src/mbox.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <fcntl.h>
  31 #include <sys/file.h>
  32 #include <ctype.h>
  33 #include <time.h>
  34
  35 #include "intl.h"
  36 #include "mbox.h"
  37 #include "procmsg.h"
  38 #include "folder.h"
  39 #include "prefs_common.h"
  40 #include "prefs_account.h"
  41 #include "account.h"
  42 #include "utils.h"
  43 #include "filtering.h"
  44
  45 #define MSGBUFSIZE      8192
  46
  47 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  48 { \
  49         if (fputs(s, tmp_fp) == EOF) { \
  50                 g_warning("can't write to temporary file\n"); \
  51                 fclose(tmp_fp); \
  52                 fclose(mbox_fp); \
  53                 unlink(tmp_file); \
  54                 g_free(tmp_file); \
  55                 return -1; \
  56         } \
  57 }
  58
  59 gint proc_mbox(FolderItem *dest, const gchar *mbox)
  60 {
  61         FILE *mbox_fp;
  62         gchar buf[MSGBUFSIZE], from_line[MSGBUFSIZE];
  63         gchar *tmp_file;
  64         gint msgs = 0;
  65
  66         g_return_val_if_fail(dest != NULL, -1);
  67         g_return_val_if_fail(mbox != NULL, -1);
  68
  69         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  70
  71         if ((mbox_fp = fopen(mbox, "rb")) == NULL) {
  72                 FILE_OP_ERROR(mbox, "fopen");
  73                 return -1;
  74         }
  75
  76         /* ignore empty lines on the head */
  77         do {
  78                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  79                         g_warning("can't read mbox file.\n");
  80                         fclose(mbox_fp);
  81                         return -1;
  82                 }
  83         } while (buf[0] == '\n' || buf[0] == '\r');
  84
  85         if (strncmp(buf, "From ", 5) != 0) {
  86                 g_warning("invalid mbox format: %s\n", mbox);
  87                 fclose(mbox_fp);
  88                 return -1;
  89         }
  90
  91         strcpy(from_line, buf);
  92         if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  93                 g_warning("malformed mbox: %s\n", mbox);
  94                 fclose(mbox_fp);
  95                 return -1;
  96         }
  97
  98         tmp_file = get_tmp_file();
  99
 100         folder_item_update_freeze();
 101
 102         do {
 103                 FILE *tmp_fp;
 104                 FolderItem *dropfolder;
 105                 gint empty_line;
 106                 gboolean is_next_msg = FALSE;
 107                 gint msgnum;
 108
 109                 if ((tmp_fp = fopen(tmp_file, "wb")) == NULL) {
 110                         FILE_OP_ERROR(tmp_file, "fopen");
 111                         g_warning("can't open temporary file\n");
 112                         fclose(mbox_fp);
 113                         g_free(tmp_file);
 114                         return -1;
 115                 }
 116                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0)
 117                         FILE_OP_ERROR(tmp_file, "chmod");
 118
 119                 /* convert unix From into Return-Path */
 120                 /*
 121                 startp = from_line + 5;
 122                 endp = strchr(startp, ' ');
 123                 if (endp == NULL)
 124                         rpath = g_strdup(startp);
 125                 else
 126                         rpath = g_strndup(startp, endp - startp);
 127                 g_strstrip(rpath);
 128                 g_snprintf(from_line, sizeof(from_line),
 129                            "Return-Path: %s\n", rpath);
 130                 g_free(rpath);
 131                 */
 132
 133                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 134                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 135                 from_line[0] = '\0';
 136
 137                 empty_line = 0;
 138
 139                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 140                         if (buf[0] == '\n' || buf[0] == '\r') {
 141                                 empty_line++;
 142                                 buf[0] = '\0';
 143                                 continue;
 144                         }
 145
 146                         /* From separator */
 147                         while (!strncmp(buf, "From ", 5)) {
 148                                 strcpy(from_line, buf);
 149                                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 150                                         buf[0] = '\0';
 151                                         break;
 152                                 }
 153
 154                                 if (is_header_line(buf)) {
 155                                         is_next_msg = TRUE;
 156                                         break;
 157                                 } else if (!strncmp(buf, "From ", 5)) {
 158                                         continue;
 159                                 } else if (!strncmp(buf, ">From ", 6)) {
 160                                         g_memmove(buf, buf + 1, strlen(buf));
 161                                         is_next_msg = TRUE;
 162                                         break;
 163                                 } else {
 164                                         g_warning("unescaped From found:\n%s",
 165                                                   from_line);
 166                                         break;
 167                                 }
 168                         }
 169                         if (is_next_msg) break;
 170
 171                         if (empty_line > 0) {
 172                                 while (empty_line--)
 173                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 174                                 empty_line = 0;
 175                         }
 176
 177                         if (from_line[0] != '\0') {
 178                                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 179                                 from_line[0] = '\0';
 180                         }
 181
 182                         if (buf[0] != '\0') {
 183                                 if (!strncmp(buf, ">From ", 6)) {
 184                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 185                                 } else
 186                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 187
 188                                 buf[0] = '\0';
 189                         }
 190                 }
 191
 192                 if (empty_line > 0) {
 193                         while (--empty_line)
 194                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 195                 }
 196
 197                 if (fclose(tmp_fp) == EOF) {
 198                         FILE_OP_ERROR(tmp_file, "fclose");
 199                         g_warning("can't write to temporary file\n");
 200                         fclose(mbox_fp);
 201                         unlink(tmp_file);
 202                         g_free(tmp_file);
 203                         return -1;
 204                 }
 205
 206                 dropfolder = folder_get_default_processing();
 207
 208                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, TRUE)) < 0) {
 209                         fclose(mbox_fp);
 210                         unlink(tmp_file);
 211                         g_free(tmp_file);
 212                         return -1;
 213                 }
 214
 215                 filter_message(global_processing, dest,
 216                                msgnum);
 217
 218                 msgs++;
 219         } while (from_line[0] != '\0');
 220
 221         folder_item_update_thaw();
 222
 223         g_free(tmp_file);
 224         fclose(mbox_fp);
 225         debug_print("%d messages found.\n", msgs);
 226
 227         return msgs;
 228 }
 229
 230 gint lock_mbox(const gchar *base, LockType type)
 231 {
 232         gint retval = 0;
 233
 234         if (type == LOCK_FILE) {
 235                 gchar *lockfile, *locklink;
 236                 gint retry = 0;
 237                 FILE *lockfp;
 238
 239                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 240                 if ((lockfp = fopen(lockfile, "wb")) == NULL) {
 241                         FILE_OP_ERROR(lockfile, "fopen");
 242                         g_warning("can't create lock file %s\n", lockfile);
 243                         g_warning("use 'flock' instead of 'file' if possible.\n");
 244                         g_free(lockfile);
 245                         return -1;
 246                 }
 247
 248                 fprintf(lockfp, "%d\n", getpid());
 249                 fclose(lockfp);
 250
 251                 locklink = g_strconcat(base, ".lock", NULL);
 252                 while (link(lockfile, locklink) < 0) {
 253                         FILE_OP_ERROR(lockfile, "link");
 254                         if (retry >= 5) {
 255                                 g_warning("can't create %s\n", lockfile);
 256                                 unlink(lockfile);
 257                                 g_free(lockfile);
 258                                 return -1;
 259                         }
 260                         if (retry == 0)
 261                                 g_warning("mailbox is owned by another"
 262                                             " process, waiting...\n");
 263                         retry++;
 264                         sleep(5);
 265                 }
 266                 unlink(lockfile);
 267                 g_free(lockfile);
 268         } else if (type == LOCK_FLOCK) {
 269                 gint lockfd;
 270
 271 #if HAVE_FLOCK
 272                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 273 #else
 274                 if ((lockfd = open(base, O_RDWR)) < 0) {
 275 #endif
 276                         FILE_OP_ERROR(base, "open");
 277                         return -1;
 278                 }
 279 #if HAVE_FLOCK
 280                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 281                         perror("flock");
 282 #else
 283 #if HAVE_LOCKF
 284                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 285                         perror("lockf");
 286 #else
 287                 {
 288 #endif
 289 #endif /* HAVE_FLOCK */
 290                         g_warning("can't lock %s\n", base);
 291                         if (close(lockfd) < 0)
 292                                 perror("close");
 293                         return -1;
 294                 }
 295                 retval = lockfd;
 296         } else {
 297                 g_warning("invalid lock type\n");
 298                 return -1;
 299         }
 300
 301         return retval;
 302 }
 303
 304 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 305 {
 306         if (type == LOCK_FILE) {
 307                 gchar *lockfile;
 308
 309                 lockfile = g_strconcat(base, ".lock", NULL);
 310                 if (unlink(lockfile) < 0) {
 311                         FILE_OP_ERROR(lockfile, "unlink");
 312                         g_free(lockfile);
 313                         return -1;
 314                 }
 315                 g_free(lockfile);
 316
 317                 return 0;
 318         } else if (type == LOCK_FLOCK) {
 319 #if HAVE_FLOCK
 320                 if (flock(fd, LOCK_UN) < 0) {
 321                         perror("flock");
 322 #else
 323 #if HAVE_LOCKF
 324                 if (lockf(fd, F_ULOCK, 0) < 0) {
 325                         perror("lockf");
 326 #else
 327                 {
 328 #endif
 329 #endif /* HAVE_FLOCK */
 330                         g_warning("can't unlock %s\n", base);
 331                         if (close(fd) < 0)
 332                                 perror("close");
 333                         return -1;
 334                 }
 335
 336                 if (close(fd) < 0) {
 337                         perror("close");
 338                         return -1;
 339                 }
 340
 341                 return 0;
 342         }
 343
 344         g_warning("invalid lock type\n");
 345         return -1;
 346 }
 347
 348 gint copy_mbox(const gchar *src, const gchar *dest)
 349 {
 350         return copy_file(src, dest, TRUE);
 351 }
 352
 353 void empty_mbox(const gchar *mbox)
 354 {
 355         if (truncate(mbox, 0) < 0) {
 356                 FILE *fp;
 357
 358                 FILE_OP_ERROR(mbox, "truncate");
 359                 if ((fp = fopen(mbox, "wb")) == NULL) {
 360                         FILE_OP_ERROR(mbox, "fopen");
 361                         g_warning("can't truncate mailbox to zero.\n");
 362                         return;
 363                 }
 364                 fclose(fp);
 365         }
 366 }
 367
 368 /* read all messages in SRC, and store them into one MBOX file. */
 369 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 370 {
 371         GSList *mlist;
 372         GSList *cur;
 373         MsgInfo *msginfo;
 374         FILE *msg_fp;
 375         FILE *mbox_fp;
 376         gchar buf[BUFFSIZE];
 377
 378         g_return_val_if_fail(src != NULL, -1);
 379         g_return_val_if_fail(src->folder != NULL, -1);
 380         g_return_val_if_fail(mbox != NULL, -1);
 381
 382         debug_print("Exporting messages from %s into %s...\n",
 383                     src->path, mbox);
 384
 385         if ((mbox_fp = fopen(mbox, "wb")) == NULL) {
 386                 FILE_OP_ERROR(mbox, "fopen");
 387                 return -1;
 388         }
 389
 390         mlist = folder_item_get_msg_list(src);
 391
 392         for (cur = mlist; cur != NULL; cur = cur->next) {
 393                 msginfo = (MsgInfo *)cur->data;
 394
 395                 msg_fp = procmsg_open_message(msginfo);
 396                 if (!msg_fp) {
 397                         procmsg_msginfo_free(msginfo);
 398                         continue;
 399                 }
 400
 401                 strncpy2(buf,
 402                          msginfo->from ? msginfo->from :
 403                          cur_account && cur_account->address ?
 404                          cur_account->address : "unknown",
 405                          sizeof(buf));
 406                 extract_address(buf);
 407
 408                 fprintf(mbox_fp, "From %s %s",
 409                         buf, ctime(&msginfo->date_t));
 410
 411                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 412                         if (!strncmp(buf, "From ", 5))
 413                                 fputc('>', mbox_fp);
 414                         fputs(buf, mbox_fp);
 415                 }
 416                 fputc('\n', mbox_fp);
 417
 418                 fclose(msg_fp);
 419                 procmsg_msginfo_free(msginfo);
 420         }
 421
 422         g_slist_free(mlist);
 423
 424         fclose(mbox_fp);
 425
 426         return 0;
 427 }