
- Use the saved errno to print the error message if the vfork() fails. - In the child, if the execl() fails, use warn()/_exit(), not err(), as the latter is not safe in the presence of a Real vfork().
- Use the saved errno to print the error message if the vfork() fails. - In the child, if the execl() fails, use warn()/_exit(), not err(), as the latter is not safe in the presence of a Real vfork().