A simple way of connecting to SSH servers

sssh

#!/bin/bash
# A simple way of connecting to SSH servers
#
# Usage:
# sssh host_codename [USER]
#
# Configuration file:
# codename host [username]

CONF="$HOME/.sssh_hosts"

_sssh_connect() {
    local host address ssh_user

    host=$(cat "$CONF" | grep "^$1 ")
    if [ -n "$host" ]; then
        address=$(echo "$host" | cut -d ' ' -f 2)

        if [ $# -lt 2 ]; then
            ssh_user=$(echo "$host" | cut -d ' ' -f 3)
        else
            ssh_user="$2"
        fi

        # Use default user if none could be found
        if [ -n "$ssh_user" ]; then
            ssh $ssh_user@$address
        else
            ssh $address
        fi
    else
        echo "Host not found"
        return 1
    fi
}

_sssh_help() {
cat << EOF
`basename $0`:
    A simple way of connecting to SSH servers

    `basename $0` codename [user]
    `basename $0` -i codename host [user]
    `basename $0` -x codename
    `basename $0` -l
    `basename $0` --help

    Given a codename, connects to the server associated with it using a default
    username or the user passed as argument.

      -i  Insert a new host to the bookmark
      -x	Remove a saved host
      -l	List saved connections
      -h	Help
EOF
}

_sssh_insert() {
    if [ "$#" -gt 1 ]; then
        echo "$@" >> "$CONF"
    else
        echo "Insufficient arguments"
        return 1
    fi
}

_sssh_remove() {
    if [ "$#" -eq 1 ]; then
        local host=$(cat "$CONF" | grep "^$1 ")
        if [ -n "$host" ]; then
            local tmpfile=$(mktemp)
            cat "$CONF" > "$tmpfile"
            sed "/^${1} /d" "$tmpfile" > "$CONF"
            rm "$tmpfile"
        else
            echo "Host not found"
            return 1
        fi
    else
        echo "Wrong arguments"
        return 1
    fi
}

case "$1" in
    -i)
        shift
        _sssh_insert "$@"
        ;;
    -x)
        shift
        _sssh_remove "$@"
        ;;
    -l)
        cat "$CONF"
        ;;
    -h|--help)
        _sssh_help
        ;;
    *)
        _sssh_connect "$@"
        ;;
esac