Add a --to option to build_image

Add a --to option to build_image

That way we can directly build an image onto a usb stick/sd card without a separate step.
Also, add mounting of /sys into the chroot that is needed by build_gpt on a block device.

[adlr, 2010-04-01 22:47:07]

LGTM w/ comment

http://codereview.chromium.org/1521012/diff/1/2
File src/scripts/build_gpt.sh (right):

http://codereview.chromium.org/1521012/diff/1/2#newcode148
src/scripts/build_gpt.sh:148: if [ ! -w "$OUTDEV" ] ; then
maybe [ -b "$OUTDEV" ] is better?
-b means "it is a block device"

[piman, 2010-04-01 22:53:20]

On Thu, Apr 1, 2010 at 3:47 PM, <adlr@chromium.org> wrote:

> LGTM w/ comment
>
>
> http://codereview.chromium.org/1521012/diff/1/2
> File src/scripts/build_gpt.sh (right):
>
> http://codereview.chromium.org/1521012/diff/1/2#newcode148
> src/scripts/build_gpt.sh:148: if [ ! -w "$OUTDEV" ] ; then
> maybe [ -b "$OUTDEV" ] is better?
> -b means "it is a block device"


Argument is, if you can't write to it as a user (for any reason), try it as
root. That way if the user has permission to the block device, it works
without sudo.


>
> http://codereview.chromium.org/1521012
>

[adlr, 2010-04-01 22:54:53]

On Thu, Apr 1, 2010 at 3:52 PM, Antoine Labour <piman@chromium.org> wrote:

>
>
> On Thu, Apr 1, 2010 at 3:47 PM, <adlr@chromium.org> wrote:
>
>> LGTM w/ comment
>>
>>
>> http://codereview.chromium.org/1521012/diff/1/2
>> File src/scripts/build_gpt.sh (right):
>>
>> http://codereview.chromium.org/1521012/diff/1/2#newcode148
>> src/scripts/build_gpt.sh:148: if [ ! -w "$OUTDEV" ] ; then
>> maybe [ -b "$OUTDEV" ] is better?
>> -b means "it is a block device"
>
>
> Argument is, if you can't write to it as a user (for any reason), try it as
> root. That way if the user has permission to the block device, it works
> without sudo.
>
>
ah, sounds fine


>
>>
>> http://codereview.chromium.org/1521012
>>
>
>