Number of bytes in terminal input queue w/o blocking and consuming? Post: 302282265

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mq_setattr

mq_setattr(2)							System Calls Manual						     mq_setattr(2)

NAME

       mq_setattr - set the blocking status of a message queue associated with a descriptor

SYNOPSIS

DESCRIPTION

       The system call changes the blocking status of a message queue associated with the descriptor, mqdes.  The blocking status that is modified
       is per message queue descriptor and another open descriptor for the same message queue can have a different blocking status.

       The argument mqstat, points to an structure that specifies the blocking status desired. More specifically, if the bit in the mq_flags field
       of the structure is set, the descriptor is marked as non-blocking. Otherwise it is marked as blocking.

       If omstat is non-NULL, will store in the structure referenced by omqstat, the previous message queue attributes and the queue blocking sta-
       tus associated with this mqdes.	The values returned are the same as would be returned by a call to

       To use this function, link in the realtime library by specifying on the compiler or linker command line.

RETURN VALUE

       returns the following values:

	      Successful completion.

	      Failure.
		   is set to indicate the error.

ERRORS

       If fails, is set to one of the following values:

	      [EBADF]	     mqdes is not a valid message queue descriptor.

	      [EINVAL]	     mqstat does not point to a valid structure, or omqstat is non-NULL and does not point to a valid structure.

	      [ENOSYS]	     is not supported by the implementation.

SEE ALSO

       mq_getattr(2), mq_open(2).

STANDARDS CONFORMANCE

																     mq_setattr(2)

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