| 1 | #include <sys/types.h> |
| 2 | #include <sys/stat.h> |
| 3 | #include "direntry.h" |
| 4 | #include "sig.h" |
| 5 | #include "getln.h" |
| 6 | #include "stralloc.h" |
| 7 | #include "substdio.h" |
| 8 | #include "alloc.h" |
| 9 | #include "datetime.h" |
| 10 | #include "prot.h" |
| 11 | #include "open.h" |
| 12 | #include "prioq.h" |
| 13 | #include "scan.h" |
| 14 | #include "fmt.h" |
| 15 | #include "error.h" |
| 16 | #include "str.h" |
| 17 | #include "exit.h" |
| 18 | #include "now.h" |
| 19 | #include "readwrite.h" |
| 20 | |
| 21 | int timeout = 1200; |
| 22 | |
| 23 | char ssoutbuf[1024]; |
| 24 | substdio ssout = SUBSTDIO_FDBUF(write,1,ssoutbuf,sizeof(ssoutbuf)); |
| 25 | |
| 26 | int timeoutread(fd,buf,n) int fd; char *buf; int n; |
| 27 | { |
| 28 | int r; int saveerrno; |
| 29 | alarm(timeout); |
| 30 | r = read(fd,buf,n); saveerrno = errno; |
| 31 | alarm(0); |
| 32 | errno = saveerrno; return r; |
| 33 | } |
| 34 | |
| 35 | char ssinbuf[128]; |
| 36 | substdio ssin = SUBSTDIO_FDBUF(timeoutread,0,ssinbuf,sizeof(ssinbuf)); |
| 37 | |
| 38 | |
| 39 | void die() { _exit(0); } |
| 40 | void puts(s) char *s; |
| 41 | { |
| 42 | if (substdio_puts(&ssout,s) == -1) die(); |
| 43 | } |
| 44 | void flush() |
| 45 | { |
| 46 | if (substdio_flush(&ssout) == -1) die(); |
| 47 | } |
| 48 | void err(s) char *s; |
| 49 | { |
| 50 | puts("-ERR "); |
| 51 | puts(s); |
| 52 | puts("\r\n"); |
| 53 | if (substdio_flush(&ssout) == -1) die(); |
| 54 | } |
| 55 | void die_nomem() { err("out of memory"); die(); } |
| 56 | void die_prot() { err("protection problem"); die(); } |
| 57 | void die_nomaildir() { err("this user has no $HOME/Maildir"); die(); } |
| 58 | |
| 59 | void err_syntax() { err("syntax error"); } |
| 60 | void err_unimpl() { err("unimplemented"); } |
| 61 | void err_deleted() { err("already deleted"); } |
| 62 | void err_nozero() { err("messages are counted from 1"); } |
| 63 | void err_toobig() { err("not that many messages"); } |
| 64 | void err_nosuch() { err("unable to open that message"); } |
| 65 | void err_nounlink() { err("unable to unlink all deleted messages"); } |
| 66 | |
| 67 | void okay() { puts("+OK \r\n"); flush(); } |
| 68 | void pop3_last() { puts("+OK 0\r\n"); flush(); } |
| 69 | |
| 70 | |
| 71 | stralloc dataline = {0}; |
| 72 | |
| 73 | stralloc filenames = {0}; |
| 74 | prioq pq = {0}; |
| 75 | stralloc newname = {0}; |
| 76 | |
| 77 | struct message |
| 78 | { |
| 79 | int flagdeleted; |
| 80 | unsigned long size; |
| 81 | char *fn; |
| 82 | } |
| 83 | *m; |
| 84 | int numm; |
| 85 | |
| 86 | substdio ssmsg; char ssmsgbuf[1024]; |
| 87 | |
| 88 | |
| 89 | void blast(ssfrom,limit) |
| 90 | substdio *ssfrom; |
| 91 | unsigned long limit; |
| 92 | { |
| 93 | int match; |
| 94 | int inheaders = 1; |
| 95 | |
| 96 | for (;;) |
| 97 | { |
| 98 | if (getln(ssfrom,&dataline,&match,'\n') != 0) die(); |
| 99 | if (!match && !dataline.len) break; |
| 100 | if (match) --dataline.len; /* no way to pass this info over POP */ |
| 101 | if (limit) if (!inheaders) if (!--limit) break; |
| 102 | if (!dataline.len) |
| 103 | inheaders = 0; |
| 104 | else |
| 105 | if (dataline.s[0] == '.') |
| 106 | substdio_put(&ssout,".",1); |
| 107 | if (substdio_put(&ssout,dataline.s,dataline.len) == -1) die(); |
| 108 | if (substdio_put(&ssout,"\r\n",2) == -1) die(); |
| 109 | if (!match) break; |
| 110 | } |
| 111 | if (substdio_put(&ssout,"\r\n.\r\n",5) == -1) die(); |
| 112 | if (substdio_flush(&ssout) == -1) die(); |
| 113 | } |
| 114 | |
| 115 | void getlist() |
| 116 | { |
| 117 | unsigned long pos; |
| 118 | datetime_sec time; |
| 119 | DIR *dir; |
| 120 | direntry *d; |
| 121 | struct prioq_elt pe; |
| 122 | struct stat st; |
| 123 | int i; |
| 124 | |
| 125 | numm = 0; |
| 126 | |
| 127 | time = now(); |
| 128 | |
| 129 | if (dir = opendir("tmp")) |
| 130 | { |
| 131 | while (d = readdir(dir)) |
| 132 | { |
| 133 | if (str_equal(d->d_name,".")) continue; |
| 134 | if (str_equal(d->d_name,"..")) continue; |
| 135 | if (!stralloc_copys(&newname,"tmp/")) die_nomem(); |
| 136 | if (!stralloc_cats(&newname,d->d_name)) die_nomem(); |
| 137 | if (!stralloc_0(&newname)) die_nomem(); |
| 138 | if (stat(newname.s,&st) == 0) |
| 139 | if (time > st.st_atime + 129600) |
| 140 | unlink(newname.s); |
| 141 | } |
| 142 | closedir(dir); |
| 143 | } |
| 144 | |
| 145 | if (!stralloc_copys(&filenames,"")) die_nomem(); |
| 146 | |
| 147 | if (dir = opendir("new")) |
| 148 | { |
| 149 | while (d = readdir(dir)) |
| 150 | { |
| 151 | if (str_equal(d->d_name,".")) continue; |
| 152 | if (str_equal(d->d_name,"..")) continue; |
| 153 | pos = filenames.len; |
| 154 | if (!stralloc_cats(&filenames,"new/")) die_nomem(); |
| 155 | if (!stralloc_cats(&filenames,d->d_name)) die_nomem(); |
| 156 | if (!stralloc_0(&filenames)) die_nomem(); |
| 157 | if (stat(filenames.s + pos,&st) == 0) |
| 158 | { |
| 159 | pe.dt = st.st_mtime; |
| 160 | pe.id = pos; |
| 161 | if (!prioq_insert(&pq,&pe)) die_nomem(); |
| 162 | ++numm; |
| 163 | } |
| 164 | } |
| 165 | closedir(dir); |
| 166 | } |
| 167 | |
| 168 | if (dir = opendir("cur")) |
| 169 | { |
| 170 | while (d = readdir(dir)) |
| 171 | { |
| 172 | if (str_equal(d->d_name,".")) continue; |
| 173 | if (str_equal(d->d_name,"..")) continue; |
| 174 | pos = filenames.len; |
| 175 | if (!stralloc_cats(&filenames,"cur/")) die_nomem(); |
| 176 | if (!stralloc_cats(&filenames,d->d_name)) die_nomem(); |
| 177 | if (!stralloc_0(&filenames)) die_nomem(); |
| 178 | if (stat(filenames.s + pos,&st) == 0) |
| 179 | { |
| 180 | pe.dt = st.st_mtime; |
| 181 | pe.id = pos; |
| 182 | if (!prioq_insert(&pq,&pe)) die_nomem(); |
| 183 | ++numm; |
| 184 | } |
| 185 | } |
| 186 | closedir(dir); |
| 187 | } |
| 188 | |
| 189 | m = (struct message *) alloc(numm * sizeof(struct message)); |
| 190 | if (!m) die_nomem(); |
| 191 | |
| 192 | for (i = 0;i < numm;++i) |
| 193 | { |
| 194 | if (!prioq_min(&pq,&pe)) { numm = i; break; } |
| 195 | prioq_delmin(&pq); |
| 196 | m[i].fn = filenames.s + pe.id; |
| 197 | m[i].flagdeleted = 0; |
| 198 | if (stat(m[i].fn,&st) == -1) |
| 199 | m[i].size = 0; |
| 200 | else |
| 201 | m[i].size = st.st_size; |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | char foo[FMT_ULONG]; |
| 206 | |
| 207 | void printint(u) unsigned int u; |
| 208 | { |
| 209 | foo[fmt_uint(foo,u)] = 0; |
| 210 | puts(foo); |
| 211 | puts(" "); |
| 212 | } |
| 213 | |
| 214 | void printlong(u) unsigned long u; |
| 215 | { |
| 216 | foo[fmt_uint(foo,u)] = 0; |
| 217 | puts(foo); |
| 218 | puts("\r\n"); |
| 219 | } |
| 220 | |
| 221 | void printfn(fn) char *fn; |
| 222 | { |
| 223 | puts(fn + 4); |
| 224 | puts("\r\n"); |
| 225 | } |
| 226 | |
| 227 | void pop3_stat() |
| 228 | { |
| 229 | int i; |
| 230 | unsigned long total; |
| 231 | |
| 232 | total = 0; |
| 233 | for (i = 0;i < numm;++i) if (!m[i].flagdeleted) total += m[i].size; |
| 234 | puts("+OK "); |
| 235 | printint(numm); |
| 236 | printlong(total); |
| 237 | flush(); |
| 238 | } |
| 239 | |
| 240 | void pop3_rset() |
| 241 | { |
| 242 | int i; |
| 243 | for (i = 0;i < numm;++i) m[i].flagdeleted = 0; |
| 244 | okay(); |
| 245 | } |
| 246 | |
| 247 | void pop3_quit() |
| 248 | { |
| 249 | int i; |
| 250 | for (i = 0;i < numm;++i) |
| 251 | if (m[i].flagdeleted) |
| 252 | if (unlink(m[i].fn) == -1) err_nounlink(); |
| 253 | okay(); |
| 254 | die(); |
| 255 | } |
| 256 | |
| 257 | int msgno(arg) char *arg; |
| 258 | { |
| 259 | unsigned long u; |
| 260 | if (!arg) { err_syntax(); return -1; } |
| 261 | if (!scan_ulong(arg,&u)) { err_syntax(); return -1; } |
| 262 | if (!u) { err_nozero(); return -1; } |
| 263 | --u; |
| 264 | if (u >= numm) { err_toobig(); return -1; } |
| 265 | if (m[u].flagdeleted) { err_deleted(); return -1; } |
| 266 | return u; |
| 267 | } |
| 268 | |
| 269 | void pop3_dele(arg) char *arg; |
| 270 | { |
| 271 | int i; |
| 272 | |
| 273 | i = msgno(arg); |
| 274 | if (i == -1) return; |
| 275 | m[i].flagdeleted = 1; |
| 276 | okay(); |
| 277 | } |
| 278 | |
| 279 | void dolisting(arg,flaguidl) char *arg; int flaguidl; |
| 280 | { |
| 281 | unsigned int i; |
| 282 | |
| 283 | if (arg) |
| 284 | { |
| 285 | i = msgno(arg); |
| 286 | if (i == -1) return; |
| 287 | puts("+OK "); |
| 288 | printint(i + 1); |
| 289 | if (flaguidl) printfn(m[i].fn); else printlong(m[i].size); |
| 290 | } |
| 291 | else |
| 292 | { |
| 293 | okay(); |
| 294 | |
| 295 | for (i = 0;i < numm;++i) |
| 296 | if (!m[i].flagdeleted) |
| 297 | { |
| 298 | printint(i + 1); |
| 299 | if (flaguidl) printfn(m[i].fn); else printlong(m[i].size); |
| 300 | } |
| 301 | puts(".\r\n"); |
| 302 | } |
| 303 | flush(); |
| 304 | } |
| 305 | |
| 306 | void pop3_uidl(arg) char *arg; { dolisting(arg,1); } |
| 307 | void pop3_list(arg) char *arg; { dolisting(arg,0); } |
| 308 | |
| 309 | void pop3_top(arg) char *arg; |
| 310 | { |
| 311 | int i; |
| 312 | unsigned long limit; |
| 313 | int fd; |
| 314 | |
| 315 | i = msgno(arg); |
| 316 | if (i == -1) return; |
| 317 | |
| 318 | arg += scan_ulong(arg,&limit); |
| 319 | while (*arg == ' ') ++arg; |
| 320 | if (scan_ulong(arg,&limit)) ++limit; else limit = 0; |
| 321 | |
| 322 | fd = open_read(m[i].fn); |
| 323 | if (fd == -1) { err_nosuch(); return; } |
| 324 | okay(); |
| 325 | substdio_fdbuf(&ssmsg,read,fd,ssmsgbuf,sizeof(ssmsgbuf)); |
| 326 | blast(&ssmsg,limit); |
| 327 | close(fd); |
| 328 | } |
| 329 | |
| 330 | static struct { void (*fun)(); char *text; } pop3cmd[] = { |
| 331 | { pop3_quit, "quit" } |
| 332 | , { pop3_stat, "stat" } |
| 333 | , { pop3_list, "list" } |
| 334 | , { pop3_uidl, "uidl" } |
| 335 | , { pop3_dele, "dele" } |
| 336 | , { pop3_top, "retr" } |
| 337 | , { pop3_rset, "rset" } |
| 338 | , { pop3_last, "last" } |
| 339 | , { pop3_top, "top" } |
| 340 | , { okay, "noop" } |
| 341 | , { 0, 0 } |
| 342 | }; |
| 343 | |
| 344 | void doit(cmd) |
| 345 | char *cmd; |
| 346 | { |
| 347 | int i; |
| 348 | int j; |
| 349 | char ch; |
| 350 | |
| 351 | for (i = 0;pop3cmd[i].fun;++i) |
| 352 | { |
| 353 | for (j = 0;ch = pop3cmd[i].text[j];++j) |
| 354 | if ((cmd[j] != ch) && (cmd[j] != ch - 32)) |
| 355 | break; |
| 356 | if (!ch) |
| 357 | if (!cmd[j] || (cmd[j] == ' ')) |
| 358 | { |
| 359 | while (cmd[j] == ' ') ++j; |
| 360 | if (!cmd[j]) |
| 361 | pop3cmd[i].fun((char *) 0); |
| 362 | else |
| 363 | pop3cmd[i].fun(cmd + j); |
| 364 | return; |
| 365 | } |
| 366 | } |
| 367 | err_unimpl(); |
| 368 | } |
| 369 | |
| 370 | void main(argc,argv) |
| 371 | int argc; |
| 372 | char **argv; |
| 373 | { |
| 374 | static stralloc cmd = {0}; |
| 375 | int match; |
| 376 | |
| 377 | sig_alarmcatch(die); |
| 378 | sig_pipeignore(); |
| 379 | |
| 380 | if (!argv[1]) die_nomaildir(); |
| 381 | if (chdir(argv[1]) == -1) die_nomaildir(); |
| 382 | |
| 383 | getlist(); |
| 384 | |
| 385 | okay(); |
| 386 | |
| 387 | for (;;) |
| 388 | { |
| 389 | if (getln(&ssin,&cmd,&match,'\n') == -1) die(); |
| 390 | if (!match) die(); |
| 391 | if (cmd.len == 0) die(); |
| 392 | if (cmd.s[--cmd.len] != '\n') die(); |
| 393 | if ((cmd.len > 0) && (cmd.s[cmd.len - 1] == '\r')) --cmd.len; |
| 394 | cmd.s[cmd.len++] = 0; |
| 395 | doit(cmd.s); |
| 396 | } |
| 397 | } |