/* echostate.c *   reports current state of echo bit in tty driver for fd 0 *   shows how to read attributes from driver and test a bit */#include        <stdio.h>#include        <termios.h>main(){        struct termios info;        int rv;        rv = tcgetattr( 0, &info );     /* read values from driver      */        if ( rv == -1 ){                perror( "tcgetattr");                exit(1);        }        if ( info.c_lflag & ECHO )                printf(" echo is on , since its bit is 1\n");        else                printf(" echo if OFF, since its bit is 0\n");}