refactor(mock,_{,u}mount.linux,kldunload): work around nounset

Co-authored-by: Ville Skyttä <[email protected]>

Author: akinomyoga

completions/_mock

@@ -27,8 +27,8 @@ _comp_cmd_mock()
             return
             ;;
         -r | --root)
-            _comp_compgen_split -- "$(command ls "$cfgdir")"
-            COMPREPLY=(${COMPREPLY[@]/%.cfg/})
+            _comp_compgen_split -- "$(command ls "$cfgdir")" &&
+                COMPREPLY=(${COMPREPLY[@]/%.cfg/})
             return
             ;;
         --configdir | --resultdir)

completions/_mount.linux

@@ -24,7 +24,8 @@ _comp_cmd_mount()
                 qnx4 ramfs reiserfs romfs squashfs smbfs sysv tmpfs ubifs udf
                 ufs umsdos usbfs vfat xfs'
             _comp_compgen -a fstypes
-            [[ $split ]] && COMPREPLY=(${COMPREPLY[@]/#/$prev,})
+            [[ $split ]] && ((${#COMPREPLY[@]})) &&
+                COMPREPLY=(${COMPREPLY[@]/#/$prev,})
             return
             ;;
         --bind | -B | --rbind | -R)
@@ -202,7 +203,8 @@ _comp_cmd_mount()
             esac
             # COMP_WORDBREAKS is a real pain in the ass
             prev="${prev##*["$COMP_WORDBREAKS"]}"
-            [[ $split ]] && COMPREPLY=(${COMPREPLY[@]/#/"$prev,"})
+            [[ $split ]] && ((${COMPREPLY[@]})) &&
+                COMPREPLY=(${COMPREPLY[@]/#/"$prev,"})
             [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
             return
             ;;

completions/_umount.linux

@@ -110,7 +110,8 @@ _comp_cmd_umount()
                 reiserfs romfs squashfs smbfs sysv tmpfs ubifs udf ufs umsdos
                 usbfs vfat xfs'
             _comp_compgen -a fstypes
-            [[ $split ]] && COMPREPLY=(${COMPREPLY[@]/#/$prev,})
+            [[ $split ]] && ((${#COMPREPLY[@]})) &&
+                COMPREPLY=(${COMPREPLY[@]/#/$prev,})
             return
             ;;
         -O)

completions/kldunload

@@ -7,8 +7,8 @@ _comp_cmd_kldunload()
     local cur prev words cword comp_args
     _comp_initialize -- "$@" || return
 
-    _comp_compgen_split -X '!*.ko' -- "$(kldstat)"
-    COMPREPLY=(${COMPREPLY[@]%.ko})
+    _comp_compgen_split -X '!*.ko' -- "$(kldstat)" &&
+        COMPREPLY=(${COMPREPLY[@]%.ko})
 } &&
     complete -F _comp_cmd_kldunload kldunload