feat: add generic ioctl support #1819
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mkroening
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Jul 8, 2025
src/fs/ioctl.rs
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| #[derive(Copy, Clone)] | ||
| pub struct IoCtlCall(pub u32); |
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We could use bitfield-struct for these bitfield types, which is already a transitive dependency.
We should link to the reference header (this one?) in the doc comments of this struct.
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This PR adds an ioctl handler to file descriptor objects, such as sockets, and a helper to register any ioctl handler at a particular file system path.
Some Linux-specific crates communicate with the kernel via the use of an ioctl file. Support of ioctls may provide an easy path when porting such libraries to work with hermit, without increasing too much the size of the ABI for too specific features.