dirOpenDirWasi

fn dirOpenDirWasi(
    userdata: ?*anyopaque,
    dir: Dir,
    sub_path: []const u8,
    options: Dir.OpenOptions,
) Dir.OpenError!Dir

File

Code

fn dirOpenDirWasi(
    userdata: ?*anyopaque,
    dir: Dir,
    sub_path: []const u8,
    options: Dir.OpenOptions,
) Dir.OpenError!Dir {
    if (builtin.link_libc) return dirOpenDirPosix(userdata, dir, sub_path, options);
    const t: *Threaded = @ptrCast(@alignCast(userdata));
    _ = t;
    const wasi = std.os.wasi;

    var base: std.os.wasi.rights_t = .{
        .FD_FILESTAT_GET = true,
        .FD_FDSTAT_SET_FLAGS = true,
        .FD_FILESTAT_SET_TIMES = true,
    };
    if (options.access_sub_paths) {
        base.FD_READDIR = true;
        base.PATH_CREATE_DIRECTORY = true;
        base.PATH_CREATE_FILE = true;
        base.PATH_LINK_SOURCE = true;
        base.PATH_LINK_TARGET = true;
        base.PATH_OPEN = true;
        base.PATH_READLINK = true;
        base.PATH_RENAME_SOURCE = true;
        base.PATH_RENAME_TARGET = true;
        base.PATH_FILESTAT_GET = true;
        base.PATH_FILESTAT_SET_SIZE = true;
        base.PATH_FILESTAT_SET_TIMES = true;
        base.PATH_SYMLINK = true;
        base.PATH_REMOVE_DIRECTORY = true;
        base.PATH_UNLINK_FILE = true;
    }

    const lookup_flags: wasi.lookupflags_t = .{ .SYMLINK_FOLLOW = options.follow_symlinks };
    const oflags: wasi.oflags_t = .{ .DIRECTORY = true };
    const fdflags: wasi.fdflags_t = .{};
    var fd: posix.fd_t = undefined;
    const syscall: Syscall = try .start();
    while (true) {
        switch (wasi.path_open(dir.handle, lookup_flags, sub_path.ptr, sub_path.len, oflags, base, base, fdflags, &fd)) {
            .SUCCESS => {
                syscall.finish();
                return .{ .handle = fd };
            },
            .INTR => {
                try syscall.checkCancel();
                continue;
            },
            else => |e| {
                syscall.finish();
                switch (e) {
                    .FAULT => |err| return errnoBug(err),
                    .INVAL => return error.BadPathName,
                    .BADF => |err| return errnoBug(err), // File descriptor used after closed.
                    .ACCES => return error.AccessDenied,
                    .LOOP => return error.SymLinkLoop,
                    .MFILE => return error.ProcessFdQuotaExceeded,
                    .NAMETOOLONG => return error.NameTooLong,
                    .NFILE => return error.SystemFdQuotaExceeded,
                    .NODEV => return error.NoDevice,
                    .NOENT => return error.FileNotFound,
                    .NOMEM => return error.SystemResources,
                    .NOTDIR => return error.NotDir,
                    .PERM => return error.PermissionDenied,
                    .NOTCAPABLE => return error.AccessDenied,
                    .ILSEQ => return error.BadPathName,
                    else => |err| return posix.unexpectedErrno(err),
                }
            },
        }
    }
}