Wildan M
57 lines
1.3 KiB
Rust
57 lines
1.3 KiB
Rust
use crate::{
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c_str::CStr,
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error::ResultExt,
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header::sys_stat::stat,
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out::Out,
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platform::{
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Pal, Sys,
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types::{c_char, c_int, c_ushort, gid_t, key_t, mode_t, uid_t},
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},
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};
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pub const IPC_R: u32 = 0o400;
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pub const IPC_W: u32 = 0o200;
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pub const IPC_M: u32 = 0o10000;
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pub const IPC_RMID: i32 = 0;
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pub const IPC_SET: i32 = 1;
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pub const IPC_STAT: i32 = 2;
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// pub const IPC_INFO: i32 = 3; non posix unimplemented
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pub const IPC_CREAT: i32 = 0o1000;
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pub const IPC_EXCL: i32 = 0o2000;
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pub const IPC_NOWAIT: i32 = 0o4000;
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pub const IPC_PRIVATE: key_t = 0;
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#[repr(C)]
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#[derive(Copy, Clone, Debug)]
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pub struct ipc_perm {
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pub __key: key_t,
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pub uid: uid_t,
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pub gid: gid_t,
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pub cuid: uid_t,
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pub cgid: gid_t,
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pub mode: mode_t,
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pub __seq: c_ushort,
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}
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/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ftok.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn ftok(path: *const c_char, id: c_int) -> key_t {
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let path = unsafe { CStr::from_ptr(path) };
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let mut stat = stat::default();
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if Sys::stat(path, Out::from_mut(&mut stat))
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.map(|()| 0)
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.or_minus_one_errno()
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== -1
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{
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return -1;
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}
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// Borrowed from musl
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return (stat.st_ino & 0xffff) as key_t
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| ((stat.st_dev & 0xff) << 16) as key_t
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| ((id & 0xff) << 24);
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}
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