On Wed, 2003-02-26 at 13:58, Andreas Schwab wrote:
> "Robert Anderson" <[EMAIL PROTECTED]> writes:
>
> |> I submit for your critique an idea for making the generated sed
> |> commands within config.status be robust to "special" characters
> |> such as the delimiter - which happens to have been chosen as ","
> |> - as well as sed metacharacters '&' and '\'.
> |>
> |> This would be implemented as a small standalone script generated
> |> by config.status in /tmp, but the following gives the idea concisely:
> |>
> |> #!/bin/ash
> |>
> |> _quote_for_sed()
> |> {
> |> echo "$1"| \
>
> Look out for echo meta character.
>
> |> sed -e 's,\\,\\\\,g' | \
> |> sed -e 's,&,\\&,g' | \
> |> sed -e 's,\,,\\\,,g'
> |> }
>
> sed -e 's/[\&,]/\\&/g'
>
> is much faster and works as well.
Yep. Both problems ostensibly fixed below. Can someone get this to
fail using their favorite crappy sh implementation?
#!/bin/ash
_quote_for_sed()
{
cat<<_ACEOF | sed -e 's,[\&,],\\&,g'
$1
_ACEOF
}
_test()
{
if [ "$substvar" = "$var" ]; then
cat<<EOF
pass: $substvar == $var
EOF
else
cat<<EOF
FAIL: $substvar == $var
EOF
fi
}
var='/tmp/file'
substvar=$( echo @var@ | sed -e "s,@var@,`_quote_for_sed $var`," )
_test
var='/tmp/,,file'
substvar=$( echo @var@ | sed -e "s,@var@,`_quote_for_sed $var`," )
_test
var='(&)[].*\~&<>/[EMAIL PROTECTED]|;:"'
substvar=$( echo @var@ | sed -e "s,@var@,`_quote_for_sed $var`," )
_test
var='\1abc\2\\20'
substvar=$( echo @var@ | sed -e "s,@var@,`_quote_for_sed $var`," )
_test
var="'"
substvar=$( echo @var@ | sed -e "s,@var@,`_quote_for_sed $var`," )
_test
Thanks,
Bob
