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 = 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) {
1689 STRLEN len = strlen(s);
1690 p = savepvn(s, len);
1691 incpush(p, TRUE, TRUE, FALSE, FALSE);
1692 sv_catpvn(sv, "-I", 2);
1693 sv_catpvn(sv, p, len);
1694 sv_catpvn(sv, " ", 1);
1698 Perl_croak(aTHX_ "No directory specified for -I");
1702 PL_preprocess = TRUE;
1715 PL_preambleav = newAV();
1716 av_push(PL_preambleav,
1717 newSVpv("use Config;",0));
1721 opts_prog = newSVpv("print Config::myconfig(),",0);
1723 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1725 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1727 opts = SvCUR(opts_prog);
1729 sv_catpv(opts_prog,"\" Compile-time options:");
1731 sv_catpv(opts_prog," DEBUGGING");
1733 # ifdef MULTIPLICITY
1734 sv_catpv(opts_prog," MULTIPLICITY");
1736 # ifdef USE_5005THREADS
1737 sv_catpv(opts_prog," USE_5005THREADS");
1739 # ifdef USE_ITHREADS
1740 sv_catpv(opts_prog," USE_ITHREADS");
1742 # ifdef USE_64_BIT_INT
1743 sv_catpv(opts_prog," USE_64_BIT_INT");
1745 # ifdef USE_64_BIT_ALL
1746 sv_catpv(opts_prog," USE_64_BIT_ALL");
1748 # ifdef USE_LONG_DOUBLE
1749 sv_catpv(opts_prog," USE_LONG_DOUBLE");
1751 # ifdef USE_LARGE_FILES
1752 sv_catpv(opts_prog," USE_LARGE_FILES");
1755 sv_catpv(opts_prog," USE_SOCKS");
1757 # ifdef USE_SITECUSTOMIZE
1758 sv_catpv(opts_prog," USE_SITECUSTOMIZE");
1760 # ifdef PERL_IMPLICIT_CONTEXT
1761 sv_catpv(opts_prog," PERL_IMPLICIT_CONTEXT");
1763 # ifdef PERL_IMPLICIT_SYS
1764 sv_catpv(opts_prog," PERL_IMPLICIT_SYS");
1767 while (SvCUR(opts_prog) > opts+76) {
1768 /* find last space after "options: " and before col 76
1772 char *pv = SvPV_nolen(opts_prog);
1773 const char c = pv[opts+76];
1775 space = strrchr(pv+opts+26, ' ');
1777 if (!space) break; /* "Can't happen" */
1779 /* break the line before that space */
1782 sv_insert(opts_prog, opts, 0,
1786 sv_catpv(opts_prog,"\\n\",");
1788 #if defined(LOCAL_PATCH_COUNT)
1789 if (LOCAL_PATCH_COUNT > 0) {
1792 "\" Locally applied patches:\\n\",");
1793 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1794 if (PL_localpatches[i])
1795 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1796 0, PL_localpatches[i], 0);
1800 Perl_sv_catpvf(aTHX_ opts_prog,
1801 "\" Built under %s\\n\"",OSNAME);
1804 Perl_sv_catpvf(aTHX_ opts_prog,
1805 ",\" Compiled at %s %s\\n\"",__DATE__,
1808 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1812 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1813 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1814 "sort grep {/^PERL/} keys %ENV; ");
1817 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1820 "print \" \\%ENV:\\n @env\\n\" if @env;"
1821 "print \" \\@INC:\\n @INC\\n\";");
1825 opts_prog = Perl_newSVpvf(aTHX_
1826 "Config::config_vars(qw%c%s%c)",
1830 av_push(PL_preambleav, opts_prog);
1831 /* don't look for script or read stdin */
1832 scriptname = BIT_BUCKET;
1836 PL_doextract = TRUE;
1844 if (!*++s || isSPACE(*s)) {
1848 /* catch use of gnu style long options */
1849 if (strEQ(s, "version")) {
1853 if (strEQ(s, "help")) {
1860 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1866 #ifndef SECURE_INTERNAL_GETENV
1869 (s = PerlEnv_getenv("PERL5OPT")))
1871 const char *popt = s;
1874 if (*s == '-' && *(s+1) == 'T') {
1875 CHECK_MALLOC_TOO_LATE_FOR('T');
1877 PL_taint_warn = FALSE;
1880 char *popt_copy = Nullch;
1893 if (!strchr("DIMUdmtwA", *s))
1894 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1898 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1899 s = popt_copy + (s - popt);
1900 d = popt_copy + (d - popt);
1907 if( !PL_tainting ) {
1908 PL_taint_warn = TRUE;
1918 #ifdef USE_SITECUSTOMIZE
1921 PL_preambleav = newAV();
1922 av_unshift(PL_preambleav, 1);
1923 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1927 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1928 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1932 scriptname = argv[0];
1935 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1937 else if (scriptname == Nullch) {
1939 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1945 /* Set $^X early so that it can be used for relocatable paths in @INC */
1946 assert (!PL_tainted);
1948 S_set_caret_X(aTHX);
1952 open_script(scriptname,dosearch,sv);
1954 validate_suid(validarg, scriptname);
1957 #if defined(SIGCHLD) || defined(SIGCLD)
1960 # define SIGCHLD SIGCLD
1962 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1963 if (sigstate == SIG_IGN) {
1964 if (ckWARN(WARN_SIGNAL))
1965 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1966 "Can't ignore signal CHLD, forcing to default");
1967 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1973 #ifdef MACOS_TRADITIONAL
1974 if (PL_doextract || gMacPerl_AlwaysExtract) {
1979 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
1980 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1984 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1985 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1986 CvUNIQUE_on(PL_compcv);
1988 CvPADLIST(PL_compcv) = pad_new(0);
1989 #ifdef USE_5005THREADS
1990 CvOWNER(PL_compcv) = 0;
1991 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
1992 MUTEX_INIT(CvMUTEXP(PL_compcv));
1993 #endif /* USE_5005THREADS */
1996 boot_core_UNIVERSAL();
1997 boot_core_xsutils();
2000 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2002 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2008 # ifdef HAS_SOCKS5_INIT
2009 socks5_init(argv[0]);
2015 init_predump_symbols();
2016 /* init_postdump_symbols not currently designed to be called */
2017 /* more than once (ENV isn't cleared first, for example) */
2018 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2020 init_postdump_symbols(argc,argv,env);
2022 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2023 * or explicitly in some platforms.
2024 * locale.c:Perl_init_i18nl10n() if the environment
2025 * look like the user wants to use UTF-8. */
2026 #if defined(SYMBIAN)
2027 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2030 /* Requires init_predump_symbols(). */
2031 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2036 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2037 * and the default open disciplines. */
2038 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2039 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2041 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2042 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2043 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2045 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2046 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2047 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2049 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2050 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2051 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2052 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2053 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2056 sv_setpvn(sv, ":utf8\0:utf8", 11);
2058 sv_setpvn(sv, ":utf8\0", 6);
2061 sv_setpvn(sv, "\0:utf8", 6);
2067 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2068 if (strEQ(s, "unsafe"))
2069 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2070 else if (strEQ(s, "safe"))
2071 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2073 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2078 /* now parse the script */
2080 SETERRNO(0,SS_NORMAL);
2082 #ifdef MACOS_TRADITIONAL
2083 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2085 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2087 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2088 MacPerl_MPWFileName(PL_origfilename));
2092 if (yyparse() || PL_error_count) {
2094 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2096 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2101 CopLINE_set(PL_curcop, 0);
2102 PL_curstash = PL_defstash;
2103 PL_preprocess = FALSE;
2105 SvREFCNT_dec(PL_e_script);
2106 PL_e_script = Nullsv;
2113 SAVECOPFILE(PL_curcop);
2114 SAVECOPLINE(PL_curcop);
2115 gv_check(PL_defstash);
2122 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2123 dump_mstats("after compilation:");
2132 =for apidoc perl_run
2134 Tells a Perl interpreter to run. See L<perlembed>.
2146 PERL_UNUSED_ARG(my_perl);
2148 oldscope = PL_scopestack_ix;
2156 cxstack_ix = -1; /* start context stack again */
2158 case 0: /* normal completion */
2162 case 2: /* my_exit() */
2163 while (PL_scopestack_ix > oldscope)
2166 PL_curstash = PL_defstash;
2167 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2168 PL_endav && !PL_minus_c)
2169 call_list(oldscope, PL_endav);
2171 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2172 dump_mstats("after execution: ");
2174 ret = STATUS_NATIVE_EXPORT;
2178 POPSTACK_TO(PL_mainstack);
2181 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2193 S_run_body(pTHX_ I32 oldscope)
2195 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2196 PL_sawampersand ? "Enabling" : "Omitting"));
2198 if (!PL_restartop) {
2199 DEBUG_x(dump_all());
2201 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2202 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2206 #ifdef MACOS_TRADITIONAL
2207 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2208 (gMacPerl_ErrorFormat ? "# " : ""),
2209 MacPerl_MPWFileName(PL_origfilename));
2211 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2215 if (PERLDB_SINGLE && PL_DBsingle)
2216 sv_setiv(PL_DBsingle, 1);
2218 call_list(oldscope, PL_initav);
2224 PL_op = PL_restartop;
2228 else if (PL_main_start) {
2229 CvDEPTH(PL_main_cv) = 1;
2230 PL_op = PL_main_start;
2238 =head1 SV Manipulation Functions
2240 =for apidoc p||get_sv
2242 Returns the SV of the specified Perl scalar. If C<create> is set and the
2243 Perl variable does not exist then it will be created. If C<create> is not
2244 set and the variable does not exist then NULL is returned.
2250 Perl_get_sv(pTHX_ const char *name, I32 create)
2253 #ifdef USE_5005THREADS
2254 if (name[1] == '\0' && !isALPHA(name[0])) {
2255 PADOFFSET tmp = find_threadsv(name);
2256 if (tmp != NOT_IN_PAD)
2257 return THREADSV(tmp);
2259 #endif /* USE_5005THREADS */
2260 gv = gv_fetchpv(name, create, SVt_PV);
2267 =head1 Array Manipulation Functions
2269 =for apidoc p||get_av
2271 Returns the AV of the specified Perl array. If C<create> is set and the
2272 Perl variable does not exist then it will be created. If C<create> is not
2273 set and the variable does not exist then NULL is returned.
2279 Perl_get_av(pTHX_ const char *name, I32 create)
2281 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2290 =head1 Hash Manipulation Functions
2292 =for apidoc p||get_hv
2294 Returns the HV of the specified Perl hash. If C<create> is set and the
2295 Perl variable does not exist then it will be created. If C<create> is not
2296 set and the variable does not exist then NULL is returned.
2302 Perl_get_hv(pTHX_ const char *name, I32 create)
2304 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2313 =head1 CV Manipulation Functions
2315 =for apidoc p||get_cv
2317 Returns the CV of the specified Perl subroutine. If C<create> is set and
2318 the Perl subroutine does not exist then it will be declared (which has the
2319 same effect as saying C<sub name;>). If C<create> is not set and the
2320 subroutine does not exist then NULL is returned.
2326 Perl_get_cv(pTHX_ const char *name, I32 create)
2328 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2329 /* XXX unsafe for threads if eval_owner isn't held */
2330 /* XXX this is probably not what they think they're getting.
2331 * It has the same effect as "sub name;", i.e. just a forward
2333 if (create && !GvCVu(gv))
2334 return newSUB(start_subparse(FALSE, 0),
2335 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2343 /* Be sure to refetch the stack pointer after calling these routines. */
2347 =head1 Callback Functions
2349 =for apidoc p||call_argv
2351 Performs a callback to the specified Perl sub. See L<perlcall>.
2357 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2359 /* See G_* flags in cop.h */
2360 /* null terminated arg list */
2367 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2372 return call_pv(sub_name, flags);
2376 =for apidoc p||call_pv
2378 Performs a callback to the specified Perl sub. See L<perlcall>.
2384 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2385 /* name of the subroutine */
2386 /* See G_* flags in cop.h */
2388 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2392 =for apidoc p||call_method
2394 Performs a callback to the specified Perl method. The blessed object must
2395 be on the stack. See L<perlcall>.
2401 Perl_call_method(pTHX_ const char *methname, I32 flags)
2402 /* name of the subroutine */
2403 /* See G_* flags in cop.h */
2405 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2408 /* May be called with any of a CV, a GV, or an SV containing the name. */
2410 =for apidoc p||call_sv
2412 Performs a callback to the Perl sub whose name is in the SV. See
2419 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2420 /* See G_* flags in cop.h */
2423 LOGOP myop; /* fake syntax tree node */
2426 volatile I32 retval = 0;
2428 bool oldcatch = CATCH_GET;
2433 if (flags & G_DISCARD) {
2438 Zero(&myop, 1, LOGOP);
2439 myop.op_next = Nullop;
2440 if (!(flags & G_NOARGS))
2441 myop.op_flags |= OPf_STACKED;
2442 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2443 (flags & G_ARRAY) ? OPf_WANT_LIST :
2448 EXTEND(PL_stack_sp, 1);
2449 *++PL_stack_sp = sv;
2451 oldscope = PL_scopestack_ix;
2453 if (PERLDB_SUB && PL_curstash != PL_debstash
2454 /* Handle first BEGIN of -d. */
2455 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2456 /* Try harder, since this may have been a sighandler, thus
2457 * curstash may be meaningless. */
2458 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2459 && !(flags & G_NODEBUG))
2460 PL_op->op_private |= OPpENTERSUB_DB;
2462 if (flags & G_METHOD) {
2463 Zero(&method_op, 1, UNOP);
2464 method_op.op_next = PL_op;
2465 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2466 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2467 PL_op = (OP*)&method_op;
2470 if (!(flags & G_EVAL)) {
2472 call_body((OP*)&myop, FALSE);
2473 retval = PL_stack_sp - (PL_stack_base + oldmark);
2474 CATCH_SET(oldcatch);
2477 myop.op_other = (OP*)&myop;
2479 /* we're trying to emulate pp_entertry() here */
2481 register PERL_CONTEXT *cx;
2482 const I32 gimme = GIMME_V;
2487 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2489 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2491 PL_in_eval = EVAL_INEVAL;
2492 if (flags & G_KEEPERR)
2493 PL_in_eval |= EVAL_KEEPERR;
2495 sv_setpvn(ERRSV,"",0);
2503 call_body((OP*)&myop, FALSE);
2504 retval = PL_stack_sp - (PL_stack_base + oldmark);
2505 if (!(flags & G_KEEPERR))
2506 sv_setpvn(ERRSV,"",0);
2512 /* my_exit() was called */
2513 PL_curstash = PL_defstash;
2516 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2517 Perl_croak(aTHX_ "Callback called exit");
2522 PL_op = PL_restartop;
2526 PL_stack_sp = PL_stack_base + oldmark;
2527 if (flags & G_ARRAY)
2531 *++PL_stack_sp = &PL_sv_undef;
2536 if (PL_scopestack_ix > oldscope) {
2540 register PERL_CONTEXT *cx;
2547 PERL_UNUSED_VAR(newsp);
2548 PERL_UNUSED_VAR(gimme);
2549 PERL_UNUSED_VAR(optype);
2554 if (flags & G_DISCARD) {
2555 PL_stack_sp = PL_stack_base + oldmark;
2565 S_call_body(pTHX_ const OP *myop, bool is_eval)
2567 if (PL_op == myop) {
2569 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2571 PL_op = Perl_pp_entersub(aTHX); /* this does */
2577 /* Eval a string. The G_EVAL flag is always assumed. */
2580 =for apidoc p||eval_sv
2582 Tells Perl to C<eval> the string in the SV.
2588 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2590 /* See G_* flags in cop.h */
2593 UNOP myop; /* fake syntax tree node */
2594 volatile I32 oldmark = SP - PL_stack_base;
2595 volatile I32 retval = 0;
2600 if (flags & G_DISCARD) {
2607 Zero(PL_op, 1, UNOP);
2608 EXTEND(PL_stack_sp, 1);
2609 *++PL_stack_sp = sv;
2611 if (!(flags & G_NOARGS))
2612 myop.op_flags = OPf_STACKED;
2613 myop.op_next = Nullop;
2614 myop.op_type = OP_ENTEREVAL;
2615 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2616 (flags & G_ARRAY) ? OPf_WANT_LIST :
2618 if (flags & G_KEEPERR)
2619 myop.op_flags |= OPf_SPECIAL;
2621 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2622 * before a PUSHEVAL, which corrupts the stack after a croak */
2623 TAINT_PROPER("eval_sv()");
2629 call_body((OP*)&myop,TRUE);
2630 retval = PL_stack_sp - (PL_stack_base + oldmark);
2631 if (!(flags & G_KEEPERR))
2632 sv_setpvn(ERRSV,"",0);
2638 /* my_exit() was called */
2639 PL_curstash = PL_defstash;
2642 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2643 Perl_croak(aTHX_ "Callback called exit");
2648 PL_op = PL_restartop;
2652 PL_stack_sp = PL_stack_base + oldmark;
2653 if (flags & G_ARRAY)
2657 *++PL_stack_sp = &PL_sv_undef;
2663 if (flags & G_DISCARD) {
2664 PL_stack_sp = PL_stack_base + oldmark;
2674 =for apidoc p||eval_pv
2676 Tells Perl to C<eval> the given string and return an SV* result.
2682 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2685 SV* sv = newSVpv(p, 0);
2687 eval_sv(sv, G_SCALAR);
2694 if (croak_on_error && SvTRUE(ERRSV)) {
2695 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2701 /* Require a module. */
2704 =head1 Embedding Functions
2706 =for apidoc p||require_pv
2708 Tells Perl to C<require> the file named by the string argument. It is
2709 analogous to the Perl code C<eval "require '$file'">. It's even
2710 implemented that way; consider using load_module instead.
2715 Perl_require_pv(pTHX_ const char *pv)
2719 PUSHSTACKi(PERLSI_REQUIRE);
2721 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2722 eval_sv(sv_2mortal(sv), G_DISCARD);
2728 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2732 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2733 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2737 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2739 /* This message really ought to be max 23 lines.
2740 * Removed -h because the user already knows that option. Others? */
2742 static const char * const usage_msg[] = {
2743 "-0[octal] specify record separator (\\0, if no argument)",
2744 "-A[mod][=pattern] activate all/given assertions",
2745 "-a autosplit mode with -n or -p (splits $_ into @F)",
2746 "-C[number/list] enables the listed Unicode features",
2747 "-c check syntax only (runs BEGIN and CHECK blocks)",
2748 "-d[:debugger] run program under debugger",
2749 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2750 "-e program one line of program (several -e's allowed, omit programfile)",
2751 "-f don't do $sitelib/sitecustomize.pl at startup",
2752 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2753 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2754 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2755 "-l[octal] enable line ending processing, specifies line terminator",
2756 "-[mM][-]module execute \"use/no module...\" before executing program",
2757 "-n assume \"while (<>) { ... }\" loop around program",
2758 "-p assume loop like -n but print line also, like sed",
2759 "-P run program through C preprocessor before compilation",
2760 "-s enable rudimentary parsing for switches after programfile",
2761 "-S look for programfile using PATH environment variable",
2762 "-t enable tainting warnings",
2763 "-T enable tainting checks",
2764 "-u dump core after parsing program",
2765 "-U allow unsafe operations",
2766 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2767 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2768 "-w enable many useful warnings (RECOMMENDED)",
2769 "-W enable all warnings",
2770 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2771 "-X disable all warnings",
2775 const char * const *p = usage_msg;
2777 PerlIO_printf(PerlIO_stdout(),
2778 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2781 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2784 /* convert a string of -D options (or digits) into an int.
2785 * sets *s to point to the char after the options */
2789 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2791 static const char * const usage_msgd[] = {
2792 " Debugging flag values: (see also -d)",
2793 " p Tokenizing and parsing (with v, displays parse stack)",
2794 " s Stack snapshots (with v, displays all stacks)",
2795 " l Context (loop) stack processing",
2796 " t Trace execution",
2797 " o Method and overloading resolution",
2798 " c String/numeric conversions",
2799 " P Print profiling info, preprocessor command for -P, source file input state",
2800 " m Memory allocation",
2801 " f Format processing",
2802 " r Regular expression parsing and execution",
2803 " x Syntax tree dump",
2804 " u Tainting checks",
2805 " H Hash dump -- usurps values()",
2806 " X Scratchpad allocation",
2808 " S Thread synchronization",
2810 " R Include reference counts of dumped variables (eg when using -Ds)",
2811 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2812 " v Verbose: use in conjunction with other flags",
2814 " A Consistency checks on internal structures",
2815 " q quiet - currently only suppresses the 'EXECUTING' message",
2820 /* if adding extra options, remember to update DEBUG_MASK */
2821 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2823 for (; isALNUM(**s); (*s)++) {
2824 const char *d = strchr(debopts,**s);
2826 i |= 1 << (d - debopts);
2827 else if (ckWARN_d(WARN_DEBUGGING))
2828 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2829 "invalid option -D%c, use -D'' to see choices\n", **s);
2832 else if (isDIGIT(**s)) {
2834 for (; isALNUM(**s); (*s)++) ;
2836 else if (givehelp) {
2837 char **p = (char **)usage_msgd;
2838 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2841 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2842 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2843 "-Dp not implemented on this platform\n");
2849 /* This routine handles any switches that can be given during run */
2852 Perl_moreswitches(pTHX_ char *s)
2863 SvREFCNT_dec(PL_rs);
2864 if (s[1] == 'x' && s[2]) {
2865 const char *e = s+=2;
2871 flags = PERL_SCAN_SILENT_ILLDIGIT;
2872 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2873 if (s + numlen < e) {
2874 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2878 PL_rs = newSVpvn("", 0);
2879 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2880 tmps = (U8*)SvPVX(PL_rs);
2881 uvchr_to_utf8(tmps, rschar);
2882 SvCUR_set(PL_rs, UNISKIP(rschar));
2887 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2888 if (rschar & ~((U8)~0))
2889 PL_rs = &PL_sv_undef;
2890 else if (!rschar && numlen >= 2)
2891 PL_rs = newSVpvn("", 0);
2893 char ch = (char)rschar;
2894 PL_rs = newSVpvn(&ch, 1);
2897 sv_setsv(get_sv("/", TRUE), PL_rs);
2902 PL_unicode = parse_unicode_opts( (const char **)&s );
2907 while (*s && !isSPACE(*s)) ++s;
2909 PL_splitstr = savepv(PL_splitstr);
2923 /* -dt indicates to the debugger that threads will be used */
2924 if (*s == 't' && !isALNUM(s[1])) {
2926 my_setenv("PERL5DB_THREADED", "1");
2929 /* The following permits -d:Mod to accepts arguments following an =
2930 in the fashion that -MSome::Mod does. */
2931 if (*s == ':' || *s == '=') {
2934 sv = newSVpv("use Devel::", 0);
2936 /* We now allow -d:Module=Foo,Bar */
2937 while(isALNUM(*s) || *s==':') ++s;
2939 sv_catpv(sv, start);
2941 sv_catpvn(sv, start, s-start);
2942 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
2945 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2948 PL_perldb = PERLDB_ALL;
2957 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
2958 #else /* !DEBUGGING */
2959 if (ckWARN_d(WARN_DEBUGGING))
2960 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2961 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
2962 for (s++; isALNUM(*s); s++) ;
2967 usage(PL_origargv[0]);
2970 Safefree(PL_inplace);
2971 #if defined(__CYGWIN__) /* do backup extension automagically */
2972 if (*(s+1) == '\0') {
2973 PL_inplace = savepv(".bak");
2976 #endif /* __CYGWIN__ */
2977 PL_inplace = savepv(s+1);
2978 for (s = PL_inplace; *s && !isSPACE(*s); s++)
2982 if (*s == '-') /* Additional switches on #! line. */
2986 case 'I': /* -I handled both here and in parse_body() */
2989 while (*s && isSPACE(*s))
2994 /* ignore trailing spaces (possibly followed by other switches) */
2996 for (e = p; *e && !isSPACE(*e); e++) ;
3000 } while (*p && *p != '-');
3001 e = savepvn(s, e-s);
3002 incpush(e, TRUE, TRUE, FALSE, FALSE);
3009 Perl_croak(aTHX_ "No directory specified for -I");
3015 SvREFCNT_dec(PL_ors_sv);
3021 PL_ors_sv = newSVpvn("\n",1);
3022 numlen = 3 + (*s == '0');
3023 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3027 if (RsPARA(PL_rs)) {
3028 PL_ors_sv = newSVpvn("\n\n",2);
3031 PL_ors_sv = newSVsv(PL_rs);
3038 PL_preambleav = newAV();
3042 SV *sv = newSVpv("use assertions::activate", 24);
3043 while(isALNUM(*s) || *s == ':') ++s;
3045 sv_catpvn(sv, "::", 2);
3046 sv_catpvn(sv, start, s-start);
3049 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3052 else if (*s != '\0') {
3053 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3055 av_push(PL_preambleav, sv);
3059 forbid_setid("-M"); /* XXX ? */
3062 forbid_setid("-m"); /* XXX ? */
3066 const char *use = "use ";
3067 /* -M-foo == 'no foo' */
3068 /* Leading space on " no " is deliberate, to make both
3069 possibilities the same length. */
3070 if (*s == '-') { use = " no "; ++s; }
3071 sv = newSVpvn(use,4);
3073 /* We allow -M'Module qw(Foo Bar)' */
3074 while(isALNUM(*s) || *s==':') ++s;
3076 sv_catpv(sv, start);
3077 if (*(start-1) == 'm') {
3079 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3080 sv_catpv( sv, " ()");
3084 Perl_croak(aTHX_ "Module name required with -%c option",
3086 sv_catpvn(sv, start, s-start);
3087 sv_catpv(sv, " split(/,/,q");
3088 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3090 sv_catpvn(sv, "\0)", 2);
3094 PL_preambleav = newAV();
3095 av_push(PL_preambleav, sv);
3098 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3110 PL_doswitches = TRUE;
3124 #ifdef MACOS_TRADITIONAL
3125 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3127 PL_do_undump = TRUE;
3135 if (!sv_derived_from(PL_patchlevel, "version"))
3136 (void *)upg_version(PL_patchlevel);
3138 PerlIO_printf(PerlIO_stdout(),
3139 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3140 vstringify(PL_patchlevel),
3143 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3144 PerlIO_printf(PerlIO_stdout(),
3145 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3146 vstringify(PL_patchlevel)));
3147 PerlIO_printf(PerlIO_stdout(),
3148 Perl_form(aTHX_ " built under %s at %s %s\n",
3149 OSNAME, __DATE__, __TIME__));
3150 PerlIO_printf(PerlIO_stdout(),
3151 Perl_form(aTHX_ " OS Specific Release: %s\n",
3155 #if defined(LOCAL_PATCH_COUNT)
3156 if (LOCAL_PATCH_COUNT > 0)
3157 PerlIO_printf(PerlIO_stdout(),
3158 "\n(with %d registered patch%s, "
3159 "see perl -V for more detail)",
3160 (int)LOCAL_PATCH_COUNT,
3161 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3164 PerlIO_printf(PerlIO_stdout(),
3165 "\n\nCopyright 1987-2005, Larry Wall\n");
3166 #ifdef MACOS_TRADITIONAL
3167 PerlIO_printf(PerlIO_stdout(),
3168 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3169 "maintained by Chris Nandor\n");
3172 PerlIO_printf(PerlIO_stdout(),
3173 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3176 PerlIO_printf(PerlIO_stdout(),
3177 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3178 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3181 PerlIO_printf(PerlIO_stdout(),
3182 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3183 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3186 PerlIO_printf(PerlIO_stdout(),
3187 "atariST series port, ++jrb bammi@cadence.com\n");
3190 PerlIO_printf(PerlIO_stdout(),
3191 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3194 PerlIO_printf(PerlIO_stdout(),
3195 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3198 PerlIO_printf(PerlIO_stdout(),
3199 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3202 PerlIO_printf(PerlIO_stdout(),
3203 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3206 PerlIO_printf(PerlIO_stdout(),
3207 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3210 PerlIO_printf(PerlIO_stdout(),
3211 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3214 PerlIO_printf(PerlIO_stdout(),
3215 "MiNT port by Guido Flohr, 1997-1999\n");
3218 PerlIO_printf(PerlIO_stdout(),
3219 "EPOC port by Olaf Flebbe, 1999-2002\n");
3222 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3223 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3227 PerlIO_printf(PerlIO_stdout(),
3228 "Symbian port by Nokia, 2004-2005\n");
3230 #ifdef BINARY_BUILD_NOTICE
3231 BINARY_BUILD_NOTICE;
3233 PerlIO_printf(PerlIO_stdout(),
3235 Perl may be copied only under the terms of either the Artistic License or the\n\
3236 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3237 Complete documentation for Perl, including FAQ lists, should be found on\n\
3238 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3239 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3242 if (! (PL_dowarn & G_WARN_ALL_MASK))
3243 PL_dowarn |= G_WARN_ON;
3247 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3248 if (!specialWARN(PL_compiling.cop_warnings))
3249 SvREFCNT_dec(PL_compiling.cop_warnings);
3250 PL_compiling.cop_warnings = pWARN_ALL ;
3254 PL_dowarn = G_WARN_ALL_OFF;
3255 if (!specialWARN(PL_compiling.cop_warnings))
3256 SvREFCNT_dec(PL_compiling.cop_warnings);
3257 PL_compiling.cop_warnings = pWARN_NONE ;
3262 if (s[1] == '-') /* Additional switches on #! line. */
3267 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3273 #ifdef ALTERNATE_SHEBANG
3274 case 'S': /* OS/2 needs -S on "extproc" line. */
3282 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3287 /* compliments of Tom Christiansen */
3289 /* unexec() can be found in the Gnu emacs distribution */
3290 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3293 Perl_my_unexec(pTHX)
3301 prog = newSVpv(BIN_EXP, 0);
3302 sv_catpv(prog, "/perl");
3303 file = newSVpv(PL_origfilename, 0);
3304 sv_catpv(file, ".perldump");
3306 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3307 /* unexec prints msg to stderr in case of failure */
3308 PerlProc_exit(status);
3311 # include <lib$routines.h>
3312 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3314 ABORT(); /* for use with undump */
3319 /* initialize curinterp */
3325 # define PERLVAR(var,type)
3326 # define PERLVARA(var,n,type)
3327 # if defined(PERL_IMPLICIT_CONTEXT)
3328 # if defined(USE_5005THREADS)
3329 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3330 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3331 # else /* !USE_5005THREADS */
3332 # define PERLVARI(var,type,init) aTHX->var = init;
3333 # define PERLVARIC(var,type,init) aTHX->var = init;
3334 # endif /* USE_5005THREADS */
3336 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3337 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3339 # include "intrpvar.h"
3340 # ifndef USE_5005THREADS
3341 # include "thrdvar.h"
3348 # define PERLVAR(var,type)
3349 # define PERLVARA(var,n,type)
3350 # define PERLVARI(var,type,init) PL_##var = init;
3351 # define PERLVARIC(var,type,init) PL_##var = init;
3352 # include "intrpvar.h"
3353 # ifndef USE_5005THREADS
3354 # include "thrdvar.h"
3365 S_init_main_stash(pTHX)
3369 PL_curstash = PL_defstash = newHV();
3370 PL_curstname = newSVpvn("main",4);
3371 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3372 SvREFCNT_dec(GvHV(gv));
3373 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3375 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3376 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3377 GvMULTI_on(PL_incgv);
3378 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3379 GvMULTI_on(PL_hintgv);
3380 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3381 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3382 GvMULTI_on(PL_errgv);
3383 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3384 GvMULTI_on(PL_replgv);
3385 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3386 #ifdef PERL_DONT_CREATE_GVSV
3389 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3390 sv_setpvn(ERRSV, "", 0);
3391 PL_curstash = PL_defstash;
3392 CopSTASH_set(&PL_compiling, PL_defstash);
3393 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3394 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3395 /* We must init $/ before switches are processed. */
3396 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3399 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3401 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3406 const char *cpp_discard_flag;
3415 PL_origfilename = savepvn("-e", 2);
3418 /* if find_script() returns, it returns a malloc()-ed value */
3419 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3421 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3422 const char *s = scriptname + 8;
3423 PL_fdscript = atoi(s);
3428 * Tell apart "normal" usage of fdscript, e.g.
3429 * with bash on FreeBSD:
3430 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3431 * from usage in suidperl.
3432 * Does any "normal" usage leave garbage after the number???
3433 * Is it a mistake to use a similar /dev/fd/ construct for
3438 * Be supersafe and do some sanity-checks.
3439 * Still, can we be sure we got the right thing?
3442 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3445 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3447 scriptname = savepv(s + 1);
3448 Safefree(PL_origfilename);
3449 PL_origfilename = (char *)scriptname;
3454 CopFILE_free(PL_curcop);
3455 CopFILE_set(PL_curcop, PL_origfilename);
3456 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3457 scriptname = (char *)"";
3458 if (PL_fdscript >= 0) {
3459 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3460 # if defined(HAS_FCNTL) && defined(F_SETFD)
3462 /* ensure close-on-exec */
3463 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3468 Perl_croak(aTHX_ "sperl needs fd script\n"
3469 "You should not call sperl directly; do you need to "
3470 "change a #! line\nfrom sperl to perl?\n");
3473 * Do not open (or do other fancy stuff) while setuid.
3474 * Perl does the open, and hands script to suidperl on a fd;
3475 * suidperl only does some checks, sets up UIDs and re-execs
3476 * perl with that fd as it has always done.
3479 if (PL_suidscript != 1) {
3480 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3483 else if (PL_preprocess) {
3484 const char *cpp_cfg = CPPSTDIN;
3485 SV *cpp = newSVpvn("",0);
3486 SV *cmd = NEWSV(0,0);
3488 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3489 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3490 if (strEQ(cpp_cfg, "cppstdin"))
3491 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3492 sv_catpv(cpp, cpp_cfg);
3495 sv_catpvn(sv, "-I", 2);
3496 sv_catpv(sv,PRIVLIB_EXP);
3499 DEBUG_P(PerlIO_printf(Perl_debug_log,
3500 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3501 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3504 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3511 cpp_discard_flag = "";
3513 cpp_discard_flag = "-C";
3517 perl = os2_execname(aTHX);
3519 perl = PL_origargv[0];
3523 /* This strips off Perl comments which might interfere with
3524 the C pre-processor, including #!. #line directives are
3525 deliberately stripped to avoid confusion with Perl's version
3526 of #line. FWP played some golf with it so it will fit
3527 into VMS's 255 character buffer.
3530 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3532 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3534 Perl_sv_setpvf(aTHX_ cmd, "\
3535 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3536 perl, quote, code, quote, scriptname, cpp,
3537 cpp_discard_flag, sv, CPPMINUS);
3539 PL_doextract = FALSE;
3541 DEBUG_P(PerlIO_printf(Perl_debug_log,
3542 "PL_preprocess: cmd=\"%s\"\n",
3545 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3549 else if (!*scriptname) {
3550 forbid_setid("program input from stdin");
3551 PL_rsfp = PerlIO_stdin();
3554 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3555 # if defined(HAS_FCNTL) && defined(F_SETFD)
3557 /* ensure close-on-exec */
3558 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3561 #endif /* IAMSUID */
3563 /* PSz 16 Sep 03 Keep neat error message */
3564 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3565 CopFILE(PL_curcop), Strerror(errno));
3570 * I_SYSSTATVFS HAS_FSTATVFS
3572 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3573 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3574 * here so that metaconfig picks them up. */
3578 S_fd_on_nosuid_fs(pTHX_ int fd)
3581 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3582 * but is needed also on machines without setreuid.
3583 * Seems safe enough to run as root.
3585 int check_okay = 0; /* able to do all the required sys/libcalls */
3586 int on_nosuid = 0; /* the fd is on a nosuid fs */
3588 * Need to check noexec also: nosuid might not be set, the average
3589 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3591 int on_noexec = 0; /* the fd is on a noexec fs */
3594 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3595 * fstatvfs() is UNIX98.
3596 * fstatfs() is 4.3 BSD.
3597 * ustat()+getmnt() is pre-4.3 BSD.
3598 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3599 * an irrelevant filesystem while trying to reach the right one.
3602 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3604 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3605 defined(HAS_FSTATVFS)
3606 # define FD_ON_NOSUID_CHECK_OKAY
3607 struct statvfs stfs;
3609 check_okay = fstatvfs(fd, &stfs) == 0;
3610 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3612 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3613 on platforms where it is present. */
3614 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3616 # endif /* fstatvfs */
3618 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3619 defined(PERL_MOUNT_NOSUID) && \
3620 defined(PERL_MOUNT_NOEXEC) && \
3621 defined(HAS_FSTATFS) && \
3622 defined(HAS_STRUCT_STATFS) && \
3623 defined(HAS_STRUCT_STATFS_F_FLAGS)
3624 # define FD_ON_NOSUID_CHECK_OKAY
3627 check_okay = fstatfs(fd, &stfs) == 0;
3628 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3629 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3630 # endif /* fstatfs */
3632 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3633 defined(PERL_MOUNT_NOSUID) && \
3634 defined(PERL_MOUNT_NOEXEC) && \
3635 defined(HAS_FSTAT) && \
3636 defined(HAS_USTAT) && \
3637 defined(HAS_GETMNT) && \
3638 defined(HAS_STRUCT_FS_DATA) && \
3640 # define FD_ON_NOSUID_CHECK_OKAY
3643 if (fstat(fd, &fdst) == 0) {
3645 if (ustat(fdst.st_dev, &us) == 0) {
3647 /* NOSTAT_ONE here because we're not examining fields which
3648 * vary between that case and STAT_ONE. */
3649 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3650 size_t cmplen = sizeof(us.f_fname);
3651 if (sizeof(fsd.fd_req.path) < cmplen)
3652 cmplen = sizeof(fsd.fd_req.path);
3653 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3654 fdst.st_dev == fsd.fd_req.dev) {
3656 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3657 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3663 # endif /* fstat+ustat+getmnt */
3665 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3666 defined(HAS_GETMNTENT) && \
3667 defined(HAS_HASMNTOPT) && \
3668 defined(MNTOPT_NOSUID) && \
3669 defined(MNTOPT_NOEXEC)
3670 # define FD_ON_NOSUID_CHECK_OKAY
3671 FILE *mtab = fopen("/etc/mtab", "r");
3672 struct mntent *entry;
3675 if (mtab && (fstat(fd, &stb) == 0)) {
3676 while (entry = getmntent(mtab)) {
3677 if (stat(entry->mnt_dir, &fsb) == 0
3678 && fsb.st_dev == stb.st_dev)
3680 /* found the filesystem */
3682 if (hasmntopt(entry, MNTOPT_NOSUID))
3684 if (hasmntopt(entry, MNTOPT_NOEXEC))
3687 } /* A single fs may well fail its stat(). */
3692 # endif /* getmntent+hasmntopt */
3695 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3697 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3699 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3700 return ((!check_okay) || on_nosuid || on_noexec);
3702 #endif /* IAMSUID */
3705 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3710 #endif /* IAMSUID */
3712 /* do we need to emulate setuid on scripts? */
3714 /* This code is for those BSD systems that have setuid #! scripts disabled
3715 * in the kernel because of a security problem. Merely defining DOSUID
3716 * in perl will not fix that problem, but if you have disabled setuid
3717 * scripts in the kernel, this will attempt to emulate setuid and setgid
3718 * on scripts that have those now-otherwise-useless bits set. The setuid
3719 * root version must be called suidperl or sperlN.NNN. If regular perl
3720 * discovers that it has opened a setuid script, it calls suidperl with
3721 * the same argv that it had. If suidperl finds that the script it has
3722 * just opened is NOT setuid root, it sets the effective uid back to the
3723 * uid. We don't just make perl setuid root because that loses the
3724 * effective uid we had before invoking perl, if it was different from the
3727 * Description/comments above do not match current workings:
3728 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3729 * suidperl called with script open and name changed to /dev/fd/N/X;
3730 * suidperl croaks if script is not setuid;
3731 * making perl setuid would be a huge security risk (and yes, that
3732 * would lose any euid we might have had).
3734 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3735 * be defined in suidperl only. suidperl must be setuid root. The
3736 * Configure script will set this up for you if you want it.
3742 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3743 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3744 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3746 const char *linestr;
3749 if (PL_fdscript < 0 || PL_suidscript != 1)
3750 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3752 * Since the script is opened by perl, not suidperl, some of these
3753 * checks are superfluous. Leaving them in probably does not lower
3757 * Do checks even for systems with no HAS_SETREUID.
3758 * We used to swap, then re-swap UIDs with
3760 if (setreuid(PL_euid,PL_uid) < 0
3761 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3762 Perl_croak(aTHX_ "Can't swap uid and euid");
3765 if (setreuid(PL_uid,PL_euid) < 0
3766 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3767 Perl_croak(aTHX_ "Can't reswap uid and euid");
3771 /* On this access check to make sure the directories are readable,
3772 * there is actually a small window that the user could use to make
3773 * filename point to an accessible directory. So there is a faint
3774 * chance that someone could execute a setuid script down in a
3775 * non-accessible directory. I don't know what to do about that.
3776 * But I don't think it's too important. The manual lies when
3777 * it says access() is useful in setuid programs.
3779 * So, access() is pretty useless... but not harmful... do anyway.
3781 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3782 Perl_croak(aTHX_ "Can't access() script\n");
3785 /* If we can swap euid and uid, then we can determine access rights
3786 * with a simple stat of the file, and then compare device and
3787 * inode to make sure we did stat() on the same file we opened.
3788 * Then we just have to make sure he or she can execute it.
3791 * As the script is opened by perl, not suidperl, we do not need to
3792 * care much about access rights.
3794 * The 'script changed' check is needed, or we can get lied to
3795 * about $0 with e.g.
3796 * suidperl /dev/fd/4//bin/x 4<setuidscript
3797 * Without HAS_SETREUID, is it safe to stat() as root?
3799 * Are there any operating systems that pass /dev/fd/xxx for setuid
3800 * scripts, as suggested/described in perlsec(1)? Surely they do not
3801 * pass the script name as we do, so the "script changed" test would
3802 * fail for them... but we never get here with
3803 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3805 * This is one place where we must "lie" about return status: not
3806 * say if the stat() failed. We are doing this as root, and could
3807 * be tricked into reporting existence or not of files that the
3808 * "plain" user cannot even see.
3812 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3813 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3814 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3815 Perl_croak(aTHX_ "Setuid script changed\n");
3819 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3820 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3823 * We used to do this check as the "plain" user (after swapping
3824 * UIDs). But the check for nosuid and noexec filesystem is needed,
3825 * and should be done even without HAS_SETREUID. (Maybe those
3826 * operating systems do not have such mount options anyway...)
3827 * Seems safe enough to do as root.
3829 #if !defined(NO_NOSUID_CHECK)
3830 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3831 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3834 #endif /* IAMSUID */
3836 if (!S_ISREG(PL_statbuf.st_mode)) {
3837 Perl_croak(aTHX_ "Setuid script not plain file\n");
3839 if (PL_statbuf.st_mode & S_IWOTH)
3840 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3841 PL_doswitches = FALSE; /* -s is insecure in suid */
3842 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3843 CopLINE_inc(PL_curcop);
3844 linestr = SvPV_nolen_const(PL_linestr);
3845 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3846 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3847 Perl_croak(aTHX_ "No #! line");
3851 /* Sanity check on line length */
3852 if (strlen(s) < 1 || strlen(s) > 4000)
3853 Perl_croak(aTHX_ "Very long #! line");
3854 /* Allow more than a single space after #! */
3855 while (isSPACE(*s)) s++;
3856 /* Sanity check on buffer end */
3857 while ((*s) && !isSPACE(*s)) s++;
3858 for (s2 = s; (s2 > linestr &&
3859 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3860 || s2[-1] == '-')); s2--) ;
3861 /* Sanity check on buffer start */
3862 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3863 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3864 Perl_croak(aTHX_ "Not a perl script");
3865 while (*s == ' ' || *s == '\t') s++;
3867 * #! arg must be what we saw above. They can invoke it by
3868 * mentioning suidperl explicitly, but they may not add any strange
3869 * arguments beyond what #! says if they do invoke suidperl that way.
3872 * The way validarg was set up, we rely on the kernel to start
3873 * scripts with argv[1] set to contain all #! line switches (the
3877 * Check that we got all the arguments listed in the #! line (not
3878 * just that there are no extraneous arguments). Might not matter
3879 * much, as switches from #! line seem to be acted upon (also), and
3880 * so may be checked and trapped in perl. But, security checks must
3881 * be done in suidperl and not deferred to perl. Note that suidperl
3882 * does not get around to parsing (and checking) the switches on
3883 * the #! line (but execs perl sooner).
3884 * Allow (require) a trailing newline (which may be of two
3885 * characters on some architectures?) (but no other trailing
3888 len = strlen(validarg);
3889 if (strEQ(validarg," PHOOEY ") ||
3890 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3891 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3892 Perl_croak(aTHX_ "Args must match #! line");
3895 if (PL_fdscript < 0 &&
3896 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3897 PL_euid == PL_statbuf.st_uid)
3899 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3900 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3901 #endif /* IAMSUID */
3903 if (PL_fdscript < 0 &&
3904 PL_euid) { /* oops, we're not the setuid root perl */
3906 * When root runs a setuid script, we do not go through the same
3907 * steps of execing sperl and then perl with fd scripts, but
3908 * simply set up UIDs within the same perl invocation; so do
3909 * not have the same checks (on options, whatever) that we have
3910 * for plain users. No problem really: would have to be a script
3911 * that does not actually work for plain users; and if root is
3912 * foolish and can be persuaded to run such an unsafe script, he
3913 * might run also non-setuid ones, and deserves what he gets.
3915 * Or, we might drop the PL_euid check above (and rely just on
3916 * PL_fdscript to avoid loops), and do the execs
3922 * Pass fd script to suidperl.
3923 * Exec suidperl, substituting fd script for scriptname.
3924 * Pass script name as "subdir" of fd, which perl will grok;
3925 * in fact will use that to distinguish this from "normal"
3926 * usage, see comments above.
3928 PerlIO_rewind(PL_rsfp);
3929 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3930 /* PSz 27 Feb 04 Sanity checks on scriptname */
3931 if ((!scriptname) || (!*scriptname) ) {
3932 Perl_croak(aTHX_ "No setuid script name\n");
3934 if (*scriptname == '-') {
3935 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3936 /* Or we might confuse it with an option when replacing
3937 * name in argument list, below (though we do pointer, not
3938 * string, comparisons).
3941 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3942 if (!PL_origargv[which]) {
3943 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3945 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3946 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3947 #if defined(HAS_FCNTL) && defined(F_SETFD)
3948 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3951 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3952 (int)PERL_REVISION, (int)PERL_VERSION,
3953 (int)PERL_SUBVERSION), PL_origargv);
3955 #endif /* IAMSUID */
3956 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
3959 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3961 * This seems back to front: we try HAS_SETEGID first; if not available
3962 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3963 * in the sense that we only want to set EGID; but are there any machines
3964 * with either of the latter, but not the former? Same with UID, later.
3967 (void)setegid(PL_statbuf.st_gid);
3970 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3972 #ifdef HAS_SETRESGID
3973 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3975 PerlProc_setgid(PL_statbuf.st_gid);
3979 if (PerlProc_getegid() != PL_statbuf.st_gid)
3980 Perl_croak(aTHX_ "Can't do setegid!\n");
3982 if (PL_statbuf.st_mode & S_ISUID) {
3983 if (PL_statbuf.st_uid != PL_euid)
3985 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3988 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3990 #ifdef HAS_SETRESUID
3991 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3993 PerlProc_setuid(PL_statbuf.st_uid);
3997 if (PerlProc_geteuid() != PL_statbuf.st_uid)
3998 Perl_croak(aTHX_ "Can't do seteuid!\n");
4000 else if (PL_uid) { /* oops, mustn't run as root */
4002 (void)seteuid((Uid_t)PL_uid);
4005 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4007 #ifdef HAS_SETRESUID
4008 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4010 PerlProc_setuid((Uid_t)PL_uid);
4014 if (PerlProc_geteuid() != PL_uid)
4015 Perl_croak(aTHX_ "Can't do seteuid!\n");
4018 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4019 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4022 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4023 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4024 else if (PL_fdscript < 0 || PL_suidscript != 1)
4025 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4026 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4028 /* PSz 16 Sep 03 Keep neat error message */
4029 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4032 /* We absolutely must clear out any saved ids here, so we */
4033 /* exec the real perl, substituting fd script for scriptname. */
4034 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4036 * It might be thought that using setresgid and/or setresuid (changed to
4037 * set the saved IDs) above might obviate the need to exec, and we could
4038 * go on to "do the perl thing".
4040 * Is there such a thing as "saved GID", and is that set for setuid (but
4041 * not setgid) execution like suidperl? Without exec, it would not be
4042 * cleared for setuid (but not setgid) scripts (or might need a dummy
4045 * We need suidperl to do the exact same argument checking that perl
4046 * does. Thus it cannot be very small; while it could be significantly
4047 * smaller, it is safer (simpler?) to make it essentially the same
4048 * binary as perl (but they are not identical). - Maybe could defer that
4049 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4050 * but prefer to do thorough checks in suidperl itself. Such deferral
4051 * would make suidperl security rely on perl, a design no-no.
4053 * Setuid things should be short and simple, thus easy to understand and
4054 * verify. They should do their "own thing", without influence by
4055 * attackers. It may help if their internal execution flow is fixed,
4056 * regardless of platform: it may be best to exec anyway.
4058 * Suidperl should at least be conceptually simple: a wrapper only,
4059 * never to do any real perl. Maybe we should put
4061 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4063 * into the perly bits.
4065 PerlIO_rewind(PL_rsfp);
4066 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4068 * Keep original arguments: suidperl already has fd script.
4070 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4071 /* if (!PL_origargv[which]) { */
4072 /* errno = EPERM; */
4073 /* Perl_croak(aTHX_ "Permission denied\n"); */
4075 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4076 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4077 #if defined(HAS_FCNTL) && defined(F_SETFD)
4078 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4081 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4082 (int)PERL_REVISION, (int)PERL_VERSION,
4083 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4085 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4086 #endif /* IAMSUID */
4088 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4089 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4090 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4091 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4093 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4096 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4097 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4098 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4099 /* not set-id, must be wrapped */
4107 S_find_beginning(pTHX)
4110 register const char *s2;
4111 #ifdef MACOS_TRADITIONAL
4115 /* skip forward in input to the real script? */
4118 #ifdef MACOS_TRADITIONAL
4119 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4121 while (PL_doextract || gMacPerl_AlwaysExtract) {
4122 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4123 if (!gMacPerl_AlwaysExtract)
4124 Perl_croak(aTHX_ "No Perl script found in input\n");
4126 if (PL_doextract) /* require explicit override ? */
4127 if (!OverrideExtract(PL_origfilename))
4128 Perl_croak(aTHX_ "User aborted script\n");
4130 PL_doextract = FALSE;
4132 /* Pater peccavi, file does not have #! */
4133 PerlIO_rewind(PL_rsfp);
4138 while (PL_doextract) {
4139 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4140 Perl_croak(aTHX_ "No Perl script found in input\n");
4143 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4144 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4145 PL_doextract = FALSE;
4146 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4148 while (*s == ' ' || *s == '\t') s++;
4150 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4151 || s2[-1] == '_') s2--;
4152 if (strnEQ(s2-4,"perl",4))
4153 while ((s = moreswitches(s)))
4156 #ifdef MACOS_TRADITIONAL
4157 /* We are always searching for the #!perl line in MacPerl,
4158 * so if we find it, still keep the line count correct
4159 * by counting lines we already skipped over
4161 for (; maclines > 0 ; maclines--)
4162 PerlIO_ungetc(PL_rsfp, '\n');
4166 /* gMacPerl_AlwaysExtract is false in MPW tool */
4167 } else if (gMacPerl_AlwaysExtract) {
4178 PL_uid = PerlProc_getuid();
4179 PL_euid = PerlProc_geteuid();
4180 PL_gid = PerlProc_getgid();
4181 PL_egid = PerlProc_getegid();
4183 PL_uid |= PL_gid << 16;
4184 PL_euid |= PL_egid << 16;
4186 /* Should not happen: */
4187 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4188 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4191 * Should go by suidscript, not uid!=euid: why disallow
4192 * system("ls") in scripts run from setuid things?
4193 * Or, is this run before we check arguments and set suidscript?
4194 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4195 * (We never have suidscript, can we be sure to have fdscript?)
4196 * Or must then go by UID checks? See comments in forbid_setid also.
4200 /* This is used very early in the lifetime of the program,
4201 * before even the options are parsed, so PL_tainting has
4202 * not been initialized properly. */
4204 Perl_doing_taint(int argc, char *argv[], char *envp[])
4206 #ifndef PERL_IMPLICIT_SYS
4207 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4208 * before we have an interpreter-- and the whole point of this
4209 * function is to be called at such an early stage. If you are on
4210 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4211 * "tainted because running with altered effective ids', you'll
4212 * have to add your own checks somewhere in here. The two most
4213 * known samples of 'implicitness' are Win32 and NetWare, neither
4214 * of which has much of concept of 'uids'. */
4215 int uid = PerlProc_getuid();
4216 int euid = PerlProc_geteuid();
4217 int gid = PerlProc_getgid();
4218 int egid = PerlProc_getegid();
4225 if (uid && (euid != uid || egid != gid))
4227 #endif /* !PERL_IMPLICIT_SYS */
4228 /* This is a really primitive check; environment gets ignored only
4229 * if -T are the first chars together; otherwise one gets
4230 * "Too late" message. */
4231 if ( argc > 1 && argv[1][0] == '-'
4232 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4238 S_forbid_setid(pTHX_ const char *s)
4240 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4241 if (PL_euid != PL_uid)
4242 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4243 if (PL_egid != PL_gid)
4244 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4245 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4247 * Checks for UID/GID above "wrong": why disallow
4248 * perl -e 'print "Hello\n"'
4249 * from within setuid things?? Simply drop them: replaced by
4250 * fdscript/suidscript and #ifdef IAMSUID checks below.
4252 * This may be too late for command-line switches. Will catch those on
4253 * the #! line, after finding the script name and setting up
4254 * fdscript/suidscript. Note that suidperl does not get around to
4255 * parsing (and checking) the switches on the #! line, but checks that
4256 * the two sets are identical.
4258 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4259 * instead, or would that be "too late"? (We never have suidscript, can
4260 * we be sure to have fdscript?)
4262 * Catch things with suidscript (in descendant of suidperl), even with
4263 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4264 * below; but I am paranoid.
4266 * Also see comments about root running a setuid script, elsewhere.
4268 if (PL_suidscript >= 0)
4269 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4271 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4272 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4273 #endif /* IAMSUID */
4277 Perl_init_debugger(pTHX)
4279 HV *ostash = PL_curstash;
4281 PL_curstash = PL_debstash;
4282 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4283 AvREAL_off(PL_dbargs);
4284 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4285 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4286 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4287 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4288 sv_setiv(PL_DBsingle, 0);
4289 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4290 sv_setiv(PL_DBtrace, 0);
4291 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4292 sv_setiv(PL_DBsignal, 0);
4293 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4294 sv_setiv(PL_DBassertion, 0);
4295 PL_curstash = ostash;
4298 #ifndef STRESS_REALLOC
4299 #define REASONABLE(size) (size)
4301 #define REASONABLE(size) (1) /* unreasonable */
4305 Perl_init_stacks(pTHX)
4307 /* start with 128-item stack and 8K cxstack */
4308 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4309 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4310 PL_curstackinfo->si_type = PERLSI_MAIN;
4311 PL_curstack = PL_curstackinfo->si_stack;
4312 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4314 PL_stack_base = AvARRAY(PL_curstack);
4315 PL_stack_sp = PL_stack_base;
4316 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4318 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4321 PL_tmps_max = REASONABLE(128);
4323 Newx(PL_markstack,REASONABLE(32),I32);
4324 PL_markstack_ptr = PL_markstack;
4325 PL_markstack_max = PL_markstack + REASONABLE(32);
4329 Newx(PL_scopestack,REASONABLE(32),I32);
4330 PL_scopestack_ix = 0;
4331 PL_scopestack_max = REASONABLE(32);
4333 Newx(PL_savestack,REASONABLE(128),ANY);
4334 PL_savestack_ix = 0;
4335 PL_savestack_max = REASONABLE(128);
4343 while (PL_curstackinfo->si_next)
4344 PL_curstackinfo = PL_curstackinfo->si_next;
4345 while (PL_curstackinfo) {
4346 PERL_SI *p = PL_curstackinfo->si_prev;
4347 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4348 Safefree(PL_curstackinfo->si_cxstack);
4349 Safefree(PL_curstackinfo);
4350 PL_curstackinfo = p;
4352 Safefree(PL_tmps_stack);
4353 Safefree(PL_markstack);
4354 Safefree(PL_scopestack);
4355 Safefree(PL_savestack);
4364 lex_start(PL_linestr);
4366 PL_subname = newSVpvn("main",4);
4370 S_init_predump_symbols(pTHX)
4375 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4376 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4377 GvMULTI_on(PL_stdingv);
4378 io = GvIOp(PL_stdingv);
4379 IoTYPE(io) = IoTYPE_RDONLY;
4380 IoIFP(io) = PerlIO_stdin();
4381 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4383 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4385 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4388 IoTYPE(io) = IoTYPE_WRONLY;
4389 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4391 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4393 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4395 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4396 GvMULTI_on(PL_stderrgv);
4397 io = GvIOp(PL_stderrgv);
4398 IoTYPE(io) = IoTYPE_WRONLY;
4399 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4400 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4402 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4404 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4406 Safefree(PL_osname);
4407 PL_osname = savepv(OSNAME);
4411 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4414 argc--,argv++; /* skip name of script */
4415 if (PL_doswitches) {
4416 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4419 if (argv[0][1] == '-' && !argv[0][2]) {
4423 if ((s = strchr(argv[0], '='))) {
4425 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4428 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4431 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4432 GvMULTI_on(PL_argvgv);
4433 (void)gv_AVadd(PL_argvgv);
4434 av_clear(GvAVn(PL_argvgv));
4435 for (; argc > 0; argc--,argv++) {
4436 SV *sv = newSVpv(argv[0],0);
4437 av_push(GvAVn(PL_argvgv),sv);
4438 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4439 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4442 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4443 (void)sv_utf8_decode(sv);
4449 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4454 PL_toptarget = NEWSV(0,0);
4455 sv_upgrade(PL_toptarget, SVt_PVFM);
4456 sv_setpvn(PL_toptarget, "", 0);
4457 PL_bodytarget = NEWSV(0,0);
4458 sv_upgrade(PL_bodytarget, SVt_PVFM);
4459 sv_setpvn(PL_bodytarget, "", 0);
4460 PL_formtarget = PL_bodytarget;
4464 init_argv_symbols(argc,argv);
4466 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4467 #ifdef MACOS_TRADITIONAL
4468 /* $0 is not majick on a Mac */
4469 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4471 sv_setpv(GvSV(tmpgv),PL_origfilename);
4472 magicname("0", "0", 1);
4475 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4477 GvMULTI_on(PL_envgv);
4478 hv = GvHVn(PL_envgv);
4479 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4481 #ifdef USE_ENVIRON_ARRAY
4482 /* Note that if the supplied env parameter is actually a copy
4483 of the global environ then it may now point to free'd memory
4484 if the environment has been modified since. To avoid this
4485 problem we treat env==NULL as meaning 'use the default'
4490 # ifdef USE_ITHREADS
4491 && PL_curinterp == aTHX
4495 environ[0] = Nullch;
4498 char** origenv = environ;
4501 for (; *env; env++) {
4502 if (!(s = strchr(*env,'=')) || s == *env)
4504 #if defined(MSDOS) && !defined(DJGPP)
4509 sv = newSVpv(s+1, 0);
4510 (void)hv_store(hv, *env, s - *env, sv, 0);
4513 if (origenv != environ) {
4514 /* realloc has shifted us */
4515 env = (env - origenv) + environ;
4520 #endif /* USE_ENVIRON_ARRAY */
4521 #endif /* !PERL_MICRO */
4524 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4525 SvREADONLY_off(GvSV(tmpgv));
4526 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4527 SvREADONLY_on(GvSV(tmpgv));
4529 #ifdef THREADS_HAVE_PIDS
4530 PL_ppid = (IV)getppid();
4533 /* touch @F array to prevent spurious warnings 20020415 MJD */
4535 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4537 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4538 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4539 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4543 S_init_perllib(pTHX)
4548 s = PerlEnv_getenv("PERL5LIB");
4550 incpush(s, TRUE, TRUE, TRUE, FALSE);
4552 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4554 /* Treat PERL5?LIB as a possible search list logical name -- the
4555 * "natural" VMS idiom for a Unix path string. We allow each
4556 * element to be a set of |-separated directories for compatibility.
4560 if (my_trnlnm("PERL5LIB",buf,0))
4561 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4563 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4567 /* Use the ~-expanded versions of APPLLIB (undocumented),
4568 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4571 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4575 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4577 #ifdef MACOS_TRADITIONAL
4580 SV * privdir = NEWSV(55, 0);
4581 char * macperl = PerlEnv_getenv("MACPERL");
4586 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4587 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4588 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4589 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4590 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4591 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4593 SvREFCNT_dec(privdir);
4596 incpush(":", FALSE, FALSE, TRUE, FALSE);
4599 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4602 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4604 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4608 /* sitearch is always relative to sitelib on Windows for
4609 * DLL-based path intuition to work correctly */
4610 # if !defined(WIN32)
4611 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4617 /* this picks up sitearch as well */
4618 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4620 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4624 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4625 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4628 #ifdef PERL_VENDORARCH_EXP
4629 /* vendorarch is always relative to vendorlib on Windows for
4630 * DLL-based path intuition to work correctly */
4631 # if !defined(WIN32)
4632 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4636 #ifdef PERL_VENDORLIB_EXP
4638 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4640 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4644 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4645 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4648 #ifdef PERL_OTHERLIBDIRS
4649 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4653 incpush(".", FALSE, FALSE, TRUE, FALSE);
4654 #endif /* MACOS_TRADITIONAL */
4657 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4658 # define PERLLIB_SEP ';'
4661 # define PERLLIB_SEP '|'
4663 # if defined(MACOS_TRADITIONAL)
4664 # define PERLLIB_SEP ','
4666 # define PERLLIB_SEP ':'
4670 #ifndef PERLLIB_MANGLE
4671 # define PERLLIB_MANGLE(s,n) (s)
4674 /* Push a directory onto @INC if it exists.
4675 Generate a new SV if we do this, to save needing to copy the SV we push
4678 S_incpush_if_exists(pTHX_ SV *dir)
4681 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4682 S_ISDIR(tmpstatbuf.st_mode)) {
4683 av_push(GvAVn(PL_incgv), dir);
4690 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4693 SV *subdir = Nullsv;
4694 const char *p = dir;
4699 if (addsubdirs || addoldvers) {
4700 subdir = NEWSV(0,0);
4703 /* Break at all separators */
4705 SV *libdir = NEWSV(55,0);
4708 /* skip any consecutive separators */
4710 while ( *p == PERLLIB_SEP ) {
4711 /* Uncomment the next line for PATH semantics */
4712 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4717 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4718 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4723 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4724 p = Nullch; /* break out */
4726 #ifdef MACOS_TRADITIONAL
4727 if (!strchr(SvPVX(libdir), ':')) {
4730 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4732 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4733 sv_catpv(libdir, ":");
4736 /* Do the if() outside the #ifdef to avoid warnings about an unused
4739 #ifdef PERL_RELOCATABLE_INC
4741 * Relocatable include entries are marked with a leading .../
4744 * 0: Remove that leading ".../"
4745 * 1: Remove trailing executable name (anything after the last '/')
4746 * from the perl path to give a perl prefix
4748 * While the @INC element starts "../" and the prefix ends with a real
4749 * directory (ie not . or ..) chop that real directory off the prefix
4750 * and the leading "../" from the @INC element. ie a logical "../"
4752 * Finally concatenate the prefix and the remainder of the @INC element
4753 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4754 * generates /usr/local/lib/perl5
4756 const char *libpath = SvPVX(libdir);
4757 STRLEN libpath_len = SvCUR(libdir);
4758 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4760 SV * const caret_X = get_sv("\030", 0);
4761 /* Going to use the SV just as a scratch buffer holding a C
4767 /* $^X is *the* source of taint if tainting is on, hence
4768 SvPOK() won't be true. */
4770 assert(SvPOKp(caret_X));
4771 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4772 /* Firstly take off the leading .../
4773 If all else fail we'll do the paths relative to the current
4775 sv_chop(libdir, libpath + 4);
4776 /* Don't use SvPV as we're intentionally bypassing taining,
4777 mortal copies that the mg_get of tainting creates, and
4778 corruption that seems to come via the save stack.
4779 I guess that the save stack isn't correctly set up yet. */
4780 libpath = SvPVX(libdir);
4781 libpath_len = SvCUR(libdir);
4783 /* This would work more efficiently with memrchr, but as it's
4784 only a GNU extension we'd need to probe for it and
4785 implement our own. Not hard, but maybe not worth it? */
4787 prefix = SvPVX(prefix_sv);
4788 lastslash = strrchr(prefix, '/');
4790 /* First time in with the *lastslash = '\0' we just wipe off
4791 the trailing /perl from (say) /usr/foo/bin/perl
4795 while ((*lastslash = '\0'), /* Do that, come what may. */
4796 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4797 && (lastslash = strrchr(prefix, '/')))) {
4798 if (lastslash[1] == '\0'
4799 || (lastslash[1] == '.'
4800 && (lastslash[2] == '/' /* ends "/." */
4801 || (lastslash[2] == '/'
4802 && lastslash[3] == '/' /* or "/.." */
4804 /* Prefix ends "/" or "/." or "/..", any of which
4805 are fishy, so don't do any more logical cleanup.
4809 /* Remove leading "../" from path */
4812 /* Next iteration round the loop removes the last
4813 directory name from prefix by writing a '\0' in
4814 the while clause. */
4816 /* prefix has been terminated with a '\0' to the correct
4817 length. libpath points somewhere into the libdir SV.
4818 We need to join the 2 with '/' and drop the result into
4820 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4821 SvREFCNT_dec(libdir);
4822 /* And this is the new libdir. */
4825 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4826 /* Need to taint reloccated paths if running set ID */
4827 SvTAINTED_on(libdir);
4830 SvREFCNT_dec(prefix_sv);
4835 * BEFORE pushing libdir onto @INC we may first push version- and
4836 * archname-specific sub-directories.
4838 if (addsubdirs || addoldvers) {
4839 #ifdef PERL_INC_VERSION_LIST
4840 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4841 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4842 const char **incver;
4848 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4850 while (unix[len-1] == '/') len--; /* Cosmetic */
4851 sv_usepvn(libdir,unix,len);
4854 PerlIO_printf(Perl_error_log,
4855 "Failed to unixify @INC element \"%s\"\n",
4859 #ifdef MACOS_TRADITIONAL
4860 #define PERL_AV_SUFFIX_FMT ""
4861 #define PERL_ARCH_FMT "%s:"
4862 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4864 #define PERL_AV_SUFFIX_FMT "/"
4865 #define PERL_ARCH_FMT "/%s"
4866 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4868 /* .../version/archname if -d .../version/archname */
4869 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4871 (int)PERL_REVISION, (int)PERL_VERSION,
4872 (int)PERL_SUBVERSION, ARCHNAME);
4873 subdir = S_incpush_if_exists(aTHX_ subdir);
4875 /* .../version if -d .../version */
4876 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4877 (int)PERL_REVISION, (int)PERL_VERSION,
4878 (int)PERL_SUBVERSION);
4879 subdir = S_incpush_if_exists(aTHX_ subdir);
4881 /* .../archname if -d .../archname */
4882 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4883 subdir = S_incpush_if_exists(aTHX_ subdir);
4887 #ifdef PERL_INC_VERSION_LIST
4889 for (incver = incverlist; *incver; incver++) {
4890 /* .../xxx if -d .../xxx */
4891 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4892 subdir = S_incpush_if_exists(aTHX_ subdir);
4898 /* finally push this lib directory on the end of @INC */
4899 av_push(GvAVn(PL_incgv), libdir);
4902 assert (SvREFCNT(subdir) == 1);
4903 SvREFCNT_dec(subdir);
4907 #ifdef USE_5005THREADS
4908 STATIC struct perl_thread *
4909 S_init_main_thread(pTHX)
4911 #if !defined(PERL_IMPLICIT_CONTEXT)
4912 struct perl_thread *thr;
4916 Newxz(thr, 1, struct perl_thread);
4917 PL_curcop = &PL_compiling;
4918 thr->interp = PERL_GET_INTERP;
4919 thr->cvcache = newHV();
4920 thr->threadsv = newAV();
4921 /* thr->threadsvp is set when find_threadsv is called */
4922 thr->specific = newAV();
4923 thr->flags = THRf_R_JOINABLE;
4924 MUTEX_INIT(&thr->mutex);
4925 /* Handcraft thrsv similarly to mess_sv */
4926 Newx(PL_thrsv, 1, SV);
4928 SvFLAGS(PL_thrsv) = SVt_PV;
4929 SvANY(PL_thrsv) = (void*)xpv;
4930 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4931 SvPV_set(PL_thrsvr, (char*)thr);
4932 SvCUR_set(PL_thrsv, sizeof(thr));
4933 SvLEN_set(PL_thrsv, sizeof(thr));
4934 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4935 thr->oursv = PL_thrsv;
4936 PL_chopset = " \n-";
4939 MUTEX_LOCK(&PL_threads_mutex);
4945 MUTEX_UNLOCK(&PL_threads_mutex);
4947 #ifdef HAVE_THREAD_INTERN
4948 Perl_init_thread_intern(thr);
4951 #ifdef SET_THREAD_SELF
4952 SET_THREAD_SELF(thr);
4954 thr->self = pthread_self();
4955 #endif /* SET_THREAD_SELF */
4959 * These must come after the thread self setting
4960 * because sv_setpvn does SvTAINT and the taint
4961 * fields thread selfness being set.
4963 PL_toptarget = NEWSV(0,0);
4964 sv_upgrade(PL_toptarget, SVt_PVFM);
4965 sv_setpvn(PL_toptarget, "", 0);
4966 PL_bodytarget = NEWSV(0,0);
4967 sv_upgrade(PL_bodytarget, SVt_PVFM);
4968 sv_setpvn(PL_bodytarget, "", 0);
4969 PL_formtarget = PL_bodytarget;
4970 thr->errsv = newSVpvn("", 0);
4971 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
4974 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
4975 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
4976 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
4977 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
4978 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
4979 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
4981 PL_reginterp_cnt = 0;
4985 #endif /* USE_5005THREADS */
4988 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4992 const line_t oldline = CopLINE(PL_curcop);
4998 while (av_len(paramList) >= 0) {
4999 cv = (CV*)av_shift(paramList);
5001 if (paramList == PL_beginav) {
5002 /* save PL_beginav for compiler */
5003 if (! PL_beginav_save)
5004 PL_beginav_save = newAV();
5005 av_push(PL_beginav_save, (SV*)cv);
5007 else if (paramList == PL_checkav) {
5008 /* save PL_checkav for compiler */
5009 if (! PL_checkav_save)
5010 PL_checkav_save = newAV();
5011 av_push(PL_checkav_save, (SV*)cv);
5021 (void)SvPV_const(atsv, len);
5023 PL_curcop = &PL_compiling;
5024 CopLINE_set(PL_curcop, oldline);
5025 if (paramList == PL_beginav)
5026 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5028 Perl_sv_catpvf(aTHX_ atsv,
5029 "%s failed--call queue aborted",
5030 paramList == PL_checkav ? "CHECK"
5031 : paramList == PL_initav ? "INIT"
5033 while (PL_scopestack_ix > oldscope)
5036 Perl_croak(aTHX_ "%"SVf"", atsv);
5043 /* my_exit() was called */
5044 while (PL_scopestack_ix > oldscope)
5047 PL_curstash = PL_defstash;
5048 PL_curcop = &PL_compiling;
5049 CopLINE_set(PL_curcop, oldline);
5051 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5052 if (paramList == PL_beginav)
5053 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5055 Perl_croak(aTHX_ "%s failed--call queue aborted",
5056 paramList == PL_checkav ? "CHECK"
5057 : paramList == PL_initav ? "INIT"
5064 PL_curcop = &PL_compiling;
5065 CopLINE_set(PL_curcop, oldline);
5068 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5077 S_call_list_body(pTHX_ CV *cv)
5079 PUSHMARK(PL_stack_sp);
5080 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5085 Perl_my_exit(pTHX_ U32 status)
5087 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5088 thr, (unsigned long) status));
5097 STATUS_NATIVE_SET(status);
5104 Perl_my_failure_exit(pTHX)
5107 if (vaxc$errno & 1) {
5108 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5109 STATUS_NATIVE_SET(44);
5112 if (!vaxc$errno) /* unlikely */
5113 STATUS_NATIVE_SET(44);
5115 STATUS_NATIVE_SET(vaxc$errno);
5120 STATUS_UNIX_SET(errno);
5122 exitstatus = STATUS_UNIX >> 8;
5123 if (exitstatus & 255)
5124 STATUS_UNIX_SET(exitstatus);
5126 STATUS_UNIX_SET(255);
5133 S_my_exit_jump(pTHX)
5136 register PERL_CONTEXT *cx;
5141 SvREFCNT_dec(PL_e_script);
5142 PL_e_script = Nullsv;
5145 POPSTACK_TO(PL_mainstack);
5146 if (cxstack_ix >= 0) {
5149 POPBLOCK(cx,PL_curpm);
5154 PERL_UNUSED_VAR(gimme);
5155 PERL_UNUSED_VAR(newsp);
5159 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5161 const char * const p = SvPVX_const(PL_e_script);
5162 const char *nl = strchr(p, '\n');
5164 PERL_UNUSED_ARG(idx);
5165 PERL_UNUSED_ARG(maxlen);
5167 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5169 filter_del(read_e_script);
5172 sv_catpvn(buf_sv, p, nl-p);
5173 sv_chop(PL_e_script, nl);
5179 * c-indentation-style: bsd
5181 * indent-tabs-mode: t
5184 * ex: set ts=8 sts=4 sw=4 noet: