github.com/david-imola/snapd@v0.0.0-20210611180407-2de8ddeece6d/overlord/snapstate/backend/mountunit.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2014-2016 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package backend
    21  
    22  import (
    23  	"github.com/snapcore/snapd/dirs"
    24  	"github.com/snapcore/snapd/progress"
    25  	"github.com/snapcore/snapd/snap"
    26  	"github.com/snapcore/snapd/systemd"
    27  )
    28  
    29  func addMountUnit(s *snap.Info, preseed bool, meter progress.Meter) error {
    30  	squashfsPath := dirs.StripRootDir(s.MountFile())
    31  	whereDir := dirs.StripRootDir(s.MountDir())
    32  
    33  	var sysd systemd.Systemd
    34  	if preseed {
    35  		sysd = systemd.NewEmulationMode(dirs.GlobalRootDir)
    36  	} else {
    37  		sysd = systemd.New(systemd.SystemMode, meter)
    38  	}
    39  	_, err := sysd.AddMountUnitFile(s.InstanceName(), s.Revision.String(), squashfsPath, whereDir, "squashfs")
    40  	return err
    41  }
    42  
    43  func removeMountUnit(mountDir string, meter progress.Meter) error {
    44  	sysd := systemd.New(systemd.SystemMode, meter)
    45  	return sysd.RemoveMountUnitFile(mountDir)
    46  }