55    /* try a few times to come up with a new backup file, then give up */
At conditional (3): "i < 10" taking the true branch.
 56    for (i = 0; i < 10; i++) {
At conditional (4): "i == 0" taking the false branch.
 57        if (i == 0) {
 58            dst_file = talloc_asprintf(tmp_ctx, "%s.bak", src_file);
 59        } else {
 60            dst_file = talloc_asprintf(tmp_ctx, "%s.bak%d", src_file, i);
 61        }
At conditional (5): "!dst_file" taking the false branch.
 62        if (!dst_file) {
 63            ret = ENOMEM;
 64            goto done;
 65        }
 66
 67        errno = 0;
CID 11083: Resource leak (RESOURCE_LEAK)Calling opening function "open".
Assigning: "dst_fd" = handle returned from "open(dst_file, 193, 384)".
Overwriting handle "dst_fd" in call "dst_fd = open(dst_file, 193, 384)" leaks the handle.
 68        dst_fd = open(dst_file, O_CREAT|O_EXCL|O_WRONLY, 0600);
 69        ret = errno;
 70
At conditional (1): "dst_fd > 0" taking the false branch.
Testing whether handle "dst_fd" is strictly greater than zero is suspicious. Did you intend to include equality with zero? "dst_fd" leaks when it is zero.
 71        if (dst_fd > 0) break;
 72
At conditional (2): "ret != 17" taking the false branch.
 73        if (ret != EEXIST) {
 74            DEBUG(dbglvl, ("Error (%d [%s]) opening destination file %s\n",
 75                           ret, strerror(ret), dst_file));
 76            goto done;
 77        }
 78    }