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47 lines
692 B
C
47 lines
692 B
C
/* See LICENSE file for copyright and license details. */
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [name]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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long sz;
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char *host;
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sz = sysconf(_SC_HOST_NAME_MAX);
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if (sz < 0)
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sz = 255;
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host = malloc(sz + 1);
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if (!host)
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eprintf("malloc:");
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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if (argc < 1) {
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if (gethostname(host, sz + 1) < 0)
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eprintf("gethostname:");
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puts(host);
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} else {
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if (sethostname(argv[0], strlen(argv[0])) < 0)
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eprintf("sethostname:");
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}
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free(host);
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return EXIT_SUCCESS;
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}
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