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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 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 osutil_test
import (
"bytes"
"fmt"
"io"
"os"
"os/exec"
"syscall"
"time"
. "gopkg.in/check.v1"
"gopkg.in/tomb.v2"
"github.com/snapcore/snapd/dirs"
"github.com/snapcore/snapd/osutil"
)
type execSuite struct{}
var _ = Suite(&execSuite{})
func (s *execSuite) SetUpTest(c *C) {
dirs.SetRootDir(c.MkDir())
}
func (s *execSuite) TearDownTest(c *C) {
dirs.SetRootDir("")
}
func (s *execSuite) TestRunAndWaitRunsAndWaits(c *C) {
buf, err := osutil.RunAndWait([]string{"sh", "-c", "echo hello; sleep .1"}, nil, time.Second, &tomb.Tomb{})
c.Assert(err, IsNil)
c.Check(string(buf), Equals, "hello\n")
}
func (s *execSuite) TestRunAndWaitRunsSetsEnviron(c *C) {
buf, err := osutil.RunAndWait([]string{"sh", "-c", "echo $FOO"}, []string{"FOO=42"}, time.Second, &tomb.Tomb{})
c.Assert(err, IsNil)
c.Check(string(buf), Equals, "42\n")
}
func (s *execSuite) TestRunAndWaitRunsAndKillsOnTimeout(c *C) {
buf, err := osutil.RunAndWait([]string{"sleep", "1s"}, nil, time.Millisecond, &tomb.Tomb{})
c.Check(err, ErrorMatches, "exceeded maximum runtime.*")
c.Check(string(buf), Matches, "(?s).*exceeded maximum runtime.*")
}
func (s *execSuite) TestRunAndWaitRunsAndKillsOnAbort(c *C) {
tmb := &tomb.Tomb{}
go func() {
time.Sleep(10 * time.Millisecond)
tmb.Kill(nil)
}()
buf, err := osutil.RunAndWait([]string{"sleep", "1s"}, nil, time.Second, tmb)
c.Check(err, ErrorMatches, "aborted.*")
c.Check(string(buf), Matches, "(?s).*aborted.*")
}
func (s *execSuite) TestRunAndWaitKillImpatient(c *C) {
defer osutil.MockSyscallKill(func(int, syscall.Signal) error { return nil })()
defer osutil.MockCmdWaitTimeout(time.Millisecond)()
buf, err := osutil.RunAndWait([]string{"sleep", "1s"}, nil, time.Millisecond, &tomb.Tomb{})
c.Check(err, ErrorMatches, ".* did not stop")
c.Check(string(buf), Equals, "")
}
func (s *execSuite) TestRunAndWaitExposesKillallError(c *C) {
defer osutil.MockSyscallKill(func(p int, s syscall.Signal) error {
syscall.Kill(p, s)
return fmt.Errorf("xyzzy")
})()
defer osutil.MockCmdWaitTimeout(time.Millisecond)()
_, err := osutil.RunAndWait([]string{"sleep", "1s"}, nil, time.Millisecond, &tomb.Tomb{})
c.Check(err, ErrorMatches, "cannot abort: xyzzy")
}
func (s *execSuite) TestKillProcessGroupKillsProcessGroup(c *C) {
pid := 0
ppid := 0
defer osutil.MockSyscallGetpgid(func(p int) (int, error) {
ppid = p
return syscall.Getpgid(p)
})()
defer osutil.MockSyscallKill(func(p int, s syscall.Signal) error {
pid = p
return syscall.Kill(p, s)
})()
cmd := exec.Command("sleep", "1m")
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
cmd.Start()
defer cmd.Process.Kill()
err := osutil.KillProcessGroup(cmd)
c.Assert(err, IsNil)
// process groups are passed to kill as negative numbers
c.Check(pid, Equals, -ppid)
}
func (s *execSuite) TestKillProcessGroupShyOfInit(c *C) {
defer osutil.MockSyscallGetpgid(func(int) (int, error) { return 1, nil })()
cmd := exec.Command("sleep", "1m")
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
cmd.Start()
defer cmd.Process.Kill()
err := osutil.KillProcessGroup(cmd)
c.Assert(err, ErrorMatches, "cannot kill pgid 1")
}
func (s *execSuite) TestStreamCommandHappy(c *C) {
var buf bytes.Buffer
stdout, err := osutil.StreamCommand("sh", "-c", "echo hello; sleep .1; echo bye")
c.Assert(err, IsNil)
_, err = io.Copy(&buf, stdout)
c.Assert(err, IsNil)
c.Check(buf.String(), Equals, "hello\nbye\n")
wrf, wrc := osutil.WaitingReaderGuts(stdout)
c.Assert(wrf, FitsTypeOf, &os.File{})
// Depending on golang version the error is one of the two.
c.Check(wrf.(*os.File).Close(), ErrorMatches, "invalid argument|file already closed")
c.Check(wrc.ProcessState, NotNil) // i.e. already waited for
}
func (s *execSuite) TestStreamCommandSad(c *C) {
var buf bytes.Buffer
stdout, err := osutil.StreamCommand("false")
c.Assert(err, IsNil)
_, err = io.Copy(&buf, stdout)
c.Assert(err, ErrorMatches, "exit status 1")
c.Check(buf.String(), Equals, "")
wrf, wrc := osutil.WaitingReaderGuts(stdout)
c.Assert(wrf, FitsTypeOf, &os.File{})
// Depending on golang version the error is one of the two.
c.Check(wrf.(*os.File).Close(), ErrorMatches, "invalid argument|file already closed")
c.Check(wrc.ProcessState, NotNil) // i.e. already waited for
}
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