Implement --checksum.

[dss.git] / dss.c

diff --git a/dss.c b/dss.c
index 6f0d759db4a71084f04967f7f32aa65ea68dd394..3e626ab0113b1890277da115ea6c735dbdb690d7 100644 (file)
--- a/dss.c
+++ b/dss.c
@@ -1055,9 +1055,15 @@ static int handle_sigchld(void)
 
 static int change_to_dest_dir(void)
 {
+       int ret;
        const char *dd = OPT_STRING_VAL(DSS, DEST_DIR);
+
        DSS_INFO_LOG(("changing cwd to %s\n", dd));
-       return dss_chdir(dd);
+       if (chdir(dd) >= 0)
+               return 1;
+       ret = -ERRNO_TO_DSS_ERROR(errno);
+       DSS_ERROR_LOG(("could not change cwd to %s\n", dd));
+       return ret;
 }
 
 static int check_config(const struct lls_command *cmd)
@@ -1341,6 +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);
@@ -1351,6 +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)));
@@ -1511,11 +1526,20 @@ static void lock_dss_or_die(void)
 static int com_run(void)
 {
        int ret, fd = -1;
+       char *config_file;
+       pid_t pid;
 
        if (OPT_GIVEN(DSS, DRY_RUN)) {
                DSS_ERROR_LOG(("dry run not supported by this command\n"));
                return -E_SYNTAX;
        }
+       config_file = get_config_file_name();
+       ret = get_dss_pid(config_file, &pid);
+       free(config_file);
+       if (ret >= 0) {
+               DSS_ERROR_LOG(("pid %d\n", (int)pid));
+               return -E_ALREADY_RUNNING;
+       }
        if (OPT_GIVEN(RUN, DAEMON)) {
                fd = daemon_init();
                daemonized = true;