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io_wantread(3)		    Library Functions Manual		  io_wantread(3)

NAME
     io_wantread - signal that you want to read from a descriptor

SYNTAX
     #include <libowfat/io.h>

     void io_wantread(int64 fd);

DESCRIPTION
     io_wantread  tells  the  next io_wait() that you want to read from this de-
     scriptor.	Call io_dontwantread() again if you change your mind.

     The next time you call io_wait(), it will look whether this descriptor  be-
     comes  readable,  too.   You can then use io_canread() to check whether the
     descriptor has become readable.

     You have to have called io_fd on the descriptor first (io_pipe and io_sock-
     etpair do this for you).  Waiting on descriptors only  works  for	sockets,
     fifos  and  pipes.  It may also work on devices and TTYs, but that is plat-
     form dependent -- you should not rely on that.

SEE ALSO
     io_wait(3), io_canread(3), io_wantread(3), io_fd(3)

								  io_wantread(3)

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