sbase/hostname.c
Laslo Hunhold e92a1aef54 Handle { NULL } argv[] properly in manual arg-reduction
Thanks izabera for reporting this!
2017-08-05 23:50:39 +02:00

34 lines
590 B
C

/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [name]\n", argv0);
}
int
main(int argc, char *argv[])
{
char host[HOST_NAME_MAX + 1];
argv0 = *argv, argv0 ? (argc--, argv++) : (void *)0;
if (!argc) {
if (gethostname(host, sizeof(host)) < 0)
eprintf("gethostname:");
puts(host);
} else if (argc == 1) {
if (sethostname(argv[0], strlen(argv[0])) < 0)
eprintf("sethostname:");
} else {
usage();
}
return fshut(stdout, "<stdout>");
}