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authorJohn Crispin <blogic@openwrt.org>2013-03-08 23:46:05 +0100
committerJohn Crispin <blogic@openwrt.org>2013-03-13 18:58:13 +0100
commit5f271d6d1b0c36f17f90f18a73162d63328caa46 (patch)
treec1a4c44635bcaff0a79aec85b5a7eaec108fd1f6
parent9bd712e309421f75363f4a356f4c1ab2c93f8f87 (diff)
downloadunitd-5f271d6d1b0c36f17f90f18a73162d63328caa46.tar
unitd-5f271d6d1b0c36f17f90f18a73162d63328caa46.zip
add preinit handler
-rw-r--r--preinit.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/preinit.c b/preinit.c
new file mode 100644
index 0000000..f322be1
--- /dev/null
+++ b/preinit.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+
+#include <unistd.h>
+#include <unistd.h>
+
+#include "procd.h"
+#include "hotplug.h"
+#include "watchdog.h"
+
+static struct uloop_process preinit;
+
+static void spawn_procd(struct uloop_process *proc, int ret)
+{
+ char *wdt_fd = watchdog_fd();
+ char *argv[] = { "/sbin/procd", NULL };
+
+ unsetenv("INITRAMFS");
+ unsetenv("PREINIT");
+ DEBUG(1, "Exec to real procd now\n");
+ if (wdt_fd)
+ setenv("WDTFD", wdt_fd, 1);
+ execvp(argv[0], argv);
+}
+
+void procd_preinit(void)
+{
+ char *argv[] = { "/bin/sh", "/etc/preinit", NULL };
+
+ LOG("- preinit -\n");
+
+ setenv("PREINIT", "1", 1);
+ preinit.cb = spawn_procd;
+ preinit.pid = fork();
+ if (!preinit.pid) {
+ execvp(argv[0], argv);
+ ERROR("Failed to start preinit\n");
+ exit(-1);
+ }
+
+ if (preinit.pid <= 0) {
+ ERROR("Failed to start new preinit instance\n");
+ return;
+ }
+
+ uloop_process_add(&preinit);
+ DEBUG(2, "Launched preinit instance, pid=%d\n", (int) preinit.pid);
+}