diff --git a/src/vfs/extfs/helpers/iso9660.in b/src/vfs/extfs/helpers/iso9660.in
index c78c829a1..296ac54a0 100644
--- a/src/vfs/extfs/helpers/iso9660.in
+++ b/src/vfs/extfs/helpers/iso9660.in
@@ -78,7 +78,7 @@ BEGIN {
 }
 
 mcisofs_copyout () {
-        if [ "x$SEMICOLON" == "xYES" ]; then
+        if [ "x$SEMICOLON" = "xYES" ]; then
             $ISOINFO -i "$1" -x "/$2;1" 2>/dev/null > "$3"
         else
             $ISOINFO -i "$1" -x "/$2" 2>/dev/null > "$3"
diff --git a/src/vfs/extfs/helpers/uace.in b/src/vfs/extfs/helpers/uace.in
index 062d82f93..6b00f7a41 100644
--- a/src/vfs/extfs/helpers/uace.in
+++ b/src/vfs/extfs/helpers/uace.in
@@ -22,7 +22,13 @@ ACE_GET="unace x"
 # ls:
 mc_ace_fs_list()
 {
-    $ACE_LIST "$1" | gawk -v uid=${UID-0} '
+    if [ "x$UID" = "x" ]; then
+        UID=`id -ru 2>/dev/null`
+        if [ "x$UID" = "x" ]; then
+            UID=0
+        fi
+    fi
+    $ACE_LIST "$1" | gawk -v uid=$UID '
 BEGIN { Month="JanFebMarAprMayJunJulAugSepOctNovDec" }
 /%/ { 
   split($1,date,".")
diff --git a/src/vfs/extfs/helpers/uarc.in b/src/vfs/extfs/helpers/uarc.in
index 3f71277b7..e3269cb09 100644
--- a/src/vfs/extfs/helpers/uarc.in
+++ b/src/vfs/extfs/helpers/uarc.in
@@ -19,7 +19,13 @@ ARC_DEL="arc d"
 
 mc_arc_fs_list()
 {
-    $ARC_LIST "$1" | gawk -v uid=${UID-0} '
+    if [ "x$UID" = "x" ]; then
+        UID=`id -ru 2>/dev/null`
+        if [ "x$UID" = "x" ]; then
+            UID=0
+        fi
+    fi
+    $ARC_LIST "$1" | gawk -v uid=$UID '
 BEGIN { }
 /^Name/ { next }
 /===/ { next }
diff --git a/src/vfs/extfs/helpers/uc1541.in b/src/vfs/extfs/helpers/uc1541.in
index fed3301f9..a9620a167 100644
--- a/src/vfs/extfs/helpers/uc1541.in
+++ b/src/vfs/extfs/helpers/uc1541.in
@@ -20,7 +20,13 @@ C1541="c1541"
 # There are no time stamps in the disk image, so a bogus timestamp is displayed
 mc_c1541_fs_list()
 {
-    $C1541 "$1" -list | gawk -v uid=${UID-0} '
+    if [ x"$UID" = x ]; then
+        UID=`id -ru 2>/dev/null`
+        if [ "x$UID" = "x" ]; then
+            UID=0
+        fi
+    fi
+    $C1541 "$1" -list | gawk -v uid=$UID '
 BEGIN { FS = "\"" }
 /No LINES!/ { next }
 /BLOCKS FREE/ { next }