getcwd: improve documentation

[Bruno Haible]

Now that we know that opendir, fdopendir, closedir (and openat, lstat) are
known to set errno upon failure, the same behaviour follows for getcwd() and
then also for xgetcwd().


2020-06-26  Bruno Haible  <bruno@clisp.org>

        xgetcwd: Improve documentation.
        * lib/xgetcwd.c (xgetcwd): Document the failure return convention.

2020-06-26  Bruno Haible  <bruno@clisp.org>

        getcwd: Improve documentation.
        * lib/getcwd.c (__getcwd): Document the failure return convention.

0001-getcwd-Improve-documentation.patch
Description: Text Data

0002-xgetcwd-Improve-documentation.patch
Description: Text Data