/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2012 Lennart Poettering 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 <assert.h> #include <string.h> #include <unistd.h> #include <getopt.h> #include "hashmap.h" #include "util.h" #include "path-util.h" #include "log.h" #include "pager.h" #include "build.h" 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_DEFAULTS = (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN) } arg_flags = 0; static int equivalent(const char *a, const char *b) { _cleanup_free_ char *x = NULL, *y = NULL; x = canonicalize_file_name(a); if (!x) return -errno; y = canonicalize_file_name(b); if (!y) return -errno; return path_equal(x, y); } static int notify_override_masked(const char *top, const char *bottom) { if (!(arg_flags & SHOW_MASKED)) return 0; printf(ANSI_HIGHLIGHT_RED_ON "[MASKED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); return 1; } static int notify_override_equivalent(const char *top, const char *bottom) { if (!(arg_flags & SHOW_EQUIVALENT)) return 0; printf(ANSI_HIGHLIGHT_GREEN_ON "[EQUIVALENT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); return 1; } static int notify_override_redirected(const char *top, const char *bottom) { if (!(arg_flags & SHOW_REDIRECTED)) return 0; printf(ANSI_HIGHLIGHT_ON "[REDIRECTED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); return 1; } static int notify_override_overridden(const char *top, const char *bottom) { if (!(arg_flags & SHOW_OVERRIDDEN)) return 0; printf(ANSI_HIGHLIGHT_ON "[OVERRIDDEN]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, 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) { notify_override_masked(top, bottom); return 0; } k = readlink_malloc(top, &dest); if (k >= 0) { if (equivalent(dest, bottom) > 0) notify_override_equivalent(top, bottom); else notify_override_redirected(top, bottom); return 0; } notify_override_overridden(top, bottom); if (!arg_diff) return 0; putchar('\n'); fflush(stdout); pid = fork(); if (pid < 0) { log_error("Failed to fork off diff: %m"); return -errno; } else if (pid == 0) { execlp("diff", "diff", "-us", "--", bottom, top, NULL); log_error("Failed to execute diff: %m"); _exit(1); } wait_for_terminate(pid, NULL); putchar('\n'); return 0; } static int enumerate_dir(Hashmap *top, Hashmap *bottom, const char *path) { _cleanup_closedir_ DIR *d; assert(top); assert(bottom); assert(path); d = opendir(path); if (!d) { if (errno == ENOENT) return 0; log_error("Failed to enumerate %s: %m", path); return -errno; } for (;;) { struct dirent *de; union dirent_storage buf; int k; char *p; k = readdir_r(d, &buf.de, &de); if (k != 0) return -k; if (!de) break; if (!dirent_is_file(de)) continue; p = strjoin(path, "/", de->d_name, NULL); if (!p) return -ENOMEM; path_kill_slashes(p); k = hashmap_put(top, path_get_file_name(p), p); if (k >= 0) { p = strdup(p); if (!p) return -ENOMEM; } else if (k != -EEXIST) { free(p); return k; } free(hashmap_remove(bottom, path_get_file_name(p))); k = hashmap_put(bottom, path_get_file_name(p), p); if (k < 0) { free(p); return k; } } return 0; } static int process_suffix(const char *prefixes, const char *suffix) { const char *p; char *f; Hashmap *top, *bottom=NULL; int r = 0, k; Iterator i; int n_found = 0; assert(prefixes); assert(suffix); top = hashmap_new(string_hash_func, string_compare_func); if (!top) { r = -ENOMEM; goto finish; } bottom = hashmap_new(string_hash_func, string_compare_func); if (!bottom) { r = -ENOMEM; goto finish; } NULSTR_FOREACH(p, prefixes) { _cleanup_free_ char *t = NULL; t = strjoin(p, "/", suffix, NULL); if (!t) { r = -ENOMEM; goto finish; } k = enumerate_dir(top, bottom, t); if (k < 0) r = k; log_debug("Looking at %s", t); } HASHMAP_FOREACH(f, top, i) { char *o; o = hashmap_get(bottom, path_get_file_name(f)); assert(o); if (path_equal(o, f)) { notify_override_unchanged(f); continue; } k = found_override(f, o); if (k < 0) r = k; n_found ++; } finish: if (top) hashmap_free_free(top); if (bottom) hashmap_free_free(bottom); return r < 0 ? r : n_found; } static int process_suffix_chop(const char *prefixes, const char *suffix) { const char *p; assert(prefixes); assert(suffix); if (!path_is_absolute(suffix)) return process_suffix(prefixes, suffix); /* Strip prefix from the suffix */ NULSTR_FOREACH(p, prefixes) { if (startswith(suffix, p)) { suffix += strlen(p); suffix += strspn(suffix, "/"); return process_suffix(prefixes, suffix); } } log_error("Invalid suffix specification %s.", suffix); 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) { char *w, *state; size_t l; FOREACH_WORD(w, l, flag_str, state) { if (strneq("masked", w, l)) flags |= SHOW_MASKED; else if (strneq ("equivalent", w, l)) flags |= SHOW_EQUIVALENT; else if (strneq("redirected", w, l)) flags |= SHOW_REDIRECTED; else if (strneq("overridden", w, l)) flags |= SHOW_OVERRIDDEN; else if (strneq("unchanged", w, l)) flags |= SHOW_UNCHANGED; else if (strneq("default", w, 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' }, { NULL, 0, NULL, 0 } }; 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: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_NO_PAGER: arg_no_pager = true; break; case '?': return -EINVAL; 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; } else if (b) arg_diff = 1; else arg_diff = 0; } break; default: log_error("Unknown option code %c", c); return -EINVAL; } } return 1; } int main(int argc, char *argv[]) { 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 ; 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"; int r = 0, k; int 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; if (!arg_no_pager) pager_open(); if (optind < argc) { int i; for (i = optind; i < argc; i++) { k = process_suffix_chop(prefixes, argv[i]); if (k < 0) r = k; else n_found += k; } } else { const char *n; NULSTR_FOREACH(n, suffixes) { k = process_suffix(prefixes, n); if (k < 0) r = k; else n_found += k; } } if (r >= 0) printf("\n%i overridden configuration files found.\n", n_found); finish: pager_close(); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }