While we already have a wrapper around `git_fsync()`, this wrapper
doesn't handle looping around `EINTR`. Convert it to do so such that
callers don't have to remember doing this everywhere.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 wrapper.c      | 9 ++++++++-
 write-or-die.c | 6 ++----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/wrapper.c b/wrapper.c
index ece3d2ca10..e20df4f3a6 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -546,7 +546,7 @@ int xmkstemp_mode(char *filename_template, int mode)
 	return fd;
 }
 
-int git_fsync(int fd, enum fsync_action action)
+static int git_fsync_once(int fd, enum fsync_action action)
 {
 	switch (action) {
 	case FSYNC_WRITEOUT_ONLY:
@@ -591,7 +591,14 @@ int git_fsync(int fd, enum fsync_action action)
 	default:
 		BUG("unexpected git_fsync(%d) call", action);
 	}
+}
 
+int git_fsync(int fd, enum fsync_action action)
+{
+	while (git_fsync_once(fd, action) < 0)
+		if (errno != EINTR)
+			return -1;
+	return 0;
 }
 
 static int warn_if_unremovable(const char *op, const char *file, int rc)
diff --git a/write-or-die.c b/write-or-die.c
index cc8291d979..e61220aa2d 100644
--- a/write-or-die.c
+++ b/write-or-die.c
@@ -57,10 +57,8 @@ void fprintf_or_die(FILE *f, const char *fmt, ...)
 
 void fsync_or_die(int fd, const char *msg)
 {
-	while (git_fsync(fd, FSYNC_HARDWARE_FLUSH) < 0) {
-		if (errno != EINTR)
-			die_errno("fsync error on '%s'", msg);
-	}
+	if (git_fsync(fd, FSYNC_HARDWARE_FLUSH) < 0)
+		die_errno("fsync error on '%s'", msg);
 }
 
 void write_or_die(int fd, const void *buf, size_t count)
-- 
2.33.1