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(pid, NULL);
204 static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *toppath, const char *drop) {
205 _cleanup_free_ char *unit = NULL;
206 _cleanup_free_ char *path = NULL;
207 _cleanup_strv_free_ char **list = NULL;
212 assert(!endswith(drop, "/"));
214 path = strjoin(toppath, "/", drop, NULL);
218 log_debug("Looking at %s", path);
224 c = strrchr(unit, '.');
229 r = get_files_in_directory(path, &list);
231 log_error("Failed to enumerate %s: %s", path, strerror(-r));
235 STRV_FOREACH(file, list) {
241 if (!endswith(*file, ".conf"))
244 p = strjoin(path, "/", *file, NULL);
247 d = p + strlen(toppath) + 1;
249 log_debug("Adding at top: %s %s %s", d, draw_special_char(DRAW_ARROW), p);
250 k = hashmap_put(top, d, p);
255 d = p + strlen(toppath) + 1;
256 } else if (k != -EEXIST) {
261 log_debug("Adding at bottom: %s %s %s", d, draw_special_char(DRAW_ARROW), p);
262 free(hashmap_remove(bottom, d));
263 k = hashmap_put(bottom, d, p);
269 h = hashmap_get(drops, unit);
271 h = hashmap_new(string_hash_func, string_compare_func);
274 hashmap_put(drops, unit, h);
284 log_debug("Adding to drops: %s %s %s %s %s",
285 unit, draw_special_char(DRAW_ARROW), basename(p), draw_special_char(DRAW_ARROW), p);
286 k = hashmap_put(h, basename(p), p);
296 static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *path, bool dropins) {
297 _cleanup_closedir_ DIR *d;
304 log_debug("Looking at %s", path);
311 log_error("Failed to open %s: %m", path);
325 dirent_ensure_type(d, de);
327 if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d"))
328 enumerate_dir_d(top, bottom, drops, path, de->d_name);
330 if (!dirent_is_file(de))
333 p = strjoin(path, "/", de->d_name, NULL);
337 log_debug("Adding at top: %s %s %s", basename(p), draw_special_char(DRAW_ARROW), p);
338 k = hashmap_put(top, basename(p), p);
343 } else if (k != -EEXIST) {
348 log_debug("Adding at bottom: %s %s %s", basename(p), draw_special_char(DRAW_ARROW), p);
349 free(hashmap_remove(bottom, basename(p)));
350 k = hashmap_put(bottom, basename(p), p);
358 static int process_suffix(const char *suffix, const char *onlyprefix) {
361 Hashmap *top, *bottom, *drops;
370 assert(!startswith(suffix, "/"));
371 assert(!strstr(suffix, "//"));
373 dropins = nulstr_contains(have_dropins, suffix);
375 top = hashmap_new(string_hash_func, string_compare_func);
376 bottom = hashmap_new(string_hash_func, string_compare_func);
377 drops = hashmap_new(string_hash_func, string_compare_func);
378 if (!top || !bottom || !drops) {
383 NULSTR_FOREACH(p, prefixes) {
384 _cleanup_free_ char *t = NULL;
386 t = strjoin(p, "/", suffix, NULL);
392 k = enumerate_dir(top, bottom, drops, t, dropins);
397 HASHMAP_FOREACH_KEY(f, key, top, i) {
400 o = hashmap_get(bottom, key);
403 if (!onlyprefix || startswith(o, onlyprefix)) {
404 if (path_equal(o, f)) {
405 notify_override_unchanged(f);
407 k = found_override(f, o);
415 h = hashmap_get(drops, key);
417 HASHMAP_FOREACH(o, h, j)
418 if (!onlyprefix || startswith(o, onlyprefix))
419 n_found += notify_override_extended(f, o);
424 hashmap_free_free(top);
426 hashmap_free_free(bottom);
428 HASHMAP_FOREACH_KEY(h, key, drops, i){
429 hashmap_free_free(hashmap_remove(drops, key));
430 hashmap_remove(drops, key);
435 return r < 0 ? r : n_found;
438 static int process_suffixes(const char *onlyprefix) {
442 NULSTR_FOREACH(n, suffixes) {
443 r = process_suffix(n, onlyprefix);
452 static int process_suffix_chop(const char *arg) {
457 if (!path_is_absolute(arg))
458 return process_suffix(arg, NULL);
460 /* Strip prefix from the suffix */
461 NULSTR_FOREACH(p, prefixes) {
462 const char *suffix = startswith(arg, p);
464 suffix += strspn(suffix, "/");
466 return process_suffix(suffix, NULL);
468 return process_suffixes(arg);
472 log_error("Invalid suffix specification %s.", arg);
476 static void help(void) {
477 printf("%s [OPTIONS...] [SUFFIX...]\n\n"
478 "Find overridden configuration files.\n\n"
479 " -h --help Show this help\n"
480 " --version Show package version\n"
481 " --no-pager Do not pipe output into a pager\n"
482 " --diff[=1|0] Show a diff when overridden files differ\n"
483 " -t --type=LIST... Only display a selected set of override types\n"
484 , program_invocation_short_name);
487 static int parse_flags(const char *flag_str, int flags) {
488 const char *word, *state;
491 FOREACH_WORD(word, l, flag_str, state) {
492 if (strneq("masked", word, l))
493 flags |= SHOW_MASKED;
494 else if (strneq ("equivalent", word, l))
495 flags |= SHOW_EQUIVALENT;
496 else if (strneq("redirected", word, l))
497 flags |= SHOW_REDIRECTED;
498 else if (strneq("overridden", word, l))
499 flags |= SHOW_OVERRIDDEN;
500 else if (strneq("unchanged", word, l))
501 flags |= SHOW_UNCHANGED;
502 else if (strneq("extended", word, l))
503 flags |= SHOW_EXTENDED;
504 else if (strneq("default", word, l))
505 flags |= SHOW_DEFAULTS;
512 static int parse_argv(int argc, char *argv[]) {
515 ARG_NO_PAGER = 0x100,
520 static const struct option options[] = {
521 { "help", no_argument, NULL, 'h' },
522 { "version", no_argument, NULL, ARG_VERSION },
523 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
524 { "diff", optional_argument, NULL, ARG_DIFF },
525 { "type", required_argument, NULL, 't' },
534 while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0)
543 puts(PACKAGE_STRING);
544 puts(SYSTEMD_FEATURES);
553 f = parse_flags(optarg, arg_flags);
555 log_error("Failed to parse flags field.");
568 b = parse_boolean(optarg);
570 log_error("Failed to parse diff boolean.");
583 assert_not_reached("Unhandled option");
589 int main(int argc, char *argv[]) {
593 log_parse_environment();
596 r = parse_argv(argc, argv);
601 arg_flags = SHOW_DEFAULTS;
604 arg_diff = !!(arg_flags & SHOW_OVERRIDDEN);
606 arg_flags |= SHOW_OVERRIDDEN;
608 pager_open_if_enabled();
613 for (i = optind; i < argc; i++) {
614 path_kill_slashes(argv[i]);
615 k = process_suffix_chop(argv[i]);
623 k = process_suffixes(NULL);
631 printf("%s%i overridden configuration files found.\n",
632 n_found ? "\n" : "", n_found);
637 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;