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
54
55
56
57
58
|
/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASLINKAT
#ifndef _ATFILE_SOURCE
#define _ATFILE_SOURCE
#endif
#include <skalibs/nonposix.h>
#include <unistd.h>
#include <skalibs/fcntl.h>
#include <skalibs/unix-transactional.h>
int access_at (int dirfd, char const *file, int amode, unsigned int flag)
{
return faccessat(dirfd, file, amode, flag ? AT_EACCESS : 0) ;
}
#else
#include <errno.h>
#include <unistd.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include "at-internal.h"
struct access_s
{
char const *file ;
int amode ;
} ;
static int do_access (void *p)
{
struct access_s *b = p ;
return access(b->file, b->amode) ;
}
static void cancel_access (int r, void *p)
{
(void)r ;
(void)p ;
}
int access_at (int dirfd, char const *file, int amode, unsigned int flag)
{
struct access_s args = { .file = file, .amode = amode } ;
if (flag && (getuid() != geteuid() || getgid() != getegid()))
return (errno = ENOSYS, 1) ;
return emulate_at(dirfd, &do_access, &cancel_access, &args) ;
}
#endif
|
