2 files changed, 23 insertions, 9 deletions

diff --git a/sbin/mount_std/mount_std.8 b/sbin/mount_std/mount_std.8
index f8d22a42cddb..15fc65e8be3c 100644
--- a/sbin/mount_std/mount_std.8
+++ b/sbin/mount_std/mount_std.8
@@ -34,7 +34,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$Id$
+.\"	$Id: mount_std.8,v 1.1 1996/05/13 17:43:16 wollman Exp $
 .\"
 .Dd May 13, 1996
 .Dt MOUNT_STD 8
@@ -80,7 +80,11 @@ it was called) to determine the type of filesystem to be mounted.  If
 it is called by a name which does not end in
 .Dq Li _ Ns Ar fsname ,
 .Nm
-will issue a diagnostic and return an error.  The
+will assume (for compatibility
+with
+.Xr mount 8 )
+that the zeroth argument contains only the name of the filesystem type.
+The
 .Nm
 command is normally installed with appropriate links to commands for
 the distributed filesystems which can be mounted in this way;
@@ -93,8 +97,8 @@ command.
 .It argv[0] must end in _fsname
 The
 .Nm mount_std
-command was called with a zero'th argument which does not specify a
-filesystem type to be mounted.
+command was called with a zero'th argument of
+.Dq Li mount_std .
 .It vfsload(%s)
 .Nm
 was unable to load a kernel module implementing the %s filesystem
diff --git a/sbin/mount_std/mount_std.c b/sbin/mount_std/mount_std.c
index 5d0615a1ac61..6ca3339e45f8 100644
--- a/sbin/mount_std/mount_std.c
+++ b/sbin/mount_std/mount_std.c
@@ -43,7 +43,7 @@ char copyright[] =
 
 #ifndef lint
 static const char rcsid[] =
-	"$Id$";
+	"$Id: mount_std.c,v 1.1 1996/05/13 17:43:16 wollman Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -74,11 +74,21 @@ main(argc, argv)
 	int ch, mntflags;
 	struct vfsconf *vfc;
 
+	/*
+	 * XXX
+	 * mount(8) calls the mount programs with an argv[0] which is
+	 * /just/ the filesystem name.  So, if there is no underscore
+	 * in argv[0], we assume that we are being called from mount(8)
+	 * and that argv[0] is thus the name of the filesystem type.
+	 */
 	fsname = strrchr(argv[0], '_');
-	if (!fsname || strcmp(fsname, "_std") == 0)
-		errx(EX_USAGE, "argv[0] must end in _fsname");
-
-	fsname++;
+	if (fsname) {
+		if (strcmp(fsname, "_std") == 0)
+			errx(EX_USAGE, "argv[0] must end in _fsname");
+		fsname++;
+	} else {
+		fsname = argv[0];
+	}
 
 	mntflags = 0;
 	while ((ch = getopt(argc, argv, "o:")) != EOF)