From: Chris <chris.dagnon@...>
Date: 2006-02-08T02:15:53+09:00
Subject: Help: File.file?, ftype fails oddly

Hello all,

I've been working on a class+script to crawl through my directories and
thought I had it working just right, when it crashed some 13 minutes into
running.  I included the stack at the bottom, in case it gives a better
hint to anyone here.

The code where it fails is this method - the if checks fail to see that
filename is a file, and even errors out on the else's File.ftype(filename)
call:

def get_dir_info_recursive change_into_dir, write_to_file, put_in_container
Dir.chdir( change_into_dir )
Dir.foreach(".") {|filename|
  if File.directory?(filename) then
    # write_to_file.puts stuff
    # .. recursively call this method
  elsif File.file?(filename) then
    # write_to_file.puts stuff
    # .. simple gather info and add to collection
  else
    puts "ERROR: TYPE=#{File.ftype(filename)} for #{filename} in
#{put_in_container.path}"
  end
}
Dir.chdir('..')
end


My problem solving skills came up with a few alternatives:

1. Maybe the filename/directory path is too long.  After all the path +
filename end up being right about 255 characters long.
    NOPE: Tried starting the loop right in the directory where the file
errors out, even at earlier directories, the error doesn't happen -
the file is correctly identified as a file!

2. Maybe there's a problem with the output file?  It is 11_892_316 bytes
at the error.
    NOPE: Used irb to append another several k to the file with seek then
putc - no problem there.

3. Is there a hidden runtime problem?
    RAM consumption?  NOPE, I've run the script on larger, though not
deeper directories without it crashing.  Though I would like to know
how to set the RAM usage.  Anyone?

    Stack problems?  NOT purely stack level: simple recursive program
bombs at level 760 with 'stack level too deep'.
    Other stack problems?  Alternating recursion with each loops?
	    Maybe, since 20 directories deep causing 50+ levels in the stack. 
And I am making either 1 or 2 new objects per call.

    Ruby + NTFS + WinXP = ?occasional problem?


Any help and ideas are much appreciated.

Thanks,

-Chris

-----------------
Try #1: IF file? ELSE treat it as a directory
Starting file fdata_Q Mon Feb 06 22:40:22 Central Standard Time 2006
drive7.rb:118:in `chdir': Invalid argument -
_EJSRemoteStatelessCrystalItemReconControllerHome_Tie.java (Errno::EINVAL)
...
         ... 55 levels...
...
Try #2 with drive8: do directory? THEN file? THEN try printing File.ftype:
C:\CHRIS\ruby\MyFiles>ruby drive8.rb Q
Starting file fdata_Q Mon Feb 06 23:45:27 Central Standard Time 2006
Finished file fdata_Q Mon Feb 06 23:58:37 Central Standard Time 2006
drive8.rb:139:in `ftype': No such file or directory -
_EJSRemoteStatelessCrystalItemReconControllerHome_Tie.java (Errno:
:ENOENT)
        from drive8.rb:139:in `get_dir_info_recursive'
        from drive8.rb:122:in `foreach'
        from drive8.rb:122:in `get_dir_info_recursive'
        from drive8.rb:128:in `get_dir_info_recursive'
        from drive8.rb:122:in `foreach'
        from drive8.rb:122:in `get_dir_info_recursive'
        from drive8.rb:128:in `get_dir_info_recursive'
        from drive8.rb:122:in `foreach'
         ... 54 levels...
        from drive8.rb:122:in `get_dir_info_recursive'
        from drive8.rb:163
        from drive8.rb:148:in `each'
        from drive8.rb:148