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/* ISC license. */
#ifndef _BSD_SOURCE
#define _BSD_SOURCE
#endif
#include <unistd.h>
#include <string.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/strerr2.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-hostname [ hostname ]"
static int getit (void)
{
stralloc sa = STRALLOC_ZERO ;
if (sagethostname(&sa) < 0) strerr_diefu1sys(111, "get hostname") ;
sa.s[sa.len++] = '\n' ;
if (allwrite(1, sa.s, sa.len) < sa.len)
strerr_diefu1sys(111, "write to stdout") ;
return 0 ;
}
static int setit (char const *h)
{
if (sethostname(h, strlen(h)) < 0)
strerr_diefu1sys(111, "set hostname") ;
return 0 ;
}
int main (int argc, char const *const *argv)
{
PROG = "s6-hostname" ;
return (argc < 2) ? getit() : setit(argv[1]) ;
}
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