procexec/t_execve, procexec/envargs
procexec/t_execlp
procexec/t_execle
procexec/t_execl
procexec/closeonexec
procexec/t_system
procexec/m_simple_system
procexec/t_system
exercise 27-1
exercise 27-2
exercise 27-3
exercise 27-4
exercise 27-5
exercise 27-6
Merge branch 'section27' into develop
Merge branch 'develop'