/usr/bin/checkmail is in nas-bin 1.9.4-4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #!/bin/sh
#
# Plays an audio file when new mail is received. To hook this into
# xbiff, set the following resource:
#
# xbiff*checkCommand: checkmail
#
# $NCDId: @(#)checkmail,v 1.1 1994/01/18 20:07:50 greg Exp $
maildrop=/usr/spool/mail/$USER # user's mail drop
mailstat=$HOME/.mailstat # file to hold the previous mail drop size
mailsound=$HOME/.mailsound # audio file to play when there's new mail
# get the previous mail drop size
if [ -f $mailstat ]; then previous=`cat $mailstat`; else previous=0; fi
# get the current mail drop size and save it
current=`wc $maildrop`; echo $current > $mailstat
if [ "$current" -eq "$previous" ]; then exit 1; fi # nothing has changed
if [ "$current" -lt "$previous" ]; then exit 2; fi # mail's been removed
playbucket $mailsound & exit 0 # new mail
|