Sync usage with SYNOPSIS, mention that -x may use stdout

Feedback from jmc and Crystal Kolipe
OK jmc

diff --git a/usr.sbin/rdsetroot/rdsetroot.8 b/usr.sbin/rdsetroot/rdsetroot.8
index 2fc4089..9ec0298 100644 (file)
--- a/usr.sbin/rdsetroot/rdsetroot.8
+++ b/usr.sbin/rdsetroot/rdsetroot.8
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: rdsetroot.8,v 1.2 2019/04/05 21:44:32 schwarze Exp $
+.\"    $OpenBSD: rdsetroot.8,v 1.3 2023/01/20 17:15:22 kn Exp $
 .\"
 .\" Copyright (c) 2019 Theo de Raadt
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 5 2019 $
+.Dd $Mdocdate: January 20 2023 $
 .Dt RDSETROOT 8
 .Os
 .Sh NAME
@@ -45,6 +45,11 @@ Debug.
 Rather than inserting, extract the
 .Ar disk.fs
 image.
+If
+.Ar disk.fs
+is not specified,
+.Nm
+writes to standard output.
 The disk can be made accessible using
 .Xr vnconfig 8 ,
 filesystems can be manipulated, and finally re-inserted into the RAMDISK kernel.

diff --git a/usr.sbin/rdsetroot/rdsetroot.c b/usr.sbin/rdsetroot/rdsetroot.c
index dcc705f..fc2e7e0 100644 (file)
--- a/usr.sbin/rdsetroot/rdsetroot.c
+++ b/usr.sbin/rdsetroot/rdsetroot.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rdsetroot.c,v 1.3 2021/10/24 21:24:19 deraadt Exp $ */
+/* $OpenBSD: rdsetroot.c,v 1.4 2023/01/20 17:15:22 kn Exp $ */
 
 /*
  * Copyright (c) 2019 Sunil Nimmagadda <sunil@openbsd.org>
@@ -294,6 +294,6 @@ usage(void)
 {
        extern char *__progname;
 
-       fprintf(stderr, "usage: %s [-dx] bsd [fs]\n", __progname);
+       fprintf(stderr, "usage: %s [-dx] kernel [disk.fs]\n", __progname);
        exit(1);
 }