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 <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
  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                 g_unlink(tmp_file); \
  54                 g_free(tmp_file); \
  55                 return -1; \
  56         } \
  57 }
  58
  59 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter)
  60 {
  61         FILE *mbox_fp;
  62         gchar buf[MSGBUFSIZE], from_line[MSGBUFSIZE];
  63         gchar *tmp_file;
  64         gint msgs = 0;
  65         MsgInfo *msginfo;
  66
  67         g_return_val_if_fail(dest != NULL, -1);
  68         g_return_val_if_fail(mbox != NULL, -1);
  69
  70         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  71
  72         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
  73                 FILE_OP_ERROR(mbox, "fopen");
  74                 return -1;
  75         }
  76
  77         /* ignore empty lines on the head */
  78         do {
  79                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  80                         g_warning("can't read mbox file.\n");
  81                         fclose(mbox_fp);
  82                         return -1;
  83                 }
  84         } while (buf[0] == '\n' || buf[0] == '\r');
  85
  86         if (strncmp(buf, "From ", 5) != 0) {
  87                 g_warning("invalid mbox format: %s\n", mbox);
  88                 fclose(mbox_fp);
  89                 return -1;
  90         }
  91
  92         strcpy(from_line, buf);
  93         if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  94                 g_warning("malformed mbox: %s\n", mbox);
  95                 fclose(mbox_fp);
  96                 return -1;
  97         }
  98
  99         tmp_file = get_tmp_file();
 100
 101         folder_item_update_freeze();
 102
 103         do {
 104                 FILE *tmp_fp;
 105                 FolderItem *dropfolder;
 106                 gint empty_line;
 107                 gboolean is_next_msg = FALSE;
 108                 gint msgnum;
 109
 110                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 111                         FILE_OP_ERROR(tmp_file, "fopen");
 112                         g_warning("can't open temporary file\n");
 113                         fclose(mbox_fp);
 114                         g_free(tmp_file);
 115                         return -1;
 116                 }
 117                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0)
 118                         FILE_OP_ERROR(tmp_file, "chmod");
 119
 120                 /* convert unix From into Return-Path */
 121                 /*
 122                 startp = from_line + 5;
 123                 endp = strchr(startp, ' ');
 124                 if (endp == NULL)
 125                         rpath = g_strdup(startp);
 126                 else
 127                         rpath = g_strndup(startp, endp - startp);
 128                 g_strstrip(rpath);
 129                 g_snprintf(from_line, sizeof(from_line),
 130                            "Return-Path: %s\n", rpath);
 131                 g_free(rpath);
 132
 133                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 134                 */
 135
 136                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 137                 from_line[0] = '\0';
 138
 139                 empty_line = 0;
 140
 141                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 142                         if (buf[0] == '\n' || buf[0] == '\r') {
 143                                 empty_line++;
 144                                 buf[0] = '\0';
 145                                 continue;
 146                         }
 147
 148                         /* From separator */
 149                         while (!strncmp(buf, "From ", 5)) {
 150                                 strcpy(from_line, buf);
 151                                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 152                                         buf[0] = '\0';
 153                                         break;
 154                                 }
 155
 156                                 if (is_header_line(buf)) {
 157                                         is_next_msg = TRUE;
 158                                         break;
 159                                 } else if (!strncmp(buf, "From ", 5)) {
 160                                         continue;
 161                                 } else if (!strncmp(buf, ">From ", 6)) {
 162                                         g_memmove(buf, buf + 1, strlen(buf));
 163                                         is_next_msg = TRUE;
 164                                         break;
 165                                 } else {
 166                                         g_warning("unescaped From found:\n%s",
 167                                                   from_line);
 168                                         break;
 169                                 }
 170                         }
 171                         if (is_next_msg) break;
 172
 173                         if (empty_line > 0) {
 174                                 while (empty_line--)
 175                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 176                                 empty_line = 0;
 177                         }
 178
 179                         if (from_line[0] != '\0') {
 180                                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 181                                 from_line[0] = '\0';
 182                         }
 183
 184                         if (buf[0] != '\0') {
 185                                 if (!strncmp(buf, ">From ", 6)) {
 186                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 187                                 } else
 188                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 189
 190                                 buf[0] = '\0';
 191                         }
 192                 }
 193
 194                 if (empty_line > 0) {
 195                         while (--empty_line)
 196                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 197                 }
 198
 199                 if (fclose(tmp_fp) == EOF) {
 200                         FILE_OP_ERROR(tmp_file, "fclose");
 201                         g_warning("can't write to temporary file\n");
 202                         fclose(mbox_fp);
 203                         g_unlink(tmp_file);
 204                         g_free(tmp_file);
 205                         return -1;
 206                 }
 207
 208                 dropfolder = folder_get_default_processing();
 209
 210                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 211                         fclose(mbox_fp);
 212                         g_unlink(tmp_file);
 213                         g_free(tmp_file);
 214                         return -1;
 215                 }
 216
 217                 msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 218                 if (!apply_filter || !procmsg_msginfo_filter(msginfo))
 219                         folder_item_move_msg(dest, msginfo);
 220                 procmsg_msginfo_free(msginfo);
 221
 222                 msgs++;
 223         } while (from_line[0] != '\0');
 224
 225         folder_item_update_thaw();
 226
 227         g_free(tmp_file);
 228         fclose(mbox_fp);
 229         debug_print("%d messages found.\n", msgs);
 230
 231         return msgs;
 232 }
 233
 234 gint lock_mbox(const gchar *base, LockType type)
 235 {
 236 #ifdef G_OS_UNIX
 237         gint retval = 0;
 238
 239         if (type == LOCK_FILE) {
 240                 gchar *lockfile, *locklink;
 241                 gint retry = 0;
 242                 FILE *lockfp;
 243
 244                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 245                 if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
 246                         FILE_OP_ERROR(lockfile, "fopen");
 247                         g_warning("can't create lock file %s\n", lockfile);
 248                         g_warning("use 'flock' instead of 'file' if possible.\n");
 249                         g_free(lockfile);
 250                         return -1;
 251                 }
 252
 253                 fprintf(lockfp, "%d\n", getpid());
 254                 fclose(lockfp);
 255
 256                 locklink = g_strconcat(base, ".lock", NULL);
 257                 while (link(lockfile, locklink) < 0) {
 258                         FILE_OP_ERROR(lockfile, "link");
 259                         if (retry >= 5) {
 260                                 g_warning("can't create %s\n", lockfile);
 261                                 g_unlink(lockfile);
 262                                 g_free(lockfile);
 263                                 return -1;
 264                         }
 265                         if (retry == 0)
 266                                 g_warning("mailbox is owned by another"
 267                                             " process, waiting...\n");
 268                         retry++;
 269                         sleep(5);
 270                 }
 271                 g_unlink(lockfile);
 272                 g_free(lockfile);
 273         } else if (type == LOCK_FLOCK) {
 274                 gint lockfd;
 275
 276 #if HAVE_FLOCK
 277                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 278 #else
 279                 if ((lockfd = open(base, O_RDWR)) < 0) {
 280 #endif
 281                         FILE_OP_ERROR(base, "open");
 282                         return -1;
 283                 }
 284 #if HAVE_FLOCK
 285                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 286                         perror("flock");
 287 #else
 288 #if HAVE_LOCKF
 289                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 290                         perror("lockf");
 291 #else
 292                 {
 293 #endif
 294 #endif /* HAVE_FLOCK */
 295                         g_warning("can't lock %s\n", base);
 296                         if (close(lockfd) < 0)
 297                                 perror("close");
 298                         return -1;
 299                 }
 300                 retval = lockfd;
 301         } else {
 302                 g_warning("invalid lock type\n");
 303                 return -1;
 304         }
 305
 306         return retval;
 307 #else
 308         return -1;
 309 #endif /* G_OS_UNIX */
 310 }
 311
 312 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 313 {
 314         if (type == LOCK_FILE) {
 315                 gchar *lockfile;
 316
 317                 lockfile = g_strconcat(base, ".lock", NULL);
 318                 if (g_unlink(lockfile) < 0) {
 319                         FILE_OP_ERROR(lockfile, "unlink");
 320                         g_free(lockfile);
 321                         return -1;
 322                 }
 323                 g_free(lockfile);
 324
 325                 return 0;
 326         } else if (type == LOCK_FLOCK) {
 327 #if HAVE_FLOCK
 328                 if (flock(fd, LOCK_UN) < 0) {
 329                         perror("flock");
 330 #else
 331 #if HAVE_LOCKF
 332                 if (lockf(fd, F_ULOCK, 0) < 0) {
 333                         perror("lockf");
 334 #else
 335                 {
 336 #endif
 337 #endif /* HAVE_FLOCK */
 338                         g_warning("can't unlock %s\n", base);
 339                         if (close(fd) < 0)
 340                                 perror("close");
 341                         return -1;
 342                 }
 343
 344                 if (close(fd) < 0) {
 345                         perror("close");
 346                         return -1;
 347                 }
 348
 349                 return 0;
 350         }
 351
 352         g_warning("invalid lock type\n");
 353         return -1;
 354 }
 355
 356 gint copy_mbox(const gchar *src, const gchar *dest)
 357 {
 358         return copy_file(src, dest, TRUE);
 359 }
 360
 361 void empty_mbox(const gchar *mbox)
 362 {
 363         FILE *fp;
 364
 365         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 366                 FILE_OP_ERROR(mbox, "fopen");
 367                 g_warning("can't truncate mailbox to zero.\n");
 368                 return;
 369         }
 370         fclose(fp);
 371 }
 372
 373 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 374 {
 375         GSList *cur;
 376         MsgInfo *msginfo;
 377         FILE *msg_fp;
 378         FILE *mbox_fp;
 379         gchar buf[BUFFSIZE];
 380
 381         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 382                 FILE_OP_ERROR(mbox, "fopen");
 383                 return -1;
 384         }
 385
 386         for (cur = mlist; cur != NULL; cur = cur->next) {
 387                 msginfo = (MsgInfo *)cur->data;
 388
 389                 msg_fp = procmsg_open_message(msginfo);
 390                 if (!msg_fp) {
 391                         procmsg_msginfo_free(msginfo);
 392                         continue;
 393                 }
 394
 395                 strncpy2(buf,
 396                          msginfo->from ? msginfo->from :
 397                          cur_account && cur_account->address ?
 398                          cur_account->address : "unknown",
 399                          sizeof(buf));
 400                 extract_address(buf);
 401
 402                 fprintf(mbox_fp, "From %s %s",
 403                         buf, ctime(&msginfo->date_t));
 404
 405                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 406                         if (!strncmp(buf, "From ", 5))
 407                                 fputc('>', mbox_fp);
 408                         fputs(buf, mbox_fp);
 409                 }
 410                 fputc('\n', mbox_fp);
 411
 412                 fclose(msg_fp);
 413                 procmsg_msginfo_free(msginfo);
 414         }
 415
 416         fclose(mbox_fp);
 417
 418         return 0;
 419 }
 420
 421 /* read all messages in SRC, and store them into one MBOX file. */
 422 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 423 {
 424         GSList *mlist;
 425
 426         g_return_val_if_fail(src != NULL, -1);
 427         g_return_val_if_fail(src->folder != NULL, -1);
 428         g_return_val_if_fail(mbox != NULL, -1);
 429
 430         debug_print("Exporting messages from %s into %s...\n",
 431                     src->path, mbox);
 432
 433         mlist = folder_item_get_msg_list(src);
 434
 435         export_list_to_mbox(mlist, mbox);
 436
 437         procmsg_msg_list_free(mlist);
 438
 439         return 0;
 440 }