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std.Io.Threaded: implement dirOpenDir
This commit is contained in:
Andrew Kelley
parent
dc6a4f3bf1
commit
62c0496d0a
2 changed files with 103 additions and 110 deletions
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@ -208,6 +208,7 @@ pub fn io(t: *Threaded) Io {
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.dirOpenDir = switch (builtin.os.tag) {
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.windows => dirOpenDirWindows,
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.wasi => dirOpenDirWasi,
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.haiku => dirOpenDirHaiku,
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else => dirOpenDirPosix,
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},
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.dirClose = dirClose,
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@ -1784,22 +1785,20 @@ fn dirOpenFilePosix(
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if (@hasField(posix.O, "NOCTTY")) os_flags.NOCTTY = !flags.allow_ctty;
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// Use the O locking flags if the os supports them to acquire the lock
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// atomically.
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if (have_flock_open_flags) {
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// Note that the NONBLOCK flag is removed after the openat() call
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// is successful.
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switch (flags.lock) {
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.none => {},
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.shared => {
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os_flags.SHLOCK = true;
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os_flags.NONBLOCK = flags.lock_nonblocking;
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},
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.exclusive => {
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os_flags.EXLOCK = true;
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os_flags.NONBLOCK = flags.lock_nonblocking;
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},
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}
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}
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// atomically. Note that the NONBLOCK flag is removed after the openat()
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// call is successful.
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if (have_flock_open_flags) switch (flags.lock) {
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.none => {},
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.shared => {
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os_flags.SHLOCK = true;
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os_flags.NONBLOCK = flags.lock_nonblocking;
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},
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.exclusive => {
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os_flags.EXLOCK = true;
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os_flags.NONBLOCK = flags.lock_nonblocking;
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},
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};
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const fd: posix.fd_t = while (true) {
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try t.checkCancel();
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const rc = openat_sym(dir.handle, sub_path_posix, os_flags, @as(posix.mode_t, 0));
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@ -2008,11 +2007,92 @@ fn dirOpenDirPosix(
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) Io.Dir.OpenError!Io.Dir {
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const t: *Threaded = @ptrCast(@alignCast(userdata));
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_ = t;
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_ = dir;
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_ = sub_path;
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var path_buffer: [posix.PATH_MAX]u8 = undefined;
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const sub_path_posix = try pathToPosix(sub_path, &path_buffer);
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var flags: posix.O = switch (native_os) {
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.wasi => .{
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.read = true,
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.NOFOLLOW = !options.follow_symlinks,
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.DIRECTORY = true,
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},
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else => .{
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.ACCMODE = .RDONLY,
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.NOFOLLOW = !options.follow_symlinks,
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.DIRECTORY = true,
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.CLOEXEC = true,
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},
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};
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if (@hasField(posix.O, "PATH") and !options.iterate)
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flags.PATH = true;
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while (true) {
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try t.checkCancel();
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const rc = openat_sym(dir.handle, sub_path_posix, flags, @as(usize, 0));
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switch (posix.errno(rc)) {
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.SUCCESS => return .{ .handle = @intCast(rc) },
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.INTR => continue,
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.CANCELED => return error.Canceled,
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.FAULT => |err| return errnoBug(err),
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.INVAL => return error.BadPathName,
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.BADF => |err| return errnoBug(err), // File descriptor used after closed.
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.ACCES => return error.AccessDenied,
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.LOOP => return error.SymLinkLoop,
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.MFILE => return error.ProcessFdQuotaExceeded,
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.NAMETOOLONG => return error.NameTooLong,
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.NFILE => return error.SystemFdQuotaExceeded,
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.NODEV => return error.NoDevice,
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.NOENT => return error.FileNotFound,
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.NOMEM => return error.SystemResources,
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.NOTDIR => return error.NotDir,
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.PERM => return error.PermissionDenied,
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.BUSY => return error.DeviceBusy,
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.NXIO => return error.NoDevice,
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.ILSEQ => return error.BadPathName,
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else => |err| return posix.unexpectedErrno(err),
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}
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}
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}
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fn dirOpenDirHaiku(
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userdata: ?*anyopaque,
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dir: Io.Dir,
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sub_path: []const u8,
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options: Io.Dir.OpenOptions,
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) Io.Dir.OpenError!Io.Dir {
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const t: *Threaded = @ptrCast(@alignCast(userdata));
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var path_buffer: [posix.PATH_MAX]u8 = undefined;
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const sub_path_posix = try pathToPosix(sub_path, &path_buffer);
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_ = options;
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@panic("TODO");
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while (true) {
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try t.checkCancel();
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const rc = posix.system._kern_open_dir(dir.handle, sub_path_posix);
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if (rc >= 0) return .{ .handle = rc };
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switch (@as(posix.E, @enumFromInt(rc))) {
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.INTR => continue,
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.CANCELED => return error.Canceled,
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.FAULT => |err| return errnoBug(err),
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.INVAL => |err| return errnoBug(err),
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.BADF => |err| return errnoBug(err), // File descriptor used after closed.
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.ACCES => return error.AccessDenied,
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.LOOP => return error.SymLinkLoop,
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.MFILE => return error.ProcessFdQuotaExceeded,
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.NAMETOOLONG => return error.NameTooLong,
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.NFILE => return error.SystemFdQuotaExceeded,
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.NODEV => return error.NoDevice,
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.NOENT => return error.FileNotFound,
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.NOMEM => return error.SystemResources,
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.NOTDIR => return error.NotDir,
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.PERM => return error.PermissionDenied,
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.BUSY => return error.DeviceBusy,
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else => |err| return posix.unexpectedErrno(err),
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}
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}
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}
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fn dirOpenDirWindows(
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@ -1069,96 +1069,9 @@ pub const OpenOptions = Io.Dir.OpenOptions;
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/// Deprecated in favor of `Io.Dir.openDir`.
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pub fn openDir(self: Dir, sub_path: []const u8, args: OpenOptions) OpenError!Dir {
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switch (native_os) {
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.windows => {
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var threaded: Io.Threaded = .init_single_threaded;
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const io = threaded.io();
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return .adaptFromNewApi(try Io.Dir.openDir(.{ .handle = self.fd }, io, sub_path, args));
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},
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.wasi => if (!builtin.link_libc) {
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var threaded: Io.Threaded = .init_single_threaded;
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const io = threaded.io();
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return .adaptFromNewApi(try Io.Dir.openDir(.{ .handle = self.fd }, io, sub_path, args));
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},
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else => {},
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}
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const sub_path_c = try posix.toPosixPath(sub_path);
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return self.openDirZ(&sub_path_c, args);
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}
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/// Same as `openDir` except the parameter is null-terminated.
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pub fn openDirZ(self: Dir, sub_path_c: [*:0]const u8, args: OpenOptions) OpenError!Dir {
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switch (native_os) {
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.windows => {
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@compileError("use std.Io instead");
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},
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// Use the libc API when libc is linked because it implements things
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// such as opening absolute directory paths.
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.wasi => if (!builtin.link_libc) {
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return openDir(self, mem.sliceTo(sub_path_c, 0), args);
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},
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.haiku => {
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const rc = posix.system._kern_open_dir(self.fd, sub_path_c);
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if (rc >= 0) return .{ .fd = rc };
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switch (@as(posix.E, @enumFromInt(rc))) {
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.FAULT => unreachable,
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.INVAL => unreachable,
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.BADF => unreachable,
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.ACCES => return error.AccessDenied,
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.LOOP => return error.SymLinkLoop,
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.MFILE => return error.ProcessFdQuotaExceeded,
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.NAMETOOLONG => return error.NameTooLong,
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.NFILE => return error.SystemFdQuotaExceeded,
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.NODEV => return error.NoDevice,
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.NOENT => return error.FileNotFound,
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.NOMEM => return error.SystemResources,
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.NOTDIR => return error.NotDir,
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.PERM => return error.PermissionDenied,
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.BUSY => return error.DeviceBusy,
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else => |err| return posix.unexpectedErrno(err),
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}
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},
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else => {},
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}
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var symlink_flags: posix.O = switch (native_os) {
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.wasi => .{
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.read = true,
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.NOFOLLOW = !args.follow_symlinks,
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.DIRECTORY = true,
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},
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else => .{
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.ACCMODE = .RDONLY,
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.NOFOLLOW = !args.follow_symlinks,
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.DIRECTORY = true,
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.CLOEXEC = true,
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},
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};
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if (@hasField(posix.O, "PATH") and !args.iterate)
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symlink_flags.PATH = true;
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return self.openDirFlagsZ(sub_path_c, symlink_flags);
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}
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/// Asserts `flags` has `DIRECTORY` set.
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fn openDirFlagsZ(self: Dir, sub_path_c: [*:0]const u8, flags: posix.O) OpenError!Dir {
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assert(flags.DIRECTORY);
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const fd = posix.openatZ(self.fd, sub_path_c, flags, 0) catch |err| switch (err) {
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error.FileTooBig => unreachable, // can't happen for directories
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error.IsDir => unreachable, // we're setting DIRECTORY
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error.NoSpaceLeft => unreachable, // not setting CREAT
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error.PathAlreadyExists => unreachable, // not setting CREAT
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error.FileLocksNotSupported => unreachable, // locking folders is not supported
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error.WouldBlock => unreachable, // can't happen for directories
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error.FileBusy => unreachable, // can't happen for directories
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error.SharingViolation => unreachable, // can't happen for directories
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error.PipeBusy => unreachable, // can't happen for directories
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error.AntivirusInterference => unreachable, // can't happen for directories
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error.ProcessNotFound => unreachable, // can't happen for directories
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else => |e| return e,
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};
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return Dir{ .fd = fd };
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var threaded: Io.Threaded = .init_single_threaded;
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const io = threaded.io();
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return .adaptFromNewApi(try Io.Dir.openDir(.{ .handle = self.fd }, io, sub_path, args));
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}
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pub const DeleteFileError = posix.UnlinkError;
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