[PATCH] stream_to_pack: xread does not guarantee to read all requested bytes

[Johannes Sixt <j6t@kdbg.org>]

The deflate loop in bulk-checkin::stream_to_pack expects to get all bytes
from a file that it requests to read in a single function call. But it
used xread(), which does not give that guarantee. Replace it by
read_in_full().

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
---
 The size is limited to sizeof(ibuf) == 16384 bytes, so that there
 should not be a problem with the unpatched code on any OS in practice.
 Nevertheless, this change seems reasonable from a code hygiene POV.

 bulk-checkin.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bulk-checkin.c b/bulk-checkin.c
index 6b0b6d4..118c625 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -114,7 +114,7 @@ static int stream_to_pack(struct bulk_checkin_state *state,
 
 		if (size && !s.avail_in) {
 			ssize_t rsize = size < sizeof(ibuf) ? size : sizeof(ibuf);
-			if (xread(fd, ibuf, rsize) != rsize)
+			if (read_in_full(fd, ibuf, rsize) != rsize)
 				die("failed to read %d bytes from '%s'",
 				    (int)rsize, path);
 			offset += rsize;
-- 
1.8.4.rc3.1241.gcbfd92d.dirty