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4e731273 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
11c3a366 TA |
20 | #include <stdbool.h> |
21 | #include <stddef.h> | |
22 | #include <string.h> | |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
4e731273 LP |
25 | #include "extract-word.h" |
26 | #include "fileio.h" | |
27 | #include "macro.h" | |
28 | #include "parse-util.h" | |
29 | #include "proc-cmdline.h" | |
30 | #include "process-util.h" | |
c573dcfe | 31 | #include "special.h" |
4e731273 LP |
32 | #include "string-util.h" |
33 | #include "util.h" | |
34 | #include "virt.h" | |
35 | ||
36 | int proc_cmdline(char **ret) { | |
37 | assert(ret); | |
38 | ||
39 | if (detect_container() > 0) | |
40 | return get_process_cmdline(1, 0, false, ret); | |
41 | else | |
42 | return read_one_line_file("/proc/cmdline", ret); | |
43 | } | |
44 | ||
45 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { | |
46 | _cleanup_free_ char *line = NULL; | |
47 | const char *p; | |
48 | int r; | |
49 | ||
50 | assert(parse_item); | |
51 | ||
52 | r = proc_cmdline(&line); | |
53 | if (r < 0) | |
54 | return r; | |
55 | ||
56 | p = line; | |
57 | for (;;) { | |
58 | _cleanup_free_ char *word = NULL; | |
59 | char *value = NULL; | |
60 | ||
61 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); | |
62 | if (r < 0) | |
63 | return r; | |
64 | if (r == 0) | |
65 | break; | |
66 | ||
67 | /* Filter out arguments that are intended only for the | |
68 | * initrd */ | |
69 | if (!in_initrd() && startswith(word, "rd.")) | |
70 | continue; | |
71 | ||
72 | value = strchr(word, '='); | |
73 | if (value) | |
74 | *(value++) = 0; | |
75 | ||
76 | r = parse_item(word, value); | |
77 | if (r < 0) | |
78 | return r; | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | int get_proc_cmdline_key(const char *key, char **value) { | |
85 | _cleanup_free_ char *line = NULL, *ret = NULL; | |
86 | bool found = false; | |
87 | const char *p; | |
88 | int r; | |
89 | ||
90 | assert(key); | |
91 | ||
92 | r = proc_cmdline(&line); | |
93 | if (r < 0) | |
94 | return r; | |
95 | ||
96 | p = line; | |
97 | for (;;) { | |
98 | _cleanup_free_ char *word = NULL; | |
99 | const char *e; | |
100 | ||
101 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); | |
102 | if (r < 0) | |
103 | return r; | |
104 | if (r == 0) | |
105 | break; | |
106 | ||
107 | /* Filter out arguments that are intended only for the | |
108 | * initrd */ | |
109 | if (!in_initrd() && startswith(word, "rd.")) | |
110 | continue; | |
111 | ||
112 | if (value) { | |
113 | e = startswith(word, key); | |
114 | if (!e) | |
115 | continue; | |
116 | ||
117 | r = free_and_strdup(&ret, e); | |
118 | if (r < 0) | |
119 | return r; | |
120 | ||
121 | found = true; | |
122 | } else { | |
123 | if (streq(word, key)) | |
124 | found = true; | |
125 | } | |
126 | } | |
127 | ||
128 | if (value) { | |
129 | *value = ret; | |
130 | ret = NULL; | |
131 | } | |
132 | ||
133 | return found; | |
134 | ||
135 | } | |
136 | ||
137 | int shall_restore_state(void) { | |
138 | _cleanup_free_ char *value = NULL; | |
139 | int r; | |
140 | ||
141 | r = get_proc_cmdline_key("systemd.restore_state=", &value); | |
142 | if (r < 0) | |
143 | return r; | |
144 | if (r == 0) | |
145 | return true; | |
146 | ||
934ae16b | 147 | return parse_boolean(value); |
4e731273 | 148 | } |
c573dcfe EV |
149 | |
150 | static const char * const rlmap[] = { | |
151 | "emergency", SPECIAL_EMERGENCY_TARGET, | |
152 | "-b", SPECIAL_EMERGENCY_TARGET, | |
153 | "rescue", SPECIAL_RESCUE_TARGET, | |
154 | "single", SPECIAL_RESCUE_TARGET, | |
155 | "-s", SPECIAL_RESCUE_TARGET, | |
156 | "s", SPECIAL_RESCUE_TARGET, | |
157 | "S", SPECIAL_RESCUE_TARGET, | |
158 | "1", SPECIAL_RESCUE_TARGET, | |
159 | "2", SPECIAL_MULTI_USER_TARGET, | |
160 | "3", SPECIAL_MULTI_USER_TARGET, | |
161 | "4", SPECIAL_MULTI_USER_TARGET, | |
162 | "5", SPECIAL_GRAPHICAL_TARGET, | |
dcd61450 IS |
163 | NULL |
164 | }; | |
165 | ||
166 | static const char * const rlmap_initrd[] = { | |
167 | "emergency", SPECIAL_EMERGENCY_TARGET, | |
168 | "rescue", SPECIAL_RESCUE_TARGET, | |
169 | NULL | |
c573dcfe EV |
170 | }; |
171 | ||
172 | const char* runlevel_to_target(const char *word) { | |
173 | size_t i; | |
dcd61450 IS |
174 | const char * const *rlmap_ptr = in_initrd() ? rlmap_initrd |
175 | : rlmap; | |
c573dcfe EV |
176 | |
177 | if (!word) | |
178 | return NULL; | |
179 | ||
dcd61450 IS |
180 | if (in_initrd() && (word = startswith(word, "rd.")) == NULL) |
181 | return NULL; | |
182 | ||
183 | for (i = 0; rlmap_ptr[i] != NULL; i += 2) | |
184 | if (streq(word, rlmap_ptr[i])) | |
185 | return rlmap_ptr[i+1]; | |
c573dcfe EV |
186 | |
187 | return NULL; | |
188 | } |