From: John Crispin <blogic@openwrt.org>
Date: Fri, 8 Mar 2013 22:46:22 +0000 (+0100)
Subject: add coldplug handler
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fprocd.git;a=commitdiff_plain;h=a8152cb5f25726bfbbd063d8c2dcddd0c7b36a0d

add coldplug handler
---

diff --git a/coldplug.c b/coldplug.c
new file mode 100644
index 0000000..d5997f8
--- /dev/null
+++ b/coldplug.c
@@ -0,0 +1,66 @@
+/*
+ * 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"
+
+static struct uloop_process udevtrigger;
+
+static void coldplug_complete(struct uloop_timeout *t)
+{
+	DEBUG(2, "Coldplug complete\n");
+	hotplug_last_event(NULL);
+	procd_state_next();
+}
+
+static void udevtrigger_complete(struct uloop_process *proc, int ret)
+{
+	DEBUG(2, "Finished udevtrigger\n");
+}
+
+void procd_coldplug(void)
+{
+	char *argv[] = { "udevtrigger", NULL };
+
+	umount2("/dev/pts", MNT_DETACH);
+	umount2("/dev/", MNT_DETACH);
+	mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755,size=512K");
+	mkdir("/dev/shm", 0755);
+	mkdir("/dev/pts", 0755);
+	mount("devpts", "/dev/pts", "devpts", 0, 0);
+	udevtrigger.cb = udevtrigger_complete;
+	udevtrigger.pid = fork();
+	if (!udevtrigger.pid) {
+		execvp(argv[0], argv);
+		ERROR("Failed to start coldplug\n");
+		exit(-1);
+	}
+
+	if (udevtrigger.pid <= 0) {
+		ERROR("Failed to start new coldplug instance\n");
+		return;
+	}
+
+	hotplug_last_event(coldplug_complete);
+	uloop_process_add(&udevtrigger);
+
+	DEBUG(2, "Launched coldplug instance, pid=%d\n", (int) udevtrigger.pid);
+}