improved logging

internal/fd.c

@@ -584,6 +584,37 @@ JSC_CCALL(fd_slurpwrite,
     return JS_NULL;
 )
 
+JSC_CCALL(fd_slurpappend,
+    size_t len;
+    const char *data = js_get_blob_data(js, &len, argv[1]);
+
+    if (!data && len > 0)
+        return JS_EXCEPTION;
+
+    const char *str = JS_ToCString(js, argv[0]);
+
+    if (!str) return JS_EXCEPTION;
+    int fd = open(str, O_WRONLY | O_CREAT | O_APPEND, 0644);
+    if (fd < 0) {
+      ret = JS_ThrowInternalError(js, "open failed for %s: %s", str, strerror(errno));
+      JS_FreeCString(js, str);
+      return ret;
+    }
+
+    ssize_t written = write(fd, data, len);
+    close(fd);
+
+    if (written != (ssize_t)len) {
+      ret = JS_ThrowInternalError(js, "write failed for %s: %s", str, strerror(errno));
+      JS_FreeCString(js, str);
+      return ret;
+    }
+
+    JS_FreeCString(js, str);
+
+    return JS_NULL;
+)
+
 // Helper function for recursive enumeration
 static void visit_directory(JSContext *js, JSValue *results, int *result_count, const char *curr_path, const char *rel_prefix, int recurse) {
     if (!curr_path) return;
@@ -733,6 +764,7 @@ static const JSCFunctionListEntry js_fd_funcs[] = {
     MIST_FUNC_DEF(fd, read, 2),
     MIST_FUNC_DEF(fd, slurp, 1),
     MIST_FUNC_DEF(fd, slurpwrite, 2),
+    MIST_FUNC_DEF(fd, slurpappend, 2),
     MIST_FUNC_DEF(fd, lseek, 3),
     MIST_FUNC_DEF(fd, getcwd, 0),
     MIST_FUNC_DEF(fd, rmdir, 2),