/etc/X11/xdm/Xwilling is in xdm 1:1.1.11-1.
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 | #!/bin/sh
#
# The output of this script is displayed in the chooser window.
# (instead of "Willing to manage")
load="`uptime|sed -e 's/^.*load[^0-9]*//'`"
nrusers="`who|cut -c 1-8|sort -u|wc -l|sed 's/^[ ]*//'`"
s=""; [ "$nrusers" != 1 ] && s=s
echo "${nrusers} user${s}, load: ${load}"
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