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/core.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11
  12 ssize_t readlinkat(int fd, const char *restrict path, char *restrict buf,
  13                    size_t bufsize) {
  14   size_t bufused;
  15 #ifdef __wasilibc_unmodified_upstream
  16   __wasi_errno_t error = __wasi_file_readlink(fd, path, strlen(path),
  17 #else
  18   __wasi_errno_t error = __wasi_path_readlink(fd, path, strlen(path),
  19 #endif
  20                                                       buf, bufsize, &bufused);
  21   if (error != 0) {
  22     errno = errno_fixup_directory(fd, error);
  23     return -1;
  24   }
  25   return bufused;
  26 }