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)
190 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
191 PERL_UNUSED_ARG(argv);
192 PERL_SYS_INIT_BODY(argc, argv);
196 Perl_sys_init3(int* argc, char*** argv, char*** env)
198 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
199 PERL_UNUSED_ARG(argv);
200 PERL_UNUSED_ARG(env);
201 PERL_SYS_INIT3_BODY(argc, argv, env);
207 PERL_SYS_TERM_BODY();
211 #ifdef PERL_IMPLICIT_SYS
213 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
214 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
215 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
216 struct IPerlDir* ipD, struct IPerlSock* ipS,
217 struct IPerlProc* ipP)
219 PerlInterpreter *my_perl;
220 /* Newx() needs interpreter, so call malloc() instead */
221 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
222 S_init_tls_and_interp(my_perl);
223 Zero(my_perl, 1, PerlInterpreter);
233 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
240 =head1 Embedding Functions
242 =for apidoc perl_alloc
244 Allocates a new Perl interpreter. See L<perlembed>.
252 PerlInterpreter *my_perl;
254 /* Newx() needs interpreter, so call malloc() instead */
255 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
257 S_init_tls_and_interp(my_perl);
258 #ifndef PERL_TRACK_MEMPOOL
259 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
261 Zero(my_perl, 1, PerlInterpreter);
262 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
266 #endif /* PERL_IMPLICIT_SYS */
269 =for apidoc perl_construct
271 Initializes a new Perl interpreter. See L<perlembed>.
277 perl_construct(pTHXx)
280 PERL_UNUSED_ARG(my_perl);
283 PL_perl_destruct_level = 1;
285 if (PL_perl_destruct_level > 0)
288 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
290 /* set read-only and try to insure than we wont see REFCNT==0
293 SvREADONLY_on(&PL_sv_undef);
294 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
296 sv_setpv(&PL_sv_no,PL_No);
297 /* value lookup in void context - happens to have the side effect
298 of caching the numeric forms. */
301 SvREADONLY_on(&PL_sv_no);
302 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
304 sv_setpv(&PL_sv_yes,PL_Yes);
307 SvREADONLY_on(&PL_sv_yes);
308 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
310 SvREADONLY_on(&PL_sv_placeholder);
311 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
313 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
314 #ifdef PERL_USES_PL_PIDSTATUS
315 PL_pidstatus = newHV();
318 PL_rs = newSVpvs("\n");
328 SET_NUMERIC_STANDARD();
330 #if defined(LOCAL_PATCH_COUNT)
331 PL_localpatches = local_patches; /* For possible -v */
334 #ifdef HAVE_INTERP_INTERN
338 PerlIO_init(aTHX); /* Hook to IO system */
340 PL_fdpid = newAV(); /* for remembering popen pids by fd */
341 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
342 PL_errors = newSVpvs("");
343 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
344 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
345 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
347 /* First entry is an array of empty elements */
348 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
349 PL_regex_pad = AvARRAY(PL_regex_padav);
351 #ifdef USE_REENTRANT_API
352 Perl_reentrant_init(aTHX);
355 /* Note that strtab is a rather special HV. Assumptions are made
356 about not iterating on it, and not adding tie magic to it.
357 It is properly deallocated in perl_destruct() */
360 HvSHAREKEYS_off(PL_strtab); /* mandatory */
361 hv_ksplit(PL_strtab, 512);
363 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
364 _dyld_lookup_and_bind
365 ("__environ", (unsigned long *) &environ_pointer, NULL);
369 # ifdef USE_ENVIRON_ARRAY
370 PL_origenviron = environ;
374 /* Use sysconf(_SC_CLK_TCK) if available, if not
375 * available or if the sysconf() fails, use the HZ.
376 * BeOS has those, but returns the wrong value.
377 * The HZ if not originally defined has been by now
378 * been defined as CLK_TCK, if available. */
379 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
380 PL_clocktick = sysconf(_SC_CLK_TCK);
381 if (PL_clocktick <= 0)
385 PL_stashcache = newHV();
387 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
388 (int)PERL_VERSION, (int)PERL_SUBVERSION);
391 if (!PL_mmap_page_size) {
392 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
394 SETERRNO(0, SS_NORMAL);
396 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
398 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
400 if ((long) PL_mmap_page_size < 0) {
402 SV * const error = ERRSV;
403 SvUPGRADE(error, SVt_PV);
404 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
407 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
411 # ifdef HAS_GETPAGESIZE
412 PL_mmap_page_size = getpagesize();
414 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
415 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
419 if (PL_mmap_page_size <= 0)
420 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
421 (IV) PL_mmap_page_size);
423 #endif /* HAS_MMAP */
425 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
426 PL_timesbase.tms_utime = 0;
427 PL_timesbase.tms_stime = 0;
428 PL_timesbase.tms_cutime = 0;
429 PL_timesbase.tms_cstime = 0;
436 =for apidoc nothreadhook
438 Stub that provides thread hook for perl_destruct when there are
445 Perl_nothreadhook(pTHX)
451 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
453 Perl_dump_sv_child(pTHX_ SV *sv)
456 const int sock = PL_dumper_fd;
457 const int debug_fd = PerlIO_fileno(Perl_debug_log);
458 union control_un control;
461 struct cmsghdr *cmptr;
463 unsigned char buffer[256];
465 if(sock == -1 || debug_fd == -1)
468 PerlIO_flush(Perl_debug_log);
470 /* All these shenanigans are to pass a file descriptor over to our child for
471 it to dump out to. We can't let it hold open the file descriptor when it
472 forks, as the file descriptor it will dump to can turn out to be one end
473 of pipe that some other process will wait on for EOF. (So as it would
474 be open, the wait would be forever.) */
476 msg.msg_control = control.control;
477 msg.msg_controllen = sizeof(control.control);
478 /* We're a connected socket so we don't need a destination */
484 cmptr = CMSG_FIRSTHDR(&msg);
485 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
486 cmptr->cmsg_level = SOL_SOCKET;
487 cmptr->cmsg_type = SCM_RIGHTS;
488 *((int *)CMSG_DATA(cmptr)) = 1;
490 vec[0].iov_base = (void*)&sv;
491 vec[0].iov_len = sizeof(sv);
492 got = sendmsg(sock, &msg, 0);
495 perror("Debug leaking scalars parent sendmsg failed");
498 if(got < sizeof(sv)) {
499 perror("Debug leaking scalars parent short sendmsg");
503 /* Return protocol is
505 unsigned char: length of location string (0 for empty)
506 unsigned char*: string (not terminated)
508 vec[0].iov_base = (void*)&returned_errno;
509 vec[0].iov_len = sizeof(returned_errno);
510 vec[1].iov_base = buffer;
513 got = readv(sock, vec, 2);
516 perror("Debug leaking scalars parent read failed");
517 PerlIO_flush(PerlIO_stderr());
520 if(got < sizeof(returned_errno) + 1) {
521 perror("Debug leaking scalars parent short read");
522 PerlIO_flush(PerlIO_stderr());
527 got = read(sock, buffer + 1, *buffer);
529 perror("Debug leaking scalars parent read 2 failed");
530 PerlIO_flush(PerlIO_stderr());
535 perror("Debug leaking scalars parent short read 2");
536 PerlIO_flush(PerlIO_stderr());
541 if (returned_errno || *buffer) {
542 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
543 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
544 returned_errno, strerror(returned_errno));
550 =for apidoc perl_destruct
552 Shuts down a Perl interpreter. See L<perlembed>.
561 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
563 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
567 PERL_UNUSED_ARG(my_perl);
569 /* wait for all pseudo-forked children to finish */
570 PERL_WAIT_FOR_CHILDREN;
572 destruct_level = PL_perl_destruct_level;
575 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
577 const int i = atoi(s);
578 if (destruct_level < i)
584 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
590 if (PL_endav && !PL_minus_c)
591 call_list(PL_scopestack_ix, PL_endav);
597 /* Need to flush since END blocks can produce output */
600 if (CALL_FPTR(PL_threadhook)(aTHX)) {
601 /* Threads hook has vetoed further cleanup */
602 PL_veto_cleanup = TRUE;
606 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
607 if (destruct_level != 0) {
608 /* Fork here to create a child. Our child's job is to preserve the
609 state of scalars prior to destruction, so that we can instruct it
610 to dump any scalars that we later find have leaked.
611 There's no subtlety in this code - it assumes POSIX, and it doesn't
615 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
616 perror("Debug leaking scalars socketpair failed");
622 perror("Debug leaking scalars fork failed");
626 /* We are the child */
627 const int sock = fd[1];
628 const int debug_fd = PerlIO_fileno(Perl_debug_log);
631 /* Our success message is an integer 0, and a char 0 */
632 static const char success[sizeof(int) + 1];
636 /* We need to close all other file descriptors otherwise we end up
637 with interesting hangs, where the parent closes its end of a
638 pipe, and sits waiting for (another) child to terminate. Only
639 that child never terminates, because it never gets EOF, because
640 we also have the far end of the pipe open. We even need to
641 close the debugging fd, because sometimes it happens to be one
642 end of a pipe, and a process is waiting on the other end for
643 EOF. Normally it would be closed at some point earlier in
644 destruction, but if we happen to cause the pipe to remain open,
645 EOF never occurs, and we get an infinite hang. Hence all the
646 games to pass in a file descriptor if it's actually needed. */
648 f = sysconf(_SC_OPEN_MAX);
650 where = "sysconf failed";
661 union control_un control;
664 struct cmsghdr *cmptr;
668 msg.msg_control = control.control;
669 msg.msg_controllen = sizeof(control.control);
670 /* We're a connected socket so we don't need a source */
674 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
676 vec[0].iov_base = (void*)⌖
677 vec[0].iov_len = sizeof(target);
679 got = recvmsg(sock, &msg, 0);
684 where = "recv failed";
687 if(got < sizeof(target)) {
688 where = "short recv";
692 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
696 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
697 where = "wrong cmsg_len";
700 if(cmptr->cmsg_level != SOL_SOCKET) {
701 where = "wrong cmsg_level";
704 if(cmptr->cmsg_type != SCM_RIGHTS) {
705 where = "wrong cmsg_type";
709 got_fd = *(int*)CMSG_DATA(cmptr);
710 /* For our last little bit of trickery, put the file descriptor
711 back into Perl_debug_log, as if we never actually closed it
713 if(got_fd != debug_fd) {
714 if (dup2(got_fd, debug_fd) == -1) {
721 PerlIO_flush(Perl_debug_log);
723 got = write(sock, &success, sizeof(success));
726 where = "write failed";
729 if(got < sizeof(success)) {
730 where = "short write";
737 int send_errno = errno;
738 unsigned char length = (unsigned char) strlen(where);
739 struct iovec failure[3] = {
740 {(void*)&send_errno, sizeof(send_errno)},
742 {(void*)where, length}
744 int got = writev(sock, failure, 3);
745 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
746 in the parent if we try to read from the socketpair after the
747 child has exited, even if there was data to read.
748 So sleep a bit to give the parent a fighting chance of
751 _exit((got == -1) ? errno : 0);
755 PL_dumper_fd = fd[0];
760 /* We must account for everything. */
762 /* Destroy the main CV and syntax tree */
763 /* Do this now, because destroying ops can cause new SVs to be generated
764 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
765 PL_curcop to point to a valid op from which the filename structure
767 PL_curcop = &PL_compiling;
769 /* ensure comppad/curpad to refer to main's pad */
770 if (CvPADLIST(PL_main_cv)) {
771 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
773 op_free(PL_main_root);
776 PL_main_start = NULL;
777 SvREFCNT_dec(PL_main_cv);
781 /* Tell PerlIO we are about to tear things apart in case
782 we have layers which are using resources that should
786 PerlIO_destruct(aTHX);
788 if (PL_sv_objcount) {
790 * Try to destruct global references. We do this first so that the
791 * destructors and destructees still exist. Some sv's might remain.
792 * Non-referenced objects are on their own.
796 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
797 PL_defoutgv = NULL; /* may have been freed */
800 /* unhook hooks which will soon be, or use, destroyed data */
801 SvREFCNT_dec(PL_warnhook);
803 SvREFCNT_dec(PL_diehook);
806 /* call exit list functions */
807 while (PL_exitlistlen-- > 0)
808 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
810 Safefree(PL_exitlist);
815 /* jettison our possibly duplicated environment */
816 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
817 * so we certainly shouldn't free it here
820 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
821 if (environ != PL_origenviron && !PL_use_safe_putenv
823 /* only main thread can free environ[0] contents */
824 && PL_curinterp == aTHX
830 for (i = 0; environ[i]; i++)
831 safesysfree(environ[i]);
833 /* Must use safesysfree() when working with environ. */
834 safesysfree(environ);
836 environ = PL_origenviron;
839 #endif /* !PERL_MICRO */
841 if (destruct_level == 0) {
843 DEBUG_P(debprofdump());
845 #if defined(PERLIO_LAYERS)
846 /* No more IO - including error messages ! */
847 PerlIO_cleanup(aTHX);
850 CopFILE_free(&PL_compiling);
851 CopSTASH_free(&PL_compiling);
853 /* The exit() function will do everything that needs doing. */
857 /* reset so print() ends up where we expect */
861 /* the syntax tree is shared between clones
862 * so op_free(PL_main_root) only ReREFCNT_dec's
863 * REGEXPs in the parent interpreter
864 * we need to manually ReREFCNT_dec for the clones
867 I32 i = AvFILLp(PL_regex_padav) + 1;
868 SV * const * const ary = AvARRAY(PL_regex_padav);
871 SV * const resv = ary[--i];
873 if (SvFLAGS(resv) & SVf_BREAK) {
874 /* this is PL_reg_curpm, already freed
875 * flag is set in regexec.c:S_regtry
877 SvFLAGS(resv) &= ~SVf_BREAK;
879 else if(SvREPADTMP(resv)) {
880 SvREPADTMP_off(resv);
882 else if(SvIOKp(resv)) {
883 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
888 SvREFCNT_dec(PL_regex_padav);
889 PL_regex_padav = NULL;
893 SvREFCNT_dec((SV*) PL_stashcache);
894 PL_stashcache = NULL;
896 /* loosen bonds of global variables */
898 /* XXX can PL_parser still be non-null here? */
899 if(PL_parser && PL_parser->rsfp) {
900 (void)PerlIO_close(PL_parser->rsfp);
901 PL_parser->rsfp = NULL;
905 Safefree(PL_splitstr);
910 PL_preprocess = FALSE;
916 PL_doswitches = FALSE;
917 PL_dowarn = G_WARN_OFF;
918 PL_doextract = FALSE;
919 PL_sawampersand = FALSE; /* must save all match strings */
922 Safefree(PL_inplace);
924 SvREFCNT_dec(PL_patchlevel);
927 SvREFCNT_dec(PL_e_script);
933 /* magical thingies */
935 SvREFCNT_dec(PL_ofs_sv); /* $, */
938 SvREFCNT_dec(PL_ors_sv); /* $\ */
941 SvREFCNT_dec(PL_rs); /* $/ */
944 Safefree(PL_osname); /* $^O */
947 SvREFCNT_dec(PL_statname);
951 /* defgv, aka *_ should be taken care of elsewhere */
953 /* clean up after study() */
954 SvREFCNT_dec(PL_lastscream);
955 PL_lastscream = NULL;
956 Safefree(PL_screamfirst);
958 Safefree(PL_screamnext);
962 Safefree(PL_efloatbuf);
966 /* startup and shutdown function lists */
967 SvREFCNT_dec(PL_beginav);
968 SvREFCNT_dec(PL_beginav_save);
969 SvREFCNT_dec(PL_endav);
970 SvREFCNT_dec(PL_checkav);
971 SvREFCNT_dec(PL_checkav_save);
972 SvREFCNT_dec(PL_unitcheckav);
973 SvREFCNT_dec(PL_unitcheckav_save);
974 SvREFCNT_dec(PL_initav);
976 PL_beginav_save = NULL;
979 PL_checkav_save = NULL;
980 PL_unitcheckav = NULL;
981 PL_unitcheckav_save = NULL;
984 /* shortcuts just get cleared */
993 PL_last_in_gv = NULL;
1005 SvREFCNT_dec(PL_argvout_stack);
1006 PL_argvout_stack = NULL;
1008 SvREFCNT_dec(PL_modglobal);
1009 PL_modglobal = NULL;
1010 SvREFCNT_dec(PL_preambleav);
1011 PL_preambleav = NULL;
1012 SvREFCNT_dec(PL_subname);
1014 #ifdef PERL_USES_PL_PIDSTATUS
1015 SvREFCNT_dec(PL_pidstatus);
1016 PL_pidstatus = NULL;
1018 SvREFCNT_dec(PL_toptarget);
1019 PL_toptarget = NULL;
1020 SvREFCNT_dec(PL_bodytarget);
1021 PL_bodytarget = NULL;
1022 PL_formtarget = NULL;
1024 /* free locale stuff */
1025 #ifdef USE_LOCALE_COLLATE
1026 Safefree(PL_collation_name);
1027 PL_collation_name = NULL;
1030 #ifdef USE_LOCALE_NUMERIC
1031 Safefree(PL_numeric_name);
1032 PL_numeric_name = NULL;
1033 SvREFCNT_dec(PL_numeric_radix_sv);
1034 PL_numeric_radix_sv = NULL;
1037 /* clear utf8 character classes */
1038 SvREFCNT_dec(PL_utf8_alnum);
1039 SvREFCNT_dec(PL_utf8_alnumc);
1040 SvREFCNT_dec(PL_utf8_ascii);
1041 SvREFCNT_dec(PL_utf8_alpha);
1042 SvREFCNT_dec(PL_utf8_space);
1043 SvREFCNT_dec(PL_utf8_cntrl);
1044 SvREFCNT_dec(PL_utf8_graph);
1045 SvREFCNT_dec(PL_utf8_digit);
1046 SvREFCNT_dec(PL_utf8_upper);
1047 SvREFCNT_dec(PL_utf8_lower);
1048 SvREFCNT_dec(PL_utf8_print);
1049 SvREFCNT_dec(PL_utf8_punct);
1050 SvREFCNT_dec(PL_utf8_xdigit);
1051 SvREFCNT_dec(PL_utf8_mark);
1052 SvREFCNT_dec(PL_utf8_toupper);
1053 SvREFCNT_dec(PL_utf8_totitle);
1054 SvREFCNT_dec(PL_utf8_tolower);
1055 SvREFCNT_dec(PL_utf8_tofold);
1056 SvREFCNT_dec(PL_utf8_idstart);
1057 SvREFCNT_dec(PL_utf8_idcont);
1058 PL_utf8_alnum = NULL;
1059 PL_utf8_alnumc = NULL;
1060 PL_utf8_ascii = NULL;
1061 PL_utf8_alpha = NULL;
1062 PL_utf8_space = NULL;
1063 PL_utf8_cntrl = NULL;
1064 PL_utf8_graph = NULL;
1065 PL_utf8_digit = NULL;
1066 PL_utf8_upper = NULL;
1067 PL_utf8_lower = NULL;
1068 PL_utf8_print = NULL;
1069 PL_utf8_punct = NULL;
1070 PL_utf8_xdigit = NULL;
1071 PL_utf8_mark = NULL;
1072 PL_utf8_toupper = NULL;
1073 PL_utf8_totitle = NULL;
1074 PL_utf8_tolower = NULL;
1075 PL_utf8_tofold = NULL;
1076 PL_utf8_idstart = NULL;
1077 PL_utf8_idcont = NULL;
1079 if (!specialWARN(PL_compiling.cop_warnings))
1080 PerlMemShared_free(PL_compiling.cop_warnings);
1081 PL_compiling.cop_warnings = NULL;
1082 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1083 PL_compiling.cop_hints_hash = NULL;
1084 CopFILE_free(&PL_compiling);
1085 CopSTASH_free(&PL_compiling);
1087 /* Prepare to destruct main symbol table. */
1092 SvREFCNT_dec(PL_curstname);
1093 PL_curstname = NULL;
1095 /* clear queued errors */
1096 SvREFCNT_dec(PL_errors);
1099 SvREFCNT_dec(PL_isarev);
1102 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1103 if (PL_scopestack_ix != 0)
1104 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1105 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1106 (long)PL_scopestack_ix);
1107 if (PL_savestack_ix != 0)
1108 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1109 "Unbalanced saves: %ld more saves than restores\n",
1110 (long)PL_savestack_ix);
1111 if (PL_tmps_floor != -1)
1112 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1113 (long)PL_tmps_floor + 1);
1114 if (cxstack_ix != -1)
1115 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1116 (long)cxstack_ix + 1);
1119 /* Now absolutely destruct everything, somehow or other, loops or no. */
1120 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1121 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1123 /* the 2 is for PL_fdpid and PL_strtab */
1124 while (PL_sv_count > 2 && sv_clean_all())
1127 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1128 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1129 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1130 SvFLAGS(PL_strtab) |= SVt_PVHV;
1132 AvREAL_off(PL_fdpid); /* no surviving entries */
1133 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1136 #ifdef HAVE_INTERP_INTERN
1140 /* Destruct the global string table. */
1142 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1143 * so that sv_free() won't fail on them.
1144 * Now that the global string table is using a single hunk of memory
1145 * for both HE and HEK, we either need to explicitly unshare it the
1146 * correct way, or actually free things here.
1149 const I32 max = HvMAX(PL_strtab);
1150 HE * const * const array = HvARRAY(PL_strtab);
1151 HE *hent = array[0];
1154 if (hent && ckWARN_d(WARN_INTERNAL)) {
1155 HE * const next = HeNEXT(hent);
1156 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1157 "Unbalanced string table refcount: (%ld) for \"%s\"",
1158 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1165 hent = array[riter];
1170 HvARRAY(PL_strtab) = 0;
1171 HvTOTALKEYS(PL_strtab) = 0;
1172 HvFILL(PL_strtab) = 0;
1174 SvREFCNT_dec(PL_strtab);
1177 /* free the pointer tables used for cloning */
1178 ptr_table_free(PL_ptr_table);
1179 PL_ptr_table = (PTR_TBL_t*)NULL;
1182 /* free special SVs */
1184 SvREFCNT(&PL_sv_yes) = 0;
1185 sv_clear(&PL_sv_yes);
1186 SvANY(&PL_sv_yes) = NULL;
1187 SvFLAGS(&PL_sv_yes) = 0;
1189 SvREFCNT(&PL_sv_no) = 0;
1190 sv_clear(&PL_sv_no);
1191 SvANY(&PL_sv_no) = NULL;
1192 SvFLAGS(&PL_sv_no) = 0;
1196 for (i=0; i<=2; i++) {
1197 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1198 sv_clear(PERL_DEBUG_PAD(i));
1199 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1200 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1204 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1205 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1207 #ifdef DEBUG_LEAKING_SCALARS
1208 if (PL_sv_count != 0) {
1213 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1214 svend = &sva[SvREFCNT(sva)];
1215 for (sv = sva + 1; sv < svend; ++sv) {
1216 if (SvTYPE(sv) != SVTYPEMASK) {
1217 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1219 " refcnt=%"UVuf pTHX__FORMAT "\n"
1220 "\tallocated at %s:%d %s %s%s\n",
1221 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1222 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1224 sv->sv_debug_inpad ? "for" : "by",
1225 sv->sv_debug_optype ?
1226 PL_op_name[sv->sv_debug_optype]: "(none)",
1227 sv->sv_debug_cloned ? " (cloned)" : ""
1229 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1230 Perl_dump_sv_child(aTHX_ sv);
1236 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1240 /* Wait for up to 4 seconds for child to terminate.
1241 This seems to be the least effort way of timing out on reaping
1243 struct timeval waitfor = {4, 0};
1244 int sock = PL_dumper_fd;
1248 FD_SET(sock, &rset);
1249 select(sock + 1, &rset, NULL, NULL, &waitfor);
1250 waitpid(child, &status, WNOHANG);
1257 #ifdef PERL_DEBUG_READONLY_OPS
1263 #if defined(PERLIO_LAYERS)
1264 /* No more IO - including error messages ! */
1265 PerlIO_cleanup(aTHX);
1268 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1269 as currently layers use it rather than NULL as a marker
1270 for no arg - and will try and SvREFCNT_dec it.
1272 SvREFCNT(&PL_sv_undef) = 0;
1273 SvREADONLY_off(&PL_sv_undef);
1275 Safefree(PL_origfilename);
1276 PL_origfilename = NULL;
1277 Safefree(PL_reg_start_tmp);
1278 PL_reg_start_tmp = (char**)NULL;
1279 PL_reg_start_tmpl = 0;
1280 Safefree(PL_reg_curpm);
1281 Safefree(PL_reg_poscache);
1282 free_tied_hv_pool();
1283 Safefree(PL_op_mask);
1284 Safefree(PL_psig_ptr);
1285 PL_psig_ptr = (SV**)NULL;
1286 Safefree(PL_psig_name);
1287 PL_psig_name = (SV**)NULL;
1288 Safefree(PL_bitcount);
1290 Safefree(PL_psig_pend);
1291 PL_psig_pend = (int*)NULL;
1294 PL_tainting = FALSE;
1295 PL_taint_warn = FALSE;
1296 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1299 DEBUG_P(debprofdump());
1301 #ifdef USE_REENTRANT_API
1302 Perl_reentrant_free(aTHX);
1307 while (PL_regmatch_slab) {
1308 regmatch_slab *s = PL_regmatch_slab;
1309 PL_regmatch_slab = PL_regmatch_slab->next;
1313 /* As the absolutely last thing, free the non-arena SV for mess() */
1316 /* we know that type == SVt_PVMG */
1318 /* it could have accumulated taint magic */
1321 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1322 moremagic = mg->mg_moremagic;
1323 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1325 Safefree(mg->mg_ptr);
1329 /* we know that type >= SVt_PV */
1330 SvPV_free(PL_mess_sv);
1331 Safefree(SvANY(PL_mess_sv));
1332 Safefree(PL_mess_sv);
1339 =for apidoc perl_free
1341 Releases a Perl interpreter. See L<perlembed>.
1351 if (PL_veto_cleanup)
1354 #ifdef PERL_TRACK_MEMPOOL
1357 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1358 * value as we're probably hunting memory leaks then
1360 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1361 if (!s || atoi(s) == 0) {
1362 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1363 thread at thread exit. */
1364 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1365 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1370 #if defined(WIN32) || defined(NETWARE)
1371 # if defined(PERL_IMPLICIT_SYS)
1374 void *host = nw_internal_host;
1376 void *host = w32_internal_host;
1378 PerlMem_free(aTHXx);
1380 nw_delete_internal_host(host);
1382 win32_delete_internal_host(host);
1386 PerlMem_free(aTHXx);
1389 PerlMem_free(aTHXx);
1393 #if defined(USE_ITHREADS)
1394 /* provide destructors to clean up the thread key when libperl is unloaded */
1395 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1397 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1398 #pragma fini "perl_fini"
1399 #elif defined(__sun) && !defined(__GNUC__)
1400 #pragma fini (perl_fini)
1404 #if defined(__GNUC__)
1405 __attribute__((destructor))
1410 if (PL_curinterp && !PL_veto_cleanup)
1415 #endif /* THREADS */
1418 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1421 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1422 PL_exitlist[PL_exitlistlen].fn = fn;
1423 PL_exitlist[PL_exitlistlen].ptr = ptr;
1427 #ifdef HAS_PROCSELFEXE
1428 /* This is a function so that we don't hold on to MAXPATHLEN
1429 bytes of stack longer than necessary
1432 S_procself_val(pTHX_ SV *sv, const char *arg0)
1434 char buf[MAXPATHLEN];
1435 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1437 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1438 includes a spurious NUL which will cause $^X to fail in system
1439 or backticks (this will prevent extensions from being built and
1440 many tests from working). readlink is not meant to add a NUL.
1441 Normal readlink works fine.
1443 if (len > 0 && buf[len-1] == '\0') {
1447 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1448 returning the text "unknown" from the readlink rather than the path
1449 to the executable (or returning an error from the readlink). Any valid
1450 path has a '/' in it somewhere, so use that to validate the result.
1451 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1453 if (len > 0 && memchr(buf, '/', len)) {
1454 sv_setpvn(sv,buf,len);
1460 #endif /* HAS_PROCSELFEXE */
1463 S_set_caret_X(pTHX) {
1465 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1467 #ifdef HAS_PROCSELFEXE
1468 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1471 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1473 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1480 =for apidoc perl_parse
1482 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1488 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1495 PERL_UNUSED_ARG(my_perl);
1497 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1500 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1501 setuid perl scripts securely.\n");
1502 #endif /* IAMSUID */
1505 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1506 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1507 * This MUST be done before any hash stores or fetches take place.
1508 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1509 * yourself, it is your responsibility to provide a good random seed!
1510 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1511 if (!PL_rehash_seed_set)
1512 PL_rehash_seed = get_hash_seed();
1514 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1516 if (s && (atoi(s) == 1))
1517 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1519 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1524 if (PL_origalen != 0) {
1525 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1528 /* Set PL_origalen be the sum of the contiguous argv[]
1529 * elements plus the size of the env in case that it is
1530 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1531 * as the maximum modifiable length of $0. In the worst case
1532 * the area we are able to modify is limited to the size of
1533 * the original argv[0]. (See below for 'contiguous', though.)
1535 const char *s = NULL;
1538 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1539 /* Do the mask check only if the args seem like aligned. */
1541 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1543 /* See if all the arguments are contiguous in memory. Note
1544 * that 'contiguous' is a loose term because some platforms
1545 * align the argv[] and the envp[]. If the arguments look
1546 * like non-aligned, assume that they are 'strictly' or
1547 * 'traditionally' contiguous. If the arguments look like
1548 * aligned, we just check that they are within aligned
1549 * PTRSIZE bytes. As long as no system has something bizarre
1550 * like the argv[] interleaved with some other data, we are
1551 * fine. (Did I just evoke Murphy's Law?) --jhi */
1552 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1554 for (i = 1; i < PL_origargc; i++) {
1555 if ((PL_origargv[i] == s + 1
1557 || PL_origargv[i] == s + 2
1562 (PL_origargv[i] > s &&
1564 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1575 #ifndef PERL_USE_SAFE_PUTENV
1576 /* Can we grab env area too to be used as the area for $0? */
1577 if (s && PL_origenviron && !PL_use_safe_putenv) {
1578 if ((PL_origenviron[0] == s + 1)
1581 (PL_origenviron[0] > s &&
1582 PL_origenviron[0] <=
1583 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1586 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1587 s = PL_origenviron[0];
1590 my_setenv("NoNe SuCh", NULL);
1591 /* Force copy of environment. */
1592 for (i = 1; PL_origenviron[i]; i++) {
1593 if (PL_origenviron[i] == s + 1
1596 (PL_origenviron[i] > s &&
1597 PL_origenviron[i] <=
1598 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1601 s = PL_origenviron[i];
1609 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1611 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1616 /* Come here if running an undumped a.out. */
1618 PL_origfilename = savepv(argv[0]);
1619 PL_do_undump = FALSE;
1620 cxstack_ix = -1; /* start label stack again */
1622 assert (!PL_tainted);
1624 S_set_caret_X(aTHX);
1626 init_postdump_symbols(argc,argv,env);
1631 op_free(PL_main_root);
1632 PL_main_root = NULL;
1634 PL_main_start = NULL;
1635 SvREFCNT_dec(PL_main_cv);
1639 oldscope = PL_scopestack_ix;
1640 PL_dowarn = G_WARN_OFF;
1645 parse_body(env,xsinit);
1647 call_list(oldscope, PL_unitcheckav);
1649 call_list(oldscope, PL_checkav);
1656 /* my_exit() was called */
1657 while (PL_scopestack_ix > oldscope)
1660 PL_curstash = PL_defstash;
1662 call_list(oldscope, PL_unitcheckav);
1664 call_list(oldscope, PL_checkav);
1668 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1677 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1681 int argc = PL_origargc;
1682 char **argv = PL_origargv;
1683 const char *scriptname = NULL;
1684 VOL bool dosearch = FALSE;
1685 const char *validarg = "";
1687 register char *s, c;
1688 const char *cddir = NULL;
1689 #ifdef USE_SITECUSTOMIZE
1690 bool minus_f = FALSE;
1692 SV *linestr_sv = newSV_type(SVt_PVIV);
1693 bool add_read_e_script = FALSE;
1695 SvGROW(linestr_sv, 80);
1696 sv_setpvn(linestr_sv,"",0);
1698 sv = newSVpvs(""); /* first used for -I flags */
1702 for (argc--,argv++; argc > 0; argc--,argv++) {
1703 if (argv[0][0] != '-' || !argv[0][1])
1707 validarg = " PHOOEY ";
1711 * Can we rely on the kernel to start scripts with argv[1] set to
1712 * contain all #! line switches (the whole line)? (argv[0] is set to
1713 * the interpreter name, argv[2] to the script name; argv[3] and
1714 * above may contain other arguments.)
1721 #ifndef PERL_STRICT_CR
1745 if ((s = moreswitches(s)))
1750 CHECK_MALLOC_TOO_LATE_FOR('t');
1751 if( !PL_tainting ) {
1752 PL_taint_warn = TRUE;
1758 CHECK_MALLOC_TOO_LATE_FOR('T');
1760 PL_taint_warn = FALSE;
1768 #ifdef MACOS_TRADITIONAL
1769 /* ignore -e for Dev:Pseudo argument */
1770 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1773 forbid_setid('e', -1);
1775 PL_e_script = newSVpvs("");
1776 add_read_e_script = TRUE;
1779 sv_catpv(PL_e_script, s);
1781 sv_catpv(PL_e_script, argv[1]);
1785 Perl_croak(aTHX_ "No code specified for -%c", c);
1786 sv_catpvs(PL_e_script, "\n");
1790 #ifdef USE_SITECUSTOMIZE
1796 case 'I': /* -I handled both here and in moreswitches() */
1797 forbid_setid('I', -1);
1798 if (!*++s && (s=argv[1]) != NULL) {
1802 STRLEN len = strlen(s);
1803 const char * const p = savepvn(s, len);
1804 incpush(p, TRUE, TRUE, FALSE, FALSE);
1805 sv_catpvs(sv, "-I");
1806 sv_catpvn(sv, p, len);
1811 Perl_croak(aTHX_ "No directory specified for -I");
1814 forbid_setid('P', -1);
1815 PL_preprocess = TRUE;
1820 forbid_setid('S', -1);
1828 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1830 /* Can't do newSVpvs() as that would involve pre-processor
1831 condititionals inside a macro expansion. */
1832 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1839 # ifdef PERL_DONT_CREATE_GVSV
1840 " PERL_DONT_CREATE_GVSV"
1842 # ifdef PERL_MALLOC_WRAP
1845 # ifdef PERL_MEM_LOG
1848 # ifdef PERL_MEM_LOG_ENV
1851 # ifdef PERL_MEM_LOG_ENV_FD
1852 " PERL_MEM_LOG_ENV_FD"
1854 # ifdef PERL_MEM_LOG_STDERR
1855 " PERL_MEM_LOG_STDERR"
1857 # ifdef PERL_MEM_LOG_TIMESTAMP
1858 " PERL_MEM_LOG_TIMESTAMP"
1860 # ifdef PERL_USE_SAFE_PUTENV
1861 " PERL_USE_SAFE_PUTENV"
1863 # ifdef USE_SITECUSTOMIZE
1864 " USE_SITECUSTOMIZE"
1868 sv_catpv(opts_prog, PL_bincompat_options);
1869 /* Terminate the qw(, and then wrap at 76 columns. */
1870 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1872 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1874 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1877 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1879 #if defined(LOCAL_PATCH_COUNT)
1880 if (LOCAL_PATCH_COUNT > 0) {
1882 sv_catpvs(opts_prog,
1883 "\" Locally applied patches:\\n\",");
1884 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1885 if (PL_localpatches[i])
1886 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1887 0, PL_localpatches[i], 0);
1891 Perl_sv_catpvf(aTHX_ opts_prog,
1892 "\" Built under %s\\n",OSNAME);
1895 Perl_sv_catpvf(aTHX_ opts_prog,
1896 " Compiled at %s %s\\n\"",__DATE__,
1899 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1903 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1904 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1905 "sort grep {/^PERL/} keys %ENV; ");
1907 sv_catpvs(opts_prog,
1908 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1910 sv_catpvs(opts_prog,
1911 "print \" \\%ENV:\\n @env\\n\" if @env;"
1912 "print \" \\@INC:\\n @INC\\n\";");
1916 opts_prog = Perl_newSVpvf(aTHX_
1917 "Config::config_vars(qw%c%s%c)",
1921 av_push(PL_preambleav, opts_prog);
1922 /* don't look for script or read stdin */
1923 scriptname = BIT_BUCKET;
1927 PL_doextract = TRUE;
1935 if (!*++s || isSPACE(*s)) {
1939 /* catch use of gnu style long options */
1940 if (strEQ(s, "version")) {
1944 if (strEQ(s, "help")) {
1951 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1957 #ifndef SECURE_INTERNAL_GETENV
1960 (s = PerlEnv_getenv("PERL5OPT")))
1962 const char *popt = s;
1965 if (*s == '-' && *(s+1) == 'T') {
1966 CHECK_MALLOC_TOO_LATE_FOR('T');
1968 PL_taint_warn = FALSE;
1971 char *popt_copy = NULL;
1984 if (!strchr("CDIMUdmtwA", *s))
1985 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1989 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1990 s = popt_copy + (s - popt);
1991 d = popt_copy + (d - popt);
1998 if( !PL_tainting ) {
1999 PL_taint_warn = TRUE;
2009 #ifdef USE_SITECUSTOMIZE
2011 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2012 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2017 scriptname = argv[0];
2020 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2022 else if (scriptname == NULL) {
2024 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2030 /* Set $^X early so that it can be used for relocatable paths in @INC */
2031 assert (!PL_tainted);
2033 S_set_caret_X(aTHX);
2040 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2042 validate_suid(validarg, scriptname, fdscript, suidscript,
2046 # if defined(SIGCHLD) || defined(SIGCLD)
2049 # define SIGCHLD SIGCLD
2051 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2052 if (sigstate == (Sighandler_t) SIG_IGN) {
2053 if (ckWARN(WARN_SIGNAL))
2054 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2055 "Can't ignore signal CHLD, forcing to default");
2056 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2063 #ifdef MACOS_TRADITIONAL
2064 || gMacPerl_AlwaysExtract
2068 /* This will croak if suidscript is >= 0, as -x cannot be used with
2070 forbid_setid('x', suidscript);
2071 /* Hence you can't get here if suidscript >= 0 */
2073 find_beginning(linestr_sv, rsfp);
2074 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2075 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2079 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2080 CvUNIQUE_on(PL_compcv);
2082 CvPADLIST(PL_compcv) = pad_new(0);
2084 PL_isarev = newHV();
2087 boot_core_UNIVERSAL();
2088 boot_core_xsutils();
2092 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2094 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2100 # ifdef HAS_SOCKS5_INIT
2101 socks5_init(argv[0]);
2107 init_predump_symbols();
2108 /* init_postdump_symbols not currently designed to be called */
2109 /* more than once (ENV isn't cleared first, for example) */
2110 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2112 init_postdump_symbols(argc,argv,env);
2114 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2115 * or explicitly in some platforms.
2116 * locale.c:Perl_init_i18nl10n() if the environment
2117 * look like the user wants to use UTF-8. */
2118 #if defined(__SYMBIAN32__)
2119 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2122 /* Requires init_predump_symbols(). */
2123 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2128 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2129 * and the default open disciplines. */
2130 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2131 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2133 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2134 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2135 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2137 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2138 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2139 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2141 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2142 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2143 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2145 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2146 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2149 sv_setpvn(sv, ":utf8\0:utf8", 11);
2151 sv_setpvn(sv, ":utf8\0", 6);
2154 sv_setpvn(sv, "\0:utf8", 6);
2160 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2161 if (strEQ(s, "unsafe"))
2162 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2163 else if (strEQ(s, "safe"))
2164 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2166 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2170 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2174 PL_xmlfp = PerlIO_stdout();
2176 PL_xmlfp = PerlIO_open(s, "w");
2178 Perl_croak(aTHX_ "Can't open %s", s);
2180 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2182 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2183 PL_madskills = atoi(s);
2184 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2188 lex_start(linestr_sv, rsfp, TRUE);
2189 PL_subname = newSVpvs("main");
2191 if (add_read_e_script)
2192 filter_add(read_e_script, NULL);
2194 /* now parse the script */
2196 SETERRNO(0,SS_NORMAL);
2197 #ifdef MACOS_TRADITIONAL
2198 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2200 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2202 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2203 MacPerl_MPWFileName(PL_origfilename));
2207 if (yyparse() || PL_parser->error_count) {
2209 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2211 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2216 CopLINE_set(PL_curcop, 0);
2217 PL_curstash = PL_defstash;
2218 PL_preprocess = FALSE;
2220 SvREFCNT_dec(PL_e_script);
2228 SAVECOPFILE(PL_curcop);
2229 SAVECOPLINE(PL_curcop);
2230 gv_check(PL_defstash);
2237 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2238 dump_mstats("after compilation:");
2247 =for apidoc perl_run
2249 Tells a Perl interpreter to run. See L<perlembed>.
2262 PERL_UNUSED_ARG(my_perl);
2264 oldscope = PL_scopestack_ix;
2272 cxstack_ix = -1; /* start context stack again */
2274 case 0: /* normal completion */
2278 case 2: /* my_exit() */
2279 while (PL_scopestack_ix > oldscope)
2282 PL_curstash = PL_defstash;
2283 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2284 PL_endav && !PL_minus_c)
2285 call_list(oldscope, PL_endav);
2287 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2288 dump_mstats("after execution: ");
2294 POPSTACK_TO(PL_mainstack);
2297 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2308 S_run_body(pTHX_ I32 oldscope)
2311 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2312 PL_sawampersand ? "Enabling" : "Omitting"));
2314 if (!PL_restartop) {
2318 exit(0); /* less likely to core dump than my_exit(0) */
2321 DEBUG_x(dump_all());
2324 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2326 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2330 #ifdef MACOS_TRADITIONAL
2331 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2332 (gMacPerl_ErrorFormat ? "# " : ""),
2333 MacPerl_MPWFileName(PL_origfilename));
2335 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2339 if (PERLDB_SINGLE && PL_DBsingle)
2340 sv_setiv(PL_DBsingle, 1);
2342 call_list(oldscope, PL_initav);
2343 #ifdef PERL_DEBUG_READONLY_OPS
2344 Perl_pending_Slabs_to_ro(aTHX);
2351 PL_op = PL_restartop;
2355 else if (PL_main_start) {
2356 CvDEPTH(PL_main_cv) = 1;
2357 PL_op = PL_main_start;
2365 =head1 SV Manipulation Functions
2367 =for apidoc p||get_sv
2369 Returns the SV of the specified Perl scalar. If C<create> is set and the
2370 Perl variable does not exist then it will be created. If C<create> is not
2371 set and the variable does not exist then NULL is returned.
2377 Perl_get_sv(pTHX_ const char *name, I32 create)
2380 gv = gv_fetchpv(name, create, SVt_PV);
2387 =head1 Array Manipulation Functions
2389 =for apidoc p||get_av
2391 Returns the AV of the specified Perl array. If C<create> is set and the
2392 Perl variable does not exist then it will be created. If C<create> is not
2393 set and the variable does not exist then NULL is returned.
2399 Perl_get_av(pTHX_ const char *name, I32 create)
2401 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2410 =head1 Hash Manipulation Functions
2412 =for apidoc p||get_hv
2414 Returns the HV of the specified Perl hash. If C<create> is set and the
2415 Perl variable does not exist then it will be created. If C<create> is not
2416 set and the variable does not exist then NULL is returned.
2422 Perl_get_hv(pTHX_ const char *name, I32 create)
2424 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2433 =head1 CV Manipulation Functions
2435 =for apidoc p||get_cvn_flags
2437 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2438 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2439 exist then it will be declared (which has the same effect as saying
2440 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2441 then NULL is returned.
2443 =for apidoc p||get_cv
2445 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2451 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2453 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2454 /* XXX this is probably not what they think they're getting.
2455 * It has the same effect as "sub name;", i.e. just a forward
2457 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2458 SV *const sv = newSVpvn(name,len);
2459 SvFLAGS(sv) |= flags & SVf_UTF8;
2460 return newSUB(start_subparse(FALSE, 0),
2461 newSVOP(OP_CONST, 0, sv),
2470 Perl_get_cv(pTHX_ const char *name, I32 flags)
2472 return get_cvn_flags(name, strlen(name), flags);
2475 /* Be sure to refetch the stack pointer after calling these routines. */
2479 =head1 Callback Functions
2481 =for apidoc p||call_argv
2483 Performs a callback to the specified Perl sub. See L<perlcall>.
2489 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2491 /* See G_* flags in cop.h */
2492 /* null terminated arg list */
2500 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2505 return call_pv(sub_name, flags);
2509 =for apidoc p||call_pv
2511 Performs a callback to the specified Perl sub. See L<perlcall>.
2517 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2518 /* name of the subroutine */
2519 /* See G_* flags in cop.h */
2521 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2525 =for apidoc p||call_method
2527 Performs a callback to the specified Perl method. The blessed object must
2528 be on the stack. See L<perlcall>.
2534 Perl_call_method(pTHX_ const char *methname, I32 flags)
2535 /* name of the subroutine */
2536 /* See G_* flags in cop.h */
2538 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2541 /* May be called with any of a CV, a GV, or an SV containing the name. */
2543 =for apidoc p||call_sv
2545 Performs a callback to the Perl sub whose name is in the SV. See
2552 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2553 /* See G_* flags in cop.h */
2556 LOGOP myop; /* fake syntax tree node */
2561 bool oldcatch = CATCH_GET;
2563 OP* const oldop = PL_op;
2566 if (flags & G_DISCARD) {
2571 Zero(&myop, 1, LOGOP);
2572 myop.op_next = NULL;
2573 if (!(flags & G_NOARGS))
2574 myop.op_flags |= OPf_STACKED;
2575 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2576 (flags & G_ARRAY) ? OPf_WANT_LIST :
2581 EXTEND(PL_stack_sp, 1);
2582 *++PL_stack_sp = sv;
2584 oldscope = PL_scopestack_ix;
2586 if (PERLDB_SUB && PL_curstash != PL_debstash
2587 /* Handle first BEGIN of -d. */
2588 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2589 /* Try harder, since this may have been a sighandler, thus
2590 * curstash may be meaningless. */
2591 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2592 && !(flags & G_NODEBUG))
2593 PL_op->op_private |= OPpENTERSUB_DB;
2595 if (flags & G_METHOD) {
2596 Zero(&method_op, 1, UNOP);
2597 method_op.op_next = PL_op;
2598 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2599 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2600 PL_op = (OP*)&method_op;
2603 if (!(flags & G_EVAL)) {
2605 CALL_BODY_SUB((OP*)&myop);
2606 retval = PL_stack_sp - (PL_stack_base + oldmark);
2607 CATCH_SET(oldcatch);
2610 myop.op_other = (OP*)&myop;
2612 create_eval_scope(flags|G_FAKINGEVAL);
2620 CALL_BODY_SUB((OP*)&myop);
2621 retval = PL_stack_sp - (PL_stack_base + oldmark);
2622 if (!(flags & G_KEEPERR))
2623 sv_setpvn(ERRSV,"",0);
2629 /* my_exit() was called */
2630 PL_curstash = PL_defstash;
2633 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2634 Perl_croak(aTHX_ "Callback called exit");
2639 PL_op = PL_restartop;
2643 PL_stack_sp = PL_stack_base + oldmark;
2644 if (flags & G_ARRAY)
2648 *++PL_stack_sp = &PL_sv_undef;
2653 if (PL_scopestack_ix > oldscope)
2654 delete_eval_scope();
2658 if (flags & G_DISCARD) {
2659 PL_stack_sp = PL_stack_base + oldmark;
2668 /* Eval a string. The G_EVAL flag is always assumed. */
2671 =for apidoc p||eval_sv
2673 Tells Perl to C<eval> the string in the SV.
2679 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2681 /* See G_* flags in cop.h */
2685 UNOP myop; /* fake syntax tree node */
2686 VOL I32 oldmark = SP - PL_stack_base;
2689 OP* const oldop = PL_op;
2692 if (flags & G_DISCARD) {
2699 Zero(PL_op, 1, UNOP);
2700 EXTEND(PL_stack_sp, 1);
2701 *++PL_stack_sp = sv;
2703 if (!(flags & G_NOARGS))
2704 myop.op_flags = OPf_STACKED;
2705 myop.op_next = NULL;
2706 myop.op_type = OP_ENTEREVAL;
2707 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2708 (flags & G_ARRAY) ? OPf_WANT_LIST :
2710 if (flags & G_KEEPERR)
2711 myop.op_flags |= OPf_SPECIAL;
2713 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2714 * before a PUSHEVAL, which corrupts the stack after a croak */
2715 TAINT_PROPER("eval_sv()");
2721 CALL_BODY_EVAL((OP*)&myop);
2722 retval = PL_stack_sp - (PL_stack_base + oldmark);
2723 if (!(flags & G_KEEPERR))
2724 sv_setpvn(ERRSV,"",0);
2730 /* my_exit() was called */
2731 PL_curstash = PL_defstash;
2734 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2735 Perl_croak(aTHX_ "Callback called exit");
2740 PL_op = PL_restartop;
2744 PL_stack_sp = PL_stack_base + oldmark;
2745 if (flags & G_ARRAY)
2749 *++PL_stack_sp = &PL_sv_undef;
2755 if (flags & G_DISCARD) {
2756 PL_stack_sp = PL_stack_base + oldmark;
2766 =for apidoc p||eval_pv
2768 Tells Perl to C<eval> the given string and return an SV* result.
2774 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2778 SV* sv = newSVpv(p, 0);
2780 eval_sv(sv, G_SCALAR);
2787 if (croak_on_error && SvTRUE(ERRSV)) {
2788 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2794 /* Require a module. */
2797 =head1 Embedding Functions
2799 =for apidoc p||require_pv
2801 Tells Perl to C<require> the file named by the string argument. It is
2802 analogous to the Perl code C<eval "require '$file'">. It's even
2803 implemented that way; consider using load_module instead.
2808 Perl_require_pv(pTHX_ const char *pv)
2813 PUSHSTACKi(PERLSI_REQUIRE);
2815 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2816 eval_sv(sv_2mortal(sv), G_DISCARD);
2822 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2824 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2827 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2831 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2833 /* This message really ought to be max 23 lines.
2834 * Removed -h because the user already knows that option. Others? */
2836 static const char * const usage_msg[] = {
2837 "-0[octal] specify record separator (\\0, if no argument)",
2838 "-a autosplit mode with -n or -p (splits $_ into @F)",
2839 "-C[number/list] enables the listed Unicode features",
2840 "-c check syntax only (runs BEGIN and CHECK blocks)",
2841 "-d[:debugger] run program under debugger",
2842 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2843 "-e program one line of program (several -e's allowed, omit programfile)",
2844 "-E program like -e, but enables all optional features",
2845 "-f don't do $sitelib/sitecustomize.pl at startup",
2846 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2847 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2848 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2849 "-l[octal] enable line ending processing, specifies line terminator",
2850 "-[mM][-]module execute \"use/no module...\" before executing program",
2851 "-n assume \"while (<>) { ... }\" loop around program",
2852 "-p assume loop like -n but print line also, like sed",
2853 "-P run program through C preprocessor before compilation",
2854 "-s enable rudimentary parsing for switches after programfile",
2855 "-S look for programfile using PATH environment variable",
2856 "-t enable tainting warnings",
2857 "-T enable tainting checks",
2858 "-u dump core after parsing program",
2859 "-U allow unsafe operations",
2860 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2861 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2862 "-w enable many useful warnings (RECOMMENDED)",
2863 "-W enable all warnings",
2864 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2865 "-X disable all warnings",
2869 const char * const *p = usage_msg;
2871 PerlIO_printf(PerlIO_stdout(),
2872 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2875 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2878 /* convert a string of -D options (or digits) into an int.
2879 * sets *s to point to the char after the options */
2883 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2885 static const char * const usage_msgd[] = {
2886 " Debugging flag values: (see also -d)",
2887 " p Tokenizing and parsing (with v, displays parse stack)",
2888 " s Stack snapshots (with v, displays all stacks)",
2889 " l Context (loop) stack processing",
2890 " t Trace execution",
2891 " o Method and overloading resolution",
2892 " c String/numeric conversions",
2893 " P Print profiling info, preprocessor command for -P, source file input state",
2894 " m Memory allocation",
2895 " f Format processing",
2896 " r Regular expression parsing and execution",
2897 " x Syntax tree dump",
2898 " u Tainting checks",
2899 " H Hash dump -- usurps values()",
2900 " X Scratchpad allocation",
2902 " S Thread synchronization",
2904 " R Include reference counts of dumped variables (eg when using -Ds)",
2905 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2906 " v Verbose: use in conjunction with other flags",
2908 " A Consistency checks on internal structures",
2909 " q quiet - currently only suppresses the 'EXECUTING' message",
2914 /* if adding extra options, remember to update DEBUG_MASK */
2915 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2917 for (; isALNUM(**s); (*s)++) {
2918 const char * const d = strchr(debopts,**s);
2920 i |= 1 << (d - debopts);
2921 else if (ckWARN_d(WARN_DEBUGGING))
2922 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2923 "invalid option -D%c, use -D'' to see choices\n", **s);
2926 else if (isDIGIT(**s)) {
2928 for (; isALNUM(**s); (*s)++) ;
2930 else if (givehelp) {
2931 const char *const *p = usage_msgd;
2932 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2935 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2936 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2937 "-Dp not implemented on this platform\n");
2943 /* This routine handles any switches that can be given during run */
2946 Perl_moreswitches(pTHX_ char *s)
2957 SvREFCNT_dec(PL_rs);
2958 if (s[1] == 'x' && s[2]) {
2959 const char *e = s+=2;
2965 flags = PERL_SCAN_SILENT_ILLDIGIT;
2966 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2967 if (s + numlen < e) {
2968 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2972 PL_rs = newSVpvs("");
2973 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2974 tmps = (U8*)SvPVX(PL_rs);
2975 uvchr_to_utf8(tmps, rschar);
2976 SvCUR_set(PL_rs, UNISKIP(rschar));
2981 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2982 if (rschar & ~((U8)~0))
2983 PL_rs = &PL_sv_undef;
2984 else if (!rschar && numlen >= 2)
2985 PL_rs = newSVpvs("");
2987 char ch = (char)rschar;
2988 PL_rs = newSVpvn(&ch, 1);
2991 sv_setsv(get_sv("/", TRUE), PL_rs);
2996 PL_unicode = parse_unicode_opts( (const char **)&s );
2997 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3003 while (*s && !isSPACE(*s)) ++s;
3004 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3015 forbid_setid('d', -1);
3018 /* -dt indicates to the debugger that threads will be used */
3019 if (*s == 't' && !isALNUM(s[1])) {
3021 my_setenv("PERL5DB_THREADED", "1");
3024 /* The following permits -d:Mod to accepts arguments following an =
3025 in the fashion that -MSome::Mod does. */
3026 if (*s == ':' || *s == '=') {
3028 SV * const sv = newSVpvs("use Devel::");
3030 /* We now allow -d:Module=Foo,Bar */
3031 while(isALNUM(*s) || *s==':') ++s;
3033 sv_catpv(sv, start);
3035 sv_catpvn(sv, start, s-start);
3036 /* Don't use NUL as q// delimiter here, this string goes in the
3038 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3041 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3044 PL_perldb = PERLDB_ALL;
3051 forbid_setid('D', -1);
3053 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3054 #else /* !DEBUGGING */
3055 if (ckWARN_d(WARN_DEBUGGING))
3056 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3057 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3058 for (s++; isALNUM(*s); s++) ;
3063 usage(PL_origargv[0]);
3066 Safefree(PL_inplace);
3067 #if defined(__CYGWIN__) /* do backup extension automagically */
3068 if (*(s+1) == '\0') {
3069 PL_inplace = savepvs(".bak");
3072 #endif /* __CYGWIN__ */
3074 const char * const start = ++s;
3075 while (*s && !isSPACE(*s))
3078 PL_inplace = savepvn(start, s - start);
3082 if (*s == '-') /* Additional switches on #! line. */
3086 case 'I': /* -I handled both here and in parse_body() */
3087 forbid_setid('I', -1);
3089 while (*s && isSPACE(*s))
3094 /* ignore trailing spaces (possibly followed by other switches) */
3096 for (e = p; *e && !isSPACE(*e); e++) ;
3100 } while (*p && *p != '-');
3101 e = savepvn(s, e-s);
3102 incpush(e, TRUE, TRUE, FALSE, FALSE);
3109 Perl_croak(aTHX_ "No directory specified for -I");
3115 SvREFCNT_dec(PL_ors_sv);
3121 PL_ors_sv = newSVpvs("\n");
3122 numlen = 3 + (*s == '0');
3123 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3127 if (RsPARA(PL_rs)) {
3128 PL_ors_sv = newSVpvs("\n\n");
3131 PL_ors_sv = newSVsv(PL_rs);
3136 forbid_setid('M', -1); /* XXX ? */
3139 forbid_setid('m', -1); /* XXX ? */
3143 const char *use = "use ";
3144 /* -M-foo == 'no foo' */
3145 /* Leading space on " no " is deliberate, to make both
3146 possibilities the same length. */
3147 if (*s == '-') { use = " no "; ++s; }
3148 sv = newSVpvn(use,4);
3150 /* We allow -M'Module qw(Foo Bar)' */
3151 while(isALNUM(*s) || *s==':') ++s;
3153 sv_catpv(sv, start);
3154 if (*(start-1) == 'm') {
3156 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3157 sv_catpvs( sv, " ()");
3161 Perl_croak(aTHX_ "Module name required with -%c option",
3163 sv_catpvn(sv, start, s-start);
3164 sv_catpvs(sv, " split(/,/,q");
3165 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3167 sv_catpvs(sv, "\0)");
3170 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3173 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3184 forbid_setid('s', -1);
3185 PL_doswitches = TRUE;
3199 #ifdef MACOS_TRADITIONAL
3200 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3202 PL_do_undump = TRUE;
3210 if (!sv_derived_from(PL_patchlevel, "version"))
3211 upg_version(PL_patchlevel, TRUE);
3213 PerlIO_printf(PerlIO_stdout(),
3214 Perl_form(aTHX_ "\nThis is perl, %"SVf
3215 #ifdef PERL_PATCHNUM
3216 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3219 SVfARG(vstringify(PL_patchlevel)),
3222 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3223 PerlIO_printf(PerlIO_stdout(),
3224 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3225 SVfARG(vstringify(PL_patchlevel))));
3226 PerlIO_printf(PerlIO_stdout(),
3227 Perl_form(aTHX_ " built under %s at %s %s\n",
3228 OSNAME, __DATE__, __TIME__));
3229 PerlIO_printf(PerlIO_stdout(),
3230 Perl_form(aTHX_ " OS Specific Release: %s\n",
3234 #if defined(LOCAL_PATCH_COUNT)
3235 if (LOCAL_PATCH_COUNT > 0)
3236 PerlIO_printf(PerlIO_stdout(),
3237 "\n(with %d registered patch%s, "
3238 "see perl -V for more detail)",
3240 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3243 PerlIO_printf(PerlIO_stdout(),
3244 "\n\nCopyright 1987-2007, Larry Wall\n");
3245 #ifdef MACOS_TRADITIONAL
3246 PerlIO_printf(PerlIO_stdout(),
3247 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3248 "maintained by Chris Nandor\n");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3257 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3262 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3265 PerlIO_printf(PerlIO_stdout(),
3266 "atariST series port, ++jrb bammi@cadence.com\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "MiNT port by Guido Flohr, 1997-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "EPOC port by Olaf Flebbe, 1999-2002\n");
3301 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3302 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3305 #ifdef __SYMBIAN32__
3306 PerlIO_printf(PerlIO_stdout(),
3307 "Symbian port by Nokia, 2004-2005\n");
3309 #ifdef BINARY_BUILD_NOTICE
3310 BINARY_BUILD_NOTICE;
3312 PerlIO_printf(PerlIO_stdout(),
3314 Perl may be copied only under the terms of either the Artistic License or the\n\
3315 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3316 Complete documentation for Perl, including FAQ lists, should be found on\n\
3317 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3318 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3321 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3322 PL_dowarn |= G_WARN_ON;
3327 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3328 if (!specialWARN(PL_compiling.cop_warnings))
3329 PerlMemShared_free(PL_compiling.cop_warnings);
3330 PL_compiling.cop_warnings = pWARN_ALL ;
3334 PL_dowarn = G_WARN_ALL_OFF;
3335 if (!specialWARN(PL_compiling.cop_warnings))
3336 PerlMemShared_free(PL_compiling.cop_warnings);
3337 PL_compiling.cop_warnings = pWARN_NONE ;
3342 if (s[1] == '-') /* Additional switches on #! line. */
3347 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3353 #ifdef ALTERNATE_SHEBANG
3354 case 'S': /* OS/2 needs -S on "extproc" line. */
3362 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3367 /* compliments of Tom Christiansen */
3369 /* unexec() can be found in the Gnu emacs distribution */
3370 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3373 Perl_my_unexec(pTHX)
3375 PERL_UNUSED_CONTEXT;
3377 SV * prog = newSVpv(BIN_EXP, 0);
3378 SV * file = newSVpv(PL_origfilename, 0);
3382 sv_catpvs(prog, "/perl");
3383 sv_catpvs(file, ".perldump");
3385 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3386 /* unexec prints msg to stderr in case of failure */
3387 PerlProc_exit(status);
3390 # include <lib$routines.h>
3391 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3392 # elif defined(WIN32) || defined(__CYGWIN__)
3393 Perl_croak(aTHX_ "dump is not supported");
3395 ABORT(); /* for use with undump */
3400 /* initialize curinterp */
3406 # define PERLVAR(var,type)
3407 # define PERLVARA(var,n,type)
3408 # if defined(PERL_IMPLICIT_CONTEXT)
3409 # define PERLVARI(var,type,init) aTHX->var = init;
3410 # define PERLVARIC(var,type,init) aTHX->var = init;
3412 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3413 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3415 # include "intrpvar.h"
3421 # define PERLVAR(var,type)
3422 # define PERLVARA(var,n,type)
3423 # define PERLVARI(var,type,init) PL_##var = init;
3424 # define PERLVARIC(var,type,init) PL_##var = init;
3425 # include "intrpvar.h"
3432 /* As these are inside a structure, PERLVARI isn't capable of initialising
3434 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3435 PL_reg_poscache = PL_reg_starttry = NULL;
3439 S_init_main_stash(pTHX)
3444 PL_curstash = PL_defstash = newHV();
3445 /* We know that the string "main" will be in the global shared string
3446 table, so it's a small saving to use it rather than allocate another
3448 PL_curstname = newSVpvs_share("main");
3449 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3450 /* If we hadn't caused another reference to "main" to be in the shared
3451 string table above, then it would be worth reordering these two,
3452 because otherwise all we do is delete "main" from it as a consequence
3453 of the SvREFCNT_dec, only to add it again with hv_name_set */
3454 SvREFCNT_dec(GvHV(gv));
3455 hv_name_set(PL_defstash, "main", 4, 0);
3456 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3458 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3460 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3461 GvMULTI_on(PL_incgv);
3462 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3463 GvMULTI_on(PL_hintgv);
3464 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3465 SvREFCNT_inc_simple_void(PL_defgv);
3466 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3467 SvREFCNT_inc_simple_void(PL_errgv);
3468 GvMULTI_on(PL_errgv);
3469 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3470 GvMULTI_on(PL_replgv);
3471 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3472 #ifdef PERL_DONT_CREATE_GVSV
3475 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3476 sv_setpvn(ERRSV, "", 0);
3477 PL_curstash = PL_defstash;
3478 CopSTASH_set(&PL_compiling, PL_defstash);
3479 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3480 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3482 /* We must init $/ before switches are processed. */
3483 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3487 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3488 int *suidscript, PerlIO **rsfpp)
3493 const char *cpp_discard_flag;
3502 PL_origfilename = savepvs("-e");
3505 /* if find_script() returns, it returns a malloc()-ed value */
3506 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3508 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3509 const char *s = scriptname + 8;
3515 * Tell apart "normal" usage of fdscript, e.g.
3516 * with bash on FreeBSD:
3517 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3518 * from usage in suidperl.
3519 * Does any "normal" usage leave garbage after the number???
3520 * Is it a mistake to use a similar /dev/fd/ construct for
3525 * Be supersafe and do some sanity-checks.
3526 * Still, can we be sure we got the right thing?
3529 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3532 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3534 scriptname = savepv(s + 1);
3535 Safefree(PL_origfilename);
3536 PL_origfilename = (char *)scriptname;
3541 CopFILE_free(PL_curcop);
3542 CopFILE_set(PL_curcop, PL_origfilename);
3543 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3544 scriptname = (char *)"";
3545 if (fdscript >= 0) {
3546 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3547 # if defined(HAS_FCNTL) && defined(F_SETFD)
3549 /* ensure close-on-exec */
3550 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3555 Perl_croak(aTHX_ "sperl needs fd script\n"
3556 "You should not call sperl directly; do you need to "
3557 "change a #! line\nfrom sperl to perl?\n");
3560 * Do not open (or do other fancy stuff) while setuid.
3561 * Perl does the open, and hands script to suidperl on a fd;
3562 * suidperl only does some checks, sets up UIDs and re-execs
3563 * perl with that fd as it has always done.
3566 if (*suidscript != 1) {
3567 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3570 else if (PL_preprocess) {
3571 const char * const cpp_cfg = CPPSTDIN;
3572 SV * const cpp = newSVpvs("");
3573 SV * const cmd = newSV(0);
3575 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3576 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3577 if (strEQ(cpp_cfg, "cppstdin"))
3578 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3579 sv_catpv(cpp, cpp_cfg);
3582 sv_catpvs(sv, "-I");
3583 sv_catpv(sv,PRIVLIB_EXP);
3586 DEBUG_P(PerlIO_printf(Perl_debug_log,
3587 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3588 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3591 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3598 cpp_discard_flag = "";
3600 cpp_discard_flag = "-C";
3604 perl = os2_execname(aTHX);
3606 perl = PL_origargv[0];
3610 /* This strips off Perl comments which might interfere with
3611 the C pre-processor, including #!. #line directives are
3612 deliberately stripped to avoid confusion with Perl's version
3613 of #line. FWP played some golf with it so it will fit
3614 into VMS's 255 character buffer.
3617 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3619 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3621 Perl_sv_setpvf(aTHX_ cmd, "\
3622 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3623 perl, quote, code, quote, scriptname, SVfARG(cpp),
3624 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3626 PL_doextract = FALSE;
3628 DEBUG_P(PerlIO_printf(Perl_debug_log,
3629 "PL_preprocess: cmd=\"%s\"\n",
3632 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3636 else if (!*scriptname) {
3637 forbid_setid(0, *suidscript);
3638 *rsfpp = PerlIO_stdin();
3641 #ifdef FAKE_BIT_BUCKET
3642 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3643 * is called) and still have the "-e" work. (Believe it or not,
3644 * a /dev/null is required for the "-e" to work because source
3645 * filter magic is used to implement it. ) This is *not* a general
3646 * replacement for a /dev/null. What we do here is create a temp
3647 * file (an empty file), open up that as the script, and then
3648 * immediately close and unlink it. Close enough for jazz. */
3649 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3650 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3651 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3652 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3653 FAKE_BIT_BUCKET_TEMPLATE
3655 const char * const err = "Failed to create a fake bit bucket";
3656 if (strEQ(scriptname, BIT_BUCKET)) {
3657 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3658 int tmpfd = mkstemp(tmpname);
3660 scriptname = tmpname;
3663 Perl_croak(aTHX_ err);
3666 scriptname = mktemp(tmpname);
3668 Perl_croak(aTHX_ err);
3673 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3674 #ifdef FAKE_BIT_BUCKET
3675 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3676 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3677 && strlen(scriptname) == sizeof(tmpname) - 1) {
3680 scriptname = BIT_BUCKET;
3682 # if defined(HAS_FCNTL) && defined(F_SETFD)
3684 /* ensure close-on-exec */
3685 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3688 #endif /* IAMSUID */
3690 /* PSz 16 Sep 03 Keep neat error message */
3692 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3694 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3695 CopFILE(PL_curcop), Strerror(errno));
3701 * I_SYSSTATVFS HAS_FSTATVFS
3703 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3704 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3705 * here so that metaconfig picks them up. */
3709 S_fd_on_nosuid_fs(pTHX_ int fd)
3712 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3713 * but is needed also on machines without setreuid.
3714 * Seems safe enough to run as root.
3716 int check_okay = 0; /* able to do all the required sys/libcalls */
3717 int on_nosuid = 0; /* the fd is on a nosuid fs */
3719 * Need to check noexec also: nosuid might not be set, the average
3720 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3722 int on_noexec = 0; /* the fd is on a noexec fs */
3725 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3726 * fstatvfs() is UNIX98.
3727 * fstatfs() is 4.3 BSD.
3728 * ustat()+getmnt() is pre-4.3 BSD.
3729 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3730 * an irrelevant filesystem while trying to reach the right one.
3733 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3735 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3736 defined(HAS_FSTATVFS)
3737 # define FD_ON_NOSUID_CHECK_OKAY
3738 struct statvfs stfs;
3740 check_okay = fstatvfs(fd, &stfs) == 0;
3741 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3743 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3744 on platforms where it is present. */
3745 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3747 # endif /* fstatvfs */
3749 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3750 defined(PERL_MOUNT_NOSUID) && \
3751 defined(PERL_MOUNT_NOEXEC) && \
3752 defined(HAS_FSTATFS) && \
3753 defined(HAS_STRUCT_STATFS) && \
3754 defined(HAS_STRUCT_STATFS_F_FLAGS)
3755 # define FD_ON_NOSUID_CHECK_OKAY
3758 check_okay = fstatfs(fd, &stfs) == 0;
3759 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3760 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3761 # endif /* fstatfs */
3763 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3764 defined(PERL_MOUNT_NOSUID) && \
3765 defined(PERL_MOUNT_NOEXEC) && \
3766 defined(HAS_FSTAT) && \
3767 defined(HAS_USTAT) && \
3768 defined(HAS_GETMNT) && \
3769 defined(HAS_STRUCT_FS_DATA) && \
3771 # define FD_ON_NOSUID_CHECK_OKAY
3774 if (fstat(fd, &fdst) == 0) {
3776 if (ustat(fdst.st_dev, &us) == 0) {
3778 /* NOSTAT_ONE here because we're not examining fields which
3779 * vary between that case and STAT_ONE. */
3780 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3781 size_t cmplen = sizeof(us.f_fname);
3782 if (sizeof(fsd.fd_req.path) < cmplen)
3783 cmplen = sizeof(fsd.fd_req.path);
3784 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3785 fdst.st_dev == fsd.fd_req.dev) {
3787 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3788 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3793 # endif /* fstat+ustat+getmnt */
3795 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3796 defined(HAS_GETMNTENT) && \
3797 defined(HAS_HASMNTOPT) && \
3798 defined(MNTOPT_NOSUID) && \
3799 defined(MNTOPT_NOEXEC)
3800 # define FD_ON_NOSUID_CHECK_OKAY
3801 FILE *mtab = fopen("/etc/mtab", "r");
3802 struct mntent *entry;
3805 if (mtab && (fstat(fd, &stb) == 0)) {
3806 while (entry = getmntent(mtab)) {
3807 if (stat(entry->mnt_dir, &fsb) == 0
3808 && fsb.st_dev == stb.st_dev)
3810 /* found the filesystem */
3812 if (hasmntopt(entry, MNTOPT_NOSUID))
3814 if (hasmntopt(entry, MNTOPT_NOEXEC))
3817 } /* A single fs may well fail its stat(). */
3822 # endif /* getmntent+hasmntopt */
3825 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3827 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3829 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3830 return ((!check_okay) || on_nosuid || on_noexec);
3832 #endif /* IAMSUID */
3835 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3836 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3841 #endif /* IAMSUID */
3843 /* do we need to emulate setuid on scripts? */
3845 /* This code is for those BSD systems that have setuid #! scripts disabled
3846 * in the kernel because of a security problem. Merely defining DOSUID
3847 * in perl will not fix that problem, but if you have disabled setuid
3848 * scripts in the kernel, this will attempt to emulate setuid and setgid
3849 * on scripts that have those now-otherwise-useless bits set. The setuid
3850 * root version must be called suidperl or sperlN.NNN. If regular perl
3851 * discovers that it has opened a setuid script, it calls suidperl with
3852 * the same argv that it had. If suidperl finds that the script it has
3853 * just opened is NOT setuid root, it sets the effective uid back to the
3854 * uid. We don't just make perl setuid root because that loses the
3855 * effective uid we had before invoking perl, if it was different from the
3858 * Description/comments above do not match current workings:
3859 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3860 * suidperl called with script open and name changed to /dev/fd/N/X;
3861 * suidperl croaks if script is not setuid;
3862 * making perl setuid would be a huge security risk (and yes, that
3863 * would lose any euid we might have had).
3865 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3866 * be defined in suidperl only. suidperl must be setuid root. The
3867 * Configure script will set this up for you if you want it.
3873 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3874 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3875 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3877 const char *linestr;
3881 if (fdscript < 0 || suidscript != 1)
3882 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3884 * Since the script is opened by perl, not suidperl, some of these
3885 * checks are superfluous. Leaving them in probably does not lower
3889 * Do checks even for systems with no HAS_SETREUID.
3890 * We used to swap, then re-swap UIDs with
3891 # ifdef HAS_SETREUID
3892 if (setreuid(PL_euid,PL_uid) < 0
3893 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3894 Perl_croak(aTHX_ "Can't swap uid and euid");
3896 # ifdef HAS_SETREUID
3897 if (setreuid(PL_uid,PL_euid) < 0
3898 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3899 Perl_croak(aTHX_ "Can't reswap uid and euid");
3903 /* On this access check to make sure the directories are readable,
3904 * there is actually a small window that the user could use to make
3905 * filename point to an accessible directory. So there is a faint
3906 * chance that someone could execute a setuid script down in a
3907 * non-accessible directory. I don't know what to do about that.
3908 * But I don't think it's too important. The manual lies when
3909 * it says access() is useful in setuid programs.
3911 * So, access() is pretty useless... but not harmful... do anyway.
3913 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3914 Perl_croak(aTHX_ "Can't access() script\n");
3917 /* If we can swap euid and uid, then we can determine access rights
3918 * with a simple stat of the file, and then compare device and
3919 * inode to make sure we did stat() on the same file we opened.
3920 * Then we just have to make sure he or she can execute it.
3923 * As the script is opened by perl, not suidperl, we do not need to
3924 * care much about access rights.
3926 * The 'script changed' check is needed, or we can get lied to
3927 * about $0 with e.g.
3928 * suidperl /dev/fd/4//bin/x 4<setuidscript
3929 * Without HAS_SETREUID, is it safe to stat() as root?
3931 * Are there any operating systems that pass /dev/fd/xxx for setuid
3932 * scripts, as suggested/described in perlsec(1)? Surely they do not
3933 * pass the script name as we do, so the "script changed" test would
3934 * fail for them... but we never get here with
3935 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3937 * This is one place where we must "lie" about return status: not
3938 * say if the stat() failed. We are doing this as root, and could
3939 * be tricked into reporting existence or not of files that the
3940 * "plain" user cannot even see.
3944 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3945 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3946 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3947 Perl_croak(aTHX_ "Setuid script changed\n");
3951 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3952 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3955 * We used to do this check as the "plain" user (after swapping
3956 * UIDs). But the check for nosuid and noexec filesystem is needed,
3957 * and should be done even without HAS_SETREUID. (Maybe those
3958 * operating systems do not have such mount options anyway...)
3959 * Seems safe enough to do as root.
3961 # if !defined(NO_NOSUID_CHECK)
3962 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3963 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3966 # endif /* IAMSUID */
3968 if (!S_ISREG(PL_statbuf.st_mode)) {
3969 Perl_croak(aTHX_ "Setuid script not plain file\n");
3971 if (PL_statbuf.st_mode & S_IWOTH)
3972 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3973 PL_doswitches = FALSE; /* -s is insecure in suid */
3974 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3975 CopLINE_inc(PL_curcop);
3976 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3977 Perl_croak(aTHX_ "No #! line");
3978 linestr = SvPV_nolen_const(linestr_sv);
3979 /* required even on Sys V */
3980 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3981 Perl_croak(aTHX_ "No #! line");
3985 /* Sanity check on line length */
3986 s_end = s + strlen(s);
3987 if (s_end == s || (s_end - s) > 4000)
3988 Perl_croak(aTHX_ "Very long #! line");
3989 /* Allow more than a single space after #! */
3990 while (isSPACE(*s)) s++;
3991 /* Sanity check on buffer end */
3992 while ((*s) && !isSPACE(*s)) s++;
3993 for (s2 = s; (s2 > linestr &&
3994 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3995 || s2[-1] == '-')); s2--) ;
3996 /* Sanity check on buffer start */
3997 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3998 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3999 Perl_croak(aTHX_ "Not a perl script");
4000 while (*s == ' ' || *s == '\t') s++;
4002 * #! arg must be what we saw above. They can invoke it by
4003 * mentioning suidperl explicitly, but they may not add any strange
4004 * arguments beyond what #! says if they do invoke suidperl that way.
4007 * The way validarg was set up, we rely on the kernel to start
4008 * scripts with argv[1] set to contain all #! line switches (the
4012 * Check that we got all the arguments listed in the #! line (not
4013 * just that there are no extraneous arguments). Might not matter
4014 * much, as switches from #! line seem to be acted upon (also), and
4015 * so may be checked and trapped in perl. But, security checks must
4016 * be done in suidperl and not deferred to perl. Note that suidperl
4017 * does not get around to parsing (and checking) the switches on
4018 * the #! line (but execs perl sooner).
4019 * Allow (require) a trailing newline (which may be of two
4020 * characters on some architectures?) (but no other trailing
4023 len = strlen(validarg);
4024 if (strEQ(validarg," PHOOEY ") ||
4025 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4026 !((s_end - s) == len+1
4027 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4028 Perl_croak(aTHX_ "Args must match #! line");
4032 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4033 PL_euid == PL_statbuf.st_uid)
4035 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4036 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4037 # endif /* IAMSUID */
4040 PL_euid) { /* oops, we're not the setuid root perl */
4042 * When root runs a setuid script, we do not go through the same
4043 * steps of execing sperl and then perl with fd scripts, but
4044 * simply set up UIDs within the same perl invocation; so do
4045 * not have the same checks (on options, whatever) that we have
4046 * for plain users. No problem really: would have to be a script
4047 * that does not actually work for plain users; and if root is
4048 * foolish and can be persuaded to run such an unsafe script, he
4049 * might run also non-setuid ones, and deserves what he gets.
4051 * Or, we might drop the PL_euid check above (and rely just on
4052 * fdscript to avoid loops), and do the execs
4058 * Pass fd script to suidperl.
4059 * Exec suidperl, substituting fd script for scriptname.
4060 * Pass script name as "subdir" of fd, which perl will grok;
4061 * in fact will use that to distinguish this from "normal"
4062 * usage, see comments above.
4064 PerlIO_rewind(rsfp);
4065 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4066 /* PSz 27 Feb 04 Sanity checks on scriptname */
4067 if ((!scriptname) || (!*scriptname) ) {
4068 Perl_croak(aTHX_ "No setuid script name\n");
4070 if (*scriptname == '-') {
4071 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4072 /* Or we might confuse it with an option when replacing
4073 * name in argument list, below (though we do pointer, not
4074 * string, comparisons).
4077 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4078 if (!PL_origargv[which]) {
4079 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4081 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4082 PerlIO_fileno(rsfp), PL_origargv[which]));
4083 # if defined(HAS_FCNTL) && defined(F_SETFD)
4084 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4087 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4088 (int)PERL_REVISION, (int)PERL_VERSION,
4089 (int)PERL_SUBVERSION), PL_origargv);
4091 # endif /* IAMSUID */
4092 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4095 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4097 * This seems back to front: we try HAS_SETEGID first; if not available
4098 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4099 * in the sense that we only want to set EGID; but are there any machines
4100 * with either of the latter, but not the former? Same with UID, later.
4103 (void)setegid(PL_statbuf.st_gid);
4105 # ifdef HAS_SETREGID
4106 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4108 # ifdef HAS_SETRESGID
4109 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4111 PerlProc_setgid(PL_statbuf.st_gid);
4115 if (PerlProc_getegid() != PL_statbuf.st_gid)
4116 Perl_croak(aTHX_ "Can't do setegid!\n");
4118 if (PL_statbuf.st_mode & S_ISUID) {
4119 if (PL_statbuf.st_uid != PL_euid)
4121 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4123 # ifdef HAS_SETREUID
4124 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4126 # ifdef HAS_SETRESUID
4127 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4129 PerlProc_setuid(PL_statbuf.st_uid);
4133 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4134 Perl_croak(aTHX_ "Can't do seteuid!\n");
4136 else if (PL_uid) { /* oops, mustn't run as root */
4138 (void)seteuid((Uid_t)PL_uid);
4140 # ifdef HAS_SETREUID
4141 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4143 # ifdef HAS_SETRESUID
4144 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4146 PerlProc_setuid((Uid_t)PL_uid);
4150 if (PerlProc_geteuid() != PL_uid)
4151 Perl_croak(aTHX_ "Can't do seteuid!\n");
4154 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4155 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4158 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4159 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4160 else if (fdscript < 0 || suidscript != 1)
4161 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4162 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4164 /* PSz 16 Sep 03 Keep neat error message */
4165 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4168 /* We absolutely must clear out any saved ids here, so we */
4169 /* exec the real perl, substituting fd script for scriptname. */
4170 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4172 * It might be thought that using setresgid and/or setresuid (changed to
4173 * set the saved IDs) above might obviate the need to exec, and we could
4174 * go on to "do the perl thing".
4176 * Is there such a thing as "saved GID", and is that set for setuid (but
4177 * not setgid) execution like suidperl? Without exec, it would not be
4178 * cleared for setuid (but not setgid) scripts (or might need a dummy
4181 * We need suidperl to do the exact same argument checking that perl
4182 * does. Thus it cannot be very small; while it could be significantly
4183 * smaller, it is safer (simpler?) to make it essentially the same
4184 * binary as perl (but they are not identical). - Maybe could defer that
4185 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4186 * but prefer to do thorough checks in suidperl itself. Such deferral
4187 * would make suidperl security rely on perl, a design no-no.
4189 * Setuid things should be short and simple, thus easy to understand and
4190 * verify. They should do their "own thing", without influence by
4191 * attackers. It may help if their internal execution flow is fixed,
4192 * regardless of platform: it may be best to exec anyway.
4194 * Suidperl should at least be conceptually simple: a wrapper only,
4195 * never to do any real perl. Maybe we should put
4197 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4199 * into the perly bits.
4201 PerlIO_rewind(rsfp);
4202 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4204 * Keep original arguments: suidperl already has fd script.
4206 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4207 /* if (!PL_origargv[which]) { */
4208 /* errno = EPERM; */
4209 /* Perl_croak(aTHX_ "Permission denied\n"); */
4211 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4212 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4213 # if defined(HAS_FCNTL) && defined(F_SETFD)
4214 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4217 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4218 (int)PERL_REVISION, (int)PERL_VERSION,
4219 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4221 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4222 # endif /* IAMSUID */
4224 PERL_UNUSED_ARG(fdscript);
4225 PERL_UNUSED_ARG(suidscript);
4226 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4227 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4228 PERL_UNUSED_ARG(rsfp);
4230 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4231 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4233 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4236 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4237 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4238 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4239 /* not set-id, must be wrapped */
4242 PERL_UNUSED_ARG(validarg);
4243 PERL_UNUSED_ARG(scriptname);
4244 PERL_UNUSED_ARG(linestr_sv);
4248 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4252 register const char *s2;
4253 #ifdef MACOS_TRADITIONAL
4257 /* skip forward in input to the real script? */
4259 #ifdef MACOS_TRADITIONAL
4260 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4262 while (PL_doextract || gMacPerl_AlwaysExtract) {
4263 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4264 if (!gMacPerl_AlwaysExtract)
4265 Perl_croak(aTHX_ "No Perl script found in input\n");
4267 if (PL_doextract) /* require explicit override ? */
4268 if (!OverrideExtract(PL_origfilename))
4269 Perl_croak(aTHX_ "User aborted script\n");
4271 PL_doextract = FALSE;
4273 /* Pater peccavi, file does not have #! */
4274 PerlIO_rewind(rsfp);
4279 while (PL_doextract) {
4280 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4281 Perl_croak(aTHX_ "No Perl script found in input\n");
4284 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4285 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4286 PL_doextract = FALSE;
4287 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4289 while (*s == ' ' || *s == '\t') s++;
4291 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4292 || s2[-1] == '_') s2--;
4293 if (strnEQ(s2-4,"perl",4))
4294 while ((s = moreswitches(s)))
4297 #ifdef MACOS_TRADITIONAL
4298 /* We are always searching for the #!perl line in MacPerl,
4299 * so if we find it, still keep the line count correct
4300 * by counting lines we already skipped over
4302 for (; maclines > 0 ; maclines--)
4303 PerlIO_ungetc(rsfp, '\n');
4307 /* gMacPerl_AlwaysExtract is false in MPW tool */
4308 } else if (gMacPerl_AlwaysExtract) {
4320 PL_uid = PerlProc_getuid();
4321 PL_euid = PerlProc_geteuid();
4322 PL_gid = PerlProc_getgid();
4323 PL_egid = PerlProc_getegid();
4325 PL_uid |= PL_gid << 16;
4326 PL_euid |= PL_egid << 16;
4328 /* Should not happen: */
4329 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4330 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4333 * Should go by suidscript, not uid!=euid: why disallow
4334 * system("ls") in scripts run from setuid things?
4335 * Or, is this run before we check arguments and set suidscript?
4336 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4337 * (We never have suidscript, can we be sure to have fdscript?)
4338 * Or must then go by UID checks? See comments in forbid_setid also.
4342 /* This is used very early in the lifetime of the program,
4343 * before even the options are parsed, so PL_tainting has
4344 * not been initialized properly. */
4346 Perl_doing_taint(int argc, char *argv[], char *envp[])
4348 #ifndef PERL_IMPLICIT_SYS
4349 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4350 * before we have an interpreter-- and the whole point of this
4351 * function is to be called at such an early stage. If you are on
4352 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4353 * "tainted because running with altered effective ids', you'll
4354 * have to add your own checks somewhere in here. The two most
4355 * known samples of 'implicitness' are Win32 and NetWare, neither
4356 * of which has much of concept of 'uids'. */
4357 int uid = PerlProc_getuid();
4358 int euid = PerlProc_geteuid();
4359 int gid = PerlProc_getgid();
4360 int egid = PerlProc_getegid();
4367 if (uid && (euid != uid || egid != gid))
4369 #endif /* !PERL_IMPLICIT_SYS */
4370 /* This is a really primitive check; environment gets ignored only
4371 * if -T are the first chars together; otherwise one gets
4372 * "Too late" message. */
4373 if ( argc > 1 && argv[1][0] == '-'
4374 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4379 /* Passing the flag as a single char rather than a string is a slight space
4380 optimisation. The only message that isn't /^-.$/ is
4381 "program input from stdin", which is substituted in place of '\0', which
4382 could never be a command line flag. */
4384 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4387 char string[3] = "-x";
4388 const char *message = "program input from stdin";
4395 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4396 if (PL_euid != PL_uid)
4397 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4398 if (PL_egid != PL_gid)
4399 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4400 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4402 * Checks for UID/GID above "wrong": why disallow
4403 * perl -e 'print "Hello\n"'
4404 * from within setuid things?? Simply drop them: replaced by
4405 * fdscript/suidscript and #ifdef IAMSUID checks below.
4407 * This may be too late for command-line switches. Will catch those on
4408 * the #! line, after finding the script name and setting up
4409 * fdscript/suidscript. Note that suidperl does not get around to
4410 * parsing (and checking) the switches on the #! line, but checks that
4411 * the two sets are identical.
4413 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4414 * instead, or would that be "too late"? (We never have suidscript, can
4415 * we be sure to have fdscript?)
4417 * Catch things with suidscript (in descendant of suidperl), even with
4418 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4419 * below; but I am paranoid.
4421 * Also see comments about root running a setuid script, elsewhere.
4423 if (suidscript >= 0)
4424 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4426 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4427 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4428 #endif /* IAMSUID */
4432 Perl_init_debugger(pTHX)
4435 HV * const ostash = PL_curstash;
4437 PL_curstash = PL_debstash;
4438 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4440 AvREAL_off(PL_dbargs);
4441 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4442 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4443 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4444 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4445 sv_setiv(PL_DBsingle, 0);
4446 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4447 sv_setiv(PL_DBtrace, 0);
4448 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4449 sv_setiv(PL_DBsignal, 0);
4450 PL_curstash = ostash;
4453 #ifndef STRESS_REALLOC
4454 #define REASONABLE(size) (size)
4456 #define REASONABLE(size) (1) /* unreasonable */
4460 Perl_init_stacks(pTHX)
4463 /* start with 128-item stack and 8K cxstack */
4464 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4465 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4466 PL_curstackinfo->si_type = PERLSI_MAIN;
4467 PL_curstack = PL_curstackinfo->si_stack;
4468 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4470 PL_stack_base = AvARRAY(PL_curstack);
4471 PL_stack_sp = PL_stack_base;
4472 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4474 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4477 PL_tmps_max = REASONABLE(128);
4479 Newx(PL_markstack,REASONABLE(32),I32);
4480 PL_markstack_ptr = PL_markstack;
4481 PL_markstack_max = PL_markstack + REASONABLE(32);
4485 Newx(PL_scopestack,REASONABLE(32),I32);
4486 PL_scopestack_ix = 0;
4487 PL_scopestack_max = REASONABLE(32);
4489 Newx(PL_savestack,REASONABLE(128),ANY);
4490 PL_savestack_ix = 0;
4491 PL_savestack_max = REASONABLE(128);
4500 while (PL_curstackinfo->si_next)
4501 PL_curstackinfo = PL_curstackinfo->si_next;
4502 while (PL_curstackinfo) {
4503 PERL_SI *p = PL_curstackinfo->si_prev;
4504 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4505 Safefree(PL_curstackinfo->si_cxstack);
4506 Safefree(PL_curstackinfo);
4507 PL_curstackinfo = p;
4509 Safefree(PL_tmps_stack);
4510 Safefree(PL_markstack);
4511 Safefree(PL_scopestack);
4512 Safefree(PL_savestack);
4517 S_init_predump_symbols(pTHX)
4523 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4524 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4525 GvMULTI_on(PL_stdingv);
4526 io = GvIOp(PL_stdingv);
4527 IoTYPE(io) = IoTYPE_RDONLY;
4528 IoIFP(io) = PerlIO_stdin();
4529 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4531 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4533 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4536 IoTYPE(io) = IoTYPE_WRONLY;
4537 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4539 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4541 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4543 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4544 GvMULTI_on(PL_stderrgv);
4545 io = GvIOp(PL_stderrgv);
4546 IoTYPE(io) = IoTYPE_WRONLY;
4547 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4548 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4550 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4552 PL_statname = newSV(0); /* last filename we did stat on */
4554 Safefree(PL_osname);
4555 PL_osname = savepv(OSNAME);
4559 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4562 argc--,argv++; /* skip name of script */
4563 if (PL_doswitches) {
4564 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4568 if (argv[0][1] == '-' && !argv[0][2]) {
4572 if ((s = strchr(argv[0], '='))) {
4573 const char *const start_name = argv[0] + 1;
4574 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4575 TRUE, SVt_PV)), s + 1);
4578 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4581 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4582 GvMULTI_on(PL_argvgv);
4583 (void)gv_AVadd(PL_argvgv);
4584 av_clear(GvAVn(PL_argvgv));
4585 for (; argc > 0; argc--,argv++) {
4586 SV * const sv = newSVpv(argv[0],0);
4587 av_push(GvAVn(PL_argvgv),sv);
4588 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4589 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4592 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4593 (void)sv_utf8_decode(sv);
4599 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4604 PL_toptarget = newSV_type(SVt_PVFM);
4605 sv_setpvn(PL_toptarget, "", 0);
4606 PL_bodytarget = newSV_type(SVt_PVFM);
4607 sv_setpvn(PL_bodytarget, "", 0);
4608 PL_formtarget = PL_bodytarget;
4612 init_argv_symbols(argc,argv);
4614 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4615 #ifdef MACOS_TRADITIONAL
4616 /* $0 is not majick on a Mac */
4617 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4619 sv_setpv(GvSV(tmpgv),PL_origfilename);
4620 magicname("0", "0", 1);
4623 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4625 bool env_is_not_environ;
4626 GvMULTI_on(PL_envgv);
4627 hv = GvHVn(PL_envgv);
4628 hv_magic(hv, NULL, PERL_MAGIC_env);
4630 #ifdef USE_ENVIRON_ARRAY
4631 /* Note that if the supplied env parameter is actually a copy
4632 of the global environ then it may now point to free'd memory
4633 if the environment has been modified since. To avoid this
4634 problem we treat env==NULL as meaning 'use the default'
4638 env_is_not_environ = env != environ;
4639 if (env_is_not_environ
4640 # ifdef USE_ITHREADS
4641 && PL_curinterp == aTHX
4650 for (; *env; env++) {
4651 if (!(s = strchr(*env,'=')) || s == *env)
4653 #if defined(MSDOS) && !defined(DJGPP)
4658 sv = newSVpv(s+1, 0);
4659 (void)hv_store(hv, *env, s - *env, sv, 0);
4660 if (env_is_not_environ)
4664 #endif /* USE_ENVIRON_ARRAY */
4665 #endif /* !PERL_MICRO */
4668 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4669 SvREADONLY_off(GvSV(tmpgv));
4670 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4671 SvREADONLY_on(GvSV(tmpgv));
4673 #ifdef THREADS_HAVE_PIDS
4674 PL_ppid = (IV)getppid();
4677 /* touch @F array to prevent spurious warnings 20020415 MJD */
4679 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4684 S_init_perllib(pTHX)
4690 s = PerlEnv_getenv("PERL5LIB");
4692 * It isn't possible to delete an environment variable with
4693 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4694 * case we treat PERL5LIB as undefined if it has a zero-length value.
4696 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4697 if (s && *s != '\0')
4701 incpush(s, TRUE, TRUE, TRUE, FALSE);
4703 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4705 /* Treat PERL5?LIB as a possible search list logical name -- the
4706 * "natural" VMS idiom for a Unix path string. We allow each
4707 * element to be a set of |-separated directories for compatibility.
4711 if (my_trnlnm("PERL5LIB",buf,0))
4712 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4714 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4718 /* Use the ~-expanded versions of APPLLIB (undocumented),
4719 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4722 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4726 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4728 #ifdef MACOS_TRADITIONAL
4731 SV * privdir = newSV(0);
4732 char * macperl = PerlEnv_getenv("MACPERL");
4737 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4738 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4739 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4740 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4741 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4742 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4744 SvREFCNT_dec(privdir);
4747 incpush(":", FALSE, FALSE, TRUE, FALSE);
4750 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4753 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4755 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4759 /* sitearch is always relative to sitelib on Windows for
4760 * DLL-based path intuition to work correctly */
4761 # if !defined(WIN32)
4762 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4768 /* this picks up sitearch as well */
4769 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4771 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4775 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4776 /* Search for version-specific dirs below here */
4777 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4780 #ifdef PERL_VENDORARCH_EXP
4781 /* vendorarch is always relative to vendorlib on Windows for
4782 * DLL-based path intuition to work correctly */
4783 # if !defined(WIN32)
4784 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4788 #ifdef PERL_VENDORLIB_EXP
4790 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4792 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4796 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4797 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4800 #ifdef PERL_OTHERLIBDIRS
4801 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4805 incpush(".", FALSE, FALSE, TRUE, FALSE);
4806 #endif /* MACOS_TRADITIONAL */
4809 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4810 # define PERLLIB_SEP ';'
4813 # define PERLLIB_SEP '|'
4815 # if defined(MACOS_TRADITIONAL)
4816 # define PERLLIB_SEP ','
4818 # define PERLLIB_SEP ':'
4822 #ifndef PERLLIB_MANGLE
4823 # define PERLLIB_MANGLE(s,n) (s)
4826 /* Push a directory onto @INC if it exists.
4827 Generate a new SV if we do this, to save needing to copy the SV we push
4830 S_incpush_if_exists(pTHX_ SV *dir)
4834 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4835 S_ISDIR(tmpstatbuf.st_mode)) {
4836 av_push(GvAVn(PL_incgv), dir);
4843 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4848 const char *p = dir;
4853 if (addsubdirs || addoldvers) {
4857 /* Break at all separators */
4859 SV *libdir = newSV(0);
4862 /* skip any consecutive separators */
4864 while ( *p == PERLLIB_SEP ) {
4865 /* Uncomment the next line for PATH semantics */
4866 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4871 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4872 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4877 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4878 p = NULL; /* break out */
4880 #ifdef MACOS_TRADITIONAL
4881 if (!strchr(SvPVX(libdir), ':')) {
4884 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4886 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4887 sv_catpvs(libdir, ":");
4890 /* Do the if() outside the #ifdef to avoid warnings about an unused
4893 #ifdef PERL_RELOCATABLE_INC
4895 * Relocatable include entries are marked with a leading .../
4898 * 0: Remove that leading ".../"
4899 * 1: Remove trailing executable name (anything after the last '/')
4900 * from the perl path to give a perl prefix
4902 * While the @INC element starts "../" and the prefix ends with a real
4903 * directory (ie not . or ..) chop that real directory off the prefix
4904 * and the leading "../" from the @INC element. ie a logical "../"
4906 * Finally concatenate the prefix and the remainder of the @INC element
4907 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4908 * generates /usr/local/lib/perl5
4910 const char *libpath = SvPVX(libdir);
4911 STRLEN libpath_len = SvCUR(libdir);
4912 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4914 SV * const caret_X = get_sv("\030", 0);
4915 /* Going to use the SV just as a scratch buffer holding a C
4921 /* $^X is *the* source of taint if tainting is on, hence
4922 SvPOK() won't be true. */
4924 assert(SvPOKp(caret_X));
4925 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4926 /* Firstly take off the leading .../
4927 If all else fail we'll do the paths relative to the current
4929 sv_chop(libdir, libpath + 4);
4930 /* Don't use SvPV as we're intentionally bypassing taining,
4931 mortal copies that the mg_get of tainting creates, and
4932 corruption that seems to come via the save stack.
4933 I guess that the save stack isn't correctly set up yet. */
4934 libpath = SvPVX(libdir);
4935 libpath_len = SvCUR(libdir);
4937 /* This would work more efficiently with memrchr, but as it's
4938 only a GNU extension we'd need to probe for it and
4939 implement our own. Not hard, but maybe not worth it? */
4941 prefix = SvPVX(prefix_sv);
4942 lastslash = strrchr(prefix, '/');
4944 /* First time in with the *lastslash = '\0' we just wipe off
4945 the trailing /perl from (say) /usr/foo/bin/perl
4949 while ((*lastslash = '\0'), /* Do that, come what may. */
4950 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4951 && (lastslash = strrchr(prefix, '/')))) {
4952 if (lastslash[1] == '\0'
4953 || (lastslash[1] == '.'
4954 && (lastslash[2] == '/' /* ends "/." */
4955 || (lastslash[2] == '/'
4956 && lastslash[3] == '/' /* or "/.." */
4958 /* Prefix ends "/" or "/." or "/..", any of which
4959 are fishy, so don't do any more logical cleanup.
4963 /* Remove leading "../" from path */
4966 /* Next iteration round the loop removes the last
4967 directory name from prefix by writing a '\0' in
4968 the while clause. */
4970 /* prefix has been terminated with a '\0' to the correct
4971 length. libpath points somewhere into the libdir SV.
4972 We need to join the 2 with '/' and drop the result into
4974 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4975 SvREFCNT_dec(libdir);
4976 /* And this is the new libdir. */
4979 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4980 /* Need to taint reloccated paths if running set ID */
4981 SvTAINTED_on(libdir);
4984 SvREFCNT_dec(prefix_sv);
4989 * BEFORE pushing libdir onto @INC we may first push version- and
4990 * archname-specific sub-directories.
4992 if (addsubdirs || addoldvers) {
4993 #ifdef PERL_INC_VERSION_LIST
4994 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4995 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4996 const char * const *incver;
5002 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5004 while (unix[len-1] == '/') len--; /* Cosmetic */
5005 sv_usepvn(libdir,unix,len);
5008 PerlIO_printf(Perl_error_log,
5009 "Failed to unixify @INC element \"%s\"\n",
5013 #ifdef MACOS_TRADITIONAL
5014 #define PERL_AV_SUFFIX_FMT ""
5015 #define PERL_ARCH_FMT "%s:"
5016 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5018 #define PERL_AV_SUFFIX_FMT "/"
5019 #define PERL_ARCH_FMT "/%s"
5020 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5022 /* .../version/archname if -d .../version/archname */
5023 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5025 (int)PERL_REVISION, (int)PERL_VERSION,
5026 (int)PERL_SUBVERSION, ARCHNAME);
5027 subdir = S_incpush_if_exists(aTHX_ subdir);
5029 /* .../version if -d .../version */
5030 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5032 (int)PERL_REVISION, (int)PERL_VERSION,
5033 (int)PERL_SUBVERSION);
5034 subdir = S_incpush_if_exists(aTHX_ subdir);
5036 /* .../archname if -d .../archname */
5037 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5038 SVfARG(libdir), ARCHNAME);
5039 subdir = S_incpush_if_exists(aTHX_ subdir);
5043 #ifdef PERL_INC_VERSION_LIST
5045 for (incver = incverlist; *incver; incver++) {
5046 /* .../xxx if -d .../xxx */
5047 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5048 SVfARG(libdir), *incver);
5049 subdir = S_incpush_if_exists(aTHX_ subdir);
5055 /* finally push this lib directory on the end of @INC */
5056 av_push(GvAVn(PL_incgv), libdir);
5059 assert (SvREFCNT(subdir) == 1);
5060 SvREFCNT_dec(subdir);
5066 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5070 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5076 while (av_len(paramList) >= 0) {
5077 cv = (CV*)av_shift(paramList);
5079 if (paramList == PL_beginav) {
5080 /* save PL_beginav for compiler */
5081 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5083 else if (paramList == PL_checkav) {
5084 /* save PL_checkav for compiler */
5085 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5087 else if (paramList == PL_unitcheckav) {
5088 /* save PL_unitcheckav for compiler */
5089 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5100 PL_madskills |= 16384;
5105 PL_madskills &= ~16384;
5108 (void)SvPV_const(atsv, len);
5110 PL_curcop = &PL_compiling;
5111 CopLINE_set(PL_curcop, oldline);
5112 if (paramList == PL_beginav)
5113 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5115 Perl_sv_catpvf(aTHX_ atsv,
5116 "%s failed--call queue aborted",
5117 paramList == PL_checkav ? "CHECK"
5118 : paramList == PL_initav ? "INIT"
5119 : paramList == PL_unitcheckav ? "UNITCHECK"
5121 while (PL_scopestack_ix > oldscope)
5124 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5131 /* my_exit() was called */
5132 while (PL_scopestack_ix > oldscope)
5135 PL_curstash = PL_defstash;
5136 PL_curcop = &PL_compiling;
5137 CopLINE_set(PL_curcop, oldline);
5139 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5140 if (paramList == PL_beginav)
5141 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5143 Perl_croak(aTHX_ "%s failed--call queue aborted",
5144 paramList == PL_checkav ? "CHECK"
5145 : paramList == PL_initav ? "INIT"
5146 : paramList == PL_unitcheckav ? "UNITCHECK"
5153 PL_curcop = &PL_compiling;
5154 CopLINE_set(PL_curcop, oldline);
5157 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5166 Perl_my_exit(pTHX_ U32 status)
5169 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5170 (void*)thr, (unsigned long) status));
5179 STATUS_EXIT_SET(status);
5186 Perl_my_failure_exit(pTHX)
5190 /* We have been called to fall on our sword. The desired exit code
5191 * should be already set in STATUS_UNIX, but could be shifted over
5192 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5195 * If an error code has not been set, then force the issue.
5197 if (MY_POSIX_EXIT) {
5199 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5200 * the exit code when there isn't an error.
5203 if (STATUS_UNIX == 0)
5204 STATUS_UNIX_EXIT_SET(255);
5206 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5208 /* The exit code could have been set by $? or vmsish which
5209 * means that it may not be fatal. So convert
5210 * success/warning codes to fatal.
5212 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5213 STATUS_UNIX_EXIT_SET(255);
5217 /* Traditionally Perl on VMS always expects a Fatal Error. */
5218 if (vaxc$errno & 1) {
5220 /* So force success status to failure */
5221 if (STATUS_NATIVE & 1)
5226 STATUS_UNIX = EINTR; /* In case something cares */
5231 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5233 /* Encode the severity code */
5234 severity = STATUS_NATIVE & STS$M_SEVERITY;
5235 STATUS_UNIX = (severity ? severity : 1) << 8;
5237 /* Perl expects this to be a fatal error */
5238 if (severity != STS$K_SEVERE)
5247 STATUS_UNIX_SET(errno);
5249 exitstatus = STATUS_UNIX >> 8;
5250 if (exitstatus & 255)
5251 STATUS_UNIX_SET(exitstatus);
5253 STATUS_UNIX_SET(255);
5260 S_my_exit_jump(pTHX)
5265 SvREFCNT_dec(PL_e_script);
5269 POPSTACK_TO(PL_mainstack);
5277 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5280 const char * const p = SvPVX_const(PL_e_script);
5281 const char *nl = strchr(p, '\n');
5283 PERL_UNUSED_ARG(idx);
5284 PERL_UNUSED_ARG(maxlen);
5286 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5288 filter_del(read_e_script);
5291 sv_catpvn(buf_sv, p, nl-p);
5292 sv_chop(PL_e_script, nl);
5298 * c-indentation-style: bsd
5300 * indent-tabs-mode: t
5303 * ex: set ts=8 sts=4 sw=4 noet: