BSD syscall#124
svc · unix #124
fchmod
Changes the mode of a file referenced by an open descriptor.
Prototype
int fchmod(int fd, int mode);Returns: int
Arguments
| Name | Type | Dir | Description |
|---|---|---|---|
| fd | int | - | |
| mode | int | - |
Version history
| XNU tag | macOS | # |
|---|---|---|
| xnu-1456.1.26 | macOS 10.6 Snow Leopard | 124 |
| xnu-1486.2.11 | — | 124 |
| xnu-1504.15.3 | — | 124 |
| xnu-1504.3.12 | — | 124 |
| xnu-1504.7.4 | — | 124 |
| xnu-1504.9.17 | — | 124 |
| xnu-1504.9.26 | — | 124 |
| xnu-1504.9.37 | — | 124 |
Notes
Identical permission rules to chmod. Useful when a caller has already opened a temporary file and wants to set the final permissions atomically before linking it into place.
Detection
ES NOTIFY_SETMODE surfaces the new mode and target vnode.
Related APIs
chmodfchmodatfchownopenstat