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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; | |
866062b1 | 36 | static int arg_diff = -1; |
7e8d5761 | 37 | |
866062b1 | 38 | static enum { |
4c4e6431 | 39 | SHOW_MASKED = 1 << 0, |
c8021373 LP |
40 | SHOW_EQUIVALENT = 1 << 1, |
41 | SHOW_REDIRECTED = 1 << 2, | |
386da858 | 42 | SHOW_OVERRIDDEN = 1 << 3, |
4c4e6431 | 43 | SHOW_UNCHANGED = 1 << 4, |
4c4e6431 LP |
44 | |
45 | SHOW_DEFAULTS = | |
386da858 | 46 | (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN) |
866062b1 | 47 | } arg_flags = 0; |
4c4e6431 | 48 | |
7e8d5761 | 49 | static int equivalent(const char *a, const char *b) { |
e26970a8 | 50 | _cleanup_free_ char *x = NULL, *y = NULL; |
7e8d5761 LP |
51 | |
52 | x = canonicalize_file_name(a); | |
53 | if (!x) | |
54 | return -errno; | |
55 | ||
56 | y = canonicalize_file_name(b); | |
e26970a8 | 57 | if (!y) |
7e8d5761 | 58 | return -errno; |
7e8d5761 | 59 | |
e26970a8 | 60 | return path_equal(x, y); |
7e8d5761 LP |
61 | } |
62 | ||
866062b1 LP |
63 | static int notify_override_masked(const char *top, const char *bottom) { |
64 | if (!(arg_flags & SHOW_MASKED)) | |
807f4645 GN |
65 | return 0; |
66 | ||
c8021373 | 67 | printf(ANSI_HIGHLIGHT_RED_ON "[MASKED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); |
807f4645 GN |
68 | return 1; |
69 | } | |
70 | ||
866062b1 LP |
71 | static int notify_override_equivalent(const char *top, const char *bottom) { |
72 | if (!(arg_flags & SHOW_EQUIVALENT)) | |
807f4645 GN |
73 | return 0; |
74 | ||
75 | printf(ANSI_HIGHLIGHT_GREEN_ON "[EQUIVALENT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); | |
76 | return 1; | |
77 | } | |
78 | ||
866062b1 LP |
79 | static int notify_override_redirected(const char *top, const char *bottom) { |
80 | if (!(arg_flags & SHOW_REDIRECTED)) | |
807f4645 GN |
81 | return 0; |
82 | ||
c8021373 | 83 | printf(ANSI_HIGHLIGHT_ON "[REDIRECTED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); |
807f4645 GN |
84 | return 1; |
85 | } | |
86 | ||
386da858 NM |
87 | static int notify_override_overridden(const char *top, const char *bottom) { |
88 | if (!(arg_flags & SHOW_OVERRIDDEN)) | |
807f4645 GN |
89 | return 0; |
90 | ||
386da858 | 91 | printf(ANSI_HIGHLIGHT_ON "[OVERRIDDEN]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); |
807f4645 GN |
92 | return 1; |
93 | } | |
94 | ||
866062b1 LP |
95 | static int notify_override_unchanged(const char *f) { |
96 | if (!(arg_flags & SHOW_UNCHANGED)) | |
807f4645 GN |
97 | return 0; |
98 | ||
8e812a23 | 99 | printf("[UNCHANGED] %s\n", f); |
807f4645 GN |
100 | return 1; |
101 | } | |
102 | ||
866062b1 | 103 | static int found_override(const char *top, const char *bottom) { |
e26970a8 | 104 | _cleanup_free_ char *dest = NULL; |
7e8d5761 LP |
105 | int k; |
106 | pid_t pid; | |
107 | ||
108 | assert(top); | |
109 | assert(bottom); | |
110 | ||
111 | if (null_or_empty_path(top) > 0) { | |
866062b1 | 112 | notify_override_masked(top, bottom); |
e26970a8 | 113 | return 0; |
7e8d5761 LP |
114 | } |
115 | ||
116 | k = readlink_malloc(top, &dest); | |
117 | if (k >= 0) { | |
118 | if (equivalent(dest, bottom) > 0) | |
866062b1 | 119 | notify_override_equivalent(top, bottom); |
7e8d5761 | 120 | else |
866062b1 | 121 | notify_override_redirected(top, bottom); |
7e8d5761 | 122 | |
e26970a8 | 123 | return 0; |
7e8d5761 LP |
124 | } |
125 | ||
386da858 | 126 | notify_override_overridden(top, bottom); |
866062b1 | 127 | if (!arg_diff) |
e26970a8 | 128 | return 0; |
7e8d5761 LP |
129 | |
130 | putchar('\n'); | |
131 | ||
132 | fflush(stdout); | |
133 | ||
134 | pid = fork(); | |
135 | if (pid < 0) { | |
136 | log_error("Failed to fork off diff: %m"); | |
137 | return -errno; | |
138 | } else if (pid == 0) { | |
139 | execlp("diff", "diff", "-us", "--", bottom, top, NULL); | |
140 | log_error("Failed to execute diff: %m"); | |
141 | _exit(1); | |
142 | } | |
143 | ||
144 | wait_for_terminate(pid, NULL); | |
145 | ||
146 | putchar('\n'); | |
147 | ||
7e8d5761 LP |
148 | return 0; |
149 | } | |
150 | ||
151 | static int enumerate_dir(Hashmap *top, Hashmap *bottom, const char *path) { | |
e26970a8 | 152 | _cleanup_closedir_ DIR *d; |
7e8d5761 LP |
153 | |
154 | assert(top); | |
155 | assert(bottom); | |
156 | assert(path); | |
157 | ||
158 | d = opendir(path); | |
159 | if (!d) { | |
160 | if (errno == ENOENT) | |
161 | return 0; | |
162 | ||
163 | log_error("Failed to enumerate %s: %m", path); | |
164 | return -errno; | |
165 | } | |
166 | ||
167 | for (;;) { | |
7d5e9c0f LP |
168 | struct dirent *de; |
169 | union dirent_storage buf; | |
7e8d5761 LP |
170 | int k; |
171 | char *p; | |
172 | ||
7d5e9c0f | 173 | k = readdir_r(d, &buf.de, &de); |
e26970a8 TA |
174 | if (k != 0) |
175 | return -k; | |
7e8d5761 LP |
176 | |
177 | if (!de) | |
178 | break; | |
179 | ||
180 | if (!dirent_is_file(de)) | |
181 | continue; | |
182 | ||
b7def684 | 183 | p = strjoin(path, "/", de->d_name, NULL); |
e26970a8 TA |
184 | if (!p) |
185 | return -ENOMEM; | |
7e8d5761 LP |
186 | |
187 | path_kill_slashes(p); | |
188 | ||
189 | k = hashmap_put(top, path_get_file_name(p), p); | |
190 | if (k >= 0) { | |
191 | p = strdup(p); | |
e26970a8 TA |
192 | if (!p) |
193 | return -ENOMEM; | |
7e8d5761 LP |
194 | } else if (k != -EEXIST) { |
195 | free(p); | |
e26970a8 | 196 | return k; |
7e8d5761 LP |
197 | } |
198 | ||
199 | free(hashmap_remove(bottom, path_get_file_name(p))); | |
200 | k = hashmap_put(bottom, path_get_file_name(p), p); | |
201 | if (k < 0) { | |
202 | free(p); | |
e26970a8 | 203 | return k; |
7e8d5761 LP |
204 | } |
205 | } | |
206 | ||
e26970a8 | 207 | return 0; |
7e8d5761 LP |
208 | } |
209 | ||
866062b1 | 210 | static int process_suffix(const char *prefixes, const char *suffix) { |
7e8d5761 LP |
211 | const char *p; |
212 | char *f; | |
d966a7b3 | 213 | Hashmap *top, *bottom=NULL; |
7e8d5761 LP |
214 | int r = 0, k; |
215 | Iterator i; | |
216 | int n_found = 0; | |
217 | ||
218 | assert(prefixes); | |
219 | assert(suffix); | |
220 | ||
221 | top = hashmap_new(string_hash_func, string_compare_func); | |
222 | if (!top) { | |
223 | r = -ENOMEM; | |
224 | goto finish; | |
225 | } | |
226 | ||
227 | bottom = hashmap_new(string_hash_func, string_compare_func); | |
228 | if (!bottom) { | |
229 | r = -ENOMEM; | |
230 | goto finish; | |
231 | } | |
232 | ||
233 | NULSTR_FOREACH(p, prefixes) { | |
e26970a8 | 234 | _cleanup_free_ char *t = NULL; |
7e8d5761 | 235 | |
b7def684 | 236 | t = strjoin(p, "/", suffix, NULL); |
7e8d5761 LP |
237 | if (!t) { |
238 | r = -ENOMEM; | |
239 | goto finish; | |
240 | } | |
241 | ||
242 | k = enumerate_dir(top, bottom, t); | |
243 | if (k < 0) | |
244 | r = k; | |
245 | ||
246 | log_debug("Looking at %s", t); | |
7e8d5761 LP |
247 | } |
248 | ||
249 | HASHMAP_FOREACH(f, top, i) { | |
250 | char *o; | |
251 | ||
252 | o = hashmap_get(bottom, path_get_file_name(f)); | |
253 | assert(o); | |
254 | ||
807f4645 | 255 | if (path_equal(o, f)) { |
866062b1 | 256 | notify_override_unchanged(f); |
7e8d5761 | 257 | continue; |
807f4645 | 258 | } |
7e8d5761 | 259 | |
866062b1 | 260 | k = found_override(f, o); |
7e8d5761 LP |
261 | if (k < 0) |
262 | r = k; | |
263 | ||
264 | n_found ++; | |
265 | } | |
266 | ||
267 | finish: | |
268 | if (top) | |
269 | hashmap_free_free(top); | |
270 | if (bottom) | |
271 | hashmap_free_free(bottom); | |
272 | ||
273 | return r < 0 ? r : n_found; | |
274 | } | |
275 | ||
866062b1 | 276 | static int process_suffix_chop(const char *prefixes, const char *suffix) { |
7e8d5761 LP |
277 | const char *p; |
278 | ||
279 | assert(prefixes); | |
280 | assert(suffix); | |
281 | ||
282 | if (!path_is_absolute(suffix)) | |
866062b1 | 283 | return process_suffix(prefixes, suffix); |
7e8d5761 LP |
284 | |
285 | /* Strip prefix from the suffix */ | |
286 | NULSTR_FOREACH(p, prefixes) { | |
287 | if (startswith(suffix, p)) { | |
33b40551 | 288 | suffix += strlen(p); |
7e8d5761 | 289 | suffix += strspn(suffix, "/"); |
866062b1 | 290 | return process_suffix(prefixes, suffix); |
7e8d5761 LP |
291 | } |
292 | } | |
293 | ||
294 | log_error("Invalid suffix specification %s.", suffix); | |
295 | return -EINVAL; | |
296 | } | |
297 | ||
298 | static void help(void) { | |
299 | ||
300 | printf("%s [OPTIONS...] [SUFFIX...]\n\n" | |
301 | "Find overridden configuration files.\n\n" | |
302 | " -h --help Show this help\n" | |
303 | " --version Show package version\n" | |
807f4645 | 304 | " --no-pager Do not pipe output into a pager\n" |
386da858 | 305 | " --diff[=1|0] Show a diff when overridden files differ\n" |
807f4645 | 306 | " -t --type=LIST... Only display a selected set of override types\n", |
7e8d5761 LP |
307 | program_invocation_short_name); |
308 | } | |
309 | ||
866062b1 | 310 | static int parse_flags(const char *flag_str, int flags) { |
807f4645 GN |
311 | char *w, *state; |
312 | size_t l; | |
313 | ||
314 | FOREACH_WORD(w, l, flag_str, state) { | |
c0ef53aa | 315 | if (strncmp("masked", w, l) == 0) |
807f4645 | 316 | flags |= SHOW_MASKED; |
c0ef53aa | 317 | else if (strncmp ("equivalent", w, l) == 0) |
c8021373 | 318 | flags |= SHOW_EQUIVALENT; |
c0ef53aa | 319 | else if (strncmp("redirected", w, l) == 0) |
c8021373 | 320 | flags |= SHOW_REDIRECTED; |
386da858 NM |
321 | else if (strncmp("overridden", w, l) == 0) |
322 | flags |= SHOW_OVERRIDDEN; | |
c0ef53aa | 323 | else if (strncmp("unchanged", w, l) == 0) |
807f4645 | 324 | flags |= SHOW_UNCHANGED; |
c0ef53aa | 325 | else if (strncmp("default", w, l) == 0) |
807f4645 | 326 | flags |= SHOW_DEFAULTS; |
866062b1 LP |
327 | else |
328 | return -EINVAL; | |
807f4645 GN |
329 | } |
330 | return flags; | |
331 | } | |
332 | ||
866062b1 | 333 | static int parse_argv(int argc, char *argv[]) { |
7e8d5761 LP |
334 | |
335 | enum { | |
336 | ARG_NO_PAGER = 0x100, | |
807f4645 | 337 | ARG_DIFF, |
7e8d5761 LP |
338 | ARG_VERSION |
339 | }; | |
340 | ||
341 | static const struct option options[] = { | |
342 | { "help", no_argument, NULL, 'h' }, | |
343 | { "version", no_argument, NULL, ARG_VERSION }, | |
344 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
807f4645 GN |
345 | { "diff", optional_argument, NULL, ARG_DIFF }, |
346 | { "type", required_argument, NULL, 't' }, | |
7e8d5761 LP |
347 | { NULL, 0, NULL, 0 } |
348 | }; | |
349 | ||
350 | int c; | |
351 | ||
352 | assert(argc >= 1); | |
353 | assert(argv); | |
354 | ||
377ec8bf | 355 | while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) { |
7e8d5761 LP |
356 | |
357 | switch (c) { | |
358 | ||
359 | case 'h': | |
360 | help(); | |
361 | return 0; | |
362 | ||
363 | case ARG_VERSION: | |
364 | puts(PACKAGE_STRING); | |
7e8d5761 LP |
365 | puts(SYSTEMD_FEATURES); |
366 | return 0; | |
367 | ||
368 | case ARG_NO_PAGER: | |
369 | arg_no_pager = true; | |
370 | break; | |
371 | ||
372 | case '?': | |
373 | return -EINVAL; | |
374 | ||
866062b1 LP |
375 | case 't': { |
376 | int f; | |
377 | f = parse_flags(optarg, arg_flags); | |
378 | if (f < 0) { | |
379 | log_error("Failed to parse flags field."); | |
807f4645 | 380 | return -EINVAL; |
866062b1 LP |
381 | } |
382 | arg_flags = f; | |
807f4645 | 383 | break; |
866062b1 | 384 | } |
807f4645 GN |
385 | |
386 | case ARG_DIFF: | |
866062b1 LP |
387 | if (!optarg) |
388 | arg_diff = 1; | |
389 | else { | |
390 | int b; | |
391 | ||
392 | b = parse_boolean(optarg); | |
393 | if (b < 0) { | |
394 | log_error("Failed to parse diff boolean."); | |
395 | return -EINVAL; | |
396 | } else if (b) | |
397 | arg_diff = 1; | |
807f4645 | 398 | else |
866062b1 | 399 | arg_diff = 0; |
807f4645 GN |
400 | } |
401 | break; | |
402 | ||
7e8d5761 LP |
403 | default: |
404 | log_error("Unknown option code %c", c); | |
405 | return -EINVAL; | |
406 | } | |
407 | } | |
408 | ||
409 | return 1; | |
410 | } | |
411 | ||
412 | int main(int argc, char *argv[]) { | |
413 | ||
414 | const char prefixes[] = | |
415 | "/etc\0" | |
416 | "/run\0" | |
417 | "/usr/local/lib\0" | |
418 | "/usr/local/share\0" | |
419 | "/usr/lib\0" | |
420 | "/usr/share\0" | |
421 | #ifdef HAVE_SPLIT_USR | |
422 | "/lib\0" | |
423 | #endif | |
424 | ; | |
425 | ||
426 | const char suffixes[] = | |
427 | "sysctl.d\0" | |
428 | "tmpfiles.d\0" | |
429 | "modules-load.d\0" | |
3ea6e732 | 430 | "binfmt.d\0" |
7e8d5761 LP |
431 | "systemd/system\0" |
432 | "systemd/user\0" | |
a7480dba LP |
433 | "systemd/system-preset\0" |
434 | "systemd/user-preset\0" | |
7e8d5761 LP |
435 | "udev/rules.d\0" |
436 | "modprobe.d\0"; | |
437 | ||
438 | int r = 0, k; | |
439 | int n_found = 0; | |
440 | ||
441 | log_parse_environment(); | |
442 | log_open(); | |
443 | ||
866062b1 | 444 | r = parse_argv(argc, argv); |
7e8d5761 LP |
445 | if (r <= 0) |
446 | goto finish; | |
447 | ||
866062b1 LP |
448 | if (arg_flags == 0) |
449 | arg_flags = SHOW_DEFAULTS; | |
450 | ||
451 | if (arg_diff < 0) | |
386da858 | 452 | arg_diff = !!(arg_flags & SHOW_OVERRIDDEN); |
866062b1 | 453 | else if (arg_diff) |
386da858 | 454 | arg_flags |= SHOW_OVERRIDDEN; |
807f4645 | 455 | |
7e8d5761 LP |
456 | if (!arg_no_pager) |
457 | pager_open(); | |
458 | ||
459 | if (optind < argc) { | |
460 | int i; | |
461 | ||
462 | for (i = optind; i < argc; i++) { | |
866062b1 | 463 | k = process_suffix_chop(prefixes, argv[i]); |
7e8d5761 LP |
464 | if (k < 0) |
465 | r = k; | |
466 | else | |
467 | n_found += k; | |
468 | } | |
469 | ||
470 | } else { | |
471 | const char *n; | |
472 | ||
473 | NULSTR_FOREACH(n, suffixes) { | |
866062b1 | 474 | k = process_suffix(prefixes, n); |
7e8d5761 LP |
475 | if (k < 0) |
476 | r = k; | |
477 | else | |
478 | n_found += k; | |
479 | } | |
480 | } | |
481 | ||
482 | if (r >= 0) | |
386da858 | 483 | printf("\n%i overridden configuration files found.\n", n_found); |
7e8d5761 LP |
484 | |
485 | finish: | |
486 | pager_close(); | |
487 | ||
488 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
489 | } |