1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <string.h>
 4 #include <sys/stat.h>
 5 #include <fcntl.h>
 6 #include <errno.h>
 7 
 8 #define DB_ENVIRONMENT "SHA1_FILE_DIRECTOY"
 9 #define DEFAULT_DB_ENVIRONMENT ".dircache/objects"
10 
11 int main(int argc, char **argv)
12 {
13     char *sha1_dir = getenv(DB_ENVIRONMENT), *path;
14     int len, i, fd;
15 
16     if (mkdir(".dircache", 0700) < 0) {
17         perror("unable to create .dircache");
18         exit(1);
19     }
20 
21     sha1_dir = getenv(DB_ENVIRONMENT);
22     if (sha1_dir) {
23         struct stat st;
24         if (!stat(sha1_dir, &st) < 0 && S_ISDIR(st.st_mode))
25             return 0;
26         fprintf(stderr, "DB_ENVIRONMENT set to bad directory %s: ", sha1_dir);
27     }
28 
29     sha1_dir = DEFAULT_DB_ENVIRONMENT;
30     fprintf(stderr, "defaulting to private storage area\n");
31     len = strlen(sha1_dir);
32     if (mkdir(sha1_dir, 0700) < 0) {
33         if (errno != EEXIST) {
34             perror(sha1_dir);
35             exit(1);
36         }
37     }
38 
39     path = malloc(len + 40);
40     memcpy(path, sha1_dir, len);
41     for (i = 0; i < 256; i++) {
42         sprintf(path+len, "/%02x", i);
43         if (mkdir(path, 0700) < 0) {
44             if (errno != EEXIST) {
45                 perror(path);
46                 exit(1);
47             }
48         }
49     }
50     free(path);
51 
52     return 0;
53 }