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 a list of empty elements. It needs to be initialised
357 else all hell breaks loose in S_find_uninit_var(). */
358 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
359 PL_regex_pad = AvARRAY(PL_regex_padav);
361 #ifdef USE_REENTRANT_API
362 Perl_reentrant_init(aTHX);
365 /* Note that strtab is a rather special HV. Assumptions are made
366 about not iterating on it, and not adding tie magic to it.
367 It is properly deallocated in perl_destruct() */
370 HvSHAREKEYS_off(PL_strtab); /* mandatory */
371 hv_ksplit(PL_strtab, 512);
373 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
374 _dyld_lookup_and_bind
375 ("__environ", (unsigned long *) &environ_pointer, NULL);
379 # ifdef USE_ENVIRON_ARRAY
380 PL_origenviron = environ;
384 /* Use sysconf(_SC_CLK_TCK) if available, if not
385 * available or if the sysconf() fails, use the HZ.
386 * BeOS has those, but returns the wrong value.
387 * The HZ if not originally defined has been by now
388 * been defined as CLK_TCK, if available. */
389 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
390 PL_clocktick = sysconf(_SC_CLK_TCK);
391 if (PL_clocktick <= 0)
395 PL_stashcache = newHV();
397 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
398 (int)PERL_VERSION, (int)PERL_SUBVERSION);
401 if (!PL_mmap_page_size) {
402 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
404 SETERRNO(0, SS_NORMAL);
406 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
408 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
410 if ((long) PL_mmap_page_size < 0) {
412 SV * const error = ERRSV;
413 SvUPGRADE(error, SVt_PV);
414 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
417 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
421 # ifdef HAS_GETPAGESIZE
422 PL_mmap_page_size = getpagesize();
424 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
425 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
429 if (PL_mmap_page_size <= 0)
430 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
431 (IV) PL_mmap_page_size);
433 #endif /* HAS_MMAP */
435 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
436 PL_timesbase.tms_utime = 0;
437 PL_timesbase.tms_stime = 0;
438 PL_timesbase.tms_cutime = 0;
439 PL_timesbase.tms_cstime = 0;
446 =for apidoc nothreadhook
448 Stub that provides thread hook for perl_destruct when there are
455 Perl_nothreadhook(pTHX)
461 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
463 Perl_dump_sv_child(pTHX_ SV *sv)
466 const int sock = PL_dumper_fd;
467 const int debug_fd = PerlIO_fileno(Perl_debug_log);
468 union control_un control;
471 struct cmsghdr *cmptr;
473 unsigned char buffer[256];
475 if(sock == -1 || debug_fd == -1)
478 PerlIO_flush(Perl_debug_log);
480 /* All these shenanigans are to pass a file descriptor over to our child for
481 it to dump out to. We can't let it hold open the file descriptor when it
482 forks, as the file descriptor it will dump to can turn out to be one end
483 of pipe that some other process will wait on for EOF. (So as it would
484 be open, the wait would be forever.) */
486 msg.msg_control = control.control;
487 msg.msg_controllen = sizeof(control.control);
488 /* We're a connected socket so we don't need a destination */
494 cmptr = CMSG_FIRSTHDR(&msg);
495 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
496 cmptr->cmsg_level = SOL_SOCKET;
497 cmptr->cmsg_type = SCM_RIGHTS;
498 *((int *)CMSG_DATA(cmptr)) = 1;
500 vec[0].iov_base = (void*)&sv;
501 vec[0].iov_len = sizeof(sv);
502 got = sendmsg(sock, &msg, 0);
505 perror("Debug leaking scalars parent sendmsg failed");
508 if(got < sizeof(sv)) {
509 perror("Debug leaking scalars parent short sendmsg");
513 /* Return protocol is
515 unsigned char: length of location string (0 for empty)
516 unsigned char*: string (not terminated)
518 vec[0].iov_base = (void*)&returned_errno;
519 vec[0].iov_len = sizeof(returned_errno);
520 vec[1].iov_base = buffer;
523 got = readv(sock, vec, 2);
526 perror("Debug leaking scalars parent read failed");
527 PerlIO_flush(PerlIO_stderr());
530 if(got < sizeof(returned_errno) + 1) {
531 perror("Debug leaking scalars parent short read");
532 PerlIO_flush(PerlIO_stderr());
537 got = read(sock, buffer + 1, *buffer);
539 perror("Debug leaking scalars parent read 2 failed");
540 PerlIO_flush(PerlIO_stderr());
545 perror("Debug leaking scalars parent short read 2");
546 PerlIO_flush(PerlIO_stderr());
551 if (returned_errno || *buffer) {
552 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
553 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
554 returned_errno, strerror(returned_errno));
560 =for apidoc perl_destruct
562 Shuts down a Perl interpreter. See L<perlembed>.
571 VOL signed char destruct_level; /* see possible values in intrpvar.h */
573 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
577 PERL_UNUSED_ARG(my_perl);
579 /* wait for all pseudo-forked children to finish */
580 PERL_WAIT_FOR_CHILDREN;
582 destruct_level = PL_perl_destruct_level;
585 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
587 const int i = atoi(s);
588 if (destruct_level < i)
594 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
600 if (PL_endav && !PL_minus_c)
601 call_list(PL_scopestack_ix, PL_endav);
607 /* Need to flush since END blocks can produce output */
610 if (CALL_FPTR(PL_threadhook)(aTHX)) {
611 /* Threads hook has vetoed further cleanup */
612 PL_veto_cleanup = TRUE;
616 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
617 if (destruct_level != 0) {
618 /* Fork here to create a child. Our child's job is to preserve the
619 state of scalars prior to destruction, so that we can instruct it
620 to dump any scalars that we later find have leaked.
621 There's no subtlety in this code - it assumes POSIX, and it doesn't
625 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
626 perror("Debug leaking scalars socketpair failed");
632 perror("Debug leaking scalars fork failed");
636 /* We are the child */
637 const int sock = fd[1];
638 const int debug_fd = PerlIO_fileno(Perl_debug_log);
641 /* Our success message is an integer 0, and a char 0 */
642 static const char success[sizeof(int) + 1];
646 /* We need to close all other file descriptors otherwise we end up
647 with interesting hangs, where the parent closes its end of a
648 pipe, and sits waiting for (another) child to terminate. Only
649 that child never terminates, because it never gets EOF, because
650 we also have the far end of the pipe open. We even need to
651 close the debugging fd, because sometimes it happens to be one
652 end of a pipe, and a process is waiting on the other end for
653 EOF. Normally it would be closed at some point earlier in
654 destruction, but if we happen to cause the pipe to remain open,
655 EOF never occurs, and we get an infinite hang. Hence all the
656 games to pass in a file descriptor if it's actually needed. */
658 f = sysconf(_SC_OPEN_MAX);
660 where = "sysconf failed";
671 union control_un control;
674 struct cmsghdr *cmptr;
678 msg.msg_control = control.control;
679 msg.msg_controllen = sizeof(control.control);
680 /* We're a connected socket so we don't need a source */
684 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
686 vec[0].iov_base = (void*)⌖
687 vec[0].iov_len = sizeof(target);
689 got = recvmsg(sock, &msg, 0);
694 where = "recv failed";
697 if(got < sizeof(target)) {
698 where = "short recv";
702 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
706 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
707 where = "wrong cmsg_len";
710 if(cmptr->cmsg_level != SOL_SOCKET) {
711 where = "wrong cmsg_level";
714 if(cmptr->cmsg_type != SCM_RIGHTS) {
715 where = "wrong cmsg_type";
719 got_fd = *(int*)CMSG_DATA(cmptr);
720 /* For our last little bit of trickery, put the file descriptor
721 back into Perl_debug_log, as if we never actually closed it
723 if(got_fd != debug_fd) {
724 if (dup2(got_fd, debug_fd) == -1) {
731 PerlIO_flush(Perl_debug_log);
733 got = write(sock, &success, sizeof(success));
736 where = "write failed";
739 if(got < sizeof(success)) {
740 where = "short write";
747 int send_errno = errno;
748 unsigned char length = (unsigned char) strlen(where);
749 struct iovec failure[3] = {
750 {(void*)&send_errno, sizeof(send_errno)},
752 {(void*)where, length}
754 int got = writev(sock, failure, 3);
755 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
756 in the parent if we try to read from the socketpair after the
757 child has exited, even if there was data to read.
758 So sleep a bit to give the parent a fighting chance of
761 _exit((got == -1) ? errno : 0);
765 PL_dumper_fd = fd[0];
770 /* We must account for everything. */
772 /* Destroy the main CV and syntax tree */
773 /* Do this now, because destroying ops can cause new SVs to be generated
774 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
775 PL_curcop to point to a valid op from which the filename structure
777 PL_curcop = &PL_compiling;
779 /* ensure comppad/curpad to refer to main's pad */
780 if (CvPADLIST(PL_main_cv)) {
781 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
783 op_free(PL_main_root);
786 PL_main_start = NULL;
787 SvREFCNT_dec(PL_main_cv);
791 /* Tell PerlIO we are about to tear things apart in case
792 we have layers which are using resources that should
796 PerlIO_destruct(aTHX);
798 if (PL_sv_objcount) {
800 * Try to destruct global references. We do this first so that the
801 * destructors and destructees still exist. Some sv's might remain.
802 * Non-referenced objects are on their own.
806 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
807 PL_defoutgv = NULL; /* may have been freed */
810 /* unhook hooks which will soon be, or use, destroyed data */
811 SvREFCNT_dec(PL_warnhook);
813 SvREFCNT_dec(PL_diehook);
816 /* call exit list functions */
817 while (PL_exitlistlen-- > 0)
818 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
820 Safefree(PL_exitlist);
825 /* jettison our possibly duplicated environment */
826 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
827 * so we certainly shouldn't free it here
830 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
831 if (environ != PL_origenviron && !PL_use_safe_putenv
833 /* only main thread can free environ[0] contents */
834 && PL_curinterp == aTHX
840 for (i = 0; environ[i]; i++)
841 safesysfree(environ[i]);
843 /* Must use safesysfree() when working with environ. */
844 safesysfree(environ);
846 environ = PL_origenviron;
849 #endif /* !PERL_MICRO */
851 if (destruct_level == 0) {
853 DEBUG_P(debprofdump());
855 #if defined(PERLIO_LAYERS)
856 /* No more IO - including error messages ! */
857 PerlIO_cleanup(aTHX);
860 CopFILE_free(&PL_compiling);
861 CopSTASH_free(&PL_compiling);
863 /* The exit() function will do everything that needs doing. */
867 /* reset so print() ends up where we expect */
871 /* the syntax tree is shared between clones
872 * so op_free(PL_main_root) only ReREFCNT_dec's
873 * REGEXPs in the parent interpreter
874 * we need to manually ReREFCNT_dec for the clones
876 SvREFCNT_dec(PL_regex_padav);
877 PL_regex_padav = NULL;
881 SvREFCNT_dec((SV*) PL_stashcache);
882 PL_stashcache = NULL;
884 /* loosen bonds of global variables */
886 /* XXX can PL_parser still be non-null here? */
887 if(PL_parser && PL_parser->rsfp) {
888 (void)PerlIO_close(PL_parser->rsfp);
889 PL_parser->rsfp = NULL;
893 Safefree(PL_splitstr);
903 PL_doswitches = FALSE;
904 PL_dowarn = G_WARN_OFF;
905 PL_doextract = FALSE;
906 PL_sawampersand = FALSE; /* must save all match strings */
909 Safefree(PL_inplace);
911 SvREFCNT_dec(PL_patchlevel);
914 SvREFCNT_dec(PL_e_script);
920 /* magical thingies */
922 SvREFCNT_dec(PL_ofs_sv); /* $, */
925 SvREFCNT_dec(PL_ors_sv); /* $\ */
928 SvREFCNT_dec(PL_rs); /* $/ */
931 Safefree(PL_osname); /* $^O */
934 SvREFCNT_dec(PL_statname);
938 /* defgv, aka *_ should be taken care of elsewhere */
940 /* clean up after study() */
941 SvREFCNT_dec(PL_lastscream);
942 PL_lastscream = NULL;
943 Safefree(PL_screamfirst);
945 Safefree(PL_screamnext);
949 Safefree(PL_efloatbuf);
953 /* startup and shutdown function lists */
954 SvREFCNT_dec(PL_beginav);
955 SvREFCNT_dec(PL_beginav_save);
956 SvREFCNT_dec(PL_endav);
957 SvREFCNT_dec(PL_checkav);
958 SvREFCNT_dec(PL_checkav_save);
959 SvREFCNT_dec(PL_unitcheckav);
960 SvREFCNT_dec(PL_unitcheckav_save);
961 SvREFCNT_dec(PL_initav);
963 PL_beginav_save = NULL;
966 PL_checkav_save = NULL;
967 PL_unitcheckav = NULL;
968 PL_unitcheckav_save = NULL;
971 /* shortcuts just get cleared */
980 PL_last_in_gv = NULL;
992 SvREFCNT_dec(PL_argvout_stack);
993 PL_argvout_stack = NULL;
995 SvREFCNT_dec(PL_modglobal);
997 SvREFCNT_dec(PL_preambleav);
998 PL_preambleav = NULL;
999 SvREFCNT_dec(PL_subname);
1001 #ifdef PERL_USES_PL_PIDSTATUS
1002 SvREFCNT_dec(PL_pidstatus);
1003 PL_pidstatus = NULL;
1005 SvREFCNT_dec(PL_toptarget);
1006 PL_toptarget = NULL;
1007 SvREFCNT_dec(PL_bodytarget);
1008 PL_bodytarget = NULL;
1009 PL_formtarget = NULL;
1011 /* free locale stuff */
1012 #ifdef USE_LOCALE_COLLATE
1013 Safefree(PL_collation_name);
1014 PL_collation_name = NULL;
1017 #ifdef USE_LOCALE_NUMERIC
1018 Safefree(PL_numeric_name);
1019 PL_numeric_name = NULL;
1020 SvREFCNT_dec(PL_numeric_radix_sv);
1021 PL_numeric_radix_sv = NULL;
1024 /* clear utf8 character classes */
1025 SvREFCNT_dec(PL_utf8_alnum);
1026 SvREFCNT_dec(PL_utf8_alnumc);
1027 SvREFCNT_dec(PL_utf8_ascii);
1028 SvREFCNT_dec(PL_utf8_alpha);
1029 SvREFCNT_dec(PL_utf8_space);
1030 SvREFCNT_dec(PL_utf8_cntrl);
1031 SvREFCNT_dec(PL_utf8_graph);
1032 SvREFCNT_dec(PL_utf8_digit);
1033 SvREFCNT_dec(PL_utf8_upper);
1034 SvREFCNT_dec(PL_utf8_lower);
1035 SvREFCNT_dec(PL_utf8_print);
1036 SvREFCNT_dec(PL_utf8_punct);
1037 SvREFCNT_dec(PL_utf8_xdigit);
1038 SvREFCNT_dec(PL_utf8_mark);
1039 SvREFCNT_dec(PL_utf8_toupper);
1040 SvREFCNT_dec(PL_utf8_totitle);
1041 SvREFCNT_dec(PL_utf8_tolower);
1042 SvREFCNT_dec(PL_utf8_tofold);
1043 SvREFCNT_dec(PL_utf8_idstart);
1044 SvREFCNT_dec(PL_utf8_idcont);
1045 PL_utf8_alnum = NULL;
1046 PL_utf8_alnumc = NULL;
1047 PL_utf8_ascii = NULL;
1048 PL_utf8_alpha = NULL;
1049 PL_utf8_space = NULL;
1050 PL_utf8_cntrl = NULL;
1051 PL_utf8_graph = NULL;
1052 PL_utf8_digit = NULL;
1053 PL_utf8_upper = NULL;
1054 PL_utf8_lower = NULL;
1055 PL_utf8_print = NULL;
1056 PL_utf8_punct = NULL;
1057 PL_utf8_xdigit = NULL;
1058 PL_utf8_mark = NULL;
1059 PL_utf8_toupper = NULL;
1060 PL_utf8_totitle = NULL;
1061 PL_utf8_tolower = NULL;
1062 PL_utf8_tofold = NULL;
1063 PL_utf8_idstart = NULL;
1064 PL_utf8_idcont = NULL;
1066 if (!specialWARN(PL_compiling.cop_warnings))
1067 PerlMemShared_free(PL_compiling.cop_warnings);
1068 PL_compiling.cop_warnings = NULL;
1069 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1070 PL_compiling.cop_hints_hash = NULL;
1071 CopFILE_free(&PL_compiling);
1072 CopSTASH_free(&PL_compiling);
1074 /* Prepare to destruct main symbol table. */
1079 SvREFCNT_dec(PL_curstname);
1080 PL_curstname = NULL;
1082 /* clear queued errors */
1083 SvREFCNT_dec(PL_errors);
1086 SvREFCNT_dec(PL_isarev);
1089 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1090 if (PL_scopestack_ix != 0)
1091 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1092 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1093 (long)PL_scopestack_ix);
1094 if (PL_savestack_ix != 0)
1095 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1096 "Unbalanced saves: %ld more saves than restores\n",
1097 (long)PL_savestack_ix);
1098 if (PL_tmps_floor != -1)
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1100 (long)PL_tmps_floor + 1);
1101 if (cxstack_ix != -1)
1102 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1103 (long)cxstack_ix + 1);
1106 /* Now absolutely destruct everything, somehow or other, loops or no. */
1107 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1108 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1110 /* the 2 is for PL_fdpid and PL_strtab */
1111 while (PL_sv_count > 2 && sv_clean_all())
1114 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1115 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1116 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1117 SvFLAGS(PL_strtab) |= SVt_PVHV;
1119 AvREAL_off(PL_fdpid); /* no surviving entries */
1120 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1123 #ifdef HAVE_INTERP_INTERN
1127 /* Destruct the global string table. */
1129 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1130 * so that sv_free() won't fail on them.
1131 * Now that the global string table is using a single hunk of memory
1132 * for both HE and HEK, we either need to explicitly unshare it the
1133 * correct way, or actually free things here.
1136 const I32 max = HvMAX(PL_strtab);
1137 HE * const * const array = HvARRAY(PL_strtab);
1138 HE *hent = array[0];
1141 if (hent && ckWARN_d(WARN_INTERNAL)) {
1142 HE * const next = HeNEXT(hent);
1143 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1144 "Unbalanced string table refcount: (%ld) for \"%s\"",
1145 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1152 hent = array[riter];
1157 HvARRAY(PL_strtab) = 0;
1158 HvTOTALKEYS(PL_strtab) = 0;
1159 HvFILL(PL_strtab) = 0;
1161 SvREFCNT_dec(PL_strtab);
1164 /* free the pointer tables used for cloning */
1165 ptr_table_free(PL_ptr_table);
1166 PL_ptr_table = (PTR_TBL_t*)NULL;
1169 /* free special SVs */
1171 SvREFCNT(&PL_sv_yes) = 0;
1172 sv_clear(&PL_sv_yes);
1173 SvANY(&PL_sv_yes) = NULL;
1174 SvFLAGS(&PL_sv_yes) = 0;
1176 SvREFCNT(&PL_sv_no) = 0;
1177 sv_clear(&PL_sv_no);
1178 SvANY(&PL_sv_no) = NULL;
1179 SvFLAGS(&PL_sv_no) = 0;
1183 for (i=0; i<=2; i++) {
1184 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1185 sv_clear(PERL_DEBUG_PAD(i));
1186 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1187 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1191 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1192 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1194 #ifdef DEBUG_LEAKING_SCALARS
1195 if (PL_sv_count != 0) {
1200 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1201 svend = &sva[SvREFCNT(sva)];
1202 for (sv = sva + 1; sv < svend; ++sv) {
1203 if (SvTYPE(sv) != SVTYPEMASK) {
1204 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1206 " refcnt=%"UVuf pTHX__FORMAT "\n"
1207 "\tallocated at %s:%d %s %s%s\n",
1208 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1210 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1212 sv->sv_debug_inpad ? "for" : "by",
1213 sv->sv_debug_optype ?
1214 PL_op_name[sv->sv_debug_optype]: "(none)",
1215 sv->sv_debug_cloned ? " (cloned)" : ""
1217 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1218 Perl_dump_sv_child(aTHX_ sv);
1224 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1228 /* Wait for up to 4 seconds for child to terminate.
1229 This seems to be the least effort way of timing out on reaping
1231 struct timeval waitfor = {4, 0};
1232 int sock = PL_dumper_fd;
1236 FD_SET(sock, &rset);
1237 select(sock + 1, &rset, NULL, NULL, &waitfor);
1238 waitpid(child, &status, WNOHANG);
1243 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1249 #ifdef PERL_DEBUG_READONLY_OPS
1255 #if defined(PERLIO_LAYERS)
1256 /* No more IO - including error messages ! */
1257 PerlIO_cleanup(aTHX);
1260 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1261 as currently layers use it rather than NULL as a marker
1262 for no arg - and will try and SvREFCNT_dec it.
1264 SvREFCNT(&PL_sv_undef) = 0;
1265 SvREADONLY_off(&PL_sv_undef);
1267 Safefree(PL_origfilename);
1268 PL_origfilename = NULL;
1269 Safefree(PL_reg_start_tmp);
1270 PL_reg_start_tmp = (char**)NULL;
1271 PL_reg_start_tmpl = 0;
1272 Safefree(PL_reg_curpm);
1273 Safefree(PL_reg_poscache);
1274 free_tied_hv_pool();
1275 Safefree(PL_op_mask);
1276 Safefree(PL_psig_ptr);
1277 PL_psig_ptr = (SV**)NULL;
1278 Safefree(PL_psig_name);
1279 PL_psig_name = (SV**)NULL;
1280 Safefree(PL_bitcount);
1282 Safefree(PL_psig_pend);
1283 PL_psig_pend = (int*)NULL;
1286 PL_tainting = FALSE;
1287 PL_taint_warn = FALSE;
1288 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1291 DEBUG_P(debprofdump());
1293 #ifdef USE_REENTRANT_API
1294 Perl_reentrant_free(aTHX);
1299 while (PL_regmatch_slab) {
1300 regmatch_slab *s = PL_regmatch_slab;
1301 PL_regmatch_slab = PL_regmatch_slab->next;
1305 /* As the absolutely last thing, free the non-arena SV for mess() */
1308 /* we know that type == SVt_PVMG */
1310 /* it could have accumulated taint magic */
1313 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1314 moremagic = mg->mg_moremagic;
1315 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1317 Safefree(mg->mg_ptr);
1321 /* we know that type >= SVt_PV */
1322 SvPV_free(PL_mess_sv);
1323 Safefree(SvANY(PL_mess_sv));
1324 Safefree(PL_mess_sv);
1331 =for apidoc perl_free
1333 Releases a Perl interpreter. See L<perlembed>.
1343 if (PL_veto_cleanup)
1346 #ifdef PERL_TRACK_MEMPOOL
1349 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1350 * value as we're probably hunting memory leaks then
1352 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1353 if (!s || atoi(s) == 0) {
1354 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1355 thread at thread exit. */
1356 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1357 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1362 #if defined(WIN32) || defined(NETWARE)
1363 # if defined(PERL_IMPLICIT_SYS)
1366 void *host = nw_internal_host;
1368 void *host = w32_internal_host;
1370 PerlMem_free(aTHXx);
1372 nw_delete_internal_host(host);
1374 win32_delete_internal_host(host);
1378 PerlMem_free(aTHXx);
1381 PerlMem_free(aTHXx);
1385 #if defined(USE_ITHREADS)
1386 /* provide destructors to clean up the thread key when libperl is unloaded */
1387 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1389 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1390 #pragma fini "perl_fini"
1391 #elif defined(__sun) && !defined(__GNUC__)
1392 #pragma fini (perl_fini)
1396 #if defined(__GNUC__)
1397 __attribute__((destructor))
1402 if (PL_curinterp && !PL_veto_cleanup)
1407 #endif /* THREADS */
1410 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1413 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1414 PL_exitlist[PL_exitlistlen].fn = fn;
1415 PL_exitlist[PL_exitlistlen].ptr = ptr;
1419 #ifdef HAS_PROCSELFEXE
1420 /* This is a function so that we don't hold on to MAXPATHLEN
1421 bytes of stack longer than necessary
1424 S_procself_val(pTHX_ SV *sv, const char *arg0)
1426 char buf[MAXPATHLEN];
1427 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1429 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1430 includes a spurious NUL which will cause $^X to fail in system
1431 or backticks (this will prevent extensions from being built and
1432 many tests from working). readlink is not meant to add a NUL.
1433 Normal readlink works fine.
1435 if (len > 0 && buf[len-1] == '\0') {
1439 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1440 returning the text "unknown" from the readlink rather than the path
1441 to the executable (or returning an error from the readlink). Any valid
1442 path has a '/' in it somewhere, so use that to validate the result.
1443 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1445 if (len > 0 && memchr(buf, '/', len)) {
1446 sv_setpvn(sv,buf,len);
1452 #endif /* HAS_PROCSELFEXE */
1455 S_set_caret_X(pTHX) {
1457 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1459 #ifdef HAS_PROCSELFEXE
1460 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1463 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1465 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1472 =for apidoc perl_parse
1474 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1480 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1487 PERL_UNUSED_ARG(my_perl);
1489 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1492 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1493 setuid perl scripts securely.\n");
1494 #endif /* IAMSUID */
1497 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1498 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1499 * This MUST be done before any hash stores or fetches take place.
1500 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1501 * yourself, it is your responsibility to provide a good random seed!
1502 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1503 if (!PL_rehash_seed_set)
1504 PL_rehash_seed = get_hash_seed();
1506 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1508 if (s && (atoi(s) == 1))
1509 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1511 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1516 if (PL_origalen != 0) {
1517 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1520 /* Set PL_origalen be the sum of the contiguous argv[]
1521 * elements plus the size of the env in case that it is
1522 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1523 * as the maximum modifiable length of $0. In the worst case
1524 * the area we are able to modify is limited to the size of
1525 * the original argv[0]. (See below for 'contiguous', though.)
1527 const char *s = NULL;
1530 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1531 /* Do the mask check only if the args seem like aligned. */
1533 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1535 /* See if all the arguments are contiguous in memory. Note
1536 * that 'contiguous' is a loose term because some platforms
1537 * align the argv[] and the envp[]. If the arguments look
1538 * like non-aligned, assume that they are 'strictly' or
1539 * 'traditionally' contiguous. If the arguments look like
1540 * aligned, we just check that they are within aligned
1541 * PTRSIZE bytes. As long as no system has something bizarre
1542 * like the argv[] interleaved with some other data, we are
1543 * fine. (Did I just evoke Murphy's Law?) --jhi */
1544 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1546 for (i = 1; i < PL_origargc; i++) {
1547 if ((PL_origargv[i] == s + 1
1549 || PL_origargv[i] == s + 2
1554 (PL_origargv[i] > s &&
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1567 #ifndef PERL_USE_SAFE_PUTENV
1568 /* Can we grab env area too to be used as the area for $0? */
1569 if (s && PL_origenviron && !PL_use_safe_putenv) {
1570 if ((PL_origenviron[0] == s + 1)
1573 (PL_origenviron[0] > s &&
1574 PL_origenviron[0] <=
1575 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1578 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1579 s = PL_origenviron[0];
1582 my_setenv("NoNe SuCh", NULL);
1583 /* Force copy of environment. */
1584 for (i = 1; PL_origenviron[i]; i++) {
1585 if (PL_origenviron[i] == s + 1
1588 (PL_origenviron[i] > s &&
1589 PL_origenviron[i] <=
1590 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1593 s = PL_origenviron[i];
1601 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1603 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1608 /* Come here if running an undumped a.out. */
1610 PL_origfilename = savepv(argv[0]);
1611 PL_do_undump = FALSE;
1612 cxstack_ix = -1; /* start label stack again */
1614 assert (!PL_tainted);
1616 S_set_caret_X(aTHX);
1618 init_postdump_symbols(argc,argv,env);
1623 op_free(PL_main_root);
1624 PL_main_root = NULL;
1626 PL_main_start = NULL;
1627 SvREFCNT_dec(PL_main_cv);
1631 oldscope = PL_scopestack_ix;
1632 PL_dowarn = G_WARN_OFF;
1637 parse_body(env,xsinit);
1639 call_list(oldscope, PL_unitcheckav);
1641 call_list(oldscope, PL_checkav);
1648 /* my_exit() was called */
1649 while (PL_scopestack_ix > oldscope)
1652 PL_curstash = PL_defstash;
1654 call_list(oldscope, PL_unitcheckav);
1656 call_list(oldscope, PL_checkav);
1660 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1669 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1673 int argc = PL_origargc;
1674 char **argv = PL_origargv;
1675 const char *scriptname = NULL;
1676 VOL bool dosearch = FALSE;
1677 const char *validarg = "";
1680 const char *cddir = NULL;
1681 #ifdef USE_SITECUSTOMIZE
1682 bool minus_f = FALSE;
1684 SV *linestr_sv = newSV_type(SVt_PVIV);
1685 bool add_read_e_script = FALSE;
1687 SvGROW(linestr_sv, 80);
1688 sv_setpvn(linestr_sv,"",0);
1690 sv = newSVpvs(""); /* first used for -I flags */
1696 for (argc--,argv++; argc > 0; argc--,argv++) {
1697 if (argv[0][0] != '-' || !argv[0][1])
1701 validarg = " PHOOEY ";
1705 * Can we rely on the kernel to start scripts with argv[1] set to
1706 * contain all #! line switches (the whole line)? (argv[0] is set to
1707 * the interpreter name, argv[2] to the script name; argv[3] and
1708 * above may contain other arguments.)
1715 #ifndef PERL_STRICT_CR
1739 if ((s = moreswitches(s)))
1744 CHECK_MALLOC_TOO_LATE_FOR('t');
1745 if( !PL_tainting ) {
1746 PL_taint_warn = TRUE;
1752 CHECK_MALLOC_TOO_LATE_FOR('T');
1754 PL_taint_warn = FALSE;
1762 #ifdef MACOS_TRADITIONAL
1763 /* ignore -e for Dev:Pseudo argument */
1764 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1767 forbid_setid('e', -1);
1769 PL_e_script = newSVpvs("");
1770 add_read_e_script = TRUE;
1773 sv_catpv(PL_e_script, s);
1775 sv_catpv(PL_e_script, argv[1]);
1779 Perl_croak(aTHX_ "No code specified for -%c", c);
1780 sv_catpvs(PL_e_script, "\n");
1784 #ifdef USE_SITECUSTOMIZE
1790 case 'I': /* -I handled both here and in moreswitches() */
1791 forbid_setid('I', -1);
1792 if (!*++s && (s=argv[1]) != NULL) {
1796 STRLEN len = strlen(s);
1797 const char * const p = savepvn(s, len);
1798 incpush(p, TRUE, TRUE, FALSE, FALSE);
1799 sv_catpvs(sv, "-I");
1800 sv_catpvn(sv, p, len);
1805 Perl_croak(aTHX_ "No directory specified for -I");
1808 forbid_setid('S', -1);
1816 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1818 /* Can't do newSVpvs() as that would involve pre-processor
1819 condititionals inside a macro expansion. */
1820 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1827 # ifdef PERL_DONT_CREATE_GVSV
1828 " PERL_DONT_CREATE_GVSV"
1830 # ifdef PERL_MALLOC_WRAP
1833 # ifdef PERL_MEM_LOG
1836 # ifdef PERL_MEM_LOG_ENV
1839 # ifdef PERL_MEM_LOG_ENV_FD
1840 " PERL_MEM_LOG_ENV_FD"
1842 # ifdef PERL_MEM_LOG_STDERR
1843 " PERL_MEM_LOG_STDERR"
1845 # ifdef PERL_MEM_LOG_TIMESTAMP
1846 " PERL_MEM_LOG_TIMESTAMP"
1848 # ifdef PERL_USE_SAFE_PUTENV
1849 " PERL_USE_SAFE_PUTENV"
1851 # ifdef USE_SITECUSTOMIZE
1852 " USE_SITECUSTOMIZE"
1856 sv_catpv(opts_prog, PL_bincompat_options);
1857 /* Terminate the qw(, and then wrap at 76 columns. */
1858 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1860 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1862 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1865 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1867 #if defined(LOCAL_PATCH_COUNT)
1868 if (LOCAL_PATCH_COUNT > 0) {
1870 sv_catpvs(opts_prog,
1871 "\" Locally applied patches:\\n\",");
1872 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1873 if (PL_localpatches[i])
1874 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1875 0, PL_localpatches[i], 0);
1879 Perl_sv_catpvf(aTHX_ opts_prog,
1880 "\" Built under %s\\n",OSNAME);
1883 sv_catpvs(opts_prog,
1884 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1886 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1889 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1890 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1891 "sort grep {/^PERL/} keys %ENV; ");
1893 sv_catpvs(opts_prog,
1894 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1896 sv_catpvs(opts_prog,
1897 "print \" \\%ENV:\\n @env\\n\" if @env;"
1898 "print \" \\@INC:\\n @INC\\n\";");
1902 opts_prog = Perl_newSVpvf(aTHX_
1903 "Config::config_vars(qw%c%s%c)",
1907 av_push(PL_preambleav, opts_prog);
1908 /* don't look for script or read stdin */
1909 scriptname = BIT_BUCKET;
1913 PL_doextract = TRUE;
1921 if (!*++s || isSPACE(*s)) {
1925 /* catch use of gnu style long options */
1926 if (strEQ(s, "version")) {
1930 if (strEQ(s, "help")) {
1937 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1948 #ifndef SECURE_INTERNAL_GETENV
1951 (s = PerlEnv_getenv("PERL5OPT")))
1953 const char *popt = s;
1956 if (*s == '-' && *(s+1) == 'T') {
1957 CHECK_MALLOC_TOO_LATE_FOR('T');
1959 PL_taint_warn = FALSE;
1962 char *popt_copy = NULL;
1975 if (!strchr("CDIMUdmtw", *s))
1976 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1980 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1981 s = popt_copy + (s - popt);
1982 d = popt_copy + (d - popt);
1989 if( !PL_tainting ) {
1990 PL_taint_warn = TRUE;
2001 #ifdef USE_SITECUSTOMIZE
2003 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2004 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2009 scriptname = argv[0];
2012 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2014 else if (scriptname == NULL) {
2016 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2022 /* Set $^X early so that it can be used for relocatable paths in @INC */
2023 assert (!PL_tainted);
2025 S_set_caret_X(aTHX);
2032 = open_script(scriptname, dosearch, &suidscript, &rsfp);
2034 validate_suid(validarg, scriptname, fdscript, suidscript,
2038 # if defined(SIGCHLD) || defined(SIGCLD)
2041 # define SIGCHLD SIGCLD
2043 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2044 if (sigstate == (Sighandler_t) SIG_IGN) {
2045 if (ckWARN(WARN_SIGNAL))
2046 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2047 "Can't ignore signal CHLD, forcing to default");
2048 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2055 #ifdef MACOS_TRADITIONAL
2056 || gMacPerl_AlwaysExtract
2060 /* This will croak if suidscript is >= 0, as -x cannot be used with
2062 forbid_setid('x', suidscript);
2063 /* Hence you can't get here if suidscript >= 0 */
2065 find_beginning(linestr_sv, rsfp);
2066 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2067 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2071 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2072 CvUNIQUE_on(PL_compcv);
2074 CvPADLIST(PL_compcv) = pad_new(0);
2076 PL_isarev = newHV();
2079 boot_core_UNIVERSAL();
2080 boot_core_xsutils();
2084 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2086 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2092 # ifdef HAS_SOCKS5_INIT
2093 socks5_init(argv[0]);
2099 init_predump_symbols();
2100 /* init_postdump_symbols not currently designed to be called */
2101 /* more than once (ENV isn't cleared first, for example) */
2102 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2104 init_postdump_symbols(argc,argv,env);
2106 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2107 * or explicitly in some platforms.
2108 * locale.c:Perl_init_i18nl10n() if the environment
2109 * look like the user wants to use UTF-8. */
2110 #if defined(__SYMBIAN32__)
2111 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2114 /* Requires init_predump_symbols(). */
2115 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2120 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2121 * and the default open disciplines. */
2122 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2123 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2125 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2126 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2127 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2129 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2130 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2131 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2133 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2134 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2135 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2137 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2138 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2141 sv_setpvn(sv, ":utf8\0:utf8", 11);
2143 sv_setpvn(sv, ":utf8\0", 6);
2146 sv_setpvn(sv, "\0:utf8", 6);
2154 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2155 if (strEQ(s, "unsafe"))
2156 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2157 else if (strEQ(s, "safe"))
2158 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2160 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2167 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2171 PL_xmlfp = PerlIO_stdout();
2173 PL_xmlfp = PerlIO_open(s, "w");
2175 Perl_croak(aTHX_ "Can't open %s", s);
2177 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2183 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2184 PL_madskills = atoi(s);
2185 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2190 lex_start(linestr_sv, rsfp, TRUE);
2191 PL_subname = newSVpvs("main");
2193 if (add_read_e_script)
2194 filter_add(read_e_script, NULL);
2196 /* now parse the script */
2198 SETERRNO(0,SS_NORMAL);
2199 #ifdef MACOS_TRADITIONAL
2200 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2202 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2204 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2205 MacPerl_MPWFileName(PL_origfilename));
2209 if (yyparse() || PL_parser->error_count) {
2211 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2213 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2218 CopLINE_set(PL_curcop, 0);
2219 PL_curstash = PL_defstash;
2221 SvREFCNT_dec(PL_e_script);
2229 SAVECOPFILE(PL_curcop);
2230 SAVECOPLINE(PL_curcop);
2231 gv_check(PL_defstash);
2240 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2241 dump_mstats("after compilation:");
2251 =for apidoc perl_run
2253 Tells a Perl interpreter to run. See L<perlembed>.
2266 PERL_UNUSED_ARG(my_perl);
2268 oldscope = PL_scopestack_ix;
2276 cxstack_ix = -1; /* start context stack again */
2278 case 0: /* normal completion */
2282 case 2: /* my_exit() */
2283 while (PL_scopestack_ix > oldscope)
2286 PL_curstash = PL_defstash;
2287 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2288 PL_endav && !PL_minus_c)
2289 call_list(oldscope, PL_endav);
2291 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2292 dump_mstats("after execution: ");
2298 POPSTACK_TO(PL_mainstack);
2301 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2312 S_run_body(pTHX_ I32 oldscope)
2315 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2316 PL_sawampersand ? "Enabling" : "Omitting"));
2318 if (!PL_restartop) {
2322 exit(0); /* less likely to core dump than my_exit(0) */
2325 DEBUG_x(dump_all());
2328 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2330 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2334 #ifdef MACOS_TRADITIONAL
2335 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2336 (gMacPerl_ErrorFormat ? "# " : ""),
2337 MacPerl_MPWFileName(PL_origfilename));
2339 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2343 if (PERLDB_SINGLE && PL_DBsingle)
2344 sv_setiv(PL_DBsingle, 1);
2346 call_list(oldscope, PL_initav);
2347 #ifdef PERL_DEBUG_READONLY_OPS
2348 Perl_pending_Slabs_to_ro(aTHX);
2355 PL_op = PL_restartop;
2359 else if (PL_main_start) {
2360 CvDEPTH(PL_main_cv) = 1;
2361 PL_op = PL_main_start;
2369 =head1 SV Manipulation Functions
2371 =for apidoc p||get_sv
2373 Returns the SV of the specified Perl scalar. If C<create> is set and the
2374 Perl variable does not exist then it will be created. If C<create> is not
2375 set and the variable does not exist then NULL is returned.
2381 Perl_get_sv(pTHX_ const char *name, I32 create)
2384 gv = gv_fetchpv(name, create, SVt_PV);
2391 =head1 Array Manipulation Functions
2393 =for apidoc p||get_av
2395 Returns the AV of the specified Perl array. If C<create> is set and the
2396 Perl variable does not exist then it will be created. If C<create> is not
2397 set and the variable does not exist then NULL is returned.
2403 Perl_get_av(pTHX_ const char *name, I32 create)
2405 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2414 =head1 Hash Manipulation Functions
2416 =for apidoc p||get_hv
2418 Returns the HV of the specified Perl hash. If C<create> is set and the
2419 Perl variable does not exist then it will be created. If C<create> is not
2420 set and the variable does not exist then NULL is returned.
2426 Perl_get_hv(pTHX_ const char *name, I32 create)
2428 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2437 =head1 CV Manipulation Functions
2439 =for apidoc p||get_cvn_flags
2441 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2442 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2443 exist then it will be declared (which has the same effect as saying
2444 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2445 then NULL is returned.
2447 =for apidoc p||get_cv
2449 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2455 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2457 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2458 /* XXX this is probably not what they think they're getting.
2459 * It has the same effect as "sub name;", i.e. just a forward
2461 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2462 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2463 return newSUB(start_subparse(FALSE, 0),
2464 newSVOP(OP_CONST, 0, sv),
2473 Perl_get_cv(pTHX_ const char *name, I32 flags)
2475 return get_cvn_flags(name, strlen(name), flags);
2478 /* Be sure to refetch the stack pointer after calling these routines. */
2482 =head1 Callback Functions
2484 =for apidoc p||call_argv
2486 Performs a callback to the specified Perl sub. See L<perlcall>.
2492 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2494 /* See G_* flags in cop.h */
2495 /* null terminated arg list */
2503 mXPUSHs(newSVpv(*argv,0));
2508 return call_pv(sub_name, flags);
2512 =for apidoc p||call_pv
2514 Performs a callback to the specified Perl sub. See L<perlcall>.
2520 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2521 /* name of the subroutine */
2522 /* See G_* flags in cop.h */
2524 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2528 =for apidoc p||call_method
2530 Performs a callback to the specified Perl method. The blessed object must
2531 be on the stack. See L<perlcall>.
2537 Perl_call_method(pTHX_ const char *methname, I32 flags)
2538 /* name of the subroutine */
2539 /* See G_* flags in cop.h */
2541 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2544 /* May be called with any of a CV, a GV, or an SV containing the name. */
2546 =for apidoc p||call_sv
2548 Performs a callback to the Perl sub whose name is in the SV. See
2555 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2556 /* See G_* flags in cop.h */
2559 LOGOP myop; /* fake syntax tree node */
2564 bool oldcatch = CATCH_GET;
2566 OP* const oldop = PL_op;
2569 if (flags & G_DISCARD) {
2574 Zero(&myop, 1, LOGOP);
2575 myop.op_next = NULL;
2576 if (!(flags & G_NOARGS))
2577 myop.op_flags |= OPf_STACKED;
2578 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2579 (flags & G_ARRAY) ? OPf_WANT_LIST :
2584 EXTEND(PL_stack_sp, 1);
2585 *++PL_stack_sp = sv;
2587 oldscope = PL_scopestack_ix;
2589 if (PERLDB_SUB && PL_curstash != PL_debstash
2590 /* Handle first BEGIN of -d. */
2591 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2592 /* Try harder, since this may have been a sighandler, thus
2593 * curstash may be meaningless. */
2594 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2595 && !(flags & G_NODEBUG))
2596 PL_op->op_private |= OPpENTERSUB_DB;
2598 if (flags & G_METHOD) {
2599 Zero(&method_op, 1, UNOP);
2600 method_op.op_next = PL_op;
2601 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2602 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2603 PL_op = (OP*)&method_op;
2606 if (!(flags & G_EVAL)) {
2608 CALL_BODY_SUB((OP*)&myop);
2609 retval = PL_stack_sp - (PL_stack_base + oldmark);
2610 CATCH_SET(oldcatch);
2613 myop.op_other = (OP*)&myop;
2615 create_eval_scope(flags|G_FAKINGEVAL);
2623 CALL_BODY_SUB((OP*)&myop);
2624 retval = PL_stack_sp - (PL_stack_base + oldmark);
2625 if (!(flags & G_KEEPERR))
2626 sv_setpvn(ERRSV,"",0);
2632 /* my_exit() was called */
2633 PL_curstash = PL_defstash;
2636 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2637 Perl_croak(aTHX_ "Callback called exit");
2642 PL_op = PL_restartop;
2646 PL_stack_sp = PL_stack_base + oldmark;
2647 if (flags & G_ARRAY)
2651 *++PL_stack_sp = &PL_sv_undef;
2656 if (PL_scopestack_ix > oldscope)
2657 delete_eval_scope();
2661 if (flags & G_DISCARD) {
2662 PL_stack_sp = PL_stack_base + oldmark;
2671 /* Eval a string. The G_EVAL flag is always assumed. */
2674 =for apidoc p||eval_sv
2676 Tells Perl to C<eval> the string in the SV.
2682 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2684 /* See G_* flags in cop.h */
2688 UNOP myop; /* fake syntax tree node */
2689 VOL I32 oldmark = SP - PL_stack_base;
2692 OP* const oldop = PL_op;
2695 if (flags & G_DISCARD) {
2702 Zero(PL_op, 1, UNOP);
2703 EXTEND(PL_stack_sp, 1);
2704 *++PL_stack_sp = sv;
2706 if (!(flags & G_NOARGS))
2707 myop.op_flags = OPf_STACKED;
2708 myop.op_next = NULL;
2709 myop.op_type = OP_ENTEREVAL;
2710 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2711 (flags & G_ARRAY) ? OPf_WANT_LIST :
2713 if (flags & G_KEEPERR)
2714 myop.op_flags |= OPf_SPECIAL;
2716 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2717 * before a PUSHEVAL, which corrupts the stack after a croak */
2718 TAINT_PROPER("eval_sv()");
2724 CALL_BODY_EVAL((OP*)&myop);
2725 retval = PL_stack_sp - (PL_stack_base + oldmark);
2726 if (!(flags & G_KEEPERR))
2727 sv_setpvn(ERRSV,"",0);
2733 /* my_exit() was called */
2734 PL_curstash = PL_defstash;
2737 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2738 Perl_croak(aTHX_ "Callback called exit");
2743 PL_op = PL_restartop;
2747 PL_stack_sp = PL_stack_base + oldmark;
2748 if (flags & G_ARRAY)
2752 *++PL_stack_sp = &PL_sv_undef;
2758 if (flags & G_DISCARD) {
2759 PL_stack_sp = PL_stack_base + oldmark;
2769 =for apidoc p||eval_pv
2771 Tells Perl to C<eval> the given string and return an SV* result.
2777 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2781 SV* sv = newSVpv(p, 0);
2783 eval_sv(sv, G_SCALAR);
2790 if (croak_on_error && SvTRUE(ERRSV)) {
2791 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2797 /* Require a module. */
2800 =head1 Embedding Functions
2802 =for apidoc p||require_pv
2804 Tells Perl to C<require> the file named by the string argument. It is
2805 analogous to the Perl code C<eval "require '$file'">. It's even
2806 implemented that way; consider using load_module instead.
2811 Perl_require_pv(pTHX_ const char *pv)
2816 PUSHSTACKi(PERLSI_REQUIRE);
2818 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2819 eval_sv(sv_2mortal(sv), G_DISCARD);
2825 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2827 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2830 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2834 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2836 /* This message really ought to be max 23 lines.
2837 * Removed -h because the user already knows that option. Others? */
2839 static const char * const usage_msg[] = {
2840 "-0[octal] specify record separator (\\0, if no argument)",
2841 "-a autosplit mode with -n or -p (splits $_ into @F)",
2842 "-C[number/list] enables the listed Unicode features",
2843 "-c check syntax only (runs BEGIN and CHECK blocks)",
2844 "-d[:debugger] run program under debugger",
2845 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2846 "-e program one line of program (several -e's allowed, omit programfile)",
2847 "-E program like -e, but enables all optional features",
2848 "-f don't do $sitelib/sitecustomize.pl at startup",
2849 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2850 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2851 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2852 "-l[octal] enable line ending processing, specifies line terminator",
2853 "-[mM][-]module execute \"use/no module...\" before executing program",
2854 "-n assume \"while (<>) { ... }\" loop around program",
2855 "-p assume loop like -n but print line also, like sed",
2856 "-s enable rudimentary parsing for switches after programfile",
2857 "-S look for programfile using PATH environment variable",
2858 "-t enable tainting warnings",
2859 "-T enable tainting checks",
2860 "-u dump core after parsing program",
2861 "-U allow unsafe operations",
2862 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2863 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2864 "-w enable many useful warnings (RECOMMENDED)",
2865 "-W enable all warnings",
2866 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2867 "-X disable all warnings",
2871 const char * const *p = usage_msg;
2873 PerlIO_printf(PerlIO_stdout(),
2874 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2877 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2880 /* convert a string of -D options (or digits) into an int.
2881 * sets *s to point to the char after the options */
2885 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2887 static const char * const usage_msgd[] = {
2888 " Debugging flag values: (see also -d)",
2889 " p Tokenizing and parsing (with v, displays parse stack)",
2890 " s Stack snapshots (with v, displays all stacks)",
2891 " l Context (loop) stack processing",
2892 " t Trace execution",
2893 " o Method and overloading resolution",
2894 " c String/numeric conversions",
2895 " P Print profiling info, source file input state",
2896 " m Memory allocation",
2897 " f Format processing",
2898 " r Regular expression parsing and execution",
2899 " x Syntax tree dump",
2900 " u Tainting checks",
2901 " H Hash dump -- usurps values()",
2902 " X Scratchpad allocation",
2904 " S Thread synchronization",
2906 " R Include reference counts of dumped variables (eg when using -Ds)",
2907 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2908 " v Verbose: use in conjunction with other flags",
2910 " A Consistency checks on internal structures",
2911 " q quiet - currently only suppresses the 'EXECUTING' message",
2916 /* if adding extra options, remember to update DEBUG_MASK */
2917 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2919 for (; isALNUM(**s); (*s)++) {
2920 const char * const d = strchr(debopts,**s);
2922 i |= 1 << (d - debopts);
2923 else if (ckWARN_d(WARN_DEBUGGING))
2924 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2925 "invalid option -D%c, use -D'' to see choices\n", **s);
2928 else if (isDIGIT(**s)) {
2930 for (; isALNUM(**s); (*s)++) ;
2932 else if (givehelp) {
2933 const char *const *p = usage_msgd;
2934 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2937 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2938 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2939 "-Dp not implemented on this platform\n");
2945 /* This routine handles any switches that can be given during run */
2948 Perl_moreswitches(pTHX_ const char *s)
2959 SvREFCNT_dec(PL_rs);
2960 if (s[1] == 'x' && s[2]) {
2961 const char *e = s+=2;
2967 flags = PERL_SCAN_SILENT_ILLDIGIT;
2968 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2969 if (s + numlen < e) {
2970 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2974 PL_rs = newSVpvs("");
2975 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2976 tmps = (U8*)SvPVX(PL_rs);
2977 uvchr_to_utf8(tmps, rschar);
2978 SvCUR_set(PL_rs, UNISKIP(rschar));
2983 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2984 if (rschar & ~((U8)~0))
2985 PL_rs = &PL_sv_undef;
2986 else if (!rschar && numlen >= 2)
2987 PL_rs = newSVpvs("");
2989 char ch = (char)rschar;
2990 PL_rs = newSVpvn(&ch, 1);
2993 sv_setsv(get_sv("/", TRUE), PL_rs);
2998 PL_unicode = parse_unicode_opts( (const char **)&s );
2999 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3005 while (*s && !isSPACE(*s)) ++s;
3006 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3017 forbid_setid('d', -1);
3020 /* -dt indicates to the debugger that threads will be used */
3021 if (*s == 't' && !isALNUM(s[1])) {
3023 my_setenv("PERL5DB_THREADED", "1");
3026 /* The following permits -d:Mod to accepts arguments following an =
3027 in the fashion that -MSome::Mod does. */
3028 if (*s == ':' || *s == '=') {
3029 const char *start = ++s;
3030 const char *const end = s + strlen(s);
3031 SV * const sv = newSVpvs("use Devel::");
3033 /* We now allow -d:Module=Foo,Bar */
3034 while(isALNUM(*s) || *s==':') ++s;
3036 sv_catpvn(sv, start, end - start);
3038 sv_catpvn(sv, start, s-start);
3039 /* Don't use NUL as q// delimiter here, this string goes in the
3041 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3044 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3048 PL_perldb = PERLDB_ALL;
3055 forbid_setid('D', -1);
3057 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3058 #else /* !DEBUGGING */
3059 if (ckWARN_d(WARN_DEBUGGING))
3060 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3061 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3062 for (s++; isALNUM(*s); s++) ;
3067 usage(PL_origargv[0]);
3070 Safefree(PL_inplace);
3071 #if defined(__CYGWIN__) /* do backup extension automagically */
3072 if (*(s+1) == '\0') {
3073 PL_inplace = savepvs(".bak");
3076 #endif /* __CYGWIN__ */
3078 const char * const start = ++s;
3079 while (*s && !isSPACE(*s))
3082 PL_inplace = savepvn(start, s - start);
3086 if (*s == '-') /* Additional switches on #! line. */
3090 case 'I': /* -I handled both here and in parse_body() */
3091 forbid_setid('I', -1);
3093 while (*s && isSPACE(*s))
3098 /* ignore trailing spaces (possibly followed by other switches) */
3100 for (e = p; *e && !isSPACE(*e); e++) ;
3104 } while (*p && *p != '-');
3105 e = savepvn(s, e-s);
3106 incpush(e, TRUE, TRUE, FALSE, FALSE);
3113 Perl_croak(aTHX_ "No directory specified for -I");
3119 SvREFCNT_dec(PL_ors_sv);
3125 PL_ors_sv = newSVpvs("\n");
3126 numlen = 3 + (*s == '0');
3127 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3131 if (RsPARA(PL_rs)) {
3132 PL_ors_sv = newSVpvs("\n\n");
3135 PL_ors_sv = newSVsv(PL_rs);
3140 forbid_setid('M', -1); /* XXX ? */
3143 forbid_setid('m', -1); /* XXX ? */
3148 const char *use = "use ";
3149 /* -M-foo == 'no foo' */
3150 /* Leading space on " no " is deliberate, to make both
3151 possibilities the same length. */
3152 if (*s == '-') { use = " no "; ++s; }
3153 sv = newSVpvn(use,4);
3155 /* We allow -M'Module qw(Foo Bar)' */
3156 while(isALNUM(*s) || *s==':') ++s;
3157 end = s + strlen(s);
3159 sv_catpvn(sv, start, end - start);
3160 if (*(start-1) == 'm') {
3162 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3163 sv_catpvs( sv, " ()");
3167 Perl_croak(aTHX_ "Module name required with -%c option",
3169 sv_catpvn(sv, start, s-start);
3170 /* Use NUL as q''-delimiter. */
3171 sv_catpvs(sv, " split(/,/,q\0");
3173 sv_catpvn(sv, s, end - s);
3174 sv_catpvs(sv, "\0)");
3177 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3180 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3191 forbid_setid('s', -1);
3192 PL_doswitches = TRUE;
3206 #ifdef MACOS_TRADITIONAL
3207 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3209 PL_do_undump = TRUE;
3217 if (!sv_derived_from(PL_patchlevel, "version"))
3218 upg_version(PL_patchlevel, TRUE);
3220 PerlIO_printf(PerlIO_stdout(),
3221 Perl_form(aTHX_ "\nThis is perl, %"SVf
3222 #ifdef PERL_PATCHNUM
3223 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3226 SVfARG(vstringify(PL_patchlevel)),
3229 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3230 PerlIO_printf(PerlIO_stdout(),
3231 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3232 SVfARG(vstringify(PL_patchlevel))));
3233 PerlIO_printf(PerlIO_stdout(),
3234 Perl_form(aTHX_ " built under %s at %s %s\n",
3235 OSNAME, __DATE__, __TIME__));
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ " OS Specific Release: %s\n",
3241 #if defined(LOCAL_PATCH_COUNT)
3242 if (LOCAL_PATCH_COUNT > 0)
3243 PerlIO_printf(PerlIO_stdout(),
3244 "\n(with %d registered patch%s, "
3245 "see perl -V for more detail)",
3247 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3250 PerlIO_printf(PerlIO_stdout(),
3251 "\n\nCopyright 1987-2007, Larry Wall\n");
3252 #ifdef MACOS_TRADITIONAL
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3255 "maintained by Chris Nandor\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3264 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3269 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "atariST series port, ++jrb bammi@cadence.com\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "MiNT port by Guido Flohr, 1997-1999\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "EPOC port by Olaf Flebbe, 1999-2002\n");
3308 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3309 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3312 #ifdef __SYMBIAN32__
3313 PerlIO_printf(PerlIO_stdout(),
3314 "Symbian port by Nokia, 2004-2005\n");
3316 #ifdef BINARY_BUILD_NOTICE
3317 BINARY_BUILD_NOTICE;
3319 PerlIO_printf(PerlIO_stdout(),
3321 Perl may be copied only under the terms of either the Artistic License or the\n\
3322 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3323 Complete documentation for Perl, including FAQ lists, should be found on\n\
3324 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3325 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3328 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3329 PL_dowarn |= G_WARN_ON;
3334 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3335 if (!specialWARN(PL_compiling.cop_warnings))
3336 PerlMemShared_free(PL_compiling.cop_warnings);
3337 PL_compiling.cop_warnings = pWARN_ALL ;
3341 PL_dowarn = G_WARN_ALL_OFF;
3342 if (!specialWARN(PL_compiling.cop_warnings))
3343 PerlMemShared_free(PL_compiling.cop_warnings);
3344 PL_compiling.cop_warnings = pWARN_NONE ;
3349 if (s[1] == '-') /* Additional switches on #! line. */
3354 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3360 #ifdef ALTERNATE_SHEBANG
3361 case 'S': /* OS/2 needs -S on "extproc" line. */
3365 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3370 /* compliments of Tom Christiansen */
3372 /* unexec() can be found in the Gnu emacs distribution */
3373 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3376 Perl_my_unexec(pTHX)
3378 PERL_UNUSED_CONTEXT;
3380 SV * prog = newSVpv(BIN_EXP, 0);
3381 SV * file = newSVpv(PL_origfilename, 0);
3385 sv_catpvs(prog, "/perl");
3386 sv_catpvs(file, ".perldump");
3388 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3389 /* unexec prints msg to stderr in case of failure */
3390 PerlProc_exit(status);
3393 # include <lib$routines.h>
3394 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3395 # elif defined(WIN32) || defined(__CYGWIN__)
3396 Perl_croak(aTHX_ "dump is not supported");
3398 ABORT(); /* for use with undump */
3403 /* initialize curinterp */
3409 # define PERLVAR(var,type)
3410 # define PERLVARA(var,n,type)
3411 # if defined(PERL_IMPLICIT_CONTEXT)
3412 # define PERLVARI(var,type,init) aTHX->var = init;
3413 # define PERLVARIC(var,type,init) aTHX->var = init;
3415 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3416 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3418 # include "intrpvar.h"
3424 # define PERLVAR(var,type)
3425 # define PERLVARA(var,n,type)
3426 # define PERLVARI(var,type,init) PL_##var = init;
3427 # define PERLVARIC(var,type,init) PL_##var = init;
3428 # include "intrpvar.h"
3435 /* As these are inside a structure, PERLVARI isn't capable of initialising
3437 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3438 PL_reg_poscache = PL_reg_starttry = NULL;
3442 S_init_main_stash(pTHX)
3447 PL_curstash = PL_defstash = newHV();
3448 /* We know that the string "main" will be in the global shared string
3449 table, so it's a small saving to use it rather than allocate another
3451 PL_curstname = newSVpvs_share("main");
3452 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3453 /* If we hadn't caused another reference to "main" to be in the shared
3454 string table above, then it would be worth reordering these two,
3455 because otherwise all we do is delete "main" from it as a consequence
3456 of the SvREFCNT_dec, only to add it again with hv_name_set */
3457 SvREFCNT_dec(GvHV(gv));
3458 hv_name_set(PL_defstash, "main", 4, 0);
3459 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3461 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3463 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3464 GvMULTI_on(PL_incgv);
3465 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3466 GvMULTI_on(PL_hintgv);
3467 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3468 SvREFCNT_inc_simple_void(PL_defgv);
3469 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3470 SvREFCNT_inc_simple_void(PL_errgv);
3471 GvMULTI_on(PL_errgv);
3472 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3473 GvMULTI_on(PL_replgv);
3474 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3475 #ifdef PERL_DONT_CREATE_GVSV
3478 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3479 sv_setpvn(ERRSV, "", 0);
3480 PL_curstash = PL_defstash;
3481 CopSTASH_set(&PL_compiling, PL_defstash);
3482 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3483 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3485 /* We must init $/ before switches are processed. */
3486 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3490 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3491 int *suidscript, PerlIO **rsfpp)
3499 PL_origfilename = savepvs("-e");
3502 /* if find_script() returns, it returns a malloc()-ed value */
3503 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3505 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3506 const char *s = scriptname + 8;
3512 * Tell apart "normal" usage of fdscript, e.g.
3513 * with bash on FreeBSD:
3514 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3515 * from usage in suidperl.
3516 * Does any "normal" usage leave garbage after the number???
3517 * Is it a mistake to use a similar /dev/fd/ construct for
3522 * Be supersafe and do some sanity-checks.
3523 * Still, can we be sure we got the right thing?
3526 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3529 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3531 scriptname = savepv(s + 1);
3532 Safefree(PL_origfilename);
3533 PL_origfilename = (char *)scriptname;
3538 CopFILE_free(PL_curcop);
3539 CopFILE_set(PL_curcop, PL_origfilename);
3540 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3541 scriptname = (char *)"";
3542 if (fdscript >= 0) {
3543 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3544 # if defined(HAS_FCNTL) && defined(F_SETFD)
3546 /* ensure close-on-exec */
3547 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3552 Perl_croak(aTHX_ "sperl needs fd script\n"
3553 "You should not call sperl directly; do you need to "
3554 "change a #! line\nfrom sperl to perl?\n");
3557 * Do not open (or do other fancy stuff) while setuid.
3558 * Perl does the open, and hands script to suidperl on a fd;
3559 * suidperl only does some checks, sets up UIDs and re-execs
3560 * perl with that fd as it has always done.
3563 if (*suidscript != 1) {
3564 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3567 else if (!*scriptname) {
3568 forbid_setid(0, *suidscript);
3569 *rsfpp = PerlIO_stdin();
3572 #ifdef FAKE_BIT_BUCKET
3573 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3574 * is called) and still have the "-e" work. (Believe it or not,
3575 * a /dev/null is required for the "-e" to work because source
3576 * filter magic is used to implement it. ) This is *not* a general
3577 * replacement for a /dev/null. What we do here is create a temp
3578 * file (an empty file), open up that as the script, and then
3579 * immediately close and unlink it. Close enough for jazz. */
3580 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3581 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3582 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3583 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3584 FAKE_BIT_BUCKET_TEMPLATE
3586 const char * const err = "Failed to create a fake bit bucket";
3587 if (strEQ(scriptname, BIT_BUCKET)) {
3588 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3589 int tmpfd = mkstemp(tmpname);
3591 scriptname = tmpname;
3594 Perl_croak(aTHX_ err);
3597 scriptname = mktemp(tmpname);
3599 Perl_croak(aTHX_ err);
3604 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3605 #ifdef FAKE_BIT_BUCKET
3606 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3607 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3608 && strlen(scriptname) == sizeof(tmpname) - 1) {
3611 scriptname = BIT_BUCKET;
3613 # if defined(HAS_FCNTL) && defined(F_SETFD)
3615 /* ensure close-on-exec */
3616 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3619 #endif /* IAMSUID */
3621 /* PSz 16 Sep 03 Keep neat error message */
3623 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3625 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3626 CopFILE(PL_curcop), Strerror(errno));
3632 * I_SYSSTATVFS HAS_FSTATVFS
3634 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3635 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3636 * here so that metaconfig picks them up. */
3640 S_fd_on_nosuid_fs(pTHX_ int fd)
3643 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3644 * but is needed also on machines without setreuid.
3645 * Seems safe enough to run as root.
3647 int check_okay = 0; /* able to do all the required sys/libcalls */
3648 int on_nosuid = 0; /* the fd is on a nosuid fs */
3650 * Need to check noexec also: nosuid might not be set, the average
3651 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3653 int on_noexec = 0; /* the fd is on a noexec fs */
3656 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3657 * fstatvfs() is UNIX98.
3658 * fstatfs() is 4.3 BSD.
3659 * ustat()+getmnt() is pre-4.3 BSD.
3660 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3661 * an irrelevant filesystem while trying to reach the right one.
3664 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3666 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3667 defined(HAS_FSTATVFS)
3668 # define FD_ON_NOSUID_CHECK_OKAY
3669 struct statvfs stfs;
3671 check_okay = fstatvfs(fd, &stfs) == 0;
3672 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3674 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3675 on platforms where it is present. */
3676 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3678 # endif /* fstatvfs */
3680 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3681 defined(PERL_MOUNT_NOSUID) && \
3682 defined(PERL_MOUNT_NOEXEC) && \
3683 defined(HAS_FSTATFS) && \
3684 defined(HAS_STRUCT_STATFS) && \
3685 defined(HAS_STRUCT_STATFS_F_FLAGS)
3686 # define FD_ON_NOSUID_CHECK_OKAY
3689 check_okay = fstatfs(fd, &stfs) == 0;
3690 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3691 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3692 # endif /* fstatfs */
3694 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3695 defined(PERL_MOUNT_NOSUID) && \
3696 defined(PERL_MOUNT_NOEXEC) && \
3697 defined(HAS_FSTAT) && \
3698 defined(HAS_USTAT) && \
3699 defined(HAS_GETMNT) && \
3700 defined(HAS_STRUCT_FS_DATA) && \
3702 # define FD_ON_NOSUID_CHECK_OKAY
3705 if (fstat(fd, &fdst) == 0) {
3707 if (ustat(fdst.st_dev, &us) == 0) {
3709 /* NOSTAT_ONE here because we're not examining fields which
3710 * vary between that case and STAT_ONE. */
3711 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3712 size_t cmplen = sizeof(us.f_fname);
3713 if (sizeof(fsd.fd_req.path) < cmplen)
3714 cmplen = sizeof(fsd.fd_req.path);
3715 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3716 fdst.st_dev == fsd.fd_req.dev) {
3718 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3719 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3724 # endif /* fstat+ustat+getmnt */
3726 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3727 defined(HAS_GETMNTENT) && \
3728 defined(HAS_HASMNTOPT) && \
3729 defined(MNTOPT_NOSUID) && \
3730 defined(MNTOPT_NOEXEC)
3731 # define FD_ON_NOSUID_CHECK_OKAY
3732 FILE *mtab = fopen("/etc/mtab", "r");
3733 struct mntent *entry;
3736 if (mtab && (fstat(fd, &stb) == 0)) {
3737 while (entry = getmntent(mtab)) {
3738 if (stat(entry->mnt_dir, &fsb) == 0
3739 && fsb.st_dev == stb.st_dev)
3741 /* found the filesystem */
3743 if (hasmntopt(entry, MNTOPT_NOSUID))
3745 if (hasmntopt(entry, MNTOPT_NOEXEC))
3748 } /* A single fs may well fail its stat(). */
3753 # endif /* getmntent+hasmntopt */
3756 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3758 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3760 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3761 return ((!check_okay) || on_nosuid || on_noexec);
3763 #endif /* IAMSUID */
3766 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3767 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3772 #endif /* IAMSUID */
3774 /* do we need to emulate setuid on scripts? */
3776 /* This code is for those BSD systems that have setuid #! scripts disabled
3777 * in the kernel because of a security problem. Merely defining DOSUID
3778 * in perl will not fix that problem, but if you have disabled setuid
3779 * scripts in the kernel, this will attempt to emulate setuid and setgid
3780 * on scripts that have those now-otherwise-useless bits set. The setuid
3781 * root version must be called suidperl or sperlN.NNN. If regular perl
3782 * discovers that it has opened a setuid script, it calls suidperl with
3783 * the same argv that it had. If suidperl finds that the script it has
3784 * just opened is NOT setuid root, it sets the effective uid back to the
3785 * uid. We don't just make perl setuid root because that loses the
3786 * effective uid we had before invoking perl, if it was different from the
3789 * Description/comments above do not match current workings:
3790 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3791 * suidperl called with script open and name changed to /dev/fd/N/X;
3792 * suidperl croaks if script is not setuid;
3793 * making perl setuid would be a huge security risk (and yes, that
3794 * would lose any euid we might have had).
3796 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3797 * be defined in suidperl only. suidperl must be setuid root. The
3798 * Configure script will set this up for you if you want it.
3804 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3805 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3806 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3808 const char *linestr;
3812 if (fdscript < 0 || suidscript != 1)
3813 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3815 * Since the script is opened by perl, not suidperl, some of these
3816 * checks are superfluous. Leaving them in probably does not lower
3820 * Do checks even for systems with no HAS_SETREUID.
3821 * We used to swap, then re-swap UIDs with
3822 # ifdef HAS_SETREUID
3823 if (setreuid(PL_euid,PL_uid) < 0
3824 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3825 Perl_croak(aTHX_ "Can't swap uid and euid");
3827 # ifdef HAS_SETREUID
3828 if (setreuid(PL_uid,PL_euid) < 0
3829 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3830 Perl_croak(aTHX_ "Can't reswap uid and euid");
3834 /* On this access check to make sure the directories are readable,
3835 * there is actually a small window that the user could use to make
3836 * filename point to an accessible directory. So there is a faint
3837 * chance that someone could execute a setuid script down in a
3838 * non-accessible directory. I don't know what to do about that.
3839 * But I don't think it's too important. The manual lies when
3840 * it says access() is useful in setuid programs.
3842 * So, access() is pretty useless... but not harmful... do anyway.
3844 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3845 Perl_croak(aTHX_ "Can't access() script\n");
3848 /* If we can swap euid and uid, then we can determine access rights
3849 * with a simple stat of the file, and then compare device and
3850 * inode to make sure we did stat() on the same file we opened.
3851 * Then we just have to make sure he or she can execute it.
3854 * As the script is opened by perl, not suidperl, we do not need to
3855 * care much about access rights.
3857 * The 'script changed' check is needed, or we can get lied to
3858 * about $0 with e.g.
3859 * suidperl /dev/fd/4//bin/x 4<setuidscript
3860 * Without HAS_SETREUID, is it safe to stat() as root?
3862 * Are there any operating systems that pass /dev/fd/xxx for setuid
3863 * scripts, as suggested/described in perlsec(1)? Surely they do not
3864 * pass the script name as we do, so the "script changed" test would
3865 * fail for them... but we never get here with
3866 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3868 * This is one place where we must "lie" about return status: not
3869 * say if the stat() failed. We are doing this as root, and could
3870 * be tricked into reporting existence or not of files that the
3871 * "plain" user cannot even see.
3875 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3876 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3877 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3878 Perl_croak(aTHX_ "Setuid script changed\n");
3882 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3883 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3886 * We used to do this check as the "plain" user (after swapping
3887 * UIDs). But the check for nosuid and noexec filesystem is needed,
3888 * and should be done even without HAS_SETREUID. (Maybe those
3889 * operating systems do not have such mount options anyway...)
3890 * Seems safe enough to do as root.
3892 # if !defined(NO_NOSUID_CHECK)
3893 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3894 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3897 # endif /* IAMSUID */
3899 if (!S_ISREG(PL_statbuf.st_mode)) {
3900 Perl_croak(aTHX_ "Setuid script not plain file\n");
3902 if (PL_statbuf.st_mode & S_IWOTH)
3903 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3904 PL_doswitches = FALSE; /* -s is insecure in suid */
3905 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3906 CopLINE_inc(PL_curcop);
3907 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3908 Perl_croak(aTHX_ "No #! line");
3909 linestr = SvPV_nolen_const(linestr_sv);
3910 /* required even on Sys V */
3911 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3912 Perl_croak(aTHX_ "No #! line");
3916 /* Sanity check on line length */
3917 s_end = s + strlen(s);
3918 if (s_end == s || (s_end - s) > 4000)
3919 Perl_croak(aTHX_ "Very long #! line");
3920 /* Allow more than a single space after #! */
3921 while (isSPACE(*s)) s++;
3922 /* Sanity check on buffer end */
3923 while ((*s) && !isSPACE(*s)) s++;
3924 for (s2 = s; (s2 > linestr &&
3925 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3926 || s2[-1] == '-')); s2--) ;
3927 /* Sanity check on buffer start */
3928 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3929 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3930 Perl_croak(aTHX_ "Not a perl script");
3931 while (*s == ' ' || *s == '\t') s++;
3933 * #! arg must be what we saw above. They can invoke it by
3934 * mentioning suidperl explicitly, but they may not add any strange
3935 * arguments beyond what #! says if they do invoke suidperl that way.
3938 * The way validarg was set up, we rely on the kernel to start
3939 * scripts with argv[1] set to contain all #! line switches (the
3943 * Check that we got all the arguments listed in the #! line (not
3944 * just that there are no extraneous arguments). Might not matter
3945 * much, as switches from #! line seem to be acted upon (also), and
3946 * so may be checked and trapped in perl. But, security checks must
3947 * be done in suidperl and not deferred to perl. Note that suidperl
3948 * does not get around to parsing (and checking) the switches on
3949 * the #! line (but execs perl sooner).
3950 * Allow (require) a trailing newline (which may be of two
3951 * characters on some architectures?) (but no other trailing
3954 len = strlen(validarg);
3955 if (strEQ(validarg," PHOOEY ") ||
3956 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3957 !((s_end - s) == len+1
3958 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3959 Perl_croak(aTHX_ "Args must match #! line");
3963 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3964 PL_euid == PL_statbuf.st_uid)
3966 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3967 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3968 # endif /* IAMSUID */
3971 PL_euid) { /* oops, we're not the setuid root perl */
3973 * When root runs a setuid script, we do not go through the same
3974 * steps of execing sperl and then perl with fd scripts, but
3975 * simply set up UIDs within the same perl invocation; so do
3976 * not have the same checks (on options, whatever) that we have
3977 * for plain users. No problem really: would have to be a script
3978 * that does not actually work for plain users; and if root is
3979 * foolish and can be persuaded to run such an unsafe script, he
3980 * might run also non-setuid ones, and deserves what he gets.
3982 * Or, we might drop the PL_euid check above (and rely just on
3983 * fdscript to avoid loops), and do the execs
3989 * Pass fd script to suidperl.
3990 * Exec suidperl, substituting fd script for scriptname.
3991 * Pass script name as "subdir" of fd, which perl will grok;
3992 * in fact will use that to distinguish this from "normal"
3993 * usage, see comments above.
3995 PerlIO_rewind(rsfp);
3996 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
3997 /* PSz 27 Feb 04 Sanity checks on scriptname */
3998 if ((!scriptname) || (!*scriptname) ) {
3999 Perl_croak(aTHX_ "No setuid script name\n");
4001 if (*scriptname == '-') {
4002 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4003 /* Or we might confuse it with an option when replacing
4004 * name in argument list, below (though we do pointer, not
4005 * string, comparisons).
4008 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4009 if (!PL_origargv[which]) {
4010 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4012 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4013 PerlIO_fileno(rsfp), PL_origargv[which]));
4014 # if defined(HAS_FCNTL) && defined(F_SETFD)
4015 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4018 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4019 (int)PERL_REVISION, (int)PERL_VERSION,
4020 (int)PERL_SUBVERSION), PL_origargv);
4022 # endif /* IAMSUID */
4023 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4026 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4028 * This seems back to front: we try HAS_SETEGID first; if not available
4029 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4030 * in the sense that we only want to set EGID; but are there any machines
4031 * with either of the latter, but not the former? Same with UID, later.
4034 (void)setegid(PL_statbuf.st_gid);
4036 # ifdef HAS_SETREGID
4037 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4039 # ifdef HAS_SETRESGID
4040 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4042 PerlProc_setgid(PL_statbuf.st_gid);
4046 if (PerlProc_getegid() != PL_statbuf.st_gid)
4047 Perl_croak(aTHX_ "Can't do setegid!\n");
4049 if (PL_statbuf.st_mode & S_ISUID) {
4050 if (PL_statbuf.st_uid != PL_euid)
4052 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4054 # ifdef HAS_SETREUID
4055 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4057 # ifdef HAS_SETRESUID
4058 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4060 PerlProc_setuid(PL_statbuf.st_uid);
4064 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4065 Perl_croak(aTHX_ "Can't do seteuid!\n");
4067 else if (PL_uid) { /* oops, mustn't run as root */
4069 (void)seteuid((Uid_t)PL_uid);
4071 # ifdef HAS_SETREUID
4072 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4074 # ifdef HAS_SETRESUID
4075 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4077 PerlProc_setuid((Uid_t)PL_uid);
4081 if (PerlProc_geteuid() != PL_uid)
4082 Perl_croak(aTHX_ "Can't do seteuid!\n");
4085 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4086 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4089 else if (fdscript < 0 || suidscript != 1)
4090 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4091 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4093 /* PSz 16 Sep 03 Keep neat error message */
4094 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4097 /* We absolutely must clear out any saved ids here, so we */
4098 /* exec the real perl, substituting fd script for scriptname. */
4099 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4101 * It might be thought that using setresgid and/or setresuid (changed to
4102 * set the saved IDs) above might obviate the need to exec, and we could
4103 * go on to "do the perl thing".
4105 * Is there such a thing as "saved GID", and is that set for setuid (but
4106 * not setgid) execution like suidperl? Without exec, it would not be
4107 * cleared for setuid (but not setgid) scripts (or might need a dummy
4110 * We need suidperl to do the exact same argument checking that perl
4111 * does. Thus it cannot be very small; while it could be significantly
4112 * smaller, it is safer (simpler?) to make it essentially the same
4113 * binary as perl (but they are not identical). - Maybe could defer that
4114 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4115 * but prefer to do thorough checks in suidperl itself. Such deferral
4116 * would make suidperl security rely on perl, a design no-no.
4118 * Setuid things should be short and simple, thus easy to understand and
4119 * verify. They should do their "own thing", without influence by
4120 * attackers. It may help if their internal execution flow is fixed,
4121 * regardless of platform: it may be best to exec anyway.
4123 * Suidperl should at least be conceptually simple: a wrapper only,
4124 * never to do any real perl. Maybe we should put
4126 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4128 * into the perly bits.
4130 PerlIO_rewind(rsfp);
4131 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4133 * Keep original arguments: suidperl already has fd script.
4135 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4136 /* if (!PL_origargv[which]) { */
4137 /* errno = EPERM; */
4138 /* Perl_croak(aTHX_ "Permission denied\n"); */
4140 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4141 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4142 # if defined(HAS_FCNTL) && defined(F_SETFD)
4143 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4146 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4147 (int)PERL_REVISION, (int)PERL_VERSION,
4148 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4150 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4151 # endif /* IAMSUID */
4153 PERL_UNUSED_ARG(fdscript);
4154 PERL_UNUSED_ARG(suidscript);
4155 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4156 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4157 PERL_UNUSED_ARG(rsfp);
4159 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4160 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4162 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4165 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4166 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4167 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4168 /* not set-id, must be wrapped */
4171 PERL_UNUSED_ARG(validarg);
4172 PERL_UNUSED_ARG(scriptname);
4173 PERL_UNUSED_ARG(linestr_sv);
4177 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4181 register const char *s2;
4182 #ifdef MACOS_TRADITIONAL
4186 /* skip forward in input to the real script? */
4188 #ifdef MACOS_TRADITIONAL
4189 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4191 while (PL_doextract || gMacPerl_AlwaysExtract) {
4192 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4193 if (!gMacPerl_AlwaysExtract)
4194 Perl_croak(aTHX_ "No Perl script found in input\n");
4196 if (PL_doextract) /* require explicit override ? */
4197 if (!OverrideExtract(PL_origfilename))
4198 Perl_croak(aTHX_ "User aborted script\n");
4200 PL_doextract = FALSE;
4202 /* Pater peccavi, file does not have #! */
4203 PerlIO_rewind(rsfp);
4208 while (PL_doextract) {
4209 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4210 Perl_croak(aTHX_ "No Perl script found in input\n");
4213 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4214 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4215 PL_doextract = FALSE;
4216 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4218 while (*s == ' ' || *s == '\t') s++;
4220 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4221 || s2[-1] == '_') s2--;
4222 if (strnEQ(s2-4,"perl",4))
4223 while ((s = moreswitches(s)))
4226 #ifdef MACOS_TRADITIONAL
4227 /* We are always searching for the #!perl line in MacPerl,
4228 * so if we find it, still keep the line count correct
4229 * by counting lines we already skipped over
4231 for (; maclines > 0 ; maclines--)
4232 PerlIO_ungetc(rsfp, '\n');
4236 /* gMacPerl_AlwaysExtract is false in MPW tool */
4237 } else if (gMacPerl_AlwaysExtract) {
4249 PL_uid = PerlProc_getuid();
4250 PL_euid = PerlProc_geteuid();
4251 PL_gid = PerlProc_getgid();
4252 PL_egid = PerlProc_getegid();
4254 PL_uid |= PL_gid << 16;
4255 PL_euid |= PL_egid << 16;
4257 /* Should not happen: */
4258 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4259 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4262 * Should go by suidscript, not uid!=euid: why disallow
4263 * system("ls") in scripts run from setuid things?
4264 * Or, is this run before we check arguments and set suidscript?
4265 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4266 * (We never have suidscript, can we be sure to have fdscript?)
4267 * Or must then go by UID checks? See comments in forbid_setid also.
4271 /* This is used very early in the lifetime of the program,
4272 * before even the options are parsed, so PL_tainting has
4273 * not been initialized properly. */
4275 Perl_doing_taint(int argc, char *argv[], char *envp[])
4277 #ifndef PERL_IMPLICIT_SYS
4278 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4279 * before we have an interpreter-- and the whole point of this
4280 * function is to be called at such an early stage. If you are on
4281 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4282 * "tainted because running with altered effective ids', you'll
4283 * have to add your own checks somewhere in here. The two most
4284 * known samples of 'implicitness' are Win32 and NetWare, neither
4285 * of which has much of concept of 'uids'. */
4286 int uid = PerlProc_getuid();
4287 int euid = PerlProc_geteuid();
4288 int gid = PerlProc_getgid();
4289 int egid = PerlProc_getegid();
4296 if (uid && (euid != uid || egid != gid))
4298 #endif /* !PERL_IMPLICIT_SYS */
4299 /* This is a really primitive check; environment gets ignored only
4300 * if -T are the first chars together; otherwise one gets
4301 * "Too late" message. */
4302 if ( argc > 1 && argv[1][0] == '-'
4303 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4308 /* Passing the flag as a single char rather than a string is a slight space
4309 optimisation. The only message that isn't /^-.$/ is
4310 "program input from stdin", which is substituted in place of '\0', which
4311 could never be a command line flag. */
4313 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4316 char string[3] = "-x";
4317 const char *message = "program input from stdin";
4324 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4325 if (PL_euid != PL_uid)
4326 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4327 if (PL_egid != PL_gid)
4328 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4329 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4331 * Checks for UID/GID above "wrong": why disallow
4332 * perl -e 'print "Hello\n"'
4333 * from within setuid things?? Simply drop them: replaced by
4334 * fdscript/suidscript and #ifdef IAMSUID checks below.
4336 * This may be too late for command-line switches. Will catch those on
4337 * the #! line, after finding the script name and setting up
4338 * fdscript/suidscript. Note that suidperl does not get around to
4339 * parsing (and checking) the switches on the #! line, but checks that
4340 * the two sets are identical.
4342 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4343 * instead, or would that be "too late"? (We never have suidscript, can
4344 * we be sure to have fdscript?)
4346 * Catch things with suidscript (in descendant of suidperl), even with
4347 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4348 * below; but I am paranoid.
4350 * Also see comments about root running a setuid script, elsewhere.
4352 if (suidscript >= 0)
4353 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4355 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4356 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4357 #endif /* IAMSUID */
4361 Perl_init_debugger(pTHX)
4364 HV * const ostash = PL_curstash;
4366 PL_curstash = PL_debstash;
4367 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4369 AvREAL_off(PL_dbargs);
4370 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4371 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4372 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4373 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4374 sv_setiv(PL_DBsingle, 0);
4375 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4376 sv_setiv(PL_DBtrace, 0);
4377 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4378 sv_setiv(PL_DBsignal, 0);
4379 PL_curstash = ostash;
4382 #ifndef STRESS_REALLOC
4383 #define REASONABLE(size) (size)
4385 #define REASONABLE(size) (1) /* unreasonable */
4389 Perl_init_stacks(pTHX)
4392 /* start with 128-item stack and 8K cxstack */
4393 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4394 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4395 PL_curstackinfo->si_type = PERLSI_MAIN;
4396 PL_curstack = PL_curstackinfo->si_stack;
4397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4399 PL_stack_base = AvARRAY(PL_curstack);
4400 PL_stack_sp = PL_stack_base;
4401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4403 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4406 PL_tmps_max = REASONABLE(128);
4408 Newx(PL_markstack,REASONABLE(32),I32);
4409 PL_markstack_ptr = PL_markstack;
4410 PL_markstack_max = PL_markstack + REASONABLE(32);
4414 Newx(PL_scopestack,REASONABLE(32),I32);
4415 PL_scopestack_ix = 0;
4416 PL_scopestack_max = REASONABLE(32);
4418 Newx(PL_savestack,REASONABLE(128),ANY);
4419 PL_savestack_ix = 0;
4420 PL_savestack_max = REASONABLE(128);
4429 while (PL_curstackinfo->si_next)
4430 PL_curstackinfo = PL_curstackinfo->si_next;
4431 while (PL_curstackinfo) {
4432 PERL_SI *p = PL_curstackinfo->si_prev;
4433 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4434 Safefree(PL_curstackinfo->si_cxstack);
4435 Safefree(PL_curstackinfo);
4436 PL_curstackinfo = p;
4438 Safefree(PL_tmps_stack);
4439 Safefree(PL_markstack);
4440 Safefree(PL_scopestack);
4441 Safefree(PL_savestack);
4446 S_init_predump_symbols(pTHX)
4452 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4453 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4454 GvMULTI_on(PL_stdingv);
4455 io = GvIOp(PL_stdingv);
4456 IoTYPE(io) = IoTYPE_RDONLY;
4457 IoIFP(io) = PerlIO_stdin();
4458 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4460 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4462 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4465 IoTYPE(io) = IoTYPE_WRONLY;
4466 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4468 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4470 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4472 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4473 GvMULTI_on(PL_stderrgv);
4474 io = GvIOp(PL_stderrgv);
4475 IoTYPE(io) = IoTYPE_WRONLY;
4476 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4477 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4479 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4481 PL_statname = newSV(0); /* last filename we did stat on */
4483 Safefree(PL_osname);
4484 PL_osname = savepv(OSNAME);
4488 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4491 argc--,argv++; /* skip name of script */
4492 if (PL_doswitches) {
4493 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4497 if (argv[0][1] == '-' && !argv[0][2]) {
4501 if ((s = strchr(argv[0], '='))) {
4502 const char *const start_name = argv[0] + 1;
4503 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4504 TRUE, SVt_PV)), s + 1);
4507 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4510 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4511 GvMULTI_on(PL_argvgv);
4512 (void)gv_AVadd(PL_argvgv);
4513 av_clear(GvAVn(PL_argvgv));
4514 for (; argc > 0; argc--,argv++) {
4515 SV * const sv = newSVpv(argv[0],0);
4516 av_push(GvAVn(PL_argvgv),sv);
4517 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4518 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4521 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4522 (void)sv_utf8_decode(sv);
4528 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4533 PL_toptarget = newSV_type(SVt_PVFM);
4534 sv_setpvn(PL_toptarget, "", 0);
4535 PL_bodytarget = newSV_type(SVt_PVFM);
4536 sv_setpvn(PL_bodytarget, "", 0);
4537 PL_formtarget = PL_bodytarget;
4541 init_argv_symbols(argc,argv);
4543 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4544 #ifdef MACOS_TRADITIONAL
4545 /* $0 is not majick on a Mac */
4546 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4548 sv_setpv(GvSV(tmpgv),PL_origfilename);
4549 magicname("0", "0", 1);
4552 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4554 bool env_is_not_environ;
4555 GvMULTI_on(PL_envgv);
4556 hv = GvHVn(PL_envgv);
4557 hv_magic(hv, NULL, PERL_MAGIC_env);
4559 #ifdef USE_ENVIRON_ARRAY
4560 /* Note that if the supplied env parameter is actually a copy
4561 of the global environ then it may now point to free'd memory
4562 if the environment has been modified since. To avoid this
4563 problem we treat env==NULL as meaning 'use the default'
4567 env_is_not_environ = env != environ;
4568 if (env_is_not_environ
4569 # ifdef USE_ITHREADS
4570 && PL_curinterp == aTHX
4579 for (; *env; env++) {
4580 if (!(s = strchr(*env,'=')) || s == *env)
4582 #if defined(MSDOS) && !defined(DJGPP)
4587 sv = newSVpv(s+1, 0);
4588 (void)hv_store(hv, *env, s - *env, sv, 0);
4589 if (env_is_not_environ)
4593 #endif /* USE_ENVIRON_ARRAY */
4594 #endif /* !PERL_MICRO */
4597 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4598 SvREADONLY_off(GvSV(tmpgv));
4599 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4600 SvREADONLY_on(GvSV(tmpgv));
4602 #ifdef THREADS_HAVE_PIDS
4603 PL_ppid = (IV)getppid();
4606 /* touch @F array to prevent spurious warnings 20020415 MJD */
4608 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4613 S_init_perllib(pTHX)
4619 s = PerlEnv_getenv("PERL5LIB");
4621 * It isn't possible to delete an environment variable with
4622 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4623 * case we treat PERL5LIB as undefined if it has a zero-length value.
4625 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4626 if (s && *s != '\0')
4630 incpush(s, TRUE, TRUE, TRUE, FALSE);
4632 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4634 /* Treat PERL5?LIB as a possible search list logical name -- the
4635 * "natural" VMS idiom for a Unix path string. We allow each
4636 * element to be a set of |-separated directories for compatibility.
4640 if (my_trnlnm("PERL5LIB",buf,0))
4641 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4643 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4647 /* Use the ~-expanded versions of APPLLIB (undocumented),
4648 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4651 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4655 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4657 #ifdef MACOS_TRADITIONAL
4660 SV * privdir = newSV(0);
4661 char * macperl = PerlEnv_getenv("MACPERL");
4666 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4667 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4668 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4669 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4670 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4671 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4673 SvREFCNT_dec(privdir);
4676 incpush(":", FALSE, FALSE, TRUE, FALSE);
4679 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4682 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4684 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4688 /* sitearch is always relative to sitelib on Windows for
4689 * DLL-based path intuition to work correctly */
4690 # if !defined(WIN32)
4691 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4697 /* this picks up sitearch as well */
4698 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4700 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4704 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4705 /* Search for version-specific dirs below here */
4706 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4709 #ifdef PERL_VENDORARCH_EXP
4710 /* vendorarch is always relative to vendorlib on Windows for
4711 * DLL-based path intuition to work correctly */
4712 # if !defined(WIN32)
4713 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4717 #ifdef PERL_VENDORLIB_EXP
4719 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4721 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4725 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4726 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4729 #ifdef PERL_OTHERLIBDIRS
4730 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4734 incpush(".", FALSE, FALSE, TRUE, FALSE);
4735 #endif /* MACOS_TRADITIONAL */
4738 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4739 # define PERLLIB_SEP ';'
4742 # define PERLLIB_SEP '|'
4744 # if defined(MACOS_TRADITIONAL)
4745 # define PERLLIB_SEP ','
4747 # define PERLLIB_SEP ':'
4751 #ifndef PERLLIB_MANGLE
4752 # define PERLLIB_MANGLE(s,n) (s)
4755 /* Push a directory onto @INC if it exists.
4756 Generate a new SV if we do this, to save needing to copy the SV we push
4759 S_incpush_if_exists(pTHX_ SV *dir)
4763 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4764 S_ISDIR(tmpstatbuf.st_mode)) {
4765 av_push(GvAVn(PL_incgv), dir);
4772 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4777 const char *p = dir;
4782 if (addsubdirs || addoldvers) {
4786 /* Break at all separators */
4788 SV *libdir = newSV(0);
4791 /* skip any consecutive separators */
4793 while ( *p == PERLLIB_SEP ) {
4794 /* Uncomment the next line for PATH semantics */
4795 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4800 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4801 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4806 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4807 p = NULL; /* break out */
4809 #ifdef MACOS_TRADITIONAL
4810 if (!strchr(SvPVX(libdir), ':')) {
4813 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4815 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4816 sv_catpvs(libdir, ":");
4819 /* Do the if() outside the #ifdef to avoid warnings about an unused
4822 #ifdef PERL_RELOCATABLE_INC
4824 * Relocatable include entries are marked with a leading .../
4827 * 0: Remove that leading ".../"
4828 * 1: Remove trailing executable name (anything after the last '/')
4829 * from the perl path to give a perl prefix
4831 * While the @INC element starts "../" and the prefix ends with a real
4832 * directory (ie not . or ..) chop that real directory off the prefix
4833 * and the leading "../" from the @INC element. ie a logical "../"
4835 * Finally concatenate the prefix and the remainder of the @INC element
4836 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4837 * generates /usr/local/lib/perl5
4839 const char *libpath = SvPVX(libdir);
4840 STRLEN libpath_len = SvCUR(libdir);
4841 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4843 SV * const caret_X = get_sv("\030", 0);
4844 /* Going to use the SV just as a scratch buffer holding a C
4850 /* $^X is *the* source of taint if tainting is on, hence
4851 SvPOK() won't be true. */
4853 assert(SvPOKp(caret_X));
4854 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4856 /* Firstly take off the leading .../
4857 If all else fail we'll do the paths relative to the current
4859 sv_chop(libdir, libpath + 4);
4860 /* Don't use SvPV as we're intentionally bypassing taining,
4861 mortal copies that the mg_get of tainting creates, and
4862 corruption that seems to come via the save stack.
4863 I guess that the save stack isn't correctly set up yet. */
4864 libpath = SvPVX(libdir);
4865 libpath_len = SvCUR(libdir);
4867 /* This would work more efficiently with memrchr, but as it's
4868 only a GNU extension we'd need to probe for it and
4869 implement our own. Not hard, but maybe not worth it? */
4871 prefix = SvPVX(prefix_sv);
4872 lastslash = strrchr(prefix, '/');
4874 /* First time in with the *lastslash = '\0' we just wipe off
4875 the trailing /perl from (say) /usr/foo/bin/perl
4879 while ((*lastslash = '\0'), /* Do that, come what may. */
4880 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4881 && (lastslash = strrchr(prefix, '/')))) {
4882 if (lastslash[1] == '\0'
4883 || (lastslash[1] == '.'
4884 && (lastslash[2] == '/' /* ends "/." */
4885 || (lastslash[2] == '/'
4886 && lastslash[3] == '/' /* or "/.." */
4888 /* Prefix ends "/" or "/." or "/..", any of which
4889 are fishy, so don't do any more logical cleanup.
4893 /* Remove leading "../" from path */
4896 /* Next iteration round the loop removes the last
4897 directory name from prefix by writing a '\0' in
4898 the while clause. */
4900 /* prefix has been terminated with a '\0' to the correct
4901 length. libpath points somewhere into the libdir SV.
4902 We need to join the 2 with '/' and drop the result into
4904 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4905 SvREFCNT_dec(libdir);
4906 /* And this is the new libdir. */
4909 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4910 /* Need to taint reloccated paths if running set ID */
4911 SvTAINTED_on(libdir);
4914 SvREFCNT_dec(prefix_sv);
4919 * BEFORE pushing libdir onto @INC we may first push version- and
4920 * archname-specific sub-directories.
4922 if (addsubdirs || addoldvers) {
4923 #ifdef PERL_INC_VERSION_LIST
4924 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4925 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4926 const char * const *incver;
4932 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4934 while (unix[len-1] == '/') len--; /* Cosmetic */
4935 sv_usepvn(libdir,unix,len);
4938 PerlIO_printf(Perl_error_log,
4939 "Failed to unixify @INC element \"%s\"\n",
4943 #ifdef MACOS_TRADITIONAL
4944 #define PERL_AV_SUFFIX_FMT ""
4945 #define PERL_ARCH_FMT "%s:"
4946 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4948 #define PERL_AV_SUFFIX_FMT "/"
4949 #define PERL_ARCH_FMT "/%s"
4950 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4952 /* .../version/archname if -d .../version/archname */
4953 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4955 (int)PERL_REVISION, (int)PERL_VERSION,
4956 (int)PERL_SUBVERSION, ARCHNAME);
4957 subdir = S_incpush_if_exists(aTHX_ subdir);
4959 /* .../version if -d .../version */
4960 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4962 (int)PERL_REVISION, (int)PERL_VERSION,
4963 (int)PERL_SUBVERSION);
4964 subdir = S_incpush_if_exists(aTHX_ subdir);
4966 /* .../archname if -d .../archname */
4967 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4968 SVfARG(libdir), ARCHNAME);
4969 subdir = S_incpush_if_exists(aTHX_ subdir);
4973 #ifdef PERL_INC_VERSION_LIST
4975 for (incver = incverlist; *incver; incver++) {
4976 /* .../xxx if -d .../xxx */
4977 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4978 SVfARG(libdir), *incver);
4979 subdir = S_incpush_if_exists(aTHX_ subdir);
4985 /* finally push this lib directory on the end of @INC */
4986 av_push(GvAVn(PL_incgv), libdir);
4989 assert (SvREFCNT(subdir) == 1);
4990 SvREFCNT_dec(subdir);
4996 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5000 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5006 while (av_len(paramList) >= 0) {
5007 cv = (CV*)av_shift(paramList);
5009 if (paramList == PL_beginav) {
5010 /* save PL_beginav for compiler */
5011 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5013 else if (paramList == PL_checkav) {
5014 /* save PL_checkav for compiler */
5015 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5017 else if (paramList == PL_unitcheckav) {
5018 /* save PL_unitcheckav for compiler */
5019 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5030 PL_madskills |= 16384;
5035 PL_madskills &= ~16384;
5038 (void)SvPV_const(atsv, len);
5040 PL_curcop = &PL_compiling;
5041 CopLINE_set(PL_curcop, oldline);
5042 if (paramList == PL_beginav)
5043 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5045 Perl_sv_catpvf(aTHX_ atsv,
5046 "%s failed--call queue aborted",
5047 paramList == PL_checkav ? "CHECK"
5048 : paramList == PL_initav ? "INIT"
5049 : paramList == PL_unitcheckav ? "UNITCHECK"
5051 while (PL_scopestack_ix > oldscope)
5054 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5061 /* my_exit() was called */
5062 while (PL_scopestack_ix > oldscope)
5065 PL_curstash = PL_defstash;
5066 PL_curcop = &PL_compiling;
5067 CopLINE_set(PL_curcop, oldline);
5069 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5070 if (paramList == PL_beginav)
5071 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5073 Perl_croak(aTHX_ "%s failed--call queue aborted",
5074 paramList == PL_checkav ? "CHECK"
5075 : paramList == PL_initav ? "INIT"
5076 : paramList == PL_unitcheckav ? "UNITCHECK"
5083 PL_curcop = &PL_compiling;
5084 CopLINE_set(PL_curcop, oldline);
5087 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5096 Perl_my_exit(pTHX_ U32 status)
5099 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5100 (void*)thr, (unsigned long) status));
5109 STATUS_EXIT_SET(status);
5116 Perl_my_failure_exit(pTHX)
5120 /* We have been called to fall on our sword. The desired exit code
5121 * should be already set in STATUS_UNIX, but could be shifted over
5122 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5125 * If an error code has not been set, then force the issue.
5127 if (MY_POSIX_EXIT) {
5129 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5130 * the exit code when there isn't an error.
5133 if (STATUS_UNIX == 0)
5134 STATUS_UNIX_EXIT_SET(255);
5136 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5138 /* The exit code could have been set by $? or vmsish which
5139 * means that it may not be fatal. So convert
5140 * success/warning codes to fatal.
5142 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5143 STATUS_UNIX_EXIT_SET(255);
5147 /* Traditionally Perl on VMS always expects a Fatal Error. */
5148 if (vaxc$errno & 1) {
5150 /* So force success status to failure */
5151 if (STATUS_NATIVE & 1)
5156 STATUS_UNIX = EINTR; /* In case something cares */
5161 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5163 /* Encode the severity code */
5164 severity = STATUS_NATIVE & STS$M_SEVERITY;
5165 STATUS_UNIX = (severity ? severity : 1) << 8;
5167 /* Perl expects this to be a fatal error */
5168 if (severity != STS$K_SEVERE)
5177 STATUS_UNIX_SET(errno);
5179 exitstatus = STATUS_UNIX >> 8;
5180 if (exitstatus & 255)
5181 STATUS_UNIX_SET(exitstatus);
5183 STATUS_UNIX_SET(255);
5190 S_my_exit_jump(pTHX)
5195 SvREFCNT_dec(PL_e_script);
5199 POPSTACK_TO(PL_mainstack);
5207 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5210 const char * const p = SvPVX_const(PL_e_script);
5211 const char *nl = strchr(p, '\n');
5213 PERL_UNUSED_ARG(idx);
5214 PERL_UNUSED_ARG(maxlen);
5216 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5218 filter_del(read_e_script);
5221 sv_catpvn(buf_sv, p, nl-p);
5222 sv_chop(PL_e_script, nl);
5228 * c-indentation-style: bsd
5230 * indent-tabs-mode: t
5233 * ex: set ts=8 sts=4 sw=4 noet: