[PATCH] dracut-lib.sh: add find_mount()

[Will Woods]

Add a function to find the mount point for a given device.
---
 modules.d/99base/dracut-lib.sh |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/modules.d/99base/dracut-lib.sh b/modules.d/99base/dracut-lib.sh
index 8a54a7a..b6168df 100755
--- a/modules.d/99base/dracut-lib.sh
+++ b/modules.d/99base/dracut-lib.sh
@@ -402,6 +402,7 @@ udevproperty() {
     fi
 }
 
+# check if a given directory is a mounted filesystem
 ismounted() {
     while read a m a; do
         [ "$m" = "$1" ] && return 0
@@ -409,6 +410,16 @@ ismounted() {
     return 1
 }
 
+# find mountpoint for the given device
+find_mount() {
+    local wanted_dev="$1"; [ -b "$1" ] && wanted_dev=$(readlink -e -q "$1")
+    local dev mnt etc
+    while read -r dev mnt etc; do
+        [ "$dev" = "$wanted_dev" ] && echo $mnt && return 0
+    done < /proc/mounts
+    return 1
+}
+
 wait_for_if_up() {
     local cnt=0
     local li
-- 
1.7.10.1

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