[PATCH] setconsole: open console for writing rather than reading

[Peter Korsgaard]

The console passed to TIOCCONS has to be writable, otherwise future
console writes will fail.

This presumably used to work, but in current kernels (see
drivers/tty/tty_io.c:redirected_tty_write) console writes are sent to
vfs_write(device), which checks if the device is writable. A quick look
in the linux git history doesn't show any recent changes to either tty_io
or vfs_write.

Signed-off-by: Peter Korsgaard <jacmet at sunsite.dk>
---
 console-tools/setconsole.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/console-tools/setconsole.c b/console-tools/setconsole.c
index 59c8336..771974a 100644
--- a/console-tools/setconsole.c
+++ b/console-tools/setconsole.c
@@ -41,6 +41,6 @@ int setconsole_main(int argc UNUSED_PARAM, char **argv)
 			device = DEV_CONSOLE;
 	}
 
-	xioctl(xopen(device, O_RDONLY), TIOCCONS, NULL);
+	xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL);
 	return EXIT_SUCCESS;
 }
-- 
1.7.5.1