| ... | ... | @@ -5328,3 +5328,71 @@ pub fn signalfd(fd: fd_t, mask: *const sigset_t, flags: u32) !fd_t { |
| 5328 | 5328 | else => |err| return std.os.unexpectedErrno(err), |
| 5329 | 5329 | } |
| 5330 | 5330 | } |
| 5331 | |
| 5332 | pub const SyncError = error{ |
| 5333 | InputOutput, |
| 5334 | NoSpaceLeft, |
| 5335 | DiskQuota, |
| 5336 | AccessDenied, |
| 5337 | } || UnexpectedError; |
| 5338 | |
| 5339 | /// Write all pending file contents and metadata modifications to all filesystems. |
| 5340 | pub fn sync() void { |
| 5341 | system.sync(); |
| 5342 | } |
| 5343 | |
| 5344 | /// Write all pending file contents and metadata modifications to the filesystem which contains the specified file. |
| 5345 | pub fn syncfs(fd: fd_t) SyncError!void { |
| 5346 | const rc = system.syncfs(fd); |
| 5347 | switch (errno(rc)) { |
| 5348 | 0 => return, |
| 5349 | EBADF, EINVAL, EROFS => unreachable, |
| 5350 | EIO => return error.InputOutput, |
| 5351 | ENOSPC => return error.NoSpaceLeft, |
| 5352 | EDQUOT => return error.DiskQuota, |
| 5353 | else => |err| return std.os.unexpectedErrno(err), |
| 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | /// Write all pending file contents and metadata modifications for the specified file descriptor to the underlying filesystem. |
| 5358 | pub fn fsync(fd: fd_t) SyncError!void { |
| 5359 | if (std.Target.current.os.tag == .windows) { |
| 5360 | if (windows.kernel32.FlushFileBuffers(fd) != 0) |
| 5361 | return; |
| 5362 | switch (windows.kernel32.GetLastError()) { |
| 5363 | .SUCCESS => return, |
| 5364 | .INVALID_HANDLE => unreachable, |
| 5365 | .ACCESS_DENIED => return error.AccessDenied, // a sync was performed but the system couldn't update the access time |
| 5366 | .UNEXP_NET_ERR => return error.InputOutput, |
| 5367 | else => return error.InputOutput, |
| 5368 | } |
| 5369 | } |
| 5370 | const rc = system.fsync(fd); |
| 5371 | switch (errno(rc)) { |
| 5372 | 0 => return, |
| 5373 | EBADF, EINVAL, EROFS => unreachable, |
| 5374 | EIO => return error.InputOutput, |
| 5375 | ENOSPC => return error.NoSpaceLeft, |
| 5376 | EDQUOT => return error.DiskQuota, |
| 5377 | else => |err| return std.os.unexpectedErrno(err), |
| 5378 | } |
| 5379 | } |
| 5380 | |
| 5381 | /// Write all pending file contents for the specified file descriptor to the underlying filesystem, but not necessarily the metadata. |
| 5382 | pub fn fdatasync(fd: fd_t) SyncError!void { |
| 5383 | if (std.Target.current.os.tag == .windows) { |
| 5384 | return fsync(fd) catch |err| switch (err) { |
| 5385 | SyncError.AccessDenied => return, // fdatasync doesn't promise that the access time was synced |
| 5386 | else => return err, |
| 5387 | }; |
| 5388 | } |
| 5389 | const rc = system.fdatasync(fd); |
| 5390 | switch (errno(rc)) { |
| 5391 | 0 => return, |
| 5392 | EBADF, EINVAL, EROFS => unreachable, |
| 5393 | EIO => return error.InputOutput, |
| 5394 | ENOSPC => return error.NoSpaceLeft, |
| 5395 | EDQUOT => return error.DiskQuota, |
| 5396 | else => |err| return std.os.unexpectedErrno(err), |
| 5397 | } |
| 5398 | } |
Aransentin <jens.goldberg@gmail.com> 2020-09-02 22:16:40+00:00