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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 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 syscheck_test
import (
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/osutil/squashfs"
"github.com/snapcore/snapd/sandbox/selinux"
"github.com/snapcore/snapd/syscheck"
"github.com/snapcore/snapd/testutil"
)
func (s *syscheckSuite) TestCheckSquashfsMountHappy(c *C) {
restore := squashfs.MockNeedsFuse(false)
defer restore()
// we create a canary.txt with the same prefix as the real one
mockMount := testutil.MockCommand(c, "mount", `echo 'This file is used to check that snapd can read a squashfs image.' > "$4"/canary.txt`)
defer mockMount.Restore()
mockUmount := testutil.MockCommand(c, "umount", "")
defer mockUmount.Restore()
err := syscheck.CheckSquashfsMount()
c.Check(err, IsNil)
c.Check(mockMount.Calls(), HasLen, 1)
c.Check(mockUmount.Calls(), HasLen, 1)
squashfsFile := mockMount.Calls()[0][3]
mountPoint := mockMount.Calls()[0][4]
c.Check(mockMount.Calls(), DeepEquals, [][]string{
{"mount", "-t", "squashfs", squashfsFile, mountPoint},
})
c.Check(mockUmount.Calls(), DeepEquals, [][]string{
{"umount", "-l", mountPoint},
})
}
func (s *syscheckSuite) TestCheckSquashfsMountNotHappy(c *C) {
restore := squashfs.MockNeedsFuse(false)
defer restore()
mockMount := testutil.MockCommand(c, "mount", "echo iz-broken;false")
defer mockMount.Restore()
mockUmount := testutil.MockCommand(c, "umount", "")
defer mockUmount.Restore()
err := syscheck.CheckSquashfsMount()
c.Check(err, ErrorMatches, "cannot mount squashfs image using.*")
c.Check(mockMount.Calls(), HasLen, 1)
c.Check(mockUmount.Calls(), HasLen, 0)
squashfsFile := mockMount.Calls()[0][3]
mountPoint := mockMount.Calls()[0][4]
c.Check(mockMount.Calls(), DeepEquals, [][]string{
{"mount", "-t", "squashfs", squashfsFile, mountPoint},
})
}
func (s *syscheckSuite) TestCheckSquashfsMountWrongContent(c *C) {
restore := squashfs.MockNeedsFuse(false)
defer restore()
mockMount := testutil.MockCommand(c, "mount", `echo 'wrong content' > "$4"/canary.txt`)
defer mockMount.Restore()
mockUmount := testutil.MockCommand(c, "umount", "")
defer mockUmount.Restore()
err := syscheck.CheckSquashfsMount()
c.Check(err, ErrorMatches, `unexpected squashfs canary content: "wrong content\\n"`)
c.Check(mockMount.Calls(), HasLen, 1)
c.Check(mockUmount.Calls(), HasLen, 1)
}
func (s *syscheckSuite) TestCheckSquashfsMountSELinuxContext(c *C) {
restore := squashfs.MockNeedsFuse(false)
defer restore()
mockMount := testutil.MockCommand(c, "mount", "echo 'mock ran'")
defer mockMount.Restore()
mockUmount := testutil.MockCommand(c, "umount", "")
defer mockUmount.Restore()
mockSELinux := selinux.MockIsEnabled(func() (bool, error) { return true, nil })
defer mockSELinux()
err := syscheck.CheckSquashfsMount()
c.Assert(err, ErrorMatches, `squashfs mount returned no err but canary file cannot be read`)
c.Check(mockMount.Calls(), HasLen, 1)
c.Check(mockUmount.Calls(), HasLen, 1)
squashfsFile := mockMount.Calls()[0][5]
mountPoint := mockMount.Calls()[0][6]
c.Check(mockMount.Calls(), DeepEquals, [][]string{
{"mount", "-t", "squashfs", "-o", "context=system_u:object_r:snappy_snap_t:s0", squashfsFile, mountPoint},
})
}
func (s *syscheckSuite) TestCheckFuseNoFuseHappy(c *C) {
restore := squashfs.MockNeedsFuse(false)
defer restore()
c.Assert(syscheck.CheckFuse(), IsNil)
}
func (s *syscheckSuite) TestCheckFuseNeedsFuseAndHasFuse(c *C) {
restore := squashfs.MockNeedsFuse(true)
defer restore()
restore = syscheck.MockFuseBinary("true")
defer restore()
c.Assert(syscheck.CheckFuse(), IsNil)
}
func (s *syscheckSuite) TestCheckFuseNoDevFuseUnhappy(c *C) {
restore := squashfs.MockNeedsFuse(true)
defer restore()
restore = syscheck.MockFuseBinary("/it/does/not/exist")
defer restore()
c.Assert(syscheck.CheckFuse(), ErrorMatches, `The "fuse" filesystem is required on this system but not available. Please try to install the fuse package.`)
}
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