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| author | ed <ed@FreeBSD.org> | 2009-01-02 23:39:29 +0000 |
|---|---|---|
| committer | ed <ed@FreeBSD.org> | 2009-01-02 23:39:29 +0000 |
| commit | fa1537b9485c0b99a15acc74fd9f508e9e393d53 (patch) | |
| tree | 53a4821044facdbd034ecd6a2f583b1719a5fbff /sys/kern/tty.c | |
| parent | 8244396e7993d849d44c2b53c2407aa462e329d6 (diff) | |
| download | FreeBSD-src-fa1537b9485c0b99a15acc74fd9f508e9e393d53.zip FreeBSD-src-fa1537b9485c0b99a15acc74fd9f508e9e393d53.tar.gz | |
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.
Diffstat (limited to 'sys/kern/tty.c')
| -rw-r--r-- | sys/kern/tty.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/kern/tty.c b/sys/kern/tty.c index d1ed02f..16901bb 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -312,7 +312,8 @@ ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td) * 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); |
