| onException | Z.IO.Exception, Z.IO |
| OSName | |
| 1 (Type/Class) | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| 2 (Data Constructor) | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| os_machine | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| os_release | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| os_sysname | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| os_version | Z.IO.UV.FFI, Z.IO.Environment, Z.IO |
| OtherError | |
| 1 (Type/Class) | Z.IO.Exception, Z.IO |
| 2 (Data Constructor) | Z.IO.Exception, Z.IO |
| otherLevel | Z.IO.Logger, Z.IO |
| otherLevelTo | Z.IO.Logger, Z.IO |
| Output | Z.IO.Buffered, Z.IO |
| Overflow | Z.IO.Exception, Z.IO |
| O_APPEND | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_CREAT | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_DIRECT | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_DIRECTORY | Z.IO.UV.FFI |
| O_DSYNC | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_EXCL | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_EXLOCK | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_NOATIME | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_NOCTTY | Z.IO.UV.FFI |
| O_NOFOLLOW | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_NONBLOCK | Z.IO.UV.FFI |
| O_RANDOM | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_RDONLY | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_RDWR | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_SEQUENTIAL | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_SHORT_LIVED | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_SYMLINK | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_SYNC | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_TEMPORARY | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_TRUNC | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |
| O_WRONLY | Z.IO.UV.FFI, Z.IO.FileSystem.Threaded, Z.IO.FileSystem |