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fd = open(ms, O_CREAT|O_EXCL|O_WRONLY|O_TRUNC); |
Note that technically it is also incorrect to pass a third argument to open() when not creating a new file (that is, with the O_CREAT flag not set). A POSIX implementation could, if it wished, return an EINVAL error in this case. However, in practise it is unlikely to cause a problem.
Compliant Solution (Variadic Functions)
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