From 1431ba6fbec9095160677d932d6ce7b76d92ded6 Mon Sep 17 00:00:00 2001
From: "Michael T. DeGuzis" <mdeguzis@users.noreply.github.com>
Date: Tue, 16 Aug 2022 08:57:39 -0400
Subject: [PATCH] Use bash subshell for procfs interpolation of cmdline file

---
 save_command_strategies/linux_procfs.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/save_command_strategies/linux_procfs.sh b/save_command_strategies/linux_procfs.sh
index ff8231f..6b64f7e 100755
--- a/save_command_strategies/linux_procfs.sh
+++ b/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() {