void lwl_udev_monitor_rd(void)
{
struct udev_device *d;
LOG_UDEV("monitor:starting processing of udev input event\n");
d=udev_monitor_receive_device(monitor);
if(!d){
PERRC("fatal:udev:monitor:unable to get device\n");
exit(LWL_ERR);
}
void *action=(void*)udev_device_get_action(d);
if(!action) goto unref_device;
void *sysname=(void*)udev_device_get_sysname(d);
void *subsys=(void*)udev_device_get_subsystem(d);
LOG_UDEV("monitor:action=%s seq=%lld subsystem=%s sysname=%s\n",action,
udev_device_get_seqnum(d),subsys,sysname);
if(!strncmp(action,"add",cs_n("add"))){
if(!strncmp(INPUT_STR,subsys,cs_n(INPUT_STR)))
input_device_add(d);
else if(!strncmp(DCE6_DISPLAY_STR,subsys,cs_n(DCE6_DISPLAY_STR))){
struct gbl *o=output_plugged(d);
if(o) registry_gbl_ref(o);
}
}else if (!strncmp(action,"remove",cs_n("remove"))){
if(!strncmp(INPUT_STR,subsys,cs_n(INPUT_STR)))
//XXX:The evdev device may be already gone with a fd error which would
//have killed the device. This is for udev based removal of a device.
lwl_evdev_remove((void*)udev_device_get_devnode(d));
else if(!strncmp(DCE6_DISPLAY_STR,subsys,cs_n(DCE6_DISPLAY_STR))){
struct gbl *o=output_gone(d);
if(o) registry_gbl_unref(o);
}
}
unref_device:
udev_device_unref(d);
LOG_UDEV("monitor:end of udev input event processing\n");
}
int main( int argc, char** argv ) {
int rc = 0;
char pathbuf[PATH_MAX+1];
struct udev* udev_client = NULL;
struct udev_monitor* monitor = NULL;
int monitor_fd = 0;
struct udev_device* dev = NULL;
struct pollfd pfd[1];
int num_events = INT_MAX;
int num_forks = 0;
// usage: $0 [num events to process [num times to fork]]
if( argc > 1 ) {
char* tmp = NULL;
num_events = (int)strtol( argv[1], &tmp, 10 );
if( tmp == argv[1] || *tmp != '\0' ) {
fprintf(stderr, "Usage: %s [number of events to process [number of times to fork]]\n", argv[0] );
exit(1);
}
if( argc > 2 ) {
num_forks = (int)strtol( argv[2], &tmp, 10 );
if( tmp == argv[2] || *tmp != '\0' ) {
fprintf(stderr, "Usage: %s [number of events to process [number of times to fork]]\n", argv[0] );
exit(1);
}
}
}
// make sure events dir exists
log_trace("events directory '%s'", UDEV_FS_EVENTS_DIR);
rc = mkdir( UDEV_FS_EVENTS_DIR, 0700 );
if( rc != 0 ) {
rc = -errno;
if( rc != -EEXIST ) {
log_error("mkdir('%s') rc = %d", UDEV_FS_EVENTS_DIR, rc );
exit(1);
}
}
udev_monitor_fs_events_path( "", pathbuf, 0 );
printf("Watching '%s'\n", pathbuf );
udev_client = udev_new();
if( udev_client == NULL ) {
// OOM
exit(2);
}
monitor = udev_monitor_new_from_netlink( udev_client, "udev" );
if( monitor == NULL ) {
// OOM or error
udev_unref( udev_client );
exit(2);
}
printf("Press Ctrl-C to quit\n");
monitor_fd = udev_monitor_get_fd( monitor );
if( monitor_fd < 0 ) {
rc = -errno;
log_error("udev_monitor_get_fd rc = %d\n", rc );
exit(3);
}
pfd[0].fd = monitor_fd;
pfd[0].events = POLLIN;
while( num_events > 0 ) {
// wait for the next device
rc = poll( pfd, 1, -1 );
if( rc < 0 ) {
log_error("poll(%d) rc = %d\n", monitor_fd, rc );
break;
}
// get devices
while( num_events > 0 ) {
dev = udev_monitor_receive_device( monitor );
if( dev == NULL ) {
break;
}
int pid = getpid();
struct udev_list_entry *list_entry = NULL;
printf("[%d] [%d] ACTION: '%s'\n", pid, num_events, udev_device_get_action( dev ) );
printf("[%d] [%d] SEQNUM: %llu\n", pid, num_events, udev_device_get_seqnum( dev ) );
printf("[%d] [%d] USEC: %llu\n", pid, num_events, udev_device_get_usec_since_initialized( dev ) );
printf("[%d] [%d] DEVNODE: '%s'\n", pid, num_events, udev_device_get_devnode( dev ) );
printf("[%d] [%d] DEVPATH: '%s'\n", pid, num_events, udev_device_get_devpath( dev ) );
printf("[%d] [%d] SYSNAME: '%s'\n", pid, num_events, udev_device_get_sysname( dev ) );
printf("[%d] [%d] SYSPATH: '%s'\n", pid, num_events, udev_device_get_syspath( dev ) );
printf("[%d] [%d] SUBSYSTEM: '%s'\n", pid, num_events, udev_device_get_subsystem( dev ) );
printf("[%d] [%d] DEVTYPE: '%s'\n", pid, num_events, udev_device_get_devtype( dev ) );
printf("[%d] [%d] SYSNUM: '%s'\n", pid, num_events, udev_device_get_sysnum( dev ) );
printf("[%d] [%d] DRIVER: '%s'\n", pid, num_events, udev_device_get_driver( dev ) );
printf("[%d] [%d] DEVNUM: %d:%d\n", pid, num_events, major( udev_device_get_devnum( dev ) ), minor( udev_device_get_devnum( dev ) ) );
printf("[%d] [%d] IFINDEX: '%s'\n", pid, num_events, udev_device_get_property_value( dev, "IFINDEX" ) );
printf("[%d] [%d] DEVMODE: '%s'\n", pid, num_events, udev_device_get_property_value( dev, "DEVMODE" ) );
printf("[%d] [%d] DEVUID: '%s'\n", pid, num_events, udev_device_get_property_value( dev, "DEVUID" ) );
printf("[%d] [%d] DEVGID: '%s'\n", pid, num_events, udev_device_get_property_value( dev, "DEVGID" ) );
list_entry = udev_device_get_devlinks_list_entry( dev );
udev_list_entry_foreach( list_entry, udev_list_entry_get_next( list_entry )) {
printf("[%d] [%d] devlink: '%s'\n", pid, num_events, udev_list_entry_get_name( list_entry ) );
}
list_entry = udev_device_get_properties_list_entry( dev );
udev_list_entry_foreach( list_entry, udev_list_entry_get_next( list_entry )) {
printf("[%d] [%d] property: '%s' = '%s'\n", pid, num_events, udev_list_entry_get_name( list_entry ), udev_list_entry_get_value( list_entry ) );
}
list_entry = udev_device_get_tags_list_entry( dev );
udev_list_entry_foreach( list_entry, udev_list_entry_get_next( list_entry )) {
printf("[%d] [%d] tag: '%s'\n", pid, num_events, udev_list_entry_get_name( list_entry ) );
}
