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Annotation of 43BSDReno/usr.bin/tty/tty.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: char copyright[] =
                     22: "@(#) Copyright (c) 1988 Regents of the University of California.\n\
                     23:  All rights reserved.\n";
                     24: #endif /* not lint */
                     25: 
                     26: #ifndef lint
                     27: static char sccsid[] = "@(#)tty.c      4.4 (Berkeley) 6/1/90";
                     28: #endif /* not lint */
                     29: 
                     30: #include <stdio.h>
                     31: 
                     32: main(argc, argv)
                     33:        int argc;
                     34:        char **argv;
                     35: {
                     36:        int ch, sflag;
                     37:        char *t, *ttyname();
                     38: 
                     39:        sflag = 0;
                     40:        while ((ch = getopt(argc, argv, "s")) != EOF)
                     41:                switch((char)ch) {
                     42:                case 's':
                     43:                        sflag = 1;
                     44:                        break;
                     45:                case '?':
                     46:                default:
                     47:                        fputs("usage: tty [-s]\n", stderr);
                     48:                        exit(2);
                     49:                }
                     50: 
                     51:        t = ttyname(0);
                     52:        if (!sflag)
                     53:                puts(t ? t : "not a tty");
                     54:        exit(t ? 0 : 1);
                     55: }

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