check-sof-logger: fix some quoting and rephrase some errors

Get the number of shellcheck warnings down a bit.

Signed-off-by: Marc Herbert <[email protected]>

Author: marc-hb

test-case/check-sof-logger.sh

@@ -65,23 +65,24 @@ func_logger_exit()
 }
 
 # check if we get any sof-logger errors
-logger_err=`grep -i "error" $error_file`
+logger_err=$(grep -i 'error' "$error_file")
 if [[ $logger_err ]]; then
     dloge "No available log to export due to sof-logger errors."
     func_logger_exit 1 'error'
 fi
 
 # '\.c\:[1-9]' to filter like '.c:6' this type keyword like:
 # [3017136.770833]  (11.302083) c0 SA  src/lib/agent.c:65  ERROR validate(), ll drift detected, delta = 25549
-fw_log_err=`grep -i "error" $data_file | grep -v '\.c\:[1-9]'`
+fw_log_err=$(grep -i 'error' "$data_file" | grep -v '\.c\:[1-9]')
+
 # '[[:blank:]]TIMESTAMP.*CONTENT$' to filter the log header:
 # TIMESTAMP  DELTA C# COMPONENT  LOCATION  CONTENT
-if [[ ! $(sed -n '/[[:blank:]]TIMESTAMP.*CONTENT$/p' $data_file) ]]; then
-    dloge "No available log to export."
+if [[ ! $(sed -n '/[[:blank:]]TIMESTAMP.*CONTENT$/p' "${data_file}") ]]; then
+    dloge "Log header not found in ${data_file}"
     func_logger_exit 1
 # we catch error from fw log
 elif [[ $fw_log_err ]]; then
-    dloge "Errors in firmware log:"
+    dloge "Error(s) found in firmware log ${data_file}"
     func_logger_exit 1
 fi