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