On Mon, Jul 10, 2023 at 03:24:54PM +0200, Robert Senger wrote:
> Hey, that was me! My full given name *is* Robert'); DROP ...
>
> CONFDIR=/etc/postfix
> POSTMAP=/usr/sbin/postmap
> LOCAL_VIRTUAL_USERS=mysql:${CONFDIR}/virtual_mailboxes.mysql.cf
>
> recipient=$(printf '%s' "$2" | sed 's/[<>]//g')
> username=$(([ ! -z ${LOCAL_VIRTUAL_USERS} ] && ${POSTMAP} -q "${recipient}"
> ${LOCAL_VIRTUAL_USERS}))
This is closer, but note that $(( ... )) is for **arithmetic**
expressions, not command sustitution. You want $( ... ).
--
Viktor.
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