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 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
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 # define validate_suid(rsfp) NOOP
82 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
85 #define CALL_BODY_SUB(myop) \
86 if (PL_op == (myop)) \
87 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
91 #define CALL_LIST_BODY(cv) \
92 PUSHMARK(PL_stack_sp); \
93 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
96 S_init_tls_and_interp(PerlInterpreter *my_perl)
100 PERL_SET_INTERP(my_perl);
101 #if defined(USE_ITHREADS)
104 PERL_SET_THX(my_perl);
108 MUTEX_INIT(&PL_dollarzero_mutex);
109 MUTEX_INIT(&PL_my_ctx_mutex);
112 #if defined(USE_ITHREADS)
115 /* This always happens for non-ithreads */
118 PERL_SET_THX(my_perl);
123 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
126 Perl_sys_init(int* argc, char*** argv)
130 PERL_ARGS_ASSERT_SYS_INIT;
132 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
133 PERL_UNUSED_ARG(argv);
134 PERL_SYS_INIT_BODY(argc, argv);
138 Perl_sys_init3(int* argc, char*** argv, char*** env)
142 PERL_ARGS_ASSERT_SYS_INIT3;
144 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
145 PERL_UNUSED_ARG(argv);
146 PERL_UNUSED_ARG(env);
147 PERL_SYS_INIT3_BODY(argc, argv, env);
154 if (!PL_veto_cleanup) {
155 PERL_SYS_TERM_BODY();
160 #ifdef PERL_IMPLICIT_SYS
162 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
163 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
164 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
165 struct IPerlDir* ipD, struct IPerlSock* ipS,
166 struct IPerlProc* ipP)
168 PerlInterpreter *my_perl;
170 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
172 /* Newx() needs interpreter, so call malloc() instead */
173 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
174 S_init_tls_and_interp(my_perl);
175 Zero(my_perl, 1, PerlInterpreter);
185 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
192 =head1 Embedding Functions
194 =for apidoc perl_alloc
196 Allocates a new Perl interpreter. See L<perlembed>.
204 PerlInterpreter *my_perl;
206 /* Newx() needs interpreter, so call malloc() instead */
207 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
209 S_init_tls_and_interp(my_perl);
210 #ifndef PERL_TRACK_MEMPOOL
211 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
213 Zero(my_perl, 1, PerlInterpreter);
214 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
218 #endif /* PERL_IMPLICIT_SYS */
221 =for apidoc perl_construct
223 Initializes a new Perl interpreter. See L<perlembed>.
229 perl_construct(pTHXx)
233 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
237 PL_perl_destruct_level = 1;
239 PERL_UNUSED_ARG(my_perl);
240 if (PL_perl_destruct_level > 0)
243 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
245 /* set read-only and try to insure than we wont see REFCNT==0
248 SvREADONLY_on(&PL_sv_undef);
249 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
251 sv_setpv(&PL_sv_no,PL_No);
252 /* value lookup in void context - happens to have the side effect
253 of caching the numeric forms. However, as &PL_sv_no doesn't contain
254 a string that is a valid numer, we have to turn the public flags by
260 SvREADONLY_on(&PL_sv_no);
261 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
263 sv_setpv(&PL_sv_yes,PL_Yes);
266 SvREADONLY_on(&PL_sv_yes);
267 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
269 SvREADONLY_on(&PL_sv_placeholder);
270 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
272 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
273 #ifdef PERL_USES_PL_PIDSTATUS
274 PL_pidstatus = newHV();
277 PL_rs = newSVpvs("\n");
287 SET_NUMERIC_STANDARD();
289 #if defined(LOCAL_PATCH_COUNT)
290 PL_localpatches = local_patches; /* For possible -v */
293 #ifdef HAVE_INTERP_INTERN
297 PerlIO_init(aTHX); /* Hook to IO system */
299 PL_fdpid = newAV(); /* for remembering popen pids by fd */
300 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
301 PL_errors = newSVpvs("");
302 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
303 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
304 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
306 /* First entry is a list of empty elements. It needs to be initialised
307 else all hell breaks loose in S_find_uninit_var(). */
308 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
309 PL_regex_pad = AvARRAY(PL_regex_padav);
310 Newxz(PL_stashpad, PL_stashpadmax, HV *);
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);
833 /* The exit() function will do everything that needs doing. */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
843 SvREFCNT_dec(PL_regex_padav);
844 PL_regex_padav = NULL;
846 Safefree(PL_stashpad);
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);
1029 /* Prepare to destruct main symbol table. */
1032 /* break ref loop *:: <=> %:: */
1033 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1036 SvREFCNT_dec(PL_curstname);
1037 PL_curstname = NULL;
1039 /* clear queued errors */
1040 SvREFCNT_dec(PL_errors);
1043 SvREFCNT_dec(PL_isarev);
1046 if (destruct_level >= 2) {
1047 if (PL_scopestack_ix != 0)
1048 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1049 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1050 (long)PL_scopestack_ix);
1051 if (PL_savestack_ix != 0)
1052 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1053 "Unbalanced saves: %ld more saves than restores\n",
1054 (long)PL_savestack_ix);
1055 if (PL_tmps_floor != -1)
1056 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1057 (long)PL_tmps_floor + 1);
1058 if (cxstack_ix != -1)
1059 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1060 (long)cxstack_ix + 1);
1063 #ifdef PERL_IMPLICIT_CONTEXT
1064 /* the entries in this list are allocated via SV PVX's, so get freed
1065 * in sv_clean_all */
1066 Safefree(PL_my_cxt_list);
1069 /* Now absolutely destruct everything, somehow or other, loops or no. */
1071 /* the 2 is for PL_fdpid and PL_strtab */
1072 while (sv_clean_all() > 2)
1075 AvREAL_off(PL_fdpid); /* no surviving entries */
1076 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1079 #ifdef HAVE_INTERP_INTERN
1083 /* Destruct the global string table. */
1085 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1086 * so that sv_free() won't fail on them.
1087 * Now that the global string table is using a single hunk of memory
1088 * for both HE and HEK, we either need to explicitly unshare it the
1089 * correct way, or actually free things here.
1092 const I32 max = HvMAX(PL_strtab);
1093 HE * const * const array = HvARRAY(PL_strtab);
1094 HE *hent = array[0];
1097 if (hent && ckWARN_d(WARN_INTERNAL)) {
1098 HE * const next = HeNEXT(hent);
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1100 "Unbalanced string table refcount: (%ld) for \"%s\"",
1101 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1108 hent = array[riter];
1113 HvARRAY(PL_strtab) = 0;
1114 HvTOTALKEYS(PL_strtab) = 0;
1116 SvREFCNT_dec(PL_strtab);
1119 /* free the pointer tables used for cloning */
1120 ptr_table_free(PL_ptr_table);
1121 PL_ptr_table = (PTR_TBL_t*)NULL;
1124 /* free special SVs */
1126 SvREFCNT(&PL_sv_yes) = 0;
1127 sv_clear(&PL_sv_yes);
1128 SvANY(&PL_sv_yes) = NULL;
1129 SvFLAGS(&PL_sv_yes) = 0;
1131 SvREFCNT(&PL_sv_no) = 0;
1132 sv_clear(&PL_sv_no);
1133 SvANY(&PL_sv_no) = NULL;
1134 SvFLAGS(&PL_sv_no) = 0;
1138 for (i=0; i<=2; i++) {
1139 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1140 sv_clear(PERL_DEBUG_PAD(i));
1141 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1142 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1146 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1147 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1149 #ifdef DEBUG_LEAKING_SCALARS
1150 if (PL_sv_count != 0) {
1155 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1156 svend = &sva[SvREFCNT(sva)];
1157 for (sv = sva + 1; sv < svend; ++sv) {
1158 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1159 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1161 " refcnt=%"UVuf pTHX__FORMAT "\n"
1162 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1164 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1166 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1168 sv->sv_debug_inpad ? "for" : "by",
1169 sv->sv_debug_optype ?
1170 PL_op_name[sv->sv_debug_optype]: "(none)",
1171 PTR2UV(sv->sv_debug_parent),
1174 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1175 Perl_dump_sv_child(aTHX_ sv);
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1185 /* Wait for up to 4 seconds for child to terminate.
1186 This seems to be the least effort way of timing out on reaping
1188 struct timeval waitfor = {4, 0};
1189 int sock = PL_dumper_fd;
1193 FD_SET(sock, &rset);
1194 select(sock + 1, &rset, NULL, NULL, &waitfor);
1195 waitpid(child, &status, WNOHANG);
1200 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1206 #ifdef PERL_DEBUG_READONLY_OPS
1212 #if defined(PERLIO_LAYERS)
1213 /* No more IO - including error messages ! */
1214 PerlIO_cleanup(aTHX);
1217 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1218 as currently layers use it rather than NULL as a marker
1219 for no arg - and will try and SvREFCNT_dec it.
1221 SvREFCNT(&PL_sv_undef) = 0;
1222 SvREADONLY_off(&PL_sv_undef);
1224 Safefree(PL_origfilename);
1225 PL_origfilename = NULL;
1226 Safefree(PL_reg_start_tmp);
1227 PL_reg_start_tmp = (char**)NULL;
1228 PL_reg_start_tmpl = 0;
1229 Safefree(PL_reg_curpm);
1230 Safefree(PL_reg_poscache);
1231 free_tied_hv_pool();
1232 Safefree(PL_op_mask);
1233 Safefree(PL_psig_name);
1234 PL_psig_name = (SV**)NULL;
1235 PL_psig_ptr = (SV**)NULL;
1237 /* We need to NULL PL_psig_pend first, so that
1238 signal handlers know not to use it */
1239 int *psig_save = PL_psig_pend;
1240 PL_psig_pend = (int*)NULL;
1241 Safefree(psig_save);
1245 PL_tainting = FALSE;
1246 PL_taint_warn = FALSE;
1247 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1250 DEBUG_P(debprofdump());
1252 #ifdef USE_REENTRANT_API
1253 Perl_reentrant_free(aTHX);
1258 while (PL_regmatch_slab) {
1259 regmatch_slab *s = PL_regmatch_slab;
1260 PL_regmatch_slab = PL_regmatch_slab->next;
1264 /* As the absolutely last thing, free the non-arena SV for mess() */
1267 /* we know that type == SVt_PVMG */
1269 /* it could have accumulated taint magic */
1272 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1273 moremagic = mg->mg_moremagic;
1274 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1276 Safefree(mg->mg_ptr);
1280 /* we know that type >= SVt_PV */
1281 SvPV_free(PL_mess_sv);
1282 Safefree(SvANY(PL_mess_sv));
1283 Safefree(PL_mess_sv);
1290 =for apidoc perl_free
1292 Releases a Perl interpreter. See L<perlembed>.
1302 PERL_ARGS_ASSERT_PERL_FREE;
1304 if (PL_veto_cleanup)
1307 #ifdef PERL_TRACK_MEMPOOL
1310 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1311 * value as we're probably hunting memory leaks then
1313 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1314 if (!s || atoi(s) == 0) {
1315 const U32 old_debug = PL_debug;
1316 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1317 thread at thread exit. */
1319 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1320 "free this thread's memory\n");
1321 PL_debug &= ~ DEBUG_m_FLAG;
1323 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1324 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1325 PL_debug = old_debug;
1330 #if defined(WIN32) || defined(NETWARE)
1331 # if defined(PERL_IMPLICIT_SYS)
1334 void *host = nw_internal_host;
1336 void *host = w32_internal_host;
1338 PerlMem_free(aTHXx);
1340 nw_delete_internal_host(host);
1342 win32_delete_internal_host(host);
1346 PerlMem_free(aTHXx);
1349 PerlMem_free(aTHXx);
1353 #if defined(USE_ITHREADS)
1354 /* provide destructors to clean up the thread key when libperl is unloaded */
1355 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1357 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1358 #pragma fini "perl_fini"
1359 #elif defined(__sun) && !defined(__GNUC__)
1360 #pragma fini (perl_fini)
1364 #if defined(__GNUC__)
1365 __attribute__((destructor))
1370 if (PL_curinterp && !PL_veto_cleanup)
1375 #endif /* THREADS */
1378 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1381 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1382 PL_exitlist[PL_exitlistlen].fn = fn;
1383 PL_exitlist[PL_exitlistlen].ptr = ptr;
1388 S_set_caret_X(pTHX) {
1390 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1392 SV *const caret_x = GvSV(tmpgv);
1394 sv_setpv(caret_x, os2_execname(aTHX));
1396 # ifdef USE_KERN_PROC_PATHNAME
1401 mib[2] = KERN_PROC_PATHNAME;
1404 if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
1405 && size > 0 && size < MAXPATHLEN * MAXPATHLEN) {
1406 sv_grow(caret_x, size);
1408 if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
1410 SvPOK_only(caret_x);
1411 SvCUR_set(caret_x, size - 1);
1416 # elif defined(USE_NSGETEXECUTABLEPATH)
1418 uint32_t size = sizeof(buf);
1420 _NSGetExecutablePath(buf, &size);
1421 if (size < MAXPATHLEN * MAXPATHLEN) {
1422 sv_grow(caret_x, size);
1423 if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
1424 char *const tidied = realpath(SvPVX(caret_x), NULL);
1426 sv_setpv(caret_x, tidied);
1429 SvPOK_only(caret_x);
1430 SvCUR_set(caret_x, size);
1435 # elif defined(HAS_PROCSELFEXE)
1436 char buf[MAXPATHLEN];
1437 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1439 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1440 includes a spurious NUL which will cause $^X to fail in system
1441 or backticks (this will prevent extensions from being built and
1442 many tests from working). readlink is not meant to add a NUL.
1443 Normal readlink works fine.
1445 if (len > 0 && buf[len-1] == '\0') {
1449 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1450 returning the text "unknown" from the readlink rather than the path
1451 to the executable (or returning an error from the readlink). Any
1452 valid path has a '/' in it somewhere, so use that to validate the
1453 result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1455 if (len > 0 && memchr(buf, '/', len)) {
1456 sv_setpvn(caret_x, buf, len);
1460 /* Fallback to this: */
1461 sv_setpv(caret_x, PL_origargv[0]);
1467 =for apidoc perl_parse
1469 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1474 #define SET_CURSTASH(newstash) \
1475 if (PL_curstash != newstash) { \
1476 SvREFCNT_dec(PL_curstash); \
1477 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1481 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1488 PERL_ARGS_ASSERT_PERL_PARSE;
1489 #ifndef MULTIPLICITY
1490 PERL_UNUSED_ARG(my_perl);
1493 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1494 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1495 * This MUST be done before any hash stores or fetches take place.
1496 * If you set PL_rehash_seed (and presumably also PL_rehash_seed_set)
1497 * yourself, it is your responsibility to provide a good random seed!
1498 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1499 if (!PL_rehash_seed_set)
1500 PL_rehash_seed = get_hash_seed();
1502 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1504 if (s && (atoi(s) == 1))
1505 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1507 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1512 if (PL_origalen != 0) {
1513 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1516 /* Set PL_origalen be the sum of the contiguous argv[]
1517 * elements plus the size of the env in case that it is
1518 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1519 * as the maximum modifiable length of $0. In the worst case
1520 * the area we are able to modify is limited to the size of
1521 * the original argv[0]. (See below for 'contiguous', though.)
1523 const char *s = NULL;
1526 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1527 /* Do the mask check only if the args seem like aligned. */
1529 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1531 /* See if all the arguments are contiguous in memory. Note
1532 * that 'contiguous' is a loose term because some platforms
1533 * align the argv[] and the envp[]. If the arguments look
1534 * like non-aligned, assume that they are 'strictly' or
1535 * 'traditionally' contiguous. If the arguments look like
1536 * aligned, we just check that they are within aligned
1537 * PTRSIZE bytes. As long as no system has something bizarre
1538 * like the argv[] interleaved with some other data, we are
1539 * fine. (Did I just evoke Murphy's Law?) --jhi */
1540 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1542 for (i = 1; i < PL_origargc; i++) {
1543 if ((PL_origargv[i] == s + 1
1545 || PL_origargv[i] == s + 2
1550 (PL_origargv[i] > s &&
1552 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1563 #ifndef PERL_USE_SAFE_PUTENV
1564 /* Can we grab env area too to be used as the area for $0? */
1565 if (s && PL_origenviron && !PL_use_safe_putenv) {
1566 if ((PL_origenviron[0] == s + 1)
1569 (PL_origenviron[0] > s &&
1570 PL_origenviron[0] <=
1571 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1574 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1575 s = PL_origenviron[0];
1578 my_setenv("NoNe SuCh", NULL);
1579 /* Force copy of environment. */
1580 for (i = 1; PL_origenviron[i]; i++) {
1581 if (PL_origenviron[i] == s + 1
1584 (PL_origenviron[i] > s &&
1585 PL_origenviron[i] <=
1586 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1589 s = PL_origenviron[i];
1597 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1599 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1604 /* Come here if running an undumped a.out. */
1606 PL_origfilename = savepv(argv[0]);
1607 PL_do_undump = FALSE;
1608 cxstack_ix = -1; /* start label stack again */
1610 assert (!PL_tainted);
1612 S_set_caret_X(aTHX);
1614 init_postdump_symbols(argc,argv,env);
1619 op_free(PL_main_root);
1620 PL_main_root = NULL;
1622 PL_main_start = NULL;
1623 SvREFCNT_dec(PL_main_cv);
1627 oldscope = PL_scopestack_ix;
1628 PL_dowarn = G_WARN_OFF;
1633 parse_body(env,xsinit);
1634 if (PL_unitcheckav) {
1635 call_list(oldscope, PL_unitcheckav);
1638 PERL_SET_PHASE(PERL_PHASE_CHECK);
1639 call_list(oldscope, PL_checkav);
1647 /* my_exit() was called */
1648 while (PL_scopestack_ix > oldscope)
1651 SET_CURSTASH(PL_defstash);
1652 if (PL_unitcheckav) {
1653 call_list(oldscope, PL_unitcheckav);
1656 PERL_SET_PHASE(PERL_PHASE_CHECK);
1657 call_list(oldscope, PL_checkav);
1662 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1670 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1671 miniperl, and we need to see those flags reflected in the values here. */
1673 /* What this returns is subject to change. Use the public interface in Config.
1676 S_Internals_V(pTHX_ CV *cv)
1679 #ifdef LOCAL_PATCH_COUNT
1680 const int local_patch_count = LOCAL_PATCH_COUNT;
1682 const int local_patch_count = 0;
1684 const int entries = 3 + local_patch_count;
1686 static char non_bincompat_options[] =
1693 # ifdef PERL_DISABLE_PMC
1696 # ifdef PERL_DONT_CREATE_GVSV
1697 " PERL_DONT_CREATE_GVSV"
1699 # ifdef PERL_EXTERNAL_GLOB
1700 " PERL_EXTERNAL_GLOB"
1702 # ifdef PERL_IS_MINIPERL
1705 # ifdef PERL_MALLOC_WRAP
1708 # ifdef PERL_MEM_LOG
1711 # ifdef PERL_MEM_LOG_NOIMPL
1712 " PERL_MEM_LOG_NOIMPL"
1714 # ifdef PERL_PRESERVE_IVUV
1715 " PERL_PRESERVE_IVUV"
1717 # ifdef PERL_RELOCATABLE_INCPUSH
1718 " PERL_RELOCATABLE_INCPUSH"
1720 # ifdef PERL_USE_DEVEL
1723 # ifdef PERL_USE_SAFE_PUTENV
1724 " PERL_USE_SAFE_PUTENV"
1726 # ifdef UNLINK_ALL_VERSIONS
1727 " UNLINK_ALL_VERSIONS"
1729 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1730 " USE_ATTRIBUTES_FOR_PERLIO"
1732 # ifdef USE_FAST_STDIO
1738 # ifdef USE_LOCALE_CTYPE
1741 # ifdef USE_PERL_ATOF
1744 # ifdef USE_SITECUSTOMIZE
1745 " USE_SITECUSTOMIZE"
1748 PERL_UNUSED_ARG(cv);
1749 PERL_UNUSED_ARG(items);
1751 EXTEND(SP, entries);
1753 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1754 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1755 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1759 PUSHs(Perl_newSVpvn_flags(aTHX_
1760 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1763 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1767 PUSHs(&PL_sv_undef);
1770 for (i = 1; i <= local_patch_count; i++) {
1771 /* This will be an undef, if PL_localpatches[i] is NULL. */
1772 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1778 #define INCPUSH_UNSHIFT 0x01
1779 #define INCPUSH_ADD_OLD_VERS 0x02
1780 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1781 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1782 #define INCPUSH_NOT_BASEDIR 0x10
1783 #define INCPUSH_CAN_RELOCATE 0x20
1784 #define INCPUSH_ADD_SUB_DIRS \
1785 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1788 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1792 int argc = PL_origargc;
1793 char **argv = PL_origargv;
1794 const char *scriptname = NULL;
1795 VOL bool dosearch = FALSE;
1797 bool doextract = FALSE;
1798 const char *cddir = NULL;
1799 #ifdef USE_SITECUSTOMIZE
1800 bool minus_f = FALSE;
1802 SV *linestr_sv = NULL;
1803 bool add_read_e_script = FALSE;
1804 U32 lex_start_flags = 0;
1806 PERL_SET_PHASE(PERL_PHASE_START);
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;
2038 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2039 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2040 INCPUSH_CAN_RELOCATE);
2041 const char *const sitelib = SvPVX(sitelib_sv);
2042 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2044 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2047 assert (SvREFCNT(sitelib_sv) == 1);
2048 SvREFCNT_dec(sitelib_sv);
2055 scriptname = argv[0];
2058 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2060 else if (scriptname == NULL) {
2062 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2068 assert (!PL_tainted);
2072 bool suidscript = FALSE;
2074 rsfp = open_script(scriptname, dosearch, &suidscript);
2076 rsfp = PerlIO_stdin();
2077 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2080 validate_suid(rsfp);
2083 # if defined(SIGCHLD) || defined(SIGCLD)
2086 # define SIGCHLD SIGCLD
2088 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2089 if (sigstate == (Sighandler_t) SIG_IGN) {
2090 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2091 "Can't ignore signal CHLD, forcing to default");
2092 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2100 /* This will croak if suidscript is true, as -x cannot be used with
2102 forbid_setid('x', suidscript);
2103 /* Hence you can't get here if suidscript is true */
2105 linestr_sv = newSV_type(SVt_PV);
2106 lex_start_flags |= LEX_START_COPIED;
2107 find_beginning(linestr_sv, rsfp);
2108 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2109 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2113 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2114 CvUNIQUE_on(PL_compcv);
2116 CvPADLIST(PL_compcv) = pad_new(0);
2118 PL_isarev = newHV();
2121 boot_core_UNIVERSAL();
2123 newXS("Internals::V", S_Internals_V, __FILE__);
2126 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2128 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2134 # ifdef HAS_SOCKS5_INIT
2135 socks5_init(argv[0]);
2141 init_predump_symbols();
2142 /* init_postdump_symbols not currently designed to be called */
2143 /* more than once (ENV isn't cleared first, for example) */
2144 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2146 init_postdump_symbols(argc,argv,env);
2148 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2149 * or explicitly in some platforms.
2150 * locale.c:Perl_init_i18nl10n() if the environment
2151 * look like the user wants to use UTF-8. */
2152 #if defined(__SYMBIAN32__)
2153 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2155 # ifndef PERL_IS_MINIPERL
2157 /* Requires init_predump_symbols(). */
2158 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2163 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2164 * and the default open disciplines. */
2165 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2166 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2168 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2169 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2170 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2172 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2173 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2174 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2176 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2177 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2178 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2180 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2181 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2184 sv_setpvs(sv, ":utf8\0:utf8");
2186 sv_setpvs(sv, ":utf8\0");
2189 sv_setpvs(sv, "\0:utf8");
2198 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2199 if (strEQ(s, "unsafe"))
2200 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2201 else if (strEQ(s, "safe"))
2202 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2204 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2211 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2215 PL_xmlfp = PerlIO_stdout();
2217 PL_xmlfp = PerlIO_open(s, "w");
2219 Perl_croak(aTHX_ "Can't open %s", s);
2221 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2227 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2228 PL_madskills = atoi(s);
2229 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2234 lex_start(linestr_sv, rsfp, lex_start_flags);
2236 SvREFCNT_dec(linestr_sv);
2238 PL_subname = newSVpvs("main");
2240 if (add_read_e_script)
2241 filter_add(read_e_script, NULL);
2243 /* now parse the script */
2245 SETERRNO(0,SS_NORMAL);
2246 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2248 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2250 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2254 CopLINE_set(PL_curcop, 0);
2255 SET_CURSTASH(PL_defstash);
2257 SvREFCNT_dec(PL_e_script);
2265 SAVECOPFILE(PL_curcop);
2266 SAVECOPLINE(PL_curcop);
2267 gv_check(PL_defstash);
2276 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2277 dump_mstats("after compilation:");
2282 PL_restartjmpenv = NULL;
2288 =for apidoc perl_run
2290 Tells a Perl interpreter to run. See L<perlembed>.
2303 PERL_ARGS_ASSERT_PERL_RUN;
2304 #ifndef MULTIPLICITY
2305 PERL_UNUSED_ARG(my_perl);
2308 oldscope = PL_scopestack_ix;
2316 cxstack_ix = -1; /* start context stack again */
2318 case 0: /* normal completion */
2322 case 2: /* my_exit() */
2323 while (PL_scopestack_ix > oldscope)
2326 SET_CURSTASH(PL_defstash);
2327 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2328 PL_endav && !PL_minus_c) {
2329 PERL_SET_PHASE(PERL_PHASE_END);
2330 call_list(oldscope, PL_endav);
2333 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2334 dump_mstats("after execution: ");
2340 POPSTACK_TO(PL_mainstack);
2343 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2354 S_run_body(pTHX_ I32 oldscope)
2357 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2358 PL_sawampersand ? "Enabling" : "Omitting"));
2360 if (!PL_restartop) {
2364 exit(0); /* less likely to core dump than my_exit(0) */
2368 if (DEBUG_x_TEST || DEBUG_B_TEST)
2369 dump_all_perl(!DEBUG_B_TEST);
2371 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2375 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2378 if (PERLDB_SINGLE && PL_DBsingle)
2379 sv_setiv(PL_DBsingle, 1);
2381 PERL_SET_PHASE(PERL_PHASE_INIT);
2382 call_list(oldscope, PL_initav);
2384 #ifdef PERL_DEBUG_READONLY_OPS
2385 Perl_pending_Slabs_to_ro(aTHX);
2391 PERL_SET_PHASE(PERL_PHASE_RUN);
2394 PL_restartjmpenv = NULL;
2395 PL_op = PL_restartop;
2399 else if (PL_main_start) {
2400 CvDEPTH(PL_main_cv) = 1;
2401 PL_op = PL_main_start;
2409 =head1 SV Manipulation Functions
2411 =for apidoc p||get_sv
2413 Returns the SV of the specified Perl scalar. C<flags> are passed to
2414 C<gv_fetchpv>. If C<GV_ADD> is set and the
2415 Perl variable does not exist then it will be created. If C<flags> is zero
2416 and the variable does not exist then NULL is returned.
2422 Perl_get_sv(pTHX_ const char *name, I32 flags)
2426 PERL_ARGS_ASSERT_GET_SV;
2428 gv = gv_fetchpv(name, flags, SVt_PV);
2435 =head1 Array Manipulation Functions
2437 =for apidoc p||get_av
2439 Returns the AV of the specified Perl global or package array with the given
2440 name (so it won't work on lexical variables). C<flags> are passed
2441 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2442 Perl variable does not exist then it will be created. If C<flags> is zero
2443 and the variable does not exist then NULL is returned.
2445 Perl equivalent: C<@{"$name"}>.
2451 Perl_get_av(pTHX_ const char *name, I32 flags)
2453 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2455 PERL_ARGS_ASSERT_GET_AV;
2465 =head1 Hash Manipulation Functions
2467 =for apidoc p||get_hv
2469 Returns the HV of the specified Perl hash. C<flags> are passed to
2470 C<gv_fetchpv>. If C<GV_ADD> is set and the
2471 Perl variable does not exist then it will be created. If C<flags> is zero
2472 and the variable does not exist then NULL is returned.
2478 Perl_get_hv(pTHX_ const char *name, I32 flags)
2480 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2482 PERL_ARGS_ASSERT_GET_HV;
2492 =head1 CV Manipulation Functions
2494 =for apidoc p||get_cvn_flags
2496 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2497 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2498 exist then it will be declared (which has the same effect as saying
2499 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2500 then NULL is returned.
2502 =for apidoc p||get_cv
2504 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2510 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2512 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2513 /* XXX this is probably not what they think they're getting.
2514 * It has the same effect as "sub name;", i.e. just a forward
2517 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2519 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2520 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2521 return newSUB(start_subparse(FALSE, 0),
2522 newSVOP(OP_CONST, 0, sv),
2530 /* Nothing in core calls this now, but we can't replace it with a macro and
2531 move it to mathoms.c as a macro would evaluate name twice. */
2533 Perl_get_cv(pTHX_ const char *name, I32 flags)
2535 PERL_ARGS_ASSERT_GET_CV;
2537 return get_cvn_flags(name, strlen(name), flags);
2540 /* Be sure to refetch the stack pointer after calling these routines. */
2544 =head1 Callback Functions
2546 =for apidoc p||call_argv
2548 Performs a callback to the specified named and package-scoped Perl subroutine
2549 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2551 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2557 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2559 /* See G_* flags in cop.h */
2560 /* null terminated arg list */
2565 PERL_ARGS_ASSERT_CALL_ARGV;
2570 mXPUSHs(newSVpv(*argv,0));
2575 return call_pv(sub_name, flags);
2579 =for apidoc p||call_pv
2581 Performs a callback to the specified Perl sub. See L<perlcall>.
2587 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2588 /* name of the subroutine */
2589 /* See G_* flags in cop.h */
2591 PERL_ARGS_ASSERT_CALL_PV;
2593 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2597 =for apidoc p||call_method
2599 Performs a callback to the specified Perl method. The blessed object must
2600 be on the stack. See L<perlcall>.
2606 Perl_call_method(pTHX_ const char *methname, I32 flags)
2607 /* name of the subroutine */
2608 /* See G_* flags in cop.h */
2611 PERL_ARGS_ASSERT_CALL_METHOD;
2613 len = strlen(methname);
2615 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2616 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2619 /* May be called with any of a CV, a GV, or an SV containing the name. */
2621 =for apidoc p||call_sv
2623 Performs a callback to the Perl sub whose name is in the SV. See
2630 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2631 /* See G_* flags in cop.h */
2634 LOGOP myop; /* fake syntax tree node */
2639 bool oldcatch = CATCH_GET;
2641 OP* const oldop = PL_op;
2644 PERL_ARGS_ASSERT_CALL_SV;
2646 if (flags & G_DISCARD) {
2650 if (!(flags & G_WANT)) {
2651 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2656 Zero(&myop, 1, LOGOP);
2657 myop.op_next = NULL;
2658 if (!(flags & G_NOARGS))
2659 myop.op_flags |= OPf_STACKED;
2660 myop.op_flags |= OP_GIMME_REVERSE(flags);
2664 EXTEND(PL_stack_sp, 1);
2665 *++PL_stack_sp = sv;
2667 oldscope = PL_scopestack_ix;
2669 if (PERLDB_SUB && PL_curstash != PL_debstash
2670 /* Handle first BEGIN of -d. */
2671 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2672 /* Try harder, since this may have been a sighandler, thus
2673 * curstash may be meaningless. */
2674 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2675 && !(flags & G_NODEBUG))
2676 PL_op->op_private |= OPpENTERSUB_DB;
2678 if (flags & G_METHOD) {
2679 Zero(&method_op, 1, UNOP);
2680 method_op.op_next = PL_op;
2681 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2682 method_op.op_type = OP_METHOD;
2683 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2684 myop.op_type = OP_ENTERSUB;
2685 PL_op = (OP*)&method_op;
2688 if (!(flags & G_EVAL)) {
2690 CALL_BODY_SUB((OP*)&myop);
2691 retval = PL_stack_sp - (PL_stack_base + oldmark);
2692 CATCH_SET(oldcatch);
2695 myop.op_other = (OP*)&myop;
2697 create_eval_scope(flags|G_FAKINGEVAL);
2705 CALL_BODY_SUB((OP*)&myop);
2706 retval = PL_stack_sp - (PL_stack_base + oldmark);
2707 if (!(flags & G_KEEPERR)) {
2715 /* my_exit() was called */
2716 SET_CURSTASH(PL_defstash);
2723 PL_restartjmpenv = NULL;
2724 PL_op = PL_restartop;
2728 PL_stack_sp = PL_stack_base + oldmark;
2729 if ((flags & G_WANT) == G_ARRAY)
2733 *++PL_stack_sp = &PL_sv_undef;
2738 if (PL_scopestack_ix > oldscope)
2739 delete_eval_scope();
2743 if (flags & G_DISCARD) {
2744 PL_stack_sp = PL_stack_base + oldmark;
2753 /* Eval a string. The G_EVAL flag is always assumed. */
2756 =for apidoc p||eval_sv
2758 Tells Perl to C<eval> the string in the SV. It supports the same flags
2759 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2765 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2767 /* See G_* flags in cop.h */
2771 UNOP myop; /* fake syntax tree node */
2772 VOL I32 oldmark = SP - PL_stack_base;
2775 OP* const oldop = PL_op;
2778 PERL_ARGS_ASSERT_EVAL_SV;
2780 if (flags & G_DISCARD) {
2787 Zero(PL_op, 1, UNOP);
2788 EXTEND(PL_stack_sp, 1);
2789 *++PL_stack_sp = sv;
2791 if (!(flags & G_NOARGS))
2792 myop.op_flags = OPf_STACKED;
2793 myop.op_next = NULL;
2794 myop.op_type = OP_ENTEREVAL;
2795 myop.op_flags |= OP_GIMME_REVERSE(flags);
2796 if (flags & G_KEEPERR)
2797 myop.op_flags |= OPf_SPECIAL;
2799 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2800 * before a PUSHEVAL, which corrupts the stack after a croak */
2801 TAINT_PROPER("eval_sv()");
2807 if (PL_op == (OP*)(&myop)) {
2808 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2810 goto fail; /* failed in compilation */
2813 retval = PL_stack_sp - (PL_stack_base + oldmark);
2814 if (!(flags & G_KEEPERR)) {
2822 /* my_exit() was called */
2823 SET_CURSTASH(PL_defstash);
2830 PL_restartjmpenv = NULL;
2831 PL_op = PL_restartop;
2836 PL_stack_sp = PL_stack_base + oldmark;
2837 if ((flags & G_WANT) == G_ARRAY)
2841 *++PL_stack_sp = &PL_sv_undef;
2847 if (flags & G_DISCARD) {
2848 PL_stack_sp = PL_stack_base + oldmark;
2858 =for apidoc p||eval_pv
2860 Tells Perl to C<eval> the given string and return an SV* result.
2866 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2870 SV* sv = newSVpv(p, 0);
2872 PERL_ARGS_ASSERT_EVAL_PV;
2874 eval_sv(sv, G_SCALAR);
2881 if (croak_on_error && SvTRUE(ERRSV)) {
2882 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2888 /* Require a module. */
2891 =head1 Embedding Functions
2893 =for apidoc p||require_pv
2895 Tells Perl to C<require> the file named by the string argument. It is
2896 analogous to the Perl code C<eval "require '$file'">. It's even
2897 implemented that way; consider using load_module instead.
2902 Perl_require_pv(pTHX_ const char *pv)
2908 PERL_ARGS_ASSERT_REQUIRE_PV;
2910 PUSHSTACKi(PERLSI_REQUIRE);
2912 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2913 eval_sv(sv_2mortal(sv), G_DISCARD);
2919 S_usage(pTHX) /* XXX move this out into a module ? */
2921 /* This message really ought to be max 23 lines.
2922 * Removed -h because the user already knows that option. Others? */
2924 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2925 minimum of 509 character string literals. */
2926 static const char * const usage_msg[] = {
2927 " -0[octal] specify record separator (\\0, if no argument)\n"
2928 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2929 " -C[number/list] enables the listed Unicode features\n"
2930 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2931 " -d[:debugger] run program under debugger\n"
2932 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2933 " -e program one line of program (several -e's allowed, omit programfile)\n"
2934 " -E program like -e, but enables all optional features\n"
2935 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2936 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2937 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2938 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2939 " -l[octal] enable line ending processing, specifies line terminator\n"
2940 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2941 " -n assume \"while (<>) { ... }\" loop around program\n"
2942 " -p assume loop like -n but print line also, like sed\n"
2943 " -s enable rudimentary parsing for switches after programfile\n"
2944 " -S look for programfile using PATH environment variable\n",
2945 " -t enable tainting warnings\n"
2946 " -T enable tainting checks\n"
2947 " -u dump core after parsing program\n"
2948 " -U allow unsafe operations\n"
2949 " -v print version, patchlevel and license\n"
2950 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2951 " -w enable many useful warnings\n"
2952 " -W enable all warnings\n"
2953 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2954 " -X disable all warnings\n"
2956 "Run 'perldoc perl' for more help with Perl.\n\n",
2959 const char * const *p = usage_msg;
2960 PerlIO *out = PerlIO_stdout();
2963 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2966 PerlIO_puts(out, *p++);
2970 /* convert a string of -D options (or digits) into an int.
2971 * sets *s to point to the char after the options */
2975 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2977 static const char * const usage_msgd[] = {
2978 " Debugging flag values: (see also -d)\n"
2979 " p Tokenizing and parsing (with v, displays parse stack)\n"
2980 " s Stack snapshots (with v, displays all stacks)\n"
2981 " l Context (loop) stack processing\n"
2982 " t Trace execution\n"
2983 " o Method and overloading resolution\n",
2984 " c String/numeric conversions\n"
2985 " P Print profiling info, source file input state\n"
2986 " m Memory and SV allocation\n"
2987 " f Format processing\n"
2988 " r Regular expression parsing and execution\n"
2989 " x Syntax tree dump\n",
2990 " u Tainting checks\n"
2991 " H Hash dump -- usurps values()\n"
2992 " X Scratchpad allocation\n"
2995 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2996 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2997 " v Verbose: use in conjunction with other flags\n"
2998 " C Copy On Write\n"
2999 " A Consistency checks on internal structures\n"
3000 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3001 " M trace smart match resolution\n"
3002 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3007 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3010 /* if adding extra options, remember to update DEBUG_MASK */
3011 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3013 for (; isALNUM(**s); (*s)++) {
3014 const char * const d = strchr(debopts,**s);
3016 i |= 1 << (d - debopts);
3017 else if (ckWARN_d(WARN_DEBUGGING))
3018 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3019 "invalid option -D%c, use -D'' to see choices\n", **s);
3022 else if (isDIGIT(**s)) {
3024 for (; isALNUM(**s); (*s)++) ;
3026 else if (givehelp) {
3027 const char *const *p = usage_msgd;
3028 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3031 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3032 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3033 "-Dp not implemented on this platform\n");
3039 /* This routine handles any switches that can be given during run */
3042 Perl_moreswitches(pTHX_ const char *s)
3046 const char option = *s; /* used to remember option in -m/-M code */
3048 PERL_ARGS_ASSERT_MORESWITCHES;
3056 SvREFCNT_dec(PL_rs);
3057 if (s[1] == 'x' && s[2]) {
3058 const char *e = s+=2;
3064 flags = PERL_SCAN_SILENT_ILLDIGIT;
3065 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3066 if (s + numlen < e) {
3067 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3071 PL_rs = newSVpvs("");
3072 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3073 tmps = (U8*)SvPVX(PL_rs);
3074 uvchr_to_utf8(tmps, rschar);
3075 SvCUR_set(PL_rs, UNISKIP(rschar));
3080 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3081 if (rschar & ~((U8)~0))
3082 PL_rs = &PL_sv_undef;
3083 else if (!rschar && numlen >= 2)
3084 PL_rs = newSVpvs("");
3086 char ch = (char)rschar;
3087 PL_rs = newSVpvn(&ch, 1);
3090 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3095 PL_unicode = parse_unicode_opts( (const char **)&s );
3096 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3102 while (*s && !isSPACE(*s)) ++s;
3103 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3114 forbid_setid('d', FALSE);
3117 /* -dt indicates to the debugger that threads will be used */
3118 if (*s == 't' && !isALNUM(s[1])) {
3120 my_setenv("PERL5DB_THREADED", "1");
3123 /* The following permits -d:Mod to accepts arguments following an =
3124 in the fashion that -MSome::Mod does. */
3125 if (*s == ':' || *s == '=') {
3132 sv = newSVpvs("no Devel::");
3134 sv = newSVpvs("use Devel::");
3138 end = s + strlen(s);
3140 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3141 while(isALNUM(*s) || *s==':') ++s;
3143 sv_catpvn(sv, start, end - start);
3145 sv_catpvn(sv, start, s-start);
3146 /* Don't use NUL as q// delimiter here, this string goes in the
3148 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3151 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3155 PL_perldb = PERLDB_ALL;
3162 forbid_setid('D', FALSE);
3164 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3165 #else /* !DEBUGGING */
3166 if (ckWARN_d(WARN_DEBUGGING))
3167 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3168 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3169 for (s++; isALNUM(*s); s++) ;
3176 Safefree(PL_inplace);
3177 #if defined(__CYGWIN__) /* do backup extension automagically */
3178 if (*(s+1) == '\0') {
3179 PL_inplace = savepvs(".bak");
3182 #endif /* __CYGWIN__ */
3184 const char * const start = ++s;
3185 while (*s && !isSPACE(*s))
3188 PL_inplace = savepvn(start, s - start);
3192 if (*s == '-') /* Additional switches on #! line. */
3196 case 'I': /* -I handled both here and in parse_body() */
3197 forbid_setid('I', FALSE);
3199 while (*s && isSPACE(*s))
3204 /* ignore trailing spaces (possibly followed by other switches) */
3206 for (e = p; *e && !isSPACE(*e); e++) ;
3210 } while (*p && *p != '-');
3212 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3218 Perl_croak(aTHX_ "No directory specified for -I");
3224 SvREFCNT_dec(PL_ors_sv);
3230 PL_ors_sv = newSVpvs("\n");
3231 numlen = 3 + (*s == '0');
3232 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3236 if (RsPARA(PL_rs)) {
3237 PL_ors_sv = newSVpvs("\n\n");
3240 PL_ors_sv = newSVsv(PL_rs);
3245 forbid_setid('M', FALSE); /* XXX ? */
3248 forbid_setid('m', FALSE); /* XXX ? */
3253 const char *use = "use ";
3255 /* -M-foo == 'no foo' */
3256 /* Leading space on " no " is deliberate, to make both
3257 possibilities the same length. */
3258 if (*s == '-') { use = " no "; ++s; }
3259 sv = newSVpvn(use,4);
3261 /* We allow -M'Module qw(Foo Bar)' */
3262 while(isALNUM(*s) || *s==':') {
3271 Perl_croak(aTHX_ "Module name required with -%c option",
3274 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3275 "contains single ':'",
3276 (int)(s - start), start, option);
3277 end = s + strlen(s);
3279 sv_catpvn(sv, start, end - start);
3280 if (option == 'm') {
3282 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3283 sv_catpvs( sv, " ()");
3286 sv_catpvn(sv, start, s-start);
3287 /* Use NUL as q''-delimiter. */
3288 sv_catpvs(sv, " split(/,/,q\0");
3290 sv_catpvn(sv, s, end - s);
3291 sv_catpvs(sv, "\0)");
3294 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3297 Perl_croak(aTHX_ "Missing argument to -%c", option);
3308 forbid_setid('s', FALSE);
3309 PL_doswitches = TRUE;
3319 PL_do_undump = TRUE;
3329 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3330 PL_dowarn |= G_WARN_ON;
3335 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3336 if (!specialWARN(PL_compiling.cop_warnings))
3337 PerlMemShared_free(PL_compiling.cop_warnings);
3338 PL_compiling.cop_warnings = pWARN_ALL ;
3342 PL_dowarn = G_WARN_ALL_OFF;
3343 if (!specialWARN(PL_compiling.cop_warnings))
3344 PerlMemShared_free(PL_compiling.cop_warnings);
3345 PL_compiling.cop_warnings = pWARN_NONE ;
3352 if (s[0] == '-') /* Additional switches on #! line. */
3357 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3363 #ifdef ALTERNATE_SHEBANG
3364 case 'S': /* OS/2 needs -S on "extproc" line. */
3367 case 'e': case 'f': case 'x': case 'E':
3368 #ifndef ALTERNATE_SHEBANG
3372 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3375 "Unrecognized switch: -%.1s (-h will show valid options)",s
3385 if (!sv_derived_from(PL_patchlevel, "version"))
3386 upg_version(PL_patchlevel, TRUE);
3389 SV* level= vstringify(PL_patchlevel);
3390 #ifdef PERL_PATCHNUM
3391 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3392 SV *num = newSVpvs(PERL_PATCHNUM "*");
3394 SV *num = newSVpvs(PERL_PATCHNUM);
3397 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3398 SvREFCNT_dec(level);
3401 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3405 PerlIO_printf(PerlIO_stdout(),
3406 "\nThis is perl " STRINGIFY(PERL_REVISION)
3407 ", version " STRINGIFY(PERL_VERSION)
3408 ", subversion " STRINGIFY(PERL_SUBVERSION)
3409 " (%"SVf") built for " ARCHNAME, level
3411 SvREFCNT_dec(level);
3414 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3415 PerlIO_printf(PerlIO_stdout(),
3416 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3417 SVfARG(vstringify(PL_patchlevel))));
3418 PerlIO_printf(PerlIO_stdout(),
3419 Perl_form(aTHX_ " built under %s at %s %s\n",
3420 OSNAME, __DATE__, __TIME__));
3421 PerlIO_printf(PerlIO_stdout(),
3422 Perl_form(aTHX_ " OS Specific Release: %s\n",
3425 #if defined(LOCAL_PATCH_COUNT)
3426 if (LOCAL_PATCH_COUNT > 0)
3427 PerlIO_printf(PerlIO_stdout(),
3428 "\n(with %d registered patch%s, "
3429 "see perl -V for more detail)",
3431 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3434 PerlIO_printf(PerlIO_stdout(),
3435 "\n\nCopyright 1987-2012, Larry Wall\n");
3437 PerlIO_printf(PerlIO_stdout(),
3438 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3441 PerlIO_printf(PerlIO_stdout(),
3442 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3443 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3446 PerlIO_printf(PerlIO_stdout(),
3447 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3448 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3451 PerlIO_printf(PerlIO_stdout(),
3452 "atariST series port, ++jrb bammi@cadence.com\n");
3455 PerlIO_printf(PerlIO_stdout(),
3456 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3459 PerlIO_printf(PerlIO_stdout(),
3460 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3463 PerlIO_printf(PerlIO_stdout(),
3464 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3467 PerlIO_printf(PerlIO_stdout(),
3468 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3471 PerlIO_printf(PerlIO_stdout(),
3472 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3475 PerlIO_printf(PerlIO_stdout(),
3476 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3479 PerlIO_printf(PerlIO_stdout(),
3480 "EPOC port by Olaf Flebbe, 1999-2002\n");
3483 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3484 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3487 #ifdef __SYMBIAN32__
3488 PerlIO_printf(PerlIO_stdout(),
3489 "Symbian port by Nokia, 2004-2005\n");
3491 #ifdef BINARY_BUILD_NOTICE
3492 BINARY_BUILD_NOTICE;
3494 PerlIO_printf(PerlIO_stdout(),
3496 Perl may be copied only under the terms of either the Artistic License or the\n\
3497 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3498 Complete documentation for Perl, including FAQ lists, should be found on\n\
3499 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3500 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3504 /* compliments of Tom Christiansen */
3506 /* unexec() can be found in the Gnu emacs distribution */
3507 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3510 #include <lib$routines.h>
3514 Perl_my_unexec(pTHX)
3516 PERL_UNUSED_CONTEXT;
3518 SV * prog = newSVpv(BIN_EXP, 0);
3519 SV * file = newSVpv(PL_origfilename, 0);
3523 sv_catpvs(prog, "/perl");
3524 sv_catpvs(file, ".perldump");
3526 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3527 /* unexec prints msg to stderr in case of failure */
3528 PerlProc_exit(status);
3531 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3532 # elif defined(WIN32) || defined(__CYGWIN__)
3533 Perl_croak(aTHX_ "dump is not supported");
3535 ABORT(); /* for use with undump */
3540 /* initialize curinterp */
3546 # define PERLVAR(prefix,var,type)
3547 # define PERLVARA(prefix,var,n,type)
3548 # if defined(PERL_IMPLICIT_CONTEXT)
3549 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3550 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3552 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3553 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3555 # include "intrpvar.h"
3561 # define PERLVAR(prefix,var,type)
3562 # define PERLVARA(prefix,var,n,type)
3563 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3564 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3565 # include "intrpvar.h"
3572 /* As these are inside a structure, PERLVARI isn't capable of initialising
3574 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3575 PL_reg_poscache = PL_reg_starttry = NULL;
3579 S_init_main_stash(pTHX)
3584 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3585 /* We know that the string "main" will be in the global shared string
3586 table, so it's a small saving to use it rather than allocate another
3588 PL_curstname = newSVpvs_share("main");
3589 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3590 /* If we hadn't caused another reference to "main" to be in the shared
3591 string table above, then it would be worth reordering these two,
3592 because otherwise all we do is delete "main" from it as a consequence
3593 of the SvREFCNT_dec, only to add it again with hv_name_set */
3594 SvREFCNT_dec(GvHV(gv));
3595 hv_name_set(PL_defstash, "main", 4, 0);
3596 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3598 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3600 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3601 GvMULTI_on(PL_incgv);
3602 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3603 GvMULTI_on(PL_hintgv);
3604 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3605 SvREFCNT_inc_simple_void(PL_defgv);
3606 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3607 SvREFCNT_inc_simple_void(PL_errgv);
3608 GvMULTI_on(PL_errgv);
3609 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3610 GvMULTI_on(PL_replgv);
3611 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3612 #ifdef PERL_DONT_CREATE_GVSV
3615 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3617 SET_CURSTASH(PL_defstash);
3618 CopSTASH_set(&PL_compiling, PL_defstash);
3619 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3620 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3622 /* We must init $/ before switches are processed. */
3623 sv_setpvs(get_sv("/", GV_ADD), "\n");
3627 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3630 PerlIO *rsfp = NULL;
3633 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3636 PL_origfilename = savepvs("-e");
3639 /* if find_script() returns, it returns a malloc()-ed value */
3640 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3642 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3643 const char *s = scriptname + 8;
3649 * Tell apart "normal" usage of fdscript, e.g.
3650 * with bash on FreeBSD:
3651 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3652 * from usage in suidperl.
3653 * Does any "normal" usage leave garbage after the number???
3654 * Is it a mistake to use a similar /dev/fd/ construct for
3659 * Be supersafe and do some sanity-checks.
3660 * Still, can we be sure we got the right thing?
3663 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3666 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3668 scriptname = savepv(s + 1);
3669 Safefree(PL_origfilename);
3670 PL_origfilename = (char *)scriptname;
3675 CopFILE_free(PL_curcop);
3676 CopFILE_set(PL_curcop, PL_origfilename);
3677 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3678 scriptname = (char *)"";
3679 if (fdscript >= 0) {
3680 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3682 else if (!*scriptname) {
3683 forbid_setid(0, *suidscript);
3687 #ifdef FAKE_BIT_BUCKET
3688 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3689 * is called) and still have the "-e" work. (Believe it or not,
3690 * a /dev/null is required for the "-e" to work because source
3691 * filter magic is used to implement it. ) This is *not* a general
3692 * replacement for a /dev/null. What we do here is create a temp
3693 * file (an empty file), open up that as the script, and then
3694 * immediately close and unlink it. Close enough for jazz. */
3695 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3696 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3697 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3698 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3699 FAKE_BIT_BUCKET_TEMPLATE
3701 const char * const err = "Failed to create a fake bit bucket";
3702 if (strEQ(scriptname, BIT_BUCKET)) {
3703 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3704 int tmpfd = mkstemp(tmpname);
3706 scriptname = tmpname;
3709 Perl_croak(aTHX_ err);
3712 scriptname = mktemp(tmpname);
3714 Perl_croak(aTHX_ err);
3719 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3720 #ifdef FAKE_BIT_BUCKET
3721 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3722 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3723 && strlen(scriptname) == sizeof(tmpname) - 1) {
3726 scriptname = BIT_BUCKET;
3730 /* PSz 16 Sep 03 Keep neat error message */
3732 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3734 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3735 CopFILE(PL_curcop), Strerror(errno));
3737 #if defined(HAS_FCNTL) && defined(F_SETFD)
3738 /* ensure close-on-exec */
3739 fcntl(PerlIO_fileno(rsfp), F_SETFD, 1);
3745 * I_SYSSTATVFS HAS_FSTATVFS
3747 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3748 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3749 * here so that metaconfig picks them up. */
3752 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3753 /* Don't even need this function. */
3756 S_validate_suid(pTHX_ PerlIO *rsfp)
3758 const UV my_uid = PerlProc_getuid();
3759 const UV my_euid = PerlProc_geteuid();
3760 const UV my_gid = PerlProc_getgid();
3761 const UV my_egid = PerlProc_getegid();
3763 PERL_ARGS_ASSERT_VALIDATE_SUID;
3765 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3768 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3769 if ((my_euid != my_uid && my_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3771 (my_egid != my_gid && my_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3774 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3775 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3776 /* not set-id, must be wrapped */
3779 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3782 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3786 register const char *s2;
3788 PERL_ARGS_ASSERT_FIND_BEGINNING;
3790 /* skip forward in input to the real script? */
3793 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3794 Perl_croak(aTHX_ "No Perl script found in input\n");
3796 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3797 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3798 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3800 while (*s == ' ' || *s == '\t') s++;
3802 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3803 || s2[-1] == '_') s2--;
3804 if (strnEQ(s2-4,"perl",4))
3805 while ((s = moreswitches(s)))
3815 const UV my_uid = PerlProc_getuid();
3816 const UV my_euid = PerlProc_geteuid();
3817 const UV my_gid = PerlProc_getgid();
3818 const UV my_egid = PerlProc_getegid();
3820 /* Should not happen: */
3821 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3822 PL_tainting |= (my_uid && (my_euid != my_uid || my_egid != my_gid));
3825 * Should go by suidscript, not uid!=euid: why disallow
3826 * system("ls") in scripts run from setuid things?
3827 * Or, is this run before we check arguments and set suidscript?
3828 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3829 * (We never have suidscript, can we be sure to have fdscript?)
3830 * Or must then go by UID checks? See comments in forbid_setid also.
3834 /* This is used very early in the lifetime of the program,
3835 * before even the options are parsed, so PL_tainting has
3836 * not been initialized properly. */
3838 Perl_doing_taint(int argc, char *argv[], char *envp[])
3840 #ifndef PERL_IMPLICIT_SYS
3841 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3842 * before we have an interpreter-- and the whole point of this
3843 * function is to be called at such an early stage. If you are on
3844 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3845 * "tainted because running with altered effective ids', you'll
3846 * have to add your own checks somewhere in here. The two most
3847 * known samples of 'implicitness' are Win32 and NetWare, neither
3848 * of which has much of concept of 'uids'. */
3849 int uid = PerlProc_getuid();
3850 int euid = PerlProc_geteuid();
3851 int gid = PerlProc_getgid();
3852 int egid = PerlProc_getegid();
3859 if (uid && (euid != uid || egid != gid))
3861 #endif /* !PERL_IMPLICIT_SYS */
3862 /* This is a really primitive check; environment gets ignored only
3863 * if -T are the first chars together; otherwise one gets
3864 * "Too late" message. */
3865 if ( argc > 1 && argv[1][0] == '-'
3866 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3871 /* Passing the flag as a single char rather than a string is a slight space
3872 optimisation. The only message that isn't /^-.$/ is
3873 "program input from stdin", which is substituted in place of '\0', which
3874 could never be a command line flag. */
3876 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3879 char string[3] = "-x";
3880 const char *message = "program input from stdin";
3887 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3888 if (PerlProc_getuid() != PerlProc_geteuid())
3889 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3890 if (PerlProc_getgid() != PerlProc_getegid())
3891 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3892 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3894 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3898 Perl_init_dbargs(pTHX)
3900 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3905 /* Someone has already created it.
3906 It might have entries, and if we just turn off AvREAL(), they will
3907 "leak" until global destruction. */
3909 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3910 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3912 AvREIFY_only(PL_dbargs);
3916 Perl_init_debugger(pTHX)
3919 HV * const ostash = PL_curstash;
3921 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3923 Perl_init_dbargs(aTHX);
3924 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3925 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3926 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3927 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3928 if (!SvIOK(PL_DBsingle))
3929 sv_setiv(PL_DBsingle, 0);
3930 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3931 if (!SvIOK(PL_DBtrace))
3932 sv_setiv(PL_DBtrace, 0);
3933 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3934 if (!SvIOK(PL_DBsignal))
3935 sv_setiv(PL_DBsignal, 0);
3936 SvREFCNT_dec(PL_curstash);
3937 PL_curstash = ostash;
3940 #ifndef STRESS_REALLOC
3941 #define REASONABLE(size) (size)
3943 #define REASONABLE(size) (1) /* unreasonable */
3947 Perl_init_stacks(pTHX)
3950 /* start with 128-item stack and 8K cxstack */
3951 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3952 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3953 PL_curstackinfo->si_type = PERLSI_MAIN;
3954 PL_curstack = PL_curstackinfo->si_stack;
3955 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3957 PL_stack_base = AvARRAY(PL_curstack);
3958 PL_stack_sp = PL_stack_base;
3959 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3961 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3964 PL_tmps_max = REASONABLE(128);
3966 Newx(PL_markstack,REASONABLE(32),I32);
3967 PL_markstack_ptr = PL_markstack;
3968 PL_markstack_max = PL_markstack + REASONABLE(32);
3972 Newx(PL_scopestack,REASONABLE(32),I32);
3974 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3976 PL_scopestack_ix = 0;
3977 PL_scopestack_max = REASONABLE(32);
3979 Newx(PL_savestack,REASONABLE(128),ANY);
3980 PL_savestack_ix = 0;
3981 PL_savestack_max = REASONABLE(128);
3990 while (PL_curstackinfo->si_next)
3991 PL_curstackinfo = PL_curstackinfo->si_next;
3992 while (PL_curstackinfo) {
3993 PERL_SI *p = PL_curstackinfo->si_prev;
3994 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3995 Safefree(PL_curstackinfo->si_cxstack);
3996 Safefree(PL_curstackinfo);
3997 PL_curstackinfo = p;
3999 Safefree(PL_tmps_stack);
4000 Safefree(PL_markstack);
4001 Safefree(PL_scopestack);
4003 Safefree(PL_scopestack_name);
4005 Safefree(PL_savestack);
4009 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4011 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4012 AV *const isa = GvAVn(gv);
4015 PERL_ARGS_ASSERT_POPULATE_ISA;
4017 if(AvFILLp(isa) != -1)
4020 /* NOTE: No support for tied ISA */
4022 va_start(args, len);
4024 const char *const parent = va_arg(args, const char*);
4029 parent_len = va_arg(args, size_t);
4031 /* Arguments are supplied with a trailing :: */
4032 assert(parent_len > 2);
4033 assert(parent[parent_len - 1] == ':');
4034 assert(parent[parent_len - 2] == ':');
4035 av_push(isa, newSVpvn(parent, parent_len - 2));
4036 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4043 S_init_predump_symbols(pTHX)
4049 sv_setpvs(get_sv("\"", GV_ADD), " ");
4050 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4053 /* Historically, PVIOs were blessed into IO::Handle, unless
4054 FileHandle was loaded, in which case they were blessed into
4055 that. Action at a distance.
4056 However, if we simply bless into IO::Handle, we break code
4057 that assumes that PVIOs will have (among others) a seek
4058 method. IO::File inherits from IO::Handle and IO::Seekable,
4059 and provides the needed methods. But if we simply bless into
4060 it, then we break code that assumed that by loading
4061 IO::Handle, *it* would work.
4062 So a compromise is to set up the correct @IO::File::ISA,
4063 so that code that does C<use IO::Handle>; will still work.
4066 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4067 STR_WITH_LEN("IO::Handle::"),
4068 STR_WITH_LEN("IO::Seekable::"),
4069 STR_WITH_LEN("Exporter::"),
4072 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4073 GvMULTI_on(PL_stdingv);
4074 io = GvIOp(PL_stdingv);
4075 IoTYPE(io) = IoTYPE_RDONLY;
4076 IoIFP(io) = PerlIO_stdin();
4077 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4079 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4081 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4084 IoTYPE(io) = IoTYPE_WRONLY;
4085 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4087 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4089 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4091 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4092 GvMULTI_on(PL_stderrgv);
4093 io = GvIOp(PL_stderrgv);
4094 IoTYPE(io) = IoTYPE_WRONLY;
4095 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4096 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4098 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4100 PL_statname = newSVpvs(""); /* last filename we did stat on */
4104 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4108 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4110 argc--,argv++; /* skip name of script */
4111 if (PL_doswitches) {
4112 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4116 if (argv[0][1] == '-' && !argv[0][2]) {
4120 if ((s = strchr(argv[0], '='))) {
4121 const char *const start_name = argv[0] + 1;
4122 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4123 TRUE, SVt_PV)), s + 1);
4126 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4129 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4130 GvMULTI_on(PL_argvgv);
4131 (void)gv_AVadd(PL_argvgv);
4132 av_clear(GvAVn(PL_argvgv));
4133 for (; argc > 0; argc--,argv++) {
4134 SV * const sv = newSVpv(argv[0],0);
4135 av_push(GvAVn(PL_argvgv),sv);
4136 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4137 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4140 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4141 (void)sv_utf8_decode(sv);
4147 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4152 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4154 PL_toptarget = newSV_type(SVt_PVFM);
4155 sv_setpvs(PL_toptarget, "");
4156 PL_bodytarget = newSV_type(SVt_PVFM);
4157 sv_setpvs(PL_bodytarget, "");
4158 PL_formtarget = PL_bodytarget;
4162 init_argv_symbols(argc,argv);
4164 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4165 sv_setpv(GvSV(tmpgv),PL_origfilename);
4167 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4169 bool env_is_not_environ;
4170 GvMULTI_on(PL_envgv);
4171 hv = GvHVn(PL_envgv);
4172 hv_magic(hv, NULL, PERL_MAGIC_env);
4174 #ifdef USE_ENVIRON_ARRAY
4175 /* Note that if the supplied env parameter is actually a copy
4176 of the global environ then it may now point to free'd memory
4177 if the environment has been modified since. To avoid this
4178 problem we treat env==NULL as meaning 'use the default'
4182 env_is_not_environ = env != environ;
4183 if (env_is_not_environ
4184 # ifdef USE_ITHREADS
4185 && PL_curinterp == aTHX
4194 for (; *env; env++) {
4197 if (!(s = strchr(old_var,'=')) || s == old_var)
4200 #if defined(MSDOS) && !defined(DJGPP)
4202 (void)strupr(old_var);
4205 sv = newSVpv(s+1, 0);
4206 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4207 if (env_is_not_environ)
4211 #endif /* USE_ENVIRON_ARRAY */
4212 #endif /* !PERL_MICRO */
4216 /* touch @F array to prevent spurious warnings 20020415 MJD */
4218 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4223 S_init_perllib(pTHX)
4227 const char *perl5lib = NULL;
4230 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4236 perl5lib = PerlEnv_getenv("PERL5LIB");
4238 * It isn't possible to delete an environment variable with
4239 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4240 * case we treat PERL5LIB as undefined if it has a zero-length value.
4242 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4243 if (perl5lib && *perl5lib != '\0')
4247 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4249 s = PerlEnv_getenv("PERLLIB");
4251 incpush_use_sep(s, 0, 0);
4254 /* Treat PERL5?LIB as a possible search list logical name -- the
4255 * "natural" VMS idiom for a Unix path string. We allow each
4256 * element to be a set of |-separated directories for compatibility.
4260 if (my_trnlnm("PERL5LIB",buf,0))
4262 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4263 } while (my_trnlnm("PERL5LIB",buf,++idx));
4265 while (my_trnlnm("PERLLIB",buf,idx++))
4266 incpush_use_sep(buf, 0, 0);
4271 #ifndef PERL_IS_MINIPERL
4272 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4273 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4275 /* Use the ~-expanded versions of APPLLIB (undocumented),
4276 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4279 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4280 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4284 /* sitearch is always relative to sitelib on Windows for
4285 * DLL-based path intuition to work correctly */
4286 # if !defined(WIN32)
4287 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4288 INCPUSH_CAN_RELOCATE);
4294 /* this picks up sitearch as well */
4295 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4297 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4299 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4303 #ifdef PERL_VENDORARCH_EXP
4304 /* vendorarch is always relative to vendorlib on Windows for
4305 * DLL-based path intuition to work correctly */
4306 # if !defined(WIN32)
4307 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4308 INCPUSH_CAN_RELOCATE);
4312 #ifdef PERL_VENDORLIB_EXP
4314 /* this picks up vendorarch as well */
4315 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4317 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4319 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4320 INCPUSH_CAN_RELOCATE);
4325 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4329 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4333 s = win32_get_privlib(PERL_FS_VERSION, &len);
4335 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4338 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4340 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4344 #ifdef PERL_OTHERLIBDIRS
4345 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4346 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4347 |INCPUSH_CAN_RELOCATE);
4353 * It isn't possible to delete an environment variable with
4354 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4355 * case we treat PERL5LIB as undefined if it has a zero-length value.
4357 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4358 if (perl5lib && *perl5lib != '\0')
4362 incpush_use_sep(perl5lib, 0,
4363 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4365 /* Treat PERL5?LIB as a possible search list logical name -- the
4366 * "natural" VMS idiom for a Unix path string. We allow each
4367 * element to be a set of |-separated directories for compatibility.
4371 if (my_trnlnm("PERL5LIB",buf,0))
4373 incpush_use_sep(buf, 0,
4374 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4375 } while (my_trnlnm("PERL5LIB",buf,++idx));
4379 /* Use the ~-expanded versions of APPLLIB (undocumented),
4380 SITELIB and VENDORLIB for older versions
4383 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4384 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4387 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4388 /* Search for version-specific dirs below here */
4389 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4390 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4394 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4395 /* Search for version-specific dirs below here */
4396 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4397 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4400 #ifdef PERL_OTHERLIBDIRS
4401 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4402 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4403 |INCPUSH_CAN_RELOCATE);
4405 #endif /* !PERL_IS_MINIPERL */
4408 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4411 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4412 # define PERLLIB_SEP ';'
4415 # define PERLLIB_SEP '|'
4417 # define PERLLIB_SEP ':'
4420 #ifndef PERLLIB_MANGLE
4421 # define PERLLIB_MANGLE(s,n) (s)
4424 #ifndef PERL_IS_MINIPERL
4425 /* Push a directory onto @INC if it exists.
4426 Generate a new SV if we do this, to save needing to copy the SV we push
4429 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4434 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4436 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4437 S_ISDIR(tmpstatbuf.st_mode)) {
4439 dir = newSVsv(stem);
4441 /* Truncate dir back to stem. */
4442 SvCUR_set(dir, SvCUR(stem));
4449 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4451 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4454 PERL_ARGS_ASSERT_MAYBERELOCATE;
4458 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4459 defined to so something (in os2/os2.c), but the code has been
4460 this way, ignoring any possible changed of length, since
4461 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4463 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4465 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4472 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4474 while (unix[len-1] == '/') len--; /* Cosmetic */
4475 sv_usepvn(libdir,unix,len);
4478 PerlIO_printf(Perl_error_log,
4479 "Failed to unixify @INC element \"%s\"\n",
4480 SvPV_nolen_const(libdir));
4484 /* Do the if() outside the #ifdef to avoid warnings about an unused
4487 #ifdef PERL_RELOCATABLE_INC
4489 * Relocatable include entries are marked with a leading .../
4492 * 0: Remove that leading ".../"
4493 * 1: Remove trailing executable name (anything after the last '/')
4494 * from the perl path to give a perl prefix
4496 * While the @INC element starts "../" and the prefix ends with a real
4497 * directory (ie not . or ..) chop that real directory off the prefix
4498 * and the leading "../" from the @INC element. ie a logical "../"
4500 * Finally concatenate the prefix and the remainder of the @INC element
4501 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4502 * generates /usr/local/lib/perl5
4504 const char *libpath = SvPVX(libdir);
4505 STRLEN libpath_len = SvCUR(libdir);
4506 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4508 SV * const caret_X = get_sv("\030", 0);
4509 /* Going to use the SV just as a scratch buffer holding a C
4515 /* $^X is *the* source of taint if tainting is on, hence
4516 SvPOK() won't be true. */
4518 assert(SvPOKp(caret_X));
4519 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4521 /* Firstly take off the leading .../
4522 If all else fail we'll do the paths relative to the current
4524 sv_chop(libdir, libpath + 4);
4525 /* Don't use SvPV as we're intentionally bypassing taining,
4526 mortal copies that the mg_get of tainting creates, and
4527 corruption that seems to come via the save stack.
4528 I guess that the save stack isn't correctly set up yet. */
4529 libpath = SvPVX(libdir);
4530 libpath_len = SvCUR(libdir);
4532 /* This would work more efficiently with memrchr, but as it's
4533 only a GNU extension we'd need to probe for it and
4534 implement our own. Not hard, but maybe not worth it? */
4536 prefix = SvPVX(prefix_sv);
4537 lastslash = strrchr(prefix, '/');
4539 /* First time in with the *lastslash = '\0' we just wipe off
4540 the trailing /perl from (say) /usr/foo/bin/perl
4544 while ((*lastslash = '\0'), /* Do that, come what may. */
4545 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4546 && (lastslash = strrchr(prefix, '/')))) {
4547 if (lastslash[1] == '\0'
4548 || (lastslash[1] == '.'
4549 && (lastslash[2] == '/' /* ends "/." */
4550 || (lastslash[2] == '/'
4551 && lastslash[3] == '/' /* or "/.." */
4553 /* Prefix ends "/" or "/." or "/..", any of which
4554 are fishy, so don't do any more logical cleanup.
4558 /* Remove leading "../" from path */
4561 /* Next iteration round the loop removes the last
4562 directory name from prefix by writing a '\0' in
4563 the while clause. */
4565 /* prefix has been terminated with a '\0' to the correct
4566 length. libpath points somewhere into the libdir SV.
4567 We need to join the 2 with '/' and drop the result into
4569 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4570 SvREFCNT_dec(libdir);
4571 /* And this is the new libdir. */
4574 (PerlProc_getuid() != PerlProc_geteuid() ||
4575 PerlProc_getgid() != PerlProc_getegid())) {
4576 /* Need to taint relocated paths if running set ID */
4577 SvTAINTED_on(libdir);
4580 SvREFCNT_dec(prefix_sv);
4588 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4591 #ifndef PERL_IS_MINIPERL
4592 const U8 using_sub_dirs
4593 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4594 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4595 const U8 add_versioned_sub_dirs
4596 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4597 const U8 add_archonly_sub_dirs
4598 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4599 #ifdef PERL_INC_VERSION_LIST
4600 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4603 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4604 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4605 AV *const inc = GvAVn(PL_incgv);
4607 PERL_ARGS_ASSERT_INCPUSH;
4610 /* Could remove this vestigial extra block, if we don't mind a lot of
4611 re-indenting diff noise. */
4613 SV *const libdir = mayberelocate(dir, len, flags);
4614 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4615 arranged to unshift #! line -I onto the front of @INC. However,
4616 -I can add version and architecture specific libraries, and they
4617 need to go first. The old code assumed that it was always
4618 pushing. Hence to make it work, need to push the architecture
4619 (etc) libraries onto a temporary array, then "unshift" that onto
4620 the front of @INC. */
4621 #ifndef PERL_IS_MINIPERL
4622 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4625 * BEFORE pushing libdir onto @INC we may first push version- and
4626 * archname-specific sub-directories.
4628 if (using_sub_dirs) {
4629 SV *subdir = newSVsv(libdir);
4630 #ifdef PERL_INC_VERSION_LIST
4631 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4632 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4633 const char * const *incver;
4636 if (add_versioned_sub_dirs) {
4637 /* .../version/archname if -d .../version/archname */
4638 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4639 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4641 /* .../version if -d .../version */
4642 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4643 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4646 #ifdef PERL_INC_VERSION_LIST
4648 for (incver = incverlist; *incver; incver++) {
4649 /* .../xxx if -d .../xxx */
4650 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4651 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4656 if (add_archonly_sub_dirs) {
4657 /* .../archname if -d .../archname */
4658 sv_catpvs(subdir, "/" ARCHNAME);
4659 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4663 assert (SvREFCNT(subdir) == 1);
4664 SvREFCNT_dec(subdir);
4666 #endif /* !PERL_IS_MINIPERL */
4667 /* finally add this lib directory at the end of @INC */
4669 #ifdef PERL_IS_MINIPERL
4670 const U32 extra = 0;
4672 U32 extra = av_len(av) + 1;
4674 av_unshift(inc, extra + push_basedir);
4676 av_store(inc, extra, libdir);
4677 #ifndef PERL_IS_MINIPERL
4679 /* av owns a reference, av_store() expects to be donated a
4680 reference, and av expects to be sane when it's cleared.
4681 If I wanted to be naughty and wrong, I could peek inside the
4682 implementation of av_clear(), realise that it uses
4683 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4684 and so directly steal from it (with a memcpy() to inc, and
4685 then memset() to NULL them out. But people copy code from the
4686 core expecting it to be best practise, so let's use the API.
4687 Although studious readers will note that I'm not checking any
4689 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4694 else if (push_basedir) {
4695 av_push(inc, libdir);
4698 if (!push_basedir) {
4699 assert (SvREFCNT(libdir) == 1);
4700 SvREFCNT_dec(libdir);
4706 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4710 /* This logic has been broken out from S_incpush(). It may be possible to
4713 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4715 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4716 * argument to incpush_use_sep. This allows creation of relocatable
4717 * Perl distributions that patch the binary at install time. Those
4718 * distributions will have to provide their own relocation tools; this
4719 * is not a feature otherwise supported by core Perl.
4721 #ifndef PERL_RELOCATABLE_INCPUSH
4728 /* Break at all separators */
4729 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4731 /* skip any consecutive separators */
4733 /* Uncomment the next line for PATH semantics */
4734 /* But you'll need to write tests */
4735 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4737 incpush(p, (STRLEN)(s - p), flags);
4742 incpush(p, (STRLEN)(end - p), flags);
4747 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4751 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4757 PERL_ARGS_ASSERT_CALL_LIST;
4759 while (av_len(paramList) >= 0) {
4760 cv = MUTABLE_CV(av_shift(paramList));
4762 if (paramList == PL_beginav) {
4763 /* save PL_beginav for compiler */
4764 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4766 else if (paramList == PL_checkav) {
4767 /* save PL_checkav for compiler */
4768 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4770 else if (paramList == PL_unitcheckav) {
4771 /* save PL_unitcheckav for compiler */
4772 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4783 PL_madskills |= 16384;
4788 PL_madskills &= ~16384;
4791 (void)SvPV_const(atsv, len);
4793 PL_curcop = &PL_compiling;
4794 CopLINE_set(PL_curcop, oldline);
4795 if (paramList == PL_beginav)
4796 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4798 Perl_sv_catpvf(aTHX_ atsv,
4799 "%s failed--call queue aborted",
4800 paramList == PL_checkav ? "CHECK"
4801 : paramList == PL_initav ? "INIT"
4802 : paramList == PL_unitcheckav ? "UNITCHECK"
4804 while (PL_scopestack_ix > oldscope)
4807 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4814 /* my_exit() was called */
4815 while (PL_scopestack_ix > oldscope)
4818 SET_CURSTASH(PL_defstash);
4819 PL_curcop = &PL_compiling;
4820 CopLINE_set(PL_curcop, oldline);
4826 PL_curcop = &PL_compiling;
4827 CopLINE_set(PL_curcop, oldline);
4830 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4839 Perl_my_exit(pTHX_ U32 status)
4850 STATUS_EXIT_SET(status);
4857 Perl_my_failure_exit(pTHX)
4861 /* We have been called to fall on our sword. The desired exit code
4862 * should be already set in STATUS_UNIX, but could be shifted over
4863 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4866 * If an error code has not been set, then force the issue.
4868 if (MY_POSIX_EXIT) {
4870 /* According to the die_exit.t tests, if errno is non-zero */
4871 /* It should be used for the error status. */
4873 if (errno == EVMSERR) {
4874 STATUS_NATIVE = vaxc$errno;
4877 /* According to die_exit.t tests, if the child_exit code is */
4878 /* also zero, then we need to exit with a code of 255 */
4879 if ((errno != 0) && (errno < 256))
4880 STATUS_UNIX_EXIT_SET(errno);
4881 else if (STATUS_UNIX < 255) {
4882 STATUS_UNIX_EXIT_SET(255);
4887 /* The exit code could have been set by $? or vmsish which
4888 * means that it may not have fatal set. So convert
4889 * success/warning codes to fatal with out changing
4890 * the POSIX status code. The severity makes VMS native
4891 * status handling work, while UNIX mode programs use the
4892 * the POSIX exit codes.
4894 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4895 STATUS_NATIVE &= STS$M_COND_ID;
4896 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4900 /* Traditionally Perl on VMS always expects a Fatal Error. */
4901 if (vaxc$errno & 1) {
4903 /* So force success status to failure */
4904 if (STATUS_NATIVE & 1)
4909 STATUS_UNIX = EINTR; /* In case something cares */
4914 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4916 /* Encode the severity code */
4917 severity = STATUS_NATIVE & STS$M_SEVERITY;
4918 STATUS_UNIX = (severity ? severity : 1) << 8;
4920 /* Perl expects this to be a fatal error */
4921 if (severity != STS$K_SEVERE)
4930 STATUS_UNIX_SET(errno);
4932 exitstatus = STATUS_UNIX >> 8;
4933 if (exitstatus & 255)
4934 STATUS_UNIX_SET(exitstatus);
4936 STATUS_UNIX_SET(255);
4943 S_my_exit_jump(pTHX)
4948 SvREFCNT_dec(PL_e_script);
4952 POPSTACK_TO(PL_mainstack);
4960 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4963 const char * const p = SvPVX_const(PL_e_script);
4964 const char *nl = strchr(p, '\n');
4966 PERL_UNUSED_ARG(idx);
4967 PERL_UNUSED_ARG(maxlen);
4969 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4971 filter_del(read_e_script);
4974 sv_catpvn(buf_sv, p, nl-p);
4975 sv_chop(PL_e_script, nl);
4981 * c-indentation-style: bsd
4983 * indent-tabs-mode: nil
4986 * ex: set ts=8 sts=4 sw=4 et: