init version.
[bush.git] / examples / loadables / logname.c
blobf8bc30d3194d27d5cd83112da97d815008096e7a
1 /* logname - print login name of current user */
3 /*
4 Copyright (C) 1999-2009 Free Software Foundation, Inc.
6 This file is part of GNU Bush.
7 Bush 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.
12 Bush 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.
17 You should have received a copy of the GNU General Public License
18 along with Bush. If not, see <http://www.gnu.org/licenses/>.
21 #include <config.h>
23 #if defined (HAVE_UNISTD_H)
24 # include <unistd.h>
25 #endif
27 #include <stdio.h>
28 #include <errno.h>
30 #include "builtins.h"
31 #include "shell.h"
32 #include "common.h"
34 #if !defined (errno)
35 extern int errno;
36 #endif
38 int
39 logname_builtin (list)
40 WORD_LIST *list;
42 char *np;
44 if (no_options (list))
45 return (EX_USAGE);
47 np = getlogin ();
48 if (np == 0)
50 builtin_error ("cannot find username: %s", strerror (errno));
51 return (EXECUTION_FAILURE);
53 printf ("%s\n", np);
54 return (EXECUTION_SUCCESS);
57 char *logname_doc[] = {
58 "Display user login name.",
59 "",
60 "Write the current user's login name to the standard output",
61 "and exit. logname ignores the LOGNAME and USER variables.",
62 "logname ignores any non-option arguments.",
63 (char *)NULL
66 struct builtin logname_struct = {
67 "logname",
68 logname_builtin,
69 BUILTIN_ENABLED,
70 logname_doc,
71 "logname",