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(65,79);
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)
1338 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1339 PL_exitlist[PL_exitlistlen].fn = fn;
1340 PL_exitlist[PL_exitlistlen].ptr = ptr;
1344 #ifdef HAS_PROCSELFEXE
1345 /* This is a function so that we don't hold on to MAXPATHLEN
1346 bytes of stack longer than necessary
1349 S_procself_val(pTHX_ SV *sv, const char *arg0)
1351 char buf[MAXPATHLEN];
1352 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1354 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1355 includes a spurious NUL which will cause $^X to fail in system
1356 or backticks (this will prevent extensions from being built and
1357 many tests from working). readlink is not meant to add a NUL.
1358 Normal readlink works fine.
1360 if (len > 0 && buf[len-1] == '\0') {
1364 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1365 returning the text "unknown" from the readlink rather than the path
1366 to the executable (or returning an error from the readlink). Any valid
1367 path has a '/' in it somewhere, so use that to validate the result.
1368 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1370 if (len > 0 && memchr(buf, '/', len)) {
1371 sv_setpvn(sv,buf,len);
1377 #endif /* HAS_PROCSELFEXE */
1380 S_set_caret_X(pTHX) {
1381 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1383 #ifdef HAS_PROCSELFEXE
1384 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1387 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1389 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1396 =for apidoc perl_parse
1398 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1404 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1411 PERL_UNUSED_VAR(my_perl);
1413 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1416 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1417 setuid perl scripts securely.\n");
1418 #endif /* IAMSUID */
1421 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1422 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1423 * This MUST be done before any hash stores or fetches take place.
1424 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1425 * yourself, it is your responsibility to provide a good random seed!
1426 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1427 if (!PL_rehash_seed_set)
1428 PL_rehash_seed = get_hash_seed();
1430 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1432 if (s && (atoi(s) == 1))
1433 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1435 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1441 /* Set PL_origalen be the sum of the contiguous argv[]
1442 * elements plus the size of the env in case that it is
1443 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1444 * as the maximum modifiable length of $0. In the worst case
1445 * the area we are able to modify is limited to the size of
1446 * the original argv[0]. (See below for 'contiguous', though.)
1448 const char *s = NULL;
1451 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1452 /* Do the mask check only if the args seem like aligned. */
1454 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1456 /* See if all the arguments are contiguous in memory. Note
1457 * that 'contiguous' is a loose term because some platforms
1458 * align the argv[] and the envp[]. If the arguments look
1459 * like non-aligned, assume that they are 'strictly' or
1460 * 'traditionally' contiguous. If the arguments look like
1461 * aligned, we just check that they are within aligned
1462 * PTRSIZE bytes. As long as no system has something bizarre
1463 * like the argv[] interleaved with some other data, we are
1464 * fine. (Did I just evoke Murphy's Law?) --jhi */
1465 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1467 for (i = 1; i < PL_origargc; i++) {
1468 if ((PL_origargv[i] == s + 1
1470 || PL_origargv[i] == s + 2
1475 (PL_origargv[i] > s &&
1477 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1487 /* Can we grab env area too to be used as the area for $0? */
1488 if (PL_origenviron) {
1489 if ((PL_origenviron[0] == s + 1
1491 || (PL_origenviron[0] == s + 9 && (s += 8))
1496 (PL_origenviron[0] > s &&
1497 PL_origenviron[0] <=
1498 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1502 s = PL_origenviron[0];
1505 my_setenv("NoNe SuCh", Nullch);
1506 /* Force copy of environment. */
1507 for (i = 1; PL_origenviron[i]; i++) {
1508 if (PL_origenviron[i] == s + 1
1511 (PL_origenviron[i] > s &&
1512 PL_origenviron[i] <=
1513 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1516 s = PL_origenviron[i];
1524 PL_origalen = s - PL_origargv[0] + 1;
1529 /* Come here if running an undumped a.out. */
1531 PL_origfilename = savepv(argv[0]);
1532 PL_do_undump = FALSE;
1533 cxstack_ix = -1; /* start label stack again */
1535 assert (!PL_tainted);
1537 S_set_caret_X(aTHX);
1539 init_postdump_symbols(argc,argv,env);
1544 op_free(PL_main_root);
1545 PL_main_root = Nullop;
1547 PL_main_start = Nullop;
1548 SvREFCNT_dec(PL_main_cv);
1549 PL_main_cv = Nullcv;
1552 oldscope = PL_scopestack_ix;
1553 PL_dowarn = G_WARN_OFF;
1558 parse_body(env,xsinit);
1560 call_list(oldscope, PL_checkav);
1567 /* my_exit() was called */
1568 while (PL_scopestack_ix > oldscope)
1571 PL_curstash = PL_defstash;
1573 call_list(oldscope, PL_checkav);
1577 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1586 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1589 int argc = PL_origargc;
1590 char **argv = PL_origargv;
1591 const char *scriptname = NULL;
1592 VOL bool dosearch = FALSE;
1593 const char *validarg = "";
1596 const char *cddir = Nullch;
1597 #ifdef USE_SITECUSTOMIZE
1598 bool minus_f = FALSE;
1603 sv_setpvn(PL_linestr,"",0);
1604 sv = newSVpvs(""); /* first used for -I flags */
1608 for (argc--,argv++; argc > 0; argc--,argv++) {
1609 if (argv[0][0] != '-' || !argv[0][1])
1613 validarg = " PHOOEY ";
1617 * Can we rely on the kernel to start scripts with argv[1] set to
1618 * contain all #! line switches (the whole line)? (argv[0] is set to
1619 * the interpreter name, argv[2] to the script name; argv[3] and
1620 * above may contain other arguments.)
1627 #ifndef PERL_STRICT_CR
1652 if ((s = moreswitches(s)))
1657 CHECK_MALLOC_TOO_LATE_FOR('t');
1658 if( !PL_tainting ) {
1659 PL_taint_warn = TRUE;
1665 CHECK_MALLOC_TOO_LATE_FOR('T');
1667 PL_taint_warn = FALSE;
1675 #ifdef MACOS_TRADITIONAL
1676 /* ignore -e for Dev:Pseudo argument */
1677 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1682 PL_e_script = newSVpvs("");
1683 filter_add(read_e_script, NULL);
1686 sv_catpv(PL_e_script, s);
1688 sv_catpv(PL_e_script, argv[1]);
1692 Perl_croak(aTHX_ "No code specified for -%c", *s);
1693 sv_catpvs(PL_e_script, "\n");
1697 #ifdef USE_SITECUSTOMIZE
1703 case 'I': /* -I handled both here and in moreswitches() */
1705 if (!*++s && (s=argv[1]) != Nullch) {
1709 STRLEN len = strlen(s);
1710 const char * const p = savepvn(s, len);
1711 incpush(p, TRUE, TRUE, FALSE, FALSE);
1712 sv_catpvs(sv, "-I");
1713 sv_catpvn(sv, p, len);
1718 Perl_croak(aTHX_ "No directory specified for -I");
1722 PL_preprocess = TRUE;
1735 PL_preambleav = newAV();
1736 av_push(PL_preambleav,
1737 newSVpvs("use Config;"));
1741 opts_prog = newSVpvs("print Config::myconfig(),");
1743 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1745 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1747 opts = SvCUR(opts_prog);
1749 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1753 # ifdef DEBUG_LEAKING_SCALARS
1754 " DEBUG_LEAKING_SCALARS"
1756 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1757 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1759 # ifdef FAKE_THREADS
1762 # ifdef MULTIPLICITY
1771 # ifdef PERL_DONT_CREATE_GVSV
1772 " PERL_DONT_CREATE_GVSV"
1774 # ifdef PERL_GLOBAL_STRUCT
1775 " PERL_GLOBAL_STRUCT"
1777 # ifdef PERL_IMPLICIT_CONTEXT
1778 " PERL_IMPLICIT_CONTEXT"
1780 # ifdef PERL_IMPLICIT_SYS
1781 " PERL_IMPLICIT_SYS"
1783 # ifdef PERL_MALLOC_WRAP
1786 # ifdef PERL_NEED_APPCTX
1789 # ifdef PERL_NEED_TIMESBASE
1790 " PERL_NEED_TIMESBASE"
1792 # ifdef PERL_OLD_COPY_ON_WRITE
1793 " PERL_OLD_COPY_ON_WRITE"
1795 # ifdef PERL_TRACK_MEMPOOL
1796 " PERL_TRACK_MEMPOOL"
1798 # ifdef PERL_USE_SAFE_PUTENV
1799 " PERL_USE_SAFE_PUTENV"
1801 #ifdef PERL_USES_PL_PIDSTATUS
1802 " PERL_USES_PL_PIDSTATUS"
1804 # ifdef PL_OP_SLAB_ALLOC
1807 # ifdef SPRINTF_RETURNS_STRLEN
1808 " SPRINTF_RETURNS_STRLEN"
1810 # ifdef THREADS_HAVE_PIDS
1811 " THREADS_HAVE_PIDS"
1813 # ifdef USE_5005THREADS
1816 # ifdef USE_64_BIT_ALL
1819 # ifdef USE_64_BIT_INT
1822 # ifdef USE_ITHREADS
1825 # ifdef USE_LARGE_FILES
1828 # ifdef USE_LONG_DOUBLE
1834 # ifdef USE_REENTRANT_API
1835 " USE_REENTRANT_API"
1840 # ifdef USE_SITECUSTOMIZE
1841 " USE_SITECUSTOMIZE"
1848 while (SvCUR(opts_prog) > opts+76) {
1849 /* find last space after "options: " and before col 76
1853 char * const pv = SvPV_nolen(opts_prog);
1854 const char c = pv[opts+76];
1856 space = strrchr(pv+opts+26, ' ');
1858 if (!space) break; /* "Can't happen" */
1860 /* break the line before that space */
1863 sv_insert(opts_prog, opts, 0,
1864 STR_WITH_LEN("\\n "));
1867 sv_catpvs(opts_prog,"\\n\",");
1869 #if defined(LOCAL_PATCH_COUNT)
1870 if (LOCAL_PATCH_COUNT > 0) {
1872 sv_catpvs(opts_prog,
1873 "\" Locally applied patches:\\n\",");
1874 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1875 if (PL_localpatches[i])
1876 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1877 0, PL_localpatches[i], 0);
1881 Perl_sv_catpvf(aTHX_ opts_prog,
1882 "\" Built under %s\\n\"",OSNAME);
1885 Perl_sv_catpvf(aTHX_ opts_prog,
1886 ",\" Compiled at %s %s\\n\"",__DATE__,
1889 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1893 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1894 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1895 "sort grep {/^PERL/} keys %ENV; ");
1897 sv_catpvs(opts_prog,
1898 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1900 sv_catpvs(opts_prog,
1901 "print \" \\%ENV:\\n @env\\n\" if @env;"
1902 "print \" \\@INC:\\n @INC\\n\";");
1906 opts_prog = Perl_newSVpvf(aTHX_
1907 "Config::config_vars(qw%c%s%c)",
1911 av_push(PL_preambleav, opts_prog);
1912 /* don't look for script or read stdin */
1913 scriptname = BIT_BUCKET;
1917 PL_doextract = TRUE;
1925 if (!*++s || isSPACE(*s)) {
1929 /* catch use of gnu style long options */
1930 if (strEQ(s, "version")) {
1934 if (strEQ(s, "help")) {
1941 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1947 #ifndef SECURE_INTERNAL_GETENV
1950 (s = PerlEnv_getenv("PERL5OPT")))
1952 const char *popt = s;
1955 if (*s == '-' && *(s+1) == 'T') {
1956 CHECK_MALLOC_TOO_LATE_FOR('T');
1958 PL_taint_warn = FALSE;
1961 char *popt_copy = Nullch;
1974 if (!strchr("CDIMUdmtwA", *s))
1975 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1979 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1980 s = popt_copy + (s - popt);
1981 d = popt_copy + (d - popt);
1988 if( !PL_tainting ) {
1989 PL_taint_warn = TRUE;
1999 #ifdef USE_SITECUSTOMIZE
2002 PL_preambleav = newAV();
2003 av_unshift(PL_preambleav, 1);
2004 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2008 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2009 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2013 scriptname = argv[0];
2016 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2018 else if (scriptname == Nullch) {
2020 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2026 /* Set $^X early so that it can be used for relocatable paths in @INC */
2027 assert (!PL_tainted);
2029 S_set_caret_X(aTHX);
2033 open_script(scriptname,dosearch,sv);
2035 validate_suid(validarg, scriptname);
2038 #if defined(SIGCHLD) || defined(SIGCLD)
2041 # define SIGCHLD SIGCLD
2043 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2044 if (sigstate == (Sighandler_t) SIG_IGN) {
2045 if (ckWARN(WARN_SIGNAL))
2046 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2047 "Can't ignore signal CHLD, forcing to default");
2048 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2054 #ifdef MACOS_TRADITIONAL
2055 if (PL_doextract || gMacPerl_AlwaysExtract) {
2060 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2061 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2065 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2066 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2067 CvUNIQUE_on(PL_compcv);
2069 CvPADLIST(PL_compcv) = pad_new(0);
2070 #ifdef USE_5005THREADS
2071 CvOWNER(PL_compcv) = 0;
2072 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2073 MUTEX_INIT(CvMUTEXP(PL_compcv));
2074 #endif /* USE_5005THREADS */
2077 boot_core_UNIVERSAL();
2078 boot_core_xsutils();
2081 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2083 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2089 # ifdef HAS_SOCKS5_INIT
2090 socks5_init(argv[0]);
2096 init_predump_symbols();
2097 /* init_postdump_symbols not currently designed to be called */
2098 /* more than once (ENV isn't cleared first, for example) */
2099 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2101 init_postdump_symbols(argc,argv,env);
2103 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2104 * or explicitly in some platforms.
2105 * locale.c:Perl_init_i18nl10n() if the environment
2106 * look like the user wants to use UTF-8. */
2107 #if defined(__SYMBIAN32__)
2108 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2111 /* Requires init_predump_symbols(). */
2112 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2117 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2118 * and the default open disciplines. */
2119 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2120 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2122 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2123 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2124 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2126 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2127 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2128 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2130 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2131 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2132 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2133 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2134 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2137 sv_setpvn(sv, ":utf8\0:utf8", 11);
2139 sv_setpvn(sv, ":utf8\0", 6);
2142 sv_setpvn(sv, "\0:utf8", 6);
2148 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2149 if (strEQ(s, "unsafe"))
2150 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2151 else if (strEQ(s, "safe"))
2152 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2154 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2159 /* now parse the script */
2161 SETERRNO(0,SS_NORMAL);
2163 #ifdef MACOS_TRADITIONAL
2164 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2166 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2168 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2169 MacPerl_MPWFileName(PL_origfilename));
2173 if (yyparse() || PL_error_count) {
2175 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2177 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2182 CopLINE_set(PL_curcop, 0);
2183 PL_curstash = PL_defstash;
2184 PL_preprocess = FALSE;
2186 SvREFCNT_dec(PL_e_script);
2187 PL_e_script = Nullsv;
2194 SAVECOPFILE(PL_curcop);
2195 SAVECOPLINE(PL_curcop);
2196 gv_check(PL_defstash);
2203 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2204 dump_mstats("after compilation:");
2213 =for apidoc perl_run
2215 Tells a Perl interpreter to run. See L<perlembed>.
2227 PERL_UNUSED_ARG(my_perl);
2229 oldscope = PL_scopestack_ix;
2237 cxstack_ix = -1; /* start context stack again */
2239 case 0: /* normal completion */
2243 case 2: /* my_exit() */
2244 while (PL_scopestack_ix > oldscope)
2247 PL_curstash = PL_defstash;
2248 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2249 PL_endav && !PL_minus_c)
2250 call_list(oldscope, PL_endav);
2252 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2253 dump_mstats("after execution: ");
2259 POPSTACK_TO(PL_mainstack);
2262 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2274 S_run_body(pTHX_ I32 oldscope)
2276 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2277 PL_sawampersand ? "Enabling" : "Omitting"));
2279 if (!PL_restartop) {
2280 DEBUG_x(dump_all());
2283 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2285 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2289 #ifdef MACOS_TRADITIONAL
2290 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2291 (gMacPerl_ErrorFormat ? "# " : ""),
2292 MacPerl_MPWFileName(PL_origfilename));
2294 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2298 if (PERLDB_SINGLE && PL_DBsingle)
2299 sv_setiv(PL_DBsingle, 1);
2301 call_list(oldscope, PL_initav);
2307 PL_op = PL_restartop;
2311 else if (PL_main_start) {
2312 CvDEPTH(PL_main_cv) = 1;
2313 PL_op = PL_main_start;
2321 =head1 SV Manipulation Functions
2323 =for apidoc p||get_sv
2325 Returns the SV of the specified Perl scalar. If C<create> is set and the
2326 Perl variable does not exist then it will be created. If C<create> is not
2327 set and the variable does not exist then NULL is returned.
2333 Perl_get_sv(pTHX_ const char *name, I32 create)
2336 #ifdef USE_5005THREADS
2337 if (name[1] == '\0' && !isALPHA(name[0])) {
2338 PADOFFSET tmp = find_threadsv(name);
2339 if (tmp != NOT_IN_PAD)
2340 return THREADSV(tmp);
2342 #endif /* USE_5005THREADS */
2343 gv = gv_fetchpv(name, create, SVt_PV);
2350 =head1 Array Manipulation Functions
2352 =for apidoc p||get_av
2354 Returns the AV of the specified Perl array. If C<create> is set and the
2355 Perl variable does not exist then it will be created. If C<create> is not
2356 set and the variable does not exist then NULL is returned.
2362 Perl_get_av(pTHX_ const char *name, I32 create)
2364 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2373 =head1 Hash Manipulation Functions
2375 =for apidoc p||get_hv
2377 Returns the HV of the specified Perl hash. If C<create> is set and the
2378 Perl variable does not exist then it will be created. If C<create> is not
2379 set and the variable does not exist then NULL is returned.
2385 Perl_get_hv(pTHX_ const char *name, I32 create)
2387 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2396 =head1 CV Manipulation Functions
2398 =for apidoc p||get_cv
2400 Returns the CV of the specified Perl subroutine. If C<create> is set and
2401 the Perl subroutine does not exist then it will be declared (which has the
2402 same effect as saying C<sub name;>). If C<create> is not set and the
2403 subroutine does not exist then NULL is returned.
2409 Perl_get_cv(pTHX_ const char *name, I32 create)
2411 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2412 /* XXX unsafe for threads if eval_owner isn't held */
2413 /* XXX this is probably not what they think they're getting.
2414 * It has the same effect as "sub name;", i.e. just a forward
2416 if (create && !GvCVu(gv))
2417 return newSUB(start_subparse(FALSE, 0),
2418 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2426 /* Be sure to refetch the stack pointer after calling these routines. */
2430 =head1 Callback Functions
2432 =for apidoc p||call_argv
2434 Performs a callback to the specified Perl sub. See L<perlcall>.
2440 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2442 /* See G_* flags in cop.h */
2443 /* null terminated arg list */
2450 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2455 return call_pv(sub_name, flags);
2459 =for apidoc p||call_pv
2461 Performs a callback to the specified Perl sub. See L<perlcall>.
2467 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2468 /* name of the subroutine */
2469 /* See G_* flags in cop.h */
2471 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2475 =for apidoc p||call_method
2477 Performs a callback to the specified Perl method. The blessed object must
2478 be on the stack. See L<perlcall>.
2484 Perl_call_method(pTHX_ const char *methname, I32 flags)
2485 /* name of the subroutine */
2486 /* See G_* flags in cop.h */
2488 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2491 /* May be called with any of a CV, a GV, or an SV containing the name. */
2493 =for apidoc p||call_sv
2495 Performs a callback to the Perl sub whose name is in the SV. See
2502 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2503 /* See G_* flags in cop.h */
2506 LOGOP myop; /* fake syntax tree node */
2509 volatile I32 retval = 0;
2511 bool oldcatch = CATCH_GET;
2513 OP* const oldop = PL_op;
2516 if (flags & G_DISCARD) {
2521 Zero(&myop, 1, LOGOP);
2522 myop.op_next = Nullop;
2523 if (!(flags & G_NOARGS))
2524 myop.op_flags |= OPf_STACKED;
2525 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2526 (flags & G_ARRAY) ? OPf_WANT_LIST :
2531 EXTEND(PL_stack_sp, 1);
2532 *++PL_stack_sp = sv;
2534 oldscope = PL_scopestack_ix;
2536 if (PERLDB_SUB && PL_curstash != PL_debstash
2537 /* Handle first BEGIN of -d. */
2538 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2539 /* Try harder, since this may have been a sighandler, thus
2540 * curstash may be meaningless. */
2541 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2542 && !(flags & G_NODEBUG))
2543 PL_op->op_private |= OPpENTERSUB_DB;
2545 if (flags & G_METHOD) {
2546 Zero(&method_op, 1, UNOP);
2547 method_op.op_next = PL_op;
2548 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2549 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2550 PL_op = (OP*)&method_op;
2553 if (!(flags & G_EVAL)) {
2555 call_body((OP*)&myop, FALSE);
2556 retval = PL_stack_sp - (PL_stack_base + oldmark);
2557 CATCH_SET(oldcatch);
2560 myop.op_other = (OP*)&myop;
2562 /* we're trying to emulate pp_entertry() here */
2564 register PERL_CONTEXT *cx;
2565 const I32 gimme = GIMME_V;
2570 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2572 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2574 PL_in_eval = EVAL_INEVAL;
2575 if (flags & G_KEEPERR)
2576 PL_in_eval |= EVAL_KEEPERR;
2578 sv_setpvn(ERRSV,"",0);
2586 call_body((OP*)&myop, FALSE);
2587 retval = PL_stack_sp - (PL_stack_base + oldmark);
2588 if (!(flags & G_KEEPERR))
2589 sv_setpvn(ERRSV,"",0);
2595 /* my_exit() was called */
2596 PL_curstash = PL_defstash;
2599 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2600 Perl_croak(aTHX_ "Callback called exit");
2605 PL_op = PL_restartop;
2609 PL_stack_sp = PL_stack_base + oldmark;
2610 if (flags & G_ARRAY)
2614 *++PL_stack_sp = &PL_sv_undef;
2619 if (PL_scopestack_ix > oldscope) {
2623 register PERL_CONTEXT *cx;
2630 PERL_UNUSED_VAR(newsp);
2631 PERL_UNUSED_VAR(gimme);
2632 PERL_UNUSED_VAR(optype);
2637 if (flags & G_DISCARD) {
2638 PL_stack_sp = PL_stack_base + oldmark;
2648 S_call_body(pTHX_ const OP *myop, bool is_eval)
2650 if (PL_op == myop) {
2652 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2654 PL_op = Perl_pp_entersub(aTHX); /* this does */
2660 /* Eval a string. The G_EVAL flag is always assumed. */
2663 =for apidoc p||eval_sv
2665 Tells Perl to C<eval> the string in the SV.
2671 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2673 /* See G_* flags in cop.h */
2676 UNOP myop; /* fake syntax tree node */
2677 volatile I32 oldmark = SP - PL_stack_base;
2678 volatile I32 retval = 0;
2680 OP* const oldop = PL_op;
2683 if (flags & G_DISCARD) {
2690 Zero(PL_op, 1, UNOP);
2691 EXTEND(PL_stack_sp, 1);
2692 *++PL_stack_sp = sv;
2694 if (!(flags & G_NOARGS))
2695 myop.op_flags = OPf_STACKED;
2696 myop.op_next = Nullop;
2697 myop.op_type = OP_ENTEREVAL;
2698 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2699 (flags & G_ARRAY) ? OPf_WANT_LIST :
2701 if (flags & G_KEEPERR)
2702 myop.op_flags |= OPf_SPECIAL;
2704 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2705 * before a PUSHEVAL, which corrupts the stack after a croak */
2706 TAINT_PROPER("eval_sv()");
2712 call_body((OP*)&myop,TRUE);
2713 retval = PL_stack_sp - (PL_stack_base + oldmark);
2714 if (!(flags & G_KEEPERR))
2715 sv_setpvn(ERRSV,"",0);
2721 /* my_exit() was called */
2722 PL_curstash = PL_defstash;
2725 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2726 Perl_croak(aTHX_ "Callback called exit");
2731 PL_op = PL_restartop;
2735 PL_stack_sp = PL_stack_base + oldmark;
2736 if (flags & G_ARRAY)
2740 *++PL_stack_sp = &PL_sv_undef;
2746 if (flags & G_DISCARD) {
2747 PL_stack_sp = PL_stack_base + oldmark;
2757 =for apidoc p||eval_pv
2759 Tells Perl to C<eval> the given string and return an SV* result.
2765 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2768 SV* sv = newSVpv(p, 0);
2770 eval_sv(sv, G_SCALAR);
2777 if (croak_on_error && SvTRUE(ERRSV)) {
2778 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2784 /* Require a module. */
2787 =head1 Embedding Functions
2789 =for apidoc p||require_pv
2791 Tells Perl to C<require> the file named by the string argument. It is
2792 analogous to the Perl code C<eval "require '$file'">. It's even
2793 implemented that way; consider using load_module instead.
2798 Perl_require_pv(pTHX_ const char *pv)
2802 PUSHSTACKi(PERLSI_REQUIRE);
2804 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2805 eval_sv(sv_2mortal(sv), G_DISCARD);
2811 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2813 register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV);
2816 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2820 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2822 /* This message really ought to be max 23 lines.
2823 * Removed -h because the user already knows that option. Others? */
2825 static const char * const usage_msg[] = {
2826 "-0[octal] specify record separator (\\0, if no argument)",
2827 "-A[mod][=pattern] activate all/given assertions",
2828 "-a autosplit mode with -n or -p (splits $_ into @F)",
2829 "-C[number/list] enables the listed Unicode features",
2830 "-c check syntax only (runs BEGIN and CHECK blocks)",
2831 "-d[:debugger] run program under debugger",
2832 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2833 "-e program one line of program (several -e's allowed, omit programfile)",
2834 "-E program like -e, but enables all optional features",
2835 "-f don't do $sitelib/sitecustomize.pl at startup",
2836 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2837 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2838 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2839 "-l[octal] enable line ending processing, specifies line terminator",
2840 "-[mM][-]module execute \"use/no module...\" before executing program",
2841 "-n assume \"while (<>) { ... }\" loop around program",
2842 "-p assume loop like -n but print line also, like sed",
2843 "-P run program through C preprocessor before compilation",
2844 "-s enable rudimentary parsing for switches after programfile",
2845 "-S look for programfile using PATH environment variable",
2846 "-t enable tainting warnings",
2847 "-T enable tainting checks",
2848 "-u dump core after parsing program",
2849 "-U allow unsafe operations",
2850 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2851 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2852 "-w enable many useful warnings (RECOMMENDED)",
2853 "-W enable all warnings",
2854 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2855 "-X disable all warnings",
2859 const char * const *p = usage_msg;
2861 PerlIO_printf(PerlIO_stdout(),
2862 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2865 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2868 /* convert a string of -D options (or digits) into an int.
2869 * sets *s to point to the char after the options */
2873 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2875 static const char * const usage_msgd[] = {
2876 " Debugging flag values: (see also -d)",
2877 " p Tokenizing and parsing (with v, displays parse stack)",
2878 " s Stack snapshots (with v, displays all stacks)",
2879 " l Context (loop) stack processing",
2880 " t Trace execution",
2881 " o Method and overloading resolution",
2882 " c String/numeric conversions",
2883 " P Print profiling info, preprocessor command for -P, source file input state",
2884 " m Memory allocation",
2885 " f Format processing",
2886 " r Regular expression parsing and execution",
2887 " x Syntax tree dump",
2888 " u Tainting checks",
2889 " H Hash dump -- usurps values()",
2890 " X Scratchpad allocation",
2892 " S Thread synchronization",
2894 " R Include reference counts of dumped variables (eg when using -Ds)",
2895 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2896 " v Verbose: use in conjunction with other flags",
2898 " A Consistency checks on internal structures",
2899 " q quiet - currently only suppresses the 'EXECUTING' message",
2904 /* if adding extra options, remember to update DEBUG_MASK */
2905 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2907 for (; isALNUM(**s); (*s)++) {
2908 const char * const d = strchr(debopts,**s);
2910 i |= 1 << (d - debopts);
2911 else if (ckWARN_d(WARN_DEBUGGING))
2912 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2913 "invalid option -D%c, use -D'' to see choices\n", **s);
2916 else if (isDIGIT(**s)) {
2918 for (; isALNUM(**s); (*s)++) ;
2920 else if (givehelp) {
2921 const char *const *p = usage_msgd;
2922 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2925 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2926 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2927 "-Dp not implemented on this platform\n");
2933 /* This routine handles any switches that can be given during run */
2936 Perl_moreswitches(pTHX_ char *s)
2947 SvREFCNT_dec(PL_rs);
2948 if (s[1] == 'x' && s[2]) {
2949 const char *e = s+=2;
2955 flags = PERL_SCAN_SILENT_ILLDIGIT;
2956 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2957 if (s + numlen < e) {
2958 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2962 PL_rs = newSVpvs("");
2963 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2964 tmps = (U8*)SvPVX(PL_rs);
2965 uvchr_to_utf8(tmps, rschar);
2966 SvCUR_set(PL_rs, UNISKIP(rschar));
2971 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2972 if (rschar & ~((U8)~0))
2973 PL_rs = &PL_sv_undef;
2974 else if (!rschar && numlen >= 2)
2975 PL_rs = newSVpvs("");
2977 char ch = (char)rschar;
2978 PL_rs = newSVpvn(&ch, 1);
2981 sv_setsv(get_sv("/", TRUE), PL_rs);
2986 PL_unicode = parse_unicode_opts( (const char **)&s );
2991 while (*s && !isSPACE(*s)) ++s;
2993 PL_splitstr = savepv(PL_splitstr);
3007 /* -dt indicates to the debugger that threads will be used */
3008 if (*s == 't' && !isALNUM(s[1])) {
3010 my_setenv("PERL5DB_THREADED", "1");
3013 /* The following permits -d:Mod to accepts arguments following an =
3014 in the fashion that -MSome::Mod does. */
3015 if (*s == ':' || *s == '=') {
3017 SV * const sv = newSVpvs("use Devel::");
3019 /* We now allow -d:Module=Foo,Bar */
3020 while(isALNUM(*s) || *s==':') ++s;
3022 sv_catpv(sv, start);
3024 sv_catpvn(sv, start, s-start);
3025 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3028 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3031 PL_perldb = PERLDB_ALL;
3040 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3041 #else /* !DEBUGGING */
3042 if (ckWARN_d(WARN_DEBUGGING))
3043 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3044 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3045 for (s++; isALNUM(*s); s++) ;
3050 usage(PL_origargv[0]);
3053 Safefree(PL_inplace);
3054 #if defined(__CYGWIN__) /* do backup extension automagically */
3055 if (*(s+1) == '\0') {
3056 PL_inplace = savepvn(STR_WITH_LEN(".bak"));
3059 #endif /* __CYGWIN__ */
3060 PL_inplace = savepv(s+1);
3061 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3065 if (*s == '-') /* Additional switches on #! line. */
3069 case 'I': /* -I handled both here and in parse_body() */
3072 while (*s && isSPACE(*s))
3077 /* ignore trailing spaces (possibly followed by other switches) */
3079 for (e = p; *e && !isSPACE(*e); e++) ;
3083 } while (*p && *p != '-');
3084 e = savepvn(s, e-s);
3085 incpush(e, TRUE, TRUE, FALSE, FALSE);
3092 Perl_croak(aTHX_ "No directory specified for -I");
3098 SvREFCNT_dec(PL_ors_sv);
3104 PL_ors_sv = newSVpvs("\n");
3105 numlen = 3 + (*s == '0');
3106 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3110 if (RsPARA(PL_rs)) {
3111 PL_ors_sv = newSVpvs("\n\n");
3114 PL_ors_sv = newSVsv(PL_rs);
3121 PL_preambleav = newAV();
3124 char * const start = s;
3125 SV * const sv = newSVpvs("use assertions::activate");
3126 while(isALNUM(*s) || *s == ':') ++s;
3128 sv_catpvs(sv, "::");
3129 sv_catpvn(sv, start, s-start);
3132 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3135 else if (*s != '\0') {
3136 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3138 av_push(PL_preambleav, sv);
3142 forbid_setid("-M"); /* XXX ? */
3145 forbid_setid("-m"); /* XXX ? */
3149 const char *use = "use ";
3150 /* -M-foo == 'no foo' */
3151 /* Leading space on " no " is deliberate, to make both
3152 possibilities the same length. */
3153 if (*s == '-') { use = " no "; ++s; }
3154 sv = newSVpvn(use,4);
3156 /* We allow -M'Module qw(Foo Bar)' */
3157 while(isALNUM(*s) || *s==':') ++s;
3159 sv_catpv(sv, start);
3160 if (*(start-1) == 'm') {
3162 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3163 sv_catpvs( sv, " ()");
3167 Perl_croak(aTHX_ "Module name required with -%c option",
3169 sv_catpvn(sv, start, s-start);
3170 sv_catpvs(sv, " split(/,/,q");
3171 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3173 sv_catpvs(sv, "\0)");
3177 PL_preambleav = newAV();
3178 av_push(PL_preambleav, sv);
3181 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3193 PL_doswitches = TRUE;
3207 #ifdef MACOS_TRADITIONAL
3208 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3210 PL_do_undump = TRUE;
3218 if (!sv_derived_from(PL_patchlevel, "version"))
3219 upg_version(PL_patchlevel);
3221 PerlIO_printf(PerlIO_stdout(),
3222 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3223 vstringify(PL_patchlevel),
3226 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3227 PerlIO_printf(PerlIO_stdout(),
3228 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3229 vstringify(PL_patchlevel)));
3230 PerlIO_printf(PerlIO_stdout(),
3231 Perl_form(aTHX_ " built under %s at %s %s\n",
3232 OSNAME, __DATE__, __TIME__));
3233 PerlIO_printf(PerlIO_stdout(),
3234 Perl_form(aTHX_ " OS Specific Release: %s\n",
3238 #if defined(LOCAL_PATCH_COUNT)
3239 if (LOCAL_PATCH_COUNT > 0)
3240 PerlIO_printf(PerlIO_stdout(),
3241 "\n(with %d registered patch%s, "
3242 "see perl -V for more detail)",
3243 (int)LOCAL_PATCH_COUNT,
3244 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\n\nCopyright 1987-2006, Larry Wall\n");
3249 #ifdef MACOS_TRADITIONAL
3250 PerlIO_printf(PerlIO_stdout(),
3251 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3252 "maintained by Chris Nandor\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3261 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3266 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "atariST series port, ++jrb bammi@cadence.com\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "MiNT port by Guido Flohr, 1997-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "EPOC port by Olaf Flebbe, 1999-2002\n");
3305 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3306 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3309 #ifdef __SYMBIAN32__
3310 PerlIO_printf(PerlIO_stdout(),
3311 "Symbian port by Nokia, 2004-2005\n");
3313 #ifdef BINARY_BUILD_NOTICE
3314 BINARY_BUILD_NOTICE;
3316 PerlIO_printf(PerlIO_stdout(),
3318 Perl may be copied only under the terms of either the Artistic License or the\n\
3319 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3320 Complete documentation for Perl, including FAQ lists, should be found on\n\
3321 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3322 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3325 if (! (PL_dowarn & G_WARN_ALL_MASK))
3326 PL_dowarn |= G_WARN_ON;
3330 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3331 if (!specialWARN(PL_compiling.cop_warnings))
3332 SvREFCNT_dec(PL_compiling.cop_warnings);
3333 PL_compiling.cop_warnings = pWARN_ALL ;
3337 PL_dowarn = G_WARN_ALL_OFF;
3338 if (!specialWARN(PL_compiling.cop_warnings))
3339 SvREFCNT_dec(PL_compiling.cop_warnings);
3340 PL_compiling.cop_warnings = pWARN_NONE ;
3345 if (s[1] == '-') /* Additional switches on #! line. */
3350 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3356 #ifdef ALTERNATE_SHEBANG
3357 case 'S': /* OS/2 needs -S on "extproc" line. */
3365 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3370 /* compliments of Tom Christiansen */
3372 /* unexec() can be found in the Gnu emacs distribution */
3373 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3376 Perl_my_unexec(pTHX)
3384 prog = newSVpv(BIN_EXP, 0);
3385 sv_catpvs(prog, "/perl");
3386 file = newSVpv(PL_origfilename, 0);
3387 sv_catpvs(file, ".perldump");
3389 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3390 /* unexec prints msg to stderr in case of failure */
3391 PerlProc_exit(status);
3394 # include <lib$routines.h>
3395 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3397 ABORT(); /* for use with undump */
3402 /* initialize curinterp */
3408 # define PERLVAR(var,type)
3409 # define PERLVARA(var,n,type)
3410 # if defined(PERL_IMPLICIT_CONTEXT)
3411 # if defined(USE_5005THREADS)
3412 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3413 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3414 # else /* !USE_5005THREADS */
3415 # define PERLVARI(var,type,init) aTHX->var = init;
3416 # define PERLVARIC(var,type,init) aTHX->var = init;
3417 # endif /* USE_5005THREADS */
3419 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3420 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3422 # include "intrpvar.h"
3423 # ifndef USE_5005THREADS
3424 # include "thrdvar.h"
3431 # define PERLVAR(var,type)
3432 # define PERLVARA(var,n,type)
3433 # define PERLVARI(var,type,init) PL_##var = init;
3434 # define PERLVARIC(var,type,init) PL_##var = init;
3435 # include "intrpvar.h"
3436 # ifndef USE_5005THREADS
3437 # include "thrdvar.h"
3448 S_init_main_stash(pTHX)
3452 PL_curstash = PL_defstash = newHV();
3453 /* We know that the string "main" will be in the global shared string
3454 table, so it's a small saving to use it rather than allocate another
3456 PL_curstname = newSVpvn_share("main", 4, 0);
3457 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3458 /* If we hadn't caused another reference to "main" to be in the shared
3459 string table above, then it would be worth reordering these two,
3460 because otherwise all we do is delete "main" from it as a consequence
3461 of the SvREFCNT_dec, only to add it again with hv_name_set */
3462 SvREFCNT_dec(GvHV(gv));
3463 hv_name_set(PL_defstash, "main", 4, 0);
3464 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3466 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3467 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3468 GvMULTI_on(PL_incgv);
3469 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3470 GvMULTI_on(PL_hintgv);
3471 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3472 SvREFCNT_inc(PL_defgv);
3473 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3474 SvREFCNT_inc(PL_errgv);
3475 GvMULTI_on(PL_errgv);
3476 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3477 GvMULTI_on(PL_replgv);
3478 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3479 #ifdef PERL_DONT_CREATE_GVSV
3482 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3483 sv_setpvn(ERRSV, "", 0);
3484 PL_curstash = PL_defstash;
3485 CopSTASH_set(&PL_compiling, PL_defstash);
3486 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3487 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3488 /* We must init $/ before switches are processed. */
3489 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3492 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3494 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3499 const char *cpp_discard_flag;
3508 PL_origfilename = savepvn(STR_WITH_LEN("-e"));
3511 /* if find_script() returns, it returns a malloc()-ed value */
3512 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3514 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3515 const char *s = scriptname + 8;
3516 PL_fdscript = atoi(s);
3521 * Tell apart "normal" usage of fdscript, e.g.
3522 * with bash on FreeBSD:
3523 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3524 * from usage in suidperl.
3525 * Does any "normal" usage leave garbage after the number???
3526 * Is it a mistake to use a similar /dev/fd/ construct for
3531 * Be supersafe and do some sanity-checks.
3532 * Still, can we be sure we got the right thing?
3535 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3538 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3540 scriptname = savepv(s + 1);
3541 Safefree(PL_origfilename);
3542 PL_origfilename = (char *)scriptname;
3547 CopFILE_free(PL_curcop);
3548 CopFILE_set(PL_curcop, PL_origfilename);
3549 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3550 scriptname = (char *)"";
3551 if (PL_fdscript >= 0) {
3552 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3553 # if defined(HAS_FCNTL) && defined(F_SETFD)
3555 /* ensure close-on-exec */
3556 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3561 Perl_croak(aTHX_ "sperl needs fd script\n"
3562 "You should not call sperl directly; do you need to "
3563 "change a #! line\nfrom sperl to perl?\n");
3566 * Do not open (or do other fancy stuff) while setuid.
3567 * Perl does the open, and hands script to suidperl on a fd;
3568 * suidperl only does some checks, sets up UIDs and re-execs
3569 * perl with that fd as it has always done.
3572 if (PL_suidscript != 1) {
3573 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3576 else if (PL_preprocess) {
3577 const char * const cpp_cfg = CPPSTDIN;
3578 SV * const cpp = newSVpvs("");
3579 SV * const cmd = NEWSV(0,0);
3581 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3582 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3583 if (strEQ(cpp_cfg, "cppstdin"))
3584 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3585 sv_catpv(cpp, cpp_cfg);
3588 sv_catpvs(sv, "-I");
3589 sv_catpv(sv,PRIVLIB_EXP);
3592 DEBUG_P(PerlIO_printf(Perl_debug_log,
3593 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3594 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3597 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3604 cpp_discard_flag = "";
3606 cpp_discard_flag = "-C";
3610 perl = os2_execname(aTHX);
3612 perl = PL_origargv[0];
3616 /* This strips off Perl comments which might interfere with
3617 the C pre-processor, including #!. #line directives are
3618 deliberately stripped to avoid confusion with Perl's version
3619 of #line. FWP played some golf with it so it will fit
3620 into VMS's 255 character buffer.
3623 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3625 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3627 Perl_sv_setpvf(aTHX_ cmd, "\
3628 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3629 perl, quote, code, quote, scriptname, cpp,
3630 cpp_discard_flag, sv, CPPMINUS);
3632 PL_doextract = FALSE;
3634 DEBUG_P(PerlIO_printf(Perl_debug_log,
3635 "PL_preprocess: cmd=\"%s\"\n",
3638 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3642 else if (!*scriptname) {
3643 forbid_setid("program input from stdin");
3644 PL_rsfp = PerlIO_stdin();
3647 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3648 # if defined(HAS_FCNTL) && defined(F_SETFD)
3650 /* ensure close-on-exec */
3651 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3654 #endif /* IAMSUID */
3656 /* PSz 16 Sep 03 Keep neat error message */
3658 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3660 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3661 CopFILE(PL_curcop), Strerror(errno));
3666 * I_SYSSTATVFS HAS_FSTATVFS
3668 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3669 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3670 * here so that metaconfig picks them up. */
3674 S_fd_on_nosuid_fs(pTHX_ int fd)
3677 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3678 * but is needed also on machines without setreuid.
3679 * Seems safe enough to run as root.
3681 int check_okay = 0; /* able to do all the required sys/libcalls */
3682 int on_nosuid = 0; /* the fd is on a nosuid fs */
3684 * Need to check noexec also: nosuid might not be set, the average
3685 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3687 int on_noexec = 0; /* the fd is on a noexec fs */
3690 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3691 * fstatvfs() is UNIX98.
3692 * fstatfs() is 4.3 BSD.
3693 * ustat()+getmnt() is pre-4.3 BSD.
3694 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3695 * an irrelevant filesystem while trying to reach the right one.
3698 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3700 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3701 defined(HAS_FSTATVFS)
3702 # define FD_ON_NOSUID_CHECK_OKAY
3703 struct statvfs stfs;
3705 check_okay = fstatvfs(fd, &stfs) == 0;
3706 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3708 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3709 on platforms where it is present. */
3710 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3712 # endif /* fstatvfs */
3714 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3715 defined(PERL_MOUNT_NOSUID) && \
3716 defined(PERL_MOUNT_NOEXEC) && \
3717 defined(HAS_FSTATFS) && \
3718 defined(HAS_STRUCT_STATFS) && \
3719 defined(HAS_STRUCT_STATFS_F_FLAGS)
3720 # define FD_ON_NOSUID_CHECK_OKAY
3723 check_okay = fstatfs(fd, &stfs) == 0;
3724 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3725 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3726 # endif /* fstatfs */
3728 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3729 defined(PERL_MOUNT_NOSUID) && \
3730 defined(PERL_MOUNT_NOEXEC) && \
3731 defined(HAS_FSTAT) && \
3732 defined(HAS_USTAT) && \
3733 defined(HAS_GETMNT) && \
3734 defined(HAS_STRUCT_FS_DATA) && \
3736 # define FD_ON_NOSUID_CHECK_OKAY
3739 if (fstat(fd, &fdst) == 0) {
3741 if (ustat(fdst.st_dev, &us) == 0) {
3743 /* NOSTAT_ONE here because we're not examining fields which
3744 * vary between that case and STAT_ONE. */
3745 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3746 size_t cmplen = sizeof(us.f_fname);
3747 if (sizeof(fsd.fd_req.path) < cmplen)
3748 cmplen = sizeof(fsd.fd_req.path);
3749 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3750 fdst.st_dev == fsd.fd_req.dev) {
3752 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3753 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3758 # endif /* fstat+ustat+getmnt */
3760 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3761 defined(HAS_GETMNTENT) && \
3762 defined(HAS_HASMNTOPT) && \
3763 defined(MNTOPT_NOSUID) && \
3764 defined(MNTOPT_NOEXEC)
3765 # define FD_ON_NOSUID_CHECK_OKAY
3766 FILE *mtab = fopen("/etc/mtab", "r");
3767 struct mntent *entry;
3770 if (mtab && (fstat(fd, &stb) == 0)) {
3771 while (entry = getmntent(mtab)) {
3772 if (stat(entry->mnt_dir, &fsb) == 0
3773 && fsb.st_dev == stb.st_dev)
3775 /* found the filesystem */
3777 if (hasmntopt(entry, MNTOPT_NOSUID))
3779 if (hasmntopt(entry, MNTOPT_NOEXEC))
3782 } /* A single fs may well fail its stat(). */
3787 # endif /* getmntent+hasmntopt */
3790 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3792 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3794 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3795 return ((!check_okay) || on_nosuid || on_noexec);
3797 #endif /* IAMSUID */
3800 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3805 #endif /* IAMSUID */
3807 /* do we need to emulate setuid on scripts? */
3809 /* This code is for those BSD systems that have setuid #! scripts disabled
3810 * in the kernel because of a security problem. Merely defining DOSUID
3811 * in perl will not fix that problem, but if you have disabled setuid
3812 * scripts in the kernel, this will attempt to emulate setuid and setgid
3813 * on scripts that have those now-otherwise-useless bits set. The setuid
3814 * root version must be called suidperl or sperlN.NNN. If regular perl
3815 * discovers that it has opened a setuid script, it calls suidperl with
3816 * the same argv that it had. If suidperl finds that the script it has
3817 * just opened is NOT setuid root, it sets the effective uid back to the
3818 * uid. We don't just make perl setuid root because that loses the
3819 * effective uid we had before invoking perl, if it was different from the
3822 * Description/comments above do not match current workings:
3823 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3824 * suidperl called with script open and name changed to /dev/fd/N/X;
3825 * suidperl croaks if script is not setuid;
3826 * making perl setuid would be a huge security risk (and yes, that
3827 * would lose any euid we might have had).
3829 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3830 * be defined in suidperl only. suidperl must be setuid root. The
3831 * Configure script will set this up for you if you want it.
3837 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3838 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3839 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3841 const char *linestr;
3845 if (PL_fdscript < 0 || PL_suidscript != 1)
3846 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3848 * Since the script is opened by perl, not suidperl, some of these
3849 * checks are superfluous. Leaving them in probably does not lower
3853 * Do checks even for systems with no HAS_SETREUID.
3854 * We used to swap, then re-swap UIDs with
3856 if (setreuid(PL_euid,PL_uid) < 0
3857 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3858 Perl_croak(aTHX_ "Can't swap uid and euid");
3861 if (setreuid(PL_uid,PL_euid) < 0
3862 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3863 Perl_croak(aTHX_ "Can't reswap uid and euid");
3867 /* On this access check to make sure the directories are readable,
3868 * there is actually a small window that the user could use to make
3869 * filename point to an accessible directory. So there is a faint
3870 * chance that someone could execute a setuid script down in a
3871 * non-accessible directory. I don't know what to do about that.
3872 * But I don't think it's too important. The manual lies when
3873 * it says access() is useful in setuid programs.
3875 * So, access() is pretty useless... but not harmful... do anyway.
3877 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3878 Perl_croak(aTHX_ "Can't access() script\n");
3881 /* If we can swap euid and uid, then we can determine access rights
3882 * with a simple stat of the file, and then compare device and
3883 * inode to make sure we did stat() on the same file we opened.
3884 * Then we just have to make sure he or she can execute it.
3887 * As the script is opened by perl, not suidperl, we do not need to
3888 * care much about access rights.
3890 * The 'script changed' check is needed, or we can get lied to
3891 * about $0 with e.g.
3892 * suidperl /dev/fd/4//bin/x 4<setuidscript
3893 * Without HAS_SETREUID, is it safe to stat() as root?
3895 * Are there any operating systems that pass /dev/fd/xxx for setuid
3896 * scripts, as suggested/described in perlsec(1)? Surely they do not
3897 * pass the script name as we do, so the "script changed" test would
3898 * fail for them... but we never get here with
3899 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3901 * This is one place where we must "lie" about return status: not
3902 * say if the stat() failed. We are doing this as root, and could
3903 * be tricked into reporting existence or not of files that the
3904 * "plain" user cannot even see.
3908 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3909 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3910 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3911 Perl_croak(aTHX_ "Setuid script changed\n");
3915 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3916 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3919 * We used to do this check as the "plain" user (after swapping
3920 * UIDs). But the check for nosuid and noexec filesystem is needed,
3921 * and should be done even without HAS_SETREUID. (Maybe those
3922 * operating systems do not have such mount options anyway...)
3923 * Seems safe enough to do as root.
3925 #if !defined(NO_NOSUID_CHECK)
3926 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3927 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3930 #endif /* IAMSUID */
3932 if (!S_ISREG(PL_statbuf.st_mode)) {
3933 Perl_croak(aTHX_ "Setuid script not plain file\n");
3935 if (PL_statbuf.st_mode & S_IWOTH)
3936 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3937 PL_doswitches = FALSE; /* -s is insecure in suid */
3938 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3939 CopLINE_inc(PL_curcop);
3940 linestr = SvPV_nolen_const(PL_linestr);
3941 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3942 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3943 Perl_croak(aTHX_ "No #! line");
3947 /* Sanity check on line length */
3948 s_end = s + strlen(s);
3949 if (s_end == s || (s_end - s) > 4000)
3950 Perl_croak(aTHX_ "Very long #! line");
3951 /* Allow more than a single space after #! */
3952 while (isSPACE(*s)) s++;
3953 /* Sanity check on buffer end */
3954 while ((*s) && !isSPACE(*s)) s++;
3955 for (s2 = s; (s2 > linestr &&
3956 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3957 || s2[-1] == '-')); s2--) ;
3958 /* Sanity check on buffer start */
3959 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3960 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3961 Perl_croak(aTHX_ "Not a perl script");
3962 while (*s == ' ' || *s == '\t') s++;
3964 * #! arg must be what we saw above. They can invoke it by
3965 * mentioning suidperl explicitly, but they may not add any strange
3966 * arguments beyond what #! says if they do invoke suidperl that way.
3969 * The way validarg was set up, we rely on the kernel to start
3970 * scripts with argv[1] set to contain all #! line switches (the
3974 * Check that we got all the arguments listed in the #! line (not
3975 * just that there are no extraneous arguments). Might not matter
3976 * much, as switches from #! line seem to be acted upon (also), and
3977 * so may be checked and trapped in perl. But, security checks must
3978 * be done in suidperl and not deferred to perl. Note that suidperl
3979 * does not get around to parsing (and checking) the switches on
3980 * the #! line (but execs perl sooner).
3981 * Allow (require) a trailing newline (which may be of two
3982 * characters on some architectures?) (but no other trailing
3985 len = strlen(validarg);
3986 if (strEQ(validarg," PHOOEY ") ||
3987 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3988 !((s_end - s) == len+1
3989 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3990 Perl_croak(aTHX_ "Args must match #! line");
3993 if (PL_fdscript < 0 &&
3994 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3995 PL_euid == PL_statbuf.st_uid)
3997 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3998 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3999 #endif /* IAMSUID */
4001 if (PL_fdscript < 0 &&
4002 PL_euid) { /* oops, we're not the setuid root perl */
4004 * When root runs a setuid script, we do not go through the same
4005 * steps of execing sperl and then perl with fd scripts, but
4006 * simply set up UIDs within the same perl invocation; so do
4007 * not have the same checks (on options, whatever) that we have
4008 * for plain users. No problem really: would have to be a script
4009 * that does not actually work for plain users; and if root is
4010 * foolish and can be persuaded to run such an unsafe script, he
4011 * might run also non-setuid ones, and deserves what he gets.
4013 * Or, we might drop the PL_euid check above (and rely just on
4014 * PL_fdscript to avoid loops), and do the execs
4020 * Pass fd script to suidperl.
4021 * Exec suidperl, substituting fd script for scriptname.
4022 * Pass script name as "subdir" of fd, which perl will grok;
4023 * in fact will use that to distinguish this from "normal"
4024 * usage, see comments above.
4026 PerlIO_rewind(PL_rsfp);
4027 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4028 /* PSz 27 Feb 04 Sanity checks on scriptname */
4029 if ((!scriptname) || (!*scriptname) ) {
4030 Perl_croak(aTHX_ "No setuid script name\n");
4032 if (*scriptname == '-') {
4033 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4034 /* Or we might confuse it with an option when replacing
4035 * name in argument list, below (though we do pointer, not
4036 * string, comparisons).
4039 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4040 if (!PL_origargv[which]) {
4041 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4043 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4044 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4045 #if defined(HAS_FCNTL) && defined(F_SETFD)
4046 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4049 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4050 (int)PERL_REVISION, (int)PERL_VERSION,
4051 (int)PERL_SUBVERSION), PL_origargv);
4053 #endif /* IAMSUID */
4054 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4057 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4059 * This seems back to front: we try HAS_SETEGID first; if not available
4060 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4061 * in the sense that we only want to set EGID; but are there any machines
4062 * with either of the latter, but not the former? Same with UID, later.
4065 (void)setegid(PL_statbuf.st_gid);
4068 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4070 #ifdef HAS_SETRESGID
4071 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4073 PerlProc_setgid(PL_statbuf.st_gid);
4077 if (PerlProc_getegid() != PL_statbuf.st_gid)
4078 Perl_croak(aTHX_ "Can't do setegid!\n");
4080 if (PL_statbuf.st_mode & S_ISUID) {
4081 if (PL_statbuf.st_uid != PL_euid)
4083 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4086 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4088 #ifdef HAS_SETRESUID
4089 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4091 PerlProc_setuid(PL_statbuf.st_uid);
4095 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4096 Perl_croak(aTHX_ "Can't do seteuid!\n");
4098 else if (PL_uid) { /* oops, mustn't run as root */
4100 (void)seteuid((Uid_t)PL_uid);
4103 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4105 #ifdef HAS_SETRESUID
4106 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4108 PerlProc_setuid((Uid_t)PL_uid);
4112 if (PerlProc_geteuid() != PL_uid)
4113 Perl_croak(aTHX_ "Can't do seteuid!\n");
4116 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4117 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4120 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4121 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4122 else if (PL_fdscript < 0 || PL_suidscript != 1)
4123 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4124 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4126 /* PSz 16 Sep 03 Keep neat error message */
4127 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4130 /* We absolutely must clear out any saved ids here, so we */
4131 /* exec the real perl, substituting fd script for scriptname. */
4132 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4134 * It might be thought that using setresgid and/or setresuid (changed to
4135 * set the saved IDs) above might obviate the need to exec, and we could
4136 * go on to "do the perl thing".
4138 * Is there such a thing as "saved GID", and is that set for setuid (but
4139 * not setgid) execution like suidperl? Without exec, it would not be
4140 * cleared for setuid (but not setgid) scripts (or might need a dummy
4143 * We need suidperl to do the exact same argument checking that perl
4144 * does. Thus it cannot be very small; while it could be significantly
4145 * smaller, it is safer (simpler?) to make it essentially the same
4146 * binary as perl (but they are not identical). - Maybe could defer that
4147 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4148 * but prefer to do thorough checks in suidperl itself. Such deferral
4149 * would make suidperl security rely on perl, a design no-no.
4151 * Setuid things should be short and simple, thus easy to understand and
4152 * verify. They should do their "own thing", without influence by
4153 * attackers. It may help if their internal execution flow is fixed,
4154 * regardless of platform: it may be best to exec anyway.
4156 * Suidperl should at least be conceptually simple: a wrapper only,
4157 * never to do any real perl. Maybe we should put
4159 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4161 * into the perly bits.
4163 PerlIO_rewind(PL_rsfp);
4164 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4166 * Keep original arguments: suidperl already has fd script.
4168 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4169 /* if (!PL_origargv[which]) { */
4170 /* errno = EPERM; */
4171 /* Perl_croak(aTHX_ "Permission denied\n"); */
4173 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4174 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4175 #if defined(HAS_FCNTL) && defined(F_SETFD)
4176 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4179 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4180 (int)PERL_REVISION, (int)PERL_VERSION,
4181 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4183 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4184 #endif /* IAMSUID */
4186 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4187 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4188 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4189 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4191 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4194 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4195 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4196 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4197 /* not set-id, must be wrapped */
4205 S_find_beginning(pTHX)
4208 register const char *s2;
4209 #ifdef MACOS_TRADITIONAL
4213 /* skip forward in input to the real script? */
4216 #ifdef MACOS_TRADITIONAL
4217 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4219 while (PL_doextract || gMacPerl_AlwaysExtract) {
4220 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4221 if (!gMacPerl_AlwaysExtract)
4222 Perl_croak(aTHX_ "No Perl script found in input\n");
4224 if (PL_doextract) /* require explicit override ? */
4225 if (!OverrideExtract(PL_origfilename))
4226 Perl_croak(aTHX_ "User aborted script\n");
4228 PL_doextract = FALSE;
4230 /* Pater peccavi, file does not have #! */
4231 PerlIO_rewind(PL_rsfp);
4236 while (PL_doextract) {
4237 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4238 Perl_croak(aTHX_ "No Perl script found in input\n");
4241 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4242 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4243 PL_doextract = FALSE;
4244 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4246 while (*s == ' ' || *s == '\t') s++;
4248 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4249 || s2[-1] == '_') s2--;
4250 if (strnEQ(s2-4,"perl",4))
4251 while ((s = moreswitches(s)))
4254 #ifdef MACOS_TRADITIONAL
4255 /* We are always searching for the #!perl line in MacPerl,
4256 * so if we find it, still keep the line count correct
4257 * by counting lines we already skipped over
4259 for (; maclines > 0 ; maclines--)
4260 PerlIO_ungetc(PL_rsfp, '\n');
4264 /* gMacPerl_AlwaysExtract is false in MPW tool */
4265 } else if (gMacPerl_AlwaysExtract) {
4276 PL_uid = PerlProc_getuid();
4277 PL_euid = PerlProc_geteuid();
4278 PL_gid = PerlProc_getgid();
4279 PL_egid = PerlProc_getegid();
4281 PL_uid |= PL_gid << 16;
4282 PL_euid |= PL_egid << 16;
4284 /* Should not happen: */
4285 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4286 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4289 * Should go by suidscript, not uid!=euid: why disallow
4290 * system("ls") in scripts run from setuid things?
4291 * Or, is this run before we check arguments and set suidscript?
4292 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4293 * (We never have suidscript, can we be sure to have fdscript?)
4294 * Or must then go by UID checks? See comments in forbid_setid also.
4298 /* This is used very early in the lifetime of the program,
4299 * before even the options are parsed, so PL_tainting has
4300 * not been initialized properly. */
4302 Perl_doing_taint(int argc, char *argv[], char *envp[])
4304 #ifndef PERL_IMPLICIT_SYS
4305 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4306 * before we have an interpreter-- and the whole point of this
4307 * function is to be called at such an early stage. If you are on
4308 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4309 * "tainted because running with altered effective ids', you'll
4310 * have to add your own checks somewhere in here. The two most
4311 * known samples of 'implicitness' are Win32 and NetWare, neither
4312 * of which has much of concept of 'uids'. */
4313 int uid = PerlProc_getuid();
4314 int euid = PerlProc_geteuid();
4315 int gid = PerlProc_getgid();
4316 int egid = PerlProc_getegid();
4323 if (uid && (euid != uid || egid != gid))
4325 #endif /* !PERL_IMPLICIT_SYS */
4326 /* This is a really primitive check; environment gets ignored only
4327 * if -T are the first chars together; otherwise one gets
4328 * "Too late" message. */
4329 if ( argc > 1 && argv[1][0] == '-'
4330 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4336 S_forbid_setid(pTHX_ const char *s)
4338 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4339 if (PL_euid != PL_uid)
4340 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4341 if (PL_egid != PL_gid)
4342 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4343 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4345 * Checks for UID/GID above "wrong": why disallow
4346 * perl -e 'print "Hello\n"'
4347 * from within setuid things?? Simply drop them: replaced by
4348 * fdscript/suidscript and #ifdef IAMSUID checks below.
4350 * This may be too late for command-line switches. Will catch those on
4351 * the #! line, after finding the script name and setting up
4352 * fdscript/suidscript. Note that suidperl does not get around to
4353 * parsing (and checking) the switches on the #! line, but checks that
4354 * the two sets are identical.
4356 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4357 * instead, or would that be "too late"? (We never have suidscript, can
4358 * we be sure to have fdscript?)
4360 * Catch things with suidscript (in descendant of suidperl), even with
4361 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4362 * below; but I am paranoid.
4364 * Also see comments about root running a setuid script, elsewhere.
4366 if (PL_suidscript >= 0)
4367 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4369 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4370 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4371 #endif /* IAMSUID */
4375 Perl_init_debugger(pTHX)
4377 HV * const ostash = PL_curstash;
4379 PL_curstash = PL_debstash;
4380 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4381 AvREAL_off(PL_dbargs);
4382 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4383 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4384 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4385 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4386 sv_setiv(PL_DBsingle, 0);
4387 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4388 sv_setiv(PL_DBtrace, 0);
4389 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4390 sv_setiv(PL_DBsignal, 0);
4391 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4392 sv_setiv(PL_DBassertion, 0);
4393 PL_curstash = ostash;
4396 #ifndef STRESS_REALLOC
4397 #define REASONABLE(size) (size)
4399 #define REASONABLE(size) (1) /* unreasonable */
4403 Perl_init_stacks(pTHX)
4405 /* start with 128-item stack and 8K cxstack */
4406 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4407 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4408 PL_curstackinfo->si_type = PERLSI_MAIN;
4409 PL_curstack = PL_curstackinfo->si_stack;
4410 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4412 PL_stack_base = AvARRAY(PL_curstack);
4413 PL_stack_sp = PL_stack_base;
4414 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4416 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4419 PL_tmps_max = REASONABLE(128);
4421 Newx(PL_markstack,REASONABLE(32),I32);
4422 PL_markstack_ptr = PL_markstack;
4423 PL_markstack_max = PL_markstack + REASONABLE(32);
4427 Newx(PL_scopestack,REASONABLE(32),I32);
4428 PL_scopestack_ix = 0;
4429 PL_scopestack_max = REASONABLE(32);
4431 Newx(PL_savestack,REASONABLE(128),ANY);
4432 PL_savestack_ix = 0;
4433 PL_savestack_max = REASONABLE(128);
4441 while (PL_curstackinfo->si_next)
4442 PL_curstackinfo = PL_curstackinfo->si_next;
4443 while (PL_curstackinfo) {
4444 PERL_SI *p = PL_curstackinfo->si_prev;
4445 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4446 Safefree(PL_curstackinfo->si_cxstack);
4447 Safefree(PL_curstackinfo);
4448 PL_curstackinfo = p;
4450 Safefree(PL_tmps_stack);
4451 Safefree(PL_markstack);
4452 Safefree(PL_scopestack);
4453 Safefree(PL_savestack);
4462 lex_start(PL_linestr);
4464 PL_subname = newSVpvs("main");
4468 S_init_predump_symbols(pTHX)
4473 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4474 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4475 GvMULTI_on(PL_stdingv);
4476 io = GvIOp(PL_stdingv);
4477 IoTYPE(io) = IoTYPE_RDONLY;
4478 IoIFP(io) = PerlIO_stdin();
4479 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4481 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4483 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4486 IoTYPE(io) = IoTYPE_WRONLY;
4487 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4489 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4491 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4493 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4494 GvMULTI_on(PL_stderrgv);
4495 io = GvIOp(PL_stderrgv);
4496 IoTYPE(io) = IoTYPE_WRONLY;
4497 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4498 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4500 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4502 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4504 Safefree(PL_osname);
4505 PL_osname = savepv(OSNAME);
4509 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4511 argc--,argv++; /* skip name of script */
4512 if (PL_doswitches) {
4513 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4517 if (argv[0][1] == '-' && !argv[0][2]) {
4521 if ((s = strchr(argv[0], '='))) {
4523 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4526 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4529 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4530 GvMULTI_on(PL_argvgv);
4531 (void)gv_AVadd(PL_argvgv);
4532 av_clear(GvAVn(PL_argvgv));
4533 for (; argc > 0; argc--,argv++) {
4534 SV * const sv = newSVpv(argv[0],0);
4535 av_push(GvAVn(PL_argvgv),sv);
4536 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4537 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4540 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4541 (void)sv_utf8_decode(sv);
4547 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4552 PL_toptarget = NEWSV(0,0);
4553 sv_upgrade(PL_toptarget, SVt_PVFM);
4554 sv_setpvn(PL_toptarget, "", 0);
4555 PL_bodytarget = NEWSV(0,0);
4556 sv_upgrade(PL_bodytarget, SVt_PVFM);
4557 sv_setpvn(PL_bodytarget, "", 0);
4558 PL_formtarget = PL_bodytarget;
4562 init_argv_symbols(argc,argv);
4564 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4565 #ifdef MACOS_TRADITIONAL
4566 /* $0 is not majick on a Mac */
4567 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4569 sv_setpv(GvSV(tmpgv),PL_origfilename);
4570 magicname("0", "0", 1);
4573 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4575 GvMULTI_on(PL_envgv);
4576 hv = GvHVn(PL_envgv);
4577 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4579 #ifdef USE_ENVIRON_ARRAY
4580 /* Note that if the supplied env parameter is actually a copy
4581 of the global environ then it may now point to free'd memory
4582 if the environment has been modified since. To avoid this
4583 problem we treat env==NULL as meaning 'use the default'
4588 # ifdef USE_ITHREADS
4589 && PL_curinterp == aTHX
4593 environ[0] = Nullch;
4596 char** origenv = environ;
4599 for (; *env; env++) {
4600 if (!(s = strchr(*env,'=')) || s == *env)
4602 #if defined(MSDOS) && !defined(DJGPP)
4607 sv = newSVpv(s+1, 0);
4608 (void)hv_store(hv, *env, s - *env, sv, 0);
4611 if (origenv != environ) {
4612 /* realloc has shifted us */
4613 env = (env - origenv) + environ;
4618 #endif /* USE_ENVIRON_ARRAY */
4619 #endif /* !PERL_MICRO */
4622 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4623 SvREADONLY_off(GvSV(tmpgv));
4624 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4625 SvREADONLY_on(GvSV(tmpgv));
4627 #ifdef THREADS_HAVE_PIDS
4628 PL_ppid = (IV)getppid();
4631 /* touch @F array to prevent spurious warnings 20020415 MJD */
4633 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4635 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4636 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4637 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4641 S_init_perllib(pTHX)
4646 s = PerlEnv_getenv("PERL5LIB");
4648 * It isn't possible to delete an environment variable with
4649 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4650 * case we treat PERL5LIB as undefined if it has a zero-length value.
4652 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4653 if (s && *s != '\0')
4657 incpush(s, TRUE, TRUE, TRUE, FALSE);
4659 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4661 /* Treat PERL5?LIB as a possible search list logical name -- the
4662 * "natural" VMS idiom for a Unix path string. We allow each
4663 * element to be a set of |-separated directories for compatibility.
4667 if (my_trnlnm("PERL5LIB",buf,0))
4668 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4670 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4674 /* Use the ~-expanded versions of APPLLIB (undocumented),
4675 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4678 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4682 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4684 #ifdef MACOS_TRADITIONAL
4687 SV * privdir = NEWSV(55, 0);
4688 char * macperl = PerlEnv_getenv("MACPERL");
4693 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4694 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4695 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4696 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4697 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4698 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4700 SvREFCNT_dec(privdir);
4703 incpush(":", FALSE, FALSE, TRUE, FALSE);
4706 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4709 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4711 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4715 /* sitearch is always relative to sitelib on Windows for
4716 * DLL-based path intuition to work correctly */
4717 # if !defined(WIN32)
4718 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4724 /* this picks up sitearch as well */
4725 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4727 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4731 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4732 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4735 #ifdef PERL_VENDORARCH_EXP
4736 /* vendorarch is always relative to vendorlib on Windows for
4737 * DLL-based path intuition to work correctly */
4738 # if !defined(WIN32)
4739 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4743 #ifdef PERL_VENDORLIB_EXP
4745 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4747 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4751 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4752 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4755 #ifdef PERL_OTHERLIBDIRS
4756 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4760 incpush(".", FALSE, FALSE, TRUE, FALSE);
4761 #endif /* MACOS_TRADITIONAL */
4764 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4765 # define PERLLIB_SEP ';'
4768 # define PERLLIB_SEP '|'
4770 # if defined(MACOS_TRADITIONAL)
4771 # define PERLLIB_SEP ','
4773 # define PERLLIB_SEP ':'
4777 #ifndef PERLLIB_MANGLE
4778 # define PERLLIB_MANGLE(s,n) (s)
4781 /* Push a directory onto @INC if it exists.
4782 Generate a new SV if we do this, to save needing to copy the SV we push
4785 S_incpush_if_exists(pTHX_ SV *dir)
4788 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4789 S_ISDIR(tmpstatbuf.st_mode)) {
4790 av_push(GvAVn(PL_incgv), dir);
4797 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4800 SV *subdir = Nullsv;
4801 const char *p = dir;
4806 if (addsubdirs || addoldvers) {
4807 subdir = NEWSV(0,0);
4810 /* Break at all separators */
4812 SV *libdir = NEWSV(55,0);
4815 /* skip any consecutive separators */
4817 while ( *p == PERLLIB_SEP ) {
4818 /* Uncomment the next line for PATH semantics */
4819 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4824 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4825 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4830 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4831 p = Nullch; /* break out */
4833 #ifdef MACOS_TRADITIONAL
4834 if (!strchr(SvPVX(libdir), ':')) {
4837 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4839 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4840 sv_catpvs(libdir, ":");
4843 /* Do the if() outside the #ifdef to avoid warnings about an unused
4846 #ifdef PERL_RELOCATABLE_INC
4848 * Relocatable include entries are marked with a leading .../
4851 * 0: Remove that leading ".../"
4852 * 1: Remove trailing executable name (anything after the last '/')
4853 * from the perl path to give a perl prefix
4855 * While the @INC element starts "../" and the prefix ends with a real
4856 * directory (ie not . or ..) chop that real directory off the prefix
4857 * and the leading "../" from the @INC element. ie a logical "../"
4859 * Finally concatenate the prefix and the remainder of the @INC element
4860 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4861 * generates /usr/local/lib/perl5
4863 const char *libpath = SvPVX(libdir);
4864 STRLEN libpath_len = SvCUR(libdir);
4865 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4867 SV * const caret_X = get_sv("\030", 0);
4868 /* Going to use the SV just as a scratch buffer holding a C
4874 /* $^X is *the* source of taint if tainting is on, hence
4875 SvPOK() won't be true. */
4877 assert(SvPOKp(caret_X));
4878 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4879 /* Firstly take off the leading .../
4880 If all else fail we'll do the paths relative to the current
4882 sv_chop(libdir, libpath + 4);
4883 /* Don't use SvPV as we're intentionally bypassing taining,
4884 mortal copies that the mg_get of tainting creates, and
4885 corruption that seems to come via the save stack.
4886 I guess that the save stack isn't correctly set up yet. */
4887 libpath = SvPVX(libdir);
4888 libpath_len = SvCUR(libdir);
4890 /* This would work more efficiently with memrchr, but as it's
4891 only a GNU extension we'd need to probe for it and
4892 implement our own. Not hard, but maybe not worth it? */
4894 prefix = SvPVX(prefix_sv);
4895 lastslash = strrchr(prefix, '/');
4897 /* First time in with the *lastslash = '\0' we just wipe off
4898 the trailing /perl from (say) /usr/foo/bin/perl
4902 while ((*lastslash = '\0'), /* Do that, come what may. */
4903 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4904 && (lastslash = strrchr(prefix, '/')))) {
4905 if (lastslash[1] == '\0'
4906 || (lastslash[1] == '.'
4907 && (lastslash[2] == '/' /* ends "/." */
4908 || (lastslash[2] == '/'
4909 && lastslash[3] == '/' /* or "/.." */
4911 /* Prefix ends "/" or "/." or "/..", any of which
4912 are fishy, so don't do any more logical cleanup.
4916 /* Remove leading "../" from path */
4919 /* Next iteration round the loop removes the last
4920 directory name from prefix by writing a '\0' in
4921 the while clause. */
4923 /* prefix has been terminated with a '\0' to the correct
4924 length. libpath points somewhere into the libdir SV.
4925 We need to join the 2 with '/' and drop the result into
4927 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4928 SvREFCNT_dec(libdir);
4929 /* And this is the new libdir. */
4932 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4933 /* Need to taint reloccated paths if running set ID */
4934 SvTAINTED_on(libdir);
4937 SvREFCNT_dec(prefix_sv);
4942 * BEFORE pushing libdir onto @INC we may first push version- and
4943 * archname-specific sub-directories.
4945 if (addsubdirs || addoldvers) {
4946 #ifdef PERL_INC_VERSION_LIST
4947 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4948 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4949 const char * const *incver;
4955 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4957 while (unix[len-1] == '/') len--; /* Cosmetic */
4958 sv_usepvn(libdir,unix,len);
4961 PerlIO_printf(Perl_error_log,
4962 "Failed to unixify @INC element \"%s\"\n",
4966 #ifdef MACOS_TRADITIONAL
4967 #define PERL_AV_SUFFIX_FMT ""
4968 #define PERL_ARCH_FMT "%s:"
4969 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4971 #define PERL_AV_SUFFIX_FMT "/"
4972 #define PERL_ARCH_FMT "/%s"
4973 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4975 /* .../version/archname if -d .../version/archname */
4976 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4978 (int)PERL_REVISION, (int)PERL_VERSION,
4979 (int)PERL_SUBVERSION, ARCHNAME);
4980 subdir = S_incpush_if_exists(aTHX_ subdir);
4982 /* .../version if -d .../version */
4983 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4984 (int)PERL_REVISION, (int)PERL_VERSION,
4985 (int)PERL_SUBVERSION);
4986 subdir = S_incpush_if_exists(aTHX_ subdir);
4988 /* .../archname if -d .../archname */
4989 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4990 subdir = S_incpush_if_exists(aTHX_ subdir);
4994 #ifdef PERL_INC_VERSION_LIST
4996 for (incver = incverlist; *incver; incver++) {
4997 /* .../xxx if -d .../xxx */
4998 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4999 subdir = S_incpush_if_exists(aTHX_ subdir);
5005 /* finally push this lib directory on the end of @INC */
5006 av_push(GvAVn(PL_incgv), libdir);
5009 assert (SvREFCNT(subdir) == 1);
5010 SvREFCNT_dec(subdir);
5014 #ifdef USE_5005THREADS
5015 STATIC struct perl_thread *
5016 S_init_main_thread(pTHX)
5018 #if !defined(PERL_IMPLICIT_CONTEXT)
5019 struct perl_thread *thr;
5023 Newxz(thr, 1, struct perl_thread);
5024 PL_curcop = &PL_compiling;
5025 thr->interp = PERL_GET_INTERP;
5026 thr->cvcache = newHV();
5027 thr->threadsv = newAV();
5028 /* thr->threadsvp is set when find_threadsv is called */
5029 thr->specific = newAV();
5030 thr->flags = THRf_R_JOINABLE;
5031 MUTEX_INIT(&thr->mutex);
5032 /* Handcraft thrsv similarly to mess_sv */
5033 Newx(PL_thrsv, 1, SV);
5035 SvFLAGS(PL_thrsv) = SVt_PV;
5036 SvANY(PL_thrsv) = (void*)xpv;
5037 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5038 SvPV_set(PL_thrsvr, (char*)thr);
5039 SvCUR_set(PL_thrsv, sizeof(thr));
5040 SvLEN_set(PL_thrsv, sizeof(thr));
5041 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5042 thr->oursv = PL_thrsv;
5043 PL_chopset = " \n-";
5046 MUTEX_LOCK(&PL_threads_mutex);
5052 MUTEX_UNLOCK(&PL_threads_mutex);
5054 #ifdef HAVE_THREAD_INTERN
5055 Perl_init_thread_intern(thr);
5058 #ifdef SET_THREAD_SELF
5059 SET_THREAD_SELF(thr);
5061 thr->self = pthread_self();
5062 #endif /* SET_THREAD_SELF */
5066 * These must come after the thread self setting
5067 * because sv_setpvn does SvTAINT and the taint
5068 * fields thread selfness being set.
5070 PL_toptarget = NEWSV(0,0);
5071 sv_upgrade(PL_toptarget, SVt_PVFM);
5072 sv_setpvn(PL_toptarget, "", 0);
5073 PL_bodytarget = NEWSV(0,0);
5074 sv_upgrade(PL_bodytarget, SVt_PVFM);
5075 sv_setpvn(PL_bodytarget, "", 0);
5076 PL_formtarget = PL_bodytarget;
5077 thr->errsv = newSVpvs("");
5078 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5081 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5082 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5083 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5084 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5085 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5086 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5088 PL_reginterp_cnt = 0;
5092 #endif /* USE_5005THREADS */
5095 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5099 const line_t oldline = CopLINE(PL_curcop);
5105 while (av_len(paramList) >= 0) {
5106 cv = (CV*)av_shift(paramList);
5108 if (paramList == PL_beginav) {
5109 /* save PL_beginav for compiler */
5110 if (! PL_beginav_save)
5111 PL_beginav_save = newAV();
5112 av_push(PL_beginav_save, (SV*)cv);
5114 else if (paramList == PL_checkav) {
5115 /* save PL_checkav for compiler */
5116 if (! PL_checkav_save)
5117 PL_checkav_save = newAV();
5118 av_push(PL_checkav_save, (SV*)cv);
5128 (void)SvPV_const(atsv, len);
5130 PL_curcop = &PL_compiling;
5131 CopLINE_set(PL_curcop, oldline);
5132 if (paramList == PL_beginav)
5133 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5135 Perl_sv_catpvf(aTHX_ atsv,
5136 "%s failed--call queue aborted",
5137 paramList == PL_checkav ? "CHECK"
5138 : paramList == PL_initav ? "INIT"
5140 while (PL_scopestack_ix > oldscope)
5143 Perl_croak(aTHX_ "%"SVf"", atsv);
5150 /* my_exit() was called */
5151 while (PL_scopestack_ix > oldscope)
5154 PL_curstash = PL_defstash;
5155 PL_curcop = &PL_compiling;
5156 CopLINE_set(PL_curcop, oldline);
5158 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5159 if (paramList == PL_beginav)
5160 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5162 Perl_croak(aTHX_ "%s failed--call queue aborted",
5163 paramList == PL_checkav ? "CHECK"
5164 : paramList == PL_initav ? "INIT"
5171 PL_curcop = &PL_compiling;
5172 CopLINE_set(PL_curcop, oldline);
5175 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5184 S_call_list_body(pTHX_ CV *cv)
5186 PUSHMARK(PL_stack_sp);
5187 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5192 Perl_my_exit(pTHX_ U32 status)
5194 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5195 thr, (unsigned long) status));
5204 STATUS_EXIT_SET(status);
5211 Perl_my_failure_exit(pTHX)
5214 /* We have been called to fall on our sword. The desired exit code
5215 * should be already set in STATUS_UNIX, but could be shifted over
5216 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5219 * If an error code has not been set, then force the issue.
5221 if (MY_POSIX_EXIT) {
5223 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5224 * the exit code when there isn't an error.
5227 if (STATUS_UNIX == 0)
5228 STATUS_UNIX_EXIT_SET(255);
5230 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5232 /* The exit code could have been set by $? or vmsish which
5233 * means that it may not be fatal. So convert
5234 * success/warning codes to fatal.
5236 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5237 STATUS_UNIX_EXIT_SET(255);
5241 /* Traditionally Perl on VMS always expects a Fatal Error. */
5242 if (vaxc$errno & 1) {
5244 /* So force success status to failure */
5245 if (STATUS_NATIVE & 1)
5250 STATUS_UNIX = EINTR; /* In case something cares */
5255 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5257 /* Encode the severity code */
5258 severity = STATUS_NATIVE & STS$M_SEVERITY;
5259 STATUS_UNIX = (severity ? severity : 1) << 8;
5261 /* Perl expects this to be a fatal error */
5262 if (severity != STS$K_SEVERE)
5271 STATUS_UNIX_SET(errno);
5273 exitstatus = STATUS_UNIX >> 8;
5274 if (exitstatus & 255)
5275 STATUS_UNIX_SET(exitstatus);
5277 STATUS_UNIX_SET(255);
5284 S_my_exit_jump(pTHX)
5287 register PERL_CONTEXT *cx;
5292 SvREFCNT_dec(PL_e_script);
5293 PL_e_script = Nullsv;
5296 POPSTACK_TO(PL_mainstack);
5297 if (cxstack_ix >= 0) {
5300 POPBLOCK(cx,PL_curpm);
5305 PERL_UNUSED_VAR(gimme);
5306 PERL_UNUSED_VAR(newsp);
5310 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5312 const char * const p = SvPVX_const(PL_e_script);
5313 const char *nl = strchr(p, '\n');
5315 PERL_UNUSED_ARG(idx);
5316 PERL_UNUSED_ARG(maxlen);
5318 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5320 filter_del(read_e_script);
5323 sv_catpvn(buf_sv, p, nl-p);
5324 sv_chop(PL_e_script, nl);
5330 * c-indentation-style: bsd
5332 * indent-tabs-mode: t
5335 * ex: set ts=8 sts=4 sw=4 noet: