491 lines
14 KiB
C
491 lines
14 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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#include "hashmap.h"
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#include "util.h"
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#include "path-util.h"
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#include "log.h"
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#include "pager.h"
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#include "build.h"
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static bool arg_no_pager = false;
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static int arg_diff = -1;
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static enum {
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SHOW_MASKED = 1 << 0,
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SHOW_EQUIVALENT = 1 << 1,
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SHOW_REDIRECTED = 1 << 2,
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SHOW_OVERRIDDEN = 1 << 3,
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SHOW_UNCHANGED = 1 << 4,
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SHOW_DEFAULTS =
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(SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN)
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} arg_flags = 0;
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static int equivalent(const char *a, const char *b) {
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_cleanup_free_ char *x = NULL, *y = NULL;
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x = canonicalize_file_name(a);
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if (!x)
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return -errno;
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y = canonicalize_file_name(b);
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if (!y)
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return -errno;
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return path_equal(x, y);
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}
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static int notify_override_masked(const char *top, const char *bottom) {
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if (!(arg_flags & SHOW_MASKED))
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return 0;
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printf(ANSI_HIGHLIGHT_RED_ON "[MASKED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom);
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return 1;
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}
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static int notify_override_equivalent(const char *top, const char *bottom) {
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if (!(arg_flags & SHOW_EQUIVALENT))
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return 0;
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printf(ANSI_HIGHLIGHT_GREEN_ON "[EQUIVALENT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom);
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return 1;
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}
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static int notify_override_redirected(const char *top, const char *bottom) {
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if (!(arg_flags & SHOW_REDIRECTED))
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return 0;
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printf(ANSI_HIGHLIGHT_ON "[REDIRECTED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom);
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return 1;
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}
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static int notify_override_overridden(const char *top, const char *bottom) {
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if (!(arg_flags & SHOW_OVERRIDDEN))
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return 0;
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printf(ANSI_HIGHLIGHT_ON "[OVERRIDDEN]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom);
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return 1;
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}
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static int notify_override_unchanged(const char *f) {
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if (!(arg_flags & SHOW_UNCHANGED))
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return 0;
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printf("[UNCHANGED] %s\n", f);
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return 1;
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}
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static int found_override(const char *top, const char *bottom) {
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_cleanup_free_ char *dest = NULL;
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int k;
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pid_t pid;
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assert(top);
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assert(bottom);
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if (null_or_empty_path(top) > 0) {
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notify_override_masked(top, bottom);
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return 0;
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}
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k = readlink_malloc(top, &dest);
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if (k >= 0) {
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if (equivalent(dest, bottom) > 0)
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notify_override_equivalent(top, bottom);
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else
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notify_override_redirected(top, bottom);
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return 0;
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}
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notify_override_overridden(top, bottom);
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if (!arg_diff)
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return 0;
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putchar('\n');
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fflush(stdout);
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pid = fork();
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if (pid < 0) {
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log_error("Failed to fork off diff: %m");
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return -errno;
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} else if (pid == 0) {
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execlp("diff", "diff", "-us", "--", bottom, top, NULL);
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log_error("Failed to execute diff: %m");
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_exit(1);
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}
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wait_for_terminate(pid, NULL);
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putchar('\n');
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return 0;
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}
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static int enumerate_dir(Hashmap *top, Hashmap *bottom, const char *path) {
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_cleanup_closedir_ DIR *d;
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assert(top);
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assert(bottom);
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assert(path);
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d = opendir(path);
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if (!d) {
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if (errno == ENOENT)
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return 0;
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log_error("Failed to enumerate %s: %m", path);
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return -errno;
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}
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for (;;) {
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struct dirent *de;
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union dirent_storage buf;
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int k;
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char *p;
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k = readdir_r(d, &buf.de, &de);
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if (k != 0)
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return -k;
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if (!de)
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break;
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if (!dirent_is_file(de))
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continue;
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p = strjoin(path, "/", de->d_name, NULL);
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if (!p)
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return -ENOMEM;
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path_kill_slashes(p);
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k = hashmap_put(top, path_get_file_name(p), p);
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if (k >= 0) {
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p = strdup(p);
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if (!p)
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return -ENOMEM;
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} else if (k != -EEXIST) {
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free(p);
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return k;
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}
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free(hashmap_remove(bottom, path_get_file_name(p)));
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k = hashmap_put(bottom, path_get_file_name(p), p);
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if (k < 0) {
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free(p);
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return k;
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}
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}
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return 0;
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}
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static int process_suffix(const char *prefixes, const char *suffix) {
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const char *p;
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char *f;
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Hashmap *top, *bottom=NULL;
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int r = 0, k;
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Iterator i;
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int n_found = 0;
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assert(prefixes);
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assert(suffix);
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top = hashmap_new(string_hash_func, string_compare_func);
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if (!top) {
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r = -ENOMEM;
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goto finish;
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}
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bottom = hashmap_new(string_hash_func, string_compare_func);
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if (!bottom) {
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r = -ENOMEM;
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goto finish;
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}
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NULSTR_FOREACH(p, prefixes) {
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_cleanup_free_ char *t = NULL;
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t = strjoin(p, "/", suffix, NULL);
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if (!t) {
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r = -ENOMEM;
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goto finish;
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}
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k = enumerate_dir(top, bottom, t);
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if (k < 0)
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r = k;
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log_debug("Looking at %s", t);
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}
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HASHMAP_FOREACH(f, top, i) {
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char *o;
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o = hashmap_get(bottom, path_get_file_name(f));
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assert(o);
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if (path_equal(o, f)) {
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notify_override_unchanged(f);
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continue;
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}
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k = found_override(f, o);
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if (k < 0)
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r = k;
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n_found ++;
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}
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finish:
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if (top)
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hashmap_free_free(top);
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if (bottom)
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hashmap_free_free(bottom);
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return r < 0 ? r : n_found;
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}
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static int process_suffix_chop(const char *prefixes, const char *suffix) {
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const char *p;
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assert(prefixes);
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assert(suffix);
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if (!path_is_absolute(suffix))
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return process_suffix(prefixes, suffix);
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/* Strip prefix from the suffix */
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NULSTR_FOREACH(p, prefixes) {
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if (startswith(suffix, p)) {
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suffix += strlen(p);
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suffix += strspn(suffix, "/");
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return process_suffix(prefixes, suffix);
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}
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}
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log_error("Invalid suffix specification %s.", suffix);
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return -EINVAL;
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}
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static void help(void) {
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printf("%s [OPTIONS...] [SUFFIX...]\n\n"
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"Find overridden configuration files.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --no-pager Do not pipe output into a pager\n"
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" --diff[=1|0] Show a diff when overridden files differ\n"
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" -t --type=LIST... Only display a selected set of override types\n",
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program_invocation_short_name);
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}
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static int parse_flags(const char *flag_str, int flags) {
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char *w, *state;
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size_t l;
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FOREACH_WORD(w, l, flag_str, state) {
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if (strncmp("masked", w, l) == 0)
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flags |= SHOW_MASKED;
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else if (strncmp ("equivalent", w, l) == 0)
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flags |= SHOW_EQUIVALENT;
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else if (strncmp("redirected", w, l) == 0)
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flags |= SHOW_REDIRECTED;
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else if (strncmp("overridden", w, l) == 0)
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flags |= SHOW_OVERRIDDEN;
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else if (strncmp("unchanged", w, l) == 0)
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flags |= SHOW_UNCHANGED;
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else if (strncmp("default", w, l) == 0)
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flags |= SHOW_DEFAULTS;
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else
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return -EINVAL;
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}
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return flags;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_NO_PAGER = 0x100,
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ARG_DIFF,
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ARG_VERSION
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
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{ "diff", optional_argument, NULL, ARG_DIFF },
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{ "type", required_argument, NULL, 't' },
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{ NULL, 0, NULL, 0 }
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};
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int c;
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assert(argc >= 1);
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assert(argv);
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while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) {
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(DISTRIBUTION);
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puts(SYSTEMD_FEATURES);
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return 0;
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case ARG_NO_PAGER:
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arg_no_pager = true;
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break;
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case '?':
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return -EINVAL;
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case 't': {
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int f;
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f = parse_flags(optarg, arg_flags);
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if (f < 0) {
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log_error("Failed to parse flags field.");
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return -EINVAL;
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}
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arg_flags = f;
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break;
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}
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case ARG_DIFF:
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if (!optarg)
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arg_diff = 1;
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else {
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int b;
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b = parse_boolean(optarg);
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if (b < 0) {
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log_error("Failed to parse diff boolean.");
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return -EINVAL;
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} else if (b)
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arg_diff = 1;
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else
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arg_diff = 0;
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}
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break;
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default:
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log_error("Unknown option code %c", c);
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return -EINVAL;
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}
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}
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return 1;
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}
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int main(int argc, char *argv[]) {
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const char prefixes[] =
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"/etc\0"
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"/run\0"
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"/usr/local/lib\0"
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"/usr/local/share\0"
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"/usr/lib\0"
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"/usr/share\0"
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#ifdef HAVE_SPLIT_USR
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"/lib\0"
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#endif
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;
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const char suffixes[] =
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"sysctl.d\0"
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"tmpfiles.d\0"
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"modules-load.d\0"
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"binfmt.d\0"
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"systemd/system\0"
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"systemd/user\0"
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"systemd/system-preset\0"
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"systemd/user-preset\0"
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"udev/rules.d\0"
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"modprobe.d\0";
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int r = 0, k;
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int n_found = 0;
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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if (arg_flags == 0)
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arg_flags = SHOW_DEFAULTS;
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if (arg_diff < 0)
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arg_diff = !!(arg_flags & SHOW_OVERRIDDEN);
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else if (arg_diff)
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arg_flags |= SHOW_OVERRIDDEN;
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if (!arg_no_pager)
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pager_open();
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if (optind < argc) {
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int i;
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for (i = optind; i < argc; i++) {
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k = process_suffix_chop(prefixes, argv[i]);
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if (k < 0)
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r = k;
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else
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n_found += k;
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}
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} else {
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const char *n;
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NULSTR_FOREACH(n, suffixes) {
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k = process_suffix(prefixes, n);
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if (k < 0)
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r = k;
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else
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n_found += k;
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}
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}
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if (r >= 0)
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printf("\n%i overridden configuration files found.\n", n_found);
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finish:
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pager_close();
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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