Query the operating system. The following codes are currently available for supported operating systems:
| beos | BeOS |
| dos | DOS |
| hpux | HP-UX |
| linux | Linux |
| macos | Mac OS |
| macosx | Mac OS X |
| nextstep | NeXTStep |
| sinix | SINIX |
| sunos | SunOS |
| tos | Atari TOS |
| win | Windows (32 bit) |
| Type & position: | command, preamble & main part |
| Syntax: | !ifnos [<system>] |
| Description: | This command tests the current operating system UDO is running
on. If doesn't match any of the abbreviations of the operating systems UDO will convert all lines that follow !else if it is used. If !else isn't used UDO will ignore all lines until an !endif. The example shows how you can test if UDO does not run on an Apple Macintosh. |
| Example: | !ifnos [macos] |
| Exists since: | Release 5 Patchlevel 16 |
| See also: | !ifos, Query commands |