[LTP] [RFC PATCH 01/13] mem/lib: convert to new API

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> I saw this MACRO, but it doesn't work with too much pointers which
> transfered by multi level function.
> 
> This test program is not work:
> =======================
> 
> #include <stdio.h>
> #include "tst_test.h"
> 
> long read_meminfo(char *item)
> {
>         long val;
> 
>         SAFE_FILE_LINES_SCANF("/proc/meminfo", "%s %ld", item, &val);

This is because the item has to be part of the matching string and not a
item to be matched the "%s %ld" string would match first line in the
/proc/meminfo. The easiest solution would be turning this into a macro:

#define SAFE_READ_MEMINFO(item) \
	({long tst_rval; \
	  SAFE_FILE_LINES_SCANF("/proc/meminfo", item " %ld",
	  &tst_rval); \

This of course works only when item is compile time string constant, but
I doubt that we use it with anything else.

-- 
Cyril Hrubis
chrubis@suse.cz