claws-mail/src/mbox.c
2016-11-24 21:03:34 +01:00

701 lines
15 KiB
C

/*
* Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
* Copyright (C) 1999-2015 Hiroyuki Yamamoto and the Claws Mail team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#include "claws-features.h"
#endif
#define _GNU_SOURCE
#include <stdio.h>
#ifdef USE_PTHREAD
#include <pthread.h>
#endif
#include "defs.h"
#include <glib.h>
#include <glib/gi18n.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/file.h>
#include <ctype.h>
#include <time.h>
#include <errno.h>
#ifdef G_OS_WIN32
# include <w32lib.h>
#endif
#include "mbox.h"
#include "procmsg.h"
#include "folder.h"
#include "prefs_common.h"
#include "prefs_account.h"
#include "account.h"
#include "utils.h"
#include "filtering.h"
#include "alertpanel.h"
#include "statusbar.h"
#define MESSAGEBUFSIZE 8192
#ifdef HAVE_FGETS_UNLOCKED
#define SC_FGETS fgets_unlocked
#define SC_FPUTS fputs_unlocked
#define SC_FPUTC fputc_unlocked
#else
#define SC_FGETS fgets
#define SC_FPUTS fputs
#define SC_FPUTC fputc
#endif
#define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
{ \
lines++; \
if (fputs(s, tmp_fp) == EOF) { \
g_warning("can't write to temporary file"); \
fclose(tmp_fp); \
fclose(mbox_fp); \
claws_unlink(tmp_file); \
g_free(tmp_file); \
return -1; \
} \
}
gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
PrefsAccount *account)
/* return values: -1 error, >=0 number of msgs added */
{
FILE *mbox_fp;
gchar buf[MESSAGEBUFSIZE];
gchar *tmp_file;
gint msgs = 0;
gint lines;
MsgInfo *msginfo;
gboolean more;
GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
gboolean printed = FALSE;
FolderItem *dropfolder;
cm_return_val_if_fail(dest != NULL, -1);
cm_return_val_if_fail(mbox != NULL, -1);
debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
FILE_OP_ERROR(mbox, "fopen");
alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
return -1;
}
/* ignore empty lines on the head */
do {
if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
g_warning("can't read mbox file.");
fclose(mbox_fp);
return -1;
}
} while (buf[0] == '\n' || buf[0] == '\r');
if (strncmp(buf, "From ", 5) != 0) {
g_warning("invalid mbox format: %s", mbox);
fclose(mbox_fp);
return -1;
}
tmp_file = get_tmp_file();
folder_item_update_freeze();
if (apply_filter)
dropfolder = folder_get_default_processing(account->account_id);
else
dropfolder = dest;
do {
FILE *tmp_fp;
gint empty_lines;
gint msgnum;
if (msgs > 0 && msgs%500 == 0) {
if (printed)
statusbar_pop_all();
statusbar_print_all(
ngettext("Importing from mbox... (%d mail imported)",
"Importing from mbox... (%d mails imported)", msgs), msgs);
printed=TRUE;
GTK_EVENTS_FLUSH();
}
if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
FILE_OP_ERROR(tmp_file, "fopen");
g_warning("can't open temporary file");
fclose(mbox_fp);
g_free(tmp_file);
return -1;
}
if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
FILE_OP_ERROR(tmp_file, "chmod");
}
empty_lines = 0;
lines = 0;
/* process all lines from mboxrc file */
while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
int offset;
/* eat empty lines */
if (buf[0] == '\n' || buf[0] == '\r') {
empty_lines++;
continue;
}
/* From separator or quoted From */
offset = 0;
/* detect leading '>' char(s) */
while ((buf[offset] == '>')) {
offset++;
}
if (!strncmp(buf+offset, "From ", 5)) {
/* From separator: */
if (offset == 0) {
/* expect next mbox item */
break;
}
/* quoted From: */
/* flush any eaten empty line */
if (empty_lines > 0) {
while (empty_lines-- > 0) {
FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
}
empty_lines = 0;
}
/* store the unquoted line */
FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
continue;
}
/* other line */
/* flush any eaten empty line */
if (empty_lines > 0) {
while (empty_lines-- > 0) {
FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
}
empty_lines = 0;
}
/* store the line itself */
FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
}
/* end of mbox item or end of mbox */
/* flush any eaten empty line (but the last one) */
if (empty_lines > 0) {
while (--empty_lines > 0) {
FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
}
}
/* more emails to expect? */
more = !feof(mbox_fp);
/* warn if email part is empty (it's the minimum check
we can do */
if (lines == 0) {
g_warning("malformed mbox: %s: message %d is empty", mbox, msgs);
fclose(tmp_fp);
fclose(mbox_fp);
claws_unlink(tmp_file);
return -1;
}
if (fclose(tmp_fp) == EOF) {
FILE_OP_ERROR(tmp_file, "fclose");
g_warning("can't write to temporary file");
fclose(mbox_fp);
claws_unlink(tmp_file);
g_free(tmp_file);
return -1;
}
if (apply_filter) {
if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
fclose(mbox_fp);
claws_unlink(tmp_file);
g_free(tmp_file);
return -1;
}
msginfo = folder_item_get_msginfo(dropfolder, msgnum);
to_filter = g_slist_prepend(to_filter, msginfo);
} else {
MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
finfo->file = tmp_file;
to_add = g_slist_prepend(to_add, finfo);
tmp_file = get_tmp_file();
/* flush every 500 */
if (msgs > 0 && msgs % 500 == 0) {
folder_item_add_msgs(dropfolder, to_add, TRUE);
procmsg_message_file_list_free(to_add);
to_add = NULL;
}
}
msgs++;
} while (more);
if (printed)
statusbar_pop_all();
if (apply_filter) {
folder_item_set_batch(dropfolder, FALSE);
procmsg_msglist_filter(to_filter, account,
&filtered, &unfiltered, TRUE);
folder_item_set_batch(dropfolder, TRUE);
filtering_move_and_copy_msgs(to_filter);
for (cur = filtered; cur; cur = g_slist_next(cur)) {
MsgInfo *info = (MsgInfo *)cur->data;
procmsg_msginfo_free(&info);
}
unfiltered = g_slist_reverse(unfiltered);
if (unfiltered) {
folder_item_move_msgs(dest, unfiltered);
for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
MsgInfo *info = (MsgInfo *)cur->data;
procmsg_msginfo_free(&info);
}
}
g_slist_free(unfiltered);
g_slist_free(filtered);
g_slist_free(to_filter);
} else if (to_add) {
folder_item_add_msgs(dropfolder, to_add, TRUE);
procmsg_message_file_list_free(to_add);
to_add = NULL;
}
folder_item_update_thaw();
g_free(tmp_file);
fclose(mbox_fp);
debug_print("%d messages found.\n", msgs);
return msgs;
}
gint lock_mbox(const gchar *base, LockType type)
{
#ifdef G_OS_UNIX
gint retval = 0;
if (type == LOCK_FILE) {
gchar *lockfile, *locklink;
gint retry = 0;
FILE *lockfp;
lockfile = g_strdup_printf("%s.%d", base, getpid());
if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
FILE_OP_ERROR(lockfile, "fopen");
g_warning("can't create lock file '%s', use 'flock' instead of 'file' if possible.", lockfile);
g_free(lockfile);
return -1;
}
if (fprintf(lockfp, "%d\n", getpid()) < 0) {
FILE_OP_ERROR(lockfile, "fprintf");
g_free(lockfile);
fclose(lockfp);
return -1;
}
if (fclose(lockfp) == EOF) {
FILE_OP_ERROR(lockfile, "fclose");
g_free(lockfile);
return -1;
}
locklink = g_strconcat(base, ".lock", NULL);
while (link(lockfile, locklink) < 0) {
FILE_OP_ERROR(lockfile, "link");
if (retry >= 5) {
g_warning("can't create '%s'", lockfile);
claws_unlink(lockfile);
g_free(lockfile);
return -1;
}
if (retry == 0)
g_warning("mailbox is owned by another"
" process, waiting...");
retry++;
sleep(5);
}
claws_unlink(lockfile);
g_free(lockfile);
} else if (type == LOCK_FLOCK) {
gint lockfd;
gboolean fcntled = FALSE;
#if HAVE_FCNTL_H && !defined(G_OS_WIN32)
struct flock fl;
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
#endif
#if HAVE_FLOCK
if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
#else
if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
#endif
FILE_OP_ERROR(base, "open");
return -1;
}
#if HAVE_FCNTL_H && !defined(G_OS_WIN32)
if (fcntl(lockfd, F_SETLK, &fl) == -1) {
g_warning("can't fnctl %s (%s)", base, g_strerror(errno));
close(lockfd);
return -1;
} else {
fcntled = TRUE;
}
#endif
#if HAVE_FLOCK
if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
perror("flock");
#else
#if HAVE_LOCKF
if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
perror("lockf");
#else
{
#endif
#endif /* HAVE_FLOCK */
g_warning("can't lock %s", base);
if (close(lockfd) < 0)
perror("close");
return -1;
}
retval = lockfd;
} else {
g_warning("invalid lock type");
return -1;
}
return retval;
#else
return -1;
#endif /* G_OS_UNIX */
}
gint unlock_mbox(const gchar *base, gint fd, LockType type)
{
if (type == LOCK_FILE) {
gchar *lockfile;
lockfile = g_strconcat(base, ".lock", NULL);
if (claws_unlink(lockfile) < 0) {
FILE_OP_ERROR(lockfile, "unlink");
g_free(lockfile);
return -1;
}
g_free(lockfile);
return 0;
} else if (type == LOCK_FLOCK) {
#if HAVE_FCNTL_H && !defined(G_OS_WIN32)
gboolean fcntled = FALSE;
struct flock fl;
fl.l_type = F_UNLCK;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
if (fcntl(fd, F_SETLK, &fl) == -1) {
g_warning("can't fnctl %s", base);
} else {
fcntled = TRUE;
}
#endif
#if HAVE_FLOCK
if (flock(fd, LOCK_UN) < 0 && !fcntled) {
perror("flock");
#else
#if HAVE_LOCKF
if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
perror("lockf");
#else
{
#endif
#endif /* HAVE_FLOCK */
g_warning("can't unlock %s", base);
if (close(fd) < 0)
perror("close");
return -1;
}
if (close(fd) < 0) {
perror("close");
return -1;
}
return 0;
}
g_warning("invalid lock type");
return -1;
}
gint copy_mbox(gint srcfd, const gchar *dest)
{
FILE *dest_fp;
ssize_t n_read;
gchar buf[BUFSIZ];
gboolean err = FALSE;
int save_errno = 0;
if (srcfd < 0) {
return -1;
}
if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
FILE_OP_ERROR(dest, "fopen");
return -1;
}
if (change_file_mode_rw(dest_fp, dest) < 0) {
FILE_OP_ERROR(dest, "chmod");
g_warning("can't change file mode");
}
while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
g_warning("writing to %s failed.", dest);
fclose(dest_fp);
claws_unlink(dest);
return -1;
}
}
if (save_errno != 0) {
g_warning("error %d reading mbox: %s", save_errno,
g_strerror(save_errno));
err = TRUE;
}
if (fclose(dest_fp) == EOF) {
FILE_OP_ERROR(dest, "fclose");
err = TRUE;
}
if (err) {
claws_unlink(dest);
return -1;
}
return 0;
}
void empty_mbox(const gchar *mbox)
{
FILE *fp;
if ((fp = g_fopen(mbox, "wb")) == NULL) {
FILE_OP_ERROR(mbox, "fopen");
g_warning("can't truncate mailbox to zero.");
return;
}
fclose(fp);
}
gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
/* return values: -2 skipped, -1 error, 0 OK */
{
GSList *cur;
MsgInfo *msginfo;
FILE *msg_fp;
FILE *mbox_fp;
gchar buf[BUFFSIZE];
int err = 0;
gint msgs = 1, total = g_slist_length(mlist);
if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
if (alertpanel_full(_("Overwrite mbox file"),
_("This file already exists. Do you want to overwrite it?"),
GTK_STOCK_CANCEL, _("Overwrite"), NULL, FALSE,
NULL, ALERT_WARNING, G_ALERTDEFAULT)
!= G_ALERTALTERNATE) {
return -2;
}
}
if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
FILE_OP_ERROR(mbox, "fopen");
alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
return -1;
}
#ifdef HAVE_FGETS_UNLOCKED
flockfile(mbox_fp);
#endif
statuswindow_print_all(_("Exporting to mbox..."));
for (cur = mlist; cur != NULL; cur = cur->next) {
int len;
gchar buft[BUFFSIZE];
msginfo = (MsgInfo *)cur->data;
msg_fp = procmsg_open_message(msginfo);
if (!msg_fp) {
continue;
}
#ifdef HAVE_FGETS_UNLOCKED
flockfile(msg_fp);
#endif
strncpy2(buf,
msginfo->from ? msginfo->from :
cur_account && cur_account->address ?
cur_account->address : "unknown",
sizeof(buf));
extract_address(buf);
if (fprintf(mbox_fp, "From %s %s",
buf, ctime_r(&msginfo->date_t, buft)) < 0) {
err = -1;
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
goto out;
}
buf[0] = '\0';
/* write email to mboxrc */
while (SC_FGETS(buf, sizeof(buf), msg_fp) != NULL) {
/* quote any From, >From, >>From, etc., according to mbox format specs */
int offset;
offset = 0;
/* detect leading '>' char(s) */
while ((buf[offset] == '>')) {
offset++;
}
if (!strncmp(buf+offset, "From ", 5)) {
if (SC_FPUTC('>', mbox_fp) == EOF) {
err = -1;
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
goto out;
}
}
if (SC_FPUTS(buf, mbox_fp) == EOF) {
err = -1;
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
goto out;
}
}
/* force last line to end w/ a newline */
len = strlen(buf);
if (len > 0) {
len--;
if ((buf[len] != '\n') && (buf[len] != '\r')) {
if (SC_FPUTC('\n', mbox_fp) == EOF) {
err = -1;
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
goto out;
}
}
}
/* add a trailing empty line */
if (SC_FPUTC('\n', mbox_fp) == EOF) {
err = -1;
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
goto out;
}
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(msg_fp);
#endif
fclose(msg_fp);
statusbar_progress_all(msgs++,total, 500);
if (msgs%500 == 0)
GTK_EVENTS_FLUSH();
}
out:
statusbar_progress_all(0,0,0);
statuswindow_pop_all();
#ifdef HAVE_FGETS_UNLOCKED
funlockfile(mbox_fp);
#endif
fclose(mbox_fp);
return err;
}
/* read all messages in SRC, and store them into one MBOX file. */
/* return values: -2 skipped, -1 error, 0 OK */
gint export_to_mbox(FolderItem *src, const gchar *mbox)
{
GSList *mlist;
gint ret;
cm_return_val_if_fail(src != NULL, -1);
cm_return_val_if_fail(src->folder != NULL, -1);
cm_return_val_if_fail(mbox != NULL, -1);
debug_print("Exporting messages from %s into %s...\n",
src->path, mbox);
mlist = folder_item_get_msg_list(src);
folder_item_update_freeze();
ret = export_list_to_mbox(mlist, mbox);
folder_item_update_thaw();
procmsg_msg_list_free(mlist);
return ret;
}