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