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use io;
use libc::{self, size_t};
use mem;
use ptr;
use sys::process::zircon::{Handle, zx_handle_t};
use sys::process::process_common::*;
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((_, _)) => {
unimplemented!();
},
Err(e) => e,
}
}
unsafe fn do_exec(&mut self, stdio: ChildPipes, maybe_envp: Option<&CStringArray>)
-> io::Result<zx_handle_t> {
use sys::process::zircon::*;
let job_handle = zx_job_default();
let envp = match maybe_envp {
Some(envp) => envp.as_ptr(),
None => ptr::null(),
};
struct LaunchpadDestructor(*mut launchpad_t);
impl Drop for LaunchpadDestructor {
fn drop(&mut self) { unsafe { launchpad_destroy(self.0); } }
}
let mut job_copy: zx_handle_t = ZX_HANDLE_INVALID;
zx_cvt(zx_handle_duplicate(job_handle, ZX_RIGHT_SAME_RIGHTS, &mut job_copy))?;
let mut launchpad: *mut launchpad_t = ptr::null_mut();
zx_cvt(launchpad_create(job_copy, self.get_argv()[0], &mut launchpad))?;
let launchpad_destructor = LaunchpadDestructor(launchpad);
zx_cvt(launchpad_set_args(launchpad, self.get_argv().len() as i32 - 1,
self.get_argv().as_ptr()))?;
zx_cvt(launchpad_set_environ(launchpad, envp))?;
zx_cvt(launchpad_add_vdso_vmo(launchpad))?;
zx_cvt(launchpad_elf_load(launchpad, launchpad_vmo_from_file(self.get_argv()[0])))?;
zx_cvt(launchpad_load_vdso(launchpad, ZX_HANDLE_INVALID))?;
zx_cvt(launchpad_clone(launchpad, LP_CLONE_FDIO_NAMESPACE | LP_CLONE_FDIO_CWD))?;
if let Some(fd) = stdio.stdin.fd() {
zx_cvt(launchpad_transfer_fd(launchpad, fd, 0))?;
} else {
zx_cvt(launchpad_clone_fd(launchpad, 0, 0))?;
}
if let Some(fd) = stdio.stdout.fd() {
zx_cvt(launchpad_transfer_fd(launchpad, fd, 1))?;
} else {
zx_cvt(launchpad_clone_fd(launchpad, 1, 1))?;
}
if let Some(fd) = stdio.stderr.fd() {
zx_cvt(launchpad_transfer_fd(launchpad, fd, 2))?;
} else {
zx_cvt(launchpad_clone_fd(launchpad, 2, 2))?;
}
mem::forget(stdio);
for callback in self.get_closures().iter_mut() {
callback()?;
}
mem::forget(launchpad_destructor);
let mut process_handle: zx_handle_t = 0;
let mut err_msg: *const libc::c_char = ptr::null();
zx_cvt(launchpad_go(launchpad, &mut process_handle, &mut err_msg))?;
Ok(process_handle)
}
}
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 sys::process::zircon::*;
unsafe { zx_cvt(zx_task_kill(self.handle.raw()))?; }
Ok(())
}
pub fn wait(&mut self) -> io::Result<ExitStatus> {
use default::Default;
use 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 default::Default;
use 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 => { },
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)))
}
}