From 22355ce947da7acd8863d7f7a467324ad030faec Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicm@openbsd.org>
Date: Sun, 12 Jul 2009 16:07:56 +0000
Subject: [PATCH] If it exist, load a system-wide configuration file
 /etc/tmux.conf before any user-specified one.

---
 server.c | 11 +++++++++++
 tmux.1   |  8 ++++++--
 tmux.h   |  3 ++-
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/server.c b/server.c
index 6ba83d87..e9986a72 100644
--- a/server.c
+++ b/server.c
@@ -171,6 +171,17 @@ server_start(char *path)
 	start_time = time(NULL);
 	socket_path = path;
 
+	if (access(SYSTEM_CFG, R_OK) != 0) {
+		if (errno != ENOENT) {
+			log_warn("%s", SYSTEM_CFG);
+			exit(1);
+		}
+	} else {
+		if (load_cfg(SYSTEM_CFG, &cause) != 0) {
+			log_warnx("%s", cause);
+			exit(1);
+		}
+	}
 	if (cfg_file != NULL && load_cfg(cfg_file, &cause) != 0) {
 		log_warnx("%s", cause);
 		exit(1);
diff --git a/tmux.1 b/tmux.1
index f0294ce1..588d70e4 100644
--- a/tmux.1
+++ b/tmux.1
@@ -70,7 +70,9 @@ to assume the terminal supports default colours.
 Specify an alternative configuration file.
 By default,
 .Nm
-will look for a config file at
+loads the system configuration file from
+.Pa /etc/tmux.conf ,
+if present, then looks for a user configuration file at
 .Pa ~/.tmux.conf .
 The configuration file is a set of
 .Nm
@@ -1549,11 +1551,13 @@ not be linked to no sessions.
 Move up a pane.
 .El
 .Sh FILES
-.Bl -tag -width "~/.tmux.confXXX" -compact
+.Bl -tag -width "/etc/tmux.confXXX" -compact
 .It Pa ~/.tmux.conf
 Default
 .Nm
 configuration file.
+.It Pa /etc/tmux.conf
+System-wide configuration file.
 .El
 .Sh SEE ALSO
 .Xr pty 4
diff --git a/tmux.h b/tmux.h
index 02f08ed4..d2409f62 100644
--- a/tmux.h
+++ b/tmux.h
@@ -40,8 +40,9 @@
 
 extern const char    *__progname;
 
-/* Default configuration file. */
+/* Default configuration files. */
 #define DEFAULT_CFG ".tmux.conf"
+#define SYSTEM_CFG "/etc/tmux.conf"
 
 /* Default prompt history length. */
 #define PROMPT_HISTORY 100