diff options
| -rw-r--r-- | backends/evdev.c | 27 | ||||
| -rw-r--r-- | backends/evdev.md | 3 |
2 files changed, 17 insertions, 13 deletions
diff --git a/backends/evdev.c b/backends/evdev.c index 3dbf837..8f7c4f9 100644 --- a/backends/evdev.c +++ b/backends/evdev.c @@ -113,12 +113,14 @@ static int evdev_attach(instance* inst, evdev_instance_data* data, char* node){ static char* evdev_find(char* name){ int fd = -1; struct dirent* file = NULL; - char file_path[PATH_MAX * 2]; + char file_path[PATH_MAX * 2], *result = calloc(PATH_MAX * 2, sizeof(char)); DIR* nodes = opendir(INPUT_NODES); - char device_name[UINPUT_MAX_NAME_SIZE], *result = NULL; + char device_name[UINPUT_MAX_NAME_SIZE]; + size_t min_distance = -1, distance = 0; if(!nodes){ LOGPF("Failed to query input device nodes in %s: %s", INPUT_NODES, strerror(errno)); + free(result); return NULL; } @@ -141,20 +143,23 @@ static char* evdev_find(char* name){ close(fd); if(!strncmp(device_name, name, strlen(name))){ - LOGPF("Matched name %s for %s: %s", device_name, name, file_path); - break; + distance = strlen(device_name) - strlen(name); + LOGPF("Matched name %s as candidate (distance %" PRIsize_t ") for %s: %s", device_name, distance, name, file_path); + if(distance < min_distance){ + strncpy(result, file_path, (PATH_MAX * 2) - 1); + min_distance = distance; + } } } } - if(file){ - result = calloc(strlen(file_path) + 1, sizeof(char)); - if(result){ - strncpy(result, file_path, strlen(file_path)); - } - } - closedir(nodes); + + if(!result[0]){ + free(result); + return NULL; + } + LOGPF("Using %s for input name %s", result, name); return result; } diff --git a/backends/evdev.md b/backends/evdev.md index bf192b0..e7ba3cc 100644 --- a/backends/evdev.md +++ b/backends/evdev.md @@ -16,7 +16,7 @@ This functionality may require elevated privileges (such as special group member | Option | Example value | Default value | Description | |---------------|-----------------------|---------------|-------------------------------------------------------| | `device` | `/dev/input/event1` | none | `evdev` device to use as input device | -| `input` | `Xbox Wireless` | none | Presentation name of evdev device to use as input (prefix-matched), can be used instead of the `device` option | +| `input` | `Xbox Wireless` | none | Presentation name of evdev device to use as input (most-specific prefix matched), can be used instead of the `device` option | | `output` | `My Input Device` | none | Output device presentation name. Setting this option enables the instance for output | | `exclusive` | `1` | `0` | Prevent other processes from using the device | | `id` | `0x1 0x2 0x3` | none | Set output device bus identification (Vendor, Product and Version), optional | @@ -49,7 +49,6 @@ If relative axes are used without specifying their extents, the channel will gen of `0`, `0.5` and `1` for any input less than, equal to and greater than `0`, respectively. As for output, only the values `-1`, `0` and `1` are generated for the same interval. - #### Channel specification A channel is specified by its event type and event code, separated by `.`. For a complete list of event types and codes |