scripts/runqemu: show an error if /dev/net/tun is unusable
If /dev/net/tun is either not present or is not writable by the user, then show an appropriate error message. (QEMU needs access to this device in order to enable networking; it may be missing if it is not enabled or loaded into the kernel, and some distributions such as CentOS 5.x set restrictive permissions upon it.) (From OE-Core rev: a00b94900d437828f25debce1c30ffcc0bbf29e9) (From OE-Core rev: b66fa6238a8f9c0972a60932941997517826ff03) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -194,6 +194,14 @@ while [ $i -le $# ]; do
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i=$((i + 1))
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done
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if [ ! -c /dev/net/tun ] ; then
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echo "TUN control device /dev/net/tun is unavailable; you may need to enable TUN (e.g. sudo modprobe tun)"
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exit 1
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elif [ ! -w /dev/net/tun ] ; then
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echo "TUN control device /dev/net/tun is not writable, please fix (e.g. sudo chmod 666 /dev/net/tun)"
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exit 1
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fi
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YOCTO_KVM_WIKI="https://wiki.yoctoproject.org/wiki/How_to_enable_KVM_for_Poky_qemu"
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# Detect KVM configuration
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if [[ "x$KVM_ENABLED" == "xyes" ]]; then
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