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);
2180 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2184 PL_xmlfp = PerlIO_stdout();
2186 PL_xmlfp = PerlIO_open(s, "w");
2188 Perl_croak(aTHX_ "Can't open %s", s);
2190 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2192 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2193 PL_madskills = atoi(s);
2194 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2200 /* now parse the script */
2202 SETERRNO(0,SS_NORMAL);
2204 #ifdef MACOS_TRADITIONAL
2205 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2207 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2209 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2210 MacPerl_MPWFileName(PL_origfilename));
2214 if (yyparse() || PL_error_count) {
2216 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2218 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2223 CopLINE_set(PL_curcop, 0);
2224 PL_curstash = PL_defstash;
2225 PL_preprocess = FALSE;
2227 SvREFCNT_dec(PL_e_script);
2235 SAVECOPFILE(PL_curcop);
2236 SAVECOPLINE(PL_curcop);
2237 gv_check(PL_defstash);
2244 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2245 dump_mstats("after compilation:");
2254 =for apidoc perl_run
2256 Tells a Perl interpreter to run. See L<perlembed>.
2269 PERL_UNUSED_CONTEXT;
2271 oldscope = PL_scopestack_ix;
2279 cxstack_ix = -1; /* start context stack again */
2281 case 0: /* normal completion */
2285 case 2: /* my_exit() */
2286 while (PL_scopestack_ix > oldscope)
2289 PL_curstash = PL_defstash;
2290 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2291 PL_endav && !PL_minus_c)
2292 call_list(oldscope, PL_endav);
2294 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2295 dump_mstats("after execution: ");
2301 POPSTACK_TO(PL_mainstack);
2304 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2316 S_run_body(pTHX_ I32 oldscope)
2319 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2320 PL_sawampersand ? "Enabling" : "Omitting"));
2322 if (!PL_restartop) {
2326 exit(0); /* less likely to core dump than my_exit(0) */
2329 DEBUG_x(dump_all());
2332 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2334 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2338 #ifdef MACOS_TRADITIONAL
2339 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2340 (gMacPerl_ErrorFormat ? "# " : ""),
2341 MacPerl_MPWFileName(PL_origfilename));
2343 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2347 if (PERLDB_SINGLE && PL_DBsingle)
2348 sv_setiv(PL_DBsingle, 1);
2350 call_list(oldscope, PL_initav);
2356 PL_op = PL_restartop;
2360 else if (PL_main_start) {
2361 CvDEPTH(PL_main_cv) = 1;
2362 PL_op = PL_main_start;
2370 =head1 SV Manipulation Functions
2372 =for apidoc p||get_sv
2374 Returns the SV of the specified Perl scalar. If C<create> is set and the
2375 Perl variable does not exist then it will be created. If C<create> is not
2376 set and the variable does not exist then NULL is returned.
2382 Perl_get_sv(pTHX_ const char *name, I32 create)
2385 gv = gv_fetchpv(name, create, SVt_PV);
2392 =head1 Array Manipulation Functions
2394 =for apidoc p||get_av
2396 Returns the AV of the specified Perl array. If C<create> is set and the
2397 Perl variable does not exist then it will be created. If C<create> is not
2398 set and the variable does not exist then NULL is returned.
2404 Perl_get_av(pTHX_ const char *name, I32 create)
2406 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2415 =head1 Hash Manipulation Functions
2417 =for apidoc p||get_hv
2419 Returns the HV of the specified Perl hash. If C<create> is set and the
2420 Perl variable does not exist then it will be created. If C<create> is not
2421 set and the variable does not exist then NULL is returned.
2427 Perl_get_hv(pTHX_ const char *name, I32 create)
2429 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2438 =head1 CV Manipulation Functions
2440 =for apidoc p||get_cv
2442 Returns the CV of the specified Perl subroutine. If C<create> is set and
2443 the Perl subroutine does not exist then it will be declared (which has the
2444 same effect as saying C<sub name;>). If C<create> is not set and the
2445 subroutine does not exist then NULL is returned.
2451 Perl_get_cv(pTHX_ const char *name, I32 create)
2453 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2454 /* XXX unsafe for threads if eval_owner isn't held */
2455 /* XXX this is probably not what they think they're getting.
2456 * It has the same effect as "sub name;", i.e. just a forward
2458 if (create && !GvCVu(gv))
2459 return newSUB(start_subparse(FALSE, 0),
2460 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2467 /* Be sure to refetch the stack pointer after calling these routines. */
2471 =head1 Callback Functions
2473 =for apidoc p||call_argv
2475 Performs a callback to the specified Perl sub. See L<perlcall>.
2481 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2483 /* See G_* flags in cop.h */
2484 /* null terminated arg list */
2492 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2497 return call_pv(sub_name, flags);
2501 =for apidoc p||call_pv
2503 Performs a callback to the specified Perl sub. See L<perlcall>.
2509 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2510 /* name of the subroutine */
2511 /* See G_* flags in cop.h */
2513 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2517 =for apidoc p||call_method
2519 Performs a callback to the specified Perl method. The blessed object must
2520 be on the stack. See L<perlcall>.
2526 Perl_call_method(pTHX_ const char *methname, I32 flags)
2527 /* name of the subroutine */
2528 /* See G_* flags in cop.h */
2530 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2533 /* May be called with any of a CV, a GV, or an SV containing the name. */
2535 =for apidoc p||call_sv
2537 Performs a callback to the Perl sub whose name is in the SV. See
2544 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2545 /* See G_* flags in cop.h */
2548 LOGOP myop; /* fake syntax tree node */
2551 volatile I32 retval = 0;
2553 bool oldcatch = CATCH_GET;
2555 OP* const oldop = PL_op;
2558 if (flags & G_DISCARD) {
2563 Zero(&myop, 1, LOGOP);
2564 myop.op_next = NULL;
2565 if (!(flags & G_NOARGS))
2566 myop.op_flags |= OPf_STACKED;
2567 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2568 (flags & G_ARRAY) ? OPf_WANT_LIST :
2573 EXTEND(PL_stack_sp, 1);
2574 *++PL_stack_sp = sv;
2576 oldscope = PL_scopestack_ix;
2578 if (PERLDB_SUB && PL_curstash != PL_debstash
2579 /* Handle first BEGIN of -d. */
2580 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2581 /* Try harder, since this may have been a sighandler, thus
2582 * curstash may be meaningless. */
2583 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2584 && !(flags & G_NODEBUG))
2585 PL_op->op_private |= OPpENTERSUB_DB;
2587 if (flags & G_METHOD) {
2588 Zero(&method_op, 1, UNOP);
2589 method_op.op_next = PL_op;
2590 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2591 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2592 PL_op = (OP*)&method_op;
2595 if (!(flags & G_EVAL)) {
2597 call_body((OP*)&myop, FALSE);
2598 retval = PL_stack_sp - (PL_stack_base + oldmark);
2599 CATCH_SET(oldcatch);
2602 myop.op_other = (OP*)&myop;
2604 /* we're trying to emulate pp_entertry() here */
2606 register PERL_CONTEXT *cx;
2607 const I32 gimme = GIMME_V;
2612 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2614 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2616 PL_in_eval = EVAL_INEVAL;
2617 if (flags & G_KEEPERR)
2618 PL_in_eval |= EVAL_KEEPERR;
2620 sv_setpvn(ERRSV,"",0);
2628 call_body((OP*)&myop, FALSE);
2629 retval = PL_stack_sp - (PL_stack_base + oldmark);
2630 if (!(flags & G_KEEPERR))
2631 sv_setpvn(ERRSV,"",0);
2637 /* my_exit() was called */
2638 PL_curstash = PL_defstash;
2641 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2642 Perl_croak(aTHX_ "Callback called exit");
2647 PL_op = PL_restartop;
2651 PL_stack_sp = PL_stack_base + oldmark;
2652 if (flags & G_ARRAY)
2656 *++PL_stack_sp = &PL_sv_undef;
2661 if (PL_scopestack_ix > oldscope) {
2665 register PERL_CONTEXT *cx;
2672 PERL_UNUSED_VAR(newsp);
2673 PERL_UNUSED_VAR(gimme);
2674 PERL_UNUSED_VAR(optype);
2679 if (flags & G_DISCARD) {
2680 PL_stack_sp = PL_stack_base + oldmark;
2690 S_call_body(pTHX_ const OP *myop, bool is_eval)
2693 if (PL_op == myop) {
2695 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2697 PL_op = Perl_pp_entersub(aTHX); /* this does */
2703 /* Eval a string. The G_EVAL flag is always assumed. */
2706 =for apidoc p||eval_sv
2708 Tells Perl to C<eval> the string in the SV.
2714 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2716 /* See G_* flags in cop.h */
2720 UNOP myop; /* fake syntax tree node */
2721 volatile I32 oldmark = SP - PL_stack_base;
2722 volatile I32 retval = 0;
2724 OP* const oldop = PL_op;
2727 if (flags & G_DISCARD) {
2734 Zero(PL_op, 1, UNOP);
2735 EXTEND(PL_stack_sp, 1);
2736 *++PL_stack_sp = sv;
2738 if (!(flags & G_NOARGS))
2739 myop.op_flags = OPf_STACKED;
2740 myop.op_next = NULL;
2741 myop.op_type = OP_ENTEREVAL;
2742 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2743 (flags & G_ARRAY) ? OPf_WANT_LIST :
2745 if (flags & G_KEEPERR)
2746 myop.op_flags |= OPf_SPECIAL;
2748 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2749 * before a PUSHEVAL, which corrupts the stack after a croak */
2750 TAINT_PROPER("eval_sv()");
2756 call_body((OP*)&myop,TRUE);
2757 retval = PL_stack_sp - (PL_stack_base + oldmark);
2758 if (!(flags & G_KEEPERR))
2759 sv_setpvn(ERRSV,"",0);
2765 /* my_exit() was called */
2766 PL_curstash = PL_defstash;
2769 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2770 Perl_croak(aTHX_ "Callback called exit");
2775 PL_op = PL_restartop;
2779 PL_stack_sp = PL_stack_base + oldmark;
2780 if (flags & G_ARRAY)
2784 *++PL_stack_sp = &PL_sv_undef;
2790 if (flags & G_DISCARD) {
2791 PL_stack_sp = PL_stack_base + oldmark;
2801 =for apidoc p||eval_pv
2803 Tells Perl to C<eval> the given string and return an SV* result.
2809 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2813 SV* sv = newSVpv(p, 0);
2815 eval_sv(sv, G_SCALAR);
2822 if (croak_on_error && SvTRUE(ERRSV)) {
2823 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2829 /* Require a module. */
2832 =head1 Embedding Functions
2834 =for apidoc p||require_pv
2836 Tells Perl to C<require> the file named by the string argument. It is
2837 analogous to the Perl code C<eval "require '$file'">. It's even
2838 implemented that way; consider using load_module instead.
2843 Perl_require_pv(pTHX_ const char *pv)
2848 PUSHSTACKi(PERLSI_REQUIRE);
2850 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2851 eval_sv(sv_2mortal(sv), G_DISCARD);
2857 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2859 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2862 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2866 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2868 /* This message really ought to be max 23 lines.
2869 * Removed -h because the user already knows that option. Others? */
2871 static const char * const usage_msg[] = {
2872 "-0[octal] specify record separator (\\0, if no argument)",
2873 "-A[mod][=pattern] activate all/given assertions",
2874 "-a autosplit mode with -n or -p (splits $_ into @F)",
2875 "-C[number/list] enables the listed Unicode features",
2876 "-c check syntax only (runs BEGIN and CHECK blocks)",
2877 "-d[:debugger] run program under debugger",
2878 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2879 "-e program one line of program (several -e's allowed, omit programfile)",
2880 "-E program like -e, but enables all optional features",
2881 "-f don't do $sitelib/sitecustomize.pl at startup",
2882 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2883 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2884 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2885 "-l[octal] enable line ending processing, specifies line terminator",
2886 "-[mM][-]module execute \"use/no module...\" before executing program",
2887 "-n assume \"while (<>) { ... }\" loop around program",
2888 "-p assume loop like -n but print line also, like sed",
2889 "-P run program through C preprocessor before compilation",
2890 "-s enable rudimentary parsing for switches after programfile",
2891 "-S look for programfile using PATH environment variable",
2892 "-t enable tainting warnings",
2893 "-T enable tainting checks",
2894 "-u dump core after parsing program",
2895 "-U allow unsafe operations",
2896 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2897 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2898 "-w enable many useful warnings (RECOMMENDED)",
2899 "-W enable all warnings",
2900 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2901 "-X disable all warnings",
2905 const char * const *p = usage_msg;
2907 PerlIO_printf(PerlIO_stdout(),
2908 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2911 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2914 /* convert a string of -D options (or digits) into an int.
2915 * sets *s to point to the char after the options */
2919 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2921 static const char * const usage_msgd[] = {
2922 " Debugging flag values: (see also -d)",
2923 " p Tokenizing and parsing (with v, displays parse stack)",
2924 " s Stack snapshots (with v, displays all stacks)",
2925 " l Context (loop) stack processing",
2926 " t Trace execution",
2927 " o Method and overloading resolution",
2928 " c String/numeric conversions",
2929 " P Print profiling info, preprocessor command for -P, source file input state",
2930 " m Memory allocation",
2931 " f Format processing",
2932 " r Regular expression parsing and execution",
2933 " x Syntax tree dump",
2934 " u Tainting checks",
2935 " H Hash dump -- usurps values()",
2936 " X Scratchpad allocation",
2938 " S Thread synchronization",
2940 " R Include reference counts of dumped variables (eg when using -Ds)",
2941 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2942 " v Verbose: use in conjunction with other flags",
2944 " A Consistency checks on internal structures",
2945 " q quiet - currently only suppresses the 'EXECUTING' message",
2950 /* if adding extra options, remember to update DEBUG_MASK */
2951 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2953 for (; isALNUM(**s); (*s)++) {
2954 const char * const d = strchr(debopts,**s);
2956 i |= 1 << (d - debopts);
2957 else if (ckWARN_d(WARN_DEBUGGING))
2958 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2959 "invalid option -D%c, use -D'' to see choices\n", **s);
2962 else if (isDIGIT(**s)) {
2964 for (; isALNUM(**s); (*s)++) ;
2966 else if (givehelp) {
2967 const char *const *p = usage_msgd;
2968 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2971 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2972 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2973 "-Dp not implemented on this platform\n");
2979 /* This routine handles any switches that can be given during run */
2982 Perl_moreswitches(pTHX_ char *s)
2993 SvREFCNT_dec(PL_rs);
2994 if (s[1] == 'x' && s[2]) {
2995 const char *e = s+=2;
3001 flags = PERL_SCAN_SILENT_ILLDIGIT;
3002 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3003 if (s + numlen < e) {
3004 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3008 PL_rs = newSVpvs("");
3009 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3010 tmps = (U8*)SvPVX(PL_rs);
3011 uvchr_to_utf8(tmps, rschar);
3012 SvCUR_set(PL_rs, UNISKIP(rschar));
3017 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3018 if (rschar & ~((U8)~0))
3019 PL_rs = &PL_sv_undef;
3020 else if (!rschar && numlen >= 2)
3021 PL_rs = newSVpvs("");
3023 char ch = (char)rschar;
3024 PL_rs = newSVpvn(&ch, 1);
3027 sv_setsv(get_sv("/", TRUE), PL_rs);
3032 PL_unicode = parse_unicode_opts( (const char **)&s );
3037 while (*s && !isSPACE(*s)) ++s;
3038 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3049 forbid_setid('d', -1);
3052 /* -dt indicates to the debugger that threads will be used */
3053 if (*s == 't' && !isALNUM(s[1])) {
3055 my_setenv("PERL5DB_THREADED", "1");
3058 /* The following permits -d:Mod to accepts arguments following an =
3059 in the fashion that -MSome::Mod does. */
3060 if (*s == ':' || *s == '=') {
3062 SV * const sv = newSVpvs("use Devel::");
3064 /* We now allow -d:Module=Foo,Bar */
3065 while(isALNUM(*s) || *s==':') ++s;
3067 sv_catpv(sv, start);
3069 sv_catpvn(sv, start, s-start);
3070 /* Don't use NUL as q// delimiter here, this string goes in the
3072 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3075 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3078 PL_perldb = PERLDB_ALL;
3085 forbid_setid('D', -1);
3087 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3088 #else /* !DEBUGGING */
3089 if (ckWARN_d(WARN_DEBUGGING))
3090 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3091 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3092 for (s++; isALNUM(*s); s++) ;
3097 usage(PL_origargv[0]);
3100 Safefree(PL_inplace);
3101 #if defined(__CYGWIN__) /* do backup extension automagically */
3102 if (*(s+1) == '\0') {
3103 PL_inplace = savepvs(".bak");
3106 #endif /* __CYGWIN__ */
3108 const char *start = ++s;
3109 while (*s && !isSPACE(*s))
3112 PL_inplace = savepvn(start, s - start);
3116 if (*s == '-') /* Additional switches on #! line. */
3120 case 'I': /* -I handled both here and in parse_body() */
3121 forbid_setid('I', -1);
3123 while (*s && isSPACE(*s))
3128 /* ignore trailing spaces (possibly followed by other switches) */
3130 for (e = p; *e && !isSPACE(*e); e++) ;
3134 } while (*p && *p != '-');
3135 e = savepvn(s, e-s);
3136 incpush(e, TRUE, TRUE, FALSE, FALSE);
3143 Perl_croak(aTHX_ "No directory specified for -I");
3149 SvREFCNT_dec(PL_ors_sv);
3155 PL_ors_sv = newSVpvs("\n");
3156 numlen = 3 + (*s == '0');
3157 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3161 if (RsPARA(PL_rs)) {
3162 PL_ors_sv = newSVpvs("\n\n");
3165 PL_ors_sv = newSVsv(PL_rs);
3170 forbid_setid('A', -1);
3172 PL_preambleav = newAV();
3175 char * const start = s;
3176 SV * const sv = newSVpvs("use assertions::activate");
3177 while(isALNUM(*s) || *s == ':') ++s;
3179 sv_catpvs(sv, "::");
3180 sv_catpvn(sv, start, s-start);
3183 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3186 else if (*s != '\0') {
3187 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3189 av_push(PL_preambleav, sv);
3193 forbid_setid('M', -1); /* XXX ? */
3196 forbid_setid('m', -1); /* XXX ? */
3200 const char *use = "use ";
3201 /* -M-foo == 'no foo' */
3202 /* Leading space on " no " is deliberate, to make both
3203 possibilities the same length. */
3204 if (*s == '-') { use = " no "; ++s; }
3205 sv = newSVpvn(use,4);
3207 /* We allow -M'Module qw(Foo Bar)' */
3208 while(isALNUM(*s) || *s==':') ++s;
3210 sv_catpv(sv, start);
3211 if (*(start-1) == 'm') {
3213 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3214 sv_catpvs( sv, " ()");
3218 Perl_croak(aTHX_ "Module name required with -%c option",
3220 sv_catpvn(sv, start, s-start);
3221 sv_catpvs(sv, " split(/,/,q");
3222 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3224 sv_catpvs(sv, "\0)");
3228 PL_preambleav = newAV();
3229 av_push(PL_preambleav, sv);
3232 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3243 forbid_setid('s', -1);
3244 PL_doswitches = TRUE;
3258 #ifdef MACOS_TRADITIONAL
3259 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3261 PL_do_undump = TRUE;
3269 if (!sv_derived_from(PL_patchlevel, "version"))
3270 upg_version(PL_patchlevel);
3272 PerlIO_printf(PerlIO_stdout(),
3273 Perl_form(aTHX_ "\nThis is perl, %"SVf
3274 #ifdef PERL_PATCHNUM
3275 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3278 vstringify(PL_patchlevel),
3281 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3282 PerlIO_printf(PerlIO_stdout(),
3283 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3284 vstringify(PL_patchlevel)));
3285 PerlIO_printf(PerlIO_stdout(),
3286 Perl_form(aTHX_ " built under %s at %s %s\n",
3287 OSNAME, __DATE__, __TIME__));
3288 PerlIO_printf(PerlIO_stdout(),
3289 Perl_form(aTHX_ " OS Specific Release: %s\n",
3293 #if defined(LOCAL_PATCH_COUNT)
3294 if (LOCAL_PATCH_COUNT > 0)
3295 PerlIO_printf(PerlIO_stdout(),
3296 "\n(with %d registered patch%s, "
3297 "see perl -V for more detail)",
3298 (int)LOCAL_PATCH_COUNT,
3299 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "\n\nCopyright 1987-2006, Larry Wall\n");
3304 #ifdef MACOS_TRADITIONAL
3305 PerlIO_printf(PerlIO_stdout(),
3306 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3307 "maintained by Chris Nandor\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3316 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3321 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3324 PerlIO_printf(PerlIO_stdout(),
3325 "atariST series port, ++jrb bammi@cadence.com\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3332 PerlIO_printf(PerlIO_stdout(),
3333 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3344 PerlIO_printf(PerlIO_stdout(),
3345 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3348 PerlIO_printf(PerlIO_stdout(),
3349 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3352 PerlIO_printf(PerlIO_stdout(),
3353 "MiNT port by Guido Flohr, 1997-1999\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "EPOC port by Olaf Flebbe, 1999-2002\n");
3360 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3361 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3364 #ifdef __SYMBIAN32__
3365 PerlIO_printf(PerlIO_stdout(),
3366 "Symbian port by Nokia, 2004-2005\n");
3368 #ifdef BINARY_BUILD_NOTICE
3369 BINARY_BUILD_NOTICE;
3371 PerlIO_printf(PerlIO_stdout(),
3373 Perl may be copied only under the terms of either the Artistic License or the\n\
3374 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3375 Complete documentation for Perl, including FAQ lists, should be found on\n\
3376 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3377 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3380 if (! (PL_dowarn & G_WARN_ALL_MASK))
3381 PL_dowarn |= G_WARN_ON;
3385 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3386 if (!specialWARN(PL_compiling.cop_warnings))
3387 SvREFCNT_dec(PL_compiling.cop_warnings);
3388 PL_compiling.cop_warnings = pWARN_ALL ;
3392 PL_dowarn = G_WARN_ALL_OFF;
3393 if (!specialWARN(PL_compiling.cop_warnings))
3394 SvREFCNT_dec(PL_compiling.cop_warnings);
3395 PL_compiling.cop_warnings = pWARN_NONE ;
3400 if (s[1] == '-') /* Additional switches on #! line. */
3405 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3411 #ifdef ALTERNATE_SHEBANG
3412 case 'S': /* OS/2 needs -S on "extproc" line. */
3420 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3425 /* compliments of Tom Christiansen */
3427 /* unexec() can be found in the Gnu emacs distribution */
3428 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3431 Perl_my_unexec(pTHX)
3433 PERL_UNUSED_CONTEXT;
3435 SV * prog = newSVpv(BIN_EXP, 0);
3436 SV * file = newSVpv(PL_origfilename, 0);
3440 sv_catpvs(prog, "/perl");
3441 sv_catpvs(file, ".perldump");
3443 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3444 /* unexec prints msg to stderr in case of failure */
3445 PerlProc_exit(status);
3448 # include <lib$routines.h>
3449 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3450 # elif defined(WIN32) || defined(__CYGWIN__)
3451 Perl_croak(aTHX_ "dump is not supported");
3453 ABORT(); /* for use with undump */
3458 /* initialize curinterp */
3464 # define PERLVAR(var,type)
3465 # define PERLVARA(var,n,type)
3466 # if defined(PERL_IMPLICIT_CONTEXT)
3467 # define PERLVARI(var,type,init) aTHX->var = init;
3468 # define PERLVARIC(var,type,init) aTHX->var = init;
3470 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3471 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3473 # include "intrpvar.h"
3474 # include "thrdvar.h"
3480 # define PERLVAR(var,type)
3481 # define PERLVARA(var,n,type)
3482 # define PERLVARI(var,type,init) PL_##var = init;
3483 # define PERLVARIC(var,type,init) PL_##var = init;
3484 # include "intrpvar.h"
3485 # include "thrdvar.h"
3495 S_init_main_stash(pTHX)
3500 PL_curstash = PL_defstash = newHV();
3501 /* We know that the string "main" will be in the global shared string
3502 table, so it's a small saving to use it rather than allocate another
3504 PL_curstname = newSVpvs_share("main");
3505 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3506 /* If we hadn't caused another reference to "main" to be in the shared
3507 string table above, then it would be worth reordering these two,
3508 because otherwise all we do is delete "main" from it as a consequence
3509 of the SvREFCNT_dec, only to add it again with hv_name_set */
3510 SvREFCNT_dec(GvHV(gv));
3511 hv_name_set(PL_defstash, "main", 4, 0);
3512 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3514 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3516 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3517 GvMULTI_on(PL_incgv);
3518 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3519 GvMULTI_on(PL_hintgv);
3520 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3521 SvREFCNT_inc_simple(PL_defgv);
3522 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3523 SvREFCNT_inc_simple(PL_errgv);
3524 GvMULTI_on(PL_errgv);
3525 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3526 GvMULTI_on(PL_replgv);
3527 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3528 #ifdef PERL_DONT_CREATE_GVSV
3531 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3532 sv_setpvn(ERRSV, "", 0);
3533 PL_curstash = PL_defstash;
3534 CopSTASH_set(&PL_compiling, PL_defstash);
3535 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3536 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3538 /* We must init $/ before switches are processed. */
3539 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3543 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3549 const char *cpp_discard_flag;
3558 PL_origfilename = savepvs("-e");
3561 /* if find_script() returns, it returns a malloc()-ed value */
3562 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3564 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3565 const char *s = scriptname + 8;
3571 * Tell apart "normal" usage of fdscript, e.g.
3572 * with bash on FreeBSD:
3573 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3574 * from usage in suidperl.
3575 * Does any "normal" usage leave garbage after the number???
3576 * Is it a mistake to use a similar /dev/fd/ construct for
3581 * Be supersafe and do some sanity-checks.
3582 * Still, can we be sure we got the right thing?
3585 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3588 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3590 scriptname = savepv(s + 1);
3591 Safefree(PL_origfilename);
3592 PL_origfilename = (char *)scriptname;
3597 CopFILE_free(PL_curcop);
3598 CopFILE_set(PL_curcop, PL_origfilename);
3599 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3600 scriptname = (char *)"";
3601 if (fdscript >= 0) {
3602 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3603 # if defined(HAS_FCNTL) && defined(F_SETFD)
3605 /* ensure close-on-exec */
3606 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3611 Perl_croak(aTHX_ "sperl needs fd script\n"
3612 "You should not call sperl directly; do you need to "
3613 "change a #! line\nfrom sperl to perl?\n");
3616 * Do not open (or do other fancy stuff) while setuid.
3617 * Perl does the open, and hands script to suidperl on a fd;
3618 * suidperl only does some checks, sets up UIDs and re-execs
3619 * perl with that fd as it has always done.
3622 if (*suidscript != 1) {
3623 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3626 else if (PL_preprocess) {
3627 const char * const cpp_cfg = CPPSTDIN;
3628 SV * const cpp = newSVpvs("");
3629 SV * const cmd = newSV(0);
3631 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3632 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3633 if (strEQ(cpp_cfg, "cppstdin"))
3634 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3635 sv_catpv(cpp, cpp_cfg);
3638 sv_catpvs(sv, "-I");
3639 sv_catpv(sv,PRIVLIB_EXP);
3642 DEBUG_P(PerlIO_printf(Perl_debug_log,
3643 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3644 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3647 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3654 cpp_discard_flag = "";
3656 cpp_discard_flag = "-C";
3660 perl = os2_execname(aTHX);
3662 perl = PL_origargv[0];
3666 /* This strips off Perl comments which might interfere with
3667 the C pre-processor, including #!. #line directives are
3668 deliberately stripped to avoid confusion with Perl's version
3669 of #line. FWP played some golf with it so it will fit
3670 into VMS's 255 character buffer.
3673 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3675 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3677 Perl_sv_setpvf(aTHX_ cmd, "\
3678 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3679 perl, quote, code, quote, scriptname, cpp,
3680 cpp_discard_flag, sv, CPPMINUS);
3682 PL_doextract = FALSE;
3684 DEBUG_P(PerlIO_printf(Perl_debug_log,
3685 "PL_preprocess: cmd=\"%s\"\n",
3688 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3692 else if (!*scriptname) {
3693 forbid_setid(0, *suidscript);
3694 PL_rsfp = PerlIO_stdin();
3697 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3698 # if defined(HAS_FCNTL) && defined(F_SETFD)
3700 /* ensure close-on-exec */
3701 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3704 #endif /* IAMSUID */
3706 /* PSz 16 Sep 03 Keep neat error message */
3708 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3710 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3711 CopFILE(PL_curcop), Strerror(errno));
3717 * I_SYSSTATVFS HAS_FSTATVFS
3719 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3720 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3721 * here so that metaconfig picks them up. */
3725 S_fd_on_nosuid_fs(pTHX_ int fd)
3728 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3729 * but is needed also on machines without setreuid.
3730 * Seems safe enough to run as root.
3732 int check_okay = 0; /* able to do all the required sys/libcalls */
3733 int on_nosuid = 0; /* the fd is on a nosuid fs */
3735 * Need to check noexec also: nosuid might not be set, the average
3736 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3738 int on_noexec = 0; /* the fd is on a noexec fs */
3741 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3742 * fstatvfs() is UNIX98.
3743 * fstatfs() is 4.3 BSD.
3744 * ustat()+getmnt() is pre-4.3 BSD.
3745 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3746 * an irrelevant filesystem while trying to reach the right one.
3749 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3751 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3752 defined(HAS_FSTATVFS)
3753 # define FD_ON_NOSUID_CHECK_OKAY
3754 struct statvfs stfs;
3756 check_okay = fstatvfs(fd, &stfs) == 0;
3757 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3759 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3760 on platforms where it is present. */
3761 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3763 # endif /* fstatvfs */
3765 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3766 defined(PERL_MOUNT_NOSUID) && \
3767 defined(PERL_MOUNT_NOEXEC) && \
3768 defined(HAS_FSTATFS) && \
3769 defined(HAS_STRUCT_STATFS) && \
3770 defined(HAS_STRUCT_STATFS_F_FLAGS)
3771 # define FD_ON_NOSUID_CHECK_OKAY
3774 check_okay = fstatfs(fd, &stfs) == 0;
3775 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3776 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3777 # endif /* fstatfs */
3779 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3780 defined(PERL_MOUNT_NOSUID) && \
3781 defined(PERL_MOUNT_NOEXEC) && \
3782 defined(HAS_FSTAT) && \
3783 defined(HAS_USTAT) && \
3784 defined(HAS_GETMNT) && \
3785 defined(HAS_STRUCT_FS_DATA) && \
3787 # define FD_ON_NOSUID_CHECK_OKAY
3790 if (fstat(fd, &fdst) == 0) {
3792 if (ustat(fdst.st_dev, &us) == 0) {
3794 /* NOSTAT_ONE here because we're not examining fields which
3795 * vary between that case and STAT_ONE. */
3796 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3797 size_t cmplen = sizeof(us.f_fname);
3798 if (sizeof(fsd.fd_req.path) < cmplen)
3799 cmplen = sizeof(fsd.fd_req.path);
3800 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3801 fdst.st_dev == fsd.fd_req.dev) {
3803 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3804 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3809 # endif /* fstat+ustat+getmnt */
3811 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3812 defined(HAS_GETMNTENT) && \
3813 defined(HAS_HASMNTOPT) && \
3814 defined(MNTOPT_NOSUID) && \
3815 defined(MNTOPT_NOEXEC)
3816 # define FD_ON_NOSUID_CHECK_OKAY
3817 FILE *mtab = fopen("/etc/mtab", "r");
3818 struct mntent *entry;
3821 if (mtab && (fstat(fd, &stb) == 0)) {
3822 while (entry = getmntent(mtab)) {
3823 if (stat(entry->mnt_dir, &fsb) == 0
3824 && fsb.st_dev == stb.st_dev)
3826 /* found the filesystem */
3828 if (hasmntopt(entry, MNTOPT_NOSUID))
3830 if (hasmntopt(entry, MNTOPT_NOEXEC))
3833 } /* A single fs may well fail its stat(). */
3838 # endif /* getmntent+hasmntopt */
3841 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3843 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3845 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3846 return ((!check_okay) || on_nosuid || on_noexec);
3848 #endif /* IAMSUID */
3851 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3852 int fdscript, int suidscript)
3857 #endif /* IAMSUID */
3859 /* do we need to emulate setuid on scripts? */
3861 /* This code is for those BSD systems that have setuid #! scripts disabled
3862 * in the kernel because of a security problem. Merely defining DOSUID
3863 * in perl will not fix that problem, but if you have disabled setuid
3864 * scripts in the kernel, this will attempt to emulate setuid and setgid
3865 * on scripts that have those now-otherwise-useless bits set. The setuid
3866 * root version must be called suidperl or sperlN.NNN. If regular perl
3867 * discovers that it has opened a setuid script, it calls suidperl with
3868 * the same argv that it had. If suidperl finds that the script it has
3869 * just opened is NOT setuid root, it sets the effective uid back to the
3870 * uid. We don't just make perl setuid root because that loses the
3871 * effective uid we had before invoking perl, if it was different from the
3874 * Description/comments above do not match current workings:
3875 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3876 * suidperl called with script open and name changed to /dev/fd/N/X;
3877 * suidperl croaks if script is not setuid;
3878 * making perl setuid would be a huge security risk (and yes, that
3879 * would lose any euid we might have had).
3881 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3882 * be defined in suidperl only. suidperl must be setuid root. The
3883 * Configure script will set this up for you if you want it.
3889 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3890 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3891 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3893 const char *linestr;
3897 if (fdscript < 0 || suidscript != 1)
3898 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3900 * Since the script is opened by perl, not suidperl, some of these
3901 * checks are superfluous. Leaving them in probably does not lower
3905 * Do checks even for systems with no HAS_SETREUID.
3906 * We used to swap, then re-swap UIDs with
3908 if (setreuid(PL_euid,PL_uid) < 0
3909 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3910 Perl_croak(aTHX_ "Can't swap uid and euid");
3913 if (setreuid(PL_uid,PL_euid) < 0
3914 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3915 Perl_croak(aTHX_ "Can't reswap uid and euid");
3919 /* On this access check to make sure the directories are readable,
3920 * there is actually a small window that the user could use to make
3921 * filename point to an accessible directory. So there is a faint
3922 * chance that someone could execute a setuid script down in a
3923 * non-accessible directory. I don't know what to do about that.
3924 * But I don't think it's too important. The manual lies when
3925 * it says access() is useful in setuid programs.
3927 * So, access() is pretty useless... but not harmful... do anyway.
3929 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3930 Perl_croak(aTHX_ "Can't access() script\n");
3933 /* If we can swap euid and uid, then we can determine access rights
3934 * with a simple stat of the file, and then compare device and
3935 * inode to make sure we did stat() on the same file we opened.
3936 * Then we just have to make sure he or she can execute it.
3939 * As the script is opened by perl, not suidperl, we do not need to
3940 * care much about access rights.
3942 * The 'script changed' check is needed, or we can get lied to
3943 * about $0 with e.g.
3944 * suidperl /dev/fd/4//bin/x 4<setuidscript
3945 * Without HAS_SETREUID, is it safe to stat() as root?
3947 * Are there any operating systems that pass /dev/fd/xxx for setuid
3948 * scripts, as suggested/described in perlsec(1)? Surely they do not
3949 * pass the script name as we do, so the "script changed" test would
3950 * fail for them... but we never get here with
3951 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3953 * This is one place where we must "lie" about return status: not
3954 * say if the stat() failed. We are doing this as root, and could
3955 * be tricked into reporting existence or not of files that the
3956 * "plain" user cannot even see.
3960 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3961 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3962 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3963 Perl_croak(aTHX_ "Setuid script changed\n");
3967 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3968 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3971 * We used to do this check as the "plain" user (after swapping
3972 * UIDs). But the check for nosuid and noexec filesystem is needed,
3973 * and should be done even without HAS_SETREUID. (Maybe those
3974 * operating systems do not have such mount options anyway...)
3975 * Seems safe enough to do as root.
3977 #if !defined(NO_NOSUID_CHECK)
3978 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3979 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3982 #endif /* IAMSUID */
3984 if (!S_ISREG(PL_statbuf.st_mode)) {
3985 Perl_croak(aTHX_ "Setuid script not plain file\n");
3987 if (PL_statbuf.st_mode & S_IWOTH)
3988 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3989 PL_doswitches = FALSE; /* -s is insecure in suid */
3990 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3991 CopLINE_inc(PL_curcop);
3992 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3993 Perl_croak(aTHX_ "No #! line");
3994 linestr = SvPV_nolen_const(PL_linestr);
3995 /* required even on Sys V */
3996 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3997 Perl_croak(aTHX_ "No #! line");
4001 /* Sanity check on line length */
4002 s_end = s + strlen(s);
4003 if (s_end == s || (s_end - s) > 4000)
4004 Perl_croak(aTHX_ "Very long #! line");
4005 /* Allow more than a single space after #! */
4006 while (isSPACE(*s)) s++;
4007 /* Sanity check on buffer end */
4008 while ((*s) && !isSPACE(*s)) s++;
4009 for (s2 = s; (s2 > linestr &&
4010 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4011 || s2[-1] == '-')); s2--) ;
4012 /* Sanity check on buffer start */
4013 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4014 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4015 Perl_croak(aTHX_ "Not a perl script");
4016 while (*s == ' ' || *s == '\t') s++;
4018 * #! arg must be what we saw above. They can invoke it by
4019 * mentioning suidperl explicitly, but they may not add any strange
4020 * arguments beyond what #! says if they do invoke suidperl that way.
4023 * The way validarg was set up, we rely on the kernel to start
4024 * scripts with argv[1] set to contain all #! line switches (the
4028 * Check that we got all the arguments listed in the #! line (not
4029 * just that there are no extraneous arguments). Might not matter
4030 * much, as switches from #! line seem to be acted upon (also), and
4031 * so may be checked and trapped in perl. But, security checks must
4032 * be done in suidperl and not deferred to perl. Note that suidperl
4033 * does not get around to parsing (and checking) the switches on
4034 * the #! line (but execs perl sooner).
4035 * Allow (require) a trailing newline (which may be of two
4036 * characters on some architectures?) (but no other trailing
4039 len = strlen(validarg);
4040 if (strEQ(validarg," PHOOEY ") ||
4041 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4042 !((s_end - s) == len+1
4043 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4044 Perl_croak(aTHX_ "Args must match #! line");
4048 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4049 PL_euid == PL_statbuf.st_uid)
4051 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4052 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4053 #endif /* IAMSUID */
4056 PL_euid) { /* oops, we're not the setuid root perl */
4058 * When root runs a setuid script, we do not go through the same
4059 * steps of execing sperl and then perl with fd scripts, but
4060 * simply set up UIDs within the same perl invocation; so do
4061 * not have the same checks (on options, whatever) that we have
4062 * for plain users. No problem really: would have to be a script
4063 * that does not actually work for plain users; and if root is
4064 * foolish and can be persuaded to run such an unsafe script, he
4065 * might run also non-setuid ones, and deserves what he gets.
4067 * Or, we might drop the PL_euid check above (and rely just on
4068 * fdscript to avoid loops), and do the execs
4074 * Pass fd script to suidperl.
4075 * Exec suidperl, substituting fd script for scriptname.
4076 * Pass script name as "subdir" of fd, which perl will grok;
4077 * in fact will use that to distinguish this from "normal"
4078 * usage, see comments above.
4080 PerlIO_rewind(PL_rsfp);
4081 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4082 /* PSz 27 Feb 04 Sanity checks on scriptname */
4083 if ((!scriptname) || (!*scriptname) ) {
4084 Perl_croak(aTHX_ "No setuid script name\n");
4086 if (*scriptname == '-') {
4087 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4088 /* Or we might confuse it with an option when replacing
4089 * name in argument list, below (though we do pointer, not
4090 * string, comparisons).
4093 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4094 if (!PL_origargv[which]) {
4095 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4097 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4098 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4099 #if defined(HAS_FCNTL) && defined(F_SETFD)
4100 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4103 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4104 (int)PERL_REVISION, (int)PERL_VERSION,
4105 (int)PERL_SUBVERSION), PL_origargv);
4107 #endif /* IAMSUID */
4108 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4111 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4113 * This seems back to front: we try HAS_SETEGID first; if not available
4114 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4115 * in the sense that we only want to set EGID; but are there any machines
4116 * with either of the latter, but not the former? Same with UID, later.
4119 (void)setegid(PL_statbuf.st_gid);
4122 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4124 #ifdef HAS_SETRESGID
4125 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4127 PerlProc_setgid(PL_statbuf.st_gid);
4131 if (PerlProc_getegid() != PL_statbuf.st_gid)
4132 Perl_croak(aTHX_ "Can't do setegid!\n");
4134 if (PL_statbuf.st_mode & S_ISUID) {
4135 if (PL_statbuf.st_uid != PL_euid)
4137 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4140 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4142 #ifdef HAS_SETRESUID
4143 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4145 PerlProc_setuid(PL_statbuf.st_uid);
4149 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4150 Perl_croak(aTHX_ "Can't do seteuid!\n");
4152 else if (PL_uid) { /* oops, mustn't run as root */
4154 (void)seteuid((Uid_t)PL_uid);
4157 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4159 #ifdef HAS_SETRESUID
4160 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4162 PerlProc_setuid((Uid_t)PL_uid);
4166 if (PerlProc_geteuid() != PL_uid)
4167 Perl_croak(aTHX_ "Can't do seteuid!\n");
4170 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4171 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4174 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4175 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4176 else if (fdscript < 0 || suidscript != 1)
4177 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4178 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4180 /* PSz 16 Sep 03 Keep neat error message */
4181 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4184 /* We absolutely must clear out any saved ids here, so we */
4185 /* exec the real perl, substituting fd script for scriptname. */
4186 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4188 * It might be thought that using setresgid and/or setresuid (changed to
4189 * set the saved IDs) above might obviate the need to exec, and we could
4190 * go on to "do the perl thing".
4192 * Is there such a thing as "saved GID", and is that set for setuid (but
4193 * not setgid) execution like suidperl? Without exec, it would not be
4194 * cleared for setuid (but not setgid) scripts (or might need a dummy
4197 * We need suidperl to do the exact same argument checking that perl
4198 * does. Thus it cannot be very small; while it could be significantly
4199 * smaller, it is safer (simpler?) to make it essentially the same
4200 * binary as perl (but they are not identical). - Maybe could defer that
4201 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4202 * but prefer to do thorough checks in suidperl itself. Such deferral
4203 * would make suidperl security rely on perl, a design no-no.
4205 * Setuid things should be short and simple, thus easy to understand and
4206 * verify. They should do their "own thing", without influence by
4207 * attackers. It may help if their internal execution flow is fixed,
4208 * regardless of platform: it may be best to exec anyway.
4210 * Suidperl should at least be conceptually simple: a wrapper only,
4211 * never to do any real perl. Maybe we should put
4213 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4215 * into the perly bits.
4217 PerlIO_rewind(PL_rsfp);
4218 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4220 * Keep original arguments: suidperl already has fd script.
4222 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4223 /* if (!PL_origargv[which]) { */
4224 /* errno = EPERM; */
4225 /* Perl_croak(aTHX_ "Permission denied\n"); */
4227 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4228 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4229 #if defined(HAS_FCNTL) && defined(F_SETFD)
4230 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4233 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4234 (int)PERL_REVISION, (int)PERL_VERSION,
4235 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4237 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4238 #endif /* IAMSUID */
4240 PERL_UNUSED_ARG(fdscript);
4241 PERL_UNUSED_ARG(suidscript);
4242 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4243 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4244 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4245 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4247 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4250 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4251 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4252 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4253 /* not set-id, must be wrapped */
4256 PERL_UNUSED_ARG(validarg);
4257 PERL_UNUSED_ARG(scriptname);
4261 S_find_beginning(pTHX)
4265 register const char *s2;
4266 #ifdef MACOS_TRADITIONAL
4270 /* skip forward in input to the real script? */
4272 #ifdef MACOS_TRADITIONAL
4273 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4275 while (PL_doextract || gMacPerl_AlwaysExtract) {
4276 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4277 if (!gMacPerl_AlwaysExtract)
4278 Perl_croak(aTHX_ "No Perl script found in input\n");
4280 if (PL_doextract) /* require explicit override ? */
4281 if (!OverrideExtract(PL_origfilename))
4282 Perl_croak(aTHX_ "User aborted script\n");
4284 PL_doextract = FALSE;
4286 /* Pater peccavi, file does not have #! */
4287 PerlIO_rewind(PL_rsfp);
4292 while (PL_doextract) {
4293 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4294 Perl_croak(aTHX_ "No Perl script found in input\n");
4297 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4298 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4299 PL_doextract = FALSE;
4300 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4302 while (*s == ' ' || *s == '\t') s++;
4304 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4305 || s2[-1] == '_') s2--;
4306 if (strnEQ(s2-4,"perl",4))
4307 while ((s = moreswitches(s)))
4310 #ifdef MACOS_TRADITIONAL
4311 /* We are always searching for the #!perl line in MacPerl,
4312 * so if we find it, still keep the line count correct
4313 * by counting lines we already skipped over
4315 for (; maclines > 0 ; maclines--)
4316 PerlIO_ungetc(PL_rsfp, '\n');
4320 /* gMacPerl_AlwaysExtract is false in MPW tool */
4321 } else if (gMacPerl_AlwaysExtract) {
4333 PL_uid = PerlProc_getuid();
4334 PL_euid = PerlProc_geteuid();
4335 PL_gid = PerlProc_getgid();
4336 PL_egid = PerlProc_getegid();
4338 PL_uid |= PL_gid << 16;
4339 PL_euid |= PL_egid << 16;
4341 /* Should not happen: */
4342 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4343 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4346 * Should go by suidscript, not uid!=euid: why disallow
4347 * system("ls") in scripts run from setuid things?
4348 * Or, is this run before we check arguments and set suidscript?
4349 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4350 * (We never have suidscript, can we be sure to have fdscript?)
4351 * Or must then go by UID checks? See comments in forbid_setid also.
4355 /* This is used very early in the lifetime of the program,
4356 * before even the options are parsed, so PL_tainting has
4357 * not been initialized properly. */
4359 Perl_doing_taint(int argc, char *argv[], char *envp[])
4361 #ifndef PERL_IMPLICIT_SYS
4362 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4363 * before we have an interpreter-- and the whole point of this
4364 * function is to be called at such an early stage. If you are on
4365 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4366 * "tainted because running with altered effective ids', you'll
4367 * have to add your own checks somewhere in here. The two most
4368 * known samples of 'implicitness' are Win32 and NetWare, neither
4369 * of which has much of concept of 'uids'. */
4370 int uid = PerlProc_getuid();
4371 int euid = PerlProc_geteuid();
4372 int gid = PerlProc_getgid();
4373 int egid = PerlProc_getegid();
4380 if (uid && (euid != uid || egid != gid))
4382 #endif /* !PERL_IMPLICIT_SYS */
4383 /* This is a really primitive check; environment gets ignored only
4384 * if -T are the first chars together; otherwise one gets
4385 * "Too late" message. */
4386 if ( argc > 1 && argv[1][0] == '-'
4387 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4392 /* Passing the flag as a single char rather than a string is a slight space
4393 optimisation. The only message that isn't /^-.$/ is
4394 "program input from stdin", which is substituted in place of '\0', which
4395 could never be a command line flag. */
4397 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4400 char string[3] = "-x";
4401 const char *message = "program input from stdin";
4408 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4409 if (PL_euid != PL_uid)
4410 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4411 if (PL_egid != PL_gid)
4412 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4413 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4415 * Checks for UID/GID above "wrong": why disallow
4416 * perl -e 'print "Hello\n"'
4417 * from within setuid things?? Simply drop them: replaced by
4418 * fdscript/suidscript and #ifdef IAMSUID checks below.
4420 * This may be too late for command-line switches. Will catch those on
4421 * the #! line, after finding the script name and setting up
4422 * fdscript/suidscript. Note that suidperl does not get around to
4423 * parsing (and checking) the switches on the #! line, but checks that
4424 * the two sets are identical.
4426 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4427 * instead, or would that be "too late"? (We never have suidscript, can
4428 * we be sure to have fdscript?)
4430 * Catch things with suidscript (in descendant of suidperl), even with
4431 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4432 * below; but I am paranoid.
4434 * Also see comments about root running a setuid script, elsewhere.
4436 if (suidscript >= 0)
4437 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4439 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4440 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4441 #endif /* IAMSUID */
4445 Perl_init_debugger(pTHX)
4448 HV * const ostash = PL_curstash;
4450 PL_curstash = PL_debstash;
4451 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4453 AvREAL_off(PL_dbargs);
4454 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4455 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4456 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4457 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4458 sv_setiv(PL_DBsingle, 0);
4459 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4460 sv_setiv(PL_DBtrace, 0);
4461 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4462 sv_setiv(PL_DBsignal, 0);
4463 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4464 sv_setiv(PL_DBassertion, 0);
4465 PL_curstash = ostash;
4468 #ifndef STRESS_REALLOC
4469 #define REASONABLE(size) (size)
4471 #define REASONABLE(size) (1) /* unreasonable */
4475 Perl_init_stacks(pTHX)
4478 /* start with 128-item stack and 8K cxstack */
4479 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4480 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4481 PL_curstackinfo->si_type = PERLSI_MAIN;
4482 PL_curstack = PL_curstackinfo->si_stack;
4483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4485 PL_stack_base = AvARRAY(PL_curstack);
4486 PL_stack_sp = PL_stack_base;
4487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4489 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4492 PL_tmps_max = REASONABLE(128);
4494 Newx(PL_markstack,REASONABLE(32),I32);
4495 PL_markstack_ptr = PL_markstack;
4496 PL_markstack_max = PL_markstack + REASONABLE(32);
4500 Newx(PL_scopestack,REASONABLE(32),I32);
4501 PL_scopestack_ix = 0;
4502 PL_scopestack_max = REASONABLE(32);
4504 Newx(PL_savestack,REASONABLE(128),ANY);
4505 PL_savestack_ix = 0;
4506 PL_savestack_max = REASONABLE(128);
4515 while (PL_curstackinfo->si_next)
4516 PL_curstackinfo = PL_curstackinfo->si_next;
4517 while (PL_curstackinfo) {
4518 PERL_SI *p = PL_curstackinfo->si_prev;
4519 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4520 Safefree(PL_curstackinfo->si_cxstack);
4521 Safefree(PL_curstackinfo);
4522 PL_curstackinfo = p;
4524 Safefree(PL_tmps_stack);
4525 Safefree(PL_markstack);
4526 Safefree(PL_scopestack);
4527 Safefree(PL_savestack);
4537 lex_start(PL_linestr);
4539 PL_subname = newSVpvs("main");
4543 S_init_predump_symbols(pTHX)
4549 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4550 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4551 GvMULTI_on(PL_stdingv);
4552 io = GvIOp(PL_stdingv);
4553 IoTYPE(io) = IoTYPE_RDONLY;
4554 IoIFP(io) = PerlIO_stdin();
4555 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4557 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4559 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4562 IoTYPE(io) = IoTYPE_WRONLY;
4563 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4565 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4567 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4569 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4570 GvMULTI_on(PL_stderrgv);
4571 io = GvIOp(PL_stderrgv);
4572 IoTYPE(io) = IoTYPE_WRONLY;
4573 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4574 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4576 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4578 PL_statname = newSV(0); /* last filename we did stat on */
4580 Safefree(PL_osname);
4581 PL_osname = savepv(OSNAME);
4585 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4588 argc--,argv++; /* skip name of script */
4589 if (PL_doswitches) {
4590 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4594 if (argv[0][1] == '-' && !argv[0][2]) {
4598 if ((s = strchr(argv[0], '='))) {
4599 const char *const start_name = argv[0] + 1;
4600 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4601 TRUE, SVt_PV)), s + 1);
4604 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4607 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4608 GvMULTI_on(PL_argvgv);
4609 (void)gv_AVadd(PL_argvgv);
4610 av_clear(GvAVn(PL_argvgv));
4611 for (; argc > 0; argc--,argv++) {
4612 SV * const sv = newSVpv(argv[0],0);
4613 av_push(GvAVn(PL_argvgv),sv);
4614 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4615 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4618 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4619 (void)sv_utf8_decode(sv);
4625 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4630 PL_toptarget = newSV(0);
4631 sv_upgrade(PL_toptarget, SVt_PVFM);
4632 sv_setpvn(PL_toptarget, "", 0);
4633 PL_bodytarget = newSV(0);
4634 sv_upgrade(PL_bodytarget, SVt_PVFM);
4635 sv_setpvn(PL_bodytarget, "", 0);
4636 PL_formtarget = PL_bodytarget;
4640 init_argv_symbols(argc,argv);
4642 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4643 #ifdef MACOS_TRADITIONAL
4644 /* $0 is not majick on a Mac */
4645 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4647 sv_setpv(GvSV(tmpgv),PL_origfilename);
4648 magicname("0", "0", 1);
4651 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4653 GvMULTI_on(PL_envgv);
4654 hv = GvHVn(PL_envgv);
4655 hv_magic(hv, NULL, PERL_MAGIC_env);
4657 #ifdef USE_ENVIRON_ARRAY
4658 /* Note that if the supplied env parameter is actually a copy
4659 of the global environ then it may now point to free'd memory
4660 if the environment has been modified since. To avoid this
4661 problem we treat env==NULL as meaning 'use the default'
4666 # ifdef USE_ITHREADS
4667 && PL_curinterp == aTHX
4674 char** origenv = environ;
4677 for (; *env; env++) {
4678 if (!(s = strchr(*env,'=')) || s == *env)
4680 #if defined(MSDOS) && !defined(DJGPP)
4685 sv = newSVpv(s+1, 0);
4686 (void)hv_store(hv, *env, s - *env, sv, 0);
4689 if (origenv != environ) {
4690 /* realloc has shifted us */
4691 env = (env - origenv) + environ;
4696 #endif /* USE_ENVIRON_ARRAY */
4697 #endif /* !PERL_MICRO */
4700 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4701 SvREADONLY_off(GvSV(tmpgv));
4702 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4703 SvREADONLY_on(GvSV(tmpgv));
4705 #ifdef THREADS_HAVE_PIDS
4706 PL_ppid = (IV)getppid();
4709 /* touch @F array to prevent spurious warnings 20020415 MJD */
4711 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4713 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4714 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4715 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4719 S_init_perllib(pTHX)
4725 s = PerlEnv_getenv("PERL5LIB");
4727 * It isn't possible to delete an environment variable with
4728 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4729 * case we treat PERL5LIB as undefined if it has a zero-length value.
4731 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4732 if (s && *s != '\0')
4736 incpush(s, TRUE, TRUE, TRUE, FALSE);
4738 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4740 /* Treat PERL5?LIB as a possible search list logical name -- the
4741 * "natural" VMS idiom for a Unix path string. We allow each
4742 * element to be a set of |-separated directories for compatibility.
4746 if (my_trnlnm("PERL5LIB",buf,0))
4747 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4749 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4753 /* Use the ~-expanded versions of APPLLIB (undocumented),
4754 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4757 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4761 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4763 #ifdef MACOS_TRADITIONAL
4766 SV * privdir = newSV(0);
4767 char * macperl = PerlEnv_getenv("MACPERL");
4772 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4773 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4774 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4775 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4776 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4777 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4779 SvREFCNT_dec(privdir);
4782 incpush(":", FALSE, FALSE, TRUE, FALSE);
4785 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4788 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4790 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4794 /* sitearch is always relative to sitelib on Windows for
4795 * DLL-based path intuition to work correctly */
4796 # if !defined(WIN32)
4797 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4803 /* this picks up sitearch as well */
4804 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4806 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4810 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4811 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4814 #ifdef PERL_VENDORARCH_EXP
4815 /* vendorarch is always relative to vendorlib on Windows for
4816 * DLL-based path intuition to work correctly */
4817 # if !defined(WIN32)
4818 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4822 #ifdef PERL_VENDORLIB_EXP
4824 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4826 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4830 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4831 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4834 #ifdef PERL_OTHERLIBDIRS
4835 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4839 incpush(".", FALSE, FALSE, TRUE, FALSE);
4840 #endif /* MACOS_TRADITIONAL */
4843 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4844 # define PERLLIB_SEP ';'
4847 # define PERLLIB_SEP '|'
4849 # if defined(MACOS_TRADITIONAL)
4850 # define PERLLIB_SEP ','
4852 # define PERLLIB_SEP ':'
4856 #ifndef PERLLIB_MANGLE
4857 # define PERLLIB_MANGLE(s,n) (s)
4860 /* Push a directory onto @INC if it exists.
4861 Generate a new SV if we do this, to save needing to copy the SV we push
4864 S_incpush_if_exists(pTHX_ SV *dir)
4868 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4869 S_ISDIR(tmpstatbuf.st_mode)) {
4870 av_push(GvAVn(PL_incgv), dir);
4877 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4882 const char *p = dir;
4887 if (addsubdirs || addoldvers) {
4891 /* Break at all separators */
4893 SV *libdir = newSV(0);
4896 /* skip any consecutive separators */
4898 while ( *p == PERLLIB_SEP ) {
4899 /* Uncomment the next line for PATH semantics */
4900 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4905 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4906 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4911 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4912 p = NULL; /* break out */
4914 #ifdef MACOS_TRADITIONAL
4915 if (!strchr(SvPVX(libdir), ':')) {
4918 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4920 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4921 sv_catpvs(libdir, ":");
4924 /* Do the if() outside the #ifdef to avoid warnings about an unused
4927 #ifdef PERL_RELOCATABLE_INC
4929 * Relocatable include entries are marked with a leading .../
4932 * 0: Remove that leading ".../"
4933 * 1: Remove trailing executable name (anything after the last '/')
4934 * from the perl path to give a perl prefix
4936 * While the @INC element starts "../" and the prefix ends with a real
4937 * directory (ie not . or ..) chop that real directory off the prefix
4938 * and the leading "../" from the @INC element. ie a logical "../"
4940 * Finally concatenate the prefix and the remainder of the @INC element
4941 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4942 * generates /usr/local/lib/perl5
4944 const char *libpath = SvPVX(libdir);
4945 STRLEN libpath_len = SvCUR(libdir);
4946 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4948 SV * const caret_X = get_sv("\030", 0);
4949 /* Going to use the SV just as a scratch buffer holding a C
4955 /* $^X is *the* source of taint if tainting is on, hence
4956 SvPOK() won't be true. */
4958 assert(SvPOKp(caret_X));
4959 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4960 /* Firstly take off the leading .../
4961 If all else fail we'll do the paths relative to the current
4963 sv_chop(libdir, libpath + 4);
4964 /* Don't use SvPV as we're intentionally bypassing taining,
4965 mortal copies that the mg_get of tainting creates, and
4966 corruption that seems to come via the save stack.
4967 I guess that the save stack isn't correctly set up yet. */
4968 libpath = SvPVX(libdir);
4969 libpath_len = SvCUR(libdir);
4971 /* This would work more efficiently with memrchr, but as it's
4972 only a GNU extension we'd need to probe for it and
4973 implement our own. Not hard, but maybe not worth it? */
4975 prefix = SvPVX(prefix_sv);
4976 lastslash = strrchr(prefix, '/');
4978 /* First time in with the *lastslash = '\0' we just wipe off
4979 the trailing /perl from (say) /usr/foo/bin/perl
4983 while ((*lastslash = '\0'), /* Do that, come what may. */
4984 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4985 && (lastslash = strrchr(prefix, '/')))) {
4986 if (lastslash[1] == '\0'
4987 || (lastslash[1] == '.'
4988 && (lastslash[2] == '/' /* ends "/." */
4989 || (lastslash[2] == '/'
4990 && lastslash[3] == '/' /* or "/.." */
4992 /* Prefix ends "/" or "/." or "/..", any of which
4993 are fishy, so don't do any more logical cleanup.
4997 /* Remove leading "../" from path */
5000 /* Next iteration round the loop removes the last
5001 directory name from prefix by writing a '\0' in
5002 the while clause. */
5004 /* prefix has been terminated with a '\0' to the correct
5005 length. libpath points somewhere into the libdir SV.
5006 We need to join the 2 with '/' and drop the result into
5008 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5009 SvREFCNT_dec(libdir);
5010 /* And this is the new libdir. */
5013 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5014 /* Need to taint reloccated paths if running set ID */
5015 SvTAINTED_on(libdir);
5018 SvREFCNT_dec(prefix_sv);
5023 * BEFORE pushing libdir onto @INC we may first push version- and
5024 * archname-specific sub-directories.
5026 if (addsubdirs || addoldvers) {
5027 #ifdef PERL_INC_VERSION_LIST
5028 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5029 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5030 const char * const *incver;
5036 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5038 while (unix[len-1] == '/') len--; /* Cosmetic */
5039 sv_usepvn(libdir,unix,len);
5042 PerlIO_printf(Perl_error_log,
5043 "Failed to unixify @INC element \"%s\"\n",
5047 #ifdef MACOS_TRADITIONAL
5048 #define PERL_AV_SUFFIX_FMT ""
5049 #define PERL_ARCH_FMT "%s:"
5050 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5052 #define PERL_AV_SUFFIX_FMT "/"
5053 #define PERL_ARCH_FMT "/%s"
5054 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5056 /* .../version/archname if -d .../version/archname */
5057 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5059 (int)PERL_REVISION, (int)PERL_VERSION,
5060 (int)PERL_SUBVERSION, ARCHNAME);
5061 subdir = S_incpush_if_exists(aTHX_ subdir);
5063 /* .../version if -d .../version */
5064 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5065 (int)PERL_REVISION, (int)PERL_VERSION,
5066 (int)PERL_SUBVERSION);
5067 subdir = S_incpush_if_exists(aTHX_ subdir);
5069 /* .../archname if -d .../archname */
5070 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5071 subdir = S_incpush_if_exists(aTHX_ subdir);
5075 #ifdef PERL_INC_VERSION_LIST
5077 for (incver = incverlist; *incver; incver++) {
5078 /* .../xxx if -d .../xxx */
5079 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5080 subdir = S_incpush_if_exists(aTHX_ subdir);
5086 /* finally push this lib directory on the end of @INC */
5087 av_push(GvAVn(PL_incgv), libdir);
5090 assert (SvREFCNT(subdir) == 1);
5091 SvREFCNT_dec(subdir);
5097 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5101 const line_t oldline = CopLINE(PL_curcop);
5107 while (av_len(paramList) >= 0) {
5108 cv = (CV*)av_shift(paramList);
5110 if (paramList == PL_beginav) {
5111 /* save PL_beginav for compiler */
5112 if (! PL_beginav_save)
5113 PL_beginav_save = newAV();
5114 av_push(PL_beginav_save, (SV*)cv);
5116 else if (paramList == PL_checkav) {
5117 /* save PL_checkav for compiler */
5118 if (! PL_checkav_save)
5119 PL_checkav_save = newAV();
5120 av_push(PL_checkav_save, (SV*)cv);
5131 PL_madskills |= 16384;
5136 PL_madskills &= ~16384;
5139 (void)SvPV_const(atsv, len);
5140 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5141 break; /* not really trying to run, so just wing it */
5143 PL_curcop = &PL_compiling;
5144 CopLINE_set(PL_curcop, oldline);
5145 if (paramList == PL_beginav)
5146 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5148 Perl_sv_catpvf(aTHX_ atsv,
5149 "%s failed--call queue aborted",
5150 paramList == PL_checkav ? "CHECK"
5151 : paramList == PL_initav ? "INIT"
5153 while (PL_scopestack_ix > oldscope)
5156 Perl_croak(aTHX_ "%"SVf"", atsv);
5163 /* my_exit() was called */
5164 while (PL_scopestack_ix > oldscope)
5167 PL_curstash = PL_defstash;
5168 PL_curcop = &PL_compiling;
5169 CopLINE_set(PL_curcop, oldline);
5171 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5172 return; /* not really trying to run, so just wing it */
5173 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5174 if (paramList == PL_beginav)
5175 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5177 Perl_croak(aTHX_ "%s failed--call queue aborted",
5178 paramList == PL_checkav ? "CHECK"
5179 : paramList == PL_initav ? "INIT"
5186 PL_curcop = &PL_compiling;
5187 CopLINE_set(PL_curcop, oldline);
5190 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5199 S_call_list_body(pTHX_ CV *cv)
5202 PUSHMARK(PL_stack_sp);
5203 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5208 Perl_my_exit(pTHX_ U32 status)
5211 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5212 thr, (unsigned long) status));
5221 STATUS_EXIT_SET(status);
5228 Perl_my_failure_exit(pTHX)
5232 /* We have been called to fall on our sword. The desired exit code
5233 * should be already set in STATUS_UNIX, but could be shifted over
5234 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5237 * If an error code has not been set, then force the issue.
5239 if (MY_POSIX_EXIT) {
5241 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5242 * the exit code when there isn't an error.
5245 if (STATUS_UNIX == 0)
5246 STATUS_UNIX_EXIT_SET(255);
5248 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5250 /* The exit code could have been set by $? or vmsish which
5251 * means that it may not be fatal. So convert
5252 * success/warning codes to fatal.
5254 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5255 STATUS_UNIX_EXIT_SET(255);
5259 /* Traditionally Perl on VMS always expects a Fatal Error. */
5260 if (vaxc$errno & 1) {
5262 /* So force success status to failure */
5263 if (STATUS_NATIVE & 1)
5268 STATUS_UNIX = EINTR; /* In case something cares */
5273 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5275 /* Encode the severity code */
5276 severity = STATUS_NATIVE & STS$M_SEVERITY;
5277 STATUS_UNIX = (severity ? severity : 1) << 8;
5279 /* Perl expects this to be a fatal error */
5280 if (severity != STS$K_SEVERE)
5289 STATUS_UNIX_SET(errno);
5291 exitstatus = STATUS_UNIX >> 8;
5292 if (exitstatus & 255)
5293 STATUS_UNIX_SET(exitstatus);
5295 STATUS_UNIX_SET(255);
5302 S_my_exit_jump(pTHX)
5307 SvREFCNT_dec(PL_e_script);
5311 POPSTACK_TO(PL_mainstack);
5319 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5322 const char * const p = SvPVX_const(PL_e_script);
5323 const char *nl = strchr(p, '\n');
5325 PERL_UNUSED_ARG(idx);
5326 PERL_UNUSED_ARG(maxlen);
5328 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5330 filter_del(read_e_script);
5333 sv_catpvn(buf_sv, p, nl-p);
5334 sv_chop(PL_e_script, nl);
5340 * c-indentation-style: bsd
5342 * indent-tabs-mode: t
5345 * ex: set ts=8 sts=4 sw=4 noet: