| 1 | /* Handle lists of commands, their decoding and documentation, for GDB. |
| 2 | Copyright 1986, 1989, 1990, 1991, 1998 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #include "defs.h" |
| 19 | #include "gdbcmd.h" |
| 20 | #include "symtab.h" |
| 21 | #include "value.h" |
| 22 | #include <ctype.h> |
| 23 | #include "gdb_string.h" |
| 24 | #ifdef HAVE_UNISTD_H |
| 25 | #include <unistd.h> |
| 26 | #endif |
| 27 | |
| 28 | #ifdef HAVE_WAIT_H |
| 29 | # include <wait.h> |
| 30 | #else |
| 31 | # ifdef HAVE_SYS_WAIT_H |
| 32 | # include <sys/wait.h> |
| 33 | # endif |
| 34 | #endif |
| 35 | |
| 36 | #include "wait.h" |
| 37 | |
| 38 | /* Prototypes for local functions */ |
| 39 | |
| 40 | static void undef_cmd_error PARAMS ((char *, char *)); |
| 41 | |
| 42 | static void show_user PARAMS ((char *, int)); |
| 43 | |
| 44 | static void show_user_1 PARAMS ((struct cmd_list_element *, GDB_FILE *)); |
| 45 | |
| 46 | static void make_command PARAMS ((char *, int)); |
| 47 | |
| 48 | static void shell_escape PARAMS ((char *, int)); |
| 49 | |
| 50 | static int parse_binary_operation PARAMS ((char *)); |
| 51 | |
| 52 | static void print_doc_line PARAMS ((GDB_FILE *, char *)); |
| 53 | |
| 54 | void _initialize_command PARAMS ((void)); |
| 55 | |
| 56 | /* Add element named NAME. |
| 57 | CLASS is the top level category into which commands are broken down |
| 58 | for "help" purposes. |
| 59 | FUN should be the function to execute the command; |
| 60 | it will get a character string as argument, with leading |
| 61 | and trailing blanks already eliminated. |
| 62 | |
| 63 | DOC is a documentation string for the command. |
| 64 | Its first line should be a complete sentence. |
| 65 | It should start with ? for a command that is an abbreviation |
| 66 | or with * for a command that most users don't need to know about. |
| 67 | |
| 68 | Add this command to command list *LIST. |
| 69 | |
| 70 | Returns a pointer to the added command (not necessarily the head |
| 71 | of *LIST). */ |
| 72 | |
| 73 | struct cmd_list_element * |
| 74 | add_cmd (name, class, fun, doc, list) |
| 75 | char *name; |
| 76 | enum command_class class; |
| 77 | void (*fun) PARAMS ((char *, int)); |
| 78 | char *doc; |
| 79 | struct cmd_list_element **list; |
| 80 | { |
| 81 | register struct cmd_list_element *c |
| 82 | = (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element)); |
| 83 | struct cmd_list_element *p; |
| 84 | |
| 85 | delete_cmd (name, list); |
| 86 | |
| 87 | if (*list == NULL || STRCMP ((*list)->name, name) >= 0) |
| 88 | { |
| 89 | c->next = *list; |
| 90 | *list = c; |
| 91 | } |
| 92 | else |
| 93 | { |
| 94 | p = *list; |
| 95 | while (p->next && STRCMP (p->next->name, name) <= 0) |
| 96 | { |
| 97 | p = p->next; |
| 98 | } |
| 99 | c->next = p->next; |
| 100 | p->next = c; |
| 101 | } |
| 102 | |
| 103 | c->name = name; |
| 104 | c->class = class; |
| 105 | c->function.cfunc = fun; |
| 106 | c->doc = doc; |
| 107 | c->hook = NULL; |
| 108 | c->prefixlist = NULL; |
| 109 | c->prefixname = NULL; |
| 110 | c->allow_unknown = 0; |
| 111 | c->abbrev_flag = 0; |
| 112 | c->completer = make_symbol_completion_list; |
| 113 | c->type = not_set_cmd; |
| 114 | c->var = NULL; |
| 115 | c->var_type = var_boolean; |
| 116 | c->enums = NULL; |
| 117 | c->user_commands = NULL; |
| 118 | c->hookee = NULL; |
| 119 | c->cmd_pointer = NULL; |
| 120 | |
| 121 | return c; |
| 122 | } |
| 123 | |
| 124 | /* Same as above, except that the abbrev_flag is set. */ |
| 125 | |
| 126 | #if 0 /* Currently unused */ |
| 127 | |
| 128 | struct cmd_list_element * |
| 129 | add_abbrev_cmd (name, class, fun, doc, list) |
| 130 | char *name; |
| 131 | enum command_class class; |
| 132 | void (*fun) PARAMS ((char *, int)); |
| 133 | char *doc; |
| 134 | struct cmd_list_element **list; |
| 135 | { |
| 136 | register struct cmd_list_element *c |
| 137 | = add_cmd (name, class, fun, doc, list); |
| 138 | |
| 139 | c->abbrev_flag = 1; |
| 140 | return c; |
| 141 | } |
| 142 | |
| 143 | #endif |
| 144 | |
| 145 | struct cmd_list_element * |
| 146 | add_alias_cmd (name, oldname, class, abbrev_flag, list) |
| 147 | char *name; |
| 148 | char *oldname; |
| 149 | enum command_class class; |
| 150 | int abbrev_flag; |
| 151 | struct cmd_list_element **list; |
| 152 | { |
| 153 | /* Must do this since lookup_cmd tries to side-effect its first arg */ |
| 154 | char *copied_name; |
| 155 | register struct cmd_list_element *old; |
| 156 | register struct cmd_list_element *c; |
| 157 | copied_name = (char *) alloca (strlen (oldname) + 1); |
| 158 | strcpy (copied_name, oldname); |
| 159 | old = lookup_cmd (&copied_name, *list, "", 1, 1); |
| 160 | |
| 161 | if (old == 0) |
| 162 | { |
| 163 | delete_cmd (name, list); |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | c = add_cmd (name, class, old->function.cfunc, old->doc, list); |
| 168 | c->prefixlist = old->prefixlist; |
| 169 | c->prefixname = old->prefixname; |
| 170 | c->allow_unknown = old->allow_unknown; |
| 171 | c->abbrev_flag = abbrev_flag; |
| 172 | c->cmd_pointer = old; |
| 173 | return c; |
| 174 | } |
| 175 | |
| 176 | /* Like add_cmd but adds an element for a command prefix: |
| 177 | a name that should be followed by a subcommand to be looked up |
| 178 | in another command list. PREFIXLIST should be the address |
| 179 | of the variable containing that list. */ |
| 180 | |
| 181 | struct cmd_list_element * |
| 182 | add_prefix_cmd (name, class, fun, doc, prefixlist, prefixname, |
| 183 | allow_unknown, list) |
| 184 | char *name; |
| 185 | enum command_class class; |
| 186 | void (*fun) PARAMS ((char *, int)); |
| 187 | char *doc; |
| 188 | struct cmd_list_element **prefixlist; |
| 189 | char *prefixname; |
| 190 | int allow_unknown; |
| 191 | struct cmd_list_element **list; |
| 192 | { |
| 193 | register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list); |
| 194 | c->prefixlist = prefixlist; |
| 195 | c->prefixname = prefixname; |
| 196 | c->allow_unknown = allow_unknown; |
| 197 | return c; |
| 198 | } |
| 199 | |
| 200 | /* Like add_prefix_cmd but sets the abbrev_flag on the new command. */ |
| 201 | |
| 202 | struct cmd_list_element * |
| 203 | add_abbrev_prefix_cmd (name, class, fun, doc, prefixlist, prefixname, |
| 204 | allow_unknown, list) |
| 205 | char *name; |
| 206 | enum command_class class; |
| 207 | void (*fun) PARAMS ((char *, int)); |
| 208 | char *doc; |
| 209 | struct cmd_list_element **prefixlist; |
| 210 | char *prefixname; |
| 211 | int allow_unknown; |
| 212 | struct cmd_list_element **list; |
| 213 | { |
| 214 | register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list); |
| 215 | c->prefixlist = prefixlist; |
| 216 | c->prefixname = prefixname; |
| 217 | c->allow_unknown = allow_unknown; |
| 218 | c->abbrev_flag = 1; |
| 219 | return c; |
| 220 | } |
| 221 | |
| 222 | /* This is an empty "cfunc". */ |
| 223 | void |
| 224 | not_just_help_class_command (args, from_tty) |
| 225 | char *args; |
| 226 | int from_tty; |
| 227 | { |
| 228 | } |
| 229 | |
| 230 | /* This is an empty "sfunc". */ |
| 231 | static void empty_sfunc PARAMS ((char *, int, struct cmd_list_element *)); |
| 232 | |
| 233 | static void |
| 234 | empty_sfunc (args, from_tty, c) |
| 235 | char *args; |
| 236 | int from_tty; |
| 237 | struct cmd_list_element *c; |
| 238 | { |
| 239 | } |
| 240 | |
| 241 | /* Add element named NAME to command list LIST (the list for set |
| 242 | or some sublist thereof). |
| 243 | CLASS is as in add_cmd. |
| 244 | VAR_TYPE is the kind of thing we are setting. |
| 245 | VAR is address of the variable being controlled by this command. |
| 246 | DOC is the documentation string. */ |
| 247 | |
| 248 | struct cmd_list_element * |
| 249 | add_set_cmd (name, class, var_type, var, doc, list) |
| 250 | char *name; |
| 251 | enum command_class class; |
| 252 | var_types var_type; |
| 253 | char *var; |
| 254 | char *doc; |
| 255 | struct cmd_list_element **list; |
| 256 | { |
| 257 | struct cmd_list_element *c |
| 258 | = add_cmd (name, class, NO_FUNCTION, doc, list); |
| 259 | |
| 260 | c->type = set_cmd; |
| 261 | c->var_type = var_type; |
| 262 | c->var = var; |
| 263 | /* This needs to be something besides NO_FUNCTION so that this isn't |
| 264 | treated as a help class. */ |
| 265 | c->function.sfunc = empty_sfunc; |
| 266 | return c; |
| 267 | } |
| 268 | |
| 269 | /* Add element named NAME to command list LIST (the list for set |
| 270 | or some sublist thereof). |
| 271 | CLASS is as in add_cmd. |
| 272 | ENUMLIST is a list of strings which may follow NAME. |
| 273 | VAR is address of the variable which will contain the matching string |
| 274 | (from ENUMLIST). |
| 275 | DOC is the documentation string. */ |
| 276 | |
| 277 | struct cmd_list_element * |
| 278 | add_set_enum_cmd (name, class, enumlist, var, doc, list) |
| 279 | char *name; |
| 280 | enum command_class class; |
| 281 | char *enumlist[]; |
| 282 | char *var; |
| 283 | char *doc; |
| 284 | struct cmd_list_element **list; |
| 285 | { |
| 286 | struct cmd_list_element *c |
| 287 | = add_set_cmd (name, class, var_enum, var, doc, list); |
| 288 | c->enums = enumlist; |
| 289 | |
| 290 | return c; |
| 291 | } |
| 292 | |
| 293 | /* Where SETCMD has already been added, add the corresponding show |
| 294 | command to LIST and return a pointer to the added command (not |
| 295 | necessarily the head of LIST). */ |
| 296 | struct cmd_list_element * |
| 297 | add_show_from_set (setcmd, list) |
| 298 | struct cmd_list_element *setcmd; |
| 299 | struct cmd_list_element **list; |
| 300 | { |
| 301 | struct cmd_list_element *showcmd = |
| 302 | (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element)); |
| 303 | struct cmd_list_element *p; |
| 304 | |
| 305 | memcpy (showcmd, setcmd, sizeof (struct cmd_list_element)); |
| 306 | delete_cmd (showcmd->name, list); |
| 307 | showcmd->type = show_cmd; |
| 308 | |
| 309 | /* Replace "set " at start of docstring with "show ". */ |
| 310 | if (setcmd->doc[0] == 'S' && setcmd->doc[1] == 'e' |
| 311 | && setcmd->doc[2] == 't' && setcmd->doc[3] == ' ') |
| 312 | showcmd->doc = concat ("Show ", setcmd->doc + 4, NULL); |
| 313 | else |
| 314 | fprintf_unfiltered (gdb_stderr, "GDB internal error: Bad docstring for set command\n"); |
| 315 | |
| 316 | if (*list == NULL || STRCMP ((*list)->name, showcmd->name) >= 0) |
| 317 | { |
| 318 | showcmd->next = *list; |
| 319 | *list = showcmd; |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | p = *list; |
| 324 | while (p->next && STRCMP (p->next->name, showcmd->name) <= 0) |
| 325 | { |
| 326 | p = p->next; |
| 327 | } |
| 328 | showcmd->next = p->next; |
| 329 | p->next = showcmd; |
| 330 | } |
| 331 | |
| 332 | return showcmd; |
| 333 | } |
| 334 | |
| 335 | /* Remove the command named NAME from the command list. */ |
| 336 | |
| 337 | void |
| 338 | delete_cmd (name, list) |
| 339 | char *name; |
| 340 | struct cmd_list_element **list; |
| 341 | { |
| 342 | register struct cmd_list_element *c; |
| 343 | struct cmd_list_element *p; |
| 344 | |
| 345 | while (*list && STREQ ((*list)->name, name)) |
| 346 | { |
| 347 | if ((*list)->hookee) |
| 348 | (*list)->hookee->hook = 0; /* Hook slips out of its mouth */ |
| 349 | p = (*list)->next; |
| 350 | free ((PTR)*list); |
| 351 | *list = p; |
| 352 | } |
| 353 | |
| 354 | if (*list) |
| 355 | for (c = *list; c->next;) |
| 356 | { |
| 357 | if (STREQ (c->next->name, name)) |
| 358 | { |
| 359 | if (c->next->hookee) |
| 360 | c->next->hookee->hook = 0; /* hooked cmd gets away. */ |
| 361 | p = c->next->next; |
| 362 | free ((PTR)c->next); |
| 363 | c->next = p; |
| 364 | } |
| 365 | else |
| 366 | c = c->next; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | /* This command really has to deal with two things: |
| 371 | * 1) I want documentation on *this string* (usually called by |
| 372 | * "help commandname"). |
| 373 | * 2) I want documentation on *this list* (usually called by |
| 374 | * giving a command that requires subcommands. Also called by saying |
| 375 | * just "help".) |
| 376 | * |
| 377 | * I am going to split this into two seperate comamnds, help_cmd and |
| 378 | * help_list. |
| 379 | */ |
| 380 | |
| 381 | void |
| 382 | help_cmd (command, stream) |
| 383 | char *command; |
| 384 | GDB_FILE *stream; |
| 385 | { |
| 386 | struct cmd_list_element *c; |
| 387 | extern struct cmd_list_element *cmdlist; |
| 388 | |
| 389 | if (!command) |
| 390 | { |
| 391 | help_list (cmdlist, "", all_classes, stream); |
| 392 | return; |
| 393 | } |
| 394 | |
| 395 | c = lookup_cmd (&command, cmdlist, "", 0, 0); |
| 396 | |
| 397 | if (c == 0) |
| 398 | return; |
| 399 | |
| 400 | /* There are three cases here. |
| 401 | If c->prefixlist is nonzero, we have a prefix command. |
| 402 | Print its documentation, then list its subcommands. |
| 403 | |
| 404 | If c->function is nonzero, we really have a command. |
| 405 | Print its documentation and return. |
| 406 | |
| 407 | If c->function is zero, we have a class name. |
| 408 | Print its documentation (as if it were a command) |
| 409 | and then set class to the number of this class |
| 410 | so that the commands in the class will be listed. */ |
| 411 | |
| 412 | fputs_filtered (c->doc, stream); |
| 413 | fputs_filtered ("\n", stream); |
| 414 | |
| 415 | if (c->prefixlist == 0 && c->function.cfunc != NULL) |
| 416 | return; |
| 417 | fprintf_filtered (stream, "\n"); |
| 418 | |
| 419 | /* If this is a prefix command, print it's subcommands */ |
| 420 | if (c->prefixlist) |
| 421 | help_list (*c->prefixlist, c->prefixname, all_commands, stream); |
| 422 | |
| 423 | /* If this is a class name, print all of the commands in the class */ |
| 424 | if (c->function.cfunc == NULL) |
| 425 | help_list (cmdlist, "", c->class, stream); |
| 426 | |
| 427 | if (c->hook) |
| 428 | fprintf_filtered (stream, "\nThis command has a hook defined: %s\n", |
| 429 | c->hook->name); |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * Get a specific kind of help on a command list. |
| 434 | * |
| 435 | * LIST is the list. |
| 436 | * CMDTYPE is the prefix to use in the title string. |
| 437 | * CLASS is the class with which to list the nodes of this list (see |
| 438 | * documentation for help_cmd_list below), As usual, ALL_COMMANDS for |
| 439 | * everything, ALL_CLASSES for just classes, and non-negative for only things |
| 440 | * in a specific class. |
| 441 | * and STREAM is the output stream on which to print things. |
| 442 | * If you call this routine with a class >= 0, it recurses. |
| 443 | */ |
| 444 | void |
| 445 | help_list (list, cmdtype, class, stream) |
| 446 | struct cmd_list_element *list; |
| 447 | char *cmdtype; |
| 448 | enum command_class class; |
| 449 | GDB_FILE *stream; |
| 450 | { |
| 451 | int len; |
| 452 | char *cmdtype1, *cmdtype2; |
| 453 | |
| 454 | /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */ |
| 455 | len = strlen (cmdtype); |
| 456 | cmdtype1 = (char *) alloca (len + 1); |
| 457 | cmdtype1[0] = 0; |
| 458 | cmdtype2 = (char *) alloca (len + 4); |
| 459 | cmdtype2[0] = 0; |
| 460 | if (len) |
| 461 | { |
| 462 | cmdtype1[0] = ' '; |
| 463 | strncpy (cmdtype1 + 1, cmdtype, len - 1); |
| 464 | cmdtype1[len] = 0; |
| 465 | strncpy (cmdtype2, cmdtype, len - 1); |
| 466 | strcpy (cmdtype2 + len - 1, " sub"); |
| 467 | } |
| 468 | |
| 469 | if (class == all_classes) |
| 470 | fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2); |
| 471 | else |
| 472 | fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2); |
| 473 | |
| 474 | help_cmd_list (list, class, cmdtype, (int)class >= 0, stream); |
| 475 | |
| 476 | if (class == all_classes) |
| 477 | fprintf_filtered (stream, "\n\ |
| 478 | Type \"help%s\" followed by a class name for a list of commands in that class.", |
| 479 | cmdtype1); |
| 480 | |
| 481 | fprintf_filtered (stream, "\n\ |
| 482 | Type \"help%s\" followed by %scommand name for full documentation.\n\ |
| 483 | Command name abbreviations are allowed if unambiguous.\n", |
| 484 | cmdtype1, cmdtype2); |
| 485 | } |
| 486 | |
| 487 | /* Print only the first line of STR on STREAM. */ |
| 488 | static void |
| 489 | print_doc_line (stream, str) |
| 490 | GDB_FILE *stream; |
| 491 | char *str; |
| 492 | { |
| 493 | static char *line_buffer = 0; |
| 494 | static int line_size; |
| 495 | register char *p; |
| 496 | |
| 497 | if (!line_buffer) |
| 498 | { |
| 499 | line_size = 80; |
| 500 | line_buffer = (char *) xmalloc (line_size); |
| 501 | } |
| 502 | |
| 503 | p = str; |
| 504 | while (*p && *p != '\n' && *p != '.' && *p != ',') |
| 505 | p++; |
| 506 | if (p - str > line_size - 1) |
| 507 | { |
| 508 | line_size = p - str + 1; |
| 509 | free ((PTR)line_buffer); |
| 510 | line_buffer = (char *) xmalloc (line_size); |
| 511 | } |
| 512 | strncpy (line_buffer, str, p - str); |
| 513 | line_buffer[p - str] = '\0'; |
| 514 | if (islower (line_buffer[0])) |
| 515 | line_buffer[0] = toupper (line_buffer[0]); |
| 516 | fputs_filtered (line_buffer, stream); |
| 517 | } |
| 518 | |
| 519 | /* |
| 520 | * Implement a help command on command list LIST. |
| 521 | * RECURSE should be non-zero if this should be done recursively on |
| 522 | * all sublists of LIST. |
| 523 | * PREFIX is the prefix to print before each command name. |
| 524 | * STREAM is the stream upon which the output should be written. |
| 525 | * CLASS should be: |
| 526 | * A non-negative class number to list only commands in that |
| 527 | * class. |
| 528 | * ALL_COMMANDS to list all commands in list. |
| 529 | * ALL_CLASSES to list all classes in list. |
| 530 | * |
| 531 | * Note that RECURSE will be active on *all* sublists, not just the |
| 532 | * ones selected by the criteria above (ie. the selection mechanism |
| 533 | * is at the low level, not the high-level). |
| 534 | */ |
| 535 | void |
| 536 | help_cmd_list (list, class, prefix, recurse, stream) |
| 537 | struct cmd_list_element *list; |
| 538 | enum command_class class; |
| 539 | char *prefix; |
| 540 | int recurse; |
| 541 | GDB_FILE *stream; |
| 542 | { |
| 543 | register struct cmd_list_element *c; |
| 544 | |
| 545 | for (c = list; c; c = c->next) |
| 546 | { |
| 547 | if (c->abbrev_flag == 0 && |
| 548 | (class == all_commands |
| 549 | || (class == all_classes && c->function.cfunc == NULL) |
| 550 | || (class == c->class && c->function.cfunc != NULL))) |
| 551 | { |
| 552 | fprintf_filtered (stream, "%s%s -- ", prefix, c->name); |
| 553 | print_doc_line (stream, c->doc); |
| 554 | fputs_filtered ("\n", stream); |
| 555 | } |
| 556 | if (recurse |
| 557 | && c->prefixlist != 0 |
| 558 | && c->abbrev_flag == 0) |
| 559 | help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | \f |
| 564 | /* Search the input clist for 'command'. Return the command if |
| 565 | found (or NULL if not), and return the number of commands |
| 566 | found in nfound */ |
| 567 | |
| 568 | static struct cmd_list_element * |
| 569 | find_cmd(command, len, clist, ignore_help_classes, nfound) |
| 570 | char *command; |
| 571 | struct cmd_list_element *clist; |
| 572 | int ignore_help_classes; |
| 573 | int *nfound; |
| 574 | { |
| 575 | struct cmd_list_element *found, *c; |
| 576 | |
| 577 | found = (struct cmd_list_element *)NULL; |
| 578 | *nfound = 0; |
| 579 | for (c = clist; c; c = c->next) |
| 580 | if (!strncmp (command, c->name, len) |
| 581 | && (!ignore_help_classes || c->function.cfunc)) |
| 582 | { |
| 583 | found = c; |
| 584 | (*nfound)++; |
| 585 | if (c->name[len] == '\0') |
| 586 | { |
| 587 | *nfound = 1; |
| 588 | break; |
| 589 | } |
| 590 | } |
| 591 | return found; |
| 592 | } |
| 593 | |
| 594 | /* This routine takes a line of TEXT and a CLIST in which to start the |
| 595 | lookup. When it returns it will have incremented the text pointer past |
| 596 | the section of text it matched, set *RESULT_LIST to point to the list in |
| 597 | which the last word was matched, and will return a pointer to the cmd |
| 598 | list element which the text matches. It will return NULL if no match at |
| 599 | all was possible. It will return -1 (cast appropriately, ick) if ambigous |
| 600 | matches are possible; in this case *RESULT_LIST will be set to point to |
| 601 | the list in which there are ambiguous choices (and *TEXT will be set to |
| 602 | the ambiguous text string). |
| 603 | |
| 604 | If the located command was an abbreviation, this routine returns the base |
| 605 | command of the abbreviation. |
| 606 | |
| 607 | It does no error reporting whatsoever; control will always return |
| 608 | to the superior routine. |
| 609 | |
| 610 | In the case of an ambiguous return (-1), *RESULT_LIST will be set to point |
| 611 | at the prefix_command (ie. the best match) *or* (special case) will be NULL |
| 612 | if no prefix command was ever found. For example, in the case of "info a", |
| 613 | "info" matches without ambiguity, but "a" could be "args" or "address", so |
| 614 | *RESULT_LIST is set to the cmd_list_element for "info". So in this case |
| 615 | RESULT_LIST should not be interpeted as a pointer to the beginning of a |
| 616 | list; it simply points to a specific command. In the case of an ambiguous |
| 617 | return *TEXT is advanced past the last non-ambiguous prefix (e.g. |
| 618 | "info t" can be "info types" or "info target"; upon return *TEXT has been |
| 619 | advanced past "info "). |
| 620 | |
| 621 | If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise |
| 622 | affect the operation). |
| 623 | |
| 624 | This routine does *not* modify the text pointed to by TEXT. |
| 625 | |
| 626 | If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which |
| 627 | are actually help classes rather than commands (i.e. the function field of |
| 628 | the struct cmd_list_element is NULL). */ |
| 629 | |
| 630 | struct cmd_list_element * |
| 631 | lookup_cmd_1 (text, clist, result_list, ignore_help_classes) |
| 632 | char **text; |
| 633 | struct cmd_list_element *clist, **result_list; |
| 634 | int ignore_help_classes; |
| 635 | { |
| 636 | char *p, *command; |
| 637 | int len, tmp, nfound; |
| 638 | struct cmd_list_element *found, *c; |
| 639 | |
| 640 | while (**text == ' ' || **text == '\t') |
| 641 | (*text)++; |
| 642 | |
| 643 | /* Treating underscores as part of command words is important |
| 644 | so that "set args_foo()" doesn't get interpreted as |
| 645 | "set args _foo()". */ |
| 646 | for (p = *text; |
| 647 | *p && (isalnum(*p) || *p == '-' || *p == '_' || |
| 648 | (tui_version && |
| 649 | (*p == '+' || *p == '<' || *p == '>' || *p == '$')) || |
| 650 | (xdb_commands && (*p == '!' || *p == '/' || *p == '?'))); |
| 651 | p++) |
| 652 | ; |
| 653 | |
| 654 | /* If nothing but whitespace, return 0. */ |
| 655 | if (p == *text) |
| 656 | return 0; |
| 657 | |
| 658 | len = p - *text; |
| 659 | |
| 660 | /* *text and p now bracket the first command word to lookup (and |
| 661 | it's length is len). We copy this into a local temporary */ |
| 662 | |
| 663 | |
| 664 | command = (char *) alloca (len + 1); |
| 665 | for (tmp = 0; tmp < len; tmp++) |
| 666 | { |
| 667 | char x = (*text)[tmp]; |
| 668 | command[tmp] = x; |
| 669 | } |
| 670 | command[len] = '\0'; |
| 671 | |
| 672 | /* Look it up. */ |
| 673 | found = 0; |
| 674 | nfound = 0; |
| 675 | found = find_cmd(command, len, clist, ignore_help_classes, &nfound); |
| 676 | |
| 677 | /* |
| 678 | ** We didn't find the command in the entered case, so lower case it |
| 679 | ** and search again. |
| 680 | */ |
| 681 | if (!found || nfound == 0) |
| 682 | { |
| 683 | for (tmp = 0; tmp < len; tmp++) |
| 684 | { |
| 685 | char x = command[tmp]; |
| 686 | command[tmp] = isupper(x) ? tolower(x) : x; |
| 687 | } |
| 688 | found = find_cmd(command, len, clist, ignore_help_classes, &nfound); |
| 689 | } |
| 690 | |
| 691 | /* If nothing matches, we have a simple failure. */ |
| 692 | if (nfound == 0) |
| 693 | return 0; |
| 694 | |
| 695 | if (nfound > 1) |
| 696 | { |
| 697 | if (result_list != NULL) |
| 698 | /* Will be modified in calling routine |
| 699 | if we know what the prefix command is. */ |
| 700 | *result_list = 0; |
| 701 | return (struct cmd_list_element *) -1; /* Ambiguous. */ |
| 702 | } |
| 703 | |
| 704 | /* We've matched something on this list. Move text pointer forward. */ |
| 705 | |
| 706 | *text = p; |
| 707 | |
| 708 | /* If this was an abbreviation, use the base command instead. */ |
| 709 | |
| 710 | if (found->cmd_pointer) |
| 711 | found = found->cmd_pointer; |
| 712 | |
| 713 | /* If we found a prefix command, keep looking. */ |
| 714 | |
| 715 | if (found->prefixlist) |
| 716 | { |
| 717 | c = lookup_cmd_1 (text, *found->prefixlist, result_list, |
| 718 | ignore_help_classes); |
| 719 | if (!c) |
| 720 | { |
| 721 | /* Didn't find anything; this is as far as we got. */ |
| 722 | if (result_list != NULL) |
| 723 | *result_list = clist; |
| 724 | return found; |
| 725 | } |
| 726 | else if (c == (struct cmd_list_element *) -1) |
| 727 | { |
| 728 | /* We've gotten this far properly, but the next step |
| 729 | is ambiguous. We need to set the result list to the best |
| 730 | we've found (if an inferior hasn't already set it). */ |
| 731 | if (result_list != NULL) |
| 732 | if (!*result_list) |
| 733 | /* This used to say *result_list = *found->prefixlist |
| 734 | If that was correct, need to modify the documentation |
| 735 | at the top of this function to clarify what is supposed |
| 736 | to be going on. */ |
| 737 | *result_list = found; |
| 738 | return c; |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | /* We matched! */ |
| 743 | return c; |
| 744 | } |
| 745 | } |
| 746 | else |
| 747 | { |
| 748 | if (result_list != NULL) |
| 749 | *result_list = clist; |
| 750 | return found; |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | /* All this hair to move the space to the front of cmdtype */ |
| 755 | |
| 756 | static void |
| 757 | undef_cmd_error (cmdtype, q) |
| 758 | char *cmdtype, *q; |
| 759 | { |
| 760 | error ("Undefined %scommand: \"%s\". Try \"help%s%.*s\".", |
| 761 | cmdtype, |
| 762 | q, |
| 763 | *cmdtype? " ": "", |
| 764 | strlen(cmdtype)-1, |
| 765 | cmdtype); |
| 766 | } |
| 767 | |
| 768 | /* Look up the contents of *LINE as a command in the command list LIST. |
| 769 | LIST is a chain of struct cmd_list_element's. |
| 770 | If it is found, return the struct cmd_list_element for that command |
| 771 | and update *LINE to point after the command name, at the first argument. |
| 772 | If not found, call error if ALLOW_UNKNOWN is zero |
| 773 | otherwise (or if error returns) return zero. |
| 774 | Call error if specified command is ambiguous, |
| 775 | unless ALLOW_UNKNOWN is negative. |
| 776 | CMDTYPE precedes the word "command" in the error message. |
| 777 | |
| 778 | If INGNORE_HELP_CLASSES is nonzero, ignore any command list |
| 779 | elements which are actually help classes rather than commands (i.e. |
| 780 | the function field of the struct cmd_list_element is 0). */ |
| 781 | |
| 782 | struct cmd_list_element * |
| 783 | lookup_cmd (line, list, cmdtype, allow_unknown, ignore_help_classes) |
| 784 | char **line; |
| 785 | struct cmd_list_element *list; |
| 786 | char *cmdtype; |
| 787 | int allow_unknown; |
| 788 | int ignore_help_classes; |
| 789 | { |
| 790 | struct cmd_list_element *last_list = 0; |
| 791 | struct cmd_list_element *c = |
| 792 | lookup_cmd_1 (line, list, &last_list, ignore_help_classes); |
| 793 | #if 0 |
| 794 | /* This is wrong for complete_command. */ |
| 795 | char *ptr = (*line) + strlen (*line) - 1; |
| 796 | |
| 797 | /* Clear off trailing whitespace. */ |
| 798 | while (ptr >= *line && (*ptr == ' ' || *ptr == '\t')) |
| 799 | ptr--; |
| 800 | *(ptr + 1) = '\0'; |
| 801 | #endif |
| 802 | |
| 803 | if (!c) |
| 804 | { |
| 805 | if (!allow_unknown) |
| 806 | { |
| 807 | if (!*line) |
| 808 | error ("Lack of needed %scommand", cmdtype); |
| 809 | else |
| 810 | { |
| 811 | char *p = *line, *q; |
| 812 | |
| 813 | while (isalnum(*p) || *p == '-') |
| 814 | p++; |
| 815 | |
| 816 | q = (char *) alloca (p - *line + 1); |
| 817 | strncpy (q, *line, p - *line); |
| 818 | q[p - *line] = '\0'; |
| 819 | undef_cmd_error (cmdtype, q); |
| 820 | } |
| 821 | } |
| 822 | else |
| 823 | return 0; |
| 824 | } |
| 825 | else if (c == (struct cmd_list_element *) -1) |
| 826 | { |
| 827 | /* Ambigous. Local values should be off prefixlist or called |
| 828 | values. */ |
| 829 | int local_allow_unknown = (last_list ? last_list->allow_unknown : |
| 830 | allow_unknown); |
| 831 | char *local_cmdtype = last_list ? last_list->prefixname : cmdtype; |
| 832 | struct cmd_list_element *local_list = |
| 833 | (last_list ? *(last_list->prefixlist) : list); |
| 834 | |
| 835 | if (local_allow_unknown < 0) |
| 836 | { |
| 837 | if (last_list) |
| 838 | return last_list; /* Found something. */ |
| 839 | else |
| 840 | return 0; /* Found nothing. */ |
| 841 | } |
| 842 | else |
| 843 | { |
| 844 | /* Report as error. */ |
| 845 | int amb_len; |
| 846 | char ambbuf[100]; |
| 847 | |
| 848 | for (amb_len = 0; |
| 849 | ((*line)[amb_len] && (*line)[amb_len] != ' ' |
| 850 | && (*line)[amb_len] != '\t'); |
| 851 | amb_len++) |
| 852 | ; |
| 853 | |
| 854 | ambbuf[0] = 0; |
| 855 | for (c = local_list; c; c = c->next) |
| 856 | if (!strncmp (*line, c->name, amb_len)) |
| 857 | { |
| 858 | if (strlen (ambbuf) + strlen (c->name) + 6 < (int)sizeof ambbuf) |
| 859 | { |
| 860 | if (strlen (ambbuf)) |
| 861 | strcat (ambbuf, ", "); |
| 862 | strcat (ambbuf, c->name); |
| 863 | } |
| 864 | else |
| 865 | { |
| 866 | strcat (ambbuf, ".."); |
| 867 | break; |
| 868 | } |
| 869 | } |
| 870 | error ("Ambiguous %scommand \"%s\": %s.", local_cmdtype, |
| 871 | *line, ambbuf); |
| 872 | return 0; /* lint */ |
| 873 | } |
| 874 | } |
| 875 | else |
| 876 | { |
| 877 | /* We've got something. It may still not be what the caller |
| 878 | wants (if this command *needs* a subcommand). */ |
| 879 | while (**line == ' ' || **line == '\t') |
| 880 | (*line)++; |
| 881 | |
| 882 | if (c->prefixlist && **line && !c->allow_unknown) |
| 883 | undef_cmd_error (c->prefixname, *line); |
| 884 | |
| 885 | /* Seems to be what he wants. Return it. */ |
| 886 | return c; |
| 887 | } |
| 888 | return 0; |
| 889 | } |
| 890 | |
| 891 | #if 0 |
| 892 | /* Look up the contents of *LINE as a command in the command list LIST. |
| 893 | LIST is a chain of struct cmd_list_element's. |
| 894 | If it is found, return the struct cmd_list_element for that command |
| 895 | and update *LINE to point after the command name, at the first argument. |
| 896 | If not found, call error if ALLOW_UNKNOWN is zero |
| 897 | otherwise (or if error returns) return zero. |
| 898 | Call error if specified command is ambiguous, |
| 899 | unless ALLOW_UNKNOWN is negative. |
| 900 | CMDTYPE precedes the word "command" in the error message. */ |
| 901 | |
| 902 | struct cmd_list_element * |
| 903 | lookup_cmd (line, list, cmdtype, allow_unknown) |
| 904 | char **line; |
| 905 | struct cmd_list_element *list; |
| 906 | char *cmdtype; |
| 907 | int allow_unknown; |
| 908 | { |
| 909 | register char *p; |
| 910 | register struct cmd_list_element *c, *found; |
| 911 | int nfound; |
| 912 | char ambbuf[100]; |
| 913 | char *processed_cmd; |
| 914 | int i, cmd_len; |
| 915 | |
| 916 | /* Skip leading whitespace. */ |
| 917 | |
| 918 | while (**line == ' ' || **line == '\t') |
| 919 | (*line)++; |
| 920 | |
| 921 | /* Clear out trailing whitespace. */ |
| 922 | |
| 923 | p = *line + strlen (*line); |
| 924 | while (p != *line && (p[-1] == ' ' || p[-1] == '\t')) |
| 925 | p--; |
| 926 | *p = 0; |
| 927 | |
| 928 | /* Find end of command name. */ |
| 929 | |
| 930 | p = *line; |
| 931 | while (*p == '-' || isalnum(*p)) |
| 932 | p++; |
| 933 | |
| 934 | /* Look up the command name. |
| 935 | If exact match, keep that. |
| 936 | Otherwise, take command abbreviated, if unique. Note that (in my |
| 937 | opinion) a null string does *not* indicate ambiguity; simply the |
| 938 | end of the argument. */ |
| 939 | |
| 940 | if (p == *line) |
| 941 | { |
| 942 | if (!allow_unknown) |
| 943 | error ("Lack of needed %scommand", cmdtype); |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | /* Copy over to a local buffer, converting to lowercase on the way. |
| 948 | This is in case the command being parsed is a subcommand which |
| 949 | doesn't match anything, and that's ok. We want the original |
| 950 | untouched for the routine of the original command. */ |
| 951 | |
| 952 | processed_cmd = (char *) alloca (p - *line + 1); |
| 953 | for (cmd_len = 0; cmd_len < p - *line; cmd_len++) |
| 954 | { |
| 955 | char x = (*line)[cmd_len]; |
| 956 | if (isupper(x)) |
| 957 | processed_cmd[cmd_len] = tolower(x); |
| 958 | else |
| 959 | processed_cmd[cmd_len] = x; |
| 960 | } |
| 961 | processed_cmd[cmd_len] = '\0'; |
| 962 | |
| 963 | /* Check all possibilities in the current command list. */ |
| 964 | found = 0; |
| 965 | nfound = 0; |
| 966 | for (c = list; c; c = c->next) |
| 967 | { |
| 968 | if (!strncmp (processed_cmd, c->name, cmd_len)) |
| 969 | { |
| 970 | found = c; |
| 971 | nfound++; |
| 972 | if (c->name[cmd_len] == 0) |
| 973 | { |
| 974 | nfound = 1; |
| 975 | break; |
| 976 | } |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | /* Report error for undefined command name. */ |
| 981 | |
| 982 | if (nfound != 1) |
| 983 | { |
| 984 | if (nfound > 1 && allow_unknown >= 0) |
| 985 | { |
| 986 | ambbuf[0] = 0; |
| 987 | for (c = list; c; c = c->next) |
| 988 | if (!strncmp (processed_cmd, c->name, cmd_len)) |
| 989 | { |
| 990 | if (strlen (ambbuf) + strlen (c->name) + 6 < sizeof ambbuf) |
| 991 | { |
| 992 | if (strlen (ambbuf)) |
| 993 | strcat (ambbuf, ", "); |
| 994 | strcat (ambbuf, c->name); |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | strcat (ambbuf, ".."); |
| 999 | break; |
| 1000 | } |
| 1001 | } |
| 1002 | error ("Ambiguous %scommand \"%s\": %s.", cmdtype, |
| 1003 | processed_cmd, ambbuf); |
| 1004 | } |
| 1005 | else if (!allow_unknown) |
| 1006 | error ("Undefined %scommand: \"%s\".", cmdtype, processed_cmd); |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | /* Skip whitespace before the argument. */ |
| 1011 | |
| 1012 | while (*p == ' ' || *p == '\t') p++; |
| 1013 | *line = p; |
| 1014 | |
| 1015 | if (found->prefixlist && *p) |
| 1016 | { |
| 1017 | c = lookup_cmd (line, *found->prefixlist, found->prefixname, |
| 1018 | found->allow_unknown); |
| 1019 | if (c) |
| 1020 | return c; |
| 1021 | } |
| 1022 | |
| 1023 | return found; |
| 1024 | } |
| 1025 | #endif |
| 1026 | |
| 1027 | /* Helper function for SYMBOL_COMPLETION_FUNCTION. */ |
| 1028 | |
| 1029 | /* Return a vector of char pointers which point to the different |
| 1030 | possible completions in LIST of TEXT. |
| 1031 | |
| 1032 | WORD points in the same buffer as TEXT, and completions should be |
| 1033 | returned relative to this position. For example, suppose TEXT is "foo" |
| 1034 | and we want to complete to "foobar". If WORD is "oo", return |
| 1035 | "oobar"; if WORD is "baz/foo", return "baz/foobar". */ |
| 1036 | |
| 1037 | char ** |
| 1038 | complete_on_cmdlist (list, text, word) |
| 1039 | struct cmd_list_element *list; |
| 1040 | char *text; |
| 1041 | char *word; |
| 1042 | { |
| 1043 | struct cmd_list_element *ptr; |
| 1044 | char **matchlist; |
| 1045 | int sizeof_matchlist; |
| 1046 | int matches; |
| 1047 | int textlen = strlen (text); |
| 1048 | |
| 1049 | sizeof_matchlist = 10; |
| 1050 | matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *)); |
| 1051 | matches = 0; |
| 1052 | |
| 1053 | for (ptr = list; ptr; ptr = ptr->next) |
| 1054 | if (!strncmp (ptr->name, text, textlen) |
| 1055 | && !ptr->abbrev_flag |
| 1056 | && (ptr->function.cfunc |
| 1057 | || ptr->prefixlist)) |
| 1058 | { |
| 1059 | if (matches == sizeof_matchlist) |
| 1060 | { |
| 1061 | sizeof_matchlist *= 2; |
| 1062 | matchlist = (char **) xrealloc ((char *)matchlist, |
| 1063 | (sizeof_matchlist |
| 1064 | * sizeof (char *))); |
| 1065 | } |
| 1066 | |
| 1067 | matchlist[matches] = (char *) |
| 1068 | xmalloc (strlen (word) + strlen (ptr->name) + 1); |
| 1069 | if (word == text) |
| 1070 | strcpy (matchlist[matches], ptr->name); |
| 1071 | else if (word > text) |
| 1072 | { |
| 1073 | /* Return some portion of ptr->name. */ |
| 1074 | strcpy (matchlist[matches], ptr->name + (word - text)); |
| 1075 | } |
| 1076 | else |
| 1077 | { |
| 1078 | /* Return some of text plus ptr->name. */ |
| 1079 | strncpy (matchlist[matches], word, text - word); |
| 1080 | matchlist[matches][text - word] = '\0'; |
| 1081 | strcat (matchlist[matches], ptr->name); |
| 1082 | } |
| 1083 | ++matches; |
| 1084 | } |
| 1085 | |
| 1086 | if (matches == 0) |
| 1087 | { |
| 1088 | free ((PTR)matchlist); |
| 1089 | matchlist = 0; |
| 1090 | } |
| 1091 | else |
| 1092 | { |
| 1093 | matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1) |
| 1094 | * sizeof (char *))); |
| 1095 | matchlist[matches] = (char *) 0; |
| 1096 | } |
| 1097 | |
| 1098 | return matchlist; |
| 1099 | } |
| 1100 | |
| 1101 | /* Helper function for SYMBOL_COMPLETION_FUNCTION. */ |
| 1102 | |
| 1103 | /* Return a vector of char pointers which point to the different |
| 1104 | possible completions in CMD of TEXT. |
| 1105 | |
| 1106 | WORD points in the same buffer as TEXT, and completions should be |
| 1107 | returned relative to this position. For example, suppose TEXT is "foo" |
| 1108 | and we want to complete to "foobar". If WORD is "oo", return |
| 1109 | "oobar"; if WORD is "baz/foo", return "baz/foobar". */ |
| 1110 | |
| 1111 | char ** |
| 1112 | complete_on_enum (enumlist, text, word) |
| 1113 | char **enumlist; |
| 1114 | char *text; |
| 1115 | char *word; |
| 1116 | { |
| 1117 | char **matchlist; |
| 1118 | int sizeof_matchlist; |
| 1119 | int matches; |
| 1120 | int textlen = strlen (text); |
| 1121 | int i; |
| 1122 | char *name; |
| 1123 | |
| 1124 | sizeof_matchlist = 10; |
| 1125 | matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *)); |
| 1126 | matches = 0; |
| 1127 | |
| 1128 | for (i = 0; (name = enumlist[i]) != NULL; i++) |
| 1129 | if (strncmp (name, text, textlen) == 0) |
| 1130 | { |
| 1131 | if (matches == sizeof_matchlist) |
| 1132 | { |
| 1133 | sizeof_matchlist *= 2; |
| 1134 | matchlist = (char **) xrealloc ((char *)matchlist, |
| 1135 | (sizeof_matchlist |
| 1136 | * sizeof (char *))); |
| 1137 | } |
| 1138 | |
| 1139 | matchlist[matches] = (char *) |
| 1140 | xmalloc (strlen (word) + strlen (name) + 1); |
| 1141 | if (word == text) |
| 1142 | strcpy (matchlist[matches], name); |
| 1143 | else if (word > text) |
| 1144 | { |
| 1145 | /* Return some portion of name. */ |
| 1146 | strcpy (matchlist[matches], name + (word - text)); |
| 1147 | } |
| 1148 | else |
| 1149 | { |
| 1150 | /* Return some of text plus name. */ |
| 1151 | strncpy (matchlist[matches], word, text - word); |
| 1152 | matchlist[matches][text - word] = '\0'; |
| 1153 | strcat (matchlist[matches], name); |
| 1154 | } |
| 1155 | ++matches; |
| 1156 | } |
| 1157 | |
| 1158 | if (matches == 0) |
| 1159 | { |
| 1160 | free ((PTR)matchlist); |
| 1161 | matchlist = 0; |
| 1162 | } |
| 1163 | else |
| 1164 | { |
| 1165 | matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1) |
| 1166 | * sizeof (char *))); |
| 1167 | matchlist[matches] = (char *) 0; |
| 1168 | } |
| 1169 | |
| 1170 | return matchlist; |
| 1171 | } |
| 1172 | |
| 1173 | static int |
| 1174 | parse_binary_operation (arg) |
| 1175 | char *arg; |
| 1176 | { |
| 1177 | int length; |
| 1178 | |
| 1179 | if (!arg || !*arg) |
| 1180 | return 1; |
| 1181 | |
| 1182 | length = strlen (arg); |
| 1183 | |
| 1184 | while (arg[length - 1] == ' ' || arg[length - 1] == '\t') |
| 1185 | length--; |
| 1186 | |
| 1187 | if (!strncmp (arg, "on", length) |
| 1188 | || !strncmp (arg, "1", length) |
| 1189 | || !strncmp (arg, "yes", length)) |
| 1190 | return 1; |
| 1191 | else |
| 1192 | if (!strncmp (arg, "off", length) |
| 1193 | || !strncmp (arg, "0", length) |
| 1194 | || !strncmp (arg, "no", length)) |
| 1195 | return 0; |
| 1196 | else |
| 1197 | { |
| 1198 | error ("\"on\" or \"off\" expected."); |
| 1199 | return 0; |
| 1200 | } |
| 1201 | } |
| 1202 | |
| 1203 | /* Do a "set" or "show" command. ARG is NULL if no argument, or the text |
| 1204 | of the argument, and FROM_TTY is nonzero if this command is being entered |
| 1205 | directly by the user (i.e. these are just like any other |
| 1206 | command). C is the command list element for the command. */ |
| 1207 | void |
| 1208 | do_setshow_command (arg, from_tty, c) |
| 1209 | char *arg; |
| 1210 | int from_tty; |
| 1211 | struct cmd_list_element *c; |
| 1212 | { |
| 1213 | if (c->type == set_cmd) |
| 1214 | { |
| 1215 | switch (c->var_type) |
| 1216 | { |
| 1217 | case var_string: |
| 1218 | { |
| 1219 | char *new; |
| 1220 | char *p; |
| 1221 | char *q; |
| 1222 | int ch; |
| 1223 | |
| 1224 | if (arg == NULL) |
| 1225 | arg = ""; |
| 1226 | new = (char *) xmalloc (strlen (arg) + 2); |
| 1227 | p = arg; q = new; |
| 1228 | while ((ch = *p++) != '\000') |
| 1229 | { |
| 1230 | if (ch == '\\') |
| 1231 | { |
| 1232 | /* \ at end of argument is used after spaces |
| 1233 | so they won't be lost. */ |
| 1234 | /* This is obsolete now that we no longer strip |
| 1235 | trailing whitespace and actually, the backslash |
| 1236 | didn't get here in my test, readline or |
| 1237 | something did something funky with a backslash |
| 1238 | right before a newline. */ |
| 1239 | if (*p == 0) |
| 1240 | break; |
| 1241 | ch = parse_escape (&p); |
| 1242 | if (ch == 0) |
| 1243 | break; /* C loses */ |
| 1244 | else if (ch > 0) |
| 1245 | *q++ = ch; |
| 1246 | } |
| 1247 | else |
| 1248 | *q++ = ch; |
| 1249 | } |
| 1250 | #if 0 |
| 1251 | if (*(p - 1) != '\\') |
| 1252 | *q++ = ' '; |
| 1253 | #endif |
| 1254 | *q++ = '\0'; |
| 1255 | new = (char *) xrealloc (new, q - new); |
| 1256 | if (*(char **)c->var != NULL) |
| 1257 | free (*(char **)c->var); |
| 1258 | *(char **) c->var = new; |
| 1259 | } |
| 1260 | break; |
| 1261 | case var_string_noescape: |
| 1262 | if (arg == NULL) |
| 1263 | arg = ""; |
| 1264 | if (*(char **)c->var != NULL) |
| 1265 | free (*(char **)c->var); |
| 1266 | *(char **) c->var = savestring (arg, strlen (arg)); |
| 1267 | break; |
| 1268 | case var_filename: |
| 1269 | if (arg == NULL) |
| 1270 | error_no_arg ("filename to set it to."); |
| 1271 | if (*(char **)c->var != NULL) |
| 1272 | free (*(char **)c->var); |
| 1273 | *(char **)c->var = tilde_expand (arg); |
| 1274 | break; |
| 1275 | case var_boolean: |
| 1276 | *(int *) c->var = parse_binary_operation (arg); |
| 1277 | break; |
| 1278 | case var_uinteger: |
| 1279 | if (arg == NULL) |
| 1280 | error_no_arg ("integer to set it to."); |
| 1281 | *(unsigned int *) c->var = parse_and_eval_address (arg); |
| 1282 | if (*(unsigned int *) c->var == 0) |
| 1283 | *(unsigned int *) c->var = UINT_MAX; |
| 1284 | break; |
| 1285 | case var_integer: |
| 1286 | { |
| 1287 | unsigned int val; |
| 1288 | if (arg == NULL) |
| 1289 | error_no_arg ("integer to set it to."); |
| 1290 | val = parse_and_eval_address (arg); |
| 1291 | if (val == 0) |
| 1292 | *(int *) c->var = INT_MAX; |
| 1293 | else if (val >= INT_MAX) |
| 1294 | error ("integer %u out of range", val); |
| 1295 | else |
| 1296 | *(int *) c->var = val; |
| 1297 | break; |
| 1298 | } |
| 1299 | case var_zinteger: |
| 1300 | if (arg == NULL) |
| 1301 | error_no_arg ("integer to set it to."); |
| 1302 | *(int *) c->var = parse_and_eval_address (arg); |
| 1303 | break; |
| 1304 | case var_enum: |
| 1305 | { |
| 1306 | int i; |
| 1307 | int len; |
| 1308 | int nmatches; |
| 1309 | char *match = NULL; |
| 1310 | char *p; |
| 1311 | |
| 1312 | /* if no argument was supplied, print an informative error message */ |
| 1313 | if (arg == NULL) |
| 1314 | { |
| 1315 | char msg[1024]; |
| 1316 | strcpy (msg, "Requires an argument. Valid arguments are "); |
| 1317 | for (i = 0; c->enums[i]; i++) |
| 1318 | { |
| 1319 | if (i != 0) |
| 1320 | strcat (msg, ", "); |
| 1321 | strcat (msg, c->enums[i]); |
| 1322 | } |
| 1323 | strcat (msg, "."); |
| 1324 | error (msg); |
| 1325 | } |
| 1326 | |
| 1327 | p = strchr (arg, ' '); |
| 1328 | |
| 1329 | if (p) |
| 1330 | len = p - arg; |
| 1331 | else |
| 1332 | len = strlen (arg); |
| 1333 | |
| 1334 | nmatches = 0; |
| 1335 | for (i = 0; c->enums[i]; i++) |
| 1336 | if (strncmp (arg, c->enums[i], len) == 0) |
| 1337 | { |
| 1338 | match = c->enums[i]; |
| 1339 | nmatches++; |
| 1340 | } |
| 1341 | |
| 1342 | if (nmatches <= 0) |
| 1343 | error ("Undefined item: \"%s\".", arg); |
| 1344 | |
| 1345 | if (nmatches > 1) |
| 1346 | error ("Ambiguous item \"%s\".", arg); |
| 1347 | |
| 1348 | *(char **)c->var = match; |
| 1349 | } |
| 1350 | break; |
| 1351 | default: |
| 1352 | error ("gdb internal error: bad var_type in do_setshow_command"); |
| 1353 | } |
| 1354 | } |
| 1355 | else if (c->type == show_cmd) |
| 1356 | { |
| 1357 | /* Print doc minus "show" at start. */ |
| 1358 | print_doc_line (gdb_stdout, c->doc + 5); |
| 1359 | |
| 1360 | fputs_filtered (" is ", gdb_stdout); |
| 1361 | wrap_here (" "); |
| 1362 | switch (c->var_type) |
| 1363 | { |
| 1364 | case var_string: |
| 1365 | { |
| 1366 | unsigned char *p; |
| 1367 | |
| 1368 | fputs_filtered ("\"", gdb_stdout); |
| 1369 | if (*(unsigned char **)c->var) |
| 1370 | for (p = *(unsigned char **) c->var; *p != '\0'; p++) |
| 1371 | gdb_printchar (*p, gdb_stdout, '"'); |
| 1372 | fputs_filtered ("\"", gdb_stdout); |
| 1373 | } |
| 1374 | break; |
| 1375 | case var_string_noescape: |
| 1376 | case var_filename: |
| 1377 | case var_enum: |
| 1378 | fputs_filtered ("\"", gdb_stdout); |
| 1379 | if (*(char **)c->var) |
| 1380 | fputs_filtered (*(char **) c->var, gdb_stdout); |
| 1381 | fputs_filtered ("\"", gdb_stdout); |
| 1382 | break; |
| 1383 | case var_boolean: |
| 1384 | fputs_filtered (*(int *) c->var ? "on" : "off", gdb_stdout); |
| 1385 | break; |
| 1386 | case var_uinteger: |
| 1387 | if (*(unsigned int *) c->var == UINT_MAX) { |
| 1388 | fputs_filtered ("unlimited", gdb_stdout); |
| 1389 | break; |
| 1390 | } |
| 1391 | /* else fall through */ |
| 1392 | case var_zinteger: |
| 1393 | fprintf_filtered (gdb_stdout, "%u", *(unsigned int *) c->var); |
| 1394 | break; |
| 1395 | case var_integer: |
| 1396 | if (*(int *) c->var == INT_MAX) |
| 1397 | { |
| 1398 | fputs_filtered ("unlimited", gdb_stdout); |
| 1399 | } |
| 1400 | else |
| 1401 | fprintf_filtered (gdb_stdout, "%d", *(int *) c->var); |
| 1402 | break; |
| 1403 | |
| 1404 | default: |
| 1405 | error ("gdb internal error: bad var_type in do_setshow_command"); |
| 1406 | } |
| 1407 | fputs_filtered (".\n", gdb_stdout); |
| 1408 | } |
| 1409 | else |
| 1410 | error ("gdb internal error: bad cmd_type in do_setshow_command"); |
| 1411 | (*c->function.sfunc) (NULL, from_tty, c); |
| 1412 | } |
| 1413 | |
| 1414 | /* Show all the settings in a list of show commands. */ |
| 1415 | |
| 1416 | void |
| 1417 | cmd_show_list (list, from_tty, prefix) |
| 1418 | struct cmd_list_element *list; |
| 1419 | int from_tty; |
| 1420 | char *prefix; |
| 1421 | { |
| 1422 | for (; list != NULL; list = list->next) { |
| 1423 | /* If we find a prefix, run its list, prefixing our output by its |
| 1424 | prefix (with "show " skipped). */ |
| 1425 | if (list->prefixlist && !list->abbrev_flag) |
| 1426 | cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5); |
| 1427 | if (list->type == show_cmd) |
| 1428 | { |
| 1429 | fputs_filtered (prefix, gdb_stdout); |
| 1430 | fputs_filtered (list->name, gdb_stdout); |
| 1431 | fputs_filtered (": ", gdb_stdout); |
| 1432 | do_setshow_command ((char *)NULL, from_tty, list); |
| 1433 | } |
| 1434 | } |
| 1435 | } |
| 1436 | |
| 1437 | /* ARGSUSED */ |
| 1438 | static void |
| 1439 | shell_escape (arg, from_tty) |
| 1440 | char *arg; |
| 1441 | int from_tty; |
| 1442 | { |
| 1443 | #ifdef CANT_FORK |
| 1444 | /* FIXME: what about errors (I don't know how GO32 system() handles |
| 1445 | them)? */ |
| 1446 | system (arg); |
| 1447 | #else /* Can fork. */ |
| 1448 | int rc, status, pid; |
| 1449 | char *p, *user_shell; |
| 1450 | |
| 1451 | if ((user_shell = (char *) getenv ("SHELL")) == NULL) |
| 1452 | user_shell = "/bin/sh"; |
| 1453 | |
| 1454 | /* Get the name of the shell for arg0 */ |
| 1455 | if ((p = strrchr (user_shell, '/')) == NULL) |
| 1456 | p = user_shell; |
| 1457 | else |
| 1458 | p++; /* Get past '/' */ |
| 1459 | |
| 1460 | if ((pid = fork()) == 0) |
| 1461 | { |
| 1462 | if (!arg) |
| 1463 | execl (user_shell, p, 0); |
| 1464 | else |
| 1465 | execl (user_shell, p, "-c", arg, 0); |
| 1466 | |
| 1467 | fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell, |
| 1468 | safe_strerror (errno)); |
| 1469 | gdb_flush (gdb_stderr); |
| 1470 | _exit (0177); |
| 1471 | } |
| 1472 | |
| 1473 | if (pid != -1) |
| 1474 | while ((rc = wait (&status)) != pid && rc != -1) |
| 1475 | ; |
| 1476 | else |
| 1477 | error ("Fork failed"); |
| 1478 | #endif /* Can fork. */ |
| 1479 | } |
| 1480 | |
| 1481 | static void |
| 1482 | make_command (arg, from_tty) |
| 1483 | char *arg; |
| 1484 | int from_tty; |
| 1485 | { |
| 1486 | char *p; |
| 1487 | |
| 1488 | if (arg == 0) |
| 1489 | p = "make"; |
| 1490 | else |
| 1491 | { |
| 1492 | p = xmalloc (sizeof("make ") + strlen(arg)); |
| 1493 | strcpy (p, "make "); |
| 1494 | strcpy (p + sizeof("make ")-1, arg); |
| 1495 | } |
| 1496 | |
| 1497 | shell_escape (p, from_tty); |
| 1498 | } |
| 1499 | |
| 1500 | static void |
| 1501 | show_user_1 (c, stream) |
| 1502 | struct cmd_list_element *c; |
| 1503 | GDB_FILE *stream; |
| 1504 | { |
| 1505 | register struct command_line *cmdlines; |
| 1506 | |
| 1507 | cmdlines = c->user_commands; |
| 1508 | if (!cmdlines) |
| 1509 | return; |
| 1510 | fputs_filtered ("User command ", stream); |
| 1511 | fputs_filtered (c->name, stream); |
| 1512 | fputs_filtered (":\n", stream); |
| 1513 | |
| 1514 | while (cmdlines) |
| 1515 | { |
| 1516 | print_command_line (cmdlines, 4); |
| 1517 | cmdlines = cmdlines->next; |
| 1518 | } |
| 1519 | fputs_filtered ("\n", stream); |
| 1520 | } |
| 1521 | |
| 1522 | /* ARGSUSED */ |
| 1523 | static void |
| 1524 | show_user (args, from_tty) |
| 1525 | char *args; |
| 1526 | int from_tty; |
| 1527 | { |
| 1528 | struct cmd_list_element *c; |
| 1529 | extern struct cmd_list_element *cmdlist; |
| 1530 | |
| 1531 | if (args) |
| 1532 | { |
| 1533 | c = lookup_cmd (&args, cmdlist, "", 0, 1); |
| 1534 | if (c->class != class_user) |
| 1535 | error ("Not a user command."); |
| 1536 | show_user_1 (c, gdb_stdout); |
| 1537 | } |
| 1538 | else |
| 1539 | { |
| 1540 | for (c = cmdlist; c; c = c->next) |
| 1541 | { |
| 1542 | if (c->class == class_user) |
| 1543 | show_user_1 (c, gdb_stdout); |
| 1544 | } |
| 1545 | } |
| 1546 | } |
| 1547 | |
| 1548 | void |
| 1549 | _initialize_command () |
| 1550 | { |
| 1551 | add_com ("shell", class_support, shell_escape, |
| 1552 | "Execute the rest of the line as a shell command. \n\ |
| 1553 | With no arguments, run an inferior shell."); |
| 1554 | |
| 1555 | if (xdb_commands) |
| 1556 | add_com_alias("!", "shell", class_support, 0); |
| 1557 | |
| 1558 | add_com ("make", class_support, make_command, |
| 1559 | "Run the ``make'' program using the rest of the line as arguments."); |
| 1560 | add_cmd ("user", no_class, show_user, |
| 1561 | "Show definitions of user defined commands.\n\ |
| 1562 | Argument is the name of the user defined command.\n\ |
| 1563 | With no argument, show definitions of all user defined commands.", &showlist); |
| 1564 | } |