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Get a user inputted string without displaying it?

 
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Get a user inputted string without displaying it?
kramed
31 Jul, 2008 - 08:37 PM
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Hi there,

I was hoping to find out what I need to look for in order to retrieve a user inputted string without displaying the input to the monitor, exactly like a unix login screen for the password entry.

Thanks
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no2pencil
RE: Get A User Inputted String Without Displaying It?
31 Jul, 2008 - 09:11 PM
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Guessing that you are doing this on Linux : http://linux.about.com/library/cmd/blcmdl3_tcsetattr.htm
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kramed
RE: Get A User Inputted String Without Displaying It?
3 Aug, 2008 - 07:31 PM
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Actually Solaris. I took a look at the header you suggested and read the whole Terminal IO chapter in APUE2 but I am still not sure what I am looking for. Do I need to change a flag or is it much more complicated than that?
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kramed
RE: Get A User Inputted String Without Displaying It?
4 Aug, 2008 - 06:29 AM
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CODE
#include <sys/termios.h>

int echo_on()
{
    struct termios tt_struct;

    if (tcgetattr(0, &tt_struct) < 0)
        return -1;

    tt_struct.c_lflag |= ECHO;
    return tcsetattr(0, TCSANOW, &tt_struct);
}

int echo_off()
{
    struct termios tt_struct;

    if (tcgetattr(0, &tt_struct) < 0)
        return -1;

    tt_struct.c_lflag &= ~ECHO;
    return tcsetattr(0, TCSANOW, &tt_struct);
}
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