examples/loadables/whoami.c

   1 /*
   2  * whoami - print out username of current user
   3  */
   4
   5 /*
   6    Copyright (C) 1999-2009 Free Software Foundation, Inc.
   7
   8    This file is part of GNU Bash.
   9    Bash is free software: you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation, either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    Bash is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include <config.h>
  24 #include <stdio.h>
  25
  26 #include "builtins.h"
  27 #include "shell.h"
  28 #include "bashgetopt.h"
  29 #include "common.h"
  30
  31 whoami_builtin (list)
  32      WORD_LIST *list;
  33 {
  34   int opt;
  35
  36   reset_internal_getopt ();
  37   while ((opt = internal_getopt (list, "")) != -1)
  38     {
  39       switch (opt)
  40         {
  41         default:
  42           builtin_usage ();
  43           return (EX_USAGE);
  44         }
  45     }
  46   list = loptend;
  47   if (list)
  48     {
  49       builtin_usage ();
  50       return (EX_USAGE);
  51     }
  52
  53   if (current_user.user_name == 0)
  54     get_current_user_info ();
  55   printf ("%s\n", current_user.user_name);
  56   return (EXECUTION_SUCCESS);
  57 }
  58
  59 char *whoami_doc[] = {
  60         "Print user name",
  61         "",
  62         "Display name of current user.",
  63         (char *)NULL
  64 };
  65
  66 struct builtin whoami_struct = {
  67         "whoami",
  68         whoami_builtin,
  69         BUILTIN_ENABLED,
  70         whoami_doc,
  71         "whoami",
  72         0
  73 };