gdb/cli/cli-cmds.c

   1 /* GDB CLI commands.
   2    Copyright 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "completer.h"
  23 #include "target.h"      /* For baud_rate, remote_debug and remote_timeout */
  24 #include "gdb_wait.h"           /* For shell escape implementation */
  25 #include "gnu-regex.h"          /* Used by apropos_command */
  26
  27 #ifdef UI_OUT
  28 #include "ui-out.h"
  29 #endif
  30
  31 #include "top.h"
  32 #include "cli/cli-decode.h"
  33 #include "cli/cli-script.h"
  34 #include "cli/cli-setshow.h"
  35 #include "cli/cli-cmds.h"
  36
  37 #ifndef GDBINIT_FILENAME
  38 #define GDBINIT_FILENAME        ".gdbinit"
  39 #endif
  40
  41 /* FIXME: this should be auto-configured!  */
  42 #ifdef __MSDOS__
  43 # define CANT_FORK
  44 #endif
  45
  46 /* From gdb/top.c */
  47
  48 extern void dont_repeat (void);
  49
  50 extern void set_verbose (char *, int, struct cmd_list_element *);
  51
  52 extern void show_history (char *, int);
  53
  54 extern void set_history (char *, int);
  55
  56 extern void show_commands (char *, int);
  57
  58 /* Prototypes for local functions */
  59
  60 static void complete_command (char *, int);
  61
  62 static void echo_command (char *, int);
  63
  64 static void pwd_command (char *, int);
  65
  66 static void show_version (char *, int);
  67
  68 static void validate_comname (char *);
  69
  70 static void help_command (char *, int);
  71
  72 static void show_command (char *, int);
  73
  74 static void info_command (char *, int);
  75
  76 static void show_debug (char *, int);
  77
  78 static void set_debug (char *, int);
  79
  80 static void show_user (char *, int);
  81
  82 static void make_command (char *, int);
  83
  84 static void shell_escape (char *, int);
  85
  86 void apropos_command (char *, int);
  87 \f
  88 /* Define all cmd_list_elements.  */
  89
  90 /* Chain containing all defined commands.  */
  91
  92 struct cmd_list_element *cmdlist;
  93
  94 /* Chain containing all defined info subcommands.  */
  95
  96 struct cmd_list_element *infolist;
  97
  98 /* Chain containing all defined enable subcommands. */
  99
 100 struct cmd_list_element *enablelist;
 101
 102 /* Chain containing all defined disable subcommands. */
 103
 104 struct cmd_list_element *disablelist;
 105
 106 /* Chain containing all defined toggle subcommands. */
 107
 108 struct cmd_list_element *togglelist;
 109
 110 /* Chain containing all defined stop subcommands. */
 111
 112 struct cmd_list_element *stoplist;
 113
 114 /* Chain containing all defined delete subcommands. */
 115
 116 struct cmd_list_element *deletelist;
 117
 118 /* Chain containing all defined "enable breakpoint" subcommands. */
 119
 120 struct cmd_list_element *enablebreaklist;
 121
 122 /* Chain containing all defined set subcommands */
 123
 124 struct cmd_list_element *setlist;
 125
 126 /* Chain containing all defined unset subcommands */
 127
 128 struct cmd_list_element *unsetlist;
 129
 130 /* Chain containing all defined show subcommands.  */
 131
 132 struct cmd_list_element *showlist;
 133
 134 /* Chain containing all defined \"set history\".  */
 135
 136 struct cmd_list_element *sethistlist;
 137
 138 /* Chain containing all defined \"show history\".  */
 139
 140 struct cmd_list_element *showhistlist;
 141
 142 /* Chain containing all defined \"unset history\".  */
 143
 144 struct cmd_list_element *unsethistlist;
 145
 146 /* Chain containing all defined maintenance subcommands. */
 147
 148 struct cmd_list_element *maintenancelist;
 149
 150 /* Chain containing all defined "maintenance info" subcommands. */
 151
 152 struct cmd_list_element *maintenanceinfolist;
 153
 154 /* Chain containing all defined "maintenance print" subcommands. */
 155
 156 struct cmd_list_element *maintenanceprintlist;
 157
 158 struct cmd_list_element *setprintlist;
 159
 160 struct cmd_list_element *showprintlist;
 161
 162 struct cmd_list_element *setdebuglist;
 163
 164 struct cmd_list_element *showdebuglist;
 165
 166 struct cmd_list_element *setchecklist;
 167
 168 struct cmd_list_element *showchecklist;
 169 \f
 170 /* Utility used everywhere when at least one argument is needed and
 171    none is supplied. */
 172
 173 void
 174 error_no_arg (char *why)
 175 {
 176   error ("Argument required (%s).", why);
 177 }
 178
 179 /* The "info" command is defined as a prefix, with allow_unknown = 0.
 180    Therefore, its own definition is called only for "info" with no args.  */
 181
 182 /* ARGSUSED */
 183 static void
 184 info_command (char *arg, int from_tty)
 185 {
 186   printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
 187   help_list (infolist, "info ", -1, gdb_stdout);
 188 }
 189
 190 /* The "show" command with no arguments shows all the settings.  */
 191
 192 /* ARGSUSED */
 193 static void
 194 show_command (char *arg, int from_tty)
 195 {
 196   cmd_show_list (showlist, from_tty, "");
 197 }
 198 \f
 199 /* Provide documentation on command or list given by COMMAND.  FROM_TTY
 200    is ignored.  */
 201
 202 /* ARGSUSED */
 203 static void
 204 help_command (char *command, int from_tty)
 205 {
 206   help_cmd (command, gdb_stdout);
 207 }
 208 \f
 209 /* The "complete" command is used by Emacs to implement completion.  */
 210
 211 /* ARGSUSED */
 212 static void
 213 complete_command (char *arg, int from_tty)
 214 {
 215   int i;
 216   int argpoint;
 217   char *completion;
 218
 219   dont_repeat ();
 220
 221   if (arg == NULL)
 222     arg = "";
 223   argpoint = strlen (arg);
 224
 225   for (completion = line_completion_function (arg, i = 0, arg, argpoint);
 226        completion;
 227        completion = line_completion_function (arg, ++i, arg, argpoint))
 228     {
 229       printf_unfiltered ("%s\n", completion);
 230       xfree (completion);
 231     }
 232 }
 233
 234 int is_complete_command (void (*func) (char *args, int from_tty))
 235 {
 236   return func == complete_command;
 237 }
 238
 239 /* ARGSUSED */
 240 static void
 241 show_version (char *args, int from_tty)
 242 {
 243   immediate_quit++;
 244   print_gdb_version (gdb_stdout);
 245   printf_filtered ("\n");
 246   immediate_quit--;
 247 }
 248
 249 /* Handle the quit command.  */
 250
 251 void
 252 quit_command (char *args, int from_tty)
 253 {
 254   if (!quit_confirm ())
 255     error ("Not confirmed.");
 256   quit_force (args, from_tty);
 257 }
 258
 259 /* ARGSUSED */
 260 static void
 261 pwd_command (char *args, int from_tty)
 262 {
 263   if (args)
 264     error ("The \"pwd\" command does not take an argument: %s", args);
 265   getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
 266
 267   if (!STREQ (gdb_dirbuf, current_directory))
 268     printf_unfiltered ("Working directory %s\n (canonically %s).\n",
 269                        current_directory, gdb_dirbuf);
 270   else
 271     printf_unfiltered ("Working directory %s.\n", current_directory);
 272 }
 273
 274 void
 275 cd_command (char *dir, int from_tty)
 276 {
 277   int len;
 278   /* Found something other than leading repetitions of "/..".  */
 279   int found_real_path;
 280   char *p;
 281
 282   /* If the new directory is absolute, repeat is a no-op; if relative,
 283      repeat might be useful but is more likely to be a mistake.  */
 284   dont_repeat ();
 285
 286   if (dir == 0)
 287     error_no_arg ("new working directory");
 288
 289   dir = tilde_expand (dir);
 290   make_cleanup (xfree, dir);
 291
 292   if (chdir (dir) < 0)
 293     perror_with_name (dir);
 294
 295 #if defined(_WIN32) || defined(__MSDOS__)
 296   /* There's too much mess with DOSish names like "d:", "d:.",
 297      "d:./foo" etc.  Instead of having lots of special #ifdef'ed code,
 298      simply get the canonicalized name of the current directory.  */
 299   dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
 300 #endif
 301
 302   len = strlen (dir);
 303   if (SLASH_P (dir[len - 1]))
 304     {
 305       /* Remove the trailing slash unless this is a root directory
 306          (including a drive letter on non-Unix systems).  */
 307       if (!(len == 1)           /* "/" */
 308 #if defined(_WIN32) || defined(__MSDOS__)
 309           && !(!SLASH_P (*dir) && ROOTED_P (dir) && len <= 3)   /* "d:/" */
 310 #endif
 311           )
 312         len--;
 313     }
 314
 315   dir = savestring (dir, len);
 316   if (ROOTED_P (dir))
 317     current_directory = dir;
 318   else
 319     {
 320       if (SLASH_P (current_directory[strlen (current_directory) - 1]))
 321         current_directory = concat (current_directory, dir, NULL);
 322       else
 323         current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
 324       xfree (dir);
 325     }
 326
 327   /* Now simplify any occurrences of `.' and `..' in the pathname.  */
 328
 329   found_real_path = 0;
 330   for (p = current_directory; *p;)
 331     {
 332       if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2])))
 333         strcpy (p, p + 2);
 334       else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.'
 335                && (p[3] == 0 || SLASH_P (p[3])))
 336         {
 337           if (found_real_path)
 338             {
 339               /* Search backwards for the directory just before the "/.."
 340                  and obliterate it and the "/..".  */
 341               char *q = p;
 342               while (q != current_directory && !SLASH_P (q[-1]))
 343                 --q;
 344
 345               if (q == current_directory)
 346                 /* current_directory is
 347                    a relative pathname ("can't happen"--leave it alone).  */
 348                 ++p;
 349               else
 350                 {
 351                   strcpy (q - 1, p + 3);
 352                   p = q - 1;
 353                 }
 354             }
 355           else
 356             /* We are dealing with leading repetitions of "/..", for example
 357                "/../..", which is the Mach super-root.  */
 358             p += 3;
 359         }
 360       else
 361         {
 362           found_real_path = 1;
 363           ++p;
 364         }
 365     }
 366
 367   forget_cached_source_info ();
 368
 369   if (from_tty)
 370     pwd_command ((char *) 0, 1);
 371 }
 372 \f
 373 void
 374 source_command (char *args, int from_tty)
 375 {
 376   FILE *stream;
 377   struct cleanup *old_cleanups;
 378   char *file = args;
 379
 380   if (file == NULL)
 381     {
 382       error ("source command requires pathname of file to source.");
 383     }
 384
 385   file = tilde_expand (file);
 386   old_cleanups = make_cleanup (xfree, file);
 387
 388   stream = fopen (file, FOPEN_RT);
 389   if (!stream)
 390     {
 391       if (from_tty)
 392         perror_with_name (file);
 393       else
 394         return;
 395     }
 396
 397   script_from_file (stream, file);
 398
 399   do_cleanups (old_cleanups);
 400 }
 401
 402 /* ARGSUSED */
 403 static void
 404 echo_command (char *text, int from_tty)
 405 {
 406   char *p = text;
 407   register int c;
 408
 409   if (text)
 410     while ((c = *p++) != '\0')
 411       {
 412         if (c == '\\')
 413           {
 414             /* \ at end of argument is used after spaces
 415                so they won't be lost.  */
 416             if (*p == 0)
 417               return;
 418
 419             c = parse_escape (&p);
 420             if (c >= 0)
 421               printf_filtered ("%c", c);
 422           }
 423         else
 424           printf_filtered ("%c", c);
 425       }
 426
 427   /* Force this output to appear now.  */
 428   wrap_here ("");
 429   gdb_flush (gdb_stdout);
 430 }
 431
 432 /* ARGSUSED */
 433 static void
 434 shell_escape (char *arg, int from_tty)
 435 {
 436 #ifdef CANT_FORK
 437   /* If ARG is NULL, they want an inferior shell, but `system' just
 438      reports if the shell is available when passed a NULL arg.  */
 439   int rc = system (arg ? arg : "");
 440
 441   if (!arg)
 442     arg = "inferior shell";
 443
 444   if (rc == -1)
 445     {
 446       fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", arg,
 447                           safe_strerror (errno));
 448       gdb_flush (gdb_stderr);
 449     }
 450   else if (rc)
 451     {
 452       fprintf_unfiltered (gdb_stderr, "%s exited with status %d\n", arg, rc);
 453       gdb_flush (gdb_stderr);
 454     }
 455 #ifdef __DJGPP__
 456   /* Make sure to return to the directory GDB thinks it is, in case the
 457      shell command we just ran changed it.  */
 458   chdir (current_directory);
 459 #endif
 460 #else /* Can fork.  */
 461   int rc, status, pid;
 462   char *p, *user_shell;
 463
 464   if ((user_shell = (char *) getenv ("SHELL")) == NULL)
 465     user_shell = "/bin/sh";
 466
 467   /* Get the name of the shell for arg0 */
 468   if ((p = strrchr (user_shell, '/')) == NULL)
 469     p = user_shell;
 470   else
 471     p++;                        /* Get past '/' */
 472
 473   if ((pid = fork ()) == 0)
 474     {
 475       if (!arg)
 476         execl (user_shell, p, 0);
 477       else
 478         execl (user_shell, p, "-c", arg, 0);
 479
 480       fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell,
 481                           safe_strerror (errno));
 482       gdb_flush (gdb_stderr);
 483       _exit (0177);
 484     }
 485
 486   if (pid != -1)
 487     while ((rc = wait (&status)) != pid && rc != -1)
 488       ;
 489   else
 490     error ("Fork failed");
 491 #endif /* Can fork.  */
 492 }
 493
 494 static void
 495 make_command (char *arg, int from_tty)
 496 {
 497   char *p;
 498
 499   if (arg == 0)
 500     p = "make";
 501   else
 502     {
 503       p = xmalloc (sizeof ("make ") + strlen (arg));
 504       strcpy (p, "make ");
 505       strcpy (p + sizeof ("make ") - 1, arg);
 506     }
 507
 508   shell_escape (p, from_tty);
 509 }
 510
 511 /* ARGSUSED */
 512 static void
 513 show_user (char *args, int from_tty)
 514 {
 515   struct cmd_list_element *c;
 516   extern struct cmd_list_element *cmdlist;
 517
 518   if (args)
 519     {
 520       c = lookup_cmd (&args, cmdlist, "", 0, 1);
 521       if (c->class != class_user)
 522         error ("Not a user command.");
 523       show_user_1 (c, gdb_stdout);
 524     }
 525   else
 526     {
 527       for (c = cmdlist; c; c = c->next)
 528         {
 529           if (c->class == class_user)
 530             show_user_1 (c, gdb_stdout);
 531         }
 532     }
 533 }
 534
 535 /* Search through names of commands and documentations for a certain
 536    regular expression.
 537 */
 538 void
 539 apropos_command (char *searchstr, int from_tty)
 540 {
 541   extern struct cmd_list_element *cmdlist; /*This is the main command list*/
 542   regex_t pattern;
 543   char *pattern_fastmap;
 544   char errorbuffer[512];
 545   pattern_fastmap=calloc(256,sizeof(char));
 546   if (searchstr == NULL)
 547       error("REGEXP string is empty");
 548
 549   if (regcomp(&pattern,searchstr,REG_ICASE) == 0)
 550     {
 551       pattern.fastmap=pattern_fastmap;
 552       re_compile_fastmap(&pattern);
 553       apropos_cmd (gdb_stdout,cmdlist,&pattern,"");
 554     }
 555   else
 556     {
 557       regerror(regcomp(&pattern,searchstr,REG_ICASE),NULL,errorbuffer,512);
 558       error("Error in regular expression:%s",errorbuffer);
 559     }
 560   free(pattern_fastmap);
 561 }
 562 \f
 563 static void
 564 set_debug (char *arg, int from_tty)
 565 {
 566   printf_unfiltered ("\"set debug\" must be followed by the name of a print subcommand.\n");
 567   help_list (setdebuglist, "set debug ", -1, gdb_stdout);
 568 }
 569
 570 static void
 571 show_debug (char *args, int from_tty)
 572 {
 573   cmd_show_list (showdebuglist, from_tty, "");
 574 }
 575
 576 void
 577 init_cmd_lists (void)
 578 {
 579   cmdlist = NULL;
 580   infolist = NULL;
 581   enablelist = NULL;
 582   disablelist = NULL;
 583   togglelist = NULL;
 584   stoplist = NULL;
 585   deletelist = NULL;
 586   enablebreaklist = NULL;
 587   setlist = NULL;
 588   unsetlist = NULL;
 589   showlist = NULL;
 590   sethistlist = NULL;
 591   showhistlist = NULL;
 592   unsethistlist = NULL;
 593   maintenancelist = NULL;
 594   maintenanceinfolist = NULL;
 595   maintenanceprintlist = NULL;
 596   setprintlist = NULL;
 597   showprintlist = NULL;
 598   setchecklist = NULL;
 599   showchecklist = NULL;
 600 }
 601
 602 \f
 603 void
 604 init_cli_cmds (void)
 605 {
 606   struct cmd_list_element *c;
 607
 608   /* Define the classes of commands.
 609      They will appear in the help list in the reverse of this order.  */
 610
 611   add_cmd ("internals", class_maintenance, NO_FUNCTION,
 612            "Maintenance commands.\n\
 613 Some gdb commands are provided just for use by gdb maintainers.\n\
 614 These commands are subject to frequent change, and may not be as\n\
 615 well documented as user commands.",
 616            &cmdlist);
 617   add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
 618   add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
 619   add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\
 620 The commands in this class are those defined by the user.\n\
 621 Use the \"define\" command to define a command.", &cmdlist);
 622   add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist);
 623   if (!dbx_commands)
 624     add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
 625   add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
 626   add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
 627   add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
 628   add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\
 629 The stack is made up of stack frames.  Gdb assigns numbers to stack frames\n\
 630 counting from zero for the innermost (currently executing) frame.\n\n\
 631 At any time gdb identifies one frame as the \"selected\" frame.\n\
 632 Variable lookups are done with respect to the selected frame.\n\
 633 When the program being debugged stops, gdb selects the innermost frame.\n\
 634 The commands below can be used to select other frames by number or address.",
 635            &cmdlist);
 636   add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
 637
 638   /* Define general commands. */
 639
 640   add_com ("pwd", class_files, pwd_command,
 641         "Print working directory.  This is used for your program as well.");
 642   c = add_cmd ("cd", class_files, cd_command,
 643                "Set working directory to DIR for debugger and program being debugged.\n\
 644 The change does not take effect for the program being debugged\n\
 645 until the next time it is started.", &cmdlist);
 646   c->completer = filename_completer;
 647
 648   add_com ("echo", class_support, echo_command,
 649            "Print a constant string.  Give string as argument.\n\
 650 C escape sequences may be used in the argument.\n\
 651 No newline is added at the end of the argument;\n\
 652 use \"\\n\" if you want a newline to be printed.\n\
 653 Since leading and trailing whitespace are ignored in command arguments,\n\
 654 if you want to print some you must use \"\\\" before leading whitespace\n\
 655 to be printed or after trailing whitespace.");
 656   add_com ("document", class_support, document_command,
 657            "Document a user-defined command.\n\
 658 Give command name as argument.  Give documentation on following lines.\n\
 659 End with a line of just \"end\".");
 660   add_com ("define", class_support, define_command,
 661            "Define a new command name.  Command name is argument.\n\
 662 Definition appears on following lines, one command per line.\n\
 663 End with a line of just \"end\".\n\
 664 Use the \"document\" command to give documentation for the new command.\n\
 665 Commands defined in this way may have up to ten arguments.");
 666
 667 #ifdef __STDC__
 668   c = add_cmd ("source", class_support, source_command,
 669                "Read commands from a file named FILE.\n\
 670 Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
 671 when gdb is started.", &cmdlist);
 672 #else
 673   /* Punt file name, we can't help it easily.  */
 674   c = add_cmd ("source", class_support, source_command,
 675                "Read commands from a file named FILE.\n\
 676 Note that the file \".gdbinit\" is read automatically in this way\n\
 677 when gdb is started.", &cmdlist);
 678 #endif
 679   c->completer = filename_completer;
 680
 681   add_com ("quit", class_support, quit_command, "Exit gdb.");
 682   add_com ("help", class_support, help_command, "Print list of commands.");
 683   add_com_alias ("q", "quit", class_support, 1);
 684   add_com_alias ("h", "help", class_support, 1);
 685
 686   c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose,
 687                    "Set ",
 688                    &setlist),
 689     add_show_from_set (c, &showlist);
 690   c->function.sfunc = set_verbose;
 691   set_verbose (NULL, 0, c);
 692
 693   add_prefix_cmd ("history", class_support, set_history,
 694                   "Generic command for setting command history parameters.",
 695                   &sethistlist, "set history ", 0, &setlist);
 696   add_prefix_cmd ("history", class_support, show_history,
 697                   "Generic command for showing command history parameters.",
 698                   &showhistlist, "show history ", 0, &showlist);
 699
 700   add_show_from_set
 701     (add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p,
 702                   "Set history expansion on command input.\n\
 703 Without an argument, history expansion is enabled.", &sethistlist),
 704      &showhistlist);
 705
 706   add_prefix_cmd ("info", class_info, info_command,
 707      "Generic command for showing things about the program being debugged.",
 708                   &infolist, "info ", 0, &cmdlist);
 709   add_com_alias ("i", "info", class_info, 1);
 710
 711   add_com ("complete", class_obscure, complete_command,
 712            "List the completions for the rest of the line as a command.");
 713
 714   add_prefix_cmd ("show", class_info, show_command,
 715                   "Generic command for showing things about the debugger.",
 716                   &showlist, "show ", 0, &cmdlist);
 717   /* Another way to get at the same thing.  */
 718   add_info ("set", show_command, "Show all GDB settings.");
 719
 720   add_cmd ("commands", no_class, show_commands,
 721            "Show the history of commands you typed.\n\
 722 You can supply a command number to start with, or a `+' to start after\n\
 723 the previous command number shown.",
 724            &showlist);
 725
 726   add_cmd ("version", no_class, show_version,
 727            "Show what version of GDB this is.", &showlist);
 728
 729   add_com ("while", class_support, while_command,
 730            "Execute nested commands WHILE the conditional expression is non zero.\n\
 731 The conditional expression must follow the word `while' and must in turn be\n\
 732 followed by a new line.  The nested commands must be entered one per line,\n\
 733 and should be terminated by the word `end'.");
 734
 735   add_com ("if", class_support, if_command,
 736            "Execute nested commands once IF the conditional expression is non zero.\n\
 737 The conditional expression must follow the word `if' and must in turn be\n\
 738 followed by a new line.  The nested commands must be entered one per line,\n\
 739 and should be terminated by the word 'else' or `end'.  If an else clause\n\
 740 is used, the same rules apply to its nested commands as to the first ones.");
 741
 742   /* If target is open when baud changes, it doesn't take effect until the
 743      next open (I think, not sure).  */
 744   add_show_from_set (add_set_cmd ("remotebaud", no_class,
 745                                   var_zinteger, (char *) &baud_rate,
 746                                   "Set baud rate for remote serial I/O.\n\
 747 This value is used to set the speed of the serial port when debugging\n\
 748 using remote targets.", &setlist),
 749                      &showlist);
 750
 751   c = add_set_cmd ("remotedebug", no_class, var_zinteger,
 752                    (char *) &remote_debug,
 753                    "Set debugging of remote protocol.\n\
 754 When enabled, each packet sent or received with the remote target\n\
 755 is displayed.", &setlist);
 756   deprecate_cmd (c, "set debug remote");
 757   deprecate_cmd (add_show_from_set (c, &showlist), "show debug remote");
 758
 759   add_show_from_set (add_set_cmd ("remote", no_class, var_zinteger,
 760                                   (char *) &remote_debug,
 761                                   "Set debugging of remote protocol.\n\
 762 When enabled, each packet sent or received with the remote target\n\
 763 is displayed.", &setdebuglist),
 764                      &showdebuglist);
 765
 766   add_show_from_set (
 767                       add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout,
 768                                    "Set timeout limit to wait for target to respond.\n\
 769 This value is used to set the time limit for gdb to wait for a response\n\
 770 from the target.", &setlist),
 771                       &showlist);
 772
 773   add_prefix_cmd ("debug", no_class, set_debug,
 774                   "Generic command for setting gdb debugging flags",
 775                   &setdebuglist, "set debug ", 0, &setlist);
 776
 777   add_prefix_cmd ("debug", no_class, show_debug,
 778                   "Generic command for showing gdb debugging flags",
 779                   &showdebuglist, "show debug ", 0, &showlist);
 780
 781   add_com ("shell", class_support, shell_escape,
 782            "Execute the rest of the line as a shell command.  \n\
 783 With no arguments, run an inferior shell.");
 784
 785   /* NOTE: cagney/2000-03-20: Being able to enter ``(gdb) !ls'' would
 786      be a really useful feature.  Unfortunately, the below wont do
 787      this.  Instead it adds support for the form ``(gdb) ! ls''
 788      (i.e. the space is required).  If the ``!'' command below is
 789      added the complains about no ``!'' command would be replaced by
 790      complains about how the ``!'' command is broken :-) */
 791   if (xdb_commands)
 792     add_com_alias ("!", "shell", class_support, 0);
 793
 794   add_com ("make", class_support, make_command,
 795        "Run the ``make'' program using the rest of the line as arguments.");
 796   add_cmd ("user", no_class, show_user,
 797            "Show definitions of user defined commands.\n\
 798 Argument is the name of the user defined command.\n\
 799 With no argument, show definitions of all user defined commands.", &showlist);
 800   add_com ("apropos", class_support, apropos_command, "Search for commands matching a REGEXP");
 801 }