So, basically it returns "The channel is not live" or "x hours x minutes"?
Code:
on *:sockread:uptime:{ 
  var %uptime 
  sockread %uptime
  tokenize 32 %uptime
  if (($1 isnum) && ($2)) || ($1- == The channel is not live) writeini uptime.ini uptime #channelorsomething %uptime
}

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