]>
Commit | Line | Data |
---|---|---|
7e8d5761 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <assert.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | #include <getopt.h> | |
27 | ||
28 | #include "hashmap.h" | |
29 | #include "util.h" | |
30 | #include "path-util.h" | |
31 | #include "log.h" | |
32 | #include "pager.h" | |
33 | #include "build.h" | |
34 | ||
35 | static bool arg_no_pager = false; | |
36 | ||
37 | static int equivalent(const char *a, const char *b) { | |
38 | char *x, *y; | |
39 | int r; | |
40 | ||
41 | x = canonicalize_file_name(a); | |
42 | if (!x) | |
43 | return -errno; | |
44 | ||
45 | y = canonicalize_file_name(b); | |
46 | if (!y) { | |
47 | free(x); | |
48 | return -errno; | |
49 | } | |
50 | ||
51 | r = path_equal(x, y); | |
52 | free(x); | |
53 | free(y); | |
54 | ||
55 | return r; | |
56 | } | |
57 | ||
58 | static int found_override(const char *top, const char *bottom) { | |
59 | char *dest; | |
60 | int k; | |
61 | pid_t pid; | |
62 | ||
63 | assert(top); | |
64 | assert(bottom); | |
65 | ||
66 | if (null_or_empty_path(top) > 0) { | |
67 | printf(ANSI_HIGHLIGHT_RED_ON "[MASK]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); | |
68 | goto finish; | |
69 | } | |
70 | ||
71 | k = readlink_malloc(top, &dest); | |
72 | if (k >= 0) { | |
73 | if (equivalent(dest, bottom) > 0) | |
74 | printf(ANSI_HIGHLIGHT_GREEN_ON "[EQUIVALENT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); | |
75 | else | |
76 | printf(ANSI_HIGHLIGHT_ON "[REDIRECT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); | |
77 | ||
78 | free(dest); | |
79 | goto finish; | |
80 | } | |
81 | ||
82 | printf(ANSI_HIGHLIGHT_ON "[OVERRIDE]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); | |
83 | ||
84 | putchar('\n'); | |
85 | ||
86 | fflush(stdout); | |
87 | ||
88 | pid = fork(); | |
89 | if (pid < 0) { | |
90 | log_error("Failed to fork off diff: %m"); | |
91 | return -errno; | |
92 | } else if (pid == 0) { | |
93 | execlp("diff", "diff", "-us", "--", bottom, top, NULL); | |
94 | log_error("Failed to execute diff: %m"); | |
95 | _exit(1); | |
96 | } | |
97 | ||
98 | wait_for_terminate(pid, NULL); | |
99 | ||
100 | putchar('\n'); | |
101 | ||
102 | finish: | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static int enumerate_dir(Hashmap *top, Hashmap *bottom, const char *path) { | |
108 | DIR *d; | |
109 | int r = 0; | |
110 | ||
111 | assert(top); | |
112 | assert(bottom); | |
113 | assert(path); | |
114 | ||
115 | d = opendir(path); | |
116 | if (!d) { | |
117 | if (errno == ENOENT) | |
118 | return 0; | |
119 | ||
120 | log_error("Failed to enumerate %s: %m", path); | |
121 | return -errno; | |
122 | } | |
123 | ||
124 | for (;;) { | |
125 | struct dirent *de, buf; | |
126 | int k; | |
127 | char *p; | |
128 | ||
129 | k = readdir_r(d, &buf, &de); | |
130 | if (k != 0) { | |
131 | r = -k; | |
132 | goto finish; | |
133 | } | |
134 | ||
135 | if (!de) | |
136 | break; | |
137 | ||
138 | if (!dirent_is_file(de)) | |
139 | continue; | |
140 | ||
141 | p = join(path, "/", de->d_name, NULL); | |
142 | if (!p) { | |
143 | r = -ENOMEM; | |
144 | goto finish; | |
145 | } | |
146 | ||
147 | path_kill_slashes(p); | |
148 | ||
149 | k = hashmap_put(top, path_get_file_name(p), p); | |
150 | if (k >= 0) { | |
151 | p = strdup(p); | |
152 | if (!p) { | |
153 | r = -ENOMEM; | |
154 | goto finish; | |
155 | } | |
156 | } else if (k != -EEXIST) { | |
157 | free(p); | |
158 | r = k; | |
159 | goto finish; | |
160 | } | |
161 | ||
162 | free(hashmap_remove(bottom, path_get_file_name(p))); | |
163 | k = hashmap_put(bottom, path_get_file_name(p), p); | |
164 | if (k < 0) { | |
165 | free(p); | |
166 | r = k; | |
167 | goto finish; | |
168 | } | |
169 | } | |
170 | ||
171 | finish: | |
172 | closedir(d); | |
173 | ||
174 | return r; | |
175 | } | |
176 | ||
177 | static int process_suffix(const char *prefixes, const char *suffix) { | |
178 | const char *p; | |
179 | char *f; | |
180 | Hashmap *top, *bottom; | |
181 | int r = 0, k; | |
182 | Iterator i; | |
183 | int n_found = 0; | |
184 | ||
185 | assert(prefixes); | |
186 | assert(suffix); | |
187 | ||
188 | top = hashmap_new(string_hash_func, string_compare_func); | |
189 | if (!top) { | |
190 | r = -ENOMEM; | |
191 | goto finish; | |
192 | } | |
193 | ||
194 | bottom = hashmap_new(string_hash_func, string_compare_func); | |
195 | if (!bottom) { | |
196 | r = -ENOMEM; | |
197 | goto finish; | |
198 | } | |
199 | ||
200 | NULSTR_FOREACH(p, prefixes) { | |
201 | char *t; | |
202 | ||
203 | t = join(p, "/", suffix, NULL); | |
204 | if (!t) { | |
205 | r = -ENOMEM; | |
206 | goto finish; | |
207 | } | |
208 | ||
209 | k = enumerate_dir(top, bottom, t); | |
210 | if (k < 0) | |
211 | r = k; | |
212 | ||
213 | log_debug("Looking at %s", t); | |
214 | free(t); | |
215 | } | |
216 | ||
217 | HASHMAP_FOREACH(f, top, i) { | |
218 | char *o; | |
219 | ||
220 | o = hashmap_get(bottom, path_get_file_name(f)); | |
221 | assert(o); | |
222 | ||
223 | if (path_equal(o, f)) | |
224 | continue; | |
225 | ||
226 | k = found_override(f, o); | |
227 | if (k < 0) | |
228 | r = k; | |
229 | ||
230 | n_found ++; | |
231 | } | |
232 | ||
233 | finish: | |
234 | if (top) | |
235 | hashmap_free_free(top); | |
236 | if (bottom) | |
237 | hashmap_free_free(bottom); | |
238 | ||
239 | return r < 0 ? r : n_found; | |
240 | } | |
241 | ||
242 | static int process_suffix_chop(const char *prefixes, const char *suffix) { | |
243 | const char *p; | |
244 | ||
245 | assert(prefixes); | |
246 | assert(suffix); | |
247 | ||
248 | if (!path_is_absolute(suffix)) | |
249 | return process_suffix(prefixes, suffix); | |
250 | ||
251 | /* Strip prefix from the suffix */ | |
252 | NULSTR_FOREACH(p, prefixes) { | |
253 | if (startswith(suffix, p)) { | |
254 | suffix += strlen(p);; | |
255 | suffix += strspn(suffix, "/"); | |
256 | return process_suffix(prefixes, suffix); | |
257 | } | |
258 | } | |
259 | ||
260 | log_error("Invalid suffix specification %s.", suffix); | |
261 | return -EINVAL; | |
262 | } | |
263 | ||
264 | static void help(void) { | |
265 | ||
266 | printf("%s [OPTIONS...] [SUFFIX...]\n\n" | |
267 | "Find overridden configuration files.\n\n" | |
268 | " -h --help Show this help\n" | |
269 | " --version Show package version\n" | |
270 | " --no-pager Do not pipe output into a pager\n", | |
271 | program_invocation_short_name); | |
272 | } | |
273 | ||
274 | static int parse_argv(int argc, char *argv[]) { | |
275 | ||
276 | enum { | |
277 | ARG_NO_PAGER = 0x100, | |
278 | ARG_VERSION | |
279 | }; | |
280 | ||
281 | static const struct option options[] = { | |
282 | { "help", no_argument, NULL, 'h' }, | |
283 | { "version", no_argument, NULL, ARG_VERSION }, | |
284 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
285 | { NULL, 0, NULL, 0 } | |
286 | }; | |
287 | ||
288 | int c; | |
289 | ||
290 | assert(argc >= 1); | |
291 | assert(argv); | |
292 | ||
293 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
294 | ||
295 | switch (c) { | |
296 | ||
297 | case 'h': | |
298 | help(); | |
299 | return 0; | |
300 | ||
301 | case ARG_VERSION: | |
302 | puts(PACKAGE_STRING); | |
303 | puts(DISTRIBUTION); | |
304 | puts(SYSTEMD_FEATURES); | |
305 | return 0; | |
306 | ||
307 | case ARG_NO_PAGER: | |
308 | arg_no_pager = true; | |
309 | break; | |
310 | ||
311 | case '?': | |
312 | return -EINVAL; | |
313 | ||
314 | default: | |
315 | log_error("Unknown option code %c", c); | |
316 | return -EINVAL; | |
317 | } | |
318 | } | |
319 | ||
320 | return 1; | |
321 | } | |
322 | ||
323 | int main(int argc, char *argv[]) { | |
324 | ||
325 | const char prefixes[] = | |
326 | "/etc\0" | |
327 | "/run\0" | |
328 | "/usr/local/lib\0" | |
329 | "/usr/local/share\0" | |
330 | "/usr/lib\0" | |
331 | "/usr/share\0" | |
332 | #ifdef HAVE_SPLIT_USR | |
333 | "/lib\0" | |
334 | #endif | |
335 | ; | |
336 | ||
337 | const char suffixes[] = | |
338 | "sysctl.d\0" | |
339 | "tmpfiles.d\0" | |
340 | "modules-load.d\0" | |
341 | "systemd/system\0" | |
342 | "systemd/user\0" | |
343 | "binfmt.d\0" | |
344 | "udev/rules.d\0" | |
345 | "modprobe.d\0"; | |
346 | ||
347 | int r = 0, k; | |
348 | int n_found = 0; | |
349 | ||
350 | log_parse_environment(); | |
351 | log_open(); | |
352 | ||
353 | r = parse_argv(argc, argv); | |
354 | if (r <= 0) | |
355 | goto finish; | |
356 | ||
357 | if (!arg_no_pager) | |
358 | pager_open(); | |
359 | ||
360 | if (optind < argc) { | |
361 | int i; | |
362 | ||
363 | for (i = optind; i < argc; i++) { | |
364 | k = process_suffix_chop(prefixes, argv[i]); | |
365 | if (k < 0) | |
366 | r = k; | |
367 | else | |
368 | n_found += k; | |
369 | } | |
370 | ||
371 | } else { | |
372 | const char *n; | |
373 | ||
374 | NULSTR_FOREACH(n, suffixes) { | |
375 | k = process_suffix(prefixes, n); | |
376 | if (k < 0) | |
377 | r = k; | |
378 | else | |
379 | n_found += k; | |
380 | } | |
381 | } | |
382 | ||
383 | if (r >= 0) | |
384 | printf("\n%i overriden configuration files found.\n", n_found); | |
385 | ||
386 | finish: | |
387 | pager_close(); | |
388 | ||
389 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
390 | } |