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digitalmars.D.learn - Disable wrilten buf in docker

reply zoujiaqing <zoujiaqing gmail.com> writes:
Hi, my application use writeln in docker don't display.


Python add -u disable it.
https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container
Mar 11
next sibling parent reply "Richard (Rikki) Andrew Cattermole" <richard cattermole.co.nz> writes:
On D's side you can use ``stdout.flush;`` to force it to flush.

I don't think there is a way to force flushing via CLI.
Mar 11
parent zoujiaqing <zoujiaqing gmail.com> writes:
On Tuesday, 12 March 2024 at 06:39:40 UTC, Richard (Rikki) Andrew 
Cattermole wrote:

 On D's side you can use ``stdout.flush;`` to force it to flush.

 I don't think there is a way to force flushing via CLI.


OK, thank you!

Problem solved!

Use code:

```D
std.stdio.stdout.flush();
```
Mar 12
prev sibling parent reply Steven Schveighoffer <schveiguy gmail.com> writes:
On Tuesday, 12 March 2024 at 06:36:09 UTC, zoujiaqing wrote:

 Hi, my application use writeln in docker don't display.


 Python add -u disable it.
 https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container



Use setvbuf to switch to line buffering. Then you don’t have to 
manually flush everything

https://en.cppreference.com/w/c/io/setvbuf

-Steve
Mar 12
parent zoujiaqing <zoujiaqing gmail.com> writes:
On Tuesday, 12 March 2024 at 15:44:08 UTC, Steven Schveighoffer 
wrote:

 On Tuesday, 12 March 2024 at 06:36:09 UTC, zoujiaqing wrote:

 Hi, my application use writeln in docker don't display.


 Python add -u disable it.
 https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container



 Use setvbuf to switch to line buffering. Then you don’t have to 
 manually flush everything

 https://en.cppreference.com/w/c/io/setvbuf

 -Steve


Thank you Steve!

how to use it in global?
Mar 13