diff options
Diffstat (limited to 'third_party/rust/nix/src/sys/ioctl/bsd.rs')
-rw-r--r-- | third_party/rust/nix/src/sys/ioctl/bsd.rs | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/third_party/rust/nix/src/sys/ioctl/bsd.rs b/third_party/rust/nix/src/sys/ioctl/bsd.rs new file mode 100644 index 0000000000..307994cb96 --- /dev/null +++ b/third_party/rust/nix/src/sys/ioctl/bsd.rs @@ -0,0 +1,129 @@ +/// The datatype used for the ioctl number +#[doc(hidden)] +#[cfg(not(target_os = "illumos"))] +pub type ioctl_num_type = ::libc::c_ulong; + +#[doc(hidden)] +#[cfg(target_os = "illumos")] +pub type ioctl_num_type = ::libc::c_int; + +/// The datatype used for the 3rd argument +#[doc(hidden)] +pub type ioctl_param_type = ::libc::c_int; + +mod consts { + use crate::sys::ioctl::ioctl_num_type; + #[doc(hidden)] + pub const VOID: ioctl_num_type = 0x2000_0000; + #[doc(hidden)] + pub const OUT: ioctl_num_type = 0x4000_0000; + #[doc(hidden)] + #[allow(overflowing_literals)] + pub const IN: ioctl_num_type = 0x8000_0000; + #[doc(hidden)] + pub const INOUT: ioctl_num_type = IN | OUT; + #[doc(hidden)] + pub const IOCPARM_MASK: ioctl_num_type = 0x1fff; +} + +pub use self::consts::*; + +#[macro_export] +#[doc(hidden)] +macro_rules! ioc { + ($inout:expr, $group:expr, $num:expr, $len:expr) => { + $inout + | (($len as $crate::sys::ioctl::ioctl_num_type + & $crate::sys::ioctl::IOCPARM_MASK) + << 16) + | (($group as $crate::sys::ioctl::ioctl_num_type) << 8) + | ($num as $crate::sys::ioctl::ioctl_num_type) + }; +} + +/// Generate an ioctl request code for a command that passes no data. +/// +/// This is equivalent to the `_IO()` macro exposed by the C ioctl API. +/// +/// You should only use this macro directly if the `ioctl` you're working +/// with is "bad" and you cannot use `ioctl_none!()` directly. +/// +/// # Example +/// +/// ``` +/// # #[macro_use] extern crate nix; +/// const KVMIO: u8 = 0xAE; +/// ioctl_write_int_bad!(kvm_create_vm, request_code_none!(KVMIO, 0x03)); +/// # fn main() {} +/// ``` +#[macro_export(local_inner_macros)] +macro_rules! request_code_none { + ($g:expr, $n:expr) => { + ioc!($crate::sys::ioctl::VOID, $g, $n, 0) + }; +} + +/// Generate an ioctl request code for a command that passes an integer +/// +/// This is equivalent to the `_IOWINT()` macro exposed by the C ioctl API. +/// +/// You should only use this macro directly if the `ioctl` you're working +/// with is "bad" and you cannot use `ioctl_write_int!()` directly. +#[macro_export(local_inner_macros)] +macro_rules! request_code_write_int { + ($g:expr, $n:expr) => { + ioc!( + $crate::sys::ioctl::VOID, + $g, + $n, + ::std::mem::size_of::<$crate::libc::c_int>() + ) + }; +} + +/// Generate an ioctl request code for a command that reads. +/// +/// This is equivalent to the `_IOR()` macro exposed by the C ioctl API. +/// +/// You should only use this macro directly if the `ioctl` you're working +/// with is "bad" and you cannot use `ioctl_read!()` directly. +/// +/// The read/write direction is relative to userland, so this +/// command would be userland is reading and the kernel is +/// writing. +#[macro_export(local_inner_macros)] +macro_rules! request_code_read { + ($g:expr, $n:expr, $len:expr) => { + ioc!($crate::sys::ioctl::OUT, $g, $n, $len) + }; +} + +/// Generate an ioctl request code for a command that writes. +/// +/// This is equivalent to the `_IOW()` macro exposed by the C ioctl API. +/// +/// You should only use this macro directly if the `ioctl` you're working +/// with is "bad" and you cannot use `ioctl_write!()` directly. +/// +/// The read/write direction is relative to userland, so this +/// command would be userland is writing and the kernel is +/// reading. +#[macro_export(local_inner_macros)] +macro_rules! request_code_write { + ($g:expr, $n:expr, $len:expr) => { + ioc!($crate::sys::ioctl::IN, $g, $n, $len) + }; +} + +/// Generate an ioctl request code for a command that reads and writes. +/// +/// This is equivalent to the `_IOWR()` macro exposed by the C ioctl API. +/// +/// You should only use this macro directly if the `ioctl` you're working +/// with is "bad" and you cannot use `ioctl_readwrite!()` directly. +#[macro_export(local_inner_macros)] +macro_rules! request_code_readwrite { + ($g:expr, $n:expr, $len:expr) => { + ioc!($crate::sys::ioctl::INOUT, $g, $n, $len) + }; +} |