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\n",
107 ansi_highlight_red(), "[MASKED]", ansi_highlight_off(), top, bottom);
111 static int notify_override_equivalent(const char *top, const char *bottom) {
112 if (!(arg_flags & SHOW_EQUIVALENT))
115 printf("%s%s%s %s → %s\n",
116 ansi_highlight_green(), "[EQUIVALENT]", ansi_highlight_off(), top, bottom);
120 static int notify_override_redirected(const char *top, const char *bottom) {
121 if (!(arg_flags & SHOW_REDIRECTED))
124 printf("%s%s%s %s → %s\n",
125 ansi_highlight(), "[REDIRECTED]", ansi_highlight_off(), top, bottom);
129 static int notify_override_overridden(const char *top, const char *bottom) {
130 if (!(arg_flags & SHOW_OVERRIDDEN))
133 printf("%s%s%s %s → %s\n",
134 ansi_highlight(), "[OVERRIDDEN]", ansi_highlight_off(), top, bottom);
138 static int notify_override_extended(const char *top, const char *bottom) {
139 if (!(arg_flags & SHOW_EXTENDED))
142 printf("%s%s%s %s → %s\n",
143 ansi_highlight(), "[EXTENDED]", ansi_highlight_off(), top, bottom);
147 static int notify_override_unchanged(const char *f) {
148 if (!(arg_flags & SHOW_UNCHANGED))
151 printf("[UNCHANGED] %s\n", f);
155 static int found_override(const char *top, const char *bottom) {
156 _cleanup_free_ char *dest = NULL;
163 if (null_or_empty_path(top) > 0)
164 return notify_override_masked(top, bottom);
166 k = readlink_malloc(top, &dest);
168 if (equivalent(dest, bottom) > 0)
169 return notify_override_equivalent(top, bottom);
171 return notify_override_redirected(top, bottom);
174 k = notify_override_overridden(top, bottom);
184 log_error("Failed to fork off diff: %m");
186 } else if (pid == 0) {
187 execlp("diff", "diff", "-us", "--", bottom, top, NULL);
188 log_error("Failed to execute diff: %m");
192 wait_for_terminate(pid, NULL);
199 static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *toppath, const char *drop) {
200 _cleanup_free_ char *unit = NULL;
201 _cleanup_free_ char *path = NULL;
202 _cleanup_strv_free_ char **list = NULL;
207 assert(!endswith(drop, "/"));
209 path = strjoin(toppath, "/", drop, NULL);
213 log_debug("Looking at %s", path);
219 c = strrchr(unit, '.');
224 r = get_files_in_directory(path, &list);
226 log_error("Failed to enumerate %s: %s", path, strerror(-r));
230 STRV_FOREACH(file, list) {
236 if (!endswith(*file, ".conf"))
239 p = strjoin(path, "/", *file, NULL);
242 d = p + strlen(toppath) + 1;
244 log_debug("Adding at top: %s → %s", d, p);
245 k = hashmap_put(top, d, p);
250 d = p + strlen(toppath) + 1;
251 } else if (k != -EEXIST) {
256 log_debug("Adding at bottom: %s → %s", d, p);
257 free(hashmap_remove(bottom, d));
258 k = hashmap_put(bottom, d, p);
264 h = hashmap_get(drops, unit);
266 h = hashmap_new(string_hash_func, string_compare_func);
269 hashmap_put(drops, unit, h);
279 log_debug("Adding to drops: %s → %s → %s", unit, basename(p), p);
280 k = hashmap_put(h, basename(p), p);
290 static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *path, bool dropins) {
291 _cleanup_closedir_ DIR *d;
298 log_debug("Looking at %s", path);
305 log_error("Failed to open %s: %m", path);
319 if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d"))
320 enumerate_dir_d(top, bottom, drops, path, de->d_name);
322 if (!dirent_is_file(de))
325 p = strjoin(path, "/", de->d_name, NULL);
329 log_debug("Adding at top: %s → %s", basename(p), p);
330 k = hashmap_put(top, basename(p), p);
335 } else if (k != -EEXIST) {
340 log_debug("Adding at bottom: %s → %s", basename(p), p);
341 free(hashmap_remove(bottom, basename(p)));
342 k = hashmap_put(bottom, basename(p), p);
350 static int process_suffix(const char *suffix, const char *onlyprefix) {
353 Hashmap *top, *bottom, *drops;
362 assert(!startswith(suffix, "/"));
363 assert(!strstr(suffix, "//"));
365 dropins = nulstr_contains(have_dropins, suffix);
367 top = hashmap_new(string_hash_func, string_compare_func);
368 bottom = hashmap_new(string_hash_func, string_compare_func);
369 drops = hashmap_new(string_hash_func, string_compare_func);
370 if (!top || !bottom || !drops) {
375 NULSTR_FOREACH(p, prefixes) {
376 _cleanup_free_ char *t = NULL;
378 t = strjoin(p, "/", suffix, NULL);
384 k = enumerate_dir(top, bottom, drops, t, dropins);
389 HASHMAP_FOREACH_KEY(f, key, top, i) {
392 o = hashmap_get(bottom, key);
395 if (!onlyprefix || startswith(o, onlyprefix)) {
396 if (path_equal(o, f)) {
397 notify_override_unchanged(f);
399 k = found_override(f, o);
407 h = hashmap_get(drops, key);
409 HASHMAP_FOREACH(o, h, j)
410 if (!onlyprefix || startswith(o, onlyprefix))
411 n_found += notify_override_extended(f, o);
416 hashmap_free_free(top);
418 hashmap_free_free(bottom);
420 HASHMAP_FOREACH_KEY(h, key, drops, i){
421 hashmap_free_free(hashmap_remove(drops, key));
422 hashmap_remove(drops, key);
427 return r < 0 ? r : n_found;
430 static int process_suffixes(const char *onlyprefix) {
434 NULSTR_FOREACH(n, suffixes) {
435 r = process_suffix(n, onlyprefix);
444 static int process_suffix_chop(const char *arg) {
449 if (!path_is_absolute(arg))
450 return process_suffix(arg, NULL);
452 /* Strip prefix from the suffix */
453 NULSTR_FOREACH(p, prefixes) {
454 const char *suffix = startswith(arg, p);
456 suffix += strspn(suffix, "/");
458 return process_suffix(suffix, NULL);
460 return process_suffixes(arg);
464 log_error("Invalid suffix specification %s.", arg);
468 static int help(void) {
470 printf("%s [OPTIONS...] [SUFFIX...]\n\n"
471 "Find overridden configuration files.\n\n"
472 " -h --help Show this help\n"
473 " --version Show package version\n"
474 " --no-pager Do not pipe output into a pager\n"
475 " --diff[=1|0] Show a diff when overridden files differ\n"
476 " -t --type=LIST... Only display a selected set of override types\n",
477 program_invocation_short_name);
482 static int parse_flags(const char *flag_str, int flags) {
486 FOREACH_WORD(w, l, flag_str, state) {
487 if (strneq("masked", w, l))
488 flags |= SHOW_MASKED;
489 else if (strneq ("equivalent", w, l))
490 flags |= SHOW_EQUIVALENT;
491 else if (strneq("redirected", w, l))
492 flags |= SHOW_REDIRECTED;
493 else if (strneq("overridden", w, l))
494 flags |= SHOW_OVERRIDDEN;
495 else if (strneq("unchanged", w, l))
496 flags |= SHOW_UNCHANGED;
497 else if (strneq("extended", w, l))
498 flags |= SHOW_EXTENDED;
499 else if (strneq("default", w, l))
500 flags |= SHOW_DEFAULTS;
507 static int parse_argv(int argc, char *argv[]) {
510 ARG_NO_PAGER = 0x100,
515 static const struct option options[] = {
516 { "help", no_argument, NULL, 'h' },
517 { "version", no_argument, NULL, ARG_VERSION },
518 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
519 { "diff", optional_argument, NULL, ARG_DIFF },
520 { "type", required_argument, NULL, 't' },
529 while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) {
538 puts(PACKAGE_STRING);
539 puts(SYSTEMD_FEATURES);
548 f = parse_flags(optarg, arg_flags);
550 log_error("Failed to parse flags field.");
563 b = parse_boolean(optarg);
565 log_error("Failed to parse diff boolean.");
578 assert_not_reached("Unhandled option");
585 int main(int argc, char *argv[]) {
589 log_parse_environment();
592 r = parse_argv(argc, argv);
597 arg_flags = SHOW_DEFAULTS;
600 arg_diff = !!(arg_flags & SHOW_OVERRIDDEN);
602 arg_flags |= SHOW_OVERRIDDEN;
604 pager_open_if_enabled();
609 for (i = optind; i < argc; i++) {
610 path_kill_slashes(argv[i]);
611 k = process_suffix_chop(argv[i]);
619 k = process_suffixes(NULL);
627 printf("%s%i overridden configuration files found.\n",
628 n_found ? "\n" : "", n_found);
633 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;