1 /* ----------------------------------------------------------------------------
2 libconfig - A library for processing structured configuration files
3 Copyright (C) 2005-2018 Mark A Lindner
4
5 This file is part of libconfig.
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License
9 as published by the Free Software Foundation; either version 2.1 of
10 the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public
18 License along with this library; if not, see
19 <http://www.gnu.org/licenses/>.
20 ----------------------------------------------------------------------------
21 */
22
23 #include <dirent.h>
24 #include <fnmatch.h>
25 #include <limits.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <sys/stat.h>
30
31 #include <libconfig.h>
32
33 /* This example reads the configuration file 'example.cfg' and displays
34 * some of its contents.
35 */
36
include_func(config_t * config,const char * include_dir,const char * path,const char ** error)37 static const char **include_func(config_t *config,
38 const char *include_dir,
39 const char *path,
40 const char **error)
41 {
42 char *p;
43 DIR *dp;
44 struct dirent *dir_entry;
45 struct stat stat_buf;
46 char include_path[PATH_MAX + 1];
47 size_t include_path_len = 0;
48 char file_path[PATH_MAX + 1];
49 char **result = NULL;
50 char **result_next = result;
51 int result_count = 0;
52 int result_capacity = 0;
53
54 *include_path = 0;
55
56 if(*path != '/')
57 {
58 if(include_dir)
59 {
60 strcat(include_path, include_dir);
61 include_path_len += strlen(include_dir);
62 }
63 }
64
65 p = strrchr(path, '/');
66 if(p > path)
67 {
68 int len = p - path;
69
70 if((include_path_len > 0)
71 && (*(include_path + include_path_len - 1) != '/'))
72 {
73 strcat(include_path, "/");
74 ++include_path_len;
75 }
76
77 strncat(include_path, path, len);
78 include_path_len += len;
79 }
80
81 if(include_path_len == 0)
82 {
83 strcpy(include_path, ".");
84 include_path_len = 1;
85 }
86
87 dp = opendir(include_path);
88 if(dp)
89 {
90 while((dir_entry = readdir(dp)) != NULL)
91 {
92 snprintf(file_path, PATH_MAX, "%s/%s", include_path, dir_entry->d_name);
93 if(lstat(file_path, &stat_buf) != 0) continue;
94 if(!S_ISREG(stat_buf.st_mode)) continue;
95 if(fnmatch(path, file_path, FNM_PATHNAME) != 0) continue;
96
97 if(result_count == result_capacity)
98 {
99 result_capacity += 16;
100 result = (char **)realloc(result, (result_capacity + 1) * sizeof(char *));
101 result_next = result + result_count;
102 }
103
104 *result_next = strdup(file_path);
105 ++result_next;
106 ++result_count;
107
108 printf("file: %s\n", file_path);
109 }
110 closedir(dp);
111 }
112
113 *result_next = NULL;
114
115 return((const char **)result);
116 }
117
main(int argc,char ** argv)118 int main(int argc, char **argv)
119 {
120 config_t cfg;
121
122 config_init(&cfg);
123 config_set_include_func(&cfg, include_func);
124
125 /* Read the file. If there is an error, report it and exit. */
126 if(! config_read_file(&cfg, "example4.cfg"))
127 {
128 fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
129 config_error_line(&cfg), config_error_text(&cfg));
130 config_destroy(&cfg);
131 return(EXIT_FAILURE);
132 }
133
134 config_write(&cfg, stdout);
135
136 return(EXIT_SUCCESS);
137 }
138