Below DIAGNOSTICS, document the SYSERR message level;

jmc@ wondered what it meant and agrees with this patch.

1 files changed, 7 insertions, 4 deletions

diff --git a/usr.bin/mandoc/mandoc.1 b/usr.bin/mandoc/mandoc.1
index d0ac31d1831..0c094b17fea 100644
--- a/usr.bin/mandoc/mandoc.1
+++ b/usr.bin/mandoc/mandoc.1
@@ -1,6 +1,7 @@
-.\"	$OpenBSD: mandoc.1,v 1.57 2014/06/20 22:58:41 schwarze Exp $
+.\"	$OpenBSD: mandoc.1,v 1.58 2014/06/23 22:03:03 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+.\" Copyright (c) 2012, 2014 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above
@@ -14,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: June 20 2014 $
+.Dd $Mdocdate: June 23 2014 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -523,6 +524,9 @@ fields are omitted when meaningless.
 .Pp
 Message levels have the following meanings:
 .Bl -tag -width "warning"
+.It Cm syserr
+Opening or reading an input file failed, so the parser cannot
+even be started and no output is produced from that input file.
 .It Cm fatal
 The parser is unable to parse a given input file at all.
 No formatted output is produced from that input file.
@@ -558,8 +562,7 @@ output mode.
 The
 .Nm
 utility may also print messages related to invalid command line arguments
-or operating system errors, for example when memory is exhausted or
-input files cannot be read.
+or operating system errors, for example when memory is exhausted.
 Such messages may not carry the prefix described above.
 .Sh COMPATIBILITY
 This section summarises