properly check markers of single file/all files in directory

shell/check_markers.sh

@@ -1,12 +1,50 @@
 ##!/bin/bash/
 
-dir=$1
+fildir=$1
 
-#ls ${dir} | while read fn; do echo $fn; cat ${dir}$fn | grep -a "|[A-Z][A-Z]," -o | wc -l; done;
+if [ -z "${fildir}" ]; then
+  echo "CLI argument missing: provide file or directory" >&2
+  exit 1
+fi
 
-#ls ${dir} | while read fn; do echo $fn; cat ${dir}$fn | grep -a "|[A-Z][A-Z]," -o; done;
+list-markers()
+{
+  arg="$1"
+  if [ -z "${arg}" ]; then
+    echo "list-markers: missing file argument" >&2
+    exit 1
+  else
+    if [ -d "${arg}" ]; then
+      echo "list-markers: file argument is a directory" >&2
+      exit 1
+    fi
+  fi
+  
+  echo -e "\n${arg}\n"
+  mrks=$(cat ${arg} | grep -a "|[A-Z][a-zA-Z]," -o)
+  mrksnum=$(echo "${mrks}" | wc -l)
+  echo -e "(${mrksnum})\n${mrks}"
+}
 
-#ls ${dir} | while read fn; do echo $fn; cat ${dir}$fn | xxd | head -n10 | tail -n3; done;
+if [ -f "${fildir}" ]; then
+
+  echo "analyzing single file ${fildir} ..."
+  list-markers "${fildir}"
+
+elif [ -d "${fildir}" ]; then
+
+  echo "analyzing all *.raw files in directory ${fildir} ..."
+  lsfls=$(ls ${fildir}/*.raw | sed 's/\/\//\//g')
+  echo -e "\n${lsfls}"
+
+  for fl in ${lsfls}; do
+    list-markers "${fl}"
+  done
+
+else
+
+  echo "does not exist: ${fildir}" >&2
+  exit 1
+
+fi
 
-ls ${dir} | while read fn; do echo $fn; cat ${dir}$fn | grep -a "|[A-Z][a-zA-Z]," -o | wc -l; done;
-ls ${dir} | while read fn; do echo $fn; cat ${dir}$fn | grep -a "|[A-Z][a-zA-Z]," -o; done;