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#include <err.h>
#include <fcntl.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>
int
main()
{
int c, n, o, t;
struct termios orig, term;
t = 0;
if((o = open("/var/tmp/r.in", O_RDWR)) == -1)
err(1, "/var/tmp/r.in");
/* Enter "raw" terminal mode. */
tcgetattr(t, &orig);
tcgetattr(t, &term);
term.c_lflag &= ~(ICANON|ECHO|ISIG);
tcsetattr(t, TCSANOW, &term);
while((n = read(t, &c, 1)) > 0){
if(c == 26) /* ^Z */
break;
if(c != '\n')
write(t, &c, 1);
write(o, &c, 1);
}
/* Restore original terminal mode. */
tcsetattr(t, TCSANOW, &orig);
}
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