errors returned by syscall are not user-friendly, should not be shipped raw to the user

[John Lenton]

code like thise:

  if err := syscall.Setgroups([]int{gid}); err != nil {
   return err
  }

  if err := syscall.Setgid(gid); err != nil {
   return err
  }
  if err := syscall.Setuid(uid); err != nil {
   return err
  }

needs to wrap all those errors with a more helpful explanation of what we were doing when the error occurred.

[Michael Terry (mterry)]

This situation got better with https://code.launchpad.net/~chipaca/snappy/muppets/+merge/261376

Arguably fixed?

[Launchpad Janitor (janitor)]

[Expired for Snappy 15.04 because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for Snappy because there has been no activity for 60 days.]