debian man page for io_block

io_block(3)						     Library Functions Manual						       io_block(3)

NAME
       io_block - switch to blocking I/O

SYNTAX
       #include <io.h>

       void io_block(int64 fd);

DESCRIPTION
       io_block puts UNIX descriptor fd into ``blocking mode.''

       File descriptors are normally in blocking mode, except if they come from accept() or io_accept() and the listening socket was in non-block-
       ing mode.

SEE ALSO
       io_nonblock(3)

																       io_block(3)