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.TH "WRITE_CHAN" "9" "09 October 2005" "" ""

.SH NAME
write_chan \- write function for tty
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
ssize_t write_chan  (struct tty_struct * \fItty\fB, struct file * \fIfile\fB, const unsigned char * \fIbuf\fB, size_t \fInr\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fItty\fB\fR
tty device
.TP
\fB\fIfile\fB\fR
file object
.TP
\fB\fIbuf\fB\fR
userspace buffer pointer
.TP
\fB\fInr\fB\fR
size of I/O
.SH "DESCRIPTION"
.PP
Write function of the terminal device. This is serialized with
respect to other write callers but not to termios changes, reads
and other such events. We must be careful with N_TTY as the receive
code will echo characters, thus calling driver write methods.
.PP
This code must be sure never to sleep through a hangup.