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
readlinkat(int fd,const char * restrict path,char * restrict buf,size_t bufsize)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 buf, bufsize, &bufused);
18 #else
19 // TODO: Remove the cast on `buf` once the witx is updated with char8 support.
20 __wasi_errno_t error = __wasi_path_readlink(fd, path, strlen(path),
21 (uint8_t*)buf, bufsize, &bufused);
22 #endif
23 if (error != 0) {
24 errno = errno_fixup_directory(fd, error);
25 return -1;
26 }
27 return bufused;
28 }
29