entrypoint.sh

#!/bin/bash

check_config_permissions () {
    # Check permissions
    find /.airdcpp -print0 |
    while IFS= read -r -d '' item
    do
        if [[ ! (-r "$item" && -w "$item") ]]
        then
            echo "Can't read/write configuration."
            echo "Make sure that UID $(id -u) can read/write the"
            echo "configuraton directory and all files therin."
            exit 1
        fi
    done
}

init_config () {
    # If configuration doesn't exist, create defaults
    [[ -r /.airdcpp/DCPlusPlus.xml ]] || cp /.default-config/DCPlusPlus.xml /.airdcpp/
    [[ -r /.airdcpp/web-server.json ]] || cp /.default-config/web-server.json /.airdcpp/
    [[ -r /.airdcpp/web-users.json ]] || cp /.default-config/web-users.json /.airdcpp/
}

validate_id () {
    # Check PUID/PGID values
    if [[ -z "${PUID}" || -z "${PGID}" ]]
    then
        echo "PUID and PGID variables must be set when container is run as root."
        exit 1
    fi
    if [[ "${PUID}" -lt 101 || "${PGID}" -lt 101 ]]
    then
        echo "PUID must be >= 101 and PGID must be >= 101 due to existing IDs in the image."
        echo "If you need to use a lower ID, start container with --user <uid>:<gid> instead."
        exit 1
    fi
}

create_user_and_group () {
    # Create airdcpp user and group if needed
    if [[ "$(id -u airdcpp &>/dev/null)" != "${PUID}" || "$(id -g airdcpp)" != "${PGID}" ]]
    then
        groupdel airdcpp &>/dev/null
        userdel airdcpp &>/dev/null
        groupadd -f -g ${PGID} airdcpp || exit 1
        useradd -u ${PUID} -g ${PGID} --no-create-home -s /usr/sbin/nologin airdcpp || exit 1
    fi
}

take_ownership () {
    # Set ownership of config files and make all files writable
    chown -R ${PUID}:${PGID} /.airdcpp
    chmod -R u+rw /.airdcpp
}

if [[ ! -z "$LOG_STARTUP" ]]
then
    set -x
fi

if [[ ! -z "$UMASK" ]]
then
    if [[ ! "$UMASK" =~ ^0?[0-7]{1,3}$ ]]
    then
        echo "The umask value $UMASK is not valid. It must be an octal number such as 0022 (or 22 without leading 0)"
        exit 1
    fi
    umask $UMASK
fi

if [[ "$container" == "podman" ]] || [[ "$(id -u)" -ne 0 ]]
then
    # Container is run as a normal user or with podman
    check_config_permissions
    init_config

    # Start airdcppd
    exec /airdcpp-webclient/airdcppd "$@"
else
    # Container is run as root
    validate_id
    create_user_and_group
    take_ownership
    init_config

    # Start airdcppd
    exec runuser -u airdcpp -g airdcpp -- /airdcpp-webclient/airdcppd "$@"
fi