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