Add tests for posix_spawn function

Author: Cameron Nemo

test/test.rs

@@ -33,6 +33,15 @@ mod test_pty;
 mod test_sched;
 #[cfg(any(linux_android, freebsdlike, apple_targets, solarish))]
 mod test_sendfile;
+#[cfg(any(
+    target_os = "freebsd",
+    target_os = "haiku",
+    target_os = "linux",
+    target_os = "netbsd",
+    apple_targets
+))]
+mod test_spawn;
+
 mod test_time;
 mod test_unistd;
 

test/test_spawn.rs

@@ -0,0 +1,65 @@
+use std::ffi::CString;
+
+use nix::spawn::{self, PosixSpawnAttr, PosixSpawnFileActions};
+use nix::sys::signal;
+use nix::sys::wait::{waitpid, WaitPidFlag, WaitStatus};
+
+#[test]
+fn spawn_true() {
+    let bin = &CString::new("/bin/true").unwrap();
+    let args = &[
+        CString::new("true").unwrap(),
+        CString::new("story").unwrap(),
+    ];
+    let vars: &[CString] = &[];
+    let actions = PosixSpawnFileActions::init().unwrap();
+    let attr = PosixSpawnAttr::init().unwrap();
+
+    let pid = spawn::posix_spawn(bin, &actions, &attr, args, vars).unwrap();
+
+    let status = waitpid(pid, Some(WaitPidFlag::empty())).unwrap();
+
+    match status {
+        WaitStatus::Exited(wpid, ret) => {
+            assert_eq!(pid, wpid);
+            assert_eq!(ret, 0);
+        }
+        _ => {
+            panic!("Invalid WaitStatus");
+        }
+    };
+}
+
+#[test]
+fn spawn_sleep() {
+    let bin = &CString::new("/bin/sleep").unwrap();
+    let args = &[CString::new("sleep").unwrap(), CString::new("30").unwrap()];
+    let vars: &[CString] = &[];
+    let actions = PosixSpawnFileActions::init().unwrap();
+    let attr = PosixSpawnAttr::init().unwrap();
+
+    let pid = spawn::posix_spawn(bin, &actions, &attr, args, vars).unwrap();
+
+    let status =
+        waitpid(pid, WaitPidFlag::from_bits(WaitPidFlag::WNOHANG.bits()))
+            .unwrap();
+    match status {
+        WaitStatus::StillAlive => {}
+        _ => {
+            panic!("Invalid WaitStatus");
+        }
+    };
+
+    signal::kill(pid, signal::SIGTERM).unwrap();
+
+    let status = waitpid(pid, Some(WaitPidFlag::empty())).unwrap();
+    match status {
+        WaitStatus::Signaled(wpid, wsignal, _) => {
+            assert_eq!(pid, wpid);
+            assert_eq!(wsignal, signal::SIGTERM);
+        }
+        _ => {
+            panic!("Invalid WaitStatus");
+        }
+    };
+}