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Annotation of 43BSDReno/bin/hostname/hostname.c, revision 1.1.1.1

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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