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libsyncthi
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libsyncthi
Author | SHA1 | Date |
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Martchus | 4bd99f9039 |
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#include "c_bindings.h"
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libst_logging_callback_function_t libst_logging_callback_function = NULL;
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void libst_invoke_logging_callback(int log_level, const char *message, size_t message_size)
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{
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if (!libst_logging_callback_function) {
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return;
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}
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libst_logging_callback_function(log_level, message, message_size);
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}
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package main
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import (
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"context"
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"fmt"
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"os"
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"unsafe"
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"path/filepath"
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_ "net/http/pprof" // Need to import this to support STPROFILER.
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"github.com/syncthing/syncthing/lib/build"
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"github.com/syncthing/syncthing/lib/config"
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"github.com/syncthing/syncthing/lib/events"
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"github.com/syncthing/syncthing/lib/fs"
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"github.com/syncthing/syncthing/lib/logger"
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"github.com/syncthing/syncthing/lib/locations"
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"github.com/syncthing/syncthing/lib/protocol"
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"github.com/syncthing/syncthing/lib/svcutil"
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"github.com/syncthing/syncthing/lib/syncthing"
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"github.com/syncthing/syncthing/cmd/syncthing/cli"
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"github.com/thejerf/suture/v4"
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)
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// include header for required C helper functions (so the following comment is NO comment)
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// #include "c_bindings.h"
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import "C"
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var theApp *syncthing.App
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var myID protocol.DeviceID
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var cliArgs []string
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const (
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tlsDefaultCommonName = "syncthing"
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)
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//export libst_own_device_id
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func libst_own_device_id() string {
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return myID.String()
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}
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//export libst_init_logging
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func libst_init_logging() {
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l.AddHandler(logger.LevelVerbose, func(level logger.LogLevel, msg string) {
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runes := []byte(msg)
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length := len(runes)
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if length <= 0 {
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return
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}
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C.libst_invoke_logging_callback(C.int(level), (*C.char)(unsafe.Pointer(&runes[0])), C.size_t(len(runes)))
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})
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}
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//export libst_clear_cli_args
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func libst_clear_cli_args() {
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cliArgs = []string{"syncthing", "cli"}
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}
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//export libst_append_cli_arg
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func libst_append_cli_arg(arg string) {
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cliArgs = append(cliArgs, arg)
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}
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//export libst_run_cli
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func libst_run_cli() int {
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if err := cli.RunWithArgs(cliArgs); err != nil {
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fmt.Println(err)
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return 1
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}
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return 0
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}
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// C&P from main.go; used to ensure that the config directory exists
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func ensureDir(dir string, mode fs.FileMode) error {
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fs := fs.NewFilesystem(fs.FilesystemTypeBasic, dir)
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err := fs.MkdirAll(".", mode)
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if err != nil {
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return err
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}
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if fi, err := fs.Stat("."); err == nil {
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// Apprently the stat may fail even though the mkdirall passed. If it
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// does, we'll just assume things are in order and let other things
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// fail (like loading or creating the config...).
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currentMode := fi.Mode() & 0777
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if currentMode != mode {
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err := fs.Chmod(".", mode)
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// This can fail on crappy filesystems, nothing we can do about it.
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if err != nil {
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l.Warnln(err)
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}
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}
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}
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return nil
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}
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//export libst_run_syncthing
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func libst_run_syncthing(configDir string, dataDir string, guiAddress string, guiApiKey string, verbose bool, allowNewerConfig bool, noDefaultConfig bool, skipPortProbing bool, ensureConfigDirExists bool, ensureDataDirExists bool) int {
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// return if already running (for simplicity we only allow one Syncthing instance at at time for now)
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if theApp != nil {
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return 0
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}
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// set specified GUI address and API key
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if guiAddress != "" {
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os.Setenv("STGUIADDRESS", guiAddress)
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}
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if guiApiKey != "" {
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os.Setenv("STGUIAPIKEY", guiApiKey)
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}
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// set specified config dir
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if configDir != "" {
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if !filepath.IsAbs(configDir) {
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var err error
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configDir, err = filepath.Abs(configDir)
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if err != nil {
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l.Warnln("Failed to make config path absolute:", err)
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return 3
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}
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}
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if err := locations.SetBaseDir(locations.ConfigBaseDir, configDir); err != nil {
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l.Warnln(err)
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return 3
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}
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}
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// set specified database dir
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if dataDir != "" {
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if !filepath.IsAbs(dataDir) {
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var err error
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dataDir, err = filepath.Abs(dataDir)
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if err != nil {
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l.Warnln("Failed to make database path absolute:", err)
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return 3
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}
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}
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if err := locations.SetBaseDir(locations.DataBaseDir, dataDir); err != nil {
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l.Warnln(err)
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return 3
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}
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}
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// ensure that the config directory exists
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if ensureConfigDirExists {
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if err := ensureDir(locations.GetBaseDir(locations.ConfigBaseDir), 0700); err != nil {
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l.Warnln("Failed to create config directory:", err)
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return 4
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}
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}
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// ensure that the database directory exists
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if dataDir != "" && ensureDataDirExists {
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if err := ensureDir(locations.GetBaseDir(locations.DataBaseDir), 0700); err != nil {
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l.Warnln("Failed to create database directory:", err)
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return 4
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}
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}
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// ensure that we have a certificate and key
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cert, certErr := syncthing.LoadOrGenerateCertificate(
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locations.Get(locations.CertFile),
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locations.Get(locations.KeyFile),
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)
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if certErr != nil {
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l.Warnln("Failed to load/generate certificate:", certErr)
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return 1
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}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// earlyService is a supervisor that runs the services needed for or
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// before app startup; the event logger, and the config service.
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spec := svcutil.SpecWithDebugLogger(l)
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earlyService := suture.New("early", spec)
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earlyService.ServeBackground(ctx)
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evLogger := events.NewLogger()
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earlyService.Add(evLogger)
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// load config
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configLocation := locations.Get(locations.ConfigFile)
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l.Infoln("Loading config from:", configLocation)
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cfgWrapper, cfgErr := syncthing.LoadConfigAtStartup(configLocation, cert, evLogger, allowNewerConfig, noDefaultConfig, skipPortProbing)
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if cfgErr != nil {
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l.Warnln("Failed to initialize config:", cfgErr)
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return 2
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}
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if cfgService, ok := cfgWrapper.(suture.Service); ok {
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earlyService.Add(cfgService)
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}
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// open database
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dbFile := locations.Get(locations.Database)
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l.Infoln("Opening database from:", dbFile)
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ldb, dbErr := syncthing.OpenDBBackend(dbFile, config.TuningAuto)
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if dbErr != nil {
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l.Warnln("Error opening database:", dbErr)
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return 4
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}
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appOpts := syncthing.Options{
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ProfilerAddr: os.Getenv("STPROFILER"),
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NoUpgrade: true,
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Verbose: verbose,
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}
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var err error
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theApp, err = syncthing.New(cfgWrapper, ldb, evLogger, cert, appOpts)
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if err != nil {
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l.Warnln("Failed to start Syncthing:", err)
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return svcutil.ExitError.AsInt()
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}
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// start Syncthing and block until it has finished
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returnCode := 0
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if err := theApp.Start(); err != nil {
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returnCode = svcutil.ExitError.AsInt()
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}
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returnCode = theApp.Wait().AsInt();
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theApp = nil
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return returnCode
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}
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//export libst_stop_syncthing
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func libst_stop_syncthing() int {
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if theApp != nil {
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return int(theApp.Stop(svcutil.ExitSuccess))
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} else {
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return 0;
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}
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}
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//export libst_reset_database
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func libst_reset_database() {
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os.RemoveAll(locations.Get(locations.Database))
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}
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//export libst_syncthing_version
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func libst_syncthing_version() *C.char {
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return C.CString(build.Version)
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}
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//export libst_long_syncthing_version
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func libst_long_syncthing_version() *C.char {
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return C.CString(build.LongVersion)
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}
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func main() {
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// prevent "runtime.main_main·f: function main is undeclared in the main package"
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}
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@ -0,0 +1,11 @@
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#ifndef LIBSYNCTHING_INTERNAL_H
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#define LIBSYNCTHING_INTERNAL_H
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#include <stddef.h>
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// allow registration of callback function
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typedef void (*libst_logging_callback_function_t) (int logLevel, const char *msg, size_t msgSize);
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extern libst_logging_callback_function_t libst_logging_callback_function;
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extern void libst_invoke_logging_callback(int log_level, const char *message, size_t message_size);
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#endif // LIBSYNCTHING_INTERNAL_H
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@ -0,0 +1 @@
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../cmd/syncthing/debug.go
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