1 |
#include <stdio.h> |
2 |
#include <stdlib.h> |
3 |
#include <unistd.h> |
4 |
#include <errno.h> |
5 |
#include <string.h> |
6 |
#include <stdarg.h> |
7 |
#include <signal.h> |
8 |
#include <limits.h> |
9 |
#include <sys/types.h> |
10 |
#include <sys/stat.h> |
11 |
#include <fcntl.h> |
12 |
#include <time.h> |
13 |
|
14 |
#include "config.h" |
15 |
#include "imapfilter.h" |
16 |
|
17 |
|
18 |
extern char logfile[PATH_MAX]; |
19 |
extern unsigned int options; |
20 |
|
21 |
static FILE *logfp = NULL; /* Pointer to logfile. */ |
22 |
|
23 |
|
24 |
/* |
25 |
* Print message if not in OPTION_DETAILS_QUIET mode. |
26 |
*/ |
27 |
void info(const char *info,...) |
28 |
{ |
29 |
va_list args; |
30 |
|
31 |
if (options & OPTION_DETAILS_QUIET) |
32 |
return; |
33 |
|
34 |
va_start(args, info); |
35 |
vprintf(info, args); |
36 |
va_end(args); |
37 |
} |
38 |
|
39 |
|
40 |
/* |
41 |
* Print message if in OPTION_DETAILS_VERBOSE mode. |
42 |
*/ |
43 |
void verbose(const char *info,...) |
44 |
{ |
45 |
va_list args; |
46 |
|
47 |
if (options & OPTION_DETAILS_VERBOSE) { |
48 |
va_start(args, info); |
49 |
vprintf(info, args); |
50 |
va_end(args); |
51 |
} |
52 |
} |
53 |
|
54 |
|
55 |
/* |
56 |
* Print error message and write it into logfile. |
57 |
*/ |
58 |
void error(const char *errmsg,...) |
59 |
{ |
60 |
va_list args; |
61 |
|
62 |
va_start(args, errmsg); |
63 |
|
64 |
vfprintf(stderr, errmsg, args); |
65 |
|
66 |
if (logfp) { |
67 |
vfprintf(logfp, errmsg, args); |
68 |
} |
69 |
va_end(args); |
70 |
} |
71 |
|
72 |
|
73 |
/* |
74 |
* Print error message and exit program. |
75 |
*/ |
76 |
void fatal(unsigned int errnum, const char *fatal,...) |
77 |
{ |
78 |
va_list args; |
79 |
|
80 |
va_start(args, fatal); |
81 |
vfprintf(stderr, fatal, args); |
82 |
va_end(args); |
83 |
|
84 |
close_connection(); |
85 |
close_logfile(); |
86 |
|
87 |
exit(errnum); |
88 |
} |
89 |
|
90 |
|
91 |
/* |
92 |
* Catch signals that cause program's termination. |
93 |
*/ |
94 |
void catch_signals(void) |
95 |
{ |
96 |
signal(SIGINT, signal_handler); |
97 |
signal(SIGQUIT, signal_handler); |
98 |
signal(SIGTERM, signal_handler); |
99 |
} |
100 |
|
101 |
|
102 |
/* |
103 |
* Signal handler for signals that cause termination of program. |
104 |
*/ |
105 |
void signal_handler(int sig) |
106 |
{ |
107 |
fatal(ERROR_SIGNAL, "imapfilter: killed by signal %d\n", sig); |
108 |
} |
109 |
|
110 |
|
111 |
/* |
112 |
* Open the file for saving of logging information. |
113 |
*/ |
114 |
int open_logfile(void) |
115 |
{ |
116 |
if (!*logfile) |
117 |
return 0; /* Logging not enabled. */ |
118 |
|
119 |
#ifdef DEBUG |
120 |
printf("debug: logfile: '%s'\n", logfile); |
121 |
#endif |
122 |
|
123 |
if (create_logfile()) |
124 |
return ERROR_TRIVIAL; |
125 |
|
126 |
logfp = fopen(logfile, "a"); |
127 |
|
128 |
if (!logfp) { |
129 |
error("imapfilter: opening logfile %s: %s\n", |
130 |
logfile, strerror(errno)); |
131 |
return ERROR_TRIVIAL; |
132 |
} |
133 |
return 0; |
134 |
} |
135 |
|
136 |
|
137 |
/* |
138 |
* If logfile does not exist, create it with proper permissions. |
139 |
*/ |
140 |
int create_logfile(void) |
141 |
{ |
142 |
int fd; |
143 |
struct stat fs; |
144 |
|
145 |
if (stat(logfile, &fs) && errno == ENOENT) { |
146 |
fd = creat(logfile, S_IRUSR | S_IWUSR); |
147 |
close(fd); |
148 |
return 0; |
149 |
} else if (!S_ISREG(fs.st_mode)) { |
150 |
error("imapfilter: file %s already exists and not a regular file\n", |
151 |
logfile); |
152 |
return ERROR_TRIVIAL; |
153 |
} |
154 |
return 0; |
155 |
} |
156 |
|
157 |
|
158 |
/* |
159 |
* Close the logfile. |
160 |
*/ |
161 |
int close_logfile(void) |
162 |
{ |
163 |
if (!logfp) |
164 |
return 0; |
165 |
else |
166 |
return fclose(logfp); |
167 |
} |
168 |
|
169 |
|
170 |
/* |
171 |
* Prepares the log entry to be saved through continues calls, and writes it |
172 |
* to logfile. |
173 |
*/ |
174 |
void log_info(int flag, void *ptr) |
175 |
{ |
176 |
static struct { |
177 |
char *server; |
178 |
char *username; |
179 |
char *mbox; |
180 |
char *filter; |
181 |
unsigned int *action; |
182 |
char *destmbox; |
183 |
char *hdrs; |
184 |
} inf = { |
185 |
NULL, NULL, NULL, NULL, NULL, NULL, NULL |
186 |
}; |
187 |
|
188 |
if (!logfp) |
189 |
return; |
190 |
|
191 |
switch (flag) { |
192 |
case LOG_WRITE: |
193 |
fprintf(logfp, "%s %s %s %s %s %s%s\n", get_time(), |
194 |
inf.server, inf.username, inf.mbox, inf.filter, |
195 |
(*inf.action == FILTER_ACTION_DELETE ? "delete" : |
196 |
*inf.action == FILTER_ACTION_COPY ? "copy " : |
197 |
*inf.action == FILTER_ACTION_MOVE ? "move " : "list"), |
198 |
(!*inf.destmbox ? "" : inf.destmbox)); |
199 |
|
200 |
if (ptr) { |
201 |
inf.hdrs = (char *) ptr; |
202 |
fputc('\t', logfp); |
203 |
while (*inf.hdrs) { |
204 |
if (*inf.hdrs == '\n') { |
205 |
fputc('\n', logfp); |
206 |
if (*(inf.hdrs + 1)) |
207 |
fputc('\t', logfp); |
208 |
inf.hdrs++; |
209 |
} else |
210 |
fputc(*(inf.hdrs++), logfp); |
211 |
} |
212 |
} |
213 |
break; |
214 |
case LOG_SERVER: |
215 |
inf.server = (char *) ptr; |
216 |
break; |
217 |
case LOG_USERNAME: |
218 |
inf.username = (char *) ptr; |
219 |
break; |
220 |
case LOG_MAILBOX: |
221 |
inf.mbox = (char *) ptr; |
222 |
break; |
223 |
case LOG_FILTER: |
224 |
inf.filter = (char *) ptr; |
225 |
break; |
226 |
case LOG_ACTION: |
227 |
inf.action = (unsigned int *) ptr; |
228 |
break; |
229 |
case LOG_DESTINATION_MAILBOX: |
230 |
inf.destmbox = (char *) ptr; |
231 |
break; |
232 |
} |
233 |
} |
234 |
|
235 |
|
236 |
/* |
237 |
* Return current local time and date. |
238 |
*/ |
239 |
char *get_time(void) |
240 |
{ |
241 |
char *ct; |
242 |
time_t t; |
243 |
|
244 |
t = time(NULL); |
245 |
|
246 |
ct = ctime(&t); |
247 |
*(strchr(ct, '\n')) = 0; |
248 |
|
249 |
return ct; |
250 |
} |