when I start postfix I get this error although it does start it is not sending mail

here is line 73
/etc/init.d/postfix: line 73: [: =: unary operator expected

here is the whole section
start() {
[ "$EUID" != "0" ] && exit 4
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 1
conf_check
# Start daemons.
echo -n $"Starting postfix: "
make_aliasesdb >/dev/null 2>&1
[ -x $CHROOT_UPDATE ] && $CHROOT_UPDATE
/usr/sbin/postfix start 2>/dev/null 1>&2 && success || failure $"$prog start"
RETVAL=$?
[ $RETVAL -eq 0 ] && touch $lockfile
echo
return $RETVAL
}


I have another setup with the same exact code and it is working fine...

check running via bash vs sh maybe. i've had that issue (with custom scripts) in the past.

edit:
try doublequotes around "${NETWORKING}"
-or-
use [[ and ]] around expression

http://www.shellcheck.net

1 members found this post helpful.

Can you show which line is line 73 exactly?

Thanks!
Looks like postfix not sending is unrelated to this error. I set selinux to permissive and restarted postfix still got the error but relay is working as expected. I also ran bash -x postfix but I don't understand the output looks like it just printed the settings. I'll try the double [ I saw that mentioned somewhere else but didn't really explain what that does.

Sorry I meant to put that in OP it is

[ -x $CHROOT_UPDATE ] && $CHROOT_UPDATE


I changed [ ${NETWORKING} = "no" ] && exit 1 to [ "${NETWORKING}" = "no" ] && exit 1 as sudowtf mentioned and that fixed it.

The solution came from this link and also explains why: https://stackoverflow.com/questions/...rator-expected

Use that shellcheck site, it saved me tons of times.

Thanks, changing line 73 to be:


and then:


did it for me on CentOS