File deletion failed -- how to handle problem?


#1

Hi All,

I wrote a simple test a techiques I’ll apply in an app I’m going start
shortly. One thing my test did is: – -- open a non-existent file for
appending,
– populate it
– close it
– open it for reading, expecting automatic closure when reading ended
– looped through file printing its line to STDOUT
– attempted to delete the file – got “Permission denied -
TestOutput.txt (Errno::EACCES)”

I tested it under SciTE.

The relevant code fragment is listed below. I think the problem is
that the file is in the process of being closed by WindowsXP-Pro when
the delete request hits the OS and the OS complains.

If that’s correct, all I have to do is write some loop that naps and
re-attempts the deletion until successful. Is there better approach,
or is my analysis wrong in the first place?

********* Code fragment ****************
puts “\nDisplaying the content of #{fno}:”
puts “Opening #{fno}’”
File.open(fno, “r”) do |file| # Open for reading
while sLine = file.gets
puts sLine
end
end # File will be closed automantically when scope of “do” exited
puts “#{fno} closed”

puts “\nDeleting #{fno}”
File.delete(fno)


TIA,
Richard


#2

Richard schrieb:


Richard, your code works for me, when I run it from the command line. I
haven’t tried it with SciTE.

Regards,
Pit


#3

Worked for me:

ruby 1.8.2 (2004-12-25) [i386-mswin32]
SciTE Version 1.59


#4

Richard wrote:

Hi All,

end
end # File will be closed automantically when scope of “do” exited
puts “#{fno} closed”

puts “\nDeleting #{fno}”
File.delete(fno)


It looks like you’re passing around a fileno. If that’s the case, the
implication is that you’ve opened the filehandle somewhere else, but
haven’t closed it.

Also, you’re better off using IO.foreach(file) instead of the File.open
block you’ve got there.

Regards,

Dan