imap-send.c

   1 /*
   2  * git-imap-send - drops patches into an imap Drafts folder
   3  *                 derived from isync/mbsync - mailbox synchronizer
   4  *
   5  * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
   6  * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
   7  * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
   8  * Copyright (C) 2006 Mike McCormack
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include "cache.h"
  26 #include "exec_cmd.h"
  27 #ifdef NO_OPENSSL
  28 typedef void *SSL;
  29 #endif
  30
  31 struct store_conf {
  32         char *name;
  33         const char *path; /* should this be here? its interpretation is driver-specific */
  34         char *map_inbox;
  35         char *trash;
  36         unsigned max_size; /* off_t is overkill */
  37         unsigned trash_remote_new:1, trash_only_new:1;
  38 };
  39
  40 struct string_list {
  41         struct string_list *next;
  42         char string[1];
  43 };
  44
  45 struct channel_conf {
  46         struct channel_conf *next;
  47         char *name;
  48         struct store_conf *master, *slave;
  49         char *master_name, *slave_name;
  50         char *sync_state;
  51         struct string_list *patterns;
  52         int mops, sops;
  53         unsigned max_messages; /* for slave only */
  54 };
  55
  56 struct group_conf {
  57         struct group_conf *next;
  58         char *name;
  59         struct string_list *channels;
  60 };
  61
  62 /* For message->status */
  63 #define M_RECENT       (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
  64 #define M_DEAD         (1<<1) /* expunged */
  65 #define M_FLAGS        (1<<2) /* flags fetched */
  66
  67 struct message {
  68         struct message *next;
  69         /* struct string_list *keywords; */
  70         size_t size; /* zero implies "not fetched" */
  71         int uid;
  72         unsigned char flags, status;
  73 };
  74
  75 struct store {
  76         struct store_conf *conf; /* foreign */
  77
  78         /* currently open mailbox */
  79         const char *name; /* foreign! maybe preset? */
  80         char *path; /* own */
  81         struct message *msgs; /* own */
  82         int uidvalidity;
  83         unsigned char opts; /* maybe preset? */
  84         /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
  85         int count; /* # of messages */
  86         int recent; /* # of recent messages - don't trust this beyond the initial read */
  87 };
  88
  89 struct msg_data {
  90         char *data;
  91         int len;
  92         unsigned char flags;
  93         unsigned int crlf:1;
  94 };
  95
  96 #define DRV_OK          0
  97 #define DRV_MSG_BAD     -1
  98 #define DRV_BOX_BAD     -2
  99 #define DRV_STORE_BAD   -3
 100
 101 static int Verbose, Quiet;
 102
 103 static void imap_info(const char *, ...);
 104 static void imap_warn(const char *, ...);
 105
 106 static char *next_arg(char **);
 107
 108 static void free_generic_messages(struct message *);
 109
 110 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
 111
 112 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
 113 {
 114         int len;
 115         char tmp[8192];
 116
 117         len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
 118         if (len < 0)
 119                 die("Fatal: Out of memory");
 120         if (len >= sizeof(tmp))
 121                 die("imap command overflow!");
 122         *strp = xmemdupz(tmp, len);
 123         return len;
 124 }
 125
 126 static void arc4_init(void);
 127 static unsigned char arc4_getbyte(void);
 128
 129 struct imap_server_conf {
 130         char *name;
 131         char *tunnel;
 132         char *host;
 133         int port;
 134         char *user;
 135         char *pass;
 136         int use_ssl;
 137         int ssl_verify;
 138         int use_html;
 139 };
 140
 141 struct imap_store_conf {
 142         struct store_conf gen;
 143         struct imap_server_conf *server;
 144         unsigned use_namespace:1;
 145 };
 146
 147 #define NIL     (void *)0x1
 148 #define LIST    (void *)0x2
 149
 150 struct imap_list {
 151         struct imap_list *next, *child;
 152         char *val;
 153         int len;
 154 };
 155
 156 struct imap_socket {
 157         int fd;
 158         SSL *ssl;
 159 };
 160
 161 struct imap_buffer {
 162         struct imap_socket sock;
 163         int bytes;
 164         int offset;
 165         char buf[1024];
 166 };
 167
 168 struct imap_cmd;
 169
 170 struct imap {
 171         int uidnext; /* from SELECT responses */
 172         struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
 173         unsigned caps, rcaps; /* CAPABILITY results */
 174         /* command queue */
 175         int nexttag, num_in_progress, literal_pending;
 176         struct imap_cmd *in_progress, **in_progress_append;
 177         struct imap_buffer buf; /* this is BIG, so put it last */
 178 };
 179
 180 struct imap_store {
 181         struct store gen;
 182         int uidvalidity;
 183         struct imap *imap;
 184         const char *prefix;
 185         unsigned /*currentnc:1,*/ trashnc:1;
 186 };
 187
 188 struct imap_cmd_cb {
 189         int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 190         void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 191         void *ctx;
 192         char *data;
 193         int dlen;
 194         int uid;
 195         unsigned create:1, trycreate:1;
 196 };
 197
 198 struct imap_cmd {
 199         struct imap_cmd *next;
 200         struct imap_cmd_cb cb;
 201         char *cmd;
 202         int tag;
 203 };
 204
 205 #define CAP(cap) (imap->caps & (1 << (cap)))
 206
 207 enum CAPABILITY {
 208         NOLOGIN = 0,
 209         UIDPLUS,
 210         LITERALPLUS,
 211         NAMESPACE,
 212         STARTTLS,
 213 };
 214
 215 static const char *cap_list[] = {
 216         "LOGINDISABLED",
 217         "UIDPLUS",
 218         "LITERAL+",
 219         "NAMESPACE",
 220         "STARTTLS",
 221 };
 222
 223 #define RESP_OK    0
 224 #define RESP_NO    1
 225 #define RESP_BAD   2
 226
 227 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 228
 229
 230 static const char *Flags[] = {
 231         "Draft",
 232         "Flagged",
 233         "Answered",
 234         "Seen",
 235         "Deleted",
 236 };
 237
 238 #ifndef NO_OPENSSL
 239 static void ssl_socket_perror(const char *func)
 240 {
 241         fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), 0));
 242 }
 243 #endif
 244
 245 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 246 {
 247 #ifndef NO_OPENSSL
 248         if (sock->ssl) {
 249                 int sslerr = SSL_get_error(sock->ssl, ret);
 250                 switch (sslerr) {
 251                 case SSL_ERROR_NONE:
 252                         break;
 253                 case SSL_ERROR_SYSCALL:
 254                         perror("SSL_connect");
 255                         break;
 256                 default:
 257                         ssl_socket_perror("SSL_connect");
 258                         break;
 259                 }
 260         } else
 261 #endif
 262         {
 263                 if (ret < 0)
 264                         perror(func);
 265                 else
 266                         fprintf(stderr, "%s: unexpected EOF\n", func);
 267         }
 268 }
 269
 270 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 271 {
 272 #ifdef NO_OPENSSL
 273         fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 274         return -1;
 275 #else
 276         SSL_METHOD *meth;
 277         SSL_CTX *ctx;
 278         int ret;
 279
 280         SSL_library_init();
 281         SSL_load_error_strings();
 282
 283         if (use_tls_only)
 284                 meth = TLSv1_method();
 285         else
 286                 meth = SSLv23_method();
 287
 288         if (!meth) {
 289                 ssl_socket_perror("SSLv23_method");
 290                 return -1;
 291         }
 292
 293         ctx = SSL_CTX_new(meth);
 294
 295         if (verify)
 296                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 297
 298         if (!SSL_CTX_set_default_verify_paths(ctx)) {
 299                 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 300                 return -1;
 301         }
 302         sock->ssl = SSL_new(ctx);
 303         if (!sock->ssl) {
 304                 ssl_socket_perror("SSL_new");
 305                 return -1;
 306         }
 307         if (!SSL_set_fd(sock->ssl, sock->fd)) {
 308                 ssl_socket_perror("SSL_set_fd");
 309                 return -1;
 310         }
 311
 312         ret = SSL_connect(sock->ssl);
 313         if (ret <= 0) {
 314                 socket_perror("SSL_connect", sock, ret);
 315                 return -1;
 316         }
 317
 318         return 0;
 319 #endif
 320 }
 321
 322 static int socket_read(struct imap_socket *sock, char *buf, int len)
 323 {
 324         ssize_t n;
 325 #ifndef NO_OPENSSL
 326         if (sock->ssl)
 327                 n = SSL_read(sock->ssl, buf, len);
 328         else
 329 #endif
 330                 n = xread(sock->fd, buf, len);
 331         if (n <= 0) {
 332                 socket_perror("read", sock, n);
 333                 close(sock->fd);
 334                 sock->fd = -1;
 335         }
 336         return n;
 337 }
 338
 339 static int socket_write(struct imap_socket *sock, const char *buf, int len)
 340 {
 341         int n;
 342 #ifndef NO_OPENSSL
 343         if (sock->ssl)
 344                 n = SSL_write(sock->ssl, buf, len);
 345         else
 346 #endif
 347                 n = write_in_full(sock->fd, buf, len);
 348         if (n != len) {
 349                 socket_perror("write", sock, n);
 350                 close(sock->fd);
 351                 sock->fd = -1;
 352         }
 353         return n;
 354 }
 355
 356 static void socket_shutdown(struct imap_socket *sock)
 357 {
 358 #ifndef NO_OPENSSL
 359         if (sock->ssl) {
 360                 SSL_shutdown(sock->ssl);
 361                 SSL_free(sock->ssl);
 362         }
 363 #endif
 364         close(sock->fd);
 365 }
 366
 367 /* simple line buffering */
 368 static int buffer_gets(struct imap_buffer *b, char **s)
 369 {
 370         int n;
 371         int start = b->offset;
 372
 373         *s = b->buf + start;
 374
 375         for (;;) {
 376                 /* make sure we have enough data to read the \r\n sequence */
 377                 if (b->offset + 1 >= b->bytes) {
 378                         if (start) {
 379                                 /* shift down used bytes */
 380                                 *s = b->buf;
 381
 382                                 assert(start <= b->bytes);
 383                                 n = b->bytes - start;
 384
 385                                 if (n)
 386                                         memmove(b->buf, b->buf + start, n);
 387                                 b->offset -= start;
 388                                 b->bytes = n;
 389                                 start = 0;
 390                         }
 391
 392                         n = socket_read(&b->sock, b->buf + b->bytes,
 393                                          sizeof(b->buf) - b->bytes);
 394
 395                         if (n <= 0)
 396                                 return -1;
 397
 398                         b->bytes += n;
 399                 }
 400
 401                 if (b->buf[b->offset] == '\r') {
 402                         assert(b->offset + 1 < b->bytes);
 403                         if (b->buf[b->offset + 1] == '\n') {
 404                                 b->buf[b->offset] = 0;  /* terminate the string */
 405                                 b->offset += 2; /* next line */
 406                                 if (Verbose)
 407                                         puts(*s);
 408                                 return 0;
 409                         }
 410                 }
 411
 412                 b->offset++;
 413         }
 414         /* not reached */
 415 }
 416
 417 static void imap_info(const char *msg, ...)
 418 {
 419         va_list va;
 420
 421         if (!Quiet) {
 422                 va_start(va, msg);
 423                 vprintf(msg, va);
 424                 va_end(va);
 425                 fflush(stdout);
 426         }
 427 }
 428
 429 static void imap_warn(const char *msg, ...)
 430 {
 431         va_list va;
 432
 433         if (Quiet < 2) {
 434                 va_start(va, msg);
 435                 vfprintf(stderr, msg, va);
 436                 va_end(va);
 437         }
 438 }
 439
 440 static char *next_arg(char **s)
 441 {
 442         char *ret;
 443
 444         if (!s || !*s)
 445                 return NULL;
 446         while (isspace((unsigned char) **s))
 447                 (*s)++;
 448         if (!**s) {
 449                 *s = NULL;
 450                 return NULL;
 451         }
 452         if (**s == '"') {
 453                 ++*s;
 454                 ret = *s;
 455                 *s = strchr(*s, '"');
 456         } else {
 457                 ret = *s;
 458                 while (**s && !isspace((unsigned char) **s))
 459                         (*s)++;
 460         }
 461         if (*s) {
 462                 if (**s)
 463                         *(*s)++ = 0;
 464                 if (!**s)
 465                         *s = NULL;
 466         }
 467         return ret;
 468 }
 469
 470 static void free_generic_messages(struct message *msgs)
 471 {
 472         struct message *tmsg;
 473
 474         for (; msgs; msgs = tmsg) {
 475                 tmsg = msgs->next;
 476                 free(msgs);
 477         }
 478 }
 479
 480 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 481 {
 482         int ret;
 483         va_list va;
 484
 485         va_start(va, fmt);
 486         if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 487                 die("Fatal: buffer too small. Please report a bug.");
 488         va_end(va);
 489         return ret;
 490 }
 491
 492 static struct {
 493         unsigned char i, j, s[256];
 494 } rs;
 495
 496 static void arc4_init(void)
 497 {
 498         int i, fd;
 499         unsigned char j, si, dat[128];
 500
 501         if ((fd = open("/dev/urandom", O_RDONLY)) < 0 && (fd = open("/dev/random", O_RDONLY)) < 0) {
 502                 fprintf(stderr, "Fatal: no random number source available.\n");
 503                 exit(3);
 504         }
 505         if (read_in_full(fd, dat, 128) != 128) {
 506                 fprintf(stderr, "Fatal: cannot read random number source.\n");
 507                 exit(3);
 508         }
 509         close(fd);
 510
 511         for (i = 0; i < 256; i++)
 512                 rs.s[i] = i;
 513         for (i = j = 0; i < 256; i++) {
 514                 si = rs.s[i];
 515                 j += si + dat[i & 127];
 516                 rs.s[i] = rs.s[j];
 517                 rs.s[j] = si;
 518         }
 519         rs.i = rs.j = 0;
 520
 521         for (i = 0; i < 256; i++)
 522                 arc4_getbyte();
 523 }
 524
 525 static unsigned char arc4_getbyte(void)
 526 {
 527         unsigned char si, sj;
 528
 529         rs.i++;
 530         si = rs.s[rs.i];
 531         rs.j += si;
 532         sj = rs.s[rs.j];
 533         rs.s[rs.i] = sj;
 534         rs.s[rs.j] = si;
 535         return rs.s[(si + sj) & 0xff];
 536 }
 537
 538 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 539                                          struct imap_cmd_cb *cb,
 540                                          const char *fmt, va_list ap)
 541 {
 542         struct imap *imap = ctx->imap;
 543         struct imap_cmd *cmd;
 544         int n, bufl;
 545         char buf[1024];
 546
 547         cmd = xmalloc(sizeof(struct imap_cmd));
 548         nfvasprintf(&cmd->cmd, fmt, ap);
 549         cmd->tag = ++imap->nexttag;
 550
 551         if (cb)
 552                 cmd->cb = *cb;
 553         else
 554                 memset(&cmd->cb, 0, sizeof(cmd->cb));
 555
 556         while (imap->literal_pending)
 557                 get_cmd_result(ctx, NULL);
 558
 559         bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
 560                            "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
 561                            cmd->tag, cmd->cmd, cmd->cb.dlen);
 562         if (Verbose) {
 563                 if (imap->num_in_progress)
 564                         printf("(%d in progress) ", imap->num_in_progress);
 565                 if (memcmp(cmd->cmd, "LOGIN", 5))
 566                         printf(">>> %s", buf);
 567                 else
 568                         printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 569         }
 570         if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 571                 free(cmd->cmd);
 572                 free(cmd);
 573                 if (cb)
 574                         free(cb->data);
 575                 return NULL;
 576         }
 577         if (cmd->cb.data) {
 578                 if (CAP(LITERALPLUS)) {
 579                         n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 580                         free(cmd->cb.data);
 581                         if (n != cmd->cb.dlen ||
 582                             socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 583                                 free(cmd->cmd);
 584                                 free(cmd);
 585                                 return NULL;
 586                         }
 587                         cmd->cb.data = NULL;
 588                 } else
 589                         imap->literal_pending = 1;
 590         } else if (cmd->cb.cont)
 591                 imap->literal_pending = 1;
 592         cmd->next = NULL;
 593         *imap->in_progress_append = cmd;
 594         imap->in_progress_append = &cmd->next;
 595         imap->num_in_progress++;
 596         return cmd;
 597 }
 598
 599 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 600                                        struct imap_cmd_cb *cb,
 601                                        const char *fmt, ...)
 602 {
 603         struct imap_cmd *ret;
 604         va_list ap;
 605
 606         va_start(ap, fmt);
 607         ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 608         va_end(ap);
 609         return ret;
 610 }
 611
 612 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 613                      const char *fmt, ...)
 614 {
 615         va_list ap;
 616         struct imap_cmd *cmdp;
 617
 618         va_start(ap, fmt);
 619         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 620         va_end(ap);
 621         if (!cmdp)
 622                 return RESP_BAD;
 623
 624         return get_cmd_result(ctx, cmdp);
 625 }
 626
 627 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 628                        const char *fmt, ...)
 629 {
 630         va_list ap;
 631         struct imap_cmd *cmdp;
 632
 633         va_start(ap, fmt);
 634         cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 635         va_end(ap);
 636         if (!cmdp)
 637                 return DRV_STORE_BAD;
 638
 639         switch (get_cmd_result(ctx, cmdp)) {
 640         case RESP_BAD: return DRV_STORE_BAD;
 641         case RESP_NO: return DRV_MSG_BAD;
 642         default: return DRV_OK;
 643         }
 644 }
 645
 646 static int is_atom(struct imap_list *list)
 647 {
 648         return list && list->val && list->val != NIL && list->val != LIST;
 649 }
 650
 651 static int is_list(struct imap_list *list)
 652 {
 653         return list && list->val == LIST;
 654 }
 655
 656 static void free_list(struct imap_list *list)
 657 {
 658         struct imap_list *tmp;
 659
 660         for (; list; list = tmp) {
 661                 tmp = list->next;
 662                 if (is_list(list))
 663                         free_list(list->child);
 664                 else if (is_atom(list))
 665                         free(list->val);
 666                 free(list);
 667         }
 668 }
 669
 670 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
 671 {
 672         struct imap_list *cur;
 673         char *s = *sp, *p;
 674         int n, bytes;
 675
 676         for (;;) {
 677                 while (isspace((unsigned char)*s))
 678                         s++;
 679                 if (level && *s == ')') {
 680                         s++;
 681                         break;
 682                 }
 683                 *curp = cur = xmalloc(sizeof(*cur));
 684                 curp = &cur->next;
 685                 cur->val = NULL; /* for clean bail */
 686                 if (*s == '(') {
 687                         /* sublist */
 688                         s++;
 689                         cur->val = LIST;
 690                         if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
 691                                 goto bail;
 692                 } else if (imap && *s == '{') {
 693                         /* literal */
 694                         bytes = cur->len = strtol(s + 1, &s, 10);
 695                         if (*s != '}')
 696                                 goto bail;
 697
 698                         s = cur->val = xmalloc(cur->len);
 699
 700                         /* dump whats left over in the input buffer */
 701                         n = imap->buf.bytes - imap->buf.offset;
 702
 703                         if (n > bytes)
 704                                 /* the entire message fit in the buffer */
 705                                 n = bytes;
 706
 707                         memcpy(s, imap->buf.buf + imap->buf.offset, n);
 708                         s += n;
 709                         bytes -= n;
 710
 711                         /* mark that we used part of the buffer */
 712                         imap->buf.offset += n;
 713
 714                         /* now read the rest of the message */
 715                         while (bytes > 0) {
 716                                 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
 717                                         goto bail;
 718                                 s += n;
 719                                 bytes -= n;
 720                         }
 721
 722                         if (buffer_gets(&imap->buf, &s))
 723                                 goto bail;
 724                 } else if (*s == '"') {
 725                         /* quoted string */
 726                         s++;
 727                         p = s;
 728                         for (; *s != '"'; s++)
 729                                 if (!*s)
 730                                         goto bail;
 731                         cur->len = s - p;
 732                         s++;
 733                         cur->val = xmemdupz(p, cur->len);
 734                 } else {
 735                         /* atom */
 736                         p = s;
 737                         for (; *s && !isspace((unsigned char)*s); s++)
 738                                 if (level && *s == ')')
 739                                         break;
 740                         cur->len = s - p;
 741                         if (cur->len == 3 && !memcmp("NIL", p, 3))
 742                                 cur->val = NIL;
 743                         else
 744                                 cur->val = xmemdupz(p, cur->len);
 745                 }
 746
 747                 if (!level)
 748                         break;
 749                 if (!*s)
 750                         goto bail;
 751         }
 752         *sp = s;
 753         *curp = NULL;
 754         return 0;
 755
 756 bail:
 757         *curp = NULL;
 758         return -1;
 759 }
 760
 761 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
 762 {
 763         struct imap_list *head;
 764
 765         if (!parse_imap_list_l(imap, sp, &head, 0))
 766                 return head;
 767         free_list(head);
 768         return NULL;
 769 }
 770
 771 static struct imap_list *parse_list(char **sp)
 772 {
 773         return parse_imap_list(NULL, sp);
 774 }
 775
 776 static void parse_capability(struct imap *imap, char *cmd)
 777 {
 778         char *arg;
 779         unsigned i;
 780
 781         imap->caps = 0x80000000;
 782         while ((arg = next_arg(&cmd)))
 783                 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 784                         if (!strcmp(cap_list[i], arg))
 785                                 imap->caps |= 1 << i;
 786         imap->rcaps = imap->caps;
 787 }
 788
 789 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 790                                char *s)
 791 {
 792         struct imap *imap = ctx->imap;
 793         char *arg, *p;
 794
 795         if (*s != '[')
 796                 return RESP_OK;         /* no response code */
 797         s++;
 798         if (!(p = strchr(s, ']'))) {
 799                 fprintf(stderr, "IMAP error: malformed response code\n");
 800                 return RESP_BAD;
 801         }
 802         *p++ = 0;
 803         arg = next_arg(&s);
 804         if (!strcmp("UIDVALIDITY", arg)) {
 805                 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 806                         fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 807                         return RESP_BAD;
 808                 }
 809         } else if (!strcmp("UIDNEXT", arg)) {
 810                 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 811                         fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 812                         return RESP_BAD;
 813                 }
 814         } else if (!strcmp("CAPABILITY", arg)) {
 815                 parse_capability(imap, s);
 816         } else if (!strcmp("ALERT", arg)) {
 817                 /* RFC2060 says that these messages MUST be displayed
 818                  * to the user
 819                  */
 820                 for (; isspace((unsigned char)*p); p++);
 821                 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 822         } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 823                 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 824                     !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 825                         fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 826                         return RESP_BAD;
 827                 }
 828         }
 829         return RESP_OK;
 830 }
 831
 832 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 833 {
 834         struct imap *imap = ctx->imap;
 835         struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 836         char *cmd, *arg, *arg1, *p;
 837         int n, resp, resp2, tag;
 838
 839         for (;;) {
 840                 if (buffer_gets(&imap->buf, &cmd))
 841                         return RESP_BAD;
 842
 843                 arg = next_arg(&cmd);
 844                 if (*arg == '*') {
 845                         arg = next_arg(&cmd);
 846                         if (!arg) {
 847                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 848                                 return RESP_BAD;
 849                         }
 850
 851                         if (!strcmp("NAMESPACE", arg)) {
 852                                 imap->ns_personal = parse_list(&cmd);
 853                                 imap->ns_other = parse_list(&cmd);
 854                                 imap->ns_shared = parse_list(&cmd);
 855                         } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 856                                    !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 857                                 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 858                                         return resp;
 859                         } else if (!strcmp("CAPABILITY", arg))
 860                                 parse_capability(imap, cmd);
 861                         else if ((arg1 = next_arg(&cmd))) {
 862                                 if (!strcmp("EXISTS", arg1))
 863                                         ctx->gen.count = atoi(arg);
 864                                 else if (!strcmp("RECENT", arg1))
 865                                         ctx->gen.recent = atoi(arg);
 866                         } else {
 867                                 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 868                                 return RESP_BAD;
 869                         }
 870                 } else if (!imap->in_progress) {
 871                         fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 872                         return RESP_BAD;
 873                 } else if (*arg == '+') {
 874                         /* This can happen only with the last command underway, as
 875                            it enforces a round-trip. */
 876                         cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 877                                offsetof(struct imap_cmd, next));
 878                         if (cmdp->cb.data) {
 879                                 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 880                                 free(cmdp->cb.data);
 881                                 cmdp->cb.data = NULL;
 882                                 if (n != (int)cmdp->cb.dlen)
 883                                         return RESP_BAD;
 884                         } else if (cmdp->cb.cont) {
 885                                 if (cmdp->cb.cont(ctx, cmdp, cmd))
 886                                         return RESP_BAD;
 887                         } else {
 888                                 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 889                                 return RESP_BAD;
 890                         }
 891                         if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 892                                 return RESP_BAD;
 893                         if (!cmdp->cb.cont)
 894                                 imap->literal_pending = 0;
 895                         if (!tcmd)
 896                                 return DRV_OK;
 897                 } else {
 898                         tag = atoi(arg);
 899                         for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 900                                 if (cmdp->tag == tag)
 901                                         goto gottag;
 902                         fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 903                         return RESP_BAD;
 904                 gottag:
 905                         if (!(*pcmdp = cmdp->next))
 906                                 imap->in_progress_append = pcmdp;
 907                         imap->num_in_progress--;
 908                         if (cmdp->cb.cont || cmdp->cb.data)
 909                                 imap->literal_pending = 0;
 910                         arg = next_arg(&cmd);
 911                         if (!strcmp("OK", arg))
 912                                 resp = DRV_OK;
 913                         else {
 914                                 if (!strcmp("NO", arg)) {
 915                                         if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 916                                                 p = strchr(cmdp->cmd, '"');
 917                                                 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", strchr(p + 1, '"') - p + 1, p)) {
 918                                                         resp = RESP_BAD;
 919                                                         goto normal;
 920                                                 }
 921                                                 /* not waiting here violates the spec, but a server that does not
 922                                                    grok this nonetheless violates it too. */
 923                                                 cmdp->cb.create = 0;
 924                                                 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 925                                                         resp = RESP_BAD;
 926                                                         goto normal;
 927                                                 }
 928                                                 free(cmdp->cmd);
 929                                                 free(cmdp);
 930                                                 if (!tcmd)
 931                                                         return 0;       /* ignored */
 932                                                 if (cmdp == tcmd)
 933                                                         tcmd = ncmdp;
 934                                                 continue;
 935                                         }
 936                                         resp = RESP_NO;
 937                                 } else /*if (!strcmp("BAD", arg))*/
 938                                         resp = RESP_BAD;
 939                                 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 940                                          memcmp(cmdp->cmd, "LOGIN", 5) ?
 941                                                         cmdp->cmd : "LOGIN <user> <pass>",
 942                                                         arg, cmd ? cmd : "");
 943                         }
 944                         if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 945                                 resp = resp2;
 946                 normal:
 947                         if (cmdp->cb.done)
 948                                 cmdp->cb.done(ctx, cmdp, resp);
 949                         free(cmdp->cb.data);
 950                         free(cmdp->cmd);
 951                         free(cmdp);
 952                         if (!tcmd || tcmd == cmdp)
 953                                 return resp;
 954                 }
 955         }
 956         /* not reached */
 957 }
 958
 959 static void imap_close_server(struct imap_store *ictx)
 960 {
 961         struct imap *imap = ictx->imap;
 962
 963         if (imap->buf.sock.fd != -1) {
 964                 imap_exec(ictx, NULL, "LOGOUT");
 965                 socket_shutdown(&imap->buf.sock);
 966         }
 967         free_list(imap->ns_personal);
 968         free_list(imap->ns_other);
 969         free_list(imap->ns_shared);
 970         free(imap);
 971 }
 972
 973 static void imap_close_store(struct store *ctx)
 974 {
 975         imap_close_server((struct imap_store *)ctx);
 976         free_generic_messages(ctx->msgs);
 977         free(ctx);
 978 }
 979
 980 static struct store *imap_open_store(struct imap_server_conf *srvc)
 981 {
 982         struct imap_store *ctx;
 983         struct imap *imap;
 984         char *arg, *rsp;
 985         struct hostent *he;
 986         struct sockaddr_in addr;
 987         int s, a[2], preauth;
 988         pid_t pid;
 989
 990         ctx = xcalloc(sizeof(*ctx), 1);
 991
 992         ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 993         imap->buf.sock.fd = -1;
 994         imap->in_progress_append = &imap->in_progress;
 995
 996         /* open connection to IMAP server */
 997
 998         if (srvc->tunnel) {
 999                 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
1000
1001                 if (socketpair(PF_UNIX, SOCK_STREAM, 0, a)) {
1002                         perror("socketpair");
1003                         exit(1);
1004                 }
1005
1006                 pid = fork();
1007                 if (pid < 0)
1008                         _exit(127);
1009                 if (!pid) {
1010                         if (dup2(a[0], 0) == -1 || dup2(a[0], 1) == -1)
1011                                 _exit(127);
1012                         close(a[0]);
1013                         close(a[1]);
1014                         execl("/bin/sh", "sh", "-c", srvc->tunnel, NULL);
1015                         _exit(127);
1016                 }
1017
1018                 close(a[0]);
1019
1020                 imap->buf.sock.fd = a[1];
1021
1022                 imap_info("ok\n");
1023         } else {
1024                 memset(&addr, 0, sizeof(addr));
1025                 addr.sin_port = htons(srvc->port);
1026                 addr.sin_family = AF_INET;
1027
1028                 imap_info("Resolving %s... ", srvc->host);
1029                 he = gethostbyname(srvc->host);
1030                 if (!he) {
1031                         perror("gethostbyname");
1032                         goto bail;
1033                 }
1034                 imap_info("ok\n");
1035
1036                 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1037
1038                 s = socket(PF_INET, SOCK_STREAM, 0);
1039
1040                 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1041                 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1042                         close(s);
1043                         perror("connect");
1044                         goto bail;
1045                 }
1046
1047                 imap->buf.sock.fd = s;
1048
1049                 if (srvc->use_ssl &&
1050                     ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1051                         close(s);
1052                         goto bail;
1053                 }
1054                 imap_info("ok\n");
1055         }
1056
1057         /* read the greeting string */
1058         if (buffer_gets(&imap->buf, &rsp)) {
1059                 fprintf(stderr, "IMAP error: no greeting response\n");
1060                 goto bail;
1061         }
1062         arg = next_arg(&rsp);
1063         if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1064                 fprintf(stderr, "IMAP error: invalid greeting response\n");
1065                 goto bail;
1066         }
1067         preauth = 0;
1068         if (!strcmp("PREAUTH", arg))
1069                 preauth = 1;
1070         else if (strcmp("OK", arg) != 0) {
1071                 fprintf(stderr, "IMAP error: unknown greeting response\n");
1072                 goto bail;
1073         }
1074         parse_response_code(ctx, NULL, rsp);
1075         if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076                 goto bail;
1077
1078         if (!preauth) {
1079 #ifndef NO_OPENSSL
1080                 if (!srvc->use_ssl && CAP(STARTTLS)) {
1081                         if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1082                                 goto bail;
1083                         if (ssl_socket_connect(&imap->buf.sock, 1,
1084                                                srvc->ssl_verify))
1085                                 goto bail;
1086                         /* capabilities may have changed, so get the new capabilities */
1087                         if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1088                                 goto bail;
1089                 }
1090 #endif
1091                 imap_info("Logging in...\n");
1092                 if (!srvc->user) {
1093                         fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1094                         goto bail;
1095                 }
1096                 if (!srvc->pass) {
1097                         char prompt[80];
1098                         sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1099                         arg = getpass(prompt);
1100                         if (!arg) {
1101                                 perror("getpass");
1102                                 exit(1);
1103                         }
1104                         if (!*arg) {
1105                                 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1106                                 goto bail;
1107                         }
1108                         /*
1109                          * getpass() returns a pointer to a static buffer.  make a copy
1110                          * for long term storage.
1111                          */
1112                         srvc->pass = xstrdup(arg);
1113                 }
1114                 if (CAP(NOLOGIN)) {
1115                         fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1116                         goto bail;
1117                 }
1118                 if (!imap->buf.sock.ssl)
1119                         imap_warn("*** IMAP Warning *** Password is being "
1120                                   "sent in the clear\n");
1121                 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1122                         fprintf(stderr, "IMAP error: LOGIN failed\n");
1123                         goto bail;
1124                 }
1125         } /* !preauth */
1126
1127         ctx->prefix = "";
1128         ctx->trashnc = 1;
1129         return (struct store *)ctx;
1130
1131 bail:
1132         imap_close_store(&ctx->gen);
1133         return NULL;
1134 }
1135
1136 static int imap_make_flags(int flags, char *buf)
1137 {
1138         const char *s;
1139         unsigned i, d;
1140
1141         for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1142                 if (flags & (1 << i)) {
1143                         buf[d++] = ' ';
1144                         buf[d++] = '\\';
1145                         for (s = Flags[i]; *s; s++)
1146                                 buf[d++] = *s;
1147                 }
1148         buf[0] = '(';
1149         buf[d++] = ')';
1150         return d;
1151 }
1152
1153 #define TUIDL 8
1154
1155 static int imap_store_msg(struct store *gctx, struct msg_data *data, int *uid)
1156 {
1157         struct imap_store *ctx = (struct imap_store *)gctx;
1158         struct imap *imap = ctx->imap;
1159         struct imap_cmd_cb cb;
1160         char *fmap, *buf;
1161         const char *prefix, *box;
1162         int ret, i, j, d, len, extra, nocr;
1163         int start, sbreak = 0, ebreak = 0;
1164         char flagstr[128], tuid[TUIDL * 2 + 1];
1165
1166         memset(&cb, 0, sizeof(cb));
1167
1168         fmap = data->data;
1169         len = data->len;
1170         nocr = !data->crlf;
1171         extra = 0, i = 0;
1172         if (!CAP(UIDPLUS) && uid) {
1173         nloop:
1174                 start = i;
1175                 while (i < len)
1176                         if (fmap[i++] == '\n') {
1177                                 extra += nocr;
1178                                 if (i - 2 + nocr == start) {
1179                                         sbreak = ebreak = i - 2 + nocr;
1180                                         goto mktid;
1181                                 }
1182                                 if (!memcmp(fmap + start, "X-TUID: ", 8)) {
1183                                         extra -= (ebreak = i) - (sbreak = start) + nocr;
1184                                         goto mktid;
1185                                 }
1186                                 goto nloop;
1187                         }
1188                 /* invalid message */
1189                 free(fmap);
1190                 return DRV_MSG_BAD;
1191         mktid:
1192                 for (j = 0; j < TUIDL; j++)
1193                         sprintf(tuid + j * 2, "%02x", arc4_getbyte());
1194                 extra += 8 + TUIDL * 2 + 2;
1195         }
1196         if (nocr)
1197                 for (; i < len; i++)
1198                         if (fmap[i] == '\n')
1199                                 extra++;
1200
1201         cb.dlen = len + extra;
1202         buf = cb.data = xmalloc(cb.dlen);
1203         i = 0;
1204         if (!CAP(UIDPLUS) && uid) {
1205                 if (nocr) {
1206                         for (; i < sbreak; i++)
1207                                 if (fmap[i] == '\n') {
1208                                         *buf++ = '\r';
1209                                         *buf++ = '\n';
1210                                 } else
1211                                         *buf++ = fmap[i];
1212                 } else {
1213                         memcpy(buf, fmap, sbreak);
1214                         buf += sbreak;
1215                 }
1216                 memcpy(buf, "X-TUID: ", 8);
1217                 buf += 8;
1218                 memcpy(buf, tuid, TUIDL * 2);
1219                 buf += TUIDL * 2;
1220                 *buf++ = '\r';
1221                 *buf++ = '\n';
1222                 i = ebreak;
1223         }
1224         if (nocr) {
1225                 for (; i < len; i++)
1226                         if (fmap[i] == '\n') {
1227                                 *buf++ = '\r';
1228                                 *buf++ = '\n';
1229                         } else
1230                                 *buf++ = fmap[i];
1231         } else
1232                 memcpy(buf, fmap + i, len - i);
1233
1234         free(fmap);
1235
1236         d = 0;
1237         if (data->flags) {
1238                 d = imap_make_flags(data->flags, flagstr);
1239                 flagstr[d++] = ' ';
1240         }
1241         flagstr[d] = 0;
1242
1243         if (!uid) {
1244                 box = gctx->conf->trash;
1245                 prefix = ctx->prefix;
1246                 cb.create = 1;
1247                 if (ctx->trashnc)
1248                         imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
1249         } else {
1250                 box = gctx->name;
1251                 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1252                 cb.create = 0;
1253         }
1254         cb.ctx = uid;
1255         ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1256         imap->caps = imap->rcaps;
1257         if (ret != DRV_OK)
1258                 return ret;
1259         if (!uid)
1260                 ctx->trashnc = 0;
1261         else
1262                 gctx->count++;
1263
1264         return DRV_OK;
1265 }
1266
1267 static void encode_html_chars(struct strbuf *p)
1268 {
1269         int i;
1270         for (i = 0; i < p->len; i++) {
1271                 if (p->buf[i] == '&')
1272                         strbuf_splice(p, i, 1, "&amp;", 5);
1273                 if (p->buf[i] == '<')
1274                         strbuf_splice(p, i, 1, "&lt;", 4);
1275                 if (p->buf[i] == '>')
1276                         strbuf_splice(p, i, 1, "&gt;", 4);
1277                 if (p->buf[i] == '"')
1278                         strbuf_splice(p, i, 1, "&quot;", 6);
1279         }
1280 }
1281 static void wrap_in_html(struct msg_data *msg)
1282 {
1283         struct strbuf buf = STRBUF_INIT;
1284         struct strbuf **lines;
1285         struct strbuf **p;
1286         static char *content_type = "Content-Type: text/html;\n";
1287         static char *pre_open = "<pre>\n";
1288         static char *pre_close = "</pre>\n";
1289         int added_header = 0;
1290
1291         strbuf_attach(&buf, msg->data, msg->len, msg->len);
1292         lines = strbuf_split(&buf, '\n');
1293         strbuf_release(&buf);
1294         for (p = lines; *p; p++) {
1295                 if (! added_header) {
1296                         if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1297                                 strbuf_addstr(&buf, content_type);
1298                                 strbuf_addbuf(&buf, *p);
1299                                 strbuf_addstr(&buf, pre_open);
1300                                 added_header = 1;
1301                                 continue;
1302                         }
1303                 }
1304                 else
1305                         encode_html_chars(*p);
1306                 strbuf_addbuf(&buf, *p);
1307         }
1308         strbuf_addstr(&buf, pre_close);
1309         strbuf_list_free(lines);
1310         msg->len  = buf.len;
1311         msg->data = strbuf_detach(&buf, NULL);
1312 }
1313
1314 #define CHUNKSIZE 0x1000
1315
1316 static int read_message(FILE *f, struct msg_data *msg)
1317 {
1318         struct strbuf buf = STRBUF_INIT;
1319
1320         memset(msg, 0, sizeof(*msg));
1321
1322         do {
1323                 if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1324                         break;
1325         } while (!feof(f));
1326
1327         msg->len  = buf.len;
1328         msg->data = strbuf_detach(&buf, NULL);
1329         return msg->len;
1330 }
1331
1332 static int count_messages(struct msg_data *msg)
1333 {
1334         int count = 0;
1335         char *p = msg->data;
1336
1337         while (1) {
1338                 if (!prefixcmp(p, "From ")) {
1339                         count++;
1340                         p += 5;
1341                 }
1342                 p = strstr(p+5, "\nFrom ");
1343                 if (!p)
1344                         break;
1345                 p++;
1346         }
1347         return count;
1348 }
1349
1350 static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1351 {
1352         char *p, *data;
1353
1354         memset(msg, 0, sizeof *msg);
1355         if (*ofs >= all_msgs->len)
1356                 return 0;
1357
1358         data = &all_msgs->data[*ofs];
1359         msg->len = all_msgs->len - *ofs;
1360
1361         if (msg->len < 5 || prefixcmp(data, "From "))
1362                 return 0;
1363
1364         p = strchr(data, '\n');
1365         if (p) {
1366                 p = &p[1];
1367                 msg->len -= p-data;
1368                 *ofs += p-data;
1369                 data = p;
1370         }
1371
1372         p = strstr(data, "\nFrom ");
1373         if (p)
1374                 msg->len = &p[1] - data;
1375
1376         msg->data = xmemdupz(data, msg->len);
1377         *ofs += msg->len;
1378         return 1;
1379 }
1380
1381 static struct imap_server_conf server = {
1382         NULL,   /* name */
1383         NULL,   /* tunnel */
1384         NULL,   /* host */
1385         0,      /* port */
1386         NULL,   /* user */
1387         NULL,   /* pass */
1388         0,      /* use_ssl */
1389         1,      /* ssl_verify */
1390         0,      /* use_html */
1391 };
1392
1393 static char *imap_folder;
1394
1395 static int git_imap_config(const char *key, const char *val, void *cb)
1396 {
1397         char imap_key[] = "imap.";
1398
1399         if (strncmp(key, imap_key, sizeof imap_key - 1))
1400                 return 0;
1401
1402         if (!val)
1403                 return config_error_nonbool(key);
1404
1405         key += sizeof imap_key - 1;
1406
1407         if (!strcmp("folder", key)) {
1408                 imap_folder = xstrdup(val);
1409         } else if (!strcmp("host", key)) {
1410                 if (!prefixcmp(val, "imap:"))
1411                         val += 5;
1412                 else if (!prefixcmp(val, "imaps:")) {
1413                         val += 6;
1414                         server.use_ssl = 1;
1415                 }
1416                 if (!prefixcmp(val, "//"))
1417                         val += 2;
1418                 server.host = xstrdup(val);
1419         } else if (!strcmp("user", key))
1420                 server.user = xstrdup(val);
1421         else if (!strcmp("pass", key))
1422                 server.pass = xstrdup(val);
1423         else if (!strcmp("port", key))
1424                 server.port = git_config_int(key, val);
1425         else if (!strcmp("tunnel", key))
1426                 server.tunnel = xstrdup(val);
1427         else if (!strcmp("sslverify", key))
1428                 server.ssl_verify = git_config_bool(key, val);
1429         else if (!strcmp("preformattedHTML", key))
1430                 server.use_html = git_config_bool(key, val);
1431         return 0;
1432 }
1433
1434 int main(int argc, char **argv)
1435 {
1436         struct msg_data all_msgs, msg;
1437         struct store *ctx = NULL;
1438         int uid = 0;
1439         int ofs = 0;
1440         int r;
1441         int total, n = 0;
1442         int nongit_ok;
1443
1444         git_extract_argv0_path(argv[0]);
1445
1446         /* init the random number generator */
1447         arc4_init();
1448
1449         setup_git_directory_gently(&nongit_ok);
1450         git_config(git_imap_config, NULL);
1451
1452         if (!server.port)
1453                 server.port = server.use_ssl ? 993 : 143;
1454
1455         if (!imap_folder) {
1456                 fprintf(stderr, "no imap store specified\n");
1457                 return 1;
1458         }
1459         if (!server.host) {
1460                 if (!server.tunnel) {
1461                         fprintf(stderr, "no imap host specified\n");
1462                         return 1;
1463                 }
1464                 server.host = "tunnel";
1465         }
1466
1467         /* read the messages */
1468         if (!read_message(stdin, &all_msgs)) {
1469                 fprintf(stderr, "nothing to send\n");
1470                 return 1;
1471         }
1472
1473         total = count_messages(&all_msgs);
1474         if (!total) {
1475                 fprintf(stderr, "no messages to send\n");
1476                 return 1;
1477         }
1478
1479         /* write it to the imap server */
1480         ctx = imap_open_store(&server);
1481         if (!ctx) {
1482                 fprintf(stderr, "failed to open store\n");
1483                 return 1;
1484         }
1485
1486         fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1487         ctx->name = imap_folder;
1488         while (1) {
1489                 unsigned percent = n * 100 / total;
1490                 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1491                 if (!split_msg(&all_msgs, &msg, &ofs))
1492                         break;
1493                 if (server.use_html)
1494                         wrap_in_html(&msg);
1495                 r = imap_store_msg(ctx, &msg, &uid);
1496                 if (r != DRV_OK)
1497                         break;
1498                 n++;
1499         }
1500         fprintf(stderr, "\n");
1501
1502         imap_close_store(ctx);
1503
1504         return 0;
1505 }