From 3a15da130f8212f9ff7273673c2ce8c3a8bed859 Mon Sep 17 00:00:00 2001 From: cbdev Date: Sun, 18 Feb 2018 03:22:37 +0100 Subject: Rename uinput backend to evdev --- uinput.c | 486 --------------------------------------------------------------- 1 file changed, 486 deletions(-) delete mode 100644 uinput.c (limited to 'uinput.c') diff --git a/uinput.c b/uinput.c deleted file mode 100644 index cf86959..0000000 --- a/uinput.c +++ /dev/null @@ -1,486 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include -#include - -#include "midimonster.h" -#include "uinput.h" - -#define BACKEND_NAME "uinput" -#define UINPUT_PATH "/dev/uinput" - -int init() { - - backend uinput = { - .name = BACKEND_NAME, - .conf = backend_configure, - .create = backend_instance, - .conf_instance = backend_configure_instance, - .channel = backend_channel, - .handle = backend_set, - .process = backend_handle, - .start = backend_start, - .shutdown = backend_shutdown - }; - - if (mm_backend_register(uinput)) { - fprintf(stderr, "Failed to register uinput backend\n"); - return 1; - } - - return 0; -} - -static int backend_configure(char* option, char* value) { - fprintf(stderr, "Not implemented\n"); - return 0; -} - -static int backend_configure_instance(instance* inst, char* option, char* value) { - uinput_instance* data = (uinput_instance*) inst->impl; - - if (!strcmp(option, "device")) { - if (data->device_path) { - free(data->device_path); - } - data->device_path = strdup(value); - - if (!data->device_path) { - fprintf(stderr, "Failed to allocate memory for device path: %s\n", strerror(errno)); - return 1; - } - } else if (!strcmp(option, "exclusive")) { - data->exclusive = strtoul(value, NULL, 10); - } else if (!strcmp(option, "name")) { - if (data->name) { - free(data->name); - } - - data->name = strdup(value); - - if (!data->name) { - fprintf(stderr, "Failed to allocate memory for name: %s\n", strerror(errno)); - return 1; - } - } else { - fprintf(stderr, "Unkown configuration parameter %s for uinput backend\n", option); - return 1; - } - return 0; -} - -static channel* backend_channel(instance* inst, char* spec) { - uinput_instance* data = (uinput_instance*) inst->impl; - char* next = spec; - // type - unsigned long type = strtoul(spec, &next, 10); - - if (spec == next) { - fprintf(stderr, "Cannot parse type\n"); - return NULL; - } - - if (type >= EV_MAX) { - fprintf(stderr, "Type is out of range\n"); - return NULL; - } - - if (next[0] != '.') { - fprintf(stderr, "Cannot parse code. Unknown character %c\n", next[0]); - return NULL; - } - - spec = next + 1; - - unsigned long code = strtoul(spec, &next, 10); - - if (spec == next) { - fprintf(stderr, "Cannot parse code\n"); - return NULL; - } - - if (type == EV_SYN && code >= SYN_MAX) { - fprintf(stderr, "Code is out of range. Limit for SYN is %d\n", SYN_MAX); - } else if (type == EV_KEY && code >= KEY_MAX) { - fprintf(stderr, "Code is out of range. Limit for KEY is %d\n", KEY_MAX); - return NULL; - } else if (type == EV_REL && code >= REL_MAX) { - fprintf(stderr, "Code is out of range. Limit for REL is %d\n", REL_MAX); - return NULL; - } else if (type == EV_ABS && code >= ABS_MAX) { - fprintf(stderr, "Code is out of range. Limit for ABS is %d\n", ABS_MAX); - return NULL; - } else if (type == EV_SW && code >= SW_MAX) { - fprintf(stderr, "Code is out of range. Limit for SW is %d\n", SW_MAX); - return NULL; - } else if (type == EV_MSC && code >= MSC_MAX) { - fprintf(stderr, "Code is out of range. Limit for MSC is %d\n", MSC_MAX); - return NULL; - } else if (type == EV_LED && code >= LED_MAX) { - fprintf(stderr, "Code is out of range. Limit for LED is %d\n", LED_MAX); - return NULL; - } else if (type == EV_REP && code >= REP_MAX) { - fprintf(stderr, "Code is out of range. Limit for REP is %d\n", REP_MAX); - return NULL; - } else if (type == EV_SND && code >= SND_MAX) { - fprintf(stderr, "Code is out of range. Limit for SND is %d\n", SND_MAX); - } - - uint64_t u; - if (next[0] == '.') { - spec = next + 1; - long value = strtol(spec, &next, 10); - if (spec == next) { - fprintf(stderr, "Cannot parse value\n"); - return NULL; - } - if (type == EV_KEY && (value != 0 && value != 1)) { - fprintf(stderr, "Value of KEY %ld is out of range. Only values 0 and 1 are supported for KEY.\n", value); - return NULL; - } - // find event with value - for (u = 0; u < data->size_events; u++) { - if (data->events[u].type == type - && data->events[u].code == code - && data->events[u].value == value) { - break; - } - } - } else if (next[0] != '\0') { - fprintf(stderr, "Unkown characters: %s\n", next); - return NULL; - } else { - // find event - for (u = 0; u < data->size_events; u++) { - if (data->events[u].type == type - && data->events[u].code == code) { - break; - } - } - } - - // check if no event was found - if (u == data->size_events) { - fprintf(stderr, "Alloc dev %ld: %ld, %ld\n", u, type, code); - data->events = realloc(data->events, (u + 1) * sizeof(struct input_event)); - - if (!data->events) { - fprintf(stderr, "Failed to allocate memory\n"); - return NULL; - } - - data->events[u].type = (uint16_t) type; - data->events[u].code = (uint16_t) code; - data->size_events++; - } - return mm_channel(inst, u, 1); -} - -static instance* backend_instance() { - instance* inst = mm_instance(); - if (!inst) { - return NULL; - } - - inst->impl = calloc(1, sizeof(uinput_instance)); - if (!inst->impl) { - fprintf(stderr, "Failed to allocate memory for instance\n"); - return NULL; - } - return inst; -} - -static channel_value uinput_normalize(uinput_instance* data, uint64_t ident, struct input_event* event) { - channel_value value = {}; - - switch (event->type) { - case EV_KEY: - value.normalised = event->value > 0; - break; - case EV_REL: - if (event->value > 0) { - value.normalised = 1.0; - } else { - value.normalised = 0.0; - } - break; - } - - return value; -} - -static uint32_t uinput_convert_normalised(struct input_event event, channel_value* value) { - switch (event.type) { - case EV_KEY: - return value->normalised < 0.5; - case EV_REL: - return (value->normalised < 0.5) - 1; - default: - return value->normalised < 0.5; - } -} - - -static int backend_handle(size_t num, managed_fd* fds) { - struct input_event event; - ssize_t bytes = 0; - uint64_t ident; - - uinput_instance* data; - - channel* channel; - for (int i = 0; i < num; i++) { - bytes = read(fds[i].fd, &event, sizeof(struct input_event)); - - if (bytes < sizeof(struct input_event)) { - fprintf(stderr, "Failed to read an complete event\n"); - return 1; - } - data = (uinput_instance*) fds[0].impl; - for (ident = 0; ident < data->size_events; ident++) { - if (data->events[ident].type == event.type - && data->events[ident].code == event.code) { - break; - } - } - fprintf(stderr, "Found event: %d, %d, %d (%ld/%ld)\n", event.type, event.code, event.value, ident, data->size_events); - - if (ident >= data->size_events) { - fprintf(stderr, "Event not registered.\n"); - continue; - } - channel = mm_channel(mm_instance_find(BACKEND_NAME, data->ident), ident, 0); - - if (channel) { - fprintf(stderr, "Channel found\n"); - if (mm_channel_event(channel, uinput_normalize(data, ident, &event))) { - return 1; - } - } - } - - return 0; -} - -static int uinput_open_input_device(uinput_instance* data) { - if (!data->device_path) { - return 0; - } - - data->fd_in = open(data->device_path, O_RDONLY | O_NONBLOCK); - - if (data->fd_in < 0) { - fprintf(stderr, "Failed to open device %s: %s\n", data->device_path, strerror(errno)); - return 1; - } - int grab = data->exclusive; - if (ioctl(data->fd_in, EVIOCGRAB, &grab) > 0) { - fprintf(stderr, "Cannot set exclusive lock on device %s\n", data->device_path); - close(data->fd_in); - data->fd_in = -1; - return 1; - } - - if (!mm_manage_fd(data->fd_in, BACKEND_NAME, 1, data)) { - return 1; - } - - return 0; -} - -static int enable_device_keys(uinput_instance* data, int uinput_fd, struct uinput_user_dev* dev) { - unsigned int u; - int ret; - int action; - uint8_t first_bits[EV_CNT]; - memset(first_bits, 0, EV_CNT * sizeof(uint8_t)); - for (u = 0; u < data->size_events; u++) { - if (data->events[u].type < EV_MAX && !first_bits[data->events[u].type]) { - ret = ioctl(uinput_fd, UI_SET_EVBIT, data->events[u].type); - - if (ret < 0) { - fprintf(stderr, "Cannot enable type: %d\n", data->events[u].type); - return 1; - } - } - switch (data->events[u].type) { - case EV_KEY: - action = UI_SET_KEYBIT; - break; - case EV_ABS: - action = UI_SET_ABSBIT; - break; - case EV_REL: - action = UI_SET_RELBIT; - break; - case EV_MSC: - action = UI_SET_MSCBIT; - break; - default: - fprintf(stderr, "Event code not supported: %d\n", data->events[u].type); - return 1; - } - ret = ioctl(uinput_fd, action, data->events[u].code); - - if (ret < 0) { - fprintf(stderr, "Cannot enable code: %d\n", data->events[u].code); - return 1; - } - } - return 0; -} - -static int uinput_create_output_device(uinput_instance* data) { - - int uinput_fd = open(UINPUT_PATH, O_WRONLY | O_NONBLOCK); - - if (uinput_fd < 0) { - fprintf(stderr, "Cannot open uinput device: %s\n", strerror(errno)); - return 1; - } - - struct uinput_user_dev dev = {}; - memset(&dev, 0, sizeof(dev)); - strncpy(dev.name, data->name, UINPUT_MAX_NAME_SIZE - 1); - dev.id.bustype = 0; - dev.id.vendor = 0; - dev.id.product = 0; - dev.id.version = 0; - - if (enable_device_keys(data, uinput_fd, &dev)) { - close(uinput_fd); - return 1; - } - // write config to uinput - int ret = write(uinput_fd, &dev, sizeof(dev)); - - if (ret < 0) { - fprintf(stderr, "Cannot write to uinput device: %s\n", strerror(errno)); - close(uinput_fd); - return 1; - } - - ret = ioctl(uinput_fd, UI_DEV_CREATE); - - if (ret < 0) { - fprintf(stderr, "Cannot create device: %s\n", strerror(errno)); - close(uinput_fd); - return 1; - } - - data->fd_out = uinput_fd; - - return 0; -} - -static int backend_start() { - - size_t n; - instance** inst = NULL; - uinput_instance* data; - if (mm_backend_instances(BACKEND_NAME, &n, &inst)) { - fprintf(stderr, "Failed to fetch instance list\n"); - return 1; - } - - if (!n) { - free(inst); - return 0; - } - - for (unsigned p = 0; p < n; p++) { - data = (uinput_instance*) inst[p]->impl; - - if (data->name) { - uinput_create_output_device(data); - } - - if (data->device_path) { - uinput_open_input_device(data); - } - data->ident = p; - inst[p]->ident = data->ident; - } - - free(inst); - return 0; -} - -static int backend_set(instance* inst, size_t num, channel** c, channel_value* v) { - size_t u; - uinput_instance* data; - uint64_t ident; - int ret; - struct input_event event = {}; - - for (u = 0; u < num; u++) { - data = (uinput_instance*) c[u]->instance->impl; - ident = c[u]->ident; - - memcpy(&event, &data->events[ident], sizeof(struct input_event)); - event.value = uinput_convert_normalised(event, v); - - ret = write(data->fd_out, &event, sizeof(event)); - if (ret < 0 ) { - fprintf(stderr, "Cannot write event: %s\n", strerror(errno)); - return 1; - } - event.type = EV_SYN; - event.code = SYN_REPORT; - event.value = 0; - - ret = write(data->fd_out, &event, sizeof(event)); - if (ret < 0) { - fprintf(stderr, "Cannot send SYN_REPORT event: %s\n", strerror(errno)); - return 1; - } - } - - return 0; -} - -static int backend_shutdown() { - uinput_instance* data = NULL; - instance** instances = NULL; - size_t n = 0; - - if (mm_backend_instances(BACKEND_NAME, &n, &instances)) { - fprintf(stderr, "Failed to fetch instance list\n"); - return 1; - } - - if (!n) { - free(instances); - return 0; - } - - for (unsigned p = 0; p < n; p++) { - data = (uinput_instance*) instances[p]->impl; - if (data->fd_in < 0) { - close(data->fd_in); - data->fd_in = -1; - } - - if (data->fd_out < 0) { - int ret = ioctl(data->fd_out, UI_DEV_DESTROY); - - if (ret < 0) { - fprintf(stderr, "Could not destroy device: %s\n", strerror(errno)); - return 1; - } - close(data->fd_out); - data->fd_out = -1; - } - - free(data->events); - free(data->name); - free(data->device_path); - free(data); - } - free(instances); - return 0; -} -- cgit v1.2.3