BSD syscall#393
svc · unix #393
__mac_set_lctx
Updates the MAC label of the calling thread's login context.
Prototype
int __mac_set_lctx(struct mac *mac_p);Returns: int
Arguments
| Name | Type | Dir | Description |
|---|---|---|---|
| mac_p | struct mac | - |
Version history
| XNU tag | macOS | # |
|---|---|---|
| xnu-1456.1.26 | macOS 10.6 Snow Leopard | 393 |
| xnu-1699.24.8 | macOS 10.7 Lion | 393 |
| xnu-2050.18.24 | macOS 10.8 Mountain Lion | 393 |
| xnu-2422.115.4 | macOS 10.9 Mavericks | 393 |
| xnu-2782.40.9 | macOS 10.10 Yosemite | 393 |
| xnu-1486.2.11 | — | 393 |
| xnu-1504.15.3 | — | 393 |
| xnu-1504.3.12 | — | 393 |
| xnu-1504.7.4 | — | 393 |
| xnu-1504.9.17 | — | 393 |
| xnu-1504.9.26 | — | 393 |
| xnu-1504.9.37 | — | 393 |
| xnu-1699.22.73 | — | 393 |
| xnu-1699.22.81 | — | 393 |
| xnu-1699.24.23 | — | 393 |
| xnu-1699.26.8 | — | 393 |
| xnu-1699.32.7 | — | 393 |
| xnu-2050.22.13 | — | 393 |
| xnu-2050.24.15 | — | 393 |
| xnu-2050.48.11 | — | 393 |
| xnu-2050.7.9 | — | 393 |
| xnu-2050.9.2 | — | 393 |
| xnu-2422.1.72 | — | 393 |
| xnu-2422.100.13 | — | 393 |
| xnu-2422.110.17 | — | 393 |
| xnu-2422.90.20 | — | 393 |
| xnu-2782.1.97 | — | 393 |
| xnu-2782.10.72 | — | 393 |
| xnu-2782.20.48 | — | 393 |
| xnu-2782.30.5 | — | 393 |
Notes
Writes the lctx label after the affected policies' mpo_lctx_check_label_update hooks accept the change. Like its siblings it is effectively dead code on shipping macOS; expect ENOSYS or policy refusal.
Detection
Any invocation should be considered hostile reconnaissance of unused syscall surface.
Related APIs
__mac_get_lctx__mac_get_lcid