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Old 06-09-2010, 02:21 AM
Andres P
 
Default Rewrite early RTC device creation

On Tue, Jun 8, 2010 at 9:23 PM, Dan McGee <dpmcgee@gmail.com> wrote:
> We can also just do some bash string manipulation and leave sed out of
> the picture:
>
> devnum=$(cat /sys/class/rtc/rtc0/dev)
> /bin/mknod /dev/rtc0 c ${devnum/:/ }
>

Since you're already using a ${foo/bar/baz} bashism, that's a useless
use of cat:
devnum=$(< /sys/class/rtc/rtc0/dev)

And the subshell is also unnecesary:
read -r devnum < /sys/class/rtc/rtc0/dev

The second one is posix...

Andres P
 

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