diff options
Diffstat (limited to 'src/os_unix.c')
| -rw-r--r-- | src/os_unix.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/os_unix.c b/src/os_unix.c index c5fa2c0ed..8ac272e5e 100644 --- a/src/os_unix.c +++ b/src/os_unix.c @@ -1000,10 +1000,14 @@ int sqlite3UnixIsDirWritable(char *zBuf){ */ static int seekAndRead(unixFile *id, void *pBuf, int cnt){ int got; + i64 newOffset; #ifdef USE_PREAD got = pread(id->h, pBuf, cnt, id->offset); #else - lseek(id->h, id->offset, SEEK_SET); + newOffset = lseek(id->h, id->offset, SEEK_SET); + if( newOffset!=id->offset ){ + return -1; + } got = read(id->h, pBuf, cnt); #endif if( got>0 ){ @@ -1043,10 +1047,14 @@ static int unixRead(OsFile *id, void *pBuf, int amt){ */ static int seekAndWrite(unixFile *id, const void *pBuf, int cnt){ int got; + i64 newOffset; #ifdef USE_PREAD got = pwrite(id->h, pBuf, cnt, id->offset); #else - lseek(id->h, id->offset, SEEK_SET); + newOffset = lseek(id->h, id->offset, SEEK_SET); + if( newOffset!=id->offset ){ + return -1; + } got = write(id->h, pBuf, cnt); #endif if( got>0 ){ |