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27061a274f
Add SIGTERM handler so that runqemu could clean things up correctly when receving such signal. This problem was originally observed when running testimage. On some hosts, after running testimage task, the user has to manually operate on the tap interface (e.g. `sudo ip link del tap0') in order for the next runqemu command to launch successfully. The problem is about runqemu, SIGTERM and network manager on the host. In testimage task, the runqemu process will receive SIGTERM. In such situation, its cleanup() function is not run, resulting in tap interface not cleaned up. On some hosts, the network manager will bring down the tap interface automatically, thus this problem. I saw this problem on Fedora21. I think we'd better just clean up the tap interface ourselves. So this patch adds to runqemu a SIGTERM handler, in which the actual qemu process is terminated and other things cleaned up. (From OE-Core rev: 02709d4709c56f9b9095e3555da35b659b03a8a3) Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.