Contents of /tags/mkinitrd-6_1_6/busybox/mailutils/popmaildir.c
Parent Directory | Revision Log
Revision 903 -
(show annotations)
(download)
Wed Aug 5 19:21:45 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 6403 byte(s)
Wed Aug 5 19:21:45 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 6403 byte(s)
tagged 'mkinitrd-6_1_6'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * popmaildir: a simple yet powerful POP3 client |
4 | * Delivers contents of remote mailboxes to local Maildir |
5 | * |
6 | * Inspired by original utility by Nikola Vladov |
7 | * |
8 | * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com> |
9 | * |
10 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
11 | */ |
12 | #include "libbb.h" |
13 | #include "mail.h" |
14 | |
15 | static void pop3_checkr(const char *fmt, const char *param, char **ret) |
16 | { |
17 | const char *msg = command(fmt, param); |
18 | char *answer = xmalloc_fgetline(stdin); |
19 | if (answer && '+' == *answer) { |
20 | if (timeout) |
21 | alarm(0); |
22 | if (ret) |
23 | *ret = answer+4; // skip "+OK " |
24 | else if (ENABLE_FEATURE_CLEAN_UP) |
25 | free(answer); |
26 | return; |
27 | } |
28 | bb_error_msg_and_die("%s failed: %s", msg, answer); |
29 | } |
30 | |
31 | static void pop3_check(const char *fmt, const char *param) |
32 | { |
33 | pop3_checkr(fmt, param, NULL); |
34 | } |
35 | |
36 | int popmaildir_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
37 | int popmaildir_main(int argc UNUSED_PARAM, char **argv) |
38 | { |
39 | char *buf; |
40 | unsigned nmsg; |
41 | char *hostname; |
42 | pid_t pid; |
43 | const char *retr; |
44 | #if ENABLE_FEATURE_POPMAILDIR_DELIVERY |
45 | const char *delivery; |
46 | #endif |
47 | unsigned opt_nlines = 0; |
48 | |
49 | enum { |
50 | OPT_b = 1 << 0, // -b binary mode. Ignored |
51 | OPT_d = 1 << 1, // -d,-dd,-ddd debug. Ignored |
52 | OPT_m = 1 << 2, // -m show used memory. Ignored |
53 | OPT_V = 1 << 3, // -V version. Ignored |
54 | OPT_c = 1 << 4, // -c use tcpclient. Ignored |
55 | OPT_a = 1 << 5, // -a use APOP protocol |
56 | OPT_s = 1 << 6, // -s skip authorization |
57 | OPT_T = 1 << 7, // -T get messages with TOP instead with RETR |
58 | OPT_k = 1 << 8, // -k keep retrieved messages on the server |
59 | OPT_t = 1 << 9, // -t90 set timeout to 90 sec |
60 | OPT_R = 1 << 10, // -R20000 remove old messages on the server >= 20000 bytes (requires -k). Ignored |
61 | OPT_Z = 1 << 11, // -Z11-23 remove messages from 11 to 23 (dangerous). Ignored |
62 | OPT_L = 1 << 12, // -L50000 not retrieve new messages >= 50000 bytes. Ignored |
63 | OPT_H = 1 << 13, // -H30 type first 30 lines of a message; (-L12000 -H30). Ignored |
64 | OPT_M = 1 << 14, // -M\"program arg1 arg2 ...\"; deliver by program. Treated like -F |
65 | OPT_F = 1 << 15, // -F\"program arg1 arg2 ...\"; filter by program. Treated like -M |
66 | }; |
67 | |
68 | // init global variables |
69 | INIT_G(); |
70 | |
71 | // parse options |
72 | opt_complementary = "-1:dd:t+:R+:L+:H+"; |
73 | opts = getopt32(argv, |
74 | "bdmVcasTkt:" "R:Z:L:H:" USE_FEATURE_POPMAILDIR_DELIVERY("M:F:"), |
75 | &timeout, NULL, NULL, NULL, &opt_nlines |
76 | USE_FEATURE_POPMAILDIR_DELIVERY(, &delivery, &delivery) // we treat -M and -F the same |
77 | ); |
78 | //argc -= optind; |
79 | argv += optind; |
80 | |
81 | // get auth info |
82 | if (!(opts & OPT_s)) |
83 | get_cred_or_die(STDIN_FILENO); |
84 | |
85 | // goto maildir |
86 | xchdir(*argv++); |
87 | |
88 | // launch connect helper, if any |
89 | if (*argv) |
90 | launch_helper((const char **)argv); |
91 | |
92 | // get server greeting |
93 | pop3_checkr(NULL, NULL, &buf); |
94 | |
95 | // authenticate (if no -s given) |
96 | if (!(opts & OPT_s)) { |
97 | // server supports APOP and we want it? -> use it |
98 | if ('<' == *buf && (opts & OPT_a)) { |
99 | md5_ctx_t md5; |
100 | // yes! compose <stamp><password> |
101 | char *s = strchr(buf, '>'); |
102 | if (s) |
103 | strcpy(s+1, G.pass); |
104 | s = buf; |
105 | // get md5 sum of <stamp><password> |
106 | md5_begin(&md5); |
107 | md5_hash(s, strlen(s), &md5); |
108 | md5_end(s, &md5); |
109 | // NOTE: md5 struct contains enough space |
110 | // so we reuse md5 space instead of xzalloc(16*2+1) |
111 | #define md5_hex ((uint8_t *)&md5) |
112 | // uint8_t *md5_hex = (uint8_t *)&md5; |
113 | *bin2hex((char *)md5_hex, s, 16) = '\0'; |
114 | // APOP |
115 | s = xasprintf("%s %s", G.user, md5_hex); |
116 | #undef md5_hex |
117 | pop3_check("APOP %s", s); |
118 | if (ENABLE_FEATURE_CLEAN_UP) { |
119 | free(s); |
120 | free(buf-4); // buf is "+OK " away from malloc'ed string |
121 | } |
122 | // server ignores APOP -> use simple text authentication |
123 | } else { |
124 | // USER |
125 | pop3_check("USER %s", G.user); |
126 | // PASS |
127 | pop3_check("PASS %s", G.pass); |
128 | } |
129 | } |
130 | |
131 | // get mailbox statistics |
132 | pop3_checkr("STAT", NULL, &buf); |
133 | |
134 | // prepare message filename suffix |
135 | hostname = safe_gethostname(); |
136 | pid = getpid(); |
137 | |
138 | // get messages counter |
139 | // NOTE: we don't use xatou(buf) since buf is "nmsg nbytes" |
140 | // we only need nmsg and atoi is just exactly what we need |
141 | // if atoi fails to convert buf into number it returns 0 |
142 | // in this case the following loop simply will not be executed |
143 | nmsg = atoi(buf); |
144 | if (ENABLE_FEATURE_CLEAN_UP) |
145 | free(buf-4); // buf is "+OK " away from malloc'ed string |
146 | |
147 | // loop through messages |
148 | retr = (opts & OPT_T) ? xasprintf("TOP %%u %u", opt_nlines) : "RETR %u"; |
149 | for (; nmsg; nmsg--) { |
150 | |
151 | char *filename; |
152 | char *target; |
153 | char *answer; |
154 | FILE *fp; |
155 | #if ENABLE_FEATURE_POPMAILDIR_DELIVERY |
156 | int rc; |
157 | #endif |
158 | // generate unique filename |
159 | filename = xasprintf("tmp/%llu.%u.%s", |
160 | monotonic_us(), (unsigned)pid, hostname); |
161 | |
162 | // retrieve message in ./tmp/ unless filter is specified |
163 | pop3_check(retr, (const char *)(ptrdiff_t)nmsg); |
164 | |
165 | #if ENABLE_FEATURE_POPMAILDIR_DELIVERY |
166 | // delivery helper ordered? -> setup pipe |
167 | if (opts & (OPT_F|OPT_M)) { |
168 | // helper will have $FILENAME set to filename |
169 | xsetenv("FILENAME", filename); |
170 | fp = popen(delivery, "w"); |
171 | unsetenv("FILENAME"); |
172 | if (!fp) { |
173 | bb_perror_msg("delivery helper"); |
174 | break; |
175 | } |
176 | } else |
177 | #endif |
178 | // create and open file filename |
179 | fp = xfopen_for_write(filename); |
180 | |
181 | // copy stdin to fp (either filename or delivery helper) |
182 | while ((answer = xmalloc_fgets_str(stdin, "\r\n")) != NULL) { |
183 | char *s = answer; |
184 | if ('.' == answer[0]) { |
185 | if ('.' == answer[1]) |
186 | s++; |
187 | else if ('\r' == answer[1] && '\n' == answer[2] && '\0' == answer[3]) |
188 | break; |
189 | } |
190 | //*strchrnul(s, '\r') = '\n'; |
191 | fputs(s, fp); |
192 | free(answer); |
193 | } |
194 | |
195 | #if ENABLE_FEATURE_POPMAILDIR_DELIVERY |
196 | // analyse delivery status |
197 | if (opts & (OPT_F|OPT_M)) { |
198 | rc = pclose(fp); |
199 | if (99 == rc) // 99 means bail out |
200 | break; |
201 | // if (rc) // !0 means skip to the next message |
202 | goto skip; |
203 | // // 0 means continue |
204 | } else { |
205 | // close filename |
206 | fclose(fp); |
207 | } |
208 | #endif |
209 | |
210 | // delete message from server |
211 | if (!(opts & OPT_k)) |
212 | pop3_check("DELE %u", (const char*)(ptrdiff_t)nmsg); |
213 | |
214 | // atomically move message to ./new/ |
215 | target = xstrdup(filename); |
216 | strncpy(target, "new", 3); |
217 | // ... or just stop receiving on failure |
218 | if (rename_or_warn(filename, target)) |
219 | break; |
220 | free(target); |
221 | |
222 | #if ENABLE_FEATURE_POPMAILDIR_DELIVERY |
223 | skip: |
224 | #endif |
225 | free(filename); |
226 | } |
227 | |
228 | // Bye |
229 | pop3_check("QUIT", NULL); |
230 | |
231 | if (ENABLE_FEATURE_CLEAN_UP) { |
232 | free(G.user); |
233 | free(G.pass); |
234 | } |
235 | |
236 | return EXIT_SUCCESS; |
237 | } |