/usr/share/gocode/src/github.com/google/cups-connector/gcp-cups-connector/gcp-cups-connector.go is in google-cloud-print-connector 0.0~git20151105.24.1902938-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright 2015 Google Inc. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://developers.google.com/open-source/licenses/bsd
*/
package main
import (
"fmt"
"io"
"os"
"os/signal"
"syscall"
"time"
"github.com/codegangsta/cli"
"github.com/google/cups-connector/cups"
"github.com/google/cups-connector/gcp"
"github.com/google/cups-connector/lib"
"github.com/google/cups-connector/log"
"github.com/google/cups-connector/manager"
"github.com/google/cups-connector/monitor"
"github.com/google/cups-connector/privet"
"github.com/google/cups-connector/snmp"
"github.com/google/cups-connector/xmpp"
)
func main() {
app := cli.NewApp()
app.Name = "gcp-cups-connector"
app.Usage = "Google Cloud Print CUPS Connector"
app.Flags = []cli.Flag{
lib.ConfigFilenameFlag,
cli.BoolFlag{
Name: "log-to-console",
Usage: "Log to STDERR, in addition to log file",
},
}
app.Action = func(context *cli.Context) {
os.Exit(connector(context))
}
app.RunAndExitOnError()
}
func connector(context *cli.Context) int {
config, configFilename, err := lib.GetConfig(context)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to read config file: %s", err)
return 1
}
logFileMaxBytes := config.LogFileMaxMegabytes * 1024 * 1024
var logWriter io.Writer
logWriter, err = log.NewLogRoller(config.LogFileName, logFileMaxBytes, config.LogMaxFiles)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to start log roller: %s", err)
return 1
}
if context.Bool("log-to-console") {
logWriter = io.MultiWriter(logWriter, os.Stderr)
}
logLevel, ok := log.LevelFromString(config.LogLevel)
if !ok {
fmt.Fprintf(os.Stderr, "Log level %s is not recognized", config.LogLevel)
return 1
}
log.SetLevel(logLevel)
log.SetWriter(logWriter)
if configFilename == "" {
log.Info("No config file was found, so using defaults")
}
log.Error(lib.FullName)
fmt.Println(lib.FullName)
if !config.CloudPrintingEnable && !config.LocalPrintingEnable {
log.Error("Cannot run connector with both local_printing_enable and cloud_printing_enable set to false")
return 1
}
if _, err := os.Stat(config.MonitorSocketFilename); !os.IsNotExist(err) {
if err != nil {
log.Errorf("Failed to stat monitor socket: %s", err)
} else {
log.Errorf(
"A connector is already running, or the monitoring socket %s wasn't cleaned up properly",
config.MonitorSocketFilename)
}
return 1
}
jobs := make(chan *lib.Job, 10)
xmppNotifications := make(chan xmpp.PrinterNotification, 5)
var g *gcp.GoogleCloudPrint
var x *xmpp.XMPP
if config.CloudPrintingEnable {
xmppPingTimeout, err := time.ParseDuration(config.XMPPPingTimeout)
if err != nil {
log.Fatalf("Failed to parse xmpp ping timeout: %s", err)
return 1
}
xmppPingInterval, err := time.ParseDuration(config.XMPPPingInterval)
if err != nil {
log.Fatalf("Failed to parse xmpp ping interval default: %s", err)
return 1
}
g, err = gcp.NewGoogleCloudPrint(config.GCPBaseURL, config.RobotRefreshToken,
config.UserRefreshToken, config.ProxyName, config.GCPOAuthClientID,
config.GCPOAuthClientSecret, config.GCPOAuthAuthURL, config.GCPOAuthTokenURL,
config.GCPMaxConcurrentDownloads, jobs)
if err != nil {
log.Error(err)
return 1
}
x, err = xmpp.NewXMPP(config.XMPPJID, config.ProxyName, config.XMPPServer, config.XMPPPort,
xmppPingTimeout, xmppPingInterval, g.GetRobotAccessToken, xmppNotifications)
if err != nil {
log.Error(err)
return 1
}
defer x.Quit()
}
cupsConnectTimeout, err := time.ParseDuration(config.CUPSConnectTimeout)
if err != nil {
log.Fatalf("Failed to parse CUPS connect timeout: %s", err)
return 1
}
c, err := cups.NewCUPS(config.CopyPrinterInfoToDisplayName, config.PrefixJobIDToJobTitle,
config.DisplayNamePrefix, config.CUPSPrinterAttributes, config.CUPSMaxConnections,
cupsConnectTimeout)
if err != nil {
log.Fatal(err)
return 1
}
defer c.Quit()
var s *snmp.SNMPManager
if config.SNMPEnable {
log.Info("SNMP enabled")
s, err = snmp.NewSNMPManager(config.SNMPCommunity, config.SNMPMaxConnections)
if err != nil {
log.Error(err)
return 1
}
defer s.Quit()
}
var priv *privet.Privet
if config.LocalPrintingEnable {
if g == nil {
priv, err = privet.NewPrivet(jobs, config.GCPBaseURL, nil)
} else {
priv, err = privet.NewPrivet(jobs, config.GCPBaseURL, g.ProximityToken)
}
if err != nil {
log.Error(err)
return 1
}
defer priv.Quit()
}
cupsPrinterPollInterval, err := time.ParseDuration(config.CUPSPrinterPollInterval)
if err != nil {
log.Fatalf("Failed to parse CUPS printer poll interval: %s", err)
return 1
}
pm, err := manager.NewPrinterManager(c, g, priv, s, cupsPrinterPollInterval,
config.CUPSJobQueueSize, config.CUPSJobFullUsername, config.CUPSIgnoreRawPrinters,
config.ShareScope, jobs, xmppNotifications)
if err != nil {
log.Error(err)
return 1
}
defer pm.Quit()
m, err := monitor.NewMonitor(c, g, priv, pm, config.MonitorSocketFilename)
if err != nil {
log.Error(err)
return 1
}
defer m.Quit()
if config.CloudPrintingEnable {
if config.LocalPrintingEnable {
log.Errorf("Ready to rock as proxy '%s' and in local mode", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s' and in local mode\n", config.ProxyName)
} else {
log.Errorf("Ready to rock as proxy '%s'", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s'\n", config.ProxyName)
}
} else {
log.Error("Ready to rock in local-only mode")
fmt.Println("Ready to rock in local-only mode")
}
waitIndefinitely()
log.Error("Shutting down")
fmt.Println("")
fmt.Println("Shutting down")
return 0
}
// Blocks until Ctrl-C or SIGTERM.
func waitIndefinitely() {
ch := make(chan os.Signal)
signal.Notify(ch, os.Interrupt, syscall.SIGTERM)
<-ch
go func() {
// In case the process doesn't die quickly, wait for a second termination request.
<-ch
fmt.Println("Second termination request received")
os.Exit(1)
}()
}
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