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package main
import (
"fmt"
"log/syslog"
"os"
"os/exec"
"runtime/pprof"
"sort"
"syscall"
"github.com/containers/libpod/libpod"
_ "github.com/containers/libpod/pkg/hooks/0.1.0"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/version"
"github.com/containers/storage/pkg/reexec"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
lsyslog "github.com/sirupsen/logrus/hooks/syslog"
"github.com/urfave/cli"
)
// This is populated by the Makefile from the VERSION file
// in the repository
var (
exitCode = 125
)
var cmdsNotRequiringRootless = map[string]bool{
"help": true,
"version": true,
"create": true,
"exec": true,
"export": true,
// `info` must be executed in an user namespace.
// If this change, please also update libpod.refreshRootless()
"login": true,
"logout": true,
"mount": true,
"kill": true,
"pause": true,
"restart": true,
"run": true,
"unpause": true,
"search": true,
"stats": true,
"stop": true,
"top": true,
}
type commandSorted []cli.Command
func (a commandSorted) Len() int { return len(a) }
func (a commandSorted) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
type commandSortedAlpha struct{ commandSorted }
func (a commandSortedAlpha) Less(i, j int) bool {
return a.commandSorted[i].Name < a.commandSorted[j].Name
}
type flagSorted []cli.Flag
func (a flagSorted) Len() int { return len(a) }
func (a flagSorted) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
type flagSortedAlpha struct{ flagSorted }
func (a flagSortedAlpha) Less(i, j int) bool {
return a.flagSorted[i].GetName() < a.flagSorted[j].GetName()
}
func main() {
debug := false
cpuProfile := false
if reexec.Init() {
return
}
app := cli.NewApp()
app.Name = "podman"
app.Usage = "manage pods and images"
app.OnUsageError = usageErrorHandler
app.CommandNotFound = commandNotFoundHandler
app.Version = version.Version
app.Commands = []cli.Command{
containerCommand,
exportCommand,
historyCommand,
imageCommand,
imagesCommand,
importCommand,
infoCommand,
inspectCommand,
pullCommand,
rmiCommand,
tagCommand,
versionCommand,
}
app.Commands = append(app.Commands, getAppCommands()...)
sort.Sort(commandSortedAlpha{app.Commands})
if varlinkCommand != nil {
app.Commands = append(app.Commands, *varlinkCommand)
}
app.Before = func(c *cli.Context) error {
if err := libpod.SetXdgRuntimeDir(""); err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
args := c.Args()
if args.Present() && rootless.IsRootless() {
if _, notRequireRootless := cmdsNotRequiringRootless[args.First()]; !notRequireRootless {
became, ret, err := rootless.BecomeRootInUserNS()
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
if became {
os.Exit(ret)
}
}
}
if c.GlobalBool("syslog") {
hook, err := lsyslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
if err == nil {
logrus.AddHook(hook)
}
}
logLevel := c.GlobalString("log-level")
if logLevel != "" {
level, err := logrus.ParseLevel(logLevel)
if err != nil {
return err
}
logrus.SetLevel(level)
}
rlimits := new(syscall.Rlimit)
rlimits.Cur = 1048576
rlimits.Max = 1048576
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
return errors.Wrapf(err, "error getting rlimits")
}
rlimits.Cur = rlimits.Max
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
return errors.Wrapf(err, "error setting new rlimits")
}
}
if rootless.IsRootless() {
logrus.Info("running as rootless")
}
// Be sure we can create directories with 0755 mode.
syscall.Umask(0022)
if logLevel == "debug" {
debug = true
}
if c.GlobalIsSet("cpu-profile") {
f, err := os.Create(c.GlobalString("cpu-profile"))
if err != nil {
return errors.Wrapf(err, "unable to create cpu profiling file %s",
c.GlobalString("cpu-profile"))
}
cpuProfile = true
pprof.StartCPUProfile(f)
}
return nil
}
app.After = func(*cli.Context) error {
// called by Run() when the command handler succeeds
if cpuProfile {
pprof.StopCPUProfile()
}
return nil
}
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "config, c",
Usage: "path of a libpod config file detailing container server configuration options",
Hidden: true,
},
cli.StringFlag{
Name: "cpu-profile",
Usage: "path for the cpu profiling results",
},
cli.StringFlag{
Name: "log-level",
Usage: "log messages above specified level: debug, info, warn, error (default), fatal or panic",
Value: "error",
},
cli.StringFlag{
Name: "tmpdir",
Usage: "path to the tmp directory",
},
}
app.Flags = append(app.Flags, getMainAppFlags()...)
sort.Sort(flagSortedAlpha{app.Flags})
// Check if /etc/containers/registries.conf exists when running in
// in a local environment.
CheckForRegistries()
if err := app.Run(os.Args); err != nil {
if debug {
logrus.Errorf(err.Error())
} else {
// Retrieve the exit error from the exec call, if it exists
if ee, ok := err.(*exec.ExitError); ok {
if status, ok := ee.Sys().(syscall.WaitStatus); ok {
exitCode = status.ExitStatus()
}
}
fmt.Fprintln(os.Stderr, err.Error())
}
} else {
// The exitCode modified from 125, indicates an application
// running inside of a container failed, as opposed to the
// podman command failed. Must exit with that exit code
// otherwise command exited correctly.
if exitCode == 125 {
exitCode = 0
}
}
os.Exit(exitCode)
}
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