bb9b7279f86640916226ca687b6007ac52a71419
   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#include "run-command.h"
  28#include "prompt.h"
  29#ifdef NO_OPENSSL
  30typedef void *SSL;
  31#else
  32#include <openssl/evp.h>
  33#include <openssl/hmac.h>
  34#endif
  35
  36struct store {
  37        /* currently open mailbox */
  38        const char *name; /* foreign! maybe preset? */
  39        int uidvalidity;
  40};
  41
  42static const char imap_send_usage[] = "git imap-send < <mbox>";
  43
  44#undef DRV_OK
  45#define DRV_OK          0
  46#define DRV_MSG_BAD     -1
  47#define DRV_BOX_BAD     -2
  48#define DRV_STORE_BAD   -3
  49
  50static int Verbose, Quiet;
  51
  52__attribute__((format (printf, 1, 2)))
  53static void imap_info(const char *, ...);
  54__attribute__((format (printf, 1, 2)))
  55static void imap_warn(const char *, ...);
  56
  57static char *next_arg(char **);
  58
  59__attribute__((format (printf, 3, 4)))
  60static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  61
  62static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  63{
  64        int len;
  65        char tmp[8192];
  66
  67        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  68        if (len < 0)
  69                die("Fatal: Out of memory");
  70        if (len >= sizeof(tmp))
  71                die("imap command overflow!");
  72        *strp = xmemdupz(tmp, len);
  73        return len;
  74}
  75
  76struct imap_server_conf {
  77        char *name;
  78        char *tunnel;
  79        char *host;
  80        int port;
  81        char *user;
  82        char *pass;
  83        int use_ssl;
  84        int ssl_verify;
  85        int use_html;
  86        char *auth_method;
  87};
  88
  89static struct imap_server_conf server = {
  90        NULL,   /* name */
  91        NULL,   /* tunnel */
  92        NULL,   /* host */
  93        0,      /* port */
  94        NULL,   /* user */
  95        NULL,   /* pass */
  96        0,      /* use_ssl */
  97        1,      /* ssl_verify */
  98        0,      /* use_html */
  99        NULL,   /* auth_method */
 100};
 101
 102#define NIL     (void *)0x1
 103#define LIST    (void *)0x2
 104
 105struct imap_list {
 106        struct imap_list *next, *child;
 107        char *val;
 108        int len;
 109};
 110
 111struct imap_socket {
 112        int fd[2];
 113        SSL *ssl;
 114};
 115
 116struct imap_buffer {
 117        struct imap_socket sock;
 118        int bytes;
 119        int offset;
 120        char buf[1024];
 121};
 122
 123struct imap_cmd;
 124
 125struct imap {
 126        int uidnext; /* from SELECT responses */
 127        struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
 128        unsigned caps, rcaps; /* CAPABILITY results */
 129        /* command queue */
 130        int nexttag, num_in_progress, literal_pending;
 131        struct imap_cmd *in_progress, **in_progress_append;
 132        struct imap_buffer buf; /* this is BIG, so put it last */
 133};
 134
 135struct imap_store {
 136        struct store gen;
 137        int uidvalidity;
 138        struct imap *imap;
 139        const char *prefix;
 140        unsigned /*currentnc:1,*/ trashnc:1;
 141};
 142
 143struct imap_cmd_cb {
 144        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 145        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 146        void *ctx;
 147        char *data;
 148        int dlen;
 149        int uid;
 150        unsigned create:1, trycreate:1;
 151};
 152
 153struct imap_cmd {
 154        struct imap_cmd *next;
 155        struct imap_cmd_cb cb;
 156        char *cmd;
 157        int tag;
 158};
 159
 160#define CAP(cap) (imap->caps & (1 << (cap)))
 161
 162enum CAPABILITY {
 163        NOLOGIN = 0,
 164        UIDPLUS,
 165        LITERALPLUS,
 166        NAMESPACE,
 167        STARTTLS,
 168        AUTH_CRAM_MD5
 169};
 170
 171static const char *cap_list[] = {
 172        "LOGINDISABLED",
 173        "UIDPLUS",
 174        "LITERAL+",
 175        "NAMESPACE",
 176        "STARTTLS",
 177        "AUTH=CRAM-MD5",
 178};
 179
 180#define RESP_OK    0
 181#define RESP_NO    1
 182#define RESP_BAD   2
 183
 184static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 185
 186
 187#ifndef NO_OPENSSL
 188static void ssl_socket_perror(const char *func)
 189{
 190        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 191}
 192#endif
 193
 194static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 195{
 196#ifndef NO_OPENSSL
 197        if (sock->ssl) {
 198                int sslerr = SSL_get_error(sock->ssl, ret);
 199                switch (sslerr) {
 200                case SSL_ERROR_NONE:
 201                        break;
 202                case SSL_ERROR_SYSCALL:
 203                        perror("SSL_connect");
 204                        break;
 205                default:
 206                        ssl_socket_perror("SSL_connect");
 207                        break;
 208                }
 209        } else
 210#endif
 211        {
 212                if (ret < 0)
 213                        perror(func);
 214                else
 215                        fprintf(stderr, "%s: unexpected EOF\n", func);
 216        }
 217}
 218
 219static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 220{
 221#ifdef NO_OPENSSL
 222        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 223        return -1;
 224#else
 225#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 226        const SSL_METHOD *meth;
 227#else
 228        SSL_METHOD *meth;
 229#endif
 230        SSL_CTX *ctx;
 231        int ret;
 232
 233        SSL_library_init();
 234        SSL_load_error_strings();
 235
 236        if (use_tls_only)
 237                meth = TLSv1_method();
 238        else
 239                meth = SSLv23_method();
 240
 241        if (!meth) {
 242                ssl_socket_perror("SSLv23_method");
 243                return -1;
 244        }
 245
 246        ctx = SSL_CTX_new(meth);
 247
 248        if (verify)
 249                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 250
 251        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 252                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 253                return -1;
 254        }
 255        sock->ssl = SSL_new(ctx);
 256        if (!sock->ssl) {
 257                ssl_socket_perror("SSL_new");
 258                return -1;
 259        }
 260        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 261                ssl_socket_perror("SSL_set_rfd");
 262                return -1;
 263        }
 264        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 265                ssl_socket_perror("SSL_set_wfd");
 266                return -1;
 267        }
 268
 269        ret = SSL_connect(sock->ssl);
 270        if (ret <= 0) {
 271                socket_perror("SSL_connect", sock, ret);
 272                return -1;
 273        }
 274
 275        return 0;
 276#endif
 277}
 278
 279static int socket_read(struct imap_socket *sock, char *buf, int len)
 280{
 281        ssize_t n;
 282#ifndef NO_OPENSSL
 283        if (sock->ssl)
 284                n = SSL_read(sock->ssl, buf, len);
 285        else
 286#endif
 287                n = xread(sock->fd[0], buf, len);
 288        if (n <= 0) {
 289                socket_perror("read", sock, n);
 290                close(sock->fd[0]);
 291                close(sock->fd[1]);
 292                sock->fd[0] = sock->fd[1] = -1;
 293        }
 294        return n;
 295}
 296
 297static int socket_write(struct imap_socket *sock, const char *buf, int len)
 298{
 299        int n;
 300#ifndef NO_OPENSSL
 301        if (sock->ssl)
 302                n = SSL_write(sock->ssl, buf, len);
 303        else
 304#endif
 305                n = write_in_full(sock->fd[1], buf, len);
 306        if (n != len) {
 307                socket_perror("write", sock, n);
 308                close(sock->fd[0]);
 309                close(sock->fd[1]);
 310                sock->fd[0] = sock->fd[1] = -1;
 311        }
 312        return n;
 313}
 314
 315static void socket_shutdown(struct imap_socket *sock)
 316{
 317#ifndef NO_OPENSSL
 318        if (sock->ssl) {
 319                SSL_shutdown(sock->ssl);
 320                SSL_free(sock->ssl);
 321        }
 322#endif
 323        close(sock->fd[0]);
 324        close(sock->fd[1]);
 325}
 326
 327/* simple line buffering */
 328static int buffer_gets(struct imap_buffer *b, char **s)
 329{
 330        int n;
 331        int start = b->offset;
 332
 333        *s = b->buf + start;
 334
 335        for (;;) {
 336                /* make sure we have enough data to read the \r\n sequence */
 337                if (b->offset + 1 >= b->bytes) {
 338                        if (start) {
 339                                /* shift down used bytes */
 340                                *s = b->buf;
 341
 342                                assert(start <= b->bytes);
 343                                n = b->bytes - start;
 344
 345                                if (n)
 346                                        memmove(b->buf, b->buf + start, n);
 347                                b->offset -= start;
 348                                b->bytes = n;
 349                                start = 0;
 350                        }
 351
 352                        n = socket_read(&b->sock, b->buf + b->bytes,
 353                                         sizeof(b->buf) - b->bytes);
 354
 355                        if (n <= 0)
 356                                return -1;
 357
 358                        b->bytes += n;
 359                }
 360
 361                if (b->buf[b->offset] == '\r') {
 362                        assert(b->offset + 1 < b->bytes);
 363                        if (b->buf[b->offset + 1] == '\n') {
 364                                b->buf[b->offset] = 0;  /* terminate the string */
 365                                b->offset += 2; /* next line */
 366                                if (Verbose)
 367                                        puts(*s);
 368                                return 0;
 369                        }
 370                }
 371
 372                b->offset++;
 373        }
 374        /* not reached */
 375}
 376
 377static void imap_info(const char *msg, ...)
 378{
 379        va_list va;
 380
 381        if (!Quiet) {
 382                va_start(va, msg);
 383                vprintf(msg, va);
 384                va_end(va);
 385                fflush(stdout);
 386        }
 387}
 388
 389static void imap_warn(const char *msg, ...)
 390{
 391        va_list va;
 392
 393        if (Quiet < 2) {
 394                va_start(va, msg);
 395                vfprintf(stderr, msg, va);
 396                va_end(va);
 397        }
 398}
 399
 400static char *next_arg(char **s)
 401{
 402        char *ret;
 403
 404        if (!s || !*s)
 405                return NULL;
 406        while (isspace((unsigned char) **s))
 407                (*s)++;
 408        if (!**s) {
 409                *s = NULL;
 410                return NULL;
 411        }
 412        if (**s == '"') {
 413                ++*s;
 414                ret = *s;
 415                *s = strchr(*s, '"');
 416        } else {
 417                ret = *s;
 418                while (**s && !isspace((unsigned char) **s))
 419                        (*s)++;
 420        }
 421        if (*s) {
 422                if (**s)
 423                        *(*s)++ = 0;
 424                if (!**s)
 425                        *s = NULL;
 426        }
 427        return ret;
 428}
 429
 430static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 431{
 432        int ret;
 433        va_list va;
 434
 435        va_start(va, fmt);
 436        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 437                die("Fatal: buffer too small. Please report a bug.");
 438        va_end(va);
 439        return ret;
 440}
 441
 442static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 443                                         struct imap_cmd_cb *cb,
 444                                         const char *fmt, va_list ap)
 445{
 446        struct imap *imap = ctx->imap;
 447        struct imap_cmd *cmd;
 448        int n, bufl;
 449        char buf[1024];
 450
 451        cmd = xmalloc(sizeof(struct imap_cmd));
 452        nfvasprintf(&cmd->cmd, fmt, ap);
 453        cmd->tag = ++imap->nexttag;
 454
 455        if (cb)
 456                cmd->cb = *cb;
 457        else
 458                memset(&cmd->cb, 0, sizeof(cmd->cb));
 459
 460        while (imap->literal_pending)
 461                get_cmd_result(ctx, NULL);
 462
 463        if (!cmd->cb.data)
 464                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 465        else
 466                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 467                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 468                                  CAP(LITERALPLUS) ? "+" : "");
 469
 470        if (Verbose) {
 471                if (imap->num_in_progress)
 472                        printf("(%d in progress) ", imap->num_in_progress);
 473                if (memcmp(cmd->cmd, "LOGIN", 5))
 474                        printf(">>> %s", buf);
 475                else
 476                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 477        }
 478        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 479                free(cmd->cmd);
 480                free(cmd);
 481                if (cb)
 482                        free(cb->data);
 483                return NULL;
 484        }
 485        if (cmd->cb.data) {
 486                if (CAP(LITERALPLUS)) {
 487                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 488                        free(cmd->cb.data);
 489                        if (n != cmd->cb.dlen ||
 490                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 491                                free(cmd->cmd);
 492                                free(cmd);
 493                                return NULL;
 494                        }
 495                        cmd->cb.data = NULL;
 496                } else
 497                        imap->literal_pending = 1;
 498        } else if (cmd->cb.cont)
 499                imap->literal_pending = 1;
 500        cmd->next = NULL;
 501        *imap->in_progress_append = cmd;
 502        imap->in_progress_append = &cmd->next;
 503        imap->num_in_progress++;
 504        return cmd;
 505}
 506
 507__attribute__((format (printf, 3, 4)))
 508static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 509                                       struct imap_cmd_cb *cb,
 510                                       const char *fmt, ...)
 511{
 512        struct imap_cmd *ret;
 513        va_list ap;
 514
 515        va_start(ap, fmt);
 516        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 517        va_end(ap);
 518        return ret;
 519}
 520
 521__attribute__((format (printf, 3, 4)))
 522static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 523                     const char *fmt, ...)
 524{
 525        va_list ap;
 526        struct imap_cmd *cmdp;
 527
 528        va_start(ap, fmt);
 529        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 530        va_end(ap);
 531        if (!cmdp)
 532                return RESP_BAD;
 533
 534        return get_cmd_result(ctx, cmdp);
 535}
 536
 537__attribute__((format (printf, 3, 4)))
 538static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 539                       const char *fmt, ...)
 540{
 541        va_list ap;
 542        struct imap_cmd *cmdp;
 543
 544        va_start(ap, fmt);
 545        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 546        va_end(ap);
 547        if (!cmdp)
 548                return DRV_STORE_BAD;
 549
 550        switch (get_cmd_result(ctx, cmdp)) {
 551        case RESP_BAD: return DRV_STORE_BAD;
 552        case RESP_NO: return DRV_MSG_BAD;
 553        default: return DRV_OK;
 554        }
 555}
 556
 557static int is_atom(struct imap_list *list)
 558{
 559        return list && list->val && list->val != NIL && list->val != LIST;
 560}
 561
 562static int is_list(struct imap_list *list)
 563{
 564        return list && list->val == LIST;
 565}
 566
 567static void free_list(struct imap_list *list)
 568{
 569        struct imap_list *tmp;
 570
 571        for (; list; list = tmp) {
 572                tmp = list->next;
 573                if (is_list(list))
 574                        free_list(list->child);
 575                else if (is_atom(list))
 576                        free(list->val);
 577                free(list);
 578        }
 579}
 580
 581static int parse_imap_list_l(char **sp, struct imap_list **curp, int level)
 582{
 583        struct imap_list *cur;
 584        char *s = *sp, *p;
 585
 586        for (;;) {
 587                while (isspace((unsigned char)*s))
 588                        s++;
 589                if (level && *s == ')') {
 590                        s++;
 591                        break;
 592                }
 593                *curp = cur = xmalloc(sizeof(*cur));
 594                curp = &cur->next;
 595                cur->val = NULL; /* for clean bail */
 596                if (*s == '(') {
 597                        /* sublist */
 598                        s++;
 599                        cur->val = LIST;
 600                        if (parse_imap_list_l(&s, &cur->child, level + 1))
 601                                goto bail;
 602                } else if (*s == '"') {
 603                        /* quoted string */
 604                        s++;
 605                        p = s;
 606                        for (; *s != '"'; s++)
 607                                if (!*s)
 608                                        goto bail;
 609                        cur->len = s - p;
 610                        s++;
 611                        cur->val = xmemdupz(p, cur->len);
 612                } else {
 613                        /* atom */
 614                        p = s;
 615                        for (; *s && !isspace((unsigned char)*s); s++)
 616                                if (level && *s == ')')
 617                                        break;
 618                        cur->len = s - p;
 619                        if (cur->len == 3 && !memcmp("NIL", p, 3))
 620                                cur->val = NIL;
 621                        else
 622                                cur->val = xmemdupz(p, cur->len);
 623                }
 624
 625                if (!level)
 626                        break;
 627                if (!*s)
 628                        goto bail;
 629        }
 630        *sp = s;
 631        *curp = NULL;
 632        return 0;
 633
 634bail:
 635        *curp = NULL;
 636        return -1;
 637}
 638
 639static struct imap_list *parse_list(char **sp)
 640{
 641        struct imap_list *head;
 642
 643        if (!parse_imap_list_l(sp, &head, 0))
 644                return head;
 645        free_list(head);
 646        return NULL;
 647}
 648
 649static void parse_capability(struct imap *imap, char *cmd)
 650{
 651        char *arg;
 652        unsigned i;
 653
 654        imap->caps = 0x80000000;
 655        while ((arg = next_arg(&cmd)))
 656                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 657                        if (!strcmp(cap_list[i], arg))
 658                                imap->caps |= 1 << i;
 659        imap->rcaps = imap->caps;
 660}
 661
 662static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 663                               char *s)
 664{
 665        struct imap *imap = ctx->imap;
 666        char *arg, *p;
 667
 668        if (*s != '[')
 669                return RESP_OK;         /* no response code */
 670        s++;
 671        if (!(p = strchr(s, ']'))) {
 672                fprintf(stderr, "IMAP error: malformed response code\n");
 673                return RESP_BAD;
 674        }
 675        *p++ = 0;
 676        arg = next_arg(&s);
 677        if (!strcmp("UIDVALIDITY", arg)) {
 678                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 679                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 680                        return RESP_BAD;
 681                }
 682        } else if (!strcmp("UIDNEXT", arg)) {
 683                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 684                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 685                        return RESP_BAD;
 686                }
 687        } else if (!strcmp("CAPABILITY", arg)) {
 688                parse_capability(imap, s);
 689        } else if (!strcmp("ALERT", arg)) {
 690                /* RFC2060 says that these messages MUST be displayed
 691                 * to the user
 692                 */
 693                for (; isspace((unsigned char)*p); p++);
 694                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 695        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 696                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 697                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 698                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 699                        return RESP_BAD;
 700                }
 701        }
 702        return RESP_OK;
 703}
 704
 705static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 706{
 707        struct imap *imap = ctx->imap;
 708        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 709        char *cmd, *arg, *arg1, *p;
 710        int n, resp, resp2, tag;
 711
 712        for (;;) {
 713                if (buffer_gets(&imap->buf, &cmd))
 714                        return RESP_BAD;
 715
 716                arg = next_arg(&cmd);
 717                if (*arg == '*') {
 718                        arg = next_arg(&cmd);
 719                        if (!arg) {
 720                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 721                                return RESP_BAD;
 722                        }
 723
 724                        if (!strcmp("NAMESPACE", arg)) {
 725                                imap->ns_personal = parse_list(&cmd);
 726                                imap->ns_other = parse_list(&cmd);
 727                                imap->ns_shared = parse_list(&cmd);
 728                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 729                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 730                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 731                                        return resp;
 732                        } else if (!strcmp("CAPABILITY", arg)) {
 733                                parse_capability(imap, cmd);
 734                        } else if ((arg1 = next_arg(&cmd))) {
 735                                ; /*
 736                                   * Unhandled response-data with at least two words.
 737                                   * Ignore it.
 738                                   *
 739                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 740                                   * and '<num> RECENT' but as a probably-unintended side
 741                                   * effect it ignores other unrecognized two-word
 742                                   * responses.  imap-send doesn't ever try to read
 743                                   * messages or mailboxes these days, so consider
 744                                   * eliminating this case.
 745                                   */
 746                        } else {
 747                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 748                                return RESP_BAD;
 749                        }
 750                } else if (!imap->in_progress) {
 751                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 752                        return RESP_BAD;
 753                } else if (*arg == '+') {
 754                        /* This can happen only with the last command underway, as
 755                           it enforces a round-trip. */
 756                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 757                               offsetof(struct imap_cmd, next));
 758                        if (cmdp->cb.data) {
 759                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 760                                free(cmdp->cb.data);
 761                                cmdp->cb.data = NULL;
 762                                if (n != (int)cmdp->cb.dlen)
 763                                        return RESP_BAD;
 764                        } else if (cmdp->cb.cont) {
 765                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 766                                        return RESP_BAD;
 767                        } else {
 768                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 769                                return RESP_BAD;
 770                        }
 771                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 772                                return RESP_BAD;
 773                        if (!cmdp->cb.cont)
 774                                imap->literal_pending = 0;
 775                        if (!tcmd)
 776                                return DRV_OK;
 777                } else {
 778                        tag = atoi(arg);
 779                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 780                                if (cmdp->tag == tag)
 781                                        goto gottag;
 782                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 783                        return RESP_BAD;
 784                gottag:
 785                        if (!(*pcmdp = cmdp->next))
 786                                imap->in_progress_append = pcmdp;
 787                        imap->num_in_progress--;
 788                        if (cmdp->cb.cont || cmdp->cb.data)
 789                                imap->literal_pending = 0;
 790                        arg = next_arg(&cmd);
 791                        if (!strcmp("OK", arg))
 792                                resp = DRV_OK;
 793                        else {
 794                                if (!strcmp("NO", arg)) {
 795                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 796                                                p = strchr(cmdp->cmd, '"');
 797                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 798                                                        resp = RESP_BAD;
 799                                                        goto normal;
 800                                                }
 801                                                /* not waiting here violates the spec, but a server that does not
 802                                                   grok this nonetheless violates it too. */
 803                                                cmdp->cb.create = 0;
 804                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 805                                                        resp = RESP_BAD;
 806                                                        goto normal;
 807                                                }
 808                                                free(cmdp->cmd);
 809                                                free(cmdp);
 810                                                if (!tcmd)
 811                                                        return 0;       /* ignored */
 812                                                if (cmdp == tcmd)
 813                                                        tcmd = ncmdp;
 814                                                continue;
 815                                        }
 816                                        resp = RESP_NO;
 817                                } else /*if (!strcmp("BAD", arg))*/
 818                                        resp = RESP_BAD;
 819                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 820                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 821                                                        cmdp->cmd : "LOGIN <user> <pass>",
 822                                                        arg, cmd ? cmd : "");
 823                        }
 824                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 825                                resp = resp2;
 826                normal:
 827                        if (cmdp->cb.done)
 828                                cmdp->cb.done(ctx, cmdp, resp);
 829                        free(cmdp->cb.data);
 830                        free(cmdp->cmd);
 831                        free(cmdp);
 832                        if (!tcmd || tcmd == cmdp)
 833                                return resp;
 834                }
 835        }
 836        /* not reached */
 837}
 838
 839static void imap_close_server(struct imap_store *ictx)
 840{
 841        struct imap *imap = ictx->imap;
 842
 843        if (imap->buf.sock.fd[0] != -1) {
 844                imap_exec(ictx, NULL, "LOGOUT");
 845                socket_shutdown(&imap->buf.sock);
 846        }
 847        free_list(imap->ns_personal);
 848        free_list(imap->ns_other);
 849        free_list(imap->ns_shared);
 850        free(imap);
 851}
 852
 853static void imap_close_store(struct store *ctx)
 854{
 855        imap_close_server((struct imap_store *)ctx);
 856        free(ctx);
 857}
 858
 859#ifndef NO_OPENSSL
 860
 861/*
 862 * hexchar() and cram() functions are based on the code from the isync
 863 * project (http://isync.sf.net/).
 864 */
 865static char hexchar(unsigned int b)
 866{
 867        return b < 10 ? '0' + b : 'a' + (b - 10);
 868}
 869
 870#define ENCODED_SIZE(n) (4*((n+2)/3))
 871static char *cram(const char *challenge_64, const char *user, const char *pass)
 872{
 873        int i, resp_len, encoded_len, decoded_len;
 874        HMAC_CTX hmac;
 875        unsigned char hash[16];
 876        char hex[33];
 877        char *response, *response_64, *challenge;
 878
 879        /*
 880         * length of challenge_64 (i.e. base-64 encoded string) is a good
 881         * enough upper bound for challenge (decoded result).
 882         */
 883        encoded_len = strlen(challenge_64);
 884        challenge = xmalloc(encoded_len);
 885        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 886                                      (unsigned char *)challenge_64, encoded_len);
 887        if (decoded_len < 0)
 888                die("invalid challenge %s", challenge_64);
 889        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 890        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 891        HMAC_Final(&hmac, hash, NULL);
 892        HMAC_CTX_cleanup(&hmac);
 893
 894        hex[32] = 0;
 895        for (i = 0; i < 16; i++) {
 896                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 897                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 898        }
 899
 900        /* response: "<user> <digest in hex>" */
 901        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 902        response = xmalloc(resp_len);
 903        sprintf(response, "%s %s", user, hex);
 904
 905        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 906        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 907                                      (unsigned char *)response, resp_len);
 908        if (encoded_len < 0)
 909                die("EVP_EncodeBlock error");
 910        response_64[encoded_len] = '\0';
 911        return (char *)response_64;
 912}
 913
 914#else
 915
 916static char *cram(const char *challenge_64, const char *user, const char *pass)
 917{
 918        die("If you want to use CRAM-MD5 authenticate method, "
 919            "you have to build git-imap-send with OpenSSL library.");
 920}
 921
 922#endif
 923
 924static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 925{
 926        int ret;
 927        char *response;
 928
 929        response = cram(prompt, server.user, server.pass);
 930
 931        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 932        if (ret != strlen(response))
 933                return error("IMAP error: sending response failed");
 934
 935        free(response);
 936
 937        return 0;
 938}
 939
 940static struct store *imap_open_store(struct imap_server_conf *srvc)
 941{
 942        struct imap_store *ctx;
 943        struct imap *imap;
 944        char *arg, *rsp;
 945        int s = -1, preauth;
 946
 947        ctx = xcalloc(sizeof(*ctx), 1);
 948
 949        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 950        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 951        imap->in_progress_append = &imap->in_progress;
 952
 953        /* open connection to IMAP server */
 954
 955        if (srvc->tunnel) {
 956                const char *argv[] = { srvc->tunnel, NULL };
 957                struct child_process tunnel = {NULL};
 958
 959                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 960
 961                tunnel.argv = argv;
 962                tunnel.use_shell = 1;
 963                tunnel.in = -1;
 964                tunnel.out = -1;
 965                if (start_command(&tunnel))
 966                        die("cannot start proxy %s", argv[0]);
 967
 968                imap->buf.sock.fd[0] = tunnel.out;
 969                imap->buf.sock.fd[1] = tunnel.in;
 970
 971                imap_info("ok\n");
 972        } else {
 973#ifndef NO_IPV6
 974                struct addrinfo hints, *ai0, *ai;
 975                int gai;
 976                char portstr[6];
 977
 978                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 979
 980                memset(&hints, 0, sizeof(hints));
 981                hints.ai_socktype = SOCK_STREAM;
 982                hints.ai_protocol = IPPROTO_TCP;
 983
 984                imap_info("Resolving %s... ", srvc->host);
 985                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 986                if (gai) {
 987                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 988                        goto bail;
 989                }
 990                imap_info("ok\n");
 991
 992                for (ai0 = ai; ai; ai = ai->ai_next) {
 993                        char addr[NI_MAXHOST];
 994
 995                        s = socket(ai->ai_family, ai->ai_socktype,
 996                                   ai->ai_protocol);
 997                        if (s < 0)
 998                                continue;
 999
1000                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1001                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1002                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1003
1004                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1005                                close(s);
1006                                s = -1;
1007                                perror("connect");
1008                                continue;
1009                        }
1010
1011                        break;
1012                }
1013                freeaddrinfo(ai0);
1014#else /* NO_IPV6 */
1015                struct hostent *he;
1016                struct sockaddr_in addr;
1017
1018                memset(&addr, 0, sizeof(addr));
1019                addr.sin_port = htons(srvc->port);
1020                addr.sin_family = AF_INET;
1021
1022                imap_info("Resolving %s... ", srvc->host);
1023                he = gethostbyname(srvc->host);
1024                if (!he) {
1025                        perror("gethostbyname");
1026                        goto bail;
1027                }
1028                imap_info("ok\n");
1029
1030                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1031
1032                s = socket(PF_INET, SOCK_STREAM, 0);
1033
1034                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1035                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1036                        close(s);
1037                        s = -1;
1038                        perror("connect");
1039                }
1040#endif
1041                if (s < 0) {
1042                        fputs("Error: unable to connect to server.\n", stderr);
1043                        goto bail;
1044                }
1045
1046                imap->buf.sock.fd[0] = s;
1047                imap->buf.sock.fd[1] = dup(s);
1048
1049                if (srvc->use_ssl &&
1050                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1051                        close(s);
1052                        goto bail;
1053                }
1054                imap_info("ok\n");
1055        }
1056
1057        /* read the greeting string */
1058        if (buffer_gets(&imap->buf, &rsp)) {
1059                fprintf(stderr, "IMAP error: no greeting response\n");
1060                goto bail;
1061        }
1062        arg = next_arg(&rsp);
1063        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1064                fprintf(stderr, "IMAP error: invalid greeting response\n");
1065                goto bail;
1066        }
1067        preauth = 0;
1068        if (!strcmp("PREAUTH", arg))
1069                preauth = 1;
1070        else if (strcmp("OK", arg) != 0) {
1071                fprintf(stderr, "IMAP error: unknown greeting response\n");
1072                goto bail;
1073        }
1074        parse_response_code(ctx, NULL, rsp);
1075        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1076                goto bail;
1077
1078        if (!preauth) {
1079#ifndef NO_OPENSSL
1080                if (!srvc->use_ssl && CAP(STARTTLS)) {
1081                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1082                                goto bail;
1083                        if (ssl_socket_connect(&imap->buf.sock, 1,
1084                                               srvc->ssl_verify))
1085                                goto bail;
1086                        /* capabilities may have changed, so get the new capabilities */
1087                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1088                                goto bail;
1089                }
1090#endif
1091                imap_info("Logging in...\n");
1092                if (!srvc->user) {
1093                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1094                        goto bail;
1095                }
1096                if (!srvc->pass) {
1097                        struct strbuf prompt = STRBUF_INIT;
1098                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1099                        arg = git_getpass(prompt.buf);
1100                        strbuf_release(&prompt);
1101                        if (!*arg) {
1102                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1103                                goto bail;
1104                        }
1105                        /*
1106                         * getpass() returns a pointer to a static buffer.  make a copy
1107                         * for long term storage.
1108                         */
1109                        srvc->pass = xstrdup(arg);
1110                }
1111                if (CAP(NOLOGIN)) {
1112                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1113                        goto bail;
1114                }
1115
1116                if (srvc->auth_method) {
1117                        struct imap_cmd_cb cb;
1118
1119                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1120                                if (!CAP(AUTH_CRAM_MD5)) {
1121                                        fprintf(stderr, "You specified"
1122                                                "CRAM-MD5 as authentication method, "
1123                                                "but %s doesn't support it.\n", srvc->host);
1124                                        goto bail;
1125                                }
1126                                /* CRAM-MD5 */
1127
1128                                memset(&cb, 0, sizeof(cb));
1129                                cb.cont = auth_cram_md5;
1130                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1131                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1132                                        goto bail;
1133                                }
1134                        } else {
1135                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1136                                goto bail;
1137                        }
1138                } else {
1139                        if (!imap->buf.sock.ssl)
1140                                imap_warn("*** IMAP Warning *** Password is being "
1141                                          "sent in the clear\n");
1142                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1143                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1144                                goto bail;
1145                        }
1146                }
1147        } /* !preauth */
1148
1149        ctx->prefix = "";
1150        ctx->trashnc = 1;
1151        return (struct store *)ctx;
1152
1153bail:
1154        imap_close_store(&ctx->gen);
1155        return NULL;
1156}
1157
1158static void lf_to_crlf(struct strbuf *msg)
1159{
1160        size_t new_len;
1161        char *new;
1162        int i, j, lfnum = 0;
1163
1164        if (msg->buf[0] == '\n')
1165                lfnum++;
1166        for (i = 1; i < msg->len; i++) {
1167                if (msg->buf[i - 1] != '\r' && msg->buf[i] == '\n')
1168                        lfnum++;
1169        }
1170
1171        new_len = msg->len + lfnum;
1172        new = xmalloc(new_len + 1);
1173        if (msg->buf[0] == '\n') {
1174                new[0] = '\r';
1175                new[1] = '\n';
1176                i = 1;
1177                j = 2;
1178        } else {
1179                new[0] = msg->buf[0];
1180                i = 1;
1181                j = 1;
1182        }
1183        for ( ; i < msg->len; i++) {
1184                if (msg->buf[i] != '\n') {
1185                        new[j++] = msg->buf[i];
1186                        continue;
1187                }
1188                if (msg->buf[i - 1] != '\r')
1189                        new[j++] = '\r';
1190                /* otherwise it already had CR before */
1191                new[j++] = '\n';
1192        }
1193        strbuf_attach(msg, new, new_len, new_len + 1);
1194}
1195
1196/*
1197 * Store msg to IMAP.  Also detach and free the data from msg->data,
1198 * leaving msg->data empty.
1199 */
1200static int imap_store_msg(struct store *gctx, struct strbuf *msg)
1201{
1202        struct imap_store *ctx = (struct imap_store *)gctx;
1203        struct imap *imap = ctx->imap;
1204        struct imap_cmd_cb cb;
1205        const char *prefix, *box;
1206        int ret;
1207
1208        lf_to_crlf(msg);
1209        memset(&cb, 0, sizeof(cb));
1210
1211        cb.dlen = msg->len;
1212        cb.data = strbuf_detach(msg, NULL);
1213
1214        box = gctx->name;
1215        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1216        cb.create = 0;
1217        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1218        imap->caps = imap->rcaps;
1219        if (ret != DRV_OK)
1220                return ret;
1221
1222        return DRV_OK;
1223}
1224
1225static void wrap_in_html(struct strbuf *msg)
1226{
1227        struct strbuf buf = STRBUF_INIT;
1228        static char *content_type = "Content-Type: text/html;\n";
1229        static char *pre_open = "<pre>\n";
1230        static char *pre_close = "</pre>\n";
1231        const char *body = strstr(msg->buf, "\n\n");
1232
1233        if (!body)
1234                return; /* Headers but no body; no wrapping needed */
1235
1236        body += 2;
1237
1238        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1239        strbuf_addstr(&buf, content_type);
1240        strbuf_addch(&buf, '\n');
1241        strbuf_addstr(&buf, pre_open);
1242        strbuf_addstr_xml_quoted(&buf, body);
1243        strbuf_addstr(&buf, pre_close);
1244
1245        strbuf_release(msg);
1246        *msg = buf;
1247}
1248
1249#define CHUNKSIZE 0x1000
1250
1251static int read_message(FILE *f, struct strbuf *all_msgs)
1252{
1253        do {
1254                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1255                        break;
1256        } while (!feof(f));
1257
1258        return ferror(f) ? -1 : 0;
1259}
1260
1261static int count_messages(struct strbuf *all_msgs)
1262{
1263        int count = 0;
1264        char *p = all_msgs->buf;
1265
1266        while (1) {
1267                if (!prefixcmp(p, "From ")) {
1268                        p = strstr(p+5, "\nFrom: ");
1269                        if (!p) break;
1270                        p = strstr(p+7, "\nDate: ");
1271                        if (!p) break;
1272                        p = strstr(p+7, "\nSubject: ");
1273                        if (!p) break;
1274                        p += 10;
1275                        count++;
1276                }
1277                p = strstr(p+5, "\nFrom ");
1278                if (!p)
1279                        break;
1280                p++;
1281        }
1282        return count;
1283}
1284
1285/*
1286 * Copy the next message from all_msgs, starting at offset *ofs, to
1287 * msg.  Update *ofs to the start of the following message.  Return
1288 * true iff a message was successfully copied.
1289 */
1290static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1291{
1292        char *p, *data;
1293        size_t len;
1294
1295        if (*ofs >= all_msgs->len)
1296                return 0;
1297
1298        data = &all_msgs->buf[*ofs];
1299        len = all_msgs->len - *ofs;
1300
1301        if (len < 5 || prefixcmp(data, "From "))
1302                return 0;
1303
1304        p = strchr(data, '\n');
1305        if (p) {
1306                p++;
1307                len -= p - data;
1308                *ofs += p - data;
1309                data = p;
1310        }
1311
1312        p = strstr(data, "\nFrom ");
1313        if (p)
1314                len = &p[1] - data;
1315
1316        strbuf_add(msg, data, len);
1317        *ofs += len;
1318        return 1;
1319}
1320
1321static char *imap_folder;
1322
1323static int git_imap_config(const char *key, const char *val, void *cb)
1324{
1325        char imap_key[] = "imap.";
1326
1327        if (strncmp(key, imap_key, sizeof imap_key - 1))
1328                return 0;
1329
1330        key += sizeof imap_key - 1;
1331
1332        /* check booleans first, and barf on others */
1333        if (!strcmp("sslverify", key))
1334                server.ssl_verify = git_config_bool(key, val);
1335        else if (!strcmp("preformattedhtml", key))
1336                server.use_html = git_config_bool(key, val);
1337        else if (!val)
1338                return config_error_nonbool(key);
1339
1340        if (!strcmp("folder", key)) {
1341                imap_folder = xstrdup(val);
1342        } else if (!strcmp("host", key)) {
1343                if (!prefixcmp(val, "imap:"))
1344                        val += 5;
1345                else if (!prefixcmp(val, "imaps:")) {
1346                        val += 6;
1347                        server.use_ssl = 1;
1348                }
1349                if (!prefixcmp(val, "//"))
1350                        val += 2;
1351                server.host = xstrdup(val);
1352        } else if (!strcmp("user", key))
1353                server.user = xstrdup(val);
1354        else if (!strcmp("pass", key))
1355                server.pass = xstrdup(val);
1356        else if (!strcmp("port", key))
1357                server.port = git_config_int(key, val);
1358        else if (!strcmp("tunnel", key))
1359                server.tunnel = xstrdup(val);
1360        else if (!strcmp("authmethod", key))
1361                server.auth_method = xstrdup(val);
1362
1363        return 0;
1364}
1365
1366int main(int argc, char **argv)
1367{
1368        struct strbuf all_msgs = STRBUF_INIT;
1369        struct strbuf msg = STRBUF_INIT;
1370        struct store *ctx = NULL;
1371        int ofs = 0;
1372        int r;
1373        int total, n = 0;
1374        int nongit_ok;
1375
1376        git_extract_argv0_path(argv[0]);
1377
1378        git_setup_gettext();
1379
1380        if (argc != 1)
1381                usage(imap_send_usage);
1382
1383        setup_git_directory_gently(&nongit_ok);
1384        git_config(git_imap_config, NULL);
1385
1386        if (!server.port)
1387                server.port = server.use_ssl ? 993 : 143;
1388
1389        if (!imap_folder) {
1390                fprintf(stderr, "no imap store specified\n");
1391                return 1;
1392        }
1393        if (!server.host) {
1394                if (!server.tunnel) {
1395                        fprintf(stderr, "no imap host specified\n");
1396                        return 1;
1397                }
1398                server.host = "tunnel";
1399        }
1400
1401        /* read the messages */
1402        if (read_message(stdin, &all_msgs)) {
1403                fprintf(stderr, "error reading input\n");
1404                return 1;
1405        }
1406
1407        if (all_msgs.len == 0) {
1408                fprintf(stderr, "nothing to send\n");
1409                return 1;
1410        }
1411
1412        total = count_messages(&all_msgs);
1413        if (!total) {
1414                fprintf(stderr, "no messages to send\n");
1415                return 1;
1416        }
1417
1418        /* write it to the imap server */
1419        ctx = imap_open_store(&server);
1420        if (!ctx) {
1421                fprintf(stderr, "failed to open store\n");
1422                return 1;
1423        }
1424
1425        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1426        ctx->name = imap_folder;
1427        while (1) {
1428                unsigned percent = n * 100 / total;
1429
1430                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1431                if (!split_msg(&all_msgs, &msg, &ofs))
1432                        break;
1433                if (server.use_html)
1434                        wrap_in_html(&msg);
1435                r = imap_store_msg(ctx, &msg);
1436                if (r != DRV_OK)
1437                        break;
1438                n++;
1439        }
1440        fprintf(stderr, "\n");
1441
1442        imap_close_store(ctx);
1443
1444        return 0;
1445}