1 /* Copyright (C) 2010-2021 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 <pwd.h>
19 #include <unistd.h>
20 #include <not-cancel.h>
21
22 #define STATIC static
23 #define getlogin getlogin_fd0
24 #include <sysdeps/unix/getlogin.c>
25 #undef getlogin
26
27
28 /* Return the login name of the user, or NULL if it can't be determined.
29 The returned pointer, if not NULL, is good only until the next call. */
30
31 char *
getlogin(void)32 getlogin (void)
33 {
34 int res = __getlogin_r_loginuid (name, sizeof (name));
35 if (res >= 0)
36 return res == 0 ? name : NULL;
37
38 return getlogin_fd0 ();
39 }
40