Some more Tk fun. (0.37.18)

src/vm/os/list_dir.c

@@ -0,0 +1,49 @@
+/**
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-12-23
+ */
+
+case OP_OS_LIST_DIR: {
+    /* pops path string; pushes array of strings */
+    Value pathv = pop_value(vm);
+    char *path = value_to_string_alloc(&pathv);
+    free_value(pathv);
+
+    Value arr = make_array_from_values(NULL, 0);
+    if (path) {
+        /* 
+         * Using 'ls -1' as a fallback to avoid dirent.h conflicts on some systems.
+         * We escape the path minimally for the shell. 
+         */
+        size_t slen = strlen(path) + 16;
+        char *cmd = (char*)malloc(slen);
+        if (cmd) {
+            snprintf(cmd, slen, "ls -1 \"%s\"", path);
+            FILE *fp = popen(cmd, "r");
+            if (fp) {
+                char line[1024];
+                while (fgets(line, sizeof(line), fp)) {
+                    /* Strip trailing newline */
+                    size_t l = strlen(line);
+                    if (l > 0 && line[l-1] == '\n') line[l-1] = '\0';
+                    if (l > 1 && line[l-2] == '\r') line[l-2] = '\0';
+                    
+                    if (line[0] != '\0') {
+                        array_push(&arr, make_string(line));
+                    }
+                }
+                pclose(fp);
+            }
+            free(cmd);
+        }
+        free(path);
+    }
+    push_value(vm, arr);
+    break;
+}