3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
141 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
155 PERL_SET_THX(my_perl);
159 #ifdef PERL_IMPLICIT_SYS
161 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
162 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
163 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
164 struct IPerlDir* ipD, struct IPerlSock* ipS,
165 struct IPerlProc* ipP)
167 PerlInterpreter *my_perl;
168 /* Newx() needs interpreter, so call malloc() instead */
169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
170 S_init_tls_and_interp(my_perl);
171 Zero(my_perl, 1, PerlInterpreter);
187 =head1 Embedding Functions
189 =for apidoc perl_alloc
191 Allocates a new Perl interpreter. See L<perlembed>.
199 PerlInterpreter *my_perl;
201 /* Newx() needs interpreter, so call malloc() instead */
202 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
204 S_init_tls_and_interp(my_perl);
205 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
207 #endif /* PERL_IMPLICIT_SYS */
210 =for apidoc perl_construct
212 Initializes a new Perl interpreter. See L<perlembed>.
218 perl_construct(pTHXx)
221 PERL_UNUSED_ARG(my_perl);
224 PL_perl_destruct_level = 1;
226 if (PL_perl_destruct_level > 0)
229 /* Init the real globals (and main thread)? */
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
233 PL_linestr = NEWSV(65,79);
234 sv_upgrade(PL_linestr,SVt_PVIV);
236 if (!SvREADONLY(&PL_sv_undef)) {
237 /* set read-only and try to insure than we wont see REFCNT==0
240 SvREADONLY_on(&PL_sv_undef);
241 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
243 sv_setpv(&PL_sv_no,PL_No);
244 /* value lookup in void context - happens to have the side effect
245 of caching the numeric forms. */
248 SvREADONLY_on(&PL_sv_no);
249 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_yes,PL_Yes);
254 SvREADONLY_on(&PL_sv_yes);
255 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
257 SvREADONLY_on(&PL_sv_placeholder);
258 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
261 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
262 PL_pidstatus = newHV();
265 PL_rs = newSVpvn("\n", 1);
270 PL_lex_state = LEX_NOTPARSING;
276 SET_NUMERIC_STANDARD();
278 #if defined(LOCAL_PATCH_COUNT)
279 PL_localpatches = local_patches; /* For possible -v */
282 #ifdef HAVE_INTERP_INTERN
286 PerlIO_init(aTHX); /* Hook to IO system */
288 PL_fdpid = newAV(); /* for remembering popen pids by fd */
289 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
290 PL_errors = newSVpvn("",0);
291 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
292 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
293 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
295 PL_regex_padav = newAV();
296 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
297 PL_regex_pad = AvARRAY(PL_regex_padav);
299 #ifdef USE_REENTRANT_API
300 Perl_reentrant_init(aTHX);
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
311 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
317 # ifdef USE_ENVIRON_ARRAY
318 PL_origenviron = environ;
322 /* Use sysconf(_SC_CLK_TCK) if available, if not
323 * available or if the sysconf() fails, use the HZ.
324 * BeOS has those, but returns the wrong value.
325 * The HZ if not originally defined has been by now
326 * been defined as CLK_TCK, if available. */
327 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
328 PL_clocktick = sysconf(_SC_CLK_TCK);
329 if (PL_clocktick <= 0)
333 PL_stashcache = newHV();
335 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
336 (int)PERL_VERSION, (int)PERL_SUBVERSION);
339 if (!PL_mmap_page_size) {
340 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
342 SETERRNO(0, SS_NORMAL);
344 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
346 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
348 if ((long) PL_mmap_page_size < 0) {
351 (void) SvUPGRADE(error, SVt_PV);
352 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
355 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
359 # ifdef HAS_GETPAGESIZE
360 PL_mmap_page_size = getpagesize();
362 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
363 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
367 if (PL_mmap_page_size <= 0)
368 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
369 (IV) PL_mmap_page_size);
371 #endif /* HAS_MMAP */
373 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
374 PL_timesbase.tms_utime = 0;
375 PL_timesbase.tms_stime = 0;
376 PL_timesbase.tms_cutime = 0;
377 PL_timesbase.tms_cstime = 0;
384 =for apidoc nothreadhook
386 Stub that provides thread hook for perl_destruct when there are
393 Perl_nothreadhook(pTHX)
398 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
400 Perl_dump_sv_child(pTHX_ SV *sv)
403 const int sock = PL_dumper_fd;
404 const int debug_fd = PerlIO_fileno(Perl_debug_log);
405 union control_un control;
408 struct cmsghdr *cmptr;
410 unsigned char buffer[256];
412 if(sock == -1 || debug_fd == -1)
415 PerlIO_flush(Perl_debug_log);
417 /* All these shenanigans are to pass a file descriptor over to our child for
418 it to dump out to. We can't let it hold open the file descriptor when it
419 forks, as the file descriptor it will dump to can turn out to be one end
420 of pipe that some other process will wait on for EOF. (So as it would
421 be open, the wait would be forever. */
423 msg.msg_control = control.control;
424 msg.msg_controllen = sizeof(control.control);
425 /* We're a connected socket so we don't need a destination */
431 cmptr = CMSG_FIRSTHDR(&msg);
432 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
433 cmptr->cmsg_level = SOL_SOCKET;
434 cmptr->cmsg_type = SCM_RIGHTS;
435 *((int *)CMSG_DATA(cmptr)) = 1;
437 vec[0].iov_base = (void*)&sv;
438 vec[0].iov_len = sizeof(sv);
439 got = sendmsg(sock, &msg, 0);
442 perror("Debug leaking scalars parent sendmsg failed");
445 if(got < sizeof(sv)) {
446 perror("Debug leaking scalars parent short sendmsg");
450 /* Return protocol is
452 unsigned char: length of location string (0 for empty)
453 unsigned char*: string (not terminated)
455 vec[0].iov_base = (void*)&returned_errno;
456 vec[0].iov_len = sizeof(returned_errno);
457 vec[1].iov_base = buffer;
460 got = readv(sock, vec, 2);
463 perror("Debug leaking scalars parent read failed");
464 PerlIO_flush(PerlIO_stderr());
467 if(got < sizeof(returned_errno) + 1) {
468 perror("Debug leaking scalars parent short read");
469 PerlIO_flush(PerlIO_stderr());
474 got = read(sock, buffer + 1, *buffer);
476 perror("Debug leaking scalars parent read 2 failed");
477 PerlIO_flush(PerlIO_stderr());
482 perror("Debug leaking scalars parent short read 2");
483 PerlIO_flush(PerlIO_stderr());
488 if (returned_errno || *buffer) {
489 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
490 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
491 returned_errno, strerror(returned_errno));
497 =for apidoc perl_destruct
499 Shuts down a Perl interpreter. See L<perlembed>.
508 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
510 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
514 PERL_UNUSED_ARG(my_perl);
516 /* wait for all pseudo-forked children to finish */
517 PERL_WAIT_FOR_CHILDREN;
519 destruct_level = PL_perl_destruct_level;
522 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
524 const int i = atoi(s);
525 if (destruct_level < i)
531 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
537 if (PL_endav && !PL_minus_c)
538 call_list(PL_scopestack_ix, PL_endav);
544 /* Need to flush since END blocks can produce output */
547 if (CALL_FPTR(PL_threadhook)(aTHX)) {
548 /* Threads hook has vetoed further cleanup */
549 return STATUS_NATIVE_EXPORT;
552 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
553 if (destruct_level != 0) {
554 /* Fork here to create a child. Our child's job is to preserve the
555 state of scalars prior to destruction, so that we can instruct it
556 to dump any scalars that we later find have leaked.
557 There's no subtlety in this code - it assumes POSIX, and it doesn't
561 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
562 perror("Debug leaking scalars socketpair failed");
568 perror("Debug leaking scalars fork failed");
572 /* We are the child */
573 const int sock = fd[1];
574 const int debug_fd = PerlIO_fileno(Perl_debug_log);
577 /* Our success message is an integer 0, and a char 0 */
578 static const char success[sizeof(int) + 1];
582 /* We need to close all other file descriptors otherwise we end up
583 with interesting hangs, where the parent closes its end of a
584 pipe, and sits waiting for (another) child to terminate. Only
585 that child never terminates, because it never gets EOF, because
586 we also have the far end of the pipe open. We even need to
587 close the debugging fd, because sometimes it happens to be one
588 end of a pipe, and a process is waiting on the other end for
589 EOF. Normally it would be closed at some point earlier in
590 destruction, but if we happen to cause the pipe to remain open,
591 EOF never occurs, and we get an infinite hang. Hence all the
592 games to pass in a file descriptor if it's actually needed. */
594 f = sysconf(_SC_OPEN_MAX);
596 where = "sysconf failed";
607 union control_un control;
610 struct cmsghdr *cmptr;
614 msg.msg_control = control.control;
615 msg.msg_controllen = sizeof(control.control);
616 /* We're a connected socket so we don't need a source */
620 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
622 vec[0].iov_base = (void*)⌖
623 vec[0].iov_len = sizeof(target);
625 got = recvmsg(sock, &msg, 0);
630 where = "recv failed";
633 if(got < sizeof(target)) {
634 where = "short recv";
638 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
642 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
643 where = "wrong cmsg_len";
646 if(cmptr->cmsg_level != SOL_SOCKET) {
647 where = "wrong cmsg_level";
650 if(cmptr->cmsg_type != SCM_RIGHTS) {
651 where = "wrong cmsg_type";
655 got_fd = *(int*)CMSG_DATA(cmptr);
656 /* For our last little bit of trickery, put the file descriptor
657 back into Perl_debug_log, as if we never actually closed it
659 if(got_fd != debug_fd) {
660 if (dup2(got_fd, debug_fd) == -1) {
667 PerlIO_flush(Perl_debug_log);
669 got = write(sock, &success, sizeof(success));
672 where = "write failed";
675 if(got < sizeof(success)) {
676 where = "short write";
683 int send_errno = errno;
684 unsigned char length = (unsigned char) strlen(where);
685 struct iovec failure[3] = {
686 {(void*)&send_errno, sizeof(send_errno)},
688 {(void*)where, length}
690 int got = writev(sock, failure, 3);
691 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
692 in the parent if we try to read from the socketpair after the
693 child has exited, even if there was data to read.
694 So sleep a bit to give the parent a fighting chance of
697 _exit((got == -1) ? errno : 0);
701 PL_dumper_fd = fd[0];
706 /* We must account for everything. */
708 /* Destroy the main CV and syntax tree */
709 /* Do this now, because destroying ops can cause new SVs to be generated
710 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
711 PL_curcop to point to a valid op from which the filename structure
713 PL_curcop = &PL_compiling;
715 /* ensure comppad/curpad to refer to main's pad */
716 if (CvPADLIST(PL_main_cv)) {
717 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
719 op_free(PL_main_root);
720 PL_main_root = Nullop;
722 PL_main_start = Nullop;
723 SvREFCNT_dec(PL_main_cv);
727 /* Tell PerlIO we are about to tear things apart in case
728 we have layers which are using resources that should
732 PerlIO_destruct(aTHX);
734 if (PL_sv_objcount) {
736 * Try to destruct global references. We do this first so that the
737 * destructors and destructees still exist. Some sv's might remain.
738 * Non-referenced objects are on their own.
744 /* unhook hooks which will soon be, or use, destroyed data */
745 SvREFCNT_dec(PL_warnhook);
746 PL_warnhook = Nullsv;
747 SvREFCNT_dec(PL_diehook);
750 /* call exit list functions */
751 while (PL_exitlistlen-- > 0)
752 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
754 Safefree(PL_exitlist);
759 if (destruct_level == 0){
761 DEBUG_P(debprofdump());
763 #if defined(PERLIO_LAYERS)
764 /* No more IO - including error messages ! */
765 PerlIO_cleanup(aTHX);
768 /* The exit() function will do everything that needs doing. */
769 return STATUS_NATIVE_EXPORT;
772 /* jettison our possibly duplicated environment */
773 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
774 * so we certainly shouldn't free it here
777 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
778 if (environ != PL_origenviron && !PL_use_safe_putenv
780 /* only main thread can free environ[0] contents */
781 && PL_curinterp == aTHX
787 for (i = 0; environ[i]; i++)
788 safesysfree(environ[i]);
790 /* Must use safesysfree() when working with environ. */
791 safesysfree(environ);
793 environ = PL_origenviron;
796 #endif /* !PERL_MICRO */
798 /* reset so print() ends up where we expect */
802 /* the syntax tree is shared between clones
803 * so op_free(PL_main_root) only ReREFCNT_dec's
804 * REGEXPs in the parent interpreter
805 * we need to manually ReREFCNT_dec for the clones
808 I32 i = AvFILLp(PL_regex_padav) + 1;
809 SV **ary = AvARRAY(PL_regex_padav);
814 if (SvFLAGS(resv) & SVf_BREAK) {
815 /* this is PL_reg_curpm, already freed
816 * flag is set in regexec.c:S_regtry
818 SvFLAGS(resv) &= ~SVf_BREAK;
820 else if(SvREPADTMP(resv)) {
821 SvREPADTMP_off(resv);
823 else if(SvIOKp(resv)) {
824 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
829 SvREFCNT_dec(PL_regex_padav);
830 PL_regex_padav = Nullav;
834 SvREFCNT_dec((SV*) PL_stashcache);
835 PL_stashcache = NULL;
837 /* loosen bonds of global variables */
840 (void)PerlIO_close(PL_rsfp);
844 /* Filters for program text */
845 SvREFCNT_dec(PL_rsfp_filters);
846 PL_rsfp_filters = Nullav;
849 PL_preprocess = FALSE;
855 PL_doswitches = FALSE;
856 PL_dowarn = G_WARN_OFF;
857 PL_doextract = FALSE;
858 PL_sawampersand = FALSE; /* must save all match strings */
861 Safefree(PL_inplace);
863 SvREFCNT_dec(PL_patchlevel);
866 SvREFCNT_dec(PL_e_script);
867 PL_e_script = Nullsv;
872 /* magical thingies */
874 SvREFCNT_dec(PL_ofs_sv); /* $, */
877 SvREFCNT_dec(PL_ors_sv); /* $\ */
880 SvREFCNT_dec(PL_rs); /* $/ */
883 PL_multiline = 0; /* $* */
884 Safefree(PL_osname); /* $^O */
887 SvREFCNT_dec(PL_statname);
888 PL_statname = Nullsv;
891 /* defgv, aka *_ should be taken care of elsewhere */
893 /* clean up after study() */
894 SvREFCNT_dec(PL_lastscream);
895 PL_lastscream = Nullsv;
896 Safefree(PL_screamfirst);
898 Safefree(PL_screamnext);
902 Safefree(PL_efloatbuf);
903 PL_efloatbuf = Nullch;
906 /* startup and shutdown function lists */
907 SvREFCNT_dec(PL_beginav);
908 SvREFCNT_dec(PL_beginav_save);
909 SvREFCNT_dec(PL_endav);
910 SvREFCNT_dec(PL_checkav);
911 SvREFCNT_dec(PL_checkav_save);
912 SvREFCNT_dec(PL_initav);
914 PL_beginav_save = Nullav;
917 PL_checkav_save = Nullav;
920 /* shortcuts just get cleared */
926 PL_argvoutgv = Nullgv;
928 PL_stderrgv = Nullgv;
929 PL_last_in_gv = Nullgv;
934 PL_DBsingle = Nullsv;
936 PL_DBsignal = Nullsv;
937 PL_DBassertion = Nullsv;
940 PL_debstash = Nullhv;
942 SvREFCNT_dec(PL_argvout_stack);
943 PL_argvout_stack = Nullav;
945 SvREFCNT_dec(PL_modglobal);
946 PL_modglobal = Nullhv;
947 SvREFCNT_dec(PL_preambleav);
948 PL_preambleav = Nullav;
949 SvREFCNT_dec(PL_subname);
951 SvREFCNT_dec(PL_linestr);
953 SvREFCNT_dec(PL_pidstatus);
954 PL_pidstatus = Nullhv;
955 SvREFCNT_dec(PL_toptarget);
956 PL_toptarget = Nullsv;
957 SvREFCNT_dec(PL_bodytarget);
958 PL_bodytarget = Nullsv;
959 PL_formtarget = Nullsv;
961 /* free locale stuff */
962 #ifdef USE_LOCALE_COLLATE
963 Safefree(PL_collation_name);
964 PL_collation_name = Nullch;
967 #ifdef USE_LOCALE_NUMERIC
968 Safefree(PL_numeric_name);
969 PL_numeric_name = Nullch;
970 SvREFCNT_dec(PL_numeric_radix_sv);
971 PL_numeric_radix_sv = Nullsv;
974 /* clear utf8 character classes */
975 SvREFCNT_dec(PL_utf8_alnum);
976 SvREFCNT_dec(PL_utf8_alnumc);
977 SvREFCNT_dec(PL_utf8_ascii);
978 SvREFCNT_dec(PL_utf8_alpha);
979 SvREFCNT_dec(PL_utf8_space);
980 SvREFCNT_dec(PL_utf8_cntrl);
981 SvREFCNT_dec(PL_utf8_graph);
982 SvREFCNT_dec(PL_utf8_digit);
983 SvREFCNT_dec(PL_utf8_upper);
984 SvREFCNT_dec(PL_utf8_lower);
985 SvREFCNT_dec(PL_utf8_print);
986 SvREFCNT_dec(PL_utf8_punct);
987 SvREFCNT_dec(PL_utf8_xdigit);
988 SvREFCNT_dec(PL_utf8_mark);
989 SvREFCNT_dec(PL_utf8_toupper);
990 SvREFCNT_dec(PL_utf8_totitle);
991 SvREFCNT_dec(PL_utf8_tolower);
992 SvREFCNT_dec(PL_utf8_tofold);
993 SvREFCNT_dec(PL_utf8_idstart);
994 SvREFCNT_dec(PL_utf8_idcont);
995 PL_utf8_alnum = Nullsv;
996 PL_utf8_alnumc = Nullsv;
997 PL_utf8_ascii = Nullsv;
998 PL_utf8_alpha = Nullsv;
999 PL_utf8_space = Nullsv;
1000 PL_utf8_cntrl = Nullsv;
1001 PL_utf8_graph = Nullsv;
1002 PL_utf8_digit = Nullsv;
1003 PL_utf8_upper = Nullsv;
1004 PL_utf8_lower = Nullsv;
1005 PL_utf8_print = Nullsv;
1006 PL_utf8_punct = Nullsv;
1007 PL_utf8_xdigit = Nullsv;
1008 PL_utf8_mark = Nullsv;
1009 PL_utf8_toupper = Nullsv;
1010 PL_utf8_totitle = Nullsv;
1011 PL_utf8_tolower = Nullsv;
1012 PL_utf8_tofold = Nullsv;
1013 PL_utf8_idstart = Nullsv;
1014 PL_utf8_idcont = Nullsv;
1016 if (!specialWARN(PL_compiling.cop_warnings))
1017 SvREFCNT_dec(PL_compiling.cop_warnings);
1018 PL_compiling.cop_warnings = Nullsv;
1019 if (!specialCopIO(PL_compiling.cop_io))
1020 SvREFCNT_dec(PL_compiling.cop_io);
1021 PL_compiling.cop_io = Nullsv;
1022 CopFILE_free(&PL_compiling);
1023 CopSTASH_free(&PL_compiling);
1025 /* Prepare to destruct main symbol table. */
1030 SvREFCNT_dec(PL_curstname);
1031 PL_curstname = Nullsv;
1033 /* clear queued errors */
1034 SvREFCNT_dec(PL_errors);
1038 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1039 if (PL_scopestack_ix != 0)
1040 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1041 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1042 (long)PL_scopestack_ix);
1043 if (PL_savestack_ix != 0)
1044 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1045 "Unbalanced saves: %ld more saves than restores\n",
1046 (long)PL_savestack_ix);
1047 if (PL_tmps_floor != -1)
1048 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1049 (long)PL_tmps_floor + 1);
1050 if (cxstack_ix != -1)
1051 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1052 (long)cxstack_ix + 1);
1055 /* Now absolutely destruct everything, somehow or other, loops or no. */
1056 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1057 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1059 /* the 2 is for PL_fdpid and PL_strtab */
1060 while (PL_sv_count > 2 && sv_clean_all())
1063 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1064 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1065 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1066 SvFLAGS(PL_strtab) |= SVt_PVHV;
1068 AvREAL_off(PL_fdpid); /* no surviving entries */
1069 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1072 #ifdef HAVE_INTERP_INTERN
1076 /* Destruct the global string table. */
1078 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1079 * so that sv_free() won't fail on them.
1080 * Now that the global string table is using a single hunk of memory
1081 * for both HE and HEK, we either need to explicitly unshare it the
1082 * correct way, or actually free things here.
1085 const I32 max = HvMAX(PL_strtab);
1086 HE **array = HvARRAY(PL_strtab);
1087 HE *hent = array[0];
1090 if (hent && ckWARN_d(WARN_INTERNAL)) {
1091 HE *next = HeNEXT(hent);
1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1093 "Unbalanced string table refcount: (%d) for \"%s\"",
1094 HeVAL(hent) - Nullsv, HeKEY(hent));
1101 hent = array[riter];
1106 HvARRAY(PL_strtab) = 0;
1107 HvTOTALKEYS(PL_strtab) = 0;
1108 HvFILL(PL_strtab) = 0;
1110 SvREFCNT_dec(PL_strtab);
1113 /* free the pointer tables used for cloning */
1114 ptr_table_free(PL_ptr_table);
1115 PL_ptr_table = (PTR_TBL_t*)NULL;
1118 /* free special SVs */
1120 SvREFCNT(&PL_sv_yes) = 0;
1121 sv_clear(&PL_sv_yes);
1122 SvANY(&PL_sv_yes) = NULL;
1123 SvFLAGS(&PL_sv_yes) = 0;
1125 SvREFCNT(&PL_sv_no) = 0;
1126 sv_clear(&PL_sv_no);
1127 SvANY(&PL_sv_no) = NULL;
1128 SvFLAGS(&PL_sv_no) = 0;
1132 for (i=0; i<=2; i++) {
1133 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1134 sv_clear(PERL_DEBUG_PAD(i));
1135 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1136 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1140 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1141 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1143 #ifdef DEBUG_LEAKING_SCALARS
1144 if (PL_sv_count != 0) {
1149 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1150 svend = &sva[SvREFCNT(sva)];
1151 for (sv = sva + 1; sv < svend; ++sv) {
1152 if (SvTYPE(sv) != SVTYPEMASK) {
1153 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1155 " refcnt=%"UVuf pTHX__FORMAT "\n"
1156 "\tallocated at %s:%d %s %s%s\n",
1157 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1158 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1160 sv->sv_debug_inpad ? "for" : "by",
1161 sv->sv_debug_optype ?
1162 PL_op_name[sv->sv_debug_optype]: "(none)",
1163 sv->sv_debug_cloned ? " (cloned)" : ""
1165 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1166 Perl_dump_sv_child(aTHX_ sv);
1172 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 /* Wait for up to 4 seconds for child to terminate.
1177 This seems to be the least effort way of timing out on reaping
1179 struct timeval waitfor = {4, 0};
1180 int sock = PL_dumper_fd;
1184 FD_SET(sock, &rset);
1185 select(sock + 1, &rset, NULL, NULL, &waitfor);
1186 waitpid(child, &status, WNOHANG);
1194 #if defined(PERLIO_LAYERS)
1195 /* No more IO - including error messages ! */
1196 PerlIO_cleanup(aTHX);
1199 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1200 as currently layers use it rather than Nullsv as a marker
1201 for no arg - and will try and SvREFCNT_dec it.
1203 SvREFCNT(&PL_sv_undef) = 0;
1204 SvREADONLY_off(&PL_sv_undef);
1206 Safefree(PL_origfilename);
1207 PL_origfilename = Nullch;
1208 Safefree(PL_reg_start_tmp);
1209 PL_reg_start_tmp = (char**)NULL;
1210 PL_reg_start_tmpl = 0;
1211 Safefree(PL_reg_curpm);
1212 Safefree(PL_reg_poscache);
1213 free_tied_hv_pool();
1214 Safefree(PL_op_mask);
1215 Safefree(PL_psig_ptr);
1216 PL_psig_ptr = (SV**)NULL;
1217 Safefree(PL_psig_name);
1218 PL_psig_name = (SV**)NULL;
1219 Safefree(PL_bitcount);
1220 PL_bitcount = Nullch;
1221 Safefree(PL_psig_pend);
1222 PL_psig_pend = (int*)NULL;
1223 PL_formfeed = Nullsv;
1225 PL_tainting = FALSE;
1226 PL_taint_warn = FALSE;
1227 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1230 DEBUG_P(debprofdump());
1232 #ifdef USE_REENTRANT_API
1233 Perl_reentrant_free(aTHX);
1238 /* As the absolutely last thing, free the non-arena SV for mess() */
1241 /* we know that type == SVt_PVMG */
1243 /* it could have accumulated taint magic */
1246 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1247 moremagic = mg->mg_moremagic;
1248 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1250 Safefree(mg->mg_ptr);
1254 /* we know that type >= SVt_PV */
1255 SvPV_free(PL_mess_sv);
1256 Safefree(SvANY(PL_mess_sv));
1257 Safefree(PL_mess_sv);
1258 PL_mess_sv = Nullsv;
1260 return STATUS_NATIVE_EXPORT;
1264 =for apidoc perl_free
1266 Releases a Perl interpreter. See L<perlembed>.
1274 #if defined(WIN32) || defined(NETWARE)
1275 # if defined(PERL_IMPLICIT_SYS)
1277 void *host = nw_internal_host;
1279 void *host = w32_internal_host;
1281 PerlMem_free(aTHXx);
1283 nw_delete_internal_host(host);
1285 win32_delete_internal_host(host);
1288 PerlMem_free(aTHXx);
1291 PerlMem_free(aTHXx);
1295 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1296 /* provide destructors to clean up the thread key when libperl is unloaded */
1297 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1299 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1300 #pragma fini "perl_fini"
1304 #if defined(__GNUC__)
1305 __attribute__((destructor))
1315 #endif /* THREADS */
1318 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1320 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1321 PL_exitlist[PL_exitlistlen].fn = fn;
1322 PL_exitlist[PL_exitlistlen].ptr = ptr;
1326 #ifdef HAS_PROCSELFEXE
1327 /* This is a function so that we don't hold on to MAXPATHLEN
1328 bytes of stack longer than necessary
1331 S_procself_val(pTHX_ SV *sv, const char *arg0)
1333 char buf[MAXPATHLEN];
1334 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1336 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1337 includes a spurious NUL which will cause $^X to fail in system
1338 or backticks (this will prevent extensions from being built and
1339 many tests from working). readlink is not meant to add a NUL.
1340 Normal readlink works fine.
1342 if (len > 0 && buf[len-1] == '\0') {
1346 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1347 returning the text "unknown" from the readlink rather than the path
1348 to the executable (or returning an error from the readlink). Any valid
1349 path has a '/' in it somewhere, so use that to validate the result.
1350 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1352 if (len > 0 && memchr(buf, '/', len)) {
1353 sv_setpvn(sv,buf,len);
1359 #endif /* HAS_PROCSELFEXE */
1362 S_set_caret_X(pTHX) {
1363 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1365 #ifdef HAS_PROCSELFEXE
1366 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1369 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1371 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1378 =for apidoc perl_parse
1380 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1386 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1393 PERL_UNUSED_VAR(my_perl);
1395 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1398 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1399 setuid perl scripts securely.\n");
1400 #endif /* IAMSUID */
1403 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1404 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1405 * This MUST be done before any hash stores or fetches take place.
1406 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1407 * yourself, it is your responsibility to provide a good random seed!
1408 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1409 if (!PL_rehash_seed_set)
1410 PL_rehash_seed = get_hash_seed();
1412 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1414 if (s && (atoi(s) == 1))
1415 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1417 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1423 /* Set PL_origalen be the sum of the contiguous argv[]
1424 * elements plus the size of the env in case that it is
1425 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1426 * as the maximum modifiable length of $0. In the worst case
1427 * the area we are able to modify is limited to the size of
1428 * the original argv[0]. (See below for 'contiguous', though.)
1430 const char *s = NULL;
1433 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1434 /* Do the mask check only if the args seem like aligned. */
1436 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1438 /* See if all the arguments are contiguous in memory. Note
1439 * that 'contiguous' is a loose term because some platforms
1440 * align the argv[] and the envp[]. If the arguments look
1441 * like non-aligned, assume that they are 'strictly' or
1442 * 'traditionally' contiguous. If the arguments look like
1443 * aligned, we just check that they are within aligned
1444 * PTRSIZE bytes. As long as no system has something bizarre
1445 * like the argv[] interleaved with some other data, we are
1446 * fine. (Did I just evoke Murphy's Law?) --jhi */
1447 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1449 for (i = 1; i < PL_origargc; i++) {
1450 if ((PL_origargv[i] == s + 1
1452 || PL_origargv[i] == s + 2
1457 (PL_origargv[i] > s &&
1459 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1469 /* Can we grab env area too to be used as the area for $0? */
1470 if (PL_origenviron) {
1471 if ((PL_origenviron[0] == s + 1
1473 || (PL_origenviron[0] == s + 9 && (s += 8))
1478 (PL_origenviron[0] > s &&
1479 PL_origenviron[0] <=
1480 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1484 s = PL_origenviron[0];
1487 my_setenv("NoNe SuCh", Nullch);
1488 /* Force copy of environment. */
1489 for (i = 1; PL_origenviron[i]; i++) {
1490 if (PL_origenviron[i] == s + 1
1493 (PL_origenviron[i] > s &&
1494 PL_origenviron[i] <=
1495 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1498 s = PL_origenviron[i];
1506 PL_origalen = s - PL_origargv[0] + 1;
1511 /* Come here if running an undumped a.out. */
1513 PL_origfilename = savepv(argv[0]);
1514 PL_do_undump = FALSE;
1515 cxstack_ix = -1; /* start label stack again */
1517 assert (!PL_tainted);
1519 S_set_caret_X(aTHX);
1521 init_postdump_symbols(argc,argv,env);
1526 op_free(PL_main_root);
1527 PL_main_root = Nullop;
1529 PL_main_start = Nullop;
1530 SvREFCNT_dec(PL_main_cv);
1531 PL_main_cv = Nullcv;
1534 oldscope = PL_scopestack_ix;
1535 PL_dowarn = G_WARN_OFF;
1540 parse_body(env,xsinit);
1542 call_list(oldscope, PL_checkav);
1549 /* my_exit() was called */
1550 while (PL_scopestack_ix > oldscope)
1553 PL_curstash = PL_defstash;
1555 call_list(oldscope, PL_checkav);
1556 ret = STATUS_NATIVE_EXPORT;
1559 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1568 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1571 int argc = PL_origargc;
1572 char **argv = PL_origargv;
1573 const char *scriptname = NULL;
1574 VOL bool dosearch = FALSE;
1575 const char *validarg = "";
1578 const char *cddir = Nullch;
1579 #ifdef USE_SITECUSTOMIZE
1580 bool minus_f = FALSE;
1585 sv_setpvn(PL_linestr,"",0);
1586 sv = newSVpvn("",0); /* first used for -I flags */
1590 for (argc--,argv++; argc > 0; argc--,argv++) {
1591 if (argv[0][0] != '-' || !argv[0][1])
1595 validarg = " PHOOEY ";
1599 * Can we rely on the kernel to start scripts with argv[1] set to
1600 * contain all #! line switches (the whole line)? (argv[0] is set to
1601 * the interpreter name, argv[2] to the script name; argv[3] and
1602 * above may contain other arguments.)
1609 #ifndef PERL_STRICT_CR
1634 if ((s = moreswitches(s)))
1639 CHECK_MALLOC_TOO_LATE_FOR('t');
1640 if( !PL_tainting ) {
1641 PL_taint_warn = TRUE;
1647 CHECK_MALLOC_TOO_LATE_FOR('T');
1649 PL_taint_warn = FALSE;
1654 #ifdef MACOS_TRADITIONAL
1655 /* ignore -e for Dev:Pseudo argument */
1656 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1661 PL_e_script = newSVpvn("",0);
1662 filter_add(read_e_script, NULL);
1665 sv_catpv(PL_e_script, s);
1667 sv_catpv(PL_e_script, argv[1]);
1671 Perl_croak(aTHX_ "No code specified for -e");
1672 sv_catpv(PL_e_script, "\n");
1676 #ifdef USE_SITECUSTOMIZE
1682 case 'I': /* -I handled both here and in moreswitches() */
1684 if (!*++s && (s=argv[1]) != Nullch) {
1688 STRLEN len = strlen(s);
1689 const char * const p = savepvn(s, len);
1690 incpush(p, TRUE, TRUE, FALSE, FALSE);
1691 sv_catpvn(sv, "-I", 2);
1692 sv_catpvn(sv, p, len);
1693 sv_catpvn(sv, " ", 1);
1697 Perl_croak(aTHX_ "No directory specified for -I");
1701 PL_preprocess = TRUE;
1714 PL_preambleav = newAV();
1715 av_push(PL_preambleav,
1716 newSVpv("use Config;",0));
1720 opts_prog = newSVpv("print Config::myconfig(),",0);
1722 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1724 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1726 opts = SvCUR(opts_prog);
1728 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1732 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1733 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1735 # ifdef FAKE_THREADS
1738 # ifdef MULTIPLICITY
1744 # ifdef PERL_DONT_CREATE_GVSV
1745 " PERL_DONT_CREATE_GVSV"
1747 # ifdef PERL_GLOBAL_STRUCT
1748 " PERL_GLOBAL_STRUCT"
1750 # ifdef PERL_IMPLICIT_CONTEXT
1751 " PERL_IMPLICIT_CONTEXT"
1753 # ifdef PERL_IMPLICIT_SYS
1754 " PERL_IMPLICIT_SYS"
1756 # ifdef PERL_MALLOC_WRAP
1759 # ifdef PERL_NEED_APPCTX
1762 # ifdef PERL_NEED_TIMESBASE
1763 " PERL_NEED_TIMESBASE"
1765 # ifdef PERL_OLD_COPY_ON_WRITE
1766 " PERL_OLD_COPY_ON_WRITE"
1768 # ifdef PL_OP_SLAB_ALLOC
1771 # ifdef THREADS_HAVE_PIDS
1772 " THREADS_HAVE_PIDS"
1774 # ifdef USE_5005THREADS
1777 # ifdef USE_64_BIT_ALL
1780 # ifdef USE_64_BIT_INT
1783 # ifdef USE_ITHREADS
1786 # ifdef USE_LARGE_FILES
1789 # ifdef USE_LONG_DOUBLE
1795 # ifdef USE_REENTRANT_API
1796 " USE_REENTRANT_API"
1801 # ifdef USE_SITECUSTOMIZE
1802 " USE_SITECUSTOMIZE"
1809 while (SvCUR(opts_prog) > opts+76) {
1810 /* find last space after "options: " and before col 76
1814 char *pv = SvPV_nolen(opts_prog);
1815 const char c = pv[opts+76];
1817 space = strrchr(pv+opts+26, ' ');
1819 if (!space) break; /* "Can't happen" */
1821 /* break the line before that space */
1824 sv_insert(opts_prog, opts, 0,
1828 sv_catpv(opts_prog,"\\n\",");
1830 #if defined(LOCAL_PATCH_COUNT)
1831 if (LOCAL_PATCH_COUNT > 0) {
1834 "\" Locally applied patches:\\n\",");
1835 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1836 if (PL_localpatches[i])
1837 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1838 0, PL_localpatches[i], 0);
1842 Perl_sv_catpvf(aTHX_ opts_prog,
1843 "\" Built under %s\\n\"",OSNAME);
1846 Perl_sv_catpvf(aTHX_ opts_prog,
1847 ",\" Compiled at %s %s\\n\"",__DATE__,
1850 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1854 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1855 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1856 "sort grep {/^PERL/} keys %ENV; ");
1859 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1862 "print \" \\%ENV:\\n @env\\n\" if @env;"
1863 "print \" \\@INC:\\n @INC\\n\";");
1867 opts_prog = Perl_newSVpvf(aTHX_
1868 "Config::config_vars(qw%c%s%c)",
1872 av_push(PL_preambleav, opts_prog);
1873 /* don't look for script or read stdin */
1874 scriptname = BIT_BUCKET;
1878 PL_doextract = TRUE;
1886 if (!*++s || isSPACE(*s)) {
1890 /* catch use of gnu style long options */
1891 if (strEQ(s, "version")) {
1895 if (strEQ(s, "help")) {
1902 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1908 #ifndef SECURE_INTERNAL_GETENV
1911 (s = PerlEnv_getenv("PERL5OPT")))
1913 const char *popt = s;
1916 if (*s == '-' && *(s+1) == 'T') {
1917 CHECK_MALLOC_TOO_LATE_FOR('T');
1919 PL_taint_warn = FALSE;
1922 char *popt_copy = Nullch;
1935 if (!strchr("DIMUdmtwA", *s))
1936 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1940 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1941 s = popt_copy + (s - popt);
1942 d = popt_copy + (d - popt);
1949 if( !PL_tainting ) {
1950 PL_taint_warn = TRUE;
1960 #ifdef USE_SITECUSTOMIZE
1963 PL_preambleav = newAV();
1964 av_unshift(PL_preambleav, 1);
1965 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1969 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1970 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1974 scriptname = argv[0];
1977 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1979 else if (scriptname == Nullch) {
1981 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1987 /* Set $^X early so that it can be used for relocatable paths in @INC */
1988 assert (!PL_tainted);
1990 S_set_caret_X(aTHX);
1994 open_script(scriptname,dosearch,sv);
1996 validate_suid(validarg, scriptname);
1999 #if defined(SIGCHLD) || defined(SIGCLD)
2002 # define SIGCHLD SIGCLD
2004 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2005 if (sigstate == (Sighandler_t) SIG_IGN) {
2006 if (ckWARN(WARN_SIGNAL))
2007 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2008 "Can't ignore signal CHLD, forcing to default");
2009 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2015 #ifdef MACOS_TRADITIONAL
2016 if (PL_doextract || gMacPerl_AlwaysExtract) {
2021 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2022 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2026 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2027 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2028 CvUNIQUE_on(PL_compcv);
2030 CvPADLIST(PL_compcv) = pad_new(0);
2031 #ifdef USE_5005THREADS
2032 CvOWNER(PL_compcv) = 0;
2033 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2034 MUTEX_INIT(CvMUTEXP(PL_compcv));
2035 #endif /* USE_5005THREADS */
2038 boot_core_UNIVERSAL();
2039 boot_core_xsutils();
2042 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2044 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2050 # ifdef HAS_SOCKS5_INIT
2051 socks5_init(argv[0]);
2057 init_predump_symbols();
2058 /* init_postdump_symbols not currently designed to be called */
2059 /* more than once (ENV isn't cleared first, for example) */
2060 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2062 init_postdump_symbols(argc,argv,env);
2064 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2065 * or explicitly in some platforms.
2066 * locale.c:Perl_init_i18nl10n() if the environment
2067 * look like the user wants to use UTF-8. */
2068 #if defined(SYMBIAN)
2069 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2072 /* Requires init_predump_symbols(). */
2073 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2078 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2079 * and the default open disciplines. */
2080 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2081 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2083 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2084 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2085 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2087 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2088 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2089 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2091 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2092 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2093 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2094 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2095 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2098 sv_setpvn(sv, ":utf8\0:utf8", 11);
2100 sv_setpvn(sv, ":utf8\0", 6);
2103 sv_setpvn(sv, "\0:utf8", 6);
2109 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2110 if (strEQ(s, "unsafe"))
2111 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2112 else if (strEQ(s, "safe"))
2113 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2115 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2120 /* now parse the script */
2122 SETERRNO(0,SS_NORMAL);
2124 #ifdef MACOS_TRADITIONAL
2125 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2127 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2129 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2130 MacPerl_MPWFileName(PL_origfilename));
2134 if (yyparse() || PL_error_count) {
2136 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2138 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2143 CopLINE_set(PL_curcop, 0);
2144 PL_curstash = PL_defstash;
2145 PL_preprocess = FALSE;
2147 SvREFCNT_dec(PL_e_script);
2148 PL_e_script = Nullsv;
2155 SAVECOPFILE(PL_curcop);
2156 SAVECOPLINE(PL_curcop);
2157 gv_check(PL_defstash);
2164 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2165 dump_mstats("after compilation:");
2174 =for apidoc perl_run
2176 Tells a Perl interpreter to run. See L<perlembed>.
2188 PERL_UNUSED_ARG(my_perl);
2190 oldscope = PL_scopestack_ix;
2198 cxstack_ix = -1; /* start context stack again */
2200 case 0: /* normal completion */
2204 case 2: /* my_exit() */
2205 while (PL_scopestack_ix > oldscope)
2208 PL_curstash = PL_defstash;
2209 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2210 PL_endav && !PL_minus_c)
2211 call_list(oldscope, PL_endav);
2213 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2214 dump_mstats("after execution: ");
2216 ret = STATUS_NATIVE_EXPORT;
2220 POPSTACK_TO(PL_mainstack);
2223 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2235 S_run_body(pTHX_ I32 oldscope)
2237 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2238 PL_sawampersand ? "Enabling" : "Omitting"));
2240 if (!PL_restartop) {
2241 DEBUG_x(dump_all());
2244 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2246 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2250 #ifdef MACOS_TRADITIONAL
2251 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2252 (gMacPerl_ErrorFormat ? "# " : ""),
2253 MacPerl_MPWFileName(PL_origfilename));
2255 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2259 if (PERLDB_SINGLE && PL_DBsingle)
2260 sv_setiv(PL_DBsingle, 1);
2262 call_list(oldscope, PL_initav);
2268 PL_op = PL_restartop;
2272 else if (PL_main_start) {
2273 CvDEPTH(PL_main_cv) = 1;
2274 PL_op = PL_main_start;
2282 =head1 SV Manipulation Functions
2284 =for apidoc p||get_sv
2286 Returns the SV of the specified Perl scalar. If C<create> is set and the
2287 Perl variable does not exist then it will be created. If C<create> is not
2288 set and the variable does not exist then NULL is returned.
2294 Perl_get_sv(pTHX_ const char *name, I32 create)
2297 #ifdef USE_5005THREADS
2298 if (name[1] == '\0' && !isALPHA(name[0])) {
2299 PADOFFSET tmp = find_threadsv(name);
2300 if (tmp != NOT_IN_PAD)
2301 return THREADSV(tmp);
2303 #endif /* USE_5005THREADS */
2304 gv = gv_fetchpv(name, create, SVt_PV);
2311 =head1 Array Manipulation Functions
2313 =for apidoc p||get_av
2315 Returns the AV of the specified Perl array. If C<create> is set and the
2316 Perl variable does not exist then it will be created. If C<create> is not
2317 set and the variable does not exist then NULL is returned.
2323 Perl_get_av(pTHX_ const char *name, I32 create)
2325 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2334 =head1 Hash Manipulation Functions
2336 =for apidoc p||get_hv
2338 Returns the HV of the specified Perl hash. If C<create> is set and the
2339 Perl variable does not exist then it will be created. If C<create> is not
2340 set and the variable does not exist then NULL is returned.
2346 Perl_get_hv(pTHX_ const char *name, I32 create)
2348 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2357 =head1 CV Manipulation Functions
2359 =for apidoc p||get_cv
2361 Returns the CV of the specified Perl subroutine. If C<create> is set and
2362 the Perl subroutine does not exist then it will be declared (which has the
2363 same effect as saying C<sub name;>). If C<create> is not set and the
2364 subroutine does not exist then NULL is returned.
2370 Perl_get_cv(pTHX_ const char *name, I32 create)
2372 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2373 /* XXX unsafe for threads if eval_owner isn't held */
2374 /* XXX this is probably not what they think they're getting.
2375 * It has the same effect as "sub name;", i.e. just a forward
2377 if (create && !GvCVu(gv))
2378 return newSUB(start_subparse(FALSE, 0),
2379 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2387 /* Be sure to refetch the stack pointer after calling these routines. */
2391 =head1 Callback Functions
2393 =for apidoc p||call_argv
2395 Performs a callback to the specified Perl sub. See L<perlcall>.
2401 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2403 /* See G_* flags in cop.h */
2404 /* null terminated arg list */
2411 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2416 return call_pv(sub_name, flags);
2420 =for apidoc p||call_pv
2422 Performs a callback to the specified Perl sub. See L<perlcall>.
2428 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2429 /* name of the subroutine */
2430 /* See G_* flags in cop.h */
2432 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2436 =for apidoc p||call_method
2438 Performs a callback to the specified Perl method. The blessed object must
2439 be on the stack. See L<perlcall>.
2445 Perl_call_method(pTHX_ const char *methname, I32 flags)
2446 /* name of the subroutine */
2447 /* See G_* flags in cop.h */
2449 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2452 /* May be called with any of a CV, a GV, or an SV containing the name. */
2454 =for apidoc p||call_sv
2456 Performs a callback to the Perl sub whose name is in the SV. See
2463 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2464 /* See G_* flags in cop.h */
2467 LOGOP myop; /* fake syntax tree node */
2470 volatile I32 retval = 0;
2472 bool oldcatch = CATCH_GET;
2477 if (flags & G_DISCARD) {
2482 Zero(&myop, 1, LOGOP);
2483 myop.op_next = Nullop;
2484 if (!(flags & G_NOARGS))
2485 myop.op_flags |= OPf_STACKED;
2486 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2487 (flags & G_ARRAY) ? OPf_WANT_LIST :
2492 EXTEND(PL_stack_sp, 1);
2493 *++PL_stack_sp = sv;
2495 oldscope = PL_scopestack_ix;
2497 if (PERLDB_SUB && PL_curstash != PL_debstash
2498 /* Handle first BEGIN of -d. */
2499 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2500 /* Try harder, since this may have been a sighandler, thus
2501 * curstash may be meaningless. */
2502 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2503 && !(flags & G_NODEBUG))
2504 PL_op->op_private |= OPpENTERSUB_DB;
2506 if (flags & G_METHOD) {
2507 Zero(&method_op, 1, UNOP);
2508 method_op.op_next = PL_op;
2509 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2510 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2511 PL_op = (OP*)&method_op;
2514 if (!(flags & G_EVAL)) {
2516 call_body((OP*)&myop, FALSE);
2517 retval = PL_stack_sp - (PL_stack_base + oldmark);
2518 CATCH_SET(oldcatch);
2521 myop.op_other = (OP*)&myop;
2523 /* we're trying to emulate pp_entertry() here */
2525 register PERL_CONTEXT *cx;
2526 const I32 gimme = GIMME_V;
2531 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2533 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2535 PL_in_eval = EVAL_INEVAL;
2536 if (flags & G_KEEPERR)
2537 PL_in_eval |= EVAL_KEEPERR;
2539 sv_setpvn(ERRSV,"",0);
2547 call_body((OP*)&myop, FALSE);
2548 retval = PL_stack_sp - (PL_stack_base + oldmark);
2549 if (!(flags & G_KEEPERR))
2550 sv_setpvn(ERRSV,"",0);
2556 /* my_exit() was called */
2557 PL_curstash = PL_defstash;
2560 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2561 Perl_croak(aTHX_ "Callback called exit");
2566 PL_op = PL_restartop;
2570 PL_stack_sp = PL_stack_base + oldmark;
2571 if (flags & G_ARRAY)
2575 *++PL_stack_sp = &PL_sv_undef;
2580 if (PL_scopestack_ix > oldscope) {
2584 register PERL_CONTEXT *cx;
2591 PERL_UNUSED_VAR(newsp);
2592 PERL_UNUSED_VAR(gimme);
2593 PERL_UNUSED_VAR(optype);
2598 if (flags & G_DISCARD) {
2599 PL_stack_sp = PL_stack_base + oldmark;
2609 S_call_body(pTHX_ const OP *myop, bool is_eval)
2611 if (PL_op == myop) {
2613 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2615 PL_op = Perl_pp_entersub(aTHX); /* this does */
2621 /* Eval a string. The G_EVAL flag is always assumed. */
2624 =for apidoc p||eval_sv
2626 Tells Perl to C<eval> the string in the SV.
2632 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2634 /* See G_* flags in cop.h */
2637 UNOP myop; /* fake syntax tree node */
2638 volatile I32 oldmark = SP - PL_stack_base;
2639 volatile I32 retval = 0;
2644 if (flags & G_DISCARD) {
2651 Zero(PL_op, 1, UNOP);
2652 EXTEND(PL_stack_sp, 1);
2653 *++PL_stack_sp = sv;
2655 if (!(flags & G_NOARGS))
2656 myop.op_flags = OPf_STACKED;
2657 myop.op_next = Nullop;
2658 myop.op_type = OP_ENTEREVAL;
2659 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2660 (flags & G_ARRAY) ? OPf_WANT_LIST :
2662 if (flags & G_KEEPERR)
2663 myop.op_flags |= OPf_SPECIAL;
2665 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2666 * before a PUSHEVAL, which corrupts the stack after a croak */
2667 TAINT_PROPER("eval_sv()");
2673 call_body((OP*)&myop,TRUE);
2674 retval = PL_stack_sp - (PL_stack_base + oldmark);
2675 if (!(flags & G_KEEPERR))
2676 sv_setpvn(ERRSV,"",0);
2682 /* my_exit() was called */
2683 PL_curstash = PL_defstash;
2686 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2687 Perl_croak(aTHX_ "Callback called exit");
2692 PL_op = PL_restartop;
2696 PL_stack_sp = PL_stack_base + oldmark;
2697 if (flags & G_ARRAY)
2701 *++PL_stack_sp = &PL_sv_undef;
2707 if (flags & G_DISCARD) {
2708 PL_stack_sp = PL_stack_base + oldmark;
2718 =for apidoc p||eval_pv
2720 Tells Perl to C<eval> the given string and return an SV* result.
2726 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2729 SV* sv = newSVpv(p, 0);
2731 eval_sv(sv, G_SCALAR);
2738 if (croak_on_error && SvTRUE(ERRSV)) {
2739 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2745 /* Require a module. */
2748 =head1 Embedding Functions
2750 =for apidoc p||require_pv
2752 Tells Perl to C<require> the file named by the string argument. It is
2753 analogous to the Perl code C<eval "require '$file'">. It's even
2754 implemented that way; consider using load_module instead.
2759 Perl_require_pv(pTHX_ const char *pv)
2763 PUSHSTACKi(PERLSI_REQUIRE);
2765 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2766 eval_sv(sv_2mortal(sv), G_DISCARD);
2772 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2776 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2777 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2781 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2783 /* This message really ought to be max 23 lines.
2784 * Removed -h because the user already knows that option. Others? */
2786 static const char * const usage_msg[] = {
2787 "-0[octal] specify record separator (\\0, if no argument)",
2788 "-A[mod][=pattern] activate all/given assertions",
2789 "-a autosplit mode with -n or -p (splits $_ into @F)",
2790 "-C[number/list] enables the listed Unicode features",
2791 "-c check syntax only (runs BEGIN and CHECK blocks)",
2792 "-d[:debugger] run program under debugger",
2793 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2794 "-e program one line of program (several -e's allowed, omit programfile)",
2795 "-f don't do $sitelib/sitecustomize.pl at startup",
2796 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2797 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2798 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2799 "-l[octal] enable line ending processing, specifies line terminator",
2800 "-[mM][-]module execute \"use/no module...\" before executing program",
2801 "-n assume \"while (<>) { ... }\" loop around program",
2802 "-p assume loop like -n but print line also, like sed",
2803 "-P run program through C preprocessor before compilation",
2804 "-s enable rudimentary parsing for switches after programfile",
2805 "-S look for programfile using PATH environment variable",
2806 "-t enable tainting warnings",
2807 "-T enable tainting checks",
2808 "-u dump core after parsing program",
2809 "-U allow unsafe operations",
2810 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2811 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2812 "-w enable many useful warnings (RECOMMENDED)",
2813 "-W enable all warnings",
2814 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2815 "-X disable all warnings",
2819 const char * const *p = usage_msg;
2821 PerlIO_printf(PerlIO_stdout(),
2822 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2825 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2828 /* convert a string of -D options (or digits) into an int.
2829 * sets *s to point to the char after the options */
2833 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2835 static const char * const usage_msgd[] = {
2836 " Debugging flag values: (see also -d)",
2837 " p Tokenizing and parsing (with v, displays parse stack)",
2838 " s Stack snapshots (with v, displays all stacks)",
2839 " l Context (loop) stack processing",
2840 " t Trace execution",
2841 " o Method and overloading resolution",
2842 " c String/numeric conversions",
2843 " P Print profiling info, preprocessor command for -P, source file input state",
2844 " m Memory allocation",
2845 " f Format processing",
2846 " r Regular expression parsing and execution",
2847 " x Syntax tree dump",
2848 " u Tainting checks",
2849 " H Hash dump -- usurps values()",
2850 " X Scratchpad allocation",
2852 " S Thread synchronization",
2854 " R Include reference counts of dumped variables (eg when using -Ds)",
2855 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2856 " v Verbose: use in conjunction with other flags",
2858 " A Consistency checks on internal structures",
2859 " q quiet - currently only suppresses the 'EXECUTING' message",
2864 /* if adding extra options, remember to update DEBUG_MASK */
2865 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2867 for (; isALNUM(**s); (*s)++) {
2868 const char *d = strchr(debopts,**s);
2870 i |= 1 << (d - debopts);
2871 else if (ckWARN_d(WARN_DEBUGGING))
2872 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2873 "invalid option -D%c, use -D'' to see choices\n", **s);
2876 else if (isDIGIT(**s)) {
2878 for (; isALNUM(**s); (*s)++) ;
2880 else if (givehelp) {
2881 char **p = (char **)usage_msgd;
2882 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2885 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2886 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2887 "-Dp not implemented on this platform\n");
2893 /* This routine handles any switches that can be given during run */
2896 Perl_moreswitches(pTHX_ char *s)
2907 SvREFCNT_dec(PL_rs);
2908 if (s[1] == 'x' && s[2]) {
2909 const char *e = s+=2;
2915 flags = PERL_SCAN_SILENT_ILLDIGIT;
2916 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2917 if (s + numlen < e) {
2918 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2922 PL_rs = newSVpvn("", 0);
2923 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2924 tmps = (U8*)SvPVX(PL_rs);
2925 uvchr_to_utf8(tmps, rschar);
2926 SvCUR_set(PL_rs, UNISKIP(rschar));
2931 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2932 if (rschar & ~((U8)~0))
2933 PL_rs = &PL_sv_undef;
2934 else if (!rschar && numlen >= 2)
2935 PL_rs = newSVpvn("", 0);
2937 char ch = (char)rschar;
2938 PL_rs = newSVpvn(&ch, 1);
2941 sv_setsv(get_sv("/", TRUE), PL_rs);
2946 PL_unicode = parse_unicode_opts( (const char **)&s );
2951 while (*s && !isSPACE(*s)) ++s;
2953 PL_splitstr = savepv(PL_splitstr);
2967 /* -dt indicates to the debugger that threads will be used */
2968 if (*s == 't' && !isALNUM(s[1])) {
2970 my_setenv("PERL5DB_THREADED", "1");
2973 /* The following permits -d:Mod to accepts arguments following an =
2974 in the fashion that -MSome::Mod does. */
2975 if (*s == ':' || *s == '=') {
2978 sv = newSVpv("use Devel::", 0);
2980 /* We now allow -d:Module=Foo,Bar */
2981 while(isALNUM(*s) || *s==':') ++s;
2983 sv_catpv(sv, start);
2985 sv_catpvn(sv, start, s-start);
2986 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
2989 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2992 PL_perldb = PERLDB_ALL;
3001 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3002 #else /* !DEBUGGING */
3003 if (ckWARN_d(WARN_DEBUGGING))
3004 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3005 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3006 for (s++; isALNUM(*s); s++) ;
3011 usage(PL_origargv[0]);
3014 Safefree(PL_inplace);
3015 #if defined(__CYGWIN__) /* do backup extension automagically */
3016 if (*(s+1) == '\0') {
3017 PL_inplace = savepv(".bak");
3020 #endif /* __CYGWIN__ */
3021 PL_inplace = savepv(s+1);
3022 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3026 if (*s == '-') /* Additional switches on #! line. */
3030 case 'I': /* -I handled both here and in parse_body() */
3033 while (*s && isSPACE(*s))
3038 /* ignore trailing spaces (possibly followed by other switches) */
3040 for (e = p; *e && !isSPACE(*e); e++) ;
3044 } while (*p && *p != '-');
3045 e = savepvn(s, e-s);
3046 incpush(e, TRUE, TRUE, FALSE, FALSE);
3053 Perl_croak(aTHX_ "No directory specified for -I");
3059 SvREFCNT_dec(PL_ors_sv);
3065 PL_ors_sv = newSVpvn("\n",1);
3066 numlen = 3 + (*s == '0');
3067 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3071 if (RsPARA(PL_rs)) {
3072 PL_ors_sv = newSVpvn("\n\n",2);
3075 PL_ors_sv = newSVsv(PL_rs);
3082 PL_preambleav = newAV();
3086 SV *sv = newSVpv("use assertions::activate", 24);
3087 while(isALNUM(*s) || *s == ':') ++s;
3089 sv_catpvn(sv, "::", 2);
3090 sv_catpvn(sv, start, s-start);
3093 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3096 else if (*s != '\0') {
3097 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3099 av_push(PL_preambleav, sv);
3103 forbid_setid("-M"); /* XXX ? */
3106 forbid_setid("-m"); /* XXX ? */
3110 const char *use = "use ";
3111 /* -M-foo == 'no foo' */
3112 /* Leading space on " no " is deliberate, to make both
3113 possibilities the same length. */
3114 if (*s == '-') { use = " no "; ++s; }
3115 sv = newSVpvn(use,4);
3117 /* We allow -M'Module qw(Foo Bar)' */
3118 while(isALNUM(*s) || *s==':') ++s;
3120 sv_catpv(sv, start);
3121 if (*(start-1) == 'm') {
3123 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3124 sv_catpv( sv, " ()");
3128 Perl_croak(aTHX_ "Module name required with -%c option",
3130 sv_catpvn(sv, start, s-start);
3131 sv_catpv(sv, " split(/,/,q");
3132 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3134 sv_catpvn(sv, "\0)", 2);
3138 PL_preambleav = newAV();
3139 av_push(PL_preambleav, sv);
3142 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3154 PL_doswitches = TRUE;
3168 #ifdef MACOS_TRADITIONAL
3169 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3171 PL_do_undump = TRUE;
3179 if (!sv_derived_from(PL_patchlevel, "version"))
3180 (void *)upg_version(PL_patchlevel);
3182 PerlIO_printf(PerlIO_stdout(),
3183 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3184 vstringify(PL_patchlevel),
3187 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3188 PerlIO_printf(PerlIO_stdout(),
3189 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3190 vstringify(PL_patchlevel)));
3191 PerlIO_printf(PerlIO_stdout(),
3192 Perl_form(aTHX_ " built under %s at %s %s\n",
3193 OSNAME, __DATE__, __TIME__));
3194 PerlIO_printf(PerlIO_stdout(),
3195 Perl_form(aTHX_ " OS Specific Release: %s\n",
3199 #if defined(LOCAL_PATCH_COUNT)
3200 if (LOCAL_PATCH_COUNT > 0)
3201 PerlIO_printf(PerlIO_stdout(),
3202 "\n(with %d registered patch%s, "
3203 "see perl -V for more detail)",
3204 (int)LOCAL_PATCH_COUNT,
3205 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3208 PerlIO_printf(PerlIO_stdout(),
3209 "\n\nCopyright 1987-2005, Larry Wall\n");
3210 #ifdef MACOS_TRADITIONAL
3211 PerlIO_printf(PerlIO_stdout(),
3212 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3213 "maintained by Chris Nandor\n");
3216 PerlIO_printf(PerlIO_stdout(),
3217 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3220 PerlIO_printf(PerlIO_stdout(),
3221 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3222 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3225 PerlIO_printf(PerlIO_stdout(),
3226 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3227 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3230 PerlIO_printf(PerlIO_stdout(),
3231 "atariST series port, ++jrb bammi@cadence.com\n");
3234 PerlIO_printf(PerlIO_stdout(),
3235 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3238 PerlIO_printf(PerlIO_stdout(),
3239 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3242 PerlIO_printf(PerlIO_stdout(),
3243 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3246 PerlIO_printf(PerlIO_stdout(),
3247 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3250 PerlIO_printf(PerlIO_stdout(),
3251 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "MiNT port by Guido Flohr, 1997-1999\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "EPOC port by Olaf Flebbe, 1999-2002\n");
3266 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3267 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "Symbian port by Nokia, 2004-2005\n");
3274 #ifdef BINARY_BUILD_NOTICE
3275 BINARY_BUILD_NOTICE;
3277 PerlIO_printf(PerlIO_stdout(),
3279 Perl may be copied only under the terms of either the Artistic License or the\n\
3280 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3281 Complete documentation for Perl, including FAQ lists, should be found on\n\
3282 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3283 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3286 if (! (PL_dowarn & G_WARN_ALL_MASK))
3287 PL_dowarn |= G_WARN_ON;
3291 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3292 if (!specialWARN(PL_compiling.cop_warnings))
3293 SvREFCNT_dec(PL_compiling.cop_warnings);
3294 PL_compiling.cop_warnings = pWARN_ALL ;
3298 PL_dowarn = G_WARN_ALL_OFF;
3299 if (!specialWARN(PL_compiling.cop_warnings))
3300 SvREFCNT_dec(PL_compiling.cop_warnings);
3301 PL_compiling.cop_warnings = pWARN_NONE ;
3306 if (s[1] == '-') /* Additional switches on #! line. */
3311 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3317 #ifdef ALTERNATE_SHEBANG
3318 case 'S': /* OS/2 needs -S on "extproc" line. */
3326 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3331 /* compliments of Tom Christiansen */
3333 /* unexec() can be found in the Gnu emacs distribution */
3334 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3337 Perl_my_unexec(pTHX)
3345 prog = newSVpv(BIN_EXP, 0);
3346 sv_catpv(prog, "/perl");
3347 file = newSVpv(PL_origfilename, 0);
3348 sv_catpv(file, ".perldump");
3350 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3351 /* unexec prints msg to stderr in case of failure */
3352 PerlProc_exit(status);
3355 # include <lib$routines.h>
3356 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3358 ABORT(); /* for use with undump */
3363 /* initialize curinterp */
3369 # define PERLVAR(var,type)
3370 # define PERLVARA(var,n,type)
3371 # if defined(PERL_IMPLICIT_CONTEXT)
3372 # if defined(USE_5005THREADS)
3373 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3374 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3375 # else /* !USE_5005THREADS */
3376 # define PERLVARI(var,type,init) aTHX->var = init;
3377 # define PERLVARIC(var,type,init) aTHX->var = init;
3378 # endif /* USE_5005THREADS */
3380 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3381 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3383 # include "intrpvar.h"
3384 # ifndef USE_5005THREADS
3385 # include "thrdvar.h"
3392 # define PERLVAR(var,type)
3393 # define PERLVARA(var,n,type)
3394 # define PERLVARI(var,type,init) PL_##var = init;
3395 # define PERLVARIC(var,type,init) PL_##var = init;
3396 # include "intrpvar.h"
3397 # ifndef USE_5005THREADS
3398 # include "thrdvar.h"
3409 S_init_main_stash(pTHX)
3413 PL_curstash = PL_defstash = newHV();
3414 PL_curstname = newSVpvn("main",4);
3415 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3416 SvREFCNT_dec(GvHV(gv));
3417 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3419 hv_name_set(PL_defstash, "main", 4, 0);
3420 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3421 GvMULTI_on(PL_incgv);
3422 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3423 GvMULTI_on(PL_hintgv);
3424 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3425 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3426 GvMULTI_on(PL_errgv);
3427 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3428 GvMULTI_on(PL_replgv);
3429 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3430 #ifdef PERL_DONT_CREATE_GVSV
3433 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3434 sv_setpvn(ERRSV, "", 0);
3435 PL_curstash = PL_defstash;
3436 CopSTASH_set(&PL_compiling, PL_defstash);
3437 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3438 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3439 /* We must init $/ before switches are processed. */
3440 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3443 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3445 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3450 const char *cpp_discard_flag;
3459 PL_origfilename = savepvn("-e", 2);
3462 /* if find_script() returns, it returns a malloc()-ed value */
3463 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3465 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3466 const char *s = scriptname + 8;
3467 PL_fdscript = atoi(s);
3472 * Tell apart "normal" usage of fdscript, e.g.
3473 * with bash on FreeBSD:
3474 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3475 * from usage in suidperl.
3476 * Does any "normal" usage leave garbage after the number???
3477 * Is it a mistake to use a similar /dev/fd/ construct for
3482 * Be supersafe and do some sanity-checks.
3483 * Still, can we be sure we got the right thing?
3486 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3489 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3491 scriptname = savepv(s + 1);
3492 Safefree(PL_origfilename);
3493 PL_origfilename = (char *)scriptname;
3498 CopFILE_free(PL_curcop);
3499 CopFILE_set(PL_curcop, PL_origfilename);
3500 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3501 scriptname = (char *)"";
3502 if (PL_fdscript >= 0) {
3503 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3504 # if defined(HAS_FCNTL) && defined(F_SETFD)
3506 /* ensure close-on-exec */
3507 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3512 Perl_croak(aTHX_ "sperl needs fd script\n"
3513 "You should not call sperl directly; do you need to "
3514 "change a #! line\nfrom sperl to perl?\n");
3517 * Do not open (or do other fancy stuff) while setuid.
3518 * Perl does the open, and hands script to suidperl on a fd;
3519 * suidperl only does some checks, sets up UIDs and re-execs
3520 * perl with that fd as it has always done.
3523 if (PL_suidscript != 1) {
3524 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3527 else if (PL_preprocess) {
3528 const char *cpp_cfg = CPPSTDIN;
3529 SV *cpp = newSVpvn("",0);
3530 SV *cmd = NEWSV(0,0);
3532 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3533 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3534 if (strEQ(cpp_cfg, "cppstdin"))
3535 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3536 sv_catpv(cpp, cpp_cfg);
3539 sv_catpvn(sv, "-I", 2);
3540 sv_catpv(sv,PRIVLIB_EXP);
3543 DEBUG_P(PerlIO_printf(Perl_debug_log,
3544 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3545 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3548 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3555 cpp_discard_flag = "";
3557 cpp_discard_flag = "-C";
3561 perl = os2_execname(aTHX);
3563 perl = PL_origargv[0];
3567 /* This strips off Perl comments which might interfere with
3568 the C pre-processor, including #!. #line directives are
3569 deliberately stripped to avoid confusion with Perl's version
3570 of #line. FWP played some golf with it so it will fit
3571 into VMS's 255 character buffer.
3574 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3576 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3578 Perl_sv_setpvf(aTHX_ cmd, "\
3579 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3580 perl, quote, code, quote, scriptname, cpp,
3581 cpp_discard_flag, sv, CPPMINUS);
3583 PL_doextract = FALSE;
3585 DEBUG_P(PerlIO_printf(Perl_debug_log,
3586 "PL_preprocess: cmd=\"%s\"\n",
3589 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3593 else if (!*scriptname) {
3594 forbid_setid("program input from stdin");
3595 PL_rsfp = PerlIO_stdin();
3598 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3599 # if defined(HAS_FCNTL) && defined(F_SETFD)
3601 /* ensure close-on-exec */
3602 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3605 #endif /* IAMSUID */
3607 /* PSz 16 Sep 03 Keep neat error message */
3608 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3609 CopFILE(PL_curcop), Strerror(errno));
3614 * I_SYSSTATVFS HAS_FSTATVFS
3616 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3617 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3618 * here so that metaconfig picks them up. */
3622 S_fd_on_nosuid_fs(pTHX_ int fd)
3625 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3626 * but is needed also on machines without setreuid.
3627 * Seems safe enough to run as root.
3629 int check_okay = 0; /* able to do all the required sys/libcalls */
3630 int on_nosuid = 0; /* the fd is on a nosuid fs */
3632 * Need to check noexec also: nosuid might not be set, the average
3633 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3635 int on_noexec = 0; /* the fd is on a noexec fs */
3638 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3639 * fstatvfs() is UNIX98.
3640 * fstatfs() is 4.3 BSD.
3641 * ustat()+getmnt() is pre-4.3 BSD.
3642 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3643 * an irrelevant filesystem while trying to reach the right one.
3646 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3648 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3649 defined(HAS_FSTATVFS)
3650 # define FD_ON_NOSUID_CHECK_OKAY
3651 struct statvfs stfs;
3653 check_okay = fstatvfs(fd, &stfs) == 0;
3654 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3656 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3657 on platforms where it is present. */
3658 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3660 # endif /* fstatvfs */
3662 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3663 defined(PERL_MOUNT_NOSUID) && \
3664 defined(PERL_MOUNT_NOEXEC) && \
3665 defined(HAS_FSTATFS) && \
3666 defined(HAS_STRUCT_STATFS) && \
3667 defined(HAS_STRUCT_STATFS_F_FLAGS)
3668 # define FD_ON_NOSUID_CHECK_OKAY
3671 check_okay = fstatfs(fd, &stfs) == 0;
3672 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3673 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3674 # endif /* fstatfs */
3676 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3677 defined(PERL_MOUNT_NOSUID) && \
3678 defined(PERL_MOUNT_NOEXEC) && \
3679 defined(HAS_FSTAT) && \
3680 defined(HAS_USTAT) && \
3681 defined(HAS_GETMNT) && \
3682 defined(HAS_STRUCT_FS_DATA) && \
3684 # define FD_ON_NOSUID_CHECK_OKAY
3687 if (fstat(fd, &fdst) == 0) {
3689 if (ustat(fdst.st_dev, &us) == 0) {
3691 /* NOSTAT_ONE here because we're not examining fields which
3692 * vary between that case and STAT_ONE. */
3693 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3694 size_t cmplen = sizeof(us.f_fname);
3695 if (sizeof(fsd.fd_req.path) < cmplen)
3696 cmplen = sizeof(fsd.fd_req.path);
3697 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3698 fdst.st_dev == fsd.fd_req.dev) {
3700 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3701 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3707 # endif /* fstat+ustat+getmnt */
3709 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3710 defined(HAS_GETMNTENT) && \
3711 defined(HAS_HASMNTOPT) && \
3712 defined(MNTOPT_NOSUID) && \
3713 defined(MNTOPT_NOEXEC)
3714 # define FD_ON_NOSUID_CHECK_OKAY
3715 FILE *mtab = fopen("/etc/mtab", "r");
3716 struct mntent *entry;
3719 if (mtab && (fstat(fd, &stb) == 0)) {
3720 while (entry = getmntent(mtab)) {
3721 if (stat(entry->mnt_dir, &fsb) == 0
3722 && fsb.st_dev == stb.st_dev)
3724 /* found the filesystem */
3726 if (hasmntopt(entry, MNTOPT_NOSUID))
3728 if (hasmntopt(entry, MNTOPT_NOEXEC))
3731 } /* A single fs may well fail its stat(). */
3736 # endif /* getmntent+hasmntopt */
3739 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3741 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3743 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3744 return ((!check_okay) || on_nosuid || on_noexec);
3746 #endif /* IAMSUID */
3749 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3754 #endif /* IAMSUID */
3756 /* do we need to emulate setuid on scripts? */
3758 /* This code is for those BSD systems that have setuid #! scripts disabled
3759 * in the kernel because of a security problem. Merely defining DOSUID
3760 * in perl will not fix that problem, but if you have disabled setuid
3761 * scripts in the kernel, this will attempt to emulate setuid and setgid
3762 * on scripts that have those now-otherwise-useless bits set. The setuid
3763 * root version must be called suidperl or sperlN.NNN. If regular perl
3764 * discovers that it has opened a setuid script, it calls suidperl with
3765 * the same argv that it had. If suidperl finds that the script it has
3766 * just opened is NOT setuid root, it sets the effective uid back to the
3767 * uid. We don't just make perl setuid root because that loses the
3768 * effective uid we had before invoking perl, if it was different from the
3771 * Description/comments above do not match current workings:
3772 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3773 * suidperl called with script open and name changed to /dev/fd/N/X;
3774 * suidperl croaks if script is not setuid;
3775 * making perl setuid would be a huge security risk (and yes, that
3776 * would lose any euid we might have had).
3778 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3779 * be defined in suidperl only. suidperl must be setuid root. The
3780 * Configure script will set this up for you if you want it.
3786 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3787 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3788 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3790 const char *linestr;
3793 if (PL_fdscript < 0 || PL_suidscript != 1)
3794 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3796 * Since the script is opened by perl, not suidperl, some of these
3797 * checks are superfluous. Leaving them in probably does not lower
3801 * Do checks even for systems with no HAS_SETREUID.
3802 * We used to swap, then re-swap UIDs with
3804 if (setreuid(PL_euid,PL_uid) < 0
3805 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3806 Perl_croak(aTHX_ "Can't swap uid and euid");
3809 if (setreuid(PL_uid,PL_euid) < 0
3810 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3811 Perl_croak(aTHX_ "Can't reswap uid and euid");
3815 /* On this access check to make sure the directories are readable,
3816 * there is actually a small window that the user could use to make
3817 * filename point to an accessible directory. So there is a faint
3818 * chance that someone could execute a setuid script down in a
3819 * non-accessible directory. I don't know what to do about that.
3820 * But I don't think it's too important. The manual lies when
3821 * it says access() is useful in setuid programs.
3823 * So, access() is pretty useless... but not harmful... do anyway.
3825 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3826 Perl_croak(aTHX_ "Can't access() script\n");
3829 /* If we can swap euid and uid, then we can determine access rights
3830 * with a simple stat of the file, and then compare device and
3831 * inode to make sure we did stat() on the same file we opened.
3832 * Then we just have to make sure he or she can execute it.
3835 * As the script is opened by perl, not suidperl, we do not need to
3836 * care much about access rights.
3838 * The 'script changed' check is needed, or we can get lied to
3839 * about $0 with e.g.
3840 * suidperl /dev/fd/4//bin/x 4<setuidscript
3841 * Without HAS_SETREUID, is it safe to stat() as root?
3843 * Are there any operating systems that pass /dev/fd/xxx for setuid
3844 * scripts, as suggested/described in perlsec(1)? Surely they do not
3845 * pass the script name as we do, so the "script changed" test would
3846 * fail for them... but we never get here with
3847 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3849 * This is one place where we must "lie" about return status: not
3850 * say if the stat() failed. We are doing this as root, and could
3851 * be tricked into reporting existence or not of files that the
3852 * "plain" user cannot even see.
3856 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3857 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3858 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3859 Perl_croak(aTHX_ "Setuid script changed\n");
3863 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3864 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3867 * We used to do this check as the "plain" user (after swapping
3868 * UIDs). But the check for nosuid and noexec filesystem is needed,
3869 * and should be done even without HAS_SETREUID. (Maybe those
3870 * operating systems do not have such mount options anyway...)
3871 * Seems safe enough to do as root.
3873 #if !defined(NO_NOSUID_CHECK)
3874 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3875 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3878 #endif /* IAMSUID */
3880 if (!S_ISREG(PL_statbuf.st_mode)) {
3881 Perl_croak(aTHX_ "Setuid script not plain file\n");
3883 if (PL_statbuf.st_mode & S_IWOTH)
3884 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3885 PL_doswitches = FALSE; /* -s is insecure in suid */
3886 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3887 CopLINE_inc(PL_curcop);
3888 linestr = SvPV_nolen_const(PL_linestr);
3889 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3890 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3891 Perl_croak(aTHX_ "No #! line");
3895 /* Sanity check on line length */
3896 if (strlen(s) < 1 || strlen(s) > 4000)
3897 Perl_croak(aTHX_ "Very long #! line");
3898 /* Allow more than a single space after #! */
3899 while (isSPACE(*s)) s++;
3900 /* Sanity check on buffer end */
3901 while ((*s) && !isSPACE(*s)) s++;
3902 for (s2 = s; (s2 > linestr &&
3903 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3904 || s2[-1] == '-')); s2--) ;
3905 /* Sanity check on buffer start */
3906 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3907 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3908 Perl_croak(aTHX_ "Not a perl script");
3909 while (*s == ' ' || *s == '\t') s++;
3911 * #! arg must be what we saw above. They can invoke it by
3912 * mentioning suidperl explicitly, but they may not add any strange
3913 * arguments beyond what #! says if they do invoke suidperl that way.
3916 * The way validarg was set up, we rely on the kernel to start
3917 * scripts with argv[1] set to contain all #! line switches (the
3921 * Check that we got all the arguments listed in the #! line (not
3922 * just that there are no extraneous arguments). Might not matter
3923 * much, as switches from #! line seem to be acted upon (also), and
3924 * so may be checked and trapped in perl. But, security checks must
3925 * be done in suidperl and not deferred to perl. Note that suidperl
3926 * does not get around to parsing (and checking) the switches on
3927 * the #! line (but execs perl sooner).
3928 * Allow (require) a trailing newline (which may be of two
3929 * characters on some architectures?) (but no other trailing
3932 len = strlen(validarg);
3933 if (strEQ(validarg," PHOOEY ") ||
3934 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3935 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3936 Perl_croak(aTHX_ "Args must match #! line");
3939 if (PL_fdscript < 0 &&
3940 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3941 PL_euid == PL_statbuf.st_uid)
3943 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3944 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3945 #endif /* IAMSUID */
3947 if (PL_fdscript < 0 &&
3948 PL_euid) { /* oops, we're not the setuid root perl */
3950 * When root runs a setuid script, we do not go through the same
3951 * steps of execing sperl and then perl with fd scripts, but
3952 * simply set up UIDs within the same perl invocation; so do
3953 * not have the same checks (on options, whatever) that we have
3954 * for plain users. No problem really: would have to be a script
3955 * that does not actually work for plain users; and if root is
3956 * foolish and can be persuaded to run such an unsafe script, he
3957 * might run also non-setuid ones, and deserves what he gets.
3959 * Or, we might drop the PL_euid check above (and rely just on
3960 * PL_fdscript to avoid loops), and do the execs
3966 * Pass fd script to suidperl.
3967 * Exec suidperl, substituting fd script for scriptname.
3968 * Pass script name as "subdir" of fd, which perl will grok;
3969 * in fact will use that to distinguish this from "normal"
3970 * usage, see comments above.
3972 PerlIO_rewind(PL_rsfp);
3973 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3974 /* PSz 27 Feb 04 Sanity checks on scriptname */
3975 if ((!scriptname) || (!*scriptname) ) {
3976 Perl_croak(aTHX_ "No setuid script name\n");
3978 if (*scriptname == '-') {
3979 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3980 /* Or we might confuse it with an option when replacing
3981 * name in argument list, below (though we do pointer, not
3982 * string, comparisons).
3985 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3986 if (!PL_origargv[which]) {
3987 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3989 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3990 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3991 #if defined(HAS_FCNTL) && defined(F_SETFD)
3992 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3995 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3996 (int)PERL_REVISION, (int)PERL_VERSION,
3997 (int)PERL_SUBVERSION), PL_origargv);
3999 #endif /* IAMSUID */
4000 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4003 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4005 * This seems back to front: we try HAS_SETEGID first; if not available
4006 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4007 * in the sense that we only want to set EGID; but are there any machines
4008 * with either of the latter, but not the former? Same with UID, later.
4011 (void)setegid(PL_statbuf.st_gid);
4014 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4016 #ifdef HAS_SETRESGID
4017 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4019 PerlProc_setgid(PL_statbuf.st_gid);
4023 if (PerlProc_getegid() != PL_statbuf.st_gid)
4024 Perl_croak(aTHX_ "Can't do setegid!\n");
4026 if (PL_statbuf.st_mode & S_ISUID) {
4027 if (PL_statbuf.st_uid != PL_euid)
4029 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4032 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4034 #ifdef HAS_SETRESUID
4035 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4037 PerlProc_setuid(PL_statbuf.st_uid);
4041 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4042 Perl_croak(aTHX_ "Can't do seteuid!\n");
4044 else if (PL_uid) { /* oops, mustn't run as root */
4046 (void)seteuid((Uid_t)PL_uid);
4049 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4051 #ifdef HAS_SETRESUID
4052 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4054 PerlProc_setuid((Uid_t)PL_uid);
4058 if (PerlProc_geteuid() != PL_uid)
4059 Perl_croak(aTHX_ "Can't do seteuid!\n");
4062 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4063 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4066 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4067 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4068 else if (PL_fdscript < 0 || PL_suidscript != 1)
4069 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4070 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4072 /* PSz 16 Sep 03 Keep neat error message */
4073 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4076 /* We absolutely must clear out any saved ids here, so we */
4077 /* exec the real perl, substituting fd script for scriptname. */
4078 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4080 * It might be thought that using setresgid and/or setresuid (changed to
4081 * set the saved IDs) above might obviate the need to exec, and we could
4082 * go on to "do the perl thing".
4084 * Is there such a thing as "saved GID", and is that set for setuid (but
4085 * not setgid) execution like suidperl? Without exec, it would not be
4086 * cleared for setuid (but not setgid) scripts (or might need a dummy
4089 * We need suidperl to do the exact same argument checking that perl
4090 * does. Thus it cannot be very small; while it could be significantly
4091 * smaller, it is safer (simpler?) to make it essentially the same
4092 * binary as perl (but they are not identical). - Maybe could defer that
4093 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4094 * but prefer to do thorough checks in suidperl itself. Such deferral
4095 * would make suidperl security rely on perl, a design no-no.
4097 * Setuid things should be short and simple, thus easy to understand and
4098 * verify. They should do their "own thing", without influence by
4099 * attackers. It may help if their internal execution flow is fixed,
4100 * regardless of platform: it may be best to exec anyway.
4102 * Suidperl should at least be conceptually simple: a wrapper only,
4103 * never to do any real perl. Maybe we should put
4105 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4107 * into the perly bits.
4109 PerlIO_rewind(PL_rsfp);
4110 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4112 * Keep original arguments: suidperl already has fd script.
4114 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4115 /* if (!PL_origargv[which]) { */
4116 /* errno = EPERM; */
4117 /* Perl_croak(aTHX_ "Permission denied\n"); */
4119 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4120 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4121 #if defined(HAS_FCNTL) && defined(F_SETFD)
4122 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4125 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4126 (int)PERL_REVISION, (int)PERL_VERSION,
4127 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4129 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4130 #endif /* IAMSUID */
4132 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4133 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4134 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4135 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4137 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4140 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4141 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4142 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4143 /* not set-id, must be wrapped */
4151 S_find_beginning(pTHX)
4154 register const char *s2;
4155 #ifdef MACOS_TRADITIONAL
4159 /* skip forward in input to the real script? */
4162 #ifdef MACOS_TRADITIONAL
4163 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4165 while (PL_doextract || gMacPerl_AlwaysExtract) {
4166 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4167 if (!gMacPerl_AlwaysExtract)
4168 Perl_croak(aTHX_ "No Perl script found in input\n");
4170 if (PL_doextract) /* require explicit override ? */
4171 if (!OverrideExtract(PL_origfilename))
4172 Perl_croak(aTHX_ "User aborted script\n");
4174 PL_doextract = FALSE;
4176 /* Pater peccavi, file does not have #! */
4177 PerlIO_rewind(PL_rsfp);
4182 while (PL_doextract) {
4183 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4184 Perl_croak(aTHX_ "No Perl script found in input\n");
4187 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4188 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4189 PL_doextract = FALSE;
4190 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4192 while (*s == ' ' || *s == '\t') s++;
4194 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4195 || s2[-1] == '_') s2--;
4196 if (strnEQ(s2-4,"perl",4))
4197 while ((s = moreswitches(s)))
4200 #ifdef MACOS_TRADITIONAL
4201 /* We are always searching for the #!perl line in MacPerl,
4202 * so if we find it, still keep the line count correct
4203 * by counting lines we already skipped over
4205 for (; maclines > 0 ; maclines--)
4206 PerlIO_ungetc(PL_rsfp, '\n');
4210 /* gMacPerl_AlwaysExtract is false in MPW tool */
4211 } else if (gMacPerl_AlwaysExtract) {
4222 PL_uid = PerlProc_getuid();
4223 PL_euid = PerlProc_geteuid();
4224 PL_gid = PerlProc_getgid();
4225 PL_egid = PerlProc_getegid();
4227 PL_uid |= PL_gid << 16;
4228 PL_euid |= PL_egid << 16;
4230 /* Should not happen: */
4231 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4232 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4235 * Should go by suidscript, not uid!=euid: why disallow
4236 * system("ls") in scripts run from setuid things?
4237 * Or, is this run before we check arguments and set suidscript?
4238 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4239 * (We never have suidscript, can we be sure to have fdscript?)
4240 * Or must then go by UID checks? See comments in forbid_setid also.
4244 /* This is used very early in the lifetime of the program,
4245 * before even the options are parsed, so PL_tainting has
4246 * not been initialized properly. */
4248 Perl_doing_taint(int argc, char *argv[], char *envp[])
4250 #ifndef PERL_IMPLICIT_SYS
4251 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4252 * before we have an interpreter-- and the whole point of this
4253 * function is to be called at such an early stage. If you are on
4254 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4255 * "tainted because running with altered effective ids', you'll
4256 * have to add your own checks somewhere in here. The two most
4257 * known samples of 'implicitness' are Win32 and NetWare, neither
4258 * of which has much of concept of 'uids'. */
4259 int uid = PerlProc_getuid();
4260 int euid = PerlProc_geteuid();
4261 int gid = PerlProc_getgid();
4262 int egid = PerlProc_getegid();
4269 if (uid && (euid != uid || egid != gid))
4271 #endif /* !PERL_IMPLICIT_SYS */
4272 /* This is a really primitive check; environment gets ignored only
4273 * if -T are the first chars together; otherwise one gets
4274 * "Too late" message. */
4275 if ( argc > 1 && argv[1][0] == '-'
4276 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4282 S_forbid_setid(pTHX_ const char *s)
4284 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4285 if (PL_euid != PL_uid)
4286 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4287 if (PL_egid != PL_gid)
4288 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4289 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4291 * Checks for UID/GID above "wrong": why disallow
4292 * perl -e 'print "Hello\n"'
4293 * from within setuid things?? Simply drop them: replaced by
4294 * fdscript/suidscript and #ifdef IAMSUID checks below.
4296 * This may be too late for command-line switches. Will catch those on
4297 * the #! line, after finding the script name and setting up
4298 * fdscript/suidscript. Note that suidperl does not get around to
4299 * parsing (and checking) the switches on the #! line, but checks that
4300 * the two sets are identical.
4302 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4303 * instead, or would that be "too late"? (We never have suidscript, can
4304 * we be sure to have fdscript?)
4306 * Catch things with suidscript (in descendant of suidperl), even with
4307 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4308 * below; but I am paranoid.
4310 * Also see comments about root running a setuid script, elsewhere.
4312 if (PL_suidscript >= 0)
4313 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4315 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4316 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4317 #endif /* IAMSUID */
4321 Perl_init_debugger(pTHX)
4323 HV *ostash = PL_curstash;
4325 PL_curstash = PL_debstash;
4326 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4327 AvREAL_off(PL_dbargs);
4328 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4329 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4330 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4331 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4332 sv_setiv(PL_DBsingle, 0);
4333 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4334 sv_setiv(PL_DBtrace, 0);
4335 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4336 sv_setiv(PL_DBsignal, 0);
4337 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4338 sv_setiv(PL_DBassertion, 0);
4339 PL_curstash = ostash;
4342 #ifndef STRESS_REALLOC
4343 #define REASONABLE(size) (size)
4345 #define REASONABLE(size) (1) /* unreasonable */
4349 Perl_init_stacks(pTHX)
4351 /* start with 128-item stack and 8K cxstack */
4352 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4353 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4354 PL_curstackinfo->si_type = PERLSI_MAIN;
4355 PL_curstack = PL_curstackinfo->si_stack;
4356 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4358 PL_stack_base = AvARRAY(PL_curstack);
4359 PL_stack_sp = PL_stack_base;
4360 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4362 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4365 PL_tmps_max = REASONABLE(128);
4367 Newx(PL_markstack,REASONABLE(32),I32);
4368 PL_markstack_ptr = PL_markstack;
4369 PL_markstack_max = PL_markstack + REASONABLE(32);
4373 Newx(PL_scopestack,REASONABLE(32),I32);
4374 PL_scopestack_ix = 0;
4375 PL_scopestack_max = REASONABLE(32);
4377 Newx(PL_savestack,REASONABLE(128),ANY);
4378 PL_savestack_ix = 0;
4379 PL_savestack_max = REASONABLE(128);
4387 while (PL_curstackinfo->si_next)
4388 PL_curstackinfo = PL_curstackinfo->si_next;
4389 while (PL_curstackinfo) {
4390 PERL_SI *p = PL_curstackinfo->si_prev;
4391 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4392 Safefree(PL_curstackinfo->si_cxstack);
4393 Safefree(PL_curstackinfo);
4394 PL_curstackinfo = p;
4396 Safefree(PL_tmps_stack);
4397 Safefree(PL_markstack);
4398 Safefree(PL_scopestack);
4399 Safefree(PL_savestack);
4408 lex_start(PL_linestr);
4410 PL_subname = newSVpvn("main",4);
4414 S_init_predump_symbols(pTHX)
4419 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4420 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4421 GvMULTI_on(PL_stdingv);
4422 io = GvIOp(PL_stdingv);
4423 IoTYPE(io) = IoTYPE_RDONLY;
4424 IoIFP(io) = PerlIO_stdin();
4425 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4427 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4429 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4432 IoTYPE(io) = IoTYPE_WRONLY;
4433 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4435 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4437 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4439 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4440 GvMULTI_on(PL_stderrgv);
4441 io = GvIOp(PL_stderrgv);
4442 IoTYPE(io) = IoTYPE_WRONLY;
4443 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4444 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4446 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4448 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4450 Safefree(PL_osname);
4451 PL_osname = savepv(OSNAME);
4455 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4457 argc--,argv++; /* skip name of script */
4458 if (PL_doswitches) {
4459 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4463 if (argv[0][1] == '-' && !argv[0][2]) {
4467 if ((s = strchr(argv[0], '='))) {
4469 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4472 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4475 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4476 GvMULTI_on(PL_argvgv);
4477 (void)gv_AVadd(PL_argvgv);
4478 av_clear(GvAVn(PL_argvgv));
4479 for (; argc > 0; argc--,argv++) {
4480 SV * const sv = newSVpv(argv[0],0);
4481 av_push(GvAVn(PL_argvgv),sv);
4482 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4483 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4486 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4487 (void)sv_utf8_decode(sv);
4493 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4498 PL_toptarget = NEWSV(0,0);
4499 sv_upgrade(PL_toptarget, SVt_PVFM);
4500 sv_setpvn(PL_toptarget, "", 0);
4501 PL_bodytarget = NEWSV(0,0);
4502 sv_upgrade(PL_bodytarget, SVt_PVFM);
4503 sv_setpvn(PL_bodytarget, "", 0);
4504 PL_formtarget = PL_bodytarget;
4508 init_argv_symbols(argc,argv);
4510 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4511 #ifdef MACOS_TRADITIONAL
4512 /* $0 is not majick on a Mac */
4513 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4515 sv_setpv(GvSV(tmpgv),PL_origfilename);
4516 magicname("0", "0", 1);
4519 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4521 GvMULTI_on(PL_envgv);
4522 hv = GvHVn(PL_envgv);
4523 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4525 #ifdef USE_ENVIRON_ARRAY
4526 /* Note that if the supplied env parameter is actually a copy
4527 of the global environ then it may now point to free'd memory
4528 if the environment has been modified since. To avoid this
4529 problem we treat env==NULL as meaning 'use the default'
4534 # ifdef USE_ITHREADS
4535 && PL_curinterp == aTHX
4539 environ[0] = Nullch;
4542 char** origenv = environ;
4545 for (; *env; env++) {
4546 if (!(s = strchr(*env,'=')) || s == *env)
4548 #if defined(MSDOS) && !defined(DJGPP)
4553 sv = newSVpv(s+1, 0);
4554 (void)hv_store(hv, *env, s - *env, sv, 0);
4557 if (origenv != environ) {
4558 /* realloc has shifted us */
4559 env = (env - origenv) + environ;
4564 #endif /* USE_ENVIRON_ARRAY */
4565 #endif /* !PERL_MICRO */
4568 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4569 SvREADONLY_off(GvSV(tmpgv));
4570 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4571 SvREADONLY_on(GvSV(tmpgv));
4573 #ifdef THREADS_HAVE_PIDS
4574 PL_ppid = (IV)getppid();
4577 /* touch @F array to prevent spurious warnings 20020415 MJD */
4579 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4581 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4582 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4583 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4587 S_init_perllib(pTHX)
4592 s = PerlEnv_getenv("PERL5LIB");
4594 incpush(s, TRUE, TRUE, TRUE, FALSE);
4596 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4598 /* Treat PERL5?LIB as a possible search list logical name -- the
4599 * "natural" VMS idiom for a Unix path string. We allow each
4600 * element to be a set of |-separated directories for compatibility.
4604 if (my_trnlnm("PERL5LIB",buf,0))
4605 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4607 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4611 /* Use the ~-expanded versions of APPLLIB (undocumented),
4612 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4615 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4619 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4621 #ifdef MACOS_TRADITIONAL
4624 SV * privdir = NEWSV(55, 0);
4625 char * macperl = PerlEnv_getenv("MACPERL");
4630 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4631 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4632 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4633 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4634 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4635 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4637 SvREFCNT_dec(privdir);
4640 incpush(":", FALSE, FALSE, TRUE, FALSE);
4643 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4646 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4648 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4652 /* sitearch is always relative to sitelib on Windows for
4653 * DLL-based path intuition to work correctly */
4654 # if !defined(WIN32)
4655 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4661 /* this picks up sitearch as well */
4662 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4664 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4668 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4669 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4672 #ifdef PERL_VENDORARCH_EXP
4673 /* vendorarch is always relative to vendorlib on Windows for
4674 * DLL-based path intuition to work correctly */
4675 # if !defined(WIN32)
4676 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4680 #ifdef PERL_VENDORLIB_EXP
4682 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4684 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4688 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4689 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4692 #ifdef PERL_OTHERLIBDIRS
4693 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4697 incpush(".", FALSE, FALSE, TRUE, FALSE);
4698 #endif /* MACOS_TRADITIONAL */
4701 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4702 # define PERLLIB_SEP ';'
4705 # define PERLLIB_SEP '|'
4707 # if defined(MACOS_TRADITIONAL)
4708 # define PERLLIB_SEP ','
4710 # define PERLLIB_SEP ':'
4714 #ifndef PERLLIB_MANGLE
4715 # define PERLLIB_MANGLE(s,n) (s)
4718 /* Push a directory onto @INC if it exists.
4719 Generate a new SV if we do this, to save needing to copy the SV we push
4722 S_incpush_if_exists(pTHX_ SV *dir)
4725 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4726 S_ISDIR(tmpstatbuf.st_mode)) {
4727 av_push(GvAVn(PL_incgv), dir);
4734 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4737 SV *subdir = Nullsv;
4738 const char *p = dir;
4743 if (addsubdirs || addoldvers) {
4744 subdir = NEWSV(0,0);
4747 /* Break at all separators */
4749 SV *libdir = NEWSV(55,0);
4752 /* skip any consecutive separators */
4754 while ( *p == PERLLIB_SEP ) {
4755 /* Uncomment the next line for PATH semantics */
4756 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4761 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4762 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4767 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4768 p = Nullch; /* break out */
4770 #ifdef MACOS_TRADITIONAL
4771 if (!strchr(SvPVX(libdir), ':')) {
4774 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4776 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4777 sv_catpv(libdir, ":");
4780 /* Do the if() outside the #ifdef to avoid warnings about an unused
4783 #ifdef PERL_RELOCATABLE_INC
4785 * Relocatable include entries are marked with a leading .../
4788 * 0: Remove that leading ".../"
4789 * 1: Remove trailing executable name (anything after the last '/')
4790 * from the perl path to give a perl prefix
4792 * While the @INC element starts "../" and the prefix ends with a real
4793 * directory (ie not . or ..) chop that real directory off the prefix
4794 * and the leading "../" from the @INC element. ie a logical "../"
4796 * Finally concatenate the prefix and the remainder of the @INC element
4797 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4798 * generates /usr/local/lib/perl5
4800 const char *libpath = SvPVX(libdir);
4801 STRLEN libpath_len = SvCUR(libdir);
4802 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4804 SV * const caret_X = get_sv("\030", 0);
4805 /* Going to use the SV just as a scratch buffer holding a C
4811 /* $^X is *the* source of taint if tainting is on, hence
4812 SvPOK() won't be true. */
4814 assert(SvPOKp(caret_X));
4815 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4816 /* Firstly take off the leading .../
4817 If all else fail we'll do the paths relative to the current
4819 sv_chop(libdir, libpath + 4);
4820 /* Don't use SvPV as we're intentionally bypassing taining,
4821 mortal copies that the mg_get of tainting creates, and
4822 corruption that seems to come via the save stack.
4823 I guess that the save stack isn't correctly set up yet. */
4824 libpath = SvPVX(libdir);
4825 libpath_len = SvCUR(libdir);
4827 /* This would work more efficiently with memrchr, but as it's
4828 only a GNU extension we'd need to probe for it and
4829 implement our own. Not hard, but maybe not worth it? */
4831 prefix = SvPVX(prefix_sv);
4832 lastslash = strrchr(prefix, '/');
4834 /* First time in with the *lastslash = '\0' we just wipe off
4835 the trailing /perl from (say) /usr/foo/bin/perl
4839 while ((*lastslash = '\0'), /* Do that, come what may. */
4840 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4841 && (lastslash = strrchr(prefix, '/')))) {
4842 if (lastslash[1] == '\0'
4843 || (lastslash[1] == '.'
4844 && (lastslash[2] == '/' /* ends "/." */
4845 || (lastslash[2] == '/'
4846 && lastslash[3] == '/' /* or "/.." */
4848 /* Prefix ends "/" or "/." or "/..", any of which
4849 are fishy, so don't do any more logical cleanup.
4853 /* Remove leading "../" from path */
4856 /* Next iteration round the loop removes the last
4857 directory name from prefix by writing a '\0' in
4858 the while clause. */
4860 /* prefix has been terminated with a '\0' to the correct
4861 length. libpath points somewhere into the libdir SV.
4862 We need to join the 2 with '/' and drop the result into
4864 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4865 SvREFCNT_dec(libdir);
4866 /* And this is the new libdir. */
4869 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4870 /* Need to taint reloccated paths if running set ID */
4871 SvTAINTED_on(libdir);
4874 SvREFCNT_dec(prefix_sv);
4879 * BEFORE pushing libdir onto @INC we may first push version- and
4880 * archname-specific sub-directories.
4882 if (addsubdirs || addoldvers) {
4883 #ifdef PERL_INC_VERSION_LIST
4884 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4885 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4886 const char **incver;
4892 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4894 while (unix[len-1] == '/') len--; /* Cosmetic */
4895 sv_usepvn(libdir,unix,len);
4898 PerlIO_printf(Perl_error_log,
4899 "Failed to unixify @INC element \"%s\"\n",
4903 #ifdef MACOS_TRADITIONAL
4904 #define PERL_AV_SUFFIX_FMT ""
4905 #define PERL_ARCH_FMT "%s:"
4906 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4908 #define PERL_AV_SUFFIX_FMT "/"
4909 #define PERL_ARCH_FMT "/%s"
4910 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4912 /* .../version/archname if -d .../version/archname */
4913 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4915 (int)PERL_REVISION, (int)PERL_VERSION,
4916 (int)PERL_SUBVERSION, ARCHNAME);
4917 subdir = S_incpush_if_exists(aTHX_ subdir);
4919 /* .../version if -d .../version */
4920 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4921 (int)PERL_REVISION, (int)PERL_VERSION,
4922 (int)PERL_SUBVERSION);
4923 subdir = S_incpush_if_exists(aTHX_ subdir);
4925 /* .../archname if -d .../archname */
4926 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4927 subdir = S_incpush_if_exists(aTHX_ subdir);
4931 #ifdef PERL_INC_VERSION_LIST
4933 for (incver = incverlist; *incver; incver++) {
4934 /* .../xxx if -d .../xxx */
4935 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4936 subdir = S_incpush_if_exists(aTHX_ subdir);
4942 /* finally push this lib directory on the end of @INC */
4943 av_push(GvAVn(PL_incgv), libdir);
4946 assert (SvREFCNT(subdir) == 1);
4947 SvREFCNT_dec(subdir);
4951 #ifdef USE_5005THREADS
4952 STATIC struct perl_thread *
4953 S_init_main_thread(pTHX)
4955 #if !defined(PERL_IMPLICIT_CONTEXT)
4956 struct perl_thread *thr;
4960 Newxz(thr, 1, struct perl_thread);
4961 PL_curcop = &PL_compiling;
4962 thr->interp = PERL_GET_INTERP;
4963 thr->cvcache = newHV();
4964 thr->threadsv = newAV();
4965 /* thr->threadsvp is set when find_threadsv is called */
4966 thr->specific = newAV();
4967 thr->flags = THRf_R_JOINABLE;
4968 MUTEX_INIT(&thr->mutex);
4969 /* Handcraft thrsv similarly to mess_sv */
4970 Newx(PL_thrsv, 1, SV);
4972 SvFLAGS(PL_thrsv) = SVt_PV;
4973 SvANY(PL_thrsv) = (void*)xpv;
4974 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4975 SvPV_set(PL_thrsvr, (char*)thr);
4976 SvCUR_set(PL_thrsv, sizeof(thr));
4977 SvLEN_set(PL_thrsv, sizeof(thr));
4978 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4979 thr->oursv = PL_thrsv;
4980 PL_chopset = " \n-";
4983 MUTEX_LOCK(&PL_threads_mutex);
4989 MUTEX_UNLOCK(&PL_threads_mutex);
4991 #ifdef HAVE_THREAD_INTERN
4992 Perl_init_thread_intern(thr);
4995 #ifdef SET_THREAD_SELF
4996 SET_THREAD_SELF(thr);
4998 thr->self = pthread_self();
4999 #endif /* SET_THREAD_SELF */
5003 * These must come after the thread self setting
5004 * because sv_setpvn does SvTAINT and the taint
5005 * fields thread selfness being set.
5007 PL_toptarget = NEWSV(0,0);
5008 sv_upgrade(PL_toptarget, SVt_PVFM);
5009 sv_setpvn(PL_toptarget, "", 0);
5010 PL_bodytarget = NEWSV(0,0);
5011 sv_upgrade(PL_bodytarget, SVt_PVFM);
5012 sv_setpvn(PL_bodytarget, "", 0);
5013 PL_formtarget = PL_bodytarget;
5014 thr->errsv = newSVpvn("", 0);
5015 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5018 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5019 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5020 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5021 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5022 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5023 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5025 PL_reginterp_cnt = 0;
5029 #endif /* USE_5005THREADS */
5032 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5036 const line_t oldline = CopLINE(PL_curcop);
5042 while (av_len(paramList) >= 0) {
5043 cv = (CV*)av_shift(paramList);
5045 if (paramList == PL_beginav) {
5046 /* save PL_beginav for compiler */
5047 if (! PL_beginav_save)
5048 PL_beginav_save = newAV();
5049 av_push(PL_beginav_save, (SV*)cv);
5051 else if (paramList == PL_checkav) {
5052 /* save PL_checkav for compiler */
5053 if (! PL_checkav_save)
5054 PL_checkav_save = newAV();
5055 av_push(PL_checkav_save, (SV*)cv);
5065 (void)SvPV_const(atsv, len);
5067 PL_curcop = &PL_compiling;
5068 CopLINE_set(PL_curcop, oldline);
5069 if (paramList == PL_beginav)
5070 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5072 Perl_sv_catpvf(aTHX_ atsv,
5073 "%s failed--call queue aborted",
5074 paramList == PL_checkav ? "CHECK"
5075 : paramList == PL_initav ? "INIT"
5077 while (PL_scopestack_ix > oldscope)
5080 Perl_croak(aTHX_ "%"SVf"", atsv);
5087 /* my_exit() was called */
5088 while (PL_scopestack_ix > oldscope)
5091 PL_curstash = PL_defstash;
5092 PL_curcop = &PL_compiling;
5093 CopLINE_set(PL_curcop, oldline);
5095 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5096 if (paramList == PL_beginav)
5097 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5099 Perl_croak(aTHX_ "%s failed--call queue aborted",
5100 paramList == PL_checkav ? "CHECK"
5101 : paramList == PL_initav ? "INIT"
5108 PL_curcop = &PL_compiling;
5109 CopLINE_set(PL_curcop, oldline);
5112 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5121 S_call_list_body(pTHX_ CV *cv)
5123 PUSHMARK(PL_stack_sp);
5124 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5129 Perl_my_exit(pTHX_ U32 status)
5131 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5132 thr, (unsigned long) status));
5141 STATUS_NATIVE_SET(status);
5148 Perl_my_failure_exit(pTHX)
5151 if (vaxc$errno & 1) {
5152 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5153 STATUS_NATIVE_SET(44);
5156 if (!vaxc$errno) /* unlikely */
5157 STATUS_NATIVE_SET(44);
5159 STATUS_NATIVE_SET(vaxc$errno);
5164 STATUS_UNIX_SET(errno);
5166 exitstatus = STATUS_UNIX >> 8;
5167 if (exitstatus & 255)
5168 STATUS_UNIX_SET(exitstatus);
5170 STATUS_UNIX_SET(255);
5177 S_my_exit_jump(pTHX)
5180 register PERL_CONTEXT *cx;
5185 SvREFCNT_dec(PL_e_script);
5186 PL_e_script = Nullsv;
5189 POPSTACK_TO(PL_mainstack);
5190 if (cxstack_ix >= 0) {
5193 POPBLOCK(cx,PL_curpm);
5198 PERL_UNUSED_VAR(gimme);
5199 PERL_UNUSED_VAR(newsp);
5203 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5205 const char * const p = SvPVX_const(PL_e_script);
5206 const char *nl = strchr(p, '\n');
5208 PERL_UNUSED_ARG(idx);
5209 PERL_UNUSED_ARG(maxlen);
5211 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5213 filter_del(read_e_script);
5216 sv_catpvn(buf_sv, p, nl-p);
5217 sv_chop(PL_e_script, nl);
5223 * c-indentation-style: bsd
5225 * indent-tabs-mode: t
5228 * ex: set ts=8 sts=4 sw=4 noet: