3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
26 #define PERL_IN_PERL_C
28 #include "patchlevel.h" /* for local_patches */
35 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
40 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
42 # include <sys/wait.h>
50 char control[CMSG_SPACE(sizeof(int))];
67 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
68 char *getenv (char *); /* Usually in <stdlib.h> */
71 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
73 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
74 /* Drop everything. Heck, don't even try to call it */
75 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
77 /* Drop almost everything */
78 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
81 #define CALL_BODY_EVAL(myop) \
82 if (PL_op == (myop)) \
83 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
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);
111 #ifdef PERL_IMPLICIT_CONTEXT
112 MUTEX_INIT(&PL_my_ctx_mutex);
115 #if defined(USE_ITHREADS)
118 /* This always happens for non-ithreads */
121 PERL_SET_THX(my_perl);
126 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
129 Perl_sys_init(int* argc, char*** argv)
133 PERL_ARGS_ASSERT_SYS_INIT;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_SYS_INIT_BODY(argc, argv);
141 Perl_sys_init3(int* argc, char*** argv, char*** env)
145 PERL_ARGS_ASSERT_SYS_INIT3;
147 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
148 PERL_UNUSED_ARG(argv);
149 PERL_UNUSED_ARG(env);
150 PERL_SYS_INIT3_BODY(argc, argv, env);
157 if (!PL_veto_cleanup) {
158 PERL_SYS_TERM_BODY();
163 #ifdef PERL_IMPLICIT_SYS
165 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
166 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
167 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
168 struct IPerlDir* ipD, struct IPerlSock* ipS,
169 struct IPerlProc* ipP)
171 PerlInterpreter *my_perl;
173 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
175 /* Newx() needs interpreter, so call malloc() instead */
176 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
177 S_init_tls_and_interp(my_perl);
178 Zero(my_perl, 1, PerlInterpreter);
188 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 #ifndef PERL_TRACK_MEMPOOL
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 Zero(my_perl, 1, PerlInterpreter);
217 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
221 #endif /* PERL_IMPLICIT_SYS */
224 =for apidoc perl_construct
226 Initializes a new Perl interpreter. See L<perlembed>.
232 perl_construct(pTHXx)
236 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
240 PL_perl_destruct_level = 1;
242 PERL_UNUSED_ARG(my_perl);
243 if (PL_perl_destruct_level > 0)
246 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
248 /* set read-only and try to insure than we wont see REFCNT==0
251 SvREADONLY_on(&PL_sv_undef);
252 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_no,PL_No);
255 /* value lookup in void context - happens to have the side effect
256 of caching the numeric forms. However, as &PL_sv_no doesn't contain
257 a string that is a valid numer, we have to turn the public flags by
263 SvREADONLY_on(&PL_sv_no);
264 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
266 sv_setpv(&PL_sv_yes,PL_Yes);
269 SvREADONLY_on(&PL_sv_yes);
270 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
272 SvREADONLY_on(&PL_sv_placeholder);
273 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
275 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
276 #ifdef PERL_USES_PL_PIDSTATUS
277 PL_pidstatus = newHV();
280 PL_rs = newSVpvs("\n");
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
306 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
307 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
314 #ifdef USE_REENTRANT_API
315 Perl_reentrant_init(aTHX);
318 /* Note that strtab is a rather special HV. Assumptions are made
319 about not iterating on it, and not adding tie magic to it.
320 It is properly deallocated in perl_destruct() */
323 HvSHAREKEYS_off(PL_strtab); /* mandatory */
324 hv_ksplit(PL_strtab, 512);
326 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
327 _dyld_lookup_and_bind
328 ("__environ", (unsigned long *) &environ_pointer, NULL);
332 # ifdef USE_ENVIRON_ARRAY
333 PL_origenviron = environ;
337 /* Use sysconf(_SC_CLK_TCK) if available, if not
338 * available or if the sysconf() fails, use the HZ.
339 * BeOS has those, but returns the wrong value.
340 * The HZ if not originally defined has been by now
341 * been defined as CLK_TCK, if available. */
342 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
343 PL_clocktick = sysconf(_SC_CLK_TCK);
344 if (PL_clocktick <= 0)
348 PL_stashcache = newHV();
350 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
394 PL_registered_mros = newHV();
395 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
396 HvMAX(PL_registered_mros) = 0;
402 =for apidoc nothreadhook
404 Stub that provides thread hook for perl_destruct when there are
411 Perl_nothreadhook(pTHX)
417 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
419 Perl_dump_sv_child(pTHX_ SV *sv)
422 const int sock = PL_dumper_fd;
423 const int debug_fd = PerlIO_fileno(Perl_debug_log);
424 union control_un control;
427 struct cmsghdr *cmptr;
429 unsigned char buffer[256];
431 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
433 if(sock == -1 || debug_fd == -1)
436 PerlIO_flush(Perl_debug_log);
438 /* All these shenanigans are to pass a file descriptor over to our child for
439 it to dump out to. We can't let it hold open the file descriptor when it
440 forks, as the file descriptor it will dump to can turn out to be one end
441 of pipe that some other process will wait on for EOF. (So as it would
442 be open, the wait would be forever.) */
444 msg.msg_control = control.control;
445 msg.msg_controllen = sizeof(control.control);
446 /* We're a connected socket so we don't need a destination */
452 cmptr = CMSG_FIRSTHDR(&msg);
453 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
454 cmptr->cmsg_level = SOL_SOCKET;
455 cmptr->cmsg_type = SCM_RIGHTS;
456 *((int *)CMSG_DATA(cmptr)) = 1;
458 vec[0].iov_base = (void*)&sv;
459 vec[0].iov_len = sizeof(sv);
460 got = sendmsg(sock, &msg, 0);
463 perror("Debug leaking scalars parent sendmsg failed");
466 if(got < sizeof(sv)) {
467 perror("Debug leaking scalars parent short sendmsg");
471 /* Return protocol is
473 unsigned char: length of location string (0 for empty)
474 unsigned char*: string (not terminated)
476 vec[0].iov_base = (void*)&returned_errno;
477 vec[0].iov_len = sizeof(returned_errno);
478 vec[1].iov_base = buffer;
481 got = readv(sock, vec, 2);
484 perror("Debug leaking scalars parent read failed");
485 PerlIO_flush(PerlIO_stderr());
488 if(got < sizeof(returned_errno) + 1) {
489 perror("Debug leaking scalars parent short read");
490 PerlIO_flush(PerlIO_stderr());
495 got = read(sock, buffer + 1, *buffer);
497 perror("Debug leaking scalars parent read 2 failed");
498 PerlIO_flush(PerlIO_stderr());
503 perror("Debug leaking scalars parent short read 2");
504 PerlIO_flush(PerlIO_stderr());
509 if (returned_errno || *buffer) {
510 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
511 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
512 returned_errno, strerror(returned_errno));
518 =for apidoc perl_destruct
520 Shuts down a Perl interpreter. See L<perlembed>.
529 VOL signed char destruct_level; /* see possible values in intrpvar.h */
531 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
535 PERL_ARGS_ASSERT_PERL_DESTRUCT;
537 PERL_UNUSED_ARG(my_perl);
540 /* wait for all pseudo-forked children to finish */
541 PERL_WAIT_FOR_CHILDREN;
543 destruct_level = PL_perl_destruct_level;
546 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
548 const int i = atoi(s);
549 if (destruct_level < i)
555 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
561 if (PL_endav && !PL_minus_c)
562 call_list(PL_scopestack_ix, PL_endav);
568 /* Need to flush since END blocks can produce output */
571 if (CALL_FPTR(PL_threadhook)(aTHX)) {
572 /* Threads hook has vetoed further cleanup */
573 PL_veto_cleanup = TRUE;
577 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
578 if (destruct_level != 0) {
579 /* Fork here to create a child. Our child's job is to preserve the
580 state of scalars prior to destruction, so that we can instruct it
581 to dump any scalars that we later find have leaked.
582 There's no subtlety in this code - it assumes POSIX, and it doesn't
586 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
587 perror("Debug leaking scalars socketpair failed");
593 perror("Debug leaking scalars fork failed");
597 /* We are the child */
598 const int sock = fd[1];
599 const int debug_fd = PerlIO_fileno(Perl_debug_log);
602 /* Our success message is an integer 0, and a char 0 */
603 static const char success[sizeof(int) + 1] = {0};
607 /* We need to close all other file descriptors otherwise we end up
608 with interesting hangs, where the parent closes its end of a
609 pipe, and sits waiting for (another) child to terminate. Only
610 that child never terminates, because it never gets EOF, because
611 we also have the far end of the pipe open. We even need to
612 close the debugging fd, because sometimes it happens to be one
613 end of a pipe, and a process is waiting on the other end for
614 EOF. Normally it would be closed at some point earlier in
615 destruction, but if we happen to cause the pipe to remain open,
616 EOF never occurs, and we get an infinite hang. Hence all the
617 games to pass in a file descriptor if it's actually needed. */
619 f = sysconf(_SC_OPEN_MAX);
621 where = "sysconf failed";
632 union control_un control;
635 struct cmsghdr *cmptr;
639 msg.msg_control = control.control;
640 msg.msg_controllen = sizeof(control.control);
641 /* We're a connected socket so we don't need a source */
645 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
647 vec[0].iov_base = (void*)⌖
648 vec[0].iov_len = sizeof(target);
650 got = recvmsg(sock, &msg, 0);
655 where = "recv failed";
658 if(got < sizeof(target)) {
659 where = "short recv";
663 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
667 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
668 where = "wrong cmsg_len";
671 if(cmptr->cmsg_level != SOL_SOCKET) {
672 where = "wrong cmsg_level";
675 if(cmptr->cmsg_type != SCM_RIGHTS) {
676 where = "wrong cmsg_type";
680 got_fd = *(int*)CMSG_DATA(cmptr);
681 /* For our last little bit of trickery, put the file descriptor
682 back into Perl_debug_log, as if we never actually closed it
684 if(got_fd != debug_fd) {
685 if (dup2(got_fd, debug_fd) == -1) {
692 PerlIO_flush(Perl_debug_log);
694 got = write(sock, &success, sizeof(success));
697 where = "write failed";
700 if(got < sizeof(success)) {
701 where = "short write";
708 int send_errno = errno;
709 unsigned char length = (unsigned char) strlen(where);
710 struct iovec failure[3] = {
711 {(void*)&send_errno, sizeof(send_errno)},
713 {(void*)where, length}
715 int got = writev(sock, failure, 3);
716 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
717 in the parent if we try to read from the socketpair after the
718 child has exited, even if there was data to read.
719 So sleep a bit to give the parent a fighting chance of
722 _exit((got == -1) ? errno : 0);
726 PL_dumper_fd = fd[0];
731 /* We must account for everything. */
733 /* Destroy the main CV and syntax tree */
734 /* Do this now, because destroying ops can cause new SVs to be generated
735 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
736 PL_curcop to point to a valid op from which the filename structure
738 PL_curcop = &PL_compiling;
740 /* ensure comppad/curpad to refer to main's pad */
741 if (CvPADLIST(PL_main_cv)) {
742 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
744 op_free(PL_main_root);
747 PL_main_start = NULL;
748 SvREFCNT_dec(PL_main_cv);
752 /* Tell PerlIO we are about to tear things apart in case
753 we have layers which are using resources that should
757 PerlIO_destruct(aTHX);
759 if (PL_sv_objcount) {
761 * Try to destruct global references. We do this first so that the
762 * destructors and destructees still exist. Some sv's might remain.
763 * Non-referenced objects are on their own.
767 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
768 PL_defoutgv = NULL; /* may have been freed */
771 /* unhook hooks which will soon be, or use, destroyed data */
772 SvREFCNT_dec(PL_warnhook);
774 SvREFCNT_dec(PL_diehook);
777 /* call exit list functions */
778 while (PL_exitlistlen-- > 0)
779 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
781 Safefree(PL_exitlist);
786 SvREFCNT_dec(PL_registered_mros);
788 /* jettison our possibly duplicated environment */
789 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
790 * so we certainly shouldn't free it here
793 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
794 if (environ != PL_origenviron && !PL_use_safe_putenv
796 /* only main thread can free environ[0] contents */
797 && PL_curinterp == aTHX
803 for (i = 0; environ[i]; i++)
804 safesysfree(environ[i]);
806 /* Must use safesysfree() when working with environ. */
807 safesysfree(environ);
809 environ = PL_origenviron;
812 #endif /* !PERL_MICRO */
814 if (destruct_level == 0) {
816 DEBUG_P(debprofdump());
818 #if defined(PERLIO_LAYERS)
819 /* No more IO - including error messages ! */
820 PerlIO_cleanup(aTHX);
823 CopFILE_free(&PL_compiling);
824 CopSTASH_free(&PL_compiling);
826 /* The exit() function will do everything that needs doing. */
830 /* reset so print() ends up where we expect */
834 /* the syntax tree is shared between clones
835 * so op_free(PL_main_root) only ReREFCNT_dec's
836 * REGEXPs in the parent interpreter
837 * we need to manually ReREFCNT_dec for the clones
839 SvREFCNT_dec(PL_regex_padav);
840 PL_regex_padav = NULL;
844 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
845 PL_stashcache = NULL;
847 /* loosen bonds of global variables */
849 /* XXX can PL_parser still be non-null here? */
850 if(PL_parser && PL_parser->rsfp) {
851 (void)PerlIO_close(PL_parser->rsfp);
852 PL_parser->rsfp = NULL;
856 Safefree(PL_splitstr);
866 PL_doswitches = FALSE;
867 PL_dowarn = G_WARN_OFF;
868 PL_doextract = FALSE;
869 PL_sawampersand = FALSE; /* must save all match strings */
872 Safefree(PL_inplace);
874 SvREFCNT_dec(PL_patchlevel);
877 SvREFCNT_dec(PL_e_script);
883 /* magical thingies */
885 SvREFCNT_dec(PL_ofsgv); /* *, */
888 SvREFCNT_dec(PL_ors_sv); /* $\ */
891 SvREFCNT_dec(PL_rs); /* $/ */
894 Safefree(PL_osname); /* $^O */
897 SvREFCNT_dec(PL_statname);
901 /* defgv, aka *_ should be taken care of elsewhere */
903 /* clean up after study() */
904 SvREFCNT_dec(PL_lastscream);
905 PL_lastscream = NULL;
906 Safefree(PL_screamfirst);
908 Safefree(PL_screamnext);
912 Safefree(PL_efloatbuf);
916 /* startup and shutdown function lists */
917 SvREFCNT_dec(PL_beginav);
918 SvREFCNT_dec(PL_beginav_save);
919 SvREFCNT_dec(PL_endav);
920 SvREFCNT_dec(PL_checkav);
921 SvREFCNT_dec(PL_checkav_save);
922 SvREFCNT_dec(PL_unitcheckav);
923 SvREFCNT_dec(PL_unitcheckav_save);
924 SvREFCNT_dec(PL_initav);
926 PL_beginav_save = NULL;
929 PL_checkav_save = NULL;
930 PL_unitcheckav = NULL;
931 PL_unitcheckav_save = NULL;
934 /* shortcuts just get cleared */
943 PL_last_in_gv = NULL;
955 SvREFCNT_dec(PL_argvout_stack);
956 PL_argvout_stack = NULL;
958 SvREFCNT_dec(PL_modglobal);
960 SvREFCNT_dec(PL_preambleav);
961 PL_preambleav = NULL;
962 SvREFCNT_dec(PL_subname);
964 #ifdef PERL_USES_PL_PIDSTATUS
965 SvREFCNT_dec(PL_pidstatus);
968 SvREFCNT_dec(PL_toptarget);
970 SvREFCNT_dec(PL_bodytarget);
971 PL_bodytarget = NULL;
972 PL_formtarget = NULL;
974 /* free locale stuff */
975 #ifdef USE_LOCALE_COLLATE
976 Safefree(PL_collation_name);
977 PL_collation_name = NULL;
980 #ifdef USE_LOCALE_NUMERIC
981 Safefree(PL_numeric_name);
982 PL_numeric_name = NULL;
983 SvREFCNT_dec(PL_numeric_radix_sv);
984 PL_numeric_radix_sv = NULL;
987 /* clear utf8 character classes */
988 SvREFCNT_dec(PL_utf8_alnum);
989 SvREFCNT_dec(PL_utf8_ascii);
990 SvREFCNT_dec(PL_utf8_alpha);
991 SvREFCNT_dec(PL_utf8_space);
992 SvREFCNT_dec(PL_utf8_cntrl);
993 SvREFCNT_dec(PL_utf8_graph);
994 SvREFCNT_dec(PL_utf8_digit);
995 SvREFCNT_dec(PL_utf8_upper);
996 SvREFCNT_dec(PL_utf8_lower);
997 SvREFCNT_dec(PL_utf8_print);
998 SvREFCNT_dec(PL_utf8_punct);
999 SvREFCNT_dec(PL_utf8_xdigit);
1000 SvREFCNT_dec(PL_utf8_mark);
1001 SvREFCNT_dec(PL_utf8_toupper);
1002 SvREFCNT_dec(PL_utf8_totitle);
1003 SvREFCNT_dec(PL_utf8_tolower);
1004 SvREFCNT_dec(PL_utf8_tofold);
1005 SvREFCNT_dec(PL_utf8_idstart);
1006 SvREFCNT_dec(PL_utf8_idcont);
1007 PL_utf8_alnum = NULL;
1008 PL_utf8_ascii = NULL;
1009 PL_utf8_alpha = NULL;
1010 PL_utf8_space = NULL;
1011 PL_utf8_cntrl = NULL;
1012 PL_utf8_graph = NULL;
1013 PL_utf8_digit = NULL;
1014 PL_utf8_upper = NULL;
1015 PL_utf8_lower = NULL;
1016 PL_utf8_print = NULL;
1017 PL_utf8_punct = NULL;
1018 PL_utf8_xdigit = NULL;
1019 PL_utf8_mark = NULL;
1020 PL_utf8_toupper = NULL;
1021 PL_utf8_totitle = NULL;
1022 PL_utf8_tolower = NULL;
1023 PL_utf8_tofold = NULL;
1024 PL_utf8_idstart = NULL;
1025 PL_utf8_idcont = NULL;
1027 if (!specialWARN(PL_compiling.cop_warnings))
1028 PerlMemShared_free(PL_compiling.cop_warnings);
1029 PL_compiling.cop_warnings = NULL;
1030 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1031 PL_compiling.cop_hints_hash = NULL;
1032 CopFILE_free(&PL_compiling);
1033 CopSTASH_free(&PL_compiling);
1035 /* Prepare to destruct main symbol table. */
1040 SvREFCNT_dec(PL_curstname);
1041 PL_curstname = NULL;
1043 /* clear queued errors */
1044 SvREFCNT_dec(PL_errors);
1047 SvREFCNT_dec(PL_isarev);
1050 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1051 if (PL_scopestack_ix != 0)
1052 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1053 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1054 (long)PL_scopestack_ix);
1055 if (PL_savestack_ix != 0)
1056 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1057 "Unbalanced saves: %ld more saves than restores\n",
1058 (long)PL_savestack_ix);
1059 if (PL_tmps_floor != -1)
1060 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1061 (long)PL_tmps_floor + 1);
1062 if (cxstack_ix != -1)
1063 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1064 (long)cxstack_ix + 1);
1067 /* Now absolutely destruct everything, somehow or other, loops or no. */
1069 /* the 2 is for PL_fdpid and PL_strtab */
1070 while (sv_clean_all() > 2)
1073 AvREAL_off(PL_fdpid); /* no surviving entries */
1074 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1077 #ifdef HAVE_INTERP_INTERN
1081 /* Destruct the global string table. */
1083 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1084 * so that sv_free() won't fail on them.
1085 * Now that the global string table is using a single hunk of memory
1086 * for both HE and HEK, we either need to explicitly unshare it the
1087 * correct way, or actually free things here.
1090 const I32 max = HvMAX(PL_strtab);
1091 HE * const * const array = HvARRAY(PL_strtab);
1092 HE *hent = array[0];
1095 if (hent && ckWARN_d(WARN_INTERNAL)) {
1096 HE * const next = HeNEXT(hent);
1097 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1098 "Unbalanced string table refcount: (%ld) for \"%s\"",
1099 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1106 hent = array[riter];
1111 HvARRAY(PL_strtab) = 0;
1112 HvTOTALKEYS(PL_strtab) = 0;
1113 HvFILL(PL_strtab) = 0;
1115 SvREFCNT_dec(PL_strtab);
1118 /* free the pointer tables used for cloning */
1119 ptr_table_free(PL_ptr_table);
1120 PL_ptr_table = (PTR_TBL_t*)NULL;
1123 /* free special SVs */
1125 SvREFCNT(&PL_sv_yes) = 0;
1126 sv_clear(&PL_sv_yes);
1127 SvANY(&PL_sv_yes) = NULL;
1128 SvFLAGS(&PL_sv_yes) = 0;
1130 SvREFCNT(&PL_sv_no) = 0;
1131 sv_clear(&PL_sv_no);
1132 SvANY(&PL_sv_no) = NULL;
1133 SvFLAGS(&PL_sv_no) = 0;
1137 for (i=0; i<=2; i++) {
1138 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1139 sv_clear(PERL_DEBUG_PAD(i));
1140 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1141 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1145 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1146 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1148 #ifdef DEBUG_LEAKING_SCALARS
1149 if (PL_sv_count != 0) {
1154 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1155 svend = &sva[SvREFCNT(sva)];
1156 for (sv = sva + 1; sv < svend; ++sv) {
1157 if (SvTYPE(sv) != SVTYPEMASK) {
1158 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1160 " refcnt=%"UVuf pTHX__FORMAT "\n"
1161 "\tallocated at %s:%d %s %s%s\n",
1162 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1164 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1166 sv->sv_debug_inpad ? "for" : "by",
1167 sv->sv_debug_optype ?
1168 PL_op_name[sv->sv_debug_optype]: "(none)",
1169 sv->sv_debug_cloned ? " (cloned)" : ""
1171 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1172 Perl_dump_sv_child(aTHX_ sv);
1178 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1182 /* Wait for up to 4 seconds for child to terminate.
1183 This seems to be the least effort way of timing out on reaping
1185 struct timeval waitfor = {4, 0};
1186 int sock = PL_dumper_fd;
1190 FD_SET(sock, &rset);
1191 select(sock + 1, &rset, NULL, NULL, &waitfor);
1192 waitpid(child, &status, WNOHANG);
1197 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1203 #ifdef PERL_DEBUG_READONLY_OPS
1209 #if defined(PERLIO_LAYERS)
1210 /* No more IO - including error messages ! */
1211 PerlIO_cleanup(aTHX);
1214 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1215 as currently layers use it rather than NULL as a marker
1216 for no arg - and will try and SvREFCNT_dec it.
1218 SvREFCNT(&PL_sv_undef) = 0;
1219 SvREADONLY_off(&PL_sv_undef);
1221 Safefree(PL_origfilename);
1222 PL_origfilename = NULL;
1223 Safefree(PL_reg_start_tmp);
1224 PL_reg_start_tmp = (char**)NULL;
1225 PL_reg_start_tmpl = 0;
1226 Safefree(PL_reg_curpm);
1227 Safefree(PL_reg_poscache);
1228 free_tied_hv_pool();
1229 Safefree(PL_op_mask);
1230 Safefree(PL_psig_name);
1231 PL_psig_name = (SV**)NULL;
1232 PL_psig_ptr = (SV**)NULL;
1233 Safefree(PL_psig_pend);
1234 PL_psig_pend = (int*)NULL;
1236 /* We need to NULL PL_psig_pend first, so that
1237 signal handlers know not to use it */
1238 int *psig_save = PL_psig_pend;
1239 PL_psig_pend = (int*)NULL;
1240 Safefree(psig_save);
1244 PL_tainting = FALSE;
1245 PL_taint_warn = FALSE;
1246 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1249 DEBUG_P(debprofdump());
1251 #ifdef USE_REENTRANT_API
1252 Perl_reentrant_free(aTHX);
1257 while (PL_regmatch_slab) {
1258 regmatch_slab *s = PL_regmatch_slab;
1259 PL_regmatch_slab = PL_regmatch_slab->next;
1263 /* As the absolutely last thing, free the non-arena SV for mess() */
1266 /* we know that type == SVt_PVMG */
1268 /* it could have accumulated taint magic */
1271 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1272 moremagic = mg->mg_moremagic;
1273 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1275 Safefree(mg->mg_ptr);
1279 /* we know that type >= SVt_PV */
1280 SvPV_free(PL_mess_sv);
1281 Safefree(SvANY(PL_mess_sv));
1282 Safefree(PL_mess_sv);
1289 =for apidoc perl_free
1291 Releases a Perl interpreter. See L<perlembed>.
1301 PERL_ARGS_ASSERT_PERL_FREE;
1303 if (PL_veto_cleanup)
1306 #ifdef PERL_TRACK_MEMPOOL
1309 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1310 * value as we're probably hunting memory leaks then
1312 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1313 if (!s || atoi(s) == 0) {
1314 const U32 old_debug = PL_debug;
1315 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1316 thread at thread exit. */
1318 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1319 "free this thread's memory\n");
1320 PL_debug &= ~ DEBUG_m_FLAG;
1322 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1323 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1324 PL_debug = old_debug;
1329 #if defined(WIN32) || defined(NETWARE)
1330 # if defined(PERL_IMPLICIT_SYS)
1333 void *host = nw_internal_host;
1335 void *host = w32_internal_host;
1337 PerlMem_free(aTHXx);
1339 nw_delete_internal_host(host);
1341 win32_delete_internal_host(host);
1345 PerlMem_free(aTHXx);
1348 PerlMem_free(aTHXx);
1352 #if defined(USE_ITHREADS)
1353 /* provide destructors to clean up the thread key when libperl is unloaded */
1354 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1356 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1357 #pragma fini "perl_fini"
1358 #elif defined(__sun) && !defined(__GNUC__)
1359 #pragma fini (perl_fini)
1363 #if defined(__GNUC__)
1364 __attribute__((destructor))
1369 if (PL_curinterp && !PL_veto_cleanup)
1374 #endif /* THREADS */
1377 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1380 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1381 PL_exitlist[PL_exitlistlen].fn = fn;
1382 PL_exitlist[PL_exitlistlen].ptr = ptr;
1386 #ifdef HAS_PROCSELFEXE
1387 /* This is a function so that we don't hold on to MAXPATHLEN
1388 bytes of stack longer than necessary
1391 S_procself_val(pTHX_ SV *sv, const char *arg0)
1393 char buf[MAXPATHLEN];
1394 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1396 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1397 includes a spurious NUL which will cause $^X to fail in system
1398 or backticks (this will prevent extensions from being built and
1399 many tests from working). readlink is not meant to add a NUL.
1400 Normal readlink works fine.
1402 if (len > 0 && buf[len-1] == '\0') {
1406 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1407 returning the text "unknown" from the readlink rather than the path
1408 to the executable (or returning an error from the readlink). Any valid
1409 path has a '/' in it somewhere, so use that to validate the result.
1410 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1412 if (len > 0 && memchr(buf, '/', len)) {
1413 sv_setpvn(sv,buf,len);
1419 #endif /* HAS_PROCSELFEXE */
1422 S_set_caret_X(pTHX) {
1424 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1426 #ifdef HAS_PROCSELFEXE
1427 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1430 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1432 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1439 =for apidoc perl_parse
1441 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1447 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1454 PERL_ARGS_ASSERT_PERL_PARSE;
1455 #ifndef MULTIPLICITY
1456 PERL_UNUSED_ARG(my_perl);
1459 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1460 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1461 * This MUST be done before any hash stores or fetches take place.
1462 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1463 * yourself, it is your responsibility to provide a good random seed!
1464 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1465 if (!PL_rehash_seed_set)
1466 PL_rehash_seed = get_hash_seed();
1468 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1470 if (s && (atoi(s) == 1))
1471 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1473 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1478 if (PL_origalen != 0) {
1479 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1482 /* Set PL_origalen be the sum of the contiguous argv[]
1483 * elements plus the size of the env in case that it is
1484 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1485 * as the maximum modifiable length of $0. In the worst case
1486 * the area we are able to modify is limited to the size of
1487 * the original argv[0]. (See below for 'contiguous', though.)
1489 const char *s = NULL;
1492 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1493 /* Do the mask check only if the args seem like aligned. */
1495 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1497 /* See if all the arguments are contiguous in memory. Note
1498 * that 'contiguous' is a loose term because some platforms
1499 * align the argv[] and the envp[]. If the arguments look
1500 * like non-aligned, assume that they are 'strictly' or
1501 * 'traditionally' contiguous. If the arguments look like
1502 * aligned, we just check that they are within aligned
1503 * PTRSIZE bytes. As long as no system has something bizarre
1504 * like the argv[] interleaved with some other data, we are
1505 * fine. (Did I just evoke Murphy's Law?) --jhi */
1506 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1508 for (i = 1; i < PL_origargc; i++) {
1509 if ((PL_origargv[i] == s + 1
1511 || PL_origargv[i] == s + 2
1516 (PL_origargv[i] > s &&
1518 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1529 #ifndef PERL_USE_SAFE_PUTENV
1530 /* Can we grab env area too to be used as the area for $0? */
1531 if (s && PL_origenviron && !PL_use_safe_putenv) {
1532 if ((PL_origenviron[0] == s + 1)
1535 (PL_origenviron[0] > s &&
1536 PL_origenviron[0] <=
1537 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1540 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1541 s = PL_origenviron[0];
1544 my_setenv("NoNe SuCh", NULL);
1545 /* Force copy of environment. */
1546 for (i = 1; PL_origenviron[i]; i++) {
1547 if (PL_origenviron[i] == s + 1
1550 (PL_origenviron[i] > s &&
1551 PL_origenviron[i] <=
1552 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1555 s = PL_origenviron[i];
1563 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1565 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1570 /* Come here if running an undumped a.out. */
1572 PL_origfilename = savepv(argv[0]);
1573 PL_do_undump = FALSE;
1574 cxstack_ix = -1; /* start label stack again */
1576 assert (!PL_tainted);
1578 S_set_caret_X(aTHX);
1580 init_postdump_symbols(argc,argv,env);
1585 op_free(PL_main_root);
1586 PL_main_root = NULL;
1588 PL_main_start = NULL;
1589 SvREFCNT_dec(PL_main_cv);
1593 oldscope = PL_scopestack_ix;
1594 PL_dowarn = G_WARN_OFF;
1599 parse_body(env,xsinit);
1601 call_list(oldscope, PL_unitcheckav);
1603 call_list(oldscope, PL_checkav);
1610 /* my_exit() was called */
1611 while (PL_scopestack_ix > oldscope)
1614 PL_curstash = PL_defstash;
1616 call_list(oldscope, PL_unitcheckav);
1618 call_list(oldscope, PL_checkav);
1622 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1630 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1631 miniperl, and we need to see those flags reflected in the values here. */
1633 /* What this returns is subject to change. Use the public interface in Config.
1636 S_Internals_V(pTHX_ CV *cv)
1639 #ifdef LOCAL_PATCH_COUNT
1640 const int local_patch_count = LOCAL_PATCH_COUNT;
1642 const int local_patch_count = 0;
1644 const int entries = 4 + local_patch_count;
1646 static char non_bincompat_options[] =
1653 # ifdef PERL_DISABLE_PMC
1656 # ifdef PERL_DONT_CREATE_GVSV
1657 " PERL_DONT_CREATE_GVSV"
1659 # ifdef PERL_IS_MINIPERL
1662 # ifdef PERL_MALLOC_WRAP
1665 # ifdef PERL_MEM_LOG
1668 # ifdef PERL_MEM_LOG_NOIMPL
1669 " PERL_MEM_LOG_NOIMPL"
1671 # ifdef PERL_USE_DEVEL
1674 # ifdef PERL_USE_SAFE_PUTENV
1675 " PERL_USE_SAFE_PUTENV"
1677 # ifdef USE_SITECUSTOMIZE
1678 " USE_SITECUSTOMIZE"
1680 # ifdef USE_FAST_STDIO
1684 PERL_UNUSED_ARG(cv);
1685 PERL_UNUSED_ARG(items);
1687 EXTEND(SP, entries);
1689 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1690 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1691 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1695 PUSHs(Perl_newSVpvn_flags(aTHX_
1696 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1699 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1703 PUSHs(&PL_sv_undef);
1706 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN(OSNAME), SVs_TEMP));
1708 for (i = 1; i <= local_patch_count; i++) {
1709 /* This will be an undef, if PL_localpatches[i] is NULL. */
1710 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1716 #define INCPUSH_UNSHIFT 0x01
1717 #define INCPUSH_ADD_OLD_VERS 0x02
1718 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1719 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1720 #define INCPUSH_NOT_BASEDIR 0x10
1721 #define INCPUSH_CAN_RELOCATE 0x20
1722 #define INCPUSH_ADD_SUB_DIRS \
1723 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1726 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1730 int argc = PL_origargc;
1731 char **argv = PL_origargv;
1732 const char *scriptname = NULL;
1733 VOL bool dosearch = FALSE;
1735 const char *cddir = NULL;
1736 #ifdef USE_SITECUSTOMIZE
1737 bool minus_f = FALSE;
1739 SV *linestr_sv = newSV_type(SVt_PVIV);
1740 bool add_read_e_script = FALSE;
1742 SvGROW(linestr_sv, 80);
1743 sv_setpvs(linestr_sv,"");
1749 for (argc--,argv++; argc > 0; argc--,argv++) {
1750 if (argv[0][0] != '-' || !argv[0][1])
1756 #ifndef PERL_STRICT_CR
1780 if ((s = moreswitches(s)))
1785 CHECK_MALLOC_TOO_LATE_FOR('t');
1786 if( !PL_tainting ) {
1787 PL_taint_warn = TRUE;
1793 CHECK_MALLOC_TOO_LATE_FOR('T');
1795 PL_taint_warn = FALSE;
1803 forbid_setid('e', FALSE);
1805 PL_e_script = newSVpvs("");
1806 add_read_e_script = TRUE;
1809 sv_catpv(PL_e_script, s);
1811 sv_catpv(PL_e_script, argv[1]);
1815 Perl_croak(aTHX_ "No code specified for -%c", c);
1816 sv_catpvs(PL_e_script, "\n");
1820 #ifdef USE_SITECUSTOMIZE
1826 case 'I': /* -I handled both here and in moreswitches() */
1827 forbid_setid('I', FALSE);
1828 if (!*++s && (s=argv[1]) != NULL) {
1832 STRLEN len = strlen(s);
1833 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1836 Perl_croak(aTHX_ "No directory specified for -I");
1839 forbid_setid('S', FALSE);
1847 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1849 opts_prog = newSVpvs("Config::_V()");
1853 opts_prog = Perl_newSVpvf(aTHX_
1854 "Config::config_vars(qw%c%s%c)",
1858 av_push(PL_preambleav, opts_prog);
1859 /* don't look for script or read stdin */
1860 scriptname = BIT_BUCKET;
1864 PL_doextract = TRUE;
1872 if (!*++s || isSPACE(*s)) {
1876 /* catch use of gnu style long options */
1877 if (strEQ(s, "version")) {
1881 if (strEQ(s, "help")) {
1888 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1899 #ifndef SECURE_INTERNAL_GETENV
1902 (s = PerlEnv_getenv("PERL5OPT")))
1906 if (*s == '-' && *(s+1) == 'T') {
1907 CHECK_MALLOC_TOO_LATE_FOR('T');
1909 PL_taint_warn = FALSE;
1912 char *popt_copy = NULL;
1925 if (!strchr("CDIMUdmtwW", *s))
1926 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1930 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1931 s = popt_copy + (s - d);
1939 if( !PL_tainting ) {
1940 PL_taint_warn = TRUE;
1951 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1953 /* SITELIB_EXP is a function call on Win32.
1954 The games with local $! are to avoid setting errno if there is no
1955 sitecustomize script. */
1956 const char *const sitelib = SITELIB_EXP;
1957 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1959 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1964 scriptname = argv[0];
1967 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1969 else if (scriptname == NULL) {
1971 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1977 /* Set $^X early so that it can be used for relocatable paths in @INC */
1978 assert (!PL_tainted);
1980 S_set_caret_X(aTHX);
1985 bool suidscript = FALSE;
1987 open_script(scriptname, dosearch, &suidscript, &rsfp);
1989 validate_suid(validarg, scriptname, fdscript, suidscript,
1993 # if defined(SIGCHLD) || defined(SIGCLD)
1996 # define SIGCHLD SIGCLD
1998 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1999 if (sigstate == (Sighandler_t) SIG_IGN) {
2000 if (ckWARN(WARN_SIGNAL))
2001 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2002 "Can't ignore signal CHLD, forcing to default");
2003 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2011 /* This will croak if suidscript is true, as -x cannot be used with
2013 forbid_setid('x', suidscript);
2014 /* Hence you can't get here if suidscript is true */
2016 find_beginning(linestr_sv, rsfp);
2017 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2018 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2022 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2023 CvUNIQUE_on(PL_compcv);
2025 CvPADLIST(PL_compcv) = pad_new(0);
2027 PL_isarev = newHV();
2030 boot_core_UNIVERSAL();
2032 newXS("Internals::V", S_Internals_V, __FILE__);
2035 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2037 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2043 # ifdef HAS_SOCKS5_INIT
2044 socks5_init(argv[0]);
2050 init_predump_symbols();
2051 /* init_postdump_symbols not currently designed to be called */
2052 /* more than once (ENV isn't cleared first, for example) */
2053 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2055 init_postdump_symbols(argc,argv,env);
2057 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2058 * or explicitly in some platforms.
2059 * locale.c:Perl_init_i18nl10n() if the environment
2060 * look like the user wants to use UTF-8. */
2061 #if defined(__SYMBIAN32__)
2062 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2064 # ifndef PERL_IS_MINIPERL
2066 /* Requires init_predump_symbols(). */
2067 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2072 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2073 * and the default open disciplines. */
2074 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2075 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2077 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2078 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2079 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2081 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2082 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2083 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2085 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2086 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2087 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2089 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2090 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2093 sv_setpvs(sv, ":utf8\0:utf8");
2095 sv_setpvs(sv, ":utf8\0");
2098 sv_setpvs(sv, "\0:utf8");
2107 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2108 if (strEQ(s, "unsafe"))
2109 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2110 else if (strEQ(s, "safe"))
2111 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2113 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2120 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2124 PL_xmlfp = PerlIO_stdout();
2126 PL_xmlfp = PerlIO_open(s, "w");
2128 Perl_croak(aTHX_ "Can't open %s", s);
2130 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2136 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2137 PL_madskills = atoi(s);
2138 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2143 lex_start(linestr_sv, rsfp, TRUE);
2144 PL_subname = newSVpvs("main");
2146 if (add_read_e_script)
2147 filter_add(read_e_script, NULL);
2149 /* now parse the script */
2151 SETERRNO(0,SS_NORMAL);
2152 if (yyparse() || PL_parser->error_count) {
2154 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2156 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2160 CopLINE_set(PL_curcop, 0);
2161 PL_curstash = PL_defstash;
2163 SvREFCNT_dec(PL_e_script);
2171 SAVECOPFILE(PL_curcop);
2172 SAVECOPLINE(PL_curcop);
2173 gv_check(PL_defstash);
2182 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2183 dump_mstats("after compilation:");
2193 =for apidoc perl_run
2195 Tells a Perl interpreter to run. See L<perlembed>.
2208 PERL_ARGS_ASSERT_PERL_RUN;
2209 #ifndef MULTIPLICITY
2210 PERL_UNUSED_ARG(my_perl);
2213 oldscope = PL_scopestack_ix;
2221 cxstack_ix = -1; /* start context stack again */
2223 case 0: /* normal completion */
2227 case 2: /* my_exit() */
2228 while (PL_scopestack_ix > oldscope)
2231 PL_curstash = PL_defstash;
2232 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2233 PL_endav && !PL_minus_c)
2234 call_list(oldscope, PL_endav);
2236 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2237 dump_mstats("after execution: ");
2243 POPSTACK_TO(PL_mainstack);
2246 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2257 S_run_body(pTHX_ I32 oldscope)
2260 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2261 PL_sawampersand ? "Enabling" : "Omitting"));
2263 if (!PL_restartop) {
2267 exit(0); /* less likely to core dump than my_exit(0) */
2271 if (DEBUG_x_TEST || DEBUG_B_TEST)
2272 dump_all_perl(!DEBUG_B_TEST);
2274 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2278 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2281 if (PERLDB_SINGLE && PL_DBsingle)
2282 sv_setiv(PL_DBsingle, 1);
2284 call_list(oldscope, PL_initav);
2285 #ifdef PERL_DEBUG_READONLY_OPS
2286 Perl_pending_Slabs_to_ro(aTHX);
2293 PL_op = PL_restartop;
2297 else if (PL_main_start) {
2298 CvDEPTH(PL_main_cv) = 1;
2299 PL_op = PL_main_start;
2307 =head1 SV Manipulation Functions
2309 =for apidoc p||get_sv
2311 Returns the SV of the specified Perl scalar. C<flags> are passed to
2312 C<gv_fetchpv>. If C<GV_ADD> is set and the
2313 Perl variable does not exist then it will be created. If C<flags> is zero
2314 and the variable does not exist then NULL is returned.
2320 Perl_get_sv(pTHX_ const char *name, I32 flags)
2324 PERL_ARGS_ASSERT_GET_SV;
2326 gv = gv_fetchpv(name, flags, SVt_PV);
2333 =head1 Array Manipulation Functions
2335 =for apidoc p||get_av
2337 Returns the AV of the specified Perl array. C<flags> are passed to
2338 C<gv_fetchpv>. If C<GV_ADD> is set and the
2339 Perl variable does not exist then it will be created. If C<flags> is zero
2340 and the variable does not exist then NULL is returned.
2346 Perl_get_av(pTHX_ const char *name, I32 flags)
2348 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2350 PERL_ARGS_ASSERT_GET_AV;
2360 =head1 Hash Manipulation Functions
2362 =for apidoc p||get_hv
2364 Returns the HV of the specified Perl hash. C<flags> are passed to
2365 C<gv_fetchpv>. If C<GV_ADD> is set and the
2366 Perl variable does not exist then it will be created. If C<flags> is zero
2367 and the variable does not exist then NULL is returned.
2373 Perl_get_hv(pTHX_ const char *name, I32 flags)
2375 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2377 PERL_ARGS_ASSERT_GET_HV;
2387 =head1 CV Manipulation Functions
2389 =for apidoc p||get_cvn_flags
2391 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2392 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2393 exist then it will be declared (which has the same effect as saying
2394 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2395 then NULL is returned.
2397 =for apidoc p||get_cv
2399 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2405 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2407 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2408 /* XXX this is probably not what they think they're getting.
2409 * It has the same effect as "sub name;", i.e. just a forward
2412 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2414 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2415 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2416 return newSUB(start_subparse(FALSE, 0),
2417 newSVOP(OP_CONST, 0, sv),
2425 /* Nothing in core calls this now, but we can't replace it with a macro and
2426 move it to mathoms.c as a macro would evaluate name twice. */
2428 Perl_get_cv(pTHX_ const char *name, I32 flags)
2430 PERL_ARGS_ASSERT_GET_CV;
2432 return get_cvn_flags(name, strlen(name), flags);
2435 /* Be sure to refetch the stack pointer after calling these routines. */
2439 =head1 Callback Functions
2441 =for apidoc p||call_argv
2443 Performs a callback to the specified Perl sub. See L<perlcall>.
2449 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2451 /* See G_* flags in cop.h */
2452 /* null terminated arg list */
2457 PERL_ARGS_ASSERT_CALL_ARGV;
2462 mXPUSHs(newSVpv(*argv,0));
2467 return call_pv(sub_name, flags);
2471 =for apidoc p||call_pv
2473 Performs a callback to the specified Perl sub. See L<perlcall>.
2479 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2480 /* name of the subroutine */
2481 /* See G_* flags in cop.h */
2483 PERL_ARGS_ASSERT_CALL_PV;
2485 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2489 =for apidoc p||call_method
2491 Performs a callback to the specified Perl method. The blessed object must
2492 be on the stack. See L<perlcall>.
2498 Perl_call_method(pTHX_ const char *methname, I32 flags)
2499 /* name of the subroutine */
2500 /* See G_* flags in cop.h */
2503 PERL_ARGS_ASSERT_CALL_METHOD;
2505 len = strlen(methname);
2507 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2508 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2511 /* May be called with any of a CV, a GV, or an SV containing the name. */
2513 =for apidoc p||call_sv
2515 Performs a callback to the Perl sub whose name is in the SV. See
2522 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2523 /* See G_* flags in cop.h */
2526 LOGOP myop; /* fake syntax tree node */
2531 bool oldcatch = CATCH_GET;
2533 OP* const oldop = PL_op;
2536 PERL_ARGS_ASSERT_CALL_SV;
2538 if (flags & G_DISCARD) {
2542 if (!(flags & G_WANT)) {
2543 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2548 Zero(&myop, 1, LOGOP);
2549 myop.op_next = NULL;
2550 if (!(flags & G_NOARGS))
2551 myop.op_flags |= OPf_STACKED;
2552 myop.op_flags |= OP_GIMME_REVERSE(flags);
2556 EXTEND(PL_stack_sp, 1);
2557 *++PL_stack_sp = sv;
2559 oldscope = PL_scopestack_ix;
2561 if (PERLDB_SUB && PL_curstash != PL_debstash
2562 /* Handle first BEGIN of -d. */
2563 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2564 /* Try harder, since this may have been a sighandler, thus
2565 * curstash may be meaningless. */
2566 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2567 && !(flags & G_NODEBUG))
2568 PL_op->op_private |= OPpENTERSUB_DB;
2570 if (flags & G_METHOD) {
2571 Zero(&method_op, 1, UNOP);
2572 method_op.op_next = PL_op;
2573 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2574 method_op.op_type = OP_METHOD;
2575 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2576 myop.op_type = OP_ENTERSUB;
2577 PL_op = (OP*)&method_op;
2580 if (!(flags & G_EVAL)) {
2582 CALL_BODY_SUB((OP*)&myop);
2583 retval = PL_stack_sp - (PL_stack_base + oldmark);
2584 CATCH_SET(oldcatch);
2587 myop.op_other = (OP*)&myop;
2589 create_eval_scope(flags|G_FAKINGEVAL);
2597 CALL_BODY_SUB((OP*)&myop);
2598 retval = PL_stack_sp - (PL_stack_base + oldmark);
2599 if (!(flags & G_KEEPERR)) {
2607 /* my_exit() was called */
2608 PL_curstash = PL_defstash;
2611 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2612 Perl_croak(aTHX_ "Callback called exit");
2617 PL_op = PL_restartop;
2621 PL_stack_sp = PL_stack_base + oldmark;
2622 if ((flags & G_WANT) == G_ARRAY)
2626 *++PL_stack_sp = &PL_sv_undef;
2631 if (PL_scopestack_ix > oldscope)
2632 delete_eval_scope();
2636 if (flags & G_DISCARD) {
2637 PL_stack_sp = PL_stack_base + oldmark;
2646 /* Eval a string. The G_EVAL flag is always assumed. */
2649 =for apidoc p||eval_sv
2651 Tells Perl to C<eval> the string in the SV.
2657 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2659 /* See G_* flags in cop.h */
2663 UNOP myop; /* fake syntax tree node */
2664 VOL I32 oldmark = SP - PL_stack_base;
2667 OP* const oldop = PL_op;
2670 PERL_ARGS_ASSERT_EVAL_SV;
2672 if (flags & G_DISCARD) {
2679 Zero(PL_op, 1, UNOP);
2680 EXTEND(PL_stack_sp, 1);
2681 *++PL_stack_sp = sv;
2683 if (!(flags & G_NOARGS))
2684 myop.op_flags = OPf_STACKED;
2685 myop.op_next = NULL;
2686 myop.op_type = OP_ENTEREVAL;
2687 myop.op_flags |= OP_GIMME_REVERSE(flags);
2688 if (flags & G_KEEPERR)
2689 myop.op_flags |= OPf_SPECIAL;
2691 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2692 * before a PUSHEVAL, which corrupts the stack after a croak */
2693 TAINT_PROPER("eval_sv()");
2699 CALL_BODY_EVAL((OP*)&myop);
2700 retval = PL_stack_sp - (PL_stack_base + oldmark);
2701 if (!(flags & G_KEEPERR)) {
2709 /* my_exit() was called */
2710 PL_curstash = PL_defstash;
2713 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2714 Perl_croak(aTHX_ "Callback called exit");
2719 PL_op = PL_restartop;
2723 PL_stack_sp = PL_stack_base + oldmark;
2724 if ((flags & G_WANT) == G_ARRAY)
2728 *++PL_stack_sp = &PL_sv_undef;
2734 if (flags & G_DISCARD) {
2735 PL_stack_sp = PL_stack_base + oldmark;
2745 =for apidoc p||eval_pv
2747 Tells Perl to C<eval> the given string and return an SV* result.
2753 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2757 SV* sv = newSVpv(p, 0);
2759 PERL_ARGS_ASSERT_EVAL_PV;
2761 eval_sv(sv, G_SCALAR);
2768 if (croak_on_error && SvTRUE(ERRSV)) {
2769 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2775 /* Require a module. */
2778 =head1 Embedding Functions
2780 =for apidoc p||require_pv
2782 Tells Perl to C<require> the file named by the string argument. It is
2783 analogous to the Perl code C<eval "require '$file'">. It's even
2784 implemented that way; consider using load_module instead.
2789 Perl_require_pv(pTHX_ const char *pv)
2795 PERL_ARGS_ASSERT_REQUIRE_PV;
2797 PUSHSTACKi(PERLSI_REQUIRE);
2799 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2800 eval_sv(sv_2mortal(sv), G_DISCARD);
2806 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2808 /* This message really ought to be max 23 lines.
2809 * Removed -h because the user already knows that option. Others? */
2811 static const char * const usage_msg[] = {
2812 "-0[octal] specify record separator (\\0, if no argument)",
2813 "-a autosplit mode with -n or -p (splits $_ into @F)",
2814 "-C[number/list] enables the listed Unicode features",
2815 "-c check syntax only (runs BEGIN and CHECK blocks)",
2816 "-d[:debugger] run program under debugger",
2817 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2818 "-e program one line of program (several -e's allowed, omit programfile)",
2819 "-E program like -e, but enables all optional features",
2820 "-f don't do $sitelib/sitecustomize.pl at startup",
2821 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2822 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2823 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2824 "-l[octal] enable line ending processing, specifies line terminator",
2825 "-[mM][-]module execute \"use/no module...\" before executing program",
2826 "-n assume \"while (<>) { ... }\" loop around program",
2827 "-p assume loop like -n but print line also, like sed",
2828 "-s enable rudimentary parsing for switches after programfile",
2829 "-S look for programfile using PATH environment variable",
2830 "-t enable tainting warnings",
2831 "-T enable tainting checks",
2832 "-u dump core after parsing program",
2833 "-U allow unsafe operations",
2834 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2835 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2836 "-w enable many useful warnings (RECOMMENDED)",
2837 "-W enable all warnings",
2838 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2839 "-X disable all warnings",
2843 const char * const *p = usage_msg;
2845 PERL_ARGS_ASSERT_USAGE;
2847 PerlIO_printf(PerlIO_stdout(),
2848 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2851 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2854 /* convert a string of -D options (or digits) into an int.
2855 * sets *s to point to the char after the options */
2859 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2861 static const char * const usage_msgd[] = {
2862 " Debugging flag values: (see also -d)",
2863 " p Tokenizing and parsing (with v, displays parse stack)",
2864 " s Stack snapshots (with v, displays all stacks)",
2865 " l Context (loop) stack processing",
2866 " t Trace execution",
2867 " o Method and overloading resolution",
2868 " c String/numeric conversions",
2869 " P Print profiling info, source file input state",
2870 " m Memory and SV allocation",
2871 " f Format processing",
2872 " r Regular expression parsing and execution",
2873 " x Syntax tree dump",
2874 " u Tainting checks",
2875 " H Hash dump -- usurps values()",
2876 " X Scratchpad allocation",
2879 " R Include reference counts of dumped variables (eg when using -Ds)",
2880 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2881 " v Verbose: use in conjunction with other flags",
2883 " A Consistency checks on internal structures",
2884 " q quiet - currently only suppresses the 'EXECUTING' message",
2885 " M trace smart match resolution",
2886 " B dump suBroutine definitions, including special Blocks like BEGIN",
2891 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2894 /* if adding extra options, remember to update DEBUG_MASK */
2895 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2897 for (; isALNUM(**s); (*s)++) {
2898 const char * const d = strchr(debopts,**s);
2900 i |= 1 << (d - debopts);
2901 else if (ckWARN_d(WARN_DEBUGGING))
2902 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2903 "invalid option -D%c, use -D'' to see choices\n", **s);
2906 else if (isDIGIT(**s)) {
2908 for (; isALNUM(**s); (*s)++) ;
2910 else if (givehelp) {
2911 const char *const *p = usage_msgd;
2912 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2915 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2916 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2917 "-Dp not implemented on this platform\n");
2923 /* This routine handles any switches that can be given during run */
2926 Perl_moreswitches(pTHX_ const char *s)
2930 const char option = *s; /* used to remember option in -m/-M code */
2932 PERL_ARGS_ASSERT_MORESWITCHES;
2940 SvREFCNT_dec(PL_rs);
2941 if (s[1] == 'x' && s[2]) {
2942 const char *e = s+=2;
2948 flags = PERL_SCAN_SILENT_ILLDIGIT;
2949 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2950 if (s + numlen < e) {
2951 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2955 PL_rs = newSVpvs("");
2956 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2957 tmps = (U8*)SvPVX(PL_rs);
2958 uvchr_to_utf8(tmps, rschar);
2959 SvCUR_set(PL_rs, UNISKIP(rschar));
2964 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2965 if (rschar & ~((U8)~0))
2966 PL_rs = &PL_sv_undef;
2967 else if (!rschar && numlen >= 2)
2968 PL_rs = newSVpvs("");
2970 char ch = (char)rschar;
2971 PL_rs = newSVpvn(&ch, 1);
2974 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2979 PL_unicode = parse_unicode_opts( (const char **)&s );
2980 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2986 while (*s && !isSPACE(*s)) ++s;
2987 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2998 forbid_setid('d', FALSE);
3001 /* -dt indicates to the debugger that threads will be used */
3002 if (*s == 't' && !isALNUM(s[1])) {
3004 my_setenv("PERL5DB_THREADED", "1");
3007 /* The following permits -d:Mod to accepts arguments following an =
3008 in the fashion that -MSome::Mod does. */
3009 if (*s == ':' || *s == '=') {
3010 const char *start = ++s;
3011 const char *const end = s + strlen(s);
3012 SV * const sv = newSVpvs("use Devel::");
3014 /* We now allow -d:Module=Foo,Bar */
3015 while(isALNUM(*s) || *s==':') ++s;
3017 sv_catpvn(sv, start, end - start);
3019 sv_catpvn(sv, start, s-start);
3020 /* Don't use NUL as q// delimiter here, this string goes in the
3022 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3025 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3029 PL_perldb = PERLDB_ALL;
3036 forbid_setid('D', FALSE);
3038 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3039 #else /* !DEBUGGING */
3040 if (ckWARN_d(WARN_DEBUGGING))
3041 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3042 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3043 for (s++; isALNUM(*s); s++) ;
3048 usage(PL_origargv[0]);
3051 Safefree(PL_inplace);
3052 #if defined(__CYGWIN__) /* do backup extension automagically */
3053 if (*(s+1) == '\0') {
3054 PL_inplace = savepvs(".bak");
3057 #endif /* __CYGWIN__ */
3059 const char * const start = ++s;
3060 while (*s && !isSPACE(*s))
3063 PL_inplace = savepvn(start, s - start);
3067 if (*s == '-') /* Additional switches on #! line. */
3071 case 'I': /* -I handled both here and in parse_body() */
3072 forbid_setid('I', FALSE);
3074 while (*s && isSPACE(*s))
3079 /* ignore trailing spaces (possibly followed by other switches) */
3081 for (e = p; *e && !isSPACE(*e); e++) ;
3085 } while (*p && *p != '-');
3087 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3093 Perl_croak(aTHX_ "No directory specified for -I");
3099 SvREFCNT_dec(PL_ors_sv);
3105 PL_ors_sv = newSVpvs("\n");
3106 numlen = 3 + (*s == '0');
3107 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3111 if (RsPARA(PL_rs)) {
3112 PL_ors_sv = newSVpvs("\n\n");
3115 PL_ors_sv = newSVsv(PL_rs);
3120 forbid_setid('M', FALSE); /* XXX ? */
3123 forbid_setid('m', FALSE); /* XXX ? */
3128 const char *use = "use ";
3130 /* -M-foo == 'no foo' */
3131 /* Leading space on " no " is deliberate, to make both
3132 possibilities the same length. */
3133 if (*s == '-') { use = " no "; ++s; }
3134 sv = newSVpvn(use,4);
3136 /* We allow -M'Module qw(Foo Bar)' */
3137 while(isALNUM(*s) || *s==':') {
3146 Perl_croak(aTHX_ "Module name required with -%c option",
3149 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3150 "contains single ':'",
3151 (int)(s - start), start, option);
3152 end = s + strlen(s);
3154 sv_catpvn(sv, start, end - start);
3155 if (option == 'm') {
3157 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3158 sv_catpvs( sv, " ()");
3161 sv_catpvn(sv, start, s-start);
3162 /* Use NUL as q''-delimiter. */
3163 sv_catpvs(sv, " split(/,/,q\0");
3165 sv_catpvn(sv, s, end - s);
3166 sv_catpvs(sv, "\0)");
3169 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3172 Perl_croak(aTHX_ "Missing argument to -%c", option);
3183 forbid_setid('s', FALSE);
3184 PL_doswitches = TRUE;
3198 PL_do_undump = TRUE;
3206 if (!sv_derived_from(PL_patchlevel, "version"))
3207 upg_version(PL_patchlevel, TRUE);
3210 SV* level= vstringify(PL_patchlevel);
3211 #ifdef PERL_PATCHNUM
3212 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3213 SV *num = newSVpvs(PERL_PATCHNUM "*");
3215 SV *num = newSVpvs(PERL_PATCHNUM);
3218 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3219 SvREFCNT_dec(level);
3222 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3226 PerlIO_printf(PerlIO_stdout(),
3227 "\nThis is perl, %"SVf
3231 SvREFCNT_dec(level);
3234 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3237 SVfARG(vstringify(PL_patchlevel))));
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ " built under %s at %s %s\n",
3240 OSNAME, __DATE__, __TIME__));
3241 PerlIO_printf(PerlIO_stdout(),
3242 Perl_form(aTHX_ " OS Specific Release: %s\n",
3245 #if defined(LOCAL_PATCH_COUNT)
3246 if (LOCAL_PATCH_COUNT > 0)
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\n(with %d registered patch%s, "
3249 "see perl -V for more detail)",
3251 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\n\nCopyright 1987-2009, Larry Wall\n");
3257 PerlIO_printf(PerlIO_stdout(),
3258 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3261 PerlIO_printf(PerlIO_stdout(),
3262 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3263 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3268 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "atariST series port, ++jrb bammi@cadence.com\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "EPOC port by Olaf Flebbe, 1999-2002\n");
3303 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3307 #ifdef __SYMBIAN32__
3308 PerlIO_printf(PerlIO_stdout(),
3309 "Symbian port by Nokia, 2004-2005\n");
3311 #ifdef BINARY_BUILD_NOTICE
3312 BINARY_BUILD_NOTICE;
3314 PerlIO_printf(PerlIO_stdout(),
3316 Perl may be copied only under the terms of either the Artistic License or the\n\
3317 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3318 Complete documentation for Perl, including FAQ lists, should be found on\n\
3319 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3320 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3323 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3324 PL_dowarn |= G_WARN_ON;
3329 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3330 if (!specialWARN(PL_compiling.cop_warnings))
3331 PerlMemShared_free(PL_compiling.cop_warnings);
3332 PL_compiling.cop_warnings = pWARN_ALL ;
3336 PL_dowarn = G_WARN_ALL_OFF;
3337 if (!specialWARN(PL_compiling.cop_warnings))
3338 PerlMemShared_free(PL_compiling.cop_warnings);
3339 PL_compiling.cop_warnings = pWARN_NONE ;
3346 if (s[0] == '-') /* Additional switches on #! line. */
3351 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3357 #ifdef ALTERNATE_SHEBANG
3358 case 'S': /* OS/2 needs -S on "extproc" line. */
3362 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3367 /* compliments of Tom Christiansen */
3369 /* unexec() can be found in the Gnu emacs distribution */
3370 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3373 Perl_my_unexec(pTHX)
3375 PERL_UNUSED_CONTEXT;
3377 SV * prog = newSVpv(BIN_EXP, 0);
3378 SV * file = newSVpv(PL_origfilename, 0);
3382 sv_catpvs(prog, "/perl");
3383 sv_catpvs(file, ".perldump");
3385 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3386 /* unexec prints msg to stderr in case of failure */
3387 PerlProc_exit(status);
3390 # include <lib$routines.h>
3391 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3392 # elif defined(WIN32) || defined(__CYGWIN__)
3393 Perl_croak(aTHX_ "dump is not supported");
3395 ABORT(); /* for use with undump */
3400 /* initialize curinterp */
3406 # define PERLVAR(var,type)
3407 # define PERLVARA(var,n,type)
3408 # if defined(PERL_IMPLICIT_CONTEXT)
3409 # define PERLVARI(var,type,init) aTHX->var = init;
3410 # define PERLVARIC(var,type,init) aTHX->var = init;
3412 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3413 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3415 # include "intrpvar.h"
3421 # define PERLVAR(var,type)
3422 # define PERLVARA(var,n,type)
3423 # define PERLVARI(var,type,init) PL_##var = init;
3424 # define PERLVARIC(var,type,init) PL_##var = init;
3425 # include "intrpvar.h"
3432 /* As these are inside a structure, PERLVARI isn't capable of initialising
3434 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3435 PL_reg_poscache = PL_reg_starttry = NULL;
3439 S_init_main_stash(pTHX)
3444 PL_curstash = PL_defstash = newHV();
3445 /* We know that the string "main" will be in the global shared string
3446 table, so it's a small saving to use it rather than allocate another
3448 PL_curstname = newSVpvs_share("main");
3449 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3450 /* If we hadn't caused another reference to "main" to be in the shared
3451 string table above, then it would be worth reordering these two,
3452 because otherwise all we do is delete "main" from it as a consequence
3453 of the SvREFCNT_dec, only to add it again with hv_name_set */
3454 SvREFCNT_dec(GvHV(gv));
3455 hv_name_set(PL_defstash, "main", 4, 0);
3456 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3458 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3460 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3461 GvMULTI_on(PL_incgv);
3462 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3463 GvMULTI_on(PL_hintgv);
3464 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3465 SvREFCNT_inc_simple_void(PL_defgv);
3466 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3467 SvREFCNT_inc_simple_void(PL_errgv);
3468 GvMULTI_on(PL_errgv);
3469 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3470 GvMULTI_on(PL_replgv);
3471 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3472 #ifdef PERL_DONT_CREATE_GVSV
3475 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3477 PL_curstash = PL_defstash;
3478 CopSTASH_set(&PL_compiling, PL_defstash);
3479 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3480 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3482 /* We must init $/ before switches are processed. */
3483 sv_setpvs(get_sv("/", GV_ADD), "\n");
3487 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3488 bool *suidscript, PerlIO **rsfpp)
3493 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3496 PL_origfilename = savepvs("-e");
3499 /* if find_script() returns, it returns a malloc()-ed value */
3500 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3502 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3503 const char *s = scriptname + 8;
3509 * Tell apart "normal" usage of fdscript, e.g.
3510 * with bash on FreeBSD:
3511 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3512 * from usage in suidperl.
3513 * Does any "normal" usage leave garbage after the number???
3514 * Is it a mistake to use a similar /dev/fd/ construct for
3519 * Be supersafe and do some sanity-checks.
3520 * Still, can we be sure we got the right thing?
3523 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3526 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3528 scriptname = savepv(s + 1);
3529 Safefree(PL_origfilename);
3530 PL_origfilename = (char *)scriptname;
3535 CopFILE_free(PL_curcop);
3536 CopFILE_set(PL_curcop, PL_origfilename);
3537 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3538 scriptname = (char *)"";
3539 if (fdscript >= 0) {
3540 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3541 # if defined(HAS_FCNTL) && defined(F_SETFD)
3543 /* ensure close-on-exec */
3544 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3547 else if (!*scriptname) {
3548 forbid_setid(0, *suidscript);
3549 *rsfpp = PerlIO_stdin();
3552 #ifdef FAKE_BIT_BUCKET
3553 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3554 * is called) and still have the "-e" work. (Believe it or not,
3555 * a /dev/null is required for the "-e" to work because source
3556 * filter magic is used to implement it. ) This is *not* a general
3557 * replacement for a /dev/null. What we do here is create a temp
3558 * file (an empty file), open up that as the script, and then
3559 * immediately close and unlink it. Close enough for jazz. */
3560 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3561 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3562 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3563 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3564 FAKE_BIT_BUCKET_TEMPLATE
3566 const char * const err = "Failed to create a fake bit bucket";
3567 if (strEQ(scriptname, BIT_BUCKET)) {
3568 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3569 int tmpfd = mkstemp(tmpname);
3571 scriptname = tmpname;
3574 Perl_croak(aTHX_ err);
3577 scriptname = mktemp(tmpname);
3579 Perl_croak(aTHX_ err);
3584 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3585 #ifdef FAKE_BIT_BUCKET
3586 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3587 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3588 && strlen(scriptname) == sizeof(tmpname) - 1) {
3591 scriptname = BIT_BUCKET;
3593 # if defined(HAS_FCNTL) && defined(F_SETFD)
3595 /* ensure close-on-exec */
3596 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3600 /* PSz 16 Sep 03 Keep neat error message */
3602 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3604 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3605 CopFILE(PL_curcop), Strerror(errno));
3611 * I_SYSSTATVFS HAS_FSTATVFS
3613 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3614 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3615 * here so that metaconfig picks them up. */
3618 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3619 /* Don't even need this function. */
3622 S_validate_suid(pTHX_ PerlIO *rsfp)
3624 PERL_ARGS_ASSERT_VALIDATE_SUID;
3626 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3629 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3630 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3632 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3635 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3636 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3637 /* not set-id, must be wrapped */
3640 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3643 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3647 register const char *s2;
3649 PERL_ARGS_ASSERT_FIND_BEGINNING;
3651 /* skip forward in input to the real script? */
3653 while (PL_doextract) {
3654 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3655 Perl_croak(aTHX_ "No Perl script found in input\n");
3657 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3658 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3659 PL_doextract = FALSE;
3660 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3662 while (*s == ' ' || *s == '\t') s++;
3664 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3665 || s2[-1] == '_') s2--;
3666 if (strnEQ(s2-4,"perl",4))
3667 while ((s = moreswitches(s)))
3679 PL_uid = PerlProc_getuid();
3680 PL_euid = PerlProc_geteuid();
3681 PL_gid = PerlProc_getgid();
3682 PL_egid = PerlProc_getegid();
3684 PL_uid |= PL_gid << 16;
3685 PL_euid |= PL_egid << 16;
3687 /* Should not happen: */
3688 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3689 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3692 * Should go by suidscript, not uid!=euid: why disallow
3693 * system("ls") in scripts run from setuid things?
3694 * Or, is this run before we check arguments and set suidscript?
3695 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3696 * (We never have suidscript, can we be sure to have fdscript?)
3697 * Or must then go by UID checks? See comments in forbid_setid also.
3701 /* This is used very early in the lifetime of the program,
3702 * before even the options are parsed, so PL_tainting has
3703 * not been initialized properly. */
3705 Perl_doing_taint(int argc, char *argv[], char *envp[])
3707 #ifndef PERL_IMPLICIT_SYS
3708 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3709 * before we have an interpreter-- and the whole point of this
3710 * function is to be called at such an early stage. If you are on
3711 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3712 * "tainted because running with altered effective ids', you'll
3713 * have to add your own checks somewhere in here. The two most
3714 * known samples of 'implicitness' are Win32 and NetWare, neither
3715 * of which has much of concept of 'uids'. */
3716 int uid = PerlProc_getuid();
3717 int euid = PerlProc_geteuid();
3718 int gid = PerlProc_getgid();
3719 int egid = PerlProc_getegid();
3726 if (uid && (euid != uid || egid != gid))
3728 #endif /* !PERL_IMPLICIT_SYS */
3729 /* This is a really primitive check; environment gets ignored only
3730 * if -T are the first chars together; otherwise one gets
3731 * "Too late" message. */
3732 if ( argc > 1 && argv[1][0] == '-'
3733 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3738 /* Passing the flag as a single char rather than a string is a slight space
3739 optimisation. The only message that isn't /^-.$/ is
3740 "program input from stdin", which is substituted in place of '\0', which
3741 could never be a command line flag. */
3743 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3746 char string[3] = "-x";
3747 const char *message = "program input from stdin";
3754 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3755 if (PL_euid != PL_uid)
3756 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3757 if (PL_egid != PL_gid)
3758 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3759 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3761 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3765 Perl_init_debugger(pTHX)
3768 HV * const ostash = PL_curstash;
3770 PL_curstash = PL_debstash;
3771 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3773 AvREAL_off(PL_dbargs);
3774 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3775 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3776 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3777 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3778 sv_setiv(PL_DBsingle, 0);
3779 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3780 sv_setiv(PL_DBtrace, 0);
3781 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3782 sv_setiv(PL_DBsignal, 0);
3783 PL_curstash = ostash;
3786 #ifndef STRESS_REALLOC
3787 #define REASONABLE(size) (size)
3789 #define REASONABLE(size) (1) /* unreasonable */
3793 Perl_init_stacks(pTHX)
3796 /* start with 128-item stack and 8K cxstack */
3797 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3798 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3799 PL_curstackinfo->si_type = PERLSI_MAIN;
3800 PL_curstack = PL_curstackinfo->si_stack;
3801 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3803 PL_stack_base = AvARRAY(PL_curstack);
3804 PL_stack_sp = PL_stack_base;
3805 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3807 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3810 PL_tmps_max = REASONABLE(128);
3812 Newx(PL_markstack,REASONABLE(32),I32);
3813 PL_markstack_ptr = PL_markstack;
3814 PL_markstack_max = PL_markstack + REASONABLE(32);
3818 Newx(PL_scopestack,REASONABLE(32),I32);
3819 PL_scopestack_ix = 0;
3820 PL_scopestack_max = REASONABLE(32);
3822 Newx(PL_savestack,REASONABLE(128),ANY);
3823 PL_savestack_ix = 0;
3824 PL_savestack_max = REASONABLE(128);
3833 while (PL_curstackinfo->si_next)
3834 PL_curstackinfo = PL_curstackinfo->si_next;
3835 while (PL_curstackinfo) {
3836 PERL_SI *p = PL_curstackinfo->si_prev;
3837 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3838 Safefree(PL_curstackinfo->si_cxstack);
3839 Safefree(PL_curstackinfo);
3840 PL_curstackinfo = p;
3842 Safefree(PL_tmps_stack);
3843 Safefree(PL_markstack);
3844 Safefree(PL_scopestack);
3845 Safefree(PL_savestack);
3850 S_init_predump_symbols(pTHX)
3856 sv_setpvs(get_sv("\"", GV_ADD), " ");
3857 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3859 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3860 GvMULTI_on(PL_stdingv);
3861 io = GvIOp(PL_stdingv);
3862 IoTYPE(io) = IoTYPE_RDONLY;
3863 IoIFP(io) = PerlIO_stdin();
3864 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3866 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3868 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3871 IoTYPE(io) = IoTYPE_WRONLY;
3872 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3874 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3876 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3878 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3879 GvMULTI_on(PL_stderrgv);
3880 io = GvIOp(PL_stderrgv);
3881 IoTYPE(io) = IoTYPE_WRONLY;
3882 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3883 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3885 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3887 PL_statname = newSV(0); /* last filename we did stat on */
3889 Safefree(PL_osname);
3890 PL_osname = savepv(OSNAME);
3894 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3898 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3900 argc--,argv++; /* skip name of script */
3901 if (PL_doswitches) {
3902 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3906 if (argv[0][1] == '-' && !argv[0][2]) {
3910 if ((s = strchr(argv[0], '='))) {
3911 const char *const start_name = argv[0] + 1;
3912 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3913 TRUE, SVt_PV)), s + 1);
3916 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3919 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3920 GvMULTI_on(PL_argvgv);
3921 (void)gv_AVadd(PL_argvgv);
3922 av_clear(GvAVn(PL_argvgv));
3923 for (; argc > 0; argc--,argv++) {
3924 SV * const sv = newSVpv(argv[0],0);
3925 av_push(GvAVn(PL_argvgv),sv);
3926 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3927 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3930 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3931 (void)sv_utf8_decode(sv);
3937 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3942 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3944 PL_toptarget = newSV_type(SVt_PVFM);
3945 sv_setpvs(PL_toptarget, "");
3946 PL_bodytarget = newSV_type(SVt_PVFM);
3947 sv_setpvs(PL_bodytarget, "");
3948 PL_formtarget = PL_bodytarget;
3952 init_argv_symbols(argc,argv);
3954 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3955 sv_setpv(GvSV(tmpgv),PL_origfilename);
3957 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3959 bool env_is_not_environ;
3960 GvMULTI_on(PL_envgv);
3961 hv = GvHVn(PL_envgv);
3962 hv_magic(hv, NULL, PERL_MAGIC_env);
3964 #ifdef USE_ENVIRON_ARRAY
3965 /* Note that if the supplied env parameter is actually a copy
3966 of the global environ then it may now point to free'd memory
3967 if the environment has been modified since. To avoid this
3968 problem we treat env==NULL as meaning 'use the default'
3972 env_is_not_environ = env != environ;
3973 if (env_is_not_environ
3974 # ifdef USE_ITHREADS
3975 && PL_curinterp == aTHX
3984 for (; *env; env++) {
3987 if (!(s = strchr(old_var,'=')) || s == old_var)
3990 #if defined(MSDOS) && !defined(DJGPP)
3992 (void)strupr(old_var);
3995 sv = newSVpv(s+1, 0);
3996 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3997 if (env_is_not_environ)
4001 #endif /* USE_ENVIRON_ARRAY */
4002 #endif /* !PERL_MICRO */
4005 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4006 SvREADONLY_off(GvSV(tmpgv));
4007 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4008 SvREADONLY_on(GvSV(tmpgv));
4010 #ifdef THREADS_HAVE_PIDS
4011 PL_ppid = (IV)getppid();
4014 /* touch @F array to prevent spurious warnings 20020415 MJD */
4016 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4021 S_init_perllib(pTHX)
4025 const char *perl5lib = NULL;
4034 perl5lib = PerlEnv_getenv("PERL5LIB");
4036 * It isn't possible to delete an environment variable with
4037 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4038 * case we treat PERL5LIB as undefined if it has a zero-length value.
4040 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4041 if (perl5lib && *perl5lib != '\0')
4045 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4047 s = PerlEnv_getenv("PERLLIB");
4049 incpush_use_sep(s, 0, 0);
4052 /* Treat PERL5?LIB as a possible search list logical name -- the
4053 * "natural" VMS idiom for a Unix path string. We allow each
4054 * element to be a set of |-separated directories for compatibility.
4058 if (my_trnlnm("PERL5LIB",buf,0))
4060 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4061 } while (my_trnlnm("PERL5LIB",buf,++idx));
4063 while (my_trnlnm("PERLLIB",buf,idx++))
4064 incpush_use_sep(buf, 0, 0);
4069 #ifndef PERL_IS_MINIPERL
4070 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4071 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4073 /* Use the ~-expanded versions of APPLLIB (undocumented),
4074 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4077 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4078 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4082 /* sitearch is always relative to sitelib on Windows for
4083 * DLL-based path intuition to work correctly */
4084 # if !defined(WIN32)
4085 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4086 INCPUSH_CAN_RELOCATE);
4092 /* this picks up sitearch as well */
4093 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4095 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4097 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4101 #ifdef PERL_VENDORARCH_EXP
4102 /* vendorarch is always relative to vendorlib on Windows for
4103 * DLL-based path intuition to work correctly */
4104 # if !defined(WIN32)
4105 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4106 INCPUSH_CAN_RELOCATE);
4110 #ifdef PERL_VENDORLIB_EXP
4112 /* this picks up vendorarch as well */
4113 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4115 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4117 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4118 INCPUSH_CAN_RELOCATE);
4123 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4127 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4131 s = win32_get_privlib(PERL_FS_VERSION, &len);
4133 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4136 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4138 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4142 #ifdef PERL_OTHERLIBDIRS
4143 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4144 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4145 |INCPUSH_CAN_RELOCATE);
4151 * It isn't possible to delete an environment variable with
4152 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4153 * case we treat PERL5LIB as undefined if it has a zero-length value.
4155 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4156 if (perl5lib && *perl5lib != '\0')
4160 incpush_use_sep(perl5lib, 0,
4161 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4163 /* Treat PERL5?LIB as a possible search list logical name -- the
4164 * "natural" VMS idiom for a Unix path string. We allow each
4165 * element to be a set of |-separated directories for compatibility.
4169 if (my_trnlnm("PERL5LIB",buf,0))
4171 incpush_use_sep(buf, 0,
4172 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4173 } while (my_trnlnm("PERL5LIB",buf,++idx));
4177 /* Use the ~-expanded versions of APPLLIB (undocumented),
4178 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4181 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4182 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4185 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4186 /* Search for version-specific dirs below here */
4187 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4188 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4192 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4193 /* Search for version-specific dirs below here */
4194 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4195 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4198 #ifdef PERL_OTHERLIBDIRS
4199 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4200 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4201 |INCPUSH_CAN_RELOCATE);
4203 #endif /* !PERL_IS_MINIPERL */
4206 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4209 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4210 # define PERLLIB_SEP ';'
4213 # define PERLLIB_SEP '|'
4215 # define PERLLIB_SEP ':'
4218 #ifndef PERLLIB_MANGLE
4219 # define PERLLIB_MANGLE(s,n) (s)
4222 /* Push a directory onto @INC if it exists.
4223 Generate a new SV if we do this, to save needing to copy the SV we push
4226 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4231 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4233 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4234 S_ISDIR(tmpstatbuf.st_mode)) {
4236 dir = newSVsv(stem);
4238 /* Truncate dir back to stem. */
4239 SvCUR_set(dir, SvCUR(stem));
4245 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4248 const U8 using_sub_dirs
4249 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4250 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4251 const U8 add_versioned_sub_dirs
4252 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4253 const U8 add_archonly_sub_dirs
4254 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4255 #ifdef PERL_INC_VERSION_LIST
4256 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4258 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4259 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4260 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4261 AV *const inc = GvAVn(PL_incgv);
4263 PERL_ARGS_ASSERT_INCPUSH;
4266 /* Could remove this vestigial extra block, if we don't mind a lot of
4267 re-indenting diff noise. */
4270 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4271 arranged to unshift #! line -I onto the front of @INC. However,
4272 -I can add version and architecture specific libraries, and they
4273 need to go first. The old code assumed that it was always
4274 pushing. Hence to make it work, need to push the architecture
4275 (etc) libraries onto a temporary array, then "unshift" that onto
4276 the front of @INC. */
4277 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4280 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4281 defined to so something (in os2/os2.c), but the code has been
4282 this way, ignoring any possible changed of length, since
4283 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4285 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4287 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4290 /* Do the if() outside the #ifdef to avoid warnings about an unused
4293 #ifdef PERL_RELOCATABLE_INC
4295 * Relocatable include entries are marked with a leading .../
4298 * 0: Remove that leading ".../"
4299 * 1: Remove trailing executable name (anything after the last '/')
4300 * from the perl path to give a perl prefix
4302 * While the @INC element starts "../" and the prefix ends with a real
4303 * directory (ie not . or ..) chop that real directory off the prefix
4304 * and the leading "../" from the @INC element. ie a logical "../"
4306 * Finally concatenate the prefix and the remainder of the @INC element
4307 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4308 * generates /usr/local/lib/perl5
4310 const char *libpath = SvPVX(libdir);
4311 STRLEN libpath_len = SvCUR(libdir);
4312 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4314 SV * const caret_X = get_sv("\030", 0);
4315 /* Going to use the SV just as a scratch buffer holding a C
4321 /* $^X is *the* source of taint if tainting is on, hence
4322 SvPOK() won't be true. */
4324 assert(SvPOKp(caret_X));
4325 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4327 /* Firstly take off the leading .../
4328 If all else fail we'll do the paths relative to the current
4330 sv_chop(libdir, libpath + 4);
4331 /* Don't use SvPV as we're intentionally bypassing taining,
4332 mortal copies that the mg_get of tainting creates, and
4333 corruption that seems to come via the save stack.
4334 I guess that the save stack isn't correctly set up yet. */
4335 libpath = SvPVX(libdir);
4336 libpath_len = SvCUR(libdir);
4338 /* This would work more efficiently with memrchr, but as it's
4339 only a GNU extension we'd need to probe for it and
4340 implement our own. Not hard, but maybe not worth it? */
4342 prefix = SvPVX(prefix_sv);
4343 lastslash = strrchr(prefix, '/');
4345 /* First time in with the *lastslash = '\0' we just wipe off
4346 the trailing /perl from (say) /usr/foo/bin/perl
4350 while ((*lastslash = '\0'), /* Do that, come what may. */
4351 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4352 && (lastslash = strrchr(prefix, '/')))) {
4353 if (lastslash[1] == '\0'
4354 || (lastslash[1] == '.'
4355 && (lastslash[2] == '/' /* ends "/." */
4356 || (lastslash[2] == '/'
4357 && lastslash[3] == '/' /* or "/.." */
4359 /* Prefix ends "/" or "/." or "/..", any of which
4360 are fishy, so don't do any more logical cleanup.
4364 /* Remove leading "../" from path */
4367 /* Next iteration round the loop removes the last
4368 directory name from prefix by writing a '\0' in
4369 the while clause. */
4371 /* prefix has been terminated with a '\0' to the correct
4372 length. libpath points somewhere into the libdir SV.
4373 We need to join the 2 with '/' and drop the result into
4375 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4376 SvREFCNT_dec(libdir);
4377 /* And this is the new libdir. */
4380 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4381 /* Need to taint reloccated paths if running set ID */
4382 SvTAINTED_on(libdir);
4385 SvREFCNT_dec(prefix_sv);
4390 * BEFORE pushing libdir onto @INC we may first push version- and
4391 * archname-specific sub-directories.
4393 if (using_sub_dirs) {
4395 #ifdef PERL_INC_VERSION_LIST
4396 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4397 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4398 const char * const *incver;
4405 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4407 while (unix[len-1] == '/') len--; /* Cosmetic */
4408 sv_usepvn(libdir,unix,len);
4411 PerlIO_printf(Perl_error_log,
4412 "Failed to unixify @INC element \"%s\"\n",
4416 subdir = newSVsv(libdir);
4418 if (add_versioned_sub_dirs) {
4419 /* .../version/archname if -d .../version/archname */
4420 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4421 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4423 /* .../version if -d .../version */
4424 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4425 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4428 #ifdef PERL_INC_VERSION_LIST
4430 for (incver = incverlist; *incver; incver++) {
4431 /* .../xxx if -d .../xxx */
4432 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4433 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4438 if (add_archonly_sub_dirs) {
4439 /* .../archname if -d .../archname */
4440 sv_catpvs(subdir, "/" ARCHNAME);
4441 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4445 assert (SvREFCNT(subdir) == 1);
4446 SvREFCNT_dec(subdir);
4449 /* finally add this lib directory at the end of @INC */
4451 U32 extra = av_len(av) + 1;
4452 av_unshift(inc, extra + push_basedir);
4454 av_store(inc, extra, libdir);
4456 /* av owns a reference, av_store() expects to be donated a
4457 reference, and av expects to be sane when it's cleared.
4458 If I wanted to be naughty and wrong, I could peek inside the
4459 implementation of av_clear(), realise that it uses
4460 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4461 and so directly steal from it (with a memcpy() to inc, and
4462 then memset() to NULL them out. But people copy code from the
4463 core expecting it to be best practise, so let's use the API.
4464 Although studious readers will note that I'm not checking any
4466 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4470 else if (push_basedir) {
4471 av_push(inc, libdir);
4474 if (!push_basedir) {
4475 assert (SvREFCNT(libdir) == 1);
4476 SvREFCNT_dec(libdir);
4482 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4486 /* This logic has been broken out from S_incpush(). It may be possible to
4489 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4496 /* Break at all separators */
4497 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4499 /* skip any consecutive separators */
4501 /* Uncomment the next line for PATH semantics */
4502 /* But you'll need to write tests */
4503 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4505 incpush(p, (STRLEN)(s - p), flags);
4510 incpush(p, (STRLEN)(end - p), flags);
4515 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4519 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4525 PERL_ARGS_ASSERT_CALL_LIST;
4527 while (av_len(paramList) >= 0) {
4528 cv = MUTABLE_CV(av_shift(paramList));
4530 if (paramList == PL_beginav) {
4531 /* save PL_beginav for compiler */
4532 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4534 else if (paramList == PL_checkav) {
4535 /* save PL_checkav for compiler */
4536 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4538 else if (paramList == PL_unitcheckav) {
4539 /* save PL_unitcheckav for compiler */
4540 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4551 PL_madskills |= 16384;
4556 PL_madskills &= ~16384;
4559 (void)SvPV_const(atsv, len);
4561 PL_curcop = &PL_compiling;
4562 CopLINE_set(PL_curcop, oldline);
4563 if (paramList == PL_beginav)
4564 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4566 Perl_sv_catpvf(aTHX_ atsv,
4567 "%s failed--call queue aborted",
4568 paramList == PL_checkav ? "CHECK"
4569 : paramList == PL_initav ? "INIT"
4570 : paramList == PL_unitcheckav ? "UNITCHECK"
4572 while (PL_scopestack_ix > oldscope)
4575 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4582 /* my_exit() was called */
4583 while (PL_scopestack_ix > oldscope)
4586 PL_curstash = PL_defstash;
4587 PL_curcop = &PL_compiling;
4588 CopLINE_set(PL_curcop, oldline);
4590 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4591 if (paramList == PL_beginav)
4592 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4594 Perl_croak(aTHX_ "%s failed--call queue aborted",
4595 paramList == PL_checkav ? "CHECK"
4596 : paramList == PL_initav ? "INIT"
4597 : paramList == PL_unitcheckav ? "UNITCHECK"
4604 PL_curcop = &PL_compiling;
4605 CopLINE_set(PL_curcop, oldline);
4608 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4617 Perl_my_exit(pTHX_ U32 status)
4628 STATUS_EXIT_SET(status);
4635 Perl_my_failure_exit(pTHX)
4639 /* We have been called to fall on our sword. The desired exit code
4640 * should be already set in STATUS_UNIX, but could be shifted over
4641 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4644 * If an error code has not been set, then force the issue.
4646 if (MY_POSIX_EXIT) {
4648 /* According to the die_exit.t tests, if errno is non-zero */
4649 /* It should be used for the error status. */
4651 if (errno == EVMSERR) {
4652 STATUS_NATIVE = vaxc$errno;
4655 /* According to die_exit.t tests, if the child_exit code is */
4656 /* also zero, then we need to exit with a code of 255 */
4657 if ((errno != 0) && (errno < 256))
4658 STATUS_UNIX_EXIT_SET(errno);
4659 else if (STATUS_UNIX < 255) {
4660 STATUS_UNIX_EXIT_SET(255);
4665 /* The exit code could have been set by $? or vmsish which
4666 * means that it may not have fatal set. So convert
4667 * success/warning codes to fatal with out changing
4668 * the POSIX status code. The severity makes VMS native
4669 * status handling work, while UNIX mode programs use the
4670 * the POSIX exit codes.
4672 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4673 STATUS_NATIVE &= STS$M_COND_ID;
4674 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4678 /* Traditionally Perl on VMS always expects a Fatal Error. */
4679 if (vaxc$errno & 1) {
4681 /* So force success status to failure */
4682 if (STATUS_NATIVE & 1)
4687 STATUS_UNIX = EINTR; /* In case something cares */
4692 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4694 /* Encode the severity code */
4695 severity = STATUS_NATIVE & STS$M_SEVERITY;
4696 STATUS_UNIX = (severity ? severity : 1) << 8;
4698 /* Perl expects this to be a fatal error */
4699 if (severity != STS$K_SEVERE)
4708 STATUS_UNIX_SET(errno);
4710 exitstatus = STATUS_UNIX >> 8;
4711 if (exitstatus & 255)
4712 STATUS_UNIX_SET(exitstatus);
4714 STATUS_UNIX_SET(255);
4721 S_my_exit_jump(pTHX)
4726 SvREFCNT_dec(PL_e_script);
4730 POPSTACK_TO(PL_mainstack);
4738 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4741 const char * const p = SvPVX_const(PL_e_script);
4742 const char *nl = strchr(p, '\n');
4744 PERL_UNUSED_ARG(idx);
4745 PERL_UNUSED_ARG(maxlen);
4747 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4749 filter_del(read_e_script);
4752 sv_catpvn(buf_sv, p, nl-p);
4753 sv_chop(PL_e_script, nl);
4759 * c-indentation-style: bsd
4761 * indent-tabs-mode: t
4764 * ex: set ts=8 sts=4 sw=4 noet: