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authorKay Sievers <kay.sievers@suse.de>2005-06-05 04:38:10 +0200
committerKay Sievers <kay.sievers@suse.de>2005-06-05 04:38:10 +0200
commit88f4b6485e2a551de55fd9d39aeef89debf3121c (patch)
treeaf4ad7d85ea983d4e4f19d4bdfc2e0073e2a4b80 /udev.c
parent5e65ab9a191268fec7cddf6b7d8c0fefd2a6b920 (diff)
udevd: listen for netlink events
After the first valid netlink-event all event with a serial number received on the udevsend socket will be ignored. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Diffstat (limited to 'udev.c')
-rw-r--r--udev.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/udev.c b/udev.c
index ce9b42f30d..2be4c35740 100644
--- a/udev.c
+++ b/udev.c
@@ -54,8 +54,10 @@ void log_message(int priority, const char *format, ...)
}
#endif
-/* decide if we should manage the whole hotplug event
- * for now look if the kernel calls udevsend instead of /sbin/hotplug
+/* Decide if we should manage the whole uevent, including multiplexing
+ * of the hotplug directories.
+ * For now look if the kernel calls udevsend instead of /sbin/hotplug,
+ * or the uevent-helper in /proc/sys/kernel/hotplug is empty.
*/
static int manage_hotplug_event(void) {
char helper[256];
@@ -70,13 +72,15 @@ static int manage_hotplug_event(void) {
if (fd < 0)
return 0;
- len = read(fd, helper, 256);
+ len = read(fd, helper, sizeof(helper)-1);
close(fd);
if (len < 0)
return 0;
helper[len] = '\0';
+ if (helper[0] == '\0' || helper[0] == '\n')
+ return 1;
if (strstr(helper, "udevsend"))
return 1;