3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
175 PERL_SET_THX(my_perl);
179 #ifdef PERL_IMPLICIT_SYS
181 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
182 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
183 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
184 struct IPerlDir* ipD, struct IPerlSock* ipS,
185 struct IPerlProc* ipP)
187 PerlInterpreter *my_perl;
188 /* Newx() needs interpreter, so call malloc() instead */
189 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
190 S_init_tls_and_interp(my_perl);
191 Zero(my_perl, 1, PerlInterpreter);
201 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 =head1 Embedding Functions
210 =for apidoc perl_alloc
212 Allocates a new Perl interpreter. See L<perlembed>.
220 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 S_init_tls_and_interp(my_perl);
226 #ifndef PERL_TRACK_MEMPOOL
227 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
229 Zero(my_perl, 1, PerlInterpreter);
230 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
234 #endif /* PERL_IMPLICIT_SYS */
237 =for apidoc perl_construct
239 Initializes a new Perl interpreter. See L<perlembed>.
245 perl_construct(pTHXx)
251 PL_perl_destruct_level = 1;
253 if (PL_perl_destruct_level > 0)
256 /* Init the real globals (and main thread)? */
258 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
260 PL_linestr = newSV(79);
261 sv_upgrade(PL_linestr,SVt_PVIV);
263 if (!SvREADONLY(&PL_sv_undef)) {
264 /* set read-only and try to insure than we wont see REFCNT==0
267 SvREADONLY_on(&PL_sv_undef);
268 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
270 sv_setpv(&PL_sv_no,PL_No);
271 /* value lookup in void context - happens to have the side effect
272 of caching the numeric forms. */
275 SvREADONLY_on(&PL_sv_no);
276 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
278 sv_setpv(&PL_sv_yes,PL_Yes);
281 SvREADONLY_on(&PL_sv_yes);
282 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
284 SvREADONLY_on(&PL_sv_placeholder);
285 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
288 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
289 #ifdef PERL_USES_PL_PIDSTATUS
290 PL_pidstatus = newHV();
294 PL_rs = newSVpvs("\n");
299 PL_lex_state = LEX_NOTPARSING;
305 SET_NUMERIC_STANDARD();
307 #if defined(LOCAL_PATCH_COUNT)
308 PL_localpatches = local_patches; /* For possible -v */
311 #ifdef HAVE_INTERP_INTERN
315 PerlIO_init(aTHX); /* Hook to IO system */
317 PL_fdpid = newAV(); /* for remembering popen pids by fd */
318 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
319 PL_errors = newSVpvs("");
320 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
321 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
322 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
324 PL_regex_padav = newAV();
325 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
326 PL_regex_pad = AvARRAY(PL_regex_padav);
328 #ifdef USE_REENTRANT_API
329 Perl_reentrant_init(aTHX);
332 /* Note that strtab is a rather special HV. Assumptions are made
333 about not iterating on it, and not adding tie magic to it.
334 It is properly deallocated in perl_destruct() */
337 HvSHAREKEYS_off(PL_strtab); /* mandatory */
338 hv_ksplit(PL_strtab, 512);
340 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
341 _dyld_lookup_and_bind
342 ("__environ", (unsigned long *) &environ_pointer, NULL);
346 # ifdef USE_ENVIRON_ARRAY
347 PL_origenviron = environ;
351 /* Use sysconf(_SC_CLK_TCK) if available, if not
352 * available or if the sysconf() fails, use the HZ.
353 * BeOS has those, but returns the wrong value.
354 * The HZ if not originally defined has been by now
355 * been defined as CLK_TCK, if available. */
356 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
357 PL_clocktick = sysconf(_SC_CLK_TCK);
358 if (PL_clocktick <= 0)
362 PL_stashcache = newHV();
364 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
365 (int)PERL_VERSION, (int)PERL_SUBVERSION);
368 if (!PL_mmap_page_size) {
369 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
371 SETERRNO(0, SS_NORMAL);
373 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
375 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
377 if ((long) PL_mmap_page_size < 0) {
379 SV * const error = ERRSV;
380 SvUPGRADE(error, SVt_PV);
381 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
384 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
388 # ifdef HAS_GETPAGESIZE
389 PL_mmap_page_size = getpagesize();
391 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
392 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
396 if (PL_mmap_page_size <= 0)
397 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
398 (IV) PL_mmap_page_size);
400 #endif /* HAS_MMAP */
402 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
403 PL_timesbase.tms_utime = 0;
404 PL_timesbase.tms_stime = 0;
405 PL_timesbase.tms_cutime = 0;
406 PL_timesbase.tms_cstime = 0;
417 =for apidoc nothreadhook
419 Stub that provides thread hook for perl_destruct when there are
426 Perl_nothreadhook(pTHX)
432 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
434 Perl_dump_sv_child(pTHX_ SV *sv)
437 const int sock = PL_dumper_fd;
438 const int debug_fd = PerlIO_fileno(Perl_debug_log);
439 union control_un control;
442 struct cmsghdr *cmptr;
444 unsigned char buffer[256];
446 if(sock == -1 || debug_fd == -1)
449 PerlIO_flush(Perl_debug_log);
451 /* All these shenanigans are to pass a file descriptor over to our child for
452 it to dump out to. We can't let it hold open the file descriptor when it
453 forks, as the file descriptor it will dump to can turn out to be one end
454 of pipe that some other process will wait on for EOF. (So as it would
455 be open, the wait would be forever. */
457 msg.msg_control = control.control;
458 msg.msg_controllen = sizeof(control.control);
459 /* We're a connected socket so we don't need a destination */
465 cmptr = CMSG_FIRSTHDR(&msg);
466 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
467 cmptr->cmsg_level = SOL_SOCKET;
468 cmptr->cmsg_type = SCM_RIGHTS;
469 *((int *)CMSG_DATA(cmptr)) = 1;
471 vec[0].iov_base = (void*)&sv;
472 vec[0].iov_len = sizeof(sv);
473 got = sendmsg(sock, &msg, 0);
476 perror("Debug leaking scalars parent sendmsg failed");
479 if(got < sizeof(sv)) {
480 perror("Debug leaking scalars parent short sendmsg");
484 /* Return protocol is
486 unsigned char: length of location string (0 for empty)
487 unsigned char*: string (not terminated)
489 vec[0].iov_base = (void*)&returned_errno;
490 vec[0].iov_len = sizeof(returned_errno);
491 vec[1].iov_base = buffer;
494 got = readv(sock, vec, 2);
497 perror("Debug leaking scalars parent read failed");
498 PerlIO_flush(PerlIO_stderr());
501 if(got < sizeof(returned_errno) + 1) {
502 perror("Debug leaking scalars parent short read");
503 PerlIO_flush(PerlIO_stderr());
508 got = read(sock, buffer + 1, *buffer);
510 perror("Debug leaking scalars parent read 2 failed");
511 PerlIO_flush(PerlIO_stderr());
516 perror("Debug leaking scalars parent short read 2");
517 PerlIO_flush(PerlIO_stderr());
522 if (returned_errno || *buffer) {
523 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
524 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
525 returned_errno, strerror(returned_errno));
531 =for apidoc perl_destruct
533 Shuts down a Perl interpreter. See L<perlembed>.
542 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
544 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
550 /* wait for all pseudo-forked children to finish */
551 PERL_WAIT_FOR_CHILDREN;
553 destruct_level = PL_perl_destruct_level;
556 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
558 const int i = atoi(s);
559 if (destruct_level < i)
565 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
571 if (PL_endav && !PL_minus_c)
572 call_list(PL_scopestack_ix, PL_endav);
578 /* Need to flush since END blocks can produce output */
581 if (CALL_FPTR(PL_threadhook)(aTHX)) {
582 /* Threads hook has vetoed further cleanup */
586 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
587 if (destruct_level != 0) {
588 /* Fork here to create a child. Our child's job is to preserve the
589 state of scalars prior to destruction, so that we can instruct it
590 to dump any scalars that we later find have leaked.
591 There's no subtlety in this code - it assumes POSIX, and it doesn't
595 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
596 perror("Debug leaking scalars socketpair failed");
602 perror("Debug leaking scalars fork failed");
606 /* We are the child */
607 const int sock = fd[1];
608 const int debug_fd = PerlIO_fileno(Perl_debug_log);
611 /* Our success message is an integer 0, and a char 0 */
612 static const char success[sizeof(int) + 1];
616 /* We need to close all other file descriptors otherwise we end up
617 with interesting hangs, where the parent closes its end of a
618 pipe, and sits waiting for (another) child to terminate. Only
619 that child never terminates, because it never gets EOF, because
620 we also have the far end of the pipe open. We even need to
621 close the debugging fd, because sometimes it happens to be one
622 end of a pipe, and a process is waiting on the other end for
623 EOF. Normally it would be closed at some point earlier in
624 destruction, but if we happen to cause the pipe to remain open,
625 EOF never occurs, and we get an infinite hang. Hence all the
626 games to pass in a file descriptor if it's actually needed. */
628 f = sysconf(_SC_OPEN_MAX);
630 where = "sysconf failed";
641 union control_un control;
644 struct cmsghdr *cmptr;
648 msg.msg_control = control.control;
649 msg.msg_controllen = sizeof(control.control);
650 /* We're a connected socket so we don't need a source */
654 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
656 vec[0].iov_base = (void*)⌖
657 vec[0].iov_len = sizeof(target);
659 got = recvmsg(sock, &msg, 0);
664 where = "recv failed";
667 if(got < sizeof(target)) {
668 where = "short recv";
672 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
676 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
677 where = "wrong cmsg_len";
680 if(cmptr->cmsg_level != SOL_SOCKET) {
681 where = "wrong cmsg_level";
684 if(cmptr->cmsg_type != SCM_RIGHTS) {
685 where = "wrong cmsg_type";
689 got_fd = *(int*)CMSG_DATA(cmptr);
690 /* For our last little bit of trickery, put the file descriptor
691 back into Perl_debug_log, as if we never actually closed it
693 if(got_fd != debug_fd) {
694 if (dup2(got_fd, debug_fd) == -1) {
701 PerlIO_flush(Perl_debug_log);
703 got = write(sock, &success, sizeof(success));
706 where = "write failed";
709 if(got < sizeof(success)) {
710 where = "short write";
717 int send_errno = errno;
718 unsigned char length = (unsigned char) strlen(where);
719 struct iovec failure[3] = {
720 {(void*)&send_errno, sizeof(send_errno)},
722 {(void*)where, length}
724 int got = writev(sock, failure, 3);
725 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
726 in the parent if we try to read from the socketpair after the
727 child has exited, even if there was data to read.
728 So sleep a bit to give the parent a fighting chance of
731 _exit((got == -1) ? errno : 0);
735 PL_dumper_fd = fd[0];
740 /* We must account for everything. */
742 /* Destroy the main CV and syntax tree */
743 /* Do this now, because destroying ops can cause new SVs to be generated
744 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
745 PL_curcop to point to a valid op from which the filename structure
747 PL_curcop = &PL_compiling;
749 /* ensure comppad/curpad to refer to main's pad */
750 if (CvPADLIST(PL_main_cv)) {
751 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
753 op_free(PL_main_root);
756 PL_main_start = NULL;
757 SvREFCNT_dec(PL_main_cv);
761 /* Tell PerlIO we are about to tear things apart in case
762 we have layers which are using resources that should
766 PerlIO_destruct(aTHX);
768 if (PL_sv_objcount) {
770 * Try to destruct global references. We do this first so that the
771 * destructors and destructees still exist. Some sv's might remain.
772 * Non-referenced objects are on their own.
776 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
777 PL_defoutgv = NULL; /* may have been freed */
780 /* unhook hooks which will soon be, or use, destroyed data */
781 SvREFCNT_dec(PL_warnhook);
783 SvREFCNT_dec(PL_diehook);
786 /* call exit list functions */
787 while (PL_exitlistlen-- > 0)
788 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
790 Safefree(PL_exitlist);
795 if (destruct_level == 0){
797 DEBUG_P(debprofdump());
799 #if defined(PERLIO_LAYERS)
800 /* No more IO - including error messages ! */
801 PerlIO_cleanup(aTHX);
804 /* The exit() function will do everything that needs doing. */
808 /* jettison our possibly duplicated environment */
809 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
810 * so we certainly shouldn't free it here
813 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
814 if (environ != PL_origenviron && !PL_use_safe_putenv
816 /* only main thread can free environ[0] contents */
817 && PL_curinterp == aTHX
823 for (i = 0; environ[i]; i++)
824 safesysfree(environ[i]);
826 /* Must use safesysfree() when working with environ. */
827 safesysfree(environ);
829 environ = PL_origenviron;
832 #endif /* !PERL_MICRO */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
844 I32 i = AvFILLp(PL_regex_padav) + 1;
845 SV * const * const ary = AvARRAY(PL_regex_padav);
848 SV * const resv = ary[--i];
850 if (SvFLAGS(resv) & SVf_BREAK) {
851 /* this is PL_reg_curpm, already freed
852 * flag is set in regexec.c:S_regtry
854 SvFLAGS(resv) &= ~SVf_BREAK;
856 else if(SvREPADTMP(resv)) {
857 SvREPADTMP_off(resv);
859 else if(SvIOKp(resv)) {
860 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
865 SvREFCNT_dec(PL_regex_padav);
866 PL_regex_padav = NULL;
870 SvREFCNT_dec((SV*) PL_stashcache);
871 PL_stashcache = NULL;
873 /* loosen bonds of global variables */
876 (void)PerlIO_close(PL_rsfp);
880 /* Filters for program text */
881 SvREFCNT_dec(PL_rsfp_filters);
882 PL_rsfp_filters = NULL;
885 PL_preprocess = FALSE;
891 PL_doswitches = FALSE;
892 PL_dowarn = G_WARN_OFF;
893 PL_doextract = FALSE;
894 PL_sawampersand = FALSE; /* must save all match strings */
897 Safefree(PL_inplace);
899 SvREFCNT_dec(PL_patchlevel);
902 SvREFCNT_dec(PL_e_script);
908 /* magical thingies */
910 SvREFCNT_dec(PL_ofs_sv); /* $, */
913 SvREFCNT_dec(PL_ors_sv); /* $\ */
916 SvREFCNT_dec(PL_rs); /* $/ */
919 Safefree(PL_osname); /* $^O */
922 SvREFCNT_dec(PL_statname);
926 /* defgv, aka *_ should be taken care of elsewhere */
928 /* clean up after study() */
929 SvREFCNT_dec(PL_lastscream);
930 PL_lastscream = NULL;
931 Safefree(PL_screamfirst);
933 Safefree(PL_screamnext);
937 Safefree(PL_efloatbuf);
941 /* startup and shutdown function lists */
942 SvREFCNT_dec(PL_beginav);
943 SvREFCNT_dec(PL_beginav_save);
944 SvREFCNT_dec(PL_endav);
945 SvREFCNT_dec(PL_checkav);
946 SvREFCNT_dec(PL_checkav_save);
947 SvREFCNT_dec(PL_initav);
949 PL_beginav_save = NULL;
952 PL_checkav_save = NULL;
955 /* shortcuts just get cleared */
964 PL_last_in_gv = NULL;
972 PL_DBassertion = NULL;
977 SvREFCNT_dec(PL_argvout_stack);
978 PL_argvout_stack = NULL;
980 SvREFCNT_dec(PL_modglobal);
982 SvREFCNT_dec(PL_preambleav);
983 PL_preambleav = NULL;
984 SvREFCNT_dec(PL_subname);
986 SvREFCNT_dec(PL_linestr);
988 #ifdef PERL_USES_PL_PIDSTATUS
989 SvREFCNT_dec(PL_pidstatus);
992 SvREFCNT_dec(PL_toptarget);
994 SvREFCNT_dec(PL_bodytarget);
995 PL_bodytarget = NULL;
996 PL_formtarget = NULL;
998 /* free locale stuff */
999 #ifdef USE_LOCALE_COLLATE
1000 Safefree(PL_collation_name);
1001 PL_collation_name = NULL;
1004 #ifdef USE_LOCALE_NUMERIC
1005 Safefree(PL_numeric_name);
1006 PL_numeric_name = NULL;
1007 SvREFCNT_dec(PL_numeric_radix_sv);
1008 PL_numeric_radix_sv = NULL;
1011 /* clear utf8 character classes */
1012 SvREFCNT_dec(PL_utf8_alnum);
1013 SvREFCNT_dec(PL_utf8_alnumc);
1014 SvREFCNT_dec(PL_utf8_ascii);
1015 SvREFCNT_dec(PL_utf8_alpha);
1016 SvREFCNT_dec(PL_utf8_space);
1017 SvREFCNT_dec(PL_utf8_cntrl);
1018 SvREFCNT_dec(PL_utf8_graph);
1019 SvREFCNT_dec(PL_utf8_digit);
1020 SvREFCNT_dec(PL_utf8_upper);
1021 SvREFCNT_dec(PL_utf8_lower);
1022 SvREFCNT_dec(PL_utf8_print);
1023 SvREFCNT_dec(PL_utf8_punct);
1024 SvREFCNT_dec(PL_utf8_xdigit);
1025 SvREFCNT_dec(PL_utf8_mark);
1026 SvREFCNT_dec(PL_utf8_toupper);
1027 SvREFCNT_dec(PL_utf8_totitle);
1028 SvREFCNT_dec(PL_utf8_tolower);
1029 SvREFCNT_dec(PL_utf8_tofold);
1030 SvREFCNT_dec(PL_utf8_idstart);
1031 SvREFCNT_dec(PL_utf8_idcont);
1032 PL_utf8_alnum = NULL;
1033 PL_utf8_alnumc = NULL;
1034 PL_utf8_ascii = NULL;
1035 PL_utf8_alpha = NULL;
1036 PL_utf8_space = NULL;
1037 PL_utf8_cntrl = NULL;
1038 PL_utf8_graph = NULL;
1039 PL_utf8_digit = NULL;
1040 PL_utf8_upper = NULL;
1041 PL_utf8_lower = NULL;
1042 PL_utf8_print = NULL;
1043 PL_utf8_punct = NULL;
1044 PL_utf8_xdigit = NULL;
1045 PL_utf8_mark = NULL;
1046 PL_utf8_toupper = NULL;
1047 PL_utf8_totitle = NULL;
1048 PL_utf8_tolower = NULL;
1049 PL_utf8_tofold = NULL;
1050 PL_utf8_idstart = NULL;
1051 PL_utf8_idcont = NULL;
1053 if (!specialWARN(PL_compiling.cop_warnings))
1054 PerlMemShared_free(PL_compiling.cop_warnings);
1055 PL_compiling.cop_warnings = NULL;
1056 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1057 PL_compiling.cop_hints_hash = NULL;
1058 CopFILE_free(&PL_compiling);
1059 CopSTASH_free(&PL_compiling);
1061 /* Prepare to destruct main symbol table. */
1066 SvREFCNT_dec(PL_curstname);
1067 PL_curstname = NULL;
1069 /* clear queued errors */
1070 SvREFCNT_dec(PL_errors);
1074 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1075 if (PL_scopestack_ix != 0)
1076 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1077 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1078 (long)PL_scopestack_ix);
1079 if (PL_savestack_ix != 0)
1080 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1081 "Unbalanced saves: %ld more saves than restores\n",
1082 (long)PL_savestack_ix);
1083 if (PL_tmps_floor != -1)
1084 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1085 (long)PL_tmps_floor + 1);
1086 if (cxstack_ix != -1)
1087 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1088 (long)cxstack_ix + 1);
1091 /* Now absolutely destruct everything, somehow or other, loops or no. */
1092 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1093 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1095 /* the 2 is for PL_fdpid and PL_strtab */
1096 while (PL_sv_count > 2 && sv_clean_all())
1099 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1100 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1101 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1102 SvFLAGS(PL_strtab) |= SVt_PVHV;
1104 AvREAL_off(PL_fdpid); /* no surviving entries */
1105 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1108 #ifdef HAVE_INTERP_INTERN
1112 /* Destruct the global string table. */
1114 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1115 * so that sv_free() won't fail on them.
1116 * Now that the global string table is using a single hunk of memory
1117 * for both HE and HEK, we either need to explicitly unshare it the
1118 * correct way, or actually free things here.
1121 const I32 max = HvMAX(PL_strtab);
1122 HE * const * const array = HvARRAY(PL_strtab);
1123 HE *hent = array[0];
1126 if (hent && ckWARN_d(WARN_INTERNAL)) {
1127 HE * const next = HeNEXT(hent);
1128 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1129 "Unbalanced string table refcount: (%ld) for \"%s\"",
1130 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1137 hent = array[riter];
1142 HvARRAY(PL_strtab) = 0;
1143 HvTOTALKEYS(PL_strtab) = 0;
1144 HvFILL(PL_strtab) = 0;
1146 SvREFCNT_dec(PL_strtab);
1149 /* free the pointer tables used for cloning */
1150 ptr_table_free(PL_ptr_table);
1151 PL_ptr_table = (PTR_TBL_t*)NULL;
1154 /* free special SVs */
1156 SvREFCNT(&PL_sv_yes) = 0;
1157 sv_clear(&PL_sv_yes);
1158 SvANY(&PL_sv_yes) = NULL;
1159 SvFLAGS(&PL_sv_yes) = 0;
1161 SvREFCNT(&PL_sv_no) = 0;
1162 sv_clear(&PL_sv_no);
1163 SvANY(&PL_sv_no) = NULL;
1164 SvFLAGS(&PL_sv_no) = 0;
1168 for (i=0; i<=2; i++) {
1169 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1170 sv_clear(PERL_DEBUG_PAD(i));
1171 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1172 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1176 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1177 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1179 #ifdef DEBUG_LEAKING_SCALARS
1180 if (PL_sv_count != 0) {
1185 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1186 svend = &sva[SvREFCNT(sva)];
1187 for (sv = sva + 1; sv < svend; ++sv) {
1188 if (SvTYPE(sv) != SVTYPEMASK) {
1189 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1191 " refcnt=%"UVuf pTHX__FORMAT "\n"
1192 "\tallocated at %s:%d %s %s%s\n",
1193 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1194 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1196 sv->sv_debug_inpad ? "for" : "by",
1197 sv->sv_debug_optype ?
1198 PL_op_name[sv->sv_debug_optype]: "(none)",
1199 sv->sv_debug_cloned ? " (cloned)" : ""
1201 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1202 Perl_dump_sv_child(aTHX_ sv);
1208 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1212 /* Wait for up to 4 seconds for child to terminate.
1213 This seems to be the least effort way of timing out on reaping
1215 struct timeval waitfor = {4, 0};
1216 int sock = PL_dumper_fd;
1220 FD_SET(sock, &rset);
1221 select(sock + 1, &rset, NULL, NULL, &waitfor);
1222 waitpid(child, &status, WNOHANG);
1230 #if defined(PERLIO_LAYERS)
1231 /* No more IO - including error messages ! */
1232 PerlIO_cleanup(aTHX);
1235 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1236 as currently layers use it rather than NULL as a marker
1237 for no arg - and will try and SvREFCNT_dec it.
1239 SvREFCNT(&PL_sv_undef) = 0;
1240 SvREADONLY_off(&PL_sv_undef);
1242 Safefree(PL_origfilename);
1243 PL_origfilename = NULL;
1244 Safefree(PL_reg_start_tmp);
1245 PL_reg_start_tmp = (char**)NULL;
1246 PL_reg_start_tmpl = 0;
1247 Safefree(PL_reg_curpm);
1248 Safefree(PL_reg_poscache);
1249 free_tied_hv_pool();
1250 Safefree(PL_op_mask);
1251 Safefree(PL_psig_ptr);
1252 PL_psig_ptr = (SV**)NULL;
1253 Safefree(PL_psig_name);
1254 PL_psig_name = (SV**)NULL;
1255 Safefree(PL_bitcount);
1257 Safefree(PL_psig_pend);
1258 PL_psig_pend = (int*)NULL;
1261 PL_tainting = FALSE;
1262 PL_taint_warn = FALSE;
1263 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1266 DEBUG_P(debprofdump());
1268 #ifdef USE_REENTRANT_API
1269 Perl_reentrant_free(aTHX);
1274 while (PL_regmatch_slab) {
1275 regmatch_slab *s = PL_regmatch_slab;
1276 PL_regmatch_slab = PL_regmatch_slab->next;
1280 /* As the absolutely last thing, free the non-arena SV for mess() */
1283 /* we know that type == SVt_PVMG */
1285 /* it could have accumulated taint magic */
1288 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1289 moremagic = mg->mg_moremagic;
1290 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1292 Safefree(mg->mg_ptr);
1296 /* we know that type >= SVt_PV */
1297 SvPV_free(PL_mess_sv);
1298 Safefree(SvANY(PL_mess_sv));
1299 Safefree(PL_mess_sv);
1306 =for apidoc perl_free
1308 Releases a Perl interpreter. See L<perlembed>.
1316 #ifdef PERL_TRACK_MEMPOOL
1319 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1320 * value as we're probably hunting memory leaks then
1322 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1323 if (!s || atoi(s) == 0) {
1324 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1325 thread at thread exit. */
1326 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1327 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1332 #if defined(WIN32) || defined(NETWARE)
1333 # if defined(PERL_IMPLICIT_SYS)
1336 void *host = nw_internal_host;
1338 void *host = w32_internal_host;
1340 PerlMem_free(aTHXx);
1342 nw_delete_internal_host(host);
1344 win32_delete_internal_host(host);
1348 PerlMem_free(aTHXx);
1351 PerlMem_free(aTHXx);
1355 #if defined(USE_ITHREADS)
1356 /* provide destructors to clean up the thread key when libperl is unloaded */
1357 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1359 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1360 #pragma fini "perl_fini"
1361 #elif defined(__sun) && !defined(__GNUC__)
1362 #pragma fini (perl_fini)
1366 #if defined(__GNUC__)
1367 __attribute__((destructor))
1377 #endif /* THREADS */
1380 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1383 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1384 PL_exitlist[PL_exitlistlen].fn = fn;
1385 PL_exitlist[PL_exitlistlen].ptr = ptr;
1389 #ifdef HAS_PROCSELFEXE
1390 /* This is a function so that we don't hold on to MAXPATHLEN
1391 bytes of stack longer than necessary
1394 S_procself_val(pTHX_ SV *sv, const char *arg0)
1396 char buf[MAXPATHLEN];
1397 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1399 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1400 includes a spurious NUL which will cause $^X to fail in system
1401 or backticks (this will prevent extensions from being built and
1402 many tests from working). readlink is not meant to add a NUL.
1403 Normal readlink works fine.
1405 if (len > 0 && buf[len-1] == '\0') {
1409 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1410 returning the text "unknown" from the readlink rather than the path
1411 to the executable (or returning an error from the readlink). Any valid
1412 path has a '/' in it somewhere, so use that to validate the result.
1413 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1415 if (len > 0 && memchr(buf, '/', len)) {
1416 sv_setpvn(sv,buf,len);
1422 #endif /* HAS_PROCSELFEXE */
1425 S_set_caret_X(pTHX) {
1427 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1429 #ifdef HAS_PROCSELFEXE
1430 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1433 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1435 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1442 =for apidoc perl_parse
1444 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1450 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1457 PERL_UNUSED_VAR(my_perl);
1459 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1462 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1463 setuid perl scripts securely.\n");
1464 #endif /* IAMSUID */
1467 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1468 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1469 * This MUST be done before any hash stores or fetches take place.
1470 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1471 * yourself, it is your responsibility to provide a good random seed!
1472 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1473 if (!PL_rehash_seed_set)
1474 PL_rehash_seed = get_hash_seed();
1476 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1478 if (s && (atoi(s) == 1))
1479 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1481 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1486 if (PL_origalen != 0) {
1487 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1490 /* Set PL_origalen be the sum of the contiguous argv[]
1491 * elements plus the size of the env in case that it is
1492 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1493 * as the maximum modifiable length of $0. In the worst case
1494 * the area we are able to modify is limited to the size of
1495 * the original argv[0]. (See below for 'contiguous', though.)
1497 const char *s = NULL;
1500 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1501 /* Do the mask check only if the args seem like aligned. */
1503 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1505 /* See if all the arguments are contiguous in memory. Note
1506 * that 'contiguous' is a loose term because some platforms
1507 * align the argv[] and the envp[]. If the arguments look
1508 * like non-aligned, assume that they are 'strictly' or
1509 * 'traditionally' contiguous. If the arguments look like
1510 * aligned, we just check that they are within aligned
1511 * PTRSIZE bytes. As long as no system has something bizarre
1512 * like the argv[] interleaved with some other data, we are
1513 * fine. (Did I just evoke Murphy's Law?) --jhi */
1514 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1516 for (i = 1; i < PL_origargc; i++) {
1517 if ((PL_origargv[i] == s + 1
1519 || PL_origargv[i] == s + 2
1524 (PL_origargv[i] > s &&
1526 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1536 /* Can we grab env area too to be used as the area for $0? */
1537 if (s && PL_origenviron) {
1538 if ((PL_origenviron[0] == s + 1
1540 || (PL_origenviron[0] == s + 9 && (s += 8))
1545 (PL_origenviron[0] > s &&
1546 PL_origenviron[0] <=
1547 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1551 s = PL_origenviron[0];
1554 my_setenv("NoNe SuCh", NULL);
1555 /* Force copy of environment. */
1556 for (i = 1; PL_origenviron[i]; i++) {
1557 if (PL_origenviron[i] == s + 1
1560 (PL_origenviron[i] > s &&
1561 PL_origenviron[i] <=
1562 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1565 s = PL_origenviron[i];
1573 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1578 /* Come here if running an undumped a.out. */
1580 PL_origfilename = savepv(argv[0]);
1581 PL_do_undump = FALSE;
1582 cxstack_ix = -1; /* start label stack again */
1584 assert (!PL_tainted);
1586 S_set_caret_X(aTHX);
1588 init_postdump_symbols(argc,argv,env);
1593 op_free(PL_main_root);
1594 PL_main_root = NULL;
1596 PL_main_start = NULL;
1597 SvREFCNT_dec(PL_main_cv);
1601 oldscope = PL_scopestack_ix;
1602 PL_dowarn = G_WARN_OFF;
1607 parse_body(env,xsinit);
1609 call_list(oldscope, PL_checkav);
1616 /* my_exit() was called */
1617 while (PL_scopestack_ix > oldscope)
1620 PL_curstash = PL_defstash;
1622 call_list(oldscope, PL_checkav);
1626 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1635 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1638 int argc = PL_origargc;
1639 char **argv = PL_origargv;
1640 const char *scriptname = NULL;
1641 VOL bool dosearch = FALSE;
1642 const char *validarg = "";
1645 const char *cddir = NULL;
1646 #ifdef USE_SITECUSTOMIZE
1647 bool minus_f = FALSE;
1650 sv_setpvn(PL_linestr,"",0);
1651 sv = newSVpvs(""); /* first used for -I flags */
1655 for (argc--,argv++; argc > 0; argc--,argv++) {
1656 if (argv[0][0] != '-' || !argv[0][1])
1660 validarg = " PHOOEY ";
1664 * Can we rely on the kernel to start scripts with argv[1] set to
1665 * contain all #! line switches (the whole line)? (argv[0] is set to
1666 * the interpreter name, argv[2] to the script name; argv[3] and
1667 * above may contain other arguments.)
1674 #ifndef PERL_STRICT_CR
1699 if ((s = moreswitches(s)))
1704 CHECK_MALLOC_TOO_LATE_FOR('t');
1705 if( !PL_tainting ) {
1706 PL_taint_warn = TRUE;
1712 CHECK_MALLOC_TOO_LATE_FOR('T');
1714 PL_taint_warn = FALSE;
1722 #ifdef MACOS_TRADITIONAL
1723 /* ignore -e for Dev:Pseudo argument */
1724 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1727 forbid_setid('e', -1);
1729 PL_e_script = newSVpvs("");
1730 filter_add(read_e_script, NULL);
1733 sv_catpv(PL_e_script, s);
1735 sv_catpv(PL_e_script, argv[1]);
1739 Perl_croak(aTHX_ "No code specified for -%c", *s);
1740 sv_catpvs(PL_e_script, "\n");
1744 #ifdef USE_SITECUSTOMIZE
1750 case 'I': /* -I handled both here and in moreswitches() */
1751 forbid_setid('I', -1);
1752 if (!*++s && (s=argv[1]) != NULL) {
1756 STRLEN len = strlen(s);
1757 const char * const p = savepvn(s, len);
1758 incpush(p, TRUE, TRUE, FALSE, FALSE);
1759 sv_catpvs(sv, "-I");
1760 sv_catpvn(sv, p, len);
1765 Perl_croak(aTHX_ "No directory specified for -I");
1768 forbid_setid('P', -1);
1769 PL_preprocess = TRUE;
1773 forbid_setid('S', -1);
1782 PL_preambleav = newAV();
1783 av_push(PL_preambleav,
1784 newSVpvs("use Config;"));
1788 opts_prog = newSVpvs("print Config::myconfig(),");
1790 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1792 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1794 opts = SvCUR(opts_prog);
1796 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1800 # ifdef DEBUG_LEAKING_SCALARS
1801 " DEBUG_LEAKING_SCALARS"
1803 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1804 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1806 # ifdef FAKE_THREADS
1809 # ifdef MULTIPLICITY
1818 # ifdef PERL_DONT_CREATE_GVSV
1819 " PERL_DONT_CREATE_GVSV"
1821 # ifdef PERL_GLOBAL_STRUCT
1822 " PERL_GLOBAL_STRUCT"
1824 # ifdef PERL_IMPLICIT_CONTEXT
1825 " PERL_IMPLICIT_CONTEXT"
1827 # ifdef PERL_IMPLICIT_SYS
1828 " PERL_IMPLICIT_SYS"
1833 # ifdef PERL_MALLOC_WRAP
1836 # ifdef PERL_NEED_APPCTX
1839 # ifdef PERL_NEED_TIMESBASE
1840 " PERL_NEED_TIMESBASE"
1842 # ifdef PERL_OLD_COPY_ON_WRITE
1843 " PERL_OLD_COPY_ON_WRITE"
1845 # ifdef PERL_TRACK_MEMPOOL
1846 " PERL_TRACK_MEMPOOL"
1848 # ifdef PERL_USE_SAFE_PUTENV
1849 " PERL_USE_SAFE_PUTENV"
1851 #ifdef PERL_USES_PL_PIDSTATUS
1852 " PERL_USES_PL_PIDSTATUS"
1854 # ifdef PL_OP_SLAB_ALLOC
1857 # ifdef THREADS_HAVE_PIDS
1858 " THREADS_HAVE_PIDS"
1860 # ifdef USE_64_BIT_ALL
1863 # ifdef USE_64_BIT_INT
1866 # ifdef USE_ITHREADS
1869 # ifdef USE_LARGE_FILES
1872 # ifdef USE_LONG_DOUBLE
1878 # ifdef USE_REENTRANT_API
1879 " USE_REENTRANT_API"
1884 # ifdef USE_SITECUSTOMIZE
1885 " USE_SITECUSTOMIZE"
1892 while (SvCUR(opts_prog) > opts+76) {
1893 /* find last space after "options: " and before col 76
1897 char * const pv = SvPV_nolen(opts_prog);
1898 const char c = pv[opts+76];
1900 space = strrchr(pv+opts+26, ' ');
1902 if (!space) break; /* "Can't happen" */
1904 /* break the line before that space */
1907 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1908 STR_WITH_LEN("\\n "));
1911 sv_catpvs(opts_prog,"\\n\",");
1913 #if defined(LOCAL_PATCH_COUNT)
1914 if (LOCAL_PATCH_COUNT > 0) {
1916 sv_catpvs(opts_prog,
1917 "\" Locally applied patches:\\n\",");
1918 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1919 if (PL_localpatches[i])
1920 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1921 0, PL_localpatches[i], 0);
1925 Perl_sv_catpvf(aTHX_ opts_prog,
1926 "\" Built under %s\\n\"",OSNAME);
1929 Perl_sv_catpvf(aTHX_ opts_prog,
1930 ",\" Compiled at %s %s\\n\"",__DATE__,
1933 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1937 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1938 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1939 "sort grep {/^PERL/} keys %ENV; ");
1941 sv_catpvs(opts_prog,
1942 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1944 sv_catpvs(opts_prog,
1945 "print \" \\%ENV:\\n @env\\n\" if @env;"
1946 "print \" \\@INC:\\n @INC\\n\";");
1950 opts_prog = Perl_newSVpvf(aTHX_
1951 "Config::config_vars(qw%c%s%c)",
1955 av_push(PL_preambleav, opts_prog);
1956 /* don't look for script or read stdin */
1957 scriptname = BIT_BUCKET;
1961 PL_doextract = TRUE;
1969 if (!*++s || isSPACE(*s)) {
1973 /* catch use of gnu style long options */
1974 if (strEQ(s, "version")) {
1978 if (strEQ(s, "help")) {
1985 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1991 #ifndef SECURE_INTERNAL_GETENV
1994 (s = PerlEnv_getenv("PERL5OPT")))
1996 const char *popt = s;
1999 if (*s == '-' && *(s+1) == 'T') {
2000 CHECK_MALLOC_TOO_LATE_FOR('T');
2002 PL_taint_warn = FALSE;
2005 char *popt_copy = NULL;
2018 if (!strchr("CDIMUdmtwA", *s))
2019 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2023 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2024 s = popt_copy + (s - popt);
2025 d = popt_copy + (d - popt);
2032 if( !PL_tainting ) {
2033 PL_taint_warn = TRUE;
2043 #ifdef USE_SITECUSTOMIZE
2046 PL_preambleav = newAV();
2047 av_unshift(PL_preambleav, 1);
2048 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2052 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2053 PL_compiling.cop_warnings
2054 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
2058 scriptname = argv[0];
2061 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2063 else if (scriptname == NULL) {
2065 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2071 /* Set $^X early so that it can be used for relocatable paths in @INC */
2072 assert (!PL_tainted);
2074 S_set_caret_X(aTHX);
2081 = open_script(scriptname, dosearch, sv, &suidscript);
2083 validate_suid(validarg, scriptname, fdscript, suidscript);
2086 # if defined(SIGCHLD) || defined(SIGCLD)
2089 # define SIGCHLD SIGCLD
2091 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2092 if (sigstate == (Sighandler_t) SIG_IGN) {
2093 if (ckWARN(WARN_SIGNAL))
2094 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2095 "Can't ignore signal CHLD, forcing to default");
2096 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2103 #ifdef MACOS_TRADITIONAL
2104 || gMacPerl_AlwaysExtract
2108 /* This will croak if suidscript is >= 0, as -x cannot be used with
2110 forbid_setid('x', suidscript);
2111 /* Hence you can't get here if suidscript >= 0 */
2114 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2115 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2119 PL_main_cv = PL_compcv = (CV*)newSV(0);
2120 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2121 CvUNIQUE_on(PL_compcv);
2123 CvPADLIST(PL_compcv) = pad_new(0);
2126 boot_core_UNIVERSAL();
2127 boot_core_xsutils();
2130 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2132 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2138 # ifdef HAS_SOCKS5_INIT
2139 socks5_init(argv[0]);
2145 init_predump_symbols();
2146 /* init_postdump_symbols not currently designed to be called */
2147 /* more than once (ENV isn't cleared first, for example) */
2148 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2150 init_postdump_symbols(argc,argv,env);
2152 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2153 * or explicitly in some platforms.
2154 * locale.c:Perl_init_i18nl10n() if the environment
2155 * look like the user wants to use UTF-8. */
2156 #if defined(__SYMBIAN32__)
2157 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2160 /* Requires init_predump_symbols(). */
2161 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2166 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2167 * and the default open disciplines. */
2168 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2169 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2171 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2172 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2173 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2175 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2176 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2177 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2179 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2180 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2181 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2183 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2184 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2187 sv_setpvn(sv, ":utf8\0:utf8", 11);
2189 sv_setpvn(sv, ":utf8\0", 6);
2192 sv_setpvn(sv, "\0:utf8", 6);
2198 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2199 if (strEQ(s, "unsafe"))
2200 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2201 else if (strEQ(s, "safe"))
2202 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2204 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2208 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2212 PL_xmlfp = PerlIO_stdout();
2214 PL_xmlfp = PerlIO_open(s, "w");
2216 Perl_croak(aTHX_ "Can't open %s", s);
2218 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2220 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2221 PL_madskills = atoi(s);
2222 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2228 /* now parse the script */
2230 SETERRNO(0,SS_NORMAL);
2232 #ifdef MACOS_TRADITIONAL
2233 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2235 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2237 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2238 MacPerl_MPWFileName(PL_origfilename));
2242 if (yyparse() || PL_error_count) {
2244 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2246 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2251 CopLINE_set(PL_curcop, 0);
2252 PL_curstash = PL_defstash;
2253 PL_preprocess = FALSE;
2255 SvREFCNT_dec(PL_e_script);
2263 SAVECOPFILE(PL_curcop);
2264 SAVECOPLINE(PL_curcop);
2265 gv_check(PL_defstash);
2272 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2273 dump_mstats("after compilation:");
2282 =for apidoc perl_run
2284 Tells a Perl interpreter to run. See L<perlembed>.
2297 PERL_UNUSED_CONTEXT;
2299 oldscope = PL_scopestack_ix;
2307 cxstack_ix = -1; /* start context stack again */
2309 case 0: /* normal completion */
2313 case 2: /* my_exit() */
2314 while (PL_scopestack_ix > oldscope)
2317 PL_curstash = PL_defstash;
2318 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2319 PL_endav && !PL_minus_c)
2320 call_list(oldscope, PL_endav);
2322 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2323 dump_mstats("after execution: ");
2329 POPSTACK_TO(PL_mainstack);
2332 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2344 S_run_body(pTHX_ I32 oldscope)
2347 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2348 PL_sawampersand ? "Enabling" : "Omitting"));
2350 if (!PL_restartop) {
2354 exit(0); /* less likely to core dump than my_exit(0) */
2357 DEBUG_x(dump_all());
2360 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2362 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2366 #ifdef MACOS_TRADITIONAL
2367 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2368 (gMacPerl_ErrorFormat ? "# " : ""),
2369 MacPerl_MPWFileName(PL_origfilename));
2371 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2375 if (PERLDB_SINGLE && PL_DBsingle)
2376 sv_setiv(PL_DBsingle, 1);
2378 call_list(oldscope, PL_initav);
2384 PL_op = PL_restartop;
2388 else if (PL_main_start) {
2389 CvDEPTH(PL_main_cv) = 1;
2390 PL_op = PL_main_start;
2398 =head1 SV Manipulation Functions
2400 =for apidoc p||get_sv
2402 Returns the SV of the specified Perl scalar. If C<create> is set and the
2403 Perl variable does not exist then it will be created. If C<create> is not
2404 set and the variable does not exist then NULL is returned.
2410 Perl_get_sv(pTHX_ const char *name, I32 create)
2413 gv = gv_fetchpv(name, create, SVt_PV);
2420 =head1 Array Manipulation Functions
2422 =for apidoc p||get_av
2424 Returns the AV of the specified Perl array. If C<create> is set and the
2425 Perl variable does not exist then it will be created. If C<create> is not
2426 set and the variable does not exist then NULL is returned.
2432 Perl_get_av(pTHX_ const char *name, I32 create)
2434 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2443 =head1 Hash Manipulation Functions
2445 =for apidoc p||get_hv
2447 Returns the HV of the specified Perl hash. If C<create> is set and the
2448 Perl variable does not exist then it will be created. If C<create> is not
2449 set and the variable does not exist then NULL is returned.
2455 Perl_get_hv(pTHX_ const char *name, I32 create)
2457 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2466 =head1 CV Manipulation Functions
2468 =for apidoc p||get_cv
2470 Returns the CV of the specified Perl subroutine. If C<create> is set and
2471 the Perl subroutine does not exist then it will be declared (which has the
2472 same effect as saying C<sub name;>). If C<create> is not set and the
2473 subroutine does not exist then NULL is returned.
2479 Perl_get_cv(pTHX_ const char *name, I32 create)
2481 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2482 /* XXX unsafe for threads if eval_owner isn't held */
2483 /* XXX this is probably not what they think they're getting.
2484 * It has the same effect as "sub name;", i.e. just a forward
2486 if (create && !GvCVu(gv))
2487 return newSUB(start_subparse(FALSE, 0),
2488 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2495 /* Be sure to refetch the stack pointer after calling these routines. */
2499 =head1 Callback Functions
2501 =for apidoc p||call_argv
2503 Performs a callback to the specified Perl sub. See L<perlcall>.
2509 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2511 /* See G_* flags in cop.h */
2512 /* null terminated arg list */
2520 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2525 return call_pv(sub_name, flags);
2529 =for apidoc p||call_pv
2531 Performs a callback to the specified Perl sub. See L<perlcall>.
2537 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2538 /* name of the subroutine */
2539 /* See G_* flags in cop.h */
2541 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2545 =for apidoc p||call_method
2547 Performs a callback to the specified Perl method. The blessed object must
2548 be on the stack. See L<perlcall>.
2554 Perl_call_method(pTHX_ const char *methname, I32 flags)
2555 /* name of the subroutine */
2556 /* See G_* flags in cop.h */
2558 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2561 /* May be called with any of a CV, a GV, or an SV containing the name. */
2563 =for apidoc p||call_sv
2565 Performs a callback to the Perl sub whose name is in the SV. See
2572 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2573 /* See G_* flags in cop.h */
2576 LOGOP myop; /* fake syntax tree node */
2579 volatile I32 retval = 0;
2581 bool oldcatch = CATCH_GET;
2583 OP* const oldop = PL_op;
2586 if (flags & G_DISCARD) {
2591 Zero(&myop, 1, LOGOP);
2592 myop.op_next = NULL;
2593 if (!(flags & G_NOARGS))
2594 myop.op_flags |= OPf_STACKED;
2595 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2596 (flags & G_ARRAY) ? OPf_WANT_LIST :
2601 EXTEND(PL_stack_sp, 1);
2602 *++PL_stack_sp = sv;
2604 oldscope = PL_scopestack_ix;
2606 if (PERLDB_SUB && PL_curstash != PL_debstash
2607 /* Handle first BEGIN of -d. */
2608 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2609 /* Try harder, since this may have been a sighandler, thus
2610 * curstash may be meaningless. */
2611 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2612 && !(flags & G_NODEBUG))
2613 PL_op->op_private |= OPpENTERSUB_DB;
2615 if (flags & G_METHOD) {
2616 Zero(&method_op, 1, UNOP);
2617 method_op.op_next = PL_op;
2618 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2619 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2620 PL_op = (OP*)&method_op;
2623 if (!(flags & G_EVAL)) {
2625 CALL_BODY_SUB((OP*)&myop);
2626 retval = PL_stack_sp - (PL_stack_base + oldmark);
2627 CATCH_SET(oldcatch);
2630 myop.op_other = (OP*)&myop;
2632 create_eval_scope(flags|G_FAKINGEVAL);
2640 CALL_BODY_SUB((OP*)&myop);
2641 retval = PL_stack_sp - (PL_stack_base + oldmark);
2642 if (!(flags & G_KEEPERR))
2643 sv_setpvn(ERRSV,"",0);
2649 /* my_exit() was called */
2650 PL_curstash = PL_defstash;
2653 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2654 Perl_croak(aTHX_ "Callback called exit");
2659 PL_op = PL_restartop;
2663 PL_stack_sp = PL_stack_base + oldmark;
2664 if (flags & G_ARRAY)
2668 *++PL_stack_sp = &PL_sv_undef;
2673 if (PL_scopestack_ix > oldscope)
2674 delete_eval_scope();
2678 if (flags & G_DISCARD) {
2679 PL_stack_sp = PL_stack_base + oldmark;
2688 /* Eval a string. The G_EVAL flag is always assumed. */
2691 =for apidoc p||eval_sv
2693 Tells Perl to C<eval> the string in the SV.
2699 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2701 /* See G_* flags in cop.h */
2705 UNOP myop; /* fake syntax tree node */
2706 volatile I32 oldmark = SP - PL_stack_base;
2707 volatile I32 retval = 0;
2709 OP* const oldop = PL_op;
2712 if (flags & G_DISCARD) {
2719 Zero(PL_op, 1, UNOP);
2720 EXTEND(PL_stack_sp, 1);
2721 *++PL_stack_sp = sv;
2723 if (!(flags & G_NOARGS))
2724 myop.op_flags = OPf_STACKED;
2725 myop.op_next = NULL;
2726 myop.op_type = OP_ENTEREVAL;
2727 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2728 (flags & G_ARRAY) ? OPf_WANT_LIST :
2730 if (flags & G_KEEPERR)
2731 myop.op_flags |= OPf_SPECIAL;
2733 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2734 * before a PUSHEVAL, which corrupts the stack after a croak */
2735 TAINT_PROPER("eval_sv()");
2741 CALL_BODY_EVAL((OP*)&myop);
2742 retval = PL_stack_sp - (PL_stack_base + oldmark);
2743 if (!(flags & G_KEEPERR))
2744 sv_setpvn(ERRSV,"",0);
2750 /* my_exit() was called */
2751 PL_curstash = PL_defstash;
2754 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2755 Perl_croak(aTHX_ "Callback called exit");
2760 PL_op = PL_restartop;
2764 PL_stack_sp = PL_stack_base + oldmark;
2765 if (flags & G_ARRAY)
2769 *++PL_stack_sp = &PL_sv_undef;
2775 if (flags & G_DISCARD) {
2776 PL_stack_sp = PL_stack_base + oldmark;
2786 =for apidoc p||eval_pv
2788 Tells Perl to C<eval> the given string and return an SV* result.
2794 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2798 SV* sv = newSVpv(p, 0);
2800 eval_sv(sv, G_SCALAR);
2807 if (croak_on_error && SvTRUE(ERRSV)) {
2808 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2814 /* Require a module. */
2817 =head1 Embedding Functions
2819 =for apidoc p||require_pv
2821 Tells Perl to C<require> the file named by the string argument. It is
2822 analogous to the Perl code C<eval "require '$file'">. It's even
2823 implemented that way; consider using load_module instead.
2828 Perl_require_pv(pTHX_ const char *pv)
2833 PUSHSTACKi(PERLSI_REQUIRE);
2835 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2836 eval_sv(sv_2mortal(sv), G_DISCARD);
2842 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2844 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2847 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2851 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2853 /* This message really ought to be max 23 lines.
2854 * Removed -h because the user already knows that option. Others? */
2856 static const char * const usage_msg[] = {
2857 "-0[octal] specify record separator (\\0, if no argument)",
2858 "-A[mod][=pattern] activate all/given assertions",
2859 "-a autosplit mode with -n or -p (splits $_ into @F)",
2860 "-C[number/list] enables the listed Unicode features",
2861 "-c check syntax only (runs BEGIN and CHECK blocks)",
2862 "-d[:debugger] run program under debugger",
2863 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2864 "-e program one line of program (several -e's allowed, omit programfile)",
2865 "-E program like -e, but enables all optional features",
2866 "-f don't do $sitelib/sitecustomize.pl at startup",
2867 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2868 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2869 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2870 "-l[octal] enable line ending processing, specifies line terminator",
2871 "-[mM][-]module execute \"use/no module...\" before executing program",
2872 "-n assume \"while (<>) { ... }\" loop around program",
2873 "-p assume loop like -n but print line also, like sed",
2874 "-P run program through C preprocessor before compilation",
2875 "-s enable rudimentary parsing for switches after programfile",
2876 "-S look for programfile using PATH environment variable",
2877 "-t enable tainting warnings",
2878 "-T enable tainting checks",
2879 "-u dump core after parsing program",
2880 "-U allow unsafe operations",
2881 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2882 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2883 "-w enable many useful warnings (RECOMMENDED)",
2884 "-W enable all warnings",
2885 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2886 "-X disable all warnings",
2890 const char * const *p = usage_msg;
2892 PerlIO_printf(PerlIO_stdout(),
2893 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2896 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2899 /* convert a string of -D options (or digits) into an int.
2900 * sets *s to point to the char after the options */
2904 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2906 static const char * const usage_msgd[] = {
2907 " Debugging flag values: (see also -d)",
2908 " p Tokenizing and parsing (with v, displays parse stack)",
2909 " s Stack snapshots (with v, displays all stacks)",
2910 " l Context (loop) stack processing",
2911 " t Trace execution",
2912 " o Method and overloading resolution",
2913 " c String/numeric conversions",
2914 " P Print profiling info, preprocessor command for -P, source file input state",
2915 " m Memory allocation",
2916 " f Format processing",
2917 " r Regular expression parsing and execution",
2918 " x Syntax tree dump",
2919 " u Tainting checks",
2920 " H Hash dump -- usurps values()",
2921 " X Scratchpad allocation",
2923 " S Thread synchronization",
2925 " R Include reference counts of dumped variables (eg when using -Ds)",
2926 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2927 " v Verbose: use in conjunction with other flags",
2929 " A Consistency checks on internal structures",
2930 " q quiet - currently only suppresses the 'EXECUTING' message",
2935 /* if adding extra options, remember to update DEBUG_MASK */
2936 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2938 for (; isALNUM(**s); (*s)++) {
2939 const char * const d = strchr(debopts,**s);
2941 i |= 1 << (d - debopts);
2942 else if (ckWARN_d(WARN_DEBUGGING))
2943 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2944 "invalid option -D%c, use -D'' to see choices\n", **s);
2947 else if (isDIGIT(**s)) {
2949 for (; isALNUM(**s); (*s)++) ;
2951 else if (givehelp) {
2952 const char *const *p = usage_msgd;
2953 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2956 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2957 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2958 "-Dp not implemented on this platform\n");
2964 /* This routine handles any switches that can be given during run */
2967 Perl_moreswitches(pTHX_ char *s)
2978 SvREFCNT_dec(PL_rs);
2979 if (s[1] == 'x' && s[2]) {
2980 const char *e = s+=2;
2986 flags = PERL_SCAN_SILENT_ILLDIGIT;
2987 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2988 if (s + numlen < e) {
2989 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2993 PL_rs = newSVpvs("");
2994 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2995 tmps = (U8*)SvPVX(PL_rs);
2996 uvchr_to_utf8(tmps, rschar);
2997 SvCUR_set(PL_rs, UNISKIP(rschar));
3002 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3003 if (rschar & ~((U8)~0))
3004 PL_rs = &PL_sv_undef;
3005 else if (!rschar && numlen >= 2)
3006 PL_rs = newSVpvs("");
3008 char ch = (char)rschar;
3009 PL_rs = newSVpvn(&ch, 1);
3012 sv_setsv(get_sv("/", TRUE), PL_rs);
3017 PL_unicode = parse_unicode_opts( (const char **)&s );
3018 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3024 while (*s && !isSPACE(*s)) ++s;
3025 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3036 forbid_setid('d', -1);
3039 /* -dt indicates to the debugger that threads will be used */
3040 if (*s == 't' && !isALNUM(s[1])) {
3042 my_setenv("PERL5DB_THREADED", "1");
3045 /* The following permits -d:Mod to accepts arguments following an =
3046 in the fashion that -MSome::Mod does. */
3047 if (*s == ':' || *s == '=') {
3049 SV * const sv = newSVpvs("use Devel::");
3051 /* We now allow -d:Module=Foo,Bar */
3052 while(isALNUM(*s) || *s==':') ++s;
3054 sv_catpv(sv, start);
3056 sv_catpvn(sv, start, s-start);
3057 /* Don't use NUL as q// delimiter here, this string goes in the
3059 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3062 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3065 PL_perldb = PERLDB_ALL;
3072 forbid_setid('D', -1);
3074 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3075 #else /* !DEBUGGING */
3076 if (ckWARN_d(WARN_DEBUGGING))
3077 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3078 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3079 for (s++; isALNUM(*s); s++) ;
3084 usage(PL_origargv[0]);
3087 Safefree(PL_inplace);
3088 #if defined(__CYGWIN__) /* do backup extension automagically */
3089 if (*(s+1) == '\0') {
3090 PL_inplace = savepvs(".bak");
3093 #endif /* __CYGWIN__ */
3095 const char * const start = ++s;
3096 while (*s && !isSPACE(*s))
3099 PL_inplace = savepvn(start, s - start);
3103 if (*s == '-') /* Additional switches on #! line. */
3107 case 'I': /* -I handled both here and in parse_body() */
3108 forbid_setid('I', -1);
3110 while (*s && isSPACE(*s))
3115 /* ignore trailing spaces (possibly followed by other switches) */
3117 for (e = p; *e && !isSPACE(*e); e++) ;
3121 } while (*p && *p != '-');
3122 e = savepvn(s, e-s);
3123 incpush(e, TRUE, TRUE, FALSE, FALSE);
3130 Perl_croak(aTHX_ "No directory specified for -I");
3136 SvREFCNT_dec(PL_ors_sv);
3142 PL_ors_sv = newSVpvs("\n");
3143 numlen = 3 + (*s == '0');
3144 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3148 if (RsPARA(PL_rs)) {
3149 PL_ors_sv = newSVpvs("\n\n");
3152 PL_ors_sv = newSVsv(PL_rs);
3157 forbid_setid('A', -1);
3159 PL_preambleav = newAV();
3162 char * const start = s;
3163 SV * const sv = newSVpvs("use assertions::activate");
3164 while(isALNUM(*s) || *s == ':') ++s;
3166 sv_catpvs(sv, "::");
3167 sv_catpvn(sv, start, s-start);
3170 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3173 else if (*s != '\0') {
3174 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3176 av_push(PL_preambleav, sv);
3180 forbid_setid('M', -1); /* XXX ? */
3183 forbid_setid('m', -1); /* XXX ? */
3187 const char *use = "use ";
3188 /* -M-foo == 'no foo' */
3189 /* Leading space on " no " is deliberate, to make both
3190 possibilities the same length. */
3191 if (*s == '-') { use = " no "; ++s; }
3192 sv = newSVpvn(use,4);
3194 /* We allow -M'Module qw(Foo Bar)' */
3195 while(isALNUM(*s) || *s==':') ++s;
3197 sv_catpv(sv, start);
3198 if (*(start-1) == 'm') {
3200 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3201 sv_catpvs( sv, " ()");
3205 Perl_croak(aTHX_ "Module name required with -%c option",
3207 sv_catpvn(sv, start, s-start);
3208 sv_catpvs(sv, " split(/,/,q");
3209 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3211 sv_catpvs(sv, "\0)");
3215 PL_preambleav = newAV();
3216 av_push(PL_preambleav, sv);
3219 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3230 forbid_setid('s', -1);
3231 PL_doswitches = TRUE;
3245 #ifdef MACOS_TRADITIONAL
3246 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3248 PL_do_undump = TRUE;
3256 if (!sv_derived_from(PL_patchlevel, "version"))
3257 upg_version(PL_patchlevel);
3259 PerlIO_printf(PerlIO_stdout(),
3260 Perl_form(aTHX_ "\nThis is perl, %"SVf
3261 #ifdef PERL_PATCHNUM
3262 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3265 (void*)vstringify(PL_patchlevel),
3268 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3269 PerlIO_printf(PerlIO_stdout(),
3270 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3271 vstringify(PL_patchlevel)));
3272 PerlIO_printf(PerlIO_stdout(),
3273 Perl_form(aTHX_ " built under %s at %s %s\n",
3274 OSNAME, __DATE__, __TIME__));
3275 PerlIO_printf(PerlIO_stdout(),
3276 Perl_form(aTHX_ " OS Specific Release: %s\n",
3280 #if defined(LOCAL_PATCH_COUNT)
3281 if (LOCAL_PATCH_COUNT > 0)
3282 PerlIO_printf(PerlIO_stdout(),
3283 "\n(with %d registered patch%s, "
3284 "see perl -V for more detail)",
3286 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "\n\nCopyright 1987-2006, Larry Wall\n");
3291 #ifdef MACOS_TRADITIONAL
3292 PerlIO_printf(PerlIO_stdout(),
3293 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3294 "maintained by Chris Nandor\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3303 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3308 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "atariST series port, ++jrb bammi@cadence.com\n");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3335 PerlIO_printf(PerlIO_stdout(),
3336 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "MiNT port by Guido Flohr, 1997-1999\n");
3343 PerlIO_printf(PerlIO_stdout(),
3344 "EPOC port by Olaf Flebbe, 1999-2002\n");
3347 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3348 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3351 #ifdef __SYMBIAN32__
3352 PerlIO_printf(PerlIO_stdout(),
3353 "Symbian port by Nokia, 2004-2005\n");
3355 #ifdef BINARY_BUILD_NOTICE
3356 BINARY_BUILD_NOTICE;
3358 PerlIO_printf(PerlIO_stdout(),
3360 Perl may be copied only under the terms of either the Artistic License or the\n\
3361 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3362 Complete documentation for Perl, including FAQ lists, should be found on\n\
3363 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3364 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3367 if (! (PL_dowarn & G_WARN_ALL_MASK))
3368 PL_dowarn |= G_WARN_ON;
3372 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3373 if (!specialWARN(PL_compiling.cop_warnings))
3374 PerlMemShared_free(PL_compiling.cop_warnings);
3375 PL_compiling.cop_warnings = pWARN_ALL ;
3379 PL_dowarn = G_WARN_ALL_OFF;
3380 if (!specialWARN(PL_compiling.cop_warnings))
3381 PerlMemShared_free(PL_compiling.cop_warnings);
3382 PL_compiling.cop_warnings = pWARN_NONE ;
3387 if (s[1] == '-') /* Additional switches on #! line. */
3392 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3398 #ifdef ALTERNATE_SHEBANG
3399 case 'S': /* OS/2 needs -S on "extproc" line. */
3407 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3412 /* compliments of Tom Christiansen */
3414 /* unexec() can be found in the Gnu emacs distribution */
3415 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3418 Perl_my_unexec(pTHX)
3420 PERL_UNUSED_CONTEXT;
3422 SV * prog = newSVpv(BIN_EXP, 0);
3423 SV * file = newSVpv(PL_origfilename, 0);
3427 sv_catpvs(prog, "/perl");
3428 sv_catpvs(file, ".perldump");
3430 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3431 /* unexec prints msg to stderr in case of failure */
3432 PerlProc_exit(status);
3435 # include <lib$routines.h>
3436 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3437 # elif defined(WIN32) || defined(__CYGWIN__)
3438 Perl_croak(aTHX_ "dump is not supported");
3440 ABORT(); /* for use with undump */
3445 /* initialize curinterp */
3451 # define PERLVAR(var,type)
3452 # define PERLVARA(var,n,type)
3453 # if defined(PERL_IMPLICIT_CONTEXT)
3454 # define PERLVARI(var,type,init) aTHX->var = init;
3455 # define PERLVARIC(var,type,init) aTHX->var = init;
3457 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3458 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3460 # include "intrpvar.h"
3461 # include "thrdvar.h"
3467 # define PERLVAR(var,type)
3468 # define PERLVARA(var,n,type)
3469 # define PERLVARI(var,type,init) PL_##var = init;
3470 # define PERLVARIC(var,type,init) PL_##var = init;
3471 # include "intrpvar.h"
3472 # include "thrdvar.h"
3479 /* As these are inside a structure, PERLVARI isn't capable of initialising
3482 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3483 PL_reg_poscache = PL_reg_starttry = NULL;
3487 S_init_main_stash(pTHX)
3492 PL_curstash = PL_defstash = newHV();
3493 /* We know that the string "main" will be in the global shared string
3494 table, so it's a small saving to use it rather than allocate another
3496 PL_curstname = newSVpvs_share("main");
3497 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3498 /* If we hadn't caused another reference to "main" to be in the shared
3499 string table above, then it would be worth reordering these two,
3500 because otherwise all we do is delete "main" from it as a consequence
3501 of the SvREFCNT_dec, only to add it again with hv_name_set */
3502 SvREFCNT_dec(GvHV(gv));
3503 hv_name_set(PL_defstash, "main", 4, 0);
3504 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3506 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3508 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3509 GvMULTI_on(PL_incgv);
3510 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3511 GvMULTI_on(PL_hintgv);
3512 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3513 SvREFCNT_inc_simple(PL_defgv);
3514 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3515 SvREFCNT_inc_simple(PL_errgv);
3516 GvMULTI_on(PL_errgv);
3517 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3518 GvMULTI_on(PL_replgv);
3519 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3520 #ifdef PERL_DONT_CREATE_GVSV
3523 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3524 sv_setpvn(ERRSV, "", 0);
3525 PL_curstash = PL_defstash;
3526 CopSTASH_set(&PL_compiling, PL_defstash);
3527 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3528 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3530 /* We must init $/ before switches are processed. */
3531 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3535 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3541 const char *cpp_discard_flag;
3550 PL_origfilename = savepvs("-e");
3553 /* if find_script() returns, it returns a malloc()-ed value */
3554 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3556 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3557 const char *s = scriptname + 8;
3563 * Tell apart "normal" usage of fdscript, e.g.
3564 * with bash on FreeBSD:
3565 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3566 * from usage in suidperl.
3567 * Does any "normal" usage leave garbage after the number???
3568 * Is it a mistake to use a similar /dev/fd/ construct for
3573 * Be supersafe and do some sanity-checks.
3574 * Still, can we be sure we got the right thing?
3577 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3580 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3582 scriptname = savepv(s + 1);
3583 Safefree(PL_origfilename);
3584 PL_origfilename = (char *)scriptname;
3589 CopFILE_free(PL_curcop);
3590 CopFILE_set(PL_curcop, PL_origfilename);
3591 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3592 scriptname = (char *)"";
3593 if (fdscript >= 0) {
3594 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3595 # if defined(HAS_FCNTL) && defined(F_SETFD)
3597 /* ensure close-on-exec */
3598 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3603 Perl_croak(aTHX_ "sperl needs fd script\n"
3604 "You should not call sperl directly; do you need to "
3605 "change a #! line\nfrom sperl to perl?\n");
3608 * Do not open (or do other fancy stuff) while setuid.
3609 * Perl does the open, and hands script to suidperl on a fd;
3610 * suidperl only does some checks, sets up UIDs and re-execs
3611 * perl with that fd as it has always done.
3614 if (*suidscript != 1) {
3615 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3618 else if (PL_preprocess) {
3619 const char * const cpp_cfg = CPPSTDIN;
3620 SV * const cpp = newSVpvs("");
3621 SV * const cmd = newSV(0);
3623 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3624 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3625 if (strEQ(cpp_cfg, "cppstdin"))
3626 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3627 sv_catpv(cpp, cpp_cfg);
3630 sv_catpvs(sv, "-I");
3631 sv_catpv(sv,PRIVLIB_EXP);
3634 DEBUG_P(PerlIO_printf(Perl_debug_log,
3635 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3636 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3639 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3646 cpp_discard_flag = "";
3648 cpp_discard_flag = "-C";
3652 perl = os2_execname(aTHX);
3654 perl = PL_origargv[0];
3658 /* This strips off Perl comments which might interfere with
3659 the C pre-processor, including #!. #line directives are
3660 deliberately stripped to avoid confusion with Perl's version
3661 of #line. FWP played some golf with it so it will fit
3662 into VMS's 255 character buffer.
3665 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3667 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3669 Perl_sv_setpvf(aTHX_ cmd, "\
3670 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3671 perl, quote, code, quote, scriptname, (void*)cpp,
3672 cpp_discard_flag, (void*)sv, CPPMINUS);
3674 PL_doextract = FALSE;
3676 DEBUG_P(PerlIO_printf(Perl_debug_log,
3677 "PL_preprocess: cmd=\"%s\"\n",
3680 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3684 else if (!*scriptname) {
3685 forbid_setid(0, *suidscript);
3686 PL_rsfp = PerlIO_stdin();
3689 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3690 # if defined(HAS_FCNTL) && defined(F_SETFD)
3692 /* ensure close-on-exec */
3693 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3696 #endif /* IAMSUID */
3698 /* PSz 16 Sep 03 Keep neat error message */
3700 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3702 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3703 CopFILE(PL_curcop), Strerror(errno));
3709 * I_SYSSTATVFS HAS_FSTATVFS
3711 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3712 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3713 * here so that metaconfig picks them up. */
3717 S_fd_on_nosuid_fs(pTHX_ int fd)
3720 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3721 * but is needed also on machines without setreuid.
3722 * Seems safe enough to run as root.
3724 int check_okay = 0; /* able to do all the required sys/libcalls */
3725 int on_nosuid = 0; /* the fd is on a nosuid fs */
3727 * Need to check noexec also: nosuid might not be set, the average
3728 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3730 int on_noexec = 0; /* the fd is on a noexec fs */
3733 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3734 * fstatvfs() is UNIX98.
3735 * fstatfs() is 4.3 BSD.
3736 * ustat()+getmnt() is pre-4.3 BSD.
3737 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3738 * an irrelevant filesystem while trying to reach the right one.
3741 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3743 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3744 defined(HAS_FSTATVFS)
3745 # define FD_ON_NOSUID_CHECK_OKAY
3746 struct statvfs stfs;
3748 check_okay = fstatvfs(fd, &stfs) == 0;
3749 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3751 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3752 on platforms where it is present. */
3753 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3755 # endif /* fstatvfs */
3757 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3758 defined(PERL_MOUNT_NOSUID) && \
3759 defined(PERL_MOUNT_NOEXEC) && \
3760 defined(HAS_FSTATFS) && \
3761 defined(HAS_STRUCT_STATFS) && \
3762 defined(HAS_STRUCT_STATFS_F_FLAGS)
3763 # define FD_ON_NOSUID_CHECK_OKAY
3766 check_okay = fstatfs(fd, &stfs) == 0;
3767 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3768 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3769 # endif /* fstatfs */
3771 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3772 defined(PERL_MOUNT_NOSUID) && \
3773 defined(PERL_MOUNT_NOEXEC) && \
3774 defined(HAS_FSTAT) && \
3775 defined(HAS_USTAT) && \
3776 defined(HAS_GETMNT) && \
3777 defined(HAS_STRUCT_FS_DATA) && \
3779 # define FD_ON_NOSUID_CHECK_OKAY
3782 if (fstat(fd, &fdst) == 0) {
3784 if (ustat(fdst.st_dev, &us) == 0) {
3786 /* NOSTAT_ONE here because we're not examining fields which
3787 * vary between that case and STAT_ONE. */
3788 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3789 size_t cmplen = sizeof(us.f_fname);
3790 if (sizeof(fsd.fd_req.path) < cmplen)
3791 cmplen = sizeof(fsd.fd_req.path);
3792 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3793 fdst.st_dev == fsd.fd_req.dev) {
3795 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3796 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3801 # endif /* fstat+ustat+getmnt */
3803 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3804 defined(HAS_GETMNTENT) && \
3805 defined(HAS_HASMNTOPT) && \
3806 defined(MNTOPT_NOSUID) && \
3807 defined(MNTOPT_NOEXEC)
3808 # define FD_ON_NOSUID_CHECK_OKAY
3809 FILE *mtab = fopen("/etc/mtab", "r");
3810 struct mntent *entry;
3813 if (mtab && (fstat(fd, &stb) == 0)) {
3814 while (entry = getmntent(mtab)) {
3815 if (stat(entry->mnt_dir, &fsb) == 0
3816 && fsb.st_dev == stb.st_dev)
3818 /* found the filesystem */
3820 if (hasmntopt(entry, MNTOPT_NOSUID))
3822 if (hasmntopt(entry, MNTOPT_NOEXEC))
3825 } /* A single fs may well fail its stat(). */
3830 # endif /* getmntent+hasmntopt */
3833 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3835 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3837 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3838 return ((!check_okay) || on_nosuid || on_noexec);
3840 #endif /* IAMSUID */
3843 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3844 int fdscript, int suidscript)
3849 #endif /* IAMSUID */
3851 /* do we need to emulate setuid on scripts? */
3853 /* This code is for those BSD systems that have setuid #! scripts disabled
3854 * in the kernel because of a security problem. Merely defining DOSUID
3855 * in perl will not fix that problem, but if you have disabled setuid
3856 * scripts in the kernel, this will attempt to emulate setuid and setgid
3857 * on scripts that have those now-otherwise-useless bits set. The setuid
3858 * root version must be called suidperl or sperlN.NNN. If regular perl
3859 * discovers that it has opened a setuid script, it calls suidperl with
3860 * the same argv that it had. If suidperl finds that the script it has
3861 * just opened is NOT setuid root, it sets the effective uid back to the
3862 * uid. We don't just make perl setuid root because that loses the
3863 * effective uid we had before invoking perl, if it was different from the
3866 * Description/comments above do not match current workings:
3867 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3868 * suidperl called with script open and name changed to /dev/fd/N/X;
3869 * suidperl croaks if script is not setuid;
3870 * making perl setuid would be a huge security risk (and yes, that
3871 * would lose any euid we might have had).
3873 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3874 * be defined in suidperl only. suidperl must be setuid root. The
3875 * Configure script will set this up for you if you want it.
3881 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3882 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3883 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3885 const char *linestr;
3889 if (fdscript < 0 || suidscript != 1)
3890 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3892 * Since the script is opened by perl, not suidperl, some of these
3893 * checks are superfluous. Leaving them in probably does not lower
3897 * Do checks even for systems with no HAS_SETREUID.
3898 * We used to swap, then re-swap UIDs with
3900 if (setreuid(PL_euid,PL_uid) < 0
3901 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3902 Perl_croak(aTHX_ "Can't swap uid and euid");
3905 if (setreuid(PL_uid,PL_euid) < 0
3906 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3907 Perl_croak(aTHX_ "Can't reswap uid and euid");
3911 /* On this access check to make sure the directories are readable,
3912 * there is actually a small window that the user could use to make
3913 * filename point to an accessible directory. So there is a faint
3914 * chance that someone could execute a setuid script down in a
3915 * non-accessible directory. I don't know what to do about that.
3916 * But I don't think it's too important. The manual lies when
3917 * it says access() is useful in setuid programs.
3919 * So, access() is pretty useless... but not harmful... do anyway.
3921 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3922 Perl_croak(aTHX_ "Can't access() script\n");
3925 /* If we can swap euid and uid, then we can determine access rights
3926 * with a simple stat of the file, and then compare device and
3927 * inode to make sure we did stat() on the same file we opened.
3928 * Then we just have to make sure he or she can execute it.
3931 * As the script is opened by perl, not suidperl, we do not need to
3932 * care much about access rights.
3934 * The 'script changed' check is needed, or we can get lied to
3935 * about $0 with e.g.
3936 * suidperl /dev/fd/4//bin/x 4<setuidscript
3937 * Without HAS_SETREUID, is it safe to stat() as root?
3939 * Are there any operating systems that pass /dev/fd/xxx for setuid
3940 * scripts, as suggested/described in perlsec(1)? Surely they do not
3941 * pass the script name as we do, so the "script changed" test would
3942 * fail for them... but we never get here with
3943 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3945 * This is one place where we must "lie" about return status: not
3946 * say if the stat() failed. We are doing this as root, and could
3947 * be tricked into reporting existence or not of files that the
3948 * "plain" user cannot even see.
3952 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3953 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3954 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3955 Perl_croak(aTHX_ "Setuid script changed\n");
3959 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3960 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3963 * We used to do this check as the "plain" user (after swapping
3964 * UIDs). But the check for nosuid and noexec filesystem is needed,
3965 * and should be done even without HAS_SETREUID. (Maybe those
3966 * operating systems do not have such mount options anyway...)
3967 * Seems safe enough to do as root.
3969 #if !defined(NO_NOSUID_CHECK)
3970 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3971 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3974 #endif /* IAMSUID */
3976 if (!S_ISREG(PL_statbuf.st_mode)) {
3977 Perl_croak(aTHX_ "Setuid script not plain file\n");
3979 if (PL_statbuf.st_mode & S_IWOTH)
3980 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3981 PL_doswitches = FALSE; /* -s is insecure in suid */
3982 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3983 CopLINE_inc(PL_curcop);
3984 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3985 Perl_croak(aTHX_ "No #! line");
3986 linestr = SvPV_nolen_const(PL_linestr);
3987 /* required even on Sys V */
3988 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3989 Perl_croak(aTHX_ "No #! line");
3993 /* Sanity check on line length */
3994 s_end = s + strlen(s);
3995 if (s_end == s || (s_end - s) > 4000)
3996 Perl_croak(aTHX_ "Very long #! line");
3997 /* Allow more than a single space after #! */
3998 while (isSPACE(*s)) s++;
3999 /* Sanity check on buffer end */
4000 while ((*s) && !isSPACE(*s)) s++;
4001 for (s2 = s; (s2 > linestr &&
4002 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4003 || s2[-1] == '-')); s2--) ;
4004 /* Sanity check on buffer start */
4005 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4006 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4007 Perl_croak(aTHX_ "Not a perl script");
4008 while (*s == ' ' || *s == '\t') s++;
4010 * #! arg must be what we saw above. They can invoke it by
4011 * mentioning suidperl explicitly, but they may not add any strange
4012 * arguments beyond what #! says if they do invoke suidperl that way.
4015 * The way validarg was set up, we rely on the kernel to start
4016 * scripts with argv[1] set to contain all #! line switches (the
4020 * Check that we got all the arguments listed in the #! line (not
4021 * just that there are no extraneous arguments). Might not matter
4022 * much, as switches from #! line seem to be acted upon (also), and
4023 * so may be checked and trapped in perl. But, security checks must
4024 * be done in suidperl and not deferred to perl. Note that suidperl
4025 * does not get around to parsing (and checking) the switches on
4026 * the #! line (but execs perl sooner).
4027 * Allow (require) a trailing newline (which may be of two
4028 * characters on some architectures?) (but no other trailing
4031 len = strlen(validarg);
4032 if (strEQ(validarg," PHOOEY ") ||
4033 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4034 !((s_end - s) == len+1
4035 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4036 Perl_croak(aTHX_ "Args must match #! line");
4040 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4041 PL_euid == PL_statbuf.st_uid)
4043 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4044 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4045 #endif /* IAMSUID */
4048 PL_euid) { /* oops, we're not the setuid root perl */
4050 * When root runs a setuid script, we do not go through the same
4051 * steps of execing sperl and then perl with fd scripts, but
4052 * simply set up UIDs within the same perl invocation; so do
4053 * not have the same checks (on options, whatever) that we have
4054 * for plain users. No problem really: would have to be a script
4055 * that does not actually work for plain users; and if root is
4056 * foolish and can be persuaded to run such an unsafe script, he
4057 * might run also non-setuid ones, and deserves what he gets.
4059 * Or, we might drop the PL_euid check above (and rely just on
4060 * fdscript to avoid loops), and do the execs
4066 * Pass fd script to suidperl.
4067 * Exec suidperl, substituting fd script for scriptname.
4068 * Pass script name as "subdir" of fd, which perl will grok;
4069 * in fact will use that to distinguish this from "normal"
4070 * usage, see comments above.
4072 PerlIO_rewind(PL_rsfp);
4073 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4074 /* PSz 27 Feb 04 Sanity checks on scriptname */
4075 if ((!scriptname) || (!*scriptname) ) {
4076 Perl_croak(aTHX_ "No setuid script name\n");
4078 if (*scriptname == '-') {
4079 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4080 /* Or we might confuse it with an option when replacing
4081 * name in argument list, below (though we do pointer, not
4082 * string, comparisons).
4085 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4086 if (!PL_origargv[which]) {
4087 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4089 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4090 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4091 #if defined(HAS_FCNTL) && defined(F_SETFD)
4092 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4095 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4096 (int)PERL_REVISION, (int)PERL_VERSION,
4097 (int)PERL_SUBVERSION), PL_origargv);
4099 #endif /* IAMSUID */
4100 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4103 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4105 * This seems back to front: we try HAS_SETEGID first; if not available
4106 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4107 * in the sense that we only want to set EGID; but are there any machines
4108 * with either of the latter, but not the former? Same with UID, later.
4111 (void)setegid(PL_statbuf.st_gid);
4114 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4116 #ifdef HAS_SETRESGID
4117 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4119 PerlProc_setgid(PL_statbuf.st_gid);
4123 if (PerlProc_getegid() != PL_statbuf.st_gid)
4124 Perl_croak(aTHX_ "Can't do setegid!\n");
4126 if (PL_statbuf.st_mode & S_ISUID) {
4127 if (PL_statbuf.st_uid != PL_euid)
4129 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4132 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4134 #ifdef HAS_SETRESUID
4135 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4137 PerlProc_setuid(PL_statbuf.st_uid);
4141 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4142 Perl_croak(aTHX_ "Can't do seteuid!\n");
4144 else if (PL_uid) { /* oops, mustn't run as root */
4146 (void)seteuid((Uid_t)PL_uid);
4149 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4151 #ifdef HAS_SETRESUID
4152 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4154 PerlProc_setuid((Uid_t)PL_uid);
4158 if (PerlProc_geteuid() != PL_uid)
4159 Perl_croak(aTHX_ "Can't do seteuid!\n");
4162 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4163 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4166 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4167 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4168 else if (fdscript < 0 || suidscript != 1)
4169 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4170 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4172 /* PSz 16 Sep 03 Keep neat error message */
4173 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4176 /* We absolutely must clear out any saved ids here, so we */
4177 /* exec the real perl, substituting fd script for scriptname. */
4178 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4180 * It might be thought that using setresgid and/or setresuid (changed to
4181 * set the saved IDs) above might obviate the need to exec, and we could
4182 * go on to "do the perl thing".
4184 * Is there such a thing as "saved GID", and is that set for setuid (but
4185 * not setgid) execution like suidperl? Without exec, it would not be
4186 * cleared for setuid (but not setgid) scripts (or might need a dummy
4189 * We need suidperl to do the exact same argument checking that perl
4190 * does. Thus it cannot be very small; while it could be significantly
4191 * smaller, it is safer (simpler?) to make it essentially the same
4192 * binary as perl (but they are not identical). - Maybe could defer that
4193 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4194 * but prefer to do thorough checks in suidperl itself. Such deferral
4195 * would make suidperl security rely on perl, a design no-no.
4197 * Setuid things should be short and simple, thus easy to understand and
4198 * verify. They should do their "own thing", without influence by
4199 * attackers. It may help if their internal execution flow is fixed,
4200 * regardless of platform: it may be best to exec anyway.
4202 * Suidperl should at least be conceptually simple: a wrapper only,
4203 * never to do any real perl. Maybe we should put
4205 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4207 * into the perly bits.
4209 PerlIO_rewind(PL_rsfp);
4210 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4212 * Keep original arguments: suidperl already has fd script.
4214 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4215 /* if (!PL_origargv[which]) { */
4216 /* errno = EPERM; */
4217 /* Perl_croak(aTHX_ "Permission denied\n"); */
4219 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4220 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4221 #if defined(HAS_FCNTL) && defined(F_SETFD)
4222 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4225 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4226 (int)PERL_REVISION, (int)PERL_VERSION,
4227 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4229 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4230 #endif /* IAMSUID */
4232 PERL_UNUSED_ARG(fdscript);
4233 PERL_UNUSED_ARG(suidscript);
4234 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4235 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4236 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4237 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4239 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4242 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4243 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4244 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4245 /* not set-id, must be wrapped */
4248 PERL_UNUSED_ARG(validarg);
4249 PERL_UNUSED_ARG(scriptname);
4253 S_find_beginning(pTHX)
4257 register const char *s2;
4258 #ifdef MACOS_TRADITIONAL
4262 /* skip forward in input to the real script? */
4264 #ifdef MACOS_TRADITIONAL
4265 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4267 while (PL_doextract || gMacPerl_AlwaysExtract) {
4268 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4269 if (!gMacPerl_AlwaysExtract)
4270 Perl_croak(aTHX_ "No Perl script found in input\n");
4272 if (PL_doextract) /* require explicit override ? */
4273 if (!OverrideExtract(PL_origfilename))
4274 Perl_croak(aTHX_ "User aborted script\n");
4276 PL_doextract = FALSE;
4278 /* Pater peccavi, file does not have #! */
4279 PerlIO_rewind(PL_rsfp);
4284 while (PL_doextract) {
4285 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4286 Perl_croak(aTHX_ "No Perl script found in input\n");
4289 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4290 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4291 PL_doextract = FALSE;
4292 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4294 while (*s == ' ' || *s == '\t') s++;
4296 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4297 || s2[-1] == '_') s2--;
4298 if (strnEQ(s2-4,"perl",4))
4299 while ((s = moreswitches(s)))
4302 #ifdef MACOS_TRADITIONAL
4303 /* We are always searching for the #!perl line in MacPerl,
4304 * so if we find it, still keep the line count correct
4305 * by counting lines we already skipped over
4307 for (; maclines > 0 ; maclines--)
4308 PerlIO_ungetc(PL_rsfp, '\n');
4312 /* gMacPerl_AlwaysExtract is false in MPW tool */
4313 } else if (gMacPerl_AlwaysExtract) {
4325 PL_uid = PerlProc_getuid();
4326 PL_euid = PerlProc_geteuid();
4327 PL_gid = PerlProc_getgid();
4328 PL_egid = PerlProc_getegid();
4330 PL_uid |= PL_gid << 16;
4331 PL_euid |= PL_egid << 16;
4333 /* Should not happen: */
4334 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4335 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4338 * Should go by suidscript, not uid!=euid: why disallow
4339 * system("ls") in scripts run from setuid things?
4340 * Or, is this run before we check arguments and set suidscript?
4341 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4342 * (We never have suidscript, can we be sure to have fdscript?)
4343 * Or must then go by UID checks? See comments in forbid_setid also.
4347 /* This is used very early in the lifetime of the program,
4348 * before even the options are parsed, so PL_tainting has
4349 * not been initialized properly. */
4351 Perl_doing_taint(int argc, char *argv[], char *envp[])
4353 #ifndef PERL_IMPLICIT_SYS
4354 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4355 * before we have an interpreter-- and the whole point of this
4356 * function is to be called at such an early stage. If you are on
4357 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4358 * "tainted because running with altered effective ids', you'll
4359 * have to add your own checks somewhere in here. The two most
4360 * known samples of 'implicitness' are Win32 and NetWare, neither
4361 * of which has much of concept of 'uids'. */
4362 int uid = PerlProc_getuid();
4363 int euid = PerlProc_geteuid();
4364 int gid = PerlProc_getgid();
4365 int egid = PerlProc_getegid();
4372 if (uid && (euid != uid || egid != gid))
4374 #endif /* !PERL_IMPLICIT_SYS */
4375 /* This is a really primitive check; environment gets ignored only
4376 * if -T are the first chars together; otherwise one gets
4377 * "Too late" message. */
4378 if ( argc > 1 && argv[1][0] == '-'
4379 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4384 /* Passing the flag as a single char rather than a string is a slight space
4385 optimisation. The only message that isn't /^-.$/ is
4386 "program input from stdin", which is substituted in place of '\0', which
4387 could never be a command line flag. */
4389 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4392 char string[3] = "-x";
4393 const char *message = "program input from stdin";
4400 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4401 if (PL_euid != PL_uid)
4402 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4403 if (PL_egid != PL_gid)
4404 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4405 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4407 * Checks for UID/GID above "wrong": why disallow
4408 * perl -e 'print "Hello\n"'
4409 * from within setuid things?? Simply drop them: replaced by
4410 * fdscript/suidscript and #ifdef IAMSUID checks below.
4412 * This may be too late for command-line switches. Will catch those on
4413 * the #! line, after finding the script name and setting up
4414 * fdscript/suidscript. Note that suidperl does not get around to
4415 * parsing (and checking) the switches on the #! line, but checks that
4416 * the two sets are identical.
4418 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4419 * instead, or would that be "too late"? (We never have suidscript, can
4420 * we be sure to have fdscript?)
4422 * Catch things with suidscript (in descendant of suidperl), even with
4423 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4424 * below; but I am paranoid.
4426 * Also see comments about root running a setuid script, elsewhere.
4428 if (suidscript >= 0)
4429 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4431 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4432 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4433 #endif /* IAMSUID */
4437 Perl_init_debugger(pTHX)
4440 HV * const ostash = PL_curstash;
4442 PL_curstash = PL_debstash;
4443 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4445 AvREAL_off(PL_dbargs);
4446 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4447 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4448 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4449 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4450 sv_setiv(PL_DBsingle, 0);
4451 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4452 sv_setiv(PL_DBtrace, 0);
4453 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4454 sv_setiv(PL_DBsignal, 0);
4455 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4456 sv_setiv(PL_DBassertion, 0);
4457 PL_curstash = ostash;
4460 #ifndef STRESS_REALLOC
4461 #define REASONABLE(size) (size)
4463 #define REASONABLE(size) (1) /* unreasonable */
4467 Perl_init_stacks(pTHX)
4470 /* start with 128-item stack and 8K cxstack */
4471 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4472 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4473 PL_curstackinfo->si_type = PERLSI_MAIN;
4474 PL_curstack = PL_curstackinfo->si_stack;
4475 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4477 PL_stack_base = AvARRAY(PL_curstack);
4478 PL_stack_sp = PL_stack_base;
4479 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4481 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4484 PL_tmps_max = REASONABLE(128);
4486 Newx(PL_markstack,REASONABLE(32),I32);
4487 PL_markstack_ptr = PL_markstack;
4488 PL_markstack_max = PL_markstack + REASONABLE(32);
4492 Newx(PL_scopestack,REASONABLE(32),I32);
4493 PL_scopestack_ix = 0;
4494 PL_scopestack_max = REASONABLE(32);
4496 Newx(PL_savestack,REASONABLE(128),ANY);
4497 PL_savestack_ix = 0;
4498 PL_savestack_max = REASONABLE(128);
4507 while (PL_curstackinfo->si_next)
4508 PL_curstackinfo = PL_curstackinfo->si_next;
4509 while (PL_curstackinfo) {
4510 PERL_SI *p = PL_curstackinfo->si_prev;
4511 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4512 Safefree(PL_curstackinfo->si_cxstack);
4513 Safefree(PL_curstackinfo);
4514 PL_curstackinfo = p;
4516 Safefree(PL_tmps_stack);
4517 Safefree(PL_markstack);
4518 Safefree(PL_scopestack);
4519 Safefree(PL_savestack);
4529 lex_start(PL_linestr);
4531 PL_subname = newSVpvs("main");
4535 S_init_predump_symbols(pTHX)
4541 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4542 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4543 GvMULTI_on(PL_stdingv);
4544 io = GvIOp(PL_stdingv);
4545 IoTYPE(io) = IoTYPE_RDONLY;
4546 IoIFP(io) = PerlIO_stdin();
4547 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4549 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4551 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4554 IoTYPE(io) = IoTYPE_WRONLY;
4555 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4557 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4559 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4561 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4562 GvMULTI_on(PL_stderrgv);
4563 io = GvIOp(PL_stderrgv);
4564 IoTYPE(io) = IoTYPE_WRONLY;
4565 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4566 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4568 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4570 PL_statname = newSV(0); /* last filename we did stat on */
4572 Safefree(PL_osname);
4573 PL_osname = savepv(OSNAME);
4577 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4580 argc--,argv++; /* skip name of script */
4581 if (PL_doswitches) {
4582 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4586 if (argv[0][1] == '-' && !argv[0][2]) {
4590 if ((s = strchr(argv[0], '='))) {
4591 const char *const start_name = argv[0] + 1;
4592 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4593 TRUE, SVt_PV)), s + 1);
4596 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4599 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4600 GvMULTI_on(PL_argvgv);
4601 (void)gv_AVadd(PL_argvgv);
4602 av_clear(GvAVn(PL_argvgv));
4603 for (; argc > 0; argc--,argv++) {
4604 SV * const sv = newSVpv(argv[0],0);
4605 av_push(GvAVn(PL_argvgv),sv);
4606 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4607 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4610 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4611 (void)sv_utf8_decode(sv);
4617 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4622 PL_toptarget = newSV(0);
4623 sv_upgrade(PL_toptarget, SVt_PVFM);
4624 sv_setpvn(PL_toptarget, "", 0);
4625 PL_bodytarget = newSV(0);
4626 sv_upgrade(PL_bodytarget, SVt_PVFM);
4627 sv_setpvn(PL_bodytarget, "", 0);
4628 PL_formtarget = PL_bodytarget;
4632 init_argv_symbols(argc,argv);
4634 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4635 #ifdef MACOS_TRADITIONAL
4636 /* $0 is not majick on a Mac */
4637 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4639 sv_setpv(GvSV(tmpgv),PL_origfilename);
4640 magicname("0", "0", 1);
4643 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4645 GvMULTI_on(PL_envgv);
4646 hv = GvHVn(PL_envgv);
4647 hv_magic(hv, NULL, PERL_MAGIC_env);
4649 #ifdef USE_ENVIRON_ARRAY
4650 /* Note that if the supplied env parameter is actually a copy
4651 of the global environ then it may now point to free'd memory
4652 if the environment has been modified since. To avoid this
4653 problem we treat env==NULL as meaning 'use the default'
4658 # ifdef USE_ITHREADS
4659 && PL_curinterp == aTHX
4666 char** origenv = environ;
4669 for (; *env; env++) {
4670 if (!(s = strchr(*env,'=')) || s == *env)
4672 #if defined(MSDOS) && !defined(DJGPP)
4677 sv = newSVpv(s+1, 0);
4678 (void)hv_store(hv, *env, s - *env, sv, 0);
4681 if (origenv != environ) {
4682 /* realloc has shifted us */
4683 env = (env - origenv) + environ;
4688 #endif /* USE_ENVIRON_ARRAY */
4689 #endif /* !PERL_MICRO */
4692 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4693 SvREADONLY_off(GvSV(tmpgv));
4694 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4695 SvREADONLY_on(GvSV(tmpgv));
4697 #ifdef THREADS_HAVE_PIDS
4698 PL_ppid = (IV)getppid();
4701 /* touch @F array to prevent spurious warnings 20020415 MJD */
4703 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4705 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4706 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4707 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4711 S_init_perllib(pTHX)
4717 s = PerlEnv_getenv("PERL5LIB");
4719 * It isn't possible to delete an environment variable with
4720 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4721 * case we treat PERL5LIB as undefined if it has a zero-length value.
4723 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4724 if (s && *s != '\0')
4728 incpush(s, TRUE, TRUE, TRUE, FALSE);
4730 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4732 /* Treat PERL5?LIB as a possible search list logical name -- the
4733 * "natural" VMS idiom for a Unix path string. We allow each
4734 * element to be a set of |-separated directories for compatibility.
4738 if (my_trnlnm("PERL5LIB",buf,0))
4739 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4741 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4745 /* Use the ~-expanded versions of APPLLIB (undocumented),
4746 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4749 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4753 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4755 #ifdef MACOS_TRADITIONAL
4758 SV * privdir = newSV(0);
4759 char * macperl = PerlEnv_getenv("MACPERL");
4764 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4765 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4766 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4767 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4768 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4769 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4771 SvREFCNT_dec(privdir);
4774 incpush(":", FALSE, FALSE, TRUE, FALSE);
4777 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4780 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4782 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4786 /* sitearch is always relative to sitelib on Windows for
4787 * DLL-based path intuition to work correctly */
4788 # if !defined(WIN32)
4789 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4795 /* this picks up sitearch as well */
4796 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4798 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4802 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4803 /* Search for version-specific dirs below here */
4804 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4807 #ifdef PERL_VENDORARCH_EXP
4808 /* vendorarch is always relative to vendorlib on Windows for
4809 * DLL-based path intuition to work correctly */
4810 # if !defined(WIN32)
4811 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4815 #ifdef PERL_VENDORLIB_EXP
4817 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4819 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4823 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4824 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4827 #ifdef PERL_OTHERLIBDIRS
4828 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4832 incpush(".", FALSE, FALSE, TRUE, FALSE);
4833 #endif /* MACOS_TRADITIONAL */
4836 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4837 # define PERLLIB_SEP ';'
4840 # define PERLLIB_SEP '|'
4842 # if defined(MACOS_TRADITIONAL)
4843 # define PERLLIB_SEP ','
4845 # define PERLLIB_SEP ':'
4849 #ifndef PERLLIB_MANGLE
4850 # define PERLLIB_MANGLE(s,n) (s)
4853 /* Push a directory onto @INC if it exists.
4854 Generate a new SV if we do this, to save needing to copy the SV we push
4857 S_incpush_if_exists(pTHX_ SV *dir)
4861 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4862 S_ISDIR(tmpstatbuf.st_mode)) {
4863 av_push(GvAVn(PL_incgv), dir);
4870 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4875 const char *p = dir;
4880 if (addsubdirs || addoldvers) {
4884 /* Break at all separators */
4886 SV *libdir = newSV(0);
4889 /* skip any consecutive separators */
4891 while ( *p == PERLLIB_SEP ) {
4892 /* Uncomment the next line for PATH semantics */
4893 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4898 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4899 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4904 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4905 p = NULL; /* break out */
4907 #ifdef MACOS_TRADITIONAL
4908 if (!strchr(SvPVX(libdir), ':')) {
4911 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4913 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4914 sv_catpvs(libdir, ":");
4917 /* Do the if() outside the #ifdef to avoid warnings about an unused
4920 #ifdef PERL_RELOCATABLE_INC
4922 * Relocatable include entries are marked with a leading .../
4925 * 0: Remove that leading ".../"
4926 * 1: Remove trailing executable name (anything after the last '/')
4927 * from the perl path to give a perl prefix
4929 * While the @INC element starts "../" and the prefix ends with a real
4930 * directory (ie not . or ..) chop that real directory off the prefix
4931 * and the leading "../" from the @INC element. ie a logical "../"
4933 * Finally concatenate the prefix and the remainder of the @INC element
4934 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4935 * generates /usr/local/lib/perl5
4937 const char *libpath = SvPVX(libdir);
4938 STRLEN libpath_len = SvCUR(libdir);
4939 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4941 SV * const caret_X = get_sv("\030", 0);
4942 /* Going to use the SV just as a scratch buffer holding a C
4948 /* $^X is *the* source of taint if tainting is on, hence
4949 SvPOK() won't be true. */
4951 assert(SvPOKp(caret_X));
4952 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4953 /* Firstly take off the leading .../
4954 If all else fail we'll do the paths relative to the current
4956 sv_chop(libdir, libpath + 4);
4957 /* Don't use SvPV as we're intentionally bypassing taining,
4958 mortal copies that the mg_get of tainting creates, and
4959 corruption that seems to come via the save stack.
4960 I guess that the save stack isn't correctly set up yet. */
4961 libpath = SvPVX(libdir);
4962 libpath_len = SvCUR(libdir);
4964 /* This would work more efficiently with memrchr, but as it's
4965 only a GNU extension we'd need to probe for it and
4966 implement our own. Not hard, but maybe not worth it? */
4968 prefix = SvPVX(prefix_sv);
4969 lastslash = strrchr(prefix, '/');
4971 /* First time in with the *lastslash = '\0' we just wipe off
4972 the trailing /perl from (say) /usr/foo/bin/perl
4976 while ((*lastslash = '\0'), /* Do that, come what may. */
4977 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4978 && (lastslash = strrchr(prefix, '/')))) {
4979 if (lastslash[1] == '\0'
4980 || (lastslash[1] == '.'
4981 && (lastslash[2] == '/' /* ends "/." */
4982 || (lastslash[2] == '/'
4983 && lastslash[3] == '/' /* or "/.." */
4985 /* Prefix ends "/" or "/." or "/..", any of which
4986 are fishy, so don't do any more logical cleanup.
4990 /* Remove leading "../" from path */
4993 /* Next iteration round the loop removes the last
4994 directory name from prefix by writing a '\0' in
4995 the while clause. */
4997 /* prefix has been terminated with a '\0' to the correct
4998 length. libpath points somewhere into the libdir SV.
4999 We need to join the 2 with '/' and drop the result into
5001 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5002 SvREFCNT_dec(libdir);
5003 /* And this is the new libdir. */
5006 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5007 /* Need to taint reloccated paths if running set ID */
5008 SvTAINTED_on(libdir);
5011 SvREFCNT_dec(prefix_sv);
5016 * BEFORE pushing libdir onto @INC we may first push version- and
5017 * archname-specific sub-directories.
5019 if (addsubdirs || addoldvers) {
5020 #ifdef PERL_INC_VERSION_LIST
5021 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5022 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5023 const char * const *incver;
5029 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5031 while (unix[len-1] == '/') len--; /* Cosmetic */
5032 sv_usepvn(libdir,unix,len);
5035 PerlIO_printf(Perl_error_log,
5036 "Failed to unixify @INC element \"%s\"\n",
5040 #ifdef MACOS_TRADITIONAL
5041 #define PERL_AV_SUFFIX_FMT ""
5042 #define PERL_ARCH_FMT "%s:"
5043 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5045 #define PERL_AV_SUFFIX_FMT "/"
5046 #define PERL_ARCH_FMT "/%s"
5047 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5049 /* .../version/archname if -d .../version/archname */
5050 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5052 (int)PERL_REVISION, (int)PERL_VERSION,
5053 (int)PERL_SUBVERSION, ARCHNAME);
5054 subdir = S_incpush_if_exists(aTHX_ subdir);
5056 /* .../version if -d .../version */
5057 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5059 (int)PERL_REVISION, (int)PERL_VERSION,
5060 (int)PERL_SUBVERSION);
5061 subdir = S_incpush_if_exists(aTHX_ subdir);
5063 /* .../archname if -d .../archname */
5064 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5065 (void*)libdir, ARCHNAME);
5066 subdir = S_incpush_if_exists(aTHX_ subdir);
5070 #ifdef PERL_INC_VERSION_LIST
5072 for (incver = incverlist; *incver; incver++) {
5073 /* .../xxx if -d .../xxx */
5074 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5075 subdir = S_incpush_if_exists(aTHX_ subdir);
5081 /* finally push this lib directory on the end of @INC */
5082 av_push(GvAVn(PL_incgv), libdir);
5085 assert (SvREFCNT(subdir) == 1);
5086 SvREFCNT_dec(subdir);
5092 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5096 const line_t oldline = CopLINE(PL_curcop);
5102 while (av_len(paramList) >= 0) {
5103 cv = (CV*)av_shift(paramList);
5105 if (paramList == PL_beginav) {
5106 /* save PL_beginav for compiler */
5107 if (! PL_beginav_save)
5108 PL_beginav_save = newAV();
5109 av_push(PL_beginav_save, (SV*)cv);
5111 else if (paramList == PL_checkav) {
5112 /* save PL_checkav for compiler */
5113 if (! PL_checkav_save)
5114 PL_checkav_save = newAV();
5115 av_push(PL_checkav_save, (SV*)cv);
5126 PL_madskills |= 16384;
5131 PL_madskills &= ~16384;
5134 (void)SvPV_const(atsv, len);
5135 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5136 break; /* not really trying to run, so just wing it */
5138 PL_curcop = &PL_compiling;
5139 CopLINE_set(PL_curcop, oldline);
5140 if (paramList == PL_beginav)
5141 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5143 Perl_sv_catpvf(aTHX_ atsv,
5144 "%s failed--call queue aborted",
5145 paramList == PL_checkav ? "CHECK"
5146 : paramList == PL_initav ? "INIT"
5148 while (PL_scopestack_ix > oldscope)
5151 Perl_croak(aTHX_ "%"SVf"", (void*)atsv);
5158 /* my_exit() was called */
5159 while (PL_scopestack_ix > oldscope)
5162 PL_curstash = PL_defstash;
5163 PL_curcop = &PL_compiling;
5164 CopLINE_set(PL_curcop, oldline);
5166 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5167 return; /* not really trying to run, so just wing it */
5168 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5169 if (paramList == PL_beginav)
5170 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5172 Perl_croak(aTHX_ "%s failed--call queue aborted",
5173 paramList == PL_checkav ? "CHECK"
5174 : paramList == PL_initav ? "INIT"
5181 PL_curcop = &PL_compiling;
5182 CopLINE_set(PL_curcop, oldline);
5185 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5194 Perl_my_exit(pTHX_ U32 status)
5197 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5198 thr, (unsigned long) status));
5207 STATUS_EXIT_SET(status);
5214 Perl_my_failure_exit(pTHX)
5218 /* We have been called to fall on our sword. The desired exit code
5219 * should be already set in STATUS_UNIX, but could be shifted over
5220 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5223 * If an error code has not been set, then force the issue.
5225 if (MY_POSIX_EXIT) {
5227 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5228 * the exit code when there isn't an error.
5231 if (STATUS_UNIX == 0)
5232 STATUS_UNIX_EXIT_SET(255);
5234 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5236 /* The exit code could have been set by $? or vmsish which
5237 * means that it may not be fatal. So convert
5238 * success/warning codes to fatal.
5240 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5241 STATUS_UNIX_EXIT_SET(255);
5245 /* Traditionally Perl on VMS always expects a Fatal Error. */
5246 if (vaxc$errno & 1) {
5248 /* So force success status to failure */
5249 if (STATUS_NATIVE & 1)
5254 STATUS_UNIX = EINTR; /* In case something cares */
5259 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5261 /* Encode the severity code */
5262 severity = STATUS_NATIVE & STS$M_SEVERITY;
5263 STATUS_UNIX = (severity ? severity : 1) << 8;
5265 /* Perl expects this to be a fatal error */
5266 if (severity != STS$K_SEVERE)
5275 STATUS_UNIX_SET(errno);
5277 exitstatus = STATUS_UNIX >> 8;
5278 if (exitstatus & 255)
5279 STATUS_UNIX_SET(exitstatus);
5281 STATUS_UNIX_SET(255);
5288 S_my_exit_jump(pTHX)
5293 SvREFCNT_dec(PL_e_script);
5297 POPSTACK_TO(PL_mainstack);
5305 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5308 const char * const p = SvPVX_const(PL_e_script);
5309 const char *nl = strchr(p, '\n');
5311 PERL_UNUSED_ARG(idx);
5312 PERL_UNUSED_ARG(maxlen);
5314 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5316 filter_del(read_e_script);
5319 sv_catpvn(buf_sv, p, nl-p);
5320 sv_chop(PL_e_script, nl);
5326 * c-indentation-style: bsd
5328 * indent-tabs-mode: t
5331 * ex: set ts=8 sts=4 sw=4 noet: