test: Show that smbd does not handle EINTR from open() correctly

Bug: https://bugzilla.samba.org/show_bug.cgi?id=14285
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

3 files changed, 76 insertions, 0 deletions

diff --git a/selftest/knownfail.d/open_eintr b/selftest/knownfail.d/open_eintr
new file mode 100644
index 00000000000..e5b42ed6bcd
--- /dev/null
+++ b/selftest/knownfail.d/open_eintr
@@ -0,0 +1 @@
+samba3.blackbox.open-eintr.*\(simpleserver:local\)
diff --git a/source3/script/tests/test_open_eintr.sh b/source3/script/tests/test_open_eintr.sh
new file mode 100755
index 00000000000..d08f7fcfc23
--- /dev/null
+++ b/source3/script/tests/test_open_eintr.sh
@@ -0,0 +1,66 @@
+#!/bin/bash
+#
+# Test smbd handling when open returns EINTR
+#
+# Copyright (C) 2020 Volker Lendecke
+
+if [ $# -lt 5 ]; then
+    echo Usage: test_open_eintr.sh \
+	 --configfile=SERVERCONFFILE SMBCLIENT SMBCONTROL SERVER SHARE
+exit 1
+fi
+
+CONF=$1; shift 1
+SMBCLIENT=$1; shift 1
+SMBCONTROL=$1; shift 1
+SERVER=$1; shift 1
+SHARE=$1; shift 1
+
+error_inject_conf=$(dirname ${SERVERCONFFILE})/error_inject.conf
+> ${error_inject_conf}
+
+incdir=$(dirname $0)/../../../testprogs/blackbox
+. $incdir/subunit.sh
+
+failed=0
+
+rm -f smbclient-stdin smbclient-stdout smbclient-stderr
+mkfifo smbclient-stdin smbclient-stdout smbclient-stderr
+
+CLI_FORCE_INTERACTIVE=1; export CLI_FORCE_INTERACTIVE
+
+${SMBCLIENT} //${SERVER}/${SHARE} ${CONF} -U${USER}%${PASSWORD} \
+	     < smbclient-stdin > smbclient-stdout 2>smbclient-stderr &
+CLIENT_PID=$!
+
+sleep 1
+
+exec 100>smbclient-stdin 101<smbclient-stdout 102<smbclient-stderr
+
+# consume the smbclient startup messages
+head -n 1 <&101
+head -n 1 <&102
+
+echo "error_inject:open = EINTR" > ${error_inject_conf}
+${SMBCONTROL} ${CONF} 0 reload-config
+
+sleep 1
+> ${error_inject_conf}
+
+echo 'get badnames/blank.txt -' >&100
+
+sleep 1
+
+> ${error_inject_conf}
+${SMBCONTROL} ${CONF} 0 reload-config
+
+head -n 1 <&102 | grep 'getting file' > /dev/null
+GREP_RET=$?
+
+kill ${CLIENT_PID}
+rm -f smbclient-stdin smbclient-stdout smbclient-stderr
+
+testit "Verify that we could get the file" \
+       test $GREP_RET -eq 0 || failed=$(expr $failed + 1)
+
+testok $0 $failed
diff --git a/source3/selftest/tests.py b/source3/selftest/tests.py
index d486e40c5a7..6060cec49c3 100755
--- a/source3/selftest/tests.py
+++ b/source3/selftest/tests.py
@@ -814,6 +814,15 @@ plantestsuite("samba3.blackbox.close-denied-share", "simpleserver:local",
                '$SERVER_IP',
                "tmp"])
 
+plantestsuite("samba3.blackbox.open-eintr", "simpleserver:local",
+              [os.path.join(samba3srcdir,
+                            "script/tests/test_open_eintr.sh"),
+               configuration,
+               os.path.join(bindir(), "smbclient"),
+               os.path.join(bindir(), "smbcontrol"),
+               '$SERVER_IP',
+               "error_inject"])
+
 plantestsuite("samba3.blackbox.net_tdb", "simpleserver:local",
               [os.path.join(samba3srcdir, "script/tests/test_net_tdb.sh"),
                smbclient3, '$SERVER', 'tmp', '$USERNAME', '$PASSWORD',