summaryrefslogtreecommitdiff
path: root/src/shared/conf-files.c
blob: 7ba4bee43bbc2efd091c405c6716f2335548eb53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <dirent.h>

#include "macro.h"
#include "util.h"
#include "missing.h"
#include "log.h"
#include "strv.h"
#include "path-util.h"
#include "hashmap.h"
#include "conf-files.h"

static int files_add(Hashmap *h, const char *root, const char *path, const char *suffix) {
        _cleanup_closedir_ DIR *dir = NULL;
        _cleanup_free_ char *dirpath = NULL;

        if (asprintf(&dirpath, "%s%s", root ? root : "", path) < 0)
                return -ENOMEM;

        dir = opendir(dirpath);
        if (!dir) {
                if (errno == ENOENT)
                        return 0;
                return -errno;
        }

        for (;;) {
                struct dirent *de;
                union dirent_storage buf;
                char *p;
                int r;

                r = readdir_r(dir, &buf.de, &de);
                if (r != 0)
                        return -r;

                if (!de)
                        break;

                if (!dirent_is_file_with_suffix(de, suffix))
                        continue;

                p = strjoin(dirpath, "/", de->d_name, NULL);
                if (!p)
                        return -ENOMEM;

                r = hashmap_put(h, path_get_file_name(p), p);
                if (r == -EEXIST) {
                        log_debug("Skipping overridden file: %s.", p);
                        free(p);
                } else if (r < 0) {
                        free(p);
                        return r;
                } else if (r == 0) {
                        log_debug("Duplicate file %s", p);
                        free(p);
                }
        }

        return 0;
}

static int base_cmp(const void *a, const void *b) {
        const char *s1, *s2;

        s1 = *(char * const *)a;
        s2 = *(char * const *)b;
        return strcmp(path_get_file_name(s1), path_get_file_name(s2));
}

static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, char **dirs) {
        Hashmap *fh;
        char **files, **p;
        int r;

        assert(strv);
        assert(suffix);

        /* This alters the dirs string array */
        if (!path_strv_canonicalize_uniq(dirs))
                return -ENOMEM;

        fh = hashmap_new(string_hash_func, string_compare_func);
        if (!fh)
                return -ENOMEM;

        STRV_FOREACH(p, dirs) {
                r = files_add(fh, root, *p, suffix);
                if (r == -ENOMEM) {
                        hashmap_free_free(fh);
                        return r;
                } else if (r < 0)
                        log_debug("Failed to search for files in %s: %s",
                                  *p, strerror(-r));
        }

        files = hashmap_get_strv(fh);
        if (files == NULL) {
                hashmap_free_free(fh);
                return -ENOMEM;
        }

        qsort_safe(files, hashmap_size(fh), sizeof(char *), base_cmp);
        *strv = files;

        hashmap_free(fh);
        return 0;
}

int conf_files_list_strv(char ***strv, const char *suffix, const char *root, const char* const* dirs) {
        _cleanup_strv_free_ char **copy = NULL;

        assert(strv);
        assert(suffix);

        copy = strv_copy((char**) dirs);
        if (!copy)
                return -ENOMEM;

        return conf_files_list_strv_internal(strv, suffix, root, copy);
}

int conf_files_list(char ***strv, const char *suffix, const char *root, const char *dir, ...) {
        char **dirs;

        assert(strv);
        assert(suffix);

        dirs = strv_from_stdarg_alloca(dir);

        return conf_files_list_strv_internal(strv, suffix, root, dirs);
}

int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, const char *d) {
        _cleanup_strv_free_ char **dirs = NULL;

        assert(strv);
        assert(suffix);

        dirs = strv_split_nulstr(d);
        if (!dirs)
                return -ENOMEM;

        return conf_files_list_strv_internal(strv, suffix, root, dirs);
}