Opening a terminal console and running commands from OD plugin

[Patricia Nedina]

Hi, I'm trying to build a OD plugin that collects some inputs from user and at the end, runs a Terminal Console, do a command and extract the returned code. 

The command will use a path determined by user. 

So, I'm looking for clues to, inside OD: 

* Collect a folder path

* Open a Terminal Console and run my command

Is that possible? If so, can anyone help me? 

[Wayne Mogg]

Patricia,

All that is possible. Not sure where you are currently at in your use of OpendTect but to start with I suggest you:

• Install the Developers Package
• Follow the instructions in the documentation to setup a plugin development environment
• Ensure you have installed the required build environment for your hardware/OS
• Build and test the tutorial attributes/plugins included in the plugin development environment to make sure your development setup is working
• Have a look though the source code of OpendTect, especially the plugins folder, and also my plugins (https://github.com/waynegm/OpendTect-Plugins) for inspiration where there are lots of examples of using dialog boxes in plugins to collect user input and then do something. The OpendTect libraries also include crossplatform functions/classes to run external processes (Basic/oscommand.h)
  

Come back to this list if you need help along the way.

Regards,

Wayne Mogg

[JB West]

Patricia,

   I use this in a plugin to open a console window & execute a command (a .bat or shell script ).

  BufferString *mcmd = new BufferString();
#ifdef _WIN32
mcmd->add("cmd.exe /c start cmd.exe /k ");
#else
mcmd->add("/bin/sh ");
#endif

// cmd contains the script name & any parameters blank separated

mcmd->add(cmd->str());
OS::CommandLauncher cl = OS::MachineCommand(mcmd->str());
std::cout << mcmd->str() << std::endl;
OS::CommandExecPars pars; 

//  Background -- doesn't block OpendTect for long-running scripts

pars.launchtype_ = OS::RunInBG;
pars.isconsoleuiprog_ = true;
bool cstat = cl.execute(pars); 

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[Patricia Nedina]

Hi Wayne, thanks for reply. 

I'm in use of OD. I 'm having a good time with plugin development environment and yours plugins. 

I will explore oscommand.h   

I forgot to tell that my SO is Ubuntu, but I think it is irrevelevant at this point.

[Wayne Mogg]

Patricia,

Looks good. For file selection have a look at uiTools/uifileinput.h which you could use instead of the text box for entering a file name. It includes a text box and a button that will open a file selection dialog.

Regards,

Wayne Mogg

[Patricia Nedina]

Hello Wayne, thanks for reply.

 

I'm in use of OD. I 'm having a good time with plugin development environment and yours plugins. I will explore oscommand.h  

My SO is Ubuntu. 

JB, your plugin is for Windows? If so, I will try that way at Windows and then go to Ubuntu. 

[JB West]

Both windows and Linux. Note the #ifdef _WIN32

Jb

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[Patricia Nedina]

Hi JB, your tip was really great.

I tried this (Linux) and worked:

void openShell()
{
    string _command = "./createFile";
    const char* command = _command.c_str();
    OS::CommandLauncher cl = OS::MachineCommand(command);

    OS::CommandExecPars pars;
    //  Background -- doesn't block OpendTect for long-running scripts
    pars.launchtype_ = OS::RunInBG;
    pars.isconsoleuiprog_ = true;
    bool cstat = cl.execute(pars);

    cout << cstat << endl;
}

My challenge now is change the PATH. I want something like  to  run my script "createFile" from other directory, like Documents/Test

I tried to follow https://stackoverflow.com/questions/786376/how-do-i-run-a-program-with-a-different-working-directory-from-current-from-lin without sucess. I tried check oscommand.h but didn't find a clue. Do you know if it is possible?

thx in advance

Em quinta-feira, 28 de maio de 2020 02:46:51 UTC-3, JB West escreveu:

Both windows and Linux. Note the #ifdef _WIN32

Jb

On Wed, May 27, 2020, 9:37 PM Patricia Nedina <patrici...@gmail.com> wrote:

Hello Wayne, thanks for reply.

 

I'm in use of OD. I 'm having a good time with plugin development environment and yours plugins. I will explore oscommand.h  

My SO is Ubuntu. 

JB, your plugin is for Windows? If so, I will try that way at Windows and then go to Ubuntu. 

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[JB West]

You can just change the command to Documents/test/CreateFile

I use an environment variable set outside OpendTect to set the top level path, and the get it in the plugin & prepend the command with it.

jbw

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[Patricia Nedina]

Hi,

I'm still with the PATH problem. My path is outside OpendTect folder. I tried './home/pnedina/Downloads/createFile' without success. But a folder 'test' inside Survey directory works if I use './test/createFile'; So my issue is how set the top level path outside OD flow. Do you mind sharing with me this piece of your code?

In the future I will collect this path from user and I will set it at the code. For now, any outside folder is being used for tests, like Downloads and Documents.

Thx in advance

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[Wayne Mogg]

Patricia,

If you remove the '.' at the front of the path, ie '/home/pnedina/Downloads/createFile' it should work. The '.' makes the path start from the current folder which for OpendTect is the current survey folder.

Regards,

Wayne Mogg

[Patricia Nedina]

Thanks very much Wayne, now "/home/pnedina/Downloads/createFile" works!

I will continue my plugin.

Best regards,

[Patricia Nedina]

Wayne,

For my purposes I really will need change directory.

I will need chance for directory 1 to run a script from directory 2 with an argument (a file) from directory 3.

So I need something like "cd /completePath1/ ; /completePath2/script < /completePath3/filename.txt", but at plugin command 'cd' isn't reconized neither the third party ('< /completePath3/filename.txt'). I managed to do it using a bash script, so, I ask: Can I do it without bash script? Just using cpp with plugin OD?   

Thanks again,

[JB West]

Why don't you just start the bash script from ODT and pass any relevant arguments?

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[Wayne Mogg]

Patricia,

 To invoke those commands straight from OD you need to prepend "bash -c" so the command starts up a bash shell. You also need to make sure the commands are properly quoted/escaped. (https://wiki-dev.bash-hackers.org/syntax/quoting)

[Patricia Nedina]

JB and Wayne,

Thanks again for your help. I was forgetting to use CommandLineParser::addFilePath() to construct my command. I think now I'm ok with this task.