AkousaEINTRA blocking system call was interrupted by a signal before it could complete.
A signal was delivered to the process while it was blocked in a system call such as read(), write(), or select(). The signal handler returned and the system call was not automatically restarted.
Retry the system call when EINTR is returned. Use the SA_RESTART flag with sigaction() to have the kernel automatically restart interrupted calls. Wrap blocking calls in a loop that checks for EINTR.
ENOSYSThe requested system call or function is not implemented on this system.
ENFILEThe system-wide limit on the total number of open files has been reached.
Exit 2A shell built-in was used incorrectly, or a command returned a usage error.
EMLINKThe maximum number of hard links to a single file has been exceeded.
EALREADYA non-blocking connection attempt is already in progress on this socket.
EADDRINUSEThe specified network address and port combination is already bound by another socket.