Function readlinkatWasi [src]
Prototype
pub fn readlinkatWasi(dirfd: fd_t, file_path: []const u8, out_buffer: []u8) ReadLinkError![]u8 Parameters
dirfd: fd_tfile_path: []const u8out_buffer: []u8 Possible Errors
In WASI, this error may occur when the file descriptor does not hold the required rights to read value of a symbolic link relative to it.
WASI-only; file paths must be valid UTF-8.
Windows-only; file paths provided by the user must be valid WTF-8. https://simonsapin.github.io/wtf-8/
On Windows, \\server or \\server\share was not found.
The Operating System returned an undocumented error code.
This error is in theory not possible, but it would be better to handle this error than to invoke undefined behavior.
When this error code is observed, it usually means the Zig Standard Library needs a small patch to add the error code to the error set for the respective function.
Windows-only. This error may occur if the opened reparse point is of unsupported type.
Source
pub fn readlinkatWasi(dirfd: fd_t, file_path: []const u8, out_buffer: []u8) ReadLinkError![]u8 {
var bufused: usize = undefined;
switch (wasi.path_readlink(dirfd, file_path.ptr, file_path.len, out_buffer.ptr, out_buffer.len, &bufused)) {
.SUCCESS => return out_buffer[0..bufused],
.ACCES => return error.AccessDenied,
.FAULT => unreachable,
.INVAL => return error.NotLink,
.IO => return error.FileSystem,
.LOOP => return error.SymLinkLoop,
.NAMETOOLONG => return error.NameTooLong,
.NOENT => return error.FileNotFound,
.NOMEM => return error.SystemResources,
.NOTDIR => return error.NotDir,
.NOTCAPABLE => return error.AccessDenied,
.ILSEQ => return error.InvalidUtf8,
else => |err| return unexpectedErrno(err),
}
}