[PATCH v3 6/9] builtin/log.c: replace signal() with sigaction()

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 builtin/log.c

Signed-off-by: Jeremiah Mahler <redacted>
---
 builtin/log.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/builtin/log.c b/builtin/log.c
index 39e8836..f1deea1 100644
--- a/builtin/log.c
+++ b/builtin/log.c

@@ -315,7 +315,11 @@ static void setup_early_output(struct rev_info *rev)
 static void finish_early_output(struct rev_info *rev)
 {
 	int n = estimate_commit_count(rev, rev->commits);
-	signal(SIGALRM, SIG_IGN);
+	struct sigaction sa;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = SIG_IGN;
+	sigaction(SIGALRM, &sa, NULL);
 	show_early_header(rev, "done", n);
 }
 

-- 
2.0.0.8.g7bf6e1f.dirty