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;
877 /* Filters for program text */
878 SvREFCNT_dec(PL_rsfp_filters);
879 PL_rsfp_filters = NULL;
882 Safefree(PL_splitstr);
887 PL_preprocess = FALSE;
893 PL_doswitches = FALSE;
894 PL_dowarn = G_WARN_OFF;
895 PL_doextract = FALSE;
896 PL_sawampersand = FALSE; /* must save all match strings */
899 Safefree(PL_inplace);
901 SvREFCNT_dec(PL_patchlevel);
904 SvREFCNT_dec(PL_e_script);
910 /* magical thingies */
912 SvREFCNT_dec(PL_ofs_sv); /* $, */
915 SvREFCNT_dec(PL_ors_sv); /* $\ */
918 SvREFCNT_dec(PL_rs); /* $/ */
921 Safefree(PL_osname); /* $^O */
924 SvREFCNT_dec(PL_statname);
928 /* defgv, aka *_ should be taken care of elsewhere */
930 /* clean up after study() */
931 SvREFCNT_dec(PL_lastscream);
932 PL_lastscream = NULL;
933 Safefree(PL_screamfirst);
935 Safefree(PL_screamnext);
939 Safefree(PL_efloatbuf);
943 /* startup and shutdown function lists */
944 SvREFCNT_dec(PL_beginav);
945 SvREFCNT_dec(PL_beginav_save);
946 SvREFCNT_dec(PL_endav);
947 SvREFCNT_dec(PL_checkav);
948 SvREFCNT_dec(PL_checkav_save);
949 SvREFCNT_dec(PL_unitcheckav);
950 SvREFCNT_dec(PL_unitcheckav_save);
951 SvREFCNT_dec(PL_initav);
953 PL_beginav_save = NULL;
956 PL_checkav_save = NULL;
957 PL_unitcheckav = NULL;
958 PL_unitcheckav_save = NULL;
961 /* shortcuts just get cleared */
970 PL_last_in_gv = NULL;
978 PL_DBassertion = NULL;
983 SvREFCNT_dec(PL_argvout_stack);
984 PL_argvout_stack = NULL;
986 SvREFCNT_dec(PL_modglobal);
988 SvREFCNT_dec(PL_preambleav);
989 PL_preambleav = NULL;
990 SvREFCNT_dec(PL_subname);
992 #ifdef PERL_USES_PL_PIDSTATUS
993 SvREFCNT_dec(PL_pidstatus);
996 SvREFCNT_dec(PL_toptarget);
998 SvREFCNT_dec(PL_bodytarget);
999 PL_bodytarget = NULL;
1000 PL_formtarget = NULL;
1002 /* free locale stuff */
1003 #ifdef USE_LOCALE_COLLATE
1004 Safefree(PL_collation_name);
1005 PL_collation_name = NULL;
1008 #ifdef USE_LOCALE_NUMERIC
1009 Safefree(PL_numeric_name);
1010 PL_numeric_name = NULL;
1011 SvREFCNT_dec(PL_numeric_radix_sv);
1012 PL_numeric_radix_sv = NULL;
1015 /* clear utf8 character classes */
1016 SvREFCNT_dec(PL_utf8_alnum);
1017 SvREFCNT_dec(PL_utf8_alnumc);
1018 SvREFCNT_dec(PL_utf8_ascii);
1019 SvREFCNT_dec(PL_utf8_alpha);
1020 SvREFCNT_dec(PL_utf8_space);
1021 SvREFCNT_dec(PL_utf8_cntrl);
1022 SvREFCNT_dec(PL_utf8_graph);
1023 SvREFCNT_dec(PL_utf8_digit);
1024 SvREFCNT_dec(PL_utf8_upper);
1025 SvREFCNT_dec(PL_utf8_lower);
1026 SvREFCNT_dec(PL_utf8_print);
1027 SvREFCNT_dec(PL_utf8_punct);
1028 SvREFCNT_dec(PL_utf8_xdigit);
1029 SvREFCNT_dec(PL_utf8_mark);
1030 SvREFCNT_dec(PL_utf8_toupper);
1031 SvREFCNT_dec(PL_utf8_totitle);
1032 SvREFCNT_dec(PL_utf8_tolower);
1033 SvREFCNT_dec(PL_utf8_tofold);
1034 SvREFCNT_dec(PL_utf8_idstart);
1035 SvREFCNT_dec(PL_utf8_idcont);
1036 PL_utf8_alnum = NULL;
1037 PL_utf8_alnumc = NULL;
1038 PL_utf8_ascii = NULL;
1039 PL_utf8_alpha = NULL;
1040 PL_utf8_space = NULL;
1041 PL_utf8_cntrl = NULL;
1042 PL_utf8_graph = NULL;
1043 PL_utf8_digit = NULL;
1044 PL_utf8_upper = NULL;
1045 PL_utf8_lower = NULL;
1046 PL_utf8_print = NULL;
1047 PL_utf8_punct = NULL;
1048 PL_utf8_xdigit = NULL;
1049 PL_utf8_mark = NULL;
1050 PL_utf8_toupper = NULL;
1051 PL_utf8_totitle = NULL;
1052 PL_utf8_tolower = NULL;
1053 PL_utf8_tofold = NULL;
1054 PL_utf8_idstart = NULL;
1055 PL_utf8_idcont = NULL;
1057 if (!specialWARN(PL_compiling.cop_warnings))
1058 PerlMemShared_free(PL_compiling.cop_warnings);
1059 PL_compiling.cop_warnings = NULL;
1060 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1061 PL_compiling.cop_hints_hash = NULL;
1062 CopFILE_free(&PL_compiling);
1063 CopSTASH_free(&PL_compiling);
1065 /* Prepare to destruct main symbol table. */
1070 SvREFCNT_dec(PL_curstname);
1071 PL_curstname = NULL;
1073 /* clear queued errors */
1074 SvREFCNT_dec(PL_errors);
1077 SvREFCNT_dec(PL_isarev);
1080 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1081 if (PL_scopestack_ix != 0)
1082 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1083 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1084 (long)PL_scopestack_ix);
1085 if (PL_savestack_ix != 0)
1086 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1087 "Unbalanced saves: %ld more saves than restores\n",
1088 (long)PL_savestack_ix);
1089 if (PL_tmps_floor != -1)
1090 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1091 (long)PL_tmps_floor + 1);
1092 if (cxstack_ix != -1)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1094 (long)cxstack_ix + 1);
1097 /* Now absolutely destruct everything, somehow or other, loops or no. */
1098 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1099 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1101 /* the 2 is for PL_fdpid and PL_strtab */
1102 while (PL_sv_count > 2 && sv_clean_all())
1105 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1106 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1107 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1108 SvFLAGS(PL_strtab) |= SVt_PVHV;
1110 AvREAL_off(PL_fdpid); /* no surviving entries */
1111 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1114 #ifdef HAVE_INTERP_INTERN
1118 /* Destruct the global string table. */
1120 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1121 * so that sv_free() won't fail on them.
1122 * Now that the global string table is using a single hunk of memory
1123 * for both HE and HEK, we either need to explicitly unshare it the
1124 * correct way, or actually free things here.
1127 const I32 max = HvMAX(PL_strtab);
1128 HE * const * const array = HvARRAY(PL_strtab);
1129 HE *hent = array[0];
1132 if (hent && ckWARN_d(WARN_INTERNAL)) {
1133 HE * const next = HeNEXT(hent);
1134 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1135 "Unbalanced string table refcount: (%ld) for \"%s\"",
1136 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1143 hent = array[riter];
1148 HvARRAY(PL_strtab) = 0;
1149 HvTOTALKEYS(PL_strtab) = 0;
1150 HvFILL(PL_strtab) = 0;
1152 SvREFCNT_dec(PL_strtab);
1155 /* free the pointer tables used for cloning */
1156 ptr_table_free(PL_ptr_table);
1157 PL_ptr_table = (PTR_TBL_t*)NULL;
1160 /* free special SVs */
1162 SvREFCNT(&PL_sv_yes) = 0;
1163 sv_clear(&PL_sv_yes);
1164 SvANY(&PL_sv_yes) = NULL;
1165 SvFLAGS(&PL_sv_yes) = 0;
1167 SvREFCNT(&PL_sv_no) = 0;
1168 sv_clear(&PL_sv_no);
1169 SvANY(&PL_sv_no) = NULL;
1170 SvFLAGS(&PL_sv_no) = 0;
1174 for (i=0; i<=2; i++) {
1175 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1176 sv_clear(PERL_DEBUG_PAD(i));
1177 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1178 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1182 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1183 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1185 #ifdef DEBUG_LEAKING_SCALARS
1186 if (PL_sv_count != 0) {
1191 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1192 svend = &sva[SvREFCNT(sva)];
1193 for (sv = sva + 1; sv < svend; ++sv) {
1194 if (SvTYPE(sv) != SVTYPEMASK) {
1195 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1197 " refcnt=%"UVuf pTHX__FORMAT "\n"
1198 "\tallocated at %s:%d %s %s%s\n",
1199 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1200 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1202 sv->sv_debug_inpad ? "for" : "by",
1203 sv->sv_debug_optype ?
1204 PL_op_name[sv->sv_debug_optype]: "(none)",
1205 sv->sv_debug_cloned ? " (cloned)" : ""
1207 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1208 Perl_dump_sv_child(aTHX_ sv);
1214 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1218 /* Wait for up to 4 seconds for child to terminate.
1219 This seems to be the least effort way of timing out on reaping
1221 struct timeval waitfor = {4, 0};
1222 int sock = PL_dumper_fd;
1226 FD_SET(sock, &rset);
1227 select(sock + 1, &rset, NULL, NULL, &waitfor);
1228 waitpid(child, &status, WNOHANG);
1235 #ifdef PERL_DEBUG_READONLY_OPS
1241 #if defined(PERLIO_LAYERS)
1242 /* No more IO - including error messages ! */
1243 PerlIO_cleanup(aTHX);
1246 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1247 as currently layers use it rather than NULL as a marker
1248 for no arg - and will try and SvREFCNT_dec it.
1250 SvREFCNT(&PL_sv_undef) = 0;
1251 SvREADONLY_off(&PL_sv_undef);
1253 Safefree(PL_origfilename);
1254 PL_origfilename = NULL;
1255 Safefree(PL_reg_start_tmp);
1256 PL_reg_start_tmp = (char**)NULL;
1257 PL_reg_start_tmpl = 0;
1258 Safefree(PL_reg_curpm);
1259 Safefree(PL_reg_poscache);
1260 free_tied_hv_pool();
1261 Safefree(PL_op_mask);
1262 Safefree(PL_psig_ptr);
1263 PL_psig_ptr = (SV**)NULL;
1264 Safefree(PL_psig_name);
1265 PL_psig_name = (SV**)NULL;
1266 Safefree(PL_bitcount);
1268 Safefree(PL_psig_pend);
1269 PL_psig_pend = (int*)NULL;
1272 PL_tainting = FALSE;
1273 PL_taint_warn = FALSE;
1274 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1277 DEBUG_P(debprofdump());
1279 #ifdef USE_REENTRANT_API
1280 Perl_reentrant_free(aTHX);
1285 while (PL_regmatch_slab) {
1286 regmatch_slab *s = PL_regmatch_slab;
1287 PL_regmatch_slab = PL_regmatch_slab->next;
1291 /* As the absolutely last thing, free the non-arena SV for mess() */
1294 /* we know that type == SVt_PVMG */
1296 /* it could have accumulated taint magic */
1299 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1300 moremagic = mg->mg_moremagic;
1301 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1303 Safefree(mg->mg_ptr);
1307 /* we know that type >= SVt_PV */
1308 SvPV_free(PL_mess_sv);
1309 Safefree(SvANY(PL_mess_sv));
1310 Safefree(PL_mess_sv);
1317 =for apidoc perl_free
1319 Releases a Perl interpreter. See L<perlembed>.
1329 if (PL_veto_cleanup)
1332 #ifdef PERL_TRACK_MEMPOOL
1335 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1336 * value as we're probably hunting memory leaks then
1338 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1339 if (!s || atoi(s) == 0) {
1340 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1341 thread at thread exit. */
1342 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1343 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1348 #if defined(WIN32) || defined(NETWARE)
1349 # if defined(PERL_IMPLICIT_SYS)
1352 void *host = nw_internal_host;
1354 void *host = w32_internal_host;
1356 PerlMem_free(aTHXx);
1358 nw_delete_internal_host(host);
1360 win32_delete_internal_host(host);
1364 PerlMem_free(aTHXx);
1367 PerlMem_free(aTHXx);
1371 #if defined(USE_ITHREADS)
1372 /* provide destructors to clean up the thread key when libperl is unloaded */
1373 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1375 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1376 #pragma fini "perl_fini"
1377 #elif defined(__sun) && !defined(__GNUC__)
1378 #pragma fini (perl_fini)
1382 #if defined(__GNUC__)
1383 __attribute__((destructor))
1388 if (PL_curinterp && !PL_veto_cleanup)
1393 #endif /* THREADS */
1396 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1399 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1400 PL_exitlist[PL_exitlistlen].fn = fn;
1401 PL_exitlist[PL_exitlistlen].ptr = ptr;
1405 #ifdef HAS_PROCSELFEXE
1406 /* This is a function so that we don't hold on to MAXPATHLEN
1407 bytes of stack longer than necessary
1410 S_procself_val(pTHX_ SV *sv, const char *arg0)
1412 char buf[MAXPATHLEN];
1413 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1415 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1416 includes a spurious NUL which will cause $^X to fail in system
1417 or backticks (this will prevent extensions from being built and
1418 many tests from working). readlink is not meant to add a NUL.
1419 Normal readlink works fine.
1421 if (len > 0 && buf[len-1] == '\0') {
1425 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1426 returning the text "unknown" from the readlink rather than the path
1427 to the executable (or returning an error from the readlink). Any valid
1428 path has a '/' in it somewhere, so use that to validate the result.
1429 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1431 if (len > 0 && memchr(buf, '/', len)) {
1432 sv_setpvn(sv,buf,len);
1438 #endif /* HAS_PROCSELFEXE */
1441 S_set_caret_X(pTHX) {
1443 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1445 #ifdef HAS_PROCSELFEXE
1446 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1449 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1451 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1458 =for apidoc perl_parse
1460 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1466 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1473 PERL_UNUSED_ARG(my_perl);
1475 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1478 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1479 setuid perl scripts securely.\n");
1480 #endif /* IAMSUID */
1483 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1484 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1485 * This MUST be done before any hash stores or fetches take place.
1486 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1487 * yourself, it is your responsibility to provide a good random seed!
1488 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1489 if (!PL_rehash_seed_set)
1490 PL_rehash_seed = get_hash_seed();
1492 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1494 if (s && (atoi(s) == 1))
1495 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1497 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1502 if (PL_origalen != 0) {
1503 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1506 /* Set PL_origalen be the sum of the contiguous argv[]
1507 * elements plus the size of the env in case that it is
1508 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1509 * as the maximum modifiable length of $0. In the worst case
1510 * the area we are able to modify is limited to the size of
1511 * the original argv[0]. (See below for 'contiguous', though.)
1513 const char *s = NULL;
1516 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1517 /* Do the mask check only if the args seem like aligned. */
1519 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1521 /* See if all the arguments are contiguous in memory. Note
1522 * that 'contiguous' is a loose term because some platforms
1523 * align the argv[] and the envp[]. If the arguments look
1524 * like non-aligned, assume that they are 'strictly' or
1525 * 'traditionally' contiguous. If the arguments look like
1526 * aligned, we just check that they are within aligned
1527 * PTRSIZE bytes. As long as no system has something bizarre
1528 * like the argv[] interleaved with some other data, we are
1529 * fine. (Did I just evoke Murphy's Law?) --jhi */
1530 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1532 for (i = 1; i < PL_origargc; i++) {
1533 if ((PL_origargv[i] == s + 1
1535 || PL_origargv[i] == s + 2
1540 (PL_origargv[i] > s &&
1542 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1553 #ifndef PERL_USE_SAFE_PUTENV
1554 /* Can we grab env area too to be used as the area for $0? */
1555 if (s && PL_origenviron && !PL_use_safe_putenv) {
1556 if ((PL_origenviron[0] == s + 1)
1559 (PL_origenviron[0] > s &&
1560 PL_origenviron[0] <=
1561 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1564 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1565 s = PL_origenviron[0];
1568 my_setenv("NoNe SuCh", NULL);
1569 /* Force copy of environment. */
1570 for (i = 1; PL_origenviron[i]; i++) {
1571 if (PL_origenviron[i] == s + 1
1574 (PL_origenviron[i] > s &&
1575 PL_origenviron[i] <=
1576 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1579 s = PL_origenviron[i];
1587 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1589 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1594 /* Come here if running an undumped a.out. */
1596 PL_origfilename = savepv(argv[0]);
1597 PL_do_undump = FALSE;
1598 cxstack_ix = -1; /* start label stack again */
1600 assert (!PL_tainted);
1602 S_set_caret_X(aTHX);
1604 init_postdump_symbols(argc,argv,env);
1609 op_free(PL_main_root);
1610 PL_main_root = NULL;
1612 PL_main_start = NULL;
1613 SvREFCNT_dec(PL_main_cv);
1617 oldscope = PL_scopestack_ix;
1618 PL_dowarn = G_WARN_OFF;
1623 parse_body(env,xsinit);
1625 call_list(oldscope, PL_unitcheckav);
1627 call_list(oldscope, PL_checkav);
1634 /* my_exit() was called */
1635 while (PL_scopestack_ix > oldscope)
1638 PL_curstash = PL_defstash;
1640 call_list(oldscope, PL_unitcheckav);
1642 call_list(oldscope, PL_checkav);
1646 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1655 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1659 int argc = PL_origargc;
1660 char **argv = PL_origargv;
1661 const char *scriptname = NULL;
1662 VOL bool dosearch = FALSE;
1663 const char *validarg = "";
1665 register char *s, c;
1666 const char *cddir = NULL;
1667 #ifdef USE_SITECUSTOMIZE
1668 bool minus_f = FALSE;
1670 SV *linestr_sv = newSV_type(SVt_PVIV);
1672 SvGROW(linestr_sv, 80);
1673 sv_setpvn(linestr_sv,"",0);
1675 sv = newSVpvs(""); /* first used for -I flags */
1679 for (argc--,argv++; argc > 0; argc--,argv++) {
1680 if (argv[0][0] != '-' || !argv[0][1])
1684 validarg = " PHOOEY ";
1688 * Can we rely on the kernel to start scripts with argv[1] set to
1689 * contain all #! line switches (the whole line)? (argv[0] is set to
1690 * the interpreter name, argv[2] to the script name; argv[3] and
1691 * above may contain other arguments.)
1698 #ifndef PERL_STRICT_CR
1723 if ((s = moreswitches(s)))
1728 CHECK_MALLOC_TOO_LATE_FOR('t');
1729 if( !PL_tainting ) {
1730 PL_taint_warn = TRUE;
1736 CHECK_MALLOC_TOO_LATE_FOR('T');
1738 PL_taint_warn = FALSE;
1746 #ifdef MACOS_TRADITIONAL
1747 /* ignore -e for Dev:Pseudo argument */
1748 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1751 forbid_setid('e', -1);
1753 PL_e_script = newSVpvs("");
1754 filter_add(read_e_script, NULL);
1757 sv_catpv(PL_e_script, s);
1759 sv_catpv(PL_e_script, argv[1]);
1763 Perl_croak(aTHX_ "No code specified for -%c", c);
1764 sv_catpvs(PL_e_script, "\n");
1768 #ifdef USE_SITECUSTOMIZE
1774 case 'I': /* -I handled both here and in moreswitches() */
1775 forbid_setid('I', -1);
1776 if (!*++s && (s=argv[1]) != NULL) {
1780 STRLEN len = strlen(s);
1781 const char * const p = savepvn(s, len);
1782 incpush(p, TRUE, TRUE, FALSE, FALSE);
1783 sv_catpvs(sv, "-I");
1784 sv_catpvn(sv, p, len);
1789 Perl_croak(aTHX_ "No directory specified for -I");
1792 forbid_setid('P', -1);
1793 PL_preprocess = TRUE;
1797 forbid_setid('S', -1);
1805 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1809 opts_prog = newSVpvs("print Config::myconfig(),");
1811 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1813 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1815 opts = SvCUR(opts_prog);
1817 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1821 # ifdef DEBUG_LEAKING_SCALARS
1822 " DEBUG_LEAKING_SCALARS"
1824 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1825 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1827 # ifdef FAKE_THREADS
1830 # ifdef MULTIPLICITY
1839 # ifdef PERL_DEBUG_READONLY_OPS
1840 " PERL_DEBUG_READONLY_OPS"
1842 # ifdef PERL_DONT_CREATE_GVSV
1843 " PERL_DONT_CREATE_GVSV"
1845 # ifdef PERL_GLOBAL_STRUCT
1846 " PERL_GLOBAL_STRUCT"
1848 # ifdef PERL_IMPLICIT_CONTEXT
1849 " PERL_IMPLICIT_CONTEXT"
1851 # ifdef PERL_IMPLICIT_SYS
1852 " PERL_IMPLICIT_SYS"
1857 # ifdef PERL_MALLOC_WRAP
1860 # ifdef PERL_MEM_LOG
1863 # ifdef PERL_MEM_LOG_ENV
1866 # ifdef PERL_MEM_LOG_ENV_FD
1867 " PERL_MEM_LOG_ENV_FD"
1869 # ifdef PERL_MEM_LOG_STDERR
1870 " PERL_MEM_LOG_STDERR"
1872 # ifdef PERL_MEM_LOG_TIMESTAMP
1873 " PERL_MEM_LOG_TIMESTAMP"
1875 # ifdef PERL_NEED_APPCTX
1878 # ifdef PERL_NEED_TIMESBASE
1879 " PERL_NEED_TIMESBASE"
1881 # ifdef PERL_OLD_COPY_ON_WRITE
1882 " PERL_OLD_COPY_ON_WRITE"
1887 # ifdef PERL_TRACK_MEMPOOL
1888 " PERL_TRACK_MEMPOOL"
1890 # ifdef PERL_USE_SAFE_PUTENV
1891 " PERL_USE_SAFE_PUTENV"
1893 # ifdef PERL_USES_PL_PIDSTATUS
1894 " PERL_USES_PL_PIDSTATUS"
1896 # ifdef PL_OP_SLAB_ALLOC
1899 # ifdef THREADS_HAVE_PIDS
1900 " THREADS_HAVE_PIDS"
1902 # ifdef USE_64_BIT_ALL
1905 # ifdef USE_64_BIT_INT
1908 # ifdef USE_ITHREADS
1911 # ifdef USE_LARGE_FILES
1914 # ifdef USE_LONG_DOUBLE
1920 # ifdef USE_REENTRANT_API
1921 " USE_REENTRANT_API"
1926 # ifdef USE_SITECUSTOMIZE
1927 " USE_SITECUSTOMIZE"
1934 while (SvCUR(opts_prog) > opts+76) {
1935 /* find last space after "options: " and before col 76
1939 char * const pv = SvPV_nolen(opts_prog);
1940 const char c = pv[opts+76];
1942 space = strrchr(pv+opts+26, ' ');
1944 if (!space) break; /* "Can't happen" */
1946 /* break the line before that space */
1949 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1950 STR_WITH_LEN("\\n "));
1953 sv_catpvs(opts_prog,"\\n\",");
1955 #if defined(LOCAL_PATCH_COUNT)
1956 if (LOCAL_PATCH_COUNT > 0) {
1958 sv_catpvs(opts_prog,
1959 "\" Locally applied patches:\\n\",");
1960 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1961 if (PL_localpatches[i])
1962 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1963 0, PL_localpatches[i], 0);
1967 Perl_sv_catpvf(aTHX_ opts_prog,
1968 "\" Built under %s\\n\"",OSNAME);
1971 Perl_sv_catpvf(aTHX_ opts_prog,
1972 ",\" Compiled at %s %s\\n\"",__DATE__,
1975 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1979 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1980 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1981 "sort grep {/^PERL/} keys %ENV; ");
1983 sv_catpvs(opts_prog,
1984 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1986 sv_catpvs(opts_prog,
1987 "print \" \\%ENV:\\n @env\\n\" if @env;"
1988 "print \" \\@INC:\\n @INC\\n\";");
1992 opts_prog = Perl_newSVpvf(aTHX_
1993 "Config::config_vars(qw%c%s%c)",
1997 av_push(PL_preambleav, opts_prog);
1998 /* don't look for script or read stdin */
1999 scriptname = BIT_BUCKET;
2003 PL_doextract = TRUE;
2011 if (!*++s || isSPACE(*s)) {
2015 /* catch use of gnu style long options */
2016 if (strEQ(s, "version")) {
2020 if (strEQ(s, "help")) {
2027 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2033 #ifndef SECURE_INTERNAL_GETENV
2036 (s = PerlEnv_getenv("PERL5OPT")))
2038 const char *popt = s;
2041 if (*s == '-' && *(s+1) == 'T') {
2042 CHECK_MALLOC_TOO_LATE_FOR('T');
2044 PL_taint_warn = FALSE;
2047 char *popt_copy = NULL;
2060 if (!strchr("CDIMUdmtwA", *s))
2061 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2065 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2066 s = popt_copy + (s - popt);
2067 d = popt_copy + (d - popt);
2074 if( !PL_tainting ) {
2075 PL_taint_warn = TRUE;
2085 #ifdef USE_SITECUSTOMIZE
2087 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2088 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2093 scriptname = argv[0];
2096 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2098 else if (scriptname == NULL) {
2100 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2106 /* Set $^X early so that it can be used for relocatable paths in @INC */
2107 assert (!PL_tainted);
2109 S_set_caret_X(aTHX);
2116 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2118 validate_suid(validarg, scriptname, fdscript, suidscript,
2122 # if defined(SIGCHLD) || defined(SIGCLD)
2125 # define SIGCHLD SIGCLD
2127 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2128 if (sigstate == (Sighandler_t) SIG_IGN) {
2129 if (ckWARN(WARN_SIGNAL))
2130 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2131 "Can't ignore signal CHLD, forcing to default");
2132 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2139 #ifdef MACOS_TRADITIONAL
2140 || gMacPerl_AlwaysExtract
2144 /* This will croak if suidscript is >= 0, as -x cannot be used with
2146 forbid_setid('x', suidscript);
2147 /* Hence you can't get here if suidscript >= 0 */
2149 find_beginning(linestr_sv, rsfp);
2150 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2151 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2155 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2156 CvUNIQUE_on(PL_compcv);
2158 CvPADLIST(PL_compcv) = pad_new(0);
2160 PL_isarev = newHV();
2163 boot_core_UNIVERSAL();
2164 boot_core_xsutils();
2168 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2170 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2176 # ifdef HAS_SOCKS5_INIT
2177 socks5_init(argv[0]);
2183 init_predump_symbols();
2184 /* init_postdump_symbols not currently designed to be called */
2185 /* more than once (ENV isn't cleared first, for example) */
2186 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2188 init_postdump_symbols(argc,argv,env);
2190 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2191 * or explicitly in some platforms.
2192 * locale.c:Perl_init_i18nl10n() if the environment
2193 * look like the user wants to use UTF-8. */
2194 #if defined(__SYMBIAN32__)
2195 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2198 /* Requires init_predump_symbols(). */
2199 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2204 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2205 * and the default open disciplines. */
2206 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2207 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2211 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2213 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2214 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2215 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2217 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2218 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2219 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2221 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2222 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2225 sv_setpvn(sv, ":utf8\0:utf8", 11);
2227 sv_setpvn(sv, ":utf8\0", 6);
2230 sv_setpvn(sv, "\0:utf8", 6);
2236 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2237 if (strEQ(s, "unsafe"))
2238 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2239 else if (strEQ(s, "safe"))
2240 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2242 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2246 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2250 PL_xmlfp = PerlIO_stdout();
2252 PL_xmlfp = PerlIO_open(s, "w");
2254 Perl_croak(aTHX_ "Can't open %s", s);
2256 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2258 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2259 PL_madskills = atoi(s);
2260 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2264 lex_start(linestr_sv, rsfp);
2265 PL_subname = newSVpvs("main");
2267 /* now parse the script */
2269 SETERRNO(0,SS_NORMAL);
2271 #ifdef MACOS_TRADITIONAL
2272 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2274 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2276 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2277 MacPerl_MPWFileName(PL_origfilename));
2281 if (yyparse() || PL_error_count) {
2283 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2285 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2290 CopLINE_set(PL_curcop, 0);
2291 PL_curstash = PL_defstash;
2292 PL_preprocess = FALSE;
2294 SvREFCNT_dec(PL_e_script);
2302 SAVECOPFILE(PL_curcop);
2303 SAVECOPLINE(PL_curcop);
2304 gv_check(PL_defstash);
2311 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2312 dump_mstats("after compilation:");
2321 =for apidoc perl_run
2323 Tells a Perl interpreter to run. See L<perlembed>.
2336 PERL_UNUSED_ARG(my_perl);
2338 oldscope = PL_scopestack_ix;
2346 cxstack_ix = -1; /* start context stack again */
2348 case 0: /* normal completion */
2352 case 2: /* my_exit() */
2353 while (PL_scopestack_ix > oldscope)
2356 PL_curstash = PL_defstash;
2357 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2358 PL_endav && !PL_minus_c)
2359 call_list(oldscope, PL_endav);
2361 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2362 dump_mstats("after execution: ");
2368 POPSTACK_TO(PL_mainstack);
2371 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2382 S_run_body(pTHX_ I32 oldscope)
2385 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2386 PL_sawampersand ? "Enabling" : "Omitting"));
2388 if (!PL_restartop) {
2392 exit(0); /* less likely to core dump than my_exit(0) */
2395 DEBUG_x(dump_all());
2398 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2400 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2404 #ifdef MACOS_TRADITIONAL
2405 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2406 (gMacPerl_ErrorFormat ? "# " : ""),
2407 MacPerl_MPWFileName(PL_origfilename));
2409 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2413 if (PERLDB_SINGLE && PL_DBsingle)
2414 sv_setiv(PL_DBsingle, 1);
2416 call_list(oldscope, PL_initav);
2417 #ifdef PERL_DEBUG_READONLY_OPS
2418 Perl_pending_Slabs_to_ro(aTHX);
2425 PL_op = PL_restartop;
2429 else if (PL_main_start) {
2430 CvDEPTH(PL_main_cv) = 1;
2431 PL_op = PL_main_start;
2439 =head1 SV Manipulation Functions
2441 =for apidoc p||get_sv
2443 Returns the SV of the specified Perl scalar. If C<create> is set and the
2444 Perl variable does not exist then it will be created. If C<create> is not
2445 set and the variable does not exist then NULL is returned.
2451 Perl_get_sv(pTHX_ const char *name, I32 create)
2454 gv = gv_fetchpv(name, create, SVt_PV);
2461 =head1 Array Manipulation Functions
2463 =for apidoc p||get_av
2465 Returns the AV of the specified Perl array. If C<create> is set and the
2466 Perl variable does not exist then it will be created. If C<create> is not
2467 set and the variable does not exist then NULL is returned.
2473 Perl_get_av(pTHX_ const char *name, I32 create)
2475 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2484 =head1 Hash Manipulation Functions
2486 =for apidoc p||get_hv
2488 Returns the HV of the specified Perl hash. If C<create> is set and the
2489 Perl variable does not exist then it will be created. If C<create> is not
2490 set and the variable does not exist then NULL is returned.
2496 Perl_get_hv(pTHX_ const char *name, I32 create)
2498 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2507 =head1 CV Manipulation Functions
2509 =for apidoc p||get_cvn_flags
2511 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2512 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2513 exist then it will be declared (which has the same effect as saying
2514 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2515 then NULL is returned.
2517 =for apidoc p||get_cv
2519 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2525 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2527 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2528 /* XXX this is probably not what they think they're getting.
2529 * It has the same effect as "sub name;", i.e. just a forward
2531 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2532 SV *const sv = newSVpvn(name,len);
2533 SvFLAGS(sv) |= flags & SVf_UTF8;
2534 return newSUB(start_subparse(FALSE, 0),
2535 newSVOP(OP_CONST, 0, sv),
2544 Perl_get_cv(pTHX_ const char *name, I32 flags)
2546 return get_cvn_flags(name, strlen(name), flags);
2549 /* Be sure to refetch the stack pointer after calling these routines. */
2553 =head1 Callback Functions
2555 =for apidoc p||call_argv
2557 Performs a callback to the specified Perl sub. See L<perlcall>.
2563 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2565 /* See G_* flags in cop.h */
2566 /* null terminated arg list */
2574 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2579 return call_pv(sub_name, flags);
2583 =for apidoc p||call_pv
2585 Performs a callback to the specified Perl sub. See L<perlcall>.
2591 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2592 /* name of the subroutine */
2593 /* See G_* flags in cop.h */
2595 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2599 =for apidoc p||call_method
2601 Performs a callback to the specified Perl method. The blessed object must
2602 be on the stack. See L<perlcall>.
2608 Perl_call_method(pTHX_ const char *methname, I32 flags)
2609 /* name of the subroutine */
2610 /* See G_* flags in cop.h */
2612 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2615 /* May be called with any of a CV, a GV, or an SV containing the name. */
2617 =for apidoc p||call_sv
2619 Performs a callback to the Perl sub whose name is in the SV. See
2626 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2627 /* See G_* flags in cop.h */
2630 LOGOP myop; /* fake syntax tree node */
2635 bool oldcatch = CATCH_GET;
2637 OP* const oldop = PL_op;
2640 if (flags & G_DISCARD) {
2645 Zero(&myop, 1, LOGOP);
2646 myop.op_next = NULL;
2647 if (!(flags & G_NOARGS))
2648 myop.op_flags |= OPf_STACKED;
2649 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2650 (flags & G_ARRAY) ? OPf_WANT_LIST :
2655 EXTEND(PL_stack_sp, 1);
2656 *++PL_stack_sp = sv;
2658 oldscope = PL_scopestack_ix;
2660 if (PERLDB_SUB && PL_curstash != PL_debstash
2661 /* Handle first BEGIN of -d. */
2662 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2663 /* Try harder, since this may have been a sighandler, thus
2664 * curstash may be meaningless. */
2665 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2666 && !(flags & G_NODEBUG))
2667 PL_op->op_private |= OPpENTERSUB_DB;
2669 if (flags & G_METHOD) {
2670 Zero(&method_op, 1, UNOP);
2671 method_op.op_next = PL_op;
2672 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2673 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2674 PL_op = (OP*)&method_op;
2677 if (!(flags & G_EVAL)) {
2679 CALL_BODY_SUB((OP*)&myop);
2680 retval = PL_stack_sp - (PL_stack_base + oldmark);
2681 CATCH_SET(oldcatch);
2684 myop.op_other = (OP*)&myop;
2686 create_eval_scope(flags|G_FAKINGEVAL);
2694 CALL_BODY_SUB((OP*)&myop);
2695 retval = PL_stack_sp - (PL_stack_base + oldmark);
2696 if (!(flags & G_KEEPERR))
2697 sv_setpvn(ERRSV,"",0);
2703 /* my_exit() was called */
2704 PL_curstash = PL_defstash;
2707 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2708 Perl_croak(aTHX_ "Callback called exit");
2713 PL_op = PL_restartop;
2717 PL_stack_sp = PL_stack_base + oldmark;
2718 if (flags & G_ARRAY)
2722 *++PL_stack_sp = &PL_sv_undef;
2727 if (PL_scopestack_ix > oldscope)
2728 delete_eval_scope();
2732 if (flags & G_DISCARD) {
2733 PL_stack_sp = PL_stack_base + oldmark;
2742 /* Eval a string. The G_EVAL flag is always assumed. */
2745 =for apidoc p||eval_sv
2747 Tells Perl to C<eval> the string in the SV.
2753 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2755 /* See G_* flags in cop.h */
2759 UNOP myop; /* fake syntax tree node */
2760 VOL I32 oldmark = SP - PL_stack_base;
2763 OP* const oldop = PL_op;
2766 if (flags & G_DISCARD) {
2773 Zero(PL_op, 1, UNOP);
2774 EXTEND(PL_stack_sp, 1);
2775 *++PL_stack_sp = sv;
2777 if (!(flags & G_NOARGS))
2778 myop.op_flags = OPf_STACKED;
2779 myop.op_next = NULL;
2780 myop.op_type = OP_ENTEREVAL;
2781 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2782 (flags & G_ARRAY) ? OPf_WANT_LIST :
2784 if (flags & G_KEEPERR)
2785 myop.op_flags |= OPf_SPECIAL;
2787 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2788 * before a PUSHEVAL, which corrupts the stack after a croak */
2789 TAINT_PROPER("eval_sv()");
2795 CALL_BODY_EVAL((OP*)&myop);
2796 retval = PL_stack_sp - (PL_stack_base + oldmark);
2797 if (!(flags & G_KEEPERR))
2798 sv_setpvn(ERRSV,"",0);
2804 /* my_exit() was called */
2805 PL_curstash = PL_defstash;
2808 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2809 Perl_croak(aTHX_ "Callback called exit");
2814 PL_op = PL_restartop;
2818 PL_stack_sp = PL_stack_base + oldmark;
2819 if (flags & G_ARRAY)
2823 *++PL_stack_sp = &PL_sv_undef;
2829 if (flags & G_DISCARD) {
2830 PL_stack_sp = PL_stack_base + oldmark;
2840 =for apidoc p||eval_pv
2842 Tells Perl to C<eval> the given string and return an SV* result.
2848 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2852 SV* sv = newSVpv(p, 0);
2854 eval_sv(sv, G_SCALAR);
2861 if (croak_on_error && SvTRUE(ERRSV)) {
2862 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2868 /* Require a module. */
2871 =head1 Embedding Functions
2873 =for apidoc p||require_pv
2875 Tells Perl to C<require> the file named by the string argument. It is
2876 analogous to the Perl code C<eval "require '$file'">. It's even
2877 implemented that way; consider using load_module instead.
2882 Perl_require_pv(pTHX_ const char *pv)
2887 PUSHSTACKi(PERLSI_REQUIRE);
2889 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2890 eval_sv(sv_2mortal(sv), G_DISCARD);
2896 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2898 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2901 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2905 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2907 /* This message really ought to be max 23 lines.
2908 * Removed -h because the user already knows that option. Others? */
2910 static const char * const usage_msg[] = {
2911 "-0[octal] specify record separator (\\0, if no argument)",
2912 "-A[mod][=pattern] activate all/given assertions",
2913 "-a autosplit mode with -n or -p (splits $_ into @F)",
2914 "-C[number/list] enables the listed Unicode features",
2915 "-c check syntax only (runs BEGIN and CHECK blocks)",
2916 "-d[:debugger] run program under debugger",
2917 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2918 "-e program one line of program (several -e's allowed, omit programfile)",
2919 "-E program like -e, but enables all optional features",
2920 "-f don't do $sitelib/sitecustomize.pl at startup",
2921 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2922 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2923 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2924 "-l[octal] enable line ending processing, specifies line terminator",
2925 "-[mM][-]module execute \"use/no module...\" before executing program",
2926 "-n assume \"while (<>) { ... }\" loop around program",
2927 "-p assume loop like -n but print line also, like sed",
2928 "-P run program through C preprocessor before compilation",
2929 "-s enable rudimentary parsing for switches after programfile",
2930 "-S look for programfile using PATH environment variable",
2931 "-t enable tainting warnings",
2932 "-T enable tainting checks",
2933 "-u dump core after parsing program",
2934 "-U allow unsafe operations",
2935 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2936 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2937 "-w enable many useful warnings (RECOMMENDED)",
2938 "-W enable all warnings",
2939 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2940 "-X disable all warnings",
2944 const char * const *p = usage_msg;
2946 PerlIO_printf(PerlIO_stdout(),
2947 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2950 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2953 /* convert a string of -D options (or digits) into an int.
2954 * sets *s to point to the char after the options */
2958 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2960 static const char * const usage_msgd[] = {
2961 " Debugging flag values: (see also -d)",
2962 " p Tokenizing and parsing (with v, displays parse stack)",
2963 " s Stack snapshots (with v, displays all stacks)",
2964 " l Context (loop) stack processing",
2965 " t Trace execution",
2966 " o Method and overloading resolution",
2967 " c String/numeric conversions",
2968 " P Print profiling info, preprocessor command for -P, source file input state",
2969 " m Memory allocation",
2970 " f Format processing",
2971 " r Regular expression parsing and execution",
2972 " x Syntax tree dump",
2973 " u Tainting checks",
2974 " H Hash dump -- usurps values()",
2975 " X Scratchpad allocation",
2977 " S Thread synchronization",
2979 " R Include reference counts of dumped variables (eg when using -Ds)",
2980 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2981 " v Verbose: use in conjunction with other flags",
2983 " A Consistency checks on internal structures",
2984 " q quiet - currently only suppresses the 'EXECUTING' message",
2989 /* if adding extra options, remember to update DEBUG_MASK */
2990 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2992 for (; isALNUM(**s); (*s)++) {
2993 const char * const d = strchr(debopts,**s);
2995 i |= 1 << (d - debopts);
2996 else if (ckWARN_d(WARN_DEBUGGING))
2997 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2998 "invalid option -D%c, use -D'' to see choices\n", **s);
3001 else if (isDIGIT(**s)) {
3003 for (; isALNUM(**s); (*s)++) ;
3005 else if (givehelp) {
3006 const char *const *p = usage_msgd;
3007 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3010 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3011 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3012 "-Dp not implemented on this platform\n");
3018 /* This routine handles any switches that can be given during run */
3021 Perl_moreswitches(pTHX_ char *s)
3032 SvREFCNT_dec(PL_rs);
3033 if (s[1] == 'x' && s[2]) {
3034 const char *e = s+=2;
3040 flags = PERL_SCAN_SILENT_ILLDIGIT;
3041 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3042 if (s + numlen < e) {
3043 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3047 PL_rs = newSVpvs("");
3048 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3049 tmps = (U8*)SvPVX(PL_rs);
3050 uvchr_to_utf8(tmps, rschar);
3051 SvCUR_set(PL_rs, UNISKIP(rschar));
3056 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3057 if (rschar & ~((U8)~0))
3058 PL_rs = &PL_sv_undef;
3059 else if (!rschar && numlen >= 2)
3060 PL_rs = newSVpvs("");
3062 char ch = (char)rschar;
3063 PL_rs = newSVpvn(&ch, 1);
3066 sv_setsv(get_sv("/", TRUE), PL_rs);
3071 PL_unicode = parse_unicode_opts( (const char **)&s );
3072 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3078 while (*s && !isSPACE(*s)) ++s;
3079 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3090 forbid_setid('d', -1);
3093 /* -dt indicates to the debugger that threads will be used */
3094 if (*s == 't' && !isALNUM(s[1])) {
3096 my_setenv("PERL5DB_THREADED", "1");
3099 /* The following permits -d:Mod to accepts arguments following an =
3100 in the fashion that -MSome::Mod does. */
3101 if (*s == ':' || *s == '=') {
3103 SV * const sv = newSVpvs("use Devel::");
3105 /* We now allow -d:Module=Foo,Bar */
3106 while(isALNUM(*s) || *s==':') ++s;
3108 sv_catpv(sv, start);
3110 sv_catpvn(sv, start, s-start);
3111 /* Don't use NUL as q// delimiter here, this string goes in the
3113 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3116 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3119 PL_perldb = PERLDB_ALL;
3126 forbid_setid('D', -1);
3128 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3129 #else /* !DEBUGGING */
3130 if (ckWARN_d(WARN_DEBUGGING))
3131 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3132 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3133 for (s++; isALNUM(*s); s++) ;
3138 usage(PL_origargv[0]);
3141 Safefree(PL_inplace);
3142 #if defined(__CYGWIN__) /* do backup extension automagically */
3143 if (*(s+1) == '\0') {
3144 PL_inplace = savepvs(".bak");
3147 #endif /* __CYGWIN__ */
3149 const char * const start = ++s;
3150 while (*s && !isSPACE(*s))
3153 PL_inplace = savepvn(start, s - start);
3157 if (*s == '-') /* Additional switches on #! line. */
3161 case 'I': /* -I handled both here and in parse_body() */
3162 forbid_setid('I', -1);
3164 while (*s && isSPACE(*s))
3169 /* ignore trailing spaces (possibly followed by other switches) */
3171 for (e = p; *e && !isSPACE(*e); e++) ;
3175 } while (*p && *p != '-');
3176 e = savepvn(s, e-s);
3177 incpush(e, TRUE, TRUE, FALSE, FALSE);
3184 Perl_croak(aTHX_ "No directory specified for -I");
3190 SvREFCNT_dec(PL_ors_sv);
3196 PL_ors_sv = newSVpvs("\n");
3197 numlen = 3 + (*s == '0');
3198 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3202 if (RsPARA(PL_rs)) {
3203 PL_ors_sv = newSVpvs("\n\n");
3206 PL_ors_sv = newSVsv(PL_rs);
3211 forbid_setid('A', -1);
3214 char * const start = s;
3215 SV * const sv = newSVpvs("use assertions::activate");
3216 while(isALNUM(*s) || *s == ':') ++s;
3218 sv_catpvs(sv, "::");
3219 sv_catpvn(sv, start, s-start);
3222 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3225 else if (*s != '\0') {
3226 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3228 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3232 forbid_setid('M', -1); /* XXX ? */
3235 forbid_setid('m', -1); /* XXX ? */
3239 const char *use = "use ";
3240 /* -M-foo == 'no foo' */
3241 /* Leading space on " no " is deliberate, to make both
3242 possibilities the same length. */
3243 if (*s == '-') { use = " no "; ++s; }
3244 sv = newSVpvn(use,4);
3246 /* We allow -M'Module qw(Foo Bar)' */
3247 while(isALNUM(*s) || *s==':') ++s;
3249 sv_catpv(sv, start);
3250 if (*(start-1) == 'm') {
3252 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3253 sv_catpvs( sv, " ()");
3257 Perl_croak(aTHX_ "Module name required with -%c option",
3259 sv_catpvn(sv, start, s-start);
3260 sv_catpvs(sv, " split(/,/,q");
3261 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3263 sv_catpvs(sv, "\0)");
3266 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3269 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3280 forbid_setid('s', -1);
3281 PL_doswitches = TRUE;
3295 #ifdef MACOS_TRADITIONAL
3296 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3298 PL_do_undump = TRUE;
3306 if (!sv_derived_from(PL_patchlevel, "version"))
3307 upg_version(PL_patchlevel, TRUE);
3309 PerlIO_printf(PerlIO_stdout(),
3310 Perl_form(aTHX_ "\nThis is perl, %"SVf
3311 #ifdef PERL_PATCHNUM
3312 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3315 SVfARG(vstringify(PL_patchlevel)),
3318 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3319 PerlIO_printf(PerlIO_stdout(),
3320 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3321 SVfARG(vstringify(PL_patchlevel))));
3322 PerlIO_printf(PerlIO_stdout(),
3323 Perl_form(aTHX_ " built under %s at %s %s\n",
3324 OSNAME, __DATE__, __TIME__));
3325 PerlIO_printf(PerlIO_stdout(),
3326 Perl_form(aTHX_ " OS Specific Release: %s\n",
3330 #if defined(LOCAL_PATCH_COUNT)
3331 if (LOCAL_PATCH_COUNT > 0)
3332 PerlIO_printf(PerlIO_stdout(),
3333 "\n(with %d registered patch%s, "
3334 "see perl -V for more detail)",
3336 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "\n\nCopyright 1987-2007, Larry Wall\n");
3341 #ifdef MACOS_TRADITIONAL
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3344 "maintained by Chris Nandor\n");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3353 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3358 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "atariST series port, ++jrb bammi@cadence.com\n");
3365 PerlIO_printf(PerlIO_stdout(),
3366 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3369 PerlIO_printf(PerlIO_stdout(),
3370 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3373 PerlIO_printf(PerlIO_stdout(),
3374 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3377 PerlIO_printf(PerlIO_stdout(),
3378 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3381 PerlIO_printf(PerlIO_stdout(),
3382 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3385 PerlIO_printf(PerlIO_stdout(),
3386 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3389 PerlIO_printf(PerlIO_stdout(),
3390 "MiNT port by Guido Flohr, 1997-1999\n");
3393 PerlIO_printf(PerlIO_stdout(),
3394 "EPOC port by Olaf Flebbe, 1999-2002\n");
3397 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3398 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3401 #ifdef __SYMBIAN32__
3402 PerlIO_printf(PerlIO_stdout(),
3403 "Symbian port by Nokia, 2004-2005\n");
3405 #ifdef BINARY_BUILD_NOTICE
3406 BINARY_BUILD_NOTICE;
3408 PerlIO_printf(PerlIO_stdout(),
3410 Perl may be copied only under the terms of either the Artistic License or the\n\
3411 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3412 Complete documentation for Perl, including FAQ lists, should be found on\n\
3413 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3414 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3417 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3418 PL_dowarn |= G_WARN_ON;
3423 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3424 if (!specialWARN(PL_compiling.cop_warnings))
3425 PerlMemShared_free(PL_compiling.cop_warnings);
3426 PL_compiling.cop_warnings = pWARN_ALL ;
3430 PL_dowarn = G_WARN_ALL_OFF;
3431 if (!specialWARN(PL_compiling.cop_warnings))
3432 PerlMemShared_free(PL_compiling.cop_warnings);
3433 PL_compiling.cop_warnings = pWARN_NONE ;
3438 if (s[1] == '-') /* Additional switches on #! line. */
3443 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3449 #ifdef ALTERNATE_SHEBANG
3450 case 'S': /* OS/2 needs -S on "extproc" line. */
3458 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3463 /* compliments of Tom Christiansen */
3465 /* unexec() can be found in the Gnu emacs distribution */
3466 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3469 Perl_my_unexec(pTHX)
3471 PERL_UNUSED_CONTEXT;
3473 SV * prog = newSVpv(BIN_EXP, 0);
3474 SV * file = newSVpv(PL_origfilename, 0);
3478 sv_catpvs(prog, "/perl");
3479 sv_catpvs(file, ".perldump");
3481 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3482 /* unexec prints msg to stderr in case of failure */
3483 PerlProc_exit(status);
3486 # include <lib$routines.h>
3487 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3488 # elif defined(WIN32) || defined(__CYGWIN__)
3489 Perl_croak(aTHX_ "dump is not supported");
3491 ABORT(); /* for use with undump */
3496 /* initialize curinterp */
3502 # define PERLVAR(var,type)
3503 # define PERLVARA(var,n,type)
3504 # if defined(PERL_IMPLICIT_CONTEXT)
3505 # define PERLVARI(var,type,init) aTHX->var = init;
3506 # define PERLVARIC(var,type,init) aTHX->var = init;
3508 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3509 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3511 # include "intrpvar.h"
3512 # include "thrdvar.h"
3518 # define PERLVAR(var,type)
3519 # define PERLVARA(var,n,type)
3520 # define PERLVARI(var,type,init) PL_##var = init;
3521 # define PERLVARIC(var,type,init) PL_##var = init;
3522 # include "intrpvar.h"
3523 # include "thrdvar.h"
3530 /* As these are inside a structure, PERLVARI isn't capable of initialising
3532 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3533 PL_reg_poscache = PL_reg_starttry = NULL;
3537 S_init_main_stash(pTHX)
3542 PL_curstash = PL_defstash = newHV();
3543 /* We know that the string "main" will be in the global shared string
3544 table, so it's a small saving to use it rather than allocate another
3546 PL_curstname = newSVpvs_share("main");
3547 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3548 /* If we hadn't caused another reference to "main" to be in the shared
3549 string table above, then it would be worth reordering these two,
3550 because otherwise all we do is delete "main" from it as a consequence
3551 of the SvREFCNT_dec, only to add it again with hv_name_set */
3552 SvREFCNT_dec(GvHV(gv));
3553 hv_name_set(PL_defstash, "main", 4, 0);
3554 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3556 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3558 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3559 GvMULTI_on(PL_incgv);
3560 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3561 GvMULTI_on(PL_hintgv);
3562 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3563 SvREFCNT_inc_simple_void(PL_defgv);
3564 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3565 SvREFCNT_inc_simple_void(PL_errgv);
3566 GvMULTI_on(PL_errgv);
3567 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3568 GvMULTI_on(PL_replgv);
3569 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3570 #ifdef PERL_DONT_CREATE_GVSV
3573 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3574 sv_setpvn(ERRSV, "", 0);
3575 PL_curstash = PL_defstash;
3576 CopSTASH_set(&PL_compiling, PL_defstash);
3577 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3578 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3580 /* We must init $/ before switches are processed. */
3581 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3585 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3586 int *suidscript, PerlIO **rsfpp)
3591 const char *cpp_discard_flag;
3600 PL_origfilename = savepvs("-e");
3603 /* if find_script() returns, it returns a malloc()-ed value */
3604 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3606 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3607 const char *s = scriptname + 8;
3613 * Tell apart "normal" usage of fdscript, e.g.
3614 * with bash on FreeBSD:
3615 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3616 * from usage in suidperl.
3617 * Does any "normal" usage leave garbage after the number???
3618 * Is it a mistake to use a similar /dev/fd/ construct for
3623 * Be supersafe and do some sanity-checks.
3624 * Still, can we be sure we got the right thing?
3627 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3630 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3632 scriptname = savepv(s + 1);
3633 Safefree(PL_origfilename);
3634 PL_origfilename = (char *)scriptname;
3639 CopFILE_free(PL_curcop);
3640 CopFILE_set(PL_curcop, PL_origfilename);
3641 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3642 scriptname = (char *)"";
3643 if (fdscript >= 0) {
3644 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3645 # if defined(HAS_FCNTL) && defined(F_SETFD)
3647 /* ensure close-on-exec */
3648 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3653 Perl_croak(aTHX_ "sperl needs fd script\n"
3654 "You should not call sperl directly; do you need to "
3655 "change a #! line\nfrom sperl to perl?\n");
3658 * Do not open (or do other fancy stuff) while setuid.
3659 * Perl does the open, and hands script to suidperl on a fd;
3660 * suidperl only does some checks, sets up UIDs and re-execs
3661 * perl with that fd as it has always done.
3664 if (*suidscript != 1) {
3665 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3668 else if (PL_preprocess) {
3669 const char * const cpp_cfg = CPPSTDIN;
3670 SV * const cpp = newSVpvs("");
3671 SV * const cmd = newSV(0);
3673 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3674 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3675 if (strEQ(cpp_cfg, "cppstdin"))
3676 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3677 sv_catpv(cpp, cpp_cfg);
3680 sv_catpvs(sv, "-I");
3681 sv_catpv(sv,PRIVLIB_EXP);
3684 DEBUG_P(PerlIO_printf(Perl_debug_log,
3685 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3686 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3689 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3696 cpp_discard_flag = "";
3698 cpp_discard_flag = "-C";
3702 perl = os2_execname(aTHX);
3704 perl = PL_origargv[0];
3708 /* This strips off Perl comments which might interfere with
3709 the C pre-processor, including #!. #line directives are
3710 deliberately stripped to avoid confusion with Perl's version
3711 of #line. FWP played some golf with it so it will fit
3712 into VMS's 255 character buffer.
3715 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3717 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3719 Perl_sv_setpvf(aTHX_ cmd, "\
3720 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3721 perl, quote, code, quote, scriptname, SVfARG(cpp),
3722 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3724 PL_doextract = FALSE;
3726 DEBUG_P(PerlIO_printf(Perl_debug_log,
3727 "PL_preprocess: cmd=\"%s\"\n",
3730 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3734 else if (!*scriptname) {
3735 forbid_setid(0, *suidscript);
3736 *rsfpp = PerlIO_stdin();
3739 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3740 # if defined(HAS_FCNTL) && defined(F_SETFD)
3742 /* ensure close-on-exec */
3743 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3746 #endif /* IAMSUID */
3748 /* PSz 16 Sep 03 Keep neat error message */
3750 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3752 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3753 CopFILE(PL_curcop), Strerror(errno));
3759 * I_SYSSTATVFS HAS_FSTATVFS
3761 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3762 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3763 * here so that metaconfig picks them up. */
3767 S_fd_on_nosuid_fs(pTHX_ int fd)
3770 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3771 * but is needed also on machines without setreuid.
3772 * Seems safe enough to run as root.
3774 int check_okay = 0; /* able to do all the required sys/libcalls */
3775 int on_nosuid = 0; /* the fd is on a nosuid fs */
3777 * Need to check noexec also: nosuid might not be set, the average
3778 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3780 int on_noexec = 0; /* the fd is on a noexec fs */
3783 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3784 * fstatvfs() is UNIX98.
3785 * fstatfs() is 4.3 BSD.
3786 * ustat()+getmnt() is pre-4.3 BSD.
3787 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3788 * an irrelevant filesystem while trying to reach the right one.
3791 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3793 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3794 defined(HAS_FSTATVFS)
3795 # define FD_ON_NOSUID_CHECK_OKAY
3796 struct statvfs stfs;
3798 check_okay = fstatvfs(fd, &stfs) == 0;
3799 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3801 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3802 on platforms where it is present. */
3803 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3805 # endif /* fstatvfs */
3807 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3808 defined(PERL_MOUNT_NOSUID) && \
3809 defined(PERL_MOUNT_NOEXEC) && \
3810 defined(HAS_FSTATFS) && \
3811 defined(HAS_STRUCT_STATFS) && \
3812 defined(HAS_STRUCT_STATFS_F_FLAGS)
3813 # define FD_ON_NOSUID_CHECK_OKAY
3816 check_okay = fstatfs(fd, &stfs) == 0;
3817 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3818 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3819 # endif /* fstatfs */
3821 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3822 defined(PERL_MOUNT_NOSUID) && \
3823 defined(PERL_MOUNT_NOEXEC) && \
3824 defined(HAS_FSTAT) && \
3825 defined(HAS_USTAT) && \
3826 defined(HAS_GETMNT) && \
3827 defined(HAS_STRUCT_FS_DATA) && \
3829 # define FD_ON_NOSUID_CHECK_OKAY
3832 if (fstat(fd, &fdst) == 0) {
3834 if (ustat(fdst.st_dev, &us) == 0) {
3836 /* NOSTAT_ONE here because we're not examining fields which
3837 * vary between that case and STAT_ONE. */
3838 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3839 size_t cmplen = sizeof(us.f_fname);
3840 if (sizeof(fsd.fd_req.path) < cmplen)
3841 cmplen = sizeof(fsd.fd_req.path);
3842 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3843 fdst.st_dev == fsd.fd_req.dev) {
3845 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3846 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3851 # endif /* fstat+ustat+getmnt */
3853 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3854 defined(HAS_GETMNTENT) && \
3855 defined(HAS_HASMNTOPT) && \
3856 defined(MNTOPT_NOSUID) && \
3857 defined(MNTOPT_NOEXEC)
3858 # define FD_ON_NOSUID_CHECK_OKAY
3859 FILE *mtab = fopen("/etc/mtab", "r");
3860 struct mntent *entry;
3863 if (mtab && (fstat(fd, &stb) == 0)) {
3864 while (entry = getmntent(mtab)) {
3865 if (stat(entry->mnt_dir, &fsb) == 0
3866 && fsb.st_dev == stb.st_dev)
3868 /* found the filesystem */
3870 if (hasmntopt(entry, MNTOPT_NOSUID))
3872 if (hasmntopt(entry, MNTOPT_NOEXEC))
3875 } /* A single fs may well fail its stat(). */
3880 # endif /* getmntent+hasmntopt */
3883 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3885 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3887 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3888 return ((!check_okay) || on_nosuid || on_noexec);
3890 #endif /* IAMSUID */
3893 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3894 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3899 #endif /* IAMSUID */
3901 /* do we need to emulate setuid on scripts? */
3903 /* This code is for those BSD systems that have setuid #! scripts disabled
3904 * in the kernel because of a security problem. Merely defining DOSUID
3905 * in perl will not fix that problem, but if you have disabled setuid
3906 * scripts in the kernel, this will attempt to emulate setuid and setgid
3907 * on scripts that have those now-otherwise-useless bits set. The setuid
3908 * root version must be called suidperl or sperlN.NNN. If regular perl
3909 * discovers that it has opened a setuid script, it calls suidperl with
3910 * the same argv that it had. If suidperl finds that the script it has
3911 * just opened is NOT setuid root, it sets the effective uid back to the
3912 * uid. We don't just make perl setuid root because that loses the
3913 * effective uid we had before invoking perl, if it was different from the
3916 * Description/comments above do not match current workings:
3917 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3918 * suidperl called with script open and name changed to /dev/fd/N/X;
3919 * suidperl croaks if script is not setuid;
3920 * making perl setuid would be a huge security risk (and yes, that
3921 * would lose any euid we might have had).
3923 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3924 * be defined in suidperl only. suidperl must be setuid root. The
3925 * Configure script will set this up for you if you want it.
3931 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3932 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3933 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3935 const char *linestr;
3939 if (fdscript < 0 || suidscript != 1)
3940 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3942 * Since the script is opened by perl, not suidperl, some of these
3943 * checks are superfluous. Leaving them in probably does not lower
3947 * Do checks even for systems with no HAS_SETREUID.
3948 * We used to swap, then re-swap UIDs with
3950 if (setreuid(PL_euid,PL_uid) < 0
3951 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3952 Perl_croak(aTHX_ "Can't swap uid and euid");
3955 if (setreuid(PL_uid,PL_euid) < 0
3956 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3957 Perl_croak(aTHX_ "Can't reswap uid and euid");
3961 /* On this access check to make sure the directories are readable,
3962 * there is actually a small window that the user could use to make
3963 * filename point to an accessible directory. So there is a faint
3964 * chance that someone could execute a setuid script down in a
3965 * non-accessible directory. I don't know what to do about that.
3966 * But I don't think it's too important. The manual lies when
3967 * it says access() is useful in setuid programs.
3969 * So, access() is pretty useless... but not harmful... do anyway.
3971 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3972 Perl_croak(aTHX_ "Can't access() script\n");
3975 /* If we can swap euid and uid, then we can determine access rights
3976 * with a simple stat of the file, and then compare device and
3977 * inode to make sure we did stat() on the same file we opened.
3978 * Then we just have to make sure he or she can execute it.
3981 * As the script is opened by perl, not suidperl, we do not need to
3982 * care much about access rights.
3984 * The 'script changed' check is needed, or we can get lied to
3985 * about $0 with e.g.
3986 * suidperl /dev/fd/4//bin/x 4<setuidscript
3987 * Without HAS_SETREUID, is it safe to stat() as root?
3989 * Are there any operating systems that pass /dev/fd/xxx for setuid
3990 * scripts, as suggested/described in perlsec(1)? Surely they do not
3991 * pass the script name as we do, so the "script changed" test would
3992 * fail for them... but we never get here with
3993 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3995 * This is one place where we must "lie" about return status: not
3996 * say if the stat() failed. We are doing this as root, and could
3997 * be tricked into reporting existence or not of files that the
3998 * "plain" user cannot even see.
4002 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4003 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4004 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4005 Perl_croak(aTHX_ "Setuid script changed\n");
4009 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4010 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4013 * We used to do this check as the "plain" user (after swapping
4014 * UIDs). But the check for nosuid and noexec filesystem is needed,
4015 * and should be done even without HAS_SETREUID. (Maybe those
4016 * operating systems do not have such mount options anyway...)
4017 * Seems safe enough to do as root.
4019 #if !defined(NO_NOSUID_CHECK)
4020 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
4021 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4024 #endif /* IAMSUID */
4026 if (!S_ISREG(PL_statbuf.st_mode)) {
4027 Perl_croak(aTHX_ "Setuid script not plain file\n");
4029 if (PL_statbuf.st_mode & S_IWOTH)
4030 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4031 PL_doswitches = FALSE; /* -s is insecure in suid */
4032 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4033 CopLINE_inc(PL_curcop);
4034 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4035 Perl_croak(aTHX_ "No #! line");
4036 linestr = SvPV_nolen_const(linestr_sv);
4037 /* required even on Sys V */
4038 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4039 Perl_croak(aTHX_ "No #! line");
4043 /* Sanity check on line length */
4044 s_end = s + strlen(s);
4045 if (s_end == s || (s_end - s) > 4000)
4046 Perl_croak(aTHX_ "Very long #! line");
4047 /* Allow more than a single space after #! */
4048 while (isSPACE(*s)) s++;
4049 /* Sanity check on buffer end */
4050 while ((*s) && !isSPACE(*s)) s++;
4051 for (s2 = s; (s2 > linestr &&
4052 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4053 || s2[-1] == '-')); s2--) ;
4054 /* Sanity check on buffer start */
4055 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4056 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4057 Perl_croak(aTHX_ "Not a perl script");
4058 while (*s == ' ' || *s == '\t') s++;
4060 * #! arg must be what we saw above. They can invoke it by
4061 * mentioning suidperl explicitly, but they may not add any strange
4062 * arguments beyond what #! says if they do invoke suidperl that way.
4065 * The way validarg was set up, we rely on the kernel to start
4066 * scripts with argv[1] set to contain all #! line switches (the
4070 * Check that we got all the arguments listed in the #! line (not
4071 * just that there are no extraneous arguments). Might not matter
4072 * much, as switches from #! line seem to be acted upon (also), and
4073 * so may be checked and trapped in perl. But, security checks must
4074 * be done in suidperl and not deferred to perl. Note that suidperl
4075 * does not get around to parsing (and checking) the switches on
4076 * the #! line (but execs perl sooner).
4077 * Allow (require) a trailing newline (which may be of two
4078 * characters on some architectures?) (but no other trailing
4081 len = strlen(validarg);
4082 if (strEQ(validarg," PHOOEY ") ||
4083 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4084 !((s_end - s) == len+1
4085 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4086 Perl_croak(aTHX_ "Args must match #! line");
4090 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4091 PL_euid == PL_statbuf.st_uid)
4093 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4094 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4095 #endif /* IAMSUID */
4098 PL_euid) { /* oops, we're not the setuid root perl */
4100 * When root runs a setuid script, we do not go through the same
4101 * steps of execing sperl and then perl with fd scripts, but
4102 * simply set up UIDs within the same perl invocation; so do
4103 * not have the same checks (on options, whatever) that we have
4104 * for plain users. No problem really: would have to be a script
4105 * that does not actually work for plain users; and if root is
4106 * foolish and can be persuaded to run such an unsafe script, he
4107 * might run also non-setuid ones, and deserves what he gets.
4109 * Or, we might drop the PL_euid check above (and rely just on
4110 * fdscript to avoid loops), and do the execs
4116 * Pass fd script to suidperl.
4117 * Exec suidperl, substituting fd script for scriptname.
4118 * Pass script name as "subdir" of fd, which perl will grok;
4119 * in fact will use that to distinguish this from "normal"
4120 * usage, see comments above.
4122 PerlIO_rewind(rsfp);
4123 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4124 /* PSz 27 Feb 04 Sanity checks on scriptname */
4125 if ((!scriptname) || (!*scriptname) ) {
4126 Perl_croak(aTHX_ "No setuid script name\n");
4128 if (*scriptname == '-') {
4129 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4130 /* Or we might confuse it with an option when replacing
4131 * name in argument list, below (though we do pointer, not
4132 * string, comparisons).
4135 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4136 if (!PL_origargv[which]) {
4137 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4139 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4140 PerlIO_fileno(rsfp), PL_origargv[which]));
4141 #if defined(HAS_FCNTL) && defined(F_SETFD)
4142 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4145 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4146 (int)PERL_REVISION, (int)PERL_VERSION,
4147 (int)PERL_SUBVERSION), PL_origargv);
4149 #endif /* IAMSUID */
4150 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4153 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4155 * This seems back to front: we try HAS_SETEGID first; if not available
4156 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4157 * in the sense that we only want to set EGID; but are there any machines
4158 * with either of the latter, but not the former? Same with UID, later.
4161 (void)setegid(PL_statbuf.st_gid);
4164 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4166 #ifdef HAS_SETRESGID
4167 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4169 PerlProc_setgid(PL_statbuf.st_gid);
4173 if (PerlProc_getegid() != PL_statbuf.st_gid)
4174 Perl_croak(aTHX_ "Can't do setegid!\n");
4176 if (PL_statbuf.st_mode & S_ISUID) {
4177 if (PL_statbuf.st_uid != PL_euid)
4179 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4182 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4184 #ifdef HAS_SETRESUID
4185 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4187 PerlProc_setuid(PL_statbuf.st_uid);
4191 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4192 Perl_croak(aTHX_ "Can't do seteuid!\n");
4194 else if (PL_uid) { /* oops, mustn't run as root */
4196 (void)seteuid((Uid_t)PL_uid);
4199 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4201 #ifdef HAS_SETRESUID
4202 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4204 PerlProc_setuid((Uid_t)PL_uid);
4208 if (PerlProc_geteuid() != PL_uid)
4209 Perl_croak(aTHX_ "Can't do seteuid!\n");
4212 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4213 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4216 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4217 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4218 else if (fdscript < 0 || suidscript != 1)
4219 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4220 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4222 /* PSz 16 Sep 03 Keep neat error message */
4223 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4226 /* We absolutely must clear out any saved ids here, so we */
4227 /* exec the real perl, substituting fd script for scriptname. */
4228 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4230 * It might be thought that using setresgid and/or setresuid (changed to
4231 * set the saved IDs) above might obviate the need to exec, and we could
4232 * go on to "do the perl thing".
4234 * Is there such a thing as "saved GID", and is that set for setuid (but
4235 * not setgid) execution like suidperl? Without exec, it would not be
4236 * cleared for setuid (but not setgid) scripts (or might need a dummy
4239 * We need suidperl to do the exact same argument checking that perl
4240 * does. Thus it cannot be very small; while it could be significantly
4241 * smaller, it is safer (simpler?) to make it essentially the same
4242 * binary as perl (but they are not identical). - Maybe could defer that
4243 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4244 * but prefer to do thorough checks in suidperl itself. Such deferral
4245 * would make suidperl security rely on perl, a design no-no.
4247 * Setuid things should be short and simple, thus easy to understand and
4248 * verify. They should do their "own thing", without influence by
4249 * attackers. It may help if their internal execution flow is fixed,
4250 * regardless of platform: it may be best to exec anyway.
4252 * Suidperl should at least be conceptually simple: a wrapper only,
4253 * never to do any real perl. Maybe we should put
4255 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4257 * into the perly bits.
4259 PerlIO_rewind(rsfp);
4260 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4262 * Keep original arguments: suidperl already has fd script.
4264 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4265 /* if (!PL_origargv[which]) { */
4266 /* errno = EPERM; */
4267 /* Perl_croak(aTHX_ "Permission denied\n"); */
4269 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4270 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4271 #if defined(HAS_FCNTL) && defined(F_SETFD)
4272 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4275 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4276 (int)PERL_REVISION, (int)PERL_VERSION,
4277 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4279 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4280 #endif /* IAMSUID */
4282 PERL_UNUSED_ARG(fdscript);
4283 PERL_UNUSED_ARG(suidscript);
4284 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4285 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4286 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4287 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4289 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4292 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4293 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4294 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4295 /* not set-id, must be wrapped */
4298 PERL_UNUSED_ARG(validarg);
4299 PERL_UNUSED_ARG(scriptname);
4300 PERL_UNUSED_ARG(linestr_sv);
4304 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4308 register const char *s2;
4309 #ifdef MACOS_TRADITIONAL
4313 /* skip forward in input to the real script? */
4315 #ifdef MACOS_TRADITIONAL
4316 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4318 while (PL_doextract || gMacPerl_AlwaysExtract) {
4319 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4320 if (!gMacPerl_AlwaysExtract)
4321 Perl_croak(aTHX_ "No Perl script found in input\n");
4323 if (PL_doextract) /* require explicit override ? */
4324 if (!OverrideExtract(PL_origfilename))
4325 Perl_croak(aTHX_ "User aborted script\n");
4327 PL_doextract = FALSE;
4329 /* Pater peccavi, file does not have #! */
4330 PerlIO_rewind(rsfp);
4335 while (PL_doextract) {
4336 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4337 Perl_croak(aTHX_ "No Perl script found in input\n");
4340 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4341 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4342 PL_doextract = FALSE;
4343 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4345 while (*s == ' ' || *s == '\t') s++;
4347 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4348 || s2[-1] == '_') s2--;
4349 if (strnEQ(s2-4,"perl",4))
4350 while ((s = moreswitches(s)))
4353 #ifdef MACOS_TRADITIONAL
4354 /* We are always searching for the #!perl line in MacPerl,
4355 * so if we find it, still keep the line count correct
4356 * by counting lines we already skipped over
4358 for (; maclines > 0 ; maclines--)
4359 PerlIO_ungetc(rsfp, '\n');
4363 /* gMacPerl_AlwaysExtract is false in MPW tool */
4364 } else if (gMacPerl_AlwaysExtract) {
4376 PL_uid = PerlProc_getuid();
4377 PL_euid = PerlProc_geteuid();
4378 PL_gid = PerlProc_getgid();
4379 PL_egid = PerlProc_getegid();
4381 PL_uid |= PL_gid << 16;
4382 PL_euid |= PL_egid << 16;
4384 /* Should not happen: */
4385 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4386 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4389 * Should go by suidscript, not uid!=euid: why disallow
4390 * system("ls") in scripts run from setuid things?
4391 * Or, is this run before we check arguments and set suidscript?
4392 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4393 * (We never have suidscript, can we be sure to have fdscript?)
4394 * Or must then go by UID checks? See comments in forbid_setid also.
4398 /* This is used very early in the lifetime of the program,
4399 * before even the options are parsed, so PL_tainting has
4400 * not been initialized properly. */
4402 Perl_doing_taint(int argc, char *argv[], char *envp[])
4404 #ifndef PERL_IMPLICIT_SYS
4405 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4406 * before we have an interpreter-- and the whole point of this
4407 * function is to be called at such an early stage. If you are on
4408 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4409 * "tainted because running with altered effective ids', you'll
4410 * have to add your own checks somewhere in here. The two most
4411 * known samples of 'implicitness' are Win32 and NetWare, neither
4412 * of which has much of concept of 'uids'. */
4413 int uid = PerlProc_getuid();
4414 int euid = PerlProc_geteuid();
4415 int gid = PerlProc_getgid();
4416 int egid = PerlProc_getegid();
4423 if (uid && (euid != uid || egid != gid))
4425 #endif /* !PERL_IMPLICIT_SYS */
4426 /* This is a really primitive check; environment gets ignored only
4427 * if -T are the first chars together; otherwise one gets
4428 * "Too late" message. */
4429 if ( argc > 1 && argv[1][0] == '-'
4430 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4435 /* Passing the flag as a single char rather than a string is a slight space
4436 optimisation. The only message that isn't /^-.$/ is
4437 "program input from stdin", which is substituted in place of '\0', which
4438 could never be a command line flag. */
4440 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4443 char string[3] = "-x";
4444 const char *message = "program input from stdin";
4451 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4452 if (PL_euid != PL_uid)
4453 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4454 if (PL_egid != PL_gid)
4455 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4456 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4458 * Checks for UID/GID above "wrong": why disallow
4459 * perl -e 'print "Hello\n"'
4460 * from within setuid things?? Simply drop them: replaced by
4461 * fdscript/suidscript and #ifdef IAMSUID checks below.
4463 * This may be too late for command-line switches. Will catch those on
4464 * the #! line, after finding the script name and setting up
4465 * fdscript/suidscript. Note that suidperl does not get around to
4466 * parsing (and checking) the switches on the #! line, but checks that
4467 * the two sets are identical.
4469 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4470 * instead, or would that be "too late"? (We never have suidscript, can
4471 * we be sure to have fdscript?)
4473 * Catch things with suidscript (in descendant of suidperl), even with
4474 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4475 * below; but I am paranoid.
4477 * Also see comments about root running a setuid script, elsewhere.
4479 if (suidscript >= 0)
4480 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4482 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4483 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4484 #endif /* IAMSUID */
4488 Perl_init_debugger(pTHX)
4491 HV * const ostash = PL_curstash;
4493 PL_curstash = PL_debstash;
4494 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4496 AvREAL_off(PL_dbargs);
4497 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4498 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4499 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4500 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4501 sv_setiv(PL_DBsingle, 0);
4502 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4503 sv_setiv(PL_DBtrace, 0);
4504 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4505 sv_setiv(PL_DBsignal, 0);
4506 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4507 sv_setiv(PL_DBassertion, 0);
4508 PL_curstash = ostash;
4511 #ifndef STRESS_REALLOC
4512 #define REASONABLE(size) (size)
4514 #define REASONABLE(size) (1) /* unreasonable */
4518 Perl_init_stacks(pTHX)
4521 /* start with 128-item stack and 8K cxstack */
4522 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4523 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4524 PL_curstackinfo->si_type = PERLSI_MAIN;
4525 PL_curstack = PL_curstackinfo->si_stack;
4526 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4528 PL_stack_base = AvARRAY(PL_curstack);
4529 PL_stack_sp = PL_stack_base;
4530 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4532 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4535 PL_tmps_max = REASONABLE(128);
4537 Newx(PL_markstack,REASONABLE(32),I32);
4538 PL_markstack_ptr = PL_markstack;
4539 PL_markstack_max = PL_markstack + REASONABLE(32);
4543 Newx(PL_scopestack,REASONABLE(32),I32);
4544 PL_scopestack_ix = 0;
4545 PL_scopestack_max = REASONABLE(32);
4547 Newx(PL_savestack,REASONABLE(128),ANY);
4548 PL_savestack_ix = 0;
4549 PL_savestack_max = REASONABLE(128);
4558 while (PL_curstackinfo->si_next)
4559 PL_curstackinfo = PL_curstackinfo->si_next;
4560 while (PL_curstackinfo) {
4561 PERL_SI *p = PL_curstackinfo->si_prev;
4562 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4563 Safefree(PL_curstackinfo->si_cxstack);
4564 Safefree(PL_curstackinfo);
4565 PL_curstackinfo = p;
4567 Safefree(PL_tmps_stack);
4568 Safefree(PL_markstack);
4569 Safefree(PL_scopestack);
4570 Safefree(PL_savestack);
4575 S_init_predump_symbols(pTHX)
4581 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4582 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4583 GvMULTI_on(PL_stdingv);
4584 io = GvIOp(PL_stdingv);
4585 IoTYPE(io) = IoTYPE_RDONLY;
4586 IoIFP(io) = PerlIO_stdin();
4587 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4589 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4591 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4594 IoTYPE(io) = IoTYPE_WRONLY;
4595 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4597 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4599 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4601 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4602 GvMULTI_on(PL_stderrgv);
4603 io = GvIOp(PL_stderrgv);
4604 IoTYPE(io) = IoTYPE_WRONLY;
4605 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4606 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4608 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4610 PL_statname = newSV(0); /* last filename we did stat on */
4612 Safefree(PL_osname);
4613 PL_osname = savepv(OSNAME);
4617 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4620 argc--,argv++; /* skip name of script */
4621 if (PL_doswitches) {
4622 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4626 if (argv[0][1] == '-' && !argv[0][2]) {
4630 if ((s = strchr(argv[0], '='))) {
4631 const char *const start_name = argv[0] + 1;
4632 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4633 TRUE, SVt_PV)), s + 1);
4636 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4639 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4640 GvMULTI_on(PL_argvgv);
4641 (void)gv_AVadd(PL_argvgv);
4642 av_clear(GvAVn(PL_argvgv));
4643 for (; argc > 0; argc--,argv++) {
4644 SV * const sv = newSVpv(argv[0],0);
4645 av_push(GvAVn(PL_argvgv),sv);
4646 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4647 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4650 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4651 (void)sv_utf8_decode(sv);
4657 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4662 PL_toptarget = newSV_type(SVt_PVFM);
4663 sv_setpvn(PL_toptarget, "", 0);
4664 PL_bodytarget = newSV_type(SVt_PVFM);
4665 sv_setpvn(PL_bodytarget, "", 0);
4666 PL_formtarget = PL_bodytarget;
4670 init_argv_symbols(argc,argv);
4672 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4673 #ifdef MACOS_TRADITIONAL
4674 /* $0 is not majick on a Mac */
4675 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4677 sv_setpv(GvSV(tmpgv),PL_origfilename);
4678 magicname("0", "0", 1);
4681 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4683 bool env_is_not_environ;
4684 GvMULTI_on(PL_envgv);
4685 hv = GvHVn(PL_envgv);
4686 hv_magic(hv, NULL, PERL_MAGIC_env);
4688 #ifdef USE_ENVIRON_ARRAY
4689 /* Note that if the supplied env parameter is actually a copy
4690 of the global environ then it may now point to free'd memory
4691 if the environment has been modified since. To avoid this
4692 problem we treat env==NULL as meaning 'use the default'
4696 env_is_not_environ = env != environ;
4697 if (env_is_not_environ
4698 # ifdef USE_ITHREADS
4699 && PL_curinterp == aTHX
4708 for (; *env; env++) {
4709 if (!(s = strchr(*env,'=')) || s == *env)
4711 #if defined(MSDOS) && !defined(DJGPP)
4716 sv = newSVpv(s+1, 0);
4717 (void)hv_store(hv, *env, s - *env, sv, 0);
4718 if (env_is_not_environ)
4722 #endif /* USE_ENVIRON_ARRAY */
4723 #endif /* !PERL_MICRO */
4726 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4727 SvREADONLY_off(GvSV(tmpgv));
4728 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4729 SvREADONLY_on(GvSV(tmpgv));
4731 #ifdef THREADS_HAVE_PIDS
4732 PL_ppid = (IV)getppid();
4735 /* touch @F array to prevent spurious warnings 20020415 MJD */
4737 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4742 S_init_perllib(pTHX)
4748 s = PerlEnv_getenv("PERL5LIB");
4750 * It isn't possible to delete an environment variable with
4751 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4752 * case we treat PERL5LIB as undefined if it has a zero-length value.
4754 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4755 if (s && *s != '\0')
4759 incpush(s, TRUE, TRUE, TRUE, FALSE);
4761 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4763 /* Treat PERL5?LIB as a possible search list logical name -- the
4764 * "natural" VMS idiom for a Unix path string. We allow each
4765 * element to be a set of |-separated directories for compatibility.
4769 if (my_trnlnm("PERL5LIB",buf,0))
4770 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4772 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4776 /* Use the ~-expanded versions of APPLLIB (undocumented),
4777 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4780 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4784 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4786 #ifdef MACOS_TRADITIONAL
4789 SV * privdir = newSV(0);
4790 char * macperl = PerlEnv_getenv("MACPERL");
4795 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4796 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4797 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4798 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4799 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4800 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4802 SvREFCNT_dec(privdir);
4805 incpush(":", FALSE, FALSE, TRUE, FALSE);
4808 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4811 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4813 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4817 /* sitearch is always relative to sitelib on Windows for
4818 * DLL-based path intuition to work correctly */
4819 # if !defined(WIN32)
4820 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4826 /* this picks up sitearch as well */
4827 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4829 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4833 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4834 /* Search for version-specific dirs below here */
4835 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4838 #ifdef PERL_VENDORARCH_EXP
4839 /* vendorarch is always relative to vendorlib on Windows for
4840 * DLL-based path intuition to work correctly */
4841 # if !defined(WIN32)
4842 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4846 #ifdef PERL_VENDORLIB_EXP
4848 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4850 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4854 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4855 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4858 #ifdef PERL_OTHERLIBDIRS
4859 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4863 incpush(".", FALSE, FALSE, TRUE, FALSE);
4864 #endif /* MACOS_TRADITIONAL */
4867 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4868 # define PERLLIB_SEP ';'
4871 # define PERLLIB_SEP '|'
4873 # if defined(MACOS_TRADITIONAL)
4874 # define PERLLIB_SEP ','
4876 # define PERLLIB_SEP ':'
4880 #ifndef PERLLIB_MANGLE
4881 # define PERLLIB_MANGLE(s,n) (s)
4884 /* Push a directory onto @INC if it exists.
4885 Generate a new SV if we do this, to save needing to copy the SV we push
4888 S_incpush_if_exists(pTHX_ SV *dir)
4892 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4893 S_ISDIR(tmpstatbuf.st_mode)) {
4894 av_push(GvAVn(PL_incgv), dir);
4901 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4906 const char *p = dir;
4911 if (addsubdirs || addoldvers) {
4915 /* Break at all separators */
4917 SV *libdir = newSV(0);
4920 /* skip any consecutive separators */
4922 while ( *p == PERLLIB_SEP ) {
4923 /* Uncomment the next line for PATH semantics */
4924 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4929 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4930 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4935 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4936 p = NULL; /* break out */
4938 #ifdef MACOS_TRADITIONAL
4939 if (!strchr(SvPVX(libdir), ':')) {
4942 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4944 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4945 sv_catpvs(libdir, ":");
4948 /* Do the if() outside the #ifdef to avoid warnings about an unused
4951 #ifdef PERL_RELOCATABLE_INC
4953 * Relocatable include entries are marked with a leading .../
4956 * 0: Remove that leading ".../"
4957 * 1: Remove trailing executable name (anything after the last '/')
4958 * from the perl path to give a perl prefix
4960 * While the @INC element starts "../" and the prefix ends with a real
4961 * directory (ie not . or ..) chop that real directory off the prefix
4962 * and the leading "../" from the @INC element. ie a logical "../"
4964 * Finally concatenate the prefix and the remainder of the @INC element
4965 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4966 * generates /usr/local/lib/perl5
4968 const char *libpath = SvPVX(libdir);
4969 STRLEN libpath_len = SvCUR(libdir);
4970 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4972 SV * const caret_X = get_sv("\030", 0);
4973 /* Going to use the SV just as a scratch buffer holding a C
4979 /* $^X is *the* source of taint if tainting is on, hence
4980 SvPOK() won't be true. */
4982 assert(SvPOKp(caret_X));
4983 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4984 /* Firstly take off the leading .../
4985 If all else fail we'll do the paths relative to the current
4987 sv_chop(libdir, libpath + 4);
4988 /* Don't use SvPV as we're intentionally bypassing taining,
4989 mortal copies that the mg_get of tainting creates, and
4990 corruption that seems to come via the save stack.
4991 I guess that the save stack isn't correctly set up yet. */
4992 libpath = SvPVX(libdir);
4993 libpath_len = SvCUR(libdir);
4995 /* This would work more efficiently with memrchr, but as it's
4996 only a GNU extension we'd need to probe for it and
4997 implement our own. Not hard, but maybe not worth it? */
4999 prefix = SvPVX(prefix_sv);
5000 lastslash = strrchr(prefix, '/');
5002 /* First time in with the *lastslash = '\0' we just wipe off
5003 the trailing /perl from (say) /usr/foo/bin/perl
5007 while ((*lastslash = '\0'), /* Do that, come what may. */
5008 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5009 && (lastslash = strrchr(prefix, '/')))) {
5010 if (lastslash[1] == '\0'
5011 || (lastslash[1] == '.'
5012 && (lastslash[2] == '/' /* ends "/." */
5013 || (lastslash[2] == '/'
5014 && lastslash[3] == '/' /* or "/.." */
5016 /* Prefix ends "/" or "/." or "/..", any of which
5017 are fishy, so don't do any more logical cleanup.
5021 /* Remove leading "../" from path */
5024 /* Next iteration round the loop removes the last
5025 directory name from prefix by writing a '\0' in
5026 the while clause. */
5028 /* prefix has been terminated with a '\0' to the correct
5029 length. libpath points somewhere into the libdir SV.
5030 We need to join the 2 with '/' and drop the result into
5032 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5033 SvREFCNT_dec(libdir);
5034 /* And this is the new libdir. */
5037 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5038 /* Need to taint reloccated paths if running set ID */
5039 SvTAINTED_on(libdir);
5042 SvREFCNT_dec(prefix_sv);
5047 * BEFORE pushing libdir onto @INC we may first push version- and
5048 * archname-specific sub-directories.
5050 if (addsubdirs || addoldvers) {
5051 #ifdef PERL_INC_VERSION_LIST
5052 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5053 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5054 const char * const *incver;
5060 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5062 while (unix[len-1] == '/') len--; /* Cosmetic */
5063 sv_usepvn(libdir,unix,len);
5066 PerlIO_printf(Perl_error_log,
5067 "Failed to unixify @INC element \"%s\"\n",
5071 #ifdef MACOS_TRADITIONAL
5072 #define PERL_AV_SUFFIX_FMT ""
5073 #define PERL_ARCH_FMT "%s:"
5074 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5076 #define PERL_AV_SUFFIX_FMT "/"
5077 #define PERL_ARCH_FMT "/%s"
5078 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5080 /* .../version/archname if -d .../version/archname */
5081 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5083 (int)PERL_REVISION, (int)PERL_VERSION,
5084 (int)PERL_SUBVERSION, ARCHNAME);
5085 subdir = S_incpush_if_exists(aTHX_ subdir);
5087 /* .../version if -d .../version */
5088 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5090 (int)PERL_REVISION, (int)PERL_VERSION,
5091 (int)PERL_SUBVERSION);
5092 subdir = S_incpush_if_exists(aTHX_ subdir);
5094 /* .../archname if -d .../archname */
5095 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5096 SVfARG(libdir), ARCHNAME);
5097 subdir = S_incpush_if_exists(aTHX_ subdir);
5101 #ifdef PERL_INC_VERSION_LIST
5103 for (incver = incverlist; *incver; incver++) {
5104 /* .../xxx if -d .../xxx */
5105 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5106 SVfARG(libdir), *incver);
5107 subdir = S_incpush_if_exists(aTHX_ subdir);
5113 /* finally push this lib directory on the end of @INC */
5114 av_push(GvAVn(PL_incgv), libdir);
5117 assert (SvREFCNT(subdir) == 1);
5118 SvREFCNT_dec(subdir);
5124 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5128 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5134 while (av_len(paramList) >= 0) {
5135 cv = (CV*)av_shift(paramList);
5137 if (paramList == PL_beginav) {
5138 /* save PL_beginav for compiler */
5139 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5141 else if (paramList == PL_checkav) {
5142 /* save PL_checkav for compiler */
5143 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5145 else if (paramList == PL_unitcheckav) {
5146 /* save PL_unitcheckav for compiler */
5147 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5158 PL_madskills |= 16384;
5163 PL_madskills &= ~16384;
5166 (void)SvPV_const(atsv, len);
5168 PL_curcop = &PL_compiling;
5169 CopLINE_set(PL_curcop, oldline);
5170 if (paramList == PL_beginav)
5171 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5173 Perl_sv_catpvf(aTHX_ atsv,
5174 "%s failed--call queue aborted",
5175 paramList == PL_checkav ? "CHECK"
5176 : paramList == PL_initav ? "INIT"
5177 : paramList == PL_unitcheckav ? "UNITCHECK"
5179 while (PL_scopestack_ix > oldscope)
5182 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5189 /* my_exit() was called */
5190 while (PL_scopestack_ix > oldscope)
5193 PL_curstash = PL_defstash;
5194 PL_curcop = &PL_compiling;
5195 CopLINE_set(PL_curcop, oldline);
5197 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5198 if (paramList == PL_beginav)
5199 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5201 Perl_croak(aTHX_ "%s failed--call queue aborted",
5202 paramList == PL_checkav ? "CHECK"
5203 : paramList == PL_initav ? "INIT"
5204 : paramList == PL_unitcheckav ? "UNITCHECK"
5211 PL_curcop = &PL_compiling;
5212 CopLINE_set(PL_curcop, oldline);
5215 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5224 Perl_my_exit(pTHX_ U32 status)
5227 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5228 (void*)thr, (unsigned long) status));
5237 STATUS_EXIT_SET(status);
5244 Perl_my_failure_exit(pTHX)
5248 /* We have been called to fall on our sword. The desired exit code
5249 * should be already set in STATUS_UNIX, but could be shifted over
5250 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5253 * If an error code has not been set, then force the issue.
5255 if (MY_POSIX_EXIT) {
5257 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5258 * the exit code when there isn't an error.
5261 if (STATUS_UNIX == 0)
5262 STATUS_UNIX_EXIT_SET(255);
5264 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5266 /* The exit code could have been set by $? or vmsish which
5267 * means that it may not be fatal. So convert
5268 * success/warning codes to fatal.
5270 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5271 STATUS_UNIX_EXIT_SET(255);
5275 /* Traditionally Perl on VMS always expects a Fatal Error. */
5276 if (vaxc$errno & 1) {
5278 /* So force success status to failure */
5279 if (STATUS_NATIVE & 1)
5284 STATUS_UNIX = EINTR; /* In case something cares */
5289 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5291 /* Encode the severity code */
5292 severity = STATUS_NATIVE & STS$M_SEVERITY;
5293 STATUS_UNIX = (severity ? severity : 1) << 8;
5295 /* Perl expects this to be a fatal error */
5296 if (severity != STS$K_SEVERE)
5305 STATUS_UNIX_SET(errno);
5307 exitstatus = STATUS_UNIX >> 8;
5308 if (exitstatus & 255)
5309 STATUS_UNIX_SET(exitstatus);
5311 STATUS_UNIX_SET(255);
5318 S_my_exit_jump(pTHX)
5323 SvREFCNT_dec(PL_e_script);
5327 POPSTACK_TO(PL_mainstack);
5335 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5338 const char * const p = SvPVX_const(PL_e_script);
5339 const char *nl = strchr(p, '\n');
5341 PERL_UNUSED_ARG(idx);
5342 PERL_UNUSED_ARG(maxlen);
5344 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5346 filter_del(read_e_script);
5349 sv_catpvn(buf_sv, p, nl-p);
5350 sv_chop(PL_e_script, nl);
5356 * c-indentation-style: bsd
5358 * indent-tabs-mode: t
5361 * ex: set ts=8 sts=4 sw=4 noet: