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_sawampersand = FALSE; /* must save all match strings */
870 Safefree(PL_inplace);
872 SvREFCNT_dec(PL_patchlevel);
873 SvREFCNT_dec(PL_apiversion);
876 SvREFCNT_dec(PL_e_script);
882 /* magical thingies */
884 SvREFCNT_dec(PL_ofsgv); /* *, */
887 SvREFCNT_dec(PL_ors_sv); /* $\ */
890 SvREFCNT_dec(PL_rs); /* $/ */
893 Safefree(PL_osname); /* $^O */
896 SvREFCNT_dec(PL_statname);
900 /* defgv, aka *_ should be taken care of elsewhere */
902 /* clean up after study() */
903 SvREFCNT_dec(PL_lastscream);
904 PL_lastscream = NULL;
905 Safefree(PL_screamfirst);
907 Safefree(PL_screamnext);
911 Safefree(PL_efloatbuf);
915 /* startup and shutdown function lists */
916 SvREFCNT_dec(PL_beginav);
917 SvREFCNT_dec(PL_beginav_save);
918 SvREFCNT_dec(PL_endav);
919 SvREFCNT_dec(PL_checkav);
920 SvREFCNT_dec(PL_checkav_save);
921 SvREFCNT_dec(PL_unitcheckav);
922 SvREFCNT_dec(PL_unitcheckav_save);
923 SvREFCNT_dec(PL_initav);
925 PL_beginav_save = NULL;
928 PL_checkav_save = NULL;
929 PL_unitcheckav = NULL;
930 PL_unitcheckav_save = NULL;
933 /* shortcuts just get cleared */
942 PL_last_in_gv = NULL;
954 SvREFCNT_dec(PL_argvout_stack);
955 PL_argvout_stack = NULL;
957 SvREFCNT_dec(PL_modglobal);
959 SvREFCNT_dec(PL_preambleav);
960 PL_preambleav = NULL;
961 SvREFCNT_dec(PL_subname);
963 #ifdef PERL_USES_PL_PIDSTATUS
964 SvREFCNT_dec(PL_pidstatus);
967 SvREFCNT_dec(PL_toptarget);
969 SvREFCNT_dec(PL_bodytarget);
970 PL_bodytarget = NULL;
971 PL_formtarget = NULL;
973 /* free locale stuff */
974 #ifdef USE_LOCALE_COLLATE
975 Safefree(PL_collation_name);
976 PL_collation_name = NULL;
979 #ifdef USE_LOCALE_NUMERIC
980 Safefree(PL_numeric_name);
981 PL_numeric_name = NULL;
982 SvREFCNT_dec(PL_numeric_radix_sv);
983 PL_numeric_radix_sv = NULL;
986 /* clear utf8 character classes */
987 SvREFCNT_dec(PL_utf8_alnum);
988 SvREFCNT_dec(PL_utf8_ascii);
989 SvREFCNT_dec(PL_utf8_alpha);
990 SvREFCNT_dec(PL_utf8_space);
991 SvREFCNT_dec(PL_utf8_cntrl);
992 SvREFCNT_dec(PL_utf8_graph);
993 SvREFCNT_dec(PL_utf8_digit);
994 SvREFCNT_dec(PL_utf8_upper);
995 SvREFCNT_dec(PL_utf8_lower);
996 SvREFCNT_dec(PL_utf8_print);
997 SvREFCNT_dec(PL_utf8_punct);
998 SvREFCNT_dec(PL_utf8_xdigit);
999 SvREFCNT_dec(PL_utf8_mark);
1000 SvREFCNT_dec(PL_utf8_toupper);
1001 SvREFCNT_dec(PL_utf8_totitle);
1002 SvREFCNT_dec(PL_utf8_tolower);
1003 SvREFCNT_dec(PL_utf8_tofold);
1004 SvREFCNT_dec(PL_utf8_idstart);
1005 SvREFCNT_dec(PL_utf8_idcont);
1006 SvREFCNT_dec(PL_utf8_foldclosures);
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;
1026 PL_utf8_foldclosures = NULL;
1028 if (!specialWARN(PL_compiling.cop_warnings))
1029 PerlMemShared_free(PL_compiling.cop_warnings);
1030 PL_compiling.cop_warnings = NULL;
1031 cophh_free(CopHINTHASH_get(&PL_compiling));
1032 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1033 CopFILE_free(&PL_compiling);
1034 CopSTASH_free(&PL_compiling);
1036 /* Prepare to destruct main symbol table. */
1039 /* break ref loop *:: <=> %:: */
1040 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1043 SvREFCNT_dec(PL_curstname);
1044 PL_curstname = NULL;
1046 /* clear queued errors */
1047 SvREFCNT_dec(PL_errors);
1050 SvREFCNT_dec(PL_isarev);
1053 if (destruct_level >= 2) {
1054 if (PL_scopestack_ix != 0)
1055 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1057 (long)PL_scopestack_ix);
1058 if (PL_savestack_ix != 0)
1059 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced saves: %ld more saves than restores\n",
1061 (long)PL_savestack_ix);
1062 if (PL_tmps_floor != -1)
1063 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1064 (long)PL_tmps_floor + 1);
1065 if (cxstack_ix != -1)
1066 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1067 (long)cxstack_ix + 1);
1070 #ifdef PERL_IMPLICIT_CONTEXT
1071 /* the entries in this list are allocated via SV PVX's, so get freed
1072 * in sv_clean_all */
1073 Safefree(PL_my_cxt_list);
1076 /* Now absolutely destruct everything, somehow or other, loops or no. */
1078 /* the 2 is for PL_fdpid and PL_strtab */
1079 while (sv_clean_all() > 2)
1082 AvREAL_off(PL_fdpid); /* no surviving entries */
1083 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1086 #ifdef HAVE_INTERP_INTERN
1090 /* Destruct the global string table. */
1092 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1093 * so that sv_free() won't fail on them.
1094 * Now that the global string table is using a single hunk of memory
1095 * for both HE and HEK, we either need to explicitly unshare it the
1096 * correct way, or actually free things here.
1099 const I32 max = HvMAX(PL_strtab);
1100 HE * const * const array = HvARRAY(PL_strtab);
1101 HE *hent = array[0];
1104 if (hent && ckWARN_d(WARN_INTERNAL)) {
1105 HE * const next = HeNEXT(hent);
1106 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1107 "Unbalanced string table refcount: (%ld) for \"%s\"",
1108 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1115 hent = array[riter];
1120 HvARRAY(PL_strtab) = 0;
1121 HvTOTALKEYS(PL_strtab) = 0;
1123 SvREFCNT_dec(PL_strtab);
1126 /* free the pointer tables used for cloning */
1127 ptr_table_free(PL_ptr_table);
1128 PL_ptr_table = (PTR_TBL_t*)NULL;
1131 /* free special SVs */
1133 SvREFCNT(&PL_sv_yes) = 0;
1134 sv_clear(&PL_sv_yes);
1135 SvANY(&PL_sv_yes) = NULL;
1136 SvFLAGS(&PL_sv_yes) = 0;
1138 SvREFCNT(&PL_sv_no) = 0;
1139 sv_clear(&PL_sv_no);
1140 SvANY(&PL_sv_no) = NULL;
1141 SvFLAGS(&PL_sv_no) = 0;
1145 for (i=0; i<=2; i++) {
1146 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1147 sv_clear(PERL_DEBUG_PAD(i));
1148 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1149 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1153 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1154 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1156 #ifdef DEBUG_LEAKING_SCALARS
1157 if (PL_sv_count != 0) {
1162 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1163 svend = &sva[SvREFCNT(sva)];
1164 for (sv = sva + 1; sv < svend; ++sv) {
1165 if (SvTYPE(sv) != SVTYPEMASK) {
1166 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1168 " refcnt=%"UVuf pTHX__FORMAT "\n"
1169 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1171 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1173 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1175 sv->sv_debug_inpad ? "for" : "by",
1176 sv->sv_debug_optype ?
1177 PL_op_name[sv->sv_debug_optype]: "(none)",
1178 PTR2UV(sv->sv_debug_parent),
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1182 Perl_dump_sv_child(aTHX_ sv);
1188 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1192 /* Wait for up to 4 seconds for child to terminate.
1193 This seems to be the least effort way of timing out on reaping
1195 struct timeval waitfor = {4, 0};
1196 int sock = PL_dumper_fd;
1200 FD_SET(sock, &rset);
1201 select(sock + 1, &rset, NULL, NULL, &waitfor);
1202 waitpid(child, &status, WNOHANG);
1207 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1213 #ifdef PERL_DEBUG_READONLY_OPS
1219 #if defined(PERLIO_LAYERS)
1220 /* No more IO - including error messages ! */
1221 PerlIO_cleanup(aTHX);
1224 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1225 as currently layers use it rather than NULL as a marker
1226 for no arg - and will try and SvREFCNT_dec it.
1228 SvREFCNT(&PL_sv_undef) = 0;
1229 SvREADONLY_off(&PL_sv_undef);
1231 Safefree(PL_origfilename);
1232 PL_origfilename = NULL;
1233 Safefree(PL_reg_start_tmp);
1234 PL_reg_start_tmp = (char**)NULL;
1235 PL_reg_start_tmpl = 0;
1236 Safefree(PL_reg_curpm);
1237 Safefree(PL_reg_poscache);
1238 free_tied_hv_pool();
1239 Safefree(PL_op_mask);
1240 Safefree(PL_psig_name);
1241 PL_psig_name = (SV**)NULL;
1242 PL_psig_ptr = (SV**)NULL;
1244 /* We need to NULL PL_psig_pend first, so that
1245 signal handlers know not to use it */
1246 int *psig_save = PL_psig_pend;
1247 PL_psig_pend = (int*)NULL;
1248 Safefree(psig_save);
1252 PL_tainting = FALSE;
1253 PL_taint_warn = FALSE;
1254 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1257 DEBUG_P(debprofdump());
1259 #ifdef USE_REENTRANT_API
1260 Perl_reentrant_free(aTHX);
1265 while (PL_regmatch_slab) {
1266 regmatch_slab *s = PL_regmatch_slab;
1267 PL_regmatch_slab = PL_regmatch_slab->next;
1271 /* As the absolutely last thing, free the non-arena SV for mess() */
1274 /* we know that type == SVt_PVMG */
1276 /* it could have accumulated taint magic */
1279 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1280 moremagic = mg->mg_moremagic;
1281 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1283 Safefree(mg->mg_ptr);
1287 /* we know that type >= SVt_PV */
1288 SvPV_free(PL_mess_sv);
1289 Safefree(SvANY(PL_mess_sv));
1290 Safefree(PL_mess_sv);
1297 =for apidoc perl_free
1299 Releases a Perl interpreter. See L<perlembed>.
1309 PERL_ARGS_ASSERT_PERL_FREE;
1311 if (PL_veto_cleanup)
1314 #ifdef PERL_TRACK_MEMPOOL
1317 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1318 * value as we're probably hunting memory leaks then
1320 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1321 if (!s || atoi(s) == 0) {
1322 const U32 old_debug = PL_debug;
1323 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1324 thread at thread exit. */
1326 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1327 "free this thread's memory\n");
1328 PL_debug &= ~ DEBUG_m_FLAG;
1330 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1331 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1332 PL_debug = old_debug;
1337 #if defined(WIN32) || defined(NETWARE)
1338 # if defined(PERL_IMPLICIT_SYS)
1341 void *host = nw_internal_host;
1343 void *host = w32_internal_host;
1345 PerlMem_free(aTHXx);
1347 nw_delete_internal_host(host);
1349 win32_delete_internal_host(host);
1353 PerlMem_free(aTHXx);
1356 PerlMem_free(aTHXx);
1360 #if defined(USE_ITHREADS)
1361 /* provide destructors to clean up the thread key when libperl is unloaded */
1362 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1364 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1365 #pragma fini "perl_fini"
1366 #elif defined(__sun) && !defined(__GNUC__)
1367 #pragma fini (perl_fini)
1371 #if defined(__GNUC__)
1372 __attribute__((destructor))
1377 if (PL_curinterp && !PL_veto_cleanup)
1382 #endif /* THREADS */
1385 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1388 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1389 PL_exitlist[PL_exitlistlen].fn = fn;
1390 PL_exitlist[PL_exitlistlen].ptr = ptr;
1394 #ifdef HAS_PROCSELFEXE
1395 /* This is a function so that we don't hold on to MAXPATHLEN
1396 bytes of stack longer than necessary
1399 S_procself_val(pTHX_ SV *sv, const char *arg0)
1401 char buf[MAXPATHLEN];
1402 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1404 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1405 includes a spurious NUL which will cause $^X to fail in system
1406 or backticks (this will prevent extensions from being built and
1407 many tests from working). readlink is not meant to add a NUL.
1408 Normal readlink works fine.
1410 if (len > 0 && buf[len-1] == '\0') {
1414 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1415 returning the text "unknown" from the readlink rather than the path
1416 to the executable (or returning an error from the readlink). Any valid
1417 path has a '/' in it somewhere, so use that to validate the result.
1418 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1420 if (len > 0 && memchr(buf, '/', len)) {
1421 sv_setpvn(sv,buf,len);
1427 #endif /* HAS_PROCSELFEXE */
1430 S_set_caret_X(pTHX) {
1432 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1434 #ifdef HAS_PROCSELFEXE
1435 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1438 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1440 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1447 =for apidoc perl_parse
1449 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1455 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1462 PERL_ARGS_ASSERT_PERL_PARSE;
1463 #ifndef MULTIPLICITY
1464 PERL_UNUSED_ARG(my_perl);
1467 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1468 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1469 * This MUST be done before any hash stores or fetches take place.
1470 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1471 * yourself, it is your responsibility to provide a good random seed!
1472 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1473 if (!PL_rehash_seed_set)
1474 PL_rehash_seed = get_hash_seed();
1476 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1478 if (s && (atoi(s) == 1))
1479 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1481 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1486 if (PL_origalen != 0) {
1487 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1490 /* Set PL_origalen be the sum of the contiguous argv[]
1491 * elements plus the size of the env in case that it is
1492 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1493 * as the maximum modifiable length of $0. In the worst case
1494 * the area we are able to modify is limited to the size of
1495 * the original argv[0]. (See below for 'contiguous', though.)
1497 const char *s = NULL;
1500 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1501 /* Do the mask check only if the args seem like aligned. */
1503 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1505 /* See if all the arguments are contiguous in memory. Note
1506 * that 'contiguous' is a loose term because some platforms
1507 * align the argv[] and the envp[]. If the arguments look
1508 * like non-aligned, assume that they are 'strictly' or
1509 * 'traditionally' contiguous. If the arguments look like
1510 * aligned, we just check that they are within aligned
1511 * PTRSIZE bytes. As long as no system has something bizarre
1512 * like the argv[] interleaved with some other data, we are
1513 * fine. (Did I just evoke Murphy's Law?) --jhi */
1514 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1516 for (i = 1; i < PL_origargc; i++) {
1517 if ((PL_origargv[i] == s + 1
1519 || PL_origargv[i] == s + 2
1524 (PL_origargv[i] > s &&
1526 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1537 #ifndef PERL_USE_SAFE_PUTENV
1538 /* Can we grab env area too to be used as the area for $0? */
1539 if (s && PL_origenviron && !PL_use_safe_putenv) {
1540 if ((PL_origenviron[0] == s + 1)
1543 (PL_origenviron[0] > s &&
1544 PL_origenviron[0] <=
1545 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1548 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1549 s = PL_origenviron[0];
1552 my_setenv("NoNe SuCh", NULL);
1553 /* Force copy of environment. */
1554 for (i = 1; PL_origenviron[i]; i++) {
1555 if (PL_origenviron[i] == s + 1
1558 (PL_origenviron[i] > s &&
1559 PL_origenviron[i] <=
1560 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1563 s = PL_origenviron[i];
1571 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1573 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1578 /* Come here if running an undumped a.out. */
1580 PL_origfilename = savepv(argv[0]);
1581 PL_do_undump = FALSE;
1582 cxstack_ix = -1; /* start label stack again */
1584 assert (!PL_tainted);
1586 S_set_caret_X(aTHX);
1588 init_postdump_symbols(argc,argv,env);
1593 op_free(PL_main_root);
1594 PL_main_root = NULL;
1596 PL_main_start = NULL;
1597 SvREFCNT_dec(PL_main_cv);
1601 oldscope = PL_scopestack_ix;
1602 PL_dowarn = G_WARN_OFF;
1607 parse_body(env,xsinit);
1609 call_list(oldscope, PL_unitcheckav);
1611 call_list(oldscope, PL_checkav);
1618 /* my_exit() was called */
1619 while (PL_scopestack_ix > oldscope)
1622 PL_curstash = PL_defstash;
1624 call_list(oldscope, PL_unitcheckav);
1626 call_list(oldscope, PL_checkav);
1630 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1638 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1639 miniperl, and we need to see those flags reflected in the values here. */
1641 /* What this returns is subject to change. Use the public interface in Config.
1644 S_Internals_V(pTHX_ CV *cv)
1647 #ifdef LOCAL_PATCH_COUNT
1648 const int local_patch_count = LOCAL_PATCH_COUNT;
1650 const int local_patch_count = 0;
1652 const int entries = 3 + local_patch_count;
1654 static char non_bincompat_options[] =
1661 # ifdef PERL_DISABLE_PMC
1664 # ifdef PERL_DONT_CREATE_GVSV
1665 " PERL_DONT_CREATE_GVSV"
1667 # ifdef PERL_EXTERNAL_GLOB
1668 " PERL_EXTERNAL_GLOB"
1670 # ifdef PERL_IS_MINIPERL
1673 # ifdef PERL_MALLOC_WRAP
1676 # ifdef PERL_MEM_LOG
1679 # ifdef PERL_MEM_LOG_NOIMPL
1680 " PERL_MEM_LOG_NOIMPL"
1682 # ifdef PERL_USE_DEVEL
1685 # ifdef PERL_USE_SAFE_PUTENV
1686 " PERL_USE_SAFE_PUTENV"
1688 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1689 " USE_ATTRIBUTES_FOR_PERLIO"
1691 # ifdef USE_FAST_STDIO
1694 # ifdef USE_PERL_ATOF
1697 # ifdef USE_SITECUSTOMIZE
1698 " USE_SITECUSTOMIZE"
1701 PERL_UNUSED_ARG(cv);
1702 PERL_UNUSED_ARG(items);
1704 EXTEND(SP, entries);
1706 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1707 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1708 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1712 PUSHs(Perl_newSVpvn_flags(aTHX_
1713 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1716 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1720 PUSHs(&PL_sv_undef);
1723 for (i = 1; i <= local_patch_count; i++) {
1724 /* This will be an undef, if PL_localpatches[i] is NULL. */
1725 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1731 #define INCPUSH_UNSHIFT 0x01
1732 #define INCPUSH_ADD_OLD_VERS 0x02
1733 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1734 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1735 #define INCPUSH_NOT_BASEDIR 0x10
1736 #define INCPUSH_CAN_RELOCATE 0x20
1737 #define INCPUSH_ADD_SUB_DIRS \
1738 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1741 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1745 int argc = PL_origargc;
1746 char **argv = PL_origargv;
1747 const char *scriptname = NULL;
1748 VOL bool dosearch = FALSE;
1750 bool doextract = FALSE;
1751 const char *cddir = NULL;
1752 #ifdef USE_SITECUSTOMIZE
1753 bool minus_f = FALSE;
1755 SV *linestr_sv = newSV_type(SVt_PVIV);
1756 bool add_read_e_script = FALSE;
1758 SvGROW(linestr_sv, 80);
1759 sv_setpvs(linestr_sv,"");
1765 for (argc--,argv++; argc > 0; argc--,argv++) {
1766 if (argv[0][0] != '-' || !argv[0][1])
1772 #ifndef PERL_STRICT_CR
1796 if ((s = moreswitches(s)))
1801 CHECK_MALLOC_TOO_LATE_FOR('t');
1802 if( !PL_tainting ) {
1803 PL_taint_warn = TRUE;
1809 CHECK_MALLOC_TOO_LATE_FOR('T');
1811 PL_taint_warn = FALSE;
1819 forbid_setid('e', FALSE);
1821 PL_e_script = newSVpvs("");
1822 add_read_e_script = TRUE;
1825 sv_catpv(PL_e_script, s);
1827 sv_catpv(PL_e_script, argv[1]);
1831 Perl_croak(aTHX_ "No code specified for -%c", c);
1832 sv_catpvs(PL_e_script, "\n");
1836 #ifdef USE_SITECUSTOMIZE
1842 case 'I': /* -I handled both here and in moreswitches() */
1843 forbid_setid('I', FALSE);
1844 if (!*++s && (s=argv[1]) != NULL) {
1848 STRLEN len = strlen(s);
1849 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1852 Perl_croak(aTHX_ "No directory specified for -I");
1855 forbid_setid('S', FALSE);
1864 opts_prog = newSVpvs("use Config; Config::_V()");
1868 opts_prog = Perl_newSVpvf(aTHX_
1869 "use Config; Config::config_vars(qw%c%s%c)",
1873 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1874 /* don't look for script or read stdin */
1875 scriptname = BIT_BUCKET;
1887 if (!*++s || isSPACE(*s)) {
1891 /* catch use of gnu style long options */
1892 if (strEQ(s, "version")) {
1896 if (strEQ(s, "help")) {
1903 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1914 #ifndef SECURE_INTERNAL_GETENV
1917 (s = PerlEnv_getenv("PERL5OPT")))
1921 if (*s == '-' && *(s+1) == 'T') {
1922 CHECK_MALLOC_TOO_LATE_FOR('T');
1924 PL_taint_warn = FALSE;
1927 char *popt_copy = NULL;
1940 if (!strchr("CDIMUdmtwW", *s))
1941 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1945 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1946 s = popt_copy + (s - d);
1954 if( !PL_tainting ) {
1955 PL_taint_warn = TRUE;
1966 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1968 /* SITELIB_EXP is a function call on Win32.
1969 The games with local $! are to avoid setting errno if there is no
1970 sitecustomize script. */
1971 const char *const sitelib = SITELIB_EXP;
1972 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1974 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1979 scriptname = argv[0];
1982 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1984 else if (scriptname == NULL) {
1986 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1992 /* Set $^X early so that it can be used for relocatable paths in @INC */
1993 assert (!PL_tainted);
1995 S_set_caret_X(aTHX);
2000 bool suidscript = FALSE;
2002 open_script(scriptname, dosearch, &suidscript, &rsfp);
2004 validate_suid(validarg, scriptname, fdscript, suidscript,
2008 # if defined(SIGCHLD) || defined(SIGCLD)
2011 # define SIGCHLD SIGCLD
2013 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2014 if (sigstate == (Sighandler_t) SIG_IGN) {
2015 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2016 "Can't ignore signal CHLD, forcing to default");
2017 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2025 /* This will croak if suidscript is true, as -x cannot be used with
2027 forbid_setid('x', suidscript);
2028 /* Hence you can't get here if suidscript is true */
2030 find_beginning(linestr_sv, rsfp);
2031 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2032 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2036 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2037 CvUNIQUE_on(PL_compcv);
2039 CvPADLIST(PL_compcv) = pad_new(0);
2041 PL_isarev = newHV();
2044 boot_core_UNIVERSAL();
2046 newXS("Internals::V", S_Internals_V, __FILE__);
2049 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2051 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2057 # ifdef HAS_SOCKS5_INIT
2058 socks5_init(argv[0]);
2064 init_predump_symbols();
2065 /* init_postdump_symbols not currently designed to be called */
2066 /* more than once (ENV isn't cleared first, for example) */
2067 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2069 init_postdump_symbols(argc,argv,env);
2071 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2072 * or explicitly in some platforms.
2073 * locale.c:Perl_init_i18nl10n() if the environment
2074 * look like the user wants to use UTF-8. */
2075 #if defined(__SYMBIAN32__)
2076 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2078 # ifndef PERL_IS_MINIPERL
2080 /* Requires init_predump_symbols(). */
2081 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2086 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2087 * and the default open disciplines. */
2088 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2089 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2091 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2092 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2093 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2095 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2096 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2097 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2099 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2100 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2101 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2103 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2104 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2107 sv_setpvs(sv, ":utf8\0:utf8");
2109 sv_setpvs(sv, ":utf8\0");
2112 sv_setpvs(sv, "\0:utf8");
2121 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2122 if (strEQ(s, "unsafe"))
2123 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2124 else if (strEQ(s, "safe"))
2125 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2127 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2134 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2138 PL_xmlfp = PerlIO_stdout();
2140 PL_xmlfp = PerlIO_open(s, "w");
2142 Perl_croak(aTHX_ "Can't open %s", s);
2144 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2150 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2151 PL_madskills = atoi(s);
2152 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2157 lex_start(linestr_sv, rsfp, 0);
2158 PL_subname = newSVpvs("main");
2160 if (add_read_e_script)
2161 filter_add(read_e_script, NULL);
2163 /* now parse the script */
2165 SETERRNO(0,SS_NORMAL);
2166 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2168 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2170 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2174 CopLINE_set(PL_curcop, 0);
2175 PL_curstash = PL_defstash;
2177 SvREFCNT_dec(PL_e_script);
2185 SAVECOPFILE(PL_curcop);
2186 SAVECOPLINE(PL_curcop);
2187 gv_check(PL_defstash);
2196 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2197 dump_mstats("after compilation:");
2202 PL_restartjmpenv = NULL;
2208 =for apidoc perl_run
2210 Tells a Perl interpreter to run. See L<perlembed>.
2223 PERL_ARGS_ASSERT_PERL_RUN;
2224 #ifndef MULTIPLICITY
2225 PERL_UNUSED_ARG(my_perl);
2228 oldscope = PL_scopestack_ix;
2236 cxstack_ix = -1; /* start context stack again */
2238 case 0: /* normal completion */
2242 case 2: /* my_exit() */
2243 while (PL_scopestack_ix > oldscope)
2246 PL_curstash = PL_defstash;
2247 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2248 PL_endav && !PL_minus_c)
2249 call_list(oldscope, PL_endav);
2251 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2252 dump_mstats("after execution: ");
2258 POPSTACK_TO(PL_mainstack);
2261 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2272 S_run_body(pTHX_ I32 oldscope)
2275 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2276 PL_sawampersand ? "Enabling" : "Omitting"));
2278 if (!PL_restartop) {
2282 exit(0); /* less likely to core dump than my_exit(0) */
2286 if (DEBUG_x_TEST || DEBUG_B_TEST)
2287 dump_all_perl(!DEBUG_B_TEST);
2289 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2293 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2296 if (PERLDB_SINGLE && PL_DBsingle)
2297 sv_setiv(PL_DBsingle, 1);
2299 call_list(oldscope, PL_initav);
2300 #ifdef PERL_DEBUG_READONLY_OPS
2301 Perl_pending_Slabs_to_ro(aTHX);
2308 PL_restartjmpenv = NULL;
2309 PL_op = PL_restartop;
2313 else if (PL_main_start) {
2314 CvDEPTH(PL_main_cv) = 1;
2315 PL_op = PL_main_start;
2323 =head1 SV Manipulation Functions
2325 =for apidoc p||get_sv
2327 Returns the SV of the specified Perl scalar. C<flags> are passed to
2328 C<gv_fetchpv>. If C<GV_ADD> is set and the
2329 Perl variable does not exist then it will be created. If C<flags> is zero
2330 and the variable does not exist then NULL is returned.
2336 Perl_get_sv(pTHX_ const char *name, I32 flags)
2340 PERL_ARGS_ASSERT_GET_SV;
2342 gv = gv_fetchpv(name, flags, SVt_PV);
2349 =head1 Array Manipulation Functions
2351 =for apidoc p||get_av
2353 Returns the AV of the specified Perl array. C<flags> are passed to
2354 C<gv_fetchpv>. If C<GV_ADD> is set and the
2355 Perl variable does not exist then it will be created. If C<flags> is zero
2356 and the variable does not exist then NULL is returned.
2362 Perl_get_av(pTHX_ const char *name, I32 flags)
2364 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2366 PERL_ARGS_ASSERT_GET_AV;
2376 =head1 Hash Manipulation Functions
2378 =for apidoc p||get_hv
2380 Returns the HV of the specified Perl hash. C<flags> are passed to
2381 C<gv_fetchpv>. If C<GV_ADD> is set and the
2382 Perl variable does not exist then it will be created. If C<flags> is zero
2383 and the variable does not exist then NULL is returned.
2389 Perl_get_hv(pTHX_ const char *name, I32 flags)
2391 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2393 PERL_ARGS_ASSERT_GET_HV;
2403 =head1 CV Manipulation Functions
2405 =for apidoc p||get_cvn_flags
2407 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2408 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2409 exist then it will be declared (which has the same effect as saying
2410 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2411 then NULL is returned.
2413 =for apidoc p||get_cv
2415 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2421 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2423 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2424 /* XXX this is probably not what they think they're getting.
2425 * It has the same effect as "sub name;", i.e. just a forward
2428 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2430 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2431 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2432 return newSUB(start_subparse(FALSE, 0),
2433 newSVOP(OP_CONST, 0, sv),
2441 /* Nothing in core calls this now, but we can't replace it with a macro and
2442 move it to mathoms.c as a macro would evaluate name twice. */
2444 Perl_get_cv(pTHX_ const char *name, I32 flags)
2446 PERL_ARGS_ASSERT_GET_CV;
2448 return get_cvn_flags(name, strlen(name), flags);
2451 /* Be sure to refetch the stack pointer after calling these routines. */
2455 =head1 Callback Functions
2457 =for apidoc p||call_argv
2459 Performs a callback to the specified Perl sub. See L<perlcall>.
2465 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2467 /* See G_* flags in cop.h */
2468 /* null terminated arg list */
2473 PERL_ARGS_ASSERT_CALL_ARGV;
2478 mXPUSHs(newSVpv(*argv,0));
2483 return call_pv(sub_name, flags);
2487 =for apidoc p||call_pv
2489 Performs a callback to the specified Perl sub. See L<perlcall>.
2495 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2496 /* name of the subroutine */
2497 /* See G_* flags in cop.h */
2499 PERL_ARGS_ASSERT_CALL_PV;
2501 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2505 =for apidoc p||call_method
2507 Performs a callback to the specified Perl method. The blessed object must
2508 be on the stack. See L<perlcall>.
2514 Perl_call_method(pTHX_ const char *methname, I32 flags)
2515 /* name of the subroutine */
2516 /* See G_* flags in cop.h */
2519 PERL_ARGS_ASSERT_CALL_METHOD;
2521 len = strlen(methname);
2523 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2524 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2527 /* May be called with any of a CV, a GV, or an SV containing the name. */
2529 =for apidoc p||call_sv
2531 Performs a callback to the Perl sub whose name is in the SV. See
2538 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2539 /* See G_* flags in cop.h */
2542 LOGOP myop; /* fake syntax tree node */
2547 bool oldcatch = CATCH_GET;
2549 OP* const oldop = PL_op;
2552 PERL_ARGS_ASSERT_CALL_SV;
2554 if (flags & G_DISCARD) {
2558 if (!(flags & G_WANT)) {
2559 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2564 Zero(&myop, 1, LOGOP);
2565 myop.op_next = NULL;
2566 if (!(flags & G_NOARGS))
2567 myop.op_flags |= OPf_STACKED;
2568 myop.op_flags |= OP_GIMME_REVERSE(flags);
2572 EXTEND(PL_stack_sp, 1);
2573 *++PL_stack_sp = sv;
2575 oldscope = PL_scopestack_ix;
2577 if (PERLDB_SUB && PL_curstash != PL_debstash
2578 /* Handle first BEGIN of -d. */
2579 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2580 /* Try harder, since this may have been a sighandler, thus
2581 * curstash may be meaningless. */
2582 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2583 && !(flags & G_NODEBUG))
2584 PL_op->op_private |= OPpENTERSUB_DB;
2586 if (flags & G_METHOD) {
2587 Zero(&method_op, 1, UNOP);
2588 method_op.op_next = PL_op;
2589 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2590 method_op.op_type = OP_METHOD;
2591 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2592 myop.op_type = OP_ENTERSUB;
2593 PL_op = (OP*)&method_op;
2596 if (!(flags & G_EVAL)) {
2598 CALL_BODY_SUB((OP*)&myop);
2599 retval = PL_stack_sp - (PL_stack_base + oldmark);
2600 CATCH_SET(oldcatch);
2603 myop.op_other = (OP*)&myop;
2605 create_eval_scope(flags|G_FAKINGEVAL);
2613 CALL_BODY_SUB((OP*)&myop);
2614 retval = PL_stack_sp - (PL_stack_base + oldmark);
2615 if (!(flags & G_KEEPERR)) {
2623 /* my_exit() was called */
2624 PL_curstash = PL_defstash;
2631 PL_restartjmpenv = NULL;
2632 PL_op = PL_restartop;
2636 PL_stack_sp = PL_stack_base + oldmark;
2637 if ((flags & G_WANT) == G_ARRAY)
2641 *++PL_stack_sp = &PL_sv_undef;
2646 if (PL_scopestack_ix > oldscope)
2647 delete_eval_scope();
2651 if (flags & G_DISCARD) {
2652 PL_stack_sp = PL_stack_base + oldmark;
2661 /* Eval a string. The G_EVAL flag is always assumed. */
2664 =for apidoc p||eval_sv
2666 Tells Perl to C<eval> the string in the SV. It supports the same flags
2667 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2673 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2675 /* See G_* flags in cop.h */
2679 UNOP myop; /* fake syntax tree node */
2680 VOL I32 oldmark = SP - PL_stack_base;
2683 OP* const oldop = PL_op;
2686 PERL_ARGS_ASSERT_EVAL_SV;
2688 if (flags & G_DISCARD) {
2695 Zero(PL_op, 1, UNOP);
2696 EXTEND(PL_stack_sp, 1);
2697 *++PL_stack_sp = sv;
2699 if (!(flags & G_NOARGS))
2700 myop.op_flags = OPf_STACKED;
2701 myop.op_next = NULL;
2702 myop.op_type = OP_ENTEREVAL;
2703 myop.op_flags |= OP_GIMME_REVERSE(flags);
2704 if (flags & G_KEEPERR)
2705 myop.op_flags |= OPf_SPECIAL;
2707 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2708 * before a PUSHEVAL, which corrupts the stack after a croak */
2709 TAINT_PROPER("eval_sv()");
2715 if (PL_op == (OP*)(&myop)) {
2716 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2718 goto fail; /* failed in compilation */
2721 retval = PL_stack_sp - (PL_stack_base + oldmark);
2722 if (!(flags & G_KEEPERR)) {
2730 /* my_exit() was called */
2731 PL_curstash = PL_defstash;
2738 PL_restartjmpenv = NULL;
2739 PL_op = PL_restartop;
2744 PL_stack_sp = PL_stack_base + oldmark;
2745 if ((flags & G_WANT) == G_ARRAY)
2749 *++PL_stack_sp = &PL_sv_undef;
2755 if (flags & G_DISCARD) {
2756 PL_stack_sp = PL_stack_base + oldmark;
2766 =for apidoc p||eval_pv
2768 Tells Perl to C<eval> the given string and return an SV* result.
2774 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2778 SV* sv = newSVpv(p, 0);
2780 PERL_ARGS_ASSERT_EVAL_PV;
2782 eval_sv(sv, G_SCALAR);
2789 if (croak_on_error && SvTRUE(ERRSV)) {
2790 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2796 /* Require a module. */
2799 =head1 Embedding Functions
2801 =for apidoc p||require_pv
2803 Tells Perl to C<require> the file named by the string argument. It is
2804 analogous to the Perl code C<eval "require '$file'">. It's even
2805 implemented that way; consider using load_module instead.
2810 Perl_require_pv(pTHX_ const char *pv)
2816 PERL_ARGS_ASSERT_REQUIRE_PV;
2818 PUSHSTACKi(PERLSI_REQUIRE);
2820 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2821 eval_sv(sv_2mortal(sv), G_DISCARD);
2827 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2829 /* This message really ought to be max 23 lines.
2830 * Removed -h because the user already knows that option. Others? */
2832 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2833 minimum of 509 character string literals. */
2834 static const char * const usage_msg[] = {
2835 " -0[octal] specify record separator (\\0, if no argument)\n"
2836 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2837 " -C[number/list] enables the listed Unicode features\n"
2838 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2839 " -d[:debugger] run program under debugger\n"
2840 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2841 " -e program one line of program (several -e's allowed, omit programfile)\n"
2842 " -E program like -e, but enables all optional features\n"
2843 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2844 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2845 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2846 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2847 " -l[octal] enable line ending processing, specifies line terminator\n"
2848 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2849 " -n assume \"while (<>) { ... }\" loop around program\n"
2850 " -p assume loop like -n but print line also, like sed\n"
2851 " -s enable rudimentary parsing for switches after programfile\n"
2852 " -S look for programfile using PATH environment variable\n",
2853 " -t enable tainting warnings\n"
2854 " -T enable tainting checks\n"
2855 " -u dump core after parsing program\n"
2856 " -U allow unsafe operations\n"
2857 " -v print version, patchlevel and license\n"
2858 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2859 " -w enable many useful warnings\n"
2860 " -W enable all warnings\n"
2861 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2862 " -X disable all warnings\n"
2864 "Run 'perldoc perl' for more help with Perl.\n\n",
2867 const char * const *p = usage_msg;
2868 PerlIO *out = PerlIO_stdout();
2870 PERL_ARGS_ASSERT_USAGE;
2873 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2876 PerlIO_puts(out, *p++);
2879 /* convert a string of -D options (or digits) into an int.
2880 * sets *s to point to the char after the options */
2884 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2886 static const char * const usage_msgd[] = {
2887 " Debugging flag values: (see also -d)\n"
2888 " p Tokenizing and parsing (with v, displays parse stack)\n"
2889 " s Stack snapshots (with v, displays all stacks)\n"
2890 " l Context (loop) stack processing\n"
2891 " t Trace execution\n"
2892 " o Method and overloading resolution\n",
2893 " c String/numeric conversions\n"
2894 " P Print profiling info, source file input state\n"
2895 " m Memory and SV allocation\n"
2896 " f Format processing\n"
2897 " r Regular expression parsing and execution\n"
2898 " x Syntax tree dump\n",
2899 " u Tainting checks\n"
2900 " H Hash dump -- usurps values()\n"
2901 " X Scratchpad allocation\n"
2904 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2905 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2906 " v Verbose: use in conjunction with other flags\n"
2907 " C Copy On Write\n"
2908 " A Consistency checks on internal structures\n"
2909 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2910 " M trace smart match resolution\n"
2911 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2916 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2919 /* if adding extra options, remember to update DEBUG_MASK */
2920 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2922 for (; isALNUM(**s); (*s)++) {
2923 const char * const d = strchr(debopts,**s);
2925 i |= 1 << (d - debopts);
2926 else if (ckWARN_d(WARN_DEBUGGING))
2927 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2928 "invalid option -D%c, use -D'' to see choices\n", **s);
2931 else if (isDIGIT(**s)) {
2933 for (; isALNUM(**s); (*s)++) ;
2935 else if (givehelp) {
2936 const char *const *p = usage_msgd;
2937 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2940 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2941 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2942 "-Dp not implemented on this platform\n");
2948 /* This routine handles any switches that can be given during run */
2951 Perl_moreswitches(pTHX_ const char *s)
2955 const char option = *s; /* used to remember option in -m/-M code */
2957 PERL_ARGS_ASSERT_MORESWITCHES;
2965 SvREFCNT_dec(PL_rs);
2966 if (s[1] == 'x' && s[2]) {
2967 const char *e = s+=2;
2973 flags = PERL_SCAN_SILENT_ILLDIGIT;
2974 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2975 if (s + numlen < e) {
2976 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2980 PL_rs = newSVpvs("");
2981 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2982 tmps = (U8*)SvPVX(PL_rs);
2983 uvchr_to_utf8(tmps, rschar);
2984 SvCUR_set(PL_rs, UNISKIP(rschar));
2989 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2990 if (rschar & ~((U8)~0))
2991 PL_rs = &PL_sv_undef;
2992 else if (!rschar && numlen >= 2)
2993 PL_rs = newSVpvs("");
2995 char ch = (char)rschar;
2996 PL_rs = newSVpvn(&ch, 1);
2999 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3004 PL_unicode = parse_unicode_opts( (const char **)&s );
3005 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3011 while (*s && !isSPACE(*s)) ++s;
3012 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3023 forbid_setid('d', FALSE);
3026 /* -dt indicates to the debugger that threads will be used */
3027 if (*s == 't' && !isALNUM(s[1])) {
3029 my_setenv("PERL5DB_THREADED", "1");
3032 /* The following permits -d:Mod to accepts arguments following an =
3033 in the fashion that -MSome::Mod does. */
3034 if (*s == ':' || *s == '=') {
3035 const char *start = ++s;
3036 const char *const end = s + strlen(s);
3037 SV * const sv = newSVpvs("use Devel::");
3039 /* We now allow -d:Module=Foo,Bar */
3040 while(isALNUM(*s) || *s==':') ++s;
3042 sv_catpvn(sv, start, end - start);
3044 sv_catpvn(sv, start, s-start);
3045 /* Don't use NUL as q// delimiter here, this string goes in the
3047 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3050 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3054 PL_perldb = PERLDB_ALL;
3061 forbid_setid('D', FALSE);
3063 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3064 #else /* !DEBUGGING */
3065 if (ckWARN_d(WARN_DEBUGGING))
3066 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3067 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3068 for (s++; isALNUM(*s); s++) ;
3073 usage(PL_origargv[0]);
3076 Safefree(PL_inplace);
3077 #if defined(__CYGWIN__) /* do backup extension automagically */
3078 if (*(s+1) == '\0') {
3079 PL_inplace = savepvs(".bak");
3082 #endif /* __CYGWIN__ */
3084 const char * const start = ++s;
3085 while (*s && !isSPACE(*s))
3088 PL_inplace = savepvn(start, s - start);
3092 if (*s == '-') /* Additional switches on #! line. */
3096 case 'I': /* -I handled both here and in parse_body() */
3097 forbid_setid('I', FALSE);
3099 while (*s && isSPACE(*s))
3104 /* ignore trailing spaces (possibly followed by other switches) */
3106 for (e = p; *e && !isSPACE(*e); e++) ;
3110 } while (*p && *p != '-');
3112 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3118 Perl_croak(aTHX_ "No directory specified for -I");
3124 SvREFCNT_dec(PL_ors_sv);
3130 PL_ors_sv = newSVpvs("\n");
3131 numlen = 3 + (*s == '0');
3132 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3136 if (RsPARA(PL_rs)) {
3137 PL_ors_sv = newSVpvs("\n\n");
3140 PL_ors_sv = newSVsv(PL_rs);
3145 forbid_setid('M', FALSE); /* XXX ? */
3148 forbid_setid('m', FALSE); /* XXX ? */
3153 const char *use = "use ";
3155 /* -M-foo == 'no foo' */
3156 /* Leading space on " no " is deliberate, to make both
3157 possibilities the same length. */
3158 if (*s == '-') { use = " no "; ++s; }
3159 sv = newSVpvn(use,4);
3161 /* We allow -M'Module qw(Foo Bar)' */
3162 while(isALNUM(*s) || *s==':') {
3171 Perl_croak(aTHX_ "Module name required with -%c option",
3174 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3175 "contains single ':'",
3176 (int)(s - start), start, option);
3177 end = s + strlen(s);
3179 sv_catpvn(sv, start, end - start);
3180 if (option == 'm') {
3182 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3183 sv_catpvs( sv, " ()");
3186 sv_catpvn(sv, start, s-start);
3187 /* Use NUL as q''-delimiter. */
3188 sv_catpvs(sv, " split(/,/,q\0");
3190 sv_catpvn(sv, s, end - s);
3191 sv_catpvs(sv, "\0)");
3194 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3197 Perl_croak(aTHX_ "Missing argument to -%c", option);
3208 forbid_setid('s', FALSE);
3209 PL_doswitches = TRUE;
3223 PL_do_undump = TRUE;
3231 if (!sv_derived_from(PL_patchlevel, "version"))
3232 upg_version(PL_patchlevel, TRUE);
3235 SV* level= vstringify(PL_patchlevel);
3236 #ifdef PERL_PATCHNUM
3237 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3238 SV *num = newSVpvs(PERL_PATCHNUM "*");
3240 SV *num = newSVpvs(PERL_PATCHNUM);
3243 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3244 SvREFCNT_dec(level);
3247 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\nThis is perl " STRINGIFY(PERL_REVISION)
3253 ", version " STRINGIFY(PERL_VERSION)
3254 ", subversion " STRINGIFY(PERL_SUBVERSION)
3255 " (%"SVf") built for " ARCHNAME, level
3257 SvREFCNT_dec(level);
3260 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3261 PerlIO_printf(PerlIO_stdout(),
3262 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3263 SVfARG(vstringify(PL_patchlevel))));
3264 PerlIO_printf(PerlIO_stdout(),
3265 Perl_form(aTHX_ " built under %s at %s %s\n",
3266 OSNAME, __DATE__, __TIME__));
3267 PerlIO_printf(PerlIO_stdout(),
3268 Perl_form(aTHX_ " OS Specific Release: %s\n",
3271 #if defined(LOCAL_PATCH_COUNT)
3272 if (LOCAL_PATCH_COUNT > 0)
3273 PerlIO_printf(PerlIO_stdout(),
3274 "\n(with %d registered patch%s, "
3275 "see perl -V for more detail)",
3277 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "\n\nCopyright 1987-2010, Larry Wall\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3289 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3294 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "atariST series port, ++jrb bammi@cadence.com\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3325 PerlIO_printf(PerlIO_stdout(),
3326 "EPOC port by Olaf Flebbe, 1999-2002\n");
3329 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3330 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3333 #ifdef __SYMBIAN32__
3334 PerlIO_printf(PerlIO_stdout(),
3335 "Symbian port by Nokia, 2004-2005\n");
3337 #ifdef BINARY_BUILD_NOTICE
3338 BINARY_BUILD_NOTICE;
3340 PerlIO_printf(PerlIO_stdout(),
3342 Perl may be copied only under the terms of either the Artistic License or the\n\
3343 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3344 Complete documentation for Perl, including FAQ lists, should be found on\n\
3345 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3346 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3349 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3350 PL_dowarn |= G_WARN_ON;
3355 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3356 if (!specialWARN(PL_compiling.cop_warnings))
3357 PerlMemShared_free(PL_compiling.cop_warnings);
3358 PL_compiling.cop_warnings = pWARN_ALL ;
3362 PL_dowarn = G_WARN_ALL_OFF;
3363 if (!specialWARN(PL_compiling.cop_warnings))
3364 PerlMemShared_free(PL_compiling.cop_warnings);
3365 PL_compiling.cop_warnings = pWARN_NONE ;
3372 if (s[0] == '-') /* Additional switches on #! line. */
3377 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3383 #ifdef ALTERNATE_SHEBANG
3384 case 'S': /* OS/2 needs -S on "extproc" line. */
3388 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3393 /* compliments of Tom Christiansen */
3395 /* unexec() can be found in the Gnu emacs distribution */
3396 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3399 Perl_my_unexec(pTHX)
3401 PERL_UNUSED_CONTEXT;
3403 SV * prog = newSVpv(BIN_EXP, 0);
3404 SV * file = newSVpv(PL_origfilename, 0);
3408 sv_catpvs(prog, "/perl");
3409 sv_catpvs(file, ".perldump");
3411 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3412 /* unexec prints msg to stderr in case of failure */
3413 PerlProc_exit(status);
3416 # include <lib$routines.h>
3417 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3418 # elif defined(WIN32) || defined(__CYGWIN__)
3419 Perl_croak(aTHX_ "dump is not supported");
3421 ABORT(); /* for use with undump */
3426 /* initialize curinterp */
3432 # define PERLVAR(var,type)
3433 # define PERLVARA(var,n,type)
3434 # if defined(PERL_IMPLICIT_CONTEXT)
3435 # define PERLVARI(var,type,init) aTHX->var = init;
3436 # define PERLVARIC(var,type,init) aTHX->var = init;
3438 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3439 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3441 # include "intrpvar.h"
3447 # define PERLVAR(var,type)
3448 # define PERLVARA(var,n,type)
3449 # define PERLVARI(var,type,init) PL_##var = init;
3450 # define PERLVARIC(var,type,init) PL_##var = init;
3451 # include "intrpvar.h"
3458 /* As these are inside a structure, PERLVARI isn't capable of initialising
3460 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3461 PL_reg_poscache = PL_reg_starttry = NULL;
3465 S_init_main_stash(pTHX)
3470 PL_curstash = PL_defstash = newHV();
3471 /* We know that the string "main" will be in the global shared string
3472 table, so it's a small saving to use it rather than allocate another
3474 PL_curstname = newSVpvs_share("main");
3475 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3476 /* If we hadn't caused another reference to "main" to be in the shared
3477 string table above, then it would be worth reordering these two,
3478 because otherwise all we do is delete "main" from it as a consequence
3479 of the SvREFCNT_dec, only to add it again with hv_name_set */
3480 SvREFCNT_dec(GvHV(gv));
3481 hv_name_set(PL_defstash, "main", 4, 0);
3482 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3484 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3486 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3487 GvMULTI_on(PL_incgv);
3488 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3489 GvMULTI_on(PL_hintgv);
3490 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3491 SvREFCNT_inc_simple_void(PL_defgv);
3492 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3493 SvREFCNT_inc_simple_void(PL_errgv);
3494 GvMULTI_on(PL_errgv);
3495 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3496 GvMULTI_on(PL_replgv);
3497 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3498 #ifdef PERL_DONT_CREATE_GVSV
3501 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3503 PL_curstash = PL_defstash;
3504 CopSTASH_set(&PL_compiling, PL_defstash);
3505 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3506 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3508 /* We must init $/ before switches are processed. */
3509 sv_setpvs(get_sv("/", GV_ADD), "\n");
3513 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3514 bool *suidscript, PerlIO **rsfpp)
3519 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3522 PL_origfilename = savepvs("-e");
3525 /* if find_script() returns, it returns a malloc()-ed value */
3526 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3528 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3529 const char *s = scriptname + 8;
3535 * Tell apart "normal" usage of fdscript, e.g.
3536 * with bash on FreeBSD:
3537 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3538 * from usage in suidperl.
3539 * Does any "normal" usage leave garbage after the number???
3540 * Is it a mistake to use a similar /dev/fd/ construct for
3545 * Be supersafe and do some sanity-checks.
3546 * Still, can we be sure we got the right thing?
3549 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3552 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3554 scriptname = savepv(s + 1);
3555 Safefree(PL_origfilename);
3556 PL_origfilename = (char *)scriptname;
3561 CopFILE_free(PL_curcop);
3562 CopFILE_set(PL_curcop, PL_origfilename);
3563 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3564 scriptname = (char *)"";
3565 if (fdscript >= 0) {
3566 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3567 # if defined(HAS_FCNTL) && defined(F_SETFD)
3569 /* ensure close-on-exec */
3570 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3573 else if (!*scriptname) {
3574 forbid_setid(0, *suidscript);
3575 *rsfpp = PerlIO_stdin();
3578 #ifdef FAKE_BIT_BUCKET
3579 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3580 * is called) and still have the "-e" work. (Believe it or not,
3581 * a /dev/null is required for the "-e" to work because source
3582 * filter magic is used to implement it. ) This is *not* a general
3583 * replacement for a /dev/null. What we do here is create a temp
3584 * file (an empty file), open up that as the script, and then
3585 * immediately close and unlink it. Close enough for jazz. */
3586 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3587 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3588 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3589 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3590 FAKE_BIT_BUCKET_TEMPLATE
3592 const char * const err = "Failed to create a fake bit bucket";
3593 if (strEQ(scriptname, BIT_BUCKET)) {
3594 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3595 int tmpfd = mkstemp(tmpname);
3597 scriptname = tmpname;
3600 Perl_croak(aTHX_ err);
3603 scriptname = mktemp(tmpname);
3605 Perl_croak(aTHX_ err);
3610 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3611 #ifdef FAKE_BIT_BUCKET
3612 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3613 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3614 && strlen(scriptname) == sizeof(tmpname) - 1) {
3617 scriptname = BIT_BUCKET;
3619 # if defined(HAS_FCNTL) && defined(F_SETFD)
3621 /* ensure close-on-exec */
3622 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3626 /* PSz 16 Sep 03 Keep neat error message */
3628 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3630 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3631 CopFILE(PL_curcop), Strerror(errno));
3637 * I_SYSSTATVFS HAS_FSTATVFS
3639 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3640 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3641 * here so that metaconfig picks them up. */
3644 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3645 /* Don't even need this function. */
3648 S_validate_suid(pTHX_ PerlIO *rsfp)
3650 PERL_ARGS_ASSERT_VALIDATE_SUID;
3652 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3655 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3656 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3658 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3661 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3662 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3663 /* not set-id, must be wrapped */
3666 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3669 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3673 register const char *s2;
3675 PERL_ARGS_ASSERT_FIND_BEGINNING;
3677 /* skip forward in input to the real script? */
3680 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3681 Perl_croak(aTHX_ "No Perl script found in input\n");
3683 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3684 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3685 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3687 while (*s == ' ' || *s == '\t') s++;
3689 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3690 || s2[-1] == '_') s2--;
3691 if (strnEQ(s2-4,"perl",4))
3692 while ((s = moreswitches(s)))
3702 PL_uid = PerlProc_getuid();
3703 PL_euid = PerlProc_geteuid();
3704 PL_gid = PerlProc_getgid();
3705 PL_egid = PerlProc_getegid();
3707 PL_uid |= PL_gid << 16;
3708 PL_euid |= PL_egid << 16;
3710 /* Should not happen: */
3711 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3712 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3715 * Should go by suidscript, not uid!=euid: why disallow
3716 * system("ls") in scripts run from setuid things?
3717 * Or, is this run before we check arguments and set suidscript?
3718 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3719 * (We never have suidscript, can we be sure to have fdscript?)
3720 * Or must then go by UID checks? See comments in forbid_setid also.
3724 /* This is used very early in the lifetime of the program,
3725 * before even the options are parsed, so PL_tainting has
3726 * not been initialized properly. */
3728 Perl_doing_taint(int argc, char *argv[], char *envp[])
3730 #ifndef PERL_IMPLICIT_SYS
3731 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3732 * before we have an interpreter-- and the whole point of this
3733 * function is to be called at such an early stage. If you are on
3734 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3735 * "tainted because running with altered effective ids', you'll
3736 * have to add your own checks somewhere in here. The two most
3737 * known samples of 'implicitness' are Win32 and NetWare, neither
3738 * of which has much of concept of 'uids'. */
3739 int uid = PerlProc_getuid();
3740 int euid = PerlProc_geteuid();
3741 int gid = PerlProc_getgid();
3742 int egid = PerlProc_getegid();
3749 if (uid && (euid != uid || egid != gid))
3751 #endif /* !PERL_IMPLICIT_SYS */
3752 /* This is a really primitive check; environment gets ignored only
3753 * if -T are the first chars together; otherwise one gets
3754 * "Too late" message. */
3755 if ( argc > 1 && argv[1][0] == '-'
3756 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3761 /* Passing the flag as a single char rather than a string is a slight space
3762 optimisation. The only message that isn't /^-.$/ is
3763 "program input from stdin", which is substituted in place of '\0', which
3764 could never be a command line flag. */
3766 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3769 char string[3] = "-x";
3770 const char *message = "program input from stdin";
3777 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3778 if (PL_euid != PL_uid)
3779 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3780 if (PL_egid != PL_gid)
3781 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3782 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3784 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3788 Perl_init_dbargs(pTHX)
3790 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3795 /* Someone has already created it.
3796 It might have entries, and if we just turn off AvREAL(), they will
3797 "leak" until global destruction. */
3800 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3804 Perl_init_debugger(pTHX)
3807 HV * const ostash = PL_curstash;
3809 PL_curstash = PL_debstash;
3811 Perl_init_dbargs(aTHX);
3812 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3813 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3814 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3815 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3816 if (!SvIOK(PL_DBsingle))
3817 sv_setiv(PL_DBsingle, 0);
3818 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3819 if (!SvIOK(PL_DBtrace))
3820 sv_setiv(PL_DBtrace, 0);
3821 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3822 if (!SvIOK(PL_DBsignal))
3823 sv_setiv(PL_DBsignal, 0);
3824 PL_curstash = ostash;
3827 #ifndef STRESS_REALLOC
3828 #define REASONABLE(size) (size)
3830 #define REASONABLE(size) (1) /* unreasonable */
3834 Perl_init_stacks(pTHX)
3837 /* start with 128-item stack and 8K cxstack */
3838 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3839 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3840 PL_curstackinfo->si_type = PERLSI_MAIN;
3841 PL_curstack = PL_curstackinfo->si_stack;
3842 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3844 PL_stack_base = AvARRAY(PL_curstack);
3845 PL_stack_sp = PL_stack_base;
3846 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3848 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3851 PL_tmps_max = REASONABLE(128);
3853 Newx(PL_markstack,REASONABLE(32),I32);
3854 PL_markstack_ptr = PL_markstack;
3855 PL_markstack_max = PL_markstack + REASONABLE(32);
3859 Newx(PL_scopestack,REASONABLE(32),I32);
3861 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3863 PL_scopestack_ix = 0;
3864 PL_scopestack_max = REASONABLE(32);
3866 Newx(PL_savestack,REASONABLE(128),ANY);
3867 PL_savestack_ix = 0;
3868 PL_savestack_max = REASONABLE(128);
3877 while (PL_curstackinfo->si_next)
3878 PL_curstackinfo = PL_curstackinfo->si_next;
3879 while (PL_curstackinfo) {
3880 PERL_SI *p = PL_curstackinfo->si_prev;
3881 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3882 Safefree(PL_curstackinfo->si_cxstack);
3883 Safefree(PL_curstackinfo);
3884 PL_curstackinfo = p;
3886 Safefree(PL_tmps_stack);
3887 Safefree(PL_markstack);
3888 Safefree(PL_scopestack);
3890 Safefree(PL_scopestack_name);
3892 Safefree(PL_savestack);
3896 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
3898 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
3899 AV *const isa = GvAVn(gv);
3902 PERL_ARGS_ASSERT_POPULATE_ISA;
3904 if(AvFILLp(isa) != -1)
3907 /* NOTE: No support for tied ISA */
3909 va_start(args, len);
3911 const char *const parent = va_arg(args, const char*);
3916 parent_len = va_arg(args, size_t);
3918 /* Arguments are supplied with a trailing :: */
3919 assert(parent_len > 2);
3920 assert(parent[parent_len - 1] == ':');
3921 assert(parent[parent_len - 2] == ':');
3922 av_push(isa, newSVpvn(parent, parent_len - 2));
3923 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
3930 S_init_predump_symbols(pTHX)
3936 sv_setpvs(get_sv("\"", GV_ADD), " ");
3937 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3940 /* Historically, PVIOs were blessed into IO::Handle, unless
3941 FileHandle was loaded, in which case they were blessed into
3942 that. Action at a distance.
3943 However, if we simply bless into IO::Handle, we break code
3944 that assumes that PVIOs will have (among others) a seek
3945 method. IO::File inherits from IO::Handle and IO::Seekable,
3946 and provides the needed methods. But if we simply bless into
3947 it, then we break code that assumed that by loading
3948 IO::Handle, *it* would work.
3949 So a compromise is to set up the correct @IO::File::ISA,
3950 so that code that does C<use IO::Handle>; will still work.
3953 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
3954 STR_WITH_LEN("IO::Handle::"),
3955 STR_WITH_LEN("IO::Seekable::"),
3956 STR_WITH_LEN("Exporter::"),
3959 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3960 GvMULTI_on(PL_stdingv);
3961 io = GvIOp(PL_stdingv);
3962 IoTYPE(io) = IoTYPE_RDONLY;
3963 IoIFP(io) = PerlIO_stdin();
3964 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3966 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3968 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3971 IoTYPE(io) = IoTYPE_WRONLY;
3972 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3974 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3976 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3978 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3979 GvMULTI_on(PL_stderrgv);
3980 io = GvIOp(PL_stderrgv);
3981 IoTYPE(io) = IoTYPE_WRONLY;
3982 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3983 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3985 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3987 PL_statname = newSV(0); /* last filename we did stat on */
3991 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3995 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3997 argc--,argv++; /* skip name of script */
3998 if (PL_doswitches) {
3999 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4003 if (argv[0][1] == '-' && !argv[0][2]) {
4007 if ((s = strchr(argv[0], '='))) {
4008 const char *const start_name = argv[0] + 1;
4009 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4010 TRUE, SVt_PV)), s + 1);
4013 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4016 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4017 GvMULTI_on(PL_argvgv);
4018 (void)gv_AVadd(PL_argvgv);
4019 av_clear(GvAVn(PL_argvgv));
4020 for (; argc > 0; argc--,argv++) {
4021 SV * const sv = newSVpv(argv[0],0);
4022 av_push(GvAVn(PL_argvgv),sv);
4023 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4024 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4027 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4028 (void)sv_utf8_decode(sv);
4034 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4039 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4041 PL_toptarget = newSV_type(SVt_PVFM);
4042 sv_setpvs(PL_toptarget, "");
4043 PL_bodytarget = newSV_type(SVt_PVFM);
4044 sv_setpvs(PL_bodytarget, "");
4045 PL_formtarget = PL_bodytarget;
4049 init_argv_symbols(argc,argv);
4051 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4052 sv_setpv(GvSV(tmpgv),PL_origfilename);
4054 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4056 bool env_is_not_environ;
4057 GvMULTI_on(PL_envgv);
4058 hv = GvHVn(PL_envgv);
4059 hv_magic(hv, NULL, PERL_MAGIC_env);
4061 #ifdef USE_ENVIRON_ARRAY
4062 /* Note that if the supplied env parameter is actually a copy
4063 of the global environ then it may now point to free'd memory
4064 if the environment has been modified since. To avoid this
4065 problem we treat env==NULL as meaning 'use the default'
4069 env_is_not_environ = env != environ;
4070 if (env_is_not_environ
4071 # ifdef USE_ITHREADS
4072 && PL_curinterp == aTHX
4081 for (; *env; env++) {
4084 if (!(s = strchr(old_var,'=')) || s == old_var)
4087 #if defined(MSDOS) && !defined(DJGPP)
4089 (void)strupr(old_var);
4092 sv = newSVpv(s+1, 0);
4093 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4094 if (env_is_not_environ)
4098 #endif /* USE_ENVIRON_ARRAY */
4099 #endif /* !PERL_MICRO */
4102 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4103 SvREADONLY_off(GvSV(tmpgv));
4104 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4105 SvREADONLY_on(GvSV(tmpgv));
4107 #ifdef THREADS_HAVE_PIDS
4108 PL_ppid = (IV)getppid();
4111 /* touch @F array to prevent spurious warnings 20020415 MJD */
4113 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4118 S_init_perllib(pTHX)
4122 const char *perl5lib = NULL;
4125 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4131 perl5lib = PerlEnv_getenv("PERL5LIB");
4133 * It isn't possible to delete an environment variable with
4134 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4135 * case we treat PERL5LIB as undefined if it has a zero-length value.
4137 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4138 if (perl5lib && *perl5lib != '\0')
4142 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4144 s = PerlEnv_getenv("PERLLIB");
4146 incpush_use_sep(s, 0, 0);
4149 /* Treat PERL5?LIB as a possible search list logical name -- the
4150 * "natural" VMS idiom for a Unix path string. We allow each
4151 * element to be a set of |-separated directories for compatibility.
4155 if (my_trnlnm("PERL5LIB",buf,0))
4157 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4158 } while (my_trnlnm("PERL5LIB",buf,++idx));
4160 while (my_trnlnm("PERLLIB",buf,idx++))
4161 incpush_use_sep(buf, 0, 0);
4166 #ifndef PERL_IS_MINIPERL
4167 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4168 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4170 /* Use the ~-expanded versions of APPLLIB (undocumented),
4171 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4174 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4175 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4179 /* sitearch is always relative to sitelib on Windows for
4180 * DLL-based path intuition to work correctly */
4181 # if !defined(WIN32)
4182 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4183 INCPUSH_CAN_RELOCATE);
4189 /* this picks up sitearch as well */
4190 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4192 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4194 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4198 #ifdef PERL_VENDORARCH_EXP
4199 /* vendorarch is always relative to vendorlib on Windows for
4200 * DLL-based path intuition to work correctly */
4201 # if !defined(WIN32)
4202 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4203 INCPUSH_CAN_RELOCATE);
4207 #ifdef PERL_VENDORLIB_EXP
4209 /* this picks up vendorarch as well */
4210 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4212 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4214 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4215 INCPUSH_CAN_RELOCATE);
4220 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4224 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4228 s = win32_get_privlib(PERL_FS_VERSION, &len);
4230 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4233 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4235 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4239 #ifdef PERL_OTHERLIBDIRS
4240 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4241 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4242 |INCPUSH_CAN_RELOCATE);
4248 * It isn't possible to delete an environment variable with
4249 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4250 * case we treat PERL5LIB as undefined if it has a zero-length value.
4252 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4253 if (perl5lib && *perl5lib != '\0')
4257 incpush_use_sep(perl5lib, 0,
4258 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4260 /* Treat PERL5?LIB as a possible search list logical name -- the
4261 * "natural" VMS idiom for a Unix path string. We allow each
4262 * element to be a set of |-separated directories for compatibility.
4266 if (my_trnlnm("PERL5LIB",buf,0))
4268 incpush_use_sep(buf, 0,
4269 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4270 } while (my_trnlnm("PERL5LIB",buf,++idx));
4274 /* Use the ~-expanded versions of APPLLIB (undocumented),
4275 SITELIB and VENDORLIB for older versions
4278 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4279 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4282 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4283 /* Search for version-specific dirs below here */
4284 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4285 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4289 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4290 /* Search for version-specific dirs below here */
4291 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4292 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4295 #ifdef PERL_OTHERLIBDIRS
4296 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4297 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4298 |INCPUSH_CAN_RELOCATE);
4300 #endif /* !PERL_IS_MINIPERL */
4303 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4306 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4307 # define PERLLIB_SEP ';'
4310 # define PERLLIB_SEP '|'
4312 # define PERLLIB_SEP ':'
4315 #ifndef PERLLIB_MANGLE
4316 # define PERLLIB_MANGLE(s,n) (s)
4319 /* Push a directory onto @INC if it exists.
4320 Generate a new SV if we do this, to save needing to copy the SV we push
4323 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4328 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4330 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4331 S_ISDIR(tmpstatbuf.st_mode)) {
4333 dir = newSVsv(stem);
4335 /* Truncate dir back to stem. */
4336 SvCUR_set(dir, SvCUR(stem));
4342 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4345 const U8 using_sub_dirs
4346 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4347 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4348 const U8 add_versioned_sub_dirs
4349 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4350 const U8 add_archonly_sub_dirs
4351 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4352 #ifdef PERL_INC_VERSION_LIST
4353 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4355 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4356 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4357 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4358 AV *const inc = GvAVn(PL_incgv);
4360 PERL_ARGS_ASSERT_INCPUSH;
4363 /* Could remove this vestigial extra block, if we don't mind a lot of
4364 re-indenting diff noise. */
4367 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4368 arranged to unshift #! line -I onto the front of @INC. However,
4369 -I can add version and architecture specific libraries, and they
4370 need to go first. The old code assumed that it was always
4371 pushing. Hence to make it work, need to push the architecture
4372 (etc) libraries onto a temporary array, then "unshift" that onto
4373 the front of @INC. */
4374 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4377 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4378 defined to so something (in os2/os2.c), but the code has been
4379 this way, ignoring any possible changed of length, since
4380 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4382 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4384 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4387 /* Do the if() outside the #ifdef to avoid warnings about an unused
4390 #ifdef PERL_RELOCATABLE_INC
4392 * Relocatable include entries are marked with a leading .../
4395 * 0: Remove that leading ".../"
4396 * 1: Remove trailing executable name (anything after the last '/')
4397 * from the perl path to give a perl prefix
4399 * While the @INC element starts "../" and the prefix ends with a real
4400 * directory (ie not . or ..) chop that real directory off the prefix
4401 * and the leading "../" from the @INC element. ie a logical "../"
4403 * Finally concatenate the prefix and the remainder of the @INC element
4404 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4405 * generates /usr/local/lib/perl5
4407 const char *libpath = SvPVX(libdir);
4408 STRLEN libpath_len = SvCUR(libdir);
4409 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4411 SV * const caret_X = get_sv("\030", 0);
4412 /* Going to use the SV just as a scratch buffer holding a C
4418 /* $^X is *the* source of taint if tainting is on, hence
4419 SvPOK() won't be true. */
4421 assert(SvPOKp(caret_X));
4422 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4424 /* Firstly take off the leading .../
4425 If all else fail we'll do the paths relative to the current
4427 sv_chop(libdir, libpath + 4);
4428 /* Don't use SvPV as we're intentionally bypassing taining,
4429 mortal copies that the mg_get of tainting creates, and
4430 corruption that seems to come via the save stack.
4431 I guess that the save stack isn't correctly set up yet. */
4432 libpath = SvPVX(libdir);
4433 libpath_len = SvCUR(libdir);
4435 /* This would work more efficiently with memrchr, but as it's
4436 only a GNU extension we'd need to probe for it and
4437 implement our own. Not hard, but maybe not worth it? */
4439 prefix = SvPVX(prefix_sv);
4440 lastslash = strrchr(prefix, '/');
4442 /* First time in with the *lastslash = '\0' we just wipe off
4443 the trailing /perl from (say) /usr/foo/bin/perl
4447 while ((*lastslash = '\0'), /* Do that, come what may. */
4448 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4449 && (lastslash = strrchr(prefix, '/')))) {
4450 if (lastslash[1] == '\0'
4451 || (lastslash[1] == '.'
4452 && (lastslash[2] == '/' /* ends "/." */
4453 || (lastslash[2] == '/'
4454 && lastslash[3] == '/' /* or "/.." */
4456 /* Prefix ends "/" or "/." or "/..", any of which
4457 are fishy, so don't do any more logical cleanup.
4461 /* Remove leading "../" from path */
4464 /* Next iteration round the loop removes the last
4465 directory name from prefix by writing a '\0' in
4466 the while clause. */
4468 /* prefix has been terminated with a '\0' to the correct
4469 length. libpath points somewhere into the libdir SV.
4470 We need to join the 2 with '/' and drop the result into
4472 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4473 SvREFCNT_dec(libdir);
4474 /* And this is the new libdir. */
4477 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4478 /* Need to taint reloccated paths if running set ID */
4479 SvTAINTED_on(libdir);
4482 SvREFCNT_dec(prefix_sv);
4487 * BEFORE pushing libdir onto @INC we may first push version- and
4488 * archname-specific sub-directories.
4490 if (using_sub_dirs) {
4492 #ifdef PERL_INC_VERSION_LIST
4493 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4494 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4495 const char * const *incver;
4502 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4504 while (unix[len-1] == '/') len--; /* Cosmetic */
4505 sv_usepvn(libdir,unix,len);
4508 PerlIO_printf(Perl_error_log,
4509 "Failed to unixify @INC element \"%s\"\n",
4513 subdir = newSVsv(libdir);
4515 if (add_versioned_sub_dirs) {
4516 /* .../version/archname if -d .../version/archname */
4517 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4518 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4520 /* .../version if -d .../version */
4521 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4522 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4525 #ifdef PERL_INC_VERSION_LIST
4527 for (incver = incverlist; *incver; incver++) {
4528 /* .../xxx if -d .../xxx */
4529 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4530 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4535 if (add_archonly_sub_dirs) {
4536 /* .../archname if -d .../archname */
4537 sv_catpvs(subdir, "/" ARCHNAME);
4538 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4542 assert (SvREFCNT(subdir) == 1);
4543 SvREFCNT_dec(subdir);
4546 /* finally add this lib directory at the end of @INC */
4548 U32 extra = av_len(av) + 1;
4549 av_unshift(inc, extra + push_basedir);
4551 av_store(inc, extra, libdir);
4553 /* av owns a reference, av_store() expects to be donated a
4554 reference, and av expects to be sane when it's cleared.
4555 If I wanted to be naughty and wrong, I could peek inside the
4556 implementation of av_clear(), realise that it uses
4557 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4558 and so directly steal from it (with a memcpy() to inc, and
4559 then memset() to NULL them out. But people copy code from the
4560 core expecting it to be best practise, so let's use the API.
4561 Although studious readers will note that I'm not checking any
4563 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4567 else if (push_basedir) {
4568 av_push(inc, libdir);
4571 if (!push_basedir) {
4572 assert (SvREFCNT(libdir) == 1);
4573 SvREFCNT_dec(libdir);
4579 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4583 /* This logic has been broken out from S_incpush(). It may be possible to
4586 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4593 /* Break at all separators */
4594 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4596 /* skip any consecutive separators */
4598 /* Uncomment the next line for PATH semantics */
4599 /* But you'll need to write tests */
4600 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4602 incpush(p, (STRLEN)(s - p), flags);
4607 incpush(p, (STRLEN)(end - p), flags);
4612 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4616 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4622 PERL_ARGS_ASSERT_CALL_LIST;
4624 while (av_len(paramList) >= 0) {
4625 cv = MUTABLE_CV(av_shift(paramList));
4627 if (paramList == PL_beginav) {
4628 /* save PL_beginav for compiler */
4629 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4631 else if (paramList == PL_checkav) {
4632 /* save PL_checkav for compiler */
4633 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4635 else if (paramList == PL_unitcheckav) {
4636 /* save PL_unitcheckav for compiler */
4637 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4648 PL_madskills |= 16384;
4653 PL_madskills &= ~16384;
4656 (void)SvPV_const(atsv, len);
4658 PL_curcop = &PL_compiling;
4659 CopLINE_set(PL_curcop, oldline);
4660 if (paramList == PL_beginav)
4661 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4663 Perl_sv_catpvf(aTHX_ atsv,
4664 "%s failed--call queue aborted",
4665 paramList == PL_checkav ? "CHECK"
4666 : paramList == PL_initav ? "INIT"
4667 : paramList == PL_unitcheckav ? "UNITCHECK"
4669 while (PL_scopestack_ix > oldscope)
4672 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4679 /* my_exit() was called */
4680 while (PL_scopestack_ix > oldscope)
4683 PL_curstash = PL_defstash;
4684 PL_curcop = &PL_compiling;
4685 CopLINE_set(PL_curcop, oldline);
4691 PL_curcop = &PL_compiling;
4692 CopLINE_set(PL_curcop, oldline);
4695 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4704 Perl_my_exit(pTHX_ U32 status)
4715 STATUS_EXIT_SET(status);
4722 Perl_my_failure_exit(pTHX)
4726 /* We have been called to fall on our sword. The desired exit code
4727 * should be already set in STATUS_UNIX, but could be shifted over
4728 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4731 * If an error code has not been set, then force the issue.
4733 if (MY_POSIX_EXIT) {
4735 /* According to the die_exit.t tests, if errno is non-zero */
4736 /* It should be used for the error status. */
4738 if (errno == EVMSERR) {
4739 STATUS_NATIVE = vaxc$errno;
4742 /* According to die_exit.t tests, if the child_exit code is */
4743 /* also zero, then we need to exit with a code of 255 */
4744 if ((errno != 0) && (errno < 256))
4745 STATUS_UNIX_EXIT_SET(errno);
4746 else if (STATUS_UNIX < 255) {
4747 STATUS_UNIX_EXIT_SET(255);
4752 /* The exit code could have been set by $? or vmsish which
4753 * means that it may not have fatal set. So convert
4754 * success/warning codes to fatal with out changing
4755 * the POSIX status code. The severity makes VMS native
4756 * status handling work, while UNIX mode programs use the
4757 * the POSIX exit codes.
4759 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4760 STATUS_NATIVE &= STS$M_COND_ID;
4761 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4765 /* Traditionally Perl on VMS always expects a Fatal Error. */
4766 if (vaxc$errno & 1) {
4768 /* So force success status to failure */
4769 if (STATUS_NATIVE & 1)
4774 STATUS_UNIX = EINTR; /* In case something cares */
4779 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4781 /* Encode the severity code */
4782 severity = STATUS_NATIVE & STS$M_SEVERITY;
4783 STATUS_UNIX = (severity ? severity : 1) << 8;
4785 /* Perl expects this to be a fatal error */
4786 if (severity != STS$K_SEVERE)
4795 STATUS_UNIX_SET(errno);
4797 exitstatus = STATUS_UNIX >> 8;
4798 if (exitstatus & 255)
4799 STATUS_UNIX_SET(exitstatus);
4801 STATUS_UNIX_SET(255);
4808 S_my_exit_jump(pTHX)
4813 SvREFCNT_dec(PL_e_script);
4817 POPSTACK_TO(PL_mainstack);
4825 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4828 const char * const p = SvPVX_const(PL_e_script);
4829 const char *nl = strchr(p, '\n');
4831 PERL_UNUSED_ARG(idx);
4832 PERL_UNUSED_ARG(maxlen);
4834 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4836 filter_del(read_e_script);