1 /* Copyright (C) 2008-2022 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
19 /* This file provides functions converting between the 32 and 64 bit
20 struct utmp variants. */
21
22 #ifndef _UTMP_CONVERT_H
23 #define _UTMP_CONVERT_H 1
24
25 #include <string.h>
26
27 #include "utmp32.h"
28
29 /* Convert the 64 bit struct utmp value in FROM to the 32 bit version
30 returned in TO. */
31 static inline void
utmp_convert64to32(const struct utmp * from,struct utmp32 * to)32 utmp_convert64to32 (const struct utmp *from, struct utmp32 *to)
33 {
34 #if _HAVE_UT_TYPE - 0
35 to->ut_type = from->ut_type;
36 #endif
37 #if _HAVE_UT_PID - 0
38 to->ut_pid = from->ut_pid;
39 #endif
40 memcpy (to->ut_line, from->ut_line, UT_LINESIZE);
41 memcpy (to->ut_user, from->ut_user, UT_NAMESIZE);
42 #if _HAVE_UT_ID - 0
43 memcpy (to->ut_id, from->ut_id, 4);
44 #endif
45 #if _HAVE_UT_HOST - 0
46 memcpy (to->ut_host, from->ut_host, UT_HOSTSIZE);
47 #endif
48 to->ut_exit = from->ut_exit;
49 to->ut_session = (int32_t) from->ut_session;
50 #if _HAVE_UT_TV - 0
51 to->ut_tv.tv_sec = (int32_t) from->ut_tv.tv_sec;
52 to->ut_tv.tv_usec = (int32_t) from->ut_tv.tv_usec;
53 #endif
54 memcpy (to->ut_addr_v6, from->ut_addr_v6, 4 * 4);
55 }
56
57 /* Convert the 32 bit struct utmp value in FROM to the 64 bit version
58 returned in TO. */
59 static inline void
utmp_convert32to64(const struct utmp32 * from,struct utmp * to)60 utmp_convert32to64 (const struct utmp32 *from, struct utmp *to)
61 {
62 #if _HAVE_UT_TYPE - 0
63 to->ut_type = from->ut_type;
64 #endif
65 #if _HAVE_UT_PID - 0
66 to->ut_pid = from->ut_pid;
67 #endif
68 memcpy (to->ut_line, from->ut_line, UT_LINESIZE);
69 memcpy (to->ut_user, from->ut_user, UT_NAMESIZE);
70 #if _HAVE_UT_ID - 0
71 memcpy (to->ut_id, from->ut_id, 4);
72 #endif
73 #if _HAVE_UT_HOST - 0
74 memcpy (to->ut_host, from->ut_host, UT_HOSTSIZE);
75 #endif
76 to->ut_exit = from->ut_exit;
77 to->ut_session = (int64_t) from->ut_session;
78 #if _HAVE_UT_TV - 0
79 to->ut_tv.tv_sec = (int64_t) from->ut_tv.tv_sec;
80 to->ut_tv.tv_usec = (int64_t) from->ut_tv.tv_usec;
81 #endif
82 memcpy (to->ut_addr_v6, from->ut_addr_v6, 4 * 4);
83 }
84
85 #endif /* utmp-convert.h */
86