3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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
141 /* This reference ensures that the mathoms are linked with perl */
142 extern void Perl_mathoms(void);
143 void Perl_mathoms_ref(void);
144 void Perl_mathoms_ref(void) {
150 S_init_tls_and_interp(PerlInterpreter *my_perl)
154 PERL_SET_INTERP(my_perl);
155 #if defined(USE_ITHREADS)
158 PERL_SET_THX(my_perl);
160 MUTEX_INIT(&PL_dollarzero_mutex);
164 PERL_SET_THX(my_perl);
168 #ifdef PERL_IMPLICIT_SYS
170 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
171 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
172 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
173 struct IPerlDir* ipD, struct IPerlSock* ipS,
174 struct IPerlProc* ipP)
176 PerlInterpreter *my_perl;
177 /* Newx() needs interpreter, so call malloc() instead */
178 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
179 S_init_tls_and_interp(my_perl);
180 Zero(my_perl, 1, PerlInterpreter);
196 =head1 Embedding Functions
198 =for apidoc perl_alloc
200 Allocates a new Perl interpreter. See L<perlembed>.
208 PerlInterpreter *my_perl;
210 /* Newx() needs interpreter, so call malloc() instead */
211 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
213 S_init_tls_and_interp(my_perl);
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 #endif /* PERL_IMPLICIT_SYS */
219 =for apidoc perl_construct
221 Initializes a new Perl interpreter. See L<perlembed>.
227 perl_construct(pTHXx)
230 PERL_UNUSED_ARG(my_perl);
233 PL_perl_destruct_level = 1;
235 if (PL_perl_destruct_level > 0)
238 /* Init the real globals (and main thread)? */
240 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
242 PL_linestr = NEWSV(65,79);
243 sv_upgrade(PL_linestr,SVt_PVIV);
245 if (!SvREADONLY(&PL_sv_undef)) {
246 /* set read-only and try to insure than we wont see REFCNT==0
249 SvREADONLY_on(&PL_sv_undef);
250 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
252 sv_setpv(&PL_sv_no,PL_No);
253 /* value lookup in void context - happens to have the side effect
254 of caching the numeric forms. */
257 SvREADONLY_on(&PL_sv_no);
258 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
260 sv_setpv(&PL_sv_yes,PL_Yes);
263 SvREADONLY_on(&PL_sv_yes);
264 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
266 SvREADONLY_on(&PL_sv_placeholder);
267 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
270 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
271 #ifdef PERL_USES_PL_PIDSTATUS
272 PL_pidstatus = newHV();
276 PL_rs = newSVpvn("\n", 1);
281 PL_lex_state = LEX_NOTPARSING;
287 SET_NUMERIC_STANDARD();
289 #if defined(LOCAL_PATCH_COUNT)
290 PL_localpatches = local_patches; /* For possible -v */
293 #ifdef HAVE_INTERP_INTERN
297 PerlIO_init(aTHX); /* Hook to IO system */
299 PL_fdpid = newAV(); /* for remembering popen pids by fd */
300 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
301 PL_errors = newSVpvn("",0);
302 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
303 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
304 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
306 PL_regex_padav = newAV();
307 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
308 PL_regex_pad = AvARRAY(PL_regex_padav);
310 #ifdef USE_REENTRANT_API
311 Perl_reentrant_init(aTHX);
314 /* Note that strtab is a rather special HV. Assumptions are made
315 about not iterating on it, and not adding tie magic to it.
316 It is properly deallocated in perl_destruct() */
319 HvSHAREKEYS_off(PL_strtab); /* mandatory */
320 hv_ksplit(PL_strtab, 512);
322 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
323 _dyld_lookup_and_bind
324 ("__environ", (unsigned long *) &environ_pointer, NULL);
328 # ifdef USE_ENVIRON_ARRAY
329 PL_origenviron = environ;
333 /* Use sysconf(_SC_CLK_TCK) if available, if not
334 * available or if the sysconf() fails, use the HZ.
335 * BeOS has those, but returns the wrong value.
336 * The HZ if not originally defined has been by now
337 * been defined as CLK_TCK, if available. */
338 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
339 PL_clocktick = sysconf(_SC_CLK_TCK);
340 if (PL_clocktick <= 0)
344 PL_stashcache = newHV();
346 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
347 (int)PERL_VERSION, (int)PERL_SUBVERSION);
350 if (!PL_mmap_page_size) {
351 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
353 SETERRNO(0, SS_NORMAL);
355 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
357 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
359 if ((long) PL_mmap_page_size < 0) {
361 SV * const error = ERRSV;
362 (void) SvUPGRADE(error, SVt_PV);
363 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
366 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
370 # ifdef HAS_GETPAGESIZE
371 PL_mmap_page_size = getpagesize();
373 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
374 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
378 if (PL_mmap_page_size <= 0)
379 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
380 (IV) PL_mmap_page_size);
382 #endif /* HAS_MMAP */
384 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
385 PL_timesbase.tms_utime = 0;
386 PL_timesbase.tms_stime = 0;
387 PL_timesbase.tms_cutime = 0;
388 PL_timesbase.tms_cstime = 0;
395 =for apidoc nothreadhook
397 Stub that provides thread hook for perl_destruct when there are
404 Perl_nothreadhook(pTHX)
409 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
411 Perl_dump_sv_child(pTHX_ SV *sv)
414 const int sock = PL_dumper_fd;
415 const int debug_fd = PerlIO_fileno(Perl_debug_log);
416 union control_un control;
419 struct cmsghdr *cmptr;
421 unsigned char buffer[256];
423 if(sock == -1 || debug_fd == -1)
426 PerlIO_flush(Perl_debug_log);
428 /* All these shenanigans are to pass a file descriptor over to our child for
429 it to dump out to. We can't let it hold open the file descriptor when it
430 forks, as the file descriptor it will dump to can turn out to be one end
431 of pipe that some other process will wait on for EOF. (So as it would
432 be open, the wait would be forever. */
434 msg.msg_control = control.control;
435 msg.msg_controllen = sizeof(control.control);
436 /* We're a connected socket so we don't need a destination */
442 cmptr = CMSG_FIRSTHDR(&msg);
443 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
444 cmptr->cmsg_level = SOL_SOCKET;
445 cmptr->cmsg_type = SCM_RIGHTS;
446 *((int *)CMSG_DATA(cmptr)) = 1;
448 vec[0].iov_base = (void*)&sv;
449 vec[0].iov_len = sizeof(sv);
450 got = sendmsg(sock, &msg, 0);
453 perror("Debug leaking scalars parent sendmsg failed");
456 if(got < sizeof(sv)) {
457 perror("Debug leaking scalars parent short sendmsg");
461 /* Return protocol is
463 unsigned char: length of location string (0 for empty)
464 unsigned char*: string (not terminated)
466 vec[0].iov_base = (void*)&returned_errno;
467 vec[0].iov_len = sizeof(returned_errno);
468 vec[1].iov_base = buffer;
471 got = readv(sock, vec, 2);
474 perror("Debug leaking scalars parent read failed");
475 PerlIO_flush(PerlIO_stderr());
478 if(got < sizeof(returned_errno) + 1) {
479 perror("Debug leaking scalars parent short read");
480 PerlIO_flush(PerlIO_stderr());
485 got = read(sock, buffer + 1, *buffer);
487 perror("Debug leaking scalars parent read 2 failed");
488 PerlIO_flush(PerlIO_stderr());
493 perror("Debug leaking scalars parent short read 2");
494 PerlIO_flush(PerlIO_stderr());
499 if (returned_errno || *buffer) {
500 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
501 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
502 returned_errno, strerror(returned_errno));
508 =for apidoc perl_destruct
510 Shuts down a Perl interpreter. See L<perlembed>.
519 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
521 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
525 PERL_UNUSED_ARG(my_perl);
527 /* wait for all pseudo-forked children to finish */
528 PERL_WAIT_FOR_CHILDREN;
530 destruct_level = PL_perl_destruct_level;
533 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
535 const int i = atoi(s);
536 if (destruct_level < i)
542 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
548 if (PL_endav && !PL_minus_c)
549 call_list(PL_scopestack_ix, PL_endav);
555 /* Need to flush since END blocks can produce output */
558 if (CALL_FPTR(PL_threadhook)(aTHX)) {
559 /* Threads hook has vetoed further cleanup */
563 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
564 if (destruct_level != 0) {
565 /* Fork here to create a child. Our child's job is to preserve the
566 state of scalars prior to destruction, so that we can instruct it
567 to dump any scalars that we later find have leaked.
568 There's no subtlety in this code - it assumes POSIX, and it doesn't
572 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
573 perror("Debug leaking scalars socketpair failed");
579 perror("Debug leaking scalars fork failed");
583 /* We are the child */
584 const int sock = fd[1];
585 const int debug_fd = PerlIO_fileno(Perl_debug_log);
588 /* Our success message is an integer 0, and a char 0 */
589 static const char success[sizeof(int) + 1];
593 /* We need to close all other file descriptors otherwise we end up
594 with interesting hangs, where the parent closes its end of a
595 pipe, and sits waiting for (another) child to terminate. Only
596 that child never terminates, because it never gets EOF, because
597 we also have the far end of the pipe open. We even need to
598 close the debugging fd, because sometimes it happens to be one
599 end of a pipe, and a process is waiting on the other end for
600 EOF. Normally it would be closed at some point earlier in
601 destruction, but if we happen to cause the pipe to remain open,
602 EOF never occurs, and we get an infinite hang. Hence all the
603 games to pass in a file descriptor if it's actually needed. */
605 f = sysconf(_SC_OPEN_MAX);
607 where = "sysconf failed";
618 union control_un control;
621 struct cmsghdr *cmptr;
625 msg.msg_control = control.control;
626 msg.msg_controllen = sizeof(control.control);
627 /* We're a connected socket so we don't need a source */
631 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
633 vec[0].iov_base = (void*)⌖
634 vec[0].iov_len = sizeof(target);
636 got = recvmsg(sock, &msg, 0);
641 where = "recv failed";
644 if(got < sizeof(target)) {
645 where = "short recv";
649 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
653 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
654 where = "wrong cmsg_len";
657 if(cmptr->cmsg_level != SOL_SOCKET) {
658 where = "wrong cmsg_level";
661 if(cmptr->cmsg_type != SCM_RIGHTS) {
662 where = "wrong cmsg_type";
666 got_fd = *(int*)CMSG_DATA(cmptr);
667 /* For our last little bit of trickery, put the file descriptor
668 back into Perl_debug_log, as if we never actually closed it
670 if(got_fd != debug_fd) {
671 if (dup2(got_fd, debug_fd) == -1) {
678 PerlIO_flush(Perl_debug_log);
680 got = write(sock, &success, sizeof(success));
683 where = "write failed";
686 if(got < sizeof(success)) {
687 where = "short write";
694 int send_errno = errno;
695 unsigned char length = (unsigned char) strlen(where);
696 struct iovec failure[3] = {
697 {(void*)&send_errno, sizeof(send_errno)},
699 {(void*)where, length}
701 int got = writev(sock, failure, 3);
702 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
703 in the parent if we try to read from the socketpair after the
704 child has exited, even if there was data to read.
705 So sleep a bit to give the parent a fighting chance of
708 _exit((got == -1) ? errno : 0);
712 PL_dumper_fd = fd[0];
717 /* We must account for everything. */
719 /* Destroy the main CV and syntax tree */
720 /* Do this now, because destroying ops can cause new SVs to be generated
721 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
722 PL_curcop to point to a valid op from which the filename structure
724 PL_curcop = &PL_compiling;
726 /* ensure comppad/curpad to refer to main's pad */
727 if (CvPADLIST(PL_main_cv)) {
728 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
730 op_free(PL_main_root);
731 PL_main_root = Nullop;
733 PL_main_start = Nullop;
734 SvREFCNT_dec(PL_main_cv);
738 /* Tell PerlIO we are about to tear things apart in case
739 we have layers which are using resources that should
743 PerlIO_destruct(aTHX);
745 if (PL_sv_objcount) {
747 * Try to destruct global references. We do this first so that the
748 * destructors and destructees still exist. Some sv's might remain.
749 * Non-referenced objects are on their own.
753 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
754 PL_defoutgv = Nullgv; /* may have been freed */
757 /* unhook hooks which will soon be, or use, destroyed data */
758 SvREFCNT_dec(PL_warnhook);
759 PL_warnhook = Nullsv;
760 SvREFCNT_dec(PL_diehook);
763 /* call exit list functions */
764 while (PL_exitlistlen-- > 0)
765 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
767 Safefree(PL_exitlist);
772 if (destruct_level == 0){
774 DEBUG_P(debprofdump());
776 #if defined(PERLIO_LAYERS)
777 /* No more IO - including error messages ! */
778 PerlIO_cleanup(aTHX);
781 /* The exit() function will do everything that needs doing. */
785 /* jettison our possibly duplicated environment */
786 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
787 * so we certainly shouldn't free it here
790 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
791 if (environ != PL_origenviron && !PL_use_safe_putenv
793 /* only main thread can free environ[0] contents */
794 && PL_curinterp == aTHX
800 for (i = 0; environ[i]; i++)
801 safesysfree(environ[i]);
803 /* Must use safesysfree() when working with environ. */
804 safesysfree(environ);
806 environ = PL_origenviron;
809 #endif /* !PERL_MICRO */
811 /* reset so print() ends up where we expect */
815 /* the syntax tree is shared between clones
816 * so op_free(PL_main_root) only ReREFCNT_dec's
817 * REGEXPs in the parent interpreter
818 * we need to manually ReREFCNT_dec for the clones
821 I32 i = AvFILLp(PL_regex_padav) + 1;
822 SV * const * const ary = AvARRAY(PL_regex_padav);
825 SV * const resv = ary[--i];
827 if (SvFLAGS(resv) & SVf_BREAK) {
828 /* this is PL_reg_curpm, already freed
829 * flag is set in regexec.c:S_regtry
831 SvFLAGS(resv) &= ~SVf_BREAK;
833 else if(SvREPADTMP(resv)) {
834 SvREPADTMP_off(resv);
836 else if(SvIOKp(resv)) {
837 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
842 SvREFCNT_dec(PL_regex_padav);
843 PL_regex_padav = Nullav;
847 SvREFCNT_dec((SV*) PL_stashcache);
848 PL_stashcache = NULL;
850 /* loosen bonds of global variables */
853 (void)PerlIO_close(PL_rsfp);
857 /* Filters for program text */
858 SvREFCNT_dec(PL_rsfp_filters);
859 PL_rsfp_filters = Nullav;
862 PL_preprocess = FALSE;
868 PL_doswitches = FALSE;
869 PL_dowarn = G_WARN_OFF;
870 PL_doextract = FALSE;
871 PL_sawampersand = FALSE; /* must save all match strings */
874 Safefree(PL_inplace);
876 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_e_script);
880 PL_e_script = Nullsv;
885 /* magical thingies */
887 SvREFCNT_dec(PL_ofs_sv); /* $, */
890 SvREFCNT_dec(PL_ors_sv); /* $\ */
893 SvREFCNT_dec(PL_rs); /* $/ */
896 PL_multiline = 0; /* $* */
897 Safefree(PL_osname); /* $^O */
900 SvREFCNT_dec(PL_statname);
901 PL_statname = Nullsv;
904 /* defgv, aka *_ should be taken care of elsewhere */
906 /* clean up after study() */
907 SvREFCNT_dec(PL_lastscream);
908 PL_lastscream = Nullsv;
909 Safefree(PL_screamfirst);
911 Safefree(PL_screamnext);
915 Safefree(PL_efloatbuf);
916 PL_efloatbuf = Nullch;
919 /* startup and shutdown function lists */
920 SvREFCNT_dec(PL_beginav);
921 SvREFCNT_dec(PL_beginav_save);
922 SvREFCNT_dec(PL_endav);
923 SvREFCNT_dec(PL_checkav);
924 SvREFCNT_dec(PL_checkav_save);
925 SvREFCNT_dec(PL_initav);
927 PL_beginav_save = Nullav;
930 PL_checkav_save = Nullav;
933 /* shortcuts just get cleared */
939 PL_argvoutgv = Nullgv;
941 PL_stderrgv = Nullgv;
942 PL_last_in_gv = Nullgv;
947 PL_DBsingle = Nullsv;
949 PL_DBsignal = Nullsv;
950 PL_DBassertion = Nullsv;
953 PL_debstash = Nullhv;
955 SvREFCNT_dec(PL_argvout_stack);
956 PL_argvout_stack = Nullav;
958 SvREFCNT_dec(PL_modglobal);
959 PL_modglobal = Nullhv;
960 SvREFCNT_dec(PL_preambleav);
961 PL_preambleav = Nullav;
962 SvREFCNT_dec(PL_subname);
964 SvREFCNT_dec(PL_linestr);
966 #ifdef PERL_USES_PL_PIDSTATUS
967 SvREFCNT_dec(PL_pidstatus);
968 PL_pidstatus = Nullhv;
970 SvREFCNT_dec(PL_toptarget);
971 PL_toptarget = Nullsv;
972 SvREFCNT_dec(PL_bodytarget);
973 PL_bodytarget = Nullsv;
974 PL_formtarget = Nullsv;
976 /* free locale stuff */
977 #ifdef USE_LOCALE_COLLATE
978 Safefree(PL_collation_name);
979 PL_collation_name = Nullch;
982 #ifdef USE_LOCALE_NUMERIC
983 Safefree(PL_numeric_name);
984 PL_numeric_name = Nullch;
985 SvREFCNT_dec(PL_numeric_radix_sv);
986 PL_numeric_radix_sv = Nullsv;
989 /* clear utf8 character classes */
990 SvREFCNT_dec(PL_utf8_alnum);
991 SvREFCNT_dec(PL_utf8_alnumc);
992 SvREFCNT_dec(PL_utf8_ascii);
993 SvREFCNT_dec(PL_utf8_alpha);
994 SvREFCNT_dec(PL_utf8_space);
995 SvREFCNT_dec(PL_utf8_cntrl);
996 SvREFCNT_dec(PL_utf8_graph);
997 SvREFCNT_dec(PL_utf8_digit);
998 SvREFCNT_dec(PL_utf8_upper);
999 SvREFCNT_dec(PL_utf8_lower);
1000 SvREFCNT_dec(PL_utf8_print);
1001 SvREFCNT_dec(PL_utf8_punct);
1002 SvREFCNT_dec(PL_utf8_xdigit);
1003 SvREFCNT_dec(PL_utf8_mark);
1004 SvREFCNT_dec(PL_utf8_toupper);
1005 SvREFCNT_dec(PL_utf8_totitle);
1006 SvREFCNT_dec(PL_utf8_tolower);
1007 SvREFCNT_dec(PL_utf8_tofold);
1008 SvREFCNT_dec(PL_utf8_idstart);
1009 SvREFCNT_dec(PL_utf8_idcont);
1010 PL_utf8_alnum = Nullsv;
1011 PL_utf8_alnumc = Nullsv;
1012 PL_utf8_ascii = Nullsv;
1013 PL_utf8_alpha = Nullsv;
1014 PL_utf8_space = Nullsv;
1015 PL_utf8_cntrl = Nullsv;
1016 PL_utf8_graph = Nullsv;
1017 PL_utf8_digit = Nullsv;
1018 PL_utf8_upper = Nullsv;
1019 PL_utf8_lower = Nullsv;
1020 PL_utf8_print = Nullsv;
1021 PL_utf8_punct = Nullsv;
1022 PL_utf8_xdigit = Nullsv;
1023 PL_utf8_mark = Nullsv;
1024 PL_utf8_toupper = Nullsv;
1025 PL_utf8_totitle = Nullsv;
1026 PL_utf8_tolower = Nullsv;
1027 PL_utf8_tofold = Nullsv;
1028 PL_utf8_idstart = Nullsv;
1029 PL_utf8_idcont = Nullsv;
1031 if (!specialWARN(PL_compiling.cop_warnings))
1032 SvREFCNT_dec(PL_compiling.cop_warnings);
1033 PL_compiling.cop_warnings = Nullsv;
1034 if (!specialCopIO(PL_compiling.cop_io))
1035 SvREFCNT_dec(PL_compiling.cop_io);
1036 PL_compiling.cop_io = Nullsv;
1037 CopFILE_free(&PL_compiling);
1038 CopSTASH_free(&PL_compiling);
1040 /* Prepare to destruct main symbol table. */
1045 SvREFCNT_dec(PL_curstname);
1046 PL_curstname = Nullsv;
1048 /* clear queued errors */
1049 SvREFCNT_dec(PL_errors);
1053 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1054 if (PL_scopestack_ix != 0)
1055 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1057 (long)PL_scopestack_ix);
1058 if (PL_savestack_ix != 0)
1059 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced saves: %ld more saves than restores\n",
1061 (long)PL_savestack_ix);
1062 if (PL_tmps_floor != -1)
1063 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1064 (long)PL_tmps_floor + 1);
1065 if (cxstack_ix != -1)
1066 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1067 (long)cxstack_ix + 1);
1070 /* Now absolutely destruct everything, somehow or other, loops or no. */
1071 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1072 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1074 /* the 2 is for PL_fdpid and PL_strtab */
1075 while (PL_sv_count > 2 && sv_clean_all())
1078 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1079 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1080 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1081 SvFLAGS(PL_strtab) |= SVt_PVHV;
1083 AvREAL_off(PL_fdpid); /* no surviving entries */
1084 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1087 #ifdef HAVE_INTERP_INTERN
1091 /* Destruct the global string table. */
1093 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1094 * so that sv_free() won't fail on them.
1095 * Now that the global string table is using a single hunk of memory
1096 * for both HE and HEK, we either need to explicitly unshare it the
1097 * correct way, or actually free things here.
1100 const I32 max = HvMAX(PL_strtab);
1101 HE * const * const array = HvARRAY(PL_strtab);
1102 HE *hent = array[0];
1105 if (hent && ckWARN_d(WARN_INTERNAL)) {
1106 HE * const next = HeNEXT(hent);
1107 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1108 "Unbalanced string table refcount: (%ld) for \"%s\"",
1109 (long)(HeVAL(hent) - Nullsv), HeKEY(hent));
1116 hent = array[riter];
1121 HvARRAY(PL_strtab) = 0;
1122 HvTOTALKEYS(PL_strtab) = 0;
1123 HvFILL(PL_strtab) = 0;
1125 SvREFCNT_dec(PL_strtab);
1128 /* free the pointer tables used for cloning */
1129 ptr_table_free(PL_ptr_table);
1130 PL_ptr_table = (PTR_TBL_t*)NULL;
1133 /* free special SVs */
1135 SvREFCNT(&PL_sv_yes) = 0;
1136 sv_clear(&PL_sv_yes);
1137 SvANY(&PL_sv_yes) = NULL;
1138 SvFLAGS(&PL_sv_yes) = 0;
1140 SvREFCNT(&PL_sv_no) = 0;
1141 sv_clear(&PL_sv_no);
1142 SvANY(&PL_sv_no) = NULL;
1143 SvFLAGS(&PL_sv_no) = 0;
1147 for (i=0; i<=2; i++) {
1148 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1149 sv_clear(PERL_DEBUG_PAD(i));
1150 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1151 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1155 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1156 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1158 #ifdef DEBUG_LEAKING_SCALARS
1159 if (PL_sv_count != 0) {
1164 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1165 svend = &sva[SvREFCNT(sva)];
1166 for (sv = sva + 1; sv < svend; ++sv) {
1167 if (SvTYPE(sv) != SVTYPEMASK) {
1168 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1170 " refcnt=%"UVuf pTHX__FORMAT "\n"
1171 "\tallocated at %s:%d %s %s%s\n",
1172 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1173 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1175 sv->sv_debug_inpad ? "for" : "by",
1176 sv->sv_debug_optype ?
1177 PL_op_name[sv->sv_debug_optype]: "(none)",
1178 sv->sv_debug_cloned ? " (cloned)" : ""
1180 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1181 Perl_dump_sv_child(aTHX_ sv);
1187 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1191 /* Wait for up to 4 seconds for child to terminate.
1192 This seems to be the least effort way of timing out on reaping
1194 struct timeval waitfor = {4, 0};
1195 int sock = PL_dumper_fd;
1199 FD_SET(sock, &rset);
1200 select(sock + 1, &rset, NULL, NULL, &waitfor);
1201 waitpid(child, &status, WNOHANG);
1209 #if defined(PERLIO_LAYERS)
1210 /* No more IO - including error messages ! */
1211 PerlIO_cleanup(aTHX);
1214 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1215 as currently layers use it rather than Nullsv as a marker
1216 for no arg - and will try and SvREFCNT_dec it.
1218 SvREFCNT(&PL_sv_undef) = 0;
1219 SvREADONLY_off(&PL_sv_undef);
1221 Safefree(PL_origfilename);
1222 PL_origfilename = Nullch;
1223 Safefree(PL_reg_start_tmp);
1224 PL_reg_start_tmp = (char**)NULL;
1225 PL_reg_start_tmpl = 0;
1226 Safefree(PL_reg_curpm);
1227 Safefree(PL_reg_poscache);
1228 free_tied_hv_pool();
1229 Safefree(PL_op_mask);
1230 Safefree(PL_psig_ptr);
1231 PL_psig_ptr = (SV**)NULL;
1232 Safefree(PL_psig_name);
1233 PL_psig_name = (SV**)NULL;
1234 Safefree(PL_bitcount);
1235 PL_bitcount = Nullch;
1236 Safefree(PL_psig_pend);
1237 PL_psig_pend = (int*)NULL;
1238 PL_formfeed = Nullsv;
1240 PL_tainting = FALSE;
1241 PL_taint_warn = FALSE;
1242 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1245 DEBUG_P(debprofdump());
1247 #ifdef USE_REENTRANT_API
1248 Perl_reentrant_free(aTHX);
1253 /* As the absolutely last thing, free the non-arena SV for mess() */
1256 /* we know that type == SVt_PVMG */
1258 /* it could have accumulated taint magic */
1261 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1262 moremagic = mg->mg_moremagic;
1263 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1265 Safefree(mg->mg_ptr);
1269 /* we know that type >= SVt_PV */
1270 SvPV_free(PL_mess_sv);
1271 Safefree(SvANY(PL_mess_sv));
1272 Safefree(PL_mess_sv);
1273 PL_mess_sv = Nullsv;
1279 =for apidoc perl_free
1281 Releases a Perl interpreter. See L<perlembed>.
1289 #if defined(WIN32) || defined(NETWARE)
1290 # if defined(PERL_IMPLICIT_SYS)
1292 void *host = nw_internal_host;
1294 void *host = w32_internal_host;
1296 PerlMem_free(aTHXx);
1298 nw_delete_internal_host(host);
1300 win32_delete_internal_host(host);
1303 PerlMem_free(aTHXx);
1306 PerlMem_free(aTHXx);
1310 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1311 /* provide destructors to clean up the thread key when libperl is unloaded */
1312 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1314 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1315 #pragma fini "perl_fini"
1319 #if defined(__GNUC__)
1320 __attribute__((destructor))
1330 #endif /* THREADS */
1333 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1335 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1336 PL_exitlist[PL_exitlistlen].fn = fn;
1337 PL_exitlist[PL_exitlistlen].ptr = ptr;
1341 #ifdef HAS_PROCSELFEXE
1342 /* This is a function so that we don't hold on to MAXPATHLEN
1343 bytes of stack longer than necessary
1346 S_procself_val(pTHX_ SV *sv, const char *arg0)
1348 char buf[MAXPATHLEN];
1349 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1351 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1352 includes a spurious NUL which will cause $^X to fail in system
1353 or backticks (this will prevent extensions from being built and
1354 many tests from working). readlink is not meant to add a NUL.
1355 Normal readlink works fine.
1357 if (len > 0 && buf[len-1] == '\0') {
1361 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1362 returning the text "unknown" from the readlink rather than the path
1363 to the executable (or returning an error from the readlink). Any valid
1364 path has a '/' in it somewhere, so use that to validate the result.
1365 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1367 if (len > 0 && memchr(buf, '/', len)) {
1368 sv_setpvn(sv,buf,len);
1374 #endif /* HAS_PROCSELFEXE */
1377 S_set_caret_X(pTHX) {
1378 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1380 #ifdef HAS_PROCSELFEXE
1381 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1384 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1386 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1393 =for apidoc perl_parse
1395 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1401 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1408 PERL_UNUSED_VAR(my_perl);
1410 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1413 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1414 setuid perl scripts securely.\n");
1415 #endif /* IAMSUID */
1418 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1419 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1420 * This MUST be done before any hash stores or fetches take place.
1421 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1422 * yourself, it is your responsibility to provide a good random seed!
1423 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1424 if (!PL_rehash_seed_set)
1425 PL_rehash_seed = get_hash_seed();
1427 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1429 if (s && (atoi(s) == 1))
1430 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1432 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1438 /* Set PL_origalen be the sum of the contiguous argv[]
1439 * elements plus the size of the env in case that it is
1440 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1441 * as the maximum modifiable length of $0. In the worst case
1442 * the area we are able to modify is limited to the size of
1443 * the original argv[0]. (See below for 'contiguous', though.)
1445 const char *s = NULL;
1448 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1449 /* Do the mask check only if the args seem like aligned. */
1451 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1453 /* See if all the arguments are contiguous in memory. Note
1454 * that 'contiguous' is a loose term because some platforms
1455 * align the argv[] and the envp[]. If the arguments look
1456 * like non-aligned, assume that they are 'strictly' or
1457 * 'traditionally' contiguous. If the arguments look like
1458 * aligned, we just check that they are within aligned
1459 * PTRSIZE bytes. As long as no system has something bizarre
1460 * like the argv[] interleaved with some other data, we are
1461 * fine. (Did I just evoke Murphy's Law?) --jhi */
1462 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1464 for (i = 1; i < PL_origargc; i++) {
1465 if ((PL_origargv[i] == s + 1
1467 || PL_origargv[i] == s + 2
1472 (PL_origargv[i] > s &&
1474 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1484 /* Can we grab env area too to be used as the area for $0? */
1485 if (PL_origenviron) {
1486 if ((PL_origenviron[0] == s + 1
1488 || (PL_origenviron[0] == s + 9 && (s += 8))
1493 (PL_origenviron[0] > s &&
1494 PL_origenviron[0] <=
1495 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1499 s = PL_origenviron[0];
1502 my_setenv("NoNe SuCh", Nullch);
1503 /* Force copy of environment. */
1504 for (i = 1; PL_origenviron[i]; i++) {
1505 if (PL_origenviron[i] == s + 1
1508 (PL_origenviron[i] > s &&
1509 PL_origenviron[i] <=
1510 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1513 s = PL_origenviron[i];
1521 PL_origalen = s - PL_origargv[0] + 1;
1526 /* Come here if running an undumped a.out. */
1528 PL_origfilename = savepv(argv[0]);
1529 PL_do_undump = FALSE;
1530 cxstack_ix = -1; /* start label stack again */
1532 assert (!PL_tainted);
1534 S_set_caret_X(aTHX);
1536 init_postdump_symbols(argc,argv,env);
1541 op_free(PL_main_root);
1542 PL_main_root = Nullop;
1544 PL_main_start = Nullop;
1545 SvREFCNT_dec(PL_main_cv);
1546 PL_main_cv = Nullcv;
1549 oldscope = PL_scopestack_ix;
1550 PL_dowarn = G_WARN_OFF;
1555 parse_body(env,xsinit);
1557 call_list(oldscope, PL_checkav);
1564 /* my_exit() was called */
1565 while (PL_scopestack_ix > oldscope)
1568 PL_curstash = PL_defstash;
1570 call_list(oldscope, PL_checkav);
1574 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1583 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1586 int argc = PL_origargc;
1587 char **argv = PL_origargv;
1588 const char *scriptname = NULL;
1589 VOL bool dosearch = FALSE;
1590 const char *validarg = "";
1593 const char *cddir = Nullch;
1594 #ifdef USE_SITECUSTOMIZE
1595 bool minus_f = FALSE;
1600 sv_setpvn(PL_linestr,"",0);
1601 sv = newSVpvn("",0); /* first used for -I flags */
1605 for (argc--,argv++; argc > 0; argc--,argv++) {
1606 if (argv[0][0] != '-' || !argv[0][1])
1610 validarg = " PHOOEY ";
1614 * Can we rely on the kernel to start scripts with argv[1] set to
1615 * contain all #! line switches (the whole line)? (argv[0] is set to
1616 * the interpreter name, argv[2] to the script name; argv[3] and
1617 * above may contain other arguments.)
1624 #ifndef PERL_STRICT_CR
1649 if ((s = moreswitches(s)))
1654 CHECK_MALLOC_TOO_LATE_FOR('t');
1655 if( !PL_tainting ) {
1656 PL_taint_warn = TRUE;
1662 CHECK_MALLOC_TOO_LATE_FOR('T');
1664 PL_taint_warn = FALSE;
1669 #ifdef MACOS_TRADITIONAL
1670 /* ignore -e for Dev:Pseudo argument */
1671 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1676 PL_e_script = newSVpvn("",0);
1677 filter_add(read_e_script, NULL);
1680 sv_catpv(PL_e_script, s);
1682 sv_catpv(PL_e_script, argv[1]);
1686 Perl_croak(aTHX_ "No code specified for -e");
1687 sv_catpv(PL_e_script, "\n");
1691 #ifdef USE_SITECUSTOMIZE
1697 case 'I': /* -I handled both here and in moreswitches() */
1699 if (!*++s && (s=argv[1]) != Nullch) {
1703 STRLEN len = strlen(s);
1704 const char * const p = savepvn(s, len);
1705 incpush(p, TRUE, TRUE, FALSE, FALSE);
1706 sv_catpvn(sv, "-I", 2);
1707 sv_catpvn(sv, p, len);
1708 sv_catpvn(sv, " ", 1);
1712 Perl_croak(aTHX_ "No directory specified for -I");
1716 PL_preprocess = TRUE;
1729 PL_preambleav = newAV();
1730 av_push(PL_preambleav,
1731 newSVpv("use Config;",0));
1735 opts_prog = newSVpv("print Config::myconfig(),",0);
1737 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1739 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1741 opts = SvCUR(opts_prog);
1743 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1747 # ifdef DEBUG_LEAKING_SCALARS
1748 " DEBUG_LEAKING_SCALARS"
1750 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1751 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1753 # ifdef FAKE_THREADS
1756 # ifdef MULTIPLICITY
1765 # ifdef PERL_DONT_CREATE_GVSV
1766 " PERL_DONT_CREATE_GVSV"
1768 # ifdef PERL_GLOBAL_STRUCT
1769 " PERL_GLOBAL_STRUCT"
1771 # ifdef PERL_IMPLICIT_CONTEXT
1772 " PERL_IMPLICIT_CONTEXT"
1774 # ifdef PERL_IMPLICIT_SYS
1775 " PERL_IMPLICIT_SYS"
1777 # ifdef PERL_MALLOC_WRAP
1780 # ifdef PERL_NEED_APPCTX
1783 # ifdef PERL_NEED_TIMESBASE
1784 " PERL_NEED_TIMESBASE"
1786 # ifdef PERL_OLD_COPY_ON_WRITE
1787 " PERL_OLD_COPY_ON_WRITE"
1789 # ifdef PERL_USE_SAFE_PUTENV
1790 " PERL_USE_SAFE_PUTENV"
1792 #ifdef PERL_USES_PL_PIDSTATUS
1793 " PERL_USES_PL_PIDSTATUS"
1795 # ifdef PL_OP_SLAB_ALLOC
1798 # ifdef SPRINTF_RETURNS_STRLEN
1799 " SPRINTF_RETURNS_STRLEN"
1801 # ifdef THREADS_HAVE_PIDS
1802 " THREADS_HAVE_PIDS"
1804 # ifdef USE_5005THREADS
1807 # ifdef USE_64_BIT_ALL
1810 # ifdef USE_64_BIT_INT
1813 # ifdef USE_ITHREADS
1816 # ifdef USE_LARGE_FILES
1819 # ifdef USE_LONG_DOUBLE
1825 # ifdef USE_REENTRANT_API
1826 " USE_REENTRANT_API"
1831 # ifdef USE_SITECUSTOMIZE
1832 " USE_SITECUSTOMIZE"
1839 while (SvCUR(opts_prog) > opts+76) {
1840 /* find last space after "options: " and before col 76
1844 char * const pv = SvPV_nolen(opts_prog);
1845 const char c = pv[opts+76];
1847 space = strrchr(pv+opts+26, ' ');
1849 if (!space) break; /* "Can't happen" */
1851 /* break the line before that space */
1854 sv_insert(opts_prog, opts, 0,
1858 sv_catpv(opts_prog,"\\n\",");
1860 #if defined(LOCAL_PATCH_COUNT)
1861 if (LOCAL_PATCH_COUNT > 0) {
1864 "\" Locally applied patches:\\n\",");
1865 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1866 if (PL_localpatches[i])
1867 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1868 0, PL_localpatches[i], 0);
1872 Perl_sv_catpvf(aTHX_ opts_prog,
1873 "\" Built under %s\\n\"",OSNAME);
1876 Perl_sv_catpvf(aTHX_ opts_prog,
1877 ",\" Compiled at %s %s\\n\"",__DATE__,
1880 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1884 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1885 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1886 "sort grep {/^PERL/} keys %ENV; ");
1889 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1892 "print \" \\%ENV:\\n @env\\n\" if @env;"
1893 "print \" \\@INC:\\n @INC\\n\";");
1897 opts_prog = Perl_newSVpvf(aTHX_
1898 "Config::config_vars(qw%c%s%c)",
1902 av_push(PL_preambleav, opts_prog);
1903 /* don't look for script or read stdin */
1904 scriptname = BIT_BUCKET;
1908 PL_doextract = TRUE;
1916 if (!*++s || isSPACE(*s)) {
1920 /* catch use of gnu style long options */
1921 if (strEQ(s, "version")) {
1925 if (strEQ(s, "help")) {
1932 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1938 #ifndef SECURE_INTERNAL_GETENV
1941 (s = PerlEnv_getenv("PERL5OPT")))
1943 const char *popt = s;
1946 if (*s == '-' && *(s+1) == 'T') {
1947 CHECK_MALLOC_TOO_LATE_FOR('T');
1949 PL_taint_warn = FALSE;
1952 char *popt_copy = Nullch;
1965 if (!strchr("CDIMUdmtwA", *s))
1966 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1970 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1971 s = popt_copy + (s - popt);
1972 d = popt_copy + (d - popt);
1979 if( !PL_tainting ) {
1980 PL_taint_warn = TRUE;
1990 #ifdef USE_SITECUSTOMIZE
1993 PL_preambleav = newAV();
1994 av_unshift(PL_preambleav, 1);
1995 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1999 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2000 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2004 scriptname = argv[0];
2007 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2009 else if (scriptname == Nullch) {
2011 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2017 /* Set $^X early so that it can be used for relocatable paths in @INC */
2018 assert (!PL_tainted);
2020 S_set_caret_X(aTHX);
2024 open_script(scriptname,dosearch,sv);
2026 validate_suid(validarg, scriptname);
2029 #if defined(SIGCHLD) || defined(SIGCLD)
2032 # define SIGCHLD SIGCLD
2034 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2035 if (sigstate == (Sighandler_t) SIG_IGN) {
2036 if (ckWARN(WARN_SIGNAL))
2037 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2038 "Can't ignore signal CHLD, forcing to default");
2039 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2045 #ifdef MACOS_TRADITIONAL
2046 if (PL_doextract || gMacPerl_AlwaysExtract) {
2051 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2052 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2056 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2057 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2058 CvUNIQUE_on(PL_compcv);
2060 CvPADLIST(PL_compcv) = pad_new(0);
2061 #ifdef USE_5005THREADS
2062 CvOWNER(PL_compcv) = 0;
2063 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2064 MUTEX_INIT(CvMUTEXP(PL_compcv));
2065 #endif /* USE_5005THREADS */
2068 boot_core_UNIVERSAL();
2069 boot_core_xsutils();
2072 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2074 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2080 # ifdef HAS_SOCKS5_INIT
2081 socks5_init(argv[0]);
2087 init_predump_symbols();
2088 /* init_postdump_symbols not currently designed to be called */
2089 /* more than once (ENV isn't cleared first, for example) */
2090 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2092 init_postdump_symbols(argc,argv,env);
2094 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2095 * or explicitly in some platforms.
2096 * locale.c:Perl_init_i18nl10n() if the environment
2097 * look like the user wants to use UTF-8. */
2098 #if defined(__SYMBIAN32__)
2099 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2102 /* Requires init_predump_symbols(). */
2103 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2108 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2109 * and the default open disciplines. */
2110 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2111 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2113 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2114 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2115 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2117 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2118 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2119 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2121 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2122 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2123 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2124 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2125 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2128 sv_setpvn(sv, ":utf8\0:utf8", 11);
2130 sv_setpvn(sv, ":utf8\0", 6);
2133 sv_setpvn(sv, "\0:utf8", 6);
2139 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2140 if (strEQ(s, "unsafe"))
2141 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2142 else if (strEQ(s, "safe"))
2143 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2145 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2150 /* now parse the script */
2152 SETERRNO(0,SS_NORMAL);
2154 #ifdef MACOS_TRADITIONAL
2155 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2157 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2159 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2160 MacPerl_MPWFileName(PL_origfilename));
2164 if (yyparse() || PL_error_count) {
2166 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2168 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2173 CopLINE_set(PL_curcop, 0);
2174 PL_curstash = PL_defstash;
2175 PL_preprocess = FALSE;
2177 SvREFCNT_dec(PL_e_script);
2178 PL_e_script = Nullsv;
2185 SAVECOPFILE(PL_curcop);
2186 SAVECOPLINE(PL_curcop);
2187 gv_check(PL_defstash);
2194 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2195 dump_mstats("after compilation:");
2204 =for apidoc perl_run
2206 Tells a Perl interpreter to run. See L<perlembed>.
2218 PERL_UNUSED_ARG(my_perl);
2220 oldscope = PL_scopestack_ix;
2228 cxstack_ix = -1; /* start context stack again */
2230 case 0: /* normal completion */
2234 case 2: /* my_exit() */
2235 while (PL_scopestack_ix > oldscope)
2238 PL_curstash = PL_defstash;
2239 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2240 PL_endav && !PL_minus_c)
2241 call_list(oldscope, PL_endav);
2243 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2244 dump_mstats("after execution: ");
2250 POPSTACK_TO(PL_mainstack);
2253 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2265 S_run_body(pTHX_ I32 oldscope)
2267 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2268 PL_sawampersand ? "Enabling" : "Omitting"));
2270 if (!PL_restartop) {
2271 DEBUG_x(dump_all());
2274 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2276 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2280 #ifdef MACOS_TRADITIONAL
2281 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2282 (gMacPerl_ErrorFormat ? "# " : ""),
2283 MacPerl_MPWFileName(PL_origfilename));
2285 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2289 if (PERLDB_SINGLE && PL_DBsingle)
2290 sv_setiv(PL_DBsingle, 1);
2292 call_list(oldscope, PL_initav);
2298 PL_op = PL_restartop;
2302 else if (PL_main_start) {
2303 CvDEPTH(PL_main_cv) = 1;
2304 PL_op = PL_main_start;
2312 =head1 SV Manipulation Functions
2314 =for apidoc p||get_sv
2316 Returns the SV of the specified Perl scalar. If C<create> is set and the
2317 Perl variable does not exist then it will be created. If C<create> is not
2318 set and the variable does not exist then NULL is returned.
2324 Perl_get_sv(pTHX_ const char *name, I32 create)
2327 #ifdef USE_5005THREADS
2328 if (name[1] == '\0' && !isALPHA(name[0])) {
2329 PADOFFSET tmp = find_threadsv(name);
2330 if (tmp != NOT_IN_PAD)
2331 return THREADSV(tmp);
2333 #endif /* USE_5005THREADS */
2334 gv = gv_fetchpv(name, create, SVt_PV);
2341 =head1 Array Manipulation Functions
2343 =for apidoc p||get_av
2345 Returns the AV of the specified Perl array. If C<create> is set and the
2346 Perl variable does not exist then it will be created. If C<create> is not
2347 set and the variable does not exist then NULL is returned.
2353 Perl_get_av(pTHX_ const char *name, I32 create)
2355 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2364 =head1 Hash Manipulation Functions
2366 =for apidoc p||get_hv
2368 Returns the HV of the specified Perl hash. If C<create> is set and the
2369 Perl variable does not exist then it will be created. If C<create> is not
2370 set and the variable does not exist then NULL is returned.
2376 Perl_get_hv(pTHX_ const char *name, I32 create)
2378 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2387 =head1 CV Manipulation Functions
2389 =for apidoc p||get_cv
2391 Returns the CV of the specified Perl subroutine. If C<create> is set and
2392 the Perl subroutine does not exist then it will be declared (which has the
2393 same effect as saying C<sub name;>). If C<create> is not set and the
2394 subroutine does not exist then NULL is returned.
2400 Perl_get_cv(pTHX_ const char *name, I32 create)
2402 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2403 /* XXX unsafe for threads if eval_owner isn't held */
2404 /* XXX this is probably not what they think they're getting.
2405 * It has the same effect as "sub name;", i.e. just a forward
2407 if (create && !GvCVu(gv))
2408 return newSUB(start_subparse(FALSE, 0),
2409 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2417 /* Be sure to refetch the stack pointer after calling these routines. */
2421 =head1 Callback Functions
2423 =for apidoc p||call_argv
2425 Performs a callback to the specified Perl sub. See L<perlcall>.
2431 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2433 /* See G_* flags in cop.h */
2434 /* null terminated arg list */
2441 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2446 return call_pv(sub_name, flags);
2450 =for apidoc p||call_pv
2452 Performs a callback to the specified Perl sub. See L<perlcall>.
2458 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2459 /* name of the subroutine */
2460 /* See G_* flags in cop.h */
2462 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2466 =for apidoc p||call_method
2468 Performs a callback to the specified Perl method. The blessed object must
2469 be on the stack. See L<perlcall>.
2475 Perl_call_method(pTHX_ const char *methname, I32 flags)
2476 /* name of the subroutine */
2477 /* See G_* flags in cop.h */
2479 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2482 /* May be called with any of a CV, a GV, or an SV containing the name. */
2484 =for apidoc p||call_sv
2486 Performs a callback to the Perl sub whose name is in the SV. See
2493 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2494 /* See G_* flags in cop.h */
2497 LOGOP myop; /* fake syntax tree node */
2500 volatile I32 retval = 0;
2502 bool oldcatch = CATCH_GET;
2504 OP* const oldop = PL_op;
2507 if (flags & G_DISCARD) {
2512 Zero(&myop, 1, LOGOP);
2513 myop.op_next = Nullop;
2514 if (!(flags & G_NOARGS))
2515 myop.op_flags |= OPf_STACKED;
2516 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2517 (flags & G_ARRAY) ? OPf_WANT_LIST :
2522 EXTEND(PL_stack_sp, 1);
2523 *++PL_stack_sp = sv;
2525 oldscope = PL_scopestack_ix;
2527 if (PERLDB_SUB && PL_curstash != PL_debstash
2528 /* Handle first BEGIN of -d. */
2529 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2530 /* Try harder, since this may have been a sighandler, thus
2531 * curstash may be meaningless. */
2532 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2533 && !(flags & G_NODEBUG))
2534 PL_op->op_private |= OPpENTERSUB_DB;
2536 if (flags & G_METHOD) {
2537 Zero(&method_op, 1, UNOP);
2538 method_op.op_next = PL_op;
2539 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2540 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2541 PL_op = (OP*)&method_op;
2544 if (!(flags & G_EVAL)) {
2546 call_body((OP*)&myop, FALSE);
2547 retval = PL_stack_sp - (PL_stack_base + oldmark);
2548 CATCH_SET(oldcatch);
2551 myop.op_other = (OP*)&myop;
2553 /* we're trying to emulate pp_entertry() here */
2555 register PERL_CONTEXT *cx;
2556 const I32 gimme = GIMME_V;
2561 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2563 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2565 PL_in_eval = EVAL_INEVAL;
2566 if (flags & G_KEEPERR)
2567 PL_in_eval |= EVAL_KEEPERR;
2569 sv_setpvn(ERRSV,"",0);
2577 call_body((OP*)&myop, FALSE);
2578 retval = PL_stack_sp - (PL_stack_base + oldmark);
2579 if (!(flags & G_KEEPERR))
2580 sv_setpvn(ERRSV,"",0);
2586 /* my_exit() was called */
2587 PL_curstash = PL_defstash;
2590 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2591 Perl_croak(aTHX_ "Callback called exit");
2596 PL_op = PL_restartop;
2600 PL_stack_sp = PL_stack_base + oldmark;
2601 if (flags & G_ARRAY)
2605 *++PL_stack_sp = &PL_sv_undef;
2610 if (PL_scopestack_ix > oldscope) {
2614 register PERL_CONTEXT *cx;
2621 PERL_UNUSED_VAR(newsp);
2622 PERL_UNUSED_VAR(gimme);
2623 PERL_UNUSED_VAR(optype);
2628 if (flags & G_DISCARD) {
2629 PL_stack_sp = PL_stack_base + oldmark;
2639 S_call_body(pTHX_ const OP *myop, bool is_eval)
2641 if (PL_op == myop) {
2643 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2645 PL_op = Perl_pp_entersub(aTHX); /* this does */
2651 /* Eval a string. The G_EVAL flag is always assumed. */
2654 =for apidoc p||eval_sv
2656 Tells Perl to C<eval> the string in the SV.
2662 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2664 /* See G_* flags in cop.h */
2667 UNOP myop; /* fake syntax tree node */
2668 volatile I32 oldmark = SP - PL_stack_base;
2669 volatile I32 retval = 0;
2671 OP* const oldop = PL_op;
2674 if (flags & G_DISCARD) {
2681 Zero(PL_op, 1, UNOP);
2682 EXTEND(PL_stack_sp, 1);
2683 *++PL_stack_sp = sv;
2685 if (!(flags & G_NOARGS))
2686 myop.op_flags = OPf_STACKED;
2687 myop.op_next = Nullop;
2688 myop.op_type = OP_ENTEREVAL;
2689 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2690 (flags & G_ARRAY) ? OPf_WANT_LIST :
2692 if (flags & G_KEEPERR)
2693 myop.op_flags |= OPf_SPECIAL;
2695 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2696 * before a PUSHEVAL, which corrupts the stack after a croak */
2697 TAINT_PROPER("eval_sv()");
2703 call_body((OP*)&myop,TRUE);
2704 retval = PL_stack_sp - (PL_stack_base + oldmark);
2705 if (!(flags & G_KEEPERR))
2706 sv_setpvn(ERRSV,"",0);
2712 /* my_exit() was called */
2713 PL_curstash = PL_defstash;
2716 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2717 Perl_croak(aTHX_ "Callback called exit");
2722 PL_op = PL_restartop;
2726 PL_stack_sp = PL_stack_base + oldmark;
2727 if (flags & G_ARRAY)
2731 *++PL_stack_sp = &PL_sv_undef;
2737 if (flags & G_DISCARD) {
2738 PL_stack_sp = PL_stack_base + oldmark;
2748 =for apidoc p||eval_pv
2750 Tells Perl to C<eval> the given string and return an SV* result.
2756 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2759 SV* sv = newSVpv(p, 0);
2761 eval_sv(sv, G_SCALAR);
2768 if (croak_on_error && SvTRUE(ERRSV)) {
2769 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2775 /* Require a module. */
2778 =head1 Embedding Functions
2780 =for apidoc p||require_pv
2782 Tells Perl to C<require> the file named by the string argument. It is
2783 analogous to the Perl code C<eval "require '$file'">. It's even
2784 implemented that way; consider using load_module instead.
2789 Perl_require_pv(pTHX_ const char *pv)
2793 PUSHSTACKi(PERLSI_REQUIRE);
2795 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2796 eval_sv(sv_2mortal(sv), G_DISCARD);
2802 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2804 register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV);
2807 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2811 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2813 /* This message really ought to be max 23 lines.
2814 * Removed -h because the user already knows that option. Others? */
2816 static const char * const usage_msg[] = {
2817 "-0[octal] specify record separator (\\0, if no argument)",
2818 "-A[mod][=pattern] activate all/given assertions",
2819 "-a autosplit mode with -n or -p (splits $_ into @F)",
2820 "-C[number/list] enables the listed Unicode features",
2821 "-c check syntax only (runs BEGIN and CHECK blocks)",
2822 "-d[:debugger] run program under debugger",
2823 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2824 "-e program one line of program (several -e's allowed, omit programfile)",
2825 "-f don't do $sitelib/sitecustomize.pl at startup",
2826 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2827 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2828 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2829 "-l[octal] enable line ending processing, specifies line terminator",
2830 "-[mM][-]module execute \"use/no module...\" before executing program",
2831 "-n assume \"while (<>) { ... }\" loop around program",
2832 "-p assume loop like -n but print line also, like sed",
2833 "-P run program through C preprocessor before compilation",
2834 "-s enable rudimentary parsing for switches after programfile",
2835 "-S look for programfile using PATH environment variable",
2836 "-t enable tainting warnings",
2837 "-T enable tainting checks",
2838 "-u dump core after parsing program",
2839 "-U allow unsafe operations",
2840 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2841 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2842 "-w enable many useful warnings (RECOMMENDED)",
2843 "-W enable all warnings",
2844 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2845 "-X disable all warnings",
2849 const char * const *p = usage_msg;
2851 PerlIO_printf(PerlIO_stdout(),
2852 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2855 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2858 /* convert a string of -D options (or digits) into an int.
2859 * sets *s to point to the char after the options */
2863 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2865 static const char * const usage_msgd[] = {
2866 " Debugging flag values: (see also -d)",
2867 " p Tokenizing and parsing (with v, displays parse stack)",
2868 " s Stack snapshots (with v, displays all stacks)",
2869 " l Context (loop) stack processing",
2870 " t Trace execution",
2871 " o Method and overloading resolution",
2872 " c String/numeric conversions",
2873 " P Print profiling info, preprocessor command for -P, source file input state",
2874 " m Memory allocation",
2875 " f Format processing",
2876 " r Regular expression parsing and execution",
2877 " x Syntax tree dump",
2878 " u Tainting checks",
2879 " H Hash dump -- usurps values()",
2880 " X Scratchpad allocation",
2882 " S Thread synchronization",
2884 " R Include reference counts of dumped variables (eg when using -Ds)",
2885 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2886 " v Verbose: use in conjunction with other flags",
2888 " A Consistency checks on internal structures",
2889 " q quiet - currently only suppresses the 'EXECUTING' message",
2894 /* if adding extra options, remember to update DEBUG_MASK */
2895 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2897 for (; isALNUM(**s); (*s)++) {
2898 const char * const d = strchr(debopts,**s);
2900 i |= 1 << (d - debopts);
2901 else if (ckWARN_d(WARN_DEBUGGING))
2902 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2903 "invalid option -D%c, use -D'' to see choices\n", **s);
2906 else if (isDIGIT(**s)) {
2908 for (; isALNUM(**s); (*s)++) ;
2910 else if (givehelp) {
2911 const char *const *p = usage_msgd;
2912 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2915 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2916 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2917 "-Dp not implemented on this platform\n");
2923 /* This routine handles any switches that can be given during run */
2926 Perl_moreswitches(pTHX_ char *s)
2937 SvREFCNT_dec(PL_rs);
2938 if (s[1] == 'x' && s[2]) {
2939 const char *e = s+=2;
2945 flags = PERL_SCAN_SILENT_ILLDIGIT;
2946 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2947 if (s + numlen < e) {
2948 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2952 PL_rs = newSVpvn("", 0);
2953 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2954 tmps = (U8*)SvPVX(PL_rs);
2955 uvchr_to_utf8(tmps, rschar);
2956 SvCUR_set(PL_rs, UNISKIP(rschar));
2961 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2962 if (rschar & ~((U8)~0))
2963 PL_rs = &PL_sv_undef;
2964 else if (!rschar && numlen >= 2)
2965 PL_rs = newSVpvn("", 0);
2967 char ch = (char)rschar;
2968 PL_rs = newSVpvn(&ch, 1);
2971 sv_setsv(get_sv("/", TRUE), PL_rs);
2976 PL_unicode = parse_unicode_opts( (const char **)&s );
2981 while (*s && !isSPACE(*s)) ++s;
2983 PL_splitstr = savepv(PL_splitstr);
2997 /* -dt indicates to the debugger that threads will be used */
2998 if (*s == 't' && !isALNUM(s[1])) {
3000 my_setenv("PERL5DB_THREADED", "1");
3003 /* The following permits -d:Mod to accepts arguments following an =
3004 in the fashion that -MSome::Mod does. */
3005 if (*s == ':' || *s == '=') {
3007 SV * const sv = newSVpv("use Devel::", 0);
3009 /* We now allow -d:Module=Foo,Bar */
3010 while(isALNUM(*s) || *s==':') ++s;
3012 sv_catpv(sv, start);
3014 sv_catpvn(sv, start, s-start);
3015 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3018 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3021 PL_perldb = PERLDB_ALL;
3030 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3031 #else /* !DEBUGGING */
3032 if (ckWARN_d(WARN_DEBUGGING))
3033 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3034 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3035 for (s++; isALNUM(*s); s++) ;
3040 usage(PL_origargv[0]);
3043 Safefree(PL_inplace);
3044 #if defined(__CYGWIN__) /* do backup extension automagically */
3045 if (*(s+1) == '\0') {
3046 PL_inplace = savepv(".bak");
3049 #endif /* __CYGWIN__ */
3050 PL_inplace = savepv(s+1);
3051 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3055 if (*s == '-') /* Additional switches on #! line. */
3059 case 'I': /* -I handled both here and in parse_body() */
3062 while (*s && isSPACE(*s))
3067 /* ignore trailing spaces (possibly followed by other switches) */
3069 for (e = p; *e && !isSPACE(*e); e++) ;
3073 } while (*p && *p != '-');
3074 e = savepvn(s, e-s);
3075 incpush(e, TRUE, TRUE, FALSE, FALSE);
3082 Perl_croak(aTHX_ "No directory specified for -I");
3088 SvREFCNT_dec(PL_ors_sv);
3094 PL_ors_sv = newSVpvn("\n",1);
3095 numlen = 3 + (*s == '0');
3096 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3100 if (RsPARA(PL_rs)) {
3101 PL_ors_sv = newSVpvn("\n\n",2);
3104 PL_ors_sv = newSVsv(PL_rs);
3111 PL_preambleav = newAV();
3114 char * const start = s;
3115 SV * const sv = newSVpv("use assertions::activate", 24);
3116 while(isALNUM(*s) || *s == ':') ++s;
3118 sv_catpvn(sv, "::", 2);
3119 sv_catpvn(sv, start, s-start);
3122 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3125 else if (*s != '\0') {
3126 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3128 av_push(PL_preambleav, sv);
3132 forbid_setid("-M"); /* XXX ? */
3135 forbid_setid("-m"); /* XXX ? */
3139 const char *use = "use ";
3140 /* -M-foo == 'no foo' */
3141 /* Leading space on " no " is deliberate, to make both
3142 possibilities the same length. */
3143 if (*s == '-') { use = " no "; ++s; }
3144 sv = newSVpvn(use,4);
3146 /* We allow -M'Module qw(Foo Bar)' */
3147 while(isALNUM(*s) || *s==':') ++s;
3149 sv_catpv(sv, start);
3150 if (*(start-1) == 'm') {
3152 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3153 sv_catpv( sv, " ()");
3157 Perl_croak(aTHX_ "Module name required with -%c option",
3159 sv_catpvn(sv, start, s-start);
3160 sv_catpv(sv, " split(/,/,q");
3161 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3163 sv_catpvn(sv, "\0)", 2);
3167 PL_preambleav = newAV();
3168 av_push(PL_preambleav, sv);
3171 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3183 PL_doswitches = TRUE;
3197 #ifdef MACOS_TRADITIONAL
3198 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3200 PL_do_undump = TRUE;
3208 if (!sv_derived_from(PL_patchlevel, "version"))
3209 (void *)upg_version(PL_patchlevel);
3211 PerlIO_printf(PerlIO_stdout(),
3212 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3213 vstringify(PL_patchlevel),
3216 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3217 PerlIO_printf(PerlIO_stdout(),
3218 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3219 vstringify(PL_patchlevel)));
3220 PerlIO_printf(PerlIO_stdout(),
3221 Perl_form(aTHX_ " built under %s at %s %s\n",
3222 OSNAME, __DATE__, __TIME__));
3223 PerlIO_printf(PerlIO_stdout(),
3224 Perl_form(aTHX_ " OS Specific Release: %s\n",
3228 #if defined(LOCAL_PATCH_COUNT)
3229 if (LOCAL_PATCH_COUNT > 0)
3230 PerlIO_printf(PerlIO_stdout(),
3231 "\n(with %d registered patch%s, "
3232 "see perl -V for more detail)",
3233 (int)LOCAL_PATCH_COUNT,
3234 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3237 PerlIO_printf(PerlIO_stdout(),
3238 "\n\nCopyright 1987-2005, Larry Wall\n");
3239 #ifdef MACOS_TRADITIONAL
3240 PerlIO_printf(PerlIO_stdout(),
3241 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3242 "maintained by Chris Nandor\n");
3245 PerlIO_printf(PerlIO_stdout(),
3246 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3249 PerlIO_printf(PerlIO_stdout(),
3250 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3251 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3256 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "atariST series port, ++jrb bammi@cadence.com\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "MiNT port by Guido Flohr, 1997-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "EPOC port by Olaf Flebbe, 1999-2002\n");
3295 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3296 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3299 #ifdef __SYMBIAN32__
3300 PerlIO_printf(PerlIO_stdout(),
3301 "Symbian port by Nokia, 2004-2005\n");
3303 #ifdef BINARY_BUILD_NOTICE
3304 BINARY_BUILD_NOTICE;
3306 PerlIO_printf(PerlIO_stdout(),
3308 Perl may be copied only under the terms of either the Artistic License or the\n\
3309 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3310 Complete documentation for Perl, including FAQ lists, should be found on\n\
3311 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3312 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3315 if (! (PL_dowarn & G_WARN_ALL_MASK))
3316 PL_dowarn |= G_WARN_ON;
3320 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3321 if (!specialWARN(PL_compiling.cop_warnings))
3322 SvREFCNT_dec(PL_compiling.cop_warnings);
3323 PL_compiling.cop_warnings = pWARN_ALL ;
3327 PL_dowarn = G_WARN_ALL_OFF;
3328 if (!specialWARN(PL_compiling.cop_warnings))
3329 SvREFCNT_dec(PL_compiling.cop_warnings);
3330 PL_compiling.cop_warnings = pWARN_NONE ;
3335 if (s[1] == '-') /* Additional switches on #! line. */
3340 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3346 #ifdef ALTERNATE_SHEBANG
3347 case 'S': /* OS/2 needs -S on "extproc" line. */
3355 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3360 /* compliments of Tom Christiansen */
3362 /* unexec() can be found in the Gnu emacs distribution */
3363 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3366 Perl_my_unexec(pTHX)
3374 prog = newSVpv(BIN_EXP, 0);
3375 sv_catpv(prog, "/perl");
3376 file = newSVpv(PL_origfilename, 0);
3377 sv_catpv(file, ".perldump");
3379 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3380 /* unexec prints msg to stderr in case of failure */
3381 PerlProc_exit(status);
3384 # include <lib$routines.h>
3385 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3387 ABORT(); /* for use with undump */
3392 /* initialize curinterp */
3398 # define PERLVAR(var,type)
3399 # define PERLVARA(var,n,type)
3400 # if defined(PERL_IMPLICIT_CONTEXT)
3401 # if defined(USE_5005THREADS)
3402 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3403 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3404 # else /* !USE_5005THREADS */
3405 # define PERLVARI(var,type,init) aTHX->var = init;
3406 # define PERLVARIC(var,type,init) aTHX->var = init;
3407 # endif /* USE_5005THREADS */
3409 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3410 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3412 # include "intrpvar.h"
3413 # ifndef USE_5005THREADS
3414 # include "thrdvar.h"
3421 # define PERLVAR(var,type)
3422 # define PERLVARA(var,n,type)
3423 # define PERLVARI(var,type,init) PL_##var = init;
3424 # define PERLVARIC(var,type,init) PL_##var = init;
3425 # include "intrpvar.h"
3426 # ifndef USE_5005THREADS
3427 # include "thrdvar.h"
3438 S_init_main_stash(pTHX)
3442 PL_curstash = PL_defstash = newHV();
3443 PL_curstname = newSVpvn("main",4);
3444 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3445 SvREFCNT_dec(GvHV(gv));
3446 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3448 hv_name_set(PL_defstash, "main", 4, 0);
3449 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3450 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3451 GvMULTI_on(PL_incgv);
3452 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3453 GvMULTI_on(PL_hintgv);
3454 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3455 SvREFCNT_inc(PL_defgv);
3456 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3457 SvREFCNT_inc(PL_errgv);
3458 GvMULTI_on(PL_errgv);
3459 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3460 GvMULTI_on(PL_replgv);
3461 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3462 #ifdef PERL_DONT_CREATE_GVSV
3465 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3466 sv_setpvn(ERRSV, "", 0);
3467 PL_curstash = PL_defstash;
3468 CopSTASH_set(&PL_compiling, PL_defstash);
3469 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3470 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3471 /* We must init $/ before switches are processed. */
3472 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3475 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3477 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3482 const char *cpp_discard_flag;
3491 PL_origfilename = savepvn("-e", 2);
3494 /* if find_script() returns, it returns a malloc()-ed value */
3495 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3497 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3498 const char *s = scriptname + 8;
3499 PL_fdscript = atoi(s);
3504 * Tell apart "normal" usage of fdscript, e.g.
3505 * with bash on FreeBSD:
3506 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3507 * from usage in suidperl.
3508 * Does any "normal" usage leave garbage after the number???
3509 * Is it a mistake to use a similar /dev/fd/ construct for
3514 * Be supersafe and do some sanity-checks.
3515 * Still, can we be sure we got the right thing?
3518 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3521 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3523 scriptname = savepv(s + 1);
3524 Safefree(PL_origfilename);
3525 PL_origfilename = (char *)scriptname;
3530 CopFILE_free(PL_curcop);
3531 CopFILE_set(PL_curcop, PL_origfilename);
3532 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3533 scriptname = (char *)"";
3534 if (PL_fdscript >= 0) {
3535 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3536 # if defined(HAS_FCNTL) && defined(F_SETFD)
3538 /* ensure close-on-exec */
3539 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3544 Perl_croak(aTHX_ "sperl needs fd script\n"
3545 "You should not call sperl directly; do you need to "
3546 "change a #! line\nfrom sperl to perl?\n");
3549 * Do not open (or do other fancy stuff) while setuid.
3550 * Perl does the open, and hands script to suidperl on a fd;
3551 * suidperl only does some checks, sets up UIDs and re-execs
3552 * perl with that fd as it has always done.
3555 if (PL_suidscript != 1) {
3556 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3559 else if (PL_preprocess) {
3560 const char * const cpp_cfg = CPPSTDIN;
3561 SV * const cpp = newSVpvn("",0);
3562 SV * const cmd = NEWSV(0,0);
3564 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3565 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3566 if (strEQ(cpp_cfg, "cppstdin"))
3567 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3568 sv_catpv(cpp, cpp_cfg);
3571 sv_catpvn(sv, "-I", 2);
3572 sv_catpv(sv,PRIVLIB_EXP);
3575 DEBUG_P(PerlIO_printf(Perl_debug_log,
3576 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3577 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3580 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3587 cpp_discard_flag = "";
3589 cpp_discard_flag = "-C";
3593 perl = os2_execname(aTHX);
3595 perl = PL_origargv[0];
3599 /* This strips off Perl comments which might interfere with
3600 the C pre-processor, including #!. #line directives are
3601 deliberately stripped to avoid confusion with Perl's version
3602 of #line. FWP played some golf with it so it will fit
3603 into VMS's 255 character buffer.
3606 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3608 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3610 Perl_sv_setpvf(aTHX_ cmd, "\
3611 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3612 perl, quote, code, quote, scriptname, cpp,
3613 cpp_discard_flag, sv, CPPMINUS);
3615 PL_doextract = FALSE;
3617 DEBUG_P(PerlIO_printf(Perl_debug_log,
3618 "PL_preprocess: cmd=\"%s\"\n",
3621 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3625 else if (!*scriptname) {
3626 forbid_setid("program input from stdin");
3627 PL_rsfp = PerlIO_stdin();
3630 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3631 # if defined(HAS_FCNTL) && defined(F_SETFD)
3633 /* ensure close-on-exec */
3634 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3637 #endif /* IAMSUID */
3639 /* PSz 16 Sep 03 Keep neat error message */
3641 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3643 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3644 CopFILE(PL_curcop), Strerror(errno));
3649 * I_SYSSTATVFS HAS_FSTATVFS
3651 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3652 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3653 * here so that metaconfig picks them up. */
3657 S_fd_on_nosuid_fs(pTHX_ int fd)
3660 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3661 * but is needed also on machines without setreuid.
3662 * Seems safe enough to run as root.
3664 int check_okay = 0; /* able to do all the required sys/libcalls */
3665 int on_nosuid = 0; /* the fd is on a nosuid fs */
3667 * Need to check noexec also: nosuid might not be set, the average
3668 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3670 int on_noexec = 0; /* the fd is on a noexec fs */
3673 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3674 * fstatvfs() is UNIX98.
3675 * fstatfs() is 4.3 BSD.
3676 * ustat()+getmnt() is pre-4.3 BSD.
3677 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3678 * an irrelevant filesystem while trying to reach the right one.
3681 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3683 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3684 defined(HAS_FSTATVFS)
3685 # define FD_ON_NOSUID_CHECK_OKAY
3686 struct statvfs stfs;
3688 check_okay = fstatvfs(fd, &stfs) == 0;
3689 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3691 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3692 on platforms where it is present. */
3693 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3695 # endif /* fstatvfs */
3697 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3698 defined(PERL_MOUNT_NOSUID) && \
3699 defined(PERL_MOUNT_NOEXEC) && \
3700 defined(HAS_FSTATFS) && \
3701 defined(HAS_STRUCT_STATFS) && \
3702 defined(HAS_STRUCT_STATFS_F_FLAGS)
3703 # define FD_ON_NOSUID_CHECK_OKAY
3706 check_okay = fstatfs(fd, &stfs) == 0;
3707 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3708 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3709 # endif /* fstatfs */
3711 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3712 defined(PERL_MOUNT_NOSUID) && \
3713 defined(PERL_MOUNT_NOEXEC) && \
3714 defined(HAS_FSTAT) && \
3715 defined(HAS_USTAT) && \
3716 defined(HAS_GETMNT) && \
3717 defined(HAS_STRUCT_FS_DATA) && \
3719 # define FD_ON_NOSUID_CHECK_OKAY
3722 if (fstat(fd, &fdst) == 0) {
3724 if (ustat(fdst.st_dev, &us) == 0) {
3726 /* NOSTAT_ONE here because we're not examining fields which
3727 * vary between that case and STAT_ONE. */
3728 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3729 size_t cmplen = sizeof(us.f_fname);
3730 if (sizeof(fsd.fd_req.path) < cmplen)
3731 cmplen = sizeof(fsd.fd_req.path);
3732 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3733 fdst.st_dev == fsd.fd_req.dev) {
3735 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3736 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3741 # endif /* fstat+ustat+getmnt */
3743 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3744 defined(HAS_GETMNTENT) && \
3745 defined(HAS_HASMNTOPT) && \
3746 defined(MNTOPT_NOSUID) && \
3747 defined(MNTOPT_NOEXEC)
3748 # define FD_ON_NOSUID_CHECK_OKAY
3749 FILE *mtab = fopen("/etc/mtab", "r");
3750 struct mntent *entry;
3753 if (mtab && (fstat(fd, &stb) == 0)) {
3754 while (entry = getmntent(mtab)) {
3755 if (stat(entry->mnt_dir, &fsb) == 0
3756 && fsb.st_dev == stb.st_dev)
3758 /* found the filesystem */
3760 if (hasmntopt(entry, MNTOPT_NOSUID))
3762 if (hasmntopt(entry, MNTOPT_NOEXEC))
3765 } /* A single fs may well fail its stat(). */
3770 # endif /* getmntent+hasmntopt */
3773 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3775 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3777 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3778 return ((!check_okay) || on_nosuid || on_noexec);
3780 #endif /* IAMSUID */
3783 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3788 #endif /* IAMSUID */
3790 /* do we need to emulate setuid on scripts? */
3792 /* This code is for those BSD systems that have setuid #! scripts disabled
3793 * in the kernel because of a security problem. Merely defining DOSUID
3794 * in perl will not fix that problem, but if you have disabled setuid
3795 * scripts in the kernel, this will attempt to emulate setuid and setgid
3796 * on scripts that have those now-otherwise-useless bits set. The setuid
3797 * root version must be called suidperl or sperlN.NNN. If regular perl
3798 * discovers that it has opened a setuid script, it calls suidperl with
3799 * the same argv that it had. If suidperl finds that the script it has
3800 * just opened is NOT setuid root, it sets the effective uid back to the
3801 * uid. We don't just make perl setuid root because that loses the
3802 * effective uid we had before invoking perl, if it was different from the
3805 * Description/comments above do not match current workings:
3806 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3807 * suidperl called with script open and name changed to /dev/fd/N/X;
3808 * suidperl croaks if script is not setuid;
3809 * making perl setuid would be a huge security risk (and yes, that
3810 * would lose any euid we might have had).
3812 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3813 * be defined in suidperl only. suidperl must be setuid root. The
3814 * Configure script will set this up for you if you want it.
3820 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3821 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3822 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3824 const char *linestr;
3828 if (PL_fdscript < 0 || PL_suidscript != 1)
3829 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3831 * Since the script is opened by perl, not suidperl, some of these
3832 * checks are superfluous. Leaving them in probably does not lower
3836 * Do checks even for systems with no HAS_SETREUID.
3837 * We used to swap, then re-swap UIDs with
3839 if (setreuid(PL_euid,PL_uid) < 0
3840 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3841 Perl_croak(aTHX_ "Can't swap uid and euid");
3844 if (setreuid(PL_uid,PL_euid) < 0
3845 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3846 Perl_croak(aTHX_ "Can't reswap uid and euid");
3850 /* On this access check to make sure the directories are readable,
3851 * there is actually a small window that the user could use to make
3852 * filename point to an accessible directory. So there is a faint
3853 * chance that someone could execute a setuid script down in a
3854 * non-accessible directory. I don't know what to do about that.
3855 * But I don't think it's too important. The manual lies when
3856 * it says access() is useful in setuid programs.
3858 * So, access() is pretty useless... but not harmful... do anyway.
3860 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3861 Perl_croak(aTHX_ "Can't access() script\n");
3864 /* If we can swap euid and uid, then we can determine access rights
3865 * with a simple stat of the file, and then compare device and
3866 * inode to make sure we did stat() on the same file we opened.
3867 * Then we just have to make sure he or she can execute it.
3870 * As the script is opened by perl, not suidperl, we do not need to
3871 * care much about access rights.
3873 * The 'script changed' check is needed, or we can get lied to
3874 * about $0 with e.g.
3875 * suidperl /dev/fd/4//bin/x 4<setuidscript
3876 * Without HAS_SETREUID, is it safe to stat() as root?
3878 * Are there any operating systems that pass /dev/fd/xxx for setuid
3879 * scripts, as suggested/described in perlsec(1)? Surely they do not
3880 * pass the script name as we do, so the "script changed" test would
3881 * fail for them... but we never get here with
3882 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3884 * This is one place where we must "lie" about return status: not
3885 * say if the stat() failed. We are doing this as root, and could
3886 * be tricked into reporting existence or not of files that the
3887 * "plain" user cannot even see.
3891 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3892 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3893 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3894 Perl_croak(aTHX_ "Setuid script changed\n");
3898 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3899 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3902 * We used to do this check as the "plain" user (after swapping
3903 * UIDs). But the check for nosuid and noexec filesystem is needed,
3904 * and should be done even without HAS_SETREUID. (Maybe those
3905 * operating systems do not have such mount options anyway...)
3906 * Seems safe enough to do as root.
3908 #if !defined(NO_NOSUID_CHECK)
3909 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3910 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3913 #endif /* IAMSUID */
3915 if (!S_ISREG(PL_statbuf.st_mode)) {
3916 Perl_croak(aTHX_ "Setuid script not plain file\n");
3918 if (PL_statbuf.st_mode & S_IWOTH)
3919 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3920 PL_doswitches = FALSE; /* -s is insecure in suid */
3921 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3922 CopLINE_inc(PL_curcop);
3923 linestr = SvPV_nolen_const(PL_linestr);
3924 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3925 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3926 Perl_croak(aTHX_ "No #! line");
3930 /* Sanity check on line length */
3931 s_end = s + strlen(s);
3932 if (s_end == s || (s_end - s) > 4000)
3933 Perl_croak(aTHX_ "Very long #! line");
3934 /* Allow more than a single space after #! */
3935 while (isSPACE(*s)) s++;
3936 /* Sanity check on buffer end */
3937 while ((*s) && !isSPACE(*s)) s++;
3938 for (s2 = s; (s2 > linestr &&
3939 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3940 || s2[-1] == '-')); s2--) ;
3941 /* Sanity check on buffer start */
3942 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3943 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3944 Perl_croak(aTHX_ "Not a perl script");
3945 while (*s == ' ' || *s == '\t') s++;
3947 * #! arg must be what we saw above. They can invoke it by
3948 * mentioning suidperl explicitly, but they may not add any strange
3949 * arguments beyond what #! says if they do invoke suidperl that way.
3952 * The way validarg was set up, we rely on the kernel to start
3953 * scripts with argv[1] set to contain all #! line switches (the
3957 * Check that we got all the arguments listed in the #! line (not
3958 * just that there are no extraneous arguments). Might not matter
3959 * much, as switches from #! line seem to be acted upon (also), and
3960 * so may be checked and trapped in perl. But, security checks must
3961 * be done in suidperl and not deferred to perl. Note that suidperl
3962 * does not get around to parsing (and checking) the switches on
3963 * the #! line (but execs perl sooner).
3964 * Allow (require) a trailing newline (which may be of two
3965 * characters on some architectures?) (but no other trailing
3968 len = strlen(validarg);
3969 if (strEQ(validarg," PHOOEY ") ||
3970 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3971 !((s_end - s) == len+1
3972 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3973 Perl_croak(aTHX_ "Args must match #! line");
3976 if (PL_fdscript < 0 &&
3977 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3978 PL_euid == PL_statbuf.st_uid)
3980 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3981 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3982 #endif /* IAMSUID */
3984 if (PL_fdscript < 0 &&
3985 PL_euid) { /* oops, we're not the setuid root perl */
3987 * When root runs a setuid script, we do not go through the same
3988 * steps of execing sperl and then perl with fd scripts, but
3989 * simply set up UIDs within the same perl invocation; so do
3990 * not have the same checks (on options, whatever) that we have
3991 * for plain users. No problem really: would have to be a script
3992 * that does not actually work for plain users; and if root is
3993 * foolish and can be persuaded to run such an unsafe script, he
3994 * might run also non-setuid ones, and deserves what he gets.
3996 * Or, we might drop the PL_euid check above (and rely just on
3997 * PL_fdscript to avoid loops), and do the execs
4003 * Pass fd script to suidperl.
4004 * Exec suidperl, substituting fd script for scriptname.
4005 * Pass script name as "subdir" of fd, which perl will grok;
4006 * in fact will use that to distinguish this from "normal"
4007 * usage, see comments above.
4009 PerlIO_rewind(PL_rsfp);
4010 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4011 /* PSz 27 Feb 04 Sanity checks on scriptname */
4012 if ((!scriptname) || (!*scriptname) ) {
4013 Perl_croak(aTHX_ "No setuid script name\n");
4015 if (*scriptname == '-') {
4016 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4017 /* Or we might confuse it with an option when replacing
4018 * name in argument list, below (though we do pointer, not
4019 * string, comparisons).
4022 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4023 if (!PL_origargv[which]) {
4024 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4026 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4027 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4028 #if defined(HAS_FCNTL) && defined(F_SETFD)
4029 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4032 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4033 (int)PERL_REVISION, (int)PERL_VERSION,
4034 (int)PERL_SUBVERSION), PL_origargv);
4036 #endif /* IAMSUID */
4037 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4040 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4042 * This seems back to front: we try HAS_SETEGID first; if not available
4043 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4044 * in the sense that we only want to set EGID; but are there any machines
4045 * with either of the latter, but not the former? Same with UID, later.
4048 (void)setegid(PL_statbuf.st_gid);
4051 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4053 #ifdef HAS_SETRESGID
4054 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4056 PerlProc_setgid(PL_statbuf.st_gid);
4060 if (PerlProc_getegid() != PL_statbuf.st_gid)
4061 Perl_croak(aTHX_ "Can't do setegid!\n");
4063 if (PL_statbuf.st_mode & S_ISUID) {
4064 if (PL_statbuf.st_uid != PL_euid)
4066 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4069 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4071 #ifdef HAS_SETRESUID
4072 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4074 PerlProc_setuid(PL_statbuf.st_uid);
4078 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4079 Perl_croak(aTHX_ "Can't do seteuid!\n");
4081 else if (PL_uid) { /* oops, mustn't run as root */
4083 (void)seteuid((Uid_t)PL_uid);
4086 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4088 #ifdef HAS_SETRESUID
4089 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4091 PerlProc_setuid((Uid_t)PL_uid);
4095 if (PerlProc_geteuid() != PL_uid)
4096 Perl_croak(aTHX_ "Can't do seteuid!\n");
4099 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4100 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4103 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4104 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4105 else if (PL_fdscript < 0 || PL_suidscript != 1)
4106 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4107 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4109 /* PSz 16 Sep 03 Keep neat error message */
4110 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4113 /* We absolutely must clear out any saved ids here, so we */
4114 /* exec the real perl, substituting fd script for scriptname. */
4115 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4117 * It might be thought that using setresgid and/or setresuid (changed to
4118 * set the saved IDs) above might obviate the need to exec, and we could
4119 * go on to "do the perl thing".
4121 * Is there such a thing as "saved GID", and is that set for setuid (but
4122 * not setgid) execution like suidperl? Without exec, it would not be
4123 * cleared for setuid (but not setgid) scripts (or might need a dummy
4126 * We need suidperl to do the exact same argument checking that perl
4127 * does. Thus it cannot be very small; while it could be significantly
4128 * smaller, it is safer (simpler?) to make it essentially the same
4129 * binary as perl (but they are not identical). - Maybe could defer that
4130 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4131 * but prefer to do thorough checks in suidperl itself. Such deferral
4132 * would make suidperl security rely on perl, a design no-no.
4134 * Setuid things should be short and simple, thus easy to understand and
4135 * verify. They should do their "own thing", without influence by
4136 * attackers. It may help if their internal execution flow is fixed,
4137 * regardless of platform: it may be best to exec anyway.
4139 * Suidperl should at least be conceptually simple: a wrapper only,
4140 * never to do any real perl. Maybe we should put
4142 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4144 * into the perly bits.
4146 PerlIO_rewind(PL_rsfp);
4147 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4149 * Keep original arguments: suidperl already has fd script.
4151 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4152 /* if (!PL_origargv[which]) { */
4153 /* errno = EPERM; */
4154 /* Perl_croak(aTHX_ "Permission denied\n"); */
4156 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4157 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4158 #if defined(HAS_FCNTL) && defined(F_SETFD)
4159 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4162 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4163 (int)PERL_REVISION, (int)PERL_VERSION,
4164 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4166 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4167 #endif /* IAMSUID */
4169 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4170 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4171 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4172 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4174 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4177 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4178 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4179 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4180 /* not set-id, must be wrapped */
4188 S_find_beginning(pTHX)
4191 register const char *s2;
4192 #ifdef MACOS_TRADITIONAL
4196 /* skip forward in input to the real script? */
4199 #ifdef MACOS_TRADITIONAL
4200 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4202 while (PL_doextract || gMacPerl_AlwaysExtract) {
4203 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4204 if (!gMacPerl_AlwaysExtract)
4205 Perl_croak(aTHX_ "No Perl script found in input\n");
4207 if (PL_doextract) /* require explicit override ? */
4208 if (!OverrideExtract(PL_origfilename))
4209 Perl_croak(aTHX_ "User aborted script\n");
4211 PL_doextract = FALSE;
4213 /* Pater peccavi, file does not have #! */
4214 PerlIO_rewind(PL_rsfp);
4219 while (PL_doextract) {
4220 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4221 Perl_croak(aTHX_ "No Perl script found in input\n");
4224 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4225 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4226 PL_doextract = FALSE;
4227 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4229 while (*s == ' ' || *s == '\t') s++;
4231 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4232 || s2[-1] == '_') s2--;
4233 if (strnEQ(s2-4,"perl",4))
4234 while ((s = moreswitches(s)))
4237 #ifdef MACOS_TRADITIONAL
4238 /* We are always searching for the #!perl line in MacPerl,
4239 * so if we find it, still keep the line count correct
4240 * by counting lines we already skipped over
4242 for (; maclines > 0 ; maclines--)
4243 PerlIO_ungetc(PL_rsfp, '\n');
4247 /* gMacPerl_AlwaysExtract is false in MPW tool */
4248 } else if (gMacPerl_AlwaysExtract) {
4259 PL_uid = PerlProc_getuid();
4260 PL_euid = PerlProc_geteuid();
4261 PL_gid = PerlProc_getgid();
4262 PL_egid = PerlProc_getegid();
4264 PL_uid |= PL_gid << 16;
4265 PL_euid |= PL_egid << 16;
4267 /* Should not happen: */
4268 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4269 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4272 * Should go by suidscript, not uid!=euid: why disallow
4273 * system("ls") in scripts run from setuid things?
4274 * Or, is this run before we check arguments and set suidscript?
4275 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4276 * (We never have suidscript, can we be sure to have fdscript?)
4277 * Or must then go by UID checks? See comments in forbid_setid also.
4281 /* This is used very early in the lifetime of the program,
4282 * before even the options are parsed, so PL_tainting has
4283 * not been initialized properly. */
4285 Perl_doing_taint(int argc, char *argv[], char *envp[])
4287 #ifndef PERL_IMPLICIT_SYS
4288 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4289 * before we have an interpreter-- and the whole point of this
4290 * function is to be called at such an early stage. If you are on
4291 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4292 * "tainted because running with altered effective ids', you'll
4293 * have to add your own checks somewhere in here. The two most
4294 * known samples of 'implicitness' are Win32 and NetWare, neither
4295 * of which has much of concept of 'uids'. */
4296 int uid = PerlProc_getuid();
4297 int euid = PerlProc_geteuid();
4298 int gid = PerlProc_getgid();
4299 int egid = PerlProc_getegid();
4306 if (uid && (euid != uid || egid != gid))
4308 #endif /* !PERL_IMPLICIT_SYS */
4309 /* This is a really primitive check; environment gets ignored only
4310 * if -T are the first chars together; otherwise one gets
4311 * "Too late" message. */
4312 if ( argc > 1 && argv[1][0] == '-'
4313 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4319 S_forbid_setid(pTHX_ const char *s)
4321 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4322 if (PL_euid != PL_uid)
4323 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4324 if (PL_egid != PL_gid)
4325 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4326 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4328 * Checks for UID/GID above "wrong": why disallow
4329 * perl -e 'print "Hello\n"'
4330 * from within setuid things?? Simply drop them: replaced by
4331 * fdscript/suidscript and #ifdef IAMSUID checks below.
4333 * This may be too late for command-line switches. Will catch those on
4334 * the #! line, after finding the script name and setting up
4335 * fdscript/suidscript. Note that suidperl does not get around to
4336 * parsing (and checking) the switches on the #! line, but checks that
4337 * the two sets are identical.
4339 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4340 * instead, or would that be "too late"? (We never have suidscript, can
4341 * we be sure to have fdscript?)
4343 * Catch things with suidscript (in descendant of suidperl), even with
4344 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4345 * below; but I am paranoid.
4347 * Also see comments about root running a setuid script, elsewhere.
4349 if (PL_suidscript >= 0)
4350 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4352 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4353 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4354 #endif /* IAMSUID */
4358 Perl_init_debugger(pTHX)
4360 HV * const ostash = PL_curstash;
4362 PL_curstash = PL_debstash;
4363 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4364 AvREAL_off(PL_dbargs);
4365 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4366 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4367 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4368 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4369 sv_setiv(PL_DBsingle, 0);
4370 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4371 sv_setiv(PL_DBtrace, 0);
4372 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4373 sv_setiv(PL_DBsignal, 0);
4374 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4375 sv_setiv(PL_DBassertion, 0);
4376 PL_curstash = ostash;
4379 #ifndef STRESS_REALLOC
4380 #define REASONABLE(size) (size)
4382 #define REASONABLE(size) (1) /* unreasonable */
4386 Perl_init_stacks(pTHX)
4388 /* start with 128-item stack and 8K cxstack */
4389 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4390 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4391 PL_curstackinfo->si_type = PERLSI_MAIN;
4392 PL_curstack = PL_curstackinfo->si_stack;
4393 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4395 PL_stack_base = AvARRAY(PL_curstack);
4396 PL_stack_sp = PL_stack_base;
4397 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4399 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4402 PL_tmps_max = REASONABLE(128);
4404 Newx(PL_markstack,REASONABLE(32),I32);
4405 PL_markstack_ptr = PL_markstack;
4406 PL_markstack_max = PL_markstack + REASONABLE(32);
4410 Newx(PL_scopestack,REASONABLE(32),I32);
4411 PL_scopestack_ix = 0;
4412 PL_scopestack_max = REASONABLE(32);
4414 Newx(PL_savestack,REASONABLE(128),ANY);
4415 PL_savestack_ix = 0;
4416 PL_savestack_max = REASONABLE(128);
4424 while (PL_curstackinfo->si_next)
4425 PL_curstackinfo = PL_curstackinfo->si_next;
4426 while (PL_curstackinfo) {
4427 PERL_SI *p = PL_curstackinfo->si_prev;
4428 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4429 Safefree(PL_curstackinfo->si_cxstack);
4430 Safefree(PL_curstackinfo);
4431 PL_curstackinfo = p;
4433 Safefree(PL_tmps_stack);
4434 Safefree(PL_markstack);
4435 Safefree(PL_scopestack);
4436 Safefree(PL_savestack);
4445 lex_start(PL_linestr);
4447 PL_subname = newSVpvn("main",4);
4451 S_init_predump_symbols(pTHX)
4456 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4457 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4458 GvMULTI_on(PL_stdingv);
4459 io = GvIOp(PL_stdingv);
4460 IoTYPE(io) = IoTYPE_RDONLY;
4461 IoIFP(io) = PerlIO_stdin();
4462 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4464 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4466 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4469 IoTYPE(io) = IoTYPE_WRONLY;
4470 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4472 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4474 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4476 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4477 GvMULTI_on(PL_stderrgv);
4478 io = GvIOp(PL_stderrgv);
4479 IoTYPE(io) = IoTYPE_WRONLY;
4480 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4481 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4483 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4485 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4487 Safefree(PL_osname);
4488 PL_osname = savepv(OSNAME);
4492 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4494 argc--,argv++; /* skip name of script */
4495 if (PL_doswitches) {
4496 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4500 if (argv[0][1] == '-' && !argv[0][2]) {
4504 if ((s = strchr(argv[0], '='))) {
4506 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4509 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4512 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4513 GvMULTI_on(PL_argvgv);
4514 (void)gv_AVadd(PL_argvgv);
4515 av_clear(GvAVn(PL_argvgv));
4516 for (; argc > 0; argc--,argv++) {
4517 SV * const sv = newSVpv(argv[0],0);
4518 av_push(GvAVn(PL_argvgv),sv);
4519 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4520 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4523 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4524 (void)sv_utf8_decode(sv);
4530 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4535 PL_toptarget = NEWSV(0,0);
4536 sv_upgrade(PL_toptarget, SVt_PVFM);
4537 sv_setpvn(PL_toptarget, "", 0);
4538 PL_bodytarget = NEWSV(0,0);
4539 sv_upgrade(PL_bodytarget, SVt_PVFM);
4540 sv_setpvn(PL_bodytarget, "", 0);
4541 PL_formtarget = PL_bodytarget;
4545 init_argv_symbols(argc,argv);
4547 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4548 #ifdef MACOS_TRADITIONAL
4549 /* $0 is not majick on a Mac */
4550 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4552 sv_setpv(GvSV(tmpgv),PL_origfilename);
4553 magicname("0", "0", 1);
4556 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4558 GvMULTI_on(PL_envgv);
4559 hv = GvHVn(PL_envgv);
4560 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4562 #ifdef USE_ENVIRON_ARRAY
4563 /* Note that if the supplied env parameter is actually a copy
4564 of the global environ then it may now point to free'd memory
4565 if the environment has been modified since. To avoid this
4566 problem we treat env==NULL as meaning 'use the default'
4571 # ifdef USE_ITHREADS
4572 && PL_curinterp == aTHX
4576 environ[0] = Nullch;
4579 char** origenv = environ;
4582 for (; *env; env++) {
4583 if (!(s = strchr(*env,'=')) || s == *env)
4585 #if defined(MSDOS) && !defined(DJGPP)
4590 sv = newSVpv(s+1, 0);
4591 (void)hv_store(hv, *env, s - *env, sv, 0);
4594 if (origenv != environ) {
4595 /* realloc has shifted us */
4596 env = (env - origenv) + environ;
4601 #endif /* USE_ENVIRON_ARRAY */
4602 #endif /* !PERL_MICRO */
4605 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4606 SvREADONLY_off(GvSV(tmpgv));
4607 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4608 SvREADONLY_on(GvSV(tmpgv));
4610 #ifdef THREADS_HAVE_PIDS
4611 PL_ppid = (IV)getppid();
4614 /* touch @F array to prevent spurious warnings 20020415 MJD */
4616 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4618 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4619 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4620 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4624 S_init_perllib(pTHX)
4629 s = PerlEnv_getenv("PERL5LIB");
4631 * It isn't possible to delete an environment variable with
4632 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4633 * case we treat PERL5LIB as undefined if it has a zero-length value.
4635 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4636 if (s && *s != '\0')
4640 incpush(s, TRUE, TRUE, TRUE, FALSE);
4642 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4644 /* Treat PERL5?LIB as a possible search list logical name -- the
4645 * "natural" VMS idiom for a Unix path string. We allow each
4646 * element to be a set of |-separated directories for compatibility.
4650 if (my_trnlnm("PERL5LIB",buf,0))
4651 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4653 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4657 /* Use the ~-expanded versions of APPLLIB (undocumented),
4658 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4661 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4665 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4667 #ifdef MACOS_TRADITIONAL
4670 SV * privdir = NEWSV(55, 0);
4671 char * macperl = PerlEnv_getenv("MACPERL");
4676 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4677 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4678 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4679 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4680 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4681 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4683 SvREFCNT_dec(privdir);
4686 incpush(":", FALSE, FALSE, TRUE, FALSE);
4689 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4692 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4694 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4698 /* sitearch is always relative to sitelib on Windows for
4699 * DLL-based path intuition to work correctly */
4700 # if !defined(WIN32)
4701 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4707 /* this picks up sitearch as well */
4708 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4710 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4714 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4715 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4718 #ifdef PERL_VENDORARCH_EXP
4719 /* vendorarch is always relative to vendorlib on Windows for
4720 * DLL-based path intuition to work correctly */
4721 # if !defined(WIN32)
4722 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4726 #ifdef PERL_VENDORLIB_EXP
4728 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4730 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4734 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4735 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4738 #ifdef PERL_OTHERLIBDIRS
4739 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4743 incpush(".", FALSE, FALSE, TRUE, FALSE);
4744 #endif /* MACOS_TRADITIONAL */
4747 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4748 # define PERLLIB_SEP ';'
4751 # define PERLLIB_SEP '|'
4753 # if defined(MACOS_TRADITIONAL)
4754 # define PERLLIB_SEP ','
4756 # define PERLLIB_SEP ':'
4760 #ifndef PERLLIB_MANGLE
4761 # define PERLLIB_MANGLE(s,n) (s)
4764 /* Push a directory onto @INC if it exists.
4765 Generate a new SV if we do this, to save needing to copy the SV we push
4768 S_incpush_if_exists(pTHX_ SV *dir)
4771 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4772 S_ISDIR(tmpstatbuf.st_mode)) {
4773 av_push(GvAVn(PL_incgv), dir);
4780 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4783 SV *subdir = Nullsv;
4784 const char *p = dir;
4789 if (addsubdirs || addoldvers) {
4790 subdir = NEWSV(0,0);
4793 /* Break at all separators */
4795 SV *libdir = NEWSV(55,0);
4798 /* skip any consecutive separators */
4800 while ( *p == PERLLIB_SEP ) {
4801 /* Uncomment the next line for PATH semantics */
4802 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4807 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4808 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4813 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4814 p = Nullch; /* break out */
4816 #ifdef MACOS_TRADITIONAL
4817 if (!strchr(SvPVX(libdir), ':')) {
4820 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4822 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4823 sv_catpv(libdir, ":");
4826 /* Do the if() outside the #ifdef to avoid warnings about an unused
4829 #ifdef PERL_RELOCATABLE_INC
4831 * Relocatable include entries are marked with a leading .../
4834 * 0: Remove that leading ".../"
4835 * 1: Remove trailing executable name (anything after the last '/')
4836 * from the perl path to give a perl prefix
4838 * While the @INC element starts "../" and the prefix ends with a real
4839 * directory (ie not . or ..) chop that real directory off the prefix
4840 * and the leading "../" from the @INC element. ie a logical "../"
4842 * Finally concatenate the prefix and the remainder of the @INC element
4843 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4844 * generates /usr/local/lib/perl5
4846 const char *libpath = SvPVX(libdir);
4847 STRLEN libpath_len = SvCUR(libdir);
4848 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4850 SV * const caret_X = get_sv("\030", 0);
4851 /* Going to use the SV just as a scratch buffer holding a C
4857 /* $^X is *the* source of taint if tainting is on, hence
4858 SvPOK() won't be true. */
4860 assert(SvPOKp(caret_X));
4861 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4862 /* Firstly take off the leading .../
4863 If all else fail we'll do the paths relative to the current
4865 sv_chop(libdir, libpath + 4);
4866 /* Don't use SvPV as we're intentionally bypassing taining,
4867 mortal copies that the mg_get of tainting creates, and
4868 corruption that seems to come via the save stack.
4869 I guess that the save stack isn't correctly set up yet. */
4870 libpath = SvPVX(libdir);
4871 libpath_len = SvCUR(libdir);
4873 /* This would work more efficiently with memrchr, but as it's
4874 only a GNU extension we'd need to probe for it and
4875 implement our own. Not hard, but maybe not worth it? */
4877 prefix = SvPVX(prefix_sv);
4878 lastslash = strrchr(prefix, '/');
4880 /* First time in with the *lastslash = '\0' we just wipe off
4881 the trailing /perl from (say) /usr/foo/bin/perl
4885 while ((*lastslash = '\0'), /* Do that, come what may. */
4886 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4887 && (lastslash = strrchr(prefix, '/')))) {
4888 if (lastslash[1] == '\0'
4889 || (lastslash[1] == '.'
4890 && (lastslash[2] == '/' /* ends "/." */
4891 || (lastslash[2] == '/'
4892 && lastslash[3] == '/' /* or "/.." */
4894 /* Prefix ends "/" or "/." or "/..", any of which
4895 are fishy, so don't do any more logical cleanup.
4899 /* Remove leading "../" from path */
4902 /* Next iteration round the loop removes the last
4903 directory name from prefix by writing a '\0' in
4904 the while clause. */
4906 /* prefix has been terminated with a '\0' to the correct
4907 length. libpath points somewhere into the libdir SV.
4908 We need to join the 2 with '/' and drop the result into
4910 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4911 SvREFCNT_dec(libdir);
4912 /* And this is the new libdir. */
4915 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4916 /* Need to taint reloccated paths if running set ID */
4917 SvTAINTED_on(libdir);
4920 SvREFCNT_dec(prefix_sv);
4925 * BEFORE pushing libdir onto @INC we may first push version- and
4926 * archname-specific sub-directories.
4928 if (addsubdirs || addoldvers) {
4929 #ifdef PERL_INC_VERSION_LIST
4930 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4931 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4932 const char * const *incver;
4938 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4940 while (unix[len-1] == '/') len--; /* Cosmetic */
4941 sv_usepvn(libdir,unix,len);
4944 PerlIO_printf(Perl_error_log,
4945 "Failed to unixify @INC element \"%s\"\n",
4949 #ifdef MACOS_TRADITIONAL
4950 #define PERL_AV_SUFFIX_FMT ""
4951 #define PERL_ARCH_FMT "%s:"
4952 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4954 #define PERL_AV_SUFFIX_FMT "/"
4955 #define PERL_ARCH_FMT "/%s"
4956 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4958 /* .../version/archname if -d .../version/archname */
4959 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4961 (int)PERL_REVISION, (int)PERL_VERSION,
4962 (int)PERL_SUBVERSION, ARCHNAME);
4963 subdir = S_incpush_if_exists(aTHX_ subdir);
4965 /* .../version if -d .../version */
4966 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4967 (int)PERL_REVISION, (int)PERL_VERSION,
4968 (int)PERL_SUBVERSION);
4969 subdir = S_incpush_if_exists(aTHX_ subdir);
4971 /* .../archname if -d .../archname */
4972 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4973 subdir = S_incpush_if_exists(aTHX_ subdir);
4977 #ifdef PERL_INC_VERSION_LIST
4979 for (incver = incverlist; *incver; incver++) {
4980 /* .../xxx if -d .../xxx */
4981 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4982 subdir = S_incpush_if_exists(aTHX_ subdir);
4988 /* finally push this lib directory on the end of @INC */
4989 av_push(GvAVn(PL_incgv), libdir);
4992 assert (SvREFCNT(subdir) == 1);
4993 SvREFCNT_dec(subdir);
4997 #ifdef USE_5005THREADS
4998 STATIC struct perl_thread *
4999 S_init_main_thread(pTHX)
5001 #if !defined(PERL_IMPLICIT_CONTEXT)
5002 struct perl_thread *thr;
5006 Newxz(thr, 1, struct perl_thread);
5007 PL_curcop = &PL_compiling;
5008 thr->interp = PERL_GET_INTERP;
5009 thr->cvcache = newHV();
5010 thr->threadsv = newAV();
5011 /* thr->threadsvp is set when find_threadsv is called */
5012 thr->specific = newAV();
5013 thr->flags = THRf_R_JOINABLE;
5014 MUTEX_INIT(&thr->mutex);
5015 /* Handcraft thrsv similarly to mess_sv */
5016 Newx(PL_thrsv, 1, SV);
5018 SvFLAGS(PL_thrsv) = SVt_PV;
5019 SvANY(PL_thrsv) = (void*)xpv;
5020 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5021 SvPV_set(PL_thrsvr, (char*)thr);
5022 SvCUR_set(PL_thrsv, sizeof(thr));
5023 SvLEN_set(PL_thrsv, sizeof(thr));
5024 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5025 thr->oursv = PL_thrsv;
5026 PL_chopset = " \n-";
5029 MUTEX_LOCK(&PL_threads_mutex);
5035 MUTEX_UNLOCK(&PL_threads_mutex);
5037 #ifdef HAVE_THREAD_INTERN
5038 Perl_init_thread_intern(thr);
5041 #ifdef SET_THREAD_SELF
5042 SET_THREAD_SELF(thr);
5044 thr->self = pthread_self();
5045 #endif /* SET_THREAD_SELF */
5049 * These must come after the thread self setting
5050 * because sv_setpvn does SvTAINT and the taint
5051 * fields thread selfness being set.
5053 PL_toptarget = NEWSV(0,0);
5054 sv_upgrade(PL_toptarget, SVt_PVFM);
5055 sv_setpvn(PL_toptarget, "", 0);
5056 PL_bodytarget = NEWSV(0,0);
5057 sv_upgrade(PL_bodytarget, SVt_PVFM);
5058 sv_setpvn(PL_bodytarget, "", 0);
5059 PL_formtarget = PL_bodytarget;
5060 thr->errsv = newSVpvn("", 0);
5061 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5064 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5065 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5066 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5067 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5068 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5069 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5071 PL_reginterp_cnt = 0;
5075 #endif /* USE_5005THREADS */
5078 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5082 const line_t oldline = CopLINE(PL_curcop);
5088 while (av_len(paramList) >= 0) {
5089 cv = (CV*)av_shift(paramList);
5091 if (paramList == PL_beginav) {
5092 /* save PL_beginav for compiler */
5093 if (! PL_beginav_save)
5094 PL_beginav_save = newAV();
5095 av_push(PL_beginav_save, (SV*)cv);
5097 else if (paramList == PL_checkav) {
5098 /* save PL_checkav for compiler */
5099 if (! PL_checkav_save)
5100 PL_checkav_save = newAV();
5101 av_push(PL_checkav_save, (SV*)cv);
5111 (void)SvPV_const(atsv, len);
5113 PL_curcop = &PL_compiling;
5114 CopLINE_set(PL_curcop, oldline);
5115 if (paramList == PL_beginav)
5116 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5118 Perl_sv_catpvf(aTHX_ atsv,
5119 "%s failed--call queue aborted",
5120 paramList == PL_checkav ? "CHECK"
5121 : paramList == PL_initav ? "INIT"
5123 while (PL_scopestack_ix > oldscope)
5126 Perl_croak(aTHX_ "%"SVf"", atsv);
5133 /* my_exit() was called */
5134 while (PL_scopestack_ix > oldscope)
5137 PL_curstash = PL_defstash;
5138 PL_curcop = &PL_compiling;
5139 CopLINE_set(PL_curcop, oldline);
5141 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5142 if (paramList == PL_beginav)
5143 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5145 Perl_croak(aTHX_ "%s failed--call queue aborted",
5146 paramList == PL_checkav ? "CHECK"
5147 : paramList == PL_initav ? "INIT"
5154 PL_curcop = &PL_compiling;
5155 CopLINE_set(PL_curcop, oldline);
5158 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5167 S_call_list_body(pTHX_ CV *cv)
5169 PUSHMARK(PL_stack_sp);
5170 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5175 Perl_my_exit(pTHX_ U32 status)
5177 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5178 thr, (unsigned long) status));
5187 STATUS_EXIT_SET(status);
5194 Perl_my_failure_exit(pTHX)
5197 /* We have been called to fall on our sword. The desired exit code
5198 * should be already set in STATUS_UNIX, but could be shifted over
5199 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5202 * If an error code has not been set, then force the issue.
5204 if (MY_POSIX_EXIT) {
5206 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5207 * the exit code when there isn't an error.
5210 if (STATUS_UNIX == 0)
5211 STATUS_UNIX_EXIT_SET(255);
5213 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5215 /* The exit code could have been set by $? or vmsish which
5216 * means that it may not be fatal. So convert
5217 * success/warning codes to fatal.
5219 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5220 STATUS_UNIX_EXIT_SET(255);
5224 /* Traditionally Perl on VMS always expects a Fatal Error. */
5225 if (vaxc$errno & 1) {
5227 /* So force success status to failure */
5228 if (STATUS_NATIVE & 1)
5233 STATUS_UNIX = EINTR; /* In case something cares */
5238 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5240 /* Encode the severity code */
5241 severity = STATUS_NATIVE & STS$M_SEVERITY;
5242 STATUS_UNIX = (severity ? severity : 1) << 8;
5244 /* Perl expects this to be a fatal error */
5245 if (severity != STS$K_SEVERE)
5254 STATUS_UNIX_SET(errno);
5256 exitstatus = STATUS_UNIX >> 8;
5257 if (exitstatus & 255)
5258 STATUS_UNIX_SET(exitstatus);
5260 STATUS_UNIX_SET(255);
5267 S_my_exit_jump(pTHX)
5270 register PERL_CONTEXT *cx;
5275 SvREFCNT_dec(PL_e_script);
5276 PL_e_script = Nullsv;
5279 POPSTACK_TO(PL_mainstack);
5280 if (cxstack_ix >= 0) {
5283 POPBLOCK(cx,PL_curpm);
5288 PERL_UNUSED_VAR(gimme);
5289 PERL_UNUSED_VAR(newsp);
5293 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5295 const char * const p = SvPVX_const(PL_e_script);
5296 const char *nl = strchr(p, '\n');
5298 PERL_UNUSED_ARG(idx);
5299 PERL_UNUSED_ARG(maxlen);
5301 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5303 filter_del(read_e_script);
5306 sv_catpvn(buf_sv, p, nl-p);
5307 sv_chop(PL_e_script, nl);
5313 * c-indentation-style: bsd
5315 * indent-tabs-mode: t
5318 * ex: set ts=8 sts=4 sw=4 noet: