tools: Fix mkinstalldirs.

We cannot trust 'mkdir -p' to set the proper permissions on parent
directories. So create them manually.
Fix handling of paths containing spaces.
Properly prefix the path with './' if it starts with a '-'.
Stop trying to create a path after the first error.

tools/mkinstalldirs

@@ -46,47 +46,45 @@ case $dirmode in
     exec mkdir -p -- "$@"
   fi ;;
 *)
-  if mkdir -m "$dirmode" -p -- . 2>/dev/null; then
+  # We cannot trust mkdir to set the proper permissions on
-    echo "mkdir -m $dirmode -p -- $*"
+  # parent directories. So create them manually.
-    exec mkdir -m "$dirmode" -p -- "$@"
+  ;;
-  fi ;;
 esac
 
 for file
 do
-   set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+   case "$file" in
-   shift
+     /* ) pathcomp="/" ;;
-
+     -* ) pathcomp="./" ;;
-   pathcomp=
+      * ) pathcomp="" ;;
-   for d
-   do
-     pathcomp="$pathcomp$d"
-     case "$pathcomp" in
-       -* ) pathcomp=./$pathcomp ;;
    esac
 
+   saved_IFS="$IFS"
+   IFS="/"
+   for d in $file
+   do
+      IFS="$saved_IFS"
+      if test -n "$d"; then
+         pathcomp="$pathcomp$d"
          if test ! -d "$pathcomp"; then
             echo "mkdir $pathcomp"
-
             mkdir "$pathcomp" || lasterr=$?
 
             if test ! -d "$pathcomp"; then
                errstatus=$lasterr
-	else
+               break
-	  if test ! -z "$dirmode"; then
+            elif test -n "$dirmode"; then
                echo "chmod $dirmode $pathcomp"
-
                lasterr=""
                chmod "$dirmode" "$pathcomp" || lasterr=$?
-
+               if test -n "$lasterr"; then
-	     if test ! -z "$lasterr"; then
                   errstatus=$lasterr
+                  break
                fi
             fi
          fi
-     fi
-
          pathcomp="$pathcomp/"
+      fi
    done
 done