664 lines
19 KiB
C
664 lines
19 KiB
C
/***
|
|
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;
|
|
}
|