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 = Nullgv; /* may have been freed */
751 /* unhook hooks which will soon be, or use, destroyed data */
752 SvREFCNT_dec(PL_warnhook);
753 PL_warnhook = Nullsv;
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);
874 PL_e_script = Nullsv;
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);
895 PL_statname = Nullsv;
898 /* defgv, aka *_ should be taken care of elsewhere */
900 /* clean up after study() */
901 SvREFCNT_dec(PL_lastscream);
902 PL_lastscream = Nullsv;
903 Safefree(PL_screamfirst);
905 Safefree(PL_screamnext);
909 Safefree(PL_efloatbuf);
910 PL_efloatbuf = Nullch;
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 */
933 PL_argvoutgv = Nullgv;
935 PL_stderrgv = Nullgv;
936 PL_last_in_gv = Nullgv;
941 PL_DBsingle = Nullsv;
943 PL_DBsignal = Nullsv;
944 PL_DBassertion = Nullsv;
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);
965 PL_toptarget = Nullsv;
966 SvREFCNT_dec(PL_bodytarget);
967 PL_bodytarget = Nullsv;
968 PL_formtarget = Nullsv;
970 /* free locale stuff */
971 #ifdef USE_LOCALE_COLLATE
972 Safefree(PL_collation_name);
973 PL_collation_name = Nullch;
976 #ifdef USE_LOCALE_NUMERIC
977 Safefree(PL_numeric_name);
978 PL_numeric_name = Nullch;
979 SvREFCNT_dec(PL_numeric_radix_sv);
980 PL_numeric_radix_sv = Nullsv;
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 = Nullsv;
1005 PL_utf8_alnumc = Nullsv;
1006 PL_utf8_ascii = Nullsv;
1007 PL_utf8_alpha = Nullsv;
1008 PL_utf8_space = Nullsv;
1009 PL_utf8_cntrl = Nullsv;
1010 PL_utf8_graph = Nullsv;
1011 PL_utf8_digit = Nullsv;
1012 PL_utf8_upper = Nullsv;
1013 PL_utf8_lower = Nullsv;
1014 PL_utf8_print = Nullsv;
1015 PL_utf8_punct = Nullsv;
1016 PL_utf8_xdigit = Nullsv;
1017 PL_utf8_mark = Nullsv;
1018 PL_utf8_toupper = Nullsv;
1019 PL_utf8_totitle = Nullsv;
1020 PL_utf8_tolower = Nullsv;
1021 PL_utf8_tofold = Nullsv;
1022 PL_utf8_idstart = Nullsv;
1023 PL_utf8_idcont = Nullsv;
1025 if (!specialWARN(PL_compiling.cop_warnings))
1026 SvREFCNT_dec(PL_compiling.cop_warnings);
1027 PL_compiling.cop_warnings = Nullsv;
1028 if (!specialCopIO(PL_compiling.cop_io))
1029 SvREFCNT_dec(PL_compiling.cop_io);
1030 PL_compiling.cop_io = Nullsv;
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 = Nullsv;
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 Nullsv 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 = Nullch;
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);
1229 PL_bitcount = Nullch;
1230 Safefree(PL_psig_pend);
1231 PL_psig_pend = (int*)NULL;
1232 PL_formfeed = Nullsv;
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);
1267 PL_mess_sv = Nullsv;
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", Nullch);
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);
1545 PL_main_cv = Nullcv;
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 = Nullch;
1593 #ifdef USE_SITECUSTOMIZE
1594 bool minus_f = FALSE;
1599 sv_setpvn(PL_linestr,"",0);
1600 sv = newSVpvs(""); /* first used for -I flags */
1604 for (argc--,argv++; argc > 0; argc--,argv++) {
1605 if (argv[0][0] != '-' || !argv[0][1])
1609 validarg = " PHOOEY ";
1613 * Can we rely on the kernel to start scripts with argv[1] set to
1614 * contain all #! line switches (the whole line)? (argv[0] is set to
1615 * the interpreter name, argv[2] to the script name; argv[3] and
1616 * above may contain other arguments.)
1623 #ifndef PERL_STRICT_CR
1648 if ((s = moreswitches(s)))
1653 CHECK_MALLOC_TOO_LATE_FOR('t');
1654 if( !PL_tainting ) {
1655 PL_taint_warn = TRUE;
1661 CHECK_MALLOC_TOO_LATE_FOR('T');
1663 PL_taint_warn = FALSE;
1671 #ifdef MACOS_TRADITIONAL
1672 /* ignore -e for Dev:Pseudo argument */
1673 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1678 PL_e_script = newSVpvs("");
1679 filter_add(read_e_script, NULL);
1682 sv_catpv(PL_e_script, s);
1684 sv_catpv(PL_e_script, argv[1]);
1688 Perl_croak(aTHX_ "No code specified for -%c", *s);
1689 sv_catpvs(PL_e_script, "\n");
1693 #ifdef USE_SITECUSTOMIZE
1699 case 'I': /* -I handled both here and in moreswitches() */
1701 if (!*++s && (s=argv[1]) != Nullch) {
1705 STRLEN len = strlen(s);
1706 const char * const p = savepvn(s, len);
1707 incpush(p, TRUE, TRUE, FALSE, FALSE);
1708 sv_catpvs(sv, "-I");
1709 sv_catpvn(sv, p, len);
1714 Perl_croak(aTHX_ "No directory specified for -I");
1718 PL_preprocess = TRUE;
1731 PL_preambleav = newAV();
1732 av_push(PL_preambleav,
1733 newSVpvs("use Config;"));
1737 opts_prog = newSVpvs("print Config::myconfig(),");
1739 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1741 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1743 opts = SvCUR(opts_prog);
1745 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1749 # ifdef DEBUG_LEAKING_SCALARS
1750 " DEBUG_LEAKING_SCALARS"
1752 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1753 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1755 # ifdef FAKE_THREADS
1758 # ifdef MULTIPLICITY
1767 # ifdef PERL_DONT_CREATE_GVSV
1768 " PERL_DONT_CREATE_GVSV"
1770 # ifdef PERL_GLOBAL_STRUCT
1771 " PERL_GLOBAL_STRUCT"
1773 # ifdef PERL_IMPLICIT_CONTEXT
1774 " PERL_IMPLICIT_CONTEXT"
1776 # ifdef PERL_IMPLICIT_SYS
1777 " PERL_IMPLICIT_SYS"
1779 # ifdef PERL_MALLOC_WRAP
1782 # ifdef PERL_NEED_APPCTX
1785 # ifdef PERL_NEED_TIMESBASE
1786 " PERL_NEED_TIMESBASE"
1788 # ifdef PERL_OLD_COPY_ON_WRITE
1789 " PERL_OLD_COPY_ON_WRITE"
1791 # ifdef PERL_TRACK_MEMPOOL
1792 " PERL_TRACK_MEMPOOL"
1794 # ifdef PERL_USE_SAFE_PUTENV
1795 " PERL_USE_SAFE_PUTENV"
1797 #ifdef PERL_USES_PL_PIDSTATUS
1798 " PERL_USES_PL_PIDSTATUS"
1800 # ifdef PL_OP_SLAB_ALLOC
1803 # ifdef THREADS_HAVE_PIDS
1804 " THREADS_HAVE_PIDS"
1806 # ifdef USE_5005THREADS
1809 # ifdef USE_64_BIT_ALL
1812 # ifdef USE_64_BIT_INT
1815 # ifdef USE_ITHREADS
1818 # ifdef USE_LARGE_FILES
1821 # ifdef USE_LONG_DOUBLE
1827 # ifdef USE_REENTRANT_API
1828 " USE_REENTRANT_API"
1833 # ifdef USE_SITECUSTOMIZE
1834 " USE_SITECUSTOMIZE"
1841 while (SvCUR(opts_prog) > opts+76) {
1842 /* find last space after "options: " and before col 76
1846 char * const pv = SvPV_nolen(opts_prog);
1847 const char c = pv[opts+76];
1849 space = strrchr(pv+opts+26, ' ');
1851 if (!space) break; /* "Can't happen" */
1853 /* break the line before that space */
1856 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1857 STR_WITH_LEN("\\n "));
1860 sv_catpvs(opts_prog,"\\n\",");
1862 #if defined(LOCAL_PATCH_COUNT)
1863 if (LOCAL_PATCH_COUNT > 0) {
1865 sv_catpvs(opts_prog,
1866 "\" Locally applied patches:\\n\",");
1867 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1868 if (PL_localpatches[i])
1869 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1870 0, PL_localpatches[i], 0);
1874 Perl_sv_catpvf(aTHX_ opts_prog,
1875 "\" Built under %s\\n\"",OSNAME);
1878 Perl_sv_catpvf(aTHX_ opts_prog,
1879 ",\" Compiled at %s %s\\n\"",__DATE__,
1882 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1886 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1887 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1888 "sort grep {/^PERL/} keys %ENV; ");
1890 sv_catpvs(opts_prog,
1891 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1893 sv_catpvs(opts_prog,
1894 "print \" \\%ENV:\\n @env\\n\" if @env;"
1895 "print \" \\@INC:\\n @INC\\n\";");
1899 opts_prog = Perl_newSVpvf(aTHX_
1900 "Config::config_vars(qw%c%s%c)",
1904 av_push(PL_preambleav, opts_prog);
1905 /* don't look for script or read stdin */
1906 scriptname = BIT_BUCKET;
1910 PL_doextract = TRUE;
1918 if (!*++s || isSPACE(*s)) {
1922 /* catch use of gnu style long options */
1923 if (strEQ(s, "version")) {
1927 if (strEQ(s, "help")) {
1934 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1940 #ifndef SECURE_INTERNAL_GETENV
1943 (s = PerlEnv_getenv("PERL5OPT")))
1945 const char *popt = s;
1948 if (*s == '-' && *(s+1) == 'T') {
1949 CHECK_MALLOC_TOO_LATE_FOR('T');
1951 PL_taint_warn = FALSE;
1954 char *popt_copy = Nullch;
1967 if (!strchr("CDIMUdmtwA", *s))
1968 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1972 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1973 s = popt_copy + (s - popt);
1974 d = popt_copy + (d - popt);
1981 if( !PL_tainting ) {
1982 PL_taint_warn = TRUE;
1992 #ifdef USE_SITECUSTOMIZE
1995 PL_preambleav = newAV();
1996 av_unshift(PL_preambleav, 1);
1997 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2001 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2002 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2006 scriptname = argv[0];
2009 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2011 else if (scriptname == Nullch) {
2013 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2019 /* Set $^X early so that it can be used for relocatable paths in @INC */
2020 assert (!PL_tainted);
2022 S_set_caret_X(aTHX);
2026 open_script(scriptname,dosearch,sv);
2028 validate_suid(validarg, scriptname);
2031 #if defined(SIGCHLD) || defined(SIGCLD)
2034 # define SIGCHLD SIGCLD
2036 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2037 if (sigstate == (Sighandler_t) SIG_IGN) {
2038 if (ckWARN(WARN_SIGNAL))
2039 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2040 "Can't ignore signal CHLD, forcing to default");
2041 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2047 #ifdef MACOS_TRADITIONAL
2048 if (PL_doextract || gMacPerl_AlwaysExtract) {
2053 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2054 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2058 PL_main_cv = PL_compcv = (CV*)newSV(0);
2059 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2060 CvUNIQUE_on(PL_compcv);
2062 CvPADLIST(PL_compcv) = pad_new(0);
2063 #ifdef USE_5005THREADS
2064 CvOWNER(PL_compcv) = 0;
2065 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2066 MUTEX_INIT(CvMUTEXP(PL_compcv));
2067 #endif /* USE_5005THREADS */
2070 boot_core_UNIVERSAL();
2071 boot_core_xsutils();
2074 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2076 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2082 # ifdef HAS_SOCKS5_INIT
2083 socks5_init(argv[0]);
2089 init_predump_symbols();
2090 /* init_postdump_symbols not currently designed to be called */
2091 /* more than once (ENV isn't cleared first, for example) */
2092 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2094 init_postdump_symbols(argc,argv,env);
2096 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2097 * or explicitly in some platforms.
2098 * locale.c:Perl_init_i18nl10n() if the environment
2099 * look like the user wants to use UTF-8. */
2100 #if defined(__SYMBIAN32__)
2101 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2104 /* Requires init_predump_symbols(). */
2105 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2110 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2111 * and the default open disciplines. */
2112 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2113 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2115 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2116 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2117 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2119 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2120 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2121 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2123 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2124 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2125 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2127 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2128 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2131 sv_setpvn(sv, ":utf8\0:utf8", 11);
2133 sv_setpvn(sv, ":utf8\0", 6);
2136 sv_setpvn(sv, "\0:utf8", 6);
2142 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2143 if (strEQ(s, "unsafe"))
2144 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2145 else if (strEQ(s, "safe"))
2146 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2148 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2153 /* now parse the script */
2155 SETERRNO(0,SS_NORMAL);
2157 #ifdef MACOS_TRADITIONAL
2158 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2160 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2162 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2163 MacPerl_MPWFileName(PL_origfilename));
2167 if (yyparse() || PL_error_count) {
2169 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2171 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2176 CopLINE_set(PL_curcop, 0);
2177 PL_curstash = PL_defstash;
2178 PL_preprocess = FALSE;
2180 SvREFCNT_dec(PL_e_script);
2181 PL_e_script = Nullsv;
2188 SAVECOPFILE(PL_curcop);
2189 SAVECOPLINE(PL_curcop);
2190 gv_check(PL_defstash);
2197 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2198 dump_mstats("after compilation:");
2207 =for apidoc perl_run
2209 Tells a Perl interpreter to run. See L<perlembed>.
2222 PERL_UNUSED_ARG(my_perl);
2224 oldscope = PL_scopestack_ix;
2232 cxstack_ix = -1; /* start context stack again */
2234 case 0: /* normal completion */
2238 case 2: /* my_exit() */
2239 while (PL_scopestack_ix > oldscope)
2242 PL_curstash = PL_defstash;
2243 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2244 PL_endav && !PL_minus_c)
2245 call_list(oldscope, PL_endav);
2247 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2248 dump_mstats("after execution: ");
2254 POPSTACK_TO(PL_mainstack);
2257 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2269 S_run_body(pTHX_ I32 oldscope)
2272 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2273 PL_sawampersand ? "Enabling" : "Omitting"));
2275 if (!PL_restartop) {
2276 DEBUG_x(dump_all());
2279 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2281 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2285 #ifdef MACOS_TRADITIONAL
2286 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2287 (gMacPerl_ErrorFormat ? "# " : ""),
2288 MacPerl_MPWFileName(PL_origfilename));
2290 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2294 if (PERLDB_SINGLE && PL_DBsingle)
2295 sv_setiv(PL_DBsingle, 1);
2297 call_list(oldscope, PL_initav);
2303 PL_op = PL_restartop;
2307 else if (PL_main_start) {
2308 CvDEPTH(PL_main_cv) = 1;
2309 PL_op = PL_main_start;
2317 =head1 SV Manipulation Functions
2319 =for apidoc p||get_sv
2321 Returns the SV of the specified Perl scalar. If C<create> is set and the
2322 Perl variable does not exist then it will be created. If C<create> is not
2323 set and the variable does not exist then NULL is returned.
2329 Perl_get_sv(pTHX_ const char *name, I32 create)
2332 #ifdef USE_5005THREADS
2333 if (name[1] == '\0' && !isALPHA(name[0])) {
2334 PADOFFSET tmp = find_threadsv(name);
2335 if (tmp != NOT_IN_PAD)
2336 return THREADSV(tmp);
2338 #endif /* USE_5005THREADS */
2339 gv = gv_fetchpv(name, create, SVt_PV);
2346 =head1 Array Manipulation Functions
2348 =for apidoc p||get_av
2350 Returns the AV of the specified Perl array. If C<create> is set and the
2351 Perl variable does not exist then it will be created. If C<create> is not
2352 set and the variable does not exist then NULL is returned.
2358 Perl_get_av(pTHX_ const char *name, I32 create)
2360 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2369 =head1 Hash Manipulation Functions
2371 =for apidoc p||get_hv
2373 Returns the HV of the specified Perl hash. If C<create> is set and the
2374 Perl variable does not exist then it will be created. If C<create> is not
2375 set and the variable does not exist then NULL is returned.
2381 Perl_get_hv(pTHX_ const char *name, I32 create)
2383 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2392 =head1 CV Manipulation Functions
2394 =for apidoc p||get_cv
2396 Returns the CV of the specified Perl subroutine. If C<create> is set and
2397 the Perl subroutine does not exist then it will be declared (which has the
2398 same effect as saying C<sub name;>). If C<create> is not set and the
2399 subroutine does not exist then NULL is returned.
2405 Perl_get_cv(pTHX_ const char *name, I32 create)
2407 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2408 /* XXX unsafe for threads if eval_owner isn't held */
2409 /* XXX this is probably not what they think they're getting.
2410 * It has the same effect as "sub name;", i.e. just a forward
2412 if (create && !GvCVu(gv))
2413 return newSUB(start_subparse(FALSE, 0),
2414 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2422 /* Be sure to refetch the stack pointer after calling these routines. */
2426 =head1 Callback Functions
2428 =for apidoc p||call_argv
2430 Performs a callback to the specified Perl sub. See L<perlcall>.
2436 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2438 /* See G_* flags in cop.h */
2439 /* null terminated arg list */
2447 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2452 return call_pv(sub_name, flags);
2456 =for apidoc p||call_pv
2458 Performs a callback to the specified Perl sub. See L<perlcall>.
2464 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2465 /* name of the subroutine */
2466 /* See G_* flags in cop.h */
2468 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2472 =for apidoc p||call_method
2474 Performs a callback to the specified Perl method. The blessed object must
2475 be on the stack. See L<perlcall>.
2481 Perl_call_method(pTHX_ const char *methname, I32 flags)
2482 /* name of the subroutine */
2483 /* See G_* flags in cop.h */
2485 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2488 /* May be called with any of a CV, a GV, or an SV containing the name. */
2490 =for apidoc p||call_sv
2492 Performs a callback to the Perl sub whose name is in the SV. See
2499 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2500 /* See G_* flags in cop.h */
2503 LOGOP myop; /* fake syntax tree node */
2506 volatile I32 retval = 0;
2508 bool oldcatch = CATCH_GET;
2510 OP* const oldop = PL_op;
2513 if (flags & G_DISCARD) {
2518 Zero(&myop, 1, LOGOP);
2519 myop.op_next = Nullop;
2520 if (!(flags & G_NOARGS))
2521 myop.op_flags |= OPf_STACKED;
2522 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2523 (flags & G_ARRAY) ? OPf_WANT_LIST :
2528 EXTEND(PL_stack_sp, 1);
2529 *++PL_stack_sp = sv;
2531 oldscope = PL_scopestack_ix;
2533 if (PERLDB_SUB && PL_curstash != PL_debstash
2534 /* Handle first BEGIN of -d. */
2535 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2536 /* Try harder, since this may have been a sighandler, thus
2537 * curstash may be meaningless. */
2538 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2539 && !(flags & G_NODEBUG))
2540 PL_op->op_private |= OPpENTERSUB_DB;
2542 if (flags & G_METHOD) {
2543 Zero(&method_op, 1, UNOP);
2544 method_op.op_next = PL_op;
2545 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2546 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2547 PL_op = (OP*)&method_op;
2550 if (!(flags & G_EVAL)) {
2552 call_body((OP*)&myop, FALSE);
2553 retval = PL_stack_sp - (PL_stack_base + oldmark);
2554 CATCH_SET(oldcatch);
2557 myop.op_other = (OP*)&myop;
2559 /* we're trying to emulate pp_entertry() here */
2561 register PERL_CONTEXT *cx;
2562 const I32 gimme = GIMME_V;
2567 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2569 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2571 PL_in_eval = EVAL_INEVAL;
2572 if (flags & G_KEEPERR)
2573 PL_in_eval |= EVAL_KEEPERR;
2575 sv_setpvn(ERRSV,"",0);
2583 call_body((OP*)&myop, FALSE);
2584 retval = PL_stack_sp - (PL_stack_base + oldmark);
2585 if (!(flags & G_KEEPERR))
2586 sv_setpvn(ERRSV,"",0);
2592 /* my_exit() was called */
2593 PL_curstash = PL_defstash;
2596 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2597 Perl_croak(aTHX_ "Callback called exit");
2602 PL_op = PL_restartop;
2606 PL_stack_sp = PL_stack_base + oldmark;
2607 if (flags & G_ARRAY)
2611 *++PL_stack_sp = &PL_sv_undef;
2616 if (PL_scopestack_ix > oldscope) {
2620 register PERL_CONTEXT *cx;
2627 PERL_UNUSED_VAR(newsp);
2628 PERL_UNUSED_VAR(gimme);
2629 PERL_UNUSED_VAR(optype);
2634 if (flags & G_DISCARD) {
2635 PL_stack_sp = PL_stack_base + oldmark;
2645 S_call_body(pTHX_ const OP *myop, bool is_eval)
2648 if (PL_op == myop) {
2650 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2652 PL_op = Perl_pp_entersub(aTHX); /* this does */
2658 /* Eval a string. The G_EVAL flag is always assumed. */
2661 =for apidoc p||eval_sv
2663 Tells Perl to C<eval> the string in the SV.
2669 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2671 /* See G_* flags in cop.h */
2675 UNOP myop; /* fake syntax tree node */
2676 volatile I32 oldmark = SP - PL_stack_base;
2677 volatile I32 retval = 0;
2679 OP* const oldop = PL_op;
2682 if (flags & G_DISCARD) {
2689 Zero(PL_op, 1, UNOP);
2690 EXTEND(PL_stack_sp, 1);
2691 *++PL_stack_sp = sv;
2693 if (!(flags & G_NOARGS))
2694 myop.op_flags = OPf_STACKED;
2695 myop.op_next = Nullop;
2696 myop.op_type = OP_ENTEREVAL;
2697 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2698 (flags & G_ARRAY) ? OPf_WANT_LIST :
2700 if (flags & G_KEEPERR)
2701 myop.op_flags |= OPf_SPECIAL;
2703 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2704 * before a PUSHEVAL, which corrupts the stack after a croak */
2705 TAINT_PROPER("eval_sv()");
2711 call_body((OP*)&myop,TRUE);
2712 retval = PL_stack_sp - (PL_stack_base + oldmark);
2713 if (!(flags & G_KEEPERR))
2714 sv_setpvn(ERRSV,"",0);
2720 /* my_exit() was called */
2721 PL_curstash = PL_defstash;
2724 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2725 Perl_croak(aTHX_ "Callback called exit");
2730 PL_op = PL_restartop;
2734 PL_stack_sp = PL_stack_base + oldmark;
2735 if (flags & G_ARRAY)
2739 *++PL_stack_sp = &PL_sv_undef;
2745 if (flags & G_DISCARD) {
2746 PL_stack_sp = PL_stack_base + oldmark;
2756 =for apidoc p||eval_pv
2758 Tells Perl to C<eval> the given string and return an SV* result.
2764 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2768 SV* sv = newSVpv(p, 0);
2770 eval_sv(sv, G_SCALAR);
2777 if (croak_on_error && SvTRUE(ERRSV)) {
2778 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2784 /* Require a module. */
2787 =head1 Embedding Functions
2789 =for apidoc p||require_pv
2791 Tells Perl to C<require> the file named by the string argument. It is
2792 analogous to the Perl code C<eval "require '$file'">. It's even
2793 implemented that way; consider using load_module instead.
2798 Perl_require_pv(pTHX_ const char *pv)
2803 PUSHSTACKi(PERLSI_REQUIRE);
2805 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2806 eval_sv(sv_2mortal(sv), G_DISCARD);
2812 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2814 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2817 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2821 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2823 /* This message really ought to be max 23 lines.
2824 * Removed -h because the user already knows that option. Others? */
2826 static const char * const usage_msg[] = {
2827 "-0[octal] specify record separator (\\0, if no argument)",
2828 "-A[mod][=pattern] activate all/given assertions",
2829 "-a autosplit mode with -n or -p (splits $_ into @F)",
2830 "-C[number/list] enables the listed Unicode features",
2831 "-c check syntax only (runs BEGIN and CHECK blocks)",
2832 "-d[:debugger] run program under debugger",
2833 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2834 "-e program one line of program (several -e's allowed, omit programfile)",
2835 "-E program like -e, but enables all optional features",
2836 "-f don't do $sitelib/sitecustomize.pl at startup",
2837 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2838 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2839 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2840 "-l[octal] enable line ending processing, specifies line terminator",
2841 "-[mM][-]module execute \"use/no module...\" before executing program",
2842 "-n assume \"while (<>) { ... }\" loop around program",
2843 "-p assume loop like -n but print line also, like sed",
2844 "-P run program through C preprocessor before compilation",
2845 "-s enable rudimentary parsing for switches after programfile",
2846 "-S look for programfile using PATH environment variable",
2847 "-t enable tainting warnings",
2848 "-T enable tainting checks",
2849 "-u dump core after parsing program",
2850 "-U allow unsafe operations",
2851 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2852 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2853 "-w enable many useful warnings (RECOMMENDED)",
2854 "-W enable all warnings",
2855 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2856 "-X disable all warnings",
2860 const char * const *p = usage_msg;
2862 PerlIO_printf(PerlIO_stdout(),
2863 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2866 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2869 /* convert a string of -D options (or digits) into an int.
2870 * sets *s to point to the char after the options */
2874 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2876 static const char * const usage_msgd[] = {
2877 " Debugging flag values: (see also -d)",
2878 " p Tokenizing and parsing (with v, displays parse stack)",
2879 " s Stack snapshots (with v, displays all stacks)",
2880 " l Context (loop) stack processing",
2881 " t Trace execution",
2882 " o Method and overloading resolution",
2883 " c String/numeric conversions",
2884 " P Print profiling info, preprocessor command for -P, source file input state",
2885 " m Memory allocation",
2886 " f Format processing",
2887 " r Regular expression parsing and execution",
2888 " x Syntax tree dump",
2889 " u Tainting checks",
2890 " H Hash dump -- usurps values()",
2891 " X Scratchpad allocation",
2893 " S Thread synchronization",
2895 " R Include reference counts of dumped variables (eg when using -Ds)",
2896 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2897 " v Verbose: use in conjunction with other flags",
2899 " A Consistency checks on internal structures",
2900 " q quiet - currently only suppresses the 'EXECUTING' message",
2905 /* if adding extra options, remember to update DEBUG_MASK */
2906 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2908 for (; isALNUM(**s); (*s)++) {
2909 const char * const d = strchr(debopts,**s);
2911 i |= 1 << (d - debopts);
2912 else if (ckWARN_d(WARN_DEBUGGING))
2913 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2914 "invalid option -D%c, use -D'' to see choices\n", **s);
2917 else if (isDIGIT(**s)) {
2919 for (; isALNUM(**s); (*s)++) ;
2921 else if (givehelp) {
2922 const char *const *p = usage_msgd;
2923 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2926 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2927 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2928 "-Dp not implemented on this platform\n");
2934 /* This routine handles any switches that can be given during run */
2937 Perl_moreswitches(pTHX_ char *s)
2948 SvREFCNT_dec(PL_rs);
2949 if (s[1] == 'x' && s[2]) {
2950 const char *e = s+=2;
2956 flags = PERL_SCAN_SILENT_ILLDIGIT;
2957 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2958 if (s + numlen < e) {
2959 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2963 PL_rs = newSVpvs("");
2964 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2965 tmps = (U8*)SvPVX(PL_rs);
2966 uvchr_to_utf8(tmps, rschar);
2967 SvCUR_set(PL_rs, UNISKIP(rschar));
2972 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2973 if (rschar & ~((U8)~0))
2974 PL_rs = &PL_sv_undef;
2975 else if (!rschar && numlen >= 2)
2976 PL_rs = newSVpvs("");
2978 char ch = (char)rschar;
2979 PL_rs = newSVpvn(&ch, 1);
2982 sv_setsv(get_sv("/", TRUE), PL_rs);
2987 PL_unicode = parse_unicode_opts( (const char **)&s );
2992 while (*s && !isSPACE(*s)) ++s;
2994 PL_splitstr = savepv(PL_splitstr);
3008 /* -dt indicates to the debugger that threads will be used */
3009 if (*s == 't' && !isALNUM(s[1])) {
3011 my_setenv("PERL5DB_THREADED", "1");
3014 /* The following permits -d:Mod to accepts arguments following an =
3015 in the fashion that -MSome::Mod does. */
3016 if (*s == ':' || *s == '=') {
3018 SV * const sv = newSVpvs("use Devel::");
3020 /* We now allow -d:Module=Foo,Bar */
3021 while(isALNUM(*s) || *s==':') ++s;
3023 sv_catpv(sv, start);
3025 sv_catpvn(sv, start, s-start);
3026 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3029 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3032 PL_perldb = PERLDB_ALL;
3041 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3042 #else /* !DEBUGGING */
3043 if (ckWARN_d(WARN_DEBUGGING))
3044 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3045 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3046 for (s++; isALNUM(*s); s++) ;
3051 usage(PL_origargv[0]);
3054 Safefree(PL_inplace);
3055 #if defined(__CYGWIN__) /* do backup extension automagically */
3056 if (*(s+1) == '\0') {
3057 PL_inplace = savepvs(".bak");
3060 #endif /* __CYGWIN__ */
3061 PL_inplace = savepv(s+1);
3062 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3066 if (*s == '-') /* Additional switches on #! line. */
3070 case 'I': /* -I handled both here and in parse_body() */
3073 while (*s && isSPACE(*s))
3078 /* ignore trailing spaces (possibly followed by other switches) */
3080 for (e = p; *e && !isSPACE(*e); e++) ;
3084 } while (*p && *p != '-');
3085 e = savepvn(s, e-s);
3086 incpush(e, TRUE, TRUE, FALSE, FALSE);
3093 Perl_croak(aTHX_ "No directory specified for -I");
3099 SvREFCNT_dec(PL_ors_sv);
3105 PL_ors_sv = newSVpvs("\n");
3106 numlen = 3 + (*s == '0');
3107 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3111 if (RsPARA(PL_rs)) {
3112 PL_ors_sv = newSVpvs("\n\n");
3115 PL_ors_sv = newSVsv(PL_rs);
3122 PL_preambleav = newAV();
3125 char * const start = s;
3126 SV * const sv = newSVpvs("use assertions::activate");
3127 while(isALNUM(*s) || *s == ':') ++s;
3129 sv_catpvs(sv, "::");
3130 sv_catpvn(sv, start, s-start);
3133 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3136 else if (*s != '\0') {
3137 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3139 av_push(PL_preambleav, sv);
3143 forbid_setid("-M"); /* XXX ? */
3146 forbid_setid("-m"); /* XXX ? */
3150 const char *use = "use ";
3151 /* -M-foo == 'no foo' */
3152 /* Leading space on " no " is deliberate, to make both
3153 possibilities the same length. */
3154 if (*s == '-') { use = " no "; ++s; }
3155 sv = newSVpvn(use,4);
3157 /* We allow -M'Module qw(Foo Bar)' */
3158 while(isALNUM(*s) || *s==':') ++s;
3160 sv_catpv(sv, start);
3161 if (*(start-1) == 'm') {
3163 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3164 sv_catpvs( sv, " ()");
3168 Perl_croak(aTHX_ "Module name required with -%c option",
3170 sv_catpvn(sv, start, s-start);
3171 sv_catpvs(sv, " split(/,/,q");
3172 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3174 sv_catpvs(sv, "\0)");
3178 PL_preambleav = newAV();
3179 av_push(PL_preambleav, sv);
3182 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3194 PL_doswitches = TRUE;
3208 #ifdef MACOS_TRADITIONAL
3209 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3211 PL_do_undump = TRUE;
3219 if (!sv_derived_from(PL_patchlevel, "version"))
3220 upg_version(PL_patchlevel);
3222 PerlIO_printf(PerlIO_stdout(),
3223 Perl_form(aTHX_ "\nThis is perl, %"SVf
3224 #ifdef PERL_PATCHNUM
3225 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3228 vstringify(PL_patchlevel),
3231 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3232 PerlIO_printf(PerlIO_stdout(),
3233 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3234 vstringify(PL_patchlevel)));
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ " built under %s at %s %s\n",
3237 OSNAME, __DATE__, __TIME__));
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ " OS Specific Release: %s\n",
3243 #if defined(LOCAL_PATCH_COUNT)
3244 if (LOCAL_PATCH_COUNT > 0)
3245 PerlIO_printf(PerlIO_stdout(),
3246 "\n(with %d registered patch%s, "
3247 "see perl -V for more detail)",
3248 (int)LOCAL_PATCH_COUNT,
3249 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "\n\nCopyright 1987-2006, Larry Wall\n");
3254 #ifdef MACOS_TRADITIONAL
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3257 "maintained by Chris Nandor\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3266 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3271 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3274 PerlIO_printf(PerlIO_stdout(),
3275 "atariST series port, ++jrb bammi@cadence.com\n");
3278 PerlIO_printf(PerlIO_stdout(),
3279 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "MiNT port by Guido Flohr, 1997-1999\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "EPOC port by Olaf Flebbe, 1999-2002\n");
3310 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3311 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3314 #ifdef __SYMBIAN32__
3315 PerlIO_printf(PerlIO_stdout(),
3316 "Symbian port by Nokia, 2004-2005\n");
3318 #ifdef BINARY_BUILD_NOTICE
3319 BINARY_BUILD_NOTICE;
3321 PerlIO_printf(PerlIO_stdout(),
3323 Perl may be copied only under the terms of either the Artistic License or the\n\
3324 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3325 Complete documentation for Perl, including FAQ lists, should be found on\n\
3326 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3327 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3330 if (! (PL_dowarn & G_WARN_ALL_MASK))
3331 PL_dowarn |= G_WARN_ON;
3335 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3336 if (!specialWARN(PL_compiling.cop_warnings))
3337 SvREFCNT_dec(PL_compiling.cop_warnings);
3338 PL_compiling.cop_warnings = pWARN_ALL ;
3342 PL_dowarn = G_WARN_ALL_OFF;
3343 if (!specialWARN(PL_compiling.cop_warnings))
3344 SvREFCNT_dec(PL_compiling.cop_warnings);
3345 PL_compiling.cop_warnings = pWARN_NONE ;
3350 if (s[1] == '-') /* Additional switches on #! line. */
3355 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3361 #ifdef ALTERNATE_SHEBANG
3362 case 'S': /* OS/2 needs -S on "extproc" line. */
3370 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3375 /* compliments of Tom Christiansen */
3377 /* unexec() can be found in the Gnu emacs distribution */
3378 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3381 Perl_my_unexec(pTHX)
3389 prog = newSVpv(BIN_EXP, 0);
3390 sv_catpvs(prog, "/perl");
3391 file = newSVpv(PL_origfilename, 0);
3392 sv_catpvs(file, ".perldump");
3394 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3395 /* unexec prints msg to stderr in case of failure */
3396 PerlProc_exit(status);
3399 # include <lib$routines.h>
3400 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3401 # elif defined(WIN32) || defined(__CYGWIN__)
3402 Perl_croak(aTHX_ "dump is not supported");
3404 ABORT(); /* for use with undump */
3409 /* initialize curinterp */
3415 # define PERLVAR(var,type)
3416 # define PERLVARA(var,n,type)
3417 # if defined(PERL_IMPLICIT_CONTEXT)
3418 # if defined(USE_5005THREADS)
3419 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3420 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3421 # else /* !USE_5005THREADS */
3422 # define PERLVARI(var,type,init) aTHX->var = init;
3423 # define PERLVARIC(var,type,init) aTHX->var = init;
3424 # endif /* USE_5005THREADS */
3426 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3427 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3429 # include "intrpvar.h"
3430 # ifndef USE_5005THREADS
3431 # include "thrdvar.h"
3438 # define PERLVAR(var,type)
3439 # define PERLVARA(var,n,type)
3440 # define PERLVARI(var,type,init) PL_##var = init;
3441 # define PERLVARIC(var,type,init) PL_##var = init;
3442 # include "intrpvar.h"
3443 # ifndef USE_5005THREADS
3444 # include "thrdvar.h"
3455 S_init_main_stash(pTHX)
3460 PL_curstash = PL_defstash = newHV();
3461 /* We know that the string "main" will be in the global shared string
3462 table, so it's a small saving to use it rather than allocate another
3464 PL_curstname = newSVpvs_share("main");
3465 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3466 /* If we hadn't caused another reference to "main" to be in the shared
3467 string table above, then it would be worth reordering these two,
3468 because otherwise all we do is delete "main" from it as a consequence
3469 of the SvREFCNT_dec, only to add it again with hv_name_set */
3470 SvREFCNT_dec(GvHV(gv));
3471 hv_name_set(PL_defstash, "main", 4, 0);
3472 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3474 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3476 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3477 GvMULTI_on(PL_incgv);
3478 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3479 GvMULTI_on(PL_hintgv);
3480 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3481 SvREFCNT_inc(PL_defgv);
3482 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3483 SvREFCNT_inc(PL_errgv);
3484 GvMULTI_on(PL_errgv);
3485 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3486 GvMULTI_on(PL_replgv);
3487 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3488 #ifdef PERL_DONT_CREATE_GVSV
3491 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3492 sv_setpvn(ERRSV, "", 0);
3493 PL_curstash = PL_defstash;
3494 CopSTASH_set(&PL_compiling, PL_defstash);
3495 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3496 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3498 /* We must init $/ before switches are processed. */
3499 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3502 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3504 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3509 const char *cpp_discard_flag;
3518 PL_origfilename = savepvs("-e");
3521 /* if find_script() returns, it returns a malloc()-ed value */
3522 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3524 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3525 const char *s = scriptname + 8;
3526 PL_fdscript = atoi(s);
3531 * Tell apart "normal" usage of fdscript, e.g.
3532 * with bash on FreeBSD:
3533 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3534 * from usage in suidperl.
3535 * Does any "normal" usage leave garbage after the number???
3536 * Is it a mistake to use a similar /dev/fd/ construct for
3541 * Be supersafe and do some sanity-checks.
3542 * Still, can we be sure we got the right thing?
3545 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3548 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3550 scriptname = savepv(s + 1);
3551 Safefree(PL_origfilename);
3552 PL_origfilename = (char *)scriptname;
3557 CopFILE_free(PL_curcop);
3558 CopFILE_set(PL_curcop, PL_origfilename);
3559 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3560 scriptname = (char *)"";
3561 if (PL_fdscript >= 0) {
3562 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3563 # if defined(HAS_FCNTL) && defined(F_SETFD)
3565 /* ensure close-on-exec */
3566 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3571 Perl_croak(aTHX_ "sperl needs fd script\n"
3572 "You should not call sperl directly; do you need to "
3573 "change a #! line\nfrom sperl to perl?\n");
3576 * Do not open (or do other fancy stuff) while setuid.
3577 * Perl does the open, and hands script to suidperl on a fd;
3578 * suidperl only does some checks, sets up UIDs and re-execs
3579 * perl with that fd as it has always done.
3582 if (PL_suidscript != 1) {
3583 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3586 else if (PL_preprocess) {
3587 const char * const cpp_cfg = CPPSTDIN;
3588 SV * const cpp = newSVpvs("");
3589 SV * const cmd = newSV(0);
3591 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3592 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3593 if (strEQ(cpp_cfg, "cppstdin"))
3594 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3595 sv_catpv(cpp, cpp_cfg);
3598 sv_catpvs(sv, "-I");
3599 sv_catpv(sv,PRIVLIB_EXP);
3602 DEBUG_P(PerlIO_printf(Perl_debug_log,
3603 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3604 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3607 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3614 cpp_discard_flag = "";
3616 cpp_discard_flag = "-C";
3620 perl = os2_execname(aTHX);
3622 perl = PL_origargv[0];
3626 /* This strips off Perl comments which might interfere with
3627 the C pre-processor, including #!. #line directives are
3628 deliberately stripped to avoid confusion with Perl's version
3629 of #line. FWP played some golf with it so it will fit
3630 into VMS's 255 character buffer.
3633 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3635 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3637 Perl_sv_setpvf(aTHX_ cmd, "\
3638 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3639 perl, quote, code, quote, scriptname, cpp,
3640 cpp_discard_flag, sv, CPPMINUS);
3642 PL_doextract = FALSE;
3644 DEBUG_P(PerlIO_printf(Perl_debug_log,
3645 "PL_preprocess: cmd=\"%s\"\n",
3648 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3652 else if (!*scriptname) {
3653 forbid_setid("program input from stdin");
3654 PL_rsfp = PerlIO_stdin();
3657 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3658 # if defined(HAS_FCNTL) && defined(F_SETFD)
3660 /* ensure close-on-exec */
3661 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3664 #endif /* IAMSUID */
3666 /* PSz 16 Sep 03 Keep neat error message */
3668 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3670 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3671 CopFILE(PL_curcop), Strerror(errno));
3676 * I_SYSSTATVFS HAS_FSTATVFS
3678 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3679 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3680 * here so that metaconfig picks them up. */
3684 S_fd_on_nosuid_fs(pTHX_ int fd)
3687 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3688 * but is needed also on machines without setreuid.
3689 * Seems safe enough to run as root.
3691 int check_okay = 0; /* able to do all the required sys/libcalls */
3692 int on_nosuid = 0; /* the fd is on a nosuid fs */
3694 * Need to check noexec also: nosuid might not be set, the average
3695 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3697 int on_noexec = 0; /* the fd is on a noexec fs */
3700 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3701 * fstatvfs() is UNIX98.
3702 * fstatfs() is 4.3 BSD.
3703 * ustat()+getmnt() is pre-4.3 BSD.
3704 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3705 * an irrelevant filesystem while trying to reach the right one.
3708 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3710 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3711 defined(HAS_FSTATVFS)
3712 # define FD_ON_NOSUID_CHECK_OKAY
3713 struct statvfs stfs;
3715 check_okay = fstatvfs(fd, &stfs) == 0;
3716 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3718 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3719 on platforms where it is present. */
3720 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3722 # endif /* fstatvfs */
3724 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3725 defined(PERL_MOUNT_NOSUID) && \
3726 defined(PERL_MOUNT_NOEXEC) && \
3727 defined(HAS_FSTATFS) && \
3728 defined(HAS_STRUCT_STATFS) && \
3729 defined(HAS_STRUCT_STATFS_F_FLAGS)
3730 # define FD_ON_NOSUID_CHECK_OKAY
3733 check_okay = fstatfs(fd, &stfs) == 0;
3734 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3735 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3736 # endif /* fstatfs */
3738 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3739 defined(PERL_MOUNT_NOSUID) && \
3740 defined(PERL_MOUNT_NOEXEC) && \
3741 defined(HAS_FSTAT) && \
3742 defined(HAS_USTAT) && \
3743 defined(HAS_GETMNT) && \
3744 defined(HAS_STRUCT_FS_DATA) && \
3746 # define FD_ON_NOSUID_CHECK_OKAY
3749 if (fstat(fd, &fdst) == 0) {
3751 if (ustat(fdst.st_dev, &us) == 0) {
3753 /* NOSTAT_ONE here because we're not examining fields which
3754 * vary between that case and STAT_ONE. */
3755 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3756 size_t cmplen = sizeof(us.f_fname);
3757 if (sizeof(fsd.fd_req.path) < cmplen)
3758 cmplen = sizeof(fsd.fd_req.path);
3759 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3760 fdst.st_dev == fsd.fd_req.dev) {
3762 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3763 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3768 # endif /* fstat+ustat+getmnt */
3770 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3771 defined(HAS_GETMNTENT) && \
3772 defined(HAS_HASMNTOPT) && \
3773 defined(MNTOPT_NOSUID) && \
3774 defined(MNTOPT_NOEXEC)
3775 # define FD_ON_NOSUID_CHECK_OKAY
3776 FILE *mtab = fopen("/etc/mtab", "r");
3777 struct mntent *entry;
3780 if (mtab && (fstat(fd, &stb) == 0)) {
3781 while (entry = getmntent(mtab)) {
3782 if (stat(entry->mnt_dir, &fsb) == 0
3783 && fsb.st_dev == stb.st_dev)
3785 /* found the filesystem */
3787 if (hasmntopt(entry, MNTOPT_NOSUID))
3789 if (hasmntopt(entry, MNTOPT_NOEXEC))
3792 } /* A single fs may well fail its stat(). */
3797 # endif /* getmntent+hasmntopt */
3800 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3802 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3804 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3805 return ((!check_okay) || on_nosuid || on_noexec);
3807 #endif /* IAMSUID */
3810 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3815 #endif /* IAMSUID */
3817 /* do we need to emulate setuid on scripts? */
3819 /* This code is for those BSD systems that have setuid #! scripts disabled
3820 * in the kernel because of a security problem. Merely defining DOSUID
3821 * in perl will not fix that problem, but if you have disabled setuid
3822 * scripts in the kernel, this will attempt to emulate setuid and setgid
3823 * on scripts that have those now-otherwise-useless bits set. The setuid
3824 * root version must be called suidperl or sperlN.NNN. If regular perl
3825 * discovers that it has opened a setuid script, it calls suidperl with
3826 * the same argv that it had. If suidperl finds that the script it has
3827 * just opened is NOT setuid root, it sets the effective uid back to the
3828 * uid. We don't just make perl setuid root because that loses the
3829 * effective uid we had before invoking perl, if it was different from the
3832 * Description/comments above do not match current workings:
3833 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3834 * suidperl called with script open and name changed to /dev/fd/N/X;
3835 * suidperl croaks if script is not setuid;
3836 * making perl setuid would be a huge security risk (and yes, that
3837 * would lose any euid we might have had).
3839 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3840 * be defined in suidperl only. suidperl must be setuid root. The
3841 * Configure script will set this up for you if you want it.
3847 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3848 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3849 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3851 const char *linestr;
3855 if (PL_fdscript < 0 || PL_suidscript != 1)
3856 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3858 * Since the script is opened by perl, not suidperl, some of these
3859 * checks are superfluous. Leaving them in probably does not lower
3863 * Do checks even for systems with no HAS_SETREUID.
3864 * We used to swap, then re-swap UIDs with
3866 if (setreuid(PL_euid,PL_uid) < 0
3867 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3868 Perl_croak(aTHX_ "Can't swap uid and euid");
3871 if (setreuid(PL_uid,PL_euid) < 0
3872 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3873 Perl_croak(aTHX_ "Can't reswap uid and euid");
3877 /* On this access check to make sure the directories are readable,
3878 * there is actually a small window that the user could use to make
3879 * filename point to an accessible directory. So there is a faint
3880 * chance that someone could execute a setuid script down in a
3881 * non-accessible directory. I don't know what to do about that.
3882 * But I don't think it's too important. The manual lies when
3883 * it says access() is useful in setuid programs.
3885 * So, access() is pretty useless... but not harmful... do anyway.
3887 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3888 Perl_croak(aTHX_ "Can't access() script\n");
3891 /* If we can swap euid and uid, then we can determine access rights
3892 * with a simple stat of the file, and then compare device and
3893 * inode to make sure we did stat() on the same file we opened.
3894 * Then we just have to make sure he or she can execute it.
3897 * As the script is opened by perl, not suidperl, we do not need to
3898 * care much about access rights.
3900 * The 'script changed' check is needed, or we can get lied to
3901 * about $0 with e.g.
3902 * suidperl /dev/fd/4//bin/x 4<setuidscript
3903 * Without HAS_SETREUID, is it safe to stat() as root?
3905 * Are there any operating systems that pass /dev/fd/xxx for setuid
3906 * scripts, as suggested/described in perlsec(1)? Surely they do not
3907 * pass the script name as we do, so the "script changed" test would
3908 * fail for them... but we never get here with
3909 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3911 * This is one place where we must "lie" about return status: not
3912 * say if the stat() failed. We are doing this as root, and could
3913 * be tricked into reporting existence or not of files that the
3914 * "plain" user cannot even see.
3918 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3919 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3920 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3921 Perl_croak(aTHX_ "Setuid script changed\n");
3925 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3926 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3929 * We used to do this check as the "plain" user (after swapping
3930 * UIDs). But the check for nosuid and noexec filesystem is needed,
3931 * and should be done even without HAS_SETREUID. (Maybe those
3932 * operating systems do not have such mount options anyway...)
3933 * Seems safe enough to do as root.
3935 #if !defined(NO_NOSUID_CHECK)
3936 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3937 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3940 #endif /* IAMSUID */
3942 if (!S_ISREG(PL_statbuf.st_mode)) {
3943 Perl_croak(aTHX_ "Setuid script not plain file\n");
3945 if (PL_statbuf.st_mode & S_IWOTH)
3946 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3947 PL_doswitches = FALSE; /* -s is insecure in suid */
3948 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3949 CopLINE_inc(PL_curcop);
3950 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch)
3951 Perl_croak(aTHX_ "No #! line");
3952 linestr = SvPV_nolen_const(PL_linestr);
3953 /* required even on Sys V */
3954 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3955 Perl_croak(aTHX_ "No #! line");
3959 /* Sanity check on line length */
3960 s_end = s + strlen(s);
3961 if (s_end == s || (s_end - s) > 4000)
3962 Perl_croak(aTHX_ "Very long #! line");
3963 /* Allow more than a single space after #! */
3964 while (isSPACE(*s)) s++;
3965 /* Sanity check on buffer end */
3966 while ((*s) && !isSPACE(*s)) s++;
3967 for (s2 = s; (s2 > linestr &&
3968 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3969 || s2[-1] == '-')); s2--) ;
3970 /* Sanity check on buffer start */
3971 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3972 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3973 Perl_croak(aTHX_ "Not a perl script");
3974 while (*s == ' ' || *s == '\t') s++;
3976 * #! arg must be what we saw above. They can invoke it by
3977 * mentioning suidperl explicitly, but they may not add any strange
3978 * arguments beyond what #! says if they do invoke suidperl that way.
3981 * The way validarg was set up, we rely on the kernel to start
3982 * scripts with argv[1] set to contain all #! line switches (the
3986 * Check that we got all the arguments listed in the #! line (not
3987 * just that there are no extraneous arguments). Might not matter
3988 * much, as switches from #! line seem to be acted upon (also), and
3989 * so may be checked and trapped in perl. But, security checks must
3990 * be done in suidperl and not deferred to perl. Note that suidperl
3991 * does not get around to parsing (and checking) the switches on
3992 * the #! line (but execs perl sooner).
3993 * Allow (require) a trailing newline (which may be of two
3994 * characters on some architectures?) (but no other trailing
3997 len = strlen(validarg);
3998 if (strEQ(validarg," PHOOEY ") ||
3999 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4000 !((s_end - s) == len+1
4001 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4002 Perl_croak(aTHX_ "Args must match #! line");
4005 if (PL_fdscript < 0 &&
4006 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4007 PL_euid == PL_statbuf.st_uid)
4009 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4010 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4011 #endif /* IAMSUID */
4013 if (PL_fdscript < 0 &&
4014 PL_euid) { /* oops, we're not the setuid root perl */
4016 * When root runs a setuid script, we do not go through the same
4017 * steps of execing sperl and then perl with fd scripts, but
4018 * simply set up UIDs within the same perl invocation; so do
4019 * not have the same checks (on options, whatever) that we have
4020 * for plain users. No problem really: would have to be a script
4021 * that does not actually work for plain users; and if root is
4022 * foolish and can be persuaded to run such an unsafe script, he
4023 * might run also non-setuid ones, and deserves what he gets.
4025 * Or, we might drop the PL_euid check above (and rely just on
4026 * PL_fdscript to avoid loops), and do the execs
4032 * Pass fd script to suidperl.
4033 * Exec suidperl, substituting fd script for scriptname.
4034 * Pass script name as "subdir" of fd, which perl will grok;
4035 * in fact will use that to distinguish this from "normal"
4036 * usage, see comments above.
4038 PerlIO_rewind(PL_rsfp);
4039 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4040 /* PSz 27 Feb 04 Sanity checks on scriptname */
4041 if ((!scriptname) || (!*scriptname) ) {
4042 Perl_croak(aTHX_ "No setuid script name\n");
4044 if (*scriptname == '-') {
4045 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4046 /* Or we might confuse it with an option when replacing
4047 * name in argument list, below (though we do pointer, not
4048 * string, comparisons).
4051 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4052 if (!PL_origargv[which]) {
4053 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4055 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4056 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4057 #if defined(HAS_FCNTL) && defined(F_SETFD)
4058 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4061 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4062 (int)PERL_REVISION, (int)PERL_VERSION,
4063 (int)PERL_SUBVERSION), PL_origargv);
4065 #endif /* IAMSUID */
4066 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4069 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4071 * This seems back to front: we try HAS_SETEGID first; if not available
4072 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4073 * in the sense that we only want to set EGID; but are there any machines
4074 * with either of the latter, but not the former? Same with UID, later.
4077 (void)setegid(PL_statbuf.st_gid);
4080 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4082 #ifdef HAS_SETRESGID
4083 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4085 PerlProc_setgid(PL_statbuf.st_gid);
4089 if (PerlProc_getegid() != PL_statbuf.st_gid)
4090 Perl_croak(aTHX_ "Can't do setegid!\n");
4092 if (PL_statbuf.st_mode & S_ISUID) {
4093 if (PL_statbuf.st_uid != PL_euid)
4095 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4098 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4100 #ifdef HAS_SETRESUID
4101 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4103 PerlProc_setuid(PL_statbuf.st_uid);
4107 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4108 Perl_croak(aTHX_ "Can't do seteuid!\n");
4110 else if (PL_uid) { /* oops, mustn't run as root */
4112 (void)seteuid((Uid_t)PL_uid);
4115 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4117 #ifdef HAS_SETRESUID
4118 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4120 PerlProc_setuid((Uid_t)PL_uid);
4124 if (PerlProc_geteuid() != PL_uid)
4125 Perl_croak(aTHX_ "Can't do seteuid!\n");
4128 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4129 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4132 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4133 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4134 else if (PL_fdscript < 0 || PL_suidscript != 1)
4135 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4136 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4138 /* PSz 16 Sep 03 Keep neat error message */
4139 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4142 /* We absolutely must clear out any saved ids here, so we */
4143 /* exec the real perl, substituting fd script for scriptname. */
4144 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4146 * It might be thought that using setresgid and/or setresuid (changed to
4147 * set the saved IDs) above might obviate the need to exec, and we could
4148 * go on to "do the perl thing".
4150 * Is there such a thing as "saved GID", and is that set for setuid (but
4151 * not setgid) execution like suidperl? Without exec, it would not be
4152 * cleared for setuid (but not setgid) scripts (or might need a dummy
4155 * We need suidperl to do the exact same argument checking that perl
4156 * does. Thus it cannot be very small; while it could be significantly
4157 * smaller, it is safer (simpler?) to make it essentially the same
4158 * binary as perl (but they are not identical). - Maybe could defer that
4159 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4160 * but prefer to do thorough checks in suidperl itself. Such deferral
4161 * would make suidperl security rely on perl, a design no-no.
4163 * Setuid things should be short and simple, thus easy to understand and
4164 * verify. They should do their "own thing", without influence by
4165 * attackers. It may help if their internal execution flow is fixed,
4166 * regardless of platform: it may be best to exec anyway.
4168 * Suidperl should at least be conceptually simple: a wrapper only,
4169 * never to do any real perl. Maybe we should put
4171 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4173 * into the perly bits.
4175 PerlIO_rewind(PL_rsfp);
4176 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4178 * Keep original arguments: suidperl already has fd script.
4180 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4181 /* if (!PL_origargv[which]) { */
4182 /* errno = EPERM; */
4183 /* Perl_croak(aTHX_ "Permission denied\n"); */
4185 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4186 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4187 #if defined(HAS_FCNTL) && defined(F_SETFD)
4188 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4191 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4192 (int)PERL_REVISION, (int)PERL_VERSION,
4193 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4195 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4196 #endif /* IAMSUID */
4198 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4199 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4200 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4201 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4203 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4206 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4207 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4208 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4209 /* not set-id, must be wrapped */
4217 S_find_beginning(pTHX)
4221 register const char *s2;
4222 #ifdef MACOS_TRADITIONAL
4226 /* skip forward in input to the real script? */
4229 #ifdef MACOS_TRADITIONAL
4230 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4232 while (PL_doextract || gMacPerl_AlwaysExtract) {
4233 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4234 if (!gMacPerl_AlwaysExtract)
4235 Perl_croak(aTHX_ "No Perl script found in input\n");
4237 if (PL_doextract) /* require explicit override ? */
4238 if (!OverrideExtract(PL_origfilename))
4239 Perl_croak(aTHX_ "User aborted script\n");
4241 PL_doextract = FALSE;
4243 /* Pater peccavi, file does not have #! */
4244 PerlIO_rewind(PL_rsfp);
4249 while (PL_doextract) {
4250 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4251 Perl_croak(aTHX_ "No Perl script found in input\n");
4254 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4255 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4256 PL_doextract = FALSE;
4257 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4259 while (*s == ' ' || *s == '\t') s++;
4261 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4262 || s2[-1] == '_') s2--;
4263 if (strnEQ(s2-4,"perl",4))
4264 while ((s = moreswitches(s)))
4267 #ifdef MACOS_TRADITIONAL
4268 /* We are always searching for the #!perl line in MacPerl,
4269 * so if we find it, still keep the line count correct
4270 * by counting lines we already skipped over
4272 for (; maclines > 0 ; maclines--)
4273 PerlIO_ungetc(PL_rsfp, '\n');
4277 /* gMacPerl_AlwaysExtract is false in MPW tool */
4278 } else if (gMacPerl_AlwaysExtract) {
4290 PL_uid = PerlProc_getuid();
4291 PL_euid = PerlProc_geteuid();
4292 PL_gid = PerlProc_getgid();
4293 PL_egid = PerlProc_getegid();
4295 PL_uid |= PL_gid << 16;
4296 PL_euid |= PL_egid << 16;
4298 /* Should not happen: */
4299 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4300 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4303 * Should go by suidscript, not uid!=euid: why disallow
4304 * system("ls") in scripts run from setuid things?
4305 * Or, is this run before we check arguments and set suidscript?
4306 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4307 * (We never have suidscript, can we be sure to have fdscript?)
4308 * Or must then go by UID checks? See comments in forbid_setid also.
4312 /* This is used very early in the lifetime of the program,
4313 * before even the options are parsed, so PL_tainting has
4314 * not been initialized properly. */
4316 Perl_doing_taint(int argc, char *argv[], char *envp[])
4318 #ifndef PERL_IMPLICIT_SYS
4319 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4320 * before we have an interpreter-- and the whole point of this
4321 * function is to be called at such an early stage. If you are on
4322 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4323 * "tainted because running with altered effective ids', you'll
4324 * have to add your own checks somewhere in here. The two most
4325 * known samples of 'implicitness' are Win32 and NetWare, neither
4326 * of which has much of concept of 'uids'. */
4327 int uid = PerlProc_getuid();
4328 int euid = PerlProc_geteuid();
4329 int gid = PerlProc_getgid();
4330 int egid = PerlProc_getegid();
4337 if (uid && (euid != uid || egid != gid))
4339 #endif /* !PERL_IMPLICIT_SYS */
4340 /* This is a really primitive check; environment gets ignored only
4341 * if -T are the first chars together; otherwise one gets
4342 * "Too late" message. */
4343 if ( argc > 1 && argv[1][0] == '-'
4344 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4350 S_forbid_setid(pTHX_ const char *s)
4353 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4354 if (PL_euid != PL_uid)
4355 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4356 if (PL_egid != PL_gid)
4357 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4358 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4360 * Checks for UID/GID above "wrong": why disallow
4361 * perl -e 'print "Hello\n"'
4362 * from within setuid things?? Simply drop them: replaced by
4363 * fdscript/suidscript and #ifdef IAMSUID checks below.
4365 * This may be too late for command-line switches. Will catch those on
4366 * the #! line, after finding the script name and setting up
4367 * fdscript/suidscript. Note that suidperl does not get around to
4368 * parsing (and checking) the switches on the #! line, but checks that
4369 * the two sets are identical.
4371 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4372 * instead, or would that be "too late"? (We never have suidscript, can
4373 * we be sure to have fdscript?)
4375 * Catch things with suidscript (in descendant of suidperl), even with
4376 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4377 * below; but I am paranoid.
4379 * Also see comments about root running a setuid script, elsewhere.
4381 if (PL_suidscript >= 0)
4382 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4384 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4385 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4386 #endif /* IAMSUID */
4390 Perl_init_debugger(pTHX)
4393 HV * const ostash = PL_curstash;
4395 PL_curstash = PL_debstash;
4396 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4398 AvREAL_off(PL_dbargs);
4399 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4400 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4401 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4402 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4403 sv_setiv(PL_DBsingle, 0);
4404 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4405 sv_setiv(PL_DBtrace, 0);
4406 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4407 sv_setiv(PL_DBsignal, 0);
4408 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4409 sv_setiv(PL_DBassertion, 0);
4410 PL_curstash = ostash;
4413 #ifndef STRESS_REALLOC
4414 #define REASONABLE(size) (size)
4416 #define REASONABLE(size) (1) /* unreasonable */
4420 Perl_init_stacks(pTHX)
4423 /* start with 128-item stack and 8K cxstack */
4424 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4425 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4426 PL_curstackinfo->si_type = PERLSI_MAIN;
4427 PL_curstack = PL_curstackinfo->si_stack;
4428 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4430 PL_stack_base = AvARRAY(PL_curstack);
4431 PL_stack_sp = PL_stack_base;
4432 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4434 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4437 PL_tmps_max = REASONABLE(128);
4439 Newx(PL_markstack,REASONABLE(32),I32);
4440 PL_markstack_ptr = PL_markstack;
4441 PL_markstack_max = PL_markstack + REASONABLE(32);
4445 Newx(PL_scopestack,REASONABLE(32),I32);
4446 PL_scopestack_ix = 0;
4447 PL_scopestack_max = REASONABLE(32);
4449 Newx(PL_savestack,REASONABLE(128),ANY);
4450 PL_savestack_ix = 0;
4451 PL_savestack_max = REASONABLE(128);
4460 while (PL_curstackinfo->si_next)
4461 PL_curstackinfo = PL_curstackinfo->si_next;
4462 while (PL_curstackinfo) {
4463 PERL_SI *p = PL_curstackinfo->si_prev;
4464 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4465 Safefree(PL_curstackinfo->si_cxstack);
4466 Safefree(PL_curstackinfo);
4467 PL_curstackinfo = p;
4469 Safefree(PL_tmps_stack);
4470 Safefree(PL_markstack);
4471 Safefree(PL_scopestack);
4472 Safefree(PL_savestack);
4482 lex_start(PL_linestr);
4484 PL_subname = newSVpvs("main");
4488 S_init_predump_symbols(pTHX)
4494 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4495 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4496 GvMULTI_on(PL_stdingv);
4497 io = GvIOp(PL_stdingv);
4498 IoTYPE(io) = IoTYPE_RDONLY;
4499 IoIFP(io) = PerlIO_stdin();
4500 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4502 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4504 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4507 IoTYPE(io) = IoTYPE_WRONLY;
4508 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4510 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4512 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4514 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4515 GvMULTI_on(PL_stderrgv);
4516 io = GvIOp(PL_stderrgv);
4517 IoTYPE(io) = IoTYPE_WRONLY;
4518 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4519 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4521 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4523 PL_statname = newSV(0); /* last filename we did stat on */
4525 Safefree(PL_osname);
4526 PL_osname = savepv(OSNAME);
4530 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4533 argc--,argv++; /* skip name of script */
4534 if (PL_doswitches) {
4535 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4539 if (argv[0][1] == '-' && !argv[0][2]) {
4543 if ((s = strchr(argv[0], '='))) {
4544 const char *const start_name = argv[0] + 1;
4545 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4546 TRUE, SVt_PV)), s + 1);
4549 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4552 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4553 GvMULTI_on(PL_argvgv);
4554 (void)gv_AVadd(PL_argvgv);
4555 av_clear(GvAVn(PL_argvgv));
4556 for (; argc > 0; argc--,argv++) {
4557 SV * const sv = newSVpv(argv[0],0);
4558 av_push(GvAVn(PL_argvgv),sv);
4559 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4560 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4563 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4564 (void)sv_utf8_decode(sv);
4570 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4575 PL_toptarget = newSV(0);
4576 sv_upgrade(PL_toptarget, SVt_PVFM);
4577 sv_setpvn(PL_toptarget, "", 0);
4578 PL_bodytarget = newSV(0);
4579 sv_upgrade(PL_bodytarget, SVt_PVFM);
4580 sv_setpvn(PL_bodytarget, "", 0);
4581 PL_formtarget = PL_bodytarget;
4585 init_argv_symbols(argc,argv);
4587 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4588 #ifdef MACOS_TRADITIONAL
4589 /* $0 is not majick on a Mac */
4590 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4592 sv_setpv(GvSV(tmpgv),PL_origfilename);
4593 magicname("0", "0", 1);
4596 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4598 GvMULTI_on(PL_envgv);
4599 hv = GvHVn(PL_envgv);
4600 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4602 #ifdef USE_ENVIRON_ARRAY
4603 /* Note that if the supplied env parameter is actually a copy
4604 of the global environ then it may now point to free'd memory
4605 if the environment has been modified since. To avoid this
4606 problem we treat env==NULL as meaning 'use the default'
4611 # ifdef USE_ITHREADS
4612 && PL_curinterp == aTHX
4616 environ[0] = Nullch;
4619 char** origenv = environ;
4622 for (; *env; env++) {
4623 if (!(s = strchr(*env,'=')) || s == *env)
4625 #if defined(MSDOS) && !defined(DJGPP)
4630 sv = newSVpv(s+1, 0);
4631 (void)hv_store(hv, *env, s - *env, sv, 0);
4634 if (origenv != environ) {
4635 /* realloc has shifted us */
4636 env = (env - origenv) + environ;
4641 #endif /* USE_ENVIRON_ARRAY */
4642 #endif /* !PERL_MICRO */
4645 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4646 SvREADONLY_off(GvSV(tmpgv));
4647 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4648 SvREADONLY_on(GvSV(tmpgv));
4650 #ifdef THREADS_HAVE_PIDS
4651 PL_ppid = (IV)getppid();
4654 /* touch @F array to prevent spurious warnings 20020415 MJD */
4656 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4658 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4659 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4660 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4664 S_init_perllib(pTHX)
4670 s = PerlEnv_getenv("PERL5LIB");
4672 * It isn't possible to delete an environment variable with
4673 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4674 * case we treat PERL5LIB as undefined if it has a zero-length value.
4676 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4677 if (s && *s != '\0')
4681 incpush(s, TRUE, TRUE, TRUE, FALSE);
4683 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4685 /* Treat PERL5?LIB as a possible search list logical name -- the
4686 * "natural" VMS idiom for a Unix path string. We allow each
4687 * element to be a set of |-separated directories for compatibility.
4691 if (my_trnlnm("PERL5LIB",buf,0))
4692 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4694 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4698 /* Use the ~-expanded versions of APPLLIB (undocumented),
4699 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4702 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4706 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4708 #ifdef MACOS_TRADITIONAL
4711 SV * privdir = newSV(0);
4712 char * macperl = PerlEnv_getenv("MACPERL");
4717 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4718 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4719 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4720 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4721 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4722 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4724 SvREFCNT_dec(privdir);
4727 incpush(":", FALSE, FALSE, TRUE, FALSE);
4730 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4733 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4735 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4739 /* sitearch is always relative to sitelib on Windows for
4740 * DLL-based path intuition to work correctly */
4741 # if !defined(WIN32)
4742 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4748 /* this picks up sitearch as well */
4749 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4751 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4755 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4756 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4759 #ifdef PERL_VENDORARCH_EXP
4760 /* vendorarch is always relative to vendorlib on Windows for
4761 * DLL-based path intuition to work correctly */
4762 # if !defined(WIN32)
4763 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4767 #ifdef PERL_VENDORLIB_EXP
4769 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4771 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4775 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4776 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4779 #ifdef PERL_OTHERLIBDIRS
4780 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4784 incpush(".", FALSE, FALSE, TRUE, FALSE);
4785 #endif /* MACOS_TRADITIONAL */
4788 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4789 # define PERLLIB_SEP ';'
4792 # define PERLLIB_SEP '|'
4794 # if defined(MACOS_TRADITIONAL)
4795 # define PERLLIB_SEP ','
4797 # define PERLLIB_SEP ':'
4801 #ifndef PERLLIB_MANGLE
4802 # define PERLLIB_MANGLE(s,n) (s)
4805 /* Push a directory onto @INC if it exists.
4806 Generate a new SV if we do this, to save needing to copy the SV we push
4809 S_incpush_if_exists(pTHX_ SV *dir)
4813 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4814 S_ISDIR(tmpstatbuf.st_mode)) {
4815 av_push(GvAVn(PL_incgv), dir);
4822 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4826 SV *subdir = Nullsv;
4827 const char *p = dir;
4832 if (addsubdirs || addoldvers) {
4836 /* Break at all separators */
4838 SV *libdir = newSV(0);
4841 /* skip any consecutive separators */
4843 while ( *p == PERLLIB_SEP ) {
4844 /* Uncomment the next line for PATH semantics */
4845 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4850 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4851 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4856 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4857 p = Nullch; /* break out */
4859 #ifdef MACOS_TRADITIONAL
4860 if (!strchr(SvPVX(libdir), ':')) {
4863 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4865 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4866 sv_catpvs(libdir, ":");
4869 /* Do the if() outside the #ifdef to avoid warnings about an unused
4872 #ifdef PERL_RELOCATABLE_INC
4874 * Relocatable include entries are marked with a leading .../
4877 * 0: Remove that leading ".../"
4878 * 1: Remove trailing executable name (anything after the last '/')
4879 * from the perl path to give a perl prefix
4881 * While the @INC element starts "../" and the prefix ends with a real
4882 * directory (ie not . or ..) chop that real directory off the prefix
4883 * and the leading "../" from the @INC element. ie a logical "../"
4885 * Finally concatenate the prefix and the remainder of the @INC element
4886 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4887 * generates /usr/local/lib/perl5
4889 const char *libpath = SvPVX(libdir);
4890 STRLEN libpath_len = SvCUR(libdir);
4891 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4893 SV * const caret_X = get_sv("\030", 0);
4894 /* Going to use the SV just as a scratch buffer holding a C
4900 /* $^X is *the* source of taint if tainting is on, hence
4901 SvPOK() won't be true. */
4903 assert(SvPOKp(caret_X));
4904 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4905 /* Firstly take off the leading .../
4906 If all else fail we'll do the paths relative to the current
4908 sv_chop(libdir, libpath + 4);
4909 /* Don't use SvPV as we're intentionally bypassing taining,
4910 mortal copies that the mg_get of tainting creates, and
4911 corruption that seems to come via the save stack.
4912 I guess that the save stack isn't correctly set up yet. */
4913 libpath = SvPVX(libdir);
4914 libpath_len = SvCUR(libdir);
4916 /* This would work more efficiently with memrchr, but as it's
4917 only a GNU extension we'd need to probe for it and
4918 implement our own. Not hard, but maybe not worth it? */
4920 prefix = SvPVX(prefix_sv);
4921 lastslash = strrchr(prefix, '/');
4923 /* First time in with the *lastslash = '\0' we just wipe off
4924 the trailing /perl from (say) /usr/foo/bin/perl
4928 while ((*lastslash = '\0'), /* Do that, come what may. */
4929 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4930 && (lastslash = strrchr(prefix, '/')))) {
4931 if (lastslash[1] == '\0'
4932 || (lastslash[1] == '.'
4933 && (lastslash[2] == '/' /* ends "/." */
4934 || (lastslash[2] == '/'
4935 && lastslash[3] == '/' /* or "/.." */
4937 /* Prefix ends "/" or "/." or "/..", any of which
4938 are fishy, so don't do any more logical cleanup.
4942 /* Remove leading "../" from path */
4945 /* Next iteration round the loop removes the last
4946 directory name from prefix by writing a '\0' in
4947 the while clause. */
4949 /* prefix has been terminated with a '\0' to the correct
4950 length. libpath points somewhere into the libdir SV.
4951 We need to join the 2 with '/' and drop the result into
4953 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4954 SvREFCNT_dec(libdir);
4955 /* And this is the new libdir. */
4958 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4959 /* Need to taint reloccated paths if running set ID */
4960 SvTAINTED_on(libdir);
4963 SvREFCNT_dec(prefix_sv);
4968 * BEFORE pushing libdir onto @INC we may first push version- and
4969 * archname-specific sub-directories.
4971 if (addsubdirs || addoldvers) {
4972 #ifdef PERL_INC_VERSION_LIST
4973 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4974 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4975 const char * const *incver;
4981 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4983 while (unix[len-1] == '/') len--; /* Cosmetic */
4984 sv_usepvn(libdir,unix,len);
4987 PerlIO_printf(Perl_error_log,
4988 "Failed to unixify @INC element \"%s\"\n",
4992 #ifdef MACOS_TRADITIONAL
4993 #define PERL_AV_SUFFIX_FMT ""
4994 #define PERL_ARCH_FMT "%s:"
4995 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4997 #define PERL_AV_SUFFIX_FMT "/"
4998 #define PERL_ARCH_FMT "/%s"
4999 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5001 /* .../version/archname if -d .../version/archname */
5002 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5004 (int)PERL_REVISION, (int)PERL_VERSION,
5005 (int)PERL_SUBVERSION, ARCHNAME);
5006 subdir = S_incpush_if_exists(aTHX_ subdir);
5008 /* .../version if -d .../version */
5009 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5010 (int)PERL_REVISION, (int)PERL_VERSION,
5011 (int)PERL_SUBVERSION);
5012 subdir = S_incpush_if_exists(aTHX_ subdir);
5014 /* .../archname if -d .../archname */
5015 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5016 subdir = S_incpush_if_exists(aTHX_ subdir);
5020 #ifdef PERL_INC_VERSION_LIST
5022 for (incver = incverlist; *incver; incver++) {
5023 /* .../xxx if -d .../xxx */
5024 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5025 subdir = S_incpush_if_exists(aTHX_ subdir);
5031 /* finally push this lib directory on the end of @INC */
5032 av_push(GvAVn(PL_incgv), libdir);
5035 assert (SvREFCNT(subdir) == 1);
5036 SvREFCNT_dec(subdir);
5040 #ifdef USE_5005THREADS
5041 STATIC struct perl_thread *
5042 S_init_main_thread(pTHX)
5044 #if !defined(PERL_IMPLICIT_CONTEXT)
5045 struct perl_thread *thr;
5049 Newxz(thr, 1, struct perl_thread);
5050 PL_curcop = &PL_compiling;
5051 thr->interp = PERL_GET_INTERP;
5052 thr->cvcache = newHV();
5053 thr->threadsv = newAV();
5054 /* thr->threadsvp is set when find_threadsv is called */
5055 thr->specific = newAV();
5056 thr->flags = THRf_R_JOINABLE;
5057 MUTEX_INIT(&thr->mutex);
5058 /* Handcraft thrsv similarly to mess_sv */
5059 Newx(PL_thrsv, 1, SV);
5061 SvFLAGS(PL_thrsv) = SVt_PV;
5062 SvANY(PL_thrsv) = (void*)xpv;
5063 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5064 SvPV_set(PL_thrsvr, (char*)thr);
5065 SvCUR_set(PL_thrsv, sizeof(thr));
5066 SvLEN_set(PL_thrsv, sizeof(thr));
5067 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5068 thr->oursv = PL_thrsv;
5069 PL_chopset = " \n-";
5072 MUTEX_LOCK(&PL_threads_mutex);
5078 MUTEX_UNLOCK(&PL_threads_mutex);
5080 #ifdef HAVE_THREAD_INTERN
5081 Perl_init_thread_intern(thr);
5084 #ifdef SET_THREAD_SELF
5085 SET_THREAD_SELF(thr);
5087 thr->self = pthread_self();
5088 #endif /* SET_THREAD_SELF */
5092 * These must come after the thread self setting
5093 * because sv_setpvn does SvTAINT and the taint
5094 * fields thread selfness being set.
5096 PL_toptarget = newSV(0);
5097 sv_upgrade(PL_toptarget, SVt_PVFM);
5098 sv_setpvn(PL_toptarget, "", 0);
5099 PL_bodytarget = newSV(0);
5100 sv_upgrade(PL_bodytarget, SVt_PVFM);
5101 sv_setpvn(PL_bodytarget, "", 0);
5102 PL_formtarget = PL_bodytarget;
5103 thr->errsv = newSVpvs("");
5104 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5107 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5108 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5109 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5110 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5111 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5112 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5114 PL_reginterp_cnt = 0;
5118 #endif /* USE_5005THREADS */
5121 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5125 const line_t oldline = CopLINE(PL_curcop);
5131 while (av_len(paramList) >= 0) {
5132 cv = (CV*)av_shift(paramList);
5134 if (paramList == PL_beginav) {
5135 /* save PL_beginav for compiler */
5136 if (! PL_beginav_save)
5137 PL_beginav_save = newAV();
5138 av_push(PL_beginav_save, (SV*)cv);
5140 else if (paramList == PL_checkav) {
5141 /* save PL_checkav for compiler */
5142 if (! PL_checkav_save)
5143 PL_checkav_save = newAV();
5144 av_push(PL_checkav_save, (SV*)cv);
5154 (void)SvPV_const(atsv, len);
5156 PL_curcop = &PL_compiling;
5157 CopLINE_set(PL_curcop, oldline);
5158 if (paramList == PL_beginav)
5159 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5161 Perl_sv_catpvf(aTHX_ atsv,
5162 "%s failed--call queue aborted",
5163 paramList == PL_checkav ? "CHECK"
5164 : paramList == PL_initav ? "INIT"
5166 while (PL_scopestack_ix > oldscope)
5169 Perl_croak(aTHX_ "%"SVf"", atsv);
5176 /* my_exit() was called */
5177 while (PL_scopestack_ix > oldscope)
5180 PL_curstash = PL_defstash;
5181 PL_curcop = &PL_compiling;
5182 CopLINE_set(PL_curcop, oldline);
5184 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5185 if (paramList == PL_beginav)
5186 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5188 Perl_croak(aTHX_ "%s failed--call queue aborted",
5189 paramList == PL_checkav ? "CHECK"
5190 : paramList == PL_initav ? "INIT"
5197 PL_curcop = &PL_compiling;
5198 CopLINE_set(PL_curcop, oldline);
5201 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5210 S_call_list_body(pTHX_ CV *cv)
5213 PUSHMARK(PL_stack_sp);
5214 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5219 Perl_my_exit(pTHX_ U32 status)
5222 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5223 thr, (unsigned long) status));
5232 STATUS_EXIT_SET(status);
5239 Perl_my_failure_exit(pTHX)
5243 /* We have been called to fall on our sword. The desired exit code
5244 * should be already set in STATUS_UNIX, but could be shifted over
5245 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5248 * If an error code has not been set, then force the issue.
5250 if (MY_POSIX_EXIT) {
5252 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5253 * the exit code when there isn't an error.
5256 if (STATUS_UNIX == 0)
5257 STATUS_UNIX_EXIT_SET(255);
5259 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5261 /* The exit code could have been set by $? or vmsish which
5262 * means that it may not be fatal. So convert
5263 * success/warning codes to fatal.
5265 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5266 STATUS_UNIX_EXIT_SET(255);
5270 /* Traditionally Perl on VMS always expects a Fatal Error. */
5271 if (vaxc$errno & 1) {
5273 /* So force success status to failure */
5274 if (STATUS_NATIVE & 1)
5279 STATUS_UNIX = EINTR; /* In case something cares */
5284 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5286 /* Encode the severity code */
5287 severity = STATUS_NATIVE & STS$M_SEVERITY;
5288 STATUS_UNIX = (severity ? severity : 1) << 8;
5290 /* Perl expects this to be a fatal error */
5291 if (severity != STS$K_SEVERE)
5300 STATUS_UNIX_SET(errno);
5302 exitstatus = STATUS_UNIX >> 8;
5303 if (exitstatus & 255)
5304 STATUS_UNIX_SET(exitstatus);
5306 STATUS_UNIX_SET(255);
5313 S_my_exit_jump(pTHX)
5316 register PERL_CONTEXT *cx;
5321 SvREFCNT_dec(PL_e_script);
5322 PL_e_script = Nullsv;
5325 POPSTACK_TO(PL_mainstack);
5326 if (cxstack_ix >= 0) {
5329 POPBLOCK(cx,PL_curpm);
5334 PERL_UNUSED_VAR(gimme);
5335 PERL_UNUSED_VAR(newsp);
5339 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5342 const char * const p = SvPVX_const(PL_e_script);
5343 const char *nl = strchr(p, '\n');
5345 PERL_UNUSED_ARG(idx);
5346 PERL_UNUSED_ARG(maxlen);
5348 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5350 filter_del(read_e_script);
5353 sv_catpvn(buf_sv, p, nl-p);
5354 sv_chop(PL_e_script, nl);
5360 * c-indentation-style: bsd
5362 * indent-tabs-mode: t
5365 * ex: set ts=8 sts=4 sw=4 noet: