setpgid: Add tool

tests/by-util/test_setpgid.rs

@@ -0,0 +1,37 @@
+// This file is part of the uutils util-linux package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use regex::Regex;
+use uutests::new_ucmd;
+
+#[test]
+#[cfg(target_family = "unix")]
+fn test_nonexistent_program() {
+    new_ucmd!()
+        .arg("does_not_exist")
+        .fails()
+        .stderr_contains("failed to execute");
+}
+
+#[test]
+#[cfg(target_os = "linux")]
+fn test_pgid_changed() {
+    let our_pgid = unsafe { libc::getpgid(0) };
+    // Gets pgid of the 'cut' process from /proc
+    new_ucmd!()
+        .args(&["cut", "-d", " ", "-f", "5", "/proc/self/stat"])
+        .succeeds()
+        .stdout_does_not_match(&Regex::new(&format!("^{}$", our_pgid)).unwrap());
+}
+
+#[test]
+#[cfg(target_family = "unix")]
+fn test_flag_after_command() {
+    new_ucmd!()
+        .arg("echo")
+        .arg("-f")
+        .succeeds()
+        .stdout_is("-f\n");
+}

tests/tests.rs

@@ -55,6 +55,10 @@ mod test_renice;
 #[path = "by-util/test_rev.rs"]
 mod test_rev;
 
+#[cfg(feature = "setpgid")]
+#[path = "by-util/test_setpgid.rs"]
+mod test_setpgid;
+
 #[cfg(feature = "setsid")]
 #[path = "by-util/test_setsid.rs"]
 mod test_setsid;