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Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844255]

Tue, 07 September 2021 08:54

nguyen nam

Messages: 2
Registered: September 2021

Junior Member

Im currently working on my Test Suit where I have to run several linux command with input that I have in my testcase.

Is there any built-in function or any lib that enable me to do this? Ive been searching around but no result.

Thanks alot :D

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Re: Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844273 is a reply to message #1844255]

Tue, 07 September 2021 16:53

Gábor Szalai

Messages: 134
Registered: December 2015

Senior Member

Yes, there is.
Namely the PIPE test port:
https://gitlab.eclipse.org/eclipse/titan/titan.TestPorts.PIPEasp

You can execute the command and interact with it via the stdin and stdout

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Re: Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844288 is a reply to message #1844273]

Wed, 08 September 2021 07:20

nguyen nam

Messages: 2
Registered: September 2021

Junior Member

Gábor Szalai wrote on Tue, 07 September 2021 16:53

Yes, there is. Namely the PIPE test port: https://gitlab.eclipse.org/eclipse/titan/titan.TestPorts.PIPEasp You can execute the command and interact with it via the stdin and stdout

Thanks for the reply.

I've actually never used any extra ttcn libs on gitlab.eclipse but the ones that my operator setup. So I dont really know what are the dependencies for this libs as I dont see any import in the .ttcn files and what to do with those .cc and .hh files, any suggestion ?

[Updated on: Wed, 08 September 2021 07:48]

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Re: Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844292 is a reply to message #1844288]

Wed, 08 September 2021 09:35

Yann Garcia

Messages: 145
Registered: June 2016

Senior Member

Dear All,

Another way could be the external function.

BR\ Yann

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Re: Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844318 is a reply to message #1844292]

Wed, 08 September 2021 19:42

Olaf Bergengruen

Messages: 127
Registered: November 2018

Senior Member

Hi Yann,

yes, in my implementation I use an external function which sends a query to the user via UDP and waits for a response (the PTC is blocked until the response arrives).
An external MMI server gets these queries and presents them to the user on a nice GUI and upon user response forwards it to the TTCN Tester.

Olaf

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Re: Is it posible to execute linux command or executing a bash script using TTCN3? [message #1844322 is a reply to message #1844318]

Thu, 09 September 2021 06:43

Gábor Szalai

Messages: 134
Registered: December 2015

Senior Member

For queries over UDP it is better to use UDP or IPL4 test port.

Please note that the blocking of the execution in external function can cause some unexpected problems.

We experienced a lot of weird problem with executing external commands/programs from external function. Like non closable sockets, messed up log files, double or missed events and messages etc.

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