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