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use nix::Error;
use nix::unistd::*;
use nix::unistd::ForkResult::*;
use nix::sys::signal::*;
use nix::sys::wait::*;
use libc::_exit;
#[test]
fn test_wait_signal() {
let _ = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
// Safe: The child only calls `pause` and/or `_exit`, which are async-signal-safe.
match fork().expect("Error: Fork Failed") {
Child => {
pause();
unsafe { _exit(123) }
},
Parent { child } => {
kill(child, Some(SIGKILL)).expect("Error: Kill Failed");
assert_eq!(waitpid(child, None), Ok(WaitStatus::Signaled(child, SIGKILL, false)));
},
}
}
#[test]
fn test_wait_exit() {
let _m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
// Safe: Child only calls `_exit`, which is async-signal-safe.
match fork().expect("Error: Fork Failed") {
Child => unsafe { _exit(12); },
Parent { child } => {
assert_eq!(waitpid(child, None), Ok(WaitStatus::Exited(child, 12)));
},
}
}
#[test]
fn test_waitstatus_from_raw() {
let pid = Pid::from_raw(1);
assert_eq!(WaitStatus::from_raw(pid, 0x0002), Ok(WaitStatus::Signaled(pid, Signal::SIGINT, false)));
assert_eq!(WaitStatus::from_raw(pid, 0x0200), Ok(WaitStatus::Exited(pid, 2)));
assert_eq!(WaitStatus::from_raw(pid, 0x7f7f), Err(Error::invalid_argument()));
}
#[test]
fn test_waitstatus_pid() {
let _m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
match fork().unwrap() {
Child => unsafe { _exit(0) },
Parent { child } => {
let status = waitpid(child, None).unwrap();
assert_eq!(status.pid(), Some(child));
}
}
}
#[cfg(any(target_os = "linux", target_os = "android"))]
// FIXME: qemu-user doesn't implement ptrace on most arches
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
mod ptrace {
use nix::sys::ptrace::{self, Options, Event};
use nix::sys::signal::*;
use nix::sys::wait::*;
use nix::unistd::*;
use nix::unistd::ForkResult::*;
use libc::_exit;
fn ptrace_child() -> ! {
ptrace::traceme().unwrap();
// As recommended by ptrace(2), raise SIGTRAP to pause the child
// until the parent is ready to continue
raise(SIGTRAP).unwrap();
unsafe { _exit(0) }
}
fn ptrace_parent(child: Pid) {
// Wait for the raised SIGTRAP
assert_eq!(waitpid(child, None), Ok(WaitStatus::Stopped(child, SIGTRAP)));
// We want to test a syscall stop and a PTRACE_EVENT stop
assert!(ptrace::setoptions(child, Options::PTRACE_O_TRACESYSGOOD | Options::PTRACE_O_TRACEEXIT).is_ok());
// First, stop on the next system call, which will be exit()
assert!(ptrace::syscall(child, None).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::PtraceSyscall(child)));
// Then get the ptrace event for the process exiting
assert!(ptrace::cont(child, None).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::PtraceEvent(child, SIGTRAP, Event::PTRACE_EVENT_EXIT as i32)));
// Finally get the normal wait() result, now that the process has exited
assert!(ptrace::cont(child, None).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::Exited(child, 0)));
}
#[test]
fn test_wait_ptrace() {
require_capability!(CAP_SYS_PTRACE);
let _m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
match fork().expect("Error: Fork Failed") {
Child => ptrace_child(),
Parent { child } => ptrace_parent(child),
}
}
}
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