C:recv
receive a message from a connected socket.
Errors
The recv() function shall fail if:
- EAGAIN or EWOULDBLOCK
- The socket's file descriptor is marked O_NONBLOCK and no data is waiting to be received; or MSG_OOB is set and no out-of-band data is available and either the socket's file descriptor is marked O_NONBLOCK or the socket does not support blocking to await out-of-band data.
- EBADF
- The socket argument is not a valid file descriptor.
- ECONNRESET
- A connection was forcibly closed by a peer. (See the RST TCP packet)
- EINTR
- The recv() function was interrupted by a signal that was caught, before any data was available.
- EINVAL
- The MSG_OOB flag is set and no out-of-band data is available.
- ENOTCONN
- A receive is attempted on a connection-mode socket that is not connected.
- ENOTSOCK
- The socket argument does not refer to a socket.
- EOPNOTSUPP
- The specified flags are not supported for this socket type or protocol.
- ETIMEDOUT
- The connection timed out during connection establishment, or due to a transmission timeout on active connection.
The recv() function may fail if:
- EIO
- An I/O error occurred while reading from or writing to the file system.
- ENOBUFS
- Insufficient resources were available in the system to perform the operation.
- ENOMEM
- Insufficient memory was available to fulfill the request.