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         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 = 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 = 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
 134                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 135                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 136                 from_line[0] = '\0';
 137
 138                 empty_line = 0;
 139
 140                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 141                         if (buf[0] == '\n' || buf[0] == '\r') {
 142                                 empty_line++;
 143                                 buf[0] = '\0';
 144                                 continue;
 145                         }
 146
 147                         /* From separator */
 148                         while (!strncmp(buf, "From ", 5)) {
 149                                 strcpy(from_line, buf);
 150                                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 151                                         buf[0] = '\0';
 152                                         break;
 153                                 }
 154
 155                                 if (is_header_line(buf)) {
 156                                         is_next_msg = TRUE;
 157                                         break;
 158                                 } else if (!strncmp(buf, "From ", 5)) {
 159                                         continue;
 160                                 } else if (!strncmp(buf, ">From ", 6)) {
 161                                         g_memmove(buf, buf + 1, strlen(buf));
 162                                         is_next_msg = TRUE;
 163                                         break;
 164                                 } else {
 165                                         g_warning("unescaped From found:\n%s",
 166                                                   from_line);
 167                                         break;
 168                                 }
 169                         }
 170                         if (is_next_msg) break;
 171
 172                         if (empty_line > 0) {
 173                                 while (empty_line--)
 174                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 175                                 empty_line = 0;
 176                         }
 177
 178                         if (from_line[0] != '\0') {
 179                                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 180                                 from_line[0] = '\0';
 181                         }
 182
 183                         if (buf[0] != '\0') {
 184                                 if (!strncmp(buf, ">From ", 6)) {
 185                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 186                                 } else
 187                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 188
 189                                 buf[0] = '\0';
 190                         }
 191                 }
 192
 193                 if (empty_line > 0) {
 194                         while (--empty_line)
 195                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 196                 }
 197
 198                 if (fclose(tmp_fp) == EOF) {
 199                         FILE_OP_ERROR(tmp_file, "fclose");
 200                         g_warning("can't write to temporary file\n");
 201                         fclose(mbox_fp);
 202                         unlink(tmp_file);
 203                         g_free(tmp_file);
 204                         return -1;
 205                 }
 206
 207                 dropfolder = folder_get_default_processing();
 208
 209                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 210                         fclose(mbox_fp);
 211                         unlink(tmp_file);
 212                         g_free(tmp_file);
 213                         return -1;
 214                 }
 215
 216                 msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 217                 if (!procmsg_msginfo_filter(msginfo))
 218                         folder_item_move_msg(dest, msginfo);
 219                 procmsg_msginfo_free(msginfo);
 220
 221                 msgs++;
 222         } while (from_line[0] != '\0');
 223
 224         folder_item_update_thaw();
 225
 226         g_free(tmp_file);
 227         fclose(mbox_fp);
 228         debug_print("%d messages found.\n", msgs);
 229
 230         return msgs;
 231 }
 232
 233 gint lock_mbox(const gchar *base, LockType type)
 234 {
 235         gint retval = 0;
 236
 237         if (type == LOCK_FILE) {
 238                 gchar *lockfile, *locklink;
 239                 gint retry = 0;
 240                 FILE *lockfp;
 241
 242                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 243                 if ((lockfp = fopen(lockfile, "wb")) == NULL) {
 244                         FILE_OP_ERROR(lockfile, "fopen");
 245                         g_warning("can't create lock file %s\n", lockfile);
 246                         g_warning("use 'flock' instead of 'file' if possible.\n");
 247                         g_free(lockfile);
 248                         return -1;
 249                 }
 250
 251                 fprintf(lockfp, "%d\n", getpid());
 252                 fclose(lockfp);
 253
 254                 locklink = g_strconcat(base, ".lock", NULL);
 255                 while (link(lockfile, locklink) < 0) {
 256                         FILE_OP_ERROR(lockfile, "link");
 257                         if (retry >= 5) {
 258                                 g_warning("can't create %s\n", lockfile);
 259                                 unlink(lockfile);
 260                                 g_free(lockfile);
 261                                 return -1;
 262                         }
 263                         if (retry == 0)
 264                                 g_warning("mailbox is owned by another"
 265                                             " process, waiting...\n");
 266                         retry++;
 267                         sleep(5);
 268                 }
 269                 unlink(lockfile);
 270                 g_free(lockfile);
 271         } else if (type == LOCK_FLOCK) {
 272                 gint lockfd;
 273
 274 #if HAVE_FLOCK
 275                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 276 #else
 277                 if ((lockfd = open(base, O_RDWR)) < 0) {
 278 #endif
 279                         FILE_OP_ERROR(base, "open");
 280                         return -1;
 281                 }
 282 #if HAVE_FLOCK
 283                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 284                         perror("flock");
 285 #else
 286 #if HAVE_LOCKF
 287                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 288                         perror("lockf");
 289 #else
 290                 {
 291 #endif
 292 #endif /* HAVE_FLOCK */
 293                         g_warning("can't lock %s\n", base);
 294                         if (close(lockfd) < 0)
 295                                 perror("close");
 296                         return -1;
 297                 }
 298                 retval = lockfd;
 299         } else {
 300                 g_warning("invalid lock type\n");
 301                 return -1;
 302         }
 303
 304         return retval;
 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 (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         if (truncate(mbox, 0) < 0) {
 359                 FILE *fp;
 360
 361                 FILE_OP_ERROR(mbox, "truncate");
 362                 if ((fp = fopen(mbox, "wb")) == NULL) {
 363                         FILE_OP_ERROR(mbox, "fopen");
 364                         g_warning("can't truncate mailbox to zero.\n");
 365                         return;
 366                 }
 367                 fclose(fp);
 368         }
 369 }
 370
 371 /* read all messages in SRC, and store them into one MBOX file. */
 372 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 373 {
 374         GSList *mlist;
 375         GSList *cur;
 376         MsgInfo *msginfo;
 377         FILE *msg_fp;
 378         FILE *mbox_fp;
 379         gchar buf[BUFFSIZE];
 380
 381         g_return_val_if_fail(src != NULL, -1);
 382         g_return_val_if_fail(src->folder != NULL, -1);
 383         g_return_val_if_fail(mbox != NULL, -1);
 384
 385         debug_print("Exporting messages from %s into %s...\n",
 386                     src->path, mbox);
 387
 388         if ((mbox_fp = fopen(mbox, "wb")) == NULL) {
 389                 FILE_OP_ERROR(mbox, "fopen");
 390                 return -1;
 391         }
 392
 393         mlist = folder_item_get_msg_list(src);
 394
 395         for (cur = mlist; cur != NULL; cur = cur->next) {
 396                 msginfo = (MsgInfo *)cur->data;
 397
 398                 msg_fp = procmsg_open_message(msginfo);
 399                 if (!msg_fp) {
 400                         procmsg_msginfo_free(msginfo);
 401                         continue;
 402                 }
 403
 404                 strncpy2(buf,
 405                          msginfo->from ? msginfo->from :
 406                          cur_account && cur_account->address ?
 407                          cur_account->address : "unknown",
 408                          sizeof(buf));
 409                 extract_address(buf);
 410
 411                 fprintf(mbox_fp, "From %s %s",
 412                         buf, ctime(&msginfo->date_t));
 413
 414                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 415                         if (!strncmp(buf, "From ", 5))
 416                                 fputc('>', mbox_fp);
 417                         fputs(buf, mbox_fp);
 418                 }
 419                 fputc('\n', mbox_fp);
 420
 421                 fclose(msg_fp);
 422                 procmsg_msginfo_free(msginfo);
 423         }
 424
 425         g_slist_free(mlist);
 426
 427         fclose(mbox_fp);
 428
 429         return 0;
 430 }