3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
185 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
188 Perl_sys_init(int* argc, char*** argv)
191 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
192 PERL_UNUSED_ARG(argv);
193 PERL_SYS_INIT_BODY(argc, argv);
197 Perl_sys_init3(int* argc, char*** argv, char*** env)
200 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
201 PERL_UNUSED_ARG(argv);
202 PERL_UNUSED_ARG(env);
203 PERL_SYS_INIT3_BODY(argc, argv, env);
210 if (!PL_veto_cleanup) {
211 PERL_SYS_TERM_BODY();
216 #ifdef PERL_IMPLICIT_SYS
218 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
219 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
220 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
221 struct IPerlDir* ipD, struct IPerlSock* ipS,
222 struct IPerlProc* ipP)
224 PerlInterpreter *my_perl;
225 /* Newx() needs interpreter, so call malloc() instead */
226 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
227 S_init_tls_and_interp(my_perl);
228 Zero(my_perl, 1, PerlInterpreter);
238 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
245 =head1 Embedding Functions
247 =for apidoc perl_alloc
249 Allocates a new Perl interpreter. See L<perlembed>.
257 PerlInterpreter *my_perl;
259 /* Newx() needs interpreter, so call malloc() instead */
260 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
262 S_init_tls_and_interp(my_perl);
263 #ifndef PERL_TRACK_MEMPOOL
264 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
266 Zero(my_perl, 1, PerlInterpreter);
267 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
271 #endif /* PERL_IMPLICIT_SYS */
274 =for apidoc perl_construct
276 Initializes a new Perl interpreter. See L<perlembed>.
282 perl_construct(pTHXx)
285 PERL_UNUSED_ARG(my_perl);
288 PL_perl_destruct_level = 1;
290 if (PL_perl_destruct_level > 0)
293 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
295 /* set read-only and try to insure than we wont see REFCNT==0
298 SvREADONLY_on(&PL_sv_undef);
299 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
301 sv_setpv(&PL_sv_no,PL_No);
302 /* value lookup in void context - happens to have the side effect
303 of caching the numeric forms. However, as &PL_sv_no doesn't contain
304 a string that is a valid numer, we have to turn the public flags by
310 SvREADONLY_on(&PL_sv_no);
311 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
313 sv_setpv(&PL_sv_yes,PL_Yes);
316 SvREADONLY_on(&PL_sv_yes);
317 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
319 SvREADONLY_on(&PL_sv_placeholder);
320 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
322 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
323 #ifdef PERL_USES_PL_PIDSTATUS
324 PL_pidstatus = newHV();
327 PL_rs = newSVpvs("\n");
337 SET_NUMERIC_STANDARD();
339 #if defined(LOCAL_PATCH_COUNT)
340 PL_localpatches = local_patches; /* For possible -v */
343 #ifdef HAVE_INTERP_INTERN
347 PerlIO_init(aTHX); /* Hook to IO system */
349 PL_fdpid = newAV(); /* for remembering popen pids by fd */
350 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
351 PL_errors = newSVpvs("");
352 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
353 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
354 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
356 /* First entry is an array of empty elements */
357 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
358 PL_regex_pad = AvARRAY(PL_regex_padav);
360 #ifdef USE_REENTRANT_API
361 Perl_reentrant_init(aTHX);
364 /* Note that strtab is a rather special HV. Assumptions are made
365 about not iterating on it, and not adding tie magic to it.
366 It is properly deallocated in perl_destruct() */
369 HvSHAREKEYS_off(PL_strtab); /* mandatory */
370 hv_ksplit(PL_strtab, 512);
372 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
373 _dyld_lookup_and_bind
374 ("__environ", (unsigned long *) &environ_pointer, NULL);
378 # ifdef USE_ENVIRON_ARRAY
379 PL_origenviron = environ;
383 /* Use sysconf(_SC_CLK_TCK) if available, if not
384 * available or if the sysconf() fails, use the HZ.
385 * BeOS has those, but returns the wrong value.
386 * The HZ if not originally defined has been by now
387 * been defined as CLK_TCK, if available. */
388 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
389 PL_clocktick = sysconf(_SC_CLK_TCK);
390 if (PL_clocktick <= 0)
394 PL_stashcache = newHV();
396 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
397 (int)PERL_VERSION, (int)PERL_SUBVERSION);
400 if (!PL_mmap_page_size) {
401 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
403 SETERRNO(0, SS_NORMAL);
405 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
407 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
409 if ((long) PL_mmap_page_size < 0) {
411 SV * const error = ERRSV;
412 SvUPGRADE(error, SVt_PV);
413 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
416 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
420 # ifdef HAS_GETPAGESIZE
421 PL_mmap_page_size = getpagesize();
423 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
424 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
428 if (PL_mmap_page_size <= 0)
429 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
430 (IV) PL_mmap_page_size);
432 #endif /* HAS_MMAP */
434 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
435 PL_timesbase.tms_utime = 0;
436 PL_timesbase.tms_stime = 0;
437 PL_timesbase.tms_cutime = 0;
438 PL_timesbase.tms_cstime = 0;
445 =for apidoc nothreadhook
447 Stub that provides thread hook for perl_destruct when there are
454 Perl_nothreadhook(pTHX)
460 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
462 Perl_dump_sv_child(pTHX_ SV *sv)
465 const int sock = PL_dumper_fd;
466 const int debug_fd = PerlIO_fileno(Perl_debug_log);
467 union control_un control;
470 struct cmsghdr *cmptr;
472 unsigned char buffer[256];
474 if(sock == -1 || debug_fd == -1)
477 PerlIO_flush(Perl_debug_log);
479 /* All these shenanigans are to pass a file descriptor over to our child for
480 it to dump out to. We can't let it hold open the file descriptor when it
481 forks, as the file descriptor it will dump to can turn out to be one end
482 of pipe that some other process will wait on for EOF. (So as it would
483 be open, the wait would be forever.) */
485 msg.msg_control = control.control;
486 msg.msg_controllen = sizeof(control.control);
487 /* We're a connected socket so we don't need a destination */
493 cmptr = CMSG_FIRSTHDR(&msg);
494 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
495 cmptr->cmsg_level = SOL_SOCKET;
496 cmptr->cmsg_type = SCM_RIGHTS;
497 *((int *)CMSG_DATA(cmptr)) = 1;
499 vec[0].iov_base = (void*)&sv;
500 vec[0].iov_len = sizeof(sv);
501 got = sendmsg(sock, &msg, 0);
504 perror("Debug leaking scalars parent sendmsg failed");
507 if(got < sizeof(sv)) {
508 perror("Debug leaking scalars parent short sendmsg");
512 /* Return protocol is
514 unsigned char: length of location string (0 for empty)
515 unsigned char*: string (not terminated)
517 vec[0].iov_base = (void*)&returned_errno;
518 vec[0].iov_len = sizeof(returned_errno);
519 vec[1].iov_base = buffer;
522 got = readv(sock, vec, 2);
525 perror("Debug leaking scalars parent read failed");
526 PerlIO_flush(PerlIO_stderr());
529 if(got < sizeof(returned_errno) + 1) {
530 perror("Debug leaking scalars parent short read");
531 PerlIO_flush(PerlIO_stderr());
536 got = read(sock, buffer + 1, *buffer);
538 perror("Debug leaking scalars parent read 2 failed");
539 PerlIO_flush(PerlIO_stderr());
544 perror("Debug leaking scalars parent short read 2");
545 PerlIO_flush(PerlIO_stderr());
550 if (returned_errno || *buffer) {
551 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
552 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
553 returned_errno, strerror(returned_errno));
559 =for apidoc perl_destruct
561 Shuts down a Perl interpreter. See L<perlembed>.
570 VOL signed char destruct_level; /* see possible values in intrpvar.h */
572 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
576 PERL_UNUSED_ARG(my_perl);
578 /* wait for all pseudo-forked children to finish */
579 PERL_WAIT_FOR_CHILDREN;
581 destruct_level = PL_perl_destruct_level;
584 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
586 const int i = atoi(s);
587 if (destruct_level < i)
593 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
599 if (PL_endav && !PL_minus_c)
600 call_list(PL_scopestack_ix, PL_endav);
606 /* Need to flush since END blocks can produce output */
609 if (CALL_FPTR(PL_threadhook)(aTHX)) {
610 /* Threads hook has vetoed further cleanup */
611 PL_veto_cleanup = TRUE;
615 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
616 if (destruct_level != 0) {
617 /* Fork here to create a child. Our child's job is to preserve the
618 state of scalars prior to destruction, so that we can instruct it
619 to dump any scalars that we later find have leaked.
620 There's no subtlety in this code - it assumes POSIX, and it doesn't
624 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
625 perror("Debug leaking scalars socketpair failed");
631 perror("Debug leaking scalars fork failed");
635 /* We are the child */
636 const int sock = fd[1];
637 const int debug_fd = PerlIO_fileno(Perl_debug_log);
640 /* Our success message is an integer 0, and a char 0 */
641 static const char success[sizeof(int) + 1];
645 /* We need to close all other file descriptors otherwise we end up
646 with interesting hangs, where the parent closes its end of a
647 pipe, and sits waiting for (another) child to terminate. Only
648 that child never terminates, because it never gets EOF, because
649 we also have the far end of the pipe open. We even need to
650 close the debugging fd, because sometimes it happens to be one
651 end of a pipe, and a process is waiting on the other end for
652 EOF. Normally it would be closed at some point earlier in
653 destruction, but if we happen to cause the pipe to remain open,
654 EOF never occurs, and we get an infinite hang. Hence all the
655 games to pass in a file descriptor if it's actually needed. */
657 f = sysconf(_SC_OPEN_MAX);
659 where = "sysconf failed";
670 union control_un control;
673 struct cmsghdr *cmptr;
677 msg.msg_control = control.control;
678 msg.msg_controllen = sizeof(control.control);
679 /* We're a connected socket so we don't need a source */
683 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
685 vec[0].iov_base = (void*)⌖
686 vec[0].iov_len = sizeof(target);
688 got = recvmsg(sock, &msg, 0);
693 where = "recv failed";
696 if(got < sizeof(target)) {
697 where = "short recv";
701 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
705 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
706 where = "wrong cmsg_len";
709 if(cmptr->cmsg_level != SOL_SOCKET) {
710 where = "wrong cmsg_level";
713 if(cmptr->cmsg_type != SCM_RIGHTS) {
714 where = "wrong cmsg_type";
718 got_fd = *(int*)CMSG_DATA(cmptr);
719 /* For our last little bit of trickery, put the file descriptor
720 back into Perl_debug_log, as if we never actually closed it
722 if(got_fd != debug_fd) {
723 if (dup2(got_fd, debug_fd) == -1) {
730 PerlIO_flush(Perl_debug_log);
732 got = write(sock, &success, sizeof(success));
735 where = "write failed";
738 if(got < sizeof(success)) {
739 where = "short write";
746 int send_errno = errno;
747 unsigned char length = (unsigned char) strlen(where);
748 struct iovec failure[3] = {
749 {(void*)&send_errno, sizeof(send_errno)},
751 {(void*)where, length}
753 int got = writev(sock, failure, 3);
754 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
755 in the parent if we try to read from the socketpair after the
756 child has exited, even if there was data to read.
757 So sleep a bit to give the parent a fighting chance of
760 _exit((got == -1) ? errno : 0);
764 PL_dumper_fd = fd[0];
769 /* We must account for everything. */
771 /* Destroy the main CV and syntax tree */
772 /* Do this now, because destroying ops can cause new SVs to be generated
773 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
774 PL_curcop to point to a valid op from which the filename structure
776 PL_curcop = &PL_compiling;
778 /* ensure comppad/curpad to refer to main's pad */
779 if (CvPADLIST(PL_main_cv)) {
780 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
782 op_free(PL_main_root);
785 PL_main_start = NULL;
786 SvREFCNT_dec(PL_main_cv);
790 /* Tell PerlIO we are about to tear things apart in case
791 we have layers which are using resources that should
795 PerlIO_destruct(aTHX);
797 if (PL_sv_objcount) {
799 * Try to destruct global references. We do this first so that the
800 * destructors and destructees still exist. Some sv's might remain.
801 * Non-referenced objects are on their own.
805 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
806 PL_defoutgv = NULL; /* may have been freed */
809 /* unhook hooks which will soon be, or use, destroyed data */
810 SvREFCNT_dec(PL_warnhook);
812 SvREFCNT_dec(PL_diehook);
815 /* call exit list functions */
816 while (PL_exitlistlen-- > 0)
817 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
819 Safefree(PL_exitlist);
824 /* jettison our possibly duplicated environment */
825 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
826 * so we certainly shouldn't free it here
829 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
830 if (environ != PL_origenviron && !PL_use_safe_putenv
832 /* only main thread can free environ[0] contents */
833 && PL_curinterp == aTHX
839 for (i = 0; environ[i]; i++)
840 safesysfree(environ[i]);
842 /* Must use safesysfree() when working with environ. */
843 safesysfree(environ);
845 environ = PL_origenviron;
848 #endif /* !PERL_MICRO */
850 if (destruct_level == 0) {
852 DEBUG_P(debprofdump());
854 #if defined(PERLIO_LAYERS)
855 /* No more IO - including error messages ! */
856 PerlIO_cleanup(aTHX);
859 CopFILE_free(&PL_compiling);
860 CopSTASH_free(&PL_compiling);
862 /* The exit() function will do everything that needs doing. */
866 /* reset so print() ends up where we expect */
870 /* the syntax tree is shared between clones
871 * so op_free(PL_main_root) only ReREFCNT_dec's
872 * REGEXPs in the parent interpreter
873 * we need to manually ReREFCNT_dec for the clones
875 SvREFCNT_dec(PL_regex_padav);
876 PL_regex_padav = NULL;
880 SvREFCNT_dec((SV*) PL_stashcache);
881 PL_stashcache = NULL;
883 /* loosen bonds of global variables */
885 /* XXX can PL_parser still be non-null here? */
886 if(PL_parser && PL_parser->rsfp) {
887 (void)PerlIO_close(PL_parser->rsfp);
888 PL_parser->rsfp = NULL;
892 Safefree(PL_splitstr);
902 PL_doswitches = FALSE;
903 PL_dowarn = G_WARN_OFF;
904 PL_doextract = FALSE;
905 PL_sawampersand = FALSE; /* must save all match strings */
908 Safefree(PL_inplace);
910 SvREFCNT_dec(PL_patchlevel);
913 SvREFCNT_dec(PL_e_script);
919 /* magical thingies */
921 SvREFCNT_dec(PL_ofs_sv); /* $, */
924 SvREFCNT_dec(PL_ors_sv); /* $\ */
927 SvREFCNT_dec(PL_rs); /* $/ */
930 Safefree(PL_osname); /* $^O */
933 SvREFCNT_dec(PL_statname);
937 /* defgv, aka *_ should be taken care of elsewhere */
939 /* clean up after study() */
940 SvREFCNT_dec(PL_lastscream);
941 PL_lastscream = NULL;
942 Safefree(PL_screamfirst);
944 Safefree(PL_screamnext);
948 Safefree(PL_efloatbuf);
952 /* startup and shutdown function lists */
953 SvREFCNT_dec(PL_beginav);
954 SvREFCNT_dec(PL_beginav_save);
955 SvREFCNT_dec(PL_endav);
956 SvREFCNT_dec(PL_checkav);
957 SvREFCNT_dec(PL_checkav_save);
958 SvREFCNT_dec(PL_unitcheckav);
959 SvREFCNT_dec(PL_unitcheckav_save);
960 SvREFCNT_dec(PL_initav);
962 PL_beginav_save = NULL;
965 PL_checkav_save = NULL;
966 PL_unitcheckav = NULL;
967 PL_unitcheckav_save = NULL;
970 /* shortcuts just get cleared */
979 PL_last_in_gv = NULL;
991 SvREFCNT_dec(PL_argvout_stack);
992 PL_argvout_stack = NULL;
994 SvREFCNT_dec(PL_modglobal);
996 SvREFCNT_dec(PL_preambleav);
997 PL_preambleav = NULL;
998 SvREFCNT_dec(PL_subname);
1000 #ifdef PERL_USES_PL_PIDSTATUS
1001 SvREFCNT_dec(PL_pidstatus);
1002 PL_pidstatus = NULL;
1004 SvREFCNT_dec(PL_toptarget);
1005 PL_toptarget = NULL;
1006 SvREFCNT_dec(PL_bodytarget);
1007 PL_bodytarget = NULL;
1008 PL_formtarget = NULL;
1010 /* free locale stuff */
1011 #ifdef USE_LOCALE_COLLATE
1012 Safefree(PL_collation_name);
1013 PL_collation_name = NULL;
1016 #ifdef USE_LOCALE_NUMERIC
1017 Safefree(PL_numeric_name);
1018 PL_numeric_name = NULL;
1019 SvREFCNT_dec(PL_numeric_radix_sv);
1020 PL_numeric_radix_sv = NULL;
1023 /* clear utf8 character classes */
1024 SvREFCNT_dec(PL_utf8_alnum);
1025 SvREFCNT_dec(PL_utf8_alnumc);
1026 SvREFCNT_dec(PL_utf8_ascii);
1027 SvREFCNT_dec(PL_utf8_alpha);
1028 SvREFCNT_dec(PL_utf8_space);
1029 SvREFCNT_dec(PL_utf8_cntrl);
1030 SvREFCNT_dec(PL_utf8_graph);
1031 SvREFCNT_dec(PL_utf8_digit);
1032 SvREFCNT_dec(PL_utf8_upper);
1033 SvREFCNT_dec(PL_utf8_lower);
1034 SvREFCNT_dec(PL_utf8_print);
1035 SvREFCNT_dec(PL_utf8_punct);
1036 SvREFCNT_dec(PL_utf8_xdigit);
1037 SvREFCNT_dec(PL_utf8_mark);
1038 SvREFCNT_dec(PL_utf8_toupper);
1039 SvREFCNT_dec(PL_utf8_totitle);
1040 SvREFCNT_dec(PL_utf8_tolower);
1041 SvREFCNT_dec(PL_utf8_tofold);
1042 SvREFCNT_dec(PL_utf8_idstart);
1043 SvREFCNT_dec(PL_utf8_idcont);
1044 PL_utf8_alnum = NULL;
1045 PL_utf8_alnumc = NULL;
1046 PL_utf8_ascii = NULL;
1047 PL_utf8_alpha = NULL;
1048 PL_utf8_space = NULL;
1049 PL_utf8_cntrl = NULL;
1050 PL_utf8_graph = NULL;
1051 PL_utf8_digit = NULL;
1052 PL_utf8_upper = NULL;
1053 PL_utf8_lower = NULL;
1054 PL_utf8_print = NULL;
1055 PL_utf8_punct = NULL;
1056 PL_utf8_xdigit = NULL;
1057 PL_utf8_mark = NULL;
1058 PL_utf8_toupper = NULL;
1059 PL_utf8_totitle = NULL;
1060 PL_utf8_tolower = NULL;
1061 PL_utf8_tofold = NULL;
1062 PL_utf8_idstart = NULL;
1063 PL_utf8_idcont = NULL;
1065 if (!specialWARN(PL_compiling.cop_warnings))
1066 PerlMemShared_free(PL_compiling.cop_warnings);
1067 PL_compiling.cop_warnings = NULL;
1068 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1069 PL_compiling.cop_hints_hash = NULL;
1070 CopFILE_free(&PL_compiling);
1071 CopSTASH_free(&PL_compiling);
1073 /* Prepare to destruct main symbol table. */
1078 SvREFCNT_dec(PL_curstname);
1079 PL_curstname = NULL;
1081 /* clear queued errors */
1082 SvREFCNT_dec(PL_errors);
1085 SvREFCNT_dec(PL_isarev);
1088 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1089 if (PL_scopestack_ix != 0)
1090 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1091 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1092 (long)PL_scopestack_ix);
1093 if (PL_savestack_ix != 0)
1094 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1095 "Unbalanced saves: %ld more saves than restores\n",
1096 (long)PL_savestack_ix);
1097 if (PL_tmps_floor != -1)
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1099 (long)PL_tmps_floor + 1);
1100 if (cxstack_ix != -1)
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1102 (long)cxstack_ix + 1);
1105 /* Now absolutely destruct everything, somehow or other, loops or no. */
1106 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1107 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1109 /* the 2 is for PL_fdpid and PL_strtab */
1110 while (PL_sv_count > 2 && sv_clean_all())
1113 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1114 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1115 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1116 SvFLAGS(PL_strtab) |= SVt_PVHV;
1118 AvREAL_off(PL_fdpid); /* no surviving entries */
1119 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1122 #ifdef HAVE_INTERP_INTERN
1126 /* Destruct the global string table. */
1128 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1129 * so that sv_free() won't fail on them.
1130 * Now that the global string table is using a single hunk of memory
1131 * for both HE and HEK, we either need to explicitly unshare it the
1132 * correct way, or actually free things here.
1135 const I32 max = HvMAX(PL_strtab);
1136 HE * const * const array = HvARRAY(PL_strtab);
1137 HE *hent = array[0];
1140 if (hent && ckWARN_d(WARN_INTERNAL)) {
1141 HE * const next = HeNEXT(hent);
1142 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1143 "Unbalanced string table refcount: (%ld) for \"%s\"",
1144 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1151 hent = array[riter];
1156 HvARRAY(PL_strtab) = 0;
1157 HvTOTALKEYS(PL_strtab) = 0;
1158 HvFILL(PL_strtab) = 0;
1160 SvREFCNT_dec(PL_strtab);
1163 /* free the pointer tables used for cloning */
1164 ptr_table_free(PL_ptr_table);
1165 PL_ptr_table = (PTR_TBL_t*)NULL;
1168 /* free special SVs */
1170 SvREFCNT(&PL_sv_yes) = 0;
1171 sv_clear(&PL_sv_yes);
1172 SvANY(&PL_sv_yes) = NULL;
1173 SvFLAGS(&PL_sv_yes) = 0;
1175 SvREFCNT(&PL_sv_no) = 0;
1176 sv_clear(&PL_sv_no);
1177 SvANY(&PL_sv_no) = NULL;
1178 SvFLAGS(&PL_sv_no) = 0;
1182 for (i=0; i<=2; i++) {
1183 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1184 sv_clear(PERL_DEBUG_PAD(i));
1185 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1186 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1190 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1191 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1193 #ifdef DEBUG_LEAKING_SCALARS
1194 if (PL_sv_count != 0) {
1199 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1200 svend = &sva[SvREFCNT(sva)];
1201 for (sv = sva + 1; sv < svend; ++sv) {
1202 if (SvTYPE(sv) != SVTYPEMASK) {
1203 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1205 " refcnt=%"UVuf pTHX__FORMAT "\n"
1206 "\tallocated at %s:%d %s %s%s\n",
1207 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1209 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1211 sv->sv_debug_inpad ? "for" : "by",
1212 sv->sv_debug_optype ?
1213 PL_op_name[sv->sv_debug_optype]: "(none)",
1214 sv->sv_debug_cloned ? " (cloned)" : ""
1216 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1217 Perl_dump_sv_child(aTHX_ sv);
1223 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1227 /* Wait for up to 4 seconds for child to terminate.
1228 This seems to be the least effort way of timing out on reaping
1230 struct timeval waitfor = {4, 0};
1231 int sock = PL_dumper_fd;
1235 FD_SET(sock, &rset);
1236 select(sock + 1, &rset, NULL, NULL, &waitfor);
1237 waitpid(child, &status, WNOHANG);
1242 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1248 #ifdef PERL_DEBUG_READONLY_OPS
1254 #if defined(PERLIO_LAYERS)
1255 /* No more IO - including error messages ! */
1256 PerlIO_cleanup(aTHX);
1259 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1260 as currently layers use it rather than NULL as a marker
1261 for no arg - and will try and SvREFCNT_dec it.
1263 SvREFCNT(&PL_sv_undef) = 0;
1264 SvREADONLY_off(&PL_sv_undef);
1266 Safefree(PL_origfilename);
1267 PL_origfilename = NULL;
1268 Safefree(PL_reg_start_tmp);
1269 PL_reg_start_tmp = (char**)NULL;
1270 PL_reg_start_tmpl = 0;
1271 Safefree(PL_reg_curpm);
1272 Safefree(PL_reg_poscache);
1273 free_tied_hv_pool();
1274 Safefree(PL_op_mask);
1275 Safefree(PL_psig_ptr);
1276 PL_psig_ptr = (SV**)NULL;
1277 Safefree(PL_psig_name);
1278 PL_psig_name = (SV**)NULL;
1279 Safefree(PL_bitcount);
1281 Safefree(PL_psig_pend);
1282 PL_psig_pend = (int*)NULL;
1285 PL_tainting = FALSE;
1286 PL_taint_warn = FALSE;
1287 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1290 DEBUG_P(debprofdump());
1292 #ifdef USE_REENTRANT_API
1293 Perl_reentrant_free(aTHX);
1298 while (PL_regmatch_slab) {
1299 regmatch_slab *s = PL_regmatch_slab;
1300 PL_regmatch_slab = PL_regmatch_slab->next;
1304 /* As the absolutely last thing, free the non-arena SV for mess() */
1307 /* we know that type == SVt_PVMG */
1309 /* it could have accumulated taint magic */
1312 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1313 moremagic = mg->mg_moremagic;
1314 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1316 Safefree(mg->mg_ptr);
1320 /* we know that type >= SVt_PV */
1321 SvPV_free(PL_mess_sv);
1322 Safefree(SvANY(PL_mess_sv));
1323 Safefree(PL_mess_sv);
1330 =for apidoc perl_free
1332 Releases a Perl interpreter. See L<perlembed>.
1342 if (PL_veto_cleanup)
1345 #ifdef PERL_TRACK_MEMPOOL
1348 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1349 * value as we're probably hunting memory leaks then
1351 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1352 if (!s || atoi(s) == 0) {
1353 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1354 thread at thread exit. */
1355 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1356 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1361 #if defined(WIN32) || defined(NETWARE)
1362 # if defined(PERL_IMPLICIT_SYS)
1365 void *host = nw_internal_host;
1367 void *host = w32_internal_host;
1369 PerlMem_free(aTHXx);
1371 nw_delete_internal_host(host);
1373 win32_delete_internal_host(host);
1377 PerlMem_free(aTHXx);
1380 PerlMem_free(aTHXx);
1384 #if defined(USE_ITHREADS)
1385 /* provide destructors to clean up the thread key when libperl is unloaded */
1386 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1388 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1389 #pragma fini "perl_fini"
1390 #elif defined(__sun) && !defined(__GNUC__)
1391 #pragma fini (perl_fini)
1395 #if defined(__GNUC__)
1396 __attribute__((destructor))
1401 if (PL_curinterp && !PL_veto_cleanup)
1406 #endif /* THREADS */
1409 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1412 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1413 PL_exitlist[PL_exitlistlen].fn = fn;
1414 PL_exitlist[PL_exitlistlen].ptr = ptr;
1418 #ifdef HAS_PROCSELFEXE
1419 /* This is a function so that we don't hold on to MAXPATHLEN
1420 bytes of stack longer than necessary
1423 S_procself_val(pTHX_ SV *sv, const char *arg0)
1425 char buf[MAXPATHLEN];
1426 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1428 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1429 includes a spurious NUL which will cause $^X to fail in system
1430 or backticks (this will prevent extensions from being built and
1431 many tests from working). readlink is not meant to add a NUL.
1432 Normal readlink works fine.
1434 if (len > 0 && buf[len-1] == '\0') {
1438 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1439 returning the text "unknown" from the readlink rather than the path
1440 to the executable (or returning an error from the readlink). Any valid
1441 path has a '/' in it somewhere, so use that to validate the result.
1442 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1444 if (len > 0 && memchr(buf, '/', len)) {
1445 sv_setpvn(sv,buf,len);
1451 #endif /* HAS_PROCSELFEXE */
1454 S_set_caret_X(pTHX) {
1456 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1458 #ifdef HAS_PROCSELFEXE
1459 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1462 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1464 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1471 =for apidoc perl_parse
1473 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1479 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1486 PERL_UNUSED_ARG(my_perl);
1488 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1491 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1492 setuid perl scripts securely.\n");
1493 #endif /* IAMSUID */
1496 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1497 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1498 * This MUST be done before any hash stores or fetches take place.
1499 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1500 * yourself, it is your responsibility to provide a good random seed!
1501 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1502 if (!PL_rehash_seed_set)
1503 PL_rehash_seed = get_hash_seed();
1505 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1507 if (s && (atoi(s) == 1))
1508 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1510 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1515 if (PL_origalen != 0) {
1516 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1519 /* Set PL_origalen be the sum of the contiguous argv[]
1520 * elements plus the size of the env in case that it is
1521 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1522 * as the maximum modifiable length of $0. In the worst case
1523 * the area we are able to modify is limited to the size of
1524 * the original argv[0]. (See below for 'contiguous', though.)
1526 const char *s = NULL;
1529 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1530 /* Do the mask check only if the args seem like aligned. */
1532 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1534 /* See if all the arguments are contiguous in memory. Note
1535 * that 'contiguous' is a loose term because some platforms
1536 * align the argv[] and the envp[]. If the arguments look
1537 * like non-aligned, assume that they are 'strictly' or
1538 * 'traditionally' contiguous. If the arguments look like
1539 * aligned, we just check that they are within aligned
1540 * PTRSIZE bytes. As long as no system has something bizarre
1541 * like the argv[] interleaved with some other data, we are
1542 * fine. (Did I just evoke Murphy's Law?) --jhi */
1543 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1545 for (i = 1; i < PL_origargc; i++) {
1546 if ((PL_origargv[i] == s + 1
1548 || PL_origargv[i] == s + 2
1553 (PL_origargv[i] > s &&
1555 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1566 #ifndef PERL_USE_SAFE_PUTENV
1567 /* Can we grab env area too to be used as the area for $0? */
1568 if (s && PL_origenviron && !PL_use_safe_putenv) {
1569 if ((PL_origenviron[0] == s + 1)
1572 (PL_origenviron[0] > s &&
1573 PL_origenviron[0] <=
1574 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1578 s = PL_origenviron[0];
1581 my_setenv("NoNe SuCh", NULL);
1582 /* Force copy of environment. */
1583 for (i = 1; PL_origenviron[i]; i++) {
1584 if (PL_origenviron[i] == s + 1
1587 (PL_origenviron[i] > s &&
1588 PL_origenviron[i] <=
1589 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1592 s = PL_origenviron[i];
1600 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1602 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1607 /* Come here if running an undumped a.out. */
1609 PL_origfilename = savepv(argv[0]);
1610 PL_do_undump = FALSE;
1611 cxstack_ix = -1; /* start label stack again */
1613 assert (!PL_tainted);
1615 S_set_caret_X(aTHX);
1617 init_postdump_symbols(argc,argv,env);
1622 op_free(PL_main_root);
1623 PL_main_root = NULL;
1625 PL_main_start = NULL;
1626 SvREFCNT_dec(PL_main_cv);
1630 oldscope = PL_scopestack_ix;
1631 PL_dowarn = G_WARN_OFF;
1636 parse_body(env,xsinit);
1638 call_list(oldscope, PL_unitcheckav);
1640 call_list(oldscope, PL_checkav);
1647 /* my_exit() was called */
1648 while (PL_scopestack_ix > oldscope)
1651 PL_curstash = PL_defstash;
1653 call_list(oldscope, PL_unitcheckav);
1655 call_list(oldscope, PL_checkav);
1659 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1668 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1672 int argc = PL_origargc;
1673 char **argv = PL_origargv;
1674 const char *scriptname = NULL;
1675 VOL bool dosearch = FALSE;
1676 const char *validarg = "";
1679 const char *cddir = NULL;
1680 #ifdef USE_SITECUSTOMIZE
1681 bool minus_f = FALSE;
1683 SV *linestr_sv = newSV_type(SVt_PVIV);
1684 bool add_read_e_script = FALSE;
1686 SvGROW(linestr_sv, 80);
1687 sv_setpvn(linestr_sv,"",0);
1689 sv = newSVpvs(""); /* first used for -I flags */
1695 for (argc--,argv++; argc > 0; argc--,argv++) {
1696 if (argv[0][0] != '-' || !argv[0][1])
1700 validarg = " PHOOEY ";
1704 * Can we rely on the kernel to start scripts with argv[1] set to
1705 * contain all #! line switches (the whole line)? (argv[0] is set to
1706 * the interpreter name, argv[2] to the script name; argv[3] and
1707 * above may contain other arguments.)
1714 #ifndef PERL_STRICT_CR
1738 if ((s = moreswitches(s)))
1743 CHECK_MALLOC_TOO_LATE_FOR('t');
1744 if( !PL_tainting ) {
1745 PL_taint_warn = TRUE;
1751 CHECK_MALLOC_TOO_LATE_FOR('T');
1753 PL_taint_warn = FALSE;
1761 #ifdef MACOS_TRADITIONAL
1762 /* ignore -e for Dev:Pseudo argument */
1763 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1766 forbid_setid('e', -1);
1768 PL_e_script = newSVpvs("");
1769 add_read_e_script = TRUE;
1772 sv_catpv(PL_e_script, s);
1774 sv_catpv(PL_e_script, argv[1]);
1778 Perl_croak(aTHX_ "No code specified for -%c", c);
1779 sv_catpvs(PL_e_script, "\n");
1783 #ifdef USE_SITECUSTOMIZE
1789 case 'I': /* -I handled both here and in moreswitches() */
1790 forbid_setid('I', -1);
1791 if (!*++s && (s=argv[1]) != NULL) {
1795 STRLEN len = strlen(s);
1796 const char * const p = savepvn(s, len);
1797 incpush(p, TRUE, TRUE, FALSE, FALSE);
1798 sv_catpvs(sv, "-I");
1799 sv_catpvn(sv, p, len);
1804 Perl_croak(aTHX_ "No directory specified for -I");
1807 forbid_setid('S', -1);
1815 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1817 /* Can't do newSVpvs() as that would involve pre-processor
1818 condititionals inside a macro expansion. */
1819 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1826 # ifdef PERL_DONT_CREATE_GVSV
1827 " PERL_DONT_CREATE_GVSV"
1829 # ifdef PERL_MALLOC_WRAP
1832 # ifdef PERL_MEM_LOG
1835 # ifdef PERL_MEM_LOG_ENV
1838 # ifdef PERL_MEM_LOG_ENV_FD
1839 " PERL_MEM_LOG_ENV_FD"
1841 # ifdef PERL_MEM_LOG_STDERR
1842 " PERL_MEM_LOG_STDERR"
1844 # ifdef PERL_MEM_LOG_TIMESTAMP
1845 " PERL_MEM_LOG_TIMESTAMP"
1847 # ifdef PERL_USE_SAFE_PUTENV
1848 " PERL_USE_SAFE_PUTENV"
1850 # ifdef USE_SITECUSTOMIZE
1851 " USE_SITECUSTOMIZE"
1855 sv_catpv(opts_prog, PL_bincompat_options);
1856 /* Terminate the qw(, and then wrap at 76 columns. */
1857 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1859 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1861 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1864 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1866 #if defined(LOCAL_PATCH_COUNT)
1867 if (LOCAL_PATCH_COUNT > 0) {
1869 sv_catpvs(opts_prog,
1870 "\" Locally applied patches:\\n\",");
1871 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1872 if (PL_localpatches[i])
1873 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1874 0, PL_localpatches[i], 0);
1878 Perl_sv_catpvf(aTHX_ opts_prog,
1879 "\" Built under %s\\n",OSNAME);
1882 Perl_sv_catpvf(aTHX_ opts_prog,
1883 " Compiled at %s %s\\n\"",__DATE__,
1886 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1890 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1891 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1892 "sort grep {/^PERL/} keys %ENV; ");
1894 sv_catpvs(opts_prog,
1895 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1897 sv_catpvs(opts_prog,
1898 "print \" \\%ENV:\\n @env\\n\" if @env;"
1899 "print \" \\@INC:\\n @INC\\n\";");
1903 opts_prog = Perl_newSVpvf(aTHX_
1904 "Config::config_vars(qw%c%s%c)",
1908 av_push(PL_preambleav, opts_prog);
1909 /* don't look for script or read stdin */
1910 scriptname = BIT_BUCKET;
1914 PL_doextract = TRUE;
1922 if (!*++s || isSPACE(*s)) {
1926 /* catch use of gnu style long options */
1927 if (strEQ(s, "version")) {
1931 if (strEQ(s, "help")) {
1938 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1949 #ifndef SECURE_INTERNAL_GETENV
1952 (s = PerlEnv_getenv("PERL5OPT")))
1954 const char *popt = s;
1957 if (*s == '-' && *(s+1) == 'T') {
1958 CHECK_MALLOC_TOO_LATE_FOR('T');
1960 PL_taint_warn = FALSE;
1963 char *popt_copy = NULL;
1976 if (!strchr("CDIMUdmtw", *s))
1977 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1981 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1982 s = popt_copy + (s - popt);
1983 d = popt_copy + (d - popt);
1990 if( !PL_tainting ) {
1991 PL_taint_warn = TRUE;
2002 #ifdef USE_SITECUSTOMIZE
2004 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2005 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2010 scriptname = argv[0];
2013 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2015 else if (scriptname == NULL) {
2017 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2023 /* Set $^X early so that it can be used for relocatable paths in @INC */
2024 assert (!PL_tainted);
2026 S_set_caret_X(aTHX);
2033 = open_script(scriptname, dosearch, &suidscript, &rsfp);
2035 validate_suid(validarg, scriptname, fdscript, suidscript,
2039 # if defined(SIGCHLD) || defined(SIGCLD)
2042 # define SIGCHLD SIGCLD
2044 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2045 if (sigstate == (Sighandler_t) SIG_IGN) {
2046 if (ckWARN(WARN_SIGNAL))
2047 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2048 "Can't ignore signal CHLD, forcing to default");
2049 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2056 #ifdef MACOS_TRADITIONAL
2057 || gMacPerl_AlwaysExtract
2061 /* This will croak if suidscript is >= 0, as -x cannot be used with
2063 forbid_setid('x', suidscript);
2064 /* Hence you can't get here if suidscript >= 0 */
2066 find_beginning(linestr_sv, rsfp);
2067 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2068 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2072 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2073 CvUNIQUE_on(PL_compcv);
2075 CvPADLIST(PL_compcv) = pad_new(0);
2077 PL_isarev = newHV();
2080 boot_core_UNIVERSAL();
2081 boot_core_xsutils();
2085 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2087 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2093 # ifdef HAS_SOCKS5_INIT
2094 socks5_init(argv[0]);
2100 init_predump_symbols();
2101 /* init_postdump_symbols not currently designed to be called */
2102 /* more than once (ENV isn't cleared first, for example) */
2103 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2105 init_postdump_symbols(argc,argv,env);
2107 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2108 * or explicitly in some platforms.
2109 * locale.c:Perl_init_i18nl10n() if the environment
2110 * look like the user wants to use UTF-8. */
2111 #if defined(__SYMBIAN32__)
2112 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2115 /* Requires init_predump_symbols(). */
2116 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2121 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2122 * and the default open disciplines. */
2123 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2124 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2126 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2127 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2128 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2130 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2131 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2132 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2134 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2135 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2136 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2138 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2139 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2142 sv_setpvn(sv, ":utf8\0:utf8", 11);
2144 sv_setpvn(sv, ":utf8\0", 6);
2147 sv_setpvn(sv, "\0:utf8", 6);
2155 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2156 if (strEQ(s, "unsafe"))
2157 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2158 else if (strEQ(s, "safe"))
2159 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2161 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2168 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2172 PL_xmlfp = PerlIO_stdout();
2174 PL_xmlfp = PerlIO_open(s, "w");
2176 Perl_croak(aTHX_ "Can't open %s", s);
2178 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2184 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2185 PL_madskills = atoi(s);
2186 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2191 lex_start(linestr_sv, rsfp, TRUE);
2192 PL_subname = newSVpvs("main");
2194 if (add_read_e_script)
2195 filter_add(read_e_script, NULL);
2197 /* now parse the script */
2199 SETERRNO(0,SS_NORMAL);
2200 #ifdef MACOS_TRADITIONAL
2201 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2203 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2205 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2206 MacPerl_MPWFileName(PL_origfilename));
2210 if (yyparse() || PL_parser->error_count) {
2212 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2214 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2219 CopLINE_set(PL_curcop, 0);
2220 PL_curstash = PL_defstash;
2222 SvREFCNT_dec(PL_e_script);
2230 SAVECOPFILE(PL_curcop);
2231 SAVECOPLINE(PL_curcop);
2232 gv_check(PL_defstash);
2241 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2242 dump_mstats("after compilation:");
2252 =for apidoc perl_run
2254 Tells a Perl interpreter to run. See L<perlembed>.
2267 PERL_UNUSED_ARG(my_perl);
2269 oldscope = PL_scopestack_ix;
2277 cxstack_ix = -1; /* start context stack again */
2279 case 0: /* normal completion */
2283 case 2: /* my_exit() */
2284 while (PL_scopestack_ix > oldscope)
2287 PL_curstash = PL_defstash;
2288 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2289 PL_endav && !PL_minus_c)
2290 call_list(oldscope, PL_endav);
2292 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2293 dump_mstats("after execution: ");
2299 POPSTACK_TO(PL_mainstack);
2302 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2313 S_run_body(pTHX_ I32 oldscope)
2316 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2317 PL_sawampersand ? "Enabling" : "Omitting"));
2319 if (!PL_restartop) {
2323 exit(0); /* less likely to core dump than my_exit(0) */
2326 DEBUG_x(dump_all());
2329 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2331 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2335 #ifdef MACOS_TRADITIONAL
2336 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2337 (gMacPerl_ErrorFormat ? "# " : ""),
2338 MacPerl_MPWFileName(PL_origfilename));
2340 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2344 if (PERLDB_SINGLE && PL_DBsingle)
2345 sv_setiv(PL_DBsingle, 1);
2347 call_list(oldscope, PL_initav);
2348 #ifdef PERL_DEBUG_READONLY_OPS
2349 Perl_pending_Slabs_to_ro(aTHX);
2356 PL_op = PL_restartop;
2360 else if (PL_main_start) {
2361 CvDEPTH(PL_main_cv) = 1;
2362 PL_op = PL_main_start;
2370 =head1 SV Manipulation Functions
2372 =for apidoc p||get_sv
2374 Returns the SV of the specified Perl scalar. If C<create> is set and the
2375 Perl variable does not exist then it will be created. If C<create> is not
2376 set and the variable does not exist then NULL is returned.
2382 Perl_get_sv(pTHX_ const char *name, I32 create)
2385 gv = gv_fetchpv(name, create, SVt_PV);
2392 =head1 Array Manipulation Functions
2394 =for apidoc p||get_av
2396 Returns the AV of the specified Perl array. If C<create> is set and the
2397 Perl variable does not exist then it will be created. If C<create> is not
2398 set and the variable does not exist then NULL is returned.
2404 Perl_get_av(pTHX_ const char *name, I32 create)
2406 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2415 =head1 Hash Manipulation Functions
2417 =for apidoc p||get_hv
2419 Returns the HV of the specified Perl hash. If C<create> is set and the
2420 Perl variable does not exist then it will be created. If C<create> is not
2421 set and the variable does not exist then NULL is returned.
2427 Perl_get_hv(pTHX_ const char *name, I32 create)
2429 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2438 =head1 CV Manipulation Functions
2440 =for apidoc p||get_cvn_flags
2442 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2443 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2444 exist then it will be declared (which has the same effect as saying
2445 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2446 then NULL is returned.
2448 =for apidoc p||get_cv
2450 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2456 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2458 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2459 /* XXX this is probably not what they think they're getting.
2460 * It has the same effect as "sub name;", i.e. just a forward
2462 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2463 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2464 return newSUB(start_subparse(FALSE, 0),
2465 newSVOP(OP_CONST, 0, sv),
2474 Perl_get_cv(pTHX_ const char *name, I32 flags)
2476 return get_cvn_flags(name, strlen(name), flags);
2479 /* Be sure to refetch the stack pointer after calling these routines. */
2483 =head1 Callback Functions
2485 =for apidoc p||call_argv
2487 Performs a callback to the specified Perl sub. See L<perlcall>.
2493 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2495 /* See G_* flags in cop.h */
2496 /* null terminated arg list */
2504 mXPUSHs(newSVpv(*argv,0));
2509 return call_pv(sub_name, flags);
2513 =for apidoc p||call_pv
2515 Performs a callback to the specified Perl sub. See L<perlcall>.
2521 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2522 /* name of the subroutine */
2523 /* See G_* flags in cop.h */
2525 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2529 =for apidoc p||call_method
2531 Performs a callback to the specified Perl method. The blessed object must
2532 be on the stack. See L<perlcall>.
2538 Perl_call_method(pTHX_ const char *methname, I32 flags)
2539 /* name of the subroutine */
2540 /* See G_* flags in cop.h */
2542 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2545 /* May be called with any of a CV, a GV, or an SV containing the name. */
2547 =for apidoc p||call_sv
2549 Performs a callback to the Perl sub whose name is in the SV. See
2556 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2557 /* See G_* flags in cop.h */
2560 LOGOP myop; /* fake syntax tree node */
2565 bool oldcatch = CATCH_GET;
2567 OP* const oldop = PL_op;
2570 if (flags & G_DISCARD) {
2575 Zero(&myop, 1, LOGOP);
2576 myop.op_next = NULL;
2577 if (!(flags & G_NOARGS))
2578 myop.op_flags |= OPf_STACKED;
2579 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2580 (flags & G_ARRAY) ? OPf_WANT_LIST :
2585 EXTEND(PL_stack_sp, 1);
2586 *++PL_stack_sp = sv;
2588 oldscope = PL_scopestack_ix;
2590 if (PERLDB_SUB && PL_curstash != PL_debstash
2591 /* Handle first BEGIN of -d. */
2592 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2593 /* Try harder, since this may have been a sighandler, thus
2594 * curstash may be meaningless. */
2595 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2596 && !(flags & G_NODEBUG))
2597 PL_op->op_private |= OPpENTERSUB_DB;
2599 if (flags & G_METHOD) {
2600 Zero(&method_op, 1, UNOP);
2601 method_op.op_next = PL_op;
2602 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2603 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2604 PL_op = (OP*)&method_op;
2607 if (!(flags & G_EVAL)) {
2609 CALL_BODY_SUB((OP*)&myop);
2610 retval = PL_stack_sp - (PL_stack_base + oldmark);
2611 CATCH_SET(oldcatch);
2614 myop.op_other = (OP*)&myop;
2616 create_eval_scope(flags|G_FAKINGEVAL);
2624 CALL_BODY_SUB((OP*)&myop);
2625 retval = PL_stack_sp - (PL_stack_base + oldmark);
2626 if (!(flags & G_KEEPERR))
2627 sv_setpvn(ERRSV,"",0);
2633 /* my_exit() was called */
2634 PL_curstash = PL_defstash;
2637 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2638 Perl_croak(aTHX_ "Callback called exit");
2643 PL_op = PL_restartop;
2647 PL_stack_sp = PL_stack_base + oldmark;
2648 if (flags & G_ARRAY)
2652 *++PL_stack_sp = &PL_sv_undef;
2657 if (PL_scopestack_ix > oldscope)
2658 delete_eval_scope();
2662 if (flags & G_DISCARD) {
2663 PL_stack_sp = PL_stack_base + oldmark;
2672 /* Eval a string. The G_EVAL flag is always assumed. */
2675 =for apidoc p||eval_sv
2677 Tells Perl to C<eval> the string in the SV.
2683 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2685 /* See G_* flags in cop.h */
2689 UNOP myop; /* fake syntax tree node */
2690 VOL I32 oldmark = SP - PL_stack_base;
2693 OP* const oldop = PL_op;
2696 if (flags & G_DISCARD) {
2703 Zero(PL_op, 1, UNOP);
2704 EXTEND(PL_stack_sp, 1);
2705 *++PL_stack_sp = sv;
2707 if (!(flags & G_NOARGS))
2708 myop.op_flags = OPf_STACKED;
2709 myop.op_next = NULL;
2710 myop.op_type = OP_ENTEREVAL;
2711 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2712 (flags & G_ARRAY) ? OPf_WANT_LIST :
2714 if (flags & G_KEEPERR)
2715 myop.op_flags |= OPf_SPECIAL;
2717 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2718 * before a PUSHEVAL, which corrupts the stack after a croak */
2719 TAINT_PROPER("eval_sv()");
2725 CALL_BODY_EVAL((OP*)&myop);
2726 retval = PL_stack_sp - (PL_stack_base + oldmark);
2727 if (!(flags & G_KEEPERR))
2728 sv_setpvn(ERRSV,"",0);
2734 /* my_exit() was called */
2735 PL_curstash = PL_defstash;
2738 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2739 Perl_croak(aTHX_ "Callback called exit");
2744 PL_op = PL_restartop;
2748 PL_stack_sp = PL_stack_base + oldmark;
2749 if (flags & G_ARRAY)
2753 *++PL_stack_sp = &PL_sv_undef;
2759 if (flags & G_DISCARD) {
2760 PL_stack_sp = PL_stack_base + oldmark;
2770 =for apidoc p||eval_pv
2772 Tells Perl to C<eval> the given string and return an SV* result.
2778 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2782 SV* sv = newSVpv(p, 0);
2784 eval_sv(sv, G_SCALAR);
2791 if (croak_on_error && SvTRUE(ERRSV)) {
2792 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2798 /* Require a module. */
2801 =head1 Embedding Functions
2803 =for apidoc p||require_pv
2805 Tells Perl to C<require> the file named by the string argument. It is
2806 analogous to the Perl code C<eval "require '$file'">. It's even
2807 implemented that way; consider using load_module instead.
2812 Perl_require_pv(pTHX_ const char *pv)
2817 PUSHSTACKi(PERLSI_REQUIRE);
2819 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2820 eval_sv(sv_2mortal(sv), G_DISCARD);
2826 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2828 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2831 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2835 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2837 /* This message really ought to be max 23 lines.
2838 * Removed -h because the user already knows that option. Others? */
2840 static const char * const usage_msg[] = {
2841 "-0[octal] specify record separator (\\0, if no argument)",
2842 "-a autosplit mode with -n or -p (splits $_ into @F)",
2843 "-C[number/list] enables the listed Unicode features",
2844 "-c check syntax only (runs BEGIN and CHECK blocks)",
2845 "-d[:debugger] run program under debugger",
2846 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2847 "-e program one line of program (several -e's allowed, omit programfile)",
2848 "-E program like -e, but enables all optional features",
2849 "-f don't do $sitelib/sitecustomize.pl at startup",
2850 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2851 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2852 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2853 "-l[octal] enable line ending processing, specifies line terminator",
2854 "-[mM][-]module execute \"use/no module...\" before executing program",
2855 "-n assume \"while (<>) { ... }\" loop around program",
2856 "-p assume loop like -n but print line also, like sed",
2857 "-s enable rudimentary parsing for switches after programfile",
2858 "-S look for programfile using PATH environment variable",
2859 "-t enable tainting warnings",
2860 "-T enable tainting checks",
2861 "-u dump core after parsing program",
2862 "-U allow unsafe operations",
2863 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2864 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2865 "-w enable many useful warnings (RECOMMENDED)",
2866 "-W enable all warnings",
2867 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2868 "-X disable all warnings",
2872 const char * const *p = usage_msg;
2874 PerlIO_printf(PerlIO_stdout(),
2875 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2878 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2881 /* convert a string of -D options (or digits) into an int.
2882 * sets *s to point to the char after the options */
2886 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2888 static const char * const usage_msgd[] = {
2889 " Debugging flag values: (see also -d)",
2890 " p Tokenizing and parsing (with v, displays parse stack)",
2891 " s Stack snapshots (with v, displays all stacks)",
2892 " l Context (loop) stack processing",
2893 " t Trace execution",
2894 " o Method and overloading resolution",
2895 " c String/numeric conversions",
2896 " P Print profiling info, source file input state",
2897 " m Memory allocation",
2898 " f Format processing",
2899 " r Regular expression parsing and execution",
2900 " x Syntax tree dump",
2901 " u Tainting checks",
2902 " H Hash dump -- usurps values()",
2903 " X Scratchpad allocation",
2905 " S Thread synchronization",
2907 " R Include reference counts of dumped variables (eg when using -Ds)",
2908 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2909 " v Verbose: use in conjunction with other flags",
2911 " A Consistency checks on internal structures",
2912 " q quiet - currently only suppresses the 'EXECUTING' message",
2917 /* if adding extra options, remember to update DEBUG_MASK */
2918 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2920 for (; isALNUM(**s); (*s)++) {
2921 const char * const d = strchr(debopts,**s);
2923 i |= 1 << (d - debopts);
2924 else if (ckWARN_d(WARN_DEBUGGING))
2925 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2926 "invalid option -D%c, use -D'' to see choices\n", **s);
2929 else if (isDIGIT(**s)) {
2931 for (; isALNUM(**s); (*s)++) ;
2933 else if (givehelp) {
2934 const char *const *p = usage_msgd;
2935 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2938 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2939 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2940 "-Dp not implemented on this platform\n");
2946 /* This routine handles any switches that can be given during run */
2949 Perl_moreswitches(pTHX_ const char *s)
2960 SvREFCNT_dec(PL_rs);
2961 if (s[1] == 'x' && s[2]) {
2962 const char *e = s+=2;
2968 flags = PERL_SCAN_SILENT_ILLDIGIT;
2969 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2970 if (s + numlen < e) {
2971 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2975 PL_rs = newSVpvs("");
2976 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2977 tmps = (U8*)SvPVX(PL_rs);
2978 uvchr_to_utf8(tmps, rschar);
2979 SvCUR_set(PL_rs, UNISKIP(rschar));
2984 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2985 if (rschar & ~((U8)~0))
2986 PL_rs = &PL_sv_undef;
2987 else if (!rschar && numlen >= 2)
2988 PL_rs = newSVpvs("");
2990 char ch = (char)rschar;
2991 PL_rs = newSVpvn(&ch, 1);
2994 sv_setsv(get_sv("/", TRUE), PL_rs);
2999 PL_unicode = parse_unicode_opts( (const char **)&s );
3000 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3006 while (*s && !isSPACE(*s)) ++s;
3007 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3018 forbid_setid('d', -1);
3021 /* -dt indicates to the debugger that threads will be used */
3022 if (*s == 't' && !isALNUM(s[1])) {
3024 my_setenv("PERL5DB_THREADED", "1");
3027 /* The following permits -d:Mod to accepts arguments following an =
3028 in the fashion that -MSome::Mod does. */
3029 if (*s == ':' || *s == '=') {
3030 const char *start = ++s;
3031 const char *const end = s + strlen(s);
3032 SV * const sv = newSVpvs("use Devel::");
3034 /* We now allow -d:Module=Foo,Bar */
3035 while(isALNUM(*s) || *s==':') ++s;
3037 sv_catpvn(sv, start, end - start);
3039 sv_catpvn(sv, start, s-start);
3040 /* Don't use NUL as q// delimiter here, this string goes in the
3042 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3045 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3049 PL_perldb = PERLDB_ALL;
3056 forbid_setid('D', -1);
3058 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3059 #else /* !DEBUGGING */
3060 if (ckWARN_d(WARN_DEBUGGING))
3061 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3062 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3063 for (s++; isALNUM(*s); s++) ;
3068 usage(PL_origargv[0]);
3071 Safefree(PL_inplace);
3072 #if defined(__CYGWIN__) /* do backup extension automagically */
3073 if (*(s+1) == '\0') {
3074 PL_inplace = savepvs(".bak");
3077 #endif /* __CYGWIN__ */
3079 const char * const start = ++s;
3080 while (*s && !isSPACE(*s))
3083 PL_inplace = savepvn(start, s - start);
3087 if (*s == '-') /* Additional switches on #! line. */
3091 case 'I': /* -I handled both here and in parse_body() */
3092 forbid_setid('I', -1);
3094 while (*s && isSPACE(*s))
3099 /* ignore trailing spaces (possibly followed by other switches) */
3101 for (e = p; *e && !isSPACE(*e); e++) ;
3105 } while (*p && *p != '-');
3106 e = savepvn(s, e-s);
3107 incpush(e, TRUE, TRUE, FALSE, FALSE);
3114 Perl_croak(aTHX_ "No directory specified for -I");
3120 SvREFCNT_dec(PL_ors_sv);
3126 PL_ors_sv = newSVpvs("\n");
3127 numlen = 3 + (*s == '0');
3128 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3132 if (RsPARA(PL_rs)) {
3133 PL_ors_sv = newSVpvs("\n\n");
3136 PL_ors_sv = newSVsv(PL_rs);
3141 forbid_setid('M', -1); /* XXX ? */
3144 forbid_setid('m', -1); /* XXX ? */
3149 const char *use = "use ";
3150 /* -M-foo == 'no foo' */
3151 /* Leading space on " no " is deliberate, to make both
3152 possibilities the same length. */
3153 if (*s == '-') { use = " no "; ++s; }
3154 sv = newSVpvn(use,4);
3156 /* We allow -M'Module qw(Foo Bar)' */
3157 while(isALNUM(*s) || *s==':') ++s;
3158 end = s + strlen(s);
3160 sv_catpvn(sv, start, end - start);
3161 if (*(start-1) == 'm') {
3163 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3164 sv_catpvs( sv, " ()");
3168 Perl_croak(aTHX_ "Module name required with -%c option",
3170 sv_catpvn(sv, start, s-start);
3171 /* Use NUL as q''-delimiter. */
3172 sv_catpvs(sv, " split(/,/,q\0");
3174 sv_catpvn(sv, s, end - s);
3175 sv_catpvs(sv, "\0)");
3178 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3181 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3192 forbid_setid('s', -1);
3193 PL_doswitches = TRUE;
3207 #ifdef MACOS_TRADITIONAL
3208 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3210 PL_do_undump = TRUE;
3218 if (!sv_derived_from(PL_patchlevel, "version"))
3219 upg_version(PL_patchlevel, TRUE);
3221 PerlIO_printf(PerlIO_stdout(),
3222 Perl_form(aTHX_ "\nThis is perl, %"SVf
3223 #ifdef PERL_PATCHNUM
3224 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3227 SVfARG(vstringify(PL_patchlevel)),
3230 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3231 PerlIO_printf(PerlIO_stdout(),
3232 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3233 SVfARG(vstringify(PL_patchlevel))));
3234 PerlIO_printf(PerlIO_stdout(),
3235 Perl_form(aTHX_ " built under %s at %s %s\n",
3236 OSNAME, __DATE__, __TIME__));
3237 PerlIO_printf(PerlIO_stdout(),
3238 Perl_form(aTHX_ " OS Specific Release: %s\n",
3242 #if defined(LOCAL_PATCH_COUNT)
3243 if (LOCAL_PATCH_COUNT > 0)
3244 PerlIO_printf(PerlIO_stdout(),
3245 "\n(with %d registered patch%s, "
3246 "see perl -V for more detail)",
3248 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\n\nCopyright 1987-2007, Larry Wall\n");
3253 #ifdef MACOS_TRADITIONAL
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3256 "maintained by Chris Nandor\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3265 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3270 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "atariST series port, ++jrb bammi@cadence.com\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MiNT port by Guido Flohr, 1997-1999\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "EPOC port by Olaf Flebbe, 1999-2002\n");
3309 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3310 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3313 #ifdef __SYMBIAN32__
3314 PerlIO_printf(PerlIO_stdout(),
3315 "Symbian port by Nokia, 2004-2005\n");
3317 #ifdef BINARY_BUILD_NOTICE
3318 BINARY_BUILD_NOTICE;
3320 PerlIO_printf(PerlIO_stdout(),
3322 Perl may be copied only under the terms of either the Artistic License or the\n\
3323 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3324 Complete documentation for Perl, including FAQ lists, should be found on\n\
3325 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3326 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3329 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3330 PL_dowarn |= G_WARN_ON;
3335 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3336 if (!specialWARN(PL_compiling.cop_warnings))
3337 PerlMemShared_free(PL_compiling.cop_warnings);
3338 PL_compiling.cop_warnings = pWARN_ALL ;
3342 PL_dowarn = G_WARN_ALL_OFF;
3343 if (!specialWARN(PL_compiling.cop_warnings))
3344 PerlMemShared_free(PL_compiling.cop_warnings);
3345 PL_compiling.cop_warnings = pWARN_NONE ;
3350 if (s[1] == '-') /* Additional switches on #! line. */
3355 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3361 #ifdef ALTERNATE_SHEBANG
3362 case 'S': /* OS/2 needs -S on "extproc" line. */
3366 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3371 /* compliments of Tom Christiansen */
3373 /* unexec() can be found in the Gnu emacs distribution */
3374 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3377 Perl_my_unexec(pTHX)
3379 PERL_UNUSED_CONTEXT;
3381 SV * prog = newSVpv(BIN_EXP, 0);
3382 SV * file = newSVpv(PL_origfilename, 0);
3386 sv_catpvs(prog, "/perl");
3387 sv_catpvs(file, ".perldump");
3389 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3390 /* unexec prints msg to stderr in case of failure */
3391 PerlProc_exit(status);
3394 # include <lib$routines.h>
3395 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3396 # elif defined(WIN32) || defined(__CYGWIN__)
3397 Perl_croak(aTHX_ "dump is not supported");
3399 ABORT(); /* for use with undump */
3404 /* initialize curinterp */
3410 # define PERLVAR(var,type)
3411 # define PERLVARA(var,n,type)
3412 # if defined(PERL_IMPLICIT_CONTEXT)
3413 # define PERLVARI(var,type,init) aTHX->var = init;
3414 # define PERLVARIC(var,type,init) aTHX->var = init;
3416 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3417 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3419 # include "intrpvar.h"
3425 # define PERLVAR(var,type)
3426 # define PERLVARA(var,n,type)
3427 # define PERLVARI(var,type,init) PL_##var = init;
3428 # define PERLVARIC(var,type,init) PL_##var = init;
3429 # include "intrpvar.h"
3436 /* As these are inside a structure, PERLVARI isn't capable of initialising
3438 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3439 PL_reg_poscache = PL_reg_starttry = NULL;
3443 S_init_main_stash(pTHX)
3448 PL_curstash = PL_defstash = newHV();
3449 /* We know that the string "main" will be in the global shared string
3450 table, so it's a small saving to use it rather than allocate another
3452 PL_curstname = newSVpvs_share("main");
3453 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3454 /* If we hadn't caused another reference to "main" to be in the shared
3455 string table above, then it would be worth reordering these two,
3456 because otherwise all we do is delete "main" from it as a consequence
3457 of the SvREFCNT_dec, only to add it again with hv_name_set */
3458 SvREFCNT_dec(GvHV(gv));
3459 hv_name_set(PL_defstash, "main", 4, 0);
3460 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3462 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3464 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3465 GvMULTI_on(PL_incgv);
3466 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3467 GvMULTI_on(PL_hintgv);
3468 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3469 SvREFCNT_inc_simple_void(PL_defgv);
3470 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3471 SvREFCNT_inc_simple_void(PL_errgv);
3472 GvMULTI_on(PL_errgv);
3473 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3474 GvMULTI_on(PL_replgv);
3475 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3476 #ifdef PERL_DONT_CREATE_GVSV
3479 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3480 sv_setpvn(ERRSV, "", 0);
3481 PL_curstash = PL_defstash;
3482 CopSTASH_set(&PL_compiling, PL_defstash);
3483 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3484 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3486 /* We must init $/ before switches are processed. */
3487 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3491 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3492 int *suidscript, PerlIO **rsfpp)
3500 PL_origfilename = savepvs("-e");
3503 /* if find_script() returns, it returns a malloc()-ed value */
3504 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3506 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3507 const char *s = scriptname + 8;
3513 * Tell apart "normal" usage of fdscript, e.g.
3514 * with bash on FreeBSD:
3515 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3516 * from usage in suidperl.
3517 * Does any "normal" usage leave garbage after the number???
3518 * Is it a mistake to use a similar /dev/fd/ construct for
3523 * Be supersafe and do some sanity-checks.
3524 * Still, can we be sure we got the right thing?
3527 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3530 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3532 scriptname = savepv(s + 1);
3533 Safefree(PL_origfilename);
3534 PL_origfilename = (char *)scriptname;
3539 CopFILE_free(PL_curcop);
3540 CopFILE_set(PL_curcop, PL_origfilename);
3541 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3542 scriptname = (char *)"";
3543 if (fdscript >= 0) {
3544 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3545 # if defined(HAS_FCNTL) && defined(F_SETFD)
3547 /* ensure close-on-exec */
3548 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3553 Perl_croak(aTHX_ "sperl needs fd script\n"
3554 "You should not call sperl directly; do you need to "
3555 "change a #! line\nfrom sperl to perl?\n");
3558 * Do not open (or do other fancy stuff) while setuid.
3559 * Perl does the open, and hands script to suidperl on a fd;
3560 * suidperl only does some checks, sets up UIDs and re-execs
3561 * perl with that fd as it has always done.
3564 if (*suidscript != 1) {
3565 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3568 else if (!*scriptname) {
3569 forbid_setid(0, *suidscript);
3570 *rsfpp = PerlIO_stdin();
3573 #ifdef FAKE_BIT_BUCKET
3574 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3575 * is called) and still have the "-e" work. (Believe it or not,
3576 * a /dev/null is required for the "-e" to work because source
3577 * filter magic is used to implement it. ) This is *not* a general
3578 * replacement for a /dev/null. What we do here is create a temp
3579 * file (an empty file), open up that as the script, and then
3580 * immediately close and unlink it. Close enough for jazz. */
3581 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3582 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3583 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3584 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3585 FAKE_BIT_BUCKET_TEMPLATE
3587 const char * const err = "Failed to create a fake bit bucket";
3588 if (strEQ(scriptname, BIT_BUCKET)) {
3589 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3590 int tmpfd = mkstemp(tmpname);
3592 scriptname = tmpname;
3595 Perl_croak(aTHX_ err);
3598 scriptname = mktemp(tmpname);
3600 Perl_croak(aTHX_ err);
3605 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3606 #ifdef FAKE_BIT_BUCKET
3607 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3608 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3609 && strlen(scriptname) == sizeof(tmpname) - 1) {
3612 scriptname = BIT_BUCKET;
3614 # if defined(HAS_FCNTL) && defined(F_SETFD)
3616 /* ensure close-on-exec */
3617 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3620 #endif /* IAMSUID */
3622 /* PSz 16 Sep 03 Keep neat error message */
3624 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3626 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3627 CopFILE(PL_curcop), Strerror(errno));
3633 * I_SYSSTATVFS HAS_FSTATVFS
3635 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3636 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3637 * here so that metaconfig picks them up. */
3641 S_fd_on_nosuid_fs(pTHX_ int fd)
3644 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3645 * but is needed also on machines without setreuid.
3646 * Seems safe enough to run as root.
3648 int check_okay = 0; /* able to do all the required sys/libcalls */
3649 int on_nosuid = 0; /* the fd is on a nosuid fs */
3651 * Need to check noexec also: nosuid might not be set, the average
3652 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3654 int on_noexec = 0; /* the fd is on a noexec fs */
3657 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3658 * fstatvfs() is UNIX98.
3659 * fstatfs() is 4.3 BSD.
3660 * ustat()+getmnt() is pre-4.3 BSD.
3661 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3662 * an irrelevant filesystem while trying to reach the right one.
3665 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3667 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3668 defined(HAS_FSTATVFS)
3669 # define FD_ON_NOSUID_CHECK_OKAY
3670 struct statvfs stfs;
3672 check_okay = fstatvfs(fd, &stfs) == 0;
3673 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3675 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3676 on platforms where it is present. */
3677 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3679 # endif /* fstatvfs */
3681 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3682 defined(PERL_MOUNT_NOSUID) && \
3683 defined(PERL_MOUNT_NOEXEC) && \
3684 defined(HAS_FSTATFS) && \
3685 defined(HAS_STRUCT_STATFS) && \
3686 defined(HAS_STRUCT_STATFS_F_FLAGS)
3687 # define FD_ON_NOSUID_CHECK_OKAY
3690 check_okay = fstatfs(fd, &stfs) == 0;
3691 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3692 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3693 # endif /* fstatfs */
3695 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3696 defined(PERL_MOUNT_NOSUID) && \
3697 defined(PERL_MOUNT_NOEXEC) && \
3698 defined(HAS_FSTAT) && \
3699 defined(HAS_USTAT) && \
3700 defined(HAS_GETMNT) && \
3701 defined(HAS_STRUCT_FS_DATA) && \
3703 # define FD_ON_NOSUID_CHECK_OKAY
3706 if (fstat(fd, &fdst) == 0) {
3708 if (ustat(fdst.st_dev, &us) == 0) {
3710 /* NOSTAT_ONE here because we're not examining fields which
3711 * vary between that case and STAT_ONE. */
3712 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3713 size_t cmplen = sizeof(us.f_fname);
3714 if (sizeof(fsd.fd_req.path) < cmplen)
3715 cmplen = sizeof(fsd.fd_req.path);
3716 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3717 fdst.st_dev == fsd.fd_req.dev) {
3719 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3720 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3725 # endif /* fstat+ustat+getmnt */
3727 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3728 defined(HAS_GETMNTENT) && \
3729 defined(HAS_HASMNTOPT) && \
3730 defined(MNTOPT_NOSUID) && \
3731 defined(MNTOPT_NOEXEC)
3732 # define FD_ON_NOSUID_CHECK_OKAY
3733 FILE *mtab = fopen("/etc/mtab", "r");
3734 struct mntent *entry;
3737 if (mtab && (fstat(fd, &stb) == 0)) {
3738 while (entry = getmntent(mtab)) {
3739 if (stat(entry->mnt_dir, &fsb) == 0
3740 && fsb.st_dev == stb.st_dev)
3742 /* found the filesystem */
3744 if (hasmntopt(entry, MNTOPT_NOSUID))
3746 if (hasmntopt(entry, MNTOPT_NOEXEC))
3749 } /* A single fs may well fail its stat(). */
3754 # endif /* getmntent+hasmntopt */
3757 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3759 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3761 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3762 return ((!check_okay) || on_nosuid || on_noexec);
3764 #endif /* IAMSUID */
3767 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3768 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3773 #endif /* IAMSUID */
3775 /* do we need to emulate setuid on scripts? */
3777 /* This code is for those BSD systems that have setuid #! scripts disabled
3778 * in the kernel because of a security problem. Merely defining DOSUID
3779 * in perl will not fix that problem, but if you have disabled setuid
3780 * scripts in the kernel, this will attempt to emulate setuid and setgid
3781 * on scripts that have those now-otherwise-useless bits set. The setuid
3782 * root version must be called suidperl or sperlN.NNN. If regular perl
3783 * discovers that it has opened a setuid script, it calls suidperl with
3784 * the same argv that it had. If suidperl finds that the script it has
3785 * just opened is NOT setuid root, it sets the effective uid back to the
3786 * uid. We don't just make perl setuid root because that loses the
3787 * effective uid we had before invoking perl, if it was different from the
3790 * Description/comments above do not match current workings:
3791 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3792 * suidperl called with script open and name changed to /dev/fd/N/X;
3793 * suidperl croaks if script is not setuid;
3794 * making perl setuid would be a huge security risk (and yes, that
3795 * would lose any euid we might have had).
3797 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3798 * be defined in suidperl only. suidperl must be setuid root. The
3799 * Configure script will set this up for you if you want it.
3805 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3806 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3807 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3809 const char *linestr;
3813 if (fdscript < 0 || suidscript != 1)
3814 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3816 * Since the script is opened by perl, not suidperl, some of these
3817 * checks are superfluous. Leaving them in probably does not lower
3821 * Do checks even for systems with no HAS_SETREUID.
3822 * We used to swap, then re-swap UIDs with
3823 # ifdef HAS_SETREUID
3824 if (setreuid(PL_euid,PL_uid) < 0
3825 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3826 Perl_croak(aTHX_ "Can't swap uid and euid");
3828 # ifdef HAS_SETREUID
3829 if (setreuid(PL_uid,PL_euid) < 0
3830 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3831 Perl_croak(aTHX_ "Can't reswap uid and euid");
3835 /* On this access check to make sure the directories are readable,
3836 * there is actually a small window that the user could use to make
3837 * filename point to an accessible directory. So there is a faint
3838 * chance that someone could execute a setuid script down in a
3839 * non-accessible directory. I don't know what to do about that.
3840 * But I don't think it's too important. The manual lies when
3841 * it says access() is useful in setuid programs.
3843 * So, access() is pretty useless... but not harmful... do anyway.
3845 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3846 Perl_croak(aTHX_ "Can't access() script\n");
3849 /* If we can swap euid and uid, then we can determine access rights
3850 * with a simple stat of the file, and then compare device and
3851 * inode to make sure we did stat() on the same file we opened.
3852 * Then we just have to make sure he or she can execute it.
3855 * As the script is opened by perl, not suidperl, we do not need to
3856 * care much about access rights.
3858 * The 'script changed' check is needed, or we can get lied to
3859 * about $0 with e.g.
3860 * suidperl /dev/fd/4//bin/x 4<setuidscript
3861 * Without HAS_SETREUID, is it safe to stat() as root?
3863 * Are there any operating systems that pass /dev/fd/xxx for setuid
3864 * scripts, as suggested/described in perlsec(1)? Surely they do not
3865 * pass the script name as we do, so the "script changed" test would
3866 * fail for them... but we never get here with
3867 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3869 * This is one place where we must "lie" about return status: not
3870 * say if the stat() failed. We are doing this as root, and could
3871 * be tricked into reporting existence or not of files that the
3872 * "plain" user cannot even see.
3876 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3877 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3878 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3879 Perl_croak(aTHX_ "Setuid script changed\n");
3883 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3884 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3887 * We used to do this check as the "plain" user (after swapping
3888 * UIDs). But the check for nosuid and noexec filesystem is needed,
3889 * and should be done even without HAS_SETREUID. (Maybe those
3890 * operating systems do not have such mount options anyway...)
3891 * Seems safe enough to do as root.
3893 # if !defined(NO_NOSUID_CHECK)
3894 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3895 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3898 # endif /* IAMSUID */
3900 if (!S_ISREG(PL_statbuf.st_mode)) {
3901 Perl_croak(aTHX_ "Setuid script not plain file\n");
3903 if (PL_statbuf.st_mode & S_IWOTH)
3904 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3905 PL_doswitches = FALSE; /* -s is insecure in suid */
3906 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3907 CopLINE_inc(PL_curcop);
3908 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3909 Perl_croak(aTHX_ "No #! line");
3910 linestr = SvPV_nolen_const(linestr_sv);
3911 /* required even on Sys V */
3912 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3913 Perl_croak(aTHX_ "No #! line");
3917 /* Sanity check on line length */
3918 s_end = s + strlen(s);
3919 if (s_end == s || (s_end - s) > 4000)
3920 Perl_croak(aTHX_ "Very long #! line");
3921 /* Allow more than a single space after #! */
3922 while (isSPACE(*s)) s++;
3923 /* Sanity check on buffer end */
3924 while ((*s) && !isSPACE(*s)) s++;
3925 for (s2 = s; (s2 > linestr &&
3926 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3927 || s2[-1] == '-')); s2--) ;
3928 /* Sanity check on buffer start */
3929 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3930 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3931 Perl_croak(aTHX_ "Not a perl script");
3932 while (*s == ' ' || *s == '\t') s++;
3934 * #! arg must be what we saw above. They can invoke it by
3935 * mentioning suidperl explicitly, but they may not add any strange
3936 * arguments beyond what #! says if they do invoke suidperl that way.
3939 * The way validarg was set up, we rely on the kernel to start
3940 * scripts with argv[1] set to contain all #! line switches (the
3944 * Check that we got all the arguments listed in the #! line (not
3945 * just that there are no extraneous arguments). Might not matter
3946 * much, as switches from #! line seem to be acted upon (also), and
3947 * so may be checked and trapped in perl. But, security checks must
3948 * be done in suidperl and not deferred to perl. Note that suidperl
3949 * does not get around to parsing (and checking) the switches on
3950 * the #! line (but execs perl sooner).
3951 * Allow (require) a trailing newline (which may be of two
3952 * characters on some architectures?) (but no other trailing
3955 len = strlen(validarg);
3956 if (strEQ(validarg," PHOOEY ") ||
3957 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3958 !((s_end - s) == len+1
3959 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3960 Perl_croak(aTHX_ "Args must match #! line");
3964 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3965 PL_euid == PL_statbuf.st_uid)
3967 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3968 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3969 # endif /* IAMSUID */
3972 PL_euid) { /* oops, we're not the setuid root perl */
3974 * When root runs a setuid script, we do not go through the same
3975 * steps of execing sperl and then perl with fd scripts, but
3976 * simply set up UIDs within the same perl invocation; so do
3977 * not have the same checks (on options, whatever) that we have
3978 * for plain users. No problem really: would have to be a script
3979 * that does not actually work for plain users; and if root is
3980 * foolish and can be persuaded to run such an unsafe script, he
3981 * might run also non-setuid ones, and deserves what he gets.
3983 * Or, we might drop the PL_euid check above (and rely just on
3984 * fdscript to avoid loops), and do the execs
3990 * Pass fd script to suidperl.
3991 * Exec suidperl, substituting fd script for scriptname.
3992 * Pass script name as "subdir" of fd, which perl will grok;
3993 * in fact will use that to distinguish this from "normal"
3994 * usage, see comments above.
3996 PerlIO_rewind(rsfp);
3997 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
3998 /* PSz 27 Feb 04 Sanity checks on scriptname */
3999 if ((!scriptname) || (!*scriptname) ) {
4000 Perl_croak(aTHX_ "No setuid script name\n");
4002 if (*scriptname == '-') {
4003 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4004 /* Or we might confuse it with an option when replacing
4005 * name in argument list, below (though we do pointer, not
4006 * string, comparisons).
4009 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4010 if (!PL_origargv[which]) {
4011 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4013 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4014 PerlIO_fileno(rsfp), PL_origargv[which]));
4015 # if defined(HAS_FCNTL) && defined(F_SETFD)
4016 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4019 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4020 (int)PERL_REVISION, (int)PERL_VERSION,
4021 (int)PERL_SUBVERSION), PL_origargv);
4023 # endif /* IAMSUID */
4024 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4027 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4029 * This seems back to front: we try HAS_SETEGID first; if not available
4030 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4031 * in the sense that we only want to set EGID; but are there any machines
4032 * with either of the latter, but not the former? Same with UID, later.
4035 (void)setegid(PL_statbuf.st_gid);
4037 # ifdef HAS_SETREGID
4038 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4040 # ifdef HAS_SETRESGID
4041 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4043 PerlProc_setgid(PL_statbuf.st_gid);
4047 if (PerlProc_getegid() != PL_statbuf.st_gid)
4048 Perl_croak(aTHX_ "Can't do setegid!\n");
4050 if (PL_statbuf.st_mode & S_ISUID) {
4051 if (PL_statbuf.st_uid != PL_euid)
4053 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4055 # ifdef HAS_SETREUID
4056 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4058 # ifdef HAS_SETRESUID
4059 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4061 PerlProc_setuid(PL_statbuf.st_uid);
4065 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4066 Perl_croak(aTHX_ "Can't do seteuid!\n");
4068 else if (PL_uid) { /* oops, mustn't run as root */
4070 (void)seteuid((Uid_t)PL_uid);
4072 # ifdef HAS_SETREUID
4073 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4075 # ifdef HAS_SETRESUID
4076 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4078 PerlProc_setuid((Uid_t)PL_uid);
4082 if (PerlProc_geteuid() != PL_uid)
4083 Perl_croak(aTHX_ "Can't do seteuid!\n");
4086 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4087 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4090 else if (fdscript < 0 || suidscript != 1)
4091 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4092 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4094 /* PSz 16 Sep 03 Keep neat error message */
4095 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4098 /* We absolutely must clear out any saved ids here, so we */
4099 /* exec the real perl, substituting fd script for scriptname. */
4100 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4102 * It might be thought that using setresgid and/or setresuid (changed to
4103 * set the saved IDs) above might obviate the need to exec, and we could
4104 * go on to "do the perl thing".
4106 * Is there such a thing as "saved GID", and is that set for setuid (but
4107 * not setgid) execution like suidperl? Without exec, it would not be
4108 * cleared for setuid (but not setgid) scripts (or might need a dummy
4111 * We need suidperl to do the exact same argument checking that perl
4112 * does. Thus it cannot be very small; while it could be significantly
4113 * smaller, it is safer (simpler?) to make it essentially the same
4114 * binary as perl (but they are not identical). - Maybe could defer that
4115 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4116 * but prefer to do thorough checks in suidperl itself. Such deferral
4117 * would make suidperl security rely on perl, a design no-no.
4119 * Setuid things should be short and simple, thus easy to understand and
4120 * verify. They should do their "own thing", without influence by
4121 * attackers. It may help if their internal execution flow is fixed,
4122 * regardless of platform: it may be best to exec anyway.
4124 * Suidperl should at least be conceptually simple: a wrapper only,
4125 * never to do any real perl. Maybe we should put
4127 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4129 * into the perly bits.
4131 PerlIO_rewind(rsfp);
4132 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4134 * Keep original arguments: suidperl already has fd script.
4136 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4137 /* if (!PL_origargv[which]) { */
4138 /* errno = EPERM; */
4139 /* Perl_croak(aTHX_ "Permission denied\n"); */
4141 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4142 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4143 # if defined(HAS_FCNTL) && defined(F_SETFD)
4144 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4147 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4148 (int)PERL_REVISION, (int)PERL_VERSION,
4149 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4151 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4152 # endif /* IAMSUID */
4154 PERL_UNUSED_ARG(fdscript);
4155 PERL_UNUSED_ARG(suidscript);
4156 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4157 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4158 PERL_UNUSED_ARG(rsfp);
4160 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4161 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4163 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4166 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4167 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4168 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4169 /* not set-id, must be wrapped */
4172 PERL_UNUSED_ARG(validarg);
4173 PERL_UNUSED_ARG(scriptname);
4174 PERL_UNUSED_ARG(linestr_sv);
4178 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4182 register const char *s2;
4183 #ifdef MACOS_TRADITIONAL
4187 /* skip forward in input to the real script? */
4189 #ifdef MACOS_TRADITIONAL
4190 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4192 while (PL_doextract || gMacPerl_AlwaysExtract) {
4193 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4194 if (!gMacPerl_AlwaysExtract)
4195 Perl_croak(aTHX_ "No Perl script found in input\n");
4197 if (PL_doextract) /* require explicit override ? */
4198 if (!OverrideExtract(PL_origfilename))
4199 Perl_croak(aTHX_ "User aborted script\n");
4201 PL_doextract = FALSE;
4203 /* Pater peccavi, file does not have #! */
4204 PerlIO_rewind(rsfp);
4209 while (PL_doextract) {
4210 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4211 Perl_croak(aTHX_ "No Perl script found in input\n");
4214 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4215 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4216 PL_doextract = FALSE;
4217 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4219 while (*s == ' ' || *s == '\t') s++;
4221 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4222 || s2[-1] == '_') s2--;
4223 if (strnEQ(s2-4,"perl",4))
4224 while ((s = moreswitches(s)))
4227 #ifdef MACOS_TRADITIONAL
4228 /* We are always searching for the #!perl line in MacPerl,
4229 * so if we find it, still keep the line count correct
4230 * by counting lines we already skipped over
4232 for (; maclines > 0 ; maclines--)
4233 PerlIO_ungetc(rsfp, '\n');
4237 /* gMacPerl_AlwaysExtract is false in MPW tool */
4238 } else if (gMacPerl_AlwaysExtract) {
4250 PL_uid = PerlProc_getuid();
4251 PL_euid = PerlProc_geteuid();
4252 PL_gid = PerlProc_getgid();
4253 PL_egid = PerlProc_getegid();
4255 PL_uid |= PL_gid << 16;
4256 PL_euid |= PL_egid << 16;
4258 /* Should not happen: */
4259 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4260 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4263 * Should go by suidscript, not uid!=euid: why disallow
4264 * system("ls") in scripts run from setuid things?
4265 * Or, is this run before we check arguments and set suidscript?
4266 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4267 * (We never have suidscript, can we be sure to have fdscript?)
4268 * Or must then go by UID checks? See comments in forbid_setid also.
4272 /* This is used very early in the lifetime of the program,
4273 * before even the options are parsed, so PL_tainting has
4274 * not been initialized properly. */
4276 Perl_doing_taint(int argc, char *argv[], char *envp[])
4278 #ifndef PERL_IMPLICIT_SYS
4279 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4280 * before we have an interpreter-- and the whole point of this
4281 * function is to be called at such an early stage. If you are on
4282 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4283 * "tainted because running with altered effective ids', you'll
4284 * have to add your own checks somewhere in here. The two most
4285 * known samples of 'implicitness' are Win32 and NetWare, neither
4286 * of which has much of concept of 'uids'. */
4287 int uid = PerlProc_getuid();
4288 int euid = PerlProc_geteuid();
4289 int gid = PerlProc_getgid();
4290 int egid = PerlProc_getegid();
4297 if (uid && (euid != uid || egid != gid))
4299 #endif /* !PERL_IMPLICIT_SYS */
4300 /* This is a really primitive check; environment gets ignored only
4301 * if -T are the first chars together; otherwise one gets
4302 * "Too late" message. */
4303 if ( argc > 1 && argv[1][0] == '-'
4304 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4309 /* Passing the flag as a single char rather than a string is a slight space
4310 optimisation. The only message that isn't /^-.$/ is
4311 "program input from stdin", which is substituted in place of '\0', which
4312 could never be a command line flag. */
4314 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4317 char string[3] = "-x";
4318 const char *message = "program input from stdin";
4325 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4326 if (PL_euid != PL_uid)
4327 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4328 if (PL_egid != PL_gid)
4329 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4330 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4332 * Checks for UID/GID above "wrong": why disallow
4333 * perl -e 'print "Hello\n"'
4334 * from within setuid things?? Simply drop them: replaced by
4335 * fdscript/suidscript and #ifdef IAMSUID checks below.
4337 * This may be too late for command-line switches. Will catch those on
4338 * the #! line, after finding the script name and setting up
4339 * fdscript/suidscript. Note that suidperl does not get around to
4340 * parsing (and checking) the switches on the #! line, but checks that
4341 * the two sets are identical.
4343 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4344 * instead, or would that be "too late"? (We never have suidscript, can
4345 * we be sure to have fdscript?)
4347 * Catch things with suidscript (in descendant of suidperl), even with
4348 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4349 * below; but I am paranoid.
4351 * Also see comments about root running a setuid script, elsewhere.
4353 if (suidscript >= 0)
4354 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4356 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4357 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4358 #endif /* IAMSUID */
4362 Perl_init_debugger(pTHX)
4365 HV * const ostash = PL_curstash;
4367 PL_curstash = PL_debstash;
4368 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4370 AvREAL_off(PL_dbargs);
4371 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4372 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4373 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4374 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4375 sv_setiv(PL_DBsingle, 0);
4376 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4377 sv_setiv(PL_DBtrace, 0);
4378 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4379 sv_setiv(PL_DBsignal, 0);
4380 PL_curstash = ostash;
4383 #ifndef STRESS_REALLOC
4384 #define REASONABLE(size) (size)
4386 #define REASONABLE(size) (1) /* unreasonable */
4390 Perl_init_stacks(pTHX)
4393 /* start with 128-item stack and 8K cxstack */
4394 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4395 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4396 PL_curstackinfo->si_type = PERLSI_MAIN;
4397 PL_curstack = PL_curstackinfo->si_stack;
4398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4400 PL_stack_base = AvARRAY(PL_curstack);
4401 PL_stack_sp = PL_stack_base;
4402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4404 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4407 PL_tmps_max = REASONABLE(128);
4409 Newx(PL_markstack,REASONABLE(32),I32);
4410 PL_markstack_ptr = PL_markstack;
4411 PL_markstack_max = PL_markstack + REASONABLE(32);
4415 Newx(PL_scopestack,REASONABLE(32),I32);
4416 PL_scopestack_ix = 0;
4417 PL_scopestack_max = REASONABLE(32);
4419 Newx(PL_savestack,REASONABLE(128),ANY);
4420 PL_savestack_ix = 0;
4421 PL_savestack_max = REASONABLE(128);
4430 while (PL_curstackinfo->si_next)
4431 PL_curstackinfo = PL_curstackinfo->si_next;
4432 while (PL_curstackinfo) {
4433 PERL_SI *p = PL_curstackinfo->si_prev;
4434 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4435 Safefree(PL_curstackinfo->si_cxstack);
4436 Safefree(PL_curstackinfo);
4437 PL_curstackinfo = p;
4439 Safefree(PL_tmps_stack);
4440 Safefree(PL_markstack);
4441 Safefree(PL_scopestack);
4442 Safefree(PL_savestack);
4447 S_init_predump_symbols(pTHX)
4453 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4454 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4455 GvMULTI_on(PL_stdingv);
4456 io = GvIOp(PL_stdingv);
4457 IoTYPE(io) = IoTYPE_RDONLY;
4458 IoIFP(io) = PerlIO_stdin();
4459 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4461 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4463 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4466 IoTYPE(io) = IoTYPE_WRONLY;
4467 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4469 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4471 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4473 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4474 GvMULTI_on(PL_stderrgv);
4475 io = GvIOp(PL_stderrgv);
4476 IoTYPE(io) = IoTYPE_WRONLY;
4477 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4478 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4480 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4482 PL_statname = newSV(0); /* last filename we did stat on */
4484 Safefree(PL_osname);
4485 PL_osname = savepv(OSNAME);
4489 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4492 argc--,argv++; /* skip name of script */
4493 if (PL_doswitches) {
4494 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4498 if (argv[0][1] == '-' && !argv[0][2]) {
4502 if ((s = strchr(argv[0], '='))) {
4503 const char *const start_name = argv[0] + 1;
4504 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4505 TRUE, SVt_PV)), s + 1);
4508 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4511 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4512 GvMULTI_on(PL_argvgv);
4513 (void)gv_AVadd(PL_argvgv);
4514 av_clear(GvAVn(PL_argvgv));
4515 for (; argc > 0; argc--,argv++) {
4516 SV * const sv = newSVpv(argv[0],0);
4517 av_push(GvAVn(PL_argvgv),sv);
4518 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4519 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4522 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4523 (void)sv_utf8_decode(sv);
4529 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4534 PL_toptarget = newSV_type(SVt_PVFM);
4535 sv_setpvn(PL_toptarget, "", 0);
4536 PL_bodytarget = newSV_type(SVt_PVFM);
4537 sv_setpvn(PL_bodytarget, "", 0);
4538 PL_formtarget = PL_bodytarget;
4542 init_argv_symbols(argc,argv);
4544 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4545 #ifdef MACOS_TRADITIONAL
4546 /* $0 is not majick on a Mac */
4547 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4549 sv_setpv(GvSV(tmpgv),PL_origfilename);
4550 magicname("0", "0", 1);
4553 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4555 bool env_is_not_environ;
4556 GvMULTI_on(PL_envgv);
4557 hv = GvHVn(PL_envgv);
4558 hv_magic(hv, NULL, PERL_MAGIC_env);
4560 #ifdef USE_ENVIRON_ARRAY
4561 /* Note that if the supplied env parameter is actually a copy
4562 of the global environ then it may now point to free'd memory
4563 if the environment has been modified since. To avoid this
4564 problem we treat env==NULL as meaning 'use the default'
4568 env_is_not_environ = env != environ;
4569 if (env_is_not_environ
4570 # ifdef USE_ITHREADS
4571 && PL_curinterp == aTHX
4580 for (; *env; env++) {
4581 if (!(s = strchr(*env,'=')) || s == *env)
4583 #if defined(MSDOS) && !defined(DJGPP)
4588 sv = newSVpv(s+1, 0);
4589 (void)hv_store(hv, *env, s - *env, sv, 0);
4590 if (env_is_not_environ)
4594 #endif /* USE_ENVIRON_ARRAY */
4595 #endif /* !PERL_MICRO */
4598 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4599 SvREADONLY_off(GvSV(tmpgv));
4600 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4601 SvREADONLY_on(GvSV(tmpgv));
4603 #ifdef THREADS_HAVE_PIDS
4604 PL_ppid = (IV)getppid();
4607 /* touch @F array to prevent spurious warnings 20020415 MJD */
4609 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4614 S_init_perllib(pTHX)
4620 s = PerlEnv_getenv("PERL5LIB");
4622 * It isn't possible to delete an environment variable with
4623 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4624 * case we treat PERL5LIB as undefined if it has a zero-length value.
4626 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4627 if (s && *s != '\0')
4631 incpush(s, TRUE, TRUE, TRUE, FALSE);
4633 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4635 /* Treat PERL5?LIB as a possible search list logical name -- the
4636 * "natural" VMS idiom for a Unix path string. We allow each
4637 * element to be a set of |-separated directories for compatibility.
4641 if (my_trnlnm("PERL5LIB",buf,0))
4642 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4644 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4648 /* Use the ~-expanded versions of APPLLIB (undocumented),
4649 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4652 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4656 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4658 #ifdef MACOS_TRADITIONAL
4661 SV * privdir = newSV(0);
4662 char * macperl = PerlEnv_getenv("MACPERL");
4667 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4668 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4669 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4670 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4671 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4672 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4674 SvREFCNT_dec(privdir);
4677 incpush(":", FALSE, FALSE, TRUE, FALSE);
4680 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4683 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4685 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4689 /* sitearch is always relative to sitelib on Windows for
4690 * DLL-based path intuition to work correctly */
4691 # if !defined(WIN32)
4692 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4698 /* this picks up sitearch as well */
4699 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4701 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4705 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4706 /* Search for version-specific dirs below here */
4707 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4710 #ifdef PERL_VENDORARCH_EXP
4711 /* vendorarch is always relative to vendorlib on Windows for
4712 * DLL-based path intuition to work correctly */
4713 # if !defined(WIN32)
4714 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4718 #ifdef PERL_VENDORLIB_EXP
4720 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4722 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4726 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4727 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4730 #ifdef PERL_OTHERLIBDIRS
4731 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4735 incpush(".", FALSE, FALSE, TRUE, FALSE);
4736 #endif /* MACOS_TRADITIONAL */
4739 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4740 # define PERLLIB_SEP ';'
4743 # define PERLLIB_SEP '|'
4745 # if defined(MACOS_TRADITIONAL)
4746 # define PERLLIB_SEP ','
4748 # define PERLLIB_SEP ':'
4752 #ifndef PERLLIB_MANGLE
4753 # define PERLLIB_MANGLE(s,n) (s)
4756 /* Push a directory onto @INC if it exists.
4757 Generate a new SV if we do this, to save needing to copy the SV we push
4760 S_incpush_if_exists(pTHX_ SV *dir)
4764 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4765 S_ISDIR(tmpstatbuf.st_mode)) {
4766 av_push(GvAVn(PL_incgv), dir);
4773 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4778 const char *p = dir;
4783 if (addsubdirs || addoldvers) {
4787 /* Break at all separators */
4789 SV *libdir = newSV(0);
4792 /* skip any consecutive separators */
4794 while ( *p == PERLLIB_SEP ) {
4795 /* Uncomment the next line for PATH semantics */
4796 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4801 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4802 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4807 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4808 p = NULL; /* break out */
4810 #ifdef MACOS_TRADITIONAL
4811 if (!strchr(SvPVX(libdir), ':')) {
4814 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4816 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4817 sv_catpvs(libdir, ":");
4820 /* Do the if() outside the #ifdef to avoid warnings about an unused
4823 #ifdef PERL_RELOCATABLE_INC
4825 * Relocatable include entries are marked with a leading .../
4828 * 0: Remove that leading ".../"
4829 * 1: Remove trailing executable name (anything after the last '/')
4830 * from the perl path to give a perl prefix
4832 * While the @INC element starts "../" and the prefix ends with a real
4833 * directory (ie not . or ..) chop that real directory off the prefix
4834 * and the leading "../" from the @INC element. ie a logical "../"
4836 * Finally concatenate the prefix and the remainder of the @INC element
4837 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4838 * generates /usr/local/lib/perl5
4840 const char *libpath = SvPVX(libdir);
4841 STRLEN libpath_len = SvCUR(libdir);
4842 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4844 SV * const caret_X = get_sv("\030", 0);
4845 /* Going to use the SV just as a scratch buffer holding a C
4851 /* $^X is *the* source of taint if tainting is on, hence
4852 SvPOK() won't be true. */
4854 assert(SvPOKp(caret_X));
4855 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4857 /* Firstly take off the leading .../
4858 If all else fail we'll do the paths relative to the current
4860 sv_chop(libdir, libpath + 4);
4861 /* Don't use SvPV as we're intentionally bypassing taining,
4862 mortal copies that the mg_get of tainting creates, and
4863 corruption that seems to come via the save stack.
4864 I guess that the save stack isn't correctly set up yet. */
4865 libpath = SvPVX(libdir);
4866 libpath_len = SvCUR(libdir);
4868 /* This would work more efficiently with memrchr, but as it's
4869 only a GNU extension we'd need to probe for it and
4870 implement our own. Not hard, but maybe not worth it? */
4872 prefix = SvPVX(prefix_sv);
4873 lastslash = strrchr(prefix, '/');
4875 /* First time in with the *lastslash = '\0' we just wipe off
4876 the trailing /perl from (say) /usr/foo/bin/perl
4880 while ((*lastslash = '\0'), /* Do that, come what may. */
4881 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4882 && (lastslash = strrchr(prefix, '/')))) {
4883 if (lastslash[1] == '\0'
4884 || (lastslash[1] == '.'
4885 && (lastslash[2] == '/' /* ends "/." */
4886 || (lastslash[2] == '/'
4887 && lastslash[3] == '/' /* or "/.." */
4889 /* Prefix ends "/" or "/." or "/..", any of which
4890 are fishy, so don't do any more logical cleanup.
4894 /* Remove leading "../" from path */
4897 /* Next iteration round the loop removes the last
4898 directory name from prefix by writing a '\0' in
4899 the while clause. */
4901 /* prefix has been terminated with a '\0' to the correct
4902 length. libpath points somewhere into the libdir SV.
4903 We need to join the 2 with '/' and drop the result into
4905 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4906 SvREFCNT_dec(libdir);
4907 /* And this is the new libdir. */
4910 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4911 /* Need to taint reloccated paths if running set ID */
4912 SvTAINTED_on(libdir);
4915 SvREFCNT_dec(prefix_sv);
4920 * BEFORE pushing libdir onto @INC we may first push version- and
4921 * archname-specific sub-directories.
4923 if (addsubdirs || addoldvers) {
4924 #ifdef PERL_INC_VERSION_LIST
4925 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4926 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4927 const char * const *incver;
4933 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4935 while (unix[len-1] == '/') len--; /* Cosmetic */
4936 sv_usepvn(libdir,unix,len);
4939 PerlIO_printf(Perl_error_log,
4940 "Failed to unixify @INC element \"%s\"\n",
4944 #ifdef MACOS_TRADITIONAL
4945 #define PERL_AV_SUFFIX_FMT ""
4946 #define PERL_ARCH_FMT "%s:"
4947 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4949 #define PERL_AV_SUFFIX_FMT "/"
4950 #define PERL_ARCH_FMT "/%s"
4951 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4953 /* .../version/archname if -d .../version/archname */
4954 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4956 (int)PERL_REVISION, (int)PERL_VERSION,
4957 (int)PERL_SUBVERSION, ARCHNAME);
4958 subdir = S_incpush_if_exists(aTHX_ subdir);
4960 /* .../version if -d .../version */
4961 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4963 (int)PERL_REVISION, (int)PERL_VERSION,
4964 (int)PERL_SUBVERSION);
4965 subdir = S_incpush_if_exists(aTHX_ subdir);
4967 /* .../archname if -d .../archname */
4968 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4969 SVfARG(libdir), ARCHNAME);
4970 subdir = S_incpush_if_exists(aTHX_ subdir);
4974 #ifdef PERL_INC_VERSION_LIST
4976 for (incver = incverlist; *incver; incver++) {
4977 /* .../xxx if -d .../xxx */
4978 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4979 SVfARG(libdir), *incver);
4980 subdir = S_incpush_if_exists(aTHX_ subdir);
4986 /* finally push this lib directory on the end of @INC */
4987 av_push(GvAVn(PL_incgv), libdir);
4990 assert (SvREFCNT(subdir) == 1);
4991 SvREFCNT_dec(subdir);
4997 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5001 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5007 while (av_len(paramList) >= 0) {
5008 cv = (CV*)av_shift(paramList);
5010 if (paramList == PL_beginav) {
5011 /* save PL_beginav for compiler */
5012 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5014 else if (paramList == PL_checkav) {
5015 /* save PL_checkav for compiler */
5016 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5018 else if (paramList == PL_unitcheckav) {
5019 /* save PL_unitcheckav for compiler */
5020 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5031 PL_madskills |= 16384;
5036 PL_madskills &= ~16384;
5039 (void)SvPV_const(atsv, len);
5041 PL_curcop = &PL_compiling;
5042 CopLINE_set(PL_curcop, oldline);
5043 if (paramList == PL_beginav)
5044 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5046 Perl_sv_catpvf(aTHX_ atsv,
5047 "%s failed--call queue aborted",
5048 paramList == PL_checkav ? "CHECK"
5049 : paramList == PL_initav ? "INIT"
5050 : paramList == PL_unitcheckav ? "UNITCHECK"
5052 while (PL_scopestack_ix > oldscope)
5055 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5062 /* my_exit() was called */
5063 while (PL_scopestack_ix > oldscope)
5066 PL_curstash = PL_defstash;
5067 PL_curcop = &PL_compiling;
5068 CopLINE_set(PL_curcop, oldline);
5070 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5071 if (paramList == PL_beginav)
5072 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5074 Perl_croak(aTHX_ "%s failed--call queue aborted",
5075 paramList == PL_checkav ? "CHECK"
5076 : paramList == PL_initav ? "INIT"
5077 : paramList == PL_unitcheckav ? "UNITCHECK"
5084 PL_curcop = &PL_compiling;
5085 CopLINE_set(PL_curcop, oldline);
5088 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5097 Perl_my_exit(pTHX_ U32 status)
5100 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5101 (void*)thr, (unsigned long) status));
5110 STATUS_EXIT_SET(status);
5117 Perl_my_failure_exit(pTHX)
5121 /* We have been called to fall on our sword. The desired exit code
5122 * should be already set in STATUS_UNIX, but could be shifted over
5123 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5126 * If an error code has not been set, then force the issue.
5128 if (MY_POSIX_EXIT) {
5130 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5131 * the exit code when there isn't an error.
5134 if (STATUS_UNIX == 0)
5135 STATUS_UNIX_EXIT_SET(255);
5137 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5139 /* The exit code could have been set by $? or vmsish which
5140 * means that it may not be fatal. So convert
5141 * success/warning codes to fatal.
5143 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5144 STATUS_UNIX_EXIT_SET(255);
5148 /* Traditionally Perl on VMS always expects a Fatal Error. */
5149 if (vaxc$errno & 1) {
5151 /* So force success status to failure */
5152 if (STATUS_NATIVE & 1)
5157 STATUS_UNIX = EINTR; /* In case something cares */
5162 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5164 /* Encode the severity code */
5165 severity = STATUS_NATIVE & STS$M_SEVERITY;
5166 STATUS_UNIX = (severity ? severity : 1) << 8;
5168 /* Perl expects this to be a fatal error */
5169 if (severity != STS$K_SEVERE)
5178 STATUS_UNIX_SET(errno);
5180 exitstatus = STATUS_UNIX >> 8;
5181 if (exitstatus & 255)
5182 STATUS_UNIX_SET(exitstatus);
5184 STATUS_UNIX_SET(255);
5191 S_my_exit_jump(pTHX)
5196 SvREFCNT_dec(PL_e_script);
5200 POPSTACK_TO(PL_mainstack);
5208 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5211 const char * const p = SvPVX_const(PL_e_script);
5212 const char *nl = strchr(p, '\n');
5214 PERL_UNUSED_ARG(idx);
5215 PERL_UNUSED_ARG(maxlen);
5217 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5219 filter_del(read_e_script);
5222 sv_catpvn(buf_sv, p, nl-p);
5223 sv_chop(PL_e_script, nl);
5229 * c-indentation-style: bsd
5231 * indent-tabs-mode: t
5234 * ex: set ts=8 sts=4 sw=4 noet: