bti.c

   1 /*
   2  * Copyright (C) 2008-2011 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 #include "bti.h"
  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 int debug;
  56
  57 static void display_help(void)
  58 {
  59         fprintf(stdout, "bti - send tweet to twitter or identi.ca\n"
  60                 "Version: %s\n"
  61                 "Usage:\n"
  62                 "  bti [options]\n"
  63                 "options are:\n"
  64                 "  --account accountname\n"
  65                 "  --password password\n"
  66                 "  --action action\n"
  67                 "    ('update', 'friends', 'public', 'replies', or 'user')\n"
  68                 "  --user screenname\n"
  69                 "  --group groupname\n"
  70                 "  --proxy PROXY:PORT\n"
  71                 "  --host HOST\n"
  72                 "  --logfile logfile\n"
  73                 "  --config configfile\n"
  74                 "  --replyto ID\n"
  75                 "  --retweet ID\n"
  76                 "  --shrink-urls\n"
  77                 "  --page PAGENUMBER\n"
  78                 "  --bash\n"
  79                 "  --background\n"
  80                 "  --debug\n"
  81                 "  --verbose\n"
  82                 "  --dry-run\n"
  83                 "  --version\n"
  84                 "  --help\n", VERSION);
  85 }
  86
  87 static void display_version(void)
  88 {
  89         fprintf(stdout, "bti - version %s\n", VERSION);
  90 }
  91
  92 static char *get_string(const char *name)
  93 {
  94         char *temp;
  95         char *string;
  96
  97         string = zalloc(1000);
  98         if (!string)
  99                 exit(1);
 100         if (name != NULL)
 101                 fprintf(stdout, "%s", name);
 102         if (!fgets(string, 999, stdin))
 103                 return NULL;
 104         temp = strchr(string, '\n');
 105         if (temp)
 106                 *temp = '\0';
 107         return string;
 108 }
 109
 110 /*
 111  * Try to get a handle to a readline function from a variety of different
 112  * libraries.  If nothing is present on the system, then fall back to an
 113  * internal one.
 114  *
 115  * Logic originally based off of code in the e2fsutils package in the
 116  * lib/ss/get_readline.c file, which is licensed under the MIT license.
 117  *
 118  * This keeps us from having to relicense the bti codebase if readline
 119  * ever changes its license, as there is no link-time dependancy.
 120  * It is a run-time thing only, and we handle any readline-like library
 121  * in the same manner, making bti not be a derivative work of any
 122  * other program.
 123  */
 124 static void session_readline_init(struct session *session)
 125 {
 126         /* Libraries we will try to use for readline/editline functionality */
 127         const char *libpath = "libreadline.so.6:libreadline.so.5:"
 128                                 "libreadline.so.4:libreadline.so:libedit.so.2:"
 129                                 "libedit.so:libeditline.so.0:libeditline.so";
 130         void *handle = NULL;
 131         char *tmp, *cp, *next;
 132         int (*bind_key)(int, void *);
 133         void (*insert)(void);
 134
 135         /* default to internal function if we can't or won't find anything */
 136         session->readline = get_string;
 137         if (!isatty(0))
 138                 return;
 139         session->interactive = 1;
 140
 141         tmp = malloc(strlen(libpath)+1);
 142         if (!tmp)
 143                 return;
 144         strcpy(tmp, libpath);
 145         for (cp = tmp; cp; cp = next) {
 146                 next = strchr(cp, ':');
 147                 if (next)
 148                         *next++ = 0;
 149                 if (*cp == 0)
 150                         continue;
 151                 handle = dlopen(cp, RTLD_NOW);
 152                 if (handle) {
 153                         dbg("Using %s for readline library\n", cp);
 154                         break;
 155                 }
 156         }
 157         free(tmp);
 158         if (!handle) {
 159                 dbg("No readline library found.\n");
 160                 return;
 161         }
 162
 163         session->readline_handle = handle;
 164         session->readline = (char *(*)(const char *))dlsym(handle, "readline");
 165         if (session->readline == NULL) {
 166                 /* something odd happened, default back to internal stuff */
 167                 session->readline_handle = NULL;
 168                 session->readline = get_string;
 169                 return;
 170         }
 171
 172         /*
 173          * If we found a library, turn off filename expansion
 174          * as that makes no sense from within bti.
 175          */
 176         bind_key = (int (*)(int, void *))dlsym(handle, "rl_bind_key");
 177         insert = (void (*)(void))dlsym(handle, "rl_insert");
 178         if (bind_key && insert)
 179                 bind_key('\t', insert);
 180 }
 181
 182 static void session_readline_cleanup(struct session *session)
 183 {
 184         if (session->readline_handle)
 185                 dlclose(session->readline_handle);
 186 }
 187
 188 static struct session *session_alloc(void)
 189 {
 190         struct session *session;
 191
 192         session = zalloc(sizeof(*session));
 193         if (!session)
 194                 return NULL;
 195         return session;
 196 }
 197
 198 static void session_free(struct session *session)
 199 {
 200         if (!session)
 201                 return;
 202         free(session->retweet);
 203         free(session->replyto);
 204         free(session->password);
 205         free(session->account);
 206         free(session->consumer_key);
 207         free(session->consumer_secret);
 208         free(session->access_token_key);
 209         free(session->access_token_secret);
 210         free(session->tweet);
 211         free(session->proxy);
 212         free(session->time);
 213         free(session->homedir);
 214         free(session->user);
 215         free(session->group);
 216         free(session->hosturl);
 217         free(session->hostname);
 218         free(session->configfile);
 219         free(session);
 220 }
 221
 222 static struct bti_curl_buffer *bti_curl_buffer_alloc(enum action action)
 223 {
 224         struct bti_curl_buffer *buffer;
 225
 226         buffer = zalloc(sizeof(*buffer));
 227         if (!buffer)
 228                 return NULL;
 229
 230         /* start out with a data buffer of 1 byte to
 231          * make the buffer fill logic simpler */
 232         buffer->data = zalloc(1);
 233         if (!buffer->data) {
 234                 free(buffer);
 235                 return NULL;
 236         }
 237         buffer->length = 0;
 238         buffer->action = action;
 239         return buffer;
 240 }
 241
 242 static void bti_curl_buffer_free(struct bti_curl_buffer *buffer)
 243 {
 244         if (!buffer)
 245                 return;
 246         free(buffer->data);
 247         free(buffer);
 248 }
 249
 250 const char twitter_host[]  = "http://api.twitter.com/1/statuses";
 251 const char identica_host[] = "https://identi.ca/api/statuses";
 252 const char twitter_name[]  = "twitter";
 253 const char identica_name[] = "identi.ca";
 254
 255 static const char twitter_request_token_uri[]  = "http://twitter.com/oauth/request_token";
 256 static const char twitter_access_token_uri[]   = "http://twitter.com/oauth/access_token";
 257 static const char twitter_authorize_uri[]      = "http://twitter.com/oauth/authorize?oauth_token=";
 258 static const char identica_request_token_uri[] = "http://identi.ca/api/oauth/request_token?oauth_callback=oob";
 259 static const char identica_access_token_uri[]  = "http://identi.ca/api/oauth/access_token";
 260 static const char identica_authorize_uri[]     = "http://identi.ca/api/oauth/authorize?oauth_token=";
 261
 262 static const char user_uri[]     = "/user_timeline/";
 263 static const char update_uri[]   = "/update.xml";
 264 static const char public_uri[]   = "/public_timeline.xml";
 265 static const char friends_uri[]  = "/friends_timeline.xml";
 266 static const char mentions_uri[] = "/mentions.xml";
 267 static const char replies_uri[]  = "/replies.xml";
 268 static const char retweet_uri[]  = "/retweet/";
 269 static const char group_uri[]    = "/../statusnet/groups/timeline/";
 270
 271 static CURL *curl_init(void)
 272 {
 273         CURL *curl;
 274
 275         curl = curl_easy_init();
 276         if (!curl) {
 277                 fprintf(stderr, "Can not init CURL!\n");
 278                 return NULL;
 279         }
 280         /* some ssl sanity checks on the connection we are making */
 281         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 282         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 283         return curl;
 284 }
 285
 286 /* The final place data is sent to the screen/pty/tty */
 287 static void bti_output_line(struct session *session, xmlChar *user,
 288                             xmlChar *id, xmlChar *created, xmlChar *text)
 289 {
 290         if (session->verbose)
 291                 printf("[%s] {%s} (%.16s) %s\n", user, id, created, text);
 292         else
 293                 printf("[%s] %s\n", user, text);
 294 }
 295
 296 static void parse_statuses(struct session *session,
 297                            xmlDocPtr doc, xmlNodePtr current)
 298 {
 299         xmlChar *text = NULL;
 300         xmlChar *user = NULL;
 301         xmlChar *created = NULL;
 302         xmlChar *id = NULL;
 303         xmlNodePtr userinfo;
 304
 305         current = current->xmlChildrenNode;
 306         while (current != NULL) {
 307                 if (current->type == XML_ELEMENT_NODE) {
 308                         if (!xmlStrcmp(current->name, (const xmlChar *)"created_at"))
 309                                 created = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 310                         if (!xmlStrcmp(current->name, (const xmlChar *)"text"))
 311                                 text = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 312                         if (!xmlStrcmp(current->name, (const xmlChar *)"id"))
 313                                 id = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
 314                         if (!xmlStrcmp(current->name, (const xmlChar *)"user")) {
 315                                 userinfo = current->xmlChildrenNode;
 316                                 while (userinfo != NULL) {
 317                                         if ((!xmlStrcmp(userinfo->name, (const xmlChar *)"screen_name"))) {
 318                                                 if (user)
 319                                                         xmlFree(user);
 320                                                 user = xmlNodeListGetString(doc, userinfo->xmlChildrenNode, 1);
 321                                         }
 322                                         userinfo = userinfo->next;
 323                                 }
 324                         }
 325
 326                         if (user && text && created && id) {
 327                                 bti_output_line(session, user, id, created, text);
 328                                 xmlFree(user);
 329                                 xmlFree(text);
 330                                 xmlFree(created);
 331                                 xmlFree(id);
 332                                 user = NULL;
 333                                 text = NULL;
 334                                 created = NULL;
 335                                 id = NULL;
 336                         }
 337                 }
 338                 current = current->next;
 339         }
 340
 341         return;
 342 }
 343
 344 static void parse_timeline(char *document, struct session *session)
 345 {
 346         xmlDocPtr doc;
 347         xmlNodePtr current;
 348
 349         doc = xmlReadMemory(document, strlen(document), "timeline.xml",
 350                             NULL, XML_PARSE_NOERROR);
 351         if (doc == NULL)
 352                 return;
 353
 354         current = xmlDocGetRootElement(doc);
 355         if (current == NULL) {
 356                 fprintf(stderr, "empty document\n");
 357                 xmlFreeDoc(doc);
 358                 return;
 359         }
 360
 361         if (xmlStrcmp(current->name, (const xmlChar *) "statuses")) {
 362                 fprintf(stderr, "unexpected document type\n");
 363                 xmlFreeDoc(doc);
 364                 return;
 365         }
 366
 367         current = current->xmlChildrenNode;
 368         while (current != NULL) {
 369                 if ((!xmlStrcmp(current->name, (const xmlChar *)"status")))
 370                         parse_statuses(session, doc, current);
 371                 current = current->next;
 372         }
 373         xmlFreeDoc(doc);
 374
 375         return;
 376 }
 377
 378 static size_t curl_callback(void *buffer, size_t size, size_t nmemb,
 379                             void *userp)
 380 {
 381         struct bti_curl_buffer *curl_buf = userp;
 382         size_t buffer_size = size * nmemb;
 383         char *temp;
 384
 385         if ((!buffer) || (!buffer_size) || (!curl_buf))
 386                 return -EINVAL;
 387
 388         /* add to the data we already have */
 389         temp = zalloc(curl_buf->length + buffer_size + 1);
 390         if (!temp)
 391                 return -ENOMEM;
 392
 393         memcpy(temp, curl_buf->data, curl_buf->length);
 394         free(curl_buf->data);
 395         curl_buf->data = temp;
 396         memcpy(&curl_buf->data[curl_buf->length], (char *)buffer, buffer_size);
 397         curl_buf->length += buffer_size;
 398         if (curl_buf->action)
 399                 parse_timeline(curl_buf->data, curl_buf->session);
 400
 401         dbg("%s\n", curl_buf->data);
 402
 403         return buffer_size;
 404 }
 405
 406 static int parse_osp_reply(const char *reply, char **token, char **secret)
 407 {
 408         int rc;
 409         int retval = 1;
 410         char **rv = NULL;
 411         rc = oauth_split_url_parameters(reply, &rv);
 412         qsort(rv, rc, sizeof(char *), oauth_cmpstringp);
 413         if (rc == 2 || rc == 4) {
 414                 if (!strncmp(rv[0], "oauth_token=", 11) &&
 415                     !strncmp(rv[1], "oauth_token_secret=", 18)) {
 416                         if (token)
 417                                 *token = strdup(&(rv[0][12]));
 418                         if (secret)
 419                                 *secret = strdup(&(rv[1][19]));
 420
 421                         retval = 0;
 422                 }
 423         } else if (rc == 3) {
 424                 if (!strncmp(rv[1], "oauth_token=", 11) &&
 425                     !strncmp(rv[2], "oauth_token_secret=", 18)) {
 426                         if (token)
 427                                 *token = strdup(&(rv[1][12]));
 428                         if (secret)
 429                                 *secret = strdup(&(rv[2][19]));
 430
 431                         retval = 0;
 432                 }
 433         }
 434
 435         dbg("token: %s\n", *token);
 436         dbg("secret: %s\n", *secret);
 437
 438         if (rv)
 439                 free(rv);
 440
 441         return retval;
 442 }
 443
 444 static int request_access_token(struct session *session)
 445 {
 446         char *post_params = NULL;
 447         char *request_url = NULL;
 448         char *reply       = NULL;
 449         char *at_key      = NULL;
 450         char *at_secret   = NULL;
 451         char *verifier    = NULL;
 452         char at_uri[90];
 453
 454         if (!session)
 455                 return -EINVAL;
 456
 457         if (session->host == HOST_TWITTER)
 458                 request_url = oauth_sign_url2(
 459                                 twitter_request_token_uri, NULL,
 460                                 OA_HMAC, NULL, session->consumer_key,
 461                                 session->consumer_secret, NULL, NULL);
 462         else if (session->host == HOST_IDENTICA)
 463                 request_url = oauth_sign_url2(
 464                                 identica_request_token_uri, NULL,
 465                                 OA_HMAC, NULL, session->consumer_key,
 466                                 session->consumer_secret, NULL, NULL);
 467         reply = oauth_http_get(request_url, post_params);
 468
 469         if (request_url)
 470                 free(request_url);
 471
 472         if (post_params)
 473                 free(post_params);
 474
 475         if (!reply)
 476                 return 1;
 477
 478         if (parse_osp_reply(reply, &at_key, &at_secret))
 479                 return 1;
 480
 481         free(reply);
 482
 483         fprintf(stdout,
 484                 "Please open the following link in your browser, and "
 485                 "allow 'bti' to access your account. Then paste "
 486                 "back the provided PIN in here.\n");
 487         if (session->host == HOST_TWITTER) {
 488                 fprintf(stdout, "%s%s\nPIN: ", twitter_authorize_uri, at_key);
 489                 verifier = session->readline(NULL);
 490                 sprintf(at_uri, "%s?oauth_verifier=%s",
 491                         twitter_access_token_uri, verifier);
 492         } else if (session->host == HOST_IDENTICA) {
 493                 fprintf(stdout, "%s%s\nPIN: ", identica_authorize_uri, at_key);
 494                 verifier = session->readline(NULL);
 495                 sprintf(at_uri, "%s?oauth_verifier=%s",
 496                         identica_access_token_uri, verifier);
 497         }
 498         request_url = oauth_sign_url2(at_uri, NULL, OA_HMAC, NULL,
 499                                       session->consumer_key,
 500                                       session->consumer_secret,
 501                                       at_key, at_secret);
 502         reply = oauth_http_get(request_url, post_params);
 503
 504         if (!reply)
 505                 return 1;
 506
 507         if (parse_osp_reply(reply, &at_key, &at_secret))
 508                 return 1;
 509
 510         free(reply);
 511
 512         fprintf(stdout,
 513                 "Please put these two lines in your bti "
 514                 "configuration file (~/.bti):\n"
 515                 "access_token_key=%s\n"
 516                 "access_token_secret=%s\n",
 517                 at_key, at_secret);
 518
 519         return 0;
 520 }
 521
 522 static int send_request(struct session *session)
 523 {
 524         char endpoint[500];
 525         char user_password[500];
 526         char data[500];
 527         struct bti_curl_buffer *curl_buf;
 528         CURL *curl = NULL;
 529         CURLcode res;
 530         struct curl_httppost *formpost = NULL;
 531         struct curl_httppost *lastptr = NULL;
 532         struct curl_slist *slist = NULL;
 533         char *req_url = NULL;
 534         char *reply = NULL;
 535         char *postarg = NULL;
 536         char *escaped_tweet = NULL;
 537         int is_post = 0;
 538
 539         if (!session)
 540                 return -EINVAL;
 541
 542         if (!session->hosturl)
 543                 session->hosturl = strdup(twitter_host);
 544
 545         if (session->no_oauth || session->guest) {
 546                 curl_buf = bti_curl_buffer_alloc(session->action);
 547                 if (!curl_buf)
 548                         return -ENOMEM;
 549                 curl_buf->session = session;
 550
 551                 curl = curl_init();
 552                 if (!curl)
 553                         return -EINVAL;
 554
 555                 if (!session->hosturl)
 556                         session->hosturl = strdup(twitter_host);
 557
 558                 switch (session->action) {
 559                 case ACTION_UPDATE:
 560                         snprintf(user_password, sizeof(user_password), "%s:%s",
 561                                  session->account, session->password);
 562                         snprintf(data, sizeof(data), "status=\"%s\"",
 563                                  session->tweet);
 564                         curl_formadd(&formpost, &lastptr,
 565                                      CURLFORM_COPYNAME, "status",
 566                                      CURLFORM_COPYCONTENTS, session->tweet,
 567                                      CURLFORM_END);
 568
 569                         curl_formadd(&formpost, &lastptr,
 570                                      CURLFORM_COPYNAME, "source",
 571                                      CURLFORM_COPYCONTENTS, "bti",
 572                                      CURLFORM_END);
 573
 574                         if (session->replyto)
 575                                 curl_formadd(&formpost, &lastptr,
 576                                              CURLFORM_COPYNAME, "in_reply_to_status_id",
 577                                              CURLFORM_COPYCONTENTS, session->replyto,
 578                                              CURLFORM_END);
 579
 580                         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 581                         slist = curl_slist_append(slist, "Expect:");
 582                         curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
 583
 584                         sprintf(endpoint, "%s%s", session->hosturl, update_uri);
 585                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 586                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 587                         break;
 588
 589                 case ACTION_FRIENDS:
 590                         snprintf(user_password, sizeof(user_password), "%s:%s",
 591                                  session->account, session->password);
 592                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 593                                         friends_uri, session->page);
 594                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 595                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 596                         break;
 597
 598                 case ACTION_USER:
 599                         sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
 600                                 user_uri, session->user, session->page);
 601                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 602                         break;
 603
 604                 case ACTION_REPLIES:
 605                         snprintf(user_password, sizeof(user_password), "%s:%s",
 606                                  session->account, session->password);
 607                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 608                                 replies_uri, session->page);
 609                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 610                         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 611                         break;
 612
 613                 case ACTION_PUBLIC:
 614                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 615                                 public_uri, session->page);
 616                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 617                         break;
 618
 619                 case ACTION_GROUP:
 620                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 621                                 session->hosturl, group_uri, session->group,
 622                                 session->page);
 623                         curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 624                         break;
 625
 626                 default:
 627                         break;
 628                 }
 629
 630                 if (session->proxy)
 631                         curl_easy_setopt(curl, CURLOPT_PROXY, session->proxy);
 632
 633                 if (debug)
 634                         curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
 635
 636                 dbg("user_password = %s\n", user_password);
 637                 dbg("data = %s\n", data);
 638                 dbg("proxy = %s\n", session->proxy);
 639
 640                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
 641                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl_buf);
 642                 if (!session->dry_run) {
 643                         res = curl_easy_perform(curl);
 644                         if (res && !session->background) {
 645                                 fprintf(stderr, "error(%d) trying to perform "
 646                                                 "operation\n", res);
 647                                 return -EINVAL;
 648                         }
 649                 }
 650
 651                 curl_easy_cleanup(curl);
 652                 if (session->action == ACTION_UPDATE)
 653                         curl_formfree(formpost);
 654                 bti_curl_buffer_free(curl_buf);
 655         } else {
 656                 switch (session->action) {
 657                 case ACTION_UPDATE:
 658                         escaped_tweet = oauth_url_escape(session->tweet);
 659                         if (session->replyto) {
 660                                 sprintf(endpoint,
 661                                         "%s%s?status=%s&in_reply_to_status_id=%s",
 662                                         session->hosturl, update_uri,
 663                                         escaped_tweet, session->replyto);
 664                         } else {
 665                                 sprintf(endpoint, "%s%s?status=%s",
 666                                         session->hosturl, update_uri,
 667                                         escaped_tweet);
 668                         }
 669
 670                         is_post = 1;
 671                         break;
 672                 case ACTION_USER:
 673                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 674                                 session->hosturl, user_uri, session->user,
 675                                 session->page);
 676                         break;
 677                 case ACTION_REPLIES:
 678                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 679                                 mentions_uri, session->page);
 680                         break;
 681                 case ACTION_PUBLIC:
 682                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 683                                 public_uri, session->page);
 684                         break;
 685                 case ACTION_GROUP:
 686                         sprintf(endpoint, "%s%s%s.xml?page=%d",
 687                                 session->hosturl, group_uri, session->group,
 688                                 session->page);
 689                         break;
 690                 case ACTION_FRIENDS:
 691                         sprintf(endpoint, "%s%s?page=%d", session->hosturl,
 692                                 friends_uri, session->page);
 693                         break;
 694                 case ACTION_RETWEET:
 695                         sprintf(endpoint, "%s%s%s.xml", session->hosturl,
 696                                 retweet_uri, session->retweet);
 697                         is_post = 1;
 698                         break;
 699                 default:
 700                         break;
 701                 }
 702
 703                 dbg("%s\n", endpoint);
 704                 if (!session->dry_run) {
 705                         if (is_post) {
 706                                 req_url = oauth_sign_url2(endpoint, &postarg, OA_HMAC,
 707                                                           NULL, session->consumer_key,
 708                                                           session->consumer_secret,
 709                                                           session->access_token_key,
 710                                                           session->access_token_secret);
 711                                 reply = oauth_http_post(req_url, postarg);
 712                         } else {
 713                                 req_url = oauth_sign_url2(endpoint, NULL, OA_HMAC, NULL,
 714                                                           session->consumer_key,
 715                                                           session->consumer_secret,
 716                                                           session->access_token_key,
 717                                                           session->access_token_secret);
 718                                 reply = oauth_http_get(req_url, postarg);
 719                         }
 720
 721                         dbg("%s\n", req_url);
 722                         dbg("%s\n", reply);
 723                         if (req_url)
 724                                 free(req_url);
 725                 }
 726
 727                 if (!reply) {
 728                         fprintf(stderr, "Error retrieving from URL (%s)\n", endpoint);
 729                         return -EIO;
 730                 }
 731
 732                 if ((session->action != ACTION_UPDATE) &&
 733                                 (session->action != ACTION_RETWEET))
 734                         parse_timeline(reply, session);
 735         }
 736         return 0;
 737 }
 738
 739 static void log_session(struct session *session, int retval)
 740 {
 741         FILE *log_file;
 742         char *filename;
 743
 744         /* Only log something if we have a log file set */
 745         if (!session->logfile)
 746                 return;
 747
 748         filename = alloca(strlen(session->homedir) +
 749                           strlen(session->logfile) + 3);
 750
 751         sprintf(filename, "%s/%s", session->homedir, session->logfile);
 752
 753         log_file = fopen(filename, "a+");
 754         if (log_file == NULL)
 755                 return;
 756
 757         switch (session->action) {
 758         case ACTION_UPDATE:
 759                 if (retval)
 760                         fprintf(log_file, "%s: host=%s tweet failed\n",
 761                                 session->time, session->hostname);
 762                 else
 763                         fprintf(log_file, "%s: host=%s tweet=%s\n",
 764                                 session->time, session->hostname,
 765                                 session->tweet);
 766                 break;
 767         case ACTION_FRIENDS:
 768                 fprintf(log_file, "%s: host=%s retrieving friends timeline\n",
 769                         session->time, session->hostname);
 770                 break;
 771         case ACTION_USER:
 772                 fprintf(log_file, "%s: host=%s retrieving %s's timeline\n",
 773                         session->time, session->hostname, session->user);
 774                 break;
 775         case ACTION_REPLIES:
 776                 fprintf(log_file, "%s: host=%s retrieving replies\n",
 777                         session->time, session->hostname);
 778                 break;
 779         case ACTION_PUBLIC:
 780                 fprintf(log_file, "%s: host=%s retrieving public timeline\n",
 781                         session->time, session->hostname);
 782                 break;
 783         case ACTION_GROUP:
 784                 fprintf(log_file, "%s: host=%s retrieving group timeline\n",
 785                         session->time, session->hostname);
 786                 break;
 787         default:
 788                 break;
 789         }
 790
 791         fclose(log_file);
 792 }
 793
 794 static char *get_string_from_stdin(void)
 795 {
 796         char *temp;
 797         char *string;
 798
 799         string = zalloc(1000);
 800         if (!string)
 801                 return NULL;
 802
 803         if (!fgets(string, 999, stdin))
 804                 return NULL;
 805         temp = strchr(string, '\n');
 806         if (temp)
 807                 *temp = '\0';
 808         return string;
 809 }
 810
 811 static void read_password(char *buf, size_t len, char *host)
 812 {
 813         char pwd[80];
 814         int retval;
 815         struct termios old;
 816         struct termios tp;
 817
 818         tcgetattr(0, &tp);
 819         old = tp;
 820
 821         tp.c_lflag &= (~ECHO);
 822         tcsetattr(0, TCSANOW, &tp);
 823
 824         fprintf(stdout, "Enter password for %s: ", host);
 825         fflush(stdout);
 826         tcflow(0, TCOOFF);
 827         retval = scanf("%79s", pwd);
 828         tcflow(0, TCOON);
 829         fprintf(stdout, "\n");
 830
 831         tcsetattr(0, TCSANOW, &old);
 832
 833         strncpy(buf, pwd, len);
 834         buf[len-1] = '\0';
 835 }
 836
 837 static int find_urls(const char *tweet, int **pranges)
 838 {
 839         /*
 840          * magic obtained from
 841          * http://www.geekpedia.com/KB65_How-to-validate-an-URL-using-RegEx-in-Csharp.html
 842          */
 843         static const char *re_magic =
 844                 "(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)/{1,3}"
 845                 "[0-9a-zA-Z;/~?:@&=+$\\.\\-_'()%]+)"
 846                 "(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?";
 847         pcre *re;
 848         const char *errptr;
 849         int erroffset;
 850         int ovector[10] = {0,};
 851         const size_t ovsize = sizeof(ovector)/sizeof(*ovector);
 852         int startoffset, tweetlen;
 853         int i, rc;
 854         int rbound = 10;
 855         int rcount = 0;
 856         int *ranges = malloc(sizeof(int) * rbound);
 857
 858         re = pcre_compile(re_magic,
 859                         PCRE_NO_AUTO_CAPTURE,
 860                         &errptr, &erroffset, NULL);
 861         if (!re) {
 862                 fprintf(stderr, "pcre_compile @%u: %s\n", erroffset, errptr);
 863                 exit(1);
 864         }
 865
 866         tweetlen = strlen(tweet);
 867         for (startoffset = 0; startoffset < tweetlen; ) {
 868
 869                 rc = pcre_exec(re, NULL, tweet, strlen(tweet), startoffset, 0,
 870                                 ovector, ovsize);
 871                 if (rc == PCRE_ERROR_NOMATCH)
 872                         break;
 873
 874                 if (rc < 0) {
 875                         fprintf(stderr, "pcre_exec @%u: %s\n",
 876                                 erroffset, errptr);
 877                         exit(1);
 878                 }
 879
 880                 for (i = 0; i < rc; i += 2) {
 881                         if ((rcount+2) == rbound) {
 882                                 rbound *= 2;
 883                                 ranges = realloc(ranges, sizeof(int) * rbound);
 884                         }
 885
 886                         ranges[rcount++] = ovector[i];
 887                         ranges[rcount++] = ovector[i+1];
 888                 }
 889
 890                 startoffset = ovector[1];
 891         }
 892
 893         pcre_free(re);
 894
 895         *pranges = ranges;
 896         return rcount;
 897 }
 898
 899 /**
 900  * bidirectional popen() call
 901  *
 902  * @param rwepipe - int array of size three
 903  * @param exe - program to run
 904  * @param argv - argument list
 905  * @return pid or -1 on error
 906  *
 907  * The caller passes in an array of three integers (rwepipe), on successful
 908  * execution it can then write to element 0 (stdin of exe), and read from
 909  * element 1 (stdout) and 2 (stderr).
 910  */
 911 static int popenRWE(int *rwepipe, const char *exe, const char *const argv[])
 912 {
 913         int in[2];
 914         int out[2];
 915         int err[2];
 916         int pid;
 917         int rc;
 918
 919         rc = pipe(in);
 920         if (rc < 0)
 921                 goto error_in;
 922
 923         rc = pipe(out);
 924         if (rc < 0)
 925                 goto error_out;
 926
 927         rc = pipe(err);
 928         if (rc < 0)
 929                 goto error_err;
 930
 931         pid = fork();
 932         if (pid > 0) {
 933                 /* parent */
 934                 close(in[0]);
 935                 close(out[1]);
 936                 close(err[1]);
 937                 rwepipe[0] = in[1];
 938                 rwepipe[1] = out[0];
 939                 rwepipe[2] = err[0];
 940                 return pid;
 941         } else if (pid == 0) {
 942                 /* child */
 943                 close(in[1]);
 944                 close(out[0]);
 945                 close(err[0]);
 946                 close(0);
 947                 rc = dup(in[0]);
 948                 close(1);
 949                 rc = dup(out[1]);
 950                 close(2);
 951                 rc = dup(err[1]);
 952
 953                 execvp(exe, (char **)argv);
 954                 exit(1);
 955         } else
 956                 goto error_fork;
 957
 958         return pid;
 959
 960 error_fork:
 961         close(err[0]);
 962         close(err[1]);
 963 error_err:
 964         close(out[0]);
 965         close(out[1]);
 966 error_out:
 967         close(in[0]);
 968         close(in[1]);
 969 error_in:
 970         return -1;
 971 }
 972
 973 static int pcloseRWE(int pid, int *rwepipe)
 974 {
 975         int rc, status;
 976         close(rwepipe[0]);
 977         close(rwepipe[1]);
 978         close(rwepipe[2]);
 979         rc = waitpid(pid, &status, 0);
 980         return status;
 981 }
 982
 983 static char *shrink_one_url(int *rwepipe, char *big)
 984 {
 985         int biglen = strlen(big);
 986         char *small;
 987         int smalllen;
 988         int rc;
 989
 990         rc = dprintf(rwepipe[0], "%s\n", big);
 991         if (rc < 0)
 992                 return big;
 993
 994         smalllen = biglen + 128;
 995         small = malloc(smalllen);
 996         if (!small)
 997                 return big;
 998
 999         rc = read(rwepipe[1], small, smalllen);
1000         if (rc < 0 || rc > biglen)
1001                 goto error_free_small;
1002
1003         if (strncmp(small, "http://", 7))
1004                 goto error_free_small;
1005
1006         smalllen = rc;
1007         while (smalllen && isspace(small[smalllen-1]))
1008                         small[--smalllen] = 0;
1009
1010         free(big);
1011         return small;
1012
1013 error_free_small:
1014         free(small);
1015         return big;
1016 }
1017
1018 static char *shrink_urls(char *text)
1019 {
1020         int *ranges;
1021         int rcount;
1022         int i;
1023         int inofs = 0;
1024         int outofs = 0;
1025         const char *const shrink_args[] = {
1026                 "bti-shrink-urls",
1027                 NULL
1028         };
1029         int shrink_pid;
1030         int shrink_pipe[3];
1031         int inlen = strlen(text);
1032
1033         dbg("before len=%u\n", inlen);
1034
1035         shrink_pid = popenRWE(shrink_pipe, shrink_args[0], shrink_args);
1036         if (shrink_pid < 0)
1037                 return text;
1038
1039         rcount = find_urls(text, &ranges);
1040         if (!rcount)
1041                 return text;
1042
1043         for (i = 0; i < rcount; i += 2) {
1044                 int url_start = ranges[i];
1045                 int url_end = ranges[i+1];
1046                 int long_url_len = url_end - url_start;
1047                 char *url = strndup(text + url_start, long_url_len);
1048                 int short_url_len;
1049                 int not_url_len = url_start - inofs;
1050
1051                 dbg("long  url[%u]: %s\n", long_url_len, url);
1052                 url = shrink_one_url(shrink_pipe, url);
1053                 short_url_len = url ? strlen(url) : 0;
1054                 dbg("short url[%u]: %s\n", short_url_len, url);
1055
1056                 if (!url || short_url_len >= long_url_len) {
1057                         /* The short url ended up being too long
1058                          * or unavailable */
1059                         if (inofs) {
1060                                 strncpy(text + outofs, text + inofs,
1061                                                 not_url_len + long_url_len);
1062                         }
1063                         inofs += not_url_len + long_url_len;
1064                         outofs += not_url_len + long_url_len;
1065
1066                 } else {
1067                         /* copy the unmodified block */
1068                         strncpy(text + outofs, text + inofs, not_url_len);
1069                         inofs += not_url_len;
1070                         outofs += not_url_len;
1071
1072                         /* copy the new url */
1073                         strncpy(text + outofs, url, short_url_len);
1074                         inofs += long_url_len;
1075                         outofs += short_url_len;
1076                 }
1077
1078                 free(url);
1079         }
1080
1081         /* copy the last block after the last match */
1082         if (inofs) {
1083                 int tail = inlen - inofs;
1084                 if (tail) {
1085                         strncpy(text + outofs, text + inofs, tail);
1086                         outofs += tail;
1087                 }
1088         }
1089
1090         free(ranges);
1091
1092         (void)pcloseRWE(shrink_pid, shrink_pipe);
1093
1094         text[outofs] = 0;
1095         dbg("after len=%u\n", outofs);
1096         return text;
1097 }
1098
1099 int main(int argc, char *argv[], char *envp[])
1100 {
1101         static const struct option options[] = {
1102                 { "debug", 0, NULL, 'd' },
1103                 { "verbose", 0, NULL, 'V' },
1104                 { "account", 1, NULL, 'a' },
1105                 { "password", 1, NULL, 'p' },
1106                 { "host", 1, NULL, 'H' },
1107                 { "proxy", 1, NULL, 'P' },
1108                 { "action", 1, NULL, 'A' },
1109                 { "user", 1, NULL, 'u' },
1110                 { "group", 1, NULL, 'G' },
1111                 { "logfile", 1, NULL, 'L' },
1112                 { "shrink-urls", 0, NULL, 's' },
1113                 { "help", 0, NULL, 'h' },
1114                 { "bash", 0, NULL, 'b' },
1115                 { "background", 0, NULL, 'B' },
1116                 { "dry-run", 0, NULL, 'n' },
1117                 { "page", 1, NULL, 'g' },
1118                 { "version", 0, NULL, 'v' },
1119                 { "config", 1, NULL, 'c' },
1120                 { "replyto", 1, NULL, 'r' },
1121                 { "retweet", 1, NULL, 'w' },
1122                 { }
1123         };
1124         struct session *session;
1125         pid_t child;
1126         char *tweet;
1127         static char password[80];
1128         int retval = 0;
1129         int option;
1130         char *http_proxy;
1131         time_t t;
1132         int page_nr;
1133
1134         debug = 0;
1135
1136         session = session_alloc();
1137         if (!session) {
1138                 fprintf(stderr, "no more memory...\n");
1139                 return -1;
1140         }
1141
1142         /* get the current time so that we can log it later */
1143         time(&t);
1144         session->time = strdup(ctime(&t));
1145         session->time[strlen(session->time)-1] = 0x00;
1146
1147         /* Get the home directory so we can try to find a config file */
1148         session->homedir = strdup(getenv("HOME"));
1149
1150         /* set up a default config file location (traditionally ~/.bti) */
1151         session->configfile = zalloc(strlen(session->homedir) + 7);
1152         sprintf(session->configfile, "%s/.bti", session->homedir);
1153
1154         /* Set environment variables first, before reading command line options
1155          * or config file values. */
1156         http_proxy = getenv("http_proxy");
1157         if (http_proxy) {
1158                 if (session->proxy)
1159                         free(session->proxy);
1160                 session->proxy = strdup(http_proxy);
1161                 dbg("http_proxy = %s\n", session->proxy);
1162         }
1163
1164         bti_parse_configfile(session);
1165
1166         while (1) {
1167                 option = getopt_long_only(argc, argv,
1168                                           "dp:P:H:a:A:u:c:hg:G:sr:nVvw:",
1169                                           options, NULL);
1170                 if (option == -1)
1171                         break;
1172                 switch (option) {
1173                 case 'd':
1174                         debug = 1;
1175                         break;
1176                 case 'V':
1177                         session->verbose = 1;
1178                         break;
1179                 case 'a':
1180                         if (session->account)
1181                                 free(session->account);
1182                         session->account = strdup(optarg);
1183                         dbg("account = %s\n", session->account);
1184                         break;
1185                 case 'g':
1186                         page_nr = atoi(optarg);
1187                         dbg("page = %d\n", page_nr);
1188                         session->page = page_nr;
1189                         break;
1190                 case 'r':
1191                         session->replyto = strdup(optarg);
1192                         dbg("in_reply_to_status_id = %s\n", session->replyto);
1193                         break;
1194                 case 'w':
1195                         session->retweet = strdup(optarg);
1196                         dbg("Retweet ID = %s\n", session->retweet);
1197                         break;
1198                 case 'p':
1199                         if (session->password)
1200                                 free(session->password);
1201                         session->password = strdup(optarg);
1202                         dbg("password = %s\n", session->password);
1203                         break;
1204                 case 'P':
1205                         if (session->proxy)
1206                                 free(session->proxy);
1207                         session->proxy = strdup(optarg);
1208                         dbg("proxy = %s\n", session->proxy);
1209                         break;
1210                 case 'A':
1211                         if (strcasecmp(optarg, "update") == 0)
1212                                 session->action = ACTION_UPDATE;
1213                         else if (strcasecmp(optarg, "friends") == 0)
1214                                 session->action = ACTION_FRIENDS;
1215                         else if (strcasecmp(optarg, "user") == 0)
1216                                 session->action = ACTION_USER;
1217                         else if (strcasecmp(optarg, "replies") == 0)
1218                                 session->action = ACTION_REPLIES;
1219                         else if (strcasecmp(optarg, "public") == 0)
1220                                 session->action = ACTION_PUBLIC;
1221                         else if (strcasecmp(optarg, "group") == 0)
1222                                 session->action = ACTION_GROUP;
1223                         else if (strcasecmp(optarg,"retweet") == 0)
1224                                 session->action = ACTION_RETWEET;
1225                         else
1226                                 session->action = ACTION_UNKNOWN;
1227                         dbg("action = %d\n", session->action);
1228                         break;
1229                 case 'u':
1230                         if (session->user)
1231                                 free(session->user);
1232                         session->user = strdup(optarg);
1233                         dbg("user = %s\n", session->user);
1234                         break;
1235
1236                 case 'G':
1237                         if (session->group)
1238                                 free(session->group);
1239                         session->group = strdup(optarg);
1240                         dbg("group = %s\n", session->group);
1241                         break;
1242                 case 'L':
1243                         if (session->logfile)
1244                                 free(session->logfile);
1245                         session->logfile = strdup(optarg);
1246                         dbg("logfile = %s\n", session->logfile);
1247                         break;
1248                 case 's':
1249                         session->shrink_urls = 1;
1250                         break;
1251                 case 'H':
1252                         if (session->hosturl)
1253                                 free(session->hosturl);
1254                         if (session->hostname)
1255                                 free(session->hostname);
1256                         if (strcasecmp(optarg, "twitter") == 0) {
1257                                 session->host = HOST_TWITTER;
1258                                 session->hosturl = strdup(twitter_host);
1259                                 session->hostname = strdup(twitter_name);
1260                         } else if (strcasecmp(optarg, "identica") == 0) {
1261                                 session->host = HOST_IDENTICA;
1262                                 session->hosturl = strdup(identica_host);
1263                                 session->hostname = strdup(identica_name);
1264                         } else {
1265                                 session->host = HOST_CUSTOM;
1266                                 session->hosturl = strdup(optarg);
1267                                 session->hostname = strdup(optarg);
1268                         }
1269                         dbg("host = %d\n", session->host);
1270                         break;
1271                 case 'b':
1272                         session->bash = 1;
1273                         /* fall-through intended */
1274                 case 'B':
1275                         session->background = 1;
1276                         break;
1277                 case 'c':
1278                         if (session->configfile)
1279                                 free(session->configfile);
1280                         session->configfile = strdup(optarg);
1281                         dbg("configfile = %s\n", session->configfile);
1282
1283                         /*
1284                          * read the config file now.  Yes, this could override
1285                          * previously set options from the command line, but
1286                          * the user asked for it...
1287                          */
1288                         bti_parse_configfile(session);
1289                         break;
1290                 case 'h':
1291                         display_help();
1292                         goto exit;
1293                 case 'n':
1294                         session->dry_run = 1;
1295                         break;
1296                 case 'v':
1297                         display_version();
1298                         goto exit;
1299                 default:
1300                         display_help();
1301                         goto exit;
1302                 }
1303         }
1304
1305         session_readline_init(session);
1306         /*
1307          * Show the version to make it easier to determine what
1308          * is going on here
1309          */
1310         if (debug)
1311                 display_version();
1312
1313         if (session->host == HOST_TWITTER) {
1314                 if (!session->consumer_key || !session->consumer_secret) {
1315                         if (session->action == ACTION_USER ||
1316                                         session->action == ACTION_PUBLIC) {
1317                                 /* Some actions may still work without authentication */
1318                                 session->guest = 1;
1319                         } else {
1320                                 fprintf(stderr,
1321                                                 "Twitter no longer supports HTTP basic authentication.\n"
1322                                                 "Both consumer key, and consumer secret are required"
1323                                                 " for bti in order to behave as an OAuth consumer.\n");
1324                                 goto exit;
1325                         }
1326                 }
1327                 if (session->action == ACTION_GROUP) {
1328                         fprintf(stderr, "Groups only work in Identi.ca.\n");
1329                         goto exit;
1330                 }
1331         } else {
1332                 if (!session->consumer_key || !session->consumer_secret)
1333                         session->no_oauth = 1;
1334         }
1335
1336         if (session->no_oauth) {
1337                 if (!session->account) {
1338                         fprintf(stdout, "Enter account for %s: ",
1339                                 session->hostname);
1340                         session->account = session->readline(NULL);
1341                 }
1342                 if (!session->password) {
1343                         read_password(password, sizeof(password),
1344                                       session->hostname);
1345                         session->password = strdup(password);
1346                 }
1347         } else if (!session->guest) {
1348                 if (!session->access_token_key ||
1349                     !session->access_token_secret) {
1350                         request_access_token(session);
1351                         goto exit;
1352                 }
1353         }
1354
1355         if (session->action == ACTION_UNKNOWN) {
1356                 fprintf(stderr, "Unknown action, valid actions are:\n"
1357                         "'update', 'friends', 'public', 'replies', 'group' or 'user'.\n");
1358                 goto exit;
1359         }
1360
1361         if (session->action == ACTION_GROUP && !session->group) {
1362                 fprintf(stdout, "Enter group name: ");
1363                 session->group = session->readline(NULL);
1364         }
1365
1366         if (session->action == ACTION_RETWEET) {
1367                 if (!session->retweet) {
1368                         char *rtid;
1369
1370                         fprintf(stdout, "Status ID to retweet: ");
1371                         rtid = get_string_from_stdin();
1372                         session->retweet = zalloc(strlen(rtid) + 10);
1373                         sprintf(session->retweet,"%s", rtid);
1374                         free(rtid);
1375                 }
1376
1377                 if (!session->retweet || strlen(session->retweet) == 0) {
1378                         dbg("no retweet?\n");
1379                         return -1;
1380                 }
1381
1382                 dbg("retweet ID = %s\n", session->retweet);
1383         }
1384
1385         if (session->action == ACTION_UPDATE) {
1386                 if (session->background || !session->interactive)
1387                         tweet = get_string_from_stdin();
1388                 else
1389                         tweet = session->readline("tweet: ");
1390                 if (!tweet || strlen(tweet) == 0) {
1391                         dbg("no tweet?\n");
1392                         return -1;
1393                 }
1394
1395                 if (session->shrink_urls)
1396                         tweet = shrink_urls(tweet);
1397
1398                 session->tweet = zalloc(strlen(tweet) + 10);
1399                 if (session->bash)
1400                         sprintf(session->tweet, "%c %s",
1401                                 getuid() ? '$' : '#', tweet);
1402                 else
1403                         sprintf(session->tweet, "%s", tweet);
1404
1405                 free(tweet);
1406                 dbg("tweet = %s\n", session->tweet);
1407         }
1408
1409         if (session->page == 0)
1410                 session->page = 1;
1411         dbg("config file = %s\n", session->configfile);
1412         dbg("host = %d\n", session->host);
1413         dbg("action = %d\n", session->action);
1414
1415         /* fork ourself so that the main shell can get on
1416          * with it's life as we try to connect and handle everything
1417          */
1418         if (session->background) {
1419                 child = fork();
1420                 if (child) {
1421                         dbg("child is %d\n", child);
1422                         exit(0);
1423                 }
1424         }
1425
1426         retval = send_request(session);
1427         if (retval && !session->background)
1428                 fprintf(stderr, "operation failed\n");
1429
1430         log_session(session, retval);
1431 exit:
1432         session_readline_cleanup(session);
1433         session_free(session);
1434         return retval;;
1435 }