functions: Edit regex for is_root() function

The regex for the is_root() needs to be updated to
extract the user ID number properly.

Otherwise, errors such as this one will come up:
cpuhotplug_sanity.sh[28]: 0(root): bad number

This patch would fix bug #1889:
https://bugs.linaro.org/show_bug.cgi?id=1889

Signed-off-by: Lisa Nguyen <lisa.nguyen@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/functions.sh b/include/functions.sh
index bb71302..ab73e4a 100644
--- a/include/functions.sh
+++ b/include/functions.sh
@@ -408,7 +408,7 @@ is_root() {
         ret=$(id -u)
     else
         # for android
-        ret=$(id | sed -n 's/uid=//p' | sed -n 's/(root) [a-z]*=[0-9]*(log)//p')
+        ret=$(id | awk '{if ($1) print $1}' | sed 's/[^0-9]*//g')
     fi
     return $ret
 }