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
|
#define _POSIX_SOURCE
#include "dietdirent.h"
#include <unistd.h>
#include <dirent.h>
#include <stdlib.h>
#include <errno.h>
#ifdef __DIET_ARCH_ONLY_DIRENT64
#define linux_dirent dirent64
#define getdents getdents64
#define gddirent dirent64
#else
#define gddirent dirent
struct linux_dirent {
uint32_t d_ino;
off_t d_off;
uint16_t d_reclen;
char d_name[1];
};
#endif
int readdir_r(DIR *d,struct dirent* entry, struct dirent** result) {
struct linux_dirent* ld;
*result=0;
ld=(struct linux_dirent*)(d->buf+d->cur);
if (!d->num || d->cur >= d->num || (d->cur += ld->d_reclen)>=d->num) {
int res=getdents(d->fd,(struct gddirent*)d->buf,sizeof (d->buf)-1);
if (res<=0)
return res<0;
d->num=res; d->cur=0;
}
ld=(struct linux_dirent*)(d->buf+d->cur);
/* struct dirent64 has d_name[256] instead of d_name[1] at the end */
if (ld->d_reclen < offsetof(struct linux_dirent,d_name)+1)
return 0; /* can't happen */
*result=entry;
entry->d_ino=ld->d_ino;
entry->d_off=ld->d_off;
entry->d_reclen=ld->d_reclen;
#ifdef __DIET_ARCH_ONLY_DIRENT64
entry->d_type=ld->d_type;
#else
entry->d_type=ld->d_name[ld->d_reclen-offsetof(struct linux_dirent,d_name)-1];
#endif
memcpy(entry->d_name,ld->d_name,ld->d_reclen-offsetof(struct linux_dirent,d_name));
return 0;
}
|
