| /*** |
| This file is part of systemd. |
| |
| Copyright 2012 Lennart Poettering |
| Copyright 2013 Zbigniew Jędrzejewski-Szmek |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <getopt.h> |
| #include <string.h> |
| #include <sys/prctl.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "dirent-util.h" |
| #include "fd-util.h" |
| #include "fs-util.h" |
| #include "hashmap.h" |
| #include "locale-util.h" |
| #include "log.h" |
| #include "pager.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "process-util.h" |
| #include "signal-util.h" |
| #include "stat-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "terminal-util.h" |
| #include "util.h" |
| |
| static const char prefixes[] = |
| "/etc\0" |
| "/run\0" |
| "/usr/local/lib\0" |
| "/usr/local/share\0" |
| "/usr/lib\0" |
| "/usr/share\0" |
| #ifdef HAVE_SPLIT_USR |
| "/lib\0" |
| #endif |
| ; |
| |
| static const char suffixes[] = |
| "sysctl.d\0" |
| "tmpfiles.d\0" |
| "modules-load.d\0" |
| "binfmt.d\0" |
| "systemd/system\0" |
| "systemd/user\0" |
| "systemd/system-preset\0" |
| "systemd/user-preset\0" |
| "udev/rules.d\0" |
| "modprobe.d\0"; |
| |
| static const char have_dropins[] = |
| "systemd/system\0" |
| "systemd/user\0"; |
| |
| static bool arg_no_pager = false; |
| static int arg_diff = -1; |
| |
| static enum { |
| SHOW_MASKED = 1 << 0, |
| SHOW_EQUIVALENT = 1 << 1, |
| SHOW_REDIRECTED = 1 << 2, |
| SHOW_OVERRIDDEN = 1 << 3, |
| SHOW_UNCHANGED = 1 << 4, |
| SHOW_EXTENDED = 1 << 5, |
| |
| SHOW_DEFAULTS = |
| (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN | SHOW_EXTENDED) |
| } arg_flags = 0; |
| |
| static int equivalent(const char *a, const char *b) { |
| _cleanup_free_ char *x = NULL, *y = NULL; |
| int r; |
| |
| r = chase_symlinks(a, NULL, 0, &x); |
| if (r < 0) |
| return r; |
| |
| r = chase_symlinks(b, NULL, 0, &y); |
| if (r < 0) |
| return r; |
| |
| return path_equal(x, y); |
| } |
| |
| static int notify_override_masked(const char *top, const char *bottom) { |
| if (!(arg_flags & SHOW_MASKED)) |
| return 0; |
| |
| printf("%s%s%s %s %s %s\n", |
| ansi_highlight_red(), "[MASKED]", ansi_normal(), |
| top, special_glyph(ARROW), bottom); |
| return 1; |
| } |
| |
| static int notify_override_equivalent(const char *top, const char *bottom) { |
| if (!(arg_flags & SHOW_EQUIVALENT)) |
| return 0; |
| |
| printf("%s%s%s %s %s %s\n", |
| ansi_highlight_green(), "[EQUIVALENT]", ansi_normal(), |
| top, special_glyph(ARROW), bottom); |
| return 1; |
| } |
| |
| static int notify_override_redirected(const char *top, const char *bottom) { |
| if (!(arg_flags & SHOW_REDIRECTED)) |
| return 0; |
| |
| printf("%s%s%s %s %s %s\n", |
| ansi_highlight(), "[REDIRECTED]", ansi_normal(), |
| top, special_glyph(ARROW), bottom); |
| return 1; |
| } |
| |
| static int notify_override_overridden(const char *top, const char *bottom) { |
| if (!(arg_flags & SHOW_OVERRIDDEN)) |
| return 0; |
| |
| printf("%s%s%s %s %s %s\n", |
| ansi_highlight(), "[OVERRIDDEN]", ansi_normal(), |
| top, special_glyph(ARROW), bottom); |
| return 1; |
| } |
| |
| static int notify_override_extended(const char *top, const char *bottom) { |
| if (!(arg_flags & SHOW_EXTENDED)) |
| return 0; |
| |
| printf("%s%s%s %s %s %s\n", |
| ansi_highlight(), "[EXTENDED]", ansi_normal(), |
| top, special_glyph(ARROW), bottom); |
| return 1; |
| } |
| |
| static int notify_override_unchanged(const char *f) { |
| if (!(arg_flags & SHOW_UNCHANGED)) |
| return 0; |
| |
| printf("[UNCHANGED] %s\n", f); |
| return 1; |
| } |
| |
| static int found_override(const char *top, const char *bottom) { |
| _cleanup_free_ char *dest = NULL; |
| int k; |
| pid_t pid; |
| |
| assert(top); |
| assert(bottom); |
| |
| if (null_or_empty_path(top) > 0) |
| return notify_override_masked(top, bottom); |
| |
| k = readlink_malloc(top, &dest); |
| if (k >= 0) { |
| if (equivalent(dest, bottom) > 0) |
| return notify_override_equivalent(top, bottom); |
| else |
| return notify_override_redirected(top, bottom); |
| } |
| |
| k = notify_override_overridden(top, bottom); |
| if (!arg_diff) |
| return k; |
| |
| putchar('\n'); |
| |
| fflush(stdout); |
| |
| pid = fork(); |
| if (pid < 0) |
| return log_error_errno(errno, "Failed to fork off diff: %m"); |
| else if (pid == 0) { |
| |
| (void) reset_all_signal_handlers(); |
| (void) reset_signal_mask(); |
| assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
| |
| execlp("diff", "diff", "-us", "--", bottom, top, NULL); |
| log_error_errno(errno, "Failed to execute diff: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| wait_for_terminate_and_warn("diff", pid, false); |
| putchar('\n'); |
| |
| return k; |
| } |
| |
| static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *toppath, const char *drop) { |
| _cleanup_free_ char *unit = NULL; |
| _cleanup_free_ char *path = NULL; |
| _cleanup_strv_free_ char **list = NULL; |
| char **file; |
| char *c; |
| int r; |
| |
| assert(!endswith(drop, "/")); |
| |
| path = strjoin(toppath, "/", drop); |
| if (!path) |
| return -ENOMEM; |
| |
| log_debug("Looking at %s", path); |
| |
| unit = strdup(drop); |
| if (!unit) |
| return -ENOMEM; |
| |
| c = strrchr(unit, '.'); |
| if (!c) |
| return -EINVAL; |
| *c = 0; |
| |
| r = get_files_in_directory(path, &list); |
| if (r < 0) |
| return log_error_errno(r, "Failed to enumerate %s: %m", path); |
| |
| STRV_FOREACH(file, list) { |
| Hashmap *h; |
| int k; |
| char *p; |
| char *d; |
| |
| if (!endswith(*file, ".conf")) |
| continue; |
| |
| p = strjoin(path, "/", *file); |
| if (!p) |
| return -ENOMEM; |
| d = p + strlen(toppath) + 1; |
| |
| log_debug("Adding at top: %s %s %s", d, special_glyph(ARROW), p); |
| k = hashmap_put(top, d, p); |
| if (k >= 0) { |
| p = strdup(p); |
| if (!p) |
| return -ENOMEM; |
| d = p + strlen(toppath) + 1; |
| } else if (k != -EEXIST) { |
| free(p); |
| return k; |
| } |
| |
| log_debug("Adding at bottom: %s %s %s", d, special_glyph(ARROW), p); |
| free(hashmap_remove(bottom, d)); |
| k = hashmap_put(bottom, d, p); |
| if (k < 0) { |
| free(p); |
| return k; |
| } |
| |
| h = hashmap_get(drops, unit); |
| if (!h) { |
| h = hashmap_new(&string_hash_ops); |
| if (!h) |
| return -ENOMEM; |
| hashmap_put(drops, unit, h); |
| unit = strdup(unit); |
| if (!unit) |
| return -ENOMEM; |
| } |
| |
| p = strdup(p); |
| if (!p) |
| return -ENOMEM; |
| |
| log_debug("Adding to drops: %s %s %s %s %s", |
| unit, special_glyph(ARROW), basename(p), special_glyph(ARROW), p); |
| k = hashmap_put(h, basename(p), p); |
| if (k < 0) { |
| free(p); |
| if (k != -EEXIST) |
| return k; |
| } |
| } |
| return 0; |
| } |
| |
| static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *path, bool dropins) { |
| _cleanup_closedir_ DIR *d; |
| struct dirent *de; |
| |
| assert(top); |
| assert(bottom); |
| assert(drops); |
| assert(path); |
| |
| log_debug("Looking at %s", path); |
| |
| d = opendir(path); |
| if (!d) { |
| if (errno == ENOENT) |
| return 0; |
| |
| return log_error_errno(errno, "Failed to open %s: %m", path); |
| } |
| |
| FOREACH_DIRENT_ALL(de, d, return -errno) { |
| int k; |
| char *p; |
| |
| dirent_ensure_type(d, de); |
| |
| if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d")) |
| enumerate_dir_d(top, bottom, drops, path, de->d_name); |
| |
| if (!dirent_is_file(de)) |
| continue; |
| |
| p = strjoin(path, "/", de->d_name); |
| if (!p) |
| return -ENOMEM; |
| |
| log_debug("Adding at top: %s %s %s", basename(p), special_glyph(ARROW), p); |
| k = hashmap_put(top, basename(p), p); |
| if (k >= 0) { |
| p = strdup(p); |
| if (!p) |
| return -ENOMEM; |
| } else if (k != -EEXIST) { |
| free(p); |
| return k; |
| } |
| |
| log_debug("Adding at bottom: %s %s %s", basename(p), special_glyph(ARROW), p); |
| free(hashmap_remove(bottom, basename(p))); |
| k = hashmap_put(bottom, basename(p), p); |
| if (k < 0) { |
| free(p); |
| return k; |
| } |
| } |
| return 0; |
| } |
| |
| static int should_skip_prefix(const char* p) { |
| #ifdef HAVE_SPLIT_USR |
| int r; |
| _cleanup_free_ char *target = NULL; |
| |
| r = chase_symlinks(p, NULL, 0, &target); |
| if (r < 0) |
| return r; |
| |
| return !streq(p, target) && nulstr_contains(prefixes, target); |
| #else |
| return 0; |
| #endif |
| } |
| |
| static int process_suffix(const char *suffix, const char *onlyprefix) { |
| const char *p; |
| char *f; |
| Hashmap *top, *bottom, *drops; |
| Hashmap *h; |
| char *key; |
| int r = 0, k; |
| Iterator i, j; |
| int n_found = 0; |
| bool dropins; |
| |
| assert(suffix); |
| assert(!startswith(suffix, "/")); |
| assert(!strstr(suffix, "//")); |
| |
| dropins = nulstr_contains(have_dropins, suffix); |
| |
| top = hashmap_new(&string_hash_ops); |
| bottom = hashmap_new(&string_hash_ops); |
| drops = hashmap_new(&string_hash_ops); |
| if (!top || !bottom || !drops) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| NULSTR_FOREACH(p, prefixes) { |
| _cleanup_free_ char *t = NULL; |
| int skip; |
| |
| skip = should_skip_prefix(p); |
| if (skip < 0) { |
| r = skip; |
| goto finish; |
| } |
| if (skip) |
| continue; |
| |
| t = strjoin(p, "/", suffix); |
| if (!t) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| k = enumerate_dir(top, bottom, drops, t, dropins); |
| if (r == 0) |
| r = k; |
| } |
| |
| HASHMAP_FOREACH_KEY(f, key, top, i) { |
| char *o; |
| |
| o = hashmap_get(bottom, key); |
| assert(o); |
| |
| if (!onlyprefix || startswith(o, onlyprefix)) { |
| if (path_equal(o, f)) { |
| notify_override_unchanged(f); |
| } else { |
| k = found_override(f, o); |
| if (k < 0) |
| r = k; |
| else |
| n_found += k; |
| } |
| } |
| |
| h = hashmap_get(drops, key); |
| if (h) |
| HASHMAP_FOREACH(o, h, j) |
| if (!onlyprefix || startswith(o, onlyprefix)) |
| n_found += notify_override_extended(f, o); |
| } |
| |
| finish: |
| hashmap_free_free(top); |
| hashmap_free_free(bottom); |
| |
| HASHMAP_FOREACH_KEY(h, key, drops, i) { |
| hashmap_free_free(hashmap_remove(drops, key)); |
| hashmap_remove(drops, key); |
| free(key); |
| } |
| hashmap_free(drops); |
| |
| return r < 0 ? r : n_found; |
| } |
| |
| static int process_suffixes(const char *onlyprefix) { |
| const char *n; |
| int n_found = 0, r; |
| |
| NULSTR_FOREACH(n, suffixes) { |
| r = process_suffix(n, onlyprefix); |
| if (r < 0) |
| return r; |
| |
| n_found += r; |
| } |
| |
| return n_found; |
| } |
| |
| static int process_suffix_chop(const char *arg) { |
| const char *p; |
| |
| assert(arg); |
| |
| if (!path_is_absolute(arg)) |
| return process_suffix(arg, NULL); |
| |
| /* Strip prefix from the suffix */ |
| NULSTR_FOREACH(p, prefixes) { |
| const char *suffix; |
| int skip; |
| |
| skip = should_skip_prefix(p); |
| if (skip < 0) |
| return skip; |
| if (skip) |
| continue; |
| |
| suffix = startswith(arg, p); |
| if (suffix) { |
| suffix += strspn(suffix, "/"); |
| if (*suffix) |
| return process_suffix(suffix, NULL); |
| else |
| return process_suffixes(arg); |
| } |
| } |
| |
| log_error("Invalid suffix specification %s.", arg); |
| return -EINVAL; |
| } |
| |
| static void help(void) { |
| printf("%s [OPTIONS...] [SUFFIX...]\n\n" |
| "Find overridden configuration files.\n\n" |
| " -h --help Show this help\n" |
| " --version Show package version\n" |
| " --no-pager Do not pipe output into a pager\n" |
| " --diff[=1|0] Show a diff when overridden files differ\n" |
| " -t --type=LIST... Only display a selected set of override types\n" |
| , program_invocation_short_name); |
| } |
| |
| static int parse_flags(const char *flag_str, int flags) { |
| const char *word, *state; |
| size_t l; |
| |
| FOREACH_WORD_SEPARATOR(word, l, flag_str, ",", state) { |
| if (strneq("masked", word, l)) |
| flags |= SHOW_MASKED; |
| else if (strneq ("equivalent", word, l)) |
| flags |= SHOW_EQUIVALENT; |
| else if (strneq("redirected", word, l)) |
| flags |= SHOW_REDIRECTED; |
| else if (strneq("overridden", word, l)) |
| flags |= SHOW_OVERRIDDEN; |
| else if (strneq("unchanged", word, l)) |
| flags |= SHOW_UNCHANGED; |
| else if (strneq("extended", word, l)) |
| flags |= SHOW_EXTENDED; |
| else if (strneq("default", word, l)) |
| flags |= SHOW_DEFAULTS; |
| else |
| return -EINVAL; |
| } |
| return flags; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| |
| enum { |
| ARG_NO_PAGER = 0x100, |
| ARG_DIFF, |
| ARG_VERSION |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
| { "diff", optional_argument, NULL, ARG_DIFF }, |
| { "type", required_argument, NULL, 't' }, |
| {} |
| }; |
| |
| int c; |
| |
| assert(argc >= 1); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) |
| |
| switch (c) { |
| |
| case 'h': |
| help(); |
| return 0; |
| |
| case ARG_VERSION: |
| return version(); |
| |
| case ARG_NO_PAGER: |
| arg_no_pager = true; |
| break; |
| |
| case 't': { |
| int f; |
| f = parse_flags(optarg, arg_flags); |
| if (f < 0) { |
| log_error("Failed to parse flags field."); |
| return -EINVAL; |
| } |
| arg_flags = f; |
| break; |
| } |
| |
| case ARG_DIFF: |
| if (!optarg) |
| arg_diff = 1; |
| else { |
| int b; |
| |
| b = parse_boolean(optarg); |
| if (b < 0) { |
| log_error("Failed to parse diff boolean."); |
| return -EINVAL; |
| } |
| |
| arg_diff = b; |
| } |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unhandled option"); |
| } |
| |
| return 1; |
| } |
| |
| int main(int argc, char *argv[]) { |
| int r, k, n_found = 0; |
| |
| log_parse_environment(); |
| log_open(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| goto finish; |
| |
| if (arg_flags == 0) |
| arg_flags = SHOW_DEFAULTS; |
| |
| if (arg_diff < 0) |
| arg_diff = !!(arg_flags & SHOW_OVERRIDDEN); |
| else if (arg_diff) |
| arg_flags |= SHOW_OVERRIDDEN; |
| |
| pager_open(arg_no_pager, false); |
| |
| if (optind < argc) { |
| int i; |
| |
| for (i = optind; i < argc; i++) { |
| path_kill_slashes(argv[i]); |
| |
| k = process_suffix_chop(argv[i]); |
| if (k < 0) |
| r = k; |
| else |
| n_found += k; |
| } |
| |
| } else { |
| k = process_suffixes(NULL); |
| if (k < 0) |
| r = k; |
| else |
| n_found += k; |
| } |
| |
| if (r >= 0) |
| printf("%s%i overridden configuration files found.\n", n_found ? "\n" : "", n_found); |
| |
| finish: |
| pager_close(); |
| |
| return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |