static int do_synclogfile(const char *synclogfile)
{
strarray_t *folders = NULL;
sync_log_reader_t *slr;
int nskipped = 0;
int i;
int r;
slr = sync_log_reader_create_with_filename(synclogfile);
r = sync_log_reader_begin(slr);
if (r) goto out;
folders = read_sync_log_items(slr);
sync_log_reader_end(slr);
/* sort folders for locality of reference in file processing mode */
strarray_sort(folders, cmpstringp_raw);
signals_poll();
/* have some due items in the queue, try to index them */
rx = search_begin_update(verbose);
for (i = 0; i < folders->count; i++) {
const char *mboxname = strarray_nth(folders, i);
if (verbose > 1)
syslog(LOG_INFO, "do_synclogfile: indexing %s", mboxname);
r = index_one(mboxname, /*blocking*/1);
if (r == IMAP_MAILBOX_NONEXISTENT)
r = 0;
if (r == IMAP_MAILBOX_LOCKED || r == IMAP_AGAIN) {
nskipped++;
if (nskipped > 10000) {
syslog(LOG_ERR, "IOERROR: skipped too many times at %s", mboxname);
break;
}
r = 0;
/* try again at the end */
strarray_append(folders, mboxname);
}
if (r) {
syslog(LOG_ERR, "IOERROR: failed to index %s: %s",
mboxname, error_message(r));
break;
}
if (sleepmicroseconds)
usleep(sleepmicroseconds);
}
search_end_update(rx);
rx = NULL;
out:
strarray_free(folders);
sync_log_reader_free(slr);
return r;
}
static int do_sync_filename(const char *filename)
{
sync_log_reader_t *slr;
int r;
if ((filename == NULL) || !strcmp(filename, "-"))
slr = sync_log_reader_create_with_fd(0); /* STDIN */
else
slr = sync_log_reader_create_with_filename(filename);
r = sync_log_reader_begin(slr);
if (!r)
r = do_sync(slr);
sync_log_reader_end(slr);
sync_log_reader_free(slr);
return r;
}
static int do_daemon_work(const char *channel, const char *sync_shutdown_file,
unsigned long timeout, unsigned long min_delta,
int *restartp)
{
int r = 0;
time_t session_start;
time_t single_start;
int delta;
struct stat sbuf;
sync_log_reader_t *slr;
*restartp = RESTART_NONE;
slr = sync_log_reader_create_with_channel(channel);
session_start = time(NULL);
while (1) {
single_start = time(NULL);
signals_poll();
/* Check for shutdown file */
if (sync_shutdown_file && !stat(sync_shutdown_file, &sbuf)) {
unlink(sync_shutdown_file);
break;
}
/* See if its time to RESTART */
if ((timeout > 0) &&
((single_start - session_start) > (time_t) timeout)) {
*restartp = RESTART_NORMAL;
break;
}
r = sync_log_reader_begin(slr);
if (r) {
/* including specifically r == IMAP_AGAIN */
if (min_delta > 0) {
sleep(min_delta);
} else {
usleep(100000); /* 1/10th second */
}
continue;
}
/* Process the work log */
if ((r=do_sync(slr))) {
syslog(LOG_ERR,
"Processing sync log file %s failed: %s",
sync_log_reader_get_file_name(slr), error_message(r));
break;
}
r = sync_log_reader_end(slr);
if (r) break;
delta = time(NULL) - single_start;
if (((unsigned) delta < min_delta) && ((min_delta-delta) > 0))
sleep(min_delta-delta);
}
sync_log_reader_free(slr);
if (*restartp == RESTART_NORMAL) {
r = do_restart();
if (r) {
syslog(LOG_ERR, "sync_client RESTART failed: %s",
error_message(r));
} else {
syslog(LOG_INFO, "sync_client RESTART succeeded");
}
r = 0;
}
return(r);
}
/*
* Begin reading a sync log file. If the reader is reading from a
* channel, rename the current log file so it will not be appended to by
* the write side code, and open the file. Otherwise, just open the file
* (note this is still necessary even when the reader is reading from a
* file descriptor).
*
* When sync_log_reader_begin() returns success, you should loop calling
* sync_log_reader_getitem() and handling the items, until it returns
* EOF, and then call sync_log_reader_end().
*
* Returns zero on success, IMAP_AGAIN if reading from a channel and
* there is no current log file, or an IMAP error code on failure.
*/
EXPORTED int sync_log_reader_begin(sync_log_reader_t *slr)
{
struct stat sbuf;
int r;
if (slr->input) {
r = sync_log_reader_end(slr);
if (r) return r;
}
if (stat(slr->work_file, &sbuf) == 0) {
/* Existing work log file - process this first */
syslog(LOG_NOTICE,
"Reprocessing sync log file %s", slr->work_file);
}
else if (!slr->log_file) {
syslog(LOG_ERR, "Failed to stat %s: %m",
slr->log_file);
return IMAP_IOERROR;
}
else {
/* Check for sync_log file */
if (stat(slr->log_file, &sbuf) < 0) {
if (errno == ENOENT)
return IMAP_AGAIN; /* no problem, try again later */
syslog(LOG_ERR, "Failed to stat %s: %m",
slr->log_file);
return IMAP_IOERROR;
}
/* Move sync_log to our work file */
if (rename(slr->log_file, slr->work_file) < 0) {
syslog(LOG_ERR, "Rename %s -> %s failed: %m",
slr->log_file, slr->work_file);
return IMAP_IOERROR;
}
}
if (slr->fd < 0) {
int fd = open(slr->work_file, O_RDWR, 0);
if (fd < 0) {
syslog(LOG_ERR, "Failed to open %s: %m", slr->work_file);
return IMAP_IOERROR;
}
if (lock_blocking(fd, slr->work_file) < 0) {
syslog(LOG_ERR, "Failed to lock %s: %m", slr->work_file);
close(fd);
return IMAP_IOERROR;
}
slr->fd = fd;
slr->fd_is_ours = 1;
/* we can unlock immediately, since we have serialised
* any process which held the lock over the rename. All
* future attempts to lock this inode will stat and notice
* the rename, so they won't write any more */
lock_unlock(slr->fd, slr->work_file);
}
slr->input = prot_new(slr->fd, /*write*/0);
return 0;
}