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/* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "ioloop.h"
#include "index-storage.h"
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#define NOTIFY_DELAY_MSECS 500
struct index_notify_file {
struct index_notify_file *next;
char *path;
time_t last_stamp;
};
struct index_notify_io {
struct index_notify_io *next;
struct io *io;
};
static void check_timeout(struct index_mailbox *ibox)
{
struct index_notify_file *file;
struct stat st;
bool notify = FALSE;
for (file = ibox->notify_files; file != NULL; file = file->next) {
if (stat(file->path, &st) == 0 &&
file->last_stamp != st.st_mtime) {
file->last_stamp = st.st_mtime;
notify = TRUE;
}
}
if (notify) {
if (ibox->notify_delay_to != NULL)
timeout_remove(&ibox->notify_delay_to);
ibox->box.notify_callback(&ibox->box, ibox->box.notify_context);
}
}
static void notify_delay_callback(struct index_mailbox *ibox)
{
ibox->box.notify_callback(&ibox->box, ibox->box.notify_context);
}
static void notify_callback(struct index_mailbox *ibox)
{
timeout_reset(ibox->notify_to);
if (ibox->notify_delay_to == NULL) {
ibox->notify_delay_to =
timeout_add(NOTIFY_DELAY_MSECS,
notify_delay_callback, ibox);
}
}
void index_mailbox_check_add(struct index_mailbox *ibox,
const char *path)
{
struct index_notify_file *file;
struct stat st;
struct io *io = NULL;
struct index_notify_io *aio;
(void)io_add_notify(path, notify_callback, ibox, &io);
if (io != NULL) {
aio = i_new(struct index_notify_io, 1);
aio->io = io;
aio->next = ibox->notify_ios;
ibox->notify_ios = aio;
}
file = i_new(struct index_notify_file, 1);
file->path = i_strdup(path);
file->last_stamp = stat(path, &st) < 0 ? 0 : st.st_mtime;
file->next = ibox->notify_files;
ibox->notify_files = file;
/* we still add a timeout if we don't have one already,
* because we don't know what happens with [di]notify
* when the filesystem is remote (NFS, ...) */
if (ibox->notify_to == NULL) {
ibox->notify_to =
timeout_add(ibox->box.notify_min_interval * 1000,
check_timeout, ibox);
}
}
void index_mailbox_check_remove_all(struct index_mailbox *ibox)
{
struct index_notify_file *file;
struct index_notify_io *aio;
while (ibox->notify_files != NULL) {
file = ibox->notify_files;
ibox->notify_files = file->next;
i_free(file->path);
i_free(file);
}
while (ibox->notify_ios != NULL) {
aio = ibox->notify_ios;
ibox->notify_ios = aio->next;
io_remove(&aio->io);
i_free(aio);
}
if (ibox->notify_delay_to != NULL)
timeout_remove(&ibox->notify_delay_to);
if (ibox->notify_to != NULL)
timeout_remove(&ibox->notify_to);
}
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