it compiles into a shared object (.so) that is dynamically linked into
any 6.out that imports the first two files.

The stanza

	// #include <gmp.h>
	import "C"

is a signal to cgo.  The doc comment on the import of "C" provides
additional context for the C file.  Here it is just a single #include
but it could contain arbitrary C definitions to be imported and used.

package main

import (
	"context"
	"os"
	"os/signal"
	"syscall"

	"istio.io/istio/cni/pkg/cmd"
	"istio.io/istio/pkg/log"
)

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
		sig := <-sigChan

	responses <-chan Response
	cancel    context.CancelCauseFunc

	// Requests sent to the server.
	// If the handler is defined with 0 incoming capacity this will be nil.
	// Channel *must* be closed to signal the end of the stream.
	// If the request context is canceled, the stream will no longer process requests.
	// Requests sent cannot be used any further by the called.
	Requests chan<- []byte

	muxID uint64

		return false
	}
	if podHasSidecar(pod) {
		// Ztunnel and sidecar for a single pod is currently not supported; opt out.
		return false
	}
	// TODO: delete this block when there is a way for users to signal the intent to exclude
	// a pod from ambient that does not require the use of this annotation
	if pod.Annotations[constants.AmbientRedirection] == constants.AmbientRedirectionDisabled {

	// the CNI binary installed.
	if err := installer.Run(ctx); err != nil {
		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
			// Error was caused by interrupt/termination signal
			t.Logf("installer complete: %v", err)
		} else {
			t.Errorf("installer failed: %v", err)
		}
	}

	if cleanErr := installer.Cleanup(); cleanErr != nil {

			cniClient := newCNIClient(conf.CNIEventAddress, constants.CNIAddEventPath)
			if err = PushCNIEvent(cniClient, args, prevResult.IPs, podName, podNamespace); err != nil {
				log.Errorf("istio-cni cmdAdd failed to signal node Istio CNI agent: %s", err)
				return err
			}
			return nil
		}
		log.Debugf("istio-cni ambient cmdAdd podName: %s - not ambient enabled, ignoring", podName)
	}
	// End ambient plugin logic

		if b[0]&0x40 != 0 {
			inv = 0xff
		}

		var x uint64
		for i, c := range b {
			c ^= inv // Inverts c only if inv is 0xff, otherwise does nothing
			if i == 0 {
				c &= 0x7f // Ignore signal bit in first byte
			}
			if (x >> 56) > 0 {
				p.err = ErrHeader // Integer overflow
				return 0
			}
			x = x<<8 | uint64(c)
		}
		if (x >> 63) > 0 {
			p.err = ErrHeader // Integer overflow

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"context"
	"encoding/hex"
	"errors"
	"fmt"
	"io"
	"log"
	"math/rand"
	"net"
	"os"
	"os/signal"
	"runtime"
	"strings"
	"syscall"
	"time"

	"github.com/coreos/go-systemd/v22/daemon"
	"github.com/dustin/go-humanize"
	"github.com/minio/cli"
	"github.com/minio/madmin-go/v3"

	peerRESTUserTemp       = "user-temp"
	peerRESTPolicy         = "policy"
	peerRESTUserOrGroup    = "user-or-group"
	peerRESTUserType       = "user-type"
	peerRESTIsGroup        = "is-group"
	peerRESTSignal         = "signal"
	peerRESTSubSys         = "sub-sys"
	peerRESTProfiler       = "profiler"
	peerRESTSize           = "size"
	peerRESTConcurrent     = "concurrent"
	peerRESTDuration       = "duration"

			exit(stopProcess())
		case osSignal := <-globalOSSignalCh:
			logger.Info("Exiting on signal: %s", strings.ToUpper(osSignal.String()))
			daemon.SdNotify(false, daemon.SdNotifyStopping)
			exit(stopProcess())
		case signal := <-globalServiceSignalCh:
			switch signal {
			case serviceRestart:
				logger.Info("Restarting on service signal")
				daemon.SdNotify(false, daemon.SdNotifyReloading)
				stop := stopProcess()