libc-bottom-half/cloudlibc/src/libc/sys/uio/pwritev.c

   1 // Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
   2 //
   3 // SPDX-License-Identifier: BSD-2-Clause
   4
   5 #include <sys/types.h>
   6 #include <sys/uio.h>
   7
   8 #include <wasi/core.h>
   9 #include <errno.h>
  10
  11 ssize_t pwritev(int fildes, const struct iovec *iov, int iovcnt, off_t offset) {
  12   if (iovcnt < 0 || offset < 0) {
  13     errno = EINVAL;
  14     return -1;
  15   }
  16   size_t bytes_written;
  17   __wasi_errno_t error = __wasi_fd_pwrite(
  18       fildes, (const __wasi_ciovec_t *)iov, iovcnt, offset, &bytes_written);
  19   if (error != 0) {
  20     errno = error;
  21     return -1;
  22   }
  23   return bytes_written;
  24 }