lca2011: dump, re-exec with --restore on restart.

[ccan-lca-2011.git] / ccan / oserver / _info

diff --git a/ccan/oserver/_info b/ccan/oserver/_info
index 7d05837c06f3fc3f45a9d6c5967e22e605446778..7bfaa3b129e6cbd101b9c9804d22ec903709fcd1 100644 (file)
--- a/ccan/oserver/_info
+++ b/ccan/oserver/_info
@@ -16,21 +16,36 @@
  *     #include <err.h>
  *     #include <stdlib.h>
  *
+ *     #define STATE_FILE "/var/run/oserver/dump"
+ *
  *     int main(int argc, char *argv[])
  *     {
  *             struct tevent_context *ev = tevent_context_init(NULL);
  *             unsigned int port = OSERVER_PORT;
+ *             bool restore = false;
+ *             char **restore_argv;
+ *
+ *             // Save args before opt_parse mangles them.
+ *             restore_argv = talloc_array(NULL, char *, argc+2);
+ *             restore_argv[0] = argv[0];
+ *             restore_argv[1] = "--restore";
+ *             memcpy(restore_argv+2, argv+1, sizeof(argv[0])*argc);
  *
  *             opt_register_noarg("--help|--usage|-h", opt_usage_and_exit,
  *                                "\nA oserver program", "Usage information");
  *             opt_register_arg("--port", opt_set_uintval, opt_show_uintval,
  *                              &port, "Server port number");
+ *             opt_register_noarg("--restore", opt_set_bool,
+ *                                &restore, opt_hidden);
  *
  *             opt_parse(&argc, argv, opt_log_stderr_exit);
  *             if (argc != 1)
  *                     opt_log_stderr_exit("Unknown extra arguments");
  *
- *             if (!oserver_setup(ev, port, "/var/run/oserver/dump"))
+ *             if (restore) {
+ *                     if (!oserver_restore(ev, STATE_FILE))
+ *                             err(1, "Restoring server");
+ *             } else if (!oserver_setup(ev, port, STATE_FILE, restore_argv))
  *                     err(1, "Failed to set up server");
  *
  *             while (tevent_loop_wait(ev) == 0);