builtins.h

   1 /* builtins.h -- What a builtin looks like, and where to find them. */
   2
   3 /* Copyright (C) 1987-2009 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "config.h"
  22
  23 #if defined (HAVE_UNISTD_H)
  24 #  ifdef _MINIX
  25 #    include <sys/types.h>
  26 #  endif
  27 #  include <unistd.h>
  28 #endif
  29
  30 #include "command.h"
  31 #include "general.h"
  32
  33 #if defined (ALIAS)
  34 #include "alias.h"
  35 #endif
  36
  37 /* Flags describing various things about a builtin. */
  38 #define BUILTIN_ENABLED 0x01    /* This builtin is enabled. */
  39 #define BUILTIN_DELETED 0x02    /* This has been deleted with enable -d. */
  40 #define STATIC_BUILTIN  0x04    /* This builtin is not dynamically loaded. */
  41 #define SPECIAL_BUILTIN 0x08    /* This is a Posix `special' builtin. */
  42 #define ASSIGNMENT_BUILTIN 0x10 /* This builtin takes assignment statements. */
  43 #define POSIX_BUILTIN   0x20    /* This builtins is special in the Posix command search order. */
  44
  45 #define BASE_INDENT     4
  46
  47 /* The thing that we build the array of builtins out of. */
  48 struct builtin {
  49   char *name;                   /* The name that the user types. */
  50   sh_builtin_func_t *function;  /* The address of the invoked function. */
  51   int flags;                    /* One of the #defines above. */
  52   char * const *long_doc;       /* NULL terminated array of strings. */
  53   const char *short_doc;        /* Short version of documenation. */
  54   char *handle;                 /* for future use */
  55 };
  56
  57 /* Found in builtins.c, created by builtins/mkbuiltins. */
  58 extern int num_shell_builtins;  /* Number of shell builtins. */
  59 extern struct builtin static_shell_builtins[];
  60 extern struct builtin *shell_builtins;
  61 extern struct builtin *current_builtin;