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Use HOST_NAME_MAX in hostname(1)

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This commit is contained in:
sin 2014-02-11 10:59:53 +00:00
parent b0e4b45e3b
commit 3bf464c1d6
1 changed files with 5 additions and 4 deletions
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9
hostname.c
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@ -1,8 +1,9 @@
/* See LICENSE file for copyright and license details. */ /* See LICENSE file for copyright and license details. */
#include <unistd.h> #include <limits.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h>
#include "util.h" #include "util.h"
static void static void
@ -14,7 +15,7 @@ usage(void)
int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
char buf[BUFSIZ]; char host[HOST_NAME_MAX + 1];
ARGBEGIN { ARGBEGIN {
default: default:
@ -22,9 +23,9 @@ main(int argc, char *argv[])
} ARGEND; } ARGEND;
if (argc < 1) { if (argc < 1) {
if (gethostname(buf, sizeof(buf)) < 0) if (gethostname(host, sizeof(host)) < 0)
eprintf("gethostname:"); eprintf("gethostname:");
puts(buf); puts(host);
} else { } else {
if (sethostname(argv[0], strlen(argv[0])) < 0) if (sethostname(argv[0], strlen(argv[0])) < 0)
eprintf("sethostname:"); eprintf("sethostname:");