Andrew's git / gitweb.git / imap-send.c
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imap-send.con commit completion: add hack to enable file mode in bash < 4 (3ffa4df)
   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#include <openssl/x509v3.h>
  35#endif
  36
  37static const char imap_send_usage[] = "git imap-send < <mbox>";
  38
  39#undef DRV_OK
  40#define DRV_OK          0
  41#define DRV_MSG_BAD     -1
  42#define DRV_BOX_BAD     -2
  43#define DRV_STORE_BAD   -3
  44
  45static int Verbose, Quiet;
  46
  47__attribute__((format (printf, 1, 2)))
  48static void imap_info(const char *, ...);
  49__attribute__((format (printf, 1, 2)))
  50static void imap_warn(const char *, ...);
  51
  52static char *next_arg(char **);
  53
  54__attribute__((format (printf, 3, 4)))
  55static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
  56
  57static int nfvasprintf(char **strp, const char *fmt, va_list ap)
  58{
  59        int len;
  60        char tmp[8192];
  61
  62        len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
  63        if (len < 0)
  64                die("Fatal: Out of memory");
  65        if (len >= sizeof(tmp))
  66                die("imap command overflow!");
  67        *strp = xmemdupz(tmp, len);
  68        return len;
  69}
  70
  71struct imap_server_conf {
  72        char *name;
  73        char *tunnel;
  74        char *host;
  75        int port;
  76        char *user;
  77        char *pass;
  78        int use_ssl;
  79        int ssl_verify;
  80        int use_html;
  81        char *auth_method;
  82};
  83
  84static struct imap_server_conf server = {
  85        NULL,   /* name */
  86        NULL,   /* tunnel */
  87        NULL,   /* host */
  88        0,      /* port */
  89        NULL,   /* user */
  90        NULL,   /* pass */
  91        0,      /* use_ssl */
  92        1,      /* ssl_verify */
  93        0,      /* use_html */
  94        NULL,   /* auth_method */
  95};
  96
  97struct imap_socket {
  98        int fd[2];
  99        SSL *ssl;
 100};
 101
 102struct imap_buffer {
 103        struct imap_socket sock;
 104        int bytes;
 105        int offset;
 106        char buf[1024];
 107};
 108
 109struct imap_cmd;
 110
 111struct imap {
 112        int uidnext; /* from SELECT responses */
 113        unsigned caps, rcaps; /* CAPABILITY results */
 114        /* command queue */
 115        int nexttag, num_in_progress, literal_pending;
 116        struct imap_cmd *in_progress, **in_progress_append;
 117        struct imap_buffer buf; /* this is BIG, so put it last */
 118};
 119
 120struct imap_store {
 121        /* currently open mailbox */
 122        const char *name; /* foreign! maybe preset? */
 123        int uidvalidity;
 124        struct imap *imap;
 125        const char *prefix;
 126};
 127
 128struct imap_cmd_cb {
 129        int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
 130        void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
 131        void *ctx;
 132        char *data;
 133        int dlen;
 134        int uid;
 135        unsigned create:1, trycreate:1;
 136};
 137
 138struct imap_cmd {
 139        struct imap_cmd *next;
 140        struct imap_cmd_cb cb;
 141        char *cmd;
 142        int tag;
 143};
 144
 145#define CAP(cap) (imap->caps & (1 << (cap)))
 146
 147enum CAPABILITY {
 148        NOLOGIN = 0,
 149        UIDPLUS,
 150        LITERALPLUS,
 151        NAMESPACE,
 152        STARTTLS,
 153        AUTH_CRAM_MD5
 154};
 155
 156static const char *cap_list[] = {
 157        "LOGINDISABLED",
 158        "UIDPLUS",
 159        "LITERAL+",
 160        "NAMESPACE",
 161        "STARTTLS",
 162        "AUTH=CRAM-MD5",
 163};
 164
 165#define RESP_OK    0
 166#define RESP_NO    1
 167#define RESP_BAD   2
 168
 169static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
 170
 171
 172#ifndef NO_OPENSSL
 173static void ssl_socket_perror(const char *func)
 174{
 175        fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
 176}
 177#endif
 178
 179static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 180{
 181#ifndef NO_OPENSSL
 182        if (sock->ssl) {
 183                int sslerr = SSL_get_error(sock->ssl, ret);
 184                switch (sslerr) {
 185                case SSL_ERROR_NONE:
 186                        break;
 187                case SSL_ERROR_SYSCALL:
 188                        perror("SSL_connect");
 189                        break;
 190                default:
 191                        ssl_socket_perror("SSL_connect");
 192                        break;
 193                }
 194        } else
 195#endif
 196        {
 197                if (ret < 0)
 198                        perror(func);
 199                else
 200                        fprintf(stderr, "%s: unexpected EOF\n", func);
 201        }
 202}
 203
 204#ifdef NO_OPENSSL
 205static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 206{
 207        fprintf(stderr, "SSL requested but SSL support not compiled in\n");
 208        return -1;
 209}
 210
 211#else
 212
 213static int host_matches(const char *host, const char *pattern)
 214{
 215        if (pattern[0] == '*' && pattern[1] == '.') {
 216                pattern += 2;
 217                if (!(host = strchr(host, '.')))
 218                        return 0;
 219                host++;
 220        }
 221
 222        return *host && *pattern && !strcasecmp(host, pattern);
 223}
 224
 225static int verify_hostname(X509 *cert, const char *hostname)
 226{
 227        int len;
 228        X509_NAME *subj;
 229        char cname[1000];
 230        int i, found;
 231        STACK_OF(GENERAL_NAME) *subj_alt_names;
 232
 233        /* try the DNS subjectAltNames */
 234        found = 0;
 235        if ((subj_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL))) {
 236                int num_subj_alt_names = sk_GENERAL_NAME_num(subj_alt_names);
 237                for (i = 0; !found && i < num_subj_alt_names; i++) {
 238                        GENERAL_NAME *subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i);
 239                        if (subj_alt_name->type == GEN_DNS &&
 240                            strlen((const char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length &&
 241                            host_matches(hostname, (const char *)(subj_alt_name->d.ia5->data)))
 242                                found = 1;
 243                }
 244                sk_GENERAL_NAME_pop_free(subj_alt_names, GENERAL_NAME_free);
 245        }
 246        if (found)
 247                return 0;
 248
 249        /* try the common name */
 250        if (!(subj = X509_get_subject_name(cert)))
 251                return error("cannot get certificate subject");
 252        if ((len = X509_NAME_get_text_by_NID(subj, NID_commonName, cname, sizeof(cname))) < 0)
 253                return error("cannot get certificate common name");
 254        if (strlen(cname) == (size_t)len && host_matches(hostname, cname))
 255                return 0;
 256        return error("certificate owner '%s' does not match hostname '%s'",
 257                     cname, hostname);
 258}
 259
 260static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
 261{
 262#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
 263        const SSL_METHOD *meth;
 264#else
 265        SSL_METHOD *meth;
 266#endif
 267        SSL_CTX *ctx;
 268        int ret;
 269        X509 *cert;
 270
 271        SSL_library_init();
 272        SSL_load_error_strings();
 273
 274        if (use_tls_only)
 275                meth = TLSv1_method();
 276        else
 277                meth = SSLv23_method();
 278
 279        if (!meth) {
 280                ssl_socket_perror("SSLv23_method");
 281                return -1;
 282        }
 283
 284        ctx = SSL_CTX_new(meth);
 285
 286        if (verify)
 287                SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
 288
 289        if (!SSL_CTX_set_default_verify_paths(ctx)) {
 290                ssl_socket_perror("SSL_CTX_set_default_verify_paths");
 291                return -1;
 292        }
 293        sock->ssl = SSL_new(ctx);
 294        if (!sock->ssl) {
 295                ssl_socket_perror("SSL_new");
 296                return -1;
 297        }
 298        if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
 299                ssl_socket_perror("SSL_set_rfd");
 300                return -1;
 301        }
 302        if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
 303                ssl_socket_perror("SSL_set_wfd");
 304                return -1;
 305        }
 306
 307#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 308        /*
 309         * SNI (RFC4366)
 310         * OpenSSL does not document this function, but the implementation
 311         * returns 1 on success, 0 on failure after calling SSLerr().
 312         */
 313        ret = SSL_set_tlsext_host_name(sock->ssl, server.host);
 314        if (ret != 1)
 315                warning("SSL_set_tlsext_host_name(%s) failed.", server.host);
 316#endif
 317
 318        ret = SSL_connect(sock->ssl);
 319        if (ret <= 0) {
 320                socket_perror("SSL_connect", sock, ret);
 321                return -1;
 322        }
 323
 324        if (verify) {
 325                /* make sure the hostname matches that of the certificate */
 326                cert = SSL_get_peer_certificate(sock->ssl);
 327                if (!cert)
 328                        return error("unable to get peer certificate.");
 329                if (verify_hostname(cert, server.host) < 0)
 330                        return -1;
 331        }
 332
 333        return 0;
 334}
 335#endif
 336
 337static int socket_read(struct imap_socket *sock, char *buf, int len)
 338{
 339        ssize_t n;
 340#ifndef NO_OPENSSL
 341        if (sock->ssl)
 342                n = SSL_read(sock->ssl, buf, len);
 343        else
 344#endif
 345                n = xread(sock->fd[0], buf, len);
 346        if (n <= 0) {
 347                socket_perror("read", sock, n);
 348                close(sock->fd[0]);
 349                close(sock->fd[1]);
 350                sock->fd[0] = sock->fd[1] = -1;
 351        }
 352        return n;
 353}
 354
 355static int socket_write(struct imap_socket *sock, const char *buf, int len)
 356{
 357        int n;
 358#ifndef NO_OPENSSL
 359        if (sock->ssl)
 360                n = SSL_write(sock->ssl, buf, len);
 361        else
 362#endif
 363                n = write_in_full(sock->fd[1], buf, len);
 364        if (n != len) {
 365                socket_perror("write", sock, n);
 366                close(sock->fd[0]);
 367                close(sock->fd[1]);
 368                sock->fd[0] = sock->fd[1] = -1;
 369        }
 370        return n;
 371}
 372
 373static void socket_shutdown(struct imap_socket *sock)
 374{
 375#ifndef NO_OPENSSL
 376        if (sock->ssl) {
 377                SSL_shutdown(sock->ssl);
 378                SSL_free(sock->ssl);
 379        }
 380#endif
 381        close(sock->fd[0]);
 382        close(sock->fd[1]);
 383}
 384
 385/* simple line buffering */
 386static int buffer_gets(struct imap_buffer *b, char **s)
 387{
 388        int n;
 389        int start = b->offset;
 390
 391        *s = b->buf + start;
 392
 393        for (;;) {
 394                /* make sure we have enough data to read the \r\n sequence */
 395                if (b->offset + 1 >= b->bytes) {
 396                        if (start) {
 397                                /* shift down used bytes */
 398                                *s = b->buf;
 399
 400                                assert(start <= b->bytes);
 401                                n = b->bytes - start;
 402
 403                                if (n)
 404                                        memmove(b->buf, b->buf + start, n);
 405                                b->offset -= start;
 406                                b->bytes = n;
 407                                start = 0;
 408                        }
 409
 410                        n = socket_read(&b->sock, b->buf + b->bytes,
 411                                         sizeof(b->buf) - b->bytes);
 412
 413                        if (n <= 0)
 414                                return -1;
 415
 416                        b->bytes += n;
 417                }
 418
 419                if (b->buf[b->offset] == '\r') {
 420                        assert(b->offset + 1 < b->bytes);
 421                        if (b->buf[b->offset + 1] == '\n') {
 422                                b->buf[b->offset] = 0;  /* terminate the string */
 423                                b->offset += 2; /* next line */
 424                                if (Verbose)
 425                                        puts(*s);
 426                                return 0;
 427                        }
 428                }
 429
 430                b->offset++;
 431        }
 432        /* not reached */
 433}
 434
 435static void imap_info(const char *msg, ...)
 436{
 437        va_list va;
 438
 439        if (!Quiet) {
 440                va_start(va, msg);
 441                vprintf(msg, va);
 442                va_end(va);
 443                fflush(stdout);
 444        }
 445}
 446
 447static void imap_warn(const char *msg, ...)
 448{
 449        va_list va;
 450
 451        if (Quiet < 2) {
 452                va_start(va, msg);
 453                vfprintf(stderr, msg, va);
 454                va_end(va);
 455        }
 456}
 457
 458static char *next_arg(char **s)
 459{
 460        char *ret;
 461
 462        if (!s || !*s)
 463                return NULL;
 464        while (isspace((unsigned char) **s))
 465                (*s)++;
 466        if (!**s) {
 467                *s = NULL;
 468                return NULL;
 469        }
 470        if (**s == '"') {
 471                ++*s;
 472                ret = *s;
 473                *s = strchr(*s, '"');
 474        } else {
 475                ret = *s;
 476                while (**s && !isspace((unsigned char) **s))
 477                        (*s)++;
 478        }
 479        if (*s) {
 480                if (**s)
 481                        *(*s)++ = 0;
 482                if (!**s)
 483                        *s = NULL;
 484        }
 485        return ret;
 486}
 487
 488static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 489{
 490        int ret;
 491        va_list va;
 492
 493        va_start(va, fmt);
 494        if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
 495                die("Fatal: buffer too small. Please report a bug.");
 496        va_end(va);
 497        return ret;
 498}
 499
 500static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 501                                         struct imap_cmd_cb *cb,
 502                                         const char *fmt, va_list ap)
 503{
 504        struct imap *imap = ctx->imap;
 505        struct imap_cmd *cmd;
 506        int n, bufl;
 507        char buf[1024];
 508
 509        cmd = xmalloc(sizeof(struct imap_cmd));
 510        nfvasprintf(&cmd->cmd, fmt, ap);
 511        cmd->tag = ++imap->nexttag;
 512
 513        if (cb)
 514                cmd->cb = *cb;
 515        else
 516                memset(&cmd->cb, 0, sizeof(cmd->cb));
 517
 518        while (imap->literal_pending)
 519                get_cmd_result(ctx, NULL);
 520
 521        if (!cmd->cb.data)
 522                bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
 523        else
 524                bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
 525                                  cmd->tag, cmd->cmd, cmd->cb.dlen,
 526                                  CAP(LITERALPLUS) ? "+" : "");
 527
 528        if (Verbose) {
 529                if (imap->num_in_progress)
 530                        printf("(%d in progress) ", imap->num_in_progress);
 531                if (memcmp(cmd->cmd, "LOGIN", 5))
 532                        printf(">>> %s", buf);
 533                else
 534                        printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
 535        }
 536        if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
 537                free(cmd->cmd);
 538                free(cmd);
 539                if (cb)
 540                        free(cb->data);
 541                return NULL;
 542        }
 543        if (cmd->cb.data) {
 544                if (CAP(LITERALPLUS)) {
 545                        n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 546                        free(cmd->cb.data);
 547                        if (n != cmd->cb.dlen ||
 548                            socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 549                                free(cmd->cmd);
 550                                free(cmd);
 551                                return NULL;
 552                        }
 553                        cmd->cb.data = NULL;
 554                } else
 555                        imap->literal_pending = 1;
 556        } else if (cmd->cb.cont)
 557                imap->literal_pending = 1;
 558        cmd->next = NULL;
 559        *imap->in_progress_append = cmd;
 560        imap->in_progress_append = &cmd->next;
 561        imap->num_in_progress++;
 562        return cmd;
 563}
 564
 565__attribute__((format (printf, 3, 4)))
 566static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
 567                                       struct imap_cmd_cb *cb,
 568                                       const char *fmt, ...)
 569{
 570        struct imap_cmd *ret;
 571        va_list ap;
 572
 573        va_start(ap, fmt);
 574        ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
 575        va_end(ap);
 576        return ret;
 577}
 578
 579__attribute__((format (printf, 3, 4)))
 580static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
 581                     const char *fmt, ...)
 582{
 583        va_list ap;
 584        struct imap_cmd *cmdp;
 585
 586        va_start(ap, fmt);
 587        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 588        va_end(ap);
 589        if (!cmdp)
 590                return RESP_BAD;
 591
 592        return get_cmd_result(ctx, cmdp);
 593}
 594
 595__attribute__((format (printf, 3, 4)))
 596static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
 597                       const char *fmt, ...)
 598{
 599        va_list ap;
 600        struct imap_cmd *cmdp;
 601
 602        va_start(ap, fmt);
 603        cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
 604        va_end(ap);
 605        if (!cmdp)
 606                return DRV_STORE_BAD;
 607
 608        switch (get_cmd_result(ctx, cmdp)) {
 609        case RESP_BAD: return DRV_STORE_BAD;
 610        case RESP_NO: return DRV_MSG_BAD;
 611        default: return DRV_OK;
 612        }
 613}
 614
 615static int skip_imap_list_l(char **sp, int level)
 616{
 617        char *s = *sp;
 618
 619        for (;;) {
 620                while (isspace((unsigned char)*s))
 621                        s++;
 622                if (level && *s == ')') {
 623                        s++;
 624                        break;
 625                }
 626                if (*s == '(') {
 627                        /* sublist */
 628                        s++;
 629                        if (skip_imap_list_l(&s, level + 1))
 630                                goto bail;
 631                } else if (*s == '"') {
 632                        /* quoted string */
 633                        s++;
 634                        for (; *s != '"'; s++)
 635                                if (!*s)
 636                                        goto bail;
 637                        s++;
 638                } else {
 639                        /* atom */
 640                        for (; *s && !isspace((unsigned char)*s); s++)
 641                                if (level && *s == ')')
 642                                        break;
 643                }
 644
 645                if (!level)
 646                        break;
 647                if (!*s)
 648                        goto bail;
 649        }
 650        *sp = s;
 651        return 0;
 652
 653bail:
 654        return -1;
 655}
 656
 657static void skip_list(char **sp)
 658{
 659        skip_imap_list_l(sp, 0);
 660}
 661
 662static void parse_capability(struct imap *imap, char *cmd)
 663{
 664        char *arg;
 665        unsigned i;
 666
 667        imap->caps = 0x80000000;
 668        while ((arg = next_arg(&cmd)))
 669                for (i = 0; i < ARRAY_SIZE(cap_list); i++)
 670                        if (!strcmp(cap_list[i], arg))
 671                                imap->caps |= 1 << i;
 672        imap->rcaps = imap->caps;
 673}
 674
 675static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
 676                               char *s)
 677{
 678        struct imap *imap = ctx->imap;
 679        char *arg, *p;
 680
 681        if (*s != '[')
 682                return RESP_OK;         /* no response code */
 683        s++;
 684        if (!(p = strchr(s, ']'))) {
 685                fprintf(stderr, "IMAP error: malformed response code\n");
 686                return RESP_BAD;
 687        }
 688        *p++ = 0;
 689        arg = next_arg(&s);
 690        if (!strcmp("UIDVALIDITY", arg)) {
 691                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg))) {
 692                        fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
 693                        return RESP_BAD;
 694                }
 695        } else if (!strcmp("UIDNEXT", arg)) {
 696                if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
 697                        fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
 698                        return RESP_BAD;
 699                }
 700        } else if (!strcmp("CAPABILITY", arg)) {
 701                parse_capability(imap, s);
 702        } else if (!strcmp("ALERT", arg)) {
 703                /* RFC2060 says that these messages MUST be displayed
 704                 * to the user
 705                 */
 706                for (; isspace((unsigned char)*p); p++);
 707                fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
 708        } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
 709                if (!(arg = next_arg(&s)) || !(ctx->uidvalidity = atoi(arg)) ||
 710                    !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
 711                        fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
 712                        return RESP_BAD;
 713                }
 714        }
 715        return RESP_OK;
 716}
 717
 718static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
 719{
 720        struct imap *imap = ctx->imap;
 721        struct imap_cmd *cmdp, **pcmdp, *ncmdp;
 722        char *cmd, *arg, *arg1, *p;
 723        int n, resp, resp2, tag;
 724
 725        for (;;) {
 726                if (buffer_gets(&imap->buf, &cmd))
 727                        return RESP_BAD;
 728
 729                arg = next_arg(&cmd);
 730                if (*arg == '*') {
 731                        arg = next_arg(&cmd);
 732                        if (!arg) {
 733                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 734                                return RESP_BAD;
 735                        }
 736
 737                        if (!strcmp("NAMESPACE", arg)) {
 738                                /* rfc2342 NAMESPACE response. */
 739                                skip_list(&cmd); /* Personal mailboxes */
 740                                skip_list(&cmd); /* Others' mailboxes */
 741                                skip_list(&cmd); /* Shared mailboxes */
 742                        } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
 743                                   !strcmp("NO", arg) || !strcmp("BYE", arg)) {
 744                                if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
 745                                        return resp;
 746                        } else if (!strcmp("CAPABILITY", arg)) {
 747                                parse_capability(imap, cmd);
 748                        } else if ((arg1 = next_arg(&cmd))) {
 749                                ; /*
 750                                   * Unhandled response-data with at least two words.
 751                                   * Ignore it.
 752                                   *
 753                                   * NEEDSWORK: Previously this case handled '<num> EXISTS'
 754                                   * and '<num> RECENT' but as a probably-unintended side
 755                                   * effect it ignores other unrecognized two-word
 756                                   * responses.  imap-send doesn't ever try to read
 757                                   * messages or mailboxes these days, so consider
 758                                   * eliminating this case.
 759                                   */
 760                        } else {
 761                                fprintf(stderr, "IMAP error: unable to parse untagged response\n");
 762                                return RESP_BAD;
 763                        }
 764                } else if (!imap->in_progress) {
 765                        fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
 766                        return RESP_BAD;
 767                } else if (*arg == '+') {
 768                        /* This can happen only with the last command underway, as
 769                           it enforces a round-trip. */
 770                        cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
 771                               offsetof(struct imap_cmd, next));
 772                        if (cmdp->cb.data) {
 773                                n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
 774                                free(cmdp->cb.data);
 775                                cmdp->cb.data = NULL;
 776                                if (n != (int)cmdp->cb.dlen)
 777                                        return RESP_BAD;
 778                        } else if (cmdp->cb.cont) {
 779                                if (cmdp->cb.cont(ctx, cmdp, cmd))
 780                                        return RESP_BAD;
 781                        } else {
 782                                fprintf(stderr, "IMAP error: unexpected command continuation request\n");
 783                                return RESP_BAD;
 784                        }
 785                        if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
 786                                return RESP_BAD;
 787                        if (!cmdp->cb.cont)
 788                                imap->literal_pending = 0;
 789                        if (!tcmd)
 790                                return DRV_OK;
 791                } else {
 792                        tag = atoi(arg);
 793                        for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
 794                                if (cmdp->tag == tag)
 795                                        goto gottag;
 796                        fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
 797                        return RESP_BAD;
 798                gottag:
 799                        if (!(*pcmdp = cmdp->next))
 800                                imap->in_progress_append = pcmdp;
 801                        imap->num_in_progress--;
 802                        if (cmdp->cb.cont || cmdp->cb.data)
 803                                imap->literal_pending = 0;
 804                        arg = next_arg(&cmd);
 805                        if (!strcmp("OK", arg))
 806                                resp = DRV_OK;
 807                        else {
 808                                if (!strcmp("NO", arg)) {
 809                                        if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
 810                                                p = strchr(cmdp->cmd, '"');
 811                                                if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
 812                                                        resp = RESP_BAD;
 813                                                        goto normal;
 814                                                }
 815                                                /* not waiting here violates the spec, but a server that does not
 816                                                   grok this nonetheless violates it too. */
 817                                                cmdp->cb.create = 0;
 818                                                if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
 819                                                        resp = RESP_BAD;
 820                                                        goto normal;
 821                                                }
 822                                                free(cmdp->cmd);
 823                                                free(cmdp);
 824                                                if (!tcmd)
 825                                                        return 0;       /* ignored */
 826                                                if (cmdp == tcmd)
 827                                                        tcmd = ncmdp;
 828                                                continue;
 829                                        }
 830                                        resp = RESP_NO;
 831                                } else /*if (!strcmp("BAD", arg))*/
 832                                        resp = RESP_BAD;
 833                                fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
 834                                         memcmp(cmdp->cmd, "LOGIN", 5) ?
 835                                                        cmdp->cmd : "LOGIN <user> <pass>",
 836                                                        arg, cmd ? cmd : "");
 837                        }
 838                        if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
 839                                resp = resp2;
 840                normal:
 841                        if (cmdp->cb.done)
 842                                cmdp->cb.done(ctx, cmdp, resp);
 843                        free(cmdp->cb.data);
 844                        free(cmdp->cmd);
 845                        free(cmdp);
 846                        if (!tcmd || tcmd == cmdp)
 847                                return resp;
 848                }
 849        }
 850        /* not reached */
 851}
 852
 853static void imap_close_server(struct imap_store *ictx)
 854{
 855        struct imap *imap = ictx->imap;
 856
 857        if (imap->buf.sock.fd[0] != -1) {
 858                imap_exec(ictx, NULL, "LOGOUT");
 859                socket_shutdown(&imap->buf.sock);
 860        }
 861        free(imap);
 862}
 863
 864static void imap_close_store(struct imap_store *ctx)
 865{
 866        imap_close_server(ctx);
 867        free(ctx);
 868}
 869
 870#ifndef NO_OPENSSL
 871
 872/*
 873 * hexchar() and cram() functions are based on the code from the isync
 874 * project (http://isync.sf.net/).
 875 */
 876static char hexchar(unsigned int b)
 877{
 878        return b < 10 ? '0' + b : 'a' + (b - 10);
 879}
 880
 881#define ENCODED_SIZE(n) (4*((n+2)/3))
 882static char *cram(const char *challenge_64, const char *user, const char *pass)
 883{
 884        int i, resp_len, encoded_len, decoded_len;
 885        HMAC_CTX hmac;
 886        unsigned char hash[16];
 887        char hex[33];
 888        char *response, *response_64, *challenge;
 889
 890        /*
 891         * length of challenge_64 (i.e. base-64 encoded string) is a good
 892         * enough upper bound for challenge (decoded result).
 893         */
 894        encoded_len = strlen(challenge_64);
 895        challenge = xmalloc(encoded_len);
 896        decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
 897                                      (unsigned char *)challenge_64, encoded_len);
 898        if (decoded_len < 0)
 899                die("invalid challenge %s", challenge_64);
 900        HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
 901        HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
 902        HMAC_Final(&hmac, hash, NULL);
 903        HMAC_CTX_cleanup(&hmac);
 904
 905        hex[32] = 0;
 906        for (i = 0; i < 16; i++) {
 907                hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
 908                hex[2 * i + 1] = hexchar(hash[i] & 0xf);
 909        }
 910
 911        /* response: "<user> <digest in hex>" */
 912        resp_len = strlen(user) + 1 + strlen(hex) + 1;
 913        response = xmalloc(resp_len);
 914        sprintf(response, "%s %s", user, hex);
 915
 916        response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
 917        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
 918                                      (unsigned char *)response, resp_len);
 919        if (encoded_len < 0)
 920                die("EVP_EncodeBlock error");
 921        response_64[encoded_len] = '\0';
 922        return (char *)response_64;
 923}
 924
 925#else
 926
 927static char *cram(const char *challenge_64, const char *user, const char *pass)
 928{
 929        die("If you want to use CRAM-MD5 authenticate method, "
 930            "you have to build git-imap-send with OpenSSL library.");
 931}
 932
 933#endif
 934
 935static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
 936{
 937        int ret;
 938        char *response;
 939
 940        response = cram(prompt, server.user, server.pass);
 941
 942        ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
 943        if (ret != strlen(response))
 944                return error("IMAP error: sending response failed");
 945
 946        free(response);
 947
 948        return 0;
 949}
 950
 951static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
 952{
 953        struct imap_store *ctx;
 954        struct imap *imap;
 955        char *arg, *rsp;
 956        int s = -1, preauth;
 957
 958        ctx = xcalloc(sizeof(*ctx), 1);
 959
 960        ctx->imap = imap = xcalloc(sizeof(*imap), 1);
 961        imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
 962        imap->in_progress_append = &imap->in_progress;
 963
 964        /* open connection to IMAP server */
 965
 966        if (srvc->tunnel) {
 967                const char *argv[] = { srvc->tunnel, NULL };
 968                struct child_process tunnel = {NULL};
 969
 970                imap_info("Starting tunnel '%s'... ", srvc->tunnel);
 971
 972                tunnel.argv = argv;
 973                tunnel.use_shell = 1;
 974                tunnel.in = -1;
 975                tunnel.out = -1;
 976                if (start_command(&tunnel))
 977                        die("cannot start proxy %s", argv[0]);
 978
 979                imap->buf.sock.fd[0] = tunnel.out;
 980                imap->buf.sock.fd[1] = tunnel.in;
 981
 982                imap_info("ok\n");
 983        } else {
 984#ifndef NO_IPV6
 985                struct addrinfo hints, *ai0, *ai;
 986                int gai;
 987                char portstr[6];
 988
 989                snprintf(portstr, sizeof(portstr), "%d", srvc->port);
 990
 991                memset(&hints, 0, sizeof(hints));
 992                hints.ai_socktype = SOCK_STREAM;
 993                hints.ai_protocol = IPPROTO_TCP;
 994
 995                imap_info("Resolving %s... ", srvc->host);
 996                gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
 997                if (gai) {
 998                        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
 999                        goto bail;
1000                }
1001                imap_info("ok\n");
1002
1003                for (ai0 = ai; ai; ai = ai->ai_next) {
1004                        char addr[NI_MAXHOST];
1005
1006                        s = socket(ai->ai_family, ai->ai_socktype,
1007                                   ai->ai_protocol);
1008                        if (s < 0)
1009                                continue;
1010
1011                        getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1012                                    sizeof(addr), NULL, 0, NI_NUMERICHOST);
1013                        imap_info("Connecting to [%s]:%s... ", addr, portstr);
1014
1015                        if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1016                                close(s);
1017                                s = -1;
1018                                perror("connect");
1019                                continue;
1020                        }
1021
1022                        break;
1023                }
1024                freeaddrinfo(ai0);
1025#else /* NO_IPV6 */
1026                struct hostent *he;
1027                struct sockaddr_in addr;
1028
1029                memset(&addr, 0, sizeof(addr));
1030                addr.sin_port = htons(srvc->port);
1031                addr.sin_family = AF_INET;
1032
1033                imap_info("Resolving %s... ", srvc->host);
1034                he = gethostbyname(srvc->host);
1035                if (!he) {
1036                        perror("gethostbyname");
1037                        goto bail;
1038                }
1039                imap_info("ok\n");
1040
1041                addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1042
1043                s = socket(PF_INET, SOCK_STREAM, 0);
1044
1045                imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1046                if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1047                        close(s);
1048                        s = -1;
1049                        perror("connect");
1050                }
1051#endif
1052                if (s < 0) {
1053                        fputs("Error: unable to connect to server.\n", stderr);
1054                        goto bail;
1055                }
1056
1057                imap->buf.sock.fd[0] = s;
1058                imap->buf.sock.fd[1] = dup(s);
1059
1060                if (srvc->use_ssl &&
1061                    ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1062                        close(s);
1063                        goto bail;
1064                }
1065                imap_info("ok\n");
1066        }
1067
1068        /* read the greeting string */
1069        if (buffer_gets(&imap->buf, &rsp)) {
1070                fprintf(stderr, "IMAP error: no greeting response\n");
1071                goto bail;
1072        }
1073        arg = next_arg(&rsp);
1074        if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1075                fprintf(stderr, "IMAP error: invalid greeting response\n");
1076                goto bail;
1077        }
1078        preauth = 0;
1079        if (!strcmp("PREAUTH", arg))
1080                preauth = 1;
1081        else if (strcmp("OK", arg) != 0) {
1082                fprintf(stderr, "IMAP error: unknown greeting response\n");
1083                goto bail;
1084        }
1085        parse_response_code(ctx, NULL, rsp);
1086        if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1087                goto bail;
1088
1089        if (!preauth) {
1090#ifndef NO_OPENSSL
1091                if (!srvc->use_ssl && CAP(STARTTLS)) {
1092                        if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1093                                goto bail;
1094                        if (ssl_socket_connect(&imap->buf.sock, 1,
1095                                               srvc->ssl_verify))
1096                                goto bail;
1097                        /* capabilities may have changed, so get the new capabilities */
1098                        if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1099                                goto bail;
1100                }
1101#endif
1102                imap_info("Logging in...\n");
1103                if (!srvc->user) {
1104                        fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1105                        goto bail;
1106                }
1107                if (!srvc->pass) {
1108                        struct strbuf prompt = STRBUF_INIT;
1109                        strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1110                        arg = git_getpass(prompt.buf);
1111                        strbuf_release(&prompt);
1112                        if (!*arg) {
1113                                fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1114                                goto bail;
1115                        }
1116                        /*
1117                         * getpass() returns a pointer to a static buffer.  make a copy
1118                         * for long term storage.
1119                         */
1120                        srvc->pass = xstrdup(arg);
1121                }
1122                if (CAP(NOLOGIN)) {
1123                        fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1124                        goto bail;
1125                }
1126
1127                if (srvc->auth_method) {
1128                        struct imap_cmd_cb cb;
1129
1130                        if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1131                                if (!CAP(AUTH_CRAM_MD5)) {
1132                                        fprintf(stderr, "You specified"
1133                                                "CRAM-MD5 as authentication method, "
1134                                                "but %s doesn't support it.\n", srvc->host);
1135                                        goto bail;
1136                                }
1137                                /* CRAM-MD5 */
1138
1139                                memset(&cb, 0, sizeof(cb));
1140                                cb.cont = auth_cram_md5;
1141                                if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1142                                        fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1143                                        goto bail;
1144                                }
1145                        } else {
1146                                fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1147                                goto bail;
1148                        }
1149                } else {
1150                        if (!imap->buf.sock.ssl)
1151                                imap_warn("*** IMAP Warning *** Password is being "
1152                                          "sent in the clear\n");
1153                        if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1154                                fprintf(stderr, "IMAP error: LOGIN failed\n");
1155                                goto bail;
1156                        }
1157                }
1158        } /* !preauth */
1159
1160        ctx->prefix = "";
1161        return ctx;
1162
1163bail:
1164        imap_close_store(ctx);
1165        return NULL;
1166}
1167
1168/*
1169 * Insert CR characters as necessary in *msg to ensure that every LF
1170 * character in *msg is preceded by a CR.
1171 */
1172static void lf_to_crlf(struct strbuf *msg)
1173{
1174        char *new;
1175        size_t i, j;
1176        char lastc;
1177
1178        /* First pass: tally, in j, the size of the new string: */
1179        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1180                if (msg->buf[i] == '\n' && lastc != '\r')
1181                        j++; /* a CR will need to be added here */
1182                lastc = msg->buf[i];
1183                j++;
1184        }
1185
1186        new = xmalloc(j + 1);
1187
1188        /*
1189         * Second pass: write the new string.  Note that this loop is
1190         * otherwise identical to the first pass.
1191         */
1192        for (i = j = 0, lastc = '\0'; i < msg->len; i++) {
1193                if (msg->buf[i] == '\n' && lastc != '\r')
1194                        new[j++] = '\r';
1195                lastc = new[j++] = msg->buf[i];
1196        }
1197        strbuf_attach(msg, new, j, j + 1);
1198}
1199
1200/*
1201 * Store msg to IMAP.  Also detach and free the data from msg->data,
1202 * leaving msg->data empty.
1203 */
1204static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1205{
1206        struct imap *imap = ctx->imap;
1207        struct imap_cmd_cb cb;
1208        const char *prefix, *box;
1209        int ret;
1210
1211        lf_to_crlf(msg);
1212        memset(&cb, 0, sizeof(cb));
1213
1214        cb.dlen = msg->len;
1215        cb.data = strbuf_detach(msg, NULL);
1216
1217        box = ctx->name;
1218        prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1219        cb.create = 0;
1220        ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1221        imap->caps = imap->rcaps;
1222        if (ret != DRV_OK)
1223                return ret;
1224
1225        return DRV_OK;
1226}
1227
1228static void wrap_in_html(struct strbuf *msg)
1229{
1230        struct strbuf buf = STRBUF_INIT;
1231        static char *content_type = "Content-Type: text/html;\n";
1232        static char *pre_open = "<pre>\n";
1233        static char *pre_close = "</pre>\n";
1234        const char *body = strstr(msg->buf, "\n\n");
1235
1236        if (!body)
1237                return; /* Headers but no body; no wrapping needed */
1238
1239        body += 2;
1240
1241        strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1242        strbuf_addstr(&buf, content_type);
1243        strbuf_addch(&buf, '\n');
1244        strbuf_addstr(&buf, pre_open);
1245        strbuf_addstr_xml_quoted(&buf, body);
1246        strbuf_addstr(&buf, pre_close);
1247
1248        strbuf_release(msg);
1249        *msg = buf;
1250}
1251
1252#define CHUNKSIZE 0x1000
1253
1254static int read_message(FILE *f, struct strbuf *all_msgs)
1255{
1256        do {
1257                if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1258                        break;
1259        } while (!feof(f));
1260
1261        return ferror(f) ? -1 : 0;
1262}
1263
1264static int count_messages(struct strbuf *all_msgs)
1265{
1266        int count = 0;
1267        char *p = all_msgs->buf;
1268
1269        while (1) {
1270                if (!prefixcmp(p, "From ")) {
1271                        p = strstr(p+5, "\nFrom: ");
1272                        if (!p) break;
1273                        p = strstr(p+7, "\nDate: ");
1274                        if (!p) break;
1275                        p = strstr(p+7, "\nSubject: ");
1276                        if (!p) break;
1277                        p += 10;
1278                        count++;
1279                }
1280                p = strstr(p+5, "\nFrom ");
1281                if (!p)
1282                        break;
1283                p++;
1284        }
1285        return count;
1286}
1287
1288/*
1289 * Copy the next message from all_msgs, starting at offset *ofs, to
1290 * msg.  Update *ofs to the start of the following message.  Return
1291 * true iff a message was successfully copied.
1292 */
1293static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1294{
1295        char *p, *data;
1296        size_t len;
1297
1298        if (*ofs >= all_msgs->len)
1299                return 0;
1300
1301        data = &all_msgs->buf[*ofs];
1302        len = all_msgs->len - *ofs;
1303
1304        if (len < 5 || prefixcmp(data, "From "))
1305                return 0;
1306
1307        p = strchr(data, '\n');
1308        if (p) {
1309                p++;
1310                len -= p - data;
1311                *ofs += p - data;
1312                data = p;
1313        }
1314
1315        p = strstr(data, "\nFrom ");
1316        if (p)
1317                len = &p[1] - data;
1318
1319        strbuf_add(msg, data, len);
1320        *ofs += len;
1321        return 1;
1322}
1323
1324static char *imap_folder;
1325
1326static int git_imap_config(const char *key, const char *val, void *cb)
1327{
1328        char imap_key[] = "imap.";
1329
1330        if (strncmp(key, imap_key, sizeof imap_key - 1))
1331                return 0;
1332
1333        key += sizeof imap_key - 1;
1334
1335        /* check booleans first, and barf on others */
1336        if (!strcmp("sslverify", key))
1337                server.ssl_verify = git_config_bool(key, val);
1338        else if (!strcmp("preformattedhtml", key))
1339                server.use_html = git_config_bool(key, val);
1340        else if (!val)
1341                return config_error_nonbool(key);
1342
1343        if (!strcmp("folder", key)) {
1344                imap_folder = xstrdup(val);
1345        } else if (!strcmp("host", key)) {
1346                if (!prefixcmp(val, "imap:"))
1347                        val += 5;
1348                else if (!prefixcmp(val, "imaps:")) {
1349                        val += 6;
1350                        server.use_ssl = 1;
1351                }
1352                if (!prefixcmp(val, "//"))
1353                        val += 2;
1354                server.host = xstrdup(val);
1355        } else if (!strcmp("user", key))
1356                server.user = xstrdup(val);
1357        else if (!strcmp("pass", key))
1358                server.pass = xstrdup(val);
1359        else if (!strcmp("port", key))
1360                server.port = git_config_int(key, val);
1361        else if (!strcmp("tunnel", key))
1362                server.tunnel = xstrdup(val);
1363        else if (!strcmp("authmethod", key))
1364                server.auth_method = xstrdup(val);
1365
1366        return 0;
1367}
1368
1369int main(int argc, char **argv)
1370{
1371        struct strbuf all_msgs = STRBUF_INIT;
1372        struct strbuf msg = STRBUF_INIT;
1373        struct imap_store *ctx = NULL;
1374        int ofs = 0;
1375        int r;
1376        int total, n = 0;
1377        int nongit_ok;
1378
1379        git_extract_argv0_path(argv[0]);
1380
1381        git_setup_gettext();
1382
1383        if (argc != 1)
1384                usage(imap_send_usage);
1385
1386        setup_git_directory_gently(&nongit_ok);
1387        git_config(git_imap_config, NULL);
1388
1389        if (!server.port)
1390                server.port = server.use_ssl ? 993 : 143;
1391
1392        if (!imap_folder) {
1393                fprintf(stderr, "no imap store specified\n");
1394                return 1;
1395        }
1396        if (!server.host) {
1397                if (!server.tunnel) {
1398                        fprintf(stderr, "no imap host specified\n");
1399                        return 1;
1400                }
1401                server.host = "tunnel";
1402        }
1403
1404        /* read the messages */
1405        if (read_message(stdin, &all_msgs)) {
1406                fprintf(stderr, "error reading input\n");
1407                return 1;
1408        }
1409
1410        if (all_msgs.len == 0) {
1411                fprintf(stderr, "nothing to send\n");
1412                return 1;
1413        }
1414
1415        total = count_messages(&all_msgs);
1416        if (!total) {
1417                fprintf(stderr, "no messages to send\n");
1418                return 1;
1419        }
1420
1421        /* write it to the imap server */
1422        ctx = imap_open_store(&server);
1423        if (!ctx) {
1424                fprintf(stderr, "failed to open store\n");
1425                return 1;
1426        }
1427
1428        fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1429        ctx->name = imap_folder;
1430        while (1) {
1431                unsigned percent = n * 100 / total;
1432
1433                fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1434                if (!split_msg(&all_msgs, &msg, &ofs))
1435                        break;
1436                if (server.use_html)
1437                        wrap_in_html(&msg);
1438                r = imap_store_msg(ctx, &msg);
1439                if (r != DRV_OK)
1440                        break;
1441                n++;
1442        }
1443        fprintf(stderr, "\n");
1444
1445        imap_close_store(ctx);
1446
1447        return 0;
1448}