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package integration
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"syscall"
"time"
"github.com/containers/podman/v3/pkg/rootless"
. "github.com/containers/podman/v3/test/utils"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gexec"
"golang.org/x/sys/unix"
)
const sigCatch = "trap \"echo FOO >> /h/fifo \" 8; echo READY >> /h/fifo; while :; do sleep 0.25; done"
const sigCatch2 = "trap \"echo Received\" SIGFPE; while :; do sleep 0.25; done"
var _ = Describe("Podman run with --sig-proxy", func() {
var (
tmpdir string
err error
podmanTest *PodmanTestIntegration
)
BeforeEach(func() {
tmpdir, err = CreateTempDirInTempDir()
if err != nil {
os.Exit(1)
}
podmanTest = PodmanTestCreate(tmpdir)
podmanTest.Setup()
podmanTest.SeedImages()
})
AfterEach(func() {
podmanTest.Cleanup()
f := CurrentGinkgoTestDescription()
processTestResult(f)
})
Specify("signals are forwarded to container using sig-proxy", func() {
SkipIfRemote("FIXME: This looks like it is supposed to work in remote")
if podmanTest.Host.Arch == "ppc64le" {
Skip("Doesn't work on ppc64le")
}
signal := syscall.SIGFPE
// Set up a socket for communication
udsDir := filepath.Join(tmpdir, "socket")
os.Mkdir(udsDir, 0700)
udsPath := filepath.Join(udsDir, "fifo")
syscall.Mkfifo(udsPath, 0600)
if rootless.IsRootless() {
podmanTest.RestoreArtifact(fedoraMinimal)
}
_, pid := podmanTest.PodmanPID([]string{"run", "-it", "-v", fmt.Sprintf("%s:/h:Z", udsDir), fedoraMinimal, "bash", "-c", sigCatch})
uds, _ := os.OpenFile(udsPath, os.O_RDONLY|syscall.O_NONBLOCK, 0600)
defer uds.Close()
// Wait for the script in the container to alert us that it is READY
counter := 0
for {
buf := make([]byte, 1024)
n, err := uds.Read(buf[:])
if err != nil && err != io.EOF {
fmt.Println(err)
return
}
data := string(buf[0:n])
if strings.Contains(data, "READY") {
break
}
time.Sleep(1 * time.Second)
if counter == 15 {
Fail("Timed out waiting for READY from container")
}
counter++
}
// Ok, container is up and running now and so is the script
if err := unix.Kill(pid, signal); err != nil {
Fail(fmt.Sprintf("error killing podman process %d: %v", pid, err))
}
// The sending of the signal above will send FOO to the socket; here we
// listen to the socket for that.
counter = 0
for {
buf := make([]byte, 1024)
n, err := uds.Read(buf[:])
if err != nil {
fmt.Println(err)
return
}
data := string(buf[0:n])
if strings.Contains(data, "FOO") {
break
}
time.Sleep(1 * time.Second)
if counter == 15 {
Fail("timed out waiting for FOO from container")
}
counter++
}
})
Specify("signals are not forwarded to container with sig-proxy false", func() {
SkipIfRemote("FIXME: This looks like it is supposed to work in remote")
signal := syscall.SIGFPE
if rootless.IsRootless() {
podmanTest.RestoreArtifact(fedoraMinimal)
}
session, pid := podmanTest.PodmanPID([]string{"run", "--name", "test2", "--sig-proxy=false", fedoraMinimal, "bash", "-c", sigCatch2})
ok := WaitForContainer(podmanTest)
Expect(ok).To(BeTrue())
// Kill with given signal
// Should be no output, SIGPOLL is usually ignored
if err := unix.Kill(pid, signal); err != nil {
Fail(fmt.Sprintf("error killing podman process %d: %v", pid, err))
}
// Kill with -9 to guarantee the container dies
killSession := podmanTest.Podman([]string{"kill", "-s", "9", "test2"})
killSession.WaitWithDefaultTimeout()
Expect(killSession).Should(Exit(0))
session.WaitWithDefaultTimeout()
Expect(session).To(ExitWithError())
ok, _ = session.GrepString("Received")
Expect(ok).To(BeFalse())
})
})
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