This source file includes following definitions.
- pager_open_if_enabled
- equivalent
- notify_override_masked
- notify_override_equivalent
- notify_override_redirected
- notify_override_overridden
- notify_override_extended
- notify_override_unchanged
- found_override
- enumerate_dir_d
- enumerate_dir
- process_suffix
- process_suffixes
- process_suffix_chop
- help
- parse_flags
- parse_argv
- main
#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"
#include "strv.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 void pager_open_if_enabled(void) {
if (arg_no_pager)
return;
pager_open(false);
}
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("%s%s%s %s %s %s\n",
ansi_highlight_red(), "[MASKED]", ansi_highlight_off(),
top, draw_special_char(DRAW_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_highlight_off(),
top, draw_special_char(DRAW_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_highlight_off(),
top, draw_special_char(DRAW_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_highlight_off(),
top, draw_special_char(DRAW_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_highlight_off(),
top, draw_special_char(DRAW_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) {
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_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, NULL);
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){
log_error("Failed to enumerate %s: %s", path, strerror(-r));
return r;
}
STRV_FOREACH(file, list) {
Hashmap *h;
int k;
char *p;
char *d;
if (!endswith(*file, ".conf"))
continue;
p = strjoin(path, "/", *file, NULL);
if (!p)
return -ENOMEM;
d = p + strlen(toppath) + 1;
log_debug("Adding at top: %s %s %s", d, draw_special_char(DRAW_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, draw_special_char(DRAW_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, draw_special_char(DRAW_ARROW), basename(p), draw_special_char(DRAW_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;
assert(top);
assert(bottom);
assert(drops);
assert(path);
log_debug("Looking at %s", path);
d = opendir(path);
if (!d) {
if (errno == ENOENT)
return 0;
log_error("Failed to open %s: %m", path);
return -errno;
}
for (;;) {
struct dirent *de;
int k;
char *p;
errno = 0;
de = readdir(d);
if (!de)
return -errno;
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, NULL);
if (!p)
return -ENOMEM;
log_debug("Adding at top: %s %s %s", basename(p), draw_special_char(DRAW_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), draw_special_char(DRAW_ARROW), p);
free(hashmap_remove(bottom, basename(p)));
k = hashmap_put(bottom, basename(p), p);
if (k < 0) {
free(p);
return k;
}
}
}
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;
t = strjoin(p, "/", suffix, NULL);
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:
if (top)
hashmap_free_free(top);
if (bottom)
hashmap_free_free(bottom);
if (drops) {
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;
else
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);
NULSTR_FOREACH(p, prefixes) {
const char *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:
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
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;
} else if (b)
arg_diff = 1;
else
arg_diff = 0;
}
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
return 1;
}
int main(int argc, char *argv[]) {
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;
pager_open_if_enabled();
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;
}