On Mon, Oct 6, 2014 at 5:08 AM, Dimitris Papastamos <s...@2f30.org> wrote: > I am using select(2) on a FIFO fd and monitoring > for readability. select(2) doesn't return after the writer > exits. > > The same piece of code marks the fd as readable on Linux. > Not sure which behaviour is correct though.
The Linux behavior is correct: http://pubs.opengroup.org/onlinepubs/9699919799/functions/pselect.html: "A descriptor shall be considered ready for reading when a call to an input function with O_NONBLOCK clear would not block, whether or not the function would transfer data successfully. (The function might return data, an end-of-file indication, or an error other than one indicating that it is blocked, and in each of these cases the descriptor shall be considered ready for reading.)" http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html: "When attempting to read from an empty pipe or FIFO: [...] If no process has the pipe open for writing, read() shall return 0 to indicate end-of-file."
