bti.c

   1 /*
   2  * Copyright (C) 2008-2010 Greg Kroah-Hartman <greg@kroah.com>
   3  * Copyright (C) 2009 Bart Trojanowski <bart@jukie.net>
   4  * Copyright (C) 2009-2010 Amir Mohammad Saied <amirsaied@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  */
  19
  20 #define _GNU_SOURCE
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <stddef.h>
  25 #include <string.h>
  26 #include <getopt.h>
  27 #include <errno.h>
  28 #include <ctype.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <time.h>
  32 #include <sys/stat.h>
  33 #include <sys/types.h>
  34 #include <sys/wait.h>
  35 #include <curl/curl.h>
  36 #include <libxml/xmlmemory.h>
  37 #include <libxml/parser.h>
  38 #include <libxml/tree.h>
  39 #include <pcre.h>
  40 #include <termios.h>
  41 #include <dlfcn.h>
  42 #include <oauth.h>
  43
  44
  45 #define zalloc(size)    calloc(size, 1)
  46
  47 #define dbg(format, arg...)                                             \
  48         do {                                                            \
  49                 if (debug)                                              \
  50                         fprintf(stdout, "bti: %s: " format , __func__ , \
  51                                 ## arg);                                \
  52         } while (0)
  53
  54
  55 static int debug;
  56
  57 enum host {
  58         HOST_TWITTER  = 0,
  59         HOST_IDENTICA = 1,
  60         HOST_CUSTOM   = 2
  61 };
  62
  63 enum action {
  64         ACTION_UPDATE  = 0,
  65         ACTION_FRIENDS = 1,
  66         ACTION_USER    = 2,
  67         ACTION_REPLIES = 4,
  68         ACTION_PUBLIC  = 8,
  69         ACTION_GROUP   = 16,
  70         ACTION_RETWEET = 32,
  71         ACTION_UNKNOWN = 64
  72 };
  73
  74 struct session {
  75         char *password;
  76         char *account;
  77         char *consumer_key;
  78         char *consumer_secret;
  79         char *access_token_key;
  80         char *access_token_secret;
  81         char *tweet;
  82         char *proxy;
  83         char *time;
  84         char *homedir;
  85         char *logfile;
  86         char *user;
  87         char *group;
  88         char *hosturl;
  89         char *hostname;
  90         char *configfile;
  91         char *replyto;
  92         char *retweet;
  93         int bash;
  94         int background;
  95         int interactive;
  96         int shrink_urls;
  97         int dry_run;
  98         int page;
  99         int no_oauth;
 100         int guest;
 101         int verbose;
 102         enum host host;
 103         enum action action;
 104         void *readline_handle;
 105         char *(*readline)(const char *);
 106 };
 107
 108 struct bti_curl_buffer {
 109         char *data;
 110         struct session *session;
 111         enum action action;
 112         int length;
 113 };
 114
 115 static void display_help(void)
 116 {
 117         fprintf(stdout, "bti - send tweet to twitter or identi.ca\n"
 118                 "Version: %s\n"
 119                 "Usage:\n"
 120                 "  bti [options]\n"
 121                 "options are:\n"
 122                 "  --account accountname\n"
 123                 "  --password password\n"
 124                 "  --action action\n"
 125                 "    ('update', 'friends', 'public', 'replies', or 'user')\n"
 126                 "  --user screenname\n"
 127                 "  --group groupname\n"
 128                 "  --proxy PROXY:PORT\n"
 129                 "  --host HOST\n"
 130                 "  --logfile logfile\n"
 131                 "  --config configfile\n"
 132                 "  --replyto ID\n"
 133                 "  --retweet ID\n"
 134                 "  --shrink-urls\n"
 135                 "  --page PAGENUMBER\n"
 136                 "  --bash\n"
 137                 "  --background\n"
 138                 "  --debug\n"
 139                 "  --verbose\n"
 140                 "  --dry-run\n"
 141                 "  --version\n"
 142                 "  --help\n", VERSION);
 143 }
 144
 145 static void display_version(void)
 146 {
 147         fprintf(stdout, "bti - version %s\n", VERSION);
 148 }
 149
 150 static char *get_string(const char *name)
 151 {
 152         char *temp;
 153         char *string;
 154
 155         string = zalloc(1000);
 156         if (!string)
 157                 exit(1);
 158         if (name != NULL)
 159                 fprintf(stdout, "%s", name);
 160         if (!fgets(string, 999, stdin))
 161                 return NULL;
 162         temp = strchr(string, '\n');
 163         if (temp)
 164                 *temp = '\0';
 165         return string;
 166 }
 167
 168 /*
 169  * Try to get a handle to a readline function from a variety of different
 170  * libraries.  If nothing is present on the system, then fall back to an
 171  * internal one.
 172  *
 173  * Logic originally based off of code in the e2fsutils package in the
 174  * lib/ss/get_readline.c file, which is licensed under the MIT license.
 175  *
 176  * This keeps us from having to relicense the bti codebase if readline
 177  * ever changes its license, as there is no link-time dependancy.
 178  * It is a run-time thing only, and we handle any readline-like library
 179  * in the same manner, making bti not be a derivative work of any
 180  * other program.
 181  */
 182 static void session_readline_init(struct session *session)
 183 {
 184         /* Libraries we will try to use for readline/editline functionality */
 185         const char *libpath = "libreadline.so.6:libreadline.so.5:"
 186                                 "libreadline.so.4:libreadline.so:libedit.so.2:"
 187                                 "libedit.so:libeditline.so.0:libeditline.so";
 188         void *handle = NULL;
 189         char *tmp, *cp, *next;
 190         int (*bind_key)(int, void *);
 191         void (*insert)(void);
 192
 193         /* default to internal function if we can't or won't find anything */
 194         session->readline = get_string;
 195         if (!isatty(0))
 196                 return;
 197         session->interactive = 1;
 198
 199         tmp = malloc(strlen(libpath)+1);
 200         if (!tmp)
 201                 return;
 202         strcpy(tmp, libpath);
 203         for (cp = tmp; cp; cp = next) {
 204                 next = strchr(cp, ':');
 205                 if (next)
 206                         *next++ = 0;
 207                 if (*cp == 0)
 208                         continue;
 209                 handle = dlopen(cp, RTLD_NOW);
 210                 if (handle) {
 211                         dbg("Using %s for readline library\n", cp);
 212                         break;
 213                 }
 214         }
 215         free(tmp);
 216         if (!handle) {
 217                 dbg("No readline library found.\n");
 218                 return;
 219         }
 220
 221         session->readline_handle = handle;
 222         session->readline = (char *(*)(const char *))dlsym(handle, "readline");
 223         if (session->readline == NULL) {
 224                 /* something odd happened, default back to internal stuff */
 225                 session->readline_handle = NULL;
 226                 session->readline = get_string;
 227                 return;
 228         }
 229
 230         /*
 231          * If we found a library, turn off filename expansion
 232          * as that makes no sense from within bti.
 233          */
 234         bind_key = (int (*)(int, void *))dlsym(handle, "rl_bind_key");
 235         insert = (void (*)(void))dlsym(handle, "rl_insert");
 236         if (bind_key && insert)
 237                 bind_key('\t', insert);
 238 }
 239
 240 static void session_readline_cleanup(struct session *session)
 241 {
 242         if (session->readline_handle)
 243                 dlclose(session->readline_handle);
 244 }
 245
 246 static struct session *session_alloc(void)
 247 {
 248         struct session *session;
 249
 250         session = zalloc(sizeof(*session));
 251         if (!session)
 252                 return NULL;
 253         return session;
 254 }
 255
 256 static void session_free(struct session *session)
 257 {
 258         if (!session)
 259                 return;
 260         free(session->retweet);
 261         free(session->replyto);
 262         free(session->password);
 263         free(session->account);
 264         free(session->consumer_key);
 265         free(session->consumer_secret);
 266         free(session->access_token_key);
 267         free(session->access_token_secret);
 268         free(session->tweet);
 269         free(session->proxy);
 270         free(session->time);
 271         free(session->homedir);
 272         free(session->user);
 273         free(session->group);
 274         free(session->hosturl);
 275         free(session->hostname);
 276         free(session->configfile);
 277         free(session);
 278 }
 279
 280 static struct bti_curl_buffer *bti_curl_buffer_alloc(enum action action)
 281 {
 282         struct bti_curl_buffer *buffer;
 283
 284         buffer = zalloc(sizeof(*buffer));
 285         if (!buffer)
 286                 return NULL;
 287
 288         /* start out with a data buffer of 1 byte to
 289          * make the buffer fill logic simpler */
 290         buffer->data = zalloc(1);
 291         if (!buffer->data) {
 292                 free(buffer);
 293                 return NULL;
 294         }
 295         buffer->length = 0;
 296         buffer->action = action;
 297         return buffer;
 298 }
 299
 300 static void bti_curl_buffer_free(struct bti_curl_buffer *buffer)
 301 {
 302         if (!buffer)
 303                 return;
 304         free(buffer->data);
 305         free(buffer);
 306 }
 307
 308 static const char twitter_host[]  = "http://api.twitter.com/1/statuses";
 309 static const char identica_host[] = "https://identi.ca/api/statuses";
 310 static const char twitter_name[]  = "twitter";
 311 static const char identica_name[] = "identi.ca";
 312
 313 static const char twitter_request_token_uri[]  = "http://twitter.com/oauth/request_token";
 314 static const char twitter_access_token_uri[]   = "http://twitter.com/oauth/access_token";
 315 static const char twitter_authorize_uri[]      = "http://twitter.com/oauth/authorize?oauth_token=";
 316 static const char identica_request_token_uri[] = "http://identi.ca/api/oauth/request_token?oauth_callback=oob";
 317 static const char identica_access_token_uri[]  = "http://identi.ca/api/oauth/access_token";
 318 static const char identica_authorize_uri[]     = "http://identi.ca/api/oauth/authorize?oauth_token=";
 319
 320 static const char user_uri[]     = "/user_timeline/";
 321 static const char update_uri[]   = "/update.xml";
 322 static const char public_uri[]   = "/public_timeline.xml";
 323 static const char friends_uri[]  = "/friends_timeline.xml";
 324 static const char mentions_uri[] = "/mentions.xml";
 325 static const char replies_uri[]  = "/replies.xml";
 326 static const char retweet_uri[]  = "/retweet/";
 327 static const char group_uri[]    = "/../statusnet/groups/timeline/";
 328
 329 static CURL *curl_init(void)
 330 {
 331         CURL *curl;
 332
 333         curl = curl_easy_init();
 334         if (!curl) {
 335                 fprintf(stderr, "Can not init CURL!\n");
 336                 return NULL;
 337         }
 338         /* some ssl sanity checks on the connection we are making */
 339         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 340         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 341         return curl;
 342 }
 343
 344 static void parse_statuses(struct session *session,
 345                            xmlDocPtr doc, xmlNodePtr current)
 346 {
 347         xmlChar *text = NULL;
 348         xmlChar *user = NULL;
 349         xmlChar *created = NULL;
 350         xmlChar *id = NULL;
 351         xmlNodePtr userinfo;
 352
 353         current = current->xmlChildrenNode;
 354         while (current != NULL) {
 355                 if (current->type == XML_ELEMENT_NODE) {
 356                         if (!xmlStrcmp(current->name, (const xmlChar *)"created_at"))
 357                                 created = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 358                         if (!xmlStrcmp(current->name, (const xmlChar *)"text"))
 359                                 text = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 360                         if (!xmlStrcmp(current->name, (const xmlChar *)"id"))
 361                                 id = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 362                         if (!xmlStrcmp(current->name, (const xmlChar *)"user")) {
 363                                 userinfo = current->xmlChildrenNode;
 364                                 while (userinfo != NULL) {
 365                                         if ((!xmlStrcmp(userinfo->name, (const xmlChar *)"screen_name"))) {
 366                                                 if (user)
 367                                                         xmlFree(user);
 368                                                 user = xmlNodeListGetString(doc, userinfo->xmlChildrenNode, 1);
 369                                         }
 370                                         userinfo = userinfo->next;
 371                                 }
 372                         }
 373
 374                         if (user && text && created && id) {
 375                                 if (session->verbose)
 376                                         printf("[%s] {%s} (%.16s) %s\n",
 377                                                 user, id, created, text);
 378                                 else
 379                                         printf("[%s] %s\n",
 380                                                 user, text);
 381                                 xmlFree(user);
 382                                 xmlFree(text);
 383                                 xmlFree(created);
 384                                 xmlFree(id);
 385                                 user = NULL;
 386                                 text = NULL;
 387                                 created = NULL;
 388                                 id = NULL;
 389                         }
 390                 }
 391                 current = current->next;
 392         }
 393
 394         return;
 395 }
 396
 397 static void parse_timeline(char *document, struct session *session)
 398 {
 399         xmlDocPtr doc;
 400         xmlNodePtr current;
 401
 402         doc = xmlReadMemory(document, strlen(document), "timeline.xml",
 403                             NULL, XML_PARSE_NOERROR);
 404         if (doc == NULL)
 405                 return;
 406
 407         current = xmlDocGetRootElement(doc);
 408         if (current == NULL) {
 409                 fprintf(stderr, "empty document\n");
 410                 xmlFreeDoc(doc);
 411                 return;
 412         }
 413
 414         if (xmlStrcmp(current->name, (const xmlChar *) "statuses")) {
 415                 fprintf(stderr, "unexpected document type\n");
 416                 xmlFreeDoc(doc);
 417                 return;
 418         }
 419
 420         current = current->xmlChildrenNode;
 421         while (current != NULL) {
 422                 if ((!xmlStrcmp(current->name, (const xmlChar *)"status")))
 423                         parse_statuses(session, doc, current);
 424                 current = current->next;
 425         }
 426         xmlFreeDoc(doc);
 427
 428         return;
 429 }
 430
 431 static size_t curl_callback(void *buffer, size_t size, size_t nmemb,
 432                             void *userp)
 433 {
 434         struct bti_curl_buffer *curl_buf = userp;
 435         size_t buffer_size = size * nmemb;
 436         char *temp;
 437
 438         if ((!buffer) || (!buffer_size) || (!curl_buf))
 439                 return -EINVAL;
 440
 441         /* add to the data we already have */
 442         temp = zalloc(curl_buf->length + buffer_size + 1);
 443         if (!temp)
 444                 return -ENOMEM;
 445
 446         memcpy(temp, curl_buf->data, curl_buf->length);
 447         free(curl_buf->data);
 448         curl_buf->data = temp;
 449         memcpy(&curl_buf->data[curl_buf->length], (char *)buffer, buffer_size);
 450         curl_buf->length += buffer_size;
 451         if (curl_buf->action)
 452                 parse_timeline(curl_buf->data, curl_buf->session);
 453
 454         dbg("%s\n", curl_buf->data);
 455
 456         return buffer_size;
 457 }
 458
 459 static int parse_osp_reply(const char *reply, char **token, char **secret)
 460 {
 461         int rc;
 462         int retval = 1;
 463         char **rv = NULL;
 464         rc = oauth_split_url_parameters(reply, &rv);
 465         qsort(rv, rc, sizeof(char *), oauth_cmpstringp);
 466         if (rc == 2 || rc == 4) {
 467                 if (!strncmp(rv[0], "oauth_token=", 11) &&
 468                     !strncmp(rv[1], "oauth_token_secret=", 18)) {
 469                         if (token)
 470                                 *token = strdup(&(rv[0][12]));
 471                         if (secret)
 472                                 *secret = strdup(&(rv[1][19]));
 473
 474                         retval = 0;
 475                 }
 476         } else if (rc == 3) {
 477                 if (!strncmp(rv[1], "oauth_token=", 11) &&
 478                     !strncmp(rv[2], "oauth_token_secret=", 18)) {
 479                         if (token)
 480                                 *token = strdup(&(rv[1][12]));
 481                         if (secret)
 482                                 *secret = strdup(&(rv[2][19]));
 483
 484                         retval = 0;
 485                 }
 486         }
 487
 488         dbg("token: %s\n", *token);
 489         dbg("secret: %s\n", *secret);
 490
 491         if (rv)
 492                 free(rv);
 493
 494         return retval;
 495 }
 496
 497 static int request_access_token(struct session *session)
 498 {
 499         char *post_params = NULL;
 500         char *request_url = NULL;
 501         char *reply       = NULL;
 502         char *at_key      = NULL;
 503         char *at_secret   = NULL;
 504         char *verifier    = NULL;
 505         char at_uri[90];
 506
 507         if (!session)
 508                 return -EINVAL;
 509
 510         if (session->host == HOST_TWITTER)
 511                 request_url = oauth_sign_url2(
 512                                 twitter_request_token_uri, NULL,
 513                                 OA_HMAC, NULL, session->consumer_key,
 514                                 session->consumer_secret, NULL, NULL);
 515         else if (session->host == HOST_IDENTICA)
 516                 request_url = oauth_sign_url2(
 517                                 identica_request_token_uri, NULL,
 518                                 OA_HMAC, NULL, session->consumer_key,
 519                                 session->consumer_secret, NULL, NULL);
 520         reply = oauth_http_get(request_url, post_params);
 521
 522         if (request_url)
 523                 free(request_url);
 524
 525         if (post_params)
 526                 free(post_params);
 527
 528         if (!reply)
 529                 return 1;
 530
 531         if (parse_osp_reply(reply, &at_key, &at_secret))
 532                 return 1;
 533
 534         free(reply);
 535
 536         fprintf(stdout,
 537                 "Please open the following link in your browser, and "
 538                 "allow 'bti' to access your account. Then paste "
 539                 "back the provided PIN in here.\n");
 540         if (session->host == HOST_TWITTER) {
 541                 fprintf(stdout, "%s%s\nPIN: ", twitter_authorize_uri, at_key);
 542                 verifier = session->readline(NULL);
 543                 sprintf(at_uri, "%s?oauth_verifier=%s",
 544                         twitter_access_token_uri, verifier);
 545         } else if (session->host == HOST_IDENTICA) {
 546                 fprintf(stdout, "%s%s\nPIN: ", identica_authorize_uri, at_key);
 547                 verifier = session->readline(NULL);
 548                 sprintf(at_uri, "%s?oauth_verifier=%s",
 549                         identica_access_token_uri, verifier);
 550         }
 551         request_url = oauth_sign_url2(at_uri, NULL, OA_HMAC, NULL,
 552                                       session->consumer_key,
 553                                       session->consumer_secret,
 554                                       at_key, at_secret);
 555         reply = oauth_http_get(request_url, post_params);
 556
 557         if (!reply)
 558                 return 1;
 559
 560         if (parse_osp_reply(reply, &at_key, &at_secret))
 561                 return 1;
 562
 563         free(reply);
 564
 565         fprintf(stdout,
 566                 "Please put these two lines in your bti "
 567                 "configuration file (~/.bti):\n"
 568                 "access_token_key=%s\n"
 569                 "access_token_secret=%s\n",
 570                 at_key, at_secret);
 571
 572         return 0;
 573 }
 574
 575 static int send_request(struct session *session)
 576 {
 577         char endpoint[500];
 578         char user_password[500];
 579         char data[500];
 580         struct bti_curl_buffer *curl_buf;
 581         CURL *curl = NULL;
 582         CURLcode res;
 583         struct curl_httppost *formpost = NULL;
 584         struct curl_httppost *lastptr = NULL;
 585         struct curl_slist *slist = NULL;
 586         char *req_url = NULL;
 587         char *reply = NULL;
 588         char *postarg = NULL;
 589         char *escaped_tweet = NULL;
 590         int is_post = 0;
 591
 592         if (!session)
 593                 return -EINVAL;
 594
 595         if (!session->hosturl)
 596                 session->hosturl = strdup(twitter_host);
 597
 598         if (session->no_oauth || session->guest) {
 599                 curl_buf = bti_curl_buffer_alloc(session->action);
 600                 if (!curl_buf)
 601                         return -ENOMEM;
 602                 curl_buf->session = session;
 603
 604                 curl = curl_init();
 605                 if (!curl)
 606                         return -EINVAL;
 607
 608                 if (!session->hosturl)
 609                         session->hosturl = strdup(twitter_host);
 610
 611                 switch (session->action) {
 612                 case ACTION_UPDATE:
 613                         snprintf(user_password, sizeof(user_password), "%s:%s",
 614                                  session->account, session->password);
 615                         snprintf(data, sizeof(data), "status=\"%s\"",
 616                                  session->tweet);
 617                         curl_formadd(&formpost, &lastptr,
 618                                      CURLFORM_COPYNAME, "status",
 619                                      CURLFORM_COPYCONTENTS, session->tweet,
 620                                      CURLFORM_END);
 621
 622                         curl_formadd(&formpost, &lastptr,
 623                                      CURLFORM_COPYNAME, "source",
 624                                      CURLFORM_COPYCONTENTS, "bti",
 625                                      CURLFORM_END);
 626
 627                         if (session->replyto)
 628                                 curl_formadd(&formpost, &lastptr,
 629                                              CURLFORM_COPYNAME, "in_reply_to_status_id",
 630                                              CURLFORM_COPYCONTENTS, session->replyto,
 631                                              CURLFORM_END);
 632
 633                         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 634                         slist = curl_slist_append(slist, "Expect:");
 635                         curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
 636
 637                         sprintf(endpoint, "%s%s", session->hosturl, update_uri);
 638                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 639                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 640                         break;
 641
 642                 case ACTION_FRIENDS:
 643                         snprintf(user_password, sizeof(user_password), "%s:%s",
 644                                  session->account, session->password);
 645                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 646                                         friends_uri, session->page);
 647                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 648                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 649                         break;
 650
 651                 case ACTION_USER:
 652                         sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
 653                                 user_uri, session->user, session->page);
 654                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 655                         break;
 656
 657                 case ACTION_REPLIES:
 658                         snprintf(user_password, sizeof(user_password), "%s:%s",
 659                                  session->account, session->password);
 660                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 661                                 replies_uri, session->page);
 662                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 663                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 664                         break;
 665
 666                 case ACTION_PUBLIC:
 667                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 668                                 public_uri, session->page);
 669                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 670                         break;
 671
 672                 case ACTION_GROUP:
 673                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 674                                 session->hosturl, group_uri, session->group,
 675                                 session->page);
 676                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 677                         break;
 678
 679                 default:
 680                         break;
 681                 }
 682
 683                 if (session->proxy)
 684                         curl_easy_setopt(curl, CURLOPT_PROXY, session->proxy);
 685
 686                 if (debug)
 687                         curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
 688
 689                 dbg("user_password = %s\n", user_password);
 690                 dbg("data = %s\n", data);
 691                 dbg("proxy = %s\n", session->proxy);
 692
 693                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
 694                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl_buf);
 695                 if (!session->dry_run) {
 696                         res = curl_easy_perform(curl);
 697                         if (res && !session->background) {
 698                                 fprintf(stderr, "error(%d) trying to perform "
 699                                                 "operation\n", res);
 700                                 return -EINVAL;
 701                         }
 702                 }
 703
 704                 curl_easy_cleanup(curl);
 705                 if (session->action == ACTION_UPDATE)
 706                         curl_formfree(formpost);
 707                 bti_curl_buffer_free(curl_buf);
 708         } else {
 709                 switch (session->action) {
 710                 case ACTION_UPDATE:
 711                         escaped_tweet = oauth_url_escape(session->tweet);
 712                         if (session->replyto) {
 713                                 sprintf(endpoint,
 714                                         "%s%s?status=%s&in_reply_to_status_id=%s",
 715                                         session->hosturl, update_uri,
 716                                         escaped_tweet, session->replyto);
 717                         } else {
 718                                 sprintf(endpoint, "%s%s?status=%s",
 719                                         session->hosturl, update_uri,
 720                                         escaped_tweet);
 721                         }
 722
 723                         is_post = 1;
 724                         break;
 725                 case ACTION_USER:
 726                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 727                                 session->hosturl, user_uri, session->user,
 728                                 session->page);
 729                         break;
 730                 case ACTION_REPLIES:
 731                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 732                                 mentions_uri, session->page);
 733                         break;
 734                 case ACTION_PUBLIC:
 735                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 736                                 public_uri, session->page);
 737                         break;
 738                 case ACTION_GROUP:
 739                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 740                                 session->hosturl, group_uri, session->group,
 741                                 session->page);
 742                         break;
 743                 case ACTION_FRIENDS:
 744                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 745                                 friends_uri, session->page);
 746                         break;
 747                 case ACTION_RETWEET:
 748                         sprintf(endpoint, "%s%s%s.xml", session->hosturl,
 749                                 retweet_uri, session->retweet);
 750                         is_post = 1;
 751                         break;
 752                 default:
 753                         break;
 754                 }
 755
 756                 dbg("%s\n", endpoint);
 757                 if (!session->dry_run) {
 758                         if (is_post) {
 759                                 req_url = oauth_sign_url2(endpoint, &postarg, OA_HMAC,
 760                                                           NULL, session->consumer_key,
 761                                                           session->consumer_secret,
 762                                                           session->access_token_key,
 763                                                           session->access_token_secret);
 764                                 reply = oauth_http_post(req_url, postarg);
 765                         } else {
 766                                 req_url = oauth_sign_url2(endpoint, NULL, OA_HMAC, NULL,
 767                                                           session->consumer_key,
 768                                                           session->consumer_secret,
 769                                                           session->access_token_key,
 770                                                           session->access_token_secret);
 771                                 reply = oauth_http_get(req_url, postarg);
 772                         }
 773
 774                         dbg("%s\n", req_url);
 775                         dbg("%s\n", reply);
 776                         if (req_url)
 777                                 free(req_url);
 778                 }
 779
 780                 if ((session->action != ACTION_UPDATE) &&
 781                                 (session->action != ACTION_RETWEET))
 782                         parse_timeline(reply, session);
 783         }
 784         return 0;
 785 }
 786
 787 static void parse_configfile(struct session *session)
 788 {
 789         FILE *config_file;
 790         char *line = NULL;
 791         size_t len = 0;
 792         char *account = NULL;
 793         char *password = NULL;
 794         char *consumer_key = NULL;
 795         char *consumer_secret = NULL;
 796         char *access_token_key = NULL;
 797         char *access_token_secret = NULL;
 798         char *host = NULL;
 799         char *proxy = NULL;
 800         char *logfile = NULL;
 801         char *action = NULL;
 802         char *user = NULL;
 803         char *replyto = NULL;
 804         char *retweet = NULL;
 805         int shrink_urls = 0;
 806
 807         config_file = fopen(session->configfile, "r");
 808
 809         /* No error if file does not exist or is unreadable.  */
 810         if (config_file == NULL)
 811                 return;
 812
 813         do {
 814                 ssize_t n = getline(&line, &len, config_file);
 815                 if (n < 0)
 816                         break;
 817                 if (line[n - 1] == '\n')
 818                         line[n - 1] = '\0';
 819                 /* Parse file.  Format is the usual value pairs:
 820                    account=name
 821                    passwort=value
 822                    # is a comment character
 823                 */
 824                 *strchrnul(line, '#') = '\0';
 825                 char *c = line;
 826                 while (isspace(*c))
 827                         c++;
 828                 /* Ignore blank lines.  */
 829                 if (c[0] == '\0')
 830                         continue;
 831
 832                 if (!strncasecmp(c, "account", 7) && (c[7] == '=')) {
 833                         c += 8;
 834                         if (c[0] != '\0')
 835                                 account = strdup(c);
 836                 } else if (!strncasecmp(c, "password", 8) &&
 837                            (c[8] == '=')) {
 838                         c += 9;
 839                         if (c[0] != '\0')
 840                                 password = strdup(c);
 841                 } else if (!strncasecmp(c, "consumer_key", 12) &&
 842                            (c[12] == '=')) {
 843                         c += 13;
 844                         if (c[0] != '\0')
 845                                 consumer_key = strdup(c);
 846                 } else if (!strncasecmp(c, "consumer_secret", 15) &&
 847                            (c[15] == '=')) {
 848                         c += 16;
 849                         if (c[0] != '\0')
 850                                 consumer_secret = strdup(c);
 851                 } else if (!strncasecmp(c, "access_token_key", 16) &&
 852                            (c[16] == '=')) {
 853                         c += 17;
 854                         if (c[0] != '\0')
 855                                 access_token_key = strdup(c);
 856                 } else if (!strncasecmp(c, "access_token_secret", 19) &&
 857                            (c[19] == '=')) {
 858                         c += 20;
 859                         if (c[0] != '\0')
 860                                 access_token_secret = strdup(c);
 861                 } else if (!strncasecmp(c, "host", 4) &&
 862                            (c[4] == '=')) {
 863                         c += 5;
 864                         if (c[0] != '\0')
 865                                 host = strdup(c);
 866                 } else if (!strncasecmp(c, "proxy", 5) &&
 867                            (c[5] == '=')) {
 868                         c += 6;
 869                         if (c[0] != '\0')
 870                                 proxy = strdup(c);
 871                 } else if (!strncasecmp(c, "logfile", 7) &&
 872                            (c[7] == '=')) {
 873                         c += 8;
 874                         if (c[0] != '\0')
 875                                 logfile = strdup(c);
 876                 } else if (!strncasecmp(c, "replyto", 7) &&
 877                            (c[7] == '=')) {
 878                         c += 8;
 879                         if (c[0] != '\0')
 880                                 replyto = strdup(c);
 881                 } else if (!strncasecmp(c, "action", 6) &&
 882                            (c[6] == '=')) {
 883                         c += 7;
 884                         if (c[0] != '\0')
 885                                 action = strdup(c);
 886                 } else if (!strncasecmp(c, "user", 4) &&
 887                                 (c[4] == '=')) {
 888                         c += 5;
 889                         if (c[0] != '\0')
 890                                 user = strdup(c);
 891                 } else if (!strncasecmp(c, "shrink-urls", 11) &&
 892                                 (c[11] == '=')) {
 893                         c += 12;
 894                         if (!strncasecmp(c, "true", 4) ||
 895                                         !strncasecmp(c, "yes", 3))
 896                                 shrink_urls = 1;
 897                 } else if (!strncasecmp(c, "verbose", 7) &&
 898                                 (c[7] == '=')) {
 899                         c += 8;
 900                         if (!strncasecmp(c, "true", 4) ||
 901                                         !strncasecmp(c, "yes", 3))
 902                                 session->verbose = 1;
 903                 } else if (!strncasecmp(c,"retweet", 7) &&
 904                                 (c[7] == '=')) {
 905                         c += 8;
 906                         if (c[0] != '\0')
 907                                 retweet = strdup(c);
 908                 }
 909         } while (!feof(config_file));
 910
 911         if (password)
 912                 session->password = password;
 913         if (account)
 914                 session->account = account;
 915         if (consumer_key)
 916                 session->consumer_key = consumer_key;
 917         if (consumer_secret)
 918                 session->consumer_secret = consumer_secret;
 919         if (access_token_key)
 920                 session->access_token_key = access_token_key;
 921         if (access_token_secret)
 922                 session->access_token_secret = access_token_secret;
 923         if (host) {
 924                 if (strcasecmp(host, "twitter") == 0) {
 925                         session->host = HOST_TWITTER;
 926                         session->hosturl = strdup(twitter_host);
 927                         session->hostname = strdup(twitter_name);
 928                 } else if (strcasecmp(host, "identica") == 0) {
 929                         session->host = HOST_IDENTICA;
 930                         session->hosturl = strdup(identica_host);
 931                         session->hostname = strdup(identica_name);
 932                 } else {
 933                         session->host = HOST_CUSTOM;
 934                         session->hosturl = strdup(host);
 935                         session->hostname = strdup(host);
 936                 }
 937                 free(host);
 938         }
 939         if (proxy) {
 940                 if (session->proxy)
 941                         free(session->proxy);
 942                 session->proxy = proxy;
 943         }
 944         if (logfile)
 945                 session->logfile = logfile;
 946         if (replyto)
 947                 session->replyto = replyto;
 948         if (retweet)
 949                 session->retweet = retweet;
 950         if (action) {
 951                 if (strcasecmp(action, "update") == 0)
 952                         session->action = ACTION_UPDATE;
 953                 else if (strcasecmp(action, "friends") == 0)
 954                         session->action = ACTION_FRIENDS;
 955                 else if (strcasecmp(action, "user") == 0)
 956                         session->action = ACTION_USER;
 957                 else if (strcasecmp(action, "replies") == 0)
 958                         session->action = ACTION_REPLIES;
 959                 else if (strcasecmp(action, "public") == 0)
 960                         session->action = ACTION_PUBLIC;
 961                 else if (strcasecmp(action, "group") == 0)
 962                         session->action = ACTION_GROUP;
 963                 else
 964                         session->action = ACTION_UNKNOWN;
 965                 free(action);
 966         }
 967         if (user)
 968                 session->user = user;
 969         session->shrink_urls = shrink_urls;
 970
 971         /* Free buffer and close file.  */
 972         free(line);
 973         fclose(config_file);
 974 }
 975
 976 static void log_session(struct session *session, int retval)
 977 {
 978         FILE *log_file;
 979         char *filename;
 980
 981         /* Only log something if we have a log file set */
 982         if (!session->logfile)
 983                 return;
 984
 985         filename = alloca(strlen(session->homedir) +
 986                           strlen(session->logfile) + 3);
 987
 988         sprintf(filename, "%s/%s", session->homedir, session->logfile);
 989
 990         log_file = fopen(filename, "a+");
 991         if (log_file == NULL)
 992                 return;
 993
 994         switch (session->action) {
 995         case ACTION_UPDATE:
 996                 if (retval)
 997                         fprintf(log_file, "%s: host=%s tweet failed\n",
 998                                 session->time, session->hostname);
 999                 else
1000                         fprintf(log_file, "%s: host=%s tweet=%s\n",
1001                                 session->time, session->hostname,
1002                                 session->tweet);
1003                 break;
1004         case ACTION_FRIENDS:
1005                 fprintf(log_file, "%s: host=%s retrieving friends timeline\n",
1006                         session->time, session->hostname);
1007                 break;
1008         case ACTION_USER:
1009                 fprintf(log_file, "%s: host=%s retrieving %s's timeline\n",
1010                         session->time, session->hostname, session->user);
1011                 break;
1012         case ACTION_REPLIES:
1013                 fprintf(log_file, "%s: host=%s retrieving replies\n",
1014                         session->time, session->hostname);
1015                 break;
1016         case ACTION_PUBLIC:
1017                 fprintf(log_file, "%s: host=%s retrieving public timeline\n",
1018                         session->time, session->hostname);
1019                 break;
1020         case ACTION_GROUP:
1021                 fprintf(log_file, "%s: host=%s retrieving group timeline\n",
1022                         session->time, session->hostname);
1023                 break;
1024         default:
1025                 break;
1026         }
1027
1028         fclose(log_file);
1029 }
1030
1031 static char *get_string_from_stdin(void)
1032 {
1033         char *temp;
1034         char *string;
1035
1036         string = zalloc(1000);
1037         if (!string)
1038                 return NULL;
1039
1040         if (!fgets(string, 999, stdin))
1041                 return NULL;
1042         temp = strchr(string, '\n');
1043         if (temp)
1044                 *temp = '\0';
1045         return string;
1046 }
1047
1048 static void read_password(char *buf, size_t len, char *host)
1049 {
1050         char pwd[80];
1051         int retval;
1052         struct termios old;
1053         struct termios tp;
1054
1055         tcgetattr(0, &tp);
1056         old = tp;
1057
1058         tp.c_lflag &= (~ECHO);
1059         tcsetattr(0, TCSANOW, &tp);
1060
1061         fprintf(stdout, "Enter password for %s: ", host);
1062         fflush(stdout);
1063         tcflow(0, TCOOFF);
1064         retval = scanf("%79s", pwd);
1065         tcflow(0, TCOON);
1066         fprintf(stdout, "\n");
1067
1068         tcsetattr(0, TCSANOW, &old);
1069
1070         strncpy(buf, pwd, len);
1071         buf[len-1] = '\0';
1072 }
1073
1074 static int find_urls(const char *tweet, int **pranges)
1075 {
1076         /*
1077          * magic obtained from
1078          * http://www.geekpedia.com/KB65_How-to-validate-an-URL-using-RegEx-in-Csharp.html
1079          */
1080         static const char *re_magic =
1081                 "(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)/{1,3}"
1082                 "[0-9a-zA-Z;/~?:@&=+$\\.\\-_'()%]+)"
1083                 "(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?";
1084         pcre *re;
1085         const char *errptr;
1086         int erroffset;
1087         int ovector[10] = {0,};
1088         const size_t ovsize = sizeof(ovector)/sizeof(*ovector);
1089         int startoffset, tweetlen;
1090         int i, rc;
1091         int rbound = 10;
1092         int rcount = 0;
1093         int *ranges = malloc(sizeof(int) * rbound);
1094
1095         re = pcre_compile(re_magic,
1096                         PCRE_NO_AUTO_CAPTURE,
1097                         &errptr, &erroffset, NULL);
1098         if (!re) {
1099                 fprintf(stderr, "pcre_compile @%u: %s\n", erroffset, errptr);
1100                 exit(1);
1101         }
1102
1103         tweetlen = strlen(tweet);
1104         for (startoffset = 0; startoffset < tweetlen; ) {
1105
1106                 rc = pcre_exec(re, NULL, tweet, strlen(tweet), startoffset, 0,
1107                                 ovector, ovsize);
1108                 if (rc == PCRE_ERROR_NOMATCH)
1109                         break;
1110
1111                 if (rc < 0) {
1112                         fprintf(stderr, "pcre_exec @%u: %s\n",
1113                                 erroffset, errptr);
1114                         exit(1);
1115                 }
1116
1117                 for (i = 0; i < rc; i += 2) {
1118                         if ((rcount+2) == rbound) {
1119                                 rbound *= 2;
1120                                 ranges = realloc(ranges, sizeof(int) * rbound);
1121                         }
1122
1123                         ranges[rcount++] = ovector[i];
1124                         ranges[rcount++] = ovector[i+1];
1125                 }
1126
1127                 startoffset = ovector[1];
1128         }
1129
1130         pcre_free(re);
1131
1132         *pranges = ranges;
1133         return rcount;
1134 }
1135
1136 /**
1137  * bidirectional popen() call
1138  *
1139  * @param rwepipe - int array of size three
1140  * @param exe - program to run
1141  * @param argv - argument list
1142  * @return pid or -1 on error
1143  *
1144  * The caller passes in an array of three integers (rwepipe), on successful
1145  * execution it can then write to element 0 (stdin of exe), and read from
1146  * element 1 (stdout) and 2 (stderr).
1147  */
1148 static int popenRWE(int *rwepipe, const char *exe, const char *const argv[])
1149 {
1150         int in[2];
1151         int out[2];
1152         int err[2];
1153         int pid;
1154         int rc;
1155
1156         rc = pipe(in);
1157         if (rc < 0)
1158                 goto error_in;
1159
1160         rc = pipe(out);
1161         if (rc < 0)
1162                 goto error_out;
1163
1164         rc = pipe(err);
1165         if (rc < 0)
1166                 goto error_err;
1167
1168         pid = fork();
1169         if (pid > 0) {
1170                 /* parent */
1171                 close(in[0]);
1172                 close(out[1]);
1173                 close(err[1]);
1174                 rwepipe[0] = in[1];
1175                 rwepipe[1] = out[0];
1176                 rwepipe[2] = err[0];
1177                 return pid;
1178         } else if (pid == 0) {
1179                 /* child */
1180                 close(in[1]);
1181                 close(out[0]);
1182                 close(err[0]);
1183                 close(0);
1184                 rc = dup(in[0]);
1185                 close(1);
1186                 rc = dup(out[1]);
1187                 close(2);
1188                 rc = dup(err[1]);
1189
1190                 execvp(exe, (char **)argv);
1191                 exit(1);
1192         } else
1193                 goto error_fork;
1194
1195         return pid;
1196
1197 error_fork:
1198         close(err[0]);
1199         close(err[1]);
1200 error_err:
1201         close(out[0]);
1202         close(out[1]);
1203 error_out:
1204         close(in[0]);
1205         close(in[1]);
1206 error_in:
1207         return -1;
1208 }
1209
1210 static int pcloseRWE(int pid, int *rwepipe)
1211 {
1212         int rc, status;
1213         close(rwepipe[0]);
1214         close(rwepipe[1]);
1215         close(rwepipe[2]);
1216         rc = waitpid(pid, &status, 0);
1217         return status;
1218 }
1219
1220 static char *shrink_one_url(int *rwepipe, char *big)
1221 {
1222         int biglen = strlen(big);
1223         char *small;
1224         int smalllen;
1225         int rc;
1226
1227         rc = dprintf(rwepipe[0], "%s\n", big);
1228         if (rc < 0)
1229                 return big;
1230
1231         smalllen = biglen + 128;
1232         small = malloc(smalllen);
1233         if (!small)
1234                 return big;
1235
1236         rc = read(rwepipe[1], small, smalllen);
1237         if (rc < 0 || rc > biglen)
1238                 goto error_free_small;
1239
1240         if (strncmp(small, "http://", 7))
1241                 goto error_free_small;
1242
1243         smalllen = rc;
1244         while (smalllen && isspace(small[smalllen-1]))
1245                         small[--smalllen] = 0;
1246
1247         free(big);
1248         return small;
1249
1250 error_free_small:
1251         free(small);
1252         return big;
1253 }
1254
1255 static char *shrink_urls(char *text)
1256 {
1257         int *ranges;
1258         int rcount;
1259         int i;
1260         int inofs = 0;
1261         int outofs = 0;
1262         const char *const shrink_args[] = {
1263                 "bti-shrink-urls",
1264                 NULL
1265         };
1266         int shrink_pid;
1267         int shrink_pipe[3];
1268         int inlen = strlen(text);
1269
1270         dbg("before len=%u\n", inlen);
1271
1272         shrink_pid = popenRWE(shrink_pipe, shrink_args[0], shrink_args);
1273         if (shrink_pid < 0)
1274                 return text;
1275
1276         rcount = find_urls(text, &ranges);
1277         if (!rcount)
1278                 return text;
1279
1280         for (i = 0; i < rcount; i += 2) {
1281                 int url_start = ranges[i];
1282                 int url_end = ranges[i+1];
1283                 int long_url_len = url_end - url_start;
1284                 char *url = strndup(text + url_start, long_url_len);
1285                 int short_url_len;
1286                 int not_url_len = url_start - inofs;
1287
1288                 dbg("long  url[%u]: %s\n", long_url_len, url);
1289                 url = shrink_one_url(shrink_pipe, url);
1290                 short_url_len = url ? strlen(url) : 0;
1291                 dbg("short url[%u]: %s\n", short_url_len, url);
1292
1293                 if (!url || short_url_len >= long_url_len) {
1294                         /* The short url ended up being too long
1295                          * or unavailable */
1296                         if (inofs) {
1297                                 strncpy(text + outofs, text + inofs,
1298                                                 not_url_len + long_url_len);
1299                         }
1300                         inofs += not_url_len + long_url_len;
1301                         outofs += not_url_len + long_url_len;
1302
1303                 } else {
1304                         /* copy the unmodified block */
1305                         strncpy(text + outofs, text + inofs, not_url_len);
1306                         inofs += not_url_len;
1307                         outofs += not_url_len;
1308
1309                         /* copy the new url */
1310                         strncpy(text + outofs, url, short_url_len);
1311                         inofs += long_url_len;
1312                         outofs += short_url_len;
1313                 }
1314
1315                 free(url);
1316         }
1317
1318         /* copy the last block after the last match */
1319         if (inofs) {
1320                 int tail = inlen - inofs;
1321                 if (tail) {
1322                         strncpy(text + outofs, text + inofs, tail);
1323                         outofs += tail;
1324                 }
1325         }
1326
1327         free(ranges);
1328
1329         (void)pcloseRWE(shrink_pid, shrink_pipe);
1330
1331         text[outofs] = 0;
1332         dbg("after len=%u\n", outofs);
1333         return text;
1334 }
1335
1336 int main(int argc, char *argv[], char *envp[])
1337 {
1338         static const struct option options[] = {
1339                 { "debug", 0, NULL, 'd' },
1340                 { "verbose", 0, NULL, 'V' },
1341                 { "account", 1, NULL, 'a' },
1342                 { "password", 1, NULL, 'p' },
1343                 { "host", 1, NULL, 'H' },
1344                 { "proxy", 1, NULL, 'P' },
1345                 { "action", 1, NULL, 'A' },
1346                 { "user", 1, NULL, 'u' },
1347                 { "group", 1, NULL, 'G' },
1348                 { "logfile", 1, NULL, 'L' },
1349                 { "shrink-urls", 0, NULL, 's' },
1350                 { "help", 0, NULL, 'h' },
1351                 { "bash", 0, NULL, 'b' },
1352                 { "background", 0, NULL, 'B' },
1353                 { "dry-run", 0, NULL, 'n' },
1354                 { "page", 1, NULL, 'g' },
1355                 { "version", 0, NULL, 'v' },
1356                 { "config", 1, NULL, 'c' },
1357                 { "replyto", 1, NULL, 'r' },
1358                 { "retweet", 1, NULL, 'w' },
1359                 { }
1360         };
1361         struct session *session;
1362         pid_t child;
1363         char *tweet;
1364         char *retweet;
1365         static char password[80];
1366         int retval = 0;
1367         int option;
1368         char *http_proxy;
1369         time_t t;
1370         int page_nr;
1371
1372         debug = 0;
1373
1374         session = session_alloc();
1375         if (!session) {
1376                 fprintf(stderr, "no more memory...\n");
1377                 return -1;
1378         }
1379
1380         /* get the current time so that we can log it later */
1381         time(&t);
1382         session->time = strdup(ctime(&t));
1383         session->time[strlen(session->time)-1] = 0x00;
1384
1385         /* Get the home directory so we can try to find a config file */
1386         session->homedir = strdup(getenv("HOME"));
1387
1388         /* set up a default config file location (traditionally ~/.bti) */
1389         session->configfile = zalloc(strlen(session->homedir) + 7);
1390         sprintf(session->configfile, "%s/.bti", session->homedir);
1391
1392         /* Set environment variables first, before reading command line options
1393          * or config file values. */
1394         http_proxy = getenv("http_proxy");
1395         if (http_proxy) {
1396                 if (session->proxy)
1397                         free(session->proxy);
1398                 session->proxy = strdup(http_proxy);
1399                 dbg("http_proxy = %s\n", session->proxy);
1400         }
1401
1402         parse_configfile(session);
1403
1404         while (1) {
1405                 option = getopt_long_only(argc, argv,
1406                                           "dp:P:H:a:A:u:c:hg:G:sr:nVv",
1407                                           options, NULL);
1408                 if (option == -1)
1409                         break;
1410                 switch (option) {
1411                 case 'd':
1412                         debug = 1;
1413                         break;
1414                 case 'V':
1415                         session->verbose = 1;
1416                         break;
1417                 case 'a':
1418                         if (session->account)
1419                                 free(session->account);
1420                         session->account = strdup(optarg);
1421                         dbg("account = %s\n", session->account);
1422                         break;
1423                 case 'g':
1424                         page_nr = atoi(optarg);
1425                         dbg("page = %d\n", page_nr);
1426                         session->page = page_nr;
1427                         break;
1428                 case 'r':
1429                         session->replyto = strdup(optarg);
1430                         dbg("in_reply_to_status_id = %s\n", session->replyto);
1431                         break;
1432                 case 'w':
1433                         session->retweet = strdup(optarg);
1434                         dbg("Retweet ID = %s\n", session->retweet);
1435                         break;
1436                 case 'p':
1437                         if (session->password)
1438                                 free(session->password);
1439                         session->password = strdup(optarg);
1440                         dbg("password = %s\n", session->password);
1441                         break;
1442                 case 'P':
1443                         if (session->proxy)
1444                                 free(session->proxy);
1445                         session->proxy = strdup(optarg);
1446                         dbg("proxy = %s\n", session->proxy);
1447                         break;
1448                 case 'A':
1449                         if (strcasecmp(optarg, "update") == 0)
1450                                 session->action = ACTION_UPDATE;
1451                         else if (strcasecmp(optarg, "friends") == 0)
1452                                 session->action = ACTION_FRIENDS;
1453                         else if (strcasecmp(optarg, "user") == 0)
1454                                 session->action = ACTION_USER;
1455                         else if (strcasecmp(optarg, "replies") == 0)
1456                                 session->action = ACTION_REPLIES;
1457                         else if (strcasecmp(optarg, "public") == 0)
1458                                 session->action = ACTION_PUBLIC;
1459                         else if (strcasecmp(optarg, "group") == 0)
1460                                 session->action = ACTION_GROUP;
1461                         else if (strcasecmp(optarg,"retweet") == 0)
1462                                 session->action = ACTION_RETWEET;
1463                         else
1464                                 session->action = ACTION_UNKNOWN;
1465                         dbg("action = %d\n", session->action);
1466                         break;
1467                 case 'u':
1468                         if (session->user)
1469                                 free(session->user);
1470                         session->user = strdup(optarg);
1471                         dbg("user = %s\n", session->user);
1472                         break;
1473
1474                 case 'G':
1475                         if (session->group)
1476                                 free(session->group);
1477                         session->group = strdup(optarg);
1478                         dbg("group = %s\n", session->group);
1479                         break;
1480                 case 'L':
1481                         if (session->logfile)
1482                                 free(session->logfile);
1483                         session->logfile = strdup(optarg);
1484                         dbg("logfile = %s\n", session->logfile);
1485                         break;
1486                 case 's':
1487                         session->shrink_urls = 1;
1488                         break;
1489                 case 'H':
1490                         if (session->hosturl)
1491                                 free(session->hosturl);
1492                         if (session->hostname)
1493                                 free(session->hostname);
1494                         if (strcasecmp(optarg, "twitter") == 0) {
1495                                 session->host = HOST_TWITTER;
1496                                 session->hosturl = strdup(twitter_host);
1497                                 session->hostname = strdup(twitter_name);
1498                         } else if (strcasecmp(optarg, "identica") == 0) {
1499                                 session->host = HOST_IDENTICA;
1500                                 session->hosturl = strdup(identica_host);
1501                                 session->hostname = strdup(identica_name);
1502                         } else {
1503                                 session->host = HOST_CUSTOM;
1504                                 session->hosturl = strdup(optarg);
1505                                 session->hostname = strdup(optarg);
1506                         }
1507                         dbg("host = %d\n", session->host);
1508                         break;
1509                 case 'b':
1510                         session->bash = 1;
1511                         /* fall-through intended */
1512                 case 'B':
1513                         session->background = 1;
1514                         break;
1515                 case 'c':
1516                         if (session->configfile)
1517                                 free(session->configfile);
1518                         session->configfile = strdup(optarg);
1519                         dbg("configfile = %s\n", session->configfile);
1520
1521                         /*
1522                          * read the config file now.  Yes, this could override
1523                          * previously set options from the command line, but
1524                          * the user asked for it...
1525                          */
1526                         parse_configfile(session);
1527                         break;
1528                 case 'h':
1529                         display_help();
1530                         goto exit;
1531                 case 'n':
1532                         session->dry_run = 1;
1533                         break;
1534                 case 'v':
1535                         display_version();
1536                         goto exit;
1537                 default:
1538                         display_help();
1539                         goto exit;
1540                 }
1541         }
1542
1543         session_readline_init(session);
1544         /*
1545          * Show the version to make it easier to determine what
1546          * is going on here
1547          */
1548         if (debug)
1549                 display_version();
1550
1551         if (session->host == HOST_TWITTER) {
1552                 if (!session->consumer_key || !session->consumer_secret) {
1553                         if (session->action == ACTION_USER ||
1554                                         session->action == ACTION_PUBLIC) {
1555                                 /* Some actions may still work without authentication */
1556                                 session->guest = 1;
1557                         } else {
1558                                 fprintf(stderr,
1559                                                 "Twitter no longer supports HTTP basic authentication.\n"
1560                                                 "Both consumer key, and consumer secret are required"
1561                                                 " for bti in order to behave as an OAuth consumer.\n");
1562                                 goto exit;
1563                         }
1564                 }
1565                 if (session->action == ACTION_GROUP) {
1566                         fprintf(stderr, "Groups only work in Identi.ca.\n");
1567                         goto exit;
1568                 }
1569         } else {
1570                 if (!session->consumer_key || !session->consumer_secret)
1571                         session->no_oauth = 1;
1572         }
1573
1574         if (session->no_oauth) {
1575                 if (!session->account) {
1576                         fprintf(stdout, "Enter account for %s: ",
1577                                 session->hostname);
1578                         session->account = session->readline(NULL);
1579                 }
1580                 if (!session->password) {
1581                         read_password(password, sizeof(password),
1582                                       session->hostname);
1583                         session->password = strdup(password);
1584                 }
1585         } else if (!session->guest) {
1586                 if (!session->access_token_key ||
1587                     !session->access_token_secret) {
1588                         request_access_token(session);
1589                         goto exit;
1590                 }
1591         }
1592
1593         if (session->action == ACTION_UNKNOWN) {
1594                 fprintf(stderr, "Unknown action, valid actions are:\n"
1595                         "'update', 'friends', 'public', 'replies', 'group' or 'user'.\n");
1596                 goto exit;
1597         }
1598
1599         if (session->action == ACTION_GROUP && !session->group) {
1600                 fprintf(stdout, "Enter group name: ");
1601                 session->group = session->readline(NULL);
1602         }
1603
1604         if (session->action == ACTION_RETWEET) {
1605                 fprintf(stdout, "Status ID to retweet: ");
1606                 retweet = get_string_from_stdin();
1607
1608                 if (!retweet || strlen(retweet) == 0) {
1609                         dbg("no retweet?\n");
1610                         return -1;
1611                 }
1612
1613                 session->retweet = zalloc(strlen(retweet) + 10);
1614                 sprintf(session->retweet,"%s", retweet);
1615                 free(retweet);
1616                 dbg("retweet ID = %s\n", session->retweet);
1617         }
1618
1619         if (session->action == ACTION_UPDATE) {
1620                 if (session->background || !session->interactive)
1621                         tweet = get_string_from_stdin();
1622                 else
1623                         tweet = session->readline("tweet: ");
1624                 if (!tweet || strlen(tweet) == 0) {
1625                         dbg("no tweet?\n");
1626                         return -1;
1627                 }
1628
1629                 if (session->shrink_urls)
1630                         tweet = shrink_urls(tweet);
1631
1632                 session->tweet = zalloc(strlen(tweet) + 10);
1633                 if (session->bash)
1634                         sprintf(session->tweet, "%c %s",
1635                                 getuid() ? '$' : '#', tweet);
1636                 else
1637                         sprintf(session->tweet, "%s", tweet);
1638
1639                 free(tweet);
1640                 dbg("tweet = %s\n", session->tweet);
1641         }
1642
1643         if (session->page == 0)
1644                 session->page = 1;
1645         dbg("config file = %s\n", session->configfile);
1646         dbg("host = %d\n", session->host);
1647         dbg("action = %d\n", session->action);
1648
1649         /* fork ourself so that the main shell can get on
1650          * with it's life as we try to connect and handle everything
1651          */
1652         if (session->background) {
1653                 child = fork();
1654                 if (child) {
1655                         dbg("child is %d\n", child);
1656                         exit(0);
1657                 }
1658         }
1659
1660         retval = send_request(session);
1661         if (retval && !session->background)
1662                 fprintf(stderr, "operation failed\n");
1663
1664         log_session(session, retval);
1665 exit:
1666         session_readline_cleanup(session);
1667         session_free(session);
1668         return retval;;
1669 }