1 files changed, 22 insertions, 0 deletions
diff --git a/libc-bottom-half/cloudlibc/src/libc/unistd/ftruncate.c b/libc-bottom-half/cloudlibc/src/libc/unistd/ftruncate.c
new file mode 100644
index 0000000..7792597
--- /dev/null
+++ b/libc-bottom-half/cloudlibc/src/libc/unistd/ftruncate.c
@@ -0,0 +1,22 @@
+// Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
+//
+// SPDX-License-Identifier: BSD-2-Clause
+
+#include <wasi/api.h>
+#include <errno.h>
+#include <unistd.h>
+
+int ftruncate(int fildes, off_t length) {
+  if (length < 0) {
+    errno = EINVAL;
+    return -1;
+  }
+  __wasi_filesize_t st_size = length;
+  __wasi_errno_t error =
+      __wasi_fd_filestat_set_size(fildes, st_size);
+  if (error != 0) {
+    errno = error;
+    return -1;
+  }
+  return 0;
+}