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 #include <sys/types.h>
19 #include <utmp.h>
20 #include <errno.h>
21 #include <stdlib.h>
22
23 #include "utmp32.h"
24 #include "utmp-convert.h"
25
26 #include "utmpx32.h"
27 #include "utmpx-convert.h"
28
29 /* Allocate a static buffer to be returned to the caller. As well as
30 with the existing version of these functions the caller has to be
31 aware that the contents of this buffer will change with subsequent
32 calls. */
33 #define ALLOCATE_UTMPX32_OUT(OUT) \
34 static struct utmpx32 *OUT = NULL; \
35 \
36 if (OUT == NULL) \
37 { \
38 OUT = malloc (sizeof (struct utmpx32)); \
39 if (OUT == NULL) \
40 return NULL; \
41 }
42
43 /* Perform a lookup for a utmpx entry matching FIELD using function
44 FUNC. FIELD is converted to a 64 bit utmpx and the result is
45 converted back to 32 bit utmpx. */
46 #define ACCESS_UTMPX_ENTRY(FUNC, FIELD) \
47 struct utmpx in64; \
48 struct utmpx *out64; \
49 ALLOCATE_UTMPX32_OUT (out32); \
50 \
51 utmpx_convert32to64 (FIELD, &in64); \
52 out64 = FUNC (&in64); \
53 \
54 if (out64 == NULL) \
55 return NULL; \
56 \
57 utmpx_convert64to32 (out64, out32); \
58 \
59 return out32;
60
61
62 /* Get the next entry from the user accounting database. */
63 struct utmpx32 *
getutxent32(void)64 getutxent32 (void)
65 {
66 struct utmpx *out64;
67 ALLOCATE_UTMPX32_OUT (out32);
68
69 out64 = __getutxent ();
70 if (!out64)
71 return NULL;
72
73 utmpx_convert64to32 (out64, out32);
74 return out32;
75
76 }
77 symbol_version (getutxent32, getutxent, GLIBC_2.1);
78
79 /* Get the user accounting database entry corresponding to ID. */
80 struct utmpx32 *
getutxid32(const struct utmpx32 * id)81 getutxid32 (const struct utmpx32 *id)
82 {
83 ACCESS_UTMPX_ENTRY (__getutxid, id);
84 }
85 symbol_version (getutxid32, getutxid, GLIBC_2.1);
86
87 /* Get the user accounting database entry corresponding to LINE. */
88 struct utmpx32 *
getutxline32(const struct utmpx32 * line)89 getutxline32 (const struct utmpx32 *line)
90 {
91 ACCESS_UTMPX_ENTRY (__getutxline, line);
92 }
93 symbol_version (getutxline32, getutxline, GLIBC_2.1);
94
95 /* Write the entry UTMPX into the user accounting database. */
96 struct utmpx32 *
pututxline32(const struct utmpx32 * utmpx)97 pututxline32 (const struct utmpx32 *utmpx)
98 {
99 ACCESS_UTMPX_ENTRY (__pututxline, utmpx);
100 }
101 symbol_version (pututxline32, pututxline, GLIBC_2.1);
102
103 /* Append entry UTMP to the wtmpx-like file WTMPX_FILE. */
104 void
updwtmpx32(const char * wtmpx_file,const struct utmpx32 * utmpx)105 updwtmpx32 (const char *wtmpx_file, const struct utmpx32 *utmpx)
106 {
107 struct utmpx in64;
108
109 utmpx_convert32to64 (utmpx, &in64);
110 __updwtmpx (wtmpx_file, &in64);
111 }
112 symbol_version (updwtmpx32, updwtmpx, GLIBC_2.1);
113
114 /* Copy the information in UTMPX to UTMP. */
115 void
getutmp32(const struct utmpx32 * utmpx,struct utmp32 * utmp)116 getutmp32 (const struct utmpx32 *utmpx, struct utmp32 *utmp)
117 {
118 struct utmpx in64;
119 struct utmp out64;
120
121 utmpx_convert32to64 (utmpx, &in64);
122 __getutmp (&in64, &out64);
123 utmp_convert64to32 (&out64, utmp);
124 }
125 symbol_version (getutmp32, getutmp, GLIBC_2.1.1);
126
127 /* Copy the information in UTMP to UTMPX. */
128 void
getutmpx32(const struct utmp32 * utmp,struct utmpx32 * utmpx)129 getutmpx32 (const struct utmp32 *utmp, struct utmpx32 *utmpx)
130 {
131 struct utmp in64;
132 struct utmpx out64;
133
134 utmp_convert32to64 (utmp, &in64);
135 __getutmpx (&in64, &out64);
136 utmpx_convert64to32 (&out64, utmpx);
137 }
138 symbol_version (getutmpx32, getutmpx, GLIBC_2.1.1);
139