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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
29686440 ZJS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Zbigniew Jędrzejewski-Szmek | |
29686440 ZJS |
6 | ***/ |
7 | ||
a8fbdf54 TA |
8 | #include <errno.h> |
9 | #include <stdarg.h> | |
10 | #include <stdio.h> | |
11 | #include <stdlib.h> | |
12 | ||
b5efdb8a | 13 | #include "alloc-util.h" |
1a7f1b38 | 14 | #include "conf-files.h" |
8fb3f009 | 15 | #include "dirent-util.h" |
3ffd4af2 | 16 | #include "dropin.h" |
4f5dd394 | 17 | #include "escape.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
4f5dd394 | 19 | #include "fileio-label.h" |
17e78d18 | 20 | #include "fs-util.h" |
a8fbdf54 TA |
21 | #include "hashmap.h" |
22 | #include "log.h" | |
23 | #include "macro.h" | |
4f5dd394 | 24 | #include "mkdir.h" |
bb15fafe | 25 | #include "path-util.h" |
a8fbdf54 | 26 | #include "set.h" |
07630cea | 27 | #include "string-util.h" |
4f5dd394 | 28 | #include "strv.h" |
a8fbdf54 | 29 | #include "unit-name.h" |
29686440 | 30 | |
8eea8687 | 31 | int drop_in_file(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
32 | const char *name, char **_p, char **_q) { |
33 | ||
09c62487 | 34 | char prefix[DECIMAL_STR_MAX(unsigned)]; |
29686440 ZJS |
35 | _cleanup_free_ char *b = NULL; |
36 | char *p, *q; | |
37 | ||
38 | assert(unit); | |
39 | assert(name); | |
40 | assert(_p); | |
41 | assert(_q); | |
42 | ||
8eea8687 ZJS |
43 | sprintf(prefix, "%u", level); |
44 | ||
29686440 ZJS |
45 | b = xescape(name, "/."); |
46 | if (!b) | |
47 | return -ENOMEM; | |
48 | ||
ae6c3cc0 | 49 | if (!filename_is_valid(b)) |
29686440 ZJS |
50 | return -EINVAL; |
51 | ||
605405c6 | 52 | p = strjoin(dir, "/", unit, ".d"); |
29686440 ZJS |
53 | if (!p) |
54 | return -ENOMEM; | |
55 | ||
605405c6 | 56 | q = strjoin(p, "/", prefix, "-", b, ".conf"); |
29686440 ZJS |
57 | if (!q) { |
58 | free(p); | |
59 | return -ENOMEM; | |
60 | } | |
61 | ||
62 | *_p = p; | |
63 | *_q = q; | |
64 | return 0; | |
65 | } | |
66 | ||
8eea8687 | 67 | int write_drop_in(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
68 | const char *name, const char *data) { |
69 | ||
70 | _cleanup_free_ char *p = NULL, *q = NULL; | |
71 | int r; | |
72 | ||
73 | assert(dir); | |
74 | assert(unit); | |
75 | assert(name); | |
76 | assert(data); | |
77 | ||
8eea8687 | 78 | r = drop_in_file(dir, unit, level, name, &p, &q); |
29686440 ZJS |
79 | if (r < 0) |
80 | return r; | |
81 | ||
45519fd6 | 82 | (void) mkdir_p(p, 0755); |
29686440 ZJS |
83 | return write_string_file_atomic_label(q, data); |
84 | } | |
85 | ||
8eea8687 | 86 | int write_drop_in_format(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
87 | const char *name, const char *format, ...) { |
88 | _cleanup_free_ char *p = NULL; | |
89 | va_list ap; | |
90 | int r; | |
91 | ||
92 | assert(dir); | |
93 | assert(unit); | |
94 | assert(name); | |
95 | assert(format); | |
96 | ||
97 | va_start(ap, format); | |
98 | r = vasprintf(&p, format, ap); | |
99 | va_end(ap); | |
100 | ||
101 | if (r < 0) | |
102 | return -ENOMEM; | |
103 | ||
8eea8687 | 104 | return write_drop_in(dir, unit, level, name, p); |
29686440 | 105 | } |
1a7f1b38 | 106 | |
dcc4f30e | 107 | static int unit_file_find_dir( |
17e78d18 | 108 | const char *original_root, |
dcc4f30e ZJS |
109 | const char *path, |
110 | char ***dirs) { | |
1a7f1b38 | 111 | |
17e78d18 | 112 | _cleanup_free_ char *chased = NULL; |
1a7f1b38 ZJS |
113 | int r; |
114 | ||
115 | assert(path); | |
116 | ||
17e78d18 | 117 | r = chase_symlinks(path, original_root, 0, &chased); |
dfeec916 LN |
118 | /* Ignore -ENOENT, after all most units won't have a drop-in dir. |
119 | * Also ignore -ENAMETOOLONG, users are not even able to create | |
120 | * the drop-in dir in such case. This mostly happens for device units with long /sys path. | |
121 | * */ | |
122 | if (IN_SET(r, -ENOENT, -ENAMETOOLONG)) | |
09c62487 | 123 | return 0; |
17e78d18 | 124 | if (r < 0) |
09c62487 | 125 | return log_full_errno(LOG_WARNING, r, "Failed to canonicalize path %s: %m", path); |
17e78d18 | 126 | |
dcc4f30e ZJS |
127 | r = strv_push(dirs, chased); |
128 | if (r < 0) | |
129 | return log_oom(); | |
1a7f1b38 | 130 | |
dcc4f30e | 131 | chased = NULL; |
1a7f1b38 ZJS |
132 | return 0; |
133 | } | |
134 | ||
dcc4f30e | 135 | static int unit_file_find_dirs( |
17e78d18 | 136 | const char *original_root, |
7410616c | 137 | Set *unit_path_cache, |
1a7f1b38 ZJS |
138 | const char *unit_path, |
139 | const char *name, | |
140 | const char *suffix, | |
dcc4f30e | 141 | char ***dirs) { |
1a7f1b38 | 142 | |
96bb2fd8 | 143 | char *path; |
7410616c | 144 | int r; |
1a7f1b38 ZJS |
145 | |
146 | assert(unit_path); | |
147 | assert(name); | |
148 | assert(suffix); | |
149 | ||
96bb2fd8 | 150 | path = strjoina(unit_path, "/", name, suffix); |
1a7f1b38 | 151 | |
dcc4f30e ZJS |
152 | if (!unit_path_cache || set_get(unit_path_cache, path)) { |
153 | r = unit_file_find_dir(original_root, path, dirs); | |
154 | if (r < 0) | |
155 | return r; | |
156 | } | |
1a7f1b38 | 157 | |
7410616c | 158 | if (unit_name_is_valid(name, UNIT_NAME_INSTANCE)) { |
1a7f1b38 ZJS |
159 | /* Also try the template dir */ |
160 | ||
a09d3eaf LP |
161 | _cleanup_free_ char *template = NULL; |
162 | ||
7410616c LP |
163 | r = unit_name_template(name, &template); |
164 | if (r < 0) | |
165 | return log_error_errno(r, "Failed to generate template from unit name: %m"); | |
1a7f1b38 | 166 | |
a09d3eaf | 167 | return unit_file_find_dirs(original_root, unit_path_cache, unit_path, template, suffix, dirs); |
1a7f1b38 ZJS |
168 | } |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | int unit_file_find_dropin_paths( | |
17e78d18 | 174 | const char *original_root, |
1a7f1b38 ZJS |
175 | char **lookup_path, |
176 | Set *unit_path_cache, | |
95778782 ZJS |
177 | const char *dir_suffix, |
178 | const char *file_suffix, | |
1a7f1b38 | 179 | Set *names, |
058db925 | 180 | char ***ret) { |
1a7f1b38 | 181 | |
3f6de63b | 182 | _cleanup_strv_free_ char **dirs = NULL; |
1a7f1b38 | 183 | Iterator i; |
dcc4f30e | 184 | char *t, **p; |
1a7f1b38 ZJS |
185 | int r; |
186 | ||
058db925 | 187 | assert(ret); |
1a7f1b38 | 188 | |
dcc4f30e | 189 | SET_FOREACH(t, names, i) |
1a7f1b38 | 190 | STRV_FOREACH(p, lookup_path) |
dcc4f30e | 191 | unit_file_find_dirs(original_root, unit_path_cache, *p, t, dir_suffix, &dirs); |
1a7f1b38 | 192 | |
058db925 LP |
193 | if (strv_isempty(dirs)) { |
194 | *ret = NULL; | |
1a7f1b38 | 195 | return 0; |
058db925 | 196 | } |
1a7f1b38 | 197 | |
b5084605 | 198 | r = conf_files_list_strv(ret, file_suffix, NULL, 0, (const char**) dirs); |
1a7f1b38 | 199 | if (r < 0) |
3f6de63b | 200 | return log_warning_errno(r, "Failed to create the list of configuration files: %m"); |
058db925 | 201 | |
1a7f1b38 ZJS |
202 | return 1; |
203 | } |