blob: df34d03c6c2b8716f812440408a42e99f43e8824 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* This file is ported from the flashrom project.
*
* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* powerd_lock.c: power management routines
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "powerd_lock.h"
/*
* Path to a file containing flashrom's PID. While present, powerd avoids
* suspending or shutting down the system.
*/
static const char lock_file_path[] =
"/run/lock/power_override/battery_tool.lock";
int disable_power_management()
{
FILE *lock_file;
int rc = 0;
lock_file = fopen(lock_file_path, "w");
if (!lock_file)
return POWERD_CREATE_LOCK_FILE_ERROR;
if (fprintf(lock_file, "%ld", (long)getpid()) < 0)
rc = POWERD_WRITE_LOCK_FILE_ERROR;
if (fclose(lock_file) != 0)
rc |= POWERD_CLOSE_LOCK_FILE_ERROR;
return rc;
}
int restore_power_management()
{
int result = 0;
result = unlink(lock_file_path);
if (result != 0 && errno != ENOENT)
return POWERD_DELETE_LOCK_FILE_ERROR;
return 0;
}
|
