Linux 使用uinput创建虚拟input设备

来源：互联网发布：聂卫平与高层关系知乎编辑：程序博客网时间：2024/04/29 18:20

参考了这里：http://thiemonge.org/getting-started-with-uinput

代码如下：

#include <linux/input.h>#include <linux/uinput.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <unistd.h>#include <string.h>#include <stdint.h>#include <stdio.h>int reportkey(int fd, uint16_t type, uint16_t keycode, int32_t value){int ret;struct input_event ev;memset(&ev, 0, sizeof(struct input_event));ev.type = type;ev.code = keycode;ev.value = value;ret = write(fd, &ev, sizeof(struct input_event));if (ret < 0) {printf("report key error!\n");return ret;}/*printf("key is %d %d\n", keycode, value);*/return 0;}int main(void){struct uinput_user_dev uidev;int fd, ret;fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);if (fd < 0) {return fd;}ret = ioctl(fd, UI_SET_EVBIT, EV_KEY);ret = ioctl(fd, UI_SET_EVBIT, EV_SYN);ret = ioctl(fd, UI_SET_KEYBIT, KEY_D);memset(&uidev, 0, sizeof(struct uinput_user_dev));snprintf(uidev.name, UINPUT_MAX_NAME_SIZE, "uinput-sample");uidev.id.bustype = BUS_USB;uidev.id.vendor = 0x1234;uidev.id.product = 0xfedc;uidev.id.version = 1;ret = write(fd, &uidev, sizeof(struct uinput_user_dev));ret = ioctl(fd, UI_DEV_CREATE);if (ret < 0) {close(fd);return ret;}while (1) {reportkey(fd, EV_KEY, KEY_D, 1);reportkey(fd, EV_SYN, SYN_REPORT, 0);reportkey(fd, EV_KEY, KEY_D, 0);reportkey(fd, EV_SYN, SYN_REPORT, 0);sleep(1);}ioctl(fd, UI_DEV_DESTROY);close(fd);return 0;}

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