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112efa81f2
`(exit N); exit N'. Otherwise, those many tests could exit with improper exit status when exiting via e.g., a trapped interrupt. Thanks to a report from Bob Proulx.
41 lines
873 B
Bash
Executable File
41 lines
873 B
Bash
Executable File
#!/bin/sh
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# show how to skip an amount that is smaller than the nominal block size.
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# There's a more realistic example in the documentation.
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if test "$VERBOSE" = yes; then
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set -x
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dd --version
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fi
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pwd=`pwd`
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tmp=skip-seek.$$
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trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
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trap '(exit $?); exit' 1 2 13 15
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framework_failure=0
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mkdir $tmp || framework_failure=1
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cd $tmp || framework_failure=1
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if test $framework_failure = 1; then
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echo 'failure in testing framework'
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(exit 1); exit 1
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fi
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fail=0
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echo LA:3456789abcdef > in || fail=1
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(dd bs=1 skip=3 count=0 && dd bs=5) < in > out 2> /dev/null || fail=1
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case `cat out` in
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3456789abcdef) ;;
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*) fail=1 ;;
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esac
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echo LA:3456789abcdef > in || fail=1
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(dd bs=1 skip=3 count=0 && dd bs=5 count=2) < in > out 2> /dev/null || fail=1
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case `cat out` in
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3456789abc) ;;
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*) fail=1 ;;
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esac
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(exit $fail); exit $fail
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