[svn-inject] Installing original source of bti
[debian/bti.git] / bti.c
1 /*
2  * Copyright (C) 2008 Greg Kroah-Hartman <greg@kroah.com>
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the
6  * Free Software Foundation version 2 of the License.
7  *
8  * This program is distributed in the hope that it will be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11  * General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
16  */
17
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <stddef.h>
21 #include <string.h>
22 #include <getopt.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <fcntl.h>
26 #include <unistd.h>
27 #include <sys/stat.h>
28 #include <curl/curl.h>
29 #include "bti_version.h"
30
31
32 #define zalloc(size)    calloc(size, 1)
33
34 #define dbg(format, arg...)                                             \
35         do {                                                            \
36                 if (debug)                                              \
37                         printf("%s: " format , __func__ , ## arg );     \
38         } while (0)
39
40
41 static int debug = 0;
42
43 enum host {
44         HOST_TWITTER = 0,
45         HOST_IDENTICA = 1,
46 };
47
48 struct session {
49         char *password;
50         char *account;
51         char *tweet;
52         int bash;
53         enum host host;
54 };
55
56 struct bti_curl_buffer {
57         char *data;
58         int length;
59 };
60
61 static void display_help(void)
62 {
63         fprintf(stdout, "bti - send tweet to twitter\n");
64         fprintf(stdout, "Version: " BTI_VERSION "\n");
65         fprintf(stdout, "Usage:\n");
66         fprintf(stdout, "  bti [options]\n");
67         fprintf(stdout, "options are:\n");
68         fprintf(stdout, "  --account accountname\n");
69         fprintf(stdout, "  --password password\n");
70         fprintf(stdout, "  --host HOST\n");
71         fprintf(stdout, "  --bash\n");
72         fprintf(stdout, "  --debug\n");
73         fprintf(stdout, "  --version\n");
74         fprintf(stdout, "  --help\n");
75 }
76
77 static void display_version(void)
78 {
79         fprintf(stdout, "bti - version %s\n", BTI_VERSION);
80 }
81
82 static char *get_string_from_stdin(void)
83 {
84         char *temp;
85         char *string;
86
87         string = zalloc(1000);
88         if (!string)
89                 return NULL;
90
91         if (!fgets(string, 999, stdin))
92                 return NULL;
93         temp = strchr(string, '\n');
94         *temp = '\0';
95         return string;
96 }
97
98 static struct session *session_alloc(void)
99 {
100         struct session *session;
101
102         session = zalloc(sizeof(*session));
103         if (!session)
104                 return NULL;
105         return session;
106 }
107
108 static void session_free(struct session *session)
109 {
110         if (!session)
111                 return;
112         free(session->password);
113         free(session->account);
114         free(session->tweet);
115         free(session);
116 }
117
118 static struct bti_curl_buffer *bti_curl_buffer_alloc(void)
119 {
120         struct bti_curl_buffer *buffer;
121
122         buffer = zalloc(sizeof(*buffer));
123         if (!buffer)
124                 return NULL;
125
126         /* start out with a data buffer of 1 byte to
127          * make the buffer fill logic simpler */
128         buffer->data = zalloc(1);
129         if (!buffer->data) {
130                 free(buffer);
131                 return NULL;
132         }
133         buffer->length = 0;
134         return buffer;
135 }
136
137 static void bti_curl_buffer_free(struct bti_curl_buffer *buffer)
138 {
139         if (!buffer)
140                 return;
141         free(buffer->data);
142         free(buffer);
143 }
144
145 static const char *twitter_url = "https://twitter.com/statuses/update.xml";
146 static const char *identica_url = "http://identi.ca/api/statuses/update.xml";
147
148 static CURL *curl_init(void)
149 {
150         CURL *curl;
151
152         curl = curl_easy_init();
153         if (!curl) {
154                 fprintf(stderr, "Can not init CURL!\n");
155                 return NULL;
156         }
157         /* some ssl sanity checks on the connection we are making */
158         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
159         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
160         return curl;
161 }
162
163 size_t curl_callback(void *buffer, size_t size, size_t nmemb, void *userp)
164 {
165         struct bti_curl_buffer *curl_buf = userp;
166         size_t buffer_size = size * nmemb;
167         char *temp;
168
169         if ((!buffer) || (!buffer_size) || (!curl_buf))
170                 return -EINVAL;
171
172         /* add to the data we already have */
173         temp = zalloc(curl_buf->length + buffer_size + 1);
174         if (!temp)
175                 return -ENOMEM;
176
177         memcpy(temp, curl_buf->data, curl_buf->length);
178         free(curl_buf->data);
179         curl_buf->data = temp;
180         memcpy(&curl_buf->data[curl_buf->length], (char *)buffer, buffer_size);
181         curl_buf->length += buffer_size;
182
183         dbg("%s\n", curl_buf->data);
184
185         return buffer_size;
186 }
187
188 static int send_tweet(struct session *session)
189 {
190         char user_password[500];
191         char data[500];
192         struct bti_curl_buffer *curl_buf;
193         CURL *curl = NULL;
194         CURLcode res;
195         struct curl_httppost *formpost = NULL;
196         struct curl_httppost *lastptr = NULL;
197
198         if (!session)
199                 return -EINVAL;
200
201         curl_buf = bti_curl_buffer_alloc();
202         if (!curl_buf)
203                 return -ENOMEM;
204
205         snprintf(user_password, sizeof(user_password), "%s:%s",
206                  session->account, session->password);
207         snprintf(data, sizeof(data), "status=\"%s\"", session->tweet);
208
209         curl = curl_init();
210         if (!curl)
211                 return -EINVAL;
212
213         curl_formadd(&formpost, &lastptr,
214                      CURLFORM_COPYNAME, "status",
215                      CURLFORM_COPYCONTENTS, session->tweet,
216                      CURLFORM_END);
217
218         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
219
220         switch (session->host) {
221         case HOST_TWITTER:
222                 curl_easy_setopt(curl, CURLOPT_URL, twitter_url);
223                 break;
224         case HOST_IDENTICA:
225                 curl_easy_setopt(curl, CURLOPT_URL, identica_url);
226                 break;
227         }
228
229         if (debug)
230                 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
231         curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
232
233         dbg("user_password = %s\n", user_password);
234         dbg("data = %s\n", data);
235
236         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
237         curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl_buf);
238         res = curl_easy_perform(curl);
239         if (res && !session->bash) {
240                 fprintf(stderr, "error(%d) trying to send tweet\n", res);
241                 return -EINVAL;
242         }
243
244         curl_easy_cleanup(curl);
245         curl_formfree(formpost);
246         bti_curl_buffer_free(curl_buf);
247         return 0;
248 }
249
250 static void parse_configfile(struct session *session)
251 {
252         FILE *config_file;
253         char *line = NULL;
254         size_t len = 0;
255         char *account = NULL;
256         char *password = NULL;
257         char *host = NULL;
258         char *file;
259         char *home = getenv("HOME");
260
261         /* config file is ~/.bti  */
262         file = alloca(strlen(home) + 7);
263
264         sprintf(file, "%s/.bti", home);
265
266         config_file = fopen(file, "r");
267
268         /* No error if file does not exist or is unreadable.  */
269         if (config_file == NULL)
270                 return;
271
272         do {
273                 ssize_t n = getline(&line, &len, config_file);
274                 if (n < 0)
275                         break;
276                 if (line[n - 1] == '\n')
277                         line[n - 1] = '\0';
278                 /* Parse file.  Format is the usual value pairs:
279                    account=name
280                    passwort=value
281                    # is a comment character
282                 */
283                 *strchrnul(line, '#') = '\0';
284                 char *c = line;
285                 while (isspace(*c))
286                         c++;
287                 /* Ignore blank lines.  */
288                 if (c[0] == '\0')
289                         continue;
290
291                 if (!strncasecmp(c, "account", 7) && (c[7] == '=')) {
292                         c += 8;
293                         if (c[0] != '\0')
294                                 account = strdup(c);
295                 } else if (!strncasecmp(c, "password", 8) &&
296                            (c[8] == '=')) {
297                         c += 9;
298                         if (c[0] != '\0')
299                                 password = strdup(c);
300                 } else if (!strncasecmp(c, "host", 4) &&
301                            (c[4] == '=')) {
302                         c += 5;
303                         if (c[0] != '\0')
304                                 host = strdup(c);
305                 }
306         } while (!feof(config_file));
307
308         if (password)
309                 session->password = password;
310         if (account)
311                 session->account = account;
312         if (host) {
313                 if (strcasecmp(host, "twitter") == 0)
314                         session->host = HOST_TWITTER;
315                 if (strcasecmp(host, "identica") == 0)
316                         session->host = HOST_IDENTICA;
317                 free(host);
318         }
319
320         /* Free buffer and close file.  */
321         free(line);
322         fclose(config_file);
323 }
324
325 int main(int argc, char *argv[], char *envp[])
326 {
327         static const struct option options[] = {
328                 { "debug", 0, NULL, 'd' },
329                 { "account", 1, NULL, 'a' },
330                 { "password", 1, NULL, 'p' },
331                 { "host", 1, NULL, 'H' },
332                 { "help", 0, NULL, 'h' },
333                 { "bash", 0, NULL, 'b' },
334                 { "version", 0, NULL, 'v' },
335                 { }
336         };
337         struct session *session;
338         pid_t child;
339         char *tweet;
340         int retval;
341         int option;
342 #if 0
343         char *home = getenv("HOME");
344         char *pwd = getenv("PWD");
345         char *dir;
346 #endif
347         session = session_alloc();
348         if (!session) {
349                 fprintf(stderr, "no more memory...\n");
350                 return -1;
351         }
352
353         curl_global_init(CURL_GLOBAL_ALL);
354         parse_configfile(session);
355
356         while (1) {
357                 option = getopt_long_only(argc, argv, "dqe:p:H:a:h",
358                                           options, NULL);
359                 if (option == -1)
360                         break;
361                 switch (option) {
362                 case 'd':
363                         debug = 1;
364                         break;
365                 case 'a':
366                         if (session->account)
367                                 free(session->account);
368                         session->account = strdup(optarg);
369                         dbg("account = %s\n", session->account);
370                         break;
371                 case 'p':
372                         if (session->password)
373                                 free(session->password);
374                         session->password = strdup(optarg);
375                         dbg("password = %s\n", session->password);
376                         break;
377                 case 'H':
378                         if (strcasecmp(optarg, "twitter") == 0)
379                                 session->host = HOST_TWITTER;
380                         if (strcasecmp(optarg, "identica") == 0)
381                                 session->host = HOST_IDENTICA;
382                         dbg("host = %d\n", session->host);
383                         break;
384                 case 'b':
385                         session->bash= 1;
386                         break;
387                 case 'h':
388                         display_help();
389                         goto exit;
390                 case 'v':
391                         display_version();
392                         goto exit;
393                 default:
394                         display_help();
395                         goto exit;
396                 }
397         }
398
399         if (!session->account) {
400                 fprintf(stdout, "Enter twitter account: ");
401                 session->account = get_string_from_stdin();
402         }
403
404         if (!session->password) {
405                 fprintf(stdout, "Enter twitter password: ");
406                 session->password = get_string_from_stdin();
407         }
408 #if 0
409         /* get the current working directory basename */
410         if (strcmp(pwd, home) == 0)
411                 dir = "~";
412         else {
413                 dir = strrchr(pwd, '/');
414                 if (dir)
415                         dir++;
416                 else
417                         dir = "?";
418         }
419 #endif
420         tweet = get_string_from_stdin();
421         if (strlen(tweet) == 0) {
422                 dbg("no tweet?\n");
423                 return -1;
424         }
425
426 //      session->tweet = zalloc(strlen(tweet) + strlen(dir) + 10);
427         session->tweet = zalloc(strlen(tweet) + 10);
428
429         /* if --bash is specified, add the "PWD $ " to
430          * the start of the tweet. */
431         if (session->bash)
432 //              sprintf(session->tweet, "%s $ %s", dir, tweet);
433                 sprintf(session->tweet, "$ %s", tweet);
434         else
435                 sprintf(session->tweet, "%s", tweet);
436         free(tweet);
437
438         dbg("account = %s\n", session->account);
439         dbg("password = %s\n", session->password);
440         dbg("tweet = %s\n", session->tweet);
441         dbg("host = %d\n", session->host);
442
443         /* fork ourself so that the main shell can get on
444          * with it's life as we try to connect and handle everything
445          */
446         if (session->bash) {
447                 child = fork();
448                         if (child) {
449                         dbg("child is %d\n", child);
450                         exit(0);
451                 }
452         }
453
454         retval = send_tweet(session);
455         if (retval && !session->bash) {
456                 fprintf(stderr, "tweet failed\n");
457                 return -1;
458         }
459
460         session_free(session);
461 exit:
462         return 0;
463 }