diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2003-10-04 16:47:18 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2003-10-04 16:47:18 +0000 |
| commit | 09ba5264ad9970bc5673c1e99472bcb38808508e (patch) | |
| tree | cb07503383de28a281cd3dc56373e6bc2d32da32 /share/man/man4/tb.4 | |
| parent | 8defeb39e797f0002789cfe494a0a335694f41d3 (diff) | |
clarification of how read works; from d
Diffstat (limited to 'share/man/man4/tb.4')
| -rw-r--r-- | share/man/man4/tb.4 | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/share/man/man4/tb.4 b/share/man/man4/tb.4 index 47620422b19..ffb95948d96 100644 --- a/share/man/man4/tb.4 +++ b/share/man/man4/tb.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: tb.4,v 1.7 2003/07/09 13:26:20 jmc Exp $ +.\" $OpenBSD: tb.4,v 1.8 2003/10/04 16:47:17 deraadt Exp $ .\" $NetBSD: tb.4,v 1.3.6.1 1996/05/31 00:37:45 cgd Exp $ .\" .\" Copyright (c) 1986, 1991 Regents of the University of California. @@ -89,6 +89,15 @@ and operating mode by .Em or Ns -ing the two values together. .Pp +Calling +.Xr read 2 +on the device always succeeds, returning the last sample, +although the +.Xr select 2 +and +.Xr poll 2 +system calls will correctly report the read state for new samples. +.Pp The line discipline supports digitizing devices which are compatible with Hitachi, .Tn GTCO , |