48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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#include <termios.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define TERMINAL_FD 0
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#define MAX_CHARS 50
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int main()
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{
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// Declaring the variables we'll be using.
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struct termios old, new;
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char *input;
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// Grabbing terminal settings.
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tcgetattr(TERMINAL_FD, &old);
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new = old;
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// Getting memory from the heap for the input string.
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input = malloc(sizeof(char) * MAX_CHARS);
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/*
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* Turning off echo. I figured out how to do
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* this using the man page given here:
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* http://man7.org/linux/man-pages/man3/termios.3.html/
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*/
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printf("Disabling echo.\n");
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new.c_lflag = new.c_lflag & ~ECHO;
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tcsetattr(TERMINAL_FD, TCSANOW, &new);
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// Entering phrase without echo!
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printf("Enter secret word/phrase: ");
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fgets(input, MAX_CHARS, stdin);
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printf("\nYou entered: %s\n", input);
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// Reverting settings.
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printf("Default behavior restored.\n");
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tcsetattr(TERMINAL_FD, TCSANOW, &old);
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// Entering phrase with echo.
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printf("Enter visible word/phrase: ");
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fgets(input, MAX_CHARS, stdin);
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printf("You entered: %s", input);
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// Freeing memory allocated.
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free(input);
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return 0;
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}
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