Fix find_binary always succeeding

find_binary inside dracut-functions always succeeds. Independent of
whether the file actually exists or not.

This patch fixes this.

And since we're using the function not only to find binaries at little
enhancement there shouldn't be that bad either.

--
dracut-functions |   21 ++++++++++++++++-----
  1 files changed, 16 insertions(+), 5 deletions(-)

dracut-functions

@@ -53,15 +53,26 @@ inst_library() {
     fi
 }
 	
-find_binary() {
+find_file() {
    local binpath="/bin /sbin /usr/bin /usr/sbin" p
-    [[ ${1##*/} = $1 ]] || { echo $1; return 0; }
+
+   #Full path or not?
+   if [[ ${1##*/} != $1 ]] ; then
+      if [[ -e $1 ]] ; then
+          echo $1;
+          return 0;
+      fi
+      return 1;
+   fi
+   #Search in path
     for p in $binpath; do
       [[ -x $p/$1 ]] && { echo "$p/$1"; return 0; }
+      [[ -e $p/$1 ]] && { echo "$p/$1"; return 0; }
     done
     return 1
 }
 
+
 # Same as above.
 # If the file is a binary executable, install all its
 # shared library dependencies, if any.
@@ -134,7 +145,7 @@ inst() {
         echo "usage: inst <file> <root> [<destination file>]"
         return 1
     fi
-    local src=$(find_binary "$1") || {
+    local src=$(find_file "$1") || {
 	echo "Cannot find requested file $1. Exiting."
 	exit 1
     }