On Thu, Jul 19, 2012 at 10:33:49AM +0200, Juergen Kilb wrote: > Nice for testing purposes.
Can we have an extra file with an extra config option for this? I agree this is nice for debugging, but no need to bloat every build with it. Sascha > > Signed-off-by: Juergen Kilb <[email protected]> > --- > commands/stddev.c | 39 +++++++++++++++++++++++++++++++++++++++ > 1 files changed, 39 insertions(+), 0 deletions(-) > > diff --git a/commands/stddev.c b/commands/stddev.c > index 098aea8..b807df6 100644 > --- a/commands/stddev.c > +++ b/commands/stddev.c > @@ -20,7 +20,9 @@ > */ > > #include <common.h> > +#include <clock.h> > #include <init.h> > +#include <stdlib.h> > > static ssize_t zero_read(struct cdev *cdev, void *buf, size_t count, loff_t > offset, ulong flags) > { > @@ -104,3 +106,40 @@ static int null_init(void) > } > > device_initcall(null_init); > + > +static ssize_t urandom_read(struct cdev *cdev, void *buf, size_t count, > loff_t offset, ulong flags) > +{ > + size_t i; > + unsigned int *buffer; > + > + buffer = (unsigned int *) buf; > + > + for (i = 0; i < (count / sizeof(size_t)); i++) > + buffer[i] = rand() | rand() << 16; > + > + return count; > +} > + > +static struct file_operations urandomops = { > + .read = urandom_read, > + .lseek = dev_lseek_default, > +}; > + > +static int urandom_init(void) > +{ > + struct cdev *cdev; > + > + cdev = xzalloc(sizeof(*cdev)); > + > + cdev->name = "urandom"; > + cdev->size = ~0; > + cdev->ops = &urandomops; > + > + devfs_create(cdev); > + > + srand(get_time_ns()); > + > + return 0; > +} > + > +device_initcall(urandom_init); > -- > 1.7.0.4 > > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
