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");
301 SET_NUMERIC_STANDARD();
303 #if defined(LOCAL_PATCH_COUNT)
304 PL_localpatches = local_patches; /* For possible -v */
307 #ifdef HAVE_INTERP_INTERN
311 PerlIO_init(aTHX); /* Hook to IO system */
313 PL_fdpid = newAV(); /* for remembering popen pids by fd */
314 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
315 PL_errors = newSVpvs("");
316 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
317 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
318 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
320 /* First entry is an array of empty elements */
321 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
322 PL_regex_pad = AvARRAY(PL_regex_padav);
324 #ifdef USE_REENTRANT_API
325 Perl_reentrant_init(aTHX);
328 /* Note that strtab is a rather special HV. Assumptions are made
329 about not iterating on it, and not adding tie magic to it.
330 It is properly deallocated in perl_destruct() */
333 HvSHAREKEYS_off(PL_strtab); /* mandatory */
334 hv_ksplit(PL_strtab, 512);
336 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
337 _dyld_lookup_and_bind
338 ("__environ", (unsigned long *) &environ_pointer, NULL);
342 # ifdef USE_ENVIRON_ARRAY
343 PL_origenviron = environ;
347 /* Use sysconf(_SC_CLK_TCK) if available, if not
348 * available or if the sysconf() fails, use the HZ.
349 * BeOS has those, but returns the wrong value.
350 * The HZ if not originally defined has been by now
351 * been defined as CLK_TCK, if available. */
352 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
353 PL_clocktick = sysconf(_SC_CLK_TCK);
354 if (PL_clocktick <= 0)
358 PL_stashcache = newHV();
360 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
361 (int)PERL_VERSION, (int)PERL_SUBVERSION);
364 if (!PL_mmap_page_size) {
365 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
367 SETERRNO(0, SS_NORMAL);
369 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
371 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
373 if ((long) PL_mmap_page_size < 0) {
375 SV * const error = ERRSV;
376 SvUPGRADE(error, SVt_PV);
377 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
380 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
384 # ifdef HAS_GETPAGESIZE
385 PL_mmap_page_size = getpagesize();
387 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
388 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
392 if (PL_mmap_page_size <= 0)
393 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
394 (IV) PL_mmap_page_size);
396 #endif /* HAS_MMAP */
398 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
399 PL_timesbase.tms_utime = 0;
400 PL_timesbase.tms_stime = 0;
401 PL_timesbase.tms_cutime = 0;
402 PL_timesbase.tms_cstime = 0;
409 =for apidoc nothreadhook
411 Stub that provides thread hook for perl_destruct when there are
418 Perl_nothreadhook(pTHX)
424 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
426 Perl_dump_sv_child(pTHX_ SV *sv)
429 const int sock = PL_dumper_fd;
430 const int debug_fd = PerlIO_fileno(Perl_debug_log);
431 union control_un control;
434 struct cmsghdr *cmptr;
436 unsigned char buffer[256];
438 if(sock == -1 || debug_fd == -1)
441 PerlIO_flush(Perl_debug_log);
443 /* All these shenanigans are to pass a file descriptor over to our child for
444 it to dump out to. We can't let it hold open the file descriptor when it
445 forks, as the file descriptor it will dump to can turn out to be one end
446 of pipe that some other process will wait on for EOF. (So as it would
447 be open, the wait would be forever.) */
449 msg.msg_control = control.control;
450 msg.msg_controllen = sizeof(control.control);
451 /* We're a connected socket so we don't need a destination */
457 cmptr = CMSG_FIRSTHDR(&msg);
458 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
459 cmptr->cmsg_level = SOL_SOCKET;
460 cmptr->cmsg_type = SCM_RIGHTS;
461 *((int *)CMSG_DATA(cmptr)) = 1;
463 vec[0].iov_base = (void*)&sv;
464 vec[0].iov_len = sizeof(sv);
465 got = sendmsg(sock, &msg, 0);
468 perror("Debug leaking scalars parent sendmsg failed");
471 if(got < sizeof(sv)) {
472 perror("Debug leaking scalars parent short sendmsg");
476 /* Return protocol is
478 unsigned char: length of location string (0 for empty)
479 unsigned char*: string (not terminated)
481 vec[0].iov_base = (void*)&returned_errno;
482 vec[0].iov_len = sizeof(returned_errno);
483 vec[1].iov_base = buffer;
486 got = readv(sock, vec, 2);
489 perror("Debug leaking scalars parent read failed");
490 PerlIO_flush(PerlIO_stderr());
493 if(got < sizeof(returned_errno) + 1) {
494 perror("Debug leaking scalars parent short read");
495 PerlIO_flush(PerlIO_stderr());
500 got = read(sock, buffer + 1, *buffer);
502 perror("Debug leaking scalars parent read 2 failed");
503 PerlIO_flush(PerlIO_stderr());
508 perror("Debug leaking scalars parent short read 2");
509 PerlIO_flush(PerlIO_stderr());
514 if (returned_errno || *buffer) {
515 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
516 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
517 returned_errno, strerror(returned_errno));
523 =for apidoc perl_destruct
525 Shuts down a Perl interpreter. See L<perlembed>.
534 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
536 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
540 PERL_UNUSED_ARG(my_perl);
542 /* wait for all pseudo-forked children to finish */
543 PERL_WAIT_FOR_CHILDREN;
545 destruct_level = PL_perl_destruct_level;
548 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
550 const int i = atoi(s);
551 if (destruct_level < i)
557 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
563 if (PL_endav && !PL_minus_c)
564 call_list(PL_scopestack_ix, PL_endav);
570 /* Need to flush since END blocks can produce output */
573 if (CALL_FPTR(PL_threadhook)(aTHX)) {
574 /* Threads hook has vetoed further cleanup */
575 PL_veto_cleanup = TRUE;
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
580 if (destruct_level != 0) {
581 /* Fork here to create a child. Our child's job is to preserve the
582 state of scalars prior to destruction, so that we can instruct it
583 to dump any scalars that we later find have leaked.
584 There's no subtlety in this code - it assumes POSIX, and it doesn't
588 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
589 perror("Debug leaking scalars socketpair failed");
595 perror("Debug leaking scalars fork failed");
599 /* We are the child */
600 const int sock = fd[1];
601 const int debug_fd = PerlIO_fileno(Perl_debug_log);
604 /* Our success message is an integer 0, and a char 0 */
605 static const char success[sizeof(int) + 1];
609 /* We need to close all other file descriptors otherwise we end up
610 with interesting hangs, where the parent closes its end of a
611 pipe, and sits waiting for (another) child to terminate. Only
612 that child never terminates, because it never gets EOF, because
613 we also have the far end of the pipe open. We even need to
614 close the debugging fd, because sometimes it happens to be one
615 end of a pipe, and a process is waiting on the other end for
616 EOF. Normally it would be closed at some point earlier in
617 destruction, but if we happen to cause the pipe to remain open,
618 EOF never occurs, and we get an infinite hang. Hence all the
619 games to pass in a file descriptor if it's actually needed. */
621 f = sysconf(_SC_OPEN_MAX);
623 where = "sysconf failed";
634 union control_un control;
637 struct cmsghdr *cmptr;
641 msg.msg_control = control.control;
642 msg.msg_controllen = sizeof(control.control);
643 /* We're a connected socket so we don't need a source */
647 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
649 vec[0].iov_base = (void*)⌖
650 vec[0].iov_len = sizeof(target);
652 got = recvmsg(sock, &msg, 0);
657 where = "recv failed";
660 if(got < sizeof(target)) {
661 where = "short recv";
665 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
669 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
670 where = "wrong cmsg_len";
673 if(cmptr->cmsg_level != SOL_SOCKET) {
674 where = "wrong cmsg_level";
677 if(cmptr->cmsg_type != SCM_RIGHTS) {
678 where = "wrong cmsg_type";
682 got_fd = *(int*)CMSG_DATA(cmptr);
683 /* For our last little bit of trickery, put the file descriptor
684 back into Perl_debug_log, as if we never actually closed it
686 if(got_fd != debug_fd) {
687 if (dup2(got_fd, debug_fd) == -1) {
694 PerlIO_flush(Perl_debug_log);
696 got = write(sock, &success, sizeof(success));
699 where = "write failed";
702 if(got < sizeof(success)) {
703 where = "short write";
710 int send_errno = errno;
711 unsigned char length = (unsigned char) strlen(where);
712 struct iovec failure[3] = {
713 {(void*)&send_errno, sizeof(send_errno)},
715 {(void*)where, length}
717 int got = writev(sock, failure, 3);
718 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
719 in the parent if we try to read from the socketpair after the
720 child has exited, even if there was data to read.
721 So sleep a bit to give the parent a fighting chance of
724 _exit((got == -1) ? errno : 0);
728 PL_dumper_fd = fd[0];
733 /* We must account for everything. */
735 /* Destroy the main CV and syntax tree */
736 /* Do this now, because destroying ops can cause new SVs to be generated
737 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
738 PL_curcop to point to a valid op from which the filename structure
740 PL_curcop = &PL_compiling;
742 /* ensure comppad/curpad to refer to main's pad */
743 if (CvPADLIST(PL_main_cv)) {
744 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
746 op_free(PL_main_root);
749 PL_main_start = NULL;
750 SvREFCNT_dec(PL_main_cv);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
761 if (PL_sv_objcount) {
763 * Try to destruct global references. We do this first so that the
764 * destructors and destructees still exist. Some sv's might remain.
765 * Non-referenced objects are on their own.
769 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
770 PL_defoutgv = NULL; /* may have been freed */
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 /* jettison our possibly duplicated environment */
789 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
790 * so we certainly shouldn't free it here
793 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
794 if (environ != PL_origenviron && !PL_use_safe_putenv
796 /* only main thread can free environ[0] contents */
797 && PL_curinterp == aTHX
803 for (i = 0; environ[i]; i++)
804 safesysfree(environ[i]);
806 /* Must use safesysfree() when working with environ. */
807 safesysfree(environ);
809 environ = PL_origenviron;
812 #endif /* !PERL_MICRO */
814 if (destruct_level == 0) {
816 DEBUG_P(debprofdump());
818 #if defined(PERLIO_LAYERS)
819 /* No more IO - including error messages ! */
820 PerlIO_cleanup(aTHX);
823 CopFILE_free(&PL_compiling);
824 CopSTASH_free(&PL_compiling);
826 /* The exit() function will do everything that needs doing. */
830 /* reset so print() ends up where we expect */
834 /* the syntax tree is shared between clones
835 * so op_free(PL_main_root) only ReREFCNT_dec's
836 * REGEXPs in the parent interpreter
837 * we need to manually ReREFCNT_dec for the clones
840 I32 i = AvFILLp(PL_regex_padav) + 1;
841 SV * const * const ary = AvARRAY(PL_regex_padav);
844 SV * const resv = ary[--i];
846 if (SvFLAGS(resv) & SVf_BREAK) {
847 /* this is PL_reg_curpm, already freed
848 * flag is set in regexec.c:S_regtry
850 SvFLAGS(resv) &= ~SVf_BREAK;
852 else if(SvREPADTMP(resv)) {
853 SvREPADTMP_off(resv);
855 else if(SvIOKp(resv)) {
856 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
861 SvREFCNT_dec(PL_regex_padav);
862 PL_regex_padav = NULL;
866 SvREFCNT_dec((SV*) PL_stashcache);
867 PL_stashcache = NULL;
869 /* loosen bonds of global variables */
871 /* XXX can PL_parser still be non-null here? */
872 if(PL_parser && PL_parser->rsfp) {
873 (void)PerlIO_close(PL_parser->rsfp);
874 PL_parser->rsfp = NULL;
878 Safefree(PL_splitstr);
883 PL_preprocess = FALSE;
889 PL_doswitches = FALSE;
890 PL_dowarn = G_WARN_OFF;
891 PL_doextract = FALSE;
892 PL_sawampersand = FALSE; /* must save all match strings */
895 Safefree(PL_inplace);
897 SvREFCNT_dec(PL_patchlevel);
900 SvREFCNT_dec(PL_e_script);
906 /* magical thingies */
908 SvREFCNT_dec(PL_ofs_sv); /* $, */
911 SvREFCNT_dec(PL_ors_sv); /* $\ */
914 SvREFCNT_dec(PL_rs); /* $/ */
917 Safefree(PL_osname); /* $^O */
920 SvREFCNT_dec(PL_statname);
924 /* defgv, aka *_ should be taken care of elsewhere */
926 /* clean up after study() */
927 SvREFCNT_dec(PL_lastscream);
928 PL_lastscream = NULL;
929 Safefree(PL_screamfirst);
931 Safefree(PL_screamnext);
935 Safefree(PL_efloatbuf);
939 /* startup and shutdown function lists */
940 SvREFCNT_dec(PL_beginav);
941 SvREFCNT_dec(PL_beginav_save);
942 SvREFCNT_dec(PL_endav);
943 SvREFCNT_dec(PL_checkav);
944 SvREFCNT_dec(PL_checkav_save);
945 SvREFCNT_dec(PL_unitcheckav);
946 SvREFCNT_dec(PL_unitcheckav_save);
947 SvREFCNT_dec(PL_initav);
949 PL_beginav_save = NULL;
952 PL_checkav_save = NULL;
953 PL_unitcheckav = NULL;
954 PL_unitcheckav_save = NULL;
957 /* shortcuts just get cleared */
966 PL_last_in_gv = NULL;
974 PL_DBassertion = NULL;
979 SvREFCNT_dec(PL_argvout_stack);
980 PL_argvout_stack = NULL;
982 SvREFCNT_dec(PL_modglobal);
984 SvREFCNT_dec(PL_preambleav);
985 PL_preambleav = NULL;
986 SvREFCNT_dec(PL_subname);
988 #ifdef PERL_USES_PL_PIDSTATUS
989 SvREFCNT_dec(PL_pidstatus);
992 SvREFCNT_dec(PL_toptarget);
994 SvREFCNT_dec(PL_bodytarget);
995 PL_bodytarget = NULL;
996 PL_formtarget = NULL;
998 /* free locale stuff */
999 #ifdef USE_LOCALE_COLLATE
1000 Safefree(PL_collation_name);
1001 PL_collation_name = NULL;
1004 #ifdef USE_LOCALE_NUMERIC
1005 Safefree(PL_numeric_name);
1006 PL_numeric_name = NULL;
1007 SvREFCNT_dec(PL_numeric_radix_sv);
1008 PL_numeric_radix_sv = NULL;
1011 /* clear utf8 character classes */
1012 SvREFCNT_dec(PL_utf8_alnum);
1013 SvREFCNT_dec(PL_utf8_alnumc);
1014 SvREFCNT_dec(PL_utf8_ascii);
1015 SvREFCNT_dec(PL_utf8_alpha);
1016 SvREFCNT_dec(PL_utf8_space);
1017 SvREFCNT_dec(PL_utf8_cntrl);
1018 SvREFCNT_dec(PL_utf8_graph);
1019 SvREFCNT_dec(PL_utf8_digit);
1020 SvREFCNT_dec(PL_utf8_upper);
1021 SvREFCNT_dec(PL_utf8_lower);
1022 SvREFCNT_dec(PL_utf8_print);
1023 SvREFCNT_dec(PL_utf8_punct);
1024 SvREFCNT_dec(PL_utf8_xdigit);
1025 SvREFCNT_dec(PL_utf8_mark);
1026 SvREFCNT_dec(PL_utf8_toupper);
1027 SvREFCNT_dec(PL_utf8_totitle);
1028 SvREFCNT_dec(PL_utf8_tolower);
1029 SvREFCNT_dec(PL_utf8_tofold);
1030 SvREFCNT_dec(PL_utf8_idstart);
1031 SvREFCNT_dec(PL_utf8_idcont);
1032 PL_utf8_alnum = NULL;
1033 PL_utf8_alnumc = NULL;
1034 PL_utf8_ascii = NULL;
1035 PL_utf8_alpha = NULL;
1036 PL_utf8_space = NULL;
1037 PL_utf8_cntrl = NULL;
1038 PL_utf8_graph = NULL;
1039 PL_utf8_digit = NULL;
1040 PL_utf8_upper = NULL;
1041 PL_utf8_lower = NULL;
1042 PL_utf8_print = NULL;
1043 PL_utf8_punct = NULL;
1044 PL_utf8_xdigit = NULL;
1045 PL_utf8_mark = NULL;
1046 PL_utf8_toupper = NULL;
1047 PL_utf8_totitle = NULL;
1048 PL_utf8_tolower = NULL;
1049 PL_utf8_tofold = NULL;
1050 PL_utf8_idstart = NULL;
1051 PL_utf8_idcont = NULL;
1053 if (!specialWARN(PL_compiling.cop_warnings))
1054 PerlMemShared_free(PL_compiling.cop_warnings);
1055 PL_compiling.cop_warnings = NULL;
1056 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1057 PL_compiling.cop_hints_hash = NULL;
1058 CopFILE_free(&PL_compiling);
1059 CopSTASH_free(&PL_compiling);
1061 /* Prepare to destruct main symbol table. */
1066 SvREFCNT_dec(PL_curstname);
1067 PL_curstname = NULL;
1069 /* clear queued errors */
1070 SvREFCNT_dec(PL_errors);
1073 SvREFCNT_dec(PL_isarev);
1076 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1077 if (PL_scopestack_ix != 0)
1078 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1079 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1080 (long)PL_scopestack_ix);
1081 if (PL_savestack_ix != 0)
1082 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1083 "Unbalanced saves: %ld more saves than restores\n",
1084 (long)PL_savestack_ix);
1085 if (PL_tmps_floor != -1)
1086 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1087 (long)PL_tmps_floor + 1);
1088 if (cxstack_ix != -1)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1090 (long)cxstack_ix + 1);
1093 /* Now absolutely destruct everything, somehow or other, loops or no. */
1094 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1095 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1097 /* the 2 is for PL_fdpid and PL_strtab */
1098 while (PL_sv_count > 2 && sv_clean_all())
1101 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1102 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1103 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1104 SvFLAGS(PL_strtab) |= SVt_PVHV;
1106 AvREAL_off(PL_fdpid); /* no surviving entries */
1107 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1110 #ifdef HAVE_INTERP_INTERN
1114 /* Destruct the global string table. */
1116 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1117 * so that sv_free() won't fail on them.
1118 * Now that the global string table is using a single hunk of memory
1119 * for both HE and HEK, we either need to explicitly unshare it the
1120 * correct way, or actually free things here.
1123 const I32 max = HvMAX(PL_strtab);
1124 HE * const * const array = HvARRAY(PL_strtab);
1125 HE *hent = array[0];
1128 if (hent && ckWARN_d(WARN_INTERNAL)) {
1129 HE * const next = HeNEXT(hent);
1130 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1131 "Unbalanced string table refcount: (%ld) for \"%s\"",
1132 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1139 hent = array[riter];
1144 HvARRAY(PL_strtab) = 0;
1145 HvTOTALKEYS(PL_strtab) = 0;
1146 HvFILL(PL_strtab) = 0;
1148 SvREFCNT_dec(PL_strtab);
1151 /* free the pointer tables used for cloning */
1152 ptr_table_free(PL_ptr_table);
1153 PL_ptr_table = (PTR_TBL_t*)NULL;
1156 /* free special SVs */
1158 SvREFCNT(&PL_sv_yes) = 0;
1159 sv_clear(&PL_sv_yes);
1160 SvANY(&PL_sv_yes) = NULL;
1161 SvFLAGS(&PL_sv_yes) = 0;
1163 SvREFCNT(&PL_sv_no) = 0;
1164 sv_clear(&PL_sv_no);
1165 SvANY(&PL_sv_no) = NULL;
1166 SvFLAGS(&PL_sv_no) = 0;
1170 for (i=0; i<=2; i++) {
1171 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1172 sv_clear(PERL_DEBUG_PAD(i));
1173 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1174 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1178 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1179 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1181 #ifdef DEBUG_LEAKING_SCALARS
1182 if (PL_sv_count != 0) {
1187 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1188 svend = &sva[SvREFCNT(sva)];
1189 for (sv = sva + 1; sv < svend; ++sv) {
1190 if (SvTYPE(sv) != SVTYPEMASK) {
1191 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1193 " refcnt=%"UVuf pTHX__FORMAT "\n"
1194 "\tallocated at %s:%d %s %s%s\n",
1195 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1196 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1198 sv->sv_debug_inpad ? "for" : "by",
1199 sv->sv_debug_optype ?
1200 PL_op_name[sv->sv_debug_optype]: "(none)",
1201 sv->sv_debug_cloned ? " (cloned)" : ""
1203 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1204 Perl_dump_sv_child(aTHX_ sv);
1210 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1214 /* Wait for up to 4 seconds for child to terminate.
1215 This seems to be the least effort way of timing out on reaping
1217 struct timeval waitfor = {4, 0};
1218 int sock = PL_dumper_fd;
1222 FD_SET(sock, &rset);
1223 select(sock + 1, &rset, NULL, NULL, &waitfor);
1224 waitpid(child, &status, WNOHANG);
1231 #ifdef PERL_DEBUG_READONLY_OPS
1237 #if defined(PERLIO_LAYERS)
1238 /* No more IO - including error messages ! */
1239 PerlIO_cleanup(aTHX);
1242 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1243 as currently layers use it rather than NULL as a marker
1244 for no arg - and will try and SvREFCNT_dec it.
1246 SvREFCNT(&PL_sv_undef) = 0;
1247 SvREADONLY_off(&PL_sv_undef);
1249 Safefree(PL_origfilename);
1250 PL_origfilename = NULL;
1251 Safefree(PL_reg_start_tmp);
1252 PL_reg_start_tmp = (char**)NULL;
1253 PL_reg_start_tmpl = 0;
1254 Safefree(PL_reg_curpm);
1255 Safefree(PL_reg_poscache);
1256 free_tied_hv_pool();
1257 Safefree(PL_op_mask);
1258 Safefree(PL_psig_ptr);
1259 PL_psig_ptr = (SV**)NULL;
1260 Safefree(PL_psig_name);
1261 PL_psig_name = (SV**)NULL;
1262 Safefree(PL_bitcount);
1264 Safefree(PL_psig_pend);
1265 PL_psig_pend = (int*)NULL;
1268 PL_tainting = FALSE;
1269 PL_taint_warn = FALSE;
1270 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1273 DEBUG_P(debprofdump());
1275 #ifdef USE_REENTRANT_API
1276 Perl_reentrant_free(aTHX);
1281 while (PL_regmatch_slab) {
1282 regmatch_slab *s = PL_regmatch_slab;
1283 PL_regmatch_slab = PL_regmatch_slab->next;
1287 /* As the absolutely last thing, free the non-arena SV for mess() */
1290 /* we know that type == SVt_PVMG */
1292 /* it could have accumulated taint magic */
1295 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1296 moremagic = mg->mg_moremagic;
1297 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1299 Safefree(mg->mg_ptr);
1303 /* we know that type >= SVt_PV */
1304 SvPV_free(PL_mess_sv);
1305 Safefree(SvANY(PL_mess_sv));
1306 Safefree(PL_mess_sv);
1313 =for apidoc perl_free
1315 Releases a Perl interpreter. See L<perlembed>.
1325 if (PL_veto_cleanup)
1328 #ifdef PERL_TRACK_MEMPOOL
1331 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1332 * value as we're probably hunting memory leaks then
1334 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1335 if (!s || atoi(s) == 0) {
1336 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1337 thread at thread exit. */
1338 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1339 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1344 #if defined(WIN32) || defined(NETWARE)
1345 # if defined(PERL_IMPLICIT_SYS)
1348 void *host = nw_internal_host;
1350 void *host = w32_internal_host;
1352 PerlMem_free(aTHXx);
1354 nw_delete_internal_host(host);
1356 win32_delete_internal_host(host);
1360 PerlMem_free(aTHXx);
1363 PerlMem_free(aTHXx);
1367 #if defined(USE_ITHREADS)
1368 /* provide destructors to clean up the thread key when libperl is unloaded */
1369 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1371 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1372 #pragma fini "perl_fini"
1373 #elif defined(__sun) && !defined(__GNUC__)
1374 #pragma fini (perl_fini)
1378 #if defined(__GNUC__)
1379 __attribute__((destructor))
1384 if (PL_curinterp && !PL_veto_cleanup)
1389 #endif /* THREADS */
1392 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1395 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1396 PL_exitlist[PL_exitlistlen].fn = fn;
1397 PL_exitlist[PL_exitlistlen].ptr = ptr;
1401 #ifdef HAS_PROCSELFEXE
1402 /* This is a function so that we don't hold on to MAXPATHLEN
1403 bytes of stack longer than necessary
1406 S_procself_val(pTHX_ SV *sv, const char *arg0)
1408 char buf[MAXPATHLEN];
1409 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1411 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1412 includes a spurious NUL which will cause $^X to fail in system
1413 or backticks (this will prevent extensions from being built and
1414 many tests from working). readlink is not meant to add a NUL.
1415 Normal readlink works fine.
1417 if (len > 0 && buf[len-1] == '\0') {
1421 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1422 returning the text "unknown" from the readlink rather than the path
1423 to the executable (or returning an error from the readlink). Any valid
1424 path has a '/' in it somewhere, so use that to validate the result.
1425 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1427 if (len > 0 && memchr(buf, '/', len)) {
1428 sv_setpvn(sv,buf,len);
1434 #endif /* HAS_PROCSELFEXE */
1437 S_set_caret_X(pTHX) {
1439 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1441 #ifdef HAS_PROCSELFEXE
1442 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1445 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1447 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1454 =for apidoc perl_parse
1456 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1462 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1469 PERL_UNUSED_ARG(my_perl);
1471 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1474 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1475 setuid perl scripts securely.\n");
1476 #endif /* IAMSUID */
1479 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1480 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1481 * This MUST be done before any hash stores or fetches take place.
1482 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1483 * yourself, it is your responsibility to provide a good random seed!
1484 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1485 if (!PL_rehash_seed_set)
1486 PL_rehash_seed = get_hash_seed();
1488 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1490 if (s && (atoi(s) == 1))
1491 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1493 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1498 if (PL_origalen != 0) {
1499 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1502 /* Set PL_origalen be the sum of the contiguous argv[]
1503 * elements plus the size of the env in case that it is
1504 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1505 * as the maximum modifiable length of $0. In the worst case
1506 * the area we are able to modify is limited to the size of
1507 * the original argv[0]. (See below for 'contiguous', though.)
1509 const char *s = NULL;
1512 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1513 /* Do the mask check only if the args seem like aligned. */
1515 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1517 /* See if all the arguments are contiguous in memory. Note
1518 * that 'contiguous' is a loose term because some platforms
1519 * align the argv[] and the envp[]. If the arguments look
1520 * like non-aligned, assume that they are 'strictly' or
1521 * 'traditionally' contiguous. If the arguments look like
1522 * aligned, we just check that they are within aligned
1523 * PTRSIZE bytes. As long as no system has something bizarre
1524 * like the argv[] interleaved with some other data, we are
1525 * fine. (Did I just evoke Murphy's Law?) --jhi */
1526 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1528 for (i = 1; i < PL_origargc; i++) {
1529 if ((PL_origargv[i] == s + 1
1531 || PL_origargv[i] == s + 2
1536 (PL_origargv[i] > s &&
1538 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1549 #ifndef PERL_USE_SAFE_PUTENV
1550 /* Can we grab env area too to be used as the area for $0? */
1551 if (s && PL_origenviron && !PL_use_safe_putenv) {
1552 if ((PL_origenviron[0] == s + 1)
1555 (PL_origenviron[0] > s &&
1556 PL_origenviron[0] <=
1557 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1560 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1561 s = PL_origenviron[0];
1564 my_setenv("NoNe SuCh", NULL);
1565 /* Force copy of environment. */
1566 for (i = 1; PL_origenviron[i]; i++) {
1567 if (PL_origenviron[i] == s + 1
1570 (PL_origenviron[i] > s &&
1571 PL_origenviron[i] <=
1572 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1575 s = PL_origenviron[i];
1583 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1585 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1590 /* Come here if running an undumped a.out. */
1592 PL_origfilename = savepv(argv[0]);
1593 PL_do_undump = FALSE;
1594 cxstack_ix = -1; /* start label stack again */
1596 assert (!PL_tainted);
1598 S_set_caret_X(aTHX);
1600 init_postdump_symbols(argc,argv,env);
1605 op_free(PL_main_root);
1606 PL_main_root = NULL;
1608 PL_main_start = NULL;
1609 SvREFCNT_dec(PL_main_cv);
1613 oldscope = PL_scopestack_ix;
1614 PL_dowarn = G_WARN_OFF;
1619 parse_body(env,xsinit);
1621 call_list(oldscope, PL_unitcheckav);
1623 call_list(oldscope, PL_checkav);
1630 /* my_exit() was called */
1631 while (PL_scopestack_ix > oldscope)
1634 PL_curstash = PL_defstash;
1636 call_list(oldscope, PL_unitcheckav);
1638 call_list(oldscope, PL_checkav);
1642 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1651 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1655 int argc = PL_origargc;
1656 char **argv = PL_origargv;
1657 const char *scriptname = NULL;
1658 VOL bool dosearch = FALSE;
1659 const char *validarg = "";
1661 register char *s, c;
1662 const char *cddir = NULL;
1663 #ifdef USE_SITECUSTOMIZE
1664 bool minus_f = FALSE;
1666 SV *linestr_sv = newSV_type(SVt_PVIV);
1667 bool add_read_e_script = FALSE;
1669 SvGROW(linestr_sv, 80);
1670 sv_setpvn(linestr_sv,"",0);
1672 sv = newSVpvs(""); /* first used for -I flags */
1676 for (argc--,argv++; argc > 0; argc--,argv++) {
1677 if (argv[0][0] != '-' || !argv[0][1])
1681 validarg = " PHOOEY ";
1685 * Can we rely on the kernel to start scripts with argv[1] set to
1686 * contain all #! line switches (the whole line)? (argv[0] is set to
1687 * the interpreter name, argv[2] to the script name; argv[3] and
1688 * above may contain other arguments.)
1695 #ifndef PERL_STRICT_CR
1720 if ((s = moreswitches(s)))
1725 CHECK_MALLOC_TOO_LATE_FOR('t');
1726 if( !PL_tainting ) {
1727 PL_taint_warn = TRUE;
1733 CHECK_MALLOC_TOO_LATE_FOR('T');
1735 PL_taint_warn = FALSE;
1743 #ifdef MACOS_TRADITIONAL
1744 /* ignore -e for Dev:Pseudo argument */
1745 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1748 forbid_setid('e', -1);
1750 PL_e_script = newSVpvs("");
1751 add_read_e_script = TRUE;
1754 sv_catpv(PL_e_script, s);
1756 sv_catpv(PL_e_script, argv[1]);
1760 Perl_croak(aTHX_ "No code specified for -%c", c);
1761 sv_catpvs(PL_e_script, "\n");
1765 #ifdef USE_SITECUSTOMIZE
1771 case 'I': /* -I handled both here and in moreswitches() */
1772 forbid_setid('I', -1);
1773 if (!*++s && (s=argv[1]) != NULL) {
1777 STRLEN len = strlen(s);
1778 const char * const p = savepvn(s, len);
1779 incpush(p, TRUE, TRUE, FALSE, FALSE);
1780 sv_catpvs(sv, "-I");
1781 sv_catpvn(sv, p, len);
1786 Perl_croak(aTHX_ "No directory specified for -I");
1789 forbid_setid('P', -1);
1790 PL_preprocess = TRUE;
1794 forbid_setid('S', -1);
1802 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1806 opts_prog = newSVpvs("print Config::myconfig(),");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1812 opts = SvCUR(opts_prog);
1814 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1818 # ifdef DEBUG_LEAKING_SCALARS
1819 " DEBUG_LEAKING_SCALARS"
1821 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1822 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1824 # ifdef FAKE_THREADS
1827 # ifdef MULTIPLICITY
1836 # ifdef PERL_DEBUG_READONLY_OPS
1837 " PERL_DEBUG_READONLY_OPS"
1839 # ifdef PERL_DONT_CREATE_GVSV
1840 " PERL_DONT_CREATE_GVSV"
1842 # ifdef PERL_GLOBAL_STRUCT
1843 " PERL_GLOBAL_STRUCT"
1845 # ifdef PERL_IMPLICIT_CONTEXT
1846 " PERL_IMPLICIT_CONTEXT"
1848 # ifdef PERL_IMPLICIT_SYS
1849 " PERL_IMPLICIT_SYS"
1854 # ifdef PERL_MALLOC_WRAP
1857 # ifdef PERL_MEM_LOG
1860 # ifdef PERL_MEM_LOG_ENV
1863 # ifdef PERL_MEM_LOG_ENV_FD
1864 " PERL_MEM_LOG_ENV_FD"
1866 # ifdef PERL_MEM_LOG_STDERR
1867 " PERL_MEM_LOG_STDERR"
1869 # ifdef PERL_MEM_LOG_TIMESTAMP
1870 " PERL_MEM_LOG_TIMESTAMP"
1872 # ifdef PERL_NEED_APPCTX
1875 # ifdef PERL_NEED_TIMESBASE
1876 " PERL_NEED_TIMESBASE"
1878 # ifdef PERL_OLD_COPY_ON_WRITE
1879 " PERL_OLD_COPY_ON_WRITE"
1884 # ifdef PERL_TRACK_MEMPOOL
1885 " PERL_TRACK_MEMPOOL"
1887 # ifdef PERL_USE_SAFE_PUTENV
1888 " PERL_USE_SAFE_PUTENV"
1890 # ifdef PERL_USES_PL_PIDSTATUS
1891 " PERL_USES_PL_PIDSTATUS"
1893 # ifdef PL_OP_SLAB_ALLOC
1896 # ifdef THREADS_HAVE_PIDS
1897 " THREADS_HAVE_PIDS"
1899 # ifdef USE_64_BIT_ALL
1902 # ifdef USE_64_BIT_INT
1905 # ifdef USE_ITHREADS
1908 # ifdef USE_LARGE_FILES
1911 # ifdef USE_LONG_DOUBLE
1917 # ifdef USE_REENTRANT_API
1918 " USE_REENTRANT_API"
1923 # ifdef USE_SITECUSTOMIZE
1924 " USE_SITECUSTOMIZE"
1931 while (SvCUR(opts_prog) > opts+76) {
1932 /* find last space after "options: " and before col 76
1936 char * const pv = SvPV_nolen(opts_prog);
1937 const char c = pv[opts+76];
1939 space = strrchr(pv+opts+26, ' ');
1941 if (!space) break; /* "Can't happen" */
1943 /* break the line before that space */
1946 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1947 STR_WITH_LEN("\\n "));
1950 sv_catpvs(opts_prog,"\\n\",");
1952 #if defined(LOCAL_PATCH_COUNT)
1953 if (LOCAL_PATCH_COUNT > 0) {
1955 sv_catpvs(opts_prog,
1956 "\" Locally applied patches:\\n\",");
1957 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1958 if (PL_localpatches[i])
1959 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1960 0, PL_localpatches[i], 0);
1964 Perl_sv_catpvf(aTHX_ opts_prog,
1965 "\" Built under %s\\n\"",OSNAME);
1968 Perl_sv_catpvf(aTHX_ opts_prog,
1969 ",\" Compiled at %s %s\\n\"",__DATE__,
1972 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1976 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1977 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1978 "sort grep {/^PERL/} keys %ENV; ");
1980 sv_catpvs(opts_prog,
1981 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1983 sv_catpvs(opts_prog,
1984 "print \" \\%ENV:\\n @env\\n\" if @env;"
1985 "print \" \\@INC:\\n @INC\\n\";");
1989 opts_prog = Perl_newSVpvf(aTHX_
1990 "Config::config_vars(qw%c%s%c)",
1994 av_push(PL_preambleav, opts_prog);
1995 /* don't look for script or read stdin */
1996 scriptname = BIT_BUCKET;
2000 PL_doextract = TRUE;
2008 if (!*++s || isSPACE(*s)) {
2012 /* catch use of gnu style long options */
2013 if (strEQ(s, "version")) {
2017 if (strEQ(s, "help")) {
2024 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2030 #ifndef SECURE_INTERNAL_GETENV
2033 (s = PerlEnv_getenv("PERL5OPT")))
2035 const char *popt = s;
2038 if (*s == '-' && *(s+1) == 'T') {
2039 CHECK_MALLOC_TOO_LATE_FOR('T');
2041 PL_taint_warn = FALSE;
2044 char *popt_copy = NULL;
2057 if (!strchr("CDIMUdmtwA", *s))
2058 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2062 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2063 s = popt_copy + (s - popt);
2064 d = popt_copy + (d - popt);
2071 if( !PL_tainting ) {
2072 PL_taint_warn = TRUE;
2082 #ifdef USE_SITECUSTOMIZE
2084 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2085 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2090 scriptname = argv[0];
2093 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2095 else if (scriptname == NULL) {
2097 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2103 /* Set $^X early so that it can be used for relocatable paths in @INC */
2104 assert (!PL_tainted);
2106 S_set_caret_X(aTHX);
2113 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2115 validate_suid(validarg, scriptname, fdscript, suidscript,
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, rsfp);
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);
2157 PL_isarev = newHV();
2160 boot_core_UNIVERSAL();
2161 boot_core_xsutils();
2165 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2167 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2173 # ifdef HAS_SOCKS5_INIT
2174 socks5_init(argv[0]);
2180 init_predump_symbols();
2181 /* init_postdump_symbols not currently designed to be called */
2182 /* more than once (ENV isn't cleared first, for example) */
2183 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2185 init_postdump_symbols(argc,argv,env);
2187 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2188 * or explicitly in some platforms.
2189 * locale.c:Perl_init_i18nl10n() if the environment
2190 * look like the user wants to use UTF-8. */
2191 #if defined(__SYMBIAN32__)
2192 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2195 /* Requires init_predump_symbols(). */
2196 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2201 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2202 * and the default open disciplines. */
2203 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2204 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2206 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2207 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2208 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2210 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2211 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2212 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2214 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2215 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2216 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2218 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2219 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2222 sv_setpvn(sv, ":utf8\0:utf8", 11);
2224 sv_setpvn(sv, ":utf8\0", 6);
2227 sv_setpvn(sv, "\0:utf8", 6);
2233 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2234 if (strEQ(s, "unsafe"))
2235 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2236 else if (strEQ(s, "safe"))
2237 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2239 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2243 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2247 PL_xmlfp = PerlIO_stdout();
2249 PL_xmlfp = PerlIO_open(s, "w");
2251 Perl_croak(aTHX_ "Can't open %s", s);
2253 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2255 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2256 PL_madskills = atoi(s);
2257 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2261 lex_start(linestr_sv, rsfp, TRUE);
2262 PL_subname = newSVpvs("main");
2264 if (add_read_e_script)
2265 filter_add(read_e_script, NULL);
2267 /* now parse the script */
2269 SETERRNO(0,SS_NORMAL);
2270 #ifdef MACOS_TRADITIONAL
2271 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2273 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2275 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2276 MacPerl_MPWFileName(PL_origfilename));
2280 if (yyparse() || PL_parser->error_count) {
2282 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2284 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2289 CopLINE_set(PL_curcop, 0);
2290 PL_curstash = PL_defstash;
2291 PL_preprocess = FALSE;
2293 SvREFCNT_dec(PL_e_script);
2301 SAVECOPFILE(PL_curcop);
2302 SAVECOPLINE(PL_curcop);
2303 gv_check(PL_defstash);
2310 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2311 dump_mstats("after compilation:");
2320 =for apidoc perl_run
2322 Tells a Perl interpreter to run. See L<perlembed>.
2335 PERL_UNUSED_ARG(my_perl);
2337 oldscope = PL_scopestack_ix;
2345 cxstack_ix = -1; /* start context stack again */
2347 case 0: /* normal completion */
2351 case 2: /* my_exit() */
2352 while (PL_scopestack_ix > oldscope)
2355 PL_curstash = PL_defstash;
2356 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2357 PL_endav && !PL_minus_c)
2358 call_list(oldscope, PL_endav);
2360 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2361 dump_mstats("after execution: ");
2367 POPSTACK_TO(PL_mainstack);
2370 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2381 S_run_body(pTHX_ I32 oldscope)
2384 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2385 PL_sawampersand ? "Enabling" : "Omitting"));
2387 if (!PL_restartop) {
2391 exit(0); /* less likely to core dump than my_exit(0) */
2394 DEBUG_x(dump_all());
2397 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2399 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2403 #ifdef MACOS_TRADITIONAL
2404 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2405 (gMacPerl_ErrorFormat ? "# " : ""),
2406 MacPerl_MPWFileName(PL_origfilename));
2408 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2412 if (PERLDB_SINGLE && PL_DBsingle)
2413 sv_setiv(PL_DBsingle, 1);
2415 call_list(oldscope, PL_initav);
2416 #ifdef PERL_DEBUG_READONLY_OPS
2417 Perl_pending_Slabs_to_ro(aTHX);
2424 PL_op = PL_restartop;
2428 else if (PL_main_start) {
2429 CvDEPTH(PL_main_cv) = 1;
2430 PL_op = PL_main_start;
2438 =head1 SV Manipulation Functions
2440 =for apidoc p||get_sv
2442 Returns the SV of the specified Perl scalar. If C<create> is set and the
2443 Perl variable does not exist then it will be created. If C<create> is not
2444 set and the variable does not exist then NULL is returned.
2450 Perl_get_sv(pTHX_ const char *name, I32 create)
2453 gv = gv_fetchpv(name, create, SVt_PV);
2460 =head1 Array Manipulation Functions
2462 =for apidoc p||get_av
2464 Returns the AV of the specified Perl array. If C<create> is set and the
2465 Perl variable does not exist then it will be created. If C<create> is not
2466 set and the variable does not exist then NULL is returned.
2472 Perl_get_av(pTHX_ const char *name, I32 create)
2474 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2483 =head1 Hash Manipulation Functions
2485 =for apidoc p||get_hv
2487 Returns the HV of the specified Perl hash. If C<create> is set and the
2488 Perl variable does not exist then it will be created. If C<create> is not
2489 set and the variable does not exist then NULL is returned.
2495 Perl_get_hv(pTHX_ const char *name, I32 create)
2497 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2506 =head1 CV Manipulation Functions
2508 =for apidoc p||get_cvn_flags
2510 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2511 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2512 exist then it will be declared (which has the same effect as saying
2513 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2514 then NULL is returned.
2516 =for apidoc p||get_cv
2518 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2524 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2526 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2527 /* XXX this is probably not what they think they're getting.
2528 * It has the same effect as "sub name;", i.e. just a forward
2530 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2531 SV *const sv = newSVpvn(name,len);
2532 SvFLAGS(sv) |= flags & SVf_UTF8;
2533 return newSUB(start_subparse(FALSE, 0),
2534 newSVOP(OP_CONST, 0, sv),
2543 Perl_get_cv(pTHX_ const char *name, I32 flags)
2545 return get_cvn_flags(name, strlen(name), flags);
2548 /* Be sure to refetch the stack pointer after calling these routines. */
2552 =head1 Callback Functions
2554 =for apidoc p||call_argv
2556 Performs a callback to the specified Perl sub. See L<perlcall>.
2562 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2564 /* See G_* flags in cop.h */
2565 /* null terminated arg list */
2573 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2578 return call_pv(sub_name, flags);
2582 =for apidoc p||call_pv
2584 Performs a callback to the specified Perl sub. See L<perlcall>.
2590 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2591 /* name of the subroutine */
2592 /* See G_* flags in cop.h */
2594 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2598 =for apidoc p||call_method
2600 Performs a callback to the specified Perl method. The blessed object must
2601 be on the stack. See L<perlcall>.
2607 Perl_call_method(pTHX_ const char *methname, I32 flags)
2608 /* name of the subroutine */
2609 /* See G_* flags in cop.h */
2611 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2614 /* May be called with any of a CV, a GV, or an SV containing the name. */
2616 =for apidoc p||call_sv
2618 Performs a callback to the Perl sub whose name is in the SV. See
2625 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2626 /* See G_* flags in cop.h */
2629 LOGOP myop; /* fake syntax tree node */
2634 bool oldcatch = CATCH_GET;
2636 OP* const oldop = PL_op;
2639 if (flags & G_DISCARD) {
2644 Zero(&myop, 1, LOGOP);
2645 myop.op_next = NULL;
2646 if (!(flags & G_NOARGS))
2647 myop.op_flags |= OPf_STACKED;
2648 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2649 (flags & G_ARRAY) ? OPf_WANT_LIST :
2654 EXTEND(PL_stack_sp, 1);
2655 *++PL_stack_sp = sv;
2657 oldscope = PL_scopestack_ix;
2659 if (PERLDB_SUB && PL_curstash != PL_debstash
2660 /* Handle first BEGIN of -d. */
2661 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2662 /* Try harder, since this may have been a sighandler, thus
2663 * curstash may be meaningless. */
2664 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2665 && !(flags & G_NODEBUG))
2666 PL_op->op_private |= OPpENTERSUB_DB;
2668 if (flags & G_METHOD) {
2669 Zero(&method_op, 1, UNOP);
2670 method_op.op_next = PL_op;
2671 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2672 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2673 PL_op = (OP*)&method_op;
2676 if (!(flags & G_EVAL)) {
2678 CALL_BODY_SUB((OP*)&myop);
2679 retval = PL_stack_sp - (PL_stack_base + oldmark);
2680 CATCH_SET(oldcatch);
2683 myop.op_other = (OP*)&myop;
2685 create_eval_scope(flags|G_FAKINGEVAL);
2693 CALL_BODY_SUB((OP*)&myop);
2694 retval = PL_stack_sp - (PL_stack_base + oldmark);
2695 if (!(flags & G_KEEPERR))
2696 sv_setpvn(ERRSV,"",0);
2702 /* my_exit() was called */
2703 PL_curstash = PL_defstash;
2706 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2707 Perl_croak(aTHX_ "Callback called exit");
2712 PL_op = PL_restartop;
2716 PL_stack_sp = PL_stack_base + oldmark;
2717 if (flags & G_ARRAY)
2721 *++PL_stack_sp = &PL_sv_undef;
2726 if (PL_scopestack_ix > oldscope)
2727 delete_eval_scope();
2731 if (flags & G_DISCARD) {
2732 PL_stack_sp = PL_stack_base + oldmark;
2741 /* Eval a string. The G_EVAL flag is always assumed. */
2744 =for apidoc p||eval_sv
2746 Tells Perl to C<eval> the string in the SV.
2752 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2754 /* See G_* flags in cop.h */
2758 UNOP myop; /* fake syntax tree node */
2759 VOL I32 oldmark = SP - PL_stack_base;
2762 OP* const oldop = PL_op;
2765 if (flags & G_DISCARD) {
2772 Zero(PL_op, 1, UNOP);
2773 EXTEND(PL_stack_sp, 1);
2774 *++PL_stack_sp = sv;
2776 if (!(flags & G_NOARGS))
2777 myop.op_flags = OPf_STACKED;
2778 myop.op_next = NULL;
2779 myop.op_type = OP_ENTEREVAL;
2780 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2781 (flags & G_ARRAY) ? OPf_WANT_LIST :
2783 if (flags & G_KEEPERR)
2784 myop.op_flags |= OPf_SPECIAL;
2786 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2787 * before a PUSHEVAL, which corrupts the stack after a croak */
2788 TAINT_PROPER("eval_sv()");
2794 CALL_BODY_EVAL((OP*)&myop);
2795 retval = PL_stack_sp - (PL_stack_base + oldmark);
2796 if (!(flags & G_KEEPERR))
2797 sv_setpvn(ERRSV,"",0);
2803 /* my_exit() was called */
2804 PL_curstash = PL_defstash;
2807 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2808 Perl_croak(aTHX_ "Callback called exit");
2813 PL_op = PL_restartop;
2817 PL_stack_sp = PL_stack_base + oldmark;
2818 if (flags & G_ARRAY)
2822 *++PL_stack_sp = &PL_sv_undef;
2828 if (flags & G_DISCARD) {
2829 PL_stack_sp = PL_stack_base + oldmark;
2839 =for apidoc p||eval_pv
2841 Tells Perl to C<eval> the given string and return an SV* result.
2847 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2851 SV* sv = newSVpv(p, 0);
2853 eval_sv(sv, G_SCALAR);
2860 if (croak_on_error && SvTRUE(ERRSV)) {
2861 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2867 /* Require a module. */
2870 =head1 Embedding Functions
2872 =for apidoc p||require_pv
2874 Tells Perl to C<require> the file named by the string argument. It is
2875 analogous to the Perl code C<eval "require '$file'">. It's even
2876 implemented that way; consider using load_module instead.
2881 Perl_require_pv(pTHX_ const char *pv)
2886 PUSHSTACKi(PERLSI_REQUIRE);
2888 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2889 eval_sv(sv_2mortal(sv), G_DISCARD);
2895 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2897 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2900 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2904 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2906 /* This message really ought to be max 23 lines.
2907 * Removed -h because the user already knows that option. Others? */
2909 static const char * const usage_msg[] = {
2910 "-0[octal] specify record separator (\\0, if no argument)",
2911 "-A[mod][=pattern] activate all/given assertions",
2912 "-a autosplit mode with -n or -p (splits $_ into @F)",
2913 "-C[number/list] enables the listed Unicode features",
2914 "-c check syntax only (runs BEGIN and CHECK blocks)",
2915 "-d[:debugger] run program under debugger",
2916 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2917 "-e program one line of program (several -e's allowed, omit programfile)",
2918 "-E program like -e, but enables all optional features",
2919 "-f don't do $sitelib/sitecustomize.pl at startup",
2920 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2921 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2922 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2923 "-l[octal] enable line ending processing, specifies line terminator",
2924 "-[mM][-]module execute \"use/no module...\" before executing program",
2925 "-n assume \"while (<>) { ... }\" loop around program",
2926 "-p assume loop like -n but print line also, like sed",
2927 "-P run program through C preprocessor before compilation",
2928 "-s enable rudimentary parsing for switches after programfile",
2929 "-S look for programfile using PATH environment variable",
2930 "-t enable tainting warnings",
2931 "-T enable tainting checks",
2932 "-u dump core after parsing program",
2933 "-U allow unsafe operations",
2934 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2935 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2936 "-w enable many useful warnings (RECOMMENDED)",
2937 "-W enable all warnings",
2938 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2939 "-X disable all warnings",
2943 const char * const *p = usage_msg;
2945 PerlIO_printf(PerlIO_stdout(),
2946 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2949 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2952 /* convert a string of -D options (or digits) into an int.
2953 * sets *s to point to the char after the options */
2957 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2959 static const char * const usage_msgd[] = {
2960 " Debugging flag values: (see also -d)",
2961 " p Tokenizing and parsing (with v, displays parse stack)",
2962 " s Stack snapshots (with v, displays all stacks)",
2963 " l Context (loop) stack processing",
2964 " t Trace execution",
2965 " o Method and overloading resolution",
2966 " c String/numeric conversions",
2967 " P Print profiling info, preprocessor command for -P, source file input state",
2968 " m Memory allocation",
2969 " f Format processing",
2970 " r Regular expression parsing and execution",
2971 " x Syntax tree dump",
2972 " u Tainting checks",
2973 " H Hash dump -- usurps values()",
2974 " X Scratchpad allocation",
2976 " S Thread synchronization",
2978 " R Include reference counts of dumped variables (eg when using -Ds)",
2979 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2980 " v Verbose: use in conjunction with other flags",
2982 " A Consistency checks on internal structures",
2983 " q quiet - currently only suppresses the 'EXECUTING' message",
2988 /* if adding extra options, remember to update DEBUG_MASK */
2989 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2991 for (; isALNUM(**s); (*s)++) {
2992 const char * const d = strchr(debopts,**s);
2994 i |= 1 << (d - debopts);
2995 else if (ckWARN_d(WARN_DEBUGGING))
2996 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2997 "invalid option -D%c, use -D'' to see choices\n", **s);
3000 else if (isDIGIT(**s)) {
3002 for (; isALNUM(**s); (*s)++) ;
3004 else if (givehelp) {
3005 const char *const *p = usage_msgd;
3006 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3009 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3010 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3011 "-Dp not implemented on this platform\n");
3017 /* This routine handles any switches that can be given during run */
3020 Perl_moreswitches(pTHX_ char *s)
3031 SvREFCNT_dec(PL_rs);
3032 if (s[1] == 'x' && s[2]) {
3033 const char *e = s+=2;
3039 flags = PERL_SCAN_SILENT_ILLDIGIT;
3040 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3041 if (s + numlen < e) {
3042 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3046 PL_rs = newSVpvs("");
3047 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3048 tmps = (U8*)SvPVX(PL_rs);
3049 uvchr_to_utf8(tmps, rschar);
3050 SvCUR_set(PL_rs, UNISKIP(rschar));
3055 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3056 if (rschar & ~((U8)~0))
3057 PL_rs = &PL_sv_undef;
3058 else if (!rschar && numlen >= 2)
3059 PL_rs = newSVpvs("");
3061 char ch = (char)rschar;
3062 PL_rs = newSVpvn(&ch, 1);
3065 sv_setsv(get_sv("/", TRUE), PL_rs);
3070 PL_unicode = parse_unicode_opts( (const char **)&s );
3071 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3077 while (*s && !isSPACE(*s)) ++s;
3078 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3089 forbid_setid('d', -1);
3092 /* -dt indicates to the debugger that threads will be used */
3093 if (*s == 't' && !isALNUM(s[1])) {
3095 my_setenv("PERL5DB_THREADED", "1");
3098 /* The following permits -d:Mod to accepts arguments following an =
3099 in the fashion that -MSome::Mod does. */
3100 if (*s == ':' || *s == '=') {
3102 SV * const sv = newSVpvs("use Devel::");
3104 /* We now allow -d:Module=Foo,Bar */
3105 while(isALNUM(*s) || *s==':') ++s;
3107 sv_catpv(sv, start);
3109 sv_catpvn(sv, start, s-start);
3110 /* Don't use NUL as q// delimiter here, this string goes in the
3112 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3115 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3118 PL_perldb = PERLDB_ALL;
3125 forbid_setid('D', -1);
3127 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3128 #else /* !DEBUGGING */
3129 if (ckWARN_d(WARN_DEBUGGING))
3130 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3131 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3132 for (s++; isALNUM(*s); s++) ;
3137 usage(PL_origargv[0]);
3140 Safefree(PL_inplace);
3141 #if defined(__CYGWIN__) /* do backup extension automagically */
3142 if (*(s+1) == '\0') {
3143 PL_inplace = savepvs(".bak");
3146 #endif /* __CYGWIN__ */
3148 const char * const start = ++s;
3149 while (*s && !isSPACE(*s))
3152 PL_inplace = savepvn(start, s - start);
3156 if (*s == '-') /* Additional switches on #! line. */
3160 case 'I': /* -I handled both here and in parse_body() */
3161 forbid_setid('I', -1);
3163 while (*s && isSPACE(*s))
3168 /* ignore trailing spaces (possibly followed by other switches) */
3170 for (e = p; *e && !isSPACE(*e); e++) ;
3174 } while (*p && *p != '-');
3175 e = savepvn(s, e-s);
3176 incpush(e, TRUE, TRUE, FALSE, FALSE);
3183 Perl_croak(aTHX_ "No directory specified for -I");
3189 SvREFCNT_dec(PL_ors_sv);
3195 PL_ors_sv = newSVpvs("\n");
3196 numlen = 3 + (*s == '0');
3197 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3201 if (RsPARA(PL_rs)) {
3202 PL_ors_sv = newSVpvs("\n\n");
3205 PL_ors_sv = newSVsv(PL_rs);
3210 forbid_setid('A', -1);
3213 char * const start = s;
3214 SV * const sv = newSVpvs("use assertions::activate");
3215 while(isALNUM(*s) || *s == ':') ++s;
3217 sv_catpvs(sv, "::");
3218 sv_catpvn(sv, start, s-start);
3221 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3224 else if (*s != '\0') {
3225 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3227 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3231 forbid_setid('M', -1); /* XXX ? */
3234 forbid_setid('m', -1); /* XXX ? */
3238 const char *use = "use ";
3239 /* -M-foo == 'no foo' */
3240 /* Leading space on " no " is deliberate, to make both
3241 possibilities the same length. */
3242 if (*s == '-') { use = " no "; ++s; }
3243 sv = newSVpvn(use,4);
3245 /* We allow -M'Module qw(Foo Bar)' */
3246 while(isALNUM(*s) || *s==':') ++s;
3248 sv_catpv(sv, start);
3249 if (*(start-1) == 'm') {
3251 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3252 sv_catpvs( sv, " ()");
3256 Perl_croak(aTHX_ "Module name required with -%c option",
3258 sv_catpvn(sv, start, s-start);
3259 sv_catpvs(sv, " split(/,/,q");
3260 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3262 sv_catpvs(sv, "\0)");
3265 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3268 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3279 forbid_setid('s', -1);
3280 PL_doswitches = TRUE;
3294 #ifdef MACOS_TRADITIONAL
3295 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3297 PL_do_undump = TRUE;
3305 if (!sv_derived_from(PL_patchlevel, "version"))
3306 upg_version(PL_patchlevel, TRUE);
3308 PerlIO_printf(PerlIO_stdout(),
3309 Perl_form(aTHX_ "\nThis is perl, %"SVf
3310 #ifdef PERL_PATCHNUM
3311 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3314 SVfARG(vstringify(PL_patchlevel)),
3317 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3318 PerlIO_printf(PerlIO_stdout(),
3319 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3320 SVfARG(vstringify(PL_patchlevel))));
3321 PerlIO_printf(PerlIO_stdout(),
3322 Perl_form(aTHX_ " built under %s at %s %s\n",
3323 OSNAME, __DATE__, __TIME__));
3324 PerlIO_printf(PerlIO_stdout(),
3325 Perl_form(aTHX_ " OS Specific Release: %s\n",
3329 #if defined(LOCAL_PATCH_COUNT)
3330 if (LOCAL_PATCH_COUNT > 0)
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\n(with %d registered patch%s, "
3333 "see perl -V for more detail)",
3335 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "\n\nCopyright 1987-2007, Larry Wall\n");
3340 #ifdef MACOS_TRADITIONAL
3341 PerlIO_printf(PerlIO_stdout(),
3342 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3343 "maintained by Chris Nandor\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3352 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3355 PerlIO_printf(PerlIO_stdout(),
3356 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3357 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "atariST series port, ++jrb bammi@cadence.com\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3388 PerlIO_printf(PerlIO_stdout(),
3389 "MiNT port by Guido Flohr, 1997-1999\n");
3392 PerlIO_printf(PerlIO_stdout(),
3393 "EPOC port by Olaf Flebbe, 1999-2002\n");
3396 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3397 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3400 #ifdef __SYMBIAN32__
3401 PerlIO_printf(PerlIO_stdout(),
3402 "Symbian port by Nokia, 2004-2005\n");
3404 #ifdef BINARY_BUILD_NOTICE
3405 BINARY_BUILD_NOTICE;
3407 PerlIO_printf(PerlIO_stdout(),
3409 Perl may be copied only under the terms of either the Artistic License or the\n\
3410 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3411 Complete documentation for Perl, including FAQ lists, should be found on\n\
3412 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3413 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3416 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3417 PL_dowarn |= G_WARN_ON;
3422 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3423 if (!specialWARN(PL_compiling.cop_warnings))
3424 PerlMemShared_free(PL_compiling.cop_warnings);
3425 PL_compiling.cop_warnings = pWARN_ALL ;
3429 PL_dowarn = G_WARN_ALL_OFF;
3430 if (!specialWARN(PL_compiling.cop_warnings))
3431 PerlMemShared_free(PL_compiling.cop_warnings);
3432 PL_compiling.cop_warnings = pWARN_NONE ;
3437 if (s[1] == '-') /* Additional switches on #! line. */
3442 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3448 #ifdef ALTERNATE_SHEBANG
3449 case 'S': /* OS/2 needs -S on "extproc" line. */
3457 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3462 /* compliments of Tom Christiansen */
3464 /* unexec() can be found in the Gnu emacs distribution */
3465 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3468 Perl_my_unexec(pTHX)
3470 PERL_UNUSED_CONTEXT;
3472 SV * prog = newSVpv(BIN_EXP, 0);
3473 SV * file = newSVpv(PL_origfilename, 0);
3477 sv_catpvs(prog, "/perl");
3478 sv_catpvs(file, ".perldump");
3480 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3481 /* unexec prints msg to stderr in case of failure */
3482 PerlProc_exit(status);
3485 # include <lib$routines.h>
3486 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3487 # elif defined(WIN32) || defined(__CYGWIN__)
3488 Perl_croak(aTHX_ "dump is not supported");
3490 ABORT(); /* for use with undump */
3495 /* initialize curinterp */
3501 # define PERLVAR(var,type)
3502 # define PERLVARA(var,n,type)
3503 # if defined(PERL_IMPLICIT_CONTEXT)
3504 # define PERLVARI(var,type,init) aTHX->var = init;
3505 # define PERLVARIC(var,type,init) aTHX->var = init;
3507 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3508 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3510 # include "intrpvar.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"
3527 /* As these are inside a structure, PERLVARI isn't capable of initialising
3529 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3530 PL_reg_poscache = PL_reg_starttry = NULL;
3534 S_init_main_stash(pTHX)
3539 PL_curstash = PL_defstash = newHV();
3540 /* We know that the string "main" will be in the global shared string
3541 table, so it's a small saving to use it rather than allocate another
3543 PL_curstname = newSVpvs_share("main");
3544 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3545 /* If we hadn't caused another reference to "main" to be in the shared
3546 string table above, then it would be worth reordering these two,
3547 because otherwise all we do is delete "main" from it as a consequence
3548 of the SvREFCNT_dec, only to add it again with hv_name_set */
3549 SvREFCNT_dec(GvHV(gv));
3550 hv_name_set(PL_defstash, "main", 4, 0);
3551 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3553 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3555 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3556 GvMULTI_on(PL_incgv);
3557 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3558 GvMULTI_on(PL_hintgv);
3559 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3560 SvREFCNT_inc_simple_void(PL_defgv);
3561 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3562 SvREFCNT_inc_simple_void(PL_errgv);
3563 GvMULTI_on(PL_errgv);
3564 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3565 GvMULTI_on(PL_replgv);
3566 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3567 #ifdef PERL_DONT_CREATE_GVSV
3570 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3571 sv_setpvn(ERRSV, "", 0);
3572 PL_curstash = PL_defstash;
3573 CopSTASH_set(&PL_compiling, PL_defstash);
3574 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3575 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3577 /* We must init $/ before switches are processed. */
3578 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3582 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3583 int *suidscript, PerlIO **rsfpp)
3588 const char *cpp_discard_flag;
3597 PL_origfilename = savepvs("-e");
3600 /* if find_script() returns, it returns a malloc()-ed value */
3601 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3603 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3604 const char *s = scriptname + 8;
3610 * Tell apart "normal" usage of fdscript, e.g.
3611 * with bash on FreeBSD:
3612 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3613 * from usage in suidperl.
3614 * Does any "normal" usage leave garbage after the number???
3615 * Is it a mistake to use a similar /dev/fd/ construct for
3620 * Be supersafe and do some sanity-checks.
3621 * Still, can we be sure we got the right thing?
3624 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3627 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3629 scriptname = savepv(s + 1);
3630 Safefree(PL_origfilename);
3631 PL_origfilename = (char *)scriptname;
3636 CopFILE_free(PL_curcop);
3637 CopFILE_set(PL_curcop, PL_origfilename);
3638 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3639 scriptname = (char *)"";
3640 if (fdscript >= 0) {
3641 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3642 # if defined(HAS_FCNTL) && defined(F_SETFD)
3644 /* ensure close-on-exec */
3645 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3650 Perl_croak(aTHX_ "sperl needs fd script\n"
3651 "You should not call sperl directly; do you need to "
3652 "change a #! line\nfrom sperl to perl?\n");
3655 * Do not open (or do other fancy stuff) while setuid.
3656 * Perl does the open, and hands script to suidperl on a fd;
3657 * suidperl only does some checks, sets up UIDs and re-execs
3658 * perl with that fd as it has always done.
3661 if (*suidscript != 1) {
3662 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3665 else if (PL_preprocess) {
3666 const char * const cpp_cfg = CPPSTDIN;
3667 SV * const cpp = newSVpvs("");
3668 SV * const cmd = newSV(0);
3670 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3671 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3672 if (strEQ(cpp_cfg, "cppstdin"))
3673 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3674 sv_catpv(cpp, cpp_cfg);
3677 sv_catpvs(sv, "-I");
3678 sv_catpv(sv,PRIVLIB_EXP);
3681 DEBUG_P(PerlIO_printf(Perl_debug_log,
3682 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3683 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3686 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3693 cpp_discard_flag = "";
3695 cpp_discard_flag = "-C";
3699 perl = os2_execname(aTHX);
3701 perl = PL_origargv[0];
3705 /* This strips off Perl comments which might interfere with
3706 the C pre-processor, including #!. #line directives are
3707 deliberately stripped to avoid confusion with Perl's version
3708 of #line. FWP played some golf with it so it will fit
3709 into VMS's 255 character buffer.
3712 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3714 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3716 Perl_sv_setpvf(aTHX_ cmd, "\
3717 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3718 perl, quote, code, quote, scriptname, SVfARG(cpp),
3719 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3721 PL_doextract = FALSE;
3723 DEBUG_P(PerlIO_printf(Perl_debug_log,
3724 "PL_preprocess: cmd=\"%s\"\n",
3727 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3731 else if (!*scriptname) {
3732 forbid_setid(0, *suidscript);
3733 *rsfpp = PerlIO_stdin();
3736 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3737 # if defined(HAS_FCNTL) && defined(F_SETFD)
3739 /* ensure close-on-exec */
3740 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3743 #endif /* IAMSUID */
3745 /* PSz 16 Sep 03 Keep neat error message */
3747 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3749 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3750 CopFILE(PL_curcop), Strerror(errno));
3756 * I_SYSSTATVFS HAS_FSTATVFS
3758 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3759 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3760 * here so that metaconfig picks them up. */
3764 S_fd_on_nosuid_fs(pTHX_ int fd)
3767 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3768 * but is needed also on machines without setreuid.
3769 * Seems safe enough to run as root.
3771 int check_okay = 0; /* able to do all the required sys/libcalls */
3772 int on_nosuid = 0; /* the fd is on a nosuid fs */
3774 * Need to check noexec also: nosuid might not be set, the average
3775 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3777 int on_noexec = 0; /* the fd is on a noexec fs */
3780 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3781 * fstatvfs() is UNIX98.
3782 * fstatfs() is 4.3 BSD.
3783 * ustat()+getmnt() is pre-4.3 BSD.
3784 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3785 * an irrelevant filesystem while trying to reach the right one.
3788 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3790 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3791 defined(HAS_FSTATVFS)
3792 # define FD_ON_NOSUID_CHECK_OKAY
3793 struct statvfs stfs;
3795 check_okay = fstatvfs(fd, &stfs) == 0;
3796 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3798 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3799 on platforms where it is present. */
3800 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3802 # endif /* fstatvfs */
3804 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3805 defined(PERL_MOUNT_NOSUID) && \
3806 defined(PERL_MOUNT_NOEXEC) && \
3807 defined(HAS_FSTATFS) && \
3808 defined(HAS_STRUCT_STATFS) && \
3809 defined(HAS_STRUCT_STATFS_F_FLAGS)
3810 # define FD_ON_NOSUID_CHECK_OKAY
3813 check_okay = fstatfs(fd, &stfs) == 0;
3814 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3815 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3816 # endif /* fstatfs */
3818 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3819 defined(PERL_MOUNT_NOSUID) && \
3820 defined(PERL_MOUNT_NOEXEC) && \
3821 defined(HAS_FSTAT) && \
3822 defined(HAS_USTAT) && \
3823 defined(HAS_GETMNT) && \
3824 defined(HAS_STRUCT_FS_DATA) && \
3826 # define FD_ON_NOSUID_CHECK_OKAY
3829 if (fstat(fd, &fdst) == 0) {
3831 if (ustat(fdst.st_dev, &us) == 0) {
3833 /* NOSTAT_ONE here because we're not examining fields which
3834 * vary between that case and STAT_ONE. */
3835 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3836 size_t cmplen = sizeof(us.f_fname);
3837 if (sizeof(fsd.fd_req.path) < cmplen)
3838 cmplen = sizeof(fsd.fd_req.path);
3839 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3840 fdst.st_dev == fsd.fd_req.dev) {
3842 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3843 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3848 # endif /* fstat+ustat+getmnt */
3850 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3851 defined(HAS_GETMNTENT) && \
3852 defined(HAS_HASMNTOPT) && \
3853 defined(MNTOPT_NOSUID) && \
3854 defined(MNTOPT_NOEXEC)
3855 # define FD_ON_NOSUID_CHECK_OKAY
3856 FILE *mtab = fopen("/etc/mtab", "r");
3857 struct mntent *entry;
3860 if (mtab && (fstat(fd, &stb) == 0)) {
3861 while (entry = getmntent(mtab)) {
3862 if (stat(entry->mnt_dir, &fsb) == 0
3863 && fsb.st_dev == stb.st_dev)
3865 /* found the filesystem */
3867 if (hasmntopt(entry, MNTOPT_NOSUID))
3869 if (hasmntopt(entry, MNTOPT_NOEXEC))
3872 } /* A single fs may well fail its stat(). */
3877 # endif /* getmntent+hasmntopt */
3880 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3882 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3884 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3885 return ((!check_okay) || on_nosuid || on_noexec);
3887 #endif /* IAMSUID */
3890 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3891 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3896 #endif /* IAMSUID */
3898 /* do we need to emulate setuid on scripts? */
3900 /* This code is for those BSD systems that have setuid #! scripts disabled
3901 * in the kernel because of a security problem. Merely defining DOSUID
3902 * in perl will not fix that problem, but if you have disabled setuid
3903 * scripts in the kernel, this will attempt to emulate setuid and setgid
3904 * on scripts that have those now-otherwise-useless bits set. The setuid
3905 * root version must be called suidperl or sperlN.NNN. If regular perl
3906 * discovers that it has opened a setuid script, it calls suidperl with
3907 * the same argv that it had. If suidperl finds that the script it has
3908 * just opened is NOT setuid root, it sets the effective uid back to the
3909 * uid. We don't just make perl setuid root because that loses the
3910 * effective uid we had before invoking perl, if it was different from the
3913 * Description/comments above do not match current workings:
3914 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3915 * suidperl called with script open and name changed to /dev/fd/N/X;
3916 * suidperl croaks if script is not setuid;
3917 * making perl setuid would be a huge security risk (and yes, that
3918 * would lose any euid we might have had).
3920 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3921 * be defined in suidperl only. suidperl must be setuid root. The
3922 * Configure script will set this up for you if you want it.
3928 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3929 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3930 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3932 const char *linestr;
3936 if (fdscript < 0 || suidscript != 1)
3937 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3939 * Since the script is opened by perl, not suidperl, some of these
3940 * checks are superfluous. Leaving them in probably does not lower
3944 * Do checks even for systems with no HAS_SETREUID.
3945 * We used to swap, then re-swap UIDs with
3947 if (setreuid(PL_euid,PL_uid) < 0
3948 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3949 Perl_croak(aTHX_ "Can't swap uid and euid");
3952 if (setreuid(PL_uid,PL_euid) < 0
3953 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3954 Perl_croak(aTHX_ "Can't reswap uid and euid");
3958 /* On this access check to make sure the directories are readable,
3959 * there is actually a small window that the user could use to make
3960 * filename point to an accessible directory. So there is a faint
3961 * chance that someone could execute a setuid script down in a
3962 * non-accessible directory. I don't know what to do about that.
3963 * But I don't think it's too important. The manual lies when
3964 * it says access() is useful in setuid programs.
3966 * So, access() is pretty useless... but not harmful... do anyway.
3968 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3969 Perl_croak(aTHX_ "Can't access() script\n");
3972 /* If we can swap euid and uid, then we can determine access rights
3973 * with a simple stat of the file, and then compare device and
3974 * inode to make sure we did stat() on the same file we opened.
3975 * Then we just have to make sure he or she can execute it.
3978 * As the script is opened by perl, not suidperl, we do not need to
3979 * care much about access rights.
3981 * The 'script changed' check is needed, or we can get lied to
3982 * about $0 with e.g.
3983 * suidperl /dev/fd/4//bin/x 4<setuidscript
3984 * Without HAS_SETREUID, is it safe to stat() as root?
3986 * Are there any operating systems that pass /dev/fd/xxx for setuid
3987 * scripts, as suggested/described in perlsec(1)? Surely they do not
3988 * pass the script name as we do, so the "script changed" test would
3989 * fail for them... but we never get here with
3990 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3992 * This is one place where we must "lie" about return status: not
3993 * say if the stat() failed. We are doing this as root, and could
3994 * be tricked into reporting existence or not of files that the
3995 * "plain" user cannot even see.
3999 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4000 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4001 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4002 Perl_croak(aTHX_ "Setuid script changed\n");
4006 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4007 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4010 * We used to do this check as the "plain" user (after swapping
4011 * UIDs). But the check for nosuid and noexec filesystem is needed,
4012 * and should be done even without HAS_SETREUID. (Maybe those
4013 * operating systems do not have such mount options anyway...)
4014 * Seems safe enough to do as root.
4016 #if !defined(NO_NOSUID_CHECK)
4017 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
4018 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4021 #endif /* IAMSUID */
4023 if (!S_ISREG(PL_statbuf.st_mode)) {
4024 Perl_croak(aTHX_ "Setuid script not plain file\n");
4026 if (PL_statbuf.st_mode & S_IWOTH)
4027 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4028 PL_doswitches = FALSE; /* -s is insecure in suid */
4029 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4030 CopLINE_inc(PL_curcop);
4031 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4032 Perl_croak(aTHX_ "No #! line");
4033 linestr = SvPV_nolen_const(linestr_sv);
4034 /* required even on Sys V */
4035 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4036 Perl_croak(aTHX_ "No #! line");
4040 /* Sanity check on line length */
4041 s_end = s + strlen(s);
4042 if (s_end == s || (s_end - s) > 4000)
4043 Perl_croak(aTHX_ "Very long #! line");
4044 /* Allow more than a single space after #! */
4045 while (isSPACE(*s)) s++;
4046 /* Sanity check on buffer end */
4047 while ((*s) && !isSPACE(*s)) s++;
4048 for (s2 = s; (s2 > linestr &&
4049 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4050 || s2[-1] == '-')); s2--) ;
4051 /* Sanity check on buffer start */
4052 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4053 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4054 Perl_croak(aTHX_ "Not a perl script");
4055 while (*s == ' ' || *s == '\t') s++;
4057 * #! arg must be what we saw above. They can invoke it by
4058 * mentioning suidperl explicitly, but they may not add any strange
4059 * arguments beyond what #! says if they do invoke suidperl that way.
4062 * The way validarg was set up, we rely on the kernel to start
4063 * scripts with argv[1] set to contain all #! line switches (the
4067 * Check that we got all the arguments listed in the #! line (not
4068 * just that there are no extraneous arguments). Might not matter
4069 * much, as switches from #! line seem to be acted upon (also), and
4070 * so may be checked and trapped in perl. But, security checks must
4071 * be done in suidperl and not deferred to perl. Note that suidperl
4072 * does not get around to parsing (and checking) the switches on
4073 * the #! line (but execs perl sooner).
4074 * Allow (require) a trailing newline (which may be of two
4075 * characters on some architectures?) (but no other trailing
4078 len = strlen(validarg);
4079 if (strEQ(validarg," PHOOEY ") ||
4080 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4081 !((s_end - s) == len+1
4082 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4083 Perl_croak(aTHX_ "Args must match #! line");
4087 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4088 PL_euid == PL_statbuf.st_uid)
4090 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4091 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4092 #endif /* IAMSUID */
4095 PL_euid) { /* oops, we're not the setuid root perl */
4097 * When root runs a setuid script, we do not go through the same
4098 * steps of execing sperl and then perl with fd scripts, but
4099 * simply set up UIDs within the same perl invocation; so do
4100 * not have the same checks (on options, whatever) that we have
4101 * for plain users. No problem really: would have to be a script
4102 * that does not actually work for plain users; and if root is
4103 * foolish and can be persuaded to run such an unsafe script, he
4104 * might run also non-setuid ones, and deserves what he gets.
4106 * Or, we might drop the PL_euid check above (and rely just on
4107 * fdscript to avoid loops), and do the execs
4113 * Pass fd script to suidperl.
4114 * Exec suidperl, substituting fd script for scriptname.
4115 * Pass script name as "subdir" of fd, which perl will grok;
4116 * in fact will use that to distinguish this from "normal"
4117 * usage, see comments above.
4119 PerlIO_rewind(rsfp);
4120 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4121 /* PSz 27 Feb 04 Sanity checks on scriptname */
4122 if ((!scriptname) || (!*scriptname) ) {
4123 Perl_croak(aTHX_ "No setuid script name\n");
4125 if (*scriptname == '-') {
4126 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4127 /* Or we might confuse it with an option when replacing
4128 * name in argument list, below (though we do pointer, not
4129 * string, comparisons).
4132 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4133 if (!PL_origargv[which]) {
4134 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4136 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4137 PerlIO_fileno(rsfp), PL_origargv[which]));
4138 #if defined(HAS_FCNTL) && defined(F_SETFD)
4139 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4142 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4143 (int)PERL_REVISION, (int)PERL_VERSION,
4144 (int)PERL_SUBVERSION), PL_origargv);
4146 #endif /* IAMSUID */
4147 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4150 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4152 * This seems back to front: we try HAS_SETEGID first; if not available
4153 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4154 * in the sense that we only want to set EGID; but are there any machines
4155 * with either of the latter, but not the former? Same with UID, later.
4158 (void)setegid(PL_statbuf.st_gid);
4161 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4163 #ifdef HAS_SETRESGID
4164 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4166 PerlProc_setgid(PL_statbuf.st_gid);
4170 if (PerlProc_getegid() != PL_statbuf.st_gid)
4171 Perl_croak(aTHX_ "Can't do setegid!\n");
4173 if (PL_statbuf.st_mode & S_ISUID) {
4174 if (PL_statbuf.st_uid != PL_euid)
4176 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4179 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4181 #ifdef HAS_SETRESUID
4182 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4184 PerlProc_setuid(PL_statbuf.st_uid);
4188 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4189 Perl_croak(aTHX_ "Can't do seteuid!\n");
4191 else if (PL_uid) { /* oops, mustn't run as root */
4193 (void)seteuid((Uid_t)PL_uid);
4196 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4198 #ifdef HAS_SETRESUID
4199 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4201 PerlProc_setuid((Uid_t)PL_uid);
4205 if (PerlProc_geteuid() != PL_uid)
4206 Perl_croak(aTHX_ "Can't do seteuid!\n");
4209 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4210 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4213 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4214 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4215 else if (fdscript < 0 || suidscript != 1)
4216 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4217 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4219 /* PSz 16 Sep 03 Keep neat error message */
4220 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4223 /* We absolutely must clear out any saved ids here, so we */
4224 /* exec the real perl, substituting fd script for scriptname. */
4225 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4227 * It might be thought that using setresgid and/or setresuid (changed to
4228 * set the saved IDs) above might obviate the need to exec, and we could
4229 * go on to "do the perl thing".
4231 * Is there such a thing as "saved GID", and is that set for setuid (but
4232 * not setgid) execution like suidperl? Without exec, it would not be
4233 * cleared for setuid (but not setgid) scripts (or might need a dummy
4236 * We need suidperl to do the exact same argument checking that perl
4237 * does. Thus it cannot be very small; while it could be significantly
4238 * smaller, it is safer (simpler?) to make it essentially the same
4239 * binary as perl (but they are not identical). - Maybe could defer that
4240 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4241 * but prefer to do thorough checks in suidperl itself. Such deferral
4242 * would make suidperl security rely on perl, a design no-no.
4244 * Setuid things should be short and simple, thus easy to understand and
4245 * verify. They should do their "own thing", without influence by
4246 * attackers. It may help if their internal execution flow is fixed,
4247 * regardless of platform: it may be best to exec anyway.
4249 * Suidperl should at least be conceptually simple: a wrapper only,
4250 * never to do any real perl. Maybe we should put
4252 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4254 * into the perly bits.
4256 PerlIO_rewind(rsfp);
4257 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4259 * Keep original arguments: suidperl already has fd script.
4261 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4262 /* if (!PL_origargv[which]) { */
4263 /* errno = EPERM; */
4264 /* Perl_croak(aTHX_ "Permission denied\n"); */
4266 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4267 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4268 #if defined(HAS_FCNTL) && defined(F_SETFD)
4269 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4272 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4273 (int)PERL_REVISION, (int)PERL_VERSION,
4274 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4276 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4277 #endif /* IAMSUID */
4279 PERL_UNUSED_ARG(fdscript);
4280 PERL_UNUSED_ARG(suidscript);
4281 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4282 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4283 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4284 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4286 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4289 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4290 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4291 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4292 /* not set-id, must be wrapped */
4295 PERL_UNUSED_ARG(validarg);
4296 PERL_UNUSED_ARG(scriptname);
4297 PERL_UNUSED_ARG(linestr_sv);
4301 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
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, 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(rsfp);
4332 while (PL_doextract) {
4333 if ((s = sv_gets(linestr_sv, 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(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(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: