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| author | Vito Caputo <vcaputo@pengaru.com> | 2020-11-09 14:45:57 -0800 |
|---|---|---|
| committer | Vito Caputo <vcaputo@pengaru.com> | 2020-11-09 14:45:57 -0800 |
| commit | cca2f79dfeb492926bd41619bd2ef931f77d00da (patch) | |
| tree | a6e6e7d29b11b05ea3884e6494a816228ba18b6d | |
| parent | 42904eef310313eeed6f8d91d5306488fd016d2e (diff) | |
load_cache: treat invalid frame header as EOF
In preparation for posix_fallocate() pre-allocation of cache
files, expect zeroes for the header when running off the end of
valid data into the only allocated space, and handle gracefully
as an EOF equivalent.
| -rw-r--r-- | src/rmd_load_cache.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/rmd_load_cache.c b/src/rmd_load_cache.c index 4ad1741..303cc3b 100644 --- a/src/rmd_load_cache.c +++ b/src/rmd_load_cache.c @@ -153,7 +153,10 @@ static int rmdReadFrame(CachedFrame *frame, CacheFile *icf) static int read_header(FrameHeader *fheader, CacheFile *icf) { - return rmdCacheFileRead(icf, fheader, sizeof(FrameHeader)) == sizeof(FrameHeader); + if (!(rmdCacheFileRead(icf, fheader, sizeof(FrameHeader)) == sizeof(FrameHeader))) + return 0; + + return !strncmp(fheader->frame_prefix, "FRAM", 4); } void *rmdLoadCache(ProgData *pdata) |