need some help with the bash script 2 | Project Zomboid | Page 1

remote dome Dec 11, 2023, 2:49 PM

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I'm writing a script to manage a server with linux. The script should include a notification system via in-game chat. This will work based on rcon servermsg. Here are some problems with the servermsg command:

rcon -c /usr/local/etc/rcon.yaml "servermsg test1"
test1 appears in the chat and on the screen

rcon -c /usr/local/etc/rcon.yaml "servermsg "test1""
rcon -c /usr/local/etc/rcon.yaml 'servermsg test1'
rcon -c /usr/local/etc/rcon.yaml 'servermsg "test1"'
rcon -c /usr/local/etc/rcon.yaml 'servermsg 'test1''
test1 appears

rcon -c /usr/local/etc/rcon.yaml "servermsg test1 test2"
rcon -c /usr/local/etc/rcon.yaml 'servermsg test1 test2'
rcon -c /usr/local/etc/rcon.yaml "servermsg 'test1 test2'"
nothing is displayed in chat or on the screen, sending fails

rcon -c /usr/local/etc/rcon.yaml "servermsg "test1 test2""
rcon -c /usr/local/etc/rcon.yaml 'servermsg 'test1 test2''
only test1 appears

rcon -c /usr/local/etc/rcon.yaml 'servermsg "test1 test2"'
test1 test2 appear

While you might suggest to write some direct notifications using the last option, I would like to use variables, but in bash you can't use a variable by placing it inside single quotes '_'. What should I do in this case? Can I expect the servermsg command to be improved? The quit or startrain commands, for example, work without having to include them in quotes.

dim radish Dec 11, 2023, 4:22 PM

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remote dome I'm writing a script to manage a server with linux. The script should include a ...

How about trying something along the lines of:

rcon -c /usr/local/etc/rcon.yaml "servermsg \"test1 test2\""

Not sure 'bout linux or rcon, but \ is often seen as an escape character

remote dome Dec 11, 2023, 4:24 PM

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dim radish How about trying something along the lines of: ```bash rcon -c /usr/local/etc/rc...

doesn't work

dim radish Dec 11, 2023, 4:51 PM

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I would like to use variables, but in bash you can't use a variable by placing it inside single quotes
Can variables just be "appended" to strings?
like

WelcomeMessage="test1 test2";
rcon -c /usr/local/etc/rcon.yaml 'servermsg "'$WelcomeMessage'"';

Since I'd assume you used something along the lines of this in the escape character test?

WelcomeMessage="test1 test2";
rcon -c /usr/local/etc/rcon.yaml "servermsg \"${WelcomeMessage}\"";

but yeah, if neither work I have no clue how to "work around" that, aside of potentially setting the variable before usage for each message like this:

WelcomeMessage='servermsg "test1 test2"';
rcon -c /usr/local/etc/rcon.yaml $WelcomeMessage
#or...
WelcomeMessage="test1 test2";
MyCommand='servermsg "'$WelcomeMessage'"';

#followed by
rcon -c /usr/local/etc/rcon.yaml "${MyCommand}"

Wish you good luck, nevertheless!

echo aurora Dec 11, 2023, 5:31 PM

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remote dome I'm writing a script to manage a server with linux. The script should include a ...

it seems to me you should build your string and then pipe it as a single argument into your rcon yaml? something like echo servermsg %variable | rcon -c /usr/local/etc/rcon.yaml

remote dome Dec 11, 2023, 5:45 PM

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rcon -c /usr/local/etc/rcon.yaml 'servermsg "$WelcomeMessage"';
No, it won't work, it will show $WelcomeMessage

remote dome Dec 11, 2023, 5:54 PM

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echo aurora it seems to me you should build your string and then pipe it as a single argumen...

I tested it before. Maybe I do something wrong, but in this case:
MSG="test1 test2" echo "servermsg $MSG" | rcon -c /usr/local/etc/rcon.yaml
the output is

[user@server dir]$ ./message.sh
Waiting commands for localhost:port (or type :q to exit)
Broadcast a message to all connected players. Use: /servermsg "My Message"
[user@server dir]$

and nothing happens

echo aurora Dec 11, 2023, 5:58 PM

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where is rcon from?

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steamCMD?

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oh actually it's in the debian repo

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could you send me your rcon yaml?

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I'm not too familiar with using rcon manually but I can have a look

remote dome Dec 11, 2023, 6:01 PM

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but it works fine with echo 'servermsg "$MSG"' | rcon -c /usr/local/etc/rcon.yaml and I can't use the variable as I posted above, $MSG will appear

echo aurora Dec 11, 2023, 6:02 PM

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oh the yaml is the actual configuration to your server

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ok you don't need to send me that 😄

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I installed it via apt and I'm looking at the rconclt now

remote dome Dec 11, 2023, 6:04 PM

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I'd send you that config, but you can believe me that I've used rcon successfully before, including for sending out notifications that were written explicitly without variables, so it's all about using variables

echo aurora Dec 11, 2023, 6:04 PM

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yea, I got you, I don't need it it's just the connection parameters right

remote dome Dec 11, 2023, 6:05 PM

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I used to have a script that said so and so rcon -c config_file 'servermsg "message"'

remote dome Dec 11, 2023, 6:07 PM

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echo aurora oh actually it's in the debian repo

I think i got it from the web, actually the OS is almalinux, but it's not that important. we have the same bash

echo aurora Dec 11, 2023, 6:07 PM

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ya the one in the debian repo seems to be slightly different command names but it's just a wrapper

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all my SteamCMD installs are in docker containers and I just wanted to have a quick look at the syntax which I was able to do with the version in the debian repo

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how about:
rcon -c /usr/local/etc/rcon.yaml $(echo servermsg $MSG)
or
echo servermsg $MSG | xargs rcon -c /usr/local/etc/rcon.yaml?

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it may work if rcon is expecting standard input

remote dome Dec 11, 2023, 6:32 PM

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seems rcon expecting "servermsg and_the_text_next_to_it" because with MSG="test1 test2"; rcon -c /usr/local/etc/rcon.yaml $(echo "servermsg "$MSG"") it says Unknown command test1 and Unknown command test2

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same with echo servermsg $MSG | xargs rcon -c /usr/local/etc/rcon.yaml

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or with echo "servermsg $MSG"

echo aurora Dec 11, 2023, 6:39 PM

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what about echo 'servermsg "$MSG"' | xargs etcetc

remote dome Dec 11, 2023, 6:46 PM

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In your variant, when using xargs, rcon considered $MSG to be the next command:
Broadcast a message to all connected players. Use: /servermsg "My Message"

Unknown command $MSG

and no output in the game

echo aurora Dec 11, 2023, 6:47 PM

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ok we're getting closer, let's escape some quotes

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echo \'servermsg \"$MSG\"\'

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pipes to xarg etc etc

remote dome Dec 11, 2023, 6:50 PM

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Unknown command 'servermsg "test1 test2"'

echo aurora Dec 11, 2023, 6:50 PM

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ok lets try echo 'servermsg \"$MSG\"' ?

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it's odd because it looks just like your test command here: rcon -c /usr/local/etc/rcon.yaml 'servermsg "test1 test2"' test1 test2 appear

remote dome Dec 11, 2023, 6:52 PM

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yay wait

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seems that one:
MSG="test1 test2" echo -e \'servermsg \"$MSG\"\' | xargs rcon -c /usr/local/etc/rcon.yaml
works correctly

echo aurora Dec 11, 2023, 6:54 PM

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oh great

remote dome Dec 11, 2023, 6:55 PM

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I'll put your nickname in the info for my utility, I can put your name or mailing address if you send it to dm

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thanks a lot

echo aurora Dec 11, 2023, 6:58 PM

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happy to help! good luck

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send me a link to your github/repo for the project if its public

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if you want

remote dome Dec 11, 2023, 7:00 PM

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I haven't done it yet, but I will later.

safe sleet Dec 11, 2023, 9:06 PM

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With all due respect, If the guy can't do the simplest of bash scripting, not sure id want the public really using their scripts

safe sleet Dec 11, 2023, 9:19 PM

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dim radish How about trying something along the lines of: ```bash rcon -c /usr/local/etc/rc...

This will work, and is probably the cleanest way of doing it

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So then rcon -c /usr/local/etc/rcon.yaml "servermsg \"$msgvar\""

remote dome Dec 12, 2023, 5:23 AM

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safe sleet With all due respect, If the guy can't do the simplest of bash scripting, not su...

Two heads are better than one, maybe you'll take part in the development, friend?

echo aurora Dec 12, 2023, 6:49 AM

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safe sleet With all due respect, If the guy can't do the simplest of bash scripting, not su...

this is a pretty weird and out of pocket take. github is full of people's learning projects. Sharing a project open source is an excellent way to learn. if everyone waits to do anything until they already knew everything, nothing would ever get done. with all due respect, it's none of your business.

remote dome Dec 12, 2023, 8:28 AM

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No need to argue, friends. I have tested your suggestions in my script. @echo aurora's option works either way. @safe sleet's option works too, but not under all conditions. I probably should have figured out about escaping quotes myself, and should have known about xargs, but it just so happens to be part of the learning curve. Thanks again, sir @echo aurora.

odd swift Dec 12, 2023, 10:55 AM

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Is your rcon opensource? Would love to see. Thanks.

safe sleet Dec 12, 2023, 12:21 PM

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echo aurora this is a pretty weird and out of pocket take. github is full of people's learni...

You are right about it being a weird statement, and I knew that going into it. Apologies if it hurt anyone's feelings.

safe sleet Dec 12, 2023, 12:21 PM

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odd swift Is your rcon opensource? Would love to see. Thanks.

Probably this one https://github.com/gorcon/rcon-cli probably this same one i use

GitHub

GitHub - gorcon/rcon-cli: RCON client for executing queries on game...

RCON client for executing queries on game server. Contribute to gorcon/rcon-cli development by creating an account on GitHub.

echo aurora Dec 12, 2023, 12:25 PM

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safe sleet You are right about it being a weird statement, and I knew that going into it. ...

no worries, no feelings hurt and not taken personal. I understand your sentiment but I don't think you should gatekeep publishing scripting/coding projects. If indie stone waited until they knew everything about everything none of us would be here today.

safe sleet Dec 12, 2023, 12:25 PM

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True haha

safe sleet Dec 12, 2023, 12:44 PM

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@echo aurora did the method using xargs work with something you tested that the other method didn't? Only thing I can think of is if you have a " character in your message. I didn't think xargs would protect against that though, at least in the example given. I usually use xargs a bit differently for scenarios where i want to run a command multiple times, like for each line of input

echo aurora Dec 12, 2023, 1:50 PM

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I don't have a setup to test with; I don't have RCON installed locally and didn't want to install it just to test with. The other method didn't work for vsnegupal so I was suggesting a method that would isolate the string building from the cl options. Then the errors vsnegupal was getting suggested that rcon wasn't taking standard input from the pipe so used xargs to work around that.

echo aurora Dec 12, 2023, 1:50 PM

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safe sleet <@193217894065111040> did the method using xargs work with something you tested ...

meant to tag you

safe sleet Dec 12, 2023, 3:16 PM

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Oh, I didn't even realize you weren't OP haha my bad

#need some help with the bash script 2

In your variant, when using xargs, rcon considered $MSG to be the next command: Broadcast a message to all connected players. Use: /servermsg "My Message"

In your variant, when using xargs, rcon considered $MSG to be the next command:
Broadcast a message to all connected players. Use: /servermsg "My Message"