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);
185 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
188 Perl_sys_init(int* argc, char*** argv)
190 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
191 PERL_UNUSED_ARG(argv);
192 PERL_SYS_INIT_BODY(argc, argv);
196 Perl_sys_init3(int* argc, char*** argv, char*** env)
198 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
199 PERL_UNUSED_ARG(argv);
200 PERL_UNUSED_ARG(env);
201 PERL_SYS_INIT3_BODY(argc, argv, env);
207 if (!PL_veto_cleanup) {
208 PERL_SYS_TERM_BODY();
213 #ifdef PERL_IMPLICIT_SYS
215 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
216 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
217 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
218 struct IPerlDir* ipD, struct IPerlSock* ipS,
219 struct IPerlProc* ipP)
221 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
224 S_init_tls_and_interp(my_perl);
225 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
242 =head1 Embedding Functions
244 =for apidoc perl_alloc
246 Allocates a new Perl interpreter. See L<perlembed>.
254 PerlInterpreter *my_perl;
256 /* Newx() needs interpreter, so call malloc() instead */
257 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
259 S_init_tls_and_interp(my_perl);
260 #ifndef PERL_TRACK_MEMPOOL
261 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
263 Zero(my_perl, 1, PerlInterpreter);
264 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
268 #endif /* PERL_IMPLICIT_SYS */
271 =for apidoc perl_construct
273 Initializes a new Perl interpreter. See L<perlembed>.
279 perl_construct(pTHXx)
282 PERL_UNUSED_ARG(my_perl);
285 PL_perl_destruct_level = 1;
287 if (PL_perl_destruct_level > 0)
290 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
292 /* set read-only and try to insure than we wont see REFCNT==0
295 SvREADONLY_on(&PL_sv_undef);
296 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
298 sv_setpv(&PL_sv_no,PL_No);
299 /* value lookup in void context - happens to have the side effect
300 of caching the numeric forms. */
303 SvREADONLY_on(&PL_sv_no);
304 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
306 sv_setpv(&PL_sv_yes,PL_Yes);
309 SvREADONLY_on(&PL_sv_yes);
310 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
312 SvREADONLY_on(&PL_sv_placeholder);
313 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
315 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
316 #ifdef PERL_USES_PL_PIDSTATUS
317 PL_pidstatus = newHV();
320 PL_rs = newSVpvs("\n");
330 SET_NUMERIC_STANDARD();
332 #if defined(LOCAL_PATCH_COUNT)
333 PL_localpatches = local_patches; /* For possible -v */
336 #ifdef HAVE_INTERP_INTERN
340 PerlIO_init(aTHX); /* Hook to IO system */
342 PL_fdpid = newAV(); /* for remembering popen pids by fd */
343 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
344 PL_errors = newSVpvs("");
345 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
346 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
347 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
349 /* First entry is an array of empty elements */
350 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
351 PL_regex_pad = AvARRAY(PL_regex_padav);
353 #ifdef USE_REENTRANT_API
354 Perl_reentrant_init(aTHX);
357 /* Note that strtab is a rather special HV. Assumptions are made
358 about not iterating on it, and not adding tie magic to it.
359 It is properly deallocated in perl_destruct() */
362 HvSHAREKEYS_off(PL_strtab); /* mandatory */
363 hv_ksplit(PL_strtab, 512);
365 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
366 _dyld_lookup_and_bind
367 ("__environ", (unsigned long *) &environ_pointer, NULL);
371 # ifdef USE_ENVIRON_ARRAY
372 PL_origenviron = environ;
376 /* Use sysconf(_SC_CLK_TCK) if available, if not
377 * available or if the sysconf() fails, use the HZ.
378 * BeOS has those, but returns the wrong value.
379 * The HZ if not originally defined has been by now
380 * been defined as CLK_TCK, if available. */
381 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
382 PL_clocktick = sysconf(_SC_CLK_TCK);
383 if (PL_clocktick <= 0)
387 PL_stashcache = newHV();
389 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
390 (int)PERL_VERSION, (int)PERL_SUBVERSION);
393 if (!PL_mmap_page_size) {
394 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
396 SETERRNO(0, SS_NORMAL);
398 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
400 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
402 if ((long) PL_mmap_page_size < 0) {
404 SV * const error = ERRSV;
405 SvUPGRADE(error, SVt_PV);
406 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
409 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
413 # ifdef HAS_GETPAGESIZE
414 PL_mmap_page_size = getpagesize();
416 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
417 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
421 if (PL_mmap_page_size <= 0)
422 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
423 (IV) PL_mmap_page_size);
425 #endif /* HAS_MMAP */
427 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
428 PL_timesbase.tms_utime = 0;
429 PL_timesbase.tms_stime = 0;
430 PL_timesbase.tms_cutime = 0;
431 PL_timesbase.tms_cstime = 0;
438 =for apidoc nothreadhook
440 Stub that provides thread hook for perl_destruct when there are
447 Perl_nothreadhook(pTHX)
453 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
455 Perl_dump_sv_child(pTHX_ SV *sv)
458 const int sock = PL_dumper_fd;
459 const int debug_fd = PerlIO_fileno(Perl_debug_log);
460 union control_un control;
463 struct cmsghdr *cmptr;
465 unsigned char buffer[256];
467 if(sock == -1 || debug_fd == -1)
470 PerlIO_flush(Perl_debug_log);
472 /* All these shenanigans are to pass a file descriptor over to our child for
473 it to dump out to. We can't let it hold open the file descriptor when it
474 forks, as the file descriptor it will dump to can turn out to be one end
475 of pipe that some other process will wait on for EOF. (So as it would
476 be open, the wait would be forever.) */
478 msg.msg_control = control.control;
479 msg.msg_controllen = sizeof(control.control);
480 /* We're a connected socket so we don't need a destination */
486 cmptr = CMSG_FIRSTHDR(&msg);
487 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
488 cmptr->cmsg_level = SOL_SOCKET;
489 cmptr->cmsg_type = SCM_RIGHTS;
490 *((int *)CMSG_DATA(cmptr)) = 1;
492 vec[0].iov_base = (void*)&sv;
493 vec[0].iov_len = sizeof(sv);
494 got = sendmsg(sock, &msg, 0);
497 perror("Debug leaking scalars parent sendmsg failed");
500 if(got < sizeof(sv)) {
501 perror("Debug leaking scalars parent short sendmsg");
505 /* Return protocol is
507 unsigned char: length of location string (0 for empty)
508 unsigned char*: string (not terminated)
510 vec[0].iov_base = (void*)&returned_errno;
511 vec[0].iov_len = sizeof(returned_errno);
512 vec[1].iov_base = buffer;
515 got = readv(sock, vec, 2);
518 perror("Debug leaking scalars parent read failed");
519 PerlIO_flush(PerlIO_stderr());
522 if(got < sizeof(returned_errno) + 1) {
523 perror("Debug leaking scalars parent short read");
524 PerlIO_flush(PerlIO_stderr());
529 got = read(sock, buffer + 1, *buffer);
531 perror("Debug leaking scalars parent read 2 failed");
532 PerlIO_flush(PerlIO_stderr());
537 perror("Debug leaking scalars parent short read 2");
538 PerlIO_flush(PerlIO_stderr());
543 if (returned_errno || *buffer) {
544 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
545 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
546 returned_errno, strerror(returned_errno));
552 =for apidoc perl_destruct
554 Shuts down a Perl interpreter. See L<perlembed>.
563 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
565 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
569 PERL_UNUSED_ARG(my_perl);
571 /* wait for all pseudo-forked children to finish */
572 PERL_WAIT_FOR_CHILDREN;
574 destruct_level = PL_perl_destruct_level;
577 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
579 const int i = atoi(s);
580 if (destruct_level < i)
586 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
592 if (PL_endav && !PL_minus_c)
593 call_list(PL_scopestack_ix, PL_endav);
599 /* Need to flush since END blocks can produce output */
602 if (CALL_FPTR(PL_threadhook)(aTHX)) {
603 /* Threads hook has vetoed further cleanup */
604 PL_veto_cleanup = TRUE;
608 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
609 if (destruct_level != 0) {
610 /* Fork here to create a child. Our child's job is to preserve the
611 state of scalars prior to destruction, so that we can instruct it
612 to dump any scalars that we later find have leaked.
613 There's no subtlety in this code - it assumes POSIX, and it doesn't
617 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
618 perror("Debug leaking scalars socketpair failed");
624 perror("Debug leaking scalars fork failed");
628 /* We are the child */
629 const int sock = fd[1];
630 const int debug_fd = PerlIO_fileno(Perl_debug_log);
633 /* Our success message is an integer 0, and a char 0 */
634 static const char success[sizeof(int) + 1];
638 /* We need to close all other file descriptors otherwise we end up
639 with interesting hangs, where the parent closes its end of a
640 pipe, and sits waiting for (another) child to terminate. Only
641 that child never terminates, because it never gets EOF, because
642 we also have the far end of the pipe open. We even need to
643 close the debugging fd, because sometimes it happens to be one
644 end of a pipe, and a process is waiting on the other end for
645 EOF. Normally it would be closed at some point earlier in
646 destruction, but if we happen to cause the pipe to remain open,
647 EOF never occurs, and we get an infinite hang. Hence all the
648 games to pass in a file descriptor if it's actually needed. */
650 f = sysconf(_SC_OPEN_MAX);
652 where = "sysconf failed";
663 union control_un control;
666 struct cmsghdr *cmptr;
670 msg.msg_control = control.control;
671 msg.msg_controllen = sizeof(control.control);
672 /* We're a connected socket so we don't need a source */
676 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
678 vec[0].iov_base = (void*)⌖
679 vec[0].iov_len = sizeof(target);
681 got = recvmsg(sock, &msg, 0);
686 where = "recv failed";
689 if(got < sizeof(target)) {
690 where = "short recv";
694 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
698 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
699 where = "wrong cmsg_len";
702 if(cmptr->cmsg_level != SOL_SOCKET) {
703 where = "wrong cmsg_level";
706 if(cmptr->cmsg_type != SCM_RIGHTS) {
707 where = "wrong cmsg_type";
711 got_fd = *(int*)CMSG_DATA(cmptr);
712 /* For our last little bit of trickery, put the file descriptor
713 back into Perl_debug_log, as if we never actually closed it
715 if(got_fd != debug_fd) {
716 if (dup2(got_fd, debug_fd) == -1) {
723 PerlIO_flush(Perl_debug_log);
725 got = write(sock, &success, sizeof(success));
728 where = "write failed";
731 if(got < sizeof(success)) {
732 where = "short write";
739 int send_errno = errno;
740 unsigned char length = (unsigned char) strlen(where);
741 struct iovec failure[3] = {
742 {(void*)&send_errno, sizeof(send_errno)},
744 {(void*)where, length}
746 int got = writev(sock, failure, 3);
747 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
748 in the parent if we try to read from the socketpair after the
749 child has exited, even if there was data to read.
750 So sleep a bit to give the parent a fighting chance of
753 _exit((got == -1) ? errno : 0);
757 PL_dumper_fd = fd[0];
762 /* We must account for everything. */
764 /* Destroy the main CV and syntax tree */
765 /* Do this now, because destroying ops can cause new SVs to be generated
766 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
767 PL_curcop to point to a valid op from which the filename structure
769 PL_curcop = &PL_compiling;
771 /* ensure comppad/curpad to refer to main's pad */
772 if (CvPADLIST(PL_main_cv)) {
773 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
775 op_free(PL_main_root);
778 PL_main_start = NULL;
779 SvREFCNT_dec(PL_main_cv);
783 /* Tell PerlIO we are about to tear things apart in case
784 we have layers which are using resources that should
788 PerlIO_destruct(aTHX);
790 if (PL_sv_objcount) {
792 * Try to destruct global references. We do this first so that the
793 * destructors and destructees still exist. Some sv's might remain.
794 * Non-referenced objects are on their own.
798 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
799 PL_defoutgv = NULL; /* may have been freed */
802 /* unhook hooks which will soon be, or use, destroyed data */
803 SvREFCNT_dec(PL_warnhook);
805 SvREFCNT_dec(PL_diehook);
808 /* call exit list functions */
809 while (PL_exitlistlen-- > 0)
810 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
812 Safefree(PL_exitlist);
817 /* jettison our possibly duplicated environment */
818 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
819 * so we certainly shouldn't free it here
822 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
823 if (environ != PL_origenviron && !PL_use_safe_putenv
825 /* only main thread can free environ[0] contents */
826 && PL_curinterp == aTHX
832 for (i = 0; environ[i]; i++)
833 safesysfree(environ[i]);
835 /* Must use safesysfree() when working with environ. */
836 safesysfree(environ);
838 environ = PL_origenviron;
841 #endif /* !PERL_MICRO */
843 if (destruct_level == 0) {
845 DEBUG_P(debprofdump());
847 #if defined(PERLIO_LAYERS)
848 /* No more IO - including error messages ! */
849 PerlIO_cleanup(aTHX);
852 CopFILE_free(&PL_compiling);
853 CopSTASH_free(&PL_compiling);
855 /* The exit() function will do everything that needs doing. */
859 /* reset so print() ends up where we expect */
863 /* the syntax tree is shared between clones
864 * so op_free(PL_main_root) only ReREFCNT_dec's
865 * REGEXPs in the parent interpreter
866 * we need to manually ReREFCNT_dec for the clones
869 I32 i = AvFILLp(PL_regex_padav) + 1;
870 SV * const * const ary = AvARRAY(PL_regex_padav);
873 SV * const resv = ary[--i];
875 if (SvFLAGS(resv) & SVf_BREAK) {
876 /* this is PL_reg_curpm, already freed
877 * flag is set in regexec.c:S_regtry
879 SvFLAGS(resv) &= ~SVf_BREAK;
881 else if(SvREPADTMP(resv)) {
882 SvREPADTMP_off(resv);
884 else if(SvIOKp(resv)) {
885 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
890 SvREFCNT_dec(PL_regex_padav);
891 PL_regex_padav = NULL;
895 SvREFCNT_dec((SV*) PL_stashcache);
896 PL_stashcache = NULL;
898 /* loosen bonds of global variables */
900 /* XXX can PL_parser still be non-null here? */
901 if(PL_parser && PL_parser->rsfp) {
902 (void)PerlIO_close(PL_parser->rsfp);
903 PL_parser->rsfp = NULL;
907 Safefree(PL_splitstr);
912 PL_preprocess = FALSE;
918 PL_doswitches = FALSE;
919 PL_dowarn = G_WARN_OFF;
920 PL_doextract = FALSE;
921 PL_sawampersand = FALSE; /* must save all match strings */
924 Safefree(PL_inplace);
926 SvREFCNT_dec(PL_patchlevel);
929 SvREFCNT_dec(PL_e_script);
935 /* magical thingies */
937 SvREFCNT_dec(PL_ofs_sv); /* $, */
940 SvREFCNT_dec(PL_ors_sv); /* $\ */
943 SvREFCNT_dec(PL_rs); /* $/ */
946 Safefree(PL_osname); /* $^O */
949 SvREFCNT_dec(PL_statname);
953 /* defgv, aka *_ should be taken care of elsewhere */
955 /* clean up after study() */
956 SvREFCNT_dec(PL_lastscream);
957 PL_lastscream = NULL;
958 Safefree(PL_screamfirst);
960 Safefree(PL_screamnext);
964 Safefree(PL_efloatbuf);
968 /* startup and shutdown function lists */
969 SvREFCNT_dec(PL_beginav);
970 SvREFCNT_dec(PL_beginav_save);
971 SvREFCNT_dec(PL_endav);
972 SvREFCNT_dec(PL_checkav);
973 SvREFCNT_dec(PL_checkav_save);
974 SvREFCNT_dec(PL_unitcheckav);
975 SvREFCNT_dec(PL_unitcheckav_save);
976 SvREFCNT_dec(PL_initav);
978 PL_beginav_save = NULL;
981 PL_checkav_save = NULL;
982 PL_unitcheckav = NULL;
983 PL_unitcheckav_save = NULL;
986 /* shortcuts just get cleared */
995 PL_last_in_gv = NULL;
1007 SvREFCNT_dec(PL_argvout_stack);
1008 PL_argvout_stack = NULL;
1010 SvREFCNT_dec(PL_modglobal);
1011 PL_modglobal = NULL;
1012 SvREFCNT_dec(PL_preambleav);
1013 PL_preambleav = NULL;
1014 SvREFCNT_dec(PL_subname);
1016 #ifdef PERL_USES_PL_PIDSTATUS
1017 SvREFCNT_dec(PL_pidstatus);
1018 PL_pidstatus = NULL;
1020 SvREFCNT_dec(PL_toptarget);
1021 PL_toptarget = NULL;
1022 SvREFCNT_dec(PL_bodytarget);
1023 PL_bodytarget = NULL;
1024 PL_formtarget = NULL;
1026 /* free locale stuff */
1027 #ifdef USE_LOCALE_COLLATE
1028 Safefree(PL_collation_name);
1029 PL_collation_name = NULL;
1032 #ifdef USE_LOCALE_NUMERIC
1033 Safefree(PL_numeric_name);
1034 PL_numeric_name = NULL;
1035 SvREFCNT_dec(PL_numeric_radix_sv);
1036 PL_numeric_radix_sv = NULL;
1039 /* clear utf8 character classes */
1040 SvREFCNT_dec(PL_utf8_alnum);
1041 SvREFCNT_dec(PL_utf8_alnumc);
1042 SvREFCNT_dec(PL_utf8_ascii);
1043 SvREFCNT_dec(PL_utf8_alpha);
1044 SvREFCNT_dec(PL_utf8_space);
1045 SvREFCNT_dec(PL_utf8_cntrl);
1046 SvREFCNT_dec(PL_utf8_graph);
1047 SvREFCNT_dec(PL_utf8_digit);
1048 SvREFCNT_dec(PL_utf8_upper);
1049 SvREFCNT_dec(PL_utf8_lower);
1050 SvREFCNT_dec(PL_utf8_print);
1051 SvREFCNT_dec(PL_utf8_punct);
1052 SvREFCNT_dec(PL_utf8_xdigit);
1053 SvREFCNT_dec(PL_utf8_mark);
1054 SvREFCNT_dec(PL_utf8_toupper);
1055 SvREFCNT_dec(PL_utf8_totitle);
1056 SvREFCNT_dec(PL_utf8_tolower);
1057 SvREFCNT_dec(PL_utf8_tofold);
1058 SvREFCNT_dec(PL_utf8_idstart);
1059 SvREFCNT_dec(PL_utf8_idcont);
1060 PL_utf8_alnum = NULL;
1061 PL_utf8_alnumc = NULL;
1062 PL_utf8_ascii = NULL;
1063 PL_utf8_alpha = NULL;
1064 PL_utf8_space = NULL;
1065 PL_utf8_cntrl = NULL;
1066 PL_utf8_graph = NULL;
1067 PL_utf8_digit = NULL;
1068 PL_utf8_upper = NULL;
1069 PL_utf8_lower = NULL;
1070 PL_utf8_print = NULL;
1071 PL_utf8_punct = NULL;
1072 PL_utf8_xdigit = NULL;
1073 PL_utf8_mark = NULL;
1074 PL_utf8_toupper = NULL;
1075 PL_utf8_totitle = NULL;
1076 PL_utf8_tolower = NULL;
1077 PL_utf8_tofold = NULL;
1078 PL_utf8_idstart = NULL;
1079 PL_utf8_idcont = NULL;
1081 if (!specialWARN(PL_compiling.cop_warnings))
1082 PerlMemShared_free(PL_compiling.cop_warnings);
1083 PL_compiling.cop_warnings = NULL;
1084 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1085 PL_compiling.cop_hints_hash = NULL;
1086 CopFILE_free(&PL_compiling);
1087 CopSTASH_free(&PL_compiling);
1089 /* Prepare to destruct main symbol table. */
1094 SvREFCNT_dec(PL_curstname);
1095 PL_curstname = NULL;
1097 /* clear queued errors */
1098 SvREFCNT_dec(PL_errors);
1101 SvREFCNT_dec(PL_isarev);
1104 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1105 if (PL_scopestack_ix != 0)
1106 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1107 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1108 (long)PL_scopestack_ix);
1109 if (PL_savestack_ix != 0)
1110 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1111 "Unbalanced saves: %ld more saves than restores\n",
1112 (long)PL_savestack_ix);
1113 if (PL_tmps_floor != -1)
1114 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1115 (long)PL_tmps_floor + 1);
1116 if (cxstack_ix != -1)
1117 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1118 (long)cxstack_ix + 1);
1121 /* Now absolutely destruct everything, somehow or other, loops or no. */
1122 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1123 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1125 /* the 2 is for PL_fdpid and PL_strtab */
1126 while (PL_sv_count > 2 && sv_clean_all())
1129 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1130 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1131 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1132 SvFLAGS(PL_strtab) |= SVt_PVHV;
1134 AvREAL_off(PL_fdpid); /* no surviving entries */
1135 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1138 #ifdef HAVE_INTERP_INTERN
1142 /* Destruct the global string table. */
1144 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1145 * so that sv_free() won't fail on them.
1146 * Now that the global string table is using a single hunk of memory
1147 * for both HE and HEK, we either need to explicitly unshare it the
1148 * correct way, or actually free things here.
1151 const I32 max = HvMAX(PL_strtab);
1152 HE * const * const array = HvARRAY(PL_strtab);
1153 HE *hent = array[0];
1156 if (hent && ckWARN_d(WARN_INTERNAL)) {
1157 HE * const next = HeNEXT(hent);
1158 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1159 "Unbalanced string table refcount: (%ld) for \"%s\"",
1160 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1167 hent = array[riter];
1172 HvARRAY(PL_strtab) = 0;
1173 HvTOTALKEYS(PL_strtab) = 0;
1174 HvFILL(PL_strtab) = 0;
1176 SvREFCNT_dec(PL_strtab);
1179 /* free the pointer tables used for cloning */
1180 ptr_table_free(PL_ptr_table);
1181 PL_ptr_table = (PTR_TBL_t*)NULL;
1184 /* free special SVs */
1186 SvREFCNT(&PL_sv_yes) = 0;
1187 sv_clear(&PL_sv_yes);
1188 SvANY(&PL_sv_yes) = NULL;
1189 SvFLAGS(&PL_sv_yes) = 0;
1191 SvREFCNT(&PL_sv_no) = 0;
1192 sv_clear(&PL_sv_no);
1193 SvANY(&PL_sv_no) = NULL;
1194 SvFLAGS(&PL_sv_no) = 0;
1198 for (i=0; i<=2; i++) {
1199 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1200 sv_clear(PERL_DEBUG_PAD(i));
1201 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1202 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1206 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1207 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1209 #ifdef DEBUG_LEAKING_SCALARS
1210 if (PL_sv_count != 0) {
1215 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1216 svend = &sva[SvREFCNT(sva)];
1217 for (sv = sva + 1; sv < svend; ++sv) {
1218 if (SvTYPE(sv) != SVTYPEMASK) {
1219 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1221 " refcnt=%"UVuf pTHX__FORMAT "\n"
1222 "\tallocated at %s:%d %s %s%s\n",
1223 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1224 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1226 sv->sv_debug_inpad ? "for" : "by",
1227 sv->sv_debug_optype ?
1228 PL_op_name[sv->sv_debug_optype]: "(none)",
1229 sv->sv_debug_cloned ? " (cloned)" : ""
1231 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1232 Perl_dump_sv_child(aTHX_ sv);
1238 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1242 /* Wait for up to 4 seconds for child to terminate.
1243 This seems to be the least effort way of timing out on reaping
1245 struct timeval waitfor = {4, 0};
1246 int sock = PL_dumper_fd;
1250 FD_SET(sock, &rset);
1251 select(sock + 1, &rset, NULL, NULL, &waitfor);
1252 waitpid(child, &status, WNOHANG);
1259 #ifdef PERL_DEBUG_READONLY_OPS
1265 #if defined(PERLIO_LAYERS)
1266 /* No more IO - including error messages ! */
1267 PerlIO_cleanup(aTHX);
1270 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1271 as currently layers use it rather than NULL as a marker
1272 for no arg - and will try and SvREFCNT_dec it.
1274 SvREFCNT(&PL_sv_undef) = 0;
1275 SvREADONLY_off(&PL_sv_undef);
1277 Safefree(PL_origfilename);
1278 PL_origfilename = NULL;
1279 Safefree(PL_reg_start_tmp);
1280 PL_reg_start_tmp = (char**)NULL;
1281 PL_reg_start_tmpl = 0;
1282 Safefree(PL_reg_curpm);
1283 Safefree(PL_reg_poscache);
1284 free_tied_hv_pool();
1285 Safefree(PL_op_mask);
1286 Safefree(PL_psig_ptr);
1287 PL_psig_ptr = (SV**)NULL;
1288 Safefree(PL_psig_name);
1289 PL_psig_name = (SV**)NULL;
1290 Safefree(PL_bitcount);
1292 Safefree(PL_psig_pend);
1293 PL_psig_pend = (int*)NULL;
1296 PL_tainting = FALSE;
1297 PL_taint_warn = FALSE;
1298 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1301 DEBUG_P(debprofdump());
1303 #ifdef USE_REENTRANT_API
1304 Perl_reentrant_free(aTHX);
1309 while (PL_regmatch_slab) {
1310 regmatch_slab *s = PL_regmatch_slab;
1311 PL_regmatch_slab = PL_regmatch_slab->next;
1315 /* As the absolutely last thing, free the non-arena SV for mess() */
1318 /* we know that type == SVt_PVMG */
1320 /* it could have accumulated taint magic */
1323 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1324 moremagic = mg->mg_moremagic;
1325 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1327 Safefree(mg->mg_ptr);
1331 /* we know that type >= SVt_PV */
1332 SvPV_free(PL_mess_sv);
1333 Safefree(SvANY(PL_mess_sv));
1334 Safefree(PL_mess_sv);
1341 =for apidoc perl_free
1343 Releases a Perl interpreter. See L<perlembed>.
1353 if (PL_veto_cleanup)
1356 #ifdef PERL_TRACK_MEMPOOL
1359 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1360 * value as we're probably hunting memory leaks then
1362 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1363 if (!s || atoi(s) == 0) {
1364 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1365 thread at thread exit. */
1366 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1367 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1372 #if defined(WIN32) || defined(NETWARE)
1373 # if defined(PERL_IMPLICIT_SYS)
1376 void *host = nw_internal_host;
1378 void *host = w32_internal_host;
1380 PerlMem_free(aTHXx);
1382 nw_delete_internal_host(host);
1384 win32_delete_internal_host(host);
1388 PerlMem_free(aTHXx);
1391 PerlMem_free(aTHXx);
1395 #if defined(USE_ITHREADS)
1396 /* provide destructors to clean up the thread key when libperl is unloaded */
1397 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1399 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1400 #pragma fini "perl_fini"
1401 #elif defined(__sun) && !defined(__GNUC__)
1402 #pragma fini (perl_fini)
1406 #if defined(__GNUC__)
1407 __attribute__((destructor))
1412 if (PL_curinterp && !PL_veto_cleanup)
1417 #endif /* THREADS */
1420 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1423 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1424 PL_exitlist[PL_exitlistlen].fn = fn;
1425 PL_exitlist[PL_exitlistlen].ptr = ptr;
1429 #ifdef HAS_PROCSELFEXE
1430 /* This is a function so that we don't hold on to MAXPATHLEN
1431 bytes of stack longer than necessary
1434 S_procself_val(pTHX_ SV *sv, const char *arg0)
1436 char buf[MAXPATHLEN];
1437 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1439 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1440 includes a spurious NUL which will cause $^X to fail in system
1441 or backticks (this will prevent extensions from being built and
1442 many tests from working). readlink is not meant to add a NUL.
1443 Normal readlink works fine.
1445 if (len > 0 && buf[len-1] == '\0') {
1449 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1450 returning the text "unknown" from the readlink rather than the path
1451 to the executable (or returning an error from the readlink). Any valid
1452 path has a '/' in it somewhere, so use that to validate the result.
1453 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1455 if (len > 0 && memchr(buf, '/', len)) {
1456 sv_setpvn(sv,buf,len);
1462 #endif /* HAS_PROCSELFEXE */
1465 S_set_caret_X(pTHX) {
1467 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1469 #ifdef HAS_PROCSELFEXE
1470 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1473 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1475 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1482 =for apidoc perl_parse
1484 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1490 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1497 PERL_UNUSED_ARG(my_perl);
1499 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1502 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1503 setuid perl scripts securely.\n");
1504 #endif /* IAMSUID */
1507 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1508 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1509 * This MUST be done before any hash stores or fetches take place.
1510 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1511 * yourself, it is your responsibility to provide a good random seed!
1512 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1513 if (!PL_rehash_seed_set)
1514 PL_rehash_seed = get_hash_seed();
1516 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1518 if (s && (atoi(s) == 1))
1519 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1521 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1526 if (PL_origalen != 0) {
1527 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1530 /* Set PL_origalen be the sum of the contiguous argv[]
1531 * elements plus the size of the env in case that it is
1532 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1533 * as the maximum modifiable length of $0. In the worst case
1534 * the area we are able to modify is limited to the size of
1535 * the original argv[0]. (See below for 'contiguous', though.)
1537 const char *s = NULL;
1540 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1541 /* Do the mask check only if the args seem like aligned. */
1543 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1545 /* See if all the arguments are contiguous in memory. Note
1546 * that 'contiguous' is a loose term because some platforms
1547 * align the argv[] and the envp[]. If the arguments look
1548 * like non-aligned, assume that they are 'strictly' or
1549 * 'traditionally' contiguous. If the arguments look like
1550 * aligned, we just check that they are within aligned
1551 * PTRSIZE bytes. As long as no system has something bizarre
1552 * like the argv[] interleaved with some other data, we are
1553 * fine. (Did I just evoke Murphy's Law?) --jhi */
1554 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1556 for (i = 1; i < PL_origargc; i++) {
1557 if ((PL_origargv[i] == s + 1
1559 || PL_origargv[i] == s + 2
1564 (PL_origargv[i] > s &&
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 #ifndef PERL_USE_SAFE_PUTENV
1578 /* Can we grab env area too to be used as the area for $0? */
1579 if (s && PL_origenviron && !PL_use_safe_putenv) {
1580 if ((PL_origenviron[0] == s + 1)
1583 (PL_origenviron[0] > s &&
1584 PL_origenviron[0] <=
1585 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1588 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1589 s = PL_origenviron[0];
1592 my_setenv("NoNe SuCh", NULL);
1593 /* Force copy of environment. */
1594 for (i = 1; PL_origenviron[i]; i++) {
1595 if (PL_origenviron[i] == s + 1
1598 (PL_origenviron[i] > s &&
1599 PL_origenviron[i] <=
1600 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1603 s = PL_origenviron[i];
1611 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1613 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1618 /* Come here if running an undumped a.out. */
1620 PL_origfilename = savepv(argv[0]);
1621 PL_do_undump = FALSE;
1622 cxstack_ix = -1; /* start label stack again */
1624 assert (!PL_tainted);
1626 S_set_caret_X(aTHX);
1628 init_postdump_symbols(argc,argv,env);
1633 op_free(PL_main_root);
1634 PL_main_root = NULL;
1636 PL_main_start = NULL;
1637 SvREFCNT_dec(PL_main_cv);
1641 oldscope = PL_scopestack_ix;
1642 PL_dowarn = G_WARN_OFF;
1647 parse_body(env,xsinit);
1649 call_list(oldscope, PL_unitcheckav);
1651 call_list(oldscope, PL_checkav);
1658 /* my_exit() was called */
1659 while (PL_scopestack_ix > oldscope)
1662 PL_curstash = PL_defstash;
1664 call_list(oldscope, PL_unitcheckav);
1666 call_list(oldscope, PL_checkav);
1670 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1679 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1683 int argc = PL_origargc;
1684 char **argv = PL_origargv;
1685 const char *scriptname = NULL;
1686 VOL bool dosearch = FALSE;
1687 const char *validarg = "";
1689 register char *s, c;
1690 const char *cddir = NULL;
1691 #ifdef USE_SITECUSTOMIZE
1692 bool minus_f = FALSE;
1694 SV *linestr_sv = newSV_type(SVt_PVIV);
1695 bool add_read_e_script = FALSE;
1697 SvGROW(linestr_sv, 80);
1698 sv_setpvn(linestr_sv,"",0);
1700 sv = newSVpvs(""); /* first used for -I flags */
1704 for (argc--,argv++; argc > 0; argc--,argv++) {
1705 if (argv[0][0] != '-' || !argv[0][1])
1709 validarg = " PHOOEY ";
1713 * Can we rely on the kernel to start scripts with argv[1] set to
1714 * contain all #! line switches (the whole line)? (argv[0] is set to
1715 * the interpreter name, argv[2] to the script name; argv[3] and
1716 * above may contain other arguments.)
1723 #ifndef PERL_STRICT_CR
1747 if ((s = moreswitches(s)))
1752 CHECK_MALLOC_TOO_LATE_FOR('t');
1753 if( !PL_tainting ) {
1754 PL_taint_warn = TRUE;
1760 CHECK_MALLOC_TOO_LATE_FOR('T');
1762 PL_taint_warn = FALSE;
1770 #ifdef MACOS_TRADITIONAL
1771 /* ignore -e for Dev:Pseudo argument */
1772 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1775 forbid_setid('e', -1);
1777 PL_e_script = newSVpvs("");
1778 add_read_e_script = TRUE;
1781 sv_catpv(PL_e_script, s);
1783 sv_catpv(PL_e_script, argv[1]);
1787 Perl_croak(aTHX_ "No code specified for -%c", c);
1788 sv_catpvs(PL_e_script, "\n");
1792 #ifdef USE_SITECUSTOMIZE
1798 case 'I': /* -I handled both here and in moreswitches() */
1799 forbid_setid('I', -1);
1800 if (!*++s && (s=argv[1]) != NULL) {
1804 STRLEN len = strlen(s);
1805 const char * const p = savepvn(s, len);
1806 incpush(p, TRUE, TRUE, FALSE, FALSE);
1807 sv_catpvs(sv, "-I");
1808 sv_catpvn(sv, p, len);
1813 Perl_croak(aTHX_ "No directory specified for -I");
1816 forbid_setid('P', -1);
1817 PL_preprocess = TRUE;
1822 forbid_setid('S', -1);
1830 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1832 /* Can't do newSVpvs() as that would involve pre-processor
1833 condititionals inside a macro expansion. */
1834 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1841 # ifdef PERL_DONT_CREATE_GVSV
1842 " PERL_DONT_CREATE_GVSV"
1844 # ifdef PERL_MALLOC_WRAP
1847 # ifdef PERL_MEM_LOG
1850 # ifdef PERL_MEM_LOG_ENV
1853 # ifdef PERL_MEM_LOG_ENV_FD
1854 " PERL_MEM_LOG_ENV_FD"
1856 # ifdef PERL_MEM_LOG_STDERR
1857 " PERL_MEM_LOG_STDERR"
1859 # ifdef PERL_MEM_LOG_TIMESTAMP
1860 " PERL_MEM_LOG_TIMESTAMP"
1862 # ifdef PERL_USE_SAFE_PUTENV
1863 " PERL_USE_SAFE_PUTENV"
1865 # ifdef USE_SITECUSTOMIZE
1866 " USE_SITECUSTOMIZE"
1870 sv_catpv(opts_prog, PL_bincompat_options);
1871 /* Terminate the qw(, and then wrap at 76 columns. */
1872 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1874 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1876 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1879 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1881 #if defined(LOCAL_PATCH_COUNT)
1882 if (LOCAL_PATCH_COUNT > 0) {
1884 sv_catpvs(opts_prog,
1885 "\" Locally applied patches:\\n\",");
1886 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1887 if (PL_localpatches[i])
1888 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1889 0, PL_localpatches[i], 0);
1893 Perl_sv_catpvf(aTHX_ opts_prog,
1894 "\" Built under %s\\n",OSNAME);
1897 Perl_sv_catpvf(aTHX_ opts_prog,
1898 " Compiled at %s %s\\n\"",__DATE__,
1901 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1905 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1906 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1907 "sort grep {/^PERL/} keys %ENV; ");
1909 sv_catpvs(opts_prog,
1910 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1912 sv_catpvs(opts_prog,
1913 "print \" \\%ENV:\\n @env\\n\" if @env;"
1914 "print \" \\@INC:\\n @INC\\n\";");
1918 opts_prog = Perl_newSVpvf(aTHX_
1919 "Config::config_vars(qw%c%s%c)",
1923 av_push(PL_preambleav, opts_prog);
1924 /* don't look for script or read stdin */
1925 scriptname = BIT_BUCKET;
1929 PL_doextract = TRUE;
1937 if (!*++s || isSPACE(*s)) {
1941 /* catch use of gnu style long options */
1942 if (strEQ(s, "version")) {
1946 if (strEQ(s, "help")) {
1953 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1959 #ifndef SECURE_INTERNAL_GETENV
1962 (s = PerlEnv_getenv("PERL5OPT")))
1964 const char *popt = s;
1967 if (*s == '-' && *(s+1) == 'T') {
1968 CHECK_MALLOC_TOO_LATE_FOR('T');
1970 PL_taint_warn = FALSE;
1973 char *popt_copy = NULL;
1986 if (!strchr("CDIMUdmtwA", *s))
1987 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1991 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1992 s = popt_copy + (s - popt);
1993 d = popt_copy + (d - popt);
2000 if( !PL_tainting ) {
2001 PL_taint_warn = TRUE;
2011 #ifdef USE_SITECUSTOMIZE
2013 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2014 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2019 scriptname = argv[0];
2022 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2024 else if (scriptname == NULL) {
2026 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2032 /* Set $^X early so that it can be used for relocatable paths in @INC */
2033 assert (!PL_tainted);
2035 S_set_caret_X(aTHX);
2042 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2044 validate_suid(validarg, scriptname, fdscript, suidscript,
2048 # if defined(SIGCHLD) || defined(SIGCLD)
2051 # define SIGCHLD SIGCLD
2053 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2054 if (sigstate == (Sighandler_t) SIG_IGN) {
2055 if (ckWARN(WARN_SIGNAL))
2056 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2057 "Can't ignore signal CHLD, forcing to default");
2058 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2065 #ifdef MACOS_TRADITIONAL
2066 || gMacPerl_AlwaysExtract
2070 /* This will croak if suidscript is >= 0, as -x cannot be used with
2072 forbid_setid('x', suidscript);
2073 /* Hence you can't get here if suidscript >= 0 */
2075 find_beginning(linestr_sv, rsfp);
2076 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2077 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2081 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2082 CvUNIQUE_on(PL_compcv);
2084 CvPADLIST(PL_compcv) = pad_new(0);
2086 PL_isarev = newHV();
2089 boot_core_UNIVERSAL();
2090 boot_core_xsutils();
2094 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2096 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2102 # ifdef HAS_SOCKS5_INIT
2103 socks5_init(argv[0]);
2109 init_predump_symbols();
2110 /* init_postdump_symbols not currently designed to be called */
2111 /* more than once (ENV isn't cleared first, for example) */
2112 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2114 init_postdump_symbols(argc,argv,env);
2116 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2117 * or explicitly in some platforms.
2118 * locale.c:Perl_init_i18nl10n() if the environment
2119 * look like the user wants to use UTF-8. */
2120 #if defined(__SYMBIAN32__)
2121 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2124 /* Requires init_predump_symbols(). */
2125 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2130 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2131 * and the default open disciplines. */
2132 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2133 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2135 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2136 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2137 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2139 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2140 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2141 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2143 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2144 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2145 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2147 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2148 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2151 sv_setpvn(sv, ":utf8\0:utf8", 11);
2153 sv_setpvn(sv, ":utf8\0", 6);
2156 sv_setpvn(sv, "\0:utf8", 6);
2162 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2163 if (strEQ(s, "unsafe"))
2164 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2165 else if (strEQ(s, "safe"))
2166 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2168 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2172 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2176 PL_xmlfp = PerlIO_stdout();
2178 PL_xmlfp = PerlIO_open(s, "w");
2180 Perl_croak(aTHX_ "Can't open %s", s);
2182 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2184 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2185 PL_madskills = atoi(s);
2186 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2190 lex_start(linestr_sv, rsfp, TRUE);
2191 PL_subname = newSVpvs("main");
2193 if (add_read_e_script)
2194 filter_add(read_e_script, NULL);
2196 /* now parse the script */
2198 SETERRNO(0,SS_NORMAL);
2199 #ifdef MACOS_TRADITIONAL
2200 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2202 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2204 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2205 MacPerl_MPWFileName(PL_origfilename));
2209 if (yyparse() || PL_parser->error_count) {
2211 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2213 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2218 CopLINE_set(PL_curcop, 0);
2219 PL_curstash = PL_defstash;
2220 PL_preprocess = FALSE;
2222 SvREFCNT_dec(PL_e_script);
2230 SAVECOPFILE(PL_curcop);
2231 SAVECOPLINE(PL_curcop);
2232 gv_check(PL_defstash);
2239 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2240 dump_mstats("after compilation:");
2249 =for apidoc perl_run
2251 Tells a Perl interpreter to run. See L<perlembed>.
2264 PERL_UNUSED_ARG(my_perl);
2266 oldscope = PL_scopestack_ix;
2274 cxstack_ix = -1; /* start context stack again */
2276 case 0: /* normal completion */
2280 case 2: /* my_exit() */
2281 while (PL_scopestack_ix > oldscope)
2284 PL_curstash = PL_defstash;
2285 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2286 PL_endav && !PL_minus_c)
2287 call_list(oldscope, PL_endav);
2289 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2290 dump_mstats("after execution: ");
2296 POPSTACK_TO(PL_mainstack);
2299 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2310 S_run_body(pTHX_ I32 oldscope)
2313 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2314 PL_sawampersand ? "Enabling" : "Omitting"));
2316 if (!PL_restartop) {
2320 exit(0); /* less likely to core dump than my_exit(0) */
2323 DEBUG_x(dump_all());
2326 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2328 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2332 #ifdef MACOS_TRADITIONAL
2333 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2334 (gMacPerl_ErrorFormat ? "# " : ""),
2335 MacPerl_MPWFileName(PL_origfilename));
2337 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2341 if (PERLDB_SINGLE && PL_DBsingle)
2342 sv_setiv(PL_DBsingle, 1);
2344 call_list(oldscope, PL_initav);
2345 #ifdef PERL_DEBUG_READONLY_OPS
2346 Perl_pending_Slabs_to_ro(aTHX);
2353 PL_op = PL_restartop;
2357 else if (PL_main_start) {
2358 CvDEPTH(PL_main_cv) = 1;
2359 PL_op = PL_main_start;
2367 =head1 SV Manipulation Functions
2369 =for apidoc p||get_sv
2371 Returns the SV of the specified Perl scalar. If C<create> is set and the
2372 Perl variable does not exist then it will be created. If C<create> is not
2373 set and the variable does not exist then NULL is returned.
2379 Perl_get_sv(pTHX_ const char *name, I32 create)
2382 gv = gv_fetchpv(name, create, SVt_PV);
2389 =head1 Array Manipulation Functions
2391 =for apidoc p||get_av
2393 Returns the AV of the specified Perl array. If C<create> is set and the
2394 Perl variable does not exist then it will be created. If C<create> is not
2395 set and the variable does not exist then NULL is returned.
2401 Perl_get_av(pTHX_ const char *name, I32 create)
2403 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2412 =head1 Hash Manipulation Functions
2414 =for apidoc p||get_hv
2416 Returns the HV of the specified Perl hash. If C<create> is set and the
2417 Perl variable does not exist then it will be created. If C<create> is not
2418 set and the variable does not exist then NULL is returned.
2424 Perl_get_hv(pTHX_ const char *name, I32 create)
2426 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2435 =head1 CV Manipulation Functions
2437 =for apidoc p||get_cvn_flags
2439 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2440 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2441 exist then it will be declared (which has the same effect as saying
2442 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2443 then NULL is returned.
2445 =for apidoc p||get_cv
2447 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2453 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2455 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2456 /* XXX this is probably not what they think they're getting.
2457 * It has the same effect as "sub name;", i.e. just a forward
2459 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2460 SV *const sv = newSVpvn(name,len);
2461 SvFLAGS(sv) |= flags & SVf_UTF8;
2462 return newSUB(start_subparse(FALSE, 0),
2463 newSVOP(OP_CONST, 0, sv),
2472 Perl_get_cv(pTHX_ const char *name, I32 flags)
2474 return get_cvn_flags(name, strlen(name), flags);
2477 /* Be sure to refetch the stack pointer after calling these routines. */
2481 =head1 Callback Functions
2483 =for apidoc p||call_argv
2485 Performs a callback to the specified Perl sub. See L<perlcall>.
2491 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2493 /* See G_* flags in cop.h */
2494 /* null terminated arg list */
2502 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2507 return call_pv(sub_name, flags);
2511 =for apidoc p||call_pv
2513 Performs a callback to the specified Perl sub. See L<perlcall>.
2519 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2520 /* name of the subroutine */
2521 /* See G_* flags in cop.h */
2523 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2527 =for apidoc p||call_method
2529 Performs a callback to the specified Perl method. The blessed object must
2530 be on the stack. See L<perlcall>.
2536 Perl_call_method(pTHX_ const char *methname, I32 flags)
2537 /* name of the subroutine */
2538 /* See G_* flags in cop.h */
2540 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2543 /* May be called with any of a CV, a GV, or an SV containing the name. */
2545 =for apidoc p||call_sv
2547 Performs a callback to the Perl sub whose name is in the SV. See
2554 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2555 /* See G_* flags in cop.h */
2558 LOGOP myop; /* fake syntax tree node */
2563 bool oldcatch = CATCH_GET;
2565 OP* const oldop = PL_op;
2568 if (flags & G_DISCARD) {
2573 Zero(&myop, 1, LOGOP);
2574 myop.op_next = NULL;
2575 if (!(flags & G_NOARGS))
2576 myop.op_flags |= OPf_STACKED;
2577 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2578 (flags & G_ARRAY) ? OPf_WANT_LIST :
2583 EXTEND(PL_stack_sp, 1);
2584 *++PL_stack_sp = sv;
2586 oldscope = PL_scopestack_ix;
2588 if (PERLDB_SUB && PL_curstash != PL_debstash
2589 /* Handle first BEGIN of -d. */
2590 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2591 /* Try harder, since this may have been a sighandler, thus
2592 * curstash may be meaningless. */
2593 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2594 && !(flags & G_NODEBUG))
2595 PL_op->op_private |= OPpENTERSUB_DB;
2597 if (flags & G_METHOD) {
2598 Zero(&method_op, 1, UNOP);
2599 method_op.op_next = PL_op;
2600 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2601 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2602 PL_op = (OP*)&method_op;
2605 if (!(flags & G_EVAL)) {
2607 CALL_BODY_SUB((OP*)&myop);
2608 retval = PL_stack_sp - (PL_stack_base + oldmark);
2609 CATCH_SET(oldcatch);
2612 myop.op_other = (OP*)&myop;
2614 create_eval_scope(flags|G_FAKINGEVAL);
2622 CALL_BODY_SUB((OP*)&myop);
2623 retval = PL_stack_sp - (PL_stack_base + oldmark);
2624 if (!(flags & G_KEEPERR))
2625 sv_setpvn(ERRSV,"",0);
2631 /* my_exit() was called */
2632 PL_curstash = PL_defstash;
2635 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2636 Perl_croak(aTHX_ "Callback called exit");
2641 PL_op = PL_restartop;
2645 PL_stack_sp = PL_stack_base + oldmark;
2646 if (flags & G_ARRAY)
2650 *++PL_stack_sp = &PL_sv_undef;
2655 if (PL_scopestack_ix > oldscope)
2656 delete_eval_scope();
2660 if (flags & G_DISCARD) {
2661 PL_stack_sp = PL_stack_base + oldmark;
2670 /* Eval a string. The G_EVAL flag is always assumed. */
2673 =for apidoc p||eval_sv
2675 Tells Perl to C<eval> the string in the SV.
2681 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2683 /* See G_* flags in cop.h */
2687 UNOP myop; /* fake syntax tree node */
2688 VOL I32 oldmark = SP - PL_stack_base;
2691 OP* const oldop = PL_op;
2694 if (flags & G_DISCARD) {
2701 Zero(PL_op, 1, UNOP);
2702 EXTEND(PL_stack_sp, 1);
2703 *++PL_stack_sp = sv;
2705 if (!(flags & G_NOARGS))
2706 myop.op_flags = OPf_STACKED;
2707 myop.op_next = NULL;
2708 myop.op_type = OP_ENTEREVAL;
2709 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2710 (flags & G_ARRAY) ? OPf_WANT_LIST :
2712 if (flags & G_KEEPERR)
2713 myop.op_flags |= OPf_SPECIAL;
2715 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2716 * before a PUSHEVAL, which corrupts the stack after a croak */
2717 TAINT_PROPER("eval_sv()");
2723 CALL_BODY_EVAL((OP*)&myop);
2724 retval = PL_stack_sp - (PL_stack_base + oldmark);
2725 if (!(flags & G_KEEPERR))
2726 sv_setpvn(ERRSV,"",0);
2732 /* my_exit() was called */
2733 PL_curstash = PL_defstash;
2736 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2737 Perl_croak(aTHX_ "Callback called exit");
2742 PL_op = PL_restartop;
2746 PL_stack_sp = PL_stack_base + oldmark;
2747 if (flags & G_ARRAY)
2751 *++PL_stack_sp = &PL_sv_undef;
2757 if (flags & G_DISCARD) {
2758 PL_stack_sp = PL_stack_base + oldmark;
2768 =for apidoc p||eval_pv
2770 Tells Perl to C<eval> the given string and return an SV* result.
2776 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2780 SV* sv = newSVpv(p, 0);
2782 eval_sv(sv, G_SCALAR);
2789 if (croak_on_error && SvTRUE(ERRSV)) {
2790 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2796 /* Require a module. */
2799 =head1 Embedding Functions
2801 =for apidoc p||require_pv
2803 Tells Perl to C<require> the file named by the string argument. It is
2804 analogous to the Perl code C<eval "require '$file'">. It's even
2805 implemented that way; consider using load_module instead.
2810 Perl_require_pv(pTHX_ const char *pv)
2815 PUSHSTACKi(PERLSI_REQUIRE);
2817 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2818 eval_sv(sv_2mortal(sv), G_DISCARD);
2824 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2826 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2829 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2833 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2835 /* This message really ought to be max 23 lines.
2836 * Removed -h because the user already knows that option. Others? */
2838 static const char * const usage_msg[] = {
2839 "-0[octal] specify record separator (\\0, if no argument)",
2840 "-a autosplit mode with -n or -p (splits $_ into @F)",
2841 "-C[number/list] enables the listed Unicode features",
2842 "-c check syntax only (runs BEGIN and CHECK blocks)",
2843 "-d[:debugger] run program under debugger",
2844 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2845 "-e program one line of program (several -e's allowed, omit programfile)",
2846 "-E program like -e, but enables all optional features",
2847 "-f don't do $sitelib/sitecustomize.pl at startup",
2848 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2849 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2850 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2851 "-l[octal] enable line ending processing, specifies line terminator",
2852 "-[mM][-]module execute \"use/no module...\" before executing program",
2853 "-n assume \"while (<>) { ... }\" loop around program",
2854 "-p assume loop like -n but print line also, like sed",
2855 "-P run program through C preprocessor before compilation",
2856 "-s enable rudimentary parsing for switches after programfile",
2857 "-S look for programfile using PATH environment variable",
2858 "-t enable tainting warnings",
2859 "-T enable tainting checks",
2860 "-u dump core after parsing program",
2861 "-U allow unsafe operations",
2862 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2863 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2864 "-w enable many useful warnings (RECOMMENDED)",
2865 "-W enable all warnings",
2866 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2867 "-X disable all warnings",
2871 const char * const *p = usage_msg;
2873 PerlIO_printf(PerlIO_stdout(),
2874 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2877 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2880 /* convert a string of -D options (or digits) into an int.
2881 * sets *s to point to the char after the options */
2885 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2887 static const char * const usage_msgd[] = {
2888 " Debugging flag values: (see also -d)",
2889 " p Tokenizing and parsing (with v, displays parse stack)",
2890 " s Stack snapshots (with v, displays all stacks)",
2891 " l Context (loop) stack processing",
2892 " t Trace execution",
2893 " o Method and overloading resolution",
2894 " c String/numeric conversions",
2895 " P Print profiling info, preprocessor command for -P, source file input state",
2896 " m Memory allocation",
2897 " f Format processing",
2898 " r Regular expression parsing and execution",
2899 " x Syntax tree dump",
2900 " u Tainting checks",
2901 " H Hash dump -- usurps values()",
2902 " X Scratchpad allocation",
2904 " S Thread synchronization",
2906 " R Include reference counts of dumped variables (eg when using -Ds)",
2907 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2908 " v Verbose: use in conjunction with other flags",
2910 " A Consistency checks on internal structures",
2911 " q quiet - currently only suppresses the 'EXECUTING' message",
2916 /* if adding extra options, remember to update DEBUG_MASK */
2917 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2919 for (; isALNUM(**s); (*s)++) {
2920 const char * const d = strchr(debopts,**s);
2922 i |= 1 << (d - debopts);
2923 else if (ckWARN_d(WARN_DEBUGGING))
2924 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2925 "invalid option -D%c, use -D'' to see choices\n", **s);
2928 else if (isDIGIT(**s)) {
2930 for (; isALNUM(**s); (*s)++) ;
2932 else if (givehelp) {
2933 const char *const *p = usage_msgd;
2934 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2937 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2938 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2939 "-Dp not implemented on this platform\n");
2945 /* This routine handles any switches that can be given during run */
2948 Perl_moreswitches(pTHX_ char *s)
2959 SvREFCNT_dec(PL_rs);
2960 if (s[1] == 'x' && s[2]) {
2961 const char *e = s+=2;
2967 flags = PERL_SCAN_SILENT_ILLDIGIT;
2968 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2969 if (s + numlen < e) {
2970 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2974 PL_rs = newSVpvs("");
2975 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2976 tmps = (U8*)SvPVX(PL_rs);
2977 uvchr_to_utf8(tmps, rschar);
2978 SvCUR_set(PL_rs, UNISKIP(rschar));
2983 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2984 if (rschar & ~((U8)~0))
2985 PL_rs = &PL_sv_undef;
2986 else if (!rschar && numlen >= 2)
2987 PL_rs = newSVpvs("");
2989 char ch = (char)rschar;
2990 PL_rs = newSVpvn(&ch, 1);
2993 sv_setsv(get_sv("/", TRUE), PL_rs);
2998 PL_unicode = parse_unicode_opts( (const char **)&s );
2999 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3005 while (*s && !isSPACE(*s)) ++s;
3006 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3017 forbid_setid('d', -1);
3020 /* -dt indicates to the debugger that threads will be used */
3021 if (*s == 't' && !isALNUM(s[1])) {
3023 my_setenv("PERL5DB_THREADED", "1");
3026 /* The following permits -d:Mod to accepts arguments following an =
3027 in the fashion that -MSome::Mod does. */
3028 if (*s == ':' || *s == '=') {
3030 SV * const sv = newSVpvs("use Devel::");
3032 /* We now allow -d:Module=Foo,Bar */
3033 while(isALNUM(*s) || *s==':') ++s;
3035 sv_catpv(sv, start);
3037 sv_catpvn(sv, start, s-start);
3038 /* Don't use NUL as q// delimiter here, this string goes in the
3040 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3043 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3046 PL_perldb = PERLDB_ALL;
3053 forbid_setid('D', -1);
3055 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3056 #else /* !DEBUGGING */
3057 if (ckWARN_d(WARN_DEBUGGING))
3058 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3059 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3060 for (s++; isALNUM(*s); s++) ;
3065 usage(PL_origargv[0]);
3068 Safefree(PL_inplace);
3069 #if defined(__CYGWIN__) /* do backup extension automagically */
3070 if (*(s+1) == '\0') {
3071 PL_inplace = savepvs(".bak");
3074 #endif /* __CYGWIN__ */
3076 const char * const start = ++s;
3077 while (*s && !isSPACE(*s))
3080 PL_inplace = savepvn(start, s - start);
3084 if (*s == '-') /* Additional switches on #! line. */
3088 case 'I': /* -I handled both here and in parse_body() */
3089 forbid_setid('I', -1);
3091 while (*s && isSPACE(*s))
3096 /* ignore trailing spaces (possibly followed by other switches) */
3098 for (e = p; *e && !isSPACE(*e); e++) ;
3102 } while (*p && *p != '-');
3103 e = savepvn(s, e-s);
3104 incpush(e, TRUE, TRUE, FALSE, FALSE);
3111 Perl_croak(aTHX_ "No directory specified for -I");
3117 SvREFCNT_dec(PL_ors_sv);
3123 PL_ors_sv = newSVpvs("\n");
3124 numlen = 3 + (*s == '0');
3125 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3129 if (RsPARA(PL_rs)) {
3130 PL_ors_sv = newSVpvs("\n\n");
3133 PL_ors_sv = newSVsv(PL_rs);
3138 forbid_setid('M', -1); /* XXX ? */
3141 forbid_setid('m', -1); /* XXX ? */
3145 const char *use = "use ";
3146 /* -M-foo == 'no foo' */
3147 /* Leading space on " no " is deliberate, to make both
3148 possibilities the same length. */
3149 if (*s == '-') { use = " no "; ++s; }
3150 sv = newSVpvn(use,4);
3152 /* We allow -M'Module qw(Foo Bar)' */
3153 while(isALNUM(*s) || *s==':') ++s;
3155 sv_catpv(sv, start);
3156 if (*(start-1) == 'm') {
3158 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3159 sv_catpvs( sv, " ()");
3163 Perl_croak(aTHX_ "Module name required with -%c option",
3165 sv_catpvn(sv, start, s-start);
3166 sv_catpvs(sv, " split(/,/,q");
3167 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3169 sv_catpvs(sv, "\0)");
3172 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3175 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3186 forbid_setid('s', -1);
3187 PL_doswitches = TRUE;
3201 #ifdef MACOS_TRADITIONAL
3202 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3204 PL_do_undump = TRUE;
3212 if (!sv_derived_from(PL_patchlevel, "version"))
3213 upg_version(PL_patchlevel, TRUE);
3215 PerlIO_printf(PerlIO_stdout(),
3216 Perl_form(aTHX_ "\nThis is perl, %"SVf
3217 #ifdef PERL_PATCHNUM
3218 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3221 SVfARG(vstringify(PL_patchlevel)),
3224 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3225 PerlIO_printf(PerlIO_stdout(),
3226 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3227 SVfARG(vstringify(PL_patchlevel))));
3228 PerlIO_printf(PerlIO_stdout(),
3229 Perl_form(aTHX_ " built under %s at %s %s\n",
3230 OSNAME, __DATE__, __TIME__));
3231 PerlIO_printf(PerlIO_stdout(),
3232 Perl_form(aTHX_ " OS Specific Release: %s\n",
3236 #if defined(LOCAL_PATCH_COUNT)
3237 if (LOCAL_PATCH_COUNT > 0)
3238 PerlIO_printf(PerlIO_stdout(),
3239 "\n(with %d registered patch%s, "
3240 "see perl -V for more detail)",
3242 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3245 PerlIO_printf(PerlIO_stdout(),
3246 "\n\nCopyright 1987-2007, Larry Wall\n");
3247 #ifdef MACOS_TRADITIONAL
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3250 "maintained by Chris Nandor\n");
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3257 PerlIO_printf(PerlIO_stdout(),
3258 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3259 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3264 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "atariST series port, ++jrb bammi@cadence.com\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "MiNT port by Guido Flohr, 1997-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "EPOC port by Olaf Flebbe, 1999-2002\n");
3303 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3307 #ifdef __SYMBIAN32__
3308 PerlIO_printf(PerlIO_stdout(),
3309 "Symbian port by Nokia, 2004-2005\n");
3311 #ifdef BINARY_BUILD_NOTICE
3312 BINARY_BUILD_NOTICE;
3314 PerlIO_printf(PerlIO_stdout(),
3316 Perl may be copied only under the terms of either the Artistic License or the\n\
3317 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3318 Complete documentation for Perl, including FAQ lists, should be found on\n\
3319 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3320 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3323 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3324 PL_dowarn |= G_WARN_ON;
3329 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3330 if (!specialWARN(PL_compiling.cop_warnings))
3331 PerlMemShared_free(PL_compiling.cop_warnings);
3332 PL_compiling.cop_warnings = pWARN_ALL ;
3336 PL_dowarn = G_WARN_ALL_OFF;
3337 if (!specialWARN(PL_compiling.cop_warnings))
3338 PerlMemShared_free(PL_compiling.cop_warnings);
3339 PL_compiling.cop_warnings = pWARN_NONE ;
3344 if (s[1] == '-') /* Additional switches on #! line. */
3349 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3355 #ifdef ALTERNATE_SHEBANG
3356 case 'S': /* OS/2 needs -S on "extproc" line. */
3364 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3369 /* compliments of Tom Christiansen */
3371 /* unexec() can be found in the Gnu emacs distribution */
3372 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3375 Perl_my_unexec(pTHX)
3377 PERL_UNUSED_CONTEXT;
3379 SV * prog = newSVpv(BIN_EXP, 0);
3380 SV * file = newSVpv(PL_origfilename, 0);
3384 sv_catpvs(prog, "/perl");
3385 sv_catpvs(file, ".perldump");
3387 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3388 /* unexec prints msg to stderr in case of failure */
3389 PerlProc_exit(status);
3392 # include <lib$routines.h>
3393 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3394 # elif defined(WIN32) || defined(__CYGWIN__)
3395 Perl_croak(aTHX_ "dump is not supported");
3397 ABORT(); /* for use with undump */
3402 /* initialize curinterp */
3408 # define PERLVAR(var,type)
3409 # define PERLVARA(var,n,type)
3410 # if defined(PERL_IMPLICIT_CONTEXT)
3411 # define PERLVARI(var,type,init) aTHX->var = init;
3412 # define PERLVARIC(var,type,init) aTHX->var = init;
3414 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3415 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3417 # include "intrpvar.h"
3423 # define PERLVAR(var,type)
3424 # define PERLVARA(var,n,type)
3425 # define PERLVARI(var,type,init) PL_##var = init;
3426 # define PERLVARIC(var,type,init) PL_##var = init;
3427 # include "intrpvar.h"
3434 /* As these are inside a structure, PERLVARI isn't capable of initialising
3436 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3437 PL_reg_poscache = PL_reg_starttry = NULL;
3441 S_init_main_stash(pTHX)
3446 PL_curstash = PL_defstash = newHV();
3447 /* We know that the string "main" will be in the global shared string
3448 table, so it's a small saving to use it rather than allocate another
3450 PL_curstname = newSVpvs_share("main");
3451 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3452 /* If we hadn't caused another reference to "main" to be in the shared
3453 string table above, then it would be worth reordering these two,
3454 because otherwise all we do is delete "main" from it as a consequence
3455 of the SvREFCNT_dec, only to add it again with hv_name_set */
3456 SvREFCNT_dec(GvHV(gv));
3457 hv_name_set(PL_defstash, "main", 4, 0);
3458 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3460 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3462 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3463 GvMULTI_on(PL_incgv);
3464 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3465 GvMULTI_on(PL_hintgv);
3466 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3467 SvREFCNT_inc_simple_void(PL_defgv);
3468 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3469 SvREFCNT_inc_simple_void(PL_errgv);
3470 GvMULTI_on(PL_errgv);
3471 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3472 GvMULTI_on(PL_replgv);
3473 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3474 #ifdef PERL_DONT_CREATE_GVSV
3477 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3478 sv_setpvn(ERRSV, "", 0);
3479 PL_curstash = PL_defstash;
3480 CopSTASH_set(&PL_compiling, PL_defstash);
3481 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3482 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3484 /* We must init $/ before switches are processed. */
3485 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3489 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3490 int *suidscript, PerlIO **rsfpp)
3495 const char *cpp_discard_flag;
3504 PL_origfilename = savepvs("-e");
3507 /* if find_script() returns, it returns a malloc()-ed value */
3508 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3510 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3511 const char *s = scriptname + 8;
3517 * Tell apart "normal" usage of fdscript, e.g.
3518 * with bash on FreeBSD:
3519 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3520 * from usage in suidperl.
3521 * Does any "normal" usage leave garbage after the number???
3522 * Is it a mistake to use a similar /dev/fd/ construct for
3527 * Be supersafe and do some sanity-checks.
3528 * Still, can we be sure we got the right thing?
3531 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3534 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3536 scriptname = savepv(s + 1);
3537 Safefree(PL_origfilename);
3538 PL_origfilename = (char *)scriptname;
3543 CopFILE_free(PL_curcop);
3544 CopFILE_set(PL_curcop, PL_origfilename);
3545 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3546 scriptname = (char *)"";
3547 if (fdscript >= 0) {
3548 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3549 # if defined(HAS_FCNTL) && defined(F_SETFD)
3551 /* ensure close-on-exec */
3552 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3557 Perl_croak(aTHX_ "sperl needs fd script\n"
3558 "You should not call sperl directly; do you need to "
3559 "change a #! line\nfrom sperl to perl?\n");
3562 * Do not open (or do other fancy stuff) while setuid.
3563 * Perl does the open, and hands script to suidperl on a fd;
3564 * suidperl only does some checks, sets up UIDs and re-execs
3565 * perl with that fd as it has always done.
3568 if (*suidscript != 1) {
3569 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3572 else if (PL_preprocess) {
3573 const char * const cpp_cfg = CPPSTDIN;
3574 SV * const cpp = newSVpvs("");
3575 SV * const cmd = newSV(0);
3577 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3578 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3579 if (strEQ(cpp_cfg, "cppstdin"))
3580 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3581 sv_catpv(cpp, cpp_cfg);
3584 sv_catpvs(sv, "-I");
3585 sv_catpv(sv,PRIVLIB_EXP);
3588 DEBUG_P(PerlIO_printf(Perl_debug_log,
3589 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3590 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3593 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3600 cpp_discard_flag = "";
3602 cpp_discard_flag = "-C";
3606 perl = os2_execname(aTHX);
3608 perl = PL_origargv[0];
3612 /* This strips off Perl comments which might interfere with
3613 the C pre-processor, including #!. #line directives are
3614 deliberately stripped to avoid confusion with Perl's version
3615 of #line. FWP played some golf with it so it will fit
3616 into VMS's 255 character buffer.
3619 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3621 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3623 Perl_sv_setpvf(aTHX_ cmd, "\
3624 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3625 perl, quote, code, quote, scriptname, SVfARG(cpp),
3626 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3628 PL_doextract = FALSE;
3630 DEBUG_P(PerlIO_printf(Perl_debug_log,
3631 "PL_preprocess: cmd=\"%s\"\n",
3634 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3638 else if (!*scriptname) {
3639 forbid_setid(0, *suidscript);
3640 *rsfpp = PerlIO_stdin();
3643 #ifdef FAKE_BIT_BUCKET
3644 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3645 * is called) and still have the "-e" work. (Believe it or not,
3646 * a /dev/null is required for the "-e" to work because source
3647 * filter magic is used to implement it. ) This is *not* a general
3648 * replacement for a /dev/null. What we do here is create a temp
3649 * file (an empty file), open up that as the script, and then
3650 * immediately close and unlink it. Close enough for jazz. */
3651 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3652 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3653 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3654 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3655 FAKE_BIT_BUCKET_TEMPLATE
3657 const char * const err = "Failed to create a fake bit bucket";
3658 if (strEQ(scriptname, BIT_BUCKET)) {
3659 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3660 int tmpfd = mkstemp(tmpname);
3662 scriptname = tmpname;
3665 Perl_croak(aTHX_ err);
3668 scriptname = mktemp(tmpname);
3670 Perl_croak(aTHX_ err);
3675 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3676 #ifdef FAKE_BIT_BUCKET
3677 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3678 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3679 && strlen(scriptname) == sizeof(tmpname) - 1) {
3682 scriptname = BIT_BUCKET;
3684 # if defined(HAS_FCNTL) && defined(F_SETFD)
3686 /* ensure close-on-exec */
3687 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3690 #endif /* IAMSUID */
3692 /* PSz 16 Sep 03 Keep neat error message */
3694 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3696 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3697 CopFILE(PL_curcop), Strerror(errno));
3703 * I_SYSSTATVFS HAS_FSTATVFS
3705 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3706 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3707 * here so that metaconfig picks them up. */
3711 S_fd_on_nosuid_fs(pTHX_ int fd)
3714 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3715 * but is needed also on machines without setreuid.
3716 * Seems safe enough to run as root.
3718 int check_okay = 0; /* able to do all the required sys/libcalls */
3719 int on_nosuid = 0; /* the fd is on a nosuid fs */
3721 * Need to check noexec also: nosuid might not be set, the average
3722 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3724 int on_noexec = 0; /* the fd is on a noexec fs */
3727 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3728 * fstatvfs() is UNIX98.
3729 * fstatfs() is 4.3 BSD.
3730 * ustat()+getmnt() is pre-4.3 BSD.
3731 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3732 * an irrelevant filesystem while trying to reach the right one.
3735 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3737 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3738 defined(HAS_FSTATVFS)
3739 # define FD_ON_NOSUID_CHECK_OKAY
3740 struct statvfs stfs;
3742 check_okay = fstatvfs(fd, &stfs) == 0;
3743 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3745 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3746 on platforms where it is present. */
3747 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3749 # endif /* fstatvfs */
3751 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3752 defined(PERL_MOUNT_NOSUID) && \
3753 defined(PERL_MOUNT_NOEXEC) && \
3754 defined(HAS_FSTATFS) && \
3755 defined(HAS_STRUCT_STATFS) && \
3756 defined(HAS_STRUCT_STATFS_F_FLAGS)
3757 # define FD_ON_NOSUID_CHECK_OKAY
3760 check_okay = fstatfs(fd, &stfs) == 0;
3761 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3762 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3763 # endif /* fstatfs */
3765 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3766 defined(PERL_MOUNT_NOSUID) && \
3767 defined(PERL_MOUNT_NOEXEC) && \
3768 defined(HAS_FSTAT) && \
3769 defined(HAS_USTAT) && \
3770 defined(HAS_GETMNT) && \
3771 defined(HAS_STRUCT_FS_DATA) && \
3773 # define FD_ON_NOSUID_CHECK_OKAY
3776 if (fstat(fd, &fdst) == 0) {
3778 if (ustat(fdst.st_dev, &us) == 0) {
3780 /* NOSTAT_ONE here because we're not examining fields which
3781 * vary between that case and STAT_ONE. */
3782 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3783 size_t cmplen = sizeof(us.f_fname);
3784 if (sizeof(fsd.fd_req.path) < cmplen)
3785 cmplen = sizeof(fsd.fd_req.path);
3786 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3787 fdst.st_dev == fsd.fd_req.dev) {
3789 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3790 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3795 # endif /* fstat+ustat+getmnt */
3797 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3798 defined(HAS_GETMNTENT) && \
3799 defined(HAS_HASMNTOPT) && \
3800 defined(MNTOPT_NOSUID) && \
3801 defined(MNTOPT_NOEXEC)
3802 # define FD_ON_NOSUID_CHECK_OKAY
3803 FILE *mtab = fopen("/etc/mtab", "r");
3804 struct mntent *entry;
3807 if (mtab && (fstat(fd, &stb) == 0)) {
3808 while (entry = getmntent(mtab)) {
3809 if (stat(entry->mnt_dir, &fsb) == 0
3810 && fsb.st_dev == stb.st_dev)
3812 /* found the filesystem */
3814 if (hasmntopt(entry, MNTOPT_NOSUID))
3816 if (hasmntopt(entry, MNTOPT_NOEXEC))
3819 } /* A single fs may well fail its stat(). */
3824 # endif /* getmntent+hasmntopt */
3827 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3829 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3831 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3832 return ((!check_okay) || on_nosuid || on_noexec);
3834 #endif /* IAMSUID */
3837 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3838 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3843 #endif /* IAMSUID */
3845 /* do we need to emulate setuid on scripts? */
3847 /* This code is for those BSD systems that have setuid #! scripts disabled
3848 * in the kernel because of a security problem. Merely defining DOSUID
3849 * in perl will not fix that problem, but if you have disabled setuid
3850 * scripts in the kernel, this will attempt to emulate setuid and setgid
3851 * on scripts that have those now-otherwise-useless bits set. The setuid
3852 * root version must be called suidperl or sperlN.NNN. If regular perl
3853 * discovers that it has opened a setuid script, it calls suidperl with
3854 * the same argv that it had. If suidperl finds that the script it has
3855 * just opened is NOT setuid root, it sets the effective uid back to the
3856 * uid. We don't just make perl setuid root because that loses the
3857 * effective uid we had before invoking perl, if it was different from the
3860 * Description/comments above do not match current workings:
3861 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3862 * suidperl called with script open and name changed to /dev/fd/N/X;
3863 * suidperl croaks if script is not setuid;
3864 * making perl setuid would be a huge security risk (and yes, that
3865 * would lose any euid we might have had).
3867 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3868 * be defined in suidperl only. suidperl must be setuid root. The
3869 * Configure script will set this up for you if you want it.
3875 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3876 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3877 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3879 const char *linestr;
3883 if (fdscript < 0 || suidscript != 1)
3884 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3886 * Since the script is opened by perl, not suidperl, some of these
3887 * checks are superfluous. Leaving them in probably does not lower
3891 * Do checks even for systems with no HAS_SETREUID.
3892 * We used to swap, then re-swap UIDs with
3893 # ifdef HAS_SETREUID
3894 if (setreuid(PL_euid,PL_uid) < 0
3895 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3896 Perl_croak(aTHX_ "Can't swap uid and euid");
3898 # ifdef HAS_SETREUID
3899 if (setreuid(PL_uid,PL_euid) < 0
3900 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3901 Perl_croak(aTHX_ "Can't reswap uid and euid");
3905 /* On this access check to make sure the directories are readable,
3906 * there is actually a small window that the user could use to make
3907 * filename point to an accessible directory. So there is a faint
3908 * chance that someone could execute a setuid script down in a
3909 * non-accessible directory. I don't know what to do about that.
3910 * But I don't think it's too important. The manual lies when
3911 * it says access() is useful in setuid programs.
3913 * So, access() is pretty useless... but not harmful... do anyway.
3915 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3916 Perl_croak(aTHX_ "Can't access() script\n");
3919 /* If we can swap euid and uid, then we can determine access rights
3920 * with a simple stat of the file, and then compare device and
3921 * inode to make sure we did stat() on the same file we opened.
3922 * Then we just have to make sure he or she can execute it.
3925 * As the script is opened by perl, not suidperl, we do not need to
3926 * care much about access rights.
3928 * The 'script changed' check is needed, or we can get lied to
3929 * about $0 with e.g.
3930 * suidperl /dev/fd/4//bin/x 4<setuidscript
3931 * Without HAS_SETREUID, is it safe to stat() as root?
3933 * Are there any operating systems that pass /dev/fd/xxx for setuid
3934 * scripts, as suggested/described in perlsec(1)? Surely they do not
3935 * pass the script name as we do, so the "script changed" test would
3936 * fail for them... but we never get here with
3937 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3939 * This is one place where we must "lie" about return status: not
3940 * say if the stat() failed. We are doing this as root, and could
3941 * be tricked into reporting existence or not of files that the
3942 * "plain" user cannot even see.
3946 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3947 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3948 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3949 Perl_croak(aTHX_ "Setuid script changed\n");
3953 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3954 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3957 * We used to do this check as the "plain" user (after swapping
3958 * UIDs). But the check for nosuid and noexec filesystem is needed,
3959 * and should be done even without HAS_SETREUID. (Maybe those
3960 * operating systems do not have such mount options anyway...)
3961 * Seems safe enough to do as root.
3963 # if !defined(NO_NOSUID_CHECK)
3964 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3965 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3968 # endif /* IAMSUID */
3970 if (!S_ISREG(PL_statbuf.st_mode)) {
3971 Perl_croak(aTHX_ "Setuid script not plain file\n");
3973 if (PL_statbuf.st_mode & S_IWOTH)
3974 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3975 PL_doswitches = FALSE; /* -s is insecure in suid */
3976 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3977 CopLINE_inc(PL_curcop);
3978 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3979 Perl_croak(aTHX_ "No #! line");
3980 linestr = SvPV_nolen_const(linestr_sv);
3981 /* required even on Sys V */
3982 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3983 Perl_croak(aTHX_ "No #! line");
3987 /* Sanity check on line length */
3988 s_end = s + strlen(s);
3989 if (s_end == s || (s_end - s) > 4000)
3990 Perl_croak(aTHX_ "Very long #! line");
3991 /* Allow more than a single space after #! */
3992 while (isSPACE(*s)) s++;
3993 /* Sanity check on buffer end */
3994 while ((*s) && !isSPACE(*s)) s++;
3995 for (s2 = s; (s2 > linestr &&
3996 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3997 || s2[-1] == '-')); s2--) ;
3998 /* Sanity check on buffer start */
3999 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4000 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4001 Perl_croak(aTHX_ "Not a perl script");
4002 while (*s == ' ' || *s == '\t') s++;
4004 * #! arg must be what we saw above. They can invoke it by
4005 * mentioning suidperl explicitly, but they may not add any strange
4006 * arguments beyond what #! says if they do invoke suidperl that way.
4009 * The way validarg was set up, we rely on the kernel to start
4010 * scripts with argv[1] set to contain all #! line switches (the
4014 * Check that we got all the arguments listed in the #! line (not
4015 * just that there are no extraneous arguments). Might not matter
4016 * much, as switches from #! line seem to be acted upon (also), and
4017 * so may be checked and trapped in perl. But, security checks must
4018 * be done in suidperl and not deferred to perl. Note that suidperl
4019 * does not get around to parsing (and checking) the switches on
4020 * the #! line (but execs perl sooner).
4021 * Allow (require) a trailing newline (which may be of two
4022 * characters on some architectures?) (but no other trailing
4025 len = strlen(validarg);
4026 if (strEQ(validarg," PHOOEY ") ||
4027 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4028 !((s_end - s) == len+1
4029 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4030 Perl_croak(aTHX_ "Args must match #! line");
4034 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4035 PL_euid == PL_statbuf.st_uid)
4037 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4038 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4039 # endif /* IAMSUID */
4042 PL_euid) { /* oops, we're not the setuid root perl */
4044 * When root runs a setuid script, we do not go through the same
4045 * steps of execing sperl and then perl with fd scripts, but
4046 * simply set up UIDs within the same perl invocation; so do
4047 * not have the same checks (on options, whatever) that we have
4048 * for plain users. No problem really: would have to be a script
4049 * that does not actually work for plain users; and if root is
4050 * foolish and can be persuaded to run such an unsafe script, he
4051 * might run also non-setuid ones, and deserves what he gets.
4053 * Or, we might drop the PL_euid check above (and rely just on
4054 * fdscript to avoid loops), and do the execs
4060 * Pass fd script to suidperl.
4061 * Exec suidperl, substituting fd script for scriptname.
4062 * Pass script name as "subdir" of fd, which perl will grok;
4063 * in fact will use that to distinguish this from "normal"
4064 * usage, see comments above.
4066 PerlIO_rewind(rsfp);
4067 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4068 /* PSz 27 Feb 04 Sanity checks on scriptname */
4069 if ((!scriptname) || (!*scriptname) ) {
4070 Perl_croak(aTHX_ "No setuid script name\n");
4072 if (*scriptname == '-') {
4073 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4074 /* Or we might confuse it with an option when replacing
4075 * name in argument list, below (though we do pointer, not
4076 * string, comparisons).
4079 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4080 if (!PL_origargv[which]) {
4081 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4083 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4084 PerlIO_fileno(rsfp), PL_origargv[which]));
4085 # if defined(HAS_FCNTL) && defined(F_SETFD)
4086 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4089 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4090 (int)PERL_REVISION, (int)PERL_VERSION,
4091 (int)PERL_SUBVERSION), PL_origargv);
4093 # endif /* IAMSUID */
4094 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4097 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4099 * This seems back to front: we try HAS_SETEGID first; if not available
4100 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4101 * in the sense that we only want to set EGID; but are there any machines
4102 * with either of the latter, but not the former? Same with UID, later.
4105 (void)setegid(PL_statbuf.st_gid);
4107 # ifdef HAS_SETREGID
4108 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4110 # ifdef HAS_SETRESGID
4111 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4113 PerlProc_setgid(PL_statbuf.st_gid);
4117 if (PerlProc_getegid() != PL_statbuf.st_gid)
4118 Perl_croak(aTHX_ "Can't do setegid!\n");
4120 if (PL_statbuf.st_mode & S_ISUID) {
4121 if (PL_statbuf.st_uid != PL_euid)
4123 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4125 # ifdef HAS_SETREUID
4126 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4128 # ifdef HAS_SETRESUID
4129 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4131 PerlProc_setuid(PL_statbuf.st_uid);
4135 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4136 Perl_croak(aTHX_ "Can't do seteuid!\n");
4138 else if (PL_uid) { /* oops, mustn't run as root */
4140 (void)seteuid((Uid_t)PL_uid);
4142 # ifdef HAS_SETREUID
4143 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4145 # ifdef HAS_SETRESUID
4146 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4148 PerlProc_setuid((Uid_t)PL_uid);
4152 if (PerlProc_geteuid() != PL_uid)
4153 Perl_croak(aTHX_ "Can't do seteuid!\n");
4156 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4157 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4160 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4161 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4162 else if (fdscript < 0 || suidscript != 1)
4163 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4164 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4166 /* PSz 16 Sep 03 Keep neat error message */
4167 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4170 /* We absolutely must clear out any saved ids here, so we */
4171 /* exec the real perl, substituting fd script for scriptname. */
4172 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4174 * It might be thought that using setresgid and/or setresuid (changed to
4175 * set the saved IDs) above might obviate the need to exec, and we could
4176 * go on to "do the perl thing".
4178 * Is there such a thing as "saved GID", and is that set for setuid (but
4179 * not setgid) execution like suidperl? Without exec, it would not be
4180 * cleared for setuid (but not setgid) scripts (or might need a dummy
4183 * We need suidperl to do the exact same argument checking that perl
4184 * does. Thus it cannot be very small; while it could be significantly
4185 * smaller, it is safer (simpler?) to make it essentially the same
4186 * binary as perl (but they are not identical). - Maybe could defer that
4187 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4188 * but prefer to do thorough checks in suidperl itself. Such deferral
4189 * would make suidperl security rely on perl, a design no-no.
4191 * Setuid things should be short and simple, thus easy to understand and
4192 * verify. They should do their "own thing", without influence by
4193 * attackers. It may help if their internal execution flow is fixed,
4194 * regardless of platform: it may be best to exec anyway.
4196 * Suidperl should at least be conceptually simple: a wrapper only,
4197 * never to do any real perl. Maybe we should put
4199 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4201 * into the perly bits.
4203 PerlIO_rewind(rsfp);
4204 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4206 * Keep original arguments: suidperl already has fd script.
4208 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4209 /* if (!PL_origargv[which]) { */
4210 /* errno = EPERM; */
4211 /* Perl_croak(aTHX_ "Permission denied\n"); */
4213 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4214 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4215 # if defined(HAS_FCNTL) && defined(F_SETFD)
4216 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4219 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4220 (int)PERL_REVISION, (int)PERL_VERSION,
4221 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4223 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4224 # endif /* IAMSUID */
4226 PERL_UNUSED_ARG(fdscript);
4227 PERL_UNUSED_ARG(suidscript);
4228 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4229 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4230 PERL_UNUSED_ARG(rsfp);
4232 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4233 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4235 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4238 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4239 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4240 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4241 /* not set-id, must be wrapped */
4244 PERL_UNUSED_ARG(validarg);
4245 PERL_UNUSED_ARG(scriptname);
4246 PERL_UNUSED_ARG(linestr_sv);
4250 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4254 register const char *s2;
4255 #ifdef MACOS_TRADITIONAL
4259 /* skip forward in input to the real script? */
4261 #ifdef MACOS_TRADITIONAL
4262 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4264 while (PL_doextract || gMacPerl_AlwaysExtract) {
4265 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4266 if (!gMacPerl_AlwaysExtract)
4267 Perl_croak(aTHX_ "No Perl script found in input\n");
4269 if (PL_doextract) /* require explicit override ? */
4270 if (!OverrideExtract(PL_origfilename))
4271 Perl_croak(aTHX_ "User aborted script\n");
4273 PL_doextract = FALSE;
4275 /* Pater peccavi, file does not have #! */
4276 PerlIO_rewind(rsfp);
4281 while (PL_doextract) {
4282 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4283 Perl_croak(aTHX_ "No Perl script found in input\n");
4286 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4287 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4288 PL_doextract = FALSE;
4289 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4291 while (*s == ' ' || *s == '\t') s++;
4293 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4294 || s2[-1] == '_') s2--;
4295 if (strnEQ(s2-4,"perl",4))
4296 while ((s = moreswitches(s)))
4299 #ifdef MACOS_TRADITIONAL
4300 /* We are always searching for the #!perl line in MacPerl,
4301 * so if we find it, still keep the line count correct
4302 * by counting lines we already skipped over
4304 for (; maclines > 0 ; maclines--)
4305 PerlIO_ungetc(rsfp, '\n');
4309 /* gMacPerl_AlwaysExtract is false in MPW tool */
4310 } else if (gMacPerl_AlwaysExtract) {
4322 PL_uid = PerlProc_getuid();
4323 PL_euid = PerlProc_geteuid();
4324 PL_gid = PerlProc_getgid();
4325 PL_egid = PerlProc_getegid();
4327 PL_uid |= PL_gid << 16;
4328 PL_euid |= PL_egid << 16;
4330 /* Should not happen: */
4331 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4332 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4335 * Should go by suidscript, not uid!=euid: why disallow
4336 * system("ls") in scripts run from setuid things?
4337 * Or, is this run before we check arguments and set suidscript?
4338 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4339 * (We never have suidscript, can we be sure to have fdscript?)
4340 * Or must then go by UID checks? See comments in forbid_setid also.
4344 /* This is used very early in the lifetime of the program,
4345 * before even the options are parsed, so PL_tainting has
4346 * not been initialized properly. */
4348 Perl_doing_taint(int argc, char *argv[], char *envp[])
4350 #ifndef PERL_IMPLICIT_SYS
4351 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4352 * before we have an interpreter-- and the whole point of this
4353 * function is to be called at such an early stage. If you are on
4354 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4355 * "tainted because running with altered effective ids', you'll
4356 * have to add your own checks somewhere in here. The two most
4357 * known samples of 'implicitness' are Win32 and NetWare, neither
4358 * of which has much of concept of 'uids'. */
4359 int uid = PerlProc_getuid();
4360 int euid = PerlProc_geteuid();
4361 int gid = PerlProc_getgid();
4362 int egid = PerlProc_getegid();
4369 if (uid && (euid != uid || egid != gid))
4371 #endif /* !PERL_IMPLICIT_SYS */
4372 /* This is a really primitive check; environment gets ignored only
4373 * if -T are the first chars together; otherwise one gets
4374 * "Too late" message. */
4375 if ( argc > 1 && argv[1][0] == '-'
4376 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4381 /* Passing the flag as a single char rather than a string is a slight space
4382 optimisation. The only message that isn't /^-.$/ is
4383 "program input from stdin", which is substituted in place of '\0', which
4384 could never be a command line flag. */
4386 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4389 char string[3] = "-x";
4390 const char *message = "program input from stdin";
4397 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4398 if (PL_euid != PL_uid)
4399 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4400 if (PL_egid != PL_gid)
4401 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4402 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4404 * Checks for UID/GID above "wrong": why disallow
4405 * perl -e 'print "Hello\n"'
4406 * from within setuid things?? Simply drop them: replaced by
4407 * fdscript/suidscript and #ifdef IAMSUID checks below.
4409 * This may be too late for command-line switches. Will catch those on
4410 * the #! line, after finding the script name and setting up
4411 * fdscript/suidscript. Note that suidperl does not get around to
4412 * parsing (and checking) the switches on the #! line, but checks that
4413 * the two sets are identical.
4415 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4416 * instead, or would that be "too late"? (We never have suidscript, can
4417 * we be sure to have fdscript?)
4419 * Catch things with suidscript (in descendant of suidperl), even with
4420 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4421 * below; but I am paranoid.
4423 * Also see comments about root running a setuid script, elsewhere.
4425 if (suidscript >= 0)
4426 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4428 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4429 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4430 #endif /* IAMSUID */
4434 Perl_init_debugger(pTHX)
4437 HV * const ostash = PL_curstash;
4439 PL_curstash = PL_debstash;
4440 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4442 AvREAL_off(PL_dbargs);
4443 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4444 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4445 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4446 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4447 sv_setiv(PL_DBsingle, 0);
4448 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4449 sv_setiv(PL_DBtrace, 0);
4450 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4451 sv_setiv(PL_DBsignal, 0);
4452 PL_curstash = ostash;
4455 #ifndef STRESS_REALLOC
4456 #define REASONABLE(size) (size)
4458 #define REASONABLE(size) (1) /* unreasonable */
4462 Perl_init_stacks(pTHX)
4465 /* start with 128-item stack and 8K cxstack */
4466 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4467 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4468 PL_curstackinfo->si_type = PERLSI_MAIN;
4469 PL_curstack = PL_curstackinfo->si_stack;
4470 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4472 PL_stack_base = AvARRAY(PL_curstack);
4473 PL_stack_sp = PL_stack_base;
4474 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4476 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4479 PL_tmps_max = REASONABLE(128);
4481 Newx(PL_markstack,REASONABLE(32),I32);
4482 PL_markstack_ptr = PL_markstack;
4483 PL_markstack_max = PL_markstack + REASONABLE(32);
4487 Newx(PL_scopestack,REASONABLE(32),I32);
4488 PL_scopestack_ix = 0;
4489 PL_scopestack_max = REASONABLE(32);
4491 Newx(PL_savestack,REASONABLE(128),ANY);
4492 PL_savestack_ix = 0;
4493 PL_savestack_max = REASONABLE(128);
4502 while (PL_curstackinfo->si_next)
4503 PL_curstackinfo = PL_curstackinfo->si_next;
4504 while (PL_curstackinfo) {
4505 PERL_SI *p = PL_curstackinfo->si_prev;
4506 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4507 Safefree(PL_curstackinfo->si_cxstack);
4508 Safefree(PL_curstackinfo);
4509 PL_curstackinfo = p;
4511 Safefree(PL_tmps_stack);
4512 Safefree(PL_markstack);
4513 Safefree(PL_scopestack);
4514 Safefree(PL_savestack);
4519 S_init_predump_symbols(pTHX)
4525 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4526 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4527 GvMULTI_on(PL_stdingv);
4528 io = GvIOp(PL_stdingv);
4529 IoTYPE(io) = IoTYPE_RDONLY;
4530 IoIFP(io) = PerlIO_stdin();
4531 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4533 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4535 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4538 IoTYPE(io) = IoTYPE_WRONLY;
4539 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4541 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4543 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4545 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4546 GvMULTI_on(PL_stderrgv);
4547 io = GvIOp(PL_stderrgv);
4548 IoTYPE(io) = IoTYPE_WRONLY;
4549 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4550 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4552 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4554 PL_statname = newSV(0); /* last filename we did stat on */
4556 Safefree(PL_osname);
4557 PL_osname = savepv(OSNAME);
4561 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4564 argc--,argv++; /* skip name of script */
4565 if (PL_doswitches) {
4566 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4570 if (argv[0][1] == '-' && !argv[0][2]) {
4574 if ((s = strchr(argv[0], '='))) {
4575 const char *const start_name = argv[0] + 1;
4576 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4577 TRUE, SVt_PV)), s + 1);
4580 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4583 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4584 GvMULTI_on(PL_argvgv);
4585 (void)gv_AVadd(PL_argvgv);
4586 av_clear(GvAVn(PL_argvgv));
4587 for (; argc > 0; argc--,argv++) {
4588 SV * const sv = newSVpv(argv[0],0);
4589 av_push(GvAVn(PL_argvgv),sv);
4590 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4591 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4594 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4595 (void)sv_utf8_decode(sv);
4601 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4606 PL_toptarget = newSV_type(SVt_PVFM);
4607 sv_setpvn(PL_toptarget, "", 0);
4608 PL_bodytarget = newSV_type(SVt_PVFM);
4609 sv_setpvn(PL_bodytarget, "", 0);
4610 PL_formtarget = PL_bodytarget;
4614 init_argv_symbols(argc,argv);
4616 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4617 #ifdef MACOS_TRADITIONAL
4618 /* $0 is not majick on a Mac */
4619 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4621 sv_setpv(GvSV(tmpgv),PL_origfilename);
4622 magicname("0", "0", 1);
4625 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4627 bool env_is_not_environ;
4628 GvMULTI_on(PL_envgv);
4629 hv = GvHVn(PL_envgv);
4630 hv_magic(hv, NULL, PERL_MAGIC_env);
4632 #ifdef USE_ENVIRON_ARRAY
4633 /* Note that if the supplied env parameter is actually a copy
4634 of the global environ then it may now point to free'd memory
4635 if the environment has been modified since. To avoid this
4636 problem we treat env==NULL as meaning 'use the default'
4640 env_is_not_environ = env != environ;
4641 if (env_is_not_environ
4642 # ifdef USE_ITHREADS
4643 && PL_curinterp == aTHX
4652 for (; *env; env++) {
4653 if (!(s = strchr(*env,'=')) || s == *env)
4655 #if defined(MSDOS) && !defined(DJGPP)
4660 sv = newSVpv(s+1, 0);
4661 (void)hv_store(hv, *env, s - *env, sv, 0);
4662 if (env_is_not_environ)
4666 #endif /* USE_ENVIRON_ARRAY */
4667 #endif /* !PERL_MICRO */
4670 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4671 SvREADONLY_off(GvSV(tmpgv));
4672 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4673 SvREADONLY_on(GvSV(tmpgv));
4675 #ifdef THREADS_HAVE_PIDS
4676 PL_ppid = (IV)getppid();
4679 /* touch @F array to prevent spurious warnings 20020415 MJD */
4681 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4686 S_init_perllib(pTHX)
4692 s = PerlEnv_getenv("PERL5LIB");
4694 * It isn't possible to delete an environment variable with
4695 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4696 * case we treat PERL5LIB as undefined if it has a zero-length value.
4698 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4699 if (s && *s != '\0')
4703 incpush(s, TRUE, TRUE, TRUE, FALSE);
4705 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4707 /* Treat PERL5?LIB as a possible search list logical name -- the
4708 * "natural" VMS idiom for a Unix path string. We allow each
4709 * element to be a set of |-separated directories for compatibility.
4713 if (my_trnlnm("PERL5LIB",buf,0))
4714 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4716 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4720 /* Use the ~-expanded versions of APPLLIB (undocumented),
4721 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4724 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4728 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4730 #ifdef MACOS_TRADITIONAL
4733 SV * privdir = newSV(0);
4734 char * macperl = PerlEnv_getenv("MACPERL");
4739 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4740 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4741 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4742 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4743 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4744 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4746 SvREFCNT_dec(privdir);
4749 incpush(":", FALSE, FALSE, TRUE, FALSE);
4752 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4755 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4757 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4761 /* sitearch is always relative to sitelib on Windows for
4762 * DLL-based path intuition to work correctly */
4763 # if !defined(WIN32)
4764 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4770 /* this picks up sitearch as well */
4771 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4773 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4777 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4778 /* Search for version-specific dirs below here */
4779 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4782 #ifdef PERL_VENDORARCH_EXP
4783 /* vendorarch is always relative to vendorlib on Windows for
4784 * DLL-based path intuition to work correctly */
4785 # if !defined(WIN32)
4786 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4790 #ifdef PERL_VENDORLIB_EXP
4792 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4794 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4798 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4799 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4802 #ifdef PERL_OTHERLIBDIRS
4803 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4807 incpush(".", FALSE, FALSE, TRUE, FALSE);
4808 #endif /* MACOS_TRADITIONAL */
4811 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4812 # define PERLLIB_SEP ';'
4815 # define PERLLIB_SEP '|'
4817 # if defined(MACOS_TRADITIONAL)
4818 # define PERLLIB_SEP ','
4820 # define PERLLIB_SEP ':'
4824 #ifndef PERLLIB_MANGLE
4825 # define PERLLIB_MANGLE(s,n) (s)
4828 /* Push a directory onto @INC if it exists.
4829 Generate a new SV if we do this, to save needing to copy the SV we push
4832 S_incpush_if_exists(pTHX_ SV *dir)
4836 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4837 S_ISDIR(tmpstatbuf.st_mode)) {
4838 av_push(GvAVn(PL_incgv), dir);
4845 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4850 const char *p = dir;
4855 if (addsubdirs || addoldvers) {
4859 /* Break at all separators */
4861 SV *libdir = newSV(0);
4864 /* skip any consecutive separators */
4866 while ( *p == PERLLIB_SEP ) {
4867 /* Uncomment the next line for PATH semantics */
4868 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4873 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4874 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4879 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4880 p = NULL; /* break out */
4882 #ifdef MACOS_TRADITIONAL
4883 if (!strchr(SvPVX(libdir), ':')) {
4886 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4888 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4889 sv_catpvs(libdir, ":");
4892 /* Do the if() outside the #ifdef to avoid warnings about an unused
4895 #ifdef PERL_RELOCATABLE_INC
4897 * Relocatable include entries are marked with a leading .../
4900 * 0: Remove that leading ".../"
4901 * 1: Remove trailing executable name (anything after the last '/')
4902 * from the perl path to give a perl prefix
4904 * While the @INC element starts "../" and the prefix ends with a real
4905 * directory (ie not . or ..) chop that real directory off the prefix
4906 * and the leading "../" from the @INC element. ie a logical "../"
4908 * Finally concatenate the prefix and the remainder of the @INC element
4909 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4910 * generates /usr/local/lib/perl5
4912 const char *libpath = SvPVX(libdir);
4913 STRLEN libpath_len = SvCUR(libdir);
4914 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4916 SV * const caret_X = get_sv("\030", 0);
4917 /* Going to use the SV just as a scratch buffer holding a C
4923 /* $^X is *the* source of taint if tainting is on, hence
4924 SvPOK() won't be true. */
4926 assert(SvPOKp(caret_X));
4927 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4928 /* Firstly take off the leading .../
4929 If all else fail we'll do the paths relative to the current
4931 sv_chop(libdir, libpath + 4);
4932 /* Don't use SvPV as we're intentionally bypassing taining,
4933 mortal copies that the mg_get of tainting creates, and
4934 corruption that seems to come via the save stack.
4935 I guess that the save stack isn't correctly set up yet. */
4936 libpath = SvPVX(libdir);
4937 libpath_len = SvCUR(libdir);
4939 /* This would work more efficiently with memrchr, but as it's
4940 only a GNU extension we'd need to probe for it and
4941 implement our own. Not hard, but maybe not worth it? */
4943 prefix = SvPVX(prefix_sv);
4944 lastslash = strrchr(prefix, '/');
4946 /* First time in with the *lastslash = '\0' we just wipe off
4947 the trailing /perl from (say) /usr/foo/bin/perl
4951 while ((*lastslash = '\0'), /* Do that, come what may. */
4952 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4953 && (lastslash = strrchr(prefix, '/')))) {
4954 if (lastslash[1] == '\0'
4955 || (lastslash[1] == '.'
4956 && (lastslash[2] == '/' /* ends "/." */
4957 || (lastslash[2] == '/'
4958 && lastslash[3] == '/' /* or "/.." */
4960 /* Prefix ends "/" or "/." or "/..", any of which
4961 are fishy, so don't do any more logical cleanup.
4965 /* Remove leading "../" from path */
4968 /* Next iteration round the loop removes the last
4969 directory name from prefix by writing a '\0' in
4970 the while clause. */
4972 /* prefix has been terminated with a '\0' to the correct
4973 length. libpath points somewhere into the libdir SV.
4974 We need to join the 2 with '/' and drop the result into
4976 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4977 SvREFCNT_dec(libdir);
4978 /* And this is the new libdir. */
4981 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4982 /* Need to taint reloccated paths if running set ID */
4983 SvTAINTED_on(libdir);
4986 SvREFCNT_dec(prefix_sv);
4991 * BEFORE pushing libdir onto @INC we may first push version- and
4992 * archname-specific sub-directories.
4994 if (addsubdirs || addoldvers) {
4995 #ifdef PERL_INC_VERSION_LIST
4996 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4997 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4998 const char * const *incver;
5004 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5006 while (unix[len-1] == '/') len--; /* Cosmetic */
5007 sv_usepvn(libdir,unix,len);
5010 PerlIO_printf(Perl_error_log,
5011 "Failed to unixify @INC element \"%s\"\n",
5015 #ifdef MACOS_TRADITIONAL
5016 #define PERL_AV_SUFFIX_FMT ""
5017 #define PERL_ARCH_FMT "%s:"
5018 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5020 #define PERL_AV_SUFFIX_FMT "/"
5021 #define PERL_ARCH_FMT "/%s"
5022 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5024 /* .../version/archname if -d .../version/archname */
5025 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5027 (int)PERL_REVISION, (int)PERL_VERSION,
5028 (int)PERL_SUBVERSION, ARCHNAME);
5029 subdir = S_incpush_if_exists(aTHX_ subdir);
5031 /* .../version if -d .../version */
5032 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5034 (int)PERL_REVISION, (int)PERL_VERSION,
5035 (int)PERL_SUBVERSION);
5036 subdir = S_incpush_if_exists(aTHX_ subdir);
5038 /* .../archname if -d .../archname */
5039 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5040 SVfARG(libdir), ARCHNAME);
5041 subdir = S_incpush_if_exists(aTHX_ subdir);
5045 #ifdef PERL_INC_VERSION_LIST
5047 for (incver = incverlist; *incver; incver++) {
5048 /* .../xxx if -d .../xxx */
5049 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5050 SVfARG(libdir), *incver);
5051 subdir = S_incpush_if_exists(aTHX_ subdir);
5057 /* finally push this lib directory on the end of @INC */
5058 av_push(GvAVn(PL_incgv), libdir);
5061 assert (SvREFCNT(subdir) == 1);
5062 SvREFCNT_dec(subdir);
5068 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5072 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5078 while (av_len(paramList) >= 0) {
5079 cv = (CV*)av_shift(paramList);
5081 if (paramList == PL_beginav) {
5082 /* save PL_beginav for compiler */
5083 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5085 else if (paramList == PL_checkav) {
5086 /* save PL_checkav for compiler */
5087 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5089 else if (paramList == PL_unitcheckav) {
5090 /* save PL_unitcheckav for compiler */
5091 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5102 PL_madskills |= 16384;
5107 PL_madskills &= ~16384;
5110 (void)SvPV_const(atsv, len);
5112 PL_curcop = &PL_compiling;
5113 CopLINE_set(PL_curcop, oldline);
5114 if (paramList == PL_beginav)
5115 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5117 Perl_sv_catpvf(aTHX_ atsv,
5118 "%s failed--call queue aborted",
5119 paramList == PL_checkav ? "CHECK"
5120 : paramList == PL_initav ? "INIT"
5121 : paramList == PL_unitcheckav ? "UNITCHECK"
5123 while (PL_scopestack_ix > oldscope)
5126 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5133 /* my_exit() was called */
5134 while (PL_scopestack_ix > oldscope)
5137 PL_curstash = PL_defstash;
5138 PL_curcop = &PL_compiling;
5139 CopLINE_set(PL_curcop, oldline);
5141 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5142 if (paramList == PL_beginav)
5143 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5145 Perl_croak(aTHX_ "%s failed--call queue aborted",
5146 paramList == PL_checkav ? "CHECK"
5147 : paramList == PL_initav ? "INIT"
5148 : paramList == PL_unitcheckav ? "UNITCHECK"
5155 PL_curcop = &PL_compiling;
5156 CopLINE_set(PL_curcop, oldline);
5159 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5168 Perl_my_exit(pTHX_ U32 status)
5171 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5172 (void*)thr, (unsigned long) status));
5181 STATUS_EXIT_SET(status);
5188 Perl_my_failure_exit(pTHX)
5192 /* We have been called to fall on our sword. The desired exit code
5193 * should be already set in STATUS_UNIX, but could be shifted over
5194 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5197 * If an error code has not been set, then force the issue.
5199 if (MY_POSIX_EXIT) {
5201 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5202 * the exit code when there isn't an error.
5205 if (STATUS_UNIX == 0)
5206 STATUS_UNIX_EXIT_SET(255);
5208 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5210 /* The exit code could have been set by $? or vmsish which
5211 * means that it may not be fatal. So convert
5212 * success/warning codes to fatal.
5214 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5215 STATUS_UNIX_EXIT_SET(255);
5219 /* Traditionally Perl on VMS always expects a Fatal Error. */
5220 if (vaxc$errno & 1) {
5222 /* So force success status to failure */
5223 if (STATUS_NATIVE & 1)
5228 STATUS_UNIX = EINTR; /* In case something cares */
5233 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5235 /* Encode the severity code */
5236 severity = STATUS_NATIVE & STS$M_SEVERITY;
5237 STATUS_UNIX = (severity ? severity : 1) << 8;
5239 /* Perl expects this to be a fatal error */
5240 if (severity != STS$K_SEVERE)
5249 STATUS_UNIX_SET(errno);
5251 exitstatus = STATUS_UNIX >> 8;
5252 if (exitstatus & 255)
5253 STATUS_UNIX_SET(exitstatus);
5255 STATUS_UNIX_SET(255);
5262 S_my_exit_jump(pTHX)
5267 SvREFCNT_dec(PL_e_script);
5271 POPSTACK_TO(PL_mainstack);
5279 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5282 const char * const p = SvPVX_const(PL_e_script);
5283 const char *nl = strchr(p, '\n');
5285 PERL_UNUSED_ARG(idx);
5286 PERL_UNUSED_ARG(maxlen);
5288 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5290 filter_del(read_e_script);
5293 sv_catpvn(buf_sv, p, nl-p);
5294 sv_chop(PL_e_script, nl);
5300 * c-indentation-style: bsd
5302 * indent-tabs-mode: t
5305 * ex: set ts=8 sts=4 sw=4 noet: