Open System Services System Calls Reference Manual (G06.25+, H06.03+)

System Functions (r) recvmsg(2)

[ECONNRESET]

One of these conditions occurred:

• The transport-provider process for this socket is no longer available.

• The TCP/IP subsystem for this socket is no longer available.

• The connection was forcibly closed by the peer socket.

The socket can only be closed.

[EFAULT] A user-supplied memory buffer cannot be accessed or written.

[EINTR] A signal interrupted the function before any data was available.

[EINVAL] One of these conditions occurred:

• The MSG_OOB value is speciﬁed in the ﬂags parameter, and no out-of-

band data is available.

• The sum of the values speciﬁed for the msg_iovlen ﬁeld of the msghdr

structure is too large for a data item of type ssize_t.

• The socket belongs to the AF_INET or AF_INET6 domain, and the

function call requested msg_control data.

• The socket belongs to the AF_UNIX domain, and the size of

msg_controllen is less than the size of the cmsghdr structure plus one

ﬁle descriptor.

[EIO] An input or output error occurred.

[EMFILE] The socket is in the AF_UNIX domain, and processing the cmsghdr structure

would cause the receiving process to exceed OPEN_MAX.

[ENOBUFS] Not enough buffer space was available to complete the call. A retry at a later

time might succeed.

[ENOMEM] Required memory resources were not available. A retry at a later time might

succeed.

[ENOTCONN] A receive operation was attempted on a connection-oriented socket that is not

connected.

[ENOTSOCK] The socket parameter does not refer to a socket.

[EOPNOTSUPP]

A speciﬁed value for the ﬂags parameter is not supported for this socket type.

[ETIMEDOUT]

A transmission timed out on an active connection.

[EWOULDBLOCK]

The socket ﬁle descriptor is marked nonblocking (O_NONBLOCK is set), and

the operation would block.

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