4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * by Larry Wall and others
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
27 #ifdef PERL_IS_MINIPERL
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
46 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
48 # include <sys/wait.h>
56 char control[CMSG_SPACE(sizeof(int))];
73 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
74 char *getenv (char *); /* Usually in <stdlib.h> */
77 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
79 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
80 /* Drop everything. Heck, don't even try to call it */
81 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
83 /* Drop almost everything */
84 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
109 MUTEX_INIT(&PL_dollarzero_mutex);
110 MUTEX_INIT(&PL_my_ctx_mutex);
113 #if defined(USE_ITHREADS)
116 /* This always happens for non-ithreads */
119 PERL_SET_THX(my_perl);
124 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
127 Perl_sys_init(int* argc, char*** argv)
131 PERL_ARGS_ASSERT_SYS_INIT;
133 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
134 PERL_UNUSED_ARG(argv);
135 PERL_SYS_INIT_BODY(argc, argv);
139 Perl_sys_init3(int* argc, char*** argv, char*** env)
143 PERL_ARGS_ASSERT_SYS_INIT3;
145 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
146 PERL_UNUSED_ARG(argv);
147 PERL_UNUSED_ARG(env);
148 PERL_SYS_INIT3_BODY(argc, argv, env);
155 if (!PL_veto_cleanup) {
156 PERL_SYS_TERM_BODY();
161 #ifdef PERL_IMPLICIT_SYS
163 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
164 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
165 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
166 struct IPerlDir* ipD, struct IPerlSock* ipS,
167 struct IPerlProc* ipP)
169 PerlInterpreter *my_perl;
171 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
173 /* Newx() needs interpreter, so call malloc() instead */
174 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
175 S_init_tls_and_interp(my_perl);
176 Zero(my_perl, 1, PerlInterpreter);
186 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
193 =head1 Embedding Functions
195 =for apidoc perl_alloc
197 Allocates a new Perl interpreter. See L<perlembed>.
205 PerlInterpreter *my_perl;
207 /* Newx() needs interpreter, so call malloc() instead */
208 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
210 S_init_tls_and_interp(my_perl);
211 #ifndef PERL_TRACK_MEMPOOL
212 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
214 Zero(my_perl, 1, PerlInterpreter);
215 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
219 #endif /* PERL_IMPLICIT_SYS */
222 =for apidoc perl_construct
224 Initializes a new Perl interpreter. See L<perlembed>.
230 perl_construct(pTHXx)
234 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
238 PL_perl_destruct_level = 1;
240 PERL_UNUSED_ARG(my_perl);
241 if (PL_perl_destruct_level > 0)
244 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
246 /* set read-only and try to insure than we wont see REFCNT==0
249 SvREADONLY_on(&PL_sv_undef);
250 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
252 sv_setpv(&PL_sv_no,PL_No);
253 /* value lookup in void context - happens to have the side effect
254 of caching the numeric forms. However, as &PL_sv_no doesn't contain
255 a string that is a valid numer, we have to turn the public flags by
261 SvREADONLY_on(&PL_sv_no);
262 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
264 sv_setpv(&PL_sv_yes,PL_Yes);
267 SvREADONLY_on(&PL_sv_yes);
268 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
270 SvREADONLY_on(&PL_sv_placeholder);
271 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
273 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
274 #ifdef PERL_USES_PL_PIDSTATUS
275 PL_pidstatus = newHV();
278 PL_rs = newSVpvs("\n");
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
304 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
305 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
307 /* First entry is a list of empty elements. It needs to be initialised
308 else all hell breaks loose in S_find_uninit_var(). */
309 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
310 PL_regex_pad = AvARRAY(PL_regex_padav);
312 #ifdef USE_REENTRANT_API
313 Perl_reentrant_init(aTHX);
316 /* Note that strtab is a rather special HV. Assumptions are made
317 about not iterating on it, and not adding tie magic to it.
318 It is properly deallocated in perl_destruct() */
321 HvSHAREKEYS_off(PL_strtab); /* mandatory */
322 hv_ksplit(PL_strtab, 512);
324 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
325 _dyld_lookup_and_bind
326 ("__environ", (unsigned long *) &environ_pointer, NULL);
330 # ifdef USE_ENVIRON_ARRAY
331 PL_origenviron = environ;
335 /* Use sysconf(_SC_CLK_TCK) if available, if not
336 * available or if the sysconf() fails, use the HZ.
337 * BeOS has those, but returns the wrong value.
338 * The HZ if not originally defined has been by now
339 * been defined as CLK_TCK, if available. */
340 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
341 PL_clocktick = sysconf(_SC_CLK_TCK);
342 if (PL_clocktick <= 0)
346 PL_stashcache = newHV();
348 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
349 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
395 PL_registered_mros = newHV();
396 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
397 HvMAX(PL_registered_mros) = 0;
403 =for apidoc nothreadhook
405 Stub that provides thread hook for perl_destruct when there are
412 Perl_nothreadhook(pTHX)
418 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
420 Perl_dump_sv_child(pTHX_ SV *sv)
423 const int sock = PL_dumper_fd;
424 const int debug_fd = PerlIO_fileno(Perl_debug_log);
425 union control_un control;
428 struct cmsghdr *cmptr;
430 unsigned char buffer[256];
432 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
434 if(sock == -1 || debug_fd == -1)
437 PerlIO_flush(Perl_debug_log);
439 /* All these shenanigans are to pass a file descriptor over to our child for
440 it to dump out to. We can't let it hold open the file descriptor when it
441 forks, as the file descriptor it will dump to can turn out to be one end
442 of pipe that some other process will wait on for EOF. (So as it would
443 be open, the wait would be forever.) */
445 msg.msg_control = control.control;
446 msg.msg_controllen = sizeof(control.control);
447 /* We're a connected socket so we don't need a destination */
453 cmptr = CMSG_FIRSTHDR(&msg);
454 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
455 cmptr->cmsg_level = SOL_SOCKET;
456 cmptr->cmsg_type = SCM_RIGHTS;
457 *((int *)CMSG_DATA(cmptr)) = 1;
459 vec[0].iov_base = (void*)&sv;
460 vec[0].iov_len = sizeof(sv);
461 got = sendmsg(sock, &msg, 0);
464 perror("Debug leaking scalars parent sendmsg failed");
467 if(got < sizeof(sv)) {
468 perror("Debug leaking scalars parent short sendmsg");
472 /* Return protocol is
474 unsigned char: length of location string (0 for empty)
475 unsigned char*: string (not terminated)
477 vec[0].iov_base = (void*)&returned_errno;
478 vec[0].iov_len = sizeof(returned_errno);
479 vec[1].iov_base = buffer;
482 got = readv(sock, vec, 2);
485 perror("Debug leaking scalars parent read failed");
486 PerlIO_flush(PerlIO_stderr());
489 if(got < sizeof(returned_errno) + 1) {
490 perror("Debug leaking scalars parent short read");
491 PerlIO_flush(PerlIO_stderr());
496 got = read(sock, buffer + 1, *buffer);
498 perror("Debug leaking scalars parent read 2 failed");
499 PerlIO_flush(PerlIO_stderr());
504 perror("Debug leaking scalars parent short read 2");
505 PerlIO_flush(PerlIO_stderr());
510 if (returned_errno || *buffer) {
511 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
512 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
513 returned_errno, strerror(returned_errno));
519 =for apidoc perl_destruct
521 Shuts down a Perl interpreter. See L<perlembed>.
530 VOL signed char destruct_level; /* see possible values in intrpvar.h */
532 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
536 PERL_ARGS_ASSERT_PERL_DESTRUCT;
538 PERL_UNUSED_ARG(my_perl);
541 assert(PL_scopestack_ix == 1);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c) {
565 PL_phase = PERL_PHASE_END;
566 call_list(PL_scopestack_ix, PL_endav);
572 assert(PL_scopestack_ix == 0);
574 /* Need to flush since END blocks can produce output */
577 if (PL_threadhook(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1] = {0};
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 /* note that PL_main_cv isn't usually actually freed at this point,
755 * due to the CvOUTSIDE refs from subs compiled within it. It will
756 * get freed once all the subs are freed in sv_clean_all(), for
757 * destruct_level > 0 */
758 SvREFCNT_dec(PL_main_cv);
760 PL_phase = PERL_PHASE_DESTRUCT;
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
779 /* unhook hooks which will soon be, or use, destroyed data */
780 SvREFCNT_dec(PL_warnhook);
782 SvREFCNT_dec(PL_diehook);
785 /* call exit list functions */
786 while (PL_exitlistlen-- > 0)
787 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
789 Safefree(PL_exitlist);
794 SvREFCNT_dec(PL_registered_mros);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
839 /* the syntax tree is shared between clones
840 * so op_free(PL_main_root) only ReREFCNT_dec's
841 * REGEXPs in the parent interpreter
842 * we need to manually ReREFCNT_dec for the clones
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
854 /* XXX can PL_parser still be non-null here? */
855 if(PL_parser && PL_parser->rsfp) {
856 (void)PerlIO_close(PL_parser->rsfp);
857 PL_parser->rsfp = NULL;
861 Safefree(PL_splitstr);
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_apiversion);
882 SvREFCNT_dec(PL_e_script);
888 /* magical thingies */
890 SvREFCNT_dec(PL_ofsgv); /* *, */
893 SvREFCNT_dec(PL_ors_sv); /* $\ */
896 SvREFCNT_dec(PL_rs); /* $/ */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
908 /* clean up after study() */
909 SvREFCNT_dec(PL_lastscream);
910 PL_lastscream = NULL;
911 Safefree(PL_screamfirst);
913 Safefree(PL_screamnext);
917 Safefree(PL_efloatbuf);
921 /* startup and shutdown function lists */
922 SvREFCNT_dec(PL_beginav);
923 SvREFCNT_dec(PL_beginav_save);
924 SvREFCNT_dec(PL_endav);
925 SvREFCNT_dec(PL_checkav);
926 SvREFCNT_dec(PL_checkav_save);
927 SvREFCNT_dec(PL_unitcheckav);
928 SvREFCNT_dec(PL_unitcheckav_save);
929 SvREFCNT_dec(PL_initav);
931 PL_beginav_save = NULL;
934 PL_checkav_save = NULL;
935 PL_unitcheckav = NULL;
936 PL_unitcheckav_save = NULL;
939 /* shortcuts just get cleared */
948 PL_last_in_gv = NULL;
960 SvREFCNT_dec(PL_argvout_stack);
961 PL_argvout_stack = NULL;
963 SvREFCNT_dec(PL_modglobal);
965 SvREFCNT_dec(PL_preambleav);
966 PL_preambleav = NULL;
967 SvREFCNT_dec(PL_subname);
969 #ifdef PERL_USES_PL_PIDSTATUS
970 SvREFCNT_dec(PL_pidstatus);
973 SvREFCNT_dec(PL_toptarget);
975 SvREFCNT_dec(PL_bodytarget);
976 PL_bodytarget = NULL;
977 PL_formtarget = NULL;
979 /* free locale stuff */
980 #ifdef USE_LOCALE_COLLATE
981 Safefree(PL_collation_name);
982 PL_collation_name = NULL;
985 #ifdef USE_LOCALE_NUMERIC
986 Safefree(PL_numeric_name);
987 PL_numeric_name = NULL;
988 SvREFCNT_dec(PL_numeric_radix_sv);
989 PL_numeric_radix_sv = NULL;
992 /* clear utf8 character classes */
993 SvREFCNT_dec(PL_utf8_alnum);
994 SvREFCNT_dec(PL_utf8_ascii);
995 SvREFCNT_dec(PL_utf8_alpha);
996 SvREFCNT_dec(PL_utf8_space);
997 SvREFCNT_dec(PL_utf8_cntrl);
998 SvREFCNT_dec(PL_utf8_graph);
999 SvREFCNT_dec(PL_utf8_digit);
1000 SvREFCNT_dec(PL_utf8_upper);
1001 SvREFCNT_dec(PL_utf8_lower);
1002 SvREFCNT_dec(PL_utf8_print);
1003 SvREFCNT_dec(PL_utf8_punct);
1004 SvREFCNT_dec(PL_utf8_xdigit);
1005 SvREFCNT_dec(PL_utf8_mark);
1006 SvREFCNT_dec(PL_utf8_toupper);
1007 SvREFCNT_dec(PL_utf8_totitle);
1008 SvREFCNT_dec(PL_utf8_tolower);
1009 SvREFCNT_dec(PL_utf8_tofold);
1010 SvREFCNT_dec(PL_utf8_idstart);
1011 SvREFCNT_dec(PL_utf8_idcont);
1012 SvREFCNT_dec(PL_utf8_foldclosures);
1013 PL_utf8_alnum = NULL;
1014 PL_utf8_ascii = NULL;
1015 PL_utf8_alpha = NULL;
1016 PL_utf8_space = NULL;
1017 PL_utf8_cntrl = NULL;
1018 PL_utf8_graph = NULL;
1019 PL_utf8_digit = NULL;
1020 PL_utf8_upper = NULL;
1021 PL_utf8_lower = NULL;
1022 PL_utf8_print = NULL;
1023 PL_utf8_punct = NULL;
1024 PL_utf8_xdigit = NULL;
1025 PL_utf8_mark = NULL;
1026 PL_utf8_toupper = NULL;
1027 PL_utf8_totitle = NULL;
1028 PL_utf8_tolower = NULL;
1029 PL_utf8_tofold = NULL;
1030 PL_utf8_idstart = NULL;
1031 PL_utf8_idcont = NULL;
1032 PL_utf8_foldclosures = NULL;
1034 if (!specialWARN(PL_compiling.cop_warnings))
1035 PerlMemShared_free(PL_compiling.cop_warnings);
1036 PL_compiling.cop_warnings = NULL;
1037 cophh_free(CopHINTHASH_get(&PL_compiling));
1038 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1039 CopFILE_free(&PL_compiling);
1040 CopSTASH_free(&PL_compiling);
1042 /* Prepare to destruct main symbol table. */
1045 /* break ref loop *:: <=> %:: */
1046 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1049 SvREFCNT_dec(PL_curstname);
1050 PL_curstname = NULL;
1052 /* clear queued errors */
1053 SvREFCNT_dec(PL_errors);
1056 SvREFCNT_dec(PL_isarev);
1059 if (destruct_level >= 2) {
1060 if (PL_scopestack_ix != 0)
1061 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1063 (long)PL_scopestack_ix);
1064 if (PL_savestack_ix != 0)
1065 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1066 "Unbalanced saves: %ld more saves than restores\n",
1067 (long)PL_savestack_ix);
1068 if (PL_tmps_floor != -1)
1069 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1070 (long)PL_tmps_floor + 1);
1071 if (cxstack_ix != -1)
1072 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1073 (long)cxstack_ix + 1);
1076 #ifdef PERL_IMPLICIT_CONTEXT
1077 /* the entries in this list are allocated via SV PVX's, so get freed
1078 * in sv_clean_all */
1079 Safefree(PL_my_cxt_list);
1082 /* Now absolutely destruct everything, somehow or other, loops or no. */
1084 /* the 2 is for PL_fdpid and PL_strtab */
1085 while (sv_clean_all() > 2)
1088 AvREAL_off(PL_fdpid); /* no surviving entries */
1089 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1092 #ifdef HAVE_INTERP_INTERN
1096 /* Destruct the global string table. */
1098 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1099 * so that sv_free() won't fail on them.
1100 * Now that the global string table is using a single hunk of memory
1101 * for both HE and HEK, we either need to explicitly unshare it the
1102 * correct way, or actually free things here.
1105 const I32 max = HvMAX(PL_strtab);
1106 HE * const * const array = HvARRAY(PL_strtab);
1107 HE *hent = array[0];
1110 if (hent && ckWARN_d(WARN_INTERNAL)) {
1111 HE * const next = HeNEXT(hent);
1112 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1113 "Unbalanced string table refcount: (%ld) for \"%s\"",
1114 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1121 hent = array[riter];
1126 HvARRAY(PL_strtab) = 0;
1127 HvTOTALKEYS(PL_strtab) = 0;
1129 SvREFCNT_dec(PL_strtab);
1132 /* free the pointer tables used for cloning */
1133 ptr_table_free(PL_ptr_table);
1134 PL_ptr_table = (PTR_TBL_t*)NULL;
1137 /* free special SVs */
1139 SvREFCNT(&PL_sv_yes) = 0;
1140 sv_clear(&PL_sv_yes);
1141 SvANY(&PL_sv_yes) = NULL;
1142 SvFLAGS(&PL_sv_yes) = 0;
1144 SvREFCNT(&PL_sv_no) = 0;
1145 sv_clear(&PL_sv_no);
1146 SvANY(&PL_sv_no) = NULL;
1147 SvFLAGS(&PL_sv_no) = 0;
1151 for (i=0; i<=2; i++) {
1152 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1153 sv_clear(PERL_DEBUG_PAD(i));
1154 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1155 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1159 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1160 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1162 #ifdef DEBUG_LEAKING_SCALARS
1163 if (PL_sv_count != 0) {
1168 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1169 svend = &sva[SvREFCNT(sva)];
1170 for (sv = sva + 1; sv < svend; ++sv) {
1171 if (SvTYPE(sv) != SVTYPEMASK) {
1172 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1174 " refcnt=%"UVuf pTHX__FORMAT "\n"
1175 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1177 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1179 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1181 sv->sv_debug_inpad ? "for" : "by",
1182 sv->sv_debug_optype ?
1183 PL_op_name[sv->sv_debug_optype]: "(none)",
1184 PTR2UV(sv->sv_debug_parent),
1187 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1188 Perl_dump_sv_child(aTHX_ sv);
1194 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1198 /* Wait for up to 4 seconds for child to terminate.
1199 This seems to be the least effort way of timing out on reaping
1201 struct timeval waitfor = {4, 0};
1202 int sock = PL_dumper_fd;
1206 FD_SET(sock, &rset);
1207 select(sock + 1, &rset, NULL, NULL, &waitfor);
1208 waitpid(child, &status, WNOHANG);
1213 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1219 #ifdef PERL_DEBUG_READONLY_OPS
1225 #if defined(PERLIO_LAYERS)
1226 /* No more IO - including error messages ! */
1227 PerlIO_cleanup(aTHX);
1230 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1231 as currently layers use it rather than NULL as a marker
1232 for no arg - and will try and SvREFCNT_dec it.
1234 SvREFCNT(&PL_sv_undef) = 0;
1235 SvREADONLY_off(&PL_sv_undef);
1237 Safefree(PL_origfilename);
1238 PL_origfilename = NULL;
1239 Safefree(PL_reg_start_tmp);
1240 PL_reg_start_tmp = (char**)NULL;
1241 PL_reg_start_tmpl = 0;
1242 Safefree(PL_reg_curpm);
1243 Safefree(PL_reg_poscache);
1244 free_tied_hv_pool();
1245 Safefree(PL_op_mask);
1246 Safefree(PL_psig_name);
1247 PL_psig_name = (SV**)NULL;
1248 PL_psig_ptr = (SV**)NULL;
1250 /* We need to NULL PL_psig_pend first, so that
1251 signal handlers know not to use it */
1252 int *psig_save = PL_psig_pend;
1253 PL_psig_pend = (int*)NULL;
1254 Safefree(psig_save);
1258 PL_tainting = FALSE;
1259 PL_taint_warn = FALSE;
1260 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1263 DEBUG_P(debprofdump());
1265 #ifdef USE_REENTRANT_API
1266 Perl_reentrant_free(aTHX);
1271 while (PL_regmatch_slab) {
1272 regmatch_slab *s = PL_regmatch_slab;
1273 PL_regmatch_slab = PL_regmatch_slab->next;
1277 /* As the absolutely last thing, free the non-arena SV for mess() */
1280 /* we know that type == SVt_PVMG */
1282 /* it could have accumulated taint magic */
1285 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1286 moremagic = mg->mg_moremagic;
1287 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1289 Safefree(mg->mg_ptr);
1293 /* we know that type >= SVt_PV */
1294 SvPV_free(PL_mess_sv);
1295 Safefree(SvANY(PL_mess_sv));
1296 Safefree(PL_mess_sv);
1303 =for apidoc perl_free
1305 Releases a Perl interpreter. See L<perlembed>.
1315 PERL_ARGS_ASSERT_PERL_FREE;
1317 if (PL_veto_cleanup)
1320 #ifdef PERL_TRACK_MEMPOOL
1323 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1324 * value as we're probably hunting memory leaks then
1326 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1327 if (!s || atoi(s) == 0) {
1328 const U32 old_debug = PL_debug;
1329 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1330 thread at thread exit. */
1332 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1333 "free this thread's memory\n");
1334 PL_debug &= ~ DEBUG_m_FLAG;
1336 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1337 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1338 PL_debug = old_debug;
1343 #if defined(WIN32) || defined(NETWARE)
1344 # if defined(PERL_IMPLICIT_SYS)
1347 void *host = nw_internal_host;
1349 void *host = w32_internal_host;
1351 PerlMem_free(aTHXx);
1353 nw_delete_internal_host(host);
1355 win32_delete_internal_host(host);
1359 PerlMem_free(aTHXx);
1362 PerlMem_free(aTHXx);
1366 #if defined(USE_ITHREADS)
1367 /* provide destructors to clean up the thread key when libperl is unloaded */
1368 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1370 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1371 #pragma fini "perl_fini"
1372 #elif defined(__sun) && !defined(__GNUC__)
1373 #pragma fini (perl_fini)
1377 #if defined(__GNUC__)
1378 __attribute__((destructor))
1383 if (PL_curinterp && !PL_veto_cleanup)
1388 #endif /* THREADS */
1391 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1394 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1395 PL_exitlist[PL_exitlistlen].fn = fn;
1396 PL_exitlist[PL_exitlistlen].ptr = ptr;
1400 #ifdef HAS_PROCSELFEXE
1401 /* This is a function so that we don't hold on to MAXPATHLEN
1402 bytes of stack longer than necessary
1405 S_procself_val(pTHX_ SV *sv, const char *arg0)
1407 char buf[MAXPATHLEN];
1408 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1410 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1411 includes a spurious NUL which will cause $^X to fail in system
1412 or backticks (this will prevent extensions from being built and
1413 many tests from working). readlink is not meant to add a NUL.
1414 Normal readlink works fine.
1416 if (len > 0 && buf[len-1] == '\0') {
1420 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1421 returning the text "unknown" from the readlink rather than the path
1422 to the executable (or returning an error from the readlink). Any valid
1423 path has a '/' in it somewhere, so use that to validate the result.
1424 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1426 if (len > 0 && memchr(buf, '/', len)) {
1427 sv_setpvn(sv,buf,len);
1433 #endif /* HAS_PROCSELFEXE */
1436 S_set_caret_X(pTHX) {
1438 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1440 #ifdef HAS_PROCSELFEXE
1441 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1444 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1446 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1453 =for apidoc perl_parse
1455 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1461 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1468 PERL_ARGS_ASSERT_PERL_PARSE;
1469 #ifndef MULTIPLICITY
1470 PERL_UNUSED_ARG(my_perl);
1473 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1474 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1475 * This MUST be done before any hash stores or fetches take place.
1476 * If you set PL_rehash_seed (and presumably also PL_rehash_seed_set)
1477 * yourself, it is your responsibility to provide a good random seed!
1478 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1479 if (!PL_rehash_seed_set)
1480 PL_rehash_seed = get_hash_seed();
1482 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1484 if (s && (atoi(s) == 1))
1485 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1487 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1492 if (PL_origalen != 0) {
1493 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1496 /* Set PL_origalen be the sum of the contiguous argv[]
1497 * elements plus the size of the env in case that it is
1498 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1499 * as the maximum modifiable length of $0. In the worst case
1500 * the area we are able to modify is limited to the size of
1501 * the original argv[0]. (See below for 'contiguous', though.)
1503 const char *s = NULL;
1506 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1507 /* Do the mask check only if the args seem like aligned. */
1509 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1511 /* See if all the arguments are contiguous in memory. Note
1512 * that 'contiguous' is a loose term because some platforms
1513 * align the argv[] and the envp[]. If the arguments look
1514 * like non-aligned, assume that they are 'strictly' or
1515 * 'traditionally' contiguous. If the arguments look like
1516 * aligned, we just check that they are within aligned
1517 * PTRSIZE bytes. As long as no system has something bizarre
1518 * like the argv[] interleaved with some other data, we are
1519 * fine. (Did I just evoke Murphy's Law?) --jhi */
1520 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1522 for (i = 1; i < PL_origargc; i++) {
1523 if ((PL_origargv[i] == s + 1
1525 || PL_origargv[i] == s + 2
1530 (PL_origargv[i] > s &&
1532 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1543 #ifndef PERL_USE_SAFE_PUTENV
1544 /* Can we grab env area too to be used as the area for $0? */
1545 if (s && PL_origenviron && !PL_use_safe_putenv) {
1546 if ((PL_origenviron[0] == s + 1)
1549 (PL_origenviron[0] > s &&
1550 PL_origenviron[0] <=
1551 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1555 s = PL_origenviron[0];
1558 my_setenv("NoNe SuCh", NULL);
1559 /* Force copy of environment. */
1560 for (i = 1; PL_origenviron[i]; i++) {
1561 if (PL_origenviron[i] == s + 1
1564 (PL_origenviron[i] > s &&
1565 PL_origenviron[i] <=
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1569 s = PL_origenviron[i];
1577 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1579 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1584 /* Come here if running an undumped a.out. */
1586 PL_origfilename = savepv(argv[0]);
1587 PL_do_undump = FALSE;
1588 cxstack_ix = -1; /* start label stack again */
1590 assert (!PL_tainted);
1592 S_set_caret_X(aTHX);
1594 init_postdump_symbols(argc,argv,env);
1599 op_free(PL_main_root);
1600 PL_main_root = NULL;
1602 PL_main_start = NULL;
1603 SvREFCNT_dec(PL_main_cv);
1607 oldscope = PL_scopestack_ix;
1608 PL_dowarn = G_WARN_OFF;
1613 parse_body(env,xsinit);
1614 if (PL_unitcheckav) {
1615 call_list(oldscope, PL_unitcheckav);
1618 PL_phase = PERL_PHASE_CHECK;
1619 call_list(oldscope, PL_checkav);
1627 /* my_exit() was called */
1628 while (PL_scopestack_ix > oldscope)
1631 PL_curstash = PL_defstash;
1632 if (PL_unitcheckav) {
1633 call_list(oldscope, PL_unitcheckav);
1636 PL_phase = PERL_PHASE_CHECK;
1637 call_list(oldscope, PL_checkav);
1642 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1650 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1651 miniperl, and we need to see those flags reflected in the values here. */
1653 /* What this returns is subject to change. Use the public interface in Config.
1656 S_Internals_V(pTHX_ CV *cv)
1659 #ifdef LOCAL_PATCH_COUNT
1660 const int local_patch_count = LOCAL_PATCH_COUNT;
1662 const int local_patch_count = 0;
1664 const int entries = 3 + local_patch_count;
1666 static char non_bincompat_options[] =
1673 # ifdef PERL_DISABLE_PMC
1676 # ifdef PERL_DONT_CREATE_GVSV
1677 " PERL_DONT_CREATE_GVSV"
1679 # ifdef PERL_EXTERNAL_GLOB
1680 " PERL_EXTERNAL_GLOB"
1682 # ifdef PERL_IS_MINIPERL
1685 # ifdef PERL_MALLOC_WRAP
1688 # ifdef PERL_MEM_LOG
1691 # ifdef PERL_MEM_LOG_NOIMPL
1692 " PERL_MEM_LOG_NOIMPL"
1694 # ifdef PERL_PRESERVE_IVUV
1695 " PERL_PRESERVE_IVUV"
1697 # ifdef PERL_USE_DEVEL
1700 # ifdef PERL_USE_SAFE_PUTENV
1701 " PERL_USE_SAFE_PUTENV"
1703 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1704 " USE_ATTRIBUTES_FOR_PERLIO"
1706 # ifdef USE_FAST_STDIO
1709 # ifdef USE_PERL_ATOF
1712 # ifdef USE_SITECUSTOMIZE
1713 " USE_SITECUSTOMIZE"
1716 PERL_UNUSED_ARG(cv);
1717 PERL_UNUSED_ARG(items);
1719 EXTEND(SP, entries);
1721 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1722 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1723 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1727 PUSHs(Perl_newSVpvn_flags(aTHX_
1728 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1731 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1735 PUSHs(&PL_sv_undef);
1738 for (i = 1; i <= local_patch_count; i++) {
1739 /* This will be an undef, if PL_localpatches[i] is NULL. */
1740 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1746 #define INCPUSH_UNSHIFT 0x01
1747 #define INCPUSH_ADD_OLD_VERS 0x02
1748 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1749 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1750 #define INCPUSH_NOT_BASEDIR 0x10
1751 #define INCPUSH_CAN_RELOCATE 0x20
1752 #define INCPUSH_ADD_SUB_DIRS \
1753 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1756 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1760 int argc = PL_origargc;
1761 char **argv = PL_origargv;
1762 const char *scriptname = NULL;
1763 VOL bool dosearch = FALSE;
1765 bool doextract = FALSE;
1766 const char *cddir = NULL;
1767 #ifdef USE_SITECUSTOMIZE
1768 bool minus_f = FALSE;
1770 SV *linestr_sv = newSV_type(SVt_PVIV);
1771 bool add_read_e_script = FALSE;
1773 PL_phase = PERL_PHASE_START;
1775 SvGROW(linestr_sv, 80);
1776 sv_setpvs(linestr_sv,"");
1782 for (argc--,argv++; argc > 0; argc--,argv++) {
1783 if (argv[0][0] != '-' || !argv[0][1])
1789 #ifndef PERL_STRICT_CR
1813 if ((s = moreswitches(s)))
1818 CHECK_MALLOC_TOO_LATE_FOR('t');
1819 if( !PL_tainting ) {
1820 PL_taint_warn = TRUE;
1826 CHECK_MALLOC_TOO_LATE_FOR('T');
1828 PL_taint_warn = FALSE;
1836 forbid_setid('e', FALSE);
1838 PL_e_script = newSVpvs("");
1839 add_read_e_script = TRUE;
1842 sv_catpv(PL_e_script, s);
1844 sv_catpv(PL_e_script, argv[1]);
1848 Perl_croak(aTHX_ "No code specified for -%c", c);
1849 sv_catpvs(PL_e_script, "\n");
1853 #ifdef USE_SITECUSTOMIZE
1859 case 'I': /* -I handled both here and in moreswitches() */
1860 forbid_setid('I', FALSE);
1861 if (!*++s && (s=argv[1]) != NULL) {
1865 STRLEN len = strlen(s);
1866 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1869 Perl_croak(aTHX_ "No directory specified for -I");
1872 forbid_setid('S', FALSE);
1881 opts_prog = newSVpvs("use Config; Config::_V()");
1885 opts_prog = Perl_newSVpvf(aTHX_
1886 "use Config; Config::config_vars(qw%c%s%c)",
1890 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1891 /* don't look for script or read stdin */
1892 scriptname = BIT_BUCKET;
1904 if (!*++s || isSPACE(*s)) {
1908 /* catch use of gnu style long options */
1909 if (strEQ(s, "version")) {
1913 if (strEQ(s, "help")) {
1920 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1931 #ifndef SECURE_INTERNAL_GETENV
1934 (s = PerlEnv_getenv("PERL5OPT")))
1938 if (*s == '-' && *(s+1) == 'T') {
1939 CHECK_MALLOC_TOO_LATE_FOR('T');
1941 PL_taint_warn = FALSE;
1944 char *popt_copy = NULL;
1957 if (!strchr("CDIMUdmtwW", *s))
1958 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1962 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1963 s = popt_copy + (s - d);
1971 if( !PL_tainting ) {
1972 PL_taint_warn = TRUE;
1983 /* Set $^X early so that it can be used for relocatable paths in @INC */
1984 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
1985 assert (!PL_tainted);
1987 S_set_caret_X(aTHX);
1990 #if defined(USE_SITECUSTOMIZE)
1992 /* The games with local $! are to avoid setting errno if there is no
1993 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
1994 ie a q() operator with a NUL byte as a the delimiter. This avoids
1995 problems with pathnames containing (say) ' */
1996 # ifdef PERL_IS_MINIPERL
1997 AV *const inc = GvAV(PL_incgv);
1998 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2001 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2003 "BEGIN { do {local $!; -f q%c%"SVf"/buildcustomize.pl%c} && do q%c%"SVf"/buildcustomize.pl%c }",
2008 /* SITELIB_EXP is a function call on Win32. */
2009 const char *const raw_sitelib = SITELIB_EXP;
2010 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2011 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2012 INCPUSH_CAN_RELOCATE);
2013 const char *const sitelib = SvPVX(sitelib_sv);
2014 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2016 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2019 assert (SvREFCNT(sitelib_sv) == 1);
2020 SvREFCNT_dec(sitelib_sv);
2026 scriptname = argv[0];
2029 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2031 else if (scriptname == NULL) {
2033 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2039 assert (!PL_tainted);
2043 bool suidscript = FALSE;
2045 open_script(scriptname, dosearch, &suidscript, &rsfp);
2047 validate_suid(validarg, scriptname, fdscript, suidscript,
2051 # if defined(SIGCHLD) || defined(SIGCLD)
2054 # define SIGCHLD SIGCLD
2056 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2057 if (sigstate == (Sighandler_t) SIG_IGN) {
2058 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2059 "Can't ignore signal CHLD, forcing to default");
2060 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2068 /* This will croak if suidscript is true, as -x cannot be used with
2070 forbid_setid('x', suidscript);
2071 /* Hence you can't get here if suidscript is true */
2073 find_beginning(linestr_sv, rsfp);
2074 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2075 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2079 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2080 CvUNIQUE_on(PL_compcv);
2082 CvPADLIST(PL_compcv) = pad_new(0);
2084 PL_isarev = newHV();
2087 boot_core_UNIVERSAL();
2089 newXS("Internals::V", S_Internals_V, __FILE__);
2092 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2094 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2100 # ifdef HAS_SOCKS5_INIT
2101 socks5_init(argv[0]);
2107 init_predump_symbols();
2108 /* init_postdump_symbols not currently designed to be called */
2109 /* more than once (ENV isn't cleared first, for example) */
2110 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2112 init_postdump_symbols(argc,argv,env);
2114 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2115 * or explicitly in some platforms.
2116 * locale.c:Perl_init_i18nl10n() if the environment
2117 * look like the user wants to use UTF-8. */
2118 #if defined(__SYMBIAN32__)
2119 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2121 # ifndef PERL_IS_MINIPERL
2123 /* Requires init_predump_symbols(). */
2124 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2129 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2130 * and the default open disciplines. */
2131 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2132 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2134 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2135 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2136 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2138 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2139 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2140 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2142 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2143 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2144 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2146 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2147 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2150 sv_setpvs(sv, ":utf8\0:utf8");
2152 sv_setpvs(sv, ":utf8\0");
2155 sv_setpvs(sv, "\0:utf8");
2164 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2165 if (strEQ(s, "unsafe"))
2166 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2167 else if (strEQ(s, "safe"))
2168 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2170 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2177 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2181 PL_xmlfp = PerlIO_stdout();
2183 PL_xmlfp = PerlIO_open(s, "w");
2185 Perl_croak(aTHX_ "Can't open %s", s);
2187 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2193 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2194 PL_madskills = atoi(s);
2195 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2200 lex_start(linestr_sv, rsfp, 0);
2201 PL_subname = newSVpvs("main");
2203 if (add_read_e_script)
2204 filter_add(read_e_script, NULL);
2206 /* now parse the script */
2208 SETERRNO(0,SS_NORMAL);
2209 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2211 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2213 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2217 CopLINE_set(PL_curcop, 0);
2218 PL_curstash = PL_defstash;
2220 SvREFCNT_dec(PL_e_script);
2228 SAVECOPFILE(PL_curcop);
2229 SAVECOPLINE(PL_curcop);
2230 gv_check(PL_defstash);
2239 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2240 dump_mstats("after compilation:");
2245 PL_restartjmpenv = NULL;
2251 =for apidoc perl_run
2253 Tells a Perl interpreter to run. See L<perlembed>.
2266 PERL_ARGS_ASSERT_PERL_RUN;
2267 #ifndef MULTIPLICITY
2268 PERL_UNUSED_ARG(my_perl);
2271 oldscope = PL_scopestack_ix;
2279 cxstack_ix = -1; /* start context stack again */
2281 case 0: /* normal completion */
2285 case 2: /* my_exit() */
2286 while (PL_scopestack_ix > oldscope)
2289 PL_curstash = PL_defstash;
2290 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2291 PL_endav && !PL_minus_c) {
2292 PL_phase = PERL_PHASE_END;
2293 call_list(oldscope, PL_endav);
2296 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2297 dump_mstats("after execution: ");
2303 POPSTACK_TO(PL_mainstack);
2306 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2317 S_run_body(pTHX_ I32 oldscope)
2320 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2321 PL_sawampersand ? "Enabling" : "Omitting"));
2323 if (!PL_restartop) {
2327 exit(0); /* less likely to core dump than my_exit(0) */
2331 if (DEBUG_x_TEST || DEBUG_B_TEST)
2332 dump_all_perl(!DEBUG_B_TEST);
2334 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2338 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2341 if (PERLDB_SINGLE && PL_DBsingle)
2342 sv_setiv(PL_DBsingle, 1);
2344 PL_phase = PERL_PHASE_INIT;
2345 call_list(oldscope, PL_initav);
2347 #ifdef PERL_DEBUG_READONLY_OPS
2348 Perl_pending_Slabs_to_ro(aTHX);
2354 PL_phase = PERL_PHASE_RUN;
2357 PL_restartjmpenv = NULL;
2358 PL_op = PL_restartop;
2362 else if (PL_main_start) {
2363 CvDEPTH(PL_main_cv) = 1;
2364 PL_op = PL_main_start;
2372 =head1 SV Manipulation Functions
2374 =for apidoc p||get_sv
2376 Returns the SV of the specified Perl scalar. C<flags> are passed to
2377 C<gv_fetchpv>. If C<GV_ADD> is set and the
2378 Perl variable does not exist then it will be created. If C<flags> is zero
2379 and the variable does not exist then NULL is returned.
2385 Perl_get_sv(pTHX_ const char *name, I32 flags)
2389 PERL_ARGS_ASSERT_GET_SV;
2391 gv = gv_fetchpv(name, flags, SVt_PV);
2398 =head1 Array Manipulation Functions
2400 =for apidoc p||get_av
2402 Returns the AV of the specified Perl array. C<flags> are passed to
2403 C<gv_fetchpv>. If C<GV_ADD> is set and the
2404 Perl variable does not exist then it will be created. If C<flags> is zero
2405 and the variable does not exist then NULL is returned.
2411 Perl_get_av(pTHX_ const char *name, I32 flags)
2413 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2415 PERL_ARGS_ASSERT_GET_AV;
2425 =head1 Hash Manipulation Functions
2427 =for apidoc p||get_hv
2429 Returns the HV of the specified Perl hash. C<flags> are passed to
2430 C<gv_fetchpv>. If C<GV_ADD> is set and the
2431 Perl variable does not exist then it will be created. If C<flags> is zero
2432 and the variable does not exist then NULL is returned.
2438 Perl_get_hv(pTHX_ const char *name, I32 flags)
2440 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2442 PERL_ARGS_ASSERT_GET_HV;
2452 =head1 CV Manipulation Functions
2454 =for apidoc p||get_cvn_flags
2456 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2457 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2458 exist then it will be declared (which has the same effect as saying
2459 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2460 then NULL is returned.
2462 =for apidoc p||get_cv
2464 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2470 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2472 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2473 /* XXX this is probably not what they think they're getting.
2474 * It has the same effect as "sub name;", i.e. just a forward
2477 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2479 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2480 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2481 return newSUB(start_subparse(FALSE, 0),
2482 newSVOP(OP_CONST, 0, sv),
2490 /* Nothing in core calls this now, but we can't replace it with a macro and
2491 move it to mathoms.c as a macro would evaluate name twice. */
2493 Perl_get_cv(pTHX_ const char *name, I32 flags)
2495 PERL_ARGS_ASSERT_GET_CV;
2497 return get_cvn_flags(name, strlen(name), flags);
2500 /* Be sure to refetch the stack pointer after calling these routines. */
2504 =head1 Callback Functions
2506 =for apidoc p||call_argv
2508 Performs a callback to the specified Perl sub. See L<perlcall>.
2514 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2516 /* See G_* flags in cop.h */
2517 /* null terminated arg list */
2522 PERL_ARGS_ASSERT_CALL_ARGV;
2527 mXPUSHs(newSVpv(*argv,0));
2532 return call_pv(sub_name, flags);
2536 =for apidoc p||call_pv
2538 Performs a callback to the specified Perl sub. See L<perlcall>.
2544 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2545 /* name of the subroutine */
2546 /* See G_* flags in cop.h */
2548 PERL_ARGS_ASSERT_CALL_PV;
2550 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2554 =for apidoc p||call_method
2556 Performs a callback to the specified Perl method. The blessed object must
2557 be on the stack. See L<perlcall>.
2563 Perl_call_method(pTHX_ const char *methname, I32 flags)
2564 /* name of the subroutine */
2565 /* See G_* flags in cop.h */
2568 PERL_ARGS_ASSERT_CALL_METHOD;
2570 len = strlen(methname);
2572 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2573 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2576 /* May be called with any of a CV, a GV, or an SV containing the name. */
2578 =for apidoc p||call_sv
2580 Performs a callback to the Perl sub whose name is in the SV. See
2587 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2588 /* See G_* flags in cop.h */
2591 LOGOP myop; /* fake syntax tree node */
2596 bool oldcatch = CATCH_GET;
2598 OP* const oldop = PL_op;
2601 PERL_ARGS_ASSERT_CALL_SV;
2603 if (flags & G_DISCARD) {
2607 if (!(flags & G_WANT)) {
2608 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2613 Zero(&myop, 1, LOGOP);
2614 myop.op_next = NULL;
2615 if (!(flags & G_NOARGS))
2616 myop.op_flags |= OPf_STACKED;
2617 myop.op_flags |= OP_GIMME_REVERSE(flags);
2621 EXTEND(PL_stack_sp, 1);
2622 *++PL_stack_sp = sv;
2624 oldscope = PL_scopestack_ix;
2626 if (PERLDB_SUB && PL_curstash != PL_debstash
2627 /* Handle first BEGIN of -d. */
2628 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2629 /* Try harder, since this may have been a sighandler, thus
2630 * curstash may be meaningless. */
2631 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2632 && !(flags & G_NODEBUG))
2633 PL_op->op_private |= OPpENTERSUB_DB;
2635 if (flags & G_METHOD) {
2636 Zero(&method_op, 1, UNOP);
2637 method_op.op_next = PL_op;
2638 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2639 method_op.op_type = OP_METHOD;
2640 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2641 myop.op_type = OP_ENTERSUB;
2642 PL_op = (OP*)&method_op;
2645 if (!(flags & G_EVAL)) {
2647 CALL_BODY_SUB((OP*)&myop);
2648 retval = PL_stack_sp - (PL_stack_base + oldmark);
2649 CATCH_SET(oldcatch);
2652 myop.op_other = (OP*)&myop;
2654 create_eval_scope(flags|G_FAKINGEVAL);
2662 CALL_BODY_SUB((OP*)&myop);
2663 retval = PL_stack_sp - (PL_stack_base + oldmark);
2664 if (!(flags & G_KEEPERR)) {
2672 /* my_exit() was called */
2673 PL_curstash = PL_defstash;
2680 PL_restartjmpenv = NULL;
2681 PL_op = PL_restartop;
2685 PL_stack_sp = PL_stack_base + oldmark;
2686 if ((flags & G_WANT) == G_ARRAY)
2690 *++PL_stack_sp = &PL_sv_undef;
2695 if (PL_scopestack_ix > oldscope)
2696 delete_eval_scope();
2700 if (flags & G_DISCARD) {
2701 PL_stack_sp = PL_stack_base + oldmark;
2710 /* Eval a string. The G_EVAL flag is always assumed. */
2713 =for apidoc p||eval_sv
2715 Tells Perl to C<eval> the string in the SV. It supports the same flags
2716 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2722 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2724 /* See G_* flags in cop.h */
2728 UNOP myop; /* fake syntax tree node */
2729 VOL I32 oldmark = SP - PL_stack_base;
2732 OP* const oldop = PL_op;
2735 PERL_ARGS_ASSERT_EVAL_SV;
2737 if (flags & G_DISCARD) {
2744 Zero(PL_op, 1, UNOP);
2745 EXTEND(PL_stack_sp, 1);
2746 *++PL_stack_sp = sv;
2748 if (!(flags & G_NOARGS))
2749 myop.op_flags = OPf_STACKED;
2750 myop.op_next = NULL;
2751 myop.op_type = OP_ENTEREVAL;
2752 myop.op_flags |= OP_GIMME_REVERSE(flags);
2753 if (flags & G_KEEPERR)
2754 myop.op_flags |= OPf_SPECIAL;
2756 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2757 * before a PUSHEVAL, which corrupts the stack after a croak */
2758 TAINT_PROPER("eval_sv()");
2764 if (PL_op == (OP*)(&myop)) {
2765 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2767 goto fail; /* failed in compilation */
2770 retval = PL_stack_sp - (PL_stack_base + oldmark);
2771 if (!(flags & G_KEEPERR)) {
2779 /* my_exit() was called */
2780 PL_curstash = PL_defstash;
2787 PL_restartjmpenv = NULL;
2788 PL_op = PL_restartop;
2793 PL_stack_sp = PL_stack_base + oldmark;
2794 if ((flags & G_WANT) == G_ARRAY)
2798 *++PL_stack_sp = &PL_sv_undef;
2804 if (flags & G_DISCARD) {
2805 PL_stack_sp = PL_stack_base + oldmark;
2815 =for apidoc p||eval_pv
2817 Tells Perl to C<eval> the given string and return an SV* result.
2823 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2827 SV* sv = newSVpv(p, 0);
2829 PERL_ARGS_ASSERT_EVAL_PV;
2831 eval_sv(sv, G_SCALAR);
2838 if (croak_on_error && SvTRUE(ERRSV)) {
2839 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2845 /* Require a module. */
2848 =head1 Embedding Functions
2850 =for apidoc p||require_pv
2852 Tells Perl to C<require> the file named by the string argument. It is
2853 analogous to the Perl code C<eval "require '$file'">. It's even
2854 implemented that way; consider using load_module instead.
2859 Perl_require_pv(pTHX_ const char *pv)
2865 PERL_ARGS_ASSERT_REQUIRE_PV;
2867 PUSHSTACKi(PERLSI_REQUIRE);
2869 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2870 eval_sv(sv_2mortal(sv), G_DISCARD);
2876 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2878 /* This message really ought to be max 23 lines.
2879 * Removed -h because the user already knows that option. Others? */
2881 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2882 minimum of 509 character string literals. */
2883 static const char * const usage_msg[] = {
2884 " -0[octal] specify record separator (\\0, if no argument)\n"
2885 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2886 " -C[number/list] enables the listed Unicode features\n"
2887 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2888 " -d[:debugger] run program under debugger\n"
2889 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2890 " -e program one line of program (several -e's allowed, omit programfile)\n"
2891 " -E program like -e, but enables all optional features\n"
2892 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2893 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2894 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2895 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2896 " -l[octal] enable line ending processing, specifies line terminator\n"
2897 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2898 " -n assume \"while (<>) { ... }\" loop around program\n"
2899 " -p assume loop like -n but print line also, like sed\n"
2900 " -s enable rudimentary parsing for switches after programfile\n"
2901 " -S look for programfile using PATH environment variable\n",
2902 " -t enable tainting warnings\n"
2903 " -T enable tainting checks\n"
2904 " -u dump core after parsing program\n"
2905 " -U allow unsafe operations\n"
2906 " -v print version, patchlevel and license\n"
2907 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2908 " -w enable many useful warnings\n"
2909 " -W enable all warnings\n"
2910 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2911 " -X disable all warnings\n"
2913 "Run 'perldoc perl' for more help with Perl.\n\n",
2916 const char * const *p = usage_msg;
2917 PerlIO *out = PerlIO_stdout();
2919 PERL_ARGS_ASSERT_USAGE;
2922 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2925 PerlIO_puts(out, *p++);
2928 /* convert a string of -D options (or digits) into an int.
2929 * sets *s to point to the char after the options */
2933 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2935 static const char * const usage_msgd[] = {
2936 " Debugging flag values: (see also -d)\n"
2937 " p Tokenizing and parsing (with v, displays parse stack)\n"
2938 " s Stack snapshots (with v, displays all stacks)\n"
2939 " l Context (loop) stack processing\n"
2940 " t Trace execution\n"
2941 " o Method and overloading resolution\n",
2942 " c String/numeric conversions\n"
2943 " P Print profiling info, source file input state\n"
2944 " m Memory and SV allocation\n"
2945 " f Format processing\n"
2946 " r Regular expression parsing and execution\n"
2947 " x Syntax tree dump\n",
2948 " u Tainting checks\n"
2949 " H Hash dump -- usurps values()\n"
2950 " X Scratchpad allocation\n"
2953 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2954 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2955 " v Verbose: use in conjunction with other flags\n"
2956 " C Copy On Write\n"
2957 " A Consistency checks on internal structures\n"
2958 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2959 " M trace smart match resolution\n"
2960 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2965 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2968 /* if adding extra options, remember to update DEBUG_MASK */
2969 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2971 for (; isALNUM(**s); (*s)++) {
2972 const char * const d = strchr(debopts,**s);
2974 i |= 1 << (d - debopts);
2975 else if (ckWARN_d(WARN_DEBUGGING))
2976 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2977 "invalid option -D%c, use -D'' to see choices\n", **s);
2980 else if (isDIGIT(**s)) {
2982 for (; isALNUM(**s); (*s)++) ;
2984 else if (givehelp) {
2985 const char *const *p = usage_msgd;
2986 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2989 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2990 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2991 "-Dp not implemented on this platform\n");
2997 /* This routine handles any switches that can be given during run */
3000 Perl_moreswitches(pTHX_ const char *s)
3004 const char option = *s; /* used to remember option in -m/-M code */
3006 PERL_ARGS_ASSERT_MORESWITCHES;
3014 SvREFCNT_dec(PL_rs);
3015 if (s[1] == 'x' && s[2]) {
3016 const char *e = s+=2;
3022 flags = PERL_SCAN_SILENT_ILLDIGIT;
3023 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3024 if (s + numlen < e) {
3025 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3029 PL_rs = newSVpvs("");
3030 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3031 tmps = (U8*)SvPVX(PL_rs);
3032 uvchr_to_utf8(tmps, rschar);
3033 SvCUR_set(PL_rs, UNISKIP(rschar));
3038 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3039 if (rschar & ~((U8)~0))
3040 PL_rs = &PL_sv_undef;
3041 else if (!rschar && numlen >= 2)
3042 PL_rs = newSVpvs("");
3044 char ch = (char)rschar;
3045 PL_rs = newSVpvn(&ch, 1);
3048 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3053 PL_unicode = parse_unicode_opts( (const char **)&s );
3054 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3060 while (*s && !isSPACE(*s)) ++s;
3061 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3072 forbid_setid('d', FALSE);
3075 /* -dt indicates to the debugger that threads will be used */
3076 if (*s == 't' && !isALNUM(s[1])) {
3078 my_setenv("PERL5DB_THREADED", "1");
3081 /* The following permits -d:Mod to accepts arguments following an =
3082 in the fashion that -MSome::Mod does. */
3083 if (*s == ':' || *s == '=') {
3090 sv = newSVpvs("no Devel::");
3092 sv = newSVpvs("use Devel::");
3096 end = s + strlen(s);
3098 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3099 while(isALNUM(*s) || *s==':') ++s;
3101 sv_catpvn(sv, start, end - start);
3103 sv_catpvn(sv, start, s-start);
3104 /* Don't use NUL as q// delimiter here, this string goes in the
3106 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3109 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3113 PL_perldb = PERLDB_ALL;
3120 forbid_setid('D', FALSE);
3122 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3123 #else /* !DEBUGGING */
3124 if (ckWARN_d(WARN_DEBUGGING))
3125 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3126 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3127 for (s++; isALNUM(*s); s++) ;
3132 usage(PL_origargv[0]);
3135 Safefree(PL_inplace);
3136 #if defined(__CYGWIN__) /* do backup extension automagically */
3137 if (*(s+1) == '\0') {
3138 PL_inplace = savepvs(".bak");
3141 #endif /* __CYGWIN__ */
3143 const char * const start = ++s;
3144 while (*s && !isSPACE(*s))
3147 PL_inplace = savepvn(start, s - start);
3151 if (*s == '-') /* Additional switches on #! line. */
3155 case 'I': /* -I handled both here and in parse_body() */
3156 forbid_setid('I', FALSE);
3158 while (*s && isSPACE(*s))
3163 /* ignore trailing spaces (possibly followed by other switches) */
3165 for (e = p; *e && !isSPACE(*e); e++) ;
3169 } while (*p && *p != '-');
3171 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3177 Perl_croak(aTHX_ "No directory specified for -I");
3183 SvREFCNT_dec(PL_ors_sv);
3189 PL_ors_sv = newSVpvs("\n");
3190 numlen = 3 + (*s == '0');
3191 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3195 if (RsPARA(PL_rs)) {
3196 PL_ors_sv = newSVpvs("\n\n");
3199 PL_ors_sv = newSVsv(PL_rs);
3204 forbid_setid('M', FALSE); /* XXX ? */
3207 forbid_setid('m', FALSE); /* XXX ? */
3212 const char *use = "use ";
3214 /* -M-foo == 'no foo' */
3215 /* Leading space on " no " is deliberate, to make both
3216 possibilities the same length. */
3217 if (*s == '-') { use = " no "; ++s; }
3218 sv = newSVpvn(use,4);
3220 /* We allow -M'Module qw(Foo Bar)' */
3221 while(isALNUM(*s) || *s==':') {
3230 Perl_croak(aTHX_ "Module name required with -%c option",
3233 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3234 "contains single ':'",
3235 (int)(s - start), start, option);
3236 end = s + strlen(s);
3238 sv_catpvn(sv, start, end - start);
3239 if (option == 'm') {
3241 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3242 sv_catpvs( sv, " ()");
3245 sv_catpvn(sv, start, s-start);
3246 /* Use NUL as q''-delimiter. */
3247 sv_catpvs(sv, " split(/,/,q\0");
3249 sv_catpvn(sv, s, end - s);
3250 sv_catpvs(sv, "\0)");
3253 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3256 Perl_croak(aTHX_ "Missing argument to -%c", option);
3267 forbid_setid('s', FALSE);
3268 PL_doswitches = TRUE;
3282 PL_do_undump = TRUE;
3290 if (!sv_derived_from(PL_patchlevel, "version"))
3291 upg_version(PL_patchlevel, TRUE);
3294 SV* level= vstringify(PL_patchlevel);
3295 #ifdef PERL_PATCHNUM
3296 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3297 SV *num = newSVpvs(PERL_PATCHNUM "*");
3299 SV *num = newSVpvs(PERL_PATCHNUM);
3302 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3303 SvREFCNT_dec(level);
3306 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3310 PerlIO_printf(PerlIO_stdout(),
3311 "\nThis is perl " STRINGIFY(PERL_REVISION)
3312 ", version " STRINGIFY(PERL_VERSION)
3313 ", subversion " STRINGIFY(PERL_SUBVERSION)
3314 " (%"SVf") built for " ARCHNAME, level
3316 SvREFCNT_dec(level);
3319 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3322 SVfARG(vstringify(PL_patchlevel))));
3323 PerlIO_printf(PerlIO_stdout(),
3324 Perl_form(aTHX_ " built under %s at %s %s\n",
3325 OSNAME, __DATE__, __TIME__));
3326 PerlIO_printf(PerlIO_stdout(),
3327 Perl_form(aTHX_ " OS Specific Release: %s\n",
3330 #if defined(LOCAL_PATCH_COUNT)
3331 if (LOCAL_PATCH_COUNT > 0)
3332 PerlIO_printf(PerlIO_stdout(),
3333 "\n(with %d registered patch%s, "
3334 "see perl -V for more detail)",
3336 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "\n\nCopyright 1987-2012, Larry Wall\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3348 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3353 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "atariST series port, ++jrb bammi@cadence.com\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "EPOC port by Olaf Flebbe, 1999-2002\n");
3388 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3389 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3392 #ifdef __SYMBIAN32__
3393 PerlIO_printf(PerlIO_stdout(),
3394 "Symbian port by Nokia, 2004-2005\n");
3396 #ifdef BINARY_BUILD_NOTICE
3397 BINARY_BUILD_NOTICE;
3399 PerlIO_printf(PerlIO_stdout(),
3401 Perl may be copied only under the terms of either the Artistic License or the\n\
3402 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3403 Complete documentation for Perl, including FAQ lists, should be found on\n\
3404 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3405 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3408 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3409 PL_dowarn |= G_WARN_ON;
3414 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3415 if (!specialWARN(PL_compiling.cop_warnings))
3416 PerlMemShared_free(PL_compiling.cop_warnings);
3417 PL_compiling.cop_warnings = pWARN_ALL ;
3421 PL_dowarn = G_WARN_ALL_OFF;
3422 if (!specialWARN(PL_compiling.cop_warnings))
3423 PerlMemShared_free(PL_compiling.cop_warnings);
3424 PL_compiling.cop_warnings = pWARN_NONE ;
3431 if (s[0] == '-') /* Additional switches on #! line. */
3436 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3442 #ifdef ALTERNATE_SHEBANG
3443 case 'S': /* OS/2 needs -S on "extproc" line. */
3447 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3452 /* compliments of Tom Christiansen */
3454 /* unexec() can be found in the Gnu emacs distribution */
3455 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3458 Perl_my_unexec(pTHX)
3460 PERL_UNUSED_CONTEXT;
3462 SV * prog = newSVpv(BIN_EXP, 0);
3463 SV * file = newSVpv(PL_origfilename, 0);
3467 sv_catpvs(prog, "/perl");
3468 sv_catpvs(file, ".perldump");
3470 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3471 /* unexec prints msg to stderr in case of failure */
3472 PerlProc_exit(status);
3475 # include <lib$routines.h>
3476 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3477 # elif defined(WIN32) || defined(__CYGWIN__)
3478 Perl_croak(aTHX_ "dump is not supported");
3480 ABORT(); /* for use with undump */
3485 /* initialize curinterp */
3491 # define PERLVAR(var,type)
3492 # define PERLVARA(var,n,type)
3493 # if defined(PERL_IMPLICIT_CONTEXT)
3494 # define PERLVARI(var,type,init) aTHX->var = init;
3495 # define PERLVARIC(var,type,init) aTHX->var = init;
3497 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3498 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3500 # include "intrpvar.h"
3506 # define PERLVAR(var,type)
3507 # define PERLVARA(var,n,type)
3508 # define PERLVARI(var,type,init) PL_##var = init;
3509 # define PERLVARIC(var,type,init) PL_##var = init;
3510 # include "intrpvar.h"
3517 /* As these are inside a structure, PERLVARI isn't capable of initialising
3519 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3520 PL_reg_poscache = PL_reg_starttry = NULL;
3524 S_init_main_stash(pTHX)
3529 PL_curstash = PL_defstash = newHV();
3530 /* We know that the string "main" will be in the global shared string
3531 table, so it's a small saving to use it rather than allocate another
3533 PL_curstname = newSVpvs_share("main");
3534 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3535 /* If we hadn't caused another reference to "main" to be in the shared
3536 string table above, then it would be worth reordering these two,
3537 because otherwise all we do is delete "main" from it as a consequence
3538 of the SvREFCNT_dec, only to add it again with hv_name_set */
3539 SvREFCNT_dec(GvHV(gv));
3540 hv_name_set(PL_defstash, "main", 4, 0);
3541 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3543 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3545 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3546 GvMULTI_on(PL_incgv);
3547 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3548 GvMULTI_on(PL_hintgv);
3549 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3550 SvREFCNT_inc_simple_void(PL_defgv);
3551 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3552 SvREFCNT_inc_simple_void(PL_errgv);
3553 GvMULTI_on(PL_errgv);
3554 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3555 GvMULTI_on(PL_replgv);
3556 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3557 #ifdef PERL_DONT_CREATE_GVSV
3560 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3562 PL_curstash = PL_defstash;
3563 CopSTASH_set(&PL_compiling, PL_defstash);
3564 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3565 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3567 /* We must init $/ before switches are processed. */
3568 sv_setpvs(get_sv("/", GV_ADD), "\n");
3572 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3573 bool *suidscript, PerlIO **rsfpp)
3578 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3581 PL_origfilename = savepvs("-e");
3584 /* if find_script() returns, it returns a malloc()-ed value */
3585 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3587 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3588 const char *s = scriptname + 8;
3594 * Tell apart "normal" usage of fdscript, e.g.
3595 * with bash on FreeBSD:
3596 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3597 * from usage in suidperl.
3598 * Does any "normal" usage leave garbage after the number???
3599 * Is it a mistake to use a similar /dev/fd/ construct for
3604 * Be supersafe and do some sanity-checks.
3605 * Still, can we be sure we got the right thing?
3608 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3611 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3613 scriptname = savepv(s + 1);
3614 Safefree(PL_origfilename);
3615 PL_origfilename = (char *)scriptname;
3620 CopFILE_free(PL_curcop);
3621 CopFILE_set(PL_curcop, PL_origfilename);
3622 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3623 scriptname = (char *)"";
3624 if (fdscript >= 0) {
3625 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3626 # if defined(HAS_FCNTL) && defined(F_SETFD)
3628 /* ensure close-on-exec */
3629 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3632 else if (!*scriptname) {
3633 forbid_setid(0, *suidscript);
3634 *rsfpp = PerlIO_stdin();
3637 #ifdef FAKE_BIT_BUCKET
3638 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3639 * is called) and still have the "-e" work. (Believe it or not,
3640 * a /dev/null is required for the "-e" to work because source
3641 * filter magic is used to implement it. ) This is *not* a general
3642 * replacement for a /dev/null. What we do here is create a temp
3643 * file (an empty file), open up that as the script, and then
3644 * immediately close and unlink it. Close enough for jazz. */
3645 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3646 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3647 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3648 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3649 FAKE_BIT_BUCKET_TEMPLATE
3651 const char * const err = "Failed to create a fake bit bucket";
3652 if (strEQ(scriptname, BIT_BUCKET)) {
3653 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3654 int tmpfd = mkstemp(tmpname);
3656 scriptname = tmpname;
3659 Perl_croak(aTHX_ err);
3662 scriptname = mktemp(tmpname);
3664 Perl_croak(aTHX_ err);
3669 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3670 #ifdef FAKE_BIT_BUCKET
3671 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3672 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3673 && strlen(scriptname) == sizeof(tmpname) - 1) {
3676 scriptname = BIT_BUCKET;
3678 # if defined(HAS_FCNTL) && defined(F_SETFD)
3680 /* ensure close-on-exec */
3681 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3685 /* PSz 16 Sep 03 Keep neat error message */
3687 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3689 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3690 CopFILE(PL_curcop), Strerror(errno));
3696 * I_SYSSTATVFS HAS_FSTATVFS
3698 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3699 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3700 * here so that metaconfig picks them up. */
3703 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3704 /* Don't even need this function. */
3707 S_validate_suid(pTHX_ PerlIO *rsfp)
3709 PERL_ARGS_ASSERT_VALIDATE_SUID;
3711 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3714 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3715 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3717 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3720 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3721 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3722 /* not set-id, must be wrapped */
3725 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3728 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3732 register const char *s2;
3734 PERL_ARGS_ASSERT_FIND_BEGINNING;
3736 /* skip forward in input to the real script? */
3739 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3740 Perl_croak(aTHX_ "No Perl script found in input\n");
3742 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3743 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3744 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3746 while (*s == ' ' || *s == '\t') s++;
3748 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3749 || s2[-1] == '_') s2--;
3750 if (strnEQ(s2-4,"perl",4))
3751 while ((s = moreswitches(s)))
3761 PL_uid = PerlProc_getuid();
3762 PL_euid = PerlProc_geteuid();
3763 PL_gid = PerlProc_getgid();
3764 PL_egid = PerlProc_getegid();
3766 PL_uid |= PL_gid << 16;
3767 PL_euid |= PL_egid << 16;
3769 /* Should not happen: */
3770 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3771 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3774 * Should go by suidscript, not uid!=euid: why disallow
3775 * system("ls") in scripts run from setuid things?
3776 * Or, is this run before we check arguments and set suidscript?
3777 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3778 * (We never have suidscript, can we be sure to have fdscript?)
3779 * Or must then go by UID checks? See comments in forbid_setid also.
3783 /* This is used very early in the lifetime of the program,
3784 * before even the options are parsed, so PL_tainting has
3785 * not been initialized properly. */
3787 Perl_doing_taint(int argc, char *argv[], char *envp[])
3789 #ifndef PERL_IMPLICIT_SYS
3790 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3791 * before we have an interpreter-- and the whole point of this
3792 * function is to be called at such an early stage. If you are on
3793 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3794 * "tainted because running with altered effective ids', you'll
3795 * have to add your own checks somewhere in here. The two most
3796 * known samples of 'implicitness' are Win32 and NetWare, neither
3797 * of which has much of concept of 'uids'. */
3798 int uid = PerlProc_getuid();
3799 int euid = PerlProc_geteuid();
3800 int gid = PerlProc_getgid();
3801 int egid = PerlProc_getegid();
3808 if (uid && (euid != uid || egid != gid))
3810 #endif /* !PERL_IMPLICIT_SYS */
3811 /* This is a really primitive check; environment gets ignored only
3812 * if -T are the first chars together; otherwise one gets
3813 * "Too late" message. */
3814 if ( argc > 1 && argv[1][0] == '-'
3815 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3820 /* Passing the flag as a single char rather than a string is a slight space
3821 optimisation. The only message that isn't /^-.$/ is
3822 "program input from stdin", which is substituted in place of '\0', which
3823 could never be a command line flag. */
3825 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3828 char string[3] = "-x";
3829 const char *message = "program input from stdin";
3836 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3837 if (PL_euid != PL_uid)
3838 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3839 if (PL_egid != PL_gid)
3840 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3841 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3843 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3847 Perl_init_dbargs(pTHX)
3849 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3854 /* Someone has already created it.
3855 It might have entries, and if we just turn off AvREAL(), they will
3856 "leak" until global destruction. */
3859 AvREIFY_only(PL_dbargs);
3863 Perl_init_debugger(pTHX)
3866 HV * const ostash = PL_curstash;
3868 PL_curstash = PL_debstash;
3870 Perl_init_dbargs(aTHX);
3871 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3872 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3873 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3874 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3875 if (!SvIOK(PL_DBsingle))
3876 sv_setiv(PL_DBsingle, 0);
3877 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3878 if (!SvIOK(PL_DBtrace))
3879 sv_setiv(PL_DBtrace, 0);
3880 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3881 if (!SvIOK(PL_DBsignal))
3882 sv_setiv(PL_DBsignal, 0);
3883 PL_curstash = ostash;
3886 #ifndef STRESS_REALLOC
3887 #define REASONABLE(size) (size)
3889 #define REASONABLE(size) (1) /* unreasonable */
3893 Perl_init_stacks(pTHX)
3896 /* start with 128-item stack and 8K cxstack */
3897 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3898 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3899 PL_curstackinfo->si_type = PERLSI_MAIN;
3900 PL_curstack = PL_curstackinfo->si_stack;
3901 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3903 PL_stack_base = AvARRAY(PL_curstack);
3904 PL_stack_sp = PL_stack_base;
3905 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3907 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3910 PL_tmps_max = REASONABLE(128);
3912 Newx(PL_markstack,REASONABLE(32),I32);
3913 PL_markstack_ptr = PL_markstack;
3914 PL_markstack_max = PL_markstack + REASONABLE(32);
3918 Newx(PL_scopestack,REASONABLE(32),I32);
3920 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3922 PL_scopestack_ix = 0;
3923 PL_scopestack_max = REASONABLE(32);
3925 Newx(PL_savestack,REASONABLE(128),ANY);
3926 PL_savestack_ix = 0;
3927 PL_savestack_max = REASONABLE(128);
3936 while (PL_curstackinfo->si_next)
3937 PL_curstackinfo = PL_curstackinfo->si_next;
3938 while (PL_curstackinfo) {
3939 PERL_SI *p = PL_curstackinfo->si_prev;
3940 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3941 Safefree(PL_curstackinfo->si_cxstack);
3942 Safefree(PL_curstackinfo);
3943 PL_curstackinfo = p;
3945 Safefree(PL_tmps_stack);
3946 Safefree(PL_markstack);
3947 Safefree(PL_scopestack);
3949 Safefree(PL_scopestack_name);
3951 Safefree(PL_savestack);
3955 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
3957 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
3958 AV *const isa = GvAVn(gv);
3961 PERL_ARGS_ASSERT_POPULATE_ISA;
3963 if(AvFILLp(isa) != -1)
3966 /* NOTE: No support for tied ISA */
3968 va_start(args, len);
3970 const char *const parent = va_arg(args, const char*);
3975 parent_len = va_arg(args, size_t);
3977 /* Arguments are supplied with a trailing :: */
3978 assert(parent_len > 2);
3979 assert(parent[parent_len - 1] == ':');
3980 assert(parent[parent_len - 2] == ':');
3981 av_push(isa, newSVpvn(parent, parent_len - 2));
3982 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
3989 S_init_predump_symbols(pTHX)
3995 sv_setpvs(get_sv("\"", GV_ADD), " ");
3996 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3999 /* Historically, PVIOs were blessed into IO::Handle, unless
4000 FileHandle was loaded, in which case they were blessed into
4001 that. Action at a distance.
4002 However, if we simply bless into IO::Handle, we break code
4003 that assumes that PVIOs will have (among others) a seek
4004 method. IO::File inherits from IO::Handle and IO::Seekable,
4005 and provides the needed methods. But if we simply bless into
4006 it, then we break code that assumed that by loading
4007 IO::Handle, *it* would work.
4008 So a compromise is to set up the correct @IO::File::ISA,
4009 so that code that does C<use IO::Handle>; will still work.
4012 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4013 STR_WITH_LEN("IO::Handle::"),
4014 STR_WITH_LEN("IO::Seekable::"),
4015 STR_WITH_LEN("Exporter::"),
4018 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4019 GvMULTI_on(PL_stdingv);
4020 io = GvIOp(PL_stdingv);
4021 IoTYPE(io) = IoTYPE_RDONLY;
4022 IoIFP(io) = PerlIO_stdin();
4023 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4025 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4027 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4030 IoTYPE(io) = IoTYPE_WRONLY;
4031 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4033 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4035 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4037 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4038 GvMULTI_on(PL_stderrgv);
4039 io = GvIOp(PL_stderrgv);
4040 IoTYPE(io) = IoTYPE_WRONLY;
4041 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4042 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4044 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4046 PL_statname = newSV(0); /* last filename we did stat on */
4050 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4054 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4056 argc--,argv++; /* skip name of script */
4057 if (PL_doswitches) {
4058 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4062 if (argv[0][1] == '-' && !argv[0][2]) {
4066 if ((s = strchr(argv[0], '='))) {
4067 const char *const start_name = argv[0] + 1;
4068 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4069 TRUE, SVt_PV)), s + 1);
4072 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4075 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4076 GvMULTI_on(PL_argvgv);
4077 (void)gv_AVadd(PL_argvgv);
4078 av_clear(GvAVn(PL_argvgv));
4079 for (; argc > 0; argc--,argv++) {
4080 SV * const sv = newSVpv(argv[0],0);
4081 av_push(GvAVn(PL_argvgv),sv);
4082 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4083 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4086 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4087 (void)sv_utf8_decode(sv);
4093 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4098 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4100 PL_toptarget = newSV_type(SVt_PVFM);
4101 sv_setpvs(PL_toptarget, "");
4102 PL_bodytarget = newSV_type(SVt_PVFM);
4103 sv_setpvs(PL_bodytarget, "");
4104 PL_formtarget = PL_bodytarget;
4108 init_argv_symbols(argc,argv);
4110 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4111 sv_setpv(GvSV(tmpgv),PL_origfilename);
4113 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4115 bool env_is_not_environ;
4116 GvMULTI_on(PL_envgv);
4117 hv = GvHVn(PL_envgv);
4118 hv_magic(hv, NULL, PERL_MAGIC_env);
4120 #ifdef USE_ENVIRON_ARRAY
4121 /* Note that if the supplied env parameter is actually a copy
4122 of the global environ then it may now point to free'd memory
4123 if the environment has been modified since. To avoid this
4124 problem we treat env==NULL as meaning 'use the default'
4128 env_is_not_environ = env != environ;
4129 if (env_is_not_environ
4130 # ifdef USE_ITHREADS
4131 && PL_curinterp == aTHX
4140 for (; *env; env++) {
4143 if (!(s = strchr(old_var,'=')) || s == old_var)
4146 #if defined(MSDOS) && !defined(DJGPP)
4148 (void)strupr(old_var);
4151 sv = newSVpv(s+1, 0);
4152 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4153 if (env_is_not_environ)
4157 #endif /* USE_ENVIRON_ARRAY */
4158 #endif /* !PERL_MICRO */
4161 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4162 SvREADONLY_off(GvSV(tmpgv));
4163 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4164 SvREADONLY_on(GvSV(tmpgv));
4166 #ifdef THREADS_HAVE_PIDS
4167 PL_ppid = (IV)getppid();
4170 /* touch @F array to prevent spurious warnings 20020415 MJD */
4172 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4177 S_init_perllib(pTHX)
4181 const char *perl5lib = NULL;
4184 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4190 perl5lib = PerlEnv_getenv("PERL5LIB");
4192 * It isn't possible to delete an environment variable with
4193 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4194 * case we treat PERL5LIB as undefined if it has a zero-length value.
4196 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4197 if (perl5lib && *perl5lib != '\0')
4201 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4203 s = PerlEnv_getenv("PERLLIB");
4205 incpush_use_sep(s, 0, 0);
4208 /* Treat PERL5?LIB as a possible search list logical name -- the
4209 * "natural" VMS idiom for a Unix path string. We allow each
4210 * element to be a set of |-separated directories for compatibility.
4214 if (my_trnlnm("PERL5LIB",buf,0))
4216 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4217 } while (my_trnlnm("PERL5LIB",buf,++idx));
4219 while (my_trnlnm("PERLLIB",buf,idx++))
4220 incpush_use_sep(buf, 0, 0);
4225 #ifndef PERL_IS_MINIPERL
4226 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4227 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4229 /* Use the ~-expanded versions of APPLLIB (undocumented),
4230 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4233 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4234 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4238 /* sitearch is always relative to sitelib on Windows for
4239 * DLL-based path intuition to work correctly */
4240 # if !defined(WIN32)
4241 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4242 INCPUSH_CAN_RELOCATE);
4248 /* this picks up sitearch as well */
4249 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4251 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4253 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4257 #ifdef PERL_VENDORARCH_EXP
4258 /* vendorarch is always relative to vendorlib on Windows for
4259 * DLL-based path intuition to work correctly */
4260 # if !defined(WIN32)
4261 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4262 INCPUSH_CAN_RELOCATE);
4266 #ifdef PERL_VENDORLIB_EXP
4268 /* this picks up vendorarch as well */
4269 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4271 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4273 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4274 INCPUSH_CAN_RELOCATE);
4279 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4283 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4287 s = win32_get_privlib(PERL_FS_VERSION, &len);
4289 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4292 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4294 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4298 #ifdef PERL_OTHERLIBDIRS
4299 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4300 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4301 |INCPUSH_CAN_RELOCATE);
4307 * It isn't possible to delete an environment variable with
4308 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4309 * case we treat PERL5LIB as undefined if it has a zero-length value.
4311 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4312 if (perl5lib && *perl5lib != '\0')
4316 incpush_use_sep(perl5lib, 0,
4317 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4319 /* Treat PERL5?LIB as a possible search list logical name -- the
4320 * "natural" VMS idiom for a Unix path string. We allow each
4321 * element to be a set of |-separated directories for compatibility.
4325 if (my_trnlnm("PERL5LIB",buf,0))
4327 incpush_use_sep(buf, 0,
4328 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4329 } while (my_trnlnm("PERL5LIB",buf,++idx));
4333 /* Use the ~-expanded versions of APPLLIB (undocumented),
4334 SITELIB and VENDORLIB for older versions
4337 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4338 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4341 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4342 /* Search for version-specific dirs below here */
4343 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4344 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4348 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4349 /* Search for version-specific dirs below here */
4350 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4351 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4354 #ifdef PERL_OTHERLIBDIRS
4355 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4356 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4357 |INCPUSH_CAN_RELOCATE);
4359 #endif /* !PERL_IS_MINIPERL */
4362 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4365 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4366 # define PERLLIB_SEP ';'
4369 # define PERLLIB_SEP '|'
4371 # define PERLLIB_SEP ':'
4374 #ifndef PERLLIB_MANGLE
4375 # define PERLLIB_MANGLE(s,n) (s)
4378 #ifndef PERL_IS_MINIPERL
4379 /* Push a directory onto @INC if it exists.
4380 Generate a new SV if we do this, to save needing to copy the SV we push
4383 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4388 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4390 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4391 S_ISDIR(tmpstatbuf.st_mode)) {
4393 dir = newSVsv(stem);
4395 /* Truncate dir back to stem. */
4396 SvCUR_set(dir, SvCUR(stem));
4403 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4405 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4408 PERL_ARGS_ASSERT_MAYBERELOCATE;
4412 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4413 defined to so something (in os2/os2.c), but the code has been
4414 this way, ignoring any possible changed of length, since
4415 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4417 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4419 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4426 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4428 while (unix[len-1] == '/') len--; /* Cosmetic */
4429 sv_usepvn(libdir,unix,len);
4432 PerlIO_printf(Perl_error_log,
4433 "Failed to unixify @INC element \"%s\"\n",
4434 SvPV_nolen_const(libdir));
4438 /* Do the if() outside the #ifdef to avoid warnings about an unused
4441 #ifdef PERL_RELOCATABLE_INC
4443 * Relocatable include entries are marked with a leading .../
4446 * 0: Remove that leading ".../"
4447 * 1: Remove trailing executable name (anything after the last '/')
4448 * from the perl path to give a perl prefix
4450 * While the @INC element starts "../" and the prefix ends with a real
4451 * directory (ie not . or ..) chop that real directory off the prefix
4452 * and the leading "../" from the @INC element. ie a logical "../"
4454 * Finally concatenate the prefix and the remainder of the @INC element
4455 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4456 * generates /usr/local/lib/perl5
4458 const char *libpath = SvPVX(libdir);
4459 STRLEN libpath_len = SvCUR(libdir);
4460 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4462 SV * const caret_X = get_sv("\030", 0);
4463 /* Going to use the SV just as a scratch buffer holding a C
4469 /* $^X is *the* source of taint if tainting is on, hence
4470 SvPOK() won't be true. */
4472 assert(SvPOKp(caret_X));
4473 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4475 /* Firstly take off the leading .../
4476 If all else fail we'll do the paths relative to the current
4478 sv_chop(libdir, libpath + 4);
4479 /* Don't use SvPV as we're intentionally bypassing taining,
4480 mortal copies that the mg_get of tainting creates, and
4481 corruption that seems to come via the save stack.
4482 I guess that the save stack isn't correctly set up yet. */
4483 libpath = SvPVX(libdir);
4484 libpath_len = SvCUR(libdir);
4486 /* This would work more efficiently with memrchr, but as it's
4487 only a GNU extension we'd need to probe for it and
4488 implement our own. Not hard, but maybe not worth it? */
4490 prefix = SvPVX(prefix_sv);
4491 lastslash = strrchr(prefix, '/');
4493 /* First time in with the *lastslash = '\0' we just wipe off
4494 the trailing /perl from (say) /usr/foo/bin/perl
4498 while ((*lastslash = '\0'), /* Do that, come what may. */
4499 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4500 && (lastslash = strrchr(prefix, '/')))) {
4501 if (lastslash[1] == '\0'
4502 || (lastslash[1] == '.'
4503 && (lastslash[2] == '/' /* ends "/." */
4504 || (lastslash[2] == '/'
4505 && lastslash[3] == '/' /* or "/.." */
4507 /* Prefix ends "/" or "/." or "/..", any of which
4508 are fishy, so don't do any more logical cleanup.
4512 /* Remove leading "../" from path */
4515 /* Next iteration round the loop removes the last
4516 directory name from prefix by writing a '\0' in
4517 the while clause. */
4519 /* prefix has been terminated with a '\0' to the correct
4520 length. libpath points somewhere into the libdir SV.
4521 We need to join the 2 with '/' and drop the result into
4523 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4524 SvREFCNT_dec(libdir);
4525 /* And this is the new libdir. */
4528 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4529 /* Need to taint relocated paths if running set ID */
4530 SvTAINTED_on(libdir);
4533 SvREFCNT_dec(prefix_sv);
4542 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4545 #ifndef PERL_IS_MINIPERL
4546 const U8 using_sub_dirs
4547 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4548 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4549 const U8 add_versioned_sub_dirs
4550 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4551 const U8 add_archonly_sub_dirs
4552 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4553 #ifdef PERL_INC_VERSION_LIST
4554 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4557 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4558 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4559 AV *const inc = GvAVn(PL_incgv);
4561 PERL_ARGS_ASSERT_INCPUSH;
4564 /* Could remove this vestigial extra block, if we don't mind a lot of
4565 re-indenting diff noise. */
4568 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4569 arranged to unshift #! line -I onto the front of @INC. However,
4570 -I can add version and architecture specific libraries, and they
4571 need to go first. The old code assumed that it was always
4572 pushing. Hence to make it work, need to push the architecture
4573 (etc) libraries onto a temporary array, then "unshift" that onto
4574 the front of @INC. */
4575 #ifndef PERL_IS_MINIPERL
4576 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4579 libdir = mayberelocate(dir, len, flags);
4581 #ifndef PERL_IS_MINIPERL
4583 * BEFORE pushing libdir onto @INC we may first push version- and
4584 * archname-specific sub-directories.
4586 if (using_sub_dirs) {
4588 #ifdef PERL_INC_VERSION_LIST
4589 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4590 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4591 const char * const *incver;
4593 subdir = newSVsv(libdir);
4595 if (add_versioned_sub_dirs) {
4596 /* .../version/archname if -d .../version/archname */
4597 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4598 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4600 /* .../version if -d .../version */
4601 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4602 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4605 #ifdef PERL_INC_VERSION_LIST
4607 for (incver = incverlist; *incver; incver++) {
4608 /* .../xxx if -d .../xxx */
4609 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4610 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4615 if (add_archonly_sub_dirs) {
4616 /* .../archname if -d .../archname */
4617 sv_catpvs(subdir, "/" ARCHNAME);
4618 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4622 assert (SvREFCNT(subdir) == 1);
4623 SvREFCNT_dec(subdir);
4625 #endif /* !PERL_IS_MINIPERL */
4626 /* finally add this lib directory at the end of @INC */
4628 #ifdef PERL_IS_MINIPERL
4629 const U32 extra = 0;
4631 U32 extra = av_len(av) + 1;
4633 av_unshift(inc, extra + push_basedir);
4635 av_store(inc, extra, libdir);
4636 #ifndef PERL_IS_MINIPERL
4638 /* av owns a reference, av_store() expects to be donated a
4639 reference, and av expects to be sane when it's cleared.
4640 If I wanted to be naughty and wrong, I could peek inside the
4641 implementation of av_clear(), realise that it uses
4642 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4643 and so directly steal from it (with a memcpy() to inc, and
4644 then memset() to NULL them out. But people copy code from the
4645 core expecting it to be best practise, so let's use the API.
4646 Although studious readers will note that I'm not checking any
4648 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4653 else if (push_basedir) {
4654 av_push(inc, libdir);
4657 if (!push_basedir) {
4658 assert (SvREFCNT(libdir) == 1);
4659 SvREFCNT_dec(libdir);
4665 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4669 /* This logic has been broken out from S_incpush(). It may be possible to
4672 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4674 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4675 * argument to incpush_use_sep. This allows creation of relocatable
4676 * Perl distributions that patch the binary at install time. Those
4677 * distributions will have to provide their own relocation tools; this
4678 * is not a feature otherwise supported by core Perl.
4680 #ifndef PERL_RELOCATABLE_INCPUSH
4687 /* Break at all separators */
4688 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4690 /* skip any consecutive separators */
4692 /* Uncomment the next line for PATH semantics */
4693 /* But you'll need to write tests */
4694 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4696 incpush(p, (STRLEN)(s - p), flags);
4701 incpush(p, (STRLEN)(end - p), flags);
4706 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4710 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4716 PERL_ARGS_ASSERT_CALL_LIST;
4718 while (av_len(paramList) >= 0) {
4719 cv = MUTABLE_CV(av_shift(paramList));
4721 if (paramList == PL_beginav) {
4722 /* save PL_beginav for compiler */
4723 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4725 else if (paramList == PL_checkav) {
4726 /* save PL_checkav for compiler */
4727 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4729 else if (paramList == PL_unitcheckav) {
4730 /* save PL_unitcheckav for compiler */
4731 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4742 PL_madskills |= 16384;
4747 PL_madskills &= ~16384;
4750 (void)SvPV_const(atsv, len);
4752 PL_curcop = &PL_compiling;
4753 CopLINE_set(PL_curcop, oldline);
4754 if (paramList == PL_beginav)
4755 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4757 Perl_sv_catpvf(aTHX_ atsv,
4758 "%s failed--call queue aborted",
4759 paramList == PL_checkav ? "CHECK"
4760 : paramList == PL_initav ? "INIT"
4761 : paramList == PL_unitcheckav ? "UNITCHECK"
4763 while (PL_scopestack_ix > oldscope)
4766 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4773 /* my_exit() was called */
4774 while (PL_scopestack_ix > oldscope)
4777 PL_curstash = PL_defstash;
4778 PL_curcop = &PL_compiling;
4779 CopLINE_set(PL_curcop, oldline);
4785 PL_curcop = &PL_compiling;
4786 CopLINE_set(PL_curcop, oldline);
4789 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4798 Perl_my_exit(pTHX_ U32 status)
4809 STATUS_EXIT_SET(status);
4816 Perl_my_failure_exit(pTHX)
4820 /* We have been called to fall on our sword. The desired exit code
4821 * should be already set in STATUS_UNIX, but could be shifted over
4822 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4825 * If an error code has not been set, then force the issue.
4827 if (MY_POSIX_EXIT) {
4829 /* According to the die_exit.t tests, if errno is non-zero */
4830 /* It should be used for the error status. */
4832 if (errno == EVMSERR) {
4833 STATUS_NATIVE = vaxc$errno;
4836 /* According to die_exit.t tests, if the child_exit code is */
4837 /* also zero, then we need to exit with a code of 255 */
4838 if ((errno != 0) && (errno < 256))
4839 STATUS_UNIX_EXIT_SET(errno);
4840 else if (STATUS_UNIX < 255) {
4841 STATUS_UNIX_EXIT_SET(255);
4846 /* The exit code could have been set by $? or vmsish which
4847 * means that it may not have fatal set. So convert
4848 * success/warning codes to fatal with out changing
4849 * the POSIX status code. The severity makes VMS native
4850 * status handling work, while UNIX mode programs use the
4851 * the POSIX exit codes.
4853 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4854 STATUS_NATIVE &= STS$M_COND_ID;
4855 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4859 /* Traditionally Perl on VMS always expects a Fatal Error. */
4860 if (vaxc$errno & 1) {
4862 /* So force success status to failure */
4863 if (STATUS_NATIVE & 1)
4868 STATUS_UNIX = EINTR; /* In case something cares */
4873 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4875 /* Encode the severity code */
4876 severity = STATUS_NATIVE & STS$M_SEVERITY;
4877 STATUS_UNIX = (severity ? severity : 1) << 8;
4879 /* Perl expects this to be a fatal error */
4880 if (severity != STS$K_SEVERE)
4889 STATUS_UNIX_SET(errno);
4891 exitstatus = STATUS_UNIX >> 8;
4892 if (exitstatus & 255)
4893 STATUS_UNIX_SET(exitstatus);
4895 STATUS_UNIX_SET(255);
4902 S_my_exit_jump(pTHX)
4907 SvREFCNT_dec(PL_e_script);
4911 POPSTACK_TO(PL_mainstack);
4919 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4922 const char * const p = SvPVX_const(PL_e_script);
4923 const char *nl = strchr(p, '\n');
4925 PERL_UNUSED_ARG(idx);
4926 PERL_UNUSED_ARG(maxlen);
4928 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4930 filter_del(read_e_script);
4933 sv_catpvn(buf_sv, p, nl-p);
4934 sv_chop(PL_e_script, nl);
4940 * c-indentation-style: bsd
4942 * indent-tabs-mode: t
4945 * ex: set ts=8 sts=4 sw=4 noet: