Avoid a very unlikely race when opening a temporary file #118
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The file could be created between the time the -e test fails and open "+>" is called, which would clobber the file. Using O_CREAT|O_EXCL to open the file prevents the problem.
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The file could be created between the time the -e test fails and open
"+>" is called, which would clobber the file. Using O_CREAT|O_EXCL to
open the file prevents the problem.