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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
import (
"strings"
)
const cameraSummary = `allows access to all cameras`
const cameraBaseDeclarationSlots = `
camera:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const cameraConnectedPlugAppArmor = `
# Until we have proper device assignment, allow access to all cameras
###PROMPT### /dev/video[0-9]* rwk,
# VideoCore cameras (shared device with VideoCore/EGL)
###PROMPT### /dev/vchiq rw,
# Allow detection of cameras. Leaks plugged in USB device info
/sys/bus/usb/devices/ r,
/sys/devices/pci**/usb*/**/busnum r,
/sys/devices/pci**/usb*/**/devnum r,
/sys/devices/pci**/usb*/**/idVendor r,
/sys/devices/pci**/usb*/**/idProduct r,
/sys/devices/pci**/usb*/**/interface r,
/sys/devices/pci**/usb*/**/modalias r,
/sys/devices/pci**/usb*/**/speed r,
/run/udev/data/c81:[0-9]* r, # video4linux (/dev/video*, etc)
/run/udev/data/+usb:* r,
/sys/class/video4linux/ r,
/sys/devices/pci**/usb*/**/video4linux/** r,
/sys/devices/platform/**/usb*/**/video4linux/** r,
`
// DetectCameraFromPath returns true if the given path corresponds to an
// AppArmor rule with the prompt prefix from the camera interface.
//
// XXX: this is only necessary until metadata tags are fully supported by the
// AppArmor parser and kernel. Then, this function should be removed.
func DetectCameraFromPath(path string) bool {
if strings.HasPrefix(path, "/dev/video") || path == "/dev/vchiq" {
return true
}
return false
}
var cameraConnectedPlugUDev = []string{
`KERNEL=="video[0-9]*"`,
`KERNEL=="vchiq"`,
}
func init() {
registerIface(&commonInterface{
name: "camera",
summary: cameraSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationSlots: cameraBaseDeclarationSlots,
connectedPlugAppArmor: cameraConnectedPlugAppArmor,
connectedPlugUDev: cameraConnectedPlugUDev,
})
}
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