Use sysconf() instead of HOST_NAME_MAX
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parent
7309302e25
commit
efbce07f94
17
hostname.c
17
hostname.c
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@ -15,7 +15,16 @@ usage(void)
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int
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int
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main(int argc, char *argv[])
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main(int argc, char *argv[])
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{
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{
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char host[HOST_NAME_MAX + 1];
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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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ARGBEGIN {
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default:
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default:
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@ -23,13 +32,15 @@ main(int argc, char *argv[])
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} ARGEND;
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} ARGEND;
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if (argc < 1) {
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if (argc < 1) {
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if (gethostname(host, sizeof(host)) < 0)
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if (gethostname(host, sz + 1) < 0)
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eprintf("gethostname:");
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eprintf("gethostname:");
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puts(host);
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puts(host);
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} else {
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} else {
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if (sethostname(argv[0], strlen(argv[0])) < 0)
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if (sethostname(argv[0], sz + 1) < 0)
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eprintf("sethostname:");
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eprintf("sethostname:");
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}
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}
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free(host);
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return EXIT_SUCCESS;
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return EXIT_SUCCESS;
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}
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}
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