diff options
Diffstat (limited to 'scripts/poky-qemu-ifup')
| -rwxr-xr-x | scripts/poky-qemu-ifup | 53 |
1 files changed, 19 insertions, 34 deletions
diff --git a/scripts/poky-qemu-ifup b/scripts/poky-qemu-ifup index 5ae6c6aefb..cd4c47b608 100755 --- a/scripts/poky-qemu-ifup +++ b/scripts/poky-qemu-ifup @@ -6,14 +6,17 @@ # tunctl which does not support the group permissions option, hence # the need to use Poky's version. # -# If this script is being run standalone in order to set up a bank of tap -# devices for later qemu use, then a group id must be the first argument. -# The resulting tap device will be group-owned by this group, and qemu -# users must be members of this group. +# If you find yourself calling this script a lot, you can add the +# the following to your /etc/sudoers file to be able to run this +# command without entering your password each time: # -# If the kernel is too old to support TUNSETGROUP, then a user must be passed -# in as the second argument, the tap device will be owned by that user, and -# only that user will be able to use it. +# <my-username> ALL=NOPASSWD: /path/to/poky-qemu-ifup +# <my-username> ALL=NOPASSWD: /path/to/poky-qemu-ifdown +# +# If you'd like to create a bank of tap devices at once, you should use +# the poky-gen-tapdevs script instead. If tap devices are set up using +# that script, the poky-qemu script will never end up calling this +# script. # # Copyright (c) 2006-2010 Intel Corp. # @@ -31,26 +34,24 @@ # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. usage() { - echo "$0 <gid> {uid} <native-sysroot-basedir>" - echo "Where uid is *only* included if this script complains when it's missing" + echo "sudo $0 <gid> <native-sysroot-basedir>" } -if [[ $# -lt 2 || $# -gt 3 ]]; then +if [ $EUID -ne 0 ]; then + echo "Error: This script (poky-qemu-ifup) must be run with root privileges" + exit 1 +fi + +if [ $# -ne 2 ]; then usage exit 1 fi -USER="" GROUP="-g $1" -if [ $# -eq 2 ]; then - NATIVE_SYSROOT_DIR=$2 -else - USER=$2 - NATIVE_SYSROOT_DIR=$3 -fi +NATIVE_SYSROOT_DIR=$2 TUNCTL=$NATIVE_SYSROOT_DIR/usr/bin/tunctl -if [ ! -e "$TUNCTL" ]; then +if [ ! -x "$TUNCTL" ]; then echo "Error: Unable to find tunctl binary in '$NATIVE_SYSROOT_DIR/usr/bin'" if [[ "$NATIVE_SYSROOT_DIR" =~ ^\/opt\/poky ]]; then @@ -64,22 +65,6 @@ fi TAP=`$TUNCTL -b $GROUP 2>&1` STATUS=$? -if [[ "$TAP" =~ "TUNSETGROUP" ]]; then - # TUNSETGROUP failed because of permissions or the kernel being too old - # Retry, falling back to a specific user - if [ "$USER" = "" ]; then - echo "TUNSETGROUP failed - add a username to the command line in order" - echo "to have the tap device owned by that user" - exit 1 - fi - TAP=`$TUNCTL -b -u $USER 2>&1` - STATUS=$? - # Force this to appear on stderr in order that the user sees it if this - # is running from poky-qemu-internal and in order to avoid having this - # output confuse it. - echo "Only user $USER will be able to use $TAP - upgrade the kernel to " 1>&2 - echo "2.6.23 or later in order to allow group access to tap devices" 1>&2 -fi if [ $STATUS -ne 0 ]; then echo "tunctl failed:" echo $TAP |