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Add FIONREAD to pseudo-terminal master devices.

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All ioctl()'s that aren't implemented by pts(4) are forwarded to the TTY
itself. Unfortunately this is not correct for FIONREAD, because it will
give the wrong amount of bytes that are available to read.

Tested by:	keramida
Reminded by:	keramida
This commit is contained in:
Ed Schouten 2008-12-13 07:23:55 +00:00
parent 0a3604e155
commit d4892ee51e
1 changed files with 10 additions and 0 deletions
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10
sys/kern/tty_pts.c
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@ -273,6 +273,16 @@ ptsdev_ioctl(struct file *fp, u_long cmd, void *data,
case FIONBIO:
/* This device supports non-blocking operation. */
return (0);
case FIONREAD:
tty_lock(tp);
if (psc->pts_flags & PTS_FINISHED) {
/* Force read() to be called. */
*(int *)data = 1;
} else {
*(int *)data = ttydisc_getc_poll(tp);
}
tty_unlock(tp);
return (0);
case FIODGNAME: {
struct fiodgname_arg *fgn;
const char *p;