mirror of
https://github.com/FeralInteractive/gamemode.git
synced 2025-06-06 15:47:20 +02:00
e90bd98d64
This exposed a bunch of issues that needed dealing with to ensure the code is clean and sane. Notably the dlopen/dlsym routine has been altered to closer match the LSI approach of safe symbol binding, by not attempting to directly cast the result of a dlsym operation. Instead, if we succeed in getting the dlsym() pointer, we memcpy this to the target and ensure we have the correct constraints. Note that in sanitizing the log helpers, I opted to remove the varargs ability from FATAL_ERRNO given this is used exactly like perror() and there are no examples currently using varargs with this in the tree. This allowed me to keep the log helpers as macros and not have to implement wrapper functions. Signed-off-by: Ikey Doherty <ikey@solus-project.com>
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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Copyright (c) 2017, Feral Interactive
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Feral Interactive nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* Simple daemon to allow user space programs to control the CPU governors
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*
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* The main process is responsible for bootstrapping the D-BUS daemon, caching
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* the initial governor settings, and then responding to requests over D-BUS.
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*
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* Clients register their pid(s) with the service, which are routinely checked
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* to see if they've expired. Once we reach our first actively registered client
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* we put the system into "game mode", i.e. move the CPU governor into a performance
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* mode.
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*
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* Upon exit, or when all clients have stopped running, we put the system back
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* into the default governor policy, which is invariably powersave or similar
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* on laptops. This ensures that the system is obtaining the maximum performance
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* whilst gaming, and allowed to sanely return to idle once the workload is
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* complete.
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*/
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#define _GNU_SOURCE
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#include "daemonize.h"
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#include "dbus_messaging.h"
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#include "gamemode.h"
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#include "logging.h"
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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static void sigint_handler(__attribute__((unused)) int signo)
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{
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LOG_MSG("Quitting by request...\n");
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/* Clean up nicely */
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game_mode_context_destroy(game_mode_context_instance());
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exit(EXIT_SUCCESS);
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}
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/**
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* Main bootstrap entry into gamemoded
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*/
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int main(int argc, char *argv[])
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{
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GameModeContext *context = NULL;
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/* Gather command line options */
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bool daemon = false;
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bool use_syslog = false;
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int opt = 0;
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while ((opt = getopt(argc, argv, "dl")) != -1) {
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switch (opt) {
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case 'd':
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daemon = true;
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break;
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case 'l':
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use_syslog = true;
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break;
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default:
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fprintf(stderr, "Usage: %s [-d] [-l]\n", argv[0]);
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exit(EXIT_FAILURE);
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break;
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}
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}
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/* If syslog is requested, set it up with our process name */
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if (use_syslog) {
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set_use_syslog(argv[0]);
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}
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/* Daemonize ourselves first if asked */
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if (daemon) {
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daemonize(argv[0]);
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}
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/* Set up the game mode context */
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context = game_mode_context_instance();
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game_mode_context_init(context);
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/* Handle quits cleanly */
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if (signal(SIGINT, sigint_handler) == SIG_ERR) {
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FATAL_ERRORNO("Could not catch SIGINT");
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}
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/* Run the main dbus message loop */
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game_mode_context_loop(context);
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game_mode_context_destroy(context);
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/* Log we're finished */
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LOG_MSG("Quitting naturally...\n");
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}
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