The file descriptor is duplicated using dup(). You keep your copy
of the descriptor and the copy contained in @message will be closed
when @message is finalized.
A possible cause of failure is exceeding the per-process or
system-wide file descriptor limit.
Adds a file descriptor to @message.
The file descriptor is duplicated using dup(). You keep your copy of the descriptor and the copy contained in @message will be closed when @message is finalized.
A possible cause of failure is exceeding the per-process or system-wide file descriptor limit.