From 16f33bed37ad95e879183314dacedc859900a6a4 Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Fri, 19 May 2023 07:46:34 +0000
Subject: [PATCH] Add format for server_sessions, from Magnus Gross.

---
 usr.bin/tmux/format.c | 17 ++++++++++++++++-
 usr.bin/tmux/tmux.1   |  5 +++--
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/usr.bin/tmux/format.c b/usr.bin/tmux/format.c
index 223441aaece..7420ec114cf 100644
--- a/usr.bin/tmux/format.c
+++ b/usr.bin/tmux/format.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.312 2023/03/27 08:47:57 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.313 2023/05/19 07:46:34 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2077,6 +2077,18 @@ format_cb_scroll_region_upper(struct format_tree *ft)
 	return (NULL);
 }
 
+/* Callback for server_sessions. */
+static void *
+format_cb_server_sessions(__unused struct format_tree *ft)
+{
+	struct session	*s;
+	u_int		 n = 0;
+
+	RB_FOREACH(s, sessions, &sessions)
+		n++;
+	return (format_printf("%u", n));
+}
+
 /* Callback for session_attached. */
 static void *
 format_cb_session_attached(struct format_tree *ft)
@@ -2980,6 +2992,9 @@ static const struct format_table_entry format_table[] = {
 	{ "scroll_region_upper", FORMAT_TABLE_STRING,
 	  format_cb_scroll_region_upper
 	},
+	{ "server_sessions", FORMAT_TABLE_STRING,
+	  format_cb_server_sessions
+	},
 	{ "session_activity", FORMAT_TABLE_TIME,
 	  format_cb_session_activity
 	},
diff --git a/usr.bin/tmux/tmux.1 b/usr.bin/tmux/tmux.1
index 40bb173ee32..4c8500327b0 100644
--- a/usr.bin/tmux/tmux.1
+++ b/usr.bin/tmux/tmux.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.919 2023/04/28 06:12:27 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.920 2023/05/19 07:46:34 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 28 2023 $
+.Dd $Mdocdate: May 19 2023 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -5275,6 +5275,7 @@ The following variables are available, where appropriate:
 .It Li "selection_present" Ta "" Ta "1 if selection started in copy mode"
 .It Li "selection_start_x" Ta "" Ta "X position of the start of the selection"
 .It Li "selection_start_y" Ta "" Ta "Y position of the start of the selection"
+.It Li "server_sessions" Ta "" Ta "Number of sessions"
 .It Li "session_activity" Ta "" Ta "Time of session last activity"
 .It Li "session_alerts" Ta "" Ta "List of window indexes with alerts"
 .It Li "session_attached" Ta "" Ta "Number of clients session is attached to"
-- 
2.20.1