[Bash Script] Mount FTP servers from a list of servers.

mount-ftp.sh

#!/bin/bash
# mount ftp servers from a server list.
# i use it to mount my phone with the
# help of an ftp server android app.
# requires curlftpfs.

# config
hosts=~/.config/mftp/hosts
mntdir=~/Mount/FTP

main ()
{
    mkconfig
    nocursor
    while true; do

        fhosts="$(grep -vE '^$|^#' "$hosts")"
        clear
        echo "choose server"
        echo "q: quit"
        echo "e: edit server list"
        echo "$fhosts" | cut -d, -f1 | nl -w1 -s': '

        read -s -n 1 char
        case "$char" in
            q) exit ;;
            e) edit; continue ;;
            '') continue ;;
            *) [ "$char" -gt 0 ] || continue
        esac

        mnt="$mntdir/$char"
        line="$(echo "$fhosts" | sed "${char}q;d")"
        host="$(echo "$line" | cut -d, -f1)"
        user="$(echo "$line" | cut -sd, -f2-)"

        [ -n "$line" ] || [ -n "$host"] || continue
        [ -n "$user" ] && user=",user=$user"
        break

    done

    mnt
    ! is_mounted && return
    while true; do
        open
        unmnt
        ! is_mounted && break
    done
}

mnt ()
{
    mkdir -p "$mnt"
    is_mounted && echo already mounted. && return
    cleanup
    echo "connecting..."
    curlftpfs -o utf8"$user" "ftp://$host" "$mnt"
    is_mounted && echo mounted. || rmdir "$mnt"
    cleanup
}

unmnt ()
{
    ! is_mounted && echo not mounted. && return 1
    fusermount -u "$mnt" && echo unmounted.
    rmdir "$mnt"
}

open ()
{
    $TERMFILE "$mnt"
}

cleanup ()
{
    is_mounted || u >/dev/null 2>&1
}

is_mounted ()
{
    [ $(ls -A "$mnt" 2>/dev/null | wc -l) -gt 0 ] && return 0
    grep -q "$host" /etc/mtab && return 0
    return 1
}

nocursor ()
{
    tput civis
    trap 'tput cnorm' EXIT
}

edit ()
{
    ed="${EDITOR:-$VISUAL}"
    [ -z "$ed" ] && ed=xdg-open
    $ed "$hosts"
}

mkconfig ()
{
    [ -f "$hosts" ]  && return 1
    mkdir -p "$(dirname "$hosts")"
    echo '# list of ftp servers for mftp
# <host:port>[,user:password]
# examples:
ftp.example.com:6969,user:pass
192.168.1.15:2121' > "$hosts"
}

main "$@"
exit