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
|
#include <stdio.h>
#include <dirent.h>
#include <stdlib.h>
#include <unistd.h>
static int select_files(const struct dirent *dirbuf)
{
if (dirbuf->d_name[0] == '.')
return 0;
else
return 1;
}
int main(void)
{
struct dirent **array;
struct dirent *dirbuf;
int i, numdir;
chdir("/");
numdir = scandir(".", &array, select_files, NULL);
printf("\nGot %d entries from scandir().\n", numdir);
for (i = 0; i < numdir; ++i) {
dirbuf = array[i];
printf("[%d] %s\n", i, dirbuf->d_name);
free(array[i]);
}
free(array);
numdir = scandir(".", &array, select_files, alphasort);
printf("\nGot %d entries from scandir() using alphasort().\n", numdir);
for (i = 0; i < numdir; ++i) {
dirbuf = array[i];
printf("[%d] %s\n", i, dirbuf->d_name);
}
printf("\nCalling qsort()\n");
/* Even though some manpages say that alphasort should be
* int alphasort(const void *a, const void *b),
* in reality glibc and uclibc have const struct dirent**
* instead of const void*.
* Therefore we get a warning here unless we use a cast,
* which makes people think that alphasort prototype
* needs to be fixed in uclibc headers.
*/
qsort(array, numdir, sizeof(struct dirent *), (void*) alphasort);
for (i = 0; i < numdir; ++i) {
dirbuf = array[i];
printf("[%d] %s\n", i, dirbuf->d_name);
free(array[i]);
}
free(array);
return (0);
}
|
