check_curl: fix "echo: write error: Broken pipe"

check_curl.sh

@@ -16,7 +16,7 @@ usage() {
   -t Timeout in seconds
   -s Ignore the response status code.
   -e Specify the exact response code that should be returned. Cannot be used with -s option.
-  -S Sanitize HTML when printing to console. Good for Icinga2 Web.
+  -S Sanitize HTML when printing to console. Good for Icinga2 Web. (not functional)
   -n Don't return any perfdata if the status code was not 200.
   -a Specify the username and password for authentication in the format username:password"
   exit 3
@@ -443,10 +443,10 @@ fi
 BODY_CONTAINS=""
 if [ -n "$CRIT_STRING" ]; then
   BODY=$(curl -s $FOLLOW_REDIRECTS $INSECURE $HEADERS $RESOLVE $TIMEOUT $AUTHENTICATION "$URL")
-    if ! echo "$BODY" | grep -Fq "$CRIT_STRING"; then
-      if $SANITIZE_HTML; then
-        BODY=$(echo "$BODY" | sed 's/</\&lt;/g' | sed 's/>/\&gt;/g')
-      fi
+    if ! grep -Fq "$CRIT_STRING" <<< "$BODY"; then
+      # if $SANITIZE_HTML; then
+      #   BODY=$(echo "$BODY" | sed 's/</\&lt;/g' | sed 's/>/\&gt;/g')
+      # fi
       CRIT_STRING_MSG="response body does not contain the required string"
       ERROR_MSG="${ERROR_MSG}${CRIT_STRING_MSG}; "
       EXIT_CODE=2