3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
141 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
155 PERL_SET_THX(my_perl);
159 #ifdef PERL_IMPLICIT_SYS
161 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
162 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
163 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
164 struct IPerlDir* ipD, struct IPerlSock* ipS,
165 struct IPerlProc* ipP)
167 PerlInterpreter *my_perl;
168 /* Newx() needs interpreter, so call malloc() instead */
169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
170 S_init_tls_and_interp(my_perl);
171 Zero(my_perl, 1, PerlInterpreter);
187 =head1 Embedding Functions
189 =for apidoc perl_alloc
191 Allocates a new Perl interpreter. See L<perlembed>.
199 PerlInterpreter *my_perl;
201 /* Newx() needs interpreter, so call malloc() instead */
202 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
204 S_init_tls_and_interp(my_perl);
205 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
207 #endif /* PERL_IMPLICIT_SYS */
210 =for apidoc perl_construct
212 Initializes a new Perl interpreter. See L<perlembed>.
218 perl_construct(pTHXx)
221 PERL_UNUSED_ARG(my_perl);
224 PL_perl_destruct_level = 1;
226 if (PL_perl_destruct_level > 0)
229 /* Init the real globals (and main thread)? */
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
233 PL_linestr = NEWSV(65,79);
234 sv_upgrade(PL_linestr,SVt_PVIV);
236 if (!SvREADONLY(&PL_sv_undef)) {
237 /* set read-only and try to insure than we wont see REFCNT==0
240 SvREADONLY_on(&PL_sv_undef);
241 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
243 sv_setpv(&PL_sv_no,PL_No);
244 /* value lookup in void context - happens to have the side effect
245 of caching the numeric forms. */
248 SvREADONLY_on(&PL_sv_no);
249 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_yes,PL_Yes);
254 SvREADONLY_on(&PL_sv_yes);
255 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
257 SvREADONLY_on(&PL_sv_placeholder);
258 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
261 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
262 PL_pidstatus = newHV();
265 PL_rs = newSVpvn("\n", 1);
270 PL_lex_state = LEX_NOTPARSING;
276 SET_NUMERIC_STANDARD();
278 #if defined(LOCAL_PATCH_COUNT)
279 PL_localpatches = local_patches; /* For possible -v */
282 #ifdef HAVE_INTERP_INTERN
286 PerlIO_init(aTHX); /* Hook to IO system */
288 PL_fdpid = newAV(); /* for remembering popen pids by fd */
289 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
290 PL_errors = newSVpvn("",0);
291 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
292 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
293 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
295 PL_regex_padav = newAV();
296 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
297 PL_regex_pad = AvARRAY(PL_regex_padav);
299 #ifdef USE_REENTRANT_API
300 Perl_reentrant_init(aTHX);
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
311 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
317 # ifdef USE_ENVIRON_ARRAY
318 PL_origenviron = environ;
322 /* Use sysconf(_SC_CLK_TCK) if available, if not
323 * available or if the sysconf() fails, use the HZ.
324 * BeOS has those, but returns the wrong value.
325 * The HZ if not originally defined has been by now
326 * been defined as CLK_TCK, if available. */
327 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
328 PL_clocktick = sysconf(_SC_CLK_TCK);
329 if (PL_clocktick <= 0)
333 PL_stashcache = newHV();
335 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
336 (int)PERL_VERSION, (int)PERL_SUBVERSION);
339 if (!PL_mmap_page_size) {
340 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
342 SETERRNO(0, SS_NORMAL);
344 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
346 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
348 if ((long) PL_mmap_page_size < 0) {
350 SV * const error = ERRSV;
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 */
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.
742 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
743 PL_defoutgv = Nullgv; /* may have been freed */
746 /* unhook hooks which will soon be, or use, destroyed data */
747 SvREFCNT_dec(PL_warnhook);
748 PL_warnhook = Nullsv;
749 SvREFCNT_dec(PL_diehook);
752 /* call exit list functions */
753 while (PL_exitlistlen-- > 0)
754 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
756 Safefree(PL_exitlist);
761 if (destruct_level == 0){
763 DEBUG_P(debprofdump());
765 #if defined(PERLIO_LAYERS)
766 /* No more IO - including error messages ! */
767 PerlIO_cleanup(aTHX);
770 /* The exit() function will do everything that needs doing. */
774 /* jettison our possibly duplicated environment */
775 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
776 * so we certainly shouldn't free it here
779 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
780 if (environ != PL_origenviron && !PL_use_safe_putenv
782 /* only main thread can free environ[0] contents */
783 && PL_curinterp == aTHX
789 for (i = 0; environ[i]; i++)
790 safesysfree(environ[i]);
792 /* Must use safesysfree() when working with environ. */
793 safesysfree(environ);
795 environ = PL_origenviron;
798 #endif /* !PERL_MICRO */
800 /* reset so print() ends up where we expect */
804 /* the syntax tree is shared between clones
805 * so op_free(PL_main_root) only ReREFCNT_dec's
806 * REGEXPs in the parent interpreter
807 * we need to manually ReREFCNT_dec for the clones
810 I32 i = AvFILLp(PL_regex_padav) + 1;
811 SV **ary = AvARRAY(PL_regex_padav);
816 if (SvFLAGS(resv) & SVf_BREAK) {
817 /* this is PL_reg_curpm, already freed
818 * flag is set in regexec.c:S_regtry
820 SvFLAGS(resv) &= ~SVf_BREAK;
822 else if(SvREPADTMP(resv)) {
823 SvREPADTMP_off(resv);
825 else if(SvIOKp(resv)) {
826 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
831 SvREFCNT_dec(PL_regex_padav);
832 PL_regex_padav = Nullav;
836 SvREFCNT_dec((SV*) PL_stashcache);
837 PL_stashcache = NULL;
839 /* loosen bonds of global variables */
842 (void)PerlIO_close(PL_rsfp);
846 /* Filters for program text */
847 SvREFCNT_dec(PL_rsfp_filters);
848 PL_rsfp_filters = Nullav;
851 PL_preprocess = FALSE;
857 PL_doswitches = FALSE;
858 PL_dowarn = G_WARN_OFF;
859 PL_doextract = FALSE;
860 PL_sawampersand = FALSE; /* must save all match strings */
863 Safefree(PL_inplace);
865 SvREFCNT_dec(PL_patchlevel);
868 SvREFCNT_dec(PL_e_script);
869 PL_e_script = Nullsv;
874 /* magical thingies */
876 SvREFCNT_dec(PL_ofs_sv); /* $, */
879 SvREFCNT_dec(PL_ors_sv); /* $\ */
882 SvREFCNT_dec(PL_rs); /* $/ */
885 PL_multiline = 0; /* $* */
886 Safefree(PL_osname); /* $^O */
889 SvREFCNT_dec(PL_statname);
890 PL_statname = Nullsv;
893 /* defgv, aka *_ should be taken care of elsewhere */
895 /* clean up after study() */
896 SvREFCNT_dec(PL_lastscream);
897 PL_lastscream = Nullsv;
898 Safefree(PL_screamfirst);
900 Safefree(PL_screamnext);
904 Safefree(PL_efloatbuf);
905 PL_efloatbuf = Nullch;
908 /* startup and shutdown function lists */
909 SvREFCNT_dec(PL_beginav);
910 SvREFCNT_dec(PL_beginav_save);
911 SvREFCNT_dec(PL_endav);
912 SvREFCNT_dec(PL_checkav);
913 SvREFCNT_dec(PL_checkav_save);
914 SvREFCNT_dec(PL_initav);
916 PL_beginav_save = Nullav;
919 PL_checkav_save = Nullav;
922 /* shortcuts just get cleared */
928 PL_argvoutgv = Nullgv;
930 PL_stderrgv = Nullgv;
931 PL_last_in_gv = Nullgv;
936 PL_DBsingle = Nullsv;
938 PL_DBsignal = Nullsv;
939 PL_DBassertion = Nullsv;
942 PL_debstash = Nullhv;
944 SvREFCNT_dec(PL_argvout_stack);
945 PL_argvout_stack = Nullav;
947 SvREFCNT_dec(PL_modglobal);
948 PL_modglobal = Nullhv;
949 SvREFCNT_dec(PL_preambleav);
950 PL_preambleav = Nullav;
951 SvREFCNT_dec(PL_subname);
953 SvREFCNT_dec(PL_linestr);
955 SvREFCNT_dec(PL_pidstatus);
956 PL_pidstatus = Nullhv;
957 SvREFCNT_dec(PL_toptarget);
958 PL_toptarget = Nullsv;
959 SvREFCNT_dec(PL_bodytarget);
960 PL_bodytarget = Nullsv;
961 PL_formtarget = Nullsv;
963 /* free locale stuff */
964 #ifdef USE_LOCALE_COLLATE
965 Safefree(PL_collation_name);
966 PL_collation_name = Nullch;
969 #ifdef USE_LOCALE_NUMERIC
970 Safefree(PL_numeric_name);
971 PL_numeric_name = Nullch;
972 SvREFCNT_dec(PL_numeric_radix_sv);
973 PL_numeric_radix_sv = Nullsv;
976 /* clear utf8 character classes */
977 SvREFCNT_dec(PL_utf8_alnum);
978 SvREFCNT_dec(PL_utf8_alnumc);
979 SvREFCNT_dec(PL_utf8_ascii);
980 SvREFCNT_dec(PL_utf8_alpha);
981 SvREFCNT_dec(PL_utf8_space);
982 SvREFCNT_dec(PL_utf8_cntrl);
983 SvREFCNT_dec(PL_utf8_graph);
984 SvREFCNT_dec(PL_utf8_digit);
985 SvREFCNT_dec(PL_utf8_upper);
986 SvREFCNT_dec(PL_utf8_lower);
987 SvREFCNT_dec(PL_utf8_print);
988 SvREFCNT_dec(PL_utf8_punct);
989 SvREFCNT_dec(PL_utf8_xdigit);
990 SvREFCNT_dec(PL_utf8_mark);
991 SvREFCNT_dec(PL_utf8_toupper);
992 SvREFCNT_dec(PL_utf8_totitle);
993 SvREFCNT_dec(PL_utf8_tolower);
994 SvREFCNT_dec(PL_utf8_tofold);
995 SvREFCNT_dec(PL_utf8_idstart);
996 SvREFCNT_dec(PL_utf8_idcont);
997 PL_utf8_alnum = Nullsv;
998 PL_utf8_alnumc = Nullsv;
999 PL_utf8_ascii = Nullsv;
1000 PL_utf8_alpha = Nullsv;
1001 PL_utf8_space = Nullsv;
1002 PL_utf8_cntrl = Nullsv;
1003 PL_utf8_graph = Nullsv;
1004 PL_utf8_digit = Nullsv;
1005 PL_utf8_upper = Nullsv;
1006 PL_utf8_lower = Nullsv;
1007 PL_utf8_print = Nullsv;
1008 PL_utf8_punct = Nullsv;
1009 PL_utf8_xdigit = Nullsv;
1010 PL_utf8_mark = Nullsv;
1011 PL_utf8_toupper = Nullsv;
1012 PL_utf8_totitle = Nullsv;
1013 PL_utf8_tolower = Nullsv;
1014 PL_utf8_tofold = Nullsv;
1015 PL_utf8_idstart = Nullsv;
1016 PL_utf8_idcont = Nullsv;
1018 if (!specialWARN(PL_compiling.cop_warnings))
1019 SvREFCNT_dec(PL_compiling.cop_warnings);
1020 PL_compiling.cop_warnings = Nullsv;
1021 if (!specialCopIO(PL_compiling.cop_io))
1022 SvREFCNT_dec(PL_compiling.cop_io);
1023 PL_compiling.cop_io = Nullsv;
1024 CopFILE_free(&PL_compiling);
1025 CopSTASH_free(&PL_compiling);
1027 /* Prepare to destruct main symbol table. */
1032 SvREFCNT_dec(PL_curstname);
1033 PL_curstname = Nullsv;
1035 /* clear queued errors */
1036 SvREFCNT_dec(PL_errors);
1040 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1041 if (PL_scopestack_ix != 0)
1042 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1043 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1044 (long)PL_scopestack_ix);
1045 if (PL_savestack_ix != 0)
1046 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1047 "Unbalanced saves: %ld more saves than restores\n",
1048 (long)PL_savestack_ix);
1049 if (PL_tmps_floor != -1)
1050 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1051 (long)PL_tmps_floor + 1);
1052 if (cxstack_ix != -1)
1053 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1054 (long)cxstack_ix + 1);
1057 /* Now absolutely destruct everything, somehow or other, loops or no. */
1058 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1059 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1061 /* the 2 is for PL_fdpid and PL_strtab */
1062 while (PL_sv_count > 2 && sv_clean_all())
1065 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1066 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1067 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1068 SvFLAGS(PL_strtab) |= SVt_PVHV;
1070 AvREAL_off(PL_fdpid); /* no surviving entries */
1071 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1074 #ifdef HAVE_INTERP_INTERN
1078 /* Destruct the global string table. */
1080 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1081 * so that sv_free() won't fail on them.
1082 * Now that the global string table is using a single hunk of memory
1083 * for both HE and HEK, we either need to explicitly unshare it the
1084 * correct way, or actually free things here.
1087 const I32 max = HvMAX(PL_strtab);
1088 HE ** const array = HvARRAY(PL_strtab);
1089 HE *hent = array[0];
1092 if (hent && ckWARN_d(WARN_INTERNAL)) {
1093 HE * const next = HeNEXT(hent);
1094 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1095 "Unbalanced string table refcount: (%ld) for \"%s\"",
1096 (long)(HeVAL(hent) - Nullsv), HeKEY(hent));
1103 hent = array[riter];
1108 HvARRAY(PL_strtab) = 0;
1109 HvTOTALKEYS(PL_strtab) = 0;
1110 HvFILL(PL_strtab) = 0;
1112 SvREFCNT_dec(PL_strtab);
1115 /* free the pointer tables used for cloning */
1116 ptr_table_free(PL_ptr_table);
1117 PL_ptr_table = (PTR_TBL_t*)NULL;
1120 /* free special SVs */
1122 SvREFCNT(&PL_sv_yes) = 0;
1123 sv_clear(&PL_sv_yes);
1124 SvANY(&PL_sv_yes) = NULL;
1125 SvFLAGS(&PL_sv_yes) = 0;
1127 SvREFCNT(&PL_sv_no) = 0;
1128 sv_clear(&PL_sv_no);
1129 SvANY(&PL_sv_no) = NULL;
1130 SvFLAGS(&PL_sv_no) = 0;
1134 for (i=0; i<=2; i++) {
1135 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1136 sv_clear(PERL_DEBUG_PAD(i));
1137 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1138 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1142 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1143 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1145 #ifdef DEBUG_LEAKING_SCALARS
1146 if (PL_sv_count != 0) {
1151 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1152 svend = &sva[SvREFCNT(sva)];
1153 for (sv = sva + 1; sv < svend; ++sv) {
1154 if (SvTYPE(sv) != SVTYPEMASK) {
1155 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1157 " refcnt=%"UVuf pTHX__FORMAT "\n"
1158 "\tallocated at %s:%d %s %s%s\n",
1159 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1160 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1162 sv->sv_debug_inpad ? "for" : "by",
1163 sv->sv_debug_optype ?
1164 PL_op_name[sv->sv_debug_optype]: "(none)",
1165 sv->sv_debug_cloned ? " (cloned)" : ""
1167 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1168 Perl_dump_sv_child(aTHX_ sv);
1174 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1178 /* Wait for up to 4 seconds for child to terminate.
1179 This seems to be the least effort way of timing out on reaping
1181 struct timeval waitfor = {4, 0};
1182 int sock = PL_dumper_fd;
1186 FD_SET(sock, &rset);
1187 select(sock + 1, &rset, NULL, NULL, &waitfor);
1188 waitpid(child, &status, WNOHANG);
1196 #if defined(PERLIO_LAYERS)
1197 /* No more IO - including error messages ! */
1198 PerlIO_cleanup(aTHX);
1201 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1202 as currently layers use it rather than Nullsv as a marker
1203 for no arg - and will try and SvREFCNT_dec it.
1205 SvREFCNT(&PL_sv_undef) = 0;
1206 SvREADONLY_off(&PL_sv_undef);
1208 Safefree(PL_origfilename);
1209 PL_origfilename = Nullch;
1210 Safefree(PL_reg_start_tmp);
1211 PL_reg_start_tmp = (char**)NULL;
1212 PL_reg_start_tmpl = 0;
1213 Safefree(PL_reg_curpm);
1214 Safefree(PL_reg_poscache);
1215 free_tied_hv_pool();
1216 Safefree(PL_op_mask);
1217 Safefree(PL_psig_ptr);
1218 PL_psig_ptr = (SV**)NULL;
1219 Safefree(PL_psig_name);
1220 PL_psig_name = (SV**)NULL;
1221 Safefree(PL_bitcount);
1222 PL_bitcount = Nullch;
1223 Safefree(PL_psig_pend);
1224 PL_psig_pend = (int*)NULL;
1225 PL_formfeed = Nullsv;
1227 PL_tainting = FALSE;
1228 PL_taint_warn = FALSE;
1229 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1232 DEBUG_P(debprofdump());
1234 #ifdef USE_REENTRANT_API
1235 Perl_reentrant_free(aTHX);
1240 /* As the absolutely last thing, free the non-arena SV for mess() */
1243 /* we know that type == SVt_PVMG */
1245 /* it could have accumulated taint magic */
1248 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1249 moremagic = mg->mg_moremagic;
1250 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1252 Safefree(mg->mg_ptr);
1256 /* we know that type >= SVt_PV */
1257 SvPV_free(PL_mess_sv);
1258 Safefree(SvANY(PL_mess_sv));
1259 Safefree(PL_mess_sv);
1260 PL_mess_sv = Nullsv;
1266 =for apidoc perl_free
1268 Releases a Perl interpreter. See L<perlembed>.
1276 #if defined(WIN32) || defined(NETWARE)
1277 # if defined(PERL_IMPLICIT_SYS)
1279 void *host = nw_internal_host;
1281 void *host = w32_internal_host;
1283 PerlMem_free(aTHXx);
1285 nw_delete_internal_host(host);
1287 win32_delete_internal_host(host);
1290 PerlMem_free(aTHXx);
1293 PerlMem_free(aTHXx);
1297 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1298 /* provide destructors to clean up the thread key when libperl is unloaded */
1299 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1301 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1302 #pragma fini "perl_fini"
1306 #if defined(__GNUC__)
1307 __attribute__((destructor))
1317 #endif /* THREADS */
1320 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1322 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1323 PL_exitlist[PL_exitlistlen].fn = fn;
1324 PL_exitlist[PL_exitlistlen].ptr = ptr;
1328 #ifdef HAS_PROCSELFEXE
1329 /* This is a function so that we don't hold on to MAXPATHLEN
1330 bytes of stack longer than necessary
1333 S_procself_val(pTHX_ SV *sv, const char *arg0)
1335 char buf[MAXPATHLEN];
1336 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1338 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1339 includes a spurious NUL which will cause $^X to fail in system
1340 or backticks (this will prevent extensions from being built and
1341 many tests from working). readlink is not meant to add a NUL.
1342 Normal readlink works fine.
1344 if (len > 0 && buf[len-1] == '\0') {
1348 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1349 returning the text "unknown" from the readlink rather than the path
1350 to the executable (or returning an error from the readlink). Any valid
1351 path has a '/' in it somewhere, so use that to validate the result.
1352 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1354 if (len > 0 && memchr(buf, '/', len)) {
1355 sv_setpvn(sv,buf,len);
1361 #endif /* HAS_PROCSELFEXE */
1364 S_set_caret_X(pTHX) {
1365 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1367 #ifdef HAS_PROCSELFEXE
1368 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1371 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1373 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1380 =for apidoc perl_parse
1382 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1388 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1395 PERL_UNUSED_VAR(my_perl);
1397 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1400 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1401 setuid perl scripts securely.\n");
1402 #endif /* IAMSUID */
1405 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1406 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1407 * This MUST be done before any hash stores or fetches take place.
1408 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1409 * yourself, it is your responsibility to provide a good random seed!
1410 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1411 if (!PL_rehash_seed_set)
1412 PL_rehash_seed = get_hash_seed();
1414 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1416 if (s && (atoi(s) == 1))
1417 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1419 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1425 /* Set PL_origalen be the sum of the contiguous argv[]
1426 * elements plus the size of the env in case that it is
1427 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1428 * as the maximum modifiable length of $0. In the worst case
1429 * the area we are able to modify is limited to the size of
1430 * the original argv[0]. (See below for 'contiguous', though.)
1432 const char *s = NULL;
1435 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1436 /* Do the mask check only if the args seem like aligned. */
1438 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1440 /* See if all the arguments are contiguous in memory. Note
1441 * that 'contiguous' is a loose term because some platforms
1442 * align the argv[] and the envp[]. If the arguments look
1443 * like non-aligned, assume that they are 'strictly' or
1444 * 'traditionally' contiguous. If the arguments look like
1445 * aligned, we just check that they are within aligned
1446 * PTRSIZE bytes. As long as no system has something bizarre
1447 * like the argv[] interleaved with some other data, we are
1448 * fine. (Did I just evoke Murphy's Law?) --jhi */
1449 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1451 for (i = 1; i < PL_origargc; i++) {
1452 if ((PL_origargv[i] == s + 1
1454 || PL_origargv[i] == s + 2
1459 (PL_origargv[i] > s &&
1461 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1471 /* Can we grab env area too to be used as the area for $0? */
1472 if (PL_origenviron) {
1473 if ((PL_origenviron[0] == s + 1
1475 || (PL_origenviron[0] == s + 9 && (s += 8))
1480 (PL_origenviron[0] > s &&
1481 PL_origenviron[0] <=
1482 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1486 s = PL_origenviron[0];
1489 my_setenv("NoNe SuCh", Nullch);
1490 /* Force copy of environment. */
1491 for (i = 1; PL_origenviron[i]; i++) {
1492 if (PL_origenviron[i] == s + 1
1495 (PL_origenviron[i] > s &&
1496 PL_origenviron[i] <=
1497 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1500 s = PL_origenviron[i];
1508 PL_origalen = s - PL_origargv[0] + 1;
1513 /* Come here if running an undumped a.out. */
1515 PL_origfilename = savepv(argv[0]);
1516 PL_do_undump = FALSE;
1517 cxstack_ix = -1; /* start label stack again */
1519 assert (!PL_tainted);
1521 S_set_caret_X(aTHX);
1523 init_postdump_symbols(argc,argv,env);
1528 op_free(PL_main_root);
1529 PL_main_root = Nullop;
1531 PL_main_start = Nullop;
1532 SvREFCNT_dec(PL_main_cv);
1533 PL_main_cv = Nullcv;
1536 oldscope = PL_scopestack_ix;
1537 PL_dowarn = G_WARN_OFF;
1542 parse_body(env,xsinit);
1544 call_list(oldscope, PL_checkav);
1551 /* my_exit() was called */
1552 while (PL_scopestack_ix > oldscope)
1555 PL_curstash = PL_defstash;
1557 call_list(oldscope, PL_checkav);
1561 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1570 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1573 int argc = PL_origargc;
1574 char **argv = PL_origargv;
1575 const char *scriptname = NULL;
1576 VOL bool dosearch = FALSE;
1577 const char *validarg = "";
1580 const char *cddir = Nullch;
1581 #ifdef USE_SITECUSTOMIZE
1582 bool minus_f = FALSE;
1587 sv_setpvn(PL_linestr,"",0);
1588 sv = newSVpvn("",0); /* first used for -I flags */
1592 for (argc--,argv++; argc > 0; argc--,argv++) {
1593 if (argv[0][0] != '-' || !argv[0][1])
1597 validarg = " PHOOEY ";
1601 * Can we rely on the kernel to start scripts with argv[1] set to
1602 * contain all #! line switches (the whole line)? (argv[0] is set to
1603 * the interpreter name, argv[2] to the script name; argv[3] and
1604 * above may contain other arguments.)
1611 #ifndef PERL_STRICT_CR
1636 if ((s = moreswitches(s)))
1641 CHECK_MALLOC_TOO_LATE_FOR('t');
1642 if( !PL_tainting ) {
1643 PL_taint_warn = TRUE;
1649 CHECK_MALLOC_TOO_LATE_FOR('T');
1651 PL_taint_warn = FALSE;
1656 #ifdef MACOS_TRADITIONAL
1657 /* ignore -e for Dev:Pseudo argument */
1658 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1663 PL_e_script = newSVpvn("",0);
1664 filter_add(read_e_script, NULL);
1667 sv_catpv(PL_e_script, s);
1669 sv_catpv(PL_e_script, argv[1]);
1673 Perl_croak(aTHX_ "No code specified for -e");
1674 sv_catpv(PL_e_script, "\n");
1678 #ifdef USE_SITECUSTOMIZE
1684 case 'I': /* -I handled both here and in moreswitches() */
1686 if (!*++s && (s=argv[1]) != Nullch) {
1690 STRLEN len = strlen(s);
1691 const char * const p = savepvn(s, len);
1692 incpush(p, TRUE, TRUE, FALSE, FALSE);
1693 sv_catpvn(sv, "-I", 2);
1694 sv_catpvn(sv, p, len);
1695 sv_catpvn(sv, " ", 1);
1699 Perl_croak(aTHX_ "No directory specified for -I");
1703 PL_preprocess = TRUE;
1716 PL_preambleav = newAV();
1717 av_push(PL_preambleav,
1718 newSVpv("use Config;",0));
1722 opts_prog = newSVpv("print Config::myconfig(),",0);
1724 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1726 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1728 opts = SvCUR(opts_prog);
1730 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1734 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1735 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1737 # ifdef FAKE_THREADS
1740 # ifdef MULTIPLICITY
1746 # ifdef PERL_DONT_CREATE_GVSV
1747 " PERL_DONT_CREATE_GVSV"
1749 # ifdef PERL_GLOBAL_STRUCT
1750 " PERL_GLOBAL_STRUCT"
1752 # ifdef PERL_IMPLICIT_CONTEXT
1753 " PERL_IMPLICIT_CONTEXT"
1755 # ifdef PERL_IMPLICIT_SYS
1756 " PERL_IMPLICIT_SYS"
1758 # ifdef PERL_MALLOC_WRAP
1761 # ifdef PERL_NEED_APPCTX
1764 # ifdef PERL_NEED_TIMESBASE
1765 " PERL_NEED_TIMESBASE"
1767 # ifdef PERL_OLD_COPY_ON_WRITE
1768 " PERL_OLD_COPY_ON_WRITE"
1770 # ifdef PERL_USE_SAFE_PUTENV
1771 " PERL_USE_SAFE_PUTENV"
1773 # ifdef PL_OP_SLAB_ALLOC
1776 # ifdef THREADS_HAVE_PIDS
1777 " THREADS_HAVE_PIDS"
1779 # ifdef USE_5005THREADS
1782 # ifdef USE_64_BIT_ALL
1785 # ifdef USE_64_BIT_INT
1788 # ifdef USE_ITHREADS
1791 # ifdef USE_LARGE_FILES
1794 # ifdef USE_LONG_DOUBLE
1800 # ifdef USE_REENTRANT_API
1801 " USE_REENTRANT_API"
1806 # ifdef USE_SITECUSTOMIZE
1807 " USE_SITECUSTOMIZE"
1814 while (SvCUR(opts_prog) > opts+76) {
1815 /* find last space after "options: " and before col 76
1819 char *pv = SvPV_nolen(opts_prog);
1820 const char c = pv[opts+76];
1822 space = strrchr(pv+opts+26, ' ');
1824 if (!space) break; /* "Can't happen" */
1826 /* break the line before that space */
1829 sv_insert(opts_prog, opts, 0,
1833 sv_catpv(opts_prog,"\\n\",");
1835 #if defined(LOCAL_PATCH_COUNT)
1836 if (LOCAL_PATCH_COUNT > 0) {
1839 "\" Locally applied patches:\\n\",");
1840 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1841 if (PL_localpatches[i])
1842 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1843 0, PL_localpatches[i], 0);
1847 Perl_sv_catpvf(aTHX_ opts_prog,
1848 "\" Built under %s\\n\"",OSNAME);
1851 Perl_sv_catpvf(aTHX_ opts_prog,
1852 ",\" Compiled at %s %s\\n\"",__DATE__,
1855 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1859 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1860 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1861 "sort grep {/^PERL/} keys %ENV; ");
1864 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1867 "print \" \\%ENV:\\n @env\\n\" if @env;"
1868 "print \" \\@INC:\\n @INC\\n\";");
1872 opts_prog = Perl_newSVpvf(aTHX_
1873 "Config::config_vars(qw%c%s%c)",
1877 av_push(PL_preambleav, opts_prog);
1878 /* don't look for script or read stdin */
1879 scriptname = BIT_BUCKET;
1883 PL_doextract = TRUE;
1891 if (!*++s || isSPACE(*s)) {
1895 /* catch use of gnu style long options */
1896 if (strEQ(s, "version")) {
1900 if (strEQ(s, "help")) {
1907 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1913 #ifndef SECURE_INTERNAL_GETENV
1916 (s = PerlEnv_getenv("PERL5OPT")))
1918 const char *popt = s;
1921 if (*s == '-' && *(s+1) == 'T') {
1922 CHECK_MALLOC_TOO_LATE_FOR('T');
1924 PL_taint_warn = FALSE;
1927 char *popt_copy = Nullch;
1940 if (!strchr("CDIMUdmtwA", *s))
1941 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1945 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1946 s = popt_copy + (s - popt);
1947 d = popt_copy + (d - popt);
1954 if( !PL_tainting ) {
1955 PL_taint_warn = TRUE;
1965 #ifdef USE_SITECUSTOMIZE
1968 PL_preambleav = newAV();
1969 av_unshift(PL_preambleav, 1);
1970 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1974 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1975 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1979 scriptname = argv[0];
1982 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1984 else if (scriptname == Nullch) {
1986 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1992 /* Set $^X early so that it can be used for relocatable paths in @INC */
1993 assert (!PL_tainted);
1995 S_set_caret_X(aTHX);
1999 open_script(scriptname,dosearch,sv);
2001 validate_suid(validarg, scriptname);
2004 #if defined(SIGCHLD) || defined(SIGCLD)
2007 # define SIGCHLD SIGCLD
2009 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2010 if (sigstate == (Sighandler_t) SIG_IGN) {
2011 if (ckWARN(WARN_SIGNAL))
2012 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2013 "Can't ignore signal CHLD, forcing to default");
2014 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2020 #ifdef MACOS_TRADITIONAL
2021 if (PL_doextract || gMacPerl_AlwaysExtract) {
2026 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2027 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2031 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2032 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2033 CvUNIQUE_on(PL_compcv);
2035 CvPADLIST(PL_compcv) = pad_new(0);
2036 #ifdef USE_5005THREADS
2037 CvOWNER(PL_compcv) = 0;
2038 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2039 MUTEX_INIT(CvMUTEXP(PL_compcv));
2040 #endif /* USE_5005THREADS */
2043 boot_core_UNIVERSAL();
2044 boot_core_xsutils();
2047 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2049 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2055 # ifdef HAS_SOCKS5_INIT
2056 socks5_init(argv[0]);
2062 init_predump_symbols();
2063 /* init_postdump_symbols not currently designed to be called */
2064 /* more than once (ENV isn't cleared first, for example) */
2065 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2067 init_postdump_symbols(argc,argv,env);
2069 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2070 * or explicitly in some platforms.
2071 * locale.c:Perl_init_i18nl10n() if the environment
2072 * look like the user wants to use UTF-8. */
2073 #if defined(__SYMBIAN32__)
2074 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2077 /* Requires init_predump_symbols(). */
2078 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2083 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2084 * and the default open disciplines. */
2085 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2086 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2088 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2089 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2090 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2092 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2093 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2094 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2096 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2097 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2098 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2099 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2100 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2103 sv_setpvn(sv, ":utf8\0:utf8", 11);
2105 sv_setpvn(sv, ":utf8\0", 6);
2108 sv_setpvn(sv, "\0:utf8", 6);
2114 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2115 if (strEQ(s, "unsafe"))
2116 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2117 else if (strEQ(s, "safe"))
2118 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2120 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2125 /* now parse the script */
2127 SETERRNO(0,SS_NORMAL);
2129 #ifdef MACOS_TRADITIONAL
2130 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2132 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2134 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2135 MacPerl_MPWFileName(PL_origfilename));
2139 if (yyparse() || PL_error_count) {
2141 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2143 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2148 CopLINE_set(PL_curcop, 0);
2149 PL_curstash = PL_defstash;
2150 PL_preprocess = FALSE;
2152 SvREFCNT_dec(PL_e_script);
2153 PL_e_script = Nullsv;
2160 SAVECOPFILE(PL_curcop);
2161 SAVECOPLINE(PL_curcop);
2162 gv_check(PL_defstash);
2169 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2170 dump_mstats("after compilation:");
2179 =for apidoc perl_run
2181 Tells a Perl interpreter to run. See L<perlembed>.
2193 PERL_UNUSED_ARG(my_perl);
2195 oldscope = PL_scopestack_ix;
2203 cxstack_ix = -1; /* start context stack again */
2205 case 0: /* normal completion */
2209 case 2: /* my_exit() */
2210 while (PL_scopestack_ix > oldscope)
2213 PL_curstash = PL_defstash;
2214 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2215 PL_endav && !PL_minus_c)
2216 call_list(oldscope, PL_endav);
2218 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2219 dump_mstats("after execution: ");
2225 POPSTACK_TO(PL_mainstack);
2228 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2240 S_run_body(pTHX_ I32 oldscope)
2242 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2243 PL_sawampersand ? "Enabling" : "Omitting"));
2245 if (!PL_restartop) {
2246 DEBUG_x(dump_all());
2249 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2251 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2255 #ifdef MACOS_TRADITIONAL
2256 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2257 (gMacPerl_ErrorFormat ? "# " : ""),
2258 MacPerl_MPWFileName(PL_origfilename));
2260 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2264 if (PERLDB_SINGLE && PL_DBsingle)
2265 sv_setiv(PL_DBsingle, 1);
2267 call_list(oldscope, PL_initav);
2273 PL_op = PL_restartop;
2277 else if (PL_main_start) {
2278 CvDEPTH(PL_main_cv) = 1;
2279 PL_op = PL_main_start;
2287 =head1 SV Manipulation Functions
2289 =for apidoc p||get_sv
2291 Returns the SV of the specified Perl scalar. If C<create> is set and the
2292 Perl variable does not exist then it will be created. If C<create> is not
2293 set and the variable does not exist then NULL is returned.
2299 Perl_get_sv(pTHX_ const char *name, I32 create)
2302 #ifdef USE_5005THREADS
2303 if (name[1] == '\0' && !isALPHA(name[0])) {
2304 PADOFFSET tmp = find_threadsv(name);
2305 if (tmp != NOT_IN_PAD)
2306 return THREADSV(tmp);
2308 #endif /* USE_5005THREADS */
2309 gv = gv_fetchpv(name, create, SVt_PV);
2316 =head1 Array Manipulation Functions
2318 =for apidoc p||get_av
2320 Returns the AV of the specified Perl array. If C<create> is set and the
2321 Perl variable does not exist then it will be created. If C<create> is not
2322 set and the variable does not exist then NULL is returned.
2328 Perl_get_av(pTHX_ const char *name, I32 create)
2330 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2339 =head1 Hash Manipulation Functions
2341 =for apidoc p||get_hv
2343 Returns the HV of the specified Perl hash. If C<create> is set and the
2344 Perl variable does not exist then it will be created. If C<create> is not
2345 set and the variable does not exist then NULL is returned.
2351 Perl_get_hv(pTHX_ const char *name, I32 create)
2353 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2362 =head1 CV Manipulation Functions
2364 =for apidoc p||get_cv
2366 Returns the CV of the specified Perl subroutine. If C<create> is set and
2367 the Perl subroutine does not exist then it will be declared (which has the
2368 same effect as saying C<sub name;>). If C<create> is not set and the
2369 subroutine does not exist then NULL is returned.
2375 Perl_get_cv(pTHX_ const char *name, I32 create)
2377 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2378 /* XXX unsafe for threads if eval_owner isn't held */
2379 /* XXX this is probably not what they think they're getting.
2380 * It has the same effect as "sub name;", i.e. just a forward
2382 if (create && !GvCVu(gv))
2383 return newSUB(start_subparse(FALSE, 0),
2384 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2392 /* Be sure to refetch the stack pointer after calling these routines. */
2396 =head1 Callback Functions
2398 =for apidoc p||call_argv
2400 Performs a callback to the specified Perl sub. See L<perlcall>.
2406 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2408 /* See G_* flags in cop.h */
2409 /* null terminated arg list */
2416 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2421 return call_pv(sub_name, flags);
2425 =for apidoc p||call_pv
2427 Performs a callback to the specified Perl sub. See L<perlcall>.
2433 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2434 /* name of the subroutine */
2435 /* See G_* flags in cop.h */
2437 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2441 =for apidoc p||call_method
2443 Performs a callback to the specified Perl method. The blessed object must
2444 be on the stack. See L<perlcall>.
2450 Perl_call_method(pTHX_ const char *methname, I32 flags)
2451 /* name of the subroutine */
2452 /* See G_* flags in cop.h */
2454 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2457 /* May be called with any of a CV, a GV, or an SV containing the name. */
2459 =for apidoc p||call_sv
2461 Performs a callback to the Perl sub whose name is in the SV. See
2468 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2469 /* See G_* flags in cop.h */
2472 LOGOP myop; /* fake syntax tree node */
2475 volatile I32 retval = 0;
2477 bool oldcatch = CATCH_GET;
2482 if (flags & G_DISCARD) {
2487 Zero(&myop, 1, LOGOP);
2488 myop.op_next = Nullop;
2489 if (!(flags & G_NOARGS))
2490 myop.op_flags |= OPf_STACKED;
2491 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2492 (flags & G_ARRAY) ? OPf_WANT_LIST :
2497 EXTEND(PL_stack_sp, 1);
2498 *++PL_stack_sp = sv;
2500 oldscope = PL_scopestack_ix;
2502 if (PERLDB_SUB && PL_curstash != PL_debstash
2503 /* Handle first BEGIN of -d. */
2504 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2505 /* Try harder, since this may have been a sighandler, thus
2506 * curstash may be meaningless. */
2507 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2508 && !(flags & G_NODEBUG))
2509 PL_op->op_private |= OPpENTERSUB_DB;
2511 if (flags & G_METHOD) {
2512 Zero(&method_op, 1, UNOP);
2513 method_op.op_next = PL_op;
2514 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2515 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2516 PL_op = (OP*)&method_op;
2519 if (!(flags & G_EVAL)) {
2521 call_body((OP*)&myop, FALSE);
2522 retval = PL_stack_sp - (PL_stack_base + oldmark);
2523 CATCH_SET(oldcatch);
2526 myop.op_other = (OP*)&myop;
2528 /* we're trying to emulate pp_entertry() here */
2530 register PERL_CONTEXT *cx;
2531 const I32 gimme = GIMME_V;
2536 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2538 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2540 PL_in_eval = EVAL_INEVAL;
2541 if (flags & G_KEEPERR)
2542 PL_in_eval |= EVAL_KEEPERR;
2544 sv_setpvn(ERRSV,"",0);
2552 call_body((OP*)&myop, FALSE);
2553 retval = PL_stack_sp - (PL_stack_base + oldmark);
2554 if (!(flags & G_KEEPERR))
2555 sv_setpvn(ERRSV,"",0);
2561 /* my_exit() was called */
2562 PL_curstash = PL_defstash;
2565 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2566 Perl_croak(aTHX_ "Callback called exit");
2571 PL_op = PL_restartop;
2575 PL_stack_sp = PL_stack_base + oldmark;
2576 if (flags & G_ARRAY)
2580 *++PL_stack_sp = &PL_sv_undef;
2585 if (PL_scopestack_ix > oldscope) {
2589 register PERL_CONTEXT *cx;
2596 PERL_UNUSED_VAR(newsp);
2597 PERL_UNUSED_VAR(gimme);
2598 PERL_UNUSED_VAR(optype);
2603 if (flags & G_DISCARD) {
2604 PL_stack_sp = PL_stack_base + oldmark;
2614 S_call_body(pTHX_ const OP *myop, bool is_eval)
2616 if (PL_op == myop) {
2618 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2620 PL_op = Perl_pp_entersub(aTHX); /* this does */
2626 /* Eval a string. The G_EVAL flag is always assumed. */
2629 =for apidoc p||eval_sv
2631 Tells Perl to C<eval> the string in the SV.
2637 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2639 /* See G_* flags in cop.h */
2642 UNOP myop; /* fake syntax tree node */
2643 volatile I32 oldmark = SP - PL_stack_base;
2644 volatile I32 retval = 0;
2649 if (flags & G_DISCARD) {
2656 Zero(PL_op, 1, UNOP);
2657 EXTEND(PL_stack_sp, 1);
2658 *++PL_stack_sp = sv;
2660 if (!(flags & G_NOARGS))
2661 myop.op_flags = OPf_STACKED;
2662 myop.op_next = Nullop;
2663 myop.op_type = OP_ENTEREVAL;
2664 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2665 (flags & G_ARRAY) ? OPf_WANT_LIST :
2667 if (flags & G_KEEPERR)
2668 myop.op_flags |= OPf_SPECIAL;
2670 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2671 * before a PUSHEVAL, which corrupts the stack after a croak */
2672 TAINT_PROPER("eval_sv()");
2678 call_body((OP*)&myop,TRUE);
2679 retval = PL_stack_sp - (PL_stack_base + oldmark);
2680 if (!(flags & G_KEEPERR))
2681 sv_setpvn(ERRSV,"",0);
2687 /* my_exit() was called */
2688 PL_curstash = PL_defstash;
2691 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2692 Perl_croak(aTHX_ "Callback called exit");
2697 PL_op = PL_restartop;
2701 PL_stack_sp = PL_stack_base + oldmark;
2702 if (flags & G_ARRAY)
2706 *++PL_stack_sp = &PL_sv_undef;
2712 if (flags & G_DISCARD) {
2713 PL_stack_sp = PL_stack_base + oldmark;
2723 =for apidoc p||eval_pv
2725 Tells Perl to C<eval> the given string and return an SV* result.
2731 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2734 SV* sv = newSVpv(p, 0);
2736 eval_sv(sv, G_SCALAR);
2743 if (croak_on_error && SvTRUE(ERRSV)) {
2744 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2750 /* Require a module. */
2753 =head1 Embedding Functions
2755 =for apidoc p||require_pv
2757 Tells Perl to C<require> the file named by the string argument. It is
2758 analogous to the Perl code C<eval "require '$file'">. It's even
2759 implemented that way; consider using load_module instead.
2764 Perl_require_pv(pTHX_ const char *pv)
2768 PUSHSTACKi(PERLSI_REQUIRE);
2770 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2771 eval_sv(sv_2mortal(sv), G_DISCARD);
2777 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2781 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2782 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2786 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2788 /* This message really ought to be max 23 lines.
2789 * Removed -h because the user already knows that option. Others? */
2791 static const char * const usage_msg[] = {
2792 "-0[octal] specify record separator (\\0, if no argument)",
2793 "-A[mod][=pattern] activate all/given assertions",
2794 "-a autosplit mode with -n or -p (splits $_ into @F)",
2795 "-C[number/list] enables the listed Unicode features",
2796 "-c check syntax only (runs BEGIN and CHECK blocks)",
2797 "-d[:debugger] run program under debugger",
2798 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2799 "-e program one line of program (several -e's allowed, omit programfile)",
2800 "-f don't do $sitelib/sitecustomize.pl at startup",
2801 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2802 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2803 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2804 "-l[octal] enable line ending processing, specifies line terminator",
2805 "-[mM][-]module execute \"use/no module...\" before executing program",
2806 "-n assume \"while (<>) { ... }\" loop around program",
2807 "-p assume loop like -n but print line also, like sed",
2808 "-P run program through C preprocessor before compilation",
2809 "-s enable rudimentary parsing for switches after programfile",
2810 "-S look for programfile using PATH environment variable",
2811 "-t enable tainting warnings",
2812 "-T enable tainting checks",
2813 "-u dump core after parsing program",
2814 "-U allow unsafe operations",
2815 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2816 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2817 "-w enable many useful warnings (RECOMMENDED)",
2818 "-W enable all warnings",
2819 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2820 "-X disable all warnings",
2824 const char * const *p = usage_msg;
2826 PerlIO_printf(PerlIO_stdout(),
2827 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2830 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2833 /* convert a string of -D options (or digits) into an int.
2834 * sets *s to point to the char after the options */
2838 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2840 static const char * const usage_msgd[] = {
2841 " Debugging flag values: (see also -d)",
2842 " p Tokenizing and parsing (with v, displays parse stack)",
2843 " s Stack snapshots (with v, displays all stacks)",
2844 " l Context (loop) stack processing",
2845 " t Trace execution",
2846 " o Method and overloading resolution",
2847 " c String/numeric conversions",
2848 " P Print profiling info, preprocessor command for -P, source file input state",
2849 " m Memory allocation",
2850 " f Format processing",
2851 " r Regular expression parsing and execution",
2852 " x Syntax tree dump",
2853 " u Tainting checks",
2854 " H Hash dump -- usurps values()",
2855 " X Scratchpad allocation",
2857 " S Thread synchronization",
2859 " R Include reference counts of dumped variables (eg when using -Ds)",
2860 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2861 " v Verbose: use in conjunction with other flags",
2863 " A Consistency checks on internal structures",
2864 " q quiet - currently only suppresses the 'EXECUTING' message",
2869 /* if adding extra options, remember to update DEBUG_MASK */
2870 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2872 for (; isALNUM(**s); (*s)++) {
2873 const char *d = strchr(debopts,**s);
2875 i |= 1 << (d - debopts);
2876 else if (ckWARN_d(WARN_DEBUGGING))
2877 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2878 "invalid option -D%c, use -D'' to see choices\n", **s);
2881 else if (isDIGIT(**s)) {
2883 for (; isALNUM(**s); (*s)++) ;
2885 else if (givehelp) {
2886 const char *const *p = usage_msgd;
2887 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2890 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2891 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2892 "-Dp not implemented on this platform\n");
2898 /* This routine handles any switches that can be given during run */
2901 Perl_moreswitches(pTHX_ char *s)
2912 SvREFCNT_dec(PL_rs);
2913 if (s[1] == 'x' && s[2]) {
2914 const char *e = s+=2;
2920 flags = PERL_SCAN_SILENT_ILLDIGIT;
2921 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2922 if (s + numlen < e) {
2923 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2927 PL_rs = newSVpvn("", 0);
2928 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2929 tmps = (U8*)SvPVX(PL_rs);
2930 uvchr_to_utf8(tmps, rschar);
2931 SvCUR_set(PL_rs, UNISKIP(rschar));
2936 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2937 if (rschar & ~((U8)~0))
2938 PL_rs = &PL_sv_undef;
2939 else if (!rschar && numlen >= 2)
2940 PL_rs = newSVpvn("", 0);
2942 char ch = (char)rschar;
2943 PL_rs = newSVpvn(&ch, 1);
2946 sv_setsv(get_sv("/", TRUE), PL_rs);
2951 PL_unicode = parse_unicode_opts( (const char **)&s );
2956 while (*s && !isSPACE(*s)) ++s;
2958 PL_splitstr = savepv(PL_splitstr);
2972 /* -dt indicates to the debugger that threads will be used */
2973 if (*s == 't' && !isALNUM(s[1])) {
2975 my_setenv("PERL5DB_THREADED", "1");
2978 /* The following permits -d:Mod to accepts arguments following an =
2979 in the fashion that -MSome::Mod does. */
2980 if (*s == ':' || *s == '=') {
2983 sv = newSVpv("use Devel::", 0);
2985 /* We now allow -d:Module=Foo,Bar */
2986 while(isALNUM(*s) || *s==':') ++s;
2988 sv_catpv(sv, start);
2990 sv_catpvn(sv, start, s-start);
2991 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
2994 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2997 PL_perldb = PERLDB_ALL;
3006 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3007 #else /* !DEBUGGING */
3008 if (ckWARN_d(WARN_DEBUGGING))
3009 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3010 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3011 for (s++; isALNUM(*s); s++) ;
3016 usage(PL_origargv[0]);
3019 Safefree(PL_inplace);
3020 #if defined(__CYGWIN__) /* do backup extension automagically */
3021 if (*(s+1) == '\0') {
3022 PL_inplace = savepv(".bak");
3025 #endif /* __CYGWIN__ */
3026 PL_inplace = savepv(s+1);
3027 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3031 if (*s == '-') /* Additional switches on #! line. */
3035 case 'I': /* -I handled both here and in parse_body() */
3038 while (*s && isSPACE(*s))
3043 /* ignore trailing spaces (possibly followed by other switches) */
3045 for (e = p; *e && !isSPACE(*e); e++) ;
3049 } while (*p && *p != '-');
3050 e = savepvn(s, e-s);
3051 incpush(e, TRUE, TRUE, FALSE, FALSE);
3058 Perl_croak(aTHX_ "No directory specified for -I");
3064 SvREFCNT_dec(PL_ors_sv);
3070 PL_ors_sv = newSVpvn("\n",1);
3071 numlen = 3 + (*s == '0');
3072 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3076 if (RsPARA(PL_rs)) {
3077 PL_ors_sv = newSVpvn("\n\n",2);
3080 PL_ors_sv = newSVsv(PL_rs);
3087 PL_preambleav = newAV();
3090 char * const start = s;
3091 SV * const sv = newSVpv("use assertions::activate", 24);
3092 while(isALNUM(*s) || *s == ':') ++s;
3094 sv_catpvn(sv, "::", 2);
3095 sv_catpvn(sv, start, s-start);
3098 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3101 else if (*s != '\0') {
3102 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3104 av_push(PL_preambleav, sv);
3108 forbid_setid("-M"); /* XXX ? */
3111 forbid_setid("-m"); /* XXX ? */
3115 const char *use = "use ";
3116 /* -M-foo == 'no foo' */
3117 /* Leading space on " no " is deliberate, to make both
3118 possibilities the same length. */
3119 if (*s == '-') { use = " no "; ++s; }
3120 sv = newSVpvn(use,4);
3122 /* We allow -M'Module qw(Foo Bar)' */
3123 while(isALNUM(*s) || *s==':') ++s;
3125 sv_catpv(sv, start);
3126 if (*(start-1) == 'm') {
3128 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3129 sv_catpv( sv, " ()");
3133 Perl_croak(aTHX_ "Module name required with -%c option",
3135 sv_catpvn(sv, start, s-start);
3136 sv_catpv(sv, " split(/,/,q");
3137 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3139 sv_catpvn(sv, "\0)", 2);
3143 PL_preambleav = newAV();
3144 av_push(PL_preambleav, sv);
3147 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3159 PL_doswitches = TRUE;
3173 #ifdef MACOS_TRADITIONAL
3174 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3176 PL_do_undump = TRUE;
3184 if (!sv_derived_from(PL_patchlevel, "version"))
3185 (void *)upg_version(PL_patchlevel);
3187 PerlIO_printf(PerlIO_stdout(),
3188 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3189 vstringify(PL_patchlevel),
3192 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3193 PerlIO_printf(PerlIO_stdout(),
3194 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3195 vstringify(PL_patchlevel)));
3196 PerlIO_printf(PerlIO_stdout(),
3197 Perl_form(aTHX_ " built under %s at %s %s\n",
3198 OSNAME, __DATE__, __TIME__));
3199 PerlIO_printf(PerlIO_stdout(),
3200 Perl_form(aTHX_ " OS Specific Release: %s\n",
3204 #if defined(LOCAL_PATCH_COUNT)
3205 if (LOCAL_PATCH_COUNT > 0)
3206 PerlIO_printf(PerlIO_stdout(),
3207 "\n(with %d registered patch%s, "
3208 "see perl -V for more detail)",
3209 (int)LOCAL_PATCH_COUNT,
3210 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3213 PerlIO_printf(PerlIO_stdout(),
3214 "\n\nCopyright 1987-2005, Larry Wall\n");
3215 #ifdef MACOS_TRADITIONAL
3216 PerlIO_printf(PerlIO_stdout(),
3217 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3218 "maintained by Chris Nandor\n");
3221 PerlIO_printf(PerlIO_stdout(),
3222 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3225 PerlIO_printf(PerlIO_stdout(),
3226 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3227 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3230 PerlIO_printf(PerlIO_stdout(),
3231 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3232 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3235 PerlIO_printf(PerlIO_stdout(),
3236 "atariST series port, ++jrb bammi@cadence.com\n");
3239 PerlIO_printf(PerlIO_stdout(),
3240 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3243 PerlIO_printf(PerlIO_stdout(),
3244 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3247 PerlIO_printf(PerlIO_stdout(),
3248 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "MiNT port by Guido Flohr, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "EPOC port by Olaf Flebbe, 1999-2002\n");
3271 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3272 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3275 #ifdef __SYMBIAN32__
3276 PerlIO_printf(PerlIO_stdout(),
3277 "Symbian port by Nokia, 2004-2005\n");
3279 #ifdef BINARY_BUILD_NOTICE
3280 BINARY_BUILD_NOTICE;
3282 PerlIO_printf(PerlIO_stdout(),
3284 Perl may be copied only under the terms of either the Artistic License or the\n\
3285 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3286 Complete documentation for Perl, including FAQ lists, should be found on\n\
3287 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3288 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3291 if (! (PL_dowarn & G_WARN_ALL_MASK))
3292 PL_dowarn |= G_WARN_ON;
3296 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3297 if (!specialWARN(PL_compiling.cop_warnings))
3298 SvREFCNT_dec(PL_compiling.cop_warnings);
3299 PL_compiling.cop_warnings = pWARN_ALL ;
3303 PL_dowarn = G_WARN_ALL_OFF;
3304 if (!specialWARN(PL_compiling.cop_warnings))
3305 SvREFCNT_dec(PL_compiling.cop_warnings);
3306 PL_compiling.cop_warnings = pWARN_NONE ;
3311 if (s[1] == '-') /* Additional switches on #! line. */
3316 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3322 #ifdef ALTERNATE_SHEBANG
3323 case 'S': /* OS/2 needs -S on "extproc" line. */
3331 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3336 /* compliments of Tom Christiansen */
3338 /* unexec() can be found in the Gnu emacs distribution */
3339 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3342 Perl_my_unexec(pTHX)
3350 prog = newSVpv(BIN_EXP, 0);
3351 sv_catpv(prog, "/perl");
3352 file = newSVpv(PL_origfilename, 0);
3353 sv_catpv(file, ".perldump");
3355 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3356 /* unexec prints msg to stderr in case of failure */
3357 PerlProc_exit(status);
3360 # include <lib$routines.h>
3361 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3363 ABORT(); /* for use with undump */
3368 /* initialize curinterp */
3374 # define PERLVAR(var,type)
3375 # define PERLVARA(var,n,type)
3376 # if defined(PERL_IMPLICIT_CONTEXT)
3377 # if defined(USE_5005THREADS)
3378 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3379 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3380 # else /* !USE_5005THREADS */
3381 # define PERLVARI(var,type,init) aTHX->var = init;
3382 # define PERLVARIC(var,type,init) aTHX->var = init;
3383 # endif /* USE_5005THREADS */
3385 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3386 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3388 # include "intrpvar.h"
3389 # ifndef USE_5005THREADS
3390 # include "thrdvar.h"
3397 # define PERLVAR(var,type)
3398 # define PERLVARA(var,n,type)
3399 # define PERLVARI(var,type,init) PL_##var = init;
3400 # define PERLVARIC(var,type,init) PL_##var = init;
3401 # include "intrpvar.h"
3402 # ifndef USE_5005THREADS
3403 # include "thrdvar.h"
3414 S_init_main_stash(pTHX)
3418 PL_curstash = PL_defstash = newHV();
3419 PL_curstname = newSVpvn("main",4);
3420 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3421 SvREFCNT_dec(GvHV(gv));
3422 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3424 hv_name_set(PL_defstash, "main", 4, 0);
3425 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3426 GvMULTI_on(PL_incgv);
3427 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3428 GvMULTI_on(PL_hintgv);
3429 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3430 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3431 GvMULTI_on(PL_errgv);
3432 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3433 GvMULTI_on(PL_replgv);
3434 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3435 #ifdef PERL_DONT_CREATE_GVSV
3438 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3439 sv_setpvn(ERRSV, "", 0);
3440 PL_curstash = PL_defstash;
3441 CopSTASH_set(&PL_compiling, PL_defstash);
3442 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3443 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3444 /* We must init $/ before switches are processed. */
3445 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3448 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3450 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3455 const char *cpp_discard_flag;
3464 PL_origfilename = savepvn("-e", 2);
3467 /* if find_script() returns, it returns a malloc()-ed value */
3468 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3470 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3471 const char *s = scriptname + 8;
3472 PL_fdscript = atoi(s);
3477 * Tell apart "normal" usage of fdscript, e.g.
3478 * with bash on FreeBSD:
3479 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3480 * from usage in suidperl.
3481 * Does any "normal" usage leave garbage after the number???
3482 * Is it a mistake to use a similar /dev/fd/ construct for
3487 * Be supersafe and do some sanity-checks.
3488 * Still, can we be sure we got the right thing?
3491 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3494 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3496 scriptname = savepv(s + 1);
3497 Safefree(PL_origfilename);
3498 PL_origfilename = (char *)scriptname;
3503 CopFILE_free(PL_curcop);
3504 CopFILE_set(PL_curcop, PL_origfilename);
3505 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3506 scriptname = (char *)"";
3507 if (PL_fdscript >= 0) {
3508 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3509 # if defined(HAS_FCNTL) && defined(F_SETFD)
3511 /* ensure close-on-exec */
3512 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3517 Perl_croak(aTHX_ "sperl needs fd script\n"
3518 "You should not call sperl directly; do you need to "
3519 "change a #! line\nfrom sperl to perl?\n");
3522 * Do not open (or do other fancy stuff) while setuid.
3523 * Perl does the open, and hands script to suidperl on a fd;
3524 * suidperl only does some checks, sets up UIDs and re-execs
3525 * perl with that fd as it has always done.
3528 if (PL_suidscript != 1) {
3529 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3532 else if (PL_preprocess) {
3533 const char *cpp_cfg = CPPSTDIN;
3534 SV *cpp = newSVpvn("",0);
3535 SV *cmd = NEWSV(0,0);
3537 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3538 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3539 if (strEQ(cpp_cfg, "cppstdin"))
3540 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3541 sv_catpv(cpp, cpp_cfg);
3544 sv_catpvn(sv, "-I", 2);
3545 sv_catpv(sv,PRIVLIB_EXP);
3548 DEBUG_P(PerlIO_printf(Perl_debug_log,
3549 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3550 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3553 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3560 cpp_discard_flag = "";
3562 cpp_discard_flag = "-C";
3566 perl = os2_execname(aTHX);
3568 perl = PL_origargv[0];
3572 /* This strips off Perl comments which might interfere with
3573 the C pre-processor, including #!. #line directives are
3574 deliberately stripped to avoid confusion with Perl's version
3575 of #line. FWP played some golf with it so it will fit
3576 into VMS's 255 character buffer.
3579 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3581 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3583 Perl_sv_setpvf(aTHX_ cmd, "\
3584 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3585 perl, quote, code, quote, scriptname, cpp,
3586 cpp_discard_flag, sv, CPPMINUS);
3588 PL_doextract = FALSE;
3590 DEBUG_P(PerlIO_printf(Perl_debug_log,
3591 "PL_preprocess: cmd=\"%s\"\n",
3594 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3598 else if (!*scriptname) {
3599 forbid_setid("program input from stdin");
3600 PL_rsfp = PerlIO_stdin();
3603 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3604 # if defined(HAS_FCNTL) && defined(F_SETFD)
3606 /* ensure close-on-exec */
3607 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3610 #endif /* IAMSUID */
3612 /* PSz 16 Sep 03 Keep neat error message */
3614 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3616 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3617 CopFILE(PL_curcop), Strerror(errno));
3622 * I_SYSSTATVFS HAS_FSTATVFS
3624 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3625 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3626 * here so that metaconfig picks them up. */
3630 S_fd_on_nosuid_fs(pTHX_ int fd)
3633 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3634 * but is needed also on machines without setreuid.
3635 * Seems safe enough to run as root.
3637 int check_okay = 0; /* able to do all the required sys/libcalls */
3638 int on_nosuid = 0; /* the fd is on a nosuid fs */
3640 * Need to check noexec also: nosuid might not be set, the average
3641 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3643 int on_noexec = 0; /* the fd is on a noexec fs */
3646 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3647 * fstatvfs() is UNIX98.
3648 * fstatfs() is 4.3 BSD.
3649 * ustat()+getmnt() is pre-4.3 BSD.
3650 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3651 * an irrelevant filesystem while trying to reach the right one.
3654 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3656 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3657 defined(HAS_FSTATVFS)
3658 # define FD_ON_NOSUID_CHECK_OKAY
3659 struct statvfs stfs;
3661 check_okay = fstatvfs(fd, &stfs) == 0;
3662 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3664 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3665 on platforms where it is present. */
3666 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3668 # endif /* fstatvfs */
3670 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3671 defined(PERL_MOUNT_NOSUID) && \
3672 defined(PERL_MOUNT_NOEXEC) && \
3673 defined(HAS_FSTATFS) && \
3674 defined(HAS_STRUCT_STATFS) && \
3675 defined(HAS_STRUCT_STATFS_F_FLAGS)
3676 # define FD_ON_NOSUID_CHECK_OKAY
3679 check_okay = fstatfs(fd, &stfs) == 0;
3680 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3681 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3682 # endif /* fstatfs */
3684 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3685 defined(PERL_MOUNT_NOSUID) && \
3686 defined(PERL_MOUNT_NOEXEC) && \
3687 defined(HAS_FSTAT) && \
3688 defined(HAS_USTAT) && \
3689 defined(HAS_GETMNT) && \
3690 defined(HAS_STRUCT_FS_DATA) && \
3692 # define FD_ON_NOSUID_CHECK_OKAY
3695 if (fstat(fd, &fdst) == 0) {
3697 if (ustat(fdst.st_dev, &us) == 0) {
3699 /* NOSTAT_ONE here because we're not examining fields which
3700 * vary between that case and STAT_ONE. */
3701 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3702 size_t cmplen = sizeof(us.f_fname);
3703 if (sizeof(fsd.fd_req.path) < cmplen)
3704 cmplen = sizeof(fsd.fd_req.path);
3705 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3706 fdst.st_dev == fsd.fd_req.dev) {
3708 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3709 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3714 # endif /* fstat+ustat+getmnt */
3716 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3717 defined(HAS_GETMNTENT) && \
3718 defined(HAS_HASMNTOPT) && \
3719 defined(MNTOPT_NOSUID) && \
3720 defined(MNTOPT_NOEXEC)
3721 # define FD_ON_NOSUID_CHECK_OKAY
3722 FILE *mtab = fopen("/etc/mtab", "r");
3723 struct mntent *entry;
3726 if (mtab && (fstat(fd, &stb) == 0)) {
3727 while (entry = getmntent(mtab)) {
3728 if (stat(entry->mnt_dir, &fsb) == 0
3729 && fsb.st_dev == stb.st_dev)
3731 /* found the filesystem */
3733 if (hasmntopt(entry, MNTOPT_NOSUID))
3735 if (hasmntopt(entry, MNTOPT_NOEXEC))
3738 } /* A single fs may well fail its stat(). */
3743 # endif /* getmntent+hasmntopt */
3746 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3748 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3750 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3751 return ((!check_okay) || on_nosuid || on_noexec);
3753 #endif /* IAMSUID */
3756 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3761 #endif /* IAMSUID */
3763 /* do we need to emulate setuid on scripts? */
3765 /* This code is for those BSD systems that have setuid #! scripts disabled
3766 * in the kernel because of a security problem. Merely defining DOSUID
3767 * in perl will not fix that problem, but if you have disabled setuid
3768 * scripts in the kernel, this will attempt to emulate setuid and setgid
3769 * on scripts that have those now-otherwise-useless bits set. The setuid
3770 * root version must be called suidperl or sperlN.NNN. If regular perl
3771 * discovers that it has opened a setuid script, it calls suidperl with
3772 * the same argv that it had. If suidperl finds that the script it has
3773 * just opened is NOT setuid root, it sets the effective uid back to the
3774 * uid. We don't just make perl setuid root because that loses the
3775 * effective uid we had before invoking perl, if it was different from the
3778 * Description/comments above do not match current workings:
3779 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3780 * suidperl called with script open and name changed to /dev/fd/N/X;
3781 * suidperl croaks if script is not setuid;
3782 * making perl setuid would be a huge security risk (and yes, that
3783 * would lose any euid we might have had).
3785 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3786 * be defined in suidperl only. suidperl must be setuid root. The
3787 * Configure script will set this up for you if you want it.
3793 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3794 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3795 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3797 const char *linestr;
3800 if (PL_fdscript < 0 || PL_suidscript != 1)
3801 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3803 * Since the script is opened by perl, not suidperl, some of these
3804 * checks are superfluous. Leaving them in probably does not lower
3808 * Do checks even for systems with no HAS_SETREUID.
3809 * We used to swap, then re-swap UIDs with
3811 if (setreuid(PL_euid,PL_uid) < 0
3812 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3813 Perl_croak(aTHX_ "Can't swap uid and euid");
3816 if (setreuid(PL_uid,PL_euid) < 0
3817 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3818 Perl_croak(aTHX_ "Can't reswap uid and euid");
3822 /* On this access check to make sure the directories are readable,
3823 * there is actually a small window that the user could use to make
3824 * filename point to an accessible directory. So there is a faint
3825 * chance that someone could execute a setuid script down in a
3826 * non-accessible directory. I don't know what to do about that.
3827 * But I don't think it's too important. The manual lies when
3828 * it says access() is useful in setuid programs.
3830 * So, access() is pretty useless... but not harmful... do anyway.
3832 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3833 Perl_croak(aTHX_ "Can't access() script\n");
3836 /* If we can swap euid and uid, then we can determine access rights
3837 * with a simple stat of the file, and then compare device and
3838 * inode to make sure we did stat() on the same file we opened.
3839 * Then we just have to make sure he or she can execute it.
3842 * As the script is opened by perl, not suidperl, we do not need to
3843 * care much about access rights.
3845 * The 'script changed' check is needed, or we can get lied to
3846 * about $0 with e.g.
3847 * suidperl /dev/fd/4//bin/x 4<setuidscript
3848 * Without HAS_SETREUID, is it safe to stat() as root?
3850 * Are there any operating systems that pass /dev/fd/xxx for setuid
3851 * scripts, as suggested/described in perlsec(1)? Surely they do not
3852 * pass the script name as we do, so the "script changed" test would
3853 * fail for them... but we never get here with
3854 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3856 * This is one place where we must "lie" about return status: not
3857 * say if the stat() failed. We are doing this as root, and could
3858 * be tricked into reporting existence or not of files that the
3859 * "plain" user cannot even see.
3863 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3864 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3865 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3866 Perl_croak(aTHX_ "Setuid script changed\n");
3870 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3871 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3874 * We used to do this check as the "plain" user (after swapping
3875 * UIDs). But the check for nosuid and noexec filesystem is needed,
3876 * and should be done even without HAS_SETREUID. (Maybe those
3877 * operating systems do not have such mount options anyway...)
3878 * Seems safe enough to do as root.
3880 #if !defined(NO_NOSUID_CHECK)
3881 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3882 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3885 #endif /* IAMSUID */
3887 if (!S_ISREG(PL_statbuf.st_mode)) {
3888 Perl_croak(aTHX_ "Setuid script not plain file\n");
3890 if (PL_statbuf.st_mode & S_IWOTH)
3891 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3892 PL_doswitches = FALSE; /* -s is insecure in suid */
3893 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3894 CopLINE_inc(PL_curcop);
3895 linestr = SvPV_nolen_const(PL_linestr);
3896 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3897 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3898 Perl_croak(aTHX_ "No #! line");
3902 /* Sanity check on line length */
3903 if (strlen(s) < 1 || strlen(s) > 4000)
3904 Perl_croak(aTHX_ "Very long #! line");
3905 /* Allow more than a single space after #! */
3906 while (isSPACE(*s)) s++;
3907 /* Sanity check on buffer end */
3908 while ((*s) && !isSPACE(*s)) s++;
3909 for (s2 = s; (s2 > linestr &&
3910 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3911 || s2[-1] == '-')); s2--) ;
3912 /* Sanity check on buffer start */
3913 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3914 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3915 Perl_croak(aTHX_ "Not a perl script");
3916 while (*s == ' ' || *s == '\t') s++;
3918 * #! arg must be what we saw above. They can invoke it by
3919 * mentioning suidperl explicitly, but they may not add any strange
3920 * arguments beyond what #! says if they do invoke suidperl that way.
3923 * The way validarg was set up, we rely on the kernel to start
3924 * scripts with argv[1] set to contain all #! line switches (the
3928 * Check that we got all the arguments listed in the #! line (not
3929 * just that there are no extraneous arguments). Might not matter
3930 * much, as switches from #! line seem to be acted upon (also), and
3931 * so may be checked and trapped in perl. But, security checks must
3932 * be done in suidperl and not deferred to perl. Note that suidperl
3933 * does not get around to parsing (and checking) the switches on
3934 * the #! line (but execs perl sooner).
3935 * Allow (require) a trailing newline (which may be of two
3936 * characters on some architectures?) (but no other trailing
3939 len = strlen(validarg);
3940 if (strEQ(validarg," PHOOEY ") ||
3941 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3942 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3943 Perl_croak(aTHX_ "Args must match #! line");
3946 if (PL_fdscript < 0 &&
3947 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3948 PL_euid == PL_statbuf.st_uid)
3950 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3951 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3952 #endif /* IAMSUID */
3954 if (PL_fdscript < 0 &&
3955 PL_euid) { /* oops, we're not the setuid root perl */
3957 * When root runs a setuid script, we do not go through the same
3958 * steps of execing sperl and then perl with fd scripts, but
3959 * simply set up UIDs within the same perl invocation; so do
3960 * not have the same checks (on options, whatever) that we have
3961 * for plain users. No problem really: would have to be a script
3962 * that does not actually work for plain users; and if root is
3963 * foolish and can be persuaded to run such an unsafe script, he
3964 * might run also non-setuid ones, and deserves what he gets.
3966 * Or, we might drop the PL_euid check above (and rely just on
3967 * PL_fdscript to avoid loops), and do the execs
3973 * Pass fd script to suidperl.
3974 * Exec suidperl, substituting fd script for scriptname.
3975 * Pass script name as "subdir" of fd, which perl will grok;
3976 * in fact will use that to distinguish this from "normal"
3977 * usage, see comments above.
3979 PerlIO_rewind(PL_rsfp);
3980 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3981 /* PSz 27 Feb 04 Sanity checks on scriptname */
3982 if ((!scriptname) || (!*scriptname) ) {
3983 Perl_croak(aTHX_ "No setuid script name\n");
3985 if (*scriptname == '-') {
3986 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3987 /* Or we might confuse it with an option when replacing
3988 * name in argument list, below (though we do pointer, not
3989 * string, comparisons).
3992 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3993 if (!PL_origargv[which]) {
3994 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3996 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3997 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3998 #if defined(HAS_FCNTL) && defined(F_SETFD)
3999 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4002 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4003 (int)PERL_REVISION, (int)PERL_VERSION,
4004 (int)PERL_SUBVERSION), PL_origargv);
4006 #endif /* IAMSUID */
4007 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4010 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4012 * This seems back to front: we try HAS_SETEGID first; if not available
4013 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4014 * in the sense that we only want to set EGID; but are there any machines
4015 * with either of the latter, but not the former? Same with UID, later.
4018 (void)setegid(PL_statbuf.st_gid);
4021 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4023 #ifdef HAS_SETRESGID
4024 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4026 PerlProc_setgid(PL_statbuf.st_gid);
4030 if (PerlProc_getegid() != PL_statbuf.st_gid)
4031 Perl_croak(aTHX_ "Can't do setegid!\n");
4033 if (PL_statbuf.st_mode & S_ISUID) {
4034 if (PL_statbuf.st_uid != PL_euid)
4036 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4039 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4041 #ifdef HAS_SETRESUID
4042 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4044 PerlProc_setuid(PL_statbuf.st_uid);
4048 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4049 Perl_croak(aTHX_ "Can't do seteuid!\n");
4051 else if (PL_uid) { /* oops, mustn't run as root */
4053 (void)seteuid((Uid_t)PL_uid);
4056 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4058 #ifdef HAS_SETRESUID
4059 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4061 PerlProc_setuid((Uid_t)PL_uid);
4065 if (PerlProc_geteuid() != PL_uid)
4066 Perl_croak(aTHX_ "Can't do seteuid!\n");
4069 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4070 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4073 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4074 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4075 else if (PL_fdscript < 0 || PL_suidscript != 1)
4076 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4077 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4079 /* PSz 16 Sep 03 Keep neat error message */
4080 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4083 /* We absolutely must clear out any saved ids here, so we */
4084 /* exec the real perl, substituting fd script for scriptname. */
4085 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4087 * It might be thought that using setresgid and/or setresuid (changed to
4088 * set the saved IDs) above might obviate the need to exec, and we could
4089 * go on to "do the perl thing".
4091 * Is there such a thing as "saved GID", and is that set for setuid (but
4092 * not setgid) execution like suidperl? Without exec, it would not be
4093 * cleared for setuid (but not setgid) scripts (or might need a dummy
4096 * We need suidperl to do the exact same argument checking that perl
4097 * does. Thus it cannot be very small; while it could be significantly
4098 * smaller, it is safer (simpler?) to make it essentially the same
4099 * binary as perl (but they are not identical). - Maybe could defer that
4100 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4101 * but prefer to do thorough checks in suidperl itself. Such deferral
4102 * would make suidperl security rely on perl, a design no-no.
4104 * Setuid things should be short and simple, thus easy to understand and
4105 * verify. They should do their "own thing", without influence by
4106 * attackers. It may help if their internal execution flow is fixed,
4107 * regardless of platform: it may be best to exec anyway.
4109 * Suidperl should at least be conceptually simple: a wrapper only,
4110 * never to do any real perl. Maybe we should put
4112 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4114 * into the perly bits.
4116 PerlIO_rewind(PL_rsfp);
4117 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4119 * Keep original arguments: suidperl already has fd script.
4121 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4122 /* if (!PL_origargv[which]) { */
4123 /* errno = EPERM; */
4124 /* Perl_croak(aTHX_ "Permission denied\n"); */
4126 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4127 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4128 #if defined(HAS_FCNTL) && defined(F_SETFD)
4129 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4132 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4133 (int)PERL_REVISION, (int)PERL_VERSION,
4134 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4136 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4137 #endif /* IAMSUID */
4139 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4140 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4141 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4142 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4144 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4147 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4148 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4149 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4150 /* not set-id, must be wrapped */
4158 S_find_beginning(pTHX)
4161 register const char *s2;
4162 #ifdef MACOS_TRADITIONAL
4166 /* skip forward in input to the real script? */
4169 #ifdef MACOS_TRADITIONAL
4170 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4172 while (PL_doextract || gMacPerl_AlwaysExtract) {
4173 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4174 if (!gMacPerl_AlwaysExtract)
4175 Perl_croak(aTHX_ "No Perl script found in input\n");
4177 if (PL_doextract) /* require explicit override ? */
4178 if (!OverrideExtract(PL_origfilename))
4179 Perl_croak(aTHX_ "User aborted script\n");
4181 PL_doextract = FALSE;
4183 /* Pater peccavi, file does not have #! */
4184 PerlIO_rewind(PL_rsfp);
4189 while (PL_doextract) {
4190 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4191 Perl_croak(aTHX_ "No Perl script found in input\n");
4194 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4195 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4196 PL_doextract = FALSE;
4197 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4199 while (*s == ' ' || *s == '\t') s++;
4201 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4202 || s2[-1] == '_') s2--;
4203 if (strnEQ(s2-4,"perl",4))
4204 while ((s = moreswitches(s)))
4207 #ifdef MACOS_TRADITIONAL
4208 /* We are always searching for the #!perl line in MacPerl,
4209 * so if we find it, still keep the line count correct
4210 * by counting lines we already skipped over
4212 for (; maclines > 0 ; maclines--)
4213 PerlIO_ungetc(PL_rsfp, '\n');
4217 /* gMacPerl_AlwaysExtract is false in MPW tool */
4218 } else if (gMacPerl_AlwaysExtract) {
4229 PL_uid = PerlProc_getuid();
4230 PL_euid = PerlProc_geteuid();
4231 PL_gid = PerlProc_getgid();
4232 PL_egid = PerlProc_getegid();
4234 PL_uid |= PL_gid << 16;
4235 PL_euid |= PL_egid << 16;
4237 /* Should not happen: */
4238 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4239 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4242 * Should go by suidscript, not uid!=euid: why disallow
4243 * system("ls") in scripts run from setuid things?
4244 * Or, is this run before we check arguments and set suidscript?
4245 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4246 * (We never have suidscript, can we be sure to have fdscript?)
4247 * Or must then go by UID checks? See comments in forbid_setid also.
4251 /* This is used very early in the lifetime of the program,
4252 * before even the options are parsed, so PL_tainting has
4253 * not been initialized properly. */
4255 Perl_doing_taint(int argc, char *argv[], char *envp[])
4257 #ifndef PERL_IMPLICIT_SYS
4258 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4259 * before we have an interpreter-- and the whole point of this
4260 * function is to be called at such an early stage. If you are on
4261 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4262 * "tainted because running with altered effective ids', you'll
4263 * have to add your own checks somewhere in here. The two most
4264 * known samples of 'implicitness' are Win32 and NetWare, neither
4265 * of which has much of concept of 'uids'. */
4266 int uid = PerlProc_getuid();
4267 int euid = PerlProc_geteuid();
4268 int gid = PerlProc_getgid();
4269 int egid = PerlProc_getegid();
4276 if (uid && (euid != uid || egid != gid))
4278 #endif /* !PERL_IMPLICIT_SYS */
4279 /* This is a really primitive check; environment gets ignored only
4280 * if -T are the first chars together; otherwise one gets
4281 * "Too late" message. */
4282 if ( argc > 1 && argv[1][0] == '-'
4283 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4289 S_forbid_setid(pTHX_ const char *s)
4291 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4292 if (PL_euid != PL_uid)
4293 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4294 if (PL_egid != PL_gid)
4295 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4296 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4298 * Checks for UID/GID above "wrong": why disallow
4299 * perl -e 'print "Hello\n"'
4300 * from within setuid things?? Simply drop them: replaced by
4301 * fdscript/suidscript and #ifdef IAMSUID checks below.
4303 * This may be too late for command-line switches. Will catch those on
4304 * the #! line, after finding the script name and setting up
4305 * fdscript/suidscript. Note that suidperl does not get around to
4306 * parsing (and checking) the switches on the #! line, but checks that
4307 * the two sets are identical.
4309 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4310 * instead, or would that be "too late"? (We never have suidscript, can
4311 * we be sure to have fdscript?)
4313 * Catch things with suidscript (in descendant of suidperl), even with
4314 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4315 * below; but I am paranoid.
4317 * Also see comments about root running a setuid script, elsewhere.
4319 if (PL_suidscript >= 0)
4320 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4322 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4323 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4324 #endif /* IAMSUID */
4328 Perl_init_debugger(pTHX)
4330 HV *ostash = PL_curstash;
4332 PL_curstash = PL_debstash;
4333 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4334 AvREAL_off(PL_dbargs);
4335 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4336 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4337 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4338 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4339 sv_setiv(PL_DBsingle, 0);
4340 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4341 sv_setiv(PL_DBtrace, 0);
4342 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4343 sv_setiv(PL_DBsignal, 0);
4344 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4345 sv_setiv(PL_DBassertion, 0);
4346 PL_curstash = ostash;
4349 #ifndef STRESS_REALLOC
4350 #define REASONABLE(size) (size)
4352 #define REASONABLE(size) (1) /* unreasonable */
4356 Perl_init_stacks(pTHX)
4358 /* start with 128-item stack and 8K cxstack */
4359 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4360 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4361 PL_curstackinfo->si_type = PERLSI_MAIN;
4362 PL_curstack = PL_curstackinfo->si_stack;
4363 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4365 PL_stack_base = AvARRAY(PL_curstack);
4366 PL_stack_sp = PL_stack_base;
4367 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4369 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4372 PL_tmps_max = REASONABLE(128);
4374 Newx(PL_markstack,REASONABLE(32),I32);
4375 PL_markstack_ptr = PL_markstack;
4376 PL_markstack_max = PL_markstack + REASONABLE(32);
4380 Newx(PL_scopestack,REASONABLE(32),I32);
4381 PL_scopestack_ix = 0;
4382 PL_scopestack_max = REASONABLE(32);
4384 Newx(PL_savestack,REASONABLE(128),ANY);
4385 PL_savestack_ix = 0;
4386 PL_savestack_max = REASONABLE(128);
4394 while (PL_curstackinfo->si_next)
4395 PL_curstackinfo = PL_curstackinfo->si_next;
4396 while (PL_curstackinfo) {
4397 PERL_SI *p = PL_curstackinfo->si_prev;
4398 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4399 Safefree(PL_curstackinfo->si_cxstack);
4400 Safefree(PL_curstackinfo);
4401 PL_curstackinfo = p;
4403 Safefree(PL_tmps_stack);
4404 Safefree(PL_markstack);
4405 Safefree(PL_scopestack);
4406 Safefree(PL_savestack);
4415 lex_start(PL_linestr);
4417 PL_subname = newSVpvn("main",4);
4421 S_init_predump_symbols(pTHX)
4426 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4427 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4428 GvMULTI_on(PL_stdingv);
4429 io = GvIOp(PL_stdingv);
4430 IoTYPE(io) = IoTYPE_RDONLY;
4431 IoIFP(io) = PerlIO_stdin();
4432 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4434 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4436 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4439 IoTYPE(io) = IoTYPE_WRONLY;
4440 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4442 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4444 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4446 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4447 GvMULTI_on(PL_stderrgv);
4448 io = GvIOp(PL_stderrgv);
4449 IoTYPE(io) = IoTYPE_WRONLY;
4450 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4451 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4453 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4455 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4457 Safefree(PL_osname);
4458 PL_osname = savepv(OSNAME);
4462 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4464 argc--,argv++; /* skip name of script */
4465 if (PL_doswitches) {
4466 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4470 if (argv[0][1] == '-' && !argv[0][2]) {
4474 if ((s = strchr(argv[0], '='))) {
4476 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4479 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4482 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4483 GvMULTI_on(PL_argvgv);
4484 (void)gv_AVadd(PL_argvgv);
4485 av_clear(GvAVn(PL_argvgv));
4486 for (; argc > 0; argc--,argv++) {
4487 SV * const sv = newSVpv(argv[0],0);
4488 av_push(GvAVn(PL_argvgv),sv);
4489 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4490 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4493 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4494 (void)sv_utf8_decode(sv);
4500 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4505 PL_toptarget = NEWSV(0,0);
4506 sv_upgrade(PL_toptarget, SVt_PVFM);
4507 sv_setpvn(PL_toptarget, "", 0);
4508 PL_bodytarget = NEWSV(0,0);
4509 sv_upgrade(PL_bodytarget, SVt_PVFM);
4510 sv_setpvn(PL_bodytarget, "", 0);
4511 PL_formtarget = PL_bodytarget;
4515 init_argv_symbols(argc,argv);
4517 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4518 #ifdef MACOS_TRADITIONAL
4519 /* $0 is not majick on a Mac */
4520 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4522 sv_setpv(GvSV(tmpgv),PL_origfilename);
4523 magicname("0", "0", 1);
4526 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4528 GvMULTI_on(PL_envgv);
4529 hv = GvHVn(PL_envgv);
4530 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4532 #ifdef USE_ENVIRON_ARRAY
4533 /* Note that if the supplied env parameter is actually a copy
4534 of the global environ then it may now point to free'd memory
4535 if the environment has been modified since. To avoid this
4536 problem we treat env==NULL as meaning 'use the default'
4541 # ifdef USE_ITHREADS
4542 && PL_curinterp == aTHX
4546 environ[0] = Nullch;
4549 char** origenv = environ;
4552 for (; *env; env++) {
4553 if (!(s = strchr(*env,'=')) || s == *env)
4555 #if defined(MSDOS) && !defined(DJGPP)
4560 sv = newSVpv(s+1, 0);
4561 (void)hv_store(hv, *env, s - *env, sv, 0);
4564 if (origenv != environ) {
4565 /* realloc has shifted us */
4566 env = (env - origenv) + environ;
4571 #endif /* USE_ENVIRON_ARRAY */
4572 #endif /* !PERL_MICRO */
4575 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4576 SvREADONLY_off(GvSV(tmpgv));
4577 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4578 SvREADONLY_on(GvSV(tmpgv));
4580 #ifdef THREADS_HAVE_PIDS
4581 PL_ppid = (IV)getppid();
4584 /* touch @F array to prevent spurious warnings 20020415 MJD */
4586 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4588 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4589 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4590 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4594 S_init_perllib(pTHX)
4599 s = PerlEnv_getenv("PERL5LIB");
4601 * It isn't possible to delete an environment variable with
4602 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4603 * case we treat PERL5LIB as undefined if it has a zero-length value.
4605 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4606 if (s && *s != '\0')
4610 incpush(s, TRUE, TRUE, TRUE, FALSE);
4612 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4614 /* Treat PERL5?LIB as a possible search list logical name -- the
4615 * "natural" VMS idiom for a Unix path string. We allow each
4616 * element to be a set of |-separated directories for compatibility.
4620 if (my_trnlnm("PERL5LIB",buf,0))
4621 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4623 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4627 /* Use the ~-expanded versions of APPLLIB (undocumented),
4628 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4631 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4635 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4637 #ifdef MACOS_TRADITIONAL
4640 SV * privdir = NEWSV(55, 0);
4641 char * macperl = PerlEnv_getenv("MACPERL");
4646 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4647 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4648 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4649 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4650 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4651 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4653 SvREFCNT_dec(privdir);
4656 incpush(":", FALSE, FALSE, TRUE, FALSE);
4659 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4662 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4664 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4668 /* sitearch is always relative to sitelib on Windows for
4669 * DLL-based path intuition to work correctly */
4670 # if !defined(WIN32)
4671 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4677 /* this picks up sitearch as well */
4678 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4680 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4684 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4685 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4688 #ifdef PERL_VENDORARCH_EXP
4689 /* vendorarch is always relative to vendorlib on Windows for
4690 * DLL-based path intuition to work correctly */
4691 # if !defined(WIN32)
4692 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4696 #ifdef PERL_VENDORLIB_EXP
4698 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4700 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4704 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4705 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4708 #ifdef PERL_OTHERLIBDIRS
4709 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4713 incpush(".", FALSE, FALSE, TRUE, FALSE);
4714 #endif /* MACOS_TRADITIONAL */
4717 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4718 # define PERLLIB_SEP ';'
4721 # define PERLLIB_SEP '|'
4723 # if defined(MACOS_TRADITIONAL)
4724 # define PERLLIB_SEP ','
4726 # define PERLLIB_SEP ':'
4730 #ifndef PERLLIB_MANGLE
4731 # define PERLLIB_MANGLE(s,n) (s)
4734 /* Push a directory onto @INC if it exists.
4735 Generate a new SV if we do this, to save needing to copy the SV we push
4738 S_incpush_if_exists(pTHX_ SV *dir)
4741 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4742 S_ISDIR(tmpstatbuf.st_mode)) {
4743 av_push(GvAVn(PL_incgv), dir);
4750 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4753 SV *subdir = Nullsv;
4754 const char *p = dir;
4759 if (addsubdirs || addoldvers) {
4760 subdir = NEWSV(0,0);
4763 /* Break at all separators */
4765 SV *libdir = NEWSV(55,0);
4768 /* skip any consecutive separators */
4770 while ( *p == PERLLIB_SEP ) {
4771 /* Uncomment the next line for PATH semantics */
4772 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4777 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4778 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4783 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4784 p = Nullch; /* break out */
4786 #ifdef MACOS_TRADITIONAL
4787 if (!strchr(SvPVX(libdir), ':')) {
4790 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4792 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4793 sv_catpv(libdir, ":");
4796 /* Do the if() outside the #ifdef to avoid warnings about an unused
4799 #ifdef PERL_RELOCATABLE_INC
4801 * Relocatable include entries are marked with a leading .../
4804 * 0: Remove that leading ".../"
4805 * 1: Remove trailing executable name (anything after the last '/')
4806 * from the perl path to give a perl prefix
4808 * While the @INC element starts "../" and the prefix ends with a real
4809 * directory (ie not . or ..) chop that real directory off the prefix
4810 * and the leading "../" from the @INC element. ie a logical "../"
4812 * Finally concatenate the prefix and the remainder of the @INC element
4813 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4814 * generates /usr/local/lib/perl5
4816 const char *libpath = SvPVX(libdir);
4817 STRLEN libpath_len = SvCUR(libdir);
4818 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4820 SV * const caret_X = get_sv("\030", 0);
4821 /* Going to use the SV just as a scratch buffer holding a C
4827 /* $^X is *the* source of taint if tainting is on, hence
4828 SvPOK() won't be true. */
4830 assert(SvPOKp(caret_X));
4831 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4832 /* Firstly take off the leading .../
4833 If all else fail we'll do the paths relative to the current
4835 sv_chop(libdir, libpath + 4);
4836 /* Don't use SvPV as we're intentionally bypassing taining,
4837 mortal copies that the mg_get of tainting creates, and
4838 corruption that seems to come via the save stack.
4839 I guess that the save stack isn't correctly set up yet. */
4840 libpath = SvPVX(libdir);
4841 libpath_len = SvCUR(libdir);
4843 /* This would work more efficiently with memrchr, but as it's
4844 only a GNU extension we'd need to probe for it and
4845 implement our own. Not hard, but maybe not worth it? */
4847 prefix = SvPVX(prefix_sv);
4848 lastslash = strrchr(prefix, '/');
4850 /* First time in with the *lastslash = '\0' we just wipe off
4851 the trailing /perl from (say) /usr/foo/bin/perl
4855 while ((*lastslash = '\0'), /* Do that, come what may. */
4856 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4857 && (lastslash = strrchr(prefix, '/')))) {
4858 if (lastslash[1] == '\0'
4859 || (lastslash[1] == '.'
4860 && (lastslash[2] == '/' /* ends "/." */
4861 || (lastslash[2] == '/'
4862 && lastslash[3] == '/' /* or "/.." */
4864 /* Prefix ends "/" or "/." or "/..", any of which
4865 are fishy, so don't do any more logical cleanup.
4869 /* Remove leading "../" from path */
4872 /* Next iteration round the loop removes the last
4873 directory name from prefix by writing a '\0' in
4874 the while clause. */
4876 /* prefix has been terminated with a '\0' to the correct
4877 length. libpath points somewhere into the libdir SV.
4878 We need to join the 2 with '/' and drop the result into
4880 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4881 SvREFCNT_dec(libdir);
4882 /* And this is the new libdir. */
4885 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4886 /* Need to taint reloccated paths if running set ID */
4887 SvTAINTED_on(libdir);
4890 SvREFCNT_dec(prefix_sv);
4895 * BEFORE pushing libdir onto @INC we may first push version- and
4896 * archname-specific sub-directories.
4898 if (addsubdirs || addoldvers) {
4899 #ifdef PERL_INC_VERSION_LIST
4900 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4901 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4902 const char **incver;
4908 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4910 while (unix[len-1] == '/') len--; /* Cosmetic */
4911 sv_usepvn(libdir,unix,len);
4914 PerlIO_printf(Perl_error_log,
4915 "Failed to unixify @INC element \"%s\"\n",
4919 #ifdef MACOS_TRADITIONAL
4920 #define PERL_AV_SUFFIX_FMT ""
4921 #define PERL_ARCH_FMT "%s:"
4922 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4924 #define PERL_AV_SUFFIX_FMT "/"
4925 #define PERL_ARCH_FMT "/%s"
4926 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4928 /* .../version/archname if -d .../version/archname */
4929 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4931 (int)PERL_REVISION, (int)PERL_VERSION,
4932 (int)PERL_SUBVERSION, ARCHNAME);
4933 subdir = S_incpush_if_exists(aTHX_ subdir);
4935 /* .../version if -d .../version */
4936 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4937 (int)PERL_REVISION, (int)PERL_VERSION,
4938 (int)PERL_SUBVERSION);
4939 subdir = S_incpush_if_exists(aTHX_ subdir);
4941 /* .../archname if -d .../archname */
4942 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4943 subdir = S_incpush_if_exists(aTHX_ subdir);
4947 #ifdef PERL_INC_VERSION_LIST
4949 for (incver = incverlist; *incver; incver++) {
4950 /* .../xxx if -d .../xxx */
4951 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4952 subdir = S_incpush_if_exists(aTHX_ subdir);
4958 /* finally push this lib directory on the end of @INC */
4959 av_push(GvAVn(PL_incgv), libdir);
4962 assert (SvREFCNT(subdir) == 1);
4963 SvREFCNT_dec(subdir);
4967 #ifdef USE_5005THREADS
4968 STATIC struct perl_thread *
4969 S_init_main_thread(pTHX)
4971 #if !defined(PERL_IMPLICIT_CONTEXT)
4972 struct perl_thread *thr;
4976 Newxz(thr, 1, struct perl_thread);
4977 PL_curcop = &PL_compiling;
4978 thr->interp = PERL_GET_INTERP;
4979 thr->cvcache = newHV();
4980 thr->threadsv = newAV();
4981 /* thr->threadsvp is set when find_threadsv is called */
4982 thr->specific = newAV();
4983 thr->flags = THRf_R_JOINABLE;
4984 MUTEX_INIT(&thr->mutex);
4985 /* Handcraft thrsv similarly to mess_sv */
4986 Newx(PL_thrsv, 1, SV);
4988 SvFLAGS(PL_thrsv) = SVt_PV;
4989 SvANY(PL_thrsv) = (void*)xpv;
4990 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4991 SvPV_set(PL_thrsvr, (char*)thr);
4992 SvCUR_set(PL_thrsv, sizeof(thr));
4993 SvLEN_set(PL_thrsv, sizeof(thr));
4994 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4995 thr->oursv = PL_thrsv;
4996 PL_chopset = " \n-";
4999 MUTEX_LOCK(&PL_threads_mutex);
5005 MUTEX_UNLOCK(&PL_threads_mutex);
5007 #ifdef HAVE_THREAD_INTERN
5008 Perl_init_thread_intern(thr);
5011 #ifdef SET_THREAD_SELF
5012 SET_THREAD_SELF(thr);
5014 thr->self = pthread_self();
5015 #endif /* SET_THREAD_SELF */
5019 * These must come after the thread self setting
5020 * because sv_setpvn does SvTAINT and the taint
5021 * fields thread selfness being set.
5023 PL_toptarget = NEWSV(0,0);
5024 sv_upgrade(PL_toptarget, SVt_PVFM);
5025 sv_setpvn(PL_toptarget, "", 0);
5026 PL_bodytarget = NEWSV(0,0);
5027 sv_upgrade(PL_bodytarget, SVt_PVFM);
5028 sv_setpvn(PL_bodytarget, "", 0);
5029 PL_formtarget = PL_bodytarget;
5030 thr->errsv = newSVpvn("", 0);
5031 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5034 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5035 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5036 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5037 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5038 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5039 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5041 PL_reginterp_cnt = 0;
5045 #endif /* USE_5005THREADS */
5048 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5052 const line_t oldline = CopLINE(PL_curcop);
5058 while (av_len(paramList) >= 0) {
5059 cv = (CV*)av_shift(paramList);
5061 if (paramList == PL_beginav) {
5062 /* save PL_beginav for compiler */
5063 if (! PL_beginav_save)
5064 PL_beginav_save = newAV();
5065 av_push(PL_beginav_save, (SV*)cv);
5067 else if (paramList == PL_checkav) {
5068 /* save PL_checkav for compiler */
5069 if (! PL_checkav_save)
5070 PL_checkav_save = newAV();
5071 av_push(PL_checkav_save, (SV*)cv);
5081 (void)SvPV_const(atsv, len);
5083 PL_curcop = &PL_compiling;
5084 CopLINE_set(PL_curcop, oldline);
5085 if (paramList == PL_beginav)
5086 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5088 Perl_sv_catpvf(aTHX_ atsv,
5089 "%s failed--call queue aborted",
5090 paramList == PL_checkav ? "CHECK"
5091 : paramList == PL_initav ? "INIT"
5093 while (PL_scopestack_ix > oldscope)
5096 Perl_croak(aTHX_ "%"SVf"", atsv);
5103 /* my_exit() was called */
5104 while (PL_scopestack_ix > oldscope)
5107 PL_curstash = PL_defstash;
5108 PL_curcop = &PL_compiling;
5109 CopLINE_set(PL_curcop, oldline);
5111 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5112 if (paramList == PL_beginav)
5113 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5115 Perl_croak(aTHX_ "%s failed--call queue aborted",
5116 paramList == PL_checkav ? "CHECK"
5117 : paramList == PL_initav ? "INIT"
5124 PL_curcop = &PL_compiling;
5125 CopLINE_set(PL_curcop, oldline);
5128 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5137 S_call_list_body(pTHX_ CV *cv)
5139 PUSHMARK(PL_stack_sp);
5140 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5145 Perl_my_exit(pTHX_ U32 status)
5147 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5148 thr, (unsigned long) status));
5157 STATUS_UNIX_EXIT_SET(status);
5164 Perl_my_failure_exit(pTHX)
5167 /* We have been called to fall on our sword. The desired exit code
5168 * should be already set in STATUS_UNIX, but could be shifted over
5169 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5172 * If an error code has not been set, then force the issue.
5174 if (MY_POSIX_EXIT) {
5176 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5177 * the exit code when there isn't an error.
5180 if (STATUS_UNIX == 0)
5181 STATUS_UNIX_EXIT_SET(255);
5183 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5185 /* The exit code could have been set by $? or vmsish which
5186 * means that it may not be fatal. So convert
5187 * success/warning codes to fatal.
5189 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5190 STATUS_UNIX_EXIT_SET(255);
5194 /* Traditionally Perl on VMS always expects a Fatal Error. */
5195 if (vaxc$errno & 1) {
5197 /* So force success status to failure */
5198 if (STATUS_NATIVE & 1)
5203 STATUS_UNIX = EINTR; /* In case something cares */
5208 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5210 /* Encode the severity code */
5211 severity = STATUS_NATIVE & STS$M_SEVERITY;
5212 STATUS_UNIX = (severity ? severity : 1) << 8;
5214 /* Perl expects this to be a fatal error */
5215 if (severity != STS$K_SEVERE)
5224 STATUS_UNIX_SET(errno);
5226 exitstatus = STATUS_UNIX >> 8;
5227 if (exitstatus & 255)
5228 STATUS_UNIX_SET(exitstatus);
5230 STATUS_UNIX_SET(255);
5237 S_my_exit_jump(pTHX)
5240 register PERL_CONTEXT *cx;
5245 SvREFCNT_dec(PL_e_script);
5246 PL_e_script = Nullsv;
5249 POPSTACK_TO(PL_mainstack);
5250 if (cxstack_ix >= 0) {
5253 POPBLOCK(cx,PL_curpm);
5258 PERL_UNUSED_VAR(gimme);
5259 PERL_UNUSED_VAR(newsp);
5263 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5265 const char * const p = SvPVX_const(PL_e_script);
5266 const char *nl = strchr(p, '\n');
5268 PERL_UNUSED_ARG(idx);
5269 PERL_UNUSED_ARG(maxlen);
5271 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5273 filter_del(read_e_script);
5276 sv_catpvn(buf_sv, p, nl-p);
5277 sv_chop(PL_e_script, nl);
5283 * c-indentation-style: bsd
5285 * indent-tabs-mode: t
5288 * ex: set ts=8 sts=4 sw=4 noet: