1 /* whoami -- print effective userid
2 Copyright (C) 89, 90, 91, 92, 93, 1994 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* Equivalent to `id -un'. */
19 /* Written by Richard Mlynarik. */
22 #if defined (CONFIG_BROKETS)
23 /* We use <config.h> instead of "config.h" so that a compilation
24 using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
25 (which it would do because it found this file in $srcdir). */
33 #include <sys/types.h>
40 /* The name this program was run with. */
43 /* If non-zero, display usage information and exit. */
46 /* If non-zero, print the version on standard output and exit. */
47 static int show_version;
49 static struct option const long_options[] =
51 {"help", no_argument, &show_help, 1},
52 {"version", no_argument, &show_version, 1},
61 fprintf (stderr, "Try `%s --help' for more information.\n",
65 printf ("Usage: %s [OPTION]...\n", program_name);
68 --help display this help and exit\n\
69 --version output version information and exit\n\
82 register struct passwd *pw;
86 program_name = argv[0];
88 while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF)
102 printf ("%s\n", version_string);
120 fprintf (stderr, "%s: cannot find username for UID %u\n",
121 program_name, (unsigned) uid);