On Dec 11, 2011, at 8:36 AM, abhinav narain wrote:
> the return value of error is -1,
> EINTR is 4.
For many UN*X APIs, "the return value" and "the error" are not the same; "the
return value" on an error is -1, and "the error" is in the variable "errno".
The select() man page on my system (not a Linux distribution, but that doesn't
matter, UN*Xes are all the same here) says:
RETURN VALUES
Select() returns the number of ready descriptors that are contained in
the descriptor sets, or -1 if an error occurred. If the time limit
expires, select() returns 0. If select() returns with an error, includ-
ing one due to an interrupted call, the descriptor sets will be unmodi-
fied and the global variable errno will be set to indicate the error.
so it's one of those APIs.
What you should do is to, if select() returns -1 *and* errno is EINTR, just
ignore the error and continue looping.
> Also, it keeps printing ": Resource temporarily unavailable"
> though I don't have any error statement to be printed.
What is "it"? Your program? Or just *some* program?
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