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qemu-progress.c: printf isn't signal safe

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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.Sorensen@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jes Sorensen 2011-04-28 13:58:30 +02:00 committed by Kevin Wolf
parent ab71982716
commit 2ab3cb8c0a
1 changed files with 6 additions and 1 deletions
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7
qemu-progress.c
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@ -37,6 +37,7 @@ struct progress_state {
}; };
static struct progress_state state; static struct progress_state state;
static volatile sig_atomic_t print_pending;
/* /*
* Simple progress print function. * Simple progress print function.
@ -63,12 +64,16 @@ static void progress_simple_init(void)
#ifdef CONFIG_POSIX #ifdef CONFIG_POSIX
static void sigusr_print(int signal) static void sigusr_print(int signal)
{ {
printf(" (%3.2f/100%%)\n", state.current); print_pending = 1;
} }
#endif #endif
static void progress_dummy_print(void) static void progress_dummy_print(void)
{ {
if (print_pending) {
fprintf(stderr, " (%3.2f/100%%)\n", state.current);
print_pending = 0;
}
} }
static void progress_dummy_end(void) static void progress_dummy_end(void)