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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include "imapfilter.h"
#include "session.h"
#include "list.h"
#include "pathnames.h"
extern options opts;
extern environment env;
extern unsigned int flags;
extern list *sessions;
static FILE *debugfp = NULL; /* Pointer to debug file. */
static FILE *logfp = NULL; /* Pointer to log file. */
char *log_time(void);
/*
* Print message if in verbose mode.
*/
void
verbose(const char *fmt,...)
{
va_list args;
if (!opts.verbose)
return;
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
/*
* Write message to debug file.
*/
void
debug(const char *fmt,...)
{
va_list args;
if (opts.debug <= 0 || !debugfp)
return;
va_start(args, fmt);
vfprintf(debugfp, fmt, args);
fflush(debugfp);
va_end(args);
}
/*
* Write character to debug file.
*/
void
debugc(char c)
{
if (opts.debug <= 0 || !debugfp)
return;
fputc(c, debugfp);
}
/*
* Print error message and write it into log file.
*/
void
error(const char *fmt,...)
{
va_list args;
va_start(args, fmt);
fprintf(stderr, "imapfilter: ");
vfprintf(stderr, fmt, args);
if (logfp) {
fprintf(logfp, "%s: ", log_time());
vfprintf(logfp, fmt, args);
fflush(logfp);
}
va_end(args);
}
/*
* Print error message and exit program.
*/
void
fatal(unsigned int errnum, const char *fmt,...)
{
va_list args;
list *l;
session *s;
va_start(args, fmt);
fprintf(stderr, "imapfilter: ");
vfprintf(stderr, fmt, args);
va_end(args);
for (l = sessions; l; l = l->next) {
s = l->data;
close_connection(s);
}
close_log();
close_debug();
exit(errnum);
}
/*
* Open temporary debug file and associate a stream with the returned file
* descriptor.
*/
int
open_debug(void)
{
int n;
char b;
char *dt;
int fd;
if (!opts.debug)
return 0;
n = snprintf(&b, 1, "%s/%s", env.home, PATHNAME_DEBUG);
if (env.pathmax != -1 && n > env.pathmax)
fatal(ERROR_PATHNAME,
"pathname limit %ld exceeded: %d\n", env.pathmax, n);
dt = (char *)xmalloc((n + 1) * sizeof(char));
snprintf(dt, n + 1, "%s/%s", env.home, PATHNAME_DEBUG);
fd = mkstemp(dt);
if (fd != -1) {
debugfp = fdopen(fd, "w");
if (debugfp == NULL) {
error("opening debug file %s: %s\n", dt,
strerror(errno));
return -1;
}
}
return 0;
}
/*
* Close temporary debug file.
*/
int
close_debug(void)
{
if (debugfp == NULL)
return 0;
else
return fclose(debugfp);
}
/*
* Open the file for saving of logging information.
*/
int
open_log(void)
{
if (opts.log == NULL)
return 0;
debug("log file: '%s'\n", opts.log);
if (create_file(opts.log, S_IRUSR | S_IWUSR))
return 1;
logfp = fopen(opts.log, "a");
if (logfp == NULL) {
error("opening log file %s: %s\n", opts.log, strerror(errno));
return 1;
}
return 0;
}
/*
* Close the log file.
*/
int
close_log(void)
{
if (logfp == NULL)
return 0;
else
return fclose(logfp);
}
/*
* Return current local time and date.
*/
char *
log_time(void)
{
char *ct;
time_t t;
t = time(NULL);
ct = ctime(&t);
*(strchr(ct, '\n')) = '\0';
return ct;
}
|
