0d1f87a651bae9961f296db42449d0841a0cc1a1
   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(struct imap *imap, char **sp, struct imap_list **curp, int level)
 582{
 583        struct imap_list *cur;
 584        char *s = *sp, *p;
 585        int n, bytes;
 586
 587        for (;;) {
 588                while (isspace((unsigned char)*s))
 589                        s++;
 590                if (level && *s == ')') {
 591                        s++;
 592                        break;
 593                }
 594                *curp = cur = xmalloc(sizeof(*cur));
 595                curp = &cur->next;
 596                cur->val = NULL; /* for clean bail */
 597                if (*s == '(') {
 598                        /* sublist */
 599                        s++;
 600                        cur->val = LIST;
 601                        if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
 602                                goto bail;
 603                } else if (imap && *s == '{') {
 604                        /* literal */
 605                        bytes = cur->len = strtol(s + 1, &s, 10);
 606                        if (*s != '}')
 607                                goto bail;
 608
 609                        s = cur->val = xmalloc(cur->len);
 610
 611                        /* dump whats left over in the input buffer */
 612                        n = imap->buf.bytes - imap->buf.offset;
 613
 614                        if (n > bytes)
 615                                /* the entire message fit in the buffer */
 616                                n = bytes;
 617
 618                        memcpy(s, imap->buf.buf + imap->buf.offset, n);
 619                        s += n;
 620                        bytes -= n;
 621
 622                        /* mark that we used part of the buffer */
 623                        imap->buf.offset += n;
 624
 625                        /* now read the rest of the message */
 626                        while (bytes > 0) {
 627                                if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
 628                                        goto bail;
 629                                s += n;
 630                                bytes -= n;
 631                        }
 632
 633                        if (buffer_gets(&imap->buf, &s))
 634                                goto bail;
 635                } else if (*s == '"') {
 636                        /* quoted string */
 637                        s++;
 638                        p = s;
 639                        for (; *s != '"'; s++)
 640                                if (!*s)
 641                                        goto bail;
 642                        cur->len = s - p;
 643                        s++;
 644                        cur->val = xmemdupz(p, cur->len);
 645                } else {
 646                        /* atom */
 647                        p = s;
 648                        for (; *s && !isspace((unsigned char)*s); s++)
 649                                if (level && *s == ')')
 650                                        break;
 651                        cur->len = s - p;
 652                        if (cur->len == 3 && !memcmp("NIL", p, 3))
 653                                cur->val = NIL;
 654                        else
 655                                cur->val = xmemdupz(p, cur->len);
 656                }
 657
 658                if (!level)
 659                        break;
 660                if (!*s)
 661                        goto bail;
 662        }
 663        *sp = s;
 664        *curp = NULL;
 665        return 0;
 666
 667bail:
 668        *curp = NULL;
 669        return -1;
 670}
 671
 672static struct imap_list *parse_list(char **sp)
 673{
 674        struct imap_list *head;
 675
 676        if (!parse_imap_list_l(NULL, sp, &head, 0))
 677                return head;
 678        free_list(head);
 679        return NULL;
 680}
 681
 682static void parse_capability(struct imap *imap, char *cmd)
 683{
 684        char *arg;
 685        unsigned i;
 686
 687        imap->caps = 0x80000000;
 688        while ((arg = next_arg(&cmd)))
 689                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 690                        if (!strcmp(cap_list[i], arg))
 691                                imap->caps |= 1 << i;
 692        imap->rcaps = imap->caps;
 693}
 694
 695static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 696                               char *s)
 697{
 698        struct imap *imap = ctx->imap;
 699        char *arg, *p;
 700
 701        if (*s != '[')
 702                return RESP_OK;         /* no response code */
 703        s++;
 704        if (!(p = strchr(s, ']'))) {
 705                fprintf(stderr, "IMAP error: malformed response code\n");
 706                return RESP_BAD;
 707        }
 708        *p++ = 0;
 709        arg = next_arg(&s);
 710        if (!strcmp("UIDVALIDITY", arg)) {
 711                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
 712                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 713                        return RESP_BAD;
 714                }
 715        } else if (!strcmp("UIDNEXT", arg)) {
 716                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 717                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 718                        return RESP_BAD;
 719                }
 720        } else if (!strcmp("CAPABILITY", arg)) {
 721                parse_capability(imap, s);
 722        } else if (!strcmp("ALERT", arg)) {
 723                /* RFC2060 says that these messages MUST be displayed
 724                 * to the user
 725                 */
 726                for (; isspace((unsigned char)*p); p++);
 727                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 728        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 729                if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
 730                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 731                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 732                        return RESP_BAD;
 733                }
 734        }
 735        return RESP_OK;
 736}
 737
 738static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 739{
 740        struct imap *imap = ctx->imap;
 741        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 742        char *cmd, *arg, *arg1, *p;
 743        int n, resp, resp2, tag;
 744
 745        for (;;) {
 746                if (buffer_gets(&imap->buf, &cmd))
 747                        return RESP_BAD;
 748
 749                arg = next_arg(&cmd);
 750                if (*arg == '*') {
 751                        arg = next_arg(&cmd);
 752                        if (!arg) {
 753                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 754                                return RESP_BAD;
 755                        }
 756
 757                        if (!strcmp("NAMESPACE", arg)) {
 758                                imap->ns_personal = parse_list(&cmd);
 759                                imap->ns_other = parse_list(&cmd);
 760                                imap->ns_shared = parse_list(&cmd);
 761                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 762                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 763                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 764                                        return resp;
 765                        } else if (!strcmp("CAPABILITY", arg)) {
 766                                parse_capability(imap, cmd);
 767                        } else if ((arg1 = next_arg(&cmd))) {
 768                                ; /*
 769                                   * Unhandled response-data with at least two words.
 770                                   * Ignore it.
 771                                   *
 772                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 773                                   * and '<num> RECENT' but as a probably-unintended side
 774                                   * effect it ignores other unrecognized two-word
 775                                   * responses.  imap-send doesn't ever try to read
 776                                   * messages or mailboxes these days, so consider
 777                                   * eliminating this case.
 778                                   */
 779                        } else {
 780                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 781                                return RESP_BAD;
 782                        }
 783                } else if (!imap->in_progress) {
 784                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 785                        return RESP_BAD;
 786                } else if (*arg == '+') {
 787                        /* This can happen only with the last command underway, as
 788                           it enforces a round-trip. */
 789                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 790                               offsetof(struct imap_cmd, next));
 791                        if (cmdp->cb.data) {
 792                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 793                                free(cmdp->cb.data);
 794                                cmdp->cb.data = NULL;
 795                                if (n != (int)cmdp->cb.dlen)
 796                                        return RESP_BAD;
 797                        } else if (cmdp->cb.cont) {
 798                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 799                                        return RESP_BAD;
 800                        } else {
 801                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 802                                return RESP_BAD;
 803                        }
 804                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 805                                return RESP_BAD;
 806                        if (!cmdp->cb.cont)
 807                                imap->literal_pending = 0;
 808                        if (!tcmd)
 809                                return DRV_OK;
 810                } else {
 811                        tag = atoi(arg);
 812                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 813                                if (cmdp->tag == tag)
 814                                        goto gottag;
 815                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 816                        return RESP_BAD;
 817                gottag:
 818                        if (!(*pcmdp = cmdp->next))
 819                                imap->in_progress_append = pcmdp;
 820                        imap->num_in_progress--;
 821                        if (cmdp->cb.cont || cmdp->cb.data)
 822                                imap->literal_pending = 0;
 823                        arg = next_arg(&cmd);
 824                        if (!strcmp("OK", arg))
 825                                resp = DRV_OK;
 826                        else {
 827                                if (!strcmp("NO", arg)) {
 828                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 829                                                p = strchr(cmdp->cmd, '"');
 830                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 831                                                        resp = RESP_BAD;
 832                                                        goto normal;
 833                                                }
 834                                                /* not waiting here violates the spec, but a server that does not
 835                                                   grok this nonetheless violates it too. */
 836                                                cmdp->cb.create = 0;
 837                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 838                                                        resp = RESP_BAD;
 839                                                        goto normal;
 840                                                }
 841                                                free(cmdp->cmd);
 842                                                free(cmdp);
 843                                                if (!tcmd)
 844                                                        return 0;       /* ignored */
 845                                                if (cmdp == tcmd)
 846                                                        tcmd = ncmdp;
 847                                                continue;
 848                                        }
 849                                        resp = RESP_NO;
 850                                } else /*if (!strcmp("BAD", arg))*/
 851                                        resp = RESP_BAD;
 852                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 853                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 854                                                        cmdp->cmd : "LOGIN <user> <pass>",
 855                                                        arg, cmd ? cmd : "");
 856                        }
 857                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 858                                resp = resp2;
 859                normal:
 860                        if (cmdp->cb.done)
 861                                cmdp->cb.done(ctx, cmdp, resp);
 862                        free(cmdp->cb.data);
 863                        free(cmdp->cmd);
 864                        free(cmdp);
 865                        if (!tcmd || tcmd == cmdp)
 866                                return resp;
 867                }
 868        }
 869        /* not reached */
 870}
 871
 872static void imap_close_server(struct imap_store *ictx)
 873{
 874        struct imap *imap = ictx->imap;
 875
 876        if (imap->buf.sock.fd[0] != -1) {
 877                imap_exec(ictx, NULL, "LOGOUT");
 878                socket_shutdown(&imap->buf.sock);
 879        }
 880        free_list(imap->ns_personal);
 881        free_list(imap->ns_other);
 882        free_list(imap->ns_shared);
 883        free(imap);
 884}
 885
 886static void imap_close_store(struct store *ctx)
 887{
 888        imap_close_server((struct imap_store *)ctx);
 889        free(ctx);
 890}
 891
 892#ifndef NO_OPENSSL
 893
 894/*
 895 * hexchar() and cram() functions are based on the code from the isync
 896 * project (http://isync.sf.net/).
 897 */
 898static char hexchar(unsigned int b)
 899{
 900        return b < 10 ? '0' + b : 'a' + (b - 10);
 901}
 902
 903#define ENCODED_SIZE(n) (4*((n+2)/3))
 904static char *cram(const char *challenge_64, const char *user, const char *pass)
 905{
 906        int i, resp_len, encoded_len, decoded_len;
 907        HMAC_CTX hmac;
 908        unsigned char hash[16];
 909        char hex[33];
 910        char *response, *response_64, *challenge;
 911
 912        /*
 913         * length of challenge_64 (i.e. base-64 encoded string) is a good
 914         * enough upper bound for challenge (decoded result).
 915         */
 916        encoded_len = strlen(challenge_64);
 917        challenge = xmalloc(encoded_len);
 918        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 919                                      (unsigned char *)challenge_64, encoded_len);
 920        if (decoded_len < 0)
 921                die("invalid challenge %s", challenge_64);
 922        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 923        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 924        HMAC_Final(&hmac, hash, NULL);
 925        HMAC_CTX_cleanup(&hmac);
 926
 927        hex[32] = 0;
 928        for (i = 0; i < 16; i++) {
 929                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 930                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 931        }
 932
 933        /* response: "<user> <digest in hex>" */
 934        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 935        response = xmalloc(resp_len);
 936        sprintf(response, "%s %s", user, hex);
 937
 938        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 939        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 940                                      (unsigned char *)response, resp_len);
 941        if (encoded_len < 0)
 942                die("EVP_EncodeBlock error");
 943        response_64[encoded_len] = '\0';
 944        return (char *)response_64;
 945}
 946
 947#else
 948
 949static char *cram(const char *challenge_64, const char *user, const char *pass)
 950{
 951        die("If you want to use CRAM-MD5 authenticate method, "
 952            "you have to build git-imap-send with OpenSSL library.");
 953}
 954
 955#endif
 956
 957static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 958{
 959        int ret;
 960        char *response;
 961
 962        response = cram(prompt, server.user, server.pass);
 963
 964        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 965        if (ret != strlen(response))
 966                return error("IMAP error: sending response failed");
 967
 968        free(response);
 969
 970        return 0;
 971}
 972
 973static struct store *imap_open_store(struct imap_server_conf *srvc)
 974{
 975        struct imap_store *ctx;
 976        struct imap *imap;
 977        char *arg, *rsp;
 978        int s = -1, preauth;
 979
 980        ctx = xcalloc(sizeof(*ctx), 1);
 981
 982        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 983        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 984        imap->in_progress_append = &imap->in_progress;
 985
 986        /* open connection to IMAP server */
 987
 988        if (srvc->tunnel) {
 989                const char *argv[] = { srvc->tunnel, NULL };
 990                struct child_process tunnel = {NULL};
 991
 992                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 993
 994                tunnel.argv = argv;
 995                tunnel.use_shell = 1;
 996                tunnel.in = -1;
 997                tunnel.out = -1;
 998                if (start_command(&tunnel))
 999                        die("cannot start proxy %s", argv[0]);
1000
1001                imap->buf.sock.fd[0] = tunnel.out;
1002                imap->buf.sock.fd[1] = tunnel.in;
1003
1004                imap_info("ok\n");
1005        } else {
1006#ifndef NO_IPV6
1007                struct addrinfo hints, *ai0, *ai;
1008                int gai;
1009                char portstr[6];
1010
1011                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
1012
1013                memset(&hints, 0, sizeof(hints));
1014                hints.ai_socktype = SOCK_STREAM;
1015                hints.ai_protocol = IPPROTO_TCP;
1016
1017                imap_info("Resolving %s... ", srvc->host);
1018                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
1019                if (gai) {
1020                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
1021                        goto bail;
1022                }
1023                imap_info("ok\n");
1024
1025                for (ai0 = ai; ai; ai = ai->ai_next) {
1026                        char addr[NI_MAXHOST];
1027
1028                        s = socket(ai->ai_family, ai->ai_socktype,
1029                                   ai->ai_protocol);
1030                        if (s < 0)
1031                                continue;
1032
1033                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1034                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1035                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1036
1037                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1038                                close(s);
1039                                s = -1;
1040                                perror("connect");
1041                                continue;
1042                        }
1043
1044                        break;
1045                }
1046                freeaddrinfo(ai0);
1047#else /* NO_IPV6 */
1048                struct hostent *he;
1049                struct sockaddr_in addr;
1050
1051                memset(&addr, 0, sizeof(addr));
1052                addr.sin_port = htons(srvc->port);
1053                addr.sin_family = AF_INET;
1054
1055                imap_info("Resolving %s... ", srvc->host);
1056                he = gethostbyname(srvc->host);
1057                if (!he) {
1058                        perror("gethostbyname");
1059                        goto bail;
1060                }
1061                imap_info("ok\n");
1062
1063                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1064
1065                s = socket(PF_INET, SOCK_STREAM, 0);
1066
1067                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1068                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1069                        close(s);
1070                        s = -1;
1071                        perror("connect");
1072                }
1073#endif
1074                if (s < 0) {
1075                        fputs("Error: unable to connect to server.\n", stderr);
1076                        goto bail;
1077                }
1078
1079                imap->buf.sock.fd[0] = s;
1080                imap->buf.sock.fd[1] = dup(s);
1081
1082                if (srvc->use_ssl &&
1083                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1084                        close(s);
1085                        goto bail;
1086                }
1087                imap_info("ok\n");
1088        }
1089
1090        /* read the greeting string */
1091        if (buffer_gets(&imap->buf, &rsp)) {
1092                fprintf(stderr, "IMAP error: no greeting response\n");
1093                goto bail;
1094        }
1095        arg = next_arg(&rsp);
1096        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1097                fprintf(stderr, "IMAP error: invalid greeting response\n");
1098                goto bail;
1099        }
1100        preauth = 0;
1101        if (!strcmp("PREAUTH", arg))
1102                preauth = 1;
1103        else if (strcmp("OK", arg) != 0) {
1104                fprintf(stderr, "IMAP error: unknown greeting response\n");
1105                goto bail;
1106        }
1107        parse_response_code(ctx, NULL, rsp);
1108        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1109                goto bail;
1110
1111        if (!preauth) {
1112#ifndef NO_OPENSSL
1113                if (!srvc->use_ssl && CAP(STARTTLS)) {
1114                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1115                                goto bail;
1116                        if (ssl_socket_connect(&imap->buf.sock, 1,
1117                                               srvc->ssl_verify))
1118                                goto bail;
1119                        /* capabilities may have changed, so get the new capabilities */
1120                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1121                                goto bail;
1122                }
1123#endif
1124                imap_info("Logging in...\n");
1125                if (!srvc->user) {
1126                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1127                        goto bail;
1128                }
1129                if (!srvc->pass) {
1130                        struct strbuf prompt = STRBUF_INIT;
1131                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1132                        arg = git_getpass(prompt.buf);
1133                        strbuf_release(&prompt);
1134                        if (!*arg) {
1135                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1136                                goto bail;
1137                        }
1138                        /*
1139                         * getpass() returns a pointer to a static buffer.  make a copy
1140                         * for long term storage.
1141                         */
1142                        srvc->pass = xstrdup(arg);
1143                }
1144                if (CAP(NOLOGIN)) {
1145                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1146                        goto bail;
1147                }
1148
1149                if (srvc->auth_method) {
1150                        struct imap_cmd_cb cb;
1151
1152                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1153                                if (!CAP(AUTH_CRAM_MD5)) {
1154                                        fprintf(stderr, "You specified"
1155                                                "CRAM-MD5 as authentication method, "
1156                                                "but %s doesn't support it.\n", srvc->host);
1157                                        goto bail;
1158                                }
1159                                /* CRAM-MD5 */
1160
1161                                memset(&cb, 0, sizeof(cb));
1162                                cb.cont = auth_cram_md5;
1163                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1164                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1165                                        goto bail;
1166                                }
1167                        } else {
1168                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1169                                goto bail;
1170                        }
1171                } else {
1172                        if (!imap->buf.sock.ssl)
1173                                imap_warn("*** IMAP Warning *** Password is being "
1174                                          "sent in the clear\n");
1175                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1176                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1177                                goto bail;
1178                        }
1179                }
1180        } /* !preauth */
1181
1182        ctx->prefix = "";
1183        ctx->trashnc = 1;
1184        return (struct store *)ctx;
1185
1186bail:
1187        imap_close_store(&ctx->gen);
1188        return NULL;
1189}
1190
1191static void lf_to_crlf(struct strbuf *msg)
1192{
1193        size_t new_len;
1194        char *new;
1195        int i, j, lfnum = 0;
1196
1197        if (msg->buf[0] == '\n')
1198                lfnum++;
1199        for (i = 1; i < msg->len; i++) {
1200                if (msg->buf[i - 1] != '\r' && msg->buf[i] == '\n')
1201                        lfnum++;
1202        }
1203
1204        new_len = msg->len + lfnum;
1205        new = xmalloc(new_len + 1);
1206        if (msg->buf[0] == '\n') {
1207                new[0] = '\r';
1208                new[1] = '\n';
1209                i = 1;
1210                j = 2;
1211        } else {
1212                new[0] = msg->buf[0];
1213                i = 1;
1214                j = 1;
1215        }
1216        for ( ; i < msg->len; i++) {
1217                if (msg->buf[i] != '\n') {
1218                        new[j++] = msg->buf[i];
1219                        continue;
1220                }
1221                if (msg->buf[i - 1] != '\r')
1222                        new[j++] = '\r';
1223                /* otherwise it already had CR before */
1224                new[j++] = '\n';
1225        }
1226        strbuf_attach(msg, new, new_len, new_len + 1);
1227}
1228
1229/*
1230 * Store msg to IMAP.  Also detach and free the data from msg->data,
1231 * leaving msg->data empty.
1232 */
1233static int imap_store_msg(struct store *gctx, struct strbuf *msg)
1234{
1235        struct imap_store *ctx = (struct imap_store *)gctx;
1236        struct imap *imap = ctx->imap;
1237        struct imap_cmd_cb cb;
1238        const char *prefix, *box;
1239        int ret;
1240
1241        lf_to_crlf(msg);
1242        memset(&cb, 0, sizeof(cb));
1243
1244        cb.dlen = msg->len;
1245        cb.data = strbuf_detach(msg, NULL);
1246
1247        box = gctx->name;
1248        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1249        cb.create = 0;
1250        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1251        imap->caps = imap->rcaps;
1252        if (ret != DRV_OK)
1253                return ret;
1254
1255        return DRV_OK;
1256}
1257
1258static void wrap_in_html(struct strbuf *msg)
1259{
1260        struct strbuf buf = STRBUF_INIT;
1261        static char *content_type = "Content-Type: text/html;\n";
1262        static char *pre_open = "<pre>\n";
1263        static char *pre_close = "</pre>\n";
1264        const char *body = strstr(msg->buf, "\n\n");
1265
1266        if (!body)
1267                return; /* Headers but no body; no wrapping needed */
1268
1269        body += 2;
1270
1271        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1272        strbuf_addstr(&buf, content_type);
1273        strbuf_addch(&buf, '\n');
1274        strbuf_addstr(&buf, pre_open);
1275        strbuf_addstr_xml_quoted(&buf, body);
1276        strbuf_addstr(&buf, pre_close);
1277
1278        strbuf_release(msg);
1279        *msg = buf;
1280}
1281
1282#define CHUNKSIZE 0x1000
1283
1284static int read_message(FILE *f, struct strbuf *all_msgs)
1285{
1286        do {
1287                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1288                        break;
1289        } while (!feof(f));
1290
1291        return ferror(f) ? -1 : 0;
1292}
1293
1294static int count_messages(struct strbuf *all_msgs)
1295{
1296        int count = 0;
1297        char *p = all_msgs->buf;
1298
1299        while (1) {
1300                if (!prefixcmp(p, "From ")) {
1301                        p = strstr(p+5, "\nFrom: ");
1302                        if (!p) break;
1303                        p = strstr(p+7, "\nDate: ");
1304                        if (!p) break;
1305                        p = strstr(p+7, "\nSubject: ");
1306                        if (!p) break;
1307                        p += 10;
1308                        count++;
1309                }
1310                p = strstr(p+5, "\nFrom ");
1311                if (!p)
1312                        break;
1313                p++;
1314        }
1315        return count;
1316}
1317
1318/*
1319 * Copy the next message from all_msgs, starting at offset *ofs, to
1320 * msg.  Update *ofs to the start of the following message.  Return
1321 * true iff a message was successfully copied.
1322 */
1323static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1324{
1325        char *p, *data;
1326        size_t len;
1327
1328        if (*ofs >= all_msgs->len)
1329                return 0;
1330
1331        data = &all_msgs->buf[*ofs];
1332        len = all_msgs->len - *ofs;
1333
1334        if (len < 5 || prefixcmp(data, "From "))
1335                return 0;
1336
1337        p = strchr(data, '\n');
1338        if (p) {
1339                p++;
1340                len -= p - data;
1341                *ofs += p - data;
1342                data = p;
1343        }
1344
1345        p = strstr(data, "\nFrom ");
1346        if (p)
1347                len = &p[1] - data;
1348
1349        strbuf_add(msg, data, len);
1350        *ofs += len;
1351        return 1;
1352}
1353
1354static char *imap_folder;
1355
1356static int git_imap_config(const char *key, const char *val, void *cb)
1357{
1358        char imap_key[] = "imap.";
1359
1360        if (strncmp(key, imap_key, sizeof imap_key - 1))
1361                return 0;
1362
1363        key += sizeof imap_key - 1;
1364
1365        /* check booleans first, and barf on others */
1366        if (!strcmp("sslverify", key))
1367                server.ssl_verify = git_config_bool(key, val);
1368        else if (!strcmp("preformattedhtml", key))
1369                server.use_html = git_config_bool(key, val);
1370        else if (!val)
1371                return config_error_nonbool(key);
1372
1373        if (!strcmp("folder", key)) {
1374                imap_folder = xstrdup(val);
1375        } else if (!strcmp("host", key)) {
1376                if (!prefixcmp(val, "imap:"))
1377                        val += 5;
1378                else if (!prefixcmp(val, "imaps:")) {
1379                        val += 6;
1380                        server.use_ssl = 1;
1381                }
1382                if (!prefixcmp(val, "//"))
1383                        val += 2;
1384                server.host = xstrdup(val);
1385        } else if (!strcmp("user", key))
1386                server.user = xstrdup(val);
1387        else if (!strcmp("pass", key))
1388                server.pass = xstrdup(val);
1389        else if (!strcmp("port", key))
1390                server.port = git_config_int(key, val);
1391        else if (!strcmp("tunnel", key))
1392                server.tunnel = xstrdup(val);
1393        else if (!strcmp("authmethod", key))
1394                server.auth_method = xstrdup(val);
1395
1396        return 0;
1397}
1398
1399int main(int argc, char **argv)
1400{
1401        struct strbuf all_msgs = STRBUF_INIT;
1402        struct strbuf msg = STRBUF_INIT;
1403        struct store *ctx = NULL;
1404        int ofs = 0;
1405        int r;
1406        int total, n = 0;
1407        int nongit_ok;
1408
1409        git_extract_argv0_path(argv[0]);
1410
1411        git_setup_gettext();
1412
1413        if (argc != 1)
1414                usage(imap_send_usage);
1415
1416        setup_git_directory_gently(&nongit_ok);
1417        git_config(git_imap_config, NULL);
1418
1419        if (!server.port)
1420                server.port = server.use_ssl ? 993 : 143;
1421
1422        if (!imap_folder) {
1423                fprintf(stderr, "no imap store specified\n");
1424                return 1;
1425        }
1426        if (!server.host) {
1427                if (!server.tunnel) {
1428                        fprintf(stderr, "no imap host specified\n");
1429                        return 1;
1430                }
1431                server.host = "tunnel";
1432        }
1433
1434        /* read the messages */
1435        if (read_message(stdin, &all_msgs)) {
1436                fprintf(stderr, "error reading input\n");
1437                return 1;
1438        }
1439
1440        if (all_msgs.len == 0) {
1441                fprintf(stderr, "nothing to send\n");
1442                return 1;
1443        }
1444
1445        total = count_messages(&all_msgs);
1446        if (!total) {
1447                fprintf(stderr, "no messages to send\n");
1448                return 1;
1449        }
1450
1451        /* write it to the imap server */
1452        ctx = imap_open_store(&server);
1453        if (!ctx) {
1454                fprintf(stderr, "failed to open store\n");
1455                return 1;
1456        }
1457
1458        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1459        ctx->name = imap_folder;
1460        while (1) {
1461                unsigned percent = n * 100 / total;
1462
1463                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1464                if (!split_msg(&all_msgs, &msg, &ofs))
1465                        break;
1466                if (server.use_html)
1467                        wrap_in_html(&msg);
1468                r = imap_store_msg(ctx, &msg);
1469                if (r != DRV_OK)
1470                        break;
1471                n++;
1472        }
1473        fprintf(stderr, "\n");
1474
1475        imap_close_store(ctx);
1476
1477        return 0;
1478}