#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); }