`sapi/cgi/tests/005.phpt` test is failing on Alpine linux

[mvorisek]

Description

test log:

 ========DIFF========
001+ string(51) "Interactive mode enabled
002+ No input file specified.
003+ 
004+ "
005+ string(51) "Interactive mode enabled
     string(51) "No input file specified.
006+ No input file specified.
001- string(51) "No input file specified.
002- Interactive mode enabled
     
     "
005- string(51) "No input file specified.
006- Interactive mode enabled
007- 
008- "
     Done
========DONE========
FAIL using invalid combinations of cmdline options [sapi/cgi/tests/005.phpt] 

CI: https://github.com/php/php-src/runs/7506106345?check_suite_focus=true#step:10:4007

the error messages are swapped on Alpine linux and the expected output thus does not match - can this be unified in the php-src?

PHP Version

master

Operating System

Alpine linux

[arnaud-lb]

The string Interactive mode enabled is printed to stdout, and No input file specified. to stderr. As a result, the order is undefined.

Adding 2>&1 would make the order predictable.

[mvorisek]

Do you want to submit a PR or should I submit it?

[mvorisek]

Maybe we can pipe to null and test twice, once for stdout, once for stderr.

[arnaud-lb]

I was wrong, I misread the code: both are sent to stdout.

What actually happens is that printf("Interactive mode enabled\n\n") is buffered in glibc, so it ends up being printed later. This could be fixed by a fflush(stdout) after printf.

Do you want to submit a PR or should I submit it?

Go ahead if you want :)

[mvorisek]

No worries and thanks for looking into it! I will submit PR shortly.