From: Stéphane Graber <stgraber@ubuntu.com>
Date: Fri, 13 Mar 2015 20:43:16 +0000 (-0400)
Subject: Attempt to fix control tty issues on attach
X-Git-Tag: lxc-1.1.1~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49b8b13d1d61dbffd2c4bb19c03b8a746e11d902;p=thirdparty%2Flxc.git

Attempt to fix control tty issues on attach

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
---

diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index f70e42e8e..faa90fcb9 100644
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -984,6 +984,21 @@ static int attach_child_main(void* data)
 	if (options->gid != (gid_t)-1)
 		new_gid = options->gid;
 
+	/* setup the control tty */
+	if (options->stdin_fd) {
+		if (setsid() < 0) {
+			SYSERROR("unable to setsid");
+			shutdown(ipc_socket, SHUT_RDWR);
+			rexit(-1);
+		}
+
+		if (ioctl(options->stdin_fd, TIOCSCTTY, (char *)NULL) < 0) {
+			SYSERROR("unable to TIOCSTTY");
+			shutdown(ipc_socket, SHUT_RDWR);
+			rexit(-1);
+		}
+	}
+
 	/* try to set the uid/gid combination */
 	if ((new_gid != 0 || options->namespaces & CLONE_NEWUSER)) {
 		if (setgid(new_gid) || setgroups(0, NULL)) {