runtime/exec_with_options.rb

tests/_examples/runtime/exec_with_options.rb in the metorex repository.

# Process.exec refuses what cannot start, and otherwise replaces this process
# with the command, run the way its options say.
begin
  Process.exec("")
rescue Errno::ENOENT => error
  p(error.class)
end
begin
  Process.exec(__dir__)
rescue Errno::EACCES => error
  p(error.class)
end
begin
  Process.exec("echo\0")
rescue ArgumentError => error
  p(error.message)
end
begin
  Process.exec(["/bin/sh"], "-c", "true")
rescue ArgumentError => error
  p(error.message)
end
$stdout.flush
environment = { "GREETING" => "from the environment" }
Process.exec(environment, ["/bin/sh", "named_shell"], "-c", 'echo "$0 $GREETING $(pwd)"', chdir: "/")
puts("not reached")

Output:

Errno::ENOENT
Errno::EACCES
"string contains null byte"
"wrong first argument"
named_shell from the environment /