dirCreateFileWasi

fn dirCreateFileWasi(
    userdata: ?*anyopaque,
    dir: Dir,
    sub_path: []const u8,
    flags: Dir.CreateFileOptions,
) File.OpenError!File

File

Code

fn dirCreateFileWasi(
    userdata: ?*anyopaque,
    dir: Dir,
    sub_path: []const u8,
    flags: Dir.CreateFileOptions,
) File.OpenError!File {
    const t: *Threaded = @ptrCast(@alignCast(userdata));
    _ = t;
    const wasi = std.os.wasi;
    const lookup_flags: wasi.lookupflags_t = .{};
    const oflags: wasi.oflags_t = .{
        .CREAT = true,
        .TRUNC = flags.truncate,
        .EXCL = flags.exclusive,
    };
    const fdflags: wasi.fdflags_t = .{};
    const base: wasi.rights_t = .{
        .FD_READ = flags.read,
        .FD_WRITE = true,
        .FD_DATASYNC = true,
        .FD_SEEK = true,
        .FD_TELL = true,
        .FD_FDSTAT_SET_FLAGS = true,
        .FD_SYNC = true,
        .FD_ALLOCATE = true,
        .FD_ADVISE = true,
        .FD_FILESTAT_SET_TIMES = true,
        .FD_FILESTAT_SET_SIZE = true,
        .FD_FILESTAT_GET = true,
        // POLL_FD_READWRITE only grants extra rights if the corresponding FD_READ and/or
        // FD_WRITE is also set.
        .POLL_FD_READWRITE = true,
    };
    const inheriting: wasi.rights_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, inheriting, fdflags, &fd)) {
            .SUCCESS => {
                syscall.finish();
                return .{
                    .handle = fd,
                    .flags = .{ .nonblocking = false },
                };
            },
            .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,
                    .FBIG => return error.FileTooBig,
                    .OVERFLOW => return error.FileTooBig,
                    .ISDIR => return error.IsDir,
                    .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,
                    .NOSPC => return error.NoSpaceLeft,
                    .NOTDIR => return error.NotDir,
                    .PERM => return error.PermissionDenied,
                    .EXIST => return error.PathAlreadyExists,
                    .BUSY => return error.DeviceBusy,
                    .NOTCAPABLE => return error.AccessDenied,
                    .ILSEQ => return error.BadPathName,
                    else => |err| return posix.unexpectedErrno(err),
                }
            },
        }
    }
}