Enhance sleep hook to watch for device availability

Add a sleepdevice= parameter that will watch for the specified device to
appear and then move on. This is more flexible than a defined sleep period
and prevents needless waiting if the device appears sooner.

Original patch by: Dan McGee <dan@archlinux.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/hooks/sleep b/hooks/sleep
index bade71a..50f3db3 100644
--- a/hooks/sleep
+++ b/hooks/sleep
@@ -4,6 +4,10 @@ run_hook ()
     if [ -z "${sleeptime}" ] || ! [ "${sleeptime}" -gt 0 ]; then
         sleeptime=5
     fi
-    msg "Sleeping for ${sleeptime} seconds."
-    sleep ${sleeptime}
+    if [ -n "${sleepdevice}" ]; then
+        poll_device "${sleepdevice}" ${sleeptime}
+    else
+        msg "Sleeping for ${sleeptime} seconds."
+        sleep ${sleeptime}
+    fi
 }