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package container
import (
"encoding/gob"
"fmt"
"os"
. "syscall"
)
func init() { gob.Register(new(MountProcOp)) }
// Proc appends an [Op] that mounts a private instance of proc.
func (f *Ops) Proc(target *Absolute) *Ops {
*f = append(*f, &MountProcOp{target})
return f
}
// MountProcOp mounts a new instance of [FstypeProc] on container path Target.
type MountProcOp struct {
Target *Absolute
}
func (p *MountProcOp) early(*setupState) error { return nil }
func (p *MountProcOp) apply(state *setupState) error {
if p.Target == nil {
return EBADE
}
target := toSysroot(p.Target.String())
if err := os.MkdirAll(target, state.ParentPerm); err != nil {
return wrapErrSelf(err)
}
return wrapErrSuffix(Mount(SourceProc, target, FstypeProc, MS_NOSUID|MS_NOEXEC|MS_NODEV, zeroString),
fmt.Sprintf("cannot mount proc on %q:", p.Target.String()))
}
func (p *MountProcOp) Is(op Op) bool {
vp, ok := op.(*MountProcOp)
return ok && ((p == nil && vp == nil) ||
(p.Target != nil && vp.Target != nil && p.Target.Is(vp.Target)))
}
func (*MountProcOp) prefix() string { return "mounting" }
func (p *MountProcOp) String() string { return fmt.Sprintf("proc on %q", p.Target) }
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