2 * pop3 - a simple pop3 mail client
4 * Copyright (C) 2010-2016 Ali Gholami Rudi
6 * This program is released under the Modified BSD license.
22 #define BUFFSIZE (1 << 12)
23 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
24 #define MIN(a, b) ((a) < (b) ? (a) : (b))
25 #define PRINT(s, l) (write(1, (s), (l)))
27 static struct mailinfo
{
33 static struct uidl
*uidl
;
35 static char buf
[BUFFSIZE
];
38 static struct conn
*conn
;
41 static int pop3_read(void)
43 if (buf_pos
== buf_len
) {
44 buf_len
= conn_read(conn
, buf
, sizeof(buf
));
47 return buf_pos
< buf_len
? (unsigned char) buf
[buf_pos
++] : -1;
50 static int pop3_line(char *dst
, int len
)
66 static void send_cmd(char *cmd
)
68 conn_write(conn
, cmd
, strlen(cmd
));
69 DPRINT(cmd
, strlen(cmd
));
72 static int is_eoc(char *line
, int len
)
74 return len
>= 2 && len
<= 3 && line
[0] == '.' &&
75 (line
[1] == '\r' || line
[1] == '\n');
78 static char *cutword(char *dst
, char *s
)
80 while (*s
&& isspace(*s
))
82 while (*s
&& !isspace(*s
))
88 static void login(char *user
, char *pass
)
91 sprintf(line
, "USER %s\r\n", user
);
93 pop3_line(line
, sizeof(line
));
94 sprintf(line
, "PASS %s\r\n", pass
);
96 pop3_line(line
, sizeof(line
));
99 static void mail_stat(void)
103 send_cmd("STAT\r\n");
104 len
= pop3_line(line
, sizeof(line
));
106 send_cmd("LIST\r\n");
107 len
= pop3_line(line
, sizeof(line
));
108 while ((len
= pop3_line(line
, sizeof(line
))) != -1) {
109 struct mailinfo
*mail
;
111 if (is_eoc(line
, len
))
113 mail
= &mails
[nmails
++];
114 s
= cutword(mail
->name
, s
);
115 mail
->size
= atoi(s
);
119 static void mail_uidl(void)
125 send_cmd("UIDL\r\n");
126 len
= pop3_line(line
, sizeof(line
));
127 while ((len
= pop3_line(line
, sizeof(line
))) > 0 && !is_eoc(line
, len
)) {
129 s
= cutword(name
, s
);
130 s
= cutword(mails
[i
++].id
, s
);
134 static void req_mail(int i
)
137 sprintf(cmd
, "RETR %s\r\n", mails
[i
].name
);
141 static char *mail_dst(char *hdr
, int len
)
145 for (i
= 0; i
< ARRAY_SIZE(filters
); i
++)
146 if (!strncmp(filters
[i
].hdr
, hdr
, strlen(filters
[i
].hdr
)) &&
147 strstr(hdr
, filters
[i
].val
))
148 return filters
[i
].dst
;
152 static int xwrite(int fd
, char *buf
, int len
)
156 int ret
= write(fd
, buf
+ nw
, len
- nw
);
157 if (ret
== -1 && (errno
== EAGAIN
|| errno
== EINTR
))
166 static int mail_write(char *dst
, char *mail
, int len
)
168 int fd
= open(dst
, O_WRONLY
| O_APPEND
| O_CREAT
, 0600);
171 if (xwrite(fd
, mail
, len
) != len
)
177 static char *putstr(char *dst
, char *src
)
179 int len
= strchr(src
, '\0') - src
;
180 memcpy(dst
, src
, len
+ 1);
184 static char *put_from_(char *s
)
188 s
= putstr(s
, "From ");
189 s
= putstr(s
, getenv("USER") ? getenv("USER") : "root");
190 s
+= strftime(s
, MAXSIZE
, " %a %b %d %H:%M:%S %Y\n", localtime(&t
));
194 static int lone_from(char *s
)
198 return !strncmp("From ", s
, 5);
201 static int ret_mail(int i
)
205 int len
= pop3_line(line
, sizeof(line
));
209 PRINT(mails
[i
].name
, strlen(mails
[i
].name
));
212 len
= pop3_line(line
, sizeof(line
));
213 if (len
<= 0) /* end of stream or error */
215 if (is_eoc(line
, len
))
217 if (len
> 1 && line
[len
- 2] == '\r')
218 line
[len
-- - 2] = '\n';
222 dst
= mail_dst(line
, len
);
225 memcpy(s
, line
, len
);
231 ret
= mail_write(dst
, mailbuf
, s
- mailbuf
);
232 sprintf(line
, " -> %s\n", dst
);
233 PRINT(line
, strlen(line
));
237 static void del_mail(int i
)
240 sprintf(cmd
, "DELE %s\r\n", mails
[i
].name
);
244 static int size_ok(int i
)
246 return mails
[i
].size
+ 100 < MAXSIZE
;
249 static int uidl_new(int i
)
251 return !uidl
|| !uidl_find(uidl
, mails
[i
].id
);
254 static int ret_mails(int beg
, int end
, int del
)
258 for (i
= beg
; i
< end
; i
++)
259 if (size_ok(i
) && uidl_new(i
))
261 for (i
= beg
; i
< end
; i
++) {
262 if (size_ok(i
) && uidl_new(i
)) {
263 if (ret_mail(i
) == -1)
266 uidl_add(uidl
, mails
[i
].id
);
270 for (i
= beg
; i
< end
; i
++)
271 if ((!uidl
&& size_ok(i
)) || (uidl
&& !uidl_new(i
)))
273 for (i
= beg
; i
< end
; i
++)
274 if ((!uidl
&& size_ok(i
)) || (uidl
&& !uidl_new(i
)))
275 pop3_line(line
, sizeof(line
));
280 static int fetch(struct account
*account
)
286 conn
= conn_connect(account
->server
, account
->port
, account
->cert
);
292 uidl
= uidl_read(account
->uidl
);
293 sprintf(line
, "fetching %s@%s\n", account
->user
, account
->server
);
294 PRINT(line
, strlen(line
));
295 pop3_line(line
, sizeof(line
));
296 login(account
->user
, account
->pass
);
300 batch
= account
->nopipe
? 1 : nmails
;
301 for (i
= 0; i
< nmails
; i
+= batch
)
302 ret_mails(i
, MIN(nmails
, i
+ batch
), account
->del
);
303 send_cmd("QUIT\r\n");
304 pop3_line(line
, sizeof(line
));
312 static void sigint(int sig
)
319 int main(int argc
, char *argv
[])
322 signal(SIGINT
, sigint
);
323 mailbuf
= malloc(MAXSIZE
);
324 for (i
= 0; i
< ARRAY_SIZE(accounts
); i
++)
325 if (fetch(&accounts
[i
]) == -1)