===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.100
retrieving revision 1.105
diff -u -p -r1.100 -r1.105
--- mandoc/mandoc.1	2011/12/25 19:35:44	1.100
+++ mandoc/mandoc.1	2014/06/23 22:03:30	1.105
@@ -1,6 +1,7 @@
-.\"	$Id: mandoc.1,v 1.100 2011/12/25 19:35:44 kristaps Exp $
+.\"	$Id: mandoc.1,v 1.105 2014/06/23 22:03:30 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: December 25 2011 $
+.Dd $Mdocdate: June 23 2014 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -23,6 +24,9 @@
 .Sh SYNOPSIS
 .Nm mandoc
 .Op Fl V
+.Sm off
+.Op Fl I Cm os Li = Ar name
+.Sm on
 .Op Fl m Ns Ar format
 .Op Fl O Ns Ar option
 .Op Fl T Ns Ar output
@@ -49,6 +53,15 @@ output.
 .Pp
 The arguments are as follows:
 .Bl -tag -width Ds
+.Sm off
+.It Fl I Cm os Li = Ar name
+.Sm on
+Override the default operating system
+.Ar name
+for the
+.Xr mdoc 7
+.Sq \&Os
+macro.
 .It Fl m Ns Ar format
 Input format.
 See
@@ -334,7 +347,7 @@ for font style specification and available command-lin
 Translate input format into
 .Xr man 7
 output format.
-This is useful for distributing manual sources to legancy systems
+This is useful for distributing manual sources to legacy systems
 lacking
 .Xr mdoc 7
 formatters.
@@ -485,9 +498,7 @@ parser:
 .Sh DIAGNOSTICS
 Standard error messages reporting parsing errors are prefixed by
 .Pp
-.Sm off
-.D1 Ar file : line : column : \ level :
-.Sm on
+.D1 Nm Ns : Ar file : Ns Ar line : Ns Ar column : level :
 .Pp
 where the fields have the following meanings:
 .Bl -tag -width "column"
@@ -505,8 +516,17 @@ points to the first character of the word.
 The message level, printed in capital letters.
 .El
 .Pp
+The
+.Ar line
+and
+.Ar column
+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.
@@ -542,9 +562,8 @@ 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.
-Such messages do not carry the prefix described above.
+or operating system errors, for example when memory is exhausted.
+Such messages may not carry the prefix described above.
 .Sh COMPATIBILITY
 This section summarises
 .Nm
@@ -637,8 +656,7 @@ lists render similarly.
 The
 .Nm
 utility was written by
-.An Kristaps Dzonsons ,
-.Mt kristaps@bsd.lv .
+.An Kristaps Dzonsons Aq Mt kristaps@bsd.lv .
 .Sh CAVEATS
 In
 .Fl T Ns Cm html