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_TRACK_MEMPOOL
1790 " PERL_TRACK_MEMPOOL"
1792 # ifdef PERL_USE_SAFE_PUTENV
1793 " PERL_USE_SAFE_PUTENV"
1795 #ifdef PERL_USES_PL_PIDSTATUS
1796 " PERL_USES_PL_PIDSTATUS"
1798 # ifdef PL_OP_SLAB_ALLOC
1801 # ifdef SPRINTF_RETURNS_STRLEN
1802 " SPRINTF_RETURNS_STRLEN"
1804 # ifdef THREADS_HAVE_PIDS
1805 " THREADS_HAVE_PIDS"
1807 # ifdef USE_5005THREADS
1810 # ifdef USE_64_BIT_ALL
1813 # ifdef USE_64_BIT_INT
1816 # ifdef USE_ITHREADS
1819 # ifdef USE_LARGE_FILES
1822 # ifdef USE_LONG_DOUBLE
1828 # ifdef USE_REENTRANT_API
1829 " USE_REENTRANT_API"
1834 # ifdef USE_SITECUSTOMIZE
1835 " USE_SITECUSTOMIZE"
1842 while (SvCUR(opts_prog) > opts+76) {
1843 /* find last space after "options: " and before col 76
1847 char * const pv = SvPV_nolen(opts_prog);
1848 const char c = pv[opts+76];
1850 space = strrchr(pv+opts+26, ' ');
1852 if (!space) break; /* "Can't happen" */
1854 /* break the line before that space */
1857 sv_insert(opts_prog, opts, 0,
1861 sv_catpv(opts_prog,"\\n\",");
1863 #if defined(LOCAL_PATCH_COUNT)
1864 if (LOCAL_PATCH_COUNT > 0) {
1867 "\" Locally applied patches:\\n\",");
1868 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1869 if (PL_localpatches[i])
1870 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1871 0, PL_localpatches[i], 0);
1875 Perl_sv_catpvf(aTHX_ opts_prog,
1876 "\" Built under %s\\n\"",OSNAME);
1879 Perl_sv_catpvf(aTHX_ opts_prog,
1880 ",\" Compiled at %s %s\\n\"",__DATE__,
1883 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1887 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1888 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1889 "sort grep {/^PERL/} keys %ENV; ");
1892 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1895 "print \" \\%ENV:\\n @env\\n\" if @env;"
1896 "print \" \\@INC:\\n @INC\\n\";");
1900 opts_prog = Perl_newSVpvf(aTHX_
1901 "Config::config_vars(qw%c%s%c)",
1905 av_push(PL_preambleav, opts_prog);
1906 /* don't look for script or read stdin */
1907 scriptname = BIT_BUCKET;
1911 PL_doextract = TRUE;
1919 if (!*++s || isSPACE(*s)) {
1923 /* catch use of gnu style long options */
1924 if (strEQ(s, "version")) {
1928 if (strEQ(s, "help")) {
1935 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1941 #ifndef SECURE_INTERNAL_GETENV
1944 (s = PerlEnv_getenv("PERL5OPT")))
1946 const char *popt = s;
1949 if (*s == '-' && *(s+1) == 'T') {
1950 CHECK_MALLOC_TOO_LATE_FOR('T');
1952 PL_taint_warn = FALSE;
1955 char *popt_copy = Nullch;
1968 if (!strchr("CDIMUdmtwA", *s))
1969 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1973 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1974 s = popt_copy + (s - popt);
1975 d = popt_copy + (d - popt);
1982 if( !PL_tainting ) {
1983 PL_taint_warn = TRUE;
1993 #ifdef USE_SITECUSTOMIZE
1996 PL_preambleav = newAV();
1997 av_unshift(PL_preambleav, 1);
1998 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2002 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2003 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2007 scriptname = argv[0];
2010 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2012 else if (scriptname == Nullch) {
2014 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2020 /* Set $^X early so that it can be used for relocatable paths in @INC */
2021 assert (!PL_tainted);
2023 S_set_caret_X(aTHX);
2027 open_script(scriptname,dosearch,sv);
2029 validate_suid(validarg, scriptname);
2032 #if defined(SIGCHLD) || defined(SIGCLD)
2035 # define SIGCHLD SIGCLD
2037 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2038 if (sigstate == (Sighandler_t) SIG_IGN) {
2039 if (ckWARN(WARN_SIGNAL))
2040 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2041 "Can't ignore signal CHLD, forcing to default");
2042 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2048 #ifdef MACOS_TRADITIONAL
2049 if (PL_doextract || gMacPerl_AlwaysExtract) {
2054 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2055 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2059 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2060 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2061 CvUNIQUE_on(PL_compcv);
2063 CvPADLIST(PL_compcv) = pad_new(0);
2064 #ifdef USE_5005THREADS
2065 CvOWNER(PL_compcv) = 0;
2066 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2067 MUTEX_INIT(CvMUTEXP(PL_compcv));
2068 #endif /* USE_5005THREADS */
2071 boot_core_UNIVERSAL();
2072 boot_core_xsutils();
2075 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2077 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2083 # ifdef HAS_SOCKS5_INIT
2084 socks5_init(argv[0]);
2090 init_predump_symbols();
2091 /* init_postdump_symbols not currently designed to be called */
2092 /* more than once (ENV isn't cleared first, for example) */
2093 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2095 init_postdump_symbols(argc,argv,env);
2097 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2098 * or explicitly in some platforms.
2099 * locale.c:Perl_init_i18nl10n() if the environment
2100 * look like the user wants to use UTF-8. */
2101 #if defined(__SYMBIAN32__)
2102 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2105 /* Requires init_predump_symbols(). */
2106 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2111 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2112 * and the default open disciplines. */
2113 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2114 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2116 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2117 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2118 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2120 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2121 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2122 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2124 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2125 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2126 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2127 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2128 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2131 sv_setpvn(sv, ":utf8\0:utf8", 11);
2133 sv_setpvn(sv, ":utf8\0", 6);
2136 sv_setpvn(sv, "\0:utf8", 6);
2142 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2143 if (strEQ(s, "unsafe"))
2144 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2145 else if (strEQ(s, "safe"))
2146 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2148 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2153 /* now parse the script */
2155 SETERRNO(0,SS_NORMAL);
2157 #ifdef MACOS_TRADITIONAL
2158 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2160 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2162 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2163 MacPerl_MPWFileName(PL_origfilename));
2167 if (yyparse() || PL_error_count) {
2169 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2171 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2176 CopLINE_set(PL_curcop, 0);
2177 PL_curstash = PL_defstash;
2178 PL_preprocess = FALSE;
2180 SvREFCNT_dec(PL_e_script);
2181 PL_e_script = Nullsv;
2188 SAVECOPFILE(PL_curcop);
2189 SAVECOPLINE(PL_curcop);
2190 gv_check(PL_defstash);
2197 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2198 dump_mstats("after compilation:");
2207 =for apidoc perl_run
2209 Tells a Perl interpreter to run. See L<perlembed>.
2221 PERL_UNUSED_ARG(my_perl);
2223 oldscope = PL_scopestack_ix;
2231 cxstack_ix = -1; /* start context stack again */
2233 case 0: /* normal completion */
2237 case 2: /* my_exit() */
2238 while (PL_scopestack_ix > oldscope)
2241 PL_curstash = PL_defstash;
2242 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2243 PL_endav && !PL_minus_c)
2244 call_list(oldscope, PL_endav);
2246 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2247 dump_mstats("after execution: ");
2253 POPSTACK_TO(PL_mainstack);
2256 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2268 S_run_body(pTHX_ I32 oldscope)
2270 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2271 PL_sawampersand ? "Enabling" : "Omitting"));
2273 if (!PL_restartop) {
2274 DEBUG_x(dump_all());
2277 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2279 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2283 #ifdef MACOS_TRADITIONAL
2284 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2285 (gMacPerl_ErrorFormat ? "# " : ""),
2286 MacPerl_MPWFileName(PL_origfilename));
2288 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2292 if (PERLDB_SINGLE && PL_DBsingle)
2293 sv_setiv(PL_DBsingle, 1);
2295 call_list(oldscope, PL_initav);
2301 PL_op = PL_restartop;
2305 else if (PL_main_start) {
2306 CvDEPTH(PL_main_cv) = 1;
2307 PL_op = PL_main_start;
2315 =head1 SV Manipulation Functions
2317 =for apidoc p||get_sv
2319 Returns the SV of the specified Perl scalar. If C<create> is set and the
2320 Perl variable does not exist then it will be created. If C<create> is not
2321 set and the variable does not exist then NULL is returned.
2327 Perl_get_sv(pTHX_ const char *name, I32 create)
2330 #ifdef USE_5005THREADS
2331 if (name[1] == '\0' && !isALPHA(name[0])) {
2332 PADOFFSET tmp = find_threadsv(name);
2333 if (tmp != NOT_IN_PAD)
2334 return THREADSV(tmp);
2336 #endif /* USE_5005THREADS */
2337 gv = gv_fetchpv(name, create, SVt_PV);
2344 =head1 Array Manipulation Functions
2346 =for apidoc p||get_av
2348 Returns the AV of the specified Perl array. If C<create> is set and the
2349 Perl variable does not exist then it will be created. If C<create> is not
2350 set and the variable does not exist then NULL is returned.
2356 Perl_get_av(pTHX_ const char *name, I32 create)
2358 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2367 =head1 Hash Manipulation Functions
2369 =for apidoc p||get_hv
2371 Returns the HV of the specified Perl hash. If C<create> is set and the
2372 Perl variable does not exist then it will be created. If C<create> is not
2373 set and the variable does not exist then NULL is returned.
2379 Perl_get_hv(pTHX_ const char *name, I32 create)
2381 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2390 =head1 CV Manipulation Functions
2392 =for apidoc p||get_cv
2394 Returns the CV of the specified Perl subroutine. If C<create> is set and
2395 the Perl subroutine does not exist then it will be declared (which has the
2396 same effect as saying C<sub name;>). If C<create> is not set and the
2397 subroutine does not exist then NULL is returned.
2403 Perl_get_cv(pTHX_ const char *name, I32 create)
2405 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2406 /* XXX unsafe for threads if eval_owner isn't held */
2407 /* XXX this is probably not what they think they're getting.
2408 * It has the same effect as "sub name;", i.e. just a forward
2410 if (create && !GvCVu(gv))
2411 return newSUB(start_subparse(FALSE, 0),
2412 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2420 /* Be sure to refetch the stack pointer after calling these routines. */
2424 =head1 Callback Functions
2426 =for apidoc p||call_argv
2428 Performs a callback to the specified Perl sub. See L<perlcall>.
2434 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2436 /* See G_* flags in cop.h */
2437 /* null terminated arg list */
2444 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2449 return call_pv(sub_name, flags);
2453 =for apidoc p||call_pv
2455 Performs a callback to the specified Perl sub. See L<perlcall>.
2461 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2462 /* name of the subroutine */
2463 /* See G_* flags in cop.h */
2465 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2469 =for apidoc p||call_method
2471 Performs a callback to the specified Perl method. The blessed object must
2472 be on the stack. See L<perlcall>.
2478 Perl_call_method(pTHX_ const char *methname, I32 flags)
2479 /* name of the subroutine */
2480 /* See G_* flags in cop.h */
2482 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2485 /* May be called with any of a CV, a GV, or an SV containing the name. */
2487 =for apidoc p||call_sv
2489 Performs a callback to the Perl sub whose name is in the SV. See
2496 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2497 /* See G_* flags in cop.h */
2500 LOGOP myop; /* fake syntax tree node */
2503 volatile I32 retval = 0;
2505 bool oldcatch = CATCH_GET;
2507 OP* const oldop = PL_op;
2510 if (flags & G_DISCARD) {
2515 Zero(&myop, 1, LOGOP);
2516 myop.op_next = Nullop;
2517 if (!(flags & G_NOARGS))
2518 myop.op_flags |= OPf_STACKED;
2519 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2520 (flags & G_ARRAY) ? OPf_WANT_LIST :
2525 EXTEND(PL_stack_sp, 1);
2526 *++PL_stack_sp = sv;
2528 oldscope = PL_scopestack_ix;
2530 if (PERLDB_SUB && PL_curstash != PL_debstash
2531 /* Handle first BEGIN of -d. */
2532 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2533 /* Try harder, since this may have been a sighandler, thus
2534 * curstash may be meaningless. */
2535 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2536 && !(flags & G_NODEBUG))
2537 PL_op->op_private |= OPpENTERSUB_DB;
2539 if (flags & G_METHOD) {
2540 Zero(&method_op, 1, UNOP);
2541 method_op.op_next = PL_op;
2542 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2543 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2544 PL_op = (OP*)&method_op;
2547 if (!(flags & G_EVAL)) {
2549 call_body((OP*)&myop, FALSE);
2550 retval = PL_stack_sp - (PL_stack_base + oldmark);
2551 CATCH_SET(oldcatch);
2554 myop.op_other = (OP*)&myop;
2556 /* we're trying to emulate pp_entertry() here */
2558 register PERL_CONTEXT *cx;
2559 const I32 gimme = GIMME_V;
2564 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2566 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2568 PL_in_eval = EVAL_INEVAL;
2569 if (flags & G_KEEPERR)
2570 PL_in_eval |= EVAL_KEEPERR;
2572 sv_setpvn(ERRSV,"",0);
2580 call_body((OP*)&myop, FALSE);
2581 retval = PL_stack_sp - (PL_stack_base + oldmark);
2582 if (!(flags & G_KEEPERR))
2583 sv_setpvn(ERRSV,"",0);
2589 /* my_exit() was called */
2590 PL_curstash = PL_defstash;
2593 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2594 Perl_croak(aTHX_ "Callback called exit");
2599 PL_op = PL_restartop;
2603 PL_stack_sp = PL_stack_base + oldmark;
2604 if (flags & G_ARRAY)
2608 *++PL_stack_sp = &PL_sv_undef;
2613 if (PL_scopestack_ix > oldscope) {
2617 register PERL_CONTEXT *cx;
2624 PERL_UNUSED_VAR(newsp);
2625 PERL_UNUSED_VAR(gimme);
2626 PERL_UNUSED_VAR(optype);
2631 if (flags & G_DISCARD) {
2632 PL_stack_sp = PL_stack_base + oldmark;
2642 S_call_body(pTHX_ const OP *myop, bool is_eval)
2644 if (PL_op == myop) {
2646 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2648 PL_op = Perl_pp_entersub(aTHX); /* this does */
2654 /* Eval a string. The G_EVAL flag is always assumed. */
2657 =for apidoc p||eval_sv
2659 Tells Perl to C<eval> the string in the SV.
2665 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2667 /* See G_* flags in cop.h */
2670 UNOP myop; /* fake syntax tree node */
2671 volatile I32 oldmark = SP - PL_stack_base;
2672 volatile I32 retval = 0;
2674 OP* const oldop = PL_op;
2677 if (flags & G_DISCARD) {
2684 Zero(PL_op, 1, UNOP);
2685 EXTEND(PL_stack_sp, 1);
2686 *++PL_stack_sp = sv;
2688 if (!(flags & G_NOARGS))
2689 myop.op_flags = OPf_STACKED;
2690 myop.op_next = Nullop;
2691 myop.op_type = OP_ENTEREVAL;
2692 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2693 (flags & G_ARRAY) ? OPf_WANT_LIST :
2695 if (flags & G_KEEPERR)
2696 myop.op_flags |= OPf_SPECIAL;
2698 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2699 * before a PUSHEVAL, which corrupts the stack after a croak */
2700 TAINT_PROPER("eval_sv()");
2706 call_body((OP*)&myop,TRUE);
2707 retval = PL_stack_sp - (PL_stack_base + oldmark);
2708 if (!(flags & G_KEEPERR))
2709 sv_setpvn(ERRSV,"",0);
2715 /* my_exit() was called */
2716 PL_curstash = PL_defstash;
2719 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2720 Perl_croak(aTHX_ "Callback called exit");
2725 PL_op = PL_restartop;
2729 PL_stack_sp = PL_stack_base + oldmark;
2730 if (flags & G_ARRAY)
2734 *++PL_stack_sp = &PL_sv_undef;
2740 if (flags & G_DISCARD) {
2741 PL_stack_sp = PL_stack_base + oldmark;
2751 =for apidoc p||eval_pv
2753 Tells Perl to C<eval> the given string and return an SV* result.
2759 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2762 SV* sv = newSVpv(p, 0);
2764 eval_sv(sv, G_SCALAR);
2771 if (croak_on_error && SvTRUE(ERRSV)) {
2772 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2778 /* Require a module. */
2781 =head1 Embedding Functions
2783 =for apidoc p||require_pv
2785 Tells Perl to C<require> the file named by the string argument. It is
2786 analogous to the Perl code C<eval "require '$file'">. It's even
2787 implemented that way; consider using load_module instead.
2792 Perl_require_pv(pTHX_ const char *pv)
2796 PUSHSTACKi(PERLSI_REQUIRE);
2798 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2799 eval_sv(sv_2mortal(sv), G_DISCARD);
2805 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2807 register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV);
2810 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2814 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2816 /* This message really ought to be max 23 lines.
2817 * Removed -h because the user already knows that option. Others? */
2819 static const char * const usage_msg[] = {
2820 "-0[octal] specify record separator (\\0, if no argument)",
2821 "-A[mod][=pattern] activate all/given assertions",
2822 "-a autosplit mode with -n or -p (splits $_ into @F)",
2823 "-C[number/list] enables the listed Unicode features",
2824 "-c check syntax only (runs BEGIN and CHECK blocks)",
2825 "-d[:debugger] run program under debugger",
2826 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2827 "-e program one line of program (several -e's allowed, omit programfile)",
2828 "-f don't do $sitelib/sitecustomize.pl at startup",
2829 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2830 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2831 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2832 "-l[octal] enable line ending processing, specifies line terminator",
2833 "-[mM][-]module execute \"use/no module...\" before executing program",
2834 "-n assume \"while (<>) { ... }\" loop around program",
2835 "-p assume loop like -n but print line also, like sed",
2836 "-P run program through C preprocessor before compilation",
2837 "-s enable rudimentary parsing for switches after programfile",
2838 "-S look for programfile using PATH environment variable",
2839 "-t enable tainting warnings",
2840 "-T enable tainting checks",
2841 "-u dump core after parsing program",
2842 "-U allow unsafe operations",
2843 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2844 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2845 "-w enable many useful warnings (RECOMMENDED)",
2846 "-W enable all warnings",
2847 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2848 "-X disable all warnings",
2852 const char * const *p = usage_msg;
2854 PerlIO_printf(PerlIO_stdout(),
2855 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2858 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2861 /* convert a string of -D options (or digits) into an int.
2862 * sets *s to point to the char after the options */
2866 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2868 static const char * const usage_msgd[] = {
2869 " Debugging flag values: (see also -d)",
2870 " p Tokenizing and parsing (with v, displays parse stack)",
2871 " s Stack snapshots (with v, displays all stacks)",
2872 " l Context (loop) stack processing",
2873 " t Trace execution",
2874 " o Method and overloading resolution",
2875 " c String/numeric conversions",
2876 " P Print profiling info, preprocessor command for -P, source file input state",
2877 " m Memory allocation",
2878 " f Format processing",
2879 " r Regular expression parsing and execution",
2880 " x Syntax tree dump",
2881 " u Tainting checks",
2882 " H Hash dump -- usurps values()",
2883 " X Scratchpad allocation",
2885 " S Thread synchronization",
2887 " R Include reference counts of dumped variables (eg when using -Ds)",
2888 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2889 " v Verbose: use in conjunction with other flags",
2891 " A Consistency checks on internal structures",
2892 " q quiet - currently only suppresses the 'EXECUTING' message",
2897 /* if adding extra options, remember to update DEBUG_MASK */
2898 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2900 for (; isALNUM(**s); (*s)++) {
2901 const char * const d = strchr(debopts,**s);
2903 i |= 1 << (d - debopts);
2904 else if (ckWARN_d(WARN_DEBUGGING))
2905 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2906 "invalid option -D%c, use -D'' to see choices\n", **s);
2909 else if (isDIGIT(**s)) {
2911 for (; isALNUM(**s); (*s)++) ;
2913 else if (givehelp) {
2914 const char *const *p = usage_msgd;
2915 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2918 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2919 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2920 "-Dp not implemented on this platform\n");
2926 /* This routine handles any switches that can be given during run */
2929 Perl_moreswitches(pTHX_ char *s)
2940 SvREFCNT_dec(PL_rs);
2941 if (s[1] == 'x' && s[2]) {
2942 const char *e = s+=2;
2948 flags = PERL_SCAN_SILENT_ILLDIGIT;
2949 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2950 if (s + numlen < e) {
2951 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2955 PL_rs = newSVpvn("", 0);
2956 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2957 tmps = (U8*)SvPVX(PL_rs);
2958 uvchr_to_utf8(tmps, rschar);
2959 SvCUR_set(PL_rs, UNISKIP(rschar));
2964 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2965 if (rschar & ~((U8)~0))
2966 PL_rs = &PL_sv_undef;
2967 else if (!rschar && numlen >= 2)
2968 PL_rs = newSVpvn("", 0);
2970 char ch = (char)rschar;
2971 PL_rs = newSVpvn(&ch, 1);
2974 sv_setsv(get_sv("/", TRUE), PL_rs);
2979 PL_unicode = parse_unicode_opts( (const char **)&s );
2984 while (*s && !isSPACE(*s)) ++s;
2986 PL_splitstr = savepv(PL_splitstr);
3000 /* -dt indicates to the debugger that threads will be used */
3001 if (*s == 't' && !isALNUM(s[1])) {
3003 my_setenv("PERL5DB_THREADED", "1");
3006 /* The following permits -d:Mod to accepts arguments following an =
3007 in the fashion that -MSome::Mod does. */
3008 if (*s == ':' || *s == '=') {
3010 SV * const sv = newSVpv("use Devel::", 0);
3012 /* We now allow -d:Module=Foo,Bar */
3013 while(isALNUM(*s) || *s==':') ++s;
3015 sv_catpv(sv, start);
3017 sv_catpvn(sv, start, s-start);
3018 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3021 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3024 PL_perldb = PERLDB_ALL;
3033 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3034 #else /* !DEBUGGING */
3035 if (ckWARN_d(WARN_DEBUGGING))
3036 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3037 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3038 for (s++; isALNUM(*s); s++) ;
3043 usage(PL_origargv[0]);
3046 Safefree(PL_inplace);
3047 #if defined(__CYGWIN__) /* do backup extension automagically */
3048 if (*(s+1) == '\0') {
3049 PL_inplace = savepv(".bak");
3052 #endif /* __CYGWIN__ */
3053 PL_inplace = savepv(s+1);
3054 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3058 if (*s == '-') /* Additional switches on #! line. */
3062 case 'I': /* -I handled both here and in parse_body() */
3065 while (*s && isSPACE(*s))
3070 /* ignore trailing spaces (possibly followed by other switches) */
3072 for (e = p; *e && !isSPACE(*e); e++) ;
3076 } while (*p && *p != '-');
3077 e = savepvn(s, e-s);
3078 incpush(e, TRUE, TRUE, FALSE, FALSE);
3085 Perl_croak(aTHX_ "No directory specified for -I");
3091 SvREFCNT_dec(PL_ors_sv);
3097 PL_ors_sv = newSVpvn("\n",1);
3098 numlen = 3 + (*s == '0');
3099 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3103 if (RsPARA(PL_rs)) {
3104 PL_ors_sv = newSVpvn("\n\n",2);
3107 PL_ors_sv = newSVsv(PL_rs);
3114 PL_preambleav = newAV();
3117 char * const start = s;
3118 SV * const sv = newSVpv("use assertions::activate", 24);
3119 while(isALNUM(*s) || *s == ':') ++s;
3121 sv_catpvn(sv, "::", 2);
3122 sv_catpvn(sv, start, s-start);
3125 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3128 else if (*s != '\0') {
3129 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3131 av_push(PL_preambleav, sv);
3135 forbid_setid("-M"); /* XXX ? */
3138 forbid_setid("-m"); /* XXX ? */
3142 const char *use = "use ";
3143 /* -M-foo == 'no foo' */
3144 /* Leading space on " no " is deliberate, to make both
3145 possibilities the same length. */
3146 if (*s == '-') { use = " no "; ++s; }
3147 sv = newSVpvn(use,4);
3149 /* We allow -M'Module qw(Foo Bar)' */
3150 while(isALNUM(*s) || *s==':') ++s;
3152 sv_catpv(sv, start);
3153 if (*(start-1) == 'm') {
3155 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3156 sv_catpv( sv, " ()");
3160 Perl_croak(aTHX_ "Module name required with -%c option",
3162 sv_catpvn(sv, start, s-start);
3163 sv_catpv(sv, " split(/,/,q");
3164 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3166 sv_catpvn(sv, "\0)", 2);
3170 PL_preambleav = newAV();
3171 av_push(PL_preambleav, sv);
3174 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3186 PL_doswitches = TRUE;
3200 #ifdef MACOS_TRADITIONAL
3201 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3203 PL_do_undump = TRUE;
3211 if (!sv_derived_from(PL_patchlevel, "version"))
3212 (void *)upg_version(PL_patchlevel);
3214 PerlIO_printf(PerlIO_stdout(),
3215 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
3216 vstringify(PL_patchlevel),
3219 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3220 PerlIO_printf(PerlIO_stdout(),
3221 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3222 vstringify(PL_patchlevel)));
3223 PerlIO_printf(PerlIO_stdout(),
3224 Perl_form(aTHX_ " built under %s at %s %s\n",
3225 OSNAME, __DATE__, __TIME__));
3226 PerlIO_printf(PerlIO_stdout(),
3227 Perl_form(aTHX_ " OS Specific Release: %s\n",
3231 #if defined(LOCAL_PATCH_COUNT)
3232 if (LOCAL_PATCH_COUNT > 0)
3233 PerlIO_printf(PerlIO_stdout(),
3234 "\n(with %d registered patch%s, "
3235 "see perl -V for more detail)",
3236 (int)LOCAL_PATCH_COUNT,
3237 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3240 PerlIO_printf(PerlIO_stdout(),
3241 "\n\nCopyright 1987-2005, Larry Wall\n");
3242 #ifdef MACOS_TRADITIONAL
3243 PerlIO_printf(PerlIO_stdout(),
3244 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3245 "maintained by Chris Nandor\n");
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3254 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3257 PerlIO_printf(PerlIO_stdout(),
3258 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3259 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "atariST series port, ++jrb bammi@cadence.com\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3274 PerlIO_printf(PerlIO_stdout(),
3275 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3278 PerlIO_printf(PerlIO_stdout(),
3279 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "MiNT port by Guido Flohr, 1997-1999\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "EPOC port by Olaf Flebbe, 1999-2002\n");
3298 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3299 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3302 #ifdef __SYMBIAN32__
3303 PerlIO_printf(PerlIO_stdout(),
3304 "Symbian port by Nokia, 2004-2005\n");
3306 #ifdef BINARY_BUILD_NOTICE
3307 BINARY_BUILD_NOTICE;
3309 PerlIO_printf(PerlIO_stdout(),
3311 Perl may be copied only under the terms of either the Artistic License or the\n\
3312 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3313 Complete documentation for Perl, including FAQ lists, should be found on\n\
3314 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3315 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3318 if (! (PL_dowarn & G_WARN_ALL_MASK))
3319 PL_dowarn |= G_WARN_ON;
3323 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3324 if (!specialWARN(PL_compiling.cop_warnings))
3325 SvREFCNT_dec(PL_compiling.cop_warnings);
3326 PL_compiling.cop_warnings = pWARN_ALL ;
3330 PL_dowarn = G_WARN_ALL_OFF;
3331 if (!specialWARN(PL_compiling.cop_warnings))
3332 SvREFCNT_dec(PL_compiling.cop_warnings);
3333 PL_compiling.cop_warnings = pWARN_NONE ;
3338 if (s[1] == '-') /* Additional switches on #! line. */
3343 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3349 #ifdef ALTERNATE_SHEBANG
3350 case 'S': /* OS/2 needs -S on "extproc" line. */
3358 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3363 /* compliments of Tom Christiansen */
3365 /* unexec() can be found in the Gnu emacs distribution */
3366 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3369 Perl_my_unexec(pTHX)
3377 prog = newSVpv(BIN_EXP, 0);
3378 sv_catpv(prog, "/perl");
3379 file = newSVpv(PL_origfilename, 0);
3380 sv_catpv(file, ".perldump");
3382 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3383 /* unexec prints msg to stderr in case of failure */
3384 PerlProc_exit(status);
3387 # include <lib$routines.h>
3388 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3390 ABORT(); /* for use with undump */
3395 /* initialize curinterp */
3401 # define PERLVAR(var,type)
3402 # define PERLVARA(var,n,type)
3403 # if defined(PERL_IMPLICIT_CONTEXT)
3404 # if defined(USE_5005THREADS)
3405 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3406 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3407 # else /* !USE_5005THREADS */
3408 # define PERLVARI(var,type,init) aTHX->var = init;
3409 # define PERLVARIC(var,type,init) aTHX->var = init;
3410 # endif /* USE_5005THREADS */
3412 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3413 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3415 # include "intrpvar.h"
3416 # ifndef USE_5005THREADS
3417 # include "thrdvar.h"
3424 # define PERLVAR(var,type)
3425 # define PERLVARA(var,n,type)
3426 # define PERLVARI(var,type,init) PL_##var = init;
3427 # define PERLVARIC(var,type,init) PL_##var = init;
3428 # include "intrpvar.h"
3429 # ifndef USE_5005THREADS
3430 # include "thrdvar.h"
3441 S_init_main_stash(pTHX)
3445 PL_curstash = PL_defstash = newHV();
3446 PL_curstname = newSVpvn("main",4);
3447 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3448 SvREFCNT_dec(GvHV(gv));
3449 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3451 hv_name_set(PL_defstash, "main", 4, 0);
3452 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3453 SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */
3454 GvMULTI_on(PL_incgv);
3455 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3456 GvMULTI_on(PL_hintgv);
3457 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3458 SvREFCNT_inc(PL_defgv);
3459 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3460 SvREFCNT_inc(PL_errgv);
3461 GvMULTI_on(PL_errgv);
3462 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3463 GvMULTI_on(PL_replgv);
3464 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3465 #ifdef PERL_DONT_CREATE_GVSV
3468 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3469 sv_setpvn(ERRSV, "", 0);
3470 PL_curstash = PL_defstash;
3471 CopSTASH_set(&PL_compiling, PL_defstash);
3472 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3473 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3474 /* We must init $/ before switches are processed. */
3475 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3478 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3480 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3485 const char *cpp_discard_flag;
3494 PL_origfilename = savepvn("-e", 2);
3497 /* if find_script() returns, it returns a malloc()-ed value */
3498 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3500 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3501 const char *s = scriptname + 8;
3502 PL_fdscript = atoi(s);
3507 * Tell apart "normal" usage of fdscript, e.g.
3508 * with bash on FreeBSD:
3509 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3510 * from usage in suidperl.
3511 * Does any "normal" usage leave garbage after the number???
3512 * Is it a mistake to use a similar /dev/fd/ construct for
3517 * Be supersafe and do some sanity-checks.
3518 * Still, can we be sure we got the right thing?
3521 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3524 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3526 scriptname = savepv(s + 1);
3527 Safefree(PL_origfilename);
3528 PL_origfilename = (char *)scriptname;
3533 CopFILE_free(PL_curcop);
3534 CopFILE_set(PL_curcop, PL_origfilename);
3535 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3536 scriptname = (char *)"";
3537 if (PL_fdscript >= 0) {
3538 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3539 # if defined(HAS_FCNTL) && defined(F_SETFD)
3541 /* ensure close-on-exec */
3542 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3547 Perl_croak(aTHX_ "sperl needs fd script\n"
3548 "You should not call sperl directly; do you need to "
3549 "change a #! line\nfrom sperl to perl?\n");
3552 * Do not open (or do other fancy stuff) while setuid.
3553 * Perl does the open, and hands script to suidperl on a fd;
3554 * suidperl only does some checks, sets up UIDs and re-execs
3555 * perl with that fd as it has always done.
3558 if (PL_suidscript != 1) {
3559 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3562 else if (PL_preprocess) {
3563 const char * const cpp_cfg = CPPSTDIN;
3564 SV * const cpp = newSVpvn("",0);
3565 SV * const cmd = NEWSV(0,0);
3567 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3568 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3569 if (strEQ(cpp_cfg, "cppstdin"))
3570 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3571 sv_catpv(cpp, cpp_cfg);
3574 sv_catpvn(sv, "-I", 2);
3575 sv_catpv(sv,PRIVLIB_EXP);
3578 DEBUG_P(PerlIO_printf(Perl_debug_log,
3579 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3580 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3583 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3590 cpp_discard_flag = "";
3592 cpp_discard_flag = "-C";
3596 perl = os2_execname(aTHX);
3598 perl = PL_origargv[0];
3602 /* This strips off Perl comments which might interfere with
3603 the C pre-processor, including #!. #line directives are
3604 deliberately stripped to avoid confusion with Perl's version
3605 of #line. FWP played some golf with it so it will fit
3606 into VMS's 255 character buffer.
3609 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3611 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3613 Perl_sv_setpvf(aTHX_ cmd, "\
3614 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3615 perl, quote, code, quote, scriptname, cpp,
3616 cpp_discard_flag, sv, CPPMINUS);
3618 PL_doextract = FALSE;
3620 DEBUG_P(PerlIO_printf(Perl_debug_log,
3621 "PL_preprocess: cmd=\"%s\"\n",
3624 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3628 else if (!*scriptname) {
3629 forbid_setid("program input from stdin");
3630 PL_rsfp = PerlIO_stdin();
3633 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3634 # if defined(HAS_FCNTL) && defined(F_SETFD)
3636 /* ensure close-on-exec */
3637 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3640 #endif /* IAMSUID */
3642 /* PSz 16 Sep 03 Keep neat error message */
3644 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3646 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3647 CopFILE(PL_curcop), Strerror(errno));
3652 * I_SYSSTATVFS HAS_FSTATVFS
3654 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3655 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3656 * here so that metaconfig picks them up. */
3660 S_fd_on_nosuid_fs(pTHX_ int fd)
3663 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3664 * but is needed also on machines without setreuid.
3665 * Seems safe enough to run as root.
3667 int check_okay = 0; /* able to do all the required sys/libcalls */
3668 int on_nosuid = 0; /* the fd is on a nosuid fs */
3670 * Need to check noexec also: nosuid might not be set, the average
3671 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3673 int on_noexec = 0; /* the fd is on a noexec fs */
3676 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3677 * fstatvfs() is UNIX98.
3678 * fstatfs() is 4.3 BSD.
3679 * ustat()+getmnt() is pre-4.3 BSD.
3680 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3681 * an irrelevant filesystem while trying to reach the right one.
3684 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3686 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3687 defined(HAS_FSTATVFS)
3688 # define FD_ON_NOSUID_CHECK_OKAY
3689 struct statvfs stfs;
3691 check_okay = fstatvfs(fd, &stfs) == 0;
3692 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3694 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3695 on platforms where it is present. */
3696 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3698 # endif /* fstatvfs */
3700 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3701 defined(PERL_MOUNT_NOSUID) && \
3702 defined(PERL_MOUNT_NOEXEC) && \
3703 defined(HAS_FSTATFS) && \
3704 defined(HAS_STRUCT_STATFS) && \
3705 defined(HAS_STRUCT_STATFS_F_FLAGS)
3706 # define FD_ON_NOSUID_CHECK_OKAY
3709 check_okay = fstatfs(fd, &stfs) == 0;
3710 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3711 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3712 # endif /* fstatfs */
3714 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3715 defined(PERL_MOUNT_NOSUID) && \
3716 defined(PERL_MOUNT_NOEXEC) && \
3717 defined(HAS_FSTAT) && \
3718 defined(HAS_USTAT) && \
3719 defined(HAS_GETMNT) && \
3720 defined(HAS_STRUCT_FS_DATA) && \
3722 # define FD_ON_NOSUID_CHECK_OKAY
3725 if (fstat(fd, &fdst) == 0) {
3727 if (ustat(fdst.st_dev, &us) == 0) {
3729 /* NOSTAT_ONE here because we're not examining fields which
3730 * vary between that case and STAT_ONE. */
3731 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3732 size_t cmplen = sizeof(us.f_fname);
3733 if (sizeof(fsd.fd_req.path) < cmplen)
3734 cmplen = sizeof(fsd.fd_req.path);
3735 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3736 fdst.st_dev == fsd.fd_req.dev) {
3738 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3739 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3744 # endif /* fstat+ustat+getmnt */
3746 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3747 defined(HAS_GETMNTENT) && \
3748 defined(HAS_HASMNTOPT) && \
3749 defined(MNTOPT_NOSUID) && \
3750 defined(MNTOPT_NOEXEC)
3751 # define FD_ON_NOSUID_CHECK_OKAY
3752 FILE *mtab = fopen("/etc/mtab", "r");
3753 struct mntent *entry;
3756 if (mtab && (fstat(fd, &stb) == 0)) {
3757 while (entry = getmntent(mtab)) {
3758 if (stat(entry->mnt_dir, &fsb) == 0
3759 && fsb.st_dev == stb.st_dev)
3761 /* found the filesystem */
3763 if (hasmntopt(entry, MNTOPT_NOSUID))
3765 if (hasmntopt(entry, MNTOPT_NOEXEC))
3768 } /* A single fs may well fail its stat(). */
3773 # endif /* getmntent+hasmntopt */
3776 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3778 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3780 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3781 return ((!check_okay) || on_nosuid || on_noexec);
3783 #endif /* IAMSUID */
3786 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3791 #endif /* IAMSUID */
3793 /* do we need to emulate setuid on scripts? */
3795 /* This code is for those BSD systems that have setuid #! scripts disabled
3796 * in the kernel because of a security problem. Merely defining DOSUID
3797 * in perl will not fix that problem, but if you have disabled setuid
3798 * scripts in the kernel, this will attempt to emulate setuid and setgid
3799 * on scripts that have those now-otherwise-useless bits set. The setuid
3800 * root version must be called suidperl or sperlN.NNN. If regular perl
3801 * discovers that it has opened a setuid script, it calls suidperl with
3802 * the same argv that it had. If suidperl finds that the script it has
3803 * just opened is NOT setuid root, it sets the effective uid back to the
3804 * uid. We don't just make perl setuid root because that loses the
3805 * effective uid we had before invoking perl, if it was different from the
3808 * Description/comments above do not match current workings:
3809 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3810 * suidperl called with script open and name changed to /dev/fd/N/X;
3811 * suidperl croaks if script is not setuid;
3812 * making perl setuid would be a huge security risk (and yes, that
3813 * would lose any euid we might have had).
3815 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3816 * be defined in suidperl only. suidperl must be setuid root. The
3817 * Configure script will set this up for you if you want it.
3823 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3824 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3825 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3827 const char *linestr;
3831 if (PL_fdscript < 0 || PL_suidscript != 1)
3832 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3834 * Since the script is opened by perl, not suidperl, some of these
3835 * checks are superfluous. Leaving them in probably does not lower
3839 * Do checks even for systems with no HAS_SETREUID.
3840 * We used to swap, then re-swap UIDs with
3842 if (setreuid(PL_euid,PL_uid) < 0
3843 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3844 Perl_croak(aTHX_ "Can't swap uid and euid");
3847 if (setreuid(PL_uid,PL_euid) < 0
3848 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3849 Perl_croak(aTHX_ "Can't reswap uid and euid");
3853 /* On this access check to make sure the directories are readable,
3854 * there is actually a small window that the user could use to make
3855 * filename point to an accessible directory. So there is a faint
3856 * chance that someone could execute a setuid script down in a
3857 * non-accessible directory. I don't know what to do about that.
3858 * But I don't think it's too important. The manual lies when
3859 * it says access() is useful in setuid programs.
3861 * So, access() is pretty useless... but not harmful... do anyway.
3863 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3864 Perl_croak(aTHX_ "Can't access() script\n");
3867 /* If we can swap euid and uid, then we can determine access rights
3868 * with a simple stat of the file, and then compare device and
3869 * inode to make sure we did stat() on the same file we opened.
3870 * Then we just have to make sure he or she can execute it.
3873 * As the script is opened by perl, not suidperl, we do not need to
3874 * care much about access rights.
3876 * The 'script changed' check is needed, or we can get lied to
3877 * about $0 with e.g.
3878 * suidperl /dev/fd/4//bin/x 4<setuidscript
3879 * Without HAS_SETREUID, is it safe to stat() as root?
3881 * Are there any operating systems that pass /dev/fd/xxx for setuid
3882 * scripts, as suggested/described in perlsec(1)? Surely they do not
3883 * pass the script name as we do, so the "script changed" test would
3884 * fail for them... but we never get here with
3885 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3887 * This is one place where we must "lie" about return status: not
3888 * say if the stat() failed. We are doing this as root, and could
3889 * be tricked into reporting existence or not of files that the
3890 * "plain" user cannot even see.
3894 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3895 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3896 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3897 Perl_croak(aTHX_ "Setuid script changed\n");
3901 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3902 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3905 * We used to do this check as the "plain" user (after swapping
3906 * UIDs). But the check for nosuid and noexec filesystem is needed,
3907 * and should be done even without HAS_SETREUID. (Maybe those
3908 * operating systems do not have such mount options anyway...)
3909 * Seems safe enough to do as root.
3911 #if !defined(NO_NOSUID_CHECK)
3912 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3913 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3916 #endif /* IAMSUID */
3918 if (!S_ISREG(PL_statbuf.st_mode)) {
3919 Perl_croak(aTHX_ "Setuid script not plain file\n");
3921 if (PL_statbuf.st_mode & S_IWOTH)
3922 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3923 PL_doswitches = FALSE; /* -s is insecure in suid */
3924 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3925 CopLINE_inc(PL_curcop);
3926 linestr = SvPV_nolen_const(PL_linestr);
3927 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3928 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3929 Perl_croak(aTHX_ "No #! line");
3933 /* Sanity check on line length */
3934 s_end = s + strlen(s);
3935 if (s_end == s || (s_end - s) > 4000)
3936 Perl_croak(aTHX_ "Very long #! line");
3937 /* Allow more than a single space after #! */
3938 while (isSPACE(*s)) s++;
3939 /* Sanity check on buffer end */
3940 while ((*s) && !isSPACE(*s)) s++;
3941 for (s2 = s; (s2 > linestr &&
3942 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3943 || s2[-1] == '-')); s2--) ;
3944 /* Sanity check on buffer start */
3945 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3946 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3947 Perl_croak(aTHX_ "Not a perl script");
3948 while (*s == ' ' || *s == '\t') s++;
3950 * #! arg must be what we saw above. They can invoke it by
3951 * mentioning suidperl explicitly, but they may not add any strange
3952 * arguments beyond what #! says if they do invoke suidperl that way.
3955 * The way validarg was set up, we rely on the kernel to start
3956 * scripts with argv[1] set to contain all #! line switches (the
3960 * Check that we got all the arguments listed in the #! line (not
3961 * just that there are no extraneous arguments). Might not matter
3962 * much, as switches from #! line seem to be acted upon (also), and
3963 * so may be checked and trapped in perl. But, security checks must
3964 * be done in suidperl and not deferred to perl. Note that suidperl
3965 * does not get around to parsing (and checking) the switches on
3966 * the #! line (but execs perl sooner).
3967 * Allow (require) a trailing newline (which may be of two
3968 * characters on some architectures?) (but no other trailing
3971 len = strlen(validarg);
3972 if (strEQ(validarg," PHOOEY ") ||
3973 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3974 !((s_end - s) == len+1
3975 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3976 Perl_croak(aTHX_ "Args must match #! line");
3979 if (PL_fdscript < 0 &&
3980 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3981 PL_euid == PL_statbuf.st_uid)
3983 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3984 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3985 #endif /* IAMSUID */
3987 if (PL_fdscript < 0 &&
3988 PL_euid) { /* oops, we're not the setuid root perl */
3990 * When root runs a setuid script, we do not go through the same
3991 * steps of execing sperl and then perl with fd scripts, but
3992 * simply set up UIDs within the same perl invocation; so do
3993 * not have the same checks (on options, whatever) that we have
3994 * for plain users. No problem really: would have to be a script
3995 * that does not actually work for plain users; and if root is
3996 * foolish and can be persuaded to run such an unsafe script, he
3997 * might run also non-setuid ones, and deserves what he gets.
3999 * Or, we might drop the PL_euid check above (and rely just on
4000 * PL_fdscript to avoid loops), and do the execs
4006 * Pass fd script to suidperl.
4007 * Exec suidperl, substituting fd script for scriptname.
4008 * Pass script name as "subdir" of fd, which perl will grok;
4009 * in fact will use that to distinguish this from "normal"
4010 * usage, see comments above.
4012 PerlIO_rewind(PL_rsfp);
4013 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4014 /* PSz 27 Feb 04 Sanity checks on scriptname */
4015 if ((!scriptname) || (!*scriptname) ) {
4016 Perl_croak(aTHX_ "No setuid script name\n");
4018 if (*scriptname == '-') {
4019 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4020 /* Or we might confuse it with an option when replacing
4021 * name in argument list, below (though we do pointer, not
4022 * string, comparisons).
4025 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4026 if (!PL_origargv[which]) {
4027 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4029 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4030 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4031 #if defined(HAS_FCNTL) && defined(F_SETFD)
4032 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4035 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4036 (int)PERL_REVISION, (int)PERL_VERSION,
4037 (int)PERL_SUBVERSION), PL_origargv);
4039 #endif /* IAMSUID */
4040 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4043 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4045 * This seems back to front: we try HAS_SETEGID first; if not available
4046 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4047 * in the sense that we only want to set EGID; but are there any machines
4048 * with either of the latter, but not the former? Same with UID, later.
4051 (void)setegid(PL_statbuf.st_gid);
4054 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4056 #ifdef HAS_SETRESGID
4057 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4059 PerlProc_setgid(PL_statbuf.st_gid);
4063 if (PerlProc_getegid() != PL_statbuf.st_gid)
4064 Perl_croak(aTHX_ "Can't do setegid!\n");
4066 if (PL_statbuf.st_mode & S_ISUID) {
4067 if (PL_statbuf.st_uid != PL_euid)
4069 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4072 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4074 #ifdef HAS_SETRESUID
4075 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4077 PerlProc_setuid(PL_statbuf.st_uid);
4081 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4082 Perl_croak(aTHX_ "Can't do seteuid!\n");
4084 else if (PL_uid) { /* oops, mustn't run as root */
4086 (void)seteuid((Uid_t)PL_uid);
4089 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4091 #ifdef HAS_SETRESUID
4092 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4094 PerlProc_setuid((Uid_t)PL_uid);
4098 if (PerlProc_geteuid() != PL_uid)
4099 Perl_croak(aTHX_ "Can't do seteuid!\n");
4102 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4103 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4106 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4107 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4108 else if (PL_fdscript < 0 || PL_suidscript != 1)
4109 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4110 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4112 /* PSz 16 Sep 03 Keep neat error message */
4113 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4116 /* We absolutely must clear out any saved ids here, so we */
4117 /* exec the real perl, substituting fd script for scriptname. */
4118 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4120 * It might be thought that using setresgid and/or setresuid (changed to
4121 * set the saved IDs) above might obviate the need to exec, and we could
4122 * go on to "do the perl thing".
4124 * Is there such a thing as "saved GID", and is that set for setuid (but
4125 * not setgid) execution like suidperl? Without exec, it would not be
4126 * cleared for setuid (but not setgid) scripts (or might need a dummy
4129 * We need suidperl to do the exact same argument checking that perl
4130 * does. Thus it cannot be very small; while it could be significantly
4131 * smaller, it is safer (simpler?) to make it essentially the same
4132 * binary as perl (but they are not identical). - Maybe could defer that
4133 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4134 * but prefer to do thorough checks in suidperl itself. Such deferral
4135 * would make suidperl security rely on perl, a design no-no.
4137 * Setuid things should be short and simple, thus easy to understand and
4138 * verify. They should do their "own thing", without influence by
4139 * attackers. It may help if their internal execution flow is fixed,
4140 * regardless of platform: it may be best to exec anyway.
4142 * Suidperl should at least be conceptually simple: a wrapper only,
4143 * never to do any real perl. Maybe we should put
4145 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4147 * into the perly bits.
4149 PerlIO_rewind(PL_rsfp);
4150 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4152 * Keep original arguments: suidperl already has fd script.
4154 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4155 /* if (!PL_origargv[which]) { */
4156 /* errno = EPERM; */
4157 /* Perl_croak(aTHX_ "Permission denied\n"); */
4159 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4160 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4161 #if defined(HAS_FCNTL) && defined(F_SETFD)
4162 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4165 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4166 (int)PERL_REVISION, (int)PERL_VERSION,
4167 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4169 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4170 #endif /* IAMSUID */
4172 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4173 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4174 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4175 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4177 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4180 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4181 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4182 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4183 /* not set-id, must be wrapped */
4191 S_find_beginning(pTHX)
4194 register const char *s2;
4195 #ifdef MACOS_TRADITIONAL
4199 /* skip forward in input to the real script? */
4202 #ifdef MACOS_TRADITIONAL
4203 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4205 while (PL_doextract || gMacPerl_AlwaysExtract) {
4206 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4207 if (!gMacPerl_AlwaysExtract)
4208 Perl_croak(aTHX_ "No Perl script found in input\n");
4210 if (PL_doextract) /* require explicit override ? */
4211 if (!OverrideExtract(PL_origfilename))
4212 Perl_croak(aTHX_ "User aborted script\n");
4214 PL_doextract = FALSE;
4216 /* Pater peccavi, file does not have #! */
4217 PerlIO_rewind(PL_rsfp);
4222 while (PL_doextract) {
4223 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4224 Perl_croak(aTHX_ "No Perl script found in input\n");
4227 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4228 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4229 PL_doextract = FALSE;
4230 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4232 while (*s == ' ' || *s == '\t') s++;
4234 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4235 || s2[-1] == '_') s2--;
4236 if (strnEQ(s2-4,"perl",4))
4237 while ((s = moreswitches(s)))
4240 #ifdef MACOS_TRADITIONAL
4241 /* We are always searching for the #!perl line in MacPerl,
4242 * so if we find it, still keep the line count correct
4243 * by counting lines we already skipped over
4245 for (; maclines > 0 ; maclines--)
4246 PerlIO_ungetc(PL_rsfp, '\n');
4250 /* gMacPerl_AlwaysExtract is false in MPW tool */
4251 } else if (gMacPerl_AlwaysExtract) {
4262 PL_uid = PerlProc_getuid();
4263 PL_euid = PerlProc_geteuid();
4264 PL_gid = PerlProc_getgid();
4265 PL_egid = PerlProc_getegid();
4267 PL_uid |= PL_gid << 16;
4268 PL_euid |= PL_egid << 16;
4270 /* Should not happen: */
4271 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4272 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4275 * Should go by suidscript, not uid!=euid: why disallow
4276 * system("ls") in scripts run from setuid things?
4277 * Or, is this run before we check arguments and set suidscript?
4278 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4279 * (We never have suidscript, can we be sure to have fdscript?)
4280 * Or must then go by UID checks? See comments in forbid_setid also.
4284 /* This is used very early in the lifetime of the program,
4285 * before even the options are parsed, so PL_tainting has
4286 * not been initialized properly. */
4288 Perl_doing_taint(int argc, char *argv[], char *envp[])
4290 #ifndef PERL_IMPLICIT_SYS
4291 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4292 * before we have an interpreter-- and the whole point of this
4293 * function is to be called at such an early stage. If you are on
4294 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4295 * "tainted because running with altered effective ids', you'll
4296 * have to add your own checks somewhere in here. The two most
4297 * known samples of 'implicitness' are Win32 and NetWare, neither
4298 * of which has much of concept of 'uids'. */
4299 int uid = PerlProc_getuid();
4300 int euid = PerlProc_geteuid();
4301 int gid = PerlProc_getgid();
4302 int egid = PerlProc_getegid();
4309 if (uid && (euid != uid || egid != gid))
4311 #endif /* !PERL_IMPLICIT_SYS */
4312 /* This is a really primitive check; environment gets ignored only
4313 * if -T are the first chars together; otherwise one gets
4314 * "Too late" message. */
4315 if ( argc > 1 && argv[1][0] == '-'
4316 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4322 S_forbid_setid(pTHX_ const char *s)
4324 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4325 if (PL_euid != PL_uid)
4326 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4327 if (PL_egid != PL_gid)
4328 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4329 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4331 * Checks for UID/GID above "wrong": why disallow
4332 * perl -e 'print "Hello\n"'
4333 * from within setuid things?? Simply drop them: replaced by
4334 * fdscript/suidscript and #ifdef IAMSUID checks below.
4336 * This may be too late for command-line switches. Will catch those on
4337 * the #! line, after finding the script name and setting up
4338 * fdscript/suidscript. Note that suidperl does not get around to
4339 * parsing (and checking) the switches on the #! line, but checks that
4340 * the two sets are identical.
4342 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4343 * instead, or would that be "too late"? (We never have suidscript, can
4344 * we be sure to have fdscript?)
4346 * Catch things with suidscript (in descendant of suidperl), even with
4347 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4348 * below; but I am paranoid.
4350 * Also see comments about root running a setuid script, elsewhere.
4352 if (PL_suidscript >= 0)
4353 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4355 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4356 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4357 #endif /* IAMSUID */
4361 Perl_init_debugger(pTHX)
4363 HV * const ostash = PL_curstash;
4365 PL_curstash = PL_debstash;
4366 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4367 AvREAL_off(PL_dbargs);
4368 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4369 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4370 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4371 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4372 sv_setiv(PL_DBsingle, 0);
4373 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4374 sv_setiv(PL_DBtrace, 0);
4375 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4376 sv_setiv(PL_DBsignal, 0);
4377 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4378 sv_setiv(PL_DBassertion, 0);
4379 PL_curstash = ostash;
4382 #ifndef STRESS_REALLOC
4383 #define REASONABLE(size) (size)
4385 #define REASONABLE(size) (1) /* unreasonable */
4389 Perl_init_stacks(pTHX)
4391 /* start with 128-item stack and 8K cxstack */
4392 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4393 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4394 PL_curstackinfo->si_type = PERLSI_MAIN;
4395 PL_curstack = PL_curstackinfo->si_stack;
4396 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4398 PL_stack_base = AvARRAY(PL_curstack);
4399 PL_stack_sp = PL_stack_base;
4400 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4402 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4405 PL_tmps_max = REASONABLE(128);
4407 Newx(PL_markstack,REASONABLE(32),I32);
4408 PL_markstack_ptr = PL_markstack;
4409 PL_markstack_max = PL_markstack + REASONABLE(32);
4413 Newx(PL_scopestack,REASONABLE(32),I32);
4414 PL_scopestack_ix = 0;
4415 PL_scopestack_max = REASONABLE(32);
4417 Newx(PL_savestack,REASONABLE(128),ANY);
4418 PL_savestack_ix = 0;
4419 PL_savestack_max = REASONABLE(128);
4427 while (PL_curstackinfo->si_next)
4428 PL_curstackinfo = PL_curstackinfo->si_next;
4429 while (PL_curstackinfo) {
4430 PERL_SI *p = PL_curstackinfo->si_prev;
4431 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4432 Safefree(PL_curstackinfo->si_cxstack);
4433 Safefree(PL_curstackinfo);
4434 PL_curstackinfo = p;
4436 Safefree(PL_tmps_stack);
4437 Safefree(PL_markstack);
4438 Safefree(PL_scopestack);
4439 Safefree(PL_savestack);
4448 lex_start(PL_linestr);
4450 PL_subname = newSVpvn("main",4);
4454 S_init_predump_symbols(pTHX)
4459 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4460 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4461 GvMULTI_on(PL_stdingv);
4462 io = GvIOp(PL_stdingv);
4463 IoTYPE(io) = IoTYPE_RDONLY;
4464 IoIFP(io) = PerlIO_stdin();
4465 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4467 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4469 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4472 IoTYPE(io) = IoTYPE_WRONLY;
4473 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4475 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4477 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4479 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4480 GvMULTI_on(PL_stderrgv);
4481 io = GvIOp(PL_stderrgv);
4482 IoTYPE(io) = IoTYPE_WRONLY;
4483 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4484 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4486 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4488 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4490 Safefree(PL_osname);
4491 PL_osname = savepv(OSNAME);
4495 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4497 argc--,argv++; /* skip name of script */
4498 if (PL_doswitches) {
4499 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4503 if (argv[0][1] == '-' && !argv[0][2]) {
4507 if ((s = strchr(argv[0], '='))) {
4509 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4512 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4515 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4516 GvMULTI_on(PL_argvgv);
4517 (void)gv_AVadd(PL_argvgv);
4518 av_clear(GvAVn(PL_argvgv));
4519 for (; argc > 0; argc--,argv++) {
4520 SV * const sv = newSVpv(argv[0],0);
4521 av_push(GvAVn(PL_argvgv),sv);
4522 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4523 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4526 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4527 (void)sv_utf8_decode(sv);
4533 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4538 PL_toptarget = NEWSV(0,0);
4539 sv_upgrade(PL_toptarget, SVt_PVFM);
4540 sv_setpvn(PL_toptarget, "", 0);
4541 PL_bodytarget = NEWSV(0,0);
4542 sv_upgrade(PL_bodytarget, SVt_PVFM);
4543 sv_setpvn(PL_bodytarget, "", 0);
4544 PL_formtarget = PL_bodytarget;
4548 init_argv_symbols(argc,argv);
4550 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4551 #ifdef MACOS_TRADITIONAL
4552 /* $0 is not majick on a Mac */
4553 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4555 sv_setpv(GvSV(tmpgv),PL_origfilename);
4556 magicname("0", "0", 1);
4559 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4561 GvMULTI_on(PL_envgv);
4562 hv = GvHVn(PL_envgv);
4563 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4565 #ifdef USE_ENVIRON_ARRAY
4566 /* Note that if the supplied env parameter is actually a copy
4567 of the global environ then it may now point to free'd memory
4568 if the environment has been modified since. To avoid this
4569 problem we treat env==NULL as meaning 'use the default'
4574 # ifdef USE_ITHREADS
4575 && PL_curinterp == aTHX
4579 environ[0] = Nullch;
4582 char** origenv = environ;
4585 for (; *env; env++) {
4586 if (!(s = strchr(*env,'=')) || s == *env)
4588 #if defined(MSDOS) && !defined(DJGPP)
4593 sv = newSVpv(s+1, 0);
4594 (void)hv_store(hv, *env, s - *env, sv, 0);
4597 if (origenv != environ) {
4598 /* realloc has shifted us */
4599 env = (env - origenv) + environ;
4604 #endif /* USE_ENVIRON_ARRAY */
4605 #endif /* !PERL_MICRO */
4608 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4609 SvREADONLY_off(GvSV(tmpgv));
4610 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4611 SvREADONLY_on(GvSV(tmpgv));
4613 #ifdef THREADS_HAVE_PIDS
4614 PL_ppid = (IV)getppid();
4617 /* touch @F array to prevent spurious warnings 20020415 MJD */
4619 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4621 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4622 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4623 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4627 S_init_perllib(pTHX)
4632 s = PerlEnv_getenv("PERL5LIB");
4634 * It isn't possible to delete an environment variable with
4635 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4636 * case we treat PERL5LIB as undefined if it has a zero-length value.
4638 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4639 if (s && *s != '\0')
4643 incpush(s, TRUE, TRUE, TRUE, FALSE);
4645 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4647 /* Treat PERL5?LIB as a possible search list logical name -- the
4648 * "natural" VMS idiom for a Unix path string. We allow each
4649 * element to be a set of |-separated directories for compatibility.
4653 if (my_trnlnm("PERL5LIB",buf,0))
4654 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4656 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4660 /* Use the ~-expanded versions of APPLLIB (undocumented),
4661 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4664 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4668 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4670 #ifdef MACOS_TRADITIONAL
4673 SV * privdir = NEWSV(55, 0);
4674 char * macperl = PerlEnv_getenv("MACPERL");
4679 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4680 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4681 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4682 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4683 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4684 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4686 SvREFCNT_dec(privdir);
4689 incpush(":", FALSE, FALSE, TRUE, FALSE);
4692 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4695 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4697 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4701 /* sitearch is always relative to sitelib on Windows for
4702 * DLL-based path intuition to work correctly */
4703 # if !defined(WIN32)
4704 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4710 /* this picks up sitearch as well */
4711 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4713 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4717 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4718 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4721 #ifdef PERL_VENDORARCH_EXP
4722 /* vendorarch is always relative to vendorlib on Windows for
4723 * DLL-based path intuition to work correctly */
4724 # if !defined(WIN32)
4725 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4729 #ifdef PERL_VENDORLIB_EXP
4731 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4733 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4737 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4738 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4741 #ifdef PERL_OTHERLIBDIRS
4742 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4746 incpush(".", FALSE, FALSE, TRUE, FALSE);
4747 #endif /* MACOS_TRADITIONAL */
4750 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4751 # define PERLLIB_SEP ';'
4754 # define PERLLIB_SEP '|'
4756 # if defined(MACOS_TRADITIONAL)
4757 # define PERLLIB_SEP ','
4759 # define PERLLIB_SEP ':'
4763 #ifndef PERLLIB_MANGLE
4764 # define PERLLIB_MANGLE(s,n) (s)
4767 /* Push a directory onto @INC if it exists.
4768 Generate a new SV if we do this, to save needing to copy the SV we push
4771 S_incpush_if_exists(pTHX_ SV *dir)
4774 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4775 S_ISDIR(tmpstatbuf.st_mode)) {
4776 av_push(GvAVn(PL_incgv), dir);
4783 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4786 SV *subdir = Nullsv;
4787 const char *p = dir;
4792 if (addsubdirs || addoldvers) {
4793 subdir = NEWSV(0,0);
4796 /* Break at all separators */
4798 SV *libdir = NEWSV(55,0);
4801 /* skip any consecutive separators */
4803 while ( *p == PERLLIB_SEP ) {
4804 /* Uncomment the next line for PATH semantics */
4805 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4810 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4811 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4816 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4817 p = Nullch; /* break out */
4819 #ifdef MACOS_TRADITIONAL
4820 if (!strchr(SvPVX(libdir), ':')) {
4823 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4825 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4826 sv_catpv(libdir, ":");
4829 /* Do the if() outside the #ifdef to avoid warnings about an unused
4832 #ifdef PERL_RELOCATABLE_INC
4834 * Relocatable include entries are marked with a leading .../
4837 * 0: Remove that leading ".../"
4838 * 1: Remove trailing executable name (anything after the last '/')
4839 * from the perl path to give a perl prefix
4841 * While the @INC element starts "../" and the prefix ends with a real
4842 * directory (ie not . or ..) chop that real directory off the prefix
4843 * and the leading "../" from the @INC element. ie a logical "../"
4845 * Finally concatenate the prefix and the remainder of the @INC element
4846 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4847 * generates /usr/local/lib/perl5
4849 const char *libpath = SvPVX(libdir);
4850 STRLEN libpath_len = SvCUR(libdir);
4851 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4853 SV * const caret_X = get_sv("\030", 0);
4854 /* Going to use the SV just as a scratch buffer holding a C
4860 /* $^X is *the* source of taint if tainting is on, hence
4861 SvPOK() won't be true. */
4863 assert(SvPOKp(caret_X));
4864 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4865 /* Firstly take off the leading .../
4866 If all else fail we'll do the paths relative to the current
4868 sv_chop(libdir, libpath + 4);
4869 /* Don't use SvPV as we're intentionally bypassing taining,
4870 mortal copies that the mg_get of tainting creates, and
4871 corruption that seems to come via the save stack.
4872 I guess that the save stack isn't correctly set up yet. */
4873 libpath = SvPVX(libdir);
4874 libpath_len = SvCUR(libdir);
4876 /* This would work more efficiently with memrchr, but as it's
4877 only a GNU extension we'd need to probe for it and
4878 implement our own. Not hard, but maybe not worth it? */
4880 prefix = SvPVX(prefix_sv);
4881 lastslash = strrchr(prefix, '/');
4883 /* First time in with the *lastslash = '\0' we just wipe off
4884 the trailing /perl from (say) /usr/foo/bin/perl
4888 while ((*lastslash = '\0'), /* Do that, come what may. */
4889 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4890 && (lastslash = strrchr(prefix, '/')))) {
4891 if (lastslash[1] == '\0'
4892 || (lastslash[1] == '.'
4893 && (lastslash[2] == '/' /* ends "/." */
4894 || (lastslash[2] == '/'
4895 && lastslash[3] == '/' /* or "/.." */
4897 /* Prefix ends "/" or "/." or "/..", any of which
4898 are fishy, so don't do any more logical cleanup.
4902 /* Remove leading "../" from path */
4905 /* Next iteration round the loop removes the last
4906 directory name from prefix by writing a '\0' in
4907 the while clause. */
4909 /* prefix has been terminated with a '\0' to the correct
4910 length. libpath points somewhere into the libdir SV.
4911 We need to join the 2 with '/' and drop the result into
4913 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4914 SvREFCNT_dec(libdir);
4915 /* And this is the new libdir. */
4918 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4919 /* Need to taint reloccated paths if running set ID */
4920 SvTAINTED_on(libdir);
4923 SvREFCNT_dec(prefix_sv);
4928 * BEFORE pushing libdir onto @INC we may first push version- and
4929 * archname-specific sub-directories.
4931 if (addsubdirs || addoldvers) {
4932 #ifdef PERL_INC_VERSION_LIST
4933 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4934 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4935 const char * const *incver;
4941 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4943 while (unix[len-1] == '/') len--; /* Cosmetic */
4944 sv_usepvn(libdir,unix,len);
4947 PerlIO_printf(Perl_error_log,
4948 "Failed to unixify @INC element \"%s\"\n",
4952 #ifdef MACOS_TRADITIONAL
4953 #define PERL_AV_SUFFIX_FMT ""
4954 #define PERL_ARCH_FMT "%s:"
4955 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4957 #define PERL_AV_SUFFIX_FMT "/"
4958 #define PERL_ARCH_FMT "/%s"
4959 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4961 /* .../version/archname if -d .../version/archname */
4962 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4964 (int)PERL_REVISION, (int)PERL_VERSION,
4965 (int)PERL_SUBVERSION, ARCHNAME);
4966 subdir = S_incpush_if_exists(aTHX_ subdir);
4968 /* .../version if -d .../version */
4969 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4970 (int)PERL_REVISION, (int)PERL_VERSION,
4971 (int)PERL_SUBVERSION);
4972 subdir = S_incpush_if_exists(aTHX_ subdir);
4974 /* .../archname if -d .../archname */
4975 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4976 subdir = S_incpush_if_exists(aTHX_ subdir);
4980 #ifdef PERL_INC_VERSION_LIST
4982 for (incver = incverlist; *incver; incver++) {
4983 /* .../xxx if -d .../xxx */
4984 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4985 subdir = S_incpush_if_exists(aTHX_ subdir);
4991 /* finally push this lib directory on the end of @INC */
4992 av_push(GvAVn(PL_incgv), libdir);
4995 assert (SvREFCNT(subdir) == 1);
4996 SvREFCNT_dec(subdir);
5000 #ifdef USE_5005THREADS
5001 STATIC struct perl_thread *
5002 S_init_main_thread(pTHX)
5004 #if !defined(PERL_IMPLICIT_CONTEXT)
5005 struct perl_thread *thr;
5009 Newxz(thr, 1, struct perl_thread);
5010 PL_curcop = &PL_compiling;
5011 thr->interp = PERL_GET_INTERP;
5012 thr->cvcache = newHV();
5013 thr->threadsv = newAV();
5014 /* thr->threadsvp is set when find_threadsv is called */
5015 thr->specific = newAV();
5016 thr->flags = THRf_R_JOINABLE;
5017 MUTEX_INIT(&thr->mutex);
5018 /* Handcraft thrsv similarly to mess_sv */
5019 Newx(PL_thrsv, 1, SV);
5021 SvFLAGS(PL_thrsv) = SVt_PV;
5022 SvANY(PL_thrsv) = (void*)xpv;
5023 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5024 SvPV_set(PL_thrsvr, (char*)thr);
5025 SvCUR_set(PL_thrsv, sizeof(thr));
5026 SvLEN_set(PL_thrsv, sizeof(thr));
5027 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5028 thr->oursv = PL_thrsv;
5029 PL_chopset = " \n-";
5032 MUTEX_LOCK(&PL_threads_mutex);
5038 MUTEX_UNLOCK(&PL_threads_mutex);
5040 #ifdef HAVE_THREAD_INTERN
5041 Perl_init_thread_intern(thr);
5044 #ifdef SET_THREAD_SELF
5045 SET_THREAD_SELF(thr);
5047 thr->self = pthread_self();
5048 #endif /* SET_THREAD_SELF */
5052 * These must come after the thread self setting
5053 * because sv_setpvn does SvTAINT and the taint
5054 * fields thread selfness being set.
5056 PL_toptarget = NEWSV(0,0);
5057 sv_upgrade(PL_toptarget, SVt_PVFM);
5058 sv_setpvn(PL_toptarget, "", 0);
5059 PL_bodytarget = NEWSV(0,0);
5060 sv_upgrade(PL_bodytarget, SVt_PVFM);
5061 sv_setpvn(PL_bodytarget, "", 0);
5062 PL_formtarget = PL_bodytarget;
5063 thr->errsv = newSVpvn("", 0);
5064 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5067 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5068 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5069 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5070 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5071 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5072 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5074 PL_reginterp_cnt = 0;
5078 #endif /* USE_5005THREADS */
5081 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5085 const line_t oldline = CopLINE(PL_curcop);
5091 while (av_len(paramList) >= 0) {
5092 cv = (CV*)av_shift(paramList);
5094 if (paramList == PL_beginav) {
5095 /* save PL_beginav for compiler */
5096 if (! PL_beginav_save)
5097 PL_beginav_save = newAV();
5098 av_push(PL_beginav_save, (SV*)cv);
5100 else if (paramList == PL_checkav) {
5101 /* save PL_checkav for compiler */
5102 if (! PL_checkav_save)
5103 PL_checkav_save = newAV();
5104 av_push(PL_checkav_save, (SV*)cv);
5114 (void)SvPV_const(atsv, len);
5116 PL_curcop = &PL_compiling;
5117 CopLINE_set(PL_curcop, oldline);
5118 if (paramList == PL_beginav)
5119 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5121 Perl_sv_catpvf(aTHX_ atsv,
5122 "%s failed--call queue aborted",
5123 paramList == PL_checkav ? "CHECK"
5124 : paramList == PL_initav ? "INIT"
5126 while (PL_scopestack_ix > oldscope)
5129 Perl_croak(aTHX_ "%"SVf"", atsv);
5136 /* my_exit() was called */
5137 while (PL_scopestack_ix > oldscope)
5140 PL_curstash = PL_defstash;
5141 PL_curcop = &PL_compiling;
5142 CopLINE_set(PL_curcop, oldline);
5144 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5145 if (paramList == PL_beginav)
5146 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5148 Perl_croak(aTHX_ "%s failed--call queue aborted",
5149 paramList == PL_checkav ? "CHECK"
5150 : paramList == PL_initav ? "INIT"
5157 PL_curcop = &PL_compiling;
5158 CopLINE_set(PL_curcop, oldline);
5161 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5170 S_call_list_body(pTHX_ CV *cv)
5172 PUSHMARK(PL_stack_sp);
5173 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5178 Perl_my_exit(pTHX_ U32 status)
5180 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5181 thr, (unsigned long) status));
5190 STATUS_EXIT_SET(status);
5197 Perl_my_failure_exit(pTHX)
5200 /* We have been called to fall on our sword. The desired exit code
5201 * should be already set in STATUS_UNIX, but could be shifted over
5202 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5205 * If an error code has not been set, then force the issue.
5207 if (MY_POSIX_EXIT) {
5209 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5210 * the exit code when there isn't an error.
5213 if (STATUS_UNIX == 0)
5214 STATUS_UNIX_EXIT_SET(255);
5216 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5218 /* The exit code could have been set by $? or vmsish which
5219 * means that it may not be fatal. So convert
5220 * success/warning codes to fatal.
5222 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5223 STATUS_UNIX_EXIT_SET(255);
5227 /* Traditionally Perl on VMS always expects a Fatal Error. */
5228 if (vaxc$errno & 1) {
5230 /* So force success status to failure */
5231 if (STATUS_NATIVE & 1)
5236 STATUS_UNIX = EINTR; /* In case something cares */
5241 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5243 /* Encode the severity code */
5244 severity = STATUS_NATIVE & STS$M_SEVERITY;
5245 STATUS_UNIX = (severity ? severity : 1) << 8;
5247 /* Perl expects this to be a fatal error */
5248 if (severity != STS$K_SEVERE)
5257 STATUS_UNIX_SET(errno);
5259 exitstatus = STATUS_UNIX >> 8;
5260 if (exitstatus & 255)
5261 STATUS_UNIX_SET(exitstatus);
5263 STATUS_UNIX_SET(255);
5270 S_my_exit_jump(pTHX)
5273 register PERL_CONTEXT *cx;
5278 SvREFCNT_dec(PL_e_script);
5279 PL_e_script = Nullsv;
5282 POPSTACK_TO(PL_mainstack);
5283 if (cxstack_ix >= 0) {
5286 POPBLOCK(cx,PL_curpm);
5291 PERL_UNUSED_VAR(gimme);
5292 PERL_UNUSED_VAR(newsp);
5296 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5298 const char * const p = SvPVX_const(PL_e_script);
5299 const char *nl = strchr(p, '\n');
5301 PERL_UNUSED_ARG(idx);
5302 PERL_UNUSED_ARG(maxlen);
5304 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5306 filter_del(read_e_script);
5309 sv_catpvn(buf_sv, p, nl-p);
5310 sv_chop(PL_e_script, nl);
5316 * c-indentation-style: bsd
5318 * indent-tabs-mode: t
5321 * ex: set ts=8 sts=4 sw=4 noet: