add: weekly schedules support

helpers/get_day_of_week.c

@@ -0,0 +1,12 @@
+#include <time.h>
+
+#include <helpers.h>
+
+int
+helper_get_weekday(const time_t timestamp_now)
+{
+    struct tm *now = localtime(&timestamp_now);
+    int wday_sun_sat = now->tm_wday;
+    int wday_mon_sun = (wday_sun_sat + 6) % 7;
+    return wday_mon_sun;
+}

helpers/parse_cli.c

@@ -18,7 +18,7 @@ static const char *const usage[] = {
 #define PERM_EXEC  (1<<2)
 
 void
-helpers_parse_cli(int argc, const char **argv, config_t *config)
+helper_parse_cli(int argc, const char **argv, config_t *config)
 {
     struct argparse_option options[] =
     {