| Message ID | 2297fc0ea49ad201d213950c7f32d7ab5e998163.1701390439.git.deborah.brouwer@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | v4l2-tracer: misc fixes and improvements | expand |
diff --git a/utils/v4l2-tracer/v4l2-tracer.cpp b/utils/v4l2-tracer/v4l2-tracer.cpp index 37e17eb6..05e5b368 100644 --- a/utils/v4l2-tracer/v4l2-tracer.cpp +++ b/utils/v4l2-tracer/v4l2-tracer.cpp @@ -16,9 +16,12 @@ pid_t tracee_pid = 0; void v4l2_tracer_sig_handler(int signum) { line_info("\n\tReceived signum: %d", signum); - kill(tracee_pid, signum); - /* Wait for tracee to handle the signal first before v4l2-tracer exits. */ - wait(nullptr); + + /* If there is a tracee, wait for it to handle the signal first before exiting. */ + if (tracee_pid) { + kill(tracee_pid, signum); + wait(nullptr); + } } enum Options {
Usually the v4l2-tracer will wait for its tracee to handle a signal e.g. from ctrl+c before the v4l2-tracer exits, but if there is no tracee, then the v4l2-tracer waits forever. Exit gracefully by waiting only if a tracee exists. Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com> --- utils/v4l2-tracer/v4l2-tracer.cpp | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)