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#!/bin/sh
# show how to skip an amount that is smaller than the nominal block size.
# There's a more realistic example in the documentation.
if test "$VERBOSE" = yes; then
set -x
dd --version
fi
pwd=`pwd`
tmp=skip-seek.$$
trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
trap '(exit $?); exit' 1 2 13 15
framework_failure=0
mkdir $tmp || framework_failure=1
cd $tmp || framework_failure=1
if test $framework_failure = 1; then
echo 'failure in testing framework'
(exit 1); exit 1
fi
fail=0
echo LA:3456789abcdef > in || fail=1
(dd bs=1 skip=3 count=0 && dd bs=5) < in > out 2> /dev/null || fail=1
case `cat out` in
3456789abcdef) ;;
*) fail=1 ;;
esac
echo LA:3456789abcdef > in || fail=1
(dd bs=1 skip=3 count=0 && dd bs=5 count=2) < in > out 2> /dev/null || fail=1
case `cat out` in
3456789abc) ;;
*) fail=1 ;;
esac
(exit $fail); exit $fail
|
