XRootD
XrdOucN2NLoader.cc
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1 /******************************************************************************/
2 /* */
3 /* X r d O u c N 2 N L o a d e r . c c */
4 /* */
5 /* (c) 2012 by the Board of Trustees of the Leland Stanford, Jr., University */
6 /* All Rights Reserved */
7 /* Produced by Andrew Hanushevsky for Stanford University under contract */
8 /* DE-AC02-76-SFO0515 with the Department of Energy */
9 /* */
10 /* This file is part of the XRootD software suite. */
11 /* */
12 /* XRootD is free software: you can redistribute it and/or modify it under */
13 /* the terms of the GNU Lesser General Public License as published by the */
14 /* Free Software Foundation, either version 3 of the License, or (at your */
15 /* option) any later version. */
16 /* */
17 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
18 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
19 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
20 /* License for more details. */
21 /* */
22 /* You should have received a copy of the GNU Lesser General Public License */
23 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
24 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
25 /* */
26 /* The copyright holder's institutional names and contributor's names may not */
27 /* be used to endorse or promote products derived from this software without */
28 /* specific prior written permission of the institution or contributor. */
29 /******************************************************************************/
30 
31 #include <cerrno>
32 #include <unistd.h>
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 
36 #include "XrdVersion.hh"
37 #include "XrdOuc/XrdOucEnv.hh"
40 #include "XrdSys/XrdSysError.hh"
41 #include "XrdSys/XrdSysPlugin.hh"
42 
43 /******************************************************************************/
44 /* L o a d */
45 /******************************************************************************/
46 
48  XrdVersionInfo &urVer,
49  XrdOucEnv *envP)
50 {
53  static XrdVERSIONINFODEF (myVer, XrdN2N, XrdVNUMBER, XrdVERSION);
54  XrdOucName2Name *n2nP;
55  XrdOucName2NameVec *n2nV;
56 
57 // Use the default mapping if there is no library. Verify version numbers
58 // as we are normally in a different shared library.
59 //
60  if (!libName)
61  {if (!XrdSysPlugin::VerCmp(urVer, myVer)) return 0;
62  if (lclRoot)
63  {struct stat Stat;
64  if (stat(lclRoot, &Stat))
65  {eRoute->Emsg("N2N", errno, "use localroot", lclRoot);
66  return 0;
67  }
68  if (!S_ISDIR(Stat.st_mode))
69  {eRoute->Emsg("N2N", ENOTDIR, "use localroot", lclRoot);
70  return 0;
71  }
72  XrdOucEnv::Export("XRDLCLROOT", lclRoot);
73  }
74  if (rmtRoot) XrdOucEnv::Export("XRDRMTROOT", rmtRoot);
75  n2nP = XrdOucgetName2Name(eRoute, cFN, libParms, lclRoot, rmtRoot);
76  if (XrdOucN2NVec_P && envP)
77  envP->PutPtr("XrdOucName2NameVec*", XrdOucN2NVec_P);
78  return n2nP;
79  } else {
80  XrdOucEnv::Export("XRDN2NLIB", libName);
81  if (libParms) XrdOucEnv::Export("XRDN2NPARMS", libParms);
82  }
83 
84 // Get the entry point of the object creator
85 //
86  XrdOucPinLoader myLib(eRoute, &urVer, "namelib", libName);
87  ep = (XrdOucName2Name *(*)(XrdOucgetName2NameArgs))(myLib.Resolve("XrdOucgetName2Name"));
88  if (!ep) return 0;
89 
90 // Get the Object now
91 //
92  if ((n2nP = ep(eRoute, cFN, libParms, lclRoot, rmtRoot)) && envP)
93  {n2nV = (XrdOucName2NameVec *)myLib.Resolve("?Name2NameVec");
94  if (n2nV) envP->PutPtr("XrdOucName2NameVec*", n2nV);
95  }
96  return n2nP;
97 }
struct stat Stat
Definition: XrdCks.cc:49
XrdOucName2Name * XrdOucgetName2Name(XrdOucgetName2NameArgs)
XrdOucName2NameVec * XrdOucN2NVec_P
#define XrdOucgetName2NameArgs
int stat(const char *path, struct stat *buf)
static int Export(const char *Var, const char *Val)
Definition: XrdOucEnv.cc:188
void PutPtr(const char *varname, void *value)
Definition: XrdOucEnv.cc:316
XrdOucName2Name * Load(const char *libName, XrdVersionInfo &urVer, XrdOucEnv *envP=0)
XrdOucName2NameVec *Name2NameVec;.
void * Resolve(const char *symbl, int mcnt=1)
int Emsg(const char *esfx, int ecode, const char *text1, const char *text2=0)
Definition: XrdSysError.cc:95
static bool VerCmp(XrdVersionInfo &vInf1, XrdVersionInfo &vInf2, bool noMsg=false)
XrdVERSIONINFODEF(myVersion, cmsclient, XrdVNUMBER, XrdVERSION)
XrdOucEnv * envP
Definition: XrdPss.cc:109