Block nesting of nnn instances

misc/quitcd/quitcd.bash

@@ -1,5 +1,11 @@
 n()
 {
+    # Block nesting of nnn in subshells
+    if [ $(expr $NNNLVL + 0) -ge 1 ]; then
+        echo "nnn is already running"
+        return
+    fi
+
     # The default behaviour is to cd on quit (nnn checks if NNN_TMPFILE is set)
     # To cd on quit only on ^G, export NNN_TMPFILE after the call to nnn
     export NNN_TMPFILE=${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.lastd

misc/quitcd/quitcd.csh

@@ -4,4 +4,4 @@
 # To cd on quit only on ^G, export NNN_TMPFILE after the call to nnn
 set NNN_TMPFILE=~/.config/nnn/.lastd
 
-alias n 'nnn; source "$NNN_TMPFILE"; rm "$NNN_TMPFILE"'
+alias n 'nnn; source "$NNN_TMPFILE"; rm -f "$NNN_TMPFILE"'

misc/quitcd/quitcd.fish

@@ -3,6 +3,12 @@
 # or, add the lines to the 'config.fish' file.
 
 function n --description 'support nnn quit and change directory'
+    # Block nesting of nnn in subshells
+    if [ (expr $NNNLVL + 0) -ge 1 ]
+        echo "nnn is already running"
+        return
+    end
+
     # The default behaviour is to cd on quit (nnn checks if NNN_TMPFILE is set)
     # To cd on quit only on ^G, export NNN_TMPFILE after the call to nnn
     if test -n "$XDG_CONFIG_HOME"

misc/quitcd/quitcd.zsh

@@ -1,5 +1,11 @@
 n()
 {
+    # Block nesting of nnn in subshells
+    if [ $(expr $NNNLVL + 0) -ge 1 ]; then
+        echo "nnn is already running"
+        return
+    fi
+
     # The default behaviour is to cd on quit (nnn checks if NNN_TMPFILE is set)
     # To cd on quit only on ^G, export NNN_TMPFILE after the call to nnn
     export NNN_TMPFILE=${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.lastd