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)
231 PERL_UNUSED_ARG(my_perl);
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)
410 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
412 Perl_dump_sv_child(pTHX_ SV *sv)
415 const int sock = PL_dumper_fd;
416 const int debug_fd = PerlIO_fileno(Perl_debug_log);
417 union control_un control;
420 struct cmsghdr *cmptr;
422 unsigned char buffer[256];
424 if(sock == -1 || debug_fd == -1)
427 PerlIO_flush(Perl_debug_log);
429 /* All these shenanigans are to pass a file descriptor over to our child for
430 it to dump out to. We can't let it hold open the file descriptor when it
431 forks, as the file descriptor it will dump to can turn out to be one end
432 of pipe that some other process will wait on for EOF. (So as it would
433 be open, the wait would be forever. */
435 msg.msg_control = control.control;
436 msg.msg_controllen = sizeof(control.control);
437 /* We're a connected socket so we don't need a destination */
443 cmptr = CMSG_FIRSTHDR(&msg);
444 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
445 cmptr->cmsg_level = SOL_SOCKET;
446 cmptr->cmsg_type = SCM_RIGHTS;
447 *((int *)CMSG_DATA(cmptr)) = 1;
449 vec[0].iov_base = (void*)&sv;
450 vec[0].iov_len = sizeof(sv);
451 got = sendmsg(sock, &msg, 0);
454 perror("Debug leaking scalars parent sendmsg failed");
457 if(got < sizeof(sv)) {
458 perror("Debug leaking scalars parent short sendmsg");
462 /* Return protocol is
464 unsigned char: length of location string (0 for empty)
465 unsigned char*: string (not terminated)
467 vec[0].iov_base = (void*)&returned_errno;
468 vec[0].iov_len = sizeof(returned_errno);
469 vec[1].iov_base = buffer;
472 got = readv(sock, vec, 2);
475 perror("Debug leaking scalars parent read failed");
476 PerlIO_flush(PerlIO_stderr());
479 if(got < sizeof(returned_errno) + 1) {
480 perror("Debug leaking scalars parent short read");
481 PerlIO_flush(PerlIO_stderr());
486 got = read(sock, buffer + 1, *buffer);
488 perror("Debug leaking scalars parent read 2 failed");
489 PerlIO_flush(PerlIO_stderr());
494 perror("Debug leaking scalars parent short read 2");
495 PerlIO_flush(PerlIO_stderr());
500 if (returned_errno || *buffer) {
501 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
502 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
503 returned_errno, strerror(returned_errno));
509 =for apidoc perl_destruct
511 Shuts down a Perl interpreter. See L<perlembed>.
520 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
522 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
526 PERL_UNUSED_ARG(my_perl);
528 /* wait for all pseudo-forked children to finish */
529 PERL_WAIT_FOR_CHILDREN;
531 destruct_level = PL_perl_destruct_level;
534 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
536 const int i = atoi(s);
537 if (destruct_level < i)
543 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
549 if (PL_endav && !PL_minus_c)
550 call_list(PL_scopestack_ix, PL_endav);
556 /* Need to flush since END blocks can produce output */
559 if (CALL_FPTR(PL_threadhook)(aTHX)) {
560 /* Threads hook has vetoed further cleanup */
564 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
565 if (destruct_level != 0) {
566 /* Fork here to create a child. Our child's job is to preserve the
567 state of scalars prior to destruction, so that we can instruct it
568 to dump any scalars that we later find have leaked.
569 There's no subtlety in this code - it assumes POSIX, and it doesn't
573 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
574 perror("Debug leaking scalars socketpair failed");
580 perror("Debug leaking scalars fork failed");
584 /* We are the child */
585 const int sock = fd[1];
586 const int debug_fd = PerlIO_fileno(Perl_debug_log);
589 /* Our success message is an integer 0, and a char 0 */
590 static const char success[sizeof(int) + 1];
594 /* We need to close all other file descriptors otherwise we end up
595 with interesting hangs, where the parent closes its end of a
596 pipe, and sits waiting for (another) child to terminate. Only
597 that child never terminates, because it never gets EOF, because
598 we also have the far end of the pipe open. We even need to
599 close the debugging fd, because sometimes it happens to be one
600 end of a pipe, and a process is waiting on the other end for
601 EOF. Normally it would be closed at some point earlier in
602 destruction, but if we happen to cause the pipe to remain open,
603 EOF never occurs, and we get an infinite hang. Hence all the
604 games to pass in a file descriptor if it's actually needed. */
606 f = sysconf(_SC_OPEN_MAX);
608 where = "sysconf failed";
619 union control_un control;
622 struct cmsghdr *cmptr;
626 msg.msg_control = control.control;
627 msg.msg_controllen = sizeof(control.control);
628 /* We're a connected socket so we don't need a source */
632 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
634 vec[0].iov_base = (void*)⌖
635 vec[0].iov_len = sizeof(target);
637 got = recvmsg(sock, &msg, 0);
642 where = "recv failed";
645 if(got < sizeof(target)) {
646 where = "short recv";
650 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
654 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
655 where = "wrong cmsg_len";
658 if(cmptr->cmsg_level != SOL_SOCKET) {
659 where = "wrong cmsg_level";
662 if(cmptr->cmsg_type != SCM_RIGHTS) {
663 where = "wrong cmsg_type";
667 got_fd = *(int*)CMSG_DATA(cmptr);
668 /* For our last little bit of trickery, put the file descriptor
669 back into Perl_debug_log, as if we never actually closed it
671 if(got_fd != debug_fd) {
672 if (dup2(got_fd, debug_fd) == -1) {
679 PerlIO_flush(Perl_debug_log);
681 got = write(sock, &success, sizeof(success));
684 where = "write failed";
687 if(got < sizeof(success)) {
688 where = "short write";
695 int send_errno = errno;
696 unsigned char length = (unsigned char) strlen(where);
697 struct iovec failure[3] = {
698 {(void*)&send_errno, sizeof(send_errno)},
700 {(void*)where, length}
702 int got = writev(sock, failure, 3);
703 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
704 in the parent if we try to read from the socketpair after the
705 child has exited, even if there was data to read.
706 So sleep a bit to give the parent a fighting chance of
709 _exit((got == -1) ? errno : 0);
713 PL_dumper_fd = fd[0];
718 /* We must account for everything. */
720 /* Destroy the main CV and syntax tree */
721 /* Do this now, because destroying ops can cause new SVs to be generated
722 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
723 PL_curcop to point to a valid op from which the filename structure
725 PL_curcop = &PL_compiling;
727 /* ensure comppad/curpad to refer to main's pad */
728 if (CvPADLIST(PL_main_cv)) {
729 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
731 op_free(PL_main_root);
732 PL_main_root = Nullop;
734 PL_main_start = Nullop;
735 SvREFCNT_dec(PL_main_cv);
739 /* Tell PerlIO we are about to tear things apart in case
740 we have layers which are using resources that should
744 PerlIO_destruct(aTHX);
746 if (PL_sv_objcount) {
748 * Try to destruct global references. We do this first so that the
749 * destructors and destructees still exist. Some sv's might remain.
750 * Non-referenced objects are on their own.
754 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
755 PL_defoutgv = NULL; /* may have been freed */
758 /* unhook hooks which will soon be, or use, destroyed data */
759 SvREFCNT_dec(PL_warnhook);
761 SvREFCNT_dec(PL_diehook);
764 /* call exit list functions */
765 while (PL_exitlistlen-- > 0)
766 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
768 Safefree(PL_exitlist);
773 if (destruct_level == 0){
775 DEBUG_P(debprofdump());
777 #if defined(PERLIO_LAYERS)
778 /* No more IO - including error messages ! */
779 PerlIO_cleanup(aTHX);
782 /* The exit() function will do everything that needs doing. */
786 /* jettison our possibly duplicated environment */
787 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
788 * so we certainly shouldn't free it here
791 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
792 if (environ != PL_origenviron && !PL_use_safe_putenv
794 /* only main thread can free environ[0] contents */
795 && PL_curinterp == aTHX
801 for (i = 0; environ[i]; i++)
802 safesysfree(environ[i]);
804 /* Must use safesysfree() when working with environ. */
805 safesysfree(environ);
807 environ = PL_origenviron;
810 #endif /* !PERL_MICRO */
812 /* reset so print() ends up where we expect */
816 /* the syntax tree is shared between clones
817 * so op_free(PL_main_root) only ReREFCNT_dec's
818 * REGEXPs in the parent interpreter
819 * we need to manually ReREFCNT_dec for the clones
822 I32 i = AvFILLp(PL_regex_padav) + 1;
823 SV * const * const ary = AvARRAY(PL_regex_padav);
826 SV * const resv = ary[--i];
828 if (SvFLAGS(resv) & SVf_BREAK) {
829 /* this is PL_reg_curpm, already freed
830 * flag is set in regexec.c:S_regtry
832 SvFLAGS(resv) &= ~SVf_BREAK;
834 else if(SvREPADTMP(resv)) {
835 SvREPADTMP_off(resv);
837 else if(SvIOKp(resv)) {
838 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
843 SvREFCNT_dec(PL_regex_padav);
844 PL_regex_padav = NULL;
848 SvREFCNT_dec((SV*) PL_stashcache);
849 PL_stashcache = NULL;
851 /* loosen bonds of global variables */
854 (void)PerlIO_close(PL_rsfp);
858 /* Filters for program text */
859 SvREFCNT_dec(PL_rsfp_filters);
860 PL_rsfp_filters = NULL;
863 PL_preprocess = FALSE;
869 PL_doswitches = FALSE;
870 PL_dowarn = G_WARN_OFF;
871 PL_doextract = FALSE;
872 PL_sawampersand = FALSE; /* must save all match strings */
875 Safefree(PL_inplace);
877 SvREFCNT_dec(PL_patchlevel);
880 SvREFCNT_dec(PL_e_script);
886 /* magical thingies */
888 SvREFCNT_dec(PL_ofs_sv); /* $, */
891 SvREFCNT_dec(PL_ors_sv); /* $\ */
894 SvREFCNT_dec(PL_rs); /* $/ */
897 PL_multiline = 0; /* $* */
898 Safefree(PL_osname); /* $^O */
901 SvREFCNT_dec(PL_statname);
905 /* defgv, aka *_ should be taken care of elsewhere */
907 /* clean up after study() */
908 SvREFCNT_dec(PL_lastscream);
909 PL_lastscream = NULL;
910 Safefree(PL_screamfirst);
912 Safefree(PL_screamnext);
916 Safefree(PL_efloatbuf);
920 /* startup and shutdown function lists */
921 SvREFCNT_dec(PL_beginav);
922 SvREFCNT_dec(PL_beginav_save);
923 SvREFCNT_dec(PL_endav);
924 SvREFCNT_dec(PL_checkav);
925 SvREFCNT_dec(PL_checkav_save);
926 SvREFCNT_dec(PL_initav);
928 PL_beginav_save = NULL;
931 PL_checkav_save = NULL;
934 /* shortcuts just get cleared */
943 PL_last_in_gv = NULL;
951 PL_DBassertion = NULL;
956 SvREFCNT_dec(PL_argvout_stack);
957 PL_argvout_stack = NULL;
959 SvREFCNT_dec(PL_modglobal);
961 SvREFCNT_dec(PL_preambleav);
962 PL_preambleav = NULL;
963 SvREFCNT_dec(PL_subname);
965 SvREFCNT_dec(PL_linestr);
967 #ifdef PERL_USES_PL_PIDSTATUS
968 SvREFCNT_dec(PL_pidstatus);
971 SvREFCNT_dec(PL_toptarget);
973 SvREFCNT_dec(PL_bodytarget);
974 PL_bodytarget = NULL;
975 PL_formtarget = NULL;
977 /* free locale stuff */
978 #ifdef USE_LOCALE_COLLATE
979 Safefree(PL_collation_name);
980 PL_collation_name = NULL;
983 #ifdef USE_LOCALE_NUMERIC
984 Safefree(PL_numeric_name);
985 PL_numeric_name = NULL;
986 SvREFCNT_dec(PL_numeric_radix_sv);
987 PL_numeric_radix_sv = NULL;
990 /* clear utf8 character classes */
991 SvREFCNT_dec(PL_utf8_alnum);
992 SvREFCNT_dec(PL_utf8_alnumc);
993 SvREFCNT_dec(PL_utf8_ascii);
994 SvREFCNT_dec(PL_utf8_alpha);
995 SvREFCNT_dec(PL_utf8_space);
996 SvREFCNT_dec(PL_utf8_cntrl);
997 SvREFCNT_dec(PL_utf8_graph);
998 SvREFCNT_dec(PL_utf8_digit);
999 SvREFCNT_dec(PL_utf8_upper);
1000 SvREFCNT_dec(PL_utf8_lower);
1001 SvREFCNT_dec(PL_utf8_print);
1002 SvREFCNT_dec(PL_utf8_punct);
1003 SvREFCNT_dec(PL_utf8_xdigit);
1004 SvREFCNT_dec(PL_utf8_mark);
1005 SvREFCNT_dec(PL_utf8_toupper);
1006 SvREFCNT_dec(PL_utf8_totitle);
1007 SvREFCNT_dec(PL_utf8_tolower);
1008 SvREFCNT_dec(PL_utf8_tofold);
1009 SvREFCNT_dec(PL_utf8_idstart);
1010 SvREFCNT_dec(PL_utf8_idcont);
1011 PL_utf8_alnum = NULL;
1012 PL_utf8_alnumc = NULL;
1013 PL_utf8_ascii = NULL;
1014 PL_utf8_alpha = NULL;
1015 PL_utf8_space = NULL;
1016 PL_utf8_cntrl = NULL;
1017 PL_utf8_graph = NULL;
1018 PL_utf8_digit = NULL;
1019 PL_utf8_upper = NULL;
1020 PL_utf8_lower = NULL;
1021 PL_utf8_print = NULL;
1022 PL_utf8_punct = NULL;
1023 PL_utf8_xdigit = NULL;
1024 PL_utf8_mark = NULL;
1025 PL_utf8_toupper = NULL;
1026 PL_utf8_totitle = NULL;
1027 PL_utf8_tolower = NULL;
1028 PL_utf8_tofold = NULL;
1029 PL_utf8_idstart = NULL;
1030 PL_utf8_idcont = NULL;
1032 if (!specialWARN(PL_compiling.cop_warnings))
1033 SvREFCNT_dec(PL_compiling.cop_warnings);
1034 PL_compiling.cop_warnings = NULL;
1035 if (!specialCopIO(PL_compiling.cop_io))
1036 SvREFCNT_dec(PL_compiling.cop_io);
1037 PL_compiling.cop_io = NULL;
1038 CopFILE_free(&PL_compiling);
1039 CopSTASH_free(&PL_compiling);
1041 /* Prepare to destruct main symbol table. */
1046 SvREFCNT_dec(PL_curstname);
1047 PL_curstname = NULL;
1049 /* clear queued errors */
1050 SvREFCNT_dec(PL_errors);
1054 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1055 if (PL_scopestack_ix != 0)
1056 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1057 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1058 (long)PL_scopestack_ix);
1059 if (PL_savestack_ix != 0)
1060 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1061 "Unbalanced saves: %ld more saves than restores\n",
1062 (long)PL_savestack_ix);
1063 if (PL_tmps_floor != -1)
1064 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1065 (long)PL_tmps_floor + 1);
1066 if (cxstack_ix != -1)
1067 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1068 (long)cxstack_ix + 1);
1071 /* Now absolutely destruct everything, somehow or other, loops or no. */
1072 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1073 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1075 /* the 2 is for PL_fdpid and PL_strtab */
1076 while (PL_sv_count > 2 && sv_clean_all())
1079 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1080 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1081 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1082 SvFLAGS(PL_strtab) |= SVt_PVHV;
1084 AvREAL_off(PL_fdpid); /* no surviving entries */
1085 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1088 #ifdef HAVE_INTERP_INTERN
1092 /* Destruct the global string table. */
1094 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1095 * so that sv_free() won't fail on them.
1096 * Now that the global string table is using a single hunk of memory
1097 * for both HE and HEK, we either need to explicitly unshare it the
1098 * correct way, or actually free things here.
1101 const I32 max = HvMAX(PL_strtab);
1102 HE * const * const array = HvARRAY(PL_strtab);
1103 HE *hent = array[0];
1106 if (hent && ckWARN_d(WARN_INTERNAL)) {
1107 HE * const next = HeNEXT(hent);
1108 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1109 "Unbalanced string table refcount: (%ld) for \"%s\"",
1110 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1117 hent = array[riter];
1122 HvARRAY(PL_strtab) = 0;
1123 HvTOTALKEYS(PL_strtab) = 0;
1124 HvFILL(PL_strtab) = 0;
1126 SvREFCNT_dec(PL_strtab);
1129 /* free the pointer tables used for cloning */
1130 ptr_table_free(PL_ptr_table);
1131 PL_ptr_table = (PTR_TBL_t*)NULL;
1134 /* free special SVs */
1136 SvREFCNT(&PL_sv_yes) = 0;
1137 sv_clear(&PL_sv_yes);
1138 SvANY(&PL_sv_yes) = NULL;
1139 SvFLAGS(&PL_sv_yes) = 0;
1141 SvREFCNT(&PL_sv_no) = 0;
1142 sv_clear(&PL_sv_no);
1143 SvANY(&PL_sv_no) = NULL;
1144 SvFLAGS(&PL_sv_no) = 0;
1148 for (i=0; i<=2; i++) {
1149 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1150 sv_clear(PERL_DEBUG_PAD(i));
1151 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1152 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1156 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1157 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1159 #ifdef DEBUG_LEAKING_SCALARS
1160 if (PL_sv_count != 0) {
1165 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1166 svend = &sva[SvREFCNT(sva)];
1167 for (sv = sva + 1; sv < svend; ++sv) {
1168 if (SvTYPE(sv) != SVTYPEMASK) {
1169 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1171 " refcnt=%"UVuf pTHX__FORMAT "\n"
1172 "\tallocated at %s:%d %s %s%s\n",
1173 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1174 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1176 sv->sv_debug_inpad ? "for" : "by",
1177 sv->sv_debug_optype ?
1178 PL_op_name[sv->sv_debug_optype]: "(none)",
1179 sv->sv_debug_cloned ? " (cloned)" : ""
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1182 Perl_dump_sv_child(aTHX_ sv);
1188 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1192 /* Wait for up to 4 seconds for child to terminate.
1193 This seems to be the least effort way of timing out on reaping
1195 struct timeval waitfor = {4, 0};
1196 int sock = PL_dumper_fd;
1200 FD_SET(sock, &rset);
1201 select(sock + 1, &rset, NULL, NULL, &waitfor);
1202 waitpid(child, &status, WNOHANG);
1210 #if defined(PERLIO_LAYERS)
1211 /* No more IO - including error messages ! */
1212 PerlIO_cleanup(aTHX);
1215 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1216 as currently layers use it rather than NULL as a marker
1217 for no arg - and will try and SvREFCNT_dec it.
1219 SvREFCNT(&PL_sv_undef) = 0;
1220 SvREADONLY_off(&PL_sv_undef);
1222 Safefree(PL_origfilename);
1223 PL_origfilename = NULL;
1224 Safefree(PL_reg_start_tmp);
1225 PL_reg_start_tmp = (char**)NULL;
1226 PL_reg_start_tmpl = 0;
1227 Safefree(PL_reg_curpm);
1228 Safefree(PL_reg_poscache);
1229 free_tied_hv_pool();
1230 Safefree(PL_op_mask);
1231 Safefree(PL_psig_ptr);
1232 PL_psig_ptr = (SV**)NULL;
1233 Safefree(PL_psig_name);
1234 PL_psig_name = (SV**)NULL;
1235 Safefree(PL_bitcount);
1237 Safefree(PL_psig_pend);
1238 PL_psig_pend = (int*)NULL;
1241 PL_tainting = FALSE;
1242 PL_taint_warn = FALSE;
1243 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1246 DEBUG_P(debprofdump());
1248 #ifdef USE_REENTRANT_API
1249 Perl_reentrant_free(aTHX);
1254 /* As the absolutely last thing, free the non-arena SV for mess() */
1257 /* we know that type == SVt_PVMG */
1259 /* it could have accumulated taint magic */
1262 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1263 moremagic = mg->mg_moremagic;
1264 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1266 Safefree(mg->mg_ptr);
1270 /* we know that type >= SVt_PV */
1271 SvPV_free(PL_mess_sv);
1272 Safefree(SvANY(PL_mess_sv));
1273 Safefree(PL_mess_sv);
1280 =for apidoc perl_free
1282 Releases a Perl interpreter. See L<perlembed>.
1290 #ifdef PERL_TRACK_MEMPOOL
1291 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1292 thread at thread exit. */
1293 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1294 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1297 #if defined(WIN32) || defined(NETWARE)
1298 # if defined(PERL_IMPLICIT_SYS)
1301 void *host = nw_internal_host;
1303 void *host = w32_internal_host;
1305 PerlMem_free(aTHXx);
1307 nw_delete_internal_host(host);
1309 win32_delete_internal_host(host);
1313 PerlMem_free(aTHXx);
1316 PerlMem_free(aTHXx);
1320 #if defined(USE_ITHREADS)
1321 /* provide destructors to clean up the thread key when libperl is unloaded */
1322 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1324 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1325 #pragma fini "perl_fini"
1329 #if defined(__GNUC__)
1330 __attribute__((destructor))
1340 #endif /* THREADS */
1343 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1346 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1347 PL_exitlist[PL_exitlistlen].fn = fn;
1348 PL_exitlist[PL_exitlistlen].ptr = ptr;
1352 #ifdef HAS_PROCSELFEXE
1353 /* This is a function so that we don't hold on to MAXPATHLEN
1354 bytes of stack longer than necessary
1357 S_procself_val(pTHX_ SV *sv, const char *arg0)
1359 char buf[MAXPATHLEN];
1360 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1362 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1363 includes a spurious NUL which will cause $^X to fail in system
1364 or backticks (this will prevent extensions from being built and
1365 many tests from working). readlink is not meant to add a NUL.
1366 Normal readlink works fine.
1368 if (len > 0 && buf[len-1] == '\0') {
1372 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1373 returning the text "unknown" from the readlink rather than the path
1374 to the executable (or returning an error from the readlink). Any valid
1375 path has a '/' in it somewhere, so use that to validate the result.
1376 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1378 if (len > 0 && memchr(buf, '/', len)) {
1379 sv_setpvn(sv,buf,len);
1385 #endif /* HAS_PROCSELFEXE */
1388 S_set_caret_X(pTHX) {
1390 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1392 #ifdef HAS_PROCSELFEXE
1393 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1396 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1398 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1405 =for apidoc perl_parse
1407 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1413 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1420 PERL_UNUSED_VAR(my_perl);
1422 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1425 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1426 setuid perl scripts securely.\n");
1427 #endif /* IAMSUID */
1430 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1431 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1432 * This MUST be done before any hash stores or fetches take place.
1433 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1434 * yourself, it is your responsibility to provide a good random seed!
1435 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1436 if (!PL_rehash_seed_set)
1437 PL_rehash_seed = get_hash_seed();
1439 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1441 if (s && (atoi(s) == 1))
1442 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1444 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1449 if (PL_origalen != 0) {
1450 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1453 /* Set PL_origalen be the sum of the contiguous argv[]
1454 * elements plus the size of the env in case that it is
1455 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1456 * as the maximum modifiable length of $0. In the worst case
1457 * the area we are able to modify is limited to the size of
1458 * the original argv[0]. (See below for 'contiguous', though.)
1460 const char *s = NULL;
1463 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1464 /* Do the mask check only if the args seem like aligned. */
1466 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1468 /* See if all the arguments are contiguous in memory. Note
1469 * that 'contiguous' is a loose term because some platforms
1470 * align the argv[] and the envp[]. If the arguments look
1471 * like non-aligned, assume that they are 'strictly' or
1472 * 'traditionally' contiguous. If the arguments look like
1473 * aligned, we just check that they are within aligned
1474 * PTRSIZE bytes. As long as no system has something bizarre
1475 * like the argv[] interleaved with some other data, we are
1476 * fine. (Did I just evoke Murphy's Law?) --jhi */
1477 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1479 for (i = 1; i < PL_origargc; i++) {
1480 if ((PL_origargv[i] == s + 1
1482 || PL_origargv[i] == s + 2
1487 (PL_origargv[i] > s &&
1489 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1499 /* Can we grab env area too to be used as the area for $0? */
1500 if (s && PL_origenviron) {
1501 if ((PL_origenviron[0] == s + 1
1503 || (PL_origenviron[0] == s + 9 && (s += 8))
1508 (PL_origenviron[0] > s &&
1509 PL_origenviron[0] <=
1510 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1514 s = PL_origenviron[0];
1517 my_setenv("NoNe SuCh", NULL);
1518 /* Force copy of environment. */
1519 for (i = 1; PL_origenviron[i]; i++) {
1520 if (PL_origenviron[i] == s + 1
1523 (PL_origenviron[i] > s &&
1524 PL_origenviron[i] <=
1525 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 s = PL_origenviron[i];
1536 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1541 /* Come here if running an undumped a.out. */
1543 PL_origfilename = savepv(argv[0]);
1544 PL_do_undump = FALSE;
1545 cxstack_ix = -1; /* start label stack again */
1547 assert (!PL_tainted);
1549 S_set_caret_X(aTHX);
1551 init_postdump_symbols(argc,argv,env);
1556 op_free(PL_main_root);
1557 PL_main_root = Nullop;
1559 PL_main_start = Nullop;
1560 SvREFCNT_dec(PL_main_cv);
1564 oldscope = PL_scopestack_ix;
1565 PL_dowarn = G_WARN_OFF;
1570 parse_body(env,xsinit);
1572 call_list(oldscope, PL_checkav);
1579 /* my_exit() was called */
1580 while (PL_scopestack_ix > oldscope)
1583 PL_curstash = PL_defstash;
1585 call_list(oldscope, PL_checkav);
1589 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1598 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1601 int argc = PL_origargc;
1602 char **argv = PL_origargv;
1603 const char *scriptname = NULL;
1604 VOL bool dosearch = FALSE;
1605 const char *validarg = "";
1608 const char *cddir = NULL;
1609 #ifdef USE_SITECUSTOMIZE
1610 bool minus_f = FALSE;
1613 sv_setpvn(PL_linestr,"",0);
1614 sv = newSVpvs(""); /* first used for -I flags */
1618 for (argc--,argv++; argc > 0; argc--,argv++) {
1619 if (argv[0][0] != '-' || !argv[0][1])
1623 validarg = " PHOOEY ";
1627 * Can we rely on the kernel to start scripts with argv[1] set to
1628 * contain all #! line switches (the whole line)? (argv[0] is set to
1629 * the interpreter name, argv[2] to the script name; argv[3] and
1630 * above may contain other arguments.)
1637 #ifndef PERL_STRICT_CR
1662 if ((s = moreswitches(s)))
1667 CHECK_MALLOC_TOO_LATE_FOR('t');
1668 if( !PL_tainting ) {
1669 PL_taint_warn = TRUE;
1675 CHECK_MALLOC_TOO_LATE_FOR('T');
1677 PL_taint_warn = FALSE;
1685 #ifdef MACOS_TRADITIONAL
1686 /* ignore -e for Dev:Pseudo argument */
1687 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1690 forbid_setid('e', -1);
1692 PL_e_script = newSVpvs("");
1693 filter_add(read_e_script, NULL);
1696 sv_catpv(PL_e_script, s);
1698 sv_catpv(PL_e_script, argv[1]);
1702 Perl_croak(aTHX_ "No code specified for -%c", *s);
1703 sv_catpvs(PL_e_script, "\n");
1707 #ifdef USE_SITECUSTOMIZE
1713 case 'I': /* -I handled both here and in moreswitches() */
1714 forbid_setid('I', -1);
1715 if (!*++s && (s=argv[1]) != NULL) {
1719 STRLEN len = strlen(s);
1720 const char * const p = savepvn(s, len);
1721 incpush(p, TRUE, TRUE, FALSE, FALSE);
1722 sv_catpvs(sv, "-I");
1723 sv_catpvn(sv, p, len);
1728 Perl_croak(aTHX_ "No directory specified for -I");
1731 forbid_setid('P', -1);
1732 PL_preprocess = TRUE;
1736 forbid_setid('S', -1);
1745 PL_preambleav = newAV();
1746 av_push(PL_preambleav,
1747 newSVpvs("use Config;"));
1751 opts_prog = newSVpvs("print Config::myconfig(),");
1753 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1755 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1757 opts = SvCUR(opts_prog);
1759 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1763 # ifdef DEBUG_LEAKING_SCALARS
1764 " DEBUG_LEAKING_SCALARS"
1766 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1767 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1769 # ifdef FAKE_THREADS
1772 # ifdef MULTIPLICITY
1781 # ifdef PERL_DONT_CREATE_GVSV
1782 " PERL_DONT_CREATE_GVSV"
1784 # ifdef PERL_GLOBAL_STRUCT
1785 " PERL_GLOBAL_STRUCT"
1787 # ifdef PERL_IMPLICIT_CONTEXT
1788 " PERL_IMPLICIT_CONTEXT"
1790 # ifdef PERL_IMPLICIT_SYS
1791 " PERL_IMPLICIT_SYS"
1793 # ifdef PERL_MALLOC_WRAP
1796 # ifdef PERL_NEED_APPCTX
1799 # ifdef PERL_NEED_TIMESBASE
1800 " PERL_NEED_TIMESBASE"
1802 # ifdef PERL_OLD_COPY_ON_WRITE
1803 " PERL_OLD_COPY_ON_WRITE"
1805 # ifdef PERL_TRACK_MEMPOOL
1806 " PERL_TRACK_MEMPOOL"
1808 # ifdef PERL_USE_SAFE_PUTENV
1809 " PERL_USE_SAFE_PUTENV"
1811 #ifdef PERL_USES_PL_PIDSTATUS
1812 " PERL_USES_PL_PIDSTATUS"
1814 # ifdef PL_OP_SLAB_ALLOC
1817 # ifdef THREADS_HAVE_PIDS
1818 " THREADS_HAVE_PIDS"
1820 # ifdef USE_64_BIT_ALL
1823 # ifdef USE_64_BIT_INT
1826 # ifdef USE_ITHREADS
1829 # ifdef USE_LARGE_FILES
1832 # ifdef USE_LONG_DOUBLE
1838 # ifdef USE_REENTRANT_API
1839 " USE_REENTRANT_API"
1844 # ifdef USE_SITECUSTOMIZE
1845 " USE_SITECUSTOMIZE"
1852 while (SvCUR(opts_prog) > opts+76) {
1853 /* find last space after "options: " and before col 76
1857 char * const pv = SvPV_nolen(opts_prog);
1858 const char c = pv[opts+76];
1860 space = strrchr(pv+opts+26, ' ');
1862 if (!space) break; /* "Can't happen" */
1864 /* break the line before that space */
1867 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1868 STR_WITH_LEN("\\n "));
1871 sv_catpvs(opts_prog,"\\n\",");
1873 #if defined(LOCAL_PATCH_COUNT)
1874 if (LOCAL_PATCH_COUNT > 0) {
1876 sv_catpvs(opts_prog,
1877 "\" Locally applied patches:\\n\",");
1878 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1879 if (PL_localpatches[i])
1880 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1881 0, PL_localpatches[i], 0);
1885 Perl_sv_catpvf(aTHX_ opts_prog,
1886 "\" Built under %s\\n\"",OSNAME);
1889 Perl_sv_catpvf(aTHX_ opts_prog,
1890 ",\" Compiled at %s %s\\n\"",__DATE__,
1893 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1897 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1898 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1899 "sort grep {/^PERL/} keys %ENV; ");
1901 sv_catpvs(opts_prog,
1902 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1904 sv_catpvs(opts_prog,
1905 "print \" \\%ENV:\\n @env\\n\" if @env;"
1906 "print \" \\@INC:\\n @INC\\n\";");
1910 opts_prog = Perl_newSVpvf(aTHX_
1911 "Config::config_vars(qw%c%s%c)",
1915 av_push(PL_preambleav, opts_prog);
1916 /* don't look for script or read stdin */
1917 scriptname = BIT_BUCKET;
1921 PL_doextract = TRUE;
1929 if (!*++s || isSPACE(*s)) {
1933 /* catch use of gnu style long options */
1934 if (strEQ(s, "version")) {
1938 if (strEQ(s, "help")) {
1945 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1951 #ifndef SECURE_INTERNAL_GETENV
1954 (s = PerlEnv_getenv("PERL5OPT")))
1956 const char *popt = s;
1959 if (*s == '-' && *(s+1) == 'T') {
1960 CHECK_MALLOC_TOO_LATE_FOR('T');
1962 PL_taint_warn = FALSE;
1965 char *popt_copy = NULL;
1978 if (!strchr("CDIMUdmtwA", *s))
1979 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1983 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1984 s = popt_copy + (s - popt);
1985 d = popt_copy + (d - popt);
1992 if( !PL_tainting ) {
1993 PL_taint_warn = TRUE;
2003 #ifdef USE_SITECUSTOMIZE
2006 PL_preambleav = newAV();
2007 av_unshift(PL_preambleav, 1);
2008 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2012 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2013 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2017 scriptname = argv[0];
2020 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2022 else if (scriptname == NULL) {
2024 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2030 /* Set $^X early so that it can be used for relocatable paths in @INC */
2031 assert (!PL_tainted);
2033 S_set_caret_X(aTHX);
2040 = open_script(scriptname, dosearch, sv, &suidscript);
2042 validate_suid(validarg, scriptname, fdscript, suidscript);
2045 # if defined(SIGCHLD) || defined(SIGCLD)
2048 # define SIGCHLD SIGCLD
2050 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2051 if (sigstate == (Sighandler_t) SIG_IGN) {
2052 if (ckWARN(WARN_SIGNAL))
2053 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2054 "Can't ignore signal CHLD, forcing to default");
2055 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2062 #ifdef MACOS_TRADITIONAL
2063 || gMacPerl_AlwaysExtract
2067 /* This will croak if suidscript is >= 0, as -x cannot be used with
2069 forbid_setid('x', suidscript);
2070 /* Hence you can't get here if suidscript >= 0 */
2073 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2074 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2078 PL_main_cv = PL_compcv = (CV*)newSV(0);
2079 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2080 CvUNIQUE_on(PL_compcv);
2082 CvPADLIST(PL_compcv) = pad_new(0);
2085 boot_core_UNIVERSAL();
2086 boot_core_xsutils();
2089 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2091 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2097 # ifdef HAS_SOCKS5_INIT
2098 socks5_init(argv[0]);
2104 init_predump_symbols();
2105 /* init_postdump_symbols not currently designed to be called */
2106 /* more than once (ENV isn't cleared first, for example) */
2107 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2109 init_postdump_symbols(argc,argv,env);
2111 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2112 * or explicitly in some platforms.
2113 * locale.c:Perl_init_i18nl10n() if the environment
2114 * look like the user wants to use UTF-8. */
2115 #if defined(__SYMBIAN32__)
2116 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2119 /* Requires init_predump_symbols(). */
2120 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2125 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2126 * and the default open disciplines. */
2127 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2128 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2130 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2131 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2132 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2134 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2135 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2136 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2138 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2139 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2140 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2142 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2143 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2146 sv_setpvn(sv, ":utf8\0:utf8", 11);
2148 sv_setpvn(sv, ":utf8\0", 6);
2151 sv_setpvn(sv, "\0:utf8", 6);
2157 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2158 if (strEQ(s, "unsafe"))
2159 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2160 else if (strEQ(s, "safe"))
2161 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2163 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2168 /* now parse the script */
2170 SETERRNO(0,SS_NORMAL);
2172 #ifdef MACOS_TRADITIONAL
2173 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2175 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2177 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2178 MacPerl_MPWFileName(PL_origfilename));
2182 if (yyparse() || PL_error_count) {
2184 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2186 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2191 CopLINE_set(PL_curcop, 0);
2192 PL_curstash = PL_defstash;
2193 PL_preprocess = FALSE;
2195 SvREFCNT_dec(PL_e_script);
2203 SAVECOPFILE(PL_curcop);
2204 SAVECOPLINE(PL_curcop);
2205 gv_check(PL_defstash);
2212 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2213 dump_mstats("after compilation:");
2222 =for apidoc perl_run
2224 Tells a Perl interpreter to run. See L<perlembed>.
2237 PERL_UNUSED_ARG(my_perl);
2239 oldscope = PL_scopestack_ix;
2247 cxstack_ix = -1; /* start context stack again */
2249 case 0: /* normal completion */
2253 case 2: /* my_exit() */
2254 while (PL_scopestack_ix > oldscope)
2257 PL_curstash = PL_defstash;
2258 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2259 PL_endav && !PL_minus_c)
2260 call_list(oldscope, PL_endav);
2262 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2263 dump_mstats("after execution: ");
2269 POPSTACK_TO(PL_mainstack);
2272 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2284 S_run_body(pTHX_ I32 oldscope)
2287 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2288 PL_sawampersand ? "Enabling" : "Omitting"));
2290 if (!PL_restartop) {
2291 DEBUG_x(dump_all());
2294 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2296 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2300 #ifdef MACOS_TRADITIONAL
2301 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2302 (gMacPerl_ErrorFormat ? "# " : ""),
2303 MacPerl_MPWFileName(PL_origfilename));
2305 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2309 if (PERLDB_SINGLE && PL_DBsingle)
2310 sv_setiv(PL_DBsingle, 1);
2312 call_list(oldscope, PL_initav);
2318 PL_op = PL_restartop;
2322 else if (PL_main_start) {
2323 CvDEPTH(PL_main_cv) = 1;
2324 PL_op = PL_main_start;
2332 =head1 SV Manipulation Functions
2334 =for apidoc p||get_sv
2336 Returns the SV of the specified Perl scalar. If C<create> is set and the
2337 Perl variable does not exist then it will be created. If C<create> is not
2338 set and the variable does not exist then NULL is returned.
2344 Perl_get_sv(pTHX_ const char *name, I32 create)
2347 gv = gv_fetchpv(name, create, SVt_PV);
2354 =head1 Array Manipulation Functions
2356 =for apidoc p||get_av
2358 Returns the AV of the specified Perl array. If C<create> is set and the
2359 Perl variable does not exist then it will be created. If C<create> is not
2360 set and the variable does not exist then NULL is returned.
2366 Perl_get_av(pTHX_ const char *name, I32 create)
2368 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2377 =head1 Hash Manipulation Functions
2379 =for apidoc p||get_hv
2381 Returns the HV of the specified Perl hash. If C<create> is set and the
2382 Perl variable does not exist then it will be created. If C<create> is not
2383 set and the variable does not exist then NULL is returned.
2389 Perl_get_hv(pTHX_ const char *name, I32 create)
2391 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2400 =head1 CV Manipulation Functions
2402 =for apidoc p||get_cv
2404 Returns the CV of the specified Perl subroutine. If C<create> is set and
2405 the Perl subroutine does not exist then it will be declared (which has the
2406 same effect as saying C<sub name;>). If C<create> is not set and the
2407 subroutine does not exist then NULL is returned.
2413 Perl_get_cv(pTHX_ const char *name, I32 create)
2415 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2416 /* XXX unsafe for threads if eval_owner isn't held */
2417 /* XXX this is probably not what they think they're getting.
2418 * It has the same effect as "sub name;", i.e. just a forward
2420 if (create && !GvCVu(gv))
2421 return newSUB(start_subparse(FALSE, 0),
2422 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2430 /* Be sure to refetch the stack pointer after calling these routines. */
2434 =head1 Callback Functions
2436 =for apidoc p||call_argv
2438 Performs a callback to the specified Perl sub. See L<perlcall>.
2444 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2446 /* See G_* flags in cop.h */
2447 /* null terminated arg list */
2455 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2460 return call_pv(sub_name, flags);
2464 =for apidoc p||call_pv
2466 Performs a callback to the specified Perl sub. See L<perlcall>.
2472 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2473 /* name of the subroutine */
2474 /* See G_* flags in cop.h */
2476 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2480 =for apidoc p||call_method
2482 Performs a callback to the specified Perl method. The blessed object must
2483 be on the stack. See L<perlcall>.
2489 Perl_call_method(pTHX_ const char *methname, I32 flags)
2490 /* name of the subroutine */
2491 /* See G_* flags in cop.h */
2493 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2496 /* May be called with any of a CV, a GV, or an SV containing the name. */
2498 =for apidoc p||call_sv
2500 Performs a callback to the Perl sub whose name is in the SV. See
2507 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2508 /* See G_* flags in cop.h */
2511 LOGOP myop; /* fake syntax tree node */
2514 volatile I32 retval = 0;
2516 bool oldcatch = CATCH_GET;
2518 OP* const oldop = PL_op;
2521 if (flags & G_DISCARD) {
2526 Zero(&myop, 1, LOGOP);
2527 myop.op_next = Nullop;
2528 if (!(flags & G_NOARGS))
2529 myop.op_flags |= OPf_STACKED;
2530 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2531 (flags & G_ARRAY) ? OPf_WANT_LIST :
2536 EXTEND(PL_stack_sp, 1);
2537 *++PL_stack_sp = sv;
2539 oldscope = PL_scopestack_ix;
2541 if (PERLDB_SUB && PL_curstash != PL_debstash
2542 /* Handle first BEGIN of -d. */
2543 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2544 /* Try harder, since this may have been a sighandler, thus
2545 * curstash may be meaningless. */
2546 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2547 && !(flags & G_NODEBUG))
2548 PL_op->op_private |= OPpENTERSUB_DB;
2550 if (flags & G_METHOD) {
2551 Zero(&method_op, 1, UNOP);
2552 method_op.op_next = PL_op;
2553 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2554 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2555 PL_op = (OP*)&method_op;
2558 if (!(flags & G_EVAL)) {
2560 call_body((OP*)&myop, FALSE);
2561 retval = PL_stack_sp - (PL_stack_base + oldmark);
2562 CATCH_SET(oldcatch);
2565 myop.op_other = (OP*)&myop;
2567 /* we're trying to emulate pp_entertry() here */
2569 register PERL_CONTEXT *cx;
2570 const I32 gimme = GIMME_V;
2575 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2577 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2579 PL_in_eval = EVAL_INEVAL;
2580 if (flags & G_KEEPERR)
2581 PL_in_eval |= EVAL_KEEPERR;
2583 sv_setpvn(ERRSV,"",0);
2591 call_body((OP*)&myop, FALSE);
2592 retval = PL_stack_sp - (PL_stack_base + oldmark);
2593 if (!(flags & G_KEEPERR))
2594 sv_setpvn(ERRSV,"",0);
2600 /* my_exit() was called */
2601 PL_curstash = PL_defstash;
2604 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2605 Perl_croak(aTHX_ "Callback called exit");
2610 PL_op = PL_restartop;
2614 PL_stack_sp = PL_stack_base + oldmark;
2615 if (flags & G_ARRAY)
2619 *++PL_stack_sp = &PL_sv_undef;
2624 if (PL_scopestack_ix > oldscope) {
2628 register PERL_CONTEXT *cx;
2635 PERL_UNUSED_VAR(newsp);
2636 PERL_UNUSED_VAR(gimme);
2637 PERL_UNUSED_VAR(optype);
2642 if (flags & G_DISCARD) {
2643 PL_stack_sp = PL_stack_base + oldmark;
2653 S_call_body(pTHX_ const OP *myop, bool is_eval)
2656 if (PL_op == myop) {
2658 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2660 PL_op = Perl_pp_entersub(aTHX); /* this does */
2666 /* Eval a string. The G_EVAL flag is always assumed. */
2669 =for apidoc p||eval_sv
2671 Tells Perl to C<eval> the string in the SV.
2677 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2679 /* See G_* flags in cop.h */
2683 UNOP myop; /* fake syntax tree node */
2684 volatile I32 oldmark = SP - PL_stack_base;
2685 volatile I32 retval = 0;
2687 OP* const oldop = PL_op;
2690 if (flags & G_DISCARD) {
2697 Zero(PL_op, 1, UNOP);
2698 EXTEND(PL_stack_sp, 1);
2699 *++PL_stack_sp = sv;
2701 if (!(flags & G_NOARGS))
2702 myop.op_flags = OPf_STACKED;
2703 myop.op_next = Nullop;
2704 myop.op_type = OP_ENTEREVAL;
2705 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2706 (flags & G_ARRAY) ? OPf_WANT_LIST :
2708 if (flags & G_KEEPERR)
2709 myop.op_flags |= OPf_SPECIAL;
2711 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2712 * before a PUSHEVAL, which corrupts the stack after a croak */
2713 TAINT_PROPER("eval_sv()");
2719 call_body((OP*)&myop,TRUE);
2720 retval = PL_stack_sp - (PL_stack_base + oldmark);
2721 if (!(flags & G_KEEPERR))
2722 sv_setpvn(ERRSV,"",0);
2728 /* my_exit() was called */
2729 PL_curstash = PL_defstash;
2732 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2733 Perl_croak(aTHX_ "Callback called exit");
2738 PL_op = PL_restartop;
2742 PL_stack_sp = PL_stack_base + oldmark;
2743 if (flags & G_ARRAY)
2747 *++PL_stack_sp = &PL_sv_undef;
2753 if (flags & G_DISCARD) {
2754 PL_stack_sp = PL_stack_base + oldmark;
2764 =for apidoc p||eval_pv
2766 Tells Perl to C<eval> the given string and return an SV* result.
2772 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2776 SV* sv = newSVpv(p, 0);
2778 eval_sv(sv, G_SCALAR);
2785 if (croak_on_error && SvTRUE(ERRSV)) {
2786 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2792 /* Require a module. */
2795 =head1 Embedding Functions
2797 =for apidoc p||require_pv
2799 Tells Perl to C<require> the file named by the string argument. It is
2800 analogous to the Perl code C<eval "require '$file'">. It's even
2801 implemented that way; consider using load_module instead.
2806 Perl_require_pv(pTHX_ const char *pv)
2811 PUSHSTACKi(PERLSI_REQUIRE);
2813 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2814 eval_sv(sv_2mortal(sv), G_DISCARD);
2820 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2822 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2825 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2829 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2831 /* This message really ought to be max 23 lines.
2832 * Removed -h because the user already knows that option. Others? */
2834 static const char * const usage_msg[] = {
2835 "-0[octal] specify record separator (\\0, if no argument)",
2836 "-A[mod][=pattern] activate all/given assertions",
2837 "-a autosplit mode with -n or -p (splits $_ into @F)",
2838 "-C[number/list] enables the listed Unicode features",
2839 "-c check syntax only (runs BEGIN and CHECK blocks)",
2840 "-d[:debugger] run program under debugger",
2841 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2842 "-e program one line of program (several -e's allowed, omit programfile)",
2843 "-E program like -e, but enables all optional features",
2844 "-f don't do $sitelib/sitecustomize.pl at startup",
2845 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2846 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2847 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2848 "-l[octal] enable line ending processing, specifies line terminator",
2849 "-[mM][-]module execute \"use/no module...\" before executing program",
2850 "-n assume \"while (<>) { ... }\" loop around program",
2851 "-p assume loop like -n but print line also, like sed",
2852 "-P run program through C preprocessor before compilation",
2853 "-s enable rudimentary parsing for switches after programfile",
2854 "-S look for programfile using PATH environment variable",
2855 "-t enable tainting warnings",
2856 "-T enable tainting checks",
2857 "-u dump core after parsing program",
2858 "-U allow unsafe operations",
2859 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2860 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2861 "-w enable many useful warnings (RECOMMENDED)",
2862 "-W enable all warnings",
2863 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2864 "-X disable all warnings",
2868 const char * const *p = usage_msg;
2870 PerlIO_printf(PerlIO_stdout(),
2871 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2874 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2877 /* convert a string of -D options (or digits) into an int.
2878 * sets *s to point to the char after the options */
2882 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2884 static const char * const usage_msgd[] = {
2885 " Debugging flag values: (see also -d)",
2886 " p Tokenizing and parsing (with v, displays parse stack)",
2887 " s Stack snapshots (with v, displays all stacks)",
2888 " l Context (loop) stack processing",
2889 " t Trace execution",
2890 " o Method and overloading resolution",
2891 " c String/numeric conversions",
2892 " P Print profiling info, preprocessor command for -P, source file input state",
2893 " m Memory allocation",
2894 " f Format processing",
2895 " r Regular expression parsing and execution",
2896 " x Syntax tree dump",
2897 " u Tainting checks",
2898 " H Hash dump -- usurps values()",
2899 " X Scratchpad allocation",
2901 " S Thread synchronization",
2903 " R Include reference counts of dumped variables (eg when using -Ds)",
2904 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2905 " v Verbose: use in conjunction with other flags",
2907 " A Consistency checks on internal structures",
2908 " q quiet - currently only suppresses the 'EXECUTING' message",
2913 /* if adding extra options, remember to update DEBUG_MASK */
2914 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2916 for (; isALNUM(**s); (*s)++) {
2917 const char * const d = strchr(debopts,**s);
2919 i |= 1 << (d - debopts);
2920 else if (ckWARN_d(WARN_DEBUGGING))
2921 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2922 "invalid option -D%c, use -D'' to see choices\n", **s);
2925 else if (isDIGIT(**s)) {
2927 for (; isALNUM(**s); (*s)++) ;
2929 else if (givehelp) {
2930 const char *const *p = usage_msgd;
2931 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2934 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2935 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2936 "-Dp not implemented on this platform\n");
2942 /* This routine handles any switches that can be given during run */
2945 Perl_moreswitches(pTHX_ char *s)
2956 SvREFCNT_dec(PL_rs);
2957 if (s[1] == 'x' && s[2]) {
2958 const char *e = s+=2;
2964 flags = PERL_SCAN_SILENT_ILLDIGIT;
2965 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2966 if (s + numlen < e) {
2967 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2971 PL_rs = newSVpvs("");
2972 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2973 tmps = (U8*)SvPVX(PL_rs);
2974 uvchr_to_utf8(tmps, rschar);
2975 SvCUR_set(PL_rs, UNISKIP(rschar));
2980 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2981 if (rschar & ~((U8)~0))
2982 PL_rs = &PL_sv_undef;
2983 else if (!rschar && numlen >= 2)
2984 PL_rs = newSVpvs("");
2986 char ch = (char)rschar;
2987 PL_rs = newSVpvn(&ch, 1);
2990 sv_setsv(get_sv("/", TRUE), PL_rs);
2995 PL_unicode = parse_unicode_opts( (const char **)&s );
3000 while (*s && !isSPACE(*s)) ++s;
3002 PL_splitstr = savepv(PL_splitstr);
3013 forbid_setid('d', -1);
3016 /* -dt indicates to the debugger that threads will be used */
3017 if (*s == 't' && !isALNUM(s[1])) {
3019 my_setenv("PERL5DB_THREADED", "1");
3022 /* The following permits -d:Mod to accepts arguments following an =
3023 in the fashion that -MSome::Mod does. */
3024 if (*s == ':' || *s == '=') {
3026 SV * const sv = newSVpvs("use Devel::");
3028 /* We now allow -d:Module=Foo,Bar */
3029 while(isALNUM(*s) || *s==':') ++s;
3031 sv_catpv(sv, start);
3033 sv_catpvn(sv, start, s-start);
3034 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3037 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3040 PL_perldb = PERLDB_ALL;
3047 forbid_setid('D', -1);
3049 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3050 #else /* !DEBUGGING */
3051 if (ckWARN_d(WARN_DEBUGGING))
3052 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3053 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3054 for (s++; isALNUM(*s); s++) ;
3059 usage(PL_origargv[0]);
3062 Safefree(PL_inplace);
3063 #if defined(__CYGWIN__) /* do backup extension automagically */
3064 if (*(s+1) == '\0') {
3065 PL_inplace = savepvs(".bak");
3068 #endif /* __CYGWIN__ */
3069 PL_inplace = savepv(s+1);
3070 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3074 if (*s == '-') /* Additional switches on #! line. */
3078 case 'I': /* -I handled both here and in parse_body() */
3079 forbid_setid('I', -1);
3081 while (*s && isSPACE(*s))
3086 /* ignore trailing spaces (possibly followed by other switches) */
3088 for (e = p; *e && !isSPACE(*e); e++) ;
3092 } while (*p && *p != '-');
3093 e = savepvn(s, e-s);
3094 incpush(e, TRUE, TRUE, FALSE, FALSE);
3101 Perl_croak(aTHX_ "No directory specified for -I");
3107 SvREFCNT_dec(PL_ors_sv);
3113 PL_ors_sv = newSVpvs("\n");
3114 numlen = 3 + (*s == '0');
3115 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3119 if (RsPARA(PL_rs)) {
3120 PL_ors_sv = newSVpvs("\n\n");
3123 PL_ors_sv = newSVsv(PL_rs);
3128 forbid_setid('A', -1);
3130 PL_preambleav = newAV();
3133 char * const start = s;
3134 SV * const sv = newSVpvs("use assertions::activate");
3135 while(isALNUM(*s) || *s == ':') ++s;
3137 sv_catpvs(sv, "::");
3138 sv_catpvn(sv, start, s-start);
3141 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3144 else if (*s != '\0') {
3145 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3147 av_push(PL_preambleav, sv);
3151 forbid_setid('M', -1); /* XXX ? */
3154 forbid_setid('m', -1); /* XXX ? */
3158 const char *use = "use ";
3159 /* -M-foo == 'no foo' */
3160 /* Leading space on " no " is deliberate, to make both
3161 possibilities the same length. */
3162 if (*s == '-') { use = " no "; ++s; }
3163 sv = newSVpvn(use,4);
3165 /* We allow -M'Module qw(Foo Bar)' */
3166 while(isALNUM(*s) || *s==':') ++s;
3168 sv_catpv(sv, start);
3169 if (*(start-1) == 'm') {
3171 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3172 sv_catpvs( sv, " ()");
3176 Perl_croak(aTHX_ "Module name required with -%c option",
3178 sv_catpvn(sv, start, s-start);
3179 sv_catpvs(sv, " split(/,/,q");
3180 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3182 sv_catpvs(sv, "\0)");
3186 PL_preambleav = newAV();
3187 av_push(PL_preambleav, sv);
3190 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3201 forbid_setid('s', -1);
3202 PL_doswitches = TRUE;
3216 #ifdef MACOS_TRADITIONAL
3217 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3219 PL_do_undump = TRUE;
3227 if (!sv_derived_from(PL_patchlevel, "version"))
3228 upg_version(PL_patchlevel);
3230 PerlIO_printf(PerlIO_stdout(),
3231 Perl_form(aTHX_ "\nThis is perl, %"SVf
3232 #ifdef PERL_PATCHNUM
3233 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3236 vstringify(PL_patchlevel),
3239 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3240 PerlIO_printf(PerlIO_stdout(),
3241 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3242 vstringify(PL_patchlevel)));
3243 PerlIO_printf(PerlIO_stdout(),
3244 Perl_form(aTHX_ " built under %s at %s %s\n",
3245 OSNAME, __DATE__, __TIME__));
3246 PerlIO_printf(PerlIO_stdout(),
3247 Perl_form(aTHX_ " OS Specific Release: %s\n",
3251 #if defined(LOCAL_PATCH_COUNT)
3252 if (LOCAL_PATCH_COUNT > 0)
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\n(with %d registered patch%s, "
3255 "see perl -V for more detail)",
3256 (int)LOCAL_PATCH_COUNT,
3257 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n\nCopyright 1987-2006, Larry Wall\n");
3262 #ifdef MACOS_TRADITIONAL
3263 PerlIO_printf(PerlIO_stdout(),
3264 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3265 "maintained by Chris Nandor\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3274 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3279 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "atariST series port, ++jrb bammi@cadence.com\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "MiNT port by Guido Flohr, 1997-1999\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "EPOC port by Olaf Flebbe, 1999-2002\n");
3318 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3319 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3322 #ifdef __SYMBIAN32__
3323 PerlIO_printf(PerlIO_stdout(),
3324 "Symbian port by Nokia, 2004-2005\n");
3326 #ifdef BINARY_BUILD_NOTICE
3327 BINARY_BUILD_NOTICE;
3329 PerlIO_printf(PerlIO_stdout(),
3331 Perl may be copied only under the terms of either the Artistic License or the\n\
3332 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3333 Complete documentation for Perl, including FAQ lists, should be found on\n\
3334 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3335 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3338 if (! (PL_dowarn & G_WARN_ALL_MASK))
3339 PL_dowarn |= G_WARN_ON;
3343 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3344 if (!specialWARN(PL_compiling.cop_warnings))
3345 SvREFCNT_dec(PL_compiling.cop_warnings);
3346 PL_compiling.cop_warnings = pWARN_ALL ;
3350 PL_dowarn = G_WARN_ALL_OFF;
3351 if (!specialWARN(PL_compiling.cop_warnings))
3352 SvREFCNT_dec(PL_compiling.cop_warnings);
3353 PL_compiling.cop_warnings = pWARN_NONE ;
3358 if (s[1] == '-') /* Additional switches on #! line. */
3363 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3369 #ifdef ALTERNATE_SHEBANG
3370 case 'S': /* OS/2 needs -S on "extproc" line. */
3378 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3383 /* compliments of Tom Christiansen */
3385 /* unexec() can be found in the Gnu emacs distribution */
3386 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3389 Perl_my_unexec(pTHX)
3397 prog = newSVpv(BIN_EXP, 0);
3398 sv_catpvs(prog, "/perl");
3399 file = newSVpv(PL_origfilename, 0);
3400 sv_catpvs(file, ".perldump");
3402 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3403 /* unexec prints msg to stderr in case of failure */
3404 PerlProc_exit(status);
3407 # include <lib$routines.h>
3408 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3409 # elif defined(WIN32) || defined(__CYGWIN__)
3410 Perl_croak(aTHX_ "dump is not supported");
3412 ABORT(); /* for use with undump */
3417 /* initialize curinterp */
3423 # define PERLVAR(var,type)
3424 # define PERLVARA(var,n,type)
3425 # if defined(PERL_IMPLICIT_CONTEXT)
3426 # define PERLVARI(var,type,init) aTHX->var = init;
3427 # define PERLVARIC(var,type,init) aTHX->var = init;
3429 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3430 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3432 # include "intrpvar.h"
3433 # include "thrdvar.h"
3439 # define PERLVAR(var,type)
3440 # define PERLVARA(var,n,type)
3441 # define PERLVARI(var,type,init) PL_##var = init;
3442 # define PERLVARIC(var,type,init) PL_##var = init;
3443 # include "intrpvar.h"
3444 # include "thrdvar.h"
3454 S_init_main_stash(pTHX)
3459 PL_curstash = PL_defstash = newHV();
3460 /* We know that the string "main" will be in the global shared string
3461 table, so it's a small saving to use it rather than allocate another
3463 PL_curstname = newSVpvs_share("main");
3464 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3465 /* If we hadn't caused another reference to "main" to be in the shared
3466 string table above, then it would be worth reordering these two,
3467 because otherwise all we do is delete "main" from it as a consequence
3468 of the SvREFCNT_dec, only to add it again with hv_name_set */
3469 SvREFCNT_dec(GvHV(gv));
3470 hv_name_set(PL_defstash, "main", 4, 0);
3471 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3473 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3475 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3476 GvMULTI_on(PL_incgv);
3477 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3478 GvMULTI_on(PL_hintgv);
3479 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3480 SvREFCNT_inc(PL_defgv);
3481 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3482 SvREFCNT_inc(PL_errgv);
3483 GvMULTI_on(PL_errgv);
3484 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3485 GvMULTI_on(PL_replgv);
3486 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3487 #ifdef PERL_DONT_CREATE_GVSV
3490 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3491 sv_setpvn(ERRSV, "", 0);
3492 PL_curstash = PL_defstash;
3493 CopSTASH_set(&PL_compiling, PL_defstash);
3494 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3495 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3497 /* We must init $/ before switches are processed. */
3498 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3502 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3508 const char *cpp_discard_flag;
3517 PL_origfilename = savepvs("-e");
3520 /* if find_script() returns, it returns a malloc()-ed value */
3521 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3523 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3524 const char *s = scriptname + 8;
3530 * Tell apart "normal" usage of fdscript, e.g.
3531 * with bash on FreeBSD:
3532 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3533 * from usage in suidperl.
3534 * Does any "normal" usage leave garbage after the number???
3535 * Is it a mistake to use a similar /dev/fd/ construct for
3540 * Be supersafe and do some sanity-checks.
3541 * Still, can we be sure we got the right thing?
3544 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3547 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3549 scriptname = savepv(s + 1);
3550 Safefree(PL_origfilename);
3551 PL_origfilename = (char *)scriptname;
3556 CopFILE_free(PL_curcop);
3557 CopFILE_set(PL_curcop, PL_origfilename);
3558 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3559 scriptname = (char *)"";
3560 if (fdscript >= 0) {
3561 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3562 # if defined(HAS_FCNTL) && defined(F_SETFD)
3564 /* ensure close-on-exec */
3565 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3570 Perl_croak(aTHX_ "sperl needs fd script\n"
3571 "You should not call sperl directly; do you need to "
3572 "change a #! line\nfrom sperl to perl?\n");
3575 * Do not open (or do other fancy stuff) while setuid.
3576 * Perl does the open, and hands script to suidperl on a fd;
3577 * suidperl only does some checks, sets up UIDs and re-execs
3578 * perl with that fd as it has always done.
3581 if (*suidscript != 1) {
3582 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3585 else if (PL_preprocess) {
3586 const char * const cpp_cfg = CPPSTDIN;
3587 SV * const cpp = newSVpvs("");
3588 SV * const cmd = newSV(0);
3590 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3591 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3592 if (strEQ(cpp_cfg, "cppstdin"))
3593 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3594 sv_catpv(cpp, cpp_cfg);
3597 sv_catpvs(sv, "-I");
3598 sv_catpv(sv,PRIVLIB_EXP);
3601 DEBUG_P(PerlIO_printf(Perl_debug_log,
3602 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3603 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3606 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3613 cpp_discard_flag = "";
3615 cpp_discard_flag = "-C";
3619 perl = os2_execname(aTHX);
3621 perl = PL_origargv[0];
3625 /* This strips off Perl comments which might interfere with
3626 the C pre-processor, including #!. #line directives are
3627 deliberately stripped to avoid confusion with Perl's version
3628 of #line. FWP played some golf with it so it will fit
3629 into VMS's 255 character buffer.
3632 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3634 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3636 Perl_sv_setpvf(aTHX_ cmd, "\
3637 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3638 perl, quote, code, quote, scriptname, cpp,
3639 cpp_discard_flag, sv, CPPMINUS);
3641 PL_doextract = FALSE;
3643 DEBUG_P(PerlIO_printf(Perl_debug_log,
3644 "PL_preprocess: cmd=\"%s\"\n",
3647 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3651 else if (!*scriptname) {
3652 forbid_setid(0, *suidscript);
3653 PL_rsfp = PerlIO_stdin();
3656 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3657 # if defined(HAS_FCNTL) && defined(F_SETFD)
3659 /* ensure close-on-exec */
3660 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3663 #endif /* IAMSUID */
3665 /* PSz 16 Sep 03 Keep neat error message */
3667 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3669 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3670 CopFILE(PL_curcop), Strerror(errno));
3676 * I_SYSSTATVFS HAS_FSTATVFS
3678 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3679 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3680 * here so that metaconfig picks them up. */
3684 S_fd_on_nosuid_fs(pTHX_ int fd)
3687 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3688 * but is needed also on machines without setreuid.
3689 * Seems safe enough to run as root.
3691 int check_okay = 0; /* able to do all the required sys/libcalls */
3692 int on_nosuid = 0; /* the fd is on a nosuid fs */
3694 * Need to check noexec also: nosuid might not be set, the average
3695 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3697 int on_noexec = 0; /* the fd is on a noexec fs */
3700 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3701 * fstatvfs() is UNIX98.
3702 * fstatfs() is 4.3 BSD.
3703 * ustat()+getmnt() is pre-4.3 BSD.
3704 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3705 * an irrelevant filesystem while trying to reach the right one.
3708 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3710 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3711 defined(HAS_FSTATVFS)
3712 # define FD_ON_NOSUID_CHECK_OKAY
3713 struct statvfs stfs;
3715 check_okay = fstatvfs(fd, &stfs) == 0;
3716 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3718 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3719 on platforms where it is present. */
3720 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3722 # endif /* fstatvfs */
3724 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3725 defined(PERL_MOUNT_NOSUID) && \
3726 defined(PERL_MOUNT_NOEXEC) && \
3727 defined(HAS_FSTATFS) && \
3728 defined(HAS_STRUCT_STATFS) && \
3729 defined(HAS_STRUCT_STATFS_F_FLAGS)
3730 # define FD_ON_NOSUID_CHECK_OKAY
3733 check_okay = fstatfs(fd, &stfs) == 0;
3734 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3735 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3736 # endif /* fstatfs */
3738 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3739 defined(PERL_MOUNT_NOSUID) && \
3740 defined(PERL_MOUNT_NOEXEC) && \
3741 defined(HAS_FSTAT) && \
3742 defined(HAS_USTAT) && \
3743 defined(HAS_GETMNT) && \
3744 defined(HAS_STRUCT_FS_DATA) && \
3746 # define FD_ON_NOSUID_CHECK_OKAY
3749 if (fstat(fd, &fdst) == 0) {
3751 if (ustat(fdst.st_dev, &us) == 0) {
3753 /* NOSTAT_ONE here because we're not examining fields which
3754 * vary between that case and STAT_ONE. */
3755 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3756 size_t cmplen = sizeof(us.f_fname);
3757 if (sizeof(fsd.fd_req.path) < cmplen)
3758 cmplen = sizeof(fsd.fd_req.path);
3759 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3760 fdst.st_dev == fsd.fd_req.dev) {
3762 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3763 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3768 # endif /* fstat+ustat+getmnt */
3770 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3771 defined(HAS_GETMNTENT) && \
3772 defined(HAS_HASMNTOPT) && \
3773 defined(MNTOPT_NOSUID) && \
3774 defined(MNTOPT_NOEXEC)
3775 # define FD_ON_NOSUID_CHECK_OKAY
3776 FILE *mtab = fopen("/etc/mtab", "r");
3777 struct mntent *entry;
3780 if (mtab && (fstat(fd, &stb) == 0)) {
3781 while (entry = getmntent(mtab)) {
3782 if (stat(entry->mnt_dir, &fsb) == 0
3783 && fsb.st_dev == stb.st_dev)
3785 /* found the filesystem */
3787 if (hasmntopt(entry, MNTOPT_NOSUID))
3789 if (hasmntopt(entry, MNTOPT_NOEXEC))
3792 } /* A single fs may well fail its stat(). */
3797 # endif /* getmntent+hasmntopt */
3800 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3802 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3804 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3805 return ((!check_okay) || on_nosuid || on_noexec);
3807 #endif /* IAMSUID */
3810 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3811 int fdscript, int suidscript)
3816 #endif /* IAMSUID */
3818 /* do we need to emulate setuid on scripts? */
3820 /* This code is for those BSD systems that have setuid #! scripts disabled
3821 * in the kernel because of a security problem. Merely defining DOSUID
3822 * in perl will not fix that problem, but if you have disabled setuid
3823 * scripts in the kernel, this will attempt to emulate setuid and setgid
3824 * on scripts that have those now-otherwise-useless bits set. The setuid
3825 * root version must be called suidperl or sperlN.NNN. If regular perl
3826 * discovers that it has opened a setuid script, it calls suidperl with
3827 * the same argv that it had. If suidperl finds that the script it has
3828 * just opened is NOT setuid root, it sets the effective uid back to the
3829 * uid. We don't just make perl setuid root because that loses the
3830 * effective uid we had before invoking perl, if it was different from the
3833 * Description/comments above do not match current workings:
3834 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3835 * suidperl called with script open and name changed to /dev/fd/N/X;
3836 * suidperl croaks if script is not setuid;
3837 * making perl setuid would be a huge security risk (and yes, that
3838 * would lose any euid we might have had).
3840 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3841 * be defined in suidperl only. suidperl must be setuid root. The
3842 * Configure script will set this up for you if you want it.
3848 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3849 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3850 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3852 const char *linestr;
3856 if (fdscript < 0 || suidscript != 1)
3857 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3859 * Since the script is opened by perl, not suidperl, some of these
3860 * checks are superfluous. Leaving them in probably does not lower
3864 * Do checks even for systems with no HAS_SETREUID.
3865 * We used to swap, then re-swap UIDs with
3867 if (setreuid(PL_euid,PL_uid) < 0
3868 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3869 Perl_croak(aTHX_ "Can't swap uid and euid");
3872 if (setreuid(PL_uid,PL_euid) < 0
3873 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3874 Perl_croak(aTHX_ "Can't reswap uid and euid");
3878 /* On this access check to make sure the directories are readable,
3879 * there is actually a small window that the user could use to make
3880 * filename point to an accessible directory. So there is a faint
3881 * chance that someone could execute a setuid script down in a
3882 * non-accessible directory. I don't know what to do about that.
3883 * But I don't think it's too important. The manual lies when
3884 * it says access() is useful in setuid programs.
3886 * So, access() is pretty useless... but not harmful... do anyway.
3888 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3889 Perl_croak(aTHX_ "Can't access() script\n");
3892 /* If we can swap euid and uid, then we can determine access rights
3893 * with a simple stat of the file, and then compare device and
3894 * inode to make sure we did stat() on the same file we opened.
3895 * Then we just have to make sure he or she can execute it.
3898 * As the script is opened by perl, not suidperl, we do not need to
3899 * care much about access rights.
3901 * The 'script changed' check is needed, or we can get lied to
3902 * about $0 with e.g.
3903 * suidperl /dev/fd/4//bin/x 4<setuidscript
3904 * Without HAS_SETREUID, is it safe to stat() as root?
3906 * Are there any operating systems that pass /dev/fd/xxx for setuid
3907 * scripts, as suggested/described in perlsec(1)? Surely they do not
3908 * pass the script name as we do, so the "script changed" test would
3909 * fail for them... but we never get here with
3910 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3912 * This is one place where we must "lie" about return status: not
3913 * say if the stat() failed. We are doing this as root, and could
3914 * be tricked into reporting existence or not of files that the
3915 * "plain" user cannot even see.
3919 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3920 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3921 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3922 Perl_croak(aTHX_ "Setuid script changed\n");
3926 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3927 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3930 * We used to do this check as the "plain" user (after swapping
3931 * UIDs). But the check for nosuid and noexec filesystem is needed,
3932 * and should be done even without HAS_SETREUID. (Maybe those
3933 * operating systems do not have such mount options anyway...)
3934 * Seems safe enough to do as root.
3936 #if !defined(NO_NOSUID_CHECK)
3937 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3938 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3941 #endif /* IAMSUID */
3943 if (!S_ISREG(PL_statbuf.st_mode)) {
3944 Perl_croak(aTHX_ "Setuid script not plain file\n");
3946 if (PL_statbuf.st_mode & S_IWOTH)
3947 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3948 PL_doswitches = FALSE; /* -s is insecure in suid */
3949 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3950 CopLINE_inc(PL_curcop);
3951 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3952 Perl_croak(aTHX_ "No #! line");
3953 linestr = SvPV_nolen_const(PL_linestr);
3954 /* required even on Sys V */
3955 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3956 Perl_croak(aTHX_ "No #! line");
3960 /* Sanity check on line length */
3961 s_end = s + strlen(s);
3962 if (s_end == s || (s_end - s) > 4000)
3963 Perl_croak(aTHX_ "Very long #! line");
3964 /* Allow more than a single space after #! */
3965 while (isSPACE(*s)) s++;
3966 /* Sanity check on buffer end */
3967 while ((*s) && !isSPACE(*s)) s++;
3968 for (s2 = s; (s2 > linestr &&
3969 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3970 || s2[-1] == '-')); s2--) ;
3971 /* Sanity check on buffer start */
3972 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3973 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3974 Perl_croak(aTHX_ "Not a perl script");
3975 while (*s == ' ' || *s == '\t') s++;
3977 * #! arg must be what we saw above. They can invoke it by
3978 * mentioning suidperl explicitly, but they may not add any strange
3979 * arguments beyond what #! says if they do invoke suidperl that way.
3982 * The way validarg was set up, we rely on the kernel to start
3983 * scripts with argv[1] set to contain all #! line switches (the
3987 * Check that we got all the arguments listed in the #! line (not
3988 * just that there are no extraneous arguments). Might not matter
3989 * much, as switches from #! line seem to be acted upon (also), and
3990 * so may be checked and trapped in perl. But, security checks must
3991 * be done in suidperl and not deferred to perl. Note that suidperl
3992 * does not get around to parsing (and checking) the switches on
3993 * the #! line (but execs perl sooner).
3994 * Allow (require) a trailing newline (which may be of two
3995 * characters on some architectures?) (but no other trailing
3998 len = strlen(validarg);
3999 if (strEQ(validarg," PHOOEY ") ||
4000 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4001 !((s_end - s) == len+1
4002 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4003 Perl_croak(aTHX_ "Args must match #! line");
4007 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4008 PL_euid == PL_statbuf.st_uid)
4010 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4011 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4012 #endif /* IAMSUID */
4015 PL_euid) { /* oops, we're not the setuid root perl */
4017 * When root runs a setuid script, we do not go through the same
4018 * steps of execing sperl and then perl with fd scripts, but
4019 * simply set up UIDs within the same perl invocation; so do
4020 * not have the same checks (on options, whatever) that we have
4021 * for plain users. No problem really: would have to be a script
4022 * that does not actually work for plain users; and if root is
4023 * foolish and can be persuaded to run such an unsafe script, he
4024 * might run also non-setuid ones, and deserves what he gets.
4026 * Or, we might drop the PL_euid check above (and rely just on
4027 * fdscript to avoid loops), and do the execs
4033 * Pass fd script to suidperl.
4034 * Exec suidperl, substituting fd script for scriptname.
4035 * Pass script name as "subdir" of fd, which perl will grok;
4036 * in fact will use that to distinguish this from "normal"
4037 * usage, see comments above.
4039 PerlIO_rewind(PL_rsfp);
4040 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4041 /* PSz 27 Feb 04 Sanity checks on scriptname */
4042 if ((!scriptname) || (!*scriptname) ) {
4043 Perl_croak(aTHX_ "No setuid script name\n");
4045 if (*scriptname == '-') {
4046 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4047 /* Or we might confuse it with an option when replacing
4048 * name in argument list, below (though we do pointer, not
4049 * string, comparisons).
4052 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4053 if (!PL_origargv[which]) {
4054 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4056 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4057 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4058 #if defined(HAS_FCNTL) && defined(F_SETFD)
4059 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4062 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4063 (int)PERL_REVISION, (int)PERL_VERSION,
4064 (int)PERL_SUBVERSION), PL_origargv);
4066 #endif /* IAMSUID */
4067 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4070 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4072 * This seems back to front: we try HAS_SETEGID first; if not available
4073 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4074 * in the sense that we only want to set EGID; but are there any machines
4075 * with either of the latter, but not the former? Same with UID, later.
4078 (void)setegid(PL_statbuf.st_gid);
4081 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4083 #ifdef HAS_SETRESGID
4084 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4086 PerlProc_setgid(PL_statbuf.st_gid);
4090 if (PerlProc_getegid() != PL_statbuf.st_gid)
4091 Perl_croak(aTHX_ "Can't do setegid!\n");
4093 if (PL_statbuf.st_mode & S_ISUID) {
4094 if (PL_statbuf.st_uid != PL_euid)
4096 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4099 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4101 #ifdef HAS_SETRESUID
4102 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4104 PerlProc_setuid(PL_statbuf.st_uid);
4108 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4109 Perl_croak(aTHX_ "Can't do seteuid!\n");
4111 else if (PL_uid) { /* oops, mustn't run as root */
4113 (void)seteuid((Uid_t)PL_uid);
4116 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4118 #ifdef HAS_SETRESUID
4119 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4121 PerlProc_setuid((Uid_t)PL_uid);
4125 if (PerlProc_geteuid() != PL_uid)
4126 Perl_croak(aTHX_ "Can't do seteuid!\n");
4129 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4130 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4133 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4134 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4135 else if (fdscript < 0 || suidscript != 1)
4136 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4137 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4139 /* PSz 16 Sep 03 Keep neat error message */
4140 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4143 /* We absolutely must clear out any saved ids here, so we */
4144 /* exec the real perl, substituting fd script for scriptname. */
4145 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4147 * It might be thought that using setresgid and/or setresuid (changed to
4148 * set the saved IDs) above might obviate the need to exec, and we could
4149 * go on to "do the perl thing".
4151 * Is there such a thing as "saved GID", and is that set for setuid (but
4152 * not setgid) execution like suidperl? Without exec, it would not be
4153 * cleared for setuid (but not setgid) scripts (or might need a dummy
4156 * We need suidperl to do the exact same argument checking that perl
4157 * does. Thus it cannot be very small; while it could be significantly
4158 * smaller, it is safer (simpler?) to make it essentially the same
4159 * binary as perl (but they are not identical). - Maybe could defer that
4160 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4161 * but prefer to do thorough checks in suidperl itself. Such deferral
4162 * would make suidperl security rely on perl, a design no-no.
4164 * Setuid things should be short and simple, thus easy to understand and
4165 * verify. They should do their "own thing", without influence by
4166 * attackers. It may help if their internal execution flow is fixed,
4167 * regardless of platform: it may be best to exec anyway.
4169 * Suidperl should at least be conceptually simple: a wrapper only,
4170 * never to do any real perl. Maybe we should put
4172 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4174 * into the perly bits.
4176 PerlIO_rewind(PL_rsfp);
4177 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4179 * Keep original arguments: suidperl already has fd script.
4181 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4182 /* if (!PL_origargv[which]) { */
4183 /* errno = EPERM; */
4184 /* Perl_croak(aTHX_ "Permission denied\n"); */
4186 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4187 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4188 #if defined(HAS_FCNTL) && defined(F_SETFD)
4189 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4192 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4193 (int)PERL_REVISION, (int)PERL_VERSION,
4194 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4196 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4197 #endif /* IAMSUID */
4199 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4200 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4201 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4202 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4204 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4207 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4208 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4209 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4210 /* not set-id, must be wrapped */
4218 S_find_beginning(pTHX)
4222 register const char *s2;
4223 #ifdef MACOS_TRADITIONAL
4227 /* skip forward in input to the real script? */
4229 #ifdef MACOS_TRADITIONAL
4230 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4232 while (PL_doextract || gMacPerl_AlwaysExtract) {
4233 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4234 if (!gMacPerl_AlwaysExtract)
4235 Perl_croak(aTHX_ "No Perl script found in input\n");
4237 if (PL_doextract) /* require explicit override ? */
4238 if (!OverrideExtract(PL_origfilename))
4239 Perl_croak(aTHX_ "User aborted script\n");
4241 PL_doextract = FALSE;
4243 /* Pater peccavi, file does not have #! */
4244 PerlIO_rewind(PL_rsfp);
4249 while (PL_doextract) {
4250 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4251 Perl_croak(aTHX_ "No Perl script found in input\n");
4254 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4255 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4256 PL_doextract = FALSE;
4257 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4259 while (*s == ' ' || *s == '\t') s++;
4261 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4262 || s2[-1] == '_') s2--;
4263 if (strnEQ(s2-4,"perl",4))
4264 while ((s = moreswitches(s)))
4267 #ifdef MACOS_TRADITIONAL
4268 /* We are always searching for the #!perl line in MacPerl,
4269 * so if we find it, still keep the line count correct
4270 * by counting lines we already skipped over
4272 for (; maclines > 0 ; maclines--)
4273 PerlIO_ungetc(PL_rsfp, '\n');
4277 /* gMacPerl_AlwaysExtract is false in MPW tool */
4278 } else if (gMacPerl_AlwaysExtract) {
4290 PL_uid = PerlProc_getuid();
4291 PL_euid = PerlProc_geteuid();
4292 PL_gid = PerlProc_getgid();
4293 PL_egid = PerlProc_getegid();
4295 PL_uid |= PL_gid << 16;
4296 PL_euid |= PL_egid << 16;
4298 /* Should not happen: */
4299 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4300 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4303 * Should go by suidscript, not uid!=euid: why disallow
4304 * system("ls") in scripts run from setuid things?
4305 * Or, is this run before we check arguments and set suidscript?
4306 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4307 * (We never have suidscript, can we be sure to have fdscript?)
4308 * Or must then go by UID checks? See comments in forbid_setid also.
4312 /* This is used very early in the lifetime of the program,
4313 * before even the options are parsed, so PL_tainting has
4314 * not been initialized properly. */
4316 Perl_doing_taint(int argc, char *argv[], char *envp[])
4318 #ifndef PERL_IMPLICIT_SYS
4319 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4320 * before we have an interpreter-- and the whole point of this
4321 * function is to be called at such an early stage. If you are on
4322 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4323 * "tainted because running with altered effective ids', you'll
4324 * have to add your own checks somewhere in here. The two most
4325 * known samples of 'implicitness' are Win32 and NetWare, neither
4326 * of which has much of concept of 'uids'. */
4327 int uid = PerlProc_getuid();
4328 int euid = PerlProc_geteuid();
4329 int gid = PerlProc_getgid();
4330 int egid = PerlProc_getegid();
4337 if (uid && (euid != uid || egid != gid))
4339 #endif /* !PERL_IMPLICIT_SYS */
4340 /* This is a really primitive check; environment gets ignored only
4341 * if -T are the first chars together; otherwise one gets
4342 * "Too late" message. */
4343 if ( argc > 1 && argv[1][0] == '-'
4344 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4349 /* Passing the flag as a single char rather than a string is a slight space
4350 optimisation. The only message that isn't /^-.$/ is
4351 "program input from stdin", which is substituted in place of '\0', which
4352 could never be a command line flag. */
4354 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4357 char string[3] = "-x";
4358 const char *message = "program input from stdin";
4365 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4366 if (PL_euid != PL_uid)
4367 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4368 if (PL_egid != PL_gid)
4369 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4370 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4372 * Checks for UID/GID above "wrong": why disallow
4373 * perl -e 'print "Hello\n"'
4374 * from within setuid things?? Simply drop them: replaced by
4375 * fdscript/suidscript and #ifdef IAMSUID checks below.
4377 * This may be too late for command-line switches. Will catch those on
4378 * the #! line, after finding the script name and setting up
4379 * fdscript/suidscript. Note that suidperl does not get around to
4380 * parsing (and checking) the switches on the #! line, but checks that
4381 * the two sets are identical.
4383 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4384 * instead, or would that be "too late"? (We never have suidscript, can
4385 * we be sure to have fdscript?)
4387 * Catch things with suidscript (in descendant of suidperl), even with
4388 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4389 * below; but I am paranoid.
4391 * Also see comments about root running a setuid script, elsewhere.
4393 if (suidscript >= 0)
4394 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4396 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4397 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4398 #endif /* IAMSUID */
4402 Perl_init_debugger(pTHX)
4405 HV * const ostash = PL_curstash;
4407 PL_curstash = PL_debstash;
4408 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4410 AvREAL_off(PL_dbargs);
4411 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4412 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4413 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4414 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4415 sv_setiv(PL_DBsingle, 0);
4416 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4417 sv_setiv(PL_DBtrace, 0);
4418 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4419 sv_setiv(PL_DBsignal, 0);
4420 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4421 sv_setiv(PL_DBassertion, 0);
4422 PL_curstash = ostash;
4425 #ifndef STRESS_REALLOC
4426 #define REASONABLE(size) (size)
4428 #define REASONABLE(size) (1) /* unreasonable */
4432 Perl_init_stacks(pTHX)
4435 /* start with 128-item stack and 8K cxstack */
4436 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4437 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4438 PL_curstackinfo->si_type = PERLSI_MAIN;
4439 PL_curstack = PL_curstackinfo->si_stack;
4440 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4442 PL_stack_base = AvARRAY(PL_curstack);
4443 PL_stack_sp = PL_stack_base;
4444 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4446 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4449 PL_tmps_max = REASONABLE(128);
4451 Newx(PL_markstack,REASONABLE(32),I32);
4452 PL_markstack_ptr = PL_markstack;
4453 PL_markstack_max = PL_markstack + REASONABLE(32);
4457 Newx(PL_scopestack,REASONABLE(32),I32);
4458 PL_scopestack_ix = 0;
4459 PL_scopestack_max = REASONABLE(32);
4461 Newx(PL_savestack,REASONABLE(128),ANY);
4462 PL_savestack_ix = 0;
4463 PL_savestack_max = REASONABLE(128);
4472 while (PL_curstackinfo->si_next)
4473 PL_curstackinfo = PL_curstackinfo->si_next;
4474 while (PL_curstackinfo) {
4475 PERL_SI *p = PL_curstackinfo->si_prev;
4476 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4477 Safefree(PL_curstackinfo->si_cxstack);
4478 Safefree(PL_curstackinfo);
4479 PL_curstackinfo = p;
4481 Safefree(PL_tmps_stack);
4482 Safefree(PL_markstack);
4483 Safefree(PL_scopestack);
4484 Safefree(PL_savestack);
4494 lex_start(PL_linestr);
4496 PL_subname = newSVpvs("main");
4500 S_init_predump_symbols(pTHX)
4506 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4507 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4508 GvMULTI_on(PL_stdingv);
4509 io = GvIOp(PL_stdingv);
4510 IoTYPE(io) = IoTYPE_RDONLY;
4511 IoIFP(io) = PerlIO_stdin();
4512 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4514 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4516 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4519 IoTYPE(io) = IoTYPE_WRONLY;
4520 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4522 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4524 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4526 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4527 GvMULTI_on(PL_stderrgv);
4528 io = GvIOp(PL_stderrgv);
4529 IoTYPE(io) = IoTYPE_WRONLY;
4530 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4531 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4533 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4535 PL_statname = newSV(0); /* last filename we did stat on */
4537 Safefree(PL_osname);
4538 PL_osname = savepv(OSNAME);
4542 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4545 argc--,argv++; /* skip name of script */
4546 if (PL_doswitches) {
4547 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4551 if (argv[0][1] == '-' && !argv[0][2]) {
4555 if ((s = strchr(argv[0], '='))) {
4556 const char *const start_name = argv[0] + 1;
4557 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4558 TRUE, SVt_PV)), s + 1);
4561 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4564 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4565 GvMULTI_on(PL_argvgv);
4566 (void)gv_AVadd(PL_argvgv);
4567 av_clear(GvAVn(PL_argvgv));
4568 for (; argc > 0; argc--,argv++) {
4569 SV * const sv = newSVpv(argv[0],0);
4570 av_push(GvAVn(PL_argvgv),sv);
4571 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4572 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4575 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4576 (void)sv_utf8_decode(sv);
4582 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4587 PL_toptarget = newSV(0);
4588 sv_upgrade(PL_toptarget, SVt_PVFM);
4589 sv_setpvn(PL_toptarget, "", 0);
4590 PL_bodytarget = newSV(0);
4591 sv_upgrade(PL_bodytarget, SVt_PVFM);
4592 sv_setpvn(PL_bodytarget, "", 0);
4593 PL_formtarget = PL_bodytarget;
4597 init_argv_symbols(argc,argv);
4599 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4600 #ifdef MACOS_TRADITIONAL
4601 /* $0 is not majick on a Mac */
4602 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4604 sv_setpv(GvSV(tmpgv),PL_origfilename);
4605 magicname("0", "0", 1);
4608 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4610 GvMULTI_on(PL_envgv);
4611 hv = GvHVn(PL_envgv);
4612 hv_magic(hv, NULL, PERL_MAGIC_env);
4614 #ifdef USE_ENVIRON_ARRAY
4615 /* Note that if the supplied env parameter is actually a copy
4616 of the global environ then it may now point to free'd memory
4617 if the environment has been modified since. To avoid this
4618 problem we treat env==NULL as meaning 'use the default'
4623 # ifdef USE_ITHREADS
4624 && PL_curinterp == aTHX
4631 char** origenv = environ;
4634 for (; *env; env++) {
4635 if (!(s = strchr(*env,'=')) || s == *env)
4637 #if defined(MSDOS) && !defined(DJGPP)
4642 sv = newSVpv(s+1, 0);
4643 (void)hv_store(hv, *env, s - *env, sv, 0);
4646 if (origenv != environ) {
4647 /* realloc has shifted us */
4648 env = (env - origenv) + environ;
4653 #endif /* USE_ENVIRON_ARRAY */
4654 #endif /* !PERL_MICRO */
4657 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4658 SvREADONLY_off(GvSV(tmpgv));
4659 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4660 SvREADONLY_on(GvSV(tmpgv));
4662 #ifdef THREADS_HAVE_PIDS
4663 PL_ppid = (IV)getppid();
4666 /* touch @F array to prevent spurious warnings 20020415 MJD */
4668 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4670 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4671 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4672 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4676 S_init_perllib(pTHX)
4682 s = PerlEnv_getenv("PERL5LIB");
4684 * It isn't possible to delete an environment variable with
4685 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4686 * case we treat PERL5LIB as undefined if it has a zero-length value.
4688 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4689 if (s && *s != '\0')
4693 incpush(s, TRUE, TRUE, TRUE, FALSE);
4695 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4697 /* Treat PERL5?LIB as a possible search list logical name -- the
4698 * "natural" VMS idiom for a Unix path string. We allow each
4699 * element to be a set of |-separated directories for compatibility.
4703 if (my_trnlnm("PERL5LIB",buf,0))
4704 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4706 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4710 /* Use the ~-expanded versions of APPLLIB (undocumented),
4711 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4714 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4718 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4720 #ifdef MACOS_TRADITIONAL
4723 SV * privdir = newSV(0);
4724 char * macperl = PerlEnv_getenv("MACPERL");
4729 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4730 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4731 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4732 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4733 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4734 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4736 SvREFCNT_dec(privdir);
4739 incpush(":", FALSE, FALSE, TRUE, FALSE);
4742 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4745 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4747 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4751 /* sitearch is always relative to sitelib on Windows for
4752 * DLL-based path intuition to work correctly */
4753 # if !defined(WIN32)
4754 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4760 /* this picks up sitearch as well */
4761 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4763 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4767 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4768 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4771 #ifdef PERL_VENDORARCH_EXP
4772 /* vendorarch is always relative to vendorlib on Windows for
4773 * DLL-based path intuition to work correctly */
4774 # if !defined(WIN32)
4775 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4779 #ifdef PERL_VENDORLIB_EXP
4781 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4783 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4787 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4788 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4791 #ifdef PERL_OTHERLIBDIRS
4792 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4796 incpush(".", FALSE, FALSE, TRUE, FALSE);
4797 #endif /* MACOS_TRADITIONAL */
4800 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4801 # define PERLLIB_SEP ';'
4804 # define PERLLIB_SEP '|'
4806 # if defined(MACOS_TRADITIONAL)
4807 # define PERLLIB_SEP ','
4809 # define PERLLIB_SEP ':'
4813 #ifndef PERLLIB_MANGLE
4814 # define PERLLIB_MANGLE(s,n) (s)
4817 /* Push a directory onto @INC if it exists.
4818 Generate a new SV if we do this, to save needing to copy the SV we push
4821 S_incpush_if_exists(pTHX_ SV *dir)
4825 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4826 S_ISDIR(tmpstatbuf.st_mode)) {
4827 av_push(GvAVn(PL_incgv), dir);
4834 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4839 const char *p = dir;
4844 if (addsubdirs || addoldvers) {
4848 /* Break at all separators */
4850 SV *libdir = newSV(0);
4853 /* skip any consecutive separators */
4855 while ( *p == PERLLIB_SEP ) {
4856 /* Uncomment the next line for PATH semantics */
4857 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4862 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4863 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4868 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4869 p = NULL; /* break out */
4871 #ifdef MACOS_TRADITIONAL
4872 if (!strchr(SvPVX(libdir), ':')) {
4875 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4877 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4878 sv_catpvs(libdir, ":");
4881 /* Do the if() outside the #ifdef to avoid warnings about an unused
4884 #ifdef PERL_RELOCATABLE_INC
4886 * Relocatable include entries are marked with a leading .../
4889 * 0: Remove that leading ".../"
4890 * 1: Remove trailing executable name (anything after the last '/')
4891 * from the perl path to give a perl prefix
4893 * While the @INC element starts "../" and the prefix ends with a real
4894 * directory (ie not . or ..) chop that real directory off the prefix
4895 * and the leading "../" from the @INC element. ie a logical "../"
4897 * Finally concatenate the prefix and the remainder of the @INC element
4898 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4899 * generates /usr/local/lib/perl5
4901 const char *libpath = SvPVX(libdir);
4902 STRLEN libpath_len = SvCUR(libdir);
4903 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4905 SV * const caret_X = get_sv("\030", 0);
4906 /* Going to use the SV just as a scratch buffer holding a C
4912 /* $^X is *the* source of taint if tainting is on, hence
4913 SvPOK() won't be true. */
4915 assert(SvPOKp(caret_X));
4916 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4917 /* Firstly take off the leading .../
4918 If all else fail we'll do the paths relative to the current
4920 sv_chop(libdir, libpath + 4);
4921 /* Don't use SvPV as we're intentionally bypassing taining,
4922 mortal copies that the mg_get of tainting creates, and
4923 corruption that seems to come via the save stack.
4924 I guess that the save stack isn't correctly set up yet. */
4925 libpath = SvPVX(libdir);
4926 libpath_len = SvCUR(libdir);
4928 /* This would work more efficiently with memrchr, but as it's
4929 only a GNU extension we'd need to probe for it and
4930 implement our own. Not hard, but maybe not worth it? */
4932 prefix = SvPVX(prefix_sv);
4933 lastslash = strrchr(prefix, '/');
4935 /* First time in with the *lastslash = '\0' we just wipe off
4936 the trailing /perl from (say) /usr/foo/bin/perl
4940 while ((*lastslash = '\0'), /* Do that, come what may. */
4941 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4942 && (lastslash = strrchr(prefix, '/')))) {
4943 if (lastslash[1] == '\0'
4944 || (lastslash[1] == '.'
4945 && (lastslash[2] == '/' /* ends "/." */
4946 || (lastslash[2] == '/'
4947 && lastslash[3] == '/' /* or "/.." */
4949 /* Prefix ends "/" or "/." or "/..", any of which
4950 are fishy, so don't do any more logical cleanup.
4954 /* Remove leading "../" from path */
4957 /* Next iteration round the loop removes the last
4958 directory name from prefix by writing a '\0' in
4959 the while clause. */
4961 /* prefix has been terminated with a '\0' to the correct
4962 length. libpath points somewhere into the libdir SV.
4963 We need to join the 2 with '/' and drop the result into
4965 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4966 SvREFCNT_dec(libdir);
4967 /* And this is the new libdir. */
4970 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4971 /* Need to taint reloccated paths if running set ID */
4972 SvTAINTED_on(libdir);
4975 SvREFCNT_dec(prefix_sv);
4980 * BEFORE pushing libdir onto @INC we may first push version- and
4981 * archname-specific sub-directories.
4983 if (addsubdirs || addoldvers) {
4984 #ifdef PERL_INC_VERSION_LIST
4985 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4986 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4987 const char * const *incver;
4993 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4995 while (unix[len-1] == '/') len--; /* Cosmetic */
4996 sv_usepvn(libdir,unix,len);
4999 PerlIO_printf(Perl_error_log,
5000 "Failed to unixify @INC element \"%s\"\n",
5004 #ifdef MACOS_TRADITIONAL
5005 #define PERL_AV_SUFFIX_FMT ""
5006 #define PERL_ARCH_FMT "%s:"
5007 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5009 #define PERL_AV_SUFFIX_FMT "/"
5010 #define PERL_ARCH_FMT "/%s"
5011 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5013 /* .../version/archname if -d .../version/archname */
5014 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5016 (int)PERL_REVISION, (int)PERL_VERSION,
5017 (int)PERL_SUBVERSION, ARCHNAME);
5018 subdir = S_incpush_if_exists(aTHX_ subdir);
5020 /* .../version if -d .../version */
5021 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5022 (int)PERL_REVISION, (int)PERL_VERSION,
5023 (int)PERL_SUBVERSION);
5024 subdir = S_incpush_if_exists(aTHX_ subdir);
5026 /* .../archname if -d .../archname */
5027 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5028 subdir = S_incpush_if_exists(aTHX_ subdir);
5032 #ifdef PERL_INC_VERSION_LIST
5034 for (incver = incverlist; *incver; incver++) {
5035 /* .../xxx if -d .../xxx */
5036 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5037 subdir = S_incpush_if_exists(aTHX_ subdir);
5043 /* finally push this lib directory on the end of @INC */
5044 av_push(GvAVn(PL_incgv), libdir);
5047 assert (SvREFCNT(subdir) == 1);
5048 SvREFCNT_dec(subdir);
5054 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5058 const line_t oldline = CopLINE(PL_curcop);
5064 while (av_len(paramList) >= 0) {
5065 cv = (CV*)av_shift(paramList);
5067 if (paramList == PL_beginav) {
5068 /* save PL_beginav for compiler */
5069 if (! PL_beginav_save)
5070 PL_beginav_save = newAV();
5071 av_push(PL_beginav_save, (SV*)cv);
5073 else if (paramList == PL_checkav) {
5074 /* save PL_checkav for compiler */
5075 if (! PL_checkav_save)
5076 PL_checkav_save = newAV();
5077 av_push(PL_checkav_save, (SV*)cv);
5087 (void)SvPV_const(atsv, len);
5089 PL_curcop = &PL_compiling;
5090 CopLINE_set(PL_curcop, oldline);
5091 if (paramList == PL_beginav)
5092 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5094 Perl_sv_catpvf(aTHX_ atsv,
5095 "%s failed--call queue aborted",
5096 paramList == PL_checkav ? "CHECK"
5097 : paramList == PL_initav ? "INIT"
5099 while (PL_scopestack_ix > oldscope)
5102 Perl_croak(aTHX_ "%"SVf"", atsv);
5109 /* my_exit() was called */
5110 while (PL_scopestack_ix > oldscope)
5113 PL_curstash = PL_defstash;
5114 PL_curcop = &PL_compiling;
5115 CopLINE_set(PL_curcop, oldline);
5117 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5118 if (paramList == PL_beginav)
5119 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5121 Perl_croak(aTHX_ "%s failed--call queue aborted",
5122 paramList == PL_checkav ? "CHECK"
5123 : paramList == PL_initav ? "INIT"
5130 PL_curcop = &PL_compiling;
5131 CopLINE_set(PL_curcop, oldline);
5134 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5143 S_call_list_body(pTHX_ CV *cv)
5146 PUSHMARK(PL_stack_sp);
5147 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5152 Perl_my_exit(pTHX_ U32 status)
5155 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5156 thr, (unsigned long) status));
5165 STATUS_EXIT_SET(status);
5172 Perl_my_failure_exit(pTHX)
5176 /* We have been called to fall on our sword. The desired exit code
5177 * should be already set in STATUS_UNIX, but could be shifted over
5178 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5181 * If an error code has not been set, then force the issue.
5183 if (MY_POSIX_EXIT) {
5185 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5186 * the exit code when there isn't an error.
5189 if (STATUS_UNIX == 0)
5190 STATUS_UNIX_EXIT_SET(255);
5192 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5194 /* The exit code could have been set by $? or vmsish which
5195 * means that it may not be fatal. So convert
5196 * success/warning codes to fatal.
5198 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5199 STATUS_UNIX_EXIT_SET(255);
5203 /* Traditionally Perl on VMS always expects a Fatal Error. */
5204 if (vaxc$errno & 1) {
5206 /* So force success status to failure */
5207 if (STATUS_NATIVE & 1)
5212 STATUS_UNIX = EINTR; /* In case something cares */
5217 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5219 /* Encode the severity code */
5220 severity = STATUS_NATIVE & STS$M_SEVERITY;
5221 STATUS_UNIX = (severity ? severity : 1) << 8;
5223 /* Perl expects this to be a fatal error */
5224 if (severity != STS$K_SEVERE)
5233 STATUS_UNIX_SET(errno);
5235 exitstatus = STATUS_UNIX >> 8;
5236 if (exitstatus & 255)
5237 STATUS_UNIX_SET(exitstatus);
5239 STATUS_UNIX_SET(255);
5246 S_my_exit_jump(pTHX)
5249 register PERL_CONTEXT *cx;
5254 SvREFCNT_dec(PL_e_script);
5258 POPSTACK_TO(PL_mainstack);
5259 if (cxstack_ix >= 0) {
5262 POPBLOCK(cx,PL_curpm);
5267 PERL_UNUSED_VAR(gimme);
5268 PERL_UNUSED_VAR(newsp);
5272 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5275 const char * const p = SvPVX_const(PL_e_script);
5276 const char *nl = strchr(p, '\n');
5278 PERL_UNUSED_ARG(idx);
5279 PERL_UNUSED_ARG(maxlen);
5281 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5283 filter_del(read_e_script);
5286 sv_catpvn(buf_sv, p, nl-p);
5287 sv_chop(PL_e_script, nl);
5293 * c-indentation-style: bsd
5295 * indent-tabs-mode: t
5298 * ex: set ts=8 sts=4 sw=4 noet: