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)
248 PERL_UNUSED_ARG(my_perl);
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 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
544 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
548 PERL_UNUSED_ARG(my_perl);
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 /* jettison our possibly duplicated environment */
796 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
797 * so we certainly shouldn't free it here
800 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
801 if (environ != PL_origenviron && !PL_use_safe_putenv
803 /* only main thread can free environ[0] contents */
804 && PL_curinterp == aTHX
810 for (i = 0; environ[i]; i++)
811 safesysfree(environ[i]);
813 /* Must use safesysfree() when working with environ. */
814 safesysfree(environ);
816 environ = PL_origenviron;
819 #endif /* !PERL_MICRO */
821 if (destruct_level == 0) {
823 DEBUG_P(debprofdump());
825 #if defined(PERLIO_LAYERS)
826 /* No more IO - including error messages ! */
827 PerlIO_cleanup(aTHX);
830 CopFILE_free(&PL_compiling);
831 CopSTASH_free(&PL_compiling);
833 /* The exit() function will do everything that needs doing. */
837 /* reset so print() ends up where we expect */
841 /* the syntax tree is shared between clones
842 * so op_free(PL_main_root) only ReREFCNT_dec's
843 * REGEXPs in the parent interpreter
844 * we need to manually ReREFCNT_dec for the clones
847 I32 i = AvFILLp(PL_regex_padav) + 1;
848 SV * const * const ary = AvARRAY(PL_regex_padav);
851 SV * const resv = ary[--i];
853 if (SvFLAGS(resv) & SVf_BREAK) {
854 /* this is PL_reg_curpm, already freed
855 * flag is set in regexec.c:S_regtry
857 SvFLAGS(resv) &= ~SVf_BREAK;
859 else if(SvREPADTMP(resv)) {
860 SvREPADTMP_off(resv);
862 else if(SvIOKp(resv)) {
863 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
868 SvREFCNT_dec(PL_regex_padav);
869 PL_regex_padav = NULL;
873 SvREFCNT_dec((SV*) PL_stashcache);
874 PL_stashcache = NULL;
876 /* loosen bonds of global variables */
879 (void)PerlIO_close(PL_rsfp);
883 /* Filters for program text */
884 SvREFCNT_dec(PL_rsfp_filters);
885 PL_rsfp_filters = NULL;
888 Safefree(PL_splitstr);
893 PL_preprocess = FALSE;
899 PL_doswitches = FALSE;
900 PL_dowarn = G_WARN_OFF;
901 PL_doextract = FALSE;
902 PL_sawampersand = FALSE; /* must save all match strings */
905 Safefree(PL_inplace);
907 SvREFCNT_dec(PL_patchlevel);
910 SvREFCNT_dec(PL_e_script);
916 /* magical thingies */
918 SvREFCNT_dec(PL_ofs_sv); /* $, */
921 SvREFCNT_dec(PL_ors_sv); /* $\ */
924 SvREFCNT_dec(PL_rs); /* $/ */
927 Safefree(PL_osname); /* $^O */
930 SvREFCNT_dec(PL_statname);
934 /* defgv, aka *_ should be taken care of elsewhere */
936 /* clean up after study() */
937 SvREFCNT_dec(PL_lastscream);
938 PL_lastscream = NULL;
939 Safefree(PL_screamfirst);
941 Safefree(PL_screamnext);
945 Safefree(PL_efloatbuf);
949 /* startup and shutdown function lists */
950 SvREFCNT_dec(PL_beginav);
951 SvREFCNT_dec(PL_beginav_save);
952 SvREFCNT_dec(PL_endav);
953 SvREFCNT_dec(PL_checkav);
954 SvREFCNT_dec(PL_checkav_save);
955 SvREFCNT_dec(PL_unitcheckav);
956 SvREFCNT_dec(PL_unitcheckav_save);
957 SvREFCNT_dec(PL_initav);
959 PL_beginav_save = NULL;
962 PL_checkav_save = NULL;
963 PL_unitcheckav = NULL;
964 PL_unitcheckav_save = NULL;
967 /* shortcuts just get cleared */
976 PL_last_in_gv = NULL;
984 PL_DBassertion = NULL;
989 SvREFCNT_dec(PL_argvout_stack);
990 PL_argvout_stack = NULL;
992 SvREFCNT_dec(PL_modglobal);
994 SvREFCNT_dec(PL_preambleav);
995 PL_preambleav = NULL;
996 SvREFCNT_dec(PL_subname);
998 SvREFCNT_dec(PL_linestr);
1000 #ifdef PERL_USES_PL_PIDSTATUS
1001 SvREFCNT_dec(PL_pidstatus);
1002 PL_pidstatus = NULL;
1004 SvREFCNT_dec(PL_toptarget);
1005 PL_toptarget = NULL;
1006 SvREFCNT_dec(PL_bodytarget);
1007 PL_bodytarget = NULL;
1008 PL_formtarget = NULL;
1010 /* free locale stuff */
1011 #ifdef USE_LOCALE_COLLATE
1012 Safefree(PL_collation_name);
1013 PL_collation_name = NULL;
1016 #ifdef USE_LOCALE_NUMERIC
1017 Safefree(PL_numeric_name);
1018 PL_numeric_name = NULL;
1019 SvREFCNT_dec(PL_numeric_radix_sv);
1020 PL_numeric_radix_sv = NULL;
1023 /* clear utf8 character classes */
1024 SvREFCNT_dec(PL_utf8_alnum);
1025 SvREFCNT_dec(PL_utf8_alnumc);
1026 SvREFCNT_dec(PL_utf8_ascii);
1027 SvREFCNT_dec(PL_utf8_alpha);
1028 SvREFCNT_dec(PL_utf8_space);
1029 SvREFCNT_dec(PL_utf8_cntrl);
1030 SvREFCNT_dec(PL_utf8_graph);
1031 SvREFCNT_dec(PL_utf8_digit);
1032 SvREFCNT_dec(PL_utf8_upper);
1033 SvREFCNT_dec(PL_utf8_lower);
1034 SvREFCNT_dec(PL_utf8_print);
1035 SvREFCNT_dec(PL_utf8_punct);
1036 SvREFCNT_dec(PL_utf8_xdigit);
1037 SvREFCNT_dec(PL_utf8_mark);
1038 SvREFCNT_dec(PL_utf8_toupper);
1039 SvREFCNT_dec(PL_utf8_totitle);
1040 SvREFCNT_dec(PL_utf8_tolower);
1041 SvREFCNT_dec(PL_utf8_tofold);
1042 SvREFCNT_dec(PL_utf8_idstart);
1043 SvREFCNT_dec(PL_utf8_idcont);
1044 PL_utf8_alnum = NULL;
1045 PL_utf8_alnumc = NULL;
1046 PL_utf8_ascii = NULL;
1047 PL_utf8_alpha = NULL;
1048 PL_utf8_space = NULL;
1049 PL_utf8_cntrl = NULL;
1050 PL_utf8_graph = NULL;
1051 PL_utf8_digit = NULL;
1052 PL_utf8_upper = NULL;
1053 PL_utf8_lower = NULL;
1054 PL_utf8_print = NULL;
1055 PL_utf8_punct = NULL;
1056 PL_utf8_xdigit = NULL;
1057 PL_utf8_mark = NULL;
1058 PL_utf8_toupper = NULL;
1059 PL_utf8_totitle = NULL;
1060 PL_utf8_tolower = NULL;
1061 PL_utf8_tofold = NULL;
1062 PL_utf8_idstart = NULL;
1063 PL_utf8_idcont = NULL;
1065 if (!specialWARN(PL_compiling.cop_warnings))
1066 PerlMemShared_free(PL_compiling.cop_warnings);
1067 PL_compiling.cop_warnings = NULL;
1068 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1069 PL_compiling.cop_hints_hash = NULL;
1070 CopFILE_free(&PL_compiling);
1071 CopSTASH_free(&PL_compiling);
1073 /* Prepare to destruct main symbol table. */
1078 SvREFCNT_dec(PL_curstname);
1079 PL_curstname = NULL;
1081 /* clear queued errors */
1082 SvREFCNT_dec(PL_errors);
1086 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1087 if (PL_scopestack_ix != 0)
1088 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1089 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1090 (long)PL_scopestack_ix);
1091 if (PL_savestack_ix != 0)
1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1093 "Unbalanced saves: %ld more saves than restores\n",
1094 (long)PL_savestack_ix);
1095 if (PL_tmps_floor != -1)
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1097 (long)PL_tmps_floor + 1);
1098 if (cxstack_ix != -1)
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1100 (long)cxstack_ix + 1);
1103 /* Now absolutely destruct everything, somehow or other, loops or no. */
1104 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1105 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1107 /* the 2 is for PL_fdpid and PL_strtab */
1108 while (PL_sv_count > 2 && sv_clean_all())
1111 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1112 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1113 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1114 SvFLAGS(PL_strtab) |= SVt_PVHV;
1116 AvREAL_off(PL_fdpid); /* no surviving entries */
1117 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1120 #ifdef HAVE_INTERP_INTERN
1124 /* Destruct the global string table. */
1126 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1127 * so that sv_free() won't fail on them.
1128 * Now that the global string table is using a single hunk of memory
1129 * for both HE and HEK, we either need to explicitly unshare it the
1130 * correct way, or actually free things here.
1133 const I32 max = HvMAX(PL_strtab);
1134 HE * const * const array = HvARRAY(PL_strtab);
1135 HE *hent = array[0];
1138 if (hent && ckWARN_d(WARN_INTERNAL)) {
1139 HE * const next = HeNEXT(hent);
1140 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1141 "Unbalanced string table refcount: (%ld) for \"%s\"",
1142 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1149 hent = array[riter];
1154 HvARRAY(PL_strtab) = 0;
1155 HvTOTALKEYS(PL_strtab) = 0;
1156 HvFILL(PL_strtab) = 0;
1158 SvREFCNT_dec(PL_strtab);
1161 /* free the pointer tables used for cloning */
1162 ptr_table_free(PL_ptr_table);
1163 PL_ptr_table = (PTR_TBL_t*)NULL;
1166 /* free special SVs */
1168 SvREFCNT(&PL_sv_yes) = 0;
1169 sv_clear(&PL_sv_yes);
1170 SvANY(&PL_sv_yes) = NULL;
1171 SvFLAGS(&PL_sv_yes) = 0;
1173 SvREFCNT(&PL_sv_no) = 0;
1174 sv_clear(&PL_sv_no);
1175 SvANY(&PL_sv_no) = NULL;
1176 SvFLAGS(&PL_sv_no) = 0;
1180 for (i=0; i<=2; i++) {
1181 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1182 sv_clear(PERL_DEBUG_PAD(i));
1183 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1184 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1188 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1189 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1191 #ifdef DEBUG_LEAKING_SCALARS
1192 if (PL_sv_count != 0) {
1197 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1198 svend = &sva[SvREFCNT(sva)];
1199 for (sv = sva + 1; sv < svend; ++sv) {
1200 if (SvTYPE(sv) != SVTYPEMASK) {
1201 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1203 " refcnt=%"UVuf pTHX__FORMAT "\n"
1204 "\tallocated at %s:%d %s %s%s\n",
1205 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1206 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1208 sv->sv_debug_inpad ? "for" : "by",
1209 sv->sv_debug_optype ?
1210 PL_op_name[sv->sv_debug_optype]: "(none)",
1211 sv->sv_debug_cloned ? " (cloned)" : ""
1213 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1214 Perl_dump_sv_child(aTHX_ sv);
1220 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1224 /* Wait for up to 4 seconds for child to terminate.
1225 This seems to be the least effort way of timing out on reaping
1227 struct timeval waitfor = {4, 0};
1228 int sock = PL_dumper_fd;
1232 FD_SET(sock, &rset);
1233 select(sock + 1, &rset, NULL, NULL, &waitfor);
1234 waitpid(child, &status, WNOHANG);
1242 #if defined(PERLIO_LAYERS)
1243 /* No more IO - including error messages ! */
1244 PerlIO_cleanup(aTHX);
1247 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1248 as currently layers use it rather than NULL as a marker
1249 for no arg - and will try and SvREFCNT_dec it.
1251 SvREFCNT(&PL_sv_undef) = 0;
1252 SvREADONLY_off(&PL_sv_undef);
1254 Safefree(PL_origfilename);
1255 PL_origfilename = NULL;
1256 Safefree(PL_reg_start_tmp);
1257 PL_reg_start_tmp = (char**)NULL;
1258 PL_reg_start_tmpl = 0;
1259 Safefree(PL_reg_curpm);
1260 Safefree(PL_reg_poscache);
1261 free_tied_hv_pool();
1262 Safefree(PL_op_mask);
1263 Safefree(PL_psig_ptr);
1264 PL_psig_ptr = (SV**)NULL;
1265 Safefree(PL_psig_name);
1266 PL_psig_name = (SV**)NULL;
1267 Safefree(PL_bitcount);
1269 Safefree(PL_psig_pend);
1270 PL_psig_pend = (int*)NULL;
1273 PL_tainting = FALSE;
1274 PL_taint_warn = FALSE;
1275 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1278 DEBUG_P(debprofdump());
1280 #ifdef USE_REENTRANT_API
1281 Perl_reentrant_free(aTHX);
1286 while (PL_regmatch_slab) {
1287 regmatch_slab *s = PL_regmatch_slab;
1288 PL_regmatch_slab = PL_regmatch_slab->next;
1292 /* As the absolutely last thing, free the non-arena SV for mess() */
1295 /* we know that type == SVt_PVMG */
1297 /* it could have accumulated taint magic */
1300 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1301 moremagic = mg->mg_moremagic;
1302 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1304 Safefree(mg->mg_ptr);
1308 /* we know that type >= SVt_PV */
1309 SvPV_free(PL_mess_sv);
1310 Safefree(SvANY(PL_mess_sv));
1311 Safefree(PL_mess_sv);
1318 =for apidoc perl_free
1320 Releases a Perl interpreter. See L<perlembed>.
1328 #ifdef PERL_TRACK_MEMPOOL
1331 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1332 * value as we're probably hunting memory leaks then
1334 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1335 if (!s || atoi(s) == 0) {
1336 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1337 thread at thread exit. */
1338 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1339 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1344 #if defined(WIN32) || defined(NETWARE)
1345 # if defined(PERL_IMPLICIT_SYS)
1348 void *host = nw_internal_host;
1350 void *host = w32_internal_host;
1352 PerlMem_free(aTHXx);
1354 nw_delete_internal_host(host);
1356 win32_delete_internal_host(host);
1360 PerlMem_free(aTHXx);
1363 PerlMem_free(aTHXx);
1367 #if defined(USE_ITHREADS)
1368 /* provide destructors to clean up the thread key when libperl is unloaded */
1369 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1371 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1372 #pragma fini "perl_fini"
1373 #elif defined(__sun) && !defined(__GNUC__)
1374 #pragma fini (perl_fini)
1378 #if defined(__GNUC__)
1379 __attribute__((destructor))
1389 #endif /* THREADS */
1392 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1395 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1396 PL_exitlist[PL_exitlistlen].fn = fn;
1397 PL_exitlist[PL_exitlistlen].ptr = ptr;
1401 #ifdef HAS_PROCSELFEXE
1402 /* This is a function so that we don't hold on to MAXPATHLEN
1403 bytes of stack longer than necessary
1406 S_procself_val(pTHX_ SV *sv, const char *arg0)
1408 char buf[MAXPATHLEN];
1409 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1411 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1412 includes a spurious NUL which will cause $^X to fail in system
1413 or backticks (this will prevent extensions from being built and
1414 many tests from working). readlink is not meant to add a NUL.
1415 Normal readlink works fine.
1417 if (len > 0 && buf[len-1] == '\0') {
1421 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1422 returning the text "unknown" from the readlink rather than the path
1423 to the executable (or returning an error from the readlink). Any valid
1424 path has a '/' in it somewhere, so use that to validate the result.
1425 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1427 if (len > 0 && memchr(buf, '/', len)) {
1428 sv_setpvn(sv,buf,len);
1434 #endif /* HAS_PROCSELFEXE */
1437 S_set_caret_X(pTHX) {
1439 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1441 #ifdef HAS_PROCSELFEXE
1442 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1445 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1447 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1454 =for apidoc perl_parse
1456 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1462 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1469 PERL_UNUSED_ARG(my_perl);
1471 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1474 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1475 setuid perl scripts securely.\n");
1476 #endif /* IAMSUID */
1479 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1480 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1481 * This MUST be done before any hash stores or fetches take place.
1482 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1483 * yourself, it is your responsibility to provide a good random seed!
1484 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1485 if (!PL_rehash_seed_set)
1486 PL_rehash_seed = get_hash_seed();
1488 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1490 if (s && (atoi(s) == 1))
1491 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1493 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1498 if (PL_origalen != 0) {
1499 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1502 /* Set PL_origalen be the sum of the contiguous argv[]
1503 * elements plus the size of the env in case that it is
1504 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1505 * as the maximum modifiable length of $0. In the worst case
1506 * the area we are able to modify is limited to the size of
1507 * the original argv[0]. (See below for 'contiguous', though.)
1509 const char *s = NULL;
1512 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1513 /* Do the mask check only if the args seem like aligned. */
1515 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1517 /* See if all the arguments are contiguous in memory. Note
1518 * that 'contiguous' is a loose term because some platforms
1519 * align the argv[] and the envp[]. If the arguments look
1520 * like non-aligned, assume that they are 'strictly' or
1521 * 'traditionally' contiguous. If the arguments look like
1522 * aligned, we just check that they are within aligned
1523 * PTRSIZE bytes. As long as no system has something bizarre
1524 * like the argv[] interleaved with some other data, we are
1525 * fine. (Did I just evoke Murphy's Law?) --jhi */
1526 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1528 for (i = 1; i < PL_origargc; i++) {
1529 if ((PL_origargv[i] == s + 1
1531 || PL_origargv[i] == s + 2
1536 (PL_origargv[i] > s &&
1538 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1548 /* Can we grab env area too to be used as the area for $0? */
1549 if (s && PL_origenviron) {
1550 if ((PL_origenviron[0] == s + 1)
1553 (PL_origenviron[0] > s &&
1554 PL_origenviron[0] <=
1555 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1558 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1559 s = PL_origenviron[0];
1562 my_setenv("NoNe SuCh", NULL);
1563 /* Force copy of environment. */
1564 for (i = 1; PL_origenviron[i]; i++) {
1565 if (PL_origenviron[i] == s + 1
1568 (PL_origenviron[i] > s &&
1569 PL_origenviron[i] <=
1570 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1573 s = PL_origenviron[i];
1581 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1586 /* Come here if running an undumped a.out. */
1588 PL_origfilename = savepv(argv[0]);
1589 PL_do_undump = FALSE;
1590 cxstack_ix = -1; /* start label stack again */
1592 assert (!PL_tainted);
1594 S_set_caret_X(aTHX);
1596 init_postdump_symbols(argc,argv,env);
1601 op_free(PL_main_root);
1602 PL_main_root = NULL;
1604 PL_main_start = NULL;
1605 SvREFCNT_dec(PL_main_cv);
1609 oldscope = PL_scopestack_ix;
1610 PL_dowarn = G_WARN_OFF;
1615 parse_body(env,xsinit);
1617 call_list(oldscope, PL_unitcheckav);
1619 call_list(oldscope, PL_checkav);
1626 /* my_exit() was called */
1627 while (PL_scopestack_ix > oldscope)
1630 PL_curstash = PL_defstash;
1632 call_list(oldscope, PL_unitcheckav);
1634 call_list(oldscope, PL_checkav);
1638 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1647 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1650 int argc = PL_origargc;
1651 char **argv = PL_origargv;
1652 const char *scriptname = NULL;
1653 VOL bool dosearch = FALSE;
1654 const char *validarg = "";
1656 register char *s, c;
1657 const char *cddir = NULL;
1658 #ifdef USE_SITECUSTOMIZE
1659 bool minus_f = FALSE;
1662 sv_setpvn(PL_linestr,"",0);
1663 sv = newSVpvs(""); /* first used for -I flags */
1667 for (argc--,argv++; argc > 0; argc--,argv++) {
1668 if (argv[0][0] != '-' || !argv[0][1])
1672 validarg = " PHOOEY ";
1676 * Can we rely on the kernel to start scripts with argv[1] set to
1677 * contain all #! line switches (the whole line)? (argv[0] is set to
1678 * the interpreter name, argv[2] to the script name; argv[3] and
1679 * above may contain other arguments.)
1686 #ifndef PERL_STRICT_CR
1711 if ((s = moreswitches(s)))
1716 CHECK_MALLOC_TOO_LATE_FOR('t');
1717 if( !PL_tainting ) {
1718 PL_taint_warn = TRUE;
1724 CHECK_MALLOC_TOO_LATE_FOR('T');
1726 PL_taint_warn = FALSE;
1734 #ifdef MACOS_TRADITIONAL
1735 /* ignore -e for Dev:Pseudo argument */
1736 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1739 forbid_setid('e', -1);
1741 PL_e_script = newSVpvs("");
1742 filter_add(read_e_script, NULL);
1745 sv_catpv(PL_e_script, s);
1747 sv_catpv(PL_e_script, argv[1]);
1751 Perl_croak(aTHX_ "No code specified for -%c", c);
1752 sv_catpvs(PL_e_script, "\n");
1756 #ifdef USE_SITECUSTOMIZE
1762 case 'I': /* -I handled both here and in moreswitches() */
1763 forbid_setid('I', -1);
1764 if (!*++s && (s=argv[1]) != NULL) {
1768 STRLEN len = strlen(s);
1769 const char * const p = savepvn(s, len);
1770 incpush(p, TRUE, TRUE, FALSE, FALSE);
1771 sv_catpvs(sv, "-I");
1772 sv_catpvn(sv, p, len);
1777 Perl_croak(aTHX_ "No directory specified for -I");
1780 forbid_setid('P', -1);
1781 PL_preprocess = TRUE;
1785 forbid_setid('S', -1);
1794 PL_preambleav = newAV();
1795 av_push(PL_preambleav,
1796 newSVpvs("use Config;"));
1800 opts_prog = newSVpvs("print Config::myconfig(),");
1802 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1804 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1806 opts = SvCUR(opts_prog);
1808 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1812 # ifdef DEBUG_LEAKING_SCALARS
1813 " DEBUG_LEAKING_SCALARS"
1815 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1816 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1818 # ifdef FAKE_THREADS
1821 # ifdef MULTIPLICITY
1830 # ifdef PERL_DONT_CREATE_GVSV
1831 " PERL_DONT_CREATE_GVSV"
1833 # ifdef PERL_GLOBAL_STRUCT
1834 " PERL_GLOBAL_STRUCT"
1836 # ifdef PERL_IMPLICIT_CONTEXT
1837 " PERL_IMPLICIT_CONTEXT"
1839 # ifdef PERL_IMPLICIT_SYS
1840 " PERL_IMPLICIT_SYS"
1845 # ifdef PERL_MALLOC_WRAP
1848 # ifdef PERL_NEED_APPCTX
1851 # ifdef PERL_NEED_TIMESBASE
1852 " PERL_NEED_TIMESBASE"
1854 # ifdef PERL_OLD_COPY_ON_WRITE
1855 " PERL_OLD_COPY_ON_WRITE"
1857 # ifdef PERL_TRACK_MEMPOOL
1858 " PERL_TRACK_MEMPOOL"
1860 # ifdef PERL_USE_SAFE_PUTENV
1861 " PERL_USE_SAFE_PUTENV"
1863 #ifdef PERL_USES_PL_PIDSTATUS
1864 " PERL_USES_PL_PIDSTATUS"
1866 # ifdef PL_OP_SLAB_ALLOC
1869 # ifdef THREADS_HAVE_PIDS
1870 " THREADS_HAVE_PIDS"
1872 # ifdef USE_64_BIT_ALL
1875 # ifdef USE_64_BIT_INT
1878 # ifdef USE_ITHREADS
1881 # ifdef USE_LARGE_FILES
1884 # ifdef USE_LONG_DOUBLE
1890 # ifdef USE_REENTRANT_API
1891 " USE_REENTRANT_API"
1896 # ifdef USE_SITECUSTOMIZE
1897 " USE_SITECUSTOMIZE"
1904 while (SvCUR(opts_prog) > opts+76) {
1905 /* find last space after "options: " and before col 76
1909 char * const pv = SvPV_nolen(opts_prog);
1910 const char c = pv[opts+76];
1912 space = strrchr(pv+opts+26, ' ');
1914 if (!space) break; /* "Can't happen" */
1916 /* break the line before that space */
1919 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1920 STR_WITH_LEN("\\n "));
1923 sv_catpvs(opts_prog,"\\n\",");
1925 #if defined(LOCAL_PATCH_COUNT)
1926 if (LOCAL_PATCH_COUNT > 0) {
1928 sv_catpvs(opts_prog,
1929 "\" Locally applied patches:\\n\",");
1930 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1931 if (PL_localpatches[i])
1932 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1933 0, PL_localpatches[i], 0);
1937 Perl_sv_catpvf(aTHX_ opts_prog,
1938 "\" Built under %s\\n\"",OSNAME);
1941 Perl_sv_catpvf(aTHX_ opts_prog,
1942 ",\" Compiled at %s %s\\n\"",__DATE__,
1945 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1949 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1950 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1951 "sort grep {/^PERL/} keys %ENV; ");
1953 sv_catpvs(opts_prog,
1954 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1956 sv_catpvs(opts_prog,
1957 "print \" \\%ENV:\\n @env\\n\" if @env;"
1958 "print \" \\@INC:\\n @INC\\n\";");
1962 opts_prog = Perl_newSVpvf(aTHX_
1963 "Config::config_vars(qw%c%s%c)",
1967 av_push(PL_preambleav, opts_prog);
1968 /* don't look for script or read stdin */
1969 scriptname = BIT_BUCKET;
1973 PL_doextract = TRUE;
1981 if (!*++s || isSPACE(*s)) {
1985 /* catch use of gnu style long options */
1986 if (strEQ(s, "version")) {
1990 if (strEQ(s, "help")) {
1997 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2003 #ifndef SECURE_INTERNAL_GETENV
2006 (s = PerlEnv_getenv("PERL5OPT")))
2008 const char *popt = s;
2011 if (*s == '-' && *(s+1) == 'T') {
2012 CHECK_MALLOC_TOO_LATE_FOR('T');
2014 PL_taint_warn = FALSE;
2017 char *popt_copy = NULL;
2030 if (!strchr("CDIMUdmtwA", *s))
2031 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2035 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2036 s = popt_copy + (s - popt);
2037 d = popt_copy + (d - popt);
2044 if( !PL_tainting ) {
2045 PL_taint_warn = TRUE;
2055 #ifdef USE_SITECUSTOMIZE
2058 PL_preambleav = newAV();
2059 av_unshift(PL_preambleav, 1);
2060 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2064 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2065 PL_compiling.cop_warnings
2066 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
2070 scriptname = argv[0];
2073 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2075 else if (scriptname == NULL) {
2077 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2083 /* Set $^X early so that it can be used for relocatable paths in @INC */
2084 assert (!PL_tainted);
2086 S_set_caret_X(aTHX);
2093 = open_script(scriptname, dosearch, sv, &suidscript);
2095 validate_suid(validarg, scriptname, fdscript, suidscript);
2098 # if defined(SIGCHLD) || defined(SIGCLD)
2101 # define SIGCHLD SIGCLD
2103 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2104 if (sigstate == (Sighandler_t) SIG_IGN) {
2105 if (ckWARN(WARN_SIGNAL))
2106 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2107 "Can't ignore signal CHLD, forcing to default");
2108 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2115 #ifdef MACOS_TRADITIONAL
2116 || gMacPerl_AlwaysExtract
2120 /* This will croak if suidscript is >= 0, as -x cannot be used with
2122 forbid_setid('x', suidscript);
2123 /* Hence you can't get here if suidscript >= 0 */
2126 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2127 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2131 PL_main_cv = PL_compcv = (CV*)newSV(0);
2132 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2133 CvUNIQUE_on(PL_compcv);
2135 CvPADLIST(PL_compcv) = pad_new(0);
2138 boot_core_UNIVERSAL();
2139 boot_core_xsutils();
2142 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2144 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2150 # ifdef HAS_SOCKS5_INIT
2151 socks5_init(argv[0]);
2157 init_predump_symbols();
2158 /* init_postdump_symbols not currently designed to be called */
2159 /* more than once (ENV isn't cleared first, for example) */
2160 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2162 init_postdump_symbols(argc,argv,env);
2164 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2165 * or explicitly in some platforms.
2166 * locale.c:Perl_init_i18nl10n() if the environment
2167 * look like the user wants to use UTF-8. */
2168 #if defined(__SYMBIAN32__)
2169 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2172 /* Requires init_predump_symbols(). */
2173 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2178 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2179 * and the default open disciplines. */
2180 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2181 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2183 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2184 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2185 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2187 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2188 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2189 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2191 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2192 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2193 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2195 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2196 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2199 sv_setpvn(sv, ":utf8\0:utf8", 11);
2201 sv_setpvn(sv, ":utf8\0", 6);
2204 sv_setpvn(sv, "\0:utf8", 6);
2210 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2211 if (strEQ(s, "unsafe"))
2212 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2213 else if (strEQ(s, "safe"))
2214 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2216 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2220 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2224 PL_xmlfp = PerlIO_stdout();
2226 PL_xmlfp = PerlIO_open(s, "w");
2228 Perl_croak(aTHX_ "Can't open %s", s);
2230 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2232 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2233 PL_madskills = atoi(s);
2234 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2240 /* now parse the script */
2242 SETERRNO(0,SS_NORMAL);
2244 #ifdef MACOS_TRADITIONAL
2245 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2247 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2249 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2250 MacPerl_MPWFileName(PL_origfilename));
2254 if (yyparse() || PL_error_count) {
2256 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2258 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2263 CopLINE_set(PL_curcop, 0);
2264 PL_curstash = PL_defstash;
2265 PL_preprocess = FALSE;
2267 SvREFCNT_dec(PL_e_script);
2275 SAVECOPFILE(PL_curcop);
2276 SAVECOPLINE(PL_curcop);
2277 gv_check(PL_defstash);
2284 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2285 dump_mstats("after compilation:");
2294 =for apidoc perl_run
2296 Tells a Perl interpreter to run. See L<perlembed>.
2309 PERL_UNUSED_ARG(my_perl);
2311 oldscope = PL_scopestack_ix;
2319 cxstack_ix = -1; /* start context stack again */
2321 case 0: /* normal completion */
2325 case 2: /* my_exit() */
2326 while (PL_scopestack_ix > oldscope)
2329 PL_curstash = PL_defstash;
2330 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2331 PL_endav && !PL_minus_c)
2332 call_list(oldscope, PL_endav);
2334 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2335 dump_mstats("after execution: ");
2341 POPSTACK_TO(PL_mainstack);
2344 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2356 S_run_body(pTHX_ I32 oldscope)
2359 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2360 PL_sawampersand ? "Enabling" : "Omitting"));
2362 if (!PL_restartop) {
2366 exit(0); /* less likely to core dump than my_exit(0) */
2369 DEBUG_x(dump_all());
2372 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2374 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2378 #ifdef MACOS_TRADITIONAL
2379 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2380 (gMacPerl_ErrorFormat ? "# " : ""),
2381 MacPerl_MPWFileName(PL_origfilename));
2383 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2387 if (PERLDB_SINGLE && PL_DBsingle)
2388 sv_setiv(PL_DBsingle, 1);
2390 call_list(oldscope, PL_initav);
2396 PL_op = PL_restartop;
2400 else if (PL_main_start) {
2401 CvDEPTH(PL_main_cv) = 1;
2402 PL_op = PL_main_start;
2410 =head1 SV Manipulation Functions
2412 =for apidoc p||get_sv
2414 Returns the SV of the specified Perl scalar. If C<create> is set and the
2415 Perl variable does not exist then it will be created. If C<create> is not
2416 set and the variable does not exist then NULL is returned.
2422 Perl_get_sv(pTHX_ const char *name, I32 create)
2425 gv = gv_fetchpv(name, create, SVt_PV);
2432 =head1 Array Manipulation Functions
2434 =for apidoc p||get_av
2436 Returns the AV of the specified Perl array. If C<create> is set and the
2437 Perl variable does not exist then it will be created. If C<create> is not
2438 set and the variable does not exist then NULL is returned.
2444 Perl_get_av(pTHX_ const char *name, I32 create)
2446 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2455 =head1 Hash Manipulation Functions
2457 =for apidoc p||get_hv
2459 Returns the HV of the specified Perl hash. If C<create> is set and the
2460 Perl variable does not exist then it will be created. If C<create> is not
2461 set and the variable does not exist then NULL is returned.
2467 Perl_get_hv(pTHX_ const char *name, I32 create)
2469 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2478 =head1 CV Manipulation Functions
2480 =for apidoc p||get_cv
2482 Returns the CV of the specified Perl subroutine. If C<create> is set and
2483 the Perl subroutine does not exist then it will be declared (which has the
2484 same effect as saying C<sub name;>). If C<create> is not set and the
2485 subroutine does not exist then NULL is returned.
2491 Perl_get_cv(pTHX_ const char *name, I32 create)
2493 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2494 /* XXX unsafe for threads if eval_owner isn't held */
2495 /* XXX this is probably not what they think they're getting.
2496 * It has the same effect as "sub name;", i.e. just a forward
2498 if (create && !GvCVu(gv))
2499 return newSUB(start_subparse(FALSE, 0),
2500 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2507 /* Be sure to refetch the stack pointer after calling these routines. */
2511 =head1 Callback Functions
2513 =for apidoc p||call_argv
2515 Performs a callback to the specified Perl sub. See L<perlcall>.
2521 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2523 /* See G_* flags in cop.h */
2524 /* null terminated arg list */
2532 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2537 return call_pv(sub_name, flags);
2541 =for apidoc p||call_pv
2543 Performs a callback to the specified Perl sub. See L<perlcall>.
2549 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2550 /* name of the subroutine */
2551 /* See G_* flags in cop.h */
2553 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2557 =for apidoc p||call_method
2559 Performs a callback to the specified Perl method. The blessed object must
2560 be on the stack. See L<perlcall>.
2566 Perl_call_method(pTHX_ const char *methname, I32 flags)
2567 /* name of the subroutine */
2568 /* See G_* flags in cop.h */
2570 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2573 /* May be called with any of a CV, a GV, or an SV containing the name. */
2575 =for apidoc p||call_sv
2577 Performs a callback to the Perl sub whose name is in the SV. See
2584 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2585 /* See G_* flags in cop.h */
2588 LOGOP myop; /* fake syntax tree node */
2593 bool oldcatch = CATCH_GET;
2595 OP* const oldop = PL_op;
2598 if (flags & G_DISCARD) {
2603 Zero(&myop, 1, LOGOP);
2604 myop.op_next = NULL;
2605 if (!(flags & G_NOARGS))
2606 myop.op_flags |= OPf_STACKED;
2607 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2608 (flags & G_ARRAY) ? OPf_WANT_LIST :
2613 EXTEND(PL_stack_sp, 1);
2614 *++PL_stack_sp = sv;
2616 oldscope = PL_scopestack_ix;
2618 if (PERLDB_SUB && PL_curstash != PL_debstash
2619 /* Handle first BEGIN of -d. */
2620 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2621 /* Try harder, since this may have been a sighandler, thus
2622 * curstash may be meaningless. */
2623 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2624 && !(flags & G_NODEBUG))
2625 PL_op->op_private |= OPpENTERSUB_DB;
2627 if (flags & G_METHOD) {
2628 Zero(&method_op, 1, UNOP);
2629 method_op.op_next = PL_op;
2630 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2631 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2632 PL_op = (OP*)&method_op;
2635 if (!(flags & G_EVAL)) {
2637 CALL_BODY_SUB((OP*)&myop);
2638 retval = PL_stack_sp - (PL_stack_base + oldmark);
2639 CATCH_SET(oldcatch);
2642 myop.op_other = (OP*)&myop;
2644 create_eval_scope(flags|G_FAKINGEVAL);
2652 CALL_BODY_SUB((OP*)&myop);
2653 retval = PL_stack_sp - (PL_stack_base + oldmark);
2654 if (!(flags & G_KEEPERR))
2655 sv_setpvn(ERRSV,"",0);
2661 /* my_exit() was called */
2662 PL_curstash = PL_defstash;
2665 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2666 Perl_croak(aTHX_ "Callback called exit");
2671 PL_op = PL_restartop;
2675 PL_stack_sp = PL_stack_base + oldmark;
2676 if (flags & G_ARRAY)
2680 *++PL_stack_sp = &PL_sv_undef;
2685 if (PL_scopestack_ix > oldscope)
2686 delete_eval_scope();
2690 if (flags & G_DISCARD) {
2691 PL_stack_sp = PL_stack_base + oldmark;
2700 /* Eval a string. The G_EVAL flag is always assumed. */
2703 =for apidoc p||eval_sv
2705 Tells Perl to C<eval> the string in the SV.
2711 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2713 /* See G_* flags in cop.h */
2717 UNOP myop; /* fake syntax tree node */
2718 VOL I32 oldmark = SP - PL_stack_base;
2721 OP* const oldop = PL_op;
2724 if (flags & G_DISCARD) {
2731 Zero(PL_op, 1, UNOP);
2732 EXTEND(PL_stack_sp, 1);
2733 *++PL_stack_sp = sv;
2735 if (!(flags & G_NOARGS))
2736 myop.op_flags = OPf_STACKED;
2737 myop.op_next = NULL;
2738 myop.op_type = OP_ENTEREVAL;
2739 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2740 (flags & G_ARRAY) ? OPf_WANT_LIST :
2742 if (flags & G_KEEPERR)
2743 myop.op_flags |= OPf_SPECIAL;
2745 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2746 * before a PUSHEVAL, which corrupts the stack after a croak */
2747 TAINT_PROPER("eval_sv()");
2753 CALL_BODY_EVAL((OP*)&myop);
2754 retval = PL_stack_sp - (PL_stack_base + oldmark);
2755 if (!(flags & G_KEEPERR))
2756 sv_setpvn(ERRSV,"",0);
2762 /* my_exit() was called */
2763 PL_curstash = PL_defstash;
2766 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2767 Perl_croak(aTHX_ "Callback called exit");
2772 PL_op = PL_restartop;
2776 PL_stack_sp = PL_stack_base + oldmark;
2777 if (flags & G_ARRAY)
2781 *++PL_stack_sp = &PL_sv_undef;
2787 if (flags & G_DISCARD) {
2788 PL_stack_sp = PL_stack_base + oldmark;
2798 =for apidoc p||eval_pv
2800 Tells Perl to C<eval> the given string and return an SV* result.
2806 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2810 SV* sv = newSVpv(p, 0);
2812 eval_sv(sv, G_SCALAR);
2819 if (croak_on_error && SvTRUE(ERRSV)) {
2820 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2826 /* Require a module. */
2829 =head1 Embedding Functions
2831 =for apidoc p||require_pv
2833 Tells Perl to C<require> the file named by the string argument. It is
2834 analogous to the Perl code C<eval "require '$file'">. It's even
2835 implemented that way; consider using load_module instead.
2840 Perl_require_pv(pTHX_ const char *pv)
2845 PUSHSTACKi(PERLSI_REQUIRE);
2847 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2848 eval_sv(sv_2mortal(sv), G_DISCARD);
2854 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2856 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2859 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2863 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2865 /* This message really ought to be max 23 lines.
2866 * Removed -h because the user already knows that option. Others? */
2868 static const char * const usage_msg[] = {
2869 "-0[octal] specify record separator (\\0, if no argument)",
2870 "-A[mod][=pattern] activate all/given assertions",
2871 "-a autosplit mode with -n or -p (splits $_ into @F)",
2872 "-C[number/list] enables the listed Unicode features",
2873 "-c check syntax only (runs BEGIN and CHECK blocks)",
2874 "-d[:debugger] run program under debugger",
2875 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2876 "-e program one line of program (several -e's allowed, omit programfile)",
2877 "-E program like -e, but enables all optional features",
2878 "-f don't do $sitelib/sitecustomize.pl at startup",
2879 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2880 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2881 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2882 "-l[octal] enable line ending processing, specifies line terminator",
2883 "-[mM][-]module execute \"use/no module...\" before executing program",
2884 "-n assume \"while (<>) { ... }\" loop around program",
2885 "-p assume loop like -n but print line also, like sed",
2886 "-P run program through C preprocessor before compilation",
2887 "-s enable rudimentary parsing for switches after programfile",
2888 "-S look for programfile using PATH environment variable",
2889 "-t enable tainting warnings",
2890 "-T enable tainting checks",
2891 "-u dump core after parsing program",
2892 "-U allow unsafe operations",
2893 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2894 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2895 "-w enable many useful warnings (RECOMMENDED)",
2896 "-W enable all warnings",
2897 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2898 "-X disable all warnings",
2902 const char * const *p = usage_msg;
2904 PerlIO_printf(PerlIO_stdout(),
2905 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2908 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2911 /* convert a string of -D options (or digits) into an int.
2912 * sets *s to point to the char after the options */
2916 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2918 static const char * const usage_msgd[] = {
2919 " Debugging flag values: (see also -d)",
2920 " p Tokenizing and parsing (with v, displays parse stack)",
2921 " s Stack snapshots (with v, displays all stacks)",
2922 " l Context (loop) stack processing",
2923 " t Trace execution",
2924 " o Method and overloading resolution",
2925 " c String/numeric conversions",
2926 " P Print profiling info, preprocessor command for -P, source file input state",
2927 " m Memory allocation",
2928 " f Format processing",
2929 " r Regular expression parsing and execution",
2930 " x Syntax tree dump",
2931 " u Tainting checks",
2932 " H Hash dump -- usurps values()",
2933 " X Scratchpad allocation",
2935 " S Thread synchronization",
2937 " R Include reference counts of dumped variables (eg when using -Ds)",
2938 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2939 " v Verbose: use in conjunction with other flags",
2941 " A Consistency checks on internal structures",
2942 " q quiet - currently only suppresses the 'EXECUTING' message",
2947 /* if adding extra options, remember to update DEBUG_MASK */
2948 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2950 for (; isALNUM(**s); (*s)++) {
2951 const char * const d = strchr(debopts,**s);
2953 i |= 1 << (d - debopts);
2954 else if (ckWARN_d(WARN_DEBUGGING))
2955 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2956 "invalid option -D%c, use -D'' to see choices\n", **s);
2959 else if (isDIGIT(**s)) {
2961 for (; isALNUM(**s); (*s)++) ;
2963 else if (givehelp) {
2964 const char *const *p = usage_msgd;
2965 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2968 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2969 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2970 "-Dp not implemented on this platform\n");
2976 /* This routine handles any switches that can be given during run */
2979 Perl_moreswitches(pTHX_ char *s)
2990 SvREFCNT_dec(PL_rs);
2991 if (s[1] == 'x' && s[2]) {
2992 const char *e = s+=2;
2998 flags = PERL_SCAN_SILENT_ILLDIGIT;
2999 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3000 if (s + numlen < e) {
3001 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3005 PL_rs = newSVpvs("");
3006 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3007 tmps = (U8*)SvPVX(PL_rs);
3008 uvchr_to_utf8(tmps, rschar);
3009 SvCUR_set(PL_rs, UNISKIP(rschar));
3014 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3015 if (rschar & ~((U8)~0))
3016 PL_rs = &PL_sv_undef;
3017 else if (!rschar && numlen >= 2)
3018 PL_rs = newSVpvs("");
3020 char ch = (char)rschar;
3021 PL_rs = newSVpvn(&ch, 1);
3024 sv_setsv(get_sv("/", TRUE), PL_rs);
3029 PL_unicode = parse_unicode_opts( (const char **)&s );
3030 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3036 while (*s && !isSPACE(*s)) ++s;
3037 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3048 forbid_setid('d', -1);
3051 /* -dt indicates to the debugger that threads will be used */
3052 if (*s == 't' && !isALNUM(s[1])) {
3054 my_setenv("PERL5DB_THREADED", "1");
3057 /* The following permits -d:Mod to accepts arguments following an =
3058 in the fashion that -MSome::Mod does. */
3059 if (*s == ':' || *s == '=') {
3061 SV * const sv = newSVpvs("use Devel::");
3063 /* We now allow -d:Module=Foo,Bar */
3064 while(isALNUM(*s) || *s==':') ++s;
3066 sv_catpv(sv, start);
3068 sv_catpvn(sv, start, s-start);
3069 /* Don't use NUL as q// delimiter here, this string goes in the
3071 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3074 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3077 PL_perldb = PERLDB_ALL;
3084 forbid_setid('D', -1);
3086 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3087 #else /* !DEBUGGING */
3088 if (ckWARN_d(WARN_DEBUGGING))
3089 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3090 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3091 for (s++; isALNUM(*s); s++) ;
3096 usage(PL_origargv[0]);
3099 Safefree(PL_inplace);
3100 #if defined(__CYGWIN__) /* do backup extension automagically */
3101 if (*(s+1) == '\0') {
3102 PL_inplace = savepvs(".bak");
3105 #endif /* __CYGWIN__ */
3107 const char * const start = ++s;
3108 while (*s && !isSPACE(*s))
3111 PL_inplace = savepvn(start, s - start);
3115 if (*s == '-') /* Additional switches on #! line. */
3119 case 'I': /* -I handled both here and in parse_body() */
3120 forbid_setid('I', -1);
3122 while (*s && isSPACE(*s))
3127 /* ignore trailing spaces (possibly followed by other switches) */
3129 for (e = p; *e && !isSPACE(*e); e++) ;
3133 } while (*p && *p != '-');
3134 e = savepvn(s, e-s);
3135 incpush(e, TRUE, TRUE, FALSE, FALSE);
3142 Perl_croak(aTHX_ "No directory specified for -I");
3148 SvREFCNT_dec(PL_ors_sv);
3154 PL_ors_sv = newSVpvs("\n");
3155 numlen = 3 + (*s == '0');
3156 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3160 if (RsPARA(PL_rs)) {
3161 PL_ors_sv = newSVpvs("\n\n");
3164 PL_ors_sv = newSVsv(PL_rs);
3169 forbid_setid('A', -1);
3171 PL_preambleav = newAV();
3174 char * const start = s;
3175 SV * const sv = newSVpvs("use assertions::activate");
3176 while(isALNUM(*s) || *s == ':') ++s;
3178 sv_catpvs(sv, "::");
3179 sv_catpvn(sv, start, s-start);
3182 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3185 else if (*s != '\0') {
3186 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3188 av_push(PL_preambleav, sv);
3192 forbid_setid('M', -1); /* XXX ? */
3195 forbid_setid('m', -1); /* XXX ? */
3199 const char *use = "use ";
3200 /* -M-foo == 'no foo' */
3201 /* Leading space on " no " is deliberate, to make both
3202 possibilities the same length. */
3203 if (*s == '-') { use = " no "; ++s; }
3204 sv = newSVpvn(use,4);
3206 /* We allow -M'Module qw(Foo Bar)' */
3207 while(isALNUM(*s) || *s==':') ++s;
3209 sv_catpv(sv, start);
3210 if (*(start-1) == 'm') {
3212 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3213 sv_catpvs( sv, " ()");
3217 Perl_croak(aTHX_ "Module name required with -%c option",
3219 sv_catpvn(sv, start, s-start);
3220 sv_catpvs(sv, " split(/,/,q");
3221 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3223 sv_catpvs(sv, "\0)");
3227 PL_preambleav = newAV();
3228 av_push(PL_preambleav, sv);
3231 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3242 forbid_setid('s', -1);
3243 PL_doswitches = TRUE;
3257 #ifdef MACOS_TRADITIONAL
3258 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3260 PL_do_undump = TRUE;
3268 if (!sv_derived_from(PL_patchlevel, "version"))
3269 upg_version(PL_patchlevel);
3271 PerlIO_printf(PerlIO_stdout(),
3272 Perl_form(aTHX_ "\nThis is perl, %"SVf
3273 #ifdef PERL_PATCHNUM
3274 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3277 SVfARG(vstringify(PL_patchlevel)),
3280 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3281 PerlIO_printf(PerlIO_stdout(),
3282 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3283 SVfARG(vstringify(PL_patchlevel))));
3284 PerlIO_printf(PerlIO_stdout(),
3285 Perl_form(aTHX_ " built under %s at %s %s\n",
3286 OSNAME, __DATE__, __TIME__));
3287 PerlIO_printf(PerlIO_stdout(),
3288 Perl_form(aTHX_ " OS Specific Release: %s\n",
3292 #if defined(LOCAL_PATCH_COUNT)
3293 if (LOCAL_PATCH_COUNT > 0)
3294 PerlIO_printf(PerlIO_stdout(),
3295 "\n(with %d registered patch%s, "
3296 "see perl -V for more detail)",
3298 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "\n\nCopyright 1987-2006, Larry Wall\n");
3303 #ifdef MACOS_TRADITIONAL
3304 PerlIO_printf(PerlIO_stdout(),
3305 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3306 "maintained by Chris Nandor\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3315 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3320 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "atariST series port, ++jrb bammi@cadence.com\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3335 PerlIO_printf(PerlIO_stdout(),
3336 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3343 PerlIO_printf(PerlIO_stdout(),
3344 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "MiNT port by Guido Flohr, 1997-1999\n");
3355 PerlIO_printf(PerlIO_stdout(),
3356 "EPOC port by Olaf Flebbe, 1999-2002\n");
3359 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3360 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3363 #ifdef __SYMBIAN32__
3364 PerlIO_printf(PerlIO_stdout(),
3365 "Symbian port by Nokia, 2004-2005\n");
3367 #ifdef BINARY_BUILD_NOTICE
3368 BINARY_BUILD_NOTICE;
3370 PerlIO_printf(PerlIO_stdout(),
3372 Perl may be copied only under the terms of either the Artistic License or the\n\
3373 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3374 Complete documentation for Perl, including FAQ lists, should be found on\n\
3375 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3376 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3379 if (! (PL_dowarn & G_WARN_ALL_MASK))
3380 PL_dowarn |= G_WARN_ON;
3384 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3385 if (!specialWARN(PL_compiling.cop_warnings))
3386 PerlMemShared_free(PL_compiling.cop_warnings);
3387 PL_compiling.cop_warnings = pWARN_ALL ;
3391 PL_dowarn = G_WARN_ALL_OFF;
3392 if (!specialWARN(PL_compiling.cop_warnings))
3393 PerlMemShared_free(PL_compiling.cop_warnings);
3394 PL_compiling.cop_warnings = pWARN_NONE ;
3399 if (s[1] == '-') /* Additional switches on #! line. */
3404 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3410 #ifdef ALTERNATE_SHEBANG
3411 case 'S': /* OS/2 needs -S on "extproc" line. */
3419 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3424 /* compliments of Tom Christiansen */
3426 /* unexec() can be found in the Gnu emacs distribution */
3427 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3430 Perl_my_unexec(pTHX)
3432 PERL_UNUSED_CONTEXT;
3434 SV * prog = newSVpv(BIN_EXP, 0);
3435 SV * file = newSVpv(PL_origfilename, 0);
3439 sv_catpvs(prog, "/perl");
3440 sv_catpvs(file, ".perldump");
3442 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3443 /* unexec prints msg to stderr in case of failure */
3444 PerlProc_exit(status);
3447 # include <lib$routines.h>
3448 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3449 # elif defined(WIN32) || defined(__CYGWIN__)
3450 Perl_croak(aTHX_ "dump is not supported");
3452 ABORT(); /* for use with undump */
3457 /* initialize curinterp */
3463 # define PERLVAR(var,type)
3464 # define PERLVARA(var,n,type)
3465 # if defined(PERL_IMPLICIT_CONTEXT)
3466 # define PERLVARI(var,type,init) aTHX->var = init;
3467 # define PERLVARIC(var,type,init) aTHX->var = init;
3469 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3470 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3472 # include "intrpvar.h"
3473 # include "thrdvar.h"
3479 # define PERLVAR(var,type)
3480 # define PERLVARA(var,n,type)
3481 # define PERLVARI(var,type,init) PL_##var = init;
3482 # define PERLVARIC(var,type,init) PL_##var = init;
3483 # include "intrpvar.h"
3484 # include "thrdvar.h"
3491 /* As these are inside a structure, PERLVARI isn't capable of initialising
3493 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3494 PL_reg_poscache = PL_reg_starttry = NULL;
3498 S_init_main_stash(pTHX)
3503 PL_curstash = PL_defstash = newHV();
3504 /* We know that the string "main" will be in the global shared string
3505 table, so it's a small saving to use it rather than allocate another
3507 PL_curstname = newSVpvs_share("main");
3508 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3509 /* If we hadn't caused another reference to "main" to be in the shared
3510 string table above, then it would be worth reordering these two,
3511 because otherwise all we do is delete "main" from it as a consequence
3512 of the SvREFCNT_dec, only to add it again with hv_name_set */
3513 SvREFCNT_dec(GvHV(gv));
3514 hv_name_set(PL_defstash, "main", 4, 0);
3515 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3517 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3519 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3520 GvMULTI_on(PL_incgv);
3521 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3522 GvMULTI_on(PL_hintgv);
3523 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3524 SvREFCNT_inc_simple(PL_defgv);
3525 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3526 SvREFCNT_inc_simple(PL_errgv);
3527 GvMULTI_on(PL_errgv);
3528 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3529 GvMULTI_on(PL_replgv);
3530 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3531 #ifdef PERL_DONT_CREATE_GVSV
3534 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3535 sv_setpvn(ERRSV, "", 0);
3536 PL_curstash = PL_defstash;
3537 CopSTASH_set(&PL_compiling, PL_defstash);
3538 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3539 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3541 /* We must init $/ before switches are processed. */
3542 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3546 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3552 const char *cpp_discard_flag;
3561 PL_origfilename = savepvs("-e");
3564 /* if find_script() returns, it returns a malloc()-ed value */
3565 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3567 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3568 const char *s = scriptname + 8;
3574 * Tell apart "normal" usage of fdscript, e.g.
3575 * with bash on FreeBSD:
3576 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3577 * from usage in suidperl.
3578 * Does any "normal" usage leave garbage after the number???
3579 * Is it a mistake to use a similar /dev/fd/ construct for
3584 * Be supersafe and do some sanity-checks.
3585 * Still, can we be sure we got the right thing?
3588 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3591 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3593 scriptname = savepv(s + 1);
3594 Safefree(PL_origfilename);
3595 PL_origfilename = (char *)scriptname;
3600 CopFILE_free(PL_curcop);
3601 CopFILE_set(PL_curcop, PL_origfilename);
3602 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3603 scriptname = (char *)"";
3604 if (fdscript >= 0) {
3605 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3606 # if defined(HAS_FCNTL) && defined(F_SETFD)
3608 /* ensure close-on-exec */
3609 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3614 Perl_croak(aTHX_ "sperl needs fd script\n"
3615 "You should not call sperl directly; do you need to "
3616 "change a #! line\nfrom sperl to perl?\n");
3619 * Do not open (or do other fancy stuff) while setuid.
3620 * Perl does the open, and hands script to suidperl on a fd;
3621 * suidperl only does some checks, sets up UIDs and re-execs
3622 * perl with that fd as it has always done.
3625 if (*suidscript != 1) {
3626 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3629 else if (PL_preprocess) {
3630 const char * const cpp_cfg = CPPSTDIN;
3631 SV * const cpp = newSVpvs("");
3632 SV * const cmd = newSV(0);
3634 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3635 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3636 if (strEQ(cpp_cfg, "cppstdin"))
3637 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3638 sv_catpv(cpp, cpp_cfg);
3641 sv_catpvs(sv, "-I");
3642 sv_catpv(sv,PRIVLIB_EXP);
3645 DEBUG_P(PerlIO_printf(Perl_debug_log,
3646 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3647 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3650 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3657 cpp_discard_flag = "";
3659 cpp_discard_flag = "-C";
3663 perl = os2_execname(aTHX);
3665 perl = PL_origargv[0];
3669 /* This strips off Perl comments which might interfere with
3670 the C pre-processor, including #!. #line directives are
3671 deliberately stripped to avoid confusion with Perl's version
3672 of #line. FWP played some golf with it so it will fit
3673 into VMS's 255 character buffer.
3676 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3678 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3680 Perl_sv_setpvf(aTHX_ cmd, "\
3681 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3682 perl, quote, code, quote, scriptname, SVfARG(cpp),
3683 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3685 PL_doextract = FALSE;
3687 DEBUG_P(PerlIO_printf(Perl_debug_log,
3688 "PL_preprocess: cmd=\"%s\"\n",
3691 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3695 else if (!*scriptname) {
3696 forbid_setid(0, *suidscript);
3697 PL_rsfp = PerlIO_stdin();
3700 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3701 # if defined(HAS_FCNTL) && defined(F_SETFD)
3703 /* ensure close-on-exec */
3704 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3707 #endif /* IAMSUID */
3709 /* PSz 16 Sep 03 Keep neat error message */
3711 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3713 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3714 CopFILE(PL_curcop), Strerror(errno));
3720 * I_SYSSTATVFS HAS_FSTATVFS
3722 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3723 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3724 * here so that metaconfig picks them up. */
3728 S_fd_on_nosuid_fs(pTHX_ int fd)
3731 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3732 * but is needed also on machines without setreuid.
3733 * Seems safe enough to run as root.
3735 int check_okay = 0; /* able to do all the required sys/libcalls */
3736 int on_nosuid = 0; /* the fd is on a nosuid fs */
3738 * Need to check noexec also: nosuid might not be set, the average
3739 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3741 int on_noexec = 0; /* the fd is on a noexec fs */
3744 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3745 * fstatvfs() is UNIX98.
3746 * fstatfs() is 4.3 BSD.
3747 * ustat()+getmnt() is pre-4.3 BSD.
3748 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3749 * an irrelevant filesystem while trying to reach the right one.
3752 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3754 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3755 defined(HAS_FSTATVFS)
3756 # define FD_ON_NOSUID_CHECK_OKAY
3757 struct statvfs stfs;
3759 check_okay = fstatvfs(fd, &stfs) == 0;
3760 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3762 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3763 on platforms where it is present. */
3764 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3766 # endif /* fstatvfs */
3768 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3769 defined(PERL_MOUNT_NOSUID) && \
3770 defined(PERL_MOUNT_NOEXEC) && \
3771 defined(HAS_FSTATFS) && \
3772 defined(HAS_STRUCT_STATFS) && \
3773 defined(HAS_STRUCT_STATFS_F_FLAGS)
3774 # define FD_ON_NOSUID_CHECK_OKAY
3777 check_okay = fstatfs(fd, &stfs) == 0;
3778 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3779 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3780 # endif /* fstatfs */
3782 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3783 defined(PERL_MOUNT_NOSUID) && \
3784 defined(PERL_MOUNT_NOEXEC) && \
3785 defined(HAS_FSTAT) && \
3786 defined(HAS_USTAT) && \
3787 defined(HAS_GETMNT) && \
3788 defined(HAS_STRUCT_FS_DATA) && \
3790 # define FD_ON_NOSUID_CHECK_OKAY
3793 if (fstat(fd, &fdst) == 0) {
3795 if (ustat(fdst.st_dev, &us) == 0) {
3797 /* NOSTAT_ONE here because we're not examining fields which
3798 * vary between that case and STAT_ONE. */
3799 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3800 size_t cmplen = sizeof(us.f_fname);
3801 if (sizeof(fsd.fd_req.path) < cmplen)
3802 cmplen = sizeof(fsd.fd_req.path);
3803 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3804 fdst.st_dev == fsd.fd_req.dev) {
3806 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3807 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3812 # endif /* fstat+ustat+getmnt */
3814 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3815 defined(HAS_GETMNTENT) && \
3816 defined(HAS_HASMNTOPT) && \
3817 defined(MNTOPT_NOSUID) && \
3818 defined(MNTOPT_NOEXEC)
3819 # define FD_ON_NOSUID_CHECK_OKAY
3820 FILE *mtab = fopen("/etc/mtab", "r");
3821 struct mntent *entry;
3824 if (mtab && (fstat(fd, &stb) == 0)) {
3825 while (entry = getmntent(mtab)) {
3826 if (stat(entry->mnt_dir, &fsb) == 0
3827 && fsb.st_dev == stb.st_dev)
3829 /* found the filesystem */
3831 if (hasmntopt(entry, MNTOPT_NOSUID))
3833 if (hasmntopt(entry, MNTOPT_NOEXEC))
3836 } /* A single fs may well fail its stat(). */
3841 # endif /* getmntent+hasmntopt */
3844 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3846 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3848 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3849 return ((!check_okay) || on_nosuid || on_noexec);
3851 #endif /* IAMSUID */
3854 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3855 int fdscript, int suidscript)
3860 #endif /* IAMSUID */
3862 /* do we need to emulate setuid on scripts? */
3864 /* This code is for those BSD systems that have setuid #! scripts disabled
3865 * in the kernel because of a security problem. Merely defining DOSUID
3866 * in perl will not fix that problem, but if you have disabled setuid
3867 * scripts in the kernel, this will attempt to emulate setuid and setgid
3868 * on scripts that have those now-otherwise-useless bits set. The setuid
3869 * root version must be called suidperl or sperlN.NNN. If regular perl
3870 * discovers that it has opened a setuid script, it calls suidperl with
3871 * the same argv that it had. If suidperl finds that the script it has
3872 * just opened is NOT setuid root, it sets the effective uid back to the
3873 * uid. We don't just make perl setuid root because that loses the
3874 * effective uid we had before invoking perl, if it was different from the
3877 * Description/comments above do not match current workings:
3878 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3879 * suidperl called with script open and name changed to /dev/fd/N/X;
3880 * suidperl croaks if script is not setuid;
3881 * making perl setuid would be a huge security risk (and yes, that
3882 * would lose any euid we might have had).
3884 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3885 * be defined in suidperl only. suidperl must be setuid root. The
3886 * Configure script will set this up for you if you want it.
3892 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3893 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3894 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3896 const char *linestr;
3900 if (fdscript < 0 || suidscript != 1)
3901 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3903 * Since the script is opened by perl, not suidperl, some of these
3904 * checks are superfluous. Leaving them in probably does not lower
3908 * Do checks even for systems with no HAS_SETREUID.
3909 * We used to swap, then re-swap UIDs with
3911 if (setreuid(PL_euid,PL_uid) < 0
3912 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3913 Perl_croak(aTHX_ "Can't swap uid and euid");
3916 if (setreuid(PL_uid,PL_euid) < 0
3917 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3918 Perl_croak(aTHX_ "Can't reswap uid and euid");
3922 /* On this access check to make sure the directories are readable,
3923 * there is actually a small window that the user could use to make
3924 * filename point to an accessible directory. So there is a faint
3925 * chance that someone could execute a setuid script down in a
3926 * non-accessible directory. I don't know what to do about that.
3927 * But I don't think it's too important. The manual lies when
3928 * it says access() is useful in setuid programs.
3930 * So, access() is pretty useless... but not harmful... do anyway.
3932 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3933 Perl_croak(aTHX_ "Can't access() script\n");
3936 /* If we can swap euid and uid, then we can determine access rights
3937 * with a simple stat of the file, and then compare device and
3938 * inode to make sure we did stat() on the same file we opened.
3939 * Then we just have to make sure he or she can execute it.
3942 * As the script is opened by perl, not suidperl, we do not need to
3943 * care much about access rights.
3945 * The 'script changed' check is needed, or we can get lied to
3946 * about $0 with e.g.
3947 * suidperl /dev/fd/4//bin/x 4<setuidscript
3948 * Without HAS_SETREUID, is it safe to stat() as root?
3950 * Are there any operating systems that pass /dev/fd/xxx for setuid
3951 * scripts, as suggested/described in perlsec(1)? Surely they do not
3952 * pass the script name as we do, so the "script changed" test would
3953 * fail for them... but we never get here with
3954 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3956 * This is one place where we must "lie" about return status: not
3957 * say if the stat() failed. We are doing this as root, and could
3958 * be tricked into reporting existence or not of files that the
3959 * "plain" user cannot even see.
3963 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3964 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3965 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3966 Perl_croak(aTHX_ "Setuid script changed\n");
3970 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3971 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3974 * We used to do this check as the "plain" user (after swapping
3975 * UIDs). But the check for nosuid and noexec filesystem is needed,
3976 * and should be done even without HAS_SETREUID. (Maybe those
3977 * operating systems do not have such mount options anyway...)
3978 * Seems safe enough to do as root.
3980 #if !defined(NO_NOSUID_CHECK)
3981 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3982 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3985 #endif /* IAMSUID */
3987 if (!S_ISREG(PL_statbuf.st_mode)) {
3988 Perl_croak(aTHX_ "Setuid script not plain file\n");
3990 if (PL_statbuf.st_mode & S_IWOTH)
3991 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3992 PL_doswitches = FALSE; /* -s is insecure in suid */
3993 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3994 CopLINE_inc(PL_curcop);
3995 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3996 Perl_croak(aTHX_ "No #! line");
3997 linestr = SvPV_nolen_const(PL_linestr);
3998 /* required even on Sys V */
3999 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4000 Perl_croak(aTHX_ "No #! line");
4004 /* Sanity check on line length */
4005 s_end = s + strlen(s);
4006 if (s_end == s || (s_end - s) > 4000)
4007 Perl_croak(aTHX_ "Very long #! line");
4008 /* Allow more than a single space after #! */
4009 while (isSPACE(*s)) s++;
4010 /* Sanity check on buffer end */
4011 while ((*s) && !isSPACE(*s)) s++;
4012 for (s2 = s; (s2 > linestr &&
4013 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4014 || s2[-1] == '-')); s2--) ;
4015 /* Sanity check on buffer start */
4016 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4017 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4018 Perl_croak(aTHX_ "Not a perl script");
4019 while (*s == ' ' || *s == '\t') s++;
4021 * #! arg must be what we saw above. They can invoke it by
4022 * mentioning suidperl explicitly, but they may not add any strange
4023 * arguments beyond what #! says if they do invoke suidperl that way.
4026 * The way validarg was set up, we rely on the kernel to start
4027 * scripts with argv[1] set to contain all #! line switches (the
4031 * Check that we got all the arguments listed in the #! line (not
4032 * just that there are no extraneous arguments). Might not matter
4033 * much, as switches from #! line seem to be acted upon (also), and
4034 * so may be checked and trapped in perl. But, security checks must
4035 * be done in suidperl and not deferred to perl. Note that suidperl
4036 * does not get around to parsing (and checking) the switches on
4037 * the #! line (but execs perl sooner).
4038 * Allow (require) a trailing newline (which may be of two
4039 * characters on some architectures?) (but no other trailing
4042 len = strlen(validarg);
4043 if (strEQ(validarg," PHOOEY ") ||
4044 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4045 !((s_end - s) == len+1
4046 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4047 Perl_croak(aTHX_ "Args must match #! line");
4051 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4052 PL_euid == PL_statbuf.st_uid)
4054 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4055 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4056 #endif /* IAMSUID */
4059 PL_euid) { /* oops, we're not the setuid root perl */
4061 * When root runs a setuid script, we do not go through the same
4062 * steps of execing sperl and then perl with fd scripts, but
4063 * simply set up UIDs within the same perl invocation; so do
4064 * not have the same checks (on options, whatever) that we have
4065 * for plain users. No problem really: would have to be a script
4066 * that does not actually work for plain users; and if root is
4067 * foolish and can be persuaded to run such an unsafe script, he
4068 * might run also non-setuid ones, and deserves what he gets.
4070 * Or, we might drop the PL_euid check above (and rely just on
4071 * fdscript to avoid loops), and do the execs
4077 * Pass fd script to suidperl.
4078 * Exec suidperl, substituting fd script for scriptname.
4079 * Pass script name as "subdir" of fd, which perl will grok;
4080 * in fact will use that to distinguish this from "normal"
4081 * usage, see comments above.
4083 PerlIO_rewind(PL_rsfp);
4084 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4085 /* PSz 27 Feb 04 Sanity checks on scriptname */
4086 if ((!scriptname) || (!*scriptname) ) {
4087 Perl_croak(aTHX_ "No setuid script name\n");
4089 if (*scriptname == '-') {
4090 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4091 /* Or we might confuse it with an option when replacing
4092 * name in argument list, below (though we do pointer, not
4093 * string, comparisons).
4096 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4097 if (!PL_origargv[which]) {
4098 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4100 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4101 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4102 #if defined(HAS_FCNTL) && defined(F_SETFD)
4103 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4106 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4107 (int)PERL_REVISION, (int)PERL_VERSION,
4108 (int)PERL_SUBVERSION), PL_origargv);
4110 #endif /* IAMSUID */
4111 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4114 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4116 * This seems back to front: we try HAS_SETEGID first; if not available
4117 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4118 * in the sense that we only want to set EGID; but are there any machines
4119 * with either of the latter, but not the former? Same with UID, later.
4122 (void)setegid(PL_statbuf.st_gid);
4125 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4127 #ifdef HAS_SETRESGID
4128 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4130 PerlProc_setgid(PL_statbuf.st_gid);
4134 if (PerlProc_getegid() != PL_statbuf.st_gid)
4135 Perl_croak(aTHX_ "Can't do setegid!\n");
4137 if (PL_statbuf.st_mode & S_ISUID) {
4138 if (PL_statbuf.st_uid != PL_euid)
4140 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4143 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4145 #ifdef HAS_SETRESUID
4146 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4148 PerlProc_setuid(PL_statbuf.st_uid);
4152 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4153 Perl_croak(aTHX_ "Can't do seteuid!\n");
4155 else if (PL_uid) { /* oops, mustn't run as root */
4157 (void)seteuid((Uid_t)PL_uid);
4160 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4162 #ifdef HAS_SETRESUID
4163 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4165 PerlProc_setuid((Uid_t)PL_uid);
4169 if (PerlProc_geteuid() != PL_uid)
4170 Perl_croak(aTHX_ "Can't do seteuid!\n");
4173 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4174 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4177 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4178 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4179 else if (fdscript < 0 || suidscript != 1)
4180 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4181 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4183 /* PSz 16 Sep 03 Keep neat error message */
4184 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4187 /* We absolutely must clear out any saved ids here, so we */
4188 /* exec the real perl, substituting fd script for scriptname. */
4189 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4191 * It might be thought that using setresgid and/or setresuid (changed to
4192 * set the saved IDs) above might obviate the need to exec, and we could
4193 * go on to "do the perl thing".
4195 * Is there such a thing as "saved GID", and is that set for setuid (but
4196 * not setgid) execution like suidperl? Without exec, it would not be
4197 * cleared for setuid (but not setgid) scripts (or might need a dummy
4200 * We need suidperl to do the exact same argument checking that perl
4201 * does. Thus it cannot be very small; while it could be significantly
4202 * smaller, it is safer (simpler?) to make it essentially the same
4203 * binary as perl (but they are not identical). - Maybe could defer that
4204 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4205 * but prefer to do thorough checks in suidperl itself. Such deferral
4206 * would make suidperl security rely on perl, a design no-no.
4208 * Setuid things should be short and simple, thus easy to understand and
4209 * verify. They should do their "own thing", without influence by
4210 * attackers. It may help if their internal execution flow is fixed,
4211 * regardless of platform: it may be best to exec anyway.
4213 * Suidperl should at least be conceptually simple: a wrapper only,
4214 * never to do any real perl. Maybe we should put
4216 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4218 * into the perly bits.
4220 PerlIO_rewind(PL_rsfp);
4221 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4223 * Keep original arguments: suidperl already has fd script.
4225 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4226 /* if (!PL_origargv[which]) { */
4227 /* errno = EPERM; */
4228 /* Perl_croak(aTHX_ "Permission denied\n"); */
4230 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4231 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4232 #if defined(HAS_FCNTL) && defined(F_SETFD)
4233 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4236 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4237 (int)PERL_REVISION, (int)PERL_VERSION,
4238 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4240 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4241 #endif /* IAMSUID */
4243 PERL_UNUSED_ARG(fdscript);
4244 PERL_UNUSED_ARG(suidscript);
4245 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4246 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4247 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4248 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4250 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4253 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4254 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4255 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4256 /* not set-id, must be wrapped */
4259 PERL_UNUSED_ARG(validarg);
4260 PERL_UNUSED_ARG(scriptname);
4264 S_find_beginning(pTHX)
4268 register const char *s2;
4269 #ifdef MACOS_TRADITIONAL
4273 /* skip forward in input to the real script? */
4275 #ifdef MACOS_TRADITIONAL
4276 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4278 while (PL_doextract || gMacPerl_AlwaysExtract) {
4279 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4280 if (!gMacPerl_AlwaysExtract)
4281 Perl_croak(aTHX_ "No Perl script found in input\n");
4283 if (PL_doextract) /* require explicit override ? */
4284 if (!OverrideExtract(PL_origfilename))
4285 Perl_croak(aTHX_ "User aborted script\n");
4287 PL_doextract = FALSE;
4289 /* Pater peccavi, file does not have #! */
4290 PerlIO_rewind(PL_rsfp);
4295 while (PL_doextract) {
4296 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4297 Perl_croak(aTHX_ "No Perl script found in input\n");
4300 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4301 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4302 PL_doextract = FALSE;
4303 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4305 while (*s == ' ' || *s == '\t') s++;
4307 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4308 || s2[-1] == '_') s2--;
4309 if (strnEQ(s2-4,"perl",4))
4310 while ((s = moreswitches(s)))
4313 #ifdef MACOS_TRADITIONAL
4314 /* We are always searching for the #!perl line in MacPerl,
4315 * so if we find it, still keep the line count correct
4316 * by counting lines we already skipped over
4318 for (; maclines > 0 ; maclines--)
4319 PerlIO_ungetc(PL_rsfp, '\n');
4323 /* gMacPerl_AlwaysExtract is false in MPW tool */
4324 } else if (gMacPerl_AlwaysExtract) {
4336 PL_uid = PerlProc_getuid();
4337 PL_euid = PerlProc_geteuid();
4338 PL_gid = PerlProc_getgid();
4339 PL_egid = PerlProc_getegid();
4341 PL_uid |= PL_gid << 16;
4342 PL_euid |= PL_egid << 16;
4344 /* Should not happen: */
4345 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4346 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4349 * Should go by suidscript, not uid!=euid: why disallow
4350 * system("ls") in scripts run from setuid things?
4351 * Or, is this run before we check arguments and set suidscript?
4352 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4353 * (We never have suidscript, can we be sure to have fdscript?)
4354 * Or must then go by UID checks? See comments in forbid_setid also.
4358 /* This is used very early in the lifetime of the program,
4359 * before even the options are parsed, so PL_tainting has
4360 * not been initialized properly. */
4362 Perl_doing_taint(int argc, char *argv[], char *envp[])
4364 #ifndef PERL_IMPLICIT_SYS
4365 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4366 * before we have an interpreter-- and the whole point of this
4367 * function is to be called at such an early stage. If you are on
4368 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4369 * "tainted because running with altered effective ids', you'll
4370 * have to add your own checks somewhere in here. The two most
4371 * known samples of 'implicitness' are Win32 and NetWare, neither
4372 * of which has much of concept of 'uids'. */
4373 int uid = PerlProc_getuid();
4374 int euid = PerlProc_geteuid();
4375 int gid = PerlProc_getgid();
4376 int egid = PerlProc_getegid();
4383 if (uid && (euid != uid || egid != gid))
4385 #endif /* !PERL_IMPLICIT_SYS */
4386 /* This is a really primitive check; environment gets ignored only
4387 * if -T are the first chars together; otherwise one gets
4388 * "Too late" message. */
4389 if ( argc > 1 && argv[1][0] == '-'
4390 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4395 /* Passing the flag as a single char rather than a string is a slight space
4396 optimisation. The only message that isn't /^-.$/ is
4397 "program input from stdin", which is substituted in place of '\0', which
4398 could never be a command line flag. */
4400 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4403 char string[3] = "-x";
4404 const char *message = "program input from stdin";
4411 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4412 if (PL_euid != PL_uid)
4413 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4414 if (PL_egid != PL_gid)
4415 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4416 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4418 * Checks for UID/GID above "wrong": why disallow
4419 * perl -e 'print "Hello\n"'
4420 * from within setuid things?? Simply drop them: replaced by
4421 * fdscript/suidscript and #ifdef IAMSUID checks below.
4423 * This may be too late for command-line switches. Will catch those on
4424 * the #! line, after finding the script name and setting up
4425 * fdscript/suidscript. Note that suidperl does not get around to
4426 * parsing (and checking) the switches on the #! line, but checks that
4427 * the two sets are identical.
4429 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4430 * instead, or would that be "too late"? (We never have suidscript, can
4431 * we be sure to have fdscript?)
4433 * Catch things with suidscript (in descendant of suidperl), even with
4434 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4435 * below; but I am paranoid.
4437 * Also see comments about root running a setuid script, elsewhere.
4439 if (suidscript >= 0)
4440 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4442 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4443 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4444 #endif /* IAMSUID */
4448 Perl_init_debugger(pTHX)
4451 HV * const ostash = PL_curstash;
4453 PL_curstash = PL_debstash;
4454 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4456 AvREAL_off(PL_dbargs);
4457 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4458 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4459 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4460 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4461 sv_setiv(PL_DBsingle, 0);
4462 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4463 sv_setiv(PL_DBtrace, 0);
4464 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4465 sv_setiv(PL_DBsignal, 0);
4466 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4467 sv_setiv(PL_DBassertion, 0);
4468 PL_curstash = ostash;
4471 #ifndef STRESS_REALLOC
4472 #define REASONABLE(size) (size)
4474 #define REASONABLE(size) (1) /* unreasonable */
4478 Perl_init_stacks(pTHX)
4481 /* start with 128-item stack and 8K cxstack */
4482 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4483 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4484 PL_curstackinfo->si_type = PERLSI_MAIN;
4485 PL_curstack = PL_curstackinfo->si_stack;
4486 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4488 PL_stack_base = AvARRAY(PL_curstack);
4489 PL_stack_sp = PL_stack_base;
4490 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4492 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4495 PL_tmps_max = REASONABLE(128);
4497 Newx(PL_markstack,REASONABLE(32),I32);
4498 PL_markstack_ptr = PL_markstack;
4499 PL_markstack_max = PL_markstack + REASONABLE(32);
4503 Newx(PL_scopestack,REASONABLE(32),I32);
4504 PL_scopestack_ix = 0;
4505 PL_scopestack_max = REASONABLE(32);
4507 Newx(PL_savestack,REASONABLE(128),ANY);
4508 PL_savestack_ix = 0;
4509 PL_savestack_max = REASONABLE(128);
4518 while (PL_curstackinfo->si_next)
4519 PL_curstackinfo = PL_curstackinfo->si_next;
4520 while (PL_curstackinfo) {
4521 PERL_SI *p = PL_curstackinfo->si_prev;
4522 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4523 Safefree(PL_curstackinfo->si_cxstack);
4524 Safefree(PL_curstackinfo);
4525 PL_curstackinfo = p;
4527 Safefree(PL_tmps_stack);
4528 Safefree(PL_markstack);
4529 Safefree(PL_scopestack);
4530 Safefree(PL_savestack);
4540 lex_start(PL_linestr);
4542 PL_subname = newSVpvs("main");
4546 S_init_predump_symbols(pTHX)
4552 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4553 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4554 GvMULTI_on(PL_stdingv);
4555 io = GvIOp(PL_stdingv);
4556 IoTYPE(io) = IoTYPE_RDONLY;
4557 IoIFP(io) = PerlIO_stdin();
4558 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4560 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4562 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4565 IoTYPE(io) = IoTYPE_WRONLY;
4566 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4568 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4570 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4572 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4573 GvMULTI_on(PL_stderrgv);
4574 io = GvIOp(PL_stderrgv);
4575 IoTYPE(io) = IoTYPE_WRONLY;
4576 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4577 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4579 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4581 PL_statname = newSV(0); /* last filename we did stat on */
4583 Safefree(PL_osname);
4584 PL_osname = savepv(OSNAME);
4588 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4591 argc--,argv++; /* skip name of script */
4592 if (PL_doswitches) {
4593 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4597 if (argv[0][1] == '-' && !argv[0][2]) {
4601 if ((s = strchr(argv[0], '='))) {
4602 const char *const start_name = argv[0] + 1;
4603 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4604 TRUE, SVt_PV)), s + 1);
4607 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4610 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4611 GvMULTI_on(PL_argvgv);
4612 (void)gv_AVadd(PL_argvgv);
4613 av_clear(GvAVn(PL_argvgv));
4614 for (; argc > 0; argc--,argv++) {
4615 SV * const sv = newSVpv(argv[0],0);
4616 av_push(GvAVn(PL_argvgv),sv);
4617 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4618 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4621 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4622 (void)sv_utf8_decode(sv);
4628 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4633 PL_toptarget = newSV(0);
4634 sv_upgrade(PL_toptarget, SVt_PVFM);
4635 sv_setpvn(PL_toptarget, "", 0);
4636 PL_bodytarget = newSV(0);
4637 sv_upgrade(PL_bodytarget, SVt_PVFM);
4638 sv_setpvn(PL_bodytarget, "", 0);
4639 PL_formtarget = PL_bodytarget;
4643 init_argv_symbols(argc,argv);
4645 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4646 #ifdef MACOS_TRADITIONAL
4647 /* $0 is not majick on a Mac */
4648 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4650 sv_setpv(GvSV(tmpgv),PL_origfilename);
4651 magicname("0", "0", 1);
4654 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4656 bool env_is_not_environ;
4657 GvMULTI_on(PL_envgv);
4658 hv = GvHVn(PL_envgv);
4659 hv_magic(hv, NULL, PERL_MAGIC_env);
4661 #ifdef USE_ENVIRON_ARRAY
4662 /* Note that if the supplied env parameter is actually a copy
4663 of the global environ then it may now point to free'd memory
4664 if the environment has been modified since. To avoid this
4665 problem we treat env==NULL as meaning 'use the default'
4669 env_is_not_environ = env != environ;
4670 if (env_is_not_environ
4671 # ifdef USE_ITHREADS
4672 && PL_curinterp == aTHX
4679 char** origenv = environ;
4682 for (; *env; env++) {
4683 if (!(s = strchr(*env,'=')) || s == *env)
4685 #if defined(MSDOS) && !defined(DJGPP)
4690 sv = newSVpv(s+1, 0);
4691 (void)hv_store(hv, *env, s - *env, sv, 0);
4692 if (env_is_not_environ)
4694 if (origenv != environ) {
4695 /* realloc has shifted us */
4696 env = (env - origenv) + environ;
4701 #endif /* USE_ENVIRON_ARRAY */
4702 #endif /* !PERL_MICRO */
4705 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4706 SvREADONLY_off(GvSV(tmpgv));
4707 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4708 SvREADONLY_on(GvSV(tmpgv));
4710 #ifdef THREADS_HAVE_PIDS
4711 PL_ppid = (IV)getppid();
4714 /* touch @F array to prevent spurious warnings 20020415 MJD */
4716 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4718 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4719 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4720 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4724 S_init_perllib(pTHX)
4730 s = PerlEnv_getenv("PERL5LIB");
4732 * It isn't possible to delete an environment variable with
4733 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4734 * case we treat PERL5LIB as undefined if it has a zero-length value.
4736 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4737 if (s && *s != '\0')
4741 incpush(s, TRUE, TRUE, TRUE, FALSE);
4743 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4745 /* Treat PERL5?LIB as a possible search list logical name -- the
4746 * "natural" VMS idiom for a Unix path string. We allow each
4747 * element to be a set of |-separated directories for compatibility.
4751 if (my_trnlnm("PERL5LIB",buf,0))
4752 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4754 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4758 /* Use the ~-expanded versions of APPLLIB (undocumented),
4759 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4762 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4766 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4768 #ifdef MACOS_TRADITIONAL
4771 SV * privdir = newSV(0);
4772 char * macperl = PerlEnv_getenv("MACPERL");
4777 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4778 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4779 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4780 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4781 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4782 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4784 SvREFCNT_dec(privdir);
4787 incpush(":", FALSE, FALSE, TRUE, FALSE);
4790 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4793 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4795 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4799 /* sitearch is always relative to sitelib on Windows for
4800 * DLL-based path intuition to work correctly */
4801 # if !defined(WIN32)
4802 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4808 /* this picks up sitearch as well */
4809 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4811 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4815 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4816 /* Search for version-specific dirs below here */
4817 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4820 #ifdef PERL_VENDORARCH_EXP
4821 /* vendorarch is always relative to vendorlib on Windows for
4822 * DLL-based path intuition to work correctly */
4823 # if !defined(WIN32)
4824 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4828 #ifdef PERL_VENDORLIB_EXP
4830 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4832 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4836 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4837 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4840 #ifdef PERL_OTHERLIBDIRS
4841 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4845 incpush(".", FALSE, FALSE, TRUE, FALSE);
4846 #endif /* MACOS_TRADITIONAL */
4849 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4850 # define PERLLIB_SEP ';'
4853 # define PERLLIB_SEP '|'
4855 # if defined(MACOS_TRADITIONAL)
4856 # define PERLLIB_SEP ','
4858 # define PERLLIB_SEP ':'
4862 #ifndef PERLLIB_MANGLE
4863 # define PERLLIB_MANGLE(s,n) (s)
4866 /* Push a directory onto @INC if it exists.
4867 Generate a new SV if we do this, to save needing to copy the SV we push
4870 S_incpush_if_exists(pTHX_ SV *dir)
4874 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4875 S_ISDIR(tmpstatbuf.st_mode)) {
4876 av_push(GvAVn(PL_incgv), dir);
4883 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4888 const char *p = dir;
4893 if (addsubdirs || addoldvers) {
4897 /* Break at all separators */
4899 SV *libdir = newSV(0);
4902 /* skip any consecutive separators */
4904 while ( *p == PERLLIB_SEP ) {
4905 /* Uncomment the next line for PATH semantics */
4906 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4911 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4912 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4917 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4918 p = NULL; /* break out */
4920 #ifdef MACOS_TRADITIONAL
4921 if (!strchr(SvPVX(libdir), ':')) {
4924 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4926 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4927 sv_catpvs(libdir, ":");
4930 /* Do the if() outside the #ifdef to avoid warnings about an unused
4933 #ifdef PERL_RELOCATABLE_INC
4935 * Relocatable include entries are marked with a leading .../
4938 * 0: Remove that leading ".../"
4939 * 1: Remove trailing executable name (anything after the last '/')
4940 * from the perl path to give a perl prefix
4942 * While the @INC element starts "../" and the prefix ends with a real
4943 * directory (ie not . or ..) chop that real directory off the prefix
4944 * and the leading "../" from the @INC element. ie a logical "../"
4946 * Finally concatenate the prefix and the remainder of the @INC element
4947 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4948 * generates /usr/local/lib/perl5
4950 const char *libpath = SvPVX(libdir);
4951 STRLEN libpath_len = SvCUR(libdir);
4952 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4954 SV * const caret_X = get_sv("\030", 0);
4955 /* Going to use the SV just as a scratch buffer holding a C
4961 /* $^X is *the* source of taint if tainting is on, hence
4962 SvPOK() won't be true. */
4964 assert(SvPOKp(caret_X));
4965 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4966 /* Firstly take off the leading .../
4967 If all else fail we'll do the paths relative to the current
4969 sv_chop(libdir, libpath + 4);
4970 /* Don't use SvPV as we're intentionally bypassing taining,
4971 mortal copies that the mg_get of tainting creates, and
4972 corruption that seems to come via the save stack.
4973 I guess that the save stack isn't correctly set up yet. */
4974 libpath = SvPVX(libdir);
4975 libpath_len = SvCUR(libdir);
4977 /* This would work more efficiently with memrchr, but as it's
4978 only a GNU extension we'd need to probe for it and
4979 implement our own. Not hard, but maybe not worth it? */
4981 prefix = SvPVX(prefix_sv);
4982 lastslash = strrchr(prefix, '/');
4984 /* First time in with the *lastslash = '\0' we just wipe off
4985 the trailing /perl from (say) /usr/foo/bin/perl
4989 while ((*lastslash = '\0'), /* Do that, come what may. */
4990 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4991 && (lastslash = strrchr(prefix, '/')))) {
4992 if (lastslash[1] == '\0'
4993 || (lastslash[1] == '.'
4994 && (lastslash[2] == '/' /* ends "/." */
4995 || (lastslash[2] == '/'
4996 && lastslash[3] == '/' /* or "/.." */
4998 /* Prefix ends "/" or "/." or "/..", any of which
4999 are fishy, so don't do any more logical cleanup.
5003 /* Remove leading "../" from path */
5006 /* Next iteration round the loop removes the last
5007 directory name from prefix by writing a '\0' in
5008 the while clause. */
5010 /* prefix has been terminated with a '\0' to the correct
5011 length. libpath points somewhere into the libdir SV.
5012 We need to join the 2 with '/' and drop the result into
5014 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5015 SvREFCNT_dec(libdir);
5016 /* And this is the new libdir. */
5019 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5020 /* Need to taint reloccated paths if running set ID */
5021 SvTAINTED_on(libdir);
5024 SvREFCNT_dec(prefix_sv);
5029 * BEFORE pushing libdir onto @INC we may first push version- and
5030 * archname-specific sub-directories.
5032 if (addsubdirs || addoldvers) {
5033 #ifdef PERL_INC_VERSION_LIST
5034 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5035 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5036 const char * const *incver;
5042 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5044 while (unix[len-1] == '/') len--; /* Cosmetic */
5045 sv_usepvn(libdir,unix,len);
5048 PerlIO_printf(Perl_error_log,
5049 "Failed to unixify @INC element \"%s\"\n",
5053 #ifdef MACOS_TRADITIONAL
5054 #define PERL_AV_SUFFIX_FMT ""
5055 #define PERL_ARCH_FMT "%s:"
5056 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5058 #define PERL_AV_SUFFIX_FMT "/"
5059 #define PERL_ARCH_FMT "/%s"
5060 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5062 /* .../version/archname if -d .../version/archname */
5063 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5065 (int)PERL_REVISION, (int)PERL_VERSION,
5066 (int)PERL_SUBVERSION, ARCHNAME);
5067 subdir = S_incpush_if_exists(aTHX_ subdir);
5069 /* .../version if -d .../version */
5070 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5072 (int)PERL_REVISION, (int)PERL_VERSION,
5073 (int)PERL_SUBVERSION);
5074 subdir = S_incpush_if_exists(aTHX_ subdir);
5076 /* .../archname if -d .../archname */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5078 SVfARG(libdir), ARCHNAME);
5079 subdir = S_incpush_if_exists(aTHX_ subdir);
5083 #ifdef PERL_INC_VERSION_LIST
5085 for (incver = incverlist; *incver; incver++) {
5086 /* .../xxx if -d .../xxx */
5087 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5088 SVfARG(libdir), *incver);
5089 subdir = S_incpush_if_exists(aTHX_ subdir);
5095 /* finally push this lib directory on the end of @INC */
5096 av_push(GvAVn(PL_incgv), libdir);
5099 assert (SvREFCNT(subdir) == 1);
5100 SvREFCNT_dec(subdir);
5106 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5110 const line_t oldline = CopLINE(PL_curcop);
5116 while (av_len(paramList) >= 0) {
5117 cv = (CV*)av_shift(paramList);
5119 if (paramList == PL_beginav) {
5120 /* save PL_beginav for compiler */
5121 if (! PL_beginav_save)
5122 PL_beginav_save = newAV();
5123 av_push(PL_beginav_save, (SV*)cv);
5125 else if (paramList == PL_checkav) {
5126 /* save PL_checkav for compiler */
5127 if (! PL_checkav_save)
5128 PL_checkav_save = newAV();
5129 av_push(PL_checkav_save, (SV*)cv);
5131 else if (paramList == PL_unitcheckav) {
5132 /* save PL_unitcheckav for compiler */
5133 if (! PL_unitcheckav_save)
5134 PL_unitcheckav_save = newAV();
5135 av_push(PL_unitcheckav_save, (SV*)cv);
5146 PL_madskills |= 16384;
5151 PL_madskills &= ~16384;
5154 (void)SvPV_const(atsv, len);
5155 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5156 break; /* not really trying to run, so just wing it */
5158 PL_curcop = &PL_compiling;
5159 CopLINE_set(PL_curcop, oldline);
5160 if (paramList == PL_beginav)
5161 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5163 Perl_sv_catpvf(aTHX_ atsv,
5164 "%s failed--call queue aborted",
5165 paramList == PL_checkav ? "CHECK"
5166 : paramList == PL_initav ? "INIT"
5167 : paramList == PL_unitcheckav ? "UNITCHECK"
5169 while (PL_scopestack_ix > oldscope)
5172 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5179 /* my_exit() was called */
5180 while (PL_scopestack_ix > oldscope)
5183 PL_curstash = PL_defstash;
5184 PL_curcop = &PL_compiling;
5185 CopLINE_set(PL_curcop, oldline);
5187 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5188 return; /* not really trying to run, so just wing it */
5189 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5190 if (paramList == PL_beginav)
5191 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5193 Perl_croak(aTHX_ "%s failed--call queue aborted",
5194 paramList == PL_checkav ? "CHECK"
5195 : paramList == PL_initav ? "INIT"
5196 : paramList == PL_unitcheckav ? "UNITCHECK"
5203 PL_curcop = &PL_compiling;
5204 CopLINE_set(PL_curcop, oldline);
5207 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5216 Perl_my_exit(pTHX_ U32 status)
5219 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5220 (void*)thr, (unsigned long) status));
5229 STATUS_EXIT_SET(status);
5236 Perl_my_failure_exit(pTHX)
5240 /* We have been called to fall on our sword. The desired exit code
5241 * should be already set in STATUS_UNIX, but could be shifted over
5242 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5245 * If an error code has not been set, then force the issue.
5247 if (MY_POSIX_EXIT) {
5249 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5250 * the exit code when there isn't an error.
5253 if (STATUS_UNIX == 0)
5254 STATUS_UNIX_EXIT_SET(255);
5256 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5258 /* The exit code could have been set by $? or vmsish which
5259 * means that it may not be fatal. So convert
5260 * success/warning codes to fatal.
5262 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5263 STATUS_UNIX_EXIT_SET(255);
5267 /* Traditionally Perl on VMS always expects a Fatal Error. */
5268 if (vaxc$errno & 1) {
5270 /* So force success status to failure */
5271 if (STATUS_NATIVE & 1)
5276 STATUS_UNIX = EINTR; /* In case something cares */
5281 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5283 /* Encode the severity code */
5284 severity = STATUS_NATIVE & STS$M_SEVERITY;
5285 STATUS_UNIX = (severity ? severity : 1) << 8;
5287 /* Perl expects this to be a fatal error */
5288 if (severity != STS$K_SEVERE)
5297 STATUS_UNIX_SET(errno);
5299 exitstatus = STATUS_UNIX >> 8;
5300 if (exitstatus & 255)
5301 STATUS_UNIX_SET(exitstatus);
5303 STATUS_UNIX_SET(255);
5310 S_my_exit_jump(pTHX)
5315 SvREFCNT_dec(PL_e_script);
5319 POPSTACK_TO(PL_mainstack);
5327 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5330 const char * const p = SvPVX_const(PL_e_script);
5331 const char *nl = strchr(p, '\n');
5333 PERL_UNUSED_ARG(idx);
5334 PERL_UNUSED_ARG(maxlen);
5336 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5338 filter_del(read_e_script);
5341 sv_catpvn(buf_sv, p, nl-p);
5342 sv_chop(PL_e_script, nl);
5348 * c-indentation-style: bsd
5350 * indent-tabs-mode: t
5353 * ex: set ts=8 sts=4 sw=4 noet: