3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
141 /* This reference ensure that the mathoms are linked with perl */
142 void Perl_mathoms_ref() {
143 extern void Perl_mathoms();
149 S_init_tls_and_interp(PerlInterpreter *my_perl)
153 PERL_SET_INTERP(my_perl);
154 #if defined(USE_ITHREADS)
157 PERL_SET_THX(my_perl);
159 MUTEX_INIT(&PL_dollarzero_mutex);
163 PERL_SET_THX(my_perl);
167 #ifdef PERL_IMPLICIT_SYS
169 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
170 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
171 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
172 struct IPerlDir* ipD, struct IPerlSock* ipS,
173 struct IPerlProc* ipP)
175 PerlInterpreter *my_perl;
176 /* Newx() needs interpreter, so call malloc() instead */
177 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
178 S_init_tls_and_interp(my_perl);
179 Zero(my_perl, 1, PerlInterpreter);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 #endif /* PERL_IMPLICIT_SYS */
218 =for apidoc perl_construct
220 Initializes a new Perl interpreter. See L<perlembed>.
226 perl_construct(pTHXx)
229 PERL_UNUSED_ARG(my_perl);
232 PL_perl_destruct_level = 1;
234 if (PL_perl_destruct_level > 0)
237 /* Init the real globals (and main thread)? */
239 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
241 PL_linestr = NEWSV(65,79);
242 sv_upgrade(PL_linestr,SVt_PVIV);
244 if (!SvREADONLY(&PL_sv_undef)) {
245 /* set read-only and try to insure than we wont see REFCNT==0
248 SvREADONLY_on(&PL_sv_undef);
249 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_no,PL_No);
252 /* value lookup in void context - happens to have the side effect
253 of caching the numeric forms. */
256 SvREADONLY_on(&PL_sv_no);
257 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
259 sv_setpv(&PL_sv_yes,PL_Yes);
262 SvREADONLY_on(&PL_sv_yes);
263 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
265 SvREADONLY_on(&PL_sv_placeholder);
266 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
269 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
270 #ifdef PERL_USES_PL_PIDSTATUS
271 PL_pidstatus = newHV();
275 PL_rs = newSVpvn("\n", 1);
280 PL_lex_state = LEX_NOTPARSING;
286 SET_NUMERIC_STANDARD();
288 #if defined(LOCAL_PATCH_COUNT)
289 PL_localpatches = local_patches; /* For possible -v */
292 #ifdef HAVE_INTERP_INTERN
296 PerlIO_init(aTHX); /* Hook to IO system */
298 PL_fdpid = newAV(); /* for remembering popen pids by fd */
299 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
300 PL_errors = newSVpvn("",0);
301 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
302 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
303 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
305 PL_regex_padav = newAV();
306 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
307 PL_regex_pad = AvARRAY(PL_regex_padav);
309 #ifdef USE_REENTRANT_API
310 Perl_reentrant_init(aTHX);
313 /* Note that strtab is a rather special HV. Assumptions are made
314 about not iterating on it, and not adding tie magic to it.
315 It is properly deallocated in perl_destruct() */
318 HvSHAREKEYS_off(PL_strtab); /* mandatory */
319 hv_ksplit(PL_strtab, 512);
321 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
322 _dyld_lookup_and_bind
323 ("__environ", (unsigned long *) &environ_pointer, NULL);
327 # ifdef USE_ENVIRON_ARRAY
328 PL_origenviron = environ;
332 /* Use sysconf(_SC_CLK_TCK) if available, if not
333 * available or if the sysconf() fails, use the HZ.
334 * BeOS has those, but returns the wrong value.
335 * The HZ if not originally defined has been by now
336 * been defined as CLK_TCK, if available. */
337 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
338 PL_clocktick = sysconf(_SC_CLK_TCK);
339 if (PL_clocktick <= 0)
343 PL_stashcache = newHV();
345 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
346 (int)PERL_VERSION, (int)PERL_SUBVERSION);
349 if (!PL_mmap_page_size) {
350 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
352 SETERRNO(0, SS_NORMAL);
354 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
356 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
358 if ((long) PL_mmap_page_size < 0) {
360 SV * const error = ERRSV;
361 (void) SvUPGRADE(error, SVt_PV);
362 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
365 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
369 # ifdef HAS_GETPAGESIZE
370 PL_mmap_page_size = getpagesize();
372 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
373 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
377 if (PL_mmap_page_size <= 0)
378 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
379 (IV) PL_mmap_page_size);
381 #endif /* HAS_MMAP */
383 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
384 PL_timesbase.tms_utime = 0;
385 PL_timesbase.tms_stime = 0;
386 PL_timesbase.tms_cutime = 0;
387 PL_timesbase.tms_cstime = 0;
394 =for apidoc nothreadhook
396 Stub that provides thread hook for perl_destruct when there are
403 Perl_nothreadhook(pTHX)
408 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
410 Perl_dump_sv_child(pTHX_ SV *sv)
413 const int sock = PL_dumper_fd;
414 const int debug_fd = PerlIO_fileno(Perl_debug_log);
415 union control_un control;
418 struct cmsghdr *cmptr;
420 unsigned char buffer[256];
422 if(sock == -1 || debug_fd == -1)
425 PerlIO_flush(Perl_debug_log);
427 /* All these shenanigans are to pass a file descriptor over to our child for
428 it to dump out to. We can't let it hold open the file descriptor when it
429 forks, as the file descriptor it will dump to can turn out to be one end
430 of pipe that some other process will wait on for EOF. (So as it would
431 be open, the wait would be forever. */
433 msg.msg_control = control.control;
434 msg.msg_controllen = sizeof(control.control);
435 /* We're a connected socket so we don't need a destination */
441 cmptr = CMSG_FIRSTHDR(&msg);
442 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
443 cmptr->cmsg_level = SOL_SOCKET;
444 cmptr->cmsg_type = SCM_RIGHTS;
445 *((int *)CMSG_DATA(cmptr)) = 1;
447 vec[0].iov_base = (void*)&sv;
448 vec[0].iov_len = sizeof(sv);
449 got = sendmsg(sock, &msg, 0);
452 perror("Debug leaking scalars parent sendmsg failed");
455 if(got < sizeof(sv)) {
456 perror("Debug leaking scalars parent short sendmsg");
460 /* Return protocol is
462 unsigned char: length of location string (0 for empty)
463 unsigned char*: string (not terminated)
465 vec[0].iov_base = (void*)&returned_errno;
466 vec[0].iov_len = sizeof(returned_errno);
467 vec[1].iov_base = buffer;
470 got = readv(sock, vec, 2);
473 perror("Debug leaking scalars parent read failed");
474 PerlIO_flush(PerlIO_stderr());
477 if(got < sizeof(returned_errno) + 1) {
478 perror("Debug leaking scalars parent short read");
479 PerlIO_flush(PerlIO_stderr());
484 got = read(sock, buffer + 1, *buffer);
486 perror("Debug leaking scalars parent read 2 failed");
487 PerlIO_flush(PerlIO_stderr());
492 perror("Debug leaking scalars parent short read 2");
493 PerlIO_flush(PerlIO_stderr());
498 if (returned_errno || *buffer) {
499 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
500 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
501 returned_errno, strerror(returned_errno));
507 =for apidoc perl_destruct
509 Shuts down a Perl interpreter. See L<perlembed>.
518 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
520 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
524 PERL_UNUSED_ARG(my_perl);
526 /* wait for all pseudo-forked children to finish */
527 PERL_WAIT_FOR_CHILDREN;
529 destruct_level = PL_perl_destruct_level;
532 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
534 const int i = atoi(s);
535 if (destruct_level < i)
541 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
547 if (PL_endav && !PL_minus_c)
548 call_list(PL_scopestack_ix, PL_endav);
554 /* Need to flush since END blocks can produce output */
557 if (CALL_FPTR(PL_threadhook)(aTHX)) {
558 /* Threads hook has vetoed further cleanup */
562 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
563 if (destruct_level != 0) {
564 /* Fork here to create a child. Our child's job is to preserve the
565 state of scalars prior to destruction, so that we can instruct it
566 to dump any scalars that we later find have leaked.
567 There's no subtlety in this code - it assumes POSIX, and it doesn't
571 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
572 perror("Debug leaking scalars socketpair failed");
578 perror("Debug leaking scalars fork failed");
582 /* We are the child */
583 const int sock = fd[1];
584 const int debug_fd = PerlIO_fileno(Perl_debug_log);
587 /* Our success message is an integer 0, and a char 0 */
588 static const char success[sizeof(int) + 1];
592 /* We need to close all other file descriptors otherwise we end up
593 with interesting hangs, where the parent closes its end of a
594 pipe, and sits waiting for (another) child to terminate. Only
595 that child never terminates, because it never gets EOF, because
596 we also have the far end of the pipe open. We even need to
597 close the debugging fd, because sometimes it happens to be one
598 end of a pipe, and a process is waiting on the other end for
599 EOF. Normally it would be closed at some point earlier in
600 destruction, but if we happen to cause the pipe to remain open,
601 EOF never occurs, and we get an infinite hang. Hence all the
602 games to pass in a file descriptor if it's actually needed. */
604 f = sysconf(_SC_OPEN_MAX);
606 where = "sysconf failed";
617 union control_un control;
620 struct cmsghdr *cmptr;
624 msg.msg_control = control.control;
625 msg.msg_controllen = sizeof(control.control);
626 /* We're a connected socket so we don't need a source */
630 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
632 vec[0].iov_base = (void*)⌖
633 vec[0].iov_len = sizeof(target);
635 got = recvmsg(sock, &msg, 0);
640 where = "recv failed";
643 if(got < sizeof(target)) {
644 where = "short recv";
648 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
652 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
653 where = "wrong cmsg_len";
656 if(cmptr->cmsg_level != SOL_SOCKET) {
657 where = "wrong cmsg_level";
660 if(cmptr->cmsg_type != SCM_RIGHTS) {
661 where = "wrong cmsg_type";
665 got_fd = *(int*)CMSG_DATA(cmptr);
666 /* For our last little bit of trickery, put the file descriptor
667 back into Perl_debug_log, as if we never actually closed it
669 if(got_fd != debug_fd) {
670 if (dup2(got_fd, debug_fd) == -1) {
677 PerlIO_flush(Perl_debug_log);
679 got = write(sock, &success, sizeof(success));
682 where = "write failed";
685 if(got < sizeof(success)) {
686 where = "short write";
693 int send_errno = errno;
694 unsigned char length = (unsigned char) strlen(where);
695 struct iovec failure[3] = {
696 {(void*)&send_errno, sizeof(send_errno)},
698 {(void*)where, length}
700 int got = writev(sock, failure, 3);
701 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
702 in the parent if we try to read from the socketpair after the
703 child has exited, even if there was data to read.
704 So sleep a bit to give the parent a fighting chance of
707 _exit((got == -1) ? errno : 0);
711 PL_dumper_fd = fd[0];
716 /* We must account for everything. */
718 /* Destroy the main CV and syntax tree */
719 /* Do this now, because destroying ops can cause new SVs to be generated
720 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
721 PL_curcop to point to a valid op from which the filename structure
723 PL_curcop = &PL_compiling;
725 /* ensure comppad/curpad to refer to main's pad */
726 if (CvPADLIST(PL_main_cv)) {
727 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
729 op_free(PL_main_root);
730 PL_main_root = Nullop;
732 PL_main_start = Nullop;
733 SvREFCNT_dec(PL_main_cv);
737 /* Tell PerlIO we are about to tear things apart in case
738 we have layers which are using resources that should
742 PerlIO_destruct(aTHX);
744 if (PL_sv_objcount) {
746 * Try to destruct global references. We do this first so that the
747 * destructors and destructees still exist. Some sv's might remain.
748 * Non-referenced objects are on their own.
752 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
753 PL_defoutgv = Nullgv; /* may have been freed */
756 /* unhook hooks which will soon be, or use, destroyed data */
757 SvREFCNT_dec(PL_warnhook);
758 PL_warnhook = Nullsv;
759 SvREFCNT_dec(PL_diehook);
762 /* call exit list functions */
763 while (PL_exitlistlen-- > 0)
764 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
766 Safefree(PL_exitlist);
771 if (destruct_level == 0){
773 DEBUG_P(debprofdump());
775 #if defined(PERLIO_LAYERS)
776 /* No more IO - including error messages ! */
777 PerlIO_cleanup(aTHX);
780 /* The exit() function will do everything that needs doing. */
784 /* jettison our possibly duplicated environment */
785 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
786 * so we certainly shouldn't free it here
789 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
790 if (environ != PL_origenviron && !PL_use_safe_putenv
792 /* only main thread can free environ[0] contents */
793 && PL_curinterp == aTHX
799 for (i = 0; environ[i]; i++)
800 safesysfree(environ[i]);
802 /* Must use safesysfree() when working with environ. */
803 safesysfree(environ);
805 environ = PL_origenviron;
808 #endif /* !PERL_MICRO */
810 /* reset so print() ends up where we expect */
814 /* the syntax tree is shared between clones
815 * so op_free(PL_main_root) only ReREFCNT_dec's
816 * REGEXPs in the parent interpreter
817 * we need to manually ReREFCNT_dec for the clones
820 I32 i = AvFILLp(PL_regex_padav) + 1;
821 SV * const * const ary = AvARRAY(PL_regex_padav);
824 SV * const resv = ary[--i];
826 if (SvFLAGS(resv) & SVf_BREAK) {
827 /* this is PL_reg_curpm, already freed
828 * flag is set in regexec.c:S_regtry
830 SvFLAGS(resv) &= ~SVf_BREAK;
832 else if(SvREPADTMP(resv)) {
833 SvREPADTMP_off(resv);
835 else if(SvIOKp(resv)) {
836 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
841 SvREFCNT_dec(PL_regex_padav);
842 PL_regex_padav = Nullav;
846 SvREFCNT_dec((SV*) PL_stashcache);
847 PL_stashcache = NULL;
849 /* loosen bonds of global variables */
852 (void)PerlIO_close(PL_rsfp);
856 /* Filters for program text */
857 SvREFCNT_dec(PL_rsfp_filters);
858 PL_rsfp_filters = Nullav;
861 PL_preprocess = FALSE;
867 PL_doswitches = FALSE;
868 PL_dowarn = G_WARN_OFF;
869 PL_doextract = FALSE;
870 PL_sawampersand = FALSE; /* must save all match strings */
873 Safefree(PL_inplace);
875 SvREFCNT_dec(PL_patchlevel);
878 SvREFCNT_dec(PL_e_script);
879 PL_e_script = Nullsv;
884 /* magical thingies */
886 SvREFCNT_dec(PL_ofs_sv); /* $, */
889 SvREFCNT_dec(PL_ors_sv); /* $\ */
892 SvREFCNT_dec(PL_rs); /* $/ */
895 PL_multiline = 0; /* $* */
896 Safefree(PL_osname); /* $^O */
899 SvREFCNT_dec(PL_statname);
900 PL_statname = Nullsv;
903 /* defgv, aka *_ should be taken care of elsewhere */
905 /* clean up after study() */
906 SvREFCNT_dec(PL_lastscream);
907 PL_lastscream = Nullsv;
908 Safefree(PL_screamfirst);
910 Safefree(PL_screamnext);
914 Safefree(PL_efloatbuf);
915 PL_efloatbuf = Nullch;
918 /* startup and shutdown function lists */
919 SvREFCNT_dec(PL_beginav);
920 SvREFCNT_dec(PL_beginav_save);
921 SvREFCNT_dec(PL_endav);
922 SvREFCNT_dec(PL_checkav);
923 SvREFCNT_dec(PL_checkav_save);
924 SvREFCNT_dec(PL_initav);
926 PL_beginav_save = Nullav;
929 PL_checkav_save = Nullav;
932 /* shortcuts just get cleared */
938 PL_argvoutgv = Nullgv;
940 PL_stderrgv = Nullgv;
941 PL_last_in_gv = Nullgv;
946 PL_DBsingle = Nullsv;
948 PL_DBsignal = Nullsv;
949 PL_DBassertion = Nullsv;
952 PL_debstash = Nullhv;
954 SvREFCNT_dec(PL_argvout_stack);
955 PL_argvout_stack = Nullav;
957 SvREFCNT_dec(PL_modglobal);
958 PL_modglobal = Nullhv;
959 SvREFCNT_dec(PL_preambleav);
960 PL_preambleav = Nullav;
961 SvREFCNT_dec(PL_subname);
963 SvREFCNT_dec(PL_linestr);
965 #ifdef PERL_USES_PL_PIDSTATUS
966 SvREFCNT_dec(PL_pidstatus);
967 PL_pidstatus = Nullhv;
969 SvREFCNT_dec(PL_toptarget);
970 PL_toptarget = Nullsv;
971 SvREFCNT_dec(PL_bodytarget);
972 PL_bodytarget = Nullsv;
973 PL_formtarget = Nullsv;
975 /* free locale stuff */
976 #ifdef USE_LOCALE_COLLATE
977 Safefree(PL_collation_name);
978 PL_collation_name = Nullch;
981 #ifdef USE_LOCALE_NUMERIC
982 Safefree(PL_numeric_name);
983 PL_numeric_name = Nullch;
984 SvREFCNT_dec(PL_numeric_radix_sv);
985 PL_numeric_radix_sv = Nullsv;
988 /* clear utf8 character classes */
989 SvREFCNT_dec(PL_utf8_alnum);
990 SvREFCNT_dec(PL_utf8_alnumc);
991 SvREFCNT_dec(PL_utf8_ascii);
992 SvREFCNT_dec(PL_utf8_alpha);
993 SvREFCNT_dec(PL_utf8_space);
994 SvREFCNT_dec(PL_utf8_cntrl);
995 SvREFCNT_dec(PL_utf8_graph);
996 SvREFCNT_dec(PL_utf8_digit);
997 SvREFCNT_dec(PL_utf8_upper);
998 SvREFCNT_dec(PL_utf8_lower);
999 SvREFCNT_dec(PL_utf8_print);
1000 SvREFCNT_dec(PL_utf8_punct);
1001 SvREFCNT_dec(PL_utf8_xdigit);
1002 SvREFCNT_dec(PL_utf8_mark);
1003 SvREFCNT_dec(PL_utf8_toupper);
1004 SvREFCNT_dec(PL_utf8_totitle);
1005 SvREFCNT_dec(PL_utf8_tolower);
1006 SvREFCNT_dec(PL_utf8_tofold);
1007 SvREFCNT_dec(PL_utf8_idstart);
1008 SvREFCNT_dec(PL_utf8_idcont);
1009 PL_utf8_alnum = Nullsv;
1010 PL_utf8_alnumc = Nullsv;
1011 PL_utf8_ascii = Nullsv;
1012 PL_utf8_alpha = Nullsv;
1013 PL_utf8_space = Nullsv;
1014 PL_utf8_cntrl = Nullsv;
1015 PL_utf8_graph = Nullsv;
1016 PL_utf8_digit = Nullsv;
1017 PL_utf8_upper = Nullsv;
1018 PL_utf8_lower = Nullsv;
1019 PL_utf8_print = Nullsv;
1020 PL_utf8_punct = Nullsv;
1021 PL_utf8_xdigit = Nullsv;
1022 PL_utf8_mark = Nullsv;
1023 PL_utf8_toupper = Nullsv;
1024 PL_utf8_totitle = Nullsv;
1025 PL_utf8_tolower = Nullsv;
1026 PL_utf8_tofold = Nullsv;
1027 PL_utf8_idstart = Nullsv;
1028 PL_utf8_idcont = Nullsv;
1030 if (!specialWARN(PL_compiling.cop_warnings))
1031 SvREFCNT_dec(PL_compiling.cop_warnings);
1032 PL_compiling.cop_warnings = Nullsv;
1033 if (!specialCopIO(PL_compiling.cop_io))
1034 SvREFCNT_dec(PL_compiling.cop_io);
1035 PL_compiling.cop_io = Nullsv;
1036 CopFILE_free(&PL_compiling);
1037 CopSTASH_free(&PL_compiling);
1039 /* Prepare to destruct main symbol table. */
1044 SvREFCNT_dec(PL_curstname);
1045 PL_curstname = Nullsv;
1047 /* clear queued errors */
1048 SvREFCNT_dec(PL_errors);
1052 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1053 if (PL_scopestack_ix != 0)
1054 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1055 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1056 (long)PL_scopestack_ix);
1057 if (PL_savestack_ix != 0)
1058 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1059 "Unbalanced saves: %ld more saves than restores\n",
1060 (long)PL_savestack_ix);
1061 if (PL_tmps_floor != -1)
1062 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1063 (long)PL_tmps_floor + 1);
1064 if (cxstack_ix != -1)
1065 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1066 (long)cxstack_ix + 1);
1069 /* Now absolutely destruct everything, somehow or other, loops or no. */
1070 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1071 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1073 /* the 2 is for PL_fdpid and PL_strtab */
1074 while (PL_sv_count > 2 && sv_clean_all())
1077 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1078 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1079 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1080 SvFLAGS(PL_strtab) |= SVt_PVHV;
1082 AvREAL_off(PL_fdpid); /* no surviving entries */
1083 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1086 #ifdef HAVE_INTERP_INTERN
1090 /* Destruct the global string table. */
1092 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1093 * so that sv_free() won't fail on them.
1094 * Now that the global string table is using a single hunk of memory
1095 * for both HE and HEK, we either need to explicitly unshare it the
1096 * correct way, or actually free things here.
1099 const I32 max = HvMAX(PL_strtab);
1100 HE * const * const array = HvARRAY(PL_strtab);
1101 HE *hent = array[0];
1104 if (hent && ckWARN_d(WARN_INTERNAL)) {
1105 HE * const next = HeNEXT(hent);
1106 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1107 "Unbalanced string table refcount: (%ld) for \"%s\"",
1108 (long)(HeVAL(hent) - Nullsv), HeKEY(hent));
1115 hent = array[riter];
1120 HvARRAY(PL_strtab) = 0;
1121 HvTOTALKEYS(PL_strtab) = 0;
1122 HvFILL(PL_strtab) = 0;
1124 SvREFCNT_dec(PL_strtab);
1127 /* free the pointer tables used for cloning */
1128 ptr_table_free(PL_ptr_table);
1129 PL_ptr_table = (PTR_TBL_t*)NULL;
1132 /* free special SVs */
1134 SvREFCNT(&PL_sv_yes) = 0;
1135 sv_clear(&PL_sv_yes);
1136 SvANY(&PL_sv_yes) = NULL;
1137 SvFLAGS(&PL_sv_yes) = 0;
1139 SvREFCNT(&PL_sv_no) = 0;
1140 sv_clear(&PL_sv_no);
1141 SvANY(&PL_sv_no) = NULL;
1142 SvFLAGS(&PL_sv_no) = 0;
1146 for (i=0; i<=2; i++) {
1147 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1148 sv_clear(PERL_DEBUG_PAD(i));
1149 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1150 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1154 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1155 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1157 #ifdef DEBUG_LEAKING_SCALARS
1158 if (PL_sv_count != 0) {
1163 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1164 svend = &sva[SvREFCNT(sva)];
1165 for (sv = sva + 1; sv < svend; ++sv) {
1166 if (SvTYPE(sv) != SVTYPEMASK) {
1167 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1169 " refcnt=%"UVuf pTHX__FORMAT "\n"
1170 "\tallocated at %s:%d %s %s%s\n",
1171 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1172 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1174 sv->sv_debug_inpad ? "for" : "by",
1175 sv->sv_debug_optype ?
1176 PL_op_name[sv->sv_debug_optype]: "(none)",
1177 sv->sv_debug_cloned ? " (cloned)" : ""
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1180 Perl_dump_sv_child(aTHX_ sv);
1186 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1190 /* Wait for up to 4 seconds for child to terminate.
1191 This seems to be the least effort way of timing out on reaping
1193 struct timeval waitfor = {4, 0};
1194 int sock = PL_dumper_fd;
1198 FD_SET(sock, &rset);
1199 select(sock + 1, &rset, NULL, NULL, &waitfor);
1200 waitpid(child, &status, WNOHANG);
1208 #if defined(PERLIO_LAYERS)
1209 /* No more IO - including error messages ! */
1210 PerlIO_cleanup(aTHX);
1213 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1214 as currently layers use it rather than Nullsv as a marker
1215 for no arg - and will try and SvREFCNT_dec it.
1217 SvREFCNT(&PL_sv_undef) = 0;
1218 SvREADONLY_off(&PL_sv_undef);
1220 Safefree(PL_origfilename);
1221 PL_origfilename = Nullch;
1222 Safefree(PL_reg_start_tmp);
1223 PL_reg_start_tmp = (char**)NULL;
1224 PL_reg_start_tmpl = 0;
1225 Safefree(PL_reg_curpm);
1226 Safefree(PL_reg_poscache);
1227 free_tied_hv_pool();
1228 Safefree(PL_op_mask);
1229 Safefree(PL_psig_ptr);
1230 PL_psig_ptr = (SV**)NULL;
1231 Safefree(PL_psig_name);
1232 PL_psig_name = (SV**)NULL;
1233 Safefree(PL_bitcount);
1234 PL_bitcount = Nullch;
1235 Safefree(PL_psig_pend);
1236 PL_psig_pend = (int*)NULL;
1237 PL_formfeed = Nullsv;
1239 PL_tainting = FALSE;
1240 PL_taint_warn = FALSE;
1241 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1244 DEBUG_P(debprofdump());
1246 #ifdef USE_REENTRANT_API
1247 Perl_reentrant_free(aTHX);
1252 /* As the absolutely last thing, free the non-arena SV for mess() */
1255 /* we know that type == SVt_PVMG */
1257 /* it could have accumulated taint magic */
1260 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1261 moremagic = mg->mg_moremagic;
1262 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1264 Safefree(mg->mg_ptr);
1268 /* we know that type >= SVt_PV */
1269 SvPV_free(PL_mess_sv);
1270 Safefree(SvANY(PL_mess_sv));
1271 Safefree(PL_mess_sv);
1272 PL_mess_sv = Nullsv;
1278 =for apidoc perl_free
1280 Releases a Perl interpreter. See L<perlembed>.
1288 #if defined(WIN32) || defined(NETWARE)
1289 # if defined(PERL_IMPLICIT_SYS)
1291 void *host = nw_internal_host;
1293 void *host = w32_internal_host;
1295 PerlMem_free(aTHXx);
1297 nw_delete_internal_host(host);
1299 win32_delete_internal_host(host);
1302 PerlMem_free(aTHXx);
1305 PerlMem_free(aTHXx);
1309 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1310 /* provide destructors to clean up the thread key when libperl is unloaded */
1311 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1313 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1314 #pragma fini "perl_fini"
1318 #if defined(__GNUC__)
1319 __attribute__((destructor))
1329 #endif /* THREADS */
1332 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1334 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1335 PL_exitlist[PL_exitlistlen].fn = fn;
1336 PL_exitlist[PL_exitlistlen].ptr = ptr;
1340 #ifdef HAS_PROCSELFEXE
1341 /* This is a function so that we don't hold on to MAXPATHLEN
1342 bytes of stack longer than necessary
1345 S_procself_val(pTHX_ SV *sv, const char *arg0)
1347 char buf[MAXPATHLEN];
1348 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1350 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1351 includes a spurious NUL which will cause $^X to fail in system
1352 or backticks (this will prevent extensions from being built and
1353 many tests from working). readlink is not meant to add a NUL.
1354 Normal readlink works fine.
1356 if (len > 0 && buf[len-1] == '\0') {
1360 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1361 returning the text "unknown" from the readlink rather than the path
1362 to the executable (or returning an error from the readlink). Any valid
1363 path has a '/' in it somewhere, so use that to validate the result.
1364 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1366 if (len > 0 && memchr(buf, '/', len)) {
1367 sv_setpvn(sv,buf,len);
1373 #endif /* HAS_PROCSELFEXE */
1376 S_set_caret_X(pTHX) {
1377 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1379 #ifdef HAS_PROCSELFEXE
1380 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1383 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1385 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1392 =for apidoc perl_parse
1394 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1400 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1407 PERL_UNUSED_VAR(my_perl);
1409 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1412 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1413 setuid perl scripts securely.\n");
1414 #endif /* IAMSUID */
1417 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1418 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1419 * This MUST be done before any hash stores or fetches take place.
1420 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1421 * yourself, it is your responsibility to provide a good random seed!
1422 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1423 if (!PL_rehash_seed_set)
1424 PL_rehash_seed = get_hash_seed();
1426 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1428 if (s && (atoi(s) == 1))
1429 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1431 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
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 (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 - PL_origargv[0] + 1;
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 = newSVpvn("",0); /* 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;
1668 #ifdef MACOS_TRADITIONAL
1669 /* ignore -e for Dev:Pseudo argument */
1670 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1675 PL_e_script = newSVpvn("",0);
1676 filter_add(read_e_script, NULL);
1679 sv_catpv(PL_e_script, s);
1681 sv_catpv(PL_e_script, argv[1]);
1685 Perl_croak(aTHX_ "No code specified for -e");
1686 sv_catpv(PL_e_script, "\n");
1690 #ifdef USE_SITECUSTOMIZE
1696 case 'I': /* -I handled both here and in moreswitches() */
1698 if (!*++s && (s=argv[1]) != Nullch) {
1702 STRLEN len = strlen(s);
1703 const char * const p = savepvn(s, len);
1704 incpush(p, TRUE, TRUE, FALSE, FALSE);
1705 sv_catpvn(sv, "-I", 2);
1706 sv_catpvn(sv, p, len);
1707 sv_catpvn(sv, " ", 1);
1711 Perl_croak(aTHX_ "No directory specified for -I");
1715 PL_preprocess = TRUE;
1728 PL_preambleav = newAV();
1729 av_push(PL_preambleav,
1730 newSVpv("use Config;",0));
1734 opts_prog = newSVpv("print Config::myconfig(),",0);
1736 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1738 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1740 opts = SvCUR(opts_prog);
1742 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1746 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1747 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1749 # ifdef FAKE_THREADS
1752 # ifdef MULTIPLICITY
1758 # ifdef PERL_DONT_CREATE_GVSV
1759 " PERL_DONT_CREATE_GVSV"
1761 # ifdef PERL_GLOBAL_STRUCT
1762 " PERL_GLOBAL_STRUCT"
1764 # ifdef PERL_IMPLICIT_CONTEXT
1765 " PERL_IMPLICIT_CONTEXT"
1767 # ifdef PERL_IMPLICIT_SYS
1768 " PERL_IMPLICIT_SYS"
1770 # ifdef PERL_MALLOC_WRAP
1773 # ifdef PERL_NEED_APPCTX
1776 # ifdef PERL_NEED_TIMESBASE
1777 " PERL_NEED_TIMESBASE"
1779 # ifdef PERL_OLD_COPY_ON_WRITE
1780 " PERL_OLD_COPY_ON_WRITE"
1782 # ifdef PERL_USE_SAFE_PUTENV
1783 " PERL_USE_SAFE_PUTENV"
1785 #ifdef PERL_USES_PL_PIDSTATUS
1786 " PERL_USES_PL_PIDSTATUS"
1788 # ifdef PL_OP_SLAB_ALLOC
1791 # ifdef SPRINTF_RETURNS_STRLEN
1792 " SPRINTF_RETURNS_STRLEN"
1794 # ifdef THREADS_HAVE_PIDS
1795 " THREADS_HAVE_PIDS"
1797 # ifdef USE_5005THREADS
1800 # ifdef USE_64_BIT_ALL
1803 # ifdef USE_64_BIT_INT
1806 # ifdef USE_ITHREADS
1809 # ifdef USE_LARGE_FILES
1812 # ifdef USE_LONG_DOUBLE
1818 # ifdef USE_REENTRANT_API
1819 " USE_REENTRANT_API"
1824 # ifdef USE_SITECUSTOMIZE
1825 " USE_SITECUSTOMIZE"
1832 while (SvCUR(opts_prog) > opts+76) {
1833 /* find last space after "options: " and before col 76
1837 char * const pv = SvPV_nolen(opts_prog);
1838 const char c = pv[opts+76];
1840 space = strrchr(pv+opts+26, ' ');
1842 if (!space) break; /* "Can't happen" */
1844 /* break the line before that space */
1847 sv_insert(opts_prog, opts, 0,
1851 sv_catpv(opts_prog,"\\n\",");
1853 #if defined(LOCAL_PATCH_COUNT)
1854 if (LOCAL_PATCH_COUNT > 0) {
1857 "\" Locally applied patches:\\n\",");
1858 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1859 if (PL_localpatches[i])
1860 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1861 0, PL_localpatches[i], 0);
1865 Perl_sv_catpvf(aTHX_ opts_prog,
1866 "\" Built under %s\\n\"",OSNAME);
1869 Perl_sv_catpvf(aTHX_ opts_prog,
1870 ",\" Compiled at %s %s\\n\"",__DATE__,
1873 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1877 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1878 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1879 "sort grep {/^PERL/} keys %ENV; ");
1882 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1885 "print \" \\%ENV:\\n @env\\n\" if @env;"
1886 "print \" \\@INC:\\n @INC\\n\";");
1890 opts_prog = Perl_newSVpvf(aTHX_
1891 "Config::config_vars(qw%c%s%c)",
1895 av_push(PL_preambleav, opts_prog);
1896 /* don't look for script or read stdin */
1897 scriptname = BIT_BUCKET;
1901 PL_doextract = TRUE;
1909 if (!*++s || isSPACE(*s)) {
1913 /* catch use of gnu style long options */
1914 if (strEQ(s, "version")) {
1918 if (strEQ(s, "help")) {
1925 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1931 #ifndef SECURE_INTERNAL_GETENV
1934 (s = PerlEnv_getenv("PERL5OPT")))
1936 const char *popt = s;
1939 if (*s == '-' && *(s+1) == 'T') {
1940 CHECK_MALLOC_TOO_LATE_FOR('T');
1942 PL_taint_warn = FALSE;
1945 char *popt_copy = Nullch;
1958 if (!strchr("CDIMUdmtwA", *s))
1959 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1963 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1964 s = popt_copy + (s - popt);
1965 d = popt_copy + (d - popt);
1972 if( !PL_tainting ) {
1973 PL_taint_warn = TRUE;
1983 #ifdef USE_SITECUSTOMIZE
1986 PL_preambleav = newAV();
1987 av_unshift(PL_preambleav, 1);
1988 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1992 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1993 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1997 scriptname = argv[0];
2000 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2002 else if (scriptname == Nullch) {
2004 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2010 /* Set $^X early so that it can be used for relocatable paths in @INC */
2011 assert (!PL_tainted);
2013 S_set_caret_X(aTHX);
2017 open_script(scriptname,dosearch,sv);
2019 validate_suid(validarg, scriptname);
2022 #if defined(SIGCHLD) || defined(SIGCLD)
2025 # define SIGCHLD SIGCLD
2027 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2028 if (sigstate == (Sighandler_t) SIG_IGN) {
2029 if (ckWARN(WARN_SIGNAL))
2030 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2031 "Can't ignore signal CHLD, forcing to default");
2032 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2038 #ifdef MACOS_TRADITIONAL
2039 if (PL_doextract || gMacPerl_AlwaysExtract) {
2044 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2045 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2049 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2050 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2051 CvUNIQUE_on(PL_compcv);
2053 CvPADLIST(PL_compcv) = pad_new(0);
2054 #ifdef USE_5005THREADS
2055 CvOWNER(PL_compcv) = 0;
2056 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2057 MUTEX_INIT(CvMUTEXP(PL_compcv));
2058 #endif /* USE_5005THREADS */
2061 boot_core_UNIVERSAL();
2062 boot_core_xsutils();
2065 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2067 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2073 # ifdef HAS_SOCKS5_INIT
2074 socks5_init(argv[0]);
2080 init_predump_symbols();
2081 /* init_postdump_symbols not currently designed to be called */
2082 /* more than once (ENV isn't cleared first, for example) */
2083 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2085 init_postdump_symbols(argc,argv,env);
2087 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2088 * or explicitly in some platforms.
2089 * locale.c:Perl_init_i18nl10n() if the environment
2090 * look like the user wants to use UTF-8. */
2091 #if defined(__SYMBIAN32__)
2092 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2095 /* Requires init_predump_symbols(). */
2096 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2101 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2102 * and the default open disciplines. */
2103 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2104 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2106 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2107 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2108 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2110 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2111 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2112 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2114 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2115 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2116 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2117 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2118 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2121 sv_setpvn(sv, ":utf8\0:utf8", 11);
2123 sv_setpvn(sv, ":utf8\0", 6);
2126 sv_setpvn(sv, "\0:utf8", 6);
2132 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2133 if (strEQ(s, "unsafe"))
2134 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2135 else if (strEQ(s, "safe"))
2136 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2138 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2143 /* now parse the script */
2145 SETERRNO(0,SS_NORMAL);
2147 #ifdef MACOS_TRADITIONAL
2148 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2150 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2152 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2153 MacPerl_MPWFileName(PL_origfilename));
2157 if (yyparse() || PL_error_count) {
2159 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2161 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2166 CopLINE_set(PL_curcop, 0);
2167 PL_curstash = PL_defstash;
2168 PL_preprocess = FALSE;
2170 SvREFCNT_dec(PL_e_script);
2171 PL_e_script = Nullsv;
2178 SAVECOPFILE(PL_curcop);
2179 SAVECOPLINE(PL_curcop);
2180 gv_check(PL_defstash);
2187 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2188 dump_mstats("after compilation:");
2197 =for apidoc perl_run
2199 Tells a Perl interpreter to run. See L<perlembed>.
2211 PERL_UNUSED_ARG(my_perl);
2213 oldscope = PL_scopestack_ix;
2221 cxstack_ix = -1; /* start context stack again */
2223 case 0: /* normal completion */
2227 case 2: /* my_exit() */
2228 while (PL_scopestack_ix > oldscope)
2231 PL_curstash = PL_defstash;
2232 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2233 PL_endav && !PL_minus_c)
2234 call_list(oldscope, PL_endav);
2236 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2237 dump_mstats("after execution: ");
2243 POPSTACK_TO(PL_mainstack);
2246 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2258 S_run_body(pTHX_ I32 oldscope)
2260 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2261 PL_sawampersand ? "Enabling" : "Omitting"));
2263 if (!PL_restartop) {
2264 DEBUG_x(dump_all());
2267 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2269 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2273 #ifdef MACOS_TRADITIONAL
2274 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2275 (gMacPerl_ErrorFormat ? "# " : ""),
2276 MacPerl_MPWFileName(PL_origfilename));
2278 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2282 if (PERLDB_SINGLE && PL_DBsingle)
2283 sv_setiv(PL_DBsingle, 1);
2285 call_list(oldscope, PL_initav);
2291 PL_op = PL_restartop;
2295 else if (PL_main_start) {
2296 CvDEPTH(PL_main_cv) = 1;
2297 PL_op = PL_main_start;
2305 =head1 SV Manipulation Functions
2307 =for apidoc p||get_sv
2309 Returns the SV of the specified Perl scalar. If C<create> is set and the
2310 Perl variable does not exist then it will be created. If C<create> is not
2311 set and the variable does not exist then NULL is returned.
2317 Perl_get_sv(pTHX_ const char *name, I32 create)
2320 #ifdef USE_5005THREADS
2321 if (name[1] == '\0' && !isALPHA(name[0])) {
2322 PADOFFSET tmp = find_threadsv(name);
2323 if (tmp != NOT_IN_PAD)
2324 return THREADSV(tmp);
2326 #endif /* USE_5005THREADS */
2327 gv = gv_fetchpv(name, create, SVt_PV);
2334 =head1 Array Manipulation Functions
2336 =for apidoc p||get_av
2338 Returns the AV of the specified Perl array. If C<create> is set and the
2339 Perl variable does not exist then it will be created. If C<create> is not
2340 set and the variable does not exist then NULL is returned.
2346 Perl_get_av(pTHX_ const char *name, I32 create)
2348 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2357 =head1 Hash Manipulation Functions
2359 =for apidoc p||get_hv
2361 Returns the HV of the specified Perl hash. If C<create> is set and the
2362 Perl variable does not exist then it will be created. If C<create> is not
2363 set and the variable does not exist then NULL is returned.
2369 Perl_get_hv(pTHX_ const char *name, I32 create)
2371 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2380 =head1 CV Manipulation Functions
2382 =for apidoc p||get_cv
2384 Returns the CV of the specified Perl subroutine. If C<create> is set and
2385 the Perl subroutine does not exist then it will be declared (which has the
2386 same effect as saying C<sub name;>). If C<create> is not set and the
2387 subroutine does not exist then NULL is returned.
2393 Perl_get_cv(pTHX_ const char *name, I32 create)
2395 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2396 /* XXX unsafe for threads if eval_owner isn't held */
2397 /* XXX this is probably not what they think they're getting.
2398 * It has the same effect as "sub name;", i.e. just a forward
2400 if (create && !GvCVu(gv))
2401 return newSUB(start_subparse(FALSE, 0),
2402 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2410 /* Be sure to refetch the stack pointer after calling these routines. */
2414 =head1 Callback Functions
2416 =for apidoc p||call_argv
2418 Performs a callback to the specified Perl sub. See L<perlcall>.
2424 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2426 /* See G_* flags in cop.h */
2427 /* null terminated arg list */
2434 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2439 return call_pv(sub_name, flags);
2443 =for apidoc p||call_pv
2445 Performs a callback to the specified Perl sub. See L<perlcall>.
2451 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2452 /* name of the subroutine */
2453 /* See G_* flags in cop.h */
2455 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2459 =for apidoc p||call_method
2461 Performs a callback to the specified Perl method. The blessed object must
2462 be on the stack. See L<perlcall>.
2468 Perl_call_method(pTHX_ const char *methname, I32 flags)
2469 /* name of the subroutine */
2470 /* See G_* flags in cop.h */
2472 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2475 /* May be called with any of a CV, a GV, or an SV containing the name. */
2477 =for apidoc p||call_sv
2479 Performs a callback to the Perl sub whose name is in the SV. See
2486 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2487 /* See G_* flags in cop.h */
2490 LOGOP myop; /* fake syntax tree node */
2493 volatile I32 retval = 0;
2495 bool oldcatch = CATCH_GET;
2497 OP* const oldop = PL_op;
2500 if (flags & G_DISCARD) {
2505 Zero(&myop, 1, LOGOP);
2506 myop.op_next = Nullop;
2507 if (!(flags & G_NOARGS))
2508 myop.op_flags |= OPf_STACKED;
2509 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2510 (flags & G_ARRAY) ? OPf_WANT_LIST :
2515 EXTEND(PL_stack_sp, 1);
2516 *++PL_stack_sp = sv;
2518 oldscope = PL_scopestack_ix;
2520 if (PERLDB_SUB && PL_curstash != PL_debstash
2521 /* Handle first BEGIN of -d. */
2522 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2523 /* Try harder, since this may have been a sighandler, thus
2524 * curstash may be meaningless. */
2525 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2526 && !(flags & G_NODEBUG))
2527 PL_op->op_private |= OPpENTERSUB_DB;
2529 if (flags & G_METHOD) {
2530 Zero(&method_op, 1, UNOP);
2531 method_op.op_next = PL_op;
2532 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2533 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2534 PL_op = (OP*)&method_op;
2537 if (!(flags & G_EVAL)) {
2539 call_body((OP*)&myop, FALSE);
2540 retval = PL_stack_sp - (PL_stack_base + oldmark);
2541 CATCH_SET(oldcatch);
2544 myop.op_other = (OP*)&myop;
2546 /* we're trying to emulate pp_entertry() here */
2548 register PERL_CONTEXT *cx;
2549 const I32 gimme = GIMME_V;
2554 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2556 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2558 PL_in_eval = EVAL_INEVAL;
2559 if (flags & G_KEEPERR)
2560 PL_in_eval |= EVAL_KEEPERR;
2562 sv_setpvn(ERRSV,"",0);
2570 call_body((OP*)&myop, FALSE);
2571 retval = PL_stack_sp - (PL_stack_base + oldmark);
2572 if (!(flags & G_KEEPERR))
2573 sv_setpvn(ERRSV,"",0);
2579 /* my_exit() was called */
2580 PL_curstash = PL_defstash;
2583 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2584 Perl_croak(aTHX_ "Callback called exit");
2589 PL_op = PL_restartop;
2593 PL_stack_sp = PL_stack_base + oldmark;
2594 if (flags & G_ARRAY)
2598 *++PL_stack_sp = &PL_sv_undef;
2603 if (PL_scopestack_ix > oldscope) {
2607 register PERL_CONTEXT *cx;
2614 PERL_UNUSED_VAR(newsp);
2615 PERL_UNUSED_VAR(gimme);
2616 PERL_UNUSED_VAR(optype);
2621 if (flags & G_DISCARD) {
2622 PL_stack_sp = PL_stack_base + oldmark;
2632 S_call_body(pTHX_ const OP *myop, bool is_eval)
2634 if (PL_op == myop) {
2636 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2638 PL_op = Perl_pp_entersub(aTHX); /* this does */
2644 /* Eval a string. The G_EVAL flag is always assumed. */
2647 =for apidoc p||eval_sv
2649 Tells Perl to C<eval> the string in the SV.
2655 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2657 /* See G_* flags in cop.h */
2660 UNOP myop; /* fake syntax tree node */
2661 volatile I32 oldmark = SP - PL_stack_base;
2662 volatile I32 retval = 0;
2664 OP* const oldop = PL_op;
2667 if (flags & G_DISCARD) {
2674 Zero(PL_op, 1, UNOP);
2675 EXTEND(PL_stack_sp, 1);
2676 *++PL_stack_sp = sv;
2678 if (!(flags & G_NOARGS))
2679 myop.op_flags = OPf_STACKED;
2680 myop.op_next = Nullop;
2681 myop.op_type = OP_ENTEREVAL;
2682 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2683 (flags & G_ARRAY) ? OPf_WANT_LIST :
2685 if (flags & G_KEEPERR)
2686 myop.op_flags |= OPf_SPECIAL;
2688 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2689 * before a PUSHEVAL, which corrupts the stack after a croak */
2690 TAINT_PROPER("eval_sv()");
2696 call_body((OP*)&myop,TRUE);
2697 retval = PL_stack_sp - (PL_stack_base + oldmark);
2698 if (!(flags & G_KEEPERR))
2699 sv_setpvn(ERRSV,"",0);
2705 /* my_exit() was called */
2706 PL_curstash = PL_defstash;
2709 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2710 Perl_croak(aTHX_ "Callback called exit");
2715 PL_op = PL_restartop;
2719 PL_stack_sp = PL_stack_base + oldmark;
2720 if (flags & G_ARRAY)
2724 *++PL_stack_sp = &PL_sv_undef;
2730 if (flags & G_DISCARD) {
2731 PL_stack_sp = PL_stack_base + oldmark;
2741 =for apidoc p||eval_pv
2743 Tells Perl to C<eval> the given string and return an SV* result.
2749 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2752 SV* sv = newSVpv(p, 0);
2754 eval_sv(sv, G_SCALAR);
2761 if (croak_on_error && SvTRUE(ERRSV)) {
2762 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2768 /* Require a module. */
2771 =head1 Embedding Functions
2773 =for apidoc p||require_pv
2775 Tells Perl to C<require> the file named by the string argument. It is
2776 analogous to the Perl code C<eval "require '$file'">. It's even
2777 implemented that way; consider using load_module instead.
2782 Perl_require_pv(pTHX_ const char *pv)
2786 PUSHSTACKi(PERLSI_REQUIRE);
2788 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2789 eval_sv(sv_2mortal(sv), G_DISCARD);
2795 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2797 register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV);
2800 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2804 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2806 /* This message really ought to be max 23 lines.
2807 * Removed -h because the user already knows that option. Others? */
2809 static const char * const usage_msg[] = {
2810 "-0[octal] specify record separator (\\0, if no argument)",
2811 "-A[mod][=pattern] activate all/given assertions",
2812 "-a autosplit mode with -n or -p (splits $_ into @F)",
2813 "-C[number/list] enables the listed Unicode features",
2814 "-c check syntax only (runs BEGIN and CHECK blocks)",
2815 "-d[:debugger] run program under debugger",
2816 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2817 "-e program one line of program (several -e's allowed, omit programfile)",
2818 "-f don't do $sitelib/sitecustomize.pl at startup",
2819 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2820 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2821 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2822 "-l[octal] enable line ending processing, specifies line terminator",
2823 "-[mM][-]module execute \"use/no module...\" before executing program",
2824 "-n assume \"while (<>) { ... }\" loop around program",
2825 "-p assume loop like -n but print line also, like sed",
2826 "-P run program through C preprocessor before compilation",
2827 "-s enable rudimentary parsing for switches after programfile",
2828 "-S look for programfile using PATH environment variable",
2829 "-t enable tainting warnings",
2830 "-T enable tainting checks",
2831 "-u dump core after parsing program",
2832 "-U allow unsafe operations",
2833 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2834 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2835 "-w enable many useful warnings (RECOMMENDED)",
2836 "-W enable all warnings",
2837 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2838 "-X disable all warnings",
2842 const char * const *p = usage_msg;
2844 PerlIO_printf(PerlIO_stdout(),
2845 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2848 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2851 /* convert a string of -D options (or digits) into an int.
2852 * sets *s to point to the char after the options */
2856 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2858 static const char * const usage_msgd[] = {
2859 " Debugging flag values: (see also -d)",
2860 " p Tokenizing and parsing (with v, displays parse stack)",
2861 " s Stack snapshots (with v, displays all stacks)",
2862 " l Context (loop) stack processing",
2863 " t Trace execution",
2864 " o Method and overloading resolution",
2865 " c String/numeric conversions",
2866 " P Print profiling info, preprocessor command for -P, source file input state",
2867 " m Memory allocation",
2868 " f Format processing",
2869 " r Regular expression parsing and execution",
2870 " x Syntax tree dump",
2871 " u Tainting checks",
2872 " H Hash dump -- usurps values()",
2873 " X Scratchpad allocation",
2875 " S Thread synchronization",
2877 " R Include reference counts of dumped variables (eg when using -Ds)",
2878 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2879 " v Verbose: use in conjunction with other flags",
2881 " A Consistency checks on internal structures",
2882 " q quiet - currently only suppresses the 'EXECUTING' message",
2887 /* if adding extra options, remember to update DEBUG_MASK */
2888 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2890 for (; isALNUM(**s); (*s)++) {
2891 const char * const d = strchr(debopts,**s);
2893 i |= 1 << (d - debopts);
2894 else if (ckWARN_d(WARN_DEBUGGING))
2895 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2896 "invalid option -D%c, use -D'' to see choices\n", **s);
2899 else if (isDIGIT(**s)) {
2901 for (; isALNUM(**s); (*s)++) ;
2903 else if (givehelp) {
2904 const char *const *p = usage_msgd;
2905 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2908 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2909 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2910 "-Dp not implemented on this platform\n");
2916 /* This routine handles any switches that can be given during run */
2919 Perl_moreswitches(pTHX_ char *s)
2930 SvREFCNT_dec(PL_rs);
2931 if (s[1] == 'x' && s[2]) {
2932 const char *e = s+=2;
2938 flags = PERL_SCAN_SILENT_ILLDIGIT;
2939 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2940 if (s + numlen < e) {
2941 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2945 PL_rs = newSVpvn("", 0);
2946 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2947 tmps = (U8*)SvPVX(PL_rs);
2948 uvchr_to_utf8(tmps, rschar);
2949 SvCUR_set(PL_rs, UNISKIP(rschar));
2954 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2955 if (rschar & ~((U8)~0))
2956 PL_rs = &PL_sv_undef;
2957 else if (!rschar && numlen >= 2)
2958 PL_rs = newSVpvn("", 0);
2960 char ch = (char)rschar;
2961 PL_rs = newSVpvn(&ch, 1);
2964 sv_setsv(get_sv("/", TRUE), PL_rs);
2969 PL_unicode = parse_unicode_opts( (const char **)&s );
2974 while (*s && !isSPACE(*s)) ++s;
2976 PL_splitstr = savepv(PL_splitstr);
2990 /* -dt indicates to the debugger that threads will be used */
2991 if (*s == 't' && !isALNUM(s[1])) {
2993 my_setenv("PERL5DB_THREADED", "1");
2996 /* The following permits -d:Mod to accepts arguments following an =
2997 in the fashion that -MSome::Mod does. */
2998 if (*s == ':' || *s == '=') {
3000 SV * const sv = newSVpv("use Devel::", 0);
3002 /* We now allow -d:Module=Foo,Bar */
3003 while(isALNUM(*s) || *s==':') ++s;
3005 sv_catpv(sv, start);
3007 sv_catpvn(sv, start, s-start);
3008 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3011 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3014 PL_perldb = PERLDB_ALL;
3023 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3024 #else /* !DEBUGGING */
3025 if (ckWARN_d(WARN_DEBUGGING))
3026 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3027 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3028 for (s++; isALNUM(*s); s++) ;
3033 usage(PL_origargv[0]);
3036 Safefree(PL_inplace);
3037 #if defined(__CYGWIN__) /* do backup extension automagically */
3038 if (*(s+1) == '\0') {
3039 PL_inplace = savepv(".bak");
3042 #endif /* __CYGWIN__ */
3043 PL_inplace = savepv(s+1);
3044 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3048 if (*s == '-') /* Additional switches on #! line. */
3052 case 'I': /* -I handled both here and in parse_body() */
3055 while (*s && isSPACE(*s))
3060 /* ignore trailing spaces (possibly followed by other switches) */
3062 for (e = p; *e && !isSPACE(*e); e++) ;
3066 } while (*p && *p != '-');
3067 e = savepvn(s, e-s);
3068 incpush(e, TRUE, TRUE, FALSE, FALSE);
3075 Perl_croak(aTHX_ "No directory specified for -I");
3081 SvREFCNT_dec(PL_ors_sv);
3087 PL_ors_sv = newSVpvn("\n",1);
3088 numlen = 3 + (*s == '0');
3089 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3093 if (RsPARA(PL_rs)) {
3094 PL_ors_sv = newSVpvn("\n\n",2);
3097 PL_ors_sv = newSVsv(PL_rs);
3104 PL_preambleav = newAV();
3107 char * const start = s;
3108 SV * const sv = newSVpv("use assertions::activate", 24);
3109 while(isALNUM(*s) || *s == ':') ++s;
3111 sv_catpvn(sv, "::", 2);
3112 sv_catpvn(sv, start, s-start);
3115 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3118 else if (*s != '\0') {
3119 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3121 av_push(PL_preambleav, sv);
3125 forbid_setid("-M"); /* XXX ? */
3128 forbid_setid("-m"); /* XXX ? */
3132 const char *use = "use ";
3133 /* -M-foo == 'no foo' */
3134 /* Leading space on " no " is deliberate, to make both
3135 possibilities the same length. */
3136 if (*s == '-') { use = " no "; ++s; }
3137 sv = newSVpvn(use,4);
3139 /* We allow -M'Module qw(Foo Bar)' */
3140 while(isALNUM(*s) || *s==':') ++s;
3142 sv_catpv(sv, start);
3143 if (*(start-1) == 'm') {
3145 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3146 sv_catpv( sv, " ()");
3150 Perl_croak(aTHX_ "Module name required with -%c option",
3152 sv_catpvn(sv, start, s-start);
3153 sv_catpv(sv, " split(/,/,q");
3154 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3156 sv_catpvn(sv, "\0)", 2);
3160 PL_preambleav = newAV();
3161 av_push(PL_preambleav, sv);
3164 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3176 PL_doswitches = TRUE;
3190 #ifdef MACOS_TRADITIONAL
3191 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3193 PL_do_undump = TRUE;
3201 if (!sv_derived_from(PL_patchlevel, "version"))
3202 (void *)upg_version(PL_patchlevel);
3204 PerlIO_printf(PerlIO_stdout(),
3205 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3206 vstringify(PL_patchlevel),
3209 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3210 PerlIO_printf(PerlIO_stdout(),
3211 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3212 vstringify(PL_patchlevel)));
3213 PerlIO_printf(PerlIO_stdout(),
3214 Perl_form(aTHX_ " built under %s at %s %s\n",
3215 OSNAME, __DATE__, __TIME__));
3216 PerlIO_printf(PerlIO_stdout(),
3217 Perl_form(aTHX_ " OS Specific Release: %s\n",
3221 #if defined(LOCAL_PATCH_COUNT)
3222 if (LOCAL_PATCH_COUNT > 0)
3223 PerlIO_printf(PerlIO_stdout(),
3224 "\n(with %d registered patch%s, "
3225 "see perl -V for more detail)",
3226 (int)LOCAL_PATCH_COUNT,
3227 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3230 PerlIO_printf(PerlIO_stdout(),
3231 "\n\nCopyright 1987-2005, Larry Wall\n");
3232 #ifdef MACOS_TRADITIONAL
3233 PerlIO_printf(PerlIO_stdout(),
3234 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3235 "maintained by Chris Nandor\n");
3238 PerlIO_printf(PerlIO_stdout(),
3239 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3242 PerlIO_printf(PerlIO_stdout(),
3243 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3244 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3249 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "atariST series port, ++jrb bammi@cadence.com\n");
3256 PerlIO_printf(PerlIO_stdout(),
3257 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MiNT port by Guido Flohr, 1997-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "EPOC port by Olaf Flebbe, 1999-2002\n");
3288 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3289 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3292 #ifdef __SYMBIAN32__
3293 PerlIO_printf(PerlIO_stdout(),
3294 "Symbian port by Nokia, 2004-2005\n");
3296 #ifdef BINARY_BUILD_NOTICE
3297 BINARY_BUILD_NOTICE;
3299 PerlIO_printf(PerlIO_stdout(),
3301 Perl may be copied only under the terms of either the Artistic License or the\n\
3302 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3303 Complete documentation for Perl, including FAQ lists, should be found on\n\
3304 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3305 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3308 if (! (PL_dowarn & G_WARN_ALL_MASK))
3309 PL_dowarn |= G_WARN_ON;
3313 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3314 if (!specialWARN(PL_compiling.cop_warnings))
3315 SvREFCNT_dec(PL_compiling.cop_warnings);
3316 PL_compiling.cop_warnings = pWARN_ALL ;
3320 PL_dowarn = G_WARN_ALL_OFF;
3321 if (!specialWARN(PL_compiling.cop_warnings))
3322 SvREFCNT_dec(PL_compiling.cop_warnings);
3323 PL_compiling.cop_warnings = pWARN_NONE ;
3328 if (s[1] == '-') /* Additional switches on #! line. */
3333 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3339 #ifdef ALTERNATE_SHEBANG
3340 case 'S': /* OS/2 needs -S on "extproc" line. */
3348 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3353 /* compliments of Tom Christiansen */
3355 /* unexec() can be found in the Gnu emacs distribution */
3356 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3359 Perl_my_unexec(pTHX)
3367 prog = newSVpv(BIN_EXP, 0);
3368 sv_catpv(prog, "/perl");
3369 file = newSVpv(PL_origfilename, 0);
3370 sv_catpv(file, ".perldump");
3372 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3373 /* unexec prints msg to stderr in case of failure */
3374 PerlProc_exit(status);
3377 # include <lib$routines.h>
3378 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3380 ABORT(); /* for use with undump */
3385 /* initialize curinterp */
3391 # define PERLVAR(var,type)
3392 # define PERLVARA(var,n,type)
3393 # if defined(PERL_IMPLICIT_CONTEXT)
3394 # if defined(USE_5005THREADS)
3395 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3396 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3397 # else /* !USE_5005THREADS */
3398 # define PERLVARI(var,type,init) aTHX->var = init;
3399 # define PERLVARIC(var,type,init) aTHX->var = init;
3400 # endif /* USE_5005THREADS */
3402 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3403 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3405 # include "intrpvar.h"
3406 # ifndef USE_5005THREADS
3407 # include "thrdvar.h"
3414 # define PERLVAR(var,type)
3415 # define PERLVARA(var,n,type)
3416 # define PERLVARI(var,type,init) PL_##var = init;
3417 # define PERLVARIC(var,type,init) PL_##var = init;
3418 # include "intrpvar.h"
3419 # ifndef USE_5005THREADS
3420 # include "thrdvar.h"
3431 S_init_main_stash(pTHX)
3435 PL_curstash = PL_defstash = newHV();
3436 PL_curstname = newSVpvn("main",4);
3437 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3438 SvREFCNT_dec(GvHV(gv));
3439 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3441 hv_name_set(PL_defstash, "main", 4, 0);
3442 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3443 GvMULTI_on(PL_incgv);
3444 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3445 GvMULTI_on(PL_hintgv);
3446 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3447 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3448 GvMULTI_on(PL_errgv);
3449 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3450 GvMULTI_on(PL_replgv);
3451 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3452 #ifdef PERL_DONT_CREATE_GVSV
3455 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3456 sv_setpvn(ERRSV, "", 0);
3457 PL_curstash = PL_defstash;
3458 CopSTASH_set(&PL_compiling, PL_defstash);
3459 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3460 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3461 /* We must init $/ before switches are processed. */
3462 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3465 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3467 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3472 const char *cpp_discard_flag;
3481 PL_origfilename = savepvn("-e", 2);
3484 /* if find_script() returns, it returns a malloc()-ed value */
3485 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3487 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3488 const char *s = scriptname + 8;
3489 PL_fdscript = atoi(s);
3494 * Tell apart "normal" usage of fdscript, e.g.
3495 * with bash on FreeBSD:
3496 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3497 * from usage in suidperl.
3498 * Does any "normal" usage leave garbage after the number???
3499 * Is it a mistake to use a similar /dev/fd/ construct for
3504 * Be supersafe and do some sanity-checks.
3505 * Still, can we be sure we got the right thing?
3508 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3511 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3513 scriptname = savepv(s + 1);
3514 Safefree(PL_origfilename);
3515 PL_origfilename = (char *)scriptname;
3520 CopFILE_free(PL_curcop);
3521 CopFILE_set(PL_curcop, PL_origfilename);
3522 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3523 scriptname = (char *)"";
3524 if (PL_fdscript >= 0) {
3525 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3526 # if defined(HAS_FCNTL) && defined(F_SETFD)
3528 /* ensure close-on-exec */
3529 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3534 Perl_croak(aTHX_ "sperl needs fd script\n"
3535 "You should not call sperl directly; do you need to "
3536 "change a #! line\nfrom sperl to perl?\n");
3539 * Do not open (or do other fancy stuff) while setuid.
3540 * Perl does the open, and hands script to suidperl on a fd;
3541 * suidperl only does some checks, sets up UIDs and re-execs
3542 * perl with that fd as it has always done.
3545 if (PL_suidscript != 1) {
3546 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3549 else if (PL_preprocess) {
3550 const char * const cpp_cfg = CPPSTDIN;
3551 SV * const cpp = newSVpvn("",0);
3552 SV * const cmd = NEWSV(0,0);
3554 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3555 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3556 if (strEQ(cpp_cfg, "cppstdin"))
3557 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3558 sv_catpv(cpp, cpp_cfg);
3561 sv_catpvn(sv, "-I", 2);
3562 sv_catpv(sv,PRIVLIB_EXP);
3565 DEBUG_P(PerlIO_printf(Perl_debug_log,
3566 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3567 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3570 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3577 cpp_discard_flag = "";
3579 cpp_discard_flag = "-C";
3583 perl = os2_execname(aTHX);
3585 perl = PL_origargv[0];
3589 /* This strips off Perl comments which might interfere with
3590 the C pre-processor, including #!. #line directives are
3591 deliberately stripped to avoid confusion with Perl's version
3592 of #line. FWP played some golf with it so it will fit
3593 into VMS's 255 character buffer.
3596 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3598 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3600 Perl_sv_setpvf(aTHX_ cmd, "\
3601 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3602 perl, quote, code, quote, scriptname, cpp,
3603 cpp_discard_flag, sv, CPPMINUS);
3605 PL_doextract = FALSE;
3607 DEBUG_P(PerlIO_printf(Perl_debug_log,
3608 "PL_preprocess: cmd=\"%s\"\n",
3611 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3615 else if (!*scriptname) {
3616 forbid_setid("program input from stdin");
3617 PL_rsfp = PerlIO_stdin();
3620 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3621 # if defined(HAS_FCNTL) && defined(F_SETFD)
3623 /* ensure close-on-exec */
3624 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3627 #endif /* IAMSUID */
3629 /* PSz 16 Sep 03 Keep neat error message */
3631 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3633 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3634 CopFILE(PL_curcop), Strerror(errno));
3639 * I_SYSSTATVFS HAS_FSTATVFS
3641 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3642 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3643 * here so that metaconfig picks them up. */
3647 S_fd_on_nosuid_fs(pTHX_ int fd)
3650 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3651 * but is needed also on machines without setreuid.
3652 * Seems safe enough to run as root.
3654 int check_okay = 0; /* able to do all the required sys/libcalls */
3655 int on_nosuid = 0; /* the fd is on a nosuid fs */
3657 * Need to check noexec also: nosuid might not be set, the average
3658 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3660 int on_noexec = 0; /* the fd is on a noexec fs */
3663 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3664 * fstatvfs() is UNIX98.
3665 * fstatfs() is 4.3 BSD.
3666 * ustat()+getmnt() is pre-4.3 BSD.
3667 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3668 * an irrelevant filesystem while trying to reach the right one.
3671 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3673 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3674 defined(HAS_FSTATVFS)
3675 # define FD_ON_NOSUID_CHECK_OKAY
3676 struct statvfs stfs;
3678 check_okay = fstatvfs(fd, &stfs) == 0;
3679 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3681 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3682 on platforms where it is present. */
3683 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3685 # endif /* fstatvfs */
3687 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3688 defined(PERL_MOUNT_NOSUID) && \
3689 defined(PERL_MOUNT_NOEXEC) && \
3690 defined(HAS_FSTATFS) && \
3691 defined(HAS_STRUCT_STATFS) && \
3692 defined(HAS_STRUCT_STATFS_F_FLAGS)
3693 # define FD_ON_NOSUID_CHECK_OKAY
3696 check_okay = fstatfs(fd, &stfs) == 0;
3697 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3698 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3699 # endif /* fstatfs */
3701 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3702 defined(PERL_MOUNT_NOSUID) && \
3703 defined(PERL_MOUNT_NOEXEC) && \
3704 defined(HAS_FSTAT) && \
3705 defined(HAS_USTAT) && \
3706 defined(HAS_GETMNT) && \
3707 defined(HAS_STRUCT_FS_DATA) && \
3709 # define FD_ON_NOSUID_CHECK_OKAY
3712 if (fstat(fd, &fdst) == 0) {
3714 if (ustat(fdst.st_dev, &us) == 0) {
3716 /* NOSTAT_ONE here because we're not examining fields which
3717 * vary between that case and STAT_ONE. */
3718 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3719 size_t cmplen = sizeof(us.f_fname);
3720 if (sizeof(fsd.fd_req.path) < cmplen)
3721 cmplen = sizeof(fsd.fd_req.path);
3722 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3723 fdst.st_dev == fsd.fd_req.dev) {
3725 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3726 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3731 # endif /* fstat+ustat+getmnt */
3733 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3734 defined(HAS_GETMNTENT) && \
3735 defined(HAS_HASMNTOPT) && \
3736 defined(MNTOPT_NOSUID) && \
3737 defined(MNTOPT_NOEXEC)
3738 # define FD_ON_NOSUID_CHECK_OKAY
3739 FILE *mtab = fopen("/etc/mtab", "r");
3740 struct mntent *entry;
3743 if (mtab && (fstat(fd, &stb) == 0)) {
3744 while (entry = getmntent(mtab)) {
3745 if (stat(entry->mnt_dir, &fsb) == 0
3746 && fsb.st_dev == stb.st_dev)
3748 /* found the filesystem */
3750 if (hasmntopt(entry, MNTOPT_NOSUID))
3752 if (hasmntopt(entry, MNTOPT_NOEXEC))
3755 } /* A single fs may well fail its stat(). */
3760 # endif /* getmntent+hasmntopt */
3763 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3765 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3767 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3768 return ((!check_okay) || on_nosuid || on_noexec);
3770 #endif /* IAMSUID */
3773 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3778 #endif /* IAMSUID */
3780 /* do we need to emulate setuid on scripts? */
3782 /* This code is for those BSD systems that have setuid #! scripts disabled
3783 * in the kernel because of a security problem. Merely defining DOSUID
3784 * in perl will not fix that problem, but if you have disabled setuid
3785 * scripts in the kernel, this will attempt to emulate setuid and setgid
3786 * on scripts that have those now-otherwise-useless bits set. The setuid
3787 * root version must be called suidperl or sperlN.NNN. If regular perl
3788 * discovers that it has opened a setuid script, it calls suidperl with
3789 * the same argv that it had. If suidperl finds that the script it has
3790 * just opened is NOT setuid root, it sets the effective uid back to the
3791 * uid. We don't just make perl setuid root because that loses the
3792 * effective uid we had before invoking perl, if it was different from the
3795 * Description/comments above do not match current workings:
3796 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3797 * suidperl called with script open and name changed to /dev/fd/N/X;
3798 * suidperl croaks if script is not setuid;
3799 * making perl setuid would be a huge security risk (and yes, that
3800 * would lose any euid we might have had).
3802 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3803 * be defined in suidperl only. suidperl must be setuid root. The
3804 * Configure script will set this up for you if you want it.
3810 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3811 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3812 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3814 const char *linestr;
3817 if (PL_fdscript < 0 || PL_suidscript != 1)
3818 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3820 * Since the script is opened by perl, not suidperl, some of these
3821 * checks are superfluous. Leaving them in probably does not lower
3825 * Do checks even for systems with no HAS_SETREUID.
3826 * We used to swap, then re-swap UIDs with
3828 if (setreuid(PL_euid,PL_uid) < 0
3829 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3830 Perl_croak(aTHX_ "Can't swap uid and euid");
3833 if (setreuid(PL_uid,PL_euid) < 0
3834 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3835 Perl_croak(aTHX_ "Can't reswap uid and euid");
3839 /* On this access check to make sure the directories are readable,
3840 * there is actually a small window that the user could use to make
3841 * filename point to an accessible directory. So there is a faint
3842 * chance that someone could execute a setuid script down in a
3843 * non-accessible directory. I don't know what to do about that.
3844 * But I don't think it's too important. The manual lies when
3845 * it says access() is useful in setuid programs.
3847 * So, access() is pretty useless... but not harmful... do anyway.
3849 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3850 Perl_croak(aTHX_ "Can't access() script\n");
3853 /* If we can swap euid and uid, then we can determine access rights
3854 * with a simple stat of the file, and then compare device and
3855 * inode to make sure we did stat() on the same file we opened.
3856 * Then we just have to make sure he or she can execute it.
3859 * As the script is opened by perl, not suidperl, we do not need to
3860 * care much about access rights.
3862 * The 'script changed' check is needed, or we can get lied to
3863 * about $0 with e.g.
3864 * suidperl /dev/fd/4//bin/x 4<setuidscript
3865 * Without HAS_SETREUID, is it safe to stat() as root?
3867 * Are there any operating systems that pass /dev/fd/xxx for setuid
3868 * scripts, as suggested/described in perlsec(1)? Surely they do not
3869 * pass the script name as we do, so the "script changed" test would
3870 * fail for them... but we never get here with
3871 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3873 * This is one place where we must "lie" about return status: not
3874 * say if the stat() failed. We are doing this as root, and could
3875 * be tricked into reporting existence or not of files that the
3876 * "plain" user cannot even see.
3880 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3881 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3882 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3883 Perl_croak(aTHX_ "Setuid script changed\n");
3887 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3888 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3891 * We used to do this check as the "plain" user (after swapping
3892 * UIDs). But the check for nosuid and noexec filesystem is needed,
3893 * and should be done even without HAS_SETREUID. (Maybe those
3894 * operating systems do not have such mount options anyway...)
3895 * Seems safe enough to do as root.
3897 #if !defined(NO_NOSUID_CHECK)
3898 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3899 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3902 #endif /* IAMSUID */
3904 if (!S_ISREG(PL_statbuf.st_mode)) {
3905 Perl_croak(aTHX_ "Setuid script not plain file\n");
3907 if (PL_statbuf.st_mode & S_IWOTH)
3908 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3909 PL_doswitches = FALSE; /* -s is insecure in suid */
3910 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3911 CopLINE_inc(PL_curcop);
3912 linestr = SvPV_nolen_const(PL_linestr);
3913 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3914 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3915 Perl_croak(aTHX_ "No #! line");
3919 /* Sanity check on line length */
3920 if (strlen(s) < 1 || strlen(s) > 4000)
3921 Perl_croak(aTHX_ "Very long #! line");
3922 /* Allow more than a single space after #! */
3923 while (isSPACE(*s)) s++;
3924 /* Sanity check on buffer end */
3925 while ((*s) && !isSPACE(*s)) s++;
3926 for (s2 = s; (s2 > linestr &&
3927 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3928 || s2[-1] == '-')); s2--) ;
3929 /* Sanity check on buffer start */
3930 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3931 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3932 Perl_croak(aTHX_ "Not a perl script");
3933 while (*s == ' ' || *s == '\t') s++;
3935 * #! arg must be what we saw above. They can invoke it by
3936 * mentioning suidperl explicitly, but they may not add any strange
3937 * arguments beyond what #! says if they do invoke suidperl that way.
3940 * The way validarg was set up, we rely on the kernel to start
3941 * scripts with argv[1] set to contain all #! line switches (the
3945 * Check that we got all the arguments listed in the #! line (not
3946 * just that there are no extraneous arguments). Might not matter
3947 * much, as switches from #! line seem to be acted upon (also), and
3948 * so may be checked and trapped in perl. But, security checks must
3949 * be done in suidperl and not deferred to perl. Note that suidperl
3950 * does not get around to parsing (and checking) the switches on
3951 * the #! line (but execs perl sooner).
3952 * Allow (require) a trailing newline (which may be of two
3953 * characters on some architectures?) (but no other trailing
3956 len = strlen(validarg);
3957 if (strEQ(validarg," PHOOEY ") ||
3958 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3959 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3960 Perl_croak(aTHX_ "Args must match #! line");
3963 if (PL_fdscript < 0 &&
3964 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3965 PL_euid == PL_statbuf.st_uid)
3967 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3968 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3969 #endif /* IAMSUID */
3971 if (PL_fdscript < 0 &&
3972 PL_euid) { /* oops, we're not the setuid root perl */
3974 * When root runs a setuid script, we do not go through the same
3975 * steps of execing sperl and then perl with fd scripts, but
3976 * simply set up UIDs within the same perl invocation; so do
3977 * not have the same checks (on options, whatever) that we have
3978 * for plain users. No problem really: would have to be a script
3979 * that does not actually work for plain users; and if root is
3980 * foolish and can be persuaded to run such an unsafe script, he
3981 * might run also non-setuid ones, and deserves what he gets.
3983 * Or, we might drop the PL_euid check above (and rely just on
3984 * PL_fdscript to avoid loops), and do the execs
3990 * Pass fd script to suidperl.
3991 * Exec suidperl, substituting fd script for scriptname.
3992 * Pass script name as "subdir" of fd, which perl will grok;
3993 * in fact will use that to distinguish this from "normal"
3994 * usage, see comments above.
3996 PerlIO_rewind(PL_rsfp);
3997 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3998 /* PSz 27 Feb 04 Sanity checks on scriptname */
3999 if ((!scriptname) || (!*scriptname) ) {
4000 Perl_croak(aTHX_ "No setuid script name\n");
4002 if (*scriptname == '-') {
4003 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4004 /* Or we might confuse it with an option when replacing
4005 * name in argument list, below (though we do pointer, not
4006 * string, comparisons).
4009 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4010 if (!PL_origargv[which]) {
4011 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4013 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4014 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4015 #if defined(HAS_FCNTL) && defined(F_SETFD)
4016 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4019 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4020 (int)PERL_REVISION, (int)PERL_VERSION,
4021 (int)PERL_SUBVERSION), PL_origargv);
4023 #endif /* IAMSUID */
4024 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4027 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4029 * This seems back to front: we try HAS_SETEGID first; if not available
4030 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4031 * in the sense that we only want to set EGID; but are there any machines
4032 * with either of the latter, but not the former? Same with UID, later.
4035 (void)setegid(PL_statbuf.st_gid);
4038 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4040 #ifdef HAS_SETRESGID
4041 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4043 PerlProc_setgid(PL_statbuf.st_gid);
4047 if (PerlProc_getegid() != PL_statbuf.st_gid)
4048 Perl_croak(aTHX_ "Can't do setegid!\n");
4050 if (PL_statbuf.st_mode & S_ISUID) {
4051 if (PL_statbuf.st_uid != PL_euid)
4053 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4056 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4058 #ifdef HAS_SETRESUID
4059 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4061 PerlProc_setuid(PL_statbuf.st_uid);
4065 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4066 Perl_croak(aTHX_ "Can't do seteuid!\n");
4068 else if (PL_uid) { /* oops, mustn't run as root */
4070 (void)seteuid((Uid_t)PL_uid);
4073 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4075 #ifdef HAS_SETRESUID
4076 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4078 PerlProc_setuid((Uid_t)PL_uid);
4082 if (PerlProc_geteuid() != PL_uid)
4083 Perl_croak(aTHX_ "Can't do seteuid!\n");
4086 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4087 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4090 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4091 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4092 else if (PL_fdscript < 0 || PL_suidscript != 1)
4093 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4094 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4096 /* PSz 16 Sep 03 Keep neat error message */
4097 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4100 /* We absolutely must clear out any saved ids here, so we */
4101 /* exec the real perl, substituting fd script for scriptname. */
4102 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4104 * It might be thought that using setresgid and/or setresuid (changed to
4105 * set the saved IDs) above might obviate the need to exec, and we could
4106 * go on to "do the perl thing".
4108 * Is there such a thing as "saved GID", and is that set for setuid (but
4109 * not setgid) execution like suidperl? Without exec, it would not be
4110 * cleared for setuid (but not setgid) scripts (or might need a dummy
4113 * We need suidperl to do the exact same argument checking that perl
4114 * does. Thus it cannot be very small; while it could be significantly
4115 * smaller, it is safer (simpler?) to make it essentially the same
4116 * binary as perl (but they are not identical). - Maybe could defer that
4117 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4118 * but prefer to do thorough checks in suidperl itself. Such deferral
4119 * would make suidperl security rely on perl, a design no-no.
4121 * Setuid things should be short and simple, thus easy to understand and
4122 * verify. They should do their "own thing", without influence by
4123 * attackers. It may help if their internal execution flow is fixed,
4124 * regardless of platform: it may be best to exec anyway.
4126 * Suidperl should at least be conceptually simple: a wrapper only,
4127 * never to do any real perl. Maybe we should put
4129 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4131 * into the perly bits.
4133 PerlIO_rewind(PL_rsfp);
4134 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4136 * Keep original arguments: suidperl already has fd script.
4138 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4139 /* if (!PL_origargv[which]) { */
4140 /* errno = EPERM; */
4141 /* Perl_croak(aTHX_ "Permission denied\n"); */
4143 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4144 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4145 #if defined(HAS_FCNTL) && defined(F_SETFD)
4146 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4149 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4150 (int)PERL_REVISION, (int)PERL_VERSION,
4151 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4153 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4154 #endif /* IAMSUID */
4156 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4157 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4158 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4159 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4161 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4164 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4165 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4166 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4167 /* not set-id, must be wrapped */
4175 S_find_beginning(pTHX)
4178 register const char *s2;
4179 #ifdef MACOS_TRADITIONAL
4183 /* skip forward in input to the real script? */
4186 #ifdef MACOS_TRADITIONAL
4187 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4189 while (PL_doextract || gMacPerl_AlwaysExtract) {
4190 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4191 if (!gMacPerl_AlwaysExtract)
4192 Perl_croak(aTHX_ "No Perl script found in input\n");
4194 if (PL_doextract) /* require explicit override ? */
4195 if (!OverrideExtract(PL_origfilename))
4196 Perl_croak(aTHX_ "User aborted script\n");
4198 PL_doextract = FALSE;
4200 /* Pater peccavi, file does not have #! */
4201 PerlIO_rewind(PL_rsfp);
4206 while (PL_doextract) {
4207 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4208 Perl_croak(aTHX_ "No Perl script found in input\n");
4211 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4212 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4213 PL_doextract = FALSE;
4214 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4216 while (*s == ' ' || *s == '\t') s++;
4218 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4219 || s2[-1] == '_') s2--;
4220 if (strnEQ(s2-4,"perl",4))
4221 while ((s = moreswitches(s)))
4224 #ifdef MACOS_TRADITIONAL
4225 /* We are always searching for the #!perl line in MacPerl,
4226 * so if we find it, still keep the line count correct
4227 * by counting lines we already skipped over
4229 for (; maclines > 0 ; maclines--)
4230 PerlIO_ungetc(PL_rsfp, '\n');
4234 /* gMacPerl_AlwaysExtract is false in MPW tool */
4235 } else if (gMacPerl_AlwaysExtract) {
4246 PL_uid = PerlProc_getuid();
4247 PL_euid = PerlProc_geteuid();
4248 PL_gid = PerlProc_getgid();
4249 PL_egid = PerlProc_getegid();
4251 PL_uid |= PL_gid << 16;
4252 PL_euid |= PL_egid << 16;
4254 /* Should not happen: */
4255 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4256 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4259 * Should go by suidscript, not uid!=euid: why disallow
4260 * system("ls") in scripts run from setuid things?
4261 * Or, is this run before we check arguments and set suidscript?
4262 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4263 * (We never have suidscript, can we be sure to have fdscript?)
4264 * Or must then go by UID checks? See comments in forbid_setid also.
4268 /* This is used very early in the lifetime of the program,
4269 * before even the options are parsed, so PL_tainting has
4270 * not been initialized properly. */
4272 Perl_doing_taint(int argc, char *argv[], char *envp[])
4274 #ifndef PERL_IMPLICIT_SYS
4275 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4276 * before we have an interpreter-- and the whole point of this
4277 * function is to be called at such an early stage. If you are on
4278 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4279 * "tainted because running with altered effective ids', you'll
4280 * have to add your own checks somewhere in here. The two most
4281 * known samples of 'implicitness' are Win32 and NetWare, neither
4282 * of which has much of concept of 'uids'. */
4283 int uid = PerlProc_getuid();
4284 int euid = PerlProc_geteuid();
4285 int gid = PerlProc_getgid();
4286 int egid = PerlProc_getegid();
4293 if (uid && (euid != uid || egid != gid))
4295 #endif /* !PERL_IMPLICIT_SYS */
4296 /* This is a really primitive check; environment gets ignored only
4297 * if -T are the first chars together; otherwise one gets
4298 * "Too late" message. */
4299 if ( argc > 1 && argv[1][0] == '-'
4300 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4306 S_forbid_setid(pTHX_ const char *s)
4308 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4309 if (PL_euid != PL_uid)
4310 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4311 if (PL_egid != PL_gid)
4312 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4313 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4315 * Checks for UID/GID above "wrong": why disallow
4316 * perl -e 'print "Hello\n"'
4317 * from within setuid things?? Simply drop them: replaced by
4318 * fdscript/suidscript and #ifdef IAMSUID checks below.
4320 * This may be too late for command-line switches. Will catch those on
4321 * the #! line, after finding the script name and setting up
4322 * fdscript/suidscript. Note that suidperl does not get around to
4323 * parsing (and checking) the switches on the #! line, but checks that
4324 * the two sets are identical.
4326 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4327 * instead, or would that be "too late"? (We never have suidscript, can
4328 * we be sure to have fdscript?)
4330 * Catch things with suidscript (in descendant of suidperl), even with
4331 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4332 * below; but I am paranoid.
4334 * Also see comments about root running a setuid script, elsewhere.
4336 if (PL_suidscript >= 0)
4337 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4339 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4340 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4341 #endif /* IAMSUID */
4345 Perl_init_debugger(pTHX)
4347 HV * const ostash = PL_curstash;
4349 PL_curstash = PL_debstash;
4350 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4351 AvREAL_off(PL_dbargs);
4352 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4353 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4354 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4355 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4356 sv_setiv(PL_DBsingle, 0);
4357 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4358 sv_setiv(PL_DBtrace, 0);
4359 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4360 sv_setiv(PL_DBsignal, 0);
4361 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4362 sv_setiv(PL_DBassertion, 0);
4363 PL_curstash = ostash;
4366 #ifndef STRESS_REALLOC
4367 #define REASONABLE(size) (size)
4369 #define REASONABLE(size) (1) /* unreasonable */
4373 Perl_init_stacks(pTHX)
4375 /* start with 128-item stack and 8K cxstack */
4376 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4377 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4378 PL_curstackinfo->si_type = PERLSI_MAIN;
4379 PL_curstack = PL_curstackinfo->si_stack;
4380 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4382 PL_stack_base = AvARRAY(PL_curstack);
4383 PL_stack_sp = PL_stack_base;
4384 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4386 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4389 PL_tmps_max = REASONABLE(128);
4391 Newx(PL_markstack,REASONABLE(32),I32);
4392 PL_markstack_ptr = PL_markstack;
4393 PL_markstack_max = PL_markstack + REASONABLE(32);
4397 Newx(PL_scopestack,REASONABLE(32),I32);
4398 PL_scopestack_ix = 0;
4399 PL_scopestack_max = REASONABLE(32);
4401 Newx(PL_savestack,REASONABLE(128),ANY);
4402 PL_savestack_ix = 0;
4403 PL_savestack_max = REASONABLE(128);
4411 while (PL_curstackinfo->si_next)
4412 PL_curstackinfo = PL_curstackinfo->si_next;
4413 while (PL_curstackinfo) {
4414 PERL_SI *p = PL_curstackinfo->si_prev;
4415 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4416 Safefree(PL_curstackinfo->si_cxstack);
4417 Safefree(PL_curstackinfo);
4418 PL_curstackinfo = p;
4420 Safefree(PL_tmps_stack);
4421 Safefree(PL_markstack);
4422 Safefree(PL_scopestack);
4423 Safefree(PL_savestack);
4432 lex_start(PL_linestr);
4434 PL_subname = newSVpvn("main",4);
4438 S_init_predump_symbols(pTHX)
4443 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4444 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4445 GvMULTI_on(PL_stdingv);
4446 io = GvIOp(PL_stdingv);
4447 IoTYPE(io) = IoTYPE_RDONLY;
4448 IoIFP(io) = PerlIO_stdin();
4449 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4451 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4453 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4456 IoTYPE(io) = IoTYPE_WRONLY;
4457 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4459 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4461 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4463 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4464 GvMULTI_on(PL_stderrgv);
4465 io = GvIOp(PL_stderrgv);
4466 IoTYPE(io) = IoTYPE_WRONLY;
4467 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4468 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4470 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4472 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4474 Safefree(PL_osname);
4475 PL_osname = savepv(OSNAME);
4479 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4481 argc--,argv++; /* skip name of script */
4482 if (PL_doswitches) {
4483 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4487 if (argv[0][1] == '-' && !argv[0][2]) {
4491 if ((s = strchr(argv[0], '='))) {
4493 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4496 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4499 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4500 GvMULTI_on(PL_argvgv);
4501 (void)gv_AVadd(PL_argvgv);
4502 av_clear(GvAVn(PL_argvgv));
4503 for (; argc > 0; argc--,argv++) {
4504 SV * const sv = newSVpv(argv[0],0);
4505 av_push(GvAVn(PL_argvgv),sv);
4506 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4507 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4510 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4511 (void)sv_utf8_decode(sv);
4517 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4522 PL_toptarget = NEWSV(0,0);
4523 sv_upgrade(PL_toptarget, SVt_PVFM);
4524 sv_setpvn(PL_toptarget, "", 0);
4525 PL_bodytarget = NEWSV(0,0);
4526 sv_upgrade(PL_bodytarget, SVt_PVFM);
4527 sv_setpvn(PL_bodytarget, "", 0);
4528 PL_formtarget = PL_bodytarget;
4532 init_argv_symbols(argc,argv);
4534 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4535 #ifdef MACOS_TRADITIONAL
4536 /* $0 is not majick on a Mac */
4537 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4539 sv_setpv(GvSV(tmpgv),PL_origfilename);
4540 magicname("0", "0", 1);
4543 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4545 GvMULTI_on(PL_envgv);
4546 hv = GvHVn(PL_envgv);
4547 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4549 #ifdef USE_ENVIRON_ARRAY
4550 /* Note that if the supplied env parameter is actually a copy
4551 of the global environ then it may now point to free'd memory
4552 if the environment has been modified since. To avoid this
4553 problem we treat env==NULL as meaning 'use the default'
4558 # ifdef USE_ITHREADS
4559 && PL_curinterp == aTHX
4563 environ[0] = Nullch;
4566 char** origenv = environ;
4569 for (; *env; env++) {
4570 if (!(s = strchr(*env,'=')) || s == *env)
4572 #if defined(MSDOS) && !defined(DJGPP)
4577 sv = newSVpv(s+1, 0);
4578 (void)hv_store(hv, *env, s - *env, sv, 0);
4581 if (origenv != environ) {
4582 /* realloc has shifted us */
4583 env = (env - origenv) + environ;
4588 #endif /* USE_ENVIRON_ARRAY */
4589 #endif /* !PERL_MICRO */
4592 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4593 SvREADONLY_off(GvSV(tmpgv));
4594 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4595 SvREADONLY_on(GvSV(tmpgv));
4597 #ifdef THREADS_HAVE_PIDS
4598 PL_ppid = (IV)getppid();
4601 /* touch @F array to prevent spurious warnings 20020415 MJD */
4603 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4605 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4606 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4607 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4611 S_init_perllib(pTHX)
4616 s = PerlEnv_getenv("PERL5LIB");
4618 * It isn't possible to delete an environment variable with
4619 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4620 * case we treat PERL5LIB as undefined if it has a zero-length value.
4622 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4623 if (s && *s != '\0')
4627 incpush(s, TRUE, TRUE, TRUE, FALSE);
4629 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4631 /* Treat PERL5?LIB as a possible search list logical name -- the
4632 * "natural" VMS idiom for a Unix path string. We allow each
4633 * element to be a set of |-separated directories for compatibility.
4637 if (my_trnlnm("PERL5LIB",buf,0))
4638 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4640 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4644 /* Use the ~-expanded versions of APPLLIB (undocumented),
4645 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4648 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4652 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4654 #ifdef MACOS_TRADITIONAL
4657 SV * privdir = NEWSV(55, 0);
4658 char * macperl = PerlEnv_getenv("MACPERL");
4663 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4664 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4665 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4666 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4667 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4668 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4670 SvREFCNT_dec(privdir);
4673 incpush(":", FALSE, FALSE, TRUE, FALSE);
4676 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4679 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4681 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4685 /* sitearch is always relative to sitelib on Windows for
4686 * DLL-based path intuition to work correctly */
4687 # if !defined(WIN32)
4688 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4694 /* this picks up sitearch as well */
4695 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4697 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4701 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4702 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4705 #ifdef PERL_VENDORARCH_EXP
4706 /* vendorarch is always relative to vendorlib on Windows for
4707 * DLL-based path intuition to work correctly */
4708 # if !defined(WIN32)
4709 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4713 #ifdef PERL_VENDORLIB_EXP
4715 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4717 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4721 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4722 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4725 #ifdef PERL_OTHERLIBDIRS
4726 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4730 incpush(".", FALSE, FALSE, TRUE, FALSE);
4731 #endif /* MACOS_TRADITIONAL */
4734 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4735 # define PERLLIB_SEP ';'
4738 # define PERLLIB_SEP '|'
4740 # if defined(MACOS_TRADITIONAL)
4741 # define PERLLIB_SEP ','
4743 # define PERLLIB_SEP ':'
4747 #ifndef PERLLIB_MANGLE
4748 # define PERLLIB_MANGLE(s,n) (s)
4751 /* Push a directory onto @INC if it exists.
4752 Generate a new SV if we do this, to save needing to copy the SV we push
4755 S_incpush_if_exists(pTHX_ SV *dir)
4758 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4759 S_ISDIR(tmpstatbuf.st_mode)) {
4760 av_push(GvAVn(PL_incgv), dir);
4767 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4770 SV *subdir = Nullsv;
4771 const char *p = dir;
4776 if (addsubdirs || addoldvers) {
4777 subdir = NEWSV(0,0);
4780 /* Break at all separators */
4782 SV *libdir = NEWSV(55,0);
4785 /* skip any consecutive separators */
4787 while ( *p == PERLLIB_SEP ) {
4788 /* Uncomment the next line for PATH semantics */
4789 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4794 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4795 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4800 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4801 p = Nullch; /* break out */
4803 #ifdef MACOS_TRADITIONAL
4804 if (!strchr(SvPVX(libdir), ':')) {
4807 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4809 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4810 sv_catpv(libdir, ":");
4813 /* Do the if() outside the #ifdef to avoid warnings about an unused
4816 #ifdef PERL_RELOCATABLE_INC
4818 * Relocatable include entries are marked with a leading .../
4821 * 0: Remove that leading ".../"
4822 * 1: Remove trailing executable name (anything after the last '/')
4823 * from the perl path to give a perl prefix
4825 * While the @INC element starts "../" and the prefix ends with a real
4826 * directory (ie not . or ..) chop that real directory off the prefix
4827 * and the leading "../" from the @INC element. ie a logical "../"
4829 * Finally concatenate the prefix and the remainder of the @INC element
4830 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4831 * generates /usr/local/lib/perl5
4833 const char *libpath = SvPVX(libdir);
4834 STRLEN libpath_len = SvCUR(libdir);
4835 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4837 SV * const caret_X = get_sv("\030", 0);
4838 /* Going to use the SV just as a scratch buffer holding a C
4844 /* $^X is *the* source of taint if tainting is on, hence
4845 SvPOK() won't be true. */
4847 assert(SvPOKp(caret_X));
4848 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4849 /* Firstly take off the leading .../
4850 If all else fail we'll do the paths relative to the current
4852 sv_chop(libdir, libpath + 4);
4853 /* Don't use SvPV as we're intentionally bypassing taining,
4854 mortal copies that the mg_get of tainting creates, and
4855 corruption that seems to come via the save stack.
4856 I guess that the save stack isn't correctly set up yet. */
4857 libpath = SvPVX(libdir);
4858 libpath_len = SvCUR(libdir);
4860 /* This would work more efficiently with memrchr, but as it's
4861 only a GNU extension we'd need to probe for it and
4862 implement our own. Not hard, but maybe not worth it? */
4864 prefix = SvPVX(prefix_sv);
4865 lastslash = strrchr(prefix, '/');
4867 /* First time in with the *lastslash = '\0' we just wipe off
4868 the trailing /perl from (say) /usr/foo/bin/perl
4872 while ((*lastslash = '\0'), /* Do that, come what may. */
4873 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4874 && (lastslash = strrchr(prefix, '/')))) {
4875 if (lastslash[1] == '\0'
4876 || (lastslash[1] == '.'
4877 && (lastslash[2] == '/' /* ends "/." */
4878 || (lastslash[2] == '/'
4879 && lastslash[3] == '/' /* or "/.." */
4881 /* Prefix ends "/" or "/." or "/..", any of which
4882 are fishy, so don't do any more logical cleanup.
4886 /* Remove leading "../" from path */
4889 /* Next iteration round the loop removes the last
4890 directory name from prefix by writing a '\0' in
4891 the while clause. */
4893 /* prefix has been terminated with a '\0' to the correct
4894 length. libpath points somewhere into the libdir SV.
4895 We need to join the 2 with '/' and drop the result into
4897 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4898 SvREFCNT_dec(libdir);
4899 /* And this is the new libdir. */
4902 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4903 /* Need to taint reloccated paths if running set ID */
4904 SvTAINTED_on(libdir);
4907 SvREFCNT_dec(prefix_sv);
4912 * BEFORE pushing libdir onto @INC we may first push version- and
4913 * archname-specific sub-directories.
4915 if (addsubdirs || addoldvers) {
4916 #ifdef PERL_INC_VERSION_LIST
4917 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4918 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4919 const char * const *incver;
4925 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4927 while (unix[len-1] == '/') len--; /* Cosmetic */
4928 sv_usepvn(libdir,unix,len);
4931 PerlIO_printf(Perl_error_log,
4932 "Failed to unixify @INC element \"%s\"\n",
4936 #ifdef MACOS_TRADITIONAL
4937 #define PERL_AV_SUFFIX_FMT ""
4938 #define PERL_ARCH_FMT "%s:"
4939 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4941 #define PERL_AV_SUFFIX_FMT "/"
4942 #define PERL_ARCH_FMT "/%s"
4943 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4945 /* .../version/archname if -d .../version/archname */
4946 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4948 (int)PERL_REVISION, (int)PERL_VERSION,
4949 (int)PERL_SUBVERSION, ARCHNAME);
4950 subdir = S_incpush_if_exists(aTHX_ subdir);
4952 /* .../version if -d .../version */
4953 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4954 (int)PERL_REVISION, (int)PERL_VERSION,
4955 (int)PERL_SUBVERSION);
4956 subdir = S_incpush_if_exists(aTHX_ subdir);
4958 /* .../archname if -d .../archname */
4959 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4960 subdir = S_incpush_if_exists(aTHX_ subdir);
4964 #ifdef PERL_INC_VERSION_LIST
4966 for (incver = incverlist; *incver; incver++) {
4967 /* .../xxx if -d .../xxx */
4968 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4969 subdir = S_incpush_if_exists(aTHX_ subdir);
4975 /* finally push this lib directory on the end of @INC */
4976 av_push(GvAVn(PL_incgv), libdir);
4979 assert (SvREFCNT(subdir) == 1);
4980 SvREFCNT_dec(subdir);
4984 #ifdef USE_5005THREADS
4985 STATIC struct perl_thread *
4986 S_init_main_thread(pTHX)
4988 #if !defined(PERL_IMPLICIT_CONTEXT)
4989 struct perl_thread *thr;
4993 Newxz(thr, 1, struct perl_thread);
4994 PL_curcop = &PL_compiling;
4995 thr->interp = PERL_GET_INTERP;
4996 thr->cvcache = newHV();
4997 thr->threadsv = newAV();
4998 /* thr->threadsvp is set when find_threadsv is called */
4999 thr->specific = newAV();
5000 thr->flags = THRf_R_JOINABLE;
5001 MUTEX_INIT(&thr->mutex);
5002 /* Handcraft thrsv similarly to mess_sv */
5003 Newx(PL_thrsv, 1, SV);
5005 SvFLAGS(PL_thrsv) = SVt_PV;
5006 SvANY(PL_thrsv) = (void*)xpv;
5007 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5008 SvPV_set(PL_thrsvr, (char*)thr);
5009 SvCUR_set(PL_thrsv, sizeof(thr));
5010 SvLEN_set(PL_thrsv, sizeof(thr));
5011 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5012 thr->oursv = PL_thrsv;
5013 PL_chopset = " \n-";
5016 MUTEX_LOCK(&PL_threads_mutex);
5022 MUTEX_UNLOCK(&PL_threads_mutex);
5024 #ifdef HAVE_THREAD_INTERN
5025 Perl_init_thread_intern(thr);
5028 #ifdef SET_THREAD_SELF
5029 SET_THREAD_SELF(thr);
5031 thr->self = pthread_self();
5032 #endif /* SET_THREAD_SELF */
5036 * These must come after the thread self setting
5037 * because sv_setpvn does SvTAINT and the taint
5038 * fields thread selfness being set.
5040 PL_toptarget = NEWSV(0,0);
5041 sv_upgrade(PL_toptarget, SVt_PVFM);
5042 sv_setpvn(PL_toptarget, "", 0);
5043 PL_bodytarget = NEWSV(0,0);
5044 sv_upgrade(PL_bodytarget, SVt_PVFM);
5045 sv_setpvn(PL_bodytarget, "", 0);
5046 PL_formtarget = PL_bodytarget;
5047 thr->errsv = newSVpvn("", 0);
5048 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5051 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5052 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5053 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5054 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5055 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5056 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5058 PL_reginterp_cnt = 0;
5062 #endif /* USE_5005THREADS */
5065 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5069 const line_t oldline = CopLINE(PL_curcop);
5075 while (av_len(paramList) >= 0) {
5076 cv = (CV*)av_shift(paramList);
5078 if (paramList == PL_beginav) {
5079 /* save PL_beginav for compiler */
5080 if (! PL_beginav_save)
5081 PL_beginav_save = newAV();
5082 av_push(PL_beginav_save, (SV*)cv);
5084 else if (paramList == PL_checkav) {
5085 /* save PL_checkav for compiler */
5086 if (! PL_checkav_save)
5087 PL_checkav_save = newAV();
5088 av_push(PL_checkav_save, (SV*)cv);
5098 (void)SvPV_const(atsv, len);
5100 PL_curcop = &PL_compiling;
5101 CopLINE_set(PL_curcop, oldline);
5102 if (paramList == PL_beginav)
5103 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5105 Perl_sv_catpvf(aTHX_ atsv,
5106 "%s failed--call queue aborted",
5107 paramList == PL_checkav ? "CHECK"
5108 : paramList == PL_initav ? "INIT"
5110 while (PL_scopestack_ix > oldscope)
5113 Perl_croak(aTHX_ "%"SVf"", atsv);
5120 /* my_exit() was called */
5121 while (PL_scopestack_ix > oldscope)
5124 PL_curstash = PL_defstash;
5125 PL_curcop = &PL_compiling;
5126 CopLINE_set(PL_curcop, oldline);
5128 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5129 if (paramList == PL_beginav)
5130 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5132 Perl_croak(aTHX_ "%s failed--call queue aborted",
5133 paramList == PL_checkav ? "CHECK"
5134 : paramList == PL_initav ? "INIT"
5141 PL_curcop = &PL_compiling;
5142 CopLINE_set(PL_curcop, oldline);
5145 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5154 S_call_list_body(pTHX_ CV *cv)
5156 PUSHMARK(PL_stack_sp);
5157 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5162 Perl_my_exit(pTHX_ U32 status)
5164 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5165 thr, (unsigned long) status));
5174 STATUS_EXIT_SET(status);
5181 Perl_my_failure_exit(pTHX)
5184 /* We have been called to fall on our sword. The desired exit code
5185 * should be already set in STATUS_UNIX, but could be shifted over
5186 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5189 * If an error code has not been set, then force the issue.
5191 if (MY_POSIX_EXIT) {
5193 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5194 * the exit code when there isn't an error.
5197 if (STATUS_UNIX == 0)
5198 STATUS_UNIX_EXIT_SET(255);
5200 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5202 /* The exit code could have been set by $? or vmsish which
5203 * means that it may not be fatal. So convert
5204 * success/warning codes to fatal.
5206 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5207 STATUS_UNIX_EXIT_SET(255);
5211 /* Traditionally Perl on VMS always expects a Fatal Error. */
5212 if (vaxc$errno & 1) {
5214 /* So force success status to failure */
5215 if (STATUS_NATIVE & 1)
5220 STATUS_UNIX = EINTR; /* In case something cares */
5225 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5227 /* Encode the severity code */
5228 severity = STATUS_NATIVE & STS$M_SEVERITY;
5229 STATUS_UNIX = (severity ? severity : 1) << 8;
5231 /* Perl expects this to be a fatal error */
5232 if (severity != STS$K_SEVERE)
5241 STATUS_UNIX_SET(errno);
5243 exitstatus = STATUS_UNIX >> 8;
5244 if (exitstatus & 255)
5245 STATUS_UNIX_SET(exitstatus);
5247 STATUS_UNIX_SET(255);
5254 S_my_exit_jump(pTHX)
5257 register PERL_CONTEXT *cx;
5262 SvREFCNT_dec(PL_e_script);
5263 PL_e_script = Nullsv;
5266 POPSTACK_TO(PL_mainstack);
5267 if (cxstack_ix >= 0) {
5270 POPBLOCK(cx,PL_curpm);
5275 PERL_UNUSED_VAR(gimme);
5276 PERL_UNUSED_VAR(newsp);
5280 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5282 const char * const p = SvPVX_const(PL_e_script);
5283 const char *nl = strchr(p, '\n');
5285 PERL_UNUSED_ARG(idx);
5286 PERL_UNUSED_ARG(maxlen);
5288 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5290 filter_del(read_e_script);
5293 sv_catpvn(buf_sv, p, nl-p);
5294 sv_chop(PL_e_script, nl);
5300 * c-indentation-style: bsd
5302 * indent-tabs-mode: t
5305 * ex: set ts=8 sts=4 sw=4 noet: