debian man page for ndelay_on

ndelay_on(3)						     Library Functions Manual						      ndelay_on(3)

NAME
       ndelay_on - put file descriptor in non-blocking mode

SYNTAX
       #include <ndelay.h>

       extern int ndelay_on(int fd);

DESCRIPTION
       ndelay_on  puts	a  file  descriptor in non-blocking mode.  Reading from and writing to non-blocking network sockets, FIFOs or device files
       will return immediately, even if not as many bytes have been processed as were specified.

       If an error occurred, ndelay_on will return nonzero and set errno accordingly.

SEE ALSO
       fcntl(2), ndelay_off(3)

																      ndelay_on(3)