From f4acfc7a4e065bab2f4e01f1c641d0b398deb8d7 Mon Sep 17 00:00:00 2001
From: Arun Prakash Jana <engineerarun@gmail.com>
Date: Sun, 17 Nov 2019 14:33:30 +0530
Subject: [PATCH] Block nesting of nnn instances

---
 misc/quitcd/quitcd.bash | 6 ++++++
 misc/quitcd/quitcd.csh  | 2 +-
 misc/quitcd/quitcd.fish | 6 ++++++
 misc/quitcd/quitcd.zsh  | 6 ++++++
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/misc/quitcd/quitcd.bash b/misc/quitcd/quitcd.bash
index a26395db..95939a00 100644
--- a/misc/quitcd/quitcd.bash
+++ b/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
diff --git a/misc/quitcd/quitcd.csh b/misc/quitcd/quitcd.csh
index 206e620a..ef95fff3 100644
--- a/misc/quitcd/quitcd.csh
+++ b/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"'
diff --git a/misc/quitcd/quitcd.fish b/misc/quitcd/quitcd.fish
index 4117cc51..12fccedb 100644
--- a/misc/quitcd/quitcd.fish
+++ b/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"
diff --git a/misc/quitcd/quitcd.zsh b/misc/quitcd/quitcd.zsh
index 9259e4a6..20a613f9 100644
--- a/misc/quitcd/quitcd.zsh
+++ b/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