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ITS#7886 fix mdb_copy write size

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Don't try to write past end of file
This commit is contained in:
Howard Chu 2014-06-30 04:41:50 -07:00
parent 91d8ad1d3c
commit b09e46904c
1 changed files with 17 additions and 1 deletions
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18
libraries/liblmdb/mdb.c
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@ -4505,7 +4505,23 @@ mdb_env_copyfd(MDB_env *env, HANDLE fd)
if (rc)
goto leave;
wsize = txn->mt_next_pgno * env->me_psize - wsize;
w2 = txn->mt_next_pgno * env->me_psize;
#ifdef WIN32
{
LARGE_INTEGER fsize;
GetFileSizeEx(env->me_fd, &fsize);
if (w2 > fsize.QuadPart)
w2 = fsize.QuadPart;
}
#else
{
struct stat st;
fstat(env->me_fd, &st);
if (w2 > (size_t)st.st_size)
w2 = st.st_size;
}
#endif
wsize = w2 - wsize;
while (wsize > 0) {
if (wsize > MAX_WRITE)
w2 = MAX_WRITE;