[PATCH 4/9] spaceman/defrag: ctrl-c handler

[Wengang Wang <wen.gang.wang@oracle.com>]

Add this handler to break the defrag better, so it has
1. the stats reporting
2. remove the temporary file

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
---
 spaceman/defrag.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/spaceman/defrag.c b/spaceman/defrag.c
index 9f11e36b..61e47a43 100644
--- a/spaceman/defrag.c
+++ b/spaceman/defrag.c
@@ -297,6 +297,13 @@ get_time_delta_us(struct timeval *pre_time, struct timeval *cur_time)
 	return us;
 }
 
+static volatile bool usedKilled = false;
+void defrag_sigint_handler(int dummy)
+{
+	usedKilled = true;
+	printf("Please wait until current segment is defragmented\n");
+};
+
 /*
  * defragment a file
  * return 0 if successfully done, 1 otherwise
@@ -345,6 +352,8 @@ defrag_xfs_defrag(char *file_path) {
 		goto out;
 	}
 
+	signal(SIGINT, defrag_sigint_handler);
+
 	do {
 		struct timeval t_clone, t_unshare, t_punch_hole;
 		struct defrag_segment segment;
@@ -434,7 +443,7 @@ defrag_xfs_defrag(char *file_path) {
 		if (time_delta > max_punch_us)
 			max_punch_us = time_delta;
 
-		if (stop)
+		if (stop || usedKilled)
 			break;
 	} while (true);
 out:
-- 
2.39.3 (Apple Git-146)