Author: ed
Date: Fri Jan 2 23:39:29 2009
New Revision: 186707
URL: http://svn.freebsd.org/changeset/base/186707
Log:
Fix a corner case in my previous commit.
Even though there are not many setups that have absolutely no console
device, make sure a close() on a TTY doesn't dereference a null pointer.
Modified:
head/sys/kern/tty.c
Modified: head/sys/kern/tty.c
==============================================================================
--- head/sys/kern/tty.c Fri Jan 2 23:32:43 2009 (r186706)
+++ head/sys/kern/tty.c Fri Jan 2 23:39:29 2009 (r186707)
@@ -312,7 +312,8 @@ ttydev_close(struct cdev *dev, int fflag
* Don't actually close the device if it is being used as the
* console.
*/
- if (strcmp(dev_console_filename, tty_devname(tp)) == 0)
+ if (dev_console_filename != NULL &&
+ strcmp(dev_console_filename, tty_devname(tp)) == 0)
return (0);
tty_lock(tp);
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