runqemu: check the qemu PID has been set before kill()ing it

If runqemu is killed, check that we have a valid PID for the qemu before
sending a kill() to it.

[ YOCTO #14651 ]

(From OE-Core rev: 7f95eb486a2d07cf0c821d5301fd670de34fe2d1)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 0f3afbd3a6a6bef668612f818517df7543c0a683)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/scripts/runqemu b/scripts/runqemu
index 10880ba6bb..51607f10e5 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -1516,7 +1516,8 @@ def main():
 
         def sigterm_handler(signum, frame):
             logger.info("SIGTERM received")
-            os.kill(config.qemupid, signal.SIGTERM)
+            if config.qemupid:
+                os.kill(config.qemupid, signal.SIGTERM)
             config.cleanup()
             # Deliberately ignore the return code of 'tput smam'.
             subprocess.call(["tput", "smam"])