diff options
Diffstat (limited to 'tools/xenstore/tdb.c')
-rw-r--r-- | tools/xenstore/tdb.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/xenstore/tdb.c b/tools/xenstore/tdb.c index 63205e1042..3ecd3fc648 100644 --- a/tools/xenstore/tdb.c +++ b/tools/xenstore/tdb.c @@ -2103,6 +2103,41 @@ TDB_CONTEXT *tdb_copy(TDB_CONTEXT *tdb, const char *outfile) int fd, saved_errno; TDB_CONTEXT *copy; + if (tdb->flags & TDB_INTERNAL) { + struct tdb_header *copydb; + + copy = talloc_zero(outfile, TDB_CONTEXT); + if (copy == NULL) { + errno = ENOMEM; + goto intfail; + } + memcpy(copy, tdb, sizeof(TDB_CONTEXT)); + + if (copy->name || copy->locked || copy->device || copy->inode) { + fprintf(stderr, "tdb_copy assumption(s) failed\n"); + goto intfail; + } + + copydb = talloc_zero_size(copy, copy->map_size); + if (copydb == NULL) { + errno = ENOMEM; + goto intfail; + } + memcpy(copydb, copy->map_ptr, copy->map_size); + copy->map_ptr = (char*) copydb; + + if (tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0) == -1) + goto intfail; + + copy->next = tdbs; + tdbs = copy; + + return copy; +intfail: + talloc_free(copy); + return NULL; + } + fd = open(outfile, O_TRUNC|O_CREAT|O_WRONLY, 0640); if (fd < 0) return NULL; |