Continue work on DST framework

src/main_server.c

@@ -0,0 +1,62 @@
+#ifdef BUILD_SERVER
+
+#include <string.h>
+
+#include "core/chunk_server.h"
+#include "core/metadata_server.h"
+
+int metadata_server_main(int argc, char **argv)
+{
+    void *contexts[MAX_CONNS+1];
+    struct pollfd polled[MAX_CONNS+1];
+    int num_polled;
+    MetadataServer state;
+    num_polled = metadata_server_init(
+        &state, argc, argv, contexts, polled);
+    if (num_polled < 0) return -1;
+    for (;;) {
+        POLL(polled, num_polled, -1);
+        num_polled = metadata_server_step(
+            &state, contexts, polled, num_polled);
+        if (num_polled < 0) return -1;
+    }
+    metadata_server_free(&state);
+    return 0;
+}
+
+int chunk_server_main(int argc, char **argv)
+{
+    void *contexts[MAX_CONNS+1];
+    struct pollfd polled[MAX_CONNS+1];
+    int num_polled;
+    ChunkServer state;
+    num_polled = chunk_server_init(
+        &state, argc, argv, contexts, polled);
+    if (num_polled < 0) return -1;
+    for (;;) {
+        POLL(polled, num_polled, -1);
+        num_polled = chunk_server_step(
+            &state, contexts, polled, num_polled);
+        if (num_polled < 0) return -1;
+    }
+    chunk_server_free(&state);
+    return 0;
+}
+
+bool is_leader(int argc, char **argv)
+{
+    for (int i = 1; i < argc; i++)
+        if (!strcmp(argv[i], "--leader") || !strcmp(argv[i], "-l"))
+            return true;
+    return false;
+}
+
+int main(int argc, char **argv)
+{
+    if (is_leader(argc, argv))
+        return metadata_server_main(argc, argv);
+    else
+        return chunk_server_main(argc, argv);
+}
+
+#endif