git bash, how to see progressing printf() while running?

Asked Sep 27 '20 at 06:41

Active Sep 27 '20 at 08:02

Viewed 178 times

I've installed mingw64 to use gcc in git bash, and I'm programming simple c program. And there are the codes for example

for(int i=0;i<5;i++)
{
  printf("hello\n");
  sleep(3);
}

when I compile it and run this code ./a.exe like this the output comes out when the program is finished not while in progress. When I use Linux console exactly the same code as above, the printf() works and shows on the console while it is running. I would like the git bash to do the same. can you help me?

edited Sep 27 '20 at 08:02

Vishnu CS

asked Sep 27 '20 at 06:41

유유영균

1

I experienced some visual problems in git bash too, consider using wsl or powershell – roozbeh sharifnasab Sep 27 '20 at 06:47
1

Two notes: (1) While it's called "git bash", it's just a port of bash to Windows and has nothing to do with Git itself. (2) `printf` in C has nothing to do with bash or any shell. – torek Sep 27 '20 at 06:49
Now would perhaps be appropriate to show a screenshot of the shell with code running in it – Antti Haapala -- Слава Україні Sep 27 '20 at 06:56
You are using the git-bash under windows. So please tag as "git-bash" in the future and not with git and bash separately, as your question has nothing to do with git nor bash. :-) – Klaus Sep 27 '20 at 07:17
Add `setvbuf(stdout, NULL, _IONBF, 0);` before the loop or add `fflush(stdout);` after `printf`. Reference: https://stackoverflow.com/a/13035344/6330106 – ElpieKay Sep 27 '20 at 07:20
If @ElpieKay's hint helps, I'd suspect that the output in git bash is fully buffered, not line buffered. You might like to read the documentation of `setvbuf` (what you should do anyway, to know what you are doing) and try to set `stdout` to line buffered. – the busybee Sep 27 '20 at 11:25
sorry Klaus,, I'll be careful! – 유유영균 Oct 08 '20 at 01:15
thx for all, answering!! – 유유영균 Oct 08 '20 at 01:15

git bash, how to see progressing printf() while running?

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