Skip to content

Instantly share code, notes, and snippets.

@mhashim6

mhashim6/getc.c

Created April 18, 2019 17:12
Show Gist options
  • Save mhashim6/7c21f8338f43a7e1ca36da4459661605 to your computer and use it in GitHub Desktop.
Save mhashim6/7c21f8338f43a7e1ca36da4459661605 to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. mhashim6 created this gist Apr 18, 2019.
    33 changes: 33 additions & 0 deletions getc.c
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,33 @@
    #include <fcntl.h>
    #include <signal.h>
    #include <stdint.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <unistd.h>

    #include <sys/mman.h>
    #include <sys/termios.h>
    #include <sys/time.h>
    #include <sys/types.h>

    struct termios original_tio;
    void disable_input_buffering() {
    tcgetattr(STDIN_FILENO, &original_tio);
    struct termios new_tio = original_tio;
    new_tio.c_lflag &= ~ICANON & ~ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);
    }

    void restore_input_buffering() {
    tcsetattr(STDIN_FILENO, TCSANOW, &original_tio);
    }

    int main() {
    disable_input_buffering();
    char c = getc(stdin);
    printf("%c\n", c);
    restore_input_buffering();
    c = getc(stdin);
    printf("%c\n", c);
    }