CS 3733 Operating Systems

Reading: Section 2.6, 2.7, 2.8 and 2.9 of PUP

• The wait and waitpid system calls
  • Prototype
  • Return status
  • Look at Program 2.5 and Exercise 2.3.
  • Waiting for a particular child rather than any child (Example 2.10).
  • Zombies.

• The exec system call
  • Different forms of exec
  • Argument arrays.
  • Look at Program 2.8.
  • What happens when the call to makeargv is moved before the fork?
  • Attributes that preserved after exec.

• Background processes and daemons

• The process environment

• Process termination and exit status

SKILL: Understand process termination and consequences of wait