setenv, unsetenv: work around various bugs

[gnulib.git] / doc / posix-functions / unsetenv.texi

diff --git a/doc/posix-functions/unsetenv.texi b/doc/posix-functions/unsetenv.texi
index 04c4fe3..f356627 100644 (file)
--- a/doc/posix-functions/unsetenv.texi
+++ b/doc/posix-functions/unsetenv.texi
@@ -15,6 +15,10 @@ AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, mingw, BeOS.
 This function has the return type @samp{void} instead of @samp{int} on some
 platforms:
 MacOS X 10.3, FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8, OSF/1 5.1.
+@item
+On some platforms, this function does not fail with @samp{EINVAL} when
+passed a null pointer, an empty string, or a string containing @samp{=}:
+FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8.
 @end itemize
 
 Portability problems not fixed by Gnulib: