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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32 #include <sys/file.h>
  33 #include <ctype.h>
  34 #include <time.h>
  35
  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 #include "alertpanel.h"
  45
  46 #define MSGBUFSIZE      8192
  47
  48 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  49 { \
  50         lines++; \
  51         if (fputs(s, tmp_fp) == EOF) { \
  52                 g_warning("can't write to temporary file\n"); \
  53                 fclose(tmp_fp); \
  54                 fclose(mbox_fp); \
  55                 g_unlink(tmp_file); \
  56                 g_free(tmp_file); \
  57                 return -1; \
  58         } \
  59 }
  60
  61 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter)
  62 {
  63         FILE *mbox_fp;
  64         gchar buf[MSGBUFSIZE];
  65         gchar *tmp_file;
  66         gint msgs = 0;
  67         gint lines;
  68         MsgInfo *msginfo;
  69         gboolean more;
  70
  71         g_return_val_if_fail(dest != NULL, -1);
  72         g_return_val_if_fail(mbox != NULL, -1);
  73
  74         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  75
  76         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
  77                 FILE_OP_ERROR(mbox, "fopen");
  78                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
  79                 return -1;
  80         }
  81
  82         /* ignore empty lines on the head */
  83         do {
  84                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  85                         g_warning("can't read mbox file.\n");
  86                         fclose(mbox_fp);
  87                         return -1;
  88                 }
  89         } while (buf[0] == '\n' || buf[0] == '\r');
  90
  91         if (strncmp(buf, "From ", 5) != 0) {
  92                 g_warning("invalid mbox format: %s\n", mbox);
  93                 fclose(mbox_fp);
  94                 return -1;
  95         }
  96
  97         tmp_file = get_tmp_file();
  98
  99         folder_item_update_freeze();
 100
 101         do {
 102                 FILE *tmp_fp;
 103                 FolderItem *dropfolder;
 104                 gint empty_lines;
 105                 gint msgnum;
 106
 107                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 108                         FILE_OP_ERROR(tmp_file, "fopen");
 109                         g_warning("can't open temporary file\n");
 110                         fclose(mbox_fp);
 111                         g_free(tmp_file);
 112                         return -1;
 113                 }
 114                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 115                         FILE_OP_ERROR(tmp_file, "chmod");
 116                 }
 117
 118                 empty_lines = 0;
 119                 lines = 0;
 120                 more = FALSE;
 121
 122                 /* process all lines from mboxrc file */
 123                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 124                         int offset;
 125
 126                         /* eof not reached, expect more lines */
 127                         more = TRUE;
 128
 129                         /* eat empty lines */
 130                         if (buf[0] == '\n' || buf[0] == '\r') {
 131                                 empty_lines++;
 132                                 continue;
 133                         }
 134
 135                         /* From separator or quoted From */
 136                         offset = 0;
 137                         /* detect leading '>' char(s) */
 138                         while ((buf[offset] == '>')) {
 139                                 offset++;
 140                         }
 141                         if (!strncmp(buf+offset, "From ", 5)) {
 142                                 /* From separator: */
 143                                 if (offset == 0) {
 144                                         /* expect next mbox item */
 145                                         break;
 146                                 }
 147
 148                                 /* quoted From: */
 149                                 /* flush any eaten empty line */
 150                                 if (empty_lines > 0) {
 151                                         while (empty_lines-- > 0) {
 152                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 153                                 }
 154                                         empty_lines = 0;
 155                                 }
 156                                 /* store the unquoted line */
 157                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 158                                 continue;
 159                         }
 160
 161                         /* other line */
 162                         /* flush any eaten empty line */
 163                         if (empty_lines > 0) {
 164                                 while (empty_lines-- > 0) {
 165                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 166                         }
 167                                 empty_lines = 0;
 168                         }
 169                         /* store the line itself */
 170                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 171                 }
 172                 /* end of mbox item or end of mbox */
 173
 174                 /* flush any eaten empty line (but the last one) */
 175                 if (empty_lines > 0) {
 176                         while (--empty_lines > 0) {
 177                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 178                         }
 179                 }
 180
 181                 /* more emails to expect? */
 182                 more = !feof(mbox_fp);
 183
 184                 /* warn if email part is empty (it's the minimum check
 185                    we can do */
 186                 if (lines == 0) {
 187                         g_warning("malformed mbox: %s: message %d is empty\n", mbox, msgs);
 188                         fclose(tmp_fp);
 189                         fclose(mbox_fp);
 190                         g_unlink(tmp_file);
 191                         return -1;
 192                 }
 193
 194                 if (fclose(tmp_fp) == EOF) {
 195                         FILE_OP_ERROR(tmp_file, "fclose");
 196                         g_warning("can't write to temporary file\n");
 197                         fclose(mbox_fp);
 198                         g_unlink(tmp_file);
 199                         g_free(tmp_file);
 200                         return -1;
 201                 }
 202
 203                 dropfolder = folder_get_default_processing();
 204
 205                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 206                         fclose(mbox_fp);
 207                         g_unlink(tmp_file);
 208                         g_free(tmp_file);
 209                         return -1;
 210                 }
 211
 212                 msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 213                 if (!apply_filter || !procmsg_msginfo_filter(msginfo))
 214                         folder_item_move_msg(dest, msginfo);
 215                 procmsg_msginfo_free(msginfo);
 216
 217                 msgs++;
 218         } while (more);
 219
 220         folder_item_update_thaw();
 221
 222         g_free(tmp_file);
 223         fclose(mbox_fp);
 224         debug_print("%d messages found.\n", msgs);
 225
 226         return msgs;
 227 }
 228
 229 gint lock_mbox(const gchar *base, LockType type)
 230 {
 231 #ifdef G_OS_UNIX
 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 = g_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                                 g_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                 g_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 #else
 303         return -1;
 304 #endif /* G_OS_UNIX */
 305 }
 306
 307 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 308 {
 309         if (type == LOCK_FILE) {
 310                 gchar *lockfile;
 311
 312                 lockfile = g_strconcat(base, ".lock", NULL);
 313                 if (g_unlink(lockfile) < 0) {
 314                         FILE_OP_ERROR(lockfile, "unlink");
 315                         g_free(lockfile);
 316                         return -1;
 317                 }
 318                 g_free(lockfile);
 319
 320                 return 0;
 321         } else if (type == LOCK_FLOCK) {
 322 #if HAVE_FLOCK
 323                 if (flock(fd, LOCK_UN) < 0) {
 324                         perror("flock");
 325 #else
 326 #if HAVE_LOCKF
 327                 if (lockf(fd, F_ULOCK, 0) < 0) {
 328                         perror("lockf");
 329 #else
 330                 {
 331 #endif
 332 #endif /* HAVE_FLOCK */
 333                         g_warning("can't unlock %s\n", base);
 334                         if (close(fd) < 0)
 335                                 perror("close");
 336                         return -1;
 337                 }
 338
 339                 if (close(fd) < 0) {
 340                         perror("close");
 341                         return -1;
 342                 }
 343
 344                 return 0;
 345         }
 346
 347         g_warning("invalid lock type\n");
 348         return -1;
 349 }
 350
 351 gint copy_mbox(const gchar *src, const gchar *dest)
 352 {
 353         return copy_file(src, dest, TRUE);
 354 }
 355
 356 void empty_mbox(const gchar *mbox)
 357 {
 358         FILE *fp;
 359
 360         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 361                 FILE_OP_ERROR(mbox, "fopen");
 362                 g_warning("can't truncate mailbox to zero.\n");
 363                 return;
 364         }
 365         fclose(fp);
 366 }
 367
 368 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 369 {
 370         GSList *cur;
 371         MsgInfo *msginfo;
 372         FILE *msg_fp;
 373         FILE *mbox_fp;
 374         gchar buf[BUFFSIZE];
 375
 376         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 377                 if (alertpanel_full(_("Overwrite mbox file"),
 378                                                         _("This file already exists. Do you want to overwrite it?"),
 379                                                         _("Overwrite"), GTK_STOCK_CANCEL, NULL, FALSE,
 380                                                         NULL, ALERT_WARNING, G_ALERTALTERNATE)
 381                         == G_ALERTALTERNATE) {
 382                 return -1;
 383         }
 384         }
 385
 386         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 387                 FILE_OP_ERROR(mbox, "fopen");
 388                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 389                 return -1;
 390         }
 391
 392         for (cur = mlist; cur != NULL; cur = cur->next) {
 393                 msginfo = (MsgInfo *)cur->data;
 394                 int len;
 395
 396                 msg_fp = procmsg_open_message(msginfo);
 397                 if (!msg_fp) {
 398                         procmsg_msginfo_free(msginfo);
 399                         continue;
 400                 }
 401
 402                 strncpy2(buf,
 403                          msginfo->from ? msginfo->from :
 404                          cur_account && cur_account->address ?
 405                          cur_account->address : "unknown",
 406                          sizeof(buf));
 407                 extract_address(buf);
 408
 409                 fprintf(mbox_fp, "From %s %s",
 410                         buf, ctime(&msginfo->date_t));
 411
 412                 buf[0] = '\0';
 413
 414                 /* write email to mboxrc */
 415                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 416                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 417                         int offset;
 418
 419                         offset = 0;
 420                         /* detect leading '>' char(s) */
 421                         while ((buf[offset] == '>')) {
 422                                 offset++;
 423                         }
 424                         if (!strncmp(buf+offset, "From ", 5))
 425                                 fputc('>', mbox_fp);
 426                         fputs(buf, mbox_fp);
 427                 }
 428
 429                 /* force last line to end w/ a newline */
 430                 len = strlen(buf);
 431                 if (len > 0) {
 432                         len--;
 433                         if ((buf[len] != '\n') && (buf[len] != '\r'))
 434                                 fputc('\n', mbox_fp);
 435                 }
 436
 437                 /* add a trailing empty line */
 438                 fputc('\n', mbox_fp);
 439
 440                 fclose(msg_fp);
 441                 procmsg_msginfo_free(msginfo);
 442         }
 443
 444         fclose(mbox_fp);
 445
 446         return 0;
 447 }
 448
 449 /* read all messages in SRC, and store them into one MBOX file. */
 450 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 451 {
 452         GSList *mlist;
 453
 454         g_return_val_if_fail(src != NULL, -1);
 455         g_return_val_if_fail(src->folder != NULL, -1);
 456         g_return_val_if_fail(mbox != NULL, -1);
 457
 458         debug_print("Exporting messages from %s into %s...\n",
 459                     src->path, mbox);
 460
 461         mlist = folder_item_get_msg_list(src);
 462
 463         export_list_to_mbox(mlist, mbox);
 464
 465         procmsg_msg_list_free(mlist);
 466
 467         return 0;
 468 }