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.TH ndelay_on 3
.SH NAME
ndelay_on \- put file descriptor in non-blocking mode
.SH SYNTAX
.B #include <ndelay.h>
extern int \fBndelay_on\fP(int \fIfd\fR);
.SH 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 \fIerrno\fR
accordingly.
.SH "SEE ALSO"
fcntl(2), ndelay_off(3)