wifi-confwrite.lua

return function(wifiConfig,wificonflua)
    assert(wifiConfig ~= nil, "wifiConfig can't be nil")
    assert(wificonflua ~= nil, "wifi output filename can't be nil")
    
    local wificonfluatmp = wificonflua..".tmp"
    file.remove(wificonfluatmp)
    file.open(wificonfluatmp, "w")
    local w = file.writeline

    w('local wifiConfig = {}')
    w('')
    w('-- wifi.STATION    -- station: join a WiFi network')
    w('-- wifi.SOFTAP     -- access point: create a WiFi network')
    w('-- wifi.STATIONAP  -- both station and access point')
    local mode2str = {[wifi.STATIONAP]="wifi.STATIONAP", [wifi.SOFTAP]="wifi.SOFTAP", [wifi.STATION]="wifi.STATION"}
    w('wifiConfig.mode = '..mode2str[wifiConfig.mode])
    local phymode2str = {[wifi.PHYMODE_N]="wifi.PHYMODE_N", [wifi.PHYMODE_G]="wifi.PHYMODE_G", [wifi.PHYMODE_B]="wifi.PHYMODE_B"}
    w('wifiConfig.phymode = '..phymode2str[wifiConfig.phymode])
    w('')
    w('wifiConfig.accessPointConfig = {}')
    w('wifiConfig.accessPointConfig.ssid = "'..wifiConfig.accessPointConfig.ssid..'" -- Name of the SSID you want to create')
    w('wifiConfig.accessPointConfig.pwd = "'..wifiConfig.accessPointConfig.pwd..'" -- WiFi password - at least 8 characters')
    local auth2str = {[wifi.WPA2_PSK]="wifi.WPA2_PSK", [wifi.OPEN]="wifi.OPEN", [wifi.WPA_PSK]="wifi.WPA_PSK", [wifi.WPA_WPA2_PSK]="wifi.WPA_WPA2_PSK"}
    w('wifiConfig.accessPointConfig.auth = '..auth2str[wifiConfig.accessPointConfig.auth]..' --OPEN/WPA_PSK/WPA2_PSK/WPA_WPA2_PSK')
    w('wifiConfig.accessPointConfig.channel = '..tostring(wifiConfig.accessPointConfig.channel)..' -- 1-14')
    w('wifiConfig.accessPointConfig.hidden = '..tostring(wifiConfig.accessPointConfig.hidden))
    w('wifiConfig.accessPointConfig.max = '..tostring(wifiConfig.accessPointConfig.max)..' -- max clients: 1-4')
    w('wifiConfig.accessPointConfig.beacon = '..tostring(wifiConfig.accessPointConfig.beacon)..' -- beacon interval 100-60000')
    w('')
    w('wifiConfig.accessPointIpConfig = {}')
    w('wifiConfig.accessPointIpConfig.ip = "'..wifiConfig.accessPointIpConfig.ip..'"')
    w('wifiConfig.accessPointIpConfig.netmask = "'..wifiConfig.accessPointIpConfig.netmask..'"')
    w('wifiConfig.accessPointIpConfig.gateway = "'..wifiConfig.accessPointIpConfig.gateway..'"')
    w('wifiConfig.accessPointIpConfig.mac = "'..wifiConfig.accessPointIpConfig.mac..'"')
    w('')
    w('wifiConfig.accessPointDHCPConfig = {}')
    w('wifiConfig.accessPointDHCPConfig.enabled = '..tostring(wifiConfig.accessPointDHCPConfig.enabled))
    w('wifiConfig.accessPointDHCPConfig.start = "'..wifiConfig.accessPointDHCPConfig.start..'"')
    w('')
    w('wifiConfig.stationPointConfig = {}')
    w('wifiConfig.stationPointConfig.ssid = "'..wifiConfig.stationPointConfig.ssid..'" -- Name of the WiFi network you want to join')
    w('wifiConfig.stationPointConfig.pwd =  "'..wifiConfig.stationPointConfig.pwd..'" -- Password for the WiFi network')
    w('wifiConfig.stationPointConfig.auto = '..tostring(wifiConfig.stationPointConfig.auto))
    w('wifiConfig.stationPointConfig.hostname = "'..wifiConfig.stationPointConfig.hostname..'"')
    w('')
    w('wifiConfig.stationPointIpConfig = {}')
    w('wifiConfig.stationPointIpConfig.ip = "'..wifiConfig.stationPointIpConfig.ip..'"')
    w('wifiConfig.stationPointIpConfig.netmask = "'..wifiConfig.stationPointIpConfig.netmask..'"')
    w('wifiConfig.stationPointIpConfig.gateway = "'..wifiConfig.stationPointIpConfig.gateway..'"')
    w('wifiConfig.stationPointIpConfig.mac = "'..wifiConfig.stationPointIpConfig.mac..'"')
    w('')
    w('return wifiConfig')
    file.close()

    mode2str=nil
    phymode2str=nil
    auth2str=nil

    --play it safe: backup the curr config
    local wificonfluabak =  wificonflua..".bak" 
    file.remove(wificonfluabak)
    file.rename(wificonflua, wificonfluabak)

    --rename the new config stored in the tmp file to the user config
    if not file.rename(wificonfluatmp, wificonflua) then
        -- failed, so restore backup, cleanup and bail out
        file.rename(wificonfluabak, wificonflua)
        file.remove(wificonfluatmp)
        print("wifi-confwrite error: unable to save to file "..wificonflua)
        collectgarbage()
        return false
    else
        --save went ok, so remove backup
        file.remove(wificonfluabak)
    end
    
    collectgarbage()
    return true
end