On Mon, 23 Mar 2020 17:19:42 -0400 (EDT) Wietse Venema <wie...@porcupine.org> wrote:
> Corrected code follows (missing do/done). > > Save to file, chmod +x name-of-file, don't run this script from > cron. > > It needs to be started at boot time, or before you make a VPN > connection. > > #!/bin/sh > > while : > do > ifconfig xxx | egrep 'UP|DOWN' > sleep 2 > done | while read status > do > case "$status" in > *UP*) if [ "$prev" -ne up ] > then > prev=up > postconf -X defer_transports > postfix reload > fi;; > *) if [ "$prev" -ne down ] > then > prev=down > postconf defer_transports=smtp > postfix reload > fi;; > esac > done > > Wietse > Hi, Sorry to bring this up after a while, but I have been trying this code, but seem to hit a syntax error: line 10: [: : integer expression expected Line10: is the following line: *UP*) if [ "$prev" -ne up ] Any help? Many thanks, Ranjan
