Fix for lost clipboard contents (helix-editor#5424) (helix-editor#5426)

* Fix for lost clipboard contents (helix-editor#5424)

* PR feedback: Call "setsid" for all unix systems

* PR Feedback: Only install libc for unix targets

helix-view/Cargo.toml

@@ -48,5 +48,8 @@ which = "4.2"
 [target.'cfg(windows)'.dependencies]
 clipboard-win = { version = "4.5", features = ["std"] }
 
+[target.'cfg(unix)'.dependencies]
+libc = "0.2"
+
 [dev-dependencies]
 helix-tui = { path = "../helix-tui" }

helix-view/src/clipboard.rs

@@ -276,12 +276,27 @@ pub mod provider {
                 let stdin = input.map(|_| Stdio::piped()).unwrap_or_else(Stdio::null);
                 let stdout = pipe_output.then(Stdio::piped).unwrap_or_else(Stdio::null);
 
-                let mut child = Command::new(self.prg)
+                let mut command: Command = Command::new(self.prg);
+
+                let mut command_mut: &mut Command = command
                     .args(self.args)
                     .stdin(stdin)
                     .stdout(stdout)
-                    .stderr(Stdio::null())
-                    .spawn()?;
+                    .stderr(Stdio::null());
+
+                // Fix for https://github.com/helix-editor/helix/issues/5424
+                if cfg!(unix) {
+                    use std::os::unix::process::CommandExt;
+
+                    unsafe {
+                        command_mut = command_mut.pre_exec(|| match libc::setsid() {
+                            -1 => Err(std::io::Error::last_os_error()),
+                            _ => Ok(()),
+                        });
+                    }
+                }
+
+                let mut child = command_mut.spawn()?;
 
                 if let Some(input) = input {
                     let mut stdin = child.stdin.take().context("stdin is missing")?;