoc p||get_sv
2243 Returns the SV of the specified Perl scalar. If C<create> is set and the
2244 Perl variable does not exist then it will be created. If C<create> is not
2245 set and the variable does not exist then NULL is returned.
2251 Perl_get_sv(pTHX_ const char *name, I32 create)
2254 #ifdef USE_5005THREADS
2255 if (name[1] == '\0' && !isALPHA(name[0])) {
2256 PADOFFSET tmp = find_threadsv(name);
2257 if (tmp != NOT_IN_PAD)
2258 return THREADSV(tmp);
2260 #endif /* USE_5005THREADS */
2261 gv = gv_fetchpv(name, create, SVt_PV);
2268 =head1 Array Manipulation Functions
2270 =for apidoc p||get_av
2272 Returns the AV of the specified Perl array. If C<create> is set and the
2273 Perl variable does not exist then it will be created. If C<create> is not
2274 set and the variable does not exist then NULL is returned.
2280 Perl_get_av(pTHX_ const char *name, I32 create)
2282 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2291 =head1 Hash Manipulation Functions
2293 =for apidoc p||get_hv
2295 Returns the HV of the specified Perl hash. If C<create> is set and the
2296 Perl variable does not exist then it will be created. If C<create> is not
2297 set and the variable does not exist then NULL is returned.
2303 Perl_get_hv(pTHX_ const char *name, I32 create)
2305 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
2314 =head1 CV Manipulation Functions
2316 =for apidoc p||get_cv
2318 Returns the CV of the specified Perl subroutine. If C<create> is set and
2319 the Perl subroutine does not exist then it will be declared (which has the
2320 same effect as saying C<sub name;>). If C<create> is not set and the
2321 subroutine does not exist then NULL is returned.
2327 Perl_get_cv(pTHX_ const char *name, I32 create)
2329 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2330 /* XXX unsafe for threads if eval_owner isn't held */
2331 /* XXX this is probably not what they think they're getting.
2332 * It has the same effect as "sub name;", i.e. just a forward
2334 if (create && !GvCVu(gv))
2335 return newSUB(start_subparse(FALSE, 0),
2336 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2344 /* Be sure to refetch the stack pointer after calling these routines. */
2348 =head1 Callback Functions
2350 =for apidoc p||call_argv
2352 Performs a callback to the specified Perl sub. See L<perlcall>.
2358 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2360 /* See G_* flags in cop.h */
2361 /* null terminated arg list */
2368 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2373 return call_pv(sub_name, flags);
2377 =for apidoc p||call_pv
2379 Performs a callback to the specified Perl sub. See L<perlcall>.
2385 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2386 /* name of the subroutine */
2387 /* See G_* flags in cop.h */
2389 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2393 =for apidoc p||call_method
2395 Performs a callback to the specified Perl method. The blessed object must
2396 be on the stack. See L<perlcall>.
2402 Perl_call_method(pTHX_ const char *methname, I32 flags)
2403 /* name of the subroutine */
2404 /* See G_* flags in cop.h */
2406 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2409 /* May be called with any of a CV, a GV, or an SV containing the name. */
2411 =for apidoc p||call_sv
2413 Performs a callback to the Perl sub whose name is in the SV. See
2420 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2421 /* See G_* flags in cop.h */
2424 LOGOP myop; /* fake syntax tree node */
2427 volatile I32 retval = 0;
2429 bool oldcatch = CATCH_GET;
2434 if (flags & G_DISCARD) {
2439 Zero(&myop, 1, LOGOP);
2440 myop.op_next = Nullop;
2441 if (!(flags & G_NOARGS))
2442 myop.op_flags |= OPf_STACKED;
2443 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2444 (flags & G_ARRAY) ? OPf_WANT_LIST :
2449 EXTEND(PL_stack_sp, 1);
2450 *++PL_stack_sp = sv;
2452 oldscope = PL_scopestack_ix;
2454 if (PERLDB_SUB && PL_curstash != PL_debstash
2455 /* Handle first BEGIN of -d. */
2456 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2457 /* Try harder, since this may have been a sighandler, thus
2458 * curstash may be meaningless. */
2459 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2460 && !(flags & G_NODEBUG))
2461 PL_op->op_private |= OPpENTERSUB_DB;
2463 if (flags & G_METHOD) {
2464 Zero(&method_op, 1, UNOP);
2465 method_op.op_next = PL_op;
2466 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2467 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2468 PL_op = (OP*)&method_op;
2471 if (!(flags & G_EVAL)) {
2473 call_body((OP*)&myop, FALSE);
2474 retval = PL_stack_sp - (PL_stack_base + oldmark);
2475 CATCH_SET(oldcatch);
2478 myop.op_other = (OP*)&myop;
2480 /* we're trying to emulate pp_entertry() here */
2482 register PERL_CONTEXT *cx;
2483 const I32 gimme = GIMME_V;
2488 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2490 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2492 PL_in_eval = EVAL_INEVAL;
2493 if (flags & G_KEEPERR)
2494 PL_in_eval |= EVAL_KEEPERR;
2496 sv_setpvn(ERRSV,"",0);
2504 call_body((OP*)&myop, FALSE);
2505 retval = PL_stack_sp - (PL_stack_base + oldmark);
2506 if (!(flags & G_KEEPERR))
2507 sv_setpvn(ERRSV,"",0);
2513 /* my_exit() was called */
2514 PL_curstash = PL_defstash;
2517 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2518 Perl_croak(aTHX_ "Callback called exit");
2523 PL_op = PL_restartop;
2527 PL_stack_sp = PL_stack_base + oldmark;
2528 if (flags & G_ARRAY)
2532 *++PL_stack_sp = &PL_sv_undef;
2537 if (PL_scopestack_ix > oldscope) {
2541 register PERL_CONTEXT *cx;
2548 PERL_UNUSED_VAR(newsp);
2549 PERL_UNUSED_VAR(gimme);
2550 PERL_UNUSED_VAR(optype);
2555 if (flags & G_DISCARD) {
2556 PL_stack_sp = PL_stack_base + oldmark;
2566 S_call_body(pTHX_ const OP *myop, bool is_eval)
2568 if (PL_op == myop) {
2570 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2572 PL_op = Perl_pp_entersub(aTHX); /* this does */
2578 /* Eval a string. The G_EVAL flag is always assumed. */
2581 =for apidoc p||eval_sv
2583 Tells Perl to C<eval> the string in the SV.
2589 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2591 /* See G_* flags in cop.h */
2594 UNOP myop; /* fake syntax tree node */
2595 volatile I32 oldmark = SP - PL_stack_base;
2596 volatile I32 retval = 0;
2601 if (flags & G_DISCARD) {
2608 Zero(PL_op, 1, UNOP);
2609 EXTEND(PL_stack_sp, 1);
2610 *++PL_stack_sp = sv;
2612 if (!(flags & G_NOARGS))
2613 myop.op_flags = OPf_STACKED;
2614 myop.op_next = Nullop;
2615 myop.op_type = OP_ENTEREVAL;
2616 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2617 (flags & G_ARRAY) ? OPf_WANT_LIST :
2619 if (flags & G_KEEPERR)
2620 myop.op_flags |= OPf_SPECIAL;
2622 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2623 * before a PUSHEVAL, which corrupts the stack after a croak */
2624 TAINT_PROPER("eval_sv()");
2630 call_body((OP*)&myop,TRUE);
2631 retval = PL_stack_sp - (PL_stack_base + oldmark);
2632 if (!(flags & G_KEEPERR))
2633 sv_setpvn(ERRSV,"",0);
2639 /* my_exit() was called */
2640 PL_curstash = PL_defstash;
2643 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2644 Perl_croak(aTHX_ "Callback called exit");
2649 PL_op = PL_restartop;
2653 PL_stack_sp = PL_stack_base + oldmark;
2654 if (flags & G_ARRAY)
2658 *++PL_stack_sp = &PL_sv_undef;
2664 if (flags & G_DISCARD) {
2665 PL_stack_sp = PL_stack_base + oldmark;
2675 =for apidoc p||eval_pv
2677 Tells Perl to C<eval> the given string and return an SV* result.
2683 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2686 SV* sv = newSVpv(p, 0);
2688 eval_sv(sv, G_SCALAR);
2695 if (croak_on_error && SvTRUE(ERRSV)) {
2696 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2702 /* Require a module. */
2705 =head1 Embedding Functions
2707 =for apidoc p||require_pv
2709 Tells Perl to C<require> the file named by the string argument. It is
2710 analogous to the Perl code C<eval "require '$file'">. It's even
2711 implemented that way; consider using load_module instead.
2716 Perl_require_pv(pTHX_ const char *pv)
2720 PUSHSTACKi(PERLSI_REQUIRE);
2722 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2723 eval_sv(sv_2mortal(sv), G_DISCARD);
2729 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2733 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2734 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2738 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2740 /* This message really ought to be max 23 lines.
2741 * Removed -h because the user already knows that option. Others? */
2743 static const char * const usage_msg[] = {
2744 "-0[octal] specify record separator (\\0, if no argument)",
2745 "-A[mod][=pattern] activate all/given assertions",
2746 "-a autosplit mode with -n or -p (splits $_ into @F)",
2747 "-C[number/list] enables the listed Unicode features",
2748 "-c check syntax only (runs BEGIN and CHECK blocks)",
2749 "-d[:debugger] run program under debugger",
2750 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2751 "-e program one line of program (several -e's allowed, omit programfile)",
2752 "-f don't do $sitelib/sitecustomize.pl at startup",
2753 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2754 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2755 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2756 "-l[octal] enable line ending processing, specifies line terminator",
2757 "-[mM][-]module execute \"use/no module...\" before executing program",
2758 "-n assume \"while (<>) { ... }\" loop around program",
2759 "-p assume loop like -n but print line also, like sed",
2760 "-P run program through C preprocessor before compilation",
2761 "-s enable rudimentary parsing for switches after programfile",
2762 "-S look for programfile using PATH environment variable",
2763 "-t enable tainting warnings",
2764 "-T enable tainting checks",
2765 "-u dump core after parsing program",
2766 "-U allow unsafe operations",
2767 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2768 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2769 "-w enable many useful warnings (RECOMMENDED)",
2770 "-W enable all warnings",
2771 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2772 "-X disable all warnings",
2776 const char * const *p = usage_msg;
2778 PerlIO_printf(PerlIO_stdout(),
2779 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2782 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2785 /* convert a string of -D options (or digits) into an int.
2786 * sets *s to point to the char after the options */
2790 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2792 static const char * const usage_msgd[] = {
2793 " Debugging flag values: (see also -d)",
2794 " p Tokenizing and parsing (with v, displays parse stack)",
2795 " s Stack snapshots (with v, displays all stacks)",
2796 " l Context (loop) stack processing",
2797 " t Trace execution",
2798 " o Method and overloading resolution",
2799 " c String/numeric conversions",
2800 " P Print profiling info, preprocessor command for -P, source file input state",
2801 " m Memory allocation",
2802 " f Format processing",
2803 " r Regular expression parsing and execution",
2804 " x Syntax tree dump",
2805 " u Tainting checks",
2806 " H Hash dump -- usurps values()",
2807 " X Scratchpad allocation",
2809 " S Thread synchronization",
2811 " R Include reference counts of dumped variables (eg when using -Ds)",
2812 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2813 " v Verbose: use in conjunction with other flags",
2815 " A Consistency checks on internal structures",
2816 " q quiet - currently only suppresses the 'EXECUTING' message",
2821 /* if adding extra options, remember to update DEBUG_MASK */
2822 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2824 for (; isALNUM(**s); (*s)++) {
2825 const char *d = strchr(debopts,**s);
2827 i |= 1 << (d - debopts);
2828 else if (ckWARN_d(WARN_DEBUGGING))
2829 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2830 "invalid option -D%c, use -D'' to see choices\n", **s);
2833 else if (isDIGIT(**s)) {
2835 for (; isALNUM(**s); (*s)++) ;
2837 else if (givehelp) {
2838 char **p = (char **)usage_msgd;
2839 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2842 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2843 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2844 "-Dp not implemented on this platform\n");
2850 /* This routine handles any switches that can be given during run */
2853 Perl_moreswitches(pTHX_ char *s)
2864 SvREFCNT_dec(PL_rs);
2865 if (s[1] == 'x' && s[2]) {
2866 const char *e = s+=2;
2872 flags = PERL_SCAN_SILENT_ILLDIGIT;
2873 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2874 if (s + numlen < e) {
2875 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2879 PL_rs = newSVpvn("", 0);
2880 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2881 tmps = (U8*)SvPVX(PL_rs);
2882 uvchr_to_utf8(tmps, rschar);
2883 SvCUR_set(PL_rs, UNISKIP(rschar));
2888 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2889 if (rschar & ~((U8)~0))
2890 PL_rs = &PL_sv_undef;
2891 else if (!rschar && numlen >= 2)
2892 PL_rs = newSVpvn("", 0);
2894 char ch = (char)rschar;
2895 PL_rs = newSVpvn(&ch, 1);
2898 sv_setsv(get_sv("/", TRUE), PL_rs);
2903 PL_unicode = parse_unicode_opts( (const char **)&s );
2908 while (*s && !isSPACE(*s)) ++s;
2910 PL_splitstr = savepv(PL_splitstr);
2924 /* -dt indicates to the debugger that threads will be used */
2925 if (*s == 't' && !isALNUM(s[1])) {
2927 my_setenv("PERL5DB_THREADED", "1");
2930 /* The following permits -d:Mod to accepts arguments following an =
2931 in the fashion that -MSome::Mod does. */
2932 if (*s == ':' || *s == '=') {
2935 sv = newSVpv("use Devel::", 0);
2937 /* We now allow -d:Module=Foo,Bar */
2938 while(isALNUM(*s) || *s==':') ++s;
2940 sv_catpv(sv, start);
2942 sv_catpvn(sv, start, s-start);
2943 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
2946 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2949 PL_perldb = PERLDB_ALL;
2958 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
2959 #else /* !DEBUGGING */
2960 if (ckWARN_d(WARN_DEBUGGING))
2961 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2962 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
2963 for (s++; isALNUM(*s); s++) ;
2968 usage(PL_origargv[0]);
2972 Safefree(PL_inplace);
2973 #if defined(__CYGWIN__) /* do backup extension automagically */
2974 if (*(s+1) == '\0') {
2975 PL_inplace = savepv(".bak");
2978 #endif /* __CYGWIN__ */
2979 PL_inplace = savepv(s+1);
2980 for (s = PL_inplace; *s && !isSPACE(*s); s++)
2984 if (*s == '-') /* Additional switches on #! line. */
2988 case 'I': /* -I handled both here and in parse_body() */
2991 while (*s && isSPACE(*s))
2996 /* ignore trailing spaces (possibly followed by other switches) */
2998 for (e = p; *e && !isSPACE(*e); e++) ;
3002 } while (*p && *p != '-');
3003 e = savepvn(s, e-s);
3004 incpush(e, TRUE, TRUE, FALSE, FALSE);
3011 Perl_croak(aTHX_ "No directory specified for -I");
3017 SvREFCNT_dec(PL_ors_sv);
3023 PL_ors_sv = newSVpvn("\n",1);
3024 numlen = 3 + (*s == '0');
3025 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3029 if (RsPARA(PL_rs)) {
3030 PL_ors_sv = newSVpvn("\n\n",2);
3033 PL_ors_sv = newSVsv(PL_rs);
3040 PL_preambleav = newAV();
3044 SV *sv = newSVpv("use assertions::activate", 24);
3045 while(isALNUM(*s) || *s == ':') ++s;
3047 sv_catpvn(sv, "::", 2);
3048 sv_catpvn(sv, start, s-start);
3051 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3054 else if (*s != '\0') {
3055 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3057 av_push(PL_preambleav, sv);
3061 forbid_setid("-M"); /* XXX ? */
3064 forbid_setid("-m"); /* XXX ? */
3068 const char *use = "use ";
3069 /* -M-foo == 'no foo' */
3070 /* Leading space on " no " is deliberate, to make both
3071 possibilities the same length. */
3072 if (*s == '-') { use = " no "; ++s; }
3073 sv = newSVpvn(use,4);
3075 /* We allow -M'Module qw(Foo Bar)' */
3076 while(isALNUM(*s) || *s==':') ++s;
3078 sv_catpv(sv, start);
3079 if (*(start-1) == 'm') {
3081 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3082 sv_catpv( sv, " ()");
3086 Perl_croak(aTHX_ "Module name required with -%c option",
3088 sv_catpvn(sv, start, s-start);
3089 sv_catpv(sv, " split(/,/,q");
3090 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3092 sv_catpvn(sv, "\0)", 2);
3096 PL_preambleav = newAV();
3097 av_push(PL_preambleav, sv);
3100 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3112 PL_doswitches = TRUE;
3126 #ifdef MACOS_TRADITIONAL
3127 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3129 PL_do_undump = TRUE;
3137 if (!sv_derived_from(PL_patchlevel, "version"))
3138 (void *)upg_version(PL_patchlevel);
3140 PerlIO_printf(PerlIO_stdout(),
3141 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3142 vstringify(PL_patchlevel),
3145 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3146 PerlIO_printf(PerlIO_stdout(),
3147 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3148 vstringify(PL_patchlevel)));
3149 PerlIO_printf(PerlIO_stdout(),
3150 Perl_form(aTHX_ " built under %s at %s %s\n",
3151 OSNAME, __DATE__, __TIME__));
3152 PerlIO_printf(PerlIO_stdout(),
3153 Perl_form(aTHX_ " OS Specific Release: %s\n",
3157 #if defined(LOCAL_PATCH_COUNT)
3158 if (LOCAL_PATCH_COUNT > 0)
3159 PerlIO_printf(PerlIO_stdout(),
3160 "\n(with %d registered patch%s, "
3161 "see perl -V for more detail)",
3162 (int)LOCAL_PATCH_COUNT,
3163 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3166 PerlIO_printf(PerlIO_stdout(),
3167 "\n\nCopyright 1987-2005, Larry Wall\n");
3168 #ifdef MACOS_TRADITIONAL
3169 PerlIO_printf(PerlIO_stdout(),
3170 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3171 "maintained by Chris Nandor\n");
3174 PerlIO_printf(PerlIO_stdout(),
3175 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3178 PerlIO_printf(PerlIO_stdout(),
3179 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3180 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3183 PerlIO_printf(PerlIO_stdout(),
3184 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3185 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3188 PerlIO_printf(PerlIO_stdout(),
3189 "atariST series port, ++jrb bammi@cadence.com\n");
3192 PerlIO_printf(PerlIO_stdout(),
3193 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3196 PerlIO_printf(PerlIO_stdout(),
3197 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3200 PerlIO_printf(PerlIO_stdout(),
3201 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3204 PerlIO_printf(PerlIO_stdout(),
3205 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3208 PerlIO_printf(PerlIO_stdout(),
3209 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3212 PerlIO_printf(PerlIO_stdout(),
3213 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3216 PerlIO_printf(PerlIO_stdout(),
3217 "MiNT port by Guido Flohr, 1997-1999\n");
3220 PerlIO_printf(PerlIO_stdout(),
3221 "EPOC port by Olaf Flebbe, 1999-2002\n");
3224 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3225 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3229 PerlIO_printf(PerlIO_stdout(),
3230 "Symbian port by Nokia, 2004-2005\n");
3232 #ifdef BINARY_BUILD_NOTICE
3233 BINARY_BUILD_NOTICE;
3235 PerlIO_printf(PerlIO_stdout(),
3237 Perl may be copied only under the terms of either the Artistic License or the\n\
3238 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3239 Complete documentation for Perl, including FAQ lists, should be found on\n\
3240 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3241 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3244 if (! (PL_dowarn & G_WARN_ALL_MASK))
3245 PL_dowarn |= G_WARN_ON;
3249 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3250 if (!specialWARN(PL_compiling.cop_warnings))
3251 SvREFCNT_dec(PL_compiling.cop_warnings);
3252 PL_compiling.cop_warnings = pWARN_ALL ;
3256 PL_dowarn = G_WARN_ALL_OFF;
3257 if (!specialWARN(PL_compiling.cop_warnings))
3258 SvREFCNT_dec(PL_compiling.cop_warnings);
3259 PL_compiling.cop_warnings = pWARN_NONE ;
3264 if (s[1] == '-') /* Additional switches on #! line. */
3269 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3275 #ifdef ALTERNATE_SHEBANG
3276 case 'S': /* OS/2 needs -S on "extproc" line. */
3284 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3289 /* compliments of Tom Christiansen */
3291 /* unexec() can be found in the Gnu emacs distribution */
3292 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3295 Perl_my_unexec(pTHX)
3303 prog = newSVpv(BIN_EXP, 0);
3304 sv_catpv(prog, "/perl");
3305 file = newSVpv(PL_origfilename, 0);
3306 sv_catpv(file, ".perldump");
3308 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3309 /* unexec prints msg to stderr in case of failure */
3310 PerlProc_exit(status);
3313 # include <lib$routines.h>
3314 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3316 ABORT(); /* for use with undump */
3321 /* initialize curinterp */
3327 # define PERLVAR(var,type)
3328 # define PERLVARA(var,n,type)
3329 # if defined(PERL_IMPLICIT_CONTEXT)
3330 # if defined(USE_5005THREADS)
3331 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3332 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3333 # else /* !USE_5005THREADS */
3334 # define PERLVARI(var,type,init) aTHX->var = init;
3335 # define PERLVARIC(var,type,init) aTHX->var = init;
3336 # endif /* USE_5005THREADS */
3338 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3339 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3341 # include "intrpvar.h"
3342 # ifndef USE_5005THREADS
3343 # include "thrdvar.h"
3350 # define PERLVAR(var,type)
3351 # define PERLVARA(var,n,type)
3352 # define PERLVARI(var,type,init) PL_##var = init;
3353 # define PERLVARIC(var,type,init) PL_##var = init;
3354 # include "intrpvar.h"
3355 # ifndef USE_5005THREADS
3356 # include "thrdvar.h"
3367 S_init_main_stash(pTHX)
3371 PL_curstash = PL_defstash = newHV();
3372 PL_curstname = newSVpvn("main",4);
3373 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3374 SvREFCNT_dec(GvHV(gv));
3375 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3377 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3378 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3379 GvMULTI_on(PL_incgv);
3380 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3381 GvMULTI_on(PL_hintgv);
3382 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3383 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3384 GvMULTI_on(PL_errgv);
3385 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3386 GvMULTI_on(PL_replgv);
3387 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3388 #ifdef PERL_DONT_CREATE_GVSV
3391 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3392 sv_setpvn(ERRSV, "", 0);
3393 PL_curstash = PL_defstash;
3394 CopSTASH_set(&PL_compiling, PL_defstash);
3395 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3396 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3397 /* We must init $/ before switches are processed. */
3398 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3401 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3403 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3408 const char *cpp_discard_flag;
3417 PL_origfilename = savepvn("-e", 2);
3420 /* if find_script() returns, it returns a malloc()-ed value */
3421 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3423 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3424 const char *s = scriptname + 8;
3425 PL_fdscript = atoi(s);
3430 * Tell apart "normal" usage of fdscript, e.g.
3431 * with bash on FreeBSD:
3432 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3433 * from usage in suidperl.
3434 * Does any "normal" usage leave garbage after the number???
3435 * Is it a mistake to use a similar /dev/fd/ construct for
3440 * Be supersafe and do some sanity-checks.
3441 * Still, can we be sure we got the right thing?
3444 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3447 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3449 scriptname = savepv(s + 1);
3450 Safefree(PL_origfilename);
3451 PL_origfilename = (char *)scriptname;
3456 CopFILE_free(PL_curcop);
3457 CopFILE_set(PL_curcop, PL_origfilename);
3458 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3459 scriptname = (char *)"";
3460 if (PL_fdscript >= 0) {
3461 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3462 # if defined(HAS_FCNTL) && defined(F_SETFD)
3464 /* ensure close-on-exec */
3465 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3470 Perl_croak(aTHX_ "sperl needs fd script\n"
3471 "You should not call sperl directly; do you need to "
3472 "change a #! line\nfrom sperl to perl?\n");
3475 * Do not open (or do other fancy stuff) while setuid.
3476 * Perl does the open, and hands script to suidperl on a fd;
3477 * suidperl only does some checks, sets up UIDs and re-execs
3478 * perl with that fd as it has always done.
3481 if (PL_suidscript != 1) {
3482 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3485 else if (PL_preprocess) {
3486 const char *cpp_cfg = CPPSTDIN;
3487 SV *cpp = newSVpvn("",0);
3488 SV *cmd = NEWSV(0,0);
3490 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3491 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3492 if (strEQ(cpp_cfg, "cppstdin"))
3493 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3494 sv_catpv(cpp, cpp_cfg);
3497 sv_catpvn(sv, "-I", 2);
3498 sv_catpv(sv,PRIVLIB_EXP);
3501 DEBUG_P(PerlIO_printf(Perl_debug_log,
3502 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3503 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3506 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3513 cpp_discard_flag = "";
3515 cpp_discard_flag = "-C";
3519 perl = os2_execname(aTHX);
3521 perl = PL_origargv[0];
3525 /* This strips off Perl comments which might interfere with
3526 the C pre-processor, including #!. #line directives are
3527 deliberately stripped to avoid confusion with Perl's version
3528 of #line. FWP played some golf with it so it will fit
3529 into VMS's 255 character buffer.
3532 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3534 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3536 Perl_sv_setpvf(aTHX_ cmd, "\
3537 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3538 perl, quote, code, quote, scriptname, cpp,
3539 cpp_discard_flag, sv, CPPMINUS);
3541 PL_doextract = FALSE;
3543 DEBUG_P(PerlIO_printf(Perl_debug_log,
3544 "PL_preprocess: cmd=\"%s\"\n",
3547 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3551 else if (!*scriptname) {
3552 forbid_setid("program input from stdin");
3553 PL_rsfp = PerlIO_stdin();
3556 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3557 # if defined(HAS_FCNTL) && defined(F_SETFD)
3559 /* ensure close-on-exec */
3560 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3563 #endif /* IAMSUID */
3565 /* PSz 16 Sep 03 Keep neat error message */
3566 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3567 CopFILE(PL_curcop), Strerror(errno));
3572 * I_SYSSTATVFS HAS_FSTATVFS
3574 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3575 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3576 * here so that metaconfig picks them up. */
3580 S_fd_on_nosuid_fs(pTHX_ int fd)
3583 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3584 * but is needed also on machines without setreuid.
3585 * Seems safe enough to run as root.
3587 int check_okay = 0; /* able to do all the required sys/libcalls */
3588 int on_nosuid = 0; /* the fd is on a nosuid fs */
3590 * Need to check noexec also: nosuid might not be set, the average
3591 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3593 int on_noexec = 0; /* the fd is on a noexec fs */
3596 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3597 * fstatvfs() is UNIX98.
3598 * fstatfs() is 4.3 BSD.
3599 * ustat()+getmnt() is pre-4.3 BSD.
3600 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3601 * an irrelevant filesystem while trying to reach the right one.
3604 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3606 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3607 defined(HAS_FSTATVFS)
3608 # define FD_ON_NOSUID_CHECK_OKAY
3609 struct statvfs stfs;
3611 check_okay = fstatvfs(fd, &stfs) == 0;
3612 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3614 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3615 on platforms where it is present. */
3616 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3618 # endif /* fstatvfs */
3620 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3621 defined(PERL_MOUNT_NOSUID) && \
3622 defined(PERL_MOUNT_NOEXEC) && \
3623 defined(HAS_FSTATFS) && \
3624 defined(HAS_STRUCT_STATFS) && \
3625 defined(HAS_STRUCT_STATFS_F_FLAGS)
3626 # define FD_ON_NOSUID_CHECK_OKAY
3629 check_okay = fstatfs(fd, &stfs) == 0;
3630 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3631 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3632 # endif /* fstatfs */
3634 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3635 defined(PERL_MOUNT_NOSUID) && \
3636 defined(PERL_MOUNT_NOEXEC) && \
3637 defined(HAS_FSTAT) && \
3638 defined(HAS_USTAT) && \
3639 defined(HAS_GETMNT) && \
3640 defined(HAS_STRUCT_FS_DATA) && \
3642 # define FD_ON_NOSUID_CHECK_OKAY
3645 if (fstat(fd, &fdst) == 0) {
3647 if (ustat(fdst.st_dev, &us) == 0) {
3649 /* NOSTAT_ONE here because we're not examining fields which
3650 * vary between that case and STAT_ONE. */
3651 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3652 size_t cmplen = sizeof(us.f_fname);
3653 if (sizeof(fsd.fd_req.path) < cmplen)
3654 cmplen = sizeof(fsd.fd_req.path);
3655 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3656 fdst.st_dev == fsd.fd_req.dev) {
3658 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3659 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3665 # endif /* fstat+ustat+getmnt */
3667 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3668 defined(HAS_GETMNTENT) && \
3669 defined(HAS_HASMNTOPT) && \
3670 defined(MNTOPT_NOSUID) && \
3671 defined(MNTOPT_NOEXEC)
3672 # define FD_ON_NOSUID_CHECK_OKAY
3673 FILE *mtab = fopen("/etc/mtab", "r");
3674 struct mntent *entry;
3677 if (mtab && (fstat(fd, &stb) == 0)) {
3678 while (entry = getmntent(mtab)) {
3679 if (stat(entry->mnt_dir, &fsb) == 0
3680 && fsb.st_dev == stb.st_dev)
3682 /* found the filesystem */
3684 if (hasmntopt(entry, MNTOPT_NOSUID))
3686 if (hasmntopt(entry, MNTOPT_NOEXEC))
3689 } /* A single fs may well fail its stat(). */
3694 # endif /* getmntent+hasmntopt */
3697 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3699 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3701 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3702 return ((!check_okay) || on_nosuid || on_noexec);
3704 #endif /* IAMSUID */
3707 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3712 #endif /* IAMSUID */
3714 /* do we need to emulate setuid on scripts? */
3716 /* This code is for those BSD systems that have setuid #! scripts disabled
3717 * in the kernel because of a security problem. Merely defining DOSUID
3718 * in perl will not fix that problem, but if you have disabled setuid
3719 * scripts in the kernel, this will attempt to emulate setuid and setgid
3720 * on scripts that have those now-otherwise-useless bits set. The setuid
3721 * root version must be called suidperl or sperlN.NNN. If regular perl
3722 * discovers that it has opened a setuid script, it calls suidperl with
3723 * the same argv that it had. If suidperl finds that the script it has
3724 * just opened is NOT setuid root, it sets the effective uid back to the
3725 * uid. We don't just make perl setuid root because that loses the
3726 * effective uid we had before invoking perl, if it was different from the
3729 * Description/comments above do not match current workings:
3730 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3731 * suidperl called with script open and name changed to /dev/fd/N/X;
3732 * suidperl croaks if script is not setuid;
3733 * making perl setuid would be a huge security risk (and yes, that
3734 * would lose any euid we might have had).
3736 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3737 * be defined in suidperl only. suidperl must be setuid root. The
3738 * Configure script will set this up for you if you want it.
3744 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3745 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3746 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3748 const char *linestr;
3751 if (PL_fdscript < 0 || PL_suidscript != 1)
3752 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3754 * Since the script is opened by perl, not suidperl, some of these
3755 * checks are superfluous. Leaving them in probably does not lower
3759 * Do checks even for systems with no HAS_SETREUID.
3760 * We used to swap, then re-swap UIDs with
3762 if (setreuid(PL_euid,PL_uid) < 0
3763 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3764 Perl_croak(aTHX_ "Can't swap uid and euid");
3767 if (setreuid(PL_uid,PL_euid) < 0
3768 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3769 Perl_croak(aTHX_ "Can't reswap uid and euid");
3773 /* On this access check to make sure the directories are readable,
3774 * there is actually a small window that the user could use to make
3775 * filename point to an accessible directory. So there is a faint
3776 * chance that someone could execute a setuid script down in a
3777 * non-accessible directory. I don't know what to do about that.
3778 * But I don't think it's too important. The manual lies when
3779 * it says access() is useful in setuid programs.
3781 * So, access() is pretty useless... but not harmful... do anyway.
3783 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3784 Perl_croak(aTHX_ "Can't access() script\n");
3787 /* If we can swap euid and uid, then we can determine access rights
3788 * with a simple stat of the file, and then compare device and
3789 * inode to make sure we did stat() on the same file we opened.
3790 * Then we just have to make sure he or she can execute it.
3793 * As the script is opened by perl, not suidperl, we do not need to
3794 * care much about access rights.
3796 * The 'script changed' check is needed, or we can get lied to
3797 * about $0 with e.g.
3798 * suidperl /dev/fd/4//bin/x 4<setuidscript
3799 * Without HAS_SETREUID, is it safe to stat() as root?
3801 * Are there any operating systems that pass /dev/fd/xxx for setuid
3802 * scripts, as suggested/described in perlsec(1)? Surely they do not
3803 * pass the script name as we do, so the "script changed" test would
3804 * fail for them... but we never get here with
3805 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3807 * This is one place where we must "lie" about return status: not
3808 * say if the stat() failed. We are doing this as root, and could
3809 * be tricked into reporting existence or not of files that the
3810 * "plain" user cannot even see.
3814 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3815 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3816 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3817 Perl_croak(aTHX_ "Setuid script changed\n");
3821 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3822 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3825 * We used to do this check as the "plain" user (after swapping
3826 * UIDs). But the check for nosuid and noexec filesystem is needed,
3827 * and should be done even without HAS_SETREUID. (Maybe those
3828 * operating systems do not have such mount options anyway...)
3829 * Seems safe enough to do as root.
3831 #if !defined(NO_NOSUID_CHECK)
3832 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3833 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3836 #endif /* IAMSUID */
3838 if (!S_ISREG(PL_statbuf.st_mode)) {
3839 Perl_croak(aTHX_ "Setuid script not plain file\n");
3841 if (PL_statbuf.st_mode & S_IWOTH)
3842 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3843 PL_doswitches = FALSE; /* -s is insecure in suid */
3844 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3845 CopLINE_inc(PL_curcop);
3846 linestr = SvPV_nolen_const(PL_linestr);
3847 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3848 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3849 Perl_croak(aTHX_ "No #! line");
3853 /* Sanity check on line length */
3854 if (strlen(s) < 1 || strlen(s) > 4000)
3855 Perl_croak(aTHX_ "Very long #! line");
3856 /* Allow more than a single space after #! */
3857 while (isSPACE(*s)) s++;
3858 /* Sanity check on buffer end */
3859 while ((*s) && !isSPACE(*s)) s++;
3860 for (s2 = s; (s2 > linestr &&
3861 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3862 || s2[-1] == '-')); s2--) ;
3863 /* Sanity check on buffer start */
3864 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3865 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3866 Perl_croak(aTHX_ "Not a perl script");
3867 while (*s == ' ' || *s == '\t') s++;
3869 * #! arg must be what we saw above. They can invoke it by
3870 * mentioning suidperl explicitly, but they may not add any strange
3871 * arguments beyond what #! says if they do invoke suidperl that way.
3874 * The way validarg was set up, we rely on the kernel to start
3875 * scripts with argv[1] set to contain all #! line switches (the
3879 * Check that we got all the arguments listed in the #! line (not
3880 * just that there are no extraneous arguments). Might not matter
3881 * much, as switches from #! line seem to be acted upon (also), and
3882 * so may be checked and trapped in perl. But, security checks must
3883 * be done in suidperl and not deferred to perl. Note that suidperl
3884 * does not get around to parsing (and checking) the switches on
3885 * the #! line (but execs perl sooner).
3886 * Allow (require) a trailing newline (which may be of two
3887 * characters on some architectures?) (but no other trailing
3890 len = strlen(validarg);
3891 if (strEQ(validarg," PHOOEY ") ||
3892 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3893 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3894 Perl_croak(aTHX_ "Args must match #! line");
3897 if (PL_fdscript < 0 &&
3898 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3899 PL_euid == PL_statbuf.st_uid)
3901 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3902 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3903 #endif /* IAMSUID */
3905 if (PL_fdscript < 0 &&
3906 PL_euid) { /* oops, we're not the setuid root perl */
3908 * When root runs a setuid script, we do not go through the same
3909 * steps of execing sperl and then perl with fd scripts, but
3910 * simply set up UIDs within the same perl invocation; so do
3911 * not have the same checks (on options, whatever) that we have
3912 * for plain users. No problem really: would have to be a script
3913 * that does not actually work for plain users; and if root is
3914 * foolish and can be persuaded to run such an unsafe script, he
3915 * might run also non-setuid ones, and deserves what he gets.
3917 * Or, we might drop the PL_euid check above (and rely just on
3918 * PL_fdscript to avoid loops), and do the execs
3924 * Pass fd script to suidperl.
3925 * Exec suidperl, substituting fd script for scriptname.
3926 * Pass script name as "subdir" of fd, which perl will grok;
3927 * in fact will use that to distinguish this from "normal"
3928 * usage, see comments above.
3930 PerlIO_rewind(PL_rsfp);
3931 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3932 /* PSz 27 Feb 04 Sanity checks on scriptname */
3933 if ((!scriptname) || (!*scriptname) ) {
3934 Perl_croak(aTHX_ "No setuid script name\n");
3936 if (*scriptname == '-') {
3937 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3938 /* Or we might confuse it with an option when replacing
3939 * name in argument list, below (though we do pointer, not
3940 * string, comparisons).
3943 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3944 if (!PL_origargv[which]) {
3945 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3947 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3948 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3949 #if defined(HAS_FCNTL) && defined(F_SETFD)
3950 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3953 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3954 (int)PERL_REVISION, (int)PERL_VERSION,
3955 (int)PERL_SUBVERSION), PL_origargv);
3957 #endif /* IAMSUID */
3958 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
3961 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3963 * This seems back to front: we try HAS_SETEGID first; if not available
3964 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3965 * in the sense that we only want to set EGID; but are there any machines
3966 * with either of the latter, but not the former? Same with UID, later.
3969 (void)setegid(PL_statbuf.st_gid);
3972 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3974 #ifdef HAS_SETRESGID
3975 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3977 PerlProc_setgid(PL_statbuf.st_gid);
3981 if (PerlProc_getegid() != PL_statbuf.st_gid)
3982 Perl_croak(aTHX_ "Can't do setegid!\n");
3984 if (PL_statbuf.st_mode & S_ISUID) {
3985 if (PL_statbuf.st_uid != PL_euid)
3987 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3990 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3992 #ifdef HAS_SETRESUID
3993 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3995 PerlProc_setuid(PL_statbuf.st_uid);
3999 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4000 Perl_croak(aTHX_ "Can't do seteuid!\n");
4002 else if (PL_uid) { /* oops, mustn't run as root */
4004 (void)seteuid((Uid_t)PL_uid);
4007 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4009 #ifdef HAS_SETRESUID
4010 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4012 PerlProc_setuid((Uid_t)PL_uid);
4016 if (PerlProc_geteuid() != PL_uid)
4017 Perl_croak(aTHX_ "Can't do seteuid!\n");
4020 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4021 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4024 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4025 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4026 else if (PL_fdscript < 0 || PL_suidscript != 1)
4027 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4028 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4030 /* PSz 16 Sep 03 Keep neat error message */
4031 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4034 /* We absolutely must clear out any saved ids here, so we */
4035 /* exec the real perl, substituting fd script for scriptname. */
4036 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4038 * It might be thought that using setresgid and/or setresuid (changed to
4039 * set the saved IDs) above might obviate the need to exec, and we could
4040 * go on to "do the perl thing".
4042 * Is there such a thing as "saved GID", and is that set for setuid (but
4043 * not setgid) execution like suidperl? Without exec, it would not be
4044 * cleared for setuid (but not setgid) scripts (or might need a dummy
4047 * We need suidperl to do the exact same argument checking that perl
4048 * does. Thus it cannot be very small; while it could be significantly
4049 * smaller, it is safer (simpler?) to make it essentially the same
4050 * binary as perl (but they are not identical). - Maybe could defer that
4051 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4052 * but prefer to do thorough checks in suidperl itself. Such deferral
4053 * would make suidperl security rely on perl, a design no-no.
4055 * Setuid things should be short and simple, thus easy to understand and
4056 * verify. They should do their "own thing", without influence by
4057 * attackers. It may help if their internal execution flow is fixed,
4058 * regardless of platform: it may be best to exec anyway.
4060 * Suidperl should at least be conceptually simple: a wrapper only,
4061 * never to do any real perl. Maybe we should put
4063 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4065 * into the perly bits.
4067 PerlIO_rewind(PL_rsfp);
4068 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4070 * Keep original arguments: suidperl already has fd script.
4072 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4073 /* if (!PL_origargv[which]) { */
4074 /* errno = EPERM; */
4075 /* Perl_croak(aTHX_ "Permission denied\n"); */
4077 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4078 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4079 #if defined(HAS_FCNTL) && defined(F_SETFD)
4080 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4083 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4084 (int)PERL_REVISION, (int)PERL_VERSION,
4085 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4087 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4088 #endif /* IAMSUID */
4090 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4091 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4092 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4093 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4095 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4098 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4099 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4100 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4101 /* not set-id, must be wrapped */
4109 S_find_beginning(pTHX)
4112 register const char *s2;
4113 #ifdef MACOS_TRADITIONAL
4117 /* skip forward in input to the real script? */
4120 #ifdef MACOS_TRADITIONAL
4121 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4123 while (PL_doextract || gMacPerl_AlwaysExtract) {
4124 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4125 if (!gMacPerl_AlwaysExtract)
4126 Perl_croak(aTHX_ "No Perl script found in input\n");
4128 if (PL_doextract) /* require explicit override ? */
4129 if (!OverrideExtract(PL_origfilename))
4130 Perl_croak(aTHX_ "User aborted script\n");
4132 PL_doextract = FALSE;
4134 /* Pater peccavi, file does not have #! */
4135 PerlIO_rewind(PL_rsfp);
4140 while (PL_doextract) {
4141 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4142 Perl_croak(aTHX_ "No Perl script found in input\n");
4145 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4146 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4147 PL_doextract = FALSE;
4148 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4150 while (*s == ' ' || *s == '\t') s++;
4152 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4153 || s2[-1] == '_') s2--;
4154 if (strnEQ(s2-4,"perl",4))
4155 while ((s = moreswitches(s)))
4158 #ifdef MACOS_TRADITIONAL
4159 /* We are always searching for the #!perl line in MacPerl,
4160 * so if we find it, still keep the line count correct
4161 * by counting lines we already skipped over
4163 for (; maclines > 0 ; maclines--)
4164 PerlIO_ungetc(PL_rsfp, '\n');
4168 /* gMacPerl_AlwaysExtract is false in MPW tool */
4169 } else if (gMacPerl_AlwaysExtract) {
4180 PL_uid = PerlProc_getuid();
4181 PL_euid = PerlProc_geteuid();
4182 PL_gid = PerlProc_getgid();
4183 PL_egid = PerlProc_getegid();
4185 PL_uid |= PL_gid << 16;
4186 PL_euid |= PL_egid << 16;
4188 /* Should not happen: */
4189 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4190 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4193 * Should go by suidscript, not uid!=euid: why disallow
4194 * system("ls") in scripts run from setuid things?
4195 * Or, is this run before we check arguments and set suidscript?
4196 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4197 * (We never have suidscript, can we be sure to have fdscript?)
4198 * Or must then go by UID checks? See comments in forbid_setid also.
4202 /* This is used very early in the lifetime of the program,
4203 * before even the options are parsed, so PL_tainting has
4204 * not been initialized properly. */
4206 Perl_doing_taint(int argc, char *argv[], char *envp[])
4208 #ifndef PERL_IMPLICIT_SYS
4209 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4210 * before we have an interpreter-- and the whole point of this
4211 * function is to be called at such an early stage. If you are on
4212 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4213 * "tainted because running with altered effective ids', you'll
4214 * have to add your own checks somewhere in here. The two most
4215 * known samples of 'implicitness' are Win32 and NetWare, neither
4216 * of which has much of concept of 'uids'. */
4217 int uid = PerlProc_getuid();
4218 int euid = PerlProc_geteuid();
4219 int gid = PerlProc_getgid();
4220 int egid = PerlProc_getegid();
4227 if (uid && (euid != uid || egid != gid))
4229 #endif /* !PERL_IMPLICIT_SYS */
4230 /* This is a really primitive check; environment gets ignored only
4231 * if -T are the first chars together; otherwise one gets
4232 * "Too late" message. */
4233 if ( argc > 1 && argv[1][0] == '-'
4234 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4240 S_forbid_setid(pTHX_ const char *s)
4242 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4243 if (PL_euid != PL_uid)
4244 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4245 if (PL_egid != PL_gid)
4246 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4247 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4249 * Checks for UID/GID above "wrong": why disallow
4250 * perl -e 'print "Hello\n"'
4251 * from within setuid things?? Simply drop them: replaced by
4252 * fdscript/suidscript and #ifdef IAMSUID checks below.
4254 * This may be too late for command-line switches. Will catch those on
4255 * the #! line, after finding the script name and setting up
4256 * fdscript/suidscript. Note that suidperl does not get around to
4257 * parsing (and checking) the switches on the #! line, but checks that
4258 * the two sets are identical.
4260 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4261 * instead, or would that be "too late"? (We never have suidscript, can
4262 * we be sure to have fdscript?)
4264 * Catch things with suidscript (in descendant of suidperl), even with
4265 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4266 * below; but I am paranoid.
4268 * Also see comments about root running a setuid script, elsewhere.
4270 if (PL_suidscript >= 0)
4271 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4273 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4274 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4275 #endif /* IAMSUID */
4279 Perl_init_debugger(pTHX)
4281 HV *ostash = PL_curstash;
4283 PL_curstash = PL_debstash;
4284 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4285 AvREAL_off(PL_dbargs);
4286 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4287 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4288 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4289 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4290 sv_setiv(PL_DBsingle, 0);
4291 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4292 sv_setiv(PL_DBtrace, 0);
4293 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4294 sv_setiv(PL_DBsignal, 0);
4295 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4296 sv_setiv(PL_DBassertion, 0);
4297 PL_curstash = ostash;
4300 #ifndef STRESS_REALLOC
4301 #define REASONABLE(size) (size)
4303 #define REASONABLE(size) (1) /* unreasonable */
4307 Perl_init_stacks(pTHX)
4309 /* start with 128-item stack and 8K cxstack */
4310 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4311 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4312 PL_curstackinfo->si_type = PERLSI_MAIN;
4313 PL_curstack = PL_curstackinfo->si_stack;
4314 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4316 PL_stack_base = AvARRAY(PL_curstack);
4317 PL_stack_sp = PL_stack_base;
4318 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4320 New(50,PL_tmps_stack,REASONABLE(128),SV*);
4323 PL_tmps_max = REASONABLE(128);
4325 New(54,PL_markstack,REASONABLE(32),I32);
4326 PL_markstack_ptr = PL_markstack;
4327 PL_markstack_max = PL_markstack + REASONABLE(32);
4331 New(54,PL_scopestack,REASONABLE(32),I32);
4332 PL_scopestack_ix = 0;
4333 PL_scopestack_max = REASONABLE(32);
4335 New(54,PL_savestack,REASONABLE(128),ANY);
4336 PL_savestack_ix = 0;
4337 PL_savestack_max = REASONABLE(128);
4345 while (PL_curstackinfo->si_next)
4346 PL_curstackinfo = PL_curstackinfo->si_next;
4347 while (PL_curstackinfo) {
4348 PERL_SI *p = PL_curstackinfo->si_prev;
4349 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4350 Safefree(PL_curstackinfo->si_cxstack);
4351 Safefree(PL_curstackinfo);
4352 PL_curstackinfo = p;
4354 Safefree(PL_tmps_stack);
4355 Safefree(PL_markstack);
4356 Safefree(PL_scopestack);
4357 Safefree(PL_savestack);
4366 lex_start(PL_linestr);
4368 PL_subname = newSVpvn("main",4);
4372 S_init_predump_symbols(pTHX)
4377 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4378 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4379 GvMULTI_on(PL_stdingv);
4380 io = GvIOp(PL_stdingv);
4381 IoTYPE(io) = IoTYPE_RDONLY;
4382 IoIFP(io) = PerlIO_stdin();
4383 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4385 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4387 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4390 IoTYPE(io) = IoTYPE_WRONLY;
4391 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4393 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4395 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4397 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4398 GvMULTI_on(PL_stderrgv);
4399 io = GvIOp(PL_stderrgv);
4400 IoTYPE(io) = IoTYPE_WRONLY;
4401 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4402 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4404 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4406 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4409 Safefree(PL_osname);
4410 PL_osname = savepv(OSNAME);
4414 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4417 argc--,argv++; /* skip name of script */
4418 if (PL_doswitches) {
4419 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4422 if (argv[0][1] == '-' && !argv[0][2]) {
4426 if ((s = strchr(argv[0], '='))) {
4428 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4431 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4434 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4435 GvMULTI_on(PL_argvgv);
4436 (void)gv_AVadd(PL_argvgv);
4437 av_clear(GvAVn(PL_argvgv));
4438 for (; argc > 0; argc--,argv++) {
4439 SV *sv = newSVpv(argv[0],0);
4440 av_push(GvAVn(PL_argvgv),sv);
4441 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4442 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4445 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4446 (void)sv_utf8_decode(sv);
4452 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4457 PL_toptarget = NEWSV(0,0);
4458 sv_upgrade(PL_toptarget, SVt_PVFM);
4459 sv_setpvn(PL_toptarget, "", 0);
4460 PL_bodytarget = NEWSV(0,0);
4461 sv_upgrade(PL_bodytarget, SVt_PVFM);
4462 sv_setpvn(PL_bodytarget, "", 0);
4463 PL_formtarget = PL_bodytarget;
4467 init_argv_symbols(argc,argv);
4469 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4470 #ifdef MACOS_TRADITIONAL
4471 /* $0 is not majick on a Mac */
4472 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4474 sv_setpv(GvSV(tmpgv),PL_origfilename);
4475 magicname("0", "0", 1);
4478 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4480 GvMULTI_on(PL_envgv);
4481 hv = GvHVn(PL_envgv);
4482 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4484 #ifdef USE_ENVIRON_ARRAY
4485 /* Note that if the supplied env parameter is actually a copy
4486 of the global environ then it may now point to free'd memory
4487 if the environment has been modified since. To avoid this
4488 problem we treat env==NULL as meaning 'use the default'
4493 # ifdef USE_ITHREADS
4494 && PL_curinterp == aTHX
4498 environ[0] = Nullch;
4501 char** origenv = environ;
4504 for (; *env; env++) {
4505 if (!(s = strchr(*env,'=')) || s == *env)
4507 #if defined(MSDOS) && !defined(DJGPP)
4512 sv = newSVpv(s+1, 0);
4513 (void)hv_store(hv, *env, s - *env, sv, 0);
4516 if (origenv != environ) {
4517 /* realloc has shifted us */
4518 env = (env - origenv) + environ;
4523 #endif /* USE_ENVIRON_ARRAY */
4524 #endif /* !PERL_MICRO */
4527 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4528 SvREADONLY_off(GvSV(tmpgv));
4529 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4530 SvREADONLY_on(GvSV(tmpgv));
4532 #ifdef THREADS_HAVE_PIDS
4533 PL_ppid = (IV)getppid();
4536 /* touch @F array to prevent spurious warnings 20020415 MJD */
4538 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4540 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4541 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4542 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4546 S_init_perllib(pTHX)
4551 s = PerlEnv_getenv("PERL5LIB");
4553 incpush(s, TRUE, TRUE, TRUE, FALSE);
4555 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4557 /* Treat PERL5?LIB as a possible search list logical name -- the
4558 * "natural" VMS idiom for a Unix path string. We allow each
4559 * element to be a set of |-separated directories for compatibility.
4563 if (my_trnlnm("PERL5LIB",buf,0))
4564 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4566 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4570 /* Use the ~-expanded versions of APPLLIB (undocumented),
4571 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4574 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4578 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4580 #ifdef MACOS_TRADITIONAL
4583 SV * privdir = NEWSV(55, 0);
4584 char * macperl = PerlEnv_getenv("MACPERL");
4589 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4590 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4591 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4592 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4593 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4594 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4596 SvREFCNT_dec(privdir);
4599 incpush(":", FALSE, FALSE, TRUE, FALSE);
4602 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4605 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4607 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4611 /* sitearch is always relative to sitelib on Windows for
4612 * DLL-based path intuition to work correctly */
4613 # if !defined(WIN32)
4614 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4620 /* this picks up sitearch as well */
4621 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4623 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4627 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4628 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4631 #ifdef PERL_VENDORARCH_EXP
4632 /* vendorarch is always relative to vendorlib on Windows for
4633 * DLL-based path intuition to work correctly */
4634 # if !defined(WIN32)
4635 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4639 #ifdef PERL_VENDORLIB_EXP
4641 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4643 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4647 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4648 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4651 #ifdef PERL_OTHERLIBDIRS
4652 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4656 incpush(".", FALSE, FALSE, TRUE, FALSE);
4657 #endif /* MACOS_TRADITIONAL */
4660 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4661 # define PERLLIB_SEP ';'
4664 # define PERLLIB_SEP '|'
4666 # if defined(MACOS_TRADITIONAL)
4667 # define PERLLIB_SEP ','
4669 # define PERLLIB_SEP ':'
4673 #ifndef PERLLIB_MANGLE
4674 # define PERLLIB_MANGLE(s,n) (s)
4677 /* Push a directory onto @INC if it exists.
4678 Generate a new SV if we do this, to save needing to copy the SV we push
4681 S_incpush_if_exists(pTHX_ SV *dir)
4684 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4685 S_ISDIR(tmpstatbuf.st_mode)) {
4686 av_push(GvAVn(PL_incgv), dir);
4693 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4696 SV *subdir = Nullsv;
4697 const char *p = dir;
4702 if (addsubdirs || addoldvers) {
4703 subdir = NEWSV(0,0);
4706 /* Break at all separators */
4708 SV *libdir = NEWSV(55,0);
4711 /* skip any consecutive separators */
4713 while ( *p == PERLLIB_SEP ) {
4714 /* Uncomment the next line for PATH semantics */
4715 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4720 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4721 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4726 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4727 p = Nullch; /* break out */
4729 #ifdef MACOS_TRADITIONAL
4730 if (!strchr(SvPVX(libdir), ':')) {
4733 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4735 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4736 sv_catpv(libdir, ":");
4739 /* Do the if() outside the #ifdef to avoid warnings about an unused
4742 #ifdef PERL_RELOCATABLE_INC
4744 * Relocatable include entries are marked with a leading .../
4747 * 0: Remove that leading ".../"
4748 * 1: Remove trailing executable name (anything after the last '/')
4749 * from the perl path to give a perl prefix
4751 * While the @INC element starts "../" and the prefix ends with a real
4752 * directory (ie not . or ..) chop that real directory off the prefix
4753 * and the leading "../" from the @INC element. ie a logical "../"
4755 * Finally concatenate the prefix and the remainder of the @INC element
4756 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4757 * generates /usr/local/lib/perl5
4759 char *libpath = SvPVX(libdir);
4760 STRLEN libpath_len = SvCUR(libdir);
4761 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4763 SV *caret_X = get_sv("\030", 0);
4764 /* Going to use the SV just as a scratch buffer holding a C
4770 /* $^X is *the* source of taint if tainting is on, hence
4771 SvPOK() won't be true. */
4773 assert(SvPOKp(caret_X));
4774 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4775 /* Firstly take off the leading .../
4776 If all else fail we'll do the paths relative to the current
4778 sv_chop(libdir, libpath + 4);
4779 /* Don't use SvPV as we're intentionally bypassing taining,
4780 mortal copies that the mg_get of tainting creates, and
4781 corruption that seems to come via the save stack.
4782 I guess that the save stack isn't correctly set up yet. */
4783 libpath = SvPVX(libdir);
4784 libpath_len = SvCUR(libdir);
4786 /* This would work more efficiently with memrchr, but as it's
4787 only a GNU extension we'd need to probe for it and
4788 implement our own. Not hard, but maybe not worth it? */
4790 prefix = SvPVX(prefix_sv);
4791 lastslash = strrchr(prefix, '/');
4793 /* First time in with the *lastslash = '\0' we just wipe off
4794 the trailing /perl from (say) /usr/foo/bin/perl
4798 while ((*lastslash = '\0'), /* Do that, come what may. */
4799 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4800 && (lastslash = strrchr(prefix, '/')))) {
4801 if (lastslash[1] == '\0'
4802 || (lastslash[1] == '.'
4803 && (lastslash[2] == '/' /* ends "/." */
4804 || (lastslash[2] == '/'
4805 && lastslash[3] == '/' /* or "/.." */
4807 /* Prefix ends "/" or "/." or "/..", any of which
4808 are fishy, so don't do any more logical cleanup.
4812 /* Remove leading "../" from path */
4815 /* Next iteration round the loop removes the last
4816 directory name from prefix by writing a '\0' in
4817 the while clause. */
4819 /* prefix has been terminated with a '\0' to the correct
4820 length. libpath points somewhere into the libdir SV.
4821 We need to join the 2 with '/' and drop the result into
4823 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4824 SvREFCNT_dec(libdir);
4825 /* And this is the new libdir. */
4828 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4829 /* Need to taint reloccated paths if running set ID */
4830 SvTAINTED_on(libdir);
4833 SvREFCNT_dec(prefix_sv);
4838 * BEFORE pushing libdir onto @INC we may first push version- and
4839 * archname-specific sub-directories.
4841 if (addsubdirs || addoldvers) {
4842 #ifdef PERL_INC_VERSION_LIST
4843 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4844 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4845 const char **incver;
4851 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4853 while (unix[len-1] == '/') len--; /* Cosmetic */
4854 sv_usepvn(libdir,unix,len);
4857 PerlIO_printf(Perl_error_log,
4858 "Failed to unixify @INC element \"%s\"\n",
4862 #ifdef MACOS_TRADITIONAL
4863 #define PERL_AV_SUFFIX_FMT ""
4864 #define PERL_ARCH_FMT "%s:"
4865 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4867 #define PERL_AV_SUFFIX_FMT "/"
4868 #define PERL_ARCH_FMT "/%s"
4869 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4871 /* .../version/archname if -d .../version/archname */
4872 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4874 (int)PERL_REVISION, (int)PERL_VERSION,
4875 (int)PERL_SUBVERSION, ARCHNAME);
4876 subdir = S_incpush_if_exists(aTHX_ subdir);
4878 /* .../version if -d .../version */
4879 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4880 (int)PERL_REVISION, (int)PERL_VERSION,
4881 (int)PERL_SUBVERSION);
4882 subdir = S_incpush_if_exists(aTHX_ subdir);
4884 /* .../archname if -d .../archname */
4885 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4886 subdir = S_incpush_if_exists(aTHX_ subdir);
4890 #ifdef PERL_INC_VERSION_LIST
4892 for (incver = incverlist; *incver; incver++) {
4893 /* .../xxx if -d .../xxx */
4894 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4895 subdir = S_incpush_if_exists(aTHX_ subdir);
4901 /* finally push this lib directory on the end of @INC */
4902 av_push(GvAVn(PL_incgv), libdir);
4905 assert (SvREFCNT(subdir) == 1);
4906 SvREFCNT_dec(subdir);
4910 #ifdef USE_5005THREADS
4911 STATIC struct perl_thread *
4912 S_init_main_thread(pTHX)
4914 #if !defined(PERL_IMPLICIT_CONTEXT)
4915 struct perl_thread *thr;
4919 Newz(53, thr, 1, struct perl_thread);
4920 PL_curcop = &PL_compiling;
4921 thr->interp = PERL_GET_INTERP;
4922 thr->cvcache = newHV();
4923 thr->threadsv = newAV();
4924 /* thr->threadsvp is set when find_threadsv is called */
4925 thr->specific = newAV();
4926 thr->flags = THRf_R_JOINABLE;
4927 MUTEX_INIT(&thr->mutex);
4928 /* Handcraft thrsv similarly to mess_sv */
4929 New(53, PL_thrsv, 1, SV);
4930 Newz(53, xpv, 1, XPV);
4931 SvFLAGS(PL_thrsv) = SVt_PV;
4932 SvANY(PL_thrsv) = (void*)xpv;
4933 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4934 SvPV_set(PL_thrsvr, (char*)thr);
4935 SvCUR_set(PL_thrsv, sizeof(thr));
4936 SvLEN_set(PL_thrsv, sizeof(thr));
4937 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4938 thr->oursv = PL_thrsv;
4939 PL_chopset = " \n-";
4942 MUTEX_LOCK(&PL_threads_mutex);
4948 MUTEX_UNLOCK(&PL_threads_mutex);
4950 #ifdef HAVE_THREAD_INTERN
4951 Perl_init_thread_intern(thr);
4954 #ifdef SET_THREAD_SELF
4955 SET_THREAD_SELF(thr);
4957 thr->self = pthread_self();
4958 #endif /* SET_THREAD_SELF */
4962 * These must come after the thread self setting
4963 * because sv_setpvn does SvTAINT and the taint
4964 * fields thread selfness being set.
4966 PL_toptarget = NEWSV(0,0);
4967 sv_upgrade(PL_toptarget, SVt_PVFM);
4968 sv_setpvn(PL_toptarget, "", 0);
4969 PL_bodytarget = NEWSV(0,0);
4970 sv_upgrade(PL_bodytarget, SVt_PVFM);
4971 sv_setpvn(PL_bodytarget, "", 0);
4972 PL_formtarget = PL_bodytarget;
4973 thr->errsv = newSVpvn("", 0);
4974 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
4977 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
4978 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
4979 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
4980 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
4981 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
4982 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
4984 PL_reginterp_cnt = 0;
4988 #endif /* USE_5005THREADS */
4991 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4995 const line_t oldline = CopLINE(PL_curcop);
5001 while (av_len(paramList) >= 0) {
5002 cv = (CV*)av_shift(paramList);
5004 if (paramList == PL_beginav) {
5005 /* save PL_beginav for compiler */
5006 if (! PL_beginav_save)
5007 PL_beginav_save = newAV();
5008 av_push(PL_beginav_save, (SV*)cv);
5010 else if (paramList == PL_checkav) {
5011 /* save PL_checkav for compiler */
5012 if (! PL_checkav_save)
5013 PL_checkav_save = newAV();
5014 av_push(PL_checkav_save, (SV*)cv);
5024 (void)SvPV_const(atsv, len);
5026 PL_curcop = &PL_compiling;
5027 CopLINE_set(PL_curcop, oldline);
5028 if (paramList == PL_beginav)
5029 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5031 Perl_sv_catpvf(aTHX_ atsv,
5032 "%s failed--call queue aborted",
5033 paramList == PL_checkav ? "CHECK"
5034 : paramList == PL_initav ? "INIT"
5036 while (PL_scopestack_ix > oldscope)
5039 Perl_croak(aTHX_ "%"SVf"", atsv);
5046 /* my_exit() was called */
5047 while (PL_scopestack_ix > oldscope)
5050 PL_curstash = PL_defstash;
5051 PL_curcop = &PL_compiling;
5052 CopLINE_set(PL_curcop, oldline);
5054 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5055 if (paramList == PL_beginav)
5056 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5058 Perl_croak(aTHX_ "%s failed--call queue aborted",
5059 paramList == PL_checkav ? "CHECK"
5060 : paramList == PL_initav ? "INIT"
5067 PL_curcop = &PL_compiling;
5068 CopLINE_set(PL_curcop, oldline);
5071 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5080 S_call_list_body(pTHX_ CV *cv)
5082 PUSHMARK(PL_stack_sp);
5083 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5088 Perl_my_exit(pTHX_ U32 status)
5090 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5091 thr, (unsigned long) status));
5100 STATUS_NATIVE_SET(status);
5107 Perl_my_failure_exit(pTHX)
5110 if (vaxc$errno & 1) {
5111 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5112 STATUS_NATIVE_SET(44);
5115 if (!vaxc$errno) /* unlikely */
5116 STATUS_NATIVE_SET(44);
5118 STATUS_NATIVE_SET(vaxc$errno);
5123 STATUS_UNIX_SET(errno);
5125 exitstatus = STATUS_UNIX >> 8;
5126 if (exitstatus & 255)
5127 STATUS_UNIX_SET(exitstatus);
5129 STATUS_UNIX_SET(255);
5136 S_my_exit_jump(pTHX)
5139 register PERL_CONTEXT *cx;
5144 SvREFCNT_dec(PL_e_script);
5145 PL_e_script = Nullsv;
5148 POPSTACK_TO(PL_mainstack);
5149 if (cxstack_ix >= 0) {
5152 POPBLOCK(cx,PL_curpm);
5157 PERL_UNUSED_VAR(gimme);
5158 PERL_UNUSED_VAR(newsp);
5162 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5164 const char * const p = SvPVX_const(PL_e_script);
5165 const char *nl = strchr(p, '\n');
5167 PERL_UNUSED_ARG(idx);
5168 PERL_UNUSED_ARG(maxlen);
5170 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5172 filter_del(read_e_script);
5175 sv_catpvn(buf_sv, p, nl-p);
5176 sv_chop(PL_e_script, nl);
5182 * c-indentation-style: bsd
5184 * indent-tabs-mode: t
5187 * ex: set ts=8 sts=4 sw=4 noet: