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Annotation of 43BSDReno/bin/hostname/hostname.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983, 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) 1983, 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[] = "@(#)hostname.c 5.4 (Berkeley) 5/31/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: #include <stdio.h>
        !            31: #include <sys/param.h>
        !            32: 
        !            33: main(argc,argv)
        !            34:        int argc;
        !            35:        char **argv;
        !            36: {
        !            37:        extern int optind;
        !            38:        int ch, sflag;
        !            39:        char hostname[MAXHOSTNAMELEN], *p, *index();
        !            40: 
        !            41:        sflag = 0;
        !            42:        while ((ch = getopt(argc, argv, "s")) != EOF)
        !            43:                switch((char)ch) {
        !            44:                case 's':
        !            45:                        sflag = 1;
        !            46:                        break;
        !            47:                case '?':
        !            48:                default:
        !            49:                        fputs("hostname [-s] [hostname]\n", stderr);
        !            50:                        exit(1);
        !            51:                }
        !            52:        argv += optind;
        !            53: 
        !            54:        if (*argv) {
        !            55:                if (sethostname(*argv, strlen(*argv))) {
        !            56:                        perror("sethostname");
        !            57:                        exit(1);
        !            58:                }
        !            59:        } else {
        !            60:                if (gethostname(hostname, sizeof(hostname))) {
        !            61:                        perror("gethostname");
        !            62:                        exit(1);
        !            63:                }
        !            64:                if (sflag && (p = index(hostname, '.')))
        !            65:                        *p = '\0';
        !            66:                puts(hostname);
        !            67:        }
        !            68:        exit(0);
        !            69: }

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