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131afcd81a
Create a lockfile at /run/lock/power_override/battery_tool.lock rather than /run/lock/battery_tool_powerd.lock so that powerd doesn't need to special-case the file's path. BUG=chromium:784651 BRANCH=None TEST=None Change-Id: I151cf26d635dc969d113e9d80c93177985a7ab2f Signed-off-by: Daniel Erat <derat@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/809921 Commit-Ready: Dan Erat <derat@chromium.org> Tested-by: Dan Erat <derat@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
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* This file is ported from the flashrom project.
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*
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* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* powerd_lock.c: power management routines
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "powerd_lock.h"
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/*
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* Path to a file containing flashrom's PID. While present, powerd avoids
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* suspending or shutting down the system.
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*/
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static const char lock_file_path[] =
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"/run/lock/power_override/battery_tool.lock";
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int disable_power_management()
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{
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FILE *lock_file;
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int rc = 0;
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lock_file = fopen(lock_file_path, "w");
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if (!lock_file)
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return POWERD_CREATE_LOCK_FILE_ERROR;
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if (fprintf(lock_file, "%ld", (long)getpid()) < 0)
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rc = POWERD_WRITE_LOCK_FILE_ERROR;
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if (fclose(lock_file) != 0)
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rc |= POWERD_CLOSE_LOCK_FILE_ERROR;
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return rc;
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}
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int restore_power_management()
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{
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int result = 0;
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result = unlink(lock_file_path);
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if (result != 0 && errno != ENOENT)
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return POWERD_DELETE_LOCK_FILE_ERROR;
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return 0;
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}
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