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package bindings_test
import (
"context"
"fmt"
"io/fs"
"os"
"os/exec"
"path/filepath"
"reflect"
"strconv"
"syscall"
"github.com/containers/podman/v4/pkg/bindings"
"github.com/containers/podman/v4/pkg/bindings/containers"
"github.com/containers/podman/v4/pkg/bindings/images"
"github.com/containers/podman/v4/pkg/bindings/pods"
"github.com/containers/podman/v4/pkg/bindings/system"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gexec"
)
var _ = Describe("Verify Podman resources", func() {
var (
bt *bindingTest
s *Session
)
BeforeEach(func() {
bt = newBindingTest()
s = bt.startAPIService()
err := bt.NewConnection()
Expect(err).ShouldNot(HaveOccurred())
})
AfterEach(func() {
s.Kill()
bt.cleanup()
})
It("no leaked connections", func() {
conn, err := bindings.NewConnection(context.Background(), bt.sock)
Expect(err).ShouldNot(HaveOccurred())
// Record details on open file descriptors before using API
buffer := lsof()
// Record open fd from /proc
start, err := readProc()
Expect(err).ShouldNot(HaveOccurred())
// Run some operations
_, err = system.Info(conn, nil)
Expect(err).ShouldNot(HaveOccurred())
_, err = images.List(conn, nil)
Expect(err).ShouldNot(HaveOccurred())
_, err = containers.List(conn, nil)
Expect(err).ShouldNot(HaveOccurred())
_, err = pods.List(conn, nil)
Expect(err).ShouldNot(HaveOccurred())
podman, _ := bindings.GetClient(conn)
podman.Client.CloseIdleConnections()
// Record open fd from /proc
finished, err := readProc()
Expect(err).ShouldNot(HaveOccurred())
if !reflect.DeepEqual(finished, start) {
fmt.Fprintf(GinkgoWriter, "Open FDs:\nlsof Before:\n%s\n", buffer)
// Record details on open file descriptors after using API
buffer := lsof()
fmt.Fprintf(GinkgoWriter, "lsof After:\n%s\n", buffer)
// We know test has failed. Easier to let ginkgo format output.
Expect(finished).Should(Equal(start))
}
})
})
func lsof() string {
lsof := exec.Command("lsof", "+E", "-p", strconv.Itoa(os.Getpid()))
buffer, err := lsof.Output()
Expect(err).ShouldNot(HaveOccurred())
return string(buffer)
}
func readProc() ([]string, error) {
syscall.Sync()
names := make([]string, 0)
err := filepath.WalkDir(fmt.Sprintf("/proc/%d/fd", os.Getpid()),
func(path string, d fs.DirEntry, err error) error {
name := path + " -> "
switch {
case d.IsDir():
return nil
case err != nil:
name += err.Error()
case d.Type()&fs.ModeSymlink != 0:
n, err := os.Readlink(path)
if err != nil && !os.IsNotExist(err) {
return err
}
if n == "" {
n = d.Type().String()
}
name += n
}
names = append(names, name)
return nil
})
return names, err
}
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