// @(#)root/proof:$Name: $:$Id: TProofServ.cxx,v 1.28 2002/08/09 13:12:24 rdm Exp $
// Author: Fons Rademakers 16/02/97
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
//////////////////////////////////////////////////////////////////////////
// //
// TProofServ //
// //
// TProofServ is the PROOF server. It can act either as the master //
// server or as a slave server, depending on its startup arguments. It //
// receives and handles message coming from the client or from the //
// master server. //
// //
//////////////////////////////////////////////////////////////////////////
#ifdef WIN32
#include <io.h>
typedef long off_t;
#endif
#include <errno.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#if (defined(__FreeBSD__) && (__FreeBSD__ < 4)) || defined(__APPLE__)
#include <sys/file.h>
#define lockf(fd, op, sz) flock((fd), (op))
#define F_LOCK (LOCK_EX | LOCK_NB)
#define F_ULOCK LOCK_UN
#endif
#include "TProofServ.h"
#include "TProofLimitsFinder.h"
#include "TProof.h"
#include "TROOT.h"
#include "TFile.h"
#include "TSysEvtHandler.h"
#include "TAuthenticate.h"
#include "TSystem.h"
#include "TInterpreter.h"
#include "TException.h"
#include "TSocket.h"
#include "TStopwatch.h"
#include "TMessage.h"
#include "TUrl.h"
#include "TEnv.h"
#include "TError.h"
#include "TTree.h"
#include "TProofPlayer.h"
#include "TDSetProxy.h"
#include "TTimeStamp.h"
#include "TProofDebug.h"
#ifndef R__WIN32
const char* const kCP = "/bin/cp -f";
const char* const kRM = "/bin/rm -rf";
const char* const kLS = "/bin/ls -l";
const char* const kUNTAR = "/bin/zcat %s/%s | (cd %s; tar xf -)";
#else
const char* const kCP = "copy";
const char* const kRM = "delete";
const char* const kLS = "dir";
const char* const kUNTAR = "...";
#endif
TProofServ *gProofServ;
//______________________________________________________________________________
static void ProofServErrorHandler(int level, Bool_t abort, const char *location,
const char *msg)
{
// The PROOF error handler function. It prints the message on stderr and
// if abort is set it aborts the application.
if (!gProofServ)
return;
if (level < gErrorIgnoreLevel)
return;
const char *type = 0;
ELogLevel loglevel = kLogInfo;
if (level >= kInfo) {
loglevel = kLogInfo;
type = "Info";
}
if (level >= kWarning) {
loglevel = kLogWarning;
type = "Warning";
}
if (level >= kError) {
loglevel = kLogErr;
type = "Error";
}
if (level >= kSysError) {
loglevel = kLogErr;
type = "SysError";
}
if (level >= kFatal) {
loglevel = kLogErr;
type = "Fatal";
}
TString node = gProofServ->IsMaster() ? "master" : "slave ";
if (node != "master") node += gProofServ->GetOrdinal();
char *bp;
if (!location || strlen(location) == 0) {
fprintf(stderr, "%s on %s: %sn", type, node.Data(), msg);
bp = Form("%s:%s:%s:%s", gProofServ->GetUser(), node.Data(), type, msg);
} else {
fprintf(stderr, "%s in <%s> on %s: %sn", type, location, node.Data(), msg);
bp = Form("%s:%s:%s:<%s>:%s", gProofServ->GetUser(), node.Data(), type, location, msg);
}
fflush(stderr);
gSystem->Syslog(loglevel, bp);
if (abort) {
static Bool_t recursive = kFALSE;
if (!recursive) {
recursive = kTRUE;
gProofServ->GetSocket()->Send(kPROOF_FATAL);
recursive = kFALSE;
}
fprintf(stderr, "abortingn");
fflush(stderr);
gSystem->StackTrace();
gSystem->Abort();
}
}
//----- Interrupt signal handler -----------------------------------------------
//______________________________________________________________________________
class TProofServInterruptHandler : public TSignalHandler {
TProofServ *fServ;
public:
TProofServInterruptHandler(TProofServ *s)
: TSignalHandler(kSigUrgent, kFALSE) { fServ = s; }
Bool_t Notify();
};
//______________________________________________________________________________
Bool_t TProofServInterruptHandler::Notify()
{
fServ->HandleUrgentData();
if (TROOT::Initialized()) {
Throw(GetSignal());
}
return kTRUE;
}
//----- SigPipe signal handler -------------------------------------------------
//______________________________________________________________________________
class TProofServSigPipeHandler : public TSignalHandler {
TProofServ *fServ;
public:
TProofServSigPipeHandler(TProofServ *s) : TSignalHandler(kSigPipe, kFALSE)
{ fServ = s; }
Bool_t Notify();
};
//______________________________________________________________________________
Bool_t TProofServSigPipeHandler::Notify()
{
fServ->HandleSigPipe();
return kTRUE;
}
//----- Input handler for messages from parent or master -----------------------
//______________________________________________________________________________
class TProofServInputHandler : public TFileHandler {
TProofServ *fServ;
public:
TProofServInputHandler(TProofServ *s, Int_t fd) : TFileHandler(fd, 1)
{ fServ = s; }
Bool_t Notify();
Bool_t ReadNotify() { return Notify(); }
};
//______________________________________________________________________________
Bool_t TProofServInputHandler::Notify()
{
fServ->HandleSocketInput();
return kTRUE;
}
ClassImp(TProofServ)
//______________________________________________________________________________
TProofServ::TProofServ(int *argc, char **argv)
: TApplication("proofserv", argc, argv, 0, -1)
{
// Create an application environment. The TProofServ environment provides
// an eventloop via inheritance of TApplication.
// debug hook
#ifdef R__DEBUG
int debug = 1;
while (debug)
;
#endif
// make sure all registered dictionaries have been initialized
gInterpreter->InitializeDictionaries();
// abort on kSysError's or higher and set error handler
gErrorAbortLevel = kSysError;
SetErrorHandler(ProofServErrorHandler);
fNcmd = 0;
fInterrupt = kFALSE;
fProtocol = 0;
fOrdinal = -1;
fGroupId = -1;
fGroupSize = 0;
fLogLevel = 1;
fRealTime = 0.0;
fCpuTime = 0.0;
fProof = 0;
fSocket = new TSocket(0);
GetOptions(argc, argv);
// debug hooks
if (IsMaster()) {
#ifdef R__MASTERDEBUG
int debug = 1;
while (debug)
;
#endif
} else {
#ifdef R__SLAVEDEBUG
int debug = 1;
while (debug)
;
#endif
}
Setup();
RedirectOutput();
// Send message of the day to the client
if (IsMaster()) {
if (CatMotd() == -1) {
SendLogFile(-99);
Terminate(0);
}
} else {
THLimitsFinder::SetLimitsFinder(new TProofLimitsFinder);
}
// Everybody expects iostream to be available, so load it...
#ifndef WIN32
ProcessLine("#include <iostream>");
#endif
// Load user functions
const char *logon;
logon = gEnv->GetValue("Proof.Load", (char*)0);
if (logon && !gSystem->AccessPathName(logon, kReadPermission))
ProcessLine(Form(".L %s",logon));
// Execute logon macro
logon = gEnv->GetValue("Proof.Logon", (char*)0);
if (logon && !NoLogOpt() && !gSystem->AccessPathName(logon, kReadPermission))
ProcessFile(logon);
gInterpreter->SaveContext();
gInterpreter->SaveGlobalsContext();
// Install interrupt and message input handlers
gSystem->AddSignalHandler(new TProofServInterruptHandler(this));
gSystem->AddFileHandler(new TProofServInputHandler(this, 0));
gProofServ = this;
// if master, start slave servers
if (IsMaster()) {
TAuthenticate::SetGlobalUser(fUser);
TAuthenticate::SetGlobalPasswd(fPasswd);
TString master = "proof://__master__";
TInetAddress a = gSystem->GetSockName(0);
if (a.IsValid()) {
master += ":";
master += a.GetPort();
}
fProof = new TProof(master, fConfFile, fConfDir, fLogLevel);
SendLogFile();
}
}
//______________________________________________________________________________
TProofServ::~TProofServ()
{
// Cleanup. Not really necessary since after this dtor there is no
// live anyway.
delete fSocket;
}
//______________________________________________________________________________
Int_t TProofServ::CatMotd()
{
// Print message of the day (in fConfDir/proof/etc/motd). The motd
// is not shown more than once a dat. If the file fConfDir/proof/etc/noproof
// exists, show its contents and close the connection.
TString motdname;
TString lastname;
FILE *motd;
Bool_t show = kFALSE;
motdname = fConfDir + "/proof/etc/noproof";
if ((motd = fopen(motdname, "r"))) {
int c;
printf("n");
while ((c = getc(motd)) != EOF)
putchar(c);
fclose(motd);
printf("n");
return -1;
}
// get last modification time of the file ~/proof/.prooflast
lastname = TString(kPROOF_WorkDir) + "/.prooflast";
char *last = gSystem->ExpandPathName(lastname.Data());
Long_t id, size, flags, modtime, lasttime;
if (gSystem->GetPathInfo(last, &id, &size, &flags, &lasttime) == 1)
lasttime = 0;
// show motd at least once per day
if (time(0) - lasttime > (time_t)86400)
show = kTRUE;
motdname = fConfDir + "/proof/etc/motd";
if (gSystem->GetPathInfo(motdname, &id, &size, &flags, &modtime) == 0) {
if (modtime > lasttime || show) {
if ((motd = fopen(motdname, "r"))) {
int c;
printf("n");
while ((c = getc(motd)) != EOF)
putchar(c);
fclose(motd);
printf("n");
}
}
}
int fd = creat(last, 0600);
close(fd);
delete [] last;
return 0;
}
//______________________________________________________________________________
TObject *TProofServ::Get(const char *namecycle)
{
// Get object with name "name;cycle" (e.g. "aap;2") from master or client.
// This method is called by TDirectory::Get() in case the object can not
// be found locally.
fSocket->Send(namecycle, kPROOF_GETOBJECT);
TMessage *mess;
if (fSocket->Recv(mess) < 0)
return 0;
TObject *idcur = 0;
if (mess->What() == kMESS_OBJECT)
idcur = mess->ReadObject(mess->GetClass());
delete mess;
return idcur;
}
//______________________________________________________________________________
void TProofServ::GetLimits(Int_t dim, Int_t nentries, Int_t *nbins, Double_t *vmin, Double_t *vmax)
{
// Get limits of histogram from master. This method is called by
// TTree::TakeEstimate().
TMessage mess(kPROOF_LIMITS);
mess << dim << nentries << nbins[0] << vmin[0] << vmax[0];
if (dim == 2)
mess << nbins[1] << vmin[1] << vmax[1];
if (dim == 3)
mess << nbins[2] << vmin[2] << vmax[2];
fSocket->Send(mess);
TMessage *answ;
if (fSocket->Recv(answ) != -1) {
(*answ) >> nbins[0] >> vmin[0] >> vmax[0];
if (dim == 2)
(*answ) >> nbins[1] >> vmin[1] >> vmax[1];
if (dim == 3)
(*answ) >> nbins[2] >> vmin[2] >> vmax[2];
delete answ;
}
}
//______________________________________________________________________________
TDSetElement *TProofServ::GetNextPacket()
{
// Get next range of entries to be processed on this server.
fSocket->Send(kPROOF_GETPACKET);
TMessage *mess;
if (fSocket->Recv(mess) < 0)
return 0;
Bool_t ok;
TDSetElement *e;
TString file;
TString dir;
TString obj;
Long64_t first;
Long64_t num;
(*mess) >> ok;
if (ok) {
(*mess) >> file >> dir >> obj >> first >> num;
e = new TDSetElement(0, file, obj, dir, first, num);
} else {
e = 0;
}
if (e != 0) {
PDB(kLoop,2) Info("GetNextPacket", "'%s' '%s' '%s' %d %d", e->GetFileName(),
e->GetDirectory(), e->GetObjName(),e->GetFirst(),e->GetNum());
} else {
PDB(kLoop,2) Info("GetNextPacket", "Done");
}
return e;
}
//______________________________________________________________________________
void TProofServ::GetOptions(int *argc, char **argv)
{
// Get and handle command line options. Fixed format:
// "proofserv"|"proofslave" <confdir>
if (!strcmp(argv[1], "proofserv") || !strcmp(argv[1], "proofslave")) {
fService = argv[1];
fMasterServ = kTRUE;
if (!strcmp(argv[1], "proofslave")) fMasterServ = kFALSE;
}
fConfDir = argv[2];
}
//______________________________________________________________________________
void TProofServ::HandleSocketInput()
{
// Handle input coming from the client or from the master server.
static TStopwatch timer;
TMessage *mess;
char str[2048];
Int_t what;
if (fSocket->Recv(mess) <= 0)
Terminate(0); // do something more intelligent here
what = mess->What();
timer.Start();
fNcmd++;
switch (what) {
case kMESS_CINT:
mess->ReadString(str, sizeof(str));
if (IsMaster() && IsParallel()) {
fProof->SendCommand(str);
} else {
PDB(kGlobal,1) Info("HandleSocketInput:kMESS_CINT", "processing: %s...", str);
ProcessLine(str);
}
SendLogFile();
break;
case kMESS_STRING:
mess->ReadString(str, sizeof(str));
break;
case kMESS_OBJECT:
mess->ReadObject(mess->GetClass());
break;
case kPROOF_GROUPVIEW:
mess->ReadString(str, sizeof(str));
sscanf(str, "%d %d", &fGroupId, &fGroupSize);
break;
case kPROOF_LOGLEVEL:
mess->ReadString(str, sizeof(str));
sscanf(str, "%d", &fLogLevel);
if (IsMaster())
fProof->SetLogLevel(fLogLevel);
break;
case kPROOF_PING:
if (IsMaster())
fProof->Ping();
// do nothing (ping is already acknowledged)
break;
case kPROOF_PRINT:
Print();
SendLogFile();
break;
case kPROOF_RESET:
mess->ReadString(str, sizeof(str));
Reset(str);
break;
case kPROOF_STATUS:
SendStatus();
break;
case kPROOF_STOP:
Terminate(0);
break;
case kPROOF_TREEDRAW:
mess->ReadString(str, sizeof(str));
{
Int_t maxv, est;
char name[64];
sscanf(str, "%s %d %d", name, &maxv, &est);
TTree *t = (TTree*)gDirectory->Get(name);
if (t) {
t->SetMaxVirtualSize(maxv);
t->SetEstimate(est);
}
}
break;
case kPROOF_PROCESS:
{
TDSet *dset;
TString filename;
TList *input;
Long64_t nentries, first;
PDB(kGlobal,1) Info("HandleSocketInput:kPROOF_PROCESS", "Enter");
(*mess) >> dset >> filename >> input >> nentries >> first;
TProofPlayer *p;
if (IsMaster()) {
p = new TProofPlayerRemote(fProof);
} else {
p = new TProofPlayerSlave(fSocket);
}
if (dset->IsA() == TDSetProxy::Class()) {
((TDSetProxy*)dset)->SetProofServ(this);
}
TIter next(input);
for (TObject *obj; (obj = next()); ) {
PDB(kGlobal,2) Info("HandleSocketInput:kPROOF_PROCESS", "Adding: %s", obj->GetName());
p->AddInput(obj);
}
delete input;
p->Process(dset, filename, nentries, first);
// return output!
PDB(kGlobal,2) Info("HandleSocketInput:kPROOF_PROCESS","Send Output");
fSocket->SendObject(p->GetOutputList(), kPROOF_OUTPUTLIST);
PDB(kGlobal,2) Info("HandleSocketInput:kPROOF_PROCESS","Send LogFile");
SendLogFile();
delete dset;
delete p;
PDB(kGlobal,1) Info("HandleSocketInput:kPROOF_PROCESS","Done");
}
break;
case kPROOF_REPORTSIZE:
{
PDB(kGlobal,1) Info("HandleSocketInput:kPROOF_REPORTSIZE", "Enter");
Bool_t isTree;
TString filename;
TString dir;
TString objname;
Long64_t entries;
Int_t r;
(*mess) >> isTree >> filename >> dir >> objname;
r = TDSet::GetEntries(isTree, filename, dir, objname, entries);
TMessage answ(kPROOF_REPORTSIZE);
answ << r << entries;
fSocket->Send(answ);
PDB(kGlobal,1) Info("HandleSocketInput:kPROOF_REPORTSIZE", "Done");
}
break;
case kPROOF_CHECKFILE:
{
TString filenam;
TMD5 md5;
(*mess) >> filenam >> md5;
if (filenam.BeginsWith("-")) {
// install package:
// compare md5's, untar, store md5 in PROOF-INF, remove par file
Int_t st = 0;
Bool_t err = kFALSE;
filenam = filenam.Strip(TString::kLeading, '-');
TString packnam = filenam;
packnam.Remove(packnam.Length() - 4); // strip off ".par"
// compare md5's to check if transmission was ok
TMD5 *md5local = TMD5::FileChecksum(fPackageDir + "/" + filenam);
if (md5local && md5 == (*md5local)) {
// remove any previous package directory with same name
st = gSystem->Exec(Form("%s %s/%s", kRM, fPackageDir.Data(),
packnam.Data()));
if (st)
Error("HandleInputSocket:kPROOF_CHECKFILE", "failure executing: %s %s/%s",
kRM, fPackageDir.Data(), packnam.Data());
// untar package
st = gSystem->Exec(Form(kUNTAR, fPackageDir.Data(), filenam.Data(),
fPackageDir.Data()));
if (st)
Error("HandleInputSocket:kPROOF_CHECKFILE", "failure executing: %s",
Form(kUNTAR, fPackageDir.Data(), filenam.Data(), fPackageDir.Data()));
// check that fPackageDir/packnam now exists
if (gSystem->AccessPathName(fPackageDir + "/" + packnam, kWritePermission)) {
// par file did not unpack itself in the expected directory, failure
fSocket->Send(kPROOF_FATAL);
err = kTRUE;
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE",
"package %s did not unpack into %s", filenam.Data(),
packnam.Data());
} else {
// store md5 in package/PROOF-INF/md5.txt
TString md5f = fPackageDir + "/" + packnam + "/PROOF-INF/md5.txt";
TMD5::WriteChecksum(md5f, md5local);
fSocket->Send(kPROOF_CHECKFILE);
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE",
"package %s installed on node", filenam.Data());
}
} else {
fSocket->Send(kPROOF_FATAL);
err = kTRUE;
}
if (!IsMaster() || err) {
// delete par file when on slave or in case of error
gSystem->Exec(Form("%s %s/%s", kRM, fPackageDir.Data(),
filenam.Data()));
} else
// forward to slaves
fProof->UploadPackage(fPackageDir + "/" + filenam);
delete md5local;
UnlockPackage();
} else if (filenam.BeginsWith("+")) {
// check file in package directory
filenam = filenam.Strip(TString::kLeading, '+');
TString packnam = filenam;
packnam.Remove(packnam.Length() - 4); // strip off ".par"
TString md5f = fPackageDir + "/" + packnam + "/PROOF-INF/md5.txt";
LockPackage();
TMD5 *md5local = TMD5::ReadChecksum(md5f);
if (md5local && md5 == (*md5local)) {
// package already on server, unlock directory
UnlockPackage();
fSocket->Send(kPROOF_CHECKFILE);
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE",
"package %s already on node", filenam.Data());
if (IsMaster())
fProof->UploadPackage(fPackageDir + "/" + filenam);
} else {
fSocket->Send(kPROOF_FATAL);
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE",
"package %s not yet on node", filenam.Data());
}
delete md5local;
} else {
// check file in cache directory
TString cachef = fCacheDir + "/" + filenam;
LockCache();
TMD5 *md5local = TMD5::FileChecksum(cachef);
if (md5local && md5 == (*md5local)) {
// copy file from cache to working directory
gSystem->Exec(Form("%s %s .", kCP, cachef.Data()));
fSocket->Send(kPROOF_CHECKFILE);
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE", "file %s already on node", filenam.Data());
} else {
fSocket->Send(kPROOF_FATAL);
if (fLogLevel > 1)
Info("HandleSocketInput:kPROOF_CHECKFILE", "file %s not yet on node", filenam.Data());
}
delete md5local;
UnlockCache();
}
}
break;
case kPROOF_SENDFILE:
mess->ReadString(str, sizeof(str));
{
Long_t size;
Int_t bin;
char name[1024];
sscanf(str, "%s %d %ld", name, &bin, &size);
ReceiveFile(name, bin ? kTRUE : kFALSE, size);
// copy file to cache
if (size > 0) {
LockCache();
gSystem->Exec(Form("%s %s %s", kCP, name, fCacheDir.Data()));
UnlockCache();
}
if (IsMaster())
fProof->SendFile(name, bin);
}
break;
case kPROOF_OPENFILE:
{
// NOT CURRENTLY USED, LEFT AS EXAMPLE (TFile::Open() will
// do the forwarding from master to slaves)
// open file on master, if successfull this will also send the
// connect message to the slaves
TString clsnam, filenam, option;
(*mess) >> clsnam >> filenam >> option;
TString cmd;
cmd = "TFile::Open("" + filenam + "", "" + option + "");";
if (IsMaster()) {
if (clsnam == "TNetFile") {
TUrl url(filenam);
Int_t sec = gEnv->GetValue("Rootd.Authentication",
TAuthenticate::kClear);
if (!strcmp(url.GetProtocol(), "roots"))
sec = TAuthenticate::kSRP;
if (!strcmp(url.GetProtocol(), "rootk"))
sec = TAuthenticate::kKrb5;
TAuthenticate auth(0, url.GetHost(), "rootd", sec);
TString user, passwd;
if (auth.CheckNetrc(user, passwd))
ProcessLine(cmd);
else
Error("HandleSocketInput", "cannot execute "%s" since authentication is not possible",
cmd.Data());
} else
ProcessLine(cmd);
} else
ProcessLine(cmd);
}
SendLogFile();
break;
case kPROOF_PARALLEL:
if (IsMaster()) {
Int_t nodes;
(*mess) >> nodes;
fProof->SetParallel(nodes);
SendLogFile();
}
break;
case kPROOF_CACHE:
{
// handle here all cache and package requests:
// type: 1 = ShowCache, 2 = ClearCache, 3 = ShowPackages,
// 4 = ClearPackages, 5 = ClearPackage, 6 = EnablePackage,
// 7 = ShowEnabledPackages
Int_t type;
Bool_t all; //build;
TString package;
(*mess) >> type;
switch (type) {
case 1:
(*mess) >> all;
printf("*** File cache %s:%s ***n", gSystem->HostName(),
fCacheDir.Data());
fflush(stdout);
gSystem->Exec(Form("%s %s", kLS, fCacheDir.Data()));
if (IsMaster() && all)
fProof->ShowCache(all);
break;
case 2:
LockCache();
gSystem->Exec(Form("%s %s/*", kRM, fCacheDir.Data()));
UnlockCache();
if (IsMaster())
fProof->ClearCache();
break;
case 3:
(*mess) >> all;
printf("*** Package cache %s:%s ***n", gSystem->HostName(),
fPackageDir.Data());
fflush(stdout);
gSystem->Exec(Form("%s %s", kLS, fPackageDir.Data()));
if (IsMaster() && all)
fProof->ShowPackages(all);
break;
case 4:
LockPackage();
gSystem->Exec(Form("%s %s/*", kRM, fPackageDir.Data()));
UnlockPackage();
if (IsMaster())
fProof->ClearPackages();
break;
case 5:
(*mess) >> package;
LockPackage();
gSystem->Exec(Form("%s %s/%s", kRM, fPackageDir.Data(),
package.Data()));
UnlockPackage();
if (IsMaster())
fProof->ClearPackage(package);
break;
default:
Error("HandleSocketInput:kPROOF_CACHE", "unknown type %d", type);
break;
}
SendLogFile();
}
break;
default:
Error("HandleSocketInput", "unknown command %d", what);
break;
}
fRealTime += (Float_t)timer.RealTime();
fCpuTime += (Float_t)timer.CpuTime();
delete mess;
}
//______________________________________________________________________________
void TProofServ::HandleUrgentData()
{
// Handle Out-Of-Band data sent by the master or client.
char oob_byte;
int n, nch, wasted = 0;
const int kBufSize = 1024;
char waste[kBufSize];
if (fLogLevel > 5)
Info("HandleUrgentData", "handling oob...");
// Receive the OOB byte
while ((n = fSocket->RecvRaw(&oob_byte, 1, kOob)) < 0) {
if (n == -2) { // EWOULDBLOCK
//
// The OOB data has not yet arrived: flush the input stream
//
// In some systems (Solaris) regular recv() does not return upon
// receipt of the oob byte, which makes the below call to recv()
// block indefinitely if there are no other data in the queue.
// FIONREAD ioctl can be used to check if there are actually any
// data to be flushed. If not, wait for a while for the oob byte
// to arrive and try to read it again.
//
fSocket->GetOption(kBytesToRead, nch);
if (nch == 0) {
gSystem->Sleep(1000);
continue;
}
if (nch > kBufSize) nch = kBufSize;
n = fSocket->RecvRaw(waste, nch);
if (n <= 0) {
Error("HandleUrgentData", "error receiving waste");
break;
}
wasted = 1;
} else {
Error("HandleUrgentData", "error receiving OOB");
return;
}
}
if (fLogLevel > 5)
Info("HandleUrgentData", "got OOB byte: %dn", oob_byte);
switch (oob_byte) {
case TProof::kHardInterrupt:
Info("HandleUrgentData", "*** Hard Interrupt");
// If master server, propagate interrupt to slaves
if (IsMaster())
fProof->Interrupt(TProof::kHardInterrupt);
// Flush input socket
while (1) {
int atmark;
fSocket->GetOption(kAtMark, atmark);
if (atmark) {
// Send the OOB byte back so that the client knows where
// to stop flushing its input stream of obsolete messages
n = fSocket->SendRaw(&oob_byte, 1, kOob);
if (n <= 0)
Error("HandleUrgentData", "error sending OOB");
break;
}
// find out number of bytes to read before atmark
fSocket->GetOption(kBytesToRead, nch);
if (nch == 0) {
gSystem->Sleep(1000);
continue;
}
if (nch > kBufSize) nch = kBufSize;
n = fSocket->RecvRaw(waste, nch);
if (n <= 0) {
Error("HandleUrgentData", "error receiving waste (2)");
break;
}
}
break;
case TProof::kSoftInterrupt:
Info("HandleUrgentData", "Soft Interrupt");
// If master server, propagate interrupt to slaves
if (IsMaster())
fProof->Interrupt(TProof::kSoftInterrupt);
if (wasted) {
Error("HandleUrgentData", "soft interrupt flushed stream");
break;
}
Interrupt();
break;
case TProof::kShutdownInterrupt:
Info("HandleUrgentData", "Shutdown Interrupt");
// If master server, propagate interrupt to slaves
if (IsMaster())
fProof->Interrupt(TProof::kShutdownInterrupt);
Terminate(0); // will not return from here....
break;
default:
Error("HandleUrgentData", "unexpected OOB byte");
break;
}
SendLogFile();
}
//______________________________________________________________________________
void TProofServ::HandleSigPipe()
{
// Called when the client is not alive anymore (i.e. when kKeepAlive
// has failed).
if (IsMaster()) {
// Check if we are here because client is closed. Try to ping client,
// if that works it we are here because some slave died
if (fSocket->Send(kPROOF_PING | kMESS_ACK) < 0) {
Info("HandleSigPipe", "keepAlive probe failed");
// Tell slaves we are going to close since there is no client anymore
fProof->Interrupt(TProof::kShutdownInterrupt);
Terminate(0);
}
} else {
Info("HandleSigPipe", "keepAlive probe failed");
Terminate(0); // will not return from here....
}
}
//______________________________________________________________________________
Bool_t TProofServ::IsParallel() const
{
// True if in parallel mode.
if (IsMaster())
return fProof->IsParallel();
else
return kFALSE;
}
//______________________________________________________________________________
Int_t TProofServ::LockDir(const TString &lock)
{
// Lock a directory. Waits if lock is hold by an other process.
// Returns 0 on success, -1 in case of error.
Int_t *fid;
if (lock == fCacheLock)
fid = &fCacheLockId;
else if (lock == fPackageLock)
fid = &fPackageLockId;
else {
Error("LockDir", "unknown lock file specified %s", lock.Data());
return -1;
}
const char *lfile = lock;
if (gSystem->AccessPathName(lfile))
*fid = open(lfile, O_CREAT|O_RDWR, 0644);
else
*fid = open(lfile, O_RDWR);
if (*fid == -1) {
SysError("LockDir", "cannot open lock file %s", lfile);
return -1;
}
// lock the file
#ifndef R__WIN32
if (lockf(*fid, F_LOCK, (off_t) 1) == -1) {
SysError("LockDir", "error locking %s", lfile);
close(*fid);
*fid = -1;
return -1;
}
#endif
if (fLogLevel > 2)
Info("LockDir", "file %s locked", lfile);
return 0;
}
//______________________________________________________________________________
Int_t TProofServ::UnlockDir(const TString &lock)
{
// Unlock a directory. Returns 0 in case of success,
// -1 in case of error.
Int_t *fid;
if (lock == fCacheLock)
fid = &fCacheLockId;
else if (lock == fPackageLock)
fid = &fPackageLockId;
else {
Error("UnlockDir", "unknown lock file specified %s", lock.Data());
return -1;
}
if (*fid == -1) return 0;
// unlock the file
lseek(*fid, 0, SEEK_SET);
#ifndef R__WIN32
if (lockf(*fid, F_ULOCK, (off_t)1) == -1) {
SysError("UnlockDir", "error unlocking %s", lock.Data());
close(*fid);
*fid = -1;
return -1;
}
#endif
if (fLogLevel > 2)
Info("UnlockDir", "file %s unlocked", lock.Data());
close(*fid);
*fid = -1;
return 0;
}
//______________________________________________________________________________
void TProofServ::Print(Option_t *) const
{
// Print status of slave server.
if (IsMaster())
fProof->Print();
else
Printf("This is slave %s", gSystem->HostName());
}
//______________________________________________________________________________
void TProofServ::RedirectOutput()
{
// Redirect stdout to a log file. This log file will be flushed to the
// client or master after each command.
// Duplicate the initial socket (0), this will yield a socket with
// a descriptor >0, which will free descriptor 0 for stdout.
int isock;
if ((isock = dup(fSocket->GetDescriptor())) < 0)
SysError("RedirectOutput", "could not duplicate output socket");
fSocket->SetDescriptor(isock);
// Remove all previous log files and create new log files.
char logfile[512];
if (IsMaster()) {
sprintf(logfile, "%s/proof_%d.log", fSessionDir.Data(), gSystem->GetPid());
} else {
sprintf(logfile, "%s/proofs%d_%d.log", fSessionDir.Data(), fOrdinal,
gSystem->GetPid());
}
if ((freopen(logfile, "w", stdout)) == 0)
SysError("RedirectOutput", "could not freopen stdout");
if ((dup2(fileno(stdout), fileno(stderr))) < 0)
SysError("RedirectOutput", "could not redirect stderr");
if ((fLogFile = fopen(logfile, "r")) == 0)
SysError("RedirectOutput", "could not open logfile");
}
//______________________________________________________________________________
void TProofServ::Reset(const char *dir)
{
// Reset PROOF environment to be ready for execution of next command.
// First go to new directory.
gDirectory->cd(dir);
// Clear interpreter environment.
gROOT->Reset();
// Make sure current directory is empty (don't delete anything when
// we happen to be in the ROOT memory only directory!?)
if (gDirectory != gROOT) {
TObject *obj;
TIter next(gDirectory->GetList());
while ((obj = next()))
if (!obj->InheritsFrom(TTree::Class())) {
gDirectory->GetList()->Remove(obj);
delete obj;
}
}
}
//______________________________________________________________________________
Int_t TProofServ::ReceiveFile(const char *file, Bool_t bin, Long_t size)
{
// Receive a file, either sent by a client or a master server.
// If bin is true it is a binary file, other wise it is an ASCII
// file and we need to check for Windows r tokens. Returns -1 in
// case of error, 0 otherwise.
if (size <= 0) return 0;
// open file, overwrite already existing file
int fd = open(file, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (fd < 0) {
SysError("ReceiveFile", "error opening file %s", file);
return -1;
}
const Int_t kMAXBUF = 16384; //32768 //16384 //65536;
char buf[kMAXBUF], cpy[kMAXBUF];
Int_t left, r;
Long_t filesize = 0;
while (filesize < size) {
left = Int_t(size - filesize);
if (left > kMAXBUF)
left = kMAXBUF;
r = fSocket->RecvRaw(&buf, left);
if (r > 0) {
char *p = buf;
filesize += r;
while (r) {
Int_t w;
if (!bin) {
Int_t k = 0, i = 0, j = 0;
char *q;
while (i < r) {
if (p[i] == 'r') {
i++;
k++;
}
cpy[j++] = buf[i++];
}
q = cpy;
r -= k;
w = write(fd, q, r);
} else {
w = write(fd, p, r);
}
if (w < 0) {
SysError("ReceiveFile", "error writing to file %s", file);
close(fd);
return -1;
}
r -= w;
p += w;
}
} else if (r < 0) {
Error("ReceiveFile", "error during receiving file %s", file);
close(fd);
return -1;
}
}
close(fd);
chmod(file, 0644);
return 0;
}
//______________________________________________________________________________
void TProofServ::Run(Bool_t retrn)
{
// Main server eventloop.
TApplication::Run(retrn);
}
//______________________________________________________________________________
void TProofServ::SendLogFile(Int_t status)
{
// Send log file to master.
// Determine the number of bytes left to be read from the log file.
fflush(stdout);
off_t ltot, lnow;
Int_t left;
ltot = lseek(fileno(stdout), (off_t) 0, SEEK_END);
lnow = lseek(fileno(fLogFile), (off_t) 0, SEEK_CUR);
left = Int_t(ltot - lnow);
if (left > 0) {
fSocket->Send(left, kPROOF_LOGFILE);
const Int_t kMAXBUF = 32768; //16384 //65536;
char buf[kMAXBUF];
Int_t len;
do {
while ((len = read(fileno(fLogFile), buf, kMAXBUF)) < 0 &&
TSystem::GetErrno() == EINTR)
TSystem::ResetErrno();
if (len < 0) {
SysError("SendLogFile", "error reading log file");
break;
}
if (fSocket->SendRaw(buf, len) < 0) {
SysError("SendLogFile", "error sending log file");
break;
}
} while (len > 0);
}
TMessage mess(kPROOF_LOGDONE);
if (IsMaster())
mess << status << fProof->GetNumberOfActiveSlaves();
else
mess << status << (Int_t) 1;
fSocket->Send(mess);
}
//______________________________________________________________________________
void TProofServ::SendStatus()
{
// Send status of slave server to master or client.
if (!IsMaster()) {
TMessage mess(kPROOF_STATUS);
TString workdir = gSystem->WorkingDirectory(); // expect TString on other side
mess << TFile::GetFileBytesRead() << fRealTime << fCpuTime << workdir;
fSocket->Send(mess);
} else {
fSocket->Send(fProof->GetNumberOfActiveSlaves(), kPROOF_STATUS);
}
}
//______________________________________________________________________________
void TProofServ::Setup()
{
// Print the ProofServ logo on standard output.
char str[512];
if (IsMaster()) {
sprintf(str, "**** Welcome to the PROOF server @ %s ****", gSystem->HostName());
} else {
sprintf(str, "**** PROOF slave server @ %s started ****", gSystem->HostName());
}
fSocket->Send(str);
TMessage *mess;
fSocket->Recv(mess);
if (IsMaster()) {
(*mess) >> fUser >> fPasswd >> fConfFile >> fProtocol;
for (int i = 0; i < fPasswd.Length(); i++) {
char inv = ~fPasswd(i);
fPasswd.Replace(i, 1, inv);
}
} else
(*mess) >> fUser >> fProtocol >> fOrdinal;
delete mess;
// deny write access for group and world
gSystem->Umask(022);
if (IsMaster())
gSystem->Openlog("proofserv", kLogPid | kLogCons, kLogLocal5);
else
gSystem->Openlog("proofslave", kLogPid | kLogCons, kLogLocal6);
// Set $HOME and $PATH. The HOME directory was already set to the
// user's home directory by proofd.
gSystem->Setenv("HOME", gSystem->HomeDirectory());
#ifdef R__UNIX
TString bindir;
# ifdef ROOTBINDIR
bindir = ROOTBINDIR;
# else
bindir = gSystem->Getenv("ROOTSYS");
if (!bindir.IsNull()) bindir += "/bin";
# endif
if (!bindir.IsNull()) bindir += ":";
bindir += "/bin:/usr/bin:/usr/local/bin";
gSystem->Setenv("PATH", bindir);
#endif
// goto to the "~/proof" main PROOF working directory
char *workdir = gSystem->ExpandPathName(kPROOF_WorkDir);
if (gSystem->AccessPathName(workdir)) {
gSystem->MakeDirectory(workdir);
if (!gSystem->ChangeDirectory(workdir)) {
SysError("Setup", "can not change to PROOF directory %s",
workdir);
}
} else {
if (!gSystem->ChangeDirectory(workdir)) {
gSystem->Unlink(workdir);
gSystem->MakeDirectory(workdir);
if (!gSystem->ChangeDirectory(workdir)) {
SysError("Setup", "can not change to PROOF directory %s",
workdir);
}
}
}
// check and make sure "cache" directory exists
fCacheDir = workdir;
fCacheDir += TString("/") + kPROOF_CacheDir;
if (gSystem->AccessPathName(fCacheDir))
gSystem->MakeDirectory(fCacheDir);
fCacheLock = fCacheDir + "/" + kPROOF_LockFile;
// check and make sure "packages" directory exists
fPackageDir = workdir;
fPackageDir += TString("/") + kPROOF_PackDir;
if (gSystem->AccessPathName(fPackageDir))
gSystem->MakeDirectory(fPackageDir);
fPackageLock = fPackageDir + "/" + kPROOF_LockFile;
// create session directory and make it the working directory
fSessionDir = workdir;
if (IsMaster())
fSessionDir += "/master-";
else
fSessionDir += "/slave-";
fSessionDir += TTimeStamp().GetSec();
fSessionDir += "-";
fSessionDir += gSystem->GetPid();
if (gSystem->AccessPathName(fSessionDir)) {
gSystem->MakeDirectory(fSessionDir);
if (!gSystem->ChangeDirectory(fSessionDir)) {
SysError("Setup", "can not change to working directory %s",
fSessionDir.Data());
}
}
delete [] workdir;
// Incoming OOB should generate a SIGURG
fSocket->SetOption(kProcessGroup, gSystem->GetPid());
// Send packages off immediately to reduce latency
fSocket->SetOption(kNoDelay, 1);
// Check every two hours if client is still alive
fSocket->SetOption(kKeepAlive, 1);
// Install SigPipe handler to handle kKeepAlive failure
gSystem->AddSignalHandler(new TProofServSigPipeHandler(this));
}
//______________________________________________________________________________
void TProofServ::Terminate(int status)
{
// Terminate the proof server.
// Cleanup session directory
if (status == 0)
gSystem->Exec(Form("%s %s", kRM, fSessionDir.Data()));
gSystem->Exit(status);
}
//______________________________________________________________________________
Bool_t TProofServ::IsActive()
{
// Static function that returns kTRUE in case we are a PROOF server.
return gProofServ ? kTRUE : kFALSE;
}
//______________________________________________________________________________
TProofServ *TProofServ::This()
{
// Static function returning pointer to global object gProofServ.
// Mainly for use via CINT, where the gProofServ symbol might be
// deleted from the symbol table.
return gProofServ;
}
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