[thirdparty/systemd.git] / src / delta / delta.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  Copyright 2012 Lennart Poettering
  Copyright 2013 Zbigniew Jędrzejewski-Szmek
***/

#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"
#if 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, CHASE_TRAIL_SLASH, &x);
        if (r < 0)
                return r;

        r = chase_symlinks(b, NULL, CHASE_TRAIL_SLASH, &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;
        pid_t pid;
        int r;

        assert(top);
        assert(bottom);

        if (null_or_empty_path(top) > 0)
                return notify_override_masked(top, bottom);

        r = readlink_malloc(top, &dest);
        if (r >= 0) {
                if (equivalent(dest, bottom) > 0)
                        return notify_override_equivalent(top, bottom);
                else
                        return notify_override_redirected(top, bottom);
        }

        r = notify_override_overridden(top, bottom);
        if (!arg_diff)
                return r;

        putchar('\n');

        fflush(stdout);

        r = safe_fork("(diff)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_LOG, &pid);
        if (r < 0)
                return r;
        if (r == 0) {
                execlp("diff", "diff", "-us", "--", bottom, top, NULL);
                log_open();
                log_error_errno(errno, "Failed to execute diff: %m");
                _exit(EXIT_FAILURE);
        }

        (void) wait_for_terminate_and_check("diff", pid, WAIT_LOG_ABNORMAL);
        putchar('\n');

        return r;
}

static int enumerate_dir_d(
                OrderedHashmap *top,
                OrderedHashmap *bottom,
                OrderedHashmap *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_sort(list);

        STRV_FOREACH(file, list) {
                OrderedHashmap *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 = ordered_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(ordered_hashmap_remove(bottom, d));
                k = ordered_hashmap_put(bottom, d, p);
                if (k < 0) {
                        free(p);
                        return k;
                }

                h = ordered_hashmap_get(drops, unit);
                if (!h) {
                        h = ordered_hashmap_new(&string_hash_ops);
                        if (!h)
                                return -ENOMEM;
                        ordered_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 = ordered_hashmap_put(h, basename(p), p);
                if (k < 0) {
                        free(p);
                        if (k != -EEXIST)
                                return k;
                }
        }
        return 0;
}

static int enumerate_dir(
                OrderedHashmap *top,
                OrderedHashmap *bottom,
                OrderedHashmap *drops,
                const char *path, bool dropins) {

        _cleanup_closedir_ DIR *d = NULL;
        struct dirent *de;
        _cleanup_strv_free_ char **files = NULL, **dirs = NULL;
        size_t n_files = 0, allocated_files = 0, n_dirs = 0, allocated_dirs = 0;
        char **t;
        int r;

        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) {
                dirent_ensure_type(d, de);

                if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d")) {
                        if (!GREEDY_REALLOC0(dirs, allocated_dirs, n_dirs + 2))
                                return -ENOMEM;

                        dirs[n_dirs] = strdup(de->d_name);
                        if (!dirs[n_dirs])
                                return -ENOMEM;
                        n_dirs ++;
                }

                if (!dirent_is_file(de))
                        continue;

                if (!GREEDY_REALLOC0(files, allocated_files, n_files + 2))
                        return -ENOMEM;

                files[n_files] = strdup(de->d_name);
                if (!files[n_files])
                        return -ENOMEM;
                n_files ++;
        }

        strv_sort(dirs);
        strv_sort(files);

        STRV_FOREACH(t, dirs) {
                r = enumerate_dir_d(top, bottom, drops, path, *t);
                if (r < 0)
                        return r;
        }

        STRV_FOREACH(t, files) {
                _cleanup_free_ char *p = NULL;

                p = strjoin(path, "/", *t);
                if (!p)
                        return -ENOMEM;

                log_debug("Adding at top: %s %s %s", basename(p), special_glyph(ARROW), p);
                r = ordered_hashmap_put(top, basename(p), p);
                if (r >= 0) {
                        p = strdup(p);
                        if (!p)
                                return -ENOMEM;
                } else if (r != -EEXIST)
                        return r;

                log_debug("Adding at bottom: %s %s %s", basename(p), special_glyph(ARROW), p);
                free(ordered_hashmap_remove(bottom, basename(p)));
                r = ordered_hashmap_put(bottom, basename(p), p);
                if (r < 0)
                        return r;
                p = NULL;
        }

        return 0;
}

static bool should_skip_path(const char *prefix, const char *suffix) {
#if HAVE_SPLIT_USR
        _cleanup_free_ char *target = NULL;
        const char *p;
        char *dirname;

        dirname = strjoina(prefix, "/", suffix);

        if (chase_symlinks(dirname, NULL, 0, &target) < 0)
                return false;

        NULSTR_FOREACH(p, prefixes) {
                if (path_startswith(dirname, p))
                        continue;

                if (path_equal(target, strjoina(p, "/", suffix))) {
                        log_debug("%s redirects to %s, skipping.", dirname, target);
                        return true;
                }
        }
#endif
        return false;
}

static int process_suffix(const char *suffix, const char *onlyprefix) {
        const char *p;
        char *f;
        OrderedHashmap *top, *bottom, *drops;
        OrderedHashmap *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 = ordered_hashmap_new(&string_hash_ops);
        bottom = ordered_hashmap_new(&string_hash_ops);
        drops = ordered_hashmap_new(&string_hash_ops);
        if (!top || !bottom || !drops) {
                r = -ENOMEM;
                goto finish;
        }

        NULSTR_FOREACH(p, prefixes) {
                _cleanup_free_ char *t = NULL;

                if (should_skip_path(p, suffix))
                        continue;

                t = strjoin(p, "/", suffix);
                if (!t) {
                        r = -ENOMEM;
                        goto finish;
                }

                k = enumerate_dir(top, bottom, drops, t, dropins);
                if (r == 0)
                        r = k;
        }

        ORDERED_HASHMAP_FOREACH_KEY(f, key, top, i) {
                char *o;

                o = ordered_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 = ordered_hashmap_get(drops, key);
                if (h)
                        ORDERED_HASHMAP_FOREACH(o, h, j)
                                if (!onlyprefix || startswith(o, onlyprefix))
                                        n_found += notify_override_extended(f, o);
        }

finish:
        ordered_hashmap_free_free(top);
        ordered_hashmap_free_free(bottom);

        ORDERED_HASHMAP_FOREACH_KEY(h, key, drops, i) {
                ordered_hashmap_free_free(ordered_hashmap_remove(drops, key));
                ordered_hashmap_remove(drops, key);
                free(key);
        }
        ordered_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;

                suffix = startswith(arg, p);
                if (suffix) {
                        suffix += strspn(suffix, "/");
                        if (*suffix)
                                return process_suffix(suffix, p);
                        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;

        (void) pager_open(arg_no_pager, false);

        if (optind < argc) {
                int i;

                for (i = optind; i < argc; i++) {
                        path_simplify(argv[i], false);

                        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;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
7e8d5761	2	/***
7e8d5761	3	Copyright 2012 Lennart Poettering
6096dfd6	4	Copyright 2013 Zbigniew Jędrzejewski-Szmek
7e8d5761 LP	5	***/
	6
	7	#include <errno.h>
7e8d5761	8	#include <getopt.h>
3f6fd1ba	9	#include <string.h>
ce30c8dc	10	#include <sys/prctl.h>
3f6fd1ba	11	#include <unistd.h>
7e8d5761	12
b5efdb8a	13	#include "alloc-util.h"
a0956174	14	#include "dirent-util.h"
3ffd4af2	15	#include "fd-util.h"
f4f15635	16	#include "fs-util.h"
7e8d5761	17	#include "hashmap.h"
8752c575	18	#include "locale-util.h"
7e8d5761 LP	19	#include "log.h"
7e8d5761 LP	20	#include "pager.h"
6bedfcbb	21	#include "parse-util.h"
3f6fd1ba	22	#include "path-util.h"
0b452006	23	#include "process-util.h"
ce30c8dc	24	#include "signal-util.h"
8fcde012	25	#include "stat-util.h"
07630cea	26	#include "string-util.h"
3f6fd1ba LP	27	#include "strv.h"
	28	#include "terminal-util.h"
	29	#include "util.h"
7e8d5761	30
f939e9a4 ZJS	31	static const char prefixes[] =
	32	"/etc\0"
	33	"/run\0"
	34	"/usr/local/lib\0"
	35	"/usr/local/share\0"
	36	"/usr/lib\0"
	37	"/usr/share\0"
349cc4a5	38	#if HAVE_SPLIT_USR
f939e9a4 ZJS	39	"/lib\0"
	40	#endif
	41	;
	42
	43	static const char suffixes[] =
	44	"sysctl.d\0"
	45	"tmpfiles.d\0"
	46	"modules-load.d\0"
	47	"binfmt.d\0"
	48	"systemd/system\0"
	49	"systemd/user\0"
	50	"systemd/system-preset\0"
	51	"systemd/user-preset\0"
	52	"udev/rules.d\0"
	53	"modprobe.d\0";
	54
	55	static const char have_dropins[] =
	56	"systemd/system\0"
	57	"systemd/user\0";
	58
7e8d5761	59	static bool arg_no_pager = false;
866062b1	60	static int arg_diff = -1;
7e8d5761	61
866062b1	62	static enum {
ef31828d	63	SHOW_MASKED = 1 << 0,
c8021373 LP	64	SHOW_EQUIVALENT = 1 << 1,
c8021373 LP	65	SHOW_REDIRECTED = 1 << 2,
386da858	66	SHOW_OVERRIDDEN = 1 << 3,
ef31828d LP	67	SHOW_UNCHANGED = 1 << 4,
ef31828d LP	68	SHOW_EXTENDED = 1 << 5,
4c4e6431 LP	69
4c4e6431 LP	70	SHOW_DEFAULTS =
0000ce05	71	(SHOW_MASKED \| SHOW_EQUIVALENT \| SHOW_REDIRECTED \| SHOW_OVERRIDDEN \| SHOW_EXTENDED)
866062b1	72	} arg_flags = 0;
4c4e6431	73
7e8d5761	74	static int equivalent(const char a, const char b) {
e26970a8	75	_cleanup_free_ char x = NULL, y = NULL;
e1873695	76	int r;
7e8d5761	77
62570f6f	78	r = chase_symlinks(a, NULL, CHASE_TRAIL_SLASH, &x);
e1873695 LP	79	if (r < 0)
e1873695 LP	80	return r;
7e8d5761	81
62570f6f	82	r = chase_symlinks(b, NULL, CHASE_TRAIL_SLASH, &y);
e1873695 LP	83	if (r < 0)
e1873695 LP	84	return r;
7e8d5761	85
e26970a8	86	return path_equal(x, y);
7e8d5761 LP	87	}
7e8d5761 LP	88
866062b1 LP	89	static int notify_override_masked(const char top, const char bottom) {
866062b1 LP	90	if (!(arg_flags & SHOW_MASKED))
807f4645 GN	91	return 0;
807f4645 GN	92
00a5cc3a	93	printf("%s%s%s %s %s %s\n",
1fc464f6	94	ansi_highlight_red(), "[MASKED]", ansi_normal(),
323b7dc9	95	top, special_glyph(ARROW), bottom);
807f4645 GN	96	return 1;
	97	}
	98
866062b1 LP	99	static int notify_override_equivalent(const char top, const char bottom) {
866062b1 LP	100	if (!(arg_flags & SHOW_EQUIVALENT))
807f4645 GN	101	return 0;
807f4645 GN	102
00a5cc3a	103	printf("%s%s%s %s %s %s\n",
1fc464f6	104	ansi_highlight_green(), "[EQUIVALENT]", ansi_normal(),
323b7dc9	105	top, special_glyph(ARROW), bottom);
807f4645 GN	106	return 1;
	107	}
	108
866062b1 LP	109	static int notify_override_redirected(const char top, const char bottom) {
866062b1 LP	110	if (!(arg_flags & SHOW_REDIRECTED))
807f4645 GN	111	return 0;
807f4645 GN	112
9b6e0ce5	113	printf("%s%s%s %s %s %s\n",
1fc464f6	114	ansi_highlight(), "[REDIRECTED]", ansi_normal(),
323b7dc9	115	top, special_glyph(ARROW), bottom);
807f4645 GN	116	return 1;
	117	}
	118
386da858 NM	119	static int notify_override_overridden(const char top, const char bottom) {
386da858 NM	120	if (!(arg_flags & SHOW_OVERRIDDEN))
807f4645 GN	121	return 0;
807f4645 GN	122
00a5cc3a	123	printf("%s%s%s %s %s %s\n",
1fc464f6	124	ansi_highlight(), "[OVERRIDDEN]", ansi_normal(),
323b7dc9	125	top, special_glyph(ARROW), bottom);
807f4645 GN	126	return 1;
	127	}
	128
0000ce05 LN	129	static int notify_override_extended(const char top, const char bottom) {
	130	if (!(arg_flags & SHOW_EXTENDED))
	131	return 0;
	132
00a5cc3a	133	printf("%s%s%s %s %s %s\n",
1fc464f6	134	ansi_highlight(), "[EXTENDED]", ansi_normal(),
323b7dc9	135	top, special_glyph(ARROW), bottom);
0000ce05 LN	136	return 1;
	137	}
	138
866062b1 LP	139	static int notify_override_unchanged(const char *f) {
866062b1 LP	140	if (!(arg_flags & SHOW_UNCHANGED))
807f4645 GN	141	return 0;
807f4645 GN	142
8e812a23	143	printf("[UNCHANGED] %s\n", f);
807f4645 GN	144	return 1;
	145	}
	146
866062b1	147	static int found_override(const char top, const char bottom) {
e26970a8	148	_cleanup_free_ char *dest = NULL;
7e8d5761	149	pid_t pid;
4c253ed1	150	int r;
7e8d5761 LP	151
	152	assert(top);
	153	assert(bottom);
	154
8fd57568 ZJS	155	if (null_or_empty_path(top) > 0)
8fd57568 ZJS	156	return notify_override_masked(top, bottom);
7e8d5761	157
4c253ed1 LP	158	r = readlink_malloc(top, &dest);
4c253ed1 LP	159	if (r >= 0) {
7e8d5761	160	if (equivalent(dest, bottom) > 0)
8fd57568	161	return notify_override_equivalent(top, bottom);
7e8d5761	162	else
8fd57568	163	return notify_override_redirected(top, bottom);
7e8d5761 LP	164	}
7e8d5761 LP	165
4c253ed1	166	r = notify_override_overridden(top, bottom);
866062b1	167	if (!arg_diff)
4c253ed1	168	return r;
7e8d5761 LP	169
	170	putchar('\n');
	171
	172	fflush(stdout);
	173
b6e1fff1	174	r = safe_fork("(diff)", FORK_RESET_SIGNALS\|FORK_DEATHSIG\|FORK_CLOSE_ALL_FDS\|FORK_LOG, &pid);
4c253ed1	175	if (r < 0)
b6e1fff1	176	return r;
4c253ed1	177	if (r == 0) {
7e8d5761	178	execlp("diff", "diff", "-us", "--", bottom, top, NULL);
0b1f3c76	179	log_open();
56f64d95	180	log_error_errno(errno, "Failed to execute diff: %m");
ce30c8dc	181	_exit(EXIT_FAILURE);
7e8d5761 LP	182	}
7e8d5761 LP	183
7d4904fe	184	(void) wait_for_terminate_and_check("diff", pid, WAIT_LOG_ABNORMAL);
7e8d5761 LP	185	putchar('\n');
7e8d5761 LP	186
4c253ed1	187	return r;
7e8d5761 LP	188	}
7e8d5761 LP	189
9f5ebb8a ZJS	190	static int enumerate_dir_d(
	191	OrderedHashmap *top,
	192	OrderedHashmap *bottom,
	193	OrderedHashmap *drops,
	194	const char toppath, const char drop) {
	195
f939e9a4	196	_cleanup_free_ char *unit = NULL;
0000ce05 LN	197	_cleanup_free_ char *path = NULL;
	198	_cleanup_strv_free_ char **list = NULL;
	199	char **file;
	200	char *c;
	201	int r;
	202
f939e9a4 ZJS	203	assert(!endswith(drop, "/"));
f939e9a4 ZJS	204
605405c6	205	path = strjoin(toppath, "/", drop);
0000ce05 LN	206	if (!path)
	207	return -ENOMEM;
	208
f939e9a4	209	log_debug("Looking at %s", path);
0000ce05	210
f939e9a4 ZJS	211	unit = strdup(drop);
f939e9a4 ZJS	212	if (!unit)
0000ce05 LN	213	return -ENOMEM;
0000ce05 LN	214
f939e9a4	215	c = strrchr(unit, '.');
0000ce05 LN	216	if (!c)
	217	return -EINVAL;
	218	*c = 0;
	219
	220	r = get_files_in_directory(path, &list);
23bbb0de MS	221	if (r < 0)
23bbb0de MS	222	return log_error_errno(r, "Failed to enumerate %s: %m", path);
0000ce05	223
9f5ebb8a ZJS	224	strv_sort(list);
9f5ebb8a ZJS	225
0000ce05	226	STRV_FOREACH(file, list) {
9f5ebb8a	227	OrderedHashmap *h;
0000ce05 LN	228	int k;
	229	char *p;
	230	char *d;
	231
	232	if (!endswith(*file, ".conf"))
	233	continue;
	234
605405c6	235	p = strjoin(path, "/", *file);
0000ce05 LN	236	if (!p)
0000ce05 LN	237	return -ENOMEM;
f939e9a4	238	d = p + strlen(toppath) + 1;
0000ce05	239
323b7dc9	240	log_debug("Adding at top: %s %s %s", d, special_glyph(ARROW), p);
9f5ebb8a	241	k = ordered_hashmap_put(top, d, p);
0000ce05 LN	242	if (k >= 0) {
	243	p = strdup(p);
	244	if (!p)
	245	return -ENOMEM;
f939e9a4	246	d = p + strlen(toppath) + 1;
0000ce05 LN	247	} else if (k != -EEXIST) {
	248	free(p);
	249	return k;
	250	}
	251
323b7dc9	252	log_debug("Adding at bottom: %s %s %s", d, special_glyph(ARROW), p);
9f5ebb8a ZJS	253	free(ordered_hashmap_remove(bottom, d));
9f5ebb8a ZJS	254	k = ordered_hashmap_put(bottom, d, p);
0000ce05 LN	255	if (k < 0) {
	256	free(p);
	257	return k;
	258	}
	259
9f5ebb8a	260	h = ordered_hashmap_get(drops, unit);
0000ce05	261	if (!h) {
9f5ebb8a	262	h = ordered_hashmap_new(&string_hash_ops);
0000ce05 LN	263	if (!h)
0000ce05 LN	264	return -ENOMEM;
9f5ebb8a	265	ordered_hashmap_put(drops, unit, h);
f939e9a4 ZJS	266	unit = strdup(unit);
f939e9a4 ZJS	267	if (!unit)
0000ce05 LN	268	return -ENOMEM;
	269	}
	270
	271	p = strdup(p);
	272	if (!p)
	273	return -ENOMEM;
	274
00a5cc3a	275	log_debug("Adding to drops: %s %s %s %s %s",
323b7dc9	276	unit, special_glyph(ARROW), basename(p), special_glyph(ARROW), p);
9f5ebb8a	277	k = ordered_hashmap_put(h, basename(p), p);
0000ce05 LN	278	if (k < 0) {
	279	free(p);
	280	if (k != -EEXIST)
	281	return k;
	282	}
	283	}
	284	return 0;
	285	}
	286
9f5ebb8a ZJS	287	static int enumerate_dir(
	288	OrderedHashmap *top,
	289	OrderedHashmap *bottom,
	290	OrderedHashmap *drops,
	291	const char *path, bool dropins) {
	292
	293	_cleanup_closedir_ DIR *d = NULL;
8fb3f009	294	struct dirent *de;
9f5ebb8a ZJS	295	_cleanup_strv_free_ char files = NULL, dirs = NULL;
	296	size_t n_files = 0, allocated_files = 0, n_dirs = 0, allocated_dirs = 0;
	297	char **t;
	298	int r;
7e8d5761 LP	299
	300	assert(top);
	301	assert(bottom);
0000ce05	302	assert(drops);
7e8d5761 LP	303	assert(path);
7e8d5761 LP	304
f939e9a4 ZJS	305	log_debug("Looking at %s", path);
f939e9a4 ZJS	306
7e8d5761 LP	307	d = opendir(path);
	308	if (!d) {
	309	if (errno == ENOENT)
	310	return 0;
	311
e1427b13	312	return log_error_errno(errno, "Failed to open %s: %m", path);
7e8d5761 LP	313	}
7e8d5761 LP	314
8fb3f009	315	FOREACH_DIRENT_ALL(de, d, return -errno) {
277f2f75 LN	316	dirent_ensure_type(d, de);
277f2f75 LN	317
9f5ebb8a ZJS	318	if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d")) {
	319	if (!GREEDY_REALLOC0(dirs, allocated_dirs, n_dirs + 2))
	320	return -ENOMEM;
	321
	322	dirs[n_dirs] = strdup(de->d_name);
	323	if (!dirs[n_dirs])
	324	return -ENOMEM;
	325	n_dirs ++;
	326	}
0000ce05	327
7e8d5761 LP	328	if (!dirent_is_file(de))
	329	continue;
	330
9f5ebb8a ZJS	331	if (!GREEDY_REALLOC0(files, allocated_files, n_files + 2))
	332	return -ENOMEM;
	333
	334	files[n_files] = strdup(de->d_name);
	335	if (!files[n_files])
	336	return -ENOMEM;
	337	n_files ++;
	338	}
	339
	340	strv_sort(dirs);
	341	strv_sort(files);
	342
	343	STRV_FOREACH(t, dirs) {
	344	r = enumerate_dir_d(top, bottom, drops, path, *t);
	345	if (r < 0)
	346	return r;
	347	}
	348
	349	STRV_FOREACH(t, files) {
	350	_cleanup_free_ char *p = NULL;
	351
	352	p = strjoin(path, "/", *t);
e26970a8 TA	353	if (!p)
e26970a8 TA	354	return -ENOMEM;
7e8d5761	355
323b7dc9	356	log_debug("Adding at top: %s %s %s", basename(p), special_glyph(ARROW), p);
9f5ebb8a ZJS	357	r = ordered_hashmap_put(top, basename(p), p);
9f5ebb8a ZJS	358	if (r >= 0) {
7e8d5761	359	p = strdup(p);
e26970a8 TA	360	if (!p)
e26970a8 TA	361	return -ENOMEM;
9f5ebb8a ZJS	362	} else if (r != -EEXIST)
9f5ebb8a ZJS	363	return r;
7e8d5761	364
323b7dc9	365	log_debug("Adding at bottom: %s %s %s", basename(p), special_glyph(ARROW), p);
9f5ebb8a ZJS	366	free(ordered_hashmap_remove(bottom, basename(p)));
	367	r = ordered_hashmap_put(bottom, basename(p), p);
	368	if (r < 0)
	369	return r;
	370	p = NULL;
7e8d5761	371	}
9f5ebb8a	372
8fb3f009	373	return 0;
7e8d5761 LP	374	}
7e8d5761 LP	375
4cc893e7	376	static bool should_skip_path(const char prefix, const char suffix) {
349cc4a5	377	#if HAVE_SPLIT_USR
b05422a8	378	_cleanup_free_ char *target = NULL;
4cc893e7 FB	379	const char *p;
4cc893e7 FB	380	char *dirname;
b05422a8	381
4cc893e7	382	dirname = strjoina(prefix, "/", suffix);
b05422a8	383
4cc893e7 FB	384	if (chase_symlinks(dirname, NULL, 0, &target) < 0)
	385	return false;
	386
	387	NULSTR_FOREACH(p, prefixes) {
	388	if (path_startswith(dirname, p))
	389	continue;
	390
	391	if (path_equal(target, strjoina(p, "/", suffix))) {
	392	log_debug("%s redirects to %s, skipping.", dirname, target);
	393	return true;
	394	}
	395	}
b05422a8	396	#endif
4cc893e7	397	return false;
b05422a8 FS	398	}
b05422a8 FS	399
6096dfd6	400	static int process_suffix(const char suffix, const char onlyprefix) {
7e8d5761 LP	401	const char *p;
7e8d5761 LP	402	char *f;
9f5ebb8a ZJS	403	OrderedHashmap top, bottom, *drops;
9f5ebb8a ZJS	404	OrderedHashmap *h;
0000ce05	405	char *key;
7e8d5761	406	int r = 0, k;
0000ce05	407	Iterator i, j;
7e8d5761	408	int n_found = 0;
f939e9a4	409	bool dropins;
7e8d5761	410
7e8d5761	411	assert(suffix);
f939e9a4 ZJS	412	assert(!startswith(suffix, "/"));
f939e9a4 ZJS	413	assert(!strstr(suffix, "//"));
7e8d5761	414
f939e9a4	415	dropins = nulstr_contains(have_dropins, suffix);
7e8d5761	416
9f5ebb8a ZJS	417	top = ordered_hashmap_new(&string_hash_ops);
	418	bottom = ordered_hashmap_new(&string_hash_ops);
	419	drops = ordered_hashmap_new(&string_hash_ops);
f939e9a4	420	if (!top \|\| !bottom \|\| !drops) {
0000ce05 LN	421	r = -ENOMEM;
	422	goto finish;
	423	}
	424
7e8d5761	425	NULSTR_FOREACH(p, prefixes) {
e26970a8	426	_cleanup_free_ char *t = NULL;
b05422a8	427
4cc893e7	428	if (should_skip_path(p, suffix))
b05422a8	429	continue;
7e8d5761	430
605405c6	431	t = strjoin(p, "/", suffix);
7e8d5761 LP	432	if (!t) {
	433	r = -ENOMEM;
	434	goto finish;
	435	}
	436
0000ce05	437	k = enumerate_dir(top, bottom, drops, t, dropins);
f939e9a4	438	if (r == 0)
7e8d5761	439	r = k;
7e8d5761 LP	440	}
7e8d5761 LP	441
9f5ebb8a	442	ORDERED_HASHMAP_FOREACH_KEY(f, key, top, i) {
7e8d5761 LP	443	char *o;
7e8d5761 LP	444
9f5ebb8a	445	o = ordered_hashmap_get(bottom, key);
7e8d5761 LP	446	assert(o);
7e8d5761 LP	447
6096dfd6 ZJS	448	if (!onlyprefix \|\| startswith(o, onlyprefix)) {
	449	if (path_equal(o, f)) {
	450	notify_override_unchanged(f);
	451	} else {
	452	k = found_override(f, o);
	453	if (k < 0)
	454	r = k;
	455	else
	456	n_found += k;
	457	}
807f4645	458	}
7e8d5761	459
9f5ebb8a	460	h = ordered_hashmap_get(drops, key);
0000ce05	461	if (h)
9f5ebb8a	462	ORDERED_HASHMAP_FOREACH(o, h, j)
6096dfd6 ZJS	463	if (!onlyprefix \|\| startswith(o, onlyprefix))
6096dfd6 ZJS	464	n_found += notify_override_extended(f, o);
7e8d5761 LP	465	}
	466
	467	finish:
9f5ebb8a ZJS	468	ordered_hashmap_free_free(top);
9f5ebb8a ZJS	469	ordered_hashmap_free_free(bottom);
82376245	470
9f5ebb8a ZJS	471	ORDERED_HASHMAP_FOREACH_KEY(h, key, drops, i) {
	472	ordered_hashmap_free_free(ordered_hashmap_remove(drops, key));
	473	ordered_hashmap_remove(drops, key);
82376245	474	free(key);
0000ce05	475	}
9f5ebb8a	476	ordered_hashmap_free(drops);
82376245	477
7e8d5761 LP	478	return r < 0 ? r : n_found;
	479	}
	480
6096dfd6 ZJS	481	static int process_suffixes(const char *onlyprefix) {
	482	const char *n;
	483	int n_found = 0, r;
	484
	485	NULSTR_FOREACH(n, suffixes) {
	486	r = process_suffix(n, onlyprefix);
	487	if (r < 0)
	488	return r;
82376245 LP	489
82376245 LP	490	n_found += r;
6096dfd6	491	}
82376245	492
6096dfd6 ZJS	493	return n_found;
	494	}
	495
	496	static int process_suffix_chop(const char *arg) {
7e8d5761 LP	497	const char *p;
7e8d5761 LP	498
6096dfd6	499	assert(arg);
7e8d5761	500
6096dfd6 ZJS	501	if (!path_is_absolute(arg))
6096dfd6 ZJS	502	return process_suffix(arg, NULL);
7e8d5761 LP	503
	504	/* Strip prefix from the suffix */
	505	NULSTR_FOREACH(p, prefixes) {
82376245 LP	506	const char *suffix;
	507
	508	suffix = startswith(arg, p);
6096dfd6	509	if (suffix) {
7e8d5761	510	suffix += strspn(suffix, "/");
6096dfd6	511	if (*suffix)
a9d041fa	512	return process_suffix(suffix, p);
6096dfd6 ZJS	513	else
6096dfd6 ZJS	514	return process_suffixes(arg);
7e8d5761 LP	515	}
	516	}
	517
6096dfd6	518	log_error("Invalid suffix specification %s.", arg);
7e8d5761 LP	519	return -EINVAL;
	520	}
	521
601185b4	522	static void help(void) {
7e8d5761 LP	523	printf("%s [OPTIONS...] [SUFFIX...]\n\n"
	524	"Find overridden configuration files.\n\n"
	525	" -h --help Show this help\n"
	526	" --version Show package version\n"
807f4645	527	" --no-pager Do not pipe output into a pager\n"
386da858	528	" --diff[=1\|0] Show a diff when overridden files differ\n"
601185b4 ZJS	529	" -t --type=LIST... Only display a selected set of override types\n"
601185b4 ZJS	530	, program_invocation_short_name);
7e8d5761 LP	531	}
7e8d5761 LP	532
866062b1	533	static int parse_flags(const char *flag_str, int flags) {
a2a5291b	534	const char word, state;
807f4645 GN	535	size_t l;
807f4645 GN	536
d0a2e1c3	537	FOREACH_WORD_SEPARATOR(word, l, flag_str, ",", state) {
a2a5291b	538	if (strneq("masked", word, l))
807f4645	539	flags \|= SHOW_MASKED;
a2a5291b	540	else if (strneq ("equivalent", word, l))
c8021373	541	flags \|= SHOW_EQUIVALENT;
a2a5291b	542	else if (strneq("redirected", word, l))
c8021373	543	flags \|= SHOW_REDIRECTED;
a2a5291b	544	else if (strneq("overridden", word, l))
386da858	545	flags \|= SHOW_OVERRIDDEN;
a2a5291b	546	else if (strneq("unchanged", word, l))
807f4645	547	flags \|= SHOW_UNCHANGED;
a2a5291b	548	else if (strneq("extended", word, l))
0000ce05	549	flags \|= SHOW_EXTENDED;
a2a5291b	550	else if (strneq("default", word, l))
807f4645	551	flags \|= SHOW_DEFAULTS;
866062b1 LP	552	else
866062b1 LP	553	return -EINVAL;
807f4645 GN	554	}
	555	return flags;
	556	}
	557
866062b1	558	static int parse_argv(int argc, char *argv[]) {
7e8d5761 LP	559
	560	enum {
	561	ARG_NO_PAGER = 0x100,
807f4645	562	ARG_DIFF,
7e8d5761 LP	563	ARG_VERSION
	564	};
	565
	566	static const struct option options[] = {
	567	{ "help", no_argument, NULL, 'h' },
	568	{ "version", no_argument, NULL, ARG_VERSION },
	569	{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
807f4645 GN	570	{ "diff", optional_argument, NULL, ARG_DIFF },
807f4645 GN	571	{ "type", required_argument, NULL, 't' },
eb9da376	572	{}
7e8d5761 LP	573	};
	574
	575	int c;
	576
	577	assert(argc >= 1);
	578	assert(argv);
	579
601185b4	580	while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0)
7e8d5761 LP	581
	582	switch (c) {
	583
	584	case 'h':
	585	help();
	586	return 0;
	587
	588	case ARG_VERSION:
3f6fd1ba	589	return version();
7e8d5761 LP	590
	591	case ARG_NO_PAGER:
	592	arg_no_pager = true;
	593	break;
	594
866062b1 LP	595	case 't': {
	596	int f;
	597	f = parse_flags(optarg, arg_flags);
	598	if (f < 0) {
	599	log_error("Failed to parse flags field.");
807f4645	600	return -EINVAL;
866062b1 LP	601	}
866062b1 LP	602	arg_flags = f;
807f4645	603	break;
866062b1	604	}
807f4645 GN	605
807f4645 GN	606	case ARG_DIFF:
866062b1 LP	607	if (!optarg)
	608	arg_diff = 1;
	609	else {
	610	int b;
	611
	612	b = parse_boolean(optarg);
	613	if (b < 0) {
	614	log_error("Failed to parse diff boolean.");
	615	return -EINVAL;
82376245 LP	616	}
	617
	618	arg_diff = b;
807f4645 GN	619	}
	620	break;
	621
eb9da376	622	case '?':
7e8d5761	623	return -EINVAL;
eb9da376 LP	624
	625	default:
	626	assert_not_reached("Unhandled option");
7e8d5761	627	}
7e8d5761 LP	628
	629	return 1;
	630	}
	631
	632	int main(int argc, char *argv[]) {
82376245	633	int r, k, n_found = 0;
7e8d5761 LP	634
	635	log_parse_environment();
	636	log_open();
	637
866062b1	638	r = parse_argv(argc, argv);
7e8d5761 LP	639	if (r <= 0)
	640	goto finish;
	641
866062b1 LP	642	if (arg_flags == 0)
	643	arg_flags = SHOW_DEFAULTS;
	644
	645	if (arg_diff < 0)
386da858	646	arg_diff = !!(arg_flags & SHOW_OVERRIDDEN);
866062b1	647	else if (arg_diff)
386da858	648	arg_flags \|= SHOW_OVERRIDDEN;
807f4645	649
ee5324aa	650	(void) pager_open(arg_no_pager, false);
7e8d5761 LP	651
	652	if (optind < argc) {
	653	int i;
	654
	655	for (i = optind; i < argc; i++) {
858d36c1	656	path_simplify(argv[i], false);
82376245	657
f939e9a4	658	k = process_suffix_chop(argv[i]);
7e8d5761 LP	659	if (k < 0)
	660	r = k;
	661	else
	662	n_found += k;
	663	}
	664
	665	} else {
6096dfd6 ZJS	666	k = process_suffixes(NULL);
	667	if (k < 0)
	668	r = k;
	669	else
	670	n_found += k;
7e8d5761 LP	671	}
	672
	673	if (r >= 0)
82376245	674	printf("%s%i overridden configuration files found.\n", n_found ? "\n" : "", n_found);
7e8d5761 LP	675
	676	finish:
	677	pager_close();
	678
	679	return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
	680	}