SIGURG (23)SIGURG (23) — Urgent Socket Condition
Urgent or out-of-band data arrived on a socket.
ENOTCONNA send or receive operation was attempted on a socket that is not connected.
A data transfer was attempted on a socket that has not been connected with connect(), or the connection was terminated.
Call connect() before sending data on a stream socket. Check if the connection was lost and reconnect if necessary.
SIGURG (23)Urgent or out-of-band data arrived on a socket.
EACCESThe requested access to a file or resource is not allowed by the file permissions.
SIGUSR2 (12)A second user-defined signal for application-specific purposes. The default action is to terminate.
EAGAINThe requested operation would block on a non-blocking resource, or a system resource is temporarily unavailable.
ENOLCKThe system has exhausted its pool of file locks.
ENOTBLKA non-block device was specified where a block device is required.