> > returns 3 and sets errno to zero. Note that "setting errno to zero" is not guaranteed in case of a successful completion of a library function or a system call. Generally, "errno" reflects an error that occurred last when such a call failed (so in other words, in case of a successful completion, "errno" can still carry over an error from a previously failed call). In this particular use case, it looks like "errno" was clear from the get go because nothing was called prior to "shm_open()", and so it remained so when the call returned (successfully).
HTH, Anton Lavrentiev Contractor NIH/NLM/NCBI -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
