Added Tor

ports/glibc-compat/src/writev.c

Index: ports/glibc-compat/src/writev.c
diff --git a/ports/glibc-compat/src/writev.c b/ports/glibc-compat/src/writev.c
new file mode 100644
index 0000000000000000000000000000000000000000..385802ee1acb21313e30cc1f0553c43d752775af
--- /dev/null
+++ b/ports/glibc-compat/src/writev.c
@@ -0,0 +1,29 @@
+/* Copyright 2015 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+

[Sam Clegg, 2015/08/25 18:25:30]

Have you don't a sync recently?  I think these functions were already added a
few weeks ago in this change:
https://codereview.chromium.org/1260083004

+#include <sys/uio.h>
+#include <unistd.h> // unix(nacl) standards
+#include <errno.h>
+
+ssize_t writev (int fd,const struct iovec *iov,int iovcnt) {
+  if (iovcnt < 0) {
+    // #TODO(dt) add check for IOV_MAX
+    errno = EINVAL;
+    return -1;
+  }
+  ssize_t bytes_written = 0;
+  ssize_t bytes_supposed_to_be_written = 0;
+  int i;
+  for (i = 0; i < (iovcnt); i++) {
+    bytes_written += write(fd, iov[i].iov_base, iov[i].iov_len);
+    bytes_supposed_to_be_written += iov[i].iov_len;
+    //#TODO(dt) add check for (max) ssize_t allowed
+    if (bytes_written != bytes_supposed_to_be_written) {
+      // deliberately not setting errno here as it might override
+      // errno set by write(...)
+      return -1;
+    }
+  }
+  return bytes_written;
+}