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 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
155 PERL_SET_THX(my_perl);
159 #ifdef PERL_IMPLICIT_SYS
161 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
162 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
163 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
164 struct IPerlDir* ipD, struct IPerlSock* ipS,
165 struct IPerlProc* ipP)
167 PerlInterpreter *my_perl;
168 /* New() needs interpreter, so call malloc() instead */
169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
170 S_init_tls_and_interp(my_perl);
171 Zero(my_perl, 1, PerlInterpreter);
187 =head1 Embedding Functions
189 =for apidoc perl_alloc
191 Allocates a new Perl interpreter. See L<perlembed>.
199 PerlInterpreter *my_perl;
201 /* New() needs interpreter, so call malloc() instead */
202 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
204 S_init_tls_and_interp(my_perl);
205 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
207 #endif /* PERL_IMPLICIT_SYS */
210 =for apidoc perl_construct
212 Initializes a new Perl interpreter. See L<perlembed>.
218 perl_construct(pTHXx)
221 PERL_UNUSED_ARG(my_perl);
224 PL_perl_destruct_level = 1;
226 if (PL_perl_destruct_level > 0)
229 /* Init the real globals (and main thread)? */
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
233 PL_linestr = NEWSV(65,79);
234 sv_upgrade(PL_linestr,SVt_PVIV);
236 if (!SvREADONLY(&PL_sv_undef)) {
237 /* set read-only and try to insure than we wont see REFCNT==0
240 SvREADONLY_on(&PL_sv_undef);
241 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
243 sv_setpv(&PL_sv_no,PL_No);
244 /* value lookup in void context - happens to have the side effect
245 of caching the numeric forms. */
248 SvREADONLY_on(&PL_sv_no);
249 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_yes,PL_Yes);
254 SvREADONLY_on(&PL_sv_yes);
255 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
257 SvREADONLY_on(&PL_sv_placeholder);
258 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
261 PL_sighandlerp = Perl_sighandler;
262 PL_pidstatus = newHV();
265 PL_rs = newSVpvn("\n", 1);
270 PL_lex_state = LEX_NOTPARSING;
276 SET_NUMERIC_STANDARD();
278 #if defined(LOCAL_PATCH_COUNT)
279 PL_localpatches = local_patches; /* For possible -v */
282 #ifdef HAVE_INTERP_INTERN
286 PerlIO_init(aTHX); /* Hook to IO system */
288 PL_fdpid = newAV(); /* for remembering popen pids by fd */
289 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
290 PL_errors = newSVpvn("",0);
291 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
292 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
293 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
295 PL_regex_padav = newAV();
296 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
297 PL_regex_pad = AvARRAY(PL_regex_padav);
299 #ifdef USE_REENTRANT_API
300 Perl_reentrant_init(aTHX);
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
311 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
317 # ifdef USE_ENVIRON_ARRAY
318 PL_origenviron = environ;
322 /* Use sysconf(_SC_CLK_TCK) if available, if not
323 * available or if the sysconf() fails, use the HZ.
324 * BeOS has those, but returns the wrong value.
325 * The HZ if not originally defined has been by now
326 * been defined as CLK_TCK, if available. */
327 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
328 PL_clocktick = sysconf(_SC_CLK_TCK);
329 if (PL_clocktick <= 0)
333 PL_stashcache = newHV();
335 PL_patchlevel = newSVpv(
336 Perl_form(aTHX_ "%d.%d.%d",
339 (int)PERL_SUBVERSION ), 0
343 if (!PL_mmap_page_size) {
344 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
346 SETERRNO(0, SS_NORMAL);
348 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
350 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
352 if ((long) PL_mmap_page_size < 0) {
355 (void) SvUPGRADE(error, SVt_PV);
356 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
359 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
363 # ifdef HAS_GETPAGESIZE
364 PL_mmap_page_size = getpagesize();
366 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
367 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
371 if (PL_mmap_page_size <= 0)
372 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
373 (IV) PL_mmap_page_size);
375 #endif /* HAS_MMAP */
377 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
378 PL_timesbase.tms_utime = 0;
379 PL_timesbase.tms_stime = 0;
380 PL_timesbase.tms_cutime = 0;
381 PL_timesbase.tms_cstime = 0;
388 =for apidoc nothreadhook
390 Stub that provides thread hook for perl_destruct when there are
397 Perl_nothreadhook(pTHX)
402 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
404 Perl_dump_sv_child(pTHX_ SV *sv)
407 const int sock = PL_dumper_fd;
408 const int debug_fd = PerlIO_fileno(Perl_debug_log);
409 union control_un control;
412 struct cmsghdr *cmptr;
414 unsigned char buffer[256];
416 if(sock == -1 || debug_fd == -1)
419 PerlIO_flush(Perl_debug_log);
421 /* All these shenanigans are to pass a file descriptor over to our child for
422 it to dump out to. We can't let it hold open the file descriptor when it
423 forks, as the file descriptor it will dump to can turn out to be one end
424 of pipe that some other process will wait on for EOF. (So as it would
425 be open, the wait would be forever. */
427 msg.msg_control = control.control;
428 msg.msg_controllen = sizeof(control.control);
429 /* We're a connected socket so we don't need a destination */
435 cmptr = CMSG_FIRSTHDR(&msg);
436 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
437 cmptr->cmsg_level = SOL_SOCKET;
438 cmptr->cmsg_type = SCM_RIGHTS;
439 *((int *)CMSG_DATA(cmptr)) = 1;
441 vec[0].iov_base = (void*)&sv;
442 vec[0].iov_len = sizeof(sv);
443 got = sendmsg(sock, &msg, 0);
446 perror("Debug leaking scalars parent sendmsg failed");
449 if(got < sizeof(sv)) {
450 perror("Debug leaking scalars parent short sendmsg");
454 /* Return protocol is
456 unsigned char: length of location string (0 for empty)
457 unsigned char*: string (not terminated)
459 vec[0].iov_base = (void*)&returned_errno;
460 vec[0].iov_len = sizeof(returned_errno);
461 vec[1].iov_base = buffer;
464 got = readv(sock, vec, 2);
467 perror("Debug leaking scalars parent read failed");
468 PerlIO_flush(PerlIO_stderr());
471 if(got < sizeof(returned_errno) + 1) {
472 perror("Debug leaking scalars parent short read");
473 PerlIO_flush(PerlIO_stderr());
478 got = read(sock, buffer + 1, *buffer);
480 perror("Debug leaking scalars parent read 2 failed");
481 PerlIO_flush(PerlIO_stderr());
486 perror("Debug leaking scalars parent short read 2");
487 PerlIO_flush(PerlIO_stderr());
492 if (returned_errno || *buffer) {
493 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
494 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
495 returned_errno, strerror(returned_errno));
501 =for apidoc perl_destruct
503 Shuts down a Perl interpreter. See L<perlembed>.
512 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
514 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
518 PERL_UNUSED_ARG(my_perl);
520 /* wait for all pseudo-forked children to finish */
521 PERL_WAIT_FOR_CHILDREN;
523 destruct_level = PL_perl_destruct_level;
526 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
528 const int i = atoi(s);
529 if (destruct_level < i)
535 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
541 if (PL_endav && !PL_minus_c)
542 call_list(PL_scopestack_ix, PL_endav);
548 /* Need to flush since END blocks can produce output */
551 if (CALL_FPTR(PL_threadhook)(aTHX)) {
552 /* Threads hook has vetoed further cleanup */
553 return STATUS_NATIVE_EXPORT;
556 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
557 if (destruct_level != 0) {
558 /* Fork here to create a child. Our child's job is to preserve the
559 state of scalars prior to destruction, so that we can instruct it
560 to dump any scalars that we later find have leaked.
561 There's no subtlety in this code - it assumes POSIX, and it doesn't
565 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
566 perror("Debug leaking scalars socketpair failed");
572 perror("Debug leaking scalars fork failed");
576 /* We are the child */
577 const int sock = fd[1];
578 const int debug_fd = PerlIO_fileno(Perl_debug_log);
581 /* Our success message is an integer 0, and a char 0 */
582 static const char success[sizeof(int) + 1];
586 /* We need to close all other file descriptors otherwise we end up
587 with interesting hangs, where the parent closes its end of a
588 pipe, and sits waiting for (another) child to terminate. Only
589 that child never terminates, because it never gets EOF, because
590 we also have the far end of the pipe open. We even need to
591 close the debugging fd, because sometimes it happens to be one
592 end of a pipe, and a process is waiting on the other end for
593 EOF. Normally it would be closed at some point earlier in
594 destruction, but if we happen to cause the pipe to remain open,
595 EOF never occurs, and we get an infinite hang. Hence all the
596 games to pass in a file descriptor if it's actually needed. */
598 f = sysconf(_SC_OPEN_MAX);
600 where = "sysconf failed";
611 union control_un control;
614 struct cmsghdr *cmptr;
618 msg.msg_control = control.control;
619 msg.msg_controllen = sizeof(control.control);
620 /* We're a connected socket so we don't need a source */
624 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
626 vec[0].iov_base = (void*)⌖
627 vec[0].iov_len = sizeof(target);
629 got = recvmsg(sock, &msg, 0);
634 where = "recv failed";
637 if(got < sizeof(target)) {
638 where = "short recv";
642 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
646 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
647 where = "wrong cmsg_len";
650 if(cmptr->cmsg_level != SOL_SOCKET) {
651 where = "wrong cmsg_level";
654 if(cmptr->cmsg_type != SCM_RIGHTS) {
655 where = "wrong cmsg_type";
659 got_fd = *(int*)CMSG_DATA(cmptr);
660 /* For our last little bit of trickery, put the file descriptor
661 back into Perl_debug_log, as if we never actually closed it
663 if(got_fd != debug_fd) {
664 if (dup2(got_fd, debug_fd) == -1) {
671 PerlIO_flush(Perl_debug_log);
673 got = write(sock, &success, sizeof(success));
676 where = "write failed";
679 if(got < sizeof(success)) {
680 where = "short write";
687 int send_errno = errno;
688 unsigned char length = (unsigned char) strlen(where);
689 struct iovec failure[3] = {
690 {(void*)&send_errno, sizeof(send_errno)},
692 {(void*)where, length}
694 int got = writev(sock, failure, 3);
695 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
696 in the parent if we try to read from the socketpair after the
697 child has exited, even if there was data to read.
698 So sleep a bit to give the parent a fighting chance of
701 _exit((got == -1) ? errno : 0);
705 PL_dumper_fd = fd[0];
710 /* We must account for everything. */
712 /* Destroy the main CV and syntax tree */
713 /* Do this now, because destroying ops can cause new SVs to be generated
714 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
715 PL_curcop to point to a valid op from which the filename structure
717 PL_curcop = &PL_compiling;
719 /* ensure comppad/curpad to refer to main's pad */
720 if (CvPADLIST(PL_main_cv)) {
721 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
723 op_free(PL_main_root);
724 PL_main_root = Nullop;
726 PL_main_start = Nullop;
727 SvREFCNT_dec(PL_main_cv);
731 /* Tell PerlIO we are about to tear things apart in case
732 we have layers which are using resources that should
736 PerlIO_destruct(aTHX);
738 if (PL_sv_objcount) {
740 * Try to destruct global references. We do this first so that the
741 * destructors and destructees still exist. Some sv's might remain.
742 * Non-referenced objects are on their own.
748 /* unhook hooks which will soon be, or use, destroyed data */
749 SvREFCNT_dec(PL_warnhook);
750 PL_warnhook = Nullsv;
751 SvREFCNT_dec(PL_diehook);
754 /* call exit list functions */
755 while (PL_exitlistlen-- > 0)
756 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
758 Safefree(PL_exitlist);
763 if (destruct_level == 0){
765 DEBUG_P(debprofdump());
767 #if defined(PERLIO_LAYERS)
768 /* No more IO - including error messages ! */
769 PerlIO_cleanup(aTHX);
772 /* The exit() function will do everything that needs doing. */
773 return STATUS_NATIVE_EXPORT;
776 /* jettison our possibly duplicated environment */
777 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
778 * so we certainly shouldn't free it here
781 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
782 if (environ != PL_origenviron && !PL_use_safe_putenv
784 /* only main thread can free environ[0] contents */
785 && PL_curinterp == aTHX
791 for (i = 0; environ[i]; i++)
792 safesysfree(environ[i]);
794 /* Must use safesysfree() when working with environ. */
795 safesysfree(environ);
797 environ = PL_origenviron;
800 #endif /* !PERL_MICRO */
802 /* reset so print() ends up where we expect */
806 /* the syntax tree is shared between clones
807 * so op_free(PL_main_root) only ReREFCNT_dec's
808 * REGEXPs in the parent interpreter
809 * we need to manually ReREFCNT_dec for the clones
812 I32 i = AvFILLp(PL_regex_padav) + 1;
813 SV **ary = AvARRAY(PL_regex_padav);
818 if (SvFLAGS(resv) & SVf_BREAK) {
819 /* this is PL_reg_curpm, already freed
820 * flag is set in regexec.c:S_regtry
822 SvFLAGS(resv) &= ~SVf_BREAK;
824 else if(SvREPADTMP(resv)) {
825 SvREPADTMP_off(resv);
827 else if(SvIOKp(resv)) {
828 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
833 SvREFCNT_dec(PL_regex_padav);
834 PL_regex_padav = Nullav;
838 SvREFCNT_dec((SV*) PL_stashcache);
839 PL_stashcache = NULL;
841 /* loosen bonds of global variables */
844 (void)PerlIO_close(PL_rsfp);
848 /* Filters for program text */
849 SvREFCNT_dec(PL_rsfp_filters);
850 PL_rsfp_filters = Nullav;
853 PL_preprocess = FALSE;
859 PL_doswitches = FALSE;
860 PL_dowarn = G_WARN_OFF;
861 PL_doextract = FALSE;
862 PL_sawampersand = FALSE; /* must save all match strings */
865 Safefree(PL_inplace);
867 SvREFCNT_dec(PL_patchlevel);
870 SvREFCNT_dec(PL_e_script);
871 PL_e_script = Nullsv;
876 /* magical thingies */
878 SvREFCNT_dec(PL_ofs_sv); /* $, */
881 SvREFCNT_dec(PL_ors_sv); /* $\ */
884 SvREFCNT_dec(PL_rs); /* $/ */
887 PL_multiline = 0; /* $* */
888 Safefree(PL_osname); /* $^O */
891 SvREFCNT_dec(PL_statname);
892 PL_statname = Nullsv;
895 /* defgv, aka *_ should be taken care of elsewhere */
897 /* clean up after study() */
898 SvREFCNT_dec(PL_lastscream);
899 PL_lastscream = Nullsv;
900 Safefree(PL_screamfirst);
902 Safefree(PL_screamnext);
906 Safefree(PL_efloatbuf);
907 PL_efloatbuf = Nullch;
910 /* startup and shutdown function lists */
911 SvREFCNT_dec(PL_beginav);
912 SvREFCNT_dec(PL_beginav_save);
913 SvREFCNT_dec(PL_endav);
914 SvREFCNT_dec(PL_checkav);
915 SvREFCNT_dec(PL_checkav_save);
916 SvREFCNT_dec(PL_initav);
918 PL_beginav_save = Nullav;
921 PL_checkav_save = Nullav;
924 /* shortcuts just get cleared */
930 PL_argvoutgv = Nullgv;
932 PL_stderrgv = Nullgv;
933 PL_last_in_gv = Nullgv;
938 PL_DBsingle = Nullsv;
940 PL_DBsignal = Nullsv;
941 PL_DBassertion = Nullsv;
944 PL_debstash = Nullhv;
946 SvREFCNT_dec(PL_argvout_stack);
947 PL_argvout_stack = Nullav;
949 SvREFCNT_dec(PL_modglobal);
950 PL_modglobal = Nullhv;
951 SvREFCNT_dec(PL_preambleav);
952 PL_preambleav = Nullav;
953 SvREFCNT_dec(PL_subname);
955 SvREFCNT_dec(PL_linestr);
957 SvREFCNT_dec(PL_pidstatus);
958 PL_pidstatus = Nullhv;
959 SvREFCNT_dec(PL_toptarget);
960 PL_toptarget = Nullsv;
961 SvREFCNT_dec(PL_bodytarget);
962 PL_bodytarget = Nullsv;
963 PL_formtarget = Nullsv;
965 /* free locale stuff */
966 #ifdef USE_LOCALE_COLLATE
967 Safefree(PL_collation_name);
968 PL_collation_name = Nullch;
971 #ifdef USE_LOCALE_NUMERIC
972 Safefree(PL_numeric_name);
973 PL_numeric_name = Nullch;
974 SvREFCNT_dec(PL_numeric_radix_sv);
975 PL_numeric_radix_sv = Nullsv;
978 /* clear utf8 character classes */
979 SvREFCNT_dec(PL_utf8_alnum);
980 SvREFCNT_dec(PL_utf8_alnumc);
981 SvREFCNT_dec(PL_utf8_ascii);
982 SvREFCNT_dec(PL_utf8_alpha);
983 SvREFCNT_dec(PL_utf8_space);
984 SvREFCNT_dec(PL_utf8_cntrl);
985 SvREFCNT_dec(PL_utf8_graph);
986 SvREFCNT_dec(PL_utf8_digit);
987 SvREFCNT_dec(PL_utf8_upper);
988 SvREFCNT_dec(PL_utf8_lower);
989 SvREFCNT_dec(PL_utf8_print);
990 SvREFCNT_dec(PL_utf8_punct);
991 SvREFCNT_dec(PL_utf8_xdigit);
992 SvREFCNT_dec(PL_utf8_mark);
993 SvREFCNT_dec(PL_utf8_toupper);
994 SvREFCNT_dec(PL_utf8_totitle);
995 SvREFCNT_dec(PL_utf8_tolower);
996 SvREFCNT_dec(PL_utf8_tofold);
997 SvREFCNT_dec(PL_utf8_idstart);
998 SvREFCNT_dec(PL_utf8_idcont);
999 PL_utf8_alnum = Nullsv;
1000 PL_utf8_alnumc = Nullsv;
1001 PL_utf8_ascii = Nullsv;
1002 PL_utf8_alpha = Nullsv;
1003 PL_utf8_space = Nullsv;
1004 PL_utf8_cntrl = Nullsv;
1005 PL_utf8_graph = Nullsv;
1006 PL_utf8_digit = Nullsv;
1007 PL_utf8_upper = Nullsv;
1008 PL_utf8_lower = Nullsv;
1009 PL_utf8_print = Nullsv;
1010 PL_utf8_punct = Nullsv;
1011 PL_utf8_xdigit = Nullsv;
1012 PL_utf8_mark = Nullsv;
1013 PL_utf8_toupper = Nullsv;
1014 PL_utf8_totitle = Nullsv;
1015 PL_utf8_tolower = Nullsv;
1016 PL_utf8_tofold = Nullsv;
1017 PL_utf8_idstart = Nullsv;
1018 PL_utf8_idcont = Nullsv;
1020 if (!specialWARN(PL_compiling.cop_warnings))
1021 SvREFCNT_dec(PL_compiling.cop_warnings);
1022 PL_compiling.cop_warnings = Nullsv;
1023 if (!specialCopIO(PL_compiling.cop_io))
1024 SvREFCNT_dec(PL_compiling.cop_io);
1025 PL_compiling.cop_io = Nullsv;
1026 CopFILE_free(&PL_compiling);
1027 CopSTASH_free(&PL_compiling);
1029 /* Prepare to destruct main symbol table. */
1034 SvREFCNT_dec(PL_curstname);
1035 PL_curstname = Nullsv;
1037 /* clear queued errors */
1038 SvREFCNT_dec(PL_errors);
1042 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1043 if (PL_scopestack_ix != 0)
1044 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1045 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1046 (long)PL_scopestack_ix);
1047 if (PL_savestack_ix != 0)
1048 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1049 "Unbalanced saves: %ld more saves than restores\n",
1050 (long)PL_savestack_ix);
1051 if (PL_tmps_floor != -1)
1052 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1053 (long)PL_tmps_floor + 1);
1054 if (cxstack_ix != -1)
1055 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1056 (long)cxstack_ix + 1);
1059 /* Now absolutely destruct everything, somehow or other, loops or no. */
1060 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1061 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1063 /* the 2 is for PL_fdpid and PL_strtab */
1064 while (PL_sv_count > 2 && sv_clean_all())
1067 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1068 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1069 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1070 SvFLAGS(PL_strtab) |= SVt_PVHV;
1072 AvREAL_off(PL_fdpid); /* no surviving entries */
1073 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1076 #ifdef HAVE_INTERP_INTERN
1080 /* Destruct the global string table. */
1082 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1083 * so that sv_free() won't fail on them.
1084 * Now that the global string table is using a single hunk of memory
1085 * for both HE and HEK, we either need to explicitly unshare it the
1086 * correct way, or actually free things here.
1089 const I32 max = HvMAX(PL_strtab);
1090 HE **array = HvARRAY(PL_strtab);
1091 HE *hent = array[0];
1094 if (hent && ckWARN_d(WARN_INTERNAL)) {
1095 HE *next = HeNEXT(hent);
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1097 "Unbalanced string table refcount: (%d) for \"%s\"",
1098 HeVAL(hent) - Nullsv, HeKEY(hent));
1105 hent = array[riter];
1110 HvARRAY(PL_strtab) = 0;
1111 HvTOTALKEYS(PL_strtab) = 0;
1112 HvFILL(PL_strtab) = 0;
1114 SvREFCNT_dec(PL_strtab);
1117 /* free the pointer tables used for cloning */
1118 ptr_table_free(PL_ptr_table);
1119 PL_ptr_table = (PTR_TBL_t*)NULL;
1122 /* free special SVs */
1124 SvREFCNT(&PL_sv_yes) = 0;
1125 sv_clear(&PL_sv_yes);
1126 SvANY(&PL_sv_yes) = NULL;
1127 SvFLAGS(&PL_sv_yes) = 0;
1129 SvREFCNT(&PL_sv_no) = 0;
1130 sv_clear(&PL_sv_no);
1131 SvANY(&PL_sv_no) = NULL;
1132 SvFLAGS(&PL_sv_no) = 0;
1136 for (i=0; i<=2; i++) {
1137 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1138 sv_clear(PERL_DEBUG_PAD(i));
1139 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1140 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1144 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1145 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1147 #ifdef DEBUG_LEAKING_SCALARS
1148 if (PL_sv_count != 0) {
1153 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1154 svend = &sva[SvREFCNT(sva)];
1155 for (sv = sva + 1; sv < svend; ++sv) {
1156 if (SvTYPE(sv) != SVTYPEMASK) {
1157 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1159 " refcnt=%"UVuf pTHX__FORMAT "\n"
1160 "\tallocated at %s:%d %s %s%s\n",
1161 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1162 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1164 sv->sv_debug_inpad ? "for" : "by",
1165 sv->sv_debug_optype ?
1166 PL_op_name[sv->sv_debug_optype]: "(none)",
1167 sv->sv_debug_cloned ? " (cloned)" : ""
1169 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1170 Perl_dump_sv_child(aTHX_ sv);
1176 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1180 /* Wait for up to 4 seconds for child to terminate.
1181 This seems to be the least effort way of timing out on reaping
1183 struct timeval waitfor = {4, 0};
1184 int sock = PL_dumper_fd;
1188 FD_SET(sock, &rset);
1189 select(sock + 1, &rset, NULL, NULL, &waitfor);
1190 waitpid(child, &status, WNOHANG);
1198 #if defined(PERLIO_LAYERS)
1199 /* No more IO - including error messages ! */
1200 PerlIO_cleanup(aTHX);
1203 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1204 as currently layers use it rather than Nullsv as a marker
1205 for no arg - and will try and SvREFCNT_dec it.
1207 SvREFCNT(&PL_sv_undef) = 0;
1208 SvREADONLY_off(&PL_sv_undef);
1210 Safefree(PL_origfilename);
1211 PL_origfilename = Nullch;
1212 Safefree(PL_reg_start_tmp);
1213 PL_reg_start_tmp = (char**)NULL;
1214 PL_reg_start_tmpl = 0;
1216 Safefree(PL_reg_curpm);
1217 Safefree(PL_reg_poscache);
1218 free_tied_hv_pool();
1219 Safefree(PL_op_mask);
1220 Safefree(PL_psig_ptr);
1221 PL_psig_ptr = (SV**)NULL;
1222 Safefree(PL_psig_name);
1223 PL_psig_name = (SV**)NULL;
1224 Safefree(PL_bitcount);
1225 PL_bitcount = Nullch;
1226 Safefree(PL_psig_pend);
1227 PL_psig_pend = (int*)NULL;
1228 PL_formfeed = Nullsv;
1230 PL_tainting = FALSE;
1231 PL_taint_warn = FALSE;
1232 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1235 DEBUG_P(debprofdump());
1237 #ifdef USE_REENTRANT_API
1238 Perl_reentrant_free(aTHX);
1243 /* As the absolutely last thing, free the non-arena SV for mess() */
1246 /* we know that type == SVt_PVMG */
1248 /* it could have accumulated taint magic */
1251 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1252 moremagic = mg->mg_moremagic;
1253 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1255 Safefree(mg->mg_ptr);
1259 /* we know that type >= SVt_PV */
1260 SvPV_free(PL_mess_sv);
1261 Safefree(SvANY(PL_mess_sv));
1262 Safefree(PL_mess_sv);
1263 PL_mess_sv = Nullsv;
1265 return STATUS_NATIVE_EXPORT;
1269 =for apidoc perl_free
1271 Releases a Perl interpreter. See L<perlembed>.
1279 #if defined(WIN32) || defined(NETWARE)
1280 # if defined(PERL_IMPLICIT_SYS)
1282 void *host = nw_internal_host;
1284 void *host = w32_internal_host;
1286 PerlMem_free(aTHXx);
1288 nw_delete_internal_host(host);
1290 win32_delete_internal_host(host);
1293 PerlMem_free(aTHXx);
1296 PerlMem_free(aTHXx);
1300 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1301 /* provide destructors to clean up the thread key when libperl is unloaded */
1302 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1304 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1305 #pragma fini "perl_fini"
1309 #if defined(__GNUC__)
1310 __attribute__((destructor))
1320 #endif /* THREADS */
1323 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1325 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1326 PL_exitlist[PL_exitlistlen].fn = fn;
1327 PL_exitlist[PL_exitlistlen].ptr = ptr;
1331 #ifdef HAS_PROCSELFEXE
1332 /* This is a function so that we don't hold on to MAXPATHLEN
1333 bytes of stack longer than necessary
1336 S_procself_val(pTHX_ SV *sv, const char *arg0)
1338 char buf[MAXPATHLEN];
1339 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1341 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1342 includes a spurious NUL which will cause $^X to fail in system
1343 or backticks (this will prevent extensions from being built and
1344 many tests from working). readlink is not meant to add a NUL.
1345 Normal readlink works fine.
1347 if (len > 0 && buf[len-1] == '\0') {
1351 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1352 returning the text "unknown" from the readlink rather than the path
1353 to the executable (or returning an error from the readlink). Any valid
1354 path has a '/' in it somewhere, so use that to validate the result.
1355 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1357 if (len > 0 && memchr(buf, '/', len)) {
1358 sv_setpvn(sv,buf,len);
1364 #endif /* HAS_PROCSELFEXE */
1367 S_set_caret_X(pTHX) {
1368 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1370 #ifdef HAS_PROCSELFEXE
1371 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1374 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1376 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1383 =for apidoc perl_parse
1385 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1391 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1398 PERL_UNUSED_VAR(my_perl);
1400 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1403 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1404 setuid perl scripts securely.\n");
1405 #endif /* IAMSUID */
1408 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1409 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1410 * This MUST be done before any hash stores or fetches take place.
1411 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1412 * yourself, it is your responsibility to provide a good random seed!
1413 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1414 if (!PL_rehash_seed_set)
1415 PL_rehash_seed = get_hash_seed();
1417 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1419 if (s && (atoi(s) == 1))
1420 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1422 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1428 /* Set PL_origalen be the sum of the contiguous argv[]
1429 * elements plus the size of the env in case that it is
1430 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1431 * as the maximum modifiable length of $0. In the worst case
1432 * the area we are able to modify is limited to the size of
1433 * the original argv[0]. (See below for 'contiguous', though.)
1435 const char *s = NULL;
1438 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1439 /* Do the mask check only if the args seem like aligned. */
1441 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1443 /* See if all the arguments are contiguous in memory. Note
1444 * that 'contiguous' is a loose term because some platforms
1445 * align the argv[] and the envp[]. If the arguments look
1446 * like non-aligned, assume that they are 'strictly' or
1447 * 'traditionally' contiguous. If the arguments look like
1448 * aligned, we just check that they are within aligned
1449 * PTRSIZE bytes. As long as no system has something bizarre
1450 * like the argv[] interleaved with some other data, we are
1451 * fine. (Did I just evoke Murphy's Law?) --jhi */
1452 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1454 for (i = 1; i < PL_origargc; i++) {
1455 if ((PL_origargv[i] == s + 1
1457 || PL_origargv[i] == s + 2
1462 (PL_origargv[i] > s &&
1464 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1474 /* Can we grab env area too to be used as the area for $0? */
1475 if (PL_origenviron) {
1476 if ((PL_origenviron[0] == s + 1
1478 || (PL_origenviron[0] == s + 9 && (s += 8))
1483 (PL_origenviron[0] > s &&
1484 PL_origenviron[0] <=
1485 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1489 s = PL_origenviron[0];
1492 my_setenv("NoNe SuCh", Nullch);
1493 /* Force copy of environment. */
1494 for (i = 1; PL_origenviron[i]; i++) {
1495 if (PL_origenviron[i] == s + 1
1498 (PL_origenviron[i] > s &&
1499 PL_origenviron[i] <=
1500 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1503 s = PL_origenviron[i];
1511 PL_origalen = s - PL_origargv[0] + 1;
1516 /* Come here if running an undumped a.out. */
1518 PL_origfilename = savepv(argv[0]);
1519 PL_do_undump = FALSE;
1520 cxstack_ix = -1; /* start label stack again */
1522 assert (!PL_tainted);
1524 S_set_caret_X(aTHX);
1526 init_postdump_symbols(argc,argv,env);
1531 op_free(PL_main_root);
1532 PL_main_root = Nullop;
1534 PL_main_start = Nullop;
1535 SvREFCNT_dec(PL_main_cv);
1536 PL_main_cv = Nullcv;
1539 oldscope = PL_scopestack_ix;
1540 PL_dowarn = G_WARN_OFF;
1545 parse_body(env,xsinit);
1547 call_list(oldscope, PL_checkav);
1554 /* my_exit() was called */
1555 while (PL_scopestack_ix > oldscope)
1558 PL_curstash = PL_defstash;
1560 call_list(oldscope, PL_checkav);
1561 ret = STATUS_NATIVE_EXPORT;
1564 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1573 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1576 int argc = PL_origargc;
1577 char **argv = PL_origargv;
1578 const char *scriptname = NULL;
1579 VOL bool dosearch = FALSE;
1580 const char *validarg = "";
1583 const char *cddir = Nullch;
1584 #ifdef USE_SITECUSTOMIZE
1585 bool minus_f = FALSE;
1590 sv_setpvn(PL_linestr,"",0);
1591 sv = newSVpvn("",0); /* first used for -I flags */
1595 for (argc--,argv++; argc > 0; argc--,argv++) {
1596 if (argv[0][0] != '-' || !argv[0][1])
1600 validarg = " PHOOEY ";
1604 * Can we rely on the kernel to start scripts with argv[1] set to
1605 * contain all #! line switches (the whole line)? (argv[0] is set to
1606 * the interpreter name, argv[2] to the script name; argv[3] and
1607 * above may contain other arguments.)
1614 #ifndef PERL_STRICT_CR
1639 if ((s = moreswitches(s)))
1644 CHECK_MALLOC_TOO_LATE_FOR('t');
1645 if( !PL_tainting ) {
1646 PL_taint_warn = TRUE;
1652 CHECK_MALLOC_TOO_LATE_FOR('T');
1654 PL_taint_warn = FALSE;
1659 #ifdef MACOS_TRADITIONAL
1660 /* ignore -e for Dev:Pseudo argument */
1661 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1666 PL_e_script = newSVpvn("",0);
1667 filter_add(read_e_script, NULL);
1670 sv_catpv(PL_e_script, s);
1672 sv_catpv(PL_e_script, argv[1]);
1676 Perl_croak(aTHX_ "No code specified for -e");
1677 sv_catpv(PL_e_script, "\n");
1681 #ifdef USE_SITECUSTOMIZE
1687 case 'I': /* -I handled both here and in moreswitches() */
1689 if (!*++s && (s=argv[1]) != Nullch) {
1694 STRLEN len = strlen(s);
1695 p = savepvn(s, len);
1696 incpush(p, TRUE, TRUE, FALSE, FALSE);
1697 sv_catpvn(sv, "-I", 2);
1698 sv_catpvn(sv, p, len);
1699 sv_catpvn(sv, " ", 1);
1703 Perl_croak(aTHX_ "No directory specified for -I");
1707 PL_preprocess = TRUE;
1717 PL_preambleav = newAV();
1718 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
1722 PL_Sv = newSVpv("print myconfig();",0);
1724 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
1726 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
1728 opts = SvCUR(PL_Sv);
1730 sv_catpv(PL_Sv,"\" Compile-time options:");
1732 sv_catpv(PL_Sv," DEBUGGING");
1734 # ifdef MULTIPLICITY
1735 sv_catpv(PL_Sv," MULTIPLICITY");
1737 # ifdef USE_5005THREADS
1738 sv_catpv(PL_Sv," USE_5005THREADS");
1740 # ifdef USE_ITHREADS
1741 sv_catpv(PL_Sv," USE_ITHREADS");
1743 # ifdef USE_64_BIT_INT
1744 sv_catpv(PL_Sv," USE_64_BIT_INT");
1746 # ifdef USE_64_BIT_ALL
1747 sv_catpv(PL_Sv," USE_64_BIT_ALL");
1749 # ifdef USE_LONG_DOUBLE
1750 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1752 # ifdef USE_LARGE_FILES
1753 sv_catpv(PL_Sv," USE_LARGE_FILES");
1756 sv_catpv(PL_Sv," USE_SOCKS");
1758 # ifdef USE_SITECUSTOMIZE
1759 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1761 # ifdef PERL_IMPLICIT_CONTEXT
1762 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1764 # ifdef PERL_IMPLICIT_SYS
1765 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1768 while (SvCUR(PL_Sv) > opts+76) {
1769 /* find last space after "options: " and before col 76 */
1772 char *pv = SvPV_nolen(PL_Sv);
1773 const char c = pv[opts+76];
1775 space = strrchr(pv+opts+26, ' ');
1777 if (!space) break; /* "Can't happen" */
1779 /* break the line before that space */
1782 sv_insert(PL_Sv, opts, 0,
1786 sv_catpv(PL_Sv,"\\n\",");
1788 #if defined(LOCAL_PATCH_COUNT)
1789 if (LOCAL_PATCH_COUNT > 0) {
1791 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
1792 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1793 if (PL_localpatches[i])
1794 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1795 0, PL_localpatches[i], 0);
1799 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
1802 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
1804 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
1807 sv_catpv(PL_Sv, "; \
1809 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1812 push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1815 print \" \\%ENV:\\n @env\\n\" if @env; \
1816 print \" \\@INC:\\n @INC\\n\";");
1819 PL_Sv = newSVpv("config_vars(qw(",0);
1820 sv_catpv(PL_Sv, ++s);
1821 sv_catpv(PL_Sv, "))");
1824 av_push(PL_preambleav, PL_Sv);
1825 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1828 PL_doextract = TRUE;
1836 if (!*++s || isSPACE(*s)) {
1840 /* catch use of gnu style long options */
1841 if (strEQ(s, "version")) {
1845 if (strEQ(s, "help")) {
1852 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1858 #ifndef SECURE_INTERNAL_GETENV
1861 (s = PerlEnv_getenv("PERL5OPT")))
1863 const char *popt = s;
1866 if (*s == '-' && *(s+1) == 'T') {
1867 CHECK_MALLOC_TOO_LATE_FOR('T');
1869 PL_taint_warn = FALSE;
1872 char *popt_copy = Nullch;
1885 if (!strchr("DIMUdmtwA", *s))
1886 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1890 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1891 s = popt_copy + (s - popt);
1892 d = popt_copy + (d - popt);
1899 if( !PL_tainting ) {
1900 PL_taint_warn = TRUE;
1910 #ifdef USE_SITECUSTOMIZE
1913 PL_preambleav = newAV();
1914 av_unshift(PL_preambleav, 1);
1915 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1919 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1920 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1924 scriptname = argv[0];
1927 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1929 else if (scriptname == Nullch) {
1931 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1937 /* Set $^X early so that it can be used for relocatable paths in @INC */
1938 assert (!PL_tainted);
1940 S_set_caret_X(aTHX);
1944 open_script(scriptname,dosearch,sv);
1946 validate_suid(validarg, scriptname);
1949 #if defined(SIGCHLD) || defined(SIGCLD)
1952 # define SIGCHLD SIGCLD
1954 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1955 if (sigstate == SIG_IGN) {
1956 if (ckWARN(WARN_SIGNAL))
1957 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1958 "Can't ignore signal CHLD, forcing to default");
1959 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1965 #ifdef MACOS_TRADITIONAL
1966 if (PL_doextract || gMacPerl_AlwaysExtract) {
1971 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
1972 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1976 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1977 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1978 CvUNIQUE_on(PL_compcv);
1980 CvPADLIST(PL_compcv) = pad_new(0);
1981 #ifdef USE_5005THREADS
1982 CvOWNER(PL_compcv) = 0;
1983 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1984 MUTEX_INIT(CvMUTEXP(PL_compcv));
1985 #endif /* USE_5005THREADS */
1988 boot_core_UNIVERSAL();
1989 boot_core_xsutils();
1992 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
1994 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2000 # ifdef HAS_SOCKS5_INIT
2001 socks5_init(argv[0]);
2007 init_predump_symbols();
2008 /* init_postdump_symbols not currently designed to be called */
2009 /* more than once (ENV isn't cleared first, for example) */
2010 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2012 init_postdump_symbols(argc,argv,env);
2014 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2015 * or explicitly in some platforms.
2016 * locale.c:Perl_init_i18nl10n() if the environment
2017 * look like the user wants to use UTF-8. */
2018 #if defined(SYMBIAN)
2019 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2022 /* Requires init_predump_symbols(). */
2023 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2028 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2029 * and the default open disciplines. */
2030 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2031 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2033 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2034 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2035 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2037 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2038 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2039 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2041 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2042 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2043 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2044 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2045 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2048 sv_setpvn(sv, ":utf8\0:utf8", 11);
2050 sv_setpvn(sv, ":utf8\0", 6);
2053 sv_setpvn(sv, "\0:utf8", 6);
2059 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2060 if (strEQ(s, "unsafe"))
2061 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2062 else if (strEQ(s, "safe"))
2063 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2065 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2070 /* now parse the script */
2072 SETERRNO(0,SS_NORMAL);
2074 #ifdef MACOS_TRADITIONAL
2075 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2077 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2079 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2080 MacPerl_MPWFileName(PL_origfilename));
2084 if (yyparse() || PL_error_count) {
2086 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2088 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2093 CopLINE_set(PL_curcop, 0);
2094 PL_curstash = PL_defstash;
2095 PL_preprocess = FALSE;
2097 SvREFCNT_dec(PL_e_script);
2098 PL_e_script = Nullsv;
2105 SAVECOPFILE(PL_curcop);
2106 SAVECOPLINE(PL_curcop);
2107 gv_check(PL_defstash);
2114 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2115 dump_mstats("after compilation:");
2124 =for apidoc perl_run
2126 Tells a Perl interpreter to run. See L<perlembed>.
2138 PERL_UNUSED_ARG(my_perl);
2140 oldscope = PL_scopestack_ix;
2148 cxstack_ix = -1; /* start context stack again */
2150 case 0: /* normal completion */
2154 case 2: /* my_exit() */
2155 while (PL_scopestack_ix > oldscope)
2158 PL_curstash = PL_defstash;
2159 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2160 PL_endav && !PL_minus_c)
2161 call_list(oldscope, PL_endav);
2163 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2164 dump_mstats("after execution: ");
2166 ret = STATUS_NATIVE_EXPORT;
2170 POPSTACK_TO(PL_mainstack);
2173 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2185 S_run_body(pTHX_ I32 oldscope)
2187 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2188 PL_sawampersand ? "Enabling" : "Omitting"));
2190 if (!PL_restartop) {
2191 DEBUG_x(dump_all());
2193 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2194 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2198 #ifdef MACOS_TRADITIONAL
2199 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2200 (gMacPerl_ErrorFormat ? "# " : ""),
2201 MacPerl_MPWFileName(PL_origfilename));
2203 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2207 if (PERLDB_SINGLE && PL_DBsingle)
2208 sv_setiv(PL_DBsingle, 1);
2210 call_list(oldscope, PL_initav);
2216 PL_op = PL_restartop;
2220 else if (PL_main_start) {
2221 CvDEPTH(PL_main_cv) = 1;
2222 PL_op = PL_main_start;
2230 =head1 SV Manipulation Functions
2232 =for apidoc p||get_sv
2234 Returns the SV of the specified Perl scalar. If C<create> is set and the
2235 Perl variable does not exist then it will be created. If C<create> is not
2236 set and the variable does not exist then NULL is returned.
2242 Perl_get_sv(pTHX_ const char *name, I32 create)
2245 #ifdef USE_5005THREADS
2246 if (name[1] == '\0' && !isALPHA(name[0])) {
2247 PADOFFSET tmp = find_threadsv(name);
2248 if (tmp != NOT_IN_PAD)
2249 return THREADSV(tmp);
2251 #endif /* USE_5005THREADS */
2252 gv = gv_fetchpv(name, create, SVt_PV);
2259 =head1 Array Manipulation Functions
2261 =for apidoc p||get_av
2263 Returns the AV of the specified Perl array. If C<create> is set and the
2264 Perl variable does not exist then it will be created. If C<create> is not
2265 set and the variable does not exist then NULL is returned.
2271 Perl_get_av(pTHX_ const char *name, I32 create)
2273 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2282 =head1 Hash Manipulation Functions
2284 =for apidoc p||get_hv
2286 Returns the HV of the specified Perl hash. If C<create> is set and the
2287 Perl variable does not exist then it will be created. If C<create> is not
2288 set and the variable does not exist then NULL is returned.
2294 Perl_get_hv(pTHX_ const char *name, I32 create)
2296 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
2305 =head1 CV Manipulation Functions
2307 =for apidoc p||get_cv
2309 Returns the CV of the specified Perl subroutine. If C<create> is set and
2310 the Perl subroutine does not exist then it will be declared (which has the
2311 same effect as saying C<sub name;>). If C<create> is not set and the
2312 subroutine does not exist then NULL is returned.
2318 Perl_get_cv(pTHX_ const char *name, I32 create)
2320 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2321 /* XXX unsafe for threads if eval_owner isn't held */
2322 /* XXX this is probably not what they think they're getting.
2323 * It has the same effect as "sub name;", i.e. just a forward
2325 if (create && !GvCVu(gv))
2326 return newSUB(start_subparse(FALSE, 0),
2327 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2335 /* Be sure to refetch the stack pointer after calling these routines. */
2339 =head1 Callback Functions
2341 =for apidoc p||call_argv
2343 Performs a callback to the specified Perl sub. See L<perlcall>.
2349 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2351 /* See G_* flags in cop.h */
2352 /* null terminated arg list */
2359 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2364 return call_pv(sub_name, flags);
2368 =for apidoc p||call_pv
2370 Performs a callback to the specified Perl sub. See L<perlcall>.
2376 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2377 /* name of the subroutine */
2378 /* See G_* flags in cop.h */
2380 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2384 =for apidoc p||call_method
2386 Performs a callback to the specified Perl method. The blessed object must
2387 be on the stack. See L<perlcall>.
2393 Perl_call_method(pTHX_ const char *methname, I32 flags)
2394 /* name of the subroutine */
2395 /* See G_* flags in cop.h */
2397 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2400 /* May be called with any of a CV, a GV, or an SV containing the name. */
2402 =for apidoc p||call_sv
2404 Performs a callback to the Perl sub whose name is in the SV. See
2411 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2412 /* See G_* flags in cop.h */
2415 LOGOP myop; /* fake syntax tree node */
2418 volatile I32 retval = 0;
2420 bool oldcatch = CATCH_GET;
2425 if (flags & G_DISCARD) {
2430 Zero(&myop, 1, LOGOP);
2431 myop.op_next = Nullop;
2432 if (!(flags & G_NOARGS))
2433 myop.op_flags |= OPf_STACKED;
2434 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2435 (flags & G_ARRAY) ? OPf_WANT_LIST :
2440 EXTEND(PL_stack_sp, 1);
2441 *++PL_stack_sp = sv;
2443 oldscope = PL_scopestack_ix;
2445 if (PERLDB_SUB && PL_curstash != PL_debstash
2446 /* Handle first BEGIN of -d. */
2447 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2448 /* Try harder, since this may have been a sighandler, thus
2449 * curstash may be meaningless. */
2450 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2451 && !(flags & G_NODEBUG))
2452 PL_op->op_private |= OPpENTERSUB_DB;
2454 if (flags & G_METHOD) {
2455 Zero(&method_op, 1, UNOP);
2456 method_op.op_next = PL_op;
2457 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2458 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2459 PL_op = (OP*)&method_op;
2462 if (!(flags & G_EVAL)) {
2464 call_body((OP*)&myop, FALSE);
2465 retval = PL_stack_sp - (PL_stack_base + oldmark);
2466 CATCH_SET(oldcatch);
2469 myop.op_other = (OP*)&myop;
2471 /* we're trying to emulate pp_entertry() here */
2473 register PERL_CONTEXT *cx;
2474 const I32 gimme = GIMME_V;
2479 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2481 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2483 PL_in_eval = EVAL_INEVAL;
2484 if (flags & G_KEEPERR)
2485 PL_in_eval |= EVAL_KEEPERR;
2487 sv_setpvn(ERRSV,"",0);
2495 call_body((OP*)&myop, FALSE);
2496 retval = PL_stack_sp - (PL_stack_base + oldmark);
2497 if (!(flags & G_KEEPERR))
2498 sv_setpvn(ERRSV,"",0);
2504 /* my_exit() was called */
2505 PL_curstash = PL_defstash;
2508 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2509 Perl_croak(aTHX_ "Callback called exit");
2514 PL_op = PL_restartop;
2518 PL_stack_sp = PL_stack_base + oldmark;
2519 if (flags & G_ARRAY)
2523 *++PL_stack_sp = &PL_sv_undef;
2528 if (PL_scopestack_ix > oldscope) {
2532 register PERL_CONTEXT *cx;
2539 PERL_UNUSED_VAR(newsp);
2540 PERL_UNUSED_VAR(gimme);
2541 PERL_UNUSED_VAR(optype);
2546 if (flags & G_DISCARD) {
2547 PL_stack_sp = PL_stack_base + oldmark;
2557 S_call_body(pTHX_ const OP *myop, bool is_eval)
2559 if (PL_op == myop) {
2561 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2563 PL_op = Perl_pp_entersub(aTHX); /* this does */
2569 /* Eval a string. The G_EVAL flag is always assumed. */
2572 =for apidoc p||eval_sv
2574 Tells Perl to C<eval> the string in the SV.
2580 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2582 /* See G_* flags in cop.h */
2585 UNOP myop; /* fake syntax tree node */
2586 volatile I32 oldmark = SP - PL_stack_base;
2587 volatile I32 retval = 0;
2592 if (flags & G_DISCARD) {
2599 Zero(PL_op, 1, UNOP);
2600 EXTEND(PL_stack_sp, 1);
2601 *++PL_stack_sp = sv;
2603 if (!(flags & G_NOARGS))
2604 myop.op_flags = OPf_STACKED;
2605 myop.op_next = Nullop;
2606 myop.op_type = OP_ENTEREVAL;
2607 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2608 (flags & G_ARRAY) ? OPf_WANT_LIST :
2610 if (flags & G_KEEPERR)
2611 myop.op_flags |= OPf_SPECIAL;
2613 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2614 * before a PUSHEVAL, which corrupts the stack after a croak */
2615 TAINT_PROPER("eval_sv()");
2621 call_body((OP*)&myop,TRUE);
2622 retval = PL_stack_sp - (PL_stack_base + oldmark);
2623 if (!(flags & G_KEEPERR))
2624 sv_setpvn(ERRSV,"",0);
2630 /* my_exit() was called */
2631 PL_curstash = PL_defstash;
2634 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2635 Perl_croak(aTHX_ "Callback called exit");
2640 PL_op = PL_restartop;
2644 PL_stack_sp = PL_stack_base + oldmark;
2645 if (flags & G_ARRAY)
2649 *++PL_stack_sp = &PL_sv_undef;
2655 if (flags & G_DISCARD) {
2656 PL_stack_sp = PL_stack_base + oldmark;
2666 =for apidoc p||eval_pv
2668 Tells Perl to C<eval> the given string and return an SV* result.
2674 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2677 SV* sv = newSVpv(p, 0);
2679 eval_sv(sv, G_SCALAR);
2686 if (croak_on_error && SvTRUE(ERRSV)) {
2687 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2693 /* Require a module. */
2696 =head1 Embedding Functions
2698 =for apidoc p||require_pv
2700 Tells Perl to C<require> the file named by the string argument. It is
2701 analogous to the Perl code C<eval "require '$file'">. It's even
2702 implemented that way; consider using load_module instead.
2707 Perl_require_pv(pTHX_ const char *pv)
2711 PUSHSTACKi(PERLSI_REQUIRE);
2713 sv = sv_newmortal();
2714 sv_setpv(sv, "require '");
2717 eval_sv(sv, G_DISCARD);
2723 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2727 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2728 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2732 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2734 /* This message really ought to be max 23 lines.
2735 * Removed -h because the user already knows that option. Others? */
2737 static const char * const usage_msg[] = {
2738 "-0[octal] specify record separator (\\0, if no argument)",
2739 "-A[mod][=pattern] activate all/given assertions",
2740 "-a autosplit mode with -n or -p (splits $_ into @F)",
2741 "-C[number/list] enables the listed Unicode features",
2742 "-c check syntax only (runs BEGIN and CHECK blocks)",
2743 "-d[:debugger] run program under debugger",
2744 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2745 "-e program one line of program (several -e's allowed, omit programfile)",
2746 "-f don't do $sitelib/sitecustomize.pl at startup",
2747 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2748 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2749 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2750 "-l[octal] enable line ending processing, specifies line terminator",
2751 "-[mM][-]module execute \"use/no module...\" before executing program",
2752 "-n assume \"while (<>) { ... }\" loop around program",
2753 "-p assume loop like -n but print line also, like sed",
2754 "-P run program through C preprocessor before compilation",
2755 "-s enable rudimentary parsing for switches after programfile",
2756 "-S look for programfile using PATH environment variable",
2757 "-t enable tainting warnings",
2758 "-T enable tainting checks",
2759 "-u dump core after parsing program",
2760 "-U allow unsafe operations",
2761 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2762 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2763 "-w enable many useful warnings (RECOMMENDED)",
2764 "-W enable all warnings",
2765 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2766 "-X disable all warnings",
2770 const char * const *p = usage_msg;
2772 PerlIO_printf(PerlIO_stdout(),
2773 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2776 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2779 /* convert a string of -D options (or digits) into an int.
2780 * sets *s to point to the char after the options */
2784 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2786 static const char * const usage_msgd[] = {
2787 " Debugging flag values: (see also -d)",
2788 " p Tokenizing and parsing (with v, displays parse stack)",
2789 " s Stack snapshots (with v, displays all stacks)",
2790 " l Context (loop) stack processing",
2791 " t Trace execution",
2792 " o Method and overloading resolution",
2793 " c String/numeric conversions",
2794 " P Print profiling info, preprocessor command for -P, source file input state",
2795 " m Memory allocation",
2796 " f Format processing",
2797 " r Regular expression parsing and execution",
2798 " x Syntax tree dump",
2799 " u Tainting checks",
2800 " H Hash dump -- usurps values()",
2801 " X Scratchpad allocation",
2803 " S Thread synchronization",
2805 " R Include reference counts of dumped variables (eg when using -Ds)",
2806 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2807 " v Verbose: use in conjunction with other flags",
2809 " A Consistency checks on internal structures",
2810 " q quiet - currently only suppresses the 'EXECUTING' message",
2815 /* if adding extra options, remember to update DEBUG_MASK */
2816 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2818 for (; isALNUM(**s); (*s)++) {
2819 const char *d = strchr(debopts,**s);
2821 i |= 1 << (d - debopts);
2822 else if (ckWARN_d(WARN_DEBUGGING))
2823 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2824 "invalid option -D%c, use -D'' to see choices\n", **s);
2827 else if (isDIGIT(**s)) {
2829 for (; isALNUM(**s); (*s)++) ;
2831 else if (givehelp) {
2832 char **p = (char **)usage_msgd;
2833 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2836 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2837 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2838 "-Dp not implemented on this platform\n");
2844 /* This routine handles any switches that can be given during run */
2847 Perl_moreswitches(pTHX_ char *s)
2858 SvREFCNT_dec(PL_rs);
2859 if (s[1] == 'x' && s[2]) {
2860 const char *e = s+=2;
2866 flags = PERL_SCAN_SILENT_ILLDIGIT;
2867 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2868 if (s + numlen < e) {
2869 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2873 PL_rs = newSVpvn("", 0);
2874 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2875 tmps = (U8*)SvPVX(PL_rs);
2876 uvchr_to_utf8(tmps, rschar);
2877 SvCUR_set(PL_rs, UNISKIP(rschar));
2882 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2883 if (rschar & ~((U8)~0))
2884 PL_rs = &PL_sv_undef;
2885 else if (!rschar && numlen >= 2)
2886 PL_rs = newSVpvn("", 0);
2888 char ch = (char)rschar;
2889 PL_rs = newSVpvn(&ch, 1);
2892 sv_setsv(get_sv("/", TRUE), PL_rs);
2897 PL_unicode = parse_unicode_opts( (const char **)&s );
2902 while (*s && !isSPACE(*s)) ++s;
2904 PL_splitstr = savepv(PL_splitstr);
2918 /* -dt indicates to the debugger that threads will be used */
2919 if (*s == 't' && !isALNUM(s[1])) {
2921 my_setenv("PERL5DB_THREADED", "1");
2924 /* The following permits -d:Mod to accepts arguments following an =
2925 in the fashion that -MSome::Mod does. */
2926 if (*s == ':' || *s == '=') {
2929 sv = newSVpv("use Devel::", 0);
2931 /* We now allow -d:Module=Foo,Bar */
2932 while(isALNUM(*s) || *s==':') ++s;
2934 sv_catpv(sv, start);
2936 sv_catpvn(sv, start, s-start);
2937 sv_catpv(sv, " split(/,/,q{");
2942 my_setenv("PERL5DB", SvPV(sv, PL_na));
2945 PL_perldb = PERLDB_ALL;
2954 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
2955 #else /* !DEBUGGING */
2956 if (ckWARN_d(WARN_DEBUGGING))
2957 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2958 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
2959 for (s++; isALNUM(*s); s++) ;
2964 usage(PL_origargv[0]);
2968 Safefree(PL_inplace);
2969 #if defined(__CYGWIN__) /* do backup extension automagically */
2970 if (*(s+1) == '\0') {
2971 PL_inplace = savepv(".bak");
2974 #endif /* __CYGWIN__ */
2975 PL_inplace = savepv(s+1);
2976 for (s = PL_inplace; *s && !isSPACE(*s); s++)
2980 if (*s == '-') /* Additional switches on #! line. */
2984 case 'I': /* -I handled both here and in parse_body() */
2987 while (*s && isSPACE(*s))
2992 /* ignore trailing spaces (possibly followed by other switches) */
2994 for (e = p; *e && !isSPACE(*e); e++) ;
2998 } while (*p && *p != '-');
2999 e = savepvn(s, e-s);
3000 incpush(e, TRUE, TRUE, FALSE, FALSE);
3007 Perl_croak(aTHX_ "No directory specified for -I");
3013 SvREFCNT_dec(PL_ors_sv);
3019 PL_ors_sv = newSVpvn("\n",1);
3020 numlen = 3 + (*s == '0');
3021 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3025 if (RsPARA(PL_rs)) {
3026 PL_ors_sv = newSVpvn("\n\n",2);
3029 PL_ors_sv = newSVsv(PL_rs);
3036 PL_preambleav = newAV();
3040 SV *sv = newSVpv("use assertions::activate", 24);
3041 while(isALNUM(*s) || *s == ':') ++s;
3043 sv_catpvn(sv, "::", 2);
3044 sv_catpvn(sv, start, s-start);
3047 sv_catpvn(sv, " split(/,/,q\0", 13);
3049 sv_catpvn(sv, "\0)", 2);
3052 else if (*s != '\0') {
3053 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3055 av_push(PL_preambleav, sv);
3059 forbid_setid("-M"); /* XXX ? */
3062 forbid_setid("-m"); /* XXX ? */
3066 const char *use = "use ";
3067 /* -M-foo == 'no foo' */
3068 if (*s == '-') { use = "no "; ++s; }
3069 sv = newSVpv(use,0);
3071 /* We allow -M'Module qw(Foo Bar)' */
3072 while(isALNUM(*s) || *s==':') ++s;
3074 sv_catpv(sv, start);
3075 if (*(start-1) == 'm') {
3077 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3078 sv_catpv( sv, " ()");
3082 Perl_croak(aTHX_ "Module name required with -%c option",
3084 sv_catpvn(sv, start, s-start);
3085 sv_catpv(sv, " split(/,/,q");
3086 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3088 sv_catpvn(sv, "\0)", 2);
3092 PL_preambleav = newAV();
3093 av_push(PL_preambleav, sv);
3096 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3108 PL_doswitches = TRUE;
3122 #ifdef MACOS_TRADITIONAL
3123 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3125 PL_do_undump = TRUE;
3133 if (!sv_derived_from(PL_patchlevel, "version"))
3134 (void *)upg_version(PL_patchlevel);
3136 PerlIO_printf(PerlIO_stdout(),
3137 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3138 vstringify(PL_patchlevel),
3141 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3142 PerlIO_printf(PerlIO_stdout(),
3143 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3144 vstringify(PL_patchlevel)));
3145 PerlIO_printf(PerlIO_stdout(),
3146 Perl_form(aTHX_ " built under %s at %s %s\n",
3147 OSNAME, __DATE__, __TIME__));
3148 PerlIO_printf(PerlIO_stdout(),
3149 Perl_form(aTHX_ " OS Specific Release: %s\n",
3153 #if defined(LOCAL_PATCH_COUNT)
3154 if (LOCAL_PATCH_COUNT > 0)
3155 PerlIO_printf(PerlIO_stdout(),
3156 "\n(with %d registered patch%s, "
3157 "see perl -V for more detail)",
3158 (int)LOCAL_PATCH_COUNT,
3159 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3162 PerlIO_printf(PerlIO_stdout(),
3163 "\n\nCopyright 1987-2005, Larry Wall\n");
3164 #ifdef MACOS_TRADITIONAL
3165 PerlIO_printf(PerlIO_stdout(),
3166 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3167 "maintained by Chris Nandor\n");
3170 PerlIO_printf(PerlIO_stdout(),
3171 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3174 PerlIO_printf(PerlIO_stdout(),
3175 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3176 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3179 PerlIO_printf(PerlIO_stdout(),
3180 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3181 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3184 PerlIO_printf(PerlIO_stdout(),
3185 "atariST series port, ++jrb bammi@cadence.com\n");
3188 PerlIO_printf(PerlIO_stdout(),
3189 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3192 PerlIO_printf(PerlIO_stdout(),
3193 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3196 PerlIO_printf(PerlIO_stdout(),
3197 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3200 PerlIO_printf(PerlIO_stdout(),
3201 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3204 PerlIO_printf(PerlIO_stdout(),
3205 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3208 PerlIO_printf(PerlIO_stdout(),
3209 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3212 PerlIO_printf(PerlIO_stdout(),
3213 "MiNT port by Guido Flohr, 1997-1999\n");
3216 PerlIO_printf(PerlIO_stdout(),
3217 "EPOC port by Olaf Flebbe, 1999-2002\n");
3220 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3221 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3225 PerlIO_printf(PerlIO_stdout(),
3226 "Symbian port by Nokia, 2004-2005\n");
3228 #ifdef BINARY_BUILD_NOTICE
3229 BINARY_BUILD_NOTICE;
3231 PerlIO_printf(PerlIO_stdout(),
3233 Perl may be copied only under the terms of either the Artistic License or the\n\
3234 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3235 Complete documentation for Perl, including FAQ lists, should be found on\n\
3236 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3237 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3240 if (! (PL_dowarn & G_WARN_ALL_MASK))
3241 PL_dowarn |= G_WARN_ON;
3245 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3246 if (!specialWARN(PL_compiling.cop_warnings))
3247 SvREFCNT_dec(PL_compiling.cop_warnings);
3248 PL_compiling.cop_warnings = pWARN_ALL ;
3252 PL_dowarn = G_WARN_ALL_OFF;
3253 if (!specialWARN(PL_compiling.cop_warnings))
3254 SvREFCNT_dec(PL_compiling.cop_warnings);
3255 PL_compiling.cop_warnings = pWARN_NONE ;
3260 if (s[1] == '-') /* Additional switches on #! line. */
3265 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3271 #ifdef ALTERNATE_SHEBANG
3272 case 'S': /* OS/2 needs -S on "extproc" line. */
3280 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3285 /* compliments of Tom Christiansen */
3287 /* unexec() can be found in the Gnu emacs distribution */
3288 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3291 Perl_my_unexec(pTHX)
3299 prog = newSVpv(BIN_EXP, 0);
3300 sv_catpv(prog, "/perl");
3301 file = newSVpv(PL_origfilename, 0);
3302 sv_catpv(file, ".perldump");
3304 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3305 /* unexec prints msg to stderr in case of failure */
3306 PerlProc_exit(status);
3309 # include <lib$routines.h>
3310 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3312 ABORT(); /* for use with undump */
3317 /* initialize curinterp */
3323 # define PERLVAR(var,type)
3324 # define PERLVARA(var,n,type)
3325 # if defined(PERL_IMPLICIT_CONTEXT)
3326 # if defined(USE_5005THREADS)
3327 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3328 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3329 # else /* !USE_5005THREADS */
3330 # define PERLVARI(var,type,init) aTHX->var = init;
3331 # define PERLVARIC(var,type,init) aTHX->var = init;
3332 # endif /* USE_5005THREADS */
3334 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3335 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3337 # include "intrpvar.h"
3338 # ifndef USE_5005THREADS
3339 # include "thrdvar.h"
3346 # define PERLVAR(var,type)
3347 # define PERLVARA(var,n,type)
3348 # define PERLVARI(var,type,init) PL_##var = init;
3349 # define PERLVARIC(var,type,init) PL_##var = init;
3350 # include "intrpvar.h"
3351 # ifndef USE_5005THREADS
3352 # include "thrdvar.h"
3363 S_init_main_stash(pTHX)
3367 PL_curstash = PL_defstash = newHV();
3368 PL_curstname = newSVpvn("main",4);
3369 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3370 SvREFCNT_dec(GvHV(gv));
3371 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3373 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3374 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3375 GvMULTI_on(PL_incgv);
3376 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3377 GvMULTI_on(PL_hintgv);
3378 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3379 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3380 GvMULTI_on(PL_errgv);
3381 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3382 GvMULTI_on(PL_replgv);
3383 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3384 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3385 sv_setpvn(ERRSV, "", 0);
3386 PL_curstash = PL_defstash;
3387 CopSTASH_set(&PL_compiling, PL_defstash);
3388 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3389 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3390 /* We must init $/ before switches are processed. */
3391 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3394 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3396 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3401 const char *cpp_discard_flag;
3410 PL_origfilename = savepvn("-e", 2);
3413 /* if find_script() returns, it returns a malloc()-ed value */
3414 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3416 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3417 const char *s = scriptname + 8;
3418 PL_fdscript = atoi(s);
3423 * Tell apart "normal" usage of fdscript, e.g.
3424 * with bash on FreeBSD:
3425 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3426 * from usage in suidperl.
3427 * Does any "normal" usage leave garbage after the number???
3428 * Is it a mistake to use a similar /dev/fd/ construct for
3433 * Be supersafe and do some sanity-checks.
3434 * Still, can we be sure we got the right thing?
3437 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3440 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3442 scriptname = savepv(s + 1);
3443 Safefree(PL_origfilename);
3444 PL_origfilename = (char *)scriptname;
3449 CopFILE_free(PL_curcop);
3450 CopFILE_set(PL_curcop, PL_origfilename);
3451 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3452 scriptname = (char *)"";
3453 if (PL_fdscript >= 0) {
3454 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3455 # if defined(HAS_FCNTL) && defined(F_SETFD)
3457 /* ensure close-on-exec */
3458 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3463 Perl_croak(aTHX_ "sperl needs fd script\n"
3464 "You should not call sperl directly; do you need to "
3465 "change a #! line\nfrom sperl to perl?\n");
3468 * Do not open (or do other fancy stuff) while setuid.
3469 * Perl does the open, and hands script to suidperl on a fd;
3470 * suidperl only does some checks, sets up UIDs and re-execs
3471 * perl with that fd as it has always done.
3474 if (PL_suidscript != 1) {
3475 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3478 else if (PL_preprocess) {
3479 const char *cpp_cfg = CPPSTDIN;
3480 SV *cpp = newSVpvn("",0);
3481 SV *cmd = NEWSV(0,0);
3483 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3484 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3485 if (strEQ(cpp_cfg, "cppstdin"))
3486 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3487 sv_catpv(cpp, cpp_cfg);
3490 sv_catpvn(sv, "-I", 2);
3491 sv_catpv(sv,PRIVLIB_EXP);
3494 DEBUG_P(PerlIO_printf(Perl_debug_log,
3495 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3496 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3499 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3506 cpp_discard_flag = "";
3508 cpp_discard_flag = "-C";
3512 perl = os2_execname(aTHX);
3514 perl = PL_origargv[0];
3518 /* This strips off Perl comments which might interfere with
3519 the C pre-processor, including #!. #line directives are
3520 deliberately stripped to avoid confusion with Perl's version
3521 of #line. FWP played some golf with it so it will fit
3522 into VMS's 255 character buffer.
3525 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3527 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3529 Perl_sv_setpvf(aTHX_ cmd, "\
3530 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3531 perl, quote, code, quote, scriptname, cpp,
3532 cpp_discard_flag, sv, CPPMINUS);
3534 PL_doextract = FALSE;
3536 DEBUG_P(PerlIO_printf(Perl_debug_log,
3537 "PL_preprocess: cmd=\"%s\"\n",
3540 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3544 else if (!*scriptname) {
3545 forbid_setid("program input from stdin");
3546 PL_rsfp = PerlIO_stdin();
3549 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3550 # if defined(HAS_FCNTL) && defined(F_SETFD)
3552 /* ensure close-on-exec */
3553 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3556 #endif /* IAMSUID */
3558 /* PSz 16 Sep 03 Keep neat error message */
3559 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3560 CopFILE(PL_curcop), Strerror(errno));
3565 * I_SYSSTATVFS HAS_FSTATVFS
3567 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3568 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3569 * here so that metaconfig picks them up. */
3573 S_fd_on_nosuid_fs(pTHX_ int fd)
3576 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3577 * but is needed also on machines without setreuid.
3578 * Seems safe enough to run as root.
3580 int check_okay = 0; /* able to do all the required sys/libcalls */
3581 int on_nosuid = 0; /* the fd is on a nosuid fs */
3583 * Need to check noexec also: nosuid might not be set, the average
3584 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3586 int on_noexec = 0; /* the fd is on a noexec fs */
3589 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3590 * fstatvfs() is UNIX98.
3591 * fstatfs() is 4.3 BSD.
3592 * ustat()+getmnt() is pre-4.3 BSD.
3593 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3594 * an irrelevant filesystem while trying to reach the right one.
3597 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3599 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3600 defined(HAS_FSTATVFS)
3601 # define FD_ON_NOSUID_CHECK_OKAY
3602 struct statvfs stfs;
3604 check_okay = fstatvfs(fd, &stfs) == 0;
3605 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3607 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3608 on platforms where it is present. */
3609 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3611 # endif /* fstatvfs */
3613 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3614 defined(PERL_MOUNT_NOSUID) && \
3615 defined(PERL_MOUNT_NOEXEC) && \
3616 defined(HAS_FSTATFS) && \
3617 defined(HAS_STRUCT_STATFS) && \
3618 defined(HAS_STRUCT_STATFS_F_FLAGS)
3619 # define FD_ON_NOSUID_CHECK_OKAY
3622 check_okay = fstatfs(fd, &stfs) == 0;
3623 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3624 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3625 # endif /* fstatfs */
3627 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3628 defined(PERL_MOUNT_NOSUID) && \
3629 defined(PERL_MOUNT_NOEXEC) && \
3630 defined(HAS_FSTAT) && \
3631 defined(HAS_USTAT) && \
3632 defined(HAS_GETMNT) && \
3633 defined(HAS_STRUCT_FS_DATA) && \
3635 # define FD_ON_NOSUID_CHECK_OKAY
3638 if (fstat(fd, &fdst) == 0) {
3640 if (ustat(fdst.st_dev, &us) == 0) {
3642 /* NOSTAT_ONE here because we're not examining fields which
3643 * vary between that case and STAT_ONE. */
3644 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3645 size_t cmplen = sizeof(us.f_fname);
3646 if (sizeof(fsd.fd_req.path) < cmplen)
3647 cmplen = sizeof(fsd.fd_req.path);
3648 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3649 fdst.st_dev == fsd.fd_req.dev) {
3651 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3652 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3658 # endif /* fstat+ustat+getmnt */
3660 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3661 defined(HAS_GETMNTENT) && \
3662 defined(HAS_HASMNTOPT) && \
3663 defined(MNTOPT_NOSUID) && \
3664 defined(MNTOPT_NOEXEC)
3665 # define FD_ON_NOSUID_CHECK_OKAY
3666 FILE *mtab = fopen("/etc/mtab", "r");
3667 struct mntent *entry;
3670 if (mtab && (fstat(fd, &stb) == 0)) {
3671 while (entry = getmntent(mtab)) {
3672 if (stat(entry->mnt_dir, &fsb) == 0
3673 && fsb.st_dev == stb.st_dev)
3675 /* found the filesystem */
3677 if (hasmntopt(entry, MNTOPT_NOSUID))
3679 if (hasmntopt(entry, MNTOPT_NOEXEC))
3682 } /* A single fs may well fail its stat(). */
3687 # endif /* getmntent+hasmntopt */
3690 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3692 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3694 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3695 return ((!check_okay) || on_nosuid || on_noexec);
3697 #endif /* IAMSUID */
3700 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3705 #endif /* IAMSUID */
3707 /* do we need to emulate setuid on scripts? */
3709 /* This code is for those BSD systems that have setuid #! scripts disabled
3710 * in the kernel because of a security problem. Merely defining DOSUID
3711 * in perl will not fix that problem, but if you have disabled setuid
3712 * scripts in the kernel, this will attempt to emulate setuid and setgid
3713 * on scripts that have those now-otherwise-useless bits set. The setuid
3714 * root version must be called suidperl or sperlN.NNN. If regular perl
3715 * discovers that it has opened a setuid script, it calls suidperl with
3716 * the same argv that it had. If suidperl finds that the script it has
3717 * just opened is NOT setuid root, it sets the effective uid back to the
3718 * uid. We don't just make perl setuid root because that loses the
3719 * effective uid we had before invoking perl, if it was different from the
3722 * Description/comments above do not match current workings:
3723 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3724 * suidperl called with script open and name changed to /dev/fd/N/X;
3725 * suidperl croaks if script is not setuid;
3726 * making perl setuid would be a huge security risk (and yes, that
3727 * would lose any euid we might have had).
3729 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3730 * be defined in suidperl only. suidperl must be setuid root. The
3731 * Configure script will set this up for you if you want it.
3737 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3738 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3739 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3741 const char *linestr;
3744 if (PL_fdscript < 0 || PL_suidscript != 1)
3745 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3747 * Since the script is opened by perl, not suidperl, some of these
3748 * checks are superfluous. Leaving them in probably does not lower
3752 * Do checks even for systems with no HAS_SETREUID.
3753 * We used to swap, then re-swap UIDs with
3755 if (setreuid(PL_euid,PL_uid) < 0
3756 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3757 Perl_croak(aTHX_ "Can't swap uid and euid");
3760 if (setreuid(PL_uid,PL_euid) < 0
3761 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3762 Perl_croak(aTHX_ "Can't reswap uid and euid");
3766 /* On this access check to make sure the directories are readable,
3767 * there is actually a small window that the user could use to make
3768 * filename point to an accessible directory. So there is a faint
3769 * chance that someone could execute a setuid script down in a
3770 * non-accessible directory. I don't know what to do about that.
3771 * But I don't think it's too important. The manual lies when
3772 * it says access() is useful in setuid programs.
3774 * So, access() is pretty useless... but not harmful... do anyway.
3776 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3777 Perl_croak(aTHX_ "Can't access() script\n");
3780 /* If we can swap euid and uid, then we can determine access rights
3781 * with a simple stat of the file, and then compare device and
3782 * inode to make sure we did stat() on the same file we opened.
3783 * Then we just have to make sure he or she can execute it.
3786 * As the script is opened by perl, not suidperl, we do not need to
3787 * care much about access rights.
3789 * The 'script changed' check is needed, or we can get lied to
3790 * about $0 with e.g.
3791 * suidperl /dev/fd/4//bin/x 4<setuidscript
3792 * Without HAS_SETREUID, is it safe to stat() as root?
3794 * Are there any operating systems that pass /dev/fd/xxx for setuid
3795 * scripts, as suggested/described in perlsec(1)? Surely they do not
3796 * pass the script name as we do, so the "script changed" test would
3797 * fail for them... but we never get here with
3798 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3800 * This is one place where we must "lie" about return status: not
3801 * say if the stat() failed. We are doing this as root, and could
3802 * be tricked into reporting existence or not of files that the
3803 * "plain" user cannot even see.
3807 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3808 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3809 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3810 Perl_croak(aTHX_ "Setuid script changed\n");
3814 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3815 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3818 * We used to do this check as the "plain" user (after swapping
3819 * UIDs). But the check for nosuid and noexec filesystem is needed,
3820 * and should be done even without HAS_SETREUID. (Maybe those
3821 * operating systems do not have such mount options anyway...)
3822 * Seems safe enough to do as root.
3824 #if !defined(NO_NOSUID_CHECK)
3825 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3826 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3829 #endif /* IAMSUID */
3831 if (!S_ISREG(PL_statbuf.st_mode)) {
3832 Perl_croak(aTHX_ "Setuid script not plain file\n");
3834 if (PL_statbuf.st_mode & S_IWOTH)
3835 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3836 PL_doswitches = FALSE; /* -s is insecure in suid */
3837 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3838 CopLINE_inc(PL_curcop);
3839 linestr = SvPV_nolen_const(PL_linestr);
3840 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3841 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3842 Perl_croak(aTHX_ "No #! line");
3846 /* Sanity check on line length */
3847 if (strlen(s) < 1 || strlen(s) > 4000)
3848 Perl_croak(aTHX_ "Very long #! line");
3849 /* Allow more than a single space after #! */
3850 while (isSPACE(*s)) s++;
3851 /* Sanity check on buffer end */
3852 while ((*s) && !isSPACE(*s)) s++;
3853 for (s2 = s; (s2 > linestr &&
3854 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3855 || s2[-1] == '-')); s2--) ;
3856 /* Sanity check on buffer start */
3857 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3858 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3859 Perl_croak(aTHX_ "Not a perl script");
3860 while (*s == ' ' || *s == '\t') s++;
3862 * #! arg must be what we saw above. They can invoke it by
3863 * mentioning suidperl explicitly, but they may not add any strange
3864 * arguments beyond what #! says if they do invoke suidperl that way.
3867 * The way validarg was set up, we rely on the kernel to start
3868 * scripts with argv[1] set to contain all #! line switches (the
3872 * Check that we got all the arguments listed in the #! line (not
3873 * just that there are no extraneous arguments). Might not matter
3874 * much, as switches from #! line seem to be acted upon (also), and
3875 * so may be checked and trapped in perl. But, security checks must
3876 * be done in suidperl and not deferred to perl. Note that suidperl
3877 * does not get around to parsing (and checking) the switches on
3878 * the #! line (but execs perl sooner).
3879 * Allow (require) a trailing newline (which may be of two
3880 * characters on some architectures?) (but no other trailing
3883 len = strlen(validarg);
3884 if (strEQ(validarg," PHOOEY ") ||
3885 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3886 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3887 Perl_croak(aTHX_ "Args must match #! line");
3890 if (PL_fdscript < 0 &&
3891 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3892 PL_euid == PL_statbuf.st_uid)
3894 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3895 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3896 #endif /* IAMSUID */
3898 if (PL_fdscript < 0 &&
3899 PL_euid) { /* oops, we're not the setuid root perl */
3901 * When root runs a setuid script, we do not go through the same
3902 * steps of execing sperl and then perl with fd scripts, but
3903 * simply set up UIDs within the same perl invocation; so do
3904 * not have the same checks (on options, whatever) that we have
3905 * for plain users. No problem really: would have to be a script
3906 * that does not actually work for plain users; and if root is
3907 * foolish and can be persuaded to run such an unsafe script, he
3908 * might run also non-setuid ones, and deserves what he gets.
3910 * Or, we might drop the PL_euid check above (and rely just on
3911 * PL_fdscript to avoid loops), and do the execs
3917 * Pass fd script to suidperl.
3918 * Exec suidperl, substituting fd script for scriptname.
3919 * Pass script name as "subdir" of fd, which perl will grok;
3920 * in fact will use that to distinguish this from "normal"
3921 * usage, see comments above.
3923 PerlIO_rewind(PL_rsfp);
3924 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3925 /* PSz 27 Feb 04 Sanity checks on scriptname */
3926 if ((!scriptname) || (!*scriptname) ) {
3927 Perl_croak(aTHX_ "No setuid script name\n");
3929 if (*scriptname == '-') {
3930 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3931 /* Or we might confuse it with an option when replacing
3932 * name in argument list, below (though we do pointer, not
3933 * string, comparisons).
3936 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3937 if (!PL_origargv[which]) {
3938 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3940 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3941 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3942 #if defined(HAS_FCNTL) && defined(F_SETFD)
3943 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3946 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3947 (int)PERL_REVISION, (int)PERL_VERSION,
3948 (int)PERL_SUBVERSION), PL_origargv);
3950 #endif /* IAMSUID */
3951 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
3954 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3956 * This seems back to front: we try HAS_SETEGID first; if not available
3957 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3958 * in the sense that we only want to set EGID; but are there any machines
3959 * with either of the latter, but not the former? Same with UID, later.
3962 (void)setegid(PL_statbuf.st_gid);
3965 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3967 #ifdef HAS_SETRESGID
3968 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3970 PerlProc_setgid(PL_statbuf.st_gid);
3974 if (PerlProc_getegid() != PL_statbuf.st_gid)
3975 Perl_croak(aTHX_ "Can't do setegid!\n");
3977 if (PL_statbuf.st_mode & S_ISUID) {
3978 if (PL_statbuf.st_uid != PL_euid)
3980 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3983 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3985 #ifdef HAS_SETRESUID
3986 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3988 PerlProc_setuid(PL_statbuf.st_uid);
3992 if (PerlProc_geteuid() != PL_statbuf.st_uid)
3993 Perl_croak(aTHX_ "Can't do seteuid!\n");
3995 else if (PL_uid) { /* oops, mustn't run as root */
3997 (void)seteuid((Uid_t)PL_uid);
4000 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4002 #ifdef HAS_SETRESUID
4003 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4005 PerlProc_setuid((Uid_t)PL_uid);
4009 if (PerlProc_geteuid() != PL_uid)
4010 Perl_croak(aTHX_ "Can't do seteuid!\n");
4013 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4014 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4017 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4018 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4019 else if (PL_fdscript < 0 || PL_suidscript != 1)
4020 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4021 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4023 /* PSz 16 Sep 03 Keep neat error message */
4024 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4027 /* We absolutely must clear out any saved ids here, so we */
4028 /* exec the real perl, substituting fd script for scriptname. */
4029 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4031 * It might be thought that using setresgid and/or setresuid (changed to
4032 * set the saved IDs) above might obviate the need to exec, and we could
4033 * go on to "do the perl thing".
4035 * Is there such a thing as "saved GID", and is that set for setuid (but
4036 * not setgid) execution like suidperl? Without exec, it would not be
4037 * cleared for setuid (but not setgid) scripts (or might need a dummy
4040 * We need suidperl to do the exact same argument checking that perl
4041 * does. Thus it cannot be very small; while it could be significantly
4042 * smaller, it is safer (simpler?) to make it essentially the same
4043 * binary as perl (but they are not identical). - Maybe could defer that
4044 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4045 * but prefer to do thorough checks in suidperl itself. Such deferral
4046 * would make suidperl security rely on perl, a design no-no.
4048 * Setuid things should be short and simple, thus easy to understand and
4049 * verify. They should do their "own thing", without influence by
4050 * attackers. It may help if their internal execution flow is fixed,
4051 * regardless of platform: it may be best to exec anyway.
4053 * Suidperl should at least be conceptually simple: a wrapper only,
4054 * never to do any real perl. Maybe we should put
4056 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4058 * into the perly bits.
4060 PerlIO_rewind(PL_rsfp);
4061 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4063 * Keep original arguments: suidperl already has fd script.
4065 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4066 /* if (!PL_origargv[which]) { */
4067 /* errno = EPERM; */
4068 /* Perl_croak(aTHX_ "Permission denied\n"); */
4070 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4071 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4072 #if defined(HAS_FCNTL) && defined(F_SETFD)
4073 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4076 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4077 (int)PERL_REVISION, (int)PERL_VERSION,
4078 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4080 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4081 #endif /* IAMSUID */
4083 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4084 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4085 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4086 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4088 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4091 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4092 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4093 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4094 /* not set-id, must be wrapped */
4102 S_find_beginning(pTHX)
4105 register const char *s2;
4106 #ifdef MACOS_TRADITIONAL
4110 /* skip forward in input to the real script? */
4113 #ifdef MACOS_TRADITIONAL
4114 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4116 while (PL_doextract || gMacPerl_AlwaysExtract) {
4117 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4118 if (!gMacPerl_AlwaysExtract)
4119 Perl_croak(aTHX_ "No Perl script found in input\n");
4121 if (PL_doextract) /* require explicit override ? */
4122 if (!OverrideExtract(PL_origfilename))
4123 Perl_croak(aTHX_ "User aborted script\n");
4125 PL_doextract = FALSE;
4127 /* Pater peccavi, file does not have #! */
4128 PerlIO_rewind(PL_rsfp);
4133 while (PL_doextract) {
4134 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4135 Perl_croak(aTHX_ "No Perl script found in input\n");
4138 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4139 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4140 PL_doextract = FALSE;
4141 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4143 while (*s == ' ' || *s == '\t') s++;
4145 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4146 || s2[-1] == '_') s2--;
4147 if (strnEQ(s2-4,"perl",4))
4148 while ((s = moreswitches(s)))
4151 #ifdef MACOS_TRADITIONAL
4152 /* We are always searching for the #!perl line in MacPerl,
4153 * so if we find it, still keep the line count correct
4154 * by counting lines we already skipped over
4156 for (; maclines > 0 ; maclines--)
4157 PerlIO_ungetc(PL_rsfp, '\n');
4161 /* gMacPerl_AlwaysExtract is false in MPW tool */
4162 } else if (gMacPerl_AlwaysExtract) {
4173 PL_uid = PerlProc_getuid();
4174 PL_euid = PerlProc_geteuid();
4175 PL_gid = PerlProc_getgid();
4176 PL_egid = PerlProc_getegid();
4178 PL_uid |= PL_gid << 16;
4179 PL_euid |= PL_egid << 16;
4181 /* Should not happen: */
4182 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4183 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4186 * Should go by suidscript, not uid!=euid: why disallow
4187 * system("ls") in scripts run from setuid things?
4188 * Or, is this run before we check arguments and set suidscript?
4189 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4190 * (We never have suidscript, can we be sure to have fdscript?)
4191 * Or must then go by UID checks? See comments in forbid_setid also.
4195 /* This is used very early in the lifetime of the program,
4196 * before even the options are parsed, so PL_tainting has
4197 * not been initialized properly. */
4199 Perl_doing_taint(int argc, char *argv[], char *envp[])
4201 #ifndef PERL_IMPLICIT_SYS
4202 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4203 * before we have an interpreter-- and the whole point of this
4204 * function is to be called at such an early stage. If you are on
4205 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4206 * "tainted because running with altered effective ids', you'll
4207 * have to add your own checks somewhere in here. The two most
4208 * known samples of 'implicitness' are Win32 and NetWare, neither
4209 * of which has much of concept of 'uids'. */
4210 int uid = PerlProc_getuid();
4211 int euid = PerlProc_geteuid();
4212 int gid = PerlProc_getgid();
4213 int egid = PerlProc_getegid();
4220 if (uid && (euid != uid || egid != gid))
4222 #endif /* !PERL_IMPLICIT_SYS */
4223 /* This is a really primitive check; environment gets ignored only
4224 * if -T are the first chars together; otherwise one gets
4225 * "Too late" message. */
4226 if ( argc > 1 && argv[1][0] == '-'
4227 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4233 S_forbid_setid(pTHX_ const char *s)
4235 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4236 if (PL_euid != PL_uid)
4237 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4238 if (PL_egid != PL_gid)
4239 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4240 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4242 * Checks for UID/GID above "wrong": why disallow
4243 * perl -e 'print "Hello\n"'
4244 * from within setuid things?? Simply drop them: replaced by
4245 * fdscript/suidscript and #ifdef IAMSUID checks below.
4247 * This may be too late for command-line switches. Will catch those on
4248 * the #! line, after finding the script name and setting up
4249 * fdscript/suidscript. Note that suidperl does not get around to
4250 * parsing (and checking) the switches on the #! line, but checks that
4251 * the two sets are identical.
4253 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4254 * instead, or would that be "too late"? (We never have suidscript, can
4255 * we be sure to have fdscript?)
4257 * Catch things with suidscript (in descendant of suidperl), even with
4258 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4259 * below; but I am paranoid.
4261 * Also see comments about root running a setuid script, elsewhere.
4263 if (PL_suidscript >= 0)
4264 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4266 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4267 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4268 #endif /* IAMSUID */
4272 Perl_init_debugger(pTHX)
4274 HV *ostash = PL_curstash;
4276 PL_curstash = PL_debstash;
4277 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4278 AvREAL_off(PL_dbargs);
4279 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4280 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4281 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4282 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4283 sv_setiv(PL_DBsingle, 0);
4284 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4285 sv_setiv(PL_DBtrace, 0);
4286 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4287 sv_setiv(PL_DBsignal, 0);
4288 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4289 sv_setiv(PL_DBassertion, 0);
4290 PL_curstash = ostash;
4293 #ifndef STRESS_REALLOC
4294 #define REASONABLE(size) (size)
4296 #define REASONABLE(size) (1) /* unreasonable */
4300 Perl_init_stacks(pTHX)
4302 /* start with 128-item stack and 8K cxstack */
4303 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4304 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4305 PL_curstackinfo->si_type = PERLSI_MAIN;
4306 PL_curstack = PL_curstackinfo->si_stack;
4307 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4309 PL_stack_base = AvARRAY(PL_curstack);
4310 PL_stack_sp = PL_stack_base;
4311 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4313 New(50,PL_tmps_stack,REASONABLE(128),SV*);
4316 PL_tmps_max = REASONABLE(128);
4318 New(54,PL_markstack,REASONABLE(32),I32);
4319 PL_markstack_ptr = PL_markstack;
4320 PL_markstack_max = PL_markstack + REASONABLE(32);
4324 New(54,PL_scopestack,REASONABLE(32),I32);
4325 PL_scopestack_ix = 0;
4326 PL_scopestack_max = REASONABLE(32);
4328 New(54,PL_savestack,REASONABLE(128),ANY);
4329 PL_savestack_ix = 0;
4330 PL_savestack_max = REASONABLE(128);
4338 while (PL_curstackinfo->si_next)
4339 PL_curstackinfo = PL_curstackinfo->si_next;
4340 while (PL_curstackinfo) {
4341 PERL_SI *p = PL_curstackinfo->si_prev;
4342 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4343 Safefree(PL_curstackinfo->si_cxstack);
4344 Safefree(PL_curstackinfo);
4345 PL_curstackinfo = p;
4347 Safefree(PL_tmps_stack);
4348 Safefree(PL_markstack);
4349 Safefree(PL_scopestack);
4350 Safefree(PL_savestack);
4359 lex_start(PL_linestr);
4361 PL_subname = newSVpvn("main",4);
4365 S_init_predump_symbols(pTHX)
4370 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4371 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4372 GvMULTI_on(PL_stdingv);
4373 io = GvIOp(PL_stdingv);
4374 IoTYPE(io) = IoTYPE_RDONLY;
4375 IoIFP(io) = PerlIO_stdin();
4376 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4378 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4380 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4383 IoTYPE(io) = IoTYPE_WRONLY;
4384 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4386 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4388 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4390 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4391 GvMULTI_on(PL_stderrgv);
4392 io = GvIOp(PL_stderrgv);
4393 IoTYPE(io) = IoTYPE_WRONLY;
4394 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4395 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4397 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4399 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4402 Safefree(PL_osname);
4403 PL_osname = savepv(OSNAME);
4407 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4410 argc--,argv++; /* skip name of script */
4411 if (PL_doswitches) {
4412 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4415 if (argv[0][1] == '-' && !argv[0][2]) {
4419 if ((s = strchr(argv[0], '='))) {
4421 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4424 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4427 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4428 GvMULTI_on(PL_argvgv);
4429 (void)gv_AVadd(PL_argvgv);
4430 av_clear(GvAVn(PL_argvgv));
4431 for (; argc > 0; argc--,argv++) {
4432 SV *sv = newSVpv(argv[0],0);
4433 av_push(GvAVn(PL_argvgv),sv);
4434 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4435 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4438 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4439 (void)sv_utf8_decode(sv);
4445 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4450 PL_toptarget = NEWSV(0,0);
4451 sv_upgrade(PL_toptarget, SVt_PVFM);
4452 sv_setpvn(PL_toptarget, "", 0);
4453 PL_bodytarget = NEWSV(0,0);
4454 sv_upgrade(PL_bodytarget, SVt_PVFM);
4455 sv_setpvn(PL_bodytarget, "", 0);
4456 PL_formtarget = PL_bodytarget;
4460 init_argv_symbols(argc,argv);
4462 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4463 #ifdef MACOS_TRADITIONAL
4464 /* $0 is not majick on a Mac */
4465 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4467 sv_setpv(GvSV(tmpgv),PL_origfilename);
4468 magicname("0", "0", 1);
4471 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4473 GvMULTI_on(PL_envgv);
4474 hv = GvHVn(PL_envgv);
4475 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4477 #ifdef USE_ENVIRON_ARRAY
4478 /* Note that if the supplied env parameter is actually a copy
4479 of the global environ then it may now point to free'd memory
4480 if the environment has been modified since. To avoid this
4481 problem we treat env==NULL as meaning 'use the default'
4486 # ifdef USE_ITHREADS
4487 && PL_curinterp == aTHX
4491 environ[0] = Nullch;
4494 char** origenv = environ;
4497 for (; *env; env++) {
4498 if (!(s = strchr(*env,'=')) || s == *env)
4500 #if defined(MSDOS) && !defined(DJGPP)
4505 sv = newSVpv(s+1, 0);
4506 (void)hv_store(hv, *env, s - *env, sv, 0);
4509 if (origenv != environ) {
4510 /* realloc has shifted us */
4511 env = (env - origenv) + environ;
4516 #endif /* USE_ENVIRON_ARRAY */
4517 #endif /* !PERL_MICRO */
4520 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4521 SvREADONLY_off(GvSV(tmpgv));
4522 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4523 SvREADONLY_on(GvSV(tmpgv));
4525 #ifdef THREADS_HAVE_PIDS
4526 PL_ppid = (IV)getppid();
4529 /* touch @F array to prevent spurious warnings 20020415 MJD */
4531 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4533 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4534 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4535 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4539 S_init_perllib(pTHX)
4544 s = PerlEnv_getenv("PERL5LIB");
4546 incpush(s, TRUE, TRUE, TRUE, FALSE);
4548 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4550 /* Treat PERL5?LIB as a possible search list logical name -- the
4551 * "natural" VMS idiom for a Unix path string. We allow each
4552 * element to be a set of |-separated directories for compatibility.
4556 if (my_trnlnm("PERL5LIB",buf,0))
4557 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4559 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4563 /* Use the ~-expanded versions of APPLLIB (undocumented),
4564 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4567 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4571 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4573 #ifdef MACOS_TRADITIONAL
4576 SV * privdir = NEWSV(55, 0);
4577 char * macperl = PerlEnv_getenv("MACPERL");
4582 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4583 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4584 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4585 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4586 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4587 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4589 SvREFCNT_dec(privdir);
4592 incpush(":", FALSE, FALSE, TRUE, FALSE);
4595 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4598 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4600 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4604 /* sitearch is always relative to sitelib on Windows for
4605 * DLL-based path intuition to work correctly */
4606 # if !defined(WIN32)
4607 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4613 /* this picks up sitearch as well */
4614 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4616 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4620 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4621 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4624 #ifdef PERL_VENDORARCH_EXP
4625 /* vendorarch is always relative to vendorlib on Windows for
4626 * DLL-based path intuition to work correctly */
4627 # if !defined(WIN32)
4628 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4632 #ifdef PERL_VENDORLIB_EXP
4634 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4636 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4640 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4641 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4644 #ifdef PERL_OTHERLIBDIRS
4645 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4649 incpush(".", FALSE, FALSE, TRUE, FALSE);
4650 #endif /* MACOS_TRADITIONAL */
4653 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4654 # define PERLLIB_SEP ';'
4657 # define PERLLIB_SEP '|'
4659 # if defined(MACOS_TRADITIONAL)
4660 # define PERLLIB_SEP ','
4662 # define PERLLIB_SEP ':'
4666 #ifndef PERLLIB_MANGLE
4667 # define PERLLIB_MANGLE(s,n) (s)
4670 /* Push a directory onto @INC if it exists.
4671 Generate a new SV if we do this, to save needing to copy the SV we push
4674 S_incpush_if_exists(pTHX_ SV *dir)
4677 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4678 S_ISDIR(tmpstatbuf.st_mode)) {
4679 av_push(GvAVn(PL_incgv), dir);
4686 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4689 SV *subdir = Nullsv;
4690 const char *p = dir;
4695 if (addsubdirs || addoldvers) {
4696 subdir = NEWSV(0,0);
4699 /* Break at all separators */
4701 SV *libdir = NEWSV(55,0);
4704 /* skip any consecutive separators */
4706 while ( *p == PERLLIB_SEP ) {
4707 /* Uncomment the next line for PATH semantics */
4708 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4713 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4714 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4719 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4720 p = Nullch; /* break out */
4722 #ifdef MACOS_TRADITIONAL
4723 if (!strchr(SvPVX(libdir), ':')) {
4726 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4728 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4729 sv_catpv(libdir, ":");
4732 /* Do the if() outside the #ifdef to avoid warnings about an unused
4735 #ifdef PERL_RELOCATABLE_INC
4737 * Relocatable include entries are marked with a leading .../
4740 * 0: Remove that leading ".../"
4741 * 1: Remove trailing executable name (anything after the last '/')
4742 * from the perl path to give a perl prefix
4744 * While the @INC element starts "../" and the prefix ends with a real
4745 * directory (ie not . or ..) chop that real directory off the prefix
4746 * and the leading "../" from the @INC element. ie a logical "../"
4748 * Finally concatenate the prefix and the remainder of the @INC element
4749 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4750 * generates /usr/local/lib/perl5
4752 char *libpath = SvPVX(libdir);
4753 STRLEN libpath_len = SvCUR(libdir);
4754 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4756 SV *caret_X = get_sv("\030", 0);
4757 /* Going to use the SV just as a scratch buffer holding a C
4763 /* $^X is *the* source of taint if tainting is on, hence
4764 SvPOK() won't be true. */
4766 assert(SvPOKp(caret_X));
4767 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4768 /* Firstly take off the leading .../
4769 If all else fail we'll do the paths relative to the current
4771 sv_chop(libdir, libpath + 4);
4772 /* Don't use SvPV as we're intentionally bypassing taining,
4773 mortal copies that the mg_get of tainting creates, and
4774 corruption that seems to come via the save stack.
4775 I guess that the save stack isn't correctly set up yet. */
4776 libpath = SvPVX(libdir);
4777 libpath_len = SvCUR(libdir);
4779 /* This would work more efficiently with memrchr, but as it's
4780 only a GNU extension we'd need to probe for it and
4781 implement our own. Not hard, but maybe not worth it? */
4783 prefix = SvPVX(prefix_sv);
4784 lastslash = strrchr(prefix, '/');
4786 /* First time in with the *lastslash = '\0' we just wipe off
4787 the trailing /perl from (say) /usr/foo/bin/perl
4791 while ((*lastslash = '\0'), /* Do that, come what may. */
4792 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4793 && (lastslash = strrchr(prefix, '/')))) {
4794 if (lastslash[1] == '\0'
4795 || (lastslash[1] == '.'
4796 && (lastslash[2] == '/' /* ends "/." */
4797 || (lastslash[2] == '/'
4798 && lastslash[3] == '/' /* or "/.." */
4800 /* Prefix ends "/" or "/." or "/..", any of which
4801 are fishy, so don't do any more logical cleanup.
4805 /* Remove leading "../" from path */
4808 /* Next iteration round the loop removes the last
4809 directory name from prefix by writing a '\0' in
4810 the while clause. */
4812 /* prefix has been terminated with a '\0' to the correct
4813 length. libpath points somewhere into the libdir SV.
4814 We need to join the 2 with '/' and drop the result into
4816 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4817 SvREFCNT_dec(libdir);
4818 /* And this is the new libdir. */
4821 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4822 /* Need to taint reloccated paths if running set ID */
4823 SvTAINTED_on(libdir);
4826 SvREFCNT_dec(prefix_sv);
4831 * BEFORE pushing libdir onto @INC we may first push version- and
4832 * archname-specific sub-directories.
4834 if (addsubdirs || addoldvers) {
4835 #ifdef PERL_INC_VERSION_LIST
4836 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4837 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4838 const char **incver;
4844 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4846 while (unix[len-1] == '/') len--; /* Cosmetic */
4847 sv_usepvn(libdir,unix,len);
4850 PerlIO_printf(Perl_error_log,
4851 "Failed to unixify @INC element \"%s\"\n",
4855 #ifdef MACOS_TRADITIONAL
4856 #define PERL_AV_SUFFIX_FMT ""
4857 #define PERL_ARCH_FMT "%s:"
4858 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4860 #define PERL_AV_SUFFIX_FMT "/"
4861 #define PERL_ARCH_FMT "/%s"
4862 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4864 /* .../version/archname if -d .../version/archname */
4865 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4867 (int)PERL_REVISION, (int)PERL_VERSION,
4868 (int)PERL_SUBVERSION, ARCHNAME);
4869 subdir = S_incpush_if_exists(aTHX_ subdir);
4871 /* .../version if -d .../version */
4872 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4873 (int)PERL_REVISION, (int)PERL_VERSION,
4874 (int)PERL_SUBVERSION);
4875 subdir = S_incpush_if_exists(aTHX_ subdir);
4877 /* .../archname if -d .../archname */
4878 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4879 subdir = S_incpush_if_exists(aTHX_ subdir);
4883 #ifdef PERL_INC_VERSION_LIST
4885 for (incver = incverlist; *incver; incver++) {
4886 /* .../xxx if -d .../xxx */
4887 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4888 subdir = S_incpush_if_exists(aTHX_ subdir);
4894 /* finally push this lib directory on the end of @INC */
4895 av_push(GvAVn(PL_incgv), libdir);
4898 assert (SvREFCNT(subdir) == 1);
4899 SvREFCNT_dec(subdir);
4903 #ifdef USE_5005THREADS
4904 STATIC struct perl_thread *
4905 S_init_main_thread(pTHX)
4907 #if !defined(PERL_IMPLICIT_CONTEXT)
4908 struct perl_thread *thr;
4912 Newz(53, thr, 1, struct perl_thread);
4913 PL_curcop = &PL_compiling;
4914 thr->interp = PERL_GET_INTERP;
4915 thr->cvcache = newHV();
4916 thr->threadsv = newAV();
4917 /* thr->threadsvp is set when find_threadsv is called */
4918 thr->specific = newAV();
4919 thr->flags = THRf_R_JOINABLE;
4920 MUTEX_INIT(&thr->mutex);
4921 /* Handcraft thrsv similarly to mess_sv */
4922 New(53, PL_thrsv, 1, SV);
4923 Newz(53, xpv, 1, XPV);
4924 SvFLAGS(PL_thrsv) = SVt_PV;
4925 SvANY(PL_thrsv) = (void*)xpv;
4926 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4927 SvPV_set(PL_thrsvr, (char*)thr);
4928 SvCUR_set(PL_thrsv, sizeof(thr));
4929 SvLEN_set(PL_thrsv, sizeof(thr));
4930 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4931 thr->oursv = PL_thrsv;
4932 PL_chopset = " \n-";
4935 MUTEX_LOCK(&PL_threads_mutex);
4941 MUTEX_UNLOCK(&PL_threads_mutex);
4943 #ifdef HAVE_THREAD_INTERN
4944 Perl_init_thread_intern(thr);
4947 #ifdef SET_THREAD_SELF
4948 SET_THREAD_SELF(thr);
4950 thr->self = pthread_self();
4951 #endif /* SET_THREAD_SELF */
4955 * These must come after the thread self setting
4956 * because sv_setpvn does SvTAINT and the taint
4957 * fields thread selfness being set.
4959 PL_toptarget = NEWSV(0,0);
4960 sv_upgrade(PL_toptarget, SVt_PVFM);
4961 sv_setpvn(PL_toptarget, "", 0);
4962 PL_bodytarget = NEWSV(0,0);
4963 sv_upgrade(PL_bodytarget, SVt_PVFM);
4964 sv_setpvn(PL_bodytarget, "", 0);
4965 PL_formtarget = PL_bodytarget;
4966 thr->errsv = newSVpvn("", 0);
4967 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
4970 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
4971 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
4972 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
4973 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
4974 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
4975 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
4977 PL_reginterp_cnt = 0;
4981 #endif /* USE_5005THREADS */
4984 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4988 const line_t oldline = CopLINE(PL_curcop);
4994 while (av_len(paramList) >= 0) {
4995 cv = (CV*)av_shift(paramList);
4997 if (paramList == PL_beginav) {
4998 /* save PL_beginav for compiler */
4999 if (! PL_beginav_save)
5000 PL_beginav_save = newAV();
5001 av_push(PL_beginav_save, (SV*)cv);
5003 else if (paramList == PL_checkav) {
5004 /* save PL_checkav for compiler */
5005 if (! PL_checkav_save)
5006 PL_checkav_save = newAV();
5007 av_push(PL_checkav_save, (SV*)cv);
5017 (void)SvPV_const(atsv, len);
5019 PL_curcop = &PL_compiling;
5020 CopLINE_set(PL_curcop, oldline);
5021 if (paramList == PL_beginav)
5022 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5024 Perl_sv_catpvf(aTHX_ atsv,
5025 "%s failed--call queue aborted",
5026 paramList == PL_checkav ? "CHECK"
5027 : paramList == PL_initav ? "INIT"
5029 while (PL_scopestack_ix > oldscope)
5032 Perl_croak(aTHX_ "%"SVf"", atsv);
5039 /* my_exit() was called */
5040 while (PL_scopestack_ix > oldscope)
5043 PL_curstash = PL_defstash;
5044 PL_curcop = &PL_compiling;
5045 CopLINE_set(PL_curcop, oldline);
5047 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5048 if (paramList == PL_beginav)
5049 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5051 Perl_croak(aTHX_ "%s failed--call queue aborted",
5052 paramList == PL_checkav ? "CHECK"
5053 : paramList == PL_initav ? "INIT"
5060 PL_curcop = &PL_compiling;
5061 CopLINE_set(PL_curcop, oldline);
5064 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5073 S_call_list_body(pTHX_ CV *cv)
5075 PUSHMARK(PL_stack_sp);
5076 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5081 Perl_my_exit(pTHX_ U32 status)
5083 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5084 thr, (unsigned long) status));
5093 STATUS_NATIVE_SET(status);
5100 Perl_my_failure_exit(pTHX)
5103 if (vaxc$errno & 1) {
5104 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5105 STATUS_NATIVE_SET(44);
5108 if (!vaxc$errno) /* unlikely */
5109 STATUS_NATIVE_SET(44);
5111 STATUS_NATIVE_SET(vaxc$errno);
5116 STATUS_UNIX_SET(errno);
5118 exitstatus = STATUS_UNIX >> 8;
5119 if (exitstatus & 255)
5120 STATUS_UNIX_SET(exitstatus);
5122 STATUS_UNIX_SET(255);
5129 S_my_exit_jump(pTHX)
5132 register PERL_CONTEXT *cx;
5137 SvREFCNT_dec(PL_e_script);
5138 PL_e_script = Nullsv;
5141 POPSTACK_TO(PL_mainstack);
5142 if (cxstack_ix >= 0) {
5145 POPBLOCK(cx,PL_curpm);
5150 PERL_UNUSED_VAR(gimme);
5151 PERL_UNUSED_VAR(newsp);
5155 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5157 const char * const p = SvPVX_const(PL_e_script);
5158 const char *nl = strchr(p, '\n');
5160 PERL_UNUSED_ARG(idx);
5161 PERL_UNUSED_ARG(maxlen);
5163 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5165 filter_del(read_e_script);
5168 sv_catpvn(buf_sv, p, nl-p);
5169 sv_chop(PL_e_script, nl);
5175 * c-indentation-style: bsd
5177 * indent-tabs-mode: t
5180 * ex: set ts=8 sts=4 sw=4 noet: