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04497f0b NW |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | */ | |
8 | ||
9 | #ifndef lint | |
10 | static char sccsid[] = "@(#)main.c 6.6 (Berkeley) 5/13/91"; | |
11 | #endif /* not lint */ | |
12 | ||
13 | /* Top level for GDB, the GNU debugger. | |
14 | Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. | |
15 | ||
16 | This file is part of GDB. | |
17 | ||
18 | GDB is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 1, or (at your option) | |
21 | any later version. | |
22 | ||
23 | GDB is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with GDB; see the file COPYING. If not, write to | |
30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
32 | #include <stdio.h> | |
33 | #include "defs.h" | |
34 | #include "command.h" | |
35 | #include "param.h" | |
36 | #include "expression.h" | |
37 | ||
38 | #ifdef USG | |
39 | #include <sys/types.h> | |
40 | #include <unistd.h> | |
41 | #endif | |
42 | ||
43 | #include <sys/file.h> | |
44 | #include <setjmp.h> | |
45 | #include <signal.h> | |
46 | #include <sys/param.h> | |
47 | #include <sys/stat.h> | |
48 | #include <ctype.h> | |
49 | ||
50 | #ifdef SET_STACK_LIMIT_HUGE | |
51 | #include <sys/time.h> | |
52 | #include <sys/resource.h> | |
53 | ||
54 | int original_stack_limit; | |
55 | #endif | |
56 | ||
57 | /* If this definition isn't overridden by the header files, assume | |
58 | that isatty and fileno exist on this system. */ | |
59 | #ifndef ISATTY | |
60 | #define ISATTY(FP) (isatty (fileno (FP))) | |
61 | #endif | |
62 | ||
63 | extern void free (); | |
64 | ||
65 | /* Version number of GDB, as a string. */ | |
66 | ||
67 | extern char *version; | |
68 | ||
69 | /* | |
70 | * Declare all cmd_list_element's | |
71 | */ | |
72 | ||
73 | /* Chain containing all defined commands. */ | |
74 | ||
75 | struct cmd_list_element *cmdlist; | |
76 | ||
77 | /* Chain containing all defined info subcommands. */ | |
78 | ||
79 | struct cmd_list_element *infolist; | |
80 | ||
81 | /* Chain containing all defined enable subcommands. */ | |
82 | ||
83 | struct cmd_list_element *enablelist; | |
84 | ||
85 | /* Chain containing all defined disable subcommands. */ | |
86 | ||
87 | struct cmd_list_element *disablelist; | |
88 | ||
89 | /* Chain containing all defined delete subcommands. */ | |
90 | ||
91 | struct cmd_list_element *deletelist; | |
92 | ||
93 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
94 | ||
95 | struct cmd_list_element *enablebreaklist; | |
96 | ||
97 | /* Chain containing all defined set subcommands */ | |
98 | ||
99 | struct cmd_list_element *setlist; | |
100 | ||
101 | /* Chain containing all defined \"set history\". */ | |
102 | ||
103 | struct cmd_list_element *sethistlist; | |
104 | ||
105 | /* Chain containing all defined \"unset history\". */ | |
106 | ||
107 | struct cmd_list_element *unsethistlist; | |
108 | ||
109 | /* stdio stream that command input is being read from. */ | |
110 | ||
111 | FILE *instream; | |
112 | ||
113 | /* Current working directory. */ | |
114 | ||
115 | char *current_directory; | |
116 | ||
117 | /* The directory name is actually stored here (usually). */ | |
118 | static char dirbuf[MAXPATHLEN]; | |
119 | ||
120 | #ifdef KERNELDEBUG | |
121 | /* Nonzero if we're debugging /dev/mem or a kernel crash dump */ | |
122 | ||
123 | int kernel_debugging; | |
124 | #endif | |
125 | ||
126 | /* Nonzero to inhibit confirmation of quitting or restarting | |
127 | a stopped inferior. */ | |
128 | int inhibit_confirm; | |
129 | ||
130 | /* Nonzero if we can write in text or core file */ | |
131 | ||
132 | int writeable_text; | |
133 | ||
134 | /* The number of lines on a page, and the number of spaces | |
135 | in a line. */ | |
136 | int linesize, pagesize; | |
137 | ||
138 | /* Nonzero if we should refrain from using an X window. */ | |
139 | ||
140 | int inhibit_windows = 0; | |
141 | ||
142 | /* Function to call before reading a command, if nonzero. | |
143 | The function receives two args: an input stream, | |
144 | and a prompt string. */ | |
145 | ||
146 | void (*window_hook) (); | |
147 | ||
148 | extern int frame_file_full_name; | |
149 | int xgdb_verbose; | |
150 | ||
151 | void execute_command(); | |
152 | void free_command_lines (); | |
153 | char *gdb_readline (); | |
154 | char *command_line_input (); | |
155 | static void initialize_main (); | |
156 | static void initialize_cmd_lists (); | |
157 | void command_loop (); | |
158 | static void source_command (); | |
159 | static void print_gdb_version (); | |
160 | static void float_handler (); | |
161 | static void cd_command (); | |
162 | ||
163 | char *getenv (); | |
164 | ||
165 | /* gdb prints this when reading a command interactively */ | |
166 | static char *prompt; | |
167 | ||
168 | /* Buffer used for reading command lines, and the size | |
169 | allocated for it so far. */ | |
170 | ||
171 | char *line; | |
172 | int linesize; | |
173 | ||
174 | \f | |
175 | /* This is how `error' returns to command level. */ | |
176 | ||
177 | jmp_buf to_top_level; | |
178 | ||
179 | void | |
180 | return_to_top_level () | |
181 | { | |
182 | quit_flag = 0; | |
183 | immediate_quit = 0; | |
184 | clear_breakpoint_commands (); | |
185 | clear_momentary_breakpoints (); | |
186 | disable_current_display (); | |
187 | do_cleanups (0); | |
188 | longjmp (to_top_level, 1); | |
189 | } | |
190 | ||
191 | /* Call FUNC with arg ARG, catching any errors. | |
192 | If there is no error, return the value returned by FUNC. | |
193 | If there is an error, return zero after printing ERRSTRING | |
194 | (which is in addition to the specific error message already printed). */ | |
195 | ||
196 | int | |
197 | catch_errors (func, arg, errstring) | |
198 | int (*func) (); | |
199 | int arg; | |
200 | char *errstring; | |
201 | { | |
202 | jmp_buf saved; | |
203 | int val; | |
204 | struct cleanup *saved_cleanup_chain; | |
205 | ||
206 | saved_cleanup_chain = save_cleanups (); | |
207 | ||
208 | bcopy (to_top_level, saved, sizeof (jmp_buf)); | |
209 | ||
210 | if (setjmp (to_top_level) == 0) | |
211 | val = (*func) (arg); | |
212 | else | |
213 | { | |
214 | fprintf (stderr, "%s\n", errstring); | |
215 | val = 0; | |
216 | } | |
217 | ||
218 | restore_cleanups (saved_cleanup_chain); | |
219 | ||
220 | bcopy (saved, to_top_level, sizeof (jmp_buf)); | |
221 | return val; | |
222 | } | |
223 | ||
224 | /* Handler for SIGHUP. */ | |
225 | ||
226 | static void | |
227 | disconnect () | |
228 | { | |
229 | kill_inferior_fast (); | |
230 | signal (SIGHUP, SIG_DFL); | |
231 | kill (getpid (), SIGHUP); | |
232 | } | |
233 | \f | |
234 | /* Clean up on error during a "source" command (or execution of a | |
235 | user-defined command). | |
236 | Close the file opened by the command | |
237 | and restore the previous input stream. */ | |
238 | ||
239 | static void | |
240 | source_cleanup (stream) | |
241 | FILE *stream; | |
242 | { | |
243 | /* Instream may be 0; set to it when executing user-defined command. */ | |
244 | if (instream) | |
245 | fclose (instream); | |
246 | instream = stream; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Source $HOME/.gdbinit and $cwd/.gdbinit. | |
251 | * If X is enabled, also $HOME/.xgdbinit and $cwd/.xgdbinit.source | |
252 | */ | |
253 | void | |
254 | source_init_files() | |
255 | { | |
256 | char *homedir, initfile[256]; | |
257 | int samedir = 0; | |
258 | ||
259 | /* Read init file, if it exists in home directory */ | |
260 | homedir = getenv ("HOME"); | |
261 | if (homedir) { | |
262 | struct stat homebuf, cwdbuf; | |
263 | ||
264 | sprintf(initfile, "%s/.gdbinit", homedir); | |
265 | if (access (initfile, R_OK) == 0) | |
266 | if (!setjmp (to_top_level)) | |
267 | source_command (initfile); | |
268 | if (!inhibit_windows) { | |
269 | sprintf(initfile, "%s/.xgdbinit", homedir); | |
270 | if (access (initfile, R_OK) == 0) | |
271 | if (!setjmp (to_top_level)) | |
272 | source_command (initfile); | |
273 | } | |
274 | /* Determine if current directory is the same as the home | |
275 | directory, so we don't source the same file twice. */ | |
276 | ||
277 | bzero (&homebuf, sizeof (struct stat)); | |
278 | bzero (&cwdbuf, sizeof (struct stat)); | |
279 | ||
280 | stat(homedir, &homebuf); | |
281 | stat(".", &cwdbuf); | |
282 | ||
283 | samedir = bcmp(&homebuf, &cwdbuf, sizeof(struct stat)) == 0; | |
284 | } | |
285 | /* Read the input file in the current directory, *if* it isn't | |
286 | the same file (it should exist, also). */ | |
287 | if (!samedir) { | |
288 | if (access (".gdbinit", R_OK) == 0) | |
289 | if (!setjmp (to_top_level)) | |
290 | source_command (".gdbinit"); | |
291 | if (access (".xgdbinit", R_OK) == 0) | |
292 | if (!setjmp (to_top_level)) | |
293 | source_command (".xgdbinit"); | |
294 | } | |
295 | } | |
296 | ||
297 | \f | |
298 | int | |
299 | main (argc, argv, envp) | |
300 | int argc; | |
301 | char **argv; | |
302 | char **envp; | |
303 | { | |
304 | int count; | |
305 | int inhibit_gdbinit = 0; | |
306 | int quiet = 1; | |
307 | int batch = 0; | |
308 | register int i; | |
309 | char *cp; | |
310 | ||
311 | /* XXX Windows only for xgdb. */ | |
312 | char *strrchr(); | |
313 | if (cp = strrchr(argv[0], '/')) | |
314 | ++cp; | |
315 | else | |
316 | cp = argv[0]; | |
317 | if (*cp != 'x') | |
318 | inhibit_windows = 1; | |
319 | ||
320 | #if defined (ALIGN_STACK_ON_STARTUP) | |
321 | i = (int) &count & 0x3; | |
322 | if (i != 0) | |
323 | alloca (4 - i); | |
324 | #endif | |
325 | ||
326 | quit_flag = 0; | |
327 | linesize = 100; | |
328 | line = (char *) xmalloc (linesize); | |
329 | *line = 0; | |
330 | instream = stdin; | |
331 | ||
332 | getwd (dirbuf); | |
333 | current_directory = dirbuf; | |
334 | ||
335 | #ifdef SET_STACK_LIMIT_HUGE | |
336 | { | |
337 | struct rlimit rlim; | |
338 | ||
339 | /* Set the stack limit huge so that alloca (particularly stringtab | |
340 | * in dbxread.c) does not fail. */ | |
341 | getrlimit (RLIMIT_STACK, &rlim); | |
342 | original_stack_limit = rlim.rlim_cur; | |
343 | rlim.rlim_cur = rlim.rlim_max; | |
344 | setrlimit (RLIMIT_STACK, &rlim); | |
345 | } | |
346 | #endif /* SET_STACK_LIMIT_HUGE */ | |
347 | ||
348 | /* Look for flag arguments. */ | |
349 | ||
350 | for (i = 1; i < argc; i++) | |
351 | { | |
352 | if (!strcmp (argv[i], "-q") || !strcmp (argv[i], "-quiet")) | |
353 | quiet = 1; | |
354 | else if (!strcmp (argv[i], "-nx")) | |
355 | inhibit_gdbinit = 1; | |
356 | else if (!strcmp (argv[i], "-nw")) | |
357 | inhibit_windows = 1; | |
358 | else if (!strcmp (argv[i], "-batch")) | |
359 | batch = 1, quiet = 1; | |
360 | else if (!strcmp (argv[i], "-fullname")) | |
361 | frame_file_full_name = 1; | |
362 | else if (!strcmp (argv[i], "-xgdb_verbose")) | |
363 | xgdb_verbose = 1; | |
364 | /* -help: print a summary of command line switches. */ | |
365 | else if (!strcmp (argv[i], "-help")) | |
366 | { | |
367 | fputs ("\ | |
368 | This is GDB, the GNU debugger. Use the command\n\ | |
369 | gdb [options] [executable [core-file]]\n\ | |
370 | to enter the debugger.\n\ | |
371 | \n\ | |
372 | Options available are:\n\ | |
373 | -help Print this message.\n\ | |
374 | -quiet Do not print version number on startup.\n\ | |
375 | -fullname Output information used by emacs-GDB interface.\n\ | |
376 | -batch Exit after processing options.\n\ | |
377 | -nx Do not read .gdbinit file.\n\ | |
378 | -tty TTY Use TTY for input/output by the program being debugged.\n\ | |
379 | -cd DIR Change current directory to DIR.\n\ | |
380 | -directory DIR Search for source files in DIR.\n\ | |
381 | -command FILE Execute GDB commands from FILE.\n\ | |
382 | -symbols SYMFILE Read symbols from SYMFILE.\n\ | |
383 | -exec EXECFILE Use EXECFILE as the executable.\n\ | |
384 | -se FILE Use FILE as symbol file and executable file.\n\ | |
385 | -core COREFILE Analyze the core dump COREFILE.\n\ | |
386 | -k Kernel debugging.\n\ | |
387 | -w Writeable text.\n\ | |
388 | -v Print GNU message and version number on startup.\n\ | |
389 | -nc Don't confirm quit or run commands.\n\ | |
390 | \n\ | |
391 | For more information, type \"help\" from within GDB, or consult the\n\ | |
392 | GDB manual (available as on-line info or a printed manual).\n", stderr); | |
393 | /* Exiting after printing this message seems like | |
394 | the most useful thing to do. */ | |
395 | exit (0); | |
396 | } | |
397 | #ifdef KERNELDEBUG | |
398 | else if (!strcmp (argv[i], "-k")) | |
399 | kernel_debugging = 1; | |
400 | #endif | |
401 | else if (!strcmp (argv[i], "-w")) | |
402 | writeable_text = 1; | |
403 | else if (!strcmp (argv[i], "-v")) | |
404 | quiet = 0; | |
405 | else if (!strcmp (argv[i], "-nc")) | |
406 | inhibit_confirm = 1; | |
407 | else if (argv[i][0] == '-') | |
408 | /* Other options take arguments, so don't confuse an | |
409 | argument with an option. */ | |
410 | i++; | |
411 | } | |
412 | ||
413 | /* Run the init function of each source file */ | |
414 | ||
415 | initialize_cmd_lists (); /* This needs to be done first */ | |
416 | initialize_all_files (); | |
417 | initialize_main (); /* But that omits this file! Do it now */ | |
418 | initialize_signals (); | |
419 | ||
420 | if (!quiet) | |
421 | print_gdb_version (); | |
422 | ||
423 | /* Process the command line arguments. */ | |
424 | ||
425 | count = 0; | |
426 | for (i = 1; i < argc; i++) | |
427 | { | |
428 | register char *arg = argv[i]; | |
429 | /* Args starting with - say what to do with the following arg | |
430 | as a filename. */ | |
431 | if (arg[0] == '-') | |
432 | { | |
433 | extern void exec_file_command (), symbol_file_command (); | |
434 | extern void core_file_command (), directory_command (); | |
435 | extern void tty_command (); | |
436 | ||
437 | if (!strcmp (arg, "-q") || !strcmp (arg, "-nx") | |
438 | || !strcmp (arg, "-quiet") || !strcmp (arg, "-batch") | |
439 | || !strcmp (arg, "-fullname") || !strcmp (arg, "-nw") | |
440 | || !strcmp (arg, "-xgdb_verbose") | |
441 | || !strcmp (arg, "-help") | |
442 | || !strcmp (arg, "-k") | |
443 | || !strcmp (arg, "-w") | |
444 | || !strcmp (arg, "-v") | |
445 | || !strcmp (arg, "-nc")) | |
446 | /* Already processed above */ | |
447 | continue; | |
448 | ||
449 | if (++i == argc) | |
450 | fprintf (stderr, "No argument follows \"%s\".\n", arg); | |
451 | if (!setjmp (to_top_level)) | |
452 | { | |
453 | /* -s foo: get syms from foo. -e foo: execute foo. | |
454 | -se foo: do both with foo. -c foo: use foo as core dump. */ | |
455 | if (!strcmp (arg, "-se")) | |
456 | { | |
457 | exec_file_command (argv[i], !batch); | |
458 | symbol_file_command (argv[i], !batch); | |
459 | } | |
460 | else if (!strcmp (arg, "-s") || !strcmp (arg, "-symbols")) | |
461 | symbol_file_command (argv[i], !batch); | |
462 | else if (!strcmp (arg, "-e") || !strcmp (arg, "-exec")) | |
463 | exec_file_command (argv[i], !batch); | |
464 | else if (!strcmp (arg, "-c") || !strcmp (arg, "-core")) | |
465 | core_file_command (argv[i], !batch); | |
466 | /* -x foo: execute commands from foo. */ | |
467 | else if (!strcmp (arg, "-x") || !strcmp (arg, "-command") | |
468 | || !strcmp (arg, "-commands")) | |
469 | source_command (argv[i]); | |
470 | /* -d foo: add directory `foo' to source-file directory | |
471 | search-list */ | |
472 | else if (!strcmp (arg, "-d") || !strcmp (arg, "-dir") | |
473 | || !strcmp (arg, "-directory")) | |
474 | directory_command (argv[i], 0); | |
475 | /* -cd FOO: specify current directory as FOO. | |
476 | GDB remembers the precise string FOO as the dirname. */ | |
477 | else if (!strcmp (arg, "-cd")) | |
478 | { | |
479 | cd_command (argv[i], 0); | |
480 | init_source_path (); | |
481 | } | |
482 | /* -t /def/ttyp1: use /dev/ttyp1 for inferior I/O. */ | |
483 | else if (!strcmp (arg, "-t") || !strcmp (arg, "-tty")) | |
484 | tty_command (argv[i], 0); | |
485 | ||
486 | else | |
487 | error ("Unknown command-line switch: \"%s\"\n", arg); | |
488 | } | |
489 | } | |
490 | else | |
491 | { | |
492 | /* Args not thus accounted for | |
493 | are treated as, first, the symbol/executable file | |
494 | and, second, the core dump file. */ | |
495 | count++; | |
496 | if (!setjmp (to_top_level)) | |
497 | switch (count) | |
498 | { | |
499 | case 1: | |
500 | exec_file_command (arg, !batch); | |
501 | symbol_file_command (arg, !batch); | |
502 | break; | |
503 | ||
504 | case 2: | |
505 | core_file_command (arg, !batch); | |
506 | break; | |
507 | ||
508 | case 3: | |
509 | fprintf (stderr, "Excess command line args ignored. (%s%s)\n", | |
510 | arg, (i == argc - 1) ? "" : " ..."); | |
511 | } | |
512 | } | |
513 | } | |
514 | ||
515 | if (!inhibit_gdbinit) | |
516 | source_init_files(); | |
517 | ||
518 | if (batch) | |
519 | { | |
520 | #if 0 | |
521 | fatal ("Attempt to read commands from stdin in batch mode."); | |
522 | #endif | |
523 | /* We have hit the end of the batch file. */ | |
524 | exit (0); | |
525 | } | |
526 | ||
527 | if (!quiet) | |
528 | printf ("Type \"help\" for a list of commands.\n"); | |
529 | ||
530 | /* The command loop. */ | |
531 | ||
532 | while (1) | |
533 | { | |
534 | if (!setjmp (to_top_level)) | |
535 | command_loop (); | |
536 | if (ISATTY(stdin)) | |
537 | clearerr (stdin); /* Don't get hung if C-d is typed. */ | |
538 | else if (feof(instream)) /* Avoid endless loops for redirected stdin */ | |
539 | break; | |
540 | } | |
541 | exit (0); | |
542 | } | |
543 | ||
544 | ||
545 | static void | |
546 | do_nothing () | |
547 | { | |
548 | } | |
549 | ||
550 | /* Read commands from `instream' and execute them | |
551 | until end of file. */ | |
552 | void | |
553 | command_loop () | |
554 | { | |
555 | struct cleanup *old_chain; | |
556 | register int toplevel = (instream == stdin); | |
557 | register int interactive = (toplevel && ISATTY(stdin)); | |
558 | ||
559 | while (!feof (instream)) | |
560 | { | |
561 | register char *cmd_line; | |
562 | ||
563 | quit_flag = 0; | |
564 | if (interactive) | |
565 | reinitialize_more_filter (); | |
566 | old_chain = make_cleanup (do_nothing, 0); | |
567 | cmd_line = command_line_input (prompt, toplevel); | |
568 | execute_command (cmd_line, toplevel); | |
569 | /* Do any commands attached to breakpoint we stopped at. */ | |
570 | do_breakpoint_commands (); | |
571 | do_cleanups (old_chain); | |
572 | } | |
573 | } | |
574 | \f | |
575 | /* Commands call this if they do not want to be repeated by null lines. */ | |
576 | ||
577 | void | |
578 | dont_repeat () | |
579 | { | |
580 | /* If we aren't reading from standard input, we are saving the last | |
581 | thing read from stdin in line and don't want to delete it. Null lines | |
582 | won't repeat here in any case. */ | |
583 | if (instream == stdin) | |
584 | *line = 0; | |
585 | } | |
586 | \f | |
587 | /* Read a line from the stream "instream" without command line editing. | |
588 | ||
589 | It prints PROMPT once at the start. | |
590 | Action is compatible with "readline" (i.e., space for typing is | |
591 | malloced & should be freed by caller). */ | |
592 | char * | |
593 | gdb_readline (prompt) | |
594 | char *prompt; | |
595 | { | |
596 | int c; | |
597 | char *result; | |
598 | int input_index = 0; | |
599 | int result_size = 80; | |
600 | ||
601 | if (prompt) | |
602 | { | |
603 | printf (prompt); | |
604 | fflush (stdout); | |
605 | } | |
606 | ||
607 | result = (char *) xmalloc (result_size); | |
608 | ||
609 | while (1) | |
610 | { | |
611 | c = fgetc (instream ? instream : stdin); | |
612 | if (c == EOF) | |
613 | { | |
614 | free(result); | |
615 | return ((char *)0); | |
616 | } | |
617 | if (c == '\n') | |
618 | break; | |
619 | ||
620 | result[input_index++] = c; | |
621 | if (input_index >= result_size) | |
622 | { | |
623 | result_size <= 1; | |
624 | result = (char *)xrealloc(result, result_size); | |
625 | } | |
626 | } | |
627 | result[input_index++] = '\0'; | |
628 | return result; | |
629 | } | |
630 | ||
631 | /* Declaration for fancy readline with command line editing. */ | |
632 | char *readline (); | |
633 | ||
634 | /* Variables which control command line editing and history | |
635 | substitution. These variables are given default values at the end | |
636 | of this file. */ | |
637 | static int command_editing_p; | |
638 | static int history_expansion_p; | |
639 | static int write_history_p; | |
640 | static int history_size; | |
641 | static char *history_filename; | |
642 | ||
643 | /* Variables which are necessary for fancy command line editing. */ | |
644 | char *gdb_completer_word_break_characters = | |
645 | " \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,"; | |
646 | ||
647 | /* Functions that are used as part of the fancy command line editing. */ | |
648 | ||
649 | /* Generate symbol names one by one for the completer. If STATE is | |
650 | zero, then we need to initialize, otherwise the initialization has | |
651 | already taken place. TEXT is what we expect the symbol to start | |
652 | with. RL_LINE_BUFFER is available to be looked at; it contains the | |
653 | entire text of the line. RL_POINT is the offset in that line of | |
654 | the cursor. You should pretend that the line ends at RL_POINT. */ | |
655 | char * | |
656 | symbol_completion_function (text, state) | |
657 | char *text; | |
658 | int state; | |
659 | { | |
660 | char **make_symbol_completion_list (); | |
661 | static char **list = (char **)NULL; | |
662 | static int index; | |
663 | char *output; | |
664 | extern char *rl_line_buffer; | |
665 | extern int rl_point; | |
666 | char *tmp_command, *p; | |
667 | struct cmd_list_element *c, *result_list; | |
668 | ||
669 | if (!state) | |
670 | { | |
671 | /* Free the storage used by LIST, but not by the strings inside. This is | |
672 | because rl_complete_internal () frees the strings. */ | |
673 | if (list) | |
674 | free (list); | |
675 | list = 0; | |
676 | index = 0; | |
677 | ||
678 | /* Decide whether to complete on a list of gdb commands or on | |
679 | symbols. */ | |
680 | tmp_command = (char *) alloca (rl_point + 1); | |
681 | p = tmp_command; | |
682 | ||
683 | strncpy (tmp_command, rl_line_buffer, rl_point); | |
684 | tmp_command[rl_point] = '\0'; | |
685 | ||
686 | if (rl_point == 0) | |
687 | { | |
688 | /* An empty line we want to consider ambiguous; that is, | |
689 | it could be any command. */ | |
690 | c = (struct cmd_list_element *) -1; | |
691 | result_list = 0; | |
692 | } | |
693 | else | |
694 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
695 | ||
696 | /* Move p up to the next interesting thing. */ | |
697 | while (*p == ' ' || *p == '\t') | |
698 | p++; | |
699 | ||
700 | if (!c) | |
701 | /* He's typed something unrecognizable. Sigh. */ | |
702 | list = (char **) 0; | |
703 | else if (c == (struct cmd_list_element *) -1) | |
704 | { | |
705 | if (p + strlen(text) != tmp_command + rl_point) | |
706 | error ("Unrecognized command."); | |
707 | ||
708 | /* He's typed something ambiguous. This is easier. */ | |
709 | if (result_list) | |
710 | list = complete_on_cmdlist (*result_list->prefixlist, text); | |
711 | else | |
712 | list = complete_on_cmdlist (cmdlist, text); | |
713 | } | |
714 | else | |
715 | { | |
716 | /* If we've gotten this far, gdb has recognized a full | |
717 | command. There are several possibilities: | |
718 | ||
719 | 1) We need to complete on the command. | |
720 | 2) We need to complete on the possibilities coming after | |
721 | the command. | |
722 | 2) We need to complete the text of what comes after the | |
723 | command. */ | |
724 | ||
725 | if (!*p && *text) | |
726 | /* Always (might be longer versions of thie command). */ | |
727 | list = complete_on_cmdlist (result_list, text); | |
728 | else if (!*p && !*text) | |
729 | { | |
730 | if (c->prefixlist) | |
731 | list = complete_on_cmdlist (*c->prefixlist, ""); | |
732 | else | |
733 | list = make_symbol_completion_list (""); | |
734 | } | |
735 | else | |
736 | { | |
737 | if (c->prefixlist && !c->allow_unknown) | |
738 | { | |
739 | *p = '\0'; | |
740 | error ("\"%s\" command requires a subcommand.", | |
741 | tmp_command); | |
742 | } | |
743 | else | |
744 | list = make_symbol_completion_list (text); | |
745 | } | |
746 | } | |
747 | } | |
748 | ||
749 | /* If the debugged program wasn't compiled with symbols, or if we're | |
750 | clearly completing on a command and no command matches, return | |
751 | NULL. */ | |
752 | if (!list) | |
753 | return ((char *)NULL); | |
754 | ||
755 | output = list[index]; | |
756 | if (output) | |
757 | index++; | |
758 | ||
759 | return (output); | |
760 | } | |
761 | \f | |
762 | ||
763 | void | |
764 | print_prompt () | |
765 | { | |
766 | if (prompt) | |
767 | { | |
768 | printf ("%s", prompt); | |
769 | fflush (stdout); | |
770 | } | |
771 | } | |
772 | \f | |
773 | ||
774 | #ifdef HAVE_TERMIO | |
775 | #include <termio.h> | |
776 | static struct termio norm_tty; | |
777 | ||
778 | static void | |
779 | suspend_sig() | |
780 | { | |
781 | int tty = fileno(stdin); | |
782 | struct termio cur_tty; | |
783 | ||
784 | ioctl(tty, TCGETA, &cur_tty); | |
785 | ioctl(tty, TCSETAW, &norm_tty); | |
786 | ||
787 | (void) sigsetmask(0); | |
788 | signal(SIGTSTP, SIG_DFL); | |
789 | kill(0, SIGTSTP); | |
790 | ||
791 | /* | |
792 | * we've just been resumed -- current tty params become new | |
793 | * 'normal' params (in case tset/stty was done while we were | |
794 | * suspended). Merge values that readline might have changed | |
795 | * into new params, then restore term mode. | |
796 | */ | |
797 | ioctl(tty, TCGETA, &norm_tty); | |
798 | cur_tty.c_lflag = (cur_tty.c_lflag & (ICANON|ECHO|ISIG)) | | |
799 | (norm_tty.c_lflag &~ (ICANON|ECHO|ISIG)); | |
800 | cur_tty.c_iflag = (cur_tty.c_iflag & (IXON|ISTRIP|INPCK)) | | |
801 | (norm_tty.c_iflag &~ (IXON|ISTRIP|INPCK)); | |
802 | ioctl(tty, TCSETAW, &cur_tty); | |
803 | ||
804 | signal(SIGTSTP, suspend_sig); | |
805 | print_prompt(); | |
806 | ||
807 | /* | |
808 | * Forget about any previous command -- null line now will do | |
809 | * nothing. | |
810 | */ | |
811 | dont_repeat(); | |
812 | } | |
813 | ||
814 | #else | |
815 | ||
816 | #include <sys/ioctl.h> | |
817 | #include <fcntl.h> | |
818 | #include <sgtty.h> | |
819 | ||
820 | static struct sgttyb norm_tty; | |
821 | static struct tchars norm_tchars; | |
822 | static struct ltchars norm_ltchars; | |
823 | static int norm_lflags; | |
824 | ||
825 | #ifdef PASS8 | |
826 | #define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK|PASS8) | |
827 | #else | |
828 | #define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK) | |
829 | #endif | |
830 | ||
831 | static void | |
832 | suspend_sig() | |
833 | { | |
834 | int tty = fileno(stdin); | |
835 | struct sgttyb cur_tty; | |
836 | struct tchars cur_tchars; | |
837 | struct ltchars cur_ltchars; | |
838 | int cur_lflags; | |
839 | int cur_flags; | |
840 | ||
841 | ioctl(tty, TIOCGETP, &cur_tty); | |
842 | ioctl(tty, TIOCGETC, &cur_tchars); | |
843 | ioctl(tty, TIOCLGET, &cur_lflags); | |
844 | ioctl(tty, TIOCGLTC, &cur_ltchars); | |
845 | ||
846 | ioctl(tty, TIOCSETP, &norm_tty); | |
847 | ioctl(tty, TIOCSETC, &norm_tchars); | |
848 | ioctl(tty, TIOCLSET, &norm_lflags); | |
849 | ioctl(tty, TIOCSLTC, &norm_ltchars); | |
850 | ||
851 | (void) sigsetmask(0); | |
852 | signal(SIGTSTP, SIG_DFL); | |
853 | kill(0, SIGTSTP); | |
854 | ||
855 | /* | |
856 | * we've just been resumed -- current tty params become new | |
857 | * 'normal' params (in case tset/stty was done while we were | |
858 | * suspended). Merge values that readline might have changed | |
859 | * into new params, then restore term mode. | |
860 | */ | |
861 | ioctl(tty, TIOCGETP, &norm_tty); | |
862 | cur_flags = cur_tty.sg_flags; | |
863 | cur_tty = norm_tty; | |
864 | cur_tty.sg_flags = (cur_tty.sg_flags &~ RL_TFLAGS) | |
865 | | (cur_flags & RL_TFLAGS); | |
866 | ||
867 | ioctl(tty, TIOCLGET, &norm_lflags); | |
868 | #ifdef LPASS8 | |
869 | cur_lflags = (cur_lflags &~ LPASS8) | (cur_flags & LPASS8); | |
870 | #endif | |
871 | ioctl(tty, TIOCGETC, &norm_tchars); | |
872 | ioctl(tty, TIOCGLTC, &norm_ltchars); | |
873 | ||
874 | ioctl(tty, TIOCSETP, &cur_tty); | |
875 | ioctl(tty, TIOCSETC, &cur_tchars); | |
876 | ioctl(tty, TIOCLSET, &cur_lflags); | |
877 | ioctl(tty, TIOCSLTC, &cur_ltchars); | |
878 | ||
879 | signal(SIGTSTP, suspend_sig); | |
880 | print_prompt(); | |
881 | ||
882 | /* | |
883 | * Forget about any previous command -- null line now will do | |
884 | * nothing. | |
885 | */ | |
886 | dont_repeat(); | |
887 | } | |
888 | #endif /* HAVE_TERMIO */ | |
889 | ||
890 | /* Initialize signal handlers. */ | |
891 | initialize_signals () | |
892 | { | |
893 | extern void request_quit (); | |
894 | int tty = fileno(stdin); | |
895 | ||
896 | signal (SIGINT, request_quit); | |
897 | ||
898 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
899 | passed to the inferior, which we don't want. It would be | |
900 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
901 | on BSD4.3 systems using vfork, that will (apparently) affect the | |
902 | GDB process as well as the inferior (the signal handling tables | |
903 | being shared between the two, apparently). Since we establish | |
904 | a handler for SIGQUIT, when we call exec it will set the signal | |
905 | to SIG_DFL for us. */ | |
906 | signal (SIGQUIT, do_nothing); | |
907 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
908 | signal (SIGHUP, disconnect); | |
909 | signal (SIGFPE, float_handler); | |
910 | ||
911 | ioctl(tty, TIOCGETP, &norm_tty); | |
912 | ioctl(tty, TIOCLGET, &norm_lflags); | |
913 | ioctl(tty, TIOCGETC, &norm_tchars); | |
914 | ioctl(tty, TIOCGLTC, &norm_ltchars); | |
915 | signal(SIGTSTP, suspend_sig); | |
916 | } | |
917 | ||
918 | char * | |
919 | finish_command_input(inputline, repeat, interactive) | |
920 | register char *inputline; | |
921 | int repeat; | |
922 | int interactive; | |
923 | { | |
924 | static char *do_free; | |
925 | ||
926 | if (do_free) { | |
927 | free(do_free); | |
928 | do_free = NULL; | |
929 | } | |
930 | ||
931 | /* Do history expansion if that is wished. */ | |
932 | if (interactive && history_expansion_p) { | |
933 | int expanded; | |
934 | ||
935 | expanded = history_expand(inputline, &do_free); | |
936 | if (expanded) { | |
937 | /* Print the changes. */ | |
938 | puts(do_free); | |
939 | ||
940 | /* An error acts like no input. */ | |
941 | if (expanded < 0) { | |
942 | *do_free = 0; | |
943 | return (do_free); | |
944 | } | |
945 | } | |
946 | inputline = do_free; | |
947 | } | |
948 | /* get rid of any leading whitespace */ | |
949 | while (isspace(*inputline)) | |
950 | ++inputline; | |
951 | /* | |
952 | * If we just got an empty line, and that is supposed to repeat the | |
953 | * previous command, return the value in the global buffer. | |
954 | */ | |
955 | if (*inputline == 0) { | |
956 | if (repeat) | |
957 | return (line); | |
958 | } else if (interactive) | |
959 | add_history(inputline); | |
960 | ||
961 | /* | |
962 | * If line is a comment, clear it out. | |
963 | * Note: comments are added to the command history. This is useful | |
964 | * when you type a command, and then realize you don't want to | |
965 | * execute it quite yet. You can comment out the command and then | |
966 | * later fetch it from the value history and remove the '#'. | |
967 | */ | |
968 | if (*inputline == '#') | |
969 | *inputline = 0; | |
970 | else if (repeat) { | |
971 | /* Save into global buffer. */ | |
972 | register int i = strlen(inputline) + 1; | |
973 | ||
974 | if (i > linesize) { | |
975 | line = xrealloc(line, i); | |
976 | linesize = i; | |
977 | } | |
978 | strcpy(line, inputline); | |
979 | } | |
980 | return (inputline); | |
981 | } | |
982 | ||
983 | static char * | |
984 | get_a_cmd_line(prompt, interactive) | |
985 | char *prompt; | |
986 | int interactive; | |
987 | { | |
988 | register char *cp; | |
989 | ||
990 | /* Control-C quits instantly if typed while reading input. */ | |
991 | immediate_quit++; | |
992 | if (interactive && command_editing_p) { | |
993 | extern void (*rl_event_hook)(); | |
994 | ||
995 | rl_event_hook = window_hook; | |
996 | cp = readline(prompt); | |
997 | } else { | |
998 | if (interactive) { | |
999 | if (window_hook) { | |
1000 | print_prompt(); | |
1001 | (*window_hook)(); | |
1002 | } | |
1003 | } else | |
1004 | prompt = NULL; | |
1005 | cp = gdb_readline(prompt); | |
1006 | } | |
1007 | --immediate_quit; | |
1008 | return (cp); | |
1009 | } | |
1010 | ||
1011 | /* Read one line from the command input stream `instream' | |
1012 | Returns the address of the start of the line. | |
1013 | ||
1014 | *If* the instream == stdin & stdin is a terminal, the line read | |
1015 | is copied into the file line saver (global var char *line, | |
1016 | length linesize) so that it can be duplicated. | |
1017 | ||
1018 | This routine either uses fancy command line editing or | |
1019 | simple input as the user has requested. */ | |
1020 | ||
1021 | char * | |
1022 | command_line_input(prompt, repeat) | |
1023 | char *prompt; | |
1024 | int repeat; | |
1025 | { | |
1026 | static char *do_free; | |
1027 | register int interactive = (instream == stdin && ISATTY(instream)); | |
1028 | register char *cp; | |
1029 | register int i; | |
1030 | ||
1031 | if (do_free) { | |
1032 | free(do_free); | |
1033 | do_free = NULL; | |
1034 | } | |
1035 | cp = get_a_cmd_line(prompt, interactive); | |
1036 | ||
1037 | /* | |
1038 | * handle continued lines (this loop is not particularly | |
1039 | * efficient because it's rare). | |
1040 | */ | |
1041 | while (cp && cp[i = strlen(cp) - 1] == '\\') { | |
1042 | register char *np = get_a_cmd_line(prompt, interactive); | |
1043 | register int j; | |
1044 | ||
1045 | if (np == NULL) { | |
1046 | cp[i] = 0; | |
1047 | break; | |
1048 | } | |
1049 | j = strlen(np); | |
1050 | cp = xrealloc(cp, i + j + 1); | |
1051 | strcpy(cp + i, np); | |
1052 | free(np); | |
1053 | } | |
1054 | if (cp == NULL) | |
1055 | return (""); | |
1056 | do_free = cp; | |
1057 | return (finish_command_input(cp, repeat, interactive)); | |
1058 | } | |
1059 | \f | |
1060 | ||
1061 | #define MAX_USER_ARGS 32 | |
1062 | ||
1063 | static struct user_args { | |
1064 | struct { | |
1065 | char *arg; | |
1066 | int len; | |
1067 | } a[10]; | |
1068 | } uargs[MAX_USER_ARGS]; | |
1069 | ||
1070 | static struct user_args *user_arg = uargs; | |
1071 | ||
1072 | static void | |
1073 | arg_cleanup(ap) | |
1074 | struct user_args *ap; | |
1075 | { | |
1076 | user_arg = ap; | |
1077 | } | |
1078 | ||
1079 | /* Bind arguments $arg0, $arg1, ..., for a user defined command. */ | |
1080 | struct cleanup * | |
1081 | setup_user_args(p) | |
1082 | char *p; | |
1083 | { | |
1084 | register int i; | |
1085 | struct cleanup *old_chain = make_cleanup(arg_cleanup, user_arg); | |
1086 | ||
1087 | if (++user_arg >= &uargs[MAX_USER_ARGS]) | |
1088 | error("user defined functions nested too deeply\n"); | |
1089 | ||
1090 | bzero(user_arg, sizeof(*user_arg)); | |
1091 | ||
1092 | i = 0; | |
1093 | while (*p) { | |
1094 | while (isspace(*p)) | |
1095 | ++p; | |
1096 | user_arg->a[i].arg = p; | |
1097 | while (*p && ! isspace(*p)) | |
1098 | ++p; | |
1099 | user_arg->a[i].len = p - user_arg->a[i].arg; | |
1100 | ++i; | |
1101 | } | |
1102 | return (old_chain); | |
1103 | } | |
1104 | ||
1105 | static char * | |
1106 | findarg(str) | |
1107 | register char *str; | |
1108 | { | |
1109 | register char *cp = str; | |
1110 | extern char *index(); | |
1111 | ||
1112 | while (cp = index(cp, '$')) { | |
1113 | if (strncmp(cp, "$arg", 4) == 0 && isdigit(cp[4])) | |
1114 | return (cp); | |
1115 | ++cp; | |
1116 | } | |
1117 | return (char *)0; | |
1118 | } | |
1119 | ||
1120 | /* expand arguments from "line" into "new" */ | |
1121 | static void | |
1122 | expand_args(line, new) | |
1123 | register char *line, *new; | |
1124 | { | |
1125 | register char *cp = findarg(line); | |
1126 | ||
1127 | while (cp = findarg(line)) { | |
1128 | int i, len; | |
1129 | ||
1130 | bcopy(line, new, cp - line); | |
1131 | new += cp - line; | |
1132 | i = cp[4] - '0'; | |
1133 | if (len = user_arg->a[i].len) { | |
1134 | bcopy(user_arg->a[i].arg, new, len); | |
1135 | new += len; | |
1136 | } | |
1137 | line = cp + 5; | |
1138 | } | |
1139 | strcpy(new, line); | |
1140 | } | |
1141 | ||
1142 | /* expand any arguments in "line" then execute the result */ | |
1143 | static void | |
1144 | expand_and_execute(line, from_tty) | |
1145 | char *line; | |
1146 | int from_tty; | |
1147 | { | |
1148 | void execute_command(); | |
1149 | char new[1024]; | |
1150 | ||
1151 | if (! findarg(line)) { | |
1152 | execute_command(line, from_tty); | |
1153 | return; | |
1154 | } | |
1155 | expand_args(line, new); | |
1156 | execute_command(new, from_tty); | |
1157 | } | |
1158 | ||
1159 | char * | |
1160 | read_one_command_line(prompt, from_tty) | |
1161 | char *prompt; | |
1162 | { | |
1163 | register char *p, *p1; | |
1164 | ||
1165 | dont_repeat(); | |
1166 | p = command_line_input(prompt, from_tty); | |
1167 | ||
1168 | /* Remove trailing blanks. */ | |
1169 | p1 = p + strlen(p); | |
1170 | while (--p1 > p && (*p1 == ' ' || *p1 == '\t')) | |
1171 | ; | |
1172 | *++p1 = 0; | |
1173 | return (p); | |
1174 | } | |
1175 | ||
1176 | static char cmd_prompt[] = " > "; | |
1177 | ||
1178 | int | |
1179 | parse_control_structure(rootcmd, from_tty, level) | |
1180 | struct command_line *rootcmd; | |
1181 | int from_tty; | |
1182 | { | |
1183 | struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); | |
1184 | char *prompt; | |
1185 | ||
1186 | ++level; | |
1187 | prompt = from_tty? &cmd_prompt[sizeof(cmd_prompt) - 1 - 2*level] : | |
1188 | (char *)0; | |
1189 | bzero(cmd, sizeof(*cmd)); | |
1190 | rootcmd->body = cmd; | |
1191 | while (1) { | |
1192 | char *p = read_one_command_line(prompt, from_tty); | |
1193 | ||
1194 | p = savestring(p, strlen(p)); | |
1195 | cmd->line = p; | |
1196 | if (!strncmp(p, "while ", 6)) { | |
1197 | cmd->type = CL_WHILE; | |
1198 | if (parse_control_structure(cmd, from_tty, level)) | |
1199 | return (1); | |
1200 | } else if (!strncmp(p, "if ", 3)) { | |
1201 | cmd->type = CL_IF; | |
1202 | if (parse_control_structure(cmd, from_tty, level)) { | |
1203 | struct command_line *tmp; | |
1204 | int stat; | |
1205 | ||
1206 | cmd->elsebody = cmd->body; | |
1207 | stat = parse_control_structure(cmd, from_tty, | |
1208 | level); | |
1209 | tmp = cmd->elsebody; | |
1210 | cmd->elsebody = cmd->body; | |
1211 | cmd->body = tmp; | |
1212 | if (stat) | |
1213 | return (1); | |
1214 | } | |
1215 | } else if (!strcmp(p, "else")) { | |
1216 | cmd->type = CL_END; | |
1217 | return (1); | |
1218 | } else if (!strcmp(p, "end")) { | |
1219 | cmd->type = CL_END; | |
1220 | return (0); | |
1221 | } else if (!strcmp(p, "exitloop")) { | |
1222 | cmd->type = CL_EXITLOOP; | |
1223 | } else { | |
1224 | cmd->type = CL_NORMAL; | |
1225 | } | |
1226 | cmd->next = (struct command_line *)xmalloc(sizeof(*cmd)); | |
1227 | cmd = cmd->next; | |
1228 | bzero(cmd, sizeof(*cmd)); | |
1229 | } | |
1230 | /* NOTREACHED */ | |
1231 | } | |
1232 | ||
1233 | int | |
1234 | execute_control_structure(cmd) | |
1235 | register struct command_line *cmd; | |
1236 | { | |
1237 | char expn[1024]; | |
1238 | struct expression *cond; | |
1239 | int stat; | |
1240 | ||
1241 | while (cmd) { | |
1242 | QUIT; | |
1243 | switch (cmd->type) { | |
1244 | case CL_END: | |
1245 | return (0); | |
1246 | case CL_NORMAL: | |
1247 | expand_and_execute(cmd->line, 0); | |
1248 | break; | |
1249 | case CL_WHILE: | |
1250 | expand_args(cmd->line + 6, expn); | |
1251 | cond = parse_c_expression(expn); | |
1252 | while (breakpoint_cond_eval(cond) == 0) | |
1253 | if (execute_control_structure(cmd->body)) | |
1254 | break; | |
1255 | free(cond); | |
1256 | break; | |
1257 | case CL_IF: | |
1258 | expand_args(cmd->line + 3, expn); | |
1259 | cond = parse_c_expression(expn); | |
1260 | stat = breakpoint_cond_eval(cond); | |
1261 | free(cond); | |
1262 | if (stat == 0) { | |
1263 | if (execute_control_structure(cmd->body)) | |
1264 | return (1); | |
1265 | } else if (cmd->elsebody) { | |
1266 | if (execute_control_structure(cmd->elsebody)) | |
1267 | return (1); | |
1268 | } | |
1269 | break; | |
1270 | case CL_EXITLOOP: | |
1271 | return (1); | |
1272 | } | |
1273 | cmd = cmd->next; | |
1274 | } | |
1275 | free_all_values(); | |
1276 | } | |
1277 | ||
1278 | execute_command_lines(cmd) | |
1279 | struct command_line *cmd; | |
1280 | { | |
1281 | struct cleanup *old_chain = make_cleanup(source_cleanup, instream); | |
1282 | ||
1283 | /* | |
1284 | * Set the instream to 0, indicating execution of a user-defined | |
1285 | * function. | |
1286 | */ | |
1287 | ++immediate_quit; | |
1288 | instream = (FILE *) 0; | |
1289 | (void)execute_control_structure(cmd); | |
1290 | --immediate_quit; | |
1291 | do_cleanups(old_chain); | |
1292 | } | |
1293 | ||
1294 | /* do following command lines if expression true */ | |
1295 | if_command(p, from_tty) | |
1296 | char *p; | |
1297 | int from_tty; | |
1298 | { | |
1299 | struct cleanup *old_chain; | |
1300 | struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); | |
1301 | char buf[128]; | |
1302 | ||
1303 | sprintf(buf, "if %s", p); | |
1304 | ||
1305 | bzero(cmd, sizeof(*cmd)); | |
1306 | old_chain = make_cleanup(free_command_lines, cmd); | |
1307 | cmd->type = CL_IF; | |
1308 | cmd->line = savestring(buf, strlen(buf)); | |
1309 | /* XXX cmd->line? */ | |
1310 | if (parse_control_structure(cmd, from_tty, 0)) { | |
1311 | struct command_line *tmp; | |
1312 | ||
1313 | cmd->elsebody = cmd->body; | |
1314 | (void) parse_control_structure(cmd, from_tty, 0); | |
1315 | tmp = cmd->elsebody; | |
1316 | cmd->elsebody = cmd->body; | |
1317 | cmd->body = tmp; | |
1318 | } | |
1319 | (void) execute_command_lines(cmd); | |
1320 | do_cleanups(old_chain); | |
1321 | } | |
1322 | ||
1323 | /* do following command lines while expression true */ | |
1324 | while_command(p, from_tty) | |
1325 | char *p; | |
1326 | int from_tty; | |
1327 | { | |
1328 | struct cleanup *old_chain; | |
1329 | struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); | |
1330 | char buf[128]; | |
1331 | ||
1332 | sprintf(buf, "while %s", p); | |
1333 | ||
1334 | bzero(cmd, sizeof(*cmd)); | |
1335 | old_chain = make_cleanup(free_command_lines, cmd); | |
1336 | cmd->type = CL_WHILE; | |
1337 | cmd->line = savestring(buf, strlen(buf)); | |
1338 | (void)parse_control_structure(cmd, from_tty, 0); | |
1339 | (void)execute_command_lines(cmd); | |
1340 | do_cleanups(old_chain); | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * Execute the line P as a command. | |
1345 | * Pass FROM_TTY as second argument to the defining function. | |
1346 | */ | |
1347 | void | |
1348 | execute_command (p, from_tty) | |
1349 | char *p; | |
1350 | int from_tty; | |
1351 | { | |
1352 | register struct cmd_list_element *c; | |
1353 | register struct command_line *cmdlines; | |
1354 | ||
1355 | free_all_values(); | |
1356 | if (*p) { | |
1357 | c = lookup_cmd(&p, cmdlist, "", 0, 1); | |
1358 | if (c->function == 0) | |
1359 | error("That is not a command, just a help topic."); | |
1360 | else if (c->class == (int) class_user) { | |
1361 | struct cleanup *old_chain = setup_user_args(p); | |
1362 | ||
1363 | cmdlines = (struct command_line *) c->function; | |
1364 | if (cmdlines) | |
1365 | (void)execute_command_lines(cmdlines); | |
1366 | ||
1367 | do_cleanups(old_chain); | |
1368 | } else | |
1369 | /* Pass null arg rather than an empty one. */ | |
1370 | (*c->function) (*p ? p : 0, from_tty); | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * Read lines from the input stream and accumulate them in a chain of struct | |
1376 | * command_line's which is then returned. | |
1377 | */ | |
1378 | struct command_line * | |
1379 | read_command_lines(from_tty) | |
1380 | int from_tty; | |
1381 | { | |
1382 | struct cleanup *old_chain; | |
1383 | struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); | |
1384 | struct command_line *next; | |
1385 | ||
1386 | bzero(cmd, sizeof(*cmd)); | |
1387 | old_chain = make_cleanup(free_command_lines, cmd); | |
1388 | cmd->type = CL_NOP; | |
1389 | (void)parse_control_structure(cmd, from_tty, 0); | |
1390 | dont_repeat(); | |
1391 | discard_cleanups(old_chain); | |
1392 | next = cmd->body; | |
1393 | free(cmd); | |
1394 | return (next); | |
1395 | } | |
1396 | ||
1397 | /* Free a chain of struct command_line's. */ | |
1398 | ||
1399 | void | |
1400 | free_command_lines(cmds) | |
1401 | struct command_line *cmds; | |
1402 | { | |
1403 | struct command_line *next; | |
1404 | ||
1405 | while (cmds) { | |
1406 | if (cmds->body) | |
1407 | free(cmds->body); | |
1408 | if (cmds->elsebody) | |
1409 | free(cmds->elsebody); | |
1410 | if (cmds->line) | |
1411 | free(cmds->line); | |
1412 | next = cmds->next; | |
1413 | free(cmds); | |
1414 | cmds = next; | |
1415 | } | |
1416 | } | |
1417 | \f | |
1418 | /* Add an element to the list of info subcommands. */ | |
1419 | ||
1420 | void | |
1421 | add_info (name, fun, doc) | |
1422 | char *name; | |
1423 | void (*fun) (); | |
1424 | char *doc; | |
1425 | { | |
1426 | add_cmd (name, no_class, fun, doc, &infolist); | |
1427 | } | |
1428 | ||
1429 | /* Add an alias to the list of info subcommands. */ | |
1430 | ||
1431 | void | |
1432 | add_info_alias (name, oldname, abbrev_flag) | |
1433 | char *name; | |
1434 | char *oldname; | |
1435 | int abbrev_flag; | |
1436 | { | |
1437 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); | |
1438 | } | |
1439 | ||
1440 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
1441 | Therefore, its own definition is called only for "info" with no args. */ | |
1442 | ||
1443 | static void | |
1444 | info_command () | |
1445 | { | |
1446 | printf ("\"info\" must be followed by the name of an info command.\n"); | |
1447 | help_list (infolist, "info ", -1, stdout); | |
1448 | } | |
1449 | \f | |
1450 | /* Add an element to the list of commands. */ | |
1451 | ||
1452 | void | |
1453 | add_com (name, class, fun, doc) | |
1454 | char *name; | |
1455 | int class; | |
1456 | void (*fun) (); | |
1457 | char *doc; | |
1458 | { | |
1459 | add_cmd (name, class, fun, doc, &cmdlist); | |
1460 | } | |
1461 | ||
1462 | /* Add an alias or abbreviation command to the list of commands. */ | |
1463 | ||
1464 | void | |
1465 | add_com_alias (name, oldname, class, abbrev_flag) | |
1466 | char *name; | |
1467 | char *oldname; | |
1468 | int class; | |
1469 | int abbrev_flag; | |
1470 | { | |
1471 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); | |
1472 | } | |
1473 | ||
1474 | void | |
1475 | error_no_arg (why) | |
1476 | char *why; | |
1477 | { | |
1478 | error ("Argument required (%s).", why); | |
1479 | } | |
1480 | ||
1481 | static void | |
1482 | help_command (command, from_tty) | |
1483 | char *command; | |
1484 | int from_tty; /* Ignored */ | |
1485 | { | |
1486 | help_cmd (command, stdout); | |
1487 | } | |
1488 | \f | |
1489 | static void | |
1490 | validate_comname (comname) | |
1491 | char *comname; | |
1492 | { | |
1493 | register char *p; | |
1494 | ||
1495 | if (comname == 0) | |
1496 | error_no_arg ("name of command to define"); | |
1497 | ||
1498 | p = comname; | |
1499 | while (*p) | |
1500 | { | |
1501 | if (!(*p >= 'A' && *p <= 'Z') | |
1502 | && !(*p >= 'a' && *p <= 'z') | |
1503 | && !(*p >= '0' && *p <= '9') | |
1504 | && *p != '-') | |
1505 | error ("Junk in argument list: \"%s\"", p); | |
1506 | p++; | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | static void | |
1511 | define_command (comname, from_tty) | |
1512 | char *comname; | |
1513 | int from_tty; | |
1514 | { | |
1515 | register struct command_line *cmds; | |
1516 | register struct cmd_list_element *c; | |
1517 | char *tem = comname; | |
1518 | ||
1519 | validate_comname (comname); | |
1520 | ||
1521 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
1522 | if (c) | |
1523 | { | |
1524 | if (c->class == (int) class_user || c->class == (int) class_alias) | |
1525 | tem = "Redefine command \"%s\"? "; | |
1526 | else | |
1527 | tem = "Really redefine built-in command \"%s\"? "; | |
1528 | if (!query (tem, comname)) | |
1529 | error ("Command \"%s\" not redefined.", comname); | |
1530 | } | |
1531 | ||
1532 | if (from_tty) | |
1533 | { | |
1534 | printf ("Type commands for definition of \"%s\".\n\ | |
1535 | End with a line saying just \"end\".\n", comname); | |
1536 | fflush (stdout); | |
1537 | } | |
1538 | comname = savestring (comname, strlen (comname)); | |
1539 | ||
1540 | cmds = read_command_lines (from_tty); | |
1541 | ||
1542 | if (c && c->class == (int) class_user) | |
1543 | free_command_lines (c->function); | |
1544 | ||
1545 | add_com (comname, class_user, cmds, | |
1546 | (c && c->class == (int) class_user) | |
1547 | ? c->doc : savestring ("User-defined.", 13)); | |
1548 | } | |
1549 | ||
1550 | static void | |
1551 | document_command (comname, from_tty) | |
1552 | char *comname; | |
1553 | int from_tty; | |
1554 | { | |
1555 | register struct cmd_list_element *c; | |
1556 | register char *p; | |
1557 | register char *cp; | |
1558 | register char *doc = 0; | |
1559 | register int len; | |
1560 | char *tmp = comname; | |
1561 | ||
1562 | validate_comname (comname); | |
1563 | c = lookup_cmd (&tmp, cmdlist, "", 0, 1); | |
1564 | if (c->class != (int) class_user) | |
1565 | error ("Command \"%s\" is built-in.", comname); | |
1566 | ||
1567 | if (from_tty) | |
1568 | printf ("Type documentation for \"%s\". \ | |
1569 | End with a line saying just \"end\".\n", comname); | |
1570 | ||
1571 | while (p = read_one_command_line(from_tty? "> " : 0, from_tty)) | |
1572 | { | |
1573 | if (strcmp(p, "end") == 0) | |
1574 | break; | |
1575 | len = strlen(p) + 1; | |
1576 | if (! doc) | |
1577 | { | |
1578 | doc = xmalloc(len); | |
1579 | cp = doc; | |
1580 | } | |
1581 | else | |
1582 | { | |
1583 | int i = cp - doc; | |
1584 | doc = xrealloc(doc, i + len); | |
1585 | cp = doc + i; | |
1586 | } | |
1587 | strcpy(cp, p); | |
1588 | cp += len; | |
1589 | cp[-1] = '\n'; | |
1590 | } | |
1591 | if (doc && cp > doc) | |
1592 | cp[-1] = 0; | |
1593 | if (c->doc) | |
1594 | free (c->doc); | |
1595 | c->doc = doc; | |
1596 | } | |
1597 | \f | |
1598 | static void | |
1599 | print_gdb_version () | |
1600 | { | |
1601 | printf ("GDB %s, Copyright (C) 1989 Free Software Foundation, Inc.\n\ | |
1602 | There is ABSOLUTELY NO WARRANTY for GDB; type \"info warranty\" for details.\n\ | |
1603 | GDB is free software and you are welcome to distribute copies of it\n\ | |
1604 | under certain conditions; type \"info copying\" to see the conditions.\n", | |
1605 | version); | |
1606 | } | |
1607 | ||
1608 | static void | |
1609 | version_info () | |
1610 | { | |
1611 | immediate_quit++; | |
1612 | print_gdb_version (); | |
1613 | immediate_quit--; | |
1614 | } | |
1615 | \f | |
1616 | ||
1617 | /* Command to specify a prompt string instead of "(gdb) ". */ | |
1618 | ||
1619 | void | |
1620 | set_prompt_command (text) | |
1621 | char *text; | |
1622 | { | |
1623 | char *p, *q; | |
1624 | register int c; | |
1625 | char *new; | |
1626 | ||
1627 | if (text == 0) | |
1628 | error_no_arg ("string to which to set prompt"); | |
1629 | ||
1630 | new = (char *) xmalloc (strlen (text) + 2); | |
1631 | p = text; q = new; | |
1632 | while (c = *p++) | |
1633 | { | |
1634 | if (c == '\\') | |
1635 | { | |
1636 | /* \ at end of argument is used after spaces | |
1637 | so they won't be lost. */ | |
1638 | if (*p == 0) | |
1639 | break; | |
1640 | c = parse_escape (&p); | |
1641 | if (c == 0) | |
1642 | break; /* C loses */ | |
1643 | else if (c > 0) | |
1644 | *q++ = c; | |
1645 | } | |
1646 | else | |
1647 | *q++ = c; | |
1648 | } | |
1649 | if (*(p - 1) != '\\') | |
1650 | *q++ = ' '; | |
1651 | *q++ = '\0'; | |
1652 | new = (char *) xrealloc (new, q - new); | |
1653 | free (prompt); | |
1654 | prompt = new; | |
1655 | } | |
1656 | \f | |
1657 | static void | |
1658 | quit_command () | |
1659 | { | |
1660 | if (have_inferior_p ()) | |
1661 | { | |
1662 | if (inhibit_confirm || query ("The program is running. Quit anyway? ")) | |
1663 | { | |
1664 | /* Prevent any warning message from reopen_exec_file, in case | |
1665 | we have a core file that's inconsistent with the exec file. */ | |
1666 | exec_file_command (0, 0); | |
1667 | kill_inferior (); | |
1668 | } | |
1669 | else | |
1670 | error ("Not confirmed."); | |
1671 | } | |
1672 | /* Save the history information if it is appropriate to do so. */ | |
1673 | if (write_history_p && history_filename) | |
1674 | write_history (history_filename); | |
1675 | exit (0); | |
1676 | } | |
1677 | ||
1678 | int | |
1679 | input_from_terminal_p () | |
1680 | { | |
1681 | return instream == stdin; | |
1682 | } | |
1683 | \f | |
1684 | static void | |
1685 | pwd_command (arg, from_tty) | |
1686 | char *arg; | |
1687 | int from_tty; | |
1688 | { | |
1689 | if (arg) error ("The \"pwd\" command does not take an argument: %s", arg); | |
1690 | getwd (dirbuf); | |
1691 | ||
1692 | if (strcmp (dirbuf, current_directory)) | |
1693 | printf ("Working directory %s\n (canonically %s).\n", | |
1694 | current_directory, dirbuf); | |
1695 | else | |
1696 | printf ("Working directory %s.\n", current_directory); | |
1697 | } | |
1698 | ||
1699 | static void | |
1700 | cd_command (dir, from_tty) | |
1701 | char *dir; | |
1702 | int from_tty; | |
1703 | { | |
1704 | int len; | |
1705 | int change; | |
1706 | ||
1707 | if (dir == 0) | |
1708 | error_no_arg ("new working directory"); | |
1709 | ||
1710 | dir = tilde_expand (dir); | |
1711 | make_cleanup (free, dir); | |
1712 | ||
1713 | len = strlen (dir); | |
1714 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); | |
1715 | if (dir[0] == '/') | |
1716 | current_directory = dir; | |
1717 | else | |
1718 | { | |
1719 | current_directory = concat (current_directory, "/", dir); | |
1720 | free (dir); | |
1721 | } | |
1722 | ||
1723 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
1724 | ||
1725 | change = 1; | |
1726 | while (change) | |
1727 | { | |
1728 | char *p; | |
1729 | change = 0; | |
1730 | ||
1731 | for (p = current_directory; *p;) | |
1732 | { | |
1733 | if (!strncmp (p, "/./", 2) | |
1734 | && (p[2] == 0 || p[2] == '/')) | |
1735 | strcpy (p, p + 2); | |
1736 | else if (!strncmp (p, "/..", 3) | |
1737 | && (p[3] == 0 || p[3] == '/') | |
1738 | && p != current_directory) | |
1739 | { | |
1740 | char *q = p; | |
1741 | while (q != current_directory && q[-1] != '/') q--; | |
1742 | if (q != current_directory) | |
1743 | { | |
1744 | strcpy (q-1, p+3); | |
1745 | p = q-1; | |
1746 | } | |
1747 | } | |
1748 | else p++; | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | if (chdir (dir) < 0) | |
1753 | perror_with_name (dir); | |
1754 | ||
1755 | if (from_tty) | |
1756 | pwd_command ((char *) 0, 1); | |
1757 | } | |
1758 | \f | |
1759 | static void | |
1760 | source_command (arg, from_tty) | |
1761 | char *arg; | |
1762 | int from_tty; | |
1763 | { | |
1764 | FILE *stream; | |
1765 | struct cleanup *cleanups; | |
1766 | char *file = arg; | |
1767 | char *path; | |
1768 | ||
1769 | if (file == 0) | |
1770 | /* Let source without arguments read .gdbinit. */ | |
1771 | file = ".gdbinit"; | |
1772 | ||
1773 | file = tilde_expand (file); | |
1774 | make_cleanup (free, file); | |
1775 | ||
1776 | #ifdef KERNELDEBUG | |
1777 | if (path = getenv(kernel_debugging? "KGDBPATH" : "GDBPATH")) | |
1778 | #else | |
1779 | if (path = getenv("GDBPATH")) | |
1780 | #endif | |
1781 | { | |
1782 | int fd = openp(path, 1, file, O_RDONLY, 0, 0); | |
1783 | ||
1784 | if (fd == -1) | |
1785 | stream = 0; | |
1786 | else | |
1787 | stream = fdopen(fd, "r"); | |
1788 | } | |
1789 | else | |
1790 | stream = fopen (file, "r"); | |
1791 | ||
1792 | if (stream == 0) | |
1793 | perror_with_name (file); | |
1794 | ||
1795 | cleanups = make_cleanup (source_cleanup, instream); | |
1796 | ||
1797 | instream = stream; | |
1798 | ||
1799 | command_loop (); | |
1800 | ||
1801 | do_cleanups (cleanups); | |
1802 | } | |
1803 | ||
1804 | static void | |
1805 | echo_command (text) | |
1806 | char *text; | |
1807 | { | |
1808 | char *p = text; | |
1809 | register int c; | |
1810 | ||
1811 | if (text) | |
1812 | while (c = *p++) | |
1813 | { | |
1814 | if (c == '\\') | |
1815 | { | |
1816 | /* \ at end of argument is used after spaces | |
1817 | so they won't be lost. */ | |
1818 | if (*p == 0) | |
1819 | return; | |
1820 | ||
1821 | c = parse_escape (&p); | |
1822 | if (c >= 0) | |
1823 | fputc (c, stdout); | |
1824 | } | |
1825 | else | |
1826 | fputc (c, stdout); | |
1827 | } | |
1828 | fflush(stdout); | |
1829 | } | |
1830 | ||
1831 | static void | |
1832 | dump_me_command () | |
1833 | { | |
1834 | if (query ("Should GDB dump core? ")) | |
1835 | { | |
1836 | signal (SIGQUIT, SIG_DFL); | |
1837 | kill (getpid (), SIGQUIT); | |
1838 | } | |
1839 | } | |
1840 | \f | |
1841 | int | |
1842 | parse_binary_operation (caller, arg) | |
1843 | char *caller, *arg; | |
1844 | { | |
1845 | int length; | |
1846 | ||
1847 | if (!arg || !*arg) | |
1848 | return 1; | |
1849 | ||
1850 | length = strlen (arg); | |
1851 | ||
1852 | while (arg[length - 1] == ' ' || arg[length - 1] == '\t') | |
1853 | length--; | |
1854 | ||
1855 | if (!strncmp (arg, "on", length) | |
1856 | || !strncmp (arg, "1", length) | |
1857 | || !strncmp (arg, "yes", length)) | |
1858 | return 1; | |
1859 | else | |
1860 | if (!strncmp (arg, "off", length) | |
1861 | || !strncmp (arg, "0", length) | |
1862 | || !strncmp (arg, "no", length)) | |
1863 | return 0; | |
1864 | else | |
1865 | error ("\"%s\" not given a binary valued argument.", caller); | |
1866 | } | |
1867 | ||
1868 | /* Functions to manipulate command line editing control variables. */ | |
1869 | ||
1870 | static void | |
1871 | set_editing (arg, from_tty) | |
1872 | char *arg; | |
1873 | int from_tty; | |
1874 | { | |
1875 | command_editing_p = parse_binary_operation ("set command-editing", arg); | |
1876 | } | |
1877 | ||
1878 | /* Number of commands to print in each call to editing_info. */ | |
1879 | #define Hist_print 10 | |
1880 | static void | |
1881 | editing_info (arg, from_tty) | |
1882 | char *arg; | |
1883 | int from_tty; | |
1884 | { | |
1885 | /* Index for history commands. Relative to history_base. */ | |
1886 | int offset; | |
1887 | ||
1888 | /* Number of the history entry which we are planning to display next. | |
1889 | Relative to history_base. */ | |
1890 | static int num = 0; | |
1891 | ||
1892 | /* The first command in the history which doesn't exist (i.e. one more | |
1893 | than the number of the last command). Relative to history_base. */ | |
1894 | int hist_len; | |
1895 | ||
1896 | struct _hist_entry { | |
1897 | char *line; | |
1898 | char *data; | |
1899 | } *history_get(); | |
1900 | extern int history_base; | |
1901 | ||
1902 | printf_filtered ("Interactive command editing is %s.\n", | |
1903 | command_editing_p ? "on" : "off"); | |
1904 | ||
1905 | printf_filtered ("History expansion of command input is %s.\n", | |
1906 | history_expansion_p ? "on" : "off"); | |
1907 | printf_filtered ("Writing of a history record upon exit is %s.\n", | |
1908 | write_history_p ? "enabled" : "disabled"); | |
1909 | printf_filtered ("The size of the history list (number of stored commands) is %d.\n", | |
1910 | history_size); | |
1911 | printf_filtered ("The name of the history record is \"%s\".\n\n", | |
1912 | history_filename ? history_filename : ""); | |
1913 | ||
1914 | /* Print out some of the commands from the command history. */ | |
1915 | /* First determine the length of the history list. */ | |
1916 | hist_len = history_size; | |
1917 | for (offset = 0; offset < history_size; offset++) | |
1918 | { | |
1919 | if (!history_get (history_base + offset)) | |
1920 | { | |
1921 | hist_len = offset; | |
1922 | break; | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | if (arg) | |
1927 | { | |
1928 | if (arg[0] == '+' && arg[1] == '\0') | |
1929 | /* "info editing +" should print from the stored position. */ | |
1930 | ; | |
1931 | else | |
1932 | /* "info editing <exp>" should print around command number <exp>. */ | |
1933 | num = (parse_and_eval_address (arg) - history_base) - Hist_print / 2; | |
1934 | } | |
1935 | /* "info editing" means print the last Hist_print commands. */ | |
1936 | else | |
1937 | { | |
1938 | num = hist_len - Hist_print; | |
1939 | } | |
1940 | ||
1941 | if (num < 0) | |
1942 | num = 0; | |
1943 | ||
1944 | /* If there are at least Hist_print commands, we want to display the last | |
1945 | Hist_print rather than, say, the last 6. */ | |
1946 | if (hist_len - num < Hist_print) | |
1947 | { | |
1948 | num = hist_len - Hist_print; | |
1949 | if (num < 0) | |
1950 | num = 0; | |
1951 | } | |
1952 | ||
1953 | if (num == hist_len - Hist_print) | |
1954 | printf_filtered ("The list of the last %d commands is:\n\n", Hist_print); | |
1955 | else | |
1956 | printf_filtered ("Some of the stored commands are:\n\n"); | |
1957 | ||
1958 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
1959 | { | |
1960 | printf_filtered ("%5d %s\n", history_base + offset, | |
1961 | (history_get (history_base + offset))->line); | |
1962 | } | |
1963 | ||
1964 | /* The next command we want to display is the next one that we haven't | |
1965 | displayed yet. */ | |
1966 | num += Hist_print; | |
1967 | ||
1968 | /* If the user repeats this command with return, it should do what | |
1969 | "info editing +" does. This is unnecessary if arg is null, | |
1970 | because "info editing +" is not useful after "info editing". */ | |
1971 | if (from_tty && arg) | |
1972 | { | |
1973 | arg[0] = '+'; | |
1974 | arg[1] = '\0'; | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | static void | |
1979 | set_history_expansion (arg, from_tty) | |
1980 | char *arg; | |
1981 | int from_tty; | |
1982 | { | |
1983 | history_expansion_p = parse_binary_operation ("set history expansion", arg); | |
1984 | } | |
1985 | ||
1986 | static void | |
1987 | set_history_write (arg, from_tty) | |
1988 | char *arg; | |
1989 | int from_tty; | |
1990 | { | |
1991 | write_history_p = parse_binary_operation ("set history write", arg); | |
1992 | } | |
1993 | ||
1994 | static void | |
1995 | set_history (arg, from_tty) | |
1996 | char *arg; | |
1997 | int from_tty; | |
1998 | { | |
1999 | printf ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
2000 | help_list (sethistlist, "set history ", -1, stdout); | |
2001 | } | |
2002 | ||
2003 | static void | |
2004 | set_history_size (arg, from_tty) | |
2005 | char *arg; | |
2006 | int from_tty; | |
2007 | { | |
2008 | if (!*arg) | |
2009 | error_no_arg ("set history size"); | |
2010 | ||
2011 | history_size = atoi (arg); | |
2012 | } | |
2013 | ||
2014 | static void | |
2015 | set_history_filename (arg, from_tty) | |
2016 | char *arg; | |
2017 | int from_tty; | |
2018 | { | |
2019 | int i; | |
2020 | ||
2021 | if (!arg) | |
2022 | error_no_arg ("history file name"); | |
2023 | ||
2024 | arg = tilde_expand (arg); | |
2025 | make_cleanup (free, arg); | |
2026 | ||
2027 | i = strlen (arg) - 1; | |
2028 | ||
2029 | free (history_filename); | |
2030 | ||
2031 | while (i > 0 && (arg[i] == ' ' || arg[i] == '\t')) | |
2032 | i--; | |
2033 | ++i; | |
2034 | ||
2035 | if (!*arg) | |
2036 | history_filename = (char *) 0; | |
2037 | else | |
2038 | history_filename = savestring (arg, i + 1); | |
2039 | history_filename[i] = '\0'; | |
2040 | } | |
2041 | ||
2042 | int info_verbose; | |
2043 | ||
2044 | static void | |
2045 | set_verbose_command (arg, from_tty) | |
2046 | char *arg; | |
2047 | int from_tty; | |
2048 | { | |
2049 | info_verbose = parse_binary_operation ("set verbose", arg); | |
2050 | } | |
2051 | ||
2052 | static void | |
2053 | verbose_info (arg, from_tty) | |
2054 | char *arg; | |
2055 | int from_tty; | |
2056 | { | |
2057 | if (arg) | |
2058 | error ("\"info verbose\" does not take any arguments.\n"); | |
2059 | ||
2060 | printf ("Verbose printing of information is %s.\n", | |
2061 | info_verbose ? "on" : "off"); | |
2062 | } | |
2063 | ||
2064 | static void | |
2065 | float_handler () | |
2066 | { | |
2067 | error ("Invalid floating value encountered or computed."); | |
2068 | } | |
2069 | ||
2070 | \f | |
2071 | static void | |
2072 | initialize_cmd_lists () | |
2073 | { | |
2074 | cmdlist = (struct cmd_list_element *) 0; | |
2075 | infolist = (struct cmd_list_element *) 0; | |
2076 | enablelist = (struct cmd_list_element *) 0; | |
2077 | disablelist = (struct cmd_list_element *) 0; | |
2078 | deletelist = (struct cmd_list_element *) 0; | |
2079 | enablebreaklist = (struct cmd_list_element *) 0; | |
2080 | setlist = (struct cmd_list_element *) 0; | |
2081 | sethistlist = (struct cmd_list_element *) 0; | |
2082 | unsethistlist = (struct cmd_list_element *) 0; | |
2083 | } | |
2084 | ||
2085 | static void | |
2086 | initialize_main () | |
2087 | { | |
2088 | char *tmpenv; | |
2089 | /* Command line editing externals. */ | |
2090 | extern int (*rl_completion_entry_function)(); | |
2091 | extern char *rl_completer_word_break_characters; | |
2092 | extern char *rl_readline_name; | |
2093 | ||
2094 | /* Set default verbose mode on. */ | |
2095 | info_verbose = 1; | |
2096 | ||
2097 | #ifdef KERNELDEBUG | |
2098 | if (kernel_debugging) | |
2099 | prompt = savestring ("(kgdb) ", 7); | |
2100 | else | |
2101 | #endif | |
2102 | prompt = savestring ("(gdb) ", 6); | |
2103 | ||
2104 | /* Set the important stuff up for command editing. */ | |
2105 | command_editing_p = 1; | |
2106 | history_expansion_p = 0; | |
2107 | write_history_p = 0; | |
2108 | ||
2109 | if (tmpenv = getenv ("HISTSIZE")) | |
2110 | history_size = atoi (tmpenv); | |
2111 | else | |
2112 | history_size = 256; | |
2113 | ||
2114 | stifle_history (history_size); | |
2115 | ||
2116 | if (tmpenv = getenv ("GDBHISTFILE")) | |
2117 | history_filename = savestring (tmpenv, strlen(tmpenv)); | |
2118 | else | |
2119 | /* We include the current directory so that if the user changes | |
2120 | directories the file written will be the same as the one | |
2121 | that was read. */ | |
2122 | history_filename = concat (current_directory, "/.gdb_history", ""); | |
2123 | ||
2124 | read_history (history_filename); | |
2125 | ||
2126 | /* Setup important stuff for command line editing. */ | |
2127 | rl_completion_entry_function = (int (*)()) symbol_completion_function; | |
2128 | rl_completer_word_break_characters = gdb_completer_word_break_characters; | |
2129 | rl_readline_name = "gdb"; | |
2130 | ||
2131 | /* Define the classes of commands. | |
2132 | They will appear in the help list in the reverse of this order. */ | |
2133 | ||
2134 | add_cmd ("obscure", class_obscure, 0, "Obscure features.", &cmdlist); | |
2135 | add_cmd ("alias", class_alias, 0, "Aliases of other commands.", &cmdlist); | |
2136 | add_cmd ("user", class_user, 0, "User-defined commands.\n\ | |
2137 | The commands in this class are those defined by the user.\n\ | |
2138 | Use the \"define\" command to define a command.", &cmdlist); | |
2139 | add_cmd ("support", class_support, 0, "Support facilities.", &cmdlist); | |
2140 | add_cmd ("status", class_info, 0, "Status inquiries.", &cmdlist); | |
2141 | add_cmd ("files", class_files, 0, "Specifying and examining files.", &cmdlist); | |
2142 | add_cmd ("breakpoints", class_breakpoint, 0, "Making program stop at certain points.", &cmdlist); | |
2143 | add_cmd ("data", class_vars, 0, "Examining data.", &cmdlist); | |
2144 | add_cmd ("stack", class_stack, 0, "Examining the stack.\n\ | |
2145 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
2146 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
2147 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
2148 | Variable lookups are done with respect to the selected frame.\n\ | |
2149 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
2150 | The commands below can be used to select other frames by number or address.", | |
2151 | &cmdlist); | |
2152 | add_cmd ("running", class_run, 0, "Running the program.", &cmdlist); | |
2153 | ||
2154 | add_com ("pwd", class_files, pwd_command, | |
2155 | "Print working directory. This is used for your program as well."); | |
2156 | add_com ("cd", class_files, cd_command, | |
2157 | "Set working directory to DIR for debugger and program being debugged.\n\ | |
2158 | The change does not take effect for the program being debugged\n\ | |
2159 | until the next time it is started."); | |
2160 | ||
2161 | add_cmd ("prompt", class_support, set_prompt_command, | |
2162 | "Change gdb's prompt from the default of \"(gdb)\"", | |
2163 | &setlist); | |
2164 | add_com ("echo", class_support, echo_command, | |
2165 | "Print a constant string. Give string as argument.\n\ | |
2166 | C escape sequences may be used in the argument.\n\ | |
2167 | No newline is added at the end of the argument;\n\ | |
2168 | use \"\\n\" if you want a newline to be printed.\n\ | |
2169 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
2170 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
2171 | to be printed or after trailing whitespace."); | |
2172 | add_com ("document", class_support, document_command, | |
2173 | "Document a user-defined command.\n\ | |
2174 | Give command name as argument. Give documentation on following lines.\n\ | |
2175 | End with a line of just \"end\"."); | |
2176 | add_com ("define", class_support, define_command, | |
2177 | "Define a new command name. Command name is argument.\n\ | |
2178 | Definition appears on following lines, one command per line.\n\ | |
2179 | End with a line of just \"end\".\n\ | |
2180 | Use the \"document\" command to give documentation for the new command.\n\ | |
2181 | Commands defined in this way do not take arguments."); | |
2182 | ||
2183 | add_com ("source", class_support, source_command, | |
2184 | "Read commands from a file named FILE.\n\ | |
2185 | Note that the file \".gdbinit\" is read automatically in this way\n\ | |
2186 | when gdb is started."); | |
2187 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
2188 | add_com ("help", class_support, help_command, "Print list of commands."); | |
2189 | add_com_alias ("q", "quit", class_support, 1); | |
2190 | add_com_alias ("h", "help", class_support, 1); | |
2191 | add_com ("while", class_support, while_command, | |
2192 | "execute following commands while condition is true.\n\ | |
2193 | Expression for condition follows \"while\" keyword."); | |
2194 | add_com ("if", class_support, if_command, | |
2195 | "execute following commands if condition is true.\n\ | |
2196 | Expression for condition follows \"if\" keyword."); | |
2197 | add_cmd ("verbose", class_support, set_verbose_command, | |
2198 | "Change the number of informational messages gdb prints.", | |
2199 | &setlist); | |
2200 | add_info ("verbose", verbose_info, | |
2201 | "Status of gdb's verbose printing option.\n"); | |
2202 | ||
2203 | add_com ("dump-me", class_obscure, dump_me_command, | |
2204 | "Get fatal error; make debugger dump its core."); | |
2205 | ||
2206 | add_cmd ("editing", class_support, set_editing, | |
2207 | "Enable or disable command line editing.\n\ | |
2208 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ | |
2209 | Without an argument, command line editing is enabled.", &setlist); | |
2210 | ||
2211 | add_prefix_cmd ("history", class_support, set_history, | |
2212 | "Generic command for setting command history parameters.", | |
2213 | &sethistlist, "set history ", 0, &setlist); | |
2214 | ||
2215 | add_cmd ("expansion", no_class, set_history_expansion, | |
2216 | "Enable or disable history expansion on command input.\n\ | |
2217 | Without an argument, history expansion is enabled.", &sethistlist); | |
2218 | ||
2219 | add_cmd ("write", no_class, set_history_write, | |
2220 | "Enable or disable saving of the history record on exit.\n\ | |
2221 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ | |
2222 | Without an argument, saving is enabled.", &sethistlist); | |
2223 | ||
2224 | add_cmd ("size", no_class, set_history_size, | |
2225 | "Set the size of the command history, \n\ | |
2226 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
2227 | ||
2228 | add_cmd ("filename", no_class, set_history_filename, | |
2229 | "Set the filename in which to record the command history\n\ | |
2230 | (the list of previous commands of which a record is kept).", &sethistlist); | |
2231 | ||
2232 | add_prefix_cmd ("info", class_info, info_command, | |
2233 | "Generic command for printing status.", | |
2234 | &infolist, "info ", 0, &cmdlist); | |
2235 | add_com_alias ("i", "info", class_info, 1); | |
2236 | ||
2237 | add_info ("editing", editing_info, "Status of command editor."); | |
2238 | ||
2239 | add_info ("version", version_info, "Report what version of GDB this is."); | |
2240 | } |