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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 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 cgroup_test
import (
"os"
"path/filepath"
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/sandbox/cgroup"
)
func (s *cgroupSuite) mockPidCgroup(c *C, text string) int {
f := filepath.Join(s.rootDir, "proc/333/cgroup")
c.Assert(os.MkdirAll(filepath.Dir(f), 0755), IsNil)
c.Assert(os.WriteFile(f, []byte(text), 0755), IsNil)
return 333
}
func (s *cgroupSuite) TestV1SnapNameFromPidHappy(c *C) {
restore := cgroup.MockVersion(cgroup.V1, nil)
defer restore()
pid := s.mockPidCgroup(c, string(mockCgroup)) // defined in cgroup_test.go
name, err := cgroup.SnapNameFromPid(pid)
c.Assert(err, IsNil)
c.Check(name, Equals, "hello-world")
}
func (s *cgroupSuite) TestV1SnapNameFromPidUnhappy(c *C) {
restore := cgroup.MockVersion(cgroup.V1, nil)
defer restore()
pid := s.mockPidCgroup(c, "1:freezer:/\n")
name, err := cgroup.SnapNameFromPid(pid)
c.Assert(err, ErrorMatches, "cannot find a snap for pid .*")
c.Check(name, Equals, "")
}
func (s *cgroupSuite) TestV1SnapNameFromPidEmptyName(c *C) {
restore := cgroup.MockVersion(cgroup.V1, nil)
defer restore()
pid := s.mockPidCgroup(c, "1:freezer:/snap./\n")
name, err := cgroup.SnapNameFromPid(pid)
c.Assert(err, ErrorMatches, "snap name in cgroup path is empty")
c.Check(name, Equals, "")
}
func (s *cgroupSuite) TestSnapNameFromPidTracking(c *C) {
restore := cgroup.MockVersion(cgroup.V1, nil)
defer restore()
pid := s.mockPidCgroup(c, "1:name=systemd:/user.slice/user-1000.slice/user@1000.service/apps.slice/snap.foo.bar.00000-1111-3333.service\n")
name, err := cgroup.SnapNameFromPid(pid)
c.Assert(err, IsNil)
c.Check(name, Equals, "foo")
}
func (s *cgroupSuite) TestSnapNameFromPidWithoutSources(c *C) {
restore := cgroup.MockVersion(cgroup.V2, nil)
defer restore()
pid := s.mockPidCgroup(c, "")
name, err := cgroup.SnapNameFromPid(pid)
c.Assert(err, ErrorMatches, "not supported")
c.Check(name, Equals, "")
}
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