diff options
Diffstat (limited to 'sys/dev/null/null.c')
| -rw-r--r-- | sys/dev/null/null.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sys/dev/null/null.c b/sys/dev/null/null.c index f7eaa77..ec0d521 100644 --- a/sys/dev/null/null.c +++ b/sys/dev/null/null.c @@ -33,6 +33,7 @@ #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/module.h> +#include <sys/disklabel.h> #include <sys/bus.h> #include <machine/bus.h> #include <machine/resource.h> @@ -43,6 +44,7 @@ static dev_t null_dev; static dev_t zero_dev; static d_write_t null_write; +static d_ioctl_t null_ioctl; static d_read_t zero_read; #define CDEV_MAJOR 2 @@ -54,7 +56,7 @@ static struct cdevsw null_cdevsw = { /* close */ (d_close_t *)nullop, /* read */ (d_read_t *)nullop, /* write */ null_write, - /* ioctl */ noioctl, + /* ioctl */ null_ioctl, /* poll */ nopoll, /* mmap */ nommap, /* strategy */ nostrategy, @@ -91,6 +93,20 @@ null_write(dev_t dev, struct uio *uio, int flag) } static int +null_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td) +{ + int error; + + if (cmd != DIOCGKERNELDUMP) + return (noioctl(dev, cmd, data, fflag, td)); + error = suser_td(td); + if (error) + return (error); + return (set_dumper(NULL)); +} + + +static int zero_read(dev_t dev, struct uio *uio, int flag) { u_int c; |
