()
| 33 | |
| 34 | #[inline] |
| 35 | pub(crate) unsafe fn kernel_fork() -> io::Result<Fork> { |
| 36 | let mut child_pid = MaybeUninit::<RawPid>::uninit(); |
| 37 | |
| 38 | // Unix `fork` only returns the child PID in the parent; we'd like it in |
| 39 | // the child too, so set `CLONE_CHILD_SETTID` and pass in the address of a |
| 40 | // memory location to store it to in the child. |
| 41 | // |
| 42 | // Architectures differ on the order of the parameters. |
| 43 | #[cfg(target_arch = "x86_64")] |
| 44 | let pid = ret_c_int(syscall!( |
| 45 | __NR_clone, |
| 46 | c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID), |
| 47 | zero(), |
| 48 | zero(), |
| 49 | &mut child_pid, |
| 50 | zero() |
| 51 | ))?; |
| 52 | #[cfg(any( |
| 53 | target_arch = "aarch64", |
| 54 | target_arch = "arm", |
| 55 | target_arch = "mips", |
| 56 | target_arch = "mips32r6", |
| 57 | target_arch = "mips64", |
| 58 | target_arch = "mips64r6", |
| 59 | target_arch = "powerpc", |
| 60 | target_arch = "powerpc64", |
| 61 | target_arch = "riscv64", |
| 62 | target_arch = "s390x", |
| 63 | target_arch = "x86" |
| 64 | ))] |
| 65 | let pid = ret_c_int(syscall!( |
| 66 | __NR_clone, |
| 67 | c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID), |
| 68 | zero(), |
| 69 | zero(), |
| 70 | zero(), |
| 71 | &mut child_pid |
| 72 | ))?; |
| 73 | |
| 74 | Ok(if let Some(pid) = Pid::from_raw(pid) { |
| 75 | Fork::ParentOf(pid) |
| 76 | } else { |
| 77 | Fork::Child(Pid::from_raw_unchecked(child_pid.assume_init())) |
| 78 | }) |
| 79 | } |
| 80 | |
| 81 | #[cfg(feature = "fs")] |
| 82 | pub(crate) unsafe fn execveat( |
nothing calls this directly
no test coverage detected