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)
1661 int argc = PL_origargc;
1662 char **argv = PL_origargv;
1663 const char *scriptname = NULL;
1664 VOL bool dosearch = FALSE;
1665 const char *validarg = "";
1667 register char *s, c;
1668 const char *cddir = NULL;
1669 #ifdef USE_SITECUSTOMIZE
1670 bool minus_f = FALSE;
1673 sv_setpvn(PL_linestr,"",0);
1674 sv = newSVpvs(""); /* first used for -I flags */
1678 for (argc--,argv++; argc > 0; argc--,argv++) {
1679 if (argv[0][0] != '-' || !argv[0][1])
1683 validarg = " PHOOEY ";
1687 * Can we rely on the kernel to start scripts with argv[1] set to
1688 * contain all #! line switches (the whole line)? (argv[0] is set to
1689 * the interpreter name, argv[2] to the script name; argv[3] and
1690 * above may contain other arguments.)
1697 #ifndef PERL_STRICT_CR
1722 if ((s = moreswitches(s)))
1727 CHECK_MALLOC_TOO_LATE_FOR('t');
1728 if( !PL_tainting ) {
1729 PL_taint_warn = TRUE;
1735 CHECK_MALLOC_TOO_LATE_FOR('T');
1737 PL_taint_warn = FALSE;
1745 #ifdef MACOS_TRADITIONAL
1746 /* ignore -e for Dev:Pseudo argument */
1747 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1750 forbid_setid('e', -1);
1752 PL_e_script = newSVpvs("");
1753 filter_add(read_e_script, NULL);
1756 sv_catpv(PL_e_script, s);
1758 sv_catpv(PL_e_script, argv[1]);
1762 Perl_croak(aTHX_ "No code specified for -%c", c);
1763 sv_catpvs(PL_e_script, "\n");
1767 #ifdef USE_SITECUSTOMIZE
1773 case 'I': /* -I handled both here and in moreswitches() */
1774 forbid_setid('I', -1);
1775 if (!*++s && (s=argv[1]) != NULL) {
1779 STRLEN len = strlen(s);
1780 const char * const p = savepvn(s, len);
1781 incpush(p, TRUE, TRUE, FALSE, FALSE);
1782 sv_catpvs(sv, "-I");
1783 sv_catpvn(sv, p, len);
1788 Perl_croak(aTHX_ "No directory specified for -I");
1791 forbid_setid('P', -1);
1792 PL_preprocess = TRUE;
1796 forbid_setid('S', -1);
1804 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1808 opts_prog = newSVpvs("print Config::myconfig(),");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1812 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1814 opts = SvCUR(opts_prog);
1816 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1820 # ifdef DEBUG_LEAKING_SCALARS
1821 " DEBUG_LEAKING_SCALARS"
1823 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1824 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1826 # ifdef FAKE_THREADS
1829 # ifdef MULTIPLICITY
1838 # ifdef PERL_DEBUG_READONLY_OPS
1839 " PERL_DEBUG_READONLY_OPS"
1841 # ifdef PERL_DONT_CREATE_GVSV
1842 " PERL_DONT_CREATE_GVSV"
1844 # ifdef PERL_GLOBAL_STRUCT
1845 " PERL_GLOBAL_STRUCT"
1847 # ifdef PERL_IMPLICIT_CONTEXT
1848 " PERL_IMPLICIT_CONTEXT"
1850 # ifdef PERL_IMPLICIT_SYS
1851 " PERL_IMPLICIT_SYS"
1856 # ifdef PERL_MALLOC_WRAP
1859 # ifdef PERL_MEM_LOG
1862 # ifdef PERL_MEM_LOG_ENV
1865 # ifdef PERL_MEM_LOG_ENV_FD
1866 " PERL_MEM_LOG_ENV_FD"
1868 # ifdef PERL_MEM_LOG_STDERR
1869 " PERL_MEM_LOG_STDERR"
1871 # ifdef PERL_MEM_LOG_TIMESTAMP
1872 " PERL_MEM_LOG_TIMESTAMP"
1874 # ifdef PERL_NEED_APPCTX
1877 # ifdef PERL_NEED_TIMESBASE
1878 " PERL_NEED_TIMESBASE"
1880 # ifdef PERL_OLD_COPY_ON_WRITE
1881 " PERL_OLD_COPY_ON_WRITE"
1886 # ifdef PERL_TRACK_MEMPOOL
1887 " PERL_TRACK_MEMPOOL"
1889 # ifdef PERL_USE_SAFE_PUTENV
1890 " PERL_USE_SAFE_PUTENV"
1892 # ifdef PERL_USES_PL_PIDSTATUS
1893 " PERL_USES_PL_PIDSTATUS"
1895 # ifdef PL_OP_SLAB_ALLOC
1898 # ifdef THREADS_HAVE_PIDS
1899 " THREADS_HAVE_PIDS"
1901 # ifdef USE_64_BIT_ALL
1904 # ifdef USE_64_BIT_INT
1907 # ifdef USE_ITHREADS
1910 # ifdef USE_LARGE_FILES
1913 # ifdef USE_LONG_DOUBLE
1919 # ifdef USE_REENTRANT_API
1920 " USE_REENTRANT_API"
1925 # ifdef USE_SITECUSTOMIZE
1926 " USE_SITECUSTOMIZE"
1933 while (SvCUR(opts_prog) > opts+76) {
1934 /* find last space after "options: " and before col 76
1938 char * const pv = SvPV_nolen(opts_prog);
1939 const char c = pv[opts+76];
1941 space = strrchr(pv+opts+26, ' ');
1943 if (!space) break; /* "Can't happen" */
1945 /* break the line before that space */
1948 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1949 STR_WITH_LEN("\\n "));
1952 sv_catpvs(opts_prog,"\\n\",");
1954 #if defined(LOCAL_PATCH_COUNT)
1955 if (LOCAL_PATCH_COUNT > 0) {
1957 sv_catpvs(opts_prog,
1958 "\" Locally applied patches:\\n\",");
1959 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1960 if (PL_localpatches[i])
1961 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1962 0, PL_localpatches[i], 0);
1966 Perl_sv_catpvf(aTHX_ opts_prog,
1967 "\" Built under %s\\n\"",OSNAME);
1970 Perl_sv_catpvf(aTHX_ opts_prog,
1971 ",\" Compiled at %s %s\\n\"",__DATE__,
1974 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1978 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1979 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1980 "sort grep {/^PERL/} keys %ENV; ");
1982 sv_catpvs(opts_prog,
1983 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1985 sv_catpvs(opts_prog,
1986 "print \" \\%ENV:\\n @env\\n\" if @env;"
1987 "print \" \\@INC:\\n @INC\\n\";");
1991 opts_prog = Perl_newSVpvf(aTHX_
1992 "Config::config_vars(qw%c%s%c)",
1996 av_push(PL_preambleav, opts_prog);
1997 /* don't look for script or read stdin */
1998 scriptname = BIT_BUCKET;
2002 PL_doextract = TRUE;
2010 if (!*++s || isSPACE(*s)) {
2014 /* catch use of gnu style long options */
2015 if (strEQ(s, "version")) {
2019 if (strEQ(s, "help")) {
2026 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2032 #ifndef SECURE_INTERNAL_GETENV
2035 (s = PerlEnv_getenv("PERL5OPT")))
2037 const char *popt = s;
2040 if (*s == '-' && *(s+1) == 'T') {
2041 CHECK_MALLOC_TOO_LATE_FOR('T');
2043 PL_taint_warn = FALSE;
2046 char *popt_copy = NULL;
2059 if (!strchr("CDIMUdmtwA", *s))
2060 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2064 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2065 s = popt_copy + (s - popt);
2066 d = popt_copy + (d - popt);
2073 if( !PL_tainting ) {
2074 PL_taint_warn = TRUE;
2084 #ifdef USE_SITECUSTOMIZE
2086 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2087 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2092 scriptname = argv[0];
2095 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2097 else if (scriptname == NULL) {
2099 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2105 /* Set $^X early so that it can be used for relocatable paths in @INC */
2106 assert (!PL_tainted);
2108 S_set_caret_X(aTHX);
2115 = open_script(scriptname, dosearch, sv, &suidscript);
2117 validate_suid(validarg, scriptname, fdscript, suidscript);
2120 # if defined(SIGCHLD) || defined(SIGCLD)
2123 # define SIGCHLD SIGCLD
2125 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2126 if (sigstate == (Sighandler_t) SIG_IGN) {
2127 if (ckWARN(WARN_SIGNAL))
2128 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2129 "Can't ignore signal CHLD, forcing to default");
2130 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2137 #ifdef MACOS_TRADITIONAL
2138 || gMacPerl_AlwaysExtract
2142 /* This will croak if suidscript is >= 0, as -x cannot be used with
2144 forbid_setid('x', suidscript);
2145 /* Hence you can't get here if suidscript >= 0 */
2148 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2149 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2153 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2154 CvUNIQUE_on(PL_compcv);
2156 CvPADLIST(PL_compcv) = pad_new(0);
2159 boot_core_UNIVERSAL();
2160 boot_core_xsutils();
2164 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2166 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2172 # ifdef HAS_SOCKS5_INIT
2173 socks5_init(argv[0]);
2179 init_predump_symbols();
2180 /* init_postdump_symbols not currently designed to be called */
2181 /* more than once (ENV isn't cleared first, for example) */
2182 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2184 init_postdump_symbols(argc,argv,env);
2186 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2187 * or explicitly in some platforms.
2188 * locale.c:Perl_init_i18nl10n() if the environment
2189 * look like the user wants to use UTF-8. */
2190 #if defined(__SYMBIAN32__)
2191 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2194 /* Requires init_predump_symbols(). */
2195 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2200 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2201 * and the default open disciplines. */
2202 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2203 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2205 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2206 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2207 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2211 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2213 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2214 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2215 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2217 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2218 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2221 sv_setpvn(sv, ":utf8\0:utf8", 11);
2223 sv_setpvn(sv, ":utf8\0", 6);
2226 sv_setpvn(sv, "\0:utf8", 6);
2232 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2233 if (strEQ(s, "unsafe"))
2234 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2235 else if (strEQ(s, "safe"))
2236 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2238 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2242 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2246 PL_xmlfp = PerlIO_stdout();
2248 PL_xmlfp = PerlIO_open(s, "w");
2250 Perl_croak(aTHX_ "Can't open %s", s);
2252 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2254 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2255 PL_madskills = atoi(s);
2256 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2262 /* now parse the script */
2264 SETERRNO(0,SS_NORMAL);
2266 #ifdef MACOS_TRADITIONAL
2267 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2269 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2271 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2272 MacPerl_MPWFileName(PL_origfilename));
2276 if (yyparse() || PL_error_count) {
2278 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2280 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2285 CopLINE_set(PL_curcop, 0);
2286 PL_curstash = PL_defstash;
2287 PL_preprocess = FALSE;
2289 SvREFCNT_dec(PL_e_script);
2297 SAVECOPFILE(PL_curcop);
2298 SAVECOPLINE(PL_curcop);
2299 gv_check(PL_defstash);
2306 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2307 dump_mstats("after compilation:");
2316 =for apidoc perl_run
2318 Tells a Perl interpreter to run. See L<perlembed>.
2331 PERL_UNUSED_ARG(my_perl);
2333 oldscope = PL_scopestack_ix;
2341 cxstack_ix = -1; /* start context stack again */
2343 case 0: /* normal completion */
2347 case 2: /* my_exit() */
2348 while (PL_scopestack_ix > oldscope)
2351 PL_curstash = PL_defstash;
2352 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2353 PL_endav && !PL_minus_c)
2354 call_list(oldscope, PL_endav);
2356 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2357 dump_mstats("after execution: ");
2363 POPSTACK_TO(PL_mainstack);
2366 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2377 S_run_body(pTHX_ I32 oldscope)
2380 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2381 PL_sawampersand ? "Enabling" : "Omitting"));
2383 if (!PL_restartop) {
2387 exit(0); /* less likely to core dump than my_exit(0) */
2390 DEBUG_x(dump_all());
2393 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2395 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2399 #ifdef MACOS_TRADITIONAL
2400 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2401 (gMacPerl_ErrorFormat ? "# " : ""),
2402 MacPerl_MPWFileName(PL_origfilename));
2404 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2408 if (PERLDB_SINGLE && PL_DBsingle)
2409 sv_setiv(PL_DBsingle, 1);
2411 call_list(oldscope, PL_initav);
2412 #ifdef PERL_DEBUG_READONLY_OPS
2413 Perl_pending_Slabs_to_ro(aTHX);
2420 PL_op = PL_restartop;
2424 else if (PL_main_start) {
2425 CvDEPTH(PL_main_cv) = 1;
2426 PL_op = PL_main_start;
2434 =head1 SV Manipulation Functions
2436 =for apidoc p||get_sv
2438 Returns the SV of the specified Perl scalar. If C<create> is set and the
2439 Perl variable does not exist then it will be created. If C<create> is not
2440 set and the variable does not exist then NULL is returned.
2446 Perl_get_sv(pTHX_ const char *name, I32 create)
2449 gv = gv_fetchpv(name, create, SVt_PV);
2456 =head1 Array Manipulation Functions
2458 =for apidoc p||get_av
2460 Returns the AV of the specified Perl array. If C<create> is set and the
2461 Perl variable does not exist then it will be created. If C<create> is not
2462 set and the variable does not exist then NULL is returned.
2468 Perl_get_av(pTHX_ const char *name, I32 create)
2470 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2479 =head1 Hash Manipulation Functions
2481 =for apidoc p||get_hv
2483 Returns the HV of the specified Perl hash. If C<create> is set and the
2484 Perl variable does not exist then it will be created. If C<create> is not
2485 set and the variable does not exist then NULL is returned.
2491 Perl_get_hv(pTHX_ const char *name, I32 create)
2493 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2502 =head1 CV Manipulation Functions
2504 =for apidoc p||get_cvn_flags
2506 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2507 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2508 exist then it will be declared (which has the same effect as saying
2509 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2510 then NULL is returned.
2512 =for apidoc p||get_cv
2514 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2520 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2522 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2523 /* XXX this is probably not what they think they're getting.
2524 * It has the same effect as "sub name;", i.e. just a forward
2526 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2527 SV *const sv = newSVpvn(name,len);
2528 SvFLAGS(sv) |= flags & SVf_UTF8;
2529 return newSUB(start_subparse(FALSE, 0),
2530 newSVOP(OP_CONST, 0, sv),
2539 Perl_get_cv(pTHX_ const char *name, I32 flags)
2541 return get_cvn_flags(name, strlen(name), flags);
2544 /* Be sure to refetch the stack pointer after calling these routines. */
2548 =head1 Callback Functions
2550 =for apidoc p||call_argv
2552 Performs a callback to the specified Perl sub. See L<perlcall>.
2558 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2560 /* See G_* flags in cop.h */
2561 /* null terminated arg list */
2569 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2574 return call_pv(sub_name, flags);
2578 =for apidoc p||call_pv
2580 Performs a callback to the specified Perl sub. See L<perlcall>.
2586 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2587 /* name of the subroutine */
2588 /* See G_* flags in cop.h */
2590 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2594 =for apidoc p||call_method
2596 Performs a callback to the specified Perl method. The blessed object must
2597 be on the stack. See L<perlcall>.
2603 Perl_call_method(pTHX_ const char *methname, I32 flags)
2604 /* name of the subroutine */
2605 /* See G_* flags in cop.h */
2607 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2610 /* May be called with any of a CV, a GV, or an SV containing the name. */
2612 =for apidoc p||call_sv
2614 Performs a callback to the Perl sub whose name is in the SV. See
2621 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2622 /* See G_* flags in cop.h */
2625 LOGOP myop; /* fake syntax tree node */
2630 bool oldcatch = CATCH_GET;
2632 OP* const oldop = PL_op;
2635 if (flags & G_DISCARD) {
2640 Zero(&myop, 1, LOGOP);
2641 myop.op_next = NULL;
2642 if (!(flags & G_NOARGS))
2643 myop.op_flags |= OPf_STACKED;
2644 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2645 (flags & G_ARRAY) ? OPf_WANT_LIST :
2650 EXTEND(PL_stack_sp, 1);
2651 *++PL_stack_sp = sv;
2653 oldscope = PL_scopestack_ix;
2655 if (PERLDB_SUB && PL_curstash != PL_debstash
2656 /* Handle first BEGIN of -d. */
2657 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2658 /* Try harder, since this may have been a sighandler, thus
2659 * curstash may be meaningless. */
2660 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2661 && !(flags & G_NODEBUG))
2662 PL_op->op_private |= OPpENTERSUB_DB;
2664 if (flags & G_METHOD) {
2665 Zero(&method_op, 1, UNOP);
2666 method_op.op_next = PL_op;
2667 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2668 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2669 PL_op = (OP*)&method_op;
2672 if (!(flags & G_EVAL)) {
2674 CALL_BODY_SUB((OP*)&myop);
2675 retval = PL_stack_sp - (PL_stack_base + oldmark);
2676 CATCH_SET(oldcatch);
2679 myop.op_other = (OP*)&myop;
2681 create_eval_scope(flags|G_FAKINGEVAL);
2689 CALL_BODY_SUB((OP*)&myop);
2690 retval = PL_stack_sp - (PL_stack_base + oldmark);
2691 if (!(flags & G_KEEPERR))
2692 sv_setpvn(ERRSV,"",0);
2698 /* my_exit() was called */
2699 PL_curstash = PL_defstash;
2702 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2703 Perl_croak(aTHX_ "Callback called exit");
2708 PL_op = PL_restartop;
2712 PL_stack_sp = PL_stack_base + oldmark;
2713 if (flags & G_ARRAY)
2717 *++PL_stack_sp = &PL_sv_undef;
2722 if (PL_scopestack_ix > oldscope)
2723 delete_eval_scope();
2727 if (flags & G_DISCARD) {
2728 PL_stack_sp = PL_stack_base + oldmark;
2737 /* Eval a string. The G_EVAL flag is always assumed. */
2740 =for apidoc p||eval_sv
2742 Tells Perl to C<eval> the string in the SV.
2748 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2750 /* See G_* flags in cop.h */
2754 UNOP myop; /* fake syntax tree node */
2755 VOL I32 oldmark = SP - PL_stack_base;
2758 OP* const oldop = PL_op;
2761 if (flags & G_DISCARD) {
2768 Zero(PL_op, 1, UNOP);
2769 EXTEND(PL_stack_sp, 1);
2770 *++PL_stack_sp = sv;
2772 if (!(flags & G_NOARGS))
2773 myop.op_flags = OPf_STACKED;
2774 myop.op_next = NULL;
2775 myop.op_type = OP_ENTEREVAL;
2776 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2777 (flags & G_ARRAY) ? OPf_WANT_LIST :
2779 if (flags & G_KEEPERR)
2780 myop.op_flags |= OPf_SPECIAL;
2782 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2783 * before a PUSHEVAL, which corrupts the stack after a croak */
2784 TAINT_PROPER("eval_sv()");
2790 CALL_BODY_EVAL((OP*)&myop);
2791 retval = PL_stack_sp - (PL_stack_base + oldmark);
2792 if (!(flags & G_KEEPERR))
2793 sv_setpvn(ERRSV,"",0);
2799 /* my_exit() was called */
2800 PL_curstash = PL_defstash;
2803 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2804 Perl_croak(aTHX_ "Callback called exit");
2809 PL_op = PL_restartop;
2813 PL_stack_sp = PL_stack_base + oldmark;
2814 if (flags & G_ARRAY)
2818 *++PL_stack_sp = &PL_sv_undef;
2824 if (flags & G_DISCARD) {
2825 PL_stack_sp = PL_stack_base + oldmark;
2835 =for apidoc p||eval_pv
2837 Tells Perl to C<eval> the given string and return an SV* result.
2843 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2847 SV* sv = newSVpv(p, 0);
2849 eval_sv(sv, G_SCALAR);
2856 if (croak_on_error && SvTRUE(ERRSV)) {
2857 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2863 /* Require a module. */
2866 =head1 Embedding Functions
2868 =for apidoc p||require_pv
2870 Tells Perl to C<require> the file named by the string argument. It is
2871 analogous to the Perl code C<eval "require '$file'">. It's even
2872 implemented that way; consider using load_module instead.
2877 Perl_require_pv(pTHX_ const char *pv)
2882 PUSHSTACKi(PERLSI_REQUIRE);
2884 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2885 eval_sv(sv_2mortal(sv), G_DISCARD);
2891 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2893 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2896 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2900 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2902 /* This message really ought to be max 23 lines.
2903 * Removed -h because the user already knows that option. Others? */
2905 static const char * const usage_msg[] = {
2906 "-0[octal] specify record separator (\\0, if no argument)",
2907 "-A[mod][=pattern] activate all/given assertions",
2908 "-a autosplit mode with -n or -p (splits $_ into @F)",
2909 "-C[number/list] enables the listed Unicode features",
2910 "-c check syntax only (runs BEGIN and CHECK blocks)",
2911 "-d[:debugger] run program under debugger",
2912 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2913 "-e program one line of program (several -e's allowed, omit programfile)",
2914 "-E program like -e, but enables all optional features",
2915 "-f don't do $sitelib/sitecustomize.pl at startup",
2916 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2917 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2918 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2919 "-l[octal] enable line ending processing, specifies line terminator",
2920 "-[mM][-]module execute \"use/no module...\" before executing program",
2921 "-n assume \"while (<>) { ... }\" loop around program",
2922 "-p assume loop like -n but print line also, like sed",
2923 "-P run program through C preprocessor before compilation",
2924 "-s enable rudimentary parsing for switches after programfile",
2925 "-S look for programfile using PATH environment variable",
2926 "-t enable tainting warnings",
2927 "-T enable tainting checks",
2928 "-u dump core after parsing program",
2929 "-U allow unsafe operations",
2930 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2931 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2932 "-w enable many useful warnings (RECOMMENDED)",
2933 "-W enable all warnings",
2934 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2935 "-X disable all warnings",
2939 const char * const *p = usage_msg;
2941 PerlIO_printf(PerlIO_stdout(),
2942 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2945 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2948 /* convert a string of -D options (or digits) into an int.
2949 * sets *s to point to the char after the options */
2953 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2955 static const char * const usage_msgd[] = {
2956 " Debugging flag values: (see also -d)",
2957 " p Tokenizing and parsing (with v, displays parse stack)",
2958 " s Stack snapshots (with v, displays all stacks)",
2959 " l Context (loop) stack processing",
2960 " t Trace execution",
2961 " o Method and overloading resolution",
2962 " c String/numeric conversions",
2963 " P Print profiling info, preprocessor command for -P, source file input state",
2964 " m Memory allocation",
2965 " f Format processing",
2966 " r Regular expression parsing and execution",
2967 " x Syntax tree dump",
2968 " u Tainting checks",
2969 " H Hash dump -- usurps values()",
2970 " X Scratchpad allocation",
2972 " S Thread synchronization",
2974 " R Include reference counts of dumped variables (eg when using -Ds)",
2975 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2976 " v Verbose: use in conjunction with other flags",
2978 " A Consistency checks on internal structures",
2979 " q quiet - currently only suppresses the 'EXECUTING' message",
2984 /* if adding extra options, remember to update DEBUG_MASK */
2985 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2987 for (; isALNUM(**s); (*s)++) {
2988 const char * const d = strchr(debopts,**s);
2990 i |= 1 << (d - debopts);
2991 else if (ckWARN_d(WARN_DEBUGGING))
2992 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2993 "invalid option -D%c, use -D'' to see choices\n", **s);
2996 else if (isDIGIT(**s)) {
2998 for (; isALNUM(**s); (*s)++) ;
3000 else if (givehelp) {
3001 const char *const *p = usage_msgd;
3002 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3005 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3006 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3007 "-Dp not implemented on this platform\n");
3013 /* This routine handles any switches that can be given during run */
3016 Perl_moreswitches(pTHX_ char *s)
3027 SvREFCNT_dec(PL_rs);
3028 if (s[1] == 'x' && s[2]) {
3029 const char *e = s+=2;
3035 flags = PERL_SCAN_SILENT_ILLDIGIT;
3036 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3037 if (s + numlen < e) {
3038 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3042 PL_rs = newSVpvs("");
3043 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3044 tmps = (U8*)SvPVX(PL_rs);
3045 uvchr_to_utf8(tmps, rschar);
3046 SvCUR_set(PL_rs, UNISKIP(rschar));
3051 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3052 if (rschar & ~((U8)~0))
3053 PL_rs = &PL_sv_undef;
3054 else if (!rschar && numlen >= 2)
3055 PL_rs = newSVpvs("");
3057 char ch = (char)rschar;
3058 PL_rs = newSVpvn(&ch, 1);
3061 sv_setsv(get_sv("/", TRUE), PL_rs);
3066 PL_unicode = parse_unicode_opts( (const char **)&s );
3067 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3073 while (*s && !isSPACE(*s)) ++s;
3074 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3085 forbid_setid('d', -1);
3088 /* -dt indicates to the debugger that threads will be used */
3089 if (*s == 't' && !isALNUM(s[1])) {
3091 my_setenv("PERL5DB_THREADED", "1");
3094 /* The following permits -d:Mod to accepts arguments following an =
3095 in the fashion that -MSome::Mod does. */
3096 if (*s == ':' || *s == '=') {
3098 SV * const sv = newSVpvs("use Devel::");
3100 /* We now allow -d:Module=Foo,Bar */
3101 while(isALNUM(*s) || *s==':') ++s;
3103 sv_catpv(sv, start);
3105 sv_catpvn(sv, start, s-start);
3106 /* Don't use NUL as q// delimiter here, this string goes in the
3108 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3111 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3114 PL_perldb = PERLDB_ALL;
3121 forbid_setid('D', -1);
3123 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3124 #else /* !DEBUGGING */
3125 if (ckWARN_d(WARN_DEBUGGING))
3126 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3127 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3128 for (s++; isALNUM(*s); s++) ;
3133 usage(PL_origargv[0]);
3136 Safefree(PL_inplace);
3137 #if defined(__CYGWIN__) /* do backup extension automagically */
3138 if (*(s+1) == '\0') {
3139 PL_inplace = savepvs(".bak");
3142 #endif /* __CYGWIN__ */
3144 const char * const start = ++s;
3145 while (*s && !isSPACE(*s))
3148 PL_inplace = savepvn(start, s - start);
3152 if (*s == '-') /* Additional switches on #! line. */
3156 case 'I': /* -I handled both here and in parse_body() */
3157 forbid_setid('I', -1);
3159 while (*s && isSPACE(*s))
3164 /* ignore trailing spaces (possibly followed by other switches) */
3166 for (e = p; *e && !isSPACE(*e); e++) ;
3170 } while (*p && *p != '-');
3171 e = savepvn(s, e-s);
3172 incpush(e, TRUE, TRUE, FALSE, FALSE);
3179 Perl_croak(aTHX_ "No directory specified for -I");
3185 SvREFCNT_dec(PL_ors_sv);
3191 PL_ors_sv = newSVpvs("\n");
3192 numlen = 3 + (*s == '0');
3193 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3197 if (RsPARA(PL_rs)) {
3198 PL_ors_sv = newSVpvs("\n\n");
3201 PL_ors_sv = newSVsv(PL_rs);
3206 forbid_setid('A', -1);
3209 char * const start = s;
3210 SV * const sv = newSVpvs("use assertions::activate");
3211 while(isALNUM(*s) || *s == ':') ++s;
3213 sv_catpvs(sv, "::");
3214 sv_catpvn(sv, start, s-start);
3217 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3220 else if (*s != '\0') {
3221 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3223 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3227 forbid_setid('M', -1); /* XXX ? */
3230 forbid_setid('m', -1); /* XXX ? */
3234 const char *use = "use ";
3235 /* -M-foo == 'no foo' */
3236 /* Leading space on " no " is deliberate, to make both
3237 possibilities the same length. */
3238 if (*s == '-') { use = " no "; ++s; }
3239 sv = newSVpvn(use,4);
3241 /* We allow -M'Module qw(Foo Bar)' */
3242 while(isALNUM(*s) || *s==':') ++s;
3244 sv_catpv(sv, start);
3245 if (*(start-1) == 'm') {
3247 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3248 sv_catpvs( sv, " ()");
3252 Perl_croak(aTHX_ "Module name required with -%c option",
3254 sv_catpvn(sv, start, s-start);
3255 sv_catpvs(sv, " split(/,/,q");
3256 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3258 sv_catpvs(sv, "\0)");
3261 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3264 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3275 forbid_setid('s', -1);
3276 PL_doswitches = TRUE;
3290 #ifdef MACOS_TRADITIONAL
3291 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3293 PL_do_undump = TRUE;
3301 if (!sv_derived_from(PL_patchlevel, "version"))
3302 upg_version(PL_patchlevel, TRUE);
3304 PerlIO_printf(PerlIO_stdout(),
3305 Perl_form(aTHX_ "\nThis is perl, %"SVf
3306 #ifdef PERL_PATCHNUM
3307 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3310 SVfARG(vstringify(PL_patchlevel)),
3313 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3314 PerlIO_printf(PerlIO_stdout(),
3315 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3316 SVfARG(vstringify(PL_patchlevel))));
3317 PerlIO_printf(PerlIO_stdout(),
3318 Perl_form(aTHX_ " built under %s at %s %s\n",
3319 OSNAME, __DATE__, __TIME__));
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ " OS Specific Release: %s\n",
3325 #if defined(LOCAL_PATCH_COUNT)
3326 if (LOCAL_PATCH_COUNT > 0)
3327 PerlIO_printf(PerlIO_stdout(),
3328 "\n(with %d registered patch%s, "
3329 "see perl -V for more detail)",
3331 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3334 PerlIO_printf(PerlIO_stdout(),
3335 "\n\nCopyright 1987-2007, Larry Wall\n");
3336 #ifdef MACOS_TRADITIONAL
3337 PerlIO_printf(PerlIO_stdout(),
3338 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3339 "maintained by Chris Nandor\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3348 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3353 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "atariST series port, ++jrb bammi@cadence.com\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "MiNT port by Guido Flohr, 1997-1999\n");
3388 PerlIO_printf(PerlIO_stdout(),
3389 "EPOC port by Olaf Flebbe, 1999-2002\n");
3392 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3393 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3396 #ifdef __SYMBIAN32__
3397 PerlIO_printf(PerlIO_stdout(),
3398 "Symbian port by Nokia, 2004-2005\n");
3400 #ifdef BINARY_BUILD_NOTICE
3401 BINARY_BUILD_NOTICE;
3403 PerlIO_printf(PerlIO_stdout(),
3405 Perl may be copied only under the terms of either the Artistic License or the\n\
3406 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3407 Complete documentation for Perl, including FAQ lists, should be found on\n\
3408 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3409 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3412 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3413 PL_dowarn |= G_WARN_ON;
3418 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3419 if (!specialWARN(PL_compiling.cop_warnings))
3420 PerlMemShared_free(PL_compiling.cop_warnings);
3421 PL_compiling.cop_warnings = pWARN_ALL ;
3425 PL_dowarn = G_WARN_ALL_OFF;
3426 if (!specialWARN(PL_compiling.cop_warnings))
3427 PerlMemShared_free(PL_compiling.cop_warnings);
3428 PL_compiling.cop_warnings = pWARN_NONE ;
3433 if (s[1] == '-') /* Additional switches on #! line. */
3438 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3444 #ifdef ALTERNATE_SHEBANG
3445 case 'S': /* OS/2 needs -S on "extproc" line. */
3453 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3458 /* compliments of Tom Christiansen */
3460 /* unexec() can be found in the Gnu emacs distribution */
3461 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3464 Perl_my_unexec(pTHX)
3466 PERL_UNUSED_CONTEXT;
3468 SV * prog = newSVpv(BIN_EXP, 0);
3469 SV * file = newSVpv(PL_origfilename, 0);
3473 sv_catpvs(prog, "/perl");
3474 sv_catpvs(file, ".perldump");
3476 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3477 /* unexec prints msg to stderr in case of failure */
3478 PerlProc_exit(status);
3481 # include <lib$routines.h>
3482 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3483 # elif defined(WIN32) || defined(__CYGWIN__)
3484 Perl_croak(aTHX_ "dump is not supported");
3486 ABORT(); /* for use with undump */
3491 /* initialize curinterp */
3497 # define PERLVAR(var,type)
3498 # define PERLVARA(var,n,type)
3499 # if defined(PERL_IMPLICIT_CONTEXT)
3500 # define PERLVARI(var,type,init) aTHX->var = init;
3501 # define PERLVARIC(var,type,init) aTHX->var = init;
3503 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3504 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3506 # include "intrpvar.h"
3507 # include "thrdvar.h"
3513 # define PERLVAR(var,type)
3514 # define PERLVARA(var,n,type)
3515 # define PERLVARI(var,type,init) PL_##var = init;
3516 # define PERLVARIC(var,type,init) PL_##var = init;
3517 # include "intrpvar.h"
3518 # include "thrdvar.h"
3525 /* As these are inside a structure, PERLVARI isn't capable of initialising
3527 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3528 PL_reg_poscache = PL_reg_starttry = NULL;
3532 S_init_main_stash(pTHX)
3537 PL_curstash = PL_defstash = newHV();
3538 /* We know that the string "main" will be in the global shared string
3539 table, so it's a small saving to use it rather than allocate another
3541 PL_curstname = newSVpvs_share("main");
3542 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3543 /* If we hadn't caused another reference to "main" to be in the shared
3544 string table above, then it would be worth reordering these two,
3545 because otherwise all we do is delete "main" from it as a consequence
3546 of the SvREFCNT_dec, only to add it again with hv_name_set */
3547 SvREFCNT_dec(GvHV(gv));
3548 hv_name_set(PL_defstash, "main", 4, 0);
3549 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3551 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3553 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3554 GvMULTI_on(PL_incgv);
3555 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3556 GvMULTI_on(PL_hintgv);
3557 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3558 SvREFCNT_inc_simple_void(PL_defgv);
3559 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3560 SvREFCNT_inc_simple_void(PL_errgv);
3561 GvMULTI_on(PL_errgv);
3562 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3563 GvMULTI_on(PL_replgv);
3564 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3565 #ifdef PERL_DONT_CREATE_GVSV
3568 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3569 sv_setpvn(ERRSV, "", 0);
3570 PL_curstash = PL_defstash;
3571 CopSTASH_set(&PL_compiling, PL_defstash);
3572 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3573 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3575 /* We must init $/ before switches are processed. */
3576 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3580 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3586 const char *cpp_discard_flag;
3595 PL_origfilename = savepvs("-e");
3598 /* if find_script() returns, it returns a malloc()-ed value */
3599 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3601 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3602 const char *s = scriptname + 8;
3608 * Tell apart "normal" usage of fdscript, e.g.
3609 * with bash on FreeBSD:
3610 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3611 * from usage in suidperl.
3612 * Does any "normal" usage leave garbage after the number???
3613 * Is it a mistake to use a similar /dev/fd/ construct for
3618 * Be supersafe and do some sanity-checks.
3619 * Still, can we be sure we got the right thing?
3622 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3625 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3627 scriptname = savepv(s + 1);
3628 Safefree(PL_origfilename);
3629 PL_origfilename = (char *)scriptname;
3634 CopFILE_free(PL_curcop);
3635 CopFILE_set(PL_curcop, PL_origfilename);
3636 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3637 scriptname = (char *)"";
3638 if (fdscript >= 0) {
3639 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3640 # if defined(HAS_FCNTL) && defined(F_SETFD)
3642 /* ensure close-on-exec */
3643 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3648 Perl_croak(aTHX_ "sperl needs fd script\n"
3649 "You should not call sperl directly; do you need to "
3650 "change a #! line\nfrom sperl to perl?\n");
3653 * Do not open (or do other fancy stuff) while setuid.
3654 * Perl does the open, and hands script to suidperl on a fd;
3655 * suidperl only does some checks, sets up UIDs and re-execs
3656 * perl with that fd as it has always done.
3659 if (*suidscript != 1) {
3660 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3663 else if (PL_preprocess) {
3664 const char * const cpp_cfg = CPPSTDIN;
3665 SV * const cpp = newSVpvs("");
3666 SV * const cmd = newSV(0);
3668 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3669 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3670 if (strEQ(cpp_cfg, "cppstdin"))
3671 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3672 sv_catpv(cpp, cpp_cfg);
3675 sv_catpvs(sv, "-I");
3676 sv_catpv(sv,PRIVLIB_EXP);
3679 DEBUG_P(PerlIO_printf(Perl_debug_log,
3680 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3681 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3684 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3691 cpp_discard_flag = "";
3693 cpp_discard_flag = "-C";
3697 perl = os2_execname(aTHX);
3699 perl = PL_origargv[0];
3703 /* This strips off Perl comments which might interfere with
3704 the C pre-processor, including #!. #line directives are
3705 deliberately stripped to avoid confusion with Perl's version
3706 of #line. FWP played some golf with it so it will fit
3707 into VMS's 255 character buffer.
3710 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3712 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3714 Perl_sv_setpvf(aTHX_ cmd, "\
3715 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3716 perl, quote, code, quote, scriptname, SVfARG(cpp),
3717 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3719 PL_doextract = FALSE;
3721 DEBUG_P(PerlIO_printf(Perl_debug_log,
3722 "PL_preprocess: cmd=\"%s\"\n",
3725 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3729 else if (!*scriptname) {
3730 forbid_setid(0, *suidscript);
3731 PL_rsfp = PerlIO_stdin();
3734 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3735 # if defined(HAS_FCNTL) && defined(F_SETFD)
3737 /* ensure close-on-exec */
3738 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3741 #endif /* IAMSUID */
3743 /* PSz 16 Sep 03 Keep neat error message */
3745 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3747 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3748 CopFILE(PL_curcop), Strerror(errno));
3754 * I_SYSSTATVFS HAS_FSTATVFS
3756 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3757 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3758 * here so that metaconfig picks them up. */
3762 S_fd_on_nosuid_fs(pTHX_ int fd)
3765 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3766 * but is needed also on machines without setreuid.
3767 * Seems safe enough to run as root.
3769 int check_okay = 0; /* able to do all the required sys/libcalls */
3770 int on_nosuid = 0; /* the fd is on a nosuid fs */
3772 * Need to check noexec also: nosuid might not be set, the average
3773 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3775 int on_noexec = 0; /* the fd is on a noexec fs */
3778 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3779 * fstatvfs() is UNIX98.
3780 * fstatfs() is 4.3 BSD.
3781 * ustat()+getmnt() is pre-4.3 BSD.
3782 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3783 * an irrelevant filesystem while trying to reach the right one.
3786 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3788 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3789 defined(HAS_FSTATVFS)
3790 # define FD_ON_NOSUID_CHECK_OKAY
3791 struct statvfs stfs;
3793 check_okay = fstatvfs(fd, &stfs) == 0;
3794 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3796 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3797 on platforms where it is present. */
3798 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3800 # endif /* fstatvfs */
3802 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3803 defined(PERL_MOUNT_NOSUID) && \
3804 defined(PERL_MOUNT_NOEXEC) && \
3805 defined(HAS_FSTATFS) && \
3806 defined(HAS_STRUCT_STATFS) && \
3807 defined(HAS_STRUCT_STATFS_F_FLAGS)
3808 # define FD_ON_NOSUID_CHECK_OKAY
3811 check_okay = fstatfs(fd, &stfs) == 0;
3812 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3813 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3814 # endif /* fstatfs */
3816 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3817 defined(PERL_MOUNT_NOSUID) && \
3818 defined(PERL_MOUNT_NOEXEC) && \
3819 defined(HAS_FSTAT) && \
3820 defined(HAS_USTAT) && \
3821 defined(HAS_GETMNT) && \
3822 defined(HAS_STRUCT_FS_DATA) && \
3824 # define FD_ON_NOSUID_CHECK_OKAY
3827 if (fstat(fd, &fdst) == 0) {
3829 if (ustat(fdst.st_dev, &us) == 0) {
3831 /* NOSTAT_ONE here because we're not examining fields which
3832 * vary between that case and STAT_ONE. */
3833 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3834 size_t cmplen = sizeof(us.f_fname);
3835 if (sizeof(fsd.fd_req.path) < cmplen)
3836 cmplen = sizeof(fsd.fd_req.path);
3837 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3838 fdst.st_dev == fsd.fd_req.dev) {
3840 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3841 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3846 # endif /* fstat+ustat+getmnt */
3848 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3849 defined(HAS_GETMNTENT) && \
3850 defined(HAS_HASMNTOPT) && \
3851 defined(MNTOPT_NOSUID) && \
3852 defined(MNTOPT_NOEXEC)
3853 # define FD_ON_NOSUID_CHECK_OKAY
3854 FILE *mtab = fopen("/etc/mtab", "r");
3855 struct mntent *entry;
3858 if (mtab && (fstat(fd, &stb) == 0)) {
3859 while (entry = getmntent(mtab)) {
3860 if (stat(entry->mnt_dir, &fsb) == 0
3861 && fsb.st_dev == stb.st_dev)
3863 /* found the filesystem */
3865 if (hasmntopt(entry, MNTOPT_NOSUID))
3867 if (hasmntopt(entry, MNTOPT_NOEXEC))
3870 } /* A single fs may well fail its stat(). */
3875 # endif /* getmntent+hasmntopt */
3878 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3880 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3882 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3883 return ((!check_okay) || on_nosuid || on_noexec);
3885 #endif /* IAMSUID */
3888 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3889 int fdscript, int suidscript)
3894 #endif /* IAMSUID */
3896 /* do we need to emulate setuid on scripts? */
3898 /* This code is for those BSD systems that have setuid #! scripts disabled
3899 * in the kernel because of a security problem. Merely defining DOSUID
3900 * in perl will not fix that problem, but if you have disabled setuid
3901 * scripts in the kernel, this will attempt to emulate setuid and setgid
3902 * on scripts that have those now-otherwise-useless bits set. The setuid
3903 * root version must be called suidperl or sperlN.NNN. If regular perl
3904 * discovers that it has opened a setuid script, it calls suidperl with
3905 * the same argv that it had. If suidperl finds that the script it has
3906 * just opened is NOT setuid root, it sets the effective uid back to the
3907 * uid. We don't just make perl setuid root because that loses the
3908 * effective uid we had before invoking perl, if it was different from the
3911 * Description/comments above do not match current workings:
3912 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3913 * suidperl called with script open and name changed to /dev/fd/N/X;
3914 * suidperl croaks if script is not setuid;
3915 * making perl setuid would be a huge security risk (and yes, that
3916 * would lose any euid we might have had).
3918 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3919 * be defined in suidperl only. suidperl must be setuid root. The
3920 * Configure script will set this up for you if you want it.
3926 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3927 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3928 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3930 const char *linestr;
3934 if (fdscript < 0 || suidscript != 1)
3935 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3937 * Since the script is opened by perl, not suidperl, some of these
3938 * checks are superfluous. Leaving them in probably does not lower
3942 * Do checks even for systems with no HAS_SETREUID.
3943 * We used to swap, then re-swap UIDs with
3945 if (setreuid(PL_euid,PL_uid) < 0
3946 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3947 Perl_croak(aTHX_ "Can't swap uid and euid");
3950 if (setreuid(PL_uid,PL_euid) < 0
3951 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3952 Perl_croak(aTHX_ "Can't reswap uid and euid");
3956 /* On this access check to make sure the directories are readable,
3957 * there is actually a small window that the user could use to make
3958 * filename point to an accessible directory. So there is a faint
3959 * chance that someone could execute a setuid script down in a
3960 * non-accessible directory. I don't know what to do about that.
3961 * But I don't think it's too important. The manual lies when
3962 * it says access() is useful in setuid programs.
3964 * So, access() is pretty useless... but not harmful... do anyway.
3966 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3967 Perl_croak(aTHX_ "Can't access() script\n");
3970 /* If we can swap euid and uid, then we can determine access rights
3971 * with a simple stat of the file, and then compare device and
3972 * inode to make sure we did stat() on the same file we opened.
3973 * Then we just have to make sure he or she can execute it.
3976 * As the script is opened by perl, not suidperl, we do not need to
3977 * care much about access rights.
3979 * The 'script changed' check is needed, or we can get lied to
3980 * about $0 with e.g.
3981 * suidperl /dev/fd/4//bin/x 4<setuidscript
3982 * Without HAS_SETREUID, is it safe to stat() as root?
3984 * Are there any operating systems that pass /dev/fd/xxx for setuid
3985 * scripts, as suggested/described in perlsec(1)? Surely they do not
3986 * pass the script name as we do, so the "script changed" test would
3987 * fail for them... but we never get here with
3988 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3990 * This is one place where we must "lie" about return status: not
3991 * say if the stat() failed. We are doing this as root, and could
3992 * be tricked into reporting existence or not of files that the
3993 * "plain" user cannot even see.
3997 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3998 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3999 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4000 Perl_croak(aTHX_ "Setuid script changed\n");
4004 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4005 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4008 * We used to do this check as the "plain" user (after swapping
4009 * UIDs). But the check for nosuid and noexec filesystem is needed,
4010 * and should be done even without HAS_SETREUID. (Maybe those
4011 * operating systems do not have such mount options anyway...)
4012 * Seems safe enough to do as root.
4014 #if !defined(NO_NOSUID_CHECK)
4015 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4016 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4019 #endif /* IAMSUID */
4021 if (!S_ISREG(PL_statbuf.st_mode)) {
4022 Perl_croak(aTHX_ "Setuid script not plain file\n");
4024 if (PL_statbuf.st_mode & S_IWOTH)
4025 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4026 PL_doswitches = FALSE; /* -s is insecure in suid */
4027 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4028 CopLINE_inc(PL_curcop);
4029 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4030 Perl_croak(aTHX_ "No #! line");
4031 linestr = SvPV_nolen_const(PL_linestr);
4032 /* required even on Sys V */
4033 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4034 Perl_croak(aTHX_ "No #! line");
4038 /* Sanity check on line length */
4039 s_end = s + strlen(s);
4040 if (s_end == s || (s_end - s) > 4000)
4041 Perl_croak(aTHX_ "Very long #! line");
4042 /* Allow more than a single space after #! */
4043 while (isSPACE(*s)) s++;
4044 /* Sanity check on buffer end */
4045 while ((*s) && !isSPACE(*s)) s++;
4046 for (s2 = s; (s2 > linestr &&
4047 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4048 || s2[-1] == '-')); s2--) ;
4049 /* Sanity check on buffer start */
4050 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4051 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4052 Perl_croak(aTHX_ "Not a perl script");
4053 while (*s == ' ' || *s == '\t') s++;
4055 * #! arg must be what we saw above. They can invoke it by
4056 * mentioning suidperl explicitly, but they may not add any strange
4057 * arguments beyond what #! says if they do invoke suidperl that way.
4060 * The way validarg was set up, we rely on the kernel to start
4061 * scripts with argv[1] set to contain all #! line switches (the
4065 * Check that we got all the arguments listed in the #! line (not
4066 * just that there are no extraneous arguments). Might not matter
4067 * much, as switches from #! line seem to be acted upon (also), and
4068 * so may be checked and trapped in perl. But, security checks must
4069 * be done in suidperl and not deferred to perl. Note that suidperl
4070 * does not get around to parsing (and checking) the switches on
4071 * the #! line (but execs perl sooner).
4072 * Allow (require) a trailing newline (which may be of two
4073 * characters on some architectures?) (but no other trailing
4076 len = strlen(validarg);
4077 if (strEQ(validarg," PHOOEY ") ||
4078 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4079 !((s_end - s) == len+1
4080 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4081 Perl_croak(aTHX_ "Args must match #! line");
4085 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4086 PL_euid == PL_statbuf.st_uid)
4088 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4089 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4090 #endif /* IAMSUID */
4093 PL_euid) { /* oops, we're not the setuid root perl */
4095 * When root runs a setuid script, we do not go through the same
4096 * steps of execing sperl and then perl with fd scripts, but
4097 * simply set up UIDs within the same perl invocation; so do
4098 * not have the same checks (on options, whatever) that we have
4099 * for plain users. No problem really: would have to be a script
4100 * that does not actually work for plain users; and if root is
4101 * foolish and can be persuaded to run such an unsafe script, he
4102 * might run also non-setuid ones, and deserves what he gets.
4104 * Or, we might drop the PL_euid check above (and rely just on
4105 * fdscript to avoid loops), and do the execs
4111 * Pass fd script to suidperl.
4112 * Exec suidperl, substituting fd script for scriptname.
4113 * Pass script name as "subdir" of fd, which perl will grok;
4114 * in fact will use that to distinguish this from "normal"
4115 * usage, see comments above.
4117 PerlIO_rewind(PL_rsfp);
4118 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4119 /* PSz 27 Feb 04 Sanity checks on scriptname */
4120 if ((!scriptname) || (!*scriptname) ) {
4121 Perl_croak(aTHX_ "No setuid script name\n");
4123 if (*scriptname == '-') {
4124 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4125 /* Or we might confuse it with an option when replacing
4126 * name in argument list, below (though we do pointer, not
4127 * string, comparisons).
4130 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4131 if (!PL_origargv[which]) {
4132 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4134 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4135 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4136 #if defined(HAS_FCNTL) && defined(F_SETFD)
4137 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4140 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4141 (int)PERL_REVISION, (int)PERL_VERSION,
4142 (int)PERL_SUBVERSION), PL_origargv);
4144 #endif /* IAMSUID */
4145 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4148 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4150 * This seems back to front: we try HAS_SETEGID first; if not available
4151 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4152 * in the sense that we only want to set EGID; but are there any machines
4153 * with either of the latter, but not the former? Same with UID, later.
4156 (void)setegid(PL_statbuf.st_gid);
4159 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4161 #ifdef HAS_SETRESGID
4162 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4164 PerlProc_setgid(PL_statbuf.st_gid);
4168 if (PerlProc_getegid() != PL_statbuf.st_gid)
4169 Perl_croak(aTHX_ "Can't do setegid!\n");
4171 if (PL_statbuf.st_mode & S_ISUID) {
4172 if (PL_statbuf.st_uid != PL_euid)
4174 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4177 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4179 #ifdef HAS_SETRESUID
4180 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4182 PerlProc_setuid(PL_statbuf.st_uid);
4186 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4187 Perl_croak(aTHX_ "Can't do seteuid!\n");
4189 else if (PL_uid) { /* oops, mustn't run as root */
4191 (void)seteuid((Uid_t)PL_uid);
4194 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4196 #ifdef HAS_SETRESUID
4197 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4199 PerlProc_setuid((Uid_t)PL_uid);
4203 if (PerlProc_geteuid() != PL_uid)
4204 Perl_croak(aTHX_ "Can't do seteuid!\n");
4207 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4208 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4211 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4212 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4213 else if (fdscript < 0 || suidscript != 1)
4214 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4215 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4217 /* PSz 16 Sep 03 Keep neat error message */
4218 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4221 /* We absolutely must clear out any saved ids here, so we */
4222 /* exec the real perl, substituting fd script for scriptname. */
4223 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4225 * It might be thought that using setresgid and/or setresuid (changed to
4226 * set the saved IDs) above might obviate the need to exec, and we could
4227 * go on to "do the perl thing".
4229 * Is there such a thing as "saved GID", and is that set for setuid (but
4230 * not setgid) execution like suidperl? Without exec, it would not be
4231 * cleared for setuid (but not setgid) scripts (or might need a dummy
4234 * We need suidperl to do the exact same argument checking that perl
4235 * does. Thus it cannot be very small; while it could be significantly
4236 * smaller, it is safer (simpler?) to make it essentially the same
4237 * binary as perl (but they are not identical). - Maybe could defer that
4238 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4239 * but prefer to do thorough checks in suidperl itself. Such deferral
4240 * would make suidperl security rely on perl, a design no-no.
4242 * Setuid things should be short and simple, thus easy to understand and
4243 * verify. They should do their "own thing", without influence by
4244 * attackers. It may help if their internal execution flow is fixed,
4245 * regardless of platform: it may be best to exec anyway.
4247 * Suidperl should at least be conceptually simple: a wrapper only,
4248 * never to do any real perl. Maybe we should put
4250 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4252 * into the perly bits.
4254 PerlIO_rewind(PL_rsfp);
4255 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4257 * Keep original arguments: suidperl already has fd script.
4259 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4260 /* if (!PL_origargv[which]) { */
4261 /* errno = EPERM; */
4262 /* Perl_croak(aTHX_ "Permission denied\n"); */
4264 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4265 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4266 #if defined(HAS_FCNTL) && defined(F_SETFD)
4267 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4270 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4271 (int)PERL_REVISION, (int)PERL_VERSION,
4272 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4274 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4275 #endif /* IAMSUID */
4277 PERL_UNUSED_ARG(fdscript);
4278 PERL_UNUSED_ARG(suidscript);
4279 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4280 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4281 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4282 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4284 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4287 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4288 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4289 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4290 /* not set-id, must be wrapped */
4293 PERL_UNUSED_ARG(validarg);
4294 PERL_UNUSED_ARG(scriptname);
4298 S_find_beginning(pTHX)
4302 register const char *s2;
4303 #ifdef MACOS_TRADITIONAL
4307 /* skip forward in input to the real script? */
4309 #ifdef MACOS_TRADITIONAL
4310 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4312 while (PL_doextract || gMacPerl_AlwaysExtract) {
4313 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4314 if (!gMacPerl_AlwaysExtract)
4315 Perl_croak(aTHX_ "No Perl script found in input\n");
4317 if (PL_doextract) /* require explicit override ? */
4318 if (!OverrideExtract(PL_origfilename))
4319 Perl_croak(aTHX_ "User aborted script\n");
4321 PL_doextract = FALSE;
4323 /* Pater peccavi, file does not have #! */
4324 PerlIO_rewind(PL_rsfp);
4329 while (PL_doextract) {
4330 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4331 Perl_croak(aTHX_ "No Perl script found in input\n");
4334 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4335 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4336 PL_doextract = FALSE;
4337 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4339 while (*s == ' ' || *s == '\t') s++;
4341 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4342 || s2[-1] == '_') s2--;
4343 if (strnEQ(s2-4,"perl",4))
4344 while ((s = moreswitches(s)))
4347 #ifdef MACOS_TRADITIONAL
4348 /* We are always searching for the #!perl line in MacPerl,
4349 * so if we find it, still keep the line count correct
4350 * by counting lines we already skipped over
4352 for (; maclines > 0 ; maclines--)
4353 PerlIO_ungetc(PL_rsfp, '\n');
4357 /* gMacPerl_AlwaysExtract is false in MPW tool */
4358 } else if (gMacPerl_AlwaysExtract) {
4370 PL_uid = PerlProc_getuid();
4371 PL_euid = PerlProc_geteuid();
4372 PL_gid = PerlProc_getgid();
4373 PL_egid = PerlProc_getegid();
4375 PL_uid |= PL_gid << 16;
4376 PL_euid |= PL_egid << 16;
4378 /* Should not happen: */
4379 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4380 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4383 * Should go by suidscript, not uid!=euid: why disallow
4384 * system("ls") in scripts run from setuid things?
4385 * Or, is this run before we check arguments and set suidscript?
4386 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4387 * (We never have suidscript, can we be sure to have fdscript?)
4388 * Or must then go by UID checks? See comments in forbid_setid also.
4392 /* This is used very early in the lifetime of the program,
4393 * before even the options are parsed, so PL_tainting has
4394 * not been initialized properly. */
4396 Perl_doing_taint(int argc, char *argv[], char *envp[])
4398 #ifndef PERL_IMPLICIT_SYS
4399 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4400 * before we have an interpreter-- and the whole point of this
4401 * function is to be called at such an early stage. If you are on
4402 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4403 * "tainted because running with altered effective ids', you'll
4404 * have to add your own checks somewhere in here. The two most
4405 * known samples of 'implicitness' are Win32 and NetWare, neither
4406 * of which has much of concept of 'uids'. */
4407 int uid = PerlProc_getuid();
4408 int euid = PerlProc_geteuid();
4409 int gid = PerlProc_getgid();
4410 int egid = PerlProc_getegid();
4417 if (uid && (euid != uid || egid != gid))
4419 #endif /* !PERL_IMPLICIT_SYS */
4420 /* This is a really primitive check; environment gets ignored only
4421 * if -T are the first chars together; otherwise one gets
4422 * "Too late" message. */
4423 if ( argc > 1 && argv[1][0] == '-'
4424 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4429 /* Passing the flag as a single char rather than a string is a slight space
4430 optimisation. The only message that isn't /^-.$/ is
4431 "program input from stdin", which is substituted in place of '\0', which
4432 could never be a command line flag. */
4434 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4437 char string[3] = "-x";
4438 const char *message = "program input from stdin";
4445 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4446 if (PL_euid != PL_uid)
4447 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4448 if (PL_egid != PL_gid)
4449 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4450 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4452 * Checks for UID/GID above "wrong": why disallow
4453 * perl -e 'print "Hello\n"'
4454 * from within setuid things?? Simply drop them: replaced by
4455 * fdscript/suidscript and #ifdef IAMSUID checks below.
4457 * This may be too late for command-line switches. Will catch those on
4458 * the #! line, after finding the script name and setting up
4459 * fdscript/suidscript. Note that suidperl does not get around to
4460 * parsing (and checking) the switches on the #! line, but checks that
4461 * the two sets are identical.
4463 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4464 * instead, or would that be "too late"? (We never have suidscript, can
4465 * we be sure to have fdscript?)
4467 * Catch things with suidscript (in descendant of suidperl), even with
4468 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4469 * below; but I am paranoid.
4471 * Also see comments about root running a setuid script, elsewhere.
4473 if (suidscript >= 0)
4474 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4476 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4477 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4478 #endif /* IAMSUID */
4482 Perl_init_debugger(pTHX)
4485 HV * const ostash = PL_curstash;
4487 PL_curstash = PL_debstash;
4488 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4490 AvREAL_off(PL_dbargs);
4491 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4492 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4493 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4494 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4495 sv_setiv(PL_DBsingle, 0);
4496 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4497 sv_setiv(PL_DBtrace, 0);
4498 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4499 sv_setiv(PL_DBsignal, 0);
4500 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4501 sv_setiv(PL_DBassertion, 0);
4502 PL_curstash = ostash;
4505 #ifndef STRESS_REALLOC
4506 #define REASONABLE(size) (size)
4508 #define REASONABLE(size) (1) /* unreasonable */
4512 Perl_init_stacks(pTHX)
4515 /* start with 128-item stack and 8K cxstack */
4516 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4517 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4518 PL_curstackinfo->si_type = PERLSI_MAIN;
4519 PL_curstack = PL_curstackinfo->si_stack;
4520 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4522 PL_stack_base = AvARRAY(PL_curstack);
4523 PL_stack_sp = PL_stack_base;
4524 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4526 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4529 PL_tmps_max = REASONABLE(128);
4531 Newx(PL_markstack,REASONABLE(32),I32);
4532 PL_markstack_ptr = PL_markstack;
4533 PL_markstack_max = PL_markstack + REASONABLE(32);
4537 Newx(PL_scopestack,REASONABLE(32),I32);
4538 PL_scopestack_ix = 0;
4539 PL_scopestack_max = REASONABLE(32);
4541 Newx(PL_savestack,REASONABLE(128),ANY);
4542 PL_savestack_ix = 0;
4543 PL_savestack_max = REASONABLE(128);
4552 while (PL_curstackinfo->si_next)
4553 PL_curstackinfo = PL_curstackinfo->si_next;
4554 while (PL_curstackinfo) {
4555 PERL_SI *p = PL_curstackinfo->si_prev;
4556 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4557 Safefree(PL_curstackinfo->si_cxstack);
4558 Safefree(PL_curstackinfo);
4559 PL_curstackinfo = p;
4561 Safefree(PL_tmps_stack);
4562 Safefree(PL_markstack);
4563 Safefree(PL_scopestack);
4564 Safefree(PL_savestack);
4574 lex_start(PL_linestr);
4576 PL_subname = newSVpvs("main");
4580 S_init_predump_symbols(pTHX)
4586 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4587 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4588 GvMULTI_on(PL_stdingv);
4589 io = GvIOp(PL_stdingv);
4590 IoTYPE(io) = IoTYPE_RDONLY;
4591 IoIFP(io) = PerlIO_stdin();
4592 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4594 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4596 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4599 IoTYPE(io) = IoTYPE_WRONLY;
4600 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4602 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4604 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4606 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4607 GvMULTI_on(PL_stderrgv);
4608 io = GvIOp(PL_stderrgv);
4609 IoTYPE(io) = IoTYPE_WRONLY;
4610 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4611 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4613 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4615 PL_statname = newSV(0); /* last filename we did stat on */
4617 Safefree(PL_osname);
4618 PL_osname = savepv(OSNAME);
4622 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4625 argc--,argv++; /* skip name of script */
4626 if (PL_doswitches) {
4627 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4631 if (argv[0][1] == '-' && !argv[0][2]) {
4635 if ((s = strchr(argv[0], '='))) {
4636 const char *const start_name = argv[0] + 1;
4637 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4638 TRUE, SVt_PV)), s + 1);
4641 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4644 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4645 GvMULTI_on(PL_argvgv);
4646 (void)gv_AVadd(PL_argvgv);
4647 av_clear(GvAVn(PL_argvgv));
4648 for (; argc > 0; argc--,argv++) {
4649 SV * const sv = newSVpv(argv[0],0);
4650 av_push(GvAVn(PL_argvgv),sv);
4651 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4652 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4655 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4656 (void)sv_utf8_decode(sv);
4662 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4667 PL_toptarget = newSV_type(SVt_PVFM);
4668 sv_setpvn(PL_toptarget, "", 0);
4669 PL_bodytarget = newSV_type(SVt_PVFM);
4670 sv_setpvn(PL_bodytarget, "", 0);
4671 PL_formtarget = PL_bodytarget;
4675 init_argv_symbols(argc,argv);
4677 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4678 #ifdef MACOS_TRADITIONAL
4679 /* $0 is not majick on a Mac */
4680 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4682 sv_setpv(GvSV(tmpgv),PL_origfilename);
4683 magicname("0", "0", 1);
4686 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4688 bool env_is_not_environ;
4689 GvMULTI_on(PL_envgv);
4690 hv = GvHVn(PL_envgv);
4691 hv_magic(hv, NULL, PERL_MAGIC_env);
4693 #ifdef USE_ENVIRON_ARRAY
4694 /* Note that if the supplied env parameter is actually a copy
4695 of the global environ then it may now point to free'd memory
4696 if the environment has been modified since. To avoid this
4697 problem we treat env==NULL as meaning 'use the default'
4701 env_is_not_environ = env != environ;
4702 if (env_is_not_environ
4703 # ifdef USE_ITHREADS
4704 && PL_curinterp == aTHX
4713 for (; *env; env++) {
4714 if (!(s = strchr(*env,'=')) || s == *env)
4716 #if defined(MSDOS) && !defined(DJGPP)
4721 sv = newSVpv(s+1, 0);
4722 (void)hv_store(hv, *env, s - *env, sv, 0);
4723 if (env_is_not_environ)
4727 #endif /* USE_ENVIRON_ARRAY */
4728 #endif /* !PERL_MICRO */
4731 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4732 SvREADONLY_off(GvSV(tmpgv));
4733 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4734 SvREADONLY_on(GvSV(tmpgv));
4736 #ifdef THREADS_HAVE_PIDS
4737 PL_ppid = (IV)getppid();
4740 /* touch @F array to prevent spurious warnings 20020415 MJD */
4742 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4747 S_init_perllib(pTHX)
4753 s = PerlEnv_getenv("PERL5LIB");
4755 * It isn't possible to delete an environment variable with
4756 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4757 * case we treat PERL5LIB as undefined if it has a zero-length value.
4759 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4760 if (s && *s != '\0')
4764 incpush(s, TRUE, TRUE, TRUE, FALSE);
4766 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4768 /* Treat PERL5?LIB as a possible search list logical name -- the
4769 * "natural" VMS idiom for a Unix path string. We allow each
4770 * element to be a set of |-separated directories for compatibility.
4774 if (my_trnlnm("PERL5LIB",buf,0))
4775 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4777 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4781 /* Use the ~-expanded versions of APPLLIB (undocumented),
4782 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4785 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4789 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4791 #ifdef MACOS_TRADITIONAL
4794 SV * privdir = newSV(0);
4795 char * macperl = PerlEnv_getenv("MACPERL");
4800 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4801 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4802 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4803 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4804 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4805 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4807 SvREFCNT_dec(privdir);
4810 incpush(":", FALSE, FALSE, TRUE, FALSE);
4813 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4816 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4818 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4822 /* sitearch is always relative to sitelib on Windows for
4823 * DLL-based path intuition to work correctly */
4824 # if !defined(WIN32)
4825 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4831 /* this picks up sitearch as well */
4832 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4834 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4838 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4839 /* Search for version-specific dirs below here */
4840 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4843 #ifdef PERL_VENDORARCH_EXP
4844 /* vendorarch is always relative to vendorlib on Windows for
4845 * DLL-based path intuition to work correctly */
4846 # if !defined(WIN32)
4847 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4851 #ifdef PERL_VENDORLIB_EXP
4853 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4855 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4859 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4860 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4863 #ifdef PERL_OTHERLIBDIRS
4864 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4868 incpush(".", FALSE, FALSE, TRUE, FALSE);
4869 #endif /* MACOS_TRADITIONAL */
4872 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4873 # define PERLLIB_SEP ';'
4876 # define PERLLIB_SEP '|'
4878 # if defined(MACOS_TRADITIONAL)
4879 # define PERLLIB_SEP ','
4881 # define PERLLIB_SEP ':'
4885 #ifndef PERLLIB_MANGLE
4886 # define PERLLIB_MANGLE(s,n) (s)
4889 /* Push a directory onto @INC if it exists.
4890 Generate a new SV if we do this, to save needing to copy the SV we push
4893 S_incpush_if_exists(pTHX_ SV *dir)
4897 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4898 S_ISDIR(tmpstatbuf.st_mode)) {
4899 av_push(GvAVn(PL_incgv), dir);
4906 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4911 const char *p = dir;
4916 if (addsubdirs || addoldvers) {
4920 /* Break at all separators */
4922 SV *libdir = newSV(0);
4925 /* skip any consecutive separators */
4927 while ( *p == PERLLIB_SEP ) {
4928 /* Uncomment the next line for PATH semantics */
4929 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4934 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4935 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4940 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4941 p = NULL; /* break out */
4943 #ifdef MACOS_TRADITIONAL
4944 if (!strchr(SvPVX(libdir), ':')) {
4947 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4949 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4950 sv_catpvs(libdir, ":");
4953 /* Do the if() outside the #ifdef to avoid warnings about an unused
4956 #ifdef PERL_RELOCATABLE_INC
4958 * Relocatable include entries are marked with a leading .../
4961 * 0: Remove that leading ".../"
4962 * 1: Remove trailing executable name (anything after the last '/')
4963 * from the perl path to give a perl prefix
4965 * While the @INC element starts "../" and the prefix ends with a real
4966 * directory (ie not . or ..) chop that real directory off the prefix
4967 * and the leading "../" from the @INC element. ie a logical "../"
4969 * Finally concatenate the prefix and the remainder of the @INC element
4970 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4971 * generates /usr/local/lib/perl5
4973 const char *libpath = SvPVX(libdir);
4974 STRLEN libpath_len = SvCUR(libdir);
4975 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4977 SV * const caret_X = get_sv("\030", 0);
4978 /* Going to use the SV just as a scratch buffer holding a C
4984 /* $^X is *the* source of taint if tainting is on, hence
4985 SvPOK() won't be true. */
4987 assert(SvPOKp(caret_X));
4988 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4989 /* Firstly take off the leading .../
4990 If all else fail we'll do the paths relative to the current
4992 sv_chop(libdir, libpath + 4);
4993 /* Don't use SvPV as we're intentionally bypassing taining,
4994 mortal copies that the mg_get of tainting creates, and
4995 corruption that seems to come via the save stack.
4996 I guess that the save stack isn't correctly set up yet. */
4997 libpath = SvPVX(libdir);
4998 libpath_len = SvCUR(libdir);
5000 /* This would work more efficiently with memrchr, but as it's
5001 only a GNU extension we'd need to probe for it and
5002 implement our own. Not hard, but maybe not worth it? */
5004 prefix = SvPVX(prefix_sv);
5005 lastslash = strrchr(prefix, '/');
5007 /* First time in with the *lastslash = '\0' we just wipe off
5008 the trailing /perl from (say) /usr/foo/bin/perl
5012 while ((*lastslash = '\0'), /* Do that, come what may. */
5013 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5014 && (lastslash = strrchr(prefix, '/')))) {
5015 if (lastslash[1] == '\0'
5016 || (lastslash[1] == '.'
5017 && (lastslash[2] == '/' /* ends "/." */
5018 || (lastslash[2] == '/'
5019 && lastslash[3] == '/' /* or "/.." */
5021 /* Prefix ends "/" or "/." or "/..", any of which
5022 are fishy, so don't do any more logical cleanup.
5026 /* Remove leading "../" from path */
5029 /* Next iteration round the loop removes the last
5030 directory name from prefix by writing a '\0' in
5031 the while clause. */
5033 /* prefix has been terminated with a '\0' to the correct
5034 length. libpath points somewhere into the libdir SV.
5035 We need to join the 2 with '/' and drop the result into
5037 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5038 SvREFCNT_dec(libdir);
5039 /* And this is the new libdir. */
5042 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5043 /* Need to taint reloccated paths if running set ID */
5044 SvTAINTED_on(libdir);
5047 SvREFCNT_dec(prefix_sv);
5052 * BEFORE pushing libdir onto @INC we may first push version- and
5053 * archname-specific sub-directories.
5055 if (addsubdirs || addoldvers) {
5056 #ifdef PERL_INC_VERSION_LIST
5057 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5058 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5059 const char * const *incver;
5065 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5067 while (unix[len-1] == '/') len--; /* Cosmetic */
5068 sv_usepvn(libdir,unix,len);
5071 PerlIO_printf(Perl_error_log,
5072 "Failed to unixify @INC element \"%s\"\n",
5076 #ifdef MACOS_TRADITIONAL
5077 #define PERL_AV_SUFFIX_FMT ""
5078 #define PERL_ARCH_FMT "%s:"
5079 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5081 #define PERL_AV_SUFFIX_FMT "/"
5082 #define PERL_ARCH_FMT "/%s"
5083 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5085 /* .../version/archname if -d .../version/archname */
5086 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5088 (int)PERL_REVISION, (int)PERL_VERSION,
5089 (int)PERL_SUBVERSION, ARCHNAME);
5090 subdir = S_incpush_if_exists(aTHX_ subdir);
5092 /* .../version if -d .../version */
5093 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5095 (int)PERL_REVISION, (int)PERL_VERSION,
5096 (int)PERL_SUBVERSION);
5097 subdir = S_incpush_if_exists(aTHX_ subdir);
5099 /* .../archname if -d .../archname */
5100 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5101 SVfARG(libdir), ARCHNAME);
5102 subdir = S_incpush_if_exists(aTHX_ subdir);
5106 #ifdef PERL_INC_VERSION_LIST
5108 for (incver = incverlist; *incver; incver++) {
5109 /* .../xxx if -d .../xxx */
5110 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5111 SVfARG(libdir), *incver);
5112 subdir = S_incpush_if_exists(aTHX_ subdir);
5118 /* finally push this lib directory on the end of @INC */
5119 av_push(GvAVn(PL_incgv), libdir);
5122 assert (SvREFCNT(subdir) == 1);
5123 SvREFCNT_dec(subdir);
5129 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5133 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5139 while (av_len(paramList) >= 0) {
5140 cv = (CV*)av_shift(paramList);
5142 if (paramList == PL_beginav) {
5143 /* save PL_beginav for compiler */
5144 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5146 else if (paramList == PL_checkav) {
5147 /* save PL_checkav for compiler */
5148 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5150 else if (paramList == PL_unitcheckav) {
5151 /* save PL_unitcheckav for compiler */
5152 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5163 PL_madskills |= 16384;
5168 PL_madskills &= ~16384;
5171 (void)SvPV_const(atsv, len);
5173 PL_curcop = &PL_compiling;
5174 CopLINE_set(PL_curcop, oldline);
5175 if (paramList == PL_beginav)
5176 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5178 Perl_sv_catpvf(aTHX_ atsv,
5179 "%s failed--call queue aborted",
5180 paramList == PL_checkav ? "CHECK"
5181 : paramList == PL_initav ? "INIT"
5182 : paramList == PL_unitcheckav ? "UNITCHECK"
5184 while (PL_scopestack_ix > oldscope)
5187 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5194 /* my_exit() was called */
5195 while (PL_scopestack_ix > oldscope)
5198 PL_curstash = PL_defstash;
5199 PL_curcop = &PL_compiling;
5200 CopLINE_set(PL_curcop, oldline);
5202 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5203 if (paramList == PL_beginav)
5204 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5206 Perl_croak(aTHX_ "%s failed--call queue aborted",
5207 paramList == PL_checkav ? "CHECK"
5208 : paramList == PL_initav ? "INIT"
5209 : paramList == PL_unitcheckav ? "UNITCHECK"
5216 PL_curcop = &PL_compiling;
5217 CopLINE_set(PL_curcop, oldline);
5220 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5229 Perl_my_exit(pTHX_ U32 status)
5232 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5233 (void*)thr, (unsigned long) status));
5242 STATUS_EXIT_SET(status);
5249 Perl_my_failure_exit(pTHX)
5253 /* We have been called to fall on our sword. The desired exit code
5254 * should be already set in STATUS_UNIX, but could be shifted over
5255 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5258 * If an error code has not been set, then force the issue.
5260 if (MY_POSIX_EXIT) {
5262 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5263 * the exit code when there isn't an error.
5266 if (STATUS_UNIX == 0)
5267 STATUS_UNIX_EXIT_SET(255);
5269 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5271 /* The exit code could have been set by $? or vmsish which
5272 * means that it may not be fatal. So convert
5273 * success/warning codes to fatal.
5275 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5276 STATUS_UNIX_EXIT_SET(255);
5280 /* Traditionally Perl on VMS always expects a Fatal Error. */
5281 if (vaxc$errno & 1) {
5283 /* So force success status to failure */
5284 if (STATUS_NATIVE & 1)
5289 STATUS_UNIX = EINTR; /* In case something cares */
5294 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5296 /* Encode the severity code */
5297 severity = STATUS_NATIVE & STS$M_SEVERITY;
5298 STATUS_UNIX = (severity ? severity : 1) << 8;
5300 /* Perl expects this to be a fatal error */
5301 if (severity != STS$K_SEVERE)
5310 STATUS_UNIX_SET(errno);
5312 exitstatus = STATUS_UNIX >> 8;
5313 if (exitstatus & 255)
5314 STATUS_UNIX_SET(exitstatus);
5316 STATUS_UNIX_SET(255);
5323 S_my_exit_jump(pTHX)
5328 SvREFCNT_dec(PL_e_script);
5332 POPSTACK_TO(PL_mainstack);
5340 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5343 const char * const p = SvPVX_const(PL_e_script);
5344 const char *nl = strchr(p, '\n');
5346 PERL_UNUSED_ARG(idx);
5347 PERL_UNUSED_ARG(maxlen);
5349 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5351 filter_del(read_e_script);
5354 sv_catpvn(buf_sv, p, nl-p);
5355 sv_chop(PL_e_script, nl);
5361 * c-indentation-style: bsd
5363 * indent-tabs-mode: t
5366 * ex: set ts=8 sts=4 sw=4 noet: