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