diff options
| author | Christoph Hellwig <hch@lst.de> | 2010-05-07 16:55:33 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-05-17 10:20:05 +0200 |
| commit | cd02a24b6112da50816a8021d97a2b26038f7190 (patch) | |
| tree | 107c3a1890f2333d63df662a9bd3cd11a26440b5 | |
| parent | dede4188cc817a039154ed2ecd7f3285f6b94056 (diff) | |
dmg: fix reading of uncompressed chunks
When dmg_read_chunk encounters an uncompressed chunk it currently
calls read without any previous adjustment of the file postion.
This seems very wrong, and the "reference" implementation in
dmg2img does a search to the same offset as done in the various
compression cases, so do the same here.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/dmg.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/dmg.c b/block/dmg.c index d5c1a687e4..02a3d67206 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -239,7 +239,8 @@ static inline int dmg_read_chunk(BDRVDMGState *s,int sector_num) return -1; break; } case 1: /* copy */ - ret = read(s->fd, s->uncompressed_chunk, s->lengths[chunk]); + ret = pread(s->fd, s->uncompressed_chunk, s->lengths[chunk], + s->offsets[chunk]); if (ret != s->lengths[chunk]) return -1; break; |