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package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/pkg/rootless"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var runDescription = "Runs a command in a new container from the given image"
var runFlags []cli.Flag = append(createFlags, cli.BoolTFlag{
Name: "sig-proxy",
Usage: "Proxy received signals to the process (default true)",
})
var runCommand = cli.Command{
Name: "run",
Usage: "Run a command in a new container",
Description: runDescription,
Flags: sortFlags(runFlags),
Action: runCmd,
ArgsUsage: "IMAGE [COMMAND [ARG...]]",
HideHelp: true,
SkipArgReorder: true,
UseShortOptionHandling: true,
OnUsageError: usageErrorHandler,
}
func runCmd(c *cli.Context) error {
if err := createInit(c); err != nil {
return err
}
if os.Geteuid() != 0 {
rootless.SetSkipStorageSetup(true)
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
ctr, createConfig, err := createContainer(c, runtime)
if err != nil {
return err
}
if logrus.GetLevel() == logrus.DebugLevel {
cgroupPath, err := ctr.CGroupPath()
if err == nil {
logrus.Debugf("container %q has CgroupParent %q", ctr.ID(), cgroupPath)
}
}
ctx := getContext()
// Handle detached start
if createConfig.Detach {
if err := ctr.Start(ctx); err != nil {
// This means the command did not exist
exitCode = 127
if strings.Index(err.Error(), "permission denied") > -1 {
exitCode = 126
}
return err
}
fmt.Printf("%s\n", ctr.ID())
exitCode = 0
return nil
}
outputStream := os.Stdout
errorStream := os.Stderr
inputStream := os.Stdin
// If -i is not set, clear stdin
if !c.Bool("interactive") {
inputStream = nil
}
// If attach is set, clear stdin/stdout/stderr and only attach requested
if c.IsSet("attach") || c.IsSet("a") {
outputStream = nil
errorStream = nil
if !c.Bool("interactive") {
inputStream = nil
}
attachTo := c.StringSlice("attach")
for _, stream := range attachTo {
switch strings.ToLower(stream) {
case "stdout":
outputStream = os.Stdout
case "stderr":
errorStream = os.Stderr
case "stdin":
inputStream = os.Stdin
default:
return errors.Wrapf(libpod.ErrInvalidArg, "invalid stream %q for --attach - must be one of stdin, stdout, or stderr", stream)
}
}
}
if err := startAttachCtr(ctr, outputStream, errorStream, inputStream, c.String("detach-keys"), c.BoolT("sig-proxy"), true); err != nil {
// This means the command did not exist
exitCode = 127
if strings.Index(err.Error(), "permission denied") > -1 {
exitCode = 126
}
if c.IsSet("rm") {
if deleteError := runtime.RemoveContainer(ctx, ctr, true); deleteError != nil {
logrus.Errorf("unable to remove container %s after failing to start and attach to it", ctr.ID())
}
}
return err
}
if ecode, err := ctr.Wait(); err != nil {
if errors.Cause(err) == libpod.ErrNoSuchCtr {
// The container may have been removed
// Go looking for an exit file
ctrExitCode, err := readExitFile(runtime.GetConfig().TmpDir, ctr.ID())
if err != nil {
logrus.Errorf("Cannot get exit code: %v", err)
exitCode = 127
} else {
exitCode = ctrExitCode
}
}
} else {
exitCode = int(ecode)
}
if createConfig.Rm {
return runtime.RemoveContainer(ctx, ctr, true)
}
if err := ctr.Cleanup(ctx); err != nil {
// If the container has been removed already, no need to error on cleanup
// Also, if it was restarted, don't error either
if errors.Cause(err) == libpod.ErrNoSuchCtr ||
errors.Cause(err) == libpod.ErrCtrRemoved ||
errors.Cause(err) == libpod.ErrCtrStateInvalid {
return nil
}
return err
}
return nil
}
// Read a container's exit file
func readExitFile(runtimeTmp, ctrID string) (int, error) {
exitFile := filepath.Join(runtimeTmp, "exits", ctrID)
logrus.Debugf("Attempting to read container %s exit code from file %s", ctrID, exitFile)
// Check if it exists
if _, err := os.Stat(exitFile); err != nil {
return 0, errors.Wrapf(err, "error getting exit file for container %s", ctrID)
}
// File exists, read it in and convert to int
statusStr, err := ioutil.ReadFile(exitFile)
if err != nil {
return 0, errors.Wrapf(err, "error reading exit file for container %s", ctrID)
}
exitCode, err := strconv.Atoi(string(statusStr))
if err != nil {
return 0, errors.Wrapf(err, "error parsing exit code for container %s", ctrID)
}
return exitCode, nil
}
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