1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
7 Copyright 2013 Zbigniew Jędrzejewski-Szmek
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include "path-util.h"
37 static const char prefixes[] =
49 static const char suffixes[] =
56 "systemd/system-preset\0"
57 "systemd/user-preset\0"
61 static const char have_dropins[] =
65 static bool arg_no_pager = false;
66 static int arg_diff = -1;
70 SHOW_EQUIVALENT = 1 << 1,
71 SHOW_REDIRECTED = 1 << 2,
72 SHOW_OVERRIDDEN = 1 << 3,
73 SHOW_UNCHANGED = 1 << 4,
74 SHOW_EXTENDED = 1 << 5,
77 (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN | SHOW_EXTENDED)
80 static void pager_open_if_enabled(void) {
88 static int equivalent(const char *a, const char *b) {
89 _cleanup_free_ char *x = NULL, *y = NULL;
91 x = canonicalize_file_name(a);
95 y = canonicalize_file_name(b);
99 return path_equal(x, y);
102 static int notify_override_masked(const char *top, const char *bottom) {
103 if (!(arg_flags & SHOW_MASKED))
106 printf("%s%s%s %s %s %s\n",
107 ansi_highlight_red(), "[MASKED]", ansi_highlight_off(),
108 top, draw_special_char(DRAW_ARROW), bottom);
112 static int notify_override_equivalent(const char *top, const char *bottom) {
113 if (!(arg_flags & SHOW_EQUIVALENT))
116 printf("%s%s%s %s %s %s\n",
117 ansi_highlight_green(), "[EQUIVALENT]", ansi_highlight_off(),
118 top, draw_special_char(DRAW_ARROW), bottom);
122 static int notify_override_redirected(const char *top, const char *bottom) {
123 if (!(arg_flags & SHOW_REDIRECTED))
126 printf("%s%s%s %s %s %s\n",
127 ansi_highlight(), "[REDIRECTED]", ansi_highlight_off(),
128 top, draw_special_char(DRAW_ARROW), bottom);
132 static int notify_override_overridden(const char *top, const char *bottom) {
133 if (!(arg_flags & SHOW_OVERRIDDEN))
136 printf("%s%s%s %s %s %s\n",
137 ansi_highlight(), "[OVERRIDDEN]", ansi_highlight_off(),
138 top, draw_special_char(DRAW_ARROW), bottom);
142 static int notify_override_extended(const char *top, const char *bottom) {
143 if (!(arg_flags & SHOW_EXTENDED))
146 printf("%s%s%s %s %s %s\n",
147 ansi_highlight(), "[EXTENDED]", ansi_highlight_off(),
148 top, draw_special_char(DRAW_ARROW), bottom);
152 static int notify_override_unchanged(const char *f) {
153 if (!(arg_flags & SHOW_UNCHANGED))
156 printf("[UNCHANGED] %s\n", f);
160 static int found_override(const char *top, const char *bottom) {
161 _cleanup_free_ char *dest = NULL;
168 if (null_or_empty_path(top) > 0)
169 return notify_override_masked(top, bottom);
171 k = readlink_malloc(top, &dest);
173 if (equivalent(dest, bottom) > 0)
174 return notify_override_equivalent(top, bottom);
176 return notify_override_redirected(top, bottom);
179 k = notify_override_overridden(top, bottom);
189 log_error("Failed to fork off diff: %m");
191 } else if (pid == 0) {
192 execlp("diff", "diff", "-us", "--", bottom, top, NULL);
193 log_error("Failed to execute diff: %m");
197 wait_for_terminate_and_warn("diff", pid);
203 static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *toppath, const char *drop) {
204 _cleanup_free_ char *unit = NULL;
205 _cleanup_free_ char *path = NULL;
206 _cleanup_strv_free_ char **list = NULL;
211 assert(!endswith(drop, "/"));
213 path = strjoin(toppath, "/", drop, NULL);
217 log_debug("Looking at %s", path);
223 c = strrchr(unit, '.');
228 r = get_files_in_directory(path, &list);
230 log_error("Failed to enumerate %s: %s", path, strerror(-r));
234 STRV_FOREACH(file, list) {
240 if (!endswith(*file, ".conf"))
243 p = strjoin(path, "/", *file, NULL);
246 d = p + strlen(toppath) + 1;
248 log_debug("Adding at top: %s %s %s", d, draw_special_char(DRAW_ARROW), p);
249 k = hashmap_put(top, d, p);
254 d = p + strlen(toppath) + 1;
255 } else if (k != -EEXIST) {
260 log_debug("Adding at bottom: %s %s %s", d, draw_special_char(DRAW_ARROW), p);
261 free(hashmap_remove(bottom, d));
262 k = hashmap_put(bottom, d, p);
268 h = hashmap_get(drops, unit);
270 h = hashmap_new(&string_hash_ops);
273 hashmap_put(drops, unit, h);
283 log_debug("Adding to drops: %s %s %s %s %s",
284 unit, draw_special_char(DRAW_ARROW), basename(p), draw_special_char(DRAW_ARROW), p);
285 k = hashmap_put(h, basename(p), p);
295 static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *path, bool dropins) {
296 _cleanup_closedir_ DIR *d;
303 log_debug("Looking at %s", path);
310 log_error("Failed to open %s: %m", path);
324 dirent_ensure_type(d, de);
326 if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d"))
327 enumerate_dir_d(top, bottom, drops, path, de->d_name);
329 if (!dirent_is_file(de))
332 p = strjoin(path, "/", de->d_name, NULL);
336 log_debug("Adding at top: %s %s %s", basename(p), draw_special_char(DRAW_ARROW), p);
337 k = hashmap_put(top, basename(p), p);
342 } else if (k != -EEXIST) {
347 log_debug("Adding at bottom: %s %s %s", basename(p), draw_special_char(DRAW_ARROW), p);
348 free(hashmap_remove(bottom, basename(p)));
349 k = hashmap_put(bottom, basename(p), p);
357 static int process_suffix(const char *suffix, const char *onlyprefix) {
360 Hashmap *top, *bottom, *drops;
369 assert(!startswith(suffix, "/"));
370 assert(!strstr(suffix, "//"));
372 dropins = nulstr_contains(have_dropins, suffix);
374 top = hashmap_new(&string_hash_ops);
375 bottom = hashmap_new(&string_hash_ops);
376 drops = hashmap_new(&string_hash_ops);
377 if (!top || !bottom || !drops) {
382 NULSTR_FOREACH(p, prefixes) {
383 _cleanup_free_ char *t = NULL;
385 t = strjoin(p, "/", suffix, NULL);
391 k = enumerate_dir(top, bottom, drops, t, dropins);
396 HASHMAP_FOREACH_KEY(f, key, top, i) {
399 o = hashmap_get(bottom, key);
402 if (!onlyprefix || startswith(o, onlyprefix)) {
403 if (path_equal(o, f)) {
404 notify_override_unchanged(f);
406 k = found_override(f, o);
414 h = hashmap_get(drops, key);
416 HASHMAP_FOREACH(o, h, j)
417 if (!onlyprefix || startswith(o, onlyprefix))
418 n_found += notify_override_extended(f, o);
423 hashmap_free_free(top);
425 hashmap_free_free(bottom);
427 HASHMAP_FOREACH_KEY(h, key, drops, i){
428 hashmap_free_free(hashmap_remove(drops, key));
429 hashmap_remove(drops, key);
434 return r < 0 ? r : n_found;
437 static int process_suffixes(const char *onlyprefix) {
441 NULSTR_FOREACH(n, suffixes) {
442 r = process_suffix(n, onlyprefix);
451 static int process_suffix_chop(const char *arg) {
456 if (!path_is_absolute(arg))
457 return process_suffix(arg, NULL);
459 /* Strip prefix from the suffix */
460 NULSTR_FOREACH(p, prefixes) {
461 const char *suffix = startswith(arg, p);
463 suffix += strspn(suffix, "/");
465 return process_suffix(suffix, NULL);
467 return process_suffixes(arg);
471 log_error("Invalid suffix specification %s.", arg);
475 static void help(void) {
476 printf("%s [OPTIONS...] [SUFFIX...]\n\n"
477 "Find overridden configuration files.\n\n"
478 " -h --help Show this help\n"
479 " --version Show package version\n"
480 " --no-pager Do not pipe output into a pager\n"
481 " --diff[=1|0] Show a diff when overridden files differ\n"
482 " -t --type=LIST... Only display a selected set of override types\n"
483 , program_invocation_short_name);
486 static int parse_flags(const char *flag_str, int flags) {
487 const char *word, *state;
490 FOREACH_WORD(word, l, flag_str, state) {
491 if (strneq("masked", word, l))
492 flags |= SHOW_MASKED;
493 else if (strneq ("equivalent", word, l))
494 flags |= SHOW_EQUIVALENT;
495 else if (strneq("redirected", word, l))
496 flags |= SHOW_REDIRECTED;
497 else if (strneq("overridden", word, l))
498 flags |= SHOW_OVERRIDDEN;
499 else if (strneq("unchanged", word, l))
500 flags |= SHOW_UNCHANGED;
501 else if (strneq("extended", word, l))
502 flags |= SHOW_EXTENDED;
503 else if (strneq("default", word, l))
504 flags |= SHOW_DEFAULTS;
511 static int parse_argv(int argc, char *argv[]) {
514 ARG_NO_PAGER = 0x100,
519 static const struct option options[] = {
520 { "help", no_argument, NULL, 'h' },
521 { "version", no_argument, NULL, ARG_VERSION },
522 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
523 { "diff", optional_argument, NULL, ARG_DIFF },
524 { "type", required_argument, NULL, 't' },
533 while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0)
542 puts(PACKAGE_STRING);
543 puts(SYSTEMD_FEATURES);
552 f = parse_flags(optarg, arg_flags);
554 log_error("Failed to parse flags field.");
567 b = parse_boolean(optarg);
569 log_error("Failed to parse diff boolean.");
582 assert_not_reached("Unhandled option");
588 int main(int argc, char *argv[]) {
592 log_parse_environment();
595 r = parse_argv(argc, argv);
600 arg_flags = SHOW_DEFAULTS;
603 arg_diff = !!(arg_flags & SHOW_OVERRIDDEN);
605 arg_flags |= SHOW_OVERRIDDEN;
607 pager_open_if_enabled();
612 for (i = optind; i < argc; i++) {
613 path_kill_slashes(argv[i]);
614 k = process_suffix_chop(argv[i]);
622 k = process_suffixes(NULL);
630 printf("%s%i overridden configuration files found.\n",
631 n_found ? "\n" : "", n_found);
636 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;