diff --git a/.shell.d/funs_rc b/.shell.d/funs_rc
index 6a2dcc9b..13b13a2a 100644
--- a/.shell.d/funs_rc
+++ b/.shell.d/funs_rc
@@ -191,7 +191,7 @@ bindatasearch()
         return
     fi
 
-    if [ $(du -b Cover.jpg | awk '{print $1}') -gt 1048576 ]; then
+    if [ $(wc -c Cover.jpg | cut -f1 -d' ') -gt 1048576 ]; then
         echo "[$1] file size must not exceed 1MB."
         return
     fi
diff --git a/.zshrc b/.zshrc
index 808db76f..43282d4d 100644
--- a/.zshrc
+++ b/.zshrc
@@ -2,7 +2,8 @@
 ## Shell Config -- Master File
 ################################################################################
 
-readonly SHELL_CURRENT="$(ps -o command="" $$)"
+## Note that 'ps -o command= $$' gives the same result with parameters.
+readonly SHELL_CURRENT="$(ps -o comm= $$)"
 readonly SHELL_DIR="$HOME/.shell.d"
 
 ## .profile is sourced automatically by most login managers, but we need to