libc-bottom-half/cloudlibc/src/libc/unistd/read.c

   1 // Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
   2 //
   3 // SPDX-License-Identifier: BSD-2-Clause
   4
   5 #include <wasi/api.h>
   6 #include <errno.h>
   7 #include <unistd.h>
   8
   9 ssize_t read(int fildes, void *buf, size_t nbyte) {
  10   __wasi_iovec_t iov = {.buf = buf, .buf_len = nbyte};
  11   size_t bytes_read;
  12   __wasi_errno_t error = __wasi_fd_read(fildes, &iov, 1, &bytes_read);
  13   if (error != 0) {
  14     errno = error == ENOTCAPABLE ? EBADF : error;
  15     return -1;
  16   }
  17   return bytes_read;
  18 }