1 files changed, 58 insertions, 0 deletions
diff --git a/tests/dd/skip-seek-past-dev.sh b/tests/dd/skip-seek-past-dev.sh
new file mode 100755
index 0000000..c24bbb7
--- /dev/null
+++ b/tests/dd/skip-seek-past-dev.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+# test diagnostics are printed immediately when seeking beyond device.
+
+# Copyright (C) 2008-2016 Free Software Foundation, Inc.
+
+# This program 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 3 of the License, or
+# (at your option) any later version.
+
+# This program 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.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ dd
+
+# need write access to local device
+# (even though we don't actually write anything)
+require_root_
+require_local_dir_
+
+get_device_size() {
+  BLOCKDEV=blockdev
+  $BLOCKDEV -V >/dev/null 2>&1 || BLOCKDEV=/sbin/blockdev
+  $BLOCKDEV --getsize64 "$1"
+}
+
+
+# Get path to device the current dir is on.
+# Note df can only get fs size, not device size.
+device=$(df --output=source . | tail -n1) || framework_failure_
+
+dev_size=$(get_device_size "$device") ||
+  skip_ "failed to determine size of $device"
+
+# Don't use shell arithmetic as older versions of dash use longs
+DEV_OFLOW=$(expr $dev_size + 1)
+
+timeout 10 dd bs=1 skip=$DEV_OFLOW count=0 status=noxfer < "$device" 2> err
+test "$?" = "1" || fail=1
+echo "dd: 'standard input': cannot skip: Invalid argument
+0+0 records in
+0+0 records out" > err_ok || framework_failure_
+compare err_ok err || fail=1
+
+timeout 10 dd bs=1 seek=$DEV_OFLOW count=0 status=noxfer > "$device" 2> err
+test "$?" = "1" || fail=1
+echo "dd: 'standard output': cannot seek: Invalid argument
+0+0 records in
+0+0 records out" > err_ok || framework_failure_
+compare err_ok err || fail=1
+
+Exit $fail