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);
184 #ifdef PERL_IMPLICIT_SYS
186 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
187 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
188 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
189 struct IPerlDir* ipD, struct IPerlSock* ipS,
190 struct IPerlProc* ipP)
192 PerlInterpreter *my_perl;
193 /* Newx() needs interpreter, so call malloc() instead */
194 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 Zero(my_perl, 1, PerlInterpreter);
206 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
213 =head1 Embedding Functions
215 =for apidoc perl_alloc
217 Allocates a new Perl interpreter. See L<perlembed>.
225 PerlInterpreter *my_perl;
227 /* Newx() needs interpreter, so call malloc() instead */
228 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
230 S_init_tls_and_interp(my_perl);
231 #ifndef PERL_TRACK_MEMPOOL
232 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
234 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
239 #endif /* PERL_IMPLICIT_SYS */
242 =for apidoc perl_construct
244 Initializes a new Perl interpreter. See L<perlembed>.
250 perl_construct(pTHXx)
253 PERL_UNUSED_ARG(my_perl);
256 PL_perl_destruct_level = 1;
258 if (PL_perl_destruct_level > 0)
261 /* Init the real globals (and main thread)? */
263 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
265 PL_linestr = newSV_type(SVt_PVIV);
266 SvGROW(PL_linestr, 80);
268 if (!SvREADONLY(&PL_sv_undef)) {
269 /* set read-only and try to insure than we wont see REFCNT==0
272 SvREADONLY_on(&PL_sv_undef);
273 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
275 sv_setpv(&PL_sv_no,PL_No);
276 /* value lookup in void context - happens to have the side effect
277 of caching the numeric forms. */
280 SvREADONLY_on(&PL_sv_no);
281 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
283 sv_setpv(&PL_sv_yes,PL_Yes);
286 SvREADONLY_on(&PL_sv_yes);
287 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
289 SvREADONLY_on(&PL_sv_placeholder);
290 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
293 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
294 #ifdef PERL_USES_PL_PIDSTATUS
295 PL_pidstatus = newHV();
299 PL_rs = newSVpvs("\n");
304 PL_lex_state = LEX_NOTPARSING;
310 SET_NUMERIC_STANDARD();
312 #if defined(LOCAL_PATCH_COUNT)
313 PL_localpatches = local_patches; /* For possible -v */
316 #ifdef HAVE_INTERP_INTERN
320 PerlIO_init(aTHX); /* Hook to IO system */
322 PL_fdpid = newAV(); /* for remembering popen pids by fd */
323 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
324 PL_errors = newSVpvs("");
325 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
326 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
327 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
329 /* First entry is an array of empty elements */
330 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
331 PL_regex_pad = AvARRAY(PL_regex_padav);
333 #ifdef USE_REENTRANT_API
334 Perl_reentrant_init(aTHX);
337 /* Note that strtab is a rather special HV. Assumptions are made
338 about not iterating on it, and not adding tie magic to it.
339 It is properly deallocated in perl_destruct() */
342 HvSHAREKEYS_off(PL_strtab); /* mandatory */
343 hv_ksplit(PL_strtab, 512);
345 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
346 _dyld_lookup_and_bind
347 ("__environ", (unsigned long *) &environ_pointer, NULL);
351 # ifdef USE_ENVIRON_ARRAY
352 PL_origenviron = environ;
356 /* Use sysconf(_SC_CLK_TCK) if available, if not
357 * available or if the sysconf() fails, use the HZ.
358 * BeOS has those, but returns the wrong value.
359 * The HZ if not originally defined has been by now
360 * been defined as CLK_TCK, if available. */
361 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
362 PL_clocktick = sysconf(_SC_CLK_TCK);
363 if (PL_clocktick <= 0)
367 PL_stashcache = newHV();
369 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
370 (int)PERL_VERSION, (int)PERL_SUBVERSION);
373 if (!PL_mmap_page_size) {
374 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
376 SETERRNO(0, SS_NORMAL);
378 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
380 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
382 if ((long) PL_mmap_page_size < 0) {
384 SV * const error = ERRSV;
385 SvUPGRADE(error, SVt_PV);
386 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
389 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
393 # ifdef HAS_GETPAGESIZE
394 PL_mmap_page_size = getpagesize();
396 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
397 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
401 if (PL_mmap_page_size <= 0)
402 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
403 (IV) PL_mmap_page_size);
405 #endif /* HAS_MMAP */
407 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
408 PL_timesbase.tms_utime = 0;
409 PL_timesbase.tms_stime = 0;
410 PL_timesbase.tms_cutime = 0;
411 PL_timesbase.tms_cstime = 0;
418 =for apidoc nothreadhook
420 Stub that provides thread hook for perl_destruct when there are
427 Perl_nothreadhook(pTHX)
433 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
435 Perl_dump_sv_child(pTHX_ SV *sv)
438 const int sock = PL_dumper_fd;
439 const int debug_fd = PerlIO_fileno(Perl_debug_log);
440 union control_un control;
443 struct cmsghdr *cmptr;
445 unsigned char buffer[256];
447 if(sock == -1 || debug_fd == -1)
450 PerlIO_flush(Perl_debug_log);
452 /* All these shenanigans are to pass a file descriptor over to our child for
453 it to dump out to. We can't let it hold open the file descriptor when it
454 forks, as the file descriptor it will dump to can turn out to be one end
455 of pipe that some other process will wait on for EOF. (So as it would
456 be open, the wait would be forever.) */
458 msg.msg_control = control.control;
459 msg.msg_controllen = sizeof(control.control);
460 /* We're a connected socket so we don't need a destination */
466 cmptr = CMSG_FIRSTHDR(&msg);
467 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
468 cmptr->cmsg_level = SOL_SOCKET;
469 cmptr->cmsg_type = SCM_RIGHTS;
470 *((int *)CMSG_DATA(cmptr)) = 1;
472 vec[0].iov_base = (void*)&sv;
473 vec[0].iov_len = sizeof(sv);
474 got = sendmsg(sock, &msg, 0);
477 perror("Debug leaking scalars parent sendmsg failed");
480 if(got < sizeof(sv)) {
481 perror("Debug leaking scalars parent short sendmsg");
485 /* Return protocol is
487 unsigned char: length of location string (0 for empty)
488 unsigned char*: string (not terminated)
490 vec[0].iov_base = (void*)&returned_errno;
491 vec[0].iov_len = sizeof(returned_errno);
492 vec[1].iov_base = buffer;
495 got = readv(sock, vec, 2);
498 perror("Debug leaking scalars parent read failed");
499 PerlIO_flush(PerlIO_stderr());
502 if(got < sizeof(returned_errno) + 1) {
503 perror("Debug leaking scalars parent short read");
504 PerlIO_flush(PerlIO_stderr());
509 got = read(sock, buffer + 1, *buffer);
511 perror("Debug leaking scalars parent read 2 failed");
512 PerlIO_flush(PerlIO_stderr());
517 perror("Debug leaking scalars parent short read 2");
518 PerlIO_flush(PerlIO_stderr());
523 if (returned_errno || *buffer) {
524 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
525 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
526 returned_errno, strerror(returned_errno));
532 =for apidoc perl_destruct
534 Shuts down a Perl interpreter. See L<perlembed>.
543 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
545 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
549 PERL_UNUSED_ARG(my_perl);
551 /* wait for all pseudo-forked children to finish */
552 PERL_WAIT_FOR_CHILDREN;
554 destruct_level = PL_perl_destruct_level;
557 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
559 const int i = atoi(s);
560 if (destruct_level < i)
566 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
572 if (PL_endav && !PL_minus_c)
573 call_list(PL_scopestack_ix, PL_endav);
579 /* Need to flush since END blocks can produce output */
582 if (CALL_FPTR(PL_threadhook)(aTHX)) {
583 /* Threads hook has vetoed further cleanup */
584 PL_veto_cleanup = TRUE;
588 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
589 if (destruct_level != 0) {
590 /* Fork here to create a child. Our child's job is to preserve the
591 state of scalars prior to destruction, so that we can instruct it
592 to dump any scalars that we later find have leaked.
593 There's no subtlety in this code - it assumes POSIX, and it doesn't
597 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
598 perror("Debug leaking scalars socketpair failed");
604 perror("Debug leaking scalars fork failed");
608 /* We are the child */
609 const int sock = fd[1];
610 const int debug_fd = PerlIO_fileno(Perl_debug_log);
613 /* Our success message is an integer 0, and a char 0 */
614 static const char success[sizeof(int) + 1];
618 /* We need to close all other file descriptors otherwise we end up
619 with interesting hangs, where the parent closes its end of a
620 pipe, and sits waiting for (another) child to terminate. Only
621 that child never terminates, because it never gets EOF, because
622 we also have the far end of the pipe open. We even need to
623 close the debugging fd, because sometimes it happens to be one
624 end of a pipe, and a process is waiting on the other end for
625 EOF. Normally it would be closed at some point earlier in
626 destruction, but if we happen to cause the pipe to remain open,
627 EOF never occurs, and we get an infinite hang. Hence all the
628 games to pass in a file descriptor if it's actually needed. */
630 f = sysconf(_SC_OPEN_MAX);
632 where = "sysconf failed";
643 union control_un control;
646 struct cmsghdr *cmptr;
650 msg.msg_control = control.control;
651 msg.msg_controllen = sizeof(control.control);
652 /* We're a connected socket so we don't need a source */
656 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
658 vec[0].iov_base = (void*)⌖
659 vec[0].iov_len = sizeof(target);
661 got = recvmsg(sock, &msg, 0);
666 where = "recv failed";
669 if(got < sizeof(target)) {
670 where = "short recv";
674 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
678 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
679 where = "wrong cmsg_len";
682 if(cmptr->cmsg_level != SOL_SOCKET) {
683 where = "wrong cmsg_level";
686 if(cmptr->cmsg_type != SCM_RIGHTS) {
687 where = "wrong cmsg_type";
691 got_fd = *(int*)CMSG_DATA(cmptr);
692 /* For our last little bit of trickery, put the file descriptor
693 back into Perl_debug_log, as if we never actually closed it
695 if(got_fd != debug_fd) {
696 if (dup2(got_fd, debug_fd) == -1) {
703 PerlIO_flush(Perl_debug_log);
705 got = write(sock, &success, sizeof(success));
708 where = "write failed";
711 if(got < sizeof(success)) {
712 where = "short write";
719 int send_errno = errno;
720 unsigned char length = (unsigned char) strlen(where);
721 struct iovec failure[3] = {
722 {(void*)&send_errno, sizeof(send_errno)},
724 {(void*)where, length}
726 int got = writev(sock, failure, 3);
727 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
728 in the parent if we try to read from the socketpair after the
729 child has exited, even if there was data to read.
730 So sleep a bit to give the parent a fighting chance of
733 _exit((got == -1) ? errno : 0);
737 PL_dumper_fd = fd[0];
742 /* We must account for everything. */
744 /* Destroy the main CV and syntax tree */
745 /* Do this now, because destroying ops can cause new SVs to be generated
746 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
747 PL_curcop to point to a valid op from which the filename structure
749 PL_curcop = &PL_compiling;
751 /* ensure comppad/curpad to refer to main's pad */
752 if (CvPADLIST(PL_main_cv)) {
753 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
755 op_free(PL_main_root);
758 PL_main_start = NULL;
759 SvREFCNT_dec(PL_main_cv);
763 /* Tell PerlIO we are about to tear things apart in case
764 we have layers which are using resources that should
768 PerlIO_destruct(aTHX);
770 if (PL_sv_objcount) {
772 * Try to destruct global references. We do this first so that the
773 * destructors and destructees still exist. Some sv's might remain.
774 * Non-referenced objects are on their own.
778 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
779 PL_defoutgv = NULL; /* may have been freed */
782 /* unhook hooks which will soon be, or use, destroyed data */
783 SvREFCNT_dec(PL_warnhook);
785 SvREFCNT_dec(PL_diehook);
788 /* call exit list functions */
789 while (PL_exitlistlen-- > 0)
790 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
792 Safefree(PL_exitlist);
797 /* jettison our possibly duplicated environment */
798 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
799 * so we certainly shouldn't free it here
802 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
803 if (environ != PL_origenviron && !PL_use_safe_putenv
805 /* only main thread can free environ[0] contents */
806 && PL_curinterp == aTHX
812 for (i = 0; environ[i]; i++)
813 safesysfree(environ[i]);
815 /* Must use safesysfree() when working with environ. */
816 safesysfree(environ);
818 environ = PL_origenviron;
821 #endif /* !PERL_MICRO */
823 if (destruct_level == 0) {
825 DEBUG_P(debprofdump());
827 #if defined(PERLIO_LAYERS)
828 /* No more IO - including error messages ! */
829 PerlIO_cleanup(aTHX);
832 CopFILE_free(&PL_compiling);
833 CopSTASH_free(&PL_compiling);
835 /* The exit() function will do everything that needs doing. */
839 /* reset so print() ends up where we expect */
843 /* the syntax tree is shared between clones
844 * so op_free(PL_main_root) only ReREFCNT_dec's
845 * REGEXPs in the parent interpreter
846 * we need to manually ReREFCNT_dec for the clones
849 I32 i = AvFILLp(PL_regex_padav) + 1;
850 SV * const * const ary = AvARRAY(PL_regex_padav);
853 SV * const resv = ary[--i];
855 if (SvFLAGS(resv) & SVf_BREAK) {
856 /* this is PL_reg_curpm, already freed
857 * flag is set in regexec.c:S_regtry
859 SvFLAGS(resv) &= ~SVf_BREAK;
861 else if(SvREPADTMP(resv)) {
862 SvREPADTMP_off(resv);
864 else if(SvIOKp(resv)) {
865 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
870 SvREFCNT_dec(PL_regex_padav);
871 PL_regex_padav = NULL;
875 SvREFCNT_dec((SV*) PL_stashcache);
876 PL_stashcache = NULL;
878 /* loosen bonds of global variables */
881 (void)PerlIO_close(PL_rsfp);
885 /* Filters for program text */
886 SvREFCNT_dec(PL_rsfp_filters);
887 PL_rsfp_filters = NULL;
890 Safefree(PL_splitstr);
895 PL_preprocess = FALSE;
901 PL_doswitches = FALSE;
902 PL_dowarn = G_WARN_OFF;
903 PL_doextract = FALSE;
904 PL_sawampersand = FALSE; /* must save all match strings */
907 Safefree(PL_inplace);
909 SvREFCNT_dec(PL_patchlevel);
912 SvREFCNT_dec(PL_e_script);
918 /* magical thingies */
920 SvREFCNT_dec(PL_ofs_sv); /* $, */
923 SvREFCNT_dec(PL_ors_sv); /* $\ */
926 SvREFCNT_dec(PL_rs); /* $/ */
929 Safefree(PL_osname); /* $^O */
932 SvREFCNT_dec(PL_statname);
936 /* defgv, aka *_ should be taken care of elsewhere */
938 /* clean up after study() */
939 SvREFCNT_dec(PL_lastscream);
940 PL_lastscream = NULL;
941 Safefree(PL_screamfirst);
943 Safefree(PL_screamnext);
947 Safefree(PL_efloatbuf);
951 /* startup and shutdown function lists */
952 SvREFCNT_dec(PL_beginav);
953 SvREFCNT_dec(PL_beginav_save);
954 SvREFCNT_dec(PL_endav);
955 SvREFCNT_dec(PL_checkav);
956 SvREFCNT_dec(PL_checkav_save);
957 SvREFCNT_dec(PL_unitcheckav);
958 SvREFCNT_dec(PL_unitcheckav_save);
959 SvREFCNT_dec(PL_initav);
961 PL_beginav_save = NULL;
964 PL_checkav_save = NULL;
965 PL_unitcheckav = NULL;
966 PL_unitcheckav_save = NULL;
969 /* shortcuts just get cleared */
978 PL_last_in_gv = NULL;
986 PL_DBassertion = NULL;
991 SvREFCNT_dec(PL_argvout_stack);
992 PL_argvout_stack = NULL;
994 SvREFCNT_dec(PL_modglobal);
996 SvREFCNT_dec(PL_preambleav);
997 PL_preambleav = NULL;
998 SvREFCNT_dec(PL_subname);
1000 SvREFCNT_dec(PL_linestr);
1002 #ifdef PERL_USES_PL_PIDSTATUS
1003 SvREFCNT_dec(PL_pidstatus);
1004 PL_pidstatus = NULL;
1006 SvREFCNT_dec(PL_toptarget);
1007 PL_toptarget = NULL;
1008 SvREFCNT_dec(PL_bodytarget);
1009 PL_bodytarget = NULL;
1010 PL_formtarget = NULL;
1012 /* free locale stuff */
1013 #ifdef USE_LOCALE_COLLATE
1014 Safefree(PL_collation_name);
1015 PL_collation_name = NULL;
1018 #ifdef USE_LOCALE_NUMERIC
1019 Safefree(PL_numeric_name);
1020 PL_numeric_name = NULL;
1021 SvREFCNT_dec(PL_numeric_radix_sv);
1022 PL_numeric_radix_sv = NULL;
1025 /* clear utf8 character classes */
1026 SvREFCNT_dec(PL_utf8_alnum);
1027 SvREFCNT_dec(PL_utf8_alnumc);
1028 SvREFCNT_dec(PL_utf8_ascii);
1029 SvREFCNT_dec(PL_utf8_alpha);
1030 SvREFCNT_dec(PL_utf8_space);
1031 SvREFCNT_dec(PL_utf8_cntrl);
1032 SvREFCNT_dec(PL_utf8_graph);
1033 SvREFCNT_dec(PL_utf8_digit);
1034 SvREFCNT_dec(PL_utf8_upper);
1035 SvREFCNT_dec(PL_utf8_lower);
1036 SvREFCNT_dec(PL_utf8_print);
1037 SvREFCNT_dec(PL_utf8_punct);
1038 SvREFCNT_dec(PL_utf8_xdigit);
1039 SvREFCNT_dec(PL_utf8_mark);
1040 SvREFCNT_dec(PL_utf8_toupper);
1041 SvREFCNT_dec(PL_utf8_totitle);
1042 SvREFCNT_dec(PL_utf8_tolower);
1043 SvREFCNT_dec(PL_utf8_tofold);
1044 SvREFCNT_dec(PL_utf8_idstart);
1045 SvREFCNT_dec(PL_utf8_idcont);
1046 PL_utf8_alnum = NULL;
1047 PL_utf8_alnumc = NULL;
1048 PL_utf8_ascii = NULL;
1049 PL_utf8_alpha = NULL;
1050 PL_utf8_space = NULL;
1051 PL_utf8_cntrl = NULL;
1052 PL_utf8_graph = NULL;
1053 PL_utf8_digit = NULL;
1054 PL_utf8_upper = NULL;
1055 PL_utf8_lower = NULL;
1056 PL_utf8_print = NULL;
1057 PL_utf8_punct = NULL;
1058 PL_utf8_xdigit = NULL;
1059 PL_utf8_mark = NULL;
1060 PL_utf8_toupper = NULL;
1061 PL_utf8_totitle = NULL;
1062 PL_utf8_tolower = NULL;
1063 PL_utf8_tofold = NULL;
1064 PL_utf8_idstart = NULL;
1065 PL_utf8_idcont = NULL;
1067 if (!specialWARN(PL_compiling.cop_warnings))
1068 PerlMemShared_free(PL_compiling.cop_warnings);
1069 PL_compiling.cop_warnings = NULL;
1070 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1071 PL_compiling.cop_hints_hash = NULL;
1072 CopFILE_free(&PL_compiling);
1073 CopSTASH_free(&PL_compiling);
1075 /* Prepare to destruct main symbol table. */
1080 SvREFCNT_dec(PL_curstname);
1081 PL_curstname = NULL;
1083 /* clear queued errors */
1084 SvREFCNT_dec(PL_errors);
1088 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1089 if (PL_scopestack_ix != 0)
1090 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1091 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1092 (long)PL_scopestack_ix);
1093 if (PL_savestack_ix != 0)
1094 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1095 "Unbalanced saves: %ld more saves than restores\n",
1096 (long)PL_savestack_ix);
1097 if (PL_tmps_floor != -1)
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1099 (long)PL_tmps_floor + 1);
1100 if (cxstack_ix != -1)
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1102 (long)cxstack_ix + 1);
1105 /* Now absolutely destruct everything, somehow or other, loops or no. */
1106 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1107 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1109 /* the 2 is for PL_fdpid and PL_strtab */
1110 while (PL_sv_count > 2 && sv_clean_all())
1113 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1114 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1115 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1116 SvFLAGS(PL_strtab) |= SVt_PVHV;
1118 AvREAL_off(PL_fdpid); /* no surviving entries */
1119 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1122 #ifdef HAVE_INTERP_INTERN
1126 /* Destruct the global string table. */
1128 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1129 * so that sv_free() won't fail on them.
1130 * Now that the global string table is using a single hunk of memory
1131 * for both HE and HEK, we either need to explicitly unshare it the
1132 * correct way, or actually free things here.
1135 const I32 max = HvMAX(PL_strtab);
1136 HE * const * const array = HvARRAY(PL_strtab);
1137 HE *hent = array[0];
1140 if (hent && ckWARN_d(WARN_INTERNAL)) {
1141 HE * const next = HeNEXT(hent);
1142 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1143 "Unbalanced string table refcount: (%ld) for \"%s\"",
1144 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1151 hent = array[riter];
1156 HvARRAY(PL_strtab) = 0;
1157 HvTOTALKEYS(PL_strtab) = 0;
1158 HvFILL(PL_strtab) = 0;
1160 SvREFCNT_dec(PL_strtab);
1163 /* free the pointer tables used for cloning */
1164 ptr_table_free(PL_ptr_table);
1165 PL_ptr_table = (PTR_TBL_t*)NULL;
1168 /* free special SVs */
1170 SvREFCNT(&PL_sv_yes) = 0;
1171 sv_clear(&PL_sv_yes);
1172 SvANY(&PL_sv_yes) = NULL;
1173 SvFLAGS(&PL_sv_yes) = 0;
1175 SvREFCNT(&PL_sv_no) = 0;
1176 sv_clear(&PL_sv_no);
1177 SvANY(&PL_sv_no) = NULL;
1178 SvFLAGS(&PL_sv_no) = 0;
1182 for (i=0; i<=2; i++) {
1183 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1184 sv_clear(PERL_DEBUG_PAD(i));
1185 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1186 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1190 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1191 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1193 #ifdef DEBUG_LEAKING_SCALARS
1194 if (PL_sv_count != 0) {
1199 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1200 svend = &sva[SvREFCNT(sva)];
1201 for (sv = sva + 1; sv < svend; ++sv) {
1202 if (SvTYPE(sv) != SVTYPEMASK) {
1203 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1205 " refcnt=%"UVuf pTHX__FORMAT "\n"
1206 "\tallocated at %s:%d %s %s%s\n",
1207 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1208 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1210 sv->sv_debug_inpad ? "for" : "by",
1211 sv->sv_debug_optype ?
1212 PL_op_name[sv->sv_debug_optype]: "(none)",
1213 sv->sv_debug_cloned ? " (cloned)" : ""
1215 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1216 Perl_dump_sv_child(aTHX_ sv);
1222 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1226 /* Wait for up to 4 seconds for child to terminate.
1227 This seems to be the least effort way of timing out on reaping
1229 struct timeval waitfor = {4, 0};
1230 int sock = PL_dumper_fd;
1234 FD_SET(sock, &rset);
1235 select(sock + 1, &rset, NULL, NULL, &waitfor);
1236 waitpid(child, &status, WNOHANG);
1243 #ifdef PERL_DEBUG_READONLY_OPS
1249 #if defined(PERLIO_LAYERS)
1250 /* No more IO - including error messages ! */
1251 PerlIO_cleanup(aTHX);
1254 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1255 as currently layers use it rather than NULL as a marker
1256 for no arg - and will try and SvREFCNT_dec it.
1258 SvREFCNT(&PL_sv_undef) = 0;
1259 SvREADONLY_off(&PL_sv_undef);
1261 Safefree(PL_origfilename);
1262 PL_origfilename = NULL;
1263 Safefree(PL_reg_start_tmp);
1264 PL_reg_start_tmp = (char**)NULL;
1265 PL_reg_start_tmpl = 0;
1266 Safefree(PL_reg_curpm);
1267 Safefree(PL_reg_poscache);
1268 free_tied_hv_pool();
1269 Safefree(PL_op_mask);
1270 Safefree(PL_psig_ptr);
1271 PL_psig_ptr = (SV**)NULL;
1272 Safefree(PL_psig_name);
1273 PL_psig_name = (SV**)NULL;
1274 Safefree(PL_bitcount);
1276 Safefree(PL_psig_pend);
1277 PL_psig_pend = (int*)NULL;
1280 PL_tainting = FALSE;
1281 PL_taint_warn = FALSE;
1282 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1285 DEBUG_P(debprofdump());
1287 #ifdef USE_REENTRANT_API
1288 Perl_reentrant_free(aTHX);
1293 while (PL_regmatch_slab) {
1294 regmatch_slab *s = PL_regmatch_slab;
1295 PL_regmatch_slab = PL_regmatch_slab->next;
1299 /* As the absolutely last thing, free the non-arena SV for mess() */
1302 /* we know that type == SVt_PVMG */
1304 /* it could have accumulated taint magic */
1307 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1308 moremagic = mg->mg_moremagic;
1309 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1311 Safefree(mg->mg_ptr);
1315 /* we know that type >= SVt_PV */
1316 SvPV_free(PL_mess_sv);
1317 Safefree(SvANY(PL_mess_sv));
1318 Safefree(PL_mess_sv);
1325 =for apidoc perl_free
1327 Releases a Perl interpreter. See L<perlembed>.
1337 if (PL_veto_cleanup)
1340 #ifdef PERL_TRACK_MEMPOOL
1343 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1344 * value as we're probably hunting memory leaks then
1346 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1347 if (!s || atoi(s) == 0) {
1348 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1349 thread at thread exit. */
1350 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1351 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1356 #if defined(WIN32) || defined(NETWARE)
1357 # if defined(PERL_IMPLICIT_SYS)
1360 void *host = nw_internal_host;
1362 void *host = w32_internal_host;
1364 PerlMem_free(aTHXx);
1366 nw_delete_internal_host(host);
1368 win32_delete_internal_host(host);
1372 PerlMem_free(aTHXx);
1375 PerlMem_free(aTHXx);
1379 #if defined(USE_ITHREADS)
1380 /* provide destructors to clean up the thread key when libperl is unloaded */
1381 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1383 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1384 #pragma fini "perl_fini"
1385 #elif defined(__sun) && !defined(__GNUC__)
1386 #pragma fini (perl_fini)
1390 #if defined(__GNUC__)
1391 __attribute__((destructor))
1396 if (PL_curinterp && !PL_veto_cleanup)
1401 #endif /* THREADS */
1404 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1407 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1408 PL_exitlist[PL_exitlistlen].fn = fn;
1409 PL_exitlist[PL_exitlistlen].ptr = ptr;
1413 #ifdef HAS_PROCSELFEXE
1414 /* This is a function so that we don't hold on to MAXPATHLEN
1415 bytes of stack longer than necessary
1418 S_procself_val(pTHX_ SV *sv, const char *arg0)
1420 char buf[MAXPATHLEN];
1421 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1423 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1424 includes a spurious NUL which will cause $^X to fail in system
1425 or backticks (this will prevent extensions from being built and
1426 many tests from working). readlink is not meant to add a NUL.
1427 Normal readlink works fine.
1429 if (len > 0 && buf[len-1] == '\0') {
1433 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1434 returning the text "unknown" from the readlink rather than the path
1435 to the executable (or returning an error from the readlink). Any valid
1436 path has a '/' in it somewhere, so use that to validate the result.
1437 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1439 if (len > 0 && memchr(buf, '/', len)) {
1440 sv_setpvn(sv,buf,len);
1446 #endif /* HAS_PROCSELFEXE */
1449 S_set_caret_X(pTHX) {
1451 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1453 #ifdef HAS_PROCSELFEXE
1454 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1457 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1459 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1466 =for apidoc perl_parse
1468 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1474 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1481 PERL_UNUSED_ARG(my_perl);
1483 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1486 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1487 setuid perl scripts securely.\n");
1488 #endif /* IAMSUID */
1491 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1492 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1493 * This MUST be done before any hash stores or fetches take place.
1494 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1495 * yourself, it is your responsibility to provide a good random seed!
1496 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1497 if (!PL_rehash_seed_set)
1498 PL_rehash_seed = get_hash_seed();
1500 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1502 if (s && (atoi(s) == 1))
1503 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1505 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1510 if (PL_origalen != 0) {
1511 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1514 /* Set PL_origalen be the sum of the contiguous argv[]
1515 * elements plus the size of the env in case that it is
1516 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1517 * as the maximum modifiable length of $0. In the worst case
1518 * the area we are able to modify is limited to the size of
1519 * the original argv[0]. (See below for 'contiguous', though.)
1521 const char *s = NULL;
1524 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1525 /* Do the mask check only if the args seem like aligned. */
1527 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1529 /* See if all the arguments are contiguous in memory. Note
1530 * that 'contiguous' is a loose term because some platforms
1531 * align the argv[] and the envp[]. If the arguments look
1532 * like non-aligned, assume that they are 'strictly' or
1533 * 'traditionally' contiguous. If the arguments look like
1534 * aligned, we just check that they are within aligned
1535 * PTRSIZE bytes. As long as no system has something bizarre
1536 * like the argv[] interleaved with some other data, we are
1537 * fine. (Did I just evoke Murphy's Law?) --jhi */
1538 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1540 for (i = 1; i < PL_origargc; i++) {
1541 if ((PL_origargv[i] == s + 1
1543 || PL_origargv[i] == s + 2
1548 (PL_origargv[i] > s &&
1550 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1561 #ifndef PERL_USE_SAFE_PUTENV
1562 /* Can we grab env area too to be used as the area for $0? */
1563 if (s && PL_origenviron && !PL_use_safe_putenv) {
1564 if ((PL_origenviron[0] == s + 1)
1567 (PL_origenviron[0] > s &&
1568 PL_origenviron[0] <=
1569 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1572 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1573 s = PL_origenviron[0];
1576 my_setenv("NoNe SuCh", NULL);
1577 /* Force copy of environment. */
1578 for (i = 1; PL_origenviron[i]; i++) {
1579 if (PL_origenviron[i] == s + 1
1582 (PL_origenviron[i] > s &&
1583 PL_origenviron[i] <=
1584 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1587 s = PL_origenviron[i];
1595 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1597 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1602 /* Come here if running an undumped a.out. */
1604 PL_origfilename = savepv(argv[0]);
1605 PL_do_undump = FALSE;
1606 cxstack_ix = -1; /* start label stack again */
1608 assert (!PL_tainted);
1610 S_set_caret_X(aTHX);
1612 init_postdump_symbols(argc,argv,env);
1617 op_free(PL_main_root);
1618 PL_main_root = NULL;
1620 PL_main_start = NULL;
1621 SvREFCNT_dec(PL_main_cv);
1625 oldscope = PL_scopestack_ix;
1626 PL_dowarn = G_WARN_OFF;
1631 parse_body(env,xsinit);
1633 call_list(oldscope, PL_unitcheckav);
1635 call_list(oldscope, PL_checkav);
1642 /* my_exit() was called */
1643 while (PL_scopestack_ix > oldscope)
1646 PL_curstash = PL_defstash;
1648 call_list(oldscope, PL_unitcheckav);
1650 call_list(oldscope, PL_checkav);
1654 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1663 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1666 int argc = PL_origargc;
1667 char **argv = PL_origargv;
1668 const char *scriptname = NULL;
1669 VOL bool dosearch = FALSE;
1670 const char *validarg = "";
1672 register char *s, c;
1673 const char *cddir = NULL;
1674 #ifdef USE_SITECUSTOMIZE
1675 bool minus_f = FALSE;
1678 sv_setpvn(PL_linestr,"",0);
1679 sv = newSVpvs(""); /* first used for -I flags */
1683 for (argc--,argv++; argc > 0; argc--,argv++) {
1684 if (argv[0][0] != '-' || !argv[0][1])
1688 validarg = " PHOOEY ";
1692 * Can we rely on the kernel to start scripts with argv[1] set to
1693 * contain all #! line switches (the whole line)? (argv[0] is set to
1694 * the interpreter name, argv[2] to the script name; argv[3] and
1695 * above may contain other arguments.)
1702 #ifndef PERL_STRICT_CR
1727 if ((s = moreswitches(s)))
1732 CHECK_MALLOC_TOO_LATE_FOR('t');
1733 if( !PL_tainting ) {
1734 PL_taint_warn = TRUE;
1740 CHECK_MALLOC_TOO_LATE_FOR('T');
1742 PL_taint_warn = FALSE;
1750 #ifdef MACOS_TRADITIONAL
1751 /* ignore -e for Dev:Pseudo argument */
1752 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1755 forbid_setid('e', -1);
1757 PL_e_script = newSVpvs("");
1758 filter_add(read_e_script, NULL);
1761 sv_catpv(PL_e_script, s);
1763 sv_catpv(PL_e_script, argv[1]);
1767 Perl_croak(aTHX_ "No code specified for -%c", c);
1768 sv_catpvs(PL_e_script, "\n");
1772 #ifdef USE_SITECUSTOMIZE
1778 case 'I': /* -I handled both here and in moreswitches() */
1779 forbid_setid('I', -1);
1780 if (!*++s && (s=argv[1]) != NULL) {
1784 STRLEN len = strlen(s);
1785 const char * const p = savepvn(s, len);
1786 incpush(p, TRUE, TRUE, FALSE, FALSE);
1787 sv_catpvs(sv, "-I");
1788 sv_catpvn(sv, p, len);
1793 Perl_croak(aTHX_ "No directory specified for -I");
1796 forbid_setid('P', -1);
1797 PL_preprocess = TRUE;
1801 forbid_setid('S', -1);
1809 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1813 opts_prog = newSVpvs("print Config::myconfig(),");
1815 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1817 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1819 opts = SvCUR(opts_prog);
1821 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1825 # ifdef DEBUG_LEAKING_SCALARS
1826 " DEBUG_LEAKING_SCALARS"
1828 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1829 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1831 # ifdef FAKE_THREADS
1834 # ifdef MULTIPLICITY
1843 # ifdef PERL_DEBUG_READONLY_OPS
1844 " PERL_DEBUG_READONLY_OPS"
1846 # ifdef PERL_DONT_CREATE_GVSV
1847 " PERL_DONT_CREATE_GVSV"
1849 # ifdef PERL_GLOBAL_STRUCT
1850 " PERL_GLOBAL_STRUCT"
1852 # ifdef PERL_IMPLICIT_CONTEXT
1853 " PERL_IMPLICIT_CONTEXT"
1855 # ifdef PERL_IMPLICIT_SYS
1856 " PERL_IMPLICIT_SYS"
1861 # ifdef PERL_MALLOC_WRAP
1864 # ifdef PERL_MEM_LOG
1867 # ifdef PERL_MEM_LOG_ENV
1870 # ifdef PERL_MEM_LOG_ENV_FD
1871 " PERL_MEM_LOG_ENV_FD"
1873 # ifdef PERL_MEM_LOG_STDERR
1874 " PERL_MEM_LOG_STDERR"
1876 # ifdef PERL_MEM_LOG_TIMESTAMP
1877 " PERL_MEM_LOG_TIMESTAMP"
1879 # ifdef PERL_NEED_APPCTX
1882 # ifdef PERL_NEED_TIMESBASE
1883 " PERL_NEED_TIMESBASE"
1885 # ifdef PERL_OLD_COPY_ON_WRITE
1886 " PERL_OLD_COPY_ON_WRITE"
1891 # ifdef PERL_TRACK_MEMPOOL
1892 " PERL_TRACK_MEMPOOL"
1894 # ifdef PERL_USE_SAFE_PUTENV
1895 " PERL_USE_SAFE_PUTENV"
1897 # ifdef PERL_USES_PL_PIDSTATUS
1898 " PERL_USES_PL_PIDSTATUS"
1900 # ifdef PL_OP_SLAB_ALLOC
1903 # ifdef THREADS_HAVE_PIDS
1904 " THREADS_HAVE_PIDS"
1906 # ifdef USE_64_BIT_ALL
1909 # ifdef USE_64_BIT_INT
1912 # ifdef USE_ITHREADS
1915 # ifdef USE_LARGE_FILES
1918 # ifdef USE_LONG_DOUBLE
1924 # ifdef USE_REENTRANT_API
1925 " USE_REENTRANT_API"
1930 # ifdef USE_SITECUSTOMIZE
1931 " USE_SITECUSTOMIZE"
1938 while (SvCUR(opts_prog) > opts+76) {
1939 /* find last space after "options: " and before col 76
1943 char * const pv = SvPV_nolen(opts_prog);
1944 const char c = pv[opts+76];
1946 space = strrchr(pv+opts+26, ' ');
1948 if (!space) break; /* "Can't happen" */
1950 /* break the line before that space */
1953 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1954 STR_WITH_LEN("\\n "));
1957 sv_catpvs(opts_prog,"\\n\",");
1959 #if defined(LOCAL_PATCH_COUNT)
1960 if (LOCAL_PATCH_COUNT > 0) {
1962 sv_catpvs(opts_prog,
1963 "\" Locally applied patches:\\n\",");
1964 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1965 if (PL_localpatches[i])
1966 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1967 0, PL_localpatches[i], 0);
1971 Perl_sv_catpvf(aTHX_ opts_prog,
1972 "\" Built under %s\\n\"",OSNAME);
1975 Perl_sv_catpvf(aTHX_ opts_prog,
1976 ",\" Compiled at %s %s\\n\"",__DATE__,
1979 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1983 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1984 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1985 "sort grep {/^PERL/} keys %ENV; ");
1987 sv_catpvs(opts_prog,
1988 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1990 sv_catpvs(opts_prog,
1991 "print \" \\%ENV:\\n @env\\n\" if @env;"
1992 "print \" \\@INC:\\n @INC\\n\";");
1996 opts_prog = Perl_newSVpvf(aTHX_
1997 "Config::config_vars(qw%c%s%c)",
2001 av_push(PL_preambleav, opts_prog);
2002 /* don't look for script or read stdin */
2003 scriptname = BIT_BUCKET;
2007 PL_doextract = TRUE;
2015 if (!*++s || isSPACE(*s)) {
2019 /* catch use of gnu style long options */
2020 if (strEQ(s, "version")) {
2024 if (strEQ(s, "help")) {
2031 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2037 #ifndef SECURE_INTERNAL_GETENV
2040 (s = PerlEnv_getenv("PERL5OPT")))
2042 const char *popt = s;
2045 if (*s == '-' && *(s+1) == 'T') {
2046 CHECK_MALLOC_TOO_LATE_FOR('T');
2048 PL_taint_warn = FALSE;
2051 char *popt_copy = NULL;
2064 if (!strchr("CDIMUdmtwA", *s))
2065 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2069 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2070 s = popt_copy + (s - popt);
2071 d = popt_copy + (d - popt);
2078 if( !PL_tainting ) {
2079 PL_taint_warn = TRUE;
2089 #ifdef USE_SITECUSTOMIZE
2091 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2092 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2097 scriptname = argv[0];
2100 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2102 else if (scriptname == NULL) {
2104 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2110 /* Set $^X early so that it can be used for relocatable paths in @INC */
2111 assert (!PL_tainted);
2113 S_set_caret_X(aTHX);
2120 = open_script(scriptname, dosearch, sv, &suidscript);
2122 validate_suid(validarg, scriptname, fdscript, suidscript);
2125 # if defined(SIGCHLD) || defined(SIGCLD)
2128 # define SIGCHLD SIGCLD
2130 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2131 if (sigstate == (Sighandler_t) SIG_IGN) {
2132 if (ckWARN(WARN_SIGNAL))
2133 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2134 "Can't ignore signal CHLD, forcing to default");
2135 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2142 #ifdef MACOS_TRADITIONAL
2143 || gMacPerl_AlwaysExtract
2147 /* This will croak if suidscript is >= 0, as -x cannot be used with
2149 forbid_setid('x', suidscript);
2150 /* Hence you can't get here if suidscript >= 0 */
2153 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2154 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2158 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2159 CvUNIQUE_on(PL_compcv);
2161 CvPADLIST(PL_compcv) = pad_new(0);
2164 boot_core_UNIVERSAL();
2165 boot_core_xsutils();
2168 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2170 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2176 # ifdef HAS_SOCKS5_INIT
2177 socks5_init(argv[0]);
2183 init_predump_symbols();
2184 /* init_postdump_symbols not currently designed to be called */
2185 /* more than once (ENV isn't cleared first, for example) */
2186 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2188 init_postdump_symbols(argc,argv,env);
2190 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2191 * or explicitly in some platforms.
2192 * locale.c:Perl_init_i18nl10n() if the environment
2193 * look like the user wants to use UTF-8. */
2194 #if defined(__SYMBIAN32__)
2195 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2198 /* Requires init_predump_symbols(). */
2199 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2204 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2205 * and the default open disciplines. */
2206 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2207 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2211 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2213 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2214 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2215 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2217 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2218 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2219 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2221 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2222 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2225 sv_setpvn(sv, ":utf8\0:utf8", 11);
2227 sv_setpvn(sv, ":utf8\0", 6);
2230 sv_setpvn(sv, "\0:utf8", 6);
2236 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2237 if (strEQ(s, "unsafe"))
2238 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2239 else if (strEQ(s, "safe"))
2240 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2242 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2246 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2250 PL_xmlfp = PerlIO_stdout();
2252 PL_xmlfp = PerlIO_open(s, "w");
2254 Perl_croak(aTHX_ "Can't open %s", s);
2256 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2258 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2259 PL_madskills = atoi(s);
2260 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2266 /* now parse the script */
2268 SETERRNO(0,SS_NORMAL);
2270 #ifdef MACOS_TRADITIONAL
2271 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2273 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2275 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2276 MacPerl_MPWFileName(PL_origfilename));
2280 if (yyparse() || PL_error_count) {
2282 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2284 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2289 CopLINE_set(PL_curcop, 0);
2290 PL_curstash = PL_defstash;
2291 PL_preprocess = FALSE;
2293 SvREFCNT_dec(PL_e_script);
2301 SAVECOPFILE(PL_curcop);
2302 SAVECOPLINE(PL_curcop);
2303 gv_check(PL_defstash);
2310 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2311 dump_mstats("after compilation:");
2320 =for apidoc perl_run
2322 Tells a Perl interpreter to run. See L<perlembed>.
2335 PERL_UNUSED_ARG(my_perl);
2337 oldscope = PL_scopestack_ix;
2345 cxstack_ix = -1; /* start context stack again */
2347 case 0: /* normal completion */
2351 case 2: /* my_exit() */
2352 while (PL_scopestack_ix > oldscope)
2355 PL_curstash = PL_defstash;
2356 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2357 PL_endav && !PL_minus_c)
2358 call_list(oldscope, PL_endav);
2360 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2361 dump_mstats("after execution: ");
2367 POPSTACK_TO(PL_mainstack);
2370 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2381 S_run_body(pTHX_ I32 oldscope)
2384 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2385 PL_sawampersand ? "Enabling" : "Omitting"));
2387 if (!PL_restartop) {
2391 exit(0); /* less likely to core dump than my_exit(0) */
2394 DEBUG_x(dump_all());
2397 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2399 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2403 #ifdef MACOS_TRADITIONAL
2404 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2405 (gMacPerl_ErrorFormat ? "# " : ""),
2406 MacPerl_MPWFileName(PL_origfilename));
2408 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2412 if (PERLDB_SINGLE && PL_DBsingle)
2413 sv_setiv(PL_DBsingle, 1);
2415 call_list(oldscope, PL_initav);
2416 #ifdef PERL_DEBUG_READONLY_OPS
2417 Perl_pending_Slabs_to_ro(aTHX);
2424 PL_op = PL_restartop;
2428 else if (PL_main_start) {
2429 CvDEPTH(PL_main_cv) = 1;
2430 PL_op = PL_main_start;
2438 =head1 SV Manipulation Functions
2440 =for apidoc p||get_sv
2442 Returns the SV of the specified Perl scalar. 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_sv(pTHX_ const char *name, I32 create)
2453 gv = gv_fetchpv(name, create, SVt_PV);
2460 =head1 Array Manipulation Functions
2462 =for apidoc p||get_av
2464 Returns the AV of the specified Perl array. If C<create> is set and the
2465 Perl variable does not exist then it will be created. If C<create> is not
2466 set and the variable does not exist then NULL is returned.
2472 Perl_get_av(pTHX_ const char *name, I32 create)
2474 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2483 =head1 Hash Manipulation Functions
2485 =for apidoc p||get_hv
2487 Returns the HV of the specified Perl hash. If C<create> is set and the
2488 Perl variable does not exist then it will be created. If C<create> is not
2489 set and the variable does not exist then NULL is returned.
2495 Perl_get_hv(pTHX_ const char *name, I32 create)
2497 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2506 =head1 CV Manipulation Functions
2508 =for apidoc p||get_cvn_flags
2510 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2511 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2512 exist then it will be declared (which has the same effect as saying
2513 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2514 then NULL is returned.
2516 =for apidoc p||get_cv
2518 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2524 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2526 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2527 /* XXX this is probably not what they think they're getting.
2528 * It has the same effect as "sub name;", i.e. just a forward
2530 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2531 SV *const sv = newSVpvn(name,len);
2532 SvFLAGS(sv) |= flags & SVf_UTF8;
2533 return newSUB(start_subparse(FALSE, 0),
2534 newSVOP(OP_CONST, 0, sv),
2543 Perl_get_cv(pTHX_ const char *name, I32 flags)
2545 return get_cvn_flags(name, strlen(name), flags);
2548 /* Be sure to refetch the stack pointer after calling these routines. */
2552 =head1 Callback Functions
2554 =for apidoc p||call_argv
2556 Performs a callback to the specified Perl sub. See L<perlcall>.
2562 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2564 /* See G_* flags in cop.h */
2565 /* null terminated arg list */
2573 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2578 return call_pv(sub_name, flags);
2582 =for apidoc p||call_pv
2584 Performs a callback to the specified Perl sub. See L<perlcall>.
2590 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2591 /* name of the subroutine */
2592 /* See G_* flags in cop.h */
2594 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2598 =for apidoc p||call_method
2600 Performs a callback to the specified Perl method. The blessed object must
2601 be on the stack. See L<perlcall>.
2607 Perl_call_method(pTHX_ const char *methname, I32 flags)
2608 /* name of the subroutine */
2609 /* See G_* flags in cop.h */
2611 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2614 /* May be called with any of a CV, a GV, or an SV containing the name. */
2616 =for apidoc p||call_sv
2618 Performs a callback to the Perl sub whose name is in the SV. See
2625 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2626 /* See G_* flags in cop.h */
2629 LOGOP myop; /* fake syntax tree node */
2634 bool oldcatch = CATCH_GET;
2636 OP* const oldop = PL_op;
2639 if (flags & G_DISCARD) {
2644 Zero(&myop, 1, LOGOP);
2645 myop.op_next = NULL;
2646 if (!(flags & G_NOARGS))
2647 myop.op_flags |= OPf_STACKED;
2648 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2649 (flags & G_ARRAY) ? OPf_WANT_LIST :
2654 EXTEND(PL_stack_sp, 1);
2655 *++PL_stack_sp = sv;
2657 oldscope = PL_scopestack_ix;
2659 if (PERLDB_SUB && PL_curstash != PL_debstash
2660 /* Handle first BEGIN of -d. */
2661 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2662 /* Try harder, since this may have been a sighandler, thus
2663 * curstash may be meaningless. */
2664 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2665 && !(flags & G_NODEBUG))
2666 PL_op->op_private |= OPpENTERSUB_DB;
2668 if (flags & G_METHOD) {
2669 Zero(&method_op, 1, UNOP);
2670 method_op.op_next = PL_op;
2671 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2672 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2673 PL_op = (OP*)&method_op;
2676 if (!(flags & G_EVAL)) {
2678 CALL_BODY_SUB((OP*)&myop);
2679 retval = PL_stack_sp - (PL_stack_base + oldmark);
2680 CATCH_SET(oldcatch);
2683 myop.op_other = (OP*)&myop;
2685 create_eval_scope(flags|G_FAKINGEVAL);
2693 CALL_BODY_SUB((OP*)&myop);
2694 retval = PL_stack_sp - (PL_stack_base + oldmark);
2695 if (!(flags & G_KEEPERR))
2696 sv_setpvn(ERRSV,"",0);
2702 /* my_exit() was called */
2703 PL_curstash = PL_defstash;
2706 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2707 Perl_croak(aTHX_ "Callback called exit");
2712 PL_op = PL_restartop;
2716 PL_stack_sp = PL_stack_base + oldmark;
2717 if (flags & G_ARRAY)
2721 *++PL_stack_sp = &PL_sv_undef;
2726 if (PL_scopestack_ix > oldscope)
2727 delete_eval_scope();
2731 if (flags & G_DISCARD) {
2732 PL_stack_sp = PL_stack_base + oldmark;
2741 /* Eval a string. The G_EVAL flag is always assumed. */
2744 =for apidoc p||eval_sv
2746 Tells Perl to C<eval> the string in the SV.
2752 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2754 /* See G_* flags in cop.h */
2758 UNOP myop; /* fake syntax tree node */
2759 VOL I32 oldmark = SP - PL_stack_base;
2762 OP* const oldop = PL_op;
2765 if (flags & G_DISCARD) {
2772 Zero(PL_op, 1, UNOP);
2773 EXTEND(PL_stack_sp, 1);
2774 *++PL_stack_sp = sv;
2776 if (!(flags & G_NOARGS))
2777 myop.op_flags = OPf_STACKED;
2778 myop.op_next = NULL;
2779 myop.op_type = OP_ENTEREVAL;
2780 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2781 (flags & G_ARRAY) ? OPf_WANT_LIST :
2783 if (flags & G_KEEPERR)
2784 myop.op_flags |= OPf_SPECIAL;
2786 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2787 * before a PUSHEVAL, which corrupts the stack after a croak */
2788 TAINT_PROPER("eval_sv()");
2794 CALL_BODY_EVAL((OP*)&myop);
2795 retval = PL_stack_sp - (PL_stack_base + oldmark);
2796 if (!(flags & G_KEEPERR))
2797 sv_setpvn(ERRSV,"",0);
2803 /* my_exit() was called */
2804 PL_curstash = PL_defstash;
2807 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2808 Perl_croak(aTHX_ "Callback called exit");
2813 PL_op = PL_restartop;
2817 PL_stack_sp = PL_stack_base + oldmark;
2818 if (flags & G_ARRAY)
2822 *++PL_stack_sp = &PL_sv_undef;
2828 if (flags & G_DISCARD) {
2829 PL_stack_sp = PL_stack_base + oldmark;
2839 =for apidoc p||eval_pv
2841 Tells Perl to C<eval> the given string and return an SV* result.
2847 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2851 SV* sv = newSVpv(p, 0);
2853 eval_sv(sv, G_SCALAR);
2860 if (croak_on_error && SvTRUE(ERRSV)) {
2861 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2867 /* Require a module. */
2870 =head1 Embedding Functions
2872 =for apidoc p||require_pv
2874 Tells Perl to C<require> the file named by the string argument. It is
2875 analogous to the Perl code C<eval "require '$file'">. It's even
2876 implemented that way; consider using load_module instead.
2881 Perl_require_pv(pTHX_ const char *pv)
2886 PUSHSTACKi(PERLSI_REQUIRE);
2888 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2889 eval_sv(sv_2mortal(sv), G_DISCARD);
2895 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2897 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2900 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2904 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2906 /* This message really ought to be max 23 lines.
2907 * Removed -h because the user already knows that option. Others? */
2909 static const char * const usage_msg[] = {
2910 "-0[octal] specify record separator (\\0, if no argument)",
2911 "-A[mod][=pattern] activate all/given assertions",
2912 "-a autosplit mode with -n or -p (splits $_ into @F)",
2913 "-C[number/list] enables the listed Unicode features",
2914 "-c check syntax only (runs BEGIN and CHECK blocks)",
2915 "-d[:debugger] run program under debugger",
2916 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2917 "-e program one line of program (several -e's allowed, omit programfile)",
2918 "-E program like -e, but enables all optional features",
2919 "-f don't do $sitelib/sitecustomize.pl at startup",
2920 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2921 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2922 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2923 "-l[octal] enable line ending processing, specifies line terminator",
2924 "-[mM][-]module execute \"use/no module...\" before executing program",
2925 "-n assume \"while (<>) { ... }\" loop around program",
2926 "-p assume loop like -n but print line also, like sed",
2927 "-P run program through C preprocessor before compilation",
2928 "-s enable rudimentary parsing for switches after programfile",
2929 "-S look for programfile using PATH environment variable",
2930 "-t enable tainting warnings",
2931 "-T enable tainting checks",
2932 "-u dump core after parsing program",
2933 "-U allow unsafe operations",
2934 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2935 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2936 "-w enable many useful warnings (RECOMMENDED)",
2937 "-W enable all warnings",
2938 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2939 "-X disable all warnings",
2943 const char * const *p = usage_msg;
2945 PerlIO_printf(PerlIO_stdout(),
2946 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2949 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2952 /* convert a string of -D options (or digits) into an int.
2953 * sets *s to point to the char after the options */
2957 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2959 static const char * const usage_msgd[] = {
2960 " Debugging flag values: (see also -d)",
2961 " p Tokenizing and parsing (with v, displays parse stack)",
2962 " s Stack snapshots (with v, displays all stacks)",
2963 " l Context (loop) stack processing",
2964 " t Trace execution",
2965 " o Method and overloading resolution",
2966 " c String/numeric conversions",
2967 " P Print profiling info, preprocessor command for -P, source file input state",
2968 " m Memory allocation",
2969 " f Format processing",
2970 " r Regular expression parsing and execution",
2971 " x Syntax tree dump",
2972 " u Tainting checks",
2973 " H Hash dump -- usurps values()",
2974 " X Scratchpad allocation",
2976 " S Thread synchronization",
2978 " R Include reference counts of dumped variables (eg when using -Ds)",
2979 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2980 " v Verbose: use in conjunction with other flags",
2982 " A Consistency checks on internal structures",
2983 " q quiet - currently only suppresses the 'EXECUTING' message",
2988 /* if adding extra options, remember to update DEBUG_MASK */
2989 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2991 for (; isALNUM(**s); (*s)++) {
2992 const char * const d = strchr(debopts,**s);
2994 i |= 1 << (d - debopts);
2995 else if (ckWARN_d(WARN_DEBUGGING))
2996 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2997 "invalid option -D%c, use -D'' to see choices\n", **s);
3000 else if (isDIGIT(**s)) {
3002 for (; isALNUM(**s); (*s)++) ;
3004 else if (givehelp) {
3005 const char *const *p = usage_msgd;
3006 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3009 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3010 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3011 "-Dp not implemented on this platform\n");
3017 /* This routine handles any switches that can be given during run */
3020 Perl_moreswitches(pTHX_ char *s)
3031 SvREFCNT_dec(PL_rs);
3032 if (s[1] == 'x' && s[2]) {
3033 const char *e = s+=2;
3039 flags = PERL_SCAN_SILENT_ILLDIGIT;
3040 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3041 if (s + numlen < e) {
3042 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3046 PL_rs = newSVpvs("");
3047 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3048 tmps = (U8*)SvPVX(PL_rs);
3049 uvchr_to_utf8(tmps, rschar);
3050 SvCUR_set(PL_rs, UNISKIP(rschar));
3055 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3056 if (rschar & ~((U8)~0))
3057 PL_rs = &PL_sv_undef;
3058 else if (!rschar && numlen >= 2)
3059 PL_rs = newSVpvs("");
3061 char ch = (char)rschar;
3062 PL_rs = newSVpvn(&ch, 1);
3065 sv_setsv(get_sv("/", TRUE), PL_rs);
3070 PL_unicode = parse_unicode_opts( (const char **)&s );
3071 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3077 while (*s && !isSPACE(*s)) ++s;
3078 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3089 forbid_setid('d', -1);
3092 /* -dt indicates to the debugger that threads will be used */
3093 if (*s == 't' && !isALNUM(s[1])) {
3095 my_setenv("PERL5DB_THREADED", "1");
3098 /* The following permits -d:Mod to accepts arguments following an =
3099 in the fashion that -MSome::Mod does. */
3100 if (*s == ':' || *s == '=') {
3102 SV * const sv = newSVpvs("use Devel::");
3104 /* We now allow -d:Module=Foo,Bar */
3105 while(isALNUM(*s) || *s==':') ++s;
3107 sv_catpv(sv, start);
3109 sv_catpvn(sv, start, s-start);
3110 /* Don't use NUL as q// delimiter here, this string goes in the
3112 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3115 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3118 PL_perldb = PERLDB_ALL;
3125 forbid_setid('D', -1);
3127 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3128 #else /* !DEBUGGING */
3129 if (ckWARN_d(WARN_DEBUGGING))
3130 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3131 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3132 for (s++; isALNUM(*s); s++) ;
3137 usage(PL_origargv[0]);
3140 Safefree(PL_inplace);
3141 #if defined(__CYGWIN__) /* do backup extension automagically */
3142 if (*(s+1) == '\0') {
3143 PL_inplace = savepvs(".bak");
3146 #endif /* __CYGWIN__ */
3148 const char * const start = ++s;
3149 while (*s && !isSPACE(*s))
3152 PL_inplace = savepvn(start, s - start);
3156 if (*s == '-') /* Additional switches on #! line. */
3160 case 'I': /* -I handled both here and in parse_body() */
3161 forbid_setid('I', -1);
3163 while (*s && isSPACE(*s))
3168 /* ignore trailing spaces (possibly followed by other switches) */
3170 for (e = p; *e && !isSPACE(*e); e++) ;
3174 } while (*p && *p != '-');
3175 e = savepvn(s, e-s);
3176 incpush(e, TRUE, TRUE, FALSE, FALSE);
3183 Perl_croak(aTHX_ "No directory specified for -I");
3189 SvREFCNT_dec(PL_ors_sv);
3195 PL_ors_sv = newSVpvs("\n");
3196 numlen = 3 + (*s == '0');
3197 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3201 if (RsPARA(PL_rs)) {
3202 PL_ors_sv = newSVpvs("\n\n");
3205 PL_ors_sv = newSVsv(PL_rs);
3210 forbid_setid('A', -1);
3213 char * const start = s;
3214 SV * const sv = newSVpvs("use assertions::activate");
3215 while(isALNUM(*s) || *s == ':') ++s;
3217 sv_catpvs(sv, "::");
3218 sv_catpvn(sv, start, s-start);
3221 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3224 else if (*s != '\0') {
3225 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3227 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3231 forbid_setid('M', -1); /* XXX ? */
3234 forbid_setid('m', -1); /* XXX ? */
3238 const char *use = "use ";
3239 /* -M-foo == 'no foo' */
3240 /* Leading space on " no " is deliberate, to make both
3241 possibilities the same length. */
3242 if (*s == '-') { use = " no "; ++s; }
3243 sv = newSVpvn(use,4);
3245 /* We allow -M'Module qw(Foo Bar)' */
3246 while(isALNUM(*s) || *s==':') ++s;
3248 sv_catpv(sv, start);
3249 if (*(start-1) == 'm') {
3251 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3252 sv_catpvs( sv, " ()");
3256 Perl_croak(aTHX_ "Module name required with -%c option",
3258 sv_catpvn(sv, start, s-start);
3259 sv_catpvs(sv, " split(/,/,q");
3260 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3262 sv_catpvs(sv, "\0)");
3265 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3268 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3279 forbid_setid('s', -1);
3280 PL_doswitches = TRUE;
3294 #ifdef MACOS_TRADITIONAL
3295 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3297 PL_do_undump = TRUE;
3305 if (!sv_derived_from(PL_patchlevel, "version"))
3306 upg_version(PL_patchlevel, TRUE);
3308 PerlIO_printf(PerlIO_stdout(),
3309 Perl_form(aTHX_ "\nThis is perl, %"SVf
3310 #ifdef PERL_PATCHNUM
3311 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3314 SVfARG(vstringify(PL_patchlevel)),
3317 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3318 PerlIO_printf(PerlIO_stdout(),
3319 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3320 SVfARG(vstringify(PL_patchlevel))));
3321 PerlIO_printf(PerlIO_stdout(),
3322 Perl_form(aTHX_ " built under %s at %s %s\n",
3323 OSNAME, __DATE__, __TIME__));
3324 PerlIO_printf(PerlIO_stdout(),
3325 Perl_form(aTHX_ " OS Specific Release: %s\n",
3329 #if defined(LOCAL_PATCH_COUNT)
3330 if (LOCAL_PATCH_COUNT > 0)
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\n(with %d registered patch%s, "
3333 "see perl -V for more detail)",
3335 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3338 PerlIO_printf(PerlIO_stdout(),
3339 "\n\nCopyright 1987-2007, Larry Wall\n");
3340 #ifdef MACOS_TRADITIONAL
3341 PerlIO_printf(PerlIO_stdout(),
3342 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3343 "maintained by Chris Nandor\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3352 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3355 PerlIO_printf(PerlIO_stdout(),
3356 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3357 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "atariST series port, ++jrb bammi@cadence.com\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3388 PerlIO_printf(PerlIO_stdout(),
3389 "MiNT port by Guido Flohr, 1997-1999\n");
3392 PerlIO_printf(PerlIO_stdout(),
3393 "EPOC port by Olaf Flebbe, 1999-2002\n");
3396 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3397 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3400 #ifdef __SYMBIAN32__
3401 PerlIO_printf(PerlIO_stdout(),
3402 "Symbian port by Nokia, 2004-2005\n");
3404 #ifdef BINARY_BUILD_NOTICE
3405 BINARY_BUILD_NOTICE;
3407 PerlIO_printf(PerlIO_stdout(),
3409 Perl may be copied only under the terms of either the Artistic License or the\n\
3410 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3411 Complete documentation for Perl, including FAQ lists, should be found on\n\
3412 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3413 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3416 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3417 PL_dowarn |= G_WARN_ON;
3422 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3423 if (!specialWARN(PL_compiling.cop_warnings))
3424 PerlMemShared_free(PL_compiling.cop_warnings);
3425 PL_compiling.cop_warnings = pWARN_ALL ;
3429 PL_dowarn = G_WARN_ALL_OFF;
3430 if (!specialWARN(PL_compiling.cop_warnings))
3431 PerlMemShared_free(PL_compiling.cop_warnings);
3432 PL_compiling.cop_warnings = pWARN_NONE ;
3437 if (s[1] == '-') /* Additional switches on #! line. */
3442 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3448 #ifdef ALTERNATE_SHEBANG
3449 case 'S': /* OS/2 needs -S on "extproc" line. */
3457 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3462 /* compliments of Tom Christiansen */
3464 /* unexec() can be found in the Gnu emacs distribution */
3465 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3468 Perl_my_unexec(pTHX)
3470 PERL_UNUSED_CONTEXT;
3472 SV * prog = newSVpv(BIN_EXP, 0);
3473 SV * file = newSVpv(PL_origfilename, 0);
3477 sv_catpvs(prog, "/perl");
3478 sv_catpvs(file, ".perldump");
3480 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3481 /* unexec prints msg to stderr in case of failure */
3482 PerlProc_exit(status);
3485 # include <lib$routines.h>
3486 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3487 # elif defined(WIN32) || defined(__CYGWIN__)
3488 Perl_croak(aTHX_ "dump is not supported");
3490 ABORT(); /* for use with undump */
3495 /* initialize curinterp */
3501 # define PERLVAR(var,type)
3502 # define PERLVARA(var,n,type)
3503 # if defined(PERL_IMPLICIT_CONTEXT)
3504 # define PERLVARI(var,type,init) aTHX->var = init;
3505 # define PERLVARIC(var,type,init) aTHX->var = init;
3507 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3508 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3510 # include "intrpvar.h"
3511 # include "thrdvar.h"
3517 # define PERLVAR(var,type)
3518 # define PERLVARA(var,n,type)
3519 # define PERLVARI(var,type,init) PL_##var = init;
3520 # define PERLVARIC(var,type,init) PL_##var = init;
3521 # include "intrpvar.h"
3522 # include "thrdvar.h"
3529 /* As these are inside a structure, PERLVARI isn't capable of initialising
3531 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3532 PL_reg_poscache = PL_reg_starttry = NULL;
3536 S_init_main_stash(pTHX)
3541 PL_curstash = PL_defstash = newHV();
3542 /* We know that the string "main" will be in the global shared string
3543 table, so it's a small saving to use it rather than allocate another
3545 PL_curstname = newSVpvs_share("main");
3546 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3547 /* If we hadn't caused another reference to "main" to be in the shared
3548 string table above, then it would be worth reordering these two,
3549 because otherwise all we do is delete "main" from it as a consequence
3550 of the SvREFCNT_dec, only to add it again with hv_name_set */
3551 SvREFCNT_dec(GvHV(gv));
3552 hv_name_set(PL_defstash, "main", 4, 0);
3553 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3555 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3557 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3558 GvMULTI_on(PL_incgv);
3559 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3560 GvMULTI_on(PL_hintgv);
3561 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3562 SvREFCNT_inc_simple_void(PL_defgv);
3563 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3564 SvREFCNT_inc_simple_void(PL_errgv);
3565 GvMULTI_on(PL_errgv);
3566 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3567 GvMULTI_on(PL_replgv);
3568 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3569 #ifdef PERL_DONT_CREATE_GVSV
3572 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3573 sv_setpvn(ERRSV, "", 0);
3574 PL_curstash = PL_defstash;
3575 CopSTASH_set(&PL_compiling, PL_defstash);
3576 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3577 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3579 /* We must init $/ before switches are processed. */
3580 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3584 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3590 const char *cpp_discard_flag;
3599 PL_origfilename = savepvs("-e");
3602 /* if find_script() returns, it returns a malloc()-ed value */
3603 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3605 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3606 const char *s = scriptname + 8;
3612 * Tell apart "normal" usage of fdscript, e.g.
3613 * with bash on FreeBSD:
3614 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3615 * from usage in suidperl.
3616 * Does any "normal" usage leave garbage after the number???
3617 * Is it a mistake to use a similar /dev/fd/ construct for
3622 * Be supersafe and do some sanity-checks.
3623 * Still, can we be sure we got the right thing?
3626 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3629 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3631 scriptname = savepv(s + 1);
3632 Safefree(PL_origfilename);
3633 PL_origfilename = (char *)scriptname;
3638 CopFILE_free(PL_curcop);
3639 CopFILE_set(PL_curcop, PL_origfilename);
3640 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3641 scriptname = (char *)"";
3642 if (fdscript >= 0) {
3643 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3644 # if defined(HAS_FCNTL) && defined(F_SETFD)
3646 /* ensure close-on-exec */
3647 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3652 Perl_croak(aTHX_ "sperl needs fd script\n"
3653 "You should not call sperl directly; do you need to "
3654 "change a #! line\nfrom sperl to perl?\n");
3657 * Do not open (or do other fancy stuff) while setuid.
3658 * Perl does the open, and hands script to suidperl on a fd;
3659 * suidperl only does some checks, sets up UIDs and re-execs
3660 * perl with that fd as it has always done.
3663 if (*suidscript != 1) {
3664 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3667 else if (PL_preprocess) {
3668 const char * const cpp_cfg = CPPSTDIN;
3669 SV * const cpp = newSVpvs("");
3670 SV * const cmd = newSV(0);
3672 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3673 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3674 if (strEQ(cpp_cfg, "cppstdin"))
3675 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3676 sv_catpv(cpp, cpp_cfg);
3679 sv_catpvs(sv, "-I");
3680 sv_catpv(sv,PRIVLIB_EXP);
3683 DEBUG_P(PerlIO_printf(Perl_debug_log,
3684 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3685 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3688 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3695 cpp_discard_flag = "";
3697 cpp_discard_flag = "-C";
3701 perl = os2_execname(aTHX);
3703 perl = PL_origargv[0];
3707 /* This strips off Perl comments which might interfere with
3708 the C pre-processor, including #!. #line directives are
3709 deliberately stripped to avoid confusion with Perl's version
3710 of #line. FWP played some golf with it so it will fit
3711 into VMS's 255 character buffer.
3714 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3716 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3718 Perl_sv_setpvf(aTHX_ cmd, "\
3719 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3720 perl, quote, code, quote, scriptname, SVfARG(cpp),
3721 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3723 PL_doextract = FALSE;
3725 DEBUG_P(PerlIO_printf(Perl_debug_log,
3726 "PL_preprocess: cmd=\"%s\"\n",
3729 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3733 else if (!*scriptname) {
3734 forbid_setid(0, *suidscript);
3735 PL_rsfp = PerlIO_stdin();
3738 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3739 # if defined(HAS_FCNTL) && defined(F_SETFD)
3741 /* ensure close-on-exec */
3742 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3745 #endif /* IAMSUID */
3747 /* PSz 16 Sep 03 Keep neat error message */
3749 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3751 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3752 CopFILE(PL_curcop), Strerror(errno));
3758 * I_SYSSTATVFS HAS_FSTATVFS
3760 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3761 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3762 * here so that metaconfig picks them up. */
3766 S_fd_on_nosuid_fs(pTHX_ int fd)
3769 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3770 * but is needed also on machines without setreuid.
3771 * Seems safe enough to run as root.
3773 int check_okay = 0; /* able to do all the required sys/libcalls */
3774 int on_nosuid = 0; /* the fd is on a nosuid fs */
3776 * Need to check noexec also: nosuid might not be set, the average
3777 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3779 int on_noexec = 0; /* the fd is on a noexec fs */
3782 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3783 * fstatvfs() is UNIX98.
3784 * fstatfs() is 4.3 BSD.
3785 * ustat()+getmnt() is pre-4.3 BSD.
3786 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3787 * an irrelevant filesystem while trying to reach the right one.
3790 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3792 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3793 defined(HAS_FSTATVFS)
3794 # define FD_ON_NOSUID_CHECK_OKAY
3795 struct statvfs stfs;
3797 check_okay = fstatvfs(fd, &stfs) == 0;
3798 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3800 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3801 on platforms where it is present. */
3802 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3804 # endif /* fstatvfs */
3806 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3807 defined(PERL_MOUNT_NOSUID) && \
3808 defined(PERL_MOUNT_NOEXEC) && \
3809 defined(HAS_FSTATFS) && \
3810 defined(HAS_STRUCT_STATFS) && \
3811 defined(HAS_STRUCT_STATFS_F_FLAGS)
3812 # define FD_ON_NOSUID_CHECK_OKAY
3815 check_okay = fstatfs(fd, &stfs) == 0;
3816 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3817 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3818 # endif /* fstatfs */
3820 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3821 defined(PERL_MOUNT_NOSUID) && \
3822 defined(PERL_MOUNT_NOEXEC) && \
3823 defined(HAS_FSTAT) && \
3824 defined(HAS_USTAT) && \
3825 defined(HAS_GETMNT) && \
3826 defined(HAS_STRUCT_FS_DATA) && \
3828 # define FD_ON_NOSUID_CHECK_OKAY
3831 if (fstat(fd, &fdst) == 0) {
3833 if (ustat(fdst.st_dev, &us) == 0) {
3835 /* NOSTAT_ONE here because we're not examining fields which
3836 * vary between that case and STAT_ONE. */
3837 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3838 size_t cmplen = sizeof(us.f_fname);
3839 if (sizeof(fsd.fd_req.path) < cmplen)
3840 cmplen = sizeof(fsd.fd_req.path);
3841 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3842 fdst.st_dev == fsd.fd_req.dev) {
3844 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3845 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3850 # endif /* fstat+ustat+getmnt */
3852 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3853 defined(HAS_GETMNTENT) && \
3854 defined(HAS_HASMNTOPT) && \
3855 defined(MNTOPT_NOSUID) && \
3856 defined(MNTOPT_NOEXEC)
3857 # define FD_ON_NOSUID_CHECK_OKAY
3858 FILE *mtab = fopen("/etc/mtab", "r");
3859 struct mntent *entry;
3862 if (mtab && (fstat(fd, &stb) == 0)) {
3863 while (entry = getmntent(mtab)) {
3864 if (stat(entry->mnt_dir, &fsb) == 0
3865 && fsb.st_dev == stb.st_dev)
3867 /* found the filesystem */
3869 if (hasmntopt(entry, MNTOPT_NOSUID))
3871 if (hasmntopt(entry, MNTOPT_NOEXEC))
3874 } /* A single fs may well fail its stat(). */
3879 # endif /* getmntent+hasmntopt */
3882 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3884 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3886 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3887 return ((!check_okay) || on_nosuid || on_noexec);
3889 #endif /* IAMSUID */
3892 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3893 int fdscript, int suidscript)
3898 #endif /* IAMSUID */
3900 /* do we need to emulate setuid on scripts? */
3902 /* This code is for those BSD systems that have setuid #! scripts disabled
3903 * in the kernel because of a security problem. Merely defining DOSUID
3904 * in perl will not fix that problem, but if you have disabled setuid
3905 * scripts in the kernel, this will attempt to emulate setuid and setgid
3906 * on scripts that have those now-otherwise-useless bits set. The setuid
3907 * root version must be called suidperl or sperlN.NNN. If regular perl
3908 * discovers that it has opened a setuid script, it calls suidperl with
3909 * the same argv that it had. If suidperl finds that the script it has
3910 * just opened is NOT setuid root, it sets the effective uid back to the
3911 * uid. We don't just make perl setuid root because that loses the
3912 * effective uid we had before invoking perl, if it was different from the
3915 * Description/comments above do not match current workings:
3916 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3917 * suidperl called with script open and name changed to /dev/fd/N/X;
3918 * suidperl croaks if script is not setuid;
3919 * making perl setuid would be a huge security risk (and yes, that
3920 * would lose any euid we might have had).
3922 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3923 * be defined in suidperl only. suidperl must be setuid root. The
3924 * Configure script will set this up for you if you want it.
3930 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3931 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3932 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3934 const char *linestr;
3938 if (fdscript < 0 || suidscript != 1)
3939 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3941 * Since the script is opened by perl, not suidperl, some of these
3942 * checks are superfluous. Leaving them in probably does not lower
3946 * Do checks even for systems with no HAS_SETREUID.
3947 * We used to swap, then re-swap UIDs with
3949 if (setreuid(PL_euid,PL_uid) < 0
3950 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3951 Perl_croak(aTHX_ "Can't swap uid and euid");
3954 if (setreuid(PL_uid,PL_euid) < 0
3955 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3956 Perl_croak(aTHX_ "Can't reswap uid and euid");
3960 /* On this access check to make sure the directories are readable,
3961 * there is actually a small window that the user could use to make
3962 * filename point to an accessible directory. So there is a faint
3963 * chance that someone could execute a setuid script down in a
3964 * non-accessible directory. I don't know what to do about that.
3965 * But I don't think it's too important. The manual lies when
3966 * it says access() is useful in setuid programs.
3968 * So, access() is pretty useless... but not harmful... do anyway.
3970 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3971 Perl_croak(aTHX_ "Can't access() script\n");
3974 /* If we can swap euid and uid, then we can determine access rights
3975 * with a simple stat of the file, and then compare device and
3976 * inode to make sure we did stat() on the same file we opened.
3977 * Then we just have to make sure he or she can execute it.
3980 * As the script is opened by perl, not suidperl, we do not need to
3981 * care much about access rights.
3983 * The 'script changed' check is needed, or we can get lied to
3984 * about $0 with e.g.
3985 * suidperl /dev/fd/4//bin/x 4<setuidscript
3986 * Without HAS_SETREUID, is it safe to stat() as root?
3988 * Are there any operating systems that pass /dev/fd/xxx for setuid
3989 * scripts, as suggested/described in perlsec(1)? Surely they do not
3990 * pass the script name as we do, so the "script changed" test would
3991 * fail for them... but we never get here with
3992 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3994 * This is one place where we must "lie" about return status: not
3995 * say if the stat() failed. We are doing this as root, and could
3996 * be tricked into reporting existence or not of files that the
3997 * "plain" user cannot even see.
4001 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4002 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4003 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4004 Perl_croak(aTHX_ "Setuid script changed\n");
4008 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4009 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4012 * We used to do this check as the "plain" user (after swapping
4013 * UIDs). But the check for nosuid and noexec filesystem is needed,
4014 * and should be done even without HAS_SETREUID. (Maybe those
4015 * operating systems do not have such mount options anyway...)
4016 * Seems safe enough to do as root.
4018 #if !defined(NO_NOSUID_CHECK)
4019 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4020 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4023 #endif /* IAMSUID */
4025 if (!S_ISREG(PL_statbuf.st_mode)) {
4026 Perl_croak(aTHX_ "Setuid script not plain file\n");
4028 if (PL_statbuf.st_mode & S_IWOTH)
4029 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4030 PL_doswitches = FALSE; /* -s is insecure in suid */
4031 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4032 CopLINE_inc(PL_curcop);
4033 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4034 Perl_croak(aTHX_ "No #! line");
4035 linestr = SvPV_nolen_const(PL_linestr);
4036 /* required even on Sys V */
4037 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4038 Perl_croak(aTHX_ "No #! line");
4042 /* Sanity check on line length */
4043 s_end = s + strlen(s);
4044 if (s_end == s || (s_end - s) > 4000)
4045 Perl_croak(aTHX_ "Very long #! line");
4046 /* Allow more than a single space after #! */
4047 while (isSPACE(*s)) s++;
4048 /* Sanity check on buffer end */
4049 while ((*s) && !isSPACE(*s)) s++;
4050 for (s2 = s; (s2 > linestr &&
4051 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4052 || s2[-1] == '-')); s2--) ;
4053 /* Sanity check on buffer start */
4054 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4055 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4056 Perl_croak(aTHX_ "Not a perl script");
4057 while (*s == ' ' || *s == '\t') s++;
4059 * #! arg must be what we saw above. They can invoke it by
4060 * mentioning suidperl explicitly, but they may not add any strange
4061 * arguments beyond what #! says if they do invoke suidperl that way.
4064 * The way validarg was set up, we rely on the kernel to start
4065 * scripts with argv[1] set to contain all #! line switches (the
4069 * Check that we got all the arguments listed in the #! line (not
4070 * just that there are no extraneous arguments). Might not matter
4071 * much, as switches from #! line seem to be acted upon (also), and
4072 * so may be checked and trapped in perl. But, security checks must
4073 * be done in suidperl and not deferred to perl. Note that suidperl
4074 * does not get around to parsing (and checking) the switches on
4075 * the #! line (but execs perl sooner).
4076 * Allow (require) a trailing newline (which may be of two
4077 * characters on some architectures?) (but no other trailing
4080 len = strlen(validarg);
4081 if (strEQ(validarg," PHOOEY ") ||
4082 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4083 !((s_end - s) == len+1
4084 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4085 Perl_croak(aTHX_ "Args must match #! line");
4089 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4090 PL_euid == PL_statbuf.st_uid)
4092 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4093 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4094 #endif /* IAMSUID */
4097 PL_euid) { /* oops, we're not the setuid root perl */
4099 * When root runs a setuid script, we do not go through the same
4100 * steps of execing sperl and then perl with fd scripts, but
4101 * simply set up UIDs within the same perl invocation; so do
4102 * not have the same checks (on options, whatever) that we have
4103 * for plain users. No problem really: would have to be a script
4104 * that does not actually work for plain users; and if root is
4105 * foolish and can be persuaded to run such an unsafe script, he
4106 * might run also non-setuid ones, and deserves what he gets.
4108 * Or, we might drop the PL_euid check above (and rely just on
4109 * fdscript to avoid loops), and do the execs
4115 * Pass fd script to suidperl.
4116 * Exec suidperl, substituting fd script for scriptname.
4117 * Pass script name as "subdir" of fd, which perl will grok;
4118 * in fact will use that to distinguish this from "normal"
4119 * usage, see comments above.
4121 PerlIO_rewind(PL_rsfp);
4122 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4123 /* PSz 27 Feb 04 Sanity checks on scriptname */
4124 if ((!scriptname) || (!*scriptname) ) {
4125 Perl_croak(aTHX_ "No setuid script name\n");
4127 if (*scriptname == '-') {
4128 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4129 /* Or we might confuse it with an option when replacing
4130 * name in argument list, below (though we do pointer, not
4131 * string, comparisons).
4134 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4135 if (!PL_origargv[which]) {
4136 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4138 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4139 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4140 #if defined(HAS_FCNTL) && defined(F_SETFD)
4141 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4144 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4145 (int)PERL_REVISION, (int)PERL_VERSION,
4146 (int)PERL_SUBVERSION), PL_origargv);
4148 #endif /* IAMSUID */
4149 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4152 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4154 * This seems back to front: we try HAS_SETEGID first; if not available
4155 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4156 * in the sense that we only want to set EGID; but are there any machines
4157 * with either of the latter, but not the former? Same with UID, later.
4160 (void)setegid(PL_statbuf.st_gid);
4163 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4165 #ifdef HAS_SETRESGID
4166 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4168 PerlProc_setgid(PL_statbuf.st_gid);
4172 if (PerlProc_getegid() != PL_statbuf.st_gid)
4173 Perl_croak(aTHX_ "Can't do setegid!\n");
4175 if (PL_statbuf.st_mode & S_ISUID) {
4176 if (PL_statbuf.st_uid != PL_euid)
4178 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4181 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4183 #ifdef HAS_SETRESUID
4184 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4186 PerlProc_setuid(PL_statbuf.st_uid);
4190 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4191 Perl_croak(aTHX_ "Can't do seteuid!\n");
4193 else if (PL_uid) { /* oops, mustn't run as root */
4195 (void)seteuid((Uid_t)PL_uid);
4198 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4200 #ifdef HAS_SETRESUID
4201 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4203 PerlProc_setuid((Uid_t)PL_uid);
4207 if (PerlProc_geteuid() != PL_uid)
4208 Perl_croak(aTHX_ "Can't do seteuid!\n");
4211 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4212 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4215 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4216 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4217 else if (fdscript < 0 || suidscript != 1)
4218 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4219 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4221 /* PSz 16 Sep 03 Keep neat error message */
4222 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4225 /* We absolutely must clear out any saved ids here, so we */
4226 /* exec the real perl, substituting fd script for scriptname. */
4227 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4229 * It might be thought that using setresgid and/or setresuid (changed to
4230 * set the saved IDs) above might obviate the need to exec, and we could
4231 * go on to "do the perl thing".
4233 * Is there such a thing as "saved GID", and is that set for setuid (but
4234 * not setgid) execution like suidperl? Without exec, it would not be
4235 * cleared for setuid (but not setgid) scripts (or might need a dummy
4238 * We need suidperl to do the exact same argument checking that perl
4239 * does. Thus it cannot be very small; while it could be significantly
4240 * smaller, it is safer (simpler?) to make it essentially the same
4241 * binary as perl (but they are not identical). - Maybe could defer that
4242 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4243 * but prefer to do thorough checks in suidperl itself. Such deferral
4244 * would make suidperl security rely on perl, a design no-no.
4246 * Setuid things should be short and simple, thus easy to understand and
4247 * verify. They should do their "own thing", without influence by
4248 * attackers. It may help if their internal execution flow is fixed,
4249 * regardless of platform: it may be best to exec anyway.
4251 * Suidperl should at least be conceptually simple: a wrapper only,
4252 * never to do any real perl. Maybe we should put
4254 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4256 * into the perly bits.
4258 PerlIO_rewind(PL_rsfp);
4259 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4261 * Keep original arguments: suidperl already has fd script.
4263 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4264 /* if (!PL_origargv[which]) { */
4265 /* errno = EPERM; */
4266 /* Perl_croak(aTHX_ "Permission denied\n"); */
4268 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4269 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4270 #if defined(HAS_FCNTL) && defined(F_SETFD)
4271 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4274 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4275 (int)PERL_REVISION, (int)PERL_VERSION,
4276 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4278 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4279 #endif /* IAMSUID */
4281 PERL_UNUSED_ARG(fdscript);
4282 PERL_UNUSED_ARG(suidscript);
4283 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4284 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4285 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4286 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4288 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4291 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4292 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4293 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4294 /* not set-id, must be wrapped */
4297 PERL_UNUSED_ARG(validarg);
4298 PERL_UNUSED_ARG(scriptname);
4302 S_find_beginning(pTHX)
4306 register const char *s2;
4307 #ifdef MACOS_TRADITIONAL
4311 /* skip forward in input to the real script? */
4313 #ifdef MACOS_TRADITIONAL
4314 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4316 while (PL_doextract || gMacPerl_AlwaysExtract) {
4317 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4318 if (!gMacPerl_AlwaysExtract)
4319 Perl_croak(aTHX_ "No Perl script found in input\n");
4321 if (PL_doextract) /* require explicit override ? */
4322 if (!OverrideExtract(PL_origfilename))
4323 Perl_croak(aTHX_ "User aborted script\n");
4325 PL_doextract = FALSE;
4327 /* Pater peccavi, file does not have #! */
4328 PerlIO_rewind(PL_rsfp);
4333 while (PL_doextract) {
4334 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4335 Perl_croak(aTHX_ "No Perl script found in input\n");
4338 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4339 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4340 PL_doextract = FALSE;
4341 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4343 while (*s == ' ' || *s == '\t') s++;
4345 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4346 || s2[-1] == '_') s2--;
4347 if (strnEQ(s2-4,"perl",4))
4348 while ((s = moreswitches(s)))
4351 #ifdef MACOS_TRADITIONAL
4352 /* We are always searching for the #!perl line in MacPerl,
4353 * so if we find it, still keep the line count correct
4354 * by counting lines we already skipped over
4356 for (; maclines > 0 ; maclines--)
4357 PerlIO_ungetc(PL_rsfp, '\n');
4361 /* gMacPerl_AlwaysExtract is false in MPW tool */
4362 } else if (gMacPerl_AlwaysExtract) {
4374 PL_uid = PerlProc_getuid();
4375 PL_euid = PerlProc_geteuid();
4376 PL_gid = PerlProc_getgid();
4377 PL_egid = PerlProc_getegid();
4379 PL_uid |= PL_gid << 16;
4380 PL_euid |= PL_egid << 16;
4382 /* Should not happen: */
4383 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4384 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4387 * Should go by suidscript, not uid!=euid: why disallow
4388 * system("ls") in scripts run from setuid things?
4389 * Or, is this run before we check arguments and set suidscript?
4390 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4391 * (We never have suidscript, can we be sure to have fdscript?)
4392 * Or must then go by UID checks? See comments in forbid_setid also.
4396 /* This is used very early in the lifetime of the program,
4397 * before even the options are parsed, so PL_tainting has
4398 * not been initialized properly. */
4400 Perl_doing_taint(int argc, char *argv[], char *envp[])
4402 #ifndef PERL_IMPLICIT_SYS
4403 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4404 * before we have an interpreter-- and the whole point of this
4405 * function is to be called at such an early stage. If you are on
4406 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4407 * "tainted because running with altered effective ids', you'll
4408 * have to add your own checks somewhere in here. The two most
4409 * known samples of 'implicitness' are Win32 and NetWare, neither
4410 * of which has much of concept of 'uids'. */
4411 int uid = PerlProc_getuid();
4412 int euid = PerlProc_geteuid();
4413 int gid = PerlProc_getgid();
4414 int egid = PerlProc_getegid();
4421 if (uid && (euid != uid || egid != gid))
4423 #endif /* !PERL_IMPLICIT_SYS */
4424 /* This is a really primitive check; environment gets ignored only
4425 * if -T are the first chars together; otherwise one gets
4426 * "Too late" message. */
4427 if ( argc > 1 && argv[1][0] == '-'
4428 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4433 /* Passing the flag as a single char rather than a string is a slight space
4434 optimisation. The only message that isn't /^-.$/ is
4435 "program input from stdin", which is substituted in place of '\0', which
4436 could never be a command line flag. */
4438 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4441 char string[3] = "-x";
4442 const char *message = "program input from stdin";
4449 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4450 if (PL_euid != PL_uid)
4451 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4452 if (PL_egid != PL_gid)
4453 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4454 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4456 * Checks for UID/GID above "wrong": why disallow
4457 * perl -e 'print "Hello\n"'
4458 * from within setuid things?? Simply drop them: replaced by
4459 * fdscript/suidscript and #ifdef IAMSUID checks below.
4461 * This may be too late for command-line switches. Will catch those on
4462 * the #! line, after finding the script name and setting up
4463 * fdscript/suidscript. Note that suidperl does not get around to
4464 * parsing (and checking) the switches on the #! line, but checks that
4465 * the two sets are identical.
4467 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4468 * instead, or would that be "too late"? (We never have suidscript, can
4469 * we be sure to have fdscript?)
4471 * Catch things with suidscript (in descendant of suidperl), even with
4472 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4473 * below; but I am paranoid.
4475 * Also see comments about root running a setuid script, elsewhere.
4477 if (suidscript >= 0)
4478 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4480 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4481 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4482 #endif /* IAMSUID */
4486 Perl_init_debugger(pTHX)
4489 HV * const ostash = PL_curstash;
4491 PL_curstash = PL_debstash;
4492 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4494 AvREAL_off(PL_dbargs);
4495 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4496 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4497 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4498 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4499 sv_setiv(PL_DBsingle, 0);
4500 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4501 sv_setiv(PL_DBtrace, 0);
4502 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4503 sv_setiv(PL_DBsignal, 0);
4504 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4505 sv_setiv(PL_DBassertion, 0);
4506 PL_curstash = ostash;
4509 #ifndef STRESS_REALLOC
4510 #define REASONABLE(size) (size)
4512 #define REASONABLE(size) (1) /* unreasonable */
4516 Perl_init_stacks(pTHX)
4519 /* start with 128-item stack and 8K cxstack */
4520 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4521 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4522 PL_curstackinfo->si_type = PERLSI_MAIN;
4523 PL_curstack = PL_curstackinfo->si_stack;
4524 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4526 PL_stack_base = AvARRAY(PL_curstack);
4527 PL_stack_sp = PL_stack_base;
4528 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4530 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4533 PL_tmps_max = REASONABLE(128);
4535 Newx(PL_markstack,REASONABLE(32),I32);
4536 PL_markstack_ptr = PL_markstack;
4537 PL_markstack_max = PL_markstack + REASONABLE(32);
4541 Newx(PL_scopestack,REASONABLE(32),I32);
4542 PL_scopestack_ix = 0;
4543 PL_scopestack_max = REASONABLE(32);
4545 Newx(PL_savestack,REASONABLE(128),ANY);
4546 PL_savestack_ix = 0;
4547 PL_savestack_max = REASONABLE(128);
4556 while (PL_curstackinfo->si_next)
4557 PL_curstackinfo = PL_curstackinfo->si_next;
4558 while (PL_curstackinfo) {
4559 PERL_SI *p = PL_curstackinfo->si_prev;
4560 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4561 Safefree(PL_curstackinfo->si_cxstack);
4562 Safefree(PL_curstackinfo);
4563 PL_curstackinfo = p;
4565 Safefree(PL_tmps_stack);
4566 Safefree(PL_markstack);
4567 Safefree(PL_scopestack);
4568 Safefree(PL_savestack);
4578 lex_start(PL_linestr);
4580 PL_subname = newSVpvs("main");
4584 S_init_predump_symbols(pTHX)
4590 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4591 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4592 GvMULTI_on(PL_stdingv);
4593 io = GvIOp(PL_stdingv);
4594 IoTYPE(io) = IoTYPE_RDONLY;
4595 IoIFP(io) = PerlIO_stdin();
4596 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4598 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4600 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4603 IoTYPE(io) = IoTYPE_WRONLY;
4604 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4606 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4608 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4610 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4611 GvMULTI_on(PL_stderrgv);
4612 io = GvIOp(PL_stderrgv);
4613 IoTYPE(io) = IoTYPE_WRONLY;
4614 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4615 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4617 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4619 PL_statname = newSV(0); /* last filename we did stat on */
4621 Safefree(PL_osname);
4622 PL_osname = savepv(OSNAME);
4626 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4629 argc--,argv++; /* skip name of script */
4630 if (PL_doswitches) {
4631 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4635 if (argv[0][1] == '-' && !argv[0][2]) {
4639 if ((s = strchr(argv[0], '='))) {
4640 const char *const start_name = argv[0] + 1;
4641 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4642 TRUE, SVt_PV)), s + 1);
4645 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4648 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4649 GvMULTI_on(PL_argvgv);
4650 (void)gv_AVadd(PL_argvgv);
4651 av_clear(GvAVn(PL_argvgv));
4652 for (; argc > 0; argc--,argv++) {
4653 SV * const sv = newSVpv(argv[0],0);
4654 av_push(GvAVn(PL_argvgv),sv);
4655 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4656 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4659 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4660 (void)sv_utf8_decode(sv);
4666 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4671 PL_toptarget = newSV_type(SVt_PVFM);
4672 sv_setpvn(PL_toptarget, "", 0);
4673 PL_bodytarget = newSV_type(SVt_PVFM);
4674 sv_setpvn(PL_bodytarget, "", 0);
4675 PL_formtarget = PL_bodytarget;
4679 init_argv_symbols(argc,argv);
4681 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4682 #ifdef MACOS_TRADITIONAL
4683 /* $0 is not majick on a Mac */
4684 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4686 sv_setpv(GvSV(tmpgv),PL_origfilename);
4687 magicname("0", "0", 1);
4690 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4692 bool env_is_not_environ;
4693 GvMULTI_on(PL_envgv);
4694 hv = GvHVn(PL_envgv);
4695 hv_magic(hv, NULL, PERL_MAGIC_env);
4697 #ifdef USE_ENVIRON_ARRAY
4698 /* Note that if the supplied env parameter is actually a copy
4699 of the global environ then it may now point to free'd memory
4700 if the environment has been modified since. To avoid this
4701 problem we treat env==NULL as meaning 'use the default'
4705 env_is_not_environ = env != environ;
4706 if (env_is_not_environ
4707 # ifdef USE_ITHREADS
4708 && PL_curinterp == aTHX
4717 for (; *env; env++) {
4718 if (!(s = strchr(*env,'=')) || s == *env)
4720 #if defined(MSDOS) && !defined(DJGPP)
4725 sv = newSVpv(s+1, 0);
4726 (void)hv_store(hv, *env, s - *env, sv, 0);
4727 if (env_is_not_environ)
4731 #endif /* USE_ENVIRON_ARRAY */
4732 #endif /* !PERL_MICRO */
4735 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4736 SvREADONLY_off(GvSV(tmpgv));
4737 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4738 SvREADONLY_on(GvSV(tmpgv));
4740 #ifdef THREADS_HAVE_PIDS
4741 PL_ppid = (IV)getppid();
4744 /* touch @F array to prevent spurious warnings 20020415 MJD */
4746 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4751 S_init_perllib(pTHX)
4757 s = PerlEnv_getenv("PERL5LIB");
4759 * It isn't possible to delete an environment variable with
4760 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4761 * case we treat PERL5LIB as undefined if it has a zero-length value.
4763 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4764 if (s && *s != '\0')
4768 incpush(s, TRUE, TRUE, TRUE, FALSE);
4770 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4772 /* Treat PERL5?LIB as a possible search list logical name -- the
4773 * "natural" VMS idiom for a Unix path string. We allow each
4774 * element to be a set of |-separated directories for compatibility.
4778 if (my_trnlnm("PERL5LIB",buf,0))
4779 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4781 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4785 /* Use the ~-expanded versions of APPLLIB (undocumented),
4786 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4789 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4793 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4795 #ifdef MACOS_TRADITIONAL
4798 SV * privdir = newSV(0);
4799 char * macperl = PerlEnv_getenv("MACPERL");
4804 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4805 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4806 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4807 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4808 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4809 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4811 SvREFCNT_dec(privdir);
4814 incpush(":", FALSE, FALSE, TRUE, FALSE);
4817 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4820 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4822 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4826 /* sitearch is always relative to sitelib on Windows for
4827 * DLL-based path intuition to work correctly */
4828 # if !defined(WIN32)
4829 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4835 /* this picks up sitearch as well */
4836 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4838 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4842 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4843 /* Search for version-specific dirs below here */
4844 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4847 #ifdef PERL_VENDORARCH_EXP
4848 /* vendorarch is always relative to vendorlib on Windows for
4849 * DLL-based path intuition to work correctly */
4850 # if !defined(WIN32)
4851 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4855 #ifdef PERL_VENDORLIB_EXP
4857 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4859 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4863 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4864 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4867 #ifdef PERL_OTHERLIBDIRS
4868 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4872 incpush(".", FALSE, FALSE, TRUE, FALSE);
4873 #endif /* MACOS_TRADITIONAL */
4876 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4877 # define PERLLIB_SEP ';'
4880 # define PERLLIB_SEP '|'
4882 # if defined(MACOS_TRADITIONAL)
4883 # define PERLLIB_SEP ','
4885 # define PERLLIB_SEP ':'
4889 #ifndef PERLLIB_MANGLE
4890 # define PERLLIB_MANGLE(s,n) (s)
4893 /* Push a directory onto @INC if it exists.
4894 Generate a new SV if we do this, to save needing to copy the SV we push
4897 S_incpush_if_exists(pTHX_ SV *dir)
4901 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4902 S_ISDIR(tmpstatbuf.st_mode)) {
4903 av_push(GvAVn(PL_incgv), dir);
4910 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4915 const char *p = dir;
4920 if (addsubdirs || addoldvers) {
4924 /* Break at all separators */
4926 SV *libdir = newSV(0);
4929 /* skip any consecutive separators */
4931 while ( *p == PERLLIB_SEP ) {
4932 /* Uncomment the next line for PATH semantics */
4933 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4938 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4939 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4944 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4945 p = NULL; /* break out */
4947 #ifdef MACOS_TRADITIONAL
4948 if (!strchr(SvPVX(libdir), ':')) {
4951 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4953 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4954 sv_catpvs(libdir, ":");
4957 /* Do the if() outside the #ifdef to avoid warnings about an unused
4960 #ifdef PERL_RELOCATABLE_INC
4962 * Relocatable include entries are marked with a leading .../
4965 * 0: Remove that leading ".../"
4966 * 1: Remove trailing executable name (anything after the last '/')
4967 * from the perl path to give a perl prefix
4969 * While the @INC element starts "../" and the prefix ends with a real
4970 * directory (ie not . or ..) chop that real directory off the prefix
4971 * and the leading "../" from the @INC element. ie a logical "../"
4973 * Finally concatenate the prefix and the remainder of the @INC element
4974 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4975 * generates /usr/local/lib/perl5
4977 const char *libpath = SvPVX(libdir);
4978 STRLEN libpath_len = SvCUR(libdir);
4979 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4981 SV * const caret_X = get_sv("\030", 0);
4982 /* Going to use the SV just as a scratch buffer holding a C
4988 /* $^X is *the* source of taint if tainting is on, hence
4989 SvPOK() won't be true. */
4991 assert(SvPOKp(caret_X));
4992 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4993 /* Firstly take off the leading .../
4994 If all else fail we'll do the paths relative to the current
4996 sv_chop(libdir, libpath + 4);
4997 /* Don't use SvPV as we're intentionally bypassing taining,
4998 mortal copies that the mg_get of tainting creates, and
4999 corruption that seems to come via the save stack.
5000 I guess that the save stack isn't correctly set up yet. */
5001 libpath = SvPVX(libdir);
5002 libpath_len = SvCUR(libdir);
5004 /* This would work more efficiently with memrchr, but as it's
5005 only a GNU extension we'd need to probe for it and
5006 implement our own. Not hard, but maybe not worth it? */
5008 prefix = SvPVX(prefix_sv);
5009 lastslash = strrchr(prefix, '/');
5011 /* First time in with the *lastslash = '\0' we just wipe off
5012 the trailing /perl from (say) /usr/foo/bin/perl
5016 while ((*lastslash = '\0'), /* Do that, come what may. */
5017 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5018 && (lastslash = strrchr(prefix, '/')))) {
5019 if (lastslash[1] == '\0'
5020 || (lastslash[1] == '.'
5021 && (lastslash[2] == '/' /* ends "/." */
5022 || (lastslash[2] == '/'
5023 && lastslash[3] == '/' /* or "/.." */
5025 /* Prefix ends "/" or "/." or "/..", any of which
5026 are fishy, so don't do any more logical cleanup.
5030 /* Remove leading "../" from path */
5033 /* Next iteration round the loop removes the last
5034 directory name from prefix by writing a '\0' in
5035 the while clause. */
5037 /* prefix has been terminated with a '\0' to the correct
5038 length. libpath points somewhere into the libdir SV.
5039 We need to join the 2 with '/' and drop the result into
5041 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5042 SvREFCNT_dec(libdir);
5043 /* And this is the new libdir. */
5046 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5047 /* Need to taint reloccated paths if running set ID */
5048 SvTAINTED_on(libdir);
5051 SvREFCNT_dec(prefix_sv);
5056 * BEFORE pushing libdir onto @INC we may first push version- and
5057 * archname-specific sub-directories.
5059 if (addsubdirs || addoldvers) {
5060 #ifdef PERL_INC_VERSION_LIST
5061 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5062 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5063 const char * const *incver;
5069 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5071 while (unix[len-1] == '/') len--; /* Cosmetic */
5072 sv_usepvn(libdir,unix,len);
5075 PerlIO_printf(Perl_error_log,
5076 "Failed to unixify @INC element \"%s\"\n",
5080 #ifdef MACOS_TRADITIONAL
5081 #define PERL_AV_SUFFIX_FMT ""
5082 #define PERL_ARCH_FMT "%s:"
5083 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5085 #define PERL_AV_SUFFIX_FMT "/"
5086 #define PERL_ARCH_FMT "/%s"
5087 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5089 /* .../version/archname if -d .../version/archname */
5090 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5092 (int)PERL_REVISION, (int)PERL_VERSION,
5093 (int)PERL_SUBVERSION, ARCHNAME);
5094 subdir = S_incpush_if_exists(aTHX_ subdir);
5096 /* .../version if -d .../version */
5097 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5099 (int)PERL_REVISION, (int)PERL_VERSION,
5100 (int)PERL_SUBVERSION);
5101 subdir = S_incpush_if_exists(aTHX_ subdir);
5103 /* .../archname if -d .../archname */
5104 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5105 SVfARG(libdir), ARCHNAME);
5106 subdir = S_incpush_if_exists(aTHX_ subdir);
5110 #ifdef PERL_INC_VERSION_LIST
5112 for (incver = incverlist; *incver; incver++) {
5113 /* .../xxx if -d .../xxx */
5114 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5115 SVfARG(libdir), *incver);
5116 subdir = S_incpush_if_exists(aTHX_ subdir);
5122 /* finally push this lib directory on the end of @INC */
5123 av_push(GvAVn(PL_incgv), libdir);
5126 assert (SvREFCNT(subdir) == 1);
5127 SvREFCNT_dec(subdir);
5133 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5137 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5143 while (av_len(paramList) >= 0) {
5144 cv = (CV*)av_shift(paramList);
5146 if (paramList == PL_beginav) {
5147 /* save PL_beginav for compiler */
5148 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5150 else if (paramList == PL_checkav) {
5151 /* save PL_checkav for compiler */
5152 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5154 else if (paramList == PL_unitcheckav) {
5155 /* save PL_unitcheckav for compiler */
5156 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5167 PL_madskills |= 16384;
5172 PL_madskills &= ~16384;
5175 (void)SvPV_const(atsv, len);
5177 PL_curcop = &PL_compiling;
5178 CopLINE_set(PL_curcop, oldline);
5179 if (paramList == PL_beginav)
5180 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5182 Perl_sv_catpvf(aTHX_ atsv,
5183 "%s failed--call queue aborted",
5184 paramList == PL_checkav ? "CHECK"
5185 : paramList == PL_initav ? "INIT"
5186 : paramList == PL_unitcheckav ? "UNITCHECK"
5188 while (PL_scopestack_ix > oldscope)
5191 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5198 /* my_exit() was called */
5199 while (PL_scopestack_ix > oldscope)
5202 PL_curstash = PL_defstash;
5203 PL_curcop = &PL_compiling;
5204 CopLINE_set(PL_curcop, oldline);
5206 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5207 if (paramList == PL_beginav)
5208 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5210 Perl_croak(aTHX_ "%s failed--call queue aborted",
5211 paramList == PL_checkav ? "CHECK"
5212 : paramList == PL_initav ? "INIT"
5213 : paramList == PL_unitcheckav ? "UNITCHECK"
5220 PL_curcop = &PL_compiling;
5221 CopLINE_set(PL_curcop, oldline);
5224 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5233 Perl_my_exit(pTHX_ U32 status)
5236 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5237 (void*)thr, (unsigned long) status));
5246 STATUS_EXIT_SET(status);
5253 Perl_my_failure_exit(pTHX)
5257 /* We have been called to fall on our sword. The desired exit code
5258 * should be already set in STATUS_UNIX, but could be shifted over
5259 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5262 * If an error code has not been set, then force the issue.
5264 if (MY_POSIX_EXIT) {
5266 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5267 * the exit code when there isn't an error.
5270 if (STATUS_UNIX == 0)
5271 STATUS_UNIX_EXIT_SET(255);
5273 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5275 /* The exit code could have been set by $? or vmsish which
5276 * means that it may not be fatal. So convert
5277 * success/warning codes to fatal.
5279 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5280 STATUS_UNIX_EXIT_SET(255);
5284 /* Traditionally Perl on VMS always expects a Fatal Error. */
5285 if (vaxc$errno & 1) {
5287 /* So force success status to failure */
5288 if (STATUS_NATIVE & 1)
5293 STATUS_UNIX = EINTR; /* In case something cares */
5298 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5300 /* Encode the severity code */
5301 severity = STATUS_NATIVE & STS$M_SEVERITY;
5302 STATUS_UNIX = (severity ? severity : 1) << 8;
5304 /* Perl expects this to be a fatal error */
5305 if (severity != STS$K_SEVERE)
5314 STATUS_UNIX_SET(errno);
5316 exitstatus = STATUS_UNIX >> 8;
5317 if (exitstatus & 255)
5318 STATUS_UNIX_SET(exitstatus);
5320 STATUS_UNIX_SET(255);
5327 S_my_exit_jump(pTHX)
5332 SvREFCNT_dec(PL_e_script);
5336 POPSTACK_TO(PL_mainstack);
5344 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5347 const char * const p = SvPVX_const(PL_e_script);
5348 const char *nl = strchr(p, '\n');
5350 PERL_UNUSED_ARG(idx);
5351 PERL_UNUSED_ARG(maxlen);
5353 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5355 filter_del(read_e_script);
5358 sv_catpvn(buf_sv, p, nl-p);
5359 sv_chop(PL_e_script, nl);
5365 * c-indentation-style: bsd
5367 * indent-tabs-mode: t
5370 * ex: set ts=8 sts=4 sw=4 noet: