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commit 3823fa2c577d440649a84af660e4d3b0c095d248
Author: Nicholas Marriott <nicholas.marriott@gmail.com>
Date:   Tue Apr 30 12:38:58 2024 +0100
Forwarded: not-needed

    Send SIGHUP since some programs ignore SIGTERM, from Eduardo Grajeda in GitHub
    issue 3958.

Origin: upstream, https://github.com/tmux/tmux/commit/3823fa2c577d440649a84af660e4d3b0c095d248

diff --git a/compat/systemd.c b/compat/systemd.c
index 063474e3dd..bde372ccab 100644
--- a/compat/systemd.c
+++ b/compat/systemd.c
@@ -144,6 +144,17 @@ systemd_move_pid_to_new_cgroup(pid_t pid, char **cause)
 		goto finish;
 	}
 
+	/*
+	 * Make sure that the session shells are terminated with SIGHUP since
+	 * bash and friends tend to ignore SIGTERM.
+	 */
+	r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", 1);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
 	/*
 	 * Inherit the slice from the parent process, or default to
 	 * "app-tmux.slice" if that fails.