Use [ -t 0 ] for terminal toggle

Author: kvaps

kubectl-node_shell

@@ -2,13 +2,13 @@
 set -e
 
 kubectl=kubectl
-version=1.5.1
+version=1.5.2
 generator=""
 node=""
 nodefaultctx=0
 nodefaultns=0
 cmd='[ "nsenter", "--target", "1", "--mount", "--uts", "--ipc", "--net", "--pid", "--"'
-if ! [ -p /dev/stdin ] && ! [ -p /dev/stdout ]; then
+if [ -t 0 ]; then
   tty=true
 else
   tty=false