https://bugzilla.kernel.org/show_bug.cgi?id=95331 --- Comment #15 from Jason Vas Dias <jason.vas.dias@xxxxxxxxx> --- I'd also really like to know where precisely all this is meant to be specified / documented . The POSIX standards are rather vague on this, but do suggest that SIGIO is meant to be sent when I/O is possible on a file descriptor , regardless of whether it is readable or writable . -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html