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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-08-28 11:56:34 +0930 |
|---|---|---|
| committer | Andrew Tridgell <tridge@samba.org> | 2009-08-28 13:43:05 +1000 |
| commit | 398d0c2929026fccb3409316720a4dcad225ab05 (patch) | |
| tree | a6f0afcf5b6bbc61f8adb5d841f003461068518e /lib/tdb/common/open.c | |
| parent | 4279879c9847ca069527e11ca934b8906009cad8 (diff) | |
| download | samba-398d0c2929026fccb3409316720a4dcad225ab05.tar.gz samba-398d0c2929026fccb3409316720a4dcad225ab05.tar.bz2 samba-398d0c2929026fccb3409316720a4dcad225ab05.zip | |
lib/tdb: don't overwrite TDBs with different version numbers.
In future, this may happen, and we don't want to clobber them.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'lib/tdb/common/open.c')
| -rw-r--r-- | lib/tdb/common/open.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/tdb/common/open.c b/lib/tdb/common/open.c index 2e6a707497..141e6fe517 100644 --- a/lib/tdb/common/open.c +++ b/lib/tdb/common/open.c @@ -240,17 +240,19 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, errno = 0; if (read(tdb->fd, &tdb->header, sizeof(tdb->header)) != sizeof(tdb->header) - || strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0 - || (tdb->header.version != TDB_VERSION - && !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION))))) { - /* its not a valid database - possibly initialise it */ + || strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0) { if (!(open_flags & O_CREAT) || tdb_new_database(tdb, hash_size) == -1) { if (errno == 0) { - errno = EIO; /* ie bad format or something */ + errno = EIO; /* ie bad format or something */ } goto fail; } rev = (tdb->flags & TDB_CONVERT); + } else if (tdb->header.version != TDB_VERSION + && !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION)))) { + /* wrong version */ + errno = EIO; + goto fail; } vp = (unsigned char *)&tdb->header.version; vertest = (((uint32_t)vp[0]) << 24) | (((uint32_t)vp[1]) << 16) | |