close leaking slave fd after setting up pty magic

The fd moves out of scope here anyway, so we should close it properly
instead of leaking it which will tickle down to dpkg maintainer scripts.

Closes: 767774

1 files changed, 40 insertions, 0 deletions

diff --git a/test/integration/test-no-fds-leaked-to-maintainer-scripts b/test/integration/test-no-fds-leaked-to-maintainer-scripts
new file mode 100755
index 000000000..6ed120090
--- /dev/null
+++ b/test/integration/test-no-fds-leaked-to-maintainer-scripts
@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+
+TESTDIR=$(readlink -f $(dirname $0))
+. $TESTDIR/framework
+
+setupenvironment
+configarchitecture 'native'
+configdpkgnoopchroot
+
+setupsimplenativepackage "fdleaks" 'native' '1.0' 'unstable'
+BUILDDIR="incoming/fdleaks-1.0"
+for script in 'preinst' 'postinst' 'prerm' 'postrm'; do
+	echo '#!/bin/sh
+ls -l /proc/self/fd/' > ${BUILDDIR}/debian/$script
+done
+buildpackage "$BUILDDIR" 'unstable' 'main' 'native'
+rm -rf "$BUILDDIR"
+
+setupaptarchive
+
+testsuccess aptget install -y fdleaks
+msgtest 'Check if fds were not' 'leaked'
+if [ "$(grep 'root root' rootdir/tmp/testsuccess.output | wc -l)" = '8' ]; then
+	msgpass
+else
+	echo
+	cat rootdir/tmp/testsuccess.output
+	msgfail
+fi
+
+testsuccess aptget purge -y fdleaks
+msgtest 'Check if fds were not' 'leaked'
+if [ "$(grep 'root root' rootdir/tmp/testsuccess.output | wc -l)" = '12' ]; then
+	msgpass
+else
+	echo
+	cat rootdir/tmp/testsuccess.output
+	msgfail
+fi