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e0afeb0099
Run "make update-copyright" and then... * tests/sample-test: Adjust to use the single most recent year. * tests/du/bind-mount-dir-cycle-v2.sh: Fix case in copyright message, so that year is updated automatically in future.
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* logname -- print user's login name
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Copyright (C) 1990-2015 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <getopt.h>
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#include "system.h"
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#include "error.h"
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#include "long-options.h"
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#include "quote.h"
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/* The official name of this program (e.g., no 'g' prefix). */
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#define PROGRAM_NAME "logname"
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#define AUTHORS proper_name ("FIXME: unknown")
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void
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usage (int status)
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{
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if (status != EXIT_SUCCESS)
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emit_try_help ();
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else
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{
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printf (_("Usage: %s [OPTION]\n"), program_name);
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fputs (_("\
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Print the name of the current user.\n\
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\n\
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"), stdout);
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fputs (HELP_OPTION_DESCRIPTION, stdout);
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fputs (VERSION_OPTION_DESCRIPTION, stdout);
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emit_ancillary_info (PROGRAM_NAME);
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}
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exit (status);
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}
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int
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main (int argc, char **argv)
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{
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char *cp;
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initialize_main (&argc, &argv);
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set_program_name (argv[0]);
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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atexit (close_stdout);
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parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, Version,
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usage, AUTHORS, (char const *) NULL);
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if (getopt_long (argc, argv, "", NULL, NULL) != -1)
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usage (EXIT_FAILURE);
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if (optind < argc)
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{
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error (0, 0, _("extra operand %s"), quote (argv[optind]));
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usage (EXIT_FAILURE);
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}
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/* POSIX requires using getlogin (or equivalent code) and prohibits
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using a fallback technique. */
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cp = getlogin ();
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if (! cp)
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error (EXIT_FAILURE, 0, _("no login name"));
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puts (cp);
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return EXIT_SUCCESS;
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}
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