1 /* Copyright (C) 1997-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #include <libc-lock.h>
24 #include "utmp-private.h"
27 /* This is the default name. */
28 static const char default_file_name
[] = _PATH_UTMP
;
30 /* Current file name. */
31 const char *__libc_utmp_file_name
= (const char *) default_file_name
;
33 /* We have to use the lock in getutent_r.c. */
34 __libc_lock_define (extern, __libc_utmp_lock attribute_hidden
)
38 __utmpname (const char *file
)
42 __libc_lock_lock (__libc_utmp_lock
);
44 /* Close the old file. */
47 if (strcmp (file
, __libc_utmp_file_name
) != 0)
49 if (strcmp (file
, default_file_name
) == 0)
51 free ((char *) __libc_utmp_file_name
);
53 __libc_utmp_file_name
= default_file_name
;
57 char *file_name
= __strdup (file
);
58 if (file_name
== NULL
)
62 if (__libc_utmp_file_name
!= default_file_name
)
63 free ((char *) __libc_utmp_file_name
);
65 __libc_utmp_file_name
= file_name
;
72 __libc_lock_unlock (__libc_utmp_lock
);
75 libc_hidden_def (__utmpname
)
76 weak_alias (__utmpname
, utmpname
)