Coverity fixes
[claws.git] / src / partial_download.c
1 /*
2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2012 Colin Leroy <colin@colino.net> 
4  * and the Claws Mail team
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
18  * 
19  */
20
21 /* Partial download:
22  * A mail which has been completely downloaded will have no special headers,
23  * and its entry in the uidl file will end by 0 (POP3_TOTALLY_RECEIVED);
24  *
25  * A mail which has been partially downloaded will have some special headers,
26  * and its entry in the uidl file will first be 1 (POP3_PARTIALLY_RECEIVED);
27  * the special headers will be including "SC-Marked-For-Download" which can 
28  * have three values:
29  * 0 (POP3_PARTIAL_DLOAD_UNKN) meaning that the user has not yet chosen to
30  *  download the mail or let it be deleted - this header is absent until the
31  *  user first chooses an action
32  * 1 (POP3_PARTIAL_DLOAD_DLOAD) meaning that the user wants to finish 
33  *  downloading the mail
34  * 2 (POP3_PARTIAL_DLOAD_DELE) meaning that the user does not want to finish
35  *  downloading the mail
36  * When updating this header to POP3_PARTIAL_DLOAD_DLOAD, the uidl line of
37  * this mail will end with the mail's physical path, which Sylpheed will remove
38  * after having downloaded the complete mail. msg->partial_recv will equal
39  * 2 (POP3_MUST_COMPLETE_RECV).
40  * When updating this header to POP3_PARTIAL_DLOAD_DELE, the uidl line of
41  * this mail will be 0 (POP3_TOTALLY_RECEIVED), which will let Sylpheed delete
42  * this mail from the server as soon as the leave_time preference specifies.
43  */
44
45 #ifdef HAVE_CONFIG_H
46 #  include "config.h"
47 #include "claws-features.h"
48 #endif
49
50 #include <glib.h>
51 #include <glib/gi18n.h>
52 #include <stdio.h>
53 #include <string.h>
54 #include <stdarg.h>
55 #include <ctype.h>
56 #include <unistd.h>
57 #include <time.h>
58 #include <errno.h>
59
60 #include "partial_download.h"
61 #include "utils.h"
62 #include "pop.h"
63 #include "folder.h"
64 #include "procheader.h"
65 #include "msgcache.h"
66
67 int partial_msg_in_uidl_list(MsgInfo *msginfo)
68 {
69         gchar *path;
70         FILE *fp;
71         gchar buf[POPBUFSIZE];
72         gchar uidl[POPBUFSIZE];
73         time_t recv_time;
74         time_t now;
75         gchar *sanitized_uid = NULL;
76         
77         if (!msginfo->extradata)
78                 return FALSE;
79
80         sanitized_uid = g_strdup(msginfo->extradata->account_login);
81         
82         subst_for_filename(sanitized_uid);
83
84         if (!msginfo->extradata->account_server
85         ||  !msginfo->extradata->account_login
86         ||  !msginfo->extradata->partial_recv)
87                 return FALSE;
88         
89         path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
90                            "uidl", G_DIR_SEPARATOR_S, msginfo->extradata->account_server,
91                            "-", msginfo->extradata->account_login, NULL);
92         if ((fp = g_fopen(path, "rb")) == NULL) {
93                 if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
94                 g_free(path);
95                 path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
96                                    "uidl-", msginfo->extradata->account_server,
97                                    "-", sanitized_uid, NULL);
98                 if ((fp = g_fopen(path, "rb")) == NULL) {
99                         if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
100                         g_free(sanitized_uid);
101                         g_free(path);
102                         return FALSE;
103                 }
104         }
105         g_free(sanitized_uid);
106         g_free(path);
107
108         now = time(NULL);
109
110         while (fgets(buf, sizeof(buf), fp) != NULL) {
111                 gchar tmp[POPBUFSIZE];
112                 strretchomp(buf);
113                 recv_time = RECV_TIME_NONE;
114                 
115                 if (sscanf(buf, "%s\t%ld\t%s", uidl, (long int *) &recv_time, 
116                            tmp) < 2) {
117                         if (sscanf(buf, "%s", uidl) != 1)
118                                 continue;
119                         else {
120                                 recv_time = now;
121                         }
122                 }
123                 if (!strcmp(uidl, msginfo->extradata->partial_recv)) {
124                         fclose(fp);
125                         return TRUE;
126                 }
127         }
128
129         fclose(fp);     
130         return FALSE;
131 }
132
133 static int partial_uidl_mark_mail(MsgInfo *msginfo, int download)
134 {
135         gchar *path;
136         gchar *pathnew;
137         FILE *fp;
138         FILE *fpnew;
139         gchar buf[POPBUFSIZE];
140         gchar uidl[POPBUFSIZE];
141         time_t recv_time;
142         time_t now;
143         gchar partial_recv[POPBUFSIZE];
144         int err = -1;
145         gchar *filename;
146         MsgInfo *tinfo;
147         gchar *sanitized_uid = NULL;    
148
149         filename = procmsg_get_message_file_path(msginfo);
150         if (!filename) {
151                 g_warning("can't get message file path.\n");
152                 return err;
153         }
154         tinfo = procheader_parse_file(filename, msginfo->flags, TRUE, TRUE);
155         
156         if (!tinfo->extradata) {
157                 g_free(filename);
158                 return err;
159         }
160
161         sanitized_uid = g_strdup(tinfo->extradata->account_login);
162         subst_for_filename(sanitized_uid);
163
164         if (!tinfo->extradata->account_server
165         ||  !tinfo->extradata->account_login
166         ||  !tinfo->extradata->partial_recv) {
167                 goto bail;
168         }
169         path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
170                            "uidl", G_DIR_SEPARATOR_S, tinfo->extradata->account_server,
171                            "-", sanitized_uid, NULL);
172
173         if ((fp = g_fopen(path, "rb")) == NULL) {
174                 perror("fopen1");
175                 if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
176                 g_free(path);
177                 path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
178                                    "uidl-", tinfo->extradata->account_server,
179                                    "-", tinfo->extradata->account_login, NULL);
180                 if ((fp = g_fopen(path, "rb")) == NULL) {
181                         if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
182                         g_free(path);
183                         goto bail;
184                 }
185         }
186
187         pathnew = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
188                            "uidl", G_DIR_SEPARATOR_S, tinfo->extradata->account_server,
189                            "-", sanitized_uid, ".new", NULL);
190         
191         g_free(sanitized_uid);
192
193         if ((fpnew = g_fopen(pathnew, "wb")) == NULL) {
194                 perror("fopen2");
195                 fclose(fp);
196                 g_free(pathnew);
197                 goto bail;
198         }
199         
200         now = time(NULL);
201
202         while (fgets(buf, sizeof(buf), fp) != NULL) {
203                 strretchomp(buf);
204                 recv_time = RECV_TIME_NONE;
205                 sprintf(partial_recv,"0");
206                 
207                 if (sscanf(buf, "%s\t%ld\t%s", 
208                            uidl, (long int *) &recv_time, partial_recv) < 2) {
209                         if (sscanf(buf, "%s", uidl) != 1)
210                                 continue;
211                         else {
212                                 recv_time = now;
213                         }
214                 }
215                 if (strcmp(tinfo->extradata->partial_recv, uidl)) {
216                         if (fprintf(fpnew, "%s\t%ld\t%s\n", 
217                                 uidl, (long int) recv_time, partial_recv) < 0) {
218                                 FILE_OP_ERROR(pathnew, "fprintf");
219                                 fclose(fpnew);
220                                 fclose(fp);
221                                 g_free(path);
222                                 g_free(pathnew);
223                                 goto bail;
224                         }
225                 } else {
226                         gchar *stat = NULL;
227                         if (download == POP3_PARTIAL_DLOAD_DLOAD) {
228                                 gchar *folder_id = folder_item_get_identifier(
229                                                         msginfo->folder);
230                                 stat = g_strdup_printf("%s:%d",
231                                         folder_id, msginfo->msgnum);
232                                 g_free(folder_id);
233                         }
234                         else if (download == POP3_PARTIAL_DLOAD_UNKN)
235                                 stat = g_strdup("1");
236                         else if (download == POP3_PARTIAL_DLOAD_DELE)
237                                 stat = g_strdup("0");
238                         
239                         if (fprintf(fpnew, "%s\t%ld\t%s\n", 
240                                 uidl, (long int) recv_time, stat) < 0) {
241                                 FILE_OP_ERROR(pathnew, "fprintf");
242                                 fclose(fpnew);
243                                 fclose(fp);
244                                 g_free(path);
245                                 g_free(pathnew);
246                                 goto bail;
247                         }
248                         g_free(stat);
249                 }
250         }
251         if (fclose(fpnew) == EOF) {
252                 FILE_OP_ERROR(pathnew, "fclose");
253                 fclose(fp);
254                 g_free(path);
255                 g_free(pathnew);
256                 goto bail;
257         }
258         fclose(fp);
259
260         move_file(pathnew, path, TRUE);
261
262         g_free(path);
263         g_free(pathnew);
264         
265         if ((fp = g_fopen(filename,"rb")) == NULL) {
266                 perror("fopen3");
267                 goto bail;
268         }
269         pathnew = g_strdup_printf("%s.new", filename);
270         if ((fpnew = g_fopen(pathnew, "wb")) == NULL) {
271                 perror("fopen4");
272                 fclose(fp);
273                 g_free(pathnew);
274                 goto bail;
275         }
276         
277         if (fprintf(fpnew, "SC-Marked-For-Download: %d\n", 
278                         download) < 0) {
279                 FILE_OP_ERROR(pathnew, "fprintf");
280                 fclose(fpnew);
281                 fclose(fp);
282                 g_free(pathnew);
283                 goto bail;
284         }
285         while (fgets(buf, sizeof(buf)-1, fp) != NULL) {
286                 if(strlen(buf) > strlen("SC-Marked-For-Download: x\n")
287                 && !strncmp(buf, "SC-Marked-For-Download:", 
288                             strlen("SC-Marked-For-Download:"))) {
289                         if (fprintf(fpnew, "%s", 
290                          buf+strlen("SC-Marked-For-Download: x\n")) < 0) {
291                                 FILE_OP_ERROR(pathnew, "fprintf");
292                                 fclose(fpnew);
293                                 fclose(fp);
294                                 g_free(pathnew);
295                                 goto bail;
296                         }
297                         continue;
298                 } else if (strlen(buf) == strlen("SC-Marked-For-Download: x\n")
299                 && !strncmp(buf, "SC-Marked-For-Download:", 
300                             strlen("SC-Marked-For-Download:"))) {
301                         continue;
302                 }
303                 if (fprintf(fpnew, "%s", buf) < 0) {
304                         FILE_OP_ERROR(pathnew, "fprintf");
305                         fclose(fpnew);
306                         fclose(fp);
307                         g_free(pathnew);
308                         goto bail;
309                 }
310         }
311         if (fclose(fpnew) == EOF) {
312                 FILE_OP_ERROR(pathnew, "fclose");
313                 fclose(fp);
314                 g_free(pathnew);
315                 goto bail;
316         }
317
318         fclose(fp);
319         rename_force(pathnew, filename);
320         g_free(pathnew);
321         msginfo->planned_download = download;
322         msgcache_update_msg(msginfo->folder->cache, msginfo);
323
324         err = 0;
325 bail:
326         g_free(filename);
327         procmsg_msginfo_free(tinfo);
328         
329         return err;
330 }
331  
332 int partial_mark_for_delete(MsgInfo *msginfo)
333 {
334         return partial_uidl_mark_mail(msginfo, POP3_PARTIAL_DLOAD_DELE);
335 }
336
337 int partial_mark_for_download(MsgInfo *msginfo)
338 {
339         return partial_uidl_mark_mail(msginfo, POP3_PARTIAL_DLOAD_DLOAD);
340 }
341
342 int partial_unmark(MsgInfo *msginfo)
343 {
344         return partial_uidl_mark_mail(msginfo, POP3_PARTIAL_DLOAD_UNKN);
345 }
346
347 void partial_delete_old(const gchar *file) 
348 {
349         gchar *id = g_strdup(file);
350         gchar *snum = strrchr(file, ':');
351         int num = 0;
352         FolderItem *item = NULL;
353
354         debug_print("too big message updated, should remove %s\n", file?file:"(null)");
355
356         if (snum) {
357                 snum++;
358         } else {
359                 g_free(id);
360                 return; /* not a real problem */
361         }
362
363         num = atoi(snum);
364
365         if (strrchr(id, ':'))
366                 *(strrchr(id, ':'))='\0';
367
368         item = folder_find_item_from_identifier(id);
369         if (item) {
370                 debug_print("removing %d in %s\n", num, id);
371                 folder_item_remove_msg(item, num);
372         } 
373         g_free(id);
374 }
375
376 gchar *partial_get_filename(const gchar *server, const gchar *login,
377                                    const gchar *muidl)
378 {
379         gchar *path;
380         gchar *result = NULL;
381         FILE *fp;
382         gchar buf[POPBUFSIZE];
383         gchar uidl[POPBUFSIZE];
384         time_t recv_time;
385         time_t now;
386         gchar *sanitized_uid = g_strdup(login); 
387
388         subst_for_filename(sanitized_uid);
389
390         path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
391                            "uidl", G_DIR_SEPARATOR_S, 
392                            server, "-", sanitized_uid, NULL);
393         if ((fp = g_fopen(path, "rb")) == NULL) {
394                 if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
395                 g_free(path);
396                 path = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
397                                    "uidl-", server,
398                                    "-", sanitized_uid, NULL);
399                 if ((fp = g_fopen(path, "rb")) == NULL) {
400                         if (ENOENT != errno) FILE_OP_ERROR(path, "fopen");
401                         g_free(sanitized_uid);
402                         g_free(path);
403                         return result;
404                 }
405         }
406         g_free(sanitized_uid);
407         g_free(path);
408
409         now = time(NULL);
410
411         while (fgets(buf, sizeof(buf), fp) != NULL) {
412                 gchar tmp[POPBUFSIZE];
413                 strretchomp(buf);
414                 recv_time = RECV_TIME_NONE;
415                 
416                 if (sscanf(buf, "%s\t%ld\t%s", uidl, (long int *) &recv_time, 
417                            tmp) < 2) {
418                         if (sscanf(buf, "%s", uidl) != 1)
419                                 continue;
420                         else {
421                                 recv_time = now;
422                         }
423                 }
424                 if (!strcmp(muidl, uidl)) {
425                         result = g_strdup(tmp);
426                         break;
427                 }
428         }
429
430         fclose(fp);
431         
432         return result;
433 }
434