library: libCore #include "TNetFile.h" |
TNetSystem
class description - source file - inheritance tree (.pdf)
private:
virtual void* GetDirPtr() const
public:
TNetSystem()
TNetSystem(const char* url)
TNetSystem(const TNetSystem&)
virtual ~TNetSystem()
virtual Bool_t AccessPathName(const char* path, EAccessMode mode)
static TClass* Class()
virtual Bool_t ConsistentWith(const char* path, void* dirptr)
virtual void FreeDirectory(void* dirp = 0)
virtual const char* GetDirEntry(void* dirp = 0) const
virtual Int_t GetPathInfo(const char* path, FileStat_t& buf)
virtual TClass* IsA() const
virtual Int_t MakeDirectory(const char* name)
virtual void* OpenDirectory(const char* name)
TNetSystem& operator=(const TNetSystem&)
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
private:
Bool_t fDir true if a directory is open remotely
void* fDirp directory handler
TFTP* fFTP Connection to rootd
TString fHost Remote host
TString fUser Remote user
TNetFile
A TNetFile is like a normal TFile except that it reads and writes
its data via a rootd server (for more on the rootd daemon see the
source files root/rootd/src/*.cxx). TNetFile file names are in
standard URL format with protocol "root" or "roots". The following
are valid TNetFile URL's:
roots://hpsalo/files/aap.root
root://hpbrun.cern.ch/root/hsimple.root
root://pcna49a:5151/~na49/data/run821.root
root://pcna49d.cern.ch:5050//v1/data/run810.root
The only difference with the well known httpd URL's is that the root
of the remote file tree is the user's home directory. Therefore an
absolute pathname requires a // after the host or port specifier
(see last example). Further the expansion of the standard shell
characters, like ~, $, .., are handled as expected.
TNetFile (actually TUrl) uses 1094 as default port for rootd.
Connecting to a rootd requires the remote user id and password.
TNetFile allows three ways for you to provide your login:
1) Setting it globally via the static functions:
TAuthenticate::SetGlobalUser() and
TAuthenticate::SetGlobalPasswd()
2) Getting it from the ~/.netrc file (same file as used by ftp)
3) Command line prompt
The different methods will be tried in the order given above.
On machines with AFS rootd will authenticate using AFS (if it was
compiled with AFS support).
If the protocol is specified as "roots" a secure authetication
method will be used. The secure method uses the SRP, Secure Remote
Passwords, package. SRP uses a so called "asymmetric key exchange
protocol" in which no passwords are ever send over the wire. This
protocol is safe against all known security attacks. For more see:
NetFile
If the protocol is specified as "rootk" kerberos5 will be used for
authentication.
The rootd daemon lives in the directory $ROOTSYS/bin. It can be
started either via inetd or by hand from the command line (no need
to be super user). For more info about rootd see the web page:
NetFile
TNetSystem() : TSystem("-root", "Net file Helper System")
Create helper class that allows directory access via rootd.
TNetSystem(const char *url) : TSystem("-root", "Net file Helper System")
Create helper class that allows directory access via rootd.
~TNetSystem()
Dtor
Int_t MakeDirectory(const char *dir)
Make a directory via rootd.
void* OpenDirectory(const char *dir)
Open a directory via rfiod. Returns an opaque pointer to a dir
structure. Returns 0 in case of error.
void FreeDirectory(void *dirp)
Free directory via rootd.
const char* GetDirEntry(void *dirp)
Get directory entry via rootd. Returns 0 in case no more entries.
Int_t GetPathInfo(const char *path, FileStat_t &buf)
Get info about a file. Info is returned in the form of a FileStat_t
structure (see TSystem.h).
The function returns 0 in case of success and 1 if the file could
not be stat'ed.
Bool_t AccessPathName(const char *path, EAccessMode mode)
Returns FALSE if one can access a file using the specified access mode.
Mode is the same as for the Unix access(2) function.
Attention, bizarre convention of return value!!
Bool_t ConsistentWith(const char *path, void *dirptr)
Check consistency of this helper with the one required
by 'path' or 'dirptr'.
Inline Functions
void* GetDirPtr() const
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TNetSystem TNetSystem(const TNetSystem&)
TNetSystem& operator=(const TNetSystem&)
Author: Fons Rademakers 14/08/97
Last update: root/net:$Name: $:$Id: TNetFile.cxx,v 1.60 2005/03/11 11:06:18 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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