can't get tmux to start properly via systemd

Dieter@be · 2015-11-02 02:22:20

i'm trying to follow https://wiki.archlinux.org/index.php/Tm … ialization
so i have :

~ ❯❯❯ cat /etc/systemd/system/tmux@dieter.service
[Unit]
Description=Start tmux in detached session

[Service]
Type=forking
User=dieter
ExecStart=/usr/bin/tmux new-session -s %u -d
ExecStop=/usr/bin/tmux kill-session -t %u

[Install]
WantedBy=multi-user.target

this seems to start tmux, but i can't actually use it:

~ ❯❯❯ ps aux | grep tmux                                                                                                                                                                     ⏎
dieter     538  0.0  0.0  21824  2612 ?        Ss   11:52   0:00 /usr/bin/tmux new-session -s dieter -d
dieter   16761  0.0  0.0  10732  2312 pts/1    S+   21:15   0:00 grep --color=auto tmux
~ ❯❯❯ tmux ls
error connecting to /tmp/dieter/tmux-1011/default (No such file or directory)
~ ❯❯❯ ls -alh /tmp/dieter/tmux-1011
total 0
drwx------ 2 dieter dieter  40 Nov  1 11:52 .
drwx------ 7 dieter dieter 140 Nov  1 11:52 ..

interestingly, i can just invoke the same command manually and then it does seem to work:

~ ❯❯❯ /usr/bin/tmux new-session -s dieter -d
~ ❯❯❯ ps aux | grep tmux
dieter     538  0.0  0.0  21824  2612 ?        Ss   11:52   0:00 /usr/bin/tmux new-session -s dieter -d
dieter   16839  0.0  0.0  21828  2604 ?        Ss   21:17   0:00 /usr/bin/tmux new-session -s dieter -d
dieter   16854  0.0  0.0  10732  2368 pts/1    S+   21:17   0:00 grep --color=auto tmux
~ ❯❯❯ ls -alh /tmp/dieter/tmux-1011
total 0
drwx------ 2 dieter dieter  60 Nov  1 21:17 .
drwx------ 7 dieter dieter 140 Nov  1 20:56 ..
srw-rw---- 1 dieter dieter   0 Nov  1 21:17 default
~ ❯❯❯ tmux -ls
tmux: unknown option -- s
usage: tmux [-2CluvV] [-c shell-command] [-f file] [-L socket-name]
            [-S socket-path] [command [flags]]
~ ❯❯❯ tmux ls                                                                                                                                                                                ⏎
dieter: 1 windows (created Sun Nov  1 21:17:25 2015) [191x56]

so it looks like when system tries to run it during boot, it's unable to create the default file in /tmp/dieter/tmux-10111 (however it does succeed in creating the directory, weirdly enough?)

Dieter@be · 2015-11-02 02:57:56

i tried removing the global unit and instead doing it on user level:

~ ❯❯❯ cat .config/systemd/user/tmux.service
[Unit]
Description=Start tmux in detached session

[Service]
Type=forking
ExecStart=/usr/bin/tmux new-session -s %u -d
ExecStop=/usr/bin/tmux kill-session -t %u

[Install]
WantedBy=default.target

~ ❯❯❯ ls -alh .config/systemd/user/default.target.wants
total 8.0K
drwxr-xr-x 2 dieter dieter 4.0K Nov  1 21:53 .
drwxr-xr-x 4 dieter dieter 4.0K Nov  1 21:53 ..
lrwxrwxrwx 1 dieter dieter   46 Nov  1 21:53 tmux.service -> /home/dieter/.config/systemd/user/tmux.service
~
~ ❯❯❯ ps aux | grep tmux                                                                                     ⏎
dieter     699  0.0  0.0  21824  2612 ?        Ss   21:54   0:00 /usr/bin/tmux new-session -s dieter -d
dieter    2948  0.0  0.0  10732  2252 pts/3    S+   21:57   0:00 grep --color=auto tmux
~ ❯❯❯

but same problem:

~ ❯❯❯ tmux ls                                                                                                ⏎
error connecting to /tmp/dieter/tmux-1011/default (No such file or directory)
~ ❯❯❯ ls -alh /tmp/dieter/tmux-1011
total 0
drwx------ 2 dieter dieter  40 Nov  1 21:54 .
drwx------ 6 dieter dieter 120 Nov  1 21:54 ..

ukhippo · 2015-11-03 15:58:06

Where are you setting the temp dir to “/tmp/dieter”?
Note systemd units do not create a login shell, so consequently they do not read any startup scripts (e.g. /etc/profile, .bashrc). See systemd.exec man page for list of environment variables that are available.
You'll probably find there is a “/tmp/tmux-1011” directory, which was created by the tmux started by the systemd unit, as the default temp dir is of course “/tmp”.

1) You can use the -S option to tmux commands to specify the full path of the socket. E.g.

tmux -S /tmp/tmux-1011/default ls

Or 2) set TMUX_TMPDIR to /tmp wherever you set TMPDIR (TMUX_TMPDIR overrides TMPDIR)

Or 3) try adding the following lines to the [Service] section:

Environment=TMPDIR=/tmp/%u
ExecStartPre=/usr/bin/mkdir -p -m 700 ${TMPDIR}

Dieter@be · 2015-11-03 17:22:58

hmm i'm using zprezto which creates a $TMPDIR variable in .zprofile (see https://github.com/sorin-ionescu/prezto … ofile#L70), $LOGNAME is set to `dieter` so that checks out.
a bunch of the modules rely on $TMPDIR being set, though i don't think they actually care what dir $TMPDIR is set to.
you're right btw, /tmp/tmux-1011 exists and has the default symlink in it.

i'm gonna try your 3rd solution, i want to standardize on using the same tmp dir everywhere.
thanks!

Dieter@be · 2015-11-03 17:32:22

it works, but now the only problem is `systemctl status tmux@dieter.service` reports failure, even though it seems to work fine :?

~/.c/s/user ❯❯❯ cat tmux.service
[Unit]
Description=Start tmux in detached session

[Service]
Type=forking
Environment=TMPDIR=/tmp/%u
ExecStartPre=/usr/bin/mkdir -p -m 700 ${TMPDIR}
ExecStart=/usr/bin/tmux new-session -s %u -d
ExecStop=/usr/bin/tmux kill-session -t %u

[Install]
WantedBy=default.target

~/.c/s/user ❯❯❯ systemctl status tmux@dieter.service
● tmux@dieter.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
~/.c/s/user ❯❯❯ journalctl -b | grep tmux                                                                                                                                                    ⏎
Nov 03 12:27:02 dieter-m6800 systemd[672]: Starting Start tmux in detached session...
Nov 03 12:27:03 dieter-m6800 systemd[672]: Started Start tmux in detached session.
~/.c/s/user ❯❯❯ ps aux | grep tmux
dieter     684  0.0  0.0  21824  2640 ?        Ss   12:27   0:00 /usr/bin/tmux new-session -s dieter -d
dieter    3249  0.0  0.0  10732  2372 pts/2    S+   12:30   0:00 grep --color=auto tmux
~/.c/s/user ❯❯❯ ls -alh /tmp/dieter/tmux-1011/default
srw-rw---- 1 dieter dieter 0 Nov  3 12:27 /tmp/dieter/tmux-1011/default
~/.c/s/user ❯❯❯ tmux ls
dieter: 1 windows (created Tue Nov  3 12:27:03 2015) [80x23]
~/.c/s/user ❯❯❯

ukhippo · 2015-11-03 21:40:31

Shouldn't you be using:

systemctl --user status tmux@dieter

(From the “WantedBy” I guess you're using a user service, not a system one)

Dieter@be · 2015-11-03 22:24:06

good point. looks the same though

~ ❯❯❯ systemctl status tmux@dieter.service
● tmux@dieter.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
~ ❯❯❯ systemctl --user status tmux@dieter.service                                                                                                                                            ⏎
● tmux@dieter.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
~ ❯❯❯ systemctl --user status tmux@dieter                                                                                                                                                    ⏎
● tmux@dieter.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
~ ❯❯❯                                                                                                                                                                                        ⏎

ukhippo · 2015-11-04 11:19:37

Sorry, I just noticed you called it “tmux.service”, NOT “tmux@dieter.service”
So you just need to do

systemctl --user tmux

Arch Linux

#1 2015-11-02 02:22:20

can't get tmux to start properly via systemd

#2 2015-11-02 02:57:56

Re: can't get tmux to start properly via systemd

#3 2015-11-03 15:58:06

Re: can't get tmux to start properly via systemd

#4 2015-11-03 17:22:58

Re: can't get tmux to start properly via systemd

#5 2015-11-03 17:32:22

Re: can't get tmux to start properly via systemd

#6 2015-11-03 21:40:31

Re: can't get tmux to start properly via systemd

#7 2015-11-03 22:24:06

Re: can't get tmux to start properly via systemd

#8 2015-11-04 11:19:37

Re: can't get tmux to start properly via systemd

Board footer