Unix System Calls - exec() system calls (Cont’d)

exec() system calls (Cont’d)

􀁺 Letters added to the end of exec indicate the
type of arguments:
􀁺 l argn is specified as a list of arguments.
􀁺 v argv is specified as a vector (array of character
pointers).
􀁺 e environment is specified as an array of
character pointers.
􀁺 p user's PATH is searched for command, and
command can be a shell program