Bug#883062: XDM could not be stopped
Package: xdm
Version:
Dear maintaner(-s), I've found that XDM could not be stopped.
When I run command
systemctl stop xdm.service
it hungs and XDM gets killed [by systemd] using SIGKILL.
Same hangup occur upon host reboot and termination.
Following piece is a system calls (trace obtained using ``strace'' utility)
from XDM:
rt_sigsuspend([], 8) = ? ERESTARTNOHAND (To be restarted if n
o handler) <11.870653>
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=1, si_uid=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=594,
si_uid=0, si_status=SIGTERM, si_utime=2, si_stime=2} ---
--- SIGCONT {si_signo=SIGCONT, si_code=SI_USER, si_pid=1, si_uid=0} ---
rt_sigreturn({mask=[TERM]}) = 0 <0.000090>
getpid() = 543 <0.000030>
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=1544, ...}) = 0 <0.000048>
getpid() = 543 <0.000017>
write(2</var/log/xdm.log>, "Tue Nov 28 20:11:23 2017 xdm inf"..., 45)
= 45 <0.000033>
write(2</var/log/xdm.log>, "Shutting down\n", 14) = 14 <0.000020>
kill(594, SIGTERM) = 0 <0.000019>
kill(594, SIGCONT) = 0 <0.000017>
kill(564, SIGTERM) = 0 <0.000022>
kill(564, SIGCONT) = 0 <0.000018>
rt_sigreturn({mask=[HUP CHLD]}) = -1 EINTR (Interrupted system
call) <0.000019>
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 <0.000017>
wait4(-1, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGTERM}], WNOHANG, NULL)
= 594 <0.000043>
stat("/etc/X11/xdm/xdm-config", {st_mode=S_IFREG|0644, st_size=1113,
...}) = 0 <0.001980>
stat("/etc/X11/xdm/Xservers", {st_mode=S_IFREG|0644, st_size=1696,
...}) = 0 <0.000755>
stat("/etc/X11/xdm/Xaccess", {st_mode=S_IFREG|0644, st_size=3401,
...}) = 0 <0.000503>
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=1544, ...}) = 0 <0.000036>
getpid() = 543 <0.000037>
write(2</var/log/xdm.log>, "Tue Nov 28 20:11:23 2017 xdm inf"..., 45)
= 45 <0.000037>
write(2</var/log/xdm.log>, "display :0 is being disabled\n", 29) = 29 <0.000019>
Strace was attached immediately before attempt to stop XDM.
Process [564] seems to be an X server.
So, probably this is hangup is a result of bug in the X itself and not in XDM.
Following packages (excerpt from ``dpkg -l'') are installed on the host:
Complete list is in attachement.
--
С уважением, Дунаев Антон.
mailto: duanton@gmail.com
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