Infrastructure and commands to manage the environment for processes started

within tmux.

There is a global environment, copied from the external environment when the
server is started and each sesssion has an (initially empty) session
environment which overrides it.

New commands set-environment and show-environment manipulate or display the
environments.

A new session option, update-environment, is a space-separated list of
variables which are updated from the external environment into the session
environment every time a new session is created - the default is DISPLAY.

1 files changed, 10 insertions, 0 deletions

diff --git a/server-msg.c b/server-msg.c
index 2ee357ed..b23ec4c4 100644
--- a/server-msg.c
+++ b/server-msg.c
@@ -42,6 +42,7 @@ server_msg_dispatch(struct client *c)
 	struct msg_identify_data identifydata;
 	struct msg_resize_data	 resizedata;
 	struct msg_unlock_data	 unlockdata;
+	struct msg_environ_data	 environdata;
 
 	for (;;) {
 		if (BUFFER_USED(c->in) < sizeof hdr)
@@ -100,6 +101,15 @@ server_msg_dispatch(struct client *c)
 			tty_start_tty(&c->tty);
 			server_redraw_client(c);
 			break;
+		case MSG_ENVIRON:
+			if (hdr.size != sizeof environdata)
+				fatalx("bad MSG_ENVIRON size");
+			buffer_read(c->in, &environdata, sizeof environdata);
+
+			environdata.var[(sizeof environdata.var) - 1] = '\0';
+			if (strchr(environdata.var, '=') != NULL)
+				environ_put(&c->environ, environdata.var);
+			break;
 		default:
 			fatalx("unexpected message");
 		}