Re: [PATCH 3/3] getcwd: enhance tests

[Jim Meyering]

Eric Blake wrote:
> * tests/test-getcwd-lgpl.c: New file, taken from...
> * tests/test-getcwd.c: ...old contents.  Rewrite this file to
> repeat m4 long path stress tests.
> * modules/getcwd-lgpl-tests: New module.
> * modules/getcwd-tests (Depends-on): Depend on lgpl tests.

Please mark (preferably in both places) the copied code,
so we have a better chance of keeping all of the copies in sync.
Better still (but harder: you'll need to know the name of the .m4
directory in the test directory's Makefile) would be to automatically
extract code from the m4 file to be used in the C test programs.

Why?  For starters, in reviewing this, I spotted
a typo in a comment I wrote:

  > +     this relative expensive and invasive test if that's not true.  */

That should be "relatively".

With your proposed changes, that typo would have then appeared
in two separate places: getcwd.m4 and this new test.

> diff --git a/tests/test-getcwd.c b/tests/test-getcwd.c
...
> +  /* The bug is triggered when PATH_MAX < getpagesize (), so skip
> +     this relative expensive and invasive test if that's not true.  */
> +  if (getpagesize () <= PATH_MAX)
> +    return 0;