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package system
import (
"errors"
"fmt"
"os"
"git.ophivana.moe/security/fortify/acl"
"git.ophivana.moe/security/fortify/internal/fmsg"
"git.ophivana.moe/security/fortify/wl"
)
// Wayland sets up a wayland socket with a security context attached.
func (sys *I) Wayland(dst, src, appID, instanceID string) *I {
sys.lock.Lock()
defer sys.lock.Unlock()
sys.ops = append(sys.ops, Wayland{[2]string{dst, src}, new(wl.Conn), appID, instanceID})
return sys
}
type Wayland struct {
pair [2]string
conn *wl.Conn
appID, instanceID string
}
func (w Wayland) Type() Enablement {
return Process
}
func (w Wayland) apply(sys *I) error {
// the Wayland op is not repeatable
if sys.sp != nil {
return errors.New("attempted to attach multiple wayland sockets")
}
if err := w.conn.Attach(w.pair[1]); err != nil {
return fmsg.WrapErrorSuffix(err,
fmt.Sprintf("cannot attach to wayland on %q:", w.pair[1]))
} else {
fmsg.VPrintf("wayland attached on %q", w.pair[1])
}
if sp, err := w.conn.Bind(w.pair[0], w.appID, w.instanceID); err != nil {
return fmsg.WrapErrorSuffix(err,
fmt.Sprintf("cannot bind to socket on %q:", w.pair[0]))
} else {
sys.sp = sp
fmsg.VPrintf("wayland listening on %q", w.pair[0])
return fmsg.WrapErrorSuffix(errors.Join(os.Chmod(w.pair[0], 0), acl.UpdatePerm(w.pair[0], sys.uid, acl.Read, acl.Write, acl.Execute)),
fmt.Sprintf("cannot chmod socket on %q:", w.pair[0]))
}
}
func (w Wayland) revert(_ *I, ec *Criteria) error {
if ec.hasType(w) {
fmsg.VPrintf("removing wayland socket on %q", w.pair[0])
if err := os.Remove(w.pair[0]); err != nil && !errors.Is(err, os.ErrNotExist) {
return err
}
fmsg.VPrintf("detaching from wayland on %q", w.pair[1])
return fmsg.WrapErrorSuffix(w.conn.Close(),
fmt.Sprintf("cannot detach from wayland on %q:", w.pair[1]))
} else {
fmsg.VPrintf("skipping wayland cleanup on %q", w.pair[0])
return nil
}
}
func (w Wayland) Is(o Op) bool {
w0, ok := o.(Wayland)
return ok && w.pair == w0.pair
}
func (w Wayland) Path() string {
return w.pair[0]
}
func (w Wayland) String() string {
return fmt.Sprintf("wayland socket at %q", w.pair[0])
}
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