?? echostate.c
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/* 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");}
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