chown (GNU Gnulib)

Gnulib module: chown

Portability problems fixed by Gnulib:

Some platforms fail to detect trailing slash on non-directories, as in chown("link-to-file/",uid,gid): macOS 14, FreeBSD 7.2, AIX 7.3.1, Solaris 9.
Some platforms fail to update the change time when at least one argument was not -1, but no ownership changes resulted: OpenBSD 7.2.
When passed an argument of -1, some implementations really set the owner user/group id of the file to this value, rather than leaving that id of the file alone: some very old platforms.
When applied to a symbolic link, some implementations don’t dereference the symlink, i.e. they behave like lchown: some very old platforms.
This function is missing on some platforms; however, the replacement always fails with ENOSYS: mingw, MSVC 14.

Portability problems not fixed by Gnulib:

This function sometimes fails with EACCES when the failure is due to lack of appropriate privileges (EPERM), not to search permission denied on the file name prefix (EACCES): Linux kernel 5.15 with glibc 2.35 and a CIFS v1 file system (see https://bugs.gnu.org/65599).