OpenWrt – Rev 3

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#!/bin/sh /etc/rc.common
# Copyright (C) 2013 OpenWrt.org

# start after and stop before networking
START=12
STOP=89
PIDCOUNT=0

USE_PROCD=1
PROG=/sbin/logread

validate_log_section()
{
        uci_validate_section system system "${1}" \
                'log_file:string' \
                'log_size:uinteger' \
                'log_hostname:string' \
                'log_ip:ipaddr' \
                'log_remote:bool:1' \
                'log_port:port:514' \
                'log_proto:or("tcp", "udp"):udp' \
                'log_trailer_null:bool:0' \
                'log_prefix:string'
}

validate_log_daemon()
{
        uci_validate_section system system "${1}" \
                'log_size:uinteger:0' \
                'log_buffer_size:uinteger:0'
}

start_service_daemon()
{
        local log_buffer_size log_size
        validate_log_daemon "${1}"
        [ $log_buffer_size -eq 0 -a $log_size -gt 0 ] && log_buffer_size=$log_size
        [ $log_buffer_size -eq 0 ] && log_buffer_size=64
        procd_open_instance
        procd_set_param command "/sbin/logd"
        procd_append_param command -S "${log_buffer_size}"
        procd_set_param respawn 5 1 -1
        procd_close_instance
}

start_service_file()
{
        PIDCOUNT="$(( ${PIDCOUNT} + 1))"
        local pid_file="/var/run/logread.${PIDCOUNT}.pid"
        local log_file log_size

        validate_log_section "${1}" || {
                echo "validation failed"
                return 1
        }
        [ -z "${log_file}" ] && return

        mkdir -p "$(dirname "${log_file}")"

        procd_open_instance
        procd_set_param command "$PROG" -f -F "$log_file" -p "$pid_file"
        [ -n "${log_size}" ] && procd_append_param command -S "$log_size"
        procd_close_instance
}

start_service_remote()
{
        PIDCOUNT="$(( ${PIDCOUNT} + 1))"
        local pid_file="/var/run/logread.${PIDCOUNT}.pid"
        local log_ip log_port log_proto log_prefix log_remote log_trailer_null log_hostname

        validate_log_section "${1}" || {
                echo "validation failed"
                return 1
        }
        [ "${log_remote}" -ne 0 ] || return
        [ -z "${log_ip}" ] && return
        [ -z "${log_hostname}" ] && log_hostname=$(cat /proc/sys/kernel/hostname)

        procd_open_instance
        procd_set_param command "$PROG" -f -h "$log_hostname" -r "$log_ip" "${log_port}" -p "$pid_file"
        case "${log_proto}" in
                "udp") procd_append_param command -u;;
                "tcp") [ "${log_trailer_null}" -eq 1 ] && procd_append_param command -0;;
        esac
        [ -z "${log_prefix}" ] || procd_append_param command -P "${log_prefix}"
        procd_close_instance
}

service_triggers()
{
        procd_add_reload_trigger "system"
        procd_add_validation validate_log_section
}

start_service()
{
        config_load system
        config_foreach start_service_daemon system
        config_foreach start_service_file system
        config_foreach start_service_remote system
}