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