Shellexecute @ UBUNTU platform

[bernhard_LA 0]

I need a solution  to  replace the shellexecute command for the windows  platform   

If possible no external / 3rd party  lib involved 

Can someone  provide a working code here ?

[David Heffernan 2345]

There is no way to replace all the functionality of ShellExecute which encompasses the entire shell verb mechanism in Windows. 

 

What specific functionality of ShellExecute are you looking to replicate? 

[bernhard_LA 0]

Basic Wish 

 

a) just start a executeable like  ./myapplication    and pass also command line parameters 

 

Advanced Wish 

 

b) a notification once  the ./myappliaction  is finished 

 

 

work around 

 

i)  any solution using RAD C++   and Linux compile  options ?? 

ii) call a phyton script from Delphi ????

iii) a dll written in Lazarus ?????

[ergeka 5]

Perhaps this gives an idea.

 

https://chapmanworld.com/2017/04/06/calling-linux-commands-from-delphi/

 

 

[Remy Lebeau 1392]

4 hours ago, bernhard_LA said:

a) just start a executeable like  ./myapplication    and pass also command line parameters 

 

b) a notification once  the ./myappliaction  is finished

Why were you using ShellExecute() for that?  You should have been using CreateProcess() instead.  To detect when the process ends, use WaitForSingleObject() or related function on the returned process handle.

 

On Linux, you can start an external process using the fork(), exec...(), or posix_spawn() functions.  To detect when the process ends, use wait() on the returned process ID.

Edited November 6, 2019 by Remy Lebeau

[David Heffernan 2345]

No need for a workaround. Creating processes, and waiting for them to terminate is routine stuff on all platforms.

 

Definitely worth seconding everything that @Remy Lebeau said. You don't want to replicate ShellExecute because you don't want to use it at all. ShellExecute is used to execute shell verbs. But you want to create a process. A quite different thing altogether. Albeit the open verb on an executable file often results in a new process being created. 

[Fr0sT.Brutal 900]

Lazarus has multiplatform TProcess with STDIN/OUT interception, waiting for finish and so on. I wonder if something like that exists for Delphi (this should really be in RTL as it's "routine stuff")

[Remy Lebeau 1392]

12 hours ago, Fr0sT.Brutal said:

Lazarus has multiplatform TProcess with STDIN/OUT interception, waiting for finish and so on. I wonder if something like that exists for Delphi

There is nothing like FPC's TProcess in Delphi's RTL.  I'm sure you can find a 3rd party implementation, though.  Or just write your own.

[Fr0sT.Brutal 900]

12 hours ago, Remy Lebeau said:

There is nothing like FPC's TProcess in Delphi's RTL.  I'm sure you can find a 3rd party implementation, though.  Or just write your own.

I know there isn't but Idera really should think about adding one.

[Ugochukwu Mmaduekwe 42]

Here is an attempt by someone to implement FPC awesome TProcess in Delphi.

May be someone else can work on extending it with Linux support.

[Joseph MItzen 251]

On 11/7/2019 at 1:50 AM, Fr0sT.Brutal said:

Lazarus has multiplatform TProcess with STDIN/OUT interception, waiting for finish and so on. I wonder if something like that exists for Delphi (this should really be in RTL as it's "routine stuff")

I know David Heffernan and I have debated this before , but IMHO no, there's nothing like Lazarus' TProcess, Qt's QProcess, or Python's run function in Delphi (David disagrees). I also am puzzled why Delphi has never had a simple way to execute commands and retrieve results.

[David Heffernan 2345]

25 minutes ago, Joseph MItzen said:

David disagrees

If I actually disagreed with you, I'd produce a counter example. I don't think I have because I don't think there is one. 

 

Therefore I can't believe that I disagree. 

[Joseph MItzen 251]

1 hour ago, David Heffernan said:

If I actually disagreed with you, I'd produce a counter example. I don't think I have because I don't think there is one. 

 

Therefore I can't believe that I disagree. 

OK, I think I recalled the disagreement somewhat wrong. It was about being able to call a process and get its output back into Delphi. I cited the standard code examples per

 

https://stackoverflow.com/questions/9119999/getting-output-from-a-shell-dos-app-into-a-delphi-app

 

and opined that it was rather complicated. You offered another method and argued that it wasn't really very hard at all.

[Dave Nottage 554]

On 11/7/2019 at 4:31 AM, ergeka said:

https://chapmanworld.com/2017/04/06/calling-linux-commands-from-delphi/

For anyone else coming across this link, it has moved to:

https://chapmanworld.com/calling-linux-commands-from-delphi/