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|
binfalse()
{
$binfalse || return 1 # normalize return value
}
if [ -x /usr/bin/true ]; then
bintrue=/usr/bin/true
elif [ -x /bin/true ]; then
bintrue=/bin/true
else
bintrue=true
fi
if [ -x /usr/bin/false ]; then
binfalse=/usr/bin/false
elif [ -x /bin/false ]; then
binfalse=/bin/false
else
binfalse=true
fi
shopt -s lastpipe
unset foo bar
echo a b c | read foo
echo after 1: foo = $foo
unset tot
declare -i tot
printf "%d\n" 1 2 3 | while read foo; do tot+=$foo; done
echo after 2: tot = $tot
unset bar
echo g h i | bar=7
echo after: $bar
unset foo last
printf "%s\n" a b c | while read foo; do last=$foo; done
echo last = $last
exit 142 | false
echo $? -- ${PIPESTATUS[@]}
true | false | $bintrue
echo $? -- ${PIPESTATUS[@]}
true | $bintrue | false
echo $? -- ${PIPESTATUS[@]}
set -o pipefail
true | $bintrue | false
echo $? -- ${PIPESTATUS[@]}
true | binfalse | true
echo $? -- ${PIPESTATUS[@]}
set +o pipefail
${THIS_SH} ./lastpipe1.sub
echo lastpipe1.sub returns $?
${THIS_SH} ./lastpipe2.sub
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