Rudimentary password manager

passman.sh

#!/bin/sh
FILE=~/Dropbox/creds.txt
DISPPASS="$1"
read -s -p "Please enter master passphrase: " PASSPHRASE
printf "\n"

# decrypt to /tmp
[ -f /tmp/creds.txt ] && rm /tmp/creds.txt
echo "$PASSPHRASE" | gpg --batch -q -o /tmp/creds.txt --passphrase-fd 0 --cipher-algo AES256 --decrypt "$FILE" &> /dev/null

if [ $? -ne 0 ]; then
	echo "Decryption error"
	exit 1
fi

# xsel or pbcopy present??
XSEL_PRESENT=`which xsel`
PBCOPY_PRESENT=`which pbcopy`

if [ -z "$XSEL_PRESENT" ] && [ -z "$PBCOPY_PRESENT" ]; then
	DISPPASS="yes"
fi

if [ -n "$XSEL_PRESENT" ]; then
	COPY_CMD="xsel -b"
elif [ -n "$PBCOPY_PRESENT" ]; then
	COPY_CMD="pbcopy"
fi
# present menu
clear
FILEDATA=`cat /tmp/creds.txt | nl`

#remove the tmpfile
rm /tmp/creds.txt
ACCTS=`echo "$FILEDATA" | awk -F ':::' '{print$1}'`
echo "$ACCTS"

while [ "$SELECTION" != "q" ]; do
	printf "\nWhat would you like? (a to add, q to exit):  "
	read SELECTION
	
	if [ "$SELECTION" == "a" ]; then
		read -p "Name: " ACCT
		ACCT_EXISTS=`echo "$ACCTS" | grep -i "$ACCT"`
		if [ -z "$ACCT_EXISTS" ]; then
			read -s -p "Password: " PASS
			#decrypt file for adding
			echo "$PASSPHRASE" | gpg --batch -q -o /tmp/creds.txt --passphrase-fd 0 --cipher-algo AES256 --decrypt "$FILE"
			printf "\n$ACCT:::$PASS" >> /tmp/creds.txt
			# encrypt it back
			gpg -o "$FILE" --cipher-algo AES256 --symmetric -c /tmp/creds.txt
			rm /tmp/creds.txt
		else
			clear
			echo "Account exists!"
		fi

		continue
	elif [ "$SELECTION" == "q" ]; then
		break
	else 
		DATA=`echo "$FILEDATA" | grep -wi $SELECTION | sed 's/:::/:   /'`
		PASS=`echo "$DATA" | awk -F ': *' '{print$2}'`

		if [ "$DISPPASS" == "-d" ]; then
			echo "$PASS"
		else 
			echo "$PASS" | $COPY_CMD
			echo "Password in clipboard"
		fi
	fi
done

echo "Goodbye"