libfuse

readdir_inode.c
1 /*
2 * Prints each directory entry, its inode and d_type as returned by 'readdir'.
3 * Skips '.' and '..' because readdir is not required to return them and
4 * some of our examples don't. However if they are returned, their d_type
5 * should be valid.
6 */
7
8 #include <stdio.h>
9 #include <string.h>
10 #include <sys/types.h>
11 #include <dirent.h>
12 #include <errno.h>
13
14 int main(int argc, char* argv[])
15 {
16 DIR* dirp;
17 struct dirent* dent;
18
19 if (argc != 2) {
20 fprintf(stderr, "Usage: readdir_inode dir\n");
21 return 1;
22 }
23
24 dirp = opendir(argv[1]);
25 if (dirp == NULL) {
26 perror("failed to open directory");
27 return 2;
28 }
29
30 errno = 0;
31 dent = readdir(dirp);
32 while (dent != NULL) {
33 if (strcmp(dent->d_name, ".") != 0 && strcmp(dent->d_name, "..") != 0) {
34 printf("%llu %d %s\n", (unsigned long long)dent->d_ino,
35 (int)dent->d_type, dent->d_name);
36 if ((long long)dent->d_ino < 0)
37 fprintf(stderr,"%s : bad d_ino %llu\n",
38 dent->d_name, (unsigned long long)dent->d_ino);
39 if ((dent->d_type < 1) || (dent->d_type > 15))
40 fprintf(stderr,"%s : bad d_type %d\n",
41 dent->d_name, (int)dent->d_type);
42 } else {
43 if (dent->d_type != DT_DIR)
44 fprintf(stderr,"%s : bad d_type %d\n",
45 dent->d_name, (int)dent->d_type);
46 }
47 dent = readdir(dirp);
48 }
49 if (errno != 0) {
50 perror("failed to read directory entry");
51 return 3;
52 }
53
54 closedir(dirp);
55
56 return 0;
57 }