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688903eb | 1 | /* Copyright (C) 2008-2018 Free Software Foundation, Inc. |
4057dc45 UD |
2 | Contributed by Andreas Krebbel <Andreas.Krebbel@de.ibm.com>. |
3 | This file is part of the GNU C Library. | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <sys/types.h> | |
20 | #include <utmp.h> | |
21 | #include <errno.h> | |
22 | #include <libc-symbols.h> | |
23 | ||
24 | #include "utmp32.h" | |
25 | #include "utmp-convert.h" | |
26 | ||
27 | /* Allocate a static buffer to be returned to the caller. As well as | |
28 | with the existing version of these functions the caller has to be | |
29 | aware that the contents of this buffer will change with subsequent | |
30 | calls. */ | |
31 | #define ALLOCATE_UTMP32_OUT(OUT) \ | |
32 | static struct utmp32 *OUT = NULL; \ | |
0cbcca89 | 33 | \ |
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34 | if (OUT == NULL) \ |
35 | { \ | |
36 | OUT = malloc (sizeof (struct utmp32)); \ | |
37 | if (OUT == NULL) \ | |
38 | return NULL; \ | |
39 | } | |
40 | ||
41 | /* Perform a lookup for a utmp entry matching FIELD using function | |
42 | FUNC. FIELD is converted to a 64 bit utmp and the result is | |
43 | converted back to 32 bit utmp. */ | |
44 | #define ACCESS_UTMP_ENTRY(FUNC, FIELD) \ | |
45 | struct utmp in64; \ | |
46 | struct utmp *out64; \ | |
47 | ALLOCATE_UTMP32_OUT (out32); \ | |
48 | \ | |
49 | utmp_convert32to64 (FIELD, &in64); \ | |
50 | out64 = FUNC (&in64); \ | |
51 | \ | |
52 | if (out64 == NULL) \ | |
53 | return NULL; \ | |
54 | \ | |
55 | utmp_convert64to32 (out64, out32); \ | |
56 | \ | |
57 | return out32; | |
58 | ||
59 | /* Search forward from the current point in the utmp file until the | |
60 | next entry with a ut_type matching ID->ut_type. */ | |
61 | struct utmp32 * | |
62 | getutid32 (const struct utmp32 *id) | |
63 | { | |
03849910 | 64 | ACCESS_UTMP_ENTRY (__getutid, id) |
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65 | } |
66 | symbol_version (getutid32, getutid, GLIBC_2.0); | |
67 | ||
68 | /* Search forward from the current point in the utmp file until the | |
69 | next entry with a ut_line matching LINE->ut_line. */ | |
70 | struct utmp32 * | |
71 | getutline32 (const struct utmp32 *line) | |
72 | { | |
03849910 | 73 | ACCESS_UTMP_ENTRY (__getutline, line) |
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74 | } |
75 | symbol_version (getutline32, getutline, GLIBC_2.0); | |
76 | ||
77 | /* Write out entry pointed to by UTMP_PTR into the utmp file. */ | |
78 | struct utmp32 * | |
79 | pututline32 (const struct utmp32 *utmp_ptr) | |
80 | { | |
03849910 | 81 | ACCESS_UTMP_ENTRY (__pututline, utmp_ptr) |
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82 | } |
83 | symbol_version (pututline32, pututline, GLIBC_2.0); | |
84 | ||
85 | /* Read next entry from a utmp-like file. */ | |
86 | struct utmp32 * | |
87 | getutent32 (void) | |
88 | { | |
89 | struct utmp *out64; | |
90 | ALLOCATE_UTMP32_OUT (out32); | |
91 | ||
03849910 | 92 | out64 = __getutent (); |
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93 | if (!out64) |
94 | return NULL; | |
95 | ||
96 | utmp_convert64to32 (out64, out32); | |
97 | return out32; | |
98 | } | |
99 | symbol_version (getutent32, getutent, GLIBC_2.0); | |
100 | ||
101 | /* Reentrant versions of the file for handling utmp files. */ | |
102 | ||
103 | int | |
104 | getutent32_r (struct utmp32 *buffer, struct utmp32 **result) | |
105 | { | |
106 | struct utmp out64; | |
107 | struct utmp *out64p; | |
108 | int ret; | |
109 | ||
03849910 | 110 | ret = __getutent_r (&out64, &out64p); |
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111 | if (ret == -1) |
112 | { | |
113 | *result = NULL; | |
114 | return -1; | |
115 | } | |
116 | ||
117 | utmp_convert64to32 (out64p, buffer); | |
118 | *result = buffer; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | symbol_version (getutent32_r, getutent_r, GLIBC_2.0); | |
123 | ||
124 | int | |
125 | getutid32_r (const struct utmp32 *id, struct utmp32 *buffer, | |
126 | struct utmp32 **result) | |
127 | { | |
128 | struct utmp in64; | |
129 | struct utmp out64; | |
130 | struct utmp *out64p; | |
131 | int ret; | |
132 | ||
133 | utmp_convert32to64 (id, &in64); | |
134 | ||
03849910 | 135 | ret = __getutid_r (&in64, &out64, &out64p); |
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136 | if (ret == -1) |
137 | { | |
138 | *result = NULL; | |
139 | return -1; | |
140 | } | |
141 | ||
142 | utmp_convert64to32 (out64p, buffer); | |
143 | *result = buffer; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | symbol_version (getutid32_r, getutid_r, GLIBC_2.0); | |
148 | ||
149 | int | |
150 | getutline32_r (const struct utmp32 *line, | |
151 | struct utmp32 *buffer, struct utmp32 **result) | |
152 | { | |
153 | struct utmp in64; | |
154 | struct utmp out64; | |
155 | struct utmp *out64p; | |
156 | int ret; | |
157 | ||
158 | utmp_convert32to64 (line, &in64); | |
159 | ||
03849910 | 160 | ret = __getutline_r (&in64, &out64, &out64p); |
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161 | if (ret == -1) |
162 | { | |
163 | *result = NULL; | |
164 | return -1; | |
165 | } | |
166 | ||
167 | utmp_convert64to32 (out64p, buffer); | |
168 | *result = buffer; | |
169 | ||
170 | return 0; | |
171 | ||
172 | } | |
173 | symbol_version (getutline32_r, getutline_r, GLIBC_2.0); | |
174 | ||
175 | /* Append entry UTMP to the wtmp-like file WTMP_FILE. */ | |
176 | void | |
177 | updwtmp32 (const char *wtmp_file, const struct utmp32 *utmp) | |
178 | { | |
179 | struct utmp in32; | |
180 | ||
181 | utmp_convert32to64 (utmp, &in32); | |
03849910 | 182 | __updwtmp (wtmp_file, &in32); |
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183 | } |
184 | symbol_version (updwtmp32, updwtmp, GLIBC_2.0); |