Commit | Line | Data |
---|---|---|
7d9884b9 | 1 | /* Top level `main' program for GDB, the GNU debugger. |
ee0613d1 | 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
e522fb52 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
e522fb52 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
e522fb52 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
e522fb52 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 | 19 | |
bd5635a1 RP |
20 | #include "defs.h" |
21 | #include "gdbcmd.h" | |
bd5635a1 RP |
22 | #include "symtab.h" |
23 | #include "inferior.h" | |
24 | #include "signals.h" | |
25 | #include "target.h" | |
26 | #include "breakpoint.h" | |
30875e1c SG |
27 | #include "gdbtypes.h" |
28 | #include "expression.h" | |
bd099407 | 29 | #include "language.h" |
bd5635a1 | 30 | |
e522fb52 JG |
31 | #include "getopt.h" |
32 | ||
33 | /* readline include files */ | |
34 | #include "readline.h" | |
35 | #include "history.h" | |
bd5635a1 RP |
36 | |
37 | /* readline defines this. */ | |
38 | #undef savestring | |
39 | ||
40 | #ifdef USG | |
41 | #include <sys/types.h> | |
42 | #include <unistd.h> | |
43 | #endif | |
44 | ||
45 | #include <string.h> | |
ee0613d1 | 46 | #ifndef NO_SYS_FILE |
bd5635a1 | 47 | #include <sys/file.h> |
ee0613d1 | 48 | #endif |
bd5635a1 RP |
49 | #include <setjmp.h> |
50 | #include <sys/param.h> | |
51 | #include <sys/stat.h> | |
e522fb52 | 52 | #include <ctype.h> |
bd5635a1 RP |
53 | |
54 | #ifdef SET_STACK_LIMIT_HUGE | |
55 | #include <sys/time.h> | |
56 | #include <sys/resource.h> | |
bd5635a1 RP |
57 | |
58 | int original_stack_limit; | |
59 | #endif | |
60 | ||
30875e1c SG |
61 | /* Prototypes for local functions */ |
62 | ||
63 | static char * | |
64 | symbol_completion_function PARAMS ((char *, int)); | |
65 | ||
66 | static void | |
67 | command_loop PARAMS ((void)); | |
68 | ||
69 | static void | |
70 | command_loop_marker PARAMS ((int)); | |
71 | ||
72 | static void | |
73 | print_gdb_version PARAMS ((void)); | |
74 | ||
75 | static void | |
76 | quit_command PARAMS ((char *, int)); | |
77 | ||
78 | static void | |
79 | initialize_main PARAMS ((void)); | |
80 | ||
81 | static void | |
82 | initialize_history PARAMS ((void)); | |
83 | ||
84 | static void | |
85 | initialize_cmd_lists PARAMS ((void)); | |
86 | ||
87 | static void | |
88 | float_handler PARAMS ((int)); | |
89 | ||
90 | static void | |
91 | source_command PARAMS ((char *, int)); | |
92 | ||
93 | static void | |
94 | cd_command PARAMS ((char *, int)); | |
95 | ||
96 | static void | |
97 | print_gnu_advertisement PARAMS ((void)); | |
98 | ||
99 | static void | |
100 | init_signals PARAMS ((void)); | |
101 | ||
102 | static void | |
103 | read_command_file PARAMS ((FILE *)); | |
104 | ||
105 | static void | |
106 | set_verbose PARAMS ((char *, int, struct cmd_list_element *)); | |
107 | ||
108 | static void | |
109 | show_history PARAMS ((char *, int)); | |
110 | ||
111 | static void | |
112 | set_history PARAMS ((char *, int)); | |
113 | ||
114 | static void | |
115 | set_history_size_command PARAMS ((char *, int, struct cmd_list_element *)); | |
116 | ||
117 | static void | |
118 | show_commands PARAMS ((char *, int)); | |
119 | ||
120 | static void | |
121 | dump_me_command PARAMS ((char *, int)); | |
122 | ||
123 | static void | |
124 | echo_command PARAMS ((char *, int)); | |
125 | ||
126 | static void | |
127 | pwd_command PARAMS ((char *, int)); | |
128 | ||
129 | static void | |
130 | show_version PARAMS ((char *, int)); | |
131 | ||
132 | static void | |
133 | document_command PARAMS ((char *, int)); | |
134 | ||
135 | static void | |
136 | define_command PARAMS ((char *, int)); | |
137 | ||
138 | static void | |
139 | validate_comname PARAMS ((char *)); | |
140 | ||
141 | static void | |
142 | help_command PARAMS ((char *, int)); | |
143 | ||
144 | static void | |
145 | show_command PARAMS ((char *, int)); | |
146 | ||
147 | static void | |
148 | info_command PARAMS ((char *, int)); | |
149 | ||
150 | static void | |
151 | do_nothing PARAMS ((int)); | |
152 | ||
153 | static void | |
154 | disconnect PARAMS ((int)); | |
155 | ||
156 | static void | |
157 | source_cleanup PARAMS ((FILE *)); | |
bd5635a1 RP |
158 | |
159 | /* If this definition isn't overridden by the header files, assume | |
160 | that isatty and fileno exist on this system. */ | |
161 | #ifndef ISATTY | |
162 | #define ISATTY(FP) (isatty (fileno (FP))) | |
163 | #endif | |
164 | ||
165 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
166 | ||
167 | #ifndef GDBINIT_FILENAME | |
168 | #define GDBINIT_FILENAME ".gdbinit" | |
169 | #endif | |
170 | char gdbinit[] = GDBINIT_FILENAME; | |
171 | ||
f266e564 JK |
172 | #define ALL_CLEANUPS ((struct cleanup *)0) |
173 | ||
bd5635a1 RP |
174 | /* Version number of GDB, as a string. */ |
175 | ||
176 | extern char *version; | |
177 | ||
81066208 JG |
178 | /* Message to be printed before the error message, when an error occurs. */ |
179 | ||
180 | extern char *error_pre_print; | |
181 | ||
318bf84f FF |
182 | /* Message to be printed before the warning message, when a warning occurs. */ |
183 | ||
184 | extern char *warning_pre_print; | |
185 | ||
bd099407 JG |
186 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
187 | ||
ee0613d1 JG |
188 | /* Whether GDB's stdin is on a terminal. */ |
189 | ||
190 | extern int gdb_has_a_terminal; /* inflow.c */ | |
191 | ||
bd5635a1 RP |
192 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
193 | ||
194 | int caution = 1; /* Default is yes, sigh. */ | |
195 | ||
196 | /* | |
197 | * Define all cmd_list_element's | |
198 | */ | |
199 | ||
200 | /* Chain containing all defined commands. */ | |
201 | ||
202 | struct cmd_list_element *cmdlist; | |
203 | ||
204 | /* Chain containing all defined info subcommands. */ | |
205 | ||
206 | struct cmd_list_element *infolist; | |
207 | ||
208 | /* Chain containing all defined enable subcommands. */ | |
209 | ||
210 | struct cmd_list_element *enablelist; | |
211 | ||
212 | /* Chain containing all defined disable subcommands. */ | |
213 | ||
214 | struct cmd_list_element *disablelist; | |
215 | ||
216 | /* Chain containing all defined delete subcommands. */ | |
217 | ||
218 | struct cmd_list_element *deletelist; | |
219 | ||
220 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
221 | ||
222 | struct cmd_list_element *enablebreaklist; | |
223 | ||
224 | /* Chain containing all defined set subcommands */ | |
225 | ||
226 | struct cmd_list_element *setlist; | |
227 | ||
228 | /* Chain containing all defined show subcommands. */ | |
229 | struct cmd_list_element *showlist; | |
230 | ||
231 | /* Chain containing all defined \"set history\". */ | |
232 | ||
233 | struct cmd_list_element *sethistlist; | |
234 | ||
235 | /* Chain containing all defined \"show history\". */ | |
236 | struct cmd_list_element *showhistlist; | |
237 | ||
238 | /* Chain containing all defined \"unset history\". */ | |
239 | ||
240 | struct cmd_list_element *unsethistlist; | |
241 | ||
242 | /* stdio stream that command input is being read from. */ | |
243 | ||
244 | FILE *instream; | |
245 | ||
246 | /* Current working directory. */ | |
247 | ||
248 | char *current_directory; | |
249 | ||
250 | /* The directory name is actually stored here (usually). */ | |
f7402c04 | 251 | static char dirbuf[1024]; |
bd5635a1 RP |
252 | |
253 | /* Function to call before reading a command, if nonzero. | |
254 | The function receives two args: an input stream, | |
255 | and a prompt string. */ | |
bd099407 | 256 | |
30875e1c | 257 | void (*window_hook) PARAMS ((FILE *, char *)); |
bd5635a1 RP |
258 | |
259 | extern int frame_file_full_name; | |
318bf84f FF |
260 | extern int mapped_symbol_files; |
261 | extern int readnow_symbol_files; | |
262 | ||
bd5635a1 RP |
263 | int epoch_interface; |
264 | int xgdb_verbose; | |
265 | ||
bd5635a1 RP |
266 | /* gdb prints this when reading a command interactively */ |
267 | static char *prompt; | |
268 | ||
269 | /* Buffer used for reading command lines, and the size | |
270 | allocated for it so far. */ | |
271 | ||
272 | char *line; | |
273 | int linesize = 100; | |
274 | ||
275 | /* Baud rate specified for talking to serial target systems. Default | |
276 | is left as a zero pointer, so targets can choose their own defaults. */ | |
277 | ||
278 | char *baud_rate; | |
279 | ||
280 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ | |
281 | ||
282 | #ifndef STOP_SIGNAL | |
283 | #ifdef SIGTSTP | |
284 | #define STOP_SIGNAL SIGTSTP | |
30875e1c | 285 | static void stop_sig PARAMS ((int)); |
bd5635a1 RP |
286 | #endif |
287 | #endif | |
d566d62a JK |
288 | |
289 | /* Some System V have job control but not sigsetmask(). */ | |
290 | #if !defined (HAVE_SIGSETMASK) | |
291 | #define HAVE_SIGSETMASK !defined (USG) | |
292 | #endif | |
293 | ||
8b3c897a | 294 | #if 0 == (HAVE_SIGSETMASK) |
d566d62a JK |
295 | #define sigsetmask(n) |
296 | #endif | |
bd5635a1 RP |
297 | \f |
298 | /* This is how `error' returns to command level. */ | |
299 | ||
300 | jmp_buf to_top_level; | |
301 | ||
30875e1c | 302 | NORETURN void |
bd5635a1 RP |
303 | return_to_top_level () |
304 | { | |
305 | quit_flag = 0; | |
306 | immediate_quit = 0; | |
307 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ | |
bd5635a1 | 308 | disable_current_display (); |
f266e564 | 309 | do_cleanups (ALL_CLEANUPS); |
30875e1c | 310 | (NORETURN void) longjmp (to_top_level, 1); |
bd5635a1 RP |
311 | } |
312 | ||
313 | /* Call FUNC with arg ARGS, catching any errors. | |
314 | If there is no error, return the value returned by FUNC. | |
81066208 JG |
315 | If there is an error, print ERRSTRING, print the specific error message, |
316 | then return zero. */ | |
bd5635a1 RP |
317 | |
318 | int | |
319 | catch_errors (func, args, errstring) | |
30875e1c | 320 | int (*func) PARAMS ((char *)); |
bdbd5f50 | 321 | char *args; |
bd5635a1 RP |
322 | char *errstring; |
323 | { | |
324 | jmp_buf saved; | |
325 | int val; | |
326 | struct cleanup *saved_cleanup_chain; | |
81066208 | 327 | char *saved_error_pre_print; |
bd5635a1 RP |
328 | |
329 | saved_cleanup_chain = save_cleanups (); | |
81066208 | 330 | saved_error_pre_print = error_pre_print; |
bd5635a1 | 331 | |
318bf84f | 332 | memcpy ((char *)saved, (char *)to_top_level, sizeof (jmp_buf)); |
81066208 | 333 | error_pre_print = errstring; |
bd5635a1 RP |
334 | |
335 | if (setjmp (to_top_level) == 0) | |
336 | val = (*func) (args); | |
337 | else | |
81066208 | 338 | val = 0; |
bd5635a1 RP |
339 | |
340 | restore_cleanups (saved_cleanup_chain); | |
341 | ||
81066208 | 342 | error_pre_print = saved_error_pre_print; |
318bf84f | 343 | memcpy ((char *)to_top_level, (char *)saved, sizeof (jmp_buf)); |
bd5635a1 RP |
344 | return val; |
345 | } | |
346 | ||
347 | /* Handler for SIGHUP. */ | |
348 | ||
349 | static void | |
30875e1c SG |
350 | disconnect (signo) |
351 | int signo; | |
bd5635a1 RP |
352 | { |
353 | kill_inferior_fast (); | |
318bf84f | 354 | signal (signo, SIG_DFL); |
bd5635a1 RP |
355 | kill (getpid (), SIGHUP); |
356 | } | |
357 | \f | |
358 | /* Clean up on error during a "source" command (or execution of a | |
359 | user-defined command). */ | |
360 | ||
361 | static void | |
362 | source_cleanup (stream) | |
363 | FILE *stream; | |
364 | { | |
365 | /* Restore the previous input stream. */ | |
366 | instream = stream; | |
367 | } | |
368 | ||
369 | /* Read commands from STREAM. */ | |
370 | static void | |
371 | read_command_file (stream) | |
372 | FILE *stream; | |
373 | { | |
374 | struct cleanup *cleanups; | |
375 | ||
376 | cleanups = make_cleanup (source_cleanup, instream); | |
377 | instream = stream; | |
378 | command_loop (); | |
379 | do_cleanups (cleanups); | |
380 | } | |
381 | \f | |
382 | int | |
383 | main (argc, argv) | |
384 | int argc; | |
385 | char **argv; | |
386 | { | |
387 | int count; | |
388 | static int inhibit_gdbinit = 0; | |
389 | static int quiet = 0; | |
390 | static int batch = 0; | |
391 | ||
392 | /* Pointers to various arguments from command line. */ | |
393 | char *symarg = NULL; | |
394 | char *execarg = NULL; | |
395 | char *corearg = NULL; | |
396 | char *cdarg = NULL; | |
397 | char *ttyarg = NULL; | |
398 | ||
399 | /* Pointers to all arguments of +command option. */ | |
400 | char **cmdarg; | |
401 | /* Allocated size of cmdarg. */ | |
402 | int cmdsize; | |
403 | /* Number of elements of cmdarg used. */ | |
404 | int ncmd; | |
405 | ||
406 | /* Indices of all arguments of +directory option. */ | |
407 | char **dirarg; | |
408 | /* Allocated size. */ | |
409 | int dirsize; | |
410 | /* Number of elements used. */ | |
411 | int ndir; | |
412 | ||
413 | register int i; | |
414 | ||
415 | /* This needs to happen before the first use of malloc. */ | |
318bf84f | 416 | init_malloc ((PTR) NULL); |
bd5635a1 RP |
417 | |
418 | #if defined (ALIGN_STACK_ON_STARTUP) | |
419 | i = (int) &count & 0x3; | |
420 | if (i != 0) | |
421 | alloca (4 - i); | |
422 | #endif | |
423 | ||
bd099407 JG |
424 | /* If error() is called from initialization code, just exit */ |
425 | if (setjmp (to_top_level)) { | |
426 | exit(1); | |
427 | } | |
428 | ||
bd5635a1 RP |
429 | cmdsize = 1; |
430 | cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg)); | |
431 | ncmd = 0; | |
432 | dirsize = 1; | |
433 | dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); | |
434 | ndir = 0; | |
435 | ||
436 | quit_flag = 0; | |
437 | line = (char *) xmalloc (linesize); | |
438 | line[0] = '\0'; /* Terminate saved (now empty) cmd line */ | |
439 | instream = stdin; | |
440 | ||
f7402c04 | 441 | getcwd (dirbuf, sizeof (dirbuf)); |
bd5635a1 RP |
442 | current_directory = dirbuf; |
443 | ||
444 | #ifdef SET_STACK_LIMIT_HUGE | |
445 | { | |
446 | struct rlimit rlim; | |
447 | ||
448 | /* Set the stack limit huge so that alloca (particularly stringtab | |
449 | * in dbxread.c) does not fail. */ | |
450 | getrlimit (RLIMIT_STACK, &rlim); | |
451 | original_stack_limit = rlim.rlim_cur; | |
452 | rlim.rlim_cur = rlim.rlim_max; | |
453 | setrlimit (RLIMIT_STACK, &rlim); | |
454 | } | |
455 | #endif /* SET_STACK_LIMIT_HUGE */ | |
456 | ||
457 | /* Parse arguments and options. */ | |
458 | { | |
459 | int c; | |
460 | static int print_help; | |
461 | /* When var field is 0, use flag field to record the equivalent | |
462 | short option (or arbitrary numbers starting at 10 for those | |
463 | with no equivalent). */ | |
464 | static struct option long_options[] = | |
465 | { | |
318bf84f FF |
466 | {"readnow", no_argument, &readnow_symbol_files, 1}, |
467 | {"r", no_argument, &readnow_symbol_files, 1}, | |
468 | {"mapped", no_argument, &mapped_symbol_files, 1}, | |
469 | {"m", no_argument, &mapped_symbol_files, 1}, | |
ee0613d1 JG |
470 | {"quiet", no_argument, &quiet, 1}, |
471 | {"q", no_argument, &quiet, 1}, | |
472 | {"nx", no_argument, &inhibit_gdbinit, 1}, | |
473 | {"n", no_argument, &inhibit_gdbinit, 1}, | |
474 | {"batch", no_argument, &batch, 1}, | |
475 | {"epoch", no_argument, &epoch_interface, 1}, | |
476 | {"fullname", no_argument, &frame_file_full_name, 1}, | |
477 | {"f", no_argument, &frame_file_full_name, 1}, | |
478 | {"help", no_argument, &print_help, 1}, | |
479 | {"se", required_argument, 0, 10}, | |
480 | {"symbols", required_argument, 0, 's'}, | |
481 | {"s", required_argument, 0, 's'}, | |
482 | {"exec", required_argument, 0, 'e'}, | |
483 | {"e", required_argument, 0, 'e'}, | |
484 | {"core", required_argument, 0, 'c'}, | |
485 | {"c", required_argument, 0, 'c'}, | |
486 | {"command", required_argument, 0, 'x'}, | |
487 | {"x", required_argument, 0, 'x'}, | |
488 | {"directory", required_argument, 0, 'd'}, | |
489 | {"cd", required_argument, 0, 11}, | |
490 | {"tty", required_argument, 0, 't'}, | |
491 | {"baud", required_argument, 0, 'b'}, | |
492 | {"b", required_argument, 0, 'b'}, | |
bd5635a1 RP |
493 | /* Allow machine descriptions to add more options... */ |
494 | #ifdef ADDITIONAL_OPTIONS | |
495 | ADDITIONAL_OPTIONS | |
496 | #endif | |
ee0613d1 | 497 | {0, no_argument, 0, 0}, |
bd5635a1 RP |
498 | }; |
499 | ||
500 | while (1) | |
501 | { | |
ee0613d1 JG |
502 | int option_index; |
503 | ||
bd5635a1 RP |
504 | c = getopt_long_only (argc, argv, "", |
505 | long_options, &option_index); | |
506 | if (c == EOF) | |
507 | break; | |
508 | ||
509 | /* Long option that takes an argument. */ | |
510 | if (c == 0 && long_options[option_index].flag == 0) | |
511 | c = long_options[option_index].val; | |
512 | ||
513 | switch (c) | |
514 | { | |
515 | case 0: | |
516 | /* Long option that just sets a flag. */ | |
517 | break; | |
518 | case 10: | |
519 | symarg = optarg; | |
520 | execarg = optarg; | |
521 | break; | |
522 | case 11: | |
523 | cdarg = optarg; | |
524 | break; | |
525 | case 's': | |
526 | symarg = optarg; | |
527 | break; | |
528 | case 'e': | |
529 | execarg = optarg; | |
530 | break; | |
531 | case 'c': | |
532 | corearg = optarg; | |
533 | break; | |
534 | case 'x': | |
535 | cmdarg[ncmd++] = optarg; | |
536 | if (ncmd >= cmdsize) | |
537 | { | |
538 | cmdsize *= 2; | |
539 | cmdarg = (char **) xrealloc ((char *)cmdarg, | |
540 | cmdsize * sizeof (*cmdarg)); | |
541 | } | |
542 | break; | |
543 | case 'd': | |
544 | dirarg[ndir++] = optarg; | |
545 | if (ndir >= dirsize) | |
546 | { | |
547 | dirsize *= 2; | |
548 | dirarg = (char **) xrealloc ((char *)dirarg, | |
549 | dirsize * sizeof (*dirarg)); | |
550 | } | |
551 | break; | |
552 | case 't': | |
553 | ttyarg = optarg; | |
554 | break; | |
555 | case 'q': | |
556 | quiet = 1; | |
557 | break; | |
558 | case 'b': | |
559 | baud_rate = optarg; | |
560 | break; | |
561 | #ifdef ADDITIONAL_OPTION_CASES | |
562 | ADDITIONAL_OPTION_CASES | |
563 | #endif | |
564 | case '?': | |
565 | fprintf (stderr, | |
566 | "Use `%s +help' for a complete list of options.\n", | |
567 | argv[0]); | |
568 | exit (1); | |
569 | } | |
570 | ||
571 | } | |
572 | if (print_help) | |
573 | { | |
574 | fputs ("\ | |
575 | This is GDB, the GNU debugger. Use the command\n\ | |
576 | gdb [options] [executable [core-file]]\n\ | |
577 | to enter the debugger.\n\ | |
578 | \n\ | |
579 | Options available are:\n\ | |
580 | -help Print this message.\n\ | |
581 | -quiet Do not print version number on startup.\n\ | |
582 | -fullname Output information used by emacs-GDB interface.\n\ | |
583 | -epoch Output information used by epoch emacs-GDB interface.\n\ | |
584 | -batch Exit after processing options.\n\ | |
585 | -nx Do not read .gdbinit file.\n\ | |
586 | -tty=TTY Use TTY for input/output by the program being debugged.\n\ | |
587 | -cd=DIR Change current directory to DIR.\n\ | |
588 | -directory=DIR Search for source files in DIR.\n\ | |
589 | -command=FILE Execute GDB commands from FILE.\n\ | |
590 | -symbols=SYMFILE Read symbols from SYMFILE.\n\ | |
591 | -exec=EXECFILE Use EXECFILE as the executable.\n\ | |
592 | -se=FILE Use FILE as symbol file and executable file.\n\ | |
593 | -core=COREFILE Analyze the core dump COREFILE.\n\ | |
b0246b3b FF |
594 | -b BAUDRATE Set serial port baud rate used for remote debugging.\n\ |
595 | -mapped Use mapped symbol files if supported on this system.\n\ | |
596 | -readnow Fully read symbol files on first access.\n\ | |
bd5635a1 RP |
597 | ", stderr); |
598 | #ifdef ADDITIONAL_OPTION_HELP | |
599 | fputs (ADDITIONAL_OPTION_HELP, stderr); | |
600 | #endif | |
601 | fputs ("\n\ | |
602 | For more information, type \"help\" from within GDB, or consult the\n\ | |
603 | GDB manual (available as on-line info or a printed manual).\n", stderr); | |
604 | /* Exiting after printing this message seems like | |
605 | the most useful thing to do. */ | |
606 | exit (0); | |
607 | } | |
608 | ||
609 | /* OK, that's all the options. The other arguments are filenames. */ | |
610 | count = 0; | |
611 | for (; optind < argc; optind++) | |
612 | switch (++count) | |
613 | { | |
614 | case 1: | |
615 | symarg = argv[optind]; | |
616 | execarg = argv[optind]; | |
617 | break; | |
618 | case 2: | |
619 | corearg = argv[optind]; | |
620 | break; | |
621 | case 3: | |
622 | fprintf (stderr, | |
623 | "Excess command line arguments ignored. (%s%s)\n", | |
624 | argv[optind], (optind == argc - 1) ? "" : " ..."); | |
625 | break; | |
626 | } | |
627 | if (batch) | |
628 | quiet = 1; | |
629 | } | |
630 | ||
631 | /* Run the init function of each source file */ | |
632 | ||
633 | initialize_cmd_lists (); /* This needs to be done first */ | |
634 | initialize_all_files (); | |
635 | initialize_main (); /* But that omits this file! Do it now */ | |
636 | init_signals (); | |
637 | ||
638 | if (!quiet) | |
639 | { | |
81066208 JG |
640 | /* Print all the junk at the top, with trailing "..." if we are about |
641 | to read a symbol file (possibly slowly). */ | |
642 | print_gnu_advertisement (); | |
643 | print_gdb_version (); | |
644 | if (symarg) | |
645 | printf_filtered (".."); | |
bd099407 | 646 | wrap_here(""); |
81066208 | 647 | fflush (stdout); /* Force to screen during slow operations */ |
bd5635a1 RP |
648 | } |
649 | ||
81066208 | 650 | error_pre_print = "\n\n"; |
318bf84f | 651 | warning_pre_print = "\n\nwarning: "; |
81066208 | 652 | |
bd5635a1 RP |
653 | /* Now perform all the actions indicated by the arguments. */ |
654 | if (cdarg != NULL) | |
655 | { | |
656 | if (!setjmp (to_top_level)) | |
657 | { | |
658 | cd_command (cdarg, 0); | |
659 | init_source_path (); | |
660 | } | |
661 | } | |
f266e564 JK |
662 | do_cleanups (ALL_CLEANUPS); |
663 | ||
bd5635a1 RP |
664 | for (i = 0; i < ndir; i++) |
665 | if (!setjmp (to_top_level)) | |
666 | directory_command (dirarg[i], 0); | |
667 | free (dirarg); | |
f266e564 JK |
668 | do_cleanups (ALL_CLEANUPS); |
669 | ||
bd5635a1 RP |
670 | if (execarg != NULL |
671 | && symarg != NULL | |
672 | && strcmp (execarg, symarg) == 0) | |
673 | { | |
674 | /* The exec file and the symbol-file are the same. If we can't open | |
675 | it, better only print one error message. */ | |
676 | if (!setjmp (to_top_level)) | |
677 | { | |
678 | exec_file_command (execarg, !batch); | |
81066208 | 679 | symbol_file_command (symarg, 0); |
bd5635a1 RP |
680 | } |
681 | } | |
682 | else | |
683 | { | |
684 | if (execarg != NULL) | |
685 | if (!setjmp (to_top_level)) | |
686 | exec_file_command (execarg, !batch); | |
687 | if (symarg != NULL) | |
688 | if (!setjmp (to_top_level)) | |
81066208 | 689 | symbol_file_command (symarg, 0); |
bd5635a1 | 690 | } |
f266e564 JK |
691 | do_cleanups (ALL_CLEANUPS); |
692 | ||
81066208 JG |
693 | /* After the symbol file has been read, print a newline to get us |
694 | beyond the copyright line... But errors should still set off | |
695 | the error message with a (single) blank line. */ | |
afe4ca15 JG |
696 | if (!quiet) |
697 | printf_filtered ("\n"); | |
81066208 | 698 | error_pre_print = "\n"; |
318bf84f | 699 | warning_pre_print = "\nwarning: "; |
81066208 | 700 | |
7d9884b9 JG |
701 | /* Set the initial language. */ |
702 | { | |
7d9884b9 JG |
703 | struct partial_symtab *pst = find_main_psymtab (); |
704 | enum language lang = language_unknown; | |
705 | if (pst == NULL) ; | |
706 | #if 0 | |
707 | /* A better solution would set the language when reading the psymtab. | |
708 | This would win for symbol file formats that encode the langauge, | |
30875e1c | 709 | such as DWARF. But, we don't do that yet. FIXME */ |
7d9884b9 JG |
710 | else if (pst->language != language_unknown) |
711 | lang = pst->language; | |
712 | #endif | |
713 | else if (pst->filename != NULL) | |
714 | lang = deduce_language_from_filename (pst->filename); | |
715 | if (lang == language_unknown) /* Make C the default language */ | |
716 | lang = language_c; | |
717 | set_language (lang); | |
718 | } | |
719 | ||
bd5635a1 RP |
720 | if (corearg != NULL) |
721 | if (!setjmp (to_top_level)) | |
722 | core_file_command (corearg, !batch); | |
e522fb52 | 723 | else if (isdigit (corearg[0]) && !setjmp (to_top_level)) |
bd5635a1 | 724 | attach_command (corearg, !batch); |
f266e564 | 725 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
726 | |
727 | if (ttyarg != NULL) | |
728 | if (!setjmp (to_top_level)) | |
729 | tty_command (ttyarg, !batch); | |
f266e564 | 730 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
731 | |
732 | #ifdef ADDITIONAL_OPTION_HANDLER | |
733 | ADDITIONAL_OPTION_HANDLER; | |
734 | #endif | |
735 | ||
81066208 JG |
736 | /* Error messages should no longer be distinguished with extra output. */ |
737 | error_pre_print = 0; | |
318bf84f | 738 | warning_pre_print = "warning: "; |
81066208 | 739 | |
bd5635a1 RP |
740 | { |
741 | struct stat homebuf, cwdbuf; | |
742 | char *homedir, *homeinit; | |
743 | ||
744 | /* Read init file, if it exists in home directory */ | |
745 | homedir = getenv ("HOME"); | |
746 | if (homedir) | |
747 | { | |
748 | homeinit = (char *) alloca (strlen (getenv ("HOME")) + | |
749 | strlen (gdbinit) + 10); | |
750 | strcpy (homeinit, getenv ("HOME")); | |
751 | strcat (homeinit, "/"); | |
752 | strcat (homeinit, gdbinit); | |
753 | if (!inhibit_gdbinit && access (homeinit, R_OK) == 0) | |
754 | if (!setjmp (to_top_level)) | |
755 | source_command (homeinit, 0); | |
f266e564 | 756 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
757 | |
758 | /* Do stats; no need to do them elsewhere since we'll only | |
759 | need them if homedir is set. Make sure that they are | |
760 | zero in case one of them fails (this guarantees that they | |
761 | won't match if either exists). */ | |
762 | ||
318bf84f FF |
763 | memset (&homebuf, 0, sizeof (struct stat)); |
764 | memset (&cwdbuf, 0, sizeof (struct stat)); | |
bd5635a1 RP |
765 | |
766 | stat (homeinit, &homebuf); | |
767 | stat (gdbinit, &cwdbuf); /* We'll only need this if | |
768 | homedir was set. */ | |
769 | } | |
770 | ||
771 | /* Read the input file in the current directory, *if* it isn't | |
772 | the same file (it should exist, also). */ | |
773 | ||
774 | if (!homedir | |
775 | || bcmp ((char *) &homebuf, | |
776 | (char *) &cwdbuf, | |
777 | sizeof (struct stat))) | |
778 | if (!inhibit_gdbinit && access (gdbinit, R_OK) == 0) | |
779 | if (!setjmp (to_top_level)) | |
780 | source_command (gdbinit, 0); | |
f266e564 | 781 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
782 | } |
783 | ||
784 | for (i = 0; i < ncmd; i++) | |
785 | if (!setjmp (to_top_level)) | |
786 | { | |
787 | if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0') | |
788 | read_command_file (stdin); | |
789 | else | |
790 | source_command (cmdarg[i], !batch); | |
f266e564 | 791 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
792 | } |
793 | free (cmdarg); | |
794 | ||
8b3c897a SG |
795 | /* Read in the old history after all the command files have been read. */ |
796 | initialize_history(); | |
797 | ||
bd5635a1 RP |
798 | if (batch) |
799 | { | |
800 | /* We have hit the end of the batch file. */ | |
801 | exit (0); | |
802 | } | |
803 | ||
804 | /* Do any host- or target-specific hacks. This is used for i960 targets | |
805 | to force the user to set a nindy target and spec its parameters. */ | |
806 | ||
807 | #ifdef BEFORE_MAIN_LOOP_HOOK | |
808 | BEFORE_MAIN_LOOP_HOOK; | |
809 | #endif | |
810 | ||
811 | /* The command loop. */ | |
812 | ||
813 | while (1) | |
814 | { | |
815 | if (!setjmp (to_top_level)) | |
816 | { | |
f266e564 | 817 | do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */ |
bd5635a1 RP |
818 | command_loop (); |
819 | quit_command ((char *)0, instream == stdin); | |
820 | } | |
821 | } | |
822 | /* No exit -- exit is through quit_command. */ | |
823 | } | |
824 | ||
825 | /* Execute the line P as a command. | |
826 | Pass FROM_TTY as second argument to the defining function. */ | |
827 | ||
828 | void | |
829 | execute_command (p, from_tty) | |
830 | char *p; | |
831 | int from_tty; | |
832 | { | |
833 | register struct cmd_list_element *c; | |
834 | register struct command_line *cmdlines; | |
bd099407 | 835 | register enum language flang; |
ee0613d1 | 836 | static const struct language_defn *saved_language = 0; |
bd099407 | 837 | static int warned = 0; |
bd5635a1 RP |
838 | |
839 | free_all_values (); | |
840 | ||
841 | /* This can happen when command_line_input hits end of file. */ | |
842 | if (p == NULL) | |
843 | return; | |
844 | ||
845 | while (*p == ' ' || *p == '\t') p++; | |
846 | if (*p) | |
847 | { | |
848 | char *arg; | |
849 | ||
850 | c = lookup_cmd (&p, cmdlist, "", 0, 1); | |
851 | /* Pass null arg rather than an empty one. */ | |
852 | arg = *p ? p : 0; | |
853 | if (c->class == class_user) | |
854 | { | |
855 | struct cleanup *old_chain; | |
856 | ||
857 | if (*p) | |
858 | error ("User-defined commands cannot take arguments."); | |
859 | cmdlines = c->user_commands; | |
860 | if (cmdlines == 0) | |
861 | /* Null command */ | |
862 | return; | |
863 | ||
864 | /* Set the instream to 0, indicating execution of a | |
865 | user-defined function. */ | |
866 | old_chain = make_cleanup (source_cleanup, instream); | |
867 | instream = (FILE *) 0; | |
868 | while (cmdlines) | |
869 | { | |
870 | execute_command (cmdlines->line, 0); | |
871 | cmdlines = cmdlines->next; | |
872 | } | |
873 | do_cleanups (old_chain); | |
874 | } | |
875 | else if (c->type == set_cmd || c->type == show_cmd) | |
876 | do_setshow_command (arg, from_tty & caution, c); | |
30875e1c | 877 | else if (c->function.cfunc == NO_FUNCTION) |
bd5635a1 RP |
878 | error ("That is not a command, just a help topic."); |
879 | else | |
30875e1c | 880 | (*c->function.cfunc) (arg, from_tty & caution); |
bd099407 JG |
881 | } |
882 | ||
afe4ca15 JG |
883 | /* Tell the user if the language has changed (except first time). */ |
884 | if (current_language != saved_language) | |
bd099407 JG |
885 | { |
886 | if (language_mode == language_mode_auto) { | |
afe4ca15 | 887 | if (saved_language) |
ee0613d1 | 888 | language_info (1); /* Print what changed. */ |
bd5635a1 | 889 | } |
afe4ca15 | 890 | saved_language = current_language; |
bd099407 JG |
891 | warned = 0; |
892 | } | |
893 | ||
894 | /* Warn the user if the working language does not match the | |
895 | language of the current frame. Only warn the user if we are | |
896 | actually running the program, i.e. there is a stack. */ | |
afe4ca15 JG |
897 | /* FIXME: This should be cacheing the frame and only running when |
898 | the frame changes. */ | |
bd099407 JG |
899 | if (target_has_stack) |
900 | { | |
afe4ca15 JG |
901 | flang = get_frame_language (); |
902 | if (!warned | |
903 | && flang != language_unknown | |
904 | && flang != current_language->la_language) | |
bd099407 JG |
905 | { |
906 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
907 | warned = 1; | |
908 | } | |
909 | } | |
bd5635a1 RP |
910 | } |
911 | ||
912 | /* ARGSUSED */ | |
30875e1c | 913 | static void |
f266e564 | 914 | command_loop_marker (foo) |
bd5635a1 RP |
915 | int foo; |
916 | { | |
917 | } | |
918 | ||
919 | /* Read commands from `instream' and execute them | |
920 | until end of file or error reading instream. */ | |
30875e1c | 921 | static void |
bd5635a1 RP |
922 | command_loop () |
923 | { | |
924 | struct cleanup *old_chain; | |
925 | char *command; | |
926 | int stdin_is_tty = ISATTY (stdin); | |
927 | ||
928 | while (!feof (instream)) | |
929 | { | |
930 | if (window_hook && instream == stdin) | |
931 | (*window_hook) (instream, prompt); | |
932 | ||
933 | quit_flag = 0; | |
934 | if (instream == stdin && stdin_is_tty) | |
935 | reinitialize_more_filter (); | |
f266e564 | 936 | old_chain = make_cleanup (command_loop_marker, 0); |
30875e1c | 937 | command = command_line_input (instream == stdin ? prompt : (char *) NULL, |
bd5635a1 RP |
938 | instream == stdin); |
939 | if (command == 0) | |
940 | return; | |
941 | execute_command (command, instream == stdin); | |
942 | /* Do any commands attached to breakpoint we stopped at. */ | |
943 | bpstat_do_actions (&stop_bpstat); | |
944 | do_cleanups (old_chain); | |
945 | } | |
946 | } | |
947 | \f | |
948 | /* Commands call this if they do not want to be repeated by null lines. */ | |
949 | ||
950 | void | |
951 | dont_repeat () | |
952 | { | |
953 | /* If we aren't reading from standard input, we are saving the last | |
954 | thing read from stdin in line and don't want to delete it. Null lines | |
955 | won't repeat here in any case. */ | |
956 | if (instream == stdin) | |
957 | *line = 0; | |
958 | } | |
959 | \f | |
960 | /* Read a line from the stream "instream" without command line editing. | |
961 | ||
962 | It prints PRROMPT once at the start. | |
bdbd5f50 JG |
963 | Action is compatible with "readline", e.g. space for the result is |
964 | malloc'd and should be freed by the caller. | |
bd5635a1 | 965 | |
bdbd5f50 | 966 | A NULL return means end of file. */ |
bd5635a1 | 967 | char * |
bdbd5f50 | 968 | gdb_readline (prrompt) |
bd5635a1 | 969 | char *prrompt; |
bd5635a1 RP |
970 | { |
971 | int c; | |
972 | char *result; | |
973 | int input_index = 0; | |
974 | int result_size = 80; | |
975 | ||
976 | if (prrompt) | |
977 | { | |
978 | printf (prrompt); | |
979 | fflush (stdout); | |
980 | } | |
981 | ||
bdbd5f50 | 982 | result = (char *) xmalloc (result_size); |
bd5635a1 RP |
983 | |
984 | while (1) | |
985 | { | |
986 | /* Read from stdin if we are executing a user defined command. | |
987 | This is the right thing for prompt_for_continue, at least. */ | |
988 | c = fgetc (instream ? instream : stdin); | |
bdbd5f50 JG |
989 | |
990 | if (c == EOF) | |
bd5635a1 | 991 | { |
bdbd5f50 JG |
992 | free (result); |
993 | return NULL; | |
bd5635a1 | 994 | } |
bd5635a1 | 995 | |
bdbd5f50 JG |
996 | if (c == '\n') |
997 | break; | |
bd5635a1 | 998 | |
bdbd5f50 JG |
999 | result[input_index++] = c; |
1000 | while (input_index >= result_size) | |
1001 | { | |
1002 | result_size *= 2; | |
1003 | result = (char *) xrealloc (result, result_size); | |
1004 | } | |
bd5635a1 | 1005 | } |
bdbd5f50 JG |
1006 | |
1007 | result[input_index++] = '\0'; | |
1008 | return result; | |
bd5635a1 RP |
1009 | } |
1010 | ||
bd5635a1 RP |
1011 | /* Variables which control command line editing and history |
1012 | substitution. These variables are given default values at the end | |
1013 | of this file. */ | |
1014 | static int command_editing_p; | |
1015 | static int history_expansion_p; | |
1016 | static int write_history_p; | |
1017 | static int history_size; | |
1018 | static char *history_filename; | |
1019 | ||
1020 | /* Variables which are necessary for fancy command line editing. */ | |
1021 | char *gdb_completer_word_break_characters = | |
1022 | " \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,"; | |
1023 | ||
1024 | /* Functions that are used as part of the fancy command line editing. */ | |
1025 | ||
1026 | /* This can be used for functions which don't want to complete on symbols | |
1027 | but don't want to complete on anything else either. */ | |
1028 | /* ARGSUSED */ | |
1029 | char ** | |
1030 | noop_completer (text) | |
1031 | char *text; | |
1032 | { | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
1036 | /* Generate symbol names one by one for the completer. If STATE is | |
1037 | zero, then we need to initialize, otherwise the initialization has | |
1038 | already taken place. TEXT is what we expect the symbol to start | |
1039 | with. RL_LINE_BUFFER is available to be looked at; it contains the | |
1040 | entire text of the line. RL_POINT is the offset in that line of | |
1041 | the cursor. You should pretend that the line ends at RL_POINT. | |
1042 | The result is NULL if there are no more completions, else a char | |
1043 | string which is a possible completion. */ | |
30875e1c SG |
1044 | |
1045 | static char * | |
bd5635a1 RP |
1046 | symbol_completion_function (text, state) |
1047 | char *text; | |
1048 | int state; | |
1049 | { | |
1050 | static char **list = (char **)NULL; | |
1051 | static int index; | |
1052 | char *output; | |
1053 | extern char *rl_line_buffer; | |
1054 | extern int rl_point; | |
1055 | char *tmp_command, *p; | |
1056 | struct cmd_list_element *c, *result_list; | |
1057 | ||
1058 | if (!state) | |
1059 | { | |
1060 | /* Free the storage used by LIST, but not by the strings inside. This is | |
1061 | because rl_complete_internal () frees the strings. */ | |
1062 | if (list) | |
1063 | free (list); | |
1064 | list = 0; | |
1065 | index = 0; | |
1066 | ||
1067 | /* Decide whether to complete on a list of gdb commands or on | |
1068 | symbols. */ | |
1069 | tmp_command = (char *) alloca (rl_point + 1); | |
1070 | p = tmp_command; | |
1071 | ||
1072 | strncpy (tmp_command, rl_line_buffer, rl_point); | |
1073 | tmp_command[rl_point] = '\0'; | |
1074 | ||
1075 | if (rl_point == 0) | |
1076 | { | |
1077 | /* An empty line we want to consider ambiguous; that is, | |
1078 | it could be any command. */ | |
1079 | c = (struct cmd_list_element *) -1; | |
1080 | result_list = 0; | |
1081 | } | |
1082 | else | |
1083 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
1084 | ||
1085 | /* Move p up to the next interesting thing. */ | |
1086 | while (*p == ' ' || *p == '\t') | |
1087 | p++; | |
1088 | ||
1089 | if (!c) | |
1090 | /* He's typed something unrecognizable. Sigh. */ | |
1091 | list = (char **) 0; | |
1092 | else if (c == (struct cmd_list_element *) -1) | |
1093 | { | |
1094 | /* If we didn't recognize everything up to the thing that | |
1095 | needs completing, and we don't know what command it is | |
1096 | yet, we are in trouble. Part of the trouble might be | |
1097 | that the list of delimiters used by readline includes | |
1098 | '-', which we use in commands. Check for this. */ | |
1099 | if (p + strlen(text) != tmp_command + rl_point) { | |
1100 | if (tmp_command[rl_point - strlen(text) - 1] == '-') | |
1101 | text = p; | |
1102 | else { | |
1103 | /* This really should not produce an error. Better would | |
1104 | be to pretend to hit RETURN here; this would produce a | |
1105 | response like "Ambiguous command: foo, foobar, etc", | |
1106 | and leave the line available for re-entry with ^P. Instead, | |
1107 | this error blows away the user's typed input without | |
1108 | any way to get it back. */ | |
1109 | error (" Unrecognized command."); | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /* He's typed something ambiguous. This is easier. */ | |
1114 | if (result_list) | |
1115 | list = complete_on_cmdlist (*result_list->prefixlist, text); | |
1116 | else | |
1117 | list = complete_on_cmdlist (cmdlist, text); | |
1118 | } | |
1119 | else | |
1120 | { | |
1121 | /* If we've gotten this far, gdb has recognized a full | |
1122 | command. There are several possibilities: | |
1123 | ||
1124 | 1) We need to complete on the command. | |
1125 | 2) We need to complete on the possibilities coming after | |
1126 | the command. | |
1127 | 2) We need to complete the text of what comes after the | |
1128 | command. */ | |
1129 | ||
1130 | if (!*p && *text) | |
1131 | /* Always (might be longer versions of thie command). */ | |
1132 | list = complete_on_cmdlist (result_list, text); | |
1133 | else if (!*p && !*text) | |
1134 | { | |
1135 | if (c->prefixlist) | |
1136 | list = complete_on_cmdlist (*c->prefixlist, ""); | |
1137 | else | |
1138 | list = (*c->completer) (""); | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | if (c->prefixlist && !c->allow_unknown) | |
1143 | { | |
1144 | #if 0 | |
1145 | /* Something like "info adsfkdj". But error() is not | |
1146 | the proper response; just return no completions | |
1147 | instead. */ | |
1148 | *p = '\0'; | |
1149 | error ("\"%s\" command requires a subcommand.", | |
1150 | tmp_command); | |
1151 | #else | |
1152 | list = NULL; | |
1153 | #endif | |
1154 | } | |
1155 | else | |
1156 | list = (*c->completer) (text); | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | /* If the debugged program wasn't compiled with symbols, or if we're | |
1162 | clearly completing on a command and no command matches, return | |
1163 | NULL. */ | |
1164 | if (!list) | |
1165 | return ((char *)NULL); | |
1166 | ||
1167 | output = list[index]; | |
1168 | if (output) | |
1169 | index++; | |
1170 | ||
1171 | return (output); | |
1172 | } | |
1173 | \f | |
1174 | #ifdef STOP_SIGNAL | |
1175 | static void | |
30875e1c SG |
1176 | stop_sig (signo) |
1177 | int signo; | |
bd5635a1 RP |
1178 | { |
1179 | #if STOP_SIGNAL == SIGTSTP | |
1180 | signal (SIGTSTP, SIG_DFL); | |
1181 | sigsetmask (0); | |
1182 | kill (getpid (), SIGTSTP); | |
1183 | signal (SIGTSTP, stop_sig); | |
1184 | #else | |
1185 | signal (STOP_SIGNAL, stop_sig); | |
1186 | #endif | |
1187 | printf ("%s", prompt); | |
1188 | fflush (stdout); | |
1189 | ||
1190 | /* Forget about any previous command -- null line now will do nothing. */ | |
1191 | dont_repeat (); | |
1192 | } | |
1193 | #endif /* STOP_SIGNAL */ | |
1194 | ||
bd5635a1 | 1195 | /* Initialize signal handlers. */ |
f266e564 | 1196 | static void |
30875e1c SG |
1197 | do_nothing (signo) |
1198 | int signo; | |
f266e564 JK |
1199 | { |
1200 | } | |
1201 | ||
bd5635a1 RP |
1202 | static void |
1203 | init_signals () | |
1204 | { | |
bd5635a1 RP |
1205 | signal (SIGINT, request_quit); |
1206 | ||
1207 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
1208 | passed to the inferior, which we don't want. It would be | |
1209 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
bdbd5f50 | 1210 | on BSD4.3 systems using vfork, that can affect the |
bd5635a1 | 1211 | GDB process as well as the inferior (the signal handling tables |
bdbd5f50 | 1212 | might be in memory, shared between the two). Since we establish |
bd5635a1 RP |
1213 | a handler for SIGQUIT, when we call exec it will set the signal |
1214 | to SIG_DFL for us. */ | |
1215 | signal (SIGQUIT, do_nothing); | |
1216 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
1217 | signal (SIGHUP, disconnect); | |
1218 | signal (SIGFPE, float_handler); | |
1eeba686 PB |
1219 | |
1220 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
1221 | signal (SIGWINCH, SIGWINCH_HANDLER); | |
1222 | #endif | |
bd5635a1 RP |
1223 | } |
1224 | \f | |
1225 | /* Read one line from the command input stream `instream' | |
1226 | into the local static buffer `linebuffer' (whose current length | |
1227 | is `linelength'). | |
1228 | The buffer is made bigger as necessary. | |
1229 | Returns the address of the start of the line. | |
1230 | ||
1231 | NULL is returned for end of file. | |
1232 | ||
1233 | *If* the instream == stdin & stdin is a terminal, the line read | |
1234 | is copied into the file line saver (global var char *line, | |
1235 | length linesize) so that it can be duplicated. | |
1236 | ||
1237 | This routine either uses fancy command line editing or | |
1238 | simple input as the user has requested. */ | |
1239 | ||
1240 | char * | |
1241 | command_line_input (prrompt, repeat) | |
1242 | char *prrompt; | |
1243 | int repeat; | |
1244 | { | |
1245 | static char *linebuffer = 0; | |
30875e1c | 1246 | static unsigned linelength = 0; |
bd5635a1 RP |
1247 | register char *p; |
1248 | char *p1; | |
1249 | char *rl; | |
1250 | char *local_prompt = prrompt; | |
1251 | register int c; | |
1252 | char *nline; | |
1253 | char got_eof = 0; | |
1254 | ||
1255 | if (linebuffer == 0) | |
1256 | { | |
1257 | linelength = 80; | |
1258 | linebuffer = (char *) xmalloc (linelength); | |
1259 | } | |
1260 | ||
1261 | p = linebuffer; | |
1262 | ||
1263 | /* Control-C quits instantly if typed while in this loop | |
1264 | since it should not wait until the user types a newline. */ | |
1265 | immediate_quit++; | |
1266 | #ifdef STOP_SIGNAL | |
1267 | signal (STOP_SIGNAL, stop_sig); | |
1268 | #endif | |
1269 | ||
1270 | while (1) | |
1271 | { | |
e522fb52 JG |
1272 | /* Reports are that some Sys V's don't flush stdout/err on reads |
1273 | from stdin, when stdin/out are sockets rather than ttys. So we | |
1274 | have to do it ourselves, to make emacs-gdb and xxgdb work. | |
1275 | On other machines, doing this once per input should be a cheap nop. */ | |
1276 | fflush (stdout); | |
1277 | fflush (stderr); | |
1278 | ||
bd5635a1 RP |
1279 | /* Don't use fancy stuff if not talking to stdin. */ |
1280 | if (command_editing_p && instream == stdin | |
1281 | && ISATTY (instream)) | |
1282 | rl = readline (local_prompt); | |
1283 | else | |
bdbd5f50 | 1284 | rl = gdb_readline (local_prompt); |
bd5635a1 RP |
1285 | |
1286 | if (!rl || rl == (char *) EOF) | |
1287 | { | |
1288 | got_eof = 1; | |
1289 | break; | |
1290 | } | |
1291 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) | |
1292 | { | |
1293 | linelength = strlen(rl) + 1 + (p - linebuffer); | |
1294 | nline = (char *) xrealloc (linebuffer, linelength); | |
1295 | p += nline - linebuffer; | |
1296 | linebuffer = nline; | |
1297 | } | |
1298 | p1 = rl; | |
1299 | /* Copy line. Don't copy null at end. (Leaves line alone | |
1300 | if this was just a newline) */ | |
1301 | while (*p1) | |
1302 | *p++ = *p1++; | |
1303 | ||
1304 | free (rl); /* Allocated in readline. */ | |
1305 | ||
1306 | if (p == linebuffer || *(p - 1) != '\\') | |
1307 | break; | |
1308 | ||
1309 | p--; /* Put on top of '\'. */ | |
1310 | local_prompt = (char *) 0; | |
1311 | } | |
1312 | ||
1313 | #ifdef STOP_SIGNAL | |
1314 | signal (SIGTSTP, SIG_DFL); | |
1315 | #endif | |
1316 | immediate_quit--; | |
1317 | ||
1318 | if (got_eof) | |
1319 | return NULL; | |
1320 | ||
1321 | /* Do history expansion if that is wished. */ | |
1322 | if (history_expansion_p && instream == stdin | |
1323 | && ISATTY (instream)) | |
1324 | { | |
1325 | char *history_value; | |
1326 | int expanded; | |
1327 | ||
1328 | *p = '\0'; /* Insert null now. */ | |
1329 | expanded = history_expand (linebuffer, &history_value); | |
1330 | if (expanded) | |
1331 | { | |
1332 | /* Print the changes. */ | |
1333 | printf ("%s\n", history_value); | |
1334 | ||
1335 | /* If there was an error, call this function again. */ | |
1336 | if (expanded < 0) | |
1337 | { | |
1338 | free (history_value); | |
1339 | return command_line_input (prrompt, repeat); | |
1340 | } | |
1341 | if (strlen (history_value) > linelength) | |
1342 | { | |
1343 | linelength = strlen (history_value) + 1; | |
1344 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
1345 | } | |
1346 | strcpy (linebuffer, history_value); | |
1347 | p = linebuffer + strlen(linebuffer); | |
1348 | free (history_value); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | /* If we just got an empty line, and that is supposed | |
1353 | to repeat the previous command, return the value in the | |
1354 | global buffer. */ | |
1355 | if (repeat) | |
1356 | { | |
1357 | if (p == linebuffer) | |
1358 | return line; | |
1359 | p1 = linebuffer; | |
1360 | while (*p1 == ' ' || *p1 == '\t') | |
1361 | p1++; | |
1362 | if (!*p1) | |
1363 | return line; | |
1364 | } | |
1365 | ||
1366 | *p = 0; | |
1367 | ||
1368 | /* Add line to history if appropriate. */ | |
1369 | if (instream == stdin | |
1370 | && ISATTY (stdin) && *linebuffer) | |
1371 | add_history (linebuffer); | |
1372 | ||
1373 | /* Note: lines consisting soley of comments are added to the command | |
1374 | history. This is useful when you type a command, and then | |
1375 | realize you don't want to execute it quite yet. You can comment | |
1376 | out the command and then later fetch it from the value history | |
1377 | and remove the '#'. The kill ring is probably better, but some | |
1378 | people are in the habit of commenting things out. */ | |
1379 | p1 = linebuffer; | |
1380 | while ((c = *p1++) != '\0') | |
1381 | { | |
1382 | if (c == '"') | |
1383 | while ((c = *p1++) != '"') | |
1384 | { | |
1385 | /* Make sure an escaped '"' doesn't make us think the string | |
1386 | is ended. */ | |
1387 | if (c == '\\') | |
1388 | parse_escape (&p1); | |
1389 | if (c == '\0') | |
1390 | break; | |
1391 | } | |
1392 | else if (c == '\'') | |
1393 | while ((c = *p1++) != '\'') | |
1394 | { | |
1395 | /* Make sure an escaped '\'' doesn't make us think the string | |
1396 | is ended. */ | |
1397 | if (c == '\\') | |
1398 | parse_escape (&p1); | |
1399 | if (c == '\0') | |
1400 | break; | |
1401 | } | |
1402 | else if (c == '#') | |
1403 | { | |
1404 | /* Found a comment. */ | |
1405 | p1[-1] = '\0'; | |
1406 | break; | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | /* Save into global buffer if appropriate. */ | |
1411 | if (repeat) | |
1412 | { | |
1413 | if (linelength > linesize) | |
1414 | { | |
1415 | line = xrealloc (line, linelength); | |
1416 | linesize = linelength; | |
1417 | } | |
1418 | strcpy (line, linebuffer); | |
1419 | return line; | |
1420 | } | |
1421 | ||
1422 | return linebuffer; | |
1423 | } | |
1424 | \f | |
1425 | /* Read lines from the input stream | |
1426 | and accumulate them in a chain of struct command_line's | |
1427 | which is then returned. */ | |
1428 | ||
1429 | struct command_line * | |
1430 | read_command_lines () | |
1431 | { | |
1432 | struct command_line *first = 0; | |
1433 | register struct command_line *next, *tail = 0; | |
1434 | register char *p, *p1; | |
1435 | struct cleanup *old_chain = 0; | |
1436 | ||
1437 | while (1) | |
1438 | { | |
1439 | dont_repeat (); | |
30875e1c | 1440 | p = command_line_input ((char *) NULL, instream == stdin); |
bd5635a1 RP |
1441 | if (p == NULL) |
1442 | /* Treat end of file like "end". */ | |
1443 | break; | |
1444 | ||
1445 | /* Remove leading and trailing blanks. */ | |
1446 | while (*p == ' ' || *p == '\t') p++; | |
1447 | p1 = p + strlen (p); | |
1448 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) p1--; | |
1449 | ||
1450 | /* Is this "end"? */ | |
1451 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
1452 | break; | |
1453 | ||
1454 | /* No => add this line to the chain of command lines. */ | |
1455 | next = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1456 | next->line = savestring (p, p1 - p); | |
1457 | next->next = 0; | |
1458 | if (tail) | |
1459 | { | |
1460 | tail->next = next; | |
1461 | } | |
1462 | else | |
1463 | { | |
1464 | /* We just read the first line. | |
1465 | From now on, arrange to throw away the lines we have | |
1466 | if we quit or get an error while inside this function. */ | |
1467 | first = next; | |
1468 | old_chain = make_cleanup (free_command_lines, &first); | |
1469 | } | |
1470 | tail = next; | |
1471 | } | |
1472 | ||
1473 | dont_repeat (); | |
1474 | ||
1475 | /* Now we are about to return the chain to our caller, | |
1476 | so freeing it becomes his responsibility. */ | |
1477 | if (first) | |
1478 | discard_cleanups (old_chain); | |
1479 | return first; | |
1480 | } | |
1481 | ||
1482 | /* Free a chain of struct command_line's. */ | |
1483 | ||
1484 | void | |
1485 | free_command_lines (lptr) | |
1486 | struct command_line **lptr; | |
1487 | { | |
1488 | register struct command_line *l = *lptr; | |
1489 | register struct command_line *next; | |
1490 | ||
1491 | while (l) | |
1492 | { | |
1493 | next = l->next; | |
1494 | free (l->line); | |
1495 | free (l); | |
1496 | l = next; | |
1497 | } | |
1498 | } | |
1499 | \f | |
1500 | /* Add an element to the list of info subcommands. */ | |
1501 | ||
1502 | void | |
1503 | add_info (name, fun, doc) | |
1504 | char *name; | |
30875e1c | 1505 | void (*fun) PARAMS ((char *, int)); |
bd5635a1 RP |
1506 | char *doc; |
1507 | { | |
1508 | add_cmd (name, no_class, fun, doc, &infolist); | |
1509 | } | |
1510 | ||
1511 | /* Add an alias to the list of info subcommands. */ | |
1512 | ||
1513 | void | |
1514 | add_info_alias (name, oldname, abbrev_flag) | |
1515 | char *name; | |
1516 | char *oldname; | |
1517 | int abbrev_flag; | |
1518 | { | |
1519 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); | |
1520 | } | |
1521 | ||
1522 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
1523 | Therefore, its own definition is called only for "info" with no args. */ | |
1524 | ||
1525 | /* ARGSUSED */ | |
1526 | static void | |
1527 | info_command (arg, from_tty) | |
1528 | char *arg; | |
1529 | int from_tty; | |
1530 | { | |
1531 | printf ("\"info\" must be followed by the name of an info command.\n"); | |
1532 | help_list (infolist, "info ", -1, stdout); | |
1533 | } | |
1534 | ||
1535 | /* The "show" command with no arguments shows all the settings. */ | |
1536 | ||
1537 | /* ARGSUSED */ | |
1538 | static void | |
1539 | show_command (arg, from_tty) | |
1540 | char *arg; | |
1541 | int from_tty; | |
1542 | { | |
1543 | cmd_show_list (showlist, from_tty, ""); | |
1544 | } | |
1545 | \f | |
1546 | /* Add an element to the list of commands. */ | |
1547 | ||
1548 | void | |
1549 | add_com (name, class, fun, doc) | |
1550 | char *name; | |
1551 | enum command_class class; | |
30875e1c | 1552 | void (*fun) PARAMS ((char *, int)); |
bd5635a1 RP |
1553 | char *doc; |
1554 | { | |
1555 | add_cmd (name, class, fun, doc, &cmdlist); | |
1556 | } | |
1557 | ||
1558 | /* Add an alias or abbreviation command to the list of commands. */ | |
1559 | ||
1560 | void | |
1561 | add_com_alias (name, oldname, class, abbrev_flag) | |
1562 | char *name; | |
1563 | char *oldname; | |
1564 | enum command_class class; | |
1565 | int abbrev_flag; | |
1566 | { | |
1567 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); | |
1568 | } | |
1569 | ||
1570 | void | |
1571 | error_no_arg (why) | |
1572 | char *why; | |
1573 | { | |
1574 | error ("Argument required (%s).", why); | |
1575 | } | |
1576 | ||
e1ce8aa5 | 1577 | /* ARGSUSED */ |
bd5635a1 RP |
1578 | static void |
1579 | help_command (command, from_tty) | |
1580 | char *command; | |
1581 | int from_tty; /* Ignored */ | |
1582 | { | |
1583 | help_cmd (command, stdout); | |
1584 | } | |
1585 | \f | |
1586 | static void | |
1587 | validate_comname (comname) | |
1588 | char *comname; | |
1589 | { | |
1590 | register char *p; | |
1591 | ||
1592 | if (comname == 0) | |
1593 | error_no_arg ("name of command to define"); | |
1594 | ||
1595 | p = comname; | |
1596 | while (*p) | |
1597 | { | |
c2e4669f | 1598 | if (!isalnum(*p) && *p != '-') |
bd5635a1 RP |
1599 | error ("Junk in argument list: \"%s\"", p); |
1600 | p++; | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | static void | |
1605 | define_command (comname, from_tty) | |
1606 | char *comname; | |
1607 | int from_tty; | |
1608 | { | |
1609 | register struct command_line *cmds; | |
1610 | register struct cmd_list_element *c, *newc; | |
1611 | char *tem = comname; | |
bd5635a1 RP |
1612 | |
1613 | validate_comname (comname); | |
1614 | ||
afe4ca15 | 1615 | /* Look it up, and verify that we got an exact match. */ |
bd5635a1 | 1616 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); |
afe4ca15 JG |
1617 | if (c && 0 != strcmp (comname, c->name)) |
1618 | c = 0; | |
1619 | ||
bd5635a1 RP |
1620 | if (c) |
1621 | { | |
1622 | if (c->class == class_user || c->class == class_alias) | |
1623 | tem = "Redefine command \"%s\"? "; | |
1624 | else | |
1625 | tem = "Really redefine built-in command \"%s\"? "; | |
c2e4669f JG |
1626 | if (!query (tem, c->name)) |
1627 | error ("Command \"%s\" not redefined.", c->name); | |
bd5635a1 RP |
1628 | } |
1629 | ||
c2e4669f JG |
1630 | comname = savestring (comname, strlen (comname)); |
1631 | ||
1632 | /* If the rest of the commands will be case insensetive, this one | |
1633 | should behave in the same manner. */ | |
1634 | for (tem = comname; *tem; tem++) | |
1635 | if (isupper(*tem)) *tem = tolower(*tem); | |
1636 | ||
bd5635a1 RP |
1637 | if (from_tty) |
1638 | { | |
1639 | printf ("Type commands for definition of \"%s\".\n\ | |
1640 | End with a line saying just \"end\".\n", comname); | |
1641 | fflush (stdout); | |
1642 | } | |
bd5635a1 RP |
1643 | |
1644 | cmds = read_command_lines (); | |
1645 | ||
1646 | if (c && c->class == class_user) | |
1647 | free_command_lines (&c->user_commands); | |
1648 | ||
1649 | newc = add_cmd (comname, class_user, not_just_help_class_command, | |
1650 | (c && c->class == class_user) | |
1651 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
1652 | newc->user_commands = cmds; | |
1653 | } | |
1654 | ||
1655 | static void | |
1656 | document_command (comname, from_tty) | |
1657 | char *comname; | |
1658 | int from_tty; | |
1659 | { | |
1660 | struct command_line *doclines; | |
1661 | register struct cmd_list_element *c; | |
1662 | char *tem = comname; | |
1663 | ||
1664 | validate_comname (comname); | |
1665 | ||
1666 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1667 | ||
1668 | if (c->class != class_user) | |
1669 | error ("Command \"%s\" is built-in.", comname); | |
1670 | ||
1671 | if (from_tty) | |
1672 | printf ("Type documentation for \"%s\".\n\ | |
1673 | End with a line saying just \"end\".\n", comname); | |
1674 | ||
1675 | doclines = read_command_lines (); | |
1676 | ||
1677 | if (c->doc) free (c->doc); | |
1678 | ||
1679 | { | |
1680 | register struct command_line *cl1; | |
1681 | register int len = 0; | |
1682 | ||
1683 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1684 | len += strlen (cl1->line) + 1; | |
1685 | ||
1686 | c->doc = (char *) xmalloc (len + 1); | |
1687 | *c->doc = 0; | |
1688 | ||
1689 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1690 | { | |
1691 | strcat (c->doc, cl1->line); | |
1692 | if (cl1->next) | |
1693 | strcat (c->doc, "\n"); | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | free_command_lines (&doclines); | |
1698 | } | |
1699 | \f | |
1700 | static void | |
81066208 | 1701 | print_gnu_advertisement() |
bd5635a1 | 1702 | { |
bd5635a1 | 1703 | printf ("\ |
bd5635a1 | 1704 | GDB is free software and you are welcome to distribute copies of it\n\ |
afe4ca15 JG |
1705 | under certain conditions; type \"show copying\" to see the conditions.\n\ |
1706 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ | |
81066208 JG |
1707 | "); |
1708 | } | |
1709 | ||
1710 | static void | |
1711 | print_gdb_version () | |
1712 | { | |
1713 | printf_filtered ("\ | |
ee0613d1 | 1714 | GDB %s, Copyright 1992 Free Software Foundation, Inc.", |
81066208 | 1715 | version); |
bd5635a1 RP |
1716 | } |
1717 | ||
e1ce8aa5 | 1718 | /* ARGSUSED */ |
bd5635a1 | 1719 | static void |
f266e564 | 1720 | show_version (args, from_tty) |
bd5635a1 RP |
1721 | char *args; |
1722 | int from_tty; | |
1723 | { | |
1724 | immediate_quit++; | |
81066208 JG |
1725 | print_gnu_advertisement (); |
1726 | print_gdb_version (); | |
1727 | printf_filtered ("\n"); | |
bd5635a1 RP |
1728 | immediate_quit--; |
1729 | } | |
1730 | \f | |
1731 | /* xgdb calls this to reprint the usual GDB prompt. */ | |
1732 | ||
1733 | void | |
1734 | print_prompt () | |
1735 | { | |
1736 | printf ("%s", prompt); | |
1737 | fflush (stdout); | |
1738 | } | |
1739 | \f | |
1740 | static void | |
1741 | quit_command (args, from_tty) | |
1742 | char *args; | |
1743 | int from_tty; | |
1744 | { | |
f266e564 | 1745 | if (inferior_pid != 0 && target_has_execution) |
bd5635a1 RP |
1746 | { |
1747 | if (query ("The program is running. Quit anyway? ")) | |
1748 | { | |
ee0613d1 | 1749 | target_kill (); |
bd5635a1 RP |
1750 | } |
1751 | else | |
1752 | error ("Not confirmed."); | |
1753 | } | |
1754 | /* Save the history information if it is appropriate to do so. */ | |
1755 | if (write_history_p && history_filename) | |
1756 | write_history (history_filename); | |
1757 | exit (0); | |
1758 | } | |
1759 | ||
ee0613d1 JG |
1760 | /* Returns whether GDB is running on a terminal and whether the user |
1761 | desires that questions be asked of them on that terminal. */ | |
1762 | ||
bd5635a1 RP |
1763 | int |
1764 | input_from_terminal_p () | |
1765 | { | |
ee0613d1 | 1766 | return gdb_has_a_terminal && (instream == stdin) & caution; |
bd5635a1 RP |
1767 | } |
1768 | \f | |
e1ce8aa5 | 1769 | /* ARGSUSED */ |
bd5635a1 RP |
1770 | static void |
1771 | pwd_command (args, from_tty) | |
1772 | char *args; | |
1773 | int from_tty; | |
1774 | { | |
1775 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); | |
f7402c04 | 1776 | getcwd (dirbuf, sizeof (dirbuf)); |
bd5635a1 RP |
1777 | |
1778 | if (strcmp (dirbuf, current_directory)) | |
1779 | printf ("Working directory %s\n (canonically %s).\n", | |
1780 | current_directory, dirbuf); | |
1781 | else | |
1782 | printf ("Working directory %s.\n", current_directory); | |
1783 | } | |
1784 | ||
1785 | static void | |
1786 | cd_command (dir, from_tty) | |
1787 | char *dir; | |
1788 | int from_tty; | |
1789 | { | |
1790 | int len; | |
1791 | int change; | |
1792 | ||
9107291d JK |
1793 | /* If the new directory is absolute, repeat is a no-op; if relative, |
1794 | repeat might be useful but is more likely to be a mistake. */ | |
1795 | dont_repeat (); | |
1796 | ||
bd5635a1 RP |
1797 | if (dir == 0) |
1798 | error_no_arg ("new working directory"); | |
1799 | ||
1800 | dir = tilde_expand (dir); | |
1801 | make_cleanup (free, dir); | |
1802 | ||
ee0613d1 JG |
1803 | if (chdir (dir) < 0) |
1804 | perror_with_name (dir); | |
1805 | ||
bd5635a1 RP |
1806 | len = strlen (dir); |
1807 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); | |
1808 | if (dir[0] == '/') | |
1809 | current_directory = dir; | |
1810 | else | |
1811 | { | |
7d9884b9 | 1812 | current_directory = concat (current_directory, "/", dir, NULL); |
bd5635a1 RP |
1813 | free (dir); |
1814 | } | |
1815 | ||
1816 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
1817 | ||
1818 | change = 1; | |
1819 | while (change) | |
1820 | { | |
1821 | char *p; | |
1822 | change = 0; | |
1823 | ||
1824 | for (p = current_directory; *p;) | |
1825 | { | |
1826 | if (!strncmp (p, "/./", 2) | |
1827 | && (p[2] == 0 || p[2] == '/')) | |
1828 | strcpy (p, p + 2); | |
1829 | else if (!strncmp (p, "/..", 3) | |
1830 | && (p[3] == 0 || p[3] == '/') | |
1831 | && p != current_directory) | |
1832 | { | |
1833 | char *q = p; | |
1834 | while (q != current_directory && q[-1] != '/') q--; | |
1835 | if (q != current_directory) | |
1836 | { | |
1837 | strcpy (q-1, p+3); | |
1838 | p = q-1; | |
1839 | } | |
1840 | } | |
1841 | else p++; | |
1842 | } | |
1843 | } | |
1844 | ||
bd5635a1 RP |
1845 | forget_cached_source_info (); |
1846 | ||
1847 | if (from_tty) | |
1848 | pwd_command ((char *) 0, 1); | |
1849 | } | |
1850 | \f | |
e1ce8aa5 | 1851 | /* ARGSUSED */ |
bd5635a1 RP |
1852 | static void |
1853 | source_command (args, from_tty) | |
1854 | char *args; | |
1855 | int from_tty; | |
1856 | { | |
1857 | FILE *stream; | |
1858 | struct cleanup *cleanups; | |
1859 | char *file = args; | |
1860 | ||
1861 | if (file == 0) | |
1862 | /* Let source without arguments read .gdbinit. */ | |
1863 | file = gdbinit; | |
1864 | ||
1865 | file = tilde_expand (file); | |
1866 | make_cleanup (free, file); | |
1867 | ||
1868 | stream = fopen (file, "r"); | |
1869 | if (stream == 0) | |
1870 | perror_with_name (file); | |
1871 | ||
1872 | cleanups = make_cleanup (fclose, stream); | |
1873 | ||
1874 | read_command_file (stream); | |
1875 | ||
1876 | do_cleanups (cleanups); | |
1877 | } | |
1878 | ||
1879 | /* ARGSUSED */ | |
1880 | static void | |
1881 | echo_command (text, from_tty) | |
1882 | char *text; | |
1883 | int from_tty; | |
1884 | { | |
1885 | char *p = text; | |
1886 | register int c; | |
1887 | ||
1888 | if (text) | |
1889 | while (c = *p++) | |
1890 | { | |
1891 | if (c == '\\') | |
1892 | { | |
1893 | /* \ at end of argument is used after spaces | |
1894 | so they won't be lost. */ | |
1895 | if (*p == 0) | |
1896 | return; | |
1897 | ||
1898 | c = parse_escape (&p); | |
1899 | if (c >= 0) | |
afe4ca15 | 1900 | printf_filtered ("%c", c); |
bd5635a1 RP |
1901 | } |
1902 | else | |
afe4ca15 | 1903 | printf_filtered ("%c", c); |
bd5635a1 | 1904 | } |
afe4ca15 JG |
1905 | |
1906 | /* Force this output to appear now. */ | |
1907 | wrap_here (""); | |
f266e564 | 1908 | fflush (stdout); |
bd5635a1 RP |
1909 | } |
1910 | ||
1911 | /* ARGSUSED */ | |
1912 | static void | |
1913 | dump_me_command (args, from_tty) | |
1914 | char *args; | |
1915 | int from_tty; | |
1916 | { | |
1917 | if (query ("Should GDB dump core? ")) | |
1918 | { | |
1919 | signal (SIGQUIT, SIG_DFL); | |
1920 | kill (getpid (), SIGQUIT); | |
1921 | } | |
1922 | } | |
1923 | \f | |
1924 | /* Functions to manipulate command line editing control variables. */ | |
1925 | ||
f266e564 | 1926 | /* Number of commands to print in each call to show_commands. */ |
bd5635a1 RP |
1927 | #define Hist_print 10 |
1928 | static void | |
f266e564 | 1929 | show_commands (args, from_tty) |
bd5635a1 RP |
1930 | char *args; |
1931 | int from_tty; | |
1932 | { | |
1933 | /* Index for history commands. Relative to history_base. */ | |
1934 | int offset; | |
1935 | ||
1936 | /* Number of the history entry which we are planning to display next. | |
1937 | Relative to history_base. */ | |
1938 | static int num = 0; | |
1939 | ||
1940 | /* The first command in the history which doesn't exist (i.e. one more | |
1941 | than the number of the last command). Relative to history_base. */ | |
1942 | int hist_len; | |
1943 | ||
30875e1c | 1944 | extern struct _hist_entry *history_get PARAMS ((int)); |
bd5635a1 RP |
1945 | extern int history_base; |
1946 | ||
bd5635a1 RP |
1947 | /* Print out some of the commands from the command history. */ |
1948 | /* First determine the length of the history list. */ | |
1949 | hist_len = history_size; | |
1950 | for (offset = 0; offset < history_size; offset++) | |
1951 | { | |
1952 | if (!history_get (history_base + offset)) | |
1953 | { | |
1954 | hist_len = offset; | |
1955 | break; | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | if (args) | |
1960 | { | |
1961 | if (args[0] == '+' && args[1] == '\0') | |
1962 | /* "info editing +" should print from the stored position. */ | |
1963 | ; | |
1964 | else | |
1965 | /* "info editing <exp>" should print around command number <exp>. */ | |
1966 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; | |
1967 | } | |
ee0613d1 | 1968 | /* "show commands" means print the last Hist_print commands. */ |
bd5635a1 RP |
1969 | else |
1970 | { | |
1971 | num = hist_len - Hist_print; | |
1972 | } | |
1973 | ||
1974 | if (num < 0) | |
1975 | num = 0; | |
1976 | ||
1977 | /* If there are at least Hist_print commands, we want to display the last | |
1978 | Hist_print rather than, say, the last 6. */ | |
1979 | if (hist_len - num < Hist_print) | |
1980 | { | |
1981 | num = hist_len - Hist_print; | |
1982 | if (num < 0) | |
1983 | num = 0; | |
1984 | } | |
1985 | ||
bd5635a1 RP |
1986 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) |
1987 | { | |
1988 | printf_filtered ("%5d %s\n", history_base + offset, | |
1989 | (history_get (history_base + offset))->line); | |
1990 | } | |
1991 | ||
1992 | /* The next command we want to display is the next one that we haven't | |
1993 | displayed yet. */ | |
1994 | num += Hist_print; | |
1995 | ||
1996 | /* If the user repeats this command with return, it should do what | |
ee0613d1 JG |
1997 | "show commands +" does. This is unnecessary if arg is null, |
1998 | because "show commands +" is not useful after "show commands". */ | |
bd5635a1 RP |
1999 | if (from_tty && args) |
2000 | { | |
2001 | args[0] = '+'; | |
2002 | args[1] = '\0'; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | /* Called by do_setshow_command. */ | |
e1ce8aa5 | 2007 | /* ARGSUSED */ |
bd5635a1 RP |
2008 | static void |
2009 | set_history_size_command (args, from_tty, c) | |
2010 | char *args; | |
2011 | int from_tty; | |
2012 | struct cmd_list_element *c; | |
2013 | { | |
2014 | if (history_size == UINT_MAX) | |
2015 | unstifle_history (); | |
c2e4669f | 2016 | else if (history_size >= 0) |
bd5635a1 | 2017 | stifle_history (history_size); |
c2e4669f JG |
2018 | else |
2019 | { | |
2020 | history_size = UINT_MAX; | |
2021 | error ("History size must be non-negative"); | |
2022 | } | |
bd5635a1 RP |
2023 | } |
2024 | ||
e1ce8aa5 | 2025 | /* ARGSUSED */ |
bd5635a1 RP |
2026 | static void |
2027 | set_history (args, from_tty) | |
2028 | char *args; | |
2029 | int from_tty; | |
2030 | { | |
2031 | printf ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
2032 | help_list (sethistlist, "set history ", -1, stdout); | |
2033 | } | |
2034 | ||
e1ce8aa5 | 2035 | /* ARGSUSED */ |
bd5635a1 RP |
2036 | static void |
2037 | show_history (args, from_tty) | |
2038 | char *args; | |
2039 | int from_tty; | |
2040 | { | |
f266e564 | 2041 | cmd_show_list (showhistlist, from_tty, ""); |
bd5635a1 RP |
2042 | } |
2043 | ||
2044 | int info_verbose = 0; /* Default verbose msgs off */ | |
2045 | ||
2046 | /* Called by do_setshow_command. An elaborate joke. */ | |
e1ce8aa5 | 2047 | /* ARGSUSED */ |
bd5635a1 RP |
2048 | static void |
2049 | set_verbose (args, from_tty, c) | |
2050 | char *args; | |
2051 | int from_tty; | |
2052 | struct cmd_list_element *c; | |
2053 | { | |
2054 | char *cmdname = "verbose"; | |
2055 | struct cmd_list_element *showcmd; | |
2056 | ||
2057 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); | |
2058 | ||
2059 | if (info_verbose) | |
2060 | { | |
2061 | c->doc = "Set verbose printing of informational messages."; | |
2062 | showcmd->doc = "Show verbose printing of informational messages."; | |
2063 | } | |
2064 | else | |
2065 | { | |
2066 | c->doc = "Set verbosity."; | |
2067 | showcmd->doc = "Show verbosity."; | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | static void | |
30875e1c SG |
2072 | float_handler (signo) |
2073 | int signo; | |
bd5635a1 RP |
2074 | { |
2075 | /* This message is based on ANSI C, section 4.7. Note that integer | |
2076 | divide by zero causes this, so "float" is a misnomer. */ | |
2077 | error ("Erroneous arithmetic operation."); | |
2078 | } | |
2079 | ||
2080 | /* Return whether we are running a batch file or from terminal. */ | |
2081 | int | |
2082 | batch_mode () | |
2083 | { | |
2084 | return !(instream == stdin && ISATTY (stdin)); | |
2085 | } | |
2086 | ||
2087 | \f | |
2088 | static void | |
2089 | initialize_cmd_lists () | |
2090 | { | |
2091 | cmdlist = (struct cmd_list_element *) 0; | |
2092 | infolist = (struct cmd_list_element *) 0; | |
2093 | enablelist = (struct cmd_list_element *) 0; | |
2094 | disablelist = (struct cmd_list_element *) 0; | |
2095 | deletelist = (struct cmd_list_element *) 0; | |
2096 | enablebreaklist = (struct cmd_list_element *) 0; | |
2097 | setlist = (struct cmd_list_element *) 0; | |
2098 | showlist = NULL; | |
2099 | sethistlist = (struct cmd_list_element *) 0; | |
2100 | showhistlist = NULL; | |
2101 | unsethistlist = (struct cmd_list_element *) 0; | |
2102 | } | |
2103 | ||
8b3c897a SG |
2104 | /* Init the history buffer. Note that we are called after the init file(s) |
2105 | * have been read so that the user can change the history file via his | |
2106 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
2107 | * overrides all of this. | |
2108 | */ | |
2109 | ||
bd5635a1 | 2110 | static void |
8b3c897a | 2111 | initialize_history() |
bd5635a1 | 2112 | { |
bd5635a1 | 2113 | char *tmpenv; |
bd5635a1 | 2114 | |
318bf84f FF |
2115 | tmpenv = getenv ("HISTSIZE"); |
2116 | if (tmpenv) | |
bd5635a1 | 2117 | history_size = atoi (tmpenv); |
8b3c897a | 2118 | else if (!history_size) |
bd5635a1 RP |
2119 | history_size = 256; |
2120 | ||
2121 | stifle_history (history_size); | |
2122 | ||
318bf84f FF |
2123 | tmpenv = getenv ("GDBHISTFILE"); |
2124 | if (tmpenv) | |
bd5635a1 | 2125 | history_filename = savestring (tmpenv, strlen(tmpenv)); |
8b3c897a | 2126 | else if (!history_filename) { |
bd5635a1 RP |
2127 | /* We include the current directory so that if the user changes |
2128 | directories the file written will be the same as the one | |
2129 | that was read. */ | |
7d9884b9 | 2130 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
8b3c897a | 2131 | } |
bd5635a1 | 2132 | read_history (history_filename); |
8b3c897a | 2133 | } |
bd5635a1 | 2134 | |
8b3c897a SG |
2135 | static void |
2136 | initialize_main () | |
2137 | { | |
2138 | struct cmd_list_element *c; | |
2139 | ||
2140 | #ifdef DEFAULT_PROMPT | |
2141 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); | |
2142 | #else | |
2143 | prompt = savestring ("(gdb) ", 6); | |
2144 | #endif | |
2145 | ||
2146 | /* Set the important stuff up for command editing. */ | |
2147 | command_editing_p = 1; | |
2148 | history_expansion_p = 0; | |
2149 | write_history_p = 0; | |
2150 | ||
bd5635a1 RP |
2151 | /* Setup important stuff for command line editing. */ |
2152 | rl_completion_entry_function = (int (*)()) symbol_completion_function; | |
2153 | rl_completer_word_break_characters = gdb_completer_word_break_characters; | |
2154 | rl_readline_name = "gdb"; | |
2155 | ||
2156 | /* Define the classes of commands. | |
2157 | They will appear in the help list in the reverse of this order. */ | |
2158 | ||
2159 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); | |
2160 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); | |
2161 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ | |
2162 | The commands in this class are those defined by the user.\n\ | |
2163 | Use the \"define\" command to define a command.", &cmdlist); | |
2164 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); | |
2165 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); | |
2166 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); | |
2167 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); | |
2168 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); | |
2169 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ | |
2170 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
2171 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
2172 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
2173 | Variable lookups are done with respect to the selected frame.\n\ | |
2174 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
2175 | The commands below can be used to select other frames by number or address.", | |
2176 | &cmdlist); | |
2177 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); | |
2178 | ||
2179 | add_com ("pwd", class_files, pwd_command, | |
2180 | "Print working directory. This is used for your program as well."); | |
2181 | add_com ("cd", class_files, cd_command, | |
2182 | "Set working directory to DIR for debugger and program being debugged.\n\ | |
2183 | The change does not take effect for the program being debugged\n\ | |
2184 | until the next time it is started."); | |
2185 | ||
2186 | add_show_from_set | |
2187 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, | |
2188 | "Set gdb's prompt", | |
2189 | &setlist), | |
2190 | &showlist); | |
2191 | ||
2192 | add_com ("echo", class_support, echo_command, | |
2193 | "Print a constant string. Give string as argument.\n\ | |
2194 | C escape sequences may be used in the argument.\n\ | |
2195 | No newline is added at the end of the argument;\n\ | |
2196 | use \"\\n\" if you want a newline to be printed.\n\ | |
2197 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
2198 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
2199 | to be printed or after trailing whitespace."); | |
2200 | add_com ("document", class_support, document_command, | |
2201 | "Document a user-defined command.\n\ | |
2202 | Give command name as argument. Give documentation on following lines.\n\ | |
2203 | End with a line of just \"end\"."); | |
2204 | add_com ("define", class_support, define_command, | |
2205 | "Define a new command name. Command name is argument.\n\ | |
2206 | Definition appears on following lines, one command per line.\n\ | |
2207 | End with a line of just \"end\".\n\ | |
2208 | Use the \"document\" command to give documentation for the new command.\n\ | |
2209 | Commands defined in this way do not take arguments."); | |
2210 | ||
2211 | #ifdef __STDC__ | |
2212 | add_com ("source", class_support, source_command, | |
2213 | "Read commands from a file named FILE.\n\ | |
2214 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ | |
2215 | when gdb is started."); | |
2216 | #else | |
2217 | /* Punt file name, we can't help it easily. */ | |
2218 | add_com ("source", class_support, source_command, | |
2219 | "Read commands from a file named FILE.\n\ | |
2220 | Note that the file \".gdbinit\" is read automatically in this way\n\ | |
2221 | when gdb is started."); | |
2222 | #endif | |
2223 | ||
2224 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
2225 | add_com ("help", class_support, help_command, "Print list of commands."); | |
2226 | add_com_alias ("q", "quit", class_support, 1); | |
2227 | add_com_alias ("h", "help", class_support, 1); | |
2228 | ||
2229 | ||
2230 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, | |
2231 | "Set ", | |
2232 | &setlist), | |
2233 | add_show_from_set (c, &showlist); | |
30875e1c | 2234 | c->function.sfunc = set_verbose; |
bd5635a1 RP |
2235 | set_verbose (NULL, 0, c); |
2236 | ||
2237 | add_com ("dump-me", class_obscure, dump_me_command, | |
2238 | "Get fatal error; make debugger dump its core."); | |
2239 | ||
2240 | add_show_from_set | |
2241 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, | |
ee0613d1 | 2242 | "Set editing of command lines as they are typed.\n\ |
bd5635a1 | 2243 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ |
ee0613d1 JG |
2244 | Without an argument, command line editing is enabled. To edit, use\n\ |
2245 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), | |
bd5635a1 RP |
2246 | &showlist); |
2247 | ||
2248 | add_prefix_cmd ("history", class_support, set_history, | |
2249 | "Generic command for setting command history parameters.", | |
2250 | &sethistlist, "set history ", 0, &setlist); | |
2251 | add_prefix_cmd ("history", class_support, show_history, | |
2252 | "Generic command for showing command history parameters.", | |
2253 | &showhistlist, "show history ", 0, &showlist); | |
2254 | ||
2255 | add_show_from_set | |
2256 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, | |
2257 | "Set history expansion on command input.\n\ | |
2258 | Without an argument, history expansion is enabled.", &sethistlist), | |
2259 | &showhistlist); | |
2260 | ||
2261 | add_show_from_set | |
f266e564 | 2262 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, |
bd5635a1 RP |
2263 | "Set saving of the history record on exit.\n\ |
2264 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ | |
2265 | Without an argument, saving is enabled.", &sethistlist), | |
2266 | &showhistlist); | |
2267 | ||
2268 | c = add_set_cmd ("size", no_class, var_uinteger, (char *)&history_size, | |
2269 | "Set the size of the command history, \n\ | |
2270 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
2271 | add_show_from_set (c, &showhistlist); | |
30875e1c | 2272 | c->function.sfunc = set_history_size_command; |
bd5635a1 RP |
2273 | |
2274 | add_show_from_set | |
2275 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, | |
2276 | "Set the filename in which to record the command history\n\ | |
2277 | (the list of previous commands of which a record is kept).", &sethistlist), | |
2278 | &showhistlist); | |
2279 | ||
2280 | add_show_from_set | |
f266e564 | 2281 | (add_set_cmd ("confirm", class_support, var_boolean, |
bd5635a1 | 2282 | (char *)&caution, |
f266e564 JK |
2283 | "Set whether to confirm potentially dangerous operations.", |
2284 | &setlist), | |
bd5635a1 RP |
2285 | &showlist); |
2286 | ||
2287 | add_prefix_cmd ("info", class_info, info_command, | |
ee0613d1 | 2288 | "Generic command for showing things about the program being debugged.", |
bd5635a1 RP |
2289 | &infolist, "info ", 0, &cmdlist); |
2290 | add_com_alias ("i", "info", class_info, 1); | |
2291 | ||
2292 | add_prefix_cmd ("show", class_info, show_command, | |
ee0613d1 | 2293 | "Generic command for showing things about the debugger.", |
bd5635a1 RP |
2294 | &showlist, "show ", 0, &cmdlist); |
2295 | /* Another way to get at the same thing. */ | |
2296 | add_info ("set", show_command, "Show all GDB settings."); | |
2297 | ||
ee0613d1 JG |
2298 | add_cmd ("commands", no_class, show_commands, |
2299 | "Show the the history of commands you typed.\n\ | |
2300 | You can supply a command number to start with, or a `+' to start after\n\ | |
2301 | the previous command number shown.", | |
f266e564 | 2302 | &showlist); |
bd5635a1 | 2303 | |
f266e564 | 2304 | add_cmd ("version", no_class, show_version, |
ee0613d1 | 2305 | "Show what version of GDB this is.", &showlist); |
bd5635a1 | 2306 | } |