[LTP] [Question] Why test C API failed in github CI

[Li Wang]

Hi Petr and all,

Firstly, I'm sorry to push the patchset about oom protection cursorily.

The GitHub CI complained about the following failures, I feel confused
when I add a bit of debug code in my private branch then. It gets passed
in access(score_path, R_OK|W_OK) but failed in closing the file and
give no EACCESS errno, that's wired.

Did I miss anything?

https://github.com/wangli5665/ltp/runs/4594473907?check_suite_focus=true

-----error log------
runtest TINFO: * test05
14tst_memutils.c:118: TWARN: Failed to close FILE
'/proc/63046/oom_score_adj'
15tst_memutils.c:119: TBROK: Failed to close FILE
'/proc/63046/oom_score_adj': EACCES (13)
...
----------------------

--- a/lib/tst_memutils.c
+++ b/lib/tst_memutils.c
@@ -111,7 +111,13 @@ static void set_oom_score_adj(pid_t pid, int value)
                        tst_brk(TBROK, "%s does not exist, please check if
PID is valid", score_path);
        }

+       //debug code
+       if (access(score_path, R_OK | W_OK) == -1)
+               tst_brk(TBROK, "%s not readable/writeable", score_path);
+
        FILE_PRINTF(score_path, "%d", value);
+       SAFE_FILE_PRINTF(score_path, "%d", value);
+
        FILE_SCANF(score_path, "%d", &val);

        if (val != value) {


-- 
Regards,
Li Wang
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