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);
1244 #if defined(PERLIO_LAYERS)
1245 /* No more IO - including error messages ! */
1246 PerlIO_cleanup(aTHX);
1249 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1250 as currently layers use it rather than NULL as a marker
1251 for no arg - and will try and SvREFCNT_dec it.
1253 SvREFCNT(&PL_sv_undef) = 0;
1254 SvREADONLY_off(&PL_sv_undef);
1256 Safefree(PL_origfilename);
1257 PL_origfilename = NULL;
1258 Safefree(PL_reg_start_tmp);
1259 PL_reg_start_tmp = (char**)NULL;
1260 PL_reg_start_tmpl = 0;
1261 Safefree(PL_reg_curpm);
1262 Safefree(PL_reg_poscache);
1263 free_tied_hv_pool();
1264 Safefree(PL_op_mask);
1265 Safefree(PL_psig_ptr);
1266 PL_psig_ptr = (SV**)NULL;
1267 Safefree(PL_psig_name);
1268 PL_psig_name = (SV**)NULL;
1269 Safefree(PL_bitcount);
1271 Safefree(PL_psig_pend);
1272 PL_psig_pend = (int*)NULL;
1275 PL_tainting = FALSE;
1276 PL_taint_warn = FALSE;
1277 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1280 DEBUG_P(debprofdump());
1282 #ifdef USE_REENTRANT_API
1283 Perl_reentrant_free(aTHX);
1288 while (PL_regmatch_slab) {
1289 regmatch_slab *s = PL_regmatch_slab;
1290 PL_regmatch_slab = PL_regmatch_slab->next;
1294 /* As the absolutely last thing, free the non-arena SV for mess() */
1297 /* we know that type == SVt_PVMG */
1299 /* it could have accumulated taint magic */
1302 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1303 moremagic = mg->mg_moremagic;
1304 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1306 Safefree(mg->mg_ptr);
1310 /* we know that type >= SVt_PV */
1311 SvPV_free(PL_mess_sv);
1312 Safefree(SvANY(PL_mess_sv));
1313 Safefree(PL_mess_sv);
1320 =for apidoc perl_free
1322 Releases a Perl interpreter. See L<perlembed>.
1332 if (PL_veto_cleanup)
1335 #ifdef PERL_TRACK_MEMPOOL
1338 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1339 * value as we're probably hunting memory leaks then
1341 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1342 if (!s || atoi(s) == 0) {
1343 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1344 thread at thread exit. */
1345 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1346 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1351 #if defined(WIN32) || defined(NETWARE)
1352 # if defined(PERL_IMPLICIT_SYS)
1355 void *host = nw_internal_host;
1357 void *host = w32_internal_host;
1359 PerlMem_free(aTHXx);
1361 nw_delete_internal_host(host);
1363 win32_delete_internal_host(host);
1367 PerlMem_free(aTHXx);
1370 PerlMem_free(aTHXx);
1374 #if defined(USE_ITHREADS)
1375 /* provide destructors to clean up the thread key when libperl is unloaded */
1376 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1378 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1379 #pragma fini "perl_fini"
1380 #elif defined(__sun) && !defined(__GNUC__)
1381 #pragma fini (perl_fini)
1385 #if defined(__GNUC__)
1386 __attribute__((destructor))
1391 if (PL_curinterp && !PL_veto_cleanup)
1396 #endif /* THREADS */
1399 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1402 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1403 PL_exitlist[PL_exitlistlen].fn = fn;
1404 PL_exitlist[PL_exitlistlen].ptr = ptr;
1408 #ifdef HAS_PROCSELFEXE
1409 /* This is a function so that we don't hold on to MAXPATHLEN
1410 bytes of stack longer than necessary
1413 S_procself_val(pTHX_ SV *sv, const char *arg0)
1415 char buf[MAXPATHLEN];
1416 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1418 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1419 includes a spurious NUL which will cause $^X to fail in system
1420 or backticks (this will prevent extensions from being built and
1421 many tests from working). readlink is not meant to add a NUL.
1422 Normal readlink works fine.
1424 if (len > 0 && buf[len-1] == '\0') {
1428 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1429 returning the text "unknown" from the readlink rather than the path
1430 to the executable (or returning an error from the readlink). Any valid
1431 path has a '/' in it somewhere, so use that to validate the result.
1432 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1434 if (len > 0 && memchr(buf, '/', len)) {
1435 sv_setpvn(sv,buf,len);
1441 #endif /* HAS_PROCSELFEXE */
1444 S_set_caret_X(pTHX) {
1446 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1448 #ifdef HAS_PROCSELFEXE
1449 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1452 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1454 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1461 =for apidoc perl_parse
1463 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1469 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1476 PERL_UNUSED_ARG(my_perl);
1478 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1481 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1482 setuid perl scripts securely.\n");
1483 #endif /* IAMSUID */
1486 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1487 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1488 * This MUST be done before any hash stores or fetches take place.
1489 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1490 * yourself, it is your responsibility to provide a good random seed!
1491 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1492 if (!PL_rehash_seed_set)
1493 PL_rehash_seed = get_hash_seed();
1495 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1497 if (s && (atoi(s) == 1))
1498 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1500 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1505 if (PL_origalen != 0) {
1506 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1509 /* Set PL_origalen be the sum of the contiguous argv[]
1510 * elements plus the size of the env in case that it is
1511 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1512 * as the maximum modifiable length of $0. In the worst case
1513 * the area we are able to modify is limited to the size of
1514 * the original argv[0]. (See below for 'contiguous', though.)
1516 const char *s = NULL;
1519 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1520 /* Do the mask check only if the args seem like aligned. */
1522 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1524 /* See if all the arguments are contiguous in memory. Note
1525 * that 'contiguous' is a loose term because some platforms
1526 * align the argv[] and the envp[]. If the arguments look
1527 * like non-aligned, assume that they are 'strictly' or
1528 * 'traditionally' contiguous. If the arguments look like
1529 * aligned, we just check that they are within aligned
1530 * PTRSIZE bytes. As long as no system has something bizarre
1531 * like the argv[] interleaved with some other data, we are
1532 * fine. (Did I just evoke Murphy's Law?) --jhi */
1533 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1535 for (i = 1; i < PL_origargc; i++) {
1536 if ((PL_origargv[i] == s + 1
1538 || PL_origargv[i] == s + 2
1543 (PL_origargv[i] > s &&
1545 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1556 #ifndef PERL_USE_SAFE_PUTENV
1557 /* Can we grab env area too to be used as the area for $0? */
1558 if (s && PL_origenviron && !PL_use_safe_putenv) {
1559 if ((PL_origenviron[0] == s + 1)
1562 (PL_origenviron[0] > s &&
1563 PL_origenviron[0] <=
1564 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1567 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1568 s = PL_origenviron[0];
1571 my_setenv("NoNe SuCh", NULL);
1572 /* Force copy of environment. */
1573 for (i = 1; PL_origenviron[i]; i++) {
1574 if (PL_origenviron[i] == s + 1
1577 (PL_origenviron[i] > s &&
1578 PL_origenviron[i] <=
1579 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1582 s = PL_origenviron[i];
1590 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1592 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1597 /* Come here if running an undumped a.out. */
1599 PL_origfilename = savepv(argv[0]);
1600 PL_do_undump = FALSE;
1601 cxstack_ix = -1; /* start label stack again */
1603 assert (!PL_tainted);
1605 S_set_caret_X(aTHX);
1607 init_postdump_symbols(argc,argv,env);
1612 op_free(PL_main_root);
1613 PL_main_root = NULL;
1615 PL_main_start = NULL;
1616 SvREFCNT_dec(PL_main_cv);
1620 oldscope = PL_scopestack_ix;
1621 PL_dowarn = G_WARN_OFF;
1626 parse_body(env,xsinit);
1628 call_list(oldscope, PL_unitcheckav);
1630 call_list(oldscope, PL_checkav);
1637 /* my_exit() was called */
1638 while (PL_scopestack_ix > oldscope)
1641 PL_curstash = PL_defstash;
1643 call_list(oldscope, PL_unitcheckav);
1645 call_list(oldscope, PL_checkav);
1649 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1658 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1661 int argc = PL_origargc;
1662 char **argv = PL_origargv;
1663 const char *scriptname = NULL;
1664 VOL bool dosearch = FALSE;
1665 const char *validarg = "";
1667 register char *s, c;
1668 const char *cddir = NULL;
1669 #ifdef USE_SITECUSTOMIZE
1670 bool minus_f = FALSE;
1673 sv_setpvn(PL_linestr,"",0);
1674 sv = newSVpvs(""); /* first used for -I flags */
1678 for (argc--,argv++; argc > 0; argc--,argv++) {
1679 if (argv[0][0] != '-' || !argv[0][1])
1683 validarg = " PHOOEY ";
1687 * Can we rely on the kernel to start scripts with argv[1] set to
1688 * contain all #! line switches (the whole line)? (argv[0] is set to
1689 * the interpreter name, argv[2] to the script name; argv[3] and
1690 * above may contain other arguments.)
1697 #ifndef PERL_STRICT_CR
1722 if ((s = moreswitches(s)))
1727 CHECK_MALLOC_TOO_LATE_FOR('t');
1728 if( !PL_tainting ) {
1729 PL_taint_warn = TRUE;
1735 CHECK_MALLOC_TOO_LATE_FOR('T');
1737 PL_taint_warn = FALSE;
1745 #ifdef MACOS_TRADITIONAL
1746 /* ignore -e for Dev:Pseudo argument */
1747 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1750 forbid_setid('e', -1);
1752 PL_e_script = newSVpvs("");
1753 filter_add(read_e_script, NULL);
1756 sv_catpv(PL_e_script, s);
1758 sv_catpv(PL_e_script, argv[1]);
1762 Perl_croak(aTHX_ "No code specified for -%c", c);
1763 sv_catpvs(PL_e_script, "\n");
1767 #ifdef USE_SITECUSTOMIZE
1773 case 'I': /* -I handled both here and in moreswitches() */
1774 forbid_setid('I', -1);
1775 if (!*++s && (s=argv[1]) != NULL) {
1779 STRLEN len = strlen(s);
1780 const char * const p = savepvn(s, len);
1781 incpush(p, TRUE, TRUE, FALSE, FALSE);
1782 sv_catpvs(sv, "-I");
1783 sv_catpvn(sv, p, len);
1788 Perl_croak(aTHX_ "No directory specified for -I");
1791 forbid_setid('P', -1);
1792 PL_preprocess = TRUE;
1796 forbid_setid('S', -1);
1804 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1808 opts_prog = newSVpvs("print Config::myconfig(),");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1812 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1814 opts = SvCUR(opts_prog);
1816 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1820 # ifdef DEBUG_LEAKING_SCALARS
1821 " DEBUG_LEAKING_SCALARS"
1823 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1824 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1826 # ifdef FAKE_THREADS
1829 # ifdef MULTIPLICITY
1838 # ifdef PERL_DONT_CREATE_GVSV
1839 " PERL_DONT_CREATE_GVSV"
1841 # ifdef PERL_GLOBAL_STRUCT
1842 " PERL_GLOBAL_STRUCT"
1844 # ifdef PERL_IMPLICIT_CONTEXT
1845 " PERL_IMPLICIT_CONTEXT"
1847 # ifdef PERL_IMPLICIT_SYS
1848 " PERL_IMPLICIT_SYS"
1853 # ifdef PERL_MALLOC_WRAP
1856 # ifdef PERL_MEM_LOG
1859 # ifdef PERL_MEM_LOG_ENV
1862 # ifdef PERL_MEM_LOG_ENV_FD
1863 " PERL_MEM_LOG_ENV_FD"
1865 # ifdef PERL_MEM_LOG_STDERR
1866 " PERL_MEM_LOG_STDERR"
1868 # ifdef PERL_MEM_LOG_TIMESTAMP
1869 " PERL_MEM_LOG_TIMESTAMP"
1871 # ifdef PERL_NEED_APPCTX
1874 # ifdef PERL_NEED_TIMESBASE
1875 " PERL_NEED_TIMESBASE"
1877 # ifdef PERL_OLD_COPY_ON_WRITE
1878 " PERL_OLD_COPY_ON_WRITE"
1883 # ifdef PERL_TRACK_MEMPOOL
1884 " PERL_TRACK_MEMPOOL"
1886 # ifdef PERL_USE_SAFE_PUTENV
1887 " PERL_USE_SAFE_PUTENV"
1889 # ifdef PERL_USES_PL_PIDSTATUS
1890 " PERL_USES_PL_PIDSTATUS"
1892 # ifdef PL_OP_SLAB_ALLOC
1895 # ifdef THREADS_HAVE_PIDS
1896 " THREADS_HAVE_PIDS"
1898 # ifdef USE_64_BIT_ALL
1901 # ifdef USE_64_BIT_INT
1904 # ifdef USE_ITHREADS
1907 # ifdef USE_LARGE_FILES
1910 # ifdef USE_LONG_DOUBLE
1916 # ifdef USE_REENTRANT_API
1917 " USE_REENTRANT_API"
1922 # ifdef USE_SITECUSTOMIZE
1923 " USE_SITECUSTOMIZE"
1930 while (SvCUR(opts_prog) > opts+76) {
1931 /* find last space after "options: " and before col 76
1935 char * const pv = SvPV_nolen(opts_prog);
1936 const char c = pv[opts+76];
1938 space = strrchr(pv+opts+26, ' ');
1940 if (!space) break; /* "Can't happen" */
1942 /* break the line before that space */
1945 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1946 STR_WITH_LEN("\\n "));
1949 sv_catpvs(opts_prog,"\\n\",");
1951 #if defined(LOCAL_PATCH_COUNT)
1952 if (LOCAL_PATCH_COUNT > 0) {
1954 sv_catpvs(opts_prog,
1955 "\" Locally applied patches:\\n\",");
1956 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1957 if (PL_localpatches[i])
1958 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1959 0, PL_localpatches[i], 0);
1963 Perl_sv_catpvf(aTHX_ opts_prog,
1964 "\" Built under %s\\n\"",OSNAME);
1967 Perl_sv_catpvf(aTHX_ opts_prog,
1968 ",\" Compiled at %s %s\\n\"",__DATE__,
1971 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1975 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1976 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1977 "sort grep {/^PERL/} keys %ENV; ");
1979 sv_catpvs(opts_prog,
1980 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1982 sv_catpvs(opts_prog,
1983 "print \" \\%ENV:\\n @env\\n\" if @env;"
1984 "print \" \\@INC:\\n @INC\\n\";");
1988 opts_prog = Perl_newSVpvf(aTHX_
1989 "Config::config_vars(qw%c%s%c)",
1993 av_push(PL_preambleav, opts_prog);
1994 /* don't look for script or read stdin */
1995 scriptname = BIT_BUCKET;
1999 PL_doextract = TRUE;
2007 if (!*++s || isSPACE(*s)) {
2011 /* catch use of gnu style long options */
2012 if (strEQ(s, "version")) {
2016 if (strEQ(s, "help")) {
2023 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2029 #ifndef SECURE_INTERNAL_GETENV
2032 (s = PerlEnv_getenv("PERL5OPT")))
2034 const char *popt = s;
2037 if (*s == '-' && *(s+1) == 'T') {
2038 CHECK_MALLOC_TOO_LATE_FOR('T');
2040 PL_taint_warn = FALSE;
2043 char *popt_copy = NULL;
2056 if (!strchr("CDIMUdmtwA", *s))
2057 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2061 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2062 s = popt_copy + (s - popt);
2063 d = popt_copy + (d - popt);
2070 if( !PL_tainting ) {
2071 PL_taint_warn = TRUE;
2081 #ifdef USE_SITECUSTOMIZE
2083 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2084 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2089 scriptname = argv[0];
2092 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2094 else if (scriptname == NULL) {
2096 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2102 /* Set $^X early so that it can be used for relocatable paths in @INC */
2103 assert (!PL_tainted);
2105 S_set_caret_X(aTHX);
2112 = open_script(scriptname, dosearch, sv, &suidscript);
2114 validate_suid(validarg, scriptname, fdscript, suidscript);
2117 # if defined(SIGCHLD) || defined(SIGCLD)
2120 # define SIGCHLD SIGCLD
2122 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2123 if (sigstate == (Sighandler_t) SIG_IGN) {
2124 if (ckWARN(WARN_SIGNAL))
2125 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2126 "Can't ignore signal CHLD, forcing to default");
2127 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2134 #ifdef MACOS_TRADITIONAL
2135 || gMacPerl_AlwaysExtract
2139 /* This will croak if suidscript is >= 0, as -x cannot be used with
2141 forbid_setid('x', suidscript);
2142 /* Hence you can't get here if suidscript >= 0 */
2145 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2146 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2150 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2151 CvUNIQUE_on(PL_compcv);
2153 CvPADLIST(PL_compcv) = pad_new(0);
2156 boot_core_UNIVERSAL();
2157 boot_core_xsutils();
2160 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2162 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2168 # ifdef HAS_SOCKS5_INIT
2169 socks5_init(argv[0]);
2175 init_predump_symbols();
2176 /* init_postdump_symbols not currently designed to be called */
2177 /* more than once (ENV isn't cleared first, for example) */
2178 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2180 init_postdump_symbols(argc,argv,env);
2182 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2183 * or explicitly in some platforms.
2184 * locale.c:Perl_init_i18nl10n() if the environment
2185 * look like the user wants to use UTF-8. */
2186 #if defined(__SYMBIAN32__)
2187 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2190 /* Requires init_predump_symbols(). */
2191 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2196 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2197 * and the default open disciplines. */
2198 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2199 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2201 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2202 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2203 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2205 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2206 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2207 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2211 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2213 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2214 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2217 sv_setpvn(sv, ":utf8\0:utf8", 11);
2219 sv_setpvn(sv, ":utf8\0", 6);
2222 sv_setpvn(sv, "\0:utf8", 6);
2228 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2229 if (strEQ(s, "unsafe"))
2230 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2231 else if (strEQ(s, "safe"))
2232 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2234 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2238 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2242 PL_xmlfp = PerlIO_stdout();
2244 PL_xmlfp = PerlIO_open(s, "w");
2246 Perl_croak(aTHX_ "Can't open %s", s);
2248 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2250 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2251 PL_madskills = atoi(s);
2252 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2258 /* now parse the script */
2260 SETERRNO(0,SS_NORMAL);
2262 #ifdef MACOS_TRADITIONAL
2263 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2265 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2267 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2268 MacPerl_MPWFileName(PL_origfilename));
2272 if (yyparse() || PL_error_count) {
2274 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2276 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2281 CopLINE_set(PL_curcop, 0);
2282 PL_curstash = PL_defstash;
2283 PL_preprocess = FALSE;
2285 SvREFCNT_dec(PL_e_script);
2293 SAVECOPFILE(PL_curcop);
2294 SAVECOPLINE(PL_curcop);
2295 gv_check(PL_defstash);
2302 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2303 dump_mstats("after compilation:");
2312 =for apidoc perl_run
2314 Tells a Perl interpreter to run. See L<perlembed>.
2327 PERL_UNUSED_ARG(my_perl);
2329 oldscope = PL_scopestack_ix;
2337 cxstack_ix = -1; /* start context stack again */
2339 case 0: /* normal completion */
2343 case 2: /* my_exit() */
2344 while (PL_scopestack_ix > oldscope)
2347 PL_curstash = PL_defstash;
2348 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2349 PL_endav && !PL_minus_c)
2350 call_list(oldscope, PL_endav);
2352 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2353 dump_mstats("after execution: ");
2359 POPSTACK_TO(PL_mainstack);
2362 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2374 S_run_body(pTHX_ I32 oldscope)
2377 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2378 PL_sawampersand ? "Enabling" : "Omitting"));
2380 if (!PL_restartop) {
2384 exit(0); /* less likely to core dump than my_exit(0) */
2387 DEBUG_x(dump_all());
2390 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2392 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2396 #ifdef MACOS_TRADITIONAL
2397 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2398 (gMacPerl_ErrorFormat ? "# " : ""),
2399 MacPerl_MPWFileName(PL_origfilename));
2401 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2405 if (PERLDB_SINGLE && PL_DBsingle)
2406 sv_setiv(PL_DBsingle, 1);
2408 call_list(oldscope, PL_initav);
2414 PL_op = PL_restartop;
2418 else if (PL_main_start) {
2419 CvDEPTH(PL_main_cv) = 1;
2420 PL_op = PL_main_start;
2428 =head1 SV Manipulation Functions
2430 =for apidoc p||get_sv
2432 Returns the SV of the specified Perl scalar. If C<create> is set and the
2433 Perl variable does not exist then it will be created. If C<create> is not
2434 set and the variable does not exist then NULL is returned.
2440 Perl_get_sv(pTHX_ const char *name, I32 create)
2443 gv = gv_fetchpv(name, create, SVt_PV);
2450 =head1 Array Manipulation Functions
2452 =for apidoc p||get_av
2454 Returns the AV of the specified Perl array. If C<create> is set and the
2455 Perl variable does not exist then it will be created. If C<create> is not
2456 set and the variable does not exist then NULL is returned.
2462 Perl_get_av(pTHX_ const char *name, I32 create)
2464 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2473 =head1 Hash Manipulation Functions
2475 =for apidoc p||get_hv
2477 Returns the HV of the specified Perl hash. If C<create> is set and the
2478 Perl variable does not exist then it will be created. If C<create> is not
2479 set and the variable does not exist then NULL is returned.
2485 Perl_get_hv(pTHX_ const char *name, I32 create)
2487 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2496 =head1 CV Manipulation Functions
2498 =for apidoc p||get_cvn_flags
2500 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2501 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2502 exist then it will be declared (which has the same effect as saying
2503 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2504 then NULL is returned.
2506 =for apidoc p||get_cv
2508 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2514 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2516 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2517 /* XXX this is probably not what they think they're getting.
2518 * It has the same effect as "sub name;", i.e. just a forward
2520 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2521 SV *const sv = newSVpvn(name,len);
2522 SvFLAGS(sv) |= flags & SVf_UTF8;
2523 return newSUB(start_subparse(FALSE, 0),
2524 newSVOP(OP_CONST, 0, sv),
2533 Perl_get_cv(pTHX_ const char *name, I32 flags)
2535 return get_cvn_flags(name, strlen(name), flags);
2538 /* Be sure to refetch the stack pointer after calling these routines. */
2542 =head1 Callback Functions
2544 =for apidoc p||call_argv
2546 Performs a callback to the specified Perl sub. See L<perlcall>.
2552 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2554 /* See G_* flags in cop.h */
2555 /* null terminated arg list */
2563 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2568 return call_pv(sub_name, flags);
2572 =for apidoc p||call_pv
2574 Performs a callback to the specified Perl sub. See L<perlcall>.
2580 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2581 /* name of the subroutine */
2582 /* See G_* flags in cop.h */
2584 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2588 =for apidoc p||call_method
2590 Performs a callback to the specified Perl method. The blessed object must
2591 be on the stack. See L<perlcall>.
2597 Perl_call_method(pTHX_ const char *methname, I32 flags)
2598 /* name of the subroutine */
2599 /* See G_* flags in cop.h */
2601 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2604 /* May be called with any of a CV, a GV, or an SV containing the name. */
2606 =for apidoc p||call_sv
2608 Performs a callback to the Perl sub whose name is in the SV. See
2615 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2616 /* See G_* flags in cop.h */
2619 LOGOP myop; /* fake syntax tree node */
2624 bool oldcatch = CATCH_GET;
2626 OP* const oldop = PL_op;
2629 if (flags & G_DISCARD) {
2634 Zero(&myop, 1, LOGOP);
2635 myop.op_next = NULL;
2636 if (!(flags & G_NOARGS))
2637 myop.op_flags |= OPf_STACKED;
2638 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2639 (flags & G_ARRAY) ? OPf_WANT_LIST :
2644 EXTEND(PL_stack_sp, 1);
2645 *++PL_stack_sp = sv;
2647 oldscope = PL_scopestack_ix;
2649 if (PERLDB_SUB && PL_curstash != PL_debstash
2650 /* Handle first BEGIN of -d. */
2651 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2652 /* Try harder, since this may have been a sighandler, thus
2653 * curstash may be meaningless. */
2654 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2655 && !(flags & G_NODEBUG))
2656 PL_op->op_private |= OPpENTERSUB_DB;
2658 if (flags & G_METHOD) {
2659 Zero(&method_op, 1, UNOP);
2660 method_op.op_next = PL_op;
2661 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2662 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2663 PL_op = (OP*)&method_op;
2666 if (!(flags & G_EVAL)) {
2668 CALL_BODY_SUB((OP*)&myop);
2669 retval = PL_stack_sp - (PL_stack_base + oldmark);
2670 CATCH_SET(oldcatch);
2673 myop.op_other = (OP*)&myop;
2675 create_eval_scope(flags|G_FAKINGEVAL);
2683 CALL_BODY_SUB((OP*)&myop);
2684 retval = PL_stack_sp - (PL_stack_base + oldmark);
2685 if (!(flags & G_KEEPERR))
2686 sv_setpvn(ERRSV,"",0);
2692 /* my_exit() was called */
2693 PL_curstash = PL_defstash;
2696 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2697 Perl_croak(aTHX_ "Callback called exit");
2702 PL_op = PL_restartop;
2706 PL_stack_sp = PL_stack_base + oldmark;
2707 if (flags & G_ARRAY)
2711 *++PL_stack_sp = &PL_sv_undef;
2716 if (PL_scopestack_ix > oldscope)
2717 delete_eval_scope();
2721 if (flags & G_DISCARD) {
2722 PL_stack_sp = PL_stack_base + oldmark;
2731 /* Eval a string. The G_EVAL flag is always assumed. */
2734 =for apidoc p||eval_sv
2736 Tells Perl to C<eval> the string in the SV.
2742 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2744 /* See G_* flags in cop.h */
2748 UNOP myop; /* fake syntax tree node */
2749 VOL I32 oldmark = SP - PL_stack_base;
2752 OP* const oldop = PL_op;
2755 if (flags & G_DISCARD) {
2762 Zero(PL_op, 1, UNOP);
2763 EXTEND(PL_stack_sp, 1);
2764 *++PL_stack_sp = sv;
2766 if (!(flags & G_NOARGS))
2767 myop.op_flags = OPf_STACKED;
2768 myop.op_next = NULL;
2769 myop.op_type = OP_ENTEREVAL;
2770 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2771 (flags & G_ARRAY) ? OPf_WANT_LIST :
2773 if (flags & G_KEEPERR)
2774 myop.op_flags |= OPf_SPECIAL;
2776 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2777 * before a PUSHEVAL, which corrupts the stack after a croak */
2778 TAINT_PROPER("eval_sv()");
2784 CALL_BODY_EVAL((OP*)&myop);
2785 retval = PL_stack_sp - (PL_stack_base + oldmark);
2786 if (!(flags & G_KEEPERR))
2787 sv_setpvn(ERRSV,"",0);
2793 /* my_exit() was called */
2794 PL_curstash = PL_defstash;
2797 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2798 Perl_croak(aTHX_ "Callback called exit");
2803 PL_op = PL_restartop;
2807 PL_stack_sp = PL_stack_base + oldmark;
2808 if (flags & G_ARRAY)
2812 *++PL_stack_sp = &PL_sv_undef;
2818 if (flags & G_DISCARD) {
2819 PL_stack_sp = PL_stack_base + oldmark;
2829 =for apidoc p||eval_pv
2831 Tells Perl to C<eval> the given string and return an SV* result.
2837 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2841 SV* sv = newSVpv(p, 0);
2843 eval_sv(sv, G_SCALAR);
2850 if (croak_on_error && SvTRUE(ERRSV)) {
2851 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2857 /* Require a module. */
2860 =head1 Embedding Functions
2862 =for apidoc p||require_pv
2864 Tells Perl to C<require> the file named by the string argument. It is
2865 analogous to the Perl code C<eval "require '$file'">. It's even
2866 implemented that way; consider using load_module instead.
2871 Perl_require_pv(pTHX_ const char *pv)
2876 PUSHSTACKi(PERLSI_REQUIRE);
2878 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2879 eval_sv(sv_2mortal(sv), G_DISCARD);
2885 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2887 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2890 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2894 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2896 /* This message really ought to be max 23 lines.
2897 * Removed -h because the user already knows that option. Others? */
2899 static const char * const usage_msg[] = {
2900 "-0[octal] specify record separator (\\0, if no argument)",
2901 "-A[mod][=pattern] activate all/given assertions",
2902 "-a autosplit mode with -n or -p (splits $_ into @F)",
2903 "-C[number/list] enables the listed Unicode features",
2904 "-c check syntax only (runs BEGIN and CHECK blocks)",
2905 "-d[:debugger] run program under debugger",
2906 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2907 "-e program one line of program (several -e's allowed, omit programfile)",
2908 "-E program like -e, but enables all optional features",
2909 "-f don't do $sitelib/sitecustomize.pl at startup",
2910 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2911 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2912 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2913 "-l[octal] enable line ending processing, specifies line terminator",
2914 "-[mM][-]module execute \"use/no module...\" before executing program",
2915 "-n assume \"while (<>) { ... }\" loop around program",
2916 "-p assume loop like -n but print line also, like sed",
2917 "-P run program through C preprocessor before compilation",
2918 "-s enable rudimentary parsing for switches after programfile",
2919 "-S look for programfile using PATH environment variable",
2920 "-t enable tainting warnings",
2921 "-T enable tainting checks",
2922 "-u dump core after parsing program",
2923 "-U allow unsafe operations",
2924 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2925 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2926 "-w enable many useful warnings (RECOMMENDED)",
2927 "-W enable all warnings",
2928 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2929 "-X disable all warnings",
2933 const char * const *p = usage_msg;
2935 PerlIO_printf(PerlIO_stdout(),
2936 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2939 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2942 /* convert a string of -D options (or digits) into an int.
2943 * sets *s to point to the char after the options */
2947 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2949 static const char * const usage_msgd[] = {
2950 " Debugging flag values: (see also -d)",
2951 " p Tokenizing and parsing (with v, displays parse stack)",
2952 " s Stack snapshots (with v, displays all stacks)",
2953 " l Context (loop) stack processing",
2954 " t Trace execution",
2955 " o Method and overloading resolution",
2956 " c String/numeric conversions",
2957 " P Print profiling info, preprocessor command for -P, source file input state",
2958 " m Memory allocation",
2959 " f Format processing",
2960 " r Regular expression parsing and execution",
2961 " x Syntax tree dump",
2962 " u Tainting checks",
2963 " H Hash dump -- usurps values()",
2964 " X Scratchpad allocation",
2966 " S Thread synchronization",
2968 " R Include reference counts of dumped variables (eg when using -Ds)",
2969 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2970 " v Verbose: use in conjunction with other flags",
2972 " A Consistency checks on internal structures",
2973 " q quiet - currently only suppresses the 'EXECUTING' message",
2978 /* if adding extra options, remember to update DEBUG_MASK */
2979 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2981 for (; isALNUM(**s); (*s)++) {
2982 const char * const d = strchr(debopts,**s);
2984 i |= 1 << (d - debopts);
2985 else if (ckWARN_d(WARN_DEBUGGING))
2986 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2987 "invalid option -D%c, use -D'' to see choices\n", **s);
2990 else if (isDIGIT(**s)) {
2992 for (; isALNUM(**s); (*s)++) ;
2994 else if (givehelp) {
2995 const char *const *p = usage_msgd;
2996 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2999 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3000 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3001 "-Dp not implemented on this platform\n");
3007 /* This routine handles any switches that can be given during run */
3010 Perl_moreswitches(pTHX_ char *s)
3021 SvREFCNT_dec(PL_rs);
3022 if (s[1] == 'x' && s[2]) {
3023 const char *e = s+=2;
3029 flags = PERL_SCAN_SILENT_ILLDIGIT;
3030 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3031 if (s + numlen < e) {
3032 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3036 PL_rs = newSVpvs("");
3037 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3038 tmps = (U8*)SvPVX(PL_rs);
3039 uvchr_to_utf8(tmps, rschar);
3040 SvCUR_set(PL_rs, UNISKIP(rschar));
3045 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3046 if (rschar & ~((U8)~0))
3047 PL_rs = &PL_sv_undef;
3048 else if (!rschar && numlen >= 2)
3049 PL_rs = newSVpvs("");
3051 char ch = (char)rschar;
3052 PL_rs = newSVpvn(&ch, 1);
3055 sv_setsv(get_sv("/", TRUE), PL_rs);
3060 PL_unicode = parse_unicode_opts( (const char **)&s );
3061 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3067 while (*s && !isSPACE(*s)) ++s;
3068 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3079 forbid_setid('d', -1);
3082 /* -dt indicates to the debugger that threads will be used */
3083 if (*s == 't' && !isALNUM(s[1])) {
3085 my_setenv("PERL5DB_THREADED", "1");
3088 /* The following permits -d:Mod to accepts arguments following an =
3089 in the fashion that -MSome::Mod does. */
3090 if (*s == ':' || *s == '=') {
3092 SV * const sv = newSVpvs("use Devel::");
3094 /* We now allow -d:Module=Foo,Bar */
3095 while(isALNUM(*s) || *s==':') ++s;
3097 sv_catpv(sv, start);
3099 sv_catpvn(sv, start, s-start);
3100 /* Don't use NUL as q// delimiter here, this string goes in the
3102 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3105 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3108 PL_perldb = PERLDB_ALL;
3115 forbid_setid('D', -1);
3117 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3118 #else /* !DEBUGGING */
3119 if (ckWARN_d(WARN_DEBUGGING))
3120 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3121 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3122 for (s++; isALNUM(*s); s++) ;
3127 usage(PL_origargv[0]);
3130 Safefree(PL_inplace);
3131 #if defined(__CYGWIN__) /* do backup extension automagically */
3132 if (*(s+1) == '\0') {
3133 PL_inplace = savepvs(".bak");
3136 #endif /* __CYGWIN__ */
3138 const char * const start = ++s;
3139 while (*s && !isSPACE(*s))
3142 PL_inplace = savepvn(start, s - start);
3146 if (*s == '-') /* Additional switches on #! line. */
3150 case 'I': /* -I handled both here and in parse_body() */
3151 forbid_setid('I', -1);
3153 while (*s && isSPACE(*s))
3158 /* ignore trailing spaces (possibly followed by other switches) */
3160 for (e = p; *e && !isSPACE(*e); e++) ;
3164 } while (*p && *p != '-');
3165 e = savepvn(s, e-s);
3166 incpush(e, TRUE, TRUE, FALSE, FALSE);
3173 Perl_croak(aTHX_ "No directory specified for -I");
3179 SvREFCNT_dec(PL_ors_sv);
3185 PL_ors_sv = newSVpvs("\n");
3186 numlen = 3 + (*s == '0');
3187 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3191 if (RsPARA(PL_rs)) {
3192 PL_ors_sv = newSVpvs("\n\n");
3195 PL_ors_sv = newSVsv(PL_rs);
3200 forbid_setid('A', -1);
3203 char * const start = s;
3204 SV * const sv = newSVpvs("use assertions::activate");
3205 while(isALNUM(*s) || *s == ':') ++s;
3207 sv_catpvs(sv, "::");
3208 sv_catpvn(sv, start, s-start);
3211 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3214 else if (*s != '\0') {
3215 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3217 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3221 forbid_setid('M', -1); /* XXX ? */
3224 forbid_setid('m', -1); /* XXX ? */
3228 const char *use = "use ";
3229 /* -M-foo == 'no foo' */
3230 /* Leading space on " no " is deliberate, to make both
3231 possibilities the same length. */
3232 if (*s == '-') { use = " no "; ++s; }
3233 sv = newSVpvn(use,4);
3235 /* We allow -M'Module qw(Foo Bar)' */
3236 while(isALNUM(*s) || *s==':') ++s;
3238 sv_catpv(sv, start);
3239 if (*(start-1) == 'm') {
3241 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3242 sv_catpvs( sv, " ()");
3246 Perl_croak(aTHX_ "Module name required with -%c option",
3248 sv_catpvn(sv, start, s-start);
3249 sv_catpvs(sv, " split(/,/,q");
3250 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3252 sv_catpvs(sv, "\0)");
3255 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3258 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3269 forbid_setid('s', -1);
3270 PL_doswitches = TRUE;
3284 #ifdef MACOS_TRADITIONAL
3285 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3287 PL_do_undump = TRUE;
3295 if (!sv_derived_from(PL_patchlevel, "version"))
3296 upg_version(PL_patchlevel, TRUE);
3298 PerlIO_printf(PerlIO_stdout(),
3299 Perl_form(aTHX_ "\nThis is perl, %"SVf
3300 #ifdef PERL_PATCHNUM
3301 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3304 SVfARG(vstringify(PL_patchlevel)),
3307 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3308 PerlIO_printf(PerlIO_stdout(),
3309 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3310 SVfARG(vstringify(PL_patchlevel))));
3311 PerlIO_printf(PerlIO_stdout(),
3312 Perl_form(aTHX_ " built under %s at %s %s\n",
3313 OSNAME, __DATE__, __TIME__));
3314 PerlIO_printf(PerlIO_stdout(),
3315 Perl_form(aTHX_ " OS Specific Release: %s\n",
3319 #if defined(LOCAL_PATCH_COUNT)
3320 if (LOCAL_PATCH_COUNT > 0)
3321 PerlIO_printf(PerlIO_stdout(),
3322 "\n(with %d registered patch%s, "
3323 "see perl -V for more detail)",
3325 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "\n\nCopyright 1987-2007, Larry Wall\n");
3330 #ifdef MACOS_TRADITIONAL
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3333 "maintained by Chris Nandor\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3342 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3347 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "atariST series port, ++jrb bammi@cadence.com\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3366 PerlIO_printf(PerlIO_stdout(),
3367 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3370 PerlIO_printf(PerlIO_stdout(),
3371 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3374 PerlIO_printf(PerlIO_stdout(),
3375 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3378 PerlIO_printf(PerlIO_stdout(),
3379 "MiNT port by Guido Flohr, 1997-1999\n");
3382 PerlIO_printf(PerlIO_stdout(),
3383 "EPOC port by Olaf Flebbe, 1999-2002\n");
3386 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3387 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3390 #ifdef __SYMBIAN32__
3391 PerlIO_printf(PerlIO_stdout(),
3392 "Symbian port by Nokia, 2004-2005\n");
3394 #ifdef BINARY_BUILD_NOTICE
3395 BINARY_BUILD_NOTICE;
3397 PerlIO_printf(PerlIO_stdout(),
3399 Perl may be copied only under the terms of either the Artistic License or the\n\
3400 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3401 Complete documentation for Perl, including FAQ lists, should be found on\n\
3402 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3403 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3406 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3407 PL_dowarn |= G_WARN_ON;
3412 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3413 if (!specialWARN(PL_compiling.cop_warnings))
3414 PerlMemShared_free(PL_compiling.cop_warnings);
3415 PL_compiling.cop_warnings = pWARN_ALL ;
3419 PL_dowarn = G_WARN_ALL_OFF;
3420 if (!specialWARN(PL_compiling.cop_warnings))
3421 PerlMemShared_free(PL_compiling.cop_warnings);
3422 PL_compiling.cop_warnings = pWARN_NONE ;
3427 if (s[1] == '-') /* Additional switches on #! line. */
3432 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3438 #ifdef ALTERNATE_SHEBANG
3439 case 'S': /* OS/2 needs -S on "extproc" line. */
3447 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3452 /* compliments of Tom Christiansen */
3454 /* unexec() can be found in the Gnu emacs distribution */
3455 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3458 Perl_my_unexec(pTHX)
3460 PERL_UNUSED_CONTEXT;
3462 SV * prog = newSVpv(BIN_EXP, 0);
3463 SV * file = newSVpv(PL_origfilename, 0);
3467 sv_catpvs(prog, "/perl");
3468 sv_catpvs(file, ".perldump");
3470 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3471 /* unexec prints msg to stderr in case of failure */
3472 PerlProc_exit(status);
3475 # include <lib$routines.h>
3476 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3477 # elif defined(WIN32) || defined(__CYGWIN__)
3478 Perl_croak(aTHX_ "dump is not supported");
3480 ABORT(); /* for use with undump */
3485 /* initialize curinterp */
3491 # define PERLVAR(var,type)
3492 # define PERLVARA(var,n,type)
3493 # if defined(PERL_IMPLICIT_CONTEXT)
3494 # define PERLVARI(var,type,init) aTHX->var = init;
3495 # define PERLVARIC(var,type,init) aTHX->var = init;
3497 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3498 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3500 # include "intrpvar.h"
3501 # include "thrdvar.h"
3507 # define PERLVAR(var,type)
3508 # define PERLVARA(var,n,type)
3509 # define PERLVARI(var,type,init) PL_##var = init;
3510 # define PERLVARIC(var,type,init) PL_##var = init;
3511 # include "intrpvar.h"
3512 # include "thrdvar.h"
3519 /* As these are inside a structure, PERLVARI isn't capable of initialising
3521 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3522 PL_reg_poscache = PL_reg_starttry = NULL;
3526 S_init_main_stash(pTHX)
3531 PL_curstash = PL_defstash = newHV();
3532 /* We know that the string "main" will be in the global shared string
3533 table, so it's a small saving to use it rather than allocate another
3535 PL_curstname = newSVpvs_share("main");
3536 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3537 /* If we hadn't caused another reference to "main" to be in the shared
3538 string table above, then it would be worth reordering these two,
3539 because otherwise all we do is delete "main" from it as a consequence
3540 of the SvREFCNT_dec, only to add it again with hv_name_set */
3541 SvREFCNT_dec(GvHV(gv));
3542 hv_name_set(PL_defstash, "main", 4, 0);
3543 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3545 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3547 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3548 GvMULTI_on(PL_incgv);
3549 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3550 GvMULTI_on(PL_hintgv);
3551 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3552 SvREFCNT_inc_simple(PL_defgv);
3553 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3554 SvREFCNT_inc_simple(PL_errgv);
3555 GvMULTI_on(PL_errgv);
3556 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3557 GvMULTI_on(PL_replgv);
3558 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3559 #ifdef PERL_DONT_CREATE_GVSV
3562 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3563 sv_setpvn(ERRSV, "", 0);
3564 PL_curstash = PL_defstash;
3565 CopSTASH_set(&PL_compiling, PL_defstash);
3566 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3567 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3569 /* We must init $/ before switches are processed. */
3570 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3574 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3580 const char *cpp_discard_flag;
3589 PL_origfilename = savepvs("-e");
3592 /* if find_script() returns, it returns a malloc()-ed value */
3593 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3595 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3596 const char *s = scriptname + 8;
3602 * Tell apart "normal" usage of fdscript, e.g.
3603 * with bash on FreeBSD:
3604 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3605 * from usage in suidperl.
3606 * Does any "normal" usage leave garbage after the number???
3607 * Is it a mistake to use a similar /dev/fd/ construct for
3612 * Be supersafe and do some sanity-checks.
3613 * Still, can we be sure we got the right thing?
3616 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3619 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3621 scriptname = savepv(s + 1);
3622 Safefree(PL_origfilename);
3623 PL_origfilename = (char *)scriptname;
3628 CopFILE_free(PL_curcop);
3629 CopFILE_set(PL_curcop, PL_origfilename);
3630 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3631 scriptname = (char *)"";
3632 if (fdscript >= 0) {
3633 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3634 # if defined(HAS_FCNTL) && defined(F_SETFD)
3636 /* ensure close-on-exec */
3637 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3642 Perl_croak(aTHX_ "sperl needs fd script\n"
3643 "You should not call sperl directly; do you need to "
3644 "change a #! line\nfrom sperl to perl?\n");
3647 * Do not open (or do other fancy stuff) while setuid.
3648 * Perl does the open, and hands script to suidperl on a fd;
3649 * suidperl only does some checks, sets up UIDs and re-execs
3650 * perl with that fd as it has always done.
3653 if (*suidscript != 1) {
3654 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3657 else if (PL_preprocess) {
3658 const char * const cpp_cfg = CPPSTDIN;
3659 SV * const cpp = newSVpvs("");
3660 SV * const cmd = newSV(0);
3662 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3663 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3664 if (strEQ(cpp_cfg, "cppstdin"))
3665 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3666 sv_catpv(cpp, cpp_cfg);
3669 sv_catpvs(sv, "-I");
3670 sv_catpv(sv,PRIVLIB_EXP);
3673 DEBUG_P(PerlIO_printf(Perl_debug_log,
3674 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3675 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3678 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3685 cpp_discard_flag = "";
3687 cpp_discard_flag = "-C";
3691 perl = os2_execname(aTHX);
3693 perl = PL_origargv[0];
3697 /* This strips off Perl comments which might interfere with
3698 the C pre-processor, including #!. #line directives are
3699 deliberately stripped to avoid confusion with Perl's version
3700 of #line. FWP played some golf with it so it will fit
3701 into VMS's 255 character buffer.
3704 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3706 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3708 Perl_sv_setpvf(aTHX_ cmd, "\
3709 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3710 perl, quote, code, quote, scriptname, SVfARG(cpp),
3711 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3713 PL_doextract = FALSE;
3715 DEBUG_P(PerlIO_printf(Perl_debug_log,
3716 "PL_preprocess: cmd=\"%s\"\n",
3719 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3723 else if (!*scriptname) {
3724 forbid_setid(0, *suidscript);
3725 PL_rsfp = PerlIO_stdin();
3728 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3729 # if defined(HAS_FCNTL) && defined(F_SETFD)
3731 /* ensure close-on-exec */
3732 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3735 #endif /* IAMSUID */
3737 /* PSz 16 Sep 03 Keep neat error message */
3739 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3741 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3742 CopFILE(PL_curcop), Strerror(errno));
3748 * I_SYSSTATVFS HAS_FSTATVFS
3750 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3751 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3752 * here so that metaconfig picks them up. */
3756 S_fd_on_nosuid_fs(pTHX_ int fd)
3759 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3760 * but is needed also on machines without setreuid.
3761 * Seems safe enough to run as root.
3763 int check_okay = 0; /* able to do all the required sys/libcalls */
3764 int on_nosuid = 0; /* the fd is on a nosuid fs */
3766 * Need to check noexec also: nosuid might not be set, the average
3767 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3769 int on_noexec = 0; /* the fd is on a noexec fs */
3772 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3773 * fstatvfs() is UNIX98.
3774 * fstatfs() is 4.3 BSD.
3775 * ustat()+getmnt() is pre-4.3 BSD.
3776 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3777 * an irrelevant filesystem while trying to reach the right one.
3780 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3782 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3783 defined(HAS_FSTATVFS)
3784 # define FD_ON_NOSUID_CHECK_OKAY
3785 struct statvfs stfs;
3787 check_okay = fstatvfs(fd, &stfs) == 0;
3788 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3790 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3791 on platforms where it is present. */
3792 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3794 # endif /* fstatvfs */
3796 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3797 defined(PERL_MOUNT_NOSUID) && \
3798 defined(PERL_MOUNT_NOEXEC) && \
3799 defined(HAS_FSTATFS) && \
3800 defined(HAS_STRUCT_STATFS) && \
3801 defined(HAS_STRUCT_STATFS_F_FLAGS)
3802 # define FD_ON_NOSUID_CHECK_OKAY
3805 check_okay = fstatfs(fd, &stfs) == 0;
3806 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3807 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3808 # endif /* fstatfs */
3810 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3811 defined(PERL_MOUNT_NOSUID) && \
3812 defined(PERL_MOUNT_NOEXEC) && \
3813 defined(HAS_FSTAT) && \
3814 defined(HAS_USTAT) && \
3815 defined(HAS_GETMNT) && \
3816 defined(HAS_STRUCT_FS_DATA) && \
3818 # define FD_ON_NOSUID_CHECK_OKAY
3821 if (fstat(fd, &fdst) == 0) {
3823 if (ustat(fdst.st_dev, &us) == 0) {
3825 /* NOSTAT_ONE here because we're not examining fields which
3826 * vary between that case and STAT_ONE. */
3827 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3828 size_t cmplen = sizeof(us.f_fname);
3829 if (sizeof(fsd.fd_req.path) < cmplen)
3830 cmplen = sizeof(fsd.fd_req.path);
3831 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3832 fdst.st_dev == fsd.fd_req.dev) {
3834 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3835 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3840 # endif /* fstat+ustat+getmnt */
3842 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3843 defined(HAS_GETMNTENT) && \
3844 defined(HAS_HASMNTOPT) && \
3845 defined(MNTOPT_NOSUID) && \
3846 defined(MNTOPT_NOEXEC)
3847 # define FD_ON_NOSUID_CHECK_OKAY
3848 FILE *mtab = fopen("/etc/mtab", "r");
3849 struct mntent *entry;
3852 if (mtab && (fstat(fd, &stb) == 0)) {
3853 while (entry = getmntent(mtab)) {
3854 if (stat(entry->mnt_dir, &fsb) == 0
3855 && fsb.st_dev == stb.st_dev)
3857 /* found the filesystem */
3859 if (hasmntopt(entry, MNTOPT_NOSUID))
3861 if (hasmntopt(entry, MNTOPT_NOEXEC))
3864 } /* A single fs may well fail its stat(). */
3869 # endif /* getmntent+hasmntopt */
3872 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3874 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3876 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3877 return ((!check_okay) || on_nosuid || on_noexec);
3879 #endif /* IAMSUID */
3882 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3883 int fdscript, int suidscript)
3888 #endif /* IAMSUID */
3890 /* do we need to emulate setuid on scripts? */
3892 /* This code is for those BSD systems that have setuid #! scripts disabled
3893 * in the kernel because of a security problem. Merely defining DOSUID
3894 * in perl will not fix that problem, but if you have disabled setuid
3895 * scripts in the kernel, this will attempt to emulate setuid and setgid
3896 * on scripts that have those now-otherwise-useless bits set. The setuid
3897 * root version must be called suidperl or sperlN.NNN. If regular perl
3898 * discovers that it has opened a setuid script, it calls suidperl with
3899 * the same argv that it had. If suidperl finds that the script it has
3900 * just opened is NOT setuid root, it sets the effective uid back to the
3901 * uid. We don't just make perl setuid root because that loses the
3902 * effective uid we had before invoking perl, if it was different from the
3905 * Description/comments above do not match current workings:
3906 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3907 * suidperl called with script open and name changed to /dev/fd/N/X;
3908 * suidperl croaks if script is not setuid;
3909 * making perl setuid would be a huge security risk (and yes, that
3910 * would lose any euid we might have had).
3912 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3913 * be defined in suidperl only. suidperl must be setuid root. The
3914 * Configure script will set this up for you if you want it.
3920 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3921 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3922 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3924 const char *linestr;
3928 if (fdscript < 0 || suidscript != 1)
3929 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3931 * Since the script is opened by perl, not suidperl, some of these
3932 * checks are superfluous. Leaving them in probably does not lower
3936 * Do checks even for systems with no HAS_SETREUID.
3937 * We used to swap, then re-swap UIDs with
3939 if (setreuid(PL_euid,PL_uid) < 0
3940 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3941 Perl_croak(aTHX_ "Can't swap uid and euid");
3944 if (setreuid(PL_uid,PL_euid) < 0
3945 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3946 Perl_croak(aTHX_ "Can't reswap uid and euid");
3950 /* On this access check to make sure the directories are readable,
3951 * there is actually a small window that the user could use to make
3952 * filename point to an accessible directory. So there is a faint
3953 * chance that someone could execute a setuid script down in a
3954 * non-accessible directory. I don't know what to do about that.
3955 * But I don't think it's too important. The manual lies when
3956 * it says access() is useful in setuid programs.
3958 * So, access() is pretty useless... but not harmful... do anyway.
3960 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3961 Perl_croak(aTHX_ "Can't access() script\n");
3964 /* If we can swap euid and uid, then we can determine access rights
3965 * with a simple stat of the file, and then compare device and
3966 * inode to make sure we did stat() on the same file we opened.
3967 * Then we just have to make sure he or she can execute it.
3970 * As the script is opened by perl, not suidperl, we do not need to
3971 * care much about access rights.
3973 * The 'script changed' check is needed, or we can get lied to
3974 * about $0 with e.g.
3975 * suidperl /dev/fd/4//bin/x 4<setuidscript
3976 * Without HAS_SETREUID, is it safe to stat() as root?
3978 * Are there any operating systems that pass /dev/fd/xxx for setuid
3979 * scripts, as suggested/described in perlsec(1)? Surely they do not
3980 * pass the script name as we do, so the "script changed" test would
3981 * fail for them... but we never get here with
3982 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3984 * This is one place where we must "lie" about return status: not
3985 * say if the stat() failed. We are doing this as root, and could
3986 * be tricked into reporting existence or not of files that the
3987 * "plain" user cannot even see.
3991 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3992 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3993 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3994 Perl_croak(aTHX_ "Setuid script changed\n");
3998 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3999 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4002 * We used to do this check as the "plain" user (after swapping
4003 * UIDs). But the check for nosuid and noexec filesystem is needed,
4004 * and should be done even without HAS_SETREUID. (Maybe those
4005 * operating systems do not have such mount options anyway...)
4006 * Seems safe enough to do as root.
4008 #if !defined(NO_NOSUID_CHECK)
4009 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4010 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4013 #endif /* IAMSUID */
4015 if (!S_ISREG(PL_statbuf.st_mode)) {
4016 Perl_croak(aTHX_ "Setuid script not plain file\n");
4018 if (PL_statbuf.st_mode & S_IWOTH)
4019 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4020 PL_doswitches = FALSE; /* -s is insecure in suid */
4021 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4022 CopLINE_inc(PL_curcop);
4023 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4024 Perl_croak(aTHX_ "No #! line");
4025 linestr = SvPV_nolen_const(PL_linestr);
4026 /* required even on Sys V */
4027 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4028 Perl_croak(aTHX_ "No #! line");
4032 /* Sanity check on line length */
4033 s_end = s + strlen(s);
4034 if (s_end == s || (s_end - s) > 4000)
4035 Perl_croak(aTHX_ "Very long #! line");
4036 /* Allow more than a single space after #! */
4037 while (isSPACE(*s)) s++;
4038 /* Sanity check on buffer end */
4039 while ((*s) && !isSPACE(*s)) s++;
4040 for (s2 = s; (s2 > linestr &&
4041 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4042 || s2[-1] == '-')); s2--) ;
4043 /* Sanity check on buffer start */
4044 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4045 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4046 Perl_croak(aTHX_ "Not a perl script");
4047 while (*s == ' ' || *s == '\t') s++;
4049 * #! arg must be what we saw above. They can invoke it by
4050 * mentioning suidperl explicitly, but they may not add any strange
4051 * arguments beyond what #! says if they do invoke suidperl that way.
4054 * The way validarg was set up, we rely on the kernel to start
4055 * scripts with argv[1] set to contain all #! line switches (the
4059 * Check that we got all the arguments listed in the #! line (not
4060 * just that there are no extraneous arguments). Might not matter
4061 * much, as switches from #! line seem to be acted upon (also), and
4062 * so may be checked and trapped in perl. But, security checks must
4063 * be done in suidperl and not deferred to perl. Note that suidperl
4064 * does not get around to parsing (and checking) the switches on
4065 * the #! line (but execs perl sooner).
4066 * Allow (require) a trailing newline (which may be of two
4067 * characters on some architectures?) (but no other trailing
4070 len = strlen(validarg);
4071 if (strEQ(validarg," PHOOEY ") ||
4072 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4073 !((s_end - s) == len+1
4074 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4075 Perl_croak(aTHX_ "Args must match #! line");
4079 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4080 PL_euid == PL_statbuf.st_uid)
4082 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4083 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4084 #endif /* IAMSUID */
4087 PL_euid) { /* oops, we're not the setuid root perl */
4089 * When root runs a setuid script, we do not go through the same
4090 * steps of execing sperl and then perl with fd scripts, but
4091 * simply set up UIDs within the same perl invocation; so do
4092 * not have the same checks (on options, whatever) that we have
4093 * for plain users. No problem really: would have to be a script
4094 * that does not actually work for plain users; and if root is
4095 * foolish and can be persuaded to run such an unsafe script, he
4096 * might run also non-setuid ones, and deserves what he gets.
4098 * Or, we might drop the PL_euid check above (and rely just on
4099 * fdscript to avoid loops), and do the execs
4105 * Pass fd script to suidperl.
4106 * Exec suidperl, substituting fd script for scriptname.
4107 * Pass script name as "subdir" of fd, which perl will grok;
4108 * in fact will use that to distinguish this from "normal"
4109 * usage, see comments above.
4111 PerlIO_rewind(PL_rsfp);
4112 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4113 /* PSz 27 Feb 04 Sanity checks on scriptname */
4114 if ((!scriptname) || (!*scriptname) ) {
4115 Perl_croak(aTHX_ "No setuid script name\n");
4117 if (*scriptname == '-') {
4118 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4119 /* Or we might confuse it with an option when replacing
4120 * name in argument list, below (though we do pointer, not
4121 * string, comparisons).
4124 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4125 if (!PL_origargv[which]) {
4126 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4128 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4129 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4130 #if defined(HAS_FCNTL) && defined(F_SETFD)
4131 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4134 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4135 (int)PERL_REVISION, (int)PERL_VERSION,
4136 (int)PERL_SUBVERSION), PL_origargv);
4138 #endif /* IAMSUID */
4139 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4142 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4144 * This seems back to front: we try HAS_SETEGID first; if not available
4145 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4146 * in the sense that we only want to set EGID; but are there any machines
4147 * with either of the latter, but not the former? Same with UID, later.
4150 (void)setegid(PL_statbuf.st_gid);
4153 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4155 #ifdef HAS_SETRESGID
4156 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4158 PerlProc_setgid(PL_statbuf.st_gid);
4162 if (PerlProc_getegid() != PL_statbuf.st_gid)
4163 Perl_croak(aTHX_ "Can't do setegid!\n");
4165 if (PL_statbuf.st_mode & S_ISUID) {
4166 if (PL_statbuf.st_uid != PL_euid)
4168 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4171 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4173 #ifdef HAS_SETRESUID
4174 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4176 PerlProc_setuid(PL_statbuf.st_uid);
4180 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4181 Perl_croak(aTHX_ "Can't do seteuid!\n");
4183 else if (PL_uid) { /* oops, mustn't run as root */
4185 (void)seteuid((Uid_t)PL_uid);
4188 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4190 #ifdef HAS_SETRESUID
4191 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4193 PerlProc_setuid((Uid_t)PL_uid);
4197 if (PerlProc_geteuid() != PL_uid)
4198 Perl_croak(aTHX_ "Can't do seteuid!\n");
4201 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4202 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4205 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4206 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4207 else if (fdscript < 0 || suidscript != 1)
4208 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4209 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4211 /* PSz 16 Sep 03 Keep neat error message */
4212 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4215 /* We absolutely must clear out any saved ids here, so we */
4216 /* exec the real perl, substituting fd script for scriptname. */
4217 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4219 * It might be thought that using setresgid and/or setresuid (changed to
4220 * set the saved IDs) above might obviate the need to exec, and we could
4221 * go on to "do the perl thing".
4223 * Is there such a thing as "saved GID", and is that set for setuid (but
4224 * not setgid) execution like suidperl? Without exec, it would not be
4225 * cleared for setuid (but not setgid) scripts (or might need a dummy
4228 * We need suidperl to do the exact same argument checking that perl
4229 * does. Thus it cannot be very small; while it could be significantly
4230 * smaller, it is safer (simpler?) to make it essentially the same
4231 * binary as perl (but they are not identical). - Maybe could defer that
4232 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4233 * but prefer to do thorough checks in suidperl itself. Such deferral
4234 * would make suidperl security rely on perl, a design no-no.
4236 * Setuid things should be short and simple, thus easy to understand and
4237 * verify. They should do their "own thing", without influence by
4238 * attackers. It may help if their internal execution flow is fixed,
4239 * regardless of platform: it may be best to exec anyway.
4241 * Suidperl should at least be conceptually simple: a wrapper only,
4242 * never to do any real perl. Maybe we should put
4244 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4246 * into the perly bits.
4248 PerlIO_rewind(PL_rsfp);
4249 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4251 * Keep original arguments: suidperl already has fd script.
4253 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4254 /* if (!PL_origargv[which]) { */
4255 /* errno = EPERM; */
4256 /* Perl_croak(aTHX_ "Permission denied\n"); */
4258 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4259 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4260 #if defined(HAS_FCNTL) && defined(F_SETFD)
4261 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4264 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4265 (int)PERL_REVISION, (int)PERL_VERSION,
4266 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4268 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4269 #endif /* IAMSUID */
4271 PERL_UNUSED_ARG(fdscript);
4272 PERL_UNUSED_ARG(suidscript);
4273 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4274 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4275 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4276 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4278 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4281 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4282 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4283 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4284 /* not set-id, must be wrapped */
4287 PERL_UNUSED_ARG(validarg);
4288 PERL_UNUSED_ARG(scriptname);
4292 S_find_beginning(pTHX)
4296 register const char *s2;
4297 #ifdef MACOS_TRADITIONAL
4301 /* skip forward in input to the real script? */
4303 #ifdef MACOS_TRADITIONAL
4304 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4306 while (PL_doextract || gMacPerl_AlwaysExtract) {
4307 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4308 if (!gMacPerl_AlwaysExtract)
4309 Perl_croak(aTHX_ "No Perl script found in input\n");
4311 if (PL_doextract) /* require explicit override ? */
4312 if (!OverrideExtract(PL_origfilename))
4313 Perl_croak(aTHX_ "User aborted script\n");
4315 PL_doextract = FALSE;
4317 /* Pater peccavi, file does not have #! */
4318 PerlIO_rewind(PL_rsfp);
4323 while (PL_doextract) {
4324 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4325 Perl_croak(aTHX_ "No Perl script found in input\n");
4328 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4329 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4330 PL_doextract = FALSE;
4331 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4333 while (*s == ' ' || *s == '\t') s++;
4335 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4336 || s2[-1] == '_') s2--;
4337 if (strnEQ(s2-4,"perl",4))
4338 while ((s = moreswitches(s)))
4341 #ifdef MACOS_TRADITIONAL
4342 /* We are always searching for the #!perl line in MacPerl,
4343 * so if we find it, still keep the line count correct
4344 * by counting lines we already skipped over
4346 for (; maclines > 0 ; maclines--)
4347 PerlIO_ungetc(PL_rsfp, '\n');
4351 /* gMacPerl_AlwaysExtract is false in MPW tool */
4352 } else if (gMacPerl_AlwaysExtract) {
4364 PL_uid = PerlProc_getuid();
4365 PL_euid = PerlProc_geteuid();
4366 PL_gid = PerlProc_getgid();
4367 PL_egid = PerlProc_getegid();
4369 PL_uid |= PL_gid << 16;
4370 PL_euid |= PL_egid << 16;
4372 /* Should not happen: */
4373 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4374 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4377 * Should go by suidscript, not uid!=euid: why disallow
4378 * system("ls") in scripts run from setuid things?
4379 * Or, is this run before we check arguments and set suidscript?
4380 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4381 * (We never have suidscript, can we be sure to have fdscript?)
4382 * Or must then go by UID checks? See comments in forbid_setid also.
4386 /* This is used very early in the lifetime of the program,
4387 * before even the options are parsed, so PL_tainting has
4388 * not been initialized properly. */
4390 Perl_doing_taint(int argc, char *argv[], char *envp[])
4392 #ifndef PERL_IMPLICIT_SYS
4393 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4394 * before we have an interpreter-- and the whole point of this
4395 * function is to be called at such an early stage. If you are on
4396 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4397 * "tainted because running with altered effective ids', you'll
4398 * have to add your own checks somewhere in here. The two most
4399 * known samples of 'implicitness' are Win32 and NetWare, neither
4400 * of which has much of concept of 'uids'. */
4401 int uid = PerlProc_getuid();
4402 int euid = PerlProc_geteuid();
4403 int gid = PerlProc_getgid();
4404 int egid = PerlProc_getegid();
4411 if (uid && (euid != uid || egid != gid))
4413 #endif /* !PERL_IMPLICIT_SYS */
4414 /* This is a really primitive check; environment gets ignored only
4415 * if -T are the first chars together; otherwise one gets
4416 * "Too late" message. */
4417 if ( argc > 1 && argv[1][0] == '-'
4418 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4423 /* Passing the flag as a single char rather than a string is a slight space
4424 optimisation. The only message that isn't /^-.$/ is
4425 "program input from stdin", which is substituted in place of '\0', which
4426 could never be a command line flag. */
4428 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4431 char string[3] = "-x";
4432 const char *message = "program input from stdin";
4439 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4440 if (PL_euid != PL_uid)
4441 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4442 if (PL_egid != PL_gid)
4443 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4444 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4446 * Checks for UID/GID above "wrong": why disallow
4447 * perl -e 'print "Hello\n"'
4448 * from within setuid things?? Simply drop them: replaced by
4449 * fdscript/suidscript and #ifdef IAMSUID checks below.
4451 * This may be too late for command-line switches. Will catch those on
4452 * the #! line, after finding the script name and setting up
4453 * fdscript/suidscript. Note that suidperl does not get around to
4454 * parsing (and checking) the switches on the #! line, but checks that
4455 * the two sets are identical.
4457 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4458 * instead, or would that be "too late"? (We never have suidscript, can
4459 * we be sure to have fdscript?)
4461 * Catch things with suidscript (in descendant of suidperl), even with
4462 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4463 * below; but I am paranoid.
4465 * Also see comments about root running a setuid script, elsewhere.
4467 if (suidscript >= 0)
4468 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4470 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4471 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4472 #endif /* IAMSUID */
4476 Perl_init_debugger(pTHX)
4479 HV * const ostash = PL_curstash;
4481 PL_curstash = PL_debstash;
4482 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4484 AvREAL_off(PL_dbargs);
4485 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4486 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4487 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4488 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4489 sv_setiv(PL_DBsingle, 0);
4490 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4491 sv_setiv(PL_DBtrace, 0);
4492 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4493 sv_setiv(PL_DBsignal, 0);
4494 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4495 sv_setiv(PL_DBassertion, 0);
4496 PL_curstash = ostash;
4499 #ifndef STRESS_REALLOC
4500 #define REASONABLE(size) (size)
4502 #define REASONABLE(size) (1) /* unreasonable */
4506 Perl_init_stacks(pTHX)
4509 /* start with 128-item stack and 8K cxstack */
4510 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4511 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4512 PL_curstackinfo->si_type = PERLSI_MAIN;
4513 PL_curstack = PL_curstackinfo->si_stack;
4514 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4516 PL_stack_base = AvARRAY(PL_curstack);
4517 PL_stack_sp = PL_stack_base;
4518 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4520 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4523 PL_tmps_max = REASONABLE(128);
4525 Newx(PL_markstack,REASONABLE(32),I32);
4526 PL_markstack_ptr = PL_markstack;
4527 PL_markstack_max = PL_markstack + REASONABLE(32);
4531 Newx(PL_scopestack,REASONABLE(32),I32);
4532 PL_scopestack_ix = 0;
4533 PL_scopestack_max = REASONABLE(32);
4535 Newx(PL_savestack,REASONABLE(128),ANY);
4536 PL_savestack_ix = 0;
4537 PL_savestack_max = REASONABLE(128);
4546 while (PL_curstackinfo->si_next)
4547 PL_curstackinfo = PL_curstackinfo->si_next;
4548 while (PL_curstackinfo) {
4549 PERL_SI *p = PL_curstackinfo->si_prev;
4550 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4551 Safefree(PL_curstackinfo->si_cxstack);
4552 Safefree(PL_curstackinfo);
4553 PL_curstackinfo = p;
4555 Safefree(PL_tmps_stack);
4556 Safefree(PL_markstack);
4557 Safefree(PL_scopestack);
4558 Safefree(PL_savestack);
4568 lex_start(PL_linestr);
4570 PL_subname = newSVpvs("main");
4574 S_init_predump_symbols(pTHX)
4580 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4581 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4582 GvMULTI_on(PL_stdingv);
4583 io = GvIOp(PL_stdingv);
4584 IoTYPE(io) = IoTYPE_RDONLY;
4585 IoIFP(io) = PerlIO_stdin();
4586 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4588 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4590 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4593 IoTYPE(io) = IoTYPE_WRONLY;
4594 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4596 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4598 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4600 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4601 GvMULTI_on(PL_stderrgv);
4602 io = GvIOp(PL_stderrgv);
4603 IoTYPE(io) = IoTYPE_WRONLY;
4604 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4605 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4607 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4609 PL_statname = newSV(0); /* last filename we did stat on */
4611 Safefree(PL_osname);
4612 PL_osname = savepv(OSNAME);
4616 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4619 argc--,argv++; /* skip name of script */
4620 if (PL_doswitches) {
4621 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4625 if (argv[0][1] == '-' && !argv[0][2]) {
4629 if ((s = strchr(argv[0], '='))) {
4630 const char *const start_name = argv[0] + 1;
4631 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4632 TRUE, SVt_PV)), s + 1);
4635 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4638 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4639 GvMULTI_on(PL_argvgv);
4640 (void)gv_AVadd(PL_argvgv);
4641 av_clear(GvAVn(PL_argvgv));
4642 for (; argc > 0; argc--,argv++) {
4643 SV * const sv = newSVpv(argv[0],0);
4644 av_push(GvAVn(PL_argvgv),sv);
4645 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4646 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4649 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4650 (void)sv_utf8_decode(sv);
4656 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4661 PL_toptarget = newSV_type(SVt_PVFM);
4662 sv_setpvn(PL_toptarget, "", 0);
4663 PL_bodytarget = newSV_type(SVt_PVFM);
4664 sv_setpvn(PL_bodytarget, "", 0);
4665 PL_formtarget = PL_bodytarget;
4669 init_argv_symbols(argc,argv);
4671 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4672 #ifdef MACOS_TRADITIONAL
4673 /* $0 is not majick on a Mac */
4674 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4676 sv_setpv(GvSV(tmpgv),PL_origfilename);
4677 magicname("0", "0", 1);
4680 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4682 bool env_is_not_environ;
4683 GvMULTI_on(PL_envgv);
4684 hv = GvHVn(PL_envgv);
4685 hv_magic(hv, NULL, PERL_MAGIC_env);
4687 #ifdef USE_ENVIRON_ARRAY
4688 /* Note that if the supplied env parameter is actually a copy
4689 of the global environ then it may now point to free'd memory
4690 if the environment has been modified since. To avoid this
4691 problem we treat env==NULL as meaning 'use the default'
4695 env_is_not_environ = env != environ;
4696 if (env_is_not_environ
4697 # ifdef USE_ITHREADS
4698 && PL_curinterp == aTHX
4707 for (; *env; env++) {
4708 if (!(s = strchr(*env,'=')) || s == *env)
4710 #if defined(MSDOS) && !defined(DJGPP)
4715 sv = newSVpv(s+1, 0);
4716 (void)hv_store(hv, *env, s - *env, sv, 0);
4717 if (env_is_not_environ)
4721 #endif /* USE_ENVIRON_ARRAY */
4722 #endif /* !PERL_MICRO */
4725 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4726 SvREADONLY_off(GvSV(tmpgv));
4727 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4728 SvREADONLY_on(GvSV(tmpgv));
4730 #ifdef THREADS_HAVE_PIDS
4731 PL_ppid = (IV)getppid();
4734 /* touch @F array to prevent spurious warnings 20020415 MJD */
4736 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4741 S_init_perllib(pTHX)
4747 s = PerlEnv_getenv("PERL5LIB");
4749 * It isn't possible to delete an environment variable with
4750 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4751 * case we treat PERL5LIB as undefined if it has a zero-length value.
4753 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4754 if (s && *s != '\0')
4758 incpush(s, TRUE, TRUE, TRUE, FALSE);
4760 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4762 /* Treat PERL5?LIB as a possible search list logical name -- the
4763 * "natural" VMS idiom for a Unix path string. We allow each
4764 * element to be a set of |-separated directories for compatibility.
4768 if (my_trnlnm("PERL5LIB",buf,0))
4769 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4771 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4775 /* Use the ~-expanded versions of APPLLIB (undocumented),
4776 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4779 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4783 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4785 #ifdef MACOS_TRADITIONAL
4788 SV * privdir = newSV(0);
4789 char * macperl = PerlEnv_getenv("MACPERL");
4794 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4795 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4796 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4797 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4798 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4799 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4801 SvREFCNT_dec(privdir);
4804 incpush(":", FALSE, FALSE, TRUE, FALSE);
4807 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4810 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4812 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4816 /* sitearch is always relative to sitelib on Windows for
4817 * DLL-based path intuition to work correctly */
4818 # if !defined(WIN32)
4819 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4825 /* this picks up sitearch as well */
4826 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4828 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4832 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4833 /* Search for version-specific dirs below here */
4834 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4837 #ifdef PERL_VENDORARCH_EXP
4838 /* vendorarch is always relative to vendorlib on Windows for
4839 * DLL-based path intuition to work correctly */
4840 # if !defined(WIN32)
4841 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4845 #ifdef PERL_VENDORLIB_EXP
4847 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4849 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4853 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4854 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4857 #ifdef PERL_OTHERLIBDIRS
4858 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4862 incpush(".", FALSE, FALSE, TRUE, FALSE);
4863 #endif /* MACOS_TRADITIONAL */
4866 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4867 # define PERLLIB_SEP ';'
4870 # define PERLLIB_SEP '|'
4872 # if defined(MACOS_TRADITIONAL)
4873 # define PERLLIB_SEP ','
4875 # define PERLLIB_SEP ':'
4879 #ifndef PERLLIB_MANGLE
4880 # define PERLLIB_MANGLE(s,n) (s)
4883 /* Push a directory onto @INC if it exists.
4884 Generate a new SV if we do this, to save needing to copy the SV we push
4887 S_incpush_if_exists(pTHX_ SV *dir)
4891 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4892 S_ISDIR(tmpstatbuf.st_mode)) {
4893 av_push(GvAVn(PL_incgv), dir);
4900 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4905 const char *p = dir;
4910 if (addsubdirs || addoldvers) {
4914 /* Break at all separators */
4916 SV *libdir = newSV(0);
4919 /* skip any consecutive separators */
4921 while ( *p == PERLLIB_SEP ) {
4922 /* Uncomment the next line for PATH semantics */
4923 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4928 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4929 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4934 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4935 p = NULL; /* break out */
4937 #ifdef MACOS_TRADITIONAL
4938 if (!strchr(SvPVX(libdir), ':')) {
4941 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4943 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4944 sv_catpvs(libdir, ":");
4947 /* Do the if() outside the #ifdef to avoid warnings about an unused
4950 #ifdef PERL_RELOCATABLE_INC
4952 * Relocatable include entries are marked with a leading .../
4955 * 0: Remove that leading ".../"
4956 * 1: Remove trailing executable name (anything after the last '/')
4957 * from the perl path to give a perl prefix
4959 * While the @INC element starts "../" and the prefix ends with a real
4960 * directory (ie not . or ..) chop that real directory off the prefix
4961 * and the leading "../" from the @INC element. ie a logical "../"
4963 * Finally concatenate the prefix and the remainder of the @INC element
4964 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4965 * generates /usr/local/lib/perl5
4967 const char *libpath = SvPVX(libdir);
4968 STRLEN libpath_len = SvCUR(libdir);
4969 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4971 SV * const caret_X = get_sv("\030", 0);
4972 /* Going to use the SV just as a scratch buffer holding a C
4978 /* $^X is *the* source of taint if tainting is on, hence
4979 SvPOK() won't be true. */
4981 assert(SvPOKp(caret_X));
4982 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4983 /* Firstly take off the leading .../
4984 If all else fail we'll do the paths relative to the current
4986 sv_chop(libdir, libpath + 4);
4987 /* Don't use SvPV as we're intentionally bypassing taining,
4988 mortal copies that the mg_get of tainting creates, and
4989 corruption that seems to come via the save stack.
4990 I guess that the save stack isn't correctly set up yet. */
4991 libpath = SvPVX(libdir);
4992 libpath_len = SvCUR(libdir);
4994 /* This would work more efficiently with memrchr, but as it's
4995 only a GNU extension we'd need to probe for it and
4996 implement our own. Not hard, but maybe not worth it? */
4998 prefix = SvPVX(prefix_sv);
4999 lastslash = strrchr(prefix, '/');
5001 /* First time in with the *lastslash = '\0' we just wipe off
5002 the trailing /perl from (say) /usr/foo/bin/perl
5006 while ((*lastslash = '\0'), /* Do that, come what may. */
5007 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5008 && (lastslash = strrchr(prefix, '/')))) {
5009 if (lastslash[1] == '\0'
5010 || (lastslash[1] == '.'
5011 && (lastslash[2] == '/' /* ends "/." */
5012 || (lastslash[2] == '/'
5013 && lastslash[3] == '/' /* or "/.." */
5015 /* Prefix ends "/" or "/." or "/..", any of which
5016 are fishy, so don't do any more logical cleanup.
5020 /* Remove leading "../" from path */
5023 /* Next iteration round the loop removes the last
5024 directory name from prefix by writing a '\0' in
5025 the while clause. */
5027 /* prefix has been terminated with a '\0' to the correct
5028 length. libpath points somewhere into the libdir SV.
5029 We need to join the 2 with '/' and drop the result into
5031 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5032 SvREFCNT_dec(libdir);
5033 /* And this is the new libdir. */
5036 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5037 /* Need to taint reloccated paths if running set ID */
5038 SvTAINTED_on(libdir);
5041 SvREFCNT_dec(prefix_sv);
5046 * BEFORE pushing libdir onto @INC we may first push version- and
5047 * archname-specific sub-directories.
5049 if (addsubdirs || addoldvers) {
5050 #ifdef PERL_INC_VERSION_LIST
5051 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5052 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5053 const char * const *incver;
5059 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5061 while (unix[len-1] == '/') len--; /* Cosmetic */
5062 sv_usepvn(libdir,unix,len);
5065 PerlIO_printf(Perl_error_log,
5066 "Failed to unixify @INC element \"%s\"\n",
5070 #ifdef MACOS_TRADITIONAL
5071 #define PERL_AV_SUFFIX_FMT ""
5072 #define PERL_ARCH_FMT "%s:"
5073 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5075 #define PERL_AV_SUFFIX_FMT "/"
5076 #define PERL_ARCH_FMT "/%s"
5077 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5079 /* .../version/archname if -d .../version/archname */
5080 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5082 (int)PERL_REVISION, (int)PERL_VERSION,
5083 (int)PERL_SUBVERSION, ARCHNAME);
5084 subdir = S_incpush_if_exists(aTHX_ subdir);
5086 /* .../version if -d .../version */
5087 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5089 (int)PERL_REVISION, (int)PERL_VERSION,
5090 (int)PERL_SUBVERSION);
5091 subdir = S_incpush_if_exists(aTHX_ subdir);
5093 /* .../archname if -d .../archname */
5094 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5095 SVfARG(libdir), ARCHNAME);
5096 subdir = S_incpush_if_exists(aTHX_ subdir);
5100 #ifdef PERL_INC_VERSION_LIST
5102 for (incver = incverlist; *incver; incver++) {
5103 /* .../xxx if -d .../xxx */
5104 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5105 SVfARG(libdir), *incver);
5106 subdir = S_incpush_if_exists(aTHX_ subdir);
5112 /* finally push this lib directory on the end of @INC */
5113 av_push(GvAVn(PL_incgv), libdir);
5116 assert (SvREFCNT(subdir) == 1);
5117 SvREFCNT_dec(subdir);
5123 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5127 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5133 while (av_len(paramList) >= 0) {
5134 cv = (CV*)av_shift(paramList);
5136 if (paramList == PL_beginav) {
5137 /* save PL_beginav for compiler */
5138 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5140 else if (paramList == PL_checkav) {
5141 /* save PL_checkav for compiler */
5142 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5144 else if (paramList == PL_unitcheckav) {
5145 /* save PL_unitcheckav for compiler */
5146 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5157 PL_madskills |= 16384;
5162 PL_madskills &= ~16384;
5165 (void)SvPV_const(atsv, len);
5166 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5167 break; /* not really trying to run, so just wing it */
5169 PL_curcop = &PL_compiling;
5170 CopLINE_set(PL_curcop, oldline);
5171 if (paramList == PL_beginav)
5172 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5174 Perl_sv_catpvf(aTHX_ atsv,
5175 "%s failed--call queue aborted",
5176 paramList == PL_checkav ? "CHECK"
5177 : paramList == PL_initav ? "INIT"
5178 : paramList == PL_unitcheckav ? "UNITCHECK"
5180 while (PL_scopestack_ix > oldscope)
5183 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5190 /* my_exit() was called */
5191 while (PL_scopestack_ix > oldscope)
5194 PL_curstash = PL_defstash;
5195 PL_curcop = &PL_compiling;
5196 CopLINE_set(PL_curcop, oldline);
5198 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5199 return; /* not really trying to run, so just wing it */
5200 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5201 if (paramList == PL_beginav)
5202 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5204 Perl_croak(aTHX_ "%s failed--call queue aborted",
5205 paramList == PL_checkav ? "CHECK"
5206 : paramList == PL_initav ? "INIT"
5207 : paramList == PL_unitcheckav ? "UNITCHECK"
5214 PL_curcop = &PL_compiling;
5215 CopLINE_set(PL_curcop, oldline);
5218 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5227 Perl_my_exit(pTHX_ U32 status)
5230 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5231 (void*)thr, (unsigned long) status));
5240 STATUS_EXIT_SET(status);
5247 Perl_my_failure_exit(pTHX)
5251 /* We have been called to fall on our sword. The desired exit code
5252 * should be already set in STATUS_UNIX, but could be shifted over
5253 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5256 * If an error code has not been set, then force the issue.
5258 if (MY_POSIX_EXIT) {
5260 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5261 * the exit code when there isn't an error.
5264 if (STATUS_UNIX == 0)
5265 STATUS_UNIX_EXIT_SET(255);
5267 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5269 /* The exit code could have been set by $? or vmsish which
5270 * means that it may not be fatal. So convert
5271 * success/warning codes to fatal.
5273 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5274 STATUS_UNIX_EXIT_SET(255);
5278 /* Traditionally Perl on VMS always expects a Fatal Error. */
5279 if (vaxc$errno & 1) {
5281 /* So force success status to failure */
5282 if (STATUS_NATIVE & 1)
5287 STATUS_UNIX = EINTR; /* In case something cares */
5292 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5294 /* Encode the severity code */
5295 severity = STATUS_NATIVE & STS$M_SEVERITY;
5296 STATUS_UNIX = (severity ? severity : 1) << 8;
5298 /* Perl expects this to be a fatal error */
5299 if (severity != STS$K_SEVERE)
5308 STATUS_UNIX_SET(errno);
5310 exitstatus = STATUS_UNIX >> 8;
5311 if (exitstatus & 255)
5312 STATUS_UNIX_SET(exitstatus);
5314 STATUS_UNIX_SET(255);
5321 S_my_exit_jump(pTHX)
5326 SvREFCNT_dec(PL_e_script);
5330 POPSTACK_TO(PL_mainstack);
5338 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5341 const char * const p = SvPVX_const(PL_e_script);
5342 const char *nl = strchr(p, '\n');
5344 PERL_UNUSED_ARG(idx);
5345 PERL_UNUSED_ARG(maxlen);
5347 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5349 filter_del(read_e_script);
5352 sv_catpvn(buf_sv, p, nl-p);
5353 sv_chop(PL_e_script, nl);
5359 * c-indentation-style: bsd
5361 * indent-tabs-mode: t
5364 * ex: set ts=8 sts=4 sw=4 noet: