1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
33 #include <sys/types.h>
37 #include "gdb_string.h"
38 #include "event-loop.h"
44 /* If nonzero, display time usage both at startup and for each command. */
48 /* If nonzero, display space usage both at startup and for each command. */
52 /* The selected interpreter. This will be used as a set command
53 variable, so it should always be malloc'ed - since
54 do_setshow_command will free it. */
57 /* Whether xdb commands will be handled */
60 /* Whether dbx commands will be handled */
63 /* System root path, used to find libraries etc. */
64 char *gdb_sysroot
= 0;
66 struct ui_file
*gdb_stdout
;
67 struct ui_file
*gdb_stderr
;
68 struct ui_file
*gdb_stdlog
;
69 struct ui_file
*gdb_stdin
;
70 /* target IO streams */
71 struct ui_file
*gdb_stdtargin
;
72 struct ui_file
*gdb_stdtarg
;
73 struct ui_file
*gdb_stdtargerr
;
75 /* Whether to enable writing into executable and core files */
76 extern int write_files
;
78 static void print_gdb_help (struct ui_file
*);
80 /* These two are used to set the external editor commands when gdb is farming
81 out files to be edited by another program. */
83 extern char *external_editor_command
;
85 /* Call command_loop. If it happens to return, pass that through as a
86 non-zero return status. */
89 captured_command_loop (void *data
)
91 current_interp_command_loop ();
92 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
93 would clean things up (restoring the cleanup chain) to the state
94 they were just prior to the call. Technically, this means that
95 the do_cleanups() below is redundant. Unfortunately, many FUNCs
96 are not that well behaved. do_cleanups should either be replaced
97 with a do_cleanups call (to cover the problem) or an assertion
98 check to detect bad FUNCs code. */
99 do_cleanups (ALL_CLEANUPS
);
100 /* If the command_loop returned, normally (rather than threw an
101 error) we try to quit. If the quit is aborted, catch_errors()
102 which called this catch the signal and restart the command
104 quit_command (NULL
, instream
== stdin
);
109 captured_main (void *data
)
111 struct captured_main_args
*context
= data
;
112 int argc
= context
->argc
;
113 char **argv
= context
->argv
;
115 static int quiet
= 0;
116 static int batch
= 0;
117 static int set_args
= 0;
119 /* Pointers to various arguments from command line. */
121 char *execarg
= NULL
;
122 char *corearg
= NULL
;
126 /* These are static so that we can take their address in an initializer. */
127 static int print_help
;
128 static int print_version
;
130 /* Pointers to all arguments of --command option. */
132 /* Allocated size of cmdarg. */
134 /* Number of elements of cmdarg used. */
137 /* Indices of all arguments of --directory option. */
139 /* Allocated size. */
141 /* Number of elements used. */
144 struct stat homebuf
, cwdbuf
;
145 char *homedir
, *homeinit
;
149 long time_at_startup
= get_run_time ();
151 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
152 setlocale (LC_MESSAGES
, "");
154 #if defined (HAVE_SETLOCALE)
155 setlocale (LC_CTYPE
, "");
157 bindtextdomain (PACKAGE
, LOCALEDIR
);
158 textdomain (PACKAGE
);
161 lim_at_start
= (char *) sbrk (0);
164 #if defined (ALIGN_STACK_ON_STARTUP)
165 i
= (int) &count
& 0x3;
171 cmdarg
= (char **) xmalloc (cmdsize
* sizeof (*cmdarg
));
174 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
178 line
= (char *) xmalloc (linesize
);
179 line
[0] = '\0'; /* Terminate saved (now empty) cmd line */
182 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
183 current_directory
= gdb_dirbuf
;
185 gdb_stdout
= stdio_fileopen (stdout
);
186 gdb_stderr
= stdio_fileopen (stderr
);
187 gdb_stdlog
= gdb_stderr
; /* for moment */
188 gdb_stdtarg
= gdb_stderr
; /* for moment */
189 gdb_stdin
= stdio_fileopen (stdin
);
190 gdb_stdtargerr
= gdb_stderr
; /* for moment */
191 gdb_stdtargin
= gdb_stdin
; /* for moment */
193 /* initialize error() */
196 /* Set the sysroot path. */
197 #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
198 gdb_sysroot
= make_relative_prefix (argv
[0], BINDIR
, TARGET_SYSTEM_ROOT
);
204 if (stat (gdb_sysroot
, &s
) == 0)
205 if (S_ISDIR (s
.st_mode
))
211 gdb_sysroot
= TARGET_SYSTEM_ROOT
;
215 gdb_sysroot
= TARGET_SYSTEM_ROOT
;
217 #if defined (TARGET_SYSTEM_ROOT)
218 gdb_sysroot
= TARGET_SYSTEM_ROOT
;
224 /* There will always be an interpreter. Either the one passed into
225 this captured main, or one specified by the user at start up, or
226 the console. Initialize the interpreter to the one requested by
228 interpreter_p
= xstrdup (context
->interpreter_p
);
230 /* Parse arguments and options. */
233 /* When var field is 0, use flag field to record the equivalent
234 short option (or arbitrary numbers starting at 10 for those
235 with no equivalent). */
245 static struct option long_options
[] =
248 {"tui", no_argument
, 0, OPT_TUI
},
250 {"xdb", no_argument
, &xdb_commands
, 1},
251 {"dbx", no_argument
, &dbx_commands
, 1},
252 {"readnow", no_argument
, &readnow_symbol_files
, 1},
253 {"r", no_argument
, &readnow_symbol_files
, 1},
254 {"quiet", no_argument
, &quiet
, 1},
255 {"q", no_argument
, &quiet
, 1},
256 {"silent", no_argument
, &quiet
, 1},
257 {"nx", no_argument
, &inhibit_gdbinit
, 1},
258 {"n", no_argument
, &inhibit_gdbinit
, 1},
259 {"batch", no_argument
, &batch
, 1},
260 {"epoch", no_argument
, &epoch_interface
, 1},
262 /* This is a synonym for "--annotate=1". --annotate is now preferred,
263 but keep this here for a long time because people will be running
264 emacses which use --fullname. */
265 {"fullname", no_argument
, 0, 'f'},
266 {"f", no_argument
, 0, 'f'},
268 {"annotate", required_argument
, 0, OPT_ANNOTATE
},
269 {"help", no_argument
, &print_help
, 1},
270 {"se", required_argument
, 0, OPT_SE
},
271 {"symbols", required_argument
, 0, 's'},
272 {"s", required_argument
, 0, 's'},
273 {"exec", required_argument
, 0, 'e'},
274 {"e", required_argument
, 0, 'e'},
275 {"core", required_argument
, 0, 'c'},
276 {"c", required_argument
, 0, 'c'},
277 {"pid", required_argument
, 0, 'p'},
278 {"p", required_argument
, 0, 'p'},
279 {"command", required_argument
, 0, 'x'},
280 {"version", no_argument
, &print_version
, 1},
281 {"x", required_argument
, 0, 'x'},
283 {"tclcommand", required_argument
, 0, 'z'},
284 {"enable-external-editor", no_argument
, 0, 'y'},
285 {"editor-command", required_argument
, 0, 'w'},
287 {"ui", required_argument
, 0, 'i'},
288 {"interpreter", required_argument
, 0, 'i'},
289 {"i", required_argument
, 0, 'i'},
290 {"directory", required_argument
, 0, 'd'},
291 {"d", required_argument
, 0, 'd'},
292 {"cd", required_argument
, 0, OPT_CD
},
293 {"tty", required_argument
, 0, 't'},
294 {"baud", required_argument
, 0, 'b'},
295 {"b", required_argument
, 0, 'b'},
296 {"nw", no_argument
, NULL
, OPT_NOWINDOWS
},
297 {"nowindows", no_argument
, NULL
, OPT_NOWINDOWS
},
298 {"w", no_argument
, NULL
, OPT_WINDOWS
},
299 {"windows", no_argument
, NULL
, OPT_WINDOWS
},
300 {"statistics", no_argument
, 0, OPT_STATISTICS
},
301 {"write", no_argument
, &write_files
, 1},
302 {"args", no_argument
, &set_args
, 1},
303 {"l", required_argument
, 0, 'l'},
304 {0, no_argument
, 0, 0}
311 c
= getopt_long_only (argc
, argv
, "",
312 long_options
, &option_index
);
313 if (c
== EOF
|| set_args
)
316 /* Long option that takes an argument. */
317 if (c
== 0 && long_options
[option_index
].flag
== 0)
318 c
= long_options
[option_index
].val
;
323 /* Long option that just sets a flag. */
333 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
334 annotation_level
= atoi (optarg
);
337 /* Enable the display of both time and space usage. */
342 /* --tui is equivalent to -i=tui. */
343 xfree (interpreter_p
);
344 interpreter_p
= xstrdup ("tui");
347 /* FIXME: cagney/2003-03-01: Not sure if this option is
348 actually useful, and if it is, what it should do. */
352 /* -nw is equivalent to -i=console. */
353 xfree (interpreter_p
);
354 interpreter_p
= xstrdup (INTERP_CONSOLE
);
358 annotation_level
= 1;
359 /* We have probably been invoked from emacs. Disable window interface. */
372 /* "corearg" is shared by "--core" and "--pid" */
376 cmdarg
[ncmd
++] = optarg
;
380 cmdarg
= (char **) xrealloc ((char *) cmdarg
,
381 cmdsize
* sizeof (*cmdarg
));
387 extern int gdbtk_test (char *);
388 if (!gdbtk_test (optarg
))
390 fprintf_unfiltered (gdb_stderr
, _("%s: unable to load tclcommand file \"%s\""),
397 /* Backwards compatibility only. */
401 external_editor_command
= xstrdup (optarg
);
406 xfree (interpreter_p
);
407 interpreter_p
= xstrdup (optarg
);
410 dirarg
[ndir
++] = optarg
;
414 dirarg
= (char **) xrealloc ((char *) dirarg
,
415 dirsize
* sizeof (*dirarg
));
429 i
= strtol (optarg
, &p
, 0);
430 if (i
== 0 && p
== optarg
)
432 /* Don't use *_filtered or warning() (which relies on
433 current_target) until after initialize_all_files(). */
437 _("warning: could not set baud rate to `%s'.\n"), optarg
);
447 i
= strtol (optarg
, &p
, 0);
448 if (i
== 0 && p
== optarg
)
450 /* Don't use *_filtered or warning() (which relies on
451 current_target) until after initialize_all_files(). */
455 _("warning: could not set timeout limit to `%s'.\n"), optarg
);
462 fprintf_unfiltered (gdb_stderr
,
463 _("Use `%s --help' for a complete list of options.\n"),
469 /* If --help or --version, disable window interface. */
470 if (print_help
|| print_version
)
477 /* The remaining options are the command-line options for the
478 inferior. The first one is the sym/exec file, and the rest
482 fprintf_unfiltered (gdb_stderr
,
483 _("%s: `--args' specified but no program specified\n"),
487 symarg
= argv
[optind
];
488 execarg
= argv
[optind
];
490 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
494 /* OK, that's all the options. The other arguments are filenames. */
496 for (; optind
< argc
; optind
++)
500 symarg
= argv
[optind
];
501 execarg
= argv
[optind
];
504 /* The documentation says this can be a "ProcID" as well.
505 We will try it as both a corefile and a pid. */
506 corearg
= argv
[optind
];
509 fprintf_unfiltered (gdb_stderr
,
510 _("Excess command line arguments ignored. (%s%s)\n"),
511 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
519 /* Initialize all files. Give the interpreter a chance to take
520 control of the console via the deprecated_init_ui_hook(). */
523 /* Do these (and anything which might call wrap_here or *_filtered)
524 after initialize_all_files() but before the interpreter has been
525 installed. Otherwize the help/version messages will be eaten by
526 the interpreter's output handler. */
530 print_gdb_version (gdb_stdout
);
532 printf_filtered ("\n");
538 print_gdb_help (gdb_stdout
);
539 fputs_unfiltered ("\n", gdb_stdout
);
543 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
544 GDB retain the old MI1 interpreter startup behavior. Output the
545 copyright message before the interpreter is installed. That way
546 it isn't encapsulated in MI output. */
547 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
549 /* Print all the junk at the top, with trailing "..." if we are about
550 to read a symbol file (possibly slowly). */
551 print_gdb_version (gdb_stdout
);
553 printf_filtered ("..");
555 gdb_flush (gdb_stdout
); /* Force to screen during slow operations */
559 /* Install the default UI. All the interpreters should have had a
560 look at things by now. Initialize the default interpreter. */
564 struct interp
*interp
= interp_lookup (interpreter_p
);
566 error ("Interpreter `%s' unrecognized", interpreter_p
);
568 if (!interp_set (interp
))
570 fprintf_unfiltered (gdb_stderr
,
571 "Interpreter `%s' failed to initialize.\n",
577 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
578 GDB retain the old MI1 interpreter startup behavior. Output the
579 copyright message after the interpreter is installed when it is
580 any sane interpreter. */
581 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
583 /* Print all the junk at the top, with trailing "..." if we are about
584 to read a symbol file (possibly slowly). */
585 print_gdb_version (gdb_stdout
);
587 printf_filtered ("..");
589 gdb_flush (gdb_stdout
); /* Force to screen during slow operations */
592 error_pre_print
= "\n\n";
593 quit_pre_print
= error_pre_print
;
595 /* We may get more than one warning, don't double space all of them... */
596 warning_pre_print
= _("\nwarning: ");
598 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
599 *before* all the command line arguments are processed; it sets
600 global parameters, which are independent of what file you are
601 debugging or what directory you are in. */
602 homedir
= getenv ("HOME");
605 homeinit
= (char *) alloca (strlen (homedir
) +
606 strlen (gdbinit
) + 10);
607 strcpy (homeinit
, homedir
);
608 strcat (homeinit
, "/");
609 strcat (homeinit
, gdbinit
);
611 if (!inhibit_gdbinit
)
613 catch_command_errors (source_command
, homeinit
, 0, RETURN_MASK_ALL
);
616 /* Do stats; no need to do them elsewhere since we'll only
617 need them if homedir is set. Make sure that they are
618 zero in case one of them fails (this guarantees that they
619 won't match if either exists). */
621 memset (&homebuf
, 0, sizeof (struct stat
));
622 memset (&cwdbuf
, 0, sizeof (struct stat
));
624 stat (homeinit
, &homebuf
);
625 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
629 /* Now perform all the actions indicated by the arguments. */
632 catch_command_errors (cd_command
, cdarg
, 0, RETURN_MASK_ALL
);
635 for (i
= 0; i
< ndir
; i
++)
636 catch_command_errors (directory_command
, dirarg
[i
], 0, RETURN_MASK_ALL
);
641 && strcmp (execarg
, symarg
) == 0)
643 /* The exec file and the symbol-file are the same. If we can't
644 open it, better only print one error message.
645 catch_command_errors returns non-zero on success! */
646 if (catch_command_errors (exec_file_attach
, execarg
, !batch
, RETURN_MASK_ALL
))
647 catch_command_errors (symbol_file_add_main
, symarg
, 0, RETURN_MASK_ALL
);
652 catch_command_errors (exec_file_attach
, execarg
, !batch
, RETURN_MASK_ALL
);
654 catch_command_errors (symbol_file_add_main
, symarg
, 0, RETURN_MASK_ALL
);
657 /* After the symbol file has been read, print a newline to get us
658 beyond the copyright line... But errors should still set off
659 the error message with a (single) blank line. */
661 printf_filtered ("\n");
662 error_pre_print
= "\n";
663 quit_pre_print
= error_pre_print
;
664 warning_pre_print
= _("\nwarning: ");
668 /* corearg may be either a corefile or a pid.
669 If its first character is a digit, try attach first
670 and then corefile. Otherwise try corefile first. */
672 if (isdigit (corearg
[0]))
674 if (catch_command_errors (attach_command
, corearg
,
675 !batch
, RETURN_MASK_ALL
) == 0)
676 catch_command_errors (core_file_command
, corearg
,
677 !batch
, RETURN_MASK_ALL
);
679 else /* Can't be a pid, better be a corefile. */
680 catch_command_errors (core_file_command
, corearg
,
681 !batch
, RETURN_MASK_ALL
);
685 catch_command_errors (tty_command
, ttyarg
, !batch
, RETURN_MASK_ALL
);
687 /* Error messages should no longer be distinguished with extra output. */
688 error_pre_print
= NULL
;
689 quit_pre_print
= NULL
;
690 warning_pre_print
= _("warning: ");
692 /* Read the .gdbinit file in the current directory, *if* it isn't
693 the same as the $HOME/.gdbinit file (it should exist, also). */
696 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
, sizeof (struct stat
)))
697 if (!inhibit_gdbinit
)
699 catch_command_errors (source_command
, gdbinit
, 0, RETURN_MASK_ALL
);
702 for (i
= 0; i
< ncmd
; i
++)
705 /* NOTE: cagney/1999-11-03: SET_TOP_LEVEL() was a macro that
706 expanded into a call to setjmp(). */
707 if (!SET_TOP_LEVEL ()) /* NB: This is #if 0'd out */
709 /* NOTE: I am commenting this out, because it is not clear
710 where this feature is used. It is very old and
711 undocumented. ezannoni: 1999-05-04 */
713 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
714 read_command_file (stdin
);
717 source_command (cmdarg
[i
], !batch
);
718 do_cleanups (ALL_CLEANUPS
);
721 catch_command_errors (source_command
, cmdarg
[i
], !batch
, RETURN_MASK_ALL
);
725 /* Read in the old history after all the command files have been read. */
731 /* Either there was a problem executing the command in the
732 batch file aborted early, or the batch file forgot to do an
733 explicit detach. Explicitly detach the inferior ensuring
734 that there are no zombies. */
735 target_detach (NULL
, 0);
737 /* We have hit the end of the batch file. */
741 /* Do any host- or target-specific hacks. This is used for i960 targets
742 to force the user to set a nindy target and spec its parameters. */
744 #ifdef BEFORE_MAIN_LOOP_HOOK
745 BEFORE_MAIN_LOOP_HOOK
;
748 /* Show time and/or space usage. */
752 long init_time
= get_run_time () - time_at_startup
;
754 printf_unfiltered (_("Startup time: %ld.%06ld\n"),
755 init_time
/ 1000000, init_time
% 1000000);
761 extern char **environ
;
762 char *lim
= (char *) sbrk (0);
764 printf_unfiltered (_("Startup size: data size %ld\n"),
765 (long) (lim
- (char *) &environ
));
770 /* FIXME: cagney/1999-11-06: The original main loop was like: */
773 if (!SET_TOP_LEVEL ())
775 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
776 /* GUIs generally have their own command loop, mainloop, or whatever.
777 This is a good place to gain control because many error
778 conditions will end up here via longjmp(). */
779 if (deprecated_command_loop_hook
)
780 deprecated_command_loop_hook ();
782 deprecated_command_loop ();
783 quit_command ((char *) 0, instream
== stdin
);
786 /* NOTE: If the command_loop() returned normally, the loop would
787 attempt to exit by calling the function quit_command(). That
788 function would either call exit() or throw an error returning
789 control to SET_TOP_LEVEL. */
790 /* NOTE: The function do_cleanups() was called once each time round
791 the loop. The usefulness of the call isn't clear. If an error
792 was thrown, everything would have already been cleaned up. If
793 command_loop() returned normally and quit_command() was called,
794 either exit() or error() (again cleaning up) would be called. */
796 /* NOTE: cagney/1999-11-07: There is probably no reason for not
797 moving this loop and the code found in captured_command_loop()
798 into the command_loop() proper. The main thing holding back that
799 change - SET_TOP_LEVEL() - has been eliminated. */
802 catch_errors (captured_command_loop
, 0, "", RETURN_MASK_ALL
);
804 /* No exit -- exit is through quit_command. */
808 gdb_main (struct captured_main_args
*args
)
810 use_windows
= args
->use_windows
;
811 catch_errors (captured_main
, args
, "", RETURN_MASK_ALL
);
812 /* The only way to end up here is by an error (normal exit is
813 handled by quit_force()), hence always return an error status. */
818 /* Don't use *_filtered for printing help. We don't want to prompt
819 for continue no matter how small the screen or how much we're going
823 print_gdb_help (struct ui_file
*stream
)
825 fputs_unfiltered (_("\
826 This is the GNU debugger. Usage:\n\n\
827 gdb [options] [executable-file [core-file or process-id]]\n\
828 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
831 fputs_unfiltered (_("\
832 --args Arguments after executable-file are passed to inferior\n\
834 fputs_unfiltered (_("\
835 --[no]async Enable (disable) asynchronous version of CLI\n\
837 fputs_unfiltered (_("\
838 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
839 --batch Exit after processing options.\n\
840 --cd=DIR Change current directory to DIR.\n\
841 --command=FILE Execute GDB commands from FILE.\n\
842 --core=COREFILE Analyze the core dump COREFILE.\n\
843 --pid=PID Attach to running process PID.\n\
845 fputs_unfiltered (_("\
846 --dbx DBX compatibility mode.\n\
847 --directory=DIR Search for source files in DIR.\n\
848 --epoch Output information used by epoch emacs-GDB interface.\n\
849 --exec=EXECFILE Use EXECFILE as the executable.\n\
850 --fullname Output information used by emacs-GDB interface.\n\
851 --help Print this message.\n\
853 fputs_unfiltered (_("\
854 --interpreter=INTERP\n\
855 Select a specific interpreter / user interface\n\
857 fputs_unfiltered (_("\
858 -l TIMEOUT Set timeout in seconds for remote debugging.\n\
859 --mapped Use mapped symbol files if supported on this system.\n\
860 --nw Do not use a window interface.\n\
861 --nx Do not read "), stream
);
862 fputs_unfiltered (gdbinit
, stream
);
863 fputs_unfiltered (_(" file.\n\
864 --quiet Do not print version number on startup.\n\
865 --readnow Fully read symbol files on first access.\n\
867 fputs_unfiltered (_("\
868 --se=FILE Use FILE as symbol file and executable file.\n\
869 --symbols=SYMFILE Read symbols from SYMFILE.\n\
870 --tty=TTY Use TTY for input/output by the program being debugged.\n\
873 fputs_unfiltered (_("\
874 --tui Use a terminal user interface.\n\
877 fputs_unfiltered (_("\
878 --version Print version information and then exit.\n\
879 -w Use a window interface.\n\
880 --write Set writing into executable and core files.\n\
881 --xdb XDB compatibility mode.\n\
883 fputs_unfiltered (_("\n\
884 For more information, type \"help\" from within GDB, or consult the\n\
885 GDB manual (available as on-line info or a printed manual).\n\
886 Report bugs to \"bug-gdb@gnu.org\".\