Introduce --no-resume.

[dss.git] / dss.c

diff --git a/dss.c b/dss.c
index 93ab802cb123bddde776042a9a9cff266102091c..eae8b3ed0f2ea112a54c3d6356329c9f6e768441 100644 (file)
--- a/dss.c
+++ b/dss.c
@@ -966,6 +966,32 @@ static int use_rsync_locally(char *logname)
        return 1;
 }
 
+static int rename_resume_snap(int64_t creation_time)
+{
+       struct snapshot_list sl = {.num_snapshots = 0};
+       struct snapshot *s;
+       char *new_name = incomplete_name(creation_time);
+       int ret;
+
+       ret = 0;
+       if (conf.no_resume_given)
+               goto out;
+       dss_get_snapshot_list(&sl);
+       s = get_newest_snapshot(&sl);
+       if (!s)
+               goto out;
+       if ((s->flags & SS_COMPLETE) != 0) /* complete */
+               goto out;
+       DSS_INFO_LOG("resuming: reusing %s as destination dir\n", s->name);
+       ret = dss_rename(s->name, new_name);
+out:
+       if (ret >= 0)
+               DSS_NOTICE_LOG("creating new snapshot %s\n", new_name);
+       free(new_name);
+       free_snapshot_list(&sl);
+       return ret;
+}
+
 static void create_rsync_argv(char ***argv, int64_t *num)
 {
        char *logname;
@@ -1018,11 +1044,10 @@ static void free_rsync_argv(char **argv)
 static int create_snapshot(char **argv)
 {
        int ret, fds[3] = {0, 0, 0};
-       char *name;
 
-       name = incomplete_name(current_snapshot_creation_time);
-       DSS_NOTICE_LOG("creating new snapshot %s\n", name);
-       free(name);
+       ret = rename_resume_snap(current_snapshot_creation_time);
+       if (ret < 0)
+               return ret;
        ret = dss_exec(&create_pid, argv[0], argv, fds);
        if (ret < 0)
                return ret;