1 files changed, 21 insertions, 0 deletions
diff --git a/libc-bottom-half/sources/truncate.c b/libc-bottom-half/sources/truncate.c
new file mode 100644
index 0000000..24ae28f
--- /dev/null
+++ b/libc-bottom-half/sources/truncate.c
@@ -0,0 +1,21 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <wasi/libc.h>
+
+int truncate(const char *path, off_t length)
+{
+    int fd = __wasilibc_open_nomode(path, O_WRONLY | O_CLOEXEC | O_NOCTTY);
+    if (fd < 0)
+        return -1;
+
+    int result = ftruncate(fd, length);
+    if (result != 0) {
+        int save_errno = errno;
+        (void)close(fd);
+        errno = save_errno;
+        return -1;
+    }
+
+    return close(fd);
+}