A better answer would probably be to write the update routines entirely in Ruby instead of calling out to other programs

You are right. A simple read-modify-write shouldn't be that hard in Ruby, making it atomar atomic by writing to a new file followed by a rename shouldn't be hard, either.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^4: One liner: remove ssh keys with quotemeta by afoken
in thread One liner: remove ssh keys with quotemeta by Anonymous Monk

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