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package system
import (
"errors"
"fmt"
"os"
"slices"
"hakurei.app/system/acl"
)
// UpdatePerm appends an ephemeral acl update Op.
func (sys *I) UpdatePerm(path string, perms ...acl.Perm) *I {
sys.UpdatePermType(Process, path, perms...)
return sys
}
// UpdatePermType appends an acl update Op.
func (sys *I) UpdatePermType(et Enablement, path string, perms ...acl.Perm) *I {
sys.lock.Lock()
defer sys.lock.Unlock()
sys.ops = append(sys.ops, &ACL{et, path, perms})
return sys
}
type ACL struct {
et Enablement
path string
perms acl.Perms
}
func (a *ACL) Type() Enablement { return a.et }
func (a *ACL) apply(sys *I) error {
msg.Verbose("applying ACL", a)
return wrapErrSuffix(acl.Update(a.path, sys.uid, a.perms...),
fmt.Sprintf("cannot apply ACL entry to %q:", a.path))
}
func (a *ACL) revert(sys *I, ec *Criteria) error {
if ec.hasType(a) {
msg.Verbose("stripping ACL", a)
err := acl.Update(a.path, sys.uid)
if errors.Is(err, os.ErrNotExist) {
// the ACL is effectively stripped if the file no longer exists
msg.Verbosef("target of ACL %s no longer exists", a)
err = nil
}
return wrapErrSuffix(err,
fmt.Sprintf("cannot strip ACL entry from %q:", a.path))
} else {
msg.Verbose("skipping ACL", a)
return nil
}
}
func (a *ACL) Is(o Op) bool {
a0, ok := o.(*ACL)
return ok && a0 != nil &&
a.et == a0.et &&
a.path == a0.path &&
slices.Equal(a.perms, a0.perms)
}
func (a *ACL) Path() string { return a.path }
func (a *ACL) String() string {
return fmt.Sprintf("%s type: %s path: %q",
a.perms, TypeString(a.et), a.path)
}
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