builtins/colon.def

   1 This file is colon.def, from which is created colon.c.
   2 It implements the builtin ":" in Bush.
   3
   4 Copyright (C) 1987-2019 Free Software Foundation, Inc.
   5
   6 This file is part of GNU Bush, the Bourne Again SHell.
   7
   8 Bush is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 Bush is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with Bush.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 $PRODUCES colon.c
  22
  23 $BUILTIN :
  24 $DOCNAME colon
  25 $FUNCTION colon_builtin
  26 $SHORT_DOC :
  27 Null command.
  28
  29 No effect; the command does nothing.
  30
  31 Exit Status:
  32 Always succeeds.
  33 $END
  34
  35 $BUILTIN true
  36 $FUNCTION colon_builtin
  37 $SHORT_DOC true
  38 Return a successful result.
  39
  40 Exit Status:
  41 Always succeeds.
  42 $END
  43
  44 $BUILTIN false
  45 $FUNCTION false_builtin
  46 $SHORT_DOC false
  47 Return an unsuccessful result.
  48
  49 Exit Status:
  50 Always fails.
  51 $END
  52
  53 #include <config.h>
  54
  55 #if defined (HAVE_UNISTD_H)
  56 #  include <unistd.h>
  57 #endif
  58
  59 #include "../src/bushansi.h"
  60 #include "../src/shell.h"
  61
  62 /* Return a successful result. */
  63 int
  64 colon_builtin (ignore)
  65      WORD_LIST *ignore;
  66 {
  67   return (0);
  68 }
  69
  70 /* Return an unsuccessful result. */
  71 int
  72 false_builtin (ignore)
  73      WORD_LIST *ignore;
  74 {
  75   return (1);
  76 }