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Annotation of 43BSDTahoe/usr.bin/tty.c, revision 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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