On Fri, 23 Sep 2022, David Holland wrote:
While my inclination would be to make it work, until someone wants to
figure out how to do that it seems straightforward to make O_NONBLOCK
fail:
Index: tty_ptm.c
===================================================================
RCS file: /cvsroot/src/sys/kern/tty_ptm.c,v
retrieving revision 1.43
diff -u -p -r1.43 tty_ptm.c
--- tty_ptm.c 29 Jun 2021 22:40:53 -0000 1.43
+++ tty_ptm.c 23 Sep 2022 20:12:07 -0000
@@ -338,6 +338,10 @@ ptmopen(dev_t dev, int flag, int mode, s
dev_t ttydev;
struct mount *mp;
+ if (flag & O_NONBLOCK) {
+ return EINVAL;
+ }
+
Or:
```
if (flags & ~(O_RDWR | O_NOCTTY))
return EINVAL;
```
-RVP
