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Move code only used for Wine detection into wine file

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This commit is contained in:
Marc Di Luzio 2019-05-22 17:18:23 +01:00
parent 2bca1fb04e
commit 41988b7f1c
4 changed files with 81 additions and 171 deletions
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96
daemon/gamemode-env.c
View File

@ -1,96 +0,0 @@
/*
Copyright (c) 2017-2019, Feral Interactive
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Feral Interactive nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#define _GNU_SOURCE
#include "gamemode.h"
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/**
* Lookup the process environment for a specific variable or return NULL.
* Requires an open directory FD from /proc/PID.
*/
char *game_mode_lookup_proc_env(const procfd_t proc_fd, const char *var)
{
char *environ = NULL;
int fd = openat(proc_fd, "environ", O_RDONLY | O_CLOEXEC);
if (fd != -1) {
FILE *stream = fdopen(fd, "r");
if (stream) {
/* Read every \0 terminated line from the environment */
char *line = NULL;
size_t len = 0;
size_t pos = strlen(var) + 1;
while (!environ && (getdelim(&line, &len, 0, stream) != -1)) {
/* Find a match including the "=" suffix */
if ((len > pos) && (strncmp(line, var, strlen(var)) == 0) && (line[pos - 1] == '='))
environ = strndup(line + pos, len - pos);
}
free(line);
fclose(stream);
} else
close(fd);
}
/* If found variable is empty, skip it */
if (environ && !strlen(environ)) {
free(environ);
environ = NULL;
}
return environ;
}
/**
* Lookup the home directory of the user in a safe way.
*/
char *game_mode_lookup_user_home(void)
{
/* Try loading env HOME first */
const char *home = secure_getenv("HOME");
if (!home) {
/* If HOME is not defined (or out of context), fall back to passwd */
struct passwd *pw = getpwuid(getuid());
if (!pw)
return NULL;
home = pw->pw_dir;
}
/* Try to allocate into our heap */
return home ? strdup(home) : NULL;
}

61
daemon/gamemode-proc.c
View File

@ -1,61 +0,0 @@
/*
Copyright (c) 2017-2019, Feral Interactive
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Feral Interactive nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#define _GNU_SOURCE
#include "gamemode.h"
#include "helpers.h"
#include <fcntl.h>
#include <linux/limits.h>
#include <unistd.h>
/**
* Opens the process environment for a specific PID and returns
* a file descriptor to the directory /proc/PID. Doing it that way prevents
* the directory going MIA when a process exits while we are looking at it
* and allows us to handle fewer error cases.
*/
procfd_t game_mode_open_proc(const pid_t pid)
{
char buffer[PATH_MAX];
const char *proc_path = buffered_snprintf(buffer, "/proc/%d", pid);
return proc_path ? open(proc_path, O_RDONLY | O_CLOEXEC) : INVALID_PROCFD;
}
/**
* Closes the process environment.
*/
int game_mode_close_proc(const procfd_t procfd)
{
return close(procfd);
}

81
daemon/gamemode-wine.c
View File

@ -37,7 +37,11 @@ POSSIBILITY OF SUCH DAMAGE.
#include <ctype.h>
#include <fcntl.h>
#include <linux/limits.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/**
@ -56,6 +60,83 @@ static bool game_mode_detect_wine_loader(const char *exe)
return (strtail(exe, "/wine") || strtail(exe, "/wine64"));
}
/**
* Opens the process environment for a specific PID and returns
* a file descriptor to the directory /proc/PID. Doing it that way prevents
* the directory going MIA when a process exits while we are looking at it
* and allows us to handle fewer error cases.
*/
static procfd_t game_mode_open_proc(const pid_t pid)
{
char buffer[PATH_MAX];
const char *proc_path = buffered_snprintf(buffer, "/proc/%d", pid);
return proc_path ? open(proc_path, O_RDONLY | O_CLOEXEC) : INVALID_PROCFD;
}
/**
* Closes the process environment.
*/
static int game_mode_close_proc(const procfd_t procfd)
{
return close(procfd);
}
/**
* Lookup the process environment for a specific variable or return NULL.
* Requires an open directory FD from /proc/PID.
*/
static char *game_mode_lookup_proc_env(const procfd_t proc_fd, const char *var)
{
char *environ = NULL;
int fd = openat(proc_fd, "environ", O_RDONLY | O_CLOEXEC);
if (fd != -1) {
FILE *stream = fdopen(fd, "r");
if (stream) {
/* Read every \0 terminated line from the environment */
char *line = NULL;
size_t len = 0;
size_t pos = strlen(var) + 1;
while (!environ && (getdelim(&line, &len, 0, stream) != -1)) {
/* Find a match including the "=" suffix */
if ((len > pos) && (strncmp(line, var, strlen(var)) == 0) && (line[pos - 1] == '='))
environ = strndup(line + pos, len - pos);
}
free(line);
fclose(stream);
} else
close(fd);
}
/* If found variable is empty, skip it */
if (environ && !strlen(environ)) {
free(environ);
environ = NULL;
}
return environ;
}
/**
* Lookup the home directory of the user in a safe way.
*/
static char *game_mode_lookup_user_home(void)
{
/* Try loading env HOME first */
const char *home = secure_getenv("HOME");
if (!home) {
/* If HOME is not defined (or out of context), fall back to passwd */
struct passwd *pw = getpwuid(getuid());
if (!pw)
return NULL;
home = pw->pw_dir;
}
/* Try to allocate into our heap */
return home ? strdup(home) : NULL;
}
/**
* Attempt to resolve the exe for wine-preloader.
* This function is used if game_mode_context_find_exe() identified the

14
daemon/gamemode.h
View File

@ -116,13 +116,6 @@ GameModeConfig *game_mode_config_from_context(const GameModeContext *context);
*/
int game_mode_reload_config(GameModeContext *context);
/** gamemode-env.c
* Provides internal API functions specific to working environment
* variables.
*/
char *game_mode_lookup_proc_env(const procfd_t proc_fd, const char *var);
char *game_mode_lookup_user_home(void);
/** gamemode-ioprio.c
* Provides internal API functions specific to adjusting process
* IO priorities.
@ -130,13 +123,6 @@ char *game_mode_lookup_user_home(void);
int game_mode_get_ioprio(const pid_t client);
void game_mode_apply_ioprio(const GameModeContext *self, const pid_t client, int expected);
/** gamemode-proc.c
* Provides internal API functions specific to working with process
* environments.
*/
procfd_t game_mode_open_proc(const pid_t pid);
int game_mode_close_proc(const procfd_t procfd);
/** gamemode-sched.c
* Provides internal API functions specific to adjusting process
* scheduling.