1/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stddef.h>
19#include <errno.h>
20#include <unistd.h>
21#include <hurd.h>
22
23/* Return the login name of the user, or NULL if it can't be determined.
24 The returned pointer, if not NULL, is good only until the next call. */
25char *
26getlogin (void)
27{
28 static char login[1024]; /* XXX */
29 error_t err;
30
31 if (err = __USEPORT (PROC, __proc_getlogin (port, login)))
32 {
33 errno = err;
34 return NULL;
35 }
36
37 return login;
38}
39

source code of glibc/sysdeps/mach/hurd/getlogin.c