62   int retcode;  in main()  local
73   retcode = pipe (pip);  in main()
75   if (retcode != 0)  in main()
77       fprintf (stderr, "Bad pipe %d\n", retcode);  in main()
102   while ((retcode = read (pip[0], buf, 1)) == 0)  in main()
105   if (retcode != 1)  in main()
107       fprintf (stderr, "Bad read 1: %d\n", retcode);  in main()
115   while ((retcode = read (pip[0], buf, 1)) == 0)  in main()
118   if (retcode != 1)  in main()
120       fprintf (stderr, "Bad read 2: %d\n", retcode);  in main()
132   retcode = waitpid (pid, &st, __WALL);  in main()
134   if (retcode != pid || !WIFEXITED (st))  in main()
136       fprintf (stderr, "Bad wait %d:%d %x\n", pid, retcode, st);  in main()