Cope with another one of the many kinds of DocBook stupidity:

Instead of just using .br, DocBook sometimes fiddles with the
utterly unportable internal register \n[an-break-flag] that is
only available in the GNU implementation of man(7) and then arms
an input line trap to call the equally unportable internal macro
.an-trap that, in the GNU implementation, inspects that variable;
all the world is GNU, isn't it?

Since naddy@ reports that quite a few ports manuals suffer from
this insanity, let's just translate it to the intended .br.

Et ceterum censeo DocBookem esse delendam.

1 files changed, 11 insertions, 2 deletions

diff --git a/roff.c b/roff.c
index ad8c6eeb..1370a58b 100644
--- a/roff.c
+++ b/roff.c
@@ -2337,10 +2337,19 @@ roff_it(ROFF_ARGS)
 		return(ROFF_IGN);
 	}
 
-	/* Arm the input line trap. */
+	while (isspace((unsigned char)buf->buf[pos]))
+		pos++;
+
+	/*
+	 * Arm the input line trap.
+	 * Special-casing "an-trap" is an ugly workaround to cope
+	 * with DocBook stupidly fiddling with man(7) internals.
+	 */
 
 	roffit_lines = iv;
-	roffit_macro = mandoc_strdup(buf->buf + pos);
+	roffit_macro = mandoc_strdup(iv != 1 ||
+	    strcmp(buf->buf + pos, "an-trap") ?
+	    buf->buf + pos : "br");
 	return(ROFF_IGN);
 }