#!/usr/bin/env bash
# nbdkit
# Copyright Red Hat
#
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# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of Red Hat nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# Test the data plugin with </dev/urandom[N:M] and $var substitutions

source ./functions.sh
set -e
set -x
set -u

requires_nbdsh_uri
requires test -r /dev/urandom
requires_run

define script <<'EOF'
print ("%d" % h.get_size())
assert h.get_size() == 4*4

# We do not know what the content will be but it must
# be the same 4 bytes repeated 4 times.
buf1 = h.pread (4, 0)
buf2 = h.pread (4, 4)
buf3 = h.pread (4, 8)
buf4 = h.pread (4, 12)

assert buf1 == buf2
assert buf2 == buf3
assert buf3 == buf4
EOF
export script

# Run nbdkit.
nbdkit data ' $rand4*4' rand4=' </dev/random[:4] ' \
       --run ' nbdsh -u "$uri" -c "$script" '
