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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* libcsync -- a library to sync a directory with another
*
* Copyright (c) 2008-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config_csync.h"
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include "csync_time.h"
#include "vio/csync_vio.h"
#define CSYNC_LOG_CATEGORY_NAME "csync.time"
#include "csync_log.h"
#ifdef HAVE_CLOCK_GETTIME
# ifdef _POSIX_MONOTONIC_CLOCK
# define CSYNC_CLOCK CLOCK_MONOTONIC
# else
# define CSYNC_CLOCK CLOCK_REALTIME
# endif
#endif
int csync_gettime(struct timespec *tp)
{
#ifdef HAVE_CLOCK_GETTIME
return clock_gettime(CSYNC_CLOCK, tp);
#else
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0) {
return -1;
}
tp->tv_sec = tv.tv_sec;
tp->tv_nsec = tv.tv_usec * 1000;
#endif
return 0;
}
#undef CSYNC_CLOCK
/* check time difference between the replicas */
time_t csync_timediff(CSYNC *ctx) {
time_t timediff = -1;
char errbuf[256] = {0};
char *luri = NULL;
char *ruri = NULL;
csync_vio_handle_t *fp = NULL;
csync_vio_file_stat_t *st = NULL;
csync_vio_handle_t *dp = NULL;
/* try to open remote dir to get auth */
ctx->replica = ctx->remote.type;
dp = csync_vio_opendir(ctx, ctx->remote.uri);
if (dp == NULL) {
/*
* To prevent problems especially with pam_csync we shouldn't try to create the
* remote directory here. Just fail!
*/
C_STRERROR(errno, errbuf, sizeof(errbuf));
CSYNC_LOG(CSYNC_LOG_PRIORITY_FATAL,
"Access dienied to remote uri: %s - %s",
ctx->remote.uri,
errbuf);
ctx->status_code = CSYNC_STATUS_REMOTE_ACCESS_ERROR;
return -1;
}
csync_vio_closedir(ctx, dp);
if (asprintf(&luri, "%s/.csync_timediff.ctmp", ctx->local.uri) < 0) {
goto out;
}
if (asprintf(&ruri, "%s/.csync_timediff.ctmp", ctx->remote.uri) < 0) {
goto out;
}
/* create temporary file on local */
ctx->replica = ctx->local.type;
fp = csync_vio_creat(ctx, luri, 0644);
if (fp == NULL) {
C_STRERROR(errno, errbuf, sizeof(errbuf));
CSYNC_LOG(CSYNC_LOG_PRIORITY_FATAL,
"Unable to create temporary file: %s - %s",
luri,
errbuf);
ctx->status_code = CSYNC_STATUS_LOCAL_CREATE_ERROR;
goto out;
}
csync_vio_close(ctx, fp);
/* Get the modification time */
st = csync_vio_file_stat_new();
if (csync_vio_stat(ctx, luri, st) < 0) {
C_STRERROR(errno, errbuf, sizeof(errbuf));
CSYNC_LOG(CSYNC_LOG_PRIORITY_FATAL,
"Synchronisation is not possible! %s - %s",
luri,
errbuf);
ctx->status_code = CSYNC_STATUS_LOCAL_STAT_ERROR;
goto out;
}
timediff = st->mtime;
csync_vio_file_stat_destroy(st);
st = NULL;
/* create temporary file on remote replica */
ctx->replica = ctx->remote.type;
fp = csync_vio_creat(ctx, ruri, 0644);
if (fp == NULL) {
C_STRERROR(errno, errbuf, sizeof(errbuf));
CSYNC_LOG(CSYNC_LOG_PRIORITY_FATAL,
"Unable to create temporary file: %s - %s",
ruri,
errbuf);
ctx->status_code = CSYNC_STATUS_REMOTE_CREATE_ERROR;
goto out;
}
csync_vio_close(ctx, fp);
/* Get the modification time */
st = csync_vio_file_stat_new();
if (csync_vio_stat(ctx, ruri, st) < 0) {
C_STRERROR(errno, errbuf, sizeof(errbuf));
CSYNC_LOG(CSYNC_LOG_PRIORITY_FATAL,
"Synchronisation is not possible! %s - %s",
ruri,
errbuf);
ctx->status_code = CSYNC_STATUS_REMOTE_STAT_ERROR;
goto out;
}
/* calc time difference */
timediff = llabs(timediff - st->mtime);
CSYNC_LOG(CSYNC_LOG_PRIORITY_DEBUG, "Time difference: %ld seconds", timediff);
out:
csync_vio_file_stat_destroy(st);
ctx->replica = ctx->local.type;
csync_vio_unlink(ctx, luri);
SAFE_FREE(luri);
ctx->replica = ctx->remote.type;
csync_vio_unlink(ctx, ruri);
SAFE_FREE(ruri);
return timediff;
}
/* vim: set ts=8 sw=2 et cindent: */
|
