【C语言】终端一检测到输入后直接输出，不需要按下enter键

代码实现

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>

int main(void)
{
FILE *input;
FILE *output;
struct termios initial_settings, new_settings;
int inputString;

input = fopen("/dev/tty", "r");
output = fopen("/dev/tty", "w");
if(!input || !output)
{
fprintf(stderr, "Unable to open /dev/tty\n");
exit(1);
}

tcgetattr(fileno(input), &initial_settings);
new_settings = initial_settings;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
new_settings.c_lflag &= ~ISIG;

if(tcsetattr(fileno(input), TCSANOW, &new_settings) != 0)
{
fprintf(stderr, "Could not set attributes\n");
}

while(inputString != 'q')
{
do
{
inputString = fgetc(input);
}while(inputString == '\n' || inputString == '\r');
printf("You have input : %c\n", inputString);
}

tcsetattr(fileno(input), TCSANOW, &initial_settings);           // reset the initial settings

exit(0);
}

参考资料