add support for running fai inside a screen or tmux session

Makefile

@@ -10,7 +10,7 @@ USRSBIN_SCRIPTS = fai-make-nfsroot fai-setup fcopy ftar install_packages fai-chb
 USRBIN_SCRIPTS = fai-class fai-do-scripts fai-mirror fai-debconf device2grub policy-rc.d.fai ainsl fai-link fai-sed fai-monitor-gui fai-deps fai-mk-configspace
 
 # for syntax checks
-BASH_SCRIPTS = bin/fai bin/fai-cd bin/fai-class bin/fai-debconf bin/fai-do-scripts bin/fai-make-nfsroot bin/fai-mirror bin/fai-setup bin/fai-diskimage bin/fai-statoverride bin/faireboot bin/ftar bin/fai-link bin/fai-sed dev-utils/fai-kvm dev-utils/fai-mk-network examples/simple/basefiles/mk-basefile examples/simple/class/*.sh examples/simple/class/[0-9]* examples/simple/files/etc/rc.local/FAISERVER examples/simple/hooks/* examples/simple/scripts/*/* lib/fai-divert lib/fai-mount-disk lib/fai-savelog lib/fetch-basefile lib/get-boot-info lib/get-config-dir* lib/mkramdisk lib/mount2dir lib/prcopyleft lib/subroutines lib/task_* lib/updatebase lib/dracut/*/* bin/fai-mk-configspace lib/check-cross-arch
+BASH_SCRIPTS = bin/fai bin/fai-cd bin/fai-class bin/fai-debconf bin/fai-do-scripts bin/fai-make-nfsroot bin/fai-mirror bin/fai-setup bin/fai-diskimage bin/fai-statoverride bin/faireboot bin/ftar bin/fai-link bin/fai-sed dev-utils/fai-kvm dev-utils/fai-mk-network examples/simple/basefiles/mk-basefile examples/simple/class/*.sh examples/simple/class/[0-9]* examples/simple/files/etc/rc.local/FAISERVER examples/simple/hooks/* examples/simple/scripts/*/* lib/fai-divert lib/fai-mount-disk lib/fai-savelog lib/fetch-basefile lib/get-boot-info lib/get-config-dir* lib/mkramdisk lib/mount2dir lib/prcopyleft lib/subroutines lib/task_* lib/updatebase lib/dracut/*/* bin/fai-mk-configspace lib/check-cross-arch lib/terminal-wrapper
 SHELL_SCRIPTS = bin/dhclient-fai-script bin/policy-rc.d.fai lib/check_status lib/create_resolv_conf lib/fai-abort lib/fai-disk-info lib/load_keymap_consolechars utils/mkdebmirror
 PERL_SCRIPTS = lib/setup-storage/*.pm bin/ainsl bin/device2grub bin/dhcp-edit bin/fai-chboot bin/fai-deps bin/fai-monitor bin/fai-monitor-gui bin/fai-new-mac bin/fcopy bin/install_packages bin/setup-storage dev-utils/setup-storage_deps-graph.pl examples/simple/tests/Faitest.pm lib/dhclient-perl lib/fai-savelog-ftp
 

conf/NFSROOT

@@ -14,6 +14,7 @@ pxelinux syslinux-common
 ca-certificates # for get-config-dir-https and apt-transport-https
 usbutils pciutils
 ssh
+screen tmux
 netselect
 mdadm
 cryptsetup

conf/systemd/fai.service

@@ -8,7 +8,7 @@ Before=shutdown.target
 [Service]
 Environment=HOME=/root
 WorkingDirectory=-/root
-ExecStart=-/etc/init.d/rcS
+ExecStart=-/usr/lib/fai/terminal-wrapper
 Type=idle
 StandardInput=tty-force
 StandardOutput=inherit

debian/fai-nfsroot.install

@@ -5,6 +5,7 @@ usr/lib/fai/create_resolv_conf
 usr/lib/fai/load_keymap_consolechars
 usr/lib/fai/fai-mount-disk
 usr/lib/fai/task_sysinfo
+usr/lib/fai/terminal-wrapper
 usr/share/fai/dhclient-fai-script
 usr/share/fai/dhclient-fai.conf
 usr/share/fai/udev.patch

doc/fai-guide.txt

@@ -1309,6 +1309,12 @@ menu::
 This enables a user menu for selecting a profile. All files
 +class/*.profile+ are read and a curses based menu will be created.
 
+screen:
+Run FAI inside a `screen(1)` session. The session is called FAI.
+
+tmux:
+Run FAI inside a `tmux(1)` session. The session is called FAI.
+
 reboot::
 Reboot the install client after installation is finished without
 typing RETURN on the console. If this flag is not set, and error.log

lib/terminal-wrapper

@@ -0,0 +1,20 @@
+#! /bin/bash
+
+# This script is part of FAI (Fully Automatic Installation)
+# (c) 2023 by Thomas Lange, lange@debian.org
+
+# start fai directly or inside screen or tmux
+
+. /usr/lib/fai/subroutines
+eval_cmdline
+define_fai_flags
+
+if [ X$flag_screen = X1 ]; then
+    screen -S FAI /etc/init.d/rcS
+    exec /etc/init.d/fai-abort
+elif [ X$flag_tmux = X1 ]; then
+    tmux new-session -s FAI /etc/init.d/rcS
+    exec /etc/init.d/fai-abort
+else
+    exec /etc/init.d/rcS
+fi