/* * Copyright (c) 1983, 1988 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint char copyright[] = "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)hostname.c 5.3 (Berkeley) 6/18/88"; #endif /* not lint */ #include <stdio.h> #include <sys/param.h> main(argc,argv) int argc; char **argv; { extern int optind; int ch, sflag; char hostname[MAXHOSTNAMELEN], *p, *index(); sflag = 0; while ((ch = getopt(argc, argv, "s")) != EOF) switch((char)ch) { case 's': sflag = 1; break; case '?': default: fputs("hostname [-s] [hostname]\n", stderr); exit(1); } argv += optind; if (*argv) { if (sethostname(*argv, strlen(*argv))) { perror("sethostname"); exit(1); } } else { if (gethostname(hostname, sizeof(hostname))) { perror("gethostname"); exit(1); } if (sflag && (p = index(hostname, '.'))) *p = '\0'; puts(hostname); } exit(0); }