rc: sort rc files

progs/rc/src/rc.c

@@ -42,21 +42,40 @@ static int rc_load_dir(const char *path, const char *action) {
         return -1;
     }
     struct dirent *ent;
-    char script[256];
+    char *filenames = malloc(512 * 16);
+    char *filename;
+    size_t fcap = 16;
+    size_t fcnt = 0;
+
 
-    // TODO: readdir doesn't guarantee ordering
     while ((ent = readdir(dir))) {
         if (ent->d_name[0] == '.') {
             continue;
         }
 
-        snprintf(script, sizeof(script), "%s/%s", path, ent->d_name);
-
-        rc_script_exec(script, "start");
+        if (fcnt == fcap) {
+            fcap += 16;
+            filenames = realloc(filenames, 512 * fcap);
+            if (!filenames) {
+                warn("realloc()");
+                return -1;
+            }
+        }
+        filename = &filenames[512 * fcnt];
+        snprintf(filename, 512, "%s/%s", path, ent->d_name);
+        ++fcnt;
     }
-
     closedir(dir);
 
+    qsort(filenames, fcnt, 512, (int (*) (const void *, const void *)) strcmp);
+
+    for (size_t i = 0; i < fcnt; ++i) {
+        filename = &filenames[i * 512];
+        if (rc_script_exec(filename, "start") != 0) {
+            warn("rc_script_exec(%s)", filename);
+        }
+    }
+
     return 0;
 }