Paul Eggert wrote:
> In the meantime I installed the attached to Gnulib, to 
> document the incompatibility, which also occurs with getlogin_r.

These two patches actually work around the bugs.

With this, coreutils should be fine, since it already imports the 'getlogin'
module from gnulib.


2025-03-09  Bruno Haible  <bruno@clisp.org>

	getlogin_r: Work around musl bug.
	* lib/getlogin_r.c (getlogin_r): Add implementation for Linux.
	* m4/getlogin_r.m4 (gl_FUNC_GETLOGIN_R): Test whether getlogin_r has the
	musl bug.
	* tests/test-getlogin_r.c (main): Add another test.
	* doc/posix-functions/getlogin_r.texi: Mention the workaround.

2025-03-09  Bruno Haible  <bruno@clisp.org>

	getlogin: Work around musl bug.
	* lib/unistd.in.h (getlogin): Consider REPLACE_GETLOGIN.
	* lib/getlogin.c: Change license header to GPL.
	(getlogin): Add implementation for Linux.
	* m4/getlogin.m4 (gl_FUNC_GETLOGIN): Test whether getlogin works.
	* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize REPLACE_GETLOGIN.
	* modules/unistd-h (Makefile.am): Substitute REPLACE_GETLOGIN.
	* modules/getlogin (Depends-on): Add readutmp.
	(configure.ac): Consider REPLACE_GETLOGIN.
	(License): Change to GPL.
	* tests/test-getlogin.c (main): Add another test.
	* doc/posix-functions/getlogin.texi: Mention the workaround.