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);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
184 #ifdef PERL_IMPLICIT_SYS
186 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
187 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
188 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
189 struct IPerlDir* ipD, struct IPerlSock* ipS,
190 struct IPerlProc* ipP)
192 PerlInterpreter *my_perl;
193 /* Newx() needs interpreter, so call malloc() instead */
194 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 Zero(my_perl, 1, PerlInterpreter);
206 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
213 =head1 Embedding Functions
215 =for apidoc perl_alloc
217 Allocates a new Perl interpreter. See L<perlembed>.
225 PerlInterpreter *my_perl;
227 /* Newx() needs interpreter, so call malloc() instead */
228 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
230 S_init_tls_and_interp(my_perl);
231 #ifndef PERL_TRACK_MEMPOOL
232 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
234 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
239 #endif /* PERL_IMPLICIT_SYS */
242 =for apidoc perl_construct
244 Initializes a new Perl interpreter. See L<perlembed>.
250 perl_construct(pTHXx)
253 PERL_UNUSED_ARG(my_perl);
256 PL_perl_destruct_level = 1;
258 if (PL_perl_destruct_level > 0)
261 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
263 /* set read-only and try to insure than we wont see REFCNT==0
266 SvREADONLY_on(&PL_sv_undef);
267 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
269 sv_setpv(&PL_sv_no,PL_No);
270 /* value lookup in void context - happens to have the side effect
271 of caching the numeric forms. */
274 SvREADONLY_on(&PL_sv_no);
275 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
277 sv_setpv(&PL_sv_yes,PL_Yes);
280 SvREADONLY_on(&PL_sv_yes);
281 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
283 SvREADONLY_on(&PL_sv_placeholder);
284 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
286 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
287 #ifdef PERL_USES_PL_PIDSTATUS
288 PL_pidstatus = newHV();
291 PL_rs = newSVpvs("\n");
296 PL_lex_state = LEX_NOTPARSING;
302 SET_NUMERIC_STANDARD();
304 #if defined(LOCAL_PATCH_COUNT)
305 PL_localpatches = local_patches; /* For possible -v */
308 #ifdef HAVE_INTERP_INTERN
312 PerlIO_init(aTHX); /* Hook to IO system */
314 PL_fdpid = newAV(); /* for remembering popen pids by fd */
315 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
316 PL_errors = newSVpvs("");
317 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
318 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
319 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
321 /* First entry is an array of empty elements */
322 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
323 PL_regex_pad = AvARRAY(PL_regex_padav);
325 #ifdef USE_REENTRANT_API
326 Perl_reentrant_init(aTHX);
329 /* Note that strtab is a rather special HV. Assumptions are made
330 about not iterating on it, and not adding tie magic to it.
331 It is properly deallocated in perl_destruct() */
334 HvSHAREKEYS_off(PL_strtab); /* mandatory */
335 hv_ksplit(PL_strtab, 512);
337 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
338 _dyld_lookup_and_bind
339 ("__environ", (unsigned long *) &environ_pointer, NULL);
343 # ifdef USE_ENVIRON_ARRAY
344 PL_origenviron = environ;
348 /* Use sysconf(_SC_CLK_TCK) if available, if not
349 * available or if the sysconf() fails, use the HZ.
350 * BeOS has those, but returns the wrong value.
351 * The HZ if not originally defined has been by now
352 * been defined as CLK_TCK, if available. */
353 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
354 PL_clocktick = sysconf(_SC_CLK_TCK);
355 if (PL_clocktick <= 0)
359 PL_stashcache = newHV();
361 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
362 (int)PERL_VERSION, (int)PERL_SUBVERSION);
365 if (!PL_mmap_page_size) {
366 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
368 SETERRNO(0, SS_NORMAL);
370 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
372 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
374 if ((long) PL_mmap_page_size < 0) {
376 SV * const error = ERRSV;
377 SvUPGRADE(error, SVt_PV);
378 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
381 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
385 # ifdef HAS_GETPAGESIZE
386 PL_mmap_page_size = getpagesize();
388 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
389 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
393 if (PL_mmap_page_size <= 0)
394 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
395 (IV) PL_mmap_page_size);
397 #endif /* HAS_MMAP */
399 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
400 PL_timesbase.tms_utime = 0;
401 PL_timesbase.tms_stime = 0;
402 PL_timesbase.tms_cutime = 0;
403 PL_timesbase.tms_cstime = 0;
410 =for apidoc nothreadhook
412 Stub that provides thread hook for perl_destruct when there are
419 Perl_nothreadhook(pTHX)
425 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
427 Perl_dump_sv_child(pTHX_ SV *sv)
430 const int sock = PL_dumper_fd;
431 const int debug_fd = PerlIO_fileno(Perl_debug_log);
432 union control_un control;
435 struct cmsghdr *cmptr;
437 unsigned char buffer[256];
439 if(sock == -1 || debug_fd == -1)
442 PerlIO_flush(Perl_debug_log);
444 /* All these shenanigans are to pass a file descriptor over to our child for
445 it to dump out to. We can't let it hold open the file descriptor when it
446 forks, as the file descriptor it will dump to can turn out to be one end
447 of pipe that some other process will wait on for EOF. (So as it would
448 be open, the wait would be forever.) */
450 msg.msg_control = control.control;
451 msg.msg_controllen = sizeof(control.control);
452 /* We're a connected socket so we don't need a destination */
458 cmptr = CMSG_FIRSTHDR(&msg);
459 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
460 cmptr->cmsg_level = SOL_SOCKET;
461 cmptr->cmsg_type = SCM_RIGHTS;
462 *((int *)CMSG_DATA(cmptr)) = 1;
464 vec[0].iov_base = (void*)&sv;
465 vec[0].iov_len = sizeof(sv);
466 got = sendmsg(sock, &msg, 0);
469 perror("Debug leaking scalars parent sendmsg failed");
472 if(got < sizeof(sv)) {
473 perror("Debug leaking scalars parent short sendmsg");
477 /* Return protocol is
479 unsigned char: length of location string (0 for empty)
480 unsigned char*: string (not terminated)
482 vec[0].iov_base = (void*)&returned_errno;
483 vec[0].iov_len = sizeof(returned_errno);
484 vec[1].iov_base = buffer;
487 got = readv(sock, vec, 2);
490 perror("Debug leaking scalars parent read failed");
491 PerlIO_flush(PerlIO_stderr());
494 if(got < sizeof(returned_errno) + 1) {
495 perror("Debug leaking scalars parent short read");
496 PerlIO_flush(PerlIO_stderr());
501 got = read(sock, buffer + 1, *buffer);
503 perror("Debug leaking scalars parent read 2 failed");
504 PerlIO_flush(PerlIO_stderr());
509 perror("Debug leaking scalars parent short read 2");
510 PerlIO_flush(PerlIO_stderr());
515 if (returned_errno || *buffer) {
516 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
517 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
518 returned_errno, strerror(returned_errno));
524 =for apidoc perl_destruct
526 Shuts down a Perl interpreter. See L<perlembed>.
535 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
537 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
541 PERL_UNUSED_ARG(my_perl);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c)
565 call_list(PL_scopestack_ix, PL_endav);
571 /* Need to flush since END blocks can produce output */
574 if (CALL_FPTR(PL_threadhook)(aTHX)) {
575 /* Threads hook has vetoed further cleanup */
576 PL_veto_cleanup = TRUE;
580 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
581 if (destruct_level != 0) {
582 /* Fork here to create a child. Our child's job is to preserve the
583 state of scalars prior to destruction, so that we can instruct it
584 to dump any scalars that we later find have leaked.
585 There's no subtlety in this code - it assumes POSIX, and it doesn't
589 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
590 perror("Debug leaking scalars socketpair failed");
596 perror("Debug leaking scalars fork failed");
600 /* We are the child */
601 const int sock = fd[1];
602 const int debug_fd = PerlIO_fileno(Perl_debug_log);
605 /* Our success message is an integer 0, and a char 0 */
606 static const char success[sizeof(int) + 1];
610 /* We need to close all other file descriptors otherwise we end up
611 with interesting hangs, where the parent closes its end of a
612 pipe, and sits waiting for (another) child to terminate. Only
613 that child never terminates, because it never gets EOF, because
614 we also have the far end of the pipe open. We even need to
615 close the debugging fd, because sometimes it happens to be one
616 end of a pipe, and a process is waiting on the other end for
617 EOF. Normally it would be closed at some point earlier in
618 destruction, but if we happen to cause the pipe to remain open,
619 EOF never occurs, and we get an infinite hang. Hence all the
620 games to pass in a file descriptor if it's actually needed. */
622 f = sysconf(_SC_OPEN_MAX);
624 where = "sysconf failed";
635 union control_un control;
638 struct cmsghdr *cmptr;
642 msg.msg_control = control.control;
643 msg.msg_controllen = sizeof(control.control);
644 /* We're a connected socket so we don't need a source */
648 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
650 vec[0].iov_base = (void*)⌖
651 vec[0].iov_len = sizeof(target);
653 got = recvmsg(sock, &msg, 0);
658 where = "recv failed";
661 if(got < sizeof(target)) {
662 where = "short recv";
666 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
670 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
671 where = "wrong cmsg_len";
674 if(cmptr->cmsg_level != SOL_SOCKET) {
675 where = "wrong cmsg_level";
678 if(cmptr->cmsg_type != SCM_RIGHTS) {
679 where = "wrong cmsg_type";
683 got_fd = *(int*)CMSG_DATA(cmptr);
684 /* For our last little bit of trickery, put the file descriptor
685 back into Perl_debug_log, as if we never actually closed it
687 if(got_fd != debug_fd) {
688 if (dup2(got_fd, debug_fd) == -1) {
695 PerlIO_flush(Perl_debug_log);
697 got = write(sock, &success, sizeof(success));
700 where = "write failed";
703 if(got < sizeof(success)) {
704 where = "short write";
711 int send_errno = errno;
712 unsigned char length = (unsigned char) strlen(where);
713 struct iovec failure[3] = {
714 {(void*)&send_errno, sizeof(send_errno)},
716 {(void*)where, length}
718 int got = writev(sock, failure, 3);
719 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
720 in the parent if we try to read from the socketpair after the
721 child has exited, even if there was data to read.
722 So sleep a bit to give the parent a fighting chance of
725 _exit((got == -1) ? errno : 0);
729 PL_dumper_fd = fd[0];
734 /* We must account for everything. */
736 /* Destroy the main CV and syntax tree */
737 /* Do this now, because destroying ops can cause new SVs to be generated
738 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
739 PL_curcop to point to a valid op from which the filename structure
741 PL_curcop = &PL_compiling;
743 /* ensure comppad/curpad to refer to main's pad */
744 if (CvPADLIST(PL_main_cv)) {
745 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
747 op_free(PL_main_root);
750 PL_main_start = NULL;
751 SvREFCNT_dec(PL_main_cv);
755 /* Tell PerlIO we are about to tear things apart in case
756 we have layers which are using resources that should
760 PerlIO_destruct(aTHX);
762 if (PL_sv_objcount) {
764 * Try to destruct global references. We do this first so that the
765 * destructors and destructees still exist. Some sv's might remain.
766 * Non-referenced objects are on their own.
770 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
771 PL_defoutgv = NULL; /* may have been freed */
774 /* unhook hooks which will soon be, or use, destroyed data */
775 SvREFCNT_dec(PL_warnhook);
777 SvREFCNT_dec(PL_diehook);
780 /* call exit list functions */
781 while (PL_exitlistlen-- > 0)
782 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
784 Safefree(PL_exitlist);
789 /* jettison our possibly duplicated environment */
790 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
791 * so we certainly shouldn't free it here
794 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
795 if (environ != PL_origenviron && !PL_use_safe_putenv
797 /* only main thread can free environ[0] contents */
798 && PL_curinterp == aTHX
804 for (i = 0; environ[i]; i++)
805 safesysfree(environ[i]);
807 /* Must use safesysfree() when working with environ. */
808 safesysfree(environ);
810 environ = PL_origenviron;
813 #endif /* !PERL_MICRO */
815 if (destruct_level == 0) {
817 DEBUG_P(debprofdump());
819 #if defined(PERLIO_LAYERS)
820 /* No more IO - including error messages ! */
821 PerlIO_cleanup(aTHX);
824 CopFILE_free(&PL_compiling);
825 CopSTASH_free(&PL_compiling);
827 /* The exit() function will do everything that needs doing. */
831 /* reset so print() ends up where we expect */
835 /* the syntax tree is shared between clones
836 * so op_free(PL_main_root) only ReREFCNT_dec's
837 * REGEXPs in the parent interpreter
838 * we need to manually ReREFCNT_dec for the clones
841 I32 i = AvFILLp(PL_regex_padav) + 1;
842 SV * const * const ary = AvARRAY(PL_regex_padav);
845 SV * const resv = ary[--i];
847 if (SvFLAGS(resv) & SVf_BREAK) {
848 /* this is PL_reg_curpm, already freed
849 * flag is set in regexec.c:S_regtry
851 SvFLAGS(resv) &= ~SVf_BREAK;
853 else if(SvREPADTMP(resv)) {
854 SvREPADTMP_off(resv);
856 else if(SvIOKp(resv)) {
857 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
862 SvREFCNT_dec(PL_regex_padav);
863 PL_regex_padav = NULL;
867 SvREFCNT_dec((SV*) PL_stashcache);
868 PL_stashcache = NULL;
870 /* loosen bonds of global variables */
873 (void)PerlIO_close(PL_rsfp);
877 /* Filters for program text */
878 SvREFCNT_dec(PL_rsfp_filters);
879 PL_rsfp_filters = NULL;
882 Safefree(PL_splitstr);
887 PL_preprocess = FALSE;
893 PL_doswitches = FALSE;
894 PL_dowarn = G_WARN_OFF;
895 PL_doextract = FALSE;
896 PL_sawampersand = FALSE; /* must save all match strings */
899 Safefree(PL_inplace);
901 SvREFCNT_dec(PL_patchlevel);
904 SvREFCNT_dec(PL_e_script);
910 /* magical thingies */
912 SvREFCNT_dec(PL_ofs_sv); /* $, */
915 SvREFCNT_dec(PL_ors_sv); /* $\ */
918 SvREFCNT_dec(PL_rs); /* $/ */
921 Safefree(PL_osname); /* $^O */
924 SvREFCNT_dec(PL_statname);
928 /* defgv, aka *_ should be taken care of elsewhere */
930 /* clean up after study() */
931 SvREFCNT_dec(PL_lastscream);
932 PL_lastscream = NULL;
933 Safefree(PL_screamfirst);
935 Safefree(PL_screamnext);
939 Safefree(PL_efloatbuf);
943 /* startup and shutdown function lists */
944 SvREFCNT_dec(PL_beginav);
945 SvREFCNT_dec(PL_beginav_save);
946 SvREFCNT_dec(PL_endav);
947 SvREFCNT_dec(PL_checkav);
948 SvREFCNT_dec(PL_checkav_save);
949 SvREFCNT_dec(PL_unitcheckav);
950 SvREFCNT_dec(PL_unitcheckav_save);
951 SvREFCNT_dec(PL_initav);
953 PL_beginav_save = NULL;
956 PL_checkav_save = NULL;
957 PL_unitcheckav = NULL;
958 PL_unitcheckav_save = NULL;
961 /* shortcuts just get cleared */
970 PL_last_in_gv = NULL;
978 PL_DBassertion = NULL;
983 SvREFCNT_dec(PL_argvout_stack);
984 PL_argvout_stack = NULL;
986 SvREFCNT_dec(PL_modglobal);
988 SvREFCNT_dec(PL_preambleav);
989 PL_preambleav = NULL;
990 SvREFCNT_dec(PL_subname);
992 #ifdef PERL_USES_PL_PIDSTATUS
993 SvREFCNT_dec(PL_pidstatus);
996 SvREFCNT_dec(PL_toptarget);
998 SvREFCNT_dec(PL_bodytarget);
999 PL_bodytarget = NULL;
1000 PL_formtarget = NULL;
1002 /* free locale stuff */
1003 #ifdef USE_LOCALE_COLLATE
1004 Safefree(PL_collation_name);
1005 PL_collation_name = NULL;
1008 #ifdef USE_LOCALE_NUMERIC
1009 Safefree(PL_numeric_name);
1010 PL_numeric_name = NULL;
1011 SvREFCNT_dec(PL_numeric_radix_sv);
1012 PL_numeric_radix_sv = NULL;
1015 /* clear utf8 character classes */
1016 SvREFCNT_dec(PL_utf8_alnum);
1017 SvREFCNT_dec(PL_utf8_alnumc);
1018 SvREFCNT_dec(PL_utf8_ascii);
1019 SvREFCNT_dec(PL_utf8_alpha);
1020 SvREFCNT_dec(PL_utf8_space);
1021 SvREFCNT_dec(PL_utf8_cntrl);
1022 SvREFCNT_dec(PL_utf8_graph);
1023 SvREFCNT_dec(PL_utf8_digit);
1024 SvREFCNT_dec(PL_utf8_upper);
1025 SvREFCNT_dec(PL_utf8_lower);
1026 SvREFCNT_dec(PL_utf8_print);
1027 SvREFCNT_dec(PL_utf8_punct);
1028 SvREFCNT_dec(PL_utf8_xdigit);
1029 SvREFCNT_dec(PL_utf8_mark);
1030 SvREFCNT_dec(PL_utf8_toupper);
1031 SvREFCNT_dec(PL_utf8_totitle);
1032 SvREFCNT_dec(PL_utf8_tolower);
1033 SvREFCNT_dec(PL_utf8_tofold);
1034 SvREFCNT_dec(PL_utf8_idstart);
1035 SvREFCNT_dec(PL_utf8_idcont);
1036 PL_utf8_alnum = NULL;
1037 PL_utf8_alnumc = NULL;
1038 PL_utf8_ascii = NULL;
1039 PL_utf8_alpha = NULL;
1040 PL_utf8_space = NULL;
1041 PL_utf8_cntrl = NULL;
1042 PL_utf8_graph = NULL;
1043 PL_utf8_digit = NULL;
1044 PL_utf8_upper = NULL;
1045 PL_utf8_lower = NULL;
1046 PL_utf8_print = NULL;
1047 PL_utf8_punct = NULL;
1048 PL_utf8_xdigit = NULL;
1049 PL_utf8_mark = NULL;
1050 PL_utf8_toupper = NULL;
1051 PL_utf8_totitle = NULL;
1052 PL_utf8_tolower = NULL;
1053 PL_utf8_tofold = NULL;
1054 PL_utf8_idstart = NULL;
1055 PL_utf8_idcont = NULL;
1057 if (!specialWARN(PL_compiling.cop_warnings))
1058 PerlMemShared_free(PL_compiling.cop_warnings);
1059 PL_compiling.cop_warnings = NULL;
1060 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1061 PL_compiling.cop_hints_hash = NULL;
1062 CopFILE_free(&PL_compiling);
1063 CopSTASH_free(&PL_compiling);
1065 /* Prepare to destruct main symbol table. */
1070 SvREFCNT_dec(PL_curstname);
1071 PL_curstname = NULL;
1073 /* clear queued errors */
1074 SvREFCNT_dec(PL_errors);
1077 SvREFCNT_dec(PL_isarev);
1080 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1081 if (PL_scopestack_ix != 0)
1082 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1083 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1084 (long)PL_scopestack_ix);
1085 if (PL_savestack_ix != 0)
1086 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1087 "Unbalanced saves: %ld more saves than restores\n",
1088 (long)PL_savestack_ix);
1089 if (PL_tmps_floor != -1)
1090 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1091 (long)PL_tmps_floor + 1);
1092 if (cxstack_ix != -1)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1094 (long)cxstack_ix + 1);
1097 /* Now absolutely destruct everything, somehow or other, loops or no. */
1098 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1099 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1101 /* the 2 is for PL_fdpid and PL_strtab */
1102 while (PL_sv_count > 2 && sv_clean_all())
1105 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1106 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1107 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1108 SvFLAGS(PL_strtab) |= SVt_PVHV;
1110 AvREAL_off(PL_fdpid); /* no surviving entries */
1111 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1114 #ifdef HAVE_INTERP_INTERN
1118 /* Destruct the global string table. */
1120 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1121 * so that sv_free() won't fail on them.
1122 * Now that the global string table is using a single hunk of memory
1123 * for both HE and HEK, we either need to explicitly unshare it the
1124 * correct way, or actually free things here.
1127 const I32 max = HvMAX(PL_strtab);
1128 HE * const * const array = HvARRAY(PL_strtab);
1129 HE *hent = array[0];
1132 if (hent && ckWARN_d(WARN_INTERNAL)) {
1133 HE * const next = HeNEXT(hent);
1134 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1135 "Unbalanced string table refcount: (%ld) for \"%s\"",
1136 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1143 hent = array[riter];
1148 HvARRAY(PL_strtab) = 0;
1149 HvTOTALKEYS(PL_strtab) = 0;
1150 HvFILL(PL_strtab) = 0;
1152 SvREFCNT_dec(PL_strtab);
1155 /* free the pointer tables used for cloning */
1156 ptr_table_free(PL_ptr_table);
1157 PL_ptr_table = (PTR_TBL_t*)NULL;
1160 /* free special SVs */
1162 SvREFCNT(&PL_sv_yes) = 0;
1163 sv_clear(&PL_sv_yes);
1164 SvANY(&PL_sv_yes) = NULL;
1165 SvFLAGS(&PL_sv_yes) = 0;
1167 SvREFCNT(&PL_sv_no) = 0;
1168 sv_clear(&PL_sv_no);
1169 SvANY(&PL_sv_no) = NULL;
1170 SvFLAGS(&PL_sv_no) = 0;
1174 for (i=0; i<=2; i++) {
1175 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1176 sv_clear(PERL_DEBUG_PAD(i));
1177 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1178 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1182 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1183 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1185 #ifdef DEBUG_LEAKING_SCALARS
1186 if (PL_sv_count != 0) {
1191 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1192 svend = &sva[SvREFCNT(sva)];
1193 for (sv = sva + 1; sv < svend; ++sv) {
1194 if (SvTYPE(sv) != SVTYPEMASK) {
1195 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1197 " refcnt=%"UVuf pTHX__FORMAT "\n"
1198 "\tallocated at %s:%d %s %s%s\n",
1199 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1200 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1202 sv->sv_debug_inpad ? "for" : "by",
1203 sv->sv_debug_optype ?
1204 PL_op_name[sv->sv_debug_optype]: "(none)",
1205 sv->sv_debug_cloned ? " (cloned)" : ""
1207 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1208 Perl_dump_sv_child(aTHX_ sv);
1214 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1218 /* Wait for up to 4 seconds for child to terminate.
1219 This seems to be the least effort way of timing out on reaping
1221 struct timeval waitfor = {4, 0};
1222 int sock = PL_dumper_fd;
1226 FD_SET(sock, &rset);
1227 select(sock + 1, &rset, NULL, NULL, &waitfor);
1228 waitpid(child, &status, WNOHANG);
1235 #ifdef PERL_DEBUG_READONLY_OPS
1241 #if defined(PERLIO_LAYERS)
1242 /* No more IO - including error messages ! */
1243 PerlIO_cleanup(aTHX);
1246 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1247 as currently layers use it rather than NULL as a marker
1248 for no arg - and will try and SvREFCNT_dec it.
1250 SvREFCNT(&PL_sv_undef) = 0;
1251 SvREADONLY_off(&PL_sv_undef);
1253 Safefree(PL_origfilename);
1254 PL_origfilename = NULL;
1255 Safefree(PL_reg_start_tmp);
1256 PL_reg_start_tmp = (char**)NULL;
1257 PL_reg_start_tmpl = 0;
1258 Safefree(PL_reg_curpm);
1259 Safefree(PL_reg_poscache);
1260 free_tied_hv_pool();
1261 Safefree(PL_op_mask);
1262 Safefree(PL_psig_ptr);
1263 PL_psig_ptr = (SV**)NULL;
1264 Safefree(PL_psig_name);
1265 PL_psig_name = (SV**)NULL;
1266 Safefree(PL_bitcount);
1268 Safefree(PL_psig_pend);
1269 PL_psig_pend = (int*)NULL;
1272 PL_tainting = FALSE;
1273 PL_taint_warn = FALSE;
1274 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1277 DEBUG_P(debprofdump());
1279 #ifdef USE_REENTRANT_API
1280 Perl_reentrant_free(aTHX);
1285 while (PL_regmatch_slab) {
1286 regmatch_slab *s = PL_regmatch_slab;
1287 PL_regmatch_slab = PL_regmatch_slab->next;
1291 /* As the absolutely last thing, free the non-arena SV for mess() */
1294 /* we know that type == SVt_PVMG */
1296 /* it could have accumulated taint magic */
1299 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1300 moremagic = mg->mg_moremagic;
1301 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1303 Safefree(mg->mg_ptr);
1307 /* we know that type >= SVt_PV */
1308 SvPV_free(PL_mess_sv);
1309 Safefree(SvANY(PL_mess_sv));
1310 Safefree(PL_mess_sv);
1317 =for apidoc perl_free
1319 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)))
1553 #ifndef PERL_USE_SAFE_PUTENV
1554 /* Can we grab env area too to be used as the area for $0? */
1555 if (s && PL_origenviron && !PL_use_safe_putenv) {
1556 if ((PL_origenviron[0] == s + 1)
1559 (PL_origenviron[0] > s &&
1560 PL_origenviron[0] <=
1561 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1564 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1565 s = PL_origenviron[0];
1568 my_setenv("NoNe SuCh", NULL);
1569 /* Force copy of environment. */
1570 for (i = 1; PL_origenviron[i]; i++) {
1571 if (PL_origenviron[i] == s + 1
1574 (PL_origenviron[i] > s &&
1575 PL_origenviron[i] <=
1576 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1579 s = PL_origenviron[i];
1587 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1589 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1594 /* Come here if running an undumped a.out. */
1596 PL_origfilename = savepv(argv[0]);
1597 PL_do_undump = FALSE;
1598 cxstack_ix = -1; /* start label stack again */
1600 assert (!PL_tainted);
1602 S_set_caret_X(aTHX);
1604 init_postdump_symbols(argc,argv,env);
1609 op_free(PL_main_root);
1610 PL_main_root = NULL;
1612 PL_main_start = NULL;
1613 SvREFCNT_dec(PL_main_cv);
1617 oldscope = PL_scopestack_ix;
1618 PL_dowarn = G_WARN_OFF;
1623 parse_body(env,xsinit);
1625 call_list(oldscope, PL_unitcheckav);
1627 call_list(oldscope, PL_checkav);
1634 /* my_exit() was called */
1635 while (PL_scopestack_ix > oldscope)
1638 PL_curstash = PL_defstash;
1640 call_list(oldscope, PL_unitcheckav);
1642 call_list(oldscope, PL_checkav);
1646 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1655 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1659 int argc = PL_origargc;
1660 char **argv = PL_origargv;
1661 const char *scriptname = NULL;
1662 VOL bool dosearch = FALSE;
1663 const char *validarg = "";
1665 register char *s, c;
1666 const char *cddir = NULL;
1667 #ifdef USE_SITECUSTOMIZE
1668 bool minus_f = FALSE;
1670 SV *linestr_sv = newSV_type(SVt_PVIV);
1672 SvGROW(linestr_sv, 80);
1673 sv_setpvn(linestr_sv,"",0);
1675 sv = newSVpvs(""); /* first used for -I flags */
1679 for (argc--,argv++; argc > 0; argc--,argv++) {
1680 if (argv[0][0] != '-' || !argv[0][1])
1684 validarg = " PHOOEY ";
1688 * Can we rely on the kernel to start scripts with argv[1] set to
1689 * contain all #! line switches (the whole line)? (argv[0] is set to
1690 * the interpreter name, argv[2] to the script name; argv[3] and
1691 * above may contain other arguments.)
1698 #ifndef PERL_STRICT_CR
1723 if ((s = moreswitches(s)))
1728 CHECK_MALLOC_TOO_LATE_FOR('t');
1729 if( !PL_tainting ) {
1730 PL_taint_warn = TRUE;
1736 CHECK_MALLOC_TOO_LATE_FOR('T');
1738 PL_taint_warn = FALSE;
1746 #ifdef MACOS_TRADITIONAL
1747 /* ignore -e for Dev:Pseudo argument */
1748 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1751 forbid_setid('e', -1);
1753 PL_e_script = newSVpvs("");
1754 filter_add(read_e_script, NULL);
1757 sv_catpv(PL_e_script, s);
1759 sv_catpv(PL_e_script, argv[1]);
1763 Perl_croak(aTHX_ "No code specified for -%c", c);
1764 sv_catpvs(PL_e_script, "\n");
1768 #ifdef USE_SITECUSTOMIZE
1774 case 'I': /* -I handled both here and in moreswitches() */
1775 forbid_setid('I', -1);
1776 if (!*++s && (s=argv[1]) != NULL) {
1780 STRLEN len = strlen(s);
1781 const char * const p = savepvn(s, len);
1782 incpush(p, TRUE, TRUE, FALSE, FALSE);
1783 sv_catpvs(sv, "-I");
1784 sv_catpvn(sv, p, len);
1789 Perl_croak(aTHX_ "No directory specified for -I");
1792 forbid_setid('P', -1);
1793 PL_preprocess = TRUE;
1797 forbid_setid('S', -1);
1805 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1809 opts_prog = newSVpvs("print Config::myconfig(),");
1811 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1813 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1815 opts = SvCUR(opts_prog);
1817 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1821 # ifdef DEBUG_LEAKING_SCALARS
1822 " DEBUG_LEAKING_SCALARS"
1824 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1825 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1827 # ifdef FAKE_THREADS
1830 # ifdef MULTIPLICITY
1839 # ifdef PERL_DEBUG_READONLY_OPS
1840 " PERL_DEBUG_READONLY_OPS"
1842 # ifdef PERL_DONT_CREATE_GVSV
1843 " PERL_DONT_CREATE_GVSV"
1845 # ifdef PERL_GLOBAL_STRUCT
1846 " PERL_GLOBAL_STRUCT"
1848 # ifdef PERL_IMPLICIT_CONTEXT
1849 " PERL_IMPLICIT_CONTEXT"
1851 # ifdef PERL_IMPLICIT_SYS
1852 " PERL_IMPLICIT_SYS"
1857 # ifdef PERL_MALLOC_WRAP
1860 # ifdef PERL_MEM_LOG
1863 # ifdef PERL_MEM_LOG_ENV
1866 # ifdef PERL_MEM_LOG_ENV_FD
1867 " PERL_MEM_LOG_ENV_FD"
1869 # ifdef PERL_MEM_LOG_STDERR
1870 " PERL_MEM_LOG_STDERR"
1872 # ifdef PERL_MEM_LOG_TIMESTAMP
1873 " PERL_MEM_LOG_TIMESTAMP"
1875 # ifdef PERL_NEED_APPCTX
1878 # ifdef PERL_NEED_TIMESBASE
1879 " PERL_NEED_TIMESBASE"
1881 # ifdef PERL_OLD_COPY_ON_WRITE
1882 " PERL_OLD_COPY_ON_WRITE"
1887 # ifdef PERL_TRACK_MEMPOOL
1888 " PERL_TRACK_MEMPOOL"
1890 # ifdef PERL_USE_SAFE_PUTENV
1891 " PERL_USE_SAFE_PUTENV"
1893 # ifdef PERL_USES_PL_PIDSTATUS
1894 " PERL_USES_PL_PIDSTATUS"
1896 # ifdef PL_OP_SLAB_ALLOC
1899 # ifdef THREADS_HAVE_PIDS
1900 " THREADS_HAVE_PIDS"
1902 # ifdef USE_64_BIT_ALL
1905 # ifdef USE_64_BIT_INT
1908 # ifdef USE_ITHREADS
1911 # ifdef USE_LARGE_FILES
1914 # ifdef USE_LONG_DOUBLE
1920 # ifdef USE_REENTRANT_API
1921 " USE_REENTRANT_API"
1926 # ifdef USE_SITECUSTOMIZE
1927 " USE_SITECUSTOMIZE"
1934 while (SvCUR(opts_prog) > opts+76) {
1935 /* find last space after "options: " and before col 76
1939 char * const pv = SvPV_nolen(opts_prog);
1940 const char c = pv[opts+76];
1942 space = strrchr(pv+opts+26, ' ');
1944 if (!space) break; /* "Can't happen" */
1946 /* break the line before that space */
1949 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1950 STR_WITH_LEN("\\n "));
1953 sv_catpvs(opts_prog,"\\n\",");
1955 #if defined(LOCAL_PATCH_COUNT)
1956 if (LOCAL_PATCH_COUNT > 0) {
1958 sv_catpvs(opts_prog,
1959 "\" Locally applied patches:\\n\",");
1960 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1961 if (PL_localpatches[i])
1962 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1963 0, PL_localpatches[i], 0);
1967 Perl_sv_catpvf(aTHX_ opts_prog,
1968 "\" Built under %s\\n\"",OSNAME);
1971 Perl_sv_catpvf(aTHX_ opts_prog,
1972 ",\" Compiled at %s %s\\n\"",__DATE__,
1975 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1979 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1980 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1981 "sort grep {/^PERL/} keys %ENV; ");
1983 sv_catpvs(opts_prog,
1984 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1986 sv_catpvs(opts_prog,
1987 "print \" \\%ENV:\\n @env\\n\" if @env;"
1988 "print \" \\@INC:\\n @INC\\n\";");
1992 opts_prog = Perl_newSVpvf(aTHX_
1993 "Config::config_vars(qw%c%s%c)",
1997 av_push(PL_preambleav, opts_prog);
1998 /* don't look for script or read stdin */
1999 scriptname = BIT_BUCKET;
2003 PL_doextract = TRUE;
2011 if (!*++s || isSPACE(*s)) {
2015 /* catch use of gnu style long options */
2016 if (strEQ(s, "version")) {
2020 if (strEQ(s, "help")) {
2027 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2033 #ifndef SECURE_INTERNAL_GETENV
2036 (s = PerlEnv_getenv("PERL5OPT")))
2038 const char *popt = s;
2041 if (*s == '-' && *(s+1) == 'T') {
2042 CHECK_MALLOC_TOO_LATE_FOR('T');
2044 PL_taint_warn = FALSE;
2047 char *popt_copy = NULL;
2060 if (!strchr("CDIMUdmtwA", *s))
2061 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2065 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2066 s = popt_copy + (s - popt);
2067 d = popt_copy + (d - popt);
2074 if( !PL_tainting ) {
2075 PL_taint_warn = TRUE;
2085 #ifdef USE_SITECUSTOMIZE
2087 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2088 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2093 scriptname = argv[0];
2096 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2098 else if (scriptname == NULL) {
2100 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2106 /* Set $^X early so that it can be used for relocatable paths in @INC */
2107 assert (!PL_tainted);
2109 S_set_caret_X(aTHX);
2116 = open_script(scriptname, dosearch, sv, &suidscript);
2118 validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv);
2121 # if defined(SIGCHLD) || defined(SIGCLD)
2124 # define SIGCHLD SIGCLD
2126 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2127 if (sigstate == (Sighandler_t) SIG_IGN) {
2128 if (ckWARN(WARN_SIGNAL))
2129 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2130 "Can't ignore signal CHLD, forcing to default");
2131 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2138 #ifdef MACOS_TRADITIONAL
2139 || gMacPerl_AlwaysExtract
2143 /* This will croak if suidscript is >= 0, as -x cannot be used with
2145 forbid_setid('x', suidscript);
2146 /* Hence you can't get here if suidscript >= 0 */
2148 find_beginning(linestr_sv);
2149 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2150 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2154 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2155 CvUNIQUE_on(PL_compcv);
2157 CvPADLIST(PL_compcv) = pad_new(0);
2159 PL_isarev = newHV();
2162 boot_core_UNIVERSAL();
2163 boot_core_xsutils();
2167 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2169 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2175 # ifdef HAS_SOCKS5_INIT
2176 socks5_init(argv[0]);
2182 init_predump_symbols();
2183 /* init_postdump_symbols not currently designed to be called */
2184 /* more than once (ENV isn't cleared first, for example) */
2185 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2187 init_postdump_symbols(argc,argv,env);
2189 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2190 * or explicitly in some platforms.
2191 * locale.c:Perl_init_i18nl10n() if the environment
2192 * look like the user wants to use UTF-8. */
2193 #if defined(__SYMBIAN32__)
2194 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2197 /* Requires init_predump_symbols(). */
2198 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2203 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2204 * and the default open disciplines. */
2205 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2206 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2208 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2209 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2210 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2212 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2213 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2214 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2216 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2217 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2218 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2220 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2221 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2224 sv_setpvn(sv, ":utf8\0:utf8", 11);
2226 sv_setpvn(sv, ":utf8\0", 6);
2229 sv_setpvn(sv, "\0:utf8", 6);
2235 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2236 if (strEQ(s, "unsafe"))
2237 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2238 else if (strEQ(s, "safe"))
2239 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2241 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2245 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2249 PL_xmlfp = PerlIO_stdout();
2251 PL_xmlfp = PerlIO_open(s, "w");
2253 Perl_croak(aTHX_ "Can't open %s", s);
2255 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2257 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2258 PL_madskills = atoi(s);
2259 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2265 lex_start(linestr_sv);
2267 PL_subname = newSVpvs("main");
2269 /* now parse the script */
2271 SETERRNO(0,SS_NORMAL);
2273 #ifdef MACOS_TRADITIONAL
2274 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2276 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2278 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2279 MacPerl_MPWFileName(PL_origfilename));
2283 if (yyparse() || PL_error_count) {
2285 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2287 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2292 CopLINE_set(PL_curcop, 0);
2293 PL_curstash = PL_defstash;
2294 PL_preprocess = FALSE;
2296 SvREFCNT_dec(PL_e_script);
2304 SAVECOPFILE(PL_curcop);
2305 SAVECOPLINE(PL_curcop);
2306 gv_check(PL_defstash);
2313 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2314 dump_mstats("after compilation:");
2323 =for apidoc perl_run
2325 Tells a Perl interpreter to run. See L<perlembed>.
2338 PERL_UNUSED_ARG(my_perl);
2340 oldscope = PL_scopestack_ix;
2348 cxstack_ix = -1; /* start context stack again */
2350 case 0: /* normal completion */
2354 case 2: /* my_exit() */
2355 while (PL_scopestack_ix > oldscope)
2358 PL_curstash = PL_defstash;
2359 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2360 PL_endav && !PL_minus_c)
2361 call_list(oldscope, PL_endav);
2363 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2364 dump_mstats("after execution: ");
2370 POPSTACK_TO(PL_mainstack);
2373 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2384 S_run_body(pTHX_ I32 oldscope)
2387 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2388 PL_sawampersand ? "Enabling" : "Omitting"));
2390 if (!PL_restartop) {
2394 exit(0); /* less likely to core dump than my_exit(0) */
2397 DEBUG_x(dump_all());
2400 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2402 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2406 #ifdef MACOS_TRADITIONAL
2407 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2408 (gMacPerl_ErrorFormat ? "# " : ""),
2409 MacPerl_MPWFileName(PL_origfilename));
2411 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2415 if (PERLDB_SINGLE && PL_DBsingle)
2416 sv_setiv(PL_DBsingle, 1);
2418 call_list(oldscope, PL_initav);
2419 #ifdef PERL_DEBUG_READONLY_OPS
2420 Perl_pending_Slabs_to_ro(aTHX);
2427 PL_op = PL_restartop;
2431 else if (PL_main_start) {
2432 CvDEPTH(PL_main_cv) = 1;
2433 PL_op = PL_main_start;
2441 =head1 SV Manipulation Functions
2443 =for apidoc p||get_sv
2445 Returns the SV of the specified Perl scalar. If C<create> is set and the
2446 Perl variable does not exist then it will be created. If C<create> is not
2447 set and the variable does not exist then NULL is returned.
2453 Perl_get_sv(pTHX_ const char *name, I32 create)
2456 gv = gv_fetchpv(name, create, SVt_PV);
2463 =head1 Array Manipulation Functions
2465 =for apidoc p||get_av
2467 Returns the AV of the specified Perl array. If C<create> is set and the
2468 Perl variable does not exist then it will be created. If C<create> is not
2469 set and the variable does not exist then NULL is returned.
2475 Perl_get_av(pTHX_ const char *name, I32 create)
2477 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2486 =head1 Hash Manipulation Functions
2488 =for apidoc p||get_hv
2490 Returns the HV of the specified Perl hash. If C<create> is set and the
2491 Perl variable does not exist then it will be created. If C<create> is not
2492 set and the variable does not exist then NULL is returned.
2498 Perl_get_hv(pTHX_ const char *name, I32 create)
2500 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2509 =head1 CV Manipulation Functions
2511 =for apidoc p||get_cvn_flags
2513 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2514 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2515 exist then it will be declared (which has the same effect as saying
2516 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2517 then NULL is returned.
2519 =for apidoc p||get_cv
2521 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2527 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2529 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2530 /* XXX this is probably not what they think they're getting.
2531 * It has the same effect as "sub name;", i.e. just a forward
2533 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2534 SV *const sv = newSVpvn(name,len);
2535 SvFLAGS(sv) |= flags & SVf_UTF8;
2536 return newSUB(start_subparse(FALSE, 0),
2537 newSVOP(OP_CONST, 0, sv),
2546 Perl_get_cv(pTHX_ const char *name, I32 flags)
2548 return get_cvn_flags(name, strlen(name), flags);
2551 /* Be sure to refetch the stack pointer after calling these routines. */
2555 =head1 Callback Functions
2557 =for apidoc p||call_argv
2559 Performs a callback to the specified Perl sub. See L<perlcall>.
2565 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2567 /* See G_* flags in cop.h */
2568 /* null terminated arg list */
2576 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2581 return call_pv(sub_name, flags);
2585 =for apidoc p||call_pv
2587 Performs a callback to the specified Perl sub. See L<perlcall>.
2593 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2594 /* name of the subroutine */
2595 /* See G_* flags in cop.h */
2597 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2601 =for apidoc p||call_method
2603 Performs a callback to the specified Perl method. The blessed object must
2604 be on the stack. See L<perlcall>.
2610 Perl_call_method(pTHX_ const char *methname, I32 flags)
2611 /* name of the subroutine */
2612 /* See G_* flags in cop.h */
2614 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2617 /* May be called with any of a CV, a GV, or an SV containing the name. */
2619 =for apidoc p||call_sv
2621 Performs a callback to the Perl sub whose name is in the SV. See
2628 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2629 /* See G_* flags in cop.h */
2632 LOGOP myop; /* fake syntax tree node */
2637 bool oldcatch = CATCH_GET;
2639 OP* const oldop = PL_op;
2642 if (flags & G_DISCARD) {
2647 Zero(&myop, 1, LOGOP);
2648 myop.op_next = NULL;
2649 if (!(flags & G_NOARGS))
2650 myop.op_flags |= OPf_STACKED;
2651 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2652 (flags & G_ARRAY) ? OPf_WANT_LIST :
2657 EXTEND(PL_stack_sp, 1);
2658 *++PL_stack_sp = sv;
2660 oldscope = PL_scopestack_ix;
2662 if (PERLDB_SUB && PL_curstash != PL_debstash
2663 /* Handle first BEGIN of -d. */
2664 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2665 /* Try harder, since this may have been a sighandler, thus
2666 * curstash may be meaningless. */
2667 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2668 && !(flags & G_NODEBUG))
2669 PL_op->op_private |= OPpENTERSUB_DB;
2671 if (flags & G_METHOD) {
2672 Zero(&method_op, 1, UNOP);
2673 method_op.op_next = PL_op;
2674 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2675 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2676 PL_op = (OP*)&method_op;
2679 if (!(flags & G_EVAL)) {
2681 CALL_BODY_SUB((OP*)&myop);
2682 retval = PL_stack_sp - (PL_stack_base + oldmark);
2683 CATCH_SET(oldcatch);
2686 myop.op_other = (OP*)&myop;
2688 create_eval_scope(flags|G_FAKINGEVAL);
2696 CALL_BODY_SUB((OP*)&myop);
2697 retval = PL_stack_sp - (PL_stack_base + oldmark);
2698 if (!(flags & G_KEEPERR))
2699 sv_setpvn(ERRSV,"",0);
2705 /* my_exit() was called */
2706 PL_curstash = PL_defstash;
2709 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2710 Perl_croak(aTHX_ "Callback called exit");
2715 PL_op = PL_restartop;
2719 PL_stack_sp = PL_stack_base + oldmark;
2720 if (flags & G_ARRAY)
2724 *++PL_stack_sp = &PL_sv_undef;
2729 if (PL_scopestack_ix > oldscope)
2730 delete_eval_scope();
2734 if (flags & G_DISCARD) {
2735 PL_stack_sp = PL_stack_base + oldmark;
2744 /* Eval a string. The G_EVAL flag is always assumed. */
2747 =for apidoc p||eval_sv
2749 Tells Perl to C<eval> the string in the SV.
2755 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2757 /* See G_* flags in cop.h */
2761 UNOP myop; /* fake syntax tree node */
2762 VOL I32 oldmark = SP - PL_stack_base;
2765 OP* const oldop = PL_op;
2768 if (flags & G_DISCARD) {
2775 Zero(PL_op, 1, UNOP);
2776 EXTEND(PL_stack_sp, 1);
2777 *++PL_stack_sp = sv;
2779 if (!(flags & G_NOARGS))
2780 myop.op_flags = OPf_STACKED;
2781 myop.op_next = NULL;
2782 myop.op_type = OP_ENTEREVAL;
2783 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2784 (flags & G_ARRAY) ? OPf_WANT_LIST :
2786 if (flags & G_KEEPERR)
2787 myop.op_flags |= OPf_SPECIAL;
2789 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2790 * before a PUSHEVAL, which corrupts the stack after a croak */
2791 TAINT_PROPER("eval_sv()");
2797 CALL_BODY_EVAL((OP*)&myop);
2798 retval = PL_stack_sp - (PL_stack_base + oldmark);
2799 if (!(flags & G_KEEPERR))
2800 sv_setpvn(ERRSV,"",0);
2806 /* my_exit() was called */
2807 PL_curstash = PL_defstash;
2810 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2811 Perl_croak(aTHX_ "Callback called exit");
2816 PL_op = PL_restartop;
2820 PL_stack_sp = PL_stack_base + oldmark;
2821 if (flags & G_ARRAY)
2825 *++PL_stack_sp = &PL_sv_undef;
2831 if (flags & G_DISCARD) {
2832 PL_stack_sp = PL_stack_base + oldmark;
2842 =for apidoc p||eval_pv
2844 Tells Perl to C<eval> the given string and return an SV* result.
2850 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2854 SV* sv = newSVpv(p, 0);
2856 eval_sv(sv, G_SCALAR);
2863 if (croak_on_error && SvTRUE(ERRSV)) {
2864 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2870 /* Require a module. */
2873 =head1 Embedding Functions
2875 =for apidoc p||require_pv
2877 Tells Perl to C<require> the file named by the string argument. It is
2878 analogous to the Perl code C<eval "require '$file'">. It's even
2879 implemented that way; consider using load_module instead.
2884 Perl_require_pv(pTHX_ const char *pv)
2889 PUSHSTACKi(PERLSI_REQUIRE);
2891 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2892 eval_sv(sv_2mortal(sv), G_DISCARD);
2898 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2900 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2903 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2907 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2909 /* This message really ought to be max 23 lines.
2910 * Removed -h because the user already knows that option. Others? */
2912 static const char * const usage_msg[] = {
2913 "-0[octal] specify record separator (\\0, if no argument)",
2914 "-A[mod][=pattern] activate all/given assertions",
2915 "-a autosplit mode with -n or -p (splits $_ into @F)",
2916 "-C[number/list] enables the listed Unicode features",
2917 "-c check syntax only (runs BEGIN and CHECK blocks)",
2918 "-d[:debugger] run program under debugger",
2919 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2920 "-e program one line of program (several -e's allowed, omit programfile)",
2921 "-E program like -e, but enables all optional features",
2922 "-f don't do $sitelib/sitecustomize.pl at startup",
2923 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2924 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2925 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2926 "-l[octal] enable line ending processing, specifies line terminator",
2927 "-[mM][-]module execute \"use/no module...\" before executing program",
2928 "-n assume \"while (<>) { ... }\" loop around program",
2929 "-p assume loop like -n but print line also, like sed",
2930 "-P run program through C preprocessor before compilation",
2931 "-s enable rudimentary parsing for switches after programfile",
2932 "-S look for programfile using PATH environment variable",
2933 "-t enable tainting warnings",
2934 "-T enable tainting checks",
2935 "-u dump core after parsing program",
2936 "-U allow unsafe operations",
2937 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2938 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2939 "-w enable many useful warnings (RECOMMENDED)",
2940 "-W enable all warnings",
2941 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2942 "-X disable all warnings",
2946 const char * const *p = usage_msg;
2948 PerlIO_printf(PerlIO_stdout(),
2949 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2952 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2955 /* convert a string of -D options (or digits) into an int.
2956 * sets *s to point to the char after the options */
2960 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2962 static const char * const usage_msgd[] = {
2963 " Debugging flag values: (see also -d)",
2964 " p Tokenizing and parsing (with v, displays parse stack)",
2965 " s Stack snapshots (with v, displays all stacks)",
2966 " l Context (loop) stack processing",
2967 " t Trace execution",
2968 " o Method and overloading resolution",
2969 " c String/numeric conversions",
2970 " P Print profiling info, preprocessor command for -P, source file input state",
2971 " m Memory allocation",
2972 " f Format processing",
2973 " r Regular expression parsing and execution",
2974 " x Syntax tree dump",
2975 " u Tainting checks",
2976 " H Hash dump -- usurps values()",
2977 " X Scratchpad allocation",
2979 " S Thread synchronization",
2981 " R Include reference counts of dumped variables (eg when using -Ds)",
2982 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2983 " v Verbose: use in conjunction with other flags",
2985 " A Consistency checks on internal structures",
2986 " q quiet - currently only suppresses the 'EXECUTING' message",
2991 /* if adding extra options, remember to update DEBUG_MASK */
2992 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2994 for (; isALNUM(**s); (*s)++) {
2995 const char * const d = strchr(debopts,**s);
2997 i |= 1 << (d - debopts);
2998 else if (ckWARN_d(WARN_DEBUGGING))
2999 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3000 "invalid option -D%c, use -D'' to see choices\n", **s);
3003 else if (isDIGIT(**s)) {
3005 for (; isALNUM(**s); (*s)++) ;
3007 else if (givehelp) {
3008 const char *const *p = usage_msgd;
3009 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3012 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3013 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3014 "-Dp not implemented on this platform\n");
3020 /* This routine handles any switches that can be given during run */
3023 Perl_moreswitches(pTHX_ char *s)
3034 SvREFCNT_dec(PL_rs);
3035 if (s[1] == 'x' && s[2]) {
3036 const char *e = s+=2;
3042 flags = PERL_SCAN_SILENT_ILLDIGIT;
3043 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3044 if (s + numlen < e) {
3045 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3049 PL_rs = newSVpvs("");
3050 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3051 tmps = (U8*)SvPVX(PL_rs);
3052 uvchr_to_utf8(tmps, rschar);
3053 SvCUR_set(PL_rs, UNISKIP(rschar));
3058 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3059 if (rschar & ~((U8)~0))
3060 PL_rs = &PL_sv_undef;
3061 else if (!rschar && numlen >= 2)
3062 PL_rs = newSVpvs("");
3064 char ch = (char)rschar;
3065 PL_rs = newSVpvn(&ch, 1);
3068 sv_setsv(get_sv("/", TRUE), PL_rs);
3073 PL_unicode = parse_unicode_opts( (const char **)&s );
3074 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3080 while (*s && !isSPACE(*s)) ++s;
3081 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3092 forbid_setid('d', -1);
3095 /* -dt indicates to the debugger that threads will be used */
3096 if (*s == 't' && !isALNUM(s[1])) {
3098 my_setenv("PERL5DB_THREADED", "1");
3101 /* The following permits -d:Mod to accepts arguments following an =
3102 in the fashion that -MSome::Mod does. */
3103 if (*s == ':' || *s == '=') {
3105 SV * const sv = newSVpvs("use Devel::");
3107 /* We now allow -d:Module=Foo,Bar */
3108 while(isALNUM(*s) || *s==':') ++s;
3110 sv_catpv(sv, start);
3112 sv_catpvn(sv, start, s-start);
3113 /* Don't use NUL as q// delimiter here, this string goes in the
3115 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3118 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3121 PL_perldb = PERLDB_ALL;
3128 forbid_setid('D', -1);
3130 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3131 #else /* !DEBUGGING */
3132 if (ckWARN_d(WARN_DEBUGGING))
3133 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3134 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3135 for (s++; isALNUM(*s); s++) ;
3140 usage(PL_origargv[0]);
3143 Safefree(PL_inplace);
3144 #if defined(__CYGWIN__) /* do backup extension automagically */
3145 if (*(s+1) == '\0') {
3146 PL_inplace = savepvs(".bak");
3149 #endif /* __CYGWIN__ */
3151 const char * const start = ++s;
3152 while (*s && !isSPACE(*s))
3155 PL_inplace = savepvn(start, s - start);
3159 if (*s == '-') /* Additional switches on #! line. */
3163 case 'I': /* -I handled both here and in parse_body() */
3164 forbid_setid('I', -1);
3166 while (*s && isSPACE(*s))
3171 /* ignore trailing spaces (possibly followed by other switches) */
3173 for (e = p; *e && !isSPACE(*e); e++) ;
3177 } while (*p && *p != '-');
3178 e = savepvn(s, e-s);
3179 incpush(e, TRUE, TRUE, FALSE, FALSE);
3186 Perl_croak(aTHX_ "No directory specified for -I");
3192 SvREFCNT_dec(PL_ors_sv);
3198 PL_ors_sv = newSVpvs("\n");
3199 numlen = 3 + (*s == '0');
3200 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3204 if (RsPARA(PL_rs)) {
3205 PL_ors_sv = newSVpvs("\n\n");
3208 PL_ors_sv = newSVsv(PL_rs);
3213 forbid_setid('A', -1);
3216 char * const start = s;
3217 SV * const sv = newSVpvs("use assertions::activate");
3218 while(isALNUM(*s) || *s == ':') ++s;
3220 sv_catpvs(sv, "::");
3221 sv_catpvn(sv, start, s-start);
3224 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3227 else if (*s != '\0') {
3228 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3230 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3234 forbid_setid('M', -1); /* XXX ? */
3237 forbid_setid('m', -1); /* XXX ? */
3241 const char *use = "use ";
3242 /* -M-foo == 'no foo' */
3243 /* Leading space on " no " is deliberate, to make both
3244 possibilities the same length. */
3245 if (*s == '-') { use = " no "; ++s; }
3246 sv = newSVpvn(use,4);
3248 /* We allow -M'Module qw(Foo Bar)' */
3249 while(isALNUM(*s) || *s==':') ++s;
3251 sv_catpv(sv, start);
3252 if (*(start-1) == 'm') {
3254 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3255 sv_catpvs( sv, " ()");
3259 Perl_croak(aTHX_ "Module name required with -%c option",
3261 sv_catpvn(sv, start, s-start);
3262 sv_catpvs(sv, " split(/,/,q");
3263 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3265 sv_catpvs(sv, "\0)");
3268 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3271 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3282 forbid_setid('s', -1);
3283 PL_doswitches = TRUE;
3297 #ifdef MACOS_TRADITIONAL
3298 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3300 PL_do_undump = TRUE;
3308 if (!sv_derived_from(PL_patchlevel, "version"))
3309 upg_version(PL_patchlevel, TRUE);
3311 PerlIO_printf(PerlIO_stdout(),
3312 Perl_form(aTHX_ "\nThis is perl, %"SVf
3313 #ifdef PERL_PATCHNUM
3314 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3317 SVfARG(vstringify(PL_patchlevel)),
3320 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3321 PerlIO_printf(PerlIO_stdout(),
3322 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3323 SVfARG(vstringify(PL_patchlevel))));
3324 PerlIO_printf(PerlIO_stdout(),
3325 Perl_form(aTHX_ " built under %s at %s %s\n",
3326 OSNAME, __DATE__, __TIME__));
3327 PerlIO_printf(PerlIO_stdout(),
3328 Perl_form(aTHX_ " OS Specific Release: %s\n",
3332 #if defined(LOCAL_PATCH_COUNT)
3333 if (LOCAL_PATCH_COUNT > 0)
3334 PerlIO_printf(PerlIO_stdout(),
3335 "\n(with %d registered patch%s, "
3336 "see perl -V for more detail)",
3338 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3341 PerlIO_printf(PerlIO_stdout(),
3342 "\n\nCopyright 1987-2007, Larry Wall\n");
3343 #ifdef MACOS_TRADITIONAL
3344 PerlIO_printf(PerlIO_stdout(),
3345 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3346 "maintained by Chris Nandor\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3355 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3360 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3363 PerlIO_printf(PerlIO_stdout(),
3364 "atariST series port, ++jrb bammi@cadence.com\n");
3367 PerlIO_printf(PerlIO_stdout(),
3368 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3371 PerlIO_printf(PerlIO_stdout(),
3372 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3375 PerlIO_printf(PerlIO_stdout(),
3376 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3379 PerlIO_printf(PerlIO_stdout(),
3380 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3383 PerlIO_printf(PerlIO_stdout(),
3384 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3387 PerlIO_printf(PerlIO_stdout(),
3388 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3391 PerlIO_printf(PerlIO_stdout(),
3392 "MiNT port by Guido Flohr, 1997-1999\n");
3395 PerlIO_printf(PerlIO_stdout(),
3396 "EPOC port by Olaf Flebbe, 1999-2002\n");
3399 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3400 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3403 #ifdef __SYMBIAN32__
3404 PerlIO_printf(PerlIO_stdout(),
3405 "Symbian port by Nokia, 2004-2005\n");
3407 #ifdef BINARY_BUILD_NOTICE
3408 BINARY_BUILD_NOTICE;
3410 PerlIO_printf(PerlIO_stdout(),
3412 Perl may be copied only under the terms of either the Artistic License or the\n\
3413 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3414 Complete documentation for Perl, including FAQ lists, should be found on\n\
3415 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3416 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3419 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3420 PL_dowarn |= G_WARN_ON;
3425 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3426 if (!specialWARN(PL_compiling.cop_warnings))
3427 PerlMemShared_free(PL_compiling.cop_warnings);
3428 PL_compiling.cop_warnings = pWARN_ALL ;
3432 PL_dowarn = G_WARN_ALL_OFF;
3433 if (!specialWARN(PL_compiling.cop_warnings))
3434 PerlMemShared_free(PL_compiling.cop_warnings);
3435 PL_compiling.cop_warnings = pWARN_NONE ;
3440 if (s[1] == '-') /* Additional switches on #! line. */
3445 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3451 #ifdef ALTERNATE_SHEBANG
3452 case 'S': /* OS/2 needs -S on "extproc" line. */
3460 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3465 /* compliments of Tom Christiansen */
3467 /* unexec() can be found in the Gnu emacs distribution */
3468 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3471 Perl_my_unexec(pTHX)
3473 PERL_UNUSED_CONTEXT;
3475 SV * prog = newSVpv(BIN_EXP, 0);
3476 SV * file = newSVpv(PL_origfilename, 0);
3480 sv_catpvs(prog, "/perl");
3481 sv_catpvs(file, ".perldump");
3483 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3484 /* unexec prints msg to stderr in case of failure */
3485 PerlProc_exit(status);
3488 # include <lib$routines.h>
3489 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3490 # elif defined(WIN32) || defined(__CYGWIN__)
3491 Perl_croak(aTHX_ "dump is not supported");
3493 ABORT(); /* for use with undump */
3498 /* initialize curinterp */
3504 # define PERLVAR(var,type)
3505 # define PERLVARA(var,n,type)
3506 # if defined(PERL_IMPLICIT_CONTEXT)
3507 # define PERLVARI(var,type,init) aTHX->var = init;
3508 # define PERLVARIC(var,type,init) aTHX->var = init;
3510 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3511 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3513 # include "intrpvar.h"
3514 # include "thrdvar.h"
3520 # define PERLVAR(var,type)
3521 # define PERLVARA(var,n,type)
3522 # define PERLVARI(var,type,init) PL_##var = init;
3523 # define PERLVARIC(var,type,init) PL_##var = init;
3524 # include "intrpvar.h"
3525 # include "thrdvar.h"
3532 /* As these are inside a structure, PERLVARI isn't capable of initialising
3534 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3535 PL_reg_poscache = PL_reg_starttry = NULL;
3539 S_init_main_stash(pTHX)
3544 PL_curstash = PL_defstash = newHV();
3545 /* We know that the string "main" will be in the global shared string
3546 table, so it's a small saving to use it rather than allocate another
3548 PL_curstname = newSVpvs_share("main");
3549 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3550 /* If we hadn't caused another reference to "main" to be in the shared
3551 string table above, then it would be worth reordering these two,
3552 because otherwise all we do is delete "main" from it as a consequence
3553 of the SvREFCNT_dec, only to add it again with hv_name_set */
3554 SvREFCNT_dec(GvHV(gv));
3555 hv_name_set(PL_defstash, "main", 4, 0);
3556 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3558 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3560 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3561 GvMULTI_on(PL_incgv);
3562 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3563 GvMULTI_on(PL_hintgv);
3564 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3565 SvREFCNT_inc_simple_void(PL_defgv);
3566 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3567 SvREFCNT_inc_simple_void(PL_errgv);
3568 GvMULTI_on(PL_errgv);
3569 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3570 GvMULTI_on(PL_replgv);
3571 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3572 #ifdef PERL_DONT_CREATE_GVSV
3575 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3576 sv_setpvn(ERRSV, "", 0);
3577 PL_curstash = PL_defstash;
3578 CopSTASH_set(&PL_compiling, PL_defstash);
3579 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3580 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3582 /* We must init $/ before switches are processed. */
3583 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3587 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3593 const char *cpp_discard_flag;
3602 PL_origfilename = savepvs("-e");
3605 /* if find_script() returns, it returns a malloc()-ed value */
3606 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3608 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3609 const char *s = scriptname + 8;
3615 * Tell apart "normal" usage of fdscript, e.g.
3616 * with bash on FreeBSD:
3617 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3618 * from usage in suidperl.
3619 * Does any "normal" usage leave garbage after the number???
3620 * Is it a mistake to use a similar /dev/fd/ construct for
3625 * Be supersafe and do some sanity-checks.
3626 * Still, can we be sure we got the right thing?
3629 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3632 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3634 scriptname = savepv(s + 1);
3635 Safefree(PL_origfilename);
3636 PL_origfilename = (char *)scriptname;
3641 CopFILE_free(PL_curcop);
3642 CopFILE_set(PL_curcop, PL_origfilename);
3643 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3644 scriptname = (char *)"";
3645 if (fdscript >= 0) {
3646 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3647 # if defined(HAS_FCNTL) && defined(F_SETFD)
3649 /* ensure close-on-exec */
3650 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3655 Perl_croak(aTHX_ "sperl needs fd script\n"
3656 "You should not call sperl directly; do you need to "
3657 "change a #! line\nfrom sperl to perl?\n");
3660 * Do not open (or do other fancy stuff) while setuid.
3661 * Perl does the open, and hands script to suidperl on a fd;
3662 * suidperl only does some checks, sets up UIDs and re-execs
3663 * perl with that fd as it has always done.
3666 if (*suidscript != 1) {
3667 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3670 else if (PL_preprocess) {
3671 const char * const cpp_cfg = CPPSTDIN;
3672 SV * const cpp = newSVpvs("");
3673 SV * const cmd = newSV(0);
3675 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3676 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3677 if (strEQ(cpp_cfg, "cppstdin"))
3678 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3679 sv_catpv(cpp, cpp_cfg);
3682 sv_catpvs(sv, "-I");
3683 sv_catpv(sv,PRIVLIB_EXP);
3686 DEBUG_P(PerlIO_printf(Perl_debug_log,
3687 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3688 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3691 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3698 cpp_discard_flag = "";
3700 cpp_discard_flag = "-C";
3704 perl = os2_execname(aTHX);
3706 perl = PL_origargv[0];
3710 /* This strips off Perl comments which might interfere with
3711 the C pre-processor, including #!. #line directives are
3712 deliberately stripped to avoid confusion with Perl's version
3713 of #line. FWP played some golf with it so it will fit
3714 into VMS's 255 character buffer.
3717 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3719 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3721 Perl_sv_setpvf(aTHX_ cmd, "\
3722 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3723 perl, quote, code, quote, scriptname, SVfARG(cpp),
3724 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3726 PL_doextract = FALSE;
3728 DEBUG_P(PerlIO_printf(Perl_debug_log,
3729 "PL_preprocess: cmd=\"%s\"\n",
3732 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3736 else if (!*scriptname) {
3737 forbid_setid(0, *suidscript);
3738 PL_rsfp = PerlIO_stdin();
3741 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3742 # if defined(HAS_FCNTL) && defined(F_SETFD)
3744 /* ensure close-on-exec */
3745 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3748 #endif /* IAMSUID */
3750 /* PSz 16 Sep 03 Keep neat error message */
3752 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3754 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3755 CopFILE(PL_curcop), Strerror(errno));
3761 * I_SYSSTATVFS HAS_FSTATVFS
3763 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3764 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3765 * here so that metaconfig picks them up. */
3769 S_fd_on_nosuid_fs(pTHX_ int fd)
3772 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3773 * but is needed also on machines without setreuid.
3774 * Seems safe enough to run as root.
3776 int check_okay = 0; /* able to do all the required sys/libcalls */
3777 int on_nosuid = 0; /* the fd is on a nosuid fs */
3779 * Need to check noexec also: nosuid might not be set, the average
3780 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3782 int on_noexec = 0; /* the fd is on a noexec fs */
3785 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3786 * fstatvfs() is UNIX98.
3787 * fstatfs() is 4.3 BSD.
3788 * ustat()+getmnt() is pre-4.3 BSD.
3789 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3790 * an irrelevant filesystem while trying to reach the right one.
3793 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3795 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3796 defined(HAS_FSTATVFS)
3797 # define FD_ON_NOSUID_CHECK_OKAY
3798 struct statvfs stfs;
3800 check_okay = fstatvfs(fd, &stfs) == 0;
3801 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3803 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3804 on platforms where it is present. */
3805 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3807 # endif /* fstatvfs */
3809 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3810 defined(PERL_MOUNT_NOSUID) && \
3811 defined(PERL_MOUNT_NOEXEC) && \
3812 defined(HAS_FSTATFS) && \
3813 defined(HAS_STRUCT_STATFS) && \
3814 defined(HAS_STRUCT_STATFS_F_FLAGS)
3815 # define FD_ON_NOSUID_CHECK_OKAY
3818 check_okay = fstatfs(fd, &stfs) == 0;
3819 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3820 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3821 # endif /* fstatfs */
3823 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3824 defined(PERL_MOUNT_NOSUID) && \
3825 defined(PERL_MOUNT_NOEXEC) && \
3826 defined(HAS_FSTAT) && \
3827 defined(HAS_USTAT) && \
3828 defined(HAS_GETMNT) && \
3829 defined(HAS_STRUCT_FS_DATA) && \
3831 # define FD_ON_NOSUID_CHECK_OKAY
3834 if (fstat(fd, &fdst) == 0) {
3836 if (ustat(fdst.st_dev, &us) == 0) {
3838 /* NOSTAT_ONE here because we're not examining fields which
3839 * vary between that case and STAT_ONE. */
3840 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3841 size_t cmplen = sizeof(us.f_fname);
3842 if (sizeof(fsd.fd_req.path) < cmplen)
3843 cmplen = sizeof(fsd.fd_req.path);
3844 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3845 fdst.st_dev == fsd.fd_req.dev) {
3847 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3848 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3853 # endif /* fstat+ustat+getmnt */
3855 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3856 defined(HAS_GETMNTENT) && \
3857 defined(HAS_HASMNTOPT) && \
3858 defined(MNTOPT_NOSUID) && \
3859 defined(MNTOPT_NOEXEC)
3860 # define FD_ON_NOSUID_CHECK_OKAY
3861 FILE *mtab = fopen("/etc/mtab", "r");
3862 struct mntent *entry;
3865 if (mtab && (fstat(fd, &stb) == 0)) {
3866 while (entry = getmntent(mtab)) {
3867 if (stat(entry->mnt_dir, &fsb) == 0
3868 && fsb.st_dev == stb.st_dev)
3870 /* found the filesystem */
3872 if (hasmntopt(entry, MNTOPT_NOSUID))
3874 if (hasmntopt(entry, MNTOPT_NOEXEC))
3877 } /* A single fs may well fail its stat(). */
3882 # endif /* getmntent+hasmntopt */
3885 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3887 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3889 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3890 return ((!check_okay) || on_nosuid || on_noexec);
3892 #endif /* IAMSUID */
3895 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3896 int fdscript, int suidscript, SV *linestr_sv)
3901 #endif /* IAMSUID */
3903 /* do we need to emulate setuid on scripts? */
3905 /* This code is for those BSD systems that have setuid #! scripts disabled
3906 * in the kernel because of a security problem. Merely defining DOSUID
3907 * in perl will not fix that problem, but if you have disabled setuid
3908 * scripts in the kernel, this will attempt to emulate setuid and setgid
3909 * on scripts that have those now-otherwise-useless bits set. The setuid
3910 * root version must be called suidperl or sperlN.NNN. If regular perl
3911 * discovers that it has opened a setuid script, it calls suidperl with
3912 * the same argv that it had. If suidperl finds that the script it has
3913 * just opened is NOT setuid root, it sets the effective uid back to the
3914 * uid. We don't just make perl setuid root because that loses the
3915 * effective uid we had before invoking perl, if it was different from the
3918 * Description/comments above do not match current workings:
3919 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3920 * suidperl called with script open and name changed to /dev/fd/N/X;
3921 * suidperl croaks if script is not setuid;
3922 * making perl setuid would be a huge security risk (and yes, that
3923 * would lose any euid we might have had).
3925 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3926 * be defined in suidperl only. suidperl must be setuid root. The
3927 * Configure script will set this up for you if you want it.
3933 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3934 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3935 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3937 const char *linestr;
3941 if (fdscript < 0 || suidscript != 1)
3942 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3944 * Since the script is opened by perl, not suidperl, some of these
3945 * checks are superfluous. Leaving them in probably does not lower
3949 * Do checks even for systems with no HAS_SETREUID.
3950 * We used to swap, then re-swap UIDs with
3952 if (setreuid(PL_euid,PL_uid) < 0
3953 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3954 Perl_croak(aTHX_ "Can't swap uid and euid");
3957 if (setreuid(PL_uid,PL_euid) < 0
3958 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3959 Perl_croak(aTHX_ "Can't reswap uid and euid");
3963 /* On this access check to make sure the directories are readable,
3964 * there is actually a small window that the user could use to make
3965 * filename point to an accessible directory. So there is a faint
3966 * chance that someone could execute a setuid script down in a
3967 * non-accessible directory. I don't know what to do about that.
3968 * But I don't think it's too important. The manual lies when
3969 * it says access() is useful in setuid programs.
3971 * So, access() is pretty useless... but not harmful... do anyway.
3973 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3974 Perl_croak(aTHX_ "Can't access() script\n");
3977 /* If we can swap euid and uid, then we can determine access rights
3978 * with a simple stat of the file, and then compare device and
3979 * inode to make sure we did stat() on the same file we opened.
3980 * Then we just have to make sure he or she can execute it.
3983 * As the script is opened by perl, not suidperl, we do not need to
3984 * care much about access rights.
3986 * The 'script changed' check is needed, or we can get lied to
3987 * about $0 with e.g.
3988 * suidperl /dev/fd/4//bin/x 4<setuidscript
3989 * Without HAS_SETREUID, is it safe to stat() as root?
3991 * Are there any operating systems that pass /dev/fd/xxx for setuid
3992 * scripts, as suggested/described in perlsec(1)? Surely they do not
3993 * pass the script name as we do, so the "script changed" test would
3994 * fail for them... but we never get here with
3995 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3997 * This is one place where we must "lie" about return status: not
3998 * say if the stat() failed. We are doing this as root, and could
3999 * be tricked into reporting existence or not of files that the
4000 * "plain" user cannot even see.
4004 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4005 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4006 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4007 Perl_croak(aTHX_ "Setuid script changed\n");
4011 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4012 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4015 * We used to do this check as the "plain" user (after swapping
4016 * UIDs). But the check for nosuid and noexec filesystem is needed,
4017 * and should be done even without HAS_SETREUID. (Maybe those
4018 * operating systems do not have such mount options anyway...)
4019 * Seems safe enough to do as root.
4021 #if !defined(NO_NOSUID_CHECK)
4022 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4023 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4026 #endif /* IAMSUID */
4028 if (!S_ISREG(PL_statbuf.st_mode)) {
4029 Perl_croak(aTHX_ "Setuid script not plain file\n");
4031 if (PL_statbuf.st_mode & S_IWOTH)
4032 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4033 PL_doswitches = FALSE; /* -s is insecure in suid */
4034 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4035 CopLINE_inc(PL_curcop);
4036 if (sv_gets(linestr_sv, PL_rsfp, 0) == NULL)
4037 Perl_croak(aTHX_ "No #! line");
4038 linestr = SvPV_nolen_const(linestr_sv);
4039 /* required even on Sys V */
4040 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4041 Perl_croak(aTHX_ "No #! line");
4045 /* Sanity check on line length */
4046 s_end = s + strlen(s);
4047 if (s_end == s || (s_end - s) > 4000)
4048 Perl_croak(aTHX_ "Very long #! line");
4049 /* Allow more than a single space after #! */
4050 while (isSPACE(*s)) s++;
4051 /* Sanity check on buffer end */
4052 while ((*s) && !isSPACE(*s)) s++;
4053 for (s2 = s; (s2 > linestr &&
4054 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4055 || s2[-1] == '-')); s2--) ;
4056 /* Sanity check on buffer start */
4057 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4058 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4059 Perl_croak(aTHX_ "Not a perl script");
4060 while (*s == ' ' || *s == '\t') s++;
4062 * #! arg must be what we saw above. They can invoke it by
4063 * mentioning suidperl explicitly, but they may not add any strange
4064 * arguments beyond what #! says if they do invoke suidperl that way.
4067 * The way validarg was set up, we rely on the kernel to start
4068 * scripts with argv[1] set to contain all #! line switches (the
4072 * Check that we got all the arguments listed in the #! line (not
4073 * just that there are no extraneous arguments). Might not matter
4074 * much, as switches from #! line seem to be acted upon (also), and
4075 * so may be checked and trapped in perl. But, security checks must
4076 * be done in suidperl and not deferred to perl. Note that suidperl
4077 * does not get around to parsing (and checking) the switches on
4078 * the #! line (but execs perl sooner).
4079 * Allow (require) a trailing newline (which may be of two
4080 * characters on some architectures?) (but no other trailing
4083 len = strlen(validarg);
4084 if (strEQ(validarg," PHOOEY ") ||
4085 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4086 !((s_end - s) == len+1
4087 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4088 Perl_croak(aTHX_ "Args must match #! line");
4092 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4093 PL_euid == PL_statbuf.st_uid)
4095 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4096 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4097 #endif /* IAMSUID */
4100 PL_euid) { /* oops, we're not the setuid root perl */
4102 * When root runs a setuid script, we do not go through the same
4103 * steps of execing sperl and then perl with fd scripts, but
4104 * simply set up UIDs within the same perl invocation; so do
4105 * not have the same checks (on options, whatever) that we have
4106 * for plain users. No problem really: would have to be a script
4107 * that does not actually work for plain users; and if root is
4108 * foolish and can be persuaded to run such an unsafe script, he
4109 * might run also non-setuid ones, and deserves what he gets.
4111 * Or, we might drop the PL_euid check above (and rely just on
4112 * fdscript to avoid loops), and do the execs
4118 * Pass fd script to suidperl.
4119 * Exec suidperl, substituting fd script for scriptname.
4120 * Pass script name as "subdir" of fd, which perl will grok;
4121 * in fact will use that to distinguish this from "normal"
4122 * usage, see comments above.
4124 PerlIO_rewind(PL_rsfp);
4125 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4126 /* PSz 27 Feb 04 Sanity checks on scriptname */
4127 if ((!scriptname) || (!*scriptname) ) {
4128 Perl_croak(aTHX_ "No setuid script name\n");
4130 if (*scriptname == '-') {
4131 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4132 /* Or we might confuse it with an option when replacing
4133 * name in argument list, below (though we do pointer, not
4134 * string, comparisons).
4137 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4138 if (!PL_origargv[which]) {
4139 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4141 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4142 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4143 #if defined(HAS_FCNTL) && defined(F_SETFD)
4144 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4147 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4148 (int)PERL_REVISION, (int)PERL_VERSION,
4149 (int)PERL_SUBVERSION), PL_origargv);
4151 #endif /* IAMSUID */
4152 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4155 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4157 * This seems back to front: we try HAS_SETEGID first; if not available
4158 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4159 * in the sense that we only want to set EGID; but are there any machines
4160 * with either of the latter, but not the former? Same with UID, later.
4163 (void)setegid(PL_statbuf.st_gid);
4166 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4168 #ifdef HAS_SETRESGID
4169 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4171 PerlProc_setgid(PL_statbuf.st_gid);
4175 if (PerlProc_getegid() != PL_statbuf.st_gid)
4176 Perl_croak(aTHX_ "Can't do setegid!\n");
4178 if (PL_statbuf.st_mode & S_ISUID) {
4179 if (PL_statbuf.st_uid != PL_euid)
4181 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4184 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4186 #ifdef HAS_SETRESUID
4187 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4189 PerlProc_setuid(PL_statbuf.st_uid);
4193 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4194 Perl_croak(aTHX_ "Can't do seteuid!\n");
4196 else if (PL_uid) { /* oops, mustn't run as root */
4198 (void)seteuid((Uid_t)PL_uid);
4201 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4203 #ifdef HAS_SETRESUID
4204 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4206 PerlProc_setuid((Uid_t)PL_uid);
4210 if (PerlProc_geteuid() != PL_uid)
4211 Perl_croak(aTHX_ "Can't do seteuid!\n");
4214 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4215 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4218 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4219 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4220 else if (fdscript < 0 || suidscript != 1)
4221 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4222 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4224 /* PSz 16 Sep 03 Keep neat error message */
4225 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4228 /* We absolutely must clear out any saved ids here, so we */
4229 /* exec the real perl, substituting fd script for scriptname. */
4230 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4232 * It might be thought that using setresgid and/or setresuid (changed to
4233 * set the saved IDs) above might obviate the need to exec, and we could
4234 * go on to "do the perl thing".
4236 * Is there such a thing as "saved GID", and is that set for setuid (but
4237 * not setgid) execution like suidperl? Without exec, it would not be
4238 * cleared for setuid (but not setgid) scripts (or might need a dummy
4241 * We need suidperl to do the exact same argument checking that perl
4242 * does. Thus it cannot be very small; while it could be significantly
4243 * smaller, it is safer (simpler?) to make it essentially the same
4244 * binary as perl (but they are not identical). - Maybe could defer that
4245 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4246 * but prefer to do thorough checks in suidperl itself. Such deferral
4247 * would make suidperl security rely on perl, a design no-no.
4249 * Setuid things should be short and simple, thus easy to understand and
4250 * verify. They should do their "own thing", without influence by
4251 * attackers. It may help if their internal execution flow is fixed,
4252 * regardless of platform: it may be best to exec anyway.
4254 * Suidperl should at least be conceptually simple: a wrapper only,
4255 * never to do any real perl. Maybe we should put
4257 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4259 * into the perly bits.
4261 PerlIO_rewind(PL_rsfp);
4262 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4264 * Keep original arguments: suidperl already has fd script.
4266 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4267 /* if (!PL_origargv[which]) { */
4268 /* errno = EPERM; */
4269 /* Perl_croak(aTHX_ "Permission denied\n"); */
4271 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4272 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4273 #if defined(HAS_FCNTL) && defined(F_SETFD)
4274 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4277 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4278 (int)PERL_REVISION, (int)PERL_VERSION,
4279 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4281 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4282 #endif /* IAMSUID */
4284 PERL_UNUSED_ARG(fdscript);
4285 PERL_UNUSED_ARG(suidscript);
4286 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4287 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4288 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4289 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4291 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4294 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4295 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4296 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4297 /* not set-id, must be wrapped */
4300 PERL_UNUSED_ARG(validarg);
4301 PERL_UNUSED_ARG(scriptname);
4302 PERL_UNUSED_ARG(linestr_sv);
4306 S_find_beginning(pTHX_ SV* linestr_sv)
4310 register const char *s2;
4311 #ifdef MACOS_TRADITIONAL
4315 /* skip forward in input to the real script? */
4317 #ifdef MACOS_TRADITIONAL
4318 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4320 while (PL_doextract || gMacPerl_AlwaysExtract) {
4321 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL) {
4322 if (!gMacPerl_AlwaysExtract)
4323 Perl_croak(aTHX_ "No Perl script found in input\n");
4325 if (PL_doextract) /* require explicit override ? */
4326 if (!OverrideExtract(PL_origfilename))
4327 Perl_croak(aTHX_ "User aborted script\n");
4329 PL_doextract = FALSE;
4331 /* Pater peccavi, file does not have #! */
4332 PerlIO_rewind(PL_rsfp);
4337 while (PL_doextract) {
4338 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL)
4339 Perl_croak(aTHX_ "No Perl script found in input\n");
4342 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4343 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4344 PL_doextract = FALSE;
4345 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4347 while (*s == ' ' || *s == '\t') s++;
4349 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4350 || s2[-1] == '_') s2--;
4351 if (strnEQ(s2-4,"perl",4))
4352 while ((s = moreswitches(s)))
4355 #ifdef MACOS_TRADITIONAL
4356 /* We are always searching for the #!perl line in MacPerl,
4357 * so if we find it, still keep the line count correct
4358 * by counting lines we already skipped over
4360 for (; maclines > 0 ; maclines--)
4361 PerlIO_ungetc(PL_rsfp, '\n');
4365 /* gMacPerl_AlwaysExtract is false in MPW tool */
4366 } else if (gMacPerl_AlwaysExtract) {
4378 PL_uid = PerlProc_getuid();
4379 PL_euid = PerlProc_geteuid();
4380 PL_gid = PerlProc_getgid();
4381 PL_egid = PerlProc_getegid();
4383 PL_uid |= PL_gid << 16;
4384 PL_euid |= PL_egid << 16;
4386 /* Should not happen: */
4387 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4388 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4391 * Should go by suidscript, not uid!=euid: why disallow
4392 * system("ls") in scripts run from setuid things?
4393 * Or, is this run before we check arguments and set suidscript?
4394 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4395 * (We never have suidscript, can we be sure to have fdscript?)
4396 * Or must then go by UID checks? See comments in forbid_setid also.
4400 /* This is used very early in the lifetime of the program,
4401 * before even the options are parsed, so PL_tainting has
4402 * not been initialized properly. */
4404 Perl_doing_taint(int argc, char *argv[], char *envp[])
4406 #ifndef PERL_IMPLICIT_SYS
4407 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4408 * before we have an interpreter-- and the whole point of this
4409 * function is to be called at such an early stage. If you are on
4410 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4411 * "tainted because running with altered effective ids', you'll
4412 * have to add your own checks somewhere in here. The two most
4413 * known samples of 'implicitness' are Win32 and NetWare, neither
4414 * of which has much of concept of 'uids'. */
4415 int uid = PerlProc_getuid();
4416 int euid = PerlProc_geteuid();
4417 int gid = PerlProc_getgid();
4418 int egid = PerlProc_getegid();
4425 if (uid && (euid != uid || egid != gid))
4427 #endif /* !PERL_IMPLICIT_SYS */
4428 /* This is a really primitive check; environment gets ignored only
4429 * if -T are the first chars together; otherwise one gets
4430 * "Too late" message. */
4431 if ( argc > 1 && argv[1][0] == '-'
4432 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4437 /* Passing the flag as a single char rather than a string is a slight space
4438 optimisation. The only message that isn't /^-.$/ is
4439 "program input from stdin", which is substituted in place of '\0', which
4440 could never be a command line flag. */
4442 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4445 char string[3] = "-x";
4446 const char *message = "program input from stdin";
4453 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4454 if (PL_euid != PL_uid)
4455 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4456 if (PL_egid != PL_gid)
4457 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4458 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4460 * Checks for UID/GID above "wrong": why disallow
4461 * perl -e 'print "Hello\n"'
4462 * from within setuid things?? Simply drop them: replaced by
4463 * fdscript/suidscript and #ifdef IAMSUID checks below.
4465 * This may be too late for command-line switches. Will catch those on
4466 * the #! line, after finding the script name and setting up
4467 * fdscript/suidscript. Note that suidperl does not get around to
4468 * parsing (and checking) the switches on the #! line, but checks that
4469 * the two sets are identical.
4471 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4472 * instead, or would that be "too late"? (We never have suidscript, can
4473 * we be sure to have fdscript?)
4475 * Catch things with suidscript (in descendant of suidperl), even with
4476 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4477 * below; but I am paranoid.
4479 * Also see comments about root running a setuid script, elsewhere.
4481 if (suidscript >= 0)
4482 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4484 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4485 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4486 #endif /* IAMSUID */
4490 Perl_init_debugger(pTHX)
4493 HV * const ostash = PL_curstash;
4495 PL_curstash = PL_debstash;
4496 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4498 AvREAL_off(PL_dbargs);
4499 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4500 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4501 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4502 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4503 sv_setiv(PL_DBsingle, 0);
4504 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4505 sv_setiv(PL_DBtrace, 0);
4506 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4507 sv_setiv(PL_DBsignal, 0);
4508 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4509 sv_setiv(PL_DBassertion, 0);
4510 PL_curstash = ostash;
4513 #ifndef STRESS_REALLOC
4514 #define REASONABLE(size) (size)
4516 #define REASONABLE(size) (1) /* unreasonable */
4520 Perl_init_stacks(pTHX)
4523 /* start with 128-item stack and 8K cxstack */
4524 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4525 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4526 PL_curstackinfo->si_type = PERLSI_MAIN;
4527 PL_curstack = PL_curstackinfo->si_stack;
4528 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4530 PL_stack_base = AvARRAY(PL_curstack);
4531 PL_stack_sp = PL_stack_base;
4532 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4534 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4537 PL_tmps_max = REASONABLE(128);
4539 Newx(PL_markstack,REASONABLE(32),I32);
4540 PL_markstack_ptr = PL_markstack;
4541 PL_markstack_max = PL_markstack + REASONABLE(32);
4545 Newx(PL_scopestack,REASONABLE(32),I32);
4546 PL_scopestack_ix = 0;
4547 PL_scopestack_max = REASONABLE(32);
4549 Newx(PL_savestack,REASONABLE(128),ANY);
4550 PL_savestack_ix = 0;
4551 PL_savestack_max = REASONABLE(128);
4560 while (PL_curstackinfo->si_next)
4561 PL_curstackinfo = PL_curstackinfo->si_next;
4562 while (PL_curstackinfo) {
4563 PERL_SI *p = PL_curstackinfo->si_prev;
4564 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4565 Safefree(PL_curstackinfo->si_cxstack);
4566 Safefree(PL_curstackinfo);
4567 PL_curstackinfo = p;
4569 Safefree(PL_tmps_stack);
4570 Safefree(PL_markstack);
4571 Safefree(PL_scopestack);
4572 Safefree(PL_savestack);
4577 S_init_predump_symbols(pTHX)
4583 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4584 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4585 GvMULTI_on(PL_stdingv);
4586 io = GvIOp(PL_stdingv);
4587 IoTYPE(io) = IoTYPE_RDONLY;
4588 IoIFP(io) = PerlIO_stdin();
4589 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4591 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4593 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4596 IoTYPE(io) = IoTYPE_WRONLY;
4597 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4599 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4601 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4603 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4604 GvMULTI_on(PL_stderrgv);
4605 io = GvIOp(PL_stderrgv);
4606 IoTYPE(io) = IoTYPE_WRONLY;
4607 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4608 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4610 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4612 PL_statname = newSV(0); /* last filename we did stat on */
4614 Safefree(PL_osname);
4615 PL_osname = savepv(OSNAME);
4619 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4622 argc--,argv++; /* skip name of script */
4623 if (PL_doswitches) {
4624 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4628 if (argv[0][1] == '-' && !argv[0][2]) {
4632 if ((s = strchr(argv[0], '='))) {
4633 const char *const start_name = argv[0] + 1;
4634 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4635 TRUE, SVt_PV)), s + 1);
4638 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4641 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4642 GvMULTI_on(PL_argvgv);
4643 (void)gv_AVadd(PL_argvgv);
4644 av_clear(GvAVn(PL_argvgv));
4645 for (; argc > 0; argc--,argv++) {
4646 SV * const sv = newSVpv(argv[0],0);
4647 av_push(GvAVn(PL_argvgv),sv);
4648 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4649 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4652 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4653 (void)sv_utf8_decode(sv);
4659 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4664 PL_toptarget = newSV_type(SVt_PVFM);
4665 sv_setpvn(PL_toptarget, "", 0);
4666 PL_bodytarget = newSV_type(SVt_PVFM);
4667 sv_setpvn(PL_bodytarget, "", 0);
4668 PL_formtarget = PL_bodytarget;
4672 init_argv_symbols(argc,argv);
4674 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4675 #ifdef MACOS_TRADITIONAL
4676 /* $0 is not majick on a Mac */
4677 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4679 sv_setpv(GvSV(tmpgv),PL_origfilename);
4680 magicname("0", "0", 1);
4683 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4685 bool env_is_not_environ;
4686 GvMULTI_on(PL_envgv);
4687 hv = GvHVn(PL_envgv);
4688 hv_magic(hv, NULL, PERL_MAGIC_env);
4690 #ifdef USE_ENVIRON_ARRAY
4691 /* Note that if the supplied env parameter is actually a copy
4692 of the global environ then it may now point to free'd memory
4693 if the environment has been modified since. To avoid this
4694 problem we treat env==NULL as meaning 'use the default'
4698 env_is_not_environ = env != environ;
4699 if (env_is_not_environ
4700 # ifdef USE_ITHREADS
4701 && PL_curinterp == aTHX
4710 for (; *env; env++) {
4711 if (!(s = strchr(*env,'=')) || s == *env)
4713 #if defined(MSDOS) && !defined(DJGPP)
4718 sv = newSVpv(s+1, 0);
4719 (void)hv_store(hv, *env, s - *env, sv, 0);
4720 if (env_is_not_environ)
4724 #endif /* USE_ENVIRON_ARRAY */
4725 #endif /* !PERL_MICRO */
4728 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4729 SvREADONLY_off(GvSV(tmpgv));
4730 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4731 SvREADONLY_on(GvSV(tmpgv));
4733 #ifdef THREADS_HAVE_PIDS
4734 PL_ppid = (IV)getppid();
4737 /* touch @F array to prevent spurious warnings 20020415 MJD */
4739 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4744 S_init_perllib(pTHX)
4750 s = PerlEnv_getenv("PERL5LIB");
4752 * It isn't possible to delete an environment variable with
4753 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4754 * case we treat PERL5LIB as undefined if it has a zero-length value.
4756 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4757 if (s && *s != '\0')
4761 incpush(s, TRUE, TRUE, TRUE, FALSE);
4763 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4765 /* Treat PERL5?LIB as a possible search list logical name -- the
4766 * "natural" VMS idiom for a Unix path string. We allow each
4767 * element to be a set of |-separated directories for compatibility.
4771 if (my_trnlnm("PERL5LIB",buf,0))
4772 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4774 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4778 /* Use the ~-expanded versions of APPLLIB (undocumented),
4779 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4782 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4786 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4788 #ifdef MACOS_TRADITIONAL
4791 SV * privdir = newSV(0);
4792 char * macperl = PerlEnv_getenv("MACPERL");
4797 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4798 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4799 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4800 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4801 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4802 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4804 SvREFCNT_dec(privdir);
4807 incpush(":", FALSE, FALSE, TRUE, FALSE);
4810 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4813 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4815 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4819 /* sitearch is always relative to sitelib on Windows for
4820 * DLL-based path intuition to work correctly */
4821 # if !defined(WIN32)
4822 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4828 /* this picks up sitearch as well */
4829 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4831 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4835 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4836 /* Search for version-specific dirs below here */
4837 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4840 #ifdef PERL_VENDORARCH_EXP
4841 /* vendorarch is always relative to vendorlib on Windows for
4842 * DLL-based path intuition to work correctly */
4843 # if !defined(WIN32)
4844 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4848 #ifdef PERL_VENDORLIB_EXP
4850 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4852 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4856 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4857 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4860 #ifdef PERL_OTHERLIBDIRS
4861 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4865 incpush(".", FALSE, FALSE, TRUE, FALSE);
4866 #endif /* MACOS_TRADITIONAL */
4869 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4870 # define PERLLIB_SEP ';'
4873 # define PERLLIB_SEP '|'
4875 # if defined(MACOS_TRADITIONAL)
4876 # define PERLLIB_SEP ','
4878 # define PERLLIB_SEP ':'
4882 #ifndef PERLLIB_MANGLE
4883 # define PERLLIB_MANGLE(s,n) (s)
4886 /* Push a directory onto @INC if it exists.
4887 Generate a new SV if we do this, to save needing to copy the SV we push
4890 S_incpush_if_exists(pTHX_ SV *dir)
4894 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4895 S_ISDIR(tmpstatbuf.st_mode)) {
4896 av_push(GvAVn(PL_incgv), dir);
4903 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4908 const char *p = dir;
4913 if (addsubdirs || addoldvers) {
4917 /* Break at all separators */
4919 SV *libdir = newSV(0);
4922 /* skip any consecutive separators */
4924 while ( *p == PERLLIB_SEP ) {
4925 /* Uncomment the next line for PATH semantics */
4926 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4931 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4932 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4937 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4938 p = NULL; /* break out */
4940 #ifdef MACOS_TRADITIONAL
4941 if (!strchr(SvPVX(libdir), ':')) {
4944 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4946 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4947 sv_catpvs(libdir, ":");
4950 /* Do the if() outside the #ifdef to avoid warnings about an unused
4953 #ifdef PERL_RELOCATABLE_INC
4955 * Relocatable include entries are marked with a leading .../
4958 * 0: Remove that leading ".../"
4959 * 1: Remove trailing executable name (anything after the last '/')
4960 * from the perl path to give a perl prefix
4962 * While the @INC element starts "../" and the prefix ends with a real
4963 * directory (ie not . or ..) chop that real directory off the prefix
4964 * and the leading "../" from the @INC element. ie a logical "../"
4966 * Finally concatenate the prefix and the remainder of the @INC element
4967 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4968 * generates /usr/local/lib/perl5
4970 const char *libpath = SvPVX(libdir);
4971 STRLEN libpath_len = SvCUR(libdir);
4972 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4974 SV * const caret_X = get_sv("\030", 0);
4975 /* Going to use the SV just as a scratch buffer holding a C
4981 /* $^X is *the* source of taint if tainting is on, hence
4982 SvPOK() won't be true. */
4984 assert(SvPOKp(caret_X));
4985 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4986 /* Firstly take off the leading .../
4987 If all else fail we'll do the paths relative to the current
4989 sv_chop(libdir, libpath + 4);
4990 /* Don't use SvPV as we're intentionally bypassing taining,
4991 mortal copies that the mg_get of tainting creates, and
4992 corruption that seems to come via the save stack.
4993 I guess that the save stack isn't correctly set up yet. */
4994 libpath = SvPVX(libdir);
4995 libpath_len = SvCUR(libdir);
4997 /* This would work more efficiently with memrchr, but as it's
4998 only a GNU extension we'd need to probe for it and
4999 implement our own. Not hard, but maybe not worth it? */
5001 prefix = SvPVX(prefix_sv);
5002 lastslash = strrchr(prefix, '/');
5004 /* First time in with the *lastslash = '\0' we just wipe off
5005 the trailing /perl from (say) /usr/foo/bin/perl
5009 while ((*lastslash = '\0'), /* Do that, come what may. */
5010 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5011 && (lastslash = strrchr(prefix, '/')))) {
5012 if (lastslash[1] == '\0'
5013 || (lastslash[1] == '.'
5014 && (lastslash[2] == '/' /* ends "/." */
5015 || (lastslash[2] == '/'
5016 && lastslash[3] == '/' /* or "/.." */
5018 /* Prefix ends "/" or "/." or "/..", any of which
5019 are fishy, so don't do any more logical cleanup.
5023 /* Remove leading "../" from path */
5026 /* Next iteration round the loop removes the last
5027 directory name from prefix by writing a '\0' in
5028 the while clause. */
5030 /* prefix has been terminated with a '\0' to the correct
5031 length. libpath points somewhere into the libdir SV.
5032 We need to join the 2 with '/' and drop the result into
5034 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5035 SvREFCNT_dec(libdir);
5036 /* And this is the new libdir. */
5039 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5040 /* Need to taint reloccated paths if running set ID */
5041 SvTAINTED_on(libdir);
5044 SvREFCNT_dec(prefix_sv);
5049 * BEFORE pushing libdir onto @INC we may first push version- and
5050 * archname-specific sub-directories.
5052 if (addsubdirs || addoldvers) {
5053 #ifdef PERL_INC_VERSION_LIST
5054 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5055 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5056 const char * const *incver;
5062 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5064 while (unix[len-1] == '/') len--; /* Cosmetic */
5065 sv_usepvn(libdir,unix,len);
5068 PerlIO_printf(Perl_error_log,
5069 "Failed to unixify @INC element \"%s\"\n",
5073 #ifdef MACOS_TRADITIONAL
5074 #define PERL_AV_SUFFIX_FMT ""
5075 #define PERL_ARCH_FMT "%s:"
5076 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5078 #define PERL_AV_SUFFIX_FMT "/"
5079 #define PERL_ARCH_FMT "/%s"
5080 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5082 /* .../version/archname if -d .../version/archname */
5083 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5085 (int)PERL_REVISION, (int)PERL_VERSION,
5086 (int)PERL_SUBVERSION, ARCHNAME);
5087 subdir = S_incpush_if_exists(aTHX_ subdir);
5089 /* .../version if -d .../version */
5090 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5092 (int)PERL_REVISION, (int)PERL_VERSION,
5093 (int)PERL_SUBVERSION);
5094 subdir = S_incpush_if_exists(aTHX_ subdir);
5096 /* .../archname if -d .../archname */
5097 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5098 SVfARG(libdir), ARCHNAME);
5099 subdir = S_incpush_if_exists(aTHX_ subdir);
5103 #ifdef PERL_INC_VERSION_LIST
5105 for (incver = incverlist; *incver; incver++) {
5106 /* .../xxx if -d .../xxx */
5107 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5108 SVfARG(libdir), *incver);
5109 subdir = S_incpush_if_exists(aTHX_ subdir);
5115 /* finally push this lib directory on the end of @INC */
5116 av_push(GvAVn(PL_incgv), libdir);
5119 assert (SvREFCNT(subdir) == 1);
5120 SvREFCNT_dec(subdir);
5126 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5130 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5136 while (av_len(paramList) >= 0) {
5137 cv = (CV*)av_shift(paramList);
5139 if (paramList == PL_beginav) {
5140 /* save PL_beginav for compiler */
5141 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5143 else if (paramList == PL_checkav) {
5144 /* save PL_checkav for compiler */
5145 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5147 else if (paramList == PL_unitcheckav) {
5148 /* save PL_unitcheckav for compiler */
5149 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5160 PL_madskills |= 16384;
5165 PL_madskills &= ~16384;
5168 (void)SvPV_const(atsv, len);
5170 PL_curcop = &PL_compiling;
5171 CopLINE_set(PL_curcop, oldline);
5172 if (paramList == PL_beginav)
5173 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5175 Perl_sv_catpvf(aTHX_ atsv,
5176 "%s failed--call queue aborted",
5177 paramList == PL_checkav ? "CHECK"
5178 : paramList == PL_initav ? "INIT"
5179 : paramList == PL_unitcheckav ? "UNITCHECK"
5181 while (PL_scopestack_ix > oldscope)
5184 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5191 /* my_exit() was called */
5192 while (PL_scopestack_ix > oldscope)
5195 PL_curstash = PL_defstash;
5196 PL_curcop = &PL_compiling;
5197 CopLINE_set(PL_curcop, oldline);
5199 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5200 if (paramList == PL_beginav)
5201 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5203 Perl_croak(aTHX_ "%s failed--call queue aborted",
5204 paramList == PL_checkav ? "CHECK"
5205 : paramList == PL_initav ? "INIT"
5206 : paramList == PL_unitcheckav ? "UNITCHECK"
5213 PL_curcop = &PL_compiling;
5214 CopLINE_set(PL_curcop, oldline);
5217 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5226 Perl_my_exit(pTHX_ U32 status)
5229 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5230 (void*)thr, (unsigned long) status));
5239 STATUS_EXIT_SET(status);
5246 Perl_my_failure_exit(pTHX)
5250 /* We have been called to fall on our sword. The desired exit code
5251 * should be already set in STATUS_UNIX, but could be shifted over
5252 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5255 * If an error code has not been set, then force the issue.
5257 if (MY_POSIX_EXIT) {
5259 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5260 * the exit code when there isn't an error.
5263 if (STATUS_UNIX == 0)
5264 STATUS_UNIX_EXIT_SET(255);
5266 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5268 /* The exit code could have been set by $? or vmsish which
5269 * means that it may not be fatal. So convert
5270 * success/warning codes to fatal.
5272 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5273 STATUS_UNIX_EXIT_SET(255);
5277 /* Traditionally Perl on VMS always expects a Fatal Error. */
5278 if (vaxc$errno & 1) {
5280 /* So force success status to failure */
5281 if (STATUS_NATIVE & 1)
5286 STATUS_UNIX = EINTR; /* In case something cares */
5291 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5293 /* Encode the severity code */
5294 severity = STATUS_NATIVE & STS$M_SEVERITY;
5295 STATUS_UNIX = (severity ? severity : 1) << 8;
5297 /* Perl expects this to be a fatal error */
5298 if (severity != STS$K_SEVERE)
5307 STATUS_UNIX_SET(errno);
5309 exitstatus = STATUS_UNIX >> 8;
5310 if (exitstatus & 255)
5311 STATUS_UNIX_SET(exitstatus);
5313 STATUS_UNIX_SET(255);
5320 S_my_exit_jump(pTHX)
5325 SvREFCNT_dec(PL_e_script);
5329 POPSTACK_TO(PL_mainstack);
5337 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5340 const char * const p = SvPVX_const(PL_e_script);
5341 const char *nl = strchr(p, '\n');
5343 PERL_UNUSED_ARG(idx);
5344 PERL_UNUSED_ARG(maxlen);
5346 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5348 filter_del(read_e_script);
5351 sv_catpvn(buf_sv, p, nl-p);
5352 sv_chop(PL_e_script, nl);
5358 * c-indentation-style: bsd
5360 * indent-tabs-mode: t
5363 * ex: set ts=8 sts=4 sw=4 noet: