1 files changed, 70 insertions, 0 deletions
diff --git a/tests/ts/lsfd/mkfds-multiplexing b/tests/ts/lsfd/mkfds-multiplexing
new file mode 100755
index 0000000..8cc7f31
--- /dev/null
+++ b/tests/ts/lsfd/mkfds-multiplexing
@@ -0,0 +1,70 @@
+#!/bin/bash
+#
+# Copyright (C) 2023 Masatake YAMATO <yamato@redhat.com>
+#
+# This file is part of util-linux.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+TS_TOPDIR="${0%/*}/../.."
+TS_DESC="XMODE.m for classical system calls for multiplexing"
+
+. "$TS_TOPDIR"/functions.sh
+ts_init "$*"
+
+ts_check_test_command "$TS_CMD_LSFD"
+ts_check_test_command "$TS_HELPER_MKFDS"
+
+# /proc/${PID}/syscall is rendered in the host side byteorder.
+ts_skip_qemu_user
+
+ts_check_prog "grep"
+
+ts_cd "$TS_OUTDIR"
+
+PID=
+
+for multiplexer in pselect6 select poll ppoll; do
+    ts_init_subtest "${multiplexer}"
+    if ! "$TS_HELPER_MKFDS" -W | grep -q "^$multiplexer\$"; then
+	ts_skip_subtest "the multiplexer ${multiplexer} is not available"
+	continue
+    fi
+
+    {
+	coproc MKFDS { "$TS_HELPER_MKFDS" -w "$multiplexer" multiplexing {10..22}; }
+    } > "$TS_OUTPUT" 2>&1
+
+    if read -r -u "${MKFDS[0]}" PID; then
+	if ! cat /proc/"${PID}"/syscall > /dev/null 2>&1; then
+	    kill -CONT "${PID}"
+	    wait "${MKFDS_PID}"
+	    ts_skip_subtest "cannot open /proc/${PID}/syscall"
+	    continue
+	fi
+	{
+	    "${TS_CMD_LSFD}" -n -o ASSOC,XMODE -p "${PID}" -Q '(FD >= 10) && (FD <= 22)'
+	    echo "[$multiplexer] ASSOC,XMODE: $?"
+
+	    # For debugging
+	    if [[ $("${TS_CMD_LSFD}" -n -o XMODE -p "${PID}" -Q '(FD == 10)') != "r----m" ]]; then
+		cat /proc/"${PID}"/syscall
+	    fi
+
+	    echo DONE >&"${MKFDS[1]}"
+	} >> "$TS_OUTPUT" 2>&1
+    fi
+
+    wait "${MKFDS_PID}"
+    ts_finalize_subtest
+done
+
+ts_finalize