diff --git a/brewlog.sh b/brewlog.sh
index 49be191..fac60f5 100644
--- a/brewlog.sh
+++ b/brewlog.sh
@@ -59,29 +59,36 @@ if [ ! -f "$LOGFILE" ] ; then
 	touch "$LOGFILE"
 fi
 
-if [ $# -eq 0 ]; then
+if [ "$#" -eq 0 ]; then
     HELP
+    exit 0;
 fi
 
 if [ "$1" == "--help" ]; then
 	HELP
+	exit 0;
 elif [ "$1" == "--brew-help" ]; then
 	brew help
+	exit 0;
 elif [ "$1" == "version" ]; then
 	VERSION
+	exit 0;
 elif [ "$1" == "tail" ]; then
 	if [ "$2" == "-n" ]; then
 	   # tail with specified number of lines
 	   tail -n "$3" "$LOGFILE"
+	   exit 0;
 	else
 	   # tail with 15 lines (default -n for tail is 10, I wanted more)
 	   tail -n 15 "$LOGFILE"
+	   exit 0;
 	fi
 elif [ "$1" == "archive" ]; then
 	if [ -f "$LOGFILE" ] ; then
 		# Archiving logfile i.e. brew.log is removed (will be created on next run)
 		xz -vf $LOGFILE
 		mv "${LOGFILE}.xz" "$LOGFILE-$(date +'%Y%m%d').xz"
+		exit 0;
 	else
 		echo "$LOGFILE doesn't exist"
 		exit 1
@@ -90,4 +97,5 @@ else
    echo "brew $* :: $(date)" | tee -a "$LOGFILE"
    # logs both STDOUT and STDERR to $LOGFILE
    $(which brew) "$@" 2>&1 | tee -a "$LOGFILE"
+   exit 0;
 fi
\ No newline at end of file
diff --git a/install.sh b/install.sh
index 1ff6a92..1ad0f17 100644
--- a/install.sh
+++ b/install.sh
@@ -1,17 +1,26 @@
 #!/bin/bash
-
 if [ -w /usr/local/bin ]; then
    curl -sSL 'https://raw.githubusercontent.com/robocopAlpha/brewlog/master/brewlog.sh' > /usr/local/bin/brewlog
    chmod +x /usr/local/bin/brewlog
 else
-   sudo -s
-   if [ -w /usr/local/bin ]; then
-      curl -sSL 'https://raw.githubusercontent.com/robocopAlpha/brewlog/master/brewlog.sh' > /usr/local/bin/brewlog
-   	  chmod +x /usr/local/bin/brewlog
-      exit
-      sudo -k
-    else
-      echo "cannot write to /usr/local/bin".
-      exit 1;
-    fi
-fi
+  curl -sSL 'https://raw.githubusercontent.com/robocopAlpha/brewlog/master/brewlog.sh' >| brewlog.sh
+  echo "user $(whoami) cannot write to /usr/local/bin."
+  read -r -p "use sudo (y/N): " choice
+  shopt -q nocasematch;
+  if [ "$?" -eq "1" ]; then
+    shopt -s nocasematch
+    flag=1
+  fi
+  if [[ "$choice" =~ ^(yes|y)$ ]]
+  then
+    sudo mv brewlog.sh /usr/local/bin/brewlog
+    sudo chmod +x /usr/local/bin/brewlog
+    sudo -k
+  else
+    echo "cannot install /usr/local/bin/brewlog without sudo rights"
+    exit 1;
+  fi
+  if [ "$flag" -eq "1" ]; then
+    shopt -s nocasematch
+  fi
+fi
\ No newline at end of file