| use crate::io; |
| use crate::mem; |
| use crate::ptr; |
| |
| use crate::sys::process::zircon::{Handle, zx_handle_t}; |
| use crate::sys::process::process_common::*; |
| |
| use libc::size_t; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Command |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| impl Command { |
| pub fn spawn(&mut self, default: Stdio, needs_stdin: bool) |
| -> io::Result<(Process, StdioPipes)> { |
| let envp = self.capture_env(); |
| |
| if self.saw_nul() { |
| return Err(io::Error::new(io::ErrorKind::InvalidInput, |
| "nul byte found in provided data")); |
| } |
| |
| let (ours, theirs) = self.setup_io(default, needs_stdin)?; |
| |
| let process_handle = unsafe { self.do_exec(theirs, envp.as_ref())? }; |
| |
| Ok((Process { handle: Handle::new(process_handle) }, ours)) |
| } |
| |
| pub fn exec(&mut self, default: Stdio) -> io::Error { |
| if self.saw_nul() { |
| return io::Error::new(io::ErrorKind::InvalidInput, |
| "nul byte found in provided data") |
| } |
| |
| match self.setup_io(default, true) { |
| Ok((_, _)) => { |
| // FIXME: This is tough because we don't support the exec syscalls |
| unimplemented!(); |
| }, |
| Err(e) => e, |
| } |
| } |
| |
| unsafe fn do_exec(&mut self, stdio: ChildPipes, maybe_envp: Option<&CStringArray>) |
| -> io::Result<zx_handle_t> { |
| use crate::sys::process::zircon::*; |
| |
| let envp = match maybe_envp { |
| // None means to clone the current environment, which is done in the |
| // flags below. |
| None => ptr::null(), |
| Some(envp) => envp.as_ptr(), |
| }; |
| |
| let make_action = |local_io: &ChildStdio, target_fd| -> io::Result<fdio_spawn_action_t> { |
| if let Some(local_fd) = local_io.fd() { |
| Ok(fdio_spawn_action_t { |
| action: FDIO_SPAWN_ACTION_TRANSFER_FD, |
| local_fd, |
| target_fd, |
| ..Default::default() |
| }) |
| } else { |
| if let ChildStdio::Null = local_io { |
| // acts as no-op |
| return Ok(Default::default()); |
| } |
| |
| let mut handle = ZX_HANDLE_INVALID; |
| let status = fdio_fd_clone(target_fd, &mut handle); |
| if status == ERR_INVALID_ARGS || status == ERR_NOT_SUPPORTED { |
| // This descriptor is closed; skip it rather than generating an |
| // error. |
| return Ok(Default::default()); |
| } |
| zx_cvt(status)?; |
| |
| let mut cloned_fd = 0; |
| zx_cvt(fdio_fd_create(handle, &mut cloned_fd))?; |
| |
| Ok(fdio_spawn_action_t { |
| action: FDIO_SPAWN_ACTION_TRANSFER_FD, |
| local_fd: cloned_fd as i32, |
| target_fd, |
| ..Default::default() |
| }) |
| } |
| }; |
| |
| // Clone stdin, stdout, and stderr |
| let action1 = make_action(&stdio.stdin, 0)?; |
| let action2 = make_action(&stdio.stdout, 1)?; |
| let action3 = make_action(&stdio.stderr, 2)?; |
| let actions = [action1, action2, action3]; |
| |
| // We don't want FileDesc::drop to be called on any stdio. fdio_spawn_etc |
| // always consumes transferred file descriptors. |
| mem::forget(stdio); |
| |
| for callback in self.get_closures().iter_mut() { |
| callback()?; |
| } |
| |
| let mut process_handle: zx_handle_t = 0; |
| zx_cvt(fdio_spawn_etc( |
| ZX_HANDLE_INVALID, |
| FDIO_SPAWN_CLONE_JOB | FDIO_SPAWN_CLONE_LDSVC | FDIO_SPAWN_CLONE_NAMESPACE |
| | FDIO_SPAWN_CLONE_ENVIRON, // this is ignored when envp is non-null |
| self.get_argv()[0], self.get_argv().as_ptr(), envp, |
| actions.len() as size_t, actions.as_ptr(), |
| &mut process_handle, |
| ptr::null_mut(), |
| ))?; |
| // FIXME: See if we want to do something with that err_msg |
| |
| Ok(process_handle) |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Processes |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| pub struct Process { |
| handle: Handle, |
| } |
| |
| impl Process { |
| pub fn id(&self) -> u32 { |
| self.handle.raw() as u32 |
| } |
| |
| pub fn kill(&mut self) -> io::Result<()> { |
| use crate::sys::process::zircon::*; |
| |
| unsafe { zx_cvt(zx_task_kill(self.handle.raw()))?; } |
| |
| Ok(()) |
| } |
| |
| pub fn wait(&mut self) -> io::Result<ExitStatus> { |
| use crate::default::Default; |
| use crate::sys::process::zircon::*; |
| |
| let mut proc_info: zx_info_process_t = Default::default(); |
| let mut actual: size_t = 0; |
| let mut avail: size_t = 0; |
| |
| unsafe { |
| zx_cvt(zx_object_wait_one(self.handle.raw(), ZX_TASK_TERMINATED, |
| ZX_TIME_INFINITE, ptr::null_mut()))?; |
| zx_cvt(zx_object_get_info(self.handle.raw(), ZX_INFO_PROCESS, |
| &mut proc_info as *mut _ as *mut libc::c_void, |
| mem::size_of::<zx_info_process_t>(), &mut actual, |
| &mut avail))?; |
| } |
| if actual != 1 { |
| return Err(io::Error::new(io::ErrorKind::InvalidData, |
| "Failed to get exit status of process")); |
| } |
| Ok(ExitStatus::new(proc_info.rec.return_code)) |
| } |
| |
| pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> { |
| use crate::default::Default; |
| use crate::sys::process::zircon::*; |
| |
| let mut proc_info: zx_info_process_t = Default::default(); |
| let mut actual: size_t = 0; |
| let mut avail: size_t = 0; |
| |
| unsafe { |
| let status = zx_object_wait_one(self.handle.raw(), ZX_TASK_TERMINATED, |
| 0, ptr::null_mut()); |
| match status { |
| 0 => { }, // Success |
| x if x == ERR_TIMED_OUT => { |
| return Ok(None); |
| }, |
| _ => { panic!("Failed to wait on process handle: {}", status); }, |
| } |
| zx_cvt(zx_object_get_info(self.handle.raw(), ZX_INFO_PROCESS, |
| &mut proc_info as *mut _ as *mut libc::c_void, |
| mem::size_of::<zx_info_process_t>(), &mut actual, |
| &mut avail))?; |
| } |
| if actual != 1 { |
| return Err(io::Error::new(io::ErrorKind::InvalidData, |
| "Failed to get exit status of process")); |
| } |
| Ok(Some(ExitStatus::new(proc_info.rec.return_code))) |
| } |
| } |