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Annotation of 43BSDTahoe/usr.bin/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 the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: char copyright[] =
                     20: "@(#) Copyright (c) 1988 Regents of the University of California.\n\
                     21:  All rights reserved.\n";
                     22: #endif /* not lint */
                     23: 
                     24: #ifndef lint
                     25: static char sccsid[] = "@(#)tty.c      4.2 (Berkeley) 7/6/88";
                     26: #endif /* not lint */
                     27: 
                     28: #include <stdio.h>
                     29: 
                     30: main(argc, argv)
                     31:        int argc;
                     32:        char **argv;
                     33: {
                     34:        int ch, sflag;
                     35:        char *t, *ttyname();
                     36: 
                     37:        sflag = 0;
                     38:        while ((ch = getopt(argc, argv, "s")) != EOF)
                     39:                switch((char)ch) {
                     40:                case 's':
                     41:                        sflag = 1;
                     42:                        break;
                     43:                case '?':
                     44:                default:
                     45:                        fputs("usage: tty [-s]\n", stderr);
                     46:                        exit(1);
                     47:                }
                     48: 
                     49:        t = ttyname(0);
                     50:        if (!sflag)
                     51:                puts(t ? t : "not a tty");
                     52:        exit(t ? 0 : 1);
                     53: }

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