Rollup merge of #142391 - LevitatingBusinessMan:setsid, r=workingjubilee

rust: library: Add `setsid` method to `CommandExt` trait

Add a setsid method to the CommandExt trait so that callers can create a process in a new session and process group whilst still using the POSIX spawn fast path.

Tracking issue: rust-lang/rust#105376

ACP: https://github.com/rust-lang/libs-team/issues/184

This PR was previously submitted by ``@HarveyHunt`` (whom I marked as Co-Author in the commit message) in rust-lang/rust#105377. However that PR went stale.

I applied the [suggestion](https://github.com/rust-lang/rust/pull/105377/files/231d19fcbfe155b2e85116865adae4253380ff1f#r1893457943) to change the function signature to `fn setsid(&mut self, setsid: bool) -> &mut Command`.

1 files changed, 8 insertions, 0 deletions

diff --git a/library/std/src/os/unix/process.rs b/library/std/src/os/unix/process.rs
index 466b134d8fa..76e63a69e45 100644
--- a/library/std/src/os/unix/process.rs
+++ b/library/std/src/os/unix/process.rs
@@ -210,6 +210,9 @@ pub trait CommandExt: Sealed {
     /// intentional difference from the underlying `chroot` system call.)
     #[unstable(feature = "process_chroot", issue = "141298")]
     fn chroot<P: AsRef<Path>>(&mut self, dir: P) -> &mut process::Command;
+
+    #[unstable(feature = "process_setsid", issue = "105376")]
+    fn setsid(&mut self, setsid: bool) -> &mut process::Command;
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -260,6 +263,11 @@ impl CommandExt for process::Command {
         self.as_inner_mut().chroot(dir.as_ref());
         self
     }
+
+    fn setsid(&mut self, setsid: bool) -> &mut process::Command {
+        self.as_inner_mut().setsid(setsid);
+        self
+    }
 }
 
 /// Unix-specific extensions to [`process::ExitStatus`] and