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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
9e2f7c11 LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
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11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
9e2f7c11 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
6aaa8c2f | 23 | #include <sys/utsname.h> |
9e2f7c11 | 24 | |
07630cea | 25 | #include "hostname-util.h" |
9e2f7c11 | 26 | #include "macro.h" |
07630cea | 27 | #include "string-util.h" |
9e2f7c11 LP |
28 | #include "util.h" |
29 | #include "specifier.h" | |
30 | ||
31 | /* | |
32 | * Generic infrastructure for replacing %x style specifiers in | |
33 | * strings. Will call a callback for each replacement. | |
34 | * | |
35 | */ | |
36 | ||
19f6d710 LP |
37 | int specifier_printf(const char *text, const Specifier table[], void *userdata, char **_ret) { |
38 | char *ret, *t; | |
9e2f7c11 LP |
39 | const char *f; |
40 | bool percent = false; | |
41 | size_t l; | |
19f6d710 | 42 | int r; |
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43 | |
44 | assert(text); | |
45 | assert(table); | |
46 | ||
47 | l = strlen(text); | |
19f6d710 LP |
48 | ret = new(char, l+1); |
49 | if (!ret) | |
50 | return -ENOMEM; | |
9e2f7c11 | 51 | |
19f6d710 | 52 | t = ret; |
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53 | |
54 | for (f = text; *f; f++, l--) { | |
55 | ||
56 | if (percent) { | |
57 | if (*f == '%') | |
58 | *(t++) = '%'; | |
59 | else { | |
60 | const Specifier *i; | |
61 | ||
62 | for (i = table; i->specifier; i++) | |
63 | if (i->specifier == *f) | |
64 | break; | |
65 | ||
66 | if (i->lookup) { | |
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67 | _cleanup_free_ char *w = NULL; |
68 | char *n; | |
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69 | size_t k, j; |
70 | ||
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71 | r = i->lookup(i->specifier, i->data, userdata, &w); |
72 | if (r < 0) { | |
73 | free(ret); | |
74 | return r; | |
9e2f7c11 LP |
75 | } |
76 | ||
19f6d710 | 77 | j = t - ret; |
9e2f7c11 LP |
78 | k = strlen(w); |
79 | ||
7ae03f36 LP |
80 | n = new(char, j + k + l + 1); |
81 | if (!n) { | |
19f6d710 LP |
82 | free(ret); |
83 | return -ENOMEM; | |
9e2f7c11 LP |
84 | } |
85 | ||
19f6d710 | 86 | memcpy(n, ret, j); |
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87 | memcpy(n + j, w, k); |
88 | ||
19f6d710 | 89 | free(ret); |
9e2f7c11 | 90 | |
19f6d710 | 91 | ret = n; |
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92 | t = n + j + k; |
93 | } else { | |
94 | *(t++) = '%'; | |
95 | *(t++) = *f; | |
96 | } | |
97 | } | |
98 | ||
99 | percent = false; | |
100 | } else if (*f == '%') | |
101 | percent = true; | |
102 | else | |
103 | *(t++) = *f; | |
104 | } | |
105 | ||
106 | *t = 0; | |
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107 | *_ret = ret; |
108 | return 0; | |
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109 | } |
110 | ||
111 | /* Generic handler for simple string replacements */ | |
112 | ||
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113 | int specifier_string(char specifier, void *data, void *userdata, char **ret) { |
114 | char *n; | |
115 | ||
116 | n = strdup(strempty(data)); | |
117 | if (!n) | |
118 | return -ENOMEM; | |
119 | ||
120 | *ret = n; | |
121 | return 0; | |
9e2f7c11 | 122 | } |
d848b9cb | 123 | |
19f6d710 | 124 | int specifier_machine_id(char specifier, void *data, void *userdata, char **ret) { |
d848b9cb | 125 | sd_id128_t id; |
19f6d710 | 126 | char *n; |
d848b9cb ZJS |
127 | int r; |
128 | ||
129 | r = sd_id128_get_machine(&id); | |
130 | if (r < 0) | |
19f6d710 | 131 | return r; |
d848b9cb | 132 | |
19f6d710 LP |
133 | n = new(char, 33); |
134 | if (!n) | |
135 | return -ENOMEM; | |
d848b9cb | 136 | |
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137 | *ret = sd_id128_to_string(id, n); |
138 | return 0; | |
d848b9cb ZJS |
139 | } |
140 | ||
19f6d710 | 141 | int specifier_boot_id(char specifier, void *data, void *userdata, char **ret) { |
d848b9cb | 142 | sd_id128_t id; |
19f6d710 | 143 | char *n; |
d848b9cb ZJS |
144 | int r; |
145 | ||
146 | r = sd_id128_get_boot(&id); | |
147 | if (r < 0) | |
19f6d710 | 148 | return r; |
d848b9cb | 149 | |
19f6d710 LP |
150 | n = new(char, 33); |
151 | if (!n) | |
152 | return -ENOMEM; | |
d848b9cb | 153 | |
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154 | *ret = sd_id128_to_string(id, n); |
155 | return 0; | |
d848b9cb ZJS |
156 | } |
157 | ||
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158 | int specifier_host_name(char specifier, void *data, void *userdata, char **ret) { |
159 | char *n; | |
160 | ||
161 | n = gethostname_malloc(); | |
162 | if (!n) | |
163 | return -ENOMEM; | |
164 | ||
165 | *ret = n; | |
166 | return 0; | |
d848b9cb | 167 | } |
6aaa8c2f | 168 | |
19f6d710 | 169 | int specifier_kernel_release(char specifier, void *data, void *userdata, char **ret) { |
6aaa8c2f | 170 | struct utsname uts; |
19f6d710 | 171 | char *n; |
6aaa8c2f ZJS |
172 | int r; |
173 | ||
174 | r = uname(&uts); | |
175 | if (r < 0) | |
19f6d710 LP |
176 | return -errno; |
177 | ||
178 | n = strdup(uts.release); | |
179 | if (!n) | |
180 | return -ENOMEM; | |
6aaa8c2f | 181 | |
19f6d710 LP |
182 | *ret = n; |
183 | return 0; | |
6aaa8c2f | 184 | } |