in reply to Spurious "Invalid Argument" on file open

What do you get from $^E?:

if(-e $rule_file) {
   if(open(my $rule_fh,'<',$rule_file)) {
     ....
   } else {
     die "Can not read file $rule_file : $! / $^E";
   }
 }

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Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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Re^2: Spurious "Invalid Argument" on file open
by rovf (Priest) on Oct 23, 2012 at 14:27 UTC
    What do you get from $^E
    I don't know (yet). I already thought to output this value too, but I can't do any changes to the application during the next couple of weeks, so this has to wait.

    I thought maybe the effect I'm experiencing might be well known already, so someone could already have a good guess what's going wrong. I now understand that this error code is far too general, to reasonably diagnose the problem....

    -- 
    Ronald Fischer <ynnor@mm.st>
[reply]
[d/l]

      The most likely reason -- especially given the network involvement -- is TOCTTOU.

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.

      RIP Neil Armstrong
[reply]
        I don't see the possibility for a race condition here. A race condition could happen, if something changes to the file between the time I check the existence, and the time I read the file. However, the file is pretty static: It is kind of a configuration file, and after it is created, it doesn't change for weeks, maybe months.

        -- 
        Ronald Fischer <ynnor@mm.st>
[reply]
[d/l]

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