/usr/include/root/TSystem.h is in libroot-core-dev 5.34.00-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// 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. *
*************************************************************************/
#ifndef ROOT_TSystem
#define ROOT_TSystem
//////////////////////////////////////////////////////////////////////////
// //
// TSystem //
// //
// Abstract base class defining a generic interface to the underlying //
// Operating System. //
// //
//////////////////////////////////////////////////////////////////////////
#ifndef __CINT__
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#ifndef WIN32
#include <unistd.h>
#endif
#endif
#ifndef ROOT_TNamed
#include "TNamed.h"
#endif
#ifndef ROOT_TString
#include "TString.h"
#endif
#ifndef ROOT_TInetAddress
#include "TInetAddress.h"
#endif
#ifndef ROOT_TTimer
#include "TTimer.h"
#endif
class TSeqCollection;
class TFdSet;
class TVirtualMutex;
enum EAccessMode {
kFileExists = 0,
kExecutePermission = 1,
kWritePermission = 2,
kReadPermission = 4
};
enum ELogOption {
kLogPid = 0x01,
kLogCons = 0x02
};
enum ELogLevel {
kLogEmerg = 0,
kLogAlert = 1,
kLogCrit = 2,
kLogErr = 3,
kLogWarning = 4,
kLogNotice = 5,
kLogInfo = 6,
kLogDebug = 7
};
enum ELogFacility {
kLogLocal0,
kLogLocal1,
kLogLocal2,
kLogLocal3,
kLogLocal4,
kLogLocal5,
kLogLocal6,
kLogLocal7
};
enum ESysConstants {
kMAXSIGNALS = 15,
kMAXPATHLEN = 8192,
kBUFFERSIZE = 8192,
kItimerResolution = 10 // interval-timer resolution in ms
};
enum EFpeMask {
kNoneMask = 0x00,
kInvalid = 0x01, // Invalid argument
kDivByZero = 0x02, // Division by zero
kOverflow = 0x04, // Overflow
kUnderflow = 0x08, // Underflow
kInexact = 0x10, // Inexact
kDefaultMask = 0x07,
kAllMask = 0x1F
};
enum EFileModeMask {
kS_IFMT = 0170000, // bitmask for the file type bitfields
kS_IFSOCK = 0140000, // socket
kS_IFLNK = 0120000, // symbolic link
kS_IFOFF = 0110000, // offline file
kS_IFREG = 0100000, // regular file
kS_IFBLK = 0060000, // block device
kS_IFDIR = 0040000, // directory
kS_IFCHR = 0020000, // character device
kS_IFIFO = 0010000, // fifo
kS_ISUID = 0004000, // set UID bit
kS_ISGID = 0002000, // set GID bit
kS_ISVTX = 0001000, // sticky bit
kS_IRWXU = 00700, // mask for file owner permissions
kS_IRUSR = 00400, // owner has read permission
kS_IWUSR = 00200, // owner has write permission
kS_IXUSR = 00100, // owner has execute permission
kS_IRWXG = 00070, // mask for group permissions
kS_IRGRP = 00040, // group has read permission
kS_IWGRP = 00020, // group has write permission
kS_IXGRP = 00010, // group has execute permission
kS_IRWXO = 00007, // mask for permissions for others (not in group)
kS_IROTH = 00004, // others have read permission
kS_IWOTH = 00002, // others have write permisson
kS_IXOTH = 00001 // others have execute permission
};
inline Bool_t R_ISDIR(Int_t mode) { return ((mode & kS_IFMT) == kS_IFDIR); }
inline Bool_t R_ISCHR(Int_t mode) { return ((mode & kS_IFMT) == kS_IFCHR); }
inline Bool_t R_ISBLK(Int_t mode) { return ((mode & kS_IFMT) == kS_IFBLK); }
inline Bool_t R_ISREG(Int_t mode) { return ((mode & kS_IFMT) == kS_IFREG); }
inline Bool_t R_ISLNK(Int_t mode) { return ((mode & kS_IFMT) == kS_IFLNK); }
inline Bool_t R_ISFIFO(Int_t mode) { return ((mode & kS_IFMT) == kS_IFIFO); }
inline Bool_t R_ISSOCK(Int_t mode) { return ((mode & kS_IFMT) == kS_IFSOCK); }
inline Bool_t R_ISOFF(Int_t mode) { return ((mode & kS_IFMT) == kS_IFOFF); }
struct FileStat_t {
Long_t fDev; // device id
Long_t fIno; // inode
Int_t fMode; // protection (combination of EFileModeMask bits)
Int_t fUid; // user id of owner
Int_t fGid; // group id of owner
Long64_t fSize; // total size in bytes
Long_t fMtime; // modification date
Bool_t fIsLink; // symbolic link
TString fUrl; // end point url of file
FileStat_t() : fDev(0), fIno(0), fMode(0), fUid(0), fGid(0), fSize(0),
fMtime(0), fIsLink(kFALSE), fUrl("") { }
};
struct UserGroup_t {
Int_t fUid; // user id
Int_t fGid; // group id
TString fUser; // user name
TString fGroup; // group name
TString fPasswd; // password
TString fRealName; // user full name
TString fShell; // user preferred shell
UserGroup_t() : fUid(0), fGid(0), fUser(), fGroup(), fPasswd(),
fRealName (), fShell() { }
};
struct SysInfo_t {
TString fOS; // OS
TString fModel; // computer model
TString fCpuType; // type of cpu
Int_t fCpus; // number of cpus
Int_t fCpuSpeed; // cpu speed in MHz
Int_t fBusSpeed; // bus speed in MHz
Int_t fL2Cache; // level 2 cache size in KB
Int_t fPhysRam; // physical RAM in MB
SysInfo_t() : fOS(), fModel(), fCpuType(), fCpus(0), fCpuSpeed(0),
fBusSpeed(0), fL2Cache(0), fPhysRam(0) { }
virtual ~SysInfo_t() { }
ClassDef(SysInfo_t, 1); // System information - OS, CPU, RAM.
};
struct CpuInfo_t {
Float_t fLoad1m; // cpu load average over 1 m
Float_t fLoad5m; // cpu load average over 5 m
Float_t fLoad15m; // cpu load average over 15 m
Float_t fUser; // cpu user load in percentage
Float_t fSys; // cpu sys load in percentage
Float_t fTotal; // cpu user+sys load in percentage
Float_t fIdle; // cpu idle percentage
CpuInfo_t() : fLoad1m(0), fLoad5m(0), fLoad15m(0),
fUser(0), fSys(0), fTotal(0), fIdle(0) { }
virtual ~CpuInfo_t() { }
ClassDef(CpuInfo_t, 1); // CPU load information.
};
struct MemInfo_t {
Int_t fMemTotal; // total RAM in MB
Int_t fMemUsed; // used RAM in MB
Int_t fMemFree; // free RAM in MB
Int_t fSwapTotal; // total swap in MB
Int_t fSwapUsed; // used swap in MB
Int_t fSwapFree; // free swap in MB
MemInfo_t() : fMemTotal(0), fMemUsed(0), fMemFree(0),
fSwapTotal(0), fSwapUsed(0), fSwapFree(0) { }
virtual ~MemInfo_t() { }
ClassDef(MemInfo_t, 1); // Memory utilization information.
};
struct ProcInfo_t {
Float_t fCpuUser; // user time used by this process in seconds
Float_t fCpuSys; // system time used by this process in seconds
Long_t fMemResident; // resident memory used by this process in KB
Long_t fMemVirtual; // virtual memory used by this process in KB
ProcInfo_t() : fCpuUser(0), fCpuSys(0), fMemResident(0),
fMemVirtual(0) { }
virtual ~ProcInfo_t() { }
ClassDef(ProcInfo_t, 1);// System resource usage of given process.
};
struct RedirectHandle_t {
TString fFile; // File where the output was redirected
TString fStdOutTty; // tty associated with stdout, if any (e.g. from ttyname(...))
TString fStdErrTty; // tty associated with stderr, if any (e.g. from ttyname(...))
Int_t fStdOutDup; // Duplicated descriptor for stdout
Int_t fStdErrDup; // Duplicated descriptor for stderr
Int_t fReadOffSet; // Offset where to start reading the file (used by ShowOutput(...))
RedirectHandle_t(const char *n = 0) : fFile(n), fStdOutTty(), fStdErrTty(), fStdOutDup(-1),
fStdErrDup(-1), fReadOffSet(-1) { }
void Reset() { fFile = ""; fStdOutTty = ""; fStdErrTty = "";
fStdOutDup = -1; fStdErrDup = -1; fReadOffSet = -1; }
};
#ifdef __CINT__
typedef void *Func_t;
#else
typedef void ((*Func_t)());
#endif
R__EXTERN const char *gRootDir;
R__EXTERN const char *gProgName;
R__EXTERN const char *gProgPath;
R__EXTERN TVirtualMutex *gSystemMutex;
//////////////////////////////////////////////////////////////////////////
// //
// Asynchronous timer used for processing pending GUI and timer events //
// every delay ms. Call in a tight computing loop //
// TProcessEventTimer::ProcessEvent(). If the timer did timeout this //
// call will process the pending events and return kTRUE if the //
// TROOT::IsInterrupted() flag is set (can be done by hitting key in //
// canvas or selecting canvas menu item View/Interrupt. //
// //
//////////////////////////////////////////////////////////////////////////
class TProcessEventTimer : public TTimer {
public:
TProcessEventTimer(Long_t delay);
Bool_t Notify() { return kTRUE; }
Bool_t ProcessEvents();
ClassDef(TProcessEventTimer,0) // Process pending events at fixed time intervals
};
class TSystem : public TNamed {
public:
enum EAclicMode { kDefault, kDebug, kOpt };
enum EAclicProperties {
kFlatBuildDir = BIT(0) // If set and a BuildDir is selected, then do not created subdirectories
};
protected:
TFdSet *fReadmask; //!Files that should be checked for read events
TFdSet *fWritemask; //!Files that should be checked for write events
TFdSet *fReadready; //!Files with reads waiting
TFdSet *fWriteready; //!Files with writes waiting
TFdSet *fSignals; //!Signals that were trapped
Int_t fNfd; //Number of fd's in masks
Int_t fMaxrfd; //Largest fd in read mask
Int_t fMaxwfd; //Largest fd in write mask
Int_t fSigcnt; //Number of pending signals
TString fWdpath; //Working directory
TString fHostname; //Hostname
Bool_t fInsideNotify; //Used by DispatchTimers()
Int_t fBeepFreq; //Used by Beep()
Int_t fBeepDuration; //Used by Beep()
Bool_t fInControl; //True if in eventloop
Bool_t fDone; //True if eventloop should be finished
Int_t fLevel; //Level of nested eventloops
TString fLastErrorString; //Last system error message
TSeqCollection *fTimers; //List of timers
TSeqCollection *fSignalHandler; //List of signal handlers
TSeqCollection *fFileHandler; //List of file handlers
TSeqCollection *fStdExceptionHandler; //List of std::exception handlers
TSeqCollection *fOnExitList; //List of items to be cleaned-up on exit
TString fListLibs; //List shared libraries, cache used by GetLibraries
TString fBuildArch; //Architecure for which ROOT was built (passed to ./configure)
TString fBuildCompiler; // Compiler used to build this ROOT
TString fBuildCompilerVersion; //Compiler version used to build this ROOT
TString fBuildNode; //Detailed information where ROOT was built
TString fBuildDir; //Location where to build ACLiC shared library and use as scratch area.
TString fFlagsDebug; //Flags for debug compilation
TString fFlagsOpt; //Flags for optimized compilation
TString fListPaths; //List of all include (fIncludePath + interpreter include path). Cache used by GetIncludePath
TString fIncludePath; //Used to expand $IncludePath in the directives given to SetMakeSharedLib and SetMakeExe
TString fLinkedLibs; //Used to expand $LinkedLibs in the directives given to SetMakeSharedLib and SetMakeExe
TString fSoExt; //Extension of shared library (.so, .sl, .a, .dll, etc.)
TString fObjExt; //Extension of object files (.o, .obj, etc.)
EAclicMode fAclicMode; //Whether the compilation should be done debug or opt
TString fMakeSharedLib; //Directive used to build a shared library
TString fMakeExe; //Directive used to build an executable
TString fLinkdefSuffix; //Default suffix for linkdef files to be used by ACLiC (see EACLiCProperties)
Int_t fAclicProperties; //Various boolean flag for change ACLiC's behavior.
TSeqCollection *fCompiled; //List of shared libs from compiled macros to be deleted
TSeqCollection *fHelpers; //List of helper classes for alternative file/directory access
TSystem *FindHelper(const char *path, void *dirptr = 0);
virtual Bool_t ConsistentWith(const char *path, void *dirptr = 0);
virtual const char *ExpandFileName(const char *fname);
virtual void SigAlarmInterruptsSyscalls(Bool_t) { }
virtual const char *GetLinkedLibraries();
virtual void DoBeep(Int_t /*freq*/=-1, Int_t /*duration*/=-1) const { printf("\a"); fflush(stdout); }
static const char *StripOffProto(const char *path, const char *proto) {
return !strncmp(path, proto, strlen(proto)) ? path + strlen(proto) : path;
}
private:
TSystem(const TSystem&); // not implemented
TSystem& operator=(const TSystem&); // not implemented
public:
TSystem(const char *name = "Generic", const char *title = "Generic System");
virtual ~TSystem();
//---- Misc
virtual Bool_t Init();
virtual void SetProgname(const char *name);
virtual void SetDisplay();
void SetErrorStr(const char *errstr);
const char *GetErrorStr() const { return fLastErrorString; }
virtual const char *GetError();
void RemoveOnExit(TObject *obj);
virtual const char *HostName();
virtual void NotifyApplicationCreated();
static Int_t GetErrno();
static void ResetErrno();
void Beep(Int_t freq=-1, Int_t duration=-1, Bool_t setDefault=kFALSE);
void GetBeepDefaults(Int_t &freq, Int_t &duration) const { freq = fBeepFreq; duration = fBeepDuration; }
//---- EventLoop
virtual void Run();
virtual Bool_t ProcessEvents();
virtual void DispatchOneEvent(Bool_t pendingOnly = kFALSE);
virtual void ExitLoop();
Bool_t InControl() const { return fInControl; }
virtual void InnerLoop();
virtual Int_t Select(TList *active, Long_t timeout);
virtual Int_t Select(TFileHandler *fh, Long_t timeout);
//---- Handling of system events
virtual void AddSignalHandler(TSignalHandler *sh);
virtual TSignalHandler *RemoveSignalHandler(TSignalHandler *sh);
virtual void ResetSignal(ESignals sig, Bool_t reset = kTRUE);
virtual void ResetSignals();
virtual void IgnoreSignal(ESignals sig, Bool_t ignore = kTRUE);
virtual void IgnoreInterrupt(Bool_t ignore = kTRUE);
virtual TSeqCollection *GetListOfSignalHandlers() const { return fSignalHandler; }
virtual void AddFileHandler(TFileHandler *fh);
virtual TFileHandler *RemoveFileHandler(TFileHandler *fh);
virtual TSeqCollection *GetListOfFileHandlers() const { return fFileHandler; }
virtual void AddStdExceptionHandler(TStdExceptionHandler *eh);
virtual TStdExceptionHandler *RemoveStdExceptionHandler(TStdExceptionHandler *eh);
virtual TSeqCollection *GetListOfStdExceptionHandlers() const { return fStdExceptionHandler; }
//---- Floating Point Exceptions Control
virtual Int_t GetFPEMask();
virtual Int_t SetFPEMask(Int_t mask = kDefaultMask);
//---- Time & Date
virtual TTime Now();
virtual TSeqCollection *GetListOfTimers() const { return fTimers; }
virtual void AddTimer(TTimer *t);
virtual TTimer *RemoveTimer(TTimer *t);
virtual void ResetTimer(TTimer *) { }
virtual Long_t NextTimeOut(Bool_t mode);
virtual void Sleep(UInt_t milliSec);
//---- Processes
virtual Int_t Exec(const char *shellcmd);
virtual FILE *OpenPipe(const char *command, const char *mode);
virtual int ClosePipe(FILE *pipe);
virtual TString GetFromPipe(const char *command);
virtual void Exit(int code, Bool_t mode = kTRUE);
virtual void Abort(int code = 0);
virtual int GetPid();
virtual void StackTrace();
//---- Directories
virtual int MakeDirectory(const char *name);
virtual void *OpenDirectory(const char *name);
virtual void FreeDirectory(void *dirp);
virtual const char *GetDirEntry(void *dirp);
virtual void *GetDirPtr() const { return 0; }
virtual Bool_t ChangeDirectory(const char *path);
virtual const char *WorkingDirectory();
virtual const char *HomeDirectory(const char *userName = 0);
virtual int mkdir(const char *name, Bool_t recursive = kFALSE);
Bool_t cd(const char *path) { return ChangeDirectory(path); }
const char *pwd() { return WorkingDirectory(); }
virtual const char *TempDirectory() const;
virtual FILE *TempFileName(TString &base, const char *dir = 0);
//---- Paths & Files
virtual const char *BaseName(const char *pathname);
virtual const char *DirName(const char *pathname);
virtual char *ConcatFileName(const char *dir, const char *name);
virtual Bool_t IsAbsoluteFileName(const char *dir);
virtual Bool_t IsFileInIncludePath(const char *name, char **fullpath = 0);
virtual const char *PrependPathName(const char *dir, TString& name);
virtual Bool_t ExpandPathName(TString &path);
virtual char *ExpandPathName(const char *path);
virtual Bool_t AccessPathName(const char *path, EAccessMode mode = kFileExists);
virtual Bool_t IsPathLocal(const char *path);
virtual int CopyFile(const char *from, const char *to, Bool_t overwrite = kFALSE);
virtual int Rename(const char *from, const char *to);
virtual int Link(const char *from, const char *to);
virtual int Symlink(const char *from, const char *to);
virtual int Unlink(const char *name);
int GetPathInfo(const char *path, Long_t *id, Long_t *size, Long_t *flags, Long_t *modtime);
int GetPathInfo(const char *path, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime);
virtual int GetPathInfo(const char *path, FileStat_t &buf);
virtual int GetFsInfo(const char *path, Long_t *id, Long_t *bsize, Long_t *blocks, Long_t *bfree);
virtual int Chmod(const char *file, UInt_t mode);
virtual int Umask(Int_t mask);
virtual int Utime(const char *file, Long_t modtime, Long_t actime);
virtual const char *UnixPathName(const char *unixpathname);
virtual const char *FindFile(const char *search, TString& file, EAccessMode mode = kFileExists);
virtual char *Which(const char *search, const char *file, EAccessMode mode = kFileExists);
virtual TList *GetVolumes(Option_t *) const { return 0; }
//---- Users & Groups
virtual Int_t GetUid(const char *user = 0);
virtual Int_t GetGid(const char *group = 0);
virtual Int_t GetEffectiveUid();
virtual Int_t GetEffectiveGid();
virtual UserGroup_t *GetUserInfo(Int_t uid);
virtual UserGroup_t *GetUserInfo(const char *user = 0);
virtual UserGroup_t *GetGroupInfo(Int_t gid);
virtual UserGroup_t *GetGroupInfo(const char *group = 0);
//---- Environment Manipulation
virtual void Setenv(const char *name, const char *value);
virtual void Unsetenv(const char *name);
virtual const char *Getenv(const char *env);
//---- System Logging
virtual void Openlog(const char *name, Int_t options, ELogFacility facility);
virtual void Syslog(ELogLevel level, const char *mess);
virtual void Closelog();
//---- Standard Output redirection
virtual Int_t RedirectOutput(const char *name, const char *mode = "a", RedirectHandle_t *h = 0);
virtual void ShowOutput(RedirectHandle_t *h);
//---- Dynamic Loading
virtual void AddDynamicPath(const char *pathname);
virtual const char *GetDynamicPath();
virtual void SetDynamicPath(const char *pathname);
virtual char *DynamicPathName(const char *lib, Bool_t quiet = kFALSE);
virtual Func_t DynFindSymbol(const char *module, const char *entry);
virtual int Load(const char *module, const char *entry = "", Bool_t system = kFALSE);
virtual void Unload(const char *module);
virtual void ListSymbols(const char *module, const char *re = "");
virtual void ListLibraries(const char *regexp = "");
virtual const char *GetLibraries(const char *regexp = "",
const char *option = "",
Bool_t isRegexp = kTRUE);
//---- RPC
virtual TInetAddress GetHostByName(const char *server);
virtual TInetAddress GetPeerName(int sock);
virtual TInetAddress GetSockName(int sock);
virtual int GetServiceByName(const char *service);
virtual char *GetServiceByPort(int port);
virtual int OpenConnection(const char *server, int port, int tcpwindowsize = -1, const char *protocol = "tcp");
virtual int AnnounceTcpService(int port, Bool_t reuse, int backlog, int tcpwindowsize = -1);
virtual int AnnounceUdpService(int port, int backlog);
virtual int AnnounceUnixService(int port, int backlog);
virtual int AnnounceUnixService(const char *sockpath, int backlog);
virtual int AcceptConnection(int sock);
virtual void CloseConnection(int sock, Bool_t force = kFALSE);
virtual int RecvRaw(int sock, void *buffer, int length, int flag);
virtual int SendRaw(int sock, const void *buffer, int length, int flag);
virtual int RecvBuf(int sock, void *buffer, int length);
virtual int SendBuf(int sock, const void *buffer, int length);
virtual int SetSockOpt(int sock, int kind, int val);
virtual int GetSockOpt(int sock, int kind, int *val);
//---- System, CPU and Memory info
virtual int GetSysInfo(SysInfo_t *info) const;
virtual int GetCpuInfo(CpuInfo_t *info, Int_t sampleTime = 1000) const;
virtual int GetMemInfo(MemInfo_t *info) const;
virtual int GetProcInfo(ProcInfo_t *info) const;
//---- ACLiC (Automatic Compiler of Shared Library for CINT)
virtual void AddIncludePath(const char *includePath);
virtual void AddLinkedLibs(const char *linkedLib);
virtual int CompileMacro(const char *filename, Option_t *opt="", const char* library_name = "", const char* build_dir = "", UInt_t dirmode = 0);
virtual Int_t GetAclicProperties() const;
virtual const char *GetBuildArch() const;
virtual const char *GetBuildCompiler() const;
virtual const char *GetBuildCompilerVersion() const;
virtual const char *GetBuildNode() const;
virtual const char *GetBuildDir() const;
virtual const char *GetFlagsDebug() const;
virtual const char *GetFlagsOpt() const;
virtual const char *GetIncludePath();
virtual const char *GetLinkedLibs() const;
virtual const char *GetLinkdefSuffix() const;
virtual EAclicMode GetAclicMode() const;
virtual const char *GetMakeExe() const;
virtual const char *GetMakeSharedLib() const;
virtual const char *GetSoExt() const;
virtual const char *GetObjExt() const;
virtual void SetBuildDir(const char* build_dir, Bool_t isflat = kFALSE);
virtual void SetFlagsDebug(const char *);
virtual void SetFlagsOpt(const char *);
virtual void SetIncludePath(const char *includePath);
virtual void SetMakeExe(const char *directives);
virtual void SetAclicMode(EAclicMode mode);
virtual void SetMakeSharedLib(const char *directives);
virtual void SetLinkedLibs(const char *linkedLibs);
virtual void SetLinkdefSuffix(const char *suffix);
virtual void SetSoExt(const char *soExt);
virtual void SetObjExt(const char *objExt);
virtual TString SplitAclicMode(const char *filename, TString &mode, TString &args, TString &io) const;
virtual void CleanCompiledMacros();
ClassDef(TSystem,0) //ABC defining a generic interface to the OS
};
R__EXTERN TSystem *gSystem;
R__EXTERN TFileHandler *gXDisplay; // Display server (X11) input event handler
#endif
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