4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 by Larry Wall
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
28 #define PERL_IN_PERL_C
30 #include "patchlevel.h" /* for local_patches */
37 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
42 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
44 # include <sys/wait.h>
52 char control[CMSG_SPACE(sizeof(int))];
69 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
70 char *getenv (char *); /* Usually in <stdlib.h> */
73 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
75 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
76 /* Drop everything. Heck, don't even try to call it */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
79 /* Drop almost everything */
80 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
83 #define CALL_BODY_SUB(myop) \
84 if (PL_op == (myop)) \
85 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
89 #define CALL_LIST_BODY(cv) \
90 PUSHMARK(PL_stack_sp); \
91 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
94 S_init_tls_and_interp(PerlInterpreter *my_perl)
98 PERL_SET_INTERP(my_perl);
99 #if defined(USE_ITHREADS)
102 PERL_SET_THX(my_perl);
105 MUTEX_INIT(&PL_dollarzero_mutex);
106 MUTEX_INIT(&PL_my_ctx_mutex);
109 #if defined(USE_ITHREADS)
112 /* This always happens for non-ithreads */
115 PERL_SET_THX(my_perl);
120 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
123 Perl_sys_init(int* argc, char*** argv)
127 PERL_ARGS_ASSERT_SYS_INIT;
129 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
130 PERL_UNUSED_ARG(argv);
131 PERL_SYS_INIT_BODY(argc, argv);
135 Perl_sys_init3(int* argc, char*** argv, char*** env)
139 PERL_ARGS_ASSERT_SYS_INIT3;
141 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
142 PERL_UNUSED_ARG(argv);
143 PERL_UNUSED_ARG(env);
144 PERL_SYS_INIT3_BODY(argc, argv, env);
151 if (!PL_veto_cleanup) {
152 PERL_SYS_TERM_BODY();
157 #ifdef PERL_IMPLICIT_SYS
159 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
160 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
161 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
162 struct IPerlDir* ipD, struct IPerlSock* ipS,
163 struct IPerlProc* ipP)
165 PerlInterpreter *my_perl;
167 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
169 /* Newx() needs interpreter, so call malloc() instead */
170 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
171 S_init_tls_and_interp(my_perl);
172 Zero(my_perl, 1, PerlInterpreter);
182 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
189 =head1 Embedding Functions
191 =for apidoc perl_alloc
193 Allocates a new Perl interpreter. See L<perlembed>.
201 PerlInterpreter *my_perl;
203 /* Newx() needs interpreter, so call malloc() instead */
204 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
206 S_init_tls_and_interp(my_perl);
207 #ifndef PERL_TRACK_MEMPOOL
208 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
210 Zero(my_perl, 1, PerlInterpreter);
211 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
215 #endif /* PERL_IMPLICIT_SYS */
218 =for apidoc perl_construct
220 Initializes a new Perl interpreter. See L<perlembed>.
226 perl_construct(pTHXx)
230 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
234 PL_perl_destruct_level = 1;
236 PERL_UNUSED_ARG(my_perl);
237 if (PL_perl_destruct_level > 0)
240 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
242 /* set read-only and try to insure than we wont see REFCNT==0
245 SvREADONLY_on(&PL_sv_undef);
246 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
248 sv_setpv(&PL_sv_no,PL_No);
249 /* value lookup in void context - happens to have the side effect
250 of caching the numeric forms. However, as &PL_sv_no doesn't contain
251 a string that is a valid numer, we have to turn the public flags by
257 SvREADONLY_on(&PL_sv_no);
258 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
260 sv_setpv(&PL_sv_yes,PL_Yes);
263 SvREADONLY_on(&PL_sv_yes);
264 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
266 SvREADONLY_on(&PL_sv_placeholder);
267 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
269 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
270 #ifdef PERL_USES_PL_PIDSTATUS
271 PL_pidstatus = newHV();
274 PL_rs = newSVpvs("\n");
284 SET_NUMERIC_STANDARD();
286 #if defined(LOCAL_PATCH_COUNT)
287 PL_localpatches = local_patches; /* For possible -v */
290 #ifdef HAVE_INTERP_INTERN
294 PerlIO_init(aTHX); /* Hook to IO system */
296 PL_fdpid = newAV(); /* for remembering popen pids by fd */
297 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
298 PL_errors = newSVpvs("");
299 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
300 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
301 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
303 /* First entry is a list of empty elements. It needs to be initialised
304 else all hell breaks loose in S_find_uninit_var(). */
305 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
306 PL_regex_pad = AvARRAY(PL_regex_padav);
308 #ifdef USE_REENTRANT_API
309 Perl_reentrant_init(aTHX);
312 /* Note that strtab is a rather special HV. Assumptions are made
313 about not iterating on it, and not adding tie magic to it.
314 It is properly deallocated in perl_destruct() */
317 HvSHAREKEYS_off(PL_strtab); /* mandatory */
318 hv_ksplit(PL_strtab, 512);
320 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
321 _dyld_lookup_and_bind
322 ("__environ", (unsigned long *) &environ_pointer, NULL);
326 # ifdef USE_ENVIRON_ARRAY
327 PL_origenviron = environ;
331 /* Use sysconf(_SC_CLK_TCK) if available, if not
332 * available or if the sysconf() fails, use the HZ.
333 * BeOS has those, but returns the wrong value.
334 * The HZ if not originally defined has been by now
335 * been defined as CLK_TCK, if available. */
336 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
337 PL_clocktick = sysconf(_SC_CLK_TCK);
338 if (PL_clocktick <= 0)
342 PL_stashcache = newHV();
344 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
345 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
348 if (!PL_mmap_page_size) {
349 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
351 SETERRNO(0, SS_NORMAL);
353 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
355 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
357 if ((long) PL_mmap_page_size < 0) {
359 SV * const error = ERRSV;
360 SvUPGRADE(error, SVt_PV);
361 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
364 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
368 # ifdef HAS_GETPAGESIZE
369 PL_mmap_page_size = getpagesize();
371 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
372 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
376 if (PL_mmap_page_size <= 0)
377 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
378 (IV) PL_mmap_page_size);
380 #endif /* HAS_MMAP */
382 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
383 PL_timesbase.tms_utime = 0;
384 PL_timesbase.tms_stime = 0;
385 PL_timesbase.tms_cutime = 0;
386 PL_timesbase.tms_cstime = 0;
389 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
391 PL_registered_mros = newHV();
392 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
393 HvMAX(PL_registered_mros) = 0;
399 =for apidoc nothreadhook
401 Stub that provides thread hook for perl_destruct when there are
408 Perl_nothreadhook(pTHX)
414 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
416 Perl_dump_sv_child(pTHX_ SV *sv)
419 const int sock = PL_dumper_fd;
420 const int debug_fd = PerlIO_fileno(Perl_debug_log);
421 union control_un control;
424 struct cmsghdr *cmptr;
426 unsigned char buffer[256];
428 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
430 if(sock == -1 || debug_fd == -1)
433 PerlIO_flush(Perl_debug_log);
435 /* All these shenanigans are to pass a file descriptor over to our child for
436 it to dump out to. We can't let it hold open the file descriptor when it
437 forks, as the file descriptor it will dump to can turn out to be one end
438 of pipe that some other process will wait on for EOF. (So as it would
439 be open, the wait would be forever.) */
441 msg.msg_control = control.control;
442 msg.msg_controllen = sizeof(control.control);
443 /* We're a connected socket so we don't need a destination */
449 cmptr = CMSG_FIRSTHDR(&msg);
450 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
451 cmptr->cmsg_level = SOL_SOCKET;
452 cmptr->cmsg_type = SCM_RIGHTS;
453 *((int *)CMSG_DATA(cmptr)) = 1;
455 vec[0].iov_base = (void*)&sv;
456 vec[0].iov_len = sizeof(sv);
457 got = sendmsg(sock, &msg, 0);
460 perror("Debug leaking scalars parent sendmsg failed");
463 if(got < sizeof(sv)) {
464 perror("Debug leaking scalars parent short sendmsg");
468 /* Return protocol is
470 unsigned char: length of location string (0 for empty)
471 unsigned char*: string (not terminated)
473 vec[0].iov_base = (void*)&returned_errno;
474 vec[0].iov_len = sizeof(returned_errno);
475 vec[1].iov_base = buffer;
478 got = readv(sock, vec, 2);
481 perror("Debug leaking scalars parent read failed");
482 PerlIO_flush(PerlIO_stderr());
485 if(got < sizeof(returned_errno) + 1) {
486 perror("Debug leaking scalars parent short read");
487 PerlIO_flush(PerlIO_stderr());
492 got = read(sock, buffer + 1, *buffer);
494 perror("Debug leaking scalars parent read 2 failed");
495 PerlIO_flush(PerlIO_stderr());
500 perror("Debug leaking scalars parent short read 2");
501 PerlIO_flush(PerlIO_stderr());
506 if (returned_errno || *buffer) {
507 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
508 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
509 returned_errno, strerror(returned_errno));
515 =for apidoc perl_destruct
517 Shuts down a Perl interpreter. See L<perlembed>.
526 VOL signed char destruct_level; /* see possible values in intrpvar.h */
528 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
532 PERL_ARGS_ASSERT_PERL_DESTRUCT;
534 PERL_UNUSED_ARG(my_perl);
537 assert(PL_scopestack_ix == 1);
539 /* wait for all pseudo-forked children to finish */
540 PERL_WAIT_FOR_CHILDREN;
542 destruct_level = PL_perl_destruct_level;
545 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
547 const int i = atoi(s);
548 if (destruct_level < i)
554 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
560 if (PL_endav && !PL_minus_c)
561 call_list(PL_scopestack_ix, PL_endav);
566 assert(PL_scopestack_ix == 0);
568 /* Need to flush since END blocks can produce output */
571 if (PL_threadhook(aTHX)) {
572 /* Threads hook has vetoed further cleanup */
573 PL_veto_cleanup = TRUE;
577 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
578 if (destruct_level != 0) {
579 /* Fork here to create a child. Our child's job is to preserve the
580 state of scalars prior to destruction, so that we can instruct it
581 to dump any scalars that we later find have leaked.
582 There's no subtlety in this code - it assumes POSIX, and it doesn't
586 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
587 perror("Debug leaking scalars socketpair failed");
593 perror("Debug leaking scalars fork failed");
597 /* We are the child */
598 const int sock = fd[1];
599 const int debug_fd = PerlIO_fileno(Perl_debug_log);
602 /* Our success message is an integer 0, and a char 0 */
603 static const char success[sizeof(int) + 1] = {0};
607 /* We need to close all other file descriptors otherwise we end up
608 with interesting hangs, where the parent closes its end of a
609 pipe, and sits waiting for (another) child to terminate. Only
610 that child never terminates, because it never gets EOF, because
611 we also have the far end of the pipe open. We even need to
612 close the debugging fd, because sometimes it happens to be one
613 end of a pipe, and a process is waiting on the other end for
614 EOF. Normally it would be closed at some point earlier in
615 destruction, but if we happen to cause the pipe to remain open,
616 EOF never occurs, and we get an infinite hang. Hence all the
617 games to pass in a file descriptor if it's actually needed. */
619 f = sysconf(_SC_OPEN_MAX);
621 where = "sysconf failed";
632 union control_un control;
635 struct cmsghdr *cmptr;
639 msg.msg_control = control.control;
640 msg.msg_controllen = sizeof(control.control);
641 /* We're a connected socket so we don't need a source */
645 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
647 vec[0].iov_base = (void*)⌖
648 vec[0].iov_len = sizeof(target);
650 got = recvmsg(sock, &msg, 0);
655 where = "recv failed";
658 if(got < sizeof(target)) {
659 where = "short recv";
663 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
667 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
668 where = "wrong cmsg_len";
671 if(cmptr->cmsg_level != SOL_SOCKET) {
672 where = "wrong cmsg_level";
675 if(cmptr->cmsg_type != SCM_RIGHTS) {
676 where = "wrong cmsg_type";
680 got_fd = *(int*)CMSG_DATA(cmptr);
681 /* For our last little bit of trickery, put the file descriptor
682 back into Perl_debug_log, as if we never actually closed it
684 if(got_fd != debug_fd) {
685 if (dup2(got_fd, debug_fd) == -1) {
692 PerlIO_flush(Perl_debug_log);
694 got = write(sock, &success, sizeof(success));
697 where = "write failed";
700 if(got < sizeof(success)) {
701 where = "short write";
708 int send_errno = errno;
709 unsigned char length = (unsigned char) strlen(where);
710 struct iovec failure[3] = {
711 {(void*)&send_errno, sizeof(send_errno)},
713 {(void*)where, length}
715 int got = writev(sock, failure, 3);
716 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
717 in the parent if we try to read from the socketpair after the
718 child has exited, even if there was data to read.
719 So sleep a bit to give the parent a fighting chance of
722 _exit((got == -1) ? errno : 0);
726 PL_dumper_fd = fd[0];
731 /* We must account for everything. */
733 /* Destroy the main CV and syntax tree */
734 /* Do this now, because destroying ops can cause new SVs to be generated
735 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
736 PL_curcop to point to a valid op from which the filename structure
738 PL_curcop = &PL_compiling;
740 /* ensure comppad/curpad to refer to main's pad */
741 if (CvPADLIST(PL_main_cv)) {
742 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
744 op_free(PL_main_root);
747 PL_main_start = NULL;
748 /* note that PL_main_cv isn't usually actually freed at this point,
749 * due to the CvOUTSIDE refs from subs compiled within it. It will
750 * get freed once all the subs are freed in sv_clean_all(), for
751 * destruct_level > 0 */
752 SvREFCNT_dec(PL_main_cv);
756 /* Tell PerlIO we are about to tear things apart in case
757 we have layers which are using resources that should
761 PerlIO_destruct(aTHX);
763 if (PL_sv_objcount) {
765 * Try to destruct global references. We do this first so that the
766 * destructors and destructees still exist. Some sv's might remain.
767 * Non-referenced objects are on their own.
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 SvREFCNT_dec(PL_registered_mros);
790 /* jettison our possibly duplicated environment */
791 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
792 * so we certainly shouldn't free it here
795 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
796 if (environ != PL_origenviron && !PL_use_safe_putenv
798 /* only main thread can free environ[0] contents */
799 && PL_curinterp == aTHX
805 for (i = 0; environ[i]; i++)
806 safesysfree(environ[i]);
808 /* Must use safesysfree() when working with environ. */
809 safesysfree(environ);
811 environ = PL_origenviron;
814 #endif /* !PERL_MICRO */
816 if (destruct_level == 0) {
818 DEBUG_P(debprofdump());
820 #if defined(PERLIO_LAYERS)
821 /* No more IO - including error messages ! */
822 PerlIO_cleanup(aTHX);
825 CopFILE_free(&PL_compiling);
826 CopSTASH_free(&PL_compiling);
828 /* The exit() function will do everything that needs doing. */
833 /* the syntax tree is shared between clones
834 * so op_free(PL_main_root) only ReREFCNT_dec's
835 * REGEXPs in the parent interpreter
836 * we need to manually ReREFCNT_dec for the clones
838 SvREFCNT_dec(PL_regex_padav);
839 PL_regex_padav = NULL;
843 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
844 PL_stashcache = NULL;
846 /* loosen bonds of global variables */
848 /* XXX can PL_parser still be non-null here? */
849 if(PL_parser && PL_parser->rsfp) {
850 (void)PerlIO_close(PL_parser->rsfp);
851 PL_parser->rsfp = NULL;
855 Safefree(PL_splitstr);
865 PL_doswitches = FALSE;
866 PL_dowarn = G_WARN_OFF;
867 PL_doextract = FALSE;
868 PL_sawampersand = FALSE; /* must save all match strings */
871 Safefree(PL_inplace);
873 SvREFCNT_dec(PL_patchlevel);
874 SvREFCNT_dec(PL_apiversion);
877 SvREFCNT_dec(PL_e_script);
883 /* magical thingies */
885 SvREFCNT_dec(PL_ofsgv); /* *, */
888 SvREFCNT_dec(PL_ors_sv); /* $\ */
891 SvREFCNT_dec(PL_rs); /* $/ */
894 Safefree(PL_osname); /* $^O */
897 SvREFCNT_dec(PL_statname);
901 /* defgv, aka *_ should be taken care of elsewhere */
903 /* clean up after study() */
904 SvREFCNT_dec(PL_lastscream);
905 PL_lastscream = NULL;
906 Safefree(PL_screamfirst);
908 Safefree(PL_screamnext);
912 Safefree(PL_efloatbuf);
916 /* startup and shutdown function lists */
917 SvREFCNT_dec(PL_beginav);
918 SvREFCNT_dec(PL_beginav_save);
919 SvREFCNT_dec(PL_endav);
920 SvREFCNT_dec(PL_checkav);
921 SvREFCNT_dec(PL_checkav_save);
922 SvREFCNT_dec(PL_unitcheckav);
923 SvREFCNT_dec(PL_unitcheckav_save);
924 SvREFCNT_dec(PL_initav);
926 PL_beginav_save = NULL;
929 PL_checkav_save = NULL;
930 PL_unitcheckav = NULL;
931 PL_unitcheckav_save = NULL;
934 /* shortcuts just get cleared */
943 PL_last_in_gv = NULL;
955 SvREFCNT_dec(PL_argvout_stack);
956 PL_argvout_stack = NULL;
958 SvREFCNT_dec(PL_modglobal);
960 SvREFCNT_dec(PL_preambleav);
961 PL_preambleav = NULL;
962 SvREFCNT_dec(PL_subname);
964 #ifdef PERL_USES_PL_PIDSTATUS
965 SvREFCNT_dec(PL_pidstatus);
968 SvREFCNT_dec(PL_toptarget);
970 SvREFCNT_dec(PL_bodytarget);
971 PL_bodytarget = NULL;
972 PL_formtarget = NULL;
974 /* free locale stuff */
975 #ifdef USE_LOCALE_COLLATE
976 Safefree(PL_collation_name);
977 PL_collation_name = NULL;
980 #ifdef USE_LOCALE_NUMERIC
981 Safefree(PL_numeric_name);
982 PL_numeric_name = NULL;
983 SvREFCNT_dec(PL_numeric_radix_sv);
984 PL_numeric_radix_sv = NULL;
987 /* clear utf8 character classes */
988 SvREFCNT_dec(PL_utf8_alnum);
989 SvREFCNT_dec(PL_utf8_ascii);
990 SvREFCNT_dec(PL_utf8_alpha);
991 SvREFCNT_dec(PL_utf8_space);
992 SvREFCNT_dec(PL_utf8_cntrl);
993 SvREFCNT_dec(PL_utf8_graph);
994 SvREFCNT_dec(PL_utf8_digit);
995 SvREFCNT_dec(PL_utf8_upper);
996 SvREFCNT_dec(PL_utf8_lower);
997 SvREFCNT_dec(PL_utf8_print);
998 SvREFCNT_dec(PL_utf8_punct);
999 SvREFCNT_dec(PL_utf8_xdigit);
1000 SvREFCNT_dec(PL_utf8_mark);
1001 SvREFCNT_dec(PL_utf8_toupper);
1002 SvREFCNT_dec(PL_utf8_totitle);
1003 SvREFCNT_dec(PL_utf8_tolower);
1004 SvREFCNT_dec(PL_utf8_tofold);
1005 SvREFCNT_dec(PL_utf8_idstart);
1006 SvREFCNT_dec(PL_utf8_idcont);
1007 PL_utf8_alnum = NULL;
1008 PL_utf8_ascii = NULL;
1009 PL_utf8_alpha = NULL;
1010 PL_utf8_space = NULL;
1011 PL_utf8_cntrl = NULL;
1012 PL_utf8_graph = NULL;
1013 PL_utf8_digit = NULL;
1014 PL_utf8_upper = NULL;
1015 PL_utf8_lower = NULL;
1016 PL_utf8_print = NULL;
1017 PL_utf8_punct = NULL;
1018 PL_utf8_xdigit = NULL;
1019 PL_utf8_mark = NULL;
1020 PL_utf8_toupper = NULL;
1021 PL_utf8_totitle = NULL;
1022 PL_utf8_tolower = NULL;
1023 PL_utf8_tofold = NULL;
1024 PL_utf8_idstart = NULL;
1025 PL_utf8_idcont = NULL;
1027 if (!specialWARN(PL_compiling.cop_warnings))
1028 PerlMemShared_free(PL_compiling.cop_warnings);
1029 PL_compiling.cop_warnings = NULL;
1030 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1031 PL_compiling.cop_hints_hash = NULL;
1032 CopFILE_free(&PL_compiling);
1033 CopSTASH_free(&PL_compiling);
1035 /* Prepare to destruct main symbol table. */
1038 /* break ref loop *:: <=> %:: */
1039 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1042 SvREFCNT_dec(PL_curstname);
1043 PL_curstname = NULL;
1045 /* clear queued errors */
1046 SvREFCNT_dec(PL_errors);
1049 SvREFCNT_dec(PL_isarev);
1052 if (destruct_level >= 2) {
1053 if (PL_scopestack_ix != 0)
1054 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1055 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1056 (long)PL_scopestack_ix);
1057 if (PL_savestack_ix != 0)
1058 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1059 "Unbalanced saves: %ld more saves than restores\n",
1060 (long)PL_savestack_ix);
1061 if (PL_tmps_floor != -1)
1062 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1063 (long)PL_tmps_floor + 1);
1064 if (cxstack_ix != -1)
1065 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1066 (long)cxstack_ix + 1);
1069 #ifdef PERL_IMPLICIT_CONTEXT
1070 /* the entries in this list are allocated via SV PVX's, so get freed
1071 * in sv_clean_all */
1072 Safefree(PL_my_cxt_list);
1075 /* Now absolutely destruct everything, somehow or other, loops or no. */
1077 /* the 2 is for PL_fdpid and PL_strtab */
1078 while (sv_clean_all() > 2)
1081 AvREAL_off(PL_fdpid); /* no surviving entries */
1082 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1085 #ifdef HAVE_INTERP_INTERN
1089 /* Destruct the global string table. */
1091 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1092 * so that sv_free() won't fail on them.
1093 * Now that the global string table is using a single hunk of memory
1094 * for both HE and HEK, we either need to explicitly unshare it the
1095 * correct way, or actually free things here.
1098 const I32 max = HvMAX(PL_strtab);
1099 HE * const * const array = HvARRAY(PL_strtab);
1100 HE *hent = array[0];
1103 if (hent && ckWARN_d(WARN_INTERNAL)) {
1104 HE * const next = HeNEXT(hent);
1105 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1106 "Unbalanced string table refcount: (%ld) for \"%s\"",
1107 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1114 hent = array[riter];
1119 HvARRAY(PL_strtab) = 0;
1120 HvTOTALKEYS(PL_strtab) = 0;
1122 SvREFCNT_dec(PL_strtab);
1125 /* free the pointer tables used for cloning */
1126 ptr_table_free(PL_ptr_table);
1127 PL_ptr_table = (PTR_TBL_t*)NULL;
1130 /* free special SVs */
1132 SvREFCNT(&PL_sv_yes) = 0;
1133 sv_clear(&PL_sv_yes);
1134 SvANY(&PL_sv_yes) = NULL;
1135 SvFLAGS(&PL_sv_yes) = 0;
1137 SvREFCNT(&PL_sv_no) = 0;
1138 sv_clear(&PL_sv_no);
1139 SvANY(&PL_sv_no) = NULL;
1140 SvFLAGS(&PL_sv_no) = 0;
1144 for (i=0; i<=2; i++) {
1145 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1146 sv_clear(PERL_DEBUG_PAD(i));
1147 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1148 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1152 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1153 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1155 #ifdef DEBUG_LEAKING_SCALARS
1156 if (PL_sv_count != 0) {
1161 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1162 svend = &sva[SvREFCNT(sva)];
1163 for (sv = sva + 1; sv < svend; ++sv) {
1164 if (SvTYPE(sv) != SVTYPEMASK) {
1165 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1167 " refcnt=%"UVuf pTHX__FORMAT "\n"
1168 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1170 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1172 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1174 sv->sv_debug_inpad ? "for" : "by",
1175 sv->sv_debug_optype ?
1176 PL_op_name[sv->sv_debug_optype]: "(none)",
1177 PTR2UV(sv->sv_debug_parent),
1180 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1181 Perl_dump_sv_child(aTHX_ sv);
1187 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1191 /* Wait for up to 4 seconds for child to terminate.
1192 This seems to be the least effort way of timing out on reaping
1194 struct timeval waitfor = {4, 0};
1195 int sock = PL_dumper_fd;
1199 FD_SET(sock, &rset);
1200 select(sock + 1, &rset, NULL, NULL, &waitfor);
1201 waitpid(child, &status, WNOHANG);
1206 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1212 #ifdef PERL_DEBUG_READONLY_OPS
1218 #if defined(PERLIO_LAYERS)
1219 /* No more IO - including error messages ! */
1220 PerlIO_cleanup(aTHX);
1223 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1224 as currently layers use it rather than NULL as a marker
1225 for no arg - and will try and SvREFCNT_dec it.
1227 SvREFCNT(&PL_sv_undef) = 0;
1228 SvREADONLY_off(&PL_sv_undef);
1230 Safefree(PL_origfilename);
1231 PL_origfilename = NULL;
1232 Safefree(PL_reg_start_tmp);
1233 PL_reg_start_tmp = (char**)NULL;
1234 PL_reg_start_tmpl = 0;
1235 Safefree(PL_reg_curpm);
1236 Safefree(PL_reg_poscache);
1237 free_tied_hv_pool();
1238 Safefree(PL_op_mask);
1239 Safefree(PL_psig_name);
1240 PL_psig_name = (SV**)NULL;
1241 PL_psig_ptr = (SV**)NULL;
1243 /* We need to NULL PL_psig_pend first, so that
1244 signal handlers know not to use it */
1245 int *psig_save = PL_psig_pend;
1246 PL_psig_pend = (int*)NULL;
1247 Safefree(psig_save);
1251 PL_tainting = FALSE;
1252 PL_taint_warn = FALSE;
1253 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1256 DEBUG_P(debprofdump());
1258 #ifdef USE_REENTRANT_API
1259 Perl_reentrant_free(aTHX);
1264 while (PL_regmatch_slab) {
1265 regmatch_slab *s = PL_regmatch_slab;
1266 PL_regmatch_slab = PL_regmatch_slab->next;
1270 /* As the absolutely last thing, free the non-arena SV for mess() */
1273 /* we know that type == SVt_PVMG */
1275 /* it could have accumulated taint magic */
1278 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1279 moremagic = mg->mg_moremagic;
1280 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1282 Safefree(mg->mg_ptr);
1286 /* we know that type >= SVt_PV */
1287 SvPV_free(PL_mess_sv);
1288 Safefree(SvANY(PL_mess_sv));
1289 Safefree(PL_mess_sv);
1296 =for apidoc perl_free
1298 Releases a Perl interpreter. See L<perlembed>.
1308 PERL_ARGS_ASSERT_PERL_FREE;
1310 if (PL_veto_cleanup)
1313 #ifdef PERL_TRACK_MEMPOOL
1316 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1317 * value as we're probably hunting memory leaks then
1319 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1320 if (!s || atoi(s) == 0) {
1321 const U32 old_debug = PL_debug;
1322 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1323 thread at thread exit. */
1325 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1326 "free this thread's memory\n");
1327 PL_debug &= ~ DEBUG_m_FLAG;
1329 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1330 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1331 PL_debug = old_debug;
1336 #if defined(WIN32) || defined(NETWARE)
1337 # if defined(PERL_IMPLICIT_SYS)
1340 void *host = nw_internal_host;
1342 void *host = w32_internal_host;
1344 PerlMem_free(aTHXx);
1346 nw_delete_internal_host(host);
1348 win32_delete_internal_host(host);
1352 PerlMem_free(aTHXx);
1355 PerlMem_free(aTHXx);
1359 #if defined(USE_ITHREADS)
1360 /* provide destructors to clean up the thread key when libperl is unloaded */
1361 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1363 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1364 #pragma fini "perl_fini"
1365 #elif defined(__sun) && !defined(__GNUC__)
1366 #pragma fini (perl_fini)
1370 #if defined(__GNUC__)
1371 __attribute__((destructor))
1376 if (PL_curinterp && !PL_veto_cleanup)
1381 #endif /* THREADS */
1384 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1387 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1388 PL_exitlist[PL_exitlistlen].fn = fn;
1389 PL_exitlist[PL_exitlistlen].ptr = ptr;
1393 #ifdef HAS_PROCSELFEXE
1394 /* This is a function so that we don't hold on to MAXPATHLEN
1395 bytes of stack longer than necessary
1398 S_procself_val(pTHX_ SV *sv, const char *arg0)
1400 char buf[MAXPATHLEN];
1401 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1403 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1404 includes a spurious NUL which will cause $^X to fail in system
1405 or backticks (this will prevent extensions from being built and
1406 many tests from working). readlink is not meant to add a NUL.
1407 Normal readlink works fine.
1409 if (len > 0 && buf[len-1] == '\0') {
1413 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1414 returning the text "unknown" from the readlink rather than the path
1415 to the executable (or returning an error from the readlink). Any valid
1416 path has a '/' in it somewhere, so use that to validate the result.
1417 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1419 if (len > 0 && memchr(buf, '/', len)) {
1420 sv_setpvn(sv,buf,len);
1426 #endif /* HAS_PROCSELFEXE */
1429 S_set_caret_X(pTHX) {
1431 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1433 #ifdef HAS_PROCSELFEXE
1434 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1437 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1439 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1446 =for apidoc perl_parse
1448 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1454 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1461 PERL_ARGS_ASSERT_PERL_PARSE;
1462 #ifndef MULTIPLICITY
1463 PERL_UNUSED_ARG(my_perl);
1466 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1467 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1468 * This MUST be done before any hash stores or fetches take place.
1469 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1470 * yourself, it is your responsibility to provide a good random seed!
1471 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1472 if (!PL_rehash_seed_set)
1473 PL_rehash_seed = get_hash_seed();
1475 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1477 if (s && (atoi(s) == 1))
1478 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1480 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1485 if (PL_origalen != 0) {
1486 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1489 /* Set PL_origalen be the sum of the contiguous argv[]
1490 * elements plus the size of the env in case that it is
1491 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1492 * as the maximum modifiable length of $0. In the worst case
1493 * the area we are able to modify is limited to the size of
1494 * the original argv[0]. (See below for 'contiguous', though.)
1496 const char *s = NULL;
1499 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1500 /* Do the mask check only if the args seem like aligned. */
1502 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1504 /* See if all the arguments are contiguous in memory. Note
1505 * that 'contiguous' is a loose term because some platforms
1506 * align the argv[] and the envp[]. If the arguments look
1507 * like non-aligned, assume that they are 'strictly' or
1508 * 'traditionally' contiguous. If the arguments look like
1509 * aligned, we just check that they are within aligned
1510 * PTRSIZE bytes. As long as no system has something bizarre
1511 * like the argv[] interleaved with some other data, we are
1512 * fine. (Did I just evoke Murphy's Law?) --jhi */
1513 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1515 for (i = 1; i < PL_origargc; i++) {
1516 if ((PL_origargv[i] == s + 1
1518 || PL_origargv[i] == s + 2
1523 (PL_origargv[i] > s &&
1525 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1536 #ifndef PERL_USE_SAFE_PUTENV
1537 /* Can we grab env area too to be used as the area for $0? */
1538 if (s && PL_origenviron && !PL_use_safe_putenv) {
1539 if ((PL_origenviron[0] == s + 1)
1542 (PL_origenviron[0] > s &&
1543 PL_origenviron[0] <=
1544 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1547 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1548 s = PL_origenviron[0];
1551 my_setenv("NoNe SuCh", NULL);
1552 /* Force copy of environment. */
1553 for (i = 1; PL_origenviron[i]; i++) {
1554 if (PL_origenviron[i] == s + 1
1557 (PL_origenviron[i] > s &&
1558 PL_origenviron[i] <=
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1562 s = PL_origenviron[i];
1570 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1572 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1577 /* Come here if running an undumped a.out. */
1579 PL_origfilename = savepv(argv[0]);
1580 PL_do_undump = FALSE;
1581 cxstack_ix = -1; /* start label stack again */
1583 assert (!PL_tainted);
1585 S_set_caret_X(aTHX);
1587 init_postdump_symbols(argc,argv,env);
1592 op_free(PL_main_root);
1593 PL_main_root = NULL;
1595 PL_main_start = NULL;
1596 SvREFCNT_dec(PL_main_cv);
1600 oldscope = PL_scopestack_ix;
1601 PL_dowarn = G_WARN_OFF;
1606 parse_body(env,xsinit);
1608 call_list(oldscope, PL_unitcheckav);
1610 call_list(oldscope, PL_checkav);
1617 /* my_exit() was called */
1618 while (PL_scopestack_ix > oldscope)
1621 PL_curstash = PL_defstash;
1623 call_list(oldscope, PL_unitcheckav);
1625 call_list(oldscope, PL_checkav);
1629 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1637 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1638 miniperl, and we need to see those flags reflected in the values here. */
1640 /* What this returns is subject to change. Use the public interface in Config.
1643 S_Internals_V(pTHX_ CV *cv)
1646 #ifdef LOCAL_PATCH_COUNT
1647 const int local_patch_count = LOCAL_PATCH_COUNT;
1649 const int local_patch_count = 0;
1651 const int entries = 3 + local_patch_count;
1653 static char non_bincompat_options[] =
1660 # ifdef PERL_DISABLE_PMC
1663 # ifdef PERL_DONT_CREATE_GVSV
1664 " PERL_DONT_CREATE_GVSV"
1666 # ifdef PERL_EXTERNAL_GLOB
1667 " PERL_EXTERNAL_GLOB"
1669 # ifdef PERL_IS_MINIPERL
1672 # ifdef PERL_MALLOC_WRAP
1675 # ifdef PERL_MEM_LOG
1678 # ifdef PERL_MEM_LOG_NOIMPL
1679 " PERL_MEM_LOG_NOIMPL"
1681 # ifdef PERL_USE_DEVEL
1684 # ifdef PERL_USE_SAFE_PUTENV
1685 " PERL_USE_SAFE_PUTENV"
1687 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1688 " USE_ATTRIBUTES_FOR_PERLIO"
1690 # ifdef USE_FAST_STDIO
1693 # ifdef USE_PERL_ATOF
1696 # ifdef USE_SITECUSTOMIZE
1697 " USE_SITECUSTOMIZE"
1700 PERL_UNUSED_ARG(cv);
1701 PERL_UNUSED_ARG(items);
1703 EXTEND(SP, entries);
1705 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1706 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1707 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1711 PUSHs(Perl_newSVpvn_flags(aTHX_
1712 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1715 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1719 PUSHs(&PL_sv_undef);
1722 for (i = 1; i <= local_patch_count; i++) {
1723 /* This will be an undef, if PL_localpatches[i] is NULL. */
1724 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1730 #define INCPUSH_UNSHIFT 0x01
1731 #define INCPUSH_ADD_OLD_VERS 0x02
1732 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1733 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1734 #define INCPUSH_NOT_BASEDIR 0x10
1735 #define INCPUSH_CAN_RELOCATE 0x20
1736 #define INCPUSH_ADD_SUB_DIRS \
1737 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1740 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1744 int argc = PL_origargc;
1745 char **argv = PL_origargv;
1746 const char *scriptname = NULL;
1747 VOL bool dosearch = FALSE;
1749 const char *cddir = NULL;
1750 #ifdef USE_SITECUSTOMIZE
1751 bool minus_f = FALSE;
1753 SV *linestr_sv = newSV_type(SVt_PVIV);
1754 bool add_read_e_script = FALSE;
1756 SvGROW(linestr_sv, 80);
1757 sv_setpvs(linestr_sv,"");
1763 for (argc--,argv++; argc > 0; argc--,argv++) {
1764 if (argv[0][0] != '-' || !argv[0][1])
1770 #ifndef PERL_STRICT_CR
1794 if ((s = moreswitches(s)))
1799 CHECK_MALLOC_TOO_LATE_FOR('t');
1800 if( !PL_tainting ) {
1801 PL_taint_warn = TRUE;
1807 CHECK_MALLOC_TOO_LATE_FOR('T');
1809 PL_taint_warn = FALSE;
1817 forbid_setid('e', FALSE);
1819 PL_e_script = newSVpvs("");
1820 add_read_e_script = TRUE;
1823 sv_catpv(PL_e_script, s);
1825 sv_catpv(PL_e_script, argv[1]);
1829 Perl_croak(aTHX_ "No code specified for -%c", c);
1830 sv_catpvs(PL_e_script, "\n");
1834 #ifdef USE_SITECUSTOMIZE
1840 case 'I': /* -I handled both here and in moreswitches() */
1841 forbid_setid('I', FALSE);
1842 if (!*++s && (s=argv[1]) != NULL) {
1846 STRLEN len = strlen(s);
1847 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1850 Perl_croak(aTHX_ "No directory specified for -I");
1853 forbid_setid('S', FALSE);
1862 opts_prog = newSVpvs("use Config; Config::_V()");
1866 opts_prog = Perl_newSVpvf(aTHX_
1867 "use Config; Config::config_vars(qw%c%s%c)",
1871 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1872 /* don't look for script or read stdin */
1873 scriptname = BIT_BUCKET;
1877 PL_doextract = TRUE;
1885 if (!*++s || isSPACE(*s)) {
1889 /* catch use of gnu style long options */
1890 if (strEQ(s, "version")) {
1894 if (strEQ(s, "help")) {
1901 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1912 #ifndef SECURE_INTERNAL_GETENV
1915 (s = PerlEnv_getenv("PERL5OPT")))
1919 if (*s == '-' && *(s+1) == 'T') {
1920 CHECK_MALLOC_TOO_LATE_FOR('T');
1922 PL_taint_warn = FALSE;
1925 char *popt_copy = NULL;
1938 if (!strchr("CDIMUdmtwW", *s))
1939 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1943 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1944 s = popt_copy + (s - d);
1952 if( !PL_tainting ) {
1953 PL_taint_warn = TRUE;
1964 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1966 /* SITELIB_EXP is a function call on Win32.
1967 The games with local $! are to avoid setting errno if there is no
1968 sitecustomize script. */
1969 const char *const sitelib = SITELIB_EXP;
1970 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1972 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1977 scriptname = argv[0];
1980 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1982 else if (scriptname == NULL) {
1984 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1990 /* Set $^X early so that it can be used for relocatable paths in @INC */
1991 assert (!PL_tainted);
1993 S_set_caret_X(aTHX);
1998 bool suidscript = FALSE;
2000 open_script(scriptname, dosearch, &suidscript, &rsfp);
2002 validate_suid(validarg, scriptname, fdscript, suidscript,
2006 # if defined(SIGCHLD) || defined(SIGCLD)
2009 # define SIGCHLD SIGCLD
2011 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2012 if (sigstate == (Sighandler_t) SIG_IGN) {
2013 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2014 "Can't ignore signal CHLD, forcing to default");
2015 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2023 /* This will croak if suidscript is true, as -x cannot be used with
2025 forbid_setid('x', suidscript);
2026 /* Hence you can't get here if suidscript is true */
2028 find_beginning(linestr_sv, rsfp);
2029 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2030 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2034 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2035 CvUNIQUE_on(PL_compcv);
2037 CvPADLIST(PL_compcv) = pad_new(0);
2039 PL_isarev = newHV();
2042 boot_core_UNIVERSAL();
2044 newXS("Internals::V", S_Internals_V, __FILE__);
2047 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2049 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2055 # ifdef HAS_SOCKS5_INIT
2056 socks5_init(argv[0]);
2062 init_predump_symbols();
2063 /* init_postdump_symbols not currently designed to be called */
2064 /* more than once (ENV isn't cleared first, for example) */
2065 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2067 init_postdump_symbols(argc,argv,env);
2069 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2070 * or explicitly in some platforms.
2071 * locale.c:Perl_init_i18nl10n() if the environment
2072 * look like the user wants to use UTF-8. */
2073 #if defined(__SYMBIAN32__)
2074 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2076 # ifndef PERL_IS_MINIPERL
2078 /* Requires init_predump_symbols(). */
2079 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2084 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2085 * and the default open disciplines. */
2086 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2087 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2089 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2090 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2091 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2093 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2094 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2095 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2097 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2098 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2099 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2101 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2102 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2105 sv_setpvs(sv, ":utf8\0:utf8");
2107 sv_setpvs(sv, ":utf8\0");
2110 sv_setpvs(sv, "\0:utf8");
2119 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2120 if (strEQ(s, "unsafe"))
2121 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2122 else if (strEQ(s, "safe"))
2123 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2125 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2132 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2136 PL_xmlfp = PerlIO_stdout();
2138 PL_xmlfp = PerlIO_open(s, "w");
2140 Perl_croak(aTHX_ "Can't open %s", s);
2142 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2148 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2149 PL_madskills = atoi(s);
2150 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2155 lex_start(linestr_sv, rsfp, TRUE);
2156 PL_subname = newSVpvs("main");
2158 if (add_read_e_script)
2159 filter_add(read_e_script, NULL);
2161 /* now parse the script */
2163 SETERRNO(0,SS_NORMAL);
2164 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2166 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2168 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2172 CopLINE_set(PL_curcop, 0);
2173 PL_curstash = PL_defstash;
2175 SvREFCNT_dec(PL_e_script);
2183 SAVECOPFILE(PL_curcop);
2184 SAVECOPLINE(PL_curcop);
2185 gv_check(PL_defstash);
2194 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2195 dump_mstats("after compilation:");
2200 PL_restartjmpenv = NULL;
2206 =for apidoc perl_run
2208 Tells a Perl interpreter to run. See L<perlembed>.
2221 PERL_ARGS_ASSERT_PERL_RUN;
2222 #ifndef MULTIPLICITY
2223 PERL_UNUSED_ARG(my_perl);
2226 oldscope = PL_scopestack_ix;
2234 cxstack_ix = -1; /* start context stack again */
2236 case 0: /* normal completion */
2240 case 2: /* my_exit() */
2241 while (PL_scopestack_ix > oldscope)
2244 PL_curstash = PL_defstash;
2245 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2246 PL_endav && !PL_minus_c)
2247 call_list(oldscope, PL_endav);
2249 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2250 dump_mstats("after execution: ");
2256 POPSTACK_TO(PL_mainstack);
2259 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2270 S_run_body(pTHX_ I32 oldscope)
2273 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2274 PL_sawampersand ? "Enabling" : "Omitting"));
2276 if (!PL_restartop) {
2280 exit(0); /* less likely to core dump than my_exit(0) */
2284 if (DEBUG_x_TEST || DEBUG_B_TEST)
2285 dump_all_perl(!DEBUG_B_TEST);
2287 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2291 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2294 if (PERLDB_SINGLE && PL_DBsingle)
2295 sv_setiv(PL_DBsingle, 1);
2297 call_list(oldscope, PL_initav);
2298 #ifdef PERL_DEBUG_READONLY_OPS
2299 Perl_pending_Slabs_to_ro(aTHX);
2306 PL_restartjmpenv = NULL;
2307 PL_op = PL_restartop;
2311 else if (PL_main_start) {
2312 CvDEPTH(PL_main_cv) = 1;
2313 PL_op = PL_main_start;
2321 =head1 SV Manipulation Functions
2323 =for apidoc p||get_sv
2325 Returns the SV of the specified Perl scalar. C<flags> are passed to
2326 C<gv_fetchpv>. If C<GV_ADD> is set and the
2327 Perl variable does not exist then it will be created. If C<flags> is zero
2328 and the variable does not exist then NULL is returned.
2334 Perl_get_sv(pTHX_ const char *name, I32 flags)
2338 PERL_ARGS_ASSERT_GET_SV;
2340 gv = gv_fetchpv(name, flags, SVt_PV);
2347 =head1 Array Manipulation Functions
2349 =for apidoc p||get_av
2351 Returns the AV of the specified Perl array. C<flags> are passed to
2352 C<gv_fetchpv>. If C<GV_ADD> is set and the
2353 Perl variable does not exist then it will be created. If C<flags> is zero
2354 and the variable does not exist then NULL is returned.
2360 Perl_get_av(pTHX_ const char *name, I32 flags)
2362 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2364 PERL_ARGS_ASSERT_GET_AV;
2374 =head1 Hash Manipulation Functions
2376 =for apidoc p||get_hv
2378 Returns the HV of the specified Perl hash. C<flags> are passed to
2379 C<gv_fetchpv>. If C<GV_ADD> is set and the
2380 Perl variable does not exist then it will be created. If C<flags> is zero
2381 and the variable does not exist then NULL is returned.
2387 Perl_get_hv(pTHX_ const char *name, I32 flags)
2389 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2391 PERL_ARGS_ASSERT_GET_HV;
2401 =head1 CV Manipulation Functions
2403 =for apidoc p||get_cvn_flags
2405 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2406 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2407 exist then it will be declared (which has the same effect as saying
2408 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2409 then NULL is returned.
2411 =for apidoc p||get_cv
2413 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2419 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2421 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2422 /* XXX this is probably not what they think they're getting.
2423 * It has the same effect as "sub name;", i.e. just a forward
2426 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2428 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2429 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2430 return newSUB(start_subparse(FALSE, 0),
2431 newSVOP(OP_CONST, 0, sv),
2439 /* Nothing in core calls this now, but we can't replace it with a macro and
2440 move it to mathoms.c as a macro would evaluate name twice. */
2442 Perl_get_cv(pTHX_ const char *name, I32 flags)
2444 PERL_ARGS_ASSERT_GET_CV;
2446 return get_cvn_flags(name, strlen(name), flags);
2449 /* Be sure to refetch the stack pointer after calling these routines. */
2453 =head1 Callback Functions
2455 =for apidoc p||call_argv
2457 Performs a callback to the specified Perl sub. See L<perlcall>.
2463 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2465 /* See G_* flags in cop.h */
2466 /* null terminated arg list */
2471 PERL_ARGS_ASSERT_CALL_ARGV;
2476 mXPUSHs(newSVpv(*argv,0));
2481 return call_pv(sub_name, flags);
2485 =for apidoc p||call_pv
2487 Performs a callback to the specified Perl sub. See L<perlcall>.
2493 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2494 /* name of the subroutine */
2495 /* See G_* flags in cop.h */
2497 PERL_ARGS_ASSERT_CALL_PV;
2499 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2503 =for apidoc p||call_method
2505 Performs a callback to the specified Perl method. The blessed object must
2506 be on the stack. See L<perlcall>.
2512 Perl_call_method(pTHX_ const char *methname, I32 flags)
2513 /* name of the subroutine */
2514 /* See G_* flags in cop.h */
2517 PERL_ARGS_ASSERT_CALL_METHOD;
2519 len = strlen(methname);
2521 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2522 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2525 /* May be called with any of a CV, a GV, or an SV containing the name. */
2527 =for apidoc p||call_sv
2529 Performs a callback to the Perl sub whose name is in the SV. See
2536 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2537 /* See G_* flags in cop.h */
2540 LOGOP myop; /* fake syntax tree node */
2545 bool oldcatch = CATCH_GET;
2547 OP* const oldop = PL_op;
2550 PERL_ARGS_ASSERT_CALL_SV;
2552 if (flags & G_DISCARD) {
2556 if (!(flags & G_WANT)) {
2557 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2562 Zero(&myop, 1, LOGOP);
2563 myop.op_next = NULL;
2564 if (!(flags & G_NOARGS))
2565 myop.op_flags |= OPf_STACKED;
2566 myop.op_flags |= OP_GIMME_REVERSE(flags);
2570 EXTEND(PL_stack_sp, 1);
2571 *++PL_stack_sp = sv;
2573 oldscope = PL_scopestack_ix;
2575 if (PERLDB_SUB && PL_curstash != PL_debstash
2576 /* Handle first BEGIN of -d. */
2577 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2578 /* Try harder, since this may have been a sighandler, thus
2579 * curstash may be meaningless. */
2580 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2581 && !(flags & G_NODEBUG))
2582 PL_op->op_private |= OPpENTERSUB_DB;
2584 if (flags & G_METHOD) {
2585 Zero(&method_op, 1, UNOP);
2586 method_op.op_next = PL_op;
2587 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2588 method_op.op_type = OP_METHOD;
2589 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2590 myop.op_type = OP_ENTERSUB;
2591 PL_op = (OP*)&method_op;
2594 if (!(flags & G_EVAL)) {
2596 CALL_BODY_SUB((OP*)&myop);
2597 retval = PL_stack_sp - (PL_stack_base + oldmark);
2598 CATCH_SET(oldcatch);
2601 myop.op_other = (OP*)&myop;
2603 create_eval_scope(flags|G_FAKINGEVAL);
2611 CALL_BODY_SUB((OP*)&myop);
2612 retval = PL_stack_sp - (PL_stack_base + oldmark);
2613 if (!(flags & G_KEEPERR)) {
2621 /* my_exit() was called */
2622 PL_curstash = PL_defstash;
2629 PL_restartjmpenv = NULL;
2630 PL_op = PL_restartop;
2634 PL_stack_sp = PL_stack_base + oldmark;
2635 if ((flags & G_WANT) == G_ARRAY)
2639 *++PL_stack_sp = &PL_sv_undef;
2644 if (PL_scopestack_ix > oldscope)
2645 delete_eval_scope();
2649 if (flags & G_DISCARD) {
2650 PL_stack_sp = PL_stack_base + oldmark;
2659 /* Eval a string. The G_EVAL flag is always assumed. */
2662 =for apidoc p||eval_sv
2664 Tells Perl to C<eval> the string in the SV. It supports the same flags
2665 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2671 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2673 /* See G_* flags in cop.h */
2677 UNOP myop; /* fake syntax tree node */
2678 VOL I32 oldmark = SP - PL_stack_base;
2681 OP* const oldop = PL_op;
2684 PERL_ARGS_ASSERT_EVAL_SV;
2686 if (flags & G_DISCARD) {
2693 Zero(PL_op, 1, UNOP);
2694 EXTEND(PL_stack_sp, 1);
2695 *++PL_stack_sp = sv;
2697 if (!(flags & G_NOARGS))
2698 myop.op_flags = OPf_STACKED;
2699 myop.op_next = NULL;
2700 myop.op_type = OP_ENTEREVAL;
2701 myop.op_flags |= OP_GIMME_REVERSE(flags);
2702 if (flags & G_KEEPERR)
2703 myop.op_flags |= OPf_SPECIAL;
2705 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2706 * before a PUSHEVAL, which corrupts the stack after a croak */
2707 TAINT_PROPER("eval_sv()");
2713 if (PL_op == (OP*)(&myop)) {
2714 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2716 goto fail; /* failed in compilation */
2719 retval = PL_stack_sp - (PL_stack_base + oldmark);
2720 if (!(flags & G_KEEPERR)) {
2728 /* my_exit() was called */
2729 PL_curstash = PL_defstash;
2736 PL_restartjmpenv = NULL;
2737 PL_op = PL_restartop;
2742 PL_stack_sp = PL_stack_base + oldmark;
2743 if ((flags & G_WANT) == G_ARRAY)
2747 *++PL_stack_sp = &PL_sv_undef;
2753 if (flags & G_DISCARD) {
2754 PL_stack_sp = PL_stack_base + oldmark;
2764 =for apidoc p||eval_pv
2766 Tells Perl to C<eval> the given string and return an SV* result.
2772 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2776 SV* sv = newSVpv(p, 0);
2778 PERL_ARGS_ASSERT_EVAL_PV;
2780 eval_sv(sv, G_SCALAR);
2787 if (croak_on_error && SvTRUE(ERRSV)) {
2788 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2794 /* Require a module. */
2797 =head1 Embedding Functions
2799 =for apidoc p||require_pv
2801 Tells Perl to C<require> the file named by the string argument. It is
2802 analogous to the Perl code C<eval "require '$file'">. It's even
2803 implemented that way; consider using load_module instead.
2808 Perl_require_pv(pTHX_ const char *pv)
2814 PERL_ARGS_ASSERT_REQUIRE_PV;
2816 PUSHSTACKi(PERLSI_REQUIRE);
2818 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2819 eval_sv(sv_2mortal(sv), G_DISCARD);
2825 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2827 /* This message really ought to be max 23 lines.
2828 * Removed -h because the user already knows that option. Others? */
2830 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2831 minimum of 509 character string literals. */
2832 static const char * const usage_msg[] = {
2833 " -0[octal] specify record separator (\\0, if no argument)\n"
2834 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2835 " -C[number/list] enables the listed Unicode features\n"
2836 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2837 " -d[:debugger] run program under debugger\n"
2838 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2839 " -e program one line of program (several -e's allowed, omit programfile)\n"
2840 " -E program like -e, but enables all optional features\n"
2841 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2842 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2843 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2844 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2845 " -l[octal] enable line ending processing, specifies line terminator\n"
2846 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2847 " -n assume \"while (<>) { ... }\" loop around program\n"
2848 " -p assume loop like -n but print line also, like sed\n"
2849 " -s enable rudimentary parsing for switches after programfile\n"
2850 " -S look for programfile using PATH environment variable\n",
2851 " -t enable tainting warnings\n"
2852 " -T enable tainting checks\n"
2853 " -u dump core after parsing program\n"
2854 " -U allow unsafe operations\n"
2855 " -v print version, patchlevel and license\n"
2856 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2857 " -w enable many useful warnings\n"
2858 " -W enable all warnings\n"
2859 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2860 " -X disable all warnings\n"
2862 "Run 'perldoc perl' for more help with Perl.\n\n",
2865 const char * const *p = usage_msg;
2866 PerlIO *out = PerlIO_stdout();
2868 PERL_ARGS_ASSERT_USAGE;
2871 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2874 PerlIO_puts(out, *p++);
2877 /* convert a string of -D options (or digits) into an int.
2878 * sets *s to point to the char after the options */
2882 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2884 static const char * const usage_msgd[] = {
2885 " Debugging flag values: (see also -d)\n"
2886 " p Tokenizing and parsing (with v, displays parse stack)\n"
2887 " s Stack snapshots (with v, displays all stacks)\n"
2888 " l Context (loop) stack processing\n"
2889 " t Trace execution\n"
2890 " o Method and overloading resolution\n",
2891 " c String/numeric conversions\n"
2892 " P Print profiling info, source file input state\n"
2893 " m Memory and SV allocation\n"
2894 " f Format processing\n"
2895 " r Regular expression parsing and execution\n"
2896 " x Syntax tree dump\n",
2897 " u Tainting checks\n"
2898 " H Hash dump -- usurps values()\n"
2899 " X Scratchpad allocation\n"
2902 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2903 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2904 " v Verbose: use in conjunction with other flags\n"
2905 " C Copy On Write\n"
2906 " A Consistency checks on internal structures\n"
2907 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2908 " M trace smart match resolution\n"
2909 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2914 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2917 /* if adding extra options, remember to update DEBUG_MASK */
2918 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2920 for (; isALNUM(**s); (*s)++) {
2921 const char * const d = strchr(debopts,**s);
2923 i |= 1 << (d - debopts);
2924 else if (ckWARN_d(WARN_DEBUGGING))
2925 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2926 "invalid option -D%c, use -D'' to see choices\n", **s);
2929 else if (isDIGIT(**s)) {
2931 for (; isALNUM(**s); (*s)++) ;
2933 else if (givehelp) {
2934 const char *const *p = usage_msgd;
2935 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2938 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2939 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2940 "-Dp not implemented on this platform\n");
2946 /* This routine handles any switches that can be given during run */
2949 Perl_moreswitches(pTHX_ const char *s)
2953 const char option = *s; /* used to remember option in -m/-M code */
2955 PERL_ARGS_ASSERT_MORESWITCHES;
2963 SvREFCNT_dec(PL_rs);
2964 if (s[1] == 'x' && s[2]) {
2965 const char *e = s+=2;
2971 flags = PERL_SCAN_SILENT_ILLDIGIT;
2972 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2973 if (s + numlen < e) {
2974 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2978 PL_rs = newSVpvs("");
2979 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2980 tmps = (U8*)SvPVX(PL_rs);
2981 uvchr_to_utf8(tmps, rschar);
2982 SvCUR_set(PL_rs, UNISKIP(rschar));
2987 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2988 if (rschar & ~((U8)~0))
2989 PL_rs = &PL_sv_undef;
2990 else if (!rschar && numlen >= 2)
2991 PL_rs = newSVpvs("");
2993 char ch = (char)rschar;
2994 PL_rs = newSVpvn(&ch, 1);
2997 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3002 PL_unicode = parse_unicode_opts( (const char **)&s );
3003 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3009 while (*s && !isSPACE(*s)) ++s;
3010 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3021 forbid_setid('d', FALSE);
3024 /* -dt indicates to the debugger that threads will be used */
3025 if (*s == 't' && !isALNUM(s[1])) {
3027 my_setenv("PERL5DB_THREADED", "1");
3030 /* The following permits -d:Mod to accepts arguments following an =
3031 in the fashion that -MSome::Mod does. */
3032 if (*s == ':' || *s == '=') {
3033 const char *start = ++s;
3034 const char *const end = s + strlen(s);
3035 SV * const sv = newSVpvs("use Devel::");
3037 /* We now allow -d:Module=Foo,Bar */
3038 while(isALNUM(*s) || *s==':') ++s;
3040 sv_catpvn(sv, start, end - start);
3042 sv_catpvn(sv, start, s-start);
3043 /* Don't use NUL as q// delimiter here, this string goes in the
3045 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3048 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3052 PL_perldb = PERLDB_ALL;
3059 forbid_setid('D', FALSE);
3061 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3062 #else /* !DEBUGGING */
3063 if (ckWARN_d(WARN_DEBUGGING))
3064 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3065 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3066 for (s++; isALNUM(*s); s++) ;
3071 usage(PL_origargv[0]);
3074 Safefree(PL_inplace);
3075 #if defined(__CYGWIN__) /* do backup extension automagically */
3076 if (*(s+1) == '\0') {
3077 PL_inplace = savepvs(".bak");
3080 #endif /* __CYGWIN__ */
3082 const char * const start = ++s;
3083 while (*s && !isSPACE(*s))
3086 PL_inplace = savepvn(start, s - start);
3090 if (*s == '-') /* Additional switches on #! line. */
3094 case 'I': /* -I handled both here and in parse_body() */
3095 forbid_setid('I', FALSE);
3097 while (*s && isSPACE(*s))
3102 /* ignore trailing spaces (possibly followed by other switches) */
3104 for (e = p; *e && !isSPACE(*e); e++) ;
3108 } while (*p && *p != '-');
3110 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3116 Perl_croak(aTHX_ "No directory specified for -I");
3122 SvREFCNT_dec(PL_ors_sv);
3128 PL_ors_sv = newSVpvs("\n");
3129 numlen = 3 + (*s == '0');
3130 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3134 if (RsPARA(PL_rs)) {
3135 PL_ors_sv = newSVpvs("\n\n");
3138 PL_ors_sv = newSVsv(PL_rs);
3143 forbid_setid('M', FALSE); /* XXX ? */
3146 forbid_setid('m', FALSE); /* XXX ? */
3151 const char *use = "use ";
3153 /* -M-foo == 'no foo' */
3154 /* Leading space on " no " is deliberate, to make both
3155 possibilities the same length. */
3156 if (*s == '-') { use = " no "; ++s; }
3157 sv = newSVpvn(use,4);
3159 /* We allow -M'Module qw(Foo Bar)' */
3160 while(isALNUM(*s) || *s==':') {
3169 Perl_croak(aTHX_ "Module name required with -%c option",
3172 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3173 "contains single ':'",
3174 (int)(s - start), start, option);
3175 end = s + strlen(s);
3177 sv_catpvn(sv, start, end - start);
3178 if (option == 'm') {
3180 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3181 sv_catpvs( sv, " ()");
3184 sv_catpvn(sv, start, s-start);
3185 /* Use NUL as q''-delimiter. */
3186 sv_catpvs(sv, " split(/,/,q\0");
3188 sv_catpvn(sv, s, end - s);
3189 sv_catpvs(sv, "\0)");
3192 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3195 Perl_croak(aTHX_ "Missing argument to -%c", option);
3206 forbid_setid('s', FALSE);
3207 PL_doswitches = TRUE;
3221 PL_do_undump = TRUE;
3229 if (!sv_derived_from(PL_patchlevel, "version"))
3230 upg_version(PL_patchlevel, TRUE);
3233 SV* level= vstringify(PL_patchlevel);
3234 #ifdef PERL_PATCHNUM
3235 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3236 SV *num = newSVpvs(PERL_PATCHNUM "*");
3238 SV *num = newSVpvs(PERL_PATCHNUM);
3241 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3242 SvREFCNT_dec(level);
3245 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3249 PerlIO_printf(PerlIO_stdout(),
3250 "\nThis is perl " STRINGIFY(PERL_REVISION)
3251 ", version " STRINGIFY(PERL_VERSION)
3252 ", subversion " STRINGIFY(PERL_SUBVERSION)
3253 " (%"SVf") built for " ARCHNAME, level
3255 SvREFCNT_dec(level);
3258 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3259 PerlIO_printf(PerlIO_stdout(),
3260 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3261 SVfARG(vstringify(PL_patchlevel))));
3262 PerlIO_printf(PerlIO_stdout(),
3263 Perl_form(aTHX_ " built under %s at %s %s\n",
3264 OSNAME, __DATE__, __TIME__));
3265 PerlIO_printf(PerlIO_stdout(),
3266 Perl_form(aTHX_ " OS Specific Release: %s\n",
3269 #if defined(LOCAL_PATCH_COUNT)
3270 if (LOCAL_PATCH_COUNT > 0)
3271 PerlIO_printf(PerlIO_stdout(),
3272 "\n(with %d registered patch%s, "
3273 "see perl -V for more detail)",
3275 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3278 PerlIO_printf(PerlIO_stdout(),
3279 "\n\nCopyright 1987-2010, Larry Wall\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3287 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3292 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "atariST series port, ++jrb bammi@cadence.com\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "EPOC port by Olaf Flebbe, 1999-2002\n");
3327 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3328 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3331 #ifdef __SYMBIAN32__
3332 PerlIO_printf(PerlIO_stdout(),
3333 "Symbian port by Nokia, 2004-2005\n");
3335 #ifdef BINARY_BUILD_NOTICE
3336 BINARY_BUILD_NOTICE;
3338 PerlIO_printf(PerlIO_stdout(),
3340 Perl may be copied only under the terms of either the Artistic License or the\n\
3341 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3342 Complete documentation for Perl, including FAQ lists, should be found on\n\
3343 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3344 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3347 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3348 PL_dowarn |= G_WARN_ON;
3353 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3354 if (!specialWARN(PL_compiling.cop_warnings))
3355 PerlMemShared_free(PL_compiling.cop_warnings);
3356 PL_compiling.cop_warnings = pWARN_ALL ;
3360 PL_dowarn = G_WARN_ALL_OFF;
3361 if (!specialWARN(PL_compiling.cop_warnings))
3362 PerlMemShared_free(PL_compiling.cop_warnings);
3363 PL_compiling.cop_warnings = pWARN_NONE ;
3370 if (s[0] == '-') /* Additional switches on #! line. */
3375 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3381 #ifdef ALTERNATE_SHEBANG
3382 case 'S': /* OS/2 needs -S on "extproc" line. */
3386 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3391 /* compliments of Tom Christiansen */
3393 /* unexec() can be found in the Gnu emacs distribution */
3394 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3397 Perl_my_unexec(pTHX)
3399 PERL_UNUSED_CONTEXT;
3401 SV * prog = newSVpv(BIN_EXP, 0);
3402 SV * file = newSVpv(PL_origfilename, 0);
3406 sv_catpvs(prog, "/perl");
3407 sv_catpvs(file, ".perldump");
3409 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3410 /* unexec prints msg to stderr in case of failure */
3411 PerlProc_exit(status);
3414 # include <lib$routines.h>
3415 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3416 # elif defined(WIN32) || defined(__CYGWIN__)
3417 Perl_croak(aTHX_ "dump is not supported");
3419 ABORT(); /* for use with undump */
3424 /* initialize curinterp */
3430 # define PERLVAR(var,type)
3431 # define PERLVARA(var,n,type)
3432 # if defined(PERL_IMPLICIT_CONTEXT)
3433 # define PERLVARI(var,type,init) aTHX->var = init;
3434 # define PERLVARIC(var,type,init) aTHX->var = init;
3436 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3437 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3439 # include "intrpvar.h"
3445 # define PERLVAR(var,type)
3446 # define PERLVARA(var,n,type)
3447 # define PERLVARI(var,type,init) PL_##var = init;
3448 # define PERLVARIC(var,type,init) PL_##var = init;
3449 # include "intrpvar.h"
3456 /* As these are inside a structure, PERLVARI isn't capable of initialising
3458 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3459 PL_reg_poscache = PL_reg_starttry = NULL;
3463 S_init_main_stash(pTHX)
3468 PL_curstash = PL_defstash = newHV();
3469 /* We know that the string "main" will be in the global shared string
3470 table, so it's a small saving to use it rather than allocate another
3472 PL_curstname = newSVpvs_share("main");
3473 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3474 /* If we hadn't caused another reference to "main" to be in the shared
3475 string table above, then it would be worth reordering these two,
3476 because otherwise all we do is delete "main" from it as a consequence
3477 of the SvREFCNT_dec, only to add it again with hv_name_set */
3478 SvREFCNT_dec(GvHV(gv));
3479 hv_name_set(PL_defstash, "main", 4, 0);
3480 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3482 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3484 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3485 GvMULTI_on(PL_incgv);
3486 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3487 GvMULTI_on(PL_hintgv);
3488 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3489 SvREFCNT_inc_simple_void(PL_defgv);
3490 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3491 SvREFCNT_inc_simple_void(PL_errgv);
3492 GvMULTI_on(PL_errgv);
3493 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3494 GvMULTI_on(PL_replgv);
3495 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3496 #ifdef PERL_DONT_CREATE_GVSV
3499 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3501 PL_curstash = PL_defstash;
3502 CopSTASH_set(&PL_compiling, PL_defstash);
3503 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3504 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3506 /* We must init $/ before switches are processed. */
3507 sv_setpvs(get_sv("/", GV_ADD), "\n");
3511 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3512 bool *suidscript, PerlIO **rsfpp)
3517 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3520 PL_origfilename = savepvs("-e");
3523 /* if find_script() returns, it returns a malloc()-ed value */
3524 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3526 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3527 const char *s = scriptname + 8;
3533 * Tell apart "normal" usage of fdscript, e.g.
3534 * with bash on FreeBSD:
3535 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3536 * from usage in suidperl.
3537 * Does any "normal" usage leave garbage after the number???
3538 * Is it a mistake to use a similar /dev/fd/ construct for
3543 * Be supersafe and do some sanity-checks.
3544 * Still, can we be sure we got the right thing?
3547 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3550 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3552 scriptname = savepv(s + 1);
3553 Safefree(PL_origfilename);
3554 PL_origfilename = (char *)scriptname;
3559 CopFILE_free(PL_curcop);
3560 CopFILE_set(PL_curcop, PL_origfilename);
3561 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3562 scriptname = (char *)"";
3563 if (fdscript >= 0) {
3564 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3565 # if defined(HAS_FCNTL) && defined(F_SETFD)
3567 /* ensure close-on-exec */
3568 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3571 else if (!*scriptname) {
3572 forbid_setid(0, *suidscript);
3573 *rsfpp = PerlIO_stdin();
3576 #ifdef FAKE_BIT_BUCKET
3577 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3578 * is called) and still have the "-e" work. (Believe it or not,
3579 * a /dev/null is required for the "-e" to work because source
3580 * filter magic is used to implement it. ) This is *not* a general
3581 * replacement for a /dev/null. What we do here is create a temp
3582 * file (an empty file), open up that as the script, and then
3583 * immediately close and unlink it. Close enough for jazz. */
3584 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3585 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3586 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3587 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3588 FAKE_BIT_BUCKET_TEMPLATE
3590 const char * const err = "Failed to create a fake bit bucket";
3591 if (strEQ(scriptname, BIT_BUCKET)) {
3592 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3593 int tmpfd = mkstemp(tmpname);
3595 scriptname = tmpname;
3598 Perl_croak(aTHX_ err);
3601 scriptname = mktemp(tmpname);
3603 Perl_croak(aTHX_ err);
3608 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3609 #ifdef FAKE_BIT_BUCKET
3610 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3611 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3612 && strlen(scriptname) == sizeof(tmpname) - 1) {
3615 scriptname = BIT_BUCKET;
3617 # if defined(HAS_FCNTL) && defined(F_SETFD)
3619 /* ensure close-on-exec */
3620 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3624 /* PSz 16 Sep 03 Keep neat error message */
3626 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3628 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3629 CopFILE(PL_curcop), Strerror(errno));
3635 * I_SYSSTATVFS HAS_FSTATVFS
3637 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3638 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3639 * here so that metaconfig picks them up. */
3642 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3643 /* Don't even need this function. */
3646 S_validate_suid(pTHX_ PerlIO *rsfp)
3648 PERL_ARGS_ASSERT_VALIDATE_SUID;
3650 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3653 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3654 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3656 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3659 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3660 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3661 /* not set-id, must be wrapped */
3664 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3667 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3671 register const char *s2;
3673 PERL_ARGS_ASSERT_FIND_BEGINNING;
3675 /* skip forward in input to the real script? */
3677 while (PL_doextract) {
3678 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3679 Perl_croak(aTHX_ "No Perl script found in input\n");
3681 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3682 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3683 PL_doextract = FALSE;
3684 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3686 while (*s == ' ' || *s == '\t') s++;
3688 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3689 || s2[-1] == '_') s2--;
3690 if (strnEQ(s2-4,"perl",4))
3691 while ((s = moreswitches(s)))
3703 PL_uid = PerlProc_getuid();
3704 PL_euid = PerlProc_geteuid();
3705 PL_gid = PerlProc_getgid();
3706 PL_egid = PerlProc_getegid();
3708 PL_uid |= PL_gid << 16;
3709 PL_euid |= PL_egid << 16;
3711 /* Should not happen: */
3712 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3713 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3716 * Should go by suidscript, not uid!=euid: why disallow
3717 * system("ls") in scripts run from setuid things?
3718 * Or, is this run before we check arguments and set suidscript?
3719 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3720 * (We never have suidscript, can we be sure to have fdscript?)
3721 * Or must then go by UID checks? See comments in forbid_setid also.
3725 /* This is used very early in the lifetime of the program,
3726 * before even the options are parsed, so PL_tainting has
3727 * not been initialized properly. */
3729 Perl_doing_taint(int argc, char *argv[], char *envp[])
3731 #ifndef PERL_IMPLICIT_SYS
3732 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3733 * before we have an interpreter-- and the whole point of this
3734 * function is to be called at such an early stage. If you are on
3735 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3736 * "tainted because running with altered effective ids', you'll
3737 * have to add your own checks somewhere in here. The two most
3738 * known samples of 'implicitness' are Win32 and NetWare, neither
3739 * of which has much of concept of 'uids'. */
3740 int uid = PerlProc_getuid();
3741 int euid = PerlProc_geteuid();
3742 int gid = PerlProc_getgid();
3743 int egid = PerlProc_getegid();
3750 if (uid && (euid != uid || egid != gid))
3752 #endif /* !PERL_IMPLICIT_SYS */
3753 /* This is a really primitive check; environment gets ignored only
3754 * if -T are the first chars together; otherwise one gets
3755 * "Too late" message. */
3756 if ( argc > 1 && argv[1][0] == '-'
3757 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3762 /* Passing the flag as a single char rather than a string is a slight space
3763 optimisation. The only message that isn't /^-.$/ is
3764 "program input from stdin", which is substituted in place of '\0', which
3765 could never be a command line flag. */
3767 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3770 char string[3] = "-x";
3771 const char *message = "program input from stdin";
3778 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3779 if (PL_euid != PL_uid)
3780 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3781 if (PL_egid != PL_gid)
3782 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3783 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3785 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3789 Perl_init_dbargs(pTHX)
3791 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3796 /* Someone has already created it.
3797 It might have entries, and if we just turn off AvREAL(), they will
3798 "leak" until global destruction. */
3801 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3805 Perl_init_debugger(pTHX)
3808 HV * const ostash = PL_curstash;
3810 PL_curstash = PL_debstash;
3812 Perl_init_dbargs(aTHX);
3813 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3814 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3815 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3816 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3817 if (!SvIOK(PL_DBsingle))
3818 sv_setiv(PL_DBsingle, 0);
3819 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3820 if (!SvIOK(PL_DBtrace))
3821 sv_setiv(PL_DBtrace, 0);
3822 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3823 if (!SvIOK(PL_DBsignal))
3824 sv_setiv(PL_DBsignal, 0);
3825 PL_curstash = ostash;
3828 #ifndef STRESS_REALLOC
3829 #define REASONABLE(size) (size)
3831 #define REASONABLE(size) (1) /* unreasonable */
3835 Perl_init_stacks(pTHX)
3838 /* start with 128-item stack and 8K cxstack */
3839 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3840 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3841 PL_curstackinfo->si_type = PERLSI_MAIN;
3842 PL_curstack = PL_curstackinfo->si_stack;
3843 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3845 PL_stack_base = AvARRAY(PL_curstack);
3846 PL_stack_sp = PL_stack_base;
3847 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3849 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3852 PL_tmps_max = REASONABLE(128);
3854 Newx(PL_markstack,REASONABLE(32),I32);
3855 PL_markstack_ptr = PL_markstack;
3856 PL_markstack_max = PL_markstack + REASONABLE(32);
3860 Newx(PL_scopestack,REASONABLE(32),I32);
3862 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3864 PL_scopestack_ix = 0;
3865 PL_scopestack_max = REASONABLE(32);
3867 Newx(PL_savestack,REASONABLE(128),ANY);
3868 PL_savestack_ix = 0;
3869 PL_savestack_max = REASONABLE(128);
3878 while (PL_curstackinfo->si_next)
3879 PL_curstackinfo = PL_curstackinfo->si_next;
3880 while (PL_curstackinfo) {
3881 PERL_SI *p = PL_curstackinfo->si_prev;
3882 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3883 Safefree(PL_curstackinfo->si_cxstack);
3884 Safefree(PL_curstackinfo);
3885 PL_curstackinfo = p;
3887 Safefree(PL_tmps_stack);
3888 Safefree(PL_markstack);
3889 Safefree(PL_scopestack);
3891 Safefree(PL_scopestack_name);
3893 Safefree(PL_savestack);
3897 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
3899 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
3900 AV *const isa = GvAVn(gv);
3903 PERL_ARGS_ASSERT_POPULATE_ISA;
3905 if(AvFILLp(isa) != -1)
3908 /* NOTE: No support for tied ISA */
3910 va_start(args, len);
3912 const char *const parent = va_arg(args, const char*);
3917 parent_len = va_arg(args, size_t);
3919 /* Arguments are supplied with a trailing :: */
3920 assert(parent_len > 2);
3921 assert(parent[parent_len - 1] == ':');
3922 assert(parent[parent_len - 2] == ':');
3923 av_push(isa, newSVpvn(parent, parent_len - 2));
3924 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
3931 S_init_predump_symbols(pTHX)
3937 sv_setpvs(get_sv("\"", GV_ADD), " ");
3938 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3941 /* Historically, PVIOs were blessed into IO::Handle, unless
3942 FileHandle was loaded, in which case they were blessed into
3943 that. Action at a distance.
3944 However, if we simply bless into IO::Handle, we break code
3945 that assumes that PVIOs will have (among others) a seek
3946 method. IO::File inherits from IO::Handle and IO::Seekable,
3947 and provides the needed methods. But if we simply bless into
3948 it, then we break code that assumed that by loading
3949 IO::Handle, *it* would work.
3950 So a compromise is to set up the correct @IO::File::ISA,
3951 so that code that does C<use IO::Handle>; will still work.
3954 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
3955 STR_WITH_LEN("IO::Handle::"),
3956 STR_WITH_LEN("IO::Seekable::"),
3957 STR_WITH_LEN("Exporter::"),
3960 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3961 GvMULTI_on(PL_stdingv);
3962 io = GvIOp(PL_stdingv);
3963 IoTYPE(io) = IoTYPE_RDONLY;
3964 IoIFP(io) = PerlIO_stdin();
3965 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3967 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3969 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3972 IoTYPE(io) = IoTYPE_WRONLY;
3973 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3975 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3977 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3979 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3980 GvMULTI_on(PL_stderrgv);
3981 io = GvIOp(PL_stderrgv);
3982 IoTYPE(io) = IoTYPE_WRONLY;
3983 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3984 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3986 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3988 PL_statname = newSV(0); /* last filename we did stat on */
3992 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3996 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3998 argc--,argv++; /* skip name of script */
3999 if (PL_doswitches) {
4000 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4004 if (argv[0][1] == '-' && !argv[0][2]) {
4008 if ((s = strchr(argv[0], '='))) {
4009 const char *const start_name = argv[0] + 1;
4010 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4011 TRUE, SVt_PV)), s + 1);
4014 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4017 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4018 GvMULTI_on(PL_argvgv);
4019 (void)gv_AVadd(PL_argvgv);
4020 av_clear(GvAVn(PL_argvgv));
4021 for (; argc > 0; argc--,argv++) {
4022 SV * const sv = newSVpv(argv[0],0);
4023 av_push(GvAVn(PL_argvgv),sv);
4024 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4025 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4028 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4029 (void)sv_utf8_decode(sv);
4035 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4040 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4042 PL_toptarget = newSV_type(SVt_PVFM);
4043 sv_setpvs(PL_toptarget, "");
4044 PL_bodytarget = newSV_type(SVt_PVFM);
4045 sv_setpvs(PL_bodytarget, "");
4046 PL_formtarget = PL_bodytarget;
4050 init_argv_symbols(argc,argv);
4052 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4053 sv_setpv(GvSV(tmpgv),PL_origfilename);
4055 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4057 bool env_is_not_environ;
4058 GvMULTI_on(PL_envgv);
4059 hv = GvHVn(PL_envgv);
4060 hv_magic(hv, NULL, PERL_MAGIC_env);
4062 #ifdef USE_ENVIRON_ARRAY
4063 /* Note that if the supplied env parameter is actually a copy
4064 of the global environ then it may now point to free'd memory
4065 if the environment has been modified since. To avoid this
4066 problem we treat env==NULL as meaning 'use the default'
4070 env_is_not_environ = env != environ;
4071 if (env_is_not_environ
4072 # ifdef USE_ITHREADS
4073 && PL_curinterp == aTHX
4082 for (; *env; env++) {
4085 if (!(s = strchr(old_var,'=')) || s == old_var)
4088 #if defined(MSDOS) && !defined(DJGPP)
4090 (void)strupr(old_var);
4093 sv = newSVpv(s+1, 0);
4094 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4095 if (env_is_not_environ)
4099 #endif /* USE_ENVIRON_ARRAY */
4100 #endif /* !PERL_MICRO */
4103 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4104 SvREADONLY_off(GvSV(tmpgv));
4105 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4106 SvREADONLY_on(GvSV(tmpgv));
4108 #ifdef THREADS_HAVE_PIDS
4109 PL_ppid = (IV)getppid();
4112 /* touch @F array to prevent spurious warnings 20020415 MJD */
4114 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4119 S_init_perllib(pTHX)
4123 const char *perl5lib = NULL;
4126 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4132 perl5lib = PerlEnv_getenv("PERL5LIB");
4134 * It isn't possible to delete an environment variable with
4135 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4136 * case we treat PERL5LIB as undefined if it has a zero-length value.
4138 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4139 if (perl5lib && *perl5lib != '\0')
4143 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4145 s = PerlEnv_getenv("PERLLIB");
4147 incpush_use_sep(s, 0, 0);
4150 /* Treat PERL5?LIB as a possible search list logical name -- the
4151 * "natural" VMS idiom for a Unix path string. We allow each
4152 * element to be a set of |-separated directories for compatibility.
4156 if (my_trnlnm("PERL5LIB",buf,0))
4158 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4159 } while (my_trnlnm("PERL5LIB",buf,++idx));
4161 while (my_trnlnm("PERLLIB",buf,idx++))
4162 incpush_use_sep(buf, 0, 0);
4167 #ifndef PERL_IS_MINIPERL
4168 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4169 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4171 /* Use the ~-expanded versions of APPLLIB (undocumented),
4172 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4175 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4176 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4180 /* sitearch is always relative to sitelib on Windows for
4181 * DLL-based path intuition to work correctly */
4182 # if !defined(WIN32)
4183 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4184 INCPUSH_CAN_RELOCATE);
4190 /* this picks up sitearch as well */
4191 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4193 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4195 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4199 #ifdef PERL_VENDORARCH_EXP
4200 /* vendorarch is always relative to vendorlib on Windows for
4201 * DLL-based path intuition to work correctly */
4202 # if !defined(WIN32)
4203 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4204 INCPUSH_CAN_RELOCATE);
4208 #ifdef PERL_VENDORLIB_EXP
4210 /* this picks up vendorarch as well */
4211 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4213 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4215 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4216 INCPUSH_CAN_RELOCATE);
4221 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4225 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4229 s = win32_get_privlib(PERL_FS_VERSION, &len);
4231 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4234 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4236 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4240 #ifdef PERL_OTHERLIBDIRS
4241 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4242 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4243 |INCPUSH_CAN_RELOCATE);
4249 * It isn't possible to delete an environment variable with
4250 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4251 * case we treat PERL5LIB as undefined if it has a zero-length value.
4253 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4254 if (perl5lib && *perl5lib != '\0')
4258 incpush_use_sep(perl5lib, 0,
4259 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4261 /* Treat PERL5?LIB as a possible search list logical name -- the
4262 * "natural" VMS idiom for a Unix path string. We allow each
4263 * element to be a set of |-separated directories for compatibility.
4267 if (my_trnlnm("PERL5LIB",buf,0))
4269 incpush_use_sep(buf, 0,
4270 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4271 } while (my_trnlnm("PERL5LIB",buf,++idx));
4275 /* Use the ~-expanded versions of APPLLIB (undocumented),
4276 SITELIB and VENDORLIB for older versions
4279 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4280 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4283 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4284 /* Search for version-specific dirs below here */
4285 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4286 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4290 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4291 /* Search for version-specific dirs below here */
4292 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4293 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4296 #ifdef PERL_OTHERLIBDIRS
4297 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4298 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4299 |INCPUSH_CAN_RELOCATE);
4301 #endif /* !PERL_IS_MINIPERL */
4304 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4307 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4308 # define PERLLIB_SEP ';'
4311 # define PERLLIB_SEP '|'
4313 # define PERLLIB_SEP ':'
4316 #ifndef PERLLIB_MANGLE
4317 # define PERLLIB_MANGLE(s,n) (s)
4320 /* Push a directory onto @INC if it exists.
4321 Generate a new SV if we do this, to save needing to copy the SV we push
4324 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4329 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4331 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4332 S_ISDIR(tmpstatbuf.st_mode)) {
4334 dir = newSVsv(stem);
4336 /* Truncate dir back to stem. */
4337 SvCUR_set(dir, SvCUR(stem));
4343 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4346 const U8 using_sub_dirs
4347 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4348 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4349 const U8 add_versioned_sub_dirs
4350 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4351 const U8 add_archonly_sub_dirs
4352 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4353 #ifdef PERL_INC_VERSION_LIST
4354 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4356 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4357 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4358 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4359 AV *const inc = GvAVn(PL_incgv);
4361 PERL_ARGS_ASSERT_INCPUSH;
4364 /* Could remove this vestigial extra block, if we don't mind a lot of
4365 re-indenting diff noise. */
4368 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4369 arranged to unshift #! line -I onto the front of @INC. However,
4370 -I can add version and architecture specific libraries, and they
4371 need to go first. The old code assumed that it was always
4372 pushing. Hence to make it work, need to push the architecture
4373 (etc) libraries onto a temporary array, then "unshift" that onto
4374 the front of @INC. */
4375 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4378 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4379 defined to so something (in os2/os2.c), but the code has been
4380 this way, ignoring any possible changed of length, since
4381 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4383 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4385 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4388 /* Do the if() outside the #ifdef to avoid warnings about an unused
4391 #ifdef PERL_RELOCATABLE_INC
4393 * Relocatable include entries are marked with a leading .../
4396 * 0: Remove that leading ".../"
4397 * 1: Remove trailing executable name (anything after the last '/')
4398 * from the perl path to give a perl prefix
4400 * While the @INC element starts "../" and the prefix ends with a real
4401 * directory (ie not . or ..) chop that real directory off the prefix
4402 * and the leading "../" from the @INC element. ie a logical "../"
4404 * Finally concatenate the prefix and the remainder of the @INC element
4405 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4406 * generates /usr/local/lib/perl5
4408 const char *libpath = SvPVX(libdir);
4409 STRLEN libpath_len = SvCUR(libdir);
4410 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4412 SV * const caret_X = get_sv("\030", 0);
4413 /* Going to use the SV just as a scratch buffer holding a C
4419 /* $^X is *the* source of taint if tainting is on, hence
4420 SvPOK() won't be true. */
4422 assert(SvPOKp(caret_X));
4423 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4425 /* Firstly take off the leading .../
4426 If all else fail we'll do the paths relative to the current
4428 sv_chop(libdir, libpath + 4);
4429 /* Don't use SvPV as we're intentionally bypassing taining,
4430 mortal copies that the mg_get of tainting creates, and
4431 corruption that seems to come via the save stack.
4432 I guess that the save stack isn't correctly set up yet. */
4433 libpath = SvPVX(libdir);
4434 libpath_len = SvCUR(libdir);
4436 /* This would work more efficiently with memrchr, but as it's
4437 only a GNU extension we'd need to probe for it and
4438 implement our own. Not hard, but maybe not worth it? */
4440 prefix = SvPVX(prefix_sv);
4441 lastslash = strrchr(prefix, '/');
4443 /* First time in with the *lastslash = '\0' we just wipe off
4444 the trailing /perl from (say) /usr/foo/bin/perl
4448 while ((*lastslash = '\0'), /* Do that, come what may. */
4449 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4450 && (lastslash = strrchr(prefix, '/')))) {
4451 if (lastslash[1] == '\0'
4452 || (lastslash[1] == '.'
4453 && (lastslash[2] == '/' /* ends "/." */
4454 || (lastslash[2] == '/'
4455 && lastslash[3] == '/' /* or "/.." */
4457 /* Prefix ends "/" or "/." or "/..", any of which
4458 are fishy, so don't do any more logical cleanup.
4462 /* Remove leading "../" from path */
4465 /* Next iteration round the loop removes the last
4466 directory name from prefix by writing a '\0' in
4467 the while clause. */
4469 /* prefix has been terminated with a '\0' to the correct
4470 length. libpath points somewhere into the libdir SV.
4471 We need to join the 2 with '/' and drop the result into
4473 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4474 SvREFCNT_dec(libdir);
4475 /* And this is the new libdir. */
4478 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4479 /* Need to taint reloccated paths if running set ID */
4480 SvTAINTED_on(libdir);
4483 SvREFCNT_dec(prefix_sv);
4488 * BEFORE pushing libdir onto @INC we may first push version- and
4489 * archname-specific sub-directories.
4491 if (using_sub_dirs) {
4493 #ifdef PERL_INC_VERSION_LIST
4494 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4495 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4496 const char * const *incver;
4503 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4505 while (unix[len-1] == '/') len--; /* Cosmetic */
4506 sv_usepvn(libdir,unix,len);
4509 PerlIO_printf(Perl_error_log,
4510 "Failed to unixify @INC element \"%s\"\n",
4514 subdir = newSVsv(libdir);
4516 if (add_versioned_sub_dirs) {
4517 /* .../version/archname if -d .../version/archname */
4518 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4519 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4521 /* .../version if -d .../version */
4522 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4523 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4526 #ifdef PERL_INC_VERSION_LIST
4528 for (incver = incverlist; *incver; incver++) {
4529 /* .../xxx if -d .../xxx */
4530 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4531 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4536 if (add_archonly_sub_dirs) {
4537 /* .../archname if -d .../archname */
4538 sv_catpvs(subdir, "/" ARCHNAME);
4539 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4543 assert (SvREFCNT(subdir) == 1);
4544 SvREFCNT_dec(subdir);
4547 /* finally add this lib directory at the end of @INC */
4549 U32 extra = av_len(av) + 1;
4550 av_unshift(inc, extra + push_basedir);
4552 av_store(inc, extra, libdir);
4554 /* av owns a reference, av_store() expects to be donated a
4555 reference, and av expects to be sane when it's cleared.
4556 If I wanted to be naughty and wrong, I could peek inside the
4557 implementation of av_clear(), realise that it uses
4558 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4559 and so directly steal from it (with a memcpy() to inc, and
4560 then memset() to NULL them out. But people copy code from the
4561 core expecting it to be best practise, so let's use the API.
4562 Although studious readers will note that I'm not checking any
4564 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4568 else if (push_basedir) {
4569 av_push(inc, libdir);
4572 if (!push_basedir) {
4573 assert (SvREFCNT(libdir) == 1);
4574 SvREFCNT_dec(libdir);
4580 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4584 /* This logic has been broken out from S_incpush(). It may be possible to
4587 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4594 /* Break at all separators */
4595 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4597 /* skip any consecutive separators */
4599 /* Uncomment the next line for PATH semantics */
4600 /* But you'll need to write tests */
4601 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4603 incpush(p, (STRLEN)(s - p), flags);
4608 incpush(p, (STRLEN)(end - p), flags);
4613 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4617 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4623 PERL_ARGS_ASSERT_CALL_LIST;
4625 while (av_len(paramList) >= 0) {
4626 cv = MUTABLE_CV(av_shift(paramList));
4628 if (paramList == PL_beginav) {
4629 /* save PL_beginav for compiler */
4630 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4632 else if (paramList == PL_checkav) {
4633 /* save PL_checkav for compiler */
4634 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4636 else if (paramList == PL_unitcheckav) {
4637 /* save PL_unitcheckav for compiler */
4638 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4649 PL_madskills |= 16384;
4654 PL_madskills &= ~16384;
4657 (void)SvPV_const(atsv, len);
4659 PL_curcop = &PL_compiling;
4660 CopLINE_set(PL_curcop, oldline);
4661 if (paramList == PL_beginav)
4662 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4664 Perl_sv_catpvf(aTHX_ atsv,
4665 "%s failed--call queue aborted",
4666 paramList == PL_checkav ? "CHECK"
4667 : paramList == PL_initav ? "INIT"
4668 : paramList == PL_unitcheckav ? "UNITCHECK"
4670 while (PL_scopestack_ix > oldscope)
4673 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4680 /* my_exit() was called */
4681 while (PL_scopestack_ix > oldscope)
4684 PL_curstash = PL_defstash;
4685 PL_curcop = &PL_compiling;
4686 CopLINE_set(PL_curcop, oldline);
4692 PL_curcop = &PL_compiling;
4693 CopLINE_set(PL_curcop, oldline);
4696 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4705 Perl_my_exit(pTHX_ U32 status)
4716 STATUS_EXIT_SET(status);
4723 Perl_my_failure_exit(pTHX)
4727 /* We have been called to fall on our sword. The desired exit code
4728 * should be already set in STATUS_UNIX, but could be shifted over
4729 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4732 * If an error code has not been set, then force the issue.
4734 if (MY_POSIX_EXIT) {
4736 /* According to the die_exit.t tests, if errno is non-zero */
4737 /* It should be used for the error status. */
4739 if (errno == EVMSERR) {
4740 STATUS_NATIVE = vaxc$errno;
4743 /* According to die_exit.t tests, if the child_exit code is */
4744 /* also zero, then we need to exit with a code of 255 */
4745 if ((errno != 0) && (errno < 256))
4746 STATUS_UNIX_EXIT_SET(errno);
4747 else if (STATUS_UNIX < 255) {
4748 STATUS_UNIX_EXIT_SET(255);
4753 /* The exit code could have been set by $? or vmsish which
4754 * means that it may not have fatal set. So convert
4755 * success/warning codes to fatal with out changing
4756 * the POSIX status code. The severity makes VMS native
4757 * status handling work, while UNIX mode programs use the
4758 * the POSIX exit codes.
4760 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4761 STATUS_NATIVE &= STS$M_COND_ID;
4762 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4766 /* Traditionally Perl on VMS always expects a Fatal Error. */
4767 if (vaxc$errno & 1) {
4769 /* So force success status to failure */
4770 if (STATUS_NATIVE & 1)
4775 STATUS_UNIX = EINTR; /* In case something cares */
4780 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4782 /* Encode the severity code */
4783 severity = STATUS_NATIVE & STS$M_SEVERITY;
4784 STATUS_UNIX = (severity ? severity : 1) << 8;
4786 /* Perl expects this to be a fatal error */
4787 if (severity != STS$K_SEVERE)
4796 STATUS_UNIX_SET(errno);
4798 exitstatus = STATUS_UNIX >> 8;
4799 if (exitstatus & 255)
4800 STATUS_UNIX_SET(exitstatus);
4802 STATUS_UNIX_SET(255);
4809 S_my_exit_jump(pTHX)
4814 SvREFCNT_dec(PL_e_script);
4818 POPSTACK_TO(PL_mainstack);
4826 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4829 const char * const p = SvPVX_const(PL_e_script);
4830 const char *nl = strchr(p, '\n');
4832 PERL_UNUSED_ARG(idx);
4833 PERL_UNUSED_ARG(maxlen);
4835 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4837 filter_del(read_e_script);
4840 sv_catpvn(buf_sv, p, nl-p);
4841 sv_chop(PL_e_script, nl);
4847 * c-indentation-style: bsd
4849 * indent-tabs-mode: t
4852 * ex: set ts=8 sts=4 sw=4 noet: