fds               308 usertests.c      int fds[2], pid;
fds               311 usertests.c      if(pipe(fds) != 0){
fds               318 usertests.c        close(fds[0]);
fds               322 usertests.c          if(write(fds[1], buf, 1033) != 1033){
fds               329 usertests.c        close(fds[1]);
fds               332 usertests.c        while((n = read(fds[0], buf, cc)) > 0){
fds               348 usertests.c        close(fds[0]);
fds              1417 usertests.c      int fds[2], pid, pids[10], ppid;
fds              1514 usertests.c      if(pipe(fds) != 0){
fds              1522 usertests.c          write(fds[1], "x", 1);
fds              1527 usertests.c          read(fds[0], &scratch, 1);