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);
1078 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1079 if (PL_scopestack_ix != 0)
1080 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1081 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1082 (long)PL_scopestack_ix);
1083 if (PL_savestack_ix != 0)
1084 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1085 "Unbalanced saves: %ld more saves than restores\n",
1086 (long)PL_savestack_ix);
1087 if (PL_tmps_floor != -1)
1088 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1089 (long)PL_tmps_floor + 1);
1090 if (cxstack_ix != -1)
1091 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1092 (long)cxstack_ix + 1);
1095 /* Now absolutely destruct everything, somehow or other, loops or no. */
1096 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1097 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1099 /* the 2 is for PL_fdpid and PL_strtab */
1100 while (PL_sv_count > 2 && sv_clean_all())
1103 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1104 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1105 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1106 SvFLAGS(PL_strtab) |= SVt_PVHV;
1108 AvREAL_off(PL_fdpid); /* no surviving entries */
1109 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1112 #ifdef HAVE_INTERP_INTERN
1116 /* Destruct the global string table. */
1118 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1119 * so that sv_free() won't fail on them.
1120 * Now that the global string table is using a single hunk of memory
1121 * for both HE and HEK, we either need to explicitly unshare it the
1122 * correct way, or actually free things here.
1125 const I32 max = HvMAX(PL_strtab);
1126 HE * const * const array = HvARRAY(PL_strtab);
1127 HE *hent = array[0];
1130 if (hent && ckWARN_d(WARN_INTERNAL)) {
1131 HE * const next = HeNEXT(hent);
1132 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1133 "Unbalanced string table refcount: (%ld) for \"%s\"",
1134 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1141 hent = array[riter];
1146 HvARRAY(PL_strtab) = 0;
1147 HvTOTALKEYS(PL_strtab) = 0;
1148 HvFILL(PL_strtab) = 0;
1150 SvREFCNT_dec(PL_strtab);
1153 /* free the pointer tables used for cloning */
1154 ptr_table_free(PL_ptr_table);
1155 PL_ptr_table = (PTR_TBL_t*)NULL;
1158 /* free special SVs */
1160 SvREFCNT(&PL_sv_yes) = 0;
1161 sv_clear(&PL_sv_yes);
1162 SvANY(&PL_sv_yes) = NULL;
1163 SvFLAGS(&PL_sv_yes) = 0;
1165 SvREFCNT(&PL_sv_no) = 0;
1166 sv_clear(&PL_sv_no);
1167 SvANY(&PL_sv_no) = NULL;
1168 SvFLAGS(&PL_sv_no) = 0;
1172 for (i=0; i<=2; i++) {
1173 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1174 sv_clear(PERL_DEBUG_PAD(i));
1175 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1176 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1180 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1181 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1183 #ifdef DEBUG_LEAKING_SCALARS
1184 if (PL_sv_count != 0) {
1189 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1190 svend = &sva[SvREFCNT(sva)];
1191 for (sv = sva + 1; sv < svend; ++sv) {
1192 if (SvTYPE(sv) != SVTYPEMASK) {
1193 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1195 " refcnt=%"UVuf pTHX__FORMAT "\n"
1196 "\tallocated at %s:%d %s %s%s\n",
1197 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1198 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1200 sv->sv_debug_inpad ? "for" : "by",
1201 sv->sv_debug_optype ?
1202 PL_op_name[sv->sv_debug_optype]: "(none)",
1203 sv->sv_debug_cloned ? " (cloned)" : ""
1205 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1206 Perl_dump_sv_child(aTHX_ sv);
1212 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1216 /* Wait for up to 4 seconds for child to terminate.
1217 This seems to be the least effort way of timing out on reaping
1219 struct timeval waitfor = {4, 0};
1220 int sock = PL_dumper_fd;
1224 FD_SET(sock, &rset);
1225 select(sock + 1, &rset, NULL, NULL, &waitfor);
1226 waitpid(child, &status, WNOHANG);
1233 #ifdef PERL_DEBUG_READONLY_OPS
1239 #if defined(PERLIO_LAYERS)
1240 /* No more IO - including error messages ! */
1241 PerlIO_cleanup(aTHX);
1244 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1245 as currently layers use it rather than NULL as a marker
1246 for no arg - and will try and SvREFCNT_dec it.
1248 SvREFCNT(&PL_sv_undef) = 0;
1249 SvREADONLY_off(&PL_sv_undef);
1251 Safefree(PL_origfilename);
1252 PL_origfilename = NULL;
1253 Safefree(PL_reg_start_tmp);
1254 PL_reg_start_tmp = (char**)NULL;
1255 PL_reg_start_tmpl = 0;
1256 Safefree(PL_reg_curpm);
1257 Safefree(PL_reg_poscache);
1258 free_tied_hv_pool();
1259 Safefree(PL_op_mask);
1260 Safefree(PL_psig_ptr);
1261 PL_psig_ptr = (SV**)NULL;
1262 Safefree(PL_psig_name);
1263 PL_psig_name = (SV**)NULL;
1264 Safefree(PL_bitcount);
1266 Safefree(PL_psig_pend);
1267 PL_psig_pend = (int*)NULL;
1270 PL_tainting = FALSE;
1271 PL_taint_warn = FALSE;
1272 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1275 DEBUG_P(debprofdump());
1277 #ifdef USE_REENTRANT_API
1278 Perl_reentrant_free(aTHX);
1283 while (PL_regmatch_slab) {
1284 regmatch_slab *s = PL_regmatch_slab;
1285 PL_regmatch_slab = PL_regmatch_slab->next;
1289 /* As the absolutely last thing, free the non-arena SV for mess() */
1292 /* we know that type == SVt_PVMG */
1294 /* it could have accumulated taint magic */
1297 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1298 moremagic = mg->mg_moremagic;
1299 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1301 Safefree(mg->mg_ptr);
1305 /* we know that type >= SVt_PV */
1306 SvPV_free(PL_mess_sv);
1307 Safefree(SvANY(PL_mess_sv));
1308 Safefree(PL_mess_sv);
1315 =for apidoc perl_free
1317 Releases a Perl interpreter. See L<perlembed>.
1327 if (PL_veto_cleanup)
1330 #ifdef PERL_TRACK_MEMPOOL
1333 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1334 * value as we're probably hunting memory leaks then
1336 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1337 if (!s || atoi(s) == 0) {
1338 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1339 thread at thread exit. */
1340 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1341 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1346 #if defined(WIN32) || defined(NETWARE)
1347 # if defined(PERL_IMPLICIT_SYS)
1350 void *host = nw_internal_host;
1352 void *host = w32_internal_host;
1354 PerlMem_free(aTHXx);
1356 nw_delete_internal_host(host);
1358 win32_delete_internal_host(host);
1362 PerlMem_free(aTHXx);
1365 PerlMem_free(aTHXx);
1369 #if defined(USE_ITHREADS)
1370 /* provide destructors to clean up the thread key when libperl is unloaded */
1371 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1373 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1374 #pragma fini "perl_fini"
1375 #elif defined(__sun) && !defined(__GNUC__)
1376 #pragma fini (perl_fini)
1380 #if defined(__GNUC__)
1381 __attribute__((destructor))
1386 if (PL_curinterp && !PL_veto_cleanup)
1391 #endif /* THREADS */
1394 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1397 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1398 PL_exitlist[PL_exitlistlen].fn = fn;
1399 PL_exitlist[PL_exitlistlen].ptr = ptr;
1403 #ifdef HAS_PROCSELFEXE
1404 /* This is a function so that we don't hold on to MAXPATHLEN
1405 bytes of stack longer than necessary
1408 S_procself_val(pTHX_ SV *sv, const char *arg0)
1410 char buf[MAXPATHLEN];
1411 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1413 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1414 includes a spurious NUL which will cause $^X to fail in system
1415 or backticks (this will prevent extensions from being built and
1416 many tests from working). readlink is not meant to add a NUL.
1417 Normal readlink works fine.
1419 if (len > 0 && buf[len-1] == '\0') {
1423 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1424 returning the text "unknown" from the readlink rather than the path
1425 to the executable (or returning an error from the readlink). Any valid
1426 path has a '/' in it somewhere, so use that to validate the result.
1427 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1429 if (len > 0 && memchr(buf, '/', len)) {
1430 sv_setpvn(sv,buf,len);
1436 #endif /* HAS_PROCSELFEXE */
1439 S_set_caret_X(pTHX) {
1441 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1443 #ifdef HAS_PROCSELFEXE
1444 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1447 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1449 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1456 =for apidoc perl_parse
1458 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1464 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1471 PERL_UNUSED_ARG(my_perl);
1473 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1476 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1477 setuid perl scripts securely.\n");
1478 #endif /* IAMSUID */
1481 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1482 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1483 * This MUST be done before any hash stores or fetches take place.
1484 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1485 * yourself, it is your responsibility to provide a good random seed!
1486 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1487 if (!PL_rehash_seed_set)
1488 PL_rehash_seed = get_hash_seed();
1490 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1492 if (s && (atoi(s) == 1))
1493 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1495 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1500 if (PL_origalen != 0) {
1501 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1504 /* Set PL_origalen be the sum of the contiguous argv[]
1505 * elements plus the size of the env in case that it is
1506 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1507 * as the maximum modifiable length of $0. In the worst case
1508 * the area we are able to modify is limited to the size of
1509 * the original argv[0]. (See below for 'contiguous', though.)
1511 const char *s = NULL;
1514 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1515 /* Do the mask check only if the args seem like aligned. */
1517 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1519 /* See if all the arguments are contiguous in memory. Note
1520 * that 'contiguous' is a loose term because some platforms
1521 * align the argv[] and the envp[]. If the arguments look
1522 * like non-aligned, assume that they are 'strictly' or
1523 * 'traditionally' contiguous. If the arguments look like
1524 * aligned, we just check that they are within aligned
1525 * PTRSIZE bytes. As long as no system has something bizarre
1526 * like the argv[] interleaved with some other data, we are
1527 * fine. (Did I just evoke Murphy's Law?) --jhi */
1528 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1530 for (i = 1; i < PL_origargc; i++) {
1531 if ((PL_origargv[i] == s + 1
1533 || PL_origargv[i] == s + 2
1538 (PL_origargv[i] > s &&
1540 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1551 #ifndef PERL_USE_SAFE_PUTENV
1552 /* Can we grab env area too to be used as the area for $0? */
1553 if (s && PL_origenviron && !PL_use_safe_putenv) {
1554 if ((PL_origenviron[0] == s + 1)
1557 (PL_origenviron[0] > s &&
1558 PL_origenviron[0] <=
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1562 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1563 s = PL_origenviron[0];
1566 my_setenv("NoNe SuCh", NULL);
1567 /* Force copy of environment. */
1568 for (i = 1; PL_origenviron[i]; i++) {
1569 if (PL_origenviron[i] == s + 1
1572 (PL_origenviron[i] > s &&
1573 PL_origenviron[i] <=
1574 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 s = PL_origenviron[i];
1585 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1587 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1592 /* Come here if running an undumped a.out. */
1594 PL_origfilename = savepv(argv[0]);
1595 PL_do_undump = FALSE;
1596 cxstack_ix = -1; /* start label stack again */
1598 assert (!PL_tainted);
1600 S_set_caret_X(aTHX);
1602 init_postdump_symbols(argc,argv,env);
1607 op_free(PL_main_root);
1608 PL_main_root = NULL;
1610 PL_main_start = NULL;
1611 SvREFCNT_dec(PL_main_cv);
1615 oldscope = PL_scopestack_ix;
1616 PL_dowarn = G_WARN_OFF;
1621 parse_body(env,xsinit);
1623 call_list(oldscope, PL_unitcheckav);
1625 call_list(oldscope, PL_checkav);
1632 /* my_exit() was called */
1633 while (PL_scopestack_ix > oldscope)
1636 PL_curstash = PL_defstash;
1638 call_list(oldscope, PL_unitcheckav);
1640 call_list(oldscope, PL_checkav);
1644 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1653 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1657 int argc = PL_origargc;
1658 char **argv = PL_origargv;
1659 const char *scriptname = NULL;
1660 VOL bool dosearch = FALSE;
1661 const char *validarg = "";
1663 register char *s, c;
1664 const char *cddir = NULL;
1665 #ifdef USE_SITECUSTOMIZE
1666 bool minus_f = FALSE;
1668 SV *linestr_sv = newSV_type(SVt_PVIV);
1670 SvGROW(linestr_sv, 80);
1671 sv_setpvn(linestr_sv,"",0);
1673 sv = newSVpvs(""); /* first used for -I flags */
1677 for (argc--,argv++; argc > 0; argc--,argv++) {
1678 if (argv[0][0] != '-' || !argv[0][1])
1682 validarg = " PHOOEY ";
1686 * Can we rely on the kernel to start scripts with argv[1] set to
1687 * contain all #! line switches (the whole line)? (argv[0] is set to
1688 * the interpreter name, argv[2] to the script name; argv[3] and
1689 * above may contain other arguments.)
1696 #ifndef PERL_STRICT_CR
1721 if ((s = moreswitches(s)))
1726 CHECK_MALLOC_TOO_LATE_FOR('t');
1727 if( !PL_tainting ) {
1728 PL_taint_warn = TRUE;
1734 CHECK_MALLOC_TOO_LATE_FOR('T');
1736 PL_taint_warn = FALSE;
1744 #ifdef MACOS_TRADITIONAL
1745 /* ignore -e for Dev:Pseudo argument */
1746 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1749 forbid_setid('e', -1);
1751 PL_e_script = newSVpvs("");
1752 filter_add(read_e_script, NULL);
1755 sv_catpv(PL_e_script, s);
1757 sv_catpv(PL_e_script, argv[1]);
1761 Perl_croak(aTHX_ "No code specified for -%c", c);
1762 sv_catpvs(PL_e_script, "\n");
1766 #ifdef USE_SITECUSTOMIZE
1772 case 'I': /* -I handled both here and in moreswitches() */
1773 forbid_setid('I', -1);
1774 if (!*++s && (s=argv[1]) != NULL) {
1778 STRLEN len = strlen(s);
1779 const char * const p = savepvn(s, len);
1780 incpush(p, TRUE, TRUE, FALSE, FALSE);
1781 sv_catpvs(sv, "-I");
1782 sv_catpvn(sv, p, len);
1787 Perl_croak(aTHX_ "No directory specified for -I");
1790 forbid_setid('P', -1);
1791 PL_preprocess = TRUE;
1795 forbid_setid('S', -1);
1803 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1807 opts_prog = newSVpvs("print Config::myconfig(),");
1809 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1811 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1813 opts = SvCUR(opts_prog);
1815 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1819 # ifdef DEBUG_LEAKING_SCALARS
1820 " DEBUG_LEAKING_SCALARS"
1822 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1823 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1825 # ifdef FAKE_THREADS
1828 # ifdef MULTIPLICITY
1837 # ifdef PERL_DEBUG_READONLY_OPS
1838 " PERL_DEBUG_READONLY_OPS"
1840 # ifdef PERL_DONT_CREATE_GVSV
1841 " PERL_DONT_CREATE_GVSV"
1843 # ifdef PERL_GLOBAL_STRUCT
1844 " PERL_GLOBAL_STRUCT"
1846 # ifdef PERL_IMPLICIT_CONTEXT
1847 " PERL_IMPLICIT_CONTEXT"
1849 # ifdef PERL_IMPLICIT_SYS
1850 " PERL_IMPLICIT_SYS"
1855 # ifdef PERL_MALLOC_WRAP
1858 # ifdef PERL_MEM_LOG
1861 # ifdef PERL_MEM_LOG_ENV
1864 # ifdef PERL_MEM_LOG_ENV_FD
1865 " PERL_MEM_LOG_ENV_FD"
1867 # ifdef PERL_MEM_LOG_STDERR
1868 " PERL_MEM_LOG_STDERR"
1870 # ifdef PERL_MEM_LOG_TIMESTAMP
1871 " PERL_MEM_LOG_TIMESTAMP"
1873 # ifdef PERL_NEED_APPCTX
1876 # ifdef PERL_NEED_TIMESBASE
1877 " PERL_NEED_TIMESBASE"
1879 # ifdef PERL_OLD_COPY_ON_WRITE
1880 " PERL_OLD_COPY_ON_WRITE"
1885 # ifdef PERL_TRACK_MEMPOOL
1886 " PERL_TRACK_MEMPOOL"
1888 # ifdef PERL_USE_SAFE_PUTENV
1889 " PERL_USE_SAFE_PUTENV"
1891 # ifdef PERL_USES_PL_PIDSTATUS
1892 " PERL_USES_PL_PIDSTATUS"
1894 # ifdef PL_OP_SLAB_ALLOC
1897 # ifdef THREADS_HAVE_PIDS
1898 " THREADS_HAVE_PIDS"
1900 # ifdef USE_64_BIT_ALL
1903 # ifdef USE_64_BIT_INT
1906 # ifdef USE_ITHREADS
1909 # ifdef USE_LARGE_FILES
1912 # ifdef USE_LONG_DOUBLE
1918 # ifdef USE_REENTRANT_API
1919 " USE_REENTRANT_API"
1924 # ifdef USE_SITECUSTOMIZE
1925 " USE_SITECUSTOMIZE"
1932 while (SvCUR(opts_prog) > opts+76) {
1933 /* find last space after "options: " and before col 76
1937 char * const pv = SvPV_nolen(opts_prog);
1938 const char c = pv[opts+76];
1940 space = strrchr(pv+opts+26, ' ');
1942 if (!space) break; /* "Can't happen" */
1944 /* break the line before that space */
1947 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1948 STR_WITH_LEN("\\n "));
1951 sv_catpvs(opts_prog,"\\n\",");
1953 #if defined(LOCAL_PATCH_COUNT)
1954 if (LOCAL_PATCH_COUNT > 0) {
1956 sv_catpvs(opts_prog,
1957 "\" Locally applied patches:\\n\",");
1958 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1959 if (PL_localpatches[i])
1960 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1961 0, PL_localpatches[i], 0);
1965 Perl_sv_catpvf(aTHX_ opts_prog,
1966 "\" Built under %s\\n\"",OSNAME);
1969 Perl_sv_catpvf(aTHX_ opts_prog,
1970 ",\" Compiled at %s %s\\n\"",__DATE__,
1973 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1977 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1978 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1979 "sort grep {/^PERL/} keys %ENV; ");
1981 sv_catpvs(opts_prog,
1982 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1984 sv_catpvs(opts_prog,
1985 "print \" \\%ENV:\\n @env\\n\" if @env;"
1986 "print \" \\@INC:\\n @INC\\n\";");
1990 opts_prog = Perl_newSVpvf(aTHX_
1991 "Config::config_vars(qw%c%s%c)",
1995 av_push(PL_preambleav, opts_prog);
1996 /* don't look for script or read stdin */
1997 scriptname = BIT_BUCKET;
2001 PL_doextract = TRUE;
2009 if (!*++s || isSPACE(*s)) {
2013 /* catch use of gnu style long options */
2014 if (strEQ(s, "version")) {
2018 if (strEQ(s, "help")) {
2025 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2031 #ifndef SECURE_INTERNAL_GETENV
2034 (s = PerlEnv_getenv("PERL5OPT")))
2036 const char *popt = s;
2039 if (*s == '-' && *(s+1) == 'T') {
2040 CHECK_MALLOC_TOO_LATE_FOR('T');
2042 PL_taint_warn = FALSE;
2045 char *popt_copy = NULL;
2058 if (!strchr("CDIMUdmtwA", *s))
2059 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2063 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2064 s = popt_copy + (s - popt);
2065 d = popt_copy + (d - popt);
2072 if( !PL_tainting ) {
2073 PL_taint_warn = TRUE;
2083 #ifdef USE_SITECUSTOMIZE
2085 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2086 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2091 scriptname = argv[0];
2094 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2096 else if (scriptname == NULL) {
2098 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2104 /* Set $^X early so that it can be used for relocatable paths in @INC */
2105 assert (!PL_tainted);
2107 S_set_caret_X(aTHX);
2114 = open_script(scriptname, dosearch, sv, &suidscript);
2116 validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv);
2119 # if defined(SIGCHLD) || defined(SIGCLD)
2122 # define SIGCHLD SIGCLD
2124 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2125 if (sigstate == (Sighandler_t) SIG_IGN) {
2126 if (ckWARN(WARN_SIGNAL))
2127 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2128 "Can't ignore signal CHLD, forcing to default");
2129 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2136 #ifdef MACOS_TRADITIONAL
2137 || gMacPerl_AlwaysExtract
2141 /* This will croak if suidscript is >= 0, as -x cannot be used with
2143 forbid_setid('x', suidscript);
2144 /* Hence you can't get here if suidscript >= 0 */
2146 find_beginning(linestr_sv);
2147 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2148 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2152 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2153 CvUNIQUE_on(PL_compcv);
2155 CvPADLIST(PL_compcv) = pad_new(0);
2158 boot_core_UNIVERSAL();
2159 boot_core_xsutils();
2163 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2165 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2171 # ifdef HAS_SOCKS5_INIT
2172 socks5_init(argv[0]);
2178 init_predump_symbols();
2179 /* init_postdump_symbols not currently designed to be called */
2180 /* more than once (ENV isn't cleared first, for example) */
2181 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2183 init_postdump_symbols(argc,argv,env);
2185 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2186 * or explicitly in some platforms.
2187 * locale.c:Perl_init_i18nl10n() if the environment
2188 * look like the user wants to use UTF-8. */
2189 #if defined(__SYMBIAN32__)
2190 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2193 /* Requires init_predump_symbols(). */
2194 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2199 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2200 * and the default open disciplines. */
2201 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2202 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2204 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2205 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2206 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2208 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2209 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2210 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2212 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2213 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2214 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2216 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2217 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2220 sv_setpvn(sv, ":utf8\0:utf8", 11);
2222 sv_setpvn(sv, ":utf8\0", 6);
2225 sv_setpvn(sv, "\0:utf8", 6);
2231 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2232 if (strEQ(s, "unsafe"))
2233 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2234 else if (strEQ(s, "safe"))
2235 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2237 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2241 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2245 PL_xmlfp = PerlIO_stdout();
2247 PL_xmlfp = PerlIO_open(s, "w");
2249 Perl_croak(aTHX_ "Can't open %s", s);
2251 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2253 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2254 PL_madskills = atoi(s);
2255 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2261 lex_start(linestr_sv);
2263 PL_subname = newSVpvs("main");
2265 /* now parse the script */
2267 SETERRNO(0,SS_NORMAL);
2269 #ifdef MACOS_TRADITIONAL
2270 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2272 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2274 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2275 MacPerl_MPWFileName(PL_origfilename));
2279 if (yyparse() || PL_error_count) {
2281 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2283 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2288 CopLINE_set(PL_curcop, 0);
2289 PL_curstash = PL_defstash;
2290 PL_preprocess = FALSE;
2292 SvREFCNT_dec(PL_e_script);
2300 SAVECOPFILE(PL_curcop);
2301 SAVECOPLINE(PL_curcop);
2302 gv_check(PL_defstash);
2309 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2310 dump_mstats("after compilation:");
2319 =for apidoc perl_run
2321 Tells a Perl interpreter to run. See L<perlembed>.
2334 PERL_UNUSED_ARG(my_perl);
2336 oldscope = PL_scopestack_ix;
2344 cxstack_ix = -1; /* start context stack again */
2346 case 0: /* normal completion */
2350 case 2: /* my_exit() */
2351 while (PL_scopestack_ix > oldscope)
2354 PL_curstash = PL_defstash;
2355 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2356 PL_endav && !PL_minus_c)
2357 call_list(oldscope, PL_endav);
2359 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2360 dump_mstats("after execution: ");
2366 POPSTACK_TO(PL_mainstack);
2369 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2380 S_run_body(pTHX_ I32 oldscope)
2383 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2384 PL_sawampersand ? "Enabling" : "Omitting"));
2386 if (!PL_restartop) {
2390 exit(0); /* less likely to core dump than my_exit(0) */
2393 DEBUG_x(dump_all());
2396 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2398 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2402 #ifdef MACOS_TRADITIONAL
2403 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2404 (gMacPerl_ErrorFormat ? "# " : ""),
2405 MacPerl_MPWFileName(PL_origfilename));
2407 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2411 if (PERLDB_SINGLE && PL_DBsingle)
2412 sv_setiv(PL_DBsingle, 1);
2414 call_list(oldscope, PL_initav);
2415 #ifdef PERL_DEBUG_READONLY_OPS
2416 Perl_pending_Slabs_to_ro(aTHX);
2423 PL_op = PL_restartop;
2427 else if (PL_main_start) {
2428 CvDEPTH(PL_main_cv) = 1;
2429 PL_op = PL_main_start;
2437 =head1 SV Manipulation Functions
2439 =for apidoc p||get_sv
2441 Returns the SV of the specified Perl scalar. If C<create> is set and the
2442 Perl variable does not exist then it will be created. If C<create> is not
2443 set and the variable does not exist then NULL is returned.
2449 Perl_get_sv(pTHX_ const char *name, I32 create)
2452 gv = gv_fetchpv(name, create, SVt_PV);
2459 =head1 Array Manipulation Functions
2461 =for apidoc p||get_av
2463 Returns the AV of the specified Perl array. If C<create> is set and the
2464 Perl variable does not exist then it will be created. If C<create> is not
2465 set and the variable does not exist then NULL is returned.
2471 Perl_get_av(pTHX_ const char *name, I32 create)
2473 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2482 =head1 Hash Manipulation Functions
2484 =for apidoc p||get_hv
2486 Returns the HV of the specified Perl hash. If C<create> is set and the
2487 Perl variable does not exist then it will be created. If C<create> is not
2488 set and the variable does not exist then NULL is returned.
2494 Perl_get_hv(pTHX_ const char *name, I32 create)
2496 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2505 =head1 CV Manipulation Functions
2507 =for apidoc p||get_cvn_flags
2509 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2510 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2511 exist then it will be declared (which has the same effect as saying
2512 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2513 then NULL is returned.
2515 =for apidoc p||get_cv
2517 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2523 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2525 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2526 /* XXX this is probably not what they think they're getting.
2527 * It has the same effect as "sub name;", i.e. just a forward
2529 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2530 SV *const sv = newSVpvn(name,len);
2531 SvFLAGS(sv) |= flags & SVf_UTF8;
2532 return newSUB(start_subparse(FALSE, 0),
2533 newSVOP(OP_CONST, 0, sv),
2542 Perl_get_cv(pTHX_ const char *name, I32 flags)
2544 return get_cvn_flags(name, strlen(name), flags);
2547 /* Be sure to refetch the stack pointer after calling these routines. */
2551 =head1 Callback Functions
2553 =for apidoc p||call_argv
2555 Performs a callback to the specified Perl sub. See L<perlcall>.
2561 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2563 /* See G_* flags in cop.h */
2564 /* null terminated arg list */
2572 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2577 return call_pv(sub_name, flags);
2581 =for apidoc p||call_pv
2583 Performs a callback to the specified Perl sub. See L<perlcall>.
2589 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2590 /* name of the subroutine */
2591 /* See G_* flags in cop.h */
2593 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2597 =for apidoc p||call_method
2599 Performs a callback to the specified Perl method. The blessed object must
2600 be on the stack. See L<perlcall>.
2606 Perl_call_method(pTHX_ const char *methname, I32 flags)
2607 /* name of the subroutine */
2608 /* See G_* flags in cop.h */
2610 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2613 /* May be called with any of a CV, a GV, or an SV containing the name. */
2615 =for apidoc p||call_sv
2617 Performs a callback to the Perl sub whose name is in the SV. See
2624 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2625 /* See G_* flags in cop.h */
2628 LOGOP myop; /* fake syntax tree node */
2633 bool oldcatch = CATCH_GET;
2635 OP* const oldop = PL_op;
2638 if (flags & G_DISCARD) {
2643 Zero(&myop, 1, LOGOP);
2644 myop.op_next = NULL;
2645 if (!(flags & G_NOARGS))
2646 myop.op_flags |= OPf_STACKED;
2647 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2648 (flags & G_ARRAY) ? OPf_WANT_LIST :
2653 EXTEND(PL_stack_sp, 1);
2654 *++PL_stack_sp = sv;
2656 oldscope = PL_scopestack_ix;
2658 if (PERLDB_SUB && PL_curstash != PL_debstash
2659 /* Handle first BEGIN of -d. */
2660 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2661 /* Try harder, since this may have been a sighandler, thus
2662 * curstash may be meaningless. */
2663 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2664 && !(flags & G_NODEBUG))
2665 PL_op->op_private |= OPpENTERSUB_DB;
2667 if (flags & G_METHOD) {
2668 Zero(&method_op, 1, UNOP);
2669 method_op.op_next = PL_op;
2670 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2671 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2672 PL_op = (OP*)&method_op;
2675 if (!(flags & G_EVAL)) {
2677 CALL_BODY_SUB((OP*)&myop);
2678 retval = PL_stack_sp - (PL_stack_base + oldmark);
2679 CATCH_SET(oldcatch);
2682 myop.op_other = (OP*)&myop;
2684 create_eval_scope(flags|G_FAKINGEVAL);
2692 CALL_BODY_SUB((OP*)&myop);
2693 retval = PL_stack_sp - (PL_stack_base + oldmark);
2694 if (!(flags & G_KEEPERR))
2695 sv_setpvn(ERRSV,"",0);
2701 /* my_exit() was called */
2702 PL_curstash = PL_defstash;
2705 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2706 Perl_croak(aTHX_ "Callback called exit");
2711 PL_op = PL_restartop;
2715 PL_stack_sp = PL_stack_base + oldmark;
2716 if (flags & G_ARRAY)
2720 *++PL_stack_sp = &PL_sv_undef;
2725 if (PL_scopestack_ix > oldscope)
2726 delete_eval_scope();
2730 if (flags & G_DISCARD) {
2731 PL_stack_sp = PL_stack_base + oldmark;
2740 /* Eval a string. The G_EVAL flag is always assumed. */
2743 =for apidoc p||eval_sv
2745 Tells Perl to C<eval> the string in the SV.
2751 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2753 /* See G_* flags in cop.h */
2757 UNOP myop; /* fake syntax tree node */
2758 VOL I32 oldmark = SP - PL_stack_base;
2761 OP* const oldop = PL_op;
2764 if (flags & G_DISCARD) {
2771 Zero(PL_op, 1, UNOP);
2772 EXTEND(PL_stack_sp, 1);
2773 *++PL_stack_sp = sv;
2775 if (!(flags & G_NOARGS))
2776 myop.op_flags = OPf_STACKED;
2777 myop.op_next = NULL;
2778 myop.op_type = OP_ENTEREVAL;
2779 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2780 (flags & G_ARRAY) ? OPf_WANT_LIST :
2782 if (flags & G_KEEPERR)
2783 myop.op_flags |= OPf_SPECIAL;
2785 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2786 * before a PUSHEVAL, which corrupts the stack after a croak */
2787 TAINT_PROPER("eval_sv()");
2793 CALL_BODY_EVAL((OP*)&myop);
2794 retval = PL_stack_sp - (PL_stack_base + oldmark);
2795 if (!(flags & G_KEEPERR))
2796 sv_setpvn(ERRSV,"",0);
2802 /* my_exit() was called */
2803 PL_curstash = PL_defstash;
2806 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2807 Perl_croak(aTHX_ "Callback called exit");
2812 PL_op = PL_restartop;
2816 PL_stack_sp = PL_stack_base + oldmark;
2817 if (flags & G_ARRAY)
2821 *++PL_stack_sp = &PL_sv_undef;
2827 if (flags & G_DISCARD) {
2828 PL_stack_sp = PL_stack_base + oldmark;
2838 =for apidoc p||eval_pv
2840 Tells Perl to C<eval> the given string and return an SV* result.
2846 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2850 SV* sv = newSVpv(p, 0);
2852 eval_sv(sv, G_SCALAR);
2859 if (croak_on_error && SvTRUE(ERRSV)) {
2860 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2866 /* Require a module. */
2869 =head1 Embedding Functions
2871 =for apidoc p||require_pv
2873 Tells Perl to C<require> the file named by the string argument. It is
2874 analogous to the Perl code C<eval "require '$file'">. It's even
2875 implemented that way; consider using load_module instead.
2880 Perl_require_pv(pTHX_ const char *pv)
2885 PUSHSTACKi(PERLSI_REQUIRE);
2887 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2888 eval_sv(sv_2mortal(sv), G_DISCARD);
2894 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2896 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2899 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2903 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2905 /* This message really ought to be max 23 lines.
2906 * Removed -h because the user already knows that option. Others? */
2908 static const char * const usage_msg[] = {
2909 "-0[octal] specify record separator (\\0, if no argument)",
2910 "-A[mod][=pattern] activate all/given assertions",
2911 "-a autosplit mode with -n or -p (splits $_ into @F)",
2912 "-C[number/list] enables the listed Unicode features",
2913 "-c check syntax only (runs BEGIN and CHECK blocks)",
2914 "-d[:debugger] run program under debugger",
2915 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2916 "-e program one line of program (several -e's allowed, omit programfile)",
2917 "-E program like -e, but enables all optional features",
2918 "-f don't do $sitelib/sitecustomize.pl at startup",
2919 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2920 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2921 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2922 "-l[octal] enable line ending processing, specifies line terminator",
2923 "-[mM][-]module execute \"use/no module...\" before executing program",
2924 "-n assume \"while (<>) { ... }\" loop around program",
2925 "-p assume loop like -n but print line also, like sed",
2926 "-P run program through C preprocessor before compilation",
2927 "-s enable rudimentary parsing for switches after programfile",
2928 "-S look for programfile using PATH environment variable",
2929 "-t enable tainting warnings",
2930 "-T enable tainting checks",
2931 "-u dump core after parsing program",
2932 "-U allow unsafe operations",
2933 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2934 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2935 "-w enable many useful warnings (RECOMMENDED)",
2936 "-W enable all warnings",
2937 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2938 "-X disable all warnings",
2942 const char * const *p = usage_msg;
2944 PerlIO_printf(PerlIO_stdout(),
2945 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2948 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2951 /* convert a string of -D options (or digits) into an int.
2952 * sets *s to point to the char after the options */
2956 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2958 static const char * const usage_msgd[] = {
2959 " Debugging flag values: (see also -d)",
2960 " p Tokenizing and parsing (with v, displays parse stack)",
2961 " s Stack snapshots (with v, displays all stacks)",
2962 " l Context (loop) stack processing",
2963 " t Trace execution",
2964 " o Method and overloading resolution",
2965 " c String/numeric conversions",
2966 " P Print profiling info, preprocessor command for -P, source file input state",
2967 " m Memory allocation",
2968 " f Format processing",
2969 " r Regular expression parsing and execution",
2970 " x Syntax tree dump",
2971 " u Tainting checks",
2972 " H Hash dump -- usurps values()",
2973 " X Scratchpad allocation",
2975 " S Thread synchronization",
2977 " R Include reference counts of dumped variables (eg when using -Ds)",
2978 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2979 " v Verbose: use in conjunction with other flags",
2981 " A Consistency checks on internal structures",
2982 " q quiet - currently only suppresses the 'EXECUTING' message",
2987 /* if adding extra options, remember to update DEBUG_MASK */
2988 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2990 for (; isALNUM(**s); (*s)++) {
2991 const char * const d = strchr(debopts,**s);
2993 i |= 1 << (d - debopts);
2994 else if (ckWARN_d(WARN_DEBUGGING))
2995 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2996 "invalid option -D%c, use -D'' to see choices\n", **s);
2999 else if (isDIGIT(**s)) {
3001 for (; isALNUM(**s); (*s)++) ;
3003 else if (givehelp) {
3004 const char *const *p = usage_msgd;
3005 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3008 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3009 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3010 "-Dp not implemented on this platform\n");
3016 /* This routine handles any switches that can be given during run */
3019 Perl_moreswitches(pTHX_ char *s)
3030 SvREFCNT_dec(PL_rs);
3031 if (s[1] == 'x' && s[2]) {
3032 const char *e = s+=2;
3038 flags = PERL_SCAN_SILENT_ILLDIGIT;
3039 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3040 if (s + numlen < e) {
3041 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3045 PL_rs = newSVpvs("");
3046 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3047 tmps = (U8*)SvPVX(PL_rs);
3048 uvchr_to_utf8(tmps, rschar);
3049 SvCUR_set(PL_rs, UNISKIP(rschar));
3054 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3055 if (rschar & ~((U8)~0))
3056 PL_rs = &PL_sv_undef;
3057 else if (!rschar && numlen >= 2)
3058 PL_rs = newSVpvs("");
3060 char ch = (char)rschar;
3061 PL_rs = newSVpvn(&ch, 1);
3064 sv_setsv(get_sv("/", TRUE), PL_rs);
3069 PL_unicode = parse_unicode_opts( (const char **)&s );
3070 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3076 while (*s && !isSPACE(*s)) ++s;
3077 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3088 forbid_setid('d', -1);
3091 /* -dt indicates to the debugger that threads will be used */
3092 if (*s == 't' && !isALNUM(s[1])) {
3094 my_setenv("PERL5DB_THREADED", "1");
3097 /* The following permits -d:Mod to accepts arguments following an =
3098 in the fashion that -MSome::Mod does. */
3099 if (*s == ':' || *s == '=') {
3101 SV * const sv = newSVpvs("use Devel::");
3103 /* We now allow -d:Module=Foo,Bar */
3104 while(isALNUM(*s) || *s==':') ++s;
3106 sv_catpv(sv, start);
3108 sv_catpvn(sv, start, s-start);
3109 /* Don't use NUL as q// delimiter here, this string goes in the
3111 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3114 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3117 PL_perldb = PERLDB_ALL;
3124 forbid_setid('D', -1);
3126 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3127 #else /* !DEBUGGING */
3128 if (ckWARN_d(WARN_DEBUGGING))
3129 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3130 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3131 for (s++; isALNUM(*s); s++) ;
3136 usage(PL_origargv[0]);
3139 Safefree(PL_inplace);
3140 #if defined(__CYGWIN__) /* do backup extension automagically */
3141 if (*(s+1) == '\0') {
3142 PL_inplace = savepvs(".bak");
3145 #endif /* __CYGWIN__ */
3147 const char * const start = ++s;
3148 while (*s && !isSPACE(*s))
3151 PL_inplace = savepvn(start, s - start);
3155 if (*s == '-') /* Additional switches on #! line. */
3159 case 'I': /* -I handled both here and in parse_body() */
3160 forbid_setid('I', -1);
3162 while (*s && isSPACE(*s))
3167 /* ignore trailing spaces (possibly followed by other switches) */
3169 for (e = p; *e && !isSPACE(*e); e++) ;
3173 } while (*p && *p != '-');
3174 e = savepvn(s, e-s);
3175 incpush(e, TRUE, TRUE, FALSE, FALSE);
3182 Perl_croak(aTHX_ "No directory specified for -I");
3188 SvREFCNT_dec(PL_ors_sv);
3194 PL_ors_sv = newSVpvs("\n");
3195 numlen = 3 + (*s == '0');
3196 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3200 if (RsPARA(PL_rs)) {
3201 PL_ors_sv = newSVpvs("\n\n");
3204 PL_ors_sv = newSVsv(PL_rs);
3209 forbid_setid('A', -1);
3212 char * const start = s;
3213 SV * const sv = newSVpvs("use assertions::activate");
3214 while(isALNUM(*s) || *s == ':') ++s;
3216 sv_catpvs(sv, "::");
3217 sv_catpvn(sv, start, s-start);
3220 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3223 else if (*s != '\0') {
3224 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3226 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3230 forbid_setid('M', -1); /* XXX ? */
3233 forbid_setid('m', -1); /* XXX ? */
3237 const char *use = "use ";
3238 /* -M-foo == 'no foo' */
3239 /* Leading space on " no " is deliberate, to make both
3240 possibilities the same length. */
3241 if (*s == '-') { use = " no "; ++s; }
3242 sv = newSVpvn(use,4);
3244 /* We allow -M'Module qw(Foo Bar)' */
3245 while(isALNUM(*s) || *s==':') ++s;
3247 sv_catpv(sv, start);
3248 if (*(start-1) == 'm') {
3250 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3251 sv_catpvs( sv, " ()");
3255 Perl_croak(aTHX_ "Module name required with -%c option",
3257 sv_catpvn(sv, start, s-start);
3258 sv_catpvs(sv, " split(/,/,q");
3259 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3261 sv_catpvs(sv, "\0)");
3264 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3267 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3278 forbid_setid('s', -1);
3279 PL_doswitches = TRUE;
3293 #ifdef MACOS_TRADITIONAL
3294 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3296 PL_do_undump = TRUE;
3304 if (!sv_derived_from(PL_patchlevel, "version"))
3305 upg_version(PL_patchlevel, TRUE);
3307 PerlIO_printf(PerlIO_stdout(),
3308 Perl_form(aTHX_ "\nThis is perl, %"SVf
3309 #ifdef PERL_PATCHNUM
3310 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3313 SVfARG(vstringify(PL_patchlevel)),
3316 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3317 PerlIO_printf(PerlIO_stdout(),
3318 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3319 SVfARG(vstringify(PL_patchlevel))));
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ " built under %s at %s %s\n",
3322 OSNAME, __DATE__, __TIME__));
3323 PerlIO_printf(PerlIO_stdout(),
3324 Perl_form(aTHX_ " OS Specific Release: %s\n",
3328 #if defined(LOCAL_PATCH_COUNT)
3329 if (LOCAL_PATCH_COUNT > 0)
3330 PerlIO_printf(PerlIO_stdout(),
3331 "\n(with %d registered patch%s, "
3332 "see perl -V for more detail)",
3334 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3337 PerlIO_printf(PerlIO_stdout(),
3338 "\n\nCopyright 1987-2007, Larry Wall\n");
3339 #ifdef MACOS_TRADITIONAL
3340 PerlIO_printf(PerlIO_stdout(),
3341 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3342 "maintained by Chris Nandor\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3351 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3356 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3359 PerlIO_printf(PerlIO_stdout(),
3360 "atariST series port, ++jrb bammi@cadence.com\n");
3363 PerlIO_printf(PerlIO_stdout(),
3364 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3367 PerlIO_printf(PerlIO_stdout(),
3368 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3371 PerlIO_printf(PerlIO_stdout(),
3372 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3375 PerlIO_printf(PerlIO_stdout(),
3376 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3379 PerlIO_printf(PerlIO_stdout(),
3380 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3383 PerlIO_printf(PerlIO_stdout(),
3384 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3387 PerlIO_printf(PerlIO_stdout(),
3388 "MiNT port by Guido Flohr, 1997-1999\n");
3391 PerlIO_printf(PerlIO_stdout(),
3392 "EPOC port by Olaf Flebbe, 1999-2002\n");
3395 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3396 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3399 #ifdef __SYMBIAN32__
3400 PerlIO_printf(PerlIO_stdout(),
3401 "Symbian port by Nokia, 2004-2005\n");
3403 #ifdef BINARY_BUILD_NOTICE
3404 BINARY_BUILD_NOTICE;
3406 PerlIO_printf(PerlIO_stdout(),
3408 Perl may be copied only under the terms of either the Artistic License or the\n\
3409 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3410 Complete documentation for Perl, including FAQ lists, should be found on\n\
3411 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3412 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3415 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3416 PL_dowarn |= G_WARN_ON;
3421 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3422 if (!specialWARN(PL_compiling.cop_warnings))
3423 PerlMemShared_free(PL_compiling.cop_warnings);
3424 PL_compiling.cop_warnings = pWARN_ALL ;
3428 PL_dowarn = G_WARN_ALL_OFF;
3429 if (!specialWARN(PL_compiling.cop_warnings))
3430 PerlMemShared_free(PL_compiling.cop_warnings);
3431 PL_compiling.cop_warnings = pWARN_NONE ;
3436 if (s[1] == '-') /* Additional switches on #! line. */
3441 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3447 #ifdef ALTERNATE_SHEBANG
3448 case 'S': /* OS/2 needs -S on "extproc" line. */
3456 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3461 /* compliments of Tom Christiansen */
3463 /* unexec() can be found in the Gnu emacs distribution */
3464 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3467 Perl_my_unexec(pTHX)
3469 PERL_UNUSED_CONTEXT;
3471 SV * prog = newSVpv(BIN_EXP, 0);
3472 SV * file = newSVpv(PL_origfilename, 0);
3476 sv_catpvs(prog, "/perl");
3477 sv_catpvs(file, ".perldump");
3479 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3480 /* unexec prints msg to stderr in case of failure */
3481 PerlProc_exit(status);
3484 # include <lib$routines.h>
3485 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3486 # elif defined(WIN32) || defined(__CYGWIN__)
3487 Perl_croak(aTHX_ "dump is not supported");
3489 ABORT(); /* for use with undump */
3494 /* initialize curinterp */
3500 # define PERLVAR(var,type)
3501 # define PERLVARA(var,n,type)
3502 # if defined(PERL_IMPLICIT_CONTEXT)
3503 # define PERLVARI(var,type,init) aTHX->var = init;
3504 # define PERLVARIC(var,type,init) aTHX->var = init;
3506 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3507 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3509 # include "intrpvar.h"
3510 # include "thrdvar.h"
3516 # define PERLVAR(var,type)
3517 # define PERLVARA(var,n,type)
3518 # define PERLVARI(var,type,init) PL_##var = init;
3519 # define PERLVARIC(var,type,init) PL_##var = init;
3520 # include "intrpvar.h"
3521 # include "thrdvar.h"
3528 /* As these are inside a structure, PERLVARI isn't capable of initialising
3530 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3531 PL_reg_poscache = PL_reg_starttry = NULL;
3535 S_init_main_stash(pTHX)
3540 PL_curstash = PL_defstash = newHV();
3541 /* We know that the string "main" will be in the global shared string
3542 table, so it's a small saving to use it rather than allocate another
3544 PL_curstname = newSVpvs_share("main");
3545 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3546 /* If we hadn't caused another reference to "main" to be in the shared
3547 string table above, then it would be worth reordering these two,
3548 because otherwise all we do is delete "main" from it as a consequence
3549 of the SvREFCNT_dec, only to add it again with hv_name_set */
3550 SvREFCNT_dec(GvHV(gv));
3551 hv_name_set(PL_defstash, "main", 4, 0);
3552 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3554 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3556 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3557 GvMULTI_on(PL_incgv);
3558 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3559 GvMULTI_on(PL_hintgv);
3560 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3561 SvREFCNT_inc_simple_void(PL_defgv);
3562 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3563 SvREFCNT_inc_simple_void(PL_errgv);
3564 GvMULTI_on(PL_errgv);
3565 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3566 GvMULTI_on(PL_replgv);
3567 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3568 #ifdef PERL_DONT_CREATE_GVSV
3571 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3572 sv_setpvn(ERRSV, "", 0);
3573 PL_curstash = PL_defstash;
3574 CopSTASH_set(&PL_compiling, PL_defstash);
3575 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3576 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3578 /* We must init $/ before switches are processed. */
3579 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3583 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3589 const char *cpp_discard_flag;
3598 PL_origfilename = savepvs("-e");
3601 /* if find_script() returns, it returns a malloc()-ed value */
3602 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3604 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3605 const char *s = scriptname + 8;
3611 * Tell apart "normal" usage of fdscript, e.g.
3612 * with bash on FreeBSD:
3613 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3614 * from usage in suidperl.
3615 * Does any "normal" usage leave garbage after the number???
3616 * Is it a mistake to use a similar /dev/fd/ construct for
3621 * Be supersafe and do some sanity-checks.
3622 * Still, can we be sure we got the right thing?
3625 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3628 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3630 scriptname = savepv(s + 1);
3631 Safefree(PL_origfilename);
3632 PL_origfilename = (char *)scriptname;
3637 CopFILE_free(PL_curcop);
3638 CopFILE_set(PL_curcop, PL_origfilename);
3639 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3640 scriptname = (char *)"";
3641 if (fdscript >= 0) {
3642 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3643 # if defined(HAS_FCNTL) && defined(F_SETFD)
3645 /* ensure close-on-exec */
3646 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3651 Perl_croak(aTHX_ "sperl needs fd script\n"
3652 "You should not call sperl directly; do you need to "
3653 "change a #! line\nfrom sperl to perl?\n");
3656 * Do not open (or do other fancy stuff) while setuid.
3657 * Perl does the open, and hands script to suidperl on a fd;
3658 * suidperl only does some checks, sets up UIDs and re-execs
3659 * perl with that fd as it has always done.
3662 if (*suidscript != 1) {
3663 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3666 else if (PL_preprocess) {
3667 const char * const cpp_cfg = CPPSTDIN;
3668 SV * const cpp = newSVpvs("");
3669 SV * const cmd = newSV(0);
3671 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3672 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3673 if (strEQ(cpp_cfg, "cppstdin"))
3674 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3675 sv_catpv(cpp, cpp_cfg);
3678 sv_catpvs(sv, "-I");
3679 sv_catpv(sv,PRIVLIB_EXP);
3682 DEBUG_P(PerlIO_printf(Perl_debug_log,
3683 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3684 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3687 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3694 cpp_discard_flag = "";
3696 cpp_discard_flag = "-C";
3700 perl = os2_execname(aTHX);
3702 perl = PL_origargv[0];
3706 /* This strips off Perl comments which might interfere with
3707 the C pre-processor, including #!. #line directives are
3708 deliberately stripped to avoid confusion with Perl's version
3709 of #line. FWP played some golf with it so it will fit
3710 into VMS's 255 character buffer.
3713 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3715 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3717 Perl_sv_setpvf(aTHX_ cmd, "\
3718 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3719 perl, quote, code, quote, scriptname, SVfARG(cpp),
3720 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3722 PL_doextract = FALSE;
3724 DEBUG_P(PerlIO_printf(Perl_debug_log,
3725 "PL_preprocess: cmd=\"%s\"\n",
3728 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3732 else if (!*scriptname) {
3733 forbid_setid(0, *suidscript);
3734 PL_rsfp = PerlIO_stdin();
3737 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3738 # if defined(HAS_FCNTL) && defined(F_SETFD)
3740 /* ensure close-on-exec */
3741 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3744 #endif /* IAMSUID */
3746 /* PSz 16 Sep 03 Keep neat error message */
3748 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3750 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3751 CopFILE(PL_curcop), Strerror(errno));
3757 * I_SYSSTATVFS HAS_FSTATVFS
3759 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3760 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3761 * here so that metaconfig picks them up. */
3765 S_fd_on_nosuid_fs(pTHX_ int fd)
3768 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3769 * but is needed also on machines without setreuid.
3770 * Seems safe enough to run as root.
3772 int check_okay = 0; /* able to do all the required sys/libcalls */
3773 int on_nosuid = 0; /* the fd is on a nosuid fs */
3775 * Need to check noexec also: nosuid might not be set, the average
3776 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3778 int on_noexec = 0; /* the fd is on a noexec fs */
3781 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3782 * fstatvfs() is UNIX98.
3783 * fstatfs() is 4.3 BSD.
3784 * ustat()+getmnt() is pre-4.3 BSD.
3785 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3786 * an irrelevant filesystem while trying to reach the right one.
3789 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3791 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3792 defined(HAS_FSTATVFS)
3793 # define FD_ON_NOSUID_CHECK_OKAY
3794 struct statvfs stfs;
3796 check_okay = fstatvfs(fd, &stfs) == 0;
3797 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3799 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3800 on platforms where it is present. */
3801 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3803 # endif /* fstatvfs */
3805 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3806 defined(PERL_MOUNT_NOSUID) && \
3807 defined(PERL_MOUNT_NOEXEC) && \
3808 defined(HAS_FSTATFS) && \
3809 defined(HAS_STRUCT_STATFS) && \
3810 defined(HAS_STRUCT_STATFS_F_FLAGS)
3811 # define FD_ON_NOSUID_CHECK_OKAY
3814 check_okay = fstatfs(fd, &stfs) == 0;
3815 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3816 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3817 # endif /* fstatfs */
3819 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3820 defined(PERL_MOUNT_NOSUID) && \
3821 defined(PERL_MOUNT_NOEXEC) && \
3822 defined(HAS_FSTAT) && \
3823 defined(HAS_USTAT) && \
3824 defined(HAS_GETMNT) && \
3825 defined(HAS_STRUCT_FS_DATA) && \
3827 # define FD_ON_NOSUID_CHECK_OKAY
3830 if (fstat(fd, &fdst) == 0) {
3832 if (ustat(fdst.st_dev, &us) == 0) {
3834 /* NOSTAT_ONE here because we're not examining fields which
3835 * vary between that case and STAT_ONE. */
3836 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3837 size_t cmplen = sizeof(us.f_fname);
3838 if (sizeof(fsd.fd_req.path) < cmplen)
3839 cmplen = sizeof(fsd.fd_req.path);
3840 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3841 fdst.st_dev == fsd.fd_req.dev) {
3843 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3844 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3849 # endif /* fstat+ustat+getmnt */
3851 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3852 defined(HAS_GETMNTENT) && \
3853 defined(HAS_HASMNTOPT) && \
3854 defined(MNTOPT_NOSUID) && \
3855 defined(MNTOPT_NOEXEC)
3856 # define FD_ON_NOSUID_CHECK_OKAY
3857 FILE *mtab = fopen("/etc/mtab", "r");
3858 struct mntent *entry;
3861 if (mtab && (fstat(fd, &stb) == 0)) {
3862 while (entry = getmntent(mtab)) {
3863 if (stat(entry->mnt_dir, &fsb) == 0
3864 && fsb.st_dev == stb.st_dev)
3866 /* found the filesystem */
3868 if (hasmntopt(entry, MNTOPT_NOSUID))
3870 if (hasmntopt(entry, MNTOPT_NOEXEC))
3873 } /* A single fs may well fail its stat(). */
3878 # endif /* getmntent+hasmntopt */
3881 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3883 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3885 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3886 return ((!check_okay) || on_nosuid || on_noexec);
3888 #endif /* IAMSUID */
3891 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3892 int fdscript, int suidscript, SV *linestr_sv)
3897 #endif /* IAMSUID */
3899 /* do we need to emulate setuid on scripts? */
3901 /* This code is for those BSD systems that have setuid #! scripts disabled
3902 * in the kernel because of a security problem. Merely defining DOSUID
3903 * in perl will not fix that problem, but if you have disabled setuid
3904 * scripts in the kernel, this will attempt to emulate setuid and setgid
3905 * on scripts that have those now-otherwise-useless bits set. The setuid
3906 * root version must be called suidperl or sperlN.NNN. If regular perl
3907 * discovers that it has opened a setuid script, it calls suidperl with
3908 * the same argv that it had. If suidperl finds that the script it has
3909 * just opened is NOT setuid root, it sets the effective uid back to the
3910 * uid. We don't just make perl setuid root because that loses the
3911 * effective uid we had before invoking perl, if it was different from the
3914 * Description/comments above do not match current workings:
3915 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3916 * suidperl called with script open and name changed to /dev/fd/N/X;
3917 * suidperl croaks if script is not setuid;
3918 * making perl setuid would be a huge security risk (and yes, that
3919 * would lose any euid we might have had).
3921 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3922 * be defined in suidperl only. suidperl must be setuid root. The
3923 * Configure script will set this up for you if you want it.
3929 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3930 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3931 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3933 const char *linestr;
3937 if (fdscript < 0 || suidscript != 1)
3938 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3940 * Since the script is opened by perl, not suidperl, some of these
3941 * checks are superfluous. Leaving them in probably does not lower
3945 * Do checks even for systems with no HAS_SETREUID.
3946 * We used to swap, then re-swap UIDs with
3948 if (setreuid(PL_euid,PL_uid) < 0
3949 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3950 Perl_croak(aTHX_ "Can't swap uid and euid");
3953 if (setreuid(PL_uid,PL_euid) < 0
3954 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3955 Perl_croak(aTHX_ "Can't reswap uid and euid");
3959 /* On this access check to make sure the directories are readable,
3960 * there is actually a small window that the user could use to make
3961 * filename point to an accessible directory. So there is a faint
3962 * chance that someone could execute a setuid script down in a
3963 * non-accessible directory. I don't know what to do about that.
3964 * But I don't think it's too important. The manual lies when
3965 * it says access() is useful in setuid programs.
3967 * So, access() is pretty useless... but not harmful... do anyway.
3969 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3970 Perl_croak(aTHX_ "Can't access() script\n");
3973 /* If we can swap euid and uid, then we can determine access rights
3974 * with a simple stat of the file, and then compare device and
3975 * inode to make sure we did stat() on the same file we opened.
3976 * Then we just have to make sure he or she can execute it.
3979 * As the script is opened by perl, not suidperl, we do not need to
3980 * care much about access rights.
3982 * The 'script changed' check is needed, or we can get lied to
3983 * about $0 with e.g.
3984 * suidperl /dev/fd/4//bin/x 4<setuidscript
3985 * Without HAS_SETREUID, is it safe to stat() as root?
3987 * Are there any operating systems that pass /dev/fd/xxx for setuid
3988 * scripts, as suggested/described in perlsec(1)? Surely they do not
3989 * pass the script name as we do, so the "script changed" test would
3990 * fail for them... but we never get here with
3991 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3993 * This is one place where we must "lie" about return status: not
3994 * say if the stat() failed. We are doing this as root, and could
3995 * be tricked into reporting existence or not of files that the
3996 * "plain" user cannot even see.
4000 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4001 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4002 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4003 Perl_croak(aTHX_ "Setuid script changed\n");
4007 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4008 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4011 * We used to do this check as the "plain" user (after swapping
4012 * UIDs). But the check for nosuid and noexec filesystem is needed,
4013 * and should be done even without HAS_SETREUID. (Maybe those
4014 * operating systems do not have such mount options anyway...)
4015 * Seems safe enough to do as root.
4017 #if !defined(NO_NOSUID_CHECK)
4018 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4019 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4022 #endif /* IAMSUID */
4024 if (!S_ISREG(PL_statbuf.st_mode)) {
4025 Perl_croak(aTHX_ "Setuid script not plain file\n");
4027 if (PL_statbuf.st_mode & S_IWOTH)
4028 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4029 PL_doswitches = FALSE; /* -s is insecure in suid */
4030 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4031 CopLINE_inc(PL_curcop);
4032 if (sv_gets(linestr_sv, PL_rsfp, 0) == NULL)
4033 Perl_croak(aTHX_ "No #! line");
4034 linestr = SvPV_nolen_const(linestr_sv);
4035 /* required even on Sys V */
4036 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4037 Perl_croak(aTHX_ "No #! line");
4041 /* Sanity check on line length */
4042 s_end = s + strlen(s);
4043 if (s_end == s || (s_end - s) > 4000)
4044 Perl_croak(aTHX_ "Very long #! line");
4045 /* Allow more than a single space after #! */
4046 while (isSPACE(*s)) s++;
4047 /* Sanity check on buffer end */
4048 while ((*s) && !isSPACE(*s)) s++;
4049 for (s2 = s; (s2 > linestr &&
4050 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4051 || s2[-1] == '-')); s2--) ;
4052 /* Sanity check on buffer start */
4053 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4054 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4055 Perl_croak(aTHX_ "Not a perl script");
4056 while (*s == ' ' || *s == '\t') s++;
4058 * #! arg must be what we saw above. They can invoke it by
4059 * mentioning suidperl explicitly, but they may not add any strange
4060 * arguments beyond what #! says if they do invoke suidperl that way.
4063 * The way validarg was set up, we rely on the kernel to start
4064 * scripts with argv[1] set to contain all #! line switches (the
4068 * Check that we got all the arguments listed in the #! line (not
4069 * just that there are no extraneous arguments). Might not matter
4070 * much, as switches from #! line seem to be acted upon (also), and
4071 * so may be checked and trapped in perl. But, security checks must
4072 * be done in suidperl and not deferred to perl. Note that suidperl
4073 * does not get around to parsing (and checking) the switches on
4074 * the #! line (but execs perl sooner).
4075 * Allow (require) a trailing newline (which may be of two
4076 * characters on some architectures?) (but no other trailing
4079 len = strlen(validarg);
4080 if (strEQ(validarg," PHOOEY ") ||
4081 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4082 !((s_end - s) == len+1
4083 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4084 Perl_croak(aTHX_ "Args must match #! line");
4088 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4089 PL_euid == PL_statbuf.st_uid)
4091 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4092 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4093 #endif /* IAMSUID */
4096 PL_euid) { /* oops, we're not the setuid root perl */
4098 * When root runs a setuid script, we do not go through the same
4099 * steps of execing sperl and then perl with fd scripts, but
4100 * simply set up UIDs within the same perl invocation; so do
4101 * not have the same checks (on options, whatever) that we have
4102 * for plain users. No problem really: would have to be a script
4103 * that does not actually work for plain users; and if root is
4104 * foolish and can be persuaded to run such an unsafe script, he
4105 * might run also non-setuid ones, and deserves what he gets.
4107 * Or, we might drop the PL_euid check above (and rely just on
4108 * fdscript to avoid loops), and do the execs
4114 * Pass fd script to suidperl.
4115 * Exec suidperl, substituting fd script for scriptname.
4116 * Pass script name as "subdir" of fd, which perl will grok;
4117 * in fact will use that to distinguish this from "normal"
4118 * usage, see comments above.
4120 PerlIO_rewind(PL_rsfp);
4121 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4122 /* PSz 27 Feb 04 Sanity checks on scriptname */
4123 if ((!scriptname) || (!*scriptname) ) {
4124 Perl_croak(aTHX_ "No setuid script name\n");
4126 if (*scriptname == '-') {
4127 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4128 /* Or we might confuse it with an option when replacing
4129 * name in argument list, below (though we do pointer, not
4130 * string, comparisons).
4133 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4134 if (!PL_origargv[which]) {
4135 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4137 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4138 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4139 #if defined(HAS_FCNTL) && defined(F_SETFD)
4140 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4143 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4144 (int)PERL_REVISION, (int)PERL_VERSION,
4145 (int)PERL_SUBVERSION), PL_origargv);
4147 #endif /* IAMSUID */
4148 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4151 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4153 * This seems back to front: we try HAS_SETEGID first; if not available
4154 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4155 * in the sense that we only want to set EGID; but are there any machines
4156 * with either of the latter, but not the former? Same with UID, later.
4159 (void)setegid(PL_statbuf.st_gid);
4162 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4164 #ifdef HAS_SETRESGID
4165 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4167 PerlProc_setgid(PL_statbuf.st_gid);
4171 if (PerlProc_getegid() != PL_statbuf.st_gid)
4172 Perl_croak(aTHX_ "Can't do setegid!\n");
4174 if (PL_statbuf.st_mode & S_ISUID) {
4175 if (PL_statbuf.st_uid != PL_euid)
4177 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4180 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4182 #ifdef HAS_SETRESUID
4183 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4185 PerlProc_setuid(PL_statbuf.st_uid);
4189 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4190 Perl_croak(aTHX_ "Can't do seteuid!\n");
4192 else if (PL_uid) { /* oops, mustn't run as root */
4194 (void)seteuid((Uid_t)PL_uid);
4197 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4199 #ifdef HAS_SETRESUID
4200 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4202 PerlProc_setuid((Uid_t)PL_uid);
4206 if (PerlProc_geteuid() != PL_uid)
4207 Perl_croak(aTHX_ "Can't do seteuid!\n");
4210 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4211 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4214 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4215 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4216 else if (fdscript < 0 || suidscript != 1)
4217 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4218 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4220 /* PSz 16 Sep 03 Keep neat error message */
4221 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4224 /* We absolutely must clear out any saved ids here, so we */
4225 /* exec the real perl, substituting fd script for scriptname. */
4226 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4228 * It might be thought that using setresgid and/or setresuid (changed to
4229 * set the saved IDs) above might obviate the need to exec, and we could
4230 * go on to "do the perl thing".
4232 * Is there such a thing as "saved GID", and is that set for setuid (but
4233 * not setgid) execution like suidperl? Without exec, it would not be
4234 * cleared for setuid (but not setgid) scripts (or might need a dummy
4237 * We need suidperl to do the exact same argument checking that perl
4238 * does. Thus it cannot be very small; while it could be significantly
4239 * smaller, it is safer (simpler?) to make it essentially the same
4240 * binary as perl (but they are not identical). - Maybe could defer that
4241 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4242 * but prefer to do thorough checks in suidperl itself. Such deferral
4243 * would make suidperl security rely on perl, a design no-no.
4245 * Setuid things should be short and simple, thus easy to understand and
4246 * verify. They should do their "own thing", without influence by
4247 * attackers. It may help if their internal execution flow is fixed,
4248 * regardless of platform: it may be best to exec anyway.
4250 * Suidperl should at least be conceptually simple: a wrapper only,
4251 * never to do any real perl. Maybe we should put
4253 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4255 * into the perly bits.
4257 PerlIO_rewind(PL_rsfp);
4258 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4260 * Keep original arguments: suidperl already has fd script.
4262 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4263 /* if (!PL_origargv[which]) { */
4264 /* errno = EPERM; */
4265 /* Perl_croak(aTHX_ "Permission denied\n"); */
4267 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4268 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4269 #if defined(HAS_FCNTL) && defined(F_SETFD)
4270 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4273 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4274 (int)PERL_REVISION, (int)PERL_VERSION,
4275 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4277 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4278 #endif /* IAMSUID */
4280 PERL_UNUSED_ARG(fdscript);
4281 PERL_UNUSED_ARG(suidscript);
4282 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4283 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4284 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4285 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4287 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4290 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4291 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4292 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4293 /* not set-id, must be wrapped */
4296 PERL_UNUSED_ARG(validarg);
4297 PERL_UNUSED_ARG(scriptname);
4301 S_find_beginning(pTHX_ SV* linestr_sv)
4305 register const char *s2;
4306 #ifdef MACOS_TRADITIONAL
4310 /* skip forward in input to the real script? */
4312 #ifdef MACOS_TRADITIONAL
4313 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4315 while (PL_doextract || gMacPerl_AlwaysExtract) {
4316 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL) {
4317 if (!gMacPerl_AlwaysExtract)
4318 Perl_croak(aTHX_ "No Perl script found in input\n");
4320 if (PL_doextract) /* require explicit override ? */
4321 if (!OverrideExtract(PL_origfilename))
4322 Perl_croak(aTHX_ "User aborted script\n");
4324 PL_doextract = FALSE;
4326 /* Pater peccavi, file does not have #! */
4327 PerlIO_rewind(PL_rsfp);
4332 while (PL_doextract) {
4333 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL)
4334 Perl_croak(aTHX_ "No Perl script found in input\n");
4337 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4338 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4339 PL_doextract = FALSE;
4340 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4342 while (*s == ' ' || *s == '\t') s++;
4344 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4345 || s2[-1] == '_') s2--;
4346 if (strnEQ(s2-4,"perl",4))
4347 while ((s = moreswitches(s)))
4350 #ifdef MACOS_TRADITIONAL
4351 /* We are always searching for the #!perl line in MacPerl,
4352 * so if we find it, still keep the line count correct
4353 * by counting lines we already skipped over
4355 for (; maclines > 0 ; maclines--)
4356 PerlIO_ungetc(PL_rsfp, '\n');
4360 /* gMacPerl_AlwaysExtract is false in MPW tool */
4361 } else if (gMacPerl_AlwaysExtract) {
4373 PL_uid = PerlProc_getuid();
4374 PL_euid = PerlProc_geteuid();
4375 PL_gid = PerlProc_getgid();
4376 PL_egid = PerlProc_getegid();
4378 PL_uid |= PL_gid << 16;
4379 PL_euid |= PL_egid << 16;
4381 /* Should not happen: */
4382 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4383 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4386 * Should go by suidscript, not uid!=euid: why disallow
4387 * system("ls") in scripts run from setuid things?
4388 * Or, is this run before we check arguments and set suidscript?
4389 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4390 * (We never have suidscript, can we be sure to have fdscript?)
4391 * Or must then go by UID checks? See comments in forbid_setid also.
4395 /* This is used very early in the lifetime of the program,
4396 * before even the options are parsed, so PL_tainting has
4397 * not been initialized properly. */
4399 Perl_doing_taint(int argc, char *argv[], char *envp[])
4401 #ifndef PERL_IMPLICIT_SYS
4402 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4403 * before we have an interpreter-- and the whole point of this
4404 * function is to be called at such an early stage. If you are on
4405 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4406 * "tainted because running with altered effective ids', you'll
4407 * have to add your own checks somewhere in here. The two most
4408 * known samples of 'implicitness' are Win32 and NetWare, neither
4409 * of which has much of concept of 'uids'. */
4410 int uid = PerlProc_getuid();
4411 int euid = PerlProc_geteuid();
4412 int gid = PerlProc_getgid();
4413 int egid = PerlProc_getegid();
4420 if (uid && (euid != uid || egid != gid))
4422 #endif /* !PERL_IMPLICIT_SYS */
4423 /* This is a really primitive check; environment gets ignored only
4424 * if -T are the first chars together; otherwise one gets
4425 * "Too late" message. */
4426 if ( argc > 1 && argv[1][0] == '-'
4427 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4432 /* Passing the flag as a single char rather than a string is a slight space
4433 optimisation. The only message that isn't /^-.$/ is
4434 "program input from stdin", which is substituted in place of '\0', which
4435 could never be a command line flag. */
4437 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4440 char string[3] = "-x";
4441 const char *message = "program input from stdin";
4448 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4449 if (PL_euid != PL_uid)
4450 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4451 if (PL_egid != PL_gid)
4452 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4453 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4455 * Checks for UID/GID above "wrong": why disallow
4456 * perl -e 'print "Hello\n"'
4457 * from within setuid things?? Simply drop them: replaced by
4458 * fdscript/suidscript and #ifdef IAMSUID checks below.
4460 * This may be too late for command-line switches. Will catch those on
4461 * the #! line, after finding the script name and setting up
4462 * fdscript/suidscript. Note that suidperl does not get around to
4463 * parsing (and checking) the switches on the #! line, but checks that
4464 * the two sets are identical.
4466 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4467 * instead, or would that be "too late"? (We never have suidscript, can
4468 * we be sure to have fdscript?)
4470 * Catch things with suidscript (in descendant of suidperl), even with
4471 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4472 * below; but I am paranoid.
4474 * Also see comments about root running a setuid script, elsewhere.
4476 if (suidscript >= 0)
4477 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4479 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4480 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4481 #endif /* IAMSUID */
4485 Perl_init_debugger(pTHX)
4488 HV * const ostash = PL_curstash;
4490 PL_curstash = PL_debstash;
4491 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4493 AvREAL_off(PL_dbargs);
4494 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4495 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4496 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4497 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4498 sv_setiv(PL_DBsingle, 0);
4499 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4500 sv_setiv(PL_DBtrace, 0);
4501 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4502 sv_setiv(PL_DBsignal, 0);
4503 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4504 sv_setiv(PL_DBassertion, 0);
4505 PL_curstash = ostash;
4508 #ifndef STRESS_REALLOC
4509 #define REASONABLE(size) (size)
4511 #define REASONABLE(size) (1) /* unreasonable */
4515 Perl_init_stacks(pTHX)
4518 /* start with 128-item stack and 8K cxstack */
4519 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4520 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4521 PL_curstackinfo->si_type = PERLSI_MAIN;
4522 PL_curstack = PL_curstackinfo->si_stack;
4523 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4525 PL_stack_base = AvARRAY(PL_curstack);
4526 PL_stack_sp = PL_stack_base;
4527 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4529 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4532 PL_tmps_max = REASONABLE(128);
4534 Newx(PL_markstack,REASONABLE(32),I32);
4535 PL_markstack_ptr = PL_markstack;
4536 PL_markstack_max = PL_markstack + REASONABLE(32);
4540 Newx(PL_scopestack,REASONABLE(32),I32);
4541 PL_scopestack_ix = 0;
4542 PL_scopestack_max = REASONABLE(32);
4544 Newx(PL_savestack,REASONABLE(128),ANY);
4545 PL_savestack_ix = 0;
4546 PL_savestack_max = REASONABLE(128);
4555 while (PL_curstackinfo->si_next)
4556 PL_curstackinfo = PL_curstackinfo->si_next;
4557 while (PL_curstackinfo) {
4558 PERL_SI *p = PL_curstackinfo->si_prev;
4559 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4560 Safefree(PL_curstackinfo->si_cxstack);
4561 Safefree(PL_curstackinfo);
4562 PL_curstackinfo = p;
4564 Safefree(PL_tmps_stack);
4565 Safefree(PL_markstack);
4566 Safefree(PL_scopestack);
4567 Safefree(PL_savestack);
4572 S_init_predump_symbols(pTHX)
4578 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4579 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4580 GvMULTI_on(PL_stdingv);
4581 io = GvIOp(PL_stdingv);
4582 IoTYPE(io) = IoTYPE_RDONLY;
4583 IoIFP(io) = PerlIO_stdin();
4584 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4586 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4588 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4591 IoTYPE(io) = IoTYPE_WRONLY;
4592 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4594 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4596 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4598 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4599 GvMULTI_on(PL_stderrgv);
4600 io = GvIOp(PL_stderrgv);
4601 IoTYPE(io) = IoTYPE_WRONLY;
4602 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4603 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4605 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4607 PL_statname = newSV(0); /* last filename we did stat on */
4609 Safefree(PL_osname);
4610 PL_osname = savepv(OSNAME);
4614 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4617 argc--,argv++; /* skip name of script */
4618 if (PL_doswitches) {
4619 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4623 if (argv[0][1] == '-' && !argv[0][2]) {
4627 if ((s = strchr(argv[0], '='))) {
4628 const char *const start_name = argv[0] + 1;
4629 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4630 TRUE, SVt_PV)), s + 1);
4633 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4636 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4637 GvMULTI_on(PL_argvgv);
4638 (void)gv_AVadd(PL_argvgv);
4639 av_clear(GvAVn(PL_argvgv));
4640 for (; argc > 0; argc--,argv++) {
4641 SV * const sv = newSVpv(argv[0],0);
4642 av_push(GvAVn(PL_argvgv),sv);
4643 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4644 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4647 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4648 (void)sv_utf8_decode(sv);
4654 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4659 PL_toptarget = newSV_type(SVt_PVFM);
4660 sv_setpvn(PL_toptarget, "", 0);
4661 PL_bodytarget = newSV_type(SVt_PVFM);
4662 sv_setpvn(PL_bodytarget, "", 0);
4663 PL_formtarget = PL_bodytarget;
4667 init_argv_symbols(argc,argv);
4669 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4670 #ifdef MACOS_TRADITIONAL
4671 /* $0 is not majick on a Mac */
4672 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4674 sv_setpv(GvSV(tmpgv),PL_origfilename);
4675 magicname("0", "0", 1);
4678 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4680 bool env_is_not_environ;
4681 GvMULTI_on(PL_envgv);
4682 hv = GvHVn(PL_envgv);
4683 hv_magic(hv, NULL, PERL_MAGIC_env);
4685 #ifdef USE_ENVIRON_ARRAY
4686 /* Note that if the supplied env parameter is actually a copy
4687 of the global environ then it may now point to free'd memory
4688 if the environment has been modified since. To avoid this
4689 problem we treat env==NULL as meaning 'use the default'
4693 env_is_not_environ = env != environ;
4694 if (env_is_not_environ
4695 # ifdef USE_ITHREADS
4696 && PL_curinterp == aTHX
4705 for (; *env; env++) {
4706 if (!(s = strchr(*env,'=')) || s == *env)
4708 #if defined(MSDOS) && !defined(DJGPP)
4713 sv = newSVpv(s+1, 0);
4714 (void)hv_store(hv, *env, s - *env, sv, 0);
4715 if (env_is_not_environ)
4719 #endif /* USE_ENVIRON_ARRAY */
4720 #endif /* !PERL_MICRO */
4723 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4724 SvREADONLY_off(GvSV(tmpgv));
4725 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4726 SvREADONLY_on(GvSV(tmpgv));
4728 #ifdef THREADS_HAVE_PIDS
4729 PL_ppid = (IV)getppid();
4732 /* touch @F array to prevent spurious warnings 20020415 MJD */
4734 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4739 S_init_perllib(pTHX)
4745 s = PerlEnv_getenv("PERL5LIB");
4747 * It isn't possible to delete an environment variable with
4748 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4749 * case we treat PERL5LIB as undefined if it has a zero-length value.
4751 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4752 if (s && *s != '\0')
4756 incpush(s, TRUE, TRUE, TRUE, FALSE);
4758 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4760 /* Treat PERL5?LIB as a possible search list logical name -- the
4761 * "natural" VMS idiom for a Unix path string. We allow each
4762 * element to be a set of |-separated directories for compatibility.
4766 if (my_trnlnm("PERL5LIB",buf,0))
4767 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4769 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4773 /* Use the ~-expanded versions of APPLLIB (undocumented),
4774 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4777 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4781 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4783 #ifdef MACOS_TRADITIONAL
4786 SV * privdir = newSV(0);
4787 char * macperl = PerlEnv_getenv("MACPERL");
4792 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4793 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4794 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4795 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4796 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4797 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4799 SvREFCNT_dec(privdir);
4802 incpush(":", FALSE, FALSE, TRUE, FALSE);
4805 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4808 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4810 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4814 /* sitearch is always relative to sitelib on Windows for
4815 * DLL-based path intuition to work correctly */
4816 # if !defined(WIN32)
4817 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4823 /* this picks up sitearch as well */
4824 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4826 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4830 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4831 /* Search for version-specific dirs below here */
4832 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4835 #ifdef PERL_VENDORARCH_EXP
4836 /* vendorarch is always relative to vendorlib on Windows for
4837 * DLL-based path intuition to work correctly */
4838 # if !defined(WIN32)
4839 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4843 #ifdef PERL_VENDORLIB_EXP
4845 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4847 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4851 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4852 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4855 #ifdef PERL_OTHERLIBDIRS
4856 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4860 incpush(".", FALSE, FALSE, TRUE, FALSE);
4861 #endif /* MACOS_TRADITIONAL */
4864 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4865 # define PERLLIB_SEP ';'
4868 # define PERLLIB_SEP '|'
4870 # if defined(MACOS_TRADITIONAL)
4871 # define PERLLIB_SEP ','
4873 # define PERLLIB_SEP ':'
4877 #ifndef PERLLIB_MANGLE
4878 # define PERLLIB_MANGLE(s,n) (s)
4881 /* Push a directory onto @INC if it exists.
4882 Generate a new SV if we do this, to save needing to copy the SV we push
4885 S_incpush_if_exists(pTHX_ SV *dir)
4889 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4890 S_ISDIR(tmpstatbuf.st_mode)) {
4891 av_push(GvAVn(PL_incgv), dir);
4898 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4903 const char *p = dir;
4908 if (addsubdirs || addoldvers) {
4912 /* Break at all separators */
4914 SV *libdir = newSV(0);
4917 /* skip any consecutive separators */
4919 while ( *p == PERLLIB_SEP ) {
4920 /* Uncomment the next line for PATH semantics */
4921 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4926 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4927 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4932 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4933 p = NULL; /* break out */
4935 #ifdef MACOS_TRADITIONAL
4936 if (!strchr(SvPVX(libdir), ':')) {
4939 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4941 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4942 sv_catpvs(libdir, ":");
4945 /* Do the if() outside the #ifdef to avoid warnings about an unused
4948 #ifdef PERL_RELOCATABLE_INC
4950 * Relocatable include entries are marked with a leading .../
4953 * 0: Remove that leading ".../"
4954 * 1: Remove trailing executable name (anything after the last '/')
4955 * from the perl path to give a perl prefix
4957 * While the @INC element starts "../" and the prefix ends with a real
4958 * directory (ie not . or ..) chop that real directory off the prefix
4959 * and the leading "../" from the @INC element. ie a logical "../"
4961 * Finally concatenate the prefix and the remainder of the @INC element
4962 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4963 * generates /usr/local/lib/perl5
4965 const char *libpath = SvPVX(libdir);
4966 STRLEN libpath_len = SvCUR(libdir);
4967 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4969 SV * const caret_X = get_sv("\030", 0);
4970 /* Going to use the SV just as a scratch buffer holding a C
4976 /* $^X is *the* source of taint if tainting is on, hence
4977 SvPOK() won't be true. */
4979 assert(SvPOKp(caret_X));
4980 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4981 /* Firstly take off the leading .../
4982 If all else fail we'll do the paths relative to the current
4984 sv_chop(libdir, libpath + 4);
4985 /* Don't use SvPV as we're intentionally bypassing taining,
4986 mortal copies that the mg_get of tainting creates, and
4987 corruption that seems to come via the save stack.
4988 I guess that the save stack isn't correctly set up yet. */
4989 libpath = SvPVX(libdir);
4990 libpath_len = SvCUR(libdir);
4992 /* This would work more efficiently with memrchr, but as it's
4993 only a GNU extension we'd need to probe for it and
4994 implement our own. Not hard, but maybe not worth it? */
4996 prefix = SvPVX(prefix_sv);
4997 lastslash = strrchr(prefix, '/');
4999 /* First time in with the *lastslash = '\0' we just wipe off
5000 the trailing /perl from (say) /usr/foo/bin/perl
5004 while ((*lastslash = '\0'), /* Do that, come what may. */
5005 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5006 && (lastslash = strrchr(prefix, '/')))) {
5007 if (lastslash[1] == '\0'
5008 || (lastslash[1] == '.'
5009 && (lastslash[2] == '/' /* ends "/." */
5010 || (lastslash[2] == '/'
5011 && lastslash[3] == '/' /* or "/.." */
5013 /* Prefix ends "/" or "/." or "/..", any of which
5014 are fishy, so don't do any more logical cleanup.
5018 /* Remove leading "../" from path */
5021 /* Next iteration round the loop removes the last
5022 directory name from prefix by writing a '\0' in
5023 the while clause. */
5025 /* prefix has been terminated with a '\0' to the correct
5026 length. libpath points somewhere into the libdir SV.
5027 We need to join the 2 with '/' and drop the result into
5029 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5030 SvREFCNT_dec(libdir);
5031 /* And this is the new libdir. */
5034 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5035 /* Need to taint reloccated paths if running set ID */
5036 SvTAINTED_on(libdir);
5039 SvREFCNT_dec(prefix_sv);
5044 * BEFORE pushing libdir onto @INC we may first push version- and
5045 * archname-specific sub-directories.
5047 if (addsubdirs || addoldvers) {
5048 #ifdef PERL_INC_VERSION_LIST
5049 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5050 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5051 const char * const *incver;
5057 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5059 while (unix[len-1] == '/') len--; /* Cosmetic */
5060 sv_usepvn(libdir,unix,len);
5063 PerlIO_printf(Perl_error_log,
5064 "Failed to unixify @INC element \"%s\"\n",
5068 #ifdef MACOS_TRADITIONAL
5069 #define PERL_AV_SUFFIX_FMT ""
5070 #define PERL_ARCH_FMT "%s:"
5071 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5073 #define PERL_AV_SUFFIX_FMT "/"
5074 #define PERL_ARCH_FMT "/%s"
5075 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5077 /* .../version/archname if -d .../version/archname */
5078 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5080 (int)PERL_REVISION, (int)PERL_VERSION,
5081 (int)PERL_SUBVERSION, ARCHNAME);
5082 subdir = S_incpush_if_exists(aTHX_ subdir);
5084 /* .../version if -d .../version */
5085 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5087 (int)PERL_REVISION, (int)PERL_VERSION,
5088 (int)PERL_SUBVERSION);
5089 subdir = S_incpush_if_exists(aTHX_ subdir);
5091 /* .../archname if -d .../archname */
5092 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5093 SVfARG(libdir), ARCHNAME);
5094 subdir = S_incpush_if_exists(aTHX_ subdir);
5098 #ifdef PERL_INC_VERSION_LIST
5100 for (incver = incverlist; *incver; incver++) {
5101 /* .../xxx if -d .../xxx */
5102 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5103 SVfARG(libdir), *incver);
5104 subdir = S_incpush_if_exists(aTHX_ subdir);
5110 /* finally push this lib directory on the end of @INC */
5111 av_push(GvAVn(PL_incgv), libdir);
5114 assert (SvREFCNT(subdir) == 1);
5115 SvREFCNT_dec(subdir);
5121 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5125 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5131 while (av_len(paramList) >= 0) {
5132 cv = (CV*)av_shift(paramList);
5134 if (paramList == PL_beginav) {
5135 /* save PL_beginav for compiler */
5136 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5138 else if (paramList == PL_checkav) {
5139 /* save PL_checkav for compiler */
5140 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5142 else if (paramList == PL_unitcheckav) {
5143 /* save PL_unitcheckav for compiler */
5144 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5155 PL_madskills |= 16384;
5160 PL_madskills &= ~16384;
5163 (void)SvPV_const(atsv, len);
5165 PL_curcop = &PL_compiling;
5166 CopLINE_set(PL_curcop, oldline);
5167 if (paramList == PL_beginav)
5168 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5170 Perl_sv_catpvf(aTHX_ atsv,
5171 "%s failed--call queue aborted",
5172 paramList == PL_checkav ? "CHECK"
5173 : paramList == PL_initav ? "INIT"
5174 : paramList == PL_unitcheckav ? "UNITCHECK"
5176 while (PL_scopestack_ix > oldscope)
5179 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5186 /* my_exit() was called */
5187 while (PL_scopestack_ix > oldscope)
5190 PL_curstash = PL_defstash;
5191 PL_curcop = &PL_compiling;
5192 CopLINE_set(PL_curcop, oldline);
5194 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5195 if (paramList == PL_beginav)
5196 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5198 Perl_croak(aTHX_ "%s failed--call queue aborted",
5199 paramList == PL_checkav ? "CHECK"
5200 : paramList == PL_initav ? "INIT"
5201 : paramList == PL_unitcheckav ? "UNITCHECK"
5208 PL_curcop = &PL_compiling;
5209 CopLINE_set(PL_curcop, oldline);
5212 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5221 Perl_my_exit(pTHX_ U32 status)
5224 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5225 (void*)thr, (unsigned long) status));
5234 STATUS_EXIT_SET(status);
5241 Perl_my_failure_exit(pTHX)
5245 /* We have been called to fall on our sword. The desired exit code
5246 * should be already set in STATUS_UNIX, but could be shifted over
5247 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5250 * If an error code has not been set, then force the issue.
5252 if (MY_POSIX_EXIT) {
5254 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5255 * the exit code when there isn't an error.
5258 if (STATUS_UNIX == 0)
5259 STATUS_UNIX_EXIT_SET(255);
5261 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5263 /* The exit code could have been set by $? or vmsish which
5264 * means that it may not be fatal. So convert
5265 * success/warning codes to fatal.
5267 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5268 STATUS_UNIX_EXIT_SET(255);
5272 /* Traditionally Perl on VMS always expects a Fatal Error. */
5273 if (vaxc$errno & 1) {
5275 /* So force success status to failure */
5276 if (STATUS_NATIVE & 1)
5281 STATUS_UNIX = EINTR; /* In case something cares */
5286 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5288 /* Encode the severity code */
5289 severity = STATUS_NATIVE & STS$M_SEVERITY;
5290 STATUS_UNIX = (severity ? severity : 1) << 8;
5292 /* Perl expects this to be a fatal error */
5293 if (severity != STS$K_SEVERE)
5302 STATUS_UNIX_SET(errno);
5304 exitstatus = STATUS_UNIX >> 8;
5305 if (exitstatus & 255)
5306 STATUS_UNIX_SET(exitstatus);
5308 STATUS_UNIX_SET(255);
5315 S_my_exit_jump(pTHX)
5320 SvREFCNT_dec(PL_e_script);
5324 POPSTACK_TO(PL_mainstack);
5332 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5335 const char * const p = SvPVX_const(PL_e_script);
5336 const char *nl = strchr(p, '\n');
5338 PERL_UNUSED_ARG(idx);
5339 PERL_UNUSED_ARG(maxlen);
5341 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5343 filter_del(read_e_script);
5346 sv_catpvn(buf_sv, p, nl-p);
5347 sv_chop(PL_e_script, nl);
5353 * c-indentation-style: bsd
5355 * indent-tabs-mode: t
5358 * ex: set ts=8 sts=4 sw=4 noet: