63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/* $Id$ */
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/* Copyright (c) 2007 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Unix utils */
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/* utils is not free software; you can redistribute it and/or modify it under
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* the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0
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* Unported as published by the Creative Commons organization.
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*
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* utils is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the Creative Commons Attribution-NonCommercial-
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* ShareAlike 3.0 Unported license for more details.
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*
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* You should have received a copy of the Creative Commons Attribution-
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* NonCommercial-ShareAlike 3.0 along with utils; if not, browse to
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* http://creativecommons.org/licenses/by-nc-sa/3.0/ */
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#include <unistd.h>
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#include <stdio.h>
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/* tty */
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static int _tty_error(char const * message, int ret);
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static int _tty(void)
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{
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char * tty;
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if(isatty(0) == 1)
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{
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if((tty = ttyname(0)) == NULL)
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return _tty_error("ttyname", 2);
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printf("%s\n", tty);
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return 0;
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}
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printf("%s", "not a tty\n");
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return 1;
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}
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static int _tty_error(char const * message, int ret)
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{
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fputs("tty: ", stderr);
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perror(message);
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return ret;
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}
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/* usage */
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static int _usage(void)
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{
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fputs("Usage: tty\n", stderr);
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return 1;
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}
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/* main */
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int main(int argc, char * argv[])
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{
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if(argc != 1)
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return _usage();
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return _tty();
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}
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