/
main.go
451 lines (388 loc) · 12.3 KB
/
main.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package main
import (
"errors"
"fmt"
"io/ioutil"
"os"
"os/signal"
"runtime"
"runtime/debug"
"runtime/pprof"
"syscall"
"time"
"golang.org/x/net/context"
"github.com/keybase/client/go/client"
"github.com/keybase/client/go/externals"
"github.com/keybase/client/go/install"
"github.com/keybase/client/go/libcmdline"
"github.com/keybase/client/go/libkb"
"github.com/keybase/client/go/logger"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
"github.com/keybase/client/go/service"
"github.com/keybase/client/go/uidmap"
"github.com/keybase/go-framed-msgpack-rpc/rpc"
)
var cmd libcmdline.Command
var errParseArgs = errors.New("failed to parse command line arguments")
func handleQuickVersion() bool {
if len(os.Args) == 3 && os.Args[1] == "version" && os.Args[2] == "-S" {
fmt.Printf("%s\n", libkb.VersionString())
return true
}
return false
}
func keybaseExit(exitCode int) {
logger.RestoreConsoleMode()
os.Exit(exitCode)
}
func main() {
// Preserve non-critical errors that happen very early during
// startup, where logging is not set up yet, to be printed later
// when logging is functioning.
var startupErrors []error
if err := libkb.SaferDLLLoading(); err != nil {
// Don't abort here. This should not happen on any known
// version of Windows, but new MS platforms may create
// regressions.
startupErrors = append(startupErrors,
fmt.Errorf("SaferDLLLoading error: %v", err.Error()))
}
// handle a Quick version query
if handleQuickVersion() {
return
}
g := externals.NewGlobalContextInit()
go HandleSignals(g)
err := mainInner(g, startupErrors)
if g.Env.GetDebug() {
// hack to wait a little bit to receive all the log messages from the
// service before shutting down in debug mode.
time.Sleep(100 * time.Millisecond)
}
e2 := g.Shutdown()
if err == nil {
err = e2
}
if err != nil {
// if errParseArgs, the error was already output (along with usage)
if err != errParseArgs {
g.Log.Errorf("%s", stripFieldsFromAppStatusError(err).Error())
}
if g.ExitCode == keybase1.ExitCode_OK {
g.ExitCode = keybase1.ExitCode_NOTOK
}
}
if g.ExitCode != keybase1.ExitCode_OK {
keybaseExit(int(g.ExitCode))
}
}
func tryToDisableProcessTracing(log logger.Logger, e *libkb.Env) {
if e.GetRunMode() != libkb.ProductionRunMode || e.AllowPTrace() {
return
}
if !e.GetFeatureFlags().Admin() {
// Admin only for now
return
}
// We do our best but if it's not possible on some systems or
// configurations, it's not a fatal error. Also see documentation
// in ptrace_*.go files.
if err := libkb.DisableProcessTracing(); err != nil {
log.Debug("Unable to disable process tracing: %v", err.Error())
} else {
log.Debug("DisableProcessTracing call succeeded")
}
}
func logStartupIssues(errors []error, log logger.Logger) {
for _, err := range errors {
log.Warning(err.Error())
}
}
func warnNonProd(log logger.Logger, e *libkb.Env) {
mode := e.GetRunMode()
if mode != libkb.ProductionRunMode {
log.Warning("Running in %s mode", mode)
}
}
func checkSystemUser(log logger.Logger) {
if isAdminUser, match, _ := libkb.IsSystemAdminUser(); isAdminUser {
log.Errorf("Oops, you are trying to run as an admin user (%s). This isn't supported.", match)
keybaseExit(int(keybase1.ExitCode_NOTOK))
}
}
func mainInner(g *libkb.GlobalContext, startupErrors []error) error {
cl := libcmdline.NewCommandLine(true, client.GetExtraFlags())
cl.AddCommands(client.GetCommands(cl, g))
cl.AddCommands(service.GetCommands(cl, g))
cl.AddHelpTopics(client.GetHelpTopics())
var err error
cmd, err = cl.Parse(os.Args)
if err != nil {
g.Log.Errorf("Error parsing command line arguments: %s\n\n", err)
if _, isHelp := cmd.(*libcmdline.CmdSpecificHelp); isHelp {
// Parse returned the help command for this command, so run it:
cmd.Run()
}
return errParseArgs
}
if cmd == nil {
return nil
}
if !cmd.GetUsage().AllowRoot && !g.Env.GetAllowRoot() {
checkSystemUser(g.Log)
}
if cl.IsService() {
startProfile(g)
}
if !cl.IsService() {
if logger.SaveConsoleMode() == nil {
defer logger.RestoreConsoleMode()
}
client.InitUI(g)
}
if err = g.ConfigureCommand(cl, cmd); err != nil {
return err
}
g.StartupMessage()
warnNonProd(g.Log, g.Env)
logStartupIssues(startupErrors, g.Log)
tryToDisableProcessTracing(g.Log, g.Env)
if err := configOtherLibraries(g); err != nil {
return err
}
if err = configureProcesses(g, cl, &cmd); err != nil {
return err
}
err = cmd.Run()
if !cl.IsService() && !cl.SkipOutOfDateCheck() {
// Errors that come up in printing this warning are logged but ignored.
client.PrintOutOfDateWarnings(g)
}
return err
}
func configOtherLibraries(g *libkb.GlobalContext) error {
// Set our UID -> Username mapping service
g.SetUIDMapper(uidmap.NewUIDMap(g.Env.GetUIDMapFullNameCacheSize()))
return nil
}
// AutoFork? Standalone? ClientServer? Brew service? This function deals with the
// various run configurations that we can run in.
func configureProcesses(g *libkb.GlobalContext, cl *libcmdline.CommandLine, cmd *libcmdline.Command) (err error) {
g.Log.Debug("+ configureProcesses")
defer func() {
g.Log.Debug("- configureProcesses -> %v", err)
}()
// On Linux, the service configures its own autostart file. Otherwise, no
// need to configure if we're a service.
if cl.IsService() {
g.Log.Debug("| in configureProcesses, is service")
if runtime.GOOS == "linux" {
g.Log.Debug("| calling AutoInstall")
_, err := install.AutoInstall(g, "", false, 10*time.Second, g.Log)
if err != nil {
return err
}
}
return nil
}
// Start the server on the other end, possibly.
// There are two cases in which we do this: (1) we want
// a local loopback server in standalone mode; (2) we
// need to "autofork" it. Do at most one of these
// operations.
if g.Env.GetStandalone() {
if cl.IsNoStandalone() {
err = client.CantRunInStandaloneError{}
return err
}
svc := service.NewService(g, false /* isDaemon */)
err = svc.SetupCriticalSubServices()
if err != nil {
return err
}
err = svc.StartLoopbackServer()
if err != nil {
return err
}
// StandaloneChatConnector is an interface with only one
// method: StartStandaloneChat. This way we can pass Service
// object while not exposing anything but that one function.
g.StandaloneChatConnector = svc
g.Standalone = true
if pflerr, ok := err.(libkb.PIDFileLockError); ok {
err = fmt.Errorf("Can't run in standalone mode with a service running (see %q)",
pflerr.Filename)
return err
}
return err
}
// After this point, we need to provide a remote logging story if necessary
// If this command specifically asks not to be forked, then we are done in this
// function. This sort of thing is true for the `ctl` commands and also the `version`
// command.
fc := cl.GetForkCmd()
if fc == libcmdline.NoFork {
return configureLogging(g, cl)
}
var newProc bool
if libkb.IsBrewBuild {
// If we're running in Brew mode, we might need to install ourselves as a persistent
// service for future invocations of the command.
newProc, err = install.AutoInstall(g, "", false, 10*time.Second, g.Log)
if err != nil {
return err
}
} else {
// If this command warrants an autofork, do it now.
if fc == libcmdline.ForceFork || g.Env.GetAutoFork() {
newProc, err = client.AutoForkServer(g, cl)
if err != nil {
return err
}
}
}
// Restart the service if we see that it's out of date. It's important to do this
// before we make any RPCs to the service --- for instance, before the logging
// calls below. See the v1.0.8 update fiasco for more details. Also, only need
// to do this if we didn't just start a new process.
if !newProc {
if err = client.FixVersionClash(g, cl); err != nil {
return err
}
}
g.Log.Debug("| After forks; newProc=%v", newProc)
if err = configureLogging(g, cl); err != nil {
return err
}
// This sends the client's PATH to the service so the service can update
// its PATH if necessary. This is called after FixVersionClash(), which
// happens above in configureProcesses().
if err = configurePath(g, cl); err != nil {
// Further note -- don't die here. It could be we're calling this method
// against an earlier version of the service that doesn't support it.
// It's not critical that it succeed, so continue on.
g.Log.Debug("Configure path failed: %v", err)
}
return nil
}
func configureLogging(g *libkb.GlobalContext, cl *libcmdline.CommandLine) error {
g.Log.Debug("+ configureLogging")
defer func() {
g.Log.Debug("- configureLogging")
}()
// Whether or not we autoforked, we're now running in client-server
// mode (as opposed to standalone). Register a global LogUI so that
// calls to G.Log() in the daemon can be copied to us. This is
// something of a hack on the daemon side.
if !g.Env.GetDoLogForward() || cl.GetLogForward() == libcmdline.LogForwardNone {
g.Log.Debug("Disabling log forwarding")
return nil
}
protocols := []rpc.Protocol{client.NewLogUIProtocol(g)}
if err := client.RegisterProtocolsWithContext(protocols, g); err != nil {
return err
}
logLevel := keybase1.LogLevel_INFO
if g.Env.GetDebug() {
logLevel = keybase1.LogLevel_DEBUG
}
logClient, err := client.GetLogClient(g)
if err != nil {
return err
}
arg := keybase1.RegisterLoggerArg{
Name: "CLI client",
Level: logLevel,
}
if err := logClient.RegisterLogger(context.TODO(), arg); err != nil {
g.Log.Warning("Failed to register as a logger: %s", err)
}
return nil
}
// configurePath sends the client's PATH to the service.
func configurePath(g *libkb.GlobalContext, cl *libcmdline.CommandLine) error {
if cl.IsService() {
// this only runs on the client
return nil
}
return client.SendPath(g)
}
func HandleSignals(g *libkb.GlobalContext) {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM, os.Kill)
for {
s := <-c
if s != nil {
g.Log.Debug("trapped signal %v", s)
// if the current command has a Stop function, then call it.
// It will do its own stopping of the process and calling
// shutdown
if stop, ok := cmd.(client.Stopper); ok {
g.Log.Debug("Stopping command cleanly via stopper")
stop.Stop(keybase1.ExitCode_OK)
return
}
// if the current command has a Cancel function, then call it:
if canc, ok := cmd.(client.Canceler); ok {
g.Log.Debug("canceling running command")
if err := canc.Cancel(); err != nil {
g.Log.Warning("error canceling command: %s", err)
}
}
g.Log.Debug("calling shutdown")
g.Shutdown()
g.Log.Error("interrupted")
keybaseExit(3)
}
}
}
// stripFieldsFromAppStatusError is an error prettifier. By default, AppStatusErrors print optional
// fields that were problematic. But they make for pretty ugly error messages spit back to the user.
// So strip that out, but still leave in an error-code integer, since those are quite helpful.
func stripFieldsFromAppStatusError(e error) error {
if e == nil {
return e
}
if ase, ok := e.(libkb.AppStatusError); ok {
return fmt.Errorf("%s (code %d)", ase.Desc, ase.Code)
}
return e
}
func startProfile(g *libkb.GlobalContext) {
if os.Getenv("KEYBASE_PERIODIC_MEMPROFILE") == "" {
return
}
interval, err := time.ParseDuration(os.Getenv("KEYBASE_PERIODIC_MEMPROFILE"))
if err != nil {
g.Log.Debug("error parsing KEYBASE_PERIODIC_MEMPROFILE interval duration: %s", err)
return
}
go func() {
g.Log.Debug("periodic memory profile enabled, will dump memory profiles every %s", interval)
for {
time.Sleep(interval)
g.Log.Debug("dumping periodic memory profile")
f, err := ioutil.TempFile("", "keybase_memprofile")
if err != nil {
g.Log.Debug("could not create memory profile: ", err)
continue
}
debug.FreeOSMemory()
runtime.GC() // get up-to-date statistics
if err := pprof.WriteHeapProfile(f); err != nil {
g.Log.Debug("could not write memory profile: ", err)
continue
}
f.Close()
g.Log.Debug("wrote periodic memory profile to %s", f.Name())
var mems runtime.MemStats
runtime.ReadMemStats(&mems)
g.Log.Debug("runtime mem alloc: %v", mems.Alloc)
g.Log.Debug("runtime total alloc: %v", mems.TotalAlloc)
g.Log.Debug("runtime heap alloc: %v", mems.HeapAlloc)
g.Log.Debug("runtime heap sys: %v", mems.HeapSys)
}
}()
}