Clean up remained xrdp socket files

xrdp_clean_sockets.sh

#!/bin/sh

SOCKDIR=/tmp/.xrdp
SESSIONS=$(cd ${SOCKDIR} ; ls -1 xrdp_* | sed -e 's|[^0-9]||g' | sort -u)

for i in ${SESSIONS}
do
        if [ ! -S ${SOCKDIR}/xrdp_display_${i} ]
        then
                (
                cd ${SOCKDIR}
                rm -f xrdp_chansrv_audio_in_socket_${i} \
                        xrdp_chansrv_audio_out_socket_${i} \
                        xrdp_chansrv_socket_${i} \
                        xrdpapi_${i}
                )
        fi
done

The SESSIONS line can be written like this.

# space after first "("
SESSIONS=$( (cd ${SOCKDIR} ; ls -1 xrdp_*) | sed -e 's|[^0-9]||g' | sort -u)
# actually "( )" surrounding ls and cd is not necessary 
SESSIONS=$(cd ${SOCKDIR} ; ls -1 xrdp_* | sed -e 's|[^0-9]||g' | sort -u)