diff options
Diffstat (limited to 'tests/dd')
-rwxr-xr-x | tests/dd/no-allocate.sh | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tests/dd/no-allocate.sh b/tests/dd/no-allocate.sh new file mode 100755 index 000000000..e45dd5cf9 --- /dev/null +++ b/tests/dd/no-allocate.sh @@ -0,0 +1,53 @@ +#!/bin/sh +# make sure that dd doesn't allocate memory unnecessarily + +# Copyright (C) 2013 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 +require_ulimit_ + +# count and skip is zero, we don't need to allocate memory +(ulimit -v 20000; dd bs=30M count=0) || fail=1 +(ulimit -v 20000; dd ibs=30M count=0) || fail=1 +(ulimit -v 20000; dd obs=30M count=0) || fail=1 + + +# Use a fifo for which seek fails, but read does not +if mkfifo tape; then + # for non seekable output we need to allocate buffer when needed + echo 1 > tape& + (ulimit -v 20000; dd bs=30M skip=1 count=0 if=tape) && fail=1 + + echo 1 > tape& + (ulimit -v 20000; dd ibs=30M skip=1 count=0 if=tape) && fail=1 + + echo 1 > tape& + (ulimit -v 20000; dd obs=30M skip=1 count=0 if=tape) || fail=1 + + + # for non seekable output we need to allocate buffer when needed + echo 1 > tape& + (ulimit -v 20000; dd bs=30M seek=1 count=0 of=tape) && fail=1 + + echo 1 > tape& + (ulimit -v 20000; dd obs=30M seek=1 count=0 of=tape) && fail=1 + + echo 1 > tape& + (ulimit -v 20000; dd ibs=30M seek=1 count=0 of=tape) || fail=1 +fi + +Exit $fail |