Commit ffb4c76d authored by Jules Tamagnan's avatar Jules Tamagnan Committed by Eli Zaretskii

src/editfns.c (group-name): New function.

parent 4f0e5422
......@@ -1230,6 +1230,11 @@ groups on the system. If Emacs cannot retrieve this information, the
return value is @code{nil}.
@end defun
@defun user-login-name gid
This runction returns the group name that corresponds to @var{gid},
or @code{nil} if there is no such group.
@end defun
@node Time of Day
@section Time of Day
......
......@@ -1263,6 +1263,9 @@ where there's no better alternative. We believe that the incorrect
uses of this function all but disappeared by now, so we are
un-obsoleting it.
+++
** New function 'group-name' returns a group name based on a group-GID
* Changes in Emacs 27.1 on Non-Free Operating Systems
......
......@@ -1143,6 +1143,21 @@ of the user with that uid, or nil if there is no such user. */)
return (pw ? build_string (pw->pw_name) : Qnil);
}
DEFUN ("group-name", Fgroup_name, Sgroup_name, 1, 1, 0,
doc: /* If argument GID is an integer or a float, return the login name
of the group with that gid, or nil if there is no such GID. */)
(Lisp_Object gid)
{
struct group *gr;
gid_t id;
CONS_TO_INTEGER (gid, gid_t, id);
block_input ();
gr = getgrgid (id);
unblock_input ();
return (gr ? build_string (gr->gr_name) : Qnil);
}
DEFUN ("user-real-login-name", Fuser_real_login_name, Suser_real_login_name,
0, 0, 0,
doc: /* Return the name of the user's real uid, as a string.
......@@ -4487,6 +4502,7 @@ it to be non-nil. */);
defsubr (&Sinsert_byte);
defsubr (&Suser_login_name);
defsubr (&Sgroup_name);
defsubr (&Suser_real_login_name);
defsubr (&Suser_uid);
defsubr (&Suser_real_uid);
......
......@@ -351,4 +351,11 @@
(should (equal (format "%-#50.40x" v3)
"-0x000000003ffffffffffffffe000000000000000 "))))
(ert-deftest group-name ()
(let ((list `((0 . "root")
(1000 . ,(user-login-name 1000))
(1212345 . nil))))
(dolist (test list)
(should (equal (group-name (car test)) (cdr test))))))
;;; editfns-tests.el ends here
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