From 39869c8b353cde68ef9e8b7482ea8eb46445ccfa Mon Sep 17 00:00:00 2001
From: eldritch horrors <pennae@lix.systems>
Date: Mon, 19 Jan 2026 19:28:46 +0100
Subject: [PATCH] libutil: add setsid support to runProgram2

Change-Id: I9c023f2497cab12f1a7bfafd0baa82ffb5912d3e
---
 lix/libutil/processes.cc | 3 +++
 lix/libutil/processes.hh | 1 +
 2 files changed, 4 insertions(+)

diff --git a/lix/libutil/processes.cc b/lix/libutil/processes.cc
index 0d709ad16..7bfaa7acc 100644
--- a/lix/libutil/processes.cc
+++ b/lix/libutil/processes.cc
@@ -350,6 +350,9 @@ RunningProgram runProgram2(const RunOptions & options)
     /* Fork. */
     Pid pid{startProcess(
         [&]() {
+            if (options.createSession && setsid() == -1) {
+                throw SysError("setsid");
+            }
             if (options.environment) {
                 replaceEnv(*options.environment);
             }
diff --git a/lix/libutil/processes.hh b/lix/libutil/processes.hh
index 7e05f607d..568c66cdb 100644
--- a/lix/libutil/processes.hh
+++ b/lix/libutil/processes.hh
@@ -96,6 +96,7 @@ struct RunOptions
     std::optional<std::map<std::string, std::string>> environment = {};
     bool dieWithParent = true;
     bool captureStdout = false;
+    bool createSession = false;
     std::vector<Redirection> redirections;
 #if __linux__
     std::set<long> caps;