[PATCH 1/5] progress.c: replace signal() with sigaction()

[Jeremiah Mahler <jmmahler@gmail.com>]

From signal(2)

  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.  See Portability below.

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

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

diff --git a/progress.c b/progress.c
index 261314e..24df263 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;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = SIG_IGN;
 	setitimer(ITIMER_REAL, &v, NULL);
-	signal(SIGALRM, SIG_IGN);
+	sigaction(SIGALRM, &sa, 0);
 	progress_update = 0;
 }
 
-- 
2.0.0.rc4.6.g127602c