• Andre Pany (17/17) Aug 28 2019 Hi,
• a11e99z (8/14) Aug 28 2019 1) mother process "b" shouldn't terminates/close_pipes early than
• a11e99z (4/4) Aug 28 2019 On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
• Gregor =?UTF-8?B?TcO8Y2ts?= (14/32) Aug 28 2019 The check in druntime could be changed to query the type of file
• a11e99z (22/25) Aug 28 2019 import std;
• Gregor =?UTF-8?B?TcO8Y2ts?= (4/31) Aug 28 2019 This isn't the problem, is it? It's the D runtime throwing up a
• Andre Pany (4/31) Aug 28 2019 Thanks again. This solves my problem.

Andre Pany <andre s-e-a-p.de> writes:

Hi,

I call another process using function pipeShell and Redirect.all.

In case the child process(also D application) throws an exception 
(str to int conversion exception), the child process shows a 
message box on windows.

I found the source code within DRuntime but I do not see a way to 
hide this MessageBox.

https://github.com/dlang/druntime/blob/25c8c1506183699758ca3bc323bb2a84a1d93f40/src/rt/dmain2.d#L644

I would like to have the exception text available in stdout or 
stderr of the pipe.
Why the exception isn't just written to the pipe?

(I do not want to implement a catch all in the source code of the 
child process).

The actual 2 D applications causing the dialog on windows: 
https://forum.dlang.org/post/usfmuabytdoludeuldts forum.dlang.org

Kind regards
Andre

a11e99z <black80 bk.ru> writes:

On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
 Hi,

 I call another process using function pipeShell and 
 Redirect.all.

 In case the child process(also D application) throws an 
 exception (str to int conversion exception), the child process 
 shows a message box on windows.

1) mother process "b" shouldn't terminates/close_pipes early than 
"a" cuz lines 690 checks stderr is valid, if no then MessageBox 
is showing.
2) if "a" is wrong or hang just terminate it, result already 
known.
3) also u can try redirect not all pipes just stdout/stdin, 
stderr for "a" probably will be working to mother console.

a11e99z <black80 bk.ru> writes:

On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:

and try to use
https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhand
ingapi-seterrormode     SEM_FAILCRITICALERRORS
for mother process and child process will inherit it

Gregor =?UTF-8?B?TcO8Y2ts?= <gregormueckl gmx.de> writes:

On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
 Hi,

 I call another process using function pipeShell and 
 Redirect.all.

 In case the child process(also D application) throws an 
 exception (str to int conversion exception), the child process 
 shows a message box on windows.

 I found the source code within DRuntime but I do not see a way 
 to hide this MessageBox.

 https://github.com/dlang/druntime/blob/25c8c1506183699758ca3bc323bb2a84a1d93f40/src/rt/dmain2.d#L644

 I would like to have the exception text available in stdout or 
 stderr of the pipe.
 Why the exception isn't just written to the pipe?

 (I do not want to implement a catch all in the source code of 
 the child process).

 The actual 2 D applications causing the dialog on windows: 
 https://forum.dlang.org/post/usfmuabytdoludeuldts forum.dlang.org

 Kind regards
 Andre

The check in druntime could be changed to query the type of file 
handle that stdout/stderr point to. If they are a console or a 
file redirection, the error could be written there.

The following stack overflow question gives a possible test 
whether stdout/stderr exists: 
https://stackoverflow.com/questions/9021916/how-do-i-check-if-my-delphi-console-app-is-redirected-to-a-file-or-pipe

The documentation for GetStdHandle and GetFileType looks good, 
but I haven't tried it. I could probably write a quick proof of 
concept tonight.

An (IMO ugly) alternative would be to extend 
pipeShell/pipeProcess to launch the child process attached to a 
console on top of the redirects.

Gregor

a11e99z <black80 bk.ru> writes:

On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
 Hi,

 I call another process using function pipeShell and 
 Redirect.all.

import std;

void main()
{
     auto p = pipeShell("a.exe", Redirect.all);
     p.stdin.writeln("e1");
     p.stdin.writeln("10");
     p.stdin.writeln("e2");
     p.stdin.writeln("9");

     p.stdin.flush();
     p.stdout.readln.writeln;

     import core.thread: Thread;
     import core.time: seconds;

     Thread.sleep(2.seconds);
     p.stdin.close;
     p.stderr.byLineCopy.writeln;
     Thread.sleep(1.seconds);
     try {
	p.pid.kill; // Windows exception here "Access denied"
     	p.pid.wait; // but no more MessageBox
     } catch (Throwable) { }
}

Gregor =?UTF-8?B?TcO8Y2ts?= <gregormueckl gmx.de> writes:

On Wednesday, 28 August 2019 at 13:15:14 UTC, a11e99z wrote:
 On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
 Hi,

 I call another process using function pipeShell and 
 Redirect.all.

 import std;

 void main()
 {
     auto p = pipeShell("a.exe", Redirect.all);
     p.stdin.writeln("e1");
     p.stdin.writeln("10");
     p.stdin.writeln("e2");
     p.stdin.writeln("9");

     p.stdin.flush();
     p.stdout.readln.writeln;

     import core.thread: Thread;
     import core.time: seconds;

     Thread.sleep(2.seconds);
     p.stdin.close;
     p.stderr.byLineCopy.writeln;
     Thread.sleep(1.seconds);
     try {
 	p.pid.kill; // Windows exception here "Access denied"
     	p.pid.wait; // but no more MessageBox
     } catch (Throwable) { }
 }

This isn't the problem, is it? It's the D runtime throwing up a 
message box for an uncaught D exception if it doesn't get caught 
inside main() and there is no console attached.

Andre Pany <andre s-e-a-p.de> writes:

On Wednesday, 28 August 2019 at 13:15:14 UTC, a11e99z wrote:
 On Wednesday, 28 August 2019 at 12:19:54 UTC, Andre Pany wrote:
 Hi,

 I call another process using function pipeShell and 
 Redirect.all.

 import std;

 void main()
 {
     auto p = pipeShell("a.exe", Redirect.all);
     p.stdin.writeln("e1");
     p.stdin.writeln("10");
     p.stdin.writeln("e2");
     p.stdin.writeln("9");

     p.stdin.flush();
     p.stdout.readln.writeln;

     import core.thread: Thread;
     import core.time: seconds;

     Thread.sleep(2.seconds);
     p.stdin.close;
     p.stderr.byLineCopy.writeln;
     Thread.sleep(1.seconds);
     try {
 	p.pid.kill; // Windows exception here "Access denied"
     	p.pid.wait; // but no more MessageBox
     } catch (Throwable) { }
 }

Thanks again. This solves my problem.

Kind regards
André