index-mailbox-check.c revision 6246b93fb37890dcb2f4df9896438f3f376ab284
/* Copyright (C) 2002 Timo Sirainen */
#include "lib.h"
#include "ioloop.h"
#include "index-storage.h"
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
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(void *context)
{
struct index_mailbox *ibox = context;
struct index_notify_file *file;
struct stat st;
time_t last_check;
int notify;
/* check changes only when we can also notify of new mail */
last_check = I_MAX(ibox->sync_last_check, ibox->notify_last_check);
if ((unsigned int)(ioloop_time - last_check) <
ibox->min_notify_interval)
return;
ibox->notify_last_check = ioloop_time;
notify = ibox->notify_pending;
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) {
ibox->notify_last_sent = ioloop_time;
ibox->notify_pending = FALSE;
ibox->notify_callback(&ibox->box, ibox->notify_context);
}
}
static void notify_callback(void *context)
{
struct index_mailbox *ibox = context;
ibox->notify_last_check = ioloop_time;
if ((unsigned int)(ioloop_time - ibox->notify_last_sent) >=
ibox->min_notify_interval) {
ibox->notify_last_sent = ioloop_time;
ibox->notify_pending = FALSE;
ibox->notify_callback(&ibox->box, ibox->notify_context);
} else {
ibox->notify_pending = TRUE;
}
}
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;
io = io_add_notify(path, notify_callback, ibox);
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(1000, check_timeout, ibox);
}
void index_mailbox_check_remove_all(struct index_mailbox *ibox)
{
struct index_notify_file *file;
struct index_notify_io *aio;
/* reset notify stamp */
ibox->notify_last_sent = 0;
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_to != NULL) {
timeout_remove(ibox->notify_to);
ibox->notify_to = NULL;
}
}