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package app
import (
"fmt"
"syscall"
"hakurei.app/container"
"hakurei.app/hst"
)
// spAccountOp sets up user account emulation inside the container.
type spAccountOp struct {
// Inner directory to use as the home directory of the emulated user.
Home *container.Absolute
// String matching the default NAME_REGEX value from adduser to use as the username of the emulated user.
Username string
// Pathname of shell to use for the emulated user.
Shell *container.Absolute
}
func (s *spAccountOp) toSystem(*outcomeStateSys, *hst.Config) error {
const fallbackUsername = "chronos"
// do checks here to fail before fork/exec
if s.Home == nil || s.Shell == nil {
// unreachable
return syscall.ENOTRECOVERABLE
}
if s.Username == "" {
s.Username = fallbackUsername
} else if !isValidUsername(s.Username) {
return newWithMessage(fmt.Sprintf("invalid user name %q", s.Username))
}
return nil
}
func (s *spAccountOp) toContainer(state *outcomeStateParams) error {
state.params.Dir = s.Home
state.env["HOME"] = s.Home.String()
state.env["USER"] = s.Username
state.env["SHELL"] = s.Shell.String()
state.params.
Place(container.AbsFHSEtc.Append("passwd"),
[]byte(s.Username+":x:"+
state.mapuid.String()+":"+
state.mapgid.String()+
":Hakurei:"+
s.Home.String()+":"+
s.Shell.String()+"\n")).
Place(container.AbsFHSEtc.Append("group"),
[]byte("hakurei:x:"+state.mapgid.String()+":\n"))
return nil
}
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