exercises/ex04/trout/trout.c
void sig_alrm (int signo)
{
  Write (pipefd[1], "", 1);  /* write 1 null byte to pipe */
  return;
}
/* sig_alrm: alarm handler sends a message to the process through
   a pipe, causing select to return */
alarm handler sends a message to the process through
a pipe, causing select to return
alarm handler sends a message to the process through a pipe causing select to return
void sig_alrm (int signo)
{
  Write (pipefd[1], "", 1);  
  return;
}
void sig_alrm ( int signo ) { Write ( pipefd [ 1 ] , " " , 1 ) ; return ; }
sig_alrm: alarm handler sends a message to the process through
a pipe, causing select to return
sig_alrm : alarm handler sends a message to the process through a pipe causing select to return
/* write 1 null byte to pipe */