open_null_as      365 src/core/execute.c                 return open_null_as(O_RDONLY, STDIN_FILENO);
open_null_as      443 src/core/execute.c                 return open_null_as(O_WRONLY, fileno);
open_null_as      449 src/core/execute.c                 return open_null_as(O_WRONLY, fileno);
open_null_as      472 src/core/execute.c                         r = open_null_as(O_WRONLY, fileno);