Copy standard input to standard output

# include “ourhdr.h”

# define BUFFSIZE 8192

int

main(void)

{

int n;

char buf[BUFFSIZE];

while ( (n=read(STDIN_FILENO, buf, BUFFSIZE) ) > 0)

if(write (STDOUT_FILENO, buf, n) !=n)

err_sys(“write error”);

if(n<0)

err_sys(“read error”);

exit(0);

}