| 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 | } |