[CRIU] [PATCH v2] criu: tty: pick only master as a control terminal

[Dmitry Safonov]

tty_find_restoring_task will prepare control terminal (by tcsetpgrp)
only if tty is master.
By a chance it's possible to pick slave terminal as a control, which
will refrain restoring control terminal.

https://jira.sw.ru/browse/PSBM-42093

Signed-off-by: Dmitry Safonov <dsafonov at odin.com>
---
 tty.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tty.c b/tty.c
index 1286742..a5338d2 100644
--- a/tty.c
+++ b/tty.c
@@ -1185,6 +1185,9 @@ int tty_setup_slavery(void)
 		    info->driver->type == TTY_TYPE__CTTY)
 			continue;
 
+		if (!tty_is_master(info))
+			continue;
+
 		info->ctl_tty = info;
 		pr_debug("ctl tty leader %x\n", info->tfe->id);
 		peer = info;
-- 
2.6.3