Use bash subshell for procfs interpolation of cmdline file

Author: mdeguzis

save_command_strategies/linux_procfs.sh

@@ -13,7 +13,10 @@ exit_safely_if_empty_ppid() {
 
 full_command() {
 	[[ -z "$COMMAND_PID" ]] && exit 0
-	cat /proc/${COMMAND_PID}/cmdline | xargs -0 printf "%q "
+    # See: https://unix.stackexchange.com/a/567021
+    # Avoid complications with system printf by using bash subshell interpolation.
+    # This will properly escape sequences and null in cmdline.
+    cat /proc/${COMMAND_PID}/cmdline | xargs -0 bash -c 'printf "%q " "$0" "$@"'
 }
 
 main() {