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

   1 // Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
   2 //
   3 // SPDX-License-Identifier: BSD-2-Clause
   4
   5 #include <common/errno.h>
   6
   7 #include <wasi/api.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11
  12 ssize_t __wasilibc_nocwd_readlinkat(int fd, const char *restrict path, char *restrict buf,
  13                                     size_t bufsize) {
  14   size_t bufused;
  15   // TODO: Remove the cast on `buf` once the witx is updated with char8 support.
  16   __wasi_errno_t error = __wasi_path_readlink(fd, path,
  17                                                       (uint8_t*)buf, bufsize, &bufused);
  18   if (error != 0) {
  19     errno = errno_fixup_directory(fd, error);
  20     return -1;
  21   }
  22   return bufused;
  23 }