add uli's hostid setting program

1 files changed, 32 insertions, 0 deletions

diff --git a/src/genhostid.c b/src/genhostid.c
new file mode 100644
index 00000000..a56cad83
--- /dev/null
+++ b/src/genhostid.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2003 Red Hat, Inc.
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *         
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/stat.h>
+int
+main (void)
+{
+  struct stat st;
+  long int n;
+  if (stat ("/etc/hostid", &st) == 0 && S_ISREG (st.st_mode)
+      && st.st_size >= sizeof (n))
+    return 0;
+  int fd = open ("/dev/random", O_RDONLY);
+  if (fd == -1 || read (fd, &n, sizeof (n)) != sizeof (n))
+    {
+      srand48 ((long int) time (NULL) ^ (long int) getpid ());
+      n = lrand48 ();
+    }
+  return sethostid (n);
+}