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5d4f09d83a
* src/system.h: Rename emit_bug_reporting_address() to emit_ancillary_info() and update it to not print the translation project address in en_* locales, and _do_ print it in the 'C' (and other) locales so that it's included in the default man page. Also mention how to invoke the texinfo documentation for each command. Also move the "hard-locale.h" include to the 8 files that now use it. * man/help2man: Strip the newly added texinfo reference from the --help output as a more verbose version is already added by help2man. Suggestion from C de-Avillez
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/* tty -- print the name of the terminal connected to standard input
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Copyright (C) 1990-2005, 2008-2009 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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/* Displays "not a tty" if stdin is not a terminal.
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Displays nothing if -s option is given.
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Exit status 0 if stdin is a tty, 1 if not, 2 if usage error,
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3 if write error.
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Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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#include <config.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include "system.h"
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#include "error.h"
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#include "quote.h"
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/* Exit statuses. */
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enum
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{
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TTY_FAILURE = 2,
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TTY_WRITE_ERROR = 3
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};
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/* The official name of this program (e.g., no `g' prefix). */
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#define PROGRAM_NAME "tty"
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#define AUTHORS proper_name ("David MacKenzie")
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/* If true, return an exit status but produce no output. */
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static bool silent;
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static struct option const longopts[] =
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{
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{"silent", no_argument, NULL, 's'},
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{"quiet", no_argument, NULL, 's'},
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{GETOPT_HELP_OPTION_DECL},
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{GETOPT_VERSION_OPTION_DECL},
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{NULL, 0, NULL, 0}
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};
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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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fprintf (stderr, _("Try `%s --help' for more information.\n"),
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program_name);
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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 file name of the terminal connected to standard input.\n\
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\n\
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-s, --silent, --quiet print nothing, only return an exit status\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 ();
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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 *tty;
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int optc;
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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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initialize_exit_failure (TTY_WRITE_ERROR);
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atexit (close_stdout);
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silent = false;
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while ((optc = getopt_long (argc, argv, "s", longopts, NULL)) != -1)
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{
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switch (optc)
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{
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case 's':
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silent = true;
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break;
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case_GETOPT_HELP_CHAR;
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case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
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default:
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usage (TTY_FAILURE);
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}
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}
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if (optind < argc)
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error (0, 0, _("extra operand %s"), quote (argv[optind]));
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tty = ttyname (STDIN_FILENO);
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if (!silent)
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{
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if (tty)
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puts (tty);
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else
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puts (_("not a tty"));
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}
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exit (isatty (STDIN_FILENO) ? EXIT_SUCCESS : EXIT_FAILURE);
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}
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