Filelocking


#1

Hi All,

I have posted the same code b4, but could not find my original post,
however this is a different question. I am a newb, so here I go.
Thank you!

This is my error:

$ ruby test.rb
test.rb:46: undefined method flock' for main:Object (NoMethodError) from test.rb:45:inopen’
from test.rb:45
from test.rb:42:in `each’
from test.rb:42

Here is my code:

#!/usr/bin/ruby -w

require ‘ftools’
array1 = Dir.glob("*.log")
if ( array1.length >= 1 )
array1.each { |file|
File.copy(file, “#{file}.orig”)
if (File.size?(file) > FSIZE)
File.open(file, ‘r+’) do |f|
flock(f, File::LOCK_SH) do |f|
f << “i got a lock”
end
end
end
}
else
raise StandardError, “Array ‘array1’ has no values, logs will not be
rolled!”
end


#2

Derek S. wrote:

test.rb:46: undefined method `flock’ for main:Object (NoMethodError)

File.open(file, ‘r+’) do |f|
flock(f, File::LOCK_SH) do |f|

That should be File.flock.


#3

Joel VanderWerf wrote:

Derek S. wrote:

test.rb:46: undefined method `flock’ for main:Object (NoMethodError)

File.open(file, ‘r+’) do |f|
flock(f, File::LOCK_SH) do |f|

That should be File.flock.

OK tried that…thx!, but now I am seeing

STDERR

test.rb:46: undefined method flock' for File:Class (NoMethodError) from test.rb:45:inopen’
from test.rb:45
from test.rb:42:in `each’
from test.rb:42

CODE

if ( array1.length >= 1 )
array1.each { |file|
File.copy(file, “#{file}.orig”)
if (File.size?(file) > FSIZE)
File.open(file, ‘r+’) do |f|
File.flock(f, File::LOCK_SH) do |f|
f << “i got a lock”
end
end
end
}
else
raise StandardError, “Array ‘array1’ has no values, logs will not be
rolled!”
end


#4

Derek S. wrote:

Joel VanderWerf wrote:

Derek S. wrote:

test.rb:46: undefined method `flock’ for main:Object (NoMethodError)

File.open(file, ‘r+’) do |f|
flock(f, File::LOCK_SH) do |f|
That should be File.flock.

sorry, my fault… should be

f.flock(File::LOCK_SH) do

end

Take a look at ri flock for details.


#5
    from test.rb:45
    from test.rb:42:in `each'
    from test.rb:42

File#flock => f.flock

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