// @(#)root/base:$Name: $:$Id: TSystem.cxx,v 1.4 2000/08/18 14:58:14 brun Exp $
// Author: Fons Rademakers 15/09/95
/*************************************************************************
* 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. *
*************************************************************************/
//////////////////////////////////////////////////////////////////////////
// //
// TSystem //
// //
// Abstract base class defining a generic interface to the underlying //
// Operating System. //
// This is not an ABC in the strict sense of the (C++) word. For //
// every member function their is an implementation (often not more //
// than a call to AbstractMethod() which prints a warning saying //
// that the method should be overridden in a derived class), which //
// allows a simple partial implementation for new OS'es. //
// //
//////////////////////////////////////////////////////////////////////////
#include <stdlib.h>
#include <errno.h>
#include <fstream.h>
#include "TSystem.h"
#include "TApplication.h"
#include "TException.h"
#include "TSysEvtHandler.h"
#include "TROOT.h"
#include "TBrowser.h"
#include "TString.h"
#include "TOrdCollection.h"
#include "TCint.h"
#include "TRegexp.h"
#include "TTimer.h"
#include "TObjString.h"
#include "compiledata.h"
const char *gSystemName;
const char *gRootDir;
const char *gProgName;
const char *gRootName;
const char *gProgPath;
TSystem *gSystem;
TSysEvtHandler *gXDisplay = 0; // Display server event handler, set in TGClient
ClassImp(TProcessEventTimer)
//______________________________________________________________________________
TProcessEventTimer::TProcessEventTimer(Long_t delay) : TTimer(delay, kFALSE)
{
// Create async event processor timer.
gROOT->SetInterrupt(kFALSE);
gSystem->AddTimer(this);
}
//______________________________________________________________________________
Bool_t TProcessEventTimer::ProcessEvents()
{
// Process events if timer did time out. Returns kTRUE if intterrupt
// flag is set (by hitting a key in the canvas or selecting the
// Interrupt menu item in canvas or some other action).
if (fTimeout) {
if (gSystem->ProcessEvents()) {
Remove();
return kTRUE;
} else {
Reset();
return kFALSE;
}
}
return kFALSE;
}
ClassImp(TSystem)
//______________________________________________________________________________
TSystem::TSystem(const char *name, const char *title) : TNamed(name, title)
{
// Create a new OS interface.
fOnExitList = 0;
fSignalHandler = 0;
fFileHandler = 0;
fTimers = 0;
fCompiled = 0;
}
//______________________________________________________________________________
TSystem::~TSystem()
{
// Delete the OS interface.
if (fOnExitList) {
fOnExitList->Delete();
SafeDelete(fOnExitList);
}
if (fSignalHandler) {
fSignalHandler->Delete();
SafeDelete(fSignalHandler);
}
if (fFileHandler) {
fFileHandler->Delete();
SafeDelete(fFileHandler);
}
if (fTimers) {
fTimers->Delete();
SafeDelete(fTimers);
}
if (fCompiled) {
fCompiled->Delete();
SafeDelete(fCompiled);
}
if (gSystem == this)
gSystem = 0;
}
//______________________________________________________________________________
Bool_t TSystem::Init()
{
// Initialize the OS interface. Copy the OS name (i.e. Unix) and the
// ROOT name to gSystemName and gRootName, respectively.
fNfd = 0;
fMaxrfd = 0;
fMaxwfd = 0;
fReadmask.Zero();
fWritemask.Zero();
fSigcnt = 0;
fLevel = 0;
fSignalHandler = new TOrdCollection;
fFileHandler = new TOrdCollection;
fTimers = new TOrdCollection;
fIncludePath = INCLUDEPATH;
fLinkedLibs = LINKEDLIBS;
fSoExt = SOEXT;
fObjExt = OBJEXT;
fMakeSharedLib = MAKESHAREDLIB;
fMakeExe = MAKEEXE;
fCompiled = new TOrdCollection;
gSystemName = StrDup(fName.Data());
gRootName = StrDup(gROOT->GetName());
if (!fName.CompareTo("Generic")) return kTRUE;
return kFALSE;
}
//______________________________________________________________________________
void TSystem::SetProgname(const char *name)
{
// Set the application name (from command line, argv[0]) and copy it in
// gProgName.
gProgName = StrDup(name);
}
//______________________________________________________________________________
void TSystem::SetDisplay()
{
// Set DISPLAY environment variable based on utmp entry. Only for UNIX.
}
//______________________________________________________________________________
const char *TSystem::GetError()
{
// Return system error string.
return Form("errno: %d", GetErrno());
}
//______________________________________________________________________________
Int_t TSystem::GetErrno()
{
// Static function returning system error number.
#ifdef R__SOLARIS_CC50
return ::errno;
#else
return errno;
#endif
}
//______________________________________________________________________________
void TSystem::ResetErrno()
{
// Static function resetting system error number.
#ifdef R__SOLARIS_CC50
::errno = 0;
#else
errno = 0;
#endif
}
//______________________________________________________________________________
void TSystem::RemoveOnExit(TObject *obj)
{
// Objects that should be deleted on exit of the OS interface.
if (fOnExitList == 0)
fOnExitList = new TOrdCollection;
if (fOnExitList->FindObject(obj) == 0)
fOnExitList->Add(obj);
}
//______________________________________________________________________________
const char *TSystem::HostName()
{
// Return the system's host name.
return "Local host";
}
//---- EventLoop ---------------------------------------------------------------
//______________________________________________________________________________
void TSystem::Run()
{
// System event loop.
fInControl = kTRUE;
fDone = kFALSE;
#ifdef R__EH
try {
#endif
RETRY {
while (!fDone) {
gApplication->StartIdleing();
InnerLoop();
gApplication->StopIdleing();
}
} ENDTRY;
#ifdef R__EH
}
catch (const char *str) {
printf("%s\n", str);
}
// handle every exception
catch (...) {
Warning("Run", "handle uncaugth exception, terminatingn");
}
#endif
fInControl = kFALSE;
}
//______________________________________________________________________________
void TSystem::ExitLoop()
{
// Exit from event loop.
fDone = kTRUE;
}
//______________________________________________________________________________
void TSystem::InnerLoop()
{
// Inner event loop.
fLevel++;
DispatchOneEvent();
fLevel--;
}
//______________________________________________________________________________
Bool_t TSystem::ProcessEvents()
{
// Process pending events (GUI, timers, sockets). Returns the result of
// TROOT::IsInterrupted(). The interrupt flag (TROOT::SetInterrupt())
// can be set during the handling of the events. This mechanism allows
// macros running in tight calculating loops to be interrupted by some
// GUI event (depending on the interval with which this method is
// called). For example hitting ctrl-c in a canvas will set the
// interrupt flag.
gROOT->SetInterrupt(kFALSE);
if (!gROOT->IsBatch())
DispatchOneEvent(kTRUE);
return gROOT->IsInterrupted();
}
//______________________________________________________________________________
void TSystem::DispatchOneEvent(Bool_t)
{
// Dispatch a single event.
AbstractMethod("DispatchOneEvent");
}
//______________________________________________________________________________
void TSystem::Sleep(UInt_t)
{
// Sleep milliSec milli seconds.
AbstractMethod("Sleep");
}
//---- handling of system events -----------------------------------------------
//______________________________________________________________________________
TTime TSystem::Now()
{
// Return current time.
return TTime(0);
}
//______________________________________________________________________________
void TSystem::AddTimer(TTimer *ti)
{
// Add timer to list of system timers.
if (ti && fTimers && (fTimers->FindObject(ti) == 0))
fTimers->Add(ti);
}
//______________________________________________________________________________
TTimer *TSystem::RemoveTimer(TTimer *ti)
{
// Remove timer from list of system timers.
if (fTimers) {
fTimers->Remove(ti);
return ti;
}
return 0;
}
//______________________________________________________________________________
Long_t TSystem::NextTimeOut(Bool_t mode)
{
// Time when next timer of mode (synchronous=kTRUE or
// asynchronous=kFALSE) will time-out (in ms).
if (!fTimers) return -1;
TIter next(fTimers);
TTimer *t;
Long_t tt, timeout = -1, tnow = Now();
while ((t = (TTimer *)next())) {
if (t->IsSync() == mode) {
tt = (long)t->GetAbsTime() - tnow;
if (tt < 0) tt = 0;
if (timeout == -1) timeout = tt;
if (tt < timeout) timeout = tt;
}
}
return timeout;
}
//______________________________________________________________________________
void TSystem::AddSignalHandler(TSignalHandler *h)
{
// Add a signal handler to list of system signal handlers.
if (h && fSignalHandler && (fSignalHandler->FindObject(h) == 0))
fSignalHandler->Add(h);
}
//______________________________________________________________________________
TSignalHandler *TSystem::RemoveSignalHandler(TSignalHandler *h)
{
// Remove a signal handler from list of signal handlers.
if (fSignalHandler) {
fSignalHandler->Remove(h);
return h;
}
return 0;
}
//______________________________________________________________________________
void TSystem::AddFileHandler(TFileHandler *h)
{
// Add a file handler to the list of system file handlers.
if (h && fFileHandler && (fFileHandler->FindObject(h) == 0))
fFileHandler->Add(h);
}
//______________________________________________________________________________
TFileHandler *TSystem::RemoveFileHandler(TFileHandler *h)
{
// Remove a file handler from the list of file handlers.
if (fFileHandler) {
fFileHandler->Remove(h);
return h;
}
return 0;
}
//______________________________________________________________________________
void TSystem::IgnoreInterrupt(Bool_t)
{
// Ignore the interrupt signal if ignore == kTRUE else restore previous
// behaviour. Typically call ignore interrupt before writing to disk.
AbstractMethod("IgnoreInterrupt");
}
//---- Processes ---------------------------------------------------------------
//______________________________________________________________________________
int TSystem::Exec(const char*)
{
// Execute a command.
AbstractMethod("Exec");
return -1;
}
//______________________________________________________________________________
FILE *TSystem::OpenPipe(const char*, const char*)
{
// Open a pipe.
AbstractMethod("OpenPipe");
return 0;
}
//______________________________________________________________________________
int TSystem::ClosePipe(FILE*)
{
// Close the pipe.
AbstractMethod("ClosePipe");
return -1;
}
//______________________________________________________________________________
int TSystem::GetPid()
{
// Get process id.
AbstractMethod("GetPid");
return -1;
}
//______________________________________________________________________________
void TSystem::Exit(int, Bool_t)
{
// Exit the application.
AbstractMethod("Exit");
}
//______________________________________________________________________________
void TSystem::Abort(int)
{
// Abort the application.
AbstractMethod("Abort");
}
//______________________________________________________________________________
void TSystem::StackTrace()
{
// Print a stack trace.
AbstractMethod("StackTrace");
}
//---- Directories -------------------------------------------------------------
//______________________________________________________________________________
int TSystem::MakeDirectory(const char*)
{
// Make a directory. Returns 0 in case of success and
// -1 if the directory could not be created.
AbstractMethod("MakeDirectory");
return 0;
}
//______________________________________________________________________________
void *TSystem::OpenDirectory(const char*)
{
// Open a directory. Returns 0 if directory does not exist.
AbstractMethod("OpenDirectory");
return 0;
}
//______________________________________________________________________________
void TSystem::FreeDirectory(void*)
{
// Free a directory.
AbstractMethod("FreeDirectory");
}
//______________________________________________________________________________
const char *TSystem::GetDirEntry(void*)
{
// Get a directory entry. Returns 0 if no more entries.
AbstractMethod("GetDirEntry");
return 0;
}
//______________________________________________________________________________
Bool_t TSystem::ChangeDirectory(const char*)
{
// Change directory.
AbstractMethod("ChangeDirectory");
return kFALSE;
}
//______________________________________________________________________________
const char *TSystem::WorkingDirectory()
{
// Return working directory.
return 0;
}
//______________________________________________________________________________
const char *TSystem::HomeDirectory(const Char_t*)
{
// Return the user's home directory.
return 0;
}
//---- Paths & Files -----------------------------------------------------------
//______________________________________________________________________________
const char *TSystem::BaseName(const char *name)
{
// Base name of a file name. Base name of /user/root is root.
if (name) {
if (name[0] == '/' && name[1] == '0')
return name;
char *cp;
if ((cp = (char*)strrchr(name, '/')))
return ++cp;
return name;
}
Error("BaseName", "name = 0");
return 0;
}
//______________________________________________________________________________
Bool_t TSystem::IsAbsoluteFileName(const char *dir)
{
// Return true if dir is an absolute pathname.
if (dir)
return dir[0] == '/';
return kFALSE;
}
//______________________________________________________________________________
const char *TSystem::DirName(const char *pathname)
{
// Return the directory name in pathname. DirName of /user/root is /user.
if (pathname && strchr(pathname, '/')) {
static char buf[1000];
strcpy(buf, pathname);
char *r = strrchr(buf, '/');
if (r != buf)
*r = '0';
else
*(r+1) = '0';
return buf;
}
return WorkingDirectory();
}
//______________________________________________________________________________
const char *TSystem::UnixPathName(const char *name)
{
// Convert from a Unix pathname to a local pathname. E.g. from /user/root to user\root.
return name;
}
//______________________________________________________________________________
char *TSystem::ConcatFileName(const char *, const char *)
{
// Concatenate a directory and a file name.
AbstractMethod("ConcatFileName");
return 0;
}
//---- Paths & Files -----------------------------------------------------------
//______________________________________________________________________________
const char *TSystem::ExpandFileName(const char *fname)
{
// Expand a pathname getting rid of special shell characters like ~.$, etc.
// For Unix/Win32 compatibility use $(XXX) instead of $XXX when using
// environment variables in a pathname. If compatibility is not an issue
// you can use on Unix directly $XXX. This is a protected function called
// from the OS specific system classes, like TUnixSystem and TWinNTSystem.
const int kBufSize = 1024;
int n, ier, iter, lx, ncopy;
char *inp, *out, *c, *b, *e, *x, *t, buff[kBufSize*3];
const char *p;
static char xname[kBufSize];
iter = 0; xname[0] = 0; inp = buff + kBufSize; out = inp + kBufSize;
inp[-1] = ' '; inp[0] = 0; out[-1] = ' ';
c = (char *)fname + strspn(fname, " t\fr");
if (isalnum(c[0])) { strcpy(inp, WorkingDirectory()); strcat(inp, "/"); } // add $cwd
strcat(inp, c);
again:
iter++; c = inp; ier = 0;
x = out; x[0] = 0;
for ( ; (c[0]) && c[0] != ' ' ; c++) {
p = 0; e = 0;
if (c[0] == '~' && c[1] == '/') { // ~/ case
p = HomeDirectory(); e = c + 1; if (!p) ier++;
}
if (p) { // we have smth to copy
strcpy(x, p); x += strlen(p); c = e-1; continue;
}
p = 0;
if (c[0] == '~' && c[1] != '/') { // ~user case
n = strcspn(c+1, "/ "); buff[0] = 0; strncat(buff, c+1, n);
p = HomeDirectory(buff); e = c+1+n;
}
if (p) { // we have smth to copy
strcpy(x,p); x += strlen(p); c = e-1; continue;
}
p = 0;
if (c[0] == '.' && c[1] == '/' && c[-1] == ' ') { // $cwd
p = strcpy(buff, WorkingDirectory()); e = c + 1; if (!p) ier++;
}
if (p) { // we have smth to copy */
strcpy(x,p); x += strlen(p); c = e-1; continue;
}
if (c[0] != '$') { // not $, simple copy
x++[0] = c[0];
} else { // we have a $
b = c+1;
if (c[1] == '(') b++;
if (c[1] == '{') b++;
for (e = b; isalnum(e[0]) || e[0] == '_'; e++) ;
buff[0] = 0; strncat(buff, b, e-b);
p = Getenv(buff);
if (!p) { // too bad, try UPPER case
for (t = buff; (t[0] = toupper(t[0])); t++) ;
p = Getenv(buff);
}
if (!p) { // too bad, try Lower case
for (t = buff; (t[0] = tolower(t[0])); t++) ;
p = Getenv(buff);
}
if (!p && !strcmp(buff, "cwd")) { // it is $cwd
p = strcpy(buff, WorkingDirectory());
}
if (!p) { // too bad, nothing can help
ier++; x++[0] = c[0];
} else { // It is OK, copy result
strcpy(x,p); x += strlen(p); c = (b==c+1) ? e-1 : e;
}
}
}
x[0] = 0; lx = x - out;
if (ier && iter < 3) { strcpy(inp,out); goto again; }
ncopy = (lx >= kBufSize) ? kBufSize-1 : lx;
xname[0] = 0; strncat(xname,out,ncopy);
if (ier || ncopy != lx)
Error("ExpandFileName", "input: %s, output: %s", fname, xname);
return xname;
}
//______________________________________________________________________________
Bool_t TSystem::ExpandPathName(TString&)
{
// Expand a pathname getting rid of special shell characaters like ~.$, etc.
// For Unix/Win32 compatibility use $(XXX) instead of $XXX when using
// environment variables in a pathname. If compatibility is not an issue
// you can use on Unix directly $XXX.
return kFALSE;
}
//______________________________________________________________________________
char *TSystem::ExpandPathName(const char *)
{
// Expand a pathname getting rid of special shell characaters like ~.$, etc.
// For Unix/Win32 compatibility use $(XXX) instead of $XXX when using
// environment variables in a pathname. If compatibility is not an issue
// you can use on Unix directly $XXX. The user must delete returned string.
return 0;
}
//______________________________________________________________________________
Bool_t TSystem::AccessPathName(const char*, EAccessMode)
{
// Returns FALSE if one can access a file using the specified access mode.
return kFALSE;
}
//______________________________________________________________________________
void TSystem::Rename(const char *, const char *)
{
// Rename a file.
AbstractMethod("Rename");
}
//______________________________________________________________________________
int TSystem::Link(const char *, const char *)
{
// Create a link from file1 to file2.
AbstractMethod("Link");
return -1;
}
//______________________________________________________________________________
int TSystem::Symlink(const char *, const char *)
{
// Create a symbolic link from file1 to file2.
AbstractMethod("Symlink");
return -1;
}
//______________________________________________________________________________
int TSystem::Unlink(const char *)
{
// Unlink, i.e. remove, a file.
AbstractMethod("Unlink");
return -1;
}
//______________________________________________________________________________
int TSystem::GetPathInfo(const char*, Long_t*, Long_t*, Long_t*, Long_t*)
{
// Get info about a file: id, size, flags, modification time.
AbstractMethod("GetPathInfo");
return -1;
}
//______________________________________________________________________________
int TSystem::Umask(Int_t)
{
// Set the process file creation mode mask.
AbstractMethod("Umask");
return -1;
}
//______________________________________________________________________________
char *TSystem::Which(const char *, const char *, EAccessMode)
{
// Find location of file in a search path. User must delete returned string.
AbstractMethod("Which");
return 0;
}
//---- environment manipulation ------------------------------------------------
//______________________________________________________________________________
void TSystem::Setenv(const char*, const char*)
{
// Set environment variable.
AbstractMethod("Setenv");
}
//______________________________________________________________________________
void TSystem::Unsetenv(const char *name)
{
// Unset environment variable.
Setenv(name, 0);
}
//______________________________________________________________________________
const char *TSystem::Getenv(const char*)
{
// Get environment variable.
AbstractMethod("Getenv");
return 0;
}
//---- System Logging ----------------------------------------------------------
//______________________________________________________________________________
void TSystem::Openlog(const char *, Int_t, ELogFacility)
{
// Open connection to system log daemon. For the use of the options and
// facility see the Unix openlog man page.
AbstractMethod("Openlog");
}
//______________________________________________________________________________
void TSystem::Syslog(ELogLevel, const char *)
{
// Send mess to syslog daemon. Level is the logging level and mess the
// message that will be written on the log.
AbstractMethod("Syslog");
}
//______________________________________________________________________________
void TSystem::Closelog()
{
// Close connection to system log daemon.
AbstractMethod("Closelog");
}
//---- Dynamic Loading ---------------------------------------------------------
//______________________________________________________________________________
int TSystem::Load(const char *module, const char *entry, Bool_t system)
{
// Load a shared library. Returns 0 on successful loading, 1 in
// case lib was already loaded and -1 in case lib does not exist
// or in case of error. When entry is specified the loaded lib is
// search for this entry point (return -1 when entry does not exist,
// 0 otherwise). When the system flag is kTRUE, the library is consisdered
// a permanent systen library that should not be unloaded during the
// course of the session.
#ifdef NOCINT
AbstractMethod("Load");
return 0;
#else
char *path;
int i = -1;
if ((path = DynamicPathName(module))) {
if (!system)
i = G__loadfile(path);
else
i = G__loadsystemfile(path);
delete [] path;
}
if (!entry || !strlen(entry)) return i;
Func_t f = DynFindSymbol(module, entry);
if (f) return 0;
return -1;
#endif
}
//______________________________________________________________________________
char *TSystem::DynamicPathName(const char *, Bool_t)
{
AbstractMethod("DynamicPathName");
return 0;
}
//______________________________________________________________________________
Func_t TSystem::DynFindSymbol(const char * /*lib*/, const char *entry)
{
// Find specific entry point in specified library. Specify "*" for lib
// to search in all libraries.
#ifdef NOCINT
AbstractMethod("DynFindSymbol");
return 0;
#else
return G__findsym(entry);
#endif
}
//______________________________________________________________________________
void TSystem::Unload(const char *)
{
// Unload a shared library.
AbstractMethod("UnLoad");
}
//______________________________________________________________________________
void TSystem::ListSymbols(const char *, const char *)
{
// List symbols in a shared library.
AbstractMethod("ListSymbols");
}
//______________________________________________________________________________
void TSystem::ListLibraries(const char *regexp)
{
// List all loaded shared libraries.
TString libs = GetLibraries(regexp);
TRegexp separator("[^ \t\s]+");
TString s;
Ssiz_t start = 0, index = 0, end = 0;
int i = 0;
Printf("");
Printf("Loaded shared libraries");
Printf("=======================");
while ((start < libs.Length()) && (index != kNPOS)) {
index = libs.Index(separator, &end, start);
if (index >= 0) {
s = libs(index, end);
if (s.BeginsWith("-")) {
if (s.BeginsWith("-l")) {
Printf("%s", s.Data());
i++;
}
} else {
Printf("%s", s.Data());
i++;
}
}
start += end+1;
}
Printf("-----------------------");
Printf("%d libraries loaded", i);
Printf("=======================");
}
//______________________________________________________________________________
const char *TSystem::GetLibraries(const char *regexp, const char *options)
{
// Return a space separated list of loaded shared libraries.
// This list is of a format suitable for a linker, i.e it may contain
// -Lpathname and/or -lNameOfLib.
// Option can be any of:
// S: shared libraries loaded at the start of the executable, because
// they were specified on the link line.
// D: shared libraries dynamically loaded after the start of the program.
fListLibs = "";
TString libs = "";
TString opt = options;
if ((opt.Length()==0) || (opt.First('D')!=kNPOS))
libs += gInterpreter->GetSharedLibs();
if ((opt.Length()==0) || (opt.First('S')!=kNPOS)) {
if (!libs.IsNull()) libs.Append(" ");
libs.Append(fLinkedLibs);
}
// Select according to regexp
if (regexp!=0 && strlen(regexp)!=0) {
TRegexp separator("[^ \t\s]+");
TRegexp user_re(regexp, kTRUE);
TString s;
Ssiz_t start, index, end;
start = index = end = 0;
while ((start < libs.Length()) && (index != kNPOS)) {
index = libs.Index(separator,&end,start);
if (index >= 0) {
s = libs(index,end);
if (s.Index(user_re) != kNPOS) {
if (!fListLibs.IsNull())
fListLibs.Append(" ");
fListLibs.Append(s);
}
}
start += end+1;
}
} else
fListLibs = libs;
return fListLibs;
}
//---- RPC ---------------------------------------------------------------------
//______________________________________________________________________________
TInetAddress TSystem::GetHostByName(const char *)
{
// Get Internet Protocol (IP) address of host.
AbstractMethod("GetHostByName");
return TInetAddress();
}
//______________________________________________________________________________
TInetAddress TSystem::GetPeerName(int)
{
// Get Internet Protocol (IP) address of remote host and port #.
AbstractMethod("GetPeerName");
return TInetAddress();
}
//______________________________________________________________________________
TInetAddress TSystem::GetSockName(int)
{
// Get Internet Protocol (IP) address of host and port #.
AbstractMethod("GetSockName");
return TInetAddress();
}
//______________________________________________________________________________
int TSystem::GetServiceByName(const char *)
{
// Get port # of internet service.
AbstractMethod("GetServiceByName");
return -1;
}
//______________________________________________________________________________
char *TSystem::GetServiceByPort(int)
{
// Get name of internet service.
AbstractMethod("GetServiceByPort");
return 0;
}
//______________________________________________________________________________
int TSystem::OpenConnection(const char*, int)
{
// Open a connection to another host.
AbstractMethod("OpenConnection");
return -1;
}
//______________________________________________________________________________
int TSystem::AnnounceTcpService(int, Bool_t, int)
{
// Announce TCP/IP service.
AbstractMethod("AnnounceTcpService");
return -1;
}
//______________________________________________________________________________
int TSystem::AnnounceUnixService(int, int)
{
// Announce unix domain service.
AbstractMethod("AnnounceUnixService");
return -1;
}
//______________________________________________________________________________
int TSystem::AcceptConnection(int)
{
// Accept a connection.
AbstractMethod("AcceptConnection");
return -1;
}
//______________________________________________________________________________
void TSystem::CloseConnection(int, Bool_t)
{
// Close socket connection.
AbstractMethod("CloseConnection");
}
//______________________________________________________________________________
int TSystem::RecvRaw(int, void *, int, int)
{
// Receive exactly length bytes into buffer. Use opt to receive out-of-band
// data or to have a peek at what is in the buffer (see TSocket).
AbstractMethod("RecvRaw");
return -1;
}
//______________________________________________________________________________
int TSystem::SendRaw(int, const void *, int, int)
{
// Send exactly length bytes from buffer. Use opt to send out-of-band
// data (see TSocket).
AbstractMethod("SendRaw");
return -1;
}
//______________________________________________________________________________
int TSystem::RecvBuf(int, void *, int)
{
// Receive a buffer headed by a length indicator.
AbstractMethod("RecvBuf");
return -1;
}
//______________________________________________________________________________
int TSystem::SendBuf(int, const void *, int)
{
// Send a buffer headed by a length indicator.
AbstractMethod("SendBuf");
return -1;
}
//______________________________________________________________________________
int TSystem::SetSockOpt(int, int, int)
{
// Set socket option.
AbstractMethod("SetSockOpt");
return -1;
}
//______________________________________________________________________________
int TSystem::GetSockOpt(int, int, int*)
{
// Get socket option.
AbstractMethod("GetSockOpt");
return -1;
}
//---- Script Compiler ---------------------------------------------------------
//______________________________________________________________________________
int TSystem::CompileMacro(const char *filename, Option_t * opt)
{
// This method compiles and loads a shared library containing
// the code from the file "filename".
//
// The possible options are:
// k : keep the shared library after the session end.
// f : force recompilation.
//
// It uses the directive fMakeSharedLibs to create a shared library.
// If loading the shared library fails, it tries to output a list of missing
// symbols by creating an executable (on some platforms like OSF, this does
// not HAVE to be an executable) containing the script. It uses the
// directive fMakeExe to do so.
// For both directives, before passing them to TSystem::Exec, it expands the
// variables $SourceFiles, $SharedLib, $LibName, $IncludePath, $LinkedLibs,
// $ExeName and $ObjectFiles. See SetMakeSharedLib() for more information on
// those variables.
//
// This method is used to implement the following feature:
//
// Synopsis:
//
// The purpose of this addition is to allow the user to use an external
// compiler to create a shared library from its C++ macro (scripts).
// Currently in order to execute a script, a user has to type at the root
// prompt
//
// .X myfunc.C(arg1,arg2)
//
// We allow him to type:
//
// .X myfunc.C++(arg1,arg2)
// or
// .X myfunc.C+(arg1,arg2)
//
// In which case an external compiler will be called to create a shared
// library. This shared library will then be loaded and the function
// myfunc will be called with the two arguments. With '++' the shared library
// is always recompiled. With '+' the shared library is recompiled only
// if it does not exist yet or the macro file is newer than the shared
// library.
//
// HOWEVER, CompileMacro currently does NOT detect if any of the file that
// are included by the macro file has been changed!!!
//
// Of course the + and ++ notation is supported in similar way for .x and .L.
//
// Through the function TSystem::SetMakeSharedLib(), the user will be able to
// indicate, with shell commands, how to build a shared library (a good
// default will be provided). The most common change, namely where to find
// header files, will be available through the function
// TSystem::SetIncludePath().
// A good default will be provided so that a typical user session should be at
// most:
//
// root[1] gSystem->SetIncludePath("-I$ROOTSYS/include
// -I$HOME/mypackage/include");
// root[2] .x myfunc.C++(10,20);
//
// The user may sometimes try to compile a script before it has loaded all the
// needed shared libraries. In this case we want to be helpfull and output a
// list of the unresolved symbols. So if the loading of the created shared
// library fails, we will try to build a executable that contains the
// script. The linker should then output a list of missing symbols.
//
// To support this we provide a TSystem::SetMakeExe() function, that sets the
// directive telling how to create an executable. The loader will need
// to be informed of all the libraries available. The information about
// the libraries that has been loaded by .L and TSystem::Load() is accesible
// to the script compiler. However, the information about
// the libraries that have been selected at link time by the application
// builder (like the root libraries for root.exe) are not available and need
// to be explictly listed in fLinkedLibs (either by default or by a call to
// TSystem::SetLinkedLibs()).
//
// To simplify customization we could also add to the .rootrc support for the
// variables
//
// Unix.*.Root.IncludePath: -I$ROOTSYS/include
// WinNT.*.Root.IncludePath: -I%ROOTSYS%/include
//
// Unix.*.Root.LinkedLibs: -L$ROOTSYS/lib -lBase ....
// WinNT.*.Root.LinkedLibs: %ROOTSYS%/lib/*.lib msvcrt.lib ....
//
// And also support for MakeSharedLibs() and MakeExe().
//
// (the ... have to be replaced by the actual values and are here only to
// shorten this comment).
// Analyze the options
Bool_t keep = kFALSE;
Bool_t recompile = kFALSE;
if (opt) {
keep = (strchr(opt,'k')!=0);
recompile = (strchr(opt,'f')!=0);
}
// Get the right file names for the dictionnary and the shared library
TString library = filename;
ExpandFileName( library );
Ssiz_t where = library.Last('.');
TString extension = filename;
extension.Replace( 0, where+1, 0 , 0);
// Extension of shared library is platform dependent!!
library.Replace( where+1, library.Length()-where, fSoExt );
TString libname = filename;
libname.Remove(where);
TString filename_noext = libname;
libname.Replace( 0, libname.Last('/')+1, 0, 0);
libname.Replace( 0, libname.Last('\')+1, 0, 0);
if ( gInterpreter->IsLoaded(filename) ) {
// the script has already been loaded in interpreted mode
// Let's warn the user and unload it.
cerr << "script has already been loaded in interpreted mode" << endl;
cerr << "Unloading " << filename << " and compiling it" << endl;
if ( G__unloadfile( (char*) filename ) != 0 ) {
// We can not unload it.
return(G__LOADFILE_FAILURE);
}
}
Bool_t modified = kFALSE;
if ( !recompile ) {
Long_t lib_time, script_time;
if ( GetPathInfo( library, 0, 0, 0, &lib_time ) == 0 ) {
// If the time library is older than the script we
// are going to recompile !
GetPathInfo( filename, 0, 0, 0, &script_time );
modified = ( lib_time <= script_time );
recompile = modified;
} else {
recompile = kTRUE;
}
}
if ( gInterpreter->IsLoaded(library)
|| strlen(GetLibraries(library,"D")) != 0 ) {
// The library has already been built and loaded.
if (modified)
cerr << "Modified ";
else
cerr << "Unmodified ";
cerr << "script has already been compiled and loaded. " << endl;
if ( !recompile ) {
return G__LOADFILE_SUCCESS;
} else {
#ifdef R__KCC
cerr << "Shared library can not be updated!" << endl;
#else
cerr << "It will be regenerated and reloaded!" << endl;
#endif
#ifdef R__KCC
return G__LOADFILE_DUPLICATE;
#else
// the following is not working in KCC because it seems that dlclose
// does not properly get rid of the object. It WILL provoke a
// core dump at termination.
if ( G__unloadfile( (char*) library.Data() ) != 0 ) {
// The library is being used. We can not unload it.
return(G__LOADFILE_FAILURE);
}
Unlink(library);
#endif
}
}
if (!recompile) {
// The library already exist, let's just load it.
return !gSystem->Load(library);
}
cerr << "Creating shared library " << library << endl;
TString dict = tmpnam(0);
// do a basename to remove /var/tmp
// because because some compiler do not add a -I. when compiling
// file given by full pathname!
dict.Replace( 0, dict.Last('/')+1, 0, 0);
// for windows style
dict.Replace( 0, dict.Last('\')+1, 0, 0);
// the file name end up in the file produced
// by rootcint as a variable name so all character need to be valid!
dict.ReplaceAll( "-","_" );
if ( dict.Last('.')!=dict.Length()-1 ) dict.Append(".");
TString dicth = dict;
TString dictObj = dict;
dict += extension;
dicth += "h";
dictObj += fObjExt;
// Generate a linkdef file
TString linkdef = tmpnam(0);
linkdef += "linkdef.h";
ofstream linkdefFile( linkdef, ios::out );
linkdefFile << "// File Automatically generated by the ROOT Script Compiler " << endl;
linkdefFile << endl;
linkdefFile << "#ifdef __CINT__" << endl;
linkdefFile << endl;
linkdefFile << "#pragma link off all globals;" << endl;
linkdefFile << "#pragma link off all classes;" << endl;
linkdefFile << "#pragma link off all functions;" << endl;
linkdefFile << "#pragma link C++ nestedclasses;" << endl;
linkdefFile << "#pragma link C++ nestedtypedefs;" << endl;
linkdefFile << endl;
// We want to look for a header file that has the same name as the macro
// First lets get the include directory list in the dir1:dir2:dir3 format
TString incPath = GetIncludePath(); // of the form -Idir1 -Idir2 -Idir3
incPath.Append(":").Prepend(" ");
incPath.ReplaceAll(" -I",":"); // of form :dir1 :dir2:dir3
while ( incPath.Index(" :") != -1 ) {
incPath.ReplaceAll(" :",":");
}
incPath.Prepend(".:");
const char * extensions[] = { ".h", ".hh", ".hpp", ".hxx", ".hPP", ".hXX" };
for ( int i = 0; i < 6; i++ ) {
char * name;
TString lookup = libname;
lookup.Append(extensions[i]);
name = Which(incPath,lookup);
if (name) {
linkdefFile << "#pragma link C++ defined_in "<<name<<";"<< endl;
delete name;
}
}
linkdefFile << "#pragma link C++ defined_in "<<filename << ";" << endl;
linkdefFile << endl;
linkdefFile << "#endif" << endl;
linkdefFile.close();
// Generate a command lines
TString rcint = "rootcint -f ";
rcint.Append(dict).Append(" -c -p ").Append(GetIncludePath()).Append(" ");
rcint.Append(filename).Append(" ").Append(linkdef);
TString cmd = fMakeSharedLib;
// Replace(cmd,filename,library);
// NOTE: may want to add code to allow for $SourceFiles to not be
// interpreted
// we do not add filename because it is already include in dicth !
// dict.Append(" ").Append(filename);
cmd.ReplaceAll("$SourceFiles",dict);
cmd.ReplaceAll("$ObjectFiles",dictObj);
cmd.ReplaceAll("$IncludePath",GetIncludePath());
cmd.ReplaceAll("$SharedLib",library);
cmd.ReplaceAll("$LinkedLibs",GetLibraries("","SDL"));
cmd.ReplaceAll("$LibName",libname);
TString testcmd = fMakeExe;
TString fakeMain = tmpnam(0);
fakeMain += extension;
ofstream fakeMainFile( fakeMain, ios::out );
fakeMainFile << "// File Automatically generated by the ROOT Script Compiler " << endl;
fakeMainFile << "int main(char*argc,char**argvv) {};" << endl;
fakeMainFile.close();
// We could append this fake main routine to the compilation line.
// But in this case compiler may output the name of the dictionary file
// and of the fakeMain file while it compiles it. (this would be useless
// confusing output).
// We could also the fake main routine to the end of the dictionnary file
// however compilation would fail if a main is already there
// (like stress.cxx)
// dict.Append(" ").Append(fakeMain);
TString exec = tmpnam(0);
testcmd.ReplaceAll("$SourceFiles",dict);
testcmd.ReplaceAll("$ObjectFiles",dictObj);
testcmd.ReplaceAll("$IncludePath",GetIncludePath());
testcmd.ReplaceAll("$ExeName",exec);
testcmd.ReplaceAll("$LinkedLibs",GetLibraries("","SDL"));
// Run the build
int result = !gSystem->Exec(rcint);
if (result) result = !gSystem->Exec( cmd );
if ( result ) {
if (!keep) fCompiled->Add(new TObjString( library ));
#ifndef NOCINT
// This is intended to force a failure if not all symbols needed
// by the library are present.
G__Set_RTLD_NOW();
#endif
result = !gSystem->Load(library);
#ifndef NOCINT
G__Set_RTLD_LAZY();
#endif
if ( !result ) {
// Try to output unresolved symbols
gSystem->Exec(testcmd);
gSystem->Unlink( exec );
}
};
if (gDebug>3) {
rcint.Prepend("echo ");
cmd.Prepend("echo " ").Append(" " ");
testcmd.Prepend("echo " ").Append(" " ");
gSystem->Exec(rcint);
gSystem->Exec( cmd );
gSystem->Exec(testcmd);
} else {
gSystem->Unlink( dict );
gSystem->Unlink( dicth );
gSystem->Unlink( dictObj );
gSystem->Unlink( linkdef );
gSystem->Unlink( fakeMain );
gSystem->Unlink( exec );
}
return result;
}
//______________________________________________________________________________
const char *TSystem::GetMakeSharedLib() const
{
return fMakeSharedLib;
}
//______________________________________________________________________________
const char *TSystem::GetMakeExe() const
{
return fMakeExe;
}
//______________________________________________________________________________
const char *TSystem::GetIncludePath()
{
fListPaths = fIncludePath;
fListPaths.Append(" ").Append(gInterpreter->GetIncludePath());
return fListPaths;
}
//______________________________________________________________________________
const char *TSystem::GetLinkedLibs() const
{
return fLinkedLibs;
}
//______________________________________________________________________________
const char *TSystem::GetSoExt() const
{
return fSoExt;
}
//______________________________________________________________________________
const char *TSystem::GetObjExt() const
{
return fObjExt;
}
//______________________________________________________________________________
void TSystem::SetMakeExe(const char *directives)
{
// Directives has the same syntax as the argument of SetMakeSharedLib but is
// used to create an executable. This creation is used as a means to output
// a list of unresolved symbols, when loading a shared library has failed.
// The required variable is $ExeName rather than $SharedLib, e.g.:
// gSystem->SetMakeExe(
// "g++ -Wall -fPIC -DR__GLIBC $IncludePath $SourceFiles
// -o $ExeName $LinkedLibs -L/usr/X11R6/lib -lX11 -lm -ldl -rdynamic");
fMakeExe = directives;
// NOTE: add verification that the directives has the required variables
}
//______________________________________________________________________________
void TSystem::SetMakeSharedLib(const char *directives)
{
// Directives should contain the description on how to compile and link a
// shared lib. This description can be any valid shell command, including
// the use of ';' to separate several instructions. However, shell specific
// construct should be avoided. In particular this description can contain
// environment variables, like $ROOTSYS (or %ROOTSYS% on windows).
//
// Five special variables will be expanded before execution:
// Variable name Expands to
// ------------- ----------
// $SourceFiles Name of source files to be compiled
// $SharedLib Name of the shared library being created
// $LibName Name of shared library without extension
// $IncludePath value of fIncludePath
// $LinkedLibs value of fLinkedLibs
// $ObjectFiles Name of source files to be compiler with
// their extension changed to .o or .obj
// e.g.:
// gSystem->SetMakeSharedLib(
// "KCC -n32 --strict $IncludePath -K0 -O0 -g $SourceFile
// --no_exceptions --signed_chars --display_error_number
// --diag_suppress 68 -o $SharedLib");
//
// gSystem->setMakeSharedLib(
// "Cxx $IncludePath -c $SourceFile;
// ld -L/usr/lib/cmplrs/cxx -rpath /usr/lib/cmplrs/cxx -expect_unresolved
// -g0 -O1 -shared /usr/lib/cmplrs/cc/crt0.o /usr/lib/cmplrs/cxx/_main.o
// -o $SharedLib $ObjectFile -lcxxstd -lcxx -lexc -lots -lc"
//
// gSystem->SetMakeSharedLib(
// "$HOME/mygcc/bin/g++ -Wall -fPIC -DR__GLIBC $IncludePath $SourceFile
// -shared -o $SharedLib");
//
// gSystem->SetMakeSharedLib(
// "cl -DWIN32 -D_WIN32 -D_MT -D_DLL -MD /O2 /G5 /MD -DWIN32
// -DVISUAL_CPLUSPLUS -D_WINDOWS $IncludePath $SourceFile
// /link -PDB:NONE /NODEFAULTLIB /INCREMENTAL:NO /RELEASE /NOLOGO
// $LinkedLibs -entry:_DllMainCRTStartup@12 -dll /out:$SharedLib")
fMakeSharedLib = directives;
// NOTE: add verification that the directives has the required variables
}
//______________________________________________________________________________
void TSystem::SetIncludePath(const char *IncludePath)
{
// IncludePath should contain the list of compiler flags to indicate where
// to find user defined header files. It is used to expand $IncludePath in
// the directives given to SetMakeSharedLib() and SetMakeExe(), e.g.:
// gSystem->SetInclude("-I$ROOTSYS/include -Imydirectory/include");
// the default value of IncludePath on Unix is:
// "-I$ROOTSYS/include "
// and on Windows:
// "/I%ROOTSYS%/include "
fIncludePath = IncludePath;
}
//______________________________________________________________________________
void TSystem::SetLinkedLibs(const char *LinkedLibs)
{
// LinkedLibs should contain the library directory and list of libraries
// needed to recreate the current executable. It is used to expand $LinkedLibs
// in the directives given to SetMakeSharedLib() and SetMakeExe()
// The default value on Unix is: root-config --glibs
fLinkedLibs = LinkedLibs;
}
//______________________________________________________________________________
void TSystem::SetSoExt(const char *SoExt)
{
// Set shared library extension, should be either .so, .sl, .a, .dll, etc.
fSoExt = SoExt;
}
//______________________________________________________________________________
void TSystem::SetObjExt(const char *ObjExt)
{
// Set object files extension, should be either .o, .obj, etc.
fObjExt = ObjExt;
}
//______________________________________________________________________________
void TSystem::CleanCompiledMacros()
{
// Remove the shared libs produced by the CompileMacro() function.
TIter next(fCompiled);
TObjString *lib;
while ((lib = (TObjString*)next()))
Unlink(lib->GetString().Data());
}
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