gdb/cli/cli-cmds.c

   1 /* GDB CLI commands.
   2    Copyright 2000, 2001 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 #include "filenames.h"          /* for DOSish file names */
  27
  28 #ifdef UI_OUT
  29 #include "ui-out.h"
  30 #endif
  31
  32 #include "top.h"
  33 #include "cli/cli-decode.h"
  34 #include "cli/cli-script.h"
  35 #include "cli/cli-setshow.h"
  36 #include "cli/cli-cmds.h"
  37
  38 #ifndef GDBINIT_FILENAME
  39 #define GDBINIT_FILENAME        ".gdbinit"
  40 #endif
  41
  42 /* FIXME: this should be auto-configured!  */
  43 #ifdef __MSDOS__
  44 # define CANT_FORK
  45 #endif
  46
  47 /* From gdb/top.c */
  48
  49 extern void dont_repeat (void);
  50
  51 extern void set_verbose (char *, int, struct cmd_list_element *);
  52
  53 extern void show_history (char *, int);
  54
  55 extern void set_history (char *, int);
  56
  57 extern void show_commands (char *, int);
  58
  59 /* Prototypes for local functions */
  60
  61 static void complete_command (char *, int);
  62
  63 static void echo_command (char *, int);
  64
  65 static void pwd_command (char *, int);
  66
  67 static void show_version (char *, int);
  68
  69 static void validate_comname (char *);
  70
  71 static void help_command (char *, int);
  72
  73 static void show_command (char *, int);
  74
  75 static void info_command (char *, int);
  76
  77 static void show_debug (char *, int);
  78
  79 static void set_debug (char *, int);
  80
  81 static void show_user (char *, int);
  82
  83 static void make_command (char *, int);
  84
  85 static void shell_escape (char *, int);
  86
  87 void apropos_command (char *, int);
  88 \f
  89 /* Define all cmd_list_elements.  */
  90
  91 /* Chain containing all defined commands.  */
  92
  93 struct cmd_list_element *cmdlist;
  94
  95 /* Chain containing all defined info subcommands.  */
  96
  97 struct cmd_list_element *infolist;
  98
  99 /* Chain containing all defined enable subcommands. */
 100
 101 struct cmd_list_element *enablelist;
 102
 103 /* Chain containing all defined disable subcommands. */
 104
 105 struct cmd_list_element *disablelist;
 106
 107 /* Chain containing all defined toggle subcommands. */
 108
 109 struct cmd_list_element *togglelist;
 110
 111 /* Chain containing all defined stop subcommands. */
 112
 113 struct cmd_list_element *stoplist;
 114
 115 /* Chain containing all defined delete subcommands. */
 116
 117 struct cmd_list_element *deletelist;
 118
 119 /* Chain containing all defined "enable breakpoint" subcommands. */
 120
 121 struct cmd_list_element *enablebreaklist;
 122
 123 /* Chain containing all defined set subcommands */
 124
 125 struct cmd_list_element *setlist;
 126
 127 /* Chain containing all defined unset subcommands */
 128
 129 struct cmd_list_element *unsetlist;
 130
 131 /* Chain containing all defined show subcommands.  */
 132
 133 struct cmd_list_element *showlist;
 134
 135 /* Chain containing all defined \"set history\".  */
 136
 137 struct cmd_list_element *sethistlist;
 138
 139 /* Chain containing all defined \"show history\".  */
 140
 141 struct cmd_list_element *showhistlist;
 142
 143 /* Chain containing all defined \"unset history\".  */
 144
 145 struct cmd_list_element *unsethistlist;
 146
 147 /* Chain containing all defined maintenance subcommands. */
 148
 149 struct cmd_list_element *maintenancelist;
 150
 151 /* Chain containing all defined "maintenance info" subcommands. */
 152
 153 struct cmd_list_element *maintenanceinfolist;
 154
 155 /* Chain containing all defined "maintenance print" subcommands. */
 156
 157 struct cmd_list_element *maintenanceprintlist;
 158
 159 struct cmd_list_element *setprintlist;
 160
 161 struct cmd_list_element *showprintlist;
 162
 163 struct cmd_list_element *setdebuglist;
 164
 165 struct cmd_list_element *showdebuglist;
 166
 167 struct cmd_list_element *setchecklist;
 168
 169 struct cmd_list_element *showchecklist;
 170 \f
 171 /* Utility used everywhere when at least one argument is needed and
 172    none is supplied. */
 173
 174 void
 175 error_no_arg (char *why)
 176 {
 177   error ("Argument required (%s).", why);
 178 }
 179
 180 /* The "info" command is defined as a prefix, with allow_unknown = 0.
 181    Therefore, its own definition is called only for "info" with no args.  */
 182
 183 /* ARGSUSED */
 184 static void
 185 info_command (char *arg, int from_tty)
 186 {
 187   printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
 188   help_list (infolist, "info ", -1, gdb_stdout);
 189 }
 190
 191 /* The "show" command with no arguments shows all the settings.  */
 192
 193 /* ARGSUSED */
 194 static void
 195 show_command (char *arg, int from_tty)
 196 {
 197   cmd_show_list (showlist, from_tty, "");
 198 }
 199 \f
 200 /* Provide documentation on command or list given by COMMAND.  FROM_TTY
 201    is ignored.  */
 202
 203 /* ARGSUSED */
 204 static void
 205 help_command (char *command, int from_tty)
 206 {
 207   help_cmd (command, gdb_stdout);
 208 }
 209 \f
 210 /* The "complete" command is used by Emacs to implement completion.  */
 211
 212 /* ARGSUSED */
 213 static void
 214 complete_command (char *arg, int from_tty)
 215 {
 216   int i;
 217   int argpoint;
 218   char *completion;
 219
 220   dont_repeat ();
 221
 222   if (arg == NULL)
 223     arg = "";
 224   argpoint = strlen (arg);
 225
 226   for (completion = line_completion_function (arg, i = 0, arg, argpoint);
 227        completion;
 228        completion = line_completion_function (arg, ++i, arg, argpoint))
 229     {
 230       printf_unfiltered ("%s\n", completion);
 231       xfree (completion);
 232     }
 233 }
 234
 235 int is_complete_command (void (*func) (char *args, int from_tty))
 236 {
 237   return func == complete_command;
 238 }
 239
 240 /* ARGSUSED */
 241 static void
 242 show_version (char *args, int from_tty)
 243 {
 244   immediate_quit++;
 245   print_gdb_version (gdb_stdout);
 246   printf_filtered ("\n");
 247   immediate_quit--;
 248 }
 249
 250 /* Handle the quit command.  */
 251
 252 void
 253 quit_command (char *args, int from_tty)
 254 {
 255   if (!quit_confirm ())
 256     error ("Not confirmed.");
 257   quit_force (args, from_tty);
 258 }
 259
 260 /* ARGSUSED */
 261 static void
 262 pwd_command (char *args, int from_tty)
 263 {
 264   if (args)
 265     error ("The \"pwd\" command does not take an argument: %s", args);
 266   getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
 267
 268   if (!STREQ (gdb_dirbuf, current_directory))
 269     printf_unfiltered ("Working directory %s\n (canonically %s).\n",
 270                        current_directory, gdb_dirbuf);
 271   else
 272     printf_unfiltered ("Working directory %s.\n", current_directory);
 273 }
 274
 275 void
 276 cd_command (char *dir, int from_tty)
 277 {
 278   int len;
 279   /* Found something other than leading repetitions of "/..".  */
 280   int found_real_path;
 281   char *p;
 282
 283   /* If the new directory is absolute, repeat is a no-op; if relative,
 284      repeat might be useful but is more likely to be a mistake.  */
 285   dont_repeat ();
 286
 287   if (dir == 0)
 288     error_no_arg ("new working directory");
 289
 290   dir = tilde_expand (dir);
 291   make_cleanup (xfree, dir);
 292
 293   if (chdir (dir) < 0)
 294     perror_with_name (dir);
 295
 296 #if HAVE_DOS_BASED_FILE_SYSTEM
 297   /* There's too much mess with DOSish names like "d:", "d:.",
 298      "d:./foo" etc.  Instead of having lots of special #ifdef'ed code,
 299      simply get the canonicalized name of the current directory.  */
 300   dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
 301 #endif
 302
 303   len = strlen (dir);
 304   if (IS_DIR_SEPARATOR (dir[len - 1]))
 305     {
 306       /* Remove the trailing slash unless this is a root directory
 307          (including a drive letter on non-Unix systems).  */
 308       if (!(len == 1)           /* "/" */
 309 #if HAVE_DOS_BASED_FILE_SYSTEM
 310           && !(len == 3 && dir[1] == ':') /* "d:/" */
 311 #endif
 312           )
 313         len--;
 314     }
 315
 316   dir = savestring (dir, len);
 317   if (IS_ABSOLUTE_PATH (dir))
 318     current_directory = dir;
 319   else
 320     {
 321       if (IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1]))
 322         current_directory = concat (current_directory, dir, NULL);
 323       else
 324         current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
 325       xfree (dir);
 326     }
 327
 328   /* Now simplify any occurrences of `.' and `..' in the pathname.  */
 329
 330   found_real_path = 0;
 331   for (p = current_directory; *p;)
 332     {
 333       if (IS_DIR_SEPARATOR (p[0]) && p[1] == '.'
 334           && (p[2] == 0 || IS_DIR_SEPARATOR (p[2])))
 335         strcpy (p, p + 2);
 336       else if (IS_DIR_SEPARATOR (p[0]) && p[1] == '.' && p[2] == '.'
 337                && (p[3] == 0 || IS_DIR_SEPARATOR (p[3])))
 338         {
 339           if (found_real_path)
 340             {
 341               /* Search backwards for the directory just before the "/.."
 342                  and obliterate it and the "/..".  */
 343               char *q = p;
 344               while (q != current_directory && !IS_DIR_SEPARATOR (q[-1]))
 345                 --q;
 346
 347               if (q == current_directory)
 348                 /* current_directory is
 349                    a relative pathname ("can't happen"--leave it alone).  */
 350                 ++p;
 351               else
 352                 {
 353                   strcpy (q - 1, p + 3);
 354                   p = q - 1;
 355                 }
 356             }
 357           else
 358             /* We are dealing with leading repetitions of "/..", for example
 359                "/../..", which is the Mach super-root.  */
 360             p += 3;
 361         }
 362       else
 363         {
 364           found_real_path = 1;
 365           ++p;
 366         }
 367     }
 368
 369   forget_cached_source_info ();
 370
 371   if (from_tty)
 372     pwd_command ((char *) 0, 1);
 373 }
 374 \f
 375 void
 376 source_command (char *args, int from_tty)
 377 {
 378   FILE *stream;
 379   struct cleanup *old_cleanups;
 380   char *file = args;
 381
 382   if (file == NULL)
 383     {
 384       error ("source command requires pathname of file to source.");
 385     }
 386
 387   file = tilde_expand (file);
 388   old_cleanups = make_cleanup (xfree, file);
 389
 390   stream = fopen (file, FOPEN_RT);
 391   if (!stream)
 392     {
 393       if (from_tty)
 394         perror_with_name (file);
 395       else
 396         return;
 397     }
 398
 399   script_from_file (stream, file);
 400
 401   do_cleanups (old_cleanups);
 402 }
 403
 404 /* ARGSUSED */
 405 static void
 406 echo_command (char *text, int from_tty)
 407 {
 408   char *p = text;
 409   register int c;
 410
 411   if (text)
 412     while ((c = *p++) != '\0')
 413       {
 414         if (c == '\\')
 415           {
 416             /* \ at end of argument is used after spaces
 417                so they won't be lost.  */
 418             if (*p == 0)
 419               return;
 420
 421             c = parse_escape (&p);
 422             if (c >= 0)
 423               printf_filtered ("%c", c);
 424           }
 425         else
 426           printf_filtered ("%c", c);
 427       }
 428
 429   /* Force this output to appear now.  */
 430   wrap_here ("");
 431   gdb_flush (gdb_stdout);
 432 }
 433
 434 /* ARGSUSED */
 435 static void
 436 shell_escape (char *arg, int from_tty)
 437 {
 438 #ifdef CANT_FORK
 439   /* If ARG is NULL, they want an inferior shell, but `system' just
 440      reports if the shell is available when passed a NULL arg.  */
 441   int rc = system (arg ? arg : "");
 442
 443   if (!arg)
 444     arg = "inferior shell";
 445
 446   if (rc == -1)
 447     {
 448       fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", arg,
 449                           safe_strerror (errno));
 450       gdb_flush (gdb_stderr);
 451     }
 452   else if (rc)
 453     {
 454       fprintf_unfiltered (gdb_stderr, "%s exited with status %d\n", arg, rc);
 455       gdb_flush (gdb_stderr);
 456     }
 457 #ifdef __DJGPP__
 458   /* Make sure to return to the directory GDB thinks it is, in case the
 459      shell command we just ran changed it.  */
 460   chdir (current_directory);
 461 #endif
 462 #else /* Can fork.  */
 463   int rc, status, pid;
 464   char *p, *user_shell;
 465
 466   if ((user_shell = (char *) getenv ("SHELL")) == NULL)
 467     user_shell = "/bin/sh";
 468
 469   /* Get the name of the shell for arg0 */
 470   if ((p = strrchr (user_shell, '/')) == NULL)
 471     p = user_shell;
 472   else
 473     p++;                        /* Get past '/' */
 474
 475   if ((pid = fork ()) == 0)
 476     {
 477       if (!arg)
 478         execl (user_shell, p, 0);
 479       else
 480         execl (user_shell, p, "-c", arg, 0);
 481
 482       fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell,
 483                           safe_strerror (errno));
 484       gdb_flush (gdb_stderr);
 485       _exit (0177);
 486     }
 487
 488   if (pid != -1)
 489     while ((rc = wait (&status)) != pid && rc != -1)
 490       ;
 491   else
 492     error ("Fork failed");
 493 #endif /* Can fork.  */
 494 }
 495
 496 static void
 497 make_command (char *arg, int from_tty)
 498 {
 499   char *p;
 500
 501   if (arg == 0)
 502     p = "make";
 503   else
 504     {
 505       p = xmalloc (sizeof ("make ") + strlen (arg));
 506       strcpy (p, "make ");
 507       strcpy (p + sizeof ("make ") - 1, arg);
 508     }
 509
 510   shell_escape (p, from_tty);
 511 }
 512
 513 /* ARGSUSED */
 514 static void
 515 show_user (char *args, int from_tty)
 516 {
 517   struct cmd_list_element *c;
 518   extern struct cmd_list_element *cmdlist;
 519
 520   if (args)
 521     {
 522       c = lookup_cmd (&args, cmdlist, "", 0, 1);
 523       if (c->class != class_user)
 524         error ("Not a user command.");
 525       show_user_1 (c, gdb_stdout);
 526     }
 527   else
 528     {
 529       for (c = cmdlist; c; c = c->next)
 530         {
 531           if (c->class == class_user)
 532             show_user_1 (c, gdb_stdout);
 533         }
 534     }
 535 }
 536
 537 /* Search through names of commands and documentations for a certain
 538    regular expression.
 539 */
 540 void
 541 apropos_command (char *searchstr, int from_tty)
 542 {
 543   extern struct cmd_list_element *cmdlist; /*This is the main command list*/
 544   regex_t pattern;
 545   char *pattern_fastmap;
 546   char errorbuffer[512];
 547   pattern_fastmap = xcalloc (256, sizeof (char));
 548   if (searchstr == NULL)
 549       error("REGEXP string is empty");
 550
 551   if (regcomp(&pattern,searchstr,REG_ICASE) == 0)
 552     {
 553       pattern.fastmap=pattern_fastmap;
 554       re_compile_fastmap(&pattern);
 555       apropos_cmd (gdb_stdout,cmdlist,&pattern,"");
 556     }
 557   else
 558     {
 559       regerror(regcomp(&pattern,searchstr,REG_ICASE),NULL,errorbuffer,512);
 560       error("Error in regular expression:%s",errorbuffer);
 561     }
 562   xfree (pattern_fastmap);
 563 }
 564 \f
 565 static void
 566 set_debug (char *arg, int from_tty)
 567 {
 568   printf_unfiltered ("\"set debug\" must be followed by the name of a print subcommand.\n");
 569   help_list (setdebuglist, "set debug ", -1, gdb_stdout);
 570 }
 571
 572 static void
 573 show_debug (char *args, int from_tty)
 574 {
 575   cmd_show_list (showdebuglist, from_tty, "");
 576 }
 577
 578 void
 579 init_cmd_lists (void)
 580 {
 581   cmdlist = NULL;
 582   infolist = NULL;
 583   enablelist = NULL;
 584   disablelist = NULL;
 585   togglelist = NULL;
 586   stoplist = NULL;
 587   deletelist = NULL;
 588   enablebreaklist = NULL;
 589   setlist = NULL;
 590   unsetlist = NULL;
 591   showlist = NULL;
 592   sethistlist = NULL;
 593   showhistlist = NULL;
 594   unsethistlist = NULL;
 595   maintenancelist = NULL;
 596   maintenanceinfolist = NULL;
 597   maintenanceprintlist = NULL;
 598   setprintlist = NULL;
 599   showprintlist = NULL;
 600   setchecklist = NULL;
 601   showchecklist = NULL;
 602 }
 603
 604 \f
 605 void
 606 init_cli_cmds (void)
 607 {
 608   struct cmd_list_element *c;
 609
 610   /* Define the classes of commands.
 611      They will appear in the help list in the reverse of this order.  */
 612
 613   add_cmd ("internals", class_maintenance, NO_FUNCTION,
 614            "Maintenance commands.\n\
 615 Some gdb commands are provided just for use by gdb maintainers.\n\
 616 These commands are subject to frequent change, and may not be as\n\
 617 well documented as user commands.",
 618            &cmdlist);
 619   add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
 620   add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
 621   add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\
 622 The commands in this class are those defined by the user.\n\
 623 Use the \"define\" command to define a command.", &cmdlist);
 624   add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist);
 625   if (!dbx_commands)
 626     add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
 627   add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
 628   add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
 629   add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
 630   add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\
 631 The stack is made up of stack frames.  Gdb assigns numbers to stack frames\n\
 632 counting from zero for the innermost (currently executing) frame.\n\n\
 633 At any time gdb identifies one frame as the \"selected\" frame.\n\
 634 Variable lookups are done with respect to the selected frame.\n\
 635 When the program being debugged stops, gdb selects the innermost frame.\n\
 636 The commands below can be used to select other frames by number or address.",
 637            &cmdlist);
 638   add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
 639
 640   /* Define general commands. */
 641
 642   add_com ("pwd", class_files, pwd_command,
 643         "Print working directory.  This is used for your program as well.");
 644   c = add_cmd ("cd", class_files, cd_command,
 645                "Set working directory to DIR for debugger and program being debugged.\n\
 646 The change does not take effect for the program being debugged\n\
 647 until the next time it is started.", &cmdlist);
 648   c->completer = filename_completer;
 649
 650   add_com ("echo", class_support, echo_command,
 651            "Print a constant string.  Give string as argument.\n\
 652 C escape sequences may be used in the argument.\n\
 653 No newline is added at the end of the argument;\n\
 654 use \"\\n\" if you want a newline to be printed.\n\
 655 Since leading and trailing whitespace are ignored in command arguments,\n\
 656 if you want to print some you must use \"\\\" before leading whitespace\n\
 657 to be printed or after trailing whitespace.");
 658   add_com ("document", class_support, document_command,
 659            "Document a user-defined command.\n\
 660 Give command name as argument.  Give documentation on following lines.\n\
 661 End with a line of just \"end\".");
 662   add_com ("define", class_support, define_command,
 663            "Define a new command name.  Command name is argument.\n\
 664 Definition appears on following lines, one command per line.\n\
 665 End with a line of just \"end\".\n\
 666 Use the \"document\" command to give documentation for the new command.\n\
 667 Commands defined in this way may have up to ten arguments.");
 668
 669   c = add_cmd ("source", class_support, source_command,
 670                "Read commands from a file named FILE.\n\
 671 Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
 672 when gdb is started.", &cmdlist);
 673   c->completer = filename_completer;
 674
 675   add_com ("quit", class_support, quit_command, "Exit gdb.");
 676   add_com ("help", class_support, help_command, "Print list of commands.");
 677   add_com_alias ("q", "quit", class_support, 1);
 678   add_com_alias ("h", "help", class_support, 1);
 679
 680   c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose,
 681                    "Set ",
 682                    &setlist),
 683     add_show_from_set (c, &showlist);
 684   c->function.sfunc = set_verbose;
 685   set_verbose (NULL, 0, c);
 686
 687   add_prefix_cmd ("history", class_support, set_history,
 688                   "Generic command for setting command history parameters.",
 689                   &sethistlist, "set history ", 0, &setlist);
 690   add_prefix_cmd ("history", class_support, show_history,
 691                   "Generic command for showing command history parameters.",
 692                   &showhistlist, "show history ", 0, &showlist);
 693
 694   add_show_from_set
 695     (add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p,
 696                   "Set history expansion on command input.\n\
 697 Without an argument, history expansion is enabled.", &sethistlist),
 698      &showhistlist);
 699
 700   add_prefix_cmd ("info", class_info, info_command,
 701      "Generic command for showing things about the program being debugged.",
 702                   &infolist, "info ", 0, &cmdlist);
 703   add_com_alias ("i", "info", class_info, 1);
 704
 705   add_com ("complete", class_obscure, complete_command,
 706            "List the completions for the rest of the line as a command.");
 707
 708   add_prefix_cmd ("show", class_info, show_command,
 709                   "Generic command for showing things about the debugger.",
 710                   &showlist, "show ", 0, &cmdlist);
 711   /* Another way to get at the same thing.  */
 712   add_info ("set", show_command, "Show all GDB settings.");
 713
 714   add_cmd ("commands", no_class, show_commands,
 715            "Show the history of commands you typed.\n\
 716 You can supply a command number to start with, or a `+' to start after\n\
 717 the previous command number shown.",
 718            &showlist);
 719
 720   add_cmd ("version", no_class, show_version,
 721            "Show what version of GDB this is.", &showlist);
 722
 723   add_com ("while", class_support, while_command,
 724            "Execute nested commands WHILE the conditional expression is non zero.\n\
 725 The conditional expression must follow the word `while' and must in turn be\n\
 726 followed by a new line.  The nested commands must be entered one per line,\n\
 727 and should be terminated by the word `end'.");
 728
 729   add_com ("if", class_support, if_command,
 730            "Execute nested commands once IF the conditional expression is non zero.\n\
 731 The conditional expression must follow the word `if' 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 'else' or `end'.  If an else clause\n\
 734 is used, the same rules apply to its nested commands as to the first ones.");
 735
 736   /* If target is open when baud changes, it doesn't take effect until the
 737      next open (I think, not sure).  */
 738   add_show_from_set (add_set_cmd ("remotebaud", no_class,
 739                                   var_zinteger, (char *) &baud_rate,
 740                                   "Set baud rate for remote serial I/O.\n\
 741 This value is used to set the speed of the serial port when debugging\n\
 742 using remote targets.", &setlist),
 743                      &showlist);
 744
 745   c = add_set_cmd ("remotedebug", no_class, var_zinteger,
 746                    (char *) &remote_debug,
 747                    "Set debugging of remote protocol.\n\
 748 When enabled, each packet sent or received with the remote target\n\
 749 is displayed.", &setlist);
 750   deprecate_cmd (c, "set debug remote");
 751   deprecate_cmd (add_show_from_set (c, &showlist), "show debug remote");
 752
 753   add_show_from_set (add_set_cmd ("remote", no_class, var_zinteger,
 754                                   (char *) &remote_debug,
 755                                   "Set debugging of remote protocol.\n\
 756 When enabled, each packet sent or received with the remote target\n\
 757 is displayed.", &setdebuglist),
 758                      &showdebuglist);
 759
 760   add_show_from_set (
 761                       add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout,
 762                                    "Set timeout limit to wait for target to respond.\n\
 763 This value is used to set the time limit for gdb to wait for a response\n\
 764 from the target.", &setlist),
 765                       &showlist);
 766
 767   add_prefix_cmd ("debug", no_class, set_debug,
 768                   "Generic command for setting gdb debugging flags",
 769                   &setdebuglist, "set debug ", 0, &setlist);
 770
 771   add_prefix_cmd ("debug", no_class, show_debug,
 772                   "Generic command for showing gdb debugging flags",
 773                   &showdebuglist, "show debug ", 0, &showlist);
 774
 775   c = add_com ("shell", class_support, shell_escape,
 776                "Execute the rest of the line as a shell command.  \n\
 777 With no arguments, run an inferior shell.");
 778   c->completer = filename_completer;
 779
 780   /* NOTE: cagney/2000-03-20: Being able to enter ``(gdb) !ls'' would
 781      be a really useful feature.  Unfortunately, the below wont do
 782      this.  Instead it adds support for the form ``(gdb) ! ls''
 783      (i.e. the space is required).  If the ``!'' command below is
 784      added the complains about no ``!'' command would be replaced by
 785      complains about how the ``!'' command is broken :-) */
 786   if (xdb_commands)
 787     add_com_alias ("!", "shell", class_support, 0);
 788
 789   c = add_com ("make", class_support, make_command,
 790           "Run the ``make'' program using the rest of the line as arguments.");
 791   c->completer = filename_completer;
 792   add_cmd ("user", no_class, show_user,
 793            "Show definitions of user defined commands.\n\
 794 Argument is the name of the user defined command.\n\
 795 With no argument, show definitions of all user defined commands.", &showlist);
 796   add_com ("apropos", class_support, apropos_command, "Search for commands matching a REGEXP");
 797 }