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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/*
* liblazymount
*
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <poll.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/inotify.h>
#include <vconf.h>
#ifndef VCONFKEY_SYSTEM_LAZY_MOUNT_SHOW_UI
#define VCONFKEY_SYSTEM_LAZY_MOUNT_SHOW_UI "db/system/lazy_mount_show_ui"
#endif
#define DEFAULT_VALUE_LAZY_MOUNT_SHOW_UI 0
#define LAZY_MOUNT_FILE "/tmp/.lazy_mount"
#define LAZY_MOUNT_CHECK_DIR "/run"
#define UNLOCK_MNT_STR ".unlock_mnt"
#define LAZY_MOUNT_CHECK_FILE LAZY_MOUNT_CHECK_DIR "/" UNLOCK_MNT_STR
#define EVENT_NAME_MAX 256
#define EVENT_SIZE (sizeof(struct inotify_event))
#define EVENT_BUF_LEN (512 * (EVENT_SIZE + EVENT_NAME_MAX))
/* Enumerate list of FDs to poll */
enum {
FD_POLL_INOTIFY = 0,
FD_POLL_MAX
};
int get_need_ui_for_lazy_mount()
{
int sl_result = 0;
/* get touchkey light duration setting */
if (vconf_get_int(VCONFKEY_SYSTEM_LAZY_MOUNT_SHOW_UI, &sl_result) < 0)
return DEFAULT_VALUE_LAZY_MOUNT_SHOW_UI;
if (sl_result != 1 && sl_result != 0)
return DEFAULT_VALUE_LAZY_MOUNT_SHOW_UI;
return sl_result;
}
int do_mount_user()
{
FILE *f = NULL;
f = fopen(LAZY_MOUNT_FILE, "w");
if (!f)
return -errno;
fclose(f);
return 0;
}
int wait_mount_user()
{
int fd, wd;
char buffer[EVENT_BUF_LEN];
int length;
struct pollfd fds[FD_POLL_MAX];
int i;
fd = access(LAZY_MOUNT_CHECK_FILE, F_OK);
if (fd == 0)
return 0;
fd = inotify_init();
if (fd < 0)
return -errno;
wd = inotify_add_watch(fd, LAZY_MOUNT_CHECK_DIR, IN_CREATE|IN_MODIFY|IN_ATTRIB);
fds[FD_POLL_INOTIFY].fd = fd;
fds[FD_POLL_INOTIFY].events = POLLIN;
while (1) {
if (poll(fds, FD_POLL_MAX, -1) < 0) {
inotify_rm_watch(fd, wd);
close(fd);
return -errno;
}
if (fds[FD_POLL_INOTIFY].revents & POLLIN) {
length = read(fds[FD_POLL_INOTIFY].fd, buffer, EVENT_BUF_LEN);
if (length < 0) {
inotify_rm_watch(fd, wd);
close(fd);
return -errno;
}
i = 0;
while (i < length) {
struct inotify_event *event = (struct inotify_event *) &buffer[i];
if (event->len > 0 && event->len < EVENT_NAME_MAX) {
if (event->mask & (IN_CREATE|IN_MODIFY|IN_ATTRIB)) {
if (!(event->mask & IN_ISDIR)) {
if (!strncmp(event->name, UNLOCK_MNT_STR, sizeof(UNLOCK_MNT_STR))) {
inotify_rm_watch(fd, wd);
close(fd);
return 0;
}
}
}
}
i += EVENT_SIZE + event->len;
}
}
}
inotify_rm_watch(fd, wd);
close(fd);
return -1;
}
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