3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
184 #ifdef PERL_IMPLICIT_SYS
186 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
187 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
188 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
189 struct IPerlDir* ipD, struct IPerlSock* ipS,
190 struct IPerlProc* ipP)
192 PerlInterpreter *my_perl;
193 /* Newx() needs interpreter, so call malloc() instead */
194 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 Zero(my_perl, 1, PerlInterpreter);
206 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
213 =head1 Embedding Functions
215 =for apidoc perl_alloc
217 Allocates a new Perl interpreter. See L<perlembed>.
225 PerlInterpreter *my_perl;
227 /* Newx() needs interpreter, so call malloc() instead */
228 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
230 S_init_tls_and_interp(my_perl);
231 #ifndef PERL_TRACK_MEMPOOL
232 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
234 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
239 #endif /* PERL_IMPLICIT_SYS */
242 =for apidoc perl_construct
244 Initializes a new Perl interpreter. See L<perlembed>.
250 perl_construct(pTHXx)
253 PERL_UNUSED_ARG(my_perl);
256 PL_perl_destruct_level = 1;
258 if (PL_perl_destruct_level > 0)
261 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
263 PL_linestr = newSV_type(SVt_PVIV);
264 SvGROW(PL_linestr, 80);
266 /* set read-only and try to insure than we wont see REFCNT==0
269 SvREADONLY_on(&PL_sv_undef);
270 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
272 sv_setpv(&PL_sv_no,PL_No);
273 /* value lookup in void context - happens to have the side effect
274 of caching the numeric forms. */
277 SvREADONLY_on(&PL_sv_no);
278 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
280 sv_setpv(&PL_sv_yes,PL_Yes);
283 SvREADONLY_on(&PL_sv_yes);
284 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
286 SvREADONLY_on(&PL_sv_placeholder);
287 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
289 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
290 #ifdef PERL_USES_PL_PIDSTATUS
291 PL_pidstatus = newHV();
294 PL_rs = newSVpvs("\n");
299 PL_lex_state = LEX_NOTPARSING;
305 SET_NUMERIC_STANDARD();
307 #if defined(LOCAL_PATCH_COUNT)
308 PL_localpatches = local_patches; /* For possible -v */
311 #ifdef HAVE_INTERP_INTERN
315 PerlIO_init(aTHX); /* Hook to IO system */
317 PL_fdpid = newAV(); /* for remembering popen pids by fd */
318 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
319 PL_errors = newSVpvs("");
320 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
321 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
322 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
324 /* First entry is an array of empty elements */
325 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
326 PL_regex_pad = AvARRAY(PL_regex_padav);
328 #ifdef USE_REENTRANT_API
329 Perl_reentrant_init(aTHX);
332 /* Note that strtab is a rather special HV. Assumptions are made
333 about not iterating on it, and not adding tie magic to it.
334 It is properly deallocated in perl_destruct() */
337 HvSHAREKEYS_off(PL_strtab); /* mandatory */
338 hv_ksplit(PL_strtab, 512);
340 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
341 _dyld_lookup_and_bind
342 ("__environ", (unsigned long *) &environ_pointer, NULL);
346 # ifdef USE_ENVIRON_ARRAY
347 PL_origenviron = environ;
351 /* Use sysconf(_SC_CLK_TCK) if available, if not
352 * available or if the sysconf() fails, use the HZ.
353 * BeOS has those, but returns the wrong value.
354 * The HZ if not originally defined has been by now
355 * been defined as CLK_TCK, if available. */
356 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
357 PL_clocktick = sysconf(_SC_CLK_TCK);
358 if (PL_clocktick <= 0)
362 PL_stashcache = newHV();
364 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
365 (int)PERL_VERSION, (int)PERL_SUBVERSION);
368 if (!PL_mmap_page_size) {
369 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
371 SETERRNO(0, SS_NORMAL);
373 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
375 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
377 if ((long) PL_mmap_page_size < 0) {
379 SV * const error = ERRSV;
380 SvUPGRADE(error, SVt_PV);
381 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
384 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
388 # ifdef HAS_GETPAGESIZE
389 PL_mmap_page_size = getpagesize();
391 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
392 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
396 if (PL_mmap_page_size <= 0)
397 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
398 (IV) PL_mmap_page_size);
400 #endif /* HAS_MMAP */
402 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
403 PL_timesbase.tms_utime = 0;
404 PL_timesbase.tms_stime = 0;
405 PL_timesbase.tms_cutime = 0;
406 PL_timesbase.tms_cstime = 0;
413 =for apidoc nothreadhook
415 Stub that provides thread hook for perl_destruct when there are
422 Perl_nothreadhook(pTHX)
428 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
430 Perl_dump_sv_child(pTHX_ SV *sv)
433 const int sock = PL_dumper_fd;
434 const int debug_fd = PerlIO_fileno(Perl_debug_log);
435 union control_un control;
438 struct cmsghdr *cmptr;
440 unsigned char buffer[256];
442 if(sock == -1 || debug_fd == -1)
445 PerlIO_flush(Perl_debug_log);
447 /* All these shenanigans are to pass a file descriptor over to our child for
448 it to dump out to. We can't let it hold open the file descriptor when it
449 forks, as the file descriptor it will dump to can turn out to be one end
450 of pipe that some other process will wait on for EOF. (So as it would
451 be open, the wait would be forever.) */
453 msg.msg_control = control.control;
454 msg.msg_controllen = sizeof(control.control);
455 /* We're a connected socket so we don't need a destination */
461 cmptr = CMSG_FIRSTHDR(&msg);
462 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
463 cmptr->cmsg_level = SOL_SOCKET;
464 cmptr->cmsg_type = SCM_RIGHTS;
465 *((int *)CMSG_DATA(cmptr)) = 1;
467 vec[0].iov_base = (void*)&sv;
468 vec[0].iov_len = sizeof(sv);
469 got = sendmsg(sock, &msg, 0);
472 perror("Debug leaking scalars parent sendmsg failed");
475 if(got < sizeof(sv)) {
476 perror("Debug leaking scalars parent short sendmsg");
480 /* Return protocol is
482 unsigned char: length of location string (0 for empty)
483 unsigned char*: string (not terminated)
485 vec[0].iov_base = (void*)&returned_errno;
486 vec[0].iov_len = sizeof(returned_errno);
487 vec[1].iov_base = buffer;
490 got = readv(sock, vec, 2);
493 perror("Debug leaking scalars parent read failed");
494 PerlIO_flush(PerlIO_stderr());
497 if(got < sizeof(returned_errno) + 1) {
498 perror("Debug leaking scalars parent short read");
499 PerlIO_flush(PerlIO_stderr());
504 got = read(sock, buffer + 1, *buffer);
506 perror("Debug leaking scalars parent read 2 failed");
507 PerlIO_flush(PerlIO_stderr());
512 perror("Debug leaking scalars parent short read 2");
513 PerlIO_flush(PerlIO_stderr());
518 if (returned_errno || *buffer) {
519 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
520 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
521 returned_errno, strerror(returned_errno));
527 =for apidoc perl_destruct
529 Shuts down a Perl interpreter. See L<perlembed>.
538 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
540 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
544 PERL_UNUSED_ARG(my_perl);
546 /* wait for all pseudo-forked children to finish */
547 PERL_WAIT_FOR_CHILDREN;
549 destruct_level = PL_perl_destruct_level;
552 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
554 const int i = atoi(s);
555 if (destruct_level < i)
561 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
567 if (PL_endav && !PL_minus_c)
568 call_list(PL_scopestack_ix, PL_endav);
574 /* Need to flush since END blocks can produce output */
577 if (CALL_FPTR(PL_threadhook)(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1];
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 SvREFCNT_dec(PL_main_cv);
758 /* Tell PerlIO we are about to tear things apart in case
759 we have layers which are using resources that should
763 PerlIO_destruct(aTHX);
765 if (PL_sv_objcount) {
767 * Try to destruct global references. We do this first so that the
768 * destructors and destructees still exist. Some sv's might remain.
769 * Non-referenced objects are on their own.
773 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
774 PL_defoutgv = NULL; /* may have been freed */
777 /* unhook hooks which will soon be, or use, destroyed data */
778 SvREFCNT_dec(PL_warnhook);
780 SvREFCNT_dec(PL_diehook);
783 /* call exit list functions */
784 while (PL_exitlistlen-- > 0)
785 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
787 Safefree(PL_exitlist);
792 /* jettison our possibly duplicated environment */
793 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
794 * so we certainly shouldn't free it here
797 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
798 if (environ != PL_origenviron && !PL_use_safe_putenv
800 /* only main thread can free environ[0] contents */
801 && PL_curinterp == aTHX
807 for (i = 0; environ[i]; i++)
808 safesysfree(environ[i]);
810 /* Must use safesysfree() when working with environ. */
811 safesysfree(environ);
813 environ = PL_origenviron;
816 #endif /* !PERL_MICRO */
818 if (destruct_level == 0) {
820 DEBUG_P(debprofdump());
822 #if defined(PERLIO_LAYERS)
823 /* No more IO - including error messages ! */
824 PerlIO_cleanup(aTHX);
827 CopFILE_free(&PL_compiling);
828 CopSTASH_free(&PL_compiling);
830 /* The exit() function will do everything that needs doing. */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
844 I32 i = AvFILLp(PL_regex_padav) + 1;
845 SV * const * const ary = AvARRAY(PL_regex_padav);
848 SV * const resv = ary[--i];
850 if (SvFLAGS(resv) & SVf_BREAK) {
851 /* this is PL_reg_curpm, already freed
852 * flag is set in regexec.c:S_regtry
854 SvFLAGS(resv) &= ~SVf_BREAK;
856 else if(SvREPADTMP(resv)) {
857 SvREPADTMP_off(resv);
859 else if(SvIOKp(resv)) {
860 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
865 SvREFCNT_dec(PL_regex_padav);
866 PL_regex_padav = NULL;
870 SvREFCNT_dec((SV*) PL_stashcache);
871 PL_stashcache = NULL;
873 /* loosen bonds of global variables */
876 (void)PerlIO_close(PL_rsfp);
880 /* Filters for program text */
881 SvREFCNT_dec(PL_rsfp_filters);
882 PL_rsfp_filters = NULL;
885 Safefree(PL_splitstr);
890 PL_preprocess = FALSE;
896 PL_doswitches = FALSE;
897 PL_dowarn = G_WARN_OFF;
898 PL_doextract = FALSE;
899 PL_sawampersand = FALSE; /* must save all match strings */
902 Safefree(PL_inplace);
904 SvREFCNT_dec(PL_patchlevel);
907 SvREFCNT_dec(PL_e_script);
913 /* magical thingies */
915 SvREFCNT_dec(PL_ofs_sv); /* $, */
918 SvREFCNT_dec(PL_ors_sv); /* $\ */
921 SvREFCNT_dec(PL_rs); /* $/ */
924 Safefree(PL_osname); /* $^O */
927 SvREFCNT_dec(PL_statname);
931 /* defgv, aka *_ should be taken care of elsewhere */
933 /* clean up after study() */
934 SvREFCNT_dec(PL_lastscream);
935 PL_lastscream = NULL;
936 Safefree(PL_screamfirst);
938 Safefree(PL_screamnext);
942 Safefree(PL_efloatbuf);
946 /* startup and shutdown function lists */
947 SvREFCNT_dec(PL_beginav);
948 SvREFCNT_dec(PL_beginav_save);
949 SvREFCNT_dec(PL_endav);
950 SvREFCNT_dec(PL_checkav);
951 SvREFCNT_dec(PL_checkav_save);
952 SvREFCNT_dec(PL_unitcheckav);
953 SvREFCNT_dec(PL_unitcheckav_save);
954 SvREFCNT_dec(PL_initav);
956 PL_beginav_save = NULL;
959 PL_checkav_save = NULL;
960 PL_unitcheckav = NULL;
961 PL_unitcheckav_save = NULL;
964 /* shortcuts just get cleared */
973 PL_last_in_gv = NULL;
981 PL_DBassertion = NULL;
986 SvREFCNT_dec(PL_argvout_stack);
987 PL_argvout_stack = NULL;
989 SvREFCNT_dec(PL_modglobal);
991 SvREFCNT_dec(PL_preambleav);
992 PL_preambleav = NULL;
993 SvREFCNT_dec(PL_subname);
995 SvREFCNT_dec(PL_linestr);
997 #ifdef PERL_USES_PL_PIDSTATUS
998 SvREFCNT_dec(PL_pidstatus);
1001 SvREFCNT_dec(PL_toptarget);
1002 PL_toptarget = NULL;
1003 SvREFCNT_dec(PL_bodytarget);
1004 PL_bodytarget = NULL;
1005 PL_formtarget = NULL;
1007 /* free locale stuff */
1008 #ifdef USE_LOCALE_COLLATE
1009 Safefree(PL_collation_name);
1010 PL_collation_name = NULL;
1013 #ifdef USE_LOCALE_NUMERIC
1014 Safefree(PL_numeric_name);
1015 PL_numeric_name = NULL;
1016 SvREFCNT_dec(PL_numeric_radix_sv);
1017 PL_numeric_radix_sv = NULL;
1020 /* clear utf8 character classes */
1021 SvREFCNT_dec(PL_utf8_alnum);
1022 SvREFCNT_dec(PL_utf8_alnumc);
1023 SvREFCNT_dec(PL_utf8_ascii);
1024 SvREFCNT_dec(PL_utf8_alpha);
1025 SvREFCNT_dec(PL_utf8_space);
1026 SvREFCNT_dec(PL_utf8_cntrl);
1027 SvREFCNT_dec(PL_utf8_graph);
1028 SvREFCNT_dec(PL_utf8_digit);
1029 SvREFCNT_dec(PL_utf8_upper);
1030 SvREFCNT_dec(PL_utf8_lower);
1031 SvREFCNT_dec(PL_utf8_print);
1032 SvREFCNT_dec(PL_utf8_punct);
1033 SvREFCNT_dec(PL_utf8_xdigit);
1034 SvREFCNT_dec(PL_utf8_mark);
1035 SvREFCNT_dec(PL_utf8_toupper);
1036 SvREFCNT_dec(PL_utf8_totitle);
1037 SvREFCNT_dec(PL_utf8_tolower);
1038 SvREFCNT_dec(PL_utf8_tofold);
1039 SvREFCNT_dec(PL_utf8_idstart);
1040 SvREFCNT_dec(PL_utf8_idcont);
1041 PL_utf8_alnum = NULL;
1042 PL_utf8_alnumc = NULL;
1043 PL_utf8_ascii = NULL;
1044 PL_utf8_alpha = NULL;
1045 PL_utf8_space = NULL;
1046 PL_utf8_cntrl = NULL;
1047 PL_utf8_graph = NULL;
1048 PL_utf8_digit = NULL;
1049 PL_utf8_upper = NULL;
1050 PL_utf8_lower = NULL;
1051 PL_utf8_print = NULL;
1052 PL_utf8_punct = NULL;
1053 PL_utf8_xdigit = NULL;
1054 PL_utf8_mark = NULL;
1055 PL_utf8_toupper = NULL;
1056 PL_utf8_totitle = NULL;
1057 PL_utf8_tolower = NULL;
1058 PL_utf8_tofold = NULL;
1059 PL_utf8_idstart = NULL;
1060 PL_utf8_idcont = NULL;
1062 if (!specialWARN(PL_compiling.cop_warnings))
1063 PerlMemShared_free(PL_compiling.cop_warnings);
1064 PL_compiling.cop_warnings = NULL;
1065 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1066 PL_compiling.cop_hints_hash = NULL;
1067 CopFILE_free(&PL_compiling);
1068 CopSTASH_free(&PL_compiling);
1070 /* Prepare to destruct main symbol table. */
1075 SvREFCNT_dec(PL_curstname);
1076 PL_curstname = NULL;
1078 /* clear queued errors */
1079 SvREFCNT_dec(PL_errors);
1083 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1084 if (PL_scopestack_ix != 0)
1085 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1086 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1087 (long)PL_scopestack_ix);
1088 if (PL_savestack_ix != 0)
1089 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1090 "Unbalanced saves: %ld more saves than restores\n",
1091 (long)PL_savestack_ix);
1092 if (PL_tmps_floor != -1)
1093 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1094 (long)PL_tmps_floor + 1);
1095 if (cxstack_ix != -1)
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1097 (long)cxstack_ix + 1);
1100 /* Now absolutely destruct everything, somehow or other, loops or no. */
1101 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1102 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1104 /* the 2 is for PL_fdpid and PL_strtab */
1105 while (PL_sv_count > 2 && sv_clean_all())
1108 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1109 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1110 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1111 SvFLAGS(PL_strtab) |= SVt_PVHV;
1113 AvREAL_off(PL_fdpid); /* no surviving entries */
1114 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1117 #ifdef HAVE_INTERP_INTERN
1121 /* Destruct the global string table. */
1123 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1124 * so that sv_free() won't fail on them.
1125 * Now that the global string table is using a single hunk of memory
1126 * for both HE and HEK, we either need to explicitly unshare it the
1127 * correct way, or actually free things here.
1130 const I32 max = HvMAX(PL_strtab);
1131 HE * const * const array = HvARRAY(PL_strtab);
1132 HE *hent = array[0];
1135 if (hent && ckWARN_d(WARN_INTERNAL)) {
1136 HE * const next = HeNEXT(hent);
1137 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1138 "Unbalanced string table refcount: (%ld) for \"%s\"",
1139 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1146 hent = array[riter];
1151 HvARRAY(PL_strtab) = 0;
1152 HvTOTALKEYS(PL_strtab) = 0;
1153 HvFILL(PL_strtab) = 0;
1155 SvREFCNT_dec(PL_strtab);
1158 /* free the pointer tables used for cloning */
1159 ptr_table_free(PL_ptr_table);
1160 PL_ptr_table = (PTR_TBL_t*)NULL;
1163 /* free special SVs */
1165 SvREFCNT(&PL_sv_yes) = 0;
1166 sv_clear(&PL_sv_yes);
1167 SvANY(&PL_sv_yes) = NULL;
1168 SvFLAGS(&PL_sv_yes) = 0;
1170 SvREFCNT(&PL_sv_no) = 0;
1171 sv_clear(&PL_sv_no);
1172 SvANY(&PL_sv_no) = NULL;
1173 SvFLAGS(&PL_sv_no) = 0;
1177 for (i=0; i<=2; i++) {
1178 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1179 sv_clear(PERL_DEBUG_PAD(i));
1180 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1181 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1185 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1186 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1188 #ifdef DEBUG_LEAKING_SCALARS
1189 if (PL_sv_count != 0) {
1194 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1195 svend = &sva[SvREFCNT(sva)];
1196 for (sv = sva + 1; sv < svend; ++sv) {
1197 if (SvTYPE(sv) != SVTYPEMASK) {
1198 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1200 " refcnt=%"UVuf pTHX__FORMAT "\n"
1201 "\tallocated at %s:%d %s %s%s\n",
1202 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1203 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1205 sv->sv_debug_inpad ? "for" : "by",
1206 sv->sv_debug_optype ?
1207 PL_op_name[sv->sv_debug_optype]: "(none)",
1208 sv->sv_debug_cloned ? " (cloned)" : ""
1210 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1211 Perl_dump_sv_child(aTHX_ sv);
1217 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1221 /* Wait for up to 4 seconds for child to terminate.
1222 This seems to be the least effort way of timing out on reaping
1224 struct timeval waitfor = {4, 0};
1225 int sock = PL_dumper_fd;
1229 FD_SET(sock, &rset);
1230 select(sock + 1, &rset, NULL, NULL, &waitfor);
1231 waitpid(child, &status, WNOHANG);
1238 #ifdef PERL_DEBUG_READONLY_OPS
1244 #if defined(PERLIO_LAYERS)
1245 /* No more IO - including error messages ! */
1246 PerlIO_cleanup(aTHX);
1249 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1250 as currently layers use it rather than NULL as a marker
1251 for no arg - and will try and SvREFCNT_dec it.
1253 SvREFCNT(&PL_sv_undef) = 0;
1254 SvREADONLY_off(&PL_sv_undef);
1256 Safefree(PL_origfilename);
1257 PL_origfilename = NULL;
1258 Safefree(PL_reg_start_tmp);
1259 PL_reg_start_tmp = (char**)NULL;
1260 PL_reg_start_tmpl = 0;
1261 Safefree(PL_reg_curpm);
1262 Safefree(PL_reg_poscache);
1263 free_tied_hv_pool();
1264 Safefree(PL_op_mask);
1265 Safefree(PL_psig_ptr);
1266 PL_psig_ptr = (SV**)NULL;
1267 Safefree(PL_psig_name);
1268 PL_psig_name = (SV**)NULL;
1269 Safefree(PL_bitcount);
1271 Safefree(PL_psig_pend);
1272 PL_psig_pend = (int*)NULL;
1275 PL_tainting = FALSE;
1276 PL_taint_warn = FALSE;
1277 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1280 DEBUG_P(debprofdump());
1282 #ifdef USE_REENTRANT_API
1283 Perl_reentrant_free(aTHX);
1288 while (PL_regmatch_slab) {
1289 regmatch_slab *s = PL_regmatch_slab;
1290 PL_regmatch_slab = PL_regmatch_slab->next;
1294 /* As the absolutely last thing, free the non-arena SV for mess() */
1297 /* we know that type == SVt_PVMG */
1299 /* it could have accumulated taint magic */
1302 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1303 moremagic = mg->mg_moremagic;
1304 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1306 Safefree(mg->mg_ptr);
1310 /* we know that type >= SVt_PV */
1311 SvPV_free(PL_mess_sv);
1312 Safefree(SvANY(PL_mess_sv));
1313 Safefree(PL_mess_sv);
1320 =for apidoc perl_free
1322 Releases a Perl interpreter. See L<perlembed>.
1332 if (PL_veto_cleanup)
1335 #ifdef PERL_TRACK_MEMPOOL
1338 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1339 * value as we're probably hunting memory leaks then
1341 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1342 if (!s || atoi(s) == 0) {
1343 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1344 thread at thread exit. */
1345 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1346 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1351 #if defined(WIN32) || defined(NETWARE)
1352 # if defined(PERL_IMPLICIT_SYS)
1355 void *host = nw_internal_host;
1357 void *host = w32_internal_host;
1359 PerlMem_free(aTHXx);
1361 nw_delete_internal_host(host);
1363 win32_delete_internal_host(host);
1367 PerlMem_free(aTHXx);
1370 PerlMem_free(aTHXx);
1374 #if defined(USE_ITHREADS)
1375 /* provide destructors to clean up the thread key when libperl is unloaded */
1376 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1378 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1379 #pragma fini "perl_fini"
1380 #elif defined(__sun) && !defined(__GNUC__)
1381 #pragma fini (perl_fini)
1385 #if defined(__GNUC__)
1386 __attribute__((destructor))
1391 if (PL_curinterp && !PL_veto_cleanup)
1396 #endif /* THREADS */
1399 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1402 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1403 PL_exitlist[PL_exitlistlen].fn = fn;
1404 PL_exitlist[PL_exitlistlen].ptr = ptr;
1408 #ifdef HAS_PROCSELFEXE
1409 /* This is a function so that we don't hold on to MAXPATHLEN
1410 bytes of stack longer than necessary
1413 S_procself_val(pTHX_ SV *sv, const char *arg0)
1415 char buf[MAXPATHLEN];
1416 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1418 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1419 includes a spurious NUL which will cause $^X to fail in system
1420 or backticks (this will prevent extensions from being built and
1421 many tests from working). readlink is not meant to add a NUL.
1422 Normal readlink works fine.
1424 if (len > 0 && buf[len-1] == '\0') {
1428 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1429 returning the text "unknown" from the readlink rather than the path
1430 to the executable (or returning an error from the readlink). Any valid
1431 path has a '/' in it somewhere, so use that to validate the result.
1432 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1434 if (len > 0 && memchr(buf, '/', len)) {
1435 sv_setpvn(sv,buf,len);
1441 #endif /* HAS_PROCSELFEXE */
1444 S_set_caret_X(pTHX) {
1446 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1448 #ifdef HAS_PROCSELFEXE
1449 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1452 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1454 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1461 =for apidoc perl_parse
1463 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1469 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1476 PERL_UNUSED_ARG(my_perl);
1478 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1481 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1482 setuid perl scripts securely.\n");
1483 #endif /* IAMSUID */
1486 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1487 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1488 * This MUST be done before any hash stores or fetches take place.
1489 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1490 * yourself, it is your responsibility to provide a good random seed!
1491 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1492 if (!PL_rehash_seed_set)
1493 PL_rehash_seed = get_hash_seed();
1495 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1497 if (s && (atoi(s) == 1))
1498 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1500 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1505 if (PL_origalen != 0) {
1506 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1509 /* Set PL_origalen be the sum of the contiguous argv[]
1510 * elements plus the size of the env in case that it is
1511 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1512 * as the maximum modifiable length of $0. In the worst case
1513 * the area we are able to modify is limited to the size of
1514 * the original argv[0]. (See below for 'contiguous', though.)
1516 const char *s = NULL;
1519 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1520 /* Do the mask check only if the args seem like aligned. */
1522 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1524 /* See if all the arguments are contiguous in memory. Note
1525 * that 'contiguous' is a loose term because some platforms
1526 * align the argv[] and the envp[]. If the arguments look
1527 * like non-aligned, assume that they are 'strictly' or
1528 * 'traditionally' contiguous. If the arguments look like
1529 * aligned, we just check that they are within aligned
1530 * PTRSIZE bytes. As long as no system has something bizarre
1531 * like the argv[] interleaved with some other data, we are
1532 * fine. (Did I just evoke Murphy's Law?) --jhi */
1533 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1535 for (i = 1; i < PL_origargc; i++) {
1536 if ((PL_origargv[i] == s + 1
1538 || PL_origargv[i] == s + 2
1543 (PL_origargv[i] > s &&
1545 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1556 #ifndef PERL_USE_SAFE_PUTENV
1557 /* Can we grab env area too to be used as the area for $0? */
1558 if (s && PL_origenviron && !PL_use_safe_putenv) {
1559 if ((PL_origenviron[0] == s + 1)
1562 (PL_origenviron[0] > s &&
1563 PL_origenviron[0] <=
1564 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1567 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1568 s = PL_origenviron[0];
1571 my_setenv("NoNe SuCh", NULL);
1572 /* Force copy of environment. */
1573 for (i = 1; PL_origenviron[i]; i++) {
1574 if (PL_origenviron[i] == s + 1
1577 (PL_origenviron[i] > s &&
1578 PL_origenviron[i] <=
1579 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1582 s = PL_origenviron[i];
1590 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1592 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1597 /* Come here if running an undumped a.out. */
1599 PL_origfilename = savepv(argv[0]);
1600 PL_do_undump = FALSE;
1601 cxstack_ix = -1; /* start label stack again */
1603 assert (!PL_tainted);
1605 S_set_caret_X(aTHX);
1607 init_postdump_symbols(argc,argv,env);
1612 op_free(PL_main_root);
1613 PL_main_root = NULL;
1615 PL_main_start = NULL;
1616 SvREFCNT_dec(PL_main_cv);
1620 oldscope = PL_scopestack_ix;
1621 PL_dowarn = G_WARN_OFF;
1626 parse_body(env,xsinit);
1628 call_list(oldscope, PL_unitcheckav);
1630 call_list(oldscope, PL_checkav);
1637 /* my_exit() was called */
1638 while (PL_scopestack_ix > oldscope)
1641 PL_curstash = PL_defstash;
1643 call_list(oldscope, PL_unitcheckav);
1645 call_list(oldscope, PL_checkav);
1649 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1658 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1662 int argc = PL_origargc;
1663 char **argv = PL_origargv;
1664 const char *scriptname = NULL;
1665 VOL bool dosearch = FALSE;
1666 const char *validarg = "";
1668 register char *s, c;
1669 const char *cddir = NULL;
1670 #ifdef USE_SITECUSTOMIZE
1671 bool minus_f = FALSE;
1673 SV *linestr_sv = newSV_type(SVt_PVIV);
1675 SvGROW(linestr_sv, 80);
1676 sv_setpvn(linestr_sv,"",0);
1678 sv = newSVpvs(""); /* first used for -I flags */
1682 for (argc--,argv++; argc > 0; argc--,argv++) {
1683 if (argv[0][0] != '-' || !argv[0][1])
1687 validarg = " PHOOEY ";
1691 * Can we rely on the kernel to start scripts with argv[1] set to
1692 * contain all #! line switches (the whole line)? (argv[0] is set to
1693 * the interpreter name, argv[2] to the script name; argv[3] and
1694 * above may contain other arguments.)
1701 #ifndef PERL_STRICT_CR
1726 if ((s = moreswitches(s)))
1731 CHECK_MALLOC_TOO_LATE_FOR('t');
1732 if( !PL_tainting ) {
1733 PL_taint_warn = TRUE;
1739 CHECK_MALLOC_TOO_LATE_FOR('T');
1741 PL_taint_warn = FALSE;
1749 #ifdef MACOS_TRADITIONAL
1750 /* ignore -e for Dev:Pseudo argument */
1751 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1754 forbid_setid('e', -1);
1756 PL_e_script = newSVpvs("");
1757 filter_add(read_e_script, NULL);
1760 sv_catpv(PL_e_script, s);
1762 sv_catpv(PL_e_script, argv[1]);
1766 Perl_croak(aTHX_ "No code specified for -%c", c);
1767 sv_catpvs(PL_e_script, "\n");
1771 #ifdef USE_SITECUSTOMIZE
1777 case 'I': /* -I handled both here and in moreswitches() */
1778 forbid_setid('I', -1);
1779 if (!*++s && (s=argv[1]) != NULL) {
1783 STRLEN len = strlen(s);
1784 const char * const p = savepvn(s, len);
1785 incpush(p, TRUE, TRUE, FALSE, FALSE);
1786 sv_catpvs(sv, "-I");
1787 sv_catpvn(sv, p, len);
1792 Perl_croak(aTHX_ "No directory specified for -I");
1795 forbid_setid('P', -1);
1796 PL_preprocess = TRUE;
1800 forbid_setid('S', -1);
1808 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1812 opts_prog = newSVpvs("print Config::myconfig(),");
1814 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1816 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1818 opts = SvCUR(opts_prog);
1820 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1824 # ifdef DEBUG_LEAKING_SCALARS
1825 " DEBUG_LEAKING_SCALARS"
1827 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1828 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1830 # ifdef FAKE_THREADS
1833 # ifdef MULTIPLICITY
1842 # ifdef PERL_DEBUG_READONLY_OPS
1843 " PERL_DEBUG_READONLY_OPS"
1845 # ifdef PERL_DONT_CREATE_GVSV
1846 " PERL_DONT_CREATE_GVSV"
1848 # ifdef PERL_GLOBAL_STRUCT
1849 " PERL_GLOBAL_STRUCT"
1851 # ifdef PERL_IMPLICIT_CONTEXT
1852 " PERL_IMPLICIT_CONTEXT"
1854 # ifdef PERL_IMPLICIT_SYS
1855 " PERL_IMPLICIT_SYS"
1860 # ifdef PERL_MALLOC_WRAP
1863 # ifdef PERL_MEM_LOG
1866 # ifdef PERL_MEM_LOG_ENV
1869 # ifdef PERL_MEM_LOG_ENV_FD
1870 " PERL_MEM_LOG_ENV_FD"
1872 # ifdef PERL_MEM_LOG_STDERR
1873 " PERL_MEM_LOG_STDERR"
1875 # ifdef PERL_MEM_LOG_TIMESTAMP
1876 " PERL_MEM_LOG_TIMESTAMP"
1878 # ifdef PERL_NEED_APPCTX
1881 # ifdef PERL_NEED_TIMESBASE
1882 " PERL_NEED_TIMESBASE"
1884 # ifdef PERL_OLD_COPY_ON_WRITE
1885 " PERL_OLD_COPY_ON_WRITE"
1890 # ifdef PERL_TRACK_MEMPOOL
1891 " PERL_TRACK_MEMPOOL"
1893 # ifdef PERL_USE_SAFE_PUTENV
1894 " PERL_USE_SAFE_PUTENV"
1896 # ifdef PERL_USES_PL_PIDSTATUS
1897 " PERL_USES_PL_PIDSTATUS"
1899 # ifdef PL_OP_SLAB_ALLOC
1902 # ifdef THREADS_HAVE_PIDS
1903 " THREADS_HAVE_PIDS"
1905 # ifdef USE_64_BIT_ALL
1908 # ifdef USE_64_BIT_INT
1911 # ifdef USE_ITHREADS
1914 # ifdef USE_LARGE_FILES
1917 # ifdef USE_LONG_DOUBLE
1923 # ifdef USE_REENTRANT_API
1924 " USE_REENTRANT_API"
1929 # ifdef USE_SITECUSTOMIZE
1930 " USE_SITECUSTOMIZE"
1937 while (SvCUR(opts_prog) > opts+76) {
1938 /* find last space after "options: " and before col 76
1942 char * const pv = SvPV_nolen(opts_prog);
1943 const char c = pv[opts+76];
1945 space = strrchr(pv+opts+26, ' ');
1947 if (!space) break; /* "Can't happen" */
1949 /* break the line before that space */
1952 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1953 STR_WITH_LEN("\\n "));
1956 sv_catpvs(opts_prog,"\\n\",");
1958 #if defined(LOCAL_PATCH_COUNT)
1959 if (LOCAL_PATCH_COUNT > 0) {
1961 sv_catpvs(opts_prog,
1962 "\" Locally applied patches:\\n\",");
1963 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1964 if (PL_localpatches[i])
1965 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1966 0, PL_localpatches[i], 0);
1970 Perl_sv_catpvf(aTHX_ opts_prog,
1971 "\" Built under %s\\n\"",OSNAME);
1974 Perl_sv_catpvf(aTHX_ opts_prog,
1975 ",\" Compiled at %s %s\\n\"",__DATE__,
1978 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1982 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1983 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1984 "sort grep {/^PERL/} keys %ENV; ");
1986 sv_catpvs(opts_prog,
1987 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1989 sv_catpvs(opts_prog,
1990 "print \" \\%ENV:\\n @env\\n\" if @env;"
1991 "print \" \\@INC:\\n @INC\\n\";");
1995 opts_prog = Perl_newSVpvf(aTHX_
1996 "Config::config_vars(qw%c%s%c)",
2000 av_push(PL_preambleav, opts_prog);
2001 /* don't look for script or read stdin */
2002 scriptname = BIT_BUCKET;
2006 PL_doextract = TRUE;
2014 if (!*++s || isSPACE(*s)) {
2018 /* catch use of gnu style long options */
2019 if (strEQ(s, "version")) {
2023 if (strEQ(s, "help")) {
2030 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2036 #ifndef SECURE_INTERNAL_GETENV
2039 (s = PerlEnv_getenv("PERL5OPT")))
2041 const char *popt = s;
2044 if (*s == '-' && *(s+1) == 'T') {
2045 CHECK_MALLOC_TOO_LATE_FOR('T');
2047 PL_taint_warn = FALSE;
2050 char *popt_copy = NULL;
2063 if (!strchr("CDIMUdmtwA", *s))
2064 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2068 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2069 s = popt_copy + (s - popt);
2070 d = popt_copy + (d - popt);
2077 if( !PL_tainting ) {
2078 PL_taint_warn = TRUE;
2088 #ifdef USE_SITECUSTOMIZE
2090 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2091 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2096 scriptname = argv[0];
2099 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2101 else if (scriptname == NULL) {
2103 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2109 /* Set $^X early so that it can be used for relocatable paths in @INC */
2110 assert (!PL_tainted);
2112 S_set_caret_X(aTHX);
2119 = open_script(scriptname, dosearch, sv, &suidscript);
2121 validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv);
2124 # if defined(SIGCHLD) || defined(SIGCLD)
2127 # define SIGCHLD SIGCLD
2129 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2130 if (sigstate == (Sighandler_t) SIG_IGN) {
2131 if (ckWARN(WARN_SIGNAL))
2132 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2133 "Can't ignore signal CHLD, forcing to default");
2134 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2141 #ifdef MACOS_TRADITIONAL
2142 || gMacPerl_AlwaysExtract
2146 /* This will croak if suidscript is >= 0, as -x cannot be used with
2148 forbid_setid('x', suidscript);
2149 /* Hence you can't get here if suidscript >= 0 */
2151 find_beginning(linestr_sv);
2152 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2153 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2157 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2158 CvUNIQUE_on(PL_compcv);
2160 CvPADLIST(PL_compcv) = pad_new(0);
2163 boot_core_UNIVERSAL();
2164 boot_core_xsutils();
2168 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2170 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2176 # ifdef HAS_SOCKS5_INIT
2177 socks5_init(argv[0]);
2183 init_predump_symbols();
2184 /* init_postdump_symbols not currently designed to be called */
2185 /* more than once (ENV isn't cleared first, for example) */
2186 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2188 init_postdump_symbols(argc,argv,env);
2190 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2191 * or explicitly in some platforms.
2192 * locale.c:Perl_init_i18nl10n() if the environment
2193 * look like the user wants to use UTF-8. */
2194 #if defined(__SYMBIAN32__)
2195 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2198 /* Requires init_predump_symbols(). */
2199 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2204 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2205 * and the default open disciplines. */
2206 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2207 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2211 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2213 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2214 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2215 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2217 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2218 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2219 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2221 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2222 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2225 sv_setpvn(sv, ":utf8\0:utf8", 11);
2227 sv_setpvn(sv, ":utf8\0", 6);
2230 sv_setpvn(sv, "\0:utf8", 6);
2236 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2237 if (strEQ(s, "unsafe"))
2238 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2239 else if (strEQ(s, "safe"))
2240 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2242 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2246 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2250 PL_xmlfp = PerlIO_stdout();
2252 PL_xmlfp = PerlIO_open(s, "w");
2254 Perl_croak(aTHX_ "Can't open %s", s);
2256 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2258 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2259 PL_madskills = atoi(s);
2260 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2266 lex_start(linestr_sv);
2268 PL_subname = newSVpvs("main");
2270 /* now parse the script */
2272 SETERRNO(0,SS_NORMAL);
2274 #ifdef MACOS_TRADITIONAL
2275 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2277 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2279 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2280 MacPerl_MPWFileName(PL_origfilename));
2284 if (yyparse() || PL_error_count) {
2286 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2288 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2293 CopLINE_set(PL_curcop, 0);
2294 PL_curstash = PL_defstash;
2295 PL_preprocess = FALSE;
2297 SvREFCNT_dec(PL_e_script);
2305 SAVECOPFILE(PL_curcop);
2306 SAVECOPLINE(PL_curcop);
2307 gv_check(PL_defstash);
2314 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2315 dump_mstats("after compilation:");
2324 =for apidoc perl_run
2326 Tells a Perl interpreter to run. See L<perlembed>.
2339 PERL_UNUSED_ARG(my_perl);
2341 oldscope = PL_scopestack_ix;
2349 cxstack_ix = -1; /* start context stack again */
2351 case 0: /* normal completion */
2355 case 2: /* my_exit() */
2356 while (PL_scopestack_ix > oldscope)
2359 PL_curstash = PL_defstash;
2360 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2361 PL_endav && !PL_minus_c)
2362 call_list(oldscope, PL_endav);
2364 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2365 dump_mstats("after execution: ");
2371 POPSTACK_TO(PL_mainstack);
2374 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2385 S_run_body(pTHX_ I32 oldscope)
2388 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2389 PL_sawampersand ? "Enabling" : "Omitting"));
2391 if (!PL_restartop) {
2395 exit(0); /* less likely to core dump than my_exit(0) */
2398 DEBUG_x(dump_all());
2401 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2403 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2407 #ifdef MACOS_TRADITIONAL
2408 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2409 (gMacPerl_ErrorFormat ? "# " : ""),
2410 MacPerl_MPWFileName(PL_origfilename));
2412 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2416 if (PERLDB_SINGLE && PL_DBsingle)
2417 sv_setiv(PL_DBsingle, 1);
2419 call_list(oldscope, PL_initav);
2420 #ifdef PERL_DEBUG_READONLY_OPS
2421 Perl_pending_Slabs_to_ro(aTHX);
2428 PL_op = PL_restartop;
2432 else if (PL_main_start) {
2433 CvDEPTH(PL_main_cv) = 1;
2434 PL_op = PL_main_start;
2442 =head1 SV Manipulation Functions
2444 =for apidoc p||get_sv
2446 Returns the SV of the specified Perl scalar. If C<create> is set and the
2447 Perl variable does not exist then it will be created. If C<create> is not
2448 set and the variable does not exist then NULL is returned.
2454 Perl_get_sv(pTHX_ const char *name, I32 create)
2457 gv = gv_fetchpv(name, create, SVt_PV);
2464 =head1 Array Manipulation Functions
2466 =for apidoc p||get_av
2468 Returns the AV of the specified Perl array. If C<create> is set and the
2469 Perl variable does not exist then it will be created. If C<create> is not
2470 set and the variable does not exist then NULL is returned.
2476 Perl_get_av(pTHX_ const char *name, I32 create)
2478 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2487 =head1 Hash Manipulation Functions
2489 =for apidoc p||get_hv
2491 Returns the HV of the specified Perl hash. If C<create> is set and the
2492 Perl variable does not exist then it will be created. If C<create> is not
2493 set and the variable does not exist then NULL is returned.
2499 Perl_get_hv(pTHX_ const char *name, I32 create)
2501 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2510 =head1 CV Manipulation Functions
2512 =for apidoc p||get_cvn_flags
2514 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2515 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2516 exist then it will be declared (which has the same effect as saying
2517 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2518 then NULL is returned.
2520 =for apidoc p||get_cv
2522 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2528 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2530 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2531 /* XXX this is probably not what they think they're getting.
2532 * It has the same effect as "sub name;", i.e. just a forward
2534 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2535 SV *const sv = newSVpvn(name,len);
2536 SvFLAGS(sv) |= flags & SVf_UTF8;
2537 return newSUB(start_subparse(FALSE, 0),
2538 newSVOP(OP_CONST, 0, sv),
2547 Perl_get_cv(pTHX_ const char *name, I32 flags)
2549 return get_cvn_flags(name, strlen(name), flags);
2552 /* Be sure to refetch the stack pointer after calling these routines. */
2556 =head1 Callback Functions
2558 =for apidoc p||call_argv
2560 Performs a callback to the specified Perl sub. See L<perlcall>.
2566 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2568 /* See G_* flags in cop.h */
2569 /* null terminated arg list */
2577 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2582 return call_pv(sub_name, flags);
2586 =for apidoc p||call_pv
2588 Performs a callback to the specified Perl sub. See L<perlcall>.
2594 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2595 /* name of the subroutine */
2596 /* See G_* flags in cop.h */
2598 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2602 =for apidoc p||call_method
2604 Performs a callback to the specified Perl method. The blessed object must
2605 be on the stack. See L<perlcall>.
2611 Perl_call_method(pTHX_ const char *methname, I32 flags)
2612 /* name of the subroutine */
2613 /* See G_* flags in cop.h */
2615 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2618 /* May be called with any of a CV, a GV, or an SV containing the name. */
2620 =for apidoc p||call_sv
2622 Performs a callback to the Perl sub whose name is in the SV. See
2629 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2630 /* See G_* flags in cop.h */
2633 LOGOP myop; /* fake syntax tree node */
2638 bool oldcatch = CATCH_GET;
2640 OP* const oldop = PL_op;
2643 if (flags & G_DISCARD) {
2648 Zero(&myop, 1, LOGOP);
2649 myop.op_next = NULL;
2650 if (!(flags & G_NOARGS))
2651 myop.op_flags |= OPf_STACKED;
2652 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2653 (flags & G_ARRAY) ? OPf_WANT_LIST :
2658 EXTEND(PL_stack_sp, 1);
2659 *++PL_stack_sp = sv;
2661 oldscope = PL_scopestack_ix;
2663 if (PERLDB_SUB && PL_curstash != PL_debstash
2664 /* Handle first BEGIN of -d. */
2665 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2666 /* Try harder, since this may have been a sighandler, thus
2667 * curstash may be meaningless. */
2668 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2669 && !(flags & G_NODEBUG))
2670 PL_op->op_private |= OPpENTERSUB_DB;
2672 if (flags & G_METHOD) {
2673 Zero(&method_op, 1, UNOP);
2674 method_op.op_next = PL_op;
2675 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2676 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2677 PL_op = (OP*)&method_op;
2680 if (!(flags & G_EVAL)) {
2682 CALL_BODY_SUB((OP*)&myop);
2683 retval = PL_stack_sp - (PL_stack_base + oldmark);
2684 CATCH_SET(oldcatch);
2687 myop.op_other = (OP*)&myop;
2689 create_eval_scope(flags|G_FAKINGEVAL);
2697 CALL_BODY_SUB((OP*)&myop);
2698 retval = PL_stack_sp - (PL_stack_base + oldmark);
2699 if (!(flags & G_KEEPERR))
2700 sv_setpvn(ERRSV,"",0);
2706 /* my_exit() was called */
2707 PL_curstash = PL_defstash;
2710 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2711 Perl_croak(aTHX_ "Callback called exit");
2716 PL_op = PL_restartop;
2720 PL_stack_sp = PL_stack_base + oldmark;
2721 if (flags & G_ARRAY)
2725 *++PL_stack_sp = &PL_sv_undef;
2730 if (PL_scopestack_ix > oldscope)
2731 delete_eval_scope();
2735 if (flags & G_DISCARD) {
2736 PL_stack_sp = PL_stack_base + oldmark;
2745 /* Eval a string. The G_EVAL flag is always assumed. */
2748 =for apidoc p||eval_sv
2750 Tells Perl to C<eval> the string in the SV.
2756 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2758 /* See G_* flags in cop.h */
2762 UNOP myop; /* fake syntax tree node */
2763 VOL I32 oldmark = SP - PL_stack_base;
2766 OP* const oldop = PL_op;
2769 if (flags & G_DISCARD) {
2776 Zero(PL_op, 1, UNOP);
2777 EXTEND(PL_stack_sp, 1);
2778 *++PL_stack_sp = sv;
2780 if (!(flags & G_NOARGS))
2781 myop.op_flags = OPf_STACKED;
2782 myop.op_next = NULL;
2783 myop.op_type = OP_ENTEREVAL;
2784 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2785 (flags & G_ARRAY) ? OPf_WANT_LIST :
2787 if (flags & G_KEEPERR)
2788 myop.op_flags |= OPf_SPECIAL;
2790 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2791 * before a PUSHEVAL, which corrupts the stack after a croak */
2792 TAINT_PROPER("eval_sv()");
2798 CALL_BODY_EVAL((OP*)&myop);
2799 retval = PL_stack_sp - (PL_stack_base + oldmark);
2800 if (!(flags & G_KEEPERR))
2801 sv_setpvn(ERRSV,"",0);
2807 /* my_exit() was called */
2808 PL_curstash = PL_defstash;
2811 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2812 Perl_croak(aTHX_ "Callback called exit");
2817 PL_op = PL_restartop;
2821 PL_stack_sp = PL_stack_base + oldmark;
2822 if (flags & G_ARRAY)
2826 *++PL_stack_sp = &PL_sv_undef;
2832 if (flags & G_DISCARD) {
2833 PL_stack_sp = PL_stack_base + oldmark;
2843 =for apidoc p||eval_pv
2845 Tells Perl to C<eval> the given string and return an SV* result.
2851 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2855 SV* sv = newSVpv(p, 0);
2857 eval_sv(sv, G_SCALAR);
2864 if (croak_on_error && SvTRUE(ERRSV)) {
2865 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2871 /* Require a module. */
2874 =head1 Embedding Functions
2876 =for apidoc p||require_pv
2878 Tells Perl to C<require> the file named by the string argument. It is
2879 analogous to the Perl code C<eval "require '$file'">. It's even
2880 implemented that way; consider using load_module instead.
2885 Perl_require_pv(pTHX_ const char *pv)
2890 PUSHSTACKi(PERLSI_REQUIRE);
2892 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2893 eval_sv(sv_2mortal(sv), G_DISCARD);
2899 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2901 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2904 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2908 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2910 /* This message really ought to be max 23 lines.
2911 * Removed -h because the user already knows that option. Others? */
2913 static const char * const usage_msg[] = {
2914 "-0[octal] specify record separator (\\0, if no argument)",
2915 "-A[mod][=pattern] activate all/given assertions",
2916 "-a autosplit mode with -n or -p (splits $_ into @F)",
2917 "-C[number/list] enables the listed Unicode features",
2918 "-c check syntax only (runs BEGIN and CHECK blocks)",
2919 "-d[:debugger] run program under debugger",
2920 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2921 "-e program one line of program (several -e's allowed, omit programfile)",
2922 "-E program like -e, but enables all optional features",
2923 "-f don't do $sitelib/sitecustomize.pl at startup",
2924 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2925 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2926 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2927 "-l[octal] enable line ending processing, specifies line terminator",
2928 "-[mM][-]module execute \"use/no module...\" before executing program",
2929 "-n assume \"while (<>) { ... }\" loop around program",
2930 "-p assume loop like -n but print line also, like sed",
2931 "-P run program through C preprocessor before compilation",
2932 "-s enable rudimentary parsing for switches after programfile",
2933 "-S look for programfile using PATH environment variable",
2934 "-t enable tainting warnings",
2935 "-T enable tainting checks",
2936 "-u dump core after parsing program",
2937 "-U allow unsafe operations",
2938 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2939 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2940 "-w enable many useful warnings (RECOMMENDED)",
2941 "-W enable all warnings",
2942 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2943 "-X disable all warnings",
2947 const char * const *p = usage_msg;
2949 PerlIO_printf(PerlIO_stdout(),
2950 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2953 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2956 /* convert a string of -D options (or digits) into an int.
2957 * sets *s to point to the char after the options */
2961 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2963 static const char * const usage_msgd[] = {
2964 " Debugging flag values: (see also -d)",
2965 " p Tokenizing and parsing (with v, displays parse stack)",
2966 " s Stack snapshots (with v, displays all stacks)",
2967 " l Context (loop) stack processing",
2968 " t Trace execution",
2969 " o Method and overloading resolution",
2970 " c String/numeric conversions",
2971 " P Print profiling info, preprocessor command for -P, source file input state",
2972 " m Memory allocation",
2973 " f Format processing",
2974 " r Regular expression parsing and execution",
2975 " x Syntax tree dump",
2976 " u Tainting checks",
2977 " H Hash dump -- usurps values()",
2978 " X Scratchpad allocation",
2980 " S Thread synchronization",
2982 " R Include reference counts of dumped variables (eg when using -Ds)",
2983 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2984 " v Verbose: use in conjunction with other flags",
2986 " A Consistency checks on internal structures",
2987 " q quiet - currently only suppresses the 'EXECUTING' message",
2992 /* if adding extra options, remember to update DEBUG_MASK */
2993 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2995 for (; isALNUM(**s); (*s)++) {
2996 const char * const d = strchr(debopts,**s);
2998 i |= 1 << (d - debopts);
2999 else if (ckWARN_d(WARN_DEBUGGING))
3000 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3001 "invalid option -D%c, use -D'' to see choices\n", **s);
3004 else if (isDIGIT(**s)) {
3006 for (; isALNUM(**s); (*s)++) ;
3008 else if (givehelp) {
3009 const char *const *p = usage_msgd;
3010 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3013 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3014 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3015 "-Dp not implemented on this platform\n");
3021 /* This routine handles any switches that can be given during run */
3024 Perl_moreswitches(pTHX_ char *s)
3035 SvREFCNT_dec(PL_rs);
3036 if (s[1] == 'x' && s[2]) {
3037 const char *e = s+=2;
3043 flags = PERL_SCAN_SILENT_ILLDIGIT;
3044 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3045 if (s + numlen < e) {
3046 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3050 PL_rs = newSVpvs("");
3051 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3052 tmps = (U8*)SvPVX(PL_rs);
3053 uvchr_to_utf8(tmps, rschar);
3054 SvCUR_set(PL_rs, UNISKIP(rschar));
3059 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3060 if (rschar & ~((U8)~0))
3061 PL_rs = &PL_sv_undef;
3062 else if (!rschar && numlen >= 2)
3063 PL_rs = newSVpvs("");
3065 char ch = (char)rschar;
3066 PL_rs = newSVpvn(&ch, 1);
3069 sv_setsv(get_sv("/", TRUE), PL_rs);
3074 PL_unicode = parse_unicode_opts( (const char **)&s );
3075 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3081 while (*s && !isSPACE(*s)) ++s;
3082 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3093 forbid_setid('d', -1);
3096 /* -dt indicates to the debugger that threads will be used */
3097 if (*s == 't' && !isALNUM(s[1])) {
3099 my_setenv("PERL5DB_THREADED", "1");
3102 /* The following permits -d:Mod to accepts arguments following an =
3103 in the fashion that -MSome::Mod does. */
3104 if (*s == ':' || *s == '=') {
3106 SV * const sv = newSVpvs("use Devel::");
3108 /* We now allow -d:Module=Foo,Bar */
3109 while(isALNUM(*s) || *s==':') ++s;
3111 sv_catpv(sv, start);
3113 sv_catpvn(sv, start, s-start);
3114 /* Don't use NUL as q// delimiter here, this string goes in the
3116 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3119 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3122 PL_perldb = PERLDB_ALL;
3129 forbid_setid('D', -1);
3131 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3132 #else /* !DEBUGGING */
3133 if (ckWARN_d(WARN_DEBUGGING))
3134 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3135 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3136 for (s++; isALNUM(*s); s++) ;
3141 usage(PL_origargv[0]);
3144 Safefree(PL_inplace);
3145 #if defined(__CYGWIN__) /* do backup extension automagically */
3146 if (*(s+1) == '\0') {
3147 PL_inplace = savepvs(".bak");
3150 #endif /* __CYGWIN__ */
3152 const char * const start = ++s;
3153 while (*s && !isSPACE(*s))
3156 PL_inplace = savepvn(start, s - start);
3160 if (*s == '-') /* Additional switches on #! line. */
3164 case 'I': /* -I handled both here and in parse_body() */
3165 forbid_setid('I', -1);
3167 while (*s && isSPACE(*s))
3172 /* ignore trailing spaces (possibly followed by other switches) */
3174 for (e = p; *e && !isSPACE(*e); e++) ;
3178 } while (*p && *p != '-');
3179 e = savepvn(s, e-s);
3180 incpush(e, TRUE, TRUE, FALSE, FALSE);
3187 Perl_croak(aTHX_ "No directory specified for -I");
3193 SvREFCNT_dec(PL_ors_sv);
3199 PL_ors_sv = newSVpvs("\n");
3200 numlen = 3 + (*s == '0');
3201 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3205 if (RsPARA(PL_rs)) {
3206 PL_ors_sv = newSVpvs("\n\n");
3209 PL_ors_sv = newSVsv(PL_rs);
3214 forbid_setid('A', -1);
3217 char * const start = s;
3218 SV * const sv = newSVpvs("use assertions::activate");
3219 while(isALNUM(*s) || *s == ':') ++s;
3221 sv_catpvs(sv, "::");
3222 sv_catpvn(sv, start, s-start);
3225 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3228 else if (*s != '\0') {
3229 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3231 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3235 forbid_setid('M', -1); /* XXX ? */
3238 forbid_setid('m', -1); /* XXX ? */
3242 const char *use = "use ";
3243 /* -M-foo == 'no foo' */
3244 /* Leading space on " no " is deliberate, to make both
3245 possibilities the same length. */
3246 if (*s == '-') { use = " no "; ++s; }
3247 sv = newSVpvn(use,4);
3249 /* We allow -M'Module qw(Foo Bar)' */
3250 while(isALNUM(*s) || *s==':') ++s;
3252 sv_catpv(sv, start);
3253 if (*(start-1) == 'm') {
3255 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3256 sv_catpvs( sv, " ()");
3260 Perl_croak(aTHX_ "Module name required with -%c option",
3262 sv_catpvn(sv, start, s-start);
3263 sv_catpvs(sv, " split(/,/,q");
3264 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3266 sv_catpvs(sv, "\0)");
3269 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3272 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3283 forbid_setid('s', -1);
3284 PL_doswitches = TRUE;
3298 #ifdef MACOS_TRADITIONAL
3299 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3301 PL_do_undump = TRUE;
3309 if (!sv_derived_from(PL_patchlevel, "version"))
3310 upg_version(PL_patchlevel, TRUE);
3312 PerlIO_printf(PerlIO_stdout(),
3313 Perl_form(aTHX_ "\nThis is perl, %"SVf
3314 #ifdef PERL_PATCHNUM
3315 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3318 SVfARG(vstringify(PL_patchlevel)),
3321 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3322 PerlIO_printf(PerlIO_stdout(),
3323 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3324 SVfARG(vstringify(PL_patchlevel))));
3325 PerlIO_printf(PerlIO_stdout(),
3326 Perl_form(aTHX_ " built under %s at %s %s\n",
3327 OSNAME, __DATE__, __TIME__));
3328 PerlIO_printf(PerlIO_stdout(),
3329 Perl_form(aTHX_ " OS Specific Release: %s\n",
3333 #if defined(LOCAL_PATCH_COUNT)
3334 if (LOCAL_PATCH_COUNT > 0)
3335 PerlIO_printf(PerlIO_stdout(),
3336 "\n(with %d registered patch%s, "
3337 "see perl -V for more detail)",
3339 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\n\nCopyright 1987-2007, Larry Wall\n");
3344 #ifdef MACOS_TRADITIONAL
3345 PerlIO_printf(PerlIO_stdout(),
3346 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3347 "maintained by Chris Nandor\n");
3350 PerlIO_printf(PerlIO_stdout(),
3351 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3356 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3359 PerlIO_printf(PerlIO_stdout(),
3360 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3361 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "atariST series port, ++jrb bammi@cadence.com\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3388 PerlIO_printf(PerlIO_stdout(),
3389 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3392 PerlIO_printf(PerlIO_stdout(),
3393 "MiNT port by Guido Flohr, 1997-1999\n");
3396 PerlIO_printf(PerlIO_stdout(),
3397 "EPOC port by Olaf Flebbe, 1999-2002\n");
3400 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3401 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3404 #ifdef __SYMBIAN32__
3405 PerlIO_printf(PerlIO_stdout(),
3406 "Symbian port by Nokia, 2004-2005\n");
3408 #ifdef BINARY_BUILD_NOTICE
3409 BINARY_BUILD_NOTICE;
3411 PerlIO_printf(PerlIO_stdout(),
3413 Perl may be copied only under the terms of either the Artistic License or the\n\
3414 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3415 Complete documentation for Perl, including FAQ lists, should be found on\n\
3416 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3417 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3420 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3421 PL_dowarn |= G_WARN_ON;
3426 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3427 if (!specialWARN(PL_compiling.cop_warnings))
3428 PerlMemShared_free(PL_compiling.cop_warnings);
3429 PL_compiling.cop_warnings = pWARN_ALL ;
3433 PL_dowarn = G_WARN_ALL_OFF;
3434 if (!specialWARN(PL_compiling.cop_warnings))
3435 PerlMemShared_free(PL_compiling.cop_warnings);
3436 PL_compiling.cop_warnings = pWARN_NONE ;
3441 if (s[1] == '-') /* Additional switches on #! line. */
3446 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3452 #ifdef ALTERNATE_SHEBANG
3453 case 'S': /* OS/2 needs -S on "extproc" line. */
3461 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3466 /* compliments of Tom Christiansen */
3468 /* unexec() can be found in the Gnu emacs distribution */
3469 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3472 Perl_my_unexec(pTHX)
3474 PERL_UNUSED_CONTEXT;
3476 SV * prog = newSVpv(BIN_EXP, 0);
3477 SV * file = newSVpv(PL_origfilename, 0);
3481 sv_catpvs(prog, "/perl");
3482 sv_catpvs(file, ".perldump");
3484 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3485 /* unexec prints msg to stderr in case of failure */
3486 PerlProc_exit(status);
3489 # include <lib$routines.h>
3490 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3491 # elif defined(WIN32) || defined(__CYGWIN__)
3492 Perl_croak(aTHX_ "dump is not supported");
3494 ABORT(); /* for use with undump */
3499 /* initialize curinterp */
3505 # define PERLVAR(var,type)
3506 # define PERLVARA(var,n,type)
3507 # if defined(PERL_IMPLICIT_CONTEXT)
3508 # define PERLVARI(var,type,init) aTHX->var = init;
3509 # define PERLVARIC(var,type,init) aTHX->var = init;
3511 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3512 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3514 # include "intrpvar.h"
3515 # include "thrdvar.h"
3521 # define PERLVAR(var,type)
3522 # define PERLVARA(var,n,type)
3523 # define PERLVARI(var,type,init) PL_##var = init;
3524 # define PERLVARIC(var,type,init) PL_##var = init;
3525 # include "intrpvar.h"
3526 # include "thrdvar.h"
3533 /* As these are inside a structure, PERLVARI isn't capable of initialising
3535 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3536 PL_reg_poscache = PL_reg_starttry = NULL;
3540 S_init_main_stash(pTHX)
3545 PL_curstash = PL_defstash = newHV();
3546 /* We know that the string "main" will be in the global shared string
3547 table, so it's a small saving to use it rather than allocate another
3549 PL_curstname = newSVpvs_share("main");
3550 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3551 /* If we hadn't caused another reference to "main" to be in the shared
3552 string table above, then it would be worth reordering these two,
3553 because otherwise all we do is delete "main" from it as a consequence
3554 of the SvREFCNT_dec, only to add it again with hv_name_set */
3555 SvREFCNT_dec(GvHV(gv));
3556 hv_name_set(PL_defstash, "main", 4, 0);
3557 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3559 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3561 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3562 GvMULTI_on(PL_incgv);
3563 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3564 GvMULTI_on(PL_hintgv);
3565 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3566 SvREFCNT_inc_simple_void(PL_defgv);
3567 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3568 SvREFCNT_inc_simple_void(PL_errgv);
3569 GvMULTI_on(PL_errgv);
3570 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3571 GvMULTI_on(PL_replgv);
3572 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3573 #ifdef PERL_DONT_CREATE_GVSV
3576 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3577 sv_setpvn(ERRSV, "", 0);
3578 PL_curstash = PL_defstash;
3579 CopSTASH_set(&PL_compiling, PL_defstash);
3580 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3581 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3583 /* We must init $/ before switches are processed. */
3584 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3588 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3594 const char *cpp_discard_flag;
3603 PL_origfilename = savepvs("-e");
3606 /* if find_script() returns, it returns a malloc()-ed value */
3607 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3609 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3610 const char *s = scriptname + 8;
3616 * Tell apart "normal" usage of fdscript, e.g.
3617 * with bash on FreeBSD:
3618 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3619 * from usage in suidperl.
3620 * Does any "normal" usage leave garbage after the number???
3621 * Is it a mistake to use a similar /dev/fd/ construct for
3626 * Be supersafe and do some sanity-checks.
3627 * Still, can we be sure we got the right thing?
3630 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3633 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3635 scriptname = savepv(s + 1);
3636 Safefree(PL_origfilename);
3637 PL_origfilename = (char *)scriptname;
3642 CopFILE_free(PL_curcop);
3643 CopFILE_set(PL_curcop, PL_origfilename);
3644 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3645 scriptname = (char *)"";
3646 if (fdscript >= 0) {
3647 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3648 # if defined(HAS_FCNTL) && defined(F_SETFD)
3650 /* ensure close-on-exec */
3651 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3656 Perl_croak(aTHX_ "sperl needs fd script\n"
3657 "You should not call sperl directly; do you need to "
3658 "change a #! line\nfrom sperl to perl?\n");
3661 * Do not open (or do other fancy stuff) while setuid.
3662 * Perl does the open, and hands script to suidperl on a fd;
3663 * suidperl only does some checks, sets up UIDs and re-execs
3664 * perl with that fd as it has always done.
3667 if (*suidscript != 1) {
3668 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3671 else if (PL_preprocess) {
3672 const char * const cpp_cfg = CPPSTDIN;
3673 SV * const cpp = newSVpvs("");
3674 SV * const cmd = newSV(0);
3676 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3677 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3678 if (strEQ(cpp_cfg, "cppstdin"))
3679 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3680 sv_catpv(cpp, cpp_cfg);
3683 sv_catpvs(sv, "-I");
3684 sv_catpv(sv,PRIVLIB_EXP);
3687 DEBUG_P(PerlIO_printf(Perl_debug_log,
3688 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3689 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3692 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3699 cpp_discard_flag = "";
3701 cpp_discard_flag = "-C";
3705 perl = os2_execname(aTHX);
3707 perl = PL_origargv[0];
3711 /* This strips off Perl comments which might interfere with
3712 the C pre-processor, including #!. #line directives are
3713 deliberately stripped to avoid confusion with Perl's version
3714 of #line. FWP played some golf with it so it will fit
3715 into VMS's 255 character buffer.
3718 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3720 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3722 Perl_sv_setpvf(aTHX_ cmd, "\
3723 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3724 perl, quote, code, quote, scriptname, SVfARG(cpp),
3725 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3727 PL_doextract = FALSE;
3729 DEBUG_P(PerlIO_printf(Perl_debug_log,
3730 "PL_preprocess: cmd=\"%s\"\n",
3733 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3737 else if (!*scriptname) {
3738 forbid_setid(0, *suidscript);
3739 PL_rsfp = PerlIO_stdin();
3742 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3743 # if defined(HAS_FCNTL) && defined(F_SETFD)
3745 /* ensure close-on-exec */
3746 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3749 #endif /* IAMSUID */
3751 /* PSz 16 Sep 03 Keep neat error message */
3753 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3755 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3756 CopFILE(PL_curcop), Strerror(errno));
3762 * I_SYSSTATVFS HAS_FSTATVFS
3764 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3765 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3766 * here so that metaconfig picks them up. */
3770 S_fd_on_nosuid_fs(pTHX_ int fd)
3773 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3774 * but is needed also on machines without setreuid.
3775 * Seems safe enough to run as root.
3777 int check_okay = 0; /* able to do all the required sys/libcalls */
3778 int on_nosuid = 0; /* the fd is on a nosuid fs */
3780 * Need to check noexec also: nosuid might not be set, the average
3781 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3783 int on_noexec = 0; /* the fd is on a noexec fs */
3786 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3787 * fstatvfs() is UNIX98.
3788 * fstatfs() is 4.3 BSD.
3789 * ustat()+getmnt() is pre-4.3 BSD.
3790 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3791 * an irrelevant filesystem while trying to reach the right one.
3794 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3796 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3797 defined(HAS_FSTATVFS)
3798 # define FD_ON_NOSUID_CHECK_OKAY
3799 struct statvfs stfs;
3801 check_okay = fstatvfs(fd, &stfs) == 0;
3802 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3804 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3805 on platforms where it is present. */
3806 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3808 # endif /* fstatvfs */
3810 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3811 defined(PERL_MOUNT_NOSUID) && \
3812 defined(PERL_MOUNT_NOEXEC) && \
3813 defined(HAS_FSTATFS) && \
3814 defined(HAS_STRUCT_STATFS) && \
3815 defined(HAS_STRUCT_STATFS_F_FLAGS)
3816 # define FD_ON_NOSUID_CHECK_OKAY
3819 check_okay = fstatfs(fd, &stfs) == 0;
3820 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3821 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3822 # endif /* fstatfs */
3824 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3825 defined(PERL_MOUNT_NOSUID) && \
3826 defined(PERL_MOUNT_NOEXEC) && \
3827 defined(HAS_FSTAT) && \
3828 defined(HAS_USTAT) && \
3829 defined(HAS_GETMNT) && \
3830 defined(HAS_STRUCT_FS_DATA) && \
3832 # define FD_ON_NOSUID_CHECK_OKAY
3835 if (fstat(fd, &fdst) == 0) {
3837 if (ustat(fdst.st_dev, &us) == 0) {
3839 /* NOSTAT_ONE here because we're not examining fields which
3840 * vary between that case and STAT_ONE. */
3841 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3842 size_t cmplen = sizeof(us.f_fname);
3843 if (sizeof(fsd.fd_req.path) < cmplen)
3844 cmplen = sizeof(fsd.fd_req.path);
3845 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3846 fdst.st_dev == fsd.fd_req.dev) {
3848 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3849 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3854 # endif /* fstat+ustat+getmnt */
3856 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3857 defined(HAS_GETMNTENT) && \
3858 defined(HAS_HASMNTOPT) && \
3859 defined(MNTOPT_NOSUID) && \
3860 defined(MNTOPT_NOEXEC)
3861 # define FD_ON_NOSUID_CHECK_OKAY
3862 FILE *mtab = fopen("/etc/mtab", "r");
3863 struct mntent *entry;
3866 if (mtab && (fstat(fd, &stb) == 0)) {
3867 while (entry = getmntent(mtab)) {
3868 if (stat(entry->mnt_dir, &fsb) == 0
3869 && fsb.st_dev == stb.st_dev)
3871 /* found the filesystem */
3873 if (hasmntopt(entry, MNTOPT_NOSUID))
3875 if (hasmntopt(entry, MNTOPT_NOEXEC))
3878 } /* A single fs may well fail its stat(). */
3883 # endif /* getmntent+hasmntopt */
3886 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3888 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3890 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3891 return ((!check_okay) || on_nosuid || on_noexec);
3893 #endif /* IAMSUID */
3896 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3897 int fdscript, int suidscript, SV *linestr_sv)
3902 #endif /* IAMSUID */
3904 /* do we need to emulate setuid on scripts? */
3906 /* This code is for those BSD systems that have setuid #! scripts disabled
3907 * in the kernel because of a security problem. Merely defining DOSUID
3908 * in perl will not fix that problem, but if you have disabled setuid
3909 * scripts in the kernel, this will attempt to emulate setuid and setgid
3910 * on scripts that have those now-otherwise-useless bits set. The setuid
3911 * root version must be called suidperl or sperlN.NNN. If regular perl
3912 * discovers that it has opened a setuid script, it calls suidperl with
3913 * the same argv that it had. If suidperl finds that the script it has
3914 * just opened is NOT setuid root, it sets the effective uid back to the
3915 * uid. We don't just make perl setuid root because that loses the
3916 * effective uid we had before invoking perl, if it was different from the
3919 * Description/comments above do not match current workings:
3920 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3921 * suidperl called with script open and name changed to /dev/fd/N/X;
3922 * suidperl croaks if script is not setuid;
3923 * making perl setuid would be a huge security risk (and yes, that
3924 * would lose any euid we might have had).
3926 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3927 * be defined in suidperl only. suidperl must be setuid root. The
3928 * Configure script will set this up for you if you want it.
3934 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3935 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3936 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3938 const char *linestr;
3942 if (fdscript < 0 || suidscript != 1)
3943 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3945 * Since the script is opened by perl, not suidperl, some of these
3946 * checks are superfluous. Leaving them in probably does not lower
3950 * Do checks even for systems with no HAS_SETREUID.
3951 * We used to swap, then re-swap UIDs with
3953 if (setreuid(PL_euid,PL_uid) < 0
3954 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3955 Perl_croak(aTHX_ "Can't swap uid and euid");
3958 if (setreuid(PL_uid,PL_euid) < 0
3959 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3960 Perl_croak(aTHX_ "Can't reswap uid and euid");
3964 /* On this access check to make sure the directories are readable,
3965 * there is actually a small window that the user could use to make
3966 * filename point to an accessible directory. So there is a faint
3967 * chance that someone could execute a setuid script down in a
3968 * non-accessible directory. I don't know what to do about that.
3969 * But I don't think it's too important. The manual lies when
3970 * it says access() is useful in setuid programs.
3972 * So, access() is pretty useless... but not harmful... do anyway.
3974 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3975 Perl_croak(aTHX_ "Can't access() script\n");
3978 /* If we can swap euid and uid, then we can determine access rights
3979 * with a simple stat of the file, and then compare device and
3980 * inode to make sure we did stat() on the same file we opened.
3981 * Then we just have to make sure he or she can execute it.
3984 * As the script is opened by perl, not suidperl, we do not need to
3985 * care much about access rights.
3987 * The 'script changed' check is needed, or we can get lied to
3988 * about $0 with e.g.
3989 * suidperl /dev/fd/4//bin/x 4<setuidscript
3990 * Without HAS_SETREUID, is it safe to stat() as root?
3992 * Are there any operating systems that pass /dev/fd/xxx for setuid
3993 * scripts, as suggested/described in perlsec(1)? Surely they do not
3994 * pass the script name as we do, so the "script changed" test would
3995 * fail for them... but we never get here with
3996 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3998 * This is one place where we must "lie" about return status: not
3999 * say if the stat() failed. We are doing this as root, and could
4000 * be tricked into reporting existence or not of files that the
4001 * "plain" user cannot even see.
4005 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4006 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4007 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4008 Perl_croak(aTHX_ "Setuid script changed\n");
4012 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4013 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4016 * We used to do this check as the "plain" user (after swapping
4017 * UIDs). But the check for nosuid and noexec filesystem is needed,
4018 * and should be done even without HAS_SETREUID. (Maybe those
4019 * operating systems do not have such mount options anyway...)
4020 * Seems safe enough to do as root.
4022 #if !defined(NO_NOSUID_CHECK)
4023 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4024 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4027 #endif /* IAMSUID */
4029 if (!S_ISREG(PL_statbuf.st_mode)) {
4030 Perl_croak(aTHX_ "Setuid script not plain file\n");
4032 if (PL_statbuf.st_mode & S_IWOTH)
4033 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4034 PL_doswitches = FALSE; /* -s is insecure in suid */
4035 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4036 CopLINE_inc(PL_curcop);
4037 if (sv_gets(linestr_sv, PL_rsfp, 0) == NULL)
4038 Perl_croak(aTHX_ "No #! line");
4039 linestr = SvPV_nolen_const(linestr_sv);
4040 /* required even on Sys V */
4041 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4042 Perl_croak(aTHX_ "No #! line");
4046 /* Sanity check on line length */
4047 s_end = s + strlen(s);
4048 if (s_end == s || (s_end - s) > 4000)
4049 Perl_croak(aTHX_ "Very long #! line");
4050 /* Allow more than a single space after #! */
4051 while (isSPACE(*s)) s++;
4052 /* Sanity check on buffer end */
4053 while ((*s) && !isSPACE(*s)) s++;
4054 for (s2 = s; (s2 > linestr &&
4055 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4056 || s2[-1] == '-')); s2--) ;
4057 /* Sanity check on buffer start */
4058 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4059 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4060 Perl_croak(aTHX_ "Not a perl script");
4061 while (*s == ' ' || *s == '\t') s++;
4063 * #! arg must be what we saw above. They can invoke it by
4064 * mentioning suidperl explicitly, but they may not add any strange
4065 * arguments beyond what #! says if they do invoke suidperl that way.
4068 * The way validarg was set up, we rely on the kernel to start
4069 * scripts with argv[1] set to contain all #! line switches (the
4073 * Check that we got all the arguments listed in the #! line (not
4074 * just that there are no extraneous arguments). Might not matter
4075 * much, as switches from #! line seem to be acted upon (also), and
4076 * so may be checked and trapped in perl. But, security checks must
4077 * be done in suidperl and not deferred to perl. Note that suidperl
4078 * does not get around to parsing (and checking) the switches on
4079 * the #! line (but execs perl sooner).
4080 * Allow (require) a trailing newline (which may be of two
4081 * characters on some architectures?) (but no other trailing
4084 len = strlen(validarg);
4085 if (strEQ(validarg," PHOOEY ") ||
4086 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4087 !((s_end - s) == len+1
4088 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4089 Perl_croak(aTHX_ "Args must match #! line");
4093 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4094 PL_euid == PL_statbuf.st_uid)
4096 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4097 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4098 #endif /* IAMSUID */
4101 PL_euid) { /* oops, we're not the setuid root perl */
4103 * When root runs a setuid script, we do not go through the same
4104 * steps of execing sperl and then perl with fd scripts, but
4105 * simply set up UIDs within the same perl invocation; so do
4106 * not have the same checks (on options, whatever) that we have
4107 * for plain users. No problem really: would have to be a script
4108 * that does not actually work for plain users; and if root is
4109 * foolish and can be persuaded to run such an unsafe script, he
4110 * might run also non-setuid ones, and deserves what he gets.
4112 * Or, we might drop the PL_euid check above (and rely just on
4113 * fdscript to avoid loops), and do the execs
4119 * Pass fd script to suidperl.
4120 * Exec suidperl, substituting fd script for scriptname.
4121 * Pass script name as "subdir" of fd, which perl will grok;
4122 * in fact will use that to distinguish this from "normal"
4123 * usage, see comments above.
4125 PerlIO_rewind(PL_rsfp);
4126 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4127 /* PSz 27 Feb 04 Sanity checks on scriptname */
4128 if ((!scriptname) || (!*scriptname) ) {
4129 Perl_croak(aTHX_ "No setuid script name\n");
4131 if (*scriptname == '-') {
4132 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4133 /* Or we might confuse it with an option when replacing
4134 * name in argument list, below (though we do pointer, not
4135 * string, comparisons).
4138 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4139 if (!PL_origargv[which]) {
4140 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4142 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4143 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4144 #if defined(HAS_FCNTL) && defined(F_SETFD)
4145 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4148 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4149 (int)PERL_REVISION, (int)PERL_VERSION,
4150 (int)PERL_SUBVERSION), PL_origargv);
4152 #endif /* IAMSUID */
4153 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4156 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4158 * This seems back to front: we try HAS_SETEGID first; if not available
4159 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4160 * in the sense that we only want to set EGID; but are there any machines
4161 * with either of the latter, but not the former? Same with UID, later.
4164 (void)setegid(PL_statbuf.st_gid);
4167 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4169 #ifdef HAS_SETRESGID
4170 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4172 PerlProc_setgid(PL_statbuf.st_gid);
4176 if (PerlProc_getegid() != PL_statbuf.st_gid)
4177 Perl_croak(aTHX_ "Can't do setegid!\n");
4179 if (PL_statbuf.st_mode & S_ISUID) {
4180 if (PL_statbuf.st_uid != PL_euid)
4182 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4185 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4187 #ifdef HAS_SETRESUID
4188 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4190 PerlProc_setuid(PL_statbuf.st_uid);
4194 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4195 Perl_croak(aTHX_ "Can't do seteuid!\n");
4197 else if (PL_uid) { /* oops, mustn't run as root */
4199 (void)seteuid((Uid_t)PL_uid);
4202 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4204 #ifdef HAS_SETRESUID
4205 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4207 PerlProc_setuid((Uid_t)PL_uid);
4211 if (PerlProc_geteuid() != PL_uid)
4212 Perl_croak(aTHX_ "Can't do seteuid!\n");
4215 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4216 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4219 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4220 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4221 else if (fdscript < 0 || suidscript != 1)
4222 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4223 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4225 /* PSz 16 Sep 03 Keep neat error message */
4226 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4229 /* We absolutely must clear out any saved ids here, so we */
4230 /* exec the real perl, substituting fd script for scriptname. */
4231 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4233 * It might be thought that using setresgid and/or setresuid (changed to
4234 * set the saved IDs) above might obviate the need to exec, and we could
4235 * go on to "do the perl thing".
4237 * Is there such a thing as "saved GID", and is that set for setuid (but
4238 * not setgid) execution like suidperl? Without exec, it would not be
4239 * cleared for setuid (but not setgid) scripts (or might need a dummy
4242 * We need suidperl to do the exact same argument checking that perl
4243 * does. Thus it cannot be very small; while it could be significantly
4244 * smaller, it is safer (simpler?) to make it essentially the same
4245 * binary as perl (but they are not identical). - Maybe could defer that
4246 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4247 * but prefer to do thorough checks in suidperl itself. Such deferral
4248 * would make suidperl security rely on perl, a design no-no.
4250 * Setuid things should be short and simple, thus easy to understand and
4251 * verify. They should do their "own thing", without influence by
4252 * attackers. It may help if their internal execution flow is fixed,
4253 * regardless of platform: it may be best to exec anyway.
4255 * Suidperl should at least be conceptually simple: a wrapper only,
4256 * never to do any real perl. Maybe we should put
4258 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4260 * into the perly bits.
4262 PerlIO_rewind(PL_rsfp);
4263 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4265 * Keep original arguments: suidperl already has fd script.
4267 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4268 /* if (!PL_origargv[which]) { */
4269 /* errno = EPERM; */
4270 /* Perl_croak(aTHX_ "Permission denied\n"); */
4272 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4273 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4274 #if defined(HAS_FCNTL) && defined(F_SETFD)
4275 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4278 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4279 (int)PERL_REVISION, (int)PERL_VERSION,
4280 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4282 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4283 #endif /* IAMSUID */
4285 PERL_UNUSED_ARG(fdscript);
4286 PERL_UNUSED_ARG(suidscript);
4287 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4288 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4289 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4290 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4292 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4295 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4296 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4297 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4298 /* not set-id, must be wrapped */
4301 PERL_UNUSED_ARG(validarg);
4302 PERL_UNUSED_ARG(scriptname);
4306 S_find_beginning(pTHX_ SV* linestr_sv)
4310 register const char *s2;
4311 #ifdef MACOS_TRADITIONAL
4315 /* skip forward in input to the real script? */
4317 #ifdef MACOS_TRADITIONAL
4318 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4320 while (PL_doextract || gMacPerl_AlwaysExtract) {
4321 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL) {
4322 if (!gMacPerl_AlwaysExtract)
4323 Perl_croak(aTHX_ "No Perl script found in input\n");
4325 if (PL_doextract) /* require explicit override ? */
4326 if (!OverrideExtract(PL_origfilename))
4327 Perl_croak(aTHX_ "User aborted script\n");
4329 PL_doextract = FALSE;
4331 /* Pater peccavi, file does not have #! */
4332 PerlIO_rewind(PL_rsfp);
4337 while (PL_doextract) {
4338 if ((s = sv_gets(linestr_sv, PL_rsfp, 0)) == NULL)
4339 Perl_croak(aTHX_ "No Perl script found in input\n");
4342 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4343 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4344 PL_doextract = FALSE;
4345 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4347 while (*s == ' ' || *s == '\t') s++;
4349 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4350 || s2[-1] == '_') s2--;
4351 if (strnEQ(s2-4,"perl",4))
4352 while ((s = moreswitches(s)))
4355 #ifdef MACOS_TRADITIONAL
4356 /* We are always searching for the #!perl line in MacPerl,
4357 * so if we find it, still keep the line count correct
4358 * by counting lines we already skipped over
4360 for (; maclines > 0 ; maclines--)
4361 PerlIO_ungetc(PL_rsfp, '\n');
4365 /* gMacPerl_AlwaysExtract is false in MPW tool */
4366 } else if (gMacPerl_AlwaysExtract) {
4378 PL_uid = PerlProc_getuid();
4379 PL_euid = PerlProc_geteuid();
4380 PL_gid = PerlProc_getgid();
4381 PL_egid = PerlProc_getegid();
4383 PL_uid |= PL_gid << 16;
4384 PL_euid |= PL_egid << 16;
4386 /* Should not happen: */
4387 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4388 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4391 * Should go by suidscript, not uid!=euid: why disallow
4392 * system("ls") in scripts run from setuid things?
4393 * Or, is this run before we check arguments and set suidscript?
4394 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4395 * (We never have suidscript, can we be sure to have fdscript?)
4396 * Or must then go by UID checks? See comments in forbid_setid also.
4400 /* This is used very early in the lifetime of the program,
4401 * before even the options are parsed, so PL_tainting has
4402 * not been initialized properly. */
4404 Perl_doing_taint(int argc, char *argv[], char *envp[])
4406 #ifndef PERL_IMPLICIT_SYS
4407 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4408 * before we have an interpreter-- and the whole point of this
4409 * function is to be called at such an early stage. If you are on
4410 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4411 * "tainted because running with altered effective ids', you'll
4412 * have to add your own checks somewhere in here. The two most
4413 * known samples of 'implicitness' are Win32 and NetWare, neither
4414 * of which has much of concept of 'uids'. */
4415 int uid = PerlProc_getuid();
4416 int euid = PerlProc_geteuid();
4417 int gid = PerlProc_getgid();
4418 int egid = PerlProc_getegid();
4425 if (uid && (euid != uid || egid != gid))
4427 #endif /* !PERL_IMPLICIT_SYS */
4428 /* This is a really primitive check; environment gets ignored only
4429 * if -T are the first chars together; otherwise one gets
4430 * "Too late" message. */
4431 if ( argc > 1 && argv[1][0] == '-'
4432 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4437 /* Passing the flag as a single char rather than a string is a slight space
4438 optimisation. The only message that isn't /^-.$/ is
4439 "program input from stdin", which is substituted in place of '\0', which
4440 could never be a command line flag. */
4442 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4445 char string[3] = "-x";
4446 const char *message = "program input from stdin";
4453 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4454 if (PL_euid != PL_uid)
4455 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4456 if (PL_egid != PL_gid)
4457 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4458 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4460 * Checks for UID/GID above "wrong": why disallow
4461 * perl -e 'print "Hello\n"'
4462 * from within setuid things?? Simply drop them: replaced by
4463 * fdscript/suidscript and #ifdef IAMSUID checks below.
4465 * This may be too late for command-line switches. Will catch those on
4466 * the #! line, after finding the script name and setting up
4467 * fdscript/suidscript. Note that suidperl does not get around to
4468 * parsing (and checking) the switches on the #! line, but checks that
4469 * the two sets are identical.
4471 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4472 * instead, or would that be "too late"? (We never have suidscript, can
4473 * we be sure to have fdscript?)
4475 * Catch things with suidscript (in descendant of suidperl), even with
4476 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4477 * below; but I am paranoid.
4479 * Also see comments about root running a setuid script, elsewhere.
4481 if (suidscript >= 0)
4482 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4484 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4485 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4486 #endif /* IAMSUID */
4490 Perl_init_debugger(pTHX)
4493 HV * const ostash = PL_curstash;
4495 PL_curstash = PL_debstash;
4496 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4498 AvREAL_off(PL_dbargs);
4499 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4500 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4501 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4502 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4503 sv_setiv(PL_DBsingle, 0);
4504 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4505 sv_setiv(PL_DBtrace, 0);
4506 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4507 sv_setiv(PL_DBsignal, 0);
4508 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4509 sv_setiv(PL_DBassertion, 0);
4510 PL_curstash = ostash;
4513 #ifndef STRESS_REALLOC
4514 #define REASONABLE(size) (size)
4516 #define REASONABLE(size) (1) /* unreasonable */
4520 Perl_init_stacks(pTHX)
4523 /* start with 128-item stack and 8K cxstack */
4524 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4525 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4526 PL_curstackinfo->si_type = PERLSI_MAIN;
4527 PL_curstack = PL_curstackinfo->si_stack;
4528 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4530 PL_stack_base = AvARRAY(PL_curstack);
4531 PL_stack_sp = PL_stack_base;
4532 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4534 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4537 PL_tmps_max = REASONABLE(128);
4539 Newx(PL_markstack,REASONABLE(32),I32);
4540 PL_markstack_ptr = PL_markstack;
4541 PL_markstack_max = PL_markstack + REASONABLE(32);
4545 Newx(PL_scopestack,REASONABLE(32),I32);
4546 PL_scopestack_ix = 0;
4547 PL_scopestack_max = REASONABLE(32);
4549 Newx(PL_savestack,REASONABLE(128),ANY);
4550 PL_savestack_ix = 0;
4551 PL_savestack_max = REASONABLE(128);
4560 while (PL_curstackinfo->si_next)
4561 PL_curstackinfo = PL_curstackinfo->si_next;
4562 while (PL_curstackinfo) {
4563 PERL_SI *p = PL_curstackinfo->si_prev;
4564 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4565 Safefree(PL_curstackinfo->si_cxstack);
4566 Safefree(PL_curstackinfo);
4567 PL_curstackinfo = p;
4569 Safefree(PL_tmps_stack);
4570 Safefree(PL_markstack);
4571 Safefree(PL_scopestack);
4572 Safefree(PL_savestack);
4577 S_init_predump_symbols(pTHX)
4583 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4584 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4585 GvMULTI_on(PL_stdingv);
4586 io = GvIOp(PL_stdingv);
4587 IoTYPE(io) = IoTYPE_RDONLY;
4588 IoIFP(io) = PerlIO_stdin();
4589 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4591 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4593 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4596 IoTYPE(io) = IoTYPE_WRONLY;
4597 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4599 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4601 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4603 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4604 GvMULTI_on(PL_stderrgv);
4605 io = GvIOp(PL_stderrgv);
4606 IoTYPE(io) = IoTYPE_WRONLY;
4607 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4608 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4610 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4612 PL_statname = newSV(0); /* last filename we did stat on */
4614 Safefree(PL_osname);
4615 PL_osname = savepv(OSNAME);
4619 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4622 argc--,argv++; /* skip name of script */
4623 if (PL_doswitches) {
4624 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4628 if (argv[0][1] == '-' && !argv[0][2]) {
4632 if ((s = strchr(argv[0], '='))) {
4633 const char *const start_name = argv[0] + 1;
4634 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4635 TRUE, SVt_PV)), s + 1);
4638 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4641 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4642 GvMULTI_on(PL_argvgv);
4643 (void)gv_AVadd(PL_argvgv);
4644 av_clear(GvAVn(PL_argvgv));
4645 for (; argc > 0; argc--,argv++) {
4646 SV * const sv = newSVpv(argv[0],0);
4647 av_push(GvAVn(PL_argvgv),sv);
4648 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4649 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4652 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4653 (void)sv_utf8_decode(sv);
4659 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4664 PL_toptarget = newSV_type(SVt_PVFM);
4665 sv_setpvn(PL_toptarget, "", 0);
4666 PL_bodytarget = newSV_type(SVt_PVFM);
4667 sv_setpvn(PL_bodytarget, "", 0);
4668 PL_formtarget = PL_bodytarget;
4672 init_argv_symbols(argc,argv);
4674 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4675 #ifdef MACOS_TRADITIONAL
4676 /* $0 is not majick on a Mac */
4677 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4679 sv_setpv(GvSV(tmpgv),PL_origfilename);
4680 magicname("0", "0", 1);
4683 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4685 bool env_is_not_environ;
4686 GvMULTI_on(PL_envgv);
4687 hv = GvHVn(PL_envgv);
4688 hv_magic(hv, NULL, PERL_MAGIC_env);
4690 #ifdef USE_ENVIRON_ARRAY
4691 /* Note that if the supplied env parameter is actually a copy
4692 of the global environ then it may now point to free'd memory
4693 if the environment has been modified since. To avoid this
4694 problem we treat env==NULL as meaning 'use the default'
4698 env_is_not_environ = env != environ;
4699 if (env_is_not_environ
4700 # ifdef USE_ITHREADS
4701 && PL_curinterp == aTHX
4710 for (; *env; env++) {
4711 if (!(s = strchr(*env,'=')) || s == *env)
4713 #if defined(MSDOS) && !defined(DJGPP)
4718 sv = newSVpv(s+1, 0);
4719 (void)hv_store(hv, *env, s - *env, sv, 0);
4720 if (env_is_not_environ)
4724 #endif /* USE_ENVIRON_ARRAY */
4725 #endif /* !PERL_MICRO */
4728 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4729 SvREADONLY_off(GvSV(tmpgv));
4730 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4731 SvREADONLY_on(GvSV(tmpgv));
4733 #ifdef THREADS_HAVE_PIDS
4734 PL_ppid = (IV)getppid();
4737 /* touch @F array to prevent spurious warnings 20020415 MJD */
4739 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4744 S_init_perllib(pTHX)
4750 s = PerlEnv_getenv("PERL5LIB");
4752 * It isn't possible to delete an environment variable with
4753 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4754 * case we treat PERL5LIB as undefined if it has a zero-length value.
4756 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4757 if (s && *s != '\0')
4761 incpush(s, TRUE, TRUE, TRUE, FALSE);
4763 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4765 /* Treat PERL5?LIB as a possible search list logical name -- the
4766 * "natural" VMS idiom for a Unix path string. We allow each
4767 * element to be a set of |-separated directories for compatibility.
4771 if (my_trnlnm("PERL5LIB",buf,0))
4772 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4774 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4778 /* Use the ~-expanded versions of APPLLIB (undocumented),
4779 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4782 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4786 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4788 #ifdef MACOS_TRADITIONAL
4791 SV * privdir = newSV(0);
4792 char * macperl = PerlEnv_getenv("MACPERL");
4797 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4798 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4799 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4800 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4801 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4802 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4804 SvREFCNT_dec(privdir);
4807 incpush(":", FALSE, FALSE, TRUE, FALSE);
4810 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4813 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4815 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4819 /* sitearch is always relative to sitelib on Windows for
4820 * DLL-based path intuition to work correctly */
4821 # if !defined(WIN32)
4822 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4828 /* this picks up sitearch as well */
4829 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4831 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4835 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4836 /* Search for version-specific dirs below here */
4837 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4840 #ifdef PERL_VENDORARCH_EXP
4841 /* vendorarch is always relative to vendorlib on Windows for
4842 * DLL-based path intuition to work correctly */
4843 # if !defined(WIN32)
4844 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4848 #ifdef PERL_VENDORLIB_EXP
4850 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4852 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4856 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4857 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4860 #ifdef PERL_OTHERLIBDIRS
4861 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4865 incpush(".", FALSE, FALSE, TRUE, FALSE);
4866 #endif /* MACOS_TRADITIONAL */
4869 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4870 # define PERLLIB_SEP ';'
4873 # define PERLLIB_SEP '|'
4875 # if defined(MACOS_TRADITIONAL)
4876 # define PERLLIB_SEP ','
4878 # define PERLLIB_SEP ':'
4882 #ifndef PERLLIB_MANGLE
4883 # define PERLLIB_MANGLE(s,n) (s)
4886 /* Push a directory onto @INC if it exists.
4887 Generate a new SV if we do this, to save needing to copy the SV we push
4890 S_incpush_if_exists(pTHX_ SV *dir)
4894 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4895 S_ISDIR(tmpstatbuf.st_mode)) {
4896 av_push(GvAVn(PL_incgv), dir);
4903 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4908 const char *p = dir;
4913 if (addsubdirs || addoldvers) {
4917 /* Break at all separators */
4919 SV *libdir = newSV(0);
4922 /* skip any consecutive separators */
4924 while ( *p == PERLLIB_SEP ) {
4925 /* Uncomment the next line for PATH semantics */
4926 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4931 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4932 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4937 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4938 p = NULL; /* break out */
4940 #ifdef MACOS_TRADITIONAL
4941 if (!strchr(SvPVX(libdir), ':')) {
4944 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4946 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4947 sv_catpvs(libdir, ":");
4950 /* Do the if() outside the #ifdef to avoid warnings about an unused
4953 #ifdef PERL_RELOCATABLE_INC
4955 * Relocatable include entries are marked with a leading .../
4958 * 0: Remove that leading ".../"
4959 * 1: Remove trailing executable name (anything after the last '/')
4960 * from the perl path to give a perl prefix
4962 * While the @INC element starts "../" and the prefix ends with a real
4963 * directory (ie not . or ..) chop that real directory off the prefix
4964 * and the leading "../" from the @INC element. ie a logical "../"
4966 * Finally concatenate the prefix and the remainder of the @INC element
4967 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4968 * generates /usr/local/lib/perl5
4970 const char *libpath = SvPVX(libdir);
4971 STRLEN libpath_len = SvCUR(libdir);
4972 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4974 SV * const caret_X = get_sv("\030", 0);
4975 /* Going to use the SV just as a scratch buffer holding a C
4981 /* $^X is *the* source of taint if tainting is on, hence
4982 SvPOK() won't be true. */
4984 assert(SvPOKp(caret_X));
4985 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4986 /* Firstly take off the leading .../
4987 If all else fail we'll do the paths relative to the current
4989 sv_chop(libdir, libpath + 4);
4990 /* Don't use SvPV as we're intentionally bypassing taining,
4991 mortal copies that the mg_get of tainting creates, and
4992 corruption that seems to come via the save stack.
4993 I guess that the save stack isn't correctly set up yet. */
4994 libpath = SvPVX(libdir);
4995 libpath_len = SvCUR(libdir);
4997 /* This would work more efficiently with memrchr, but as it's
4998 only a GNU extension we'd need to probe for it and
4999 implement our own. Not hard, but maybe not worth it? */
5001 prefix = SvPVX(prefix_sv);
5002 lastslash = strrchr(prefix, '/');
5004 /* First time in with the *lastslash = '\0' we just wipe off
5005 the trailing /perl from (say) /usr/foo/bin/perl
5009 while ((*lastslash = '\0'), /* Do that, come what may. */
5010 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5011 && (lastslash = strrchr(prefix, '/')))) {
5012 if (lastslash[1] == '\0'
5013 || (lastslash[1] == '.'
5014 && (lastslash[2] == '/' /* ends "/." */
5015 || (lastslash[2] == '/'
5016 && lastslash[3] == '/' /* or "/.." */
5018 /* Prefix ends "/" or "/." or "/..", any of which
5019 are fishy, so don't do any more logical cleanup.
5023 /* Remove leading "../" from path */
5026 /* Next iteration round the loop removes the last
5027 directory name from prefix by writing a '\0' in
5028 the while clause. */
5030 /* prefix has been terminated with a '\0' to the correct
5031 length. libpath points somewhere into the libdir SV.
5032 We need to join the 2 with '/' and drop the result into
5034 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5035 SvREFCNT_dec(libdir);
5036 /* And this is the new libdir. */
5039 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5040 /* Need to taint reloccated paths if running set ID */
5041 SvTAINTED_on(libdir);
5044 SvREFCNT_dec(prefix_sv);
5049 * BEFORE pushing libdir onto @INC we may first push version- and
5050 * archname-specific sub-directories.
5052 if (addsubdirs || addoldvers) {
5053 #ifdef PERL_INC_VERSION_LIST
5054 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5055 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5056 const char * const *incver;
5062 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5064 while (unix[len-1] == '/') len--; /* Cosmetic */
5065 sv_usepvn(libdir,unix,len);
5068 PerlIO_printf(Perl_error_log,
5069 "Failed to unixify @INC element \"%s\"\n",
5073 #ifdef MACOS_TRADITIONAL
5074 #define PERL_AV_SUFFIX_FMT ""
5075 #define PERL_ARCH_FMT "%s:"
5076 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5078 #define PERL_AV_SUFFIX_FMT "/"
5079 #define PERL_ARCH_FMT "/%s"
5080 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5082 /* .../version/archname if -d .../version/archname */
5083 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5085 (int)PERL_REVISION, (int)PERL_VERSION,
5086 (int)PERL_SUBVERSION, ARCHNAME);
5087 subdir = S_incpush_if_exists(aTHX_ subdir);
5089 /* .../version if -d .../version */
5090 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5092 (int)PERL_REVISION, (int)PERL_VERSION,
5093 (int)PERL_SUBVERSION);
5094 subdir = S_incpush_if_exists(aTHX_ subdir);
5096 /* .../archname if -d .../archname */
5097 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5098 SVfARG(libdir), ARCHNAME);
5099 subdir = S_incpush_if_exists(aTHX_ subdir);
5103 #ifdef PERL_INC_VERSION_LIST
5105 for (incver = incverlist; *incver; incver++) {
5106 /* .../xxx if -d .../xxx */
5107 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5108 SVfARG(libdir), *incver);
5109 subdir = S_incpush_if_exists(aTHX_ subdir);
5115 /* finally push this lib directory on the end of @INC */
5116 av_push(GvAVn(PL_incgv), libdir);
5119 assert (SvREFCNT(subdir) == 1);
5120 SvREFCNT_dec(subdir);
5126 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5130 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5136 while (av_len(paramList) >= 0) {
5137 cv = (CV*)av_shift(paramList);
5139 if (paramList == PL_beginav) {
5140 /* save PL_beginav for compiler */
5141 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5143 else if (paramList == PL_checkav) {
5144 /* save PL_checkav for compiler */
5145 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5147 else if (paramList == PL_unitcheckav) {
5148 /* save PL_unitcheckav for compiler */
5149 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5160 PL_madskills |= 16384;
5165 PL_madskills &= ~16384;
5168 (void)SvPV_const(atsv, len);
5170 PL_curcop = &PL_compiling;
5171 CopLINE_set(PL_curcop, oldline);
5172 if (paramList == PL_beginav)
5173 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5175 Perl_sv_catpvf(aTHX_ atsv,
5176 "%s failed--call queue aborted",
5177 paramList == PL_checkav ? "CHECK"
5178 : paramList == PL_initav ? "INIT"
5179 : paramList == PL_unitcheckav ? "UNITCHECK"
5181 while (PL_scopestack_ix > oldscope)
5184 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5191 /* my_exit() was called */
5192 while (PL_scopestack_ix > oldscope)
5195 PL_curstash = PL_defstash;
5196 PL_curcop = &PL_compiling;
5197 CopLINE_set(PL_curcop, oldline);
5199 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5200 if (paramList == PL_beginav)
5201 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5203 Perl_croak(aTHX_ "%s failed--call queue aborted",
5204 paramList == PL_checkav ? "CHECK"
5205 : paramList == PL_initav ? "INIT"
5206 : paramList == PL_unitcheckav ? "UNITCHECK"
5213 PL_curcop = &PL_compiling;
5214 CopLINE_set(PL_curcop, oldline);
5217 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5226 Perl_my_exit(pTHX_ U32 status)
5229 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5230 (void*)thr, (unsigned long) status));
5239 STATUS_EXIT_SET(status);
5246 Perl_my_failure_exit(pTHX)
5250 /* We have been called to fall on our sword. The desired exit code
5251 * should be already set in STATUS_UNIX, but could be shifted over
5252 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5255 * If an error code has not been set, then force the issue.
5257 if (MY_POSIX_EXIT) {
5259 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5260 * the exit code when there isn't an error.
5263 if (STATUS_UNIX == 0)
5264 STATUS_UNIX_EXIT_SET(255);
5266 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5268 /* The exit code could have been set by $? or vmsish which
5269 * means that it may not be fatal. So convert
5270 * success/warning codes to fatal.
5272 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5273 STATUS_UNIX_EXIT_SET(255);
5277 /* Traditionally Perl on VMS always expects a Fatal Error. */
5278 if (vaxc$errno & 1) {
5280 /* So force success status to failure */
5281 if (STATUS_NATIVE & 1)
5286 STATUS_UNIX = EINTR; /* In case something cares */
5291 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5293 /* Encode the severity code */
5294 severity = STATUS_NATIVE & STS$M_SEVERITY;
5295 STATUS_UNIX = (severity ? severity : 1) << 8;
5297 /* Perl expects this to be a fatal error */
5298 if (severity != STS$K_SEVERE)
5307 STATUS_UNIX_SET(errno);
5309 exitstatus = STATUS_UNIX >> 8;
5310 if (exitstatus & 255)
5311 STATUS_UNIX_SET(exitstatus);
5313 STATUS_UNIX_SET(255);
5320 S_my_exit_jump(pTHX)
5325 SvREFCNT_dec(PL_e_script);
5329 POPSTACK_TO(PL_mainstack);
5337 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5340 const char * const p = SvPVX_const(PL_e_script);
5341 const char *nl = strchr(p, '\n');
5343 PERL_UNUSED_ARG(idx);
5344 PERL_UNUSED_ARG(maxlen);
5346 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5348 filter_del(read_e_script);
5351 sv_catpvn(buf_sv, p, nl-p);
5352 sv_chop(PL_e_script, nl);
5358 * c-indentation-style: bsd
5360 * indent-tabs-mode: t
5363 * ex: set ts=8 sts=4 sw=4 noet: