/[debian]/bti/branches/upstream/current/bti.c
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Contents of /bti/branches/upstream/current/bti.c

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Revision 1986 - (show annotations)
Sun Jan 10 00:18:24 2010 UTC (10 years, 9 months ago) by gregoa
File MIME type: text/plain
File size: 30773 byte(s)
[svn-upgrade] Integrating new upstream version, bti (025)
1 /*
2 * Copyright (C) 2008 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2009 Bart Trojanowski <bart@jukie.net>
4 * Copyright (C) 2009 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
43
44 #define zalloc(size) calloc(size, 1)
45
46 #define dbg(format, arg...) \
47 do { \
48 if (debug) \
49 fprintf(stdout, "bti: %s: " format , __func__ , \
50 ## arg); \
51 } while (0)
52
53
54 static int debug;
55 static int verbose;
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_UNKNOWN = 32
71 };
72
73 struct session {
74 char *password;
75 char *account;
76 char *tweet;
77 char *proxy;
78 char *time;
79 char *homedir;
80 char *logfile;
81 char *user;
82 char *group;
83 char *hosturl;
84 char *hostname;
85 int bash;
86 int shrink_urls;
87 int dry_run;
88 int page;
89 enum host host;
90 enum action action;
91 void *readline_handle;
92 char *(*readline)(const char *);
93 };
94
95 struct bti_curl_buffer {
96 char *data;
97 enum action action;
98 int length;
99 };
100
101 static void display_help(void)
102 {
103 fprintf(stdout, "bti - send tweet to twitter or identi.ca\n");
104 fprintf(stdout, "Version: " VERSION "\n");
105 fprintf(stdout, "Usage:\n");
106 fprintf(stdout, " bti [options]\n");
107 fprintf(stdout, "options are:\n");
108 fprintf(stdout, " --account accountname\n");
109 fprintf(stdout, " --password password\n");
110 fprintf(stdout, " --action action\n");
111 fprintf(stdout, " ('update', 'friends', 'public', 'replies', "
112 "'group' or 'user')\n");
113 fprintf(stdout, " --user screenname\n");
114 fprintf(stdout, " --group groupname\n");
115 fprintf(stdout, " --proxy PROXY:PORT\n");
116 fprintf(stdout, " --host HOST\n");
117 fprintf(stdout, " --logfile logfile\n");
118 fprintf(stdout, " --shrink-urls\n");
119 fprintf(stdout, " --page PAGENUMBER\n");
120 fprintf(stdout, " --bash\n");
121 fprintf(stdout, " --debug\n");
122 fprintf(stdout, " --verbose\n");
123 fprintf(stdout, " --dry-run\n");
124 fprintf(stdout, " --version\n");
125 fprintf(stdout, " --help\n");
126 }
127
128 static void display_version(void)
129 {
130 fprintf(stdout, "bti - version %s\n", VERSION);
131 }
132
133 static char *get_string(const char *name)
134 {
135 char *temp;
136 char *string;
137
138 string = zalloc(1000);
139 if (!string)
140 exit(1);
141 if (name != NULL)
142 fprintf(stdout, "%s", name);
143 if (!fgets(string, 999, stdin))
144 return NULL;
145 temp = strchr(string, '\n');
146 *temp = '\0';
147 return string;
148 }
149
150 /*
151 * Try to get a handle to a readline function from a variety of different
152 * libraries. If nothing is present on the system, then fall back to an
153 * internal one.
154 *
155 * Logic originally based off of code in the e2fsutils package in the
156 * lib/ss/get_readline.c file, which is licensed under the MIT license.
157 *
158 * This keeps us from having to relicense the bti codebase if readline
159 * ever changes its license, as there is no link-time dependancy.
160 * It is a run-time thing only, and we handle any readline-like library
161 * in the same manner, making bti not be a derivative work of any
162 * other program.
163 */
164 static void session_readline_init(struct session *session)
165 {
166 /* Libraries we will try to use for readline/editline functionality */
167 const char *libpath = "libreadline.so.6:libreadline.so.5:"
168 "libreadline.so.4:libreadline.so:libedit.so.2:"
169 "libedit.so:libeditline.so.0:libeditline.so";
170 void *handle = NULL;
171 char *tmp, *cp, *next;
172 int (*bind_key)(int, void *);
173 void (*insert)(void);
174
175 /* default to internal function if we can't find anything */
176 session->readline = get_string;
177
178 tmp = malloc(strlen(libpath)+1);
179 if (!tmp)
180 return;
181 strcpy(tmp, libpath);
182 for (cp = tmp; cp; cp = next) {
183 next = strchr(cp, ':');
184 if (next)
185 *next++ = 0;
186 if (*cp == 0)
187 continue;
188 if ((handle = dlopen(cp, RTLD_NOW))) {
189 dbg("Using %s for readline library\n", cp);
190 break;
191 }
192 }
193 free(tmp);
194 if (!handle) {
195 dbg("No readline library found.\n");
196 return;
197 }
198
199 session->readline_handle = handle;
200 session->readline = (char *(*)(const char *))dlsym(handle, "readline");
201 if (session->readline == NULL) {
202 /* something odd happened, default back to internal stuff */
203 session->readline_handle = NULL;
204 session->readline = get_string;
205 return;
206 }
207
208 /*
209 * If we found a library, turn off filename expansion
210 * as that makes no sense from within bti.
211 */
212 bind_key = (int (*)(int, void *))dlsym(handle, "rl_bind_key");
213 insert = (void (*)(void))dlsym(handle, "rl_insert");
214 if (bind_key && insert)
215 bind_key('\t', insert);
216 }
217
218 static void session_readline_cleanup(struct session *session)
219 {
220 if (session->readline_handle)
221 dlclose(session->readline_handle);
222 }
223
224 static struct session *session_alloc(void)
225 {
226 struct session *session;
227
228 session = zalloc(sizeof(*session));
229 if (!session)
230 return NULL;
231 session_readline_init(session);
232 return session;
233 }
234
235 static void session_free(struct session *session)
236 {
237 if (!session)
238 return;
239 session_readline_cleanup(session);
240 free(session->password);
241 free(session->account);
242 free(session->tweet);
243 free(session->proxy);
244 free(session->time);
245 free(session->homedir);
246 free(session->user);
247 free(session->group);
248 free(session->hosturl);
249 free(session->hostname);
250 free(session);
251 }
252
253 static struct bti_curl_buffer *bti_curl_buffer_alloc(enum action action)
254 {
255 struct bti_curl_buffer *buffer;
256
257 buffer = zalloc(sizeof(*buffer));
258 if (!buffer)
259 return NULL;
260
261 /* start out with a data buffer of 1 byte to
262 * make the buffer fill logic simpler */
263 buffer->data = zalloc(1);
264 if (!buffer->data) {
265 free(buffer);
266 return NULL;
267 }
268 buffer->length = 0;
269 buffer->action = action;
270 return buffer;
271 }
272
273 static void bti_curl_buffer_free(struct bti_curl_buffer *buffer)
274 {
275 if (!buffer)
276 return;
277 free(buffer->data);
278 free(buffer);
279 }
280
281 static const char *twitter_host = "https://twitter.com/statuses";
282 static const char *identica_host = "https://identi.ca/api/statuses";
283 static const char *twitter_name = "twitter";
284 static const char *identica_name = "identi.ca";
285
286 static const char *user_uri = "/user_timeline/";
287 static const char *update_uri = "/update.xml";
288 static const char *public_uri = "/public_timeline.xml";
289 static const char *friends_uri = "/friends_timeline.xml";
290 static const char *replies_uri = "/replies.xml";
291 static const char *group_uri = "/../laconica/groups/timeline/";
292
293 static CURL *curl_init(void)
294 {
295 CURL *curl;
296
297 curl = curl_easy_init();
298 if (!curl) {
299 fprintf(stderr, "Can not init CURL!\n");
300 return NULL;
301 }
302 /* some ssl sanity checks on the connection we are making */
303 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
304 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
305 return curl;
306 }
307
308 static void parse_statuses(xmlDocPtr doc, xmlNodePtr current)
309 {
310 xmlChar *text = NULL;
311 xmlChar *user = NULL;
312 xmlChar *created = NULL;
313 xmlNodePtr userinfo;
314
315 current = current->xmlChildrenNode;
316 while (current != NULL) {
317 if (current->type == XML_ELEMENT_NODE) {
318 if (!xmlStrcmp(current->name, (const xmlChar *)"created_at"))
319 created = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
320 if (!xmlStrcmp(current->name, (const xmlChar *)"text"))
321 text = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
322 if (!xmlStrcmp(current->name, (const xmlChar *)"user")) {
323 userinfo = current->xmlChildrenNode;
324 while (userinfo != NULL) {
325 if ((!xmlStrcmp(userinfo->name, (const xmlChar *)"screen_name"))) {
326 if (user)
327 xmlFree(user);
328 user = xmlNodeListGetString(doc, userinfo->xmlChildrenNode, 1);
329 }
330 userinfo = userinfo->next;
331 }
332 }
333
334 if (user && text && created) {
335 if (verbose)
336 printf("[%s] (%.16s) %s\n",
337 user, created, text);
338 else
339 printf("[%s] %s\n",
340 user, text);
341 xmlFree(user);
342 xmlFree(text);
343 xmlFree(created);
344 user = NULL;
345 text = NULL;
346 created = NULL;
347 }
348 }
349 current = current->next;
350 }
351
352 return;
353 }
354
355 static void parse_timeline(char *document)
356 {
357 xmlDocPtr doc;
358 xmlNodePtr current;
359
360 doc = xmlReadMemory(document, strlen(document), "timeline.xml",
361 NULL, XML_PARSE_NOERROR);
362 if (doc == NULL)
363 return;
364
365 current = xmlDocGetRootElement(doc);
366 if (current == NULL) {
367 fprintf(stderr, "empty document\n");
368 xmlFreeDoc(doc);
369 return;
370 }
371
372 if (xmlStrcmp(current->name, (const xmlChar *) "statuses")) {
373 fprintf(stderr, "unexpected document type\n");
374 xmlFreeDoc(doc);
375 return;
376 }
377
378 current = current->xmlChildrenNode;
379 while (current != NULL) {
380 if ((!xmlStrcmp(current->name, (const xmlChar *)"status")))
381 parse_statuses(doc, current);
382 current = current->next;
383 }
384 xmlFreeDoc(doc);
385
386 return;
387 }
388
389 static size_t curl_callback(void *buffer, size_t size, size_t nmemb,
390 void *userp)
391 {
392 struct bti_curl_buffer *curl_buf = userp;
393 size_t buffer_size = size * nmemb;
394 char *temp;
395
396 if ((!buffer) || (!buffer_size) || (!curl_buf))
397 return -EINVAL;
398
399 /* add to the data we already have */
400 temp = zalloc(curl_buf->length + buffer_size + 1);
401 if (!temp)
402 return -ENOMEM;
403
404 memcpy(temp, curl_buf->data, curl_buf->length);
405 free(curl_buf->data);
406 curl_buf->data = temp;
407 memcpy(&curl_buf->data[curl_buf->length], (char *)buffer, buffer_size);
408 curl_buf->length += buffer_size;
409 if (curl_buf->action)
410 parse_timeline(curl_buf->data);
411
412 dbg("%s\n", curl_buf->data);
413
414 return buffer_size;
415 }
416
417 static int send_request(struct session *session)
418 {
419 char endpoint[100];
420 char user_password[500];
421 char data[500];
422 struct bti_curl_buffer *curl_buf;
423 CURL *curl = NULL;
424 CURLcode res;
425 struct curl_httppost *formpost = NULL;
426 struct curl_httppost *lastptr = NULL;
427 struct curl_slist *slist = NULL;
428
429 if (!session)
430 return -EINVAL;
431
432 curl_buf = bti_curl_buffer_alloc(session->action);
433 if (!curl_buf)
434 return -ENOMEM;
435
436 curl = curl_init();
437 if (!curl)
438 return -EINVAL;
439
440 if (!session->hosturl)
441 session->hosturl = strdup(twitter_host);
442
443 switch (session->action) {
444 case ACTION_UPDATE:
445 snprintf(user_password, sizeof(user_password), "%s:%s",
446 session->account, session->password);
447 snprintf(data, sizeof(data), "status=\"%s\"", session->tweet);
448 curl_formadd(&formpost, &lastptr,
449 CURLFORM_COPYNAME, "status",
450 CURLFORM_COPYCONTENTS, session->tweet,
451 CURLFORM_END);
452
453 curl_formadd(&formpost, &lastptr,
454 CURLFORM_COPYNAME, "source",
455 CURLFORM_COPYCONTENTS, "bti",
456 CURLFORM_END);
457
458 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
459 slist = curl_slist_append(slist, "Expect:");
460 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
461
462 sprintf(endpoint, "%s%s", session->hosturl, update_uri);
463 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
464 curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
465
466 break;
467 case ACTION_FRIENDS:
468 snprintf(user_password, sizeof(user_password), "%s:%s",
469 session->account, session->password);
470 sprintf(endpoint, "%s%s?page=%d", session->hosturl,
471 friends_uri, session->page);
472 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
473 curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
474
475 break;
476 case ACTION_USER:
477 sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
478 user_uri, session->user, session->page);
479 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
480
481 break;
482 case ACTION_REPLIES:
483 snprintf(user_password, sizeof(user_password), "%s:%s",
484 session->account, session->password);
485 sprintf(endpoint, "%s%s?page=%d", session->hosturl, replies_uri,
486 session->page);
487 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
488 curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
489
490 break;
491 case ACTION_PUBLIC:
492 sprintf(endpoint, "%s%s?page=%d", session->hosturl, public_uri,
493 session->page);
494 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
495
496 break;
497 case ACTION_GROUP:
498 sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
499 group_uri, session->group, session->page);
500 curl_easy_setopt(curl, CURLOPT_URL, endpoint);
501
502 break;
503 default:
504 break;
505 }
506
507 if (session->proxy)
508 curl_easy_setopt(curl, CURLOPT_PROXY, session->proxy);
509
510 if (debug)
511 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
512
513 dbg("user_password = %s\n", user_password);
514 dbg("data = %s\n", data);
515 dbg("proxy = %s\n", session->proxy);
516
517 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
518 curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl_buf);
519 if (!session->dry_run) {
520 res = curl_easy_perform(curl);
521 if (res && !session->bash) {
522 fprintf(stderr, "error(%d) trying to perform "
523 "operation\n", res);
524 return -EINVAL;
525 }
526 }
527
528 curl_easy_cleanup(curl);
529 if (session->action == ACTION_UPDATE)
530 curl_formfree(formpost);
531 bti_curl_buffer_free(curl_buf);
532 return 0;
533 }
534
535 static void parse_configfile(struct session *session)
536 {
537 FILE *config_file;
538 char *line = NULL;
539 size_t len = 0;
540 char *account = NULL;
541 char *password = NULL;
542 char *host = NULL;
543 char *proxy = NULL;
544 char *logfile = NULL;
545 char *action = NULL;
546 char *user = NULL;
547 char *file;
548 int shrink_urls = 0;
549
550 /* config file is ~/.bti */
551 file = alloca(strlen(session->homedir) + 7);
552
553 sprintf(file, "%s/.bti", session->homedir);
554
555 config_file = fopen(file, "r");
556
557 /* No error if file does not exist or is unreadable. */
558 if (config_file == NULL)
559 return;
560
561 do {
562 ssize_t n = getline(&line, &len, config_file);
563 if (n < 0)
564 break;
565 if (line[n - 1] == '\n')
566 line[n - 1] = '\0';
567 /* Parse file. Format is the usual value pairs:
568 account=name
569 passwort=value
570 # is a comment character
571 */
572 *strchrnul(line, '#') = '\0';
573 char *c = line;
574 while (isspace(*c))
575 c++;
576 /* Ignore blank lines. */
577 if (c[0] == '\0')
578 continue;
579
580 if (!strncasecmp(c, "account", 7) && (c[7] == '=')) {
581 c += 8;
582 if (c[0] != '\0')
583 account = strdup(c);
584 } else if (!strncasecmp(c, "password", 8) &&
585 (c[8] == '=')) {
586 c += 9;
587 if (c[0] != '\0')
588 password = strdup(c);
589 } else if (!strncasecmp(c, "host", 4) &&
590 (c[4] == '=')) {
591 c += 5;
592 if (c[0] != '\0')
593 host = strdup(c);
594 } else if (!strncasecmp(c, "proxy", 5) &&
595 (c[5] == '=')) {
596 c += 6;
597 if (c[0] != '\0')
598 proxy = strdup(c);
599 } else if (!strncasecmp(c, "logfile", 7) &&
600 (c[7] == '=')) {
601 c += 8;
602 if (c[0] != '\0')
603 logfile = strdup(c);
604 } else if (!strncasecmp(c, "action", 6) &&
605 (c[6] == '=')) {
606 c += 7;
607 if (c[0] != '\0')
608 action = strdup(c);
609 } else if (!strncasecmp(c, "user", 4) &&
610 (c[4] == '=')) {
611 c += 5;
612 if (c[0] != '\0')
613 user = strdup(c);
614 } else if (!strncasecmp(c, "shrink-urls", 11) &&
615 (c[11] == '=')) {
616 c += 12;
617 if (!strncasecmp(c, "true", 4) ||
618 !strncasecmp(c, "yes", 3))
619 shrink_urls = 1;
620 } else if (!strncasecmp(c, "verbose", 7) &&
621 (c[7] == '=')) {
622 c += 8;
623 if (!strncasecmp(c, "true", 4) ||
624 !strncasecmp(c, "yes", 3))
625 verbose = 1;
626 }
627 } while (!feof(config_file));
628
629 if (password)
630 session->password = password;
631 if (account)
632 session->account = account;
633 if (host) {
634 if (strcasecmp(host, "twitter") == 0) {
635 session->host = HOST_TWITTER;
636 session->hosturl = strdup(twitter_host);
637 session->hostname = strdup(twitter_name);
638 } else if (strcasecmp(host, "identica") == 0) {
639 session->host = HOST_IDENTICA;
640 session->hosturl = strdup(identica_host);
641 session->hostname = strdup(identica_name);
642 } else {
643 session->host = HOST_CUSTOM;
644 session->hosturl = strdup(host);
645 session->hostname = strdup(host);
646 }
647 free(host);
648 }
649 if (proxy) {
650 if (session->proxy)
651 free(session->proxy);
652 session->proxy = proxy;
653 }
654 if (logfile)
655 session->logfile = logfile;
656 if (action) {
657 if (strcasecmp(action, "update") == 0)
658 session->action = ACTION_UPDATE;
659 else if (strcasecmp(action, "friends") == 0)
660 session->action = ACTION_FRIENDS;
661 else if (strcasecmp(action, "user") == 0)
662 session->action = ACTION_USER;
663 else if (strcasecmp(action, "replies") == 0)
664 session->action = ACTION_REPLIES;
665 else if (strcasecmp(action, "public") == 0)
666 session->action = ACTION_PUBLIC;
667 else if (strcasecmp(action, "group") == 0)
668 session->action = ACTION_GROUP;
669 else
670 session->action = ACTION_UNKNOWN;
671 free(action);
672 }
673 if (user)
674 session->user = user;
675 session->shrink_urls = shrink_urls;
676
677 /* Free buffer and close file. */
678 free(line);
679 fclose(config_file);
680 }
681
682 static void log_session(struct session *session, int retval)
683 {
684 FILE *log_file;
685 char *filename;
686
687 /* Only log something if we have a log file set */
688 if (!session->logfile)
689 return;
690
691 filename = alloca(strlen(session->homedir) +
692 strlen(session->logfile) + 3);
693
694 sprintf(filename, "%s/%s", session->homedir, session->logfile);
695
696 log_file = fopen(filename, "a+");
697 if (log_file == NULL)
698 return;
699
700 switch (session->action) {
701 case ACTION_UPDATE:
702 if (retval)
703 fprintf(log_file, "%s: host=%s tweet failed\n",
704 session->time, session->hostname);
705 else
706 fprintf(log_file, "%s: host=%s tweet=%s\n",
707 session->time, session->hostname, session->tweet);
708 break;
709 case ACTION_FRIENDS:
710 fprintf(log_file, "%s: host=%s retrieving friends timeline\n",
711 session->time, session->hostname);
712 break;
713 case ACTION_USER:
714 fprintf(log_file, "%s: host=%s retrieving %s's timeline\n",
715 session->time, session->hostname, session->user);
716 break;
717 case ACTION_REPLIES:
718 fprintf(log_file, "%s: host=%s retrieving replies\n",
719 session->time, session->hostname);
720 break;
721 case ACTION_PUBLIC:
722 fprintf(log_file, "%s: host=%s retrieving public timeline\n",
723 session->time, session->hostname);
724 break;
725 case ACTION_GROUP:
726 fprintf(log_file, "%s: host=%s retrieving group timeline\n",
727 session->time, session->hostname);
728 break;
729 default:
730 break;
731 }
732
733 fclose(log_file);
734 }
735
736 static char *get_string_from_stdin(void)
737 {
738 char *temp;
739 char *string;
740
741 string = zalloc(1000);
742 if (!string)
743 return NULL;
744
745 if (!fgets(string, 999, stdin))
746 return NULL;
747 temp = strchr(string, '\n');
748 *temp = '\0';
749 return string;
750 }
751
752 static void read_password(char *buf, size_t len, char *host)
753 {
754 char pwd[80];
755 int retval;
756 struct termios old;
757 struct termios tp;
758
759 tcgetattr(0, &tp);
760 old = tp;
761
762 tp.c_lflag &= (~ECHO);
763 tcsetattr(0, TCSANOW, &tp);
764
765 fprintf(stdout, "Enter password for %s: ", host);
766 fflush(stdout);
767 tcflow(0, TCOOFF);
768 retval = scanf("%79s", pwd);
769 tcflow(0, TCOON);
770 fprintf(stdout, "\n");
771
772 tcsetattr(0, TCSANOW, &old);
773
774 strncpy(buf, pwd, len);
775 buf[len-1] = '\0';
776 }
777
778 static int find_urls(const char *tweet, int **pranges)
779 {
780 /*
781 * magic obtained from
782 * http://www.geekpedia.com/KB65_How-to-validate-an-URL-using-RegEx-in-Csharp.html
783 */
784 static const char *re_magic =
785 "(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)/{1,3}"
786 "[0-9a-zA-Z;/~?:@&=+$\\.\\-_'()%]+)"
787 "(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?";
788 pcre *re;
789 const char *errptr;
790 int erroffset;
791 int ovector[10] = {0,};
792 const size_t ovsize = sizeof(ovector)/sizeof(*ovector);
793 int startoffset, tweetlen;
794 int i, rc;
795 int rbound = 10;
796 int rcount = 0;
797 int *ranges = malloc(sizeof(int) * rbound);
798
799 re = pcre_compile(re_magic,
800 PCRE_NO_AUTO_CAPTURE,
801 &errptr, &erroffset, NULL);
802 if (!re) {
803 fprintf(stderr, "pcre_compile @%u: %s\n", erroffset, errptr);
804 exit(1);
805 }
806
807 tweetlen = strlen(tweet);
808 for (startoffset = 0; startoffset < tweetlen; ) {
809
810 rc = pcre_exec(re, NULL, tweet, strlen(tweet), startoffset, 0,
811 ovector, ovsize);
812 if (rc == PCRE_ERROR_NOMATCH)
813 break;
814
815 if (rc < 0) {
816 fprintf(stderr, "pcre_exec @%u: %s\n",
817 erroffset, errptr);
818 exit(1);
819 }
820
821 for (i = 0; i < rc; i += 2) {
822 if ((rcount+2) == rbound) {
823 rbound *= 2;
824 ranges = realloc(ranges, sizeof(int) * rbound);
825 }
826
827 ranges[rcount++] = ovector[i];
828 ranges[rcount++] = ovector[i+1];
829 }
830
831 startoffset = ovector[1];
832 }
833
834 pcre_free(re);
835
836 *pranges = ranges;
837 return rcount;
838 }
839
840 /**
841 * bidirectional popen() call
842 *
843 * @param rwepipe - int array of size three
844 * @param exe - program to run
845 * @param argv - argument list
846 * @return pid or -1 on error
847 *
848 * The caller passes in an array of three integers (rwepipe), on successful
849 * execution it can then write to element 0 (stdin of exe), and read from
850 * element 1 (stdout) and 2 (stderr).
851 */
852 static int popenRWE(int *rwepipe, const char *exe, const char *const argv[])
853 {
854 int in[2];
855 int out[2];
856 int err[2];
857 int pid;
858 int rc;
859
860 rc = pipe(in);
861 if (rc < 0)
862 goto error_in;
863
864 rc = pipe(out);
865 if (rc < 0)
866 goto error_out;
867
868 rc = pipe(err);
869 if (rc < 0)
870 goto error_err;
871
872 pid = fork();
873 if (pid > 0) {
874 /* parent */
875 close(in[0]);
876 close(out[1]);
877 close(err[1]);
878 rwepipe[0] = in[1];
879 rwepipe[1] = out[0];
880 rwepipe[2] = err[0];
881 return pid;
882 } else if (pid == 0) {
883 /* child */
884 close(in[1]);
885 close(out[0]);
886 close(err[0]);
887 close(0);
888 rc = dup(in[0]);
889 close(1);
890 rc = dup(out[1]);
891 close(2);
892 rc = dup(err[1]);
893
894 execvp(exe, (char **)argv);
895 exit(1);
896 } else
897 goto error_fork;
898
899 return pid;
900
901 error_fork:
902 close(err[0]);
903 close(err[1]);
904 error_err:
905 close(out[0]);
906 close(out[1]);
907 error_out:
908 close(in[0]);
909 close(in[1]);
910 error_in:
911 return -1;
912 }
913
914 static int pcloseRWE(int pid, int *rwepipe)
915 {
916 int rc, status;
917 close(rwepipe[0]);
918 close(rwepipe[1]);
919 close(rwepipe[2]);
920 rc = waitpid(pid, &status, 0);
921 return status;
922 }
923
924 static char *shrink_one_url(int *rwepipe, char *big)
925 {
926 int biglen = strlen(big);
927 char *small;
928 int smalllen;
929 int rc;
930
931 rc = dprintf(rwepipe[0], "%s\n", big);
932 if (rc < 0)
933 return big;
934
935 smalllen = biglen + 128;
936 small = malloc(smalllen);
937 if (!small)
938 return big;
939
940 rc = read(rwepipe[1], small, smalllen);
941 if (rc < 0 || rc > biglen)
942 goto error_free_small;
943
944 if (strncmp(small, "http://", 7))
945 goto error_free_small;
946
947 smalllen = rc;
948 while (smalllen && isspace(small[smalllen-1]))
949 small[--smalllen] = 0;
950
951 free(big);
952 return small;
953
954 error_free_small:
955 free(small);
956 return big;
957 }
958
959 static char *shrink_urls(char *text)
960 {
961 int *ranges;
962 int rcount;
963 int i;
964 int inofs = 0;
965 int outofs = 0;
966 const char *const shrink_args[] = {
967 "bti-shrink-urls",
968 NULL
969 };
970 int shrink_pid;
971 int shrink_pipe[3];
972 int inlen = strlen(text);
973
974 dbg("before len=%u\n", inlen);
975
976 shrink_pid = popenRWE(shrink_pipe, shrink_args[0], shrink_args);
977 if (shrink_pid < 0)
978 return text;
979
980 rcount = find_urls(text, &ranges);
981 if (!rcount)
982 return text;
983
984 for (i = 0; i < rcount; i += 2) {
985 int url_start = ranges[i];
986 int url_end = ranges[i+1];
987 int long_url_len = url_end - url_start;
988 char *url = strndup(text + url_start, long_url_len);
989 int short_url_len;
990 int not_url_len = url_start - inofs;
991
992 dbg("long url[%u]: %s\n", long_url_len, url);
993 url = shrink_one_url(shrink_pipe, url);
994 short_url_len = url ? strlen(url) : 0;
995 dbg("short url[%u]: %s\n", short_url_len, url);
996
997 if (!url || short_url_len >= long_url_len) {
998 /* The short url ended up being too long
999 * or unavailable */
1000 if (inofs) {
1001 strncpy(text + outofs, text + inofs,
1002 not_url_len + long_url_len);
1003 }
1004 inofs += not_url_len + long_url_len;
1005 outofs += not_url_len + long_url_len;
1006
1007 } else {
1008 /* copy the unmodified block */
1009 strncpy(text + outofs, text + inofs, not_url_len);
1010 inofs += not_url_len;
1011 outofs += not_url_len;
1012
1013 /* copy the new url */
1014 strncpy(text + outofs, url, short_url_len);
1015 inofs += long_url_len;
1016 outofs += short_url_len;
1017 }
1018
1019 free(url);
1020 }
1021
1022 /* copy the last block after the last match */
1023 if (inofs) {
1024 int tail = inlen - inofs;
1025 if (tail) {
1026 strncpy(text + outofs, text + inofs, tail);
1027 outofs += tail;
1028 }
1029 }
1030
1031 free(ranges);
1032
1033 (void)pcloseRWE(shrink_pid, shrink_pipe);
1034
1035 text[outofs] = 0;
1036 dbg("after len=%u\n", outofs);
1037 return text;
1038 }
1039
1040 int main(int argc, char *argv[], char *envp[])
1041 {
1042 static const struct option options[] = {
1043 { "debug", 0, NULL, 'd' },
1044 { "verbose", 0, NULL, 'V' },
1045 { "account", 1, NULL, 'a' },
1046 { "password", 1, NULL, 'p' },
1047 { "host", 1, NULL, 'H' },
1048 { "proxy", 1, NULL, 'P' },
1049 { "action", 1, NULL, 'A' },
1050 { "user", 1, NULL, 'u' },
1051 { "group", 1, NULL, 'G' },
1052 { "logfile", 1, NULL, 'L' },
1053 { "shrink-urls", 0, NULL, 's' },
1054 { "help", 0, NULL, 'h' },
1055 { "bash", 0, NULL, 'b' },
1056 { "dry-run", 0, NULL, 'n' },
1057 { "page", 1, NULL, 'g' },
1058 { "version", 0, NULL, 'v' },
1059 { }
1060 };
1061 struct session *session;
1062 pid_t child;
1063 char *tweet;
1064 static char password[80];
1065 int retval = 0;
1066 int option;
1067 char *http_proxy;
1068 time_t t;
1069 int page_nr;
1070
1071 debug = 0;
1072 verbose = 0;
1073
1074 session = session_alloc();
1075 if (!session) {
1076 fprintf(stderr, "no more memory...\n");
1077 return -1;
1078 }
1079
1080 /* get the current time so that we can log it later */
1081 time(&t);
1082 session->time = strdup(ctime(&t));
1083 session->time[strlen(session->time)-1] = 0x00;
1084
1085 session->homedir = strdup(getenv("HOME"));
1086
1087 curl_global_init(CURL_GLOBAL_ALL);
1088
1089 /* Set environment variables first, before reading command line options
1090 * or config file values. */
1091 http_proxy = getenv("http_proxy");
1092 if (http_proxy) {
1093 if (session->proxy)
1094 free(session->proxy);
1095 session->proxy = strdup(http_proxy);
1096 dbg("http_proxy = %s\n", session->proxy);
1097 }
1098
1099 parse_configfile(session);
1100
1101 while (1) {
1102 option = getopt_long_only(argc, argv, "dp:P:H:a:A:u:hg:G:snVv",
1103 options, NULL);
1104 if (option == -1)
1105 break;
1106 switch (option) {
1107 case 'd':
1108 debug = 1;
1109 break;
1110 case 'V':
1111 verbose = 1;
1112 break;
1113 case 'a':
1114 if (session->account)
1115 free(session->account);
1116 session->account = strdup(optarg);
1117 dbg("account = %s\n", session->account);
1118 break;
1119 case 'g':
1120 page_nr = atoi(optarg);
1121 dbg("page = %d\n", page_nr);
1122 session->page = page_nr;
1123 break;
1124 case 'p':
1125 if (session->password)
1126 free(session->password);
1127 session->password = strdup(optarg);
1128 dbg("password = %s\n", session->password);
1129 break;
1130 case 'P':
1131 if (session->proxy)
1132 free(session->proxy);
1133 session->proxy = strdup(optarg);
1134 dbg("proxy = %s\n", session->proxy);
1135 break;
1136 case 'A':
1137 if (strcasecmp(optarg, "update") == 0)
1138 session->action = ACTION_UPDATE;
1139 else if (strcasecmp(optarg, "friends") == 0)
1140 session->action = ACTION_FRIENDS;
1141 else if (strcasecmp(optarg, "user") == 0)
1142 session->action = ACTION_USER;
1143 else if (strcasecmp(optarg, "replies") == 0)
1144 session->action = ACTION_REPLIES;
1145 else if (strcasecmp(optarg, "public") == 0)
1146 session->action = ACTION_PUBLIC;
1147 else if (strcasecmp(optarg, "group") == 0)
1148 session->action = ACTION_GROUP;
1149 else
1150 session->action = ACTION_UNKNOWN;
1151 dbg("action = %d\n", session->action);
1152 break;
1153 case 'u':
1154 if (session->user)
1155 free(session->user);
1156 session->user = strdup(optarg);
1157 dbg("user = %s\n", session->user);
1158 break;
1159
1160 case 'G':
1161 if (session->group)
1162 free(session->group);
1163 session->group = strdup(optarg);
1164 dbg("group = %s\n", session->group);
1165 break;
1166 case 'L':
1167 if (session->logfile)
1168 free(session->logfile);
1169 session->logfile = strdup(optarg);
1170 dbg("logfile = %s\n", session->logfile);
1171 break;
1172 case 's':
1173 session->shrink_urls = 1;
1174 break;
1175 case 'H':
1176 if (session->hosturl)
1177 free(session->hosturl);
1178 if (session->hostname)
1179 free(session->hostname);
1180 if (strcasecmp(optarg, "twitter") == 0) {
1181 session->host = HOST_TWITTER;
1182 session->hosturl = strdup(twitter_host);
1183 session->hostname = strdup(twitter_name);
1184 } else if (strcasecmp(optarg, "identica") == 0) {
1185 session->host = HOST_IDENTICA;
1186 session->hosturl = strdup(identica_host);
1187 session->hostname = strdup(identica_name);
1188 } else {
1189 session->host = HOST_CUSTOM;
1190 session->hosturl = strdup(optarg);
1191 session->hostname = strdup(optarg);
1192 }
1193 dbg("host = %d\n", session->host);
1194 break;
1195 case 'b':
1196 session->bash = 1;
1197 break;
1198 case 'h':
1199 display_help();
1200 goto exit;
1201 case 'n':
1202 session->dry_run = 1;
1203 break;
1204 case 'v':
1205 display_version();
1206 goto exit;
1207 default:
1208 display_help();
1209 goto exit;
1210 }
1211 }
1212
1213 /*
1214 * Show the version to make it easier to determine what
1215 * is going on here
1216 */
1217 if (debug)
1218 display_version();
1219
1220 if (session->action == ACTION_UNKNOWN) {
1221 fprintf(stderr, "Unknown action, valid actions are:\n");
1222 fprintf(stderr, "'update', 'friends', 'public', "
1223 "'replies', 'group' or 'user'.\n");
1224 goto exit;
1225 }
1226
1227 if (session->host == HOST_TWITTER && session->action == ACTION_GROUP) {
1228 fprintf(stderr, "Groups only work in Identi.ca.\n");
1229 goto exit;
1230 }
1231
1232 if (session->action == ACTION_GROUP && !session->group) {
1233 fprintf(stdout, "Enter group name: ");
1234 session->group = session->readline(NULL);
1235 }
1236
1237 if (!session->account) {
1238 fprintf(stdout, "Enter account for %s: ", session->hostname);
1239 session->account = session->readline(NULL);
1240 }
1241
1242 if (!session->password) {
1243 read_password(password, sizeof(password), session->hostname);
1244 session->password = strdup(password);
1245 }
1246
1247 if (session->action == ACTION_UPDATE) {
1248 if (session->bash)
1249 tweet = get_string_from_stdin();
1250 else
1251 tweet = session->readline("tweet: ");
1252 if (!tweet || strlen(tweet) == 0) {
1253 dbg("no tweet?\n");
1254 return -1;
1255 }
1256
1257 if (session->shrink_urls)
1258 tweet = shrink_urls(tweet);
1259
1260 session->tweet = zalloc(strlen(tweet) + 10);
1261 if (session->bash)
1262 sprintf(session->tweet, "%c %s",
1263 getuid() ? '$' : '#', tweet);
1264 else
1265 sprintf(session->tweet, "%s", tweet);
1266
1267 free(tweet);
1268 dbg("tweet = %s\n", session->tweet);
1269 }
1270
1271 if (!session->user)
1272 session->user = strdup(session->account);
1273
1274 if (session->page == 0)
1275 session->page = 1;
1276 dbg("account = %s\n", session->account);
1277 dbg("password = %s\n", session->password);
1278 dbg("host = %d\n", session->host);
1279 dbg("action = %d\n", session->action);
1280
1281 /* fork ourself so that the main shell can get on
1282 * with it's life as we try to connect and handle everything
1283 */
1284 if (session->bash) {
1285 child = fork();
1286 if (child) {
1287 dbg("child is %d\n", child);
1288 exit(0);
1289 }
1290 }
1291
1292 retval = send_request(session);
1293 if (retval && !session->bash)
1294 fprintf(stderr, "operation failed\n");
1295
1296 log_session(session, retval);
1297 exit:
1298 session_free(session);
1299 return retval;;
1300 }

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