TUnixSystem.cxx File Reference

#include "RConfigure.h"
#include <ROOT/RConfig.hxx>
#include <ROOT/FoundationUtils.hxx>
#include "TUnixSystem.h"
#include "TROOT.h"
#include "TError.h"
#include "TOrdCollection.h"
#include "TRegexp.h"
#include "TPRegexp.h"
#include "TException.h"
#include "TEnv.h"
#include "Getline.h"
#include "TInterpreter.h"
#include "TApplication.h"
#include "TObjString.h"
#include "TVirtualMutex.h"
#include "ThreadLocalStorage.h"
#include "TObjArray.h"
#include "snprintf.h"
#include "strlcpy.h"
#include <iostream>
#include <fstream>
#include <map>
#include <algorithm>
#include <atomic>
#include <unistd.h>
#include <cstdlib>
#include <sys/types.h>
#include <sys/dir.h>
#include <sys/statfs.h>
#include <utime.h>
#include <syslog.h>
#include <sys/stat.h>
#include <csetjmp>
#include <csignal>
#include <sys/param.h>
#include <pwd.h>
#include <grp.h>
#include <cerrno>
#include <sys/resource.h>
#include <sys/wait.h>
#include <ctime>
#include <sys/time.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <netdb.h>
#include <fcntl.h>
#include <utmp.h>

Classes
struct	Signalmap_t
class	TFdSet
struct	TUtmpContent

Macros
#define	HOWMANY(x, y)
#define	REAL_DIR_ENTRY(dp)
#define	STRUCT_UTMP   struct utmp
#define	UTMP_FILE   "/etc/utmp"

Functions
static const char *	DynamicPath (const char *newpath=nullptr, Bool_t reset=kFALSE)
	Get shared library search path.
static const char *	GetExePath ()
static void	SigHandler (ESignals sig)
	Unix signal handler.
static void	sighandler (int sig)
	Call the signal handler associated with the signal.

Variables
static struct Signalmap_t	gSignalMap [kMAXSIGNALS]
const Int_t	kFDSETSIZE = 256
const Int_t	kNFDBITS = (sizeof(Long_t) * 8)
const char *	kProtocolName = "tcp"
const char *	kServerPath = "/tmp"
const char *	kShellMeta = "~*[]{}?$"

Macro Definition Documentation

HOWMANY

#define HOWMANY	(		x,
			y )

Value:

(((x)+((y)-1))/(y))

Definition at line 357 of file TUnixSystem.cxx.

REAL_DIR_ENTRY

#define REAL_DIR_ENTRY

(

dp

)

Value:

(dp->d_ino != 0)

Definition at line 3987 of file TUnixSystem.cxx.

STRUCT_UTMP

#define STRUCT_UTMP   struct utmp

Definition at line 178 of file TUnixSystem.cxx.

UTMP_FILE

#define UTMP_FILE   "/etc/utmp"

Definition at line 188 of file TUnixSystem.cxx.

Function Documentation

DynamicPath()

const char * DynamicPath ( const char * newpath = nullptr, Bool_t reset = kFALSE )

static

Get shared library search path.

Static utility function.

The runtime cost (syscalls) of this function can be shortened by injecting a pre-calculated result for the system library search path in form of export ROOT_LDSYSPATH=$(LD_DEBUG=libs LD_PRELOAD=DOESNOTEXIST ls /tmp/DOESNOTEXIST 2>&1 | grep -m 1 "system search path" | sed 's/.*=//g' | awk '//{print $1}') This might be useful in scenarios, where ROOT is instantiated many times.

Definition at line 4590 of file TUnixSystem.cxx.

GetExePath()

const char * GetExePath ( )

static

Definition at line 415 of file TUnixSystem.cxx.

SigHandler()

void SigHandler ( ESignals sig )

static

Unix signal handler.

Definition at line 407 of file TUnixSystem.cxx.

sighandler()

void sighandler ( int sig )

static

Call the signal handler associated with the signal.

Definition at line 3618 of file TUnixSystem.cxx.

Variable Documentation

gSignalMap

struct Signalmap_t gSignalMap[kMAXSIGNALS]

static

Initial value:

= {       
   { SIGBUS,   nullptr, nullptr, "bus error" }, 
   { SIGSEGV,  nullptr, nullptr, "segmentation violation" },
   { SIGSYS,   nullptr, nullptr, "bad argument to system call" },
   { SIGPIPE,  nullptr, nullptr, "write on a pipe with no one to read it" },
   { SIGILL,   nullptr, nullptr, "illegal instruction" },
   { SIGABRT,  nullptr, nullptr, "abort" },
   { SIGQUIT,  nullptr, nullptr, "quit" },
   { SIGINT,   nullptr, nullptr, "interrupt" },
   { SIGWINCH, nullptr, nullptr, "window size change" },
   { SIGALRM,  nullptr, nullptr, "alarm clock" },
   { SIGCHLD,  nullptr, nullptr, "death of a child" },
   { SIGURG,   nullptr, nullptr, "urgent data arrived on an I/O channel" },
   { SIGFPE,   nullptr, nullptr, "floating point exception" },
   { SIGTERM,  nullptr, nullptr, "termination signal" },
   { SIGUSR1,  nullptr, nullptr, "user-defined signal 1" },
   { SIGUSR2,  nullptr, nullptr, "user-defined signal 2" }
}

kFDSETSIZE

const Int_t kFDSETSIZE = 256

Definition at line 364 of file TUnixSystem.cxx.

kNFDBITS

const Int_t kNFDBITS = (sizeof(Long_t) * 8)

Definition at line 360 of file TUnixSystem.cxx.

kProtocolName

const char* kProtocolName = "tcp"

Definition at line 353 of file TUnixSystem.cxx.

kServerPath

const char* kServerPath = "/tmp"

Definition at line 352 of file TUnixSystem.cxx.

kShellMeta

const char* kShellMeta = "~*[]{}?$"

Definition at line 1711 of file TUnixSystem.cxx.