jes.soren...@redhat.com writes:
> From: Jes Sorensen <jes.soren...@redhat.com>
>
> This introduces support for dd-style progress reporting on POSIX
> systems, if the user hasn't specified -p to report progress. If sent a
> SIGUSR1, qemu-img will report current progress for commands that
> support progress reporting.
>
> Signed-off-by: Jes Sorensen <jes.soren...@redhat.com>
> ---
> qemu-progress.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++-----
> 1 files changed, 48 insertions(+), 5 deletions(-)
>
> diff --git a/qemu-progress.c b/qemu-progress.c
> index 656e065..b4b751c 100644
> --- a/qemu-progress.c
> +++ b/qemu-progress.c
> @@ -26,12 +26,15 @@
> #include "osdep.h"
> #include "sysemu.h"
> #include <stdio.h>
> +#include <signal.h>
>
> struct progress_state {
> int enabled;
> float current;
> float last_print;
> float min_skip;
> + void (*print)(void);
> + void (*end)(void);
> };
>
> static struct progress_state state;
> @@ -51,20 +54,60 @@ static void progress_simple_print(void)
>
> static void progress_simple_end(void)
> {
> - if (state.enabled) {
> - printf("\n");
> - }
> + printf("\n");
> +}
> +
> +static void progress_simple_init(void)
> +{
> + state.print = progress_simple_print;
> + state.end = progress_simple_end;
> +}
> +
> +#ifdef CONFIG_POSIX
> +static void sigusr_print(int signal)
> +{
> + printf(" (%3.2f/100%%)\n", state.current);
printf() is not async-signal-safe. I don't think you can safely call it
in a signal handler.
> +}
> +#endif
[...]
