3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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 /* This reference ensures that the mathoms are linked with perl */
142 extern void Perl_mathoms(void);
143 void Perl_mathoms_ref(void);
144 void Perl_mathoms_ref(void) {
150 S_init_tls_and_interp(PerlInterpreter *my_perl)
154 PERL_SET_INTERP(my_perl);
155 #if defined(USE_ITHREADS)
158 PERL_SET_THX(my_perl);
160 MUTEX_INIT(&PL_dollarzero_mutex);
162 #ifdef PERL_IMPLICIT_CONTEXT
163 MUTEX_INIT(&PL_my_ctx_mutex);
167 PERL_SET_THX(my_perl);
171 #ifdef PERL_IMPLICIT_SYS
173 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
174 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
175 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
176 struct IPerlDir* ipD, struct IPerlSock* ipS,
177 struct IPerlProc* ipP)
179 PerlInterpreter *my_perl;
180 /* Newx() needs interpreter, so call malloc() instead */
181 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
182 S_init_tls_and_interp(my_perl);
183 Zero(my_perl, 1, PerlInterpreter);
199 =head1 Embedding Functions
201 =for apidoc perl_alloc
203 Allocates a new Perl interpreter. See L<perlembed>.
211 PerlInterpreter *my_perl;
213 /* Newx() needs interpreter, so call malloc() instead */
214 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
216 S_init_tls_and_interp(my_perl);
217 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
219 #endif /* PERL_IMPLICIT_SYS */
222 =for apidoc perl_construct
224 Initializes a new Perl interpreter. See L<perlembed>.
230 perl_construct(pTHXx)
233 PERL_UNUSED_ARG(my_perl);
236 PL_perl_destruct_level = 1;
238 if (PL_perl_destruct_level > 0)
241 /* Init the real globals (and main thread)? */
243 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
245 PL_linestr = newSV(79);
246 sv_upgrade(PL_linestr,SVt_PVIV);
248 if (!SvREADONLY(&PL_sv_undef)) {
249 /* set read-only and try to insure than we wont see REFCNT==0
252 SvREADONLY_on(&PL_sv_undef);
253 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
255 sv_setpv(&PL_sv_no,PL_No);
256 /* value lookup in void context - happens to have the side effect
257 of caching the numeric forms. */
260 SvREADONLY_on(&PL_sv_no);
261 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
263 sv_setpv(&PL_sv_yes,PL_Yes);
266 SvREADONLY_on(&PL_sv_yes);
267 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
269 SvREADONLY_on(&PL_sv_placeholder);
270 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
273 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
274 #ifdef PERL_USES_PL_PIDSTATUS
275 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
284 PL_lex_state = LEX_NOTPARSING;
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
306 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
307 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
309 PL_regex_padav = newAV();
310 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
350 (int)PERL_VERSION, (int)PERL_SUBVERSION);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 (void) SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
398 =for apidoc nothreadhook
400 Stub that provides thread hook for perl_destruct when there are
407 Perl_nothreadhook(pTHX)
412 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
414 Perl_dump_sv_child(pTHX_ SV *sv)
417 const int sock = PL_dumper_fd;
418 const int debug_fd = PerlIO_fileno(Perl_debug_log);
419 union control_un control;
422 struct cmsghdr *cmptr;
424 unsigned char buffer[256];
426 if(sock == -1 || debug_fd == -1)
429 PerlIO_flush(Perl_debug_log);
431 /* All these shenanigans are to pass a file descriptor over to our child for
432 it to dump out to. We can't let it hold open the file descriptor when it
433 forks, as the file descriptor it will dump to can turn out to be one end
434 of pipe that some other process will wait on for EOF. (So as it would
435 be open, the wait would be forever. */
437 msg.msg_control = control.control;
438 msg.msg_controllen = sizeof(control.control);
439 /* We're a connected socket so we don't need a destination */
445 cmptr = CMSG_FIRSTHDR(&msg);
446 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
447 cmptr->cmsg_level = SOL_SOCKET;
448 cmptr->cmsg_type = SCM_RIGHTS;
449 *((int *)CMSG_DATA(cmptr)) = 1;
451 vec[0].iov_base = (void*)&sv;
452 vec[0].iov_len = sizeof(sv);
453 got = sendmsg(sock, &msg, 0);
456 perror("Debug leaking scalars parent sendmsg failed");
459 if(got < sizeof(sv)) {
460 perror("Debug leaking scalars parent short sendmsg");
464 /* Return protocol is
466 unsigned char: length of location string (0 for empty)
467 unsigned char*: string (not terminated)
469 vec[0].iov_base = (void*)&returned_errno;
470 vec[0].iov_len = sizeof(returned_errno);
471 vec[1].iov_base = buffer;
474 got = readv(sock, vec, 2);
477 perror("Debug leaking scalars parent read failed");
478 PerlIO_flush(PerlIO_stderr());
481 if(got < sizeof(returned_errno) + 1) {
482 perror("Debug leaking scalars parent short read");
483 PerlIO_flush(PerlIO_stderr());
488 got = read(sock, buffer + 1, *buffer);
490 perror("Debug leaking scalars parent read 2 failed");
491 PerlIO_flush(PerlIO_stderr());
496 perror("Debug leaking scalars parent short read 2");
497 PerlIO_flush(PerlIO_stderr());
502 if (returned_errno || *buffer) {
503 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
504 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
505 returned_errno, strerror(returned_errno));
511 =for apidoc perl_destruct
513 Shuts down a Perl interpreter. See L<perlembed>.
522 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
524 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
528 PERL_UNUSED_ARG(my_perl);
530 /* wait for all pseudo-forked children to finish */
531 PERL_WAIT_FOR_CHILDREN;
533 destruct_level = PL_perl_destruct_level;
536 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
538 const int i = atoi(s);
539 if (destruct_level < i)
545 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
551 if (PL_endav && !PL_minus_c)
552 call_list(PL_scopestack_ix, PL_endav);
558 /* Need to flush since END blocks can produce output */
561 if (CALL_FPTR(PL_threadhook)(aTHX)) {
562 /* Threads hook has vetoed further cleanup */
566 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
567 if (destruct_level != 0) {
568 /* Fork here to create a child. Our child's job is to preserve the
569 state of scalars prior to destruction, so that we can instruct it
570 to dump any scalars that we later find have leaked.
571 There's no subtlety in this code - it assumes POSIX, and it doesn't
575 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
576 perror("Debug leaking scalars socketpair failed");
582 perror("Debug leaking scalars fork failed");
586 /* We are the child */
587 const int sock = fd[1];
588 const int debug_fd = PerlIO_fileno(Perl_debug_log);
591 /* Our success message is an integer 0, and a char 0 */
592 static const char success[sizeof(int) + 1];
596 /* We need to close all other file descriptors otherwise we end up
597 with interesting hangs, where the parent closes its end of a
598 pipe, and sits waiting for (another) child to terminate. Only
599 that child never terminates, because it never gets EOF, because
600 we also have the far end of the pipe open. We even need to
601 close the debugging fd, because sometimes it happens to be one
602 end of a pipe, and a process is waiting on the other end for
603 EOF. Normally it would be closed at some point earlier in
604 destruction, but if we happen to cause the pipe to remain open,
605 EOF never occurs, and we get an infinite hang. Hence all the
606 games to pass in a file descriptor if it's actually needed. */
608 f = sysconf(_SC_OPEN_MAX);
610 where = "sysconf failed";
621 union control_un control;
624 struct cmsghdr *cmptr;
628 msg.msg_control = control.control;
629 msg.msg_controllen = sizeof(control.control);
630 /* We're a connected socket so we don't need a source */
634 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
636 vec[0].iov_base = (void*)⌖
637 vec[0].iov_len = sizeof(target);
639 got = recvmsg(sock, &msg, 0);
644 where = "recv failed";
647 if(got < sizeof(target)) {
648 where = "short recv";
652 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
656 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
657 where = "wrong cmsg_len";
660 if(cmptr->cmsg_level != SOL_SOCKET) {
661 where = "wrong cmsg_level";
664 if(cmptr->cmsg_type != SCM_RIGHTS) {
665 where = "wrong cmsg_type";
669 got_fd = *(int*)CMSG_DATA(cmptr);
670 /* For our last little bit of trickery, put the file descriptor
671 back into Perl_debug_log, as if we never actually closed it
673 if(got_fd != debug_fd) {
674 if (dup2(got_fd, debug_fd) == -1) {
681 PerlIO_flush(Perl_debug_log);
683 got = write(sock, &success, sizeof(success));
686 where = "write failed";
689 if(got < sizeof(success)) {
690 where = "short write";
697 int send_errno = errno;
698 unsigned char length = (unsigned char) strlen(where);
699 struct iovec failure[3] = {
700 {(void*)&send_errno, sizeof(send_errno)},
702 {(void*)where, length}
704 int got = writev(sock, failure, 3);
705 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
706 in the parent if we try to read from the socketpair after the
707 child has exited, even if there was data to read.
708 So sleep a bit to give the parent a fighting chance of
711 _exit((got == -1) ? errno : 0);
715 PL_dumper_fd = fd[0];
720 /* We must account for everything. */
722 /* Destroy the main CV and syntax tree */
723 /* Do this now, because destroying ops can cause new SVs to be generated
724 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
725 PL_curcop to point to a valid op from which the filename structure
727 PL_curcop = &PL_compiling;
729 /* ensure comppad/curpad to refer to main's pad */
730 if (CvPADLIST(PL_main_cv)) {
731 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
733 op_free(PL_main_root);
734 PL_main_root = Nullop;
736 PL_main_start = Nullop;
737 SvREFCNT_dec(PL_main_cv);
741 /* Tell PerlIO we are about to tear things apart in case
742 we have layers which are using resources that should
746 PerlIO_destruct(aTHX);
748 if (PL_sv_objcount) {
750 * Try to destruct global references. We do this first so that the
751 * destructors and destructees still exist. Some sv's might remain.
752 * Non-referenced objects are on their own.
756 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
757 PL_defoutgv = Nullgv; /* may have been freed */
760 /* unhook hooks which will soon be, or use, destroyed data */
761 SvREFCNT_dec(PL_warnhook);
762 PL_warnhook = Nullsv;
763 SvREFCNT_dec(PL_diehook);
766 /* call exit list functions */
767 while (PL_exitlistlen-- > 0)
768 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
770 Safefree(PL_exitlist);
775 if (destruct_level == 0){
777 DEBUG_P(debprofdump());
779 #if defined(PERLIO_LAYERS)
780 /* No more IO - including error messages ! */
781 PerlIO_cleanup(aTHX);
784 /* The exit() function will do everything that needs doing. */
788 /* jettison our possibly duplicated environment */
789 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
790 * so we certainly shouldn't free it here
793 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
794 if (environ != PL_origenviron && !PL_use_safe_putenv
796 /* only main thread can free environ[0] contents */
797 && PL_curinterp == aTHX
803 for (i = 0; environ[i]; i++)
804 safesysfree(environ[i]);
806 /* Must use safesysfree() when working with environ. */
807 safesysfree(environ);
809 environ = PL_origenviron;
812 #endif /* !PERL_MICRO */
814 /* reset so print() ends up where we expect */
818 /* the syntax tree is shared between clones
819 * so op_free(PL_main_root) only ReREFCNT_dec's
820 * REGEXPs in the parent interpreter
821 * we need to manually ReREFCNT_dec for the clones
824 I32 i = AvFILLp(PL_regex_padav) + 1;
825 SV * const * const ary = AvARRAY(PL_regex_padav);
828 SV * const resv = ary[--i];
830 if (SvFLAGS(resv) & SVf_BREAK) {
831 /* this is PL_reg_curpm, already freed
832 * flag is set in regexec.c:S_regtry
834 SvFLAGS(resv) &= ~SVf_BREAK;
836 else if(SvREPADTMP(resv)) {
837 SvREPADTMP_off(resv);
839 else if(SvIOKp(resv)) {
840 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
845 SvREFCNT_dec(PL_regex_padav);
846 PL_regex_padav = NULL;
850 SvREFCNT_dec((SV*) PL_stashcache);
851 PL_stashcache = NULL;
853 /* loosen bonds of global variables */
856 (void)PerlIO_close(PL_rsfp);
860 /* Filters for program text */
861 SvREFCNT_dec(PL_rsfp_filters);
862 PL_rsfp_filters = NULL;
865 PL_preprocess = FALSE;
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_doextract = FALSE;
874 PL_sawampersand = FALSE; /* must save all match strings */
877 Safefree(PL_inplace);
879 SvREFCNT_dec(PL_patchlevel);
882 SvREFCNT_dec(PL_e_script);
883 PL_e_script = Nullsv;
888 /* magical thingies */
890 SvREFCNT_dec(PL_ofs_sv); /* $, */
893 SvREFCNT_dec(PL_ors_sv); /* $\ */
896 SvREFCNT_dec(PL_rs); /* $/ */
899 PL_multiline = 0; /* $* */
900 Safefree(PL_osname); /* $^O */
903 SvREFCNT_dec(PL_statname);
904 PL_statname = Nullsv;
907 /* defgv, aka *_ should be taken care of elsewhere */
909 /* clean up after study() */
910 SvREFCNT_dec(PL_lastscream);
911 PL_lastscream = Nullsv;
912 Safefree(PL_screamfirst);
914 Safefree(PL_screamnext);
918 Safefree(PL_efloatbuf);
919 PL_efloatbuf = Nullch;
922 /* startup and shutdown function lists */
923 SvREFCNT_dec(PL_beginav);
924 SvREFCNT_dec(PL_beginav_save);
925 SvREFCNT_dec(PL_endav);
926 SvREFCNT_dec(PL_checkav);
927 SvREFCNT_dec(PL_checkav_save);
928 SvREFCNT_dec(PL_initav);
930 PL_beginav_save = NULL;
933 PL_checkav_save = NULL;
936 /* shortcuts just get cleared */
942 PL_argvoutgv = Nullgv;
944 PL_stderrgv = Nullgv;
945 PL_last_in_gv = Nullgv;
950 PL_DBsingle = Nullsv;
952 PL_DBsignal = Nullsv;
953 PL_DBassertion = Nullsv;
958 SvREFCNT_dec(PL_argvout_stack);
959 PL_argvout_stack = NULL;
961 SvREFCNT_dec(PL_modglobal);
963 SvREFCNT_dec(PL_preambleav);
964 PL_preambleav = NULL;
965 SvREFCNT_dec(PL_subname);
967 SvREFCNT_dec(PL_linestr);
969 #ifdef PERL_USES_PL_PIDSTATUS
970 SvREFCNT_dec(PL_pidstatus);
973 SvREFCNT_dec(PL_toptarget);
974 PL_toptarget = Nullsv;
975 SvREFCNT_dec(PL_bodytarget);
976 PL_bodytarget = Nullsv;
977 PL_formtarget = Nullsv;
979 /* free locale stuff */
980 #ifdef USE_LOCALE_COLLATE
981 Safefree(PL_collation_name);
982 PL_collation_name = Nullch;
985 #ifdef USE_LOCALE_NUMERIC
986 Safefree(PL_numeric_name);
987 PL_numeric_name = Nullch;
988 SvREFCNT_dec(PL_numeric_radix_sv);
989 PL_numeric_radix_sv = Nullsv;
992 /* clear utf8 character classes */
993 SvREFCNT_dec(PL_utf8_alnum);
994 SvREFCNT_dec(PL_utf8_alnumc);
995 SvREFCNT_dec(PL_utf8_ascii);
996 SvREFCNT_dec(PL_utf8_alpha);
997 SvREFCNT_dec(PL_utf8_space);
998 SvREFCNT_dec(PL_utf8_cntrl);
999 SvREFCNT_dec(PL_utf8_graph);
1000 SvREFCNT_dec(PL_utf8_digit);
1001 SvREFCNT_dec(PL_utf8_upper);
1002 SvREFCNT_dec(PL_utf8_lower);
1003 SvREFCNT_dec(PL_utf8_print);
1004 SvREFCNT_dec(PL_utf8_punct);
1005 SvREFCNT_dec(PL_utf8_xdigit);
1006 SvREFCNT_dec(PL_utf8_mark);
1007 SvREFCNT_dec(PL_utf8_toupper);
1008 SvREFCNT_dec(PL_utf8_totitle);
1009 SvREFCNT_dec(PL_utf8_tolower);
1010 SvREFCNT_dec(PL_utf8_tofold);
1011 SvREFCNT_dec(PL_utf8_idstart);
1012 SvREFCNT_dec(PL_utf8_idcont);
1013 PL_utf8_alnum = Nullsv;
1014 PL_utf8_alnumc = Nullsv;
1015 PL_utf8_ascii = Nullsv;
1016 PL_utf8_alpha = Nullsv;
1017 PL_utf8_space = Nullsv;
1018 PL_utf8_cntrl = Nullsv;
1019 PL_utf8_graph = Nullsv;
1020 PL_utf8_digit = Nullsv;
1021 PL_utf8_upper = Nullsv;
1022 PL_utf8_lower = Nullsv;
1023 PL_utf8_print = Nullsv;
1024 PL_utf8_punct = Nullsv;
1025 PL_utf8_xdigit = Nullsv;
1026 PL_utf8_mark = Nullsv;
1027 PL_utf8_toupper = Nullsv;
1028 PL_utf8_totitle = Nullsv;
1029 PL_utf8_tolower = Nullsv;
1030 PL_utf8_tofold = Nullsv;
1031 PL_utf8_idstart = Nullsv;
1032 PL_utf8_idcont = Nullsv;
1034 if (!specialWARN(PL_compiling.cop_warnings))
1035 SvREFCNT_dec(PL_compiling.cop_warnings);
1036 PL_compiling.cop_warnings = Nullsv;
1037 if (!specialCopIO(PL_compiling.cop_io))
1038 SvREFCNT_dec(PL_compiling.cop_io);
1039 PL_compiling.cop_io = Nullsv;
1040 CopFILE_free(&PL_compiling);
1041 CopSTASH_free(&PL_compiling);
1043 /* Prepare to destruct main symbol table. */
1048 SvREFCNT_dec(PL_curstname);
1049 PL_curstname = Nullsv;
1051 /* clear queued errors */
1052 SvREFCNT_dec(PL_errors);
1056 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1057 if (PL_scopestack_ix != 0)
1058 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1059 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1060 (long)PL_scopestack_ix);
1061 if (PL_savestack_ix != 0)
1062 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1063 "Unbalanced saves: %ld more saves than restores\n",
1064 (long)PL_savestack_ix);
1065 if (PL_tmps_floor != -1)
1066 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1067 (long)PL_tmps_floor + 1);
1068 if (cxstack_ix != -1)
1069 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1070 (long)cxstack_ix + 1);
1073 /* Now absolutely destruct everything, somehow or other, loops or no. */
1074 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1075 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1077 /* the 2 is for PL_fdpid and PL_strtab */
1078 while (PL_sv_count > 2 && sv_clean_all())
1081 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1082 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1083 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1084 SvFLAGS(PL_strtab) |= SVt_PVHV;
1086 AvREAL_off(PL_fdpid); /* no surviving entries */
1087 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1090 #ifdef HAVE_INTERP_INTERN
1094 /* Destruct the global string table. */
1096 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1097 * so that sv_free() won't fail on them.
1098 * Now that the global string table is using a single hunk of memory
1099 * for both HE and HEK, we either need to explicitly unshare it the
1100 * correct way, or actually free things here.
1103 const I32 max = HvMAX(PL_strtab);
1104 HE * const * const array = HvARRAY(PL_strtab);
1105 HE *hent = array[0];
1108 if (hent && ckWARN_d(WARN_INTERNAL)) {
1109 HE * const next = HeNEXT(hent);
1110 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1111 "Unbalanced string table refcount: (%ld) for \"%s\"",
1112 (long)(HeVAL(hent) - Nullsv), HeKEY(hent));
1119 hent = array[riter];
1124 HvARRAY(PL_strtab) = 0;
1125 HvTOTALKEYS(PL_strtab) = 0;
1126 HvFILL(PL_strtab) = 0;
1128 SvREFCNT_dec(PL_strtab);
1131 /* free the pointer tables used for cloning */
1132 ptr_table_free(PL_ptr_table);
1133 PL_ptr_table = (PTR_TBL_t*)NULL;
1136 /* free special SVs */
1138 SvREFCNT(&PL_sv_yes) = 0;
1139 sv_clear(&PL_sv_yes);
1140 SvANY(&PL_sv_yes) = NULL;
1141 SvFLAGS(&PL_sv_yes) = 0;
1143 SvREFCNT(&PL_sv_no) = 0;
1144 sv_clear(&PL_sv_no);
1145 SvANY(&PL_sv_no) = NULL;
1146 SvFLAGS(&PL_sv_no) = 0;
1150 for (i=0; i<=2; i++) {
1151 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1152 sv_clear(PERL_DEBUG_PAD(i));
1153 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1154 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1158 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1159 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1161 #ifdef DEBUG_LEAKING_SCALARS
1162 if (PL_sv_count != 0) {
1167 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1168 svend = &sva[SvREFCNT(sva)];
1169 for (sv = sva + 1; sv < svend; ++sv) {
1170 if (SvTYPE(sv) != SVTYPEMASK) {
1171 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1173 " refcnt=%"UVuf pTHX__FORMAT "\n"
1174 "\tallocated at %s:%d %s %s%s\n",
1175 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1176 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1178 sv->sv_debug_inpad ? "for" : "by",
1179 sv->sv_debug_optype ?
1180 PL_op_name[sv->sv_debug_optype]: "(none)",
1181 sv->sv_debug_cloned ? " (cloned)" : ""
1183 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1184 Perl_dump_sv_child(aTHX_ sv);
1190 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1194 /* Wait for up to 4 seconds for child to terminate.
1195 This seems to be the least effort way of timing out on reaping
1197 struct timeval waitfor = {4, 0};
1198 int sock = PL_dumper_fd;
1202 FD_SET(sock, &rset);
1203 select(sock + 1, &rset, NULL, NULL, &waitfor);
1204 waitpid(child, &status, WNOHANG);
1212 #if defined(PERLIO_LAYERS)
1213 /* No more IO - including error messages ! */
1214 PerlIO_cleanup(aTHX);
1217 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1218 as currently layers use it rather than Nullsv as a marker
1219 for no arg - and will try and SvREFCNT_dec it.
1221 SvREFCNT(&PL_sv_undef) = 0;
1222 SvREADONLY_off(&PL_sv_undef);
1224 Safefree(PL_origfilename);
1225 PL_origfilename = Nullch;
1226 Safefree(PL_reg_start_tmp);
1227 PL_reg_start_tmp = (char**)NULL;
1228 PL_reg_start_tmpl = 0;
1229 Safefree(PL_reg_curpm);
1230 Safefree(PL_reg_poscache);
1231 free_tied_hv_pool();
1232 Safefree(PL_op_mask);
1233 Safefree(PL_psig_ptr);
1234 PL_psig_ptr = (SV**)NULL;
1235 Safefree(PL_psig_name);
1236 PL_psig_name = (SV**)NULL;
1237 Safefree(PL_bitcount);
1238 PL_bitcount = Nullch;
1239 Safefree(PL_psig_pend);
1240 PL_psig_pend = (int*)NULL;
1241 PL_formfeed = Nullsv;
1243 PL_tainting = FALSE;
1244 PL_taint_warn = FALSE;
1245 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1248 DEBUG_P(debprofdump());
1250 #ifdef USE_REENTRANT_API
1251 Perl_reentrant_free(aTHX);
1256 /* As the absolutely last thing, free the non-arena SV for mess() */
1259 /* we know that type == SVt_PVMG */
1261 /* it could have accumulated taint magic */
1264 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1265 moremagic = mg->mg_moremagic;
1266 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1268 Safefree(mg->mg_ptr);
1272 /* we know that type >= SVt_PV */
1273 SvPV_free(PL_mess_sv);
1274 Safefree(SvANY(PL_mess_sv));
1275 Safefree(PL_mess_sv);
1276 PL_mess_sv = Nullsv;
1282 =for apidoc perl_free
1284 Releases a Perl interpreter. See L<perlembed>.
1292 #if defined(WIN32) || defined(NETWARE)
1293 # if defined(PERL_IMPLICIT_SYS)
1295 void *host = nw_internal_host;
1297 void *host = w32_internal_host;
1299 PerlMem_free(aTHXx);
1301 nw_delete_internal_host(host);
1303 win32_delete_internal_host(host);
1306 PerlMem_free(aTHXx);
1309 PerlMem_free(aTHXx);
1313 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1314 /* provide destructors to clean up the thread key when libperl is unloaded */
1315 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1317 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1318 #pragma fini "perl_fini"
1322 #if defined(__GNUC__)
1323 __attribute__((destructor))
1333 #endif /* THREADS */
1336 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1339 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1340 PL_exitlist[PL_exitlistlen].fn = fn;
1341 PL_exitlist[PL_exitlistlen].ptr = ptr;
1345 #ifdef HAS_PROCSELFEXE
1346 /* This is a function so that we don't hold on to MAXPATHLEN
1347 bytes of stack longer than necessary
1350 S_procself_val(pTHX_ SV *sv, const char *arg0)
1352 char buf[MAXPATHLEN];
1353 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1355 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1356 includes a spurious NUL which will cause $^X to fail in system
1357 or backticks (this will prevent extensions from being built and
1358 many tests from working). readlink is not meant to add a NUL.
1359 Normal readlink works fine.
1361 if (len > 0 && buf[len-1] == '\0') {
1365 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1366 returning the text "unknown" from the readlink rather than the path
1367 to the executable (or returning an error from the readlink). Any valid
1368 path has a '/' in it somewhere, so use that to validate the result.
1369 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1371 if (len > 0 && memchr(buf, '/', len)) {
1372 sv_setpvn(sv,buf,len);
1378 #endif /* HAS_PROCSELFEXE */
1381 S_set_caret_X(pTHX) {
1383 GV* tmpgv = gv_fetchpvs("\030",TRUE, SVt_PV); /* $^X */
1385 #ifdef HAS_PROCSELFEXE
1386 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1389 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1391 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1398 =for apidoc perl_parse
1400 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1406 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1413 PERL_UNUSED_VAR(my_perl);
1415 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1418 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1419 setuid perl scripts securely.\n");
1420 #endif /* IAMSUID */
1423 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1424 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1425 * This MUST be done before any hash stores or fetches take place.
1426 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1427 * yourself, it is your responsibility to provide a good random seed!
1428 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1429 if (!PL_rehash_seed_set)
1430 PL_rehash_seed = get_hash_seed();
1432 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1434 if (s && (atoi(s) == 1))
1435 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1437 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1442 if (PL_origalen != 0) {
1443 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1446 /* Set PL_origalen be the sum of the contiguous argv[]
1447 * elements plus the size of the env in case that it is
1448 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1449 * as the maximum modifiable length of $0. In the worst case
1450 * the area we are able to modify is limited to the size of
1451 * the original argv[0]. (See below for 'contiguous', though.)
1453 const char *s = NULL;
1456 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1457 /* Do the mask check only if the args seem like aligned. */
1459 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1461 /* See if all the arguments are contiguous in memory. Note
1462 * that 'contiguous' is a loose term because some platforms
1463 * align the argv[] and the envp[]. If the arguments look
1464 * like non-aligned, assume that they are 'strictly' or
1465 * 'traditionally' contiguous. If the arguments look like
1466 * aligned, we just check that they are within aligned
1467 * PTRSIZE bytes. As long as no system has something bizarre
1468 * like the argv[] interleaved with some other data, we are
1469 * fine. (Did I just evoke Murphy's Law?) --jhi */
1470 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1472 for (i = 1; i < PL_origargc; i++) {
1473 if ((PL_origargv[i] == s + 1
1475 || PL_origargv[i] == s + 2
1480 (PL_origargv[i] > s &&
1482 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1492 /* Can we grab env area too to be used as the area for $0? */
1493 if (s && PL_origenviron) {
1494 if ((PL_origenviron[0] == s + 1
1496 || (PL_origenviron[0] == s + 9 && (s += 8))
1501 (PL_origenviron[0] > s &&
1502 PL_origenviron[0] <=
1503 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1507 s = PL_origenviron[0];
1510 my_setenv("NoNe SuCh", Nullch);
1511 /* Force copy of environment. */
1512 for (i = 1; PL_origenviron[i]; i++) {
1513 if (PL_origenviron[i] == s + 1
1516 (PL_origenviron[i] > s &&
1517 PL_origenviron[i] <=
1518 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1521 s = PL_origenviron[i];
1529 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1534 /* Come here if running an undumped a.out. */
1536 PL_origfilename = savepv(argv[0]);
1537 PL_do_undump = FALSE;
1538 cxstack_ix = -1; /* start label stack again */
1540 assert (!PL_tainted);
1542 S_set_caret_X(aTHX);
1544 init_postdump_symbols(argc,argv,env);
1549 op_free(PL_main_root);
1550 PL_main_root = Nullop;
1552 PL_main_start = Nullop;
1553 SvREFCNT_dec(PL_main_cv);
1554 PL_main_cv = Nullcv;
1557 oldscope = PL_scopestack_ix;
1558 PL_dowarn = G_WARN_OFF;
1563 parse_body(env,xsinit);
1565 call_list(oldscope, PL_checkav);
1572 /* my_exit() was called */
1573 while (PL_scopestack_ix > oldscope)
1576 PL_curstash = PL_defstash;
1578 call_list(oldscope, PL_checkav);
1582 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1591 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1594 int argc = PL_origargc;
1595 char **argv = PL_origargv;
1596 const char *scriptname = NULL;
1597 VOL bool dosearch = FALSE;
1598 const char *validarg = "";
1601 const char *cddir = Nullch;
1602 #ifdef USE_SITECUSTOMIZE
1603 bool minus_f = FALSE;
1608 sv_setpvn(PL_linestr,"",0);
1609 sv = newSVpvs(""); /* first used for -I flags */
1613 for (argc--,argv++; argc > 0; argc--,argv++) {
1614 if (argv[0][0] != '-' || !argv[0][1])
1618 validarg = " PHOOEY ";
1622 * Can we rely on the kernel to start scripts with argv[1] set to
1623 * contain all #! line switches (the whole line)? (argv[0] is set to
1624 * the interpreter name, argv[2] to the script name; argv[3] and
1625 * above may contain other arguments.)
1632 #ifndef PERL_STRICT_CR
1657 if ((s = moreswitches(s)))
1662 CHECK_MALLOC_TOO_LATE_FOR('t');
1663 if( !PL_tainting ) {
1664 PL_taint_warn = TRUE;
1670 CHECK_MALLOC_TOO_LATE_FOR('T');
1672 PL_taint_warn = FALSE;
1680 #ifdef MACOS_TRADITIONAL
1681 /* ignore -e for Dev:Pseudo argument */
1682 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1687 PL_e_script = newSVpvs("");
1688 filter_add(read_e_script, NULL);
1691 sv_catpv(PL_e_script, s);
1693 sv_catpv(PL_e_script, argv[1]);
1697 Perl_croak(aTHX_ "No code specified for -%c", *s);
1698 sv_catpvs(PL_e_script, "\n");
1702 #ifdef USE_SITECUSTOMIZE
1708 case 'I': /* -I handled both here and in moreswitches() */
1710 if (!*++s && (s=argv[1]) != Nullch) {
1714 STRLEN len = strlen(s);
1715 const char * const p = savepvn(s, len);
1716 incpush(p, TRUE, TRUE, FALSE, FALSE);
1717 sv_catpvs(sv, "-I");
1718 sv_catpvn(sv, p, len);
1723 Perl_croak(aTHX_ "No directory specified for -I");
1727 PL_preprocess = TRUE;
1740 PL_preambleav = newAV();
1741 av_push(PL_preambleav,
1742 newSVpvs("use Config;"));
1746 opts_prog = newSVpvs("print Config::myconfig(),");
1748 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1750 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1752 opts = SvCUR(opts_prog);
1754 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1758 # ifdef DEBUG_LEAKING_SCALARS
1759 " DEBUG_LEAKING_SCALARS"
1761 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1762 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1764 # ifdef FAKE_THREADS
1767 # ifdef MULTIPLICITY
1776 # ifdef PERL_DONT_CREATE_GVSV
1777 " PERL_DONT_CREATE_GVSV"
1779 # ifdef PERL_GLOBAL_STRUCT
1780 " PERL_GLOBAL_STRUCT"
1782 # ifdef PERL_IMPLICIT_CONTEXT
1783 " PERL_IMPLICIT_CONTEXT"
1785 # ifdef PERL_IMPLICIT_SYS
1786 " PERL_IMPLICIT_SYS"
1788 # ifdef PERL_MALLOC_WRAP
1791 # ifdef PERL_NEED_APPCTX
1794 # ifdef PERL_NEED_TIMESBASE
1795 " PERL_NEED_TIMESBASE"
1797 # ifdef PERL_OLD_COPY_ON_WRITE
1798 " PERL_OLD_COPY_ON_WRITE"
1800 # ifdef PERL_TRACK_MEMPOOL
1801 " PERL_TRACK_MEMPOOL"
1803 # ifdef PERL_USE_SAFE_PUTENV
1804 " PERL_USE_SAFE_PUTENV"
1806 #ifdef PERL_USES_PL_PIDSTATUS
1807 " PERL_USES_PL_PIDSTATUS"
1809 # ifdef PL_OP_SLAB_ALLOC
1812 # ifdef THREADS_HAVE_PIDS
1813 " THREADS_HAVE_PIDS"
1815 # ifdef USE_5005THREADS
1818 # ifdef USE_64_BIT_ALL
1821 # ifdef USE_64_BIT_INT
1824 # ifdef USE_ITHREADS
1827 # ifdef USE_LARGE_FILES
1830 # ifdef USE_LONG_DOUBLE
1836 # ifdef USE_REENTRANT_API
1837 " USE_REENTRANT_API"
1842 # ifdef USE_SITECUSTOMIZE
1843 " USE_SITECUSTOMIZE"
1850 while (SvCUR(opts_prog) > opts+76) {
1851 /* find last space after "options: " and before col 76
1855 char * const pv = SvPV_nolen(opts_prog);
1856 const char c = pv[opts+76];
1858 space = strrchr(pv+opts+26, ' ');
1860 if (!space) break; /* "Can't happen" */
1862 /* break the line before that space */
1865 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1866 STR_WITH_LEN("\\n "));
1869 sv_catpvs(opts_prog,"\\n\",");
1871 #if defined(LOCAL_PATCH_COUNT)
1872 if (LOCAL_PATCH_COUNT > 0) {
1874 sv_catpvs(opts_prog,
1875 "\" Locally applied patches:\\n\",");
1876 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1877 if (PL_localpatches[i])
1878 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1879 0, PL_localpatches[i], 0);
1883 Perl_sv_catpvf(aTHX_ opts_prog,
1884 "\" Built under %s\\n\"",OSNAME);
1887 Perl_sv_catpvf(aTHX_ opts_prog,
1888 ",\" Compiled at %s %s\\n\"",__DATE__,
1891 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1895 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1896 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1897 "sort grep {/^PERL/} keys %ENV; ");
1899 sv_catpvs(opts_prog,
1900 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1902 sv_catpvs(opts_prog,
1903 "print \" \\%ENV:\\n @env\\n\" if @env;"
1904 "print \" \\@INC:\\n @INC\\n\";");
1908 opts_prog = Perl_newSVpvf(aTHX_
1909 "Config::config_vars(qw%c%s%c)",
1913 av_push(PL_preambleav, opts_prog);
1914 /* don't look for script or read stdin */
1915 scriptname = BIT_BUCKET;
1919 PL_doextract = TRUE;
1927 if (!*++s || isSPACE(*s)) {
1931 /* catch use of gnu style long options */
1932 if (strEQ(s, "version")) {
1936 if (strEQ(s, "help")) {
1943 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1949 #ifndef SECURE_INTERNAL_GETENV
1952 (s = PerlEnv_getenv("PERL5OPT")))
1954 const char *popt = s;
1957 if (*s == '-' && *(s+1) == 'T') {
1958 CHECK_MALLOC_TOO_LATE_FOR('T');
1960 PL_taint_warn = FALSE;
1963 char *popt_copy = Nullch;
1976 if (!strchr("CDIMUdmtwA", *s))
1977 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1981 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1982 s = popt_copy + (s - popt);
1983 d = popt_copy + (d - popt);
1990 if( !PL_tainting ) {
1991 PL_taint_warn = TRUE;
2001 #ifdef USE_SITECUSTOMIZE
2004 PL_preambleav = newAV();
2005 av_unshift(PL_preambleav, 1);
2006 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2010 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2011 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2015 scriptname = argv[0];
2018 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2020 else if (scriptname == Nullch) {
2022 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2028 /* Set $^X early so that it can be used for relocatable paths in @INC */
2029 assert (!PL_tainted);
2031 S_set_caret_X(aTHX);
2035 open_script(scriptname,dosearch,sv);
2037 validate_suid(validarg, scriptname);
2040 #if defined(SIGCHLD) || defined(SIGCLD)
2043 # define SIGCHLD SIGCLD
2045 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2046 if (sigstate == (Sighandler_t) SIG_IGN) {
2047 if (ckWARN(WARN_SIGNAL))
2048 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2049 "Can't ignore signal CHLD, forcing to default");
2050 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2056 #ifdef MACOS_TRADITIONAL
2057 if (PL_doextract || gMacPerl_AlwaysExtract) {
2062 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2063 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2067 PL_main_cv = PL_compcv = (CV*)newSV(0);
2068 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2069 CvUNIQUE_on(PL_compcv);
2071 CvPADLIST(PL_compcv) = pad_new(0);
2072 #ifdef USE_5005THREADS
2073 CvOWNER(PL_compcv) = 0;
2074 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2075 MUTEX_INIT(CvMUTEXP(PL_compcv));
2076 #endif /* USE_5005THREADS */
2079 boot_core_UNIVERSAL();
2080 boot_core_xsutils();
2083 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2085 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2091 # ifdef HAS_SOCKS5_INIT
2092 socks5_init(argv[0]);
2098 init_predump_symbols();
2099 /* init_postdump_symbols not currently designed to be called */
2100 /* more than once (ENV isn't cleared first, for example) */
2101 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2103 init_postdump_symbols(argc,argv,env);
2105 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2106 * or explicitly in some platforms.
2107 * locale.c:Perl_init_i18nl10n() if the environment
2108 * look like the user wants to use UTF-8. */
2109 #if defined(__SYMBIAN32__)
2110 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2113 /* Requires init_predump_symbols(). */
2114 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2119 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2120 * and the default open disciplines. */
2121 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2122 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2124 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2125 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2126 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2128 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2129 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2130 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2132 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2133 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2134 (sv = GvSV(gv_fetchpvs("\017PEN", TRUE, SVt_PV)))) {
2135 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2136 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2139 sv_setpvn(sv, ":utf8\0:utf8", 11);
2141 sv_setpvn(sv, ":utf8\0", 6);
2144 sv_setpvn(sv, "\0:utf8", 6);
2150 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2151 if (strEQ(s, "unsafe"))
2152 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2153 else if (strEQ(s, "safe"))
2154 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2156 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2161 /* now parse the script */
2163 SETERRNO(0,SS_NORMAL);
2165 #ifdef MACOS_TRADITIONAL
2166 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2168 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2170 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2171 MacPerl_MPWFileName(PL_origfilename));
2175 if (yyparse() || PL_error_count) {
2177 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2179 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2184 CopLINE_set(PL_curcop, 0);
2185 PL_curstash = PL_defstash;
2186 PL_preprocess = FALSE;
2188 SvREFCNT_dec(PL_e_script);
2189 PL_e_script = Nullsv;
2196 SAVECOPFILE(PL_curcop);
2197 SAVECOPLINE(PL_curcop);
2198 gv_check(PL_defstash);
2205 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2206 dump_mstats("after compilation:");
2215 =for apidoc perl_run
2217 Tells a Perl interpreter to run. See L<perlembed>.
2230 PERL_UNUSED_ARG(my_perl);
2232 oldscope = PL_scopestack_ix;
2240 cxstack_ix = -1; /* start context stack again */
2242 case 0: /* normal completion */
2246 case 2: /* my_exit() */
2247 while (PL_scopestack_ix > oldscope)
2250 PL_curstash = PL_defstash;
2251 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2252 PL_endav && !PL_minus_c)
2253 call_list(oldscope, PL_endav);
2255 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2256 dump_mstats("after execution: ");
2262 POPSTACK_TO(PL_mainstack);
2265 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2277 S_run_body(pTHX_ I32 oldscope)
2280 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2281 PL_sawampersand ? "Enabling" : "Omitting"));
2283 if (!PL_restartop) {
2284 DEBUG_x(dump_all());
2287 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2289 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2293 #ifdef MACOS_TRADITIONAL
2294 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2295 (gMacPerl_ErrorFormat ? "# " : ""),
2296 MacPerl_MPWFileName(PL_origfilename));
2298 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2302 if (PERLDB_SINGLE && PL_DBsingle)
2303 sv_setiv(PL_DBsingle, 1);
2305 call_list(oldscope, PL_initav);
2311 PL_op = PL_restartop;
2315 else if (PL_main_start) {
2316 CvDEPTH(PL_main_cv) = 1;
2317 PL_op = PL_main_start;
2325 =head1 SV Manipulation Functions
2327 =for apidoc p||get_sv
2329 Returns the SV of the specified Perl scalar. If C<create> is set and the
2330 Perl variable does not exist then it will be created. If C<create> is not
2331 set and the variable does not exist then NULL is returned.
2337 Perl_get_sv(pTHX_ const char *name, I32 create)
2340 #ifdef USE_5005THREADS
2341 if (name[1] == '\0' && !isALPHA(name[0])) {
2342 PADOFFSET tmp = find_threadsv(name);
2343 if (tmp != NOT_IN_PAD)
2344 return THREADSV(tmp);
2346 #endif /* USE_5005THREADS */
2347 gv = gv_fetchpv(name, create, SVt_PV);
2354 =head1 Array Manipulation Functions
2356 =for apidoc p||get_av
2358 Returns the AV of the specified Perl array. If C<create> is set and the
2359 Perl variable does not exist then it will be created. If C<create> is not
2360 set and the variable does not exist then NULL is returned.
2366 Perl_get_av(pTHX_ const char *name, I32 create)
2368 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2377 =head1 Hash Manipulation Functions
2379 =for apidoc p||get_hv
2381 Returns the HV of the specified Perl hash. If C<create> is set and the
2382 Perl variable does not exist then it will be created. If C<create> is not
2383 set and the variable does not exist then NULL is returned.
2389 Perl_get_hv(pTHX_ const char *name, I32 create)
2391 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2400 =head1 CV Manipulation Functions
2402 =for apidoc p||get_cv
2404 Returns the CV of the specified Perl subroutine. If C<create> is set and
2405 the Perl subroutine does not exist then it will be declared (which has the
2406 same effect as saying C<sub name;>). If C<create> is not set and the
2407 subroutine does not exist then NULL is returned.
2413 Perl_get_cv(pTHX_ const char *name, I32 create)
2415 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2416 /* XXX unsafe for threads if eval_owner isn't held */
2417 /* XXX this is probably not what they think they're getting.
2418 * It has the same effect as "sub name;", i.e. just a forward
2420 if (create && !GvCVu(gv))
2421 return newSUB(start_subparse(FALSE, 0),
2422 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2430 /* Be sure to refetch the stack pointer after calling these routines. */
2434 =head1 Callback Functions
2436 =for apidoc p||call_argv
2438 Performs a callback to the specified Perl sub. See L<perlcall>.
2444 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2446 /* See G_* flags in cop.h */
2447 /* null terminated arg list */
2455 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2460 return call_pv(sub_name, flags);
2464 =for apidoc p||call_pv
2466 Performs a callback to the specified Perl sub. See L<perlcall>.
2472 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2473 /* name of the subroutine */
2474 /* See G_* flags in cop.h */
2476 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2480 =for apidoc p||call_method
2482 Performs a callback to the specified Perl method. The blessed object must
2483 be on the stack. See L<perlcall>.
2489 Perl_call_method(pTHX_ const char *methname, I32 flags)
2490 /* name of the subroutine */
2491 /* See G_* flags in cop.h */
2493 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2496 /* May be called with any of a CV, a GV, or an SV containing the name. */
2498 =for apidoc p||call_sv
2500 Performs a callback to the Perl sub whose name is in the SV. See
2507 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2508 /* See G_* flags in cop.h */
2511 LOGOP myop; /* fake syntax tree node */
2514 volatile I32 retval = 0;
2516 bool oldcatch = CATCH_GET;
2518 OP* const oldop = PL_op;
2521 if (flags & G_DISCARD) {
2526 Zero(&myop, 1, LOGOP);
2527 myop.op_next = Nullop;
2528 if (!(flags & G_NOARGS))
2529 myop.op_flags |= OPf_STACKED;
2530 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2531 (flags & G_ARRAY) ? OPf_WANT_LIST :
2536 EXTEND(PL_stack_sp, 1);
2537 *++PL_stack_sp = sv;
2539 oldscope = PL_scopestack_ix;
2541 if (PERLDB_SUB && PL_curstash != PL_debstash
2542 /* Handle first BEGIN of -d. */
2543 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2544 /* Try harder, since this may have been a sighandler, thus
2545 * curstash may be meaningless. */
2546 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2547 && !(flags & G_NODEBUG))
2548 PL_op->op_private |= OPpENTERSUB_DB;
2550 if (flags & G_METHOD) {
2551 Zero(&method_op, 1, UNOP);
2552 method_op.op_next = PL_op;
2553 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2554 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2555 PL_op = (OP*)&method_op;
2558 if (!(flags & G_EVAL)) {
2560 call_body((OP*)&myop, FALSE);
2561 retval = PL_stack_sp - (PL_stack_base + oldmark);
2562 CATCH_SET(oldcatch);
2565 myop.op_other = (OP*)&myop;
2567 /* we're trying to emulate pp_entertry() here */
2569 register PERL_CONTEXT *cx;
2570 const I32 gimme = GIMME_V;
2575 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2577 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2579 PL_in_eval = EVAL_INEVAL;
2580 if (flags & G_KEEPERR)
2581 PL_in_eval |= EVAL_KEEPERR;
2583 sv_setpvn(ERRSV,"",0);
2591 call_body((OP*)&myop, FALSE);
2592 retval = PL_stack_sp - (PL_stack_base + oldmark);
2593 if (!(flags & G_KEEPERR))
2594 sv_setpvn(ERRSV,"",0);
2600 /* my_exit() was called */
2601 PL_curstash = PL_defstash;
2604 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2605 Perl_croak(aTHX_ "Callback called exit");
2610 PL_op = PL_restartop;
2614 PL_stack_sp = PL_stack_base + oldmark;
2615 if (flags & G_ARRAY)
2619 *++PL_stack_sp = &PL_sv_undef;
2624 if (PL_scopestack_ix > oldscope) {
2628 register PERL_CONTEXT *cx;
2635 PERL_UNUSED_VAR(newsp);
2636 PERL_UNUSED_VAR(gimme);
2637 PERL_UNUSED_VAR(optype);
2642 if (flags & G_DISCARD) {
2643 PL_stack_sp = PL_stack_base + oldmark;
2653 S_call_body(pTHX_ const OP *myop, bool is_eval)
2656 if (PL_op == myop) {
2658 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2660 PL_op = Perl_pp_entersub(aTHX); /* this does */
2666 /* Eval a string. The G_EVAL flag is always assumed. */
2669 =for apidoc p||eval_sv
2671 Tells Perl to C<eval> the string in the SV.
2677 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2679 /* See G_* flags in cop.h */
2683 UNOP myop; /* fake syntax tree node */
2684 volatile I32 oldmark = SP - PL_stack_base;
2685 volatile I32 retval = 0;
2687 OP* const oldop = PL_op;
2690 if (flags & G_DISCARD) {
2697 Zero(PL_op, 1, UNOP);
2698 EXTEND(PL_stack_sp, 1);
2699 *++PL_stack_sp = sv;
2701 if (!(flags & G_NOARGS))
2702 myop.op_flags = OPf_STACKED;
2703 myop.op_next = Nullop;
2704 myop.op_type = OP_ENTEREVAL;
2705 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2706 (flags & G_ARRAY) ? OPf_WANT_LIST :
2708 if (flags & G_KEEPERR)
2709 myop.op_flags |= OPf_SPECIAL;
2711 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2712 * before a PUSHEVAL, which corrupts the stack after a croak */
2713 TAINT_PROPER("eval_sv()");
2719 call_body((OP*)&myop,TRUE);
2720 retval = PL_stack_sp - (PL_stack_base + oldmark);
2721 if (!(flags & G_KEEPERR))
2722 sv_setpvn(ERRSV,"",0);
2728 /* my_exit() was called */
2729 PL_curstash = PL_defstash;
2732 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2733 Perl_croak(aTHX_ "Callback called exit");
2738 PL_op = PL_restartop;
2742 PL_stack_sp = PL_stack_base + oldmark;
2743 if (flags & G_ARRAY)
2747 *++PL_stack_sp = &PL_sv_undef;
2753 if (flags & G_DISCARD) {
2754 PL_stack_sp = PL_stack_base + oldmark;
2764 =for apidoc p||eval_pv
2766 Tells Perl to C<eval> the given string and return an SV* result.
2772 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2776 SV* sv = newSVpv(p, 0);
2778 eval_sv(sv, G_SCALAR);
2785 if (croak_on_error && SvTRUE(ERRSV)) {
2786 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2792 /* Require a module. */
2795 =head1 Embedding Functions
2797 =for apidoc p||require_pv
2799 Tells Perl to C<require> the file named by the string argument. It is
2800 analogous to the Perl code C<eval "require '$file'">. It's even
2801 implemented that way; consider using load_module instead.
2806 Perl_require_pv(pTHX_ const char *pv)
2811 PUSHSTACKi(PERLSI_REQUIRE);
2813 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2814 eval_sv(sv_2mortal(sv), G_DISCARD);
2820 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2822 register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV);
2825 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2829 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2831 /* This message really ought to be max 23 lines.
2832 * Removed -h because the user already knows that option. Others? */
2834 static const char * const usage_msg[] = {
2835 "-0[octal] specify record separator (\\0, if no argument)",
2836 "-A[mod][=pattern] activate all/given assertions",
2837 "-a autosplit mode with -n or -p (splits $_ into @F)",
2838 "-C[number/list] enables the listed Unicode features",
2839 "-c check syntax only (runs BEGIN and CHECK blocks)",
2840 "-d[:debugger] run program under debugger",
2841 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2842 "-e program one line of program (several -e's allowed, omit programfile)",
2843 "-E program like -e, but enables all optional features",
2844 "-f don't do $sitelib/sitecustomize.pl at startup",
2845 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2846 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2847 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2848 "-l[octal] enable line ending processing, specifies line terminator",
2849 "-[mM][-]module execute \"use/no module...\" before executing program",
2850 "-n assume \"while (<>) { ... }\" loop around program",
2851 "-p assume loop like -n but print line also, like sed",
2852 "-P run program through C preprocessor before compilation",
2853 "-s enable rudimentary parsing for switches after programfile",
2854 "-S look for programfile using PATH environment variable",
2855 "-t enable tainting warnings",
2856 "-T enable tainting checks",
2857 "-u dump core after parsing program",
2858 "-U allow unsafe operations",
2859 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2860 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2861 "-w enable many useful warnings (RECOMMENDED)",
2862 "-W enable all warnings",
2863 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2864 "-X disable all warnings",
2868 const char * const *p = usage_msg;
2870 PerlIO_printf(PerlIO_stdout(),
2871 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2874 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2877 /* convert a string of -D options (or digits) into an int.
2878 * sets *s to point to the char after the options */
2882 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2884 static const char * const usage_msgd[] = {
2885 " Debugging flag values: (see also -d)",
2886 " p Tokenizing and parsing (with v, displays parse stack)",
2887 " s Stack snapshots (with v, displays all stacks)",
2888 " l Context (loop) stack processing",
2889 " t Trace execution",
2890 " o Method and overloading resolution",
2891 " c String/numeric conversions",
2892 " P Print profiling info, preprocessor command for -P, source file input state",
2893 " m Memory allocation",
2894 " f Format processing",
2895 " r Regular expression parsing and execution",
2896 " x Syntax tree dump",
2897 " u Tainting checks",
2898 " H Hash dump -- usurps values()",
2899 " X Scratchpad allocation",
2901 " S Thread synchronization",
2903 " R Include reference counts of dumped variables (eg when using -Ds)",
2904 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2905 " v Verbose: use in conjunction with other flags",
2907 " A Consistency checks on internal structures",
2908 " q quiet - currently only suppresses the 'EXECUTING' message",
2913 /* if adding extra options, remember to update DEBUG_MASK */
2914 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2916 for (; isALNUM(**s); (*s)++) {
2917 const char * const d = strchr(debopts,**s);
2919 i |= 1 << (d - debopts);
2920 else if (ckWARN_d(WARN_DEBUGGING))
2921 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2922 "invalid option -D%c, use -D'' to see choices\n", **s);
2925 else if (isDIGIT(**s)) {
2927 for (; isALNUM(**s); (*s)++) ;
2929 else if (givehelp) {
2930 const char *const *p = usage_msgd;
2931 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2934 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2935 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2936 "-Dp not implemented on this platform\n");
2942 /* This routine handles any switches that can be given during run */
2945 Perl_moreswitches(pTHX_ char *s)
2956 SvREFCNT_dec(PL_rs);
2957 if (s[1] == 'x' && s[2]) {
2958 const char *e = s+=2;
2964 flags = PERL_SCAN_SILENT_ILLDIGIT;
2965 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2966 if (s + numlen < e) {
2967 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2971 PL_rs = newSVpvs("");
2972 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2973 tmps = (U8*)SvPVX(PL_rs);
2974 uvchr_to_utf8(tmps, rschar);
2975 SvCUR_set(PL_rs, UNISKIP(rschar));
2980 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2981 if (rschar & ~((U8)~0))
2982 PL_rs = &PL_sv_undef;
2983 else if (!rschar && numlen >= 2)
2984 PL_rs = newSVpvs("");
2986 char ch = (char)rschar;
2987 PL_rs = newSVpvn(&ch, 1);
2990 sv_setsv(get_sv("/", TRUE), PL_rs);
2995 PL_unicode = parse_unicode_opts( (const char **)&s );
3000 while (*s && !isSPACE(*s)) ++s;
3002 PL_splitstr = savepv(PL_splitstr);
3016 /* -dt indicates to the debugger that threads will be used */
3017 if (*s == 't' && !isALNUM(s[1])) {
3019 my_setenv("PERL5DB_THREADED", "1");
3022 /* The following permits -d:Mod to accepts arguments following an =
3023 in the fashion that -MSome::Mod does. */
3024 if (*s == ':' || *s == '=') {
3026 SV * const sv = newSVpvs("use Devel::");
3028 /* We now allow -d:Module=Foo,Bar */
3029 while(isALNUM(*s) || *s==':') ++s;
3031 sv_catpv(sv, start);
3033 sv_catpvn(sv, start, s-start);
3034 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3037 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3040 PL_perldb = PERLDB_ALL;
3049 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3050 #else /* !DEBUGGING */
3051 if (ckWARN_d(WARN_DEBUGGING))
3052 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3053 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3054 for (s++; isALNUM(*s); s++) ;
3059 usage(PL_origargv[0]);
3062 Safefree(PL_inplace);
3063 #if defined(__CYGWIN__) /* do backup extension automagically */
3064 if (*(s+1) == '\0') {
3065 PL_inplace = savepvs(".bak");
3068 #endif /* __CYGWIN__ */
3069 PL_inplace = savepv(s+1);
3070 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3074 if (*s == '-') /* Additional switches on #! line. */
3078 case 'I': /* -I handled both here and in parse_body() */
3081 while (*s && isSPACE(*s))
3086 /* ignore trailing spaces (possibly followed by other switches) */
3088 for (e = p; *e && !isSPACE(*e); e++) ;
3092 } while (*p && *p != '-');
3093 e = savepvn(s, e-s);
3094 incpush(e, TRUE, TRUE, FALSE, FALSE);
3101 Perl_croak(aTHX_ "No directory specified for -I");
3107 SvREFCNT_dec(PL_ors_sv);
3113 PL_ors_sv = newSVpvs("\n");
3114 numlen = 3 + (*s == '0');
3115 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3119 if (RsPARA(PL_rs)) {
3120 PL_ors_sv = newSVpvs("\n\n");
3123 PL_ors_sv = newSVsv(PL_rs);
3130 PL_preambleav = newAV();
3133 char * const start = s;
3134 SV * const sv = newSVpvs("use assertions::activate");
3135 while(isALNUM(*s) || *s == ':') ++s;
3137 sv_catpvs(sv, "::");
3138 sv_catpvn(sv, start, s-start);
3141 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3144 else if (*s != '\0') {
3145 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3147 av_push(PL_preambleav, sv);
3151 forbid_setid("-M"); /* XXX ? */
3154 forbid_setid("-m"); /* XXX ? */
3158 const char *use = "use ";
3159 /* -M-foo == 'no foo' */
3160 /* Leading space on " no " is deliberate, to make both
3161 possibilities the same length. */
3162 if (*s == '-') { use = " no "; ++s; }
3163 sv = newSVpvn(use,4);
3165 /* We allow -M'Module qw(Foo Bar)' */
3166 while(isALNUM(*s) || *s==':') ++s;
3168 sv_catpv(sv, start);
3169 if (*(start-1) == 'm') {
3171 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3172 sv_catpvs( sv, " ()");
3176 Perl_croak(aTHX_ "Module name required with -%c option",
3178 sv_catpvn(sv, start, s-start);
3179 sv_catpvs(sv, " split(/,/,q");
3180 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3182 sv_catpvs(sv, "\0)");
3186 PL_preambleav = newAV();
3187 av_push(PL_preambleav, sv);
3190 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3202 PL_doswitches = TRUE;
3216 #ifdef MACOS_TRADITIONAL
3217 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3219 PL_do_undump = TRUE;
3227 if (!sv_derived_from(PL_patchlevel, "version"))
3228 upg_version(PL_patchlevel);
3230 PerlIO_printf(PerlIO_stdout(),
3231 Perl_form(aTHX_ "\nThis is perl, %"SVf
3232 #ifdef PERL_PATCHNUM
3233 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3236 vstringify(PL_patchlevel),
3239 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3240 PerlIO_printf(PerlIO_stdout(),
3241 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3242 vstringify(PL_patchlevel)));
3243 PerlIO_printf(PerlIO_stdout(),
3244 Perl_form(aTHX_ " built under %s at %s %s\n",
3245 OSNAME, __DATE__, __TIME__));
3246 PerlIO_printf(PerlIO_stdout(),
3247 Perl_form(aTHX_ " OS Specific Release: %s\n",
3251 #if defined(LOCAL_PATCH_COUNT)
3252 if (LOCAL_PATCH_COUNT > 0)
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\n(with %d registered patch%s, "
3255 "see perl -V for more detail)",
3256 (int)LOCAL_PATCH_COUNT,
3257 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n\nCopyright 1987-2006, Larry Wall\n");
3262 #ifdef MACOS_TRADITIONAL
3263 PerlIO_printf(PerlIO_stdout(),
3264 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3265 "maintained by Chris Nandor\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3274 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3279 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "atariST series port, ++jrb bammi@cadence.com\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "MiNT port by Guido Flohr, 1997-1999\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "EPOC port by Olaf Flebbe, 1999-2002\n");
3318 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3319 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3322 #ifdef __SYMBIAN32__
3323 PerlIO_printf(PerlIO_stdout(),
3324 "Symbian port by Nokia, 2004-2005\n");
3326 #ifdef BINARY_BUILD_NOTICE
3327 BINARY_BUILD_NOTICE;
3329 PerlIO_printf(PerlIO_stdout(),
3331 Perl may be copied only under the terms of either the Artistic License or the\n\
3332 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3333 Complete documentation for Perl, including FAQ lists, should be found on\n\
3334 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3335 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3338 if (! (PL_dowarn & G_WARN_ALL_MASK))
3339 PL_dowarn |= G_WARN_ON;
3343 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3344 if (!specialWARN(PL_compiling.cop_warnings))
3345 SvREFCNT_dec(PL_compiling.cop_warnings);
3346 PL_compiling.cop_warnings = pWARN_ALL ;
3350 PL_dowarn = G_WARN_ALL_OFF;
3351 if (!specialWARN(PL_compiling.cop_warnings))
3352 SvREFCNT_dec(PL_compiling.cop_warnings);
3353 PL_compiling.cop_warnings = pWARN_NONE ;
3358 if (s[1] == '-') /* Additional switches on #! line. */
3363 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3369 #ifdef ALTERNATE_SHEBANG
3370 case 'S': /* OS/2 needs -S on "extproc" line. */
3378 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3383 /* compliments of Tom Christiansen */
3385 /* unexec() can be found in the Gnu emacs distribution */
3386 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3389 Perl_my_unexec(pTHX)
3397 prog = newSVpv(BIN_EXP, 0);
3398 sv_catpvs(prog, "/perl");
3399 file = newSVpv(PL_origfilename, 0);
3400 sv_catpvs(file, ".perldump");
3402 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3403 /* unexec prints msg to stderr in case of failure */
3404 PerlProc_exit(status);
3407 # include <lib$routines.h>
3408 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3409 # elif defined(WIN32) || defined(__CYGWIN__)
3410 Perl_croak(aTHX_ "dump is not supported");
3412 ABORT(); /* for use with undump */
3417 /* initialize curinterp */
3423 # define PERLVAR(var,type)
3424 # define PERLVARA(var,n,type)
3425 # if defined(PERL_IMPLICIT_CONTEXT)
3426 # if defined(USE_5005THREADS)
3427 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3428 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3429 # else /* !USE_5005THREADS */
3430 # define PERLVARI(var,type,init) aTHX->var = init;
3431 # define PERLVARIC(var,type,init) aTHX->var = init;
3432 # endif /* USE_5005THREADS */
3434 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3435 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3437 # include "intrpvar.h"
3438 # ifndef USE_5005THREADS
3439 # include "thrdvar.h"
3446 # define PERLVAR(var,type)
3447 # define PERLVARA(var,n,type)
3448 # define PERLVARI(var,type,init) PL_##var = init;
3449 # define PERLVARIC(var,type,init) PL_##var = init;
3450 # include "intrpvar.h"
3451 # ifndef USE_5005THREADS
3452 # include "thrdvar.h"
3463 S_init_main_stash(pTHX)
3468 PL_curstash = PL_defstash = newHV();
3469 /* We know that the string "main" will be in the global shared string
3470 table, so it's a small saving to use it rather than allocate another
3472 PL_curstname = newSVpvs_share("main");
3473 gv = gv_fetchpvs("main::",TRUE, SVt_PVHV);
3474 /* If we hadn't caused another reference to "main" to be in the shared
3475 string table above, then it would be worth reordering these two,
3476 because otherwise all we do is delete "main" from it as a consequence
3477 of the SvREFCNT_dec, only to add it again with hv_name_set */
3478 SvREFCNT_dec(GvHV(gv));
3479 hv_name_set(PL_defstash, "main", 4, 0);
3480 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3482 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC",TRUE, SVt_PVAV)));
3483 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3484 GvMULTI_on(PL_incgv);
3485 PL_hintgv = gv_fetchpvs("\010",TRUE, SVt_PV); /* ^H */
3486 GvMULTI_on(PL_hintgv);
3487 PL_defgv = gv_fetchpvs("_",TRUE, SVt_PVAV);
3488 SvREFCNT_inc(PL_defgv);
3489 PL_errgv = gv_HVadd(gv_fetchpvs("@", TRUE, SVt_PV));
3490 SvREFCNT_inc(PL_errgv);
3491 GvMULTI_on(PL_errgv);
3492 PL_replgv = gv_fetchpvs("\022", TRUE, SVt_PV); /* ^R */
3493 GvMULTI_on(PL_replgv);
3494 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3495 #ifdef PERL_DONT_CREATE_GVSV
3498 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3499 sv_setpvn(ERRSV, "", 0);
3500 PL_curstash = PL_defstash;
3501 CopSTASH_set(&PL_compiling, PL_defstash);
3502 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3503 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3505 /* We must init $/ before switches are processed. */
3506 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3509 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3511 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3516 const char *cpp_discard_flag;
3525 PL_origfilename = savepvs("-e");
3528 /* if find_script() returns, it returns a malloc()-ed value */
3529 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3531 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3532 const char *s = scriptname + 8;
3533 PL_fdscript = atoi(s);
3538 * Tell apart "normal" usage of fdscript, e.g.
3539 * with bash on FreeBSD:
3540 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3541 * from usage in suidperl.
3542 * Does any "normal" usage leave garbage after the number???
3543 * Is it a mistake to use a similar /dev/fd/ construct for
3548 * Be supersafe and do some sanity-checks.
3549 * Still, can we be sure we got the right thing?
3552 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3555 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3557 scriptname = savepv(s + 1);
3558 Safefree(PL_origfilename);
3559 PL_origfilename = (char *)scriptname;
3564 CopFILE_free(PL_curcop);
3565 CopFILE_set(PL_curcop, PL_origfilename);
3566 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3567 scriptname = (char *)"";
3568 if (PL_fdscript >= 0) {
3569 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3570 # if defined(HAS_FCNTL) && defined(F_SETFD)
3572 /* ensure close-on-exec */
3573 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3578 Perl_croak(aTHX_ "sperl needs fd script\n"
3579 "You should not call sperl directly; do you need to "
3580 "change a #! line\nfrom sperl to perl?\n");
3583 * Do not open (or do other fancy stuff) while setuid.
3584 * Perl does the open, and hands script to suidperl on a fd;
3585 * suidperl only does some checks, sets up UIDs and re-execs
3586 * perl with that fd as it has always done.
3589 if (PL_suidscript != 1) {
3590 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3593 else if (PL_preprocess) {
3594 const char * const cpp_cfg = CPPSTDIN;
3595 SV * const cpp = newSVpvs("");
3596 SV * const cmd = newSV(0);
3598 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3599 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3600 if (strEQ(cpp_cfg, "cppstdin"))
3601 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3602 sv_catpv(cpp, cpp_cfg);
3605 sv_catpvs(sv, "-I");
3606 sv_catpv(sv,PRIVLIB_EXP);
3609 DEBUG_P(PerlIO_printf(Perl_debug_log,
3610 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3611 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3614 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3621 cpp_discard_flag = "";
3623 cpp_discard_flag = "-C";
3627 perl = os2_execname(aTHX);
3629 perl = PL_origargv[0];
3633 /* This strips off Perl comments which might interfere with
3634 the C pre-processor, including #!. #line directives are
3635 deliberately stripped to avoid confusion with Perl's version
3636 of #line. FWP played some golf with it so it will fit
3637 into VMS's 255 character buffer.
3640 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3642 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3644 Perl_sv_setpvf(aTHX_ cmd, "\
3645 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3646 perl, quote, code, quote, scriptname, cpp,
3647 cpp_discard_flag, sv, CPPMINUS);
3649 PL_doextract = FALSE;
3651 DEBUG_P(PerlIO_printf(Perl_debug_log,
3652 "PL_preprocess: cmd=\"%s\"\n",
3655 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3659 else if (!*scriptname) {
3660 forbid_setid("program input from stdin");
3661 PL_rsfp = PerlIO_stdin();
3664 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3665 # if defined(HAS_FCNTL) && defined(F_SETFD)
3667 /* ensure close-on-exec */
3668 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3671 #endif /* IAMSUID */
3673 /* PSz 16 Sep 03 Keep neat error message */
3675 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3677 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3678 CopFILE(PL_curcop), Strerror(errno));
3683 * I_SYSSTATVFS HAS_FSTATVFS
3685 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3686 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3687 * here so that metaconfig picks them up. */
3691 S_fd_on_nosuid_fs(pTHX_ int fd)
3694 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3695 * but is needed also on machines without setreuid.
3696 * Seems safe enough to run as root.
3698 int check_okay = 0; /* able to do all the required sys/libcalls */
3699 int on_nosuid = 0; /* the fd is on a nosuid fs */
3701 * Need to check noexec also: nosuid might not be set, the average
3702 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3704 int on_noexec = 0; /* the fd is on a noexec fs */
3707 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3708 * fstatvfs() is UNIX98.
3709 * fstatfs() is 4.3 BSD.
3710 * ustat()+getmnt() is pre-4.3 BSD.
3711 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3712 * an irrelevant filesystem while trying to reach the right one.
3715 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3717 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3718 defined(HAS_FSTATVFS)
3719 # define FD_ON_NOSUID_CHECK_OKAY
3720 struct statvfs stfs;
3722 check_okay = fstatvfs(fd, &stfs) == 0;
3723 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3725 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3726 on platforms where it is present. */
3727 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3729 # endif /* fstatvfs */
3731 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3732 defined(PERL_MOUNT_NOSUID) && \
3733 defined(PERL_MOUNT_NOEXEC) && \
3734 defined(HAS_FSTATFS) && \
3735 defined(HAS_STRUCT_STATFS) && \
3736 defined(HAS_STRUCT_STATFS_F_FLAGS)
3737 # define FD_ON_NOSUID_CHECK_OKAY
3740 check_okay = fstatfs(fd, &stfs) == 0;
3741 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3742 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3743 # endif /* fstatfs */
3745 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3746 defined(PERL_MOUNT_NOSUID) && \
3747 defined(PERL_MOUNT_NOEXEC) && \
3748 defined(HAS_FSTAT) && \
3749 defined(HAS_USTAT) && \
3750 defined(HAS_GETMNT) && \
3751 defined(HAS_STRUCT_FS_DATA) && \
3753 # define FD_ON_NOSUID_CHECK_OKAY
3756 if (fstat(fd, &fdst) == 0) {
3758 if (ustat(fdst.st_dev, &us) == 0) {
3760 /* NOSTAT_ONE here because we're not examining fields which
3761 * vary between that case and STAT_ONE. */
3762 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3763 size_t cmplen = sizeof(us.f_fname);
3764 if (sizeof(fsd.fd_req.path) < cmplen)
3765 cmplen = sizeof(fsd.fd_req.path);
3766 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3767 fdst.st_dev == fsd.fd_req.dev) {
3769 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3770 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3775 # endif /* fstat+ustat+getmnt */
3777 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3778 defined(HAS_GETMNTENT) && \
3779 defined(HAS_HASMNTOPT) && \
3780 defined(MNTOPT_NOSUID) && \
3781 defined(MNTOPT_NOEXEC)
3782 # define FD_ON_NOSUID_CHECK_OKAY
3783 FILE *mtab = fopen("/etc/mtab", "r");
3784 struct mntent *entry;
3787 if (mtab && (fstat(fd, &stb) == 0)) {
3788 while (entry = getmntent(mtab)) {
3789 if (stat(entry->mnt_dir, &fsb) == 0
3790 && fsb.st_dev == stb.st_dev)
3792 /* found the filesystem */
3794 if (hasmntopt(entry, MNTOPT_NOSUID))
3796 if (hasmntopt(entry, MNTOPT_NOEXEC))
3799 } /* A single fs may well fail its stat(). */
3804 # endif /* getmntent+hasmntopt */
3807 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3809 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3811 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3812 return ((!check_okay) || on_nosuid || on_noexec);
3814 #endif /* IAMSUID */
3817 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3822 #endif /* IAMSUID */
3824 /* do we need to emulate setuid on scripts? */
3826 /* This code is for those BSD systems that have setuid #! scripts disabled
3827 * in the kernel because of a security problem. Merely defining DOSUID
3828 * in perl will not fix that problem, but if you have disabled setuid
3829 * scripts in the kernel, this will attempt to emulate setuid and setgid
3830 * on scripts that have those now-otherwise-useless bits set. The setuid
3831 * root version must be called suidperl or sperlN.NNN. If regular perl
3832 * discovers that it has opened a setuid script, it calls suidperl with
3833 * the same argv that it had. If suidperl finds that the script it has
3834 * just opened is NOT setuid root, it sets the effective uid back to the
3835 * uid. We don't just make perl setuid root because that loses the
3836 * effective uid we had before invoking perl, if it was different from the
3839 * Description/comments above do not match current workings:
3840 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3841 * suidperl called with script open and name changed to /dev/fd/N/X;
3842 * suidperl croaks if script is not setuid;
3843 * making perl setuid would be a huge security risk (and yes, that
3844 * would lose any euid we might have had).
3846 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3847 * be defined in suidperl only. suidperl must be setuid root. The
3848 * Configure script will set this up for you if you want it.
3854 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3855 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3856 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3858 const char *linestr;
3862 if (PL_fdscript < 0 || PL_suidscript != 1)
3863 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3865 * Since the script is opened by perl, not suidperl, some of these
3866 * checks are superfluous. Leaving them in probably does not lower
3870 * Do checks even for systems with no HAS_SETREUID.
3871 * We used to swap, then re-swap UIDs with
3873 if (setreuid(PL_euid,PL_uid) < 0
3874 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3875 Perl_croak(aTHX_ "Can't swap uid and euid");
3878 if (setreuid(PL_uid,PL_euid) < 0
3879 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3880 Perl_croak(aTHX_ "Can't reswap uid and euid");
3884 /* On this access check to make sure the directories are readable,
3885 * there is actually a small window that the user could use to make
3886 * filename point to an accessible directory. So there is a faint
3887 * chance that someone could execute a setuid script down in a
3888 * non-accessible directory. I don't know what to do about that.
3889 * But I don't think it's too important. The manual lies when
3890 * it says access() is useful in setuid programs.
3892 * So, access() is pretty useless... but not harmful... do anyway.
3894 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3895 Perl_croak(aTHX_ "Can't access() script\n");
3898 /* If we can swap euid and uid, then we can determine access rights
3899 * with a simple stat of the file, and then compare device and
3900 * inode to make sure we did stat() on the same file we opened.
3901 * Then we just have to make sure he or she can execute it.
3904 * As the script is opened by perl, not suidperl, we do not need to
3905 * care much about access rights.
3907 * The 'script changed' check is needed, or we can get lied to
3908 * about $0 with e.g.
3909 * suidperl /dev/fd/4//bin/x 4<setuidscript
3910 * Without HAS_SETREUID, is it safe to stat() as root?
3912 * Are there any operating systems that pass /dev/fd/xxx for setuid
3913 * scripts, as suggested/described in perlsec(1)? Surely they do not
3914 * pass the script name as we do, so the "script changed" test would
3915 * fail for them... but we never get here with
3916 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3918 * This is one place where we must "lie" about return status: not
3919 * say if the stat() failed. We are doing this as root, and could
3920 * be tricked into reporting existence or not of files that the
3921 * "plain" user cannot even see.
3925 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3926 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3927 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3928 Perl_croak(aTHX_ "Setuid script changed\n");
3932 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3933 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3936 * We used to do this check as the "plain" user (after swapping
3937 * UIDs). But the check for nosuid and noexec filesystem is needed,
3938 * and should be done even without HAS_SETREUID. (Maybe those
3939 * operating systems do not have such mount options anyway...)
3940 * Seems safe enough to do as root.
3942 #if !defined(NO_NOSUID_CHECK)
3943 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3944 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3947 #endif /* IAMSUID */
3949 if (!S_ISREG(PL_statbuf.st_mode)) {
3950 Perl_croak(aTHX_ "Setuid script not plain file\n");
3952 if (PL_statbuf.st_mode & S_IWOTH)
3953 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3954 PL_doswitches = FALSE; /* -s is insecure in suid */
3955 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3956 CopLINE_inc(PL_curcop);
3957 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch)
3958 Perl_croak(aTHX_ "No #! line");
3959 linestr = SvPV_nolen_const(PL_linestr);
3960 /* required even on Sys V */
3961 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3962 Perl_croak(aTHX_ "No #! line");
3966 /* Sanity check on line length */
3967 s_end = s + strlen(s);
3968 if (s_end == s || (s_end - s) > 4000)
3969 Perl_croak(aTHX_ "Very long #! line");
3970 /* Allow more than a single space after #! */
3971 while (isSPACE(*s)) s++;
3972 /* Sanity check on buffer end */
3973 while ((*s) && !isSPACE(*s)) s++;
3974 for (s2 = s; (s2 > linestr &&
3975 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3976 || s2[-1] == '-')); s2--) ;
3977 /* Sanity check on buffer start */
3978 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3979 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3980 Perl_croak(aTHX_ "Not a perl script");
3981 while (*s == ' ' || *s == '\t') s++;
3983 * #! arg must be what we saw above. They can invoke it by
3984 * mentioning suidperl explicitly, but they may not add any strange
3985 * arguments beyond what #! says if they do invoke suidperl that way.
3988 * The way validarg was set up, we rely on the kernel to start
3989 * scripts with argv[1] set to contain all #! line switches (the
3993 * Check that we got all the arguments listed in the #! line (not
3994 * just that there are no extraneous arguments). Might not matter
3995 * much, as switches from #! line seem to be acted upon (also), and
3996 * so may be checked and trapped in perl. But, security checks must
3997 * be done in suidperl and not deferred to perl. Note that suidperl
3998 * does not get around to parsing (and checking) the switches on
3999 * the #! line (but execs perl sooner).
4000 * Allow (require) a trailing newline (which may be of two
4001 * characters on some architectures?) (but no other trailing
4004 len = strlen(validarg);
4005 if (strEQ(validarg," PHOOEY ") ||
4006 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4007 !((s_end - s) == len+1
4008 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4009 Perl_croak(aTHX_ "Args must match #! line");
4012 if (PL_fdscript < 0 &&
4013 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4014 PL_euid == PL_statbuf.st_uid)
4016 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4017 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4018 #endif /* IAMSUID */
4020 if (PL_fdscript < 0 &&
4021 PL_euid) { /* oops, we're not the setuid root perl */
4023 * When root runs a setuid script, we do not go through the same
4024 * steps of execing sperl and then perl with fd scripts, but
4025 * simply set up UIDs within the same perl invocation; so do
4026 * not have the same checks (on options, whatever) that we have
4027 * for plain users. No problem really: would have to be a script
4028 * that does not actually work for plain users; and if root is
4029 * foolish and can be persuaded to run such an unsafe script, he
4030 * might run also non-setuid ones, and deserves what he gets.
4032 * Or, we might drop the PL_euid check above (and rely just on
4033 * PL_fdscript to avoid loops), and do the execs
4039 * Pass fd script to suidperl.
4040 * Exec suidperl, substituting fd script for scriptname.
4041 * Pass script name as "subdir" of fd, which perl will grok;
4042 * in fact will use that to distinguish this from "normal"
4043 * usage, see comments above.
4045 PerlIO_rewind(PL_rsfp);
4046 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4047 /* PSz 27 Feb 04 Sanity checks on scriptname */
4048 if ((!scriptname) || (!*scriptname) ) {
4049 Perl_croak(aTHX_ "No setuid script name\n");
4051 if (*scriptname == '-') {
4052 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4053 /* Or we might confuse it with an option when replacing
4054 * name in argument list, below (though we do pointer, not
4055 * string, comparisons).
4058 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4059 if (!PL_origargv[which]) {
4060 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4062 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4063 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4064 #if defined(HAS_FCNTL) && defined(F_SETFD)
4065 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4068 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4069 (int)PERL_REVISION, (int)PERL_VERSION,
4070 (int)PERL_SUBVERSION), PL_origargv);
4072 #endif /* IAMSUID */
4073 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4076 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4078 * This seems back to front: we try HAS_SETEGID first; if not available
4079 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4080 * in the sense that we only want to set EGID; but are there any machines
4081 * with either of the latter, but not the former? Same with UID, later.
4084 (void)setegid(PL_statbuf.st_gid);
4087 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4089 #ifdef HAS_SETRESGID
4090 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4092 PerlProc_setgid(PL_statbuf.st_gid);
4096 if (PerlProc_getegid() != PL_statbuf.st_gid)
4097 Perl_croak(aTHX_ "Can't do setegid!\n");
4099 if (PL_statbuf.st_mode & S_ISUID) {
4100 if (PL_statbuf.st_uid != PL_euid)
4102 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4105 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4107 #ifdef HAS_SETRESUID
4108 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4110 PerlProc_setuid(PL_statbuf.st_uid);
4114 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4115 Perl_croak(aTHX_ "Can't do seteuid!\n");
4117 else if (PL_uid) { /* oops, mustn't run as root */
4119 (void)seteuid((Uid_t)PL_uid);
4122 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4124 #ifdef HAS_SETRESUID
4125 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4127 PerlProc_setuid((Uid_t)PL_uid);
4131 if (PerlProc_geteuid() != PL_uid)
4132 Perl_croak(aTHX_ "Can't do seteuid!\n");
4135 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4136 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4139 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4140 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4141 else if (PL_fdscript < 0 || PL_suidscript != 1)
4142 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4143 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4145 /* PSz 16 Sep 03 Keep neat error message */
4146 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4149 /* We absolutely must clear out any saved ids here, so we */
4150 /* exec the real perl, substituting fd script for scriptname. */
4151 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4153 * It might be thought that using setresgid and/or setresuid (changed to
4154 * set the saved IDs) above might obviate the need to exec, and we could
4155 * go on to "do the perl thing".
4157 * Is there such a thing as "saved GID", and is that set for setuid (but
4158 * not setgid) execution like suidperl? Without exec, it would not be
4159 * cleared for setuid (but not setgid) scripts (or might need a dummy
4162 * We need suidperl to do the exact same argument checking that perl
4163 * does. Thus it cannot be very small; while it could be significantly
4164 * smaller, it is safer (simpler?) to make it essentially the same
4165 * binary as perl (but they are not identical). - Maybe could defer that
4166 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4167 * but prefer to do thorough checks in suidperl itself. Such deferral
4168 * would make suidperl security rely on perl, a design no-no.
4170 * Setuid things should be short and simple, thus easy to understand and
4171 * verify. They should do their "own thing", without influence by
4172 * attackers. It may help if their internal execution flow is fixed,
4173 * regardless of platform: it may be best to exec anyway.
4175 * Suidperl should at least be conceptually simple: a wrapper only,
4176 * never to do any real perl. Maybe we should put
4178 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4180 * into the perly bits.
4182 PerlIO_rewind(PL_rsfp);
4183 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4185 * Keep original arguments: suidperl already has fd script.
4187 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4188 /* if (!PL_origargv[which]) { */
4189 /* errno = EPERM; */
4190 /* Perl_croak(aTHX_ "Permission denied\n"); */
4192 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4193 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4194 #if defined(HAS_FCNTL) && defined(F_SETFD)
4195 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4198 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4199 (int)PERL_REVISION, (int)PERL_VERSION,
4200 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4202 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4203 #endif /* IAMSUID */
4205 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4206 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4207 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4208 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4210 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4213 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4214 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4215 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4216 /* not set-id, must be wrapped */
4224 S_find_beginning(pTHX)
4228 register const char *s2;
4229 #ifdef MACOS_TRADITIONAL
4233 /* skip forward in input to the real script? */
4236 #ifdef MACOS_TRADITIONAL
4237 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4239 while (PL_doextract || gMacPerl_AlwaysExtract) {
4240 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4241 if (!gMacPerl_AlwaysExtract)
4242 Perl_croak(aTHX_ "No Perl script found in input\n");
4244 if (PL_doextract) /* require explicit override ? */
4245 if (!OverrideExtract(PL_origfilename))
4246 Perl_croak(aTHX_ "User aborted script\n");
4248 PL_doextract = FALSE;
4250 /* Pater peccavi, file does not have #! */
4251 PerlIO_rewind(PL_rsfp);
4256 while (PL_doextract) {
4257 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4258 Perl_croak(aTHX_ "No Perl script found in input\n");
4261 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4262 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4263 PL_doextract = FALSE;
4264 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4266 while (*s == ' ' || *s == '\t') s++;
4268 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4269 || s2[-1] == '_') s2--;
4270 if (strnEQ(s2-4,"perl",4))
4271 while ((s = moreswitches(s)))
4274 #ifdef MACOS_TRADITIONAL
4275 /* We are always searching for the #!perl line in MacPerl,
4276 * so if we find it, still keep the line count correct
4277 * by counting lines we already skipped over
4279 for (; maclines > 0 ; maclines--)
4280 PerlIO_ungetc(PL_rsfp, '\n');
4284 /* gMacPerl_AlwaysExtract is false in MPW tool */
4285 } else if (gMacPerl_AlwaysExtract) {
4297 PL_uid = PerlProc_getuid();
4298 PL_euid = PerlProc_geteuid();
4299 PL_gid = PerlProc_getgid();
4300 PL_egid = PerlProc_getegid();
4302 PL_uid |= PL_gid << 16;
4303 PL_euid |= PL_egid << 16;
4305 /* Should not happen: */
4306 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4307 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4310 * Should go by suidscript, not uid!=euid: why disallow
4311 * system("ls") in scripts run from setuid things?
4312 * Or, is this run before we check arguments and set suidscript?
4313 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4314 * (We never have suidscript, can we be sure to have fdscript?)
4315 * Or must then go by UID checks? See comments in forbid_setid also.
4319 /* This is used very early in the lifetime of the program,
4320 * before even the options are parsed, so PL_tainting has
4321 * not been initialized properly. */
4323 Perl_doing_taint(int argc, char *argv[], char *envp[])
4325 #ifndef PERL_IMPLICIT_SYS
4326 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4327 * before we have an interpreter-- and the whole point of this
4328 * function is to be called at such an early stage. If you are on
4329 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4330 * "tainted because running with altered effective ids', you'll
4331 * have to add your own checks somewhere in here. The two most
4332 * known samples of 'implicitness' are Win32 and NetWare, neither
4333 * of which has much of concept of 'uids'. */
4334 int uid = PerlProc_getuid();
4335 int euid = PerlProc_geteuid();
4336 int gid = PerlProc_getgid();
4337 int egid = PerlProc_getegid();
4344 if (uid && (euid != uid || egid != gid))
4346 #endif /* !PERL_IMPLICIT_SYS */
4347 /* This is a really primitive check; environment gets ignored only
4348 * if -T are the first chars together; otherwise one gets
4349 * "Too late" message. */
4350 if ( argc > 1 && argv[1][0] == '-'
4351 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4357 S_forbid_setid(pTHX_ const char *s)
4360 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4361 if (PL_euid != PL_uid)
4362 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4363 if (PL_egid != PL_gid)
4364 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4365 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4367 * Checks for UID/GID above "wrong": why disallow
4368 * perl -e 'print "Hello\n"'
4369 * from within setuid things?? Simply drop them: replaced by
4370 * fdscript/suidscript and #ifdef IAMSUID checks below.
4372 * This may be too late for command-line switches. Will catch those on
4373 * the #! line, after finding the script name and setting up
4374 * fdscript/suidscript. Note that suidperl does not get around to
4375 * parsing (and checking) the switches on the #! line, but checks that
4376 * the two sets are identical.
4378 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4379 * instead, or would that be "too late"? (We never have suidscript, can
4380 * we be sure to have fdscript?)
4382 * Catch things with suidscript (in descendant of suidperl), even with
4383 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4384 * below; but I am paranoid.
4386 * Also see comments about root running a setuid script, elsewhere.
4388 if (PL_suidscript >= 0)
4389 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4391 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4392 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4393 #endif /* IAMSUID */
4397 Perl_init_debugger(pTHX)
4400 HV * const ostash = PL_curstash;
4402 PL_curstash = PL_debstash;
4403 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4405 AvREAL_off(PL_dbargs);
4406 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4407 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4408 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4409 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4410 sv_setiv(PL_DBsingle, 0);
4411 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4412 sv_setiv(PL_DBtrace, 0);
4413 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4414 sv_setiv(PL_DBsignal, 0);
4415 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4416 sv_setiv(PL_DBassertion, 0);
4417 PL_curstash = ostash;
4420 #ifndef STRESS_REALLOC
4421 #define REASONABLE(size) (size)
4423 #define REASONABLE(size) (1) /* unreasonable */
4427 Perl_init_stacks(pTHX)
4430 /* start with 128-item stack and 8K cxstack */
4431 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4432 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4433 PL_curstackinfo->si_type = PERLSI_MAIN;
4434 PL_curstack = PL_curstackinfo->si_stack;
4435 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4437 PL_stack_base = AvARRAY(PL_curstack);
4438 PL_stack_sp = PL_stack_base;
4439 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4441 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4444 PL_tmps_max = REASONABLE(128);
4446 Newx(PL_markstack,REASONABLE(32),I32);
4447 PL_markstack_ptr = PL_markstack;
4448 PL_markstack_max = PL_markstack + REASONABLE(32);
4452 Newx(PL_scopestack,REASONABLE(32),I32);
4453 PL_scopestack_ix = 0;
4454 PL_scopestack_max = REASONABLE(32);
4456 Newx(PL_savestack,REASONABLE(128),ANY);
4457 PL_savestack_ix = 0;
4458 PL_savestack_max = REASONABLE(128);
4467 while (PL_curstackinfo->si_next)
4468 PL_curstackinfo = PL_curstackinfo->si_next;
4469 while (PL_curstackinfo) {
4470 PERL_SI *p = PL_curstackinfo->si_prev;
4471 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4472 Safefree(PL_curstackinfo->si_cxstack);
4473 Safefree(PL_curstackinfo);
4474 PL_curstackinfo = p;
4476 Safefree(PL_tmps_stack);
4477 Safefree(PL_markstack);
4478 Safefree(PL_scopestack);
4479 Safefree(PL_savestack);
4489 lex_start(PL_linestr);
4491 PL_subname = newSVpvs("main");
4495 S_init_predump_symbols(pTHX)
4501 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4502 PL_stdingv = gv_fetchpvs("STDIN",TRUE, SVt_PVIO);
4503 GvMULTI_on(PL_stdingv);
4504 io = GvIOp(PL_stdingv);
4505 IoTYPE(io) = IoTYPE_RDONLY;
4506 IoIFP(io) = PerlIO_stdin();
4507 tmpgv = gv_fetchpvs("stdin",TRUE, SVt_PV);
4509 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4511 tmpgv = gv_fetchpvs("STDOUT",TRUE, SVt_PVIO);
4514 IoTYPE(io) = IoTYPE_WRONLY;
4515 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4517 tmpgv = gv_fetchpvs("stdout",TRUE, SVt_PV);
4519 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4521 PL_stderrgv = gv_fetchpvs("STDERR",TRUE, SVt_PVIO);
4522 GvMULTI_on(PL_stderrgv);
4523 io = GvIOp(PL_stderrgv);
4524 IoTYPE(io) = IoTYPE_WRONLY;
4525 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4526 tmpgv = gv_fetchpvs("stderr",TRUE, SVt_PV);
4528 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4530 PL_statname = newSV(0); /* last filename we did stat on */
4532 Safefree(PL_osname);
4533 PL_osname = savepv(OSNAME);
4537 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4540 argc--,argv++; /* skip name of script */
4541 if (PL_doswitches) {
4542 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4546 if (argv[0][1] == '-' && !argv[0][2]) {
4550 if ((s = strchr(argv[0], '='))) {
4552 sv_setpv(GvSV(gv_fetchpv(argv[0] + 1, TRUE, SVt_PV)), s + 1);
4556 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4559 if ((PL_argvgv = gv_fetchpvs("ARGV",TRUE, SVt_PVAV))) {
4560 GvMULTI_on(PL_argvgv);
4561 (void)gv_AVadd(PL_argvgv);
4562 av_clear(GvAVn(PL_argvgv));
4563 for (; argc > 0; argc--,argv++) {
4564 SV * const sv = newSVpv(argv[0],0);
4565 av_push(GvAVn(PL_argvgv),sv);
4566 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4567 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4570 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4571 (void)sv_utf8_decode(sv);
4577 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4582 PL_toptarget = newSV(0);
4583 sv_upgrade(PL_toptarget, SVt_PVFM);
4584 sv_setpvn(PL_toptarget, "", 0);
4585 PL_bodytarget = newSV(0);
4586 sv_upgrade(PL_bodytarget, SVt_PVFM);
4587 sv_setpvn(PL_bodytarget, "", 0);
4588 PL_formtarget = PL_bodytarget;
4592 init_argv_symbols(argc,argv);
4594 if ((tmpgv = gv_fetchpvs("0",TRUE, SVt_PV))) {
4595 #ifdef MACOS_TRADITIONAL
4596 /* $0 is not majick on a Mac */
4597 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4599 sv_setpv(GvSV(tmpgv),PL_origfilename);
4600 magicname("0", "0", 1);
4603 if ((PL_envgv = gv_fetchpvs("ENV",TRUE, SVt_PVHV))) {
4605 GvMULTI_on(PL_envgv);
4606 hv = GvHVn(PL_envgv);
4607 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4609 #ifdef USE_ENVIRON_ARRAY
4610 /* Note that if the supplied env parameter is actually a copy
4611 of the global environ then it may now point to free'd memory
4612 if the environment has been modified since. To avoid this
4613 problem we treat env==NULL as meaning 'use the default'
4618 # ifdef USE_ITHREADS
4619 && PL_curinterp == aTHX
4623 environ[0] = Nullch;
4626 char** origenv = environ;
4629 for (; *env; env++) {
4630 if (!(s = strchr(*env,'=')) || s == *env)
4632 #if defined(MSDOS) && !defined(DJGPP)
4637 sv = newSVpv(s+1, 0);
4638 (void)hv_store(hv, *env, s - *env, sv, 0);
4641 if (origenv != environ) {
4642 /* realloc has shifted us */
4643 env = (env - origenv) + environ;
4648 #endif /* USE_ENVIRON_ARRAY */
4649 #endif /* !PERL_MICRO */
4652 if ((tmpgv = gv_fetchpvs("$",TRUE, SVt_PV))) {
4653 SvREADONLY_off(GvSV(tmpgv));
4654 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4655 SvREADONLY_on(GvSV(tmpgv));
4657 #ifdef THREADS_HAVE_PIDS
4658 PL_ppid = (IV)getppid();
4661 /* touch @F array to prevent spurious warnings 20020415 MJD */
4663 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4665 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4666 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4667 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4671 S_init_perllib(pTHX)
4677 s = PerlEnv_getenv("PERL5LIB");
4679 * It isn't possible to delete an environment variable with
4680 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4681 * case we treat PERL5LIB as undefined if it has a zero-length value.
4683 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4684 if (s && *s != '\0')
4688 incpush(s, TRUE, TRUE, TRUE, FALSE);
4690 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4692 /* Treat PERL5?LIB as a possible search list logical name -- the
4693 * "natural" VMS idiom for a Unix path string. We allow each
4694 * element to be a set of |-separated directories for compatibility.
4698 if (my_trnlnm("PERL5LIB",buf,0))
4699 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4701 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4705 /* Use the ~-expanded versions of APPLLIB (undocumented),
4706 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4709 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4713 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4715 #ifdef MACOS_TRADITIONAL
4718 SV * privdir = newSV(0);
4719 char * macperl = PerlEnv_getenv("MACPERL");
4724 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4725 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4726 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4727 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4728 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4729 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4731 SvREFCNT_dec(privdir);
4734 incpush(":", FALSE, FALSE, TRUE, FALSE);
4737 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4740 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4742 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4746 /* sitearch is always relative to sitelib on Windows for
4747 * DLL-based path intuition to work correctly */
4748 # if !defined(WIN32)
4749 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4755 /* this picks up sitearch as well */
4756 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4758 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4762 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4763 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4766 #ifdef PERL_VENDORARCH_EXP
4767 /* vendorarch is always relative to vendorlib on Windows for
4768 * DLL-based path intuition to work correctly */
4769 # if !defined(WIN32)
4770 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4774 #ifdef PERL_VENDORLIB_EXP
4776 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4778 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4782 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4783 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4786 #ifdef PERL_OTHERLIBDIRS
4787 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4791 incpush(".", FALSE, FALSE, TRUE, FALSE);
4792 #endif /* MACOS_TRADITIONAL */
4795 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4796 # define PERLLIB_SEP ';'
4799 # define PERLLIB_SEP '|'
4801 # if defined(MACOS_TRADITIONAL)
4802 # define PERLLIB_SEP ','
4804 # define PERLLIB_SEP ':'
4808 #ifndef PERLLIB_MANGLE
4809 # define PERLLIB_MANGLE(s,n) (s)
4812 /* Push a directory onto @INC if it exists.
4813 Generate a new SV if we do this, to save needing to copy the SV we push
4816 S_incpush_if_exists(pTHX_ SV *dir)
4820 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4821 S_ISDIR(tmpstatbuf.st_mode)) {
4822 av_push(GvAVn(PL_incgv), dir);
4829 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4833 SV *subdir = Nullsv;
4834 const char *p = dir;
4839 if (addsubdirs || addoldvers) {
4843 /* Break at all separators */
4845 SV *libdir = newSV(0);
4848 /* skip any consecutive separators */
4850 while ( *p == PERLLIB_SEP ) {
4851 /* Uncomment the next line for PATH semantics */
4852 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4857 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4858 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4863 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4864 p = Nullch; /* break out */
4866 #ifdef MACOS_TRADITIONAL
4867 if (!strchr(SvPVX(libdir), ':')) {
4870 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4872 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4873 sv_catpvs(libdir, ":");
4876 /* Do the if() outside the #ifdef to avoid warnings about an unused
4879 #ifdef PERL_RELOCATABLE_INC
4881 * Relocatable include entries are marked with a leading .../
4884 * 0: Remove that leading ".../"
4885 * 1: Remove trailing executable name (anything after the last '/')
4886 * from the perl path to give a perl prefix
4888 * While the @INC element starts "../" and the prefix ends with a real
4889 * directory (ie not . or ..) chop that real directory off the prefix
4890 * and the leading "../" from the @INC element. ie a logical "../"
4892 * Finally concatenate the prefix and the remainder of the @INC element
4893 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4894 * generates /usr/local/lib/perl5
4896 const char *libpath = SvPVX(libdir);
4897 STRLEN libpath_len = SvCUR(libdir);
4898 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4900 SV * const caret_X = get_sv("\030", 0);
4901 /* Going to use the SV just as a scratch buffer holding a C
4907 /* $^X is *the* source of taint if tainting is on, hence
4908 SvPOK() won't be true. */
4910 assert(SvPOKp(caret_X));
4911 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4912 /* Firstly take off the leading .../
4913 If all else fail we'll do the paths relative to the current
4915 sv_chop(libdir, libpath + 4);
4916 /* Don't use SvPV as we're intentionally bypassing taining,
4917 mortal copies that the mg_get of tainting creates, and
4918 corruption that seems to come via the save stack.
4919 I guess that the save stack isn't correctly set up yet. */
4920 libpath = SvPVX(libdir);
4921 libpath_len = SvCUR(libdir);
4923 /* This would work more efficiently with memrchr, but as it's
4924 only a GNU extension we'd need to probe for it and
4925 implement our own. Not hard, but maybe not worth it? */
4927 prefix = SvPVX(prefix_sv);
4928 lastslash = strrchr(prefix, '/');
4930 /* First time in with the *lastslash = '\0' we just wipe off
4931 the trailing /perl from (say) /usr/foo/bin/perl
4935 while ((*lastslash = '\0'), /* Do that, come what may. */
4936 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4937 && (lastslash = strrchr(prefix, '/')))) {
4938 if (lastslash[1] == '\0'
4939 || (lastslash[1] == '.'
4940 && (lastslash[2] == '/' /* ends "/." */
4941 || (lastslash[2] == '/'
4942 && lastslash[3] == '/' /* or "/.." */
4944 /* Prefix ends "/" or "/." or "/..", any of which
4945 are fishy, so don't do any more logical cleanup.
4949 /* Remove leading "../" from path */
4952 /* Next iteration round the loop removes the last
4953 directory name from prefix by writing a '\0' in
4954 the while clause. */
4956 /* prefix has been terminated with a '\0' to the correct
4957 length. libpath points somewhere into the libdir SV.
4958 We need to join the 2 with '/' and drop the result into
4960 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4961 SvREFCNT_dec(libdir);
4962 /* And this is the new libdir. */
4965 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4966 /* Need to taint reloccated paths if running set ID */
4967 SvTAINTED_on(libdir);
4970 SvREFCNT_dec(prefix_sv);
4975 * BEFORE pushing libdir onto @INC we may first push version- and
4976 * archname-specific sub-directories.
4978 if (addsubdirs || addoldvers) {
4979 #ifdef PERL_INC_VERSION_LIST
4980 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4981 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4982 const char * const *incver;
4988 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4990 while (unix[len-1] == '/') len--; /* Cosmetic */
4991 sv_usepvn(libdir,unix,len);
4994 PerlIO_printf(Perl_error_log,
4995 "Failed to unixify @INC element \"%s\"\n",
4999 #ifdef MACOS_TRADITIONAL
5000 #define PERL_AV_SUFFIX_FMT ""
5001 #define PERL_ARCH_FMT "%s:"
5002 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5004 #define PERL_AV_SUFFIX_FMT "/"
5005 #define PERL_ARCH_FMT "/%s"
5006 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5008 /* .../version/archname if -d .../version/archname */
5009 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5011 (int)PERL_REVISION, (int)PERL_VERSION,
5012 (int)PERL_SUBVERSION, ARCHNAME);
5013 subdir = S_incpush_if_exists(aTHX_ subdir);
5015 /* .../version if -d .../version */
5016 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5017 (int)PERL_REVISION, (int)PERL_VERSION,
5018 (int)PERL_SUBVERSION);
5019 subdir = S_incpush_if_exists(aTHX_ subdir);
5021 /* .../archname if -d .../archname */
5022 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5023 subdir = S_incpush_if_exists(aTHX_ subdir);
5027 #ifdef PERL_INC_VERSION_LIST
5029 for (incver = incverlist; *incver; incver++) {
5030 /* .../xxx if -d .../xxx */
5031 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5032 subdir = S_incpush_if_exists(aTHX_ subdir);
5038 /* finally push this lib directory on the end of @INC */
5039 av_push(GvAVn(PL_incgv), libdir);
5042 assert (SvREFCNT(subdir) == 1);
5043 SvREFCNT_dec(subdir);
5047 #ifdef USE_5005THREADS
5048 STATIC struct perl_thread *
5049 S_init_main_thread(pTHX)
5051 #if !defined(PERL_IMPLICIT_CONTEXT)
5052 struct perl_thread *thr;
5056 Newxz(thr, 1, struct perl_thread);
5057 PL_curcop = &PL_compiling;
5058 thr->interp = PERL_GET_INTERP;
5059 thr->cvcache = newHV();
5060 thr->threadsv = newAV();
5061 /* thr->threadsvp is set when find_threadsv is called */
5062 thr->specific = newAV();
5063 thr->flags = THRf_R_JOINABLE;
5064 MUTEX_INIT(&thr->mutex);
5065 /* Handcraft thrsv similarly to mess_sv */
5066 Newx(PL_thrsv, 1, SV);
5068 SvFLAGS(PL_thrsv) = SVt_PV;
5069 SvANY(PL_thrsv) = (void*)xpv;
5070 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5071 SvPV_set(PL_thrsvr, (char*)thr);
5072 SvCUR_set(PL_thrsv, sizeof(thr));
5073 SvLEN_set(PL_thrsv, sizeof(thr));
5074 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5075 thr->oursv = PL_thrsv;
5076 PL_chopset = " \n-";
5079 MUTEX_LOCK(&PL_threads_mutex);
5085 MUTEX_UNLOCK(&PL_threads_mutex);
5087 #ifdef HAVE_THREAD_INTERN
5088 Perl_init_thread_intern(thr);
5091 #ifdef SET_THREAD_SELF
5092 SET_THREAD_SELF(thr);
5094 thr->self = pthread_self();
5095 #endif /* SET_THREAD_SELF */
5099 * These must come after the thread self setting
5100 * because sv_setpvn does SvTAINT and the taint
5101 * fields thread selfness being set.
5103 PL_toptarget = newSV(0);
5104 sv_upgrade(PL_toptarget, SVt_PVFM);
5105 sv_setpvn(PL_toptarget, "", 0);
5106 PL_bodytarget = newSV(0);
5107 sv_upgrade(PL_bodytarget, SVt_PVFM);
5108 sv_setpvn(PL_bodytarget, "", 0);
5109 PL_formtarget = PL_bodytarget;
5110 thr->errsv = newSVpvs("");
5111 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5114 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5115 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5116 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5117 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5118 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5119 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5121 PL_reginterp_cnt = 0;
5125 #endif /* USE_5005THREADS */
5128 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5132 const line_t oldline = CopLINE(PL_curcop);
5138 while (av_len(paramList) >= 0) {
5139 cv = (CV*)av_shift(paramList);
5141 if (paramList == PL_beginav) {
5142 /* save PL_beginav for compiler */
5143 if (! PL_beginav_save)
5144 PL_beginav_save = newAV();
5145 av_push(PL_beginav_save, (SV*)cv);
5147 else if (paramList == PL_checkav) {
5148 /* save PL_checkav for compiler */
5149 if (! PL_checkav_save)
5150 PL_checkav_save = newAV();
5151 av_push(PL_checkav_save, (SV*)cv);
5161 (void)SvPV_const(atsv, len);
5163 PL_curcop = &PL_compiling;
5164 CopLINE_set(PL_curcop, oldline);
5165 if (paramList == PL_beginav)
5166 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5168 Perl_sv_catpvf(aTHX_ atsv,
5169 "%s failed--call queue aborted",
5170 paramList == PL_checkav ? "CHECK"
5171 : paramList == PL_initav ? "INIT"
5173 while (PL_scopestack_ix > oldscope)
5176 Perl_croak(aTHX_ "%"SVf"", atsv);
5183 /* my_exit() was called */
5184 while (PL_scopestack_ix > oldscope)
5187 PL_curstash = PL_defstash;
5188 PL_curcop = &PL_compiling;
5189 CopLINE_set(PL_curcop, oldline);
5191 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5192 if (paramList == PL_beginav)
5193 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5195 Perl_croak(aTHX_ "%s failed--call queue aborted",
5196 paramList == PL_checkav ? "CHECK"
5197 : paramList == PL_initav ? "INIT"
5204 PL_curcop = &PL_compiling;
5205 CopLINE_set(PL_curcop, oldline);
5208 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5217 S_call_list_body(pTHX_ CV *cv)
5220 PUSHMARK(PL_stack_sp);
5221 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5226 Perl_my_exit(pTHX_ U32 status)
5229 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5230 thr, (unsigned long) status));
5239 STATUS_EXIT_SET(status);
5246 Perl_my_failure_exit(pTHX)
5250 /* We have been called to fall on our sword. The desired exit code
5251 * should be already set in STATUS_UNIX, but could be shifted over
5252 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5255 * If an error code has not been set, then force the issue.
5257 if (MY_POSIX_EXIT) {
5259 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5260 * the exit code when there isn't an error.
5263 if (STATUS_UNIX == 0)
5264 STATUS_UNIX_EXIT_SET(255);
5266 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5268 /* The exit code could have been set by $? or vmsish which
5269 * means that it may not be fatal. So convert
5270 * success/warning codes to fatal.
5272 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5273 STATUS_UNIX_EXIT_SET(255);
5277 /* Traditionally Perl on VMS always expects a Fatal Error. */
5278 if (vaxc$errno & 1) {
5280 /* So force success status to failure */
5281 if (STATUS_NATIVE & 1)
5286 STATUS_UNIX = EINTR; /* In case something cares */
5291 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5293 /* Encode the severity code */
5294 severity = STATUS_NATIVE & STS$M_SEVERITY;
5295 STATUS_UNIX = (severity ? severity : 1) << 8;
5297 /* Perl expects this to be a fatal error */
5298 if (severity != STS$K_SEVERE)
5307 STATUS_UNIX_SET(errno);
5309 exitstatus = STATUS_UNIX >> 8;
5310 if (exitstatus & 255)
5311 STATUS_UNIX_SET(exitstatus);
5313 STATUS_UNIX_SET(255);
5320 S_my_exit_jump(pTHX)
5323 register PERL_CONTEXT *cx;
5328 SvREFCNT_dec(PL_e_script);
5329 PL_e_script = Nullsv;
5332 POPSTACK_TO(PL_mainstack);
5333 if (cxstack_ix >= 0) {
5336 POPBLOCK(cx,PL_curpm);
5341 PERL_UNUSED_VAR(gimme);
5342 PERL_UNUSED_VAR(newsp);
5346 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5349 const char * const p = SvPVX_const(PL_e_script);
5350 const char *nl = strchr(p, '\n');
5352 PERL_UNUSED_ARG(idx);
5353 PERL_UNUSED_ARG(maxlen);
5355 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5357 filter_del(read_e_script);
5360 sv_catpvn(buf_sv, p, nl-p);
5361 sv_chop(PL_e_script, nl);
5367 * c-indentation-style: bsd
5369 * indent-tabs-mode: t
5372 * ex: set ts=8 sts=4 sw=4 noet: