I'm using pam_exec to do some root tasks. They take some time, and I'd like to tell the user to wait a moment.
I'm doing the tasks there, and not later, because I need:
- Root permissions
- To rsync the home files from a server BEFORE anything gets loaded on the desktop
My problem is: I can't show a window displaying anything. i'm loading this script from pam_exec to test whether this is a $DISPLAY issue or a user issue:
#!/bin/bash
case "$PAM_TYPE" in
'open_session')
echo Plain exec &> /tmp/pamexec_output
yad &>> /tmp/pamexec_output
echo Set display &>> /tmp/pamexec_output
DISPLAY=:0 yad &>> /tmp/pamexec_output
echo Set user lightdm &>> /tmp/pamexec_output
sudo -u lightdm yad &>> /tmp/pamexec_output
echo Set user $PAM_USER &>> /tmp/pamexec_output
sudo -u $PAM_USER yad &>> /tmp/pamexec_output
echo Set user lightdm and display &>> /tmp/pamexec_output
DISPLAY=:0 sudo -u lightdm yad &>> /tmp/pamexec_output
echo Set user $PAM_USER and display &>> /tmp/pamexec_output
DISPLAY=:0 sudo -u $PAM_USER yad &>> /tmp/pamexec_output
echo PS AUX &>> /tmp/pamexec_output
ps aux &>> /tmp/pamexec_output
;;
esac
I couldn't get my answer No windows are being shown, and the output:
Plain exec
No protocol specified
No protocol specified
(yad:25314): Gtk-WARNING **: cannot open display: :0
Set display
No protocol specified
No protocol specified
(yad:25317): Gtk-WARNING **: cannot open display: :0
Set user lightdm
No protocol specified
No protocol specified
(yad:25321): Gtk-WARNING **: cannot open display: :0
Set user jorge.suarez
No protocol specified
No protocol specified
(yad:25325): Gtk-WARNING **: cannot open display: :0
Set user lightdm and display
No protocol specified
No protocol specified
(yad:25328): Gtk-WARNING **: cannot open display: :0
Set user jorge.suarez and display
No protocol specified
No protocol specified
(yad:25331): Gtk-WARNING **: cannot open display: :0
As a bonus, here is the final output, from ps aux. Maybe that could help:
PS AUX
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.2 26684 2488 ? Ss Jan24 0:01 /sbin/init
root 2 0.0 0.0 0 0 ? S Jan24 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S Jan24 0:00 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S Jan24 0:00 [kworker/u:0]
root 6 0.0 0.0 0 0 ? S Jan24 0:00 [migration/0]
root 7 0.0 0.0 0 0 ? S Jan24 0:00 [watchdog/0]
root 8 0.0 0.0 0 0 ? S< Jan24 0:00 [cpuset]
root 9 0.0 0.0 0 0 ? S< Jan24 0:00 [khelper]
root 10 0.0 0.0 0 0 ? S Jan24 0:00 [kdevtmpfs]
root 11 0.0 0.0 0 0 ? S< Jan24 0:00 [netns]
root 12 0.0 0.0 0 0 ? S Jan24 0:00 [sync_supers]
root 13 0.0 0.0 0 0 ? S Jan24 0:00 [bdi-default]
root 14 0.0 0.0 0 0 ? S< Jan24 0:00 [kintegrityd]
root 15 0.0 0.0 0 0 ? S< Jan24 0:00 [kblockd]
root 16 0.0 0.0 0 0 ? S< Jan24 0:00 [ata_sff]
root 17 0.0 0.0 0 0 ? S Jan24 0:00 [khubd]
root 18 0.0 0.0 0 0 ? S< Jan24 0:00 [md]
root 21 0.0 0.0 0 0 ? S Jan24 0:00 [khungtaskd]
root 22 0.0 0.0 0 0 ? S Jan24 0:00 [kswapd0]
root 23 0.0 0.0 0 0 ? SN Jan24 0:00 [ksmd]
root 24 0.0 0.0 0 0 ? SN Jan24 0:00 [khugepaged]
root 25 0.0 0.0 0 0 ? S Jan24 0:00 [fsnotify_mark]
root 26 0.0 0.0 0 0 ? S Jan24 0:00 [ecryptfs-kthrea]
root 27 0.0 0.0 0 0 ? S< Jan24 0:00 [crypto]
root 35 0.0 0.0 0 0 ? S< Jan24 0:00 [kthrotld]
root 36 0.0 0.0 0 0 ? S Jan24 0:00 [scsi_eh_0]
root 37 0.0 0.0 0 0 ? S Jan24 0:08 [scsi_eh_1]
root 38 0.0 0.0 0 0 ? S Jan24 0:00 [kworker/u:2]
root 59 0.0 0.0 0 0 ? S< Jan24 0:00 [devfreq_wq]
root 206 0.0 0.0 0 0 ? S Jan24 0:02 [jbd2/vda5-8]
root 207 0.0 0.0 0 0 ? S< Jan24 0:00 [ext4-dio-unwrit]
root 227 0.0 0.1 30844 1256 ? S Jan24 0:00 mountall --daemon
root 302 0.0 0.0 17224 640 ? S Jan24 0:00 upstart-udev-bridge --daemon
root 305 0.0 0.2 24524 2172 ? Ss Jan24 0:00 /sbin/udevd --daemon
root 431 0.0 0.0 0 0 ? S< Jan24 0:00 [kpsmoused]
root 504 0.0 0.1 19192 1032 ? Ss Jan24 0:00 rpcbind -w
root 513 0.0 0.0 0 0 ? S Jan24 0:00 [jbd2/vda6-8]
root 514 0.0 0.0 0 0 ? S< Jan24 0:00 [ext4-dio-unwrit]
root 532 0.0 0.0 15180 404 ? S Jan24 0:00 upstart-socket-bridge --daemon
root 570 0.0 0.0 0 0 ? S Jan24 0:00 [jbd2/vda7-8]
root 573 0.0 0.0 0 0 ? S< Jan24 0:00 [ext4-dio-unwrit]
root 655 0.0 0.0 0 0 ? S< Jan24 0:00 [rpciod]
root 658 0.0 0.0 0 0 ? S< Jan24 0:00 [nfsiod]
root 669 0.0 0.2 49948 2716 ? Ss Jan24 0:00 /usr/sbin/sshd -D
102 679 0.0 0.2 27184 2536 ? Ss Jan24 0:17 dbus-daemon --system --fork --activation=upstart
root 709 0.0 0.3 79036 3096 ? Ss Jan24 0:00 /usr/sbin/modem-manager
root 717 0.0 0.1 21180 1692 ? Ss Jan24 0:00 /usr/sbin/bluetoothd
syslog 733 0.0 0.1 249464 1404 ? Sl Jan24 0:02 rsyslogd -c5
root 738 0.0 0.5 229848 5260 ? Ssl Jan24 0:05 NetworkManager
root 746 0.0 0.0 0 0 ? S< Jan24 0:00 [krfcommd]
root 756 0.0 0.6 188336 5844 ? Sl Jan24 0:23 /usr/lib/policykit-1/polkitd --no-debug
statd 773 0.0 0.1 21496 1312 ? Ss Jan24 0:00 rpc.statd -L
avahi 780 0.0 0.1 34396 1716 ? S Jan24 0:00 avahi-daemon: registering [ctdeskxyy.local]
avahi 781 0.0 0.0 34268 472 ? S Jan24 0:00 avahi-daemon: chroot helper
root 787 0.0 0.1 7256 1508 ? S Jan24 0:00 /sbin/dhclient -d -4 -sf /usr/lib/NetworkManager/nm-dhcp-client.action -pf /var/run/sendsigs.omit.d/network-manager.dhclient-eth0.pid -lf /var/lib/dhcp/dhclient-05584152-142d-425d-b5b9-1e63697e0637-eth0.lease -cf /var/run/nm-dhclient-eth0.conf eth0
colord 808 0.0 1.2 491876 11588 ? Sl Jan24 0:01 /usr/lib/x86_64-linux-gnu/colord/colord
root 938 0.0 0.0 19980 932 tty4 Ss+ Jan24 0:00 /sbin/getty -8 38400 tty4
root 948 0.0 0.0 19980 940 tty5 Ss+ Jan24 0:00 /sbin/getty -8 38400 tty5
root 961 0.0 0.2 69768 1904 tty3 Ss Jan24 0:00 /bin/login --
root 964 0.0 0.0 19980 936 tty6 Ss+ Jan24 0:00 /sbin/getty -8 38400 tty6
root 983 0.0 0.0 4452 812 ? Ss Jan24 0:00 acpid -c /etc/acpi/events -s /var/run/acpid.socket
root 984 0.0 0.1 19104 1024 ? Ss Jan24 0:00 cron
daemon 985 0.0 0.0 16900 372 ? Ss Jan24 0:00 atd
root 991 0.0 0.3 262560 3396 ? Ssl Jan24 0:01 lightdm
whoopsie 993 0.0 0.5 202176 5024 ? Ssl Jan24 0:01 whoopsie
nobody 1001 0.0 0.1 33016 1252 ? S Jan24 0:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/sendsigs.omit.d/network-manager.dnsmasq.pid --listen-address=127.0.0.1 --conf-file=/var/run/nm-dns-dnsmasq.conf --cache-size=0 --proxy-dnssec
root 1023 0.0 0.1 701376 1192 ? Ssl Jan24 0:00 /usr/sbin/nscd
nslcd 1111 0.0 0.2 443796 1916 ? Ssl Jan24 0:00 /usr/sbin/nslcd
root 1254 0.0 0.4 586496 4152 ? Sl Jan24 0:08 /usr/sbin/console-kit-daemon --no-daemon
root 1362 0.0 0.0 0 0 ? S Jan24 0:01 [flush-253:0]
root 1534 0.0 0.2 76052 2032 tty1 Ss Jan24 0:00 /bin/login --
root 1536 0.0 0.4 219940 4272 ? Sl Jan24 0:01 /usr/lib/upower/upowerd
rtkit 1567 0.0 0.1 160644 1136 ? SNl Jan24 0:00 /usr/lib/rtkit/rtkit-daemon
1000 1782 0.0 0.4 19556 4676 tty1 S Jan24 0:00 -bash
root 1930 0.0 0.2 66712 1904 tty1 S Jan24 0:00 sudo su
root 1931 0.0 0.1 66472 1816 tty1 S Jan24 0:00 su
root 1941 0.0 0.2 17260 2324 tty1 S+ Jan24 0:01 bash
root 1965 0.0 0.0 0 0 ? S Jan24 0:00 [lockd]
root 2505 0.0 0.3 193524 3628 ? Sl Jan24 0:01 /usr/lib/udisks/udisks-daemon
root 2506 0.0 0.0 45512 804 ? S Jan24 0:00 udisks-daemon: not polling any devices
root 5436 0.0 0.4 98476 4256 ? Ss 08:01 0:00 /usr/sbin/cupsd -F
root 11778 0.0 0.0 0 0 ? S< 08:01 0:00 [xfs_mru_cache]
root 11779 0.0 0.0 0 0 ? S< 08:01 0:00 [xfslogd]
root 11780 0.0 0.0 0 0 ? S< 08:01 0:00 [xfsdatad]
root 11781 0.0 0.0 0 0 ? S< 08:01 0:00 [xfsconvertd]
root 11784 0.0 0.0 0 0 ? S 08:01 0:00 [jfsIO]
root 11785 0.0 0.0 0 0 ? S 08:01 0:00 [jfsCommit]
root 11786 0.0 0.0 0 0 ? S 08:01 0:00 [jfsSync]
root 13718 0.0 0.0 0 0 ? Z Jan24 0:00 [lightdm] <defunct>
root 14197 0.0 0.1 24520 1640 ? S 08:03 0:00 /sbin/udevd --daemon
root 14198 0.0 0.0 0 0 ? S< 08:03 0:00 [iprt]
root 16911 0.0 0.2 69768 1904 tty2 Ss Jan24 0:00 /bin/login --
root 18750 0.0 0.3 124052 3712 ? Sl 09:12 0:00 /usr/lib/accountsservice/accounts-daemon
root 21715 0.0 0.0 0 0 ? Z 09:20 0:00 [lightdm] <defunct>
4004 23593 0.0 0.3 207504 3592 ? Sl 09:35 0:00 /usr/lib/deja-dup/deja-dup/deja-dup-monitor
root 24087 0.0 0.0 0 0 ? S 09:42 0:00 [kworker/0:1]
root 24355 0.0 0.0 0 0 ? S 09:47 0:00 [kworker/0:2]
root 24581 0.1 2.6 122056 24912 ? SN 09:48 0:00 /usr/bin/python /usr/sbin/aptd
root 25026 0.1 0.0 0 0 ? S 09:52 0:00 [kworker/0:0]
root 25134 1.8 2.6 148396 25280 tty7 Ss+ 09:53 0:00 /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
root 25226 0.0 0.3 155028 3136 ? Sl 09:53 0:00 lightdm --session-child 12 385
lightdm 25258 0.1 0.5 344020 5200 ? S<l 09:53 0:00 /usr/bin/pulseaudio --start --log-target=syslog
lightdm 25263 0.0 0.3 95984 3240 ? S 09:53 0:00 /usr/lib/pulseaudio/pulse/gconf-helper
root 25313 0.0 0.1 16516 1376 ? Ss 09:54 0:00 /bin/bash /usr/local/lib/puppet-files/gestion-sesiones.sh log=/tmp/cosaaaa
root 25334 0.0 0.1 14144 1020 ? R 09:54 0:00 ps aux
4004 26833 0.0 0.5 362740 5676 ? S<l Jan24 0:01 /usr/bin/pulseaudio --start --log-target=syslog
4004 26836 0.0 0.3 95968 3256 ? S Jan24 0:00 /usr/lib/pulseaudio/pulse/gconf-helper
root 28396 0.0 0.0 0 0 ? Z Jan24 0:00 [lightdm] <defunct>
4004 29073 0.0 0.4 19536 4660 tty2 S+ Jan24 0:00 -bash
4004 29256 0.0 0.4 19488 4468 tty3 S+ Jan24 0:00 -bash
Another interesting finding. This script:
#!/bin/bash
case "$PAM_TYPE" in
'open_session')
(
sleep 5
yad &> /tmp/pam_output
) &
;;
esac
It works, but the window is being showed way after the desktop is loaded. So that won't help.
It also works at logout, no problem there.
Any ideas on how to solve this problem?
