4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * by Larry Wall and others
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
27 #ifdef PERL_IS_MINIPERL
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 #ifdef USE_KERN_PROC_PATHNAME
42 # include <sys/sysctl.h>
45 #ifdef USE_NSGETEXECUTABLEPATH
46 # include <mach-o/dyld.h>
49 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
56 char control[CMSG_SPACE(sizeof(int))];
73 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
74 char *getenv (char *); /* Usually in <stdlib.h> */
77 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
79 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
80 /* Drop everything. Heck, don't even try to call it */
81 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
83 /* Drop almost everything */
84 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
109 MUTEX_INIT(&PL_dollarzero_mutex);
110 MUTEX_INIT(&PL_my_ctx_mutex);
113 #if defined(USE_ITHREADS)
116 /* This always happens for non-ithreads */
119 PERL_SET_THX(my_perl);
124 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
127 Perl_sys_init(int* argc, char*** argv)
131 PERL_ARGS_ASSERT_SYS_INIT;
133 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
134 PERL_UNUSED_ARG(argv);
135 PERL_SYS_INIT_BODY(argc, argv);
139 Perl_sys_init3(int* argc, char*** argv, char*** env)
143 PERL_ARGS_ASSERT_SYS_INIT3;
145 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
146 PERL_UNUSED_ARG(argv);
147 PERL_UNUSED_ARG(env);
148 PERL_SYS_INIT3_BODY(argc, argv, env);
155 if (!PL_veto_cleanup) {
156 PERL_SYS_TERM_BODY();
161 #ifdef PERL_IMPLICIT_SYS
163 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
164 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
165 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
166 struct IPerlDir* ipD, struct IPerlSock* ipS,
167 struct IPerlProc* ipP)
169 PerlInterpreter *my_perl;
171 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
173 /* Newx() needs interpreter, so call malloc() instead */
174 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
175 S_init_tls_and_interp(my_perl);
176 Zero(my_perl, 1, PerlInterpreter);
186 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
193 =head1 Embedding Functions
195 =for apidoc perl_alloc
197 Allocates a new Perl interpreter. See L<perlembed>.
205 PerlInterpreter *my_perl;
207 /* Newx() needs interpreter, so call malloc() instead */
208 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
210 S_init_tls_and_interp(my_perl);
211 #ifndef PERL_TRACK_MEMPOOL
212 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
214 Zero(my_perl, 1, PerlInterpreter);
215 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
219 #endif /* PERL_IMPLICIT_SYS */
222 =for apidoc perl_construct
224 Initializes a new Perl interpreter. See L<perlembed>.
230 perl_construct(pTHXx)
234 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
238 PL_perl_destruct_level = 1;
240 PERL_UNUSED_ARG(my_perl);
241 if (PL_perl_destruct_level > 0)
244 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
246 /* set read-only and try to insure than we wont see REFCNT==0
249 SvREADONLY_on(&PL_sv_undef);
250 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
252 sv_setpv(&PL_sv_no,PL_No);
253 /* value lookup in void context - happens to have the side effect
254 of caching the numeric forms. However, as &PL_sv_no doesn't contain
255 a string that is a valid numer, we have to turn the public flags by
261 SvREADONLY_on(&PL_sv_no);
262 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
264 sv_setpv(&PL_sv_yes,PL_Yes);
267 SvREADONLY_on(&PL_sv_yes);
268 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
270 SvREADONLY_on(&PL_sv_placeholder);
271 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
273 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
274 #ifdef PERL_USES_PL_PIDSTATUS
275 PL_pidstatus = newHV();
278 PL_rs = newSVpvs("\n");
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
304 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
305 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
307 /* First entry is a list of empty elements. It needs to be initialised
308 else all hell breaks loose in S_find_uninit_var(). */
309 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
310 PL_regex_pad = AvARRAY(PL_regex_padav);
312 #ifdef USE_REENTRANT_API
313 Perl_reentrant_init(aTHX);
316 /* Note that strtab is a rather special HV. Assumptions are made
317 about not iterating on it, and not adding tie magic to it.
318 It is properly deallocated in perl_destruct() */
321 HvSHAREKEYS_off(PL_strtab); /* mandatory */
322 hv_ksplit(PL_strtab, 512);
324 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
325 _dyld_lookup_and_bind
326 ("__environ", (unsigned long *) &environ_pointer, NULL);
330 # ifdef USE_ENVIRON_ARRAY
331 PL_origenviron = environ;
335 /* Use sysconf(_SC_CLK_TCK) if available, if not
336 * available or if the sysconf() fails, use the HZ.
337 * BeOS has those, but returns the wrong value.
338 * The HZ if not originally defined has been by now
339 * been defined as CLK_TCK, if available. */
340 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
341 PL_clocktick = sysconf(_SC_CLK_TCK);
342 if (PL_clocktick <= 0)
346 PL_stashcache = newHV();
348 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
349 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
395 PL_registered_mros = newHV();
396 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
397 HvMAX(PL_registered_mros) = 0;
403 =for apidoc nothreadhook
405 Stub that provides thread hook for perl_destruct when there are
412 Perl_nothreadhook(pTHX)
418 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
420 Perl_dump_sv_child(pTHX_ SV *sv)
423 const int sock = PL_dumper_fd;
424 const int debug_fd = PerlIO_fileno(Perl_debug_log);
425 union control_un control;
428 struct cmsghdr *cmptr;
430 unsigned char buffer[256];
432 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
434 if(sock == -1 || debug_fd == -1)
437 PerlIO_flush(Perl_debug_log);
439 /* All these shenanigans are to pass a file descriptor over to our child for
440 it to dump out to. We can't let it hold open the file descriptor when it
441 forks, as the file descriptor it will dump to can turn out to be one end
442 of pipe that some other process will wait on for EOF. (So as it would
443 be open, the wait would be forever.) */
445 msg.msg_control = control.control;
446 msg.msg_controllen = sizeof(control.control);
447 /* We're a connected socket so we don't need a destination */
453 cmptr = CMSG_FIRSTHDR(&msg);
454 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
455 cmptr->cmsg_level = SOL_SOCKET;
456 cmptr->cmsg_type = SCM_RIGHTS;
457 *((int *)CMSG_DATA(cmptr)) = 1;
459 vec[0].iov_base = (void*)&sv;
460 vec[0].iov_len = sizeof(sv);
461 got = sendmsg(sock, &msg, 0);
464 perror("Debug leaking scalars parent sendmsg failed");
467 if(got < sizeof(sv)) {
468 perror("Debug leaking scalars parent short sendmsg");
472 /* Return protocol is
474 unsigned char: length of location string (0 for empty)
475 unsigned char*: string (not terminated)
477 vec[0].iov_base = (void*)&returned_errno;
478 vec[0].iov_len = sizeof(returned_errno);
479 vec[1].iov_base = buffer;
482 got = readv(sock, vec, 2);
485 perror("Debug leaking scalars parent read failed");
486 PerlIO_flush(PerlIO_stderr());
489 if(got < sizeof(returned_errno) + 1) {
490 perror("Debug leaking scalars parent short read");
491 PerlIO_flush(PerlIO_stderr());
496 got = read(sock, buffer + 1, *buffer);
498 perror("Debug leaking scalars parent read 2 failed");
499 PerlIO_flush(PerlIO_stderr());
504 perror("Debug leaking scalars parent short read 2");
505 PerlIO_flush(PerlIO_stderr());
510 if (returned_errno || *buffer) {
511 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
512 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
513 returned_errno, strerror(returned_errno));
519 =for apidoc perl_destruct
521 Shuts down a Perl interpreter. See L<perlembed>.
530 VOL signed char destruct_level; /* see possible values in intrpvar.h */
532 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
536 PERL_ARGS_ASSERT_PERL_DESTRUCT;
538 PERL_UNUSED_ARG(my_perl);
541 assert(PL_scopestack_ix == 1);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c) {
565 PERL_SET_PHASE(PERL_PHASE_END);
566 call_list(PL_scopestack_ix, PL_endav);
572 assert(PL_scopestack_ix == 0);
574 /* Need to flush since END blocks can produce output */
577 if (PL_threadhook(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1] = {0};
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 /* note that PL_main_cv isn't usually actually freed at this point,
755 * due to the CvOUTSIDE refs from subs compiled within it. It will
756 * get freed once all the subs are freed in sv_clean_all(), for
757 * destruct_level > 0 */
758 SvREFCNT_dec(PL_main_cv);
760 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
779 /* unhook hooks which will soon be, or use, destroyed data */
780 SvREFCNT_dec(PL_warnhook);
782 SvREFCNT_dec(PL_diehook);
785 /* call exit list functions */
786 while (PL_exitlistlen-- > 0)
787 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
789 Safefree(PL_exitlist);
794 SvREFCNT_dec(PL_registered_mros);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
839 /* the syntax tree is shared between clones
840 * so op_free(PL_main_root) only ReREFCNT_dec's
841 * REGEXPs in the parent interpreter
842 * we need to manually ReREFCNT_dec for the clones
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
854 /* XXX can PL_parser still be non-null here? */
855 if(PL_parser && PL_parser->rsfp) {
856 (void)PerlIO_close(PL_parser->rsfp);
857 PL_parser->rsfp = NULL;
861 Safefree(PL_splitstr);
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_apiversion);
882 SvREFCNT_dec(PL_e_script);
888 /* magical thingies */
890 SvREFCNT_dec(PL_ofsgv); /* *, */
893 SvREFCNT_dec(PL_ors_sv); /* $\ */
896 SvREFCNT_dec(PL_rs); /* $/ */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
909 Safefree(PL_efloatbuf);
913 /* startup and shutdown function lists */
914 SvREFCNT_dec(PL_beginav);
915 SvREFCNT_dec(PL_beginav_save);
916 SvREFCNT_dec(PL_endav);
917 SvREFCNT_dec(PL_checkav);
918 SvREFCNT_dec(PL_checkav_save);
919 SvREFCNT_dec(PL_unitcheckav);
920 SvREFCNT_dec(PL_unitcheckav_save);
921 SvREFCNT_dec(PL_initav);
923 PL_beginav_save = NULL;
926 PL_checkav_save = NULL;
927 PL_unitcheckav = NULL;
928 PL_unitcheckav_save = NULL;
931 /* shortcuts just get cleared */
940 PL_last_in_gv = NULL;
952 SvREFCNT_dec(PL_argvout_stack);
953 PL_argvout_stack = NULL;
955 SvREFCNT_dec(PL_modglobal);
957 SvREFCNT_dec(PL_preambleav);
958 PL_preambleav = NULL;
959 SvREFCNT_dec(PL_subname);
961 #ifdef PERL_USES_PL_PIDSTATUS
962 SvREFCNT_dec(PL_pidstatus);
965 SvREFCNT_dec(PL_toptarget);
967 SvREFCNT_dec(PL_bodytarget);
968 PL_bodytarget = NULL;
969 PL_formtarget = NULL;
971 /* free locale stuff */
972 #ifdef USE_LOCALE_COLLATE
973 Safefree(PL_collation_name);
974 PL_collation_name = NULL;
977 #ifdef USE_LOCALE_NUMERIC
978 Safefree(PL_numeric_name);
979 PL_numeric_name = NULL;
980 SvREFCNT_dec(PL_numeric_radix_sv);
981 PL_numeric_radix_sv = NULL;
984 /* clear utf8 character classes */
985 SvREFCNT_dec(PL_utf8_alnum);
986 SvREFCNT_dec(PL_utf8_alpha);
987 SvREFCNT_dec(PL_utf8_space);
988 SvREFCNT_dec(PL_utf8_graph);
989 SvREFCNT_dec(PL_utf8_digit);
990 SvREFCNT_dec(PL_utf8_upper);
991 SvREFCNT_dec(PL_utf8_lower);
992 SvREFCNT_dec(PL_utf8_print);
993 SvREFCNT_dec(PL_utf8_punct);
994 SvREFCNT_dec(PL_utf8_xdigit);
995 SvREFCNT_dec(PL_utf8_mark);
996 SvREFCNT_dec(PL_utf8_toupper);
997 SvREFCNT_dec(PL_utf8_totitle);
998 SvREFCNT_dec(PL_utf8_tolower);
999 SvREFCNT_dec(PL_utf8_tofold);
1000 SvREFCNT_dec(PL_utf8_idstart);
1001 SvREFCNT_dec(PL_utf8_idcont);
1002 SvREFCNT_dec(PL_utf8_foldclosures);
1003 PL_utf8_alnum = NULL;
1004 PL_utf8_alpha = NULL;
1005 PL_utf8_space = NULL;
1006 PL_utf8_graph = NULL;
1007 PL_utf8_digit = NULL;
1008 PL_utf8_upper = NULL;
1009 PL_utf8_lower = NULL;
1010 PL_utf8_print = NULL;
1011 PL_utf8_punct = NULL;
1012 PL_utf8_xdigit = NULL;
1013 PL_utf8_mark = NULL;
1014 PL_utf8_toupper = NULL;
1015 PL_utf8_totitle = NULL;
1016 PL_utf8_tolower = NULL;
1017 PL_utf8_tofold = NULL;
1018 PL_utf8_idstart = NULL;
1019 PL_utf8_idcont = NULL;
1020 PL_utf8_foldclosures = NULL;
1022 if (!specialWARN(PL_compiling.cop_warnings))
1023 PerlMemShared_free(PL_compiling.cop_warnings);
1024 PL_compiling.cop_warnings = NULL;
1025 cophh_free(CopHINTHASH_get(&PL_compiling));
1026 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1027 CopFILE_free(&PL_compiling);
1028 CopSTASH_free(&PL_compiling);
1030 /* Prepare to destruct main symbol table. */
1033 /* break ref loop *:: <=> %:: */
1034 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1037 SvREFCNT_dec(PL_curstname);
1038 PL_curstname = NULL;
1040 /* clear queued errors */
1041 SvREFCNT_dec(PL_errors);
1044 SvREFCNT_dec(PL_isarev);
1047 if (destruct_level >= 2) {
1048 if (PL_scopestack_ix != 0)
1049 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1050 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1051 (long)PL_scopestack_ix);
1052 if (PL_savestack_ix != 0)
1053 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1054 "Unbalanced saves: %ld more saves than restores\n",
1055 (long)PL_savestack_ix);
1056 if (PL_tmps_floor != -1)
1057 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1058 (long)PL_tmps_floor + 1);
1059 if (cxstack_ix != -1)
1060 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1061 (long)cxstack_ix + 1);
1064 #ifdef PERL_IMPLICIT_CONTEXT
1065 /* the entries in this list are allocated via SV PVX's, so get freed
1066 * in sv_clean_all */
1067 Safefree(PL_my_cxt_list);
1070 /* Now absolutely destruct everything, somehow or other, loops or no. */
1072 /* the 2 is for PL_fdpid and PL_strtab */
1073 while (sv_clean_all() > 2)
1076 AvREAL_off(PL_fdpid); /* no surviving entries */
1077 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1080 #ifdef HAVE_INTERP_INTERN
1084 /* Destruct the global string table. */
1086 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1087 * so that sv_free() won't fail on them.
1088 * Now that the global string table is using a single hunk of memory
1089 * for both HE and HEK, we either need to explicitly unshare it the
1090 * correct way, or actually free things here.
1093 const I32 max = HvMAX(PL_strtab);
1094 HE * const * const array = HvARRAY(PL_strtab);
1095 HE *hent = array[0];
1098 if (hent && ckWARN_d(WARN_INTERNAL)) {
1099 HE * const next = HeNEXT(hent);
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1101 "Unbalanced string table refcount: (%ld) for \"%s\"",
1102 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1109 hent = array[riter];
1114 HvARRAY(PL_strtab) = 0;
1115 HvTOTALKEYS(PL_strtab) = 0;
1117 SvREFCNT_dec(PL_strtab);
1120 /* free the pointer tables used for cloning */
1121 ptr_table_free(PL_ptr_table);
1122 PL_ptr_table = (PTR_TBL_t*)NULL;
1125 /* free special SVs */
1127 SvREFCNT(&PL_sv_yes) = 0;
1128 sv_clear(&PL_sv_yes);
1129 SvANY(&PL_sv_yes) = NULL;
1130 SvFLAGS(&PL_sv_yes) = 0;
1132 SvREFCNT(&PL_sv_no) = 0;
1133 sv_clear(&PL_sv_no);
1134 SvANY(&PL_sv_no) = NULL;
1135 SvFLAGS(&PL_sv_no) = 0;
1139 for (i=0; i<=2; i++) {
1140 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1141 sv_clear(PERL_DEBUG_PAD(i));
1142 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1143 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1147 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1148 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1150 #ifdef DEBUG_LEAKING_SCALARS
1151 if (PL_sv_count != 0) {
1156 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1157 svend = &sva[SvREFCNT(sva)];
1158 for (sv = sva + 1; sv < svend; ++sv) {
1159 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1160 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1162 " refcnt=%"UVuf pTHX__FORMAT "\n"
1163 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1165 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1167 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1169 sv->sv_debug_inpad ? "for" : "by",
1170 sv->sv_debug_optype ?
1171 PL_op_name[sv->sv_debug_optype]: "(none)",
1172 PTR2UV(sv->sv_debug_parent),
1175 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 Perl_dump_sv_child(aTHX_ sv);
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1186 /* Wait for up to 4 seconds for child to terminate.
1187 This seems to be the least effort way of timing out on reaping
1189 struct timeval waitfor = {4, 0};
1190 int sock = PL_dumper_fd;
1194 FD_SET(sock, &rset);
1195 select(sock + 1, &rset, NULL, NULL, &waitfor);
1196 waitpid(child, &status, WNOHANG);
1201 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1207 #ifdef PERL_DEBUG_READONLY_OPS
1213 #if defined(PERLIO_LAYERS)
1214 /* No more IO - including error messages ! */
1215 PerlIO_cleanup(aTHX);
1218 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1219 as currently layers use it rather than NULL as a marker
1220 for no arg - and will try and SvREFCNT_dec it.
1222 SvREFCNT(&PL_sv_undef) = 0;
1223 SvREADONLY_off(&PL_sv_undef);
1225 Safefree(PL_origfilename);
1226 PL_origfilename = NULL;
1227 Safefree(PL_reg_start_tmp);
1228 PL_reg_start_tmp = (char**)NULL;
1229 PL_reg_start_tmpl = 0;
1230 Safefree(PL_reg_curpm);
1231 Safefree(PL_reg_poscache);
1232 free_tied_hv_pool();
1233 Safefree(PL_op_mask);
1234 Safefree(PL_psig_name);
1235 PL_psig_name = (SV**)NULL;
1236 PL_psig_ptr = (SV**)NULL;
1238 /* We need to NULL PL_psig_pend first, so that
1239 signal handlers know not to use it */
1240 int *psig_save = PL_psig_pend;
1241 PL_psig_pend = (int*)NULL;
1242 Safefree(psig_save);
1246 PL_tainting = FALSE;
1247 PL_taint_warn = FALSE;
1248 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1251 DEBUG_P(debprofdump());
1253 #ifdef USE_REENTRANT_API
1254 Perl_reentrant_free(aTHX);
1259 while (PL_regmatch_slab) {
1260 regmatch_slab *s = PL_regmatch_slab;
1261 PL_regmatch_slab = PL_regmatch_slab->next;
1265 /* As the absolutely last thing, free the non-arena SV for mess() */
1268 /* we know that type == SVt_PVMG */
1270 /* it could have accumulated taint magic */
1273 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1274 moremagic = mg->mg_moremagic;
1275 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1277 Safefree(mg->mg_ptr);
1281 /* we know that type >= SVt_PV */
1282 SvPV_free(PL_mess_sv);
1283 Safefree(SvANY(PL_mess_sv));
1284 Safefree(PL_mess_sv);
1291 =for apidoc perl_free
1293 Releases a Perl interpreter. See L<perlembed>.
1303 PERL_ARGS_ASSERT_PERL_FREE;
1305 if (PL_veto_cleanup)
1308 #ifdef PERL_TRACK_MEMPOOL
1311 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1312 * value as we're probably hunting memory leaks then
1314 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1315 if (!s || atoi(s) == 0) {
1316 const U32 old_debug = PL_debug;
1317 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1318 thread at thread exit. */
1320 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1321 "free this thread's memory\n");
1322 PL_debug &= ~ DEBUG_m_FLAG;
1324 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1325 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1326 PL_debug = old_debug;
1331 #if defined(WIN32) || defined(NETWARE)
1332 # if defined(PERL_IMPLICIT_SYS)
1335 void *host = nw_internal_host;
1337 void *host = w32_internal_host;
1339 PerlMem_free(aTHXx);
1341 nw_delete_internal_host(host);
1343 win32_delete_internal_host(host);
1347 PerlMem_free(aTHXx);
1350 PerlMem_free(aTHXx);
1354 #if defined(USE_ITHREADS)
1355 /* provide destructors to clean up the thread key when libperl is unloaded */
1356 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1358 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1359 #pragma fini "perl_fini"
1360 #elif defined(__sun) && !defined(__GNUC__)
1361 #pragma fini (perl_fini)
1365 #if defined(__GNUC__)
1366 __attribute__((destructor))
1371 if (PL_curinterp && !PL_veto_cleanup)
1376 #endif /* THREADS */
1379 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1382 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1383 PL_exitlist[PL_exitlistlen].fn = fn;
1384 PL_exitlist[PL_exitlistlen].ptr = ptr;
1389 S_set_caret_X(pTHX) {
1391 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1393 SV *const caret_x = GvSV(tmpgv);
1395 sv_setpv(caret_x, os2_execname(aTHX));
1397 # ifdef USE_KERN_PROC_PATHNAME
1402 mib[2] = KERN_PROC_PATHNAME;
1405 if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
1406 && size > 0 && size < MAXPATHLEN * MAXPATHLEN) {
1407 sv_grow(caret_x, size);
1409 if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
1411 SvPOK_only(caret_x);
1412 SvCUR_set(caret_x, size - 1);
1417 # elif defined(USE_NSGETEXECUTABLEPATH)
1419 uint32_t size = sizeof(buf);
1421 _NSGetExecutablePath(buf, &size);
1422 if (size < MAXPATHLEN * MAXPATHLEN) {
1423 sv_grow(caret_x, size);
1424 if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
1425 char *const tidied = realpath(SvPVX(caret_x), NULL);
1427 sv_setpv(caret_x, tidied);
1430 SvPOK_only(caret_x);
1431 SvCUR_set(caret_x, size);
1436 # elif defined(HAS_PROCSELFEXE)
1437 char buf[MAXPATHLEN];
1438 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1440 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1441 includes a spurious NUL which will cause $^X to fail in system
1442 or backticks (this will prevent extensions from being built and
1443 many tests from working). readlink is not meant to add a NUL.
1444 Normal readlink works fine.
1446 if (len > 0 && buf[len-1] == '\0') {
1450 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1451 returning the text "unknown" from the readlink rather than the path
1452 to the executable (or returning an error from the readlink). Any
1453 valid path has a '/' in it somewhere, so use that to validate the
1454 result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1456 if (len > 0 && memchr(buf, '/', len)) {
1457 sv_setpvn(caret_x, buf, len);
1461 /* Fallback to this: */
1462 sv_setpv(caret_x, PL_origargv[0]);
1468 =for apidoc perl_parse
1470 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1475 #define SET_CURSTASH(newstash) \
1476 if (PL_curstash != newstash) { \
1477 SvREFCNT_dec(PL_curstash); \
1478 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1482 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1489 PERL_ARGS_ASSERT_PERL_PARSE;
1490 #ifndef MULTIPLICITY
1491 PERL_UNUSED_ARG(my_perl);
1494 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1495 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1496 * This MUST be done before any hash stores or fetches take place.
1497 * If you set PL_rehash_seed (and presumably also PL_rehash_seed_set)
1498 * yourself, it is your responsibility to provide a good random seed!
1499 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1500 if (!PL_rehash_seed_set)
1501 PL_rehash_seed = get_hash_seed();
1503 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1505 if (s && (atoi(s) == 1))
1506 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1508 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1513 if (PL_origalen != 0) {
1514 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1517 /* Set PL_origalen be the sum of the contiguous argv[]
1518 * elements plus the size of the env in case that it is
1519 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1520 * as the maximum modifiable length of $0. In the worst case
1521 * the area we are able to modify is limited to the size of
1522 * the original argv[0]. (See below for 'contiguous', though.)
1524 const char *s = NULL;
1527 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1528 /* Do the mask check only if the args seem like aligned. */
1530 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1532 /* See if all the arguments are contiguous in memory. Note
1533 * that 'contiguous' is a loose term because some platforms
1534 * align the argv[] and the envp[]. If the arguments look
1535 * like non-aligned, assume that they are 'strictly' or
1536 * 'traditionally' contiguous. If the arguments look like
1537 * aligned, we just check that they are within aligned
1538 * PTRSIZE bytes. As long as no system has something bizarre
1539 * like the argv[] interleaved with some other data, we are
1540 * fine. (Did I just evoke Murphy's Law?) --jhi */
1541 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1543 for (i = 1; i < PL_origargc; i++) {
1544 if ((PL_origargv[i] == s + 1
1546 || PL_origargv[i] == s + 2
1551 (PL_origargv[i] > s &&
1553 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1564 #ifndef PERL_USE_SAFE_PUTENV
1565 /* Can we grab env area too to be used as the area for $0? */
1566 if (s && PL_origenviron && !PL_use_safe_putenv) {
1567 if ((PL_origenviron[0] == s + 1)
1570 (PL_origenviron[0] > s &&
1571 PL_origenviron[0] <=
1572 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1575 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1576 s = PL_origenviron[0];
1579 my_setenv("NoNe SuCh", NULL);
1580 /* Force copy of environment. */
1581 for (i = 1; PL_origenviron[i]; i++) {
1582 if (PL_origenviron[i] == s + 1
1585 (PL_origenviron[i] > s &&
1586 PL_origenviron[i] <=
1587 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1590 s = PL_origenviron[i];
1598 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1600 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1605 /* Come here if running an undumped a.out. */
1607 PL_origfilename = savepv(argv[0]);
1608 PL_do_undump = FALSE;
1609 cxstack_ix = -1; /* start label stack again */
1611 assert (!PL_tainted);
1613 S_set_caret_X(aTHX);
1615 init_postdump_symbols(argc,argv,env);
1620 op_free(PL_main_root);
1621 PL_main_root = NULL;
1623 PL_main_start = NULL;
1624 SvREFCNT_dec(PL_main_cv);
1628 oldscope = PL_scopestack_ix;
1629 PL_dowarn = G_WARN_OFF;
1634 parse_body(env,xsinit);
1635 if (PL_unitcheckav) {
1636 call_list(oldscope, PL_unitcheckav);
1639 PERL_SET_PHASE(PERL_PHASE_CHECK);
1640 call_list(oldscope, PL_checkav);
1648 /* my_exit() was called */
1649 while (PL_scopestack_ix > oldscope)
1652 SET_CURSTASH(PL_defstash);
1653 if (PL_unitcheckav) {
1654 call_list(oldscope, PL_unitcheckav);
1657 PERL_SET_PHASE(PERL_PHASE_CHECK);
1658 call_list(oldscope, PL_checkav);
1663 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1671 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1672 miniperl, and we need to see those flags reflected in the values here. */
1674 /* What this returns is subject to change. Use the public interface in Config.
1677 S_Internals_V(pTHX_ CV *cv)
1680 #ifdef LOCAL_PATCH_COUNT
1681 const int local_patch_count = LOCAL_PATCH_COUNT;
1683 const int local_patch_count = 0;
1685 const int entries = 3 + local_patch_count;
1687 static char non_bincompat_options[] =
1694 # ifdef PERL_DISABLE_PMC
1697 # ifdef PERL_DONT_CREATE_GVSV
1698 " PERL_DONT_CREATE_GVSV"
1700 # ifdef PERL_EXTERNAL_GLOB
1701 " PERL_EXTERNAL_GLOB"
1703 # ifdef PERL_IS_MINIPERL
1706 # ifdef PERL_MALLOC_WRAP
1709 # ifdef PERL_MEM_LOG
1712 # ifdef PERL_MEM_LOG_NOIMPL
1713 " PERL_MEM_LOG_NOIMPL"
1715 # ifdef PERL_PRESERVE_IVUV
1716 " PERL_PRESERVE_IVUV"
1718 # ifdef PERL_USE_DEVEL
1721 # ifdef PERL_USE_SAFE_PUTENV
1722 " PERL_USE_SAFE_PUTENV"
1724 # ifdef UNLINK_ALL_VERSIONS
1725 " UNLINK_ALL_VERSIONS"
1727 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1728 " USE_ATTRIBUTES_FOR_PERLIO"
1730 # ifdef USE_FAST_STDIO
1736 # ifdef USE_LOCALE_CTYPE
1739 # ifdef USE_PERL_ATOF
1742 # ifdef USE_SITECUSTOMIZE
1743 " USE_SITECUSTOMIZE"
1746 PERL_UNUSED_ARG(cv);
1747 PERL_UNUSED_ARG(items);
1749 EXTEND(SP, entries);
1751 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1752 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1753 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1757 PUSHs(Perl_newSVpvn_flags(aTHX_
1758 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1761 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1765 PUSHs(&PL_sv_undef);
1768 for (i = 1; i <= local_patch_count; i++) {
1769 /* This will be an undef, if PL_localpatches[i] is NULL. */
1770 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1776 #define INCPUSH_UNSHIFT 0x01
1777 #define INCPUSH_ADD_OLD_VERS 0x02
1778 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1779 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1780 #define INCPUSH_NOT_BASEDIR 0x10
1781 #define INCPUSH_CAN_RELOCATE 0x20
1782 #define INCPUSH_ADD_SUB_DIRS \
1783 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1786 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1790 int argc = PL_origargc;
1791 char **argv = PL_origargv;
1792 const char *scriptname = NULL;
1793 VOL bool dosearch = FALSE;
1795 bool doextract = FALSE;
1796 const char *cddir = NULL;
1797 #ifdef USE_SITECUSTOMIZE
1798 bool minus_f = FALSE;
1800 SV *linestr_sv = newSV_type(SVt_PVIV);
1801 bool add_read_e_script = FALSE;
1803 PERL_SET_PHASE(PERL_PHASE_START);
1805 SvGROW(linestr_sv, 80);
1806 sv_setpvs(linestr_sv,"");
1812 for (argc--,argv++; argc > 0; argc--,argv++) {
1813 if (argv[0][0] != '-' || !argv[0][1])
1819 #ifndef PERL_STRICT_CR
1843 if ((s = moreswitches(s)))
1848 CHECK_MALLOC_TOO_LATE_FOR('t');
1849 if( !PL_tainting ) {
1850 PL_taint_warn = TRUE;
1856 CHECK_MALLOC_TOO_LATE_FOR('T');
1858 PL_taint_warn = FALSE;
1866 forbid_setid('e', FALSE);
1868 PL_e_script = newSVpvs("");
1869 add_read_e_script = TRUE;
1872 sv_catpv(PL_e_script, s);
1874 sv_catpv(PL_e_script, argv[1]);
1878 Perl_croak(aTHX_ "No code specified for -%c", c);
1879 sv_catpvs(PL_e_script, "\n");
1883 #ifdef USE_SITECUSTOMIZE
1889 case 'I': /* -I handled both here and in moreswitches() */
1890 forbid_setid('I', FALSE);
1891 if (!*++s && (s=argv[1]) != NULL) {
1895 STRLEN len = strlen(s);
1896 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1899 Perl_croak(aTHX_ "No directory specified for -I");
1902 forbid_setid('S', FALSE);
1911 opts_prog = newSVpvs("use Config; Config::_V()");
1915 opts_prog = Perl_newSVpvf(aTHX_
1916 "use Config; Config::config_vars(qw%c%s%c)",
1920 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1921 /* don't look for script or read stdin */
1922 scriptname = BIT_BUCKET;
1934 if (!*++s || isSPACE(*s)) {
1938 /* catch use of gnu style long options.
1939 Both of these exit immediately. */
1940 if (strEQ(s, "version"))
1942 if (strEQ(s, "help"))
1947 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1958 #ifndef SECURE_INTERNAL_GETENV
1961 (s = PerlEnv_getenv("PERL5OPT")))
1965 if (*s == '-' && *(s+1) == 'T') {
1966 CHECK_MALLOC_TOO_LATE_FOR('T');
1968 PL_taint_warn = FALSE;
1971 char *popt_copy = NULL;
1984 if (!strchr("CDIMUdmtwW", *s))
1985 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1989 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1990 s = popt_copy + (s - d);
1998 if( !PL_tainting ) {
1999 PL_taint_warn = TRUE;
2010 /* Set $^X early so that it can be used for relocatable paths in @INC */
2011 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2012 assert (!PL_tainted);
2014 S_set_caret_X(aTHX);
2017 #if defined(USE_SITECUSTOMIZE)
2019 /* The games with local $! are to avoid setting errno if there is no
2020 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2021 ie a q() operator with a NUL byte as a the delimiter. This avoids
2022 problems with pathnames containing (say) ' */
2023 # ifdef PERL_IS_MINIPERL
2024 AV *const inc = GvAV(PL_incgv);
2025 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2028 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2030 "BEGIN { do {local $!; -f q%c%"SVf"/buildcustomize.pl%c} && do q%c%"SVf"/buildcustomize.pl%c }",
2035 /* SITELIB_EXP is a function call on Win32. */
2036 const char *const raw_sitelib = SITELIB_EXP;
2037 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2038 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2039 INCPUSH_CAN_RELOCATE);
2040 const char *const sitelib = SvPVX(sitelib_sv);
2041 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2043 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2046 assert (SvREFCNT(sitelib_sv) == 1);
2047 SvREFCNT_dec(sitelib_sv);
2053 scriptname = argv[0];
2056 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2058 else if (scriptname == NULL) {
2060 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2066 assert (!PL_tainted);
2070 bool suidscript = FALSE;
2072 open_script(scriptname, dosearch, &suidscript, &rsfp);
2074 validate_suid(validarg, scriptname, fdscript, suidscript,
2078 # if defined(SIGCHLD) || defined(SIGCLD)
2081 # define SIGCHLD SIGCLD
2083 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2084 if (sigstate == (Sighandler_t) SIG_IGN) {
2085 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2086 "Can't ignore signal CHLD, forcing to default");
2087 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2095 /* This will croak if suidscript is true, as -x cannot be used with
2097 forbid_setid('x', suidscript);
2098 /* Hence you can't get here if suidscript is true */
2100 find_beginning(linestr_sv, rsfp);
2101 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2102 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2106 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2107 CvUNIQUE_on(PL_compcv);
2109 CvPADLIST(PL_compcv) = pad_new(0);
2111 PL_isarev = newHV();
2114 boot_core_UNIVERSAL();
2116 newXS("Internals::V", S_Internals_V, __FILE__);
2119 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2121 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2127 # ifdef HAS_SOCKS5_INIT
2128 socks5_init(argv[0]);
2134 init_predump_symbols();
2135 /* init_postdump_symbols not currently designed to be called */
2136 /* more than once (ENV isn't cleared first, for example) */
2137 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2139 init_postdump_symbols(argc,argv,env);
2141 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2142 * or explicitly in some platforms.
2143 * locale.c:Perl_init_i18nl10n() if the environment
2144 * look like the user wants to use UTF-8. */
2145 #if defined(__SYMBIAN32__)
2146 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2148 # ifndef PERL_IS_MINIPERL
2150 /* Requires init_predump_symbols(). */
2151 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2156 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2157 * and the default open disciplines. */
2158 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2159 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2161 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2162 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2163 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2165 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2166 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2167 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2169 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2170 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2171 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2173 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2174 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2177 sv_setpvs(sv, ":utf8\0:utf8");
2179 sv_setpvs(sv, ":utf8\0");
2182 sv_setpvs(sv, "\0:utf8");
2191 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2192 if (strEQ(s, "unsafe"))
2193 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2194 else if (strEQ(s, "safe"))
2195 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2197 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2204 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2208 PL_xmlfp = PerlIO_stdout();
2210 PL_xmlfp = PerlIO_open(s, "w");
2212 Perl_croak(aTHX_ "Can't open %s", s);
2214 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2220 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2221 PL_madskills = atoi(s);
2222 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2227 lex_start(linestr_sv, rsfp, 0);
2228 PL_subname = newSVpvs("main");
2230 if (add_read_e_script)
2231 filter_add(read_e_script, NULL);
2233 /* now parse the script */
2235 SETERRNO(0,SS_NORMAL);
2236 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2238 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2240 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2244 CopLINE_set(PL_curcop, 0);
2245 SET_CURSTASH(PL_defstash);
2247 SvREFCNT_dec(PL_e_script);
2255 SAVECOPFILE(PL_curcop);
2256 SAVECOPLINE(PL_curcop);
2257 gv_check(PL_defstash);
2266 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2267 dump_mstats("after compilation:");
2272 PL_restartjmpenv = NULL;
2278 =for apidoc perl_run
2280 Tells a Perl interpreter to run. See L<perlembed>.
2293 PERL_ARGS_ASSERT_PERL_RUN;
2294 #ifndef MULTIPLICITY
2295 PERL_UNUSED_ARG(my_perl);
2298 oldscope = PL_scopestack_ix;
2306 cxstack_ix = -1; /* start context stack again */
2308 case 0: /* normal completion */
2312 case 2: /* my_exit() */
2313 while (PL_scopestack_ix > oldscope)
2316 SET_CURSTASH(PL_defstash);
2317 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2318 PL_endav && !PL_minus_c) {
2319 PERL_SET_PHASE(PERL_PHASE_END);
2320 call_list(oldscope, PL_endav);
2323 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2324 dump_mstats("after execution: ");
2330 POPSTACK_TO(PL_mainstack);
2333 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2344 S_run_body(pTHX_ I32 oldscope)
2347 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2348 PL_sawampersand ? "Enabling" : "Omitting"));
2350 if (!PL_restartop) {
2354 exit(0); /* less likely to core dump than my_exit(0) */
2358 if (DEBUG_x_TEST || DEBUG_B_TEST)
2359 dump_all_perl(!DEBUG_B_TEST);
2361 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2365 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2368 if (PERLDB_SINGLE && PL_DBsingle)
2369 sv_setiv(PL_DBsingle, 1);
2371 PERL_SET_PHASE(PERL_PHASE_INIT);
2372 call_list(oldscope, PL_initav);
2374 #ifdef PERL_DEBUG_READONLY_OPS
2375 Perl_pending_Slabs_to_ro(aTHX);
2381 PERL_SET_PHASE(PERL_PHASE_RUN);
2384 PL_restartjmpenv = NULL;
2385 PL_op = PL_restartop;
2389 else if (PL_main_start) {
2390 CvDEPTH(PL_main_cv) = 1;
2391 PL_op = PL_main_start;
2399 =head1 SV Manipulation Functions
2401 =for apidoc p||get_sv
2403 Returns the SV of the specified Perl scalar. C<flags> are passed to
2404 C<gv_fetchpv>. If C<GV_ADD> is set and the
2405 Perl variable does not exist then it will be created. If C<flags> is zero
2406 and the variable does not exist then NULL is returned.
2412 Perl_get_sv(pTHX_ const char *name, I32 flags)
2416 PERL_ARGS_ASSERT_GET_SV;
2418 gv = gv_fetchpv(name, flags, SVt_PV);
2425 =head1 Array Manipulation Functions
2427 =for apidoc p||get_av
2429 Returns the AV of the specified Perl global or package array with the given
2430 name (so it won't work on lexical variables). C<flags> are passed
2431 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2432 Perl variable does not exist then it will be created. If C<flags> is zero
2433 and the variable does not exist then NULL is returned.
2435 Perl equivalent: C<@{"$name"}>.
2441 Perl_get_av(pTHX_ const char *name, I32 flags)
2443 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2445 PERL_ARGS_ASSERT_GET_AV;
2455 =head1 Hash Manipulation Functions
2457 =for apidoc p||get_hv
2459 Returns the HV of the specified Perl hash. C<flags> are passed to
2460 C<gv_fetchpv>. If C<GV_ADD> is set and the
2461 Perl variable does not exist then it will be created. If C<flags> is zero
2462 and the variable does not exist then NULL is returned.
2468 Perl_get_hv(pTHX_ const char *name, I32 flags)
2470 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2472 PERL_ARGS_ASSERT_GET_HV;
2482 =head1 CV Manipulation Functions
2484 =for apidoc p||get_cvn_flags
2486 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2487 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2488 exist then it will be declared (which has the same effect as saying
2489 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2490 then NULL is returned.
2492 =for apidoc p||get_cv
2494 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2500 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2502 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2503 /* XXX this is probably not what they think they're getting.
2504 * It has the same effect as "sub name;", i.e. just a forward
2507 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2509 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2510 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2511 return newSUB(start_subparse(FALSE, 0),
2512 newSVOP(OP_CONST, 0, sv),
2520 /* Nothing in core calls this now, but we can't replace it with a macro and
2521 move it to mathoms.c as a macro would evaluate name twice. */
2523 Perl_get_cv(pTHX_ const char *name, I32 flags)
2525 PERL_ARGS_ASSERT_GET_CV;
2527 return get_cvn_flags(name, strlen(name), flags);
2530 /* Be sure to refetch the stack pointer after calling these routines. */
2534 =head1 Callback Functions
2536 =for apidoc p||call_argv
2538 Performs a callback to the specified named and package-scoped Perl subroutine
2539 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2541 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2547 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2549 /* See G_* flags in cop.h */
2550 /* null terminated arg list */
2555 PERL_ARGS_ASSERT_CALL_ARGV;
2560 mXPUSHs(newSVpv(*argv,0));
2565 return call_pv(sub_name, flags);
2569 =for apidoc p||call_pv
2571 Performs a callback to the specified Perl sub. See L<perlcall>.
2577 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2578 /* name of the subroutine */
2579 /* See G_* flags in cop.h */
2581 PERL_ARGS_ASSERT_CALL_PV;
2583 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2587 =for apidoc p||call_method
2589 Performs a callback to the specified Perl method. The blessed object must
2590 be on the stack. See L<perlcall>.
2596 Perl_call_method(pTHX_ const char *methname, I32 flags)
2597 /* name of the subroutine */
2598 /* See G_* flags in cop.h */
2601 PERL_ARGS_ASSERT_CALL_METHOD;
2603 len = strlen(methname);
2605 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2606 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2609 /* May be called with any of a CV, a GV, or an SV containing the name. */
2611 =for apidoc p||call_sv
2613 Performs a callback to the Perl sub whose name is in the SV. See
2620 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2621 /* See G_* flags in cop.h */
2624 LOGOP myop; /* fake syntax tree node */
2629 bool oldcatch = CATCH_GET;
2631 OP* const oldop = PL_op;
2634 PERL_ARGS_ASSERT_CALL_SV;
2636 if (flags & G_DISCARD) {
2640 if (!(flags & G_WANT)) {
2641 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2646 Zero(&myop, 1, LOGOP);
2647 myop.op_next = NULL;
2648 if (!(flags & G_NOARGS))
2649 myop.op_flags |= OPf_STACKED;
2650 myop.op_flags |= OP_GIMME_REVERSE(flags);
2654 EXTEND(PL_stack_sp, 1);
2655 *++PL_stack_sp = sv;
2657 oldscope = PL_scopestack_ix;
2659 if (PERLDB_SUB && PL_curstash != PL_debstash
2660 /* Handle first BEGIN of -d. */
2661 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2662 /* Try harder, since this may have been a sighandler, thus
2663 * curstash may be meaningless. */
2664 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2665 && !(flags & G_NODEBUG))
2666 PL_op->op_private |= OPpENTERSUB_DB;
2668 if (flags & G_METHOD) {
2669 Zero(&method_op, 1, UNOP);
2670 method_op.op_next = PL_op;
2671 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2672 method_op.op_type = OP_METHOD;
2673 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2674 myop.op_type = OP_ENTERSUB;
2675 PL_op = (OP*)&method_op;
2678 if (!(flags & G_EVAL)) {
2680 CALL_BODY_SUB((OP*)&myop);
2681 retval = PL_stack_sp - (PL_stack_base + oldmark);
2682 CATCH_SET(oldcatch);
2685 myop.op_other = (OP*)&myop;
2687 create_eval_scope(flags|G_FAKINGEVAL);
2695 CALL_BODY_SUB((OP*)&myop);
2696 retval = PL_stack_sp - (PL_stack_base + oldmark);
2697 if (!(flags & G_KEEPERR)) {
2705 /* my_exit() was called */
2706 SET_CURSTASH(PL_defstash);
2713 PL_restartjmpenv = NULL;
2714 PL_op = PL_restartop;
2718 PL_stack_sp = PL_stack_base + oldmark;
2719 if ((flags & G_WANT) == G_ARRAY)
2723 *++PL_stack_sp = &PL_sv_undef;
2728 if (PL_scopestack_ix > oldscope)
2729 delete_eval_scope();
2733 if (flags & G_DISCARD) {
2734 PL_stack_sp = PL_stack_base + oldmark;
2743 /* Eval a string. The G_EVAL flag is always assumed. */
2746 =for apidoc p||eval_sv
2748 Tells Perl to C<eval> the string in the SV. It supports the same flags
2749 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2755 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2757 /* See G_* flags in cop.h */
2761 UNOP myop; /* fake syntax tree node */
2762 VOL I32 oldmark = SP - PL_stack_base;
2765 OP* const oldop = PL_op;
2768 PERL_ARGS_ASSERT_EVAL_SV;
2770 if (flags & G_DISCARD) {
2777 Zero(PL_op, 1, UNOP);
2778 EXTEND(PL_stack_sp, 1);
2779 *++PL_stack_sp = sv;
2781 if (!(flags & G_NOARGS))
2782 myop.op_flags = OPf_STACKED;
2783 myop.op_next = NULL;
2784 myop.op_type = OP_ENTEREVAL;
2785 myop.op_flags |= OP_GIMME_REVERSE(flags);
2786 if (flags & G_KEEPERR)
2787 myop.op_flags |= OPf_SPECIAL;
2789 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2790 * before a PUSHEVAL, which corrupts the stack after a croak */
2791 TAINT_PROPER("eval_sv()");
2797 if (PL_op == (OP*)(&myop)) {
2798 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2800 goto fail; /* failed in compilation */
2803 retval = PL_stack_sp - (PL_stack_base + oldmark);
2804 if (!(flags & G_KEEPERR)) {
2812 /* my_exit() was called */
2813 SET_CURSTASH(PL_defstash);
2820 PL_restartjmpenv = NULL;
2821 PL_op = PL_restartop;
2826 PL_stack_sp = PL_stack_base + oldmark;
2827 if ((flags & G_WANT) == G_ARRAY)
2831 *++PL_stack_sp = &PL_sv_undef;
2837 if (flags & G_DISCARD) {
2838 PL_stack_sp = PL_stack_base + oldmark;
2848 =for apidoc p||eval_pv
2850 Tells Perl to C<eval> the given string and return an SV* result.
2856 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2860 SV* sv = newSVpv(p, 0);
2862 PERL_ARGS_ASSERT_EVAL_PV;
2864 eval_sv(sv, G_SCALAR);
2871 if (croak_on_error && SvTRUE(ERRSV)) {
2872 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2878 /* Require a module. */
2881 =head1 Embedding Functions
2883 =for apidoc p||require_pv
2885 Tells Perl to C<require> the file named by the string argument. It is
2886 analogous to the Perl code C<eval "require '$file'">. It's even
2887 implemented that way; consider using load_module instead.
2892 Perl_require_pv(pTHX_ const char *pv)
2898 PERL_ARGS_ASSERT_REQUIRE_PV;
2900 PUSHSTACKi(PERLSI_REQUIRE);
2902 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2903 eval_sv(sv_2mortal(sv), G_DISCARD);
2909 S_usage(pTHX) /* XXX move this out into a module ? */
2911 /* This message really ought to be max 23 lines.
2912 * Removed -h because the user already knows that option. Others? */
2914 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2915 minimum of 509 character string literals. */
2916 static const char * const usage_msg[] = {
2917 " -0[octal] specify record separator (\\0, if no argument)\n"
2918 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2919 " -C[number/list] enables the listed Unicode features\n"
2920 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2921 " -d[:debugger] run program under debugger\n"
2922 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2923 " -e program one line of program (several -e's allowed, omit programfile)\n"
2924 " -E program like -e, but enables all optional features\n"
2925 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2926 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2927 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2928 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2929 " -l[octal] enable line ending processing, specifies line terminator\n"
2930 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2931 " -n assume \"while (<>) { ... }\" loop around program\n"
2932 " -p assume loop like -n but print line also, like sed\n"
2933 " -s enable rudimentary parsing for switches after programfile\n"
2934 " -S look for programfile using PATH environment variable\n",
2935 " -t enable tainting warnings\n"
2936 " -T enable tainting checks\n"
2937 " -u dump core after parsing program\n"
2938 " -U allow unsafe operations\n"
2939 " -v print version, patchlevel and license\n"
2940 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2941 " -w enable many useful warnings\n"
2942 " -W enable all warnings\n"
2943 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2944 " -X disable all warnings\n"
2946 "Run 'perldoc perl' for more help with Perl.\n\n",
2949 const char * const *p = usage_msg;
2950 PerlIO *out = PerlIO_stdout();
2953 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2956 PerlIO_puts(out, *p++);
2960 /* convert a string of -D options (or digits) into an int.
2961 * sets *s to point to the char after the options */
2965 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2967 static const char * const usage_msgd[] = {
2968 " Debugging flag values: (see also -d)\n"
2969 " p Tokenizing and parsing (with v, displays parse stack)\n"
2970 " s Stack snapshots (with v, displays all stacks)\n"
2971 " l Context (loop) stack processing\n"
2972 " t Trace execution\n"
2973 " o Method and overloading resolution\n",
2974 " c String/numeric conversions\n"
2975 " P Print profiling info, source file input state\n"
2976 " m Memory and SV allocation\n"
2977 " f Format processing\n"
2978 " r Regular expression parsing and execution\n"
2979 " x Syntax tree dump\n",
2980 " u Tainting checks\n"
2981 " H Hash dump -- usurps values()\n"
2982 " X Scratchpad allocation\n"
2985 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2986 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2987 " v Verbose: use in conjunction with other flags\n"
2988 " C Copy On Write\n"
2989 " A Consistency checks on internal structures\n"
2990 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2991 " M trace smart match resolution\n"
2992 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2997 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3000 /* if adding extra options, remember to update DEBUG_MASK */
3001 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3003 for (; isALNUM(**s); (*s)++) {
3004 const char * const d = strchr(debopts,**s);
3006 i |= 1 << (d - debopts);
3007 else if (ckWARN_d(WARN_DEBUGGING))
3008 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3009 "invalid option -D%c, use -D'' to see choices\n", **s);
3012 else if (isDIGIT(**s)) {
3014 for (; isALNUM(**s); (*s)++) ;
3016 else if (givehelp) {
3017 const char *const *p = usage_msgd;
3018 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3021 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3022 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3023 "-Dp not implemented on this platform\n");
3029 /* This routine handles any switches that can be given during run */
3032 Perl_moreswitches(pTHX_ const char *s)
3036 const char option = *s; /* used to remember option in -m/-M code */
3038 PERL_ARGS_ASSERT_MORESWITCHES;
3046 SvREFCNT_dec(PL_rs);
3047 if (s[1] == 'x' && s[2]) {
3048 const char *e = s+=2;
3054 flags = PERL_SCAN_SILENT_ILLDIGIT;
3055 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3056 if (s + numlen < e) {
3057 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3061 PL_rs = newSVpvs("");
3062 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3063 tmps = (U8*)SvPVX(PL_rs);
3064 uvchr_to_utf8(tmps, rschar);
3065 SvCUR_set(PL_rs, UNISKIP(rschar));
3070 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3071 if (rschar & ~((U8)~0))
3072 PL_rs = &PL_sv_undef;
3073 else if (!rschar && numlen >= 2)
3074 PL_rs = newSVpvs("");
3076 char ch = (char)rschar;
3077 PL_rs = newSVpvn(&ch, 1);
3080 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3085 PL_unicode = parse_unicode_opts( (const char **)&s );
3086 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3092 while (*s && !isSPACE(*s)) ++s;
3093 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3104 forbid_setid('d', FALSE);
3107 /* -dt indicates to the debugger that threads will be used */
3108 if (*s == 't' && !isALNUM(s[1])) {
3110 my_setenv("PERL5DB_THREADED", "1");
3113 /* The following permits -d:Mod to accepts arguments following an =
3114 in the fashion that -MSome::Mod does. */
3115 if (*s == ':' || *s == '=') {
3122 sv = newSVpvs("no Devel::");
3124 sv = newSVpvs("use Devel::");
3128 end = s + strlen(s);
3130 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3131 while(isALNUM(*s) || *s==':') ++s;
3133 sv_catpvn(sv, start, end - start);
3135 sv_catpvn(sv, start, s-start);
3136 /* Don't use NUL as q// delimiter here, this string goes in the
3138 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3141 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3145 PL_perldb = PERLDB_ALL;
3152 forbid_setid('D', FALSE);
3154 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3155 #else /* !DEBUGGING */
3156 if (ckWARN_d(WARN_DEBUGGING))
3157 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3158 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3159 for (s++; isALNUM(*s); s++) ;
3166 Safefree(PL_inplace);
3167 #if defined(__CYGWIN__) /* do backup extension automagically */
3168 if (*(s+1) == '\0') {
3169 PL_inplace = savepvs(".bak");
3172 #endif /* __CYGWIN__ */
3174 const char * const start = ++s;
3175 while (*s && !isSPACE(*s))
3178 PL_inplace = savepvn(start, s - start);
3182 if (*s == '-') /* Additional switches on #! line. */
3186 case 'I': /* -I handled both here and in parse_body() */
3187 forbid_setid('I', FALSE);
3189 while (*s && isSPACE(*s))
3194 /* ignore trailing spaces (possibly followed by other switches) */
3196 for (e = p; *e && !isSPACE(*e); e++) ;
3200 } while (*p && *p != '-');
3202 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3208 Perl_croak(aTHX_ "No directory specified for -I");
3214 SvREFCNT_dec(PL_ors_sv);
3220 PL_ors_sv = newSVpvs("\n");
3221 numlen = 3 + (*s == '0');
3222 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3226 if (RsPARA(PL_rs)) {
3227 PL_ors_sv = newSVpvs("\n\n");
3230 PL_ors_sv = newSVsv(PL_rs);
3235 forbid_setid('M', FALSE); /* XXX ? */
3238 forbid_setid('m', FALSE); /* XXX ? */
3243 const char *use = "use ";
3245 /* -M-foo == 'no foo' */
3246 /* Leading space on " no " is deliberate, to make both
3247 possibilities the same length. */
3248 if (*s == '-') { use = " no "; ++s; }
3249 sv = newSVpvn(use,4);
3251 /* We allow -M'Module qw(Foo Bar)' */
3252 while(isALNUM(*s) || *s==':') {
3261 Perl_croak(aTHX_ "Module name required with -%c option",
3264 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3265 "contains single ':'",
3266 (int)(s - start), start, option);
3267 end = s + strlen(s);
3269 sv_catpvn(sv, start, end - start);
3270 if (option == 'm') {
3272 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3273 sv_catpvs( sv, " ()");
3276 sv_catpvn(sv, start, s-start);
3277 /* Use NUL as q''-delimiter. */
3278 sv_catpvs(sv, " split(/,/,q\0");
3280 sv_catpvn(sv, s, end - s);
3281 sv_catpvs(sv, "\0)");
3284 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3287 Perl_croak(aTHX_ "Missing argument to -%c", option);
3298 forbid_setid('s', FALSE);
3299 PL_doswitches = TRUE;
3309 PL_do_undump = TRUE;
3319 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3320 PL_dowarn |= G_WARN_ON;
3325 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3326 if (!specialWARN(PL_compiling.cop_warnings))
3327 PerlMemShared_free(PL_compiling.cop_warnings);
3328 PL_compiling.cop_warnings = pWARN_ALL ;
3332 PL_dowarn = G_WARN_ALL_OFF;
3333 if (!specialWARN(PL_compiling.cop_warnings))
3334 PerlMemShared_free(PL_compiling.cop_warnings);
3335 PL_compiling.cop_warnings = pWARN_NONE ;
3342 if (s[0] == '-') /* Additional switches on #! line. */
3347 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3353 #ifdef ALTERNATE_SHEBANG
3354 case 'S': /* OS/2 needs -S on "extproc" line. */
3357 case 'e': case 'f': case 'x': case 'E':
3358 #ifndef ALTERNATE_SHEBANG
3362 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3365 "Unrecognized switch: -%.1s (-h will show valid options)",s
3375 if (!sv_derived_from(PL_patchlevel, "version"))
3376 upg_version(PL_patchlevel, TRUE);
3379 SV* level= vstringify(PL_patchlevel);
3380 #ifdef PERL_PATCHNUM
3381 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3382 SV *num = newSVpvs(PERL_PATCHNUM "*");
3384 SV *num = newSVpvs(PERL_PATCHNUM);
3387 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3388 SvREFCNT_dec(level);
3391 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3395 PerlIO_printf(PerlIO_stdout(),
3396 "\nThis is perl " STRINGIFY(PERL_REVISION)
3397 ", version " STRINGIFY(PERL_VERSION)
3398 ", subversion " STRINGIFY(PERL_SUBVERSION)
3399 " (%"SVf") built for " ARCHNAME, level
3401 SvREFCNT_dec(level);
3404 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3405 PerlIO_printf(PerlIO_stdout(),
3406 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3407 SVfARG(vstringify(PL_patchlevel))));
3408 PerlIO_printf(PerlIO_stdout(),
3409 Perl_form(aTHX_ " built under %s at %s %s\n",
3410 OSNAME, __DATE__, __TIME__));
3411 PerlIO_printf(PerlIO_stdout(),
3412 Perl_form(aTHX_ " OS Specific Release: %s\n",
3415 #if defined(LOCAL_PATCH_COUNT)
3416 if (LOCAL_PATCH_COUNT > 0)
3417 PerlIO_printf(PerlIO_stdout(),
3418 "\n(with %d registered patch%s, "
3419 "see perl -V for more detail)",
3421 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3424 PerlIO_printf(PerlIO_stdout(),
3425 "\n\nCopyright 1987-2012, Larry Wall\n");
3427 PerlIO_printf(PerlIO_stdout(),
3428 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3431 PerlIO_printf(PerlIO_stdout(),
3432 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3433 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3436 PerlIO_printf(PerlIO_stdout(),
3437 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3438 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3441 PerlIO_printf(PerlIO_stdout(),
3442 "atariST series port, ++jrb bammi@cadence.com\n");
3445 PerlIO_printf(PerlIO_stdout(),
3446 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3449 PerlIO_printf(PerlIO_stdout(),
3450 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3453 PerlIO_printf(PerlIO_stdout(),
3454 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3457 PerlIO_printf(PerlIO_stdout(),
3458 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3461 PerlIO_printf(PerlIO_stdout(),
3462 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3465 PerlIO_printf(PerlIO_stdout(),
3466 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3469 PerlIO_printf(PerlIO_stdout(),
3470 "EPOC port by Olaf Flebbe, 1999-2002\n");
3473 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3474 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3477 #ifdef __SYMBIAN32__
3478 PerlIO_printf(PerlIO_stdout(),
3479 "Symbian port by Nokia, 2004-2005\n");
3481 #ifdef BINARY_BUILD_NOTICE
3482 BINARY_BUILD_NOTICE;
3484 PerlIO_printf(PerlIO_stdout(),
3486 Perl may be copied only under the terms of either the Artistic License or the\n\
3487 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3488 Complete documentation for Perl, including FAQ lists, should be found on\n\
3489 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3490 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3494 /* compliments of Tom Christiansen */
3496 /* unexec() can be found in the Gnu emacs distribution */
3497 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3500 Perl_my_unexec(pTHX)
3502 PERL_UNUSED_CONTEXT;
3504 SV * prog = newSVpv(BIN_EXP, 0);
3505 SV * file = newSVpv(PL_origfilename, 0);
3509 sv_catpvs(prog, "/perl");
3510 sv_catpvs(file, ".perldump");
3512 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3513 /* unexec prints msg to stderr in case of failure */
3514 PerlProc_exit(status);
3517 # include <lib$routines.h>
3518 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3519 # elif defined(WIN32) || defined(__CYGWIN__)
3520 Perl_croak(aTHX_ "dump is not supported");
3522 ABORT(); /* for use with undump */
3527 /* initialize curinterp */
3533 # define PERLVAR(prefix,var,type)
3534 # define PERLVARA(prefix,var,n,type)
3535 # if defined(PERL_IMPLICIT_CONTEXT)
3536 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3537 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3539 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3540 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3542 # include "intrpvar.h"
3548 # define PERLVAR(prefix,var,type)
3549 # define PERLVARA(prefix,var,n,type)
3550 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3551 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3552 # include "intrpvar.h"
3559 /* As these are inside a structure, PERLVARI isn't capable of initialising
3561 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3562 PL_reg_poscache = PL_reg_starttry = NULL;
3566 S_init_main_stash(pTHX)
3571 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3572 /* We know that the string "main" will be in the global shared string
3573 table, so it's a small saving to use it rather than allocate another
3575 PL_curstname = newSVpvs_share("main");
3576 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3577 /* If we hadn't caused another reference to "main" to be in the shared
3578 string table above, then it would be worth reordering these two,
3579 because otherwise all we do is delete "main" from it as a consequence
3580 of the SvREFCNT_dec, only to add it again with hv_name_set */
3581 SvREFCNT_dec(GvHV(gv));
3582 hv_name_set(PL_defstash, "main", 4, 0);
3583 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3585 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3587 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3588 GvMULTI_on(PL_incgv);
3589 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3590 GvMULTI_on(PL_hintgv);
3591 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3592 SvREFCNT_inc_simple_void(PL_defgv);
3593 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3594 SvREFCNT_inc_simple_void(PL_errgv);
3595 GvMULTI_on(PL_errgv);
3596 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3597 GvMULTI_on(PL_replgv);
3598 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3599 #ifdef PERL_DONT_CREATE_GVSV
3602 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3604 SET_CURSTASH(PL_defstash);
3605 CopSTASH_set(&PL_compiling, PL_defstash);
3606 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3607 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3609 /* We must init $/ before switches are processed. */
3610 sv_setpvs(get_sv("/", GV_ADD), "\n");
3614 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3615 bool *suidscript, PerlIO **rsfpp)
3620 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3623 PL_origfilename = savepvs("-e");
3626 /* if find_script() returns, it returns a malloc()-ed value */
3627 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3629 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3630 const char *s = scriptname + 8;
3636 * Tell apart "normal" usage of fdscript, e.g.
3637 * with bash on FreeBSD:
3638 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3639 * from usage in suidperl.
3640 * Does any "normal" usage leave garbage after the number???
3641 * Is it a mistake to use a similar /dev/fd/ construct for
3646 * Be supersafe and do some sanity-checks.
3647 * Still, can we be sure we got the right thing?
3650 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3653 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3655 scriptname = savepv(s + 1);
3656 Safefree(PL_origfilename);
3657 PL_origfilename = (char *)scriptname;
3662 CopFILE_free(PL_curcop);
3663 CopFILE_set(PL_curcop, PL_origfilename);
3664 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3665 scriptname = (char *)"";
3666 if (fdscript >= 0) {
3667 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3668 # if defined(HAS_FCNTL) && defined(F_SETFD)
3670 /* ensure close-on-exec */
3671 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3674 else if (!*scriptname) {
3675 forbid_setid(0, *suidscript);
3676 *rsfpp = PerlIO_stdin();
3679 #ifdef FAKE_BIT_BUCKET
3680 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3681 * is called) and still have the "-e" work. (Believe it or not,
3682 * a /dev/null is required for the "-e" to work because source
3683 * filter magic is used to implement it. ) This is *not* a general
3684 * replacement for a /dev/null. What we do here is create a temp
3685 * file (an empty file), open up that as the script, and then
3686 * immediately close and unlink it. Close enough for jazz. */
3687 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3688 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3689 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3690 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3691 FAKE_BIT_BUCKET_TEMPLATE
3693 const char * const err = "Failed to create a fake bit bucket";
3694 if (strEQ(scriptname, BIT_BUCKET)) {
3695 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3696 int tmpfd = mkstemp(tmpname);
3698 scriptname = tmpname;
3701 Perl_croak(aTHX_ err);
3704 scriptname = mktemp(tmpname);
3706 Perl_croak(aTHX_ err);
3711 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3712 #ifdef FAKE_BIT_BUCKET
3713 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3714 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3715 && strlen(scriptname) == sizeof(tmpname) - 1) {
3718 scriptname = BIT_BUCKET;
3720 # if defined(HAS_FCNTL) && defined(F_SETFD)
3722 /* ensure close-on-exec */
3723 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3727 /* PSz 16 Sep 03 Keep neat error message */
3729 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3731 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3732 CopFILE(PL_curcop), Strerror(errno));
3738 * I_SYSSTATVFS HAS_FSTATVFS
3740 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3741 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3742 * here so that metaconfig picks them up. */
3745 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3746 /* Don't even need this function. */
3749 S_validate_suid(pTHX_ PerlIO *rsfp)
3751 PERL_ARGS_ASSERT_VALIDATE_SUID;
3753 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3756 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3757 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3759 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3762 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3763 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3764 /* not set-id, must be wrapped */
3767 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3770 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3774 register const char *s2;
3776 PERL_ARGS_ASSERT_FIND_BEGINNING;
3778 /* skip forward in input to the real script? */
3781 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3782 Perl_croak(aTHX_ "No Perl script found in input\n");
3784 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3785 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3786 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3788 while (*s == ' ' || *s == '\t') s++;
3790 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3791 || s2[-1] == '_') s2--;
3792 if (strnEQ(s2-4,"perl",4))
3793 while ((s = moreswitches(s)))
3803 PL_uid = PerlProc_getuid();
3804 PL_euid = PerlProc_geteuid();
3805 PL_gid = PerlProc_getgid();
3806 PL_egid = PerlProc_getegid();
3808 PL_uid |= PL_gid << 16;
3809 PL_euid |= PL_egid << 16;
3811 /* Should not happen: */
3812 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3813 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3816 * Should go by suidscript, not uid!=euid: why disallow
3817 * system("ls") in scripts run from setuid things?
3818 * Or, is this run before we check arguments and set suidscript?
3819 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3820 * (We never have suidscript, can we be sure to have fdscript?)
3821 * Or must then go by UID checks? See comments in forbid_setid also.
3825 /* This is used very early in the lifetime of the program,
3826 * before even the options are parsed, so PL_tainting has
3827 * not been initialized properly. */
3829 Perl_doing_taint(int argc, char *argv[], char *envp[])
3831 #ifndef PERL_IMPLICIT_SYS
3832 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3833 * before we have an interpreter-- and the whole point of this
3834 * function is to be called at such an early stage. If you are on
3835 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3836 * "tainted because running with altered effective ids', you'll
3837 * have to add your own checks somewhere in here. The two most
3838 * known samples of 'implicitness' are Win32 and NetWare, neither
3839 * of which has much of concept of 'uids'. */
3840 int uid = PerlProc_getuid();
3841 int euid = PerlProc_geteuid();
3842 int gid = PerlProc_getgid();
3843 int egid = PerlProc_getegid();
3850 if (uid && (euid != uid || egid != gid))
3852 #endif /* !PERL_IMPLICIT_SYS */
3853 /* This is a really primitive check; environment gets ignored only
3854 * if -T are the first chars together; otherwise one gets
3855 * "Too late" message. */
3856 if ( argc > 1 && argv[1][0] == '-'
3857 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3862 /* Passing the flag as a single char rather than a string is a slight space
3863 optimisation. The only message that isn't /^-.$/ is
3864 "program input from stdin", which is substituted in place of '\0', which
3865 could never be a command line flag. */
3867 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3870 char string[3] = "-x";
3871 const char *message = "program input from stdin";
3878 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3879 if (PL_euid != PL_uid)
3880 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3881 if (PL_egid != PL_gid)
3882 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3883 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3885 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3889 Perl_init_dbargs(pTHX)
3891 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3896 /* Someone has already created it.
3897 It might have entries, and if we just turn off AvREAL(), they will
3898 "leak" until global destruction. */
3900 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3901 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3903 AvREIFY_only(PL_dbargs);
3907 Perl_init_debugger(pTHX)
3910 HV * const ostash = PL_curstash;
3912 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3914 Perl_init_dbargs(aTHX);
3915 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3916 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3917 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3918 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3919 if (!SvIOK(PL_DBsingle))
3920 sv_setiv(PL_DBsingle, 0);
3921 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3922 if (!SvIOK(PL_DBtrace))
3923 sv_setiv(PL_DBtrace, 0);
3924 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3925 if (!SvIOK(PL_DBsignal))
3926 sv_setiv(PL_DBsignal, 0);
3927 SvREFCNT_dec(PL_curstash);
3928 PL_curstash = ostash;
3931 #ifndef STRESS_REALLOC
3932 #define REASONABLE(size) (size)
3934 #define REASONABLE(size) (1) /* unreasonable */
3938 Perl_init_stacks(pTHX)
3941 /* start with 128-item stack and 8K cxstack */
3942 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3943 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3944 PL_curstackinfo->si_type = PERLSI_MAIN;
3945 PL_curstack = PL_curstackinfo->si_stack;
3946 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3948 PL_stack_base = AvARRAY(PL_curstack);
3949 PL_stack_sp = PL_stack_base;
3950 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3952 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3955 PL_tmps_max = REASONABLE(128);
3957 Newx(PL_markstack,REASONABLE(32),I32);
3958 PL_markstack_ptr = PL_markstack;
3959 PL_markstack_max = PL_markstack + REASONABLE(32);
3963 Newx(PL_scopestack,REASONABLE(32),I32);
3965 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3967 PL_scopestack_ix = 0;
3968 PL_scopestack_max = REASONABLE(32);
3970 Newx(PL_savestack,REASONABLE(128),ANY);
3971 PL_savestack_ix = 0;
3972 PL_savestack_max = REASONABLE(128);
3981 while (PL_curstackinfo->si_next)
3982 PL_curstackinfo = PL_curstackinfo->si_next;
3983 while (PL_curstackinfo) {
3984 PERL_SI *p = PL_curstackinfo->si_prev;
3985 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3986 Safefree(PL_curstackinfo->si_cxstack);
3987 Safefree(PL_curstackinfo);
3988 PL_curstackinfo = p;
3990 Safefree(PL_tmps_stack);
3991 Safefree(PL_markstack);
3992 Safefree(PL_scopestack);
3994 Safefree(PL_scopestack_name);
3996 Safefree(PL_savestack);
4000 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4002 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4003 AV *const isa = GvAVn(gv);
4006 PERL_ARGS_ASSERT_POPULATE_ISA;
4008 if(AvFILLp(isa) != -1)
4011 /* NOTE: No support for tied ISA */
4013 va_start(args, len);
4015 const char *const parent = va_arg(args, const char*);
4020 parent_len = va_arg(args, size_t);
4022 /* Arguments are supplied with a trailing :: */
4023 assert(parent_len > 2);
4024 assert(parent[parent_len - 1] == ':');
4025 assert(parent[parent_len - 2] == ':');
4026 av_push(isa, newSVpvn(parent, parent_len - 2));
4027 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4034 S_init_predump_symbols(pTHX)
4040 sv_setpvs(get_sv("\"", GV_ADD), " ");
4041 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4044 /* Historically, PVIOs were blessed into IO::Handle, unless
4045 FileHandle was loaded, in which case they were blessed into
4046 that. Action at a distance.
4047 However, if we simply bless into IO::Handle, we break code
4048 that assumes that PVIOs will have (among others) a seek
4049 method. IO::File inherits from IO::Handle and IO::Seekable,
4050 and provides the needed methods. But if we simply bless into
4051 it, then we break code that assumed that by loading
4052 IO::Handle, *it* would work.
4053 So a compromise is to set up the correct @IO::File::ISA,
4054 so that code that does C<use IO::Handle>; will still work.
4057 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4058 STR_WITH_LEN("IO::Handle::"),
4059 STR_WITH_LEN("IO::Seekable::"),
4060 STR_WITH_LEN("Exporter::"),
4063 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4064 GvMULTI_on(PL_stdingv);
4065 io = GvIOp(PL_stdingv);
4066 IoTYPE(io) = IoTYPE_RDONLY;
4067 IoIFP(io) = PerlIO_stdin();
4068 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4070 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4072 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4075 IoTYPE(io) = IoTYPE_WRONLY;
4076 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4078 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4080 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4082 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4083 GvMULTI_on(PL_stderrgv);
4084 io = GvIOp(PL_stderrgv);
4085 IoTYPE(io) = IoTYPE_WRONLY;
4086 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4087 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4089 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4091 PL_statname = newSVpvs(""); /* last filename we did stat on */
4095 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4099 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4101 argc--,argv++; /* skip name of script */
4102 if (PL_doswitches) {
4103 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4107 if (argv[0][1] == '-' && !argv[0][2]) {
4111 if ((s = strchr(argv[0], '='))) {
4112 const char *const start_name = argv[0] + 1;
4113 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4114 TRUE, SVt_PV)), s + 1);
4117 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4120 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4121 GvMULTI_on(PL_argvgv);
4122 (void)gv_AVadd(PL_argvgv);
4123 av_clear(GvAVn(PL_argvgv));
4124 for (; argc > 0; argc--,argv++) {
4125 SV * const sv = newSVpv(argv[0],0);
4126 av_push(GvAVn(PL_argvgv),sv);
4127 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4128 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4131 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4132 (void)sv_utf8_decode(sv);
4138 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4143 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4145 PL_toptarget = newSV_type(SVt_PVFM);
4146 sv_setpvs(PL_toptarget, "");
4147 PL_bodytarget = newSV_type(SVt_PVFM);
4148 sv_setpvs(PL_bodytarget, "");
4149 PL_formtarget = PL_bodytarget;
4153 init_argv_symbols(argc,argv);
4155 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4156 sv_setpv(GvSV(tmpgv),PL_origfilename);
4158 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4160 bool env_is_not_environ;
4161 GvMULTI_on(PL_envgv);
4162 hv = GvHVn(PL_envgv);
4163 hv_magic(hv, NULL, PERL_MAGIC_env);
4165 #ifdef USE_ENVIRON_ARRAY
4166 /* Note that if the supplied env parameter is actually a copy
4167 of the global environ then it may now point to free'd memory
4168 if the environment has been modified since. To avoid this
4169 problem we treat env==NULL as meaning 'use the default'
4173 env_is_not_environ = env != environ;
4174 if (env_is_not_environ
4175 # ifdef USE_ITHREADS
4176 && PL_curinterp == aTHX
4185 for (; *env; env++) {
4188 if (!(s = strchr(old_var,'=')) || s == old_var)
4191 #if defined(MSDOS) && !defined(DJGPP)
4193 (void)strupr(old_var);
4196 sv = newSVpv(s+1, 0);
4197 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4198 if (env_is_not_environ)
4202 #endif /* USE_ENVIRON_ARRAY */
4203 #endif /* !PERL_MICRO */
4206 #ifdef THREADS_HAVE_PIDS
4207 PL_ppid = (IV)getppid();
4210 /* touch @F array to prevent spurious warnings 20020415 MJD */
4212 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4217 S_init_perllib(pTHX)
4221 const char *perl5lib = NULL;
4224 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4230 perl5lib = PerlEnv_getenv("PERL5LIB");
4232 * It isn't possible to delete an environment variable with
4233 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4234 * case we treat PERL5LIB as undefined if it has a zero-length value.
4236 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4237 if (perl5lib && *perl5lib != '\0')
4241 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4243 s = PerlEnv_getenv("PERLLIB");
4245 incpush_use_sep(s, 0, 0);
4248 /* Treat PERL5?LIB as a possible search list logical name -- the
4249 * "natural" VMS idiom for a Unix path string. We allow each
4250 * element to be a set of |-separated directories for compatibility.
4254 if (my_trnlnm("PERL5LIB",buf,0))
4256 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4257 } while (my_trnlnm("PERL5LIB",buf,++idx));
4259 while (my_trnlnm("PERLLIB",buf,idx++))
4260 incpush_use_sep(buf, 0, 0);
4265 #ifndef PERL_IS_MINIPERL
4266 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4267 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4269 /* Use the ~-expanded versions of APPLLIB (undocumented),
4270 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4273 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4274 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4278 /* sitearch is always relative to sitelib on Windows for
4279 * DLL-based path intuition to work correctly */
4280 # if !defined(WIN32)
4281 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4282 INCPUSH_CAN_RELOCATE);
4288 /* this picks up sitearch as well */
4289 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4291 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4293 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4297 #ifdef PERL_VENDORARCH_EXP
4298 /* vendorarch is always relative to vendorlib on Windows for
4299 * DLL-based path intuition to work correctly */
4300 # if !defined(WIN32)
4301 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4302 INCPUSH_CAN_RELOCATE);
4306 #ifdef PERL_VENDORLIB_EXP
4308 /* this picks up vendorarch as well */
4309 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4311 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4313 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4314 INCPUSH_CAN_RELOCATE);
4319 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4323 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4327 s = win32_get_privlib(PERL_FS_VERSION, &len);
4329 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4332 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4334 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4338 #ifdef PERL_OTHERLIBDIRS
4339 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4340 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4341 |INCPUSH_CAN_RELOCATE);
4347 * It isn't possible to delete an environment variable with
4348 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4349 * case we treat PERL5LIB as undefined if it has a zero-length value.
4351 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4352 if (perl5lib && *perl5lib != '\0')
4356 incpush_use_sep(perl5lib, 0,
4357 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4359 /* Treat PERL5?LIB as a possible search list logical name -- the
4360 * "natural" VMS idiom for a Unix path string. We allow each
4361 * element to be a set of |-separated directories for compatibility.
4365 if (my_trnlnm("PERL5LIB",buf,0))
4367 incpush_use_sep(buf, 0,
4368 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4369 } while (my_trnlnm("PERL5LIB",buf,++idx));
4373 /* Use the ~-expanded versions of APPLLIB (undocumented),
4374 SITELIB and VENDORLIB for older versions
4377 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4378 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4381 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4382 /* Search for version-specific dirs below here */
4383 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4384 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4388 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4389 /* Search for version-specific dirs below here */
4390 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4391 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4394 #ifdef PERL_OTHERLIBDIRS
4395 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4396 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4397 |INCPUSH_CAN_RELOCATE);
4399 #endif /* !PERL_IS_MINIPERL */
4402 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4405 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4406 # define PERLLIB_SEP ';'
4409 # define PERLLIB_SEP '|'
4411 # define PERLLIB_SEP ':'
4414 #ifndef PERLLIB_MANGLE
4415 # define PERLLIB_MANGLE(s,n) (s)
4418 #ifndef PERL_IS_MINIPERL
4419 /* Push a directory onto @INC if it exists.
4420 Generate a new SV if we do this, to save needing to copy the SV we push
4423 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4428 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4430 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4431 S_ISDIR(tmpstatbuf.st_mode)) {
4433 dir = newSVsv(stem);
4435 /* Truncate dir back to stem. */
4436 SvCUR_set(dir, SvCUR(stem));
4443 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4445 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4448 PERL_ARGS_ASSERT_MAYBERELOCATE;
4452 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4453 defined to so something (in os2/os2.c), but the code has been
4454 this way, ignoring any possible changed of length, since
4455 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4457 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4459 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4466 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4468 while (unix[len-1] == '/') len--; /* Cosmetic */
4469 sv_usepvn(libdir,unix,len);
4472 PerlIO_printf(Perl_error_log,
4473 "Failed to unixify @INC element \"%s\"\n",
4474 SvPV_nolen_const(libdir));
4478 /* Do the if() outside the #ifdef to avoid warnings about an unused
4481 #ifdef PERL_RELOCATABLE_INC
4483 * Relocatable include entries are marked with a leading .../
4486 * 0: Remove that leading ".../"
4487 * 1: Remove trailing executable name (anything after the last '/')
4488 * from the perl path to give a perl prefix
4490 * While the @INC element starts "../" and the prefix ends with a real
4491 * directory (ie not . or ..) chop that real directory off the prefix
4492 * and the leading "../" from the @INC element. ie a logical "../"
4494 * Finally concatenate the prefix and the remainder of the @INC element
4495 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4496 * generates /usr/local/lib/perl5
4498 const char *libpath = SvPVX(libdir);
4499 STRLEN libpath_len = SvCUR(libdir);
4500 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4502 SV * const caret_X = get_sv("\030", 0);
4503 /* Going to use the SV just as a scratch buffer holding a C
4509 /* $^X is *the* source of taint if tainting is on, hence
4510 SvPOK() won't be true. */
4512 assert(SvPOKp(caret_X));
4513 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4515 /* Firstly take off the leading .../
4516 If all else fail we'll do the paths relative to the current
4518 sv_chop(libdir, libpath + 4);
4519 /* Don't use SvPV as we're intentionally bypassing taining,
4520 mortal copies that the mg_get of tainting creates, and
4521 corruption that seems to come via the save stack.
4522 I guess that the save stack isn't correctly set up yet. */
4523 libpath = SvPVX(libdir);
4524 libpath_len = SvCUR(libdir);
4526 /* This would work more efficiently with memrchr, but as it's
4527 only a GNU extension we'd need to probe for it and
4528 implement our own. Not hard, but maybe not worth it? */
4530 prefix = SvPVX(prefix_sv);
4531 lastslash = strrchr(prefix, '/');
4533 /* First time in with the *lastslash = '\0' we just wipe off
4534 the trailing /perl from (say) /usr/foo/bin/perl
4538 while ((*lastslash = '\0'), /* Do that, come what may. */
4539 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4540 && (lastslash = strrchr(prefix, '/')))) {
4541 if (lastslash[1] == '\0'
4542 || (lastslash[1] == '.'
4543 && (lastslash[2] == '/' /* ends "/." */
4544 || (lastslash[2] == '/'
4545 && lastslash[3] == '/' /* or "/.." */
4547 /* Prefix ends "/" or "/." or "/..", any of which
4548 are fishy, so don't do any more logical cleanup.
4552 /* Remove leading "../" from path */
4555 /* Next iteration round the loop removes the last
4556 directory name from prefix by writing a '\0' in
4557 the while clause. */
4559 /* prefix has been terminated with a '\0' to the correct
4560 length. libpath points somewhere into the libdir SV.
4561 We need to join the 2 with '/' and drop the result into
4563 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4564 SvREFCNT_dec(libdir);
4565 /* And this is the new libdir. */
4568 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4569 /* Need to taint relocated paths if running set ID */
4570 SvTAINTED_on(libdir);
4573 SvREFCNT_dec(prefix_sv);
4581 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4584 #ifndef PERL_IS_MINIPERL
4585 const U8 using_sub_dirs
4586 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4587 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4588 const U8 add_versioned_sub_dirs
4589 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4590 const U8 add_archonly_sub_dirs
4591 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4592 #ifdef PERL_INC_VERSION_LIST
4593 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4596 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4597 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4598 AV *const inc = GvAVn(PL_incgv);
4600 PERL_ARGS_ASSERT_INCPUSH;
4603 /* Could remove this vestigial extra block, if we don't mind a lot of
4604 re-indenting diff noise. */
4606 SV *const libdir = mayberelocate(dir, len, flags);
4607 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4608 arranged to unshift #! line -I onto the front of @INC. However,
4609 -I can add version and architecture specific libraries, and they
4610 need to go first. The old code assumed that it was always
4611 pushing. Hence to make it work, need to push the architecture
4612 (etc) libraries onto a temporary array, then "unshift" that onto
4613 the front of @INC. */
4614 #ifndef PERL_IS_MINIPERL
4615 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4618 * BEFORE pushing libdir onto @INC we may first push version- and
4619 * archname-specific sub-directories.
4621 if (using_sub_dirs) {
4622 SV *subdir = newSVsv(libdir);
4623 #ifdef PERL_INC_VERSION_LIST
4624 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4625 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4626 const char * const *incver;
4629 if (add_versioned_sub_dirs) {
4630 /* .../version/archname if -d .../version/archname */
4631 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4632 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4634 /* .../version if -d .../version */
4635 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4636 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4639 #ifdef PERL_INC_VERSION_LIST
4641 for (incver = incverlist; *incver; incver++) {
4642 /* .../xxx if -d .../xxx */
4643 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4644 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4649 if (add_archonly_sub_dirs) {
4650 /* .../archname if -d .../archname */
4651 sv_catpvs(subdir, "/" ARCHNAME);
4652 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4656 assert (SvREFCNT(subdir) == 1);
4657 SvREFCNT_dec(subdir);
4659 #endif /* !PERL_IS_MINIPERL */
4660 /* finally add this lib directory at the end of @INC */
4662 #ifdef PERL_IS_MINIPERL
4663 const U32 extra = 0;
4665 U32 extra = av_len(av) + 1;
4667 av_unshift(inc, extra + push_basedir);
4669 av_store(inc, extra, libdir);
4670 #ifndef PERL_IS_MINIPERL
4672 /* av owns a reference, av_store() expects to be donated a
4673 reference, and av expects to be sane when it's cleared.
4674 If I wanted to be naughty and wrong, I could peek inside the
4675 implementation of av_clear(), realise that it uses
4676 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4677 and so directly steal from it (with a memcpy() to inc, and
4678 then memset() to NULL them out. But people copy code from the
4679 core expecting it to be best practise, so let's use the API.
4680 Although studious readers will note that I'm not checking any
4682 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4687 else if (push_basedir) {
4688 av_push(inc, libdir);
4691 if (!push_basedir) {
4692 assert (SvREFCNT(libdir) == 1);
4693 SvREFCNT_dec(libdir);
4699 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4703 /* This logic has been broken out from S_incpush(). It may be possible to
4706 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4708 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4709 * argument to incpush_use_sep. This allows creation of relocatable
4710 * Perl distributions that patch the binary at install time. Those
4711 * distributions will have to provide their own relocation tools; this
4712 * is not a feature otherwise supported by core Perl.
4714 #ifndef PERL_RELOCATABLE_INCPUSH
4721 /* Break at all separators */
4722 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4724 /* skip any consecutive separators */
4726 /* Uncomment the next line for PATH semantics */
4727 /* But you'll need to write tests */
4728 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4730 incpush(p, (STRLEN)(s - p), flags);
4735 incpush(p, (STRLEN)(end - p), flags);
4740 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4744 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4750 PERL_ARGS_ASSERT_CALL_LIST;
4752 while (av_len(paramList) >= 0) {
4753 cv = MUTABLE_CV(av_shift(paramList));
4755 if (paramList == PL_beginav) {
4756 /* save PL_beginav for compiler */
4757 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4759 else if (paramList == PL_checkav) {
4760 /* save PL_checkav for compiler */
4761 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4763 else if (paramList == PL_unitcheckav) {
4764 /* save PL_unitcheckav for compiler */
4765 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4776 PL_madskills |= 16384;
4781 PL_madskills &= ~16384;
4784 (void)SvPV_const(atsv, len);
4786 PL_curcop = &PL_compiling;
4787 CopLINE_set(PL_curcop, oldline);
4788 if (paramList == PL_beginav)
4789 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4791 Perl_sv_catpvf(aTHX_ atsv,
4792 "%s failed--call queue aborted",
4793 paramList == PL_checkav ? "CHECK"
4794 : paramList == PL_initav ? "INIT"
4795 : paramList == PL_unitcheckav ? "UNITCHECK"
4797 while (PL_scopestack_ix > oldscope)
4800 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4807 /* my_exit() was called */
4808 while (PL_scopestack_ix > oldscope)
4811 SET_CURSTASH(PL_defstash);
4812 PL_curcop = &PL_compiling;
4813 CopLINE_set(PL_curcop, oldline);
4819 PL_curcop = &PL_compiling;
4820 CopLINE_set(PL_curcop, oldline);
4823 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4832 Perl_my_exit(pTHX_ U32 status)
4843 STATUS_EXIT_SET(status);
4850 Perl_my_failure_exit(pTHX)
4854 /* We have been called to fall on our sword. The desired exit code
4855 * should be already set in STATUS_UNIX, but could be shifted over
4856 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4859 * If an error code has not been set, then force the issue.
4861 if (MY_POSIX_EXIT) {
4863 /* According to the die_exit.t tests, if errno is non-zero */
4864 /* It should be used for the error status. */
4866 if (errno == EVMSERR) {
4867 STATUS_NATIVE = vaxc$errno;
4870 /* According to die_exit.t tests, if the child_exit code is */
4871 /* also zero, then we need to exit with a code of 255 */
4872 if ((errno != 0) && (errno < 256))
4873 STATUS_UNIX_EXIT_SET(errno);
4874 else if (STATUS_UNIX < 255) {
4875 STATUS_UNIX_EXIT_SET(255);
4880 /* The exit code could have been set by $? or vmsish which
4881 * means that it may not have fatal set. So convert
4882 * success/warning codes to fatal with out changing
4883 * the POSIX status code. The severity makes VMS native
4884 * status handling work, while UNIX mode programs use the
4885 * the POSIX exit codes.
4887 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4888 STATUS_NATIVE &= STS$M_COND_ID;
4889 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4893 /* Traditionally Perl on VMS always expects a Fatal Error. */
4894 if (vaxc$errno & 1) {
4896 /* So force success status to failure */
4897 if (STATUS_NATIVE & 1)
4902 STATUS_UNIX = EINTR; /* In case something cares */
4907 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4909 /* Encode the severity code */
4910 severity = STATUS_NATIVE & STS$M_SEVERITY;
4911 STATUS_UNIX = (severity ? severity : 1) << 8;
4913 /* Perl expects this to be a fatal error */
4914 if (severity != STS$K_SEVERE)
4923 STATUS_UNIX_SET(errno);
4925 exitstatus = STATUS_UNIX >> 8;
4926 if (exitstatus & 255)
4927 STATUS_UNIX_SET(exitstatus);
4929 STATUS_UNIX_SET(255);
4936 S_my_exit_jump(pTHX)
4941 SvREFCNT_dec(PL_e_script);
4945 POPSTACK_TO(PL_mainstack);
4953 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4956 const char * const p = SvPVX_const(PL_e_script);
4957 const char *nl = strchr(p, '\n');
4959 PERL_UNUSED_ARG(idx);
4960 PERL_UNUSED_ARG(maxlen);
4962 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4964 filter_del(read_e_script);
4967 sv_catpvn(buf_sv, p, nl-p);
4968 sv_chop(PL_e_script, nl);
4974 * c-indentation-style: bsd
4976 * indent-tabs-mode: t
4979 * ex: set ts=8 sts=4 sw=4 noet: