jes.soren...@redhat.com writes:
> From: Jes Sorensen <jes.soren...@redhat.com>
>
> Change the signal handling to indicate a signal is pending, rather
> then printing directly from the signal handler.
>
> In addition make the signal prints go to stderr, rather than stdout.
>
> Signed-off-by: Jes Sorensen <jes.soren...@redhat.com>
> ---
> qemu-progress.c | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/qemu-progress.c b/qemu-progress.c
> index e1feb89..27a2310 100644
> --- a/qemu-progress.c
> +++ b/qemu-progress.c
> @@ -32,6 +32,7 @@ struct progress_state {
> float current;
> float last_print;
> float min_skip;
> + int print_pending;
To be pedantically correct: volatile sig_atomic_t print_pending
> void (*print)(void);
> void (*end)(void);
> };
I don't care for wrapping a file's static global variables in a struct,
but I guess that's water under the bridge now.
> @@ -63,12 +64,16 @@ static void progress_simple_init(void)
> #ifdef CONFIG_POSIX
> static void sigusr_print(int signal)
> {
> - printf(" (%3.2f/100%%)\n", state.current);
> + state.print_pending = 1;
> }
> #endif
>
> static void progress_dummy_print(void)
> {
> + if (state.print_pending) {
> + fprintf(stderr, " (%3.2f/100%%)\n", state.current);
> + state.print_pending = 0;
> + }
> }
>
> static void progress_dummy_end(void)
