Here is an installation on a debian sarge machine with a ton of serial
consoles.  /dev/ttyS9 is connected to terra's console, and /dev/ttyS8
is connected to pluto.  Both pluto and terra should be accessible to
members of the group "controllers"

[0 root@mars ~]# mkdir /srv/ttylogs
[0 root@mars ~]# adduser --system --ingroup dialout  --home /srv/ttylogs --no-create-home ttyown 
Adding system user `ttyown'...
Adding new user `ttyown' (103) with group `dialout'.
Not creating home directory.
[0 root@mars ~]# adduser --system  --home /srv/ttylogs --no-create-home ttylog 
Adding system user `ttylog'...
Adding new user `ttylog' (104) with group `nogroup'.
Not creating home directory.
[0 root@mars ~]# addgroup --system controllers
Adding group `controllers' (106)...
Done.
[0 root@mars ~]# adduser ttyown controllers
Adding user `ttyown' to group `controllers'...
Done.
[0 root@mars ~]# adduser admin controllers
Adding user `admin to group `controllers'...
Done.
[0 root@mars ~]# ttylog-conf ttyown ttylog controllers /srv/ttylogs/terra /dev/ttyS9 115200
[0 root@mars ~]# ln -s /srv/ttylogs/terra /service/ttylog-terra
[0 root@mars ~]# cat /etc/minicom/minirc.terra
pu port             /srv/ttylogs/terra/target/device
pu baudrate         115200
pu bits             8
pu parity           N
pu stopbits         1
pu scriptprog       
pu minit            
pu mreset           
[0 root@mars ~]# ttylog-conf ttyown ttylog controllers /srv/ttylogs/pluto /dev/ttyS9 115200
[0 root@mars ~]# ln -s /srv/ttylogs/pluto /service/ttylog-pluto
[0 root@mars ~]# cat /etc/minicom/minirc.pluto
pu port             /srv/ttylogs/pluto/target/device
pu baudrate         115200
pu bits             8
pu parity           N
pu stopbits         1
pu scriptprog       
pu minit            
pu mreset           
[0 root@mars ~]# 


With this done, the admin user can now access the console via minicom:

  minicom terra

and read the logs:

  readttylog --with-timestamps /srv/ttylogs/pluto/log/main/current | tai64nlocal