disable ctrl+c to prevent breaking pipe

Author: kpedro88

README.md

@@ -139,7 +139,8 @@ or placed in a file `~/.callhostrc` (automatically detected and sourced by `call
     The symptom of this will be that subsequent host commands hang, and pressing ctrl+C will give the error message "Interrupted system call".
     It is necessary to exit and reenter the container (in order to create a new pipe) if this occurs.
     To avoid this, chain multiple commands using logical operators (`&&` or `||`), or surround all the commands in `()` (thereby running them in a subshell).
-* Stopping a command in progress with ctrl+C will also break the pipe (as described in the previous item).
+* Stopping a command in progress with ctrl+C is disabled (to avoid breaking the pipe as described in the previous item).
+* Suspending a command with ctrl+Z is not supported and may break the session.
 
 ## `bind_condor.sh`
 

call_host.sh

@@ -4,7 +4,7 @@
 # check for configuration
 CALL_HOST_CONFIG=~/.callhostrc
 if [ -f "$CALL_HOST_CONFIG" ]; then
-    # shellcheck source=/dev/null
+	# shellcheck source=/dev/null
 	source "$CALL_HOST_CONFIG"
 fi
 
@@ -89,6 +89,8 @@ export -f startpipe
 
 # sends function to host, then listens for output, and provides exit code from function
 call_host(){
+	# disable ctrl+c to prevent "Interrupted system call"
+	trap "" SIGINT
 	if [ "${FUNCNAME[0]}" = "call_host" ]; then
 		FUNCTMP=
 	else