3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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 */
583 PL_veto_cleanup = TRUE;
587 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
588 if (destruct_level != 0) {
589 /* Fork here to create a child. Our child's job is to preserve the
590 state of scalars prior to destruction, so that we can instruct it
591 to dump any scalars that we later find have leaked.
592 There's no subtlety in this code - it assumes POSIX, and it doesn't
596 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
597 perror("Debug leaking scalars socketpair failed");
603 perror("Debug leaking scalars fork failed");
607 /* We are the child */
608 const int sock = fd[1];
609 const int debug_fd = PerlIO_fileno(Perl_debug_log);
612 /* Our success message is an integer 0, and a char 0 */
613 static const char success[sizeof(int) + 1];
617 /* We need to close all other file descriptors otherwise we end up
618 with interesting hangs, where the parent closes its end of a
619 pipe, and sits waiting for (another) child to terminate. Only
620 that child never terminates, because it never gets EOF, because
621 we also have the far end of the pipe open. We even need to
622 close the debugging fd, because sometimes it happens to be one
623 end of a pipe, and a process is waiting on the other end for
624 EOF. Normally it would be closed at some point earlier in
625 destruction, but if we happen to cause the pipe to remain open,
626 EOF never occurs, and we get an infinite hang. Hence all the
627 games to pass in a file descriptor if it's actually needed. */
629 f = sysconf(_SC_OPEN_MAX);
631 where = "sysconf failed";
642 union control_un control;
645 struct cmsghdr *cmptr;
649 msg.msg_control = control.control;
650 msg.msg_controllen = sizeof(control.control);
651 /* We're a connected socket so we don't need a source */
655 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
657 vec[0].iov_base = (void*)⌖
658 vec[0].iov_len = sizeof(target);
660 got = recvmsg(sock, &msg, 0);
665 where = "recv failed";
668 if(got < sizeof(target)) {
669 where = "short recv";
673 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
677 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
678 where = "wrong cmsg_len";
681 if(cmptr->cmsg_level != SOL_SOCKET) {
682 where = "wrong cmsg_level";
685 if(cmptr->cmsg_type != SCM_RIGHTS) {
686 where = "wrong cmsg_type";
690 got_fd = *(int*)CMSG_DATA(cmptr);
691 /* For our last little bit of trickery, put the file descriptor
692 back into Perl_debug_log, as if we never actually closed it
694 if(got_fd != debug_fd) {
695 if (dup2(got_fd, debug_fd) == -1) {
702 PerlIO_flush(Perl_debug_log);
704 got = write(sock, &success, sizeof(success));
707 where = "write failed";
710 if(got < sizeof(success)) {
711 where = "short write";
718 int send_errno = errno;
719 unsigned char length = (unsigned char) strlen(where);
720 struct iovec failure[3] = {
721 {(void*)&send_errno, sizeof(send_errno)},
723 {(void*)where, length}
725 int got = writev(sock, failure, 3);
726 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
727 in the parent if we try to read from the socketpair after the
728 child has exited, even if there was data to read.
729 So sleep a bit to give the parent a fighting chance of
732 _exit((got == -1) ? errno : 0);
736 PL_dumper_fd = fd[0];
741 /* We must account for everything. */
743 /* Destroy the main CV and syntax tree */
744 /* Do this now, because destroying ops can cause new SVs to be generated
745 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
746 PL_curcop to point to a valid op from which the filename structure
748 PL_curcop = &PL_compiling;
750 /* ensure comppad/curpad to refer to main's pad */
751 if (CvPADLIST(PL_main_cv)) {
752 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
754 op_free(PL_main_root);
757 PL_main_start = NULL;
758 SvREFCNT_dec(PL_main_cv);
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
777 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
778 PL_defoutgv = NULL; /* may have been freed */
781 /* unhook hooks which will soon be, or use, destroyed data */
782 SvREFCNT_dec(PL_warnhook);
784 SvREFCNT_dec(PL_diehook);
787 /* call exit list functions */
788 while (PL_exitlistlen-- > 0)
789 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
791 Safefree(PL_exitlist);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
838 /* reset so print() ends up where we expect */
842 /* the syntax tree is shared between clones
843 * so op_free(PL_main_root) only ReREFCNT_dec's
844 * REGEXPs in the parent interpreter
845 * we need to manually ReREFCNT_dec for the clones
848 I32 i = AvFILLp(PL_regex_padav) + 1;
849 SV * const * const ary = AvARRAY(PL_regex_padav);
852 SV * const resv = ary[--i];
854 if (SvFLAGS(resv) & SVf_BREAK) {
855 /* this is PL_reg_curpm, already freed
856 * flag is set in regexec.c:S_regtry
858 SvFLAGS(resv) &= ~SVf_BREAK;
860 else if(SvREPADTMP(resv)) {
861 SvREPADTMP_off(resv);
863 else if(SvIOKp(resv)) {
864 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
869 SvREFCNT_dec(PL_regex_padav);
870 PL_regex_padav = NULL;
874 SvREFCNT_dec((SV*) PL_stashcache);
875 PL_stashcache = NULL;
877 /* loosen bonds of global variables */
880 (void)PerlIO_close(PL_rsfp);
884 /* Filters for program text */
885 SvREFCNT_dec(PL_rsfp_filters);
886 PL_rsfp_filters = NULL;
889 Safefree(PL_splitstr);
894 PL_preprocess = FALSE;
900 PL_doswitches = FALSE;
901 PL_dowarn = G_WARN_OFF;
902 PL_doextract = FALSE;
903 PL_sawampersand = FALSE; /* must save all match strings */
906 Safefree(PL_inplace);
908 SvREFCNT_dec(PL_patchlevel);
911 SvREFCNT_dec(PL_e_script);
917 /* magical thingies */
919 SvREFCNT_dec(PL_ofs_sv); /* $, */
922 SvREFCNT_dec(PL_ors_sv); /* $\ */
925 SvREFCNT_dec(PL_rs); /* $/ */
928 Safefree(PL_osname); /* $^O */
931 SvREFCNT_dec(PL_statname);
935 /* defgv, aka *_ should be taken care of elsewhere */
937 /* clean up after study() */
938 SvREFCNT_dec(PL_lastscream);
939 PL_lastscream = NULL;
940 Safefree(PL_screamfirst);
942 Safefree(PL_screamnext);
946 Safefree(PL_efloatbuf);
950 /* startup and shutdown function lists */
951 SvREFCNT_dec(PL_beginav);
952 SvREFCNT_dec(PL_beginav_save);
953 SvREFCNT_dec(PL_endav);
954 SvREFCNT_dec(PL_checkav);
955 SvREFCNT_dec(PL_checkav_save);
956 SvREFCNT_dec(PL_unitcheckav);
957 SvREFCNT_dec(PL_unitcheckav_save);
958 SvREFCNT_dec(PL_initav);
960 PL_beginav_save = NULL;
963 PL_checkav_save = NULL;
964 PL_unitcheckav = NULL;
965 PL_unitcheckav_save = NULL;
968 /* shortcuts just get cleared */
977 PL_last_in_gv = NULL;
985 PL_DBassertion = NULL;
990 SvREFCNT_dec(PL_argvout_stack);
991 PL_argvout_stack = NULL;
993 SvREFCNT_dec(PL_modglobal);
995 SvREFCNT_dec(PL_preambleav);
996 PL_preambleav = NULL;
997 SvREFCNT_dec(PL_subname);
999 SvREFCNT_dec(PL_linestr);
1001 #ifdef PERL_USES_PL_PIDSTATUS
1002 SvREFCNT_dec(PL_pidstatus);
1003 PL_pidstatus = NULL;
1005 SvREFCNT_dec(PL_toptarget);
1006 PL_toptarget = NULL;
1007 SvREFCNT_dec(PL_bodytarget);
1008 PL_bodytarget = NULL;
1009 PL_formtarget = NULL;
1011 /* free locale stuff */
1012 #ifdef USE_LOCALE_COLLATE
1013 Safefree(PL_collation_name);
1014 PL_collation_name = NULL;
1017 #ifdef USE_LOCALE_NUMERIC
1018 Safefree(PL_numeric_name);
1019 PL_numeric_name = NULL;
1020 SvREFCNT_dec(PL_numeric_radix_sv);
1021 PL_numeric_radix_sv = NULL;
1024 /* clear utf8 character classes */
1025 SvREFCNT_dec(PL_utf8_alnum);
1026 SvREFCNT_dec(PL_utf8_alnumc);
1027 SvREFCNT_dec(PL_utf8_ascii);
1028 SvREFCNT_dec(PL_utf8_alpha);
1029 SvREFCNT_dec(PL_utf8_space);
1030 SvREFCNT_dec(PL_utf8_cntrl);
1031 SvREFCNT_dec(PL_utf8_graph);
1032 SvREFCNT_dec(PL_utf8_digit);
1033 SvREFCNT_dec(PL_utf8_upper);
1034 SvREFCNT_dec(PL_utf8_lower);
1035 SvREFCNT_dec(PL_utf8_print);
1036 SvREFCNT_dec(PL_utf8_punct);
1037 SvREFCNT_dec(PL_utf8_xdigit);
1038 SvREFCNT_dec(PL_utf8_mark);
1039 SvREFCNT_dec(PL_utf8_toupper);
1040 SvREFCNT_dec(PL_utf8_totitle);
1041 SvREFCNT_dec(PL_utf8_tolower);
1042 SvREFCNT_dec(PL_utf8_tofold);
1043 SvREFCNT_dec(PL_utf8_idstart);
1044 SvREFCNT_dec(PL_utf8_idcont);
1045 PL_utf8_alnum = NULL;
1046 PL_utf8_alnumc = NULL;
1047 PL_utf8_ascii = NULL;
1048 PL_utf8_alpha = NULL;
1049 PL_utf8_space = NULL;
1050 PL_utf8_cntrl = NULL;
1051 PL_utf8_graph = NULL;
1052 PL_utf8_digit = NULL;
1053 PL_utf8_upper = NULL;
1054 PL_utf8_lower = NULL;
1055 PL_utf8_print = NULL;
1056 PL_utf8_punct = NULL;
1057 PL_utf8_xdigit = NULL;
1058 PL_utf8_mark = NULL;
1059 PL_utf8_toupper = NULL;
1060 PL_utf8_totitle = NULL;
1061 PL_utf8_tolower = NULL;
1062 PL_utf8_tofold = NULL;
1063 PL_utf8_idstart = NULL;
1064 PL_utf8_idcont = NULL;
1066 if (!specialWARN(PL_compiling.cop_warnings))
1067 PerlMemShared_free(PL_compiling.cop_warnings);
1068 PL_compiling.cop_warnings = NULL;
1069 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1070 PL_compiling.cop_hints_hash = NULL;
1071 CopFILE_free(&PL_compiling);
1072 CopSTASH_free(&PL_compiling);
1074 /* Prepare to destruct main symbol table. */
1079 SvREFCNT_dec(PL_curstname);
1080 PL_curstname = NULL;
1082 /* clear queued errors */
1083 SvREFCNT_dec(PL_errors);
1087 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1088 if (PL_scopestack_ix != 0)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1090 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1091 (long)PL_scopestack_ix);
1092 if (PL_savestack_ix != 0)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1094 "Unbalanced saves: %ld more saves than restores\n",
1095 (long)PL_savestack_ix);
1096 if (PL_tmps_floor != -1)
1097 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1098 (long)PL_tmps_floor + 1);
1099 if (cxstack_ix != -1)
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1101 (long)cxstack_ix + 1);
1104 /* Now absolutely destruct everything, somehow or other, loops or no. */
1105 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1106 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1108 /* the 2 is for PL_fdpid and PL_strtab */
1109 while (PL_sv_count > 2 && sv_clean_all())
1112 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1113 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1114 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1115 SvFLAGS(PL_strtab) |= SVt_PVHV;
1117 AvREAL_off(PL_fdpid); /* no surviving entries */
1118 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1121 #ifdef HAVE_INTERP_INTERN
1125 /* Destruct the global string table. */
1127 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1128 * so that sv_free() won't fail on them.
1129 * Now that the global string table is using a single hunk of memory
1130 * for both HE and HEK, we either need to explicitly unshare it the
1131 * correct way, or actually free things here.
1134 const I32 max = HvMAX(PL_strtab);
1135 HE * const * const array = HvARRAY(PL_strtab);
1136 HE *hent = array[0];
1139 if (hent && ckWARN_d(WARN_INTERNAL)) {
1140 HE * const next = HeNEXT(hent);
1141 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1142 "Unbalanced string table refcount: (%ld) for \"%s\"",
1143 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1150 hent = array[riter];
1155 HvARRAY(PL_strtab) = 0;
1156 HvTOTALKEYS(PL_strtab) = 0;
1157 HvFILL(PL_strtab) = 0;
1159 SvREFCNT_dec(PL_strtab);
1162 /* free the pointer tables used for cloning */
1163 ptr_table_free(PL_ptr_table);
1164 PL_ptr_table = (PTR_TBL_t*)NULL;
1167 /* free special SVs */
1169 SvREFCNT(&PL_sv_yes) = 0;
1170 sv_clear(&PL_sv_yes);
1171 SvANY(&PL_sv_yes) = NULL;
1172 SvFLAGS(&PL_sv_yes) = 0;
1174 SvREFCNT(&PL_sv_no) = 0;
1175 sv_clear(&PL_sv_no);
1176 SvANY(&PL_sv_no) = NULL;
1177 SvFLAGS(&PL_sv_no) = 0;
1181 for (i=0; i<=2; i++) {
1182 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1183 sv_clear(PERL_DEBUG_PAD(i));
1184 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1185 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1189 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1190 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1192 #ifdef DEBUG_LEAKING_SCALARS
1193 if (PL_sv_count != 0) {
1198 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1199 svend = &sva[SvREFCNT(sva)];
1200 for (sv = sva + 1; sv < svend; ++sv) {
1201 if (SvTYPE(sv) != SVTYPEMASK) {
1202 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1204 " refcnt=%"UVuf pTHX__FORMAT "\n"
1205 "\tallocated at %s:%d %s %s%s\n",
1206 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1207 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1209 sv->sv_debug_inpad ? "for" : "by",
1210 sv->sv_debug_optype ?
1211 PL_op_name[sv->sv_debug_optype]: "(none)",
1212 sv->sv_debug_cloned ? " (cloned)" : ""
1214 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1215 Perl_dump_sv_child(aTHX_ sv);
1221 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1225 /* Wait for up to 4 seconds for child to terminate.
1226 This seems to be the least effort way of timing out on reaping
1228 struct timeval waitfor = {4, 0};
1229 int sock = PL_dumper_fd;
1233 FD_SET(sock, &rset);
1234 select(sock + 1, &rset, NULL, NULL, &waitfor);
1235 waitpid(child, &status, WNOHANG);
1243 #if defined(PERLIO_LAYERS)
1244 /* No more IO - including error messages ! */
1245 PerlIO_cleanup(aTHX);
1248 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1249 as currently layers use it rather than NULL as a marker
1250 for no arg - and will try and SvREFCNT_dec it.
1252 SvREFCNT(&PL_sv_undef) = 0;
1253 SvREADONLY_off(&PL_sv_undef);
1255 Safefree(PL_origfilename);
1256 PL_origfilename = NULL;
1257 Safefree(PL_reg_start_tmp);
1258 PL_reg_start_tmp = (char**)NULL;
1259 PL_reg_start_tmpl = 0;
1260 Safefree(PL_reg_curpm);
1261 Safefree(PL_reg_poscache);
1262 free_tied_hv_pool();
1263 Safefree(PL_op_mask);
1264 Safefree(PL_psig_ptr);
1265 PL_psig_ptr = (SV**)NULL;
1266 Safefree(PL_psig_name);
1267 PL_psig_name = (SV**)NULL;
1268 Safefree(PL_bitcount);
1270 Safefree(PL_psig_pend);
1271 PL_psig_pend = (int*)NULL;
1274 PL_tainting = FALSE;
1275 PL_taint_warn = FALSE;
1276 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1279 DEBUG_P(debprofdump());
1281 #ifdef USE_REENTRANT_API
1282 Perl_reentrant_free(aTHX);
1287 while (PL_regmatch_slab) {
1288 regmatch_slab *s = PL_regmatch_slab;
1289 PL_regmatch_slab = PL_regmatch_slab->next;
1293 /* As the absolutely last thing, free the non-arena SV for mess() */
1296 /* we know that type == SVt_PVMG */
1298 /* it could have accumulated taint magic */
1301 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1302 moremagic = mg->mg_moremagic;
1303 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1305 Safefree(mg->mg_ptr);
1309 /* we know that type >= SVt_PV */
1310 SvPV_free(PL_mess_sv);
1311 Safefree(SvANY(PL_mess_sv));
1312 Safefree(PL_mess_sv);
1319 =for apidoc perl_free
1321 Releases a Perl interpreter. See L<perlembed>.
1329 if (PL_veto_cleanup)
1332 #ifdef PERL_TRACK_MEMPOOL
1335 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1336 * value as we're probably hunting memory leaks then
1338 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1339 if (!s || atoi(s) == 0) {
1340 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1341 thread at thread exit. */
1342 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1343 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1348 #if defined(WIN32) || defined(NETWARE)
1349 # if defined(PERL_IMPLICIT_SYS)
1352 void *host = nw_internal_host;
1354 void *host = w32_internal_host;
1356 PerlMem_free(aTHXx);
1358 nw_delete_internal_host(host);
1360 win32_delete_internal_host(host);
1364 PerlMem_free(aTHXx);
1367 PerlMem_free(aTHXx);
1371 #if defined(USE_ITHREADS)
1372 /* provide destructors to clean up the thread key when libperl is unloaded */
1373 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1375 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1376 #pragma fini "perl_fini"
1377 #elif defined(__sun) && !defined(__GNUC__)
1378 #pragma fini (perl_fini)
1382 #if defined(__GNUC__)
1383 __attribute__((destructor))
1388 if (PL_curinterp && !PL_veto_cleanup)
1393 #endif /* THREADS */
1396 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1399 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1400 PL_exitlist[PL_exitlistlen].fn = fn;
1401 PL_exitlist[PL_exitlistlen].ptr = ptr;
1405 #ifdef HAS_PROCSELFEXE
1406 /* This is a function so that we don't hold on to MAXPATHLEN
1407 bytes of stack longer than necessary
1410 S_procself_val(pTHX_ SV *sv, const char *arg0)
1412 char buf[MAXPATHLEN];
1413 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1415 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1416 includes a spurious NUL which will cause $^X to fail in system
1417 or backticks (this will prevent extensions from being built and
1418 many tests from working). readlink is not meant to add a NUL.
1419 Normal readlink works fine.
1421 if (len > 0 && buf[len-1] == '\0') {
1425 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1426 returning the text "unknown" from the readlink rather than the path
1427 to the executable (or returning an error from the readlink). Any valid
1428 path has a '/' in it somewhere, so use that to validate the result.
1429 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1431 if (len > 0 && memchr(buf, '/', len)) {
1432 sv_setpvn(sv,buf,len);
1438 #endif /* HAS_PROCSELFEXE */
1441 S_set_caret_X(pTHX) {
1443 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1445 #ifdef HAS_PROCSELFEXE
1446 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1449 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1451 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1458 =for apidoc perl_parse
1460 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1466 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1473 PERL_UNUSED_ARG(my_perl);
1475 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1478 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1479 setuid perl scripts securely.\n");
1480 #endif /* IAMSUID */
1483 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1484 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1485 * This MUST be done before any hash stores or fetches take place.
1486 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1487 * yourself, it is your responsibility to provide a good random seed!
1488 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1489 if (!PL_rehash_seed_set)
1490 PL_rehash_seed = get_hash_seed();
1492 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1494 if (s && (atoi(s) == 1))
1495 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1497 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1502 if (PL_origalen != 0) {
1503 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1506 /* Set PL_origalen be the sum of the contiguous argv[]
1507 * elements plus the size of the env in case that it is
1508 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1509 * as the maximum modifiable length of $0. In the worst case
1510 * the area we are able to modify is limited to the size of
1511 * the original argv[0]. (See below for 'contiguous', though.)
1513 const char *s = NULL;
1516 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1517 /* Do the mask check only if the args seem like aligned. */
1519 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1521 /* See if all the arguments are contiguous in memory. Note
1522 * that 'contiguous' is a loose term because some platforms
1523 * align the argv[] and the envp[]. If the arguments look
1524 * like non-aligned, assume that they are 'strictly' or
1525 * 'traditionally' contiguous. If the arguments look like
1526 * aligned, we just check that they are within aligned
1527 * PTRSIZE bytes. As long as no system has something bizarre
1528 * like the argv[] interleaved with some other data, we are
1529 * fine. (Did I just evoke Murphy's Law?) --jhi */
1530 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1532 for (i = 1; i < PL_origargc; i++) {
1533 if ((PL_origargv[i] == s + 1
1535 || PL_origargv[i] == s + 2
1540 (PL_origargv[i] > s &&
1542 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1552 /* Can we grab env area too to be used as the area for $0? */
1553 if (s && PL_origenviron) {
1554 if ((PL_origenviron[0] == s + 1)
1557 (PL_origenviron[0] > s &&
1558 PL_origenviron[0] <=
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1562 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1563 s = PL_origenviron[0];
1566 my_setenv("NoNe SuCh", NULL);
1567 /* Force copy of environment. */
1568 for (i = 1; PL_origenviron[i]; i++) {
1569 if (PL_origenviron[i] == s + 1
1572 (PL_origenviron[i] > s &&
1573 PL_origenviron[i] <=
1574 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 s = PL_origenviron[i];
1585 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1590 /* Come here if running an undumped a.out. */
1592 PL_origfilename = savepv(argv[0]);
1593 PL_do_undump = FALSE;
1594 cxstack_ix = -1; /* start label stack again */
1596 assert (!PL_tainted);
1598 S_set_caret_X(aTHX);
1600 init_postdump_symbols(argc,argv,env);
1605 op_free(PL_main_root);
1606 PL_main_root = NULL;
1608 PL_main_start = NULL;
1609 SvREFCNT_dec(PL_main_cv);
1613 oldscope = PL_scopestack_ix;
1614 PL_dowarn = G_WARN_OFF;
1619 parse_body(env,xsinit);
1621 call_list(oldscope, PL_unitcheckav);
1623 call_list(oldscope, PL_checkav);
1630 /* my_exit() was called */
1631 while (PL_scopestack_ix > oldscope)
1634 PL_curstash = PL_defstash;
1636 call_list(oldscope, PL_unitcheckav);
1638 call_list(oldscope, PL_checkav);
1642 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1651 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1654 int argc = PL_origargc;
1655 char **argv = PL_origargv;
1656 const char *scriptname = NULL;
1657 VOL bool dosearch = FALSE;
1658 const char *validarg = "";
1660 register char *s, c;
1661 const char *cddir = NULL;
1662 #ifdef USE_SITECUSTOMIZE
1663 bool minus_f = FALSE;
1666 sv_setpvn(PL_linestr,"",0);
1667 sv = newSVpvs(""); /* first used for -I flags */
1671 for (argc--,argv++; argc > 0; argc--,argv++) {
1672 if (argv[0][0] != '-' || !argv[0][1])
1676 validarg = " PHOOEY ";
1680 * Can we rely on the kernel to start scripts with argv[1] set to
1681 * contain all #! line switches (the whole line)? (argv[0] is set to
1682 * the interpreter name, argv[2] to the script name; argv[3] and
1683 * above may contain other arguments.)
1690 #ifndef PERL_STRICT_CR
1715 if ((s = moreswitches(s)))
1720 CHECK_MALLOC_TOO_LATE_FOR('t');
1721 if( !PL_tainting ) {
1722 PL_taint_warn = TRUE;
1728 CHECK_MALLOC_TOO_LATE_FOR('T');
1730 PL_taint_warn = FALSE;
1738 #ifdef MACOS_TRADITIONAL
1739 /* ignore -e for Dev:Pseudo argument */
1740 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1743 forbid_setid('e', -1);
1745 PL_e_script = newSVpvs("");
1746 filter_add(read_e_script, NULL);
1749 sv_catpv(PL_e_script, s);
1751 sv_catpv(PL_e_script, argv[1]);
1755 Perl_croak(aTHX_ "No code specified for -%c", c);
1756 sv_catpvs(PL_e_script, "\n");
1760 #ifdef USE_SITECUSTOMIZE
1766 case 'I': /* -I handled both here and in moreswitches() */
1767 forbid_setid('I', -1);
1768 if (!*++s && (s=argv[1]) != NULL) {
1772 STRLEN len = strlen(s);
1773 const char * const p = savepvn(s, len);
1774 incpush(p, TRUE, TRUE, FALSE, FALSE);
1775 sv_catpvs(sv, "-I");
1776 sv_catpvn(sv, p, len);
1781 Perl_croak(aTHX_ "No directory specified for -I");
1784 forbid_setid('P', -1);
1785 PL_preprocess = TRUE;
1789 forbid_setid('S', -1);
1798 PL_preambleav = newAV();
1799 av_push(PL_preambleav,
1800 newSVpvs("use Config;"));
1804 opts_prog = newSVpvs("print Config::myconfig(),");
1806 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1810 opts = SvCUR(opts_prog);
1812 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1816 # ifdef DEBUG_LEAKING_SCALARS
1817 " DEBUG_LEAKING_SCALARS"
1819 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1820 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1822 # ifdef FAKE_THREADS
1825 # ifdef MULTIPLICITY
1834 # ifdef PERL_DONT_CREATE_GVSV
1835 " PERL_DONT_CREATE_GVSV"
1837 # ifdef PERL_GLOBAL_STRUCT
1838 " PERL_GLOBAL_STRUCT"
1840 # ifdef PERL_IMPLICIT_CONTEXT
1841 " PERL_IMPLICIT_CONTEXT"
1843 # ifdef PERL_IMPLICIT_SYS
1844 " PERL_IMPLICIT_SYS"
1849 # ifdef PERL_MALLOC_WRAP
1852 # ifdef PERL_NEED_APPCTX
1855 # ifdef PERL_NEED_TIMESBASE
1856 " PERL_NEED_TIMESBASE"
1858 # ifdef PERL_OLD_COPY_ON_WRITE
1859 " PERL_OLD_COPY_ON_WRITE"
1861 # ifdef PERL_TRACK_MEMPOOL
1862 " PERL_TRACK_MEMPOOL"
1864 # ifdef PERL_USE_SAFE_PUTENV
1865 " PERL_USE_SAFE_PUTENV"
1867 #ifdef PERL_USES_PL_PIDSTATUS
1868 " PERL_USES_PL_PIDSTATUS"
1870 # ifdef PL_OP_SLAB_ALLOC
1873 # ifdef THREADS_HAVE_PIDS
1874 " THREADS_HAVE_PIDS"
1876 # ifdef USE_64_BIT_ALL
1879 # ifdef USE_64_BIT_INT
1882 # ifdef USE_ITHREADS
1885 # ifdef USE_LARGE_FILES
1888 # ifdef USE_LONG_DOUBLE
1894 # ifdef USE_REENTRANT_API
1895 " USE_REENTRANT_API"
1900 # ifdef USE_SITECUSTOMIZE
1901 " USE_SITECUSTOMIZE"
1908 while (SvCUR(opts_prog) > opts+76) {
1909 /* find last space after "options: " and before col 76
1913 char * const pv = SvPV_nolen(opts_prog);
1914 const char c = pv[opts+76];
1916 space = strrchr(pv+opts+26, ' ');
1918 if (!space) break; /* "Can't happen" */
1920 /* break the line before that space */
1923 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1924 STR_WITH_LEN("\\n "));
1927 sv_catpvs(opts_prog,"\\n\",");
1929 #if defined(LOCAL_PATCH_COUNT)
1930 if (LOCAL_PATCH_COUNT > 0) {
1932 sv_catpvs(opts_prog,
1933 "\" Locally applied patches:\\n\",");
1934 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1935 if (PL_localpatches[i])
1936 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1937 0, PL_localpatches[i], 0);
1941 Perl_sv_catpvf(aTHX_ opts_prog,
1942 "\" Built under %s\\n\"",OSNAME);
1945 Perl_sv_catpvf(aTHX_ opts_prog,
1946 ",\" Compiled at %s %s\\n\"",__DATE__,
1949 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1953 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1954 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1955 "sort grep {/^PERL/} keys %ENV; ");
1957 sv_catpvs(opts_prog,
1958 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1960 sv_catpvs(opts_prog,
1961 "print \" \\%ENV:\\n @env\\n\" if @env;"
1962 "print \" \\@INC:\\n @INC\\n\";");
1966 opts_prog = Perl_newSVpvf(aTHX_
1967 "Config::config_vars(qw%c%s%c)",
1971 av_push(PL_preambleav, opts_prog);
1972 /* don't look for script or read stdin */
1973 scriptname = BIT_BUCKET;
1977 PL_doextract = TRUE;
1985 if (!*++s || isSPACE(*s)) {
1989 /* catch use of gnu style long options */
1990 if (strEQ(s, "version")) {
1994 if (strEQ(s, "help")) {
2001 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2007 #ifndef SECURE_INTERNAL_GETENV
2010 (s = PerlEnv_getenv("PERL5OPT")))
2012 const char *popt = s;
2015 if (*s == '-' && *(s+1) == 'T') {
2016 CHECK_MALLOC_TOO_LATE_FOR('T');
2018 PL_taint_warn = FALSE;
2021 char *popt_copy = NULL;
2034 if (!strchr("CDIMUdmtwA", *s))
2035 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2039 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2040 s = popt_copy + (s - popt);
2041 d = popt_copy + (d - popt);
2048 if( !PL_tainting ) {
2049 PL_taint_warn = TRUE;
2059 #ifdef USE_SITECUSTOMIZE
2062 PL_preambleav = newAV();
2063 av_unshift(PL_preambleav, 1);
2064 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2069 scriptname = argv[0];
2072 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2074 else if (scriptname == NULL) {
2076 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2082 /* Set $^X early so that it can be used for relocatable paths in @INC */
2083 assert (!PL_tainted);
2085 S_set_caret_X(aTHX);
2092 = open_script(scriptname, dosearch, sv, &suidscript);
2094 validate_suid(validarg, scriptname, fdscript, suidscript);
2097 # if defined(SIGCHLD) || defined(SIGCLD)
2100 # define SIGCHLD SIGCLD
2102 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2103 if (sigstate == (Sighandler_t) SIG_IGN) {
2104 if (ckWARN(WARN_SIGNAL))
2105 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2106 "Can't ignore signal CHLD, forcing to default");
2107 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2114 #ifdef MACOS_TRADITIONAL
2115 || gMacPerl_AlwaysExtract
2119 /* This will croak if suidscript is >= 0, as -x cannot be used with
2121 forbid_setid('x', suidscript);
2122 /* Hence you can't get here if suidscript >= 0 */
2125 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2126 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2130 PL_main_cv = PL_compcv = (CV*)newSV(0);
2131 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2132 CvUNIQUE_on(PL_compcv);
2134 CvPADLIST(PL_compcv) = pad_new(0);
2137 boot_core_UNIVERSAL();
2138 boot_core_xsutils();
2141 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2143 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2149 # ifdef HAS_SOCKS5_INIT
2150 socks5_init(argv[0]);
2156 init_predump_symbols();
2157 /* init_postdump_symbols not currently designed to be called */
2158 /* more than once (ENV isn't cleared first, for example) */
2159 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2161 init_postdump_symbols(argc,argv,env);
2163 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2164 * or explicitly in some platforms.
2165 * locale.c:Perl_init_i18nl10n() if the environment
2166 * look like the user wants to use UTF-8. */
2167 #if defined(__SYMBIAN32__)
2168 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2171 /* Requires init_predump_symbols(). */
2172 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2177 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2178 * and the default open disciplines. */
2179 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2180 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2182 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2183 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2184 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2186 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2187 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2188 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2190 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2191 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2192 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2194 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2195 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2198 sv_setpvn(sv, ":utf8\0:utf8", 11);
2200 sv_setpvn(sv, ":utf8\0", 6);
2203 sv_setpvn(sv, "\0:utf8", 6);
2209 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2210 if (strEQ(s, "unsafe"))
2211 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2212 else if (strEQ(s, "safe"))
2213 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2215 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2219 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2223 PL_xmlfp = PerlIO_stdout();
2225 PL_xmlfp = PerlIO_open(s, "w");
2227 Perl_croak(aTHX_ "Can't open %s", s);
2229 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2231 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2232 PL_madskills = atoi(s);
2233 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2239 /* now parse the script */
2241 SETERRNO(0,SS_NORMAL);
2243 #ifdef MACOS_TRADITIONAL
2244 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2246 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2248 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2249 MacPerl_MPWFileName(PL_origfilename));
2253 if (yyparse() || PL_error_count) {
2255 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2257 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2262 CopLINE_set(PL_curcop, 0);
2263 PL_curstash = PL_defstash;
2264 PL_preprocess = FALSE;
2266 SvREFCNT_dec(PL_e_script);
2274 SAVECOPFILE(PL_curcop);
2275 SAVECOPLINE(PL_curcop);
2276 gv_check(PL_defstash);
2283 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2284 dump_mstats("after compilation:");
2293 =for apidoc perl_run
2295 Tells a Perl interpreter to run. See L<perlembed>.
2308 PERL_UNUSED_ARG(my_perl);
2310 oldscope = PL_scopestack_ix;
2318 cxstack_ix = -1; /* start context stack again */
2320 case 0: /* normal completion */
2324 case 2: /* my_exit() */
2325 while (PL_scopestack_ix > oldscope)
2328 PL_curstash = PL_defstash;
2329 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2330 PL_endav && !PL_minus_c)
2331 call_list(oldscope, PL_endav);
2333 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2334 dump_mstats("after execution: ");
2340 POPSTACK_TO(PL_mainstack);
2343 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2355 S_run_body(pTHX_ I32 oldscope)
2358 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2359 PL_sawampersand ? "Enabling" : "Omitting"));
2361 if (!PL_restartop) {
2365 exit(0); /* less likely to core dump than my_exit(0) */
2368 DEBUG_x(dump_all());
2371 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2373 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2377 #ifdef MACOS_TRADITIONAL
2378 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2379 (gMacPerl_ErrorFormat ? "# " : ""),
2380 MacPerl_MPWFileName(PL_origfilename));
2382 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2386 if (PERLDB_SINGLE && PL_DBsingle)
2387 sv_setiv(PL_DBsingle, 1);
2389 call_list(oldscope, PL_initav);
2395 PL_op = PL_restartop;
2399 else if (PL_main_start) {
2400 CvDEPTH(PL_main_cv) = 1;
2401 PL_op = PL_main_start;
2409 =head1 SV Manipulation Functions
2411 =for apidoc p||get_sv
2413 Returns the SV of the specified Perl scalar. If C<create> is set and the
2414 Perl variable does not exist then it will be created. If C<create> is not
2415 set and the variable does not exist then NULL is returned.
2421 Perl_get_sv(pTHX_ const char *name, I32 create)
2424 gv = gv_fetchpv(name, create, SVt_PV);
2431 =head1 Array Manipulation Functions
2433 =for apidoc p||get_av
2435 Returns the AV of the specified Perl array. If C<create> is set and the
2436 Perl variable does not exist then it will be created. If C<create> is not
2437 set and the variable does not exist then NULL is returned.
2443 Perl_get_av(pTHX_ const char *name, I32 create)
2445 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2454 =head1 Hash Manipulation Functions
2456 =for apidoc p||get_hv
2458 Returns the HV of the specified Perl hash. If C<create> is set and the
2459 Perl variable does not exist then it will be created. If C<create> is not
2460 set and the variable does not exist then NULL is returned.
2466 Perl_get_hv(pTHX_ const char *name, I32 create)
2468 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2477 =head1 CV Manipulation Functions
2479 =for apidoc p||get_cv
2481 Returns the CV of the specified Perl subroutine. If C<create> is set and
2482 the Perl subroutine does not exist then it will be declared (which has the
2483 same effect as saying C<sub name;>). If C<create> is not set and the
2484 subroutine does not exist then NULL is returned.
2490 Perl_get_cv(pTHX_ const char *name, I32 create)
2492 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2493 /* XXX unsafe for threads if eval_owner isn't held */
2494 /* XXX this is probably not what they think they're getting.
2495 * It has the same effect as "sub name;", i.e. just a forward
2497 if (create && !GvCVu(gv))
2498 return newSUB(start_subparse(FALSE, 0),
2499 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2506 /* Be sure to refetch the stack pointer after calling these routines. */
2510 =head1 Callback Functions
2512 =for apidoc p||call_argv
2514 Performs a callback to the specified Perl sub. See L<perlcall>.
2520 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2522 /* See G_* flags in cop.h */
2523 /* null terminated arg list */
2531 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2536 return call_pv(sub_name, flags);
2540 =for apidoc p||call_pv
2542 Performs a callback to the specified Perl sub. See L<perlcall>.
2548 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2549 /* name of the subroutine */
2550 /* See G_* flags in cop.h */
2552 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2556 =for apidoc p||call_method
2558 Performs a callback to the specified Perl method. The blessed object must
2559 be on the stack. See L<perlcall>.
2565 Perl_call_method(pTHX_ const char *methname, I32 flags)
2566 /* name of the subroutine */
2567 /* See G_* flags in cop.h */
2569 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2572 /* May be called with any of a CV, a GV, or an SV containing the name. */
2574 =for apidoc p||call_sv
2576 Performs a callback to the Perl sub whose name is in the SV. See
2583 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2584 /* See G_* flags in cop.h */
2587 LOGOP myop; /* fake syntax tree node */
2592 bool oldcatch = CATCH_GET;
2594 OP* const oldop = PL_op;
2597 if (flags & G_DISCARD) {
2602 Zero(&myop, 1, LOGOP);
2603 myop.op_next = NULL;
2604 if (!(flags & G_NOARGS))
2605 myop.op_flags |= OPf_STACKED;
2606 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2607 (flags & G_ARRAY) ? OPf_WANT_LIST :
2612 EXTEND(PL_stack_sp, 1);
2613 *++PL_stack_sp = sv;
2615 oldscope = PL_scopestack_ix;
2617 if (PERLDB_SUB && PL_curstash != PL_debstash
2618 /* Handle first BEGIN of -d. */
2619 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2620 /* Try harder, since this may have been a sighandler, thus
2621 * curstash may be meaningless. */
2622 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2623 && !(flags & G_NODEBUG))
2624 PL_op->op_private |= OPpENTERSUB_DB;
2626 if (flags & G_METHOD) {
2627 Zero(&method_op, 1, UNOP);
2628 method_op.op_next = PL_op;
2629 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2630 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2631 PL_op = (OP*)&method_op;
2634 if (!(flags & G_EVAL)) {
2636 CALL_BODY_SUB((OP*)&myop);
2637 retval = PL_stack_sp - (PL_stack_base + oldmark);
2638 CATCH_SET(oldcatch);
2641 myop.op_other = (OP*)&myop;
2643 create_eval_scope(flags|G_FAKINGEVAL);
2651 CALL_BODY_SUB((OP*)&myop);
2652 retval = PL_stack_sp - (PL_stack_base + oldmark);
2653 if (!(flags & G_KEEPERR))
2654 sv_setpvn(ERRSV,"",0);
2660 /* my_exit() was called */
2661 PL_curstash = PL_defstash;
2664 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2665 Perl_croak(aTHX_ "Callback called exit");
2670 PL_op = PL_restartop;
2674 PL_stack_sp = PL_stack_base + oldmark;
2675 if (flags & G_ARRAY)
2679 *++PL_stack_sp = &PL_sv_undef;
2684 if (PL_scopestack_ix > oldscope)
2685 delete_eval_scope();
2689 if (flags & G_DISCARD) {
2690 PL_stack_sp = PL_stack_base + oldmark;
2699 /* Eval a string. The G_EVAL flag is always assumed. */
2702 =for apidoc p||eval_sv
2704 Tells Perl to C<eval> the string in the SV.
2710 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2712 /* See G_* flags in cop.h */
2716 UNOP myop; /* fake syntax tree node */
2717 VOL I32 oldmark = SP - PL_stack_base;
2720 OP* const oldop = PL_op;
2723 if (flags & G_DISCARD) {
2730 Zero(PL_op, 1, UNOP);
2731 EXTEND(PL_stack_sp, 1);
2732 *++PL_stack_sp = sv;
2734 if (!(flags & G_NOARGS))
2735 myop.op_flags = OPf_STACKED;
2736 myop.op_next = NULL;
2737 myop.op_type = OP_ENTEREVAL;
2738 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2739 (flags & G_ARRAY) ? OPf_WANT_LIST :
2741 if (flags & G_KEEPERR)
2742 myop.op_flags |= OPf_SPECIAL;
2744 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2745 * before a PUSHEVAL, which corrupts the stack after a croak */
2746 TAINT_PROPER("eval_sv()");
2752 CALL_BODY_EVAL((OP*)&myop);
2753 retval = PL_stack_sp - (PL_stack_base + oldmark);
2754 if (!(flags & G_KEEPERR))
2755 sv_setpvn(ERRSV,"",0);
2761 /* my_exit() was called */
2762 PL_curstash = PL_defstash;
2765 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2766 Perl_croak(aTHX_ "Callback called exit");
2771 PL_op = PL_restartop;
2775 PL_stack_sp = PL_stack_base + oldmark;
2776 if (flags & G_ARRAY)
2780 *++PL_stack_sp = &PL_sv_undef;
2786 if (flags & G_DISCARD) {
2787 PL_stack_sp = PL_stack_base + oldmark;
2797 =for apidoc p||eval_pv
2799 Tells Perl to C<eval> the given string and return an SV* result.
2805 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2809 SV* sv = newSVpv(p, 0);
2811 eval_sv(sv, G_SCALAR);
2818 if (croak_on_error && SvTRUE(ERRSV)) {
2819 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2825 /* Require a module. */
2828 =head1 Embedding Functions
2830 =for apidoc p||require_pv
2832 Tells Perl to C<require> the file named by the string argument. It is
2833 analogous to the Perl code C<eval "require '$file'">. It's even
2834 implemented that way; consider using load_module instead.
2839 Perl_require_pv(pTHX_ const char *pv)
2844 PUSHSTACKi(PERLSI_REQUIRE);
2846 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2847 eval_sv(sv_2mortal(sv), G_DISCARD);
2853 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2855 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2858 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2862 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2864 /* This message really ought to be max 23 lines.
2865 * Removed -h because the user already knows that option. Others? */
2867 static const char * const usage_msg[] = {
2868 "-0[octal] specify record separator (\\0, if no argument)",
2869 "-A[mod][=pattern] activate all/given assertions",
2870 "-a autosplit mode with -n or -p (splits $_ into @F)",
2871 "-C[number/list] enables the listed Unicode features",
2872 "-c check syntax only (runs BEGIN and CHECK blocks)",
2873 "-d[:debugger] run program under debugger",
2874 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2875 "-e program one line of program (several -e's allowed, omit programfile)",
2876 "-E program like -e, but enables all optional features",
2877 "-f don't do $sitelib/sitecustomize.pl at startup",
2878 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2879 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2880 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2881 "-l[octal] enable line ending processing, specifies line terminator",
2882 "-[mM][-]module execute \"use/no module...\" before executing program",
2883 "-n assume \"while (<>) { ... }\" loop around program",
2884 "-p assume loop like -n but print line also, like sed",
2885 "-P run program through C preprocessor before compilation",
2886 "-s enable rudimentary parsing for switches after programfile",
2887 "-S look for programfile using PATH environment variable",
2888 "-t enable tainting warnings",
2889 "-T enable tainting checks",
2890 "-u dump core after parsing program",
2891 "-U allow unsafe operations",
2892 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2893 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2894 "-w enable many useful warnings (RECOMMENDED)",
2895 "-W enable all warnings",
2896 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2897 "-X disable all warnings",
2901 const char * const *p = usage_msg;
2903 PerlIO_printf(PerlIO_stdout(),
2904 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2907 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2910 /* convert a string of -D options (or digits) into an int.
2911 * sets *s to point to the char after the options */
2915 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2917 static const char * const usage_msgd[] = {
2918 " Debugging flag values: (see also -d)",
2919 " p Tokenizing and parsing (with v, displays parse stack)",
2920 " s Stack snapshots (with v, displays all stacks)",
2921 " l Context (loop) stack processing",
2922 " t Trace execution",
2923 " o Method and overloading resolution",
2924 " c String/numeric conversions",
2925 " P Print profiling info, preprocessor command for -P, source file input state",
2926 " m Memory allocation",
2927 " f Format processing",
2928 " r Regular expression parsing and execution",
2929 " x Syntax tree dump",
2930 " u Tainting checks",
2931 " H Hash dump -- usurps values()",
2932 " X Scratchpad allocation",
2934 " S Thread synchronization",
2936 " R Include reference counts of dumped variables (eg when using -Ds)",
2937 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2938 " v Verbose: use in conjunction with other flags",
2940 " A Consistency checks on internal structures",
2941 " q quiet - currently only suppresses the 'EXECUTING' message",
2946 /* if adding extra options, remember to update DEBUG_MASK */
2947 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2949 for (; isALNUM(**s); (*s)++) {
2950 const char * const d = strchr(debopts,**s);
2952 i |= 1 << (d - debopts);
2953 else if (ckWARN_d(WARN_DEBUGGING))
2954 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2955 "invalid option -D%c, use -D'' to see choices\n", **s);
2958 else if (isDIGIT(**s)) {
2960 for (; isALNUM(**s); (*s)++) ;
2962 else if (givehelp) {
2963 const char *const *p = usage_msgd;
2964 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2967 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2968 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2969 "-Dp not implemented on this platform\n");
2975 /* This routine handles any switches that can be given during run */
2978 Perl_moreswitches(pTHX_ char *s)
2989 SvREFCNT_dec(PL_rs);
2990 if (s[1] == 'x' && s[2]) {
2991 const char *e = s+=2;
2997 flags = PERL_SCAN_SILENT_ILLDIGIT;
2998 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2999 if (s + numlen < e) {
3000 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3004 PL_rs = newSVpvs("");
3005 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3006 tmps = (U8*)SvPVX(PL_rs);
3007 uvchr_to_utf8(tmps, rschar);
3008 SvCUR_set(PL_rs, UNISKIP(rschar));
3013 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3014 if (rschar & ~((U8)~0))
3015 PL_rs = &PL_sv_undef;
3016 else if (!rschar && numlen >= 2)
3017 PL_rs = newSVpvs("");
3019 char ch = (char)rschar;
3020 PL_rs = newSVpvn(&ch, 1);
3023 sv_setsv(get_sv("/", TRUE), PL_rs);
3028 PL_unicode = parse_unicode_opts( (const char **)&s );
3029 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3035 while (*s && !isSPACE(*s)) ++s;
3036 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3047 forbid_setid('d', -1);
3050 /* -dt indicates to the debugger that threads will be used */
3051 if (*s == 't' && !isALNUM(s[1])) {
3053 my_setenv("PERL5DB_THREADED", "1");
3056 /* The following permits -d:Mod to accepts arguments following an =
3057 in the fashion that -MSome::Mod does. */
3058 if (*s == ':' || *s == '=') {
3060 SV * const sv = newSVpvs("use Devel::");
3062 /* We now allow -d:Module=Foo,Bar */
3063 while(isALNUM(*s) || *s==':') ++s;
3065 sv_catpv(sv, start);
3067 sv_catpvn(sv, start, s-start);
3068 /* Don't use NUL as q// delimiter here, this string goes in the
3070 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3073 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3076 PL_perldb = PERLDB_ALL;
3083 forbid_setid('D', -1);
3085 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3086 #else /* !DEBUGGING */
3087 if (ckWARN_d(WARN_DEBUGGING))
3088 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3089 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3090 for (s++; isALNUM(*s); s++) ;
3095 usage(PL_origargv[0]);
3098 Safefree(PL_inplace);
3099 #if defined(__CYGWIN__) /* do backup extension automagically */
3100 if (*(s+1) == '\0') {
3101 PL_inplace = savepvs(".bak");
3104 #endif /* __CYGWIN__ */
3106 const char * const start = ++s;
3107 while (*s && !isSPACE(*s))
3110 PL_inplace = savepvn(start, s - start);
3114 if (*s == '-') /* Additional switches on #! line. */
3118 case 'I': /* -I handled both here and in parse_body() */
3119 forbid_setid('I', -1);
3121 while (*s && isSPACE(*s))
3126 /* ignore trailing spaces (possibly followed by other switches) */
3128 for (e = p; *e && !isSPACE(*e); e++) ;
3132 } while (*p && *p != '-');
3133 e = savepvn(s, e-s);
3134 incpush(e, TRUE, TRUE, FALSE, FALSE);
3141 Perl_croak(aTHX_ "No directory specified for -I");
3147 SvREFCNT_dec(PL_ors_sv);
3153 PL_ors_sv = newSVpvs("\n");
3154 numlen = 3 + (*s == '0');
3155 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3159 if (RsPARA(PL_rs)) {
3160 PL_ors_sv = newSVpvs("\n\n");
3163 PL_ors_sv = newSVsv(PL_rs);
3168 forbid_setid('A', -1);
3170 PL_preambleav = newAV();
3173 char * const start = s;
3174 SV * const sv = newSVpvs("use assertions::activate");
3175 while(isALNUM(*s) || *s == ':') ++s;
3177 sv_catpvs(sv, "::");
3178 sv_catpvn(sv, start, s-start);
3181 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3184 else if (*s != '\0') {
3185 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3187 av_push(PL_preambleav, sv);
3191 forbid_setid('M', -1); /* XXX ? */
3194 forbid_setid('m', -1); /* XXX ? */
3198 const char *use = "use ";
3199 /* -M-foo == 'no foo' */
3200 /* Leading space on " no " is deliberate, to make both
3201 possibilities the same length. */
3202 if (*s == '-') { use = " no "; ++s; }
3203 sv = newSVpvn(use,4);
3205 /* We allow -M'Module qw(Foo Bar)' */
3206 while(isALNUM(*s) || *s==':') ++s;
3208 sv_catpv(sv, start);
3209 if (*(start-1) == 'm') {
3211 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3212 sv_catpvs( sv, " ()");
3216 Perl_croak(aTHX_ "Module name required with -%c option",
3218 sv_catpvn(sv, start, s-start);
3219 sv_catpvs(sv, " split(/,/,q");
3220 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3222 sv_catpvs(sv, "\0)");
3226 PL_preambleav = newAV();
3227 av_push(PL_preambleav, sv);
3230 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3241 forbid_setid('s', -1);
3242 PL_doswitches = TRUE;
3256 #ifdef MACOS_TRADITIONAL
3257 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3259 PL_do_undump = TRUE;
3267 if (!sv_derived_from(PL_patchlevel, "version"))
3268 upg_version(PL_patchlevel);
3270 PerlIO_printf(PerlIO_stdout(),
3271 Perl_form(aTHX_ "\nThis is perl, %"SVf
3272 #ifdef PERL_PATCHNUM
3273 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3276 SVfARG(vstringify(PL_patchlevel)),
3279 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3280 PerlIO_printf(PerlIO_stdout(),
3281 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3282 SVfARG(vstringify(PL_patchlevel))));
3283 PerlIO_printf(PerlIO_stdout(),
3284 Perl_form(aTHX_ " built under %s at %s %s\n",
3285 OSNAME, __DATE__, __TIME__));
3286 PerlIO_printf(PerlIO_stdout(),
3287 Perl_form(aTHX_ " OS Specific Release: %s\n",
3291 #if defined(LOCAL_PATCH_COUNT)
3292 if (LOCAL_PATCH_COUNT > 0)
3293 PerlIO_printf(PerlIO_stdout(),
3294 "\n(with %d registered patch%s, "
3295 "see perl -V for more detail)",
3297 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "\n\nCopyright 1987-2007, Larry Wall\n");
3302 #ifdef MACOS_TRADITIONAL
3303 PerlIO_printf(PerlIO_stdout(),
3304 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3305 "maintained by Chris Nandor\n");
3308 PerlIO_printf(PerlIO_stdout(),
3309 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3312 PerlIO_printf(PerlIO_stdout(),
3313 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3314 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3319 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "atariST series port, ++jrb bammi@cadence.com\n");
3326 PerlIO_printf(PerlIO_stdout(),
3327 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3330 PerlIO_printf(PerlIO_stdout(),
3331 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3334 PerlIO_printf(PerlIO_stdout(),
3335 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "MiNT port by Guido Flohr, 1997-1999\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "EPOC port by Olaf Flebbe, 1999-2002\n");
3358 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3359 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3362 #ifdef __SYMBIAN32__
3363 PerlIO_printf(PerlIO_stdout(),
3364 "Symbian port by Nokia, 2004-2005\n");
3366 #ifdef BINARY_BUILD_NOTICE
3367 BINARY_BUILD_NOTICE;
3369 PerlIO_printf(PerlIO_stdout(),
3371 Perl may be copied only under the terms of either the Artistic License or the\n\
3372 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3373 Complete documentation for Perl, including FAQ lists, should be found on\n\
3374 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3375 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3378 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3379 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: