3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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
141 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
153 #ifdef PERL_IMPLICIT_CONTEXT
154 MUTEX_INIT(&PL_my_ctx_mutex);
158 PERL_SET_THX(my_perl);
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
171 /* Newx() needs interpreter, so call malloc() instead */
172 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
173 S_init_tls_and_interp(my_perl);
174 Zero(my_perl, 1, PerlInterpreter);
184 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
191 =head1 Embedding Functions
193 =for apidoc perl_alloc
195 Allocates a new Perl interpreter. See L<perlembed>.
203 PerlInterpreter *my_perl;
205 /* Newx() needs interpreter, so call malloc() instead */
206 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
208 S_init_tls_and_interp(my_perl);
209 #ifndef PERL_TRACK_MEMPOOL
210 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
212 Zero(my_perl, 1, PerlInterpreter);
213 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
217 #endif /* PERL_IMPLICIT_SYS */
220 =for apidoc perl_construct
222 Initializes a new Perl interpreter. See L<perlembed>.
228 perl_construct(pTHXx)
234 PL_perl_destruct_level = 1;
236 if (PL_perl_destruct_level > 0)
239 /* Init the real globals (and main thread)? */
241 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
243 PL_linestr = newSV(79);
244 sv_upgrade(PL_linestr,SVt_PVIV);
246 if (!SvREADONLY(&PL_sv_undef)) {
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. */
258 SvREADONLY_on(&PL_sv_no);
259 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
261 sv_setpv(&PL_sv_yes,PL_Yes);
264 SvREADONLY_on(&PL_sv_yes);
265 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
267 SvREADONLY_on(&PL_sv_placeholder);
268 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
271 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
272 #ifdef PERL_USES_PL_PIDSTATUS
273 PL_pidstatus = newHV();
277 PL_rs = newSVpvs("\n");
282 PL_lex_state = LEX_NOTPARSING;
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
304 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
305 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
307 PL_regex_padav = newAV();
308 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
309 PL_regex_pad = AvARRAY(PL_regex_padav);
311 #ifdef USE_REENTRANT_API
312 Perl_reentrant_init(aTHX);
315 /* Note that strtab is a rather special HV. Assumptions are made
316 about not iterating on it, and not adding tie magic to it.
317 It is properly deallocated in perl_destruct() */
320 HvSHAREKEYS_off(PL_strtab); /* mandatory */
321 hv_ksplit(PL_strtab, 512);
323 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
324 _dyld_lookup_and_bind
325 ("__environ", (unsigned long *) &environ_pointer, NULL);
329 # ifdef USE_ENVIRON_ARRAY
330 PL_origenviron = environ;
334 /* Use sysconf(_SC_CLK_TCK) if available, if not
335 * available or if the sysconf() fails, use the HZ.
336 * BeOS has those, but returns the wrong value.
337 * The HZ if not originally defined has been by now
338 * been defined as CLK_TCK, if available. */
339 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
340 PL_clocktick = sysconf(_SC_CLK_TCK);
341 if (PL_clocktick <= 0)
345 PL_stashcache = newHV();
347 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
348 (int)PERL_VERSION, (int)PERL_SUBVERSION);
351 if (!PL_mmap_page_size) {
352 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
354 SETERRNO(0, SS_NORMAL);
356 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
358 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
360 if ((long) PL_mmap_page_size < 0) {
362 SV * const error = ERRSV;
363 (void) SvUPGRADE(error, SVt_PV);
364 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
367 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
371 # ifdef HAS_GETPAGESIZE
372 PL_mmap_page_size = getpagesize();
374 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
375 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
379 if (PL_mmap_page_size <= 0)
380 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
381 (IV) PL_mmap_page_size);
383 #endif /* HAS_MMAP */
385 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
386 PL_timesbase.tms_utime = 0;
387 PL_timesbase.tms_stime = 0;
388 PL_timesbase.tms_cutime = 0;
389 PL_timesbase.tms_cstime = 0;
396 =for apidoc nothreadhook
398 Stub that provides thread hook for perl_destruct when there are
405 Perl_nothreadhook(pTHX)
411 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
413 Perl_dump_sv_child(pTHX_ SV *sv)
416 const int sock = PL_dumper_fd;
417 const int debug_fd = PerlIO_fileno(Perl_debug_log);
418 union control_un control;
421 struct cmsghdr *cmptr;
423 unsigned char buffer[256];
425 if(sock == -1 || debug_fd == -1)
428 PerlIO_flush(Perl_debug_log);
430 /* All these shenanigans are to pass a file descriptor over to our child for
431 it to dump out to. We can't let it hold open the file descriptor when it
432 forks, as the file descriptor it will dump to can turn out to be one end
433 of pipe that some other process will wait on for EOF. (So as it would
434 be open, the wait would be forever. */
436 msg.msg_control = control.control;
437 msg.msg_controllen = sizeof(control.control);
438 /* We're a connected socket so we don't need a destination */
444 cmptr = CMSG_FIRSTHDR(&msg);
445 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
446 cmptr->cmsg_level = SOL_SOCKET;
447 cmptr->cmsg_type = SCM_RIGHTS;
448 *((int *)CMSG_DATA(cmptr)) = 1;
450 vec[0].iov_base = (void*)&sv;
451 vec[0].iov_len = sizeof(sv);
452 got = sendmsg(sock, &msg, 0);
455 perror("Debug leaking scalars parent sendmsg failed");
458 if(got < sizeof(sv)) {
459 perror("Debug leaking scalars parent short sendmsg");
463 /* Return protocol is
465 unsigned char: length of location string (0 for empty)
466 unsigned char*: string (not terminated)
468 vec[0].iov_base = (void*)&returned_errno;
469 vec[0].iov_len = sizeof(returned_errno);
470 vec[1].iov_base = buffer;
473 got = readv(sock, vec, 2);
476 perror("Debug leaking scalars parent read failed");
477 PerlIO_flush(PerlIO_stderr());
480 if(got < sizeof(returned_errno) + 1) {
481 perror("Debug leaking scalars parent short read");
482 PerlIO_flush(PerlIO_stderr());
487 got = read(sock, buffer + 1, *buffer);
489 perror("Debug leaking scalars parent read 2 failed");
490 PerlIO_flush(PerlIO_stderr());
495 perror("Debug leaking scalars parent short read 2");
496 PerlIO_flush(PerlIO_stderr());
501 if (returned_errno || *buffer) {
502 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
503 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
504 returned_errno, strerror(returned_errno));
510 =for apidoc perl_destruct
512 Shuts down a Perl interpreter. See L<perlembed>.
521 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
523 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
529 /* wait for all pseudo-forked children to finish */
530 PERL_WAIT_FOR_CHILDREN;
532 destruct_level = PL_perl_destruct_level;
535 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
537 const int i = atoi(s);
538 if (destruct_level < i)
544 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
550 if (PL_endav && !PL_minus_c)
551 call_list(PL_scopestack_ix, PL_endav);
557 /* Need to flush since END blocks can produce output */
560 if (CALL_FPTR(PL_threadhook)(aTHX)) {
561 /* Threads hook has vetoed further cleanup */
565 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
566 if (destruct_level != 0) {
567 /* Fork here to create a child. Our child's job is to preserve the
568 state of scalars prior to destruction, so that we can instruct it
569 to dump any scalars that we later find have leaked.
570 There's no subtlety in this code - it assumes POSIX, and it doesn't
574 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
575 perror("Debug leaking scalars socketpair failed");
581 perror("Debug leaking scalars fork failed");
585 /* We are the child */
586 const int sock = fd[1];
587 const int debug_fd = PerlIO_fileno(Perl_debug_log);
590 /* Our success message is an integer 0, and a char 0 */
591 static const char success[sizeof(int) + 1];
595 /* We need to close all other file descriptors otherwise we end up
596 with interesting hangs, where the parent closes its end of a
597 pipe, and sits waiting for (another) child to terminate. Only
598 that child never terminates, because it never gets EOF, because
599 we also have the far end of the pipe open. We even need to
600 close the debugging fd, because sometimes it happens to be one
601 end of a pipe, and a process is waiting on the other end for
602 EOF. Normally it would be closed at some point earlier in
603 destruction, but if we happen to cause the pipe to remain open,
604 EOF never occurs, and we get an infinite hang. Hence all the
605 games to pass in a file descriptor if it's actually needed. */
607 f = sysconf(_SC_OPEN_MAX);
609 where = "sysconf failed";
620 union control_un control;
623 struct cmsghdr *cmptr;
627 msg.msg_control = control.control;
628 msg.msg_controllen = sizeof(control.control);
629 /* We're a connected socket so we don't need a source */
633 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
635 vec[0].iov_base = (void*)⌖
636 vec[0].iov_len = sizeof(target);
638 got = recvmsg(sock, &msg, 0);
643 where = "recv failed";
646 if(got < sizeof(target)) {
647 where = "short recv";
651 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
655 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
656 where = "wrong cmsg_len";
659 if(cmptr->cmsg_level != SOL_SOCKET) {
660 where = "wrong cmsg_level";
663 if(cmptr->cmsg_type != SCM_RIGHTS) {
664 where = "wrong cmsg_type";
668 got_fd = *(int*)CMSG_DATA(cmptr);
669 /* For our last little bit of trickery, put the file descriptor
670 back into Perl_debug_log, as if we never actually closed it
672 if(got_fd != debug_fd) {
673 if (dup2(got_fd, debug_fd) == -1) {
680 PerlIO_flush(Perl_debug_log);
682 got = write(sock, &success, sizeof(success));
685 where = "write failed";
688 if(got < sizeof(success)) {
689 where = "short write";
696 int send_errno = errno;
697 unsigned char length = (unsigned char) strlen(where);
698 struct iovec failure[3] = {
699 {(void*)&send_errno, sizeof(send_errno)},
701 {(void*)where, length}
703 int got = writev(sock, failure, 3);
704 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
705 in the parent if we try to read from the socketpair after the
706 child has exited, even if there was data to read.
707 So sleep a bit to give the parent a fighting chance of
710 _exit((got == -1) ? errno : 0);
714 PL_dumper_fd = fd[0];
719 /* We must account for everything. */
721 /* Destroy the main CV and syntax tree */
722 /* Do this now, because destroying ops can cause new SVs to be generated
723 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
724 PL_curcop to point to a valid op from which the filename structure
726 PL_curcop = &PL_compiling;
728 /* ensure comppad/curpad to refer to main's pad */
729 if (CvPADLIST(PL_main_cv)) {
730 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
732 op_free(PL_main_root);
735 PL_main_start = NULL;
736 SvREFCNT_dec(PL_main_cv);
740 /* Tell PerlIO we are about to tear things apart in case
741 we have layers which are using resources that should
745 PerlIO_destruct(aTHX);
747 if (PL_sv_objcount) {
749 * Try to destruct global references. We do this first so that the
750 * destructors and destructees still exist. Some sv's might remain.
751 * Non-referenced objects are on their own.
755 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
756 PL_defoutgv = NULL; /* may have been freed */
759 /* unhook hooks which will soon be, or use, destroyed data */
760 SvREFCNT_dec(PL_warnhook);
762 SvREFCNT_dec(PL_diehook);
765 /* call exit list functions */
766 while (PL_exitlistlen-- > 0)
767 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
769 Safefree(PL_exitlist);
774 if (destruct_level == 0){
776 DEBUG_P(debprofdump());
778 #if defined(PERLIO_LAYERS)
779 /* No more IO - including error messages ! */
780 PerlIO_cleanup(aTHX);
783 /* The exit() function will do everything that needs doing. */
787 /* jettison our possibly duplicated environment */
788 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
789 * so we certainly shouldn't free it here
792 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
793 if (environ != PL_origenviron && !PL_use_safe_putenv
795 /* only main thread can free environ[0] contents */
796 && PL_curinterp == aTHX
802 for (i = 0; environ[i]; i++)
803 safesysfree(environ[i]);
805 /* Must use safesysfree() when working with environ. */
806 safesysfree(environ);
808 environ = PL_origenviron;
811 #endif /* !PERL_MICRO */
813 /* reset so print() ends up where we expect */
817 /* the syntax tree is shared between clones
818 * so op_free(PL_main_root) only ReREFCNT_dec's
819 * REGEXPs in the parent interpreter
820 * we need to manually ReREFCNT_dec for the clones
823 I32 i = AvFILLp(PL_regex_padav) + 1;
824 SV * const * const ary = AvARRAY(PL_regex_padav);
827 SV * const resv = ary[--i];
829 if (SvFLAGS(resv) & SVf_BREAK) {
830 /* this is PL_reg_curpm, already freed
831 * flag is set in regexec.c:S_regtry
833 SvFLAGS(resv) &= ~SVf_BREAK;
835 else if(SvREPADTMP(resv)) {
836 SvREPADTMP_off(resv);
838 else if(SvIOKp(resv)) {
839 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec((SV*) PL_stashcache);
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
855 (void)PerlIO_close(PL_rsfp);
859 /* Filters for program text */
860 SvREFCNT_dec(PL_rsfp_filters);
861 PL_rsfp_filters = NULL;
864 PL_preprocess = FALSE;
870 PL_doswitches = FALSE;
871 PL_dowarn = G_WARN_OFF;
872 PL_doextract = FALSE;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_e_script);
887 /* magical thingies */
889 SvREFCNT_dec(PL_ofs_sv); /* $, */
892 SvREFCNT_dec(PL_ors_sv); /* $\ */
895 SvREFCNT_dec(PL_rs); /* $/ */
898 PL_multiline = 0; /* $* */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
908 /* clean up after study() */
909 SvREFCNT_dec(PL_lastscream);
910 PL_lastscream = NULL;
911 Safefree(PL_screamfirst);
913 Safefree(PL_screamnext);
917 Safefree(PL_efloatbuf);
921 /* startup and shutdown function lists */
922 SvREFCNT_dec(PL_beginav);
923 SvREFCNT_dec(PL_beginav_save);
924 SvREFCNT_dec(PL_endav);
925 SvREFCNT_dec(PL_checkav);
926 SvREFCNT_dec(PL_checkav_save);
927 SvREFCNT_dec(PL_initav);
929 PL_beginav_save = NULL;
932 PL_checkav_save = NULL;
935 /* shortcuts just get cleared */
944 PL_last_in_gv = NULL;
952 PL_DBassertion = NULL;
957 SvREFCNT_dec(PL_argvout_stack);
958 PL_argvout_stack = NULL;
960 SvREFCNT_dec(PL_modglobal);
962 SvREFCNT_dec(PL_preambleav);
963 PL_preambleav = NULL;
964 SvREFCNT_dec(PL_subname);
966 SvREFCNT_dec(PL_linestr);
968 #ifdef PERL_USES_PL_PIDSTATUS
969 SvREFCNT_dec(PL_pidstatus);
972 SvREFCNT_dec(PL_toptarget);
974 SvREFCNT_dec(PL_bodytarget);
975 PL_bodytarget = NULL;
976 PL_formtarget = NULL;
978 /* free locale stuff */
979 #ifdef USE_LOCALE_COLLATE
980 Safefree(PL_collation_name);
981 PL_collation_name = NULL;
984 #ifdef USE_LOCALE_NUMERIC
985 Safefree(PL_numeric_name);
986 PL_numeric_name = NULL;
987 SvREFCNT_dec(PL_numeric_radix_sv);
988 PL_numeric_radix_sv = NULL;
991 /* clear utf8 character classes */
992 SvREFCNT_dec(PL_utf8_alnum);
993 SvREFCNT_dec(PL_utf8_alnumc);
994 SvREFCNT_dec(PL_utf8_ascii);
995 SvREFCNT_dec(PL_utf8_alpha);
996 SvREFCNT_dec(PL_utf8_space);
997 SvREFCNT_dec(PL_utf8_cntrl);
998 SvREFCNT_dec(PL_utf8_graph);
999 SvREFCNT_dec(PL_utf8_digit);
1000 SvREFCNT_dec(PL_utf8_upper);
1001 SvREFCNT_dec(PL_utf8_lower);
1002 SvREFCNT_dec(PL_utf8_print);
1003 SvREFCNT_dec(PL_utf8_punct);
1004 SvREFCNT_dec(PL_utf8_xdigit);
1005 SvREFCNT_dec(PL_utf8_mark);
1006 SvREFCNT_dec(PL_utf8_toupper);
1007 SvREFCNT_dec(PL_utf8_totitle);
1008 SvREFCNT_dec(PL_utf8_tolower);
1009 SvREFCNT_dec(PL_utf8_tofold);
1010 SvREFCNT_dec(PL_utf8_idstart);
1011 SvREFCNT_dec(PL_utf8_idcont);
1012 PL_utf8_alnum = NULL;
1013 PL_utf8_alnumc = NULL;
1014 PL_utf8_ascii = NULL;
1015 PL_utf8_alpha = NULL;
1016 PL_utf8_space = NULL;
1017 PL_utf8_cntrl = NULL;
1018 PL_utf8_graph = NULL;
1019 PL_utf8_digit = NULL;
1020 PL_utf8_upper = NULL;
1021 PL_utf8_lower = NULL;
1022 PL_utf8_print = NULL;
1023 PL_utf8_punct = NULL;
1024 PL_utf8_xdigit = NULL;
1025 PL_utf8_mark = NULL;
1026 PL_utf8_toupper = NULL;
1027 PL_utf8_totitle = NULL;
1028 PL_utf8_tolower = NULL;
1029 PL_utf8_tofold = NULL;
1030 PL_utf8_idstart = NULL;
1031 PL_utf8_idcont = NULL;
1033 if (!specialWARN(PL_compiling.cop_warnings))
1034 SvREFCNT_dec(PL_compiling.cop_warnings);
1035 PL_compiling.cop_warnings = NULL;
1036 if (!specialCopIO(PL_compiling.cop_io))
1037 SvREFCNT_dec(PL_compiling.cop_io);
1038 PL_compiling.cop_io = NULL;
1039 CopFILE_free(&PL_compiling);
1040 CopSTASH_free(&PL_compiling);
1042 /* Prepare to destruct main symbol table. */
1047 SvREFCNT_dec(PL_curstname);
1048 PL_curstname = NULL;
1050 /* clear queued errors */
1051 SvREFCNT_dec(PL_errors);
1055 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1056 if (PL_scopestack_ix != 0)
1057 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1059 (long)PL_scopestack_ix);
1060 if (PL_savestack_ix != 0)
1061 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced saves: %ld more saves than restores\n",
1063 (long)PL_savestack_ix);
1064 if (PL_tmps_floor != -1)
1065 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1066 (long)PL_tmps_floor + 1);
1067 if (cxstack_ix != -1)
1068 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1069 (long)cxstack_ix + 1);
1072 /* Now absolutely destruct everything, somehow or other, loops or no. */
1073 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1074 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1076 /* the 2 is for PL_fdpid and PL_strtab */
1077 while (PL_sv_count > 2 && sv_clean_all())
1080 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1081 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1082 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1083 SvFLAGS(PL_strtab) |= SVt_PVHV;
1085 AvREAL_off(PL_fdpid); /* no surviving entries */
1086 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1089 #ifdef HAVE_INTERP_INTERN
1093 /* Destruct the global string table. */
1095 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1096 * so that sv_free() won't fail on them.
1097 * Now that the global string table is using a single hunk of memory
1098 * for both HE and HEK, we either need to explicitly unshare it the
1099 * correct way, or actually free things here.
1102 const I32 max = HvMAX(PL_strtab);
1103 HE * const * const array = HvARRAY(PL_strtab);
1104 HE *hent = array[0];
1107 if (hent && ckWARN_d(WARN_INTERNAL)) {
1108 HE * const next = HeNEXT(hent);
1109 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1110 "Unbalanced string table refcount: (%ld) for \"%s\"",
1111 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1118 hent = array[riter];
1123 HvARRAY(PL_strtab) = 0;
1124 HvTOTALKEYS(PL_strtab) = 0;
1125 HvFILL(PL_strtab) = 0;
1127 SvREFCNT_dec(PL_strtab);
1130 /* free the pointer tables used for cloning */
1131 ptr_table_free(PL_ptr_table);
1132 PL_ptr_table = (PTR_TBL_t*)NULL;
1135 /* free special SVs */
1137 SvREFCNT(&PL_sv_yes) = 0;
1138 sv_clear(&PL_sv_yes);
1139 SvANY(&PL_sv_yes) = NULL;
1140 SvFLAGS(&PL_sv_yes) = 0;
1142 SvREFCNT(&PL_sv_no) = 0;
1143 sv_clear(&PL_sv_no);
1144 SvANY(&PL_sv_no) = NULL;
1145 SvFLAGS(&PL_sv_no) = 0;
1149 for (i=0; i<=2; i++) {
1150 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1151 sv_clear(PERL_DEBUG_PAD(i));
1152 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1153 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1157 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1158 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1160 #ifdef DEBUG_LEAKING_SCALARS
1161 if (PL_sv_count != 0) {
1166 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1167 svend = &sva[SvREFCNT(sva)];
1168 for (sv = sva + 1; sv < svend; ++sv) {
1169 if (SvTYPE(sv) != SVTYPEMASK) {
1170 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1172 " refcnt=%"UVuf pTHX__FORMAT "\n"
1173 "\tallocated at %s:%d %s %s%s\n",
1174 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1175 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1177 sv->sv_debug_inpad ? "for" : "by",
1178 sv->sv_debug_optype ?
1179 PL_op_name[sv->sv_debug_optype]: "(none)",
1180 sv->sv_debug_cloned ? " (cloned)" : ""
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1183 Perl_dump_sv_child(aTHX_ sv);
1189 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1193 /* Wait for up to 4 seconds for child to terminate.
1194 This seems to be the least effort way of timing out on reaping
1196 struct timeval waitfor = {4, 0};
1197 int sock = PL_dumper_fd;
1201 FD_SET(sock, &rset);
1202 select(sock + 1, &rset, NULL, NULL, &waitfor);
1203 waitpid(child, &status, WNOHANG);
1211 #if defined(PERLIO_LAYERS)
1212 /* No more IO - including error messages ! */
1213 PerlIO_cleanup(aTHX);
1216 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1217 as currently layers use it rather than NULL as a marker
1218 for no arg - and will try and SvREFCNT_dec it.
1220 SvREFCNT(&PL_sv_undef) = 0;
1221 SvREADONLY_off(&PL_sv_undef);
1223 Safefree(PL_origfilename);
1224 PL_origfilename = NULL;
1225 Safefree(PL_reg_start_tmp);
1226 PL_reg_start_tmp = (char**)NULL;
1227 PL_reg_start_tmpl = 0;
1228 Safefree(PL_reg_curpm);
1229 Safefree(PL_reg_poscache);
1230 free_tied_hv_pool();
1231 Safefree(PL_op_mask);
1232 Safefree(PL_psig_ptr);
1233 PL_psig_ptr = (SV**)NULL;
1234 Safefree(PL_psig_name);
1235 PL_psig_name = (SV**)NULL;
1236 Safefree(PL_bitcount);
1238 Safefree(PL_psig_pend);
1239 PL_psig_pend = (int*)NULL;
1242 PL_tainting = FALSE;
1243 PL_taint_warn = FALSE;
1244 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1247 DEBUG_P(debprofdump());
1249 #ifdef USE_REENTRANT_API
1250 Perl_reentrant_free(aTHX);
1255 /* As the absolutely last thing, free the non-arena SV for mess() */
1258 /* we know that type == SVt_PVMG */
1260 /* it could have accumulated taint magic */
1263 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1264 moremagic = mg->mg_moremagic;
1265 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1267 Safefree(mg->mg_ptr);
1271 /* we know that type >= SVt_PV */
1272 SvPV_free(PL_mess_sv);
1273 Safefree(SvANY(PL_mess_sv));
1274 Safefree(PL_mess_sv);
1281 =for apidoc perl_free
1283 Releases a Perl interpreter. See L<perlembed>.
1291 #ifdef PERL_TRACK_MEMPOOL
1294 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1295 * value as we're probably hunting memory leaks then
1297 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1298 if (!s || atoi(s) == 0) {
1299 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1300 thread at thread exit. */
1301 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1302 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1307 #if defined(WIN32) || defined(NETWARE)
1308 # if defined(PERL_IMPLICIT_SYS)
1311 void *host = nw_internal_host;
1313 void *host = w32_internal_host;
1315 PerlMem_free(aTHXx);
1317 nw_delete_internal_host(host);
1319 win32_delete_internal_host(host);
1323 PerlMem_free(aTHXx);
1326 PerlMem_free(aTHXx);
1330 #if defined(USE_ITHREADS)
1331 /* provide destructors to clean up the thread key when libperl is unloaded */
1332 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1334 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1335 #pragma fini "perl_fini"
1339 #if defined(__GNUC__)
1340 __attribute__((destructor))
1350 #endif /* THREADS */
1353 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1356 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1357 PL_exitlist[PL_exitlistlen].fn = fn;
1358 PL_exitlist[PL_exitlistlen].ptr = ptr;
1362 #ifdef HAS_PROCSELFEXE
1363 /* This is a function so that we don't hold on to MAXPATHLEN
1364 bytes of stack longer than necessary
1367 S_procself_val(pTHX_ SV *sv, const char *arg0)
1369 char buf[MAXPATHLEN];
1370 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1372 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1373 includes a spurious NUL which will cause $^X to fail in system
1374 or backticks (this will prevent extensions from being built and
1375 many tests from working). readlink is not meant to add a NUL.
1376 Normal readlink works fine.
1378 if (len > 0 && buf[len-1] == '\0') {
1382 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1383 returning the text "unknown" from the readlink rather than the path
1384 to the executable (or returning an error from the readlink). Any valid
1385 path has a '/' in it somewhere, so use that to validate the result.
1386 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1388 if (len > 0 && memchr(buf, '/', len)) {
1389 sv_setpvn(sv,buf,len);
1395 #endif /* HAS_PROCSELFEXE */
1398 S_set_caret_X(pTHX) {
1400 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1402 #ifdef HAS_PROCSELFEXE
1403 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1406 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1408 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1415 =for apidoc perl_parse
1417 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1423 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1430 PERL_UNUSED_VAR(my_perl);
1432 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1435 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1436 setuid perl scripts securely.\n");
1437 #endif /* IAMSUID */
1440 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1441 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1442 * This MUST be done before any hash stores or fetches take place.
1443 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1444 * yourself, it is your responsibility to provide a good random seed!
1445 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1446 if (!PL_rehash_seed_set)
1447 PL_rehash_seed = get_hash_seed();
1449 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1451 if (s && (atoi(s) == 1))
1452 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1454 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1459 if (PL_origalen != 0) {
1460 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1463 /* Set PL_origalen be the sum of the contiguous argv[]
1464 * elements plus the size of the env in case that it is
1465 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1466 * as the maximum modifiable length of $0. In the worst case
1467 * the area we are able to modify is limited to the size of
1468 * the original argv[0]. (See below for 'contiguous', though.)
1470 const char *s = NULL;
1473 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1474 /* Do the mask check only if the args seem like aligned. */
1476 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1478 /* See if all the arguments are contiguous in memory. Note
1479 * that 'contiguous' is a loose term because some platforms
1480 * align the argv[] and the envp[]. If the arguments look
1481 * like non-aligned, assume that they are 'strictly' or
1482 * 'traditionally' contiguous. If the arguments look like
1483 * aligned, we just check that they are within aligned
1484 * PTRSIZE bytes. As long as no system has something bizarre
1485 * like the argv[] interleaved with some other data, we are
1486 * fine. (Did I just evoke Murphy's Law?) --jhi */
1487 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1489 for (i = 1; i < PL_origargc; i++) {
1490 if ((PL_origargv[i] == s + 1
1492 || PL_origargv[i] == s + 2
1497 (PL_origargv[i] > s &&
1499 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1509 /* Can we grab env area too to be used as the area for $0? */
1510 if (s && PL_origenviron) {
1511 if ((PL_origenviron[0] == s + 1
1513 || (PL_origenviron[0] == s + 9 && (s += 8))
1518 (PL_origenviron[0] > s &&
1519 PL_origenviron[0] <=
1520 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1524 s = PL_origenviron[0];
1527 my_setenv("NoNe SuCh", NULL);
1528 /* Force copy of environment. */
1529 for (i = 1; PL_origenviron[i]; i++) {
1530 if (PL_origenviron[i] == s + 1
1533 (PL_origenviron[i] > s &&
1534 PL_origenviron[i] <=
1535 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1538 s = PL_origenviron[i];
1546 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1551 /* Come here if running an undumped a.out. */
1553 PL_origfilename = savepv(argv[0]);
1554 PL_do_undump = FALSE;
1555 cxstack_ix = -1; /* start label stack again */
1557 assert (!PL_tainted);
1559 S_set_caret_X(aTHX);
1561 init_postdump_symbols(argc,argv,env);
1566 op_free(PL_main_root);
1567 PL_main_root = NULL;
1569 PL_main_start = NULL;
1570 SvREFCNT_dec(PL_main_cv);
1574 oldscope = PL_scopestack_ix;
1575 PL_dowarn = G_WARN_OFF;
1580 parse_body(env,xsinit);
1582 call_list(oldscope, PL_checkav);
1589 /* my_exit() was called */
1590 while (PL_scopestack_ix > oldscope)
1593 PL_curstash = PL_defstash;
1595 call_list(oldscope, PL_checkav);
1599 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1608 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1611 int argc = PL_origargc;
1612 char **argv = PL_origargv;
1613 const char *scriptname = NULL;
1614 VOL bool dosearch = FALSE;
1615 const char *validarg = "";
1618 const char *cddir = NULL;
1619 #ifdef USE_SITECUSTOMIZE
1620 bool minus_f = FALSE;
1623 sv_setpvn(PL_linestr,"",0);
1624 sv = newSVpvs(""); /* first used for -I flags */
1628 for (argc--,argv++; argc > 0; argc--,argv++) {
1629 if (argv[0][0] != '-' || !argv[0][1])
1633 validarg = " PHOOEY ";
1637 * Can we rely on the kernel to start scripts with argv[1] set to
1638 * contain all #! line switches (the whole line)? (argv[0] is set to
1639 * the interpreter name, argv[2] to the script name; argv[3] and
1640 * above may contain other arguments.)
1647 #ifndef PERL_STRICT_CR
1672 if ((s = moreswitches(s)))
1677 CHECK_MALLOC_TOO_LATE_FOR('t');
1678 if( !PL_tainting ) {
1679 PL_taint_warn = TRUE;
1685 CHECK_MALLOC_TOO_LATE_FOR('T');
1687 PL_taint_warn = FALSE;
1695 #ifdef MACOS_TRADITIONAL
1696 /* ignore -e for Dev:Pseudo argument */
1697 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1700 forbid_setid('e', -1);
1702 PL_e_script = newSVpvs("");
1703 filter_add(read_e_script, NULL);
1706 sv_catpv(PL_e_script, s);
1708 sv_catpv(PL_e_script, argv[1]);
1712 Perl_croak(aTHX_ "No code specified for -%c", *s);
1713 sv_catpvs(PL_e_script, "\n");
1717 #ifdef USE_SITECUSTOMIZE
1723 case 'I': /* -I handled both here and in moreswitches() */
1724 forbid_setid('I', -1);
1725 if (!*++s && (s=argv[1]) != NULL) {
1729 STRLEN len = strlen(s);
1730 const char * const p = savepvn(s, len);
1731 incpush(p, TRUE, TRUE, FALSE, FALSE);
1732 sv_catpvs(sv, "-I");
1733 sv_catpvn(sv, p, len);
1738 Perl_croak(aTHX_ "No directory specified for -I");
1741 forbid_setid('P', -1);
1742 PL_preprocess = TRUE;
1746 forbid_setid('S', -1);
1755 PL_preambleav = newAV();
1756 av_push(PL_preambleav,
1757 newSVpvs("use Config;"));
1761 opts_prog = newSVpvs("print Config::myconfig(),");
1763 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1765 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1767 opts = SvCUR(opts_prog);
1769 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1773 # ifdef DEBUG_LEAKING_SCALARS
1774 " DEBUG_LEAKING_SCALARS"
1776 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1777 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1779 # ifdef FAKE_THREADS
1782 # ifdef MULTIPLICITY
1791 # ifdef PERL_DONT_CREATE_GVSV
1792 " PERL_DONT_CREATE_GVSV"
1794 # ifdef PERL_GLOBAL_STRUCT
1795 " PERL_GLOBAL_STRUCT"
1797 # ifdef PERL_IMPLICIT_CONTEXT
1798 " PERL_IMPLICIT_CONTEXT"
1800 # ifdef PERL_IMPLICIT_SYS
1801 " PERL_IMPLICIT_SYS"
1806 # ifdef PERL_MALLOC_WRAP
1809 # ifdef PERL_NEED_APPCTX
1812 # ifdef PERL_NEED_TIMESBASE
1813 " PERL_NEED_TIMESBASE"
1815 # ifdef PERL_OLD_COPY_ON_WRITE
1816 " PERL_OLD_COPY_ON_WRITE"
1818 # ifdef PERL_TRACK_MEMPOOL
1819 " PERL_TRACK_MEMPOOL"
1821 # ifdef PERL_USE_SAFE_PUTENV
1822 " PERL_USE_SAFE_PUTENV"
1824 #ifdef PERL_USES_PL_PIDSTATUS
1825 " PERL_USES_PL_PIDSTATUS"
1827 # ifdef PL_OP_SLAB_ALLOC
1830 # ifdef THREADS_HAVE_PIDS
1831 " THREADS_HAVE_PIDS"
1833 # ifdef USE_64_BIT_ALL
1836 # ifdef USE_64_BIT_INT
1839 # ifdef USE_ITHREADS
1842 # ifdef USE_LARGE_FILES
1845 # ifdef USE_LONG_DOUBLE
1851 # ifdef USE_REENTRANT_API
1852 " USE_REENTRANT_API"
1857 # ifdef USE_SITECUSTOMIZE
1858 " USE_SITECUSTOMIZE"
1865 while (SvCUR(opts_prog) > opts+76) {
1866 /* find last space after "options: " and before col 76
1870 char * const pv = SvPV_nolen(opts_prog);
1871 const char c = pv[opts+76];
1873 space = strrchr(pv+opts+26, ' ');
1875 if (!space) break; /* "Can't happen" */
1877 /* break the line before that space */
1880 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1881 STR_WITH_LEN("\\n "));
1884 sv_catpvs(opts_prog,"\\n\",");
1886 #if defined(LOCAL_PATCH_COUNT)
1887 if (LOCAL_PATCH_COUNT > 0) {
1889 sv_catpvs(opts_prog,
1890 "\" Locally applied patches:\\n\",");
1891 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1892 if (PL_localpatches[i])
1893 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1894 0, PL_localpatches[i], 0);
1898 Perl_sv_catpvf(aTHX_ opts_prog,
1899 "\" Built under %s\\n\"",OSNAME);
1902 Perl_sv_catpvf(aTHX_ opts_prog,
1903 ",\" Compiled at %s %s\\n\"",__DATE__,
1906 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1910 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1911 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1912 "sort grep {/^PERL/} keys %ENV; ");
1914 sv_catpvs(opts_prog,
1915 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1917 sv_catpvs(opts_prog,
1918 "print \" \\%ENV:\\n @env\\n\" if @env;"
1919 "print \" \\@INC:\\n @INC\\n\";");
1923 opts_prog = Perl_newSVpvf(aTHX_
1924 "Config::config_vars(qw%c%s%c)",
1928 av_push(PL_preambleav, opts_prog);
1929 /* don't look for script or read stdin */
1930 scriptname = BIT_BUCKET;
1934 PL_doextract = TRUE;
1942 if (!*++s || isSPACE(*s)) {
1946 /* catch use of gnu style long options */
1947 if (strEQ(s, "version")) {
1951 if (strEQ(s, "help")) {
1958 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1964 #ifndef SECURE_INTERNAL_GETENV
1967 (s = PerlEnv_getenv("PERL5OPT")))
1969 const char *popt = s;
1972 if (*s == '-' && *(s+1) == 'T') {
1973 CHECK_MALLOC_TOO_LATE_FOR('T');
1975 PL_taint_warn = FALSE;
1978 char *popt_copy = NULL;
1991 if (!strchr("CDIMUdmtwA", *s))
1992 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1996 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1997 s = popt_copy + (s - popt);
1998 d = popt_copy + (d - popt);
2005 if( !PL_tainting ) {
2006 PL_taint_warn = TRUE;
2016 #ifdef USE_SITECUSTOMIZE
2019 PL_preambleav = newAV();
2020 av_unshift(PL_preambleav, 1);
2021 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2025 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2026 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2030 scriptname = argv[0];
2033 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2035 else if (scriptname == NULL) {
2037 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2043 /* Set $^X early so that it can be used for relocatable paths in @INC */
2044 assert (!PL_tainted);
2046 S_set_caret_X(aTHX);
2053 = open_script(scriptname, dosearch, sv, &suidscript);
2055 validate_suid(validarg, scriptname, fdscript, suidscript);
2058 # if defined(SIGCHLD) || defined(SIGCLD)
2061 # define SIGCHLD SIGCLD
2063 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2064 if (sigstate == (Sighandler_t) SIG_IGN) {
2065 if (ckWARN(WARN_SIGNAL))
2066 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2067 "Can't ignore signal CHLD, forcing to default");
2068 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2075 #ifdef MACOS_TRADITIONAL
2076 || gMacPerl_AlwaysExtract
2080 /* This will croak if suidscript is >= 0, as -x cannot be used with
2082 forbid_setid('x', suidscript);
2083 /* Hence you can't get here if suidscript >= 0 */
2086 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2087 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2091 PL_main_cv = PL_compcv = (CV*)newSV(0);
2092 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2093 CvUNIQUE_on(PL_compcv);
2095 CvPADLIST(PL_compcv) = pad_new(0);
2098 boot_core_UNIVERSAL();
2099 boot_core_xsutils();
2102 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2104 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2110 # ifdef HAS_SOCKS5_INIT
2111 socks5_init(argv[0]);
2117 init_predump_symbols();
2118 /* init_postdump_symbols not currently designed to be called */
2119 /* more than once (ENV isn't cleared first, for example) */
2120 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2122 init_postdump_symbols(argc,argv,env);
2124 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2125 * or explicitly in some platforms.
2126 * locale.c:Perl_init_i18nl10n() if the environment
2127 * look like the user wants to use UTF-8. */
2128 #if defined(__SYMBIAN32__)
2129 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2132 /* Requires init_predump_symbols(). */
2133 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2138 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2139 * and the default open disciplines. */
2140 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2141 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2143 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2144 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2145 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2147 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2148 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2149 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2151 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2152 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2153 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2155 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2156 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2159 sv_setpvn(sv, ":utf8\0:utf8", 11);
2161 sv_setpvn(sv, ":utf8\0", 6);
2164 sv_setpvn(sv, "\0:utf8", 6);
2170 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2171 if (strEQ(s, "unsafe"))
2172 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2173 else if (strEQ(s, "safe"))
2174 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2176 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2181 /* now parse the script */
2183 SETERRNO(0,SS_NORMAL);
2185 #ifdef MACOS_TRADITIONAL
2186 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2188 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2190 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2191 MacPerl_MPWFileName(PL_origfilename));
2195 if (yyparse() || PL_error_count) {
2197 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2199 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2204 CopLINE_set(PL_curcop, 0);
2205 PL_curstash = PL_defstash;
2206 PL_preprocess = FALSE;
2208 SvREFCNT_dec(PL_e_script);
2216 SAVECOPFILE(PL_curcop);
2217 SAVECOPLINE(PL_curcop);
2218 gv_check(PL_defstash);
2225 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2226 dump_mstats("after compilation:");
2235 =for apidoc perl_run
2237 Tells a Perl interpreter to run. See L<perlembed>.
2250 PERL_UNUSED_CONTEXT;
2252 oldscope = PL_scopestack_ix;
2260 cxstack_ix = -1; /* start context stack again */
2262 case 0: /* normal completion */
2266 case 2: /* my_exit() */
2267 while (PL_scopestack_ix > oldscope)
2270 PL_curstash = PL_defstash;
2271 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2272 PL_endav && !PL_minus_c)
2273 call_list(oldscope, PL_endav);
2275 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2276 dump_mstats("after execution: ");
2282 POPSTACK_TO(PL_mainstack);
2285 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2297 S_run_body(pTHX_ I32 oldscope)
2300 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2301 PL_sawampersand ? "Enabling" : "Omitting"));
2303 if (!PL_restartop) {
2304 DEBUG_x(dump_all());
2307 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2309 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2313 #ifdef MACOS_TRADITIONAL
2314 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2315 (gMacPerl_ErrorFormat ? "# " : ""),
2316 MacPerl_MPWFileName(PL_origfilename));
2318 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2322 if (PERLDB_SINGLE && PL_DBsingle)
2323 sv_setiv(PL_DBsingle, 1);
2325 call_list(oldscope, PL_initav);
2331 PL_op = PL_restartop;
2335 else if (PL_main_start) {
2336 CvDEPTH(PL_main_cv) = 1;
2337 PL_op = PL_main_start;
2345 =head1 SV Manipulation Functions
2347 =for apidoc p||get_sv
2349 Returns the SV of the specified Perl scalar. If C<create> is set and the
2350 Perl variable does not exist then it will be created. If C<create> is not
2351 set and the variable does not exist then NULL is returned.
2357 Perl_get_sv(pTHX_ const char *name, I32 create)
2360 gv = gv_fetchpv(name, create, SVt_PV);
2367 =head1 Array Manipulation Functions
2369 =for apidoc p||get_av
2371 Returns the AV of the specified Perl array. If C<create> is set and the
2372 Perl variable does not exist then it will be created. If C<create> is not
2373 set and the variable does not exist then NULL is returned.
2379 Perl_get_av(pTHX_ const char *name, I32 create)
2381 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2390 =head1 Hash Manipulation Functions
2392 =for apidoc p||get_hv
2394 Returns the HV of the specified Perl hash. If C<create> is set and the
2395 Perl variable does not exist then it will be created. If C<create> is not
2396 set and the variable does not exist then NULL is returned.
2402 Perl_get_hv(pTHX_ const char *name, I32 create)
2404 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2413 =head1 CV Manipulation Functions
2415 =for apidoc p||get_cv
2417 Returns the CV of the specified Perl subroutine. If C<create> is set and
2418 the Perl subroutine does not exist then it will be declared (which has the
2419 same effect as saying C<sub name;>). If C<create> is not set and the
2420 subroutine does not exist then NULL is returned.
2426 Perl_get_cv(pTHX_ const char *name, I32 create)
2428 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2429 /* XXX unsafe for threads if eval_owner isn't held */
2430 /* XXX this is probably not what they think they're getting.
2431 * It has the same effect as "sub name;", i.e. just a forward
2433 if (create && !GvCVu(gv))
2434 return newSUB(start_subparse(FALSE, 0),
2435 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2442 /* Be sure to refetch the stack pointer after calling these routines. */
2446 =head1 Callback Functions
2448 =for apidoc p||call_argv
2450 Performs a callback to the specified Perl sub. See L<perlcall>.
2456 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2458 /* See G_* flags in cop.h */
2459 /* null terminated arg list */
2467 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2472 return call_pv(sub_name, flags);
2476 =for apidoc p||call_pv
2478 Performs a callback to the specified Perl sub. See L<perlcall>.
2484 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2485 /* name of the subroutine */
2486 /* See G_* flags in cop.h */
2488 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2492 =for apidoc p||call_method
2494 Performs a callback to the specified Perl method. The blessed object must
2495 be on the stack. See L<perlcall>.
2501 Perl_call_method(pTHX_ const char *methname, I32 flags)
2502 /* name of the subroutine */
2503 /* See G_* flags in cop.h */
2505 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2508 /* May be called with any of a CV, a GV, or an SV containing the name. */
2510 =for apidoc p||call_sv
2512 Performs a callback to the Perl sub whose name is in the SV. See
2519 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2520 /* See G_* flags in cop.h */
2523 LOGOP myop; /* fake syntax tree node */
2526 volatile I32 retval = 0;
2528 bool oldcatch = CATCH_GET;
2530 OP* const oldop = PL_op;
2533 if (flags & G_DISCARD) {
2538 Zero(&myop, 1, LOGOP);
2539 myop.op_next = NULL;
2540 if (!(flags & G_NOARGS))
2541 myop.op_flags |= OPf_STACKED;
2542 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2543 (flags & G_ARRAY) ? OPf_WANT_LIST :
2548 EXTEND(PL_stack_sp, 1);
2549 *++PL_stack_sp = sv;
2551 oldscope = PL_scopestack_ix;
2553 if (PERLDB_SUB && PL_curstash != PL_debstash
2554 /* Handle first BEGIN of -d. */
2555 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2556 /* Try harder, since this may have been a sighandler, thus
2557 * curstash may be meaningless. */
2558 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2559 && !(flags & G_NODEBUG))
2560 PL_op->op_private |= OPpENTERSUB_DB;
2562 if (flags & G_METHOD) {
2563 Zero(&method_op, 1, UNOP);
2564 method_op.op_next = PL_op;
2565 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2566 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2567 PL_op = (OP*)&method_op;
2570 if (!(flags & G_EVAL)) {
2572 call_body((OP*)&myop, FALSE);
2573 retval = PL_stack_sp - (PL_stack_base + oldmark);
2574 CATCH_SET(oldcatch);
2577 myop.op_other = (OP*)&myop;
2579 /* we're trying to emulate pp_entertry() here */
2581 register PERL_CONTEXT *cx;
2582 const I32 gimme = GIMME_V;
2587 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2589 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2591 PL_in_eval = EVAL_INEVAL;
2592 if (flags & G_KEEPERR)
2593 PL_in_eval |= EVAL_KEEPERR;
2595 sv_setpvn(ERRSV,"",0);
2603 call_body((OP*)&myop, FALSE);
2604 retval = PL_stack_sp - (PL_stack_base + oldmark);
2605 if (!(flags & G_KEEPERR))
2606 sv_setpvn(ERRSV,"",0);
2612 /* my_exit() was called */
2613 PL_curstash = PL_defstash;
2616 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2617 Perl_croak(aTHX_ "Callback called exit");
2622 PL_op = PL_restartop;
2626 PL_stack_sp = PL_stack_base + oldmark;
2627 if (flags & G_ARRAY)
2631 *++PL_stack_sp = &PL_sv_undef;
2636 if (PL_scopestack_ix > oldscope) {
2640 register PERL_CONTEXT *cx;
2647 PERL_UNUSED_VAR(newsp);
2648 PERL_UNUSED_VAR(gimme);
2649 PERL_UNUSED_VAR(optype);
2654 if (flags & G_DISCARD) {
2655 PL_stack_sp = PL_stack_base + oldmark;
2665 S_call_body(pTHX_ const OP *myop, bool is_eval)
2668 if (PL_op == myop) {
2670 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2672 PL_op = Perl_pp_entersub(aTHX); /* this does */
2678 /* Eval a string. The G_EVAL flag is always assumed. */
2681 =for apidoc p||eval_sv
2683 Tells Perl to C<eval> the string in the SV.
2689 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2691 /* See G_* flags in cop.h */
2695 UNOP myop; /* fake syntax tree node */
2696 volatile I32 oldmark = SP - PL_stack_base;
2697 volatile I32 retval = 0;
2699 OP* const oldop = PL_op;
2702 if (flags & G_DISCARD) {
2709 Zero(PL_op, 1, UNOP);
2710 EXTEND(PL_stack_sp, 1);
2711 *++PL_stack_sp = sv;
2713 if (!(flags & G_NOARGS))
2714 myop.op_flags = OPf_STACKED;
2715 myop.op_next = NULL;
2716 myop.op_type = OP_ENTEREVAL;
2717 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2718 (flags & G_ARRAY) ? OPf_WANT_LIST :
2720 if (flags & G_KEEPERR)
2721 myop.op_flags |= OPf_SPECIAL;
2723 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2724 * before a PUSHEVAL, which corrupts the stack after a croak */
2725 TAINT_PROPER("eval_sv()");
2731 call_body((OP*)&myop,TRUE);
2732 retval = PL_stack_sp - (PL_stack_base + oldmark);
2733 if (!(flags & G_KEEPERR))
2734 sv_setpvn(ERRSV,"",0);
2740 /* my_exit() was called */
2741 PL_curstash = PL_defstash;
2744 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2745 Perl_croak(aTHX_ "Callback called exit");
2750 PL_op = PL_restartop;
2754 PL_stack_sp = PL_stack_base + oldmark;
2755 if (flags & G_ARRAY)
2759 *++PL_stack_sp = &PL_sv_undef;
2765 if (flags & G_DISCARD) {
2766 PL_stack_sp = PL_stack_base + oldmark;
2776 =for apidoc p||eval_pv
2778 Tells Perl to C<eval> the given string and return an SV* result.
2784 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2788 SV* sv = newSVpv(p, 0);
2790 eval_sv(sv, G_SCALAR);
2797 if (croak_on_error && SvTRUE(ERRSV)) {
2798 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2804 /* Require a module. */
2807 =head1 Embedding Functions
2809 =for apidoc p||require_pv
2811 Tells Perl to C<require> the file named by the string argument. It is
2812 analogous to the Perl code C<eval "require '$file'">. It's even
2813 implemented that way; consider using load_module instead.
2818 Perl_require_pv(pTHX_ const char *pv)
2823 PUSHSTACKi(PERLSI_REQUIRE);
2825 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2826 eval_sv(sv_2mortal(sv), G_DISCARD);
2832 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2834 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2837 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2841 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2843 /* This message really ought to be max 23 lines.
2844 * Removed -h because the user already knows that option. Others? */
2846 static const char * const usage_msg[] = {
2847 "-0[octal] specify record separator (\\0, if no argument)",
2848 "-A[mod][=pattern] activate all/given assertions",
2849 "-a autosplit mode with -n or -p (splits $_ into @F)",
2850 "-C[number/list] enables the listed Unicode features",
2851 "-c check syntax only (runs BEGIN and CHECK blocks)",
2852 "-d[:debugger] run program under debugger",
2853 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2854 "-e program one line of program (several -e's allowed, omit programfile)",
2855 "-E program like -e, but enables all optional features",
2856 "-f don't do $sitelib/sitecustomize.pl at startup",
2857 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2858 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2859 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2860 "-l[octal] enable line ending processing, specifies line terminator",
2861 "-[mM][-]module execute \"use/no module...\" before executing program",
2862 "-n assume \"while (<>) { ... }\" loop around program",
2863 "-p assume loop like -n but print line also, like sed",
2864 "-P run program through C preprocessor before compilation",
2865 "-s enable rudimentary parsing for switches after programfile",
2866 "-S look for programfile using PATH environment variable",
2867 "-t enable tainting warnings",
2868 "-T enable tainting checks",
2869 "-u dump core after parsing program",
2870 "-U allow unsafe operations",
2871 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2872 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2873 "-w enable many useful warnings (RECOMMENDED)",
2874 "-W enable all warnings",
2875 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2876 "-X disable all warnings",
2880 const char * const *p = usage_msg;
2882 PerlIO_printf(PerlIO_stdout(),
2883 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2886 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2889 /* convert a string of -D options (or digits) into an int.
2890 * sets *s to point to the char after the options */
2894 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2896 static const char * const usage_msgd[] = {
2897 " Debugging flag values: (see also -d)",
2898 " p Tokenizing and parsing (with v, displays parse stack)",
2899 " s Stack snapshots (with v, displays all stacks)",
2900 " l Context (loop) stack processing",
2901 " t Trace execution",
2902 " o Method and overloading resolution",
2903 " c String/numeric conversions",
2904 " P Print profiling info, preprocessor command for -P, source file input state",
2905 " m Memory allocation",
2906 " f Format processing",
2907 " r Regular expression parsing and execution",
2908 " x Syntax tree dump",
2909 " u Tainting checks",
2910 " H Hash dump -- usurps values()",
2911 " X Scratchpad allocation",
2913 " S Thread synchronization",
2915 " R Include reference counts of dumped variables (eg when using -Ds)",
2916 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2917 " v Verbose: use in conjunction with other flags",
2919 " A Consistency checks on internal structures",
2920 " q quiet - currently only suppresses the 'EXECUTING' message",
2925 /* if adding extra options, remember to update DEBUG_MASK */
2926 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2928 for (; isALNUM(**s); (*s)++) {
2929 const char * const d = strchr(debopts,**s);
2931 i |= 1 << (d - debopts);
2932 else if (ckWARN_d(WARN_DEBUGGING))
2933 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2934 "invalid option -D%c, use -D'' to see choices\n", **s);
2937 else if (isDIGIT(**s)) {
2939 for (; isALNUM(**s); (*s)++) ;
2941 else if (givehelp) {
2942 const char *const *p = usage_msgd;
2943 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2946 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2947 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2948 "-Dp not implemented on this platform\n");
2954 /* This routine handles any switches that can be given during run */
2957 Perl_moreswitches(pTHX_ char *s)
2968 SvREFCNT_dec(PL_rs);
2969 if (s[1] == 'x' && s[2]) {
2970 const char *e = s+=2;
2976 flags = PERL_SCAN_SILENT_ILLDIGIT;
2977 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2978 if (s + numlen < e) {
2979 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2983 PL_rs = newSVpvs("");
2984 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2985 tmps = (U8*)SvPVX(PL_rs);
2986 uvchr_to_utf8(tmps, rschar);
2987 SvCUR_set(PL_rs, UNISKIP(rschar));
2992 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2993 if (rschar & ~((U8)~0))
2994 PL_rs = &PL_sv_undef;
2995 else if (!rschar && numlen >= 2)
2996 PL_rs = newSVpvs("");
2998 char ch = (char)rschar;
2999 PL_rs = newSVpvn(&ch, 1);
3002 sv_setsv(get_sv("/", TRUE), PL_rs);
3007 PL_unicode = parse_unicode_opts( (const char **)&s );
3012 while (*s && !isSPACE(*s)) ++s;
3013 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3024 forbid_setid('d', -1);
3027 /* -dt indicates to the debugger that threads will be used */
3028 if (*s == 't' && !isALNUM(s[1])) {
3030 my_setenv("PERL5DB_THREADED", "1");
3033 /* The following permits -d:Mod to accepts arguments following an =
3034 in the fashion that -MSome::Mod does. */
3035 if (*s == ':' || *s == '=') {
3037 SV * const sv = newSVpvs("use Devel::");
3039 /* We now allow -d:Module=Foo,Bar */
3040 while(isALNUM(*s) || *s==':') ++s;
3042 sv_catpv(sv, start);
3044 sv_catpvn(sv, start, s-start);
3045 /* Don't use NUL as q// delimiter here, this string goes in the
3047 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3050 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3053 PL_perldb = PERLDB_ALL;
3060 forbid_setid('D', -1);
3062 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3063 #else /* !DEBUGGING */
3064 if (ckWARN_d(WARN_DEBUGGING))
3065 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3066 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3067 for (s++; isALNUM(*s); s++) ;
3072 usage(PL_origargv[0]);
3075 Safefree(PL_inplace);
3076 #if defined(__CYGWIN__) /* do backup extension automagically */
3077 if (*(s+1) == '\0') {
3078 PL_inplace = savepvs(".bak");
3081 #endif /* __CYGWIN__ */
3082 PL_inplace = savepv(s+1);
3083 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3087 if (*s == '-') /* Additional switches on #! line. */
3091 case 'I': /* -I handled both here and in parse_body() */
3092 forbid_setid('I', -1);
3094 while (*s && isSPACE(*s))
3099 /* ignore trailing spaces (possibly followed by other switches) */
3101 for (e = p; *e && !isSPACE(*e); e++) ;
3105 } while (*p && *p != '-');
3106 e = savepvn(s, e-s);
3107 incpush(e, TRUE, TRUE, FALSE, FALSE);
3114 Perl_croak(aTHX_ "No directory specified for -I");
3120 SvREFCNT_dec(PL_ors_sv);
3126 PL_ors_sv = newSVpvs("\n");
3127 numlen = 3 + (*s == '0');
3128 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3132 if (RsPARA(PL_rs)) {
3133 PL_ors_sv = newSVpvs("\n\n");
3136 PL_ors_sv = newSVsv(PL_rs);
3141 forbid_setid('A', -1);
3143 PL_preambleav = newAV();
3146 char * const start = s;
3147 SV * const sv = newSVpvs("use assertions::activate");
3148 while(isALNUM(*s) || *s == ':') ++s;
3150 sv_catpvs(sv, "::");
3151 sv_catpvn(sv, start, s-start);
3154 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3157 else if (*s != '\0') {
3158 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3160 av_push(PL_preambleav, sv);
3164 forbid_setid('M', -1); /* XXX ? */
3167 forbid_setid('m', -1); /* XXX ? */
3171 const char *use = "use ";
3172 /* -M-foo == 'no foo' */
3173 /* Leading space on " no " is deliberate, to make both
3174 possibilities the same length. */
3175 if (*s == '-') { use = " no "; ++s; }
3176 sv = newSVpvn(use,4);
3178 /* We allow -M'Module qw(Foo Bar)' */
3179 while(isALNUM(*s) || *s==':') ++s;
3181 sv_catpv(sv, start);
3182 if (*(start-1) == 'm') {
3184 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3185 sv_catpvs( sv, " ()");
3189 Perl_croak(aTHX_ "Module name required with -%c option",
3191 sv_catpvn(sv, start, s-start);
3192 sv_catpvs(sv, " split(/,/,q");
3193 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3195 sv_catpvs(sv, "\0)");
3199 PL_preambleav = newAV();
3200 av_push(PL_preambleav, sv);
3203 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3214 forbid_setid('s', -1);
3215 PL_doswitches = TRUE;
3229 #ifdef MACOS_TRADITIONAL
3230 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3232 PL_do_undump = TRUE;
3240 if (!sv_derived_from(PL_patchlevel, "version"))
3241 upg_version(PL_patchlevel);
3243 PerlIO_printf(PerlIO_stdout(),
3244 Perl_form(aTHX_ "\nThis is perl, %"SVf
3245 #ifdef PERL_PATCHNUM
3246 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3249 vstringify(PL_patchlevel),
3252 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3253 PerlIO_printf(PerlIO_stdout(),
3254 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3255 vstringify(PL_patchlevel)));
3256 PerlIO_printf(PerlIO_stdout(),
3257 Perl_form(aTHX_ " built under %s at %s %s\n",
3258 OSNAME, __DATE__, __TIME__));
3259 PerlIO_printf(PerlIO_stdout(),
3260 Perl_form(aTHX_ " OS Specific Release: %s\n",
3264 #if defined(LOCAL_PATCH_COUNT)
3265 if (LOCAL_PATCH_COUNT > 0)
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\n(with %d registered patch%s, "
3268 "see perl -V for more detail)",
3269 (int)LOCAL_PATCH_COUNT,
3270 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "\n\nCopyright 1987-2006, Larry Wall\n");
3275 #ifdef MACOS_TRADITIONAL
3276 PerlIO_printf(PerlIO_stdout(),
3277 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3278 "maintained by Chris Nandor\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3287 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3292 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "atariST series port, ++jrb bammi@cadence.com\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "MiNT port by Guido Flohr, 1997-1999\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "EPOC port by Olaf Flebbe, 1999-2002\n");
3331 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3332 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3335 #ifdef __SYMBIAN32__
3336 PerlIO_printf(PerlIO_stdout(),
3337 "Symbian port by Nokia, 2004-2005\n");
3339 #ifdef BINARY_BUILD_NOTICE
3340 BINARY_BUILD_NOTICE;
3342 PerlIO_printf(PerlIO_stdout(),
3344 Perl may be copied only under the terms of either the Artistic License or the\n\
3345 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3346 Complete documentation for Perl, including FAQ lists, should be found on\n\
3347 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3348 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3351 if (! (PL_dowarn & G_WARN_ALL_MASK))
3352 PL_dowarn |= G_WARN_ON;
3356 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3357 if (!specialWARN(PL_compiling.cop_warnings))
3358 SvREFCNT_dec(PL_compiling.cop_warnings);
3359 PL_compiling.cop_warnings = pWARN_ALL ;
3363 PL_dowarn = G_WARN_ALL_OFF;
3364 if (!specialWARN(PL_compiling.cop_warnings))
3365 SvREFCNT_dec(PL_compiling.cop_warnings);
3366 PL_compiling.cop_warnings = pWARN_NONE ;
3371 if (s[1] == '-') /* Additional switches on #! line. */
3376 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3382 #ifdef ALTERNATE_SHEBANG
3383 case 'S': /* OS/2 needs -S on "extproc" line. */
3391 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3396 /* compliments of Tom Christiansen */
3398 /* unexec() can be found in the Gnu emacs distribution */
3399 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3402 Perl_my_unexec(pTHX)
3404 PERL_UNUSED_CONTEXT;
3406 SV * prog = newSVpv(BIN_EXP, 0);
3407 SV * file = newSVpv(PL_origfilename, 0);
3411 sv_catpvs(prog, "/perl");
3412 sv_catpvs(file, ".perldump");
3414 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3415 /* unexec prints msg to stderr in case of failure */
3416 PerlProc_exit(status);
3419 # include <lib$routines.h>
3420 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3421 # elif defined(WIN32) || defined(__CYGWIN__)
3422 Perl_croak(aTHX_ "dump is not supported");
3424 ABORT(); /* for use with undump */
3429 /* initialize curinterp */
3435 # define PERLVAR(var,type)
3436 # define PERLVARA(var,n,type)
3437 # if defined(PERL_IMPLICIT_CONTEXT)
3438 # define PERLVARI(var,type,init) aTHX->var = init;
3439 # define PERLVARIC(var,type,init) aTHX->var = init;
3441 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3442 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3444 # include "intrpvar.h"
3445 # include "thrdvar.h"
3451 # define PERLVAR(var,type)
3452 # define PERLVARA(var,n,type)
3453 # define PERLVARI(var,type,init) PL_##var = init;
3454 # define PERLVARIC(var,type,init) PL_##var = init;
3455 # include "intrpvar.h"
3456 # include "thrdvar.h"
3466 S_init_main_stash(pTHX)
3471 PL_curstash = PL_defstash = newHV();
3472 /* We know that the string "main" will be in the global shared string
3473 table, so it's a small saving to use it rather than allocate another
3475 PL_curstname = newSVpvs_share("main");
3476 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3477 /* If we hadn't caused another reference to "main" to be in the shared
3478 string table above, then it would be worth reordering these two,
3479 because otherwise all we do is delete "main" from it as a consequence
3480 of the SvREFCNT_dec, only to add it again with hv_name_set */
3481 SvREFCNT_dec(GvHV(gv));
3482 hv_name_set(PL_defstash, "main", 4, 0);
3483 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3485 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3487 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3488 GvMULTI_on(PL_incgv);
3489 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3490 GvMULTI_on(PL_hintgv);
3491 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3492 SvREFCNT_inc_simple(PL_defgv);
3493 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3494 SvREFCNT_inc_simple(PL_errgv);
3495 GvMULTI_on(PL_errgv);
3496 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3497 GvMULTI_on(PL_replgv);
3498 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3499 #ifdef PERL_DONT_CREATE_GVSV
3502 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3503 sv_setpvn(ERRSV, "", 0);
3504 PL_curstash = PL_defstash;
3505 CopSTASH_set(&PL_compiling, PL_defstash);
3506 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3507 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3509 /* We must init $/ before switches are processed. */
3510 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3514 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3520 const char *cpp_discard_flag;
3529 PL_origfilename = savepvs("-e");
3532 /* if find_script() returns, it returns a malloc()-ed value */
3533 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3535 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3536 const char *s = scriptname + 8;
3542 * Tell apart "normal" usage of fdscript, e.g.
3543 * with bash on FreeBSD:
3544 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3545 * from usage in suidperl.
3546 * Does any "normal" usage leave garbage after the number???
3547 * Is it a mistake to use a similar /dev/fd/ construct for
3552 * Be supersafe and do some sanity-checks.
3553 * Still, can we be sure we got the right thing?
3556 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3559 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3561 scriptname = savepv(s + 1);
3562 Safefree(PL_origfilename);
3563 PL_origfilename = (char *)scriptname;
3568 CopFILE_free(PL_curcop);
3569 CopFILE_set(PL_curcop, PL_origfilename);
3570 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3571 scriptname = (char *)"";
3572 if (fdscript >= 0) {
3573 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3574 # if defined(HAS_FCNTL) && defined(F_SETFD)
3576 /* ensure close-on-exec */
3577 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3582 Perl_croak(aTHX_ "sperl needs fd script\n"
3583 "You should not call sperl directly; do you need to "
3584 "change a #! line\nfrom sperl to perl?\n");
3587 * Do not open (or do other fancy stuff) while setuid.
3588 * Perl does the open, and hands script to suidperl on a fd;
3589 * suidperl only does some checks, sets up UIDs and re-execs
3590 * perl with that fd as it has always done.
3593 if (*suidscript != 1) {
3594 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3597 else if (PL_preprocess) {
3598 const char * const cpp_cfg = CPPSTDIN;
3599 SV * const cpp = newSVpvs("");
3600 SV * const cmd = newSV(0);
3602 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3603 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3604 if (strEQ(cpp_cfg, "cppstdin"))
3605 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3606 sv_catpv(cpp, cpp_cfg);
3609 sv_catpvs(sv, "-I");
3610 sv_catpv(sv,PRIVLIB_EXP);
3613 DEBUG_P(PerlIO_printf(Perl_debug_log,
3614 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3615 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3618 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3625 cpp_discard_flag = "";
3627 cpp_discard_flag = "-C";
3631 perl = os2_execname(aTHX);
3633 perl = PL_origargv[0];
3637 /* This strips off Perl comments which might interfere with
3638 the C pre-processor, including #!. #line directives are
3639 deliberately stripped to avoid confusion with Perl's version
3640 of #line. FWP played some golf with it so it will fit
3641 into VMS's 255 character buffer.
3644 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3646 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3648 Perl_sv_setpvf(aTHX_ cmd, "\
3649 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3650 perl, quote, code, quote, scriptname, cpp,
3651 cpp_discard_flag, sv, CPPMINUS);
3653 PL_doextract = FALSE;
3655 DEBUG_P(PerlIO_printf(Perl_debug_log,
3656 "PL_preprocess: cmd=\"%s\"\n",
3659 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3663 else if (!*scriptname) {
3664 forbid_setid(0, *suidscript);
3665 PL_rsfp = PerlIO_stdin();
3668 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3669 # if defined(HAS_FCNTL) && defined(F_SETFD)
3671 /* ensure close-on-exec */
3672 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3675 #endif /* IAMSUID */
3677 /* PSz 16 Sep 03 Keep neat error message */
3679 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3681 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3682 CopFILE(PL_curcop), Strerror(errno));
3688 * I_SYSSTATVFS HAS_FSTATVFS
3690 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3691 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3692 * here so that metaconfig picks them up. */
3696 S_fd_on_nosuid_fs(pTHX_ int fd)
3699 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3700 * but is needed also on machines without setreuid.
3701 * Seems safe enough to run as root.
3703 int check_okay = 0; /* able to do all the required sys/libcalls */
3704 int on_nosuid = 0; /* the fd is on a nosuid fs */
3706 * Need to check noexec also: nosuid might not be set, the average
3707 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3709 int on_noexec = 0; /* the fd is on a noexec fs */
3712 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3713 * fstatvfs() is UNIX98.
3714 * fstatfs() is 4.3 BSD.
3715 * ustat()+getmnt() is pre-4.3 BSD.
3716 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3717 * an irrelevant filesystem while trying to reach the right one.
3720 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3722 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3723 defined(HAS_FSTATVFS)
3724 # define FD_ON_NOSUID_CHECK_OKAY
3725 struct statvfs stfs;
3727 check_okay = fstatvfs(fd, &stfs) == 0;
3728 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3730 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3731 on platforms where it is present. */
3732 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3734 # endif /* fstatvfs */
3736 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3737 defined(PERL_MOUNT_NOSUID) && \
3738 defined(PERL_MOUNT_NOEXEC) && \
3739 defined(HAS_FSTATFS) && \
3740 defined(HAS_STRUCT_STATFS) && \
3741 defined(HAS_STRUCT_STATFS_F_FLAGS)
3742 # define FD_ON_NOSUID_CHECK_OKAY
3745 check_okay = fstatfs(fd, &stfs) == 0;
3746 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3747 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3748 # endif /* fstatfs */
3750 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3751 defined(PERL_MOUNT_NOSUID) && \
3752 defined(PERL_MOUNT_NOEXEC) && \
3753 defined(HAS_FSTAT) && \
3754 defined(HAS_USTAT) && \
3755 defined(HAS_GETMNT) && \
3756 defined(HAS_STRUCT_FS_DATA) && \
3758 # define FD_ON_NOSUID_CHECK_OKAY
3761 if (fstat(fd, &fdst) == 0) {
3763 if (ustat(fdst.st_dev, &us) == 0) {
3765 /* NOSTAT_ONE here because we're not examining fields which
3766 * vary between that case and STAT_ONE. */
3767 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3768 size_t cmplen = sizeof(us.f_fname);
3769 if (sizeof(fsd.fd_req.path) < cmplen)
3770 cmplen = sizeof(fsd.fd_req.path);
3771 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3772 fdst.st_dev == fsd.fd_req.dev) {
3774 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3775 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3780 # endif /* fstat+ustat+getmnt */
3782 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3783 defined(HAS_GETMNTENT) && \
3784 defined(HAS_HASMNTOPT) && \
3785 defined(MNTOPT_NOSUID) && \
3786 defined(MNTOPT_NOEXEC)
3787 # define FD_ON_NOSUID_CHECK_OKAY
3788 FILE *mtab = fopen("/etc/mtab", "r");
3789 struct mntent *entry;
3792 if (mtab && (fstat(fd, &stb) == 0)) {
3793 while (entry = getmntent(mtab)) {
3794 if (stat(entry->mnt_dir, &fsb) == 0
3795 && fsb.st_dev == stb.st_dev)
3797 /* found the filesystem */
3799 if (hasmntopt(entry, MNTOPT_NOSUID))
3801 if (hasmntopt(entry, MNTOPT_NOEXEC))
3804 } /* A single fs may well fail its stat(). */
3809 # endif /* getmntent+hasmntopt */
3812 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3814 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3816 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3817 return ((!check_okay) || on_nosuid || on_noexec);
3819 #endif /* IAMSUID */
3822 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3823 int fdscript, int suidscript)
3828 #endif /* IAMSUID */
3830 /* do we need to emulate setuid on scripts? */
3832 /* This code is for those BSD systems that have setuid #! scripts disabled
3833 * in the kernel because of a security problem. Merely defining DOSUID
3834 * in perl will not fix that problem, but if you have disabled setuid
3835 * scripts in the kernel, this will attempt to emulate setuid and setgid
3836 * on scripts that have those now-otherwise-useless bits set. The setuid
3837 * root version must be called suidperl or sperlN.NNN. If regular perl
3838 * discovers that it has opened a setuid script, it calls suidperl with
3839 * the same argv that it had. If suidperl finds that the script it has
3840 * just opened is NOT setuid root, it sets the effective uid back to the
3841 * uid. We don't just make perl setuid root because that loses the
3842 * effective uid we had before invoking perl, if it was different from the
3845 * Description/comments above do not match current workings:
3846 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3847 * suidperl called with script open and name changed to /dev/fd/N/X;
3848 * suidperl croaks if script is not setuid;
3849 * making perl setuid would be a huge security risk (and yes, that
3850 * would lose any euid we might have had).
3852 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3853 * be defined in suidperl only. suidperl must be setuid root. The
3854 * Configure script will set this up for you if you want it.
3860 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3861 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3862 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3864 const char *linestr;
3868 if (fdscript < 0 || suidscript != 1)
3869 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3871 * Since the script is opened by perl, not suidperl, some of these
3872 * checks are superfluous. Leaving them in probably does not lower
3876 * Do checks even for systems with no HAS_SETREUID.
3877 * We used to swap, then re-swap UIDs with
3879 if (setreuid(PL_euid,PL_uid) < 0
3880 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3881 Perl_croak(aTHX_ "Can't swap uid and euid");
3884 if (setreuid(PL_uid,PL_euid) < 0
3885 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3886 Perl_croak(aTHX_ "Can't reswap uid and euid");
3890 /* On this access check to make sure the directories are readable,
3891 * there is actually a small window that the user could use to make
3892 * filename point to an accessible directory. So there is a faint
3893 * chance that someone could execute a setuid script down in a
3894 * non-accessible directory. I don't know what to do about that.
3895 * But I don't think it's too important. The manual lies when
3896 * it says access() is useful in setuid programs.
3898 * So, access() is pretty useless... but not harmful... do anyway.
3900 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3901 Perl_croak(aTHX_ "Can't access() script\n");
3904 /* If we can swap euid and uid, then we can determine access rights
3905 * with a simple stat of the file, and then compare device and
3906 * inode to make sure we did stat() on the same file we opened.
3907 * Then we just have to make sure he or she can execute it.
3910 * As the script is opened by perl, not suidperl, we do not need to
3911 * care much about access rights.
3913 * The 'script changed' check is needed, or we can get lied to
3914 * about $0 with e.g.
3915 * suidperl /dev/fd/4//bin/x 4<setuidscript
3916 * Without HAS_SETREUID, is it safe to stat() as root?
3918 * Are there any operating systems that pass /dev/fd/xxx for setuid
3919 * scripts, as suggested/described in perlsec(1)? Surely they do not
3920 * pass the script name as we do, so the "script changed" test would
3921 * fail for them... but we never get here with
3922 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3924 * This is one place where we must "lie" about return status: not
3925 * say if the stat() failed. We are doing this as root, and could
3926 * be tricked into reporting existence or not of files that the
3927 * "plain" user cannot even see.
3931 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3932 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3933 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3934 Perl_croak(aTHX_ "Setuid script changed\n");
3938 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3939 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3942 * We used to do this check as the "plain" user (after swapping
3943 * UIDs). But the check for nosuid and noexec filesystem is needed,
3944 * and should be done even without HAS_SETREUID. (Maybe those
3945 * operating systems do not have such mount options anyway...)
3946 * Seems safe enough to do as root.
3948 #if !defined(NO_NOSUID_CHECK)
3949 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3950 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3953 #endif /* IAMSUID */
3955 if (!S_ISREG(PL_statbuf.st_mode)) {
3956 Perl_croak(aTHX_ "Setuid script not plain file\n");
3958 if (PL_statbuf.st_mode & S_IWOTH)
3959 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3960 PL_doswitches = FALSE; /* -s is insecure in suid */
3961 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3962 CopLINE_inc(PL_curcop);
3963 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3964 Perl_croak(aTHX_ "No #! line");
3965 linestr = SvPV_nolen_const(PL_linestr);
3966 /* required even on Sys V */
3967 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3968 Perl_croak(aTHX_ "No #! line");
3972 /* Sanity check on line length */
3973 s_end = s + strlen(s);
3974 if (s_end == s || (s_end - s) > 4000)
3975 Perl_croak(aTHX_ "Very long #! line");
3976 /* Allow more than a single space after #! */
3977 while (isSPACE(*s)) s++;
3978 /* Sanity check on buffer end */
3979 while ((*s) && !isSPACE(*s)) s++;
3980 for (s2 = s; (s2 > linestr &&
3981 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3982 || s2[-1] == '-')); s2--) ;
3983 /* Sanity check on buffer start */
3984 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3985 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3986 Perl_croak(aTHX_ "Not a perl script");
3987 while (*s == ' ' || *s == '\t') s++;
3989 * #! arg must be what we saw above. They can invoke it by
3990 * mentioning suidperl explicitly, but they may not add any strange
3991 * arguments beyond what #! says if they do invoke suidperl that way.
3994 * The way validarg was set up, we rely on the kernel to start
3995 * scripts with argv[1] set to contain all #! line switches (the
3999 * Check that we got all the arguments listed in the #! line (not
4000 * just that there are no extraneous arguments). Might not matter
4001 * much, as switches from #! line seem to be acted upon (also), and
4002 * so may be checked and trapped in perl. But, security checks must
4003 * be done in suidperl and not deferred to perl. Note that suidperl
4004 * does not get around to parsing (and checking) the switches on
4005 * the #! line (but execs perl sooner).
4006 * Allow (require) a trailing newline (which may be of two
4007 * characters on some architectures?) (but no other trailing
4010 len = strlen(validarg);
4011 if (strEQ(validarg," PHOOEY ") ||
4012 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4013 !((s_end - s) == len+1
4014 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4015 Perl_croak(aTHX_ "Args must match #! line");
4019 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4020 PL_euid == PL_statbuf.st_uid)
4022 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4023 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4024 #endif /* IAMSUID */
4027 PL_euid) { /* oops, we're not the setuid root perl */
4029 * When root runs a setuid script, we do not go through the same
4030 * steps of execing sperl and then perl with fd scripts, but
4031 * simply set up UIDs within the same perl invocation; so do
4032 * not have the same checks (on options, whatever) that we have
4033 * for plain users. No problem really: would have to be a script
4034 * that does not actually work for plain users; and if root is
4035 * foolish and can be persuaded to run such an unsafe script, he
4036 * might run also non-setuid ones, and deserves what he gets.
4038 * Or, we might drop the PL_euid check above (and rely just on
4039 * fdscript to avoid loops), and do the execs
4045 * Pass fd script to suidperl.
4046 * Exec suidperl, substituting fd script for scriptname.
4047 * Pass script name as "subdir" of fd, which perl will grok;
4048 * in fact will use that to distinguish this from "normal"
4049 * usage, see comments above.
4051 PerlIO_rewind(PL_rsfp);
4052 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4053 /* PSz 27 Feb 04 Sanity checks on scriptname */
4054 if ((!scriptname) || (!*scriptname) ) {
4055 Perl_croak(aTHX_ "No setuid script name\n");
4057 if (*scriptname == '-') {
4058 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4059 /* Or we might confuse it with an option when replacing
4060 * name in argument list, below (though we do pointer, not
4061 * string, comparisons).
4064 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4065 if (!PL_origargv[which]) {
4066 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4068 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4069 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4070 #if defined(HAS_FCNTL) && defined(F_SETFD)
4071 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4074 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4075 (int)PERL_REVISION, (int)PERL_VERSION,
4076 (int)PERL_SUBVERSION), PL_origargv);
4078 #endif /* IAMSUID */
4079 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4082 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4084 * This seems back to front: we try HAS_SETEGID first; if not available
4085 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4086 * in the sense that we only want to set EGID; but are there any machines
4087 * with either of the latter, but not the former? Same with UID, later.
4090 (void)setegid(PL_statbuf.st_gid);
4093 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4095 #ifdef HAS_SETRESGID
4096 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4098 PerlProc_setgid(PL_statbuf.st_gid);
4102 if (PerlProc_getegid() != PL_statbuf.st_gid)
4103 Perl_croak(aTHX_ "Can't do setegid!\n");
4105 if (PL_statbuf.st_mode & S_ISUID) {
4106 if (PL_statbuf.st_uid != PL_euid)
4108 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4111 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4113 #ifdef HAS_SETRESUID
4114 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4116 PerlProc_setuid(PL_statbuf.st_uid);
4120 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4121 Perl_croak(aTHX_ "Can't do seteuid!\n");
4123 else if (PL_uid) { /* oops, mustn't run as root */
4125 (void)seteuid((Uid_t)PL_uid);
4128 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4130 #ifdef HAS_SETRESUID
4131 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4133 PerlProc_setuid((Uid_t)PL_uid);
4137 if (PerlProc_geteuid() != PL_uid)
4138 Perl_croak(aTHX_ "Can't do seteuid!\n");
4141 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4142 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4145 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4146 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4147 else if (fdscript < 0 || suidscript != 1)
4148 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4149 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4151 /* PSz 16 Sep 03 Keep neat error message */
4152 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4155 /* We absolutely must clear out any saved ids here, so we */
4156 /* exec the real perl, substituting fd script for scriptname. */
4157 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4159 * It might be thought that using setresgid and/or setresuid (changed to
4160 * set the saved IDs) above might obviate the need to exec, and we could
4161 * go on to "do the perl thing".
4163 * Is there such a thing as "saved GID", and is that set for setuid (but
4164 * not setgid) execution like suidperl? Without exec, it would not be
4165 * cleared for setuid (but not setgid) scripts (or might need a dummy
4168 * We need suidperl to do the exact same argument checking that perl
4169 * does. Thus it cannot be very small; while it could be significantly
4170 * smaller, it is safer (simpler?) to make it essentially the same
4171 * binary as perl (but they are not identical). - Maybe could defer that
4172 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4173 * but prefer to do thorough checks in suidperl itself. Such deferral
4174 * would make suidperl security rely on perl, a design no-no.
4176 * Setuid things should be short and simple, thus easy to understand and
4177 * verify. They should do their "own thing", without influence by
4178 * attackers. It may help if their internal execution flow is fixed,
4179 * regardless of platform: it may be best to exec anyway.
4181 * Suidperl should at least be conceptually simple: a wrapper only,
4182 * never to do any real perl. Maybe we should put
4184 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4186 * into the perly bits.
4188 PerlIO_rewind(PL_rsfp);
4189 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4191 * Keep original arguments: suidperl already has fd script.
4193 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4194 /* if (!PL_origargv[which]) { */
4195 /* errno = EPERM; */
4196 /* Perl_croak(aTHX_ "Permission denied\n"); */
4198 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4199 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4200 #if defined(HAS_FCNTL) && defined(F_SETFD)
4201 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4204 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4205 (int)PERL_REVISION, (int)PERL_VERSION,
4206 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4208 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4209 #endif /* IAMSUID */
4211 PERL_UNUSED_ARG(fdscript);
4212 PERL_UNUSED_ARG(suidscript);
4213 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4214 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4215 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4216 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4218 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4221 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4222 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4223 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4224 /* not set-id, must be wrapped */
4227 PERL_UNUSED_ARG(validarg);
4228 PERL_UNUSED_ARG(scriptname);
4232 S_find_beginning(pTHX)
4236 register const char *s2;
4237 #ifdef MACOS_TRADITIONAL
4241 /* skip forward in input to the real script? */
4243 #ifdef MACOS_TRADITIONAL
4244 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4246 while (PL_doextract || gMacPerl_AlwaysExtract) {
4247 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4248 if (!gMacPerl_AlwaysExtract)
4249 Perl_croak(aTHX_ "No Perl script found in input\n");
4251 if (PL_doextract) /* require explicit override ? */
4252 if (!OverrideExtract(PL_origfilename))
4253 Perl_croak(aTHX_ "User aborted script\n");
4255 PL_doextract = FALSE;
4257 /* Pater peccavi, file does not have #! */
4258 PerlIO_rewind(PL_rsfp);
4263 while (PL_doextract) {
4264 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4265 Perl_croak(aTHX_ "No Perl script found in input\n");
4268 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4269 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4270 PL_doextract = FALSE;
4271 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4273 while (*s == ' ' || *s == '\t') s++;
4275 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4276 || s2[-1] == '_') s2--;
4277 if (strnEQ(s2-4,"perl",4))
4278 while ((s = moreswitches(s)))
4281 #ifdef MACOS_TRADITIONAL
4282 /* We are always searching for the #!perl line in MacPerl,
4283 * so if we find it, still keep the line count correct
4284 * by counting lines we already skipped over
4286 for (; maclines > 0 ; maclines--)
4287 PerlIO_ungetc(PL_rsfp, '\n');
4291 /* gMacPerl_AlwaysExtract is false in MPW tool */
4292 } else if (gMacPerl_AlwaysExtract) {
4304 PL_uid = PerlProc_getuid();
4305 PL_euid = PerlProc_geteuid();
4306 PL_gid = PerlProc_getgid();
4307 PL_egid = PerlProc_getegid();
4309 PL_uid |= PL_gid << 16;
4310 PL_euid |= PL_egid << 16;
4312 /* Should not happen: */
4313 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4314 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4317 * Should go by suidscript, not uid!=euid: why disallow
4318 * system("ls") in scripts run from setuid things?
4319 * Or, is this run before we check arguments and set suidscript?
4320 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4321 * (We never have suidscript, can we be sure to have fdscript?)
4322 * Or must then go by UID checks? See comments in forbid_setid also.
4326 /* This is used very early in the lifetime of the program,
4327 * before even the options are parsed, so PL_tainting has
4328 * not been initialized properly. */
4330 Perl_doing_taint(int argc, char *argv[], char *envp[])
4332 #ifndef PERL_IMPLICIT_SYS
4333 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4334 * before we have an interpreter-- and the whole point of this
4335 * function is to be called at such an early stage. If you are on
4336 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4337 * "tainted because running with altered effective ids', you'll
4338 * have to add your own checks somewhere in here. The two most
4339 * known samples of 'implicitness' are Win32 and NetWare, neither
4340 * of which has much of concept of 'uids'. */
4341 int uid = PerlProc_getuid();
4342 int euid = PerlProc_geteuid();
4343 int gid = PerlProc_getgid();
4344 int egid = PerlProc_getegid();
4351 if (uid && (euid != uid || egid != gid))
4353 #endif /* !PERL_IMPLICIT_SYS */
4354 /* This is a really primitive check; environment gets ignored only
4355 * if -T are the first chars together; otherwise one gets
4356 * "Too late" message. */
4357 if ( argc > 1 && argv[1][0] == '-'
4358 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4363 /* Passing the flag as a single char rather than a string is a slight space
4364 optimisation. The only message that isn't /^-.$/ is
4365 "program input from stdin", which is substituted in place of '\0', which
4366 could never be a command line flag. */
4368 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4371 char string[3] = "-x";
4372 const char *message = "program input from stdin";
4379 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4380 if (PL_euid != PL_uid)
4381 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4382 if (PL_egid != PL_gid)
4383 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4384 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4386 * Checks for UID/GID above "wrong": why disallow
4387 * perl -e 'print "Hello\n"'
4388 * from within setuid things?? Simply drop them: replaced by
4389 * fdscript/suidscript and #ifdef IAMSUID checks below.
4391 * This may be too late for command-line switches. Will catch those on
4392 * the #! line, after finding the script name and setting up
4393 * fdscript/suidscript. Note that suidperl does not get around to
4394 * parsing (and checking) the switches on the #! line, but checks that
4395 * the two sets are identical.
4397 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4398 * instead, or would that be "too late"? (We never have suidscript, can
4399 * we be sure to have fdscript?)
4401 * Catch things with suidscript (in descendant of suidperl), even with
4402 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4403 * below; but I am paranoid.
4405 * Also see comments about root running a setuid script, elsewhere.
4407 if (suidscript >= 0)
4408 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4410 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4411 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4412 #endif /* IAMSUID */
4416 Perl_init_debugger(pTHX)
4419 HV * const ostash = PL_curstash;
4421 PL_curstash = PL_debstash;
4422 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4424 AvREAL_off(PL_dbargs);
4425 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4426 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4427 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4428 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4429 sv_setiv(PL_DBsingle, 0);
4430 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4431 sv_setiv(PL_DBtrace, 0);
4432 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4433 sv_setiv(PL_DBsignal, 0);
4434 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4435 sv_setiv(PL_DBassertion, 0);
4436 PL_curstash = ostash;
4439 #ifndef STRESS_REALLOC
4440 #define REASONABLE(size) (size)
4442 #define REASONABLE(size) (1) /* unreasonable */
4446 Perl_init_stacks(pTHX)
4449 /* start with 128-item stack and 8K cxstack */
4450 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4451 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4452 PL_curstackinfo->si_type = PERLSI_MAIN;
4453 PL_curstack = PL_curstackinfo->si_stack;
4454 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4456 PL_stack_base = AvARRAY(PL_curstack);
4457 PL_stack_sp = PL_stack_base;
4458 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4460 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4463 PL_tmps_max = REASONABLE(128);
4465 Newx(PL_markstack,REASONABLE(32),I32);
4466 PL_markstack_ptr = PL_markstack;
4467 PL_markstack_max = PL_markstack + REASONABLE(32);
4471 Newx(PL_scopestack,REASONABLE(32),I32);
4472 PL_scopestack_ix = 0;
4473 PL_scopestack_max = REASONABLE(32);
4475 Newx(PL_savestack,REASONABLE(128),ANY);
4476 PL_savestack_ix = 0;
4477 PL_savestack_max = REASONABLE(128);
4486 while (PL_curstackinfo->si_next)
4487 PL_curstackinfo = PL_curstackinfo->si_next;
4488 while (PL_curstackinfo) {
4489 PERL_SI *p = PL_curstackinfo->si_prev;
4490 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4491 Safefree(PL_curstackinfo->si_cxstack);
4492 Safefree(PL_curstackinfo);
4493 PL_curstackinfo = p;
4495 Safefree(PL_tmps_stack);
4496 Safefree(PL_markstack);
4497 Safefree(PL_scopestack);
4498 Safefree(PL_savestack);
4508 lex_start(PL_linestr);
4510 PL_subname = newSVpvs("main");
4514 S_init_predump_symbols(pTHX)
4520 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4521 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4522 GvMULTI_on(PL_stdingv);
4523 io = GvIOp(PL_stdingv);
4524 IoTYPE(io) = IoTYPE_RDONLY;
4525 IoIFP(io) = PerlIO_stdin();
4526 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4528 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4530 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4533 IoTYPE(io) = IoTYPE_WRONLY;
4534 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4536 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4538 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4540 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4541 GvMULTI_on(PL_stderrgv);
4542 io = GvIOp(PL_stderrgv);
4543 IoTYPE(io) = IoTYPE_WRONLY;
4544 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4545 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4547 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4549 PL_statname = newSV(0); /* last filename we did stat on */
4551 Safefree(PL_osname);
4552 PL_osname = savepv(OSNAME);
4556 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4559 argc--,argv++; /* skip name of script */
4560 if (PL_doswitches) {
4561 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4565 if (argv[0][1] == '-' && !argv[0][2]) {
4569 if ((s = strchr(argv[0], '='))) {
4570 const char *const start_name = argv[0] + 1;
4571 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4572 TRUE, SVt_PV)), s + 1);
4575 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4578 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4579 GvMULTI_on(PL_argvgv);
4580 (void)gv_AVadd(PL_argvgv);
4581 av_clear(GvAVn(PL_argvgv));
4582 for (; argc > 0; argc--,argv++) {
4583 SV * const sv = newSVpv(argv[0],0);
4584 av_push(GvAVn(PL_argvgv),sv);
4585 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4586 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4589 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4590 (void)sv_utf8_decode(sv);
4596 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4601 PL_toptarget = newSV(0);
4602 sv_upgrade(PL_toptarget, SVt_PVFM);
4603 sv_setpvn(PL_toptarget, "", 0);
4604 PL_bodytarget = newSV(0);
4605 sv_upgrade(PL_bodytarget, SVt_PVFM);
4606 sv_setpvn(PL_bodytarget, "", 0);
4607 PL_formtarget = PL_bodytarget;
4611 init_argv_symbols(argc,argv);
4613 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4614 #ifdef MACOS_TRADITIONAL
4615 /* $0 is not majick on a Mac */
4616 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4618 sv_setpv(GvSV(tmpgv),PL_origfilename);
4619 magicname("0", "0", 1);
4622 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4624 GvMULTI_on(PL_envgv);
4625 hv = GvHVn(PL_envgv);
4626 hv_magic(hv, NULL, PERL_MAGIC_env);
4628 #ifdef USE_ENVIRON_ARRAY
4629 /* Note that if the supplied env parameter is actually a copy
4630 of the global environ then it may now point to free'd memory
4631 if the environment has been modified since. To avoid this
4632 problem we treat env==NULL as meaning 'use the default'
4637 # ifdef USE_ITHREADS
4638 && PL_curinterp == aTHX
4645 char** origenv = environ;
4648 for (; *env; env++) {
4649 if (!(s = strchr(*env,'=')) || s == *env)
4651 #if defined(MSDOS) && !defined(DJGPP)
4656 sv = newSVpv(s+1, 0);
4657 (void)hv_store(hv, *env, s - *env, sv, 0);
4660 if (origenv != environ) {
4661 /* realloc has shifted us */
4662 env = (env - origenv) + environ;
4667 #endif /* USE_ENVIRON_ARRAY */
4668 #endif /* !PERL_MICRO */
4671 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4672 SvREADONLY_off(GvSV(tmpgv));
4673 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4674 SvREADONLY_on(GvSV(tmpgv));
4676 #ifdef THREADS_HAVE_PIDS
4677 PL_ppid = (IV)getppid();
4680 /* touch @F array to prevent spurious warnings 20020415 MJD */
4682 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4684 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4685 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4686 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4690 S_init_perllib(pTHX)
4696 s = PerlEnv_getenv("PERL5LIB");
4698 * It isn't possible to delete an environment variable with
4699 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4700 * case we treat PERL5LIB as undefined if it has a zero-length value.
4702 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4703 if (s && *s != '\0')
4707 incpush(s, TRUE, TRUE, TRUE, FALSE);
4709 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4711 /* Treat PERL5?LIB as a possible search list logical name -- the
4712 * "natural" VMS idiom for a Unix path string. We allow each
4713 * element to be a set of |-separated directories for compatibility.
4717 if (my_trnlnm("PERL5LIB",buf,0))
4718 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4720 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4724 /* Use the ~-expanded versions of APPLLIB (undocumented),
4725 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4728 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4732 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4734 #ifdef MACOS_TRADITIONAL
4737 SV * privdir = newSV(0);
4738 char * macperl = PerlEnv_getenv("MACPERL");
4743 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4744 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4745 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4746 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4747 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4748 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4750 SvREFCNT_dec(privdir);
4753 incpush(":", FALSE, FALSE, TRUE, FALSE);
4756 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4759 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4761 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4765 /* sitearch is always relative to sitelib on Windows for
4766 * DLL-based path intuition to work correctly */
4767 # if !defined(WIN32)
4768 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4774 /* this picks up sitearch as well */
4775 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4777 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4781 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4782 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4785 #ifdef PERL_VENDORARCH_EXP
4786 /* vendorarch is always relative to vendorlib on Windows for
4787 * DLL-based path intuition to work correctly */
4788 # if !defined(WIN32)
4789 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4793 #ifdef PERL_VENDORLIB_EXP
4795 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4797 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4801 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4802 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4805 #ifdef PERL_OTHERLIBDIRS
4806 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4810 incpush(".", FALSE, FALSE, TRUE, FALSE);
4811 #endif /* MACOS_TRADITIONAL */
4814 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4815 # define PERLLIB_SEP ';'
4818 # define PERLLIB_SEP '|'
4820 # if defined(MACOS_TRADITIONAL)
4821 # define PERLLIB_SEP ','
4823 # define PERLLIB_SEP ':'
4827 #ifndef PERLLIB_MANGLE
4828 # define PERLLIB_MANGLE(s,n) (s)
4831 /* Push a directory onto @INC if it exists.
4832 Generate a new SV if we do this, to save needing to copy the SV we push
4835 S_incpush_if_exists(pTHX_ SV *dir)
4839 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4840 S_ISDIR(tmpstatbuf.st_mode)) {
4841 av_push(GvAVn(PL_incgv), dir);
4848 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4853 const char *p = dir;
4858 if (addsubdirs || addoldvers) {
4862 /* Break at all separators */
4864 SV *libdir = newSV(0);
4867 /* skip any consecutive separators */
4869 while ( *p == PERLLIB_SEP ) {
4870 /* Uncomment the next line for PATH semantics */
4871 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4876 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4877 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4882 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4883 p = NULL; /* break out */
4885 #ifdef MACOS_TRADITIONAL
4886 if (!strchr(SvPVX(libdir), ':')) {
4889 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4891 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4892 sv_catpvs(libdir, ":");
4895 /* Do the if() outside the #ifdef to avoid warnings about an unused
4898 #ifdef PERL_RELOCATABLE_INC
4900 * Relocatable include entries are marked with a leading .../
4903 * 0: Remove that leading ".../"
4904 * 1: Remove trailing executable name (anything after the last '/')
4905 * from the perl path to give a perl prefix
4907 * While the @INC element starts "../" and the prefix ends with a real
4908 * directory (ie not . or ..) chop that real directory off the prefix
4909 * and the leading "../" from the @INC element. ie a logical "../"
4911 * Finally concatenate the prefix and the remainder of the @INC element
4912 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4913 * generates /usr/local/lib/perl5
4915 const char *libpath = SvPVX(libdir);
4916 STRLEN libpath_len = SvCUR(libdir);
4917 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4919 SV * const caret_X = get_sv("\030", 0);
4920 /* Going to use the SV just as a scratch buffer holding a C
4926 /* $^X is *the* source of taint if tainting is on, hence
4927 SvPOK() won't be true. */
4929 assert(SvPOKp(caret_X));
4930 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4931 /* Firstly take off the leading .../
4932 If all else fail we'll do the paths relative to the current
4934 sv_chop(libdir, libpath + 4);
4935 /* Don't use SvPV as we're intentionally bypassing taining,
4936 mortal copies that the mg_get of tainting creates, and
4937 corruption that seems to come via the save stack.
4938 I guess that the save stack isn't correctly set up yet. */
4939 libpath = SvPVX(libdir);
4940 libpath_len = SvCUR(libdir);
4942 /* This would work more efficiently with memrchr, but as it's
4943 only a GNU extension we'd need to probe for it and
4944 implement our own. Not hard, but maybe not worth it? */
4946 prefix = SvPVX(prefix_sv);
4947 lastslash = strrchr(prefix, '/');
4949 /* First time in with the *lastslash = '\0' we just wipe off
4950 the trailing /perl from (say) /usr/foo/bin/perl
4954 while ((*lastslash = '\0'), /* Do that, come what may. */
4955 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4956 && (lastslash = strrchr(prefix, '/')))) {
4957 if (lastslash[1] == '\0'
4958 || (lastslash[1] == '.'
4959 && (lastslash[2] == '/' /* ends "/." */
4960 || (lastslash[2] == '/'
4961 && lastslash[3] == '/' /* or "/.." */
4963 /* Prefix ends "/" or "/." or "/..", any of which
4964 are fishy, so don't do any more logical cleanup.
4968 /* Remove leading "../" from path */
4971 /* Next iteration round the loop removes the last
4972 directory name from prefix by writing a '\0' in
4973 the while clause. */
4975 /* prefix has been terminated with a '\0' to the correct
4976 length. libpath points somewhere into the libdir SV.
4977 We need to join the 2 with '/' and drop the result into
4979 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4980 SvREFCNT_dec(libdir);
4981 /* And this is the new libdir. */
4984 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4985 /* Need to taint reloccated paths if running set ID */
4986 SvTAINTED_on(libdir);
4989 SvREFCNT_dec(prefix_sv);
4994 * BEFORE pushing libdir onto @INC we may first push version- and
4995 * archname-specific sub-directories.
4997 if (addsubdirs || addoldvers) {
4998 #ifdef PERL_INC_VERSION_LIST
4999 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5000 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5001 const char * const *incver;
5007 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5009 while (unix[len-1] == '/') len--; /* Cosmetic */
5010 sv_usepvn(libdir,unix,len);
5013 PerlIO_printf(Perl_error_log,
5014 "Failed to unixify @INC element \"%s\"\n",
5018 #ifdef MACOS_TRADITIONAL
5019 #define PERL_AV_SUFFIX_FMT ""
5020 #define PERL_ARCH_FMT "%s:"
5021 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5023 #define PERL_AV_SUFFIX_FMT "/"
5024 #define PERL_ARCH_FMT "/%s"
5025 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5027 /* .../version/archname if -d .../version/archname */
5028 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5030 (int)PERL_REVISION, (int)PERL_VERSION,
5031 (int)PERL_SUBVERSION, ARCHNAME);
5032 subdir = S_incpush_if_exists(aTHX_ subdir);
5034 /* .../version if -d .../version */
5035 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5036 (int)PERL_REVISION, (int)PERL_VERSION,
5037 (int)PERL_SUBVERSION);
5038 subdir = S_incpush_if_exists(aTHX_ subdir);
5040 /* .../archname if -d .../archname */
5041 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5042 subdir = S_incpush_if_exists(aTHX_ subdir);
5046 #ifdef PERL_INC_VERSION_LIST
5048 for (incver = incverlist; *incver; incver++) {
5049 /* .../xxx if -d .../xxx */
5050 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5051 subdir = S_incpush_if_exists(aTHX_ subdir);
5057 /* finally push this lib directory on the end of @INC */
5058 av_push(GvAVn(PL_incgv), libdir);
5061 assert (SvREFCNT(subdir) == 1);
5062 SvREFCNT_dec(subdir);
5068 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5072 const line_t oldline = CopLINE(PL_curcop);
5078 while (av_len(paramList) >= 0) {
5079 cv = (CV*)av_shift(paramList);
5081 if (paramList == PL_beginav) {
5082 /* save PL_beginav for compiler */
5083 if (! PL_beginav_save)
5084 PL_beginav_save = newAV();
5085 av_push(PL_beginav_save, (SV*)cv);
5087 else if (paramList == PL_checkav) {
5088 /* save PL_checkav for compiler */
5089 if (! PL_checkav_save)
5090 PL_checkav_save = newAV();
5091 av_push(PL_checkav_save, (SV*)cv);
5101 (void)SvPV_const(atsv, len);
5103 PL_curcop = &PL_compiling;
5104 CopLINE_set(PL_curcop, oldline);
5105 if (paramList == PL_beginav)
5106 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5108 Perl_sv_catpvf(aTHX_ atsv,
5109 "%s failed--call queue aborted",
5110 paramList == PL_checkav ? "CHECK"
5111 : paramList == PL_initav ? "INIT"
5113 while (PL_scopestack_ix > oldscope)
5116 Perl_croak(aTHX_ "%"SVf"", atsv);
5123 /* my_exit() was called */
5124 while (PL_scopestack_ix > oldscope)
5127 PL_curstash = PL_defstash;
5128 PL_curcop = &PL_compiling;
5129 CopLINE_set(PL_curcop, oldline);
5131 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5132 if (paramList == PL_beginav)
5133 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5135 Perl_croak(aTHX_ "%s failed--call queue aborted",
5136 paramList == PL_checkav ? "CHECK"
5137 : paramList == PL_initav ? "INIT"
5144 PL_curcop = &PL_compiling;
5145 CopLINE_set(PL_curcop, oldline);
5148 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5157 S_call_list_body(pTHX_ CV *cv)
5160 PUSHMARK(PL_stack_sp);
5161 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5166 Perl_my_exit(pTHX_ U32 status)
5169 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5170 thr, (unsigned long) status));
5179 STATUS_EXIT_SET(status);
5186 Perl_my_failure_exit(pTHX)
5190 /* We have been called to fall on our sword. The desired exit code
5191 * should be already set in STATUS_UNIX, but could be shifted over
5192 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5195 * If an error code has not been set, then force the issue.
5197 if (MY_POSIX_EXIT) {
5199 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5200 * the exit code when there isn't an error.
5203 if (STATUS_UNIX == 0)
5204 STATUS_UNIX_EXIT_SET(255);
5206 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5208 /* The exit code could have been set by $? or vmsish which
5209 * means that it may not be fatal. So convert
5210 * success/warning codes to fatal.
5212 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5213 STATUS_UNIX_EXIT_SET(255);
5217 /* Traditionally Perl on VMS always expects a Fatal Error. */
5218 if (vaxc$errno & 1) {
5220 /* So force success status to failure */
5221 if (STATUS_NATIVE & 1)
5226 STATUS_UNIX = EINTR; /* In case something cares */
5231 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5233 /* Encode the severity code */
5234 severity = STATUS_NATIVE & STS$M_SEVERITY;
5235 STATUS_UNIX = (severity ? severity : 1) << 8;
5237 /* Perl expects this to be a fatal error */
5238 if (severity != STS$K_SEVERE)
5247 STATUS_UNIX_SET(errno);
5249 exitstatus = STATUS_UNIX >> 8;
5250 if (exitstatus & 255)
5251 STATUS_UNIX_SET(exitstatus);
5253 STATUS_UNIX_SET(255);
5260 S_my_exit_jump(pTHX)
5265 SvREFCNT_dec(PL_e_script);
5269 POPSTACK_TO(PL_mainstack);
5277 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5280 const char * const p = SvPVX_const(PL_e_script);
5281 const char *nl = strchr(p, '\n');
5283 PERL_UNUSED_ARG(idx);
5284 PERL_UNUSED_ARG(maxlen);
5286 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5288 filter_del(read_e_script);
5291 sv_catpvn(buf_sv, p, nl-p);
5292 sv_chop(PL_e_script, nl);
5298 * c-indentation-style: bsd
5300 * indent-tabs-mode: t
5303 * ex: set ts=8 sts=4 sw=4 noet: