1 files changed, 36 insertions, 0 deletions
diff --git a/src/s6-linux-utils/s6-hostname.c b/src/s6-linux-utils/s6-hostname.c
new file mode 100644
index 0000000..f2138cf
--- /dev/null
+++ b/src/s6-linux-utils/s6-hostname.c
@@ -0,0 +1,36 @@
+/* ISC license. */
+
+#include <skalibs/nonposix.h>
+
+#include <unistd.h>
+#include <string.h>
+
+#include <skalibs/allreadwrite.h>
+#include <skalibs/strerr.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "s6-hostname [ hostname ]"
+
+static int hostname_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 hostname_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) ? hostname_getit() : hostname_setit(argv[1]) ;
+}