fix pgrep change

diff --git a/backup b/backup
index f885c3afa480d38c0b72bc59147c8aef1c9ebcd5..3af2b3e638671da2d3d0949cc9ae4321c029ebb0 100755 (executable)
--- a/backup
+++ b/backup
@@ -7,7 +7,7 @@ if [ "$(id -u)" -ne 0 ]; then
     exit 1
 fi
 
-if pgrep backup > /dev/null; then
+if [ "$(pgrep backup)" != "$$" ]; then
     echo "Backup is still running!"
     exit 1
 fi