3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
185 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
188 Perl_sys_init(int* argc, char*** argv)
191 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
192 PERL_UNUSED_ARG(argv);
193 PERL_SYS_INIT_BODY(argc, argv);
197 Perl_sys_init3(int* argc, char*** argv, char*** env)
200 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
201 PERL_UNUSED_ARG(argv);
202 PERL_UNUSED_ARG(env);
203 PERL_SYS_INIT3_BODY(argc, argv, env);
210 if (!PL_veto_cleanup) {
211 PERL_SYS_TERM_BODY();
216 #ifdef PERL_IMPLICIT_SYS
218 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
219 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
220 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
221 struct IPerlDir* ipD, struct IPerlSock* ipS,
222 struct IPerlProc* ipP)
224 PerlInterpreter *my_perl;
225 /* Newx() needs interpreter, so call malloc() instead */
226 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
227 S_init_tls_and_interp(my_perl);
228 Zero(my_perl, 1, PerlInterpreter);
238 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
245 =head1 Embedding Functions
247 =for apidoc perl_alloc
249 Allocates a new Perl interpreter. See L<perlembed>.
257 PerlInterpreter *my_perl;
259 /* Newx() needs interpreter, so call malloc() instead */
260 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
262 S_init_tls_and_interp(my_perl);
263 #ifndef PERL_TRACK_MEMPOOL
264 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
266 Zero(my_perl, 1, PerlInterpreter);
267 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
271 #endif /* PERL_IMPLICIT_SYS */
274 =for apidoc perl_construct
276 Initializes a new Perl interpreter. See L<perlembed>.
282 perl_construct(pTHXx)
285 PERL_UNUSED_ARG(my_perl);
288 PL_perl_destruct_level = 1;
290 if (PL_perl_destruct_level > 0)
293 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
295 /* set read-only and try to insure than we wont see REFCNT==0
298 SvREADONLY_on(&PL_sv_undef);
299 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
301 sv_setpv(&PL_sv_no,PL_No);
302 /* value lookup in void context - happens to have the side effect
303 of caching the numeric forms. However, as &PL_sv_no doesn't contain
304 a string that is a valid numer, we have to turn the public flags by
310 SvREADONLY_on(&PL_sv_no);
311 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
313 sv_setpv(&PL_sv_yes,PL_Yes);
316 SvREADONLY_on(&PL_sv_yes);
317 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
319 SvREADONLY_on(&PL_sv_placeholder);
320 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
322 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
323 #ifdef PERL_USES_PL_PIDSTATUS
324 PL_pidstatus = newHV();
327 PL_rs = newSVpvs("\n");
337 SET_NUMERIC_STANDARD();
339 #if defined(LOCAL_PATCH_COUNT)
340 PL_localpatches = local_patches; /* For possible -v */
343 #ifdef HAVE_INTERP_INTERN
347 PerlIO_init(aTHX); /* Hook to IO system */
349 PL_fdpid = newAV(); /* for remembering popen pids by fd */
350 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
351 PL_errors = newSVpvs("");
352 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
353 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
354 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
356 /* First entry is an array of empty elements */
357 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
358 PL_regex_pad = AvARRAY(PL_regex_padav);
360 #ifdef USE_REENTRANT_API
361 Perl_reentrant_init(aTHX);
364 /* Note that strtab is a rather special HV. Assumptions are made
365 about not iterating on it, and not adding tie magic to it.
366 It is properly deallocated in perl_destruct() */
369 HvSHAREKEYS_off(PL_strtab); /* mandatory */
370 hv_ksplit(PL_strtab, 512);
372 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
373 _dyld_lookup_and_bind
374 ("__environ", (unsigned long *) &environ_pointer, NULL);
378 # ifdef USE_ENVIRON_ARRAY
379 PL_origenviron = environ;
383 /* Use sysconf(_SC_CLK_TCK) if available, if not
384 * available or if the sysconf() fails, use the HZ.
385 * BeOS has those, but returns the wrong value.
386 * The HZ if not originally defined has been by now
387 * been defined as CLK_TCK, if available. */
388 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
389 PL_clocktick = sysconf(_SC_CLK_TCK);
390 if (PL_clocktick <= 0)
394 PL_stashcache = newHV();
396 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
397 (int)PERL_VERSION, (int)PERL_SUBVERSION);
400 if (!PL_mmap_page_size) {
401 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
403 SETERRNO(0, SS_NORMAL);
405 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
407 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
409 if ((long) PL_mmap_page_size < 0) {
411 SV * const error = ERRSV;
412 SvUPGRADE(error, SVt_PV);
413 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
416 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
420 # ifdef HAS_GETPAGESIZE
421 PL_mmap_page_size = getpagesize();
423 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
424 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
428 if (PL_mmap_page_size <= 0)
429 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
430 (IV) PL_mmap_page_size);
432 #endif /* HAS_MMAP */
434 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
435 PL_timesbase.tms_utime = 0;
436 PL_timesbase.tms_stime = 0;
437 PL_timesbase.tms_cutime = 0;
438 PL_timesbase.tms_cstime = 0;
445 =for apidoc nothreadhook
447 Stub that provides thread hook for perl_destruct when there are
454 Perl_nothreadhook(pTHX)
460 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
462 Perl_dump_sv_child(pTHX_ SV *sv)
465 const int sock = PL_dumper_fd;
466 const int debug_fd = PerlIO_fileno(Perl_debug_log);
467 union control_un control;
470 struct cmsghdr *cmptr;
472 unsigned char buffer[256];
474 if(sock == -1 || debug_fd == -1)
477 PerlIO_flush(Perl_debug_log);
479 /* All these shenanigans are to pass a file descriptor over to our child for
480 it to dump out to. We can't let it hold open the file descriptor when it
481 forks, as the file descriptor it will dump to can turn out to be one end
482 of pipe that some other process will wait on for EOF. (So as it would
483 be open, the wait would be forever.) */
485 msg.msg_control = control.control;
486 msg.msg_controllen = sizeof(control.control);
487 /* We're a connected socket so we don't need a destination */
493 cmptr = CMSG_FIRSTHDR(&msg);
494 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
495 cmptr->cmsg_level = SOL_SOCKET;
496 cmptr->cmsg_type = SCM_RIGHTS;
497 *((int *)CMSG_DATA(cmptr)) = 1;
499 vec[0].iov_base = (void*)&sv;
500 vec[0].iov_len = sizeof(sv);
501 got = sendmsg(sock, &msg, 0);
504 perror("Debug leaking scalars parent sendmsg failed");
507 if(got < sizeof(sv)) {
508 perror("Debug leaking scalars parent short sendmsg");
512 /* Return protocol is
514 unsigned char: length of location string (0 for empty)
515 unsigned char*: string (not terminated)
517 vec[0].iov_base = (void*)&returned_errno;
518 vec[0].iov_len = sizeof(returned_errno);
519 vec[1].iov_base = buffer;
522 got = readv(sock, vec, 2);
525 perror("Debug leaking scalars parent read failed");
526 PerlIO_flush(PerlIO_stderr());
529 if(got < sizeof(returned_errno) + 1) {
530 perror("Debug leaking scalars parent short read");
531 PerlIO_flush(PerlIO_stderr());
536 got = read(sock, buffer + 1, *buffer);
538 perror("Debug leaking scalars parent read 2 failed");
539 PerlIO_flush(PerlIO_stderr());
544 perror("Debug leaking scalars parent short read 2");
545 PerlIO_flush(PerlIO_stderr());
550 if (returned_errno || *buffer) {
551 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
552 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
553 returned_errno, strerror(returned_errno));
559 =for apidoc perl_destruct
561 Shuts down a Perl interpreter. See L<perlembed>.
570 VOL signed char destruct_level; /* see possible values in intrpvar.h */
572 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
576 PERL_UNUSED_ARG(my_perl);
578 /* wait for all pseudo-forked children to finish */
579 PERL_WAIT_FOR_CHILDREN;
581 destruct_level = PL_perl_destruct_level;
584 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
586 const int i = atoi(s);
587 if (destruct_level < i)
593 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
599 if (PL_endav && !PL_minus_c)
600 call_list(PL_scopestack_ix, PL_endav);
606 /* Need to flush since END blocks can produce output */
609 if (CALL_FPTR(PL_threadhook)(aTHX)) {
610 /* Threads hook has vetoed further cleanup */
611 PL_veto_cleanup = TRUE;
615 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
616 if (destruct_level != 0) {
617 /* Fork here to create a child. Our child's job is to preserve the
618 state of scalars prior to destruction, so that we can instruct it
619 to dump any scalars that we later find have leaked.
620 There's no subtlety in this code - it assumes POSIX, and it doesn't
624 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
625 perror("Debug leaking scalars socketpair failed");
631 perror("Debug leaking scalars fork failed");
635 /* We are the child */
636 const int sock = fd[1];
637 const int debug_fd = PerlIO_fileno(Perl_debug_log);
640 /* Our success message is an integer 0, and a char 0 */
641 static const char success[sizeof(int) + 1];
645 /* We need to close all other file descriptors otherwise we end up
646 with interesting hangs, where the parent closes its end of a
647 pipe, and sits waiting for (another) child to terminate. Only
648 that child never terminates, because it never gets EOF, because
649 we also have the far end of the pipe open. We even need to
650 close the debugging fd, because sometimes it happens to be one
651 end of a pipe, and a process is waiting on the other end for
652 EOF. Normally it would be closed at some point earlier in
653 destruction, but if we happen to cause the pipe to remain open,
654 EOF never occurs, and we get an infinite hang. Hence all the
655 games to pass in a file descriptor if it's actually needed. */
657 f = sysconf(_SC_OPEN_MAX);
659 where = "sysconf failed";
670 union control_un control;
673 struct cmsghdr *cmptr;
677 msg.msg_control = control.control;
678 msg.msg_controllen = sizeof(control.control);
679 /* We're a connected socket so we don't need a source */
683 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
685 vec[0].iov_base = (void*)⌖
686 vec[0].iov_len = sizeof(target);
688 got = recvmsg(sock, &msg, 0);
693 where = "recv failed";
696 if(got < sizeof(target)) {
697 where = "short recv";
701 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
705 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
706 where = "wrong cmsg_len";
709 if(cmptr->cmsg_level != SOL_SOCKET) {
710 where = "wrong cmsg_level";
713 if(cmptr->cmsg_type != SCM_RIGHTS) {
714 where = "wrong cmsg_type";
718 got_fd = *(int*)CMSG_DATA(cmptr);
719 /* For our last little bit of trickery, put the file descriptor
720 back into Perl_debug_log, as if we never actually closed it
722 if(got_fd != debug_fd) {
723 if (dup2(got_fd, debug_fd) == -1) {
730 PerlIO_flush(Perl_debug_log);
732 got = write(sock, &success, sizeof(success));
735 where = "write failed";
738 if(got < sizeof(success)) {
739 where = "short write";
746 int send_errno = errno;
747 unsigned char length = (unsigned char) strlen(where);
748 struct iovec failure[3] = {
749 {(void*)&send_errno, sizeof(send_errno)},
751 {(void*)where, length}
753 int got = writev(sock, failure, 3);
754 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
755 in the parent if we try to read from the socketpair after the
756 child has exited, even if there was data to read.
757 So sleep a bit to give the parent a fighting chance of
760 _exit((got == -1) ? errno : 0);
764 PL_dumper_fd = fd[0];
769 /* We must account for everything. */
771 /* Destroy the main CV and syntax tree */
772 /* Do this now, because destroying ops can cause new SVs to be generated
773 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
774 PL_curcop to point to a valid op from which the filename structure
776 PL_curcop = &PL_compiling;
778 /* ensure comppad/curpad to refer to main's pad */
779 if (CvPADLIST(PL_main_cv)) {
780 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
782 op_free(PL_main_root);
785 PL_main_start = NULL;
786 SvREFCNT_dec(PL_main_cv);
790 /* Tell PerlIO we are about to tear things apart in case
791 we have layers which are using resources that should
795 PerlIO_destruct(aTHX);
797 if (PL_sv_objcount) {
799 * Try to destruct global references. We do this first so that the
800 * destructors and destructees still exist. Some sv's might remain.
801 * Non-referenced objects are on their own.
805 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
806 PL_defoutgv = NULL; /* may have been freed */
809 /* unhook hooks which will soon be, or use, destroyed data */
810 SvREFCNT_dec(PL_warnhook);
812 SvREFCNT_dec(PL_diehook);
815 /* call exit list functions */
816 while (PL_exitlistlen-- > 0)
817 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
819 Safefree(PL_exitlist);
824 /* jettison our possibly duplicated environment */
825 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
826 * so we certainly shouldn't free it here
829 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
830 if (environ != PL_origenviron && !PL_use_safe_putenv
832 /* only main thread can free environ[0] contents */
833 && PL_curinterp == aTHX
839 for (i = 0; environ[i]; i++)
840 safesysfree(environ[i]);
842 /* Must use safesysfree() when working with environ. */
843 safesysfree(environ);
845 environ = PL_origenviron;
848 #endif /* !PERL_MICRO */
850 if (destruct_level == 0) {
852 DEBUG_P(debprofdump());
854 #if defined(PERLIO_LAYERS)
855 /* No more IO - including error messages ! */
856 PerlIO_cleanup(aTHX);
859 CopFILE_free(&PL_compiling);
860 CopSTASH_free(&PL_compiling);
862 /* The exit() function will do everything that needs doing. */
866 /* reset so print() ends up where we expect */
870 /* the syntax tree is shared between clones
871 * so op_free(PL_main_root) only ReREFCNT_dec's
872 * REGEXPs in the parent interpreter
873 * we need to manually ReREFCNT_dec for the clones
876 I32 i = AvFILLp(PL_regex_padav) + 1;
877 SV * const * const ary = AvARRAY(PL_regex_padav);
880 SV * const resv = ary[--i];
882 if (SvFLAGS(resv) & SVf_BREAK) {
883 /* this is PL_reg_curpm, already freed
884 * flag is set in regexec.c:S_regtry
886 SvFLAGS(resv) &= ~SVf_BREAK;
887 /* So stop it pointing to what is now a dead reference. */
890 else if(SvREPADTMP(resv)) {
891 SvREPADTMP_off(resv);
895 SvREFCNT_dec(PL_regex_padav);
896 PL_regex_padav = NULL;
900 SvREFCNT_dec((SV*) PL_stashcache);
901 PL_stashcache = NULL;
903 /* loosen bonds of global variables */
905 /* XXX can PL_parser still be non-null here? */
906 if(PL_parser && PL_parser->rsfp) {
907 (void)PerlIO_close(PL_parser->rsfp);
908 PL_parser->rsfp = NULL;
912 Safefree(PL_splitstr);
917 PL_preprocess = FALSE;
923 PL_doswitches = FALSE;
924 PL_dowarn = G_WARN_OFF;
925 PL_doextract = FALSE;
926 PL_sawampersand = FALSE; /* must save all match strings */
929 Safefree(PL_inplace);
931 SvREFCNT_dec(PL_patchlevel);
934 SvREFCNT_dec(PL_e_script);
940 /* magical thingies */
942 SvREFCNT_dec(PL_ofs_sv); /* $, */
945 SvREFCNT_dec(PL_ors_sv); /* $\ */
948 SvREFCNT_dec(PL_rs); /* $/ */
951 Safefree(PL_osname); /* $^O */
954 SvREFCNT_dec(PL_statname);
958 /* defgv, aka *_ should be taken care of elsewhere */
960 /* clean up after study() */
961 SvREFCNT_dec(PL_lastscream);
962 PL_lastscream = NULL;
963 Safefree(PL_screamfirst);
965 Safefree(PL_screamnext);
969 Safefree(PL_efloatbuf);
973 /* startup and shutdown function lists */
974 SvREFCNT_dec(PL_beginav);
975 SvREFCNT_dec(PL_beginav_save);
976 SvREFCNT_dec(PL_endav);
977 SvREFCNT_dec(PL_checkav);
978 SvREFCNT_dec(PL_checkav_save);
979 SvREFCNT_dec(PL_unitcheckav);
980 SvREFCNT_dec(PL_unitcheckav_save);
981 SvREFCNT_dec(PL_initav);
983 PL_beginav_save = NULL;
986 PL_checkav_save = NULL;
987 PL_unitcheckav = NULL;
988 PL_unitcheckav_save = NULL;
991 /* shortcuts just get cleared */
1000 PL_last_in_gv = NULL;
1012 SvREFCNT_dec(PL_argvout_stack);
1013 PL_argvout_stack = NULL;
1015 SvREFCNT_dec(PL_modglobal);
1016 PL_modglobal = NULL;
1017 SvREFCNT_dec(PL_preambleav);
1018 PL_preambleav = NULL;
1019 SvREFCNT_dec(PL_subname);
1021 #ifdef PERL_USES_PL_PIDSTATUS
1022 SvREFCNT_dec(PL_pidstatus);
1023 PL_pidstatus = NULL;
1025 SvREFCNT_dec(PL_toptarget);
1026 PL_toptarget = NULL;
1027 SvREFCNT_dec(PL_bodytarget);
1028 PL_bodytarget = NULL;
1029 PL_formtarget = NULL;
1031 /* free locale stuff */
1032 #ifdef USE_LOCALE_COLLATE
1033 Safefree(PL_collation_name);
1034 PL_collation_name = NULL;
1037 #ifdef USE_LOCALE_NUMERIC
1038 Safefree(PL_numeric_name);
1039 PL_numeric_name = NULL;
1040 SvREFCNT_dec(PL_numeric_radix_sv);
1041 PL_numeric_radix_sv = NULL;
1044 /* clear utf8 character classes */
1045 SvREFCNT_dec(PL_utf8_alnum);
1046 SvREFCNT_dec(PL_utf8_alnumc);
1047 SvREFCNT_dec(PL_utf8_ascii);
1048 SvREFCNT_dec(PL_utf8_alpha);
1049 SvREFCNT_dec(PL_utf8_space);
1050 SvREFCNT_dec(PL_utf8_cntrl);
1051 SvREFCNT_dec(PL_utf8_graph);
1052 SvREFCNT_dec(PL_utf8_digit);
1053 SvREFCNT_dec(PL_utf8_upper);
1054 SvREFCNT_dec(PL_utf8_lower);
1055 SvREFCNT_dec(PL_utf8_print);
1056 SvREFCNT_dec(PL_utf8_punct);
1057 SvREFCNT_dec(PL_utf8_xdigit);
1058 SvREFCNT_dec(PL_utf8_mark);
1059 SvREFCNT_dec(PL_utf8_toupper);
1060 SvREFCNT_dec(PL_utf8_totitle);
1061 SvREFCNT_dec(PL_utf8_tolower);
1062 SvREFCNT_dec(PL_utf8_tofold);
1063 SvREFCNT_dec(PL_utf8_idstart);
1064 SvREFCNT_dec(PL_utf8_idcont);
1065 PL_utf8_alnum = NULL;
1066 PL_utf8_alnumc = NULL;
1067 PL_utf8_ascii = NULL;
1068 PL_utf8_alpha = NULL;
1069 PL_utf8_space = NULL;
1070 PL_utf8_cntrl = NULL;
1071 PL_utf8_graph = NULL;
1072 PL_utf8_digit = NULL;
1073 PL_utf8_upper = NULL;
1074 PL_utf8_lower = NULL;
1075 PL_utf8_print = NULL;
1076 PL_utf8_punct = NULL;
1077 PL_utf8_xdigit = NULL;
1078 PL_utf8_mark = NULL;
1079 PL_utf8_toupper = NULL;
1080 PL_utf8_totitle = NULL;
1081 PL_utf8_tolower = NULL;
1082 PL_utf8_tofold = NULL;
1083 PL_utf8_idstart = NULL;
1084 PL_utf8_idcont = NULL;
1086 if (!specialWARN(PL_compiling.cop_warnings))
1087 PerlMemShared_free(PL_compiling.cop_warnings);
1088 PL_compiling.cop_warnings = NULL;
1089 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1090 PL_compiling.cop_hints_hash = NULL;
1091 CopFILE_free(&PL_compiling);
1092 CopSTASH_free(&PL_compiling);
1094 /* Prepare to destruct main symbol table. */
1099 SvREFCNT_dec(PL_curstname);
1100 PL_curstname = NULL;
1102 /* clear queued errors */
1103 SvREFCNT_dec(PL_errors);
1106 SvREFCNT_dec(PL_isarev);
1109 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1110 if (PL_scopestack_ix != 0)
1111 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1112 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1113 (long)PL_scopestack_ix);
1114 if (PL_savestack_ix != 0)
1115 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1116 "Unbalanced saves: %ld more saves than restores\n",
1117 (long)PL_savestack_ix);
1118 if (PL_tmps_floor != -1)
1119 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1120 (long)PL_tmps_floor + 1);
1121 if (cxstack_ix != -1)
1122 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1123 (long)cxstack_ix + 1);
1126 /* Now absolutely destruct everything, somehow or other, loops or no. */
1127 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1128 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1130 /* the 2 is for PL_fdpid and PL_strtab */
1131 while (PL_sv_count > 2 && sv_clean_all())
1134 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1135 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1136 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1137 SvFLAGS(PL_strtab) |= SVt_PVHV;
1139 AvREAL_off(PL_fdpid); /* no surviving entries */
1140 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1143 #ifdef HAVE_INTERP_INTERN
1147 /* Destruct the global string table. */
1149 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1150 * so that sv_free() won't fail on them.
1151 * Now that the global string table is using a single hunk of memory
1152 * for both HE and HEK, we either need to explicitly unshare it the
1153 * correct way, or actually free things here.
1156 const I32 max = HvMAX(PL_strtab);
1157 HE * const * const array = HvARRAY(PL_strtab);
1158 HE *hent = array[0];
1161 if (hent && ckWARN_d(WARN_INTERNAL)) {
1162 HE * const next = HeNEXT(hent);
1163 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1164 "Unbalanced string table refcount: (%ld) for \"%s\"",
1165 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1172 hent = array[riter];
1177 HvARRAY(PL_strtab) = 0;
1178 HvTOTALKEYS(PL_strtab) = 0;
1179 HvFILL(PL_strtab) = 0;
1181 SvREFCNT_dec(PL_strtab);
1184 /* free the pointer tables used for cloning */
1185 ptr_table_free(PL_ptr_table);
1186 PL_ptr_table = (PTR_TBL_t*)NULL;
1189 /* free special SVs */
1191 SvREFCNT(&PL_sv_yes) = 0;
1192 sv_clear(&PL_sv_yes);
1193 SvANY(&PL_sv_yes) = NULL;
1194 SvFLAGS(&PL_sv_yes) = 0;
1196 SvREFCNT(&PL_sv_no) = 0;
1197 sv_clear(&PL_sv_no);
1198 SvANY(&PL_sv_no) = NULL;
1199 SvFLAGS(&PL_sv_no) = 0;
1203 for (i=0; i<=2; i++) {
1204 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1205 sv_clear(PERL_DEBUG_PAD(i));
1206 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1207 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1211 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1212 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1214 #ifdef DEBUG_LEAKING_SCALARS
1215 if (PL_sv_count != 0) {
1220 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1221 svend = &sva[SvREFCNT(sva)];
1222 for (sv = sva + 1; sv < svend; ++sv) {
1223 if (SvTYPE(sv) != SVTYPEMASK) {
1224 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1226 " refcnt=%"UVuf pTHX__FORMAT "\n"
1227 "\tallocated at %s:%d %s %s%s\n",
1228 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1229 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1231 sv->sv_debug_inpad ? "for" : "by",
1232 sv->sv_debug_optype ?
1233 PL_op_name[sv->sv_debug_optype]: "(none)",
1234 sv->sv_debug_cloned ? " (cloned)" : ""
1236 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1237 Perl_dump_sv_child(aTHX_ sv);
1243 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1247 /* Wait for up to 4 seconds for child to terminate.
1248 This seems to be the least effort way of timing out on reaping
1250 struct timeval waitfor = {4, 0};
1251 int sock = PL_dumper_fd;
1255 FD_SET(sock, &rset);
1256 select(sock + 1, &rset, NULL, NULL, &waitfor);
1257 waitpid(child, &status, WNOHANG);
1264 #ifdef PERL_DEBUG_READONLY_OPS
1270 #if defined(PERLIO_LAYERS)
1271 /* No more IO - including error messages ! */
1272 PerlIO_cleanup(aTHX);
1275 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1276 as currently layers use it rather than NULL as a marker
1277 for no arg - and will try and SvREFCNT_dec it.
1279 SvREFCNT(&PL_sv_undef) = 0;
1280 SvREADONLY_off(&PL_sv_undef);
1282 Safefree(PL_origfilename);
1283 PL_origfilename = NULL;
1284 Safefree(PL_reg_start_tmp);
1285 PL_reg_start_tmp = (char**)NULL;
1286 PL_reg_start_tmpl = 0;
1287 Safefree(PL_reg_curpm);
1288 Safefree(PL_reg_poscache);
1289 free_tied_hv_pool();
1290 Safefree(PL_op_mask);
1291 Safefree(PL_psig_ptr);
1292 PL_psig_ptr = (SV**)NULL;
1293 Safefree(PL_psig_name);
1294 PL_psig_name = (SV**)NULL;
1295 Safefree(PL_bitcount);
1297 Safefree(PL_psig_pend);
1298 PL_psig_pend = (int*)NULL;
1301 PL_tainting = FALSE;
1302 PL_taint_warn = FALSE;
1303 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1306 DEBUG_P(debprofdump());
1308 #ifdef USE_REENTRANT_API
1309 Perl_reentrant_free(aTHX);
1314 while (PL_regmatch_slab) {
1315 regmatch_slab *s = PL_regmatch_slab;
1316 PL_regmatch_slab = PL_regmatch_slab->next;
1320 /* As the absolutely last thing, free the non-arena SV for mess() */
1323 /* we know that type == SVt_PVMG */
1325 /* it could have accumulated taint magic */
1328 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1329 moremagic = mg->mg_moremagic;
1330 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1332 Safefree(mg->mg_ptr);
1336 /* we know that type >= SVt_PV */
1337 SvPV_free(PL_mess_sv);
1338 Safefree(SvANY(PL_mess_sv));
1339 Safefree(PL_mess_sv);
1346 =for apidoc perl_free
1348 Releases a Perl interpreter. See L<perlembed>.
1358 if (PL_veto_cleanup)
1361 #ifdef PERL_TRACK_MEMPOOL
1364 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1365 * value as we're probably hunting memory leaks then
1367 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1368 if (!s || atoi(s) == 0) {
1369 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1370 thread at thread exit. */
1371 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1372 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1377 #if defined(WIN32) || defined(NETWARE)
1378 # if defined(PERL_IMPLICIT_SYS)
1381 void *host = nw_internal_host;
1383 void *host = w32_internal_host;
1385 PerlMem_free(aTHXx);
1387 nw_delete_internal_host(host);
1389 win32_delete_internal_host(host);
1393 PerlMem_free(aTHXx);
1396 PerlMem_free(aTHXx);
1400 #if defined(USE_ITHREADS)
1401 /* provide destructors to clean up the thread key when libperl is unloaded */
1402 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1404 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1405 #pragma fini "perl_fini"
1406 #elif defined(__sun) && !defined(__GNUC__)
1407 #pragma fini (perl_fini)
1411 #if defined(__GNUC__)
1412 __attribute__((destructor))
1417 if (PL_curinterp && !PL_veto_cleanup)
1422 #endif /* THREADS */
1425 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1428 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1429 PL_exitlist[PL_exitlistlen].fn = fn;
1430 PL_exitlist[PL_exitlistlen].ptr = ptr;
1434 #ifdef HAS_PROCSELFEXE
1435 /* This is a function so that we don't hold on to MAXPATHLEN
1436 bytes of stack longer than necessary
1439 S_procself_val(pTHX_ SV *sv, const char *arg0)
1441 char buf[MAXPATHLEN];
1442 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1444 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1445 includes a spurious NUL which will cause $^X to fail in system
1446 or backticks (this will prevent extensions from being built and
1447 many tests from working). readlink is not meant to add a NUL.
1448 Normal readlink works fine.
1450 if (len > 0 && buf[len-1] == '\0') {
1454 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1455 returning the text "unknown" from the readlink rather than the path
1456 to the executable (or returning an error from the readlink). Any valid
1457 path has a '/' in it somewhere, so use that to validate the result.
1458 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1460 if (len > 0 && memchr(buf, '/', len)) {
1461 sv_setpvn(sv,buf,len);
1467 #endif /* HAS_PROCSELFEXE */
1470 S_set_caret_X(pTHX) {
1472 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1474 #ifdef HAS_PROCSELFEXE
1475 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1478 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1480 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1487 =for apidoc perl_parse
1489 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1495 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1502 PERL_UNUSED_ARG(my_perl);
1504 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1507 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1508 setuid perl scripts securely.\n");
1509 #endif /* IAMSUID */
1512 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1513 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1514 * This MUST be done before any hash stores or fetches take place.
1515 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1516 * yourself, it is your responsibility to provide a good random seed!
1517 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1518 if (!PL_rehash_seed_set)
1519 PL_rehash_seed = get_hash_seed();
1521 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1523 if (s && (atoi(s) == 1))
1524 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1526 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1531 if (PL_origalen != 0) {
1532 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1535 /* Set PL_origalen be the sum of the contiguous argv[]
1536 * elements plus the size of the env in case that it is
1537 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1538 * as the maximum modifiable length of $0. In the worst case
1539 * the area we are able to modify is limited to the size of
1540 * the original argv[0]. (See below for 'contiguous', though.)
1542 const char *s = NULL;
1545 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1546 /* Do the mask check only if the args seem like aligned. */
1548 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1550 /* See if all the arguments are contiguous in memory. Note
1551 * that 'contiguous' is a loose term because some platforms
1552 * align the argv[] and the envp[]. If the arguments look
1553 * like non-aligned, assume that they are 'strictly' or
1554 * 'traditionally' contiguous. If the arguments look like
1555 * aligned, we just check that they are within aligned
1556 * PTRSIZE bytes. As long as no system has something bizarre
1557 * like the argv[] interleaved with some other data, we are
1558 * fine. (Did I just evoke Murphy's Law?) --jhi */
1559 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1561 for (i = 1; i < PL_origargc; i++) {
1562 if ((PL_origargv[i] == s + 1
1564 || PL_origargv[i] == s + 2
1569 (PL_origargv[i] > s &&
1571 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1582 #ifndef PERL_USE_SAFE_PUTENV
1583 /* Can we grab env area too to be used as the area for $0? */
1584 if (s && PL_origenviron && !PL_use_safe_putenv) {
1585 if ((PL_origenviron[0] == s + 1)
1588 (PL_origenviron[0] > s &&
1589 PL_origenviron[0] <=
1590 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1593 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1594 s = PL_origenviron[0];
1597 my_setenv("NoNe SuCh", NULL);
1598 /* Force copy of environment. */
1599 for (i = 1; PL_origenviron[i]; i++) {
1600 if (PL_origenviron[i] == s + 1
1603 (PL_origenviron[i] > s &&
1604 PL_origenviron[i] <=
1605 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1608 s = PL_origenviron[i];
1616 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1618 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1623 /* Come here if running an undumped a.out. */
1625 PL_origfilename = savepv(argv[0]);
1626 PL_do_undump = FALSE;
1627 cxstack_ix = -1; /* start label stack again */
1629 assert (!PL_tainted);
1631 S_set_caret_X(aTHX);
1633 init_postdump_symbols(argc,argv,env);
1638 op_free(PL_main_root);
1639 PL_main_root = NULL;
1641 PL_main_start = NULL;
1642 SvREFCNT_dec(PL_main_cv);
1646 oldscope = PL_scopestack_ix;
1647 PL_dowarn = G_WARN_OFF;
1652 parse_body(env,xsinit);
1654 call_list(oldscope, PL_unitcheckav);
1656 call_list(oldscope, PL_checkav);
1663 /* my_exit() was called */
1664 while (PL_scopestack_ix > oldscope)
1667 PL_curstash = PL_defstash;
1669 call_list(oldscope, PL_unitcheckav);
1671 call_list(oldscope, PL_checkav);
1675 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1684 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1688 int argc = PL_origargc;
1689 char **argv = PL_origargv;
1690 const char *scriptname = NULL;
1691 VOL bool dosearch = FALSE;
1692 const char *validarg = "";
1695 const char *cddir = NULL;
1696 #ifdef USE_SITECUSTOMIZE
1697 bool minus_f = FALSE;
1699 SV *linestr_sv = newSV_type(SVt_PVIV);
1700 bool add_read_e_script = FALSE;
1702 SvGROW(linestr_sv, 80);
1703 sv_setpvn(linestr_sv,"",0);
1705 sv = newSVpvs(""); /* first used for -I flags */
1711 for (argc--,argv++; argc > 0; argc--,argv++) {
1712 if (argv[0][0] != '-' || !argv[0][1])
1716 validarg = " PHOOEY ";
1720 * Can we rely on the kernel to start scripts with argv[1] set to
1721 * contain all #! line switches (the whole line)? (argv[0] is set to
1722 * the interpreter name, argv[2] to the script name; argv[3] and
1723 * above may contain other arguments.)
1730 #ifndef PERL_STRICT_CR
1754 if ((s = moreswitches(s)))
1759 CHECK_MALLOC_TOO_LATE_FOR('t');
1760 if( !PL_tainting ) {
1761 PL_taint_warn = TRUE;
1767 CHECK_MALLOC_TOO_LATE_FOR('T');
1769 PL_taint_warn = FALSE;
1777 #ifdef MACOS_TRADITIONAL
1778 /* ignore -e for Dev:Pseudo argument */
1779 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1782 forbid_setid('e', -1);
1784 PL_e_script = newSVpvs("");
1785 add_read_e_script = TRUE;
1788 sv_catpv(PL_e_script, s);
1790 sv_catpv(PL_e_script, argv[1]);
1794 Perl_croak(aTHX_ "No code specified for -%c", c);
1795 sv_catpvs(PL_e_script, "\n");
1799 #ifdef USE_SITECUSTOMIZE
1805 case 'I': /* -I handled both here and in moreswitches() */
1806 forbid_setid('I', -1);
1807 if (!*++s && (s=argv[1]) != NULL) {
1811 STRLEN len = strlen(s);
1812 const char * const p = savepvn(s, len);
1813 incpush(p, TRUE, TRUE, FALSE, FALSE);
1814 sv_catpvs(sv, "-I");
1815 sv_catpvn(sv, p, len);
1820 Perl_croak(aTHX_ "No directory specified for -I");
1823 forbid_setid('P', -1);
1824 PL_preprocess = TRUE;
1829 forbid_setid('S', -1);
1837 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1839 /* Can't do newSVpvs() as that would involve pre-processor
1840 condititionals inside a macro expansion. */
1841 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1848 # ifdef PERL_DONT_CREATE_GVSV
1849 " PERL_DONT_CREATE_GVSV"
1851 # ifdef PERL_MALLOC_WRAP
1854 # ifdef PERL_MEM_LOG
1857 # ifdef PERL_MEM_LOG_ENV
1860 # ifdef PERL_MEM_LOG_ENV_FD
1861 " PERL_MEM_LOG_ENV_FD"
1863 # ifdef PERL_MEM_LOG_STDERR
1864 " PERL_MEM_LOG_STDERR"
1866 # ifdef PERL_MEM_LOG_TIMESTAMP
1867 " PERL_MEM_LOG_TIMESTAMP"
1869 # ifdef PERL_USE_SAFE_PUTENV
1870 " PERL_USE_SAFE_PUTENV"
1872 # ifdef USE_SITECUSTOMIZE
1873 " USE_SITECUSTOMIZE"
1877 sv_catpv(opts_prog, PL_bincompat_options);
1878 /* Terminate the qw(, and then wrap at 76 columns. */
1879 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1881 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1883 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1886 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1888 #if defined(LOCAL_PATCH_COUNT)
1889 if (LOCAL_PATCH_COUNT > 0) {
1891 sv_catpvs(opts_prog,
1892 "\" Locally applied patches:\\n\",");
1893 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1894 if (PL_localpatches[i])
1895 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1896 0, PL_localpatches[i], 0);
1900 Perl_sv_catpvf(aTHX_ opts_prog,
1901 "\" Built under %s\\n",OSNAME);
1904 Perl_sv_catpvf(aTHX_ opts_prog,
1905 " Compiled at %s %s\\n\"",__DATE__,
1908 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1912 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1913 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1914 "sort grep {/^PERL/} keys %ENV; ");
1916 sv_catpvs(opts_prog,
1917 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1919 sv_catpvs(opts_prog,
1920 "print \" \\%ENV:\\n @env\\n\" if @env;"
1921 "print \" \\@INC:\\n @INC\\n\";");
1925 opts_prog = Perl_newSVpvf(aTHX_
1926 "Config::config_vars(qw%c%s%c)",
1930 av_push(PL_preambleav, opts_prog);
1931 /* don't look for script or read stdin */
1932 scriptname = BIT_BUCKET;
1936 PL_doextract = TRUE;
1944 if (!*++s || isSPACE(*s)) {
1948 /* catch use of gnu style long options */
1949 if (strEQ(s, "version")) {
1953 if (strEQ(s, "help")) {
1960 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1971 #ifndef SECURE_INTERNAL_GETENV
1974 (s = PerlEnv_getenv("PERL5OPT")))
1976 const char *popt = s;
1979 if (*s == '-' && *(s+1) == 'T') {
1980 CHECK_MALLOC_TOO_LATE_FOR('T');
1982 PL_taint_warn = FALSE;
1985 char *popt_copy = NULL;
1998 if (!strchr("CDIMUdmtw", *s))
1999 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2003 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2004 s = popt_copy + (s - popt);
2005 d = popt_copy + (d - popt);
2012 if( !PL_tainting ) {
2013 PL_taint_warn = TRUE;
2024 #ifdef USE_SITECUSTOMIZE
2026 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2027 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2032 scriptname = argv[0];
2035 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2037 else if (scriptname == NULL) {
2039 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2045 /* Set $^X early so that it can be used for relocatable paths in @INC */
2046 assert (!PL_tainted);
2048 S_set_caret_X(aTHX);
2055 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2057 validate_suid(validarg, scriptname, fdscript, suidscript,
2061 # if defined(SIGCHLD) || defined(SIGCLD)
2064 # define SIGCHLD SIGCLD
2066 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2067 if (sigstate == (Sighandler_t) SIG_IGN) {
2068 if (ckWARN(WARN_SIGNAL))
2069 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2070 "Can't ignore signal CHLD, forcing to default");
2071 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2078 #ifdef MACOS_TRADITIONAL
2079 || gMacPerl_AlwaysExtract
2083 /* This will croak if suidscript is >= 0, as -x cannot be used with
2085 forbid_setid('x', suidscript);
2086 /* Hence you can't get here if suidscript >= 0 */
2088 find_beginning(linestr_sv, rsfp);
2089 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2090 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2094 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2095 CvUNIQUE_on(PL_compcv);
2097 CvPADLIST(PL_compcv) = pad_new(0);
2099 PL_isarev = newHV();
2102 boot_core_UNIVERSAL();
2103 boot_core_xsutils();
2107 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2109 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2115 # ifdef HAS_SOCKS5_INIT
2116 socks5_init(argv[0]);
2122 init_predump_symbols();
2123 /* init_postdump_symbols not currently designed to be called */
2124 /* more than once (ENV isn't cleared first, for example) */
2125 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2127 init_postdump_symbols(argc,argv,env);
2129 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2130 * or explicitly in some platforms.
2131 * locale.c:Perl_init_i18nl10n() if the environment
2132 * look like the user wants to use UTF-8. */
2133 #if defined(__SYMBIAN32__)
2134 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2137 /* Requires init_predump_symbols(). */
2138 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2143 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2144 * and the default open disciplines. */
2145 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2146 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2148 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2149 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2150 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2152 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2153 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2154 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2156 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2157 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2158 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2160 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2161 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2164 sv_setpvn(sv, ":utf8\0:utf8", 11);
2166 sv_setpvn(sv, ":utf8\0", 6);
2169 sv_setpvn(sv, "\0:utf8", 6);
2177 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2178 if (strEQ(s, "unsafe"))
2179 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2180 else if (strEQ(s, "safe"))
2181 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2183 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2190 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2194 PL_xmlfp = PerlIO_stdout();
2196 PL_xmlfp = PerlIO_open(s, "w");
2198 Perl_croak(aTHX_ "Can't open %s", s);
2200 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2206 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2207 PL_madskills = atoi(s);
2208 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2213 lex_start(linestr_sv, rsfp, TRUE);
2214 PL_subname = newSVpvs("main");
2216 if (add_read_e_script)
2217 filter_add(read_e_script, NULL);
2219 /* now parse the script */
2221 SETERRNO(0,SS_NORMAL);
2222 #ifdef MACOS_TRADITIONAL
2223 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2225 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2227 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2228 MacPerl_MPWFileName(PL_origfilename));
2232 if (yyparse() || PL_parser->error_count) {
2234 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2236 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2241 CopLINE_set(PL_curcop, 0);
2242 PL_curstash = PL_defstash;
2243 PL_preprocess = FALSE;
2245 SvREFCNT_dec(PL_e_script);
2253 SAVECOPFILE(PL_curcop);
2254 SAVECOPLINE(PL_curcop);
2255 gv_check(PL_defstash);
2264 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2265 dump_mstats("after compilation:");
2275 =for apidoc perl_run
2277 Tells a Perl interpreter to run. See L<perlembed>.
2290 PERL_UNUSED_ARG(my_perl);
2292 oldscope = PL_scopestack_ix;
2300 cxstack_ix = -1; /* start context stack again */
2302 case 0: /* normal completion */
2306 case 2: /* my_exit() */
2307 while (PL_scopestack_ix > oldscope)
2310 PL_curstash = PL_defstash;
2311 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2312 PL_endav && !PL_minus_c)
2313 call_list(oldscope, PL_endav);
2315 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2316 dump_mstats("after execution: ");
2322 POPSTACK_TO(PL_mainstack);
2325 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2336 S_run_body(pTHX_ I32 oldscope)
2339 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2340 PL_sawampersand ? "Enabling" : "Omitting"));
2342 if (!PL_restartop) {
2346 exit(0); /* less likely to core dump than my_exit(0) */
2349 DEBUG_x(dump_all());
2352 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2354 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2358 #ifdef MACOS_TRADITIONAL
2359 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2360 (gMacPerl_ErrorFormat ? "# " : ""),
2361 MacPerl_MPWFileName(PL_origfilename));
2363 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2367 if (PERLDB_SINGLE && PL_DBsingle)
2368 sv_setiv(PL_DBsingle, 1);
2370 call_list(oldscope, PL_initav);
2371 #ifdef PERL_DEBUG_READONLY_OPS
2372 Perl_pending_Slabs_to_ro(aTHX);
2379 PL_op = PL_restartop;
2383 else if (PL_main_start) {
2384 CvDEPTH(PL_main_cv) = 1;
2385 PL_op = PL_main_start;
2393 =head1 SV Manipulation Functions
2395 =for apidoc p||get_sv
2397 Returns the SV of the specified Perl scalar. If C<create> is set and the
2398 Perl variable does not exist then it will be created. If C<create> is not
2399 set and the variable does not exist then NULL is returned.
2405 Perl_get_sv(pTHX_ const char *name, I32 create)
2408 gv = gv_fetchpv(name, create, SVt_PV);
2415 =head1 Array Manipulation Functions
2417 =for apidoc p||get_av
2419 Returns the AV of the specified Perl array. If C<create> is set and the
2420 Perl variable does not exist then it will be created. If C<create> is not
2421 set and the variable does not exist then NULL is returned.
2427 Perl_get_av(pTHX_ const char *name, I32 create)
2429 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2438 =head1 Hash Manipulation Functions
2440 =for apidoc p||get_hv
2442 Returns the HV of the specified Perl hash. If C<create> is set and the
2443 Perl variable does not exist then it will be created. If C<create> is not
2444 set and the variable does not exist then NULL is returned.
2450 Perl_get_hv(pTHX_ const char *name, I32 create)
2452 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2461 =head1 CV Manipulation Functions
2463 =for apidoc p||get_cvn_flags
2465 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2466 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2467 exist then it will be declared (which has the same effect as saying
2468 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2469 then NULL is returned.
2471 =for apidoc p||get_cv
2473 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2479 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2481 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2482 /* XXX this is probably not what they think they're getting.
2483 * It has the same effect as "sub name;", i.e. just a forward
2485 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2486 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2487 return newSUB(start_subparse(FALSE, 0),
2488 newSVOP(OP_CONST, 0, sv),
2497 Perl_get_cv(pTHX_ const char *name, I32 flags)
2499 return get_cvn_flags(name, strlen(name), flags);
2502 /* Be sure to refetch the stack pointer after calling these routines. */
2506 =head1 Callback Functions
2508 =for apidoc p||call_argv
2510 Performs a callback to the specified Perl sub. See L<perlcall>.
2516 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2518 /* See G_* flags in cop.h */
2519 /* null terminated arg list */
2527 mXPUSHs(newSVpv(*argv,0));
2532 return call_pv(sub_name, flags);
2536 =for apidoc p||call_pv
2538 Performs a callback to the specified Perl sub. See L<perlcall>.
2544 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2545 /* name of the subroutine */
2546 /* See G_* flags in cop.h */
2548 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2552 =for apidoc p||call_method
2554 Performs a callback to the specified Perl method. The blessed object must
2555 be on the stack. See L<perlcall>.
2561 Perl_call_method(pTHX_ const char *methname, I32 flags)
2562 /* name of the subroutine */
2563 /* See G_* flags in cop.h */
2565 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2568 /* May be called with any of a CV, a GV, or an SV containing the name. */
2570 =for apidoc p||call_sv
2572 Performs a callback to the Perl sub whose name is in the SV. See
2579 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2580 /* See G_* flags in cop.h */
2583 LOGOP myop; /* fake syntax tree node */
2588 bool oldcatch = CATCH_GET;
2590 OP* const oldop = PL_op;
2593 if (flags & G_DISCARD) {
2598 Zero(&myop, 1, LOGOP);
2599 myop.op_next = NULL;
2600 if (!(flags & G_NOARGS))
2601 myop.op_flags |= OPf_STACKED;
2602 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2603 (flags & G_ARRAY) ? OPf_WANT_LIST :
2608 EXTEND(PL_stack_sp, 1);
2609 *++PL_stack_sp = sv;
2611 oldscope = PL_scopestack_ix;
2613 if (PERLDB_SUB && PL_curstash != PL_debstash
2614 /* Handle first BEGIN of -d. */
2615 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2616 /* Try harder, since this may have been a sighandler, thus
2617 * curstash may be meaningless. */
2618 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2619 && !(flags & G_NODEBUG))
2620 PL_op->op_private |= OPpENTERSUB_DB;
2622 if (flags & G_METHOD) {
2623 Zero(&method_op, 1, UNOP);
2624 method_op.op_next = PL_op;
2625 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2626 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2627 PL_op = (OP*)&method_op;
2630 if (!(flags & G_EVAL)) {
2632 CALL_BODY_SUB((OP*)&myop);
2633 retval = PL_stack_sp - (PL_stack_base + oldmark);
2634 CATCH_SET(oldcatch);
2637 myop.op_other = (OP*)&myop;
2639 create_eval_scope(flags|G_FAKINGEVAL);
2647 CALL_BODY_SUB((OP*)&myop);
2648 retval = PL_stack_sp - (PL_stack_base + oldmark);
2649 if (!(flags & G_KEEPERR))
2650 sv_setpvn(ERRSV,"",0);
2656 /* my_exit() was called */
2657 PL_curstash = PL_defstash;
2660 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2661 Perl_croak(aTHX_ "Callback called exit");
2666 PL_op = PL_restartop;
2670 PL_stack_sp = PL_stack_base + oldmark;
2671 if (flags & G_ARRAY)
2675 *++PL_stack_sp = &PL_sv_undef;
2680 if (PL_scopestack_ix > oldscope)
2681 delete_eval_scope();
2685 if (flags & G_DISCARD) {
2686 PL_stack_sp = PL_stack_base + oldmark;
2695 /* Eval a string. The G_EVAL flag is always assumed. */
2698 =for apidoc p||eval_sv
2700 Tells Perl to C<eval> the string in the SV.
2706 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2708 /* See G_* flags in cop.h */
2712 UNOP myop; /* fake syntax tree node */
2713 VOL I32 oldmark = SP - PL_stack_base;
2716 OP* const oldop = PL_op;
2719 if (flags & G_DISCARD) {
2726 Zero(PL_op, 1, UNOP);
2727 EXTEND(PL_stack_sp, 1);
2728 *++PL_stack_sp = sv;
2730 if (!(flags & G_NOARGS))
2731 myop.op_flags = OPf_STACKED;
2732 myop.op_next = NULL;
2733 myop.op_type = OP_ENTEREVAL;
2734 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2735 (flags & G_ARRAY) ? OPf_WANT_LIST :
2737 if (flags & G_KEEPERR)
2738 myop.op_flags |= OPf_SPECIAL;
2740 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2741 * before a PUSHEVAL, which corrupts the stack after a croak */
2742 TAINT_PROPER("eval_sv()");
2748 CALL_BODY_EVAL((OP*)&myop);
2749 retval = PL_stack_sp - (PL_stack_base + oldmark);
2750 if (!(flags & G_KEEPERR))
2751 sv_setpvn(ERRSV,"",0);
2757 /* my_exit() was called */
2758 PL_curstash = PL_defstash;
2761 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2762 Perl_croak(aTHX_ "Callback called exit");
2767 PL_op = PL_restartop;
2771 PL_stack_sp = PL_stack_base + oldmark;
2772 if (flags & G_ARRAY)
2776 *++PL_stack_sp = &PL_sv_undef;
2782 if (flags & G_DISCARD) {
2783 PL_stack_sp = PL_stack_base + oldmark;
2793 =for apidoc p||eval_pv
2795 Tells Perl to C<eval> the given string and return an SV* result.
2801 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2805 SV* sv = newSVpv(p, 0);
2807 eval_sv(sv, G_SCALAR);
2814 if (croak_on_error && SvTRUE(ERRSV)) {
2815 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2821 /* Require a module. */
2824 =head1 Embedding Functions
2826 =for apidoc p||require_pv
2828 Tells Perl to C<require> the file named by the string argument. It is
2829 analogous to the Perl code C<eval "require '$file'">. It's even
2830 implemented that way; consider using load_module instead.
2835 Perl_require_pv(pTHX_ const char *pv)
2840 PUSHSTACKi(PERLSI_REQUIRE);
2842 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2843 eval_sv(sv_2mortal(sv), G_DISCARD);
2849 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2851 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2854 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2858 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2860 /* This message really ought to be max 23 lines.
2861 * Removed -h because the user already knows that option. Others? */
2863 static const char * const usage_msg[] = {
2864 "-0[octal] specify record separator (\\0, if no argument)",
2865 "-a autosplit mode with -n or -p (splits $_ into @F)",
2866 "-C[number/list] enables the listed Unicode features",
2867 "-c check syntax only (runs BEGIN and CHECK blocks)",
2868 "-d[:debugger] run program under debugger",
2869 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2870 "-e program one line of program (several -e's allowed, omit programfile)",
2871 "-E program like -e, but enables all optional features",
2872 "-f don't do $sitelib/sitecustomize.pl at startup",
2873 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2874 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2875 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2876 "-l[octal] enable line ending processing, specifies line terminator",
2877 "-[mM][-]module execute \"use/no module...\" before executing program",
2878 "-n assume \"while (<>) { ... }\" loop around program",
2879 "-p assume loop like -n but print line also, like sed",
2880 "-P run program through C preprocessor before compilation",
2881 "-s enable rudimentary parsing for switches after programfile",
2882 "-S look for programfile using PATH environment variable",
2883 "-t enable tainting warnings",
2884 "-T enable tainting checks",
2885 "-u dump core after parsing program",
2886 "-U allow unsafe operations",
2887 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2888 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2889 "-w enable many useful warnings (RECOMMENDED)",
2890 "-W enable all warnings",
2891 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2892 "-X disable all warnings",
2896 const char * const *p = usage_msg;
2898 PerlIO_printf(PerlIO_stdout(),
2899 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2902 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2905 /* convert a string of -D options (or digits) into an int.
2906 * sets *s to point to the char after the options */
2910 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2912 static const char * const usage_msgd[] = {
2913 " Debugging flag values: (see also -d)",
2914 " p Tokenizing and parsing (with v, displays parse stack)",
2915 " s Stack snapshots (with v, displays all stacks)",
2916 " l Context (loop) stack processing",
2917 " t Trace execution",
2918 " o Method and overloading resolution",
2919 " c String/numeric conversions",
2920 " P Print profiling info, preprocessor command for -P, source file input state",
2921 " m Memory allocation",
2922 " f Format processing",
2923 " r Regular expression parsing and execution",
2924 " x Syntax tree dump",
2925 " u Tainting checks",
2926 " H Hash dump -- usurps values()",
2927 " X Scratchpad allocation",
2929 " S Thread synchronization",
2931 " R Include reference counts of dumped variables (eg when using -Ds)",
2932 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2933 " v Verbose: use in conjunction with other flags",
2935 " A Consistency checks on internal structures",
2936 " q quiet - currently only suppresses the 'EXECUTING' message",
2941 /* if adding extra options, remember to update DEBUG_MASK */
2942 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2944 for (; isALNUM(**s); (*s)++) {
2945 const char * const d = strchr(debopts,**s);
2947 i |= 1 << (d - debopts);
2948 else if (ckWARN_d(WARN_DEBUGGING))
2949 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2950 "invalid option -D%c, use -D'' to see choices\n", **s);
2953 else if (isDIGIT(**s)) {
2955 for (; isALNUM(**s); (*s)++) ;
2957 else if (givehelp) {
2958 const char *const *p = usage_msgd;
2959 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2962 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2963 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2964 "-Dp not implemented on this platform\n");
2970 /* This routine handles any switches that can be given during run */
2973 Perl_moreswitches(pTHX_ const char *s)
2984 SvREFCNT_dec(PL_rs);
2985 if (s[1] == 'x' && s[2]) {
2986 const char *e = s+=2;
2992 flags = PERL_SCAN_SILENT_ILLDIGIT;
2993 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2994 if (s + numlen < e) {
2995 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2999 PL_rs = newSVpvs("");
3000 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3001 tmps = (U8*)SvPVX(PL_rs);
3002 uvchr_to_utf8(tmps, rschar);
3003 SvCUR_set(PL_rs, UNISKIP(rschar));
3008 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3009 if (rschar & ~((U8)~0))
3010 PL_rs = &PL_sv_undef;
3011 else if (!rschar && numlen >= 2)
3012 PL_rs = newSVpvs("");
3014 char ch = (char)rschar;
3015 PL_rs = newSVpvn(&ch, 1);
3018 sv_setsv(get_sv("/", TRUE), PL_rs);
3023 PL_unicode = parse_unicode_opts( (const char **)&s );
3024 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3030 while (*s && !isSPACE(*s)) ++s;
3031 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3042 forbid_setid('d', -1);
3045 /* -dt indicates to the debugger that threads will be used */
3046 if (*s == 't' && !isALNUM(s[1])) {
3048 my_setenv("PERL5DB_THREADED", "1");
3051 /* The following permits -d:Mod to accepts arguments following an =
3052 in the fashion that -MSome::Mod does. */
3053 if (*s == ':' || *s == '=') {
3054 const char *start = ++s;
3055 const char *const end = s + strlen(s);
3056 SV * const sv = newSVpvs("use Devel::");
3058 /* We now allow -d:Module=Foo,Bar */
3059 while(isALNUM(*s) || *s==':') ++s;
3061 sv_catpvn(sv, start, end - start);
3063 sv_catpvn(sv, start, s-start);
3064 /* Don't use NUL as q// delimiter here, this string goes in the
3066 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3069 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3073 PL_perldb = PERLDB_ALL;
3080 forbid_setid('D', -1);
3082 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3083 #else /* !DEBUGGING */
3084 if (ckWARN_d(WARN_DEBUGGING))
3085 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3086 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3087 for (s++; isALNUM(*s); s++) ;
3092 usage(PL_origargv[0]);
3095 Safefree(PL_inplace);
3096 #if defined(__CYGWIN__) /* do backup extension automagically */
3097 if (*(s+1) == '\0') {
3098 PL_inplace = savepvs(".bak");
3101 #endif /* __CYGWIN__ */
3103 const char * const start = ++s;
3104 while (*s && !isSPACE(*s))
3107 PL_inplace = savepvn(start, s - start);
3111 if (*s == '-') /* Additional switches on #! line. */
3115 case 'I': /* -I handled both here and in parse_body() */
3116 forbid_setid('I', -1);
3118 while (*s && isSPACE(*s))
3123 /* ignore trailing spaces (possibly followed by other switches) */
3125 for (e = p; *e && !isSPACE(*e); e++) ;
3129 } while (*p && *p != '-');
3130 e = savepvn(s, e-s);
3131 incpush(e, TRUE, TRUE, FALSE, FALSE);
3138 Perl_croak(aTHX_ "No directory specified for -I");
3144 SvREFCNT_dec(PL_ors_sv);
3150 PL_ors_sv = newSVpvs("\n");
3151 numlen = 3 + (*s == '0');
3152 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3156 if (RsPARA(PL_rs)) {
3157 PL_ors_sv = newSVpvs("\n\n");
3160 PL_ors_sv = newSVsv(PL_rs);
3165 forbid_setid('M', -1); /* XXX ? */
3168 forbid_setid('m', -1); /* XXX ? */
3173 const char *use = "use ";
3174 /* -M-foo == 'no foo' */
3175 /* Leading space on " no " is deliberate, to make both
3176 possibilities the same length. */
3177 if (*s == '-') { use = " no "; ++s; }
3178 sv = newSVpvn(use,4);
3180 /* We allow -M'Module qw(Foo Bar)' */
3181 while(isALNUM(*s) || *s==':') ++s;
3182 end = s + strlen(s);
3184 sv_catpvn(sv, start, end - start);
3185 if (*(start-1) == 'm') {
3187 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3188 sv_catpvs( sv, " ()");
3192 Perl_croak(aTHX_ "Module name required with -%c option",
3194 sv_catpvn(sv, start, s-start);
3195 /* Use NUL as q''-delimiter. */
3196 sv_catpvs(sv, " split(/,/,q\0");
3198 sv_catpvn(sv, s, end - s);
3199 sv_catpvs(sv, "\0)");
3202 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3205 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3216 forbid_setid('s', -1);
3217 PL_doswitches = TRUE;
3231 #ifdef MACOS_TRADITIONAL
3232 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3234 PL_do_undump = TRUE;
3242 if (!sv_derived_from(PL_patchlevel, "version"))
3243 upg_version(PL_patchlevel, TRUE);
3245 PerlIO_printf(PerlIO_stdout(),
3246 Perl_form(aTHX_ "\nThis is perl, %"SVf
3247 #ifdef PERL_PATCHNUM
3248 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3251 SVfARG(vstringify(PL_patchlevel)),
3254 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3255 PerlIO_printf(PerlIO_stdout(),
3256 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3257 SVfARG(vstringify(PL_patchlevel))));
3258 PerlIO_printf(PerlIO_stdout(),
3259 Perl_form(aTHX_ " built under %s at %s %s\n",
3260 OSNAME, __DATE__, __TIME__));
3261 PerlIO_printf(PerlIO_stdout(),
3262 Perl_form(aTHX_ " OS Specific Release: %s\n",
3266 #if defined(LOCAL_PATCH_COUNT)
3267 if (LOCAL_PATCH_COUNT > 0)
3268 PerlIO_printf(PerlIO_stdout(),
3269 "\n(with %d registered patch%s, "
3270 "see perl -V for more detail)",
3272 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "\n\nCopyright 1987-2007, Larry Wall\n");
3277 #ifdef MACOS_TRADITIONAL
3278 PerlIO_printf(PerlIO_stdout(),
3279 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3280 "maintained by Chris Nandor\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3289 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3294 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "atariST series port, ++jrb bammi@cadence.com\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3325 PerlIO_printf(PerlIO_stdout(),
3326 "MiNT port by Guido Flohr, 1997-1999\n");
3329 PerlIO_printf(PerlIO_stdout(),
3330 "EPOC port by Olaf Flebbe, 1999-2002\n");
3333 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3334 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3337 #ifdef __SYMBIAN32__
3338 PerlIO_printf(PerlIO_stdout(),
3339 "Symbian port by Nokia, 2004-2005\n");
3341 #ifdef BINARY_BUILD_NOTICE
3342 BINARY_BUILD_NOTICE;
3344 PerlIO_printf(PerlIO_stdout(),
3346 Perl may be copied only under the terms of either the Artistic License or the\n\
3347 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3348 Complete documentation for Perl, including FAQ lists, should be found on\n\
3349 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3350 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3353 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3354 PL_dowarn |= G_WARN_ON;
3359 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3360 if (!specialWARN(PL_compiling.cop_warnings))
3361 PerlMemShared_free(PL_compiling.cop_warnings);
3362 PL_compiling.cop_warnings = pWARN_ALL ;
3366 PL_dowarn = G_WARN_ALL_OFF;
3367 if (!specialWARN(PL_compiling.cop_warnings))
3368 PerlMemShared_free(PL_compiling.cop_warnings);
3369 PL_compiling.cop_warnings = pWARN_NONE ;
3374 if (s[1] == '-') /* Additional switches on #! line. */
3379 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3385 #ifdef ALTERNATE_SHEBANG
3386 case 'S': /* OS/2 needs -S on "extproc" line. */
3394 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3399 /* compliments of Tom Christiansen */
3401 /* unexec() can be found in the Gnu emacs distribution */
3402 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3405 Perl_my_unexec(pTHX)
3407 PERL_UNUSED_CONTEXT;
3409 SV * prog = newSVpv(BIN_EXP, 0);
3410 SV * file = newSVpv(PL_origfilename, 0);
3414 sv_catpvs(prog, "/perl");
3415 sv_catpvs(file, ".perldump");
3417 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3418 /* unexec prints msg to stderr in case of failure */
3419 PerlProc_exit(status);
3422 # include <lib$routines.h>
3423 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3424 # elif defined(WIN32) || defined(__CYGWIN__)
3425 Perl_croak(aTHX_ "dump is not supported");
3427 ABORT(); /* for use with undump */
3432 /* initialize curinterp */
3438 # define PERLVAR(var,type)
3439 # define PERLVARA(var,n,type)
3440 # if defined(PERL_IMPLICIT_CONTEXT)
3441 # define PERLVARI(var,type,init) aTHX->var = init;
3442 # define PERLVARIC(var,type,init) aTHX->var = init;
3444 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3445 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3447 # include "intrpvar.h"
3453 # define PERLVAR(var,type)
3454 # define PERLVARA(var,n,type)
3455 # define PERLVARI(var,type,init) PL_##var = init;
3456 # define PERLVARIC(var,type,init) PL_##var = init;
3457 # include "intrpvar.h"
3464 /* As these are inside a structure, PERLVARI isn't capable of initialising
3466 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3467 PL_reg_poscache = PL_reg_starttry = NULL;
3471 S_init_main_stash(pTHX)
3476 PL_curstash = PL_defstash = newHV();
3477 /* We know that the string "main" will be in the global shared string
3478 table, so it's a small saving to use it rather than allocate another
3480 PL_curstname = newSVpvs_share("main");
3481 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3482 /* If we hadn't caused another reference to "main" to be in the shared
3483 string table above, then it would be worth reordering these two,
3484 because otherwise all we do is delete "main" from it as a consequence
3485 of the SvREFCNT_dec, only to add it again with hv_name_set */
3486 SvREFCNT_dec(GvHV(gv));
3487 hv_name_set(PL_defstash, "main", 4, 0);
3488 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3490 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3492 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3493 GvMULTI_on(PL_incgv);
3494 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3495 GvMULTI_on(PL_hintgv);
3496 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3497 SvREFCNT_inc_simple_void(PL_defgv);
3498 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3499 SvREFCNT_inc_simple_void(PL_errgv);
3500 GvMULTI_on(PL_errgv);
3501 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3502 GvMULTI_on(PL_replgv);
3503 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3504 #ifdef PERL_DONT_CREATE_GVSV
3507 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3508 sv_setpvn(ERRSV, "", 0);
3509 PL_curstash = PL_defstash;
3510 CopSTASH_set(&PL_compiling, PL_defstash);
3511 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3512 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3514 /* We must init $/ before switches are processed. */
3515 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3519 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3520 int *suidscript, PerlIO **rsfpp)
3525 const char *cpp_discard_flag;
3534 PL_origfilename = savepvs("-e");
3537 /* if find_script() returns, it returns a malloc()-ed value */
3538 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3540 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3541 const char *s = scriptname + 8;
3547 * Tell apart "normal" usage of fdscript, e.g.
3548 * with bash on FreeBSD:
3549 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3550 * from usage in suidperl.
3551 * Does any "normal" usage leave garbage after the number???
3552 * Is it a mistake to use a similar /dev/fd/ construct for
3557 * Be supersafe and do some sanity-checks.
3558 * Still, can we be sure we got the right thing?
3561 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3564 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3566 scriptname = savepv(s + 1);
3567 Safefree(PL_origfilename);
3568 PL_origfilename = (char *)scriptname;
3573 CopFILE_free(PL_curcop);
3574 CopFILE_set(PL_curcop, PL_origfilename);
3575 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3576 scriptname = (char *)"";
3577 if (fdscript >= 0) {
3578 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3579 # if defined(HAS_FCNTL) && defined(F_SETFD)
3581 /* ensure close-on-exec */
3582 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3587 Perl_croak(aTHX_ "sperl needs fd script\n"
3588 "You should not call sperl directly; do you need to "
3589 "change a #! line\nfrom sperl to perl?\n");
3592 * Do not open (or do other fancy stuff) while setuid.
3593 * Perl does the open, and hands script to suidperl on a fd;
3594 * suidperl only does some checks, sets up UIDs and re-execs
3595 * perl with that fd as it has always done.
3598 if (*suidscript != 1) {
3599 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3602 else if (PL_preprocess) {
3603 const char * const cpp_cfg = CPPSTDIN;
3604 SV * const cpp = newSVpvs("");
3605 SV * const cmd = newSV(0);
3607 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3608 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3609 if (strEQ(cpp_cfg, "cppstdin"))
3610 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3611 sv_catpv(cpp, cpp_cfg);
3614 sv_catpvs(sv, "-I");
3615 sv_catpv(sv,PRIVLIB_EXP);
3618 DEBUG_P(PerlIO_printf(Perl_debug_log,
3619 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3620 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3623 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3630 cpp_discard_flag = "";
3632 cpp_discard_flag = "-C";
3636 perl = os2_execname(aTHX);
3638 perl = PL_origargv[0];
3642 /* This strips off Perl comments which might interfere with
3643 the C pre-processor, including #!. #line directives are
3644 deliberately stripped to avoid confusion with Perl's version
3645 of #line. FWP played some golf with it so it will fit
3646 into VMS's 255 character buffer.
3649 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3651 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3653 Perl_sv_setpvf(aTHX_ cmd, "\
3654 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3655 perl, quote, code, quote, scriptname, SVfARG(cpp),
3656 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3658 PL_doextract = FALSE;
3660 DEBUG_P(PerlIO_printf(Perl_debug_log,
3661 "PL_preprocess: cmd=\"%s\"\n",
3664 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3668 else if (!*scriptname) {
3669 forbid_setid(0, *suidscript);
3670 *rsfpp = PerlIO_stdin();
3673 #ifdef FAKE_BIT_BUCKET
3674 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3675 * is called) and still have the "-e" work. (Believe it or not,
3676 * a /dev/null is required for the "-e" to work because source
3677 * filter magic is used to implement it. ) This is *not* a general
3678 * replacement for a /dev/null. What we do here is create a temp
3679 * file (an empty file), open up that as the script, and then
3680 * immediately close and unlink it. Close enough for jazz. */
3681 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3682 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3683 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3684 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3685 FAKE_BIT_BUCKET_TEMPLATE
3687 const char * const err = "Failed to create a fake bit bucket";
3688 if (strEQ(scriptname, BIT_BUCKET)) {
3689 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3690 int tmpfd = mkstemp(tmpname);
3692 scriptname = tmpname;
3695 Perl_croak(aTHX_ err);
3698 scriptname = mktemp(tmpname);
3700 Perl_croak(aTHX_ err);
3705 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3706 #ifdef FAKE_BIT_BUCKET
3707 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3708 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3709 && strlen(scriptname) == sizeof(tmpname) - 1) {
3712 scriptname = BIT_BUCKET;
3714 # if defined(HAS_FCNTL) && defined(F_SETFD)
3716 /* ensure close-on-exec */
3717 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3720 #endif /* IAMSUID */
3722 /* PSz 16 Sep 03 Keep neat error message */
3724 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3726 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3727 CopFILE(PL_curcop), Strerror(errno));
3733 * I_SYSSTATVFS HAS_FSTATVFS
3735 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3736 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3737 * here so that metaconfig picks them up. */
3741 S_fd_on_nosuid_fs(pTHX_ int fd)
3744 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3745 * but is needed also on machines without setreuid.
3746 * Seems safe enough to run as root.
3748 int check_okay = 0; /* able to do all the required sys/libcalls */
3749 int on_nosuid = 0; /* the fd is on a nosuid fs */
3751 * Need to check noexec also: nosuid might not be set, the average
3752 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3754 int on_noexec = 0; /* the fd is on a noexec fs */
3757 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3758 * fstatvfs() is UNIX98.
3759 * fstatfs() is 4.3 BSD.
3760 * ustat()+getmnt() is pre-4.3 BSD.
3761 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3762 * an irrelevant filesystem while trying to reach the right one.
3765 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3767 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3768 defined(HAS_FSTATVFS)
3769 # define FD_ON_NOSUID_CHECK_OKAY
3770 struct statvfs stfs;
3772 check_okay = fstatvfs(fd, &stfs) == 0;
3773 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3775 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3776 on platforms where it is present. */
3777 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3779 # endif /* fstatvfs */
3781 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3782 defined(PERL_MOUNT_NOSUID) && \
3783 defined(PERL_MOUNT_NOEXEC) && \
3784 defined(HAS_FSTATFS) && \
3785 defined(HAS_STRUCT_STATFS) && \
3786 defined(HAS_STRUCT_STATFS_F_FLAGS)
3787 # define FD_ON_NOSUID_CHECK_OKAY
3790 check_okay = fstatfs(fd, &stfs) == 0;
3791 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3792 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3793 # endif /* fstatfs */
3795 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3796 defined(PERL_MOUNT_NOSUID) && \
3797 defined(PERL_MOUNT_NOEXEC) && \
3798 defined(HAS_FSTAT) && \
3799 defined(HAS_USTAT) && \
3800 defined(HAS_GETMNT) && \
3801 defined(HAS_STRUCT_FS_DATA) && \
3803 # define FD_ON_NOSUID_CHECK_OKAY
3806 if (fstat(fd, &fdst) == 0) {
3808 if (ustat(fdst.st_dev, &us) == 0) {
3810 /* NOSTAT_ONE here because we're not examining fields which
3811 * vary between that case and STAT_ONE. */
3812 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3813 size_t cmplen = sizeof(us.f_fname);
3814 if (sizeof(fsd.fd_req.path) < cmplen)
3815 cmplen = sizeof(fsd.fd_req.path);
3816 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3817 fdst.st_dev == fsd.fd_req.dev) {
3819 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3820 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3825 # endif /* fstat+ustat+getmnt */
3827 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3828 defined(HAS_GETMNTENT) && \
3829 defined(HAS_HASMNTOPT) && \
3830 defined(MNTOPT_NOSUID) && \
3831 defined(MNTOPT_NOEXEC)
3832 # define FD_ON_NOSUID_CHECK_OKAY
3833 FILE *mtab = fopen("/etc/mtab", "r");
3834 struct mntent *entry;
3837 if (mtab && (fstat(fd, &stb) == 0)) {
3838 while (entry = getmntent(mtab)) {
3839 if (stat(entry->mnt_dir, &fsb) == 0
3840 && fsb.st_dev == stb.st_dev)
3842 /* found the filesystem */
3844 if (hasmntopt(entry, MNTOPT_NOSUID))
3846 if (hasmntopt(entry, MNTOPT_NOEXEC))
3849 } /* A single fs may well fail its stat(). */
3854 # endif /* getmntent+hasmntopt */
3857 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3859 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3861 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3862 return ((!check_okay) || on_nosuid || on_noexec);
3864 #endif /* IAMSUID */
3867 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3868 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3873 #endif /* IAMSUID */
3875 /* do we need to emulate setuid on scripts? */
3877 /* This code is for those BSD systems that have setuid #! scripts disabled
3878 * in the kernel because of a security problem. Merely defining DOSUID
3879 * in perl will not fix that problem, but if you have disabled setuid
3880 * scripts in the kernel, this will attempt to emulate setuid and setgid
3881 * on scripts that have those now-otherwise-useless bits set. The setuid
3882 * root version must be called suidperl or sperlN.NNN. If regular perl
3883 * discovers that it has opened a setuid script, it calls suidperl with
3884 * the same argv that it had. If suidperl finds that the script it has
3885 * just opened is NOT setuid root, it sets the effective uid back to the
3886 * uid. We don't just make perl setuid root because that loses the
3887 * effective uid we had before invoking perl, if it was different from the
3890 * Description/comments above do not match current workings:
3891 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3892 * suidperl called with script open and name changed to /dev/fd/N/X;
3893 * suidperl croaks if script is not setuid;
3894 * making perl setuid would be a huge security risk (and yes, that
3895 * would lose any euid we might have had).
3897 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3898 * be defined in suidperl only. suidperl must be setuid root. The
3899 * Configure script will set this up for you if you want it.
3905 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3906 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3907 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3909 const char *linestr;
3913 if (fdscript < 0 || suidscript != 1)
3914 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3916 * Since the script is opened by perl, not suidperl, some of these
3917 * checks are superfluous. Leaving them in probably does not lower
3921 * Do checks even for systems with no HAS_SETREUID.
3922 * We used to swap, then re-swap UIDs with
3923 # ifdef HAS_SETREUID
3924 if (setreuid(PL_euid,PL_uid) < 0
3925 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3926 Perl_croak(aTHX_ "Can't swap uid and euid");
3928 # ifdef HAS_SETREUID
3929 if (setreuid(PL_uid,PL_euid) < 0
3930 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3931 Perl_croak(aTHX_ "Can't reswap uid and euid");
3935 /* On this access check to make sure the directories are readable,
3936 * there is actually a small window that the user could use to make
3937 * filename point to an accessible directory. So there is a faint
3938 * chance that someone could execute a setuid script down in a
3939 * non-accessible directory. I don't know what to do about that.
3940 * But I don't think it's too important. The manual lies when
3941 * it says access() is useful in setuid programs.
3943 * So, access() is pretty useless... but not harmful... do anyway.
3945 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3946 Perl_croak(aTHX_ "Can't access() script\n");
3949 /* If we can swap euid and uid, then we can determine access rights
3950 * with a simple stat of the file, and then compare device and
3951 * inode to make sure we did stat() on the same file we opened.
3952 * Then we just have to make sure he or she can execute it.
3955 * As the script is opened by perl, not suidperl, we do not need to
3956 * care much about access rights.
3958 * The 'script changed' check is needed, or we can get lied to
3959 * about $0 with e.g.
3960 * suidperl /dev/fd/4//bin/x 4<setuidscript
3961 * Without HAS_SETREUID, is it safe to stat() as root?
3963 * Are there any operating systems that pass /dev/fd/xxx for setuid
3964 * scripts, as suggested/described in perlsec(1)? Surely they do not
3965 * pass the script name as we do, so the "script changed" test would
3966 * fail for them... but we never get here with
3967 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3969 * This is one place where we must "lie" about return status: not
3970 * say if the stat() failed. We are doing this as root, and could
3971 * be tricked into reporting existence or not of files that the
3972 * "plain" user cannot even see.
3976 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3977 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3978 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3979 Perl_croak(aTHX_ "Setuid script changed\n");
3983 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3984 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3987 * We used to do this check as the "plain" user (after swapping
3988 * UIDs). But the check for nosuid and noexec filesystem is needed,
3989 * and should be done even without HAS_SETREUID. (Maybe those
3990 * operating systems do not have such mount options anyway...)
3991 * Seems safe enough to do as root.
3993 # if !defined(NO_NOSUID_CHECK)
3994 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3995 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3998 # endif /* IAMSUID */
4000 if (!S_ISREG(PL_statbuf.st_mode)) {
4001 Perl_croak(aTHX_ "Setuid script not plain file\n");
4003 if (PL_statbuf.st_mode & S_IWOTH)
4004 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4005 PL_doswitches = FALSE; /* -s is insecure in suid */
4006 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4007 CopLINE_inc(PL_curcop);
4008 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4009 Perl_croak(aTHX_ "No #! line");
4010 linestr = SvPV_nolen_const(linestr_sv);
4011 /* required even on Sys V */
4012 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4013 Perl_croak(aTHX_ "No #! line");
4017 /* Sanity check on line length */
4018 s_end = s + strlen(s);
4019 if (s_end == s || (s_end - s) > 4000)
4020 Perl_croak(aTHX_ "Very long #! line");
4021 /* Allow more than a single space after #! */
4022 while (isSPACE(*s)) s++;
4023 /* Sanity check on buffer end */
4024 while ((*s) && !isSPACE(*s)) s++;
4025 for (s2 = s; (s2 > linestr &&
4026 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4027 || s2[-1] == '-')); s2--) ;
4028 /* Sanity check on buffer start */
4029 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4030 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4031 Perl_croak(aTHX_ "Not a perl script");
4032 while (*s == ' ' || *s == '\t') s++;
4034 * #! arg must be what we saw above. They can invoke it by
4035 * mentioning suidperl explicitly, but they may not add any strange
4036 * arguments beyond what #! says if they do invoke suidperl that way.
4039 * The way validarg was set up, we rely on the kernel to start
4040 * scripts with argv[1] set to contain all #! line switches (the
4044 * Check that we got all the arguments listed in the #! line (not
4045 * just that there are no extraneous arguments). Might not matter
4046 * much, as switches from #! line seem to be acted upon (also), and
4047 * so may be checked and trapped in perl. But, security checks must
4048 * be done in suidperl and not deferred to perl. Note that suidperl
4049 * does not get around to parsing (and checking) the switches on
4050 * the #! line (but execs perl sooner).
4051 * Allow (require) a trailing newline (which may be of two
4052 * characters on some architectures?) (but no other trailing
4055 len = strlen(validarg);
4056 if (strEQ(validarg," PHOOEY ") ||
4057 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4058 !((s_end - s) == len+1
4059 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4060 Perl_croak(aTHX_ "Args must match #! line");
4064 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4065 PL_euid == PL_statbuf.st_uid)
4067 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4068 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4069 # endif /* IAMSUID */
4072 PL_euid) { /* oops, we're not the setuid root perl */
4074 * When root runs a setuid script, we do not go through the same
4075 * steps of execing sperl and then perl with fd scripts, but
4076 * simply set up UIDs within the same perl invocation; so do
4077 * not have the same checks (on options, whatever) that we have
4078 * for plain users. No problem really: would have to be a script
4079 * that does not actually work for plain users; and if root is
4080 * foolish and can be persuaded to run such an unsafe script, he
4081 * might run also non-setuid ones, and deserves what he gets.
4083 * Or, we might drop the PL_euid check above (and rely just on
4084 * fdscript to avoid loops), and do the execs
4090 * Pass fd script to suidperl.
4091 * Exec suidperl, substituting fd script for scriptname.
4092 * Pass script name as "subdir" of fd, which perl will grok;
4093 * in fact will use that to distinguish this from "normal"
4094 * usage, see comments above.
4096 PerlIO_rewind(rsfp);
4097 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4098 /* PSz 27 Feb 04 Sanity checks on scriptname */
4099 if ((!scriptname) || (!*scriptname) ) {
4100 Perl_croak(aTHX_ "No setuid script name\n");
4102 if (*scriptname == '-') {
4103 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4104 /* Or we might confuse it with an option when replacing
4105 * name in argument list, below (though we do pointer, not
4106 * string, comparisons).
4109 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4110 if (!PL_origargv[which]) {
4111 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4113 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4114 PerlIO_fileno(rsfp), PL_origargv[which]));
4115 # if defined(HAS_FCNTL) && defined(F_SETFD)
4116 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4119 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4120 (int)PERL_REVISION, (int)PERL_VERSION,
4121 (int)PERL_SUBVERSION), PL_origargv);
4123 # endif /* IAMSUID */
4124 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4127 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4129 * This seems back to front: we try HAS_SETEGID first; if not available
4130 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4131 * in the sense that we only want to set EGID; but are there any machines
4132 * with either of the latter, but not the former? Same with UID, later.
4135 (void)setegid(PL_statbuf.st_gid);
4137 # ifdef HAS_SETREGID
4138 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4140 # ifdef HAS_SETRESGID
4141 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4143 PerlProc_setgid(PL_statbuf.st_gid);
4147 if (PerlProc_getegid() != PL_statbuf.st_gid)
4148 Perl_croak(aTHX_ "Can't do setegid!\n");
4150 if (PL_statbuf.st_mode & S_ISUID) {
4151 if (PL_statbuf.st_uid != PL_euid)
4153 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4155 # ifdef HAS_SETREUID
4156 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4158 # ifdef HAS_SETRESUID
4159 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4161 PerlProc_setuid(PL_statbuf.st_uid);
4165 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4166 Perl_croak(aTHX_ "Can't do seteuid!\n");
4168 else if (PL_uid) { /* oops, mustn't run as root */
4170 (void)seteuid((Uid_t)PL_uid);
4172 # ifdef HAS_SETREUID
4173 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4175 # ifdef HAS_SETRESUID
4176 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4178 PerlProc_setuid((Uid_t)PL_uid);
4182 if (PerlProc_geteuid() != PL_uid)
4183 Perl_croak(aTHX_ "Can't do seteuid!\n");
4186 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4187 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4190 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4191 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4192 else if (fdscript < 0 || suidscript != 1)
4193 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4194 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4196 /* PSz 16 Sep 03 Keep neat error message */
4197 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4200 /* We absolutely must clear out any saved ids here, so we */
4201 /* exec the real perl, substituting fd script for scriptname. */
4202 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4204 * It might be thought that using setresgid and/or setresuid (changed to
4205 * set the saved IDs) above might obviate the need to exec, and we could
4206 * go on to "do the perl thing".
4208 * Is there such a thing as "saved GID", and is that set for setuid (but
4209 * not setgid) execution like suidperl? Without exec, it would not be
4210 * cleared for setuid (but not setgid) scripts (or might need a dummy
4213 * We need suidperl to do the exact same argument checking that perl
4214 * does. Thus it cannot be very small; while it could be significantly
4215 * smaller, it is safer (simpler?) to make it essentially the same
4216 * binary as perl (but they are not identical). - Maybe could defer that
4217 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4218 * but prefer to do thorough checks in suidperl itself. Such deferral
4219 * would make suidperl security rely on perl, a design no-no.
4221 * Setuid things should be short and simple, thus easy to understand and
4222 * verify. They should do their "own thing", without influence by
4223 * attackers. It may help if their internal execution flow is fixed,
4224 * regardless of platform: it may be best to exec anyway.
4226 * Suidperl should at least be conceptually simple: a wrapper only,
4227 * never to do any real perl. Maybe we should put
4229 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4231 * into the perly bits.
4233 PerlIO_rewind(rsfp);
4234 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4236 * Keep original arguments: suidperl already has fd script.
4238 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4239 /* if (!PL_origargv[which]) { */
4240 /* errno = EPERM; */
4241 /* Perl_croak(aTHX_ "Permission denied\n"); */
4243 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4244 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4245 # if defined(HAS_FCNTL) && defined(F_SETFD)
4246 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4249 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4250 (int)PERL_REVISION, (int)PERL_VERSION,
4251 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4253 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4254 # endif /* IAMSUID */
4256 PERL_UNUSED_ARG(fdscript);
4257 PERL_UNUSED_ARG(suidscript);
4258 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4259 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4260 PERL_UNUSED_ARG(rsfp);
4262 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4263 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4265 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4268 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4269 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4270 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4271 /* not set-id, must be wrapped */
4274 PERL_UNUSED_ARG(validarg);
4275 PERL_UNUSED_ARG(scriptname);
4276 PERL_UNUSED_ARG(linestr_sv);
4280 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4284 register const char *s2;
4285 #ifdef MACOS_TRADITIONAL
4289 /* skip forward in input to the real script? */
4291 #ifdef MACOS_TRADITIONAL
4292 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4294 while (PL_doextract || gMacPerl_AlwaysExtract) {
4295 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4296 if (!gMacPerl_AlwaysExtract)
4297 Perl_croak(aTHX_ "No Perl script found in input\n");
4299 if (PL_doextract) /* require explicit override ? */
4300 if (!OverrideExtract(PL_origfilename))
4301 Perl_croak(aTHX_ "User aborted script\n");
4303 PL_doextract = FALSE;
4305 /* Pater peccavi, file does not have #! */
4306 PerlIO_rewind(rsfp);
4311 while (PL_doextract) {
4312 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4313 Perl_croak(aTHX_ "No Perl script found in input\n");
4316 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4317 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4318 PL_doextract = FALSE;
4319 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4321 while (*s == ' ' || *s == '\t') s++;
4323 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4324 || s2[-1] == '_') s2--;
4325 if (strnEQ(s2-4,"perl",4))
4326 while ((s = moreswitches(s)))
4329 #ifdef MACOS_TRADITIONAL
4330 /* We are always searching for the #!perl line in MacPerl,
4331 * so if we find it, still keep the line count correct
4332 * by counting lines we already skipped over
4334 for (; maclines > 0 ; maclines--)
4335 PerlIO_ungetc(rsfp, '\n');
4339 /* gMacPerl_AlwaysExtract is false in MPW tool */
4340 } else if (gMacPerl_AlwaysExtract) {
4352 PL_uid = PerlProc_getuid();
4353 PL_euid = PerlProc_geteuid();
4354 PL_gid = PerlProc_getgid();
4355 PL_egid = PerlProc_getegid();
4357 PL_uid |= PL_gid << 16;
4358 PL_euid |= PL_egid << 16;
4360 /* Should not happen: */
4361 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4362 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4365 * Should go by suidscript, not uid!=euid: why disallow
4366 * system("ls") in scripts run from setuid things?
4367 * Or, is this run before we check arguments and set suidscript?
4368 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4369 * (We never have suidscript, can we be sure to have fdscript?)
4370 * Or must then go by UID checks? See comments in forbid_setid also.
4374 /* This is used very early in the lifetime of the program,
4375 * before even the options are parsed, so PL_tainting has
4376 * not been initialized properly. */
4378 Perl_doing_taint(int argc, char *argv[], char *envp[])
4380 #ifndef PERL_IMPLICIT_SYS
4381 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4382 * before we have an interpreter-- and the whole point of this
4383 * function is to be called at such an early stage. If you are on
4384 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4385 * "tainted because running with altered effective ids', you'll
4386 * have to add your own checks somewhere in here. The two most
4387 * known samples of 'implicitness' are Win32 and NetWare, neither
4388 * of which has much of concept of 'uids'. */
4389 int uid = PerlProc_getuid();
4390 int euid = PerlProc_geteuid();
4391 int gid = PerlProc_getgid();
4392 int egid = PerlProc_getegid();
4399 if (uid && (euid != uid || egid != gid))
4401 #endif /* !PERL_IMPLICIT_SYS */
4402 /* This is a really primitive check; environment gets ignored only
4403 * if -T are the first chars together; otherwise one gets
4404 * "Too late" message. */
4405 if ( argc > 1 && argv[1][0] == '-'
4406 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4411 /* Passing the flag as a single char rather than a string is a slight space
4412 optimisation. The only message that isn't /^-.$/ is
4413 "program input from stdin", which is substituted in place of '\0', which
4414 could never be a command line flag. */
4416 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4419 char string[3] = "-x";
4420 const char *message = "program input from stdin";
4427 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4428 if (PL_euid != PL_uid)
4429 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4430 if (PL_egid != PL_gid)
4431 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4432 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4434 * Checks for UID/GID above "wrong": why disallow
4435 * perl -e 'print "Hello\n"'
4436 * from within setuid things?? Simply drop them: replaced by
4437 * fdscript/suidscript and #ifdef IAMSUID checks below.
4439 * This may be too late for command-line switches. Will catch those on
4440 * the #! line, after finding the script name and setting up
4441 * fdscript/suidscript. Note that suidperl does not get around to
4442 * parsing (and checking) the switches on the #! line, but checks that
4443 * the two sets are identical.
4445 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4446 * instead, or would that be "too late"? (We never have suidscript, can
4447 * we be sure to have fdscript?)
4449 * Catch things with suidscript (in descendant of suidperl), even with
4450 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4451 * below; but I am paranoid.
4453 * Also see comments about root running a setuid script, elsewhere.
4455 if (suidscript >= 0)
4456 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4458 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4459 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4460 #endif /* IAMSUID */
4464 Perl_init_debugger(pTHX)
4467 HV * const ostash = PL_curstash;
4469 PL_curstash = PL_debstash;
4470 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4472 AvREAL_off(PL_dbargs);
4473 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4474 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4475 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4476 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4477 sv_setiv(PL_DBsingle, 0);
4478 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4479 sv_setiv(PL_DBtrace, 0);
4480 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4481 sv_setiv(PL_DBsignal, 0);
4482 PL_curstash = ostash;
4485 #ifndef STRESS_REALLOC
4486 #define REASONABLE(size) (size)
4488 #define REASONABLE(size) (1) /* unreasonable */
4492 Perl_init_stacks(pTHX)
4495 /* start with 128-item stack and 8K cxstack */
4496 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4497 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4498 PL_curstackinfo->si_type = PERLSI_MAIN;
4499 PL_curstack = PL_curstackinfo->si_stack;
4500 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4502 PL_stack_base = AvARRAY(PL_curstack);
4503 PL_stack_sp = PL_stack_base;
4504 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4506 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4509 PL_tmps_max = REASONABLE(128);
4511 Newx(PL_markstack,REASONABLE(32),I32);
4512 PL_markstack_ptr = PL_markstack;
4513 PL_markstack_max = PL_markstack + REASONABLE(32);
4517 Newx(PL_scopestack,REASONABLE(32),I32);
4518 PL_scopestack_ix = 0;
4519 PL_scopestack_max = REASONABLE(32);
4521 Newx(PL_savestack,REASONABLE(128),ANY);
4522 PL_savestack_ix = 0;
4523 PL_savestack_max = REASONABLE(128);
4532 while (PL_curstackinfo->si_next)
4533 PL_curstackinfo = PL_curstackinfo->si_next;
4534 while (PL_curstackinfo) {
4535 PERL_SI *p = PL_curstackinfo->si_prev;
4536 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4537 Safefree(PL_curstackinfo->si_cxstack);
4538 Safefree(PL_curstackinfo);
4539 PL_curstackinfo = p;
4541 Safefree(PL_tmps_stack);
4542 Safefree(PL_markstack);
4543 Safefree(PL_scopestack);
4544 Safefree(PL_savestack);
4549 S_init_predump_symbols(pTHX)
4555 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4556 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4557 GvMULTI_on(PL_stdingv);
4558 io = GvIOp(PL_stdingv);
4559 IoTYPE(io) = IoTYPE_RDONLY;
4560 IoIFP(io) = PerlIO_stdin();
4561 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4563 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4565 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4568 IoTYPE(io) = IoTYPE_WRONLY;
4569 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4571 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4573 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4575 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4576 GvMULTI_on(PL_stderrgv);
4577 io = GvIOp(PL_stderrgv);
4578 IoTYPE(io) = IoTYPE_WRONLY;
4579 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4580 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4582 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4584 PL_statname = newSV(0); /* last filename we did stat on */
4586 Safefree(PL_osname);
4587 PL_osname = savepv(OSNAME);
4591 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4594 argc--,argv++; /* skip name of script */
4595 if (PL_doswitches) {
4596 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4600 if (argv[0][1] == '-' && !argv[0][2]) {
4604 if ((s = strchr(argv[0], '='))) {
4605 const char *const start_name = argv[0] + 1;
4606 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4607 TRUE, SVt_PV)), s + 1);
4610 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4613 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4614 GvMULTI_on(PL_argvgv);
4615 (void)gv_AVadd(PL_argvgv);
4616 av_clear(GvAVn(PL_argvgv));
4617 for (; argc > 0; argc--,argv++) {
4618 SV * const sv = newSVpv(argv[0],0);
4619 av_push(GvAVn(PL_argvgv),sv);
4620 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4621 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4624 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4625 (void)sv_utf8_decode(sv);
4631 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4636 PL_toptarget = newSV_type(SVt_PVFM);
4637 sv_setpvn(PL_toptarget, "", 0);
4638 PL_bodytarget = newSV_type(SVt_PVFM);
4639 sv_setpvn(PL_bodytarget, "", 0);
4640 PL_formtarget = PL_bodytarget;
4644 init_argv_symbols(argc,argv);
4646 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4647 #ifdef MACOS_TRADITIONAL
4648 /* $0 is not majick on a Mac */
4649 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4651 sv_setpv(GvSV(tmpgv),PL_origfilename);
4652 magicname("0", "0", 1);
4655 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4657 bool env_is_not_environ;
4658 GvMULTI_on(PL_envgv);
4659 hv = GvHVn(PL_envgv);
4660 hv_magic(hv, NULL, PERL_MAGIC_env);
4662 #ifdef USE_ENVIRON_ARRAY
4663 /* Note that if the supplied env parameter is actually a copy
4664 of the global environ then it may now point to free'd memory
4665 if the environment has been modified since. To avoid this
4666 problem we treat env==NULL as meaning 'use the default'
4670 env_is_not_environ = env != environ;
4671 if (env_is_not_environ
4672 # ifdef USE_ITHREADS
4673 && PL_curinterp == aTHX
4682 for (; *env; env++) {
4683 if (!(s = strchr(*env,'=')) || s == *env)
4685 #if defined(MSDOS) && !defined(DJGPP)
4690 sv = newSVpv(s+1, 0);
4691 (void)hv_store(hv, *env, s - *env, sv, 0);
4692 if (env_is_not_environ)
4696 #endif /* USE_ENVIRON_ARRAY */
4697 #endif /* !PERL_MICRO */
4700 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4701 SvREADONLY_off(GvSV(tmpgv));
4702 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4703 SvREADONLY_on(GvSV(tmpgv));
4705 #ifdef THREADS_HAVE_PIDS
4706 PL_ppid = (IV)getppid();
4709 /* touch @F array to prevent spurious warnings 20020415 MJD */
4711 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4716 S_init_perllib(pTHX)
4722 s = PerlEnv_getenv("PERL5LIB");
4724 * It isn't possible to delete an environment variable with
4725 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4726 * case we treat PERL5LIB as undefined if it has a zero-length value.
4728 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4729 if (s && *s != '\0')
4733 incpush(s, TRUE, TRUE, TRUE, FALSE);
4735 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4737 /* Treat PERL5?LIB as a possible search list logical name -- the
4738 * "natural" VMS idiom for a Unix path string. We allow each
4739 * element to be a set of |-separated directories for compatibility.
4743 if (my_trnlnm("PERL5LIB",buf,0))
4744 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4746 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4750 /* Use the ~-expanded versions of APPLLIB (undocumented),
4751 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4754 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4758 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4760 #ifdef MACOS_TRADITIONAL
4763 SV * privdir = newSV(0);
4764 char * macperl = PerlEnv_getenv("MACPERL");
4769 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4770 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4771 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4772 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4773 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4774 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4776 SvREFCNT_dec(privdir);
4779 incpush(":", FALSE, FALSE, TRUE, FALSE);
4782 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4785 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4787 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4791 /* sitearch is always relative to sitelib on Windows for
4792 * DLL-based path intuition to work correctly */
4793 # if !defined(WIN32)
4794 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4800 /* this picks up sitearch as well */
4801 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4803 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4807 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4808 /* Search for version-specific dirs below here */
4809 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4812 #ifdef PERL_VENDORARCH_EXP
4813 /* vendorarch is always relative to vendorlib on Windows for
4814 * DLL-based path intuition to work correctly */
4815 # if !defined(WIN32)
4816 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4820 #ifdef PERL_VENDORLIB_EXP
4822 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4824 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4828 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4829 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4832 #ifdef PERL_OTHERLIBDIRS
4833 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4837 incpush(".", FALSE, FALSE, TRUE, FALSE);
4838 #endif /* MACOS_TRADITIONAL */
4841 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4842 # define PERLLIB_SEP ';'
4845 # define PERLLIB_SEP '|'
4847 # if defined(MACOS_TRADITIONAL)
4848 # define PERLLIB_SEP ','
4850 # define PERLLIB_SEP ':'
4854 #ifndef PERLLIB_MANGLE
4855 # define PERLLIB_MANGLE(s,n) (s)
4858 /* Push a directory onto @INC if it exists.
4859 Generate a new SV if we do this, to save needing to copy the SV we push
4862 S_incpush_if_exists(pTHX_ SV *dir)
4866 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4867 S_ISDIR(tmpstatbuf.st_mode)) {
4868 av_push(GvAVn(PL_incgv), dir);
4875 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4880 const char *p = dir;
4885 if (addsubdirs || addoldvers) {
4889 /* Break at all separators */
4891 SV *libdir = newSV(0);
4894 /* skip any consecutive separators */
4896 while ( *p == PERLLIB_SEP ) {
4897 /* Uncomment the next line for PATH semantics */
4898 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4903 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4904 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4909 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4910 p = NULL; /* break out */
4912 #ifdef MACOS_TRADITIONAL
4913 if (!strchr(SvPVX(libdir), ':')) {
4916 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4918 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4919 sv_catpvs(libdir, ":");
4922 /* Do the if() outside the #ifdef to avoid warnings about an unused
4925 #ifdef PERL_RELOCATABLE_INC
4927 * Relocatable include entries are marked with a leading .../
4930 * 0: Remove that leading ".../"
4931 * 1: Remove trailing executable name (anything after the last '/')
4932 * from the perl path to give a perl prefix
4934 * While the @INC element starts "../" and the prefix ends with a real
4935 * directory (ie not . or ..) chop that real directory off the prefix
4936 * and the leading "../" from the @INC element. ie a logical "../"
4938 * Finally concatenate the prefix and the remainder of the @INC element
4939 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4940 * generates /usr/local/lib/perl5
4942 const char *libpath = SvPVX(libdir);
4943 STRLEN libpath_len = SvCUR(libdir);
4944 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4946 SV * const caret_X = get_sv("\030", 0);
4947 /* Going to use the SV just as a scratch buffer holding a C
4953 /* $^X is *the* source of taint if tainting is on, hence
4954 SvPOK() won't be true. */
4956 assert(SvPOKp(caret_X));
4957 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4959 /* Firstly take off the leading .../
4960 If all else fail we'll do the paths relative to the current
4962 sv_chop(libdir, libpath + 4);
4963 /* Don't use SvPV as we're intentionally bypassing taining,
4964 mortal copies that the mg_get of tainting creates, and
4965 corruption that seems to come via the save stack.
4966 I guess that the save stack isn't correctly set up yet. */
4967 libpath = SvPVX(libdir);
4968 libpath_len = SvCUR(libdir);
4970 /* This would work more efficiently with memrchr, but as it's
4971 only a GNU extension we'd need to probe for it and
4972 implement our own. Not hard, but maybe not worth it? */
4974 prefix = SvPVX(prefix_sv);
4975 lastslash = strrchr(prefix, '/');
4977 /* First time in with the *lastslash = '\0' we just wipe off
4978 the trailing /perl from (say) /usr/foo/bin/perl
4982 while ((*lastslash = '\0'), /* Do that, come what may. */
4983 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4984 && (lastslash = strrchr(prefix, '/')))) {
4985 if (lastslash[1] == '\0'
4986 || (lastslash[1] == '.'
4987 && (lastslash[2] == '/' /* ends "/." */
4988 || (lastslash[2] == '/'
4989 && lastslash[3] == '/' /* or "/.." */
4991 /* Prefix ends "/" or "/." or "/..", any of which
4992 are fishy, so don't do any more logical cleanup.
4996 /* Remove leading "../" from path */
4999 /* Next iteration round the loop removes the last
5000 directory name from prefix by writing a '\0' in
5001 the while clause. */
5003 /* prefix has been terminated with a '\0' to the correct
5004 length. libpath points somewhere into the libdir SV.
5005 We need to join the 2 with '/' and drop the result into
5007 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5008 SvREFCNT_dec(libdir);
5009 /* And this is the new libdir. */
5012 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5013 /* Need to taint reloccated paths if running set ID */
5014 SvTAINTED_on(libdir);
5017 SvREFCNT_dec(prefix_sv);
5022 * BEFORE pushing libdir onto @INC we may first push version- and
5023 * archname-specific sub-directories.
5025 if (addsubdirs || addoldvers) {
5026 #ifdef PERL_INC_VERSION_LIST
5027 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5028 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5029 const char * const *incver;
5035 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5037 while (unix[len-1] == '/') len--; /* Cosmetic */
5038 sv_usepvn(libdir,unix,len);
5041 PerlIO_printf(Perl_error_log,
5042 "Failed to unixify @INC element \"%s\"\n",
5046 #ifdef MACOS_TRADITIONAL
5047 #define PERL_AV_SUFFIX_FMT ""
5048 #define PERL_ARCH_FMT "%s:"
5049 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5051 #define PERL_AV_SUFFIX_FMT "/"
5052 #define PERL_ARCH_FMT "/%s"
5053 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5055 /* .../version/archname if -d .../version/archname */
5056 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5058 (int)PERL_REVISION, (int)PERL_VERSION,
5059 (int)PERL_SUBVERSION, ARCHNAME);
5060 subdir = S_incpush_if_exists(aTHX_ subdir);
5062 /* .../version if -d .../version */
5063 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5065 (int)PERL_REVISION, (int)PERL_VERSION,
5066 (int)PERL_SUBVERSION);
5067 subdir = S_incpush_if_exists(aTHX_ subdir);
5069 /* .../archname if -d .../archname */
5070 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5071 SVfARG(libdir), ARCHNAME);
5072 subdir = S_incpush_if_exists(aTHX_ subdir);
5076 #ifdef PERL_INC_VERSION_LIST
5078 for (incver = incverlist; *incver; incver++) {
5079 /* .../xxx if -d .../xxx */
5080 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5081 SVfARG(libdir), *incver);
5082 subdir = S_incpush_if_exists(aTHX_ subdir);
5088 /* finally push this lib directory on the end of @INC */
5089 av_push(GvAVn(PL_incgv), libdir);
5092 assert (SvREFCNT(subdir) == 1);
5093 SvREFCNT_dec(subdir);
5099 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5103 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5109 while (av_len(paramList) >= 0) {
5110 cv = (CV*)av_shift(paramList);
5112 if (paramList == PL_beginav) {
5113 /* save PL_beginav for compiler */
5114 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5116 else if (paramList == PL_checkav) {
5117 /* save PL_checkav for compiler */
5118 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5120 else if (paramList == PL_unitcheckav) {
5121 /* save PL_unitcheckav for compiler */
5122 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5133 PL_madskills |= 16384;
5138 PL_madskills &= ~16384;
5141 (void)SvPV_const(atsv, len);
5143 PL_curcop = &PL_compiling;
5144 CopLINE_set(PL_curcop, oldline);
5145 if (paramList == PL_beginav)
5146 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5148 Perl_sv_catpvf(aTHX_ atsv,
5149 "%s failed--call queue aborted",
5150 paramList == PL_checkav ? "CHECK"
5151 : paramList == PL_initav ? "INIT"
5152 : paramList == PL_unitcheckav ? "UNITCHECK"
5154 while (PL_scopestack_ix > oldscope)
5157 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5164 /* my_exit() was called */
5165 while (PL_scopestack_ix > oldscope)
5168 PL_curstash = PL_defstash;
5169 PL_curcop = &PL_compiling;
5170 CopLINE_set(PL_curcop, oldline);
5172 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5173 if (paramList == PL_beginav)
5174 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5176 Perl_croak(aTHX_ "%s failed--call queue aborted",
5177 paramList == PL_checkav ? "CHECK"
5178 : paramList == PL_initav ? "INIT"
5179 : paramList == PL_unitcheckav ? "UNITCHECK"
5186 PL_curcop = &PL_compiling;
5187 CopLINE_set(PL_curcop, oldline);
5190 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5199 Perl_my_exit(pTHX_ U32 status)
5202 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5203 (void*)thr, (unsigned long) status));
5212 STATUS_EXIT_SET(status);
5219 Perl_my_failure_exit(pTHX)
5223 /* We have been called to fall on our sword. The desired exit code
5224 * should be already set in STATUS_UNIX, but could be shifted over
5225 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5228 * If an error code has not been set, then force the issue.
5230 if (MY_POSIX_EXIT) {
5232 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5233 * the exit code when there isn't an error.
5236 if (STATUS_UNIX == 0)
5237 STATUS_UNIX_EXIT_SET(255);
5239 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5241 /* The exit code could have been set by $? or vmsish which
5242 * means that it may not be fatal. So convert
5243 * success/warning codes to fatal.
5245 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5246 STATUS_UNIX_EXIT_SET(255);
5250 /* Traditionally Perl on VMS always expects a Fatal Error. */
5251 if (vaxc$errno & 1) {
5253 /* So force success status to failure */
5254 if (STATUS_NATIVE & 1)
5259 STATUS_UNIX = EINTR; /* In case something cares */
5264 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5266 /* Encode the severity code */
5267 severity = STATUS_NATIVE & STS$M_SEVERITY;
5268 STATUS_UNIX = (severity ? severity : 1) << 8;
5270 /* Perl expects this to be a fatal error */
5271 if (severity != STS$K_SEVERE)
5280 STATUS_UNIX_SET(errno);
5282 exitstatus = STATUS_UNIX >> 8;
5283 if (exitstatus & 255)
5284 STATUS_UNIX_SET(exitstatus);
5286 STATUS_UNIX_SET(255);
5293 S_my_exit_jump(pTHX)
5298 SvREFCNT_dec(PL_e_script);
5302 POPSTACK_TO(PL_mainstack);
5310 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5313 const char * const p = SvPVX_const(PL_e_script);
5314 const char *nl = strchr(p, '\n');
5316 PERL_UNUSED_ARG(idx);
5317 PERL_UNUSED_ARG(maxlen);
5319 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5321 filter_del(read_e_script);
5324 sv_catpvn(buf_sv, p, nl-p);
5325 sv_chop(PL_e_script, nl);
5331 * c-indentation-style: bsd
5333 * indent-tabs-mode: t
5336 * ex: set ts=8 sts=4 sw=4 noet: