tests: try using truncate command before falling back to using dd

[tools/e2fsprogs.git] / tests / scripts / resize_test

diff --git a/tests/scripts/resize_test b/tests/scripts/resize_test
index 3c5e260..fc9d1c2 100755 (executable)
--- a/tests/scripts/resize_test
+++ b/tests/scripts/resize_test
@@ -1,11 +1,13 @@
 #!/bin/sh
 
-# old distros are missing "truncate", emulate it with "dd"
-truncate()
+# old distros are missing "truncate", emulate it with "dd" if necessary
+do_truncate()
 {
        [ "$1" = "-s" ] && size=$2 && shift 2
 
-       dd if=/dev/zero of=$1 bs=1 count=0 seek=$size >> $LOG 2>&1
+       if ! truncate -s $size $1 >> $LOG 2>&1 ; then
+               dd if=/dev/zero of=$1 bs=1 count=0 seek=$size >> $LOG 2>&1
+       fi
 }
 
 resize_test () {
@@ -17,14 +19,14 @@ touch $TMPFILE
 
 # Verify that the $TMP filesystem handles $SIZE_2 sparse files.
 # If that fails, try the local filesystem instead.
-if truncate -s $SIZE_2 $TMPFILE 2> /dev/null; then
+if do_truncate -s $SIZE_2 $TMPFILE 2> /dev/null; then
        echo "using $TMPFILE" >> $LOG
 else
        rm $TMPFILE
        export TMPFILE=$(mktemp ./$test_name.tmp.XXXXXX)
        touch $TMPFILE
        echo "using $TMPFILE" >> $LOG
-       if ! truncate -s $SIZE_2 $TMPFILE >> $LOG 2>&1; then
+       if ! do_truncate -s $SIZE_2 $TMPFILE >> $LOG 2>&1; then
                rm $TMPFILE
                return 111
        fi