globals 2.76 KB
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PROFILE_DIR="/etc/network.d"
SUBR_DIR="/usr/lib/network"
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CONN_DIR="$SUBR_DIR/connections"
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STATE_DIR="/run/network"
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STATE_FILE="${NETCTL_STATE_FILE:-/var/lib/netctl/netctl.state}"
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### Logging/Error reporting

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report_notice() {
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    echo "$*"
}

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report_error() {
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    echo "$*"
}

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report_debug() {
    is_yes "${NETCTL_DEBUG:-no}" && echo "DEBUG: $*" >&2
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}

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exit_error() {
    report_error "$@" >&2
    exit 1
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}


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### Variable management

## Check if a variable occurs in an array
# $1: the variable to find
# $2...: the array elements
in_array() {
    local hay needle=$1
    shift
    for hay; do
        [[ $hay == "$needle" ]] && return 0
    done
    return 1
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}

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## Check if a variable denotes a positive truth value
# $1: the variable to check, use is_yes ${VAR:-yes} to set a default
is_yes() {
    case ${1,,} in
      yes|true|on|1)
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        return 0
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      ;;
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      no|false|off|0)
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        return 1
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      ;;
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      *)
        report_error "Not a valid truth value: '$1'"
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        return 1
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      ;;
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    esac
}

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### Control flow

## Show what we evaluate when debugging, but always evaluate
do_debug() {
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    report_debug "${FUNCNAME[1]}:" "$@"
    "$@"
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}

## Exit if we are not effectively root
# $1: program name (optional)
ensure_root() {
    (( EUID == 0 )) || exit_error "${1-$0} needs root privileges"
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}
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## Waits until a statement succeeds or a timeout occurs
# $1: timeout in seconds
# $2...: condition command
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timeout_wait() {
    local timeout=$1
    (( timeout *= 5 ))
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    shift
    while ! eval "$*"; do
        (( timeout-- > 0 )) || return 1
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        sleep 0.2
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    done
    return 0
}


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### Profile management

## List all acceptable profiles names (assume they don't contain newlines)
list_profiles() {
    # JP: follow aliases with -L, also skip profiles that end with '.conf' (so
    #     profile.conf can be the wpa.conf file for profile)
    find -L "$PROFILE_DIR/" -maxdepth 1 -type f -not -name '.*' -not -name '*~' -not -name '*.conf' -not -name '*.service' -printf "%f\n"
}

## Sources all hooks, a profile and any interface hook
# $1: profile name
load_profile() {
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    local hook
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    if [[ ! -r "$PROFILE_DIR/$1" ]]; then
        exit_error "Profile '$1' does not exist or is not readable"
    fi
    while read -r hook; do
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        source "$hook"
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    done < <(find -L "$PROFILE_DIR/hooks" -maxdepth 1 -type f -executable -not -name '.*' -not -name '*~' | sort -u)
    source "$PROFILE_DIR/$1"
    if [[ -z $Interface ]]; then
        exit_error "Profile '$1' does not specify an interface"
    fi
    if [[ ! -r "$CONN_DIR/${Connection:-/dev/null/nonexistent}" ]]; then
        exit_error "Profile '$1' does not specify a valid connection"
    fi
    if [[ -x "$PROFILE_DIR/interfaces/$Interface" ]]; then
        source "$PROFILE_DIR/interfaces/$Interface"
    fi
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}


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# vim: ft=sh ts=4 et sw=4: