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 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
153 #ifdef PERL_IMPLICIT_CONTEXT
154 MUTEX_INIT(&PL_my_ctx_mutex);
158 PERL_SET_THX(my_perl);
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
171 /* Newx() needs interpreter, so call malloc() instead */
172 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
173 S_init_tls_and_interp(my_perl);
174 Zero(my_perl, 1, PerlInterpreter);
190 =head1 Embedding Functions
192 =for apidoc perl_alloc
194 Allocates a new Perl interpreter. See L<perlembed>.
202 PerlInterpreter *my_perl;
204 /* Newx() needs interpreter, so call malloc() instead */
205 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
207 S_init_tls_and_interp(my_perl);
208 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
210 #endif /* PERL_IMPLICIT_SYS */
213 =for apidoc perl_construct
215 Initializes a new Perl interpreter. See L<perlembed>.
221 perl_construct(pTHXx)
224 PERL_UNUSED_ARG(my_perl);
227 PL_perl_destruct_level = 1;
229 if (PL_perl_destruct_level > 0)
232 /* Init the real globals (and main thread)? */
234 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
236 PL_linestr = newSV(79);
237 sv_upgrade(PL_linestr,SVt_PVIV);
239 if (!SvREADONLY(&PL_sv_undef)) {
240 /* set read-only and try to insure than we wont see REFCNT==0
243 SvREADONLY_on(&PL_sv_undef);
244 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
246 sv_setpv(&PL_sv_no,PL_No);
247 /* value lookup in void context - happens to have the side effect
248 of caching the numeric forms. */
251 SvREADONLY_on(&PL_sv_no);
252 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_yes,PL_Yes);
257 SvREADONLY_on(&PL_sv_yes);
258 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
260 SvREADONLY_on(&PL_sv_placeholder);
261 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
264 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
265 #ifdef PERL_USES_PL_PIDSTATUS
266 PL_pidstatus = newHV();
270 PL_rs = newSVpvs("\n");
275 PL_lex_state = LEX_NOTPARSING;
281 SET_NUMERIC_STANDARD();
283 #if defined(LOCAL_PATCH_COUNT)
284 PL_localpatches = local_patches; /* For possible -v */
287 #ifdef HAVE_INTERP_INTERN
291 PerlIO_init(aTHX); /* Hook to IO system */
293 PL_fdpid = newAV(); /* for remembering popen pids by fd */
294 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
295 PL_errors = newSVpvs("");
296 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
297 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
298 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
300 PL_regex_padav = newAV();
301 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
302 PL_regex_pad = AvARRAY(PL_regex_padav);
304 #ifdef USE_REENTRANT_API
305 Perl_reentrant_init(aTHX);
308 /* Note that strtab is a rather special HV. Assumptions are made
309 about not iterating on it, and not adding tie magic to it.
310 It is properly deallocated in perl_destruct() */
313 HvSHAREKEYS_off(PL_strtab); /* mandatory */
314 hv_ksplit(PL_strtab, 512);
316 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
317 _dyld_lookup_and_bind
318 ("__environ", (unsigned long *) &environ_pointer, NULL);
322 # ifdef USE_ENVIRON_ARRAY
323 PL_origenviron = environ;
327 /* Use sysconf(_SC_CLK_TCK) if available, if not
328 * available or if the sysconf() fails, use the HZ.
329 * BeOS has those, but returns the wrong value.
330 * The HZ if not originally defined has been by now
331 * been defined as CLK_TCK, if available. */
332 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
333 PL_clocktick = sysconf(_SC_CLK_TCK);
334 if (PL_clocktick <= 0)
338 PL_stashcache = newHV();
340 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
341 (int)PERL_VERSION, (int)PERL_SUBVERSION);
344 if (!PL_mmap_page_size) {
345 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
347 SETERRNO(0, SS_NORMAL);
349 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
351 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
353 if ((long) PL_mmap_page_size < 0) {
355 SV * const error = ERRSV;
356 (void) SvUPGRADE(error, SVt_PV);
357 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
360 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
364 # ifdef HAS_GETPAGESIZE
365 PL_mmap_page_size = getpagesize();
367 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
368 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
372 if (PL_mmap_page_size <= 0)
373 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
374 (IV) PL_mmap_page_size);
376 #endif /* HAS_MMAP */
378 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
379 PL_timesbase.tms_utime = 0;
380 PL_timesbase.tms_stime = 0;
381 PL_timesbase.tms_cutime = 0;
382 PL_timesbase.tms_cstime = 0;
389 =for apidoc nothreadhook
391 Stub that provides thread hook for perl_destruct when there are
398 Perl_nothreadhook(pTHX)
403 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
405 Perl_dump_sv_child(pTHX_ SV *sv)
408 const int sock = PL_dumper_fd;
409 const int debug_fd = PerlIO_fileno(Perl_debug_log);
410 union control_un control;
413 struct cmsghdr *cmptr;
415 unsigned char buffer[256];
417 if(sock == -1 || debug_fd == -1)
420 PerlIO_flush(Perl_debug_log);
422 /* All these shenanigans are to pass a file descriptor over to our child for
423 it to dump out to. We can't let it hold open the file descriptor when it
424 forks, as the file descriptor it will dump to can turn out to be one end
425 of pipe that some other process will wait on for EOF. (So as it would
426 be open, the wait would be forever. */
428 msg.msg_control = control.control;
429 msg.msg_controllen = sizeof(control.control);
430 /* We're a connected socket so we don't need a destination */
436 cmptr = CMSG_FIRSTHDR(&msg);
437 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
438 cmptr->cmsg_level = SOL_SOCKET;
439 cmptr->cmsg_type = SCM_RIGHTS;
440 *((int *)CMSG_DATA(cmptr)) = 1;
442 vec[0].iov_base = (void*)&sv;
443 vec[0].iov_len = sizeof(sv);
444 got = sendmsg(sock, &msg, 0);
447 perror("Debug leaking scalars parent sendmsg failed");
450 if(got < sizeof(sv)) {
451 perror("Debug leaking scalars parent short sendmsg");
455 /* Return protocol is
457 unsigned char: length of location string (0 for empty)
458 unsigned char*: string (not terminated)
460 vec[0].iov_base = (void*)&returned_errno;
461 vec[0].iov_len = sizeof(returned_errno);
462 vec[1].iov_base = buffer;
465 got = readv(sock, vec, 2);
468 perror("Debug leaking scalars parent read failed");
469 PerlIO_flush(PerlIO_stderr());
472 if(got < sizeof(returned_errno) + 1) {
473 perror("Debug leaking scalars parent short read");
474 PerlIO_flush(PerlIO_stderr());
479 got = read(sock, buffer + 1, *buffer);
481 perror("Debug leaking scalars parent read 2 failed");
482 PerlIO_flush(PerlIO_stderr());
487 perror("Debug leaking scalars parent short read 2");
488 PerlIO_flush(PerlIO_stderr());
493 if (returned_errno || *buffer) {
494 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
495 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
496 returned_errno, strerror(returned_errno));
502 =for apidoc perl_destruct
504 Shuts down a Perl interpreter. See L<perlembed>.
513 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
515 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
519 PERL_UNUSED_ARG(my_perl);
521 /* wait for all pseudo-forked children to finish */
522 PERL_WAIT_FOR_CHILDREN;
524 destruct_level = PL_perl_destruct_level;
527 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
529 const int i = atoi(s);
530 if (destruct_level < i)
536 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
542 if (PL_endav && !PL_minus_c)
543 call_list(PL_scopestack_ix, PL_endav);
549 /* Need to flush since END blocks can produce output */
552 if (CALL_FPTR(PL_threadhook)(aTHX)) {
553 /* Threads hook has vetoed further cleanup */
557 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
558 if (destruct_level != 0) {
559 /* Fork here to create a child. Our child's job is to preserve the
560 state of scalars prior to destruction, so that we can instruct it
561 to dump any scalars that we later find have leaked.
562 There's no subtlety in this code - it assumes POSIX, and it doesn't
566 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
567 perror("Debug leaking scalars socketpair failed");
573 perror("Debug leaking scalars fork failed");
577 /* We are the child */
578 const int sock = fd[1];
579 const int debug_fd = PerlIO_fileno(Perl_debug_log);
582 /* Our success message is an integer 0, and a char 0 */
583 static const char success[sizeof(int) + 1];
587 /* We need to close all other file descriptors otherwise we end up
588 with interesting hangs, where the parent closes its end of a
589 pipe, and sits waiting for (another) child to terminate. Only
590 that child never terminates, because it never gets EOF, because
591 we also have the far end of the pipe open. We even need to
592 close the debugging fd, because sometimes it happens to be one
593 end of a pipe, and a process is waiting on the other end for
594 EOF. Normally it would be closed at some point earlier in
595 destruction, but if we happen to cause the pipe to remain open,
596 EOF never occurs, and we get an infinite hang. Hence all the
597 games to pass in a file descriptor if it's actually needed. */
599 f = sysconf(_SC_OPEN_MAX);
601 where = "sysconf failed";
612 union control_un control;
615 struct cmsghdr *cmptr;
619 msg.msg_control = control.control;
620 msg.msg_controllen = sizeof(control.control);
621 /* We're a connected socket so we don't need a source */
625 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
627 vec[0].iov_base = (void*)⌖
628 vec[0].iov_len = sizeof(target);
630 got = recvmsg(sock, &msg, 0);
635 where = "recv failed";
638 if(got < sizeof(target)) {
639 where = "short recv";
643 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
647 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
648 where = "wrong cmsg_len";
651 if(cmptr->cmsg_level != SOL_SOCKET) {
652 where = "wrong cmsg_level";
655 if(cmptr->cmsg_type != SCM_RIGHTS) {
656 where = "wrong cmsg_type";
660 got_fd = *(int*)CMSG_DATA(cmptr);
661 /* For our last little bit of trickery, put the file descriptor
662 back into Perl_debug_log, as if we never actually closed it
664 if(got_fd != debug_fd) {
665 if (dup2(got_fd, debug_fd) == -1) {
672 PerlIO_flush(Perl_debug_log);
674 got = write(sock, &success, sizeof(success));
677 where = "write failed";
680 if(got < sizeof(success)) {
681 where = "short write";
688 int send_errno = errno;
689 unsigned char length = (unsigned char) strlen(where);
690 struct iovec failure[3] = {
691 {(void*)&send_errno, sizeof(send_errno)},
693 {(void*)where, length}
695 int got = writev(sock, failure, 3);
696 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
697 in the parent if we try to read from the socketpair after the
698 child has exited, even if there was data to read.
699 So sleep a bit to give the parent a fighting chance of
702 _exit((got == -1) ? errno : 0);
706 PL_dumper_fd = fd[0];
711 /* We must account for everything. */
713 /* Destroy the main CV and syntax tree */
714 /* Do this now, because destroying ops can cause new SVs to be generated
715 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
716 PL_curcop to point to a valid op from which the filename structure
718 PL_curcop = &PL_compiling;
720 /* ensure comppad/curpad to refer to main's pad */
721 if (CvPADLIST(PL_main_cv)) {
722 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
724 op_free(PL_main_root);
725 PL_main_root = Nullop;
727 PL_main_start = Nullop;
728 SvREFCNT_dec(PL_main_cv);
732 /* Tell PerlIO we are about to tear things apart in case
733 we have layers which are using resources that should
737 PerlIO_destruct(aTHX);
739 if (PL_sv_objcount) {
741 * Try to destruct global references. We do this first so that the
742 * destructors and destructees still exist. Some sv's might remain.
743 * Non-referenced objects are on their own.
747 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
748 PL_defoutgv = NULL; /* may have been freed */
751 /* unhook hooks which will soon be, or use, destroyed data */
752 SvREFCNT_dec(PL_warnhook);
754 SvREFCNT_dec(PL_diehook);
757 /* call exit list functions */
758 while (PL_exitlistlen-- > 0)
759 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
761 Safefree(PL_exitlist);
766 if (destruct_level == 0){
768 DEBUG_P(debprofdump());
770 #if defined(PERLIO_LAYERS)
771 /* No more IO - including error messages ! */
772 PerlIO_cleanup(aTHX);
775 /* The exit() function will do everything that needs doing. */
779 /* jettison our possibly duplicated environment */
780 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
781 * so we certainly shouldn't free it here
784 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
785 if (environ != PL_origenviron && !PL_use_safe_putenv
787 /* only main thread can free environ[0] contents */
788 && PL_curinterp == aTHX
794 for (i = 0; environ[i]; i++)
795 safesysfree(environ[i]);
797 /* Must use safesysfree() when working with environ. */
798 safesysfree(environ);
800 environ = PL_origenviron;
803 #endif /* !PERL_MICRO */
805 /* reset so print() ends up where we expect */
809 /* the syntax tree is shared between clones
810 * so op_free(PL_main_root) only ReREFCNT_dec's
811 * REGEXPs in the parent interpreter
812 * we need to manually ReREFCNT_dec for the clones
815 I32 i = AvFILLp(PL_regex_padav) + 1;
816 SV * const * const ary = AvARRAY(PL_regex_padav);
819 SV * const resv = ary[--i];
821 if (SvFLAGS(resv) & SVf_BREAK) {
822 /* this is PL_reg_curpm, already freed
823 * flag is set in regexec.c:S_regtry
825 SvFLAGS(resv) &= ~SVf_BREAK;
827 else if(SvREPADTMP(resv)) {
828 SvREPADTMP_off(resv);
830 else if(SvIOKp(resv)) {
831 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
836 SvREFCNT_dec(PL_regex_padav);
837 PL_regex_padav = NULL;
841 SvREFCNT_dec((SV*) PL_stashcache);
842 PL_stashcache = NULL;
844 /* loosen bonds of global variables */
847 (void)PerlIO_close(PL_rsfp);
851 /* Filters for program text */
852 SvREFCNT_dec(PL_rsfp_filters);
853 PL_rsfp_filters = NULL;
856 PL_preprocess = FALSE;
862 PL_doswitches = FALSE;
863 PL_dowarn = G_WARN_OFF;
864 PL_doextract = FALSE;
865 PL_sawampersand = FALSE; /* must save all match strings */
868 Safefree(PL_inplace);
870 SvREFCNT_dec(PL_patchlevel);
873 SvREFCNT_dec(PL_e_script);
879 /* magical thingies */
881 SvREFCNT_dec(PL_ofs_sv); /* $, */
884 SvREFCNT_dec(PL_ors_sv); /* $\ */
887 SvREFCNT_dec(PL_rs); /* $/ */
890 PL_multiline = 0; /* $* */
891 Safefree(PL_osname); /* $^O */
894 SvREFCNT_dec(PL_statname);
898 /* defgv, aka *_ should be taken care of elsewhere */
900 /* clean up after study() */
901 SvREFCNT_dec(PL_lastscream);
902 PL_lastscream = NULL;
903 Safefree(PL_screamfirst);
905 Safefree(PL_screamnext);
909 Safefree(PL_efloatbuf);
913 /* startup and shutdown function lists */
914 SvREFCNT_dec(PL_beginav);
915 SvREFCNT_dec(PL_beginav_save);
916 SvREFCNT_dec(PL_endav);
917 SvREFCNT_dec(PL_checkav);
918 SvREFCNT_dec(PL_checkav_save);
919 SvREFCNT_dec(PL_initav);
921 PL_beginav_save = NULL;
924 PL_checkav_save = NULL;
927 /* shortcuts just get cleared */
936 PL_last_in_gv = NULL;
944 PL_DBassertion = NULL;
949 SvREFCNT_dec(PL_argvout_stack);
950 PL_argvout_stack = NULL;
952 SvREFCNT_dec(PL_modglobal);
954 SvREFCNT_dec(PL_preambleav);
955 PL_preambleav = NULL;
956 SvREFCNT_dec(PL_subname);
958 SvREFCNT_dec(PL_linestr);
960 #ifdef PERL_USES_PL_PIDSTATUS
961 SvREFCNT_dec(PL_pidstatus);
964 SvREFCNT_dec(PL_toptarget);
966 SvREFCNT_dec(PL_bodytarget);
967 PL_bodytarget = NULL;
968 PL_formtarget = NULL;
970 /* free locale stuff */
971 #ifdef USE_LOCALE_COLLATE
972 Safefree(PL_collation_name);
973 PL_collation_name = NULL;
976 #ifdef USE_LOCALE_NUMERIC
977 Safefree(PL_numeric_name);
978 PL_numeric_name = NULL;
979 SvREFCNT_dec(PL_numeric_radix_sv);
980 PL_numeric_radix_sv = NULL;
983 /* clear utf8 character classes */
984 SvREFCNT_dec(PL_utf8_alnum);
985 SvREFCNT_dec(PL_utf8_alnumc);
986 SvREFCNT_dec(PL_utf8_ascii);
987 SvREFCNT_dec(PL_utf8_alpha);
988 SvREFCNT_dec(PL_utf8_space);
989 SvREFCNT_dec(PL_utf8_cntrl);
990 SvREFCNT_dec(PL_utf8_graph);
991 SvREFCNT_dec(PL_utf8_digit);
992 SvREFCNT_dec(PL_utf8_upper);
993 SvREFCNT_dec(PL_utf8_lower);
994 SvREFCNT_dec(PL_utf8_print);
995 SvREFCNT_dec(PL_utf8_punct);
996 SvREFCNT_dec(PL_utf8_xdigit);
997 SvREFCNT_dec(PL_utf8_mark);
998 SvREFCNT_dec(PL_utf8_toupper);
999 SvREFCNT_dec(PL_utf8_totitle);
1000 SvREFCNT_dec(PL_utf8_tolower);
1001 SvREFCNT_dec(PL_utf8_tofold);
1002 SvREFCNT_dec(PL_utf8_idstart);
1003 SvREFCNT_dec(PL_utf8_idcont);
1004 PL_utf8_alnum = NULL;
1005 PL_utf8_alnumc = NULL;
1006 PL_utf8_ascii = NULL;
1007 PL_utf8_alpha = NULL;
1008 PL_utf8_space = NULL;
1009 PL_utf8_cntrl = NULL;
1010 PL_utf8_graph = NULL;
1011 PL_utf8_digit = NULL;
1012 PL_utf8_upper = NULL;
1013 PL_utf8_lower = NULL;
1014 PL_utf8_print = NULL;
1015 PL_utf8_punct = NULL;
1016 PL_utf8_xdigit = NULL;
1017 PL_utf8_mark = NULL;
1018 PL_utf8_toupper = NULL;
1019 PL_utf8_totitle = NULL;
1020 PL_utf8_tolower = NULL;
1021 PL_utf8_tofold = NULL;
1022 PL_utf8_idstart = NULL;
1023 PL_utf8_idcont = NULL;
1025 if (!specialWARN(PL_compiling.cop_warnings))
1026 SvREFCNT_dec(PL_compiling.cop_warnings);
1027 PL_compiling.cop_warnings = NULL;
1028 if (!specialCopIO(PL_compiling.cop_io))
1029 SvREFCNT_dec(PL_compiling.cop_io);
1030 PL_compiling.cop_io = NULL;
1031 CopFILE_free(&PL_compiling);
1032 CopSTASH_free(&PL_compiling);
1034 /* Prepare to destruct main symbol table. */
1039 SvREFCNT_dec(PL_curstname);
1040 PL_curstname = NULL;
1042 /* clear queued errors */
1043 SvREFCNT_dec(PL_errors);
1047 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1048 if (PL_scopestack_ix != 0)
1049 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1050 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1051 (long)PL_scopestack_ix);
1052 if (PL_savestack_ix != 0)
1053 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1054 "Unbalanced saves: %ld more saves than restores\n",
1055 (long)PL_savestack_ix);
1056 if (PL_tmps_floor != -1)
1057 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1058 (long)PL_tmps_floor + 1);
1059 if (cxstack_ix != -1)
1060 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1061 (long)cxstack_ix + 1);
1064 /* Now absolutely destruct everything, somehow or other, loops or no. */
1065 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1066 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1068 /* the 2 is for PL_fdpid and PL_strtab */
1069 while (PL_sv_count > 2 && sv_clean_all())
1072 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1073 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1074 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1075 SvFLAGS(PL_strtab) |= SVt_PVHV;
1077 AvREAL_off(PL_fdpid); /* no surviving entries */
1078 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1081 #ifdef HAVE_INTERP_INTERN
1085 /* Destruct the global string table. */
1087 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1088 * so that sv_free() won't fail on them.
1089 * Now that the global string table is using a single hunk of memory
1090 * for both HE and HEK, we either need to explicitly unshare it the
1091 * correct way, or actually free things here.
1094 const I32 max = HvMAX(PL_strtab);
1095 HE * const * const array = HvARRAY(PL_strtab);
1096 HE *hent = array[0];
1099 if (hent && ckWARN_d(WARN_INTERNAL)) {
1100 HE * const next = HeNEXT(hent);
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1102 "Unbalanced string table refcount: (%ld) for \"%s\"",
1103 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1110 hent = array[riter];
1115 HvARRAY(PL_strtab) = 0;
1116 HvTOTALKEYS(PL_strtab) = 0;
1117 HvFILL(PL_strtab) = 0;
1119 SvREFCNT_dec(PL_strtab);
1122 /* free the pointer tables used for cloning */
1123 ptr_table_free(PL_ptr_table);
1124 PL_ptr_table = (PTR_TBL_t*)NULL;
1127 /* free special SVs */
1129 SvREFCNT(&PL_sv_yes) = 0;
1130 sv_clear(&PL_sv_yes);
1131 SvANY(&PL_sv_yes) = NULL;
1132 SvFLAGS(&PL_sv_yes) = 0;
1134 SvREFCNT(&PL_sv_no) = 0;
1135 sv_clear(&PL_sv_no);
1136 SvANY(&PL_sv_no) = NULL;
1137 SvFLAGS(&PL_sv_no) = 0;
1141 for (i=0; i<=2; i++) {
1142 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1143 sv_clear(PERL_DEBUG_PAD(i));
1144 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1145 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1149 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1150 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1152 #ifdef DEBUG_LEAKING_SCALARS
1153 if (PL_sv_count != 0) {
1158 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1159 svend = &sva[SvREFCNT(sva)];
1160 for (sv = sva + 1; sv < svend; ++sv) {
1161 if (SvTYPE(sv) != SVTYPEMASK) {
1162 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1164 " refcnt=%"UVuf pTHX__FORMAT "\n"
1165 "\tallocated at %s:%d %s %s%s\n",
1166 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1167 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1169 sv->sv_debug_inpad ? "for" : "by",
1170 sv->sv_debug_optype ?
1171 PL_op_name[sv->sv_debug_optype]: "(none)",
1172 sv->sv_debug_cloned ? " (cloned)" : ""
1174 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1175 Perl_dump_sv_child(aTHX_ sv);
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1185 /* Wait for up to 4 seconds for child to terminate.
1186 This seems to be the least effort way of timing out on reaping
1188 struct timeval waitfor = {4, 0};
1189 int sock = PL_dumper_fd;
1193 FD_SET(sock, &rset);
1194 select(sock + 1, &rset, NULL, NULL, &waitfor);
1195 waitpid(child, &status, WNOHANG);
1203 #if defined(PERLIO_LAYERS)
1204 /* No more IO - including error messages ! */
1205 PerlIO_cleanup(aTHX);
1208 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1209 as currently layers use it rather than NULL as a marker
1210 for no arg - and will try and SvREFCNT_dec it.
1212 SvREFCNT(&PL_sv_undef) = 0;
1213 SvREADONLY_off(&PL_sv_undef);
1215 Safefree(PL_origfilename);
1216 PL_origfilename = NULL;
1217 Safefree(PL_reg_start_tmp);
1218 PL_reg_start_tmp = (char**)NULL;
1219 PL_reg_start_tmpl = 0;
1220 Safefree(PL_reg_curpm);
1221 Safefree(PL_reg_poscache);
1222 free_tied_hv_pool();
1223 Safefree(PL_op_mask);
1224 Safefree(PL_psig_ptr);
1225 PL_psig_ptr = (SV**)NULL;
1226 Safefree(PL_psig_name);
1227 PL_psig_name = (SV**)NULL;
1228 Safefree(PL_bitcount);
1230 Safefree(PL_psig_pend);
1231 PL_psig_pend = (int*)NULL;
1234 PL_tainting = FALSE;
1235 PL_taint_warn = FALSE;
1236 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1239 DEBUG_P(debprofdump());
1241 #ifdef USE_REENTRANT_API
1242 Perl_reentrant_free(aTHX);
1247 /* As the absolutely last thing, free the non-arena SV for mess() */
1250 /* we know that type == SVt_PVMG */
1252 /* it could have accumulated taint magic */
1255 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1256 moremagic = mg->mg_moremagic;
1257 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1259 Safefree(mg->mg_ptr);
1263 /* we know that type >= SVt_PV */
1264 SvPV_free(PL_mess_sv);
1265 Safefree(SvANY(PL_mess_sv));
1266 Safefree(PL_mess_sv);
1273 =for apidoc perl_free
1275 Releases a Perl interpreter. See L<perlembed>.
1283 #if defined(WIN32) || defined(NETWARE)
1284 # if defined(PERL_IMPLICIT_SYS)
1286 void *host = nw_internal_host;
1288 void *host = w32_internal_host;
1290 PerlMem_free(aTHXx);
1292 nw_delete_internal_host(host);
1294 win32_delete_internal_host(host);
1297 PerlMem_free(aTHXx);
1300 PerlMem_free(aTHXx);
1304 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1305 /* provide destructors to clean up the thread key when libperl is unloaded */
1306 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1308 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1309 #pragma fini "perl_fini"
1313 #if defined(__GNUC__)
1314 __attribute__((destructor))
1324 #endif /* THREADS */
1327 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1330 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1331 PL_exitlist[PL_exitlistlen].fn = fn;
1332 PL_exitlist[PL_exitlistlen].ptr = ptr;
1336 #ifdef HAS_PROCSELFEXE
1337 /* This is a function so that we don't hold on to MAXPATHLEN
1338 bytes of stack longer than necessary
1341 S_procself_val(pTHX_ SV *sv, const char *arg0)
1343 char buf[MAXPATHLEN];
1344 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1346 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1347 includes a spurious NUL which will cause $^X to fail in system
1348 or backticks (this will prevent extensions from being built and
1349 many tests from working). readlink is not meant to add a NUL.
1350 Normal readlink works fine.
1352 if (len > 0 && buf[len-1] == '\0') {
1356 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1357 returning the text "unknown" from the readlink rather than the path
1358 to the executable (or returning an error from the readlink). Any valid
1359 path has a '/' in it somewhere, so use that to validate the result.
1360 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1362 if (len > 0 && memchr(buf, '/', len)) {
1363 sv_setpvn(sv,buf,len);
1369 #endif /* HAS_PROCSELFEXE */
1372 S_set_caret_X(pTHX) {
1374 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1376 #ifdef HAS_PROCSELFEXE
1377 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1380 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1382 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1389 =for apidoc perl_parse
1391 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1397 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1404 PERL_UNUSED_VAR(my_perl);
1406 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1409 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1410 setuid perl scripts securely.\n");
1411 #endif /* IAMSUID */
1414 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1415 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1416 * This MUST be done before any hash stores or fetches take place.
1417 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1418 * yourself, it is your responsibility to provide a good random seed!
1419 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1420 if (!PL_rehash_seed_set)
1421 PL_rehash_seed = get_hash_seed();
1423 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1425 if (s && (atoi(s) == 1))
1426 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1428 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1433 if (PL_origalen != 0) {
1434 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1437 /* Set PL_origalen be the sum of the contiguous argv[]
1438 * elements plus the size of the env in case that it is
1439 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1440 * as the maximum modifiable length of $0. In the worst case
1441 * the area we are able to modify is limited to the size of
1442 * the original argv[0]. (See below for 'contiguous', though.)
1444 const char *s = NULL;
1447 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1448 /* Do the mask check only if the args seem like aligned. */
1450 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1452 /* See if all the arguments are contiguous in memory. Note
1453 * that 'contiguous' is a loose term because some platforms
1454 * align the argv[] and the envp[]. If the arguments look
1455 * like non-aligned, assume that they are 'strictly' or
1456 * 'traditionally' contiguous. If the arguments look like
1457 * aligned, we just check that they are within aligned
1458 * PTRSIZE bytes. As long as no system has something bizarre
1459 * like the argv[] interleaved with some other data, we are
1460 * fine. (Did I just evoke Murphy's Law?) --jhi */
1461 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1463 for (i = 1; i < PL_origargc; i++) {
1464 if ((PL_origargv[i] == s + 1
1466 || PL_origargv[i] == s + 2
1471 (PL_origargv[i] > s &&
1473 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1483 /* Can we grab env area too to be used as the area for $0? */
1484 if (s && PL_origenviron) {
1485 if ((PL_origenviron[0] == s + 1
1487 || (PL_origenviron[0] == s + 9 && (s += 8))
1492 (PL_origenviron[0] > s &&
1493 PL_origenviron[0] <=
1494 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1498 s = PL_origenviron[0];
1501 my_setenv("NoNe SuCh", NULL);
1502 /* Force copy of environment. */
1503 for (i = 1; PL_origenviron[i]; i++) {
1504 if (PL_origenviron[i] == s + 1
1507 (PL_origenviron[i] > s &&
1508 PL_origenviron[i] <=
1509 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1512 s = PL_origenviron[i];
1520 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1525 /* Come here if running an undumped a.out. */
1527 PL_origfilename = savepv(argv[0]);
1528 PL_do_undump = FALSE;
1529 cxstack_ix = -1; /* start label stack again */
1531 assert (!PL_tainted);
1533 S_set_caret_X(aTHX);
1535 init_postdump_symbols(argc,argv,env);
1540 op_free(PL_main_root);
1541 PL_main_root = Nullop;
1543 PL_main_start = Nullop;
1544 SvREFCNT_dec(PL_main_cv);
1548 oldscope = PL_scopestack_ix;
1549 PL_dowarn = G_WARN_OFF;
1554 parse_body(env,xsinit);
1556 call_list(oldscope, PL_checkav);
1563 /* my_exit() was called */
1564 while (PL_scopestack_ix > oldscope)
1567 PL_curstash = PL_defstash;
1569 call_list(oldscope, PL_checkav);
1573 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1582 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1585 int argc = PL_origargc;
1586 char **argv = PL_origargv;
1587 const char *scriptname = NULL;
1588 VOL bool dosearch = FALSE;
1589 const char *validarg = "";
1592 const char *cddir = NULL;
1593 #ifdef USE_SITECUSTOMIZE
1594 bool minus_f = FALSE;
1597 sv_setpvn(PL_linestr,"",0);
1598 sv = newSVpvs(""); /* first used for -I flags */
1602 for (argc--,argv++; argc > 0; argc--,argv++) {
1603 if (argv[0][0] != '-' || !argv[0][1])
1607 validarg = " PHOOEY ";
1611 * Can we rely on the kernel to start scripts with argv[1] set to
1612 * contain all #! line switches (the whole line)? (argv[0] is set to
1613 * the interpreter name, argv[2] to the script name; argv[3] and
1614 * above may contain other arguments.)
1621 #ifndef PERL_STRICT_CR
1646 if ((s = moreswitches(s, -1)))
1651 CHECK_MALLOC_TOO_LATE_FOR('t');
1652 if( !PL_tainting ) {
1653 PL_taint_warn = TRUE;
1659 CHECK_MALLOC_TOO_LATE_FOR('T');
1661 PL_taint_warn = FALSE;
1669 #ifdef MACOS_TRADITIONAL
1670 /* ignore -e for Dev:Pseudo argument */
1671 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1674 forbid_setid('e', -1);
1676 PL_e_script = newSVpvs("");
1677 filter_add(read_e_script, NULL);
1680 sv_catpv(PL_e_script, s);
1682 sv_catpv(PL_e_script, argv[1]);
1686 Perl_croak(aTHX_ "No code specified for -%c", *s);
1687 sv_catpvs(PL_e_script, "\n");
1691 #ifdef USE_SITECUSTOMIZE
1697 case 'I': /* -I handled both here and in moreswitches() */
1698 forbid_setid('I', -1);
1699 if (!*++s && (s=argv[1]) != NULL) {
1703 STRLEN len = strlen(s);
1704 const char * const p = savepvn(s, len);
1705 incpush(p, TRUE, TRUE, FALSE, FALSE);
1706 sv_catpvs(sv, "-I");
1707 sv_catpvn(sv, p, len);
1712 Perl_croak(aTHX_ "No directory specified for -I");
1715 forbid_setid('P', -1);
1716 PL_preprocess = TRUE;
1720 forbid_setid('S', -1);
1729 PL_preambleav = newAV();
1730 av_push(PL_preambleav,
1731 newSVpvs("use Config;"));
1735 opts_prog = newSVpvs("print Config::myconfig(),");
1737 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1739 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1741 opts = SvCUR(opts_prog);
1743 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1747 # ifdef DEBUG_LEAKING_SCALARS
1748 " DEBUG_LEAKING_SCALARS"
1750 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1751 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1753 # ifdef FAKE_THREADS
1756 # ifdef MULTIPLICITY
1765 # ifdef PERL_DONT_CREATE_GVSV
1766 " PERL_DONT_CREATE_GVSV"
1768 # ifdef PERL_GLOBAL_STRUCT
1769 " PERL_GLOBAL_STRUCT"
1771 # ifdef PERL_IMPLICIT_CONTEXT
1772 " PERL_IMPLICIT_CONTEXT"
1774 # ifdef PERL_IMPLICIT_SYS
1775 " PERL_IMPLICIT_SYS"
1777 # ifdef PERL_MALLOC_WRAP
1780 # ifdef PERL_NEED_APPCTX
1783 # ifdef PERL_NEED_TIMESBASE
1784 " PERL_NEED_TIMESBASE"
1786 # ifdef PERL_OLD_COPY_ON_WRITE
1787 " PERL_OLD_COPY_ON_WRITE"
1789 # ifdef PERL_TRACK_MEMPOOL
1790 " PERL_TRACK_MEMPOOL"
1792 # ifdef PERL_USE_SAFE_PUTENV
1793 " PERL_USE_SAFE_PUTENV"
1795 #ifdef PERL_USES_PL_PIDSTATUS
1796 " PERL_USES_PL_PIDSTATUS"
1798 # ifdef PL_OP_SLAB_ALLOC
1801 # ifdef THREADS_HAVE_PIDS
1802 " THREADS_HAVE_PIDS"
1804 # ifdef USE_5005THREADS
1807 # ifdef USE_64_BIT_ALL
1810 # ifdef USE_64_BIT_INT
1813 # ifdef USE_ITHREADS
1816 # ifdef USE_LARGE_FILES
1819 # ifdef USE_LONG_DOUBLE
1825 # ifdef USE_REENTRANT_API
1826 " USE_REENTRANT_API"
1831 # ifdef USE_SITECUSTOMIZE
1832 " USE_SITECUSTOMIZE"
1839 while (SvCUR(opts_prog) > opts+76) {
1840 /* find last space after "options: " and before col 76
1844 char * const pv = SvPV_nolen(opts_prog);
1845 const char c = pv[opts+76];
1847 space = strrchr(pv+opts+26, ' ');
1849 if (!space) break; /* "Can't happen" */
1851 /* break the line before that space */
1854 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1855 STR_WITH_LEN("\\n "));
1858 sv_catpvs(opts_prog,"\\n\",");
1860 #if defined(LOCAL_PATCH_COUNT)
1861 if (LOCAL_PATCH_COUNT > 0) {
1863 sv_catpvs(opts_prog,
1864 "\" Locally applied patches:\\n\",");
1865 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1866 if (PL_localpatches[i])
1867 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1868 0, PL_localpatches[i], 0);
1872 Perl_sv_catpvf(aTHX_ opts_prog,
1873 "\" Built under %s\\n\"",OSNAME);
1876 Perl_sv_catpvf(aTHX_ opts_prog,
1877 ",\" Compiled at %s %s\\n\"",__DATE__,
1880 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1884 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1885 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1886 "sort grep {/^PERL/} keys %ENV; ");
1888 sv_catpvs(opts_prog,
1889 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1891 sv_catpvs(opts_prog,
1892 "print \" \\%ENV:\\n @env\\n\" if @env;"
1893 "print \" \\@INC:\\n @INC\\n\";");
1897 opts_prog = Perl_newSVpvf(aTHX_
1898 "Config::config_vars(qw%c%s%c)",
1902 av_push(PL_preambleav, opts_prog);
1903 /* don't look for script or read stdin */
1904 scriptname = BIT_BUCKET;
1908 PL_doextract = TRUE;
1916 if (!*++s || isSPACE(*s)) {
1920 /* catch use of gnu style long options */
1921 if (strEQ(s, "version")) {
1925 if (strEQ(s, "help")) {
1932 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1938 #ifndef SECURE_INTERNAL_GETENV
1941 (s = PerlEnv_getenv("PERL5OPT")))
1943 const char *popt = s;
1946 if (*s == '-' && *(s+1) == 'T') {
1947 CHECK_MALLOC_TOO_LATE_FOR('T');
1949 PL_taint_warn = FALSE;
1952 char *popt_copy = NULL;
1965 if (!strchr("CDIMUdmtwA", *s))
1966 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1970 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1971 s = popt_copy + (s - popt);
1972 d = popt_copy + (d - popt);
1979 if( !PL_tainting ) {
1980 PL_taint_warn = TRUE;
1984 moreswitches(d, -1);
1990 #ifdef USE_SITECUSTOMIZE
1993 PL_preambleav = newAV();
1994 av_unshift(PL_preambleav, 1);
1995 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1999 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2000 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2004 scriptname = argv[0];
2007 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2009 else if (scriptname == NULL) {
2011 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2012 moreswitches("h", -1);
2017 /* Set $^X early so that it can be used for relocatable paths in @INC */
2018 assert (!PL_tainted);
2020 S_set_caret_X(aTHX);
2027 = open_script(scriptname, dosearch, sv, &suidscript);
2029 validate_suid(validarg, scriptname, fdscript, suidscript);
2032 # if defined(SIGCHLD) || defined(SIGCLD)
2035 # define SIGCHLD SIGCLD
2037 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2038 if (sigstate == (Sighandler_t) SIG_IGN) {
2039 if (ckWARN(WARN_SIGNAL))
2040 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2041 "Can't ignore signal CHLD, forcing to default");
2042 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2049 #ifdef MACOS_TRADITIONAL
2050 || gMacPerl_AlwaysExtract
2053 find_beginning(suidscript);
2054 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2055 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2059 PL_main_cv = PL_compcv = (CV*)newSV(0);
2060 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2061 CvUNIQUE_on(PL_compcv);
2063 CvPADLIST(PL_compcv) = pad_new(0);
2064 #ifdef USE_5005THREADS
2065 CvOWNER(PL_compcv) = 0;
2066 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2067 MUTEX_INIT(CvMUTEXP(PL_compcv));
2068 #endif /* USE_5005THREADS */
2071 boot_core_UNIVERSAL();
2072 boot_core_xsutils();
2075 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2077 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2083 # ifdef HAS_SOCKS5_INIT
2084 socks5_init(argv[0]);
2090 init_predump_symbols();
2091 /* init_postdump_symbols not currently designed to be called */
2092 /* more than once (ENV isn't cleared first, for example) */
2093 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2095 init_postdump_symbols(argc,argv,env);
2097 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2098 * or explicitly in some platforms.
2099 * locale.c:Perl_init_i18nl10n() if the environment
2100 * look like the user wants to use UTF-8. */
2101 #if defined(__SYMBIAN32__)
2102 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2105 /* Requires init_predump_symbols(). */
2106 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2111 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2112 * and the default open disciplines. */
2113 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2114 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2116 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2117 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2118 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2120 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2121 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2122 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2124 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2125 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2126 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2128 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2129 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2132 sv_setpvn(sv, ":utf8\0:utf8", 11);
2134 sv_setpvn(sv, ":utf8\0", 6);
2137 sv_setpvn(sv, "\0:utf8", 6);
2143 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2144 if (strEQ(s, "unsafe"))
2145 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2146 else if (strEQ(s, "safe"))
2147 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2149 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2154 /* now parse the script */
2156 SETERRNO(0,SS_NORMAL);
2158 #ifdef MACOS_TRADITIONAL
2159 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2161 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2163 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2164 MacPerl_MPWFileName(PL_origfilename));
2168 if (yyparse() || PL_error_count) {
2170 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2172 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2177 CopLINE_set(PL_curcop, 0);
2178 PL_curstash = PL_defstash;
2179 PL_preprocess = FALSE;
2181 SvREFCNT_dec(PL_e_script);
2189 SAVECOPFILE(PL_curcop);
2190 SAVECOPLINE(PL_curcop);
2191 gv_check(PL_defstash);
2198 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2199 dump_mstats("after compilation:");
2208 =for apidoc perl_run
2210 Tells a Perl interpreter to run. See L<perlembed>.
2223 PERL_UNUSED_ARG(my_perl);
2225 oldscope = PL_scopestack_ix;
2233 cxstack_ix = -1; /* start context stack again */
2235 case 0: /* normal completion */
2239 case 2: /* my_exit() */
2240 while (PL_scopestack_ix > oldscope)
2243 PL_curstash = PL_defstash;
2244 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2245 PL_endav && !PL_minus_c)
2246 call_list(oldscope, PL_endav);
2248 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2249 dump_mstats("after execution: ");
2255 POPSTACK_TO(PL_mainstack);
2258 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2270 S_run_body(pTHX_ I32 oldscope)
2273 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2274 PL_sawampersand ? "Enabling" : "Omitting"));
2276 if (!PL_restartop) {
2277 DEBUG_x(dump_all());
2280 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2282 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2286 #ifdef MACOS_TRADITIONAL
2287 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2288 (gMacPerl_ErrorFormat ? "# " : ""),
2289 MacPerl_MPWFileName(PL_origfilename));
2291 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2295 if (PERLDB_SINGLE && PL_DBsingle)
2296 sv_setiv(PL_DBsingle, 1);
2298 call_list(oldscope, PL_initav);
2304 PL_op = PL_restartop;
2308 else if (PL_main_start) {
2309 CvDEPTH(PL_main_cv) = 1;
2310 PL_op = PL_main_start;
2318 =head1 SV Manipulation Functions
2320 =for apidoc p||get_sv
2322 Returns the SV of the specified Perl scalar. If C<create> is set and the
2323 Perl variable does not exist then it will be created. If C<create> is not
2324 set and the variable does not exist then NULL is returned.
2330 Perl_get_sv(pTHX_ const char *name, I32 create)
2333 #ifdef USE_5005THREADS
2334 if (name[1] == '\0' && !isALPHA(name[0])) {
2335 PADOFFSET tmp = find_threadsv(name);
2336 if (tmp != NOT_IN_PAD)
2337 return THREADSV(tmp);
2339 #endif /* USE_5005THREADS */
2340 gv = gv_fetchpv(name, create, SVt_PV);
2347 =head1 Array Manipulation Functions
2349 =for apidoc p||get_av
2351 Returns the AV of the specified Perl array. If C<create> is set and the
2352 Perl variable does not exist then it will be created. If C<create> is not
2353 set and the variable does not exist then NULL is returned.
2359 Perl_get_av(pTHX_ const char *name, I32 create)
2361 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2370 =head1 Hash Manipulation Functions
2372 =for apidoc p||get_hv
2374 Returns the HV of the specified Perl hash. If C<create> is set and the
2375 Perl variable does not exist then it will be created. If C<create> is not
2376 set and the variable does not exist then NULL is returned.
2382 Perl_get_hv(pTHX_ const char *name, I32 create)
2384 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2393 =head1 CV Manipulation Functions
2395 =for apidoc p||get_cv
2397 Returns the CV of the specified Perl subroutine. If C<create> is set and
2398 the Perl subroutine does not exist then it will be declared (which has the
2399 same effect as saying C<sub name;>). If C<create> is not set and the
2400 subroutine does not exist then NULL is returned.
2406 Perl_get_cv(pTHX_ const char *name, I32 create)
2408 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2409 /* XXX unsafe for threads if eval_owner isn't held */
2410 /* XXX this is probably not what they think they're getting.
2411 * It has the same effect as "sub name;", i.e. just a forward
2413 if (create && !GvCVu(gv))
2414 return newSUB(start_subparse(FALSE, 0),
2415 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2423 /* Be sure to refetch the stack pointer after calling these routines. */
2427 =head1 Callback Functions
2429 =for apidoc p||call_argv
2431 Performs a callback to the specified Perl sub. See L<perlcall>.
2437 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2439 /* See G_* flags in cop.h */
2440 /* null terminated arg list */
2448 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2453 return call_pv(sub_name, flags);
2457 =for apidoc p||call_pv
2459 Performs a callback to the specified Perl sub. See L<perlcall>.
2465 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2466 /* name of the subroutine */
2467 /* See G_* flags in cop.h */
2469 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2473 =for apidoc p||call_method
2475 Performs a callback to the specified Perl method. The blessed object must
2476 be on the stack. See L<perlcall>.
2482 Perl_call_method(pTHX_ const char *methname, I32 flags)
2483 /* name of the subroutine */
2484 /* See G_* flags in cop.h */
2486 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2489 /* May be called with any of a CV, a GV, or an SV containing the name. */
2491 =for apidoc p||call_sv
2493 Performs a callback to the Perl sub whose name is in the SV. See
2500 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2501 /* See G_* flags in cop.h */
2504 LOGOP myop; /* fake syntax tree node */
2507 volatile I32 retval = 0;
2509 bool oldcatch = CATCH_GET;
2511 OP* const oldop = PL_op;
2514 if (flags & G_DISCARD) {
2519 Zero(&myop, 1, LOGOP);
2520 myop.op_next = Nullop;
2521 if (!(flags & G_NOARGS))
2522 myop.op_flags |= OPf_STACKED;
2523 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2524 (flags & G_ARRAY) ? OPf_WANT_LIST :
2529 EXTEND(PL_stack_sp, 1);
2530 *++PL_stack_sp = sv;
2532 oldscope = PL_scopestack_ix;
2534 if (PERLDB_SUB && PL_curstash != PL_debstash
2535 /* Handle first BEGIN of -d. */
2536 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2537 /* Try harder, since this may have been a sighandler, thus
2538 * curstash may be meaningless. */
2539 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2540 && !(flags & G_NODEBUG))
2541 PL_op->op_private |= OPpENTERSUB_DB;
2543 if (flags & G_METHOD) {
2544 Zero(&method_op, 1, UNOP);
2545 method_op.op_next = PL_op;
2546 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2547 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2548 PL_op = (OP*)&method_op;
2551 if (!(flags & G_EVAL)) {
2553 call_body((OP*)&myop, FALSE);
2554 retval = PL_stack_sp - (PL_stack_base + oldmark);
2555 CATCH_SET(oldcatch);
2558 myop.op_other = (OP*)&myop;
2560 /* we're trying to emulate pp_entertry() here */
2562 register PERL_CONTEXT *cx;
2563 const I32 gimme = GIMME_V;
2568 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2570 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2572 PL_in_eval = EVAL_INEVAL;
2573 if (flags & G_KEEPERR)
2574 PL_in_eval |= EVAL_KEEPERR;
2576 sv_setpvn(ERRSV,"",0);
2584 call_body((OP*)&myop, FALSE);
2585 retval = PL_stack_sp - (PL_stack_base + oldmark);
2586 if (!(flags & G_KEEPERR))
2587 sv_setpvn(ERRSV,"",0);
2593 /* my_exit() was called */
2594 PL_curstash = PL_defstash;
2597 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2598 Perl_croak(aTHX_ "Callback called exit");
2603 PL_op = PL_restartop;
2607 PL_stack_sp = PL_stack_base + oldmark;
2608 if (flags & G_ARRAY)
2612 *++PL_stack_sp = &PL_sv_undef;
2617 if (PL_scopestack_ix > oldscope) {
2621 register PERL_CONTEXT *cx;
2628 PERL_UNUSED_VAR(newsp);
2629 PERL_UNUSED_VAR(gimme);
2630 PERL_UNUSED_VAR(optype);
2635 if (flags & G_DISCARD) {
2636 PL_stack_sp = PL_stack_base + oldmark;
2646 S_call_body(pTHX_ const OP *myop, bool is_eval)
2649 if (PL_op == myop) {
2651 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2653 PL_op = Perl_pp_entersub(aTHX); /* this does */
2659 /* Eval a string. The G_EVAL flag is always assumed. */
2662 =for apidoc p||eval_sv
2664 Tells Perl to C<eval> the string in the SV.
2670 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2672 /* 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)
2769 SV* sv = newSVpv(p, 0);
2771 eval_sv(sv, G_SCALAR);
2778 if (croak_on_error && SvTRUE(ERRSV)) {
2779 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2785 /* Require a module. */
2788 =head1 Embedding Functions
2790 =for apidoc p||require_pv
2792 Tells Perl to C<require> the file named by the string argument. It is
2793 analogous to the Perl code C<eval "require '$file'">. It's even
2794 implemented that way; consider using load_module instead.
2799 Perl_require_pv(pTHX_ const char *pv)
2804 PUSHSTACKi(PERLSI_REQUIRE);
2806 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2807 eval_sv(sv_2mortal(sv), G_DISCARD);
2813 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2815 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2818 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2822 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2824 /* This message really ought to be max 23 lines.
2825 * Removed -h because the user already knows that option. Others? */
2827 static const char * const usage_msg[] = {
2828 "-0[octal] specify record separator (\\0, if no argument)",
2829 "-A[mod][=pattern] activate all/given assertions",
2830 "-a autosplit mode with -n or -p (splits $_ into @F)",
2831 "-C[number/list] enables the listed Unicode features",
2832 "-c check syntax only (runs BEGIN and CHECK blocks)",
2833 "-d[:debugger] run program under debugger",
2834 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2835 "-e program one line of program (several -e's allowed, omit programfile)",
2836 "-E program like -e, but enables all optional features",
2837 "-f don't do $sitelib/sitecustomize.pl at startup",
2838 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2839 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2840 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2841 "-l[octal] enable line ending processing, specifies line terminator",
2842 "-[mM][-]module execute \"use/no module...\" before executing program",
2843 "-n assume \"while (<>) { ... }\" loop around program",
2844 "-p assume loop like -n but print line also, like sed",
2845 "-P run program through C preprocessor before compilation",
2846 "-s enable rudimentary parsing for switches after programfile",
2847 "-S look for programfile using PATH environment variable",
2848 "-t enable tainting warnings",
2849 "-T enable tainting checks",
2850 "-u dump core after parsing program",
2851 "-U allow unsafe operations",
2852 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2853 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2854 "-w enable many useful warnings (RECOMMENDED)",
2855 "-W enable all warnings",
2856 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2857 "-X disable all warnings",
2861 const char * const *p = usage_msg;
2863 PerlIO_printf(PerlIO_stdout(),
2864 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2867 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2870 /* convert a string of -D options (or digits) into an int.
2871 * sets *s to point to the char after the options */
2875 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2877 static const char * const usage_msgd[] = {
2878 " Debugging flag values: (see also -d)",
2879 " p Tokenizing and parsing (with v, displays parse stack)",
2880 " s Stack snapshots (with v, displays all stacks)",
2881 " l Context (loop) stack processing",
2882 " t Trace execution",
2883 " o Method and overloading resolution",
2884 " c String/numeric conversions",
2885 " P Print profiling info, preprocessor command for -P, source file input state",
2886 " m Memory allocation",
2887 " f Format processing",
2888 " r Regular expression parsing and execution",
2889 " x Syntax tree dump",
2890 " u Tainting checks",
2891 " H Hash dump -- usurps values()",
2892 " X Scratchpad allocation",
2894 " S Thread synchronization",
2896 " R Include reference counts of dumped variables (eg when using -Ds)",
2897 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2898 " v Verbose: use in conjunction with other flags",
2900 " A Consistency checks on internal structures",
2901 " q quiet - currently only suppresses the 'EXECUTING' message",
2906 /* if adding extra options, remember to update DEBUG_MASK */
2907 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2909 for (; isALNUM(**s); (*s)++) {
2910 const char * const d = strchr(debopts,**s);
2912 i |= 1 << (d - debopts);
2913 else if (ckWARN_d(WARN_DEBUGGING))
2914 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2915 "invalid option -D%c, use -D'' to see choices\n", **s);
2918 else if (isDIGIT(**s)) {
2920 for (; isALNUM(**s); (*s)++) ;
2922 else if (givehelp) {
2923 const char *const *p = usage_msgd;
2924 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2927 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2928 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2929 "-Dp not implemented on this platform\n");
2935 /* This routine handles any switches that can be given during run */
2938 Perl_moreswitches(pTHX_ char *s, const int suidscript)
2949 SvREFCNT_dec(PL_rs);
2950 if (s[1] == 'x' && s[2]) {
2951 const char *e = s+=2;
2957 flags = PERL_SCAN_SILENT_ILLDIGIT;
2958 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2959 if (s + numlen < e) {
2960 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2964 PL_rs = newSVpvs("");
2965 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2966 tmps = (U8*)SvPVX(PL_rs);
2967 uvchr_to_utf8(tmps, rschar);
2968 SvCUR_set(PL_rs, UNISKIP(rschar));
2973 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2974 if (rschar & ~((U8)~0))
2975 PL_rs = &PL_sv_undef;
2976 else if (!rschar && numlen >= 2)
2977 PL_rs = newSVpvs("");
2979 char ch = (char)rschar;
2980 PL_rs = newSVpvn(&ch, 1);
2983 sv_setsv(get_sv("/", TRUE), PL_rs);
2988 PL_unicode = parse_unicode_opts( (const char **)&s );
2993 while (*s && !isSPACE(*s)) ++s;
2995 PL_splitstr = savepv(PL_splitstr);
3006 forbid_setid('d', suidscript);
3009 /* -dt indicates to the debugger that threads will be used */
3010 if (*s == 't' && !isALNUM(s[1])) {
3012 my_setenv("PERL5DB_THREADED", "1");
3015 /* The following permits -d:Mod to accepts arguments following an =
3016 in the fashion that -MSome::Mod does. */
3017 if (*s == ':' || *s == '=') {
3019 SV * const sv = newSVpvs("use Devel::");
3021 /* We now allow -d:Module=Foo,Bar */
3022 while(isALNUM(*s) || *s==':') ++s;
3024 sv_catpv(sv, start);
3026 sv_catpvn(sv, start, s-start);
3027 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3030 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3033 PL_perldb = PERLDB_ALL;
3040 forbid_setid('D', suidscript);
3042 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3043 #else /* !DEBUGGING */
3044 if (ckWARN_d(WARN_DEBUGGING))
3045 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3046 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3047 for (s++; isALNUM(*s); s++) ;
3052 usage(PL_origargv[0]);
3055 Safefree(PL_inplace);
3056 #if defined(__CYGWIN__) /* do backup extension automagically */
3057 if (*(s+1) == '\0') {
3058 PL_inplace = savepvs(".bak");
3061 #endif /* __CYGWIN__ */
3062 PL_inplace = savepv(s+1);
3063 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3067 if (*s == '-') /* Additional switches on #! line. */
3071 case 'I': /* -I handled both here and in parse_body() */
3072 forbid_setid('I', suidscript);
3074 while (*s && isSPACE(*s))
3079 /* ignore trailing spaces (possibly followed by other switches) */
3081 for (e = p; *e && !isSPACE(*e); e++) ;
3085 } while (*p && *p != '-');
3086 e = savepvn(s, e-s);
3087 incpush(e, TRUE, TRUE, FALSE, FALSE);
3094 Perl_croak(aTHX_ "No directory specified for -I");
3100 SvREFCNT_dec(PL_ors_sv);
3106 PL_ors_sv = newSVpvs("\n");
3107 numlen = 3 + (*s == '0');
3108 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3112 if (RsPARA(PL_rs)) {
3113 PL_ors_sv = newSVpvs("\n\n");
3116 PL_ors_sv = newSVsv(PL_rs);
3121 forbid_setid('A', suidscript);
3123 PL_preambleav = newAV();
3126 char * const start = s;
3127 SV * const sv = newSVpvs("use assertions::activate");
3128 while(isALNUM(*s) || *s == ':') ++s;
3130 sv_catpvs(sv, "::");
3131 sv_catpvn(sv, start, s-start);
3134 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3137 else if (*s != '\0') {
3138 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3140 av_push(PL_preambleav, sv);
3144 forbid_setid('M', suidscript); /* XXX ? */
3147 forbid_setid('m', suidscript); /* XXX ? */
3151 const char *use = "use ";
3152 /* -M-foo == 'no foo' */
3153 /* Leading space on " no " is deliberate, to make both
3154 possibilities the same length. */
3155 if (*s == '-') { use = " no "; ++s; }
3156 sv = newSVpvn(use,4);
3158 /* We allow -M'Module qw(Foo Bar)' */
3159 while(isALNUM(*s) || *s==':') ++s;
3161 sv_catpv(sv, start);
3162 if (*(start-1) == 'm') {
3164 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3165 sv_catpvs( sv, " ()");
3169 Perl_croak(aTHX_ "Module name required with -%c option",
3171 sv_catpvn(sv, start, s-start);
3172 sv_catpvs(sv, " split(/,/,q");
3173 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3175 sv_catpvs(sv, "\0)");
3179 PL_preambleav = newAV();
3180 av_push(PL_preambleav, sv);
3183 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3194 forbid_setid('s', suidscript);
3195 PL_doswitches = TRUE;
3209 #ifdef MACOS_TRADITIONAL
3210 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3212 PL_do_undump = TRUE;
3220 if (!sv_derived_from(PL_patchlevel, "version"))
3221 upg_version(PL_patchlevel);
3223 PerlIO_printf(PerlIO_stdout(),
3224 Perl_form(aTHX_ "\nThis is perl, %"SVf
3225 #ifdef PERL_PATCHNUM
3226 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3229 vstringify(PL_patchlevel),
3232 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3233 PerlIO_printf(PerlIO_stdout(),
3234 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3235 vstringify(PL_patchlevel)));
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ " built under %s at %s %s\n",
3238 OSNAME, __DATE__, __TIME__));
3239 PerlIO_printf(PerlIO_stdout(),
3240 Perl_form(aTHX_ " OS Specific Release: %s\n",
3244 #if defined(LOCAL_PATCH_COUNT)
3245 if (LOCAL_PATCH_COUNT > 0)
3246 PerlIO_printf(PerlIO_stdout(),
3247 "\n(with %d registered patch%s, "
3248 "see perl -V for more detail)",
3249 (int)LOCAL_PATCH_COUNT,
3250 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\n\nCopyright 1987-2006, Larry Wall\n");
3255 #ifdef MACOS_TRADITIONAL
3256 PerlIO_printf(PerlIO_stdout(),
3257 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3258 "maintained by Chris Nandor\n");
3261 PerlIO_printf(PerlIO_stdout(),
3262 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3265 PerlIO_printf(PerlIO_stdout(),
3266 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3267 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3272 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "atariST series port, ++jrb bammi@cadence.com\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "MiNT port by Guido Flohr, 1997-1999\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "EPOC port by Olaf Flebbe, 1999-2002\n");
3311 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3312 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3315 #ifdef __SYMBIAN32__
3316 PerlIO_printf(PerlIO_stdout(),
3317 "Symbian port by Nokia, 2004-2005\n");
3319 #ifdef BINARY_BUILD_NOTICE
3320 BINARY_BUILD_NOTICE;
3322 PerlIO_printf(PerlIO_stdout(),
3324 Perl may be copied only under the terms of either the Artistic License or the\n\
3325 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3326 Complete documentation for Perl, including FAQ lists, should be found on\n\
3327 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3328 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3331 if (! (PL_dowarn & G_WARN_ALL_MASK))
3332 PL_dowarn |= G_WARN_ON;
3336 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3337 if (!specialWARN(PL_compiling.cop_warnings))
3338 SvREFCNT_dec(PL_compiling.cop_warnings);
3339 PL_compiling.cop_warnings = pWARN_ALL ;
3343 PL_dowarn = G_WARN_ALL_OFF;
3344 if (!specialWARN(PL_compiling.cop_warnings))
3345 SvREFCNT_dec(PL_compiling.cop_warnings);
3346 PL_compiling.cop_warnings = pWARN_NONE ;
3351 if (s[1] == '-') /* Additional switches on #! line. */
3356 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3362 #ifdef ALTERNATE_SHEBANG
3363 case 'S': /* OS/2 needs -S on "extproc" line. */
3371 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3376 /* compliments of Tom Christiansen */
3378 /* unexec() can be found in the Gnu emacs distribution */
3379 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3382 Perl_my_unexec(pTHX)
3390 prog = newSVpv(BIN_EXP, 0);
3391 sv_catpvs(prog, "/perl");
3392 file = newSVpv(PL_origfilename, 0);
3393 sv_catpvs(file, ".perldump");
3395 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3396 /* unexec prints msg to stderr in case of failure */
3397 PerlProc_exit(status);
3400 # include <lib$routines.h>
3401 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3402 # elif defined(WIN32) || defined(__CYGWIN__)
3403 Perl_croak(aTHX_ "dump is not supported");
3405 ABORT(); /* for use with undump */
3410 /* initialize curinterp */
3416 # define PERLVAR(var,type)
3417 # define PERLVARA(var,n,type)
3418 # if defined(PERL_IMPLICIT_CONTEXT)
3419 # if defined(USE_5005THREADS)
3420 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3421 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3422 # else /* !USE_5005THREADS */
3423 # define PERLVARI(var,type,init) aTHX->var = init;
3424 # define PERLVARIC(var,type,init) aTHX->var = init;
3425 # endif /* USE_5005THREADS */
3427 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3428 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3430 # include "intrpvar.h"
3431 # ifndef USE_5005THREADS
3432 # include "thrdvar.h"
3439 # define PERLVAR(var,type)
3440 # define PERLVARA(var,n,type)
3441 # define PERLVARI(var,type,init) PL_##var = init;
3442 # define PERLVARIC(var,type,init) PL_##var = init;
3443 # include "intrpvar.h"
3444 # ifndef USE_5005THREADS
3445 # include "thrdvar.h"
3456 S_init_main_stash(pTHX)
3461 PL_curstash = PL_defstash = newHV();
3462 /* We know that the string "main" will be in the global shared string
3463 table, so it's a small saving to use it rather than allocate another
3465 PL_curstname = newSVpvs_share("main");
3466 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3467 /* If we hadn't caused another reference to "main" to be in the shared
3468 string table above, then it would be worth reordering these two,
3469 because otherwise all we do is delete "main" from it as a consequence
3470 of the SvREFCNT_dec, only to add it again with hv_name_set */
3471 SvREFCNT_dec(GvHV(gv));
3472 hv_name_set(PL_defstash, "main", 4, 0);
3473 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3475 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3477 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3478 GvMULTI_on(PL_incgv);
3479 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3480 GvMULTI_on(PL_hintgv);
3481 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3482 SvREFCNT_inc(PL_defgv);
3483 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3484 SvREFCNT_inc(PL_errgv);
3485 GvMULTI_on(PL_errgv);
3486 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3487 GvMULTI_on(PL_replgv);
3488 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3489 #ifdef PERL_DONT_CREATE_GVSV
3492 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3493 sv_setpvn(ERRSV, "", 0);
3494 PL_curstash = PL_defstash;
3495 CopSTASH_set(&PL_compiling, PL_defstash);
3496 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3497 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3499 /* We must init $/ before switches are processed. */
3500 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3503 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3505 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3511 const char *cpp_discard_flag;
3520 PL_origfilename = savepvs("-e");
3523 /* if find_script() returns, it returns a malloc()-ed value */
3524 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3526 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3527 const char *s = scriptname + 8;
3533 * Tell apart "normal" usage of fdscript, e.g.
3534 * with bash on FreeBSD:
3535 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3536 * from usage in suidperl.
3537 * Does any "normal" usage leave garbage after the number???
3538 * Is it a mistake to use a similar /dev/fd/ construct for
3543 * Be supersafe and do some sanity-checks.
3544 * Still, can we be sure we got the right thing?
3547 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3550 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3552 scriptname = savepv(s + 1);
3553 Safefree(PL_origfilename);
3554 PL_origfilename = (char *)scriptname;
3559 CopFILE_free(PL_curcop);
3560 CopFILE_set(PL_curcop, PL_origfilename);
3561 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3562 scriptname = (char *)"";
3563 if (fdscript >= 0) {
3564 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3565 # if defined(HAS_FCNTL) && defined(F_SETFD)
3567 /* ensure close-on-exec */
3568 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3573 Perl_croak(aTHX_ "sperl needs fd script\n"
3574 "You should not call sperl directly; do you need to "
3575 "change a #! line\nfrom sperl to perl?\n");
3578 * Do not open (or do other fancy stuff) while setuid.
3579 * Perl does the open, and hands script to suidperl on a fd;
3580 * suidperl only does some checks, sets up UIDs and re-execs
3581 * perl with that fd as it has always done.
3584 if (*suidscript != 1) {
3585 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3588 else if (PL_preprocess) {
3589 const char * const cpp_cfg = CPPSTDIN;
3590 SV * const cpp = newSVpvs("");
3591 SV * const cmd = newSV(0);
3593 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3594 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3595 if (strEQ(cpp_cfg, "cppstdin"))
3596 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3597 sv_catpv(cpp, cpp_cfg);
3600 sv_catpvs(sv, "-I");
3601 sv_catpv(sv,PRIVLIB_EXP);
3604 DEBUG_P(PerlIO_printf(Perl_debug_log,
3605 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3606 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3609 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3616 cpp_discard_flag = "";
3618 cpp_discard_flag = "-C";
3622 perl = os2_execname(aTHX);
3624 perl = PL_origargv[0];
3628 /* This strips off Perl comments which might interfere with
3629 the C pre-processor, including #!. #line directives are
3630 deliberately stripped to avoid confusion with Perl's version
3631 of #line. FWP played some golf with it so it will fit
3632 into VMS's 255 character buffer.
3635 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3637 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3639 Perl_sv_setpvf(aTHX_ cmd, "\
3640 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3641 perl, quote, code, quote, scriptname, cpp,
3642 cpp_discard_flag, sv, CPPMINUS);
3644 PL_doextract = FALSE;
3646 DEBUG_P(PerlIO_printf(Perl_debug_log,
3647 "PL_preprocess: cmd=\"%s\"\n",
3650 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3654 else if (!*scriptname) {
3655 forbid_setid(0, *suidscript);
3656 PL_rsfp = PerlIO_stdin();
3659 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3660 # if defined(HAS_FCNTL) && defined(F_SETFD)
3662 /* ensure close-on-exec */
3663 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3666 #endif /* IAMSUID */
3668 /* PSz 16 Sep 03 Keep neat error message */
3670 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3672 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3673 CopFILE(PL_curcop), Strerror(errno));
3679 * I_SYSSTATVFS HAS_FSTATVFS
3681 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3682 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3683 * here so that metaconfig picks them up. */
3687 S_fd_on_nosuid_fs(pTHX_ int fd)
3690 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3691 * but is needed also on machines without setreuid.
3692 * Seems safe enough to run as root.
3694 int check_okay = 0; /* able to do all the required sys/libcalls */
3695 int on_nosuid = 0; /* the fd is on a nosuid fs */
3697 * Need to check noexec also: nosuid might not be set, the average
3698 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3700 int on_noexec = 0; /* the fd is on a noexec fs */
3703 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3704 * fstatvfs() is UNIX98.
3705 * fstatfs() is 4.3 BSD.
3706 * ustat()+getmnt() is pre-4.3 BSD.
3707 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3708 * an irrelevant filesystem while trying to reach the right one.
3711 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3713 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3714 defined(HAS_FSTATVFS)
3715 # define FD_ON_NOSUID_CHECK_OKAY
3716 struct statvfs stfs;
3718 check_okay = fstatvfs(fd, &stfs) == 0;
3719 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3721 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3722 on platforms where it is present. */
3723 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3725 # endif /* fstatvfs */
3727 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3728 defined(PERL_MOUNT_NOSUID) && \
3729 defined(PERL_MOUNT_NOEXEC) && \
3730 defined(HAS_FSTATFS) && \
3731 defined(HAS_STRUCT_STATFS) && \
3732 defined(HAS_STRUCT_STATFS_F_FLAGS)
3733 # define FD_ON_NOSUID_CHECK_OKAY
3736 check_okay = fstatfs(fd, &stfs) == 0;
3737 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3738 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3739 # endif /* fstatfs */
3741 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3742 defined(PERL_MOUNT_NOSUID) && \
3743 defined(PERL_MOUNT_NOEXEC) && \
3744 defined(HAS_FSTAT) && \
3745 defined(HAS_USTAT) && \
3746 defined(HAS_GETMNT) && \
3747 defined(HAS_STRUCT_FS_DATA) && \
3749 # define FD_ON_NOSUID_CHECK_OKAY
3752 if (fstat(fd, &fdst) == 0) {
3754 if (ustat(fdst.st_dev, &us) == 0) {
3756 /* NOSTAT_ONE here because we're not examining fields which
3757 * vary between that case and STAT_ONE. */
3758 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3759 size_t cmplen = sizeof(us.f_fname);
3760 if (sizeof(fsd.fd_req.path) < cmplen)
3761 cmplen = sizeof(fsd.fd_req.path);
3762 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3763 fdst.st_dev == fsd.fd_req.dev) {
3765 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3766 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3771 # endif /* fstat+ustat+getmnt */
3773 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3774 defined(HAS_GETMNTENT) && \
3775 defined(HAS_HASMNTOPT) && \
3776 defined(MNTOPT_NOSUID) && \
3777 defined(MNTOPT_NOEXEC)
3778 # define FD_ON_NOSUID_CHECK_OKAY
3779 FILE *mtab = fopen("/etc/mtab", "r");
3780 struct mntent *entry;
3783 if (mtab && (fstat(fd, &stb) == 0)) {
3784 while (entry = getmntent(mtab)) {
3785 if (stat(entry->mnt_dir, &fsb) == 0
3786 && fsb.st_dev == stb.st_dev)
3788 /* found the filesystem */
3790 if (hasmntopt(entry, MNTOPT_NOSUID))
3792 if (hasmntopt(entry, MNTOPT_NOEXEC))
3795 } /* A single fs may well fail its stat(). */
3800 # endif /* getmntent+hasmntopt */
3803 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3805 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3807 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3808 return ((!check_okay) || on_nosuid || on_noexec);
3810 #endif /* IAMSUID */
3813 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3814 int fdscript, int suidscript)
3819 #endif /* IAMSUID */
3821 /* do we need to emulate setuid on scripts? */
3823 /* This code is for those BSD systems that have setuid #! scripts disabled
3824 * in the kernel because of a security problem. Merely defining DOSUID
3825 * in perl will not fix that problem, but if you have disabled setuid
3826 * scripts in the kernel, this will attempt to emulate setuid and setgid
3827 * on scripts that have those now-otherwise-useless bits set. The setuid
3828 * root version must be called suidperl or sperlN.NNN. If regular perl
3829 * discovers that it has opened a setuid script, it calls suidperl with
3830 * the same argv that it had. If suidperl finds that the script it has
3831 * just opened is NOT setuid root, it sets the effective uid back to the
3832 * uid. We don't just make perl setuid root because that loses the
3833 * effective uid we had before invoking perl, if it was different from the
3836 * Description/comments above do not match current workings:
3837 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3838 * suidperl called with script open and name changed to /dev/fd/N/X;
3839 * suidperl croaks if script is not setuid;
3840 * making perl setuid would be a huge security risk (and yes, that
3841 * would lose any euid we might have had).
3843 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3844 * be defined in suidperl only. suidperl must be setuid root. The
3845 * Configure script will set this up for you if you want it.
3851 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3852 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3853 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3855 const char *linestr;
3859 if (fdscript < 0 || suidscript != 1)
3860 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3862 * Since the script is opened by perl, not suidperl, some of these
3863 * checks are superfluous. Leaving them in probably does not lower
3867 * Do checks even for systems with no HAS_SETREUID.
3868 * We used to swap, then re-swap UIDs with
3870 if (setreuid(PL_euid,PL_uid) < 0
3871 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3872 Perl_croak(aTHX_ "Can't swap uid and euid");
3875 if (setreuid(PL_uid,PL_euid) < 0
3876 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3877 Perl_croak(aTHX_ "Can't reswap uid and euid");
3881 /* On this access check to make sure the directories are readable,
3882 * there is actually a small window that the user could use to make
3883 * filename point to an accessible directory. So there is a faint
3884 * chance that someone could execute a setuid script down in a
3885 * non-accessible directory. I don't know what to do about that.
3886 * But I don't think it's too important. The manual lies when
3887 * it says access() is useful in setuid programs.
3889 * So, access() is pretty useless... but not harmful... do anyway.
3891 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3892 Perl_croak(aTHX_ "Can't access() script\n");
3895 /* If we can swap euid and uid, then we can determine access rights
3896 * with a simple stat of the file, and then compare device and
3897 * inode to make sure we did stat() on the same file we opened.
3898 * Then we just have to make sure he or she can execute it.
3901 * As the script is opened by perl, not suidperl, we do not need to
3902 * care much about access rights.
3904 * The 'script changed' check is needed, or we can get lied to
3905 * about $0 with e.g.
3906 * suidperl /dev/fd/4//bin/x 4<setuidscript
3907 * Without HAS_SETREUID, is it safe to stat() as root?
3909 * Are there any operating systems that pass /dev/fd/xxx for setuid
3910 * scripts, as suggested/described in perlsec(1)? Surely they do not
3911 * pass the script name as we do, so the "script changed" test would
3912 * fail for them... but we never get here with
3913 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3915 * This is one place where we must "lie" about return status: not
3916 * say if the stat() failed. We are doing this as root, and could
3917 * be tricked into reporting existence or not of files that the
3918 * "plain" user cannot even see.
3922 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3923 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3924 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3925 Perl_croak(aTHX_ "Setuid script changed\n");
3929 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3930 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3933 * We used to do this check as the "plain" user (after swapping
3934 * UIDs). But the check for nosuid and noexec filesystem is needed,
3935 * and should be done even without HAS_SETREUID. (Maybe those
3936 * operating systems do not have such mount options anyway...)
3937 * Seems safe enough to do as root.
3939 #if !defined(NO_NOSUID_CHECK)
3940 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3941 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3944 #endif /* IAMSUID */
3946 if (!S_ISREG(PL_statbuf.st_mode)) {
3947 Perl_croak(aTHX_ "Setuid script not plain file\n");
3949 if (PL_statbuf.st_mode & S_IWOTH)
3950 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3951 PL_doswitches = FALSE; /* -s is insecure in suid */
3952 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3953 CopLINE_inc(PL_curcop);
3954 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3955 Perl_croak(aTHX_ "No #! line");
3956 linestr = SvPV_nolen_const(PL_linestr);
3957 /* required even on Sys V */
3958 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3959 Perl_croak(aTHX_ "No #! line");
3963 /* Sanity check on line length */
3964 s_end = s + strlen(s);
3965 if (s_end == s || (s_end - s) > 4000)
3966 Perl_croak(aTHX_ "Very long #! line");
3967 /* Allow more than a single space after #! */
3968 while (isSPACE(*s)) s++;
3969 /* Sanity check on buffer end */
3970 while ((*s) && !isSPACE(*s)) s++;
3971 for (s2 = s; (s2 > linestr &&
3972 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3973 || s2[-1] == '-')); s2--) ;
3974 /* Sanity check on buffer start */
3975 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3976 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3977 Perl_croak(aTHX_ "Not a perl script");
3978 while (*s == ' ' || *s == '\t') s++;
3980 * #! arg must be what we saw above. They can invoke it by
3981 * mentioning suidperl explicitly, but they may not add any strange
3982 * arguments beyond what #! says if they do invoke suidperl that way.
3985 * The way validarg was set up, we rely on the kernel to start
3986 * scripts with argv[1] set to contain all #! line switches (the
3990 * Check that we got all the arguments listed in the #! line (not
3991 * just that there are no extraneous arguments). Might not matter
3992 * much, as switches from #! line seem to be acted upon (also), and
3993 * so may be checked and trapped in perl. But, security checks must
3994 * be done in suidperl and not deferred to perl. Note that suidperl
3995 * does not get around to parsing (and checking) the switches on
3996 * the #! line (but execs perl sooner).
3997 * Allow (require) a trailing newline (which may be of two
3998 * characters on some architectures?) (but no other trailing
4001 len = strlen(validarg);
4002 if (strEQ(validarg," PHOOEY ") ||
4003 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4004 !((s_end - s) == len+1
4005 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4006 Perl_croak(aTHX_ "Args must match #! line");
4010 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4011 PL_euid == PL_statbuf.st_uid)
4013 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4014 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4015 #endif /* IAMSUID */
4018 PL_euid) { /* oops, we're not the setuid root perl */
4020 * When root runs a setuid script, we do not go through the same
4021 * steps of execing sperl and then perl with fd scripts, but
4022 * simply set up UIDs within the same perl invocation; so do
4023 * not have the same checks (on options, whatever) that we have
4024 * for plain users. No problem really: would have to be a script
4025 * that does not actually work for plain users; and if root is
4026 * foolish and can be persuaded to run such an unsafe script, he
4027 * might run also non-setuid ones, and deserves what he gets.
4029 * Or, we might drop the PL_euid check above (and rely just on
4030 * fdscript to avoid loops), and do the execs
4036 * Pass fd script to suidperl.
4037 * Exec suidperl, substituting fd script for scriptname.
4038 * Pass script name as "subdir" of fd, which perl will grok;
4039 * in fact will use that to distinguish this from "normal"
4040 * usage, see comments above.
4042 PerlIO_rewind(PL_rsfp);
4043 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4044 /* PSz 27 Feb 04 Sanity checks on scriptname */
4045 if ((!scriptname) || (!*scriptname) ) {
4046 Perl_croak(aTHX_ "No setuid script name\n");
4048 if (*scriptname == '-') {
4049 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4050 /* Or we might confuse it with an option when replacing
4051 * name in argument list, below (though we do pointer, not
4052 * string, comparisons).
4055 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4056 if (!PL_origargv[which]) {
4057 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4059 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4060 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4061 #if defined(HAS_FCNTL) && defined(F_SETFD)
4062 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4065 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4066 (int)PERL_REVISION, (int)PERL_VERSION,
4067 (int)PERL_SUBVERSION), PL_origargv);
4069 #endif /* IAMSUID */
4070 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4073 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4075 * This seems back to front: we try HAS_SETEGID first; if not available
4076 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4077 * in the sense that we only want to set EGID; but are there any machines
4078 * with either of the latter, but not the former? Same with UID, later.
4081 (void)setegid(PL_statbuf.st_gid);
4084 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4086 #ifdef HAS_SETRESGID
4087 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4089 PerlProc_setgid(PL_statbuf.st_gid);
4093 if (PerlProc_getegid() != PL_statbuf.st_gid)
4094 Perl_croak(aTHX_ "Can't do setegid!\n");
4096 if (PL_statbuf.st_mode & S_ISUID) {
4097 if (PL_statbuf.st_uid != PL_euid)
4099 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4102 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4104 #ifdef HAS_SETRESUID
4105 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4107 PerlProc_setuid(PL_statbuf.st_uid);
4111 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4112 Perl_croak(aTHX_ "Can't do seteuid!\n");
4114 else if (PL_uid) { /* oops, mustn't run as root */
4116 (void)seteuid((Uid_t)PL_uid);
4119 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4121 #ifdef HAS_SETRESUID
4122 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4124 PerlProc_setuid((Uid_t)PL_uid);
4128 if (PerlProc_geteuid() != PL_uid)
4129 Perl_croak(aTHX_ "Can't do seteuid!\n");
4132 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4133 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4136 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4137 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4138 else if (fdscript < 0 || suidscript != 1)
4139 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4140 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4142 /* PSz 16 Sep 03 Keep neat error message */
4143 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4146 /* We absolutely must clear out any saved ids here, so we */
4147 /* exec the real perl, substituting fd script for scriptname. */
4148 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4150 * It might be thought that using setresgid and/or setresuid (changed to
4151 * set the saved IDs) above might obviate the need to exec, and we could
4152 * go on to "do the perl thing".
4154 * Is there such a thing as "saved GID", and is that set for setuid (but
4155 * not setgid) execution like suidperl? Without exec, it would not be
4156 * cleared for setuid (but not setgid) scripts (or might need a dummy
4159 * We need suidperl to do the exact same argument checking that perl
4160 * does. Thus it cannot be very small; while it could be significantly
4161 * smaller, it is safer (simpler?) to make it essentially the same
4162 * binary as perl (but they are not identical). - Maybe could defer that
4163 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4164 * but prefer to do thorough checks in suidperl itself. Such deferral
4165 * would make suidperl security rely on perl, a design no-no.
4167 * Setuid things should be short and simple, thus easy to understand and
4168 * verify. They should do their "own thing", without influence by
4169 * attackers. It may help if their internal execution flow is fixed,
4170 * regardless of platform: it may be best to exec anyway.
4172 * Suidperl should at least be conceptually simple: a wrapper only,
4173 * never to do any real perl. Maybe we should put
4175 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4177 * into the perly bits.
4179 PerlIO_rewind(PL_rsfp);
4180 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4182 * Keep original arguments: suidperl already has fd script.
4184 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4185 /* if (!PL_origargv[which]) { */
4186 /* errno = EPERM; */
4187 /* Perl_croak(aTHX_ "Permission denied\n"); */
4189 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4190 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4191 #if defined(HAS_FCNTL) && defined(F_SETFD)
4192 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4195 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4196 (int)PERL_REVISION, (int)PERL_VERSION,
4197 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4199 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4200 #endif /* IAMSUID */
4202 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4203 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4204 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4205 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4207 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4210 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4211 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4212 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4213 /* not set-id, must be wrapped */
4221 S_find_beginning(pTHX_ const int suidscript)
4225 register const char *s2;
4226 #ifdef MACOS_TRADITIONAL
4230 /* skip forward in input to the real script? */
4232 forbid_setid('x', suidscript);
4233 #ifdef MACOS_TRADITIONAL
4234 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4236 while (PL_doextract || gMacPerl_AlwaysExtract) {
4237 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4238 if (!gMacPerl_AlwaysExtract)
4239 Perl_croak(aTHX_ "No Perl script found in input\n");
4241 if (PL_doextract) /* require explicit override ? */
4242 if (!OverrideExtract(PL_origfilename))
4243 Perl_croak(aTHX_ "User aborted script\n");
4245 PL_doextract = FALSE;
4247 /* Pater peccavi, file does not have #! */
4248 PerlIO_rewind(PL_rsfp);
4253 while (PL_doextract) {
4254 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4255 Perl_croak(aTHX_ "No Perl script found in input\n");
4258 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4259 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4260 PL_doextract = FALSE;
4261 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4263 while (*s == ' ' || *s == '\t') s++;
4265 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4266 || s2[-1] == '_') s2--;
4267 if (strnEQ(s2-4,"perl",4))
4268 while ((s = moreswitches(s, -1)))
4271 #ifdef MACOS_TRADITIONAL
4272 /* We are always searching for the #!perl line in MacPerl,
4273 * so if we find it, still keep the line count correct
4274 * by counting lines we already skipped over
4276 for (; maclines > 0 ; maclines--)
4277 PerlIO_ungetc(PL_rsfp, '\n');
4281 /* gMacPerl_AlwaysExtract is false in MPW tool */
4282 } else if (gMacPerl_AlwaysExtract) {
4294 PL_uid = PerlProc_getuid();
4295 PL_euid = PerlProc_geteuid();
4296 PL_gid = PerlProc_getgid();
4297 PL_egid = PerlProc_getegid();
4299 PL_uid |= PL_gid << 16;
4300 PL_euid |= PL_egid << 16;
4302 /* Should not happen: */
4303 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4304 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4307 * Should go by suidscript, not uid!=euid: why disallow
4308 * system("ls") in scripts run from setuid things?
4309 * Or, is this run before we check arguments and set suidscript?
4310 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4311 * (We never have suidscript, can we be sure to have fdscript?)
4312 * Or must then go by UID checks? See comments in forbid_setid also.
4316 /* This is used very early in the lifetime of the program,
4317 * before even the options are parsed, so PL_tainting has
4318 * not been initialized properly. */
4320 Perl_doing_taint(int argc, char *argv[], char *envp[])
4322 #ifndef PERL_IMPLICIT_SYS
4323 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4324 * before we have an interpreter-- and the whole point of this
4325 * function is to be called at such an early stage. If you are on
4326 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4327 * "tainted because running with altered effective ids', you'll
4328 * have to add your own checks somewhere in here. The two most
4329 * known samples of 'implicitness' are Win32 and NetWare, neither
4330 * of which has much of concept of 'uids'. */
4331 int uid = PerlProc_getuid();
4332 int euid = PerlProc_geteuid();
4333 int gid = PerlProc_getgid();
4334 int egid = PerlProc_getegid();
4341 if (uid && (euid != uid || egid != gid))
4343 #endif /* !PERL_IMPLICIT_SYS */
4344 /* This is a really primitive check; environment gets ignored only
4345 * if -T are the first chars together; otherwise one gets
4346 * "Too late" message. */
4347 if ( argc > 1 && argv[1][0] == '-'
4348 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4353 /* Passing the flag as a single char rather than a string is a slight space
4354 optimisation. The only message that isn't /^-.$/ is
4355 "program input from stdin", which is substituted in place of '\0', which
4356 could never be a command line flag. */
4358 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4361 char string[3] = "-x";
4362 const char *message = "program input from stdin";
4369 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4370 if (PL_euid != PL_uid)
4371 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4372 if (PL_egid != PL_gid)
4373 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4374 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4376 * Checks for UID/GID above "wrong": why disallow
4377 * perl -e 'print "Hello\n"'
4378 * from within setuid things?? Simply drop them: replaced by
4379 * fdscript/suidscript and #ifdef IAMSUID checks below.
4381 * This may be too late for command-line switches. Will catch those on
4382 * the #! line, after finding the script name and setting up
4383 * fdscript/suidscript. Note that suidperl does not get around to
4384 * parsing (and checking) the switches on the #! line, but checks that
4385 * the two sets are identical.
4387 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4388 * instead, or would that be "too late"? (We never have suidscript, can
4389 * we be sure to have fdscript?)
4391 * Catch things with suidscript (in descendant of suidperl), even with
4392 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4393 * below; but I am paranoid.
4395 * Also see comments about root running a setuid script, elsewhere.
4397 if (suidscript >= 0)
4398 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4400 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4401 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4402 #endif /* IAMSUID */
4406 Perl_init_debugger(pTHX)
4409 HV * const ostash = PL_curstash;
4411 PL_curstash = PL_debstash;
4412 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4414 AvREAL_off(PL_dbargs);
4415 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4416 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4417 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4418 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4419 sv_setiv(PL_DBsingle, 0);
4420 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4421 sv_setiv(PL_DBtrace, 0);
4422 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4423 sv_setiv(PL_DBsignal, 0);
4424 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4425 sv_setiv(PL_DBassertion, 0);
4426 PL_curstash = ostash;
4429 #ifndef STRESS_REALLOC
4430 #define REASONABLE(size) (size)
4432 #define REASONABLE(size) (1) /* unreasonable */
4436 Perl_init_stacks(pTHX)
4439 /* start with 128-item stack and 8K cxstack */
4440 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4441 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4442 PL_curstackinfo->si_type = PERLSI_MAIN;
4443 PL_curstack = PL_curstackinfo->si_stack;
4444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4446 PL_stack_base = AvARRAY(PL_curstack);
4447 PL_stack_sp = PL_stack_base;
4448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4450 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4453 PL_tmps_max = REASONABLE(128);
4455 Newx(PL_markstack,REASONABLE(32),I32);
4456 PL_markstack_ptr = PL_markstack;
4457 PL_markstack_max = PL_markstack + REASONABLE(32);
4461 Newx(PL_scopestack,REASONABLE(32),I32);
4462 PL_scopestack_ix = 0;
4463 PL_scopestack_max = REASONABLE(32);
4465 Newx(PL_savestack,REASONABLE(128),ANY);
4466 PL_savestack_ix = 0;
4467 PL_savestack_max = REASONABLE(128);
4476 while (PL_curstackinfo->si_next)
4477 PL_curstackinfo = PL_curstackinfo->si_next;
4478 while (PL_curstackinfo) {
4479 PERL_SI *p = PL_curstackinfo->si_prev;
4480 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4481 Safefree(PL_curstackinfo->si_cxstack);
4482 Safefree(PL_curstackinfo);
4483 PL_curstackinfo = p;
4485 Safefree(PL_tmps_stack);
4486 Safefree(PL_markstack);
4487 Safefree(PL_scopestack);
4488 Safefree(PL_savestack);
4498 lex_start(PL_linestr);
4500 PL_subname = newSVpvs("main");
4504 S_init_predump_symbols(pTHX)
4510 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4511 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4512 GvMULTI_on(PL_stdingv);
4513 io = GvIOp(PL_stdingv);
4514 IoTYPE(io) = IoTYPE_RDONLY;
4515 IoIFP(io) = PerlIO_stdin();
4516 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4518 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4520 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4523 IoTYPE(io) = IoTYPE_WRONLY;
4524 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4526 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4528 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4530 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4531 GvMULTI_on(PL_stderrgv);
4532 io = GvIOp(PL_stderrgv);
4533 IoTYPE(io) = IoTYPE_WRONLY;
4534 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4535 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4537 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4539 PL_statname = newSV(0); /* last filename we did stat on */
4541 Safefree(PL_osname);
4542 PL_osname = savepv(OSNAME);
4546 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4549 argc--,argv++; /* skip name of script */
4550 if (PL_doswitches) {
4551 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4555 if (argv[0][1] == '-' && !argv[0][2]) {
4559 if ((s = strchr(argv[0], '='))) {
4560 const char *const start_name = argv[0] + 1;
4561 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4562 TRUE, SVt_PV)), s + 1);
4565 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4568 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4569 GvMULTI_on(PL_argvgv);
4570 (void)gv_AVadd(PL_argvgv);
4571 av_clear(GvAVn(PL_argvgv));
4572 for (; argc > 0; argc--,argv++) {
4573 SV * const sv = newSVpv(argv[0],0);
4574 av_push(GvAVn(PL_argvgv),sv);
4575 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4576 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4579 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4580 (void)sv_utf8_decode(sv);
4586 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4591 PL_toptarget = newSV(0);
4592 sv_upgrade(PL_toptarget, SVt_PVFM);
4593 sv_setpvn(PL_toptarget, "", 0);
4594 PL_bodytarget = newSV(0);
4595 sv_upgrade(PL_bodytarget, SVt_PVFM);
4596 sv_setpvn(PL_bodytarget, "", 0);
4597 PL_formtarget = PL_bodytarget;
4601 init_argv_symbols(argc,argv);
4603 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4604 #ifdef MACOS_TRADITIONAL
4605 /* $0 is not majick on a Mac */
4606 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4608 sv_setpv(GvSV(tmpgv),PL_origfilename);
4609 magicname("0", "0", 1);
4612 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4614 GvMULTI_on(PL_envgv);
4615 hv = GvHVn(PL_envgv);
4616 hv_magic(hv, NULL, PERL_MAGIC_env);
4618 #ifdef USE_ENVIRON_ARRAY
4619 /* Note that if the supplied env parameter is actually a copy
4620 of the global environ then it may now point to free'd memory
4621 if the environment has been modified since. To avoid this
4622 problem we treat env==NULL as meaning 'use the default'
4627 # ifdef USE_ITHREADS
4628 && PL_curinterp == aTHX
4635 char** origenv = environ;
4638 for (; *env; env++) {
4639 if (!(s = strchr(*env,'=')) || s == *env)
4641 #if defined(MSDOS) && !defined(DJGPP)
4646 sv = newSVpv(s+1, 0);
4647 (void)hv_store(hv, *env, s - *env, sv, 0);
4650 if (origenv != environ) {
4651 /* realloc has shifted us */
4652 env = (env - origenv) + environ;
4657 #endif /* USE_ENVIRON_ARRAY */
4658 #endif /* !PERL_MICRO */
4661 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4662 SvREADONLY_off(GvSV(tmpgv));
4663 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4664 SvREADONLY_on(GvSV(tmpgv));
4666 #ifdef THREADS_HAVE_PIDS
4667 PL_ppid = (IV)getppid();
4670 /* touch @F array to prevent spurious warnings 20020415 MJD */
4672 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4674 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4675 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4676 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4680 S_init_perllib(pTHX)
4686 s = PerlEnv_getenv("PERL5LIB");
4688 * It isn't possible to delete an environment variable with
4689 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4690 * case we treat PERL5LIB as undefined if it has a zero-length value.
4692 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4693 if (s && *s != '\0')
4697 incpush(s, TRUE, TRUE, TRUE, FALSE);
4699 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4701 /* Treat PERL5?LIB as a possible search list logical name -- the
4702 * "natural" VMS idiom for a Unix path string. We allow each
4703 * element to be a set of |-separated directories for compatibility.
4707 if (my_trnlnm("PERL5LIB",buf,0))
4708 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4710 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4714 /* Use the ~-expanded versions of APPLLIB (undocumented),
4715 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4718 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4722 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4724 #ifdef MACOS_TRADITIONAL
4727 SV * privdir = newSV(0);
4728 char * macperl = PerlEnv_getenv("MACPERL");
4733 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4734 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4735 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4736 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4737 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4738 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4740 SvREFCNT_dec(privdir);
4743 incpush(":", FALSE, FALSE, TRUE, FALSE);
4746 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4749 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4751 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4755 /* sitearch is always relative to sitelib on Windows for
4756 * DLL-based path intuition to work correctly */
4757 # if !defined(WIN32)
4758 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4764 /* this picks up sitearch as well */
4765 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4767 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4771 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4772 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4775 #ifdef PERL_VENDORARCH_EXP
4776 /* vendorarch is always relative to vendorlib on Windows for
4777 * DLL-based path intuition to work correctly */
4778 # if !defined(WIN32)
4779 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4783 #ifdef PERL_VENDORLIB_EXP
4785 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4787 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4791 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4792 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4795 #ifdef PERL_OTHERLIBDIRS
4796 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4800 incpush(".", FALSE, FALSE, TRUE, FALSE);
4801 #endif /* MACOS_TRADITIONAL */
4804 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4805 # define PERLLIB_SEP ';'
4808 # define PERLLIB_SEP '|'
4810 # if defined(MACOS_TRADITIONAL)
4811 # define PERLLIB_SEP ','
4813 # define PERLLIB_SEP ':'
4817 #ifndef PERLLIB_MANGLE
4818 # define PERLLIB_MANGLE(s,n) (s)
4821 /* Push a directory onto @INC if it exists.
4822 Generate a new SV if we do this, to save needing to copy the SV we push
4825 S_incpush_if_exists(pTHX_ SV *dir)
4829 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4830 S_ISDIR(tmpstatbuf.st_mode)) {
4831 av_push(GvAVn(PL_incgv), dir);
4838 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4843 const char *p = dir;
4848 if (addsubdirs || addoldvers) {
4852 /* Break at all separators */
4854 SV *libdir = newSV(0);
4857 /* skip any consecutive separators */
4859 while ( *p == PERLLIB_SEP ) {
4860 /* Uncomment the next line for PATH semantics */
4861 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4866 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4867 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4872 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4873 p = NULL; /* break out */
4875 #ifdef MACOS_TRADITIONAL
4876 if (!strchr(SvPVX(libdir), ':')) {
4879 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4881 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4882 sv_catpvs(libdir, ":");
4885 /* Do the if() outside the #ifdef to avoid warnings about an unused
4888 #ifdef PERL_RELOCATABLE_INC
4890 * Relocatable include entries are marked with a leading .../
4893 * 0: Remove that leading ".../"
4894 * 1: Remove trailing executable name (anything after the last '/')
4895 * from the perl path to give a perl prefix
4897 * While the @INC element starts "../" and the prefix ends with a real
4898 * directory (ie not . or ..) chop that real directory off the prefix
4899 * and the leading "../" from the @INC element. ie a logical "../"
4901 * Finally concatenate the prefix and the remainder of the @INC element
4902 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4903 * generates /usr/local/lib/perl5
4905 const char *libpath = SvPVX(libdir);
4906 STRLEN libpath_len = SvCUR(libdir);
4907 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4909 SV * const caret_X = get_sv("\030", 0);
4910 /* Going to use the SV just as a scratch buffer holding a C
4916 /* $^X is *the* source of taint if tainting is on, hence
4917 SvPOK() won't be true. */
4919 assert(SvPOKp(caret_X));
4920 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4921 /* Firstly take off the leading .../
4922 If all else fail we'll do the paths relative to the current
4924 sv_chop(libdir, libpath + 4);
4925 /* Don't use SvPV as we're intentionally bypassing taining,
4926 mortal copies that the mg_get of tainting creates, and
4927 corruption that seems to come via the save stack.
4928 I guess that the save stack isn't correctly set up yet. */
4929 libpath = SvPVX(libdir);
4930 libpath_len = SvCUR(libdir);
4932 /* This would work more efficiently with memrchr, but as it's
4933 only a GNU extension we'd need to probe for it and
4934 implement our own. Not hard, but maybe not worth it? */
4936 prefix = SvPVX(prefix_sv);
4937 lastslash = strrchr(prefix, '/');
4939 /* First time in with the *lastslash = '\0' we just wipe off
4940 the trailing /perl from (say) /usr/foo/bin/perl
4944 while ((*lastslash = '\0'), /* Do that, come what may. */
4945 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4946 && (lastslash = strrchr(prefix, '/')))) {
4947 if (lastslash[1] == '\0'
4948 || (lastslash[1] == '.'
4949 && (lastslash[2] == '/' /* ends "/." */
4950 || (lastslash[2] == '/'
4951 && lastslash[3] == '/' /* or "/.." */
4953 /* Prefix ends "/" or "/." or "/..", any of which
4954 are fishy, so don't do any more logical cleanup.
4958 /* Remove leading "../" from path */
4961 /* Next iteration round the loop removes the last
4962 directory name from prefix by writing a '\0' in
4963 the while clause. */
4965 /* prefix has been terminated with a '\0' to the correct
4966 length. libpath points somewhere into the libdir SV.
4967 We need to join the 2 with '/' and drop the result into
4969 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4970 SvREFCNT_dec(libdir);
4971 /* And this is the new libdir. */
4974 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4975 /* Need to taint reloccated paths if running set ID */
4976 SvTAINTED_on(libdir);
4979 SvREFCNT_dec(prefix_sv);
4984 * BEFORE pushing libdir onto @INC we may first push version- and
4985 * archname-specific sub-directories.
4987 if (addsubdirs || addoldvers) {
4988 #ifdef PERL_INC_VERSION_LIST
4989 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4990 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4991 const char * const *incver;
4997 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4999 while (unix[len-1] == '/') len--; /* Cosmetic */
5000 sv_usepvn(libdir,unix,len);
5003 PerlIO_printf(Perl_error_log,
5004 "Failed to unixify @INC element \"%s\"\n",
5008 #ifdef MACOS_TRADITIONAL
5009 #define PERL_AV_SUFFIX_FMT ""
5010 #define PERL_ARCH_FMT "%s:"
5011 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5013 #define PERL_AV_SUFFIX_FMT "/"
5014 #define PERL_ARCH_FMT "/%s"
5015 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5017 /* .../version/archname if -d .../version/archname */
5018 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5020 (int)PERL_REVISION, (int)PERL_VERSION,
5021 (int)PERL_SUBVERSION, ARCHNAME);
5022 subdir = S_incpush_if_exists(aTHX_ subdir);
5024 /* .../version if -d .../version */
5025 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5026 (int)PERL_REVISION, (int)PERL_VERSION,
5027 (int)PERL_SUBVERSION);
5028 subdir = S_incpush_if_exists(aTHX_ subdir);
5030 /* .../archname if -d .../archname */
5031 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5032 subdir = S_incpush_if_exists(aTHX_ subdir);
5036 #ifdef PERL_INC_VERSION_LIST
5038 for (incver = incverlist; *incver; incver++) {
5039 /* .../xxx if -d .../xxx */
5040 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5041 subdir = S_incpush_if_exists(aTHX_ subdir);
5047 /* finally push this lib directory on the end of @INC */
5048 av_push(GvAVn(PL_incgv), libdir);
5051 assert (SvREFCNT(subdir) == 1);
5052 SvREFCNT_dec(subdir);
5056 #ifdef USE_5005THREADS
5057 STATIC struct perl_thread *
5058 S_init_main_thread(pTHX)
5060 #if !defined(PERL_IMPLICIT_CONTEXT)
5061 struct perl_thread *thr;
5065 Newxz(thr, 1, struct perl_thread);
5066 PL_curcop = &PL_compiling;
5067 thr->interp = PERL_GET_INTERP;
5068 thr->cvcache = newHV();
5069 thr->threadsv = newAV();
5070 /* thr->threadsvp is set when find_threadsv is called */
5071 thr->specific = newAV();
5072 thr->flags = THRf_R_JOINABLE;
5073 MUTEX_INIT(&thr->mutex);
5074 /* Handcraft thrsv similarly to mess_sv */
5075 Newx(PL_thrsv, 1, SV);
5077 SvFLAGS(PL_thrsv) = SVt_PV;
5078 SvANY(PL_thrsv) = (void*)xpv;
5079 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5080 SvPV_set(PL_thrsvr, (char*)thr);
5081 SvCUR_set(PL_thrsv, sizeof(thr));
5082 SvLEN_set(PL_thrsv, sizeof(thr));
5083 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5084 thr->oursv = PL_thrsv;
5085 PL_chopset = " \n-";
5088 MUTEX_LOCK(&PL_threads_mutex);
5094 MUTEX_UNLOCK(&PL_threads_mutex);
5096 #ifdef HAVE_THREAD_INTERN
5097 Perl_init_thread_intern(thr);
5100 #ifdef SET_THREAD_SELF
5101 SET_THREAD_SELF(thr);
5103 thr->self = pthread_self();
5104 #endif /* SET_THREAD_SELF */
5108 * These must come after the thread self setting
5109 * because sv_setpvn does SvTAINT and the taint
5110 * fields thread selfness being set.
5112 PL_toptarget = newSV(0);
5113 sv_upgrade(PL_toptarget, SVt_PVFM);
5114 sv_setpvn(PL_toptarget, "", 0);
5115 PL_bodytarget = newSV(0);
5116 sv_upgrade(PL_bodytarget, SVt_PVFM);
5117 sv_setpvn(PL_bodytarget, "", 0);
5118 PL_formtarget = PL_bodytarget;
5119 thr->errsv = newSVpvs("");
5120 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5123 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5124 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5125 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5126 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5127 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5128 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5130 PL_reginterp_cnt = 0;
5134 #endif /* USE_5005THREADS */
5137 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5141 const line_t oldline = CopLINE(PL_curcop);
5147 while (av_len(paramList) >= 0) {
5148 cv = (CV*)av_shift(paramList);
5150 if (paramList == PL_beginav) {
5151 /* save PL_beginav for compiler */
5152 if (! PL_beginav_save)
5153 PL_beginav_save = newAV();
5154 av_push(PL_beginav_save, (SV*)cv);
5156 else if (paramList == PL_checkav) {
5157 /* save PL_checkav for compiler */
5158 if (! PL_checkav_save)
5159 PL_checkav_save = newAV();
5160 av_push(PL_checkav_save, (SV*)cv);
5170 (void)SvPV_const(atsv, len);
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5174 if (paramList == PL_beginav)
5175 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5177 Perl_sv_catpvf(aTHX_ atsv,
5178 "%s failed--call queue aborted",
5179 paramList == PL_checkav ? "CHECK"
5180 : paramList == PL_initav ? "INIT"
5182 while (PL_scopestack_ix > oldscope)
5185 Perl_croak(aTHX_ "%"SVf"", atsv);
5192 /* my_exit() was called */
5193 while (PL_scopestack_ix > oldscope)
5196 PL_curstash = PL_defstash;
5197 PL_curcop = &PL_compiling;
5198 CopLINE_set(PL_curcop, oldline);
5200 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5201 if (paramList == PL_beginav)
5202 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5204 Perl_croak(aTHX_ "%s failed--call queue aborted",
5205 paramList == PL_checkav ? "CHECK"
5206 : paramList == PL_initav ? "INIT"
5213 PL_curcop = &PL_compiling;
5214 CopLINE_set(PL_curcop, oldline);
5217 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5226 S_call_list_body(pTHX_ CV *cv)
5229 PUSHMARK(PL_stack_sp);
5230 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5235 Perl_my_exit(pTHX_ U32 status)
5238 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5239 thr, (unsigned long) status));
5248 STATUS_EXIT_SET(status);
5255 Perl_my_failure_exit(pTHX)
5259 /* We have been called to fall on our sword. The desired exit code
5260 * should be already set in STATUS_UNIX, but could be shifted over
5261 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5264 * If an error code has not been set, then force the issue.
5266 if (MY_POSIX_EXIT) {
5268 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5269 * the exit code when there isn't an error.
5272 if (STATUS_UNIX == 0)
5273 STATUS_UNIX_EXIT_SET(255);
5275 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5277 /* The exit code could have been set by $? or vmsish which
5278 * means that it may not be fatal. So convert
5279 * success/warning codes to fatal.
5281 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5282 STATUS_UNIX_EXIT_SET(255);
5286 /* Traditionally Perl on VMS always expects a Fatal Error. */
5287 if (vaxc$errno & 1) {
5289 /* So force success status to failure */
5290 if (STATUS_NATIVE & 1)
5295 STATUS_UNIX = EINTR; /* In case something cares */
5300 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5302 /* Encode the severity code */
5303 severity = STATUS_NATIVE & STS$M_SEVERITY;
5304 STATUS_UNIX = (severity ? severity : 1) << 8;
5306 /* Perl expects this to be a fatal error */
5307 if (severity != STS$K_SEVERE)
5316 STATUS_UNIX_SET(errno);
5318 exitstatus = STATUS_UNIX >> 8;
5319 if (exitstatus & 255)
5320 STATUS_UNIX_SET(exitstatus);
5322 STATUS_UNIX_SET(255);
5329 S_my_exit_jump(pTHX)
5332 register PERL_CONTEXT *cx;
5337 SvREFCNT_dec(PL_e_script);
5341 POPSTACK_TO(PL_mainstack);
5342 if (cxstack_ix >= 0) {
5345 POPBLOCK(cx,PL_curpm);
5350 PERL_UNUSED_VAR(gimme);
5351 PERL_UNUSED_VAR(newsp);
5355 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5358 const char * const p = SvPVX_const(PL_e_script);
5359 const char *nl = strchr(p, '\n');
5361 PERL_UNUSED_ARG(idx);
5362 PERL_UNUSED_ARG(maxlen);
5364 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5366 filter_del(read_e_script);
5369 sv_catpvn(buf_sv, p, nl-p);
5370 sv_chop(PL_e_script, nl);
5376 * c-indentation-style: bsd
5378 * indent-tabs-mode: t
5381 * ex: set ts=8 sts=4 sw=4 noet: