X-Git-Url: http://git.tuebingen.mpg.de/?p=dss.git;a=blobdiff_plain;f=dss.c;h=3e626ab0113b1890277da115ea6c735dbdb690d7;hp=5e2ef46f71251c6a157f2f9df02900c8e534a3a9;hb=2af5575f983be85475a72882a261731e99098b02;hpb=2d10a72798da5489363088dfbe02ccbc5942cfcd

diff --git a/dss.c b/dss.c
index 5e2ef46..3e626ab 100644
--- a/dss.c
+++ b/dss.c
@@ -1347,6 +1347,7 @@ static void create_rsync_argv(char ***argv, int64_t *num)
 	char *logname;
 	int i = 0, j, N = OPT_GIVEN(DSS, RSYNC_OPTION);
 	struct snapshot_list sl;
+	static bool seeded;
 
 	dss_get_snapshot_list(&sl);
 	assert(!name_of_reference_snapshot);
@@ -1357,6 +1358,14 @@ static void create_rsync_argv(char ***argv, int64_t *num)
 	(*argv)[i++] = dss_strdup("rsync");
 	(*argv)[i++] = dss_strdup("-a");
 	(*argv)[i++] = dss_strdup("--delete");
+	if (!seeded) {
+		srandom((unsigned)time(NULL)); /* no need to be fancy here */
+		seeded = true;
+	}
+	if (1000 * (random() / (RAND_MAX + 1.0)) < OPT_UINT32_VAL(DSS, CHECKSUM)) {
+		DSS_NOTICE_LOG(("adding --checksum to rsync options\n"));
+		(*argv)[i++] = dss_strdup("--checksum");
+	}
 	for (j = 0; j < N; j++)
 		(*argv)[i++] = dss_strdup(lls_string_val(j,
 			OPT_RESULT(DSS, RSYNC_OPTION)));