EINTR is retried automatically if you use sigaction() and set the SA_RESTART flag. If you use signal() instead of sigaction() it depends on your OS whether EIN

EINTR is retried automatically if you use sigaction() and set the SA_RESTART flag. If you use signal() instead of sigaction() it depends on your OS whether EINTR is automatically retried - never use signal(). (There's a few exceptions still - partial completed syscalls, e.g. a signal can cause read() to return partial data or sleep() to return before it should - neither case gives you EINTR though)