[PATCH v3 3/9] progress.c: replace signal() with sigaction()

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>From the signal(2) man page:

  The behavior of signal() varies across UNIX versions, and has also var‐
  ied historically across different versions of Linux.   Avoid  its  use:
  use sigaction(2) instead.

Replaced signal() with sigaction() in progress.c

Signed-off-by: Jeremiah Mahler <jmmahler@xxxxxxxxx>
---
 progress.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/progress.c b/progress.c
index 261314e..ff676bc 100644
--- a/progress.c
+++ b/progress.c
@@ -66,8 +66,12 @@ static void set_progress_signal(void)
 static void clear_progress_signal(void)
 {
 	struct itimerval v = {{0,},};
+	struct sigaction sa;
+
 	setitimer(ITIMER_REAL, &v, NULL);
-	signal(SIGALRM, SIG_IGN);
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = SIG_IGN;
+	sigaction(SIGALRM, &sa, NULL);
 	progress_update = 0;
 }
 
-- 
2.0.0.8.g7bf6e1f.dirty

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