SVR5 and SCO OpenServer 5

M_ERROR(D7str)

M_ERROR -- report downstream error condition

Description

This message type is sent upstream by modules or drivers to report some downstream error condition. When the message reaches the stream head, the stream is marked so that all subsequent system calls issued to the stream, excluding close and poll, will fail with errno set to the first data byte of the message. POLLERR is set if the Stream is being polled (see poll). All processes sleeping on a system call to the Stream are awakened. An M_FLUSH message with an FLUSHRW argument is sent downstream.

Message type

Priority.

Version applicability

ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp, 7.1, 7.1mp, 8, 8mp
oddi: 1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp

References

streamio