int uf_create_pidfile() {
char pidtxt[128];
size_t l;
int fd;
if(!uf_return_running() && (fd = open(G15DAEMON_PIDFILE, O_CREAT|O_RDWR|O_EXCL, 0644)) < 0) {
g15daemon_log(LOG_ERR,"previous G15Daemon process died. removing pidfile");
unlink(G15DAEMON_PIDFILE);
}
if ((fd = open(G15DAEMON_PIDFILE, O_CREAT|O_RDWR|O_EXCL, 0644)) < 0) {
return 1;
}
snprintf(pidtxt, sizeof(pidtxt), "%lu\n", (unsigned long) getpid());
if (write(fd, pidtxt, l = strlen(pidtxt)) != l) {
g15daemon_log(LOG_WARNING, "write(): %s", strerror(errno));
unlink(G15DAEMON_PIDFILE);
}
if(fd>0) {
close(fd);
return 0;
}
return 1;
}
int uf_return_running(){
int fd;
char pidtxt[128];
int pid;
int l;
if ((fd = open(G15DAEMON_PIDFILE, O_RDWR, 0644)) < 0) {
return -1;
}
if((l = read(fd,pidtxt,sizeof(pidtxt)-1)) < 0) {
unlink (G15DAEMON_PIDFILE);
close(fd);
return -1;
}
if((pid = atoi(pidtxt)) <= 0) {
g15daemon_log(LOG_ERR,"pidfile corrupt");
unlink(G15DAEMON_PIDFILE);
close(fd);
return -1;
}
if((kill(pid,0) != 0) && errno != EPERM ) {
g15daemon_log(LOG_ERR,"Process died - removing pidfile");
unlink(G15DAEMON_PIDFILE);
close(fd);
return -1;
}
return pid;
}
static int g15_init_uinput(void *plugin_args) {
int i=0;
char *custom_filename;
g15daemon_t *masterlist = (g15daemon_t*) plugin_args;
struct uinput_user_dev uinp;
static const char *uinput_device_fn[] = { "/dev/uinput", "/dev/input/uinput","/dev/misc/uinput",0};
uinput_cfg = g15daemon_cfg_load_section(masterlist,"Keyboard OS Mapping (uinput)");
custom_filename = g15daemon_cfg_read_string(uinput_cfg, "device",(char*)uinput_device_fn[1]);
map_Lkeys=g15daemon_cfg_read_int(uinput_cfg, "Lkeys.mapped",0);
seteuid(0);
setegid(0);
while (uinput_device_fn[i] && (uinp_fd = open(uinput_device_fn[i],O_RDWR))<0){
++i;
}
if(uinp_fd<0) { /* try reading the users preference in the config */
uinp_fd = open(custom_filename,O_RDWR);
}
if(uinp_fd<0){
g15daemon_log(LOG_ERR,"Unable to open UINPUT device. Please ensure the uinput driver is loaded into the kernel and that you have permission to open the device.");
return -1;
}
/* all other processes/threads should be seteuid nobody */
seteuid(masterlist->nobody->pw_uid);
setegid(masterlist->nobody->pw_gid);
memset(&uinp,0,sizeof(uinp));
strncpy(uinp.name, "G15 Extra Keys", UINPUT_MAX_NAME_SIZE);
uinp.id.version = 4;
uinp.id.bustype = BUS_USB;
ioctl(uinp_fd, UI_SET_EVBIT, EV_KEY);
for (i=0; i<256; ++i)
ioctl(uinp_fd, UI_SET_KEYBIT, i);
write(uinp_fd, &uinp, sizeof(uinp));
if (ioctl(uinp_fd, UI_DEV_CREATE))
{
g15daemon_log(LOG_ERR,"Unable to create UINPUT device.");
return -1;
}
return 0;
}
/* handy function from xine_utils.c */
void *g15daemon_xmalloc(size_t size) {
void *ptr;
/* prevent xmalloc(0) of possibly returning NULL */
if( !size )
size++;
if((ptr = calloc(1, size)) == NULL) {
g15daemon_log(LOG_WARNING, "g15_xmalloc() failed: %s.\n", strerror(errno));
return NULL;
}
return ptr;
}
