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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* datefudge.c: Twist system date back N seconds
*
* Copyright (C) 2001-2003, Matthias Urlichs <smurf@noris.de>
*/
#define _GNU_SOURCE
#include <sys/file.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <assert.h>
#include <asm/unistd.h>
#include <features.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#define _NAME(foo) #foo
#define NAME(foo) _NAME(foo)
#if 0
#define N_open "open"
#else
#if __GLIBC_MINOR__ >= 1
#define N_open NAME(__libc_open)
#else
#define N_open NAME(__open)
#endif
#endif
int fudge = 0;
static void
init_fudge (void)
{
const char *fud;
if(fudge)return;
fud = getenv("DATEFUDGE");
if(fud == NULL) return;
fudge = atoi(fud);
}
/*
* This won't work...
*
text_set_element (__libc_subinit, init_logger);
*/
time_t time(time_t *x) {
static time_t (*libc_time)(time_t *) = NULL;
time_t res;
init_fudge();
if(!libc_time)
libc_time = (typeof(libc_time))dlsym (RTLD_NEXT, NAME(time));
res = (*libc_time)(x);
if(x) *x -= fudge;
res -= fudge;
return res;
}
int __gettimeofday(struct timeval *x, struct timezone *y) {
static time_t (*libc_gettimeofday)(struct timeval *, struct timezone *) = NULL;
int res;
init_fudge();
if(!libc_gettimeofday)
libc_gettimeofday = (typeof(libc_gettimeofday))dlsym (RTLD_NEXT, NAME(__gettimeofday));
res = (*libc_gettimeofday)(x,y);
if(res) return res;
x->tv_sec -= fudge;
return 0;
}
int gettimeofday(struct timeval *x, struct timezone *y)
{ return __gettimeofday(x,y); }
|
