From 5d060fdf7b25a00b3449f5fff7e961abb9899e1b Mon Sep 17 00:00:00 2001
From: "David A. Pimentel" <davidp@lanl.gov>
Date: Thu, 4 Sep 2025 09:33:47 -0600
Subject: [PATCH] Filter duplicate ControlPath entries and skip all empty lines
 in ~/.ssh/config file.

---
 cmc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/cmc b/cmc
index 3fdc080..8da4e56 100755
--- a/cmc
+++ b/cmc
@@ -72,15 +72,16 @@ config_control_path() {
     # Extract ControlPath from SSH config
     local _result _result_count
     _result=$(awk \
-            'tolower($1) ~ /^controlpath$/ {
+            '/^ *#/ || /^ *$/{next}
+             tolower($1) ~ /^controlpath$/ {
                 if ( tolower($2) !~ /^none$/ ) {
                     print $2
                 }
-            }' ${SSH_CONFIG})
+            }' ${SSH_CONFIG} | sort -u)
     if [[ -n "${_result}" ]]
     then
         # Only a single ControlPath should be specified
-        _result_count=$(echo "${_result}" | sort -u | wc -l)
+        _result_count=$(echo "${_result}" | wc -l)
         if (( _result_count > 1 ))
         then
             error_exit "multiple ControlPaths specified: ${_result}"