From: Edd Barrett <vext01@...>
Date: 2008-03-06T09:37:36+09:00
Subject: Re: Too many open files on OpenBSD

Edd Barrett wrote:
> ---8<---
> ./tlpsrcnode.rb:19:in `initialize': Too many open files -
> /home/tl/tl/Master/tlpkg/tlpsrc/wordcount.tlpsrc (Errno::EMFILE)
>         from ./tlpsrcnode.rb:19:in `new'
>         from ./tlpsrcnode.rb:19:in `parse'
>         from ./tlpsrcnode.rb:30:in `parse'
>         from ./tlpsrcnode.rb:20:in `each'
>         from ./tlpsrcnode.rb:20:in `parse'
>         from ./tlpsrcnode.rb:30:in `parse'
>         from ./tlpsrcnode.rb:20:in `each'
>         from ./tlpsrcnode.rb:20:in `parse'
>          ... 3055 levels...
>         from ./tlpsrcnode.rb:20:in `each'
>         from ./tlpsrcnode.rb:20:in `parse'
>         from ./roottlpsrcnode.rb:53:in `startParse'
>         from ./rbmfsplit:54
> ---8<---
> 
> This appears to happen after 297 files are concurrently opened.

Sorry this statement is inaccurate.

297 files have previously been opened and after each one has been parsed 
is immediately closed.

The call stack should be an indication of concurrently opened files? In 
this case 5 files. (Its recursive).

i suppose the src of the parse function helps (probably disobeying all 
coding conventions, sorry):
---8<---
  def parse()
    fileHandle = File.new @path
    for line in fileHandle do

      line =~ /^(.*?) (.*)/
      cmd = $~[1]
      arg = $~[2]

      if cmd =~ /^#.*/ then
        nil # comment
      elsif cmd == "depend" then
        newNode = TlpSrcNode.new @basePath + arg + ".tlpsrc", @rootNode
        newNode.parse # and so recursion starts
        @rootNode.incrementDeps
      elsif cmd == "runpattern" then
        @rootNode.addRunFile arg
      elsif cmd == "docpattern" then
        @rootNode.addDocFile arg
      elsif cmd == "srcpattern" then
        @rootNode.addSrcFile arg
      elsif @nothingCmds.detect { |i| i == cmd } then
        nil # OK
      elsif @todoCmds.detect { |i| i == cmd } then
        nil # XXX work out what these are
      else
        puts "*error: unknown cmd: '#{cmd}' arg='#{arg}'"
        exit 1
      end
    end

    fileHandle.close
  end
---8<---
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