Detect short reads - dedup - deduplicating backup program
HTML git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/
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---
DIR commit f08d3792bd0dc9154b8a0e09b339d9d80845b71f
DIR parent d0cf858ff772267664f2286a69e133972f00520d
HTML Author: sin <sin@2f30.org>
Date: Thu, 7 Mar 2019 17:17:51 +0000
Detect short reads
This can happen if the store is truncated.
Diffstat:
M dedup.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
---
DIR diff --git a/dedup.c b/dedup.c
@@ -211,9 +211,14 @@ hash_blk(uint8_t *buf, size_t size, uint8_t *md)
static void
read_blk(uint8_t *buf, struct blk_desc *blk_desc)
{
+ ssize_t n;
+
xlseek(sfd, blk_desc->offset, SEEK_SET);
- if (xread(sfd, buf, blk_desc->size) == 0)
- errx(1, "read: unexpected EOF");
+ n = xread(sfd, buf, blk_desc->size);
+ if (n == 0)
+ errx(1, "read_blk: unexpected EOF");
+ if (n != blk_desc->size)
+ errx(1, "read_blk: short read");
}
static void