tests: add tty bats integration

Add some tests to ensure that we always get a proper console (created
inside the container). This is done by checking that the
/proc/self/fd/[012] "symlinks" are always referencing something in
/dev/pts/*.

This patch is part of the console rewrite patchset.

Signed-off-by: Aleksa Sarai <asarai@suse.de>

tests/integration/tty.bats

@@ -0,0 +1,113 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function setup() {
+	teardown_busybox
+	setup_busybox
+}
+
+function teardown() {
+	teardown_busybox
+}
+
+@test "runc run [tty ptsname]" {
+	# Replace sh script with readlink.
+    sed -i 's|"sh"|"sh", "-c", "for file in /proc/self/fd/[012]; do readlink $file; done"|' config.json
+
+	# run busybox
+	runc run test_busybox
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ /dev/pts/+ ]]
+	[[ ${lines[1]} =~ /dev/pts/+ ]]
+	[[ ${lines[2]} =~ /dev/pts/+ ]]
+}
+
+@test "runc run [tty owner]" {
+	# Replace sh script with stat.
+	sed -i 's/"sh"/"sh", "-c", "stat -c %u:%g $(tty) | tr : \\\\\\\\n"/' config.json
+
+	# run busybox
+	runc run test_busybox
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ 0 ]]
+	# This is set by the default config.json (it corresponds to the standard tty group).
+	[[ ${lines[1]} =~ 5 ]]
+}
+
+@test "runc run [tty owner] ({u,g}id != 0)" {
+	# replace "uid": 0 with "uid": 1000
+	# and do a similar thing for gid.
+	sed -i 's;"uid": 0;"uid": 1000;g' config.json
+	sed -i 's;"gid": 0;"gid": 100;g' config.json
+
+	# Replace sh script with stat.
+	sed -i 's/"sh"/"sh", "-c", "stat -c %u:%g $(tty) | tr : \\\\\\\\n"/' config.json
+
+	# run busybox
+	runc run test_busybox
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ 1000 ]]
+	# This is set by the default config.json (it corresponds to the standard tty group).
+	[[ ${lines[1]} =~ 5 ]]
+}
+
+@test "runc exec [tty ptsname]" {
+	# run busybox detached
+	runc run -d --console-socket $CONSOLE_SOCKET test_busybox
+	[ "$status" -eq 0 ]
+
+	# check state
+	wait_for_container 15 1 test_busybox
+
+	# make sure we're running
+	testcontainer test_busybox running
+
+	# run the exec
+    runc exec test_busybox sh -c 'for file in /proc/self/fd/[012]; do readlink $file; done'
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ /dev/pts/+ ]]
+	[[ ${lines[1]} =~ /dev/pts/+ ]]
+	[[ ${lines[2]} =~ /dev/pts/+ ]]
+}
+
+@test "runc exec [tty owner]" {
+	# run busybox detached
+	runc run -d --console-socket $CONSOLE_SOCKET test_busybox
+	[ "$status" -eq 0 ]
+
+	# check state
+	wait_for_container 15 1 test_busybox
+
+	# make sure we're running
+	testcontainer test_busybox running
+
+	# run the exec
+    runc exec test_busybox sh -c 'stat -c %u:%g $(tty) | tr : \\n'
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ 0 ]]
+	[[ ${lines[1]} =~ 5 ]]
+}
+
+@test "runc exec [tty owner] ({u,g}id != 0)" {
+	# replace "uid": 0 with "uid": 1000
+	# and do a similar thing for gid.
+	sed -i 's;"uid": 0;"uid": 1000;g' config.json
+	sed -i 's;"gid": 0;"gid": 100;g' config.json
+
+	# run busybox detached
+	runc run -d --console-socket $CONSOLE_SOCKET test_busybox
+	[ "$status" -eq 0 ]
+
+	# check state
+	wait_for_container 15 1 test_busybox
+
+	# make sure we're running
+	testcontainer test_busybox running
+
+	# run the exec
+    runc exec test_busybox sh -c 'stat -c %u:%g $(tty) | tr : \\n'
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ 1000 ]]
+	[[ ${lines[1]} =~ 5 ]]
+}