3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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 S_init_tls_and_interp(PerlInterpreter *my_perl)
145 PERL_SET_INTERP(my_perl);
146 #if defined(USE_ITHREADS)
149 PERL_SET_THX(my_perl);
151 MUTEX_INIT(&PL_dollarzero_mutex);
153 #ifdef PERL_IMPLICIT_CONTEXT
154 MUTEX_INIT(&PL_my_ctx_mutex);
158 PERL_SET_THX(my_perl);
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
171 /* Newx() needs interpreter, so call malloc() instead */
172 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
173 S_init_tls_and_interp(my_perl);
174 Zero(my_perl, 1, PerlInterpreter);
184 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
191 =head1 Embedding Functions
193 =for apidoc perl_alloc
195 Allocates a new Perl interpreter. See L<perlembed>.
203 PerlInterpreter *my_perl;
205 /* Newx() needs interpreter, so call malloc() instead */
206 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
208 S_init_tls_and_interp(my_perl);
209 #ifndef PERL_TRACK_MEMPOOL
210 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
212 Zero(my_perl, 1, PerlInterpreter);
213 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
217 #endif /* PERL_IMPLICIT_SYS */
220 =for apidoc perl_construct
222 Initializes a new Perl interpreter. See L<perlembed>.
228 perl_construct(pTHXx)
234 PL_perl_destruct_level = 1;
236 if (PL_perl_destruct_level > 0)
239 /* Init the real globals (and main thread)? */
241 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
243 PL_linestr = newSV(79);
244 sv_upgrade(PL_linestr,SVt_PVIV);
246 if (!SvREADONLY(&PL_sv_undef)) {
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. */
258 SvREADONLY_on(&PL_sv_no);
259 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
261 sv_setpv(&PL_sv_yes,PL_Yes);
264 SvREADONLY_on(&PL_sv_yes);
265 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
267 SvREADONLY_on(&PL_sv_placeholder);
268 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
271 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
272 #ifdef PERL_USES_PL_PIDSTATUS
273 PL_pidstatus = newHV();
277 PL_rs = newSVpvs("\n");
282 PL_lex_state = LEX_NOTPARSING;
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
304 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
305 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
307 PL_regex_padav = newAV();
308 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
309 PL_regex_pad = AvARRAY(PL_regex_padav);
311 #ifdef USE_REENTRANT_API
312 Perl_reentrant_init(aTHX);
315 /* Note that strtab is a rather special HV. Assumptions are made
316 about not iterating on it, and not adding tie magic to it.
317 It is properly deallocated in perl_destruct() */
320 HvSHAREKEYS_off(PL_strtab); /* mandatory */
321 hv_ksplit(PL_strtab, 512);
323 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
324 _dyld_lookup_and_bind
325 ("__environ", (unsigned long *) &environ_pointer, NULL);
329 # ifdef USE_ENVIRON_ARRAY
330 PL_origenviron = environ;
334 /* Use sysconf(_SC_CLK_TCK) if available, if not
335 * available or if the sysconf() fails, use the HZ.
336 * BeOS has those, but returns the wrong value.
337 * The HZ if not originally defined has been by now
338 * been defined as CLK_TCK, if available. */
339 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
340 PL_clocktick = sysconf(_SC_CLK_TCK);
341 if (PL_clocktick <= 0)
345 PL_stashcache = newHV();
347 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
348 (int)PERL_VERSION, (int)PERL_SUBVERSION);
351 if (!PL_mmap_page_size) {
352 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
354 SETERRNO(0, SS_NORMAL);
356 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
358 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
360 if ((long) PL_mmap_page_size < 0) {
362 SV * const error = ERRSV;
363 (void) SvUPGRADE(error, SVt_PV);
364 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
367 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
371 # ifdef HAS_GETPAGESIZE
372 PL_mmap_page_size = getpagesize();
374 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
375 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
379 if (PL_mmap_page_size <= 0)
380 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
381 (IV) PL_mmap_page_size);
383 #endif /* HAS_MMAP */
385 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
386 PL_timesbase.tms_utime = 0;
387 PL_timesbase.tms_stime = 0;
388 PL_timesbase.tms_cutime = 0;
389 PL_timesbase.tms_cstime = 0;
400 =for apidoc nothreadhook
402 Stub that provides thread hook for perl_destruct when there are
409 Perl_nothreadhook(pTHX)
415 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
417 Perl_dump_sv_child(pTHX_ SV *sv)
420 const int sock = PL_dumper_fd;
421 const int debug_fd = PerlIO_fileno(Perl_debug_log);
422 union control_un control;
425 struct cmsghdr *cmptr;
427 unsigned char buffer[256];
429 if(sock == -1 || debug_fd == -1)
432 PerlIO_flush(Perl_debug_log);
434 /* All these shenanigans are to pass a file descriptor over to our child for
435 it to dump out to. We can't let it hold open the file descriptor when it
436 forks, as the file descriptor it will dump to can turn out to be one end
437 of pipe that some other process will wait on for EOF. (So as it would
438 be open, the wait would be forever. */
440 msg.msg_control = control.control;
441 msg.msg_controllen = sizeof(control.control);
442 /* We're a connected socket so we don't need a destination */
448 cmptr = CMSG_FIRSTHDR(&msg);
449 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
450 cmptr->cmsg_level = SOL_SOCKET;
451 cmptr->cmsg_type = SCM_RIGHTS;
452 *((int *)CMSG_DATA(cmptr)) = 1;
454 vec[0].iov_base = (void*)&sv;
455 vec[0].iov_len = sizeof(sv);
456 got = sendmsg(sock, &msg, 0);
459 perror("Debug leaking scalars parent sendmsg failed");
462 if(got < sizeof(sv)) {
463 perror("Debug leaking scalars parent short sendmsg");
467 /* Return protocol is
469 unsigned char: length of location string (0 for empty)
470 unsigned char*: string (not terminated)
472 vec[0].iov_base = (void*)&returned_errno;
473 vec[0].iov_len = sizeof(returned_errno);
474 vec[1].iov_base = buffer;
477 got = readv(sock, vec, 2);
480 perror("Debug leaking scalars parent read failed");
481 PerlIO_flush(PerlIO_stderr());
484 if(got < sizeof(returned_errno) + 1) {
485 perror("Debug leaking scalars parent short read");
486 PerlIO_flush(PerlIO_stderr());
491 got = read(sock, buffer + 1, *buffer);
493 perror("Debug leaking scalars parent read 2 failed");
494 PerlIO_flush(PerlIO_stderr());
499 perror("Debug leaking scalars parent short read 2");
500 PerlIO_flush(PerlIO_stderr());
505 if (returned_errno || *buffer) {
506 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
507 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
508 returned_errno, strerror(returned_errno));
514 =for apidoc perl_destruct
516 Shuts down a Perl interpreter. See L<perlembed>.
525 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
527 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
533 /* wait for all pseudo-forked children to finish */
534 PERL_WAIT_FOR_CHILDREN;
536 destruct_level = PL_perl_destruct_level;
539 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
541 const int i = atoi(s);
542 if (destruct_level < i)
548 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
554 if (PL_endav && !PL_minus_c)
555 call_list(PL_scopestack_ix, PL_endav);
561 /* Need to flush since END blocks can produce output */
564 if (CALL_FPTR(PL_threadhook)(aTHX)) {
565 /* Threads hook has vetoed further cleanup */
569 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
570 if (destruct_level != 0) {
571 /* Fork here to create a child. Our child's job is to preserve the
572 state of scalars prior to destruction, so that we can instruct it
573 to dump any scalars that we later find have leaked.
574 There's no subtlety in this code - it assumes POSIX, and it doesn't
578 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
579 perror("Debug leaking scalars socketpair failed");
585 perror("Debug leaking scalars fork failed");
589 /* We are the child */
590 const int sock = fd[1];
591 const int debug_fd = PerlIO_fileno(Perl_debug_log);
594 /* Our success message is an integer 0, and a char 0 */
595 static const char success[sizeof(int) + 1];
599 /* We need to close all other file descriptors otherwise we end up
600 with interesting hangs, where the parent closes its end of a
601 pipe, and sits waiting for (another) child to terminate. Only
602 that child never terminates, because it never gets EOF, because
603 we also have the far end of the pipe open. We even need to
604 close the debugging fd, because sometimes it happens to be one
605 end of a pipe, and a process is waiting on the other end for
606 EOF. Normally it would be closed at some point earlier in
607 destruction, but if we happen to cause the pipe to remain open,
608 EOF never occurs, and we get an infinite hang. Hence all the
609 games to pass in a file descriptor if it's actually needed. */
611 f = sysconf(_SC_OPEN_MAX);
613 where = "sysconf failed";
624 union control_un control;
627 struct cmsghdr *cmptr;
631 msg.msg_control = control.control;
632 msg.msg_controllen = sizeof(control.control);
633 /* We're a connected socket so we don't need a source */
637 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
639 vec[0].iov_base = (void*)⌖
640 vec[0].iov_len = sizeof(target);
642 got = recvmsg(sock, &msg, 0);
647 where = "recv failed";
650 if(got < sizeof(target)) {
651 where = "short recv";
655 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
659 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
660 where = "wrong cmsg_len";
663 if(cmptr->cmsg_level != SOL_SOCKET) {
664 where = "wrong cmsg_level";
667 if(cmptr->cmsg_type != SCM_RIGHTS) {
668 where = "wrong cmsg_type";
672 got_fd = *(int*)CMSG_DATA(cmptr);
673 /* For our last little bit of trickery, put the file descriptor
674 back into Perl_debug_log, as if we never actually closed it
676 if(got_fd != debug_fd) {
677 if (dup2(got_fd, debug_fd) == -1) {
684 PerlIO_flush(Perl_debug_log);
686 got = write(sock, &success, sizeof(success));
689 where = "write failed";
692 if(got < sizeof(success)) {
693 where = "short write";
700 int send_errno = errno;
701 unsigned char length = (unsigned char) strlen(where);
702 struct iovec failure[3] = {
703 {(void*)&send_errno, sizeof(send_errno)},
705 {(void*)where, length}
707 int got = writev(sock, failure, 3);
708 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
709 in the parent if we try to read from the socketpair after the
710 child has exited, even if there was data to read.
711 So sleep a bit to give the parent a fighting chance of
714 _exit((got == -1) ? errno : 0);
718 PL_dumper_fd = fd[0];
723 /* We must account for everything. */
725 /* Destroy the main CV and syntax tree */
726 /* Do this now, because destroying ops can cause new SVs to be generated
727 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
728 PL_curcop to point to a valid op from which the filename structure
730 PL_curcop = &PL_compiling;
732 /* ensure comppad/curpad to refer to main's pad */
733 if (CvPADLIST(PL_main_cv)) {
734 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
736 op_free(PL_main_root);
739 PL_main_start = NULL;
740 SvREFCNT_dec(PL_main_cv);
744 /* Tell PerlIO we are about to tear things apart in case
745 we have layers which are using resources that should
749 PerlIO_destruct(aTHX);
751 if (PL_sv_objcount) {
753 * Try to destruct global references. We do this first so that the
754 * destructors and destructees still exist. Some sv's might remain.
755 * Non-referenced objects are on their own.
759 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
760 PL_defoutgv = NULL; /* may have been freed */
763 /* unhook hooks which will soon be, or use, destroyed data */
764 SvREFCNT_dec(PL_warnhook);
766 SvREFCNT_dec(PL_diehook);
769 /* call exit list functions */
770 while (PL_exitlistlen-- > 0)
771 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
773 Safefree(PL_exitlist);
778 if (destruct_level == 0){
780 DEBUG_P(debprofdump());
782 #if defined(PERLIO_LAYERS)
783 /* No more IO - including error messages ! */
784 PerlIO_cleanup(aTHX);
787 /* The exit() function will do everything that needs doing. */
791 /* jettison our possibly duplicated environment */
792 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
793 * so we certainly shouldn't free it here
796 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
797 if (environ != PL_origenviron && !PL_use_safe_putenv
799 /* only main thread can free environ[0] contents */
800 && PL_curinterp == aTHX
806 for (i = 0; environ[i]; i++)
807 safesysfree(environ[i]);
809 /* Must use safesysfree() when working with environ. */
810 safesysfree(environ);
812 environ = PL_origenviron;
815 #endif /* !PERL_MICRO */
817 /* reset so print() ends up where we expect */
821 /* the syntax tree is shared between clones
822 * so op_free(PL_main_root) only ReREFCNT_dec's
823 * REGEXPs in the parent interpreter
824 * we need to manually ReREFCNT_dec for the clones
827 I32 i = AvFILLp(PL_regex_padav) + 1;
828 SV * const * const ary = AvARRAY(PL_regex_padav);
831 SV * const resv = ary[--i];
833 if (SvFLAGS(resv) & SVf_BREAK) {
834 /* this is PL_reg_curpm, already freed
835 * flag is set in regexec.c:S_regtry
837 SvFLAGS(resv) &= ~SVf_BREAK;
839 else if(SvREPADTMP(resv)) {
840 SvREPADTMP_off(resv);
842 else if(SvIOKp(resv)) {
843 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
848 SvREFCNT_dec(PL_regex_padav);
849 PL_regex_padav = NULL;
853 SvREFCNT_dec((SV*) PL_stashcache);
854 PL_stashcache = NULL;
856 /* loosen bonds of global variables */
859 (void)PerlIO_close(PL_rsfp);
863 /* Filters for program text */
864 SvREFCNT_dec(PL_rsfp_filters);
865 PL_rsfp_filters = NULL;
868 PL_preprocess = FALSE;
874 PL_doswitches = FALSE;
875 PL_dowarn = G_WARN_OFF;
876 PL_doextract = FALSE;
877 PL_sawampersand = FALSE; /* must save all match strings */
880 Safefree(PL_inplace);
882 SvREFCNT_dec(PL_patchlevel);
885 SvREFCNT_dec(PL_e_script);
891 /* magical thingies */
893 SvREFCNT_dec(PL_ofs_sv); /* $, */
896 SvREFCNT_dec(PL_ors_sv); /* $\ */
899 SvREFCNT_dec(PL_rs); /* $/ */
902 PL_multiline = 0; /* $* */
903 Safefree(PL_osname); /* $^O */
906 SvREFCNT_dec(PL_statname);
910 /* defgv, aka *_ should be taken care of elsewhere */
912 /* clean up after study() */
913 SvREFCNT_dec(PL_lastscream);
914 PL_lastscream = NULL;
915 Safefree(PL_screamfirst);
917 Safefree(PL_screamnext);
921 Safefree(PL_efloatbuf);
925 /* startup and shutdown function lists */
926 SvREFCNT_dec(PL_beginav);
927 SvREFCNT_dec(PL_beginav_save);
928 SvREFCNT_dec(PL_endav);
929 SvREFCNT_dec(PL_checkav);
930 SvREFCNT_dec(PL_checkav_save);
931 SvREFCNT_dec(PL_initav);
933 PL_beginav_save = NULL;
936 PL_checkav_save = NULL;
939 /* shortcuts just get cleared */
948 PL_last_in_gv = NULL;
956 PL_DBassertion = NULL;
961 SvREFCNT_dec(PL_argvout_stack);
962 PL_argvout_stack = NULL;
964 SvREFCNT_dec(PL_modglobal);
966 SvREFCNT_dec(PL_preambleav);
967 PL_preambleav = NULL;
968 SvREFCNT_dec(PL_subname);
970 SvREFCNT_dec(PL_linestr);
972 #ifdef PERL_USES_PL_PIDSTATUS
973 SvREFCNT_dec(PL_pidstatus);
976 SvREFCNT_dec(PL_toptarget);
978 SvREFCNT_dec(PL_bodytarget);
979 PL_bodytarget = NULL;
980 PL_formtarget = NULL;
982 /* free locale stuff */
983 #ifdef USE_LOCALE_COLLATE
984 Safefree(PL_collation_name);
985 PL_collation_name = NULL;
988 #ifdef USE_LOCALE_NUMERIC
989 Safefree(PL_numeric_name);
990 PL_numeric_name = NULL;
991 SvREFCNT_dec(PL_numeric_radix_sv);
992 PL_numeric_radix_sv = NULL;
995 /* clear utf8 character classes */
996 SvREFCNT_dec(PL_utf8_alnum);
997 SvREFCNT_dec(PL_utf8_alnumc);
998 SvREFCNT_dec(PL_utf8_ascii);
999 SvREFCNT_dec(PL_utf8_alpha);
1000 SvREFCNT_dec(PL_utf8_space);
1001 SvREFCNT_dec(PL_utf8_cntrl);
1002 SvREFCNT_dec(PL_utf8_graph);
1003 SvREFCNT_dec(PL_utf8_digit);
1004 SvREFCNT_dec(PL_utf8_upper);
1005 SvREFCNT_dec(PL_utf8_lower);
1006 SvREFCNT_dec(PL_utf8_print);
1007 SvREFCNT_dec(PL_utf8_punct);
1008 SvREFCNT_dec(PL_utf8_xdigit);
1009 SvREFCNT_dec(PL_utf8_mark);
1010 SvREFCNT_dec(PL_utf8_toupper);
1011 SvREFCNT_dec(PL_utf8_totitle);
1012 SvREFCNT_dec(PL_utf8_tolower);
1013 SvREFCNT_dec(PL_utf8_tofold);
1014 SvREFCNT_dec(PL_utf8_idstart);
1015 SvREFCNT_dec(PL_utf8_idcont);
1016 PL_utf8_alnum = NULL;
1017 PL_utf8_alnumc = NULL;
1018 PL_utf8_ascii = NULL;
1019 PL_utf8_alpha = NULL;
1020 PL_utf8_space = NULL;
1021 PL_utf8_cntrl = NULL;
1022 PL_utf8_graph = NULL;
1023 PL_utf8_digit = NULL;
1024 PL_utf8_upper = NULL;
1025 PL_utf8_lower = NULL;
1026 PL_utf8_print = NULL;
1027 PL_utf8_punct = NULL;
1028 PL_utf8_xdigit = NULL;
1029 PL_utf8_mark = NULL;
1030 PL_utf8_toupper = NULL;
1031 PL_utf8_totitle = NULL;
1032 PL_utf8_tolower = NULL;
1033 PL_utf8_tofold = NULL;
1034 PL_utf8_idstart = NULL;
1035 PL_utf8_idcont = NULL;
1037 if (!specialWARN(PL_compiling.cop_warnings))
1038 SvREFCNT_dec(PL_compiling.cop_warnings);
1039 PL_compiling.cop_warnings = NULL;
1040 if (!specialCopIO(PL_compiling.cop_io))
1041 SvREFCNT_dec(PL_compiling.cop_io);
1042 PL_compiling.cop_io = NULL;
1043 CopFILE_free(&PL_compiling);
1044 CopSTASH_free(&PL_compiling);
1046 /* Prepare to destruct main symbol table. */
1051 SvREFCNT_dec(PL_curstname);
1052 PL_curstname = NULL;
1054 /* clear queued errors */
1055 SvREFCNT_dec(PL_errors);
1059 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1060 if (PL_scopestack_ix != 0)
1061 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1063 (long)PL_scopestack_ix);
1064 if (PL_savestack_ix != 0)
1065 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1066 "Unbalanced saves: %ld more saves than restores\n",
1067 (long)PL_savestack_ix);
1068 if (PL_tmps_floor != -1)
1069 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1070 (long)PL_tmps_floor + 1);
1071 if (cxstack_ix != -1)
1072 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1073 (long)cxstack_ix + 1);
1076 /* Now absolutely destruct everything, somehow or other, loops or no. */
1077 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1078 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1080 /* the 2 is for PL_fdpid and PL_strtab */
1081 while (PL_sv_count > 2 && sv_clean_all())
1084 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1085 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1086 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1087 SvFLAGS(PL_strtab) |= SVt_PVHV;
1089 AvREAL_off(PL_fdpid); /* no surviving entries */
1090 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1093 #ifdef HAVE_INTERP_INTERN
1097 /* Destruct the global string table. */
1099 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1100 * so that sv_free() won't fail on them.
1101 * Now that the global string table is using a single hunk of memory
1102 * for both HE and HEK, we either need to explicitly unshare it the
1103 * correct way, or actually free things here.
1106 const I32 max = HvMAX(PL_strtab);
1107 HE * const * const array = HvARRAY(PL_strtab);
1108 HE *hent = array[0];
1111 if (hent && ckWARN_d(WARN_INTERNAL)) {
1112 HE * const next = HeNEXT(hent);
1113 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1114 "Unbalanced string table refcount: (%ld) for \"%s\"",
1115 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1122 hent = array[riter];
1127 HvARRAY(PL_strtab) = 0;
1128 HvTOTALKEYS(PL_strtab) = 0;
1129 HvFILL(PL_strtab) = 0;
1131 SvREFCNT_dec(PL_strtab);
1134 /* free the pointer tables used for cloning */
1135 ptr_table_free(PL_ptr_table);
1136 PL_ptr_table = (PTR_TBL_t*)NULL;
1139 /* free special SVs */
1141 SvREFCNT(&PL_sv_yes) = 0;
1142 sv_clear(&PL_sv_yes);
1143 SvANY(&PL_sv_yes) = NULL;
1144 SvFLAGS(&PL_sv_yes) = 0;
1146 SvREFCNT(&PL_sv_no) = 0;
1147 sv_clear(&PL_sv_no);
1148 SvANY(&PL_sv_no) = NULL;
1149 SvFLAGS(&PL_sv_no) = 0;
1153 for (i=0; i<=2; i++) {
1154 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1155 sv_clear(PERL_DEBUG_PAD(i));
1156 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1157 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1161 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1162 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1164 #ifdef DEBUG_LEAKING_SCALARS
1165 if (PL_sv_count != 0) {
1170 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1171 svend = &sva[SvREFCNT(sva)];
1172 for (sv = sva + 1; sv < svend; ++sv) {
1173 if (SvTYPE(sv) != SVTYPEMASK) {
1174 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1176 " refcnt=%"UVuf pTHX__FORMAT "\n"
1177 "\tallocated at %s:%d %s %s%s\n",
1178 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1179 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1181 sv->sv_debug_inpad ? "for" : "by",
1182 sv->sv_debug_optype ?
1183 PL_op_name[sv->sv_debug_optype]: "(none)",
1184 sv->sv_debug_cloned ? " (cloned)" : ""
1186 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1187 Perl_dump_sv_child(aTHX_ sv);
1193 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1197 /* Wait for up to 4 seconds for child to terminate.
1198 This seems to be the least effort way of timing out on reaping
1200 struct timeval waitfor = {4, 0};
1201 int sock = PL_dumper_fd;
1205 FD_SET(sock, &rset);
1206 select(sock + 1, &rset, NULL, NULL, &waitfor);
1207 waitpid(child, &status, WNOHANG);
1215 #if defined(PERLIO_LAYERS)
1216 /* No more IO - including error messages ! */
1217 PerlIO_cleanup(aTHX);
1220 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1221 as currently layers use it rather than NULL as a marker
1222 for no arg - and will try and SvREFCNT_dec it.
1224 SvREFCNT(&PL_sv_undef) = 0;
1225 SvREADONLY_off(&PL_sv_undef);
1227 Safefree(PL_origfilename);
1228 PL_origfilename = NULL;
1229 Safefree(PL_reg_start_tmp);
1230 PL_reg_start_tmp = (char**)NULL;
1231 PL_reg_start_tmpl = 0;
1232 Safefree(PL_reg_curpm);
1233 Safefree(PL_reg_poscache);
1234 free_tied_hv_pool();
1235 Safefree(PL_op_mask);
1236 Safefree(PL_psig_ptr);
1237 PL_psig_ptr = (SV**)NULL;
1238 Safefree(PL_psig_name);
1239 PL_psig_name = (SV**)NULL;
1240 Safefree(PL_bitcount);
1242 Safefree(PL_psig_pend);
1243 PL_psig_pend = (int*)NULL;
1246 PL_tainting = FALSE;
1247 PL_taint_warn = FALSE;
1248 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1251 DEBUG_P(debprofdump());
1253 #ifdef USE_REENTRANT_API
1254 Perl_reentrant_free(aTHX);
1259 /* As the absolutely last thing, free the non-arena SV for mess() */
1262 /* we know that type == SVt_PVMG */
1264 /* it could have accumulated taint magic */
1267 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1268 moremagic = mg->mg_moremagic;
1269 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1271 Safefree(mg->mg_ptr);
1275 /* we know that type >= SVt_PV */
1276 SvPV_free(PL_mess_sv);
1277 Safefree(SvANY(PL_mess_sv));
1278 Safefree(PL_mess_sv);
1285 =for apidoc perl_free
1287 Releases a Perl interpreter. See L<perlembed>.
1295 #ifdef PERL_TRACK_MEMPOOL
1298 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1299 * value as we're probably hunting memory leaks then
1301 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1302 if (!s || atoi(s) == 0) {
1303 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1304 thread at thread exit. */
1305 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1306 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1311 #if defined(WIN32) || defined(NETWARE)
1312 # if defined(PERL_IMPLICIT_SYS)
1315 void *host = nw_internal_host;
1317 void *host = w32_internal_host;
1319 PerlMem_free(aTHXx);
1321 nw_delete_internal_host(host);
1323 win32_delete_internal_host(host);
1327 PerlMem_free(aTHXx);
1330 PerlMem_free(aTHXx);
1334 #if defined(USE_ITHREADS)
1335 /* provide destructors to clean up the thread key when libperl is unloaded */
1336 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1338 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1339 #pragma fini "perl_fini"
1343 #if defined(__GNUC__)
1344 __attribute__((destructor))
1354 #endif /* THREADS */
1357 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1360 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1361 PL_exitlist[PL_exitlistlen].fn = fn;
1362 PL_exitlist[PL_exitlistlen].ptr = ptr;
1366 #ifdef HAS_PROCSELFEXE
1367 /* This is a function so that we don't hold on to MAXPATHLEN
1368 bytes of stack longer than necessary
1371 S_procself_val(pTHX_ SV *sv, const char *arg0)
1373 char buf[MAXPATHLEN];
1374 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1376 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1377 includes a spurious NUL which will cause $^X to fail in system
1378 or backticks (this will prevent extensions from being built and
1379 many tests from working). readlink is not meant to add a NUL.
1380 Normal readlink works fine.
1382 if (len > 0 && buf[len-1] == '\0') {
1386 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1387 returning the text "unknown" from the readlink rather than the path
1388 to the executable (or returning an error from the readlink). Any valid
1389 path has a '/' in it somewhere, so use that to validate the result.
1390 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1392 if (len > 0 && memchr(buf, '/', len)) {
1393 sv_setpvn(sv,buf,len);
1399 #endif /* HAS_PROCSELFEXE */
1402 S_set_caret_X(pTHX) {
1404 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1406 #ifdef HAS_PROCSELFEXE
1407 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1410 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1412 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1419 =for apidoc perl_parse
1421 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1427 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1434 PERL_UNUSED_VAR(my_perl);
1436 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1439 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1440 setuid perl scripts securely.\n");
1441 #endif /* IAMSUID */
1444 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1445 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1446 * This MUST be done before any hash stores or fetches take place.
1447 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1448 * yourself, it is your responsibility to provide a good random seed!
1449 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1450 if (!PL_rehash_seed_set)
1451 PL_rehash_seed = get_hash_seed();
1453 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1455 if (s && (atoi(s) == 1))
1456 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1458 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1463 if (PL_origalen != 0) {
1464 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1467 /* Set PL_origalen be the sum of the contiguous argv[]
1468 * elements plus the size of the env in case that it is
1469 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1470 * as the maximum modifiable length of $0. In the worst case
1471 * the area we are able to modify is limited to the size of
1472 * the original argv[0]. (See below for 'contiguous', though.)
1474 const char *s = NULL;
1477 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1478 /* Do the mask check only if the args seem like aligned. */
1480 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1482 /* See if all the arguments are contiguous in memory. Note
1483 * that 'contiguous' is a loose term because some platforms
1484 * align the argv[] and the envp[]. If the arguments look
1485 * like non-aligned, assume that they are 'strictly' or
1486 * 'traditionally' contiguous. If the arguments look like
1487 * aligned, we just check that they are within aligned
1488 * PTRSIZE bytes. As long as no system has something bizarre
1489 * like the argv[] interleaved with some other data, we are
1490 * fine. (Did I just evoke Murphy's Law?) --jhi */
1491 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1493 for (i = 1; i < PL_origargc; i++) {
1494 if ((PL_origargv[i] == s + 1
1496 || PL_origargv[i] == s + 2
1501 (PL_origargv[i] > s &&
1503 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1513 /* Can we grab env area too to be used as the area for $0? */
1514 if (s && PL_origenviron) {
1515 if ((PL_origenviron[0] == s + 1
1517 || (PL_origenviron[0] == s + 9 && (s += 8))
1522 (PL_origenviron[0] > s &&
1523 PL_origenviron[0] <=
1524 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 s = PL_origenviron[0];
1531 my_setenv("NoNe SuCh", NULL);
1532 /* Force copy of environment. */
1533 for (i = 1; PL_origenviron[i]; i++) {
1534 if (PL_origenviron[i] == s + 1
1537 (PL_origenviron[i] > s &&
1538 PL_origenviron[i] <=
1539 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1542 s = PL_origenviron[i];
1550 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1555 /* Come here if running an undumped a.out. */
1557 PL_origfilename = savepv(argv[0]);
1558 PL_do_undump = FALSE;
1559 cxstack_ix = -1; /* start label stack again */
1561 assert (!PL_tainted);
1563 S_set_caret_X(aTHX);
1565 init_postdump_symbols(argc,argv,env);
1570 op_free(PL_main_root);
1571 PL_main_root = NULL;
1573 PL_main_start = NULL;
1574 SvREFCNT_dec(PL_main_cv);
1578 oldscope = PL_scopestack_ix;
1579 PL_dowarn = G_WARN_OFF;
1584 parse_body(env,xsinit);
1586 call_list(oldscope, PL_checkav);
1593 /* my_exit() was called */
1594 while (PL_scopestack_ix > oldscope)
1597 PL_curstash = PL_defstash;
1599 call_list(oldscope, PL_checkav);
1603 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1612 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1615 int argc = PL_origargc;
1616 char **argv = PL_origargv;
1617 const char *scriptname = NULL;
1618 VOL bool dosearch = FALSE;
1619 const char *validarg = "";
1622 const char *cddir = NULL;
1623 #ifdef USE_SITECUSTOMIZE
1624 bool minus_f = FALSE;
1627 sv_setpvn(PL_linestr,"",0);
1628 sv = newSVpvs(""); /* first used for -I flags */
1632 for (argc--,argv++; argc > 0; argc--,argv++) {
1633 if (argv[0][0] != '-' || !argv[0][1])
1637 validarg = " PHOOEY ";
1641 * Can we rely on the kernel to start scripts with argv[1] set to
1642 * contain all #! line switches (the whole line)? (argv[0] is set to
1643 * the interpreter name, argv[2] to the script name; argv[3] and
1644 * above may contain other arguments.)
1651 #ifndef PERL_STRICT_CR
1676 if ((s = moreswitches(s)))
1681 CHECK_MALLOC_TOO_LATE_FOR('t');
1682 if( !PL_tainting ) {
1683 PL_taint_warn = TRUE;
1689 CHECK_MALLOC_TOO_LATE_FOR('T');
1691 PL_taint_warn = FALSE;
1699 #ifdef MACOS_TRADITIONAL
1700 /* ignore -e for Dev:Pseudo argument */
1701 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1704 forbid_setid('e', -1);
1706 PL_e_script = newSVpvs("");
1707 filter_add(read_e_script, NULL);
1710 sv_catpv(PL_e_script, s);
1712 sv_catpv(PL_e_script, argv[1]);
1716 Perl_croak(aTHX_ "No code specified for -%c", *s);
1717 sv_catpvs(PL_e_script, "\n");
1721 #ifdef USE_SITECUSTOMIZE
1727 case 'I': /* -I handled both here and in moreswitches() */
1728 forbid_setid('I', -1);
1729 if (!*++s && (s=argv[1]) != NULL) {
1733 STRLEN len = strlen(s);
1734 const char * const p = savepvn(s, len);
1735 incpush(p, TRUE, TRUE, FALSE, FALSE);
1736 sv_catpvs(sv, "-I");
1737 sv_catpvn(sv, p, len);
1742 Perl_croak(aTHX_ "No directory specified for -I");
1745 forbid_setid('P', -1);
1746 PL_preprocess = TRUE;
1750 forbid_setid('S', -1);
1759 PL_preambleav = newAV();
1760 av_push(PL_preambleav,
1761 newSVpvs("use Config;"));
1765 opts_prog = newSVpvs("print Config::myconfig(),");
1767 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1769 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1771 opts = SvCUR(opts_prog);
1773 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1777 # ifdef DEBUG_LEAKING_SCALARS
1778 " DEBUG_LEAKING_SCALARS"
1780 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1781 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1783 # ifdef FAKE_THREADS
1786 # ifdef MULTIPLICITY
1795 # ifdef PERL_DONT_CREATE_GVSV
1796 " PERL_DONT_CREATE_GVSV"
1798 # ifdef PERL_GLOBAL_STRUCT
1799 " PERL_GLOBAL_STRUCT"
1801 # ifdef PERL_IMPLICIT_CONTEXT
1802 " PERL_IMPLICIT_CONTEXT"
1804 # ifdef PERL_IMPLICIT_SYS
1805 " PERL_IMPLICIT_SYS"
1810 # ifdef PERL_MALLOC_WRAP
1813 # ifdef PERL_NEED_APPCTX
1816 # ifdef PERL_NEED_TIMESBASE
1817 " PERL_NEED_TIMESBASE"
1819 # ifdef PERL_OLD_COPY_ON_WRITE
1820 " PERL_OLD_COPY_ON_WRITE"
1822 # ifdef PERL_TRACK_MEMPOOL
1823 " PERL_TRACK_MEMPOOL"
1825 # ifdef PERL_USE_SAFE_PUTENV
1826 " PERL_USE_SAFE_PUTENV"
1828 #ifdef PERL_USES_PL_PIDSTATUS
1829 " PERL_USES_PL_PIDSTATUS"
1831 # ifdef PL_OP_SLAB_ALLOC
1834 # ifdef THREADS_HAVE_PIDS
1835 " THREADS_HAVE_PIDS"
1837 # ifdef USE_64_BIT_ALL
1840 # ifdef USE_64_BIT_INT
1843 # ifdef USE_ITHREADS
1846 # ifdef USE_LARGE_FILES
1849 # ifdef USE_LONG_DOUBLE
1855 # ifdef USE_REENTRANT_API
1856 " USE_REENTRANT_API"
1861 # ifdef USE_SITECUSTOMIZE
1862 " USE_SITECUSTOMIZE"
1869 while (SvCUR(opts_prog) > opts+76) {
1870 /* find last space after "options: " and before col 76
1874 char * const pv = SvPV_nolen(opts_prog);
1875 const char c = pv[opts+76];
1877 space = strrchr(pv+opts+26, ' ');
1879 if (!space) break; /* "Can't happen" */
1881 /* break the line before that space */
1884 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1885 STR_WITH_LEN("\\n "));
1888 sv_catpvs(opts_prog,"\\n\",");
1890 #if defined(LOCAL_PATCH_COUNT)
1891 if (LOCAL_PATCH_COUNT > 0) {
1893 sv_catpvs(opts_prog,
1894 "\" Locally applied patches:\\n\",");
1895 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1896 if (PL_localpatches[i])
1897 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1898 0, PL_localpatches[i], 0);
1902 Perl_sv_catpvf(aTHX_ opts_prog,
1903 "\" Built under %s\\n\"",OSNAME);
1906 Perl_sv_catpvf(aTHX_ opts_prog,
1907 ",\" Compiled at %s %s\\n\"",__DATE__,
1910 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1914 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1915 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1916 "sort grep {/^PERL/} keys %ENV; ");
1918 sv_catpvs(opts_prog,
1919 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1921 sv_catpvs(opts_prog,
1922 "print \" \\%ENV:\\n @env\\n\" if @env;"
1923 "print \" \\@INC:\\n @INC\\n\";");
1927 opts_prog = Perl_newSVpvf(aTHX_
1928 "Config::config_vars(qw%c%s%c)",
1932 av_push(PL_preambleav, opts_prog);
1933 /* don't look for script or read stdin */
1934 scriptname = BIT_BUCKET;
1938 PL_doextract = TRUE;
1946 if (!*++s || isSPACE(*s)) {
1950 /* catch use of gnu style long options */
1951 if (strEQ(s, "version")) {
1955 if (strEQ(s, "help")) {
1962 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1968 #ifndef SECURE_INTERNAL_GETENV
1971 (s = PerlEnv_getenv("PERL5OPT")))
1973 const char *popt = s;
1976 if (*s == '-' && *(s+1) == 'T') {
1977 CHECK_MALLOC_TOO_LATE_FOR('T');
1979 PL_taint_warn = FALSE;
1982 char *popt_copy = NULL;
1995 if (!strchr("CDIMUdmtwA", *s))
1996 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2000 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2001 s = popt_copy + (s - popt);
2002 d = popt_copy + (d - popt);
2009 if( !PL_tainting ) {
2010 PL_taint_warn = TRUE;
2020 #ifdef USE_SITECUSTOMIZE
2023 PL_preambleav = newAV();
2024 av_unshift(PL_preambleav, 1);
2025 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2029 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2030 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2034 scriptname = argv[0];
2037 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2039 else if (scriptname == NULL) {
2041 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2047 /* Set $^X early so that it can be used for relocatable paths in @INC */
2048 assert (!PL_tainted);
2050 S_set_caret_X(aTHX);
2057 = open_script(scriptname, dosearch, sv, &suidscript);
2059 validate_suid(validarg, scriptname, fdscript, suidscript);
2062 # if defined(SIGCHLD) || defined(SIGCLD)
2065 # define SIGCHLD SIGCLD
2067 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2068 if (sigstate == (Sighandler_t) SIG_IGN) {
2069 if (ckWARN(WARN_SIGNAL))
2070 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2071 "Can't ignore signal CHLD, forcing to default");
2072 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2079 #ifdef MACOS_TRADITIONAL
2080 || gMacPerl_AlwaysExtract
2084 /* This will croak if suidscript is >= 0, as -x cannot be used with
2086 forbid_setid('x', suidscript);
2087 /* Hence you can't get here if suidscript >= 0 */
2090 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2091 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2095 PL_main_cv = PL_compcv = (CV*)newSV(0);
2096 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2097 CvUNIQUE_on(PL_compcv);
2099 CvPADLIST(PL_compcv) = pad_new(0);
2102 boot_core_UNIVERSAL();
2103 boot_core_xsutils();
2106 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2108 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2114 # ifdef HAS_SOCKS5_INIT
2115 socks5_init(argv[0]);
2121 init_predump_symbols();
2122 /* init_postdump_symbols not currently designed to be called */
2123 /* more than once (ENV isn't cleared first, for example) */
2124 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2126 init_postdump_symbols(argc,argv,env);
2128 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2129 * or explicitly in some platforms.
2130 * locale.c:Perl_init_i18nl10n() if the environment
2131 * look like the user wants to use UTF-8. */
2132 #if defined(__SYMBIAN32__)
2133 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2136 /* Requires init_predump_symbols(). */
2137 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2142 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2143 * and the default open disciplines. */
2144 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2145 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2147 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2148 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2149 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2151 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2152 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2153 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2155 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2156 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2157 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2159 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2160 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2163 sv_setpvn(sv, ":utf8\0:utf8", 11);
2165 sv_setpvn(sv, ":utf8\0", 6);
2168 sv_setpvn(sv, "\0:utf8", 6);
2174 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2175 if (strEQ(s, "unsafe"))
2176 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2177 else if (strEQ(s, "safe"))
2178 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2180 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2184 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2188 PL_xmlfp = PerlIO_stdout();
2190 PL_xmlfp = PerlIO_open(s, "w");
2192 Perl_croak(aTHX_ "Can't open %s", s);
2194 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2196 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2197 PL_madskills = atoi(s);
2198 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2204 /* now parse the script */
2206 SETERRNO(0,SS_NORMAL);
2208 #ifdef MACOS_TRADITIONAL
2209 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2211 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2213 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2214 MacPerl_MPWFileName(PL_origfilename));
2218 if (yyparse() || PL_error_count) {
2220 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2222 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2227 CopLINE_set(PL_curcop, 0);
2228 PL_curstash = PL_defstash;
2229 PL_preprocess = FALSE;
2231 SvREFCNT_dec(PL_e_script);
2239 SAVECOPFILE(PL_curcop);
2240 SAVECOPLINE(PL_curcop);
2241 gv_check(PL_defstash);
2248 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2249 dump_mstats("after compilation:");
2258 =for apidoc perl_run
2260 Tells a Perl interpreter to run. See L<perlembed>.
2273 PERL_UNUSED_CONTEXT;
2275 oldscope = PL_scopestack_ix;
2283 cxstack_ix = -1; /* start context stack again */
2285 case 0: /* normal completion */
2289 case 2: /* my_exit() */
2290 while (PL_scopestack_ix > oldscope)
2293 PL_curstash = PL_defstash;
2294 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2295 PL_endav && !PL_minus_c)
2296 call_list(oldscope, PL_endav);
2298 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2299 dump_mstats("after execution: ");
2305 POPSTACK_TO(PL_mainstack);
2308 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2320 S_run_body(pTHX_ I32 oldscope)
2323 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2324 PL_sawampersand ? "Enabling" : "Omitting"));
2326 if (!PL_restartop) {
2330 exit(0); /* less likely to core dump than my_exit(0) */
2333 DEBUG_x(dump_all());
2336 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2338 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2342 #ifdef MACOS_TRADITIONAL
2343 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2344 (gMacPerl_ErrorFormat ? "# " : ""),
2345 MacPerl_MPWFileName(PL_origfilename));
2347 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2351 if (PERLDB_SINGLE && PL_DBsingle)
2352 sv_setiv(PL_DBsingle, 1);
2354 call_list(oldscope, PL_initav);
2360 PL_op = PL_restartop;
2364 else if (PL_main_start) {
2365 CvDEPTH(PL_main_cv) = 1;
2366 PL_op = PL_main_start;
2374 =head1 SV Manipulation Functions
2376 =for apidoc p||get_sv
2378 Returns the SV of the specified Perl scalar. If C<create> is set and the
2379 Perl variable does not exist then it will be created. If C<create> is not
2380 set and the variable does not exist then NULL is returned.
2386 Perl_get_sv(pTHX_ const char *name, I32 create)
2389 gv = gv_fetchpv(name, create, SVt_PV);
2396 =head1 Array Manipulation Functions
2398 =for apidoc p||get_av
2400 Returns the AV of the specified Perl array. If C<create> is set and the
2401 Perl variable does not exist then it will be created. If C<create> is not
2402 set and the variable does not exist then NULL is returned.
2408 Perl_get_av(pTHX_ const char *name, I32 create)
2410 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2419 =head1 Hash Manipulation Functions
2421 =for apidoc p||get_hv
2423 Returns the HV of the specified Perl hash. If C<create> is set and the
2424 Perl variable does not exist then it will be created. If C<create> is not
2425 set and the variable does not exist then NULL is returned.
2431 Perl_get_hv(pTHX_ const char *name, I32 create)
2433 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2442 =head1 CV Manipulation Functions
2444 =for apidoc p||get_cv
2446 Returns the CV of the specified Perl subroutine. If C<create> is set and
2447 the Perl subroutine does not exist then it will be declared (which has the
2448 same effect as saying C<sub name;>). If C<create> is not set and the
2449 subroutine does not exist then NULL is returned.
2455 Perl_get_cv(pTHX_ const char *name, I32 create)
2457 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2458 /* XXX unsafe for threads if eval_owner isn't held */
2459 /* XXX this is probably not what they think they're getting.
2460 * It has the same effect as "sub name;", i.e. just a forward
2462 if (create && !GvCVu(gv))
2463 return newSUB(start_subparse(FALSE, 0),
2464 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2471 /* Be sure to refetch the stack pointer after calling these routines. */
2475 =head1 Callback Functions
2477 =for apidoc p||call_argv
2479 Performs a callback to the specified Perl sub. See L<perlcall>.
2485 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2487 /* See G_* flags in cop.h */
2488 /* null terminated arg list */
2496 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2501 return call_pv(sub_name, flags);
2505 =for apidoc p||call_pv
2507 Performs a callback to the specified Perl sub. See L<perlcall>.
2513 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2514 /* name of the subroutine */
2515 /* See G_* flags in cop.h */
2517 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2521 =for apidoc p||call_method
2523 Performs a callback to the specified Perl method. The blessed object must
2524 be on the stack. See L<perlcall>.
2530 Perl_call_method(pTHX_ const char *methname, I32 flags)
2531 /* name of the subroutine */
2532 /* See G_* flags in cop.h */
2534 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2537 /* May be called with any of a CV, a GV, or an SV containing the name. */
2539 =for apidoc p||call_sv
2541 Performs a callback to the Perl sub whose name is in the SV. See
2548 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2549 /* See G_* flags in cop.h */
2552 LOGOP myop; /* fake syntax tree node */
2555 volatile I32 retval = 0;
2557 bool oldcatch = CATCH_GET;
2559 OP* const oldop = PL_op;
2562 if (flags & G_DISCARD) {
2567 Zero(&myop, 1, LOGOP);
2568 myop.op_next = NULL;
2569 if (!(flags & G_NOARGS))
2570 myop.op_flags |= OPf_STACKED;
2571 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2572 (flags & G_ARRAY) ? OPf_WANT_LIST :
2577 EXTEND(PL_stack_sp, 1);
2578 *++PL_stack_sp = sv;
2580 oldscope = PL_scopestack_ix;
2582 if (PERLDB_SUB && PL_curstash != PL_debstash
2583 /* Handle first BEGIN of -d. */
2584 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2585 /* Try harder, since this may have been a sighandler, thus
2586 * curstash may be meaningless. */
2587 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2588 && !(flags & G_NODEBUG))
2589 PL_op->op_private |= OPpENTERSUB_DB;
2591 if (flags & G_METHOD) {
2592 Zero(&method_op, 1, UNOP);
2593 method_op.op_next = PL_op;
2594 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2595 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2596 PL_op = (OP*)&method_op;
2599 if (!(flags & G_EVAL)) {
2601 call_body((OP*)&myop, FALSE);
2602 retval = PL_stack_sp - (PL_stack_base + oldmark);
2603 CATCH_SET(oldcatch);
2606 myop.op_other = (OP*)&myop;
2608 /* we're trying to emulate pp_entertry() here */
2610 register PERL_CONTEXT *cx;
2611 const I32 gimme = GIMME_V;
2616 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2618 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2620 PL_in_eval = EVAL_INEVAL;
2621 if (flags & G_KEEPERR)
2622 PL_in_eval |= EVAL_KEEPERR;
2624 sv_setpvn(ERRSV,"",0);
2632 call_body((OP*)&myop, FALSE);
2633 retval = PL_stack_sp - (PL_stack_base + oldmark);
2634 if (!(flags & G_KEEPERR))
2635 sv_setpvn(ERRSV,"",0);
2641 /* my_exit() was called */
2642 PL_curstash = PL_defstash;
2645 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2646 Perl_croak(aTHX_ "Callback called exit");
2651 PL_op = PL_restartop;
2655 PL_stack_sp = PL_stack_base + oldmark;
2656 if (flags & G_ARRAY)
2660 *++PL_stack_sp = &PL_sv_undef;
2665 if (PL_scopestack_ix > oldscope) {
2669 register PERL_CONTEXT *cx;
2676 PERL_UNUSED_VAR(newsp);
2677 PERL_UNUSED_VAR(gimme);
2678 PERL_UNUSED_VAR(optype);
2683 if (flags & G_DISCARD) {
2684 PL_stack_sp = PL_stack_base + oldmark;
2694 S_call_body(pTHX_ const OP *myop, bool is_eval)
2697 if (PL_op == myop) {
2699 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2701 PL_op = Perl_pp_entersub(aTHX); /* this does */
2707 /* Eval a string. The G_EVAL flag is always assumed. */
2710 =for apidoc p||eval_sv
2712 Tells Perl to C<eval> the string in the SV.
2718 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2720 /* See G_* flags in cop.h */
2724 UNOP myop; /* fake syntax tree node */
2725 volatile I32 oldmark = SP - PL_stack_base;
2726 volatile I32 retval = 0;
2728 OP* const oldop = PL_op;
2731 if (flags & G_DISCARD) {
2738 Zero(PL_op, 1, UNOP);
2739 EXTEND(PL_stack_sp, 1);
2740 *++PL_stack_sp = sv;
2742 if (!(flags & G_NOARGS))
2743 myop.op_flags = OPf_STACKED;
2744 myop.op_next = NULL;
2745 myop.op_type = OP_ENTEREVAL;
2746 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2747 (flags & G_ARRAY) ? OPf_WANT_LIST :
2749 if (flags & G_KEEPERR)
2750 myop.op_flags |= OPf_SPECIAL;
2752 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2753 * before a PUSHEVAL, which corrupts the stack after a croak */
2754 TAINT_PROPER("eval_sv()");
2760 call_body((OP*)&myop,TRUE);
2761 retval = PL_stack_sp - (PL_stack_base + oldmark);
2762 if (!(flags & G_KEEPERR))
2763 sv_setpvn(ERRSV,"",0);
2769 /* my_exit() was called */
2770 PL_curstash = PL_defstash;
2773 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2774 Perl_croak(aTHX_ "Callback called exit");
2779 PL_op = PL_restartop;
2783 PL_stack_sp = PL_stack_base + oldmark;
2784 if (flags & G_ARRAY)
2788 *++PL_stack_sp = &PL_sv_undef;
2794 if (flags & G_DISCARD) {
2795 PL_stack_sp = PL_stack_base + oldmark;
2805 =for apidoc p||eval_pv
2807 Tells Perl to C<eval> the given string and return an SV* result.
2813 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2817 SV* sv = newSVpv(p, 0);
2819 eval_sv(sv, G_SCALAR);
2826 if (croak_on_error && SvTRUE(ERRSV)) {
2827 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2833 /* Require a module. */
2836 =head1 Embedding Functions
2838 =for apidoc p||require_pv
2840 Tells Perl to C<require> the file named by the string argument. It is
2841 analogous to the Perl code C<eval "require '$file'">. It's even
2842 implemented that way; consider using load_module instead.
2847 Perl_require_pv(pTHX_ const char *pv)
2852 PUSHSTACKi(PERLSI_REQUIRE);
2854 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2855 eval_sv(sv_2mortal(sv), G_DISCARD);
2861 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2863 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2866 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2870 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2872 /* This message really ought to be max 23 lines.
2873 * Removed -h because the user already knows that option. Others? */
2875 static const char * const usage_msg[] = {
2876 "-0[octal] specify record separator (\\0, if no argument)",
2877 "-A[mod][=pattern] activate all/given assertions",
2878 "-a autosplit mode with -n or -p (splits $_ into @F)",
2879 "-C[number/list] enables the listed Unicode features",
2880 "-c check syntax only (runs BEGIN and CHECK blocks)",
2881 "-d[:debugger] run program under debugger",
2882 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2883 "-e program one line of program (several -e's allowed, omit programfile)",
2884 "-E program like -e, but enables all optional features",
2885 "-f don't do $sitelib/sitecustomize.pl at startup",
2886 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2887 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2888 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2889 "-l[octal] enable line ending processing, specifies line terminator",
2890 "-[mM][-]module execute \"use/no module...\" before executing program",
2891 "-n assume \"while (<>) { ... }\" loop around program",
2892 "-p assume loop like -n but print line also, like sed",
2893 "-P run program through C preprocessor before compilation",
2894 "-s enable rudimentary parsing for switches after programfile",
2895 "-S look for programfile using PATH environment variable",
2896 "-t enable tainting warnings",
2897 "-T enable tainting checks",
2898 "-u dump core after parsing program",
2899 "-U allow unsafe operations",
2900 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2901 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2902 "-w enable many useful warnings (RECOMMENDED)",
2903 "-W enable all warnings",
2904 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2905 "-X disable all warnings",
2909 const char * const *p = usage_msg;
2911 PerlIO_printf(PerlIO_stdout(),
2912 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2915 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2918 /* convert a string of -D options (or digits) into an int.
2919 * sets *s to point to the char after the options */
2923 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2925 static const char * const usage_msgd[] = {
2926 " Debugging flag values: (see also -d)",
2927 " p Tokenizing and parsing (with v, displays parse stack)",
2928 " s Stack snapshots (with v, displays all stacks)",
2929 " l Context (loop) stack processing",
2930 " t Trace execution",
2931 " o Method and overloading resolution",
2932 " c String/numeric conversions",
2933 " P Print profiling info, preprocessor command for -P, source file input state",
2934 " m Memory allocation",
2935 " f Format processing",
2936 " r Regular expression parsing and execution",
2937 " x Syntax tree dump",
2938 " u Tainting checks",
2939 " H Hash dump -- usurps values()",
2940 " X Scratchpad allocation",
2942 " S Thread synchronization",
2944 " R Include reference counts of dumped variables (eg when using -Ds)",
2945 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2946 " v Verbose: use in conjunction with other flags",
2948 " A Consistency checks on internal structures",
2949 " q quiet - currently only suppresses the 'EXECUTING' message",
2954 /* if adding extra options, remember to update DEBUG_MASK */
2955 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2957 for (; isALNUM(**s); (*s)++) {
2958 const char * const d = strchr(debopts,**s);
2960 i |= 1 << (d - debopts);
2961 else if (ckWARN_d(WARN_DEBUGGING))
2962 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2963 "invalid option -D%c, use -D'' to see choices\n", **s);
2966 else if (isDIGIT(**s)) {
2968 for (; isALNUM(**s); (*s)++) ;
2970 else if (givehelp) {
2971 const char *const *p = usage_msgd;
2972 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2975 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2976 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2977 "-Dp not implemented on this platform\n");
2983 /* This routine handles any switches that can be given during run */
2986 Perl_moreswitches(pTHX_ char *s)
2997 SvREFCNT_dec(PL_rs);
2998 if (s[1] == 'x' && s[2]) {
2999 const char *e = s+=2;
3005 flags = PERL_SCAN_SILENT_ILLDIGIT;
3006 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3007 if (s + numlen < e) {
3008 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3012 PL_rs = newSVpvs("");
3013 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3014 tmps = (U8*)SvPVX(PL_rs);
3015 uvchr_to_utf8(tmps, rschar);
3016 SvCUR_set(PL_rs, UNISKIP(rschar));
3021 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3022 if (rschar & ~((U8)~0))
3023 PL_rs = &PL_sv_undef;
3024 else if (!rschar && numlen >= 2)
3025 PL_rs = newSVpvs("");
3027 char ch = (char)rschar;
3028 PL_rs = newSVpvn(&ch, 1);
3031 sv_setsv(get_sv("/", TRUE), PL_rs);
3036 PL_unicode = parse_unicode_opts( (const char **)&s );
3041 while (*s && !isSPACE(*s)) ++s;
3042 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3053 forbid_setid('d', -1);
3056 /* -dt indicates to the debugger that threads will be used */
3057 if (*s == 't' && !isALNUM(s[1])) {
3059 my_setenv("PERL5DB_THREADED", "1");
3062 /* The following permits -d:Mod to accepts arguments following an =
3063 in the fashion that -MSome::Mod does. */
3064 if (*s == ':' || *s == '=') {
3066 SV * const sv = newSVpvs("use Devel::");
3068 /* We now allow -d:Module=Foo,Bar */
3069 while(isALNUM(*s) || *s==':') ++s;
3071 sv_catpv(sv, start);
3073 sv_catpvn(sv, start, s-start);
3074 /* Don't use NUL as q// delimiter here, this string goes in the
3076 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3079 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3082 PL_perldb = PERLDB_ALL;
3089 forbid_setid('D', -1);
3091 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3092 #else /* !DEBUGGING */
3093 if (ckWARN_d(WARN_DEBUGGING))
3094 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3095 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3096 for (s++; isALNUM(*s); s++) ;
3101 usage(PL_origargv[0]);
3104 Safefree(PL_inplace);
3105 #if defined(__CYGWIN__) /* do backup extension automagically */
3106 if (*(s+1) == '\0') {
3107 PL_inplace = savepvs(".bak");
3110 #endif /* __CYGWIN__ */
3112 const char *start = ++s;
3113 while (*s && !isSPACE(*s))
3116 PL_inplace = savepvn(start, s - start);
3120 if (*s == '-') /* Additional switches on #! line. */
3124 case 'I': /* -I handled both here and in parse_body() */
3125 forbid_setid('I', -1);
3127 while (*s && isSPACE(*s))
3132 /* ignore trailing spaces (possibly followed by other switches) */
3134 for (e = p; *e && !isSPACE(*e); e++) ;
3138 } while (*p && *p != '-');
3139 e = savepvn(s, e-s);
3140 incpush(e, TRUE, TRUE, FALSE, FALSE);
3147 Perl_croak(aTHX_ "No directory specified for -I");
3153 SvREFCNT_dec(PL_ors_sv);
3159 PL_ors_sv = newSVpvs("\n");
3160 numlen = 3 + (*s == '0');
3161 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3165 if (RsPARA(PL_rs)) {
3166 PL_ors_sv = newSVpvs("\n\n");
3169 PL_ors_sv = newSVsv(PL_rs);
3174 forbid_setid('A', -1);
3176 PL_preambleav = newAV();
3179 char * const start = s;
3180 SV * const sv = newSVpvs("use assertions::activate");
3181 while(isALNUM(*s) || *s == ':') ++s;
3183 sv_catpvs(sv, "::");
3184 sv_catpvn(sv, start, s-start);
3187 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3190 else if (*s != '\0') {
3191 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3193 av_push(PL_preambleav, sv);
3197 forbid_setid('M', -1); /* XXX ? */
3200 forbid_setid('m', -1); /* XXX ? */
3204 const char *use = "use ";
3205 /* -M-foo == 'no foo' */
3206 /* Leading space on " no " is deliberate, to make both
3207 possibilities the same length. */
3208 if (*s == '-') { use = " no "; ++s; }
3209 sv = newSVpvn(use,4);
3211 /* We allow -M'Module qw(Foo Bar)' */
3212 while(isALNUM(*s) || *s==':') ++s;
3214 sv_catpv(sv, start);
3215 if (*(start-1) == 'm') {
3217 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3218 sv_catpvs( sv, " ()");
3222 Perl_croak(aTHX_ "Module name required with -%c option",
3224 sv_catpvn(sv, start, s-start);
3225 sv_catpvs(sv, " split(/,/,q");
3226 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3228 sv_catpvs(sv, "\0)");
3232 PL_preambleav = newAV();
3233 av_push(PL_preambleav, sv);
3236 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3247 forbid_setid('s', -1);
3248 PL_doswitches = TRUE;
3262 #ifdef MACOS_TRADITIONAL
3263 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3265 PL_do_undump = TRUE;
3273 if (!sv_derived_from(PL_patchlevel, "version"))
3274 upg_version(PL_patchlevel);
3276 PerlIO_printf(PerlIO_stdout(),
3277 Perl_form(aTHX_ "\nThis is perl, %"SVf
3278 #ifdef PERL_PATCHNUM
3279 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3282 vstringify(PL_patchlevel),
3285 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3286 PerlIO_printf(PerlIO_stdout(),
3287 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3288 vstringify(PL_patchlevel)));
3289 PerlIO_printf(PerlIO_stdout(),
3290 Perl_form(aTHX_ " built under %s at %s %s\n",
3291 OSNAME, __DATE__, __TIME__));
3292 PerlIO_printf(PerlIO_stdout(),
3293 Perl_form(aTHX_ " OS Specific Release: %s\n",
3297 #if defined(LOCAL_PATCH_COUNT)
3298 if (LOCAL_PATCH_COUNT > 0)
3299 PerlIO_printf(PerlIO_stdout(),
3300 "\n(with %d registered patch%s, "
3301 "see perl -V for more detail)",
3302 (int)LOCAL_PATCH_COUNT,
3303 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "\n\nCopyright 1987-2006, Larry Wall\n");
3308 #ifdef MACOS_TRADITIONAL
3309 PerlIO_printf(PerlIO_stdout(),
3310 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3311 "maintained by Chris Nandor\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3320 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3325 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "atariST series port, ++jrb bammi@cadence.com\n");
3332 PerlIO_printf(PerlIO_stdout(),
3333 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3336 PerlIO_printf(PerlIO_stdout(),
3337 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3344 PerlIO_printf(PerlIO_stdout(),
3345 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3348 PerlIO_printf(PerlIO_stdout(),
3349 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3352 PerlIO_printf(PerlIO_stdout(),
3353 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "MiNT port by Guido Flohr, 1997-1999\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "EPOC port by Olaf Flebbe, 1999-2002\n");
3364 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3365 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3368 #ifdef __SYMBIAN32__
3369 PerlIO_printf(PerlIO_stdout(),
3370 "Symbian port by Nokia, 2004-2005\n");
3372 #ifdef BINARY_BUILD_NOTICE
3373 BINARY_BUILD_NOTICE;
3375 PerlIO_printf(PerlIO_stdout(),
3377 Perl may be copied only under the terms of either the Artistic License or the\n\
3378 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3379 Complete documentation for Perl, including FAQ lists, should be found on\n\
3380 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3381 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3384 if (! (PL_dowarn & G_WARN_ALL_MASK))
3385 PL_dowarn |= G_WARN_ON;
3389 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3390 if (!specialWARN(PL_compiling.cop_warnings))
3391 SvREFCNT_dec(PL_compiling.cop_warnings);
3392 PL_compiling.cop_warnings = pWARN_ALL ;
3396 PL_dowarn = G_WARN_ALL_OFF;
3397 if (!specialWARN(PL_compiling.cop_warnings))
3398 SvREFCNT_dec(PL_compiling.cop_warnings);
3399 PL_compiling.cop_warnings = pWARN_NONE ;
3404 if (s[1] == '-') /* Additional switches on #! line. */
3409 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3415 #ifdef ALTERNATE_SHEBANG
3416 case 'S': /* OS/2 needs -S on "extproc" line. */
3424 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3429 /* compliments of Tom Christiansen */
3431 /* unexec() can be found in the Gnu emacs distribution */
3432 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3435 Perl_my_unexec(pTHX)
3437 PERL_UNUSED_CONTEXT;
3439 SV * prog = newSVpv(BIN_EXP, 0);
3440 SV * file = newSVpv(PL_origfilename, 0);
3444 sv_catpvs(prog, "/perl");
3445 sv_catpvs(file, ".perldump");
3447 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3448 /* unexec prints msg to stderr in case of failure */
3449 PerlProc_exit(status);
3452 # include <lib$routines.h>
3453 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3454 # elif defined(WIN32) || defined(__CYGWIN__)
3455 Perl_croak(aTHX_ "dump is not supported");
3457 ABORT(); /* for use with undump */
3462 /* initialize curinterp */
3468 # define PERLVAR(var,type)
3469 # define PERLVARA(var,n,type)
3470 # if defined(PERL_IMPLICIT_CONTEXT)
3471 # define PERLVARI(var,type,init) aTHX->var = init;
3472 # define PERLVARIC(var,type,init) aTHX->var = init;
3474 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3475 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3477 # include "intrpvar.h"
3478 # include "thrdvar.h"
3484 # define PERLVAR(var,type)
3485 # define PERLVARA(var,n,type)
3486 # define PERLVARI(var,type,init) PL_##var = init;
3487 # define PERLVARIC(var,type,init) PL_##var = init;
3488 # include "intrpvar.h"
3489 # include "thrdvar.h"
3499 S_init_main_stash(pTHX)
3504 PL_curstash = PL_defstash = newHV();
3505 /* We know that the string "main" will be in the global shared string
3506 table, so it's a small saving to use it rather than allocate another
3508 PL_curstname = newSVpvs_share("main");
3509 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3510 /* If we hadn't caused another reference to "main" to be in the shared
3511 string table above, then it would be worth reordering these two,
3512 because otherwise all we do is delete "main" from it as a consequence
3513 of the SvREFCNT_dec, only to add it again with hv_name_set */
3514 SvREFCNT_dec(GvHV(gv));
3515 hv_name_set(PL_defstash, "main", 4, 0);
3516 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3518 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3520 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3521 GvMULTI_on(PL_incgv);
3522 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3523 GvMULTI_on(PL_hintgv);
3524 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3525 SvREFCNT_inc_simple(PL_defgv);
3526 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3527 SvREFCNT_inc_simple(PL_errgv);
3528 GvMULTI_on(PL_errgv);
3529 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3530 GvMULTI_on(PL_replgv);
3531 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3532 #ifdef PERL_DONT_CREATE_GVSV
3535 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3536 sv_setpvn(ERRSV, "", 0);
3537 PL_curstash = PL_defstash;
3538 CopSTASH_set(&PL_compiling, PL_defstash);
3539 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3540 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3542 /* We must init $/ before switches are processed. */
3543 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3547 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3553 const char *cpp_discard_flag;
3562 PL_origfilename = savepvs("-e");
3565 /* if find_script() returns, it returns a malloc()-ed value */
3566 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3568 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3569 const char *s = scriptname + 8;
3575 * Tell apart "normal" usage of fdscript, e.g.
3576 * with bash on FreeBSD:
3577 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3578 * from usage in suidperl.
3579 * Does any "normal" usage leave garbage after the number???
3580 * Is it a mistake to use a similar /dev/fd/ construct for
3585 * Be supersafe and do some sanity-checks.
3586 * Still, can we be sure we got the right thing?
3589 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3592 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3594 scriptname = savepv(s + 1);
3595 Safefree(PL_origfilename);
3596 PL_origfilename = (char *)scriptname;
3601 CopFILE_free(PL_curcop);
3602 CopFILE_set(PL_curcop, PL_origfilename);
3603 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3604 scriptname = (char *)"";
3605 if (fdscript >= 0) {
3606 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3607 # if defined(HAS_FCNTL) && defined(F_SETFD)
3609 /* ensure close-on-exec */
3610 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3615 Perl_croak(aTHX_ "sperl needs fd script\n"
3616 "You should not call sperl directly; do you need to "
3617 "change a #! line\nfrom sperl to perl?\n");
3620 * Do not open (or do other fancy stuff) while setuid.
3621 * Perl does the open, and hands script to suidperl on a fd;
3622 * suidperl only does some checks, sets up UIDs and re-execs
3623 * perl with that fd as it has always done.
3626 if (*suidscript != 1) {
3627 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3630 else if (PL_preprocess) {
3631 const char * const cpp_cfg = CPPSTDIN;
3632 SV * const cpp = newSVpvs("");
3633 SV * const cmd = newSV(0);
3635 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3636 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3637 if (strEQ(cpp_cfg, "cppstdin"))
3638 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3639 sv_catpv(cpp, cpp_cfg);
3642 sv_catpvs(sv, "-I");
3643 sv_catpv(sv,PRIVLIB_EXP);
3646 DEBUG_P(PerlIO_printf(Perl_debug_log,
3647 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3648 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3651 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3658 cpp_discard_flag = "";
3660 cpp_discard_flag = "-C";
3664 perl = os2_execname(aTHX);
3666 perl = PL_origargv[0];
3670 /* This strips off Perl comments which might interfere with
3671 the C pre-processor, including #!. #line directives are
3672 deliberately stripped to avoid confusion with Perl's version
3673 of #line. FWP played some golf with it so it will fit
3674 into VMS's 255 character buffer.
3677 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3679 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3681 Perl_sv_setpvf(aTHX_ cmd, "\
3682 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3683 perl, quote, code, quote, scriptname, cpp,
3684 cpp_discard_flag, sv, CPPMINUS);
3686 PL_doextract = FALSE;
3688 DEBUG_P(PerlIO_printf(Perl_debug_log,
3689 "PL_preprocess: cmd=\"%s\"\n",
3692 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3696 else if (!*scriptname) {
3697 forbid_setid(0, *suidscript);
3698 PL_rsfp = PerlIO_stdin();
3701 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3702 # if defined(HAS_FCNTL) && defined(F_SETFD)
3704 /* ensure close-on-exec */
3705 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3708 #endif /* IAMSUID */
3710 /* PSz 16 Sep 03 Keep neat error message */
3712 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3714 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3715 CopFILE(PL_curcop), Strerror(errno));
3721 * I_SYSSTATVFS HAS_FSTATVFS
3723 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3724 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3725 * here so that metaconfig picks them up. */
3729 S_fd_on_nosuid_fs(pTHX_ int fd)
3732 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3733 * but is needed also on machines without setreuid.
3734 * Seems safe enough to run as root.
3736 int check_okay = 0; /* able to do all the required sys/libcalls */
3737 int on_nosuid = 0; /* the fd is on a nosuid fs */
3739 * Need to check noexec also: nosuid might not be set, the average
3740 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3742 int on_noexec = 0; /* the fd is on a noexec fs */
3745 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3746 * fstatvfs() is UNIX98.
3747 * fstatfs() is 4.3 BSD.
3748 * ustat()+getmnt() is pre-4.3 BSD.
3749 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3750 * an irrelevant filesystem while trying to reach the right one.
3753 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3755 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3756 defined(HAS_FSTATVFS)
3757 # define FD_ON_NOSUID_CHECK_OKAY
3758 struct statvfs stfs;
3760 check_okay = fstatvfs(fd, &stfs) == 0;
3761 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3763 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3764 on platforms where it is present. */
3765 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3767 # endif /* fstatvfs */
3769 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3770 defined(PERL_MOUNT_NOSUID) && \
3771 defined(PERL_MOUNT_NOEXEC) && \
3772 defined(HAS_FSTATFS) && \
3773 defined(HAS_STRUCT_STATFS) && \
3774 defined(HAS_STRUCT_STATFS_F_FLAGS)
3775 # define FD_ON_NOSUID_CHECK_OKAY
3778 check_okay = fstatfs(fd, &stfs) == 0;
3779 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3780 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3781 # endif /* fstatfs */
3783 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3784 defined(PERL_MOUNT_NOSUID) && \
3785 defined(PERL_MOUNT_NOEXEC) && \
3786 defined(HAS_FSTAT) && \
3787 defined(HAS_USTAT) && \
3788 defined(HAS_GETMNT) && \
3789 defined(HAS_STRUCT_FS_DATA) && \
3791 # define FD_ON_NOSUID_CHECK_OKAY
3794 if (fstat(fd, &fdst) == 0) {
3796 if (ustat(fdst.st_dev, &us) == 0) {
3798 /* NOSTAT_ONE here because we're not examining fields which
3799 * vary between that case and STAT_ONE. */
3800 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3801 size_t cmplen = sizeof(us.f_fname);
3802 if (sizeof(fsd.fd_req.path) < cmplen)
3803 cmplen = sizeof(fsd.fd_req.path);
3804 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3805 fdst.st_dev == fsd.fd_req.dev) {
3807 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3808 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3813 # endif /* fstat+ustat+getmnt */
3815 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3816 defined(HAS_GETMNTENT) && \
3817 defined(HAS_HASMNTOPT) && \
3818 defined(MNTOPT_NOSUID) && \
3819 defined(MNTOPT_NOEXEC)
3820 # define FD_ON_NOSUID_CHECK_OKAY
3821 FILE *mtab = fopen("/etc/mtab", "r");
3822 struct mntent *entry;
3825 if (mtab && (fstat(fd, &stb) == 0)) {
3826 while (entry = getmntent(mtab)) {
3827 if (stat(entry->mnt_dir, &fsb) == 0
3828 && fsb.st_dev == stb.st_dev)
3830 /* found the filesystem */
3832 if (hasmntopt(entry, MNTOPT_NOSUID))
3834 if (hasmntopt(entry, MNTOPT_NOEXEC))
3837 } /* A single fs may well fail its stat(). */
3842 # endif /* getmntent+hasmntopt */
3845 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3847 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3849 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3850 return ((!check_okay) || on_nosuid || on_noexec);
3852 #endif /* IAMSUID */
3855 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3856 int fdscript, int suidscript)
3861 #endif /* IAMSUID */
3863 /* do we need to emulate setuid on scripts? */
3865 /* This code is for those BSD systems that have setuid #! scripts disabled
3866 * in the kernel because of a security problem. Merely defining DOSUID
3867 * in perl will not fix that problem, but if you have disabled setuid
3868 * scripts in the kernel, this will attempt to emulate setuid and setgid
3869 * on scripts that have those now-otherwise-useless bits set. The setuid
3870 * root version must be called suidperl or sperlN.NNN. If regular perl
3871 * discovers that it has opened a setuid script, it calls suidperl with
3872 * the same argv that it had. If suidperl finds that the script it has
3873 * just opened is NOT setuid root, it sets the effective uid back to the
3874 * uid. We don't just make perl setuid root because that loses the
3875 * effective uid we had before invoking perl, if it was different from the
3878 * Description/comments above do not match current workings:
3879 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3880 * suidperl called with script open and name changed to /dev/fd/N/X;
3881 * suidperl croaks if script is not setuid;
3882 * making perl setuid would be a huge security risk (and yes, that
3883 * would lose any euid we might have had).
3885 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3886 * be defined in suidperl only. suidperl must be setuid root. The
3887 * Configure script will set this up for you if you want it.
3893 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3894 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3895 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3897 const char *linestr;
3901 if (fdscript < 0 || suidscript != 1)
3902 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3904 * Since the script is opened by perl, not suidperl, some of these
3905 * checks are superfluous. Leaving them in probably does not lower
3909 * Do checks even for systems with no HAS_SETREUID.
3910 * We used to swap, then re-swap UIDs with
3912 if (setreuid(PL_euid,PL_uid) < 0
3913 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3914 Perl_croak(aTHX_ "Can't swap uid and euid");
3917 if (setreuid(PL_uid,PL_euid) < 0
3918 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3919 Perl_croak(aTHX_ "Can't reswap uid and euid");
3923 /* On this access check to make sure the directories are readable,
3924 * there is actually a small window that the user could use to make
3925 * filename point to an accessible directory. So there is a faint
3926 * chance that someone could execute a setuid script down in a
3927 * non-accessible directory. I don't know what to do about that.
3928 * But I don't think it's too important. The manual lies when
3929 * it says access() is useful in setuid programs.
3931 * So, access() is pretty useless... but not harmful... do anyway.
3933 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3934 Perl_croak(aTHX_ "Can't access() script\n");
3937 /* If we can swap euid and uid, then we can determine access rights
3938 * with a simple stat of the file, and then compare device and
3939 * inode to make sure we did stat() on the same file we opened.
3940 * Then we just have to make sure he or she can execute it.
3943 * As the script is opened by perl, not suidperl, we do not need to
3944 * care much about access rights.
3946 * The 'script changed' check is needed, or we can get lied to
3947 * about $0 with e.g.
3948 * suidperl /dev/fd/4//bin/x 4<setuidscript
3949 * Without HAS_SETREUID, is it safe to stat() as root?
3951 * Are there any operating systems that pass /dev/fd/xxx for setuid
3952 * scripts, as suggested/described in perlsec(1)? Surely they do not
3953 * pass the script name as we do, so the "script changed" test would
3954 * fail for them... but we never get here with
3955 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3957 * This is one place where we must "lie" about return status: not
3958 * say if the stat() failed. We are doing this as root, and could
3959 * be tricked into reporting existence or not of files that the
3960 * "plain" user cannot even see.
3964 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3965 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3966 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3967 Perl_croak(aTHX_ "Setuid script changed\n");
3971 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3972 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3975 * We used to do this check as the "plain" user (after swapping
3976 * UIDs). But the check for nosuid and noexec filesystem is needed,
3977 * and should be done even without HAS_SETREUID. (Maybe those
3978 * operating systems do not have such mount options anyway...)
3979 * Seems safe enough to do as root.
3981 #if !defined(NO_NOSUID_CHECK)
3982 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3983 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3986 #endif /* IAMSUID */
3988 if (!S_ISREG(PL_statbuf.st_mode)) {
3989 Perl_croak(aTHX_ "Setuid script not plain file\n");
3991 if (PL_statbuf.st_mode & S_IWOTH)
3992 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3993 PL_doswitches = FALSE; /* -s is insecure in suid */
3994 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3995 CopLINE_inc(PL_curcop);
3996 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
3997 Perl_croak(aTHX_ "No #! line");
3998 linestr = SvPV_nolen_const(PL_linestr);
3999 /* required even on Sys V */
4000 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4001 Perl_croak(aTHX_ "No #! line");
4005 /* Sanity check on line length */
4006 s_end = s + strlen(s);
4007 if (s_end == s || (s_end - s) > 4000)
4008 Perl_croak(aTHX_ "Very long #! line");
4009 /* Allow more than a single space after #! */
4010 while (isSPACE(*s)) s++;
4011 /* Sanity check on buffer end */
4012 while ((*s) && !isSPACE(*s)) s++;
4013 for (s2 = s; (s2 > linestr &&
4014 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4015 || s2[-1] == '-')); s2--) ;
4016 /* Sanity check on buffer start */
4017 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4018 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4019 Perl_croak(aTHX_ "Not a perl script");
4020 while (*s == ' ' || *s == '\t') s++;
4022 * #! arg must be what we saw above. They can invoke it by
4023 * mentioning suidperl explicitly, but they may not add any strange
4024 * arguments beyond what #! says if they do invoke suidperl that way.
4027 * The way validarg was set up, we rely on the kernel to start
4028 * scripts with argv[1] set to contain all #! line switches (the
4032 * Check that we got all the arguments listed in the #! line (not
4033 * just that there are no extraneous arguments). Might not matter
4034 * much, as switches from #! line seem to be acted upon (also), and
4035 * so may be checked and trapped in perl. But, security checks must
4036 * be done in suidperl and not deferred to perl. Note that suidperl
4037 * does not get around to parsing (and checking) the switches on
4038 * the #! line (but execs perl sooner).
4039 * Allow (require) a trailing newline (which may be of two
4040 * characters on some architectures?) (but no other trailing
4043 len = strlen(validarg);
4044 if (strEQ(validarg," PHOOEY ") ||
4045 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4046 !((s_end - s) == len+1
4047 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4048 Perl_croak(aTHX_ "Args must match #! line");
4052 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4053 PL_euid == PL_statbuf.st_uid)
4055 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4056 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4057 #endif /* IAMSUID */
4060 PL_euid) { /* oops, we're not the setuid root perl */
4062 * When root runs a setuid script, we do not go through the same
4063 * steps of execing sperl and then perl with fd scripts, but
4064 * simply set up UIDs within the same perl invocation; so do
4065 * not have the same checks (on options, whatever) that we have
4066 * for plain users. No problem really: would have to be a script
4067 * that does not actually work for plain users; and if root is
4068 * foolish and can be persuaded to run such an unsafe script, he
4069 * might run also non-setuid ones, and deserves what he gets.
4071 * Or, we might drop the PL_euid check above (and rely just on
4072 * fdscript to avoid loops), and do the execs
4078 * Pass fd script to suidperl.
4079 * Exec suidperl, substituting fd script for scriptname.
4080 * Pass script name as "subdir" of fd, which perl will grok;
4081 * in fact will use that to distinguish this from "normal"
4082 * usage, see comments above.
4084 PerlIO_rewind(PL_rsfp);
4085 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4086 /* PSz 27 Feb 04 Sanity checks on scriptname */
4087 if ((!scriptname) || (!*scriptname) ) {
4088 Perl_croak(aTHX_ "No setuid script name\n");
4090 if (*scriptname == '-') {
4091 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4092 /* Or we might confuse it with an option when replacing
4093 * name in argument list, below (though we do pointer, not
4094 * string, comparisons).
4097 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4098 if (!PL_origargv[which]) {
4099 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4101 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4102 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4103 #if defined(HAS_FCNTL) && defined(F_SETFD)
4104 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4107 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4108 (int)PERL_REVISION, (int)PERL_VERSION,
4109 (int)PERL_SUBVERSION), PL_origargv);
4111 #endif /* IAMSUID */
4112 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4115 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4117 * This seems back to front: we try HAS_SETEGID first; if not available
4118 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4119 * in the sense that we only want to set EGID; but are there any machines
4120 * with either of the latter, but not the former? Same with UID, later.
4123 (void)setegid(PL_statbuf.st_gid);
4126 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4128 #ifdef HAS_SETRESGID
4129 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4131 PerlProc_setgid(PL_statbuf.st_gid);
4135 if (PerlProc_getegid() != PL_statbuf.st_gid)
4136 Perl_croak(aTHX_ "Can't do setegid!\n");
4138 if (PL_statbuf.st_mode & S_ISUID) {
4139 if (PL_statbuf.st_uid != PL_euid)
4141 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4144 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4146 #ifdef HAS_SETRESUID
4147 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4149 PerlProc_setuid(PL_statbuf.st_uid);
4153 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4154 Perl_croak(aTHX_ "Can't do seteuid!\n");
4156 else if (PL_uid) { /* oops, mustn't run as root */
4158 (void)seteuid((Uid_t)PL_uid);
4161 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4163 #ifdef HAS_SETRESUID
4164 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4166 PerlProc_setuid((Uid_t)PL_uid);
4170 if (PerlProc_geteuid() != PL_uid)
4171 Perl_croak(aTHX_ "Can't do seteuid!\n");
4174 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4175 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4178 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4179 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4180 else if (fdscript < 0 || suidscript != 1)
4181 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4182 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4184 /* PSz 16 Sep 03 Keep neat error message */
4185 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4188 /* We absolutely must clear out any saved ids here, so we */
4189 /* exec the real perl, substituting fd script for scriptname. */
4190 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4192 * It might be thought that using setresgid and/or setresuid (changed to
4193 * set the saved IDs) above might obviate the need to exec, and we could
4194 * go on to "do the perl thing".
4196 * Is there such a thing as "saved GID", and is that set for setuid (but
4197 * not setgid) execution like suidperl? Without exec, it would not be
4198 * cleared for setuid (but not setgid) scripts (or might need a dummy
4201 * We need suidperl to do the exact same argument checking that perl
4202 * does. Thus it cannot be very small; while it could be significantly
4203 * smaller, it is safer (simpler?) to make it essentially the same
4204 * binary as perl (but they are not identical). - Maybe could defer that
4205 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4206 * but prefer to do thorough checks in suidperl itself. Such deferral
4207 * would make suidperl security rely on perl, a design no-no.
4209 * Setuid things should be short and simple, thus easy to understand and
4210 * verify. They should do their "own thing", without influence by
4211 * attackers. It may help if their internal execution flow is fixed,
4212 * regardless of platform: it may be best to exec anyway.
4214 * Suidperl should at least be conceptually simple: a wrapper only,
4215 * never to do any real perl. Maybe we should put
4217 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4219 * into the perly bits.
4221 PerlIO_rewind(PL_rsfp);
4222 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4224 * Keep original arguments: suidperl already has fd script.
4226 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4227 /* if (!PL_origargv[which]) { */
4228 /* errno = EPERM; */
4229 /* Perl_croak(aTHX_ "Permission denied\n"); */
4231 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4232 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4233 #if defined(HAS_FCNTL) && defined(F_SETFD)
4234 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4237 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4238 (int)PERL_REVISION, (int)PERL_VERSION,
4239 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4241 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4242 #endif /* IAMSUID */
4244 PERL_UNUSED_ARG(fdscript);
4245 PERL_UNUSED_ARG(suidscript);
4246 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4247 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4248 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4249 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4251 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4254 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4255 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4256 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4257 /* not set-id, must be wrapped */
4260 PERL_UNUSED_ARG(validarg);
4261 PERL_UNUSED_ARG(scriptname);
4265 S_find_beginning(pTHX)
4269 register const char *s2;
4270 #ifdef MACOS_TRADITIONAL
4274 /* skip forward in input to the real script? */
4276 #ifdef MACOS_TRADITIONAL
4277 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4279 while (PL_doextract || gMacPerl_AlwaysExtract) {
4280 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4281 if (!gMacPerl_AlwaysExtract)
4282 Perl_croak(aTHX_ "No Perl script found in input\n");
4284 if (PL_doextract) /* require explicit override ? */
4285 if (!OverrideExtract(PL_origfilename))
4286 Perl_croak(aTHX_ "User aborted script\n");
4288 PL_doextract = FALSE;
4290 /* Pater peccavi, file does not have #! */
4291 PerlIO_rewind(PL_rsfp);
4296 while (PL_doextract) {
4297 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4298 Perl_croak(aTHX_ "No Perl script found in input\n");
4301 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4302 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4303 PL_doextract = FALSE;
4304 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4306 while (*s == ' ' || *s == '\t') s++;
4308 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4309 || s2[-1] == '_') s2--;
4310 if (strnEQ(s2-4,"perl",4))
4311 while ((s = moreswitches(s)))
4314 #ifdef MACOS_TRADITIONAL
4315 /* We are always searching for the #!perl line in MacPerl,
4316 * so if we find it, still keep the line count correct
4317 * by counting lines we already skipped over
4319 for (; maclines > 0 ; maclines--)
4320 PerlIO_ungetc(PL_rsfp, '\n');
4324 /* gMacPerl_AlwaysExtract is false in MPW tool */
4325 } else if (gMacPerl_AlwaysExtract) {
4337 PL_uid = PerlProc_getuid();
4338 PL_euid = PerlProc_geteuid();
4339 PL_gid = PerlProc_getgid();
4340 PL_egid = PerlProc_getegid();
4342 PL_uid |= PL_gid << 16;
4343 PL_euid |= PL_egid << 16;
4345 /* Should not happen: */
4346 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4347 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4350 * Should go by suidscript, not uid!=euid: why disallow
4351 * system("ls") in scripts run from setuid things?
4352 * Or, is this run before we check arguments and set suidscript?
4353 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4354 * (We never have suidscript, can we be sure to have fdscript?)
4355 * Or must then go by UID checks? See comments in forbid_setid also.
4359 /* This is used very early in the lifetime of the program,
4360 * before even the options are parsed, so PL_tainting has
4361 * not been initialized properly. */
4363 Perl_doing_taint(int argc, char *argv[], char *envp[])
4365 #ifndef PERL_IMPLICIT_SYS
4366 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4367 * before we have an interpreter-- and the whole point of this
4368 * function is to be called at such an early stage. If you are on
4369 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4370 * "tainted because running with altered effective ids', you'll
4371 * have to add your own checks somewhere in here. The two most
4372 * known samples of 'implicitness' are Win32 and NetWare, neither
4373 * of which has much of concept of 'uids'. */
4374 int uid = PerlProc_getuid();
4375 int euid = PerlProc_geteuid();
4376 int gid = PerlProc_getgid();
4377 int egid = PerlProc_getegid();
4384 if (uid && (euid != uid || egid != gid))
4386 #endif /* !PERL_IMPLICIT_SYS */
4387 /* This is a really primitive check; environment gets ignored only
4388 * if -T are the first chars together; otherwise one gets
4389 * "Too late" message. */
4390 if ( argc > 1 && argv[1][0] == '-'
4391 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4396 /* Passing the flag as a single char rather than a string is a slight space
4397 optimisation. The only message that isn't /^-.$/ is
4398 "program input from stdin", which is substituted in place of '\0', which
4399 could never be a command line flag. */
4401 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4404 char string[3] = "-x";
4405 const char *message = "program input from stdin";
4412 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4413 if (PL_euid != PL_uid)
4414 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4415 if (PL_egid != PL_gid)
4416 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4417 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4419 * Checks for UID/GID above "wrong": why disallow
4420 * perl -e 'print "Hello\n"'
4421 * from within setuid things?? Simply drop them: replaced by
4422 * fdscript/suidscript and #ifdef IAMSUID checks below.
4424 * This may be too late for command-line switches. Will catch those on
4425 * the #! line, after finding the script name and setting up
4426 * fdscript/suidscript. Note that suidperl does not get around to
4427 * parsing (and checking) the switches on the #! line, but checks that
4428 * the two sets are identical.
4430 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4431 * instead, or would that be "too late"? (We never have suidscript, can
4432 * we be sure to have fdscript?)
4434 * Catch things with suidscript (in descendant of suidperl), even with
4435 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4436 * below; but I am paranoid.
4438 * Also see comments about root running a setuid script, elsewhere.
4440 if (suidscript >= 0)
4441 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4443 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4444 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4445 #endif /* IAMSUID */
4449 Perl_init_debugger(pTHX)
4452 HV * const ostash = PL_curstash;
4454 PL_curstash = PL_debstash;
4455 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4457 AvREAL_off(PL_dbargs);
4458 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4459 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4460 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4461 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4462 sv_setiv(PL_DBsingle, 0);
4463 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4464 sv_setiv(PL_DBtrace, 0);
4465 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4466 sv_setiv(PL_DBsignal, 0);
4467 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4468 sv_setiv(PL_DBassertion, 0);
4469 PL_curstash = ostash;
4472 #ifndef STRESS_REALLOC
4473 #define REASONABLE(size) (size)
4475 #define REASONABLE(size) (1) /* unreasonable */
4479 Perl_init_stacks(pTHX)
4482 /* start with 128-item stack and 8K cxstack */
4483 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4484 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4485 PL_curstackinfo->si_type = PERLSI_MAIN;
4486 PL_curstack = PL_curstackinfo->si_stack;
4487 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4489 PL_stack_base = AvARRAY(PL_curstack);
4490 PL_stack_sp = PL_stack_base;
4491 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4493 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4496 PL_tmps_max = REASONABLE(128);
4498 Newx(PL_markstack,REASONABLE(32),I32);
4499 PL_markstack_ptr = PL_markstack;
4500 PL_markstack_max = PL_markstack + REASONABLE(32);
4504 Newx(PL_scopestack,REASONABLE(32),I32);
4505 PL_scopestack_ix = 0;
4506 PL_scopestack_max = REASONABLE(32);
4508 Newx(PL_savestack,REASONABLE(128),ANY);
4509 PL_savestack_ix = 0;
4510 PL_savestack_max = REASONABLE(128);
4519 while (PL_curstackinfo->si_next)
4520 PL_curstackinfo = PL_curstackinfo->si_next;
4521 while (PL_curstackinfo) {
4522 PERL_SI *p = PL_curstackinfo->si_prev;
4523 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4524 Safefree(PL_curstackinfo->si_cxstack);
4525 Safefree(PL_curstackinfo);
4526 PL_curstackinfo = p;
4528 Safefree(PL_tmps_stack);
4529 Safefree(PL_markstack);
4530 Safefree(PL_scopestack);
4531 Safefree(PL_savestack);
4541 lex_start(PL_linestr);
4543 PL_subname = newSVpvs("main");
4547 S_init_predump_symbols(pTHX)
4553 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4554 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4555 GvMULTI_on(PL_stdingv);
4556 io = GvIOp(PL_stdingv);
4557 IoTYPE(io) = IoTYPE_RDONLY;
4558 IoIFP(io) = PerlIO_stdin();
4559 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4561 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4563 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4566 IoTYPE(io) = IoTYPE_WRONLY;
4567 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4569 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4574 GvMULTI_on(PL_stderrgv);
4575 io = GvIOp(PL_stderrgv);
4576 IoTYPE(io) = IoTYPE_WRONLY;
4577 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4578 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4580 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4582 PL_statname = newSV(0); /* last filename we did stat on */
4584 Safefree(PL_osname);
4585 PL_osname = savepv(OSNAME);
4589 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4592 argc--,argv++; /* skip name of script */
4593 if (PL_doswitches) {
4594 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4598 if (argv[0][1] == '-' && !argv[0][2]) {
4602 if ((s = strchr(argv[0], '='))) {
4603 const char *const start_name = argv[0] + 1;
4604 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4605 TRUE, SVt_PV)), s + 1);
4608 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4611 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4612 GvMULTI_on(PL_argvgv);
4613 (void)gv_AVadd(PL_argvgv);
4614 av_clear(GvAVn(PL_argvgv));
4615 for (; argc > 0; argc--,argv++) {
4616 SV * const sv = newSVpv(argv[0],0);
4617 av_push(GvAVn(PL_argvgv),sv);
4618 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4619 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4622 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4623 (void)sv_utf8_decode(sv);
4629 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4634 PL_toptarget = newSV(0);
4635 sv_upgrade(PL_toptarget, SVt_PVFM);
4636 sv_setpvn(PL_toptarget, "", 0);
4637 PL_bodytarget = newSV(0);
4638 sv_upgrade(PL_bodytarget, SVt_PVFM);
4639 sv_setpvn(PL_bodytarget, "", 0);
4640 PL_formtarget = PL_bodytarget;
4644 init_argv_symbols(argc,argv);
4646 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4647 #ifdef MACOS_TRADITIONAL
4648 /* $0 is not majick on a Mac */
4649 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4651 sv_setpv(GvSV(tmpgv),PL_origfilename);
4652 magicname("0", "0", 1);
4655 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4657 GvMULTI_on(PL_envgv);
4658 hv = GvHVn(PL_envgv);
4659 hv_magic(hv, NULL, PERL_MAGIC_env);
4661 #ifdef USE_ENVIRON_ARRAY
4662 /* Note that if the supplied env parameter is actually a copy
4663 of the global environ then it may now point to free'd memory
4664 if the environment has been modified since. To avoid this
4665 problem we treat env==NULL as meaning 'use the default'
4670 # ifdef USE_ITHREADS
4671 && PL_curinterp == aTHX
4678 char** origenv = environ;
4681 for (; *env; env++) {
4682 if (!(s = strchr(*env,'=')) || s == *env)
4684 #if defined(MSDOS) && !defined(DJGPP)
4689 sv = newSVpv(s+1, 0);
4690 (void)hv_store(hv, *env, s - *env, sv, 0);
4693 if (origenv != environ) {
4694 /* realloc has shifted us */
4695 env = (env - origenv) + environ;
4700 #endif /* USE_ENVIRON_ARRAY */
4701 #endif /* !PERL_MICRO */
4704 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4705 SvREADONLY_off(GvSV(tmpgv));
4706 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4707 SvREADONLY_on(GvSV(tmpgv));
4709 #ifdef THREADS_HAVE_PIDS
4710 PL_ppid = (IV)getppid();
4713 /* touch @F array to prevent spurious warnings 20020415 MJD */
4715 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4717 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4718 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4719 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4723 S_init_perllib(pTHX)
4729 s = PerlEnv_getenv("PERL5LIB");
4731 * It isn't possible to delete an environment variable with
4732 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4733 * case we treat PERL5LIB as undefined if it has a zero-length value.
4735 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4736 if (s && *s != '\0')
4740 incpush(s, TRUE, TRUE, TRUE, FALSE);
4742 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4744 /* Treat PERL5?LIB as a possible search list logical name -- the
4745 * "natural" VMS idiom for a Unix path string. We allow each
4746 * element to be a set of |-separated directories for compatibility.
4750 if (my_trnlnm("PERL5LIB",buf,0))
4751 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4753 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4757 /* Use the ~-expanded versions of APPLLIB (undocumented),
4758 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4761 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4765 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4767 #ifdef MACOS_TRADITIONAL
4770 SV * privdir = newSV(0);
4771 char * macperl = PerlEnv_getenv("MACPERL");
4776 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4777 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4778 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4779 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4780 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4781 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4783 SvREFCNT_dec(privdir);
4786 incpush(":", FALSE, FALSE, TRUE, FALSE);
4789 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4792 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4794 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4798 /* sitearch is always relative to sitelib on Windows for
4799 * DLL-based path intuition to work correctly */
4800 # if !defined(WIN32)
4801 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4807 /* this picks up sitearch as well */
4808 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4810 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4814 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4815 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4818 #ifdef PERL_VENDORARCH_EXP
4819 /* vendorarch is always relative to vendorlib on Windows for
4820 * DLL-based path intuition to work correctly */
4821 # if !defined(WIN32)
4822 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4826 #ifdef PERL_VENDORLIB_EXP
4828 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4830 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4834 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4835 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4838 #ifdef PERL_OTHERLIBDIRS
4839 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4843 incpush(".", FALSE, FALSE, TRUE, FALSE);
4844 #endif /* MACOS_TRADITIONAL */
4847 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4848 # define PERLLIB_SEP ';'
4851 # define PERLLIB_SEP '|'
4853 # if defined(MACOS_TRADITIONAL)
4854 # define PERLLIB_SEP ','
4856 # define PERLLIB_SEP ':'
4860 #ifndef PERLLIB_MANGLE
4861 # define PERLLIB_MANGLE(s,n) (s)
4864 /* Push a directory onto @INC if it exists.
4865 Generate a new SV if we do this, to save needing to copy the SV we push
4868 S_incpush_if_exists(pTHX_ SV *dir)
4872 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4873 S_ISDIR(tmpstatbuf.st_mode)) {
4874 av_push(GvAVn(PL_incgv), dir);
4881 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4886 const char *p = dir;
4891 if (addsubdirs || addoldvers) {
4895 /* Break at all separators */
4897 SV *libdir = newSV(0);
4900 /* skip any consecutive separators */
4902 while ( *p == PERLLIB_SEP ) {
4903 /* Uncomment the next line for PATH semantics */
4904 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4909 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4910 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4915 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4916 p = NULL; /* break out */
4918 #ifdef MACOS_TRADITIONAL
4919 if (!strchr(SvPVX(libdir), ':')) {
4922 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4924 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4925 sv_catpvs(libdir, ":");
4928 /* Do the if() outside the #ifdef to avoid warnings about an unused
4931 #ifdef PERL_RELOCATABLE_INC
4933 * Relocatable include entries are marked with a leading .../
4936 * 0: Remove that leading ".../"
4937 * 1: Remove trailing executable name (anything after the last '/')
4938 * from the perl path to give a perl prefix
4940 * While the @INC element starts "../" and the prefix ends with a real
4941 * directory (ie not . or ..) chop that real directory off the prefix
4942 * and the leading "../" from the @INC element. ie a logical "../"
4944 * Finally concatenate the prefix and the remainder of the @INC element
4945 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4946 * generates /usr/local/lib/perl5
4948 const char *libpath = SvPVX(libdir);
4949 STRLEN libpath_len = SvCUR(libdir);
4950 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4952 SV * const caret_X = get_sv("\030", 0);
4953 /* Going to use the SV just as a scratch buffer holding a C
4959 /* $^X is *the* source of taint if tainting is on, hence
4960 SvPOK() won't be true. */
4962 assert(SvPOKp(caret_X));
4963 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4964 /* Firstly take off the leading .../
4965 If all else fail we'll do the paths relative to the current
4967 sv_chop(libdir, libpath + 4);
4968 /* Don't use SvPV as we're intentionally bypassing taining,
4969 mortal copies that the mg_get of tainting creates, and
4970 corruption that seems to come via the save stack.
4971 I guess that the save stack isn't correctly set up yet. */
4972 libpath = SvPVX(libdir);
4973 libpath_len = SvCUR(libdir);
4975 /* This would work more efficiently with memrchr, but as it's
4976 only a GNU extension we'd need to probe for it and
4977 implement our own. Not hard, but maybe not worth it? */
4979 prefix = SvPVX(prefix_sv);
4980 lastslash = strrchr(prefix, '/');
4982 /* First time in with the *lastslash = '\0' we just wipe off
4983 the trailing /perl from (say) /usr/foo/bin/perl
4987 while ((*lastslash = '\0'), /* Do that, come what may. */
4988 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4989 && (lastslash = strrchr(prefix, '/')))) {
4990 if (lastslash[1] == '\0'
4991 || (lastslash[1] == '.'
4992 && (lastslash[2] == '/' /* ends "/." */
4993 || (lastslash[2] == '/'
4994 && lastslash[3] == '/' /* or "/.." */
4996 /* Prefix ends "/" or "/." or "/..", any of which
4997 are fishy, so don't do any more logical cleanup.
5001 /* Remove leading "../" from path */
5004 /* Next iteration round the loop removes the last
5005 directory name from prefix by writing a '\0' in
5006 the while clause. */
5008 /* prefix has been terminated with a '\0' to the correct
5009 length. libpath points somewhere into the libdir SV.
5010 We need to join the 2 with '/' and drop the result into
5012 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5013 SvREFCNT_dec(libdir);
5014 /* And this is the new libdir. */
5017 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5018 /* Need to taint reloccated paths if running set ID */
5019 SvTAINTED_on(libdir);
5022 SvREFCNT_dec(prefix_sv);
5027 * BEFORE pushing libdir onto @INC we may first push version- and
5028 * archname-specific sub-directories.
5030 if (addsubdirs || addoldvers) {
5031 #ifdef PERL_INC_VERSION_LIST
5032 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5033 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5034 const char * const *incver;
5040 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5042 while (unix[len-1] == '/') len--; /* Cosmetic */
5043 sv_usepvn(libdir,unix,len);
5046 PerlIO_printf(Perl_error_log,
5047 "Failed to unixify @INC element \"%s\"\n",
5051 #ifdef MACOS_TRADITIONAL
5052 #define PERL_AV_SUFFIX_FMT ""
5053 #define PERL_ARCH_FMT "%s:"
5054 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5056 #define PERL_AV_SUFFIX_FMT "/"
5057 #define PERL_ARCH_FMT "/%s"
5058 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5060 /* .../version/archname if -d .../version/archname */
5061 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5063 (int)PERL_REVISION, (int)PERL_VERSION,
5064 (int)PERL_SUBVERSION, ARCHNAME);
5065 subdir = S_incpush_if_exists(aTHX_ subdir);
5067 /* .../version if -d .../version */
5068 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
5069 (int)PERL_REVISION, (int)PERL_VERSION,
5070 (int)PERL_SUBVERSION);
5071 subdir = S_incpush_if_exists(aTHX_ subdir);
5073 /* .../archname if -d .../archname */
5074 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
5075 subdir = S_incpush_if_exists(aTHX_ subdir);
5079 #ifdef PERL_INC_VERSION_LIST
5081 for (incver = incverlist; *incver; incver++) {
5082 /* .../xxx if -d .../xxx */
5083 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
5084 subdir = S_incpush_if_exists(aTHX_ subdir);
5090 /* finally push this lib directory on the end of @INC */
5091 av_push(GvAVn(PL_incgv), libdir);
5094 assert (SvREFCNT(subdir) == 1);
5095 SvREFCNT_dec(subdir);
5101 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5105 const line_t oldline = CopLINE(PL_curcop);
5111 while (av_len(paramList) >= 0) {
5112 cv = (CV*)av_shift(paramList);
5114 if (paramList == PL_beginav) {
5115 /* save PL_beginav for compiler */
5116 if (! PL_beginav_save)
5117 PL_beginav_save = newAV();
5118 av_push(PL_beginav_save, (SV*)cv);
5120 else if (paramList == PL_checkav) {
5121 /* save PL_checkav for compiler */
5122 if (! PL_checkav_save)
5123 PL_checkav_save = newAV();
5124 av_push(PL_checkav_save, (SV*)cv);
5135 PL_madskills |= 16384;
5140 PL_madskills &= ~16384;
5143 (void)SvPV_const(atsv, len);
5144 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5145 break; /* not really trying to run, so just wing it */
5147 PL_curcop = &PL_compiling;
5148 CopLINE_set(PL_curcop, oldline);
5149 if (paramList == PL_beginav)
5150 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5152 Perl_sv_catpvf(aTHX_ atsv,
5153 "%s failed--call queue aborted",
5154 paramList == PL_checkav ? "CHECK"
5155 : paramList == PL_initav ? "INIT"
5157 while (PL_scopestack_ix > oldscope)
5160 Perl_croak(aTHX_ "%"SVf"", atsv);
5167 /* my_exit() was called */
5168 while (PL_scopestack_ix > oldscope)
5171 PL_curstash = PL_defstash;
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5175 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5176 return; /* not really trying to run, so just wing it */
5177 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5178 if (paramList == PL_beginav)
5179 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5181 Perl_croak(aTHX_ "%s failed--call queue aborted",
5182 paramList == PL_checkav ? "CHECK"
5183 : paramList == PL_initav ? "INIT"
5190 PL_curcop = &PL_compiling;
5191 CopLINE_set(PL_curcop, oldline);
5194 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5203 S_call_list_body(pTHX_ CV *cv)
5206 PUSHMARK(PL_stack_sp);
5207 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5212 Perl_my_exit(pTHX_ U32 status)
5215 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5216 thr, (unsigned long) status));
5225 STATUS_EXIT_SET(status);
5232 Perl_my_failure_exit(pTHX)
5236 /* We have been called to fall on our sword. The desired exit code
5237 * should be already set in STATUS_UNIX, but could be shifted over
5238 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5241 * If an error code has not been set, then force the issue.
5243 if (MY_POSIX_EXIT) {
5245 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5246 * the exit code when there isn't an error.
5249 if (STATUS_UNIX == 0)
5250 STATUS_UNIX_EXIT_SET(255);
5252 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5254 /* The exit code could have been set by $? or vmsish which
5255 * means that it may not be fatal. So convert
5256 * success/warning codes to fatal.
5258 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5259 STATUS_UNIX_EXIT_SET(255);
5263 /* Traditionally Perl on VMS always expects a Fatal Error. */
5264 if (vaxc$errno & 1) {
5266 /* So force success status to failure */
5267 if (STATUS_NATIVE & 1)
5272 STATUS_UNIX = EINTR; /* In case something cares */
5277 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5279 /* Encode the severity code */
5280 severity = STATUS_NATIVE & STS$M_SEVERITY;
5281 STATUS_UNIX = (severity ? severity : 1) << 8;
5283 /* Perl expects this to be a fatal error */
5284 if (severity != STS$K_SEVERE)
5293 STATUS_UNIX_SET(errno);
5295 exitstatus = STATUS_UNIX >> 8;
5296 if (exitstatus & 255)
5297 STATUS_UNIX_SET(exitstatus);
5299 STATUS_UNIX_SET(255);
5306 S_my_exit_jump(pTHX)
5311 SvREFCNT_dec(PL_e_script);
5315 POPSTACK_TO(PL_mainstack);
5323 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5326 const char * const p = SvPVX_const(PL_e_script);
5327 const char *nl = strchr(p, '\n');
5329 PERL_UNUSED_ARG(idx);
5330 PERL_UNUSED_ARG(maxlen);
5332 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5334 filter_del(read_e_script);
5337 sv_catpvn(buf_sv, p, nl-p);
5338 sv_chop(PL_e_script, nl);
5344 * c-indentation-style: bsd
5346 * indent-tabs-mode: t
5349 * ex: set ts=8 sts=4 sw=4 noet: