Input/Output function

[maths_fan]

Don't you know the function that can make input without writing
charecters on the output (under UNIX). I mean something like, when you
write Password on Unix, you write and the charecters are not seen, but
there are written in the buffer. Does anyone know any Unix library
(maybe a function that can do it). There is no in stdio.h as I found
out

 

[Jonas Mellin]

Don't you know the function that can make input without writing
charecters on the output (under UNIX). I mean something like, when you
write Password on Unix, you write and the charecters are not seen, but
there are written in the buffer. Does anyone know any Unix library
(maybe a function that can do it). There is no in stdio.h as I found
out

This is probably off-topic to this newsgroup, but here's my 2c:
Two possible solutions: Have a look at the 'curses' package or the
relevant ioctl calls for the tty (or pty) special file connecting to
your terminal/window. The former is simpler than the latter.

 

[Richard Bos]

Don't you know the function that can make input without writing
charecters on the output (under UNIX). I mean something like, when you
write Password on Unix, you write and the charecters are not seen, but
there are written in the buffer. Does anyone know any Unix library
(maybe a function that can do it). There is no in stdio.h as I found
out

<http://www.eskimo.com/~scs/C-faq/q19.1.html>.

HTH; HAND.

Richard

 

[Dan Pop]

Don't you know the function that can make input without writing
charecters on the output (under UNIX). I mean something like, when you
write Password on Unix, you write and the charecters are not seen, but
there are written in the buffer. Does anyone know any Unix library
(maybe a function that can do it). There is no in stdio.h as I found
out

getchar() works just fine, once you have disabled echoing, e.g. with
the stty command (that you can execute from your program with a
system() call).

Dan

 

[Ed Morton]

Don't you know the function that can make input without writing
charecters on the output (under UNIX). I mean something like, when you
write Password on Unix, you write and the charecters are not seen, but
there are written in the buffer. Does anyone know any Unix library
(maybe a function that can do it). There is no in stdio.h as I found
out

Someone posted this a while back:

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

static struct termios stored_settings;

void echo_off(void)
{
struct termios new_settings;
tcgetattr(0,&stored_settings);
new_settings = stored_settings;
new_settings.c_lflag &= (~ECHO);
tcsetattr(0,TCSANOW,&new_settings);
return;
}

void echo_on(void)
{
tcsetattr(0,TCSANOW,&stored_settings);
return;
}

int main()
{
int ch;
int ph = '*';
echo_off();
while((ch = getchar()) != EOF)
putchar(ph);
echo_on();

return 0;
}

Unfortunately I don't recall who to credit for it.

Regards,

Ed.

 

[Sergei Karasiov]

hi,

your terminal/window. The former is simpler than the latter.

http://www.faqs.org/faqs/unix-faq/programmer/faq/ read question 3.1

WBR SK