1 files changed, 47 insertions, 0 deletions
diff --git a/contrib/conditional-init.c b/contrib/conditional-init.c
new file mode 100644
index 0000000..10c69cc
--- /dev/null
+++ b/contrib/conditional-init.c
@@ -0,0 +1,47 @@
+#include <unistd.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/reboot.h>
+#include "../ninitfeatures.h"
+#include "../uid.h"
+
+#define TM_OUT 1200
+
+int main(int argc, char **argv) {
+  unsigned long ul;
+  char *stable, *test;
+
+  if (argc < 4) {
+    carp("usage: conditional-init now /stable/init /test/init [args...]\n"
+	 "\tnow must be the output of: date +%s");
+    return 1;
+  }
+
+  errmsg_argv0 = "conditional-init";
+  stable=argv[2];
+  test=argv[3];
+  
+  if (scan_ulong(argv[1], &ul)==0 || ul + TM_OUT < (unsigned long)time(0)) {
+    carp("booting (stable): ", stable);
+    argv += 3;
+    argv[0] = stable;
+    execve(stable, argv, environ);
+    return 0;
+  }
+
+  if (fork()==0) {
+    unsigned long deadline = (unsigned long)time(0) + TM_OUT;
+    while ((unsigned long)time(0) < deadline ) nano_sleep(1,0);
+    sync();
+    set_reboot(RB_AUTOBOOT);
+    return 2;
+  }
+
+  argv += 3;
+  argv[0]=test;
+  carp("booting (test): ", test);
+  execve(test, argv, environ);
+  nano_sleep(TM_OUT,0); /* only if test fails */
+  set_reboot(RB_AUTOBOOT);
+  return 1;
+}