XRootD
XrdSysXAttr.cc
Go to the documentation of this file.
1 /******************************************************************************/
2 /* */
3 /* X r d S y s X A t t r . c c */
4 /* */
5 /* (c) 2014 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 <cstdio>
33 #include <cstdlib>
34 
35 #include "XrdSys/XrdSysError.hh"
36 #include "XrdSys/XrdSysXAttr.hh"
37 
38 /******************************************************************************/
39 /* C o p y */
40 /******************************************************************************/
41 
42 int XrdSysXAttr::Copy(const char *iPath, int iFD, const char *oPath, int oFD,
43  const char *Aname)
44 {
45  char *bP;
46  int sz, rc = 0;
47 
48 // Check if all attributes are to be copied. If so, do it.
49 //
50  if (!Aname)
51  {AList *aP = 0, *aNow;
52  char *Buff;
53  int maxSz;
54 
55  // Get all of the attributes for the input
56  //
57  if ((maxSz = List(&aP, iPath, iFD, 1)) <= 0)
58  return maxSz == 0 || maxSz == -ENOTSUP;
59 
60  // Allocate a buffer to hold the largest attribute value (plus some)
61  //
62  maxSz += 4096;
63  Buff = (char *)malloc(maxSz);
64 
65  // Get each value and set it
66  //
67  aNow = aP;
68  while(aNow && (rc = Get(aNow->Name, Buff, maxSz, iPath, iFD)) >= 0
69  && (rc = Set(aNow->Name, Buff, aNow->Vlen, oPath, oFD)) >= 0)
70  {aNow = aNow->Next;}
71 
72  // Free up resources and return
73  //
74  Free(aP);
75  free(Buff);
76  return rc;
77  }
78 
79 // First obtain the size of the attribute (if zero ignore it)
80 //
81  if ((sz = Get(Aname, 0, 0, iPath, iFD)) <= 0)
82  return (!sz || sz == -ENOTSUP ? 0 : sz);
83 
84 // Obtain storage
85 //
86  if (!(bP = (char *)malloc(sz)))
87  {if (Say)
88  {char eBuff[512];
89  snprintf(eBuff, sizeof(eBuff), "copy attr %s from", Aname);
90  Say->Emsg("XAttr", ENOMEM, eBuff, iPath);
91  }
92  return -ENOMEM;
93  }
94 
95 // Copy over any extended attributes
96 //
97  if ((rc = Get(Aname, bP, sz, iPath, iFD)) > 0)
98  {if ((rc = Set(Aname, bP, rc, oPath, oFD)) < 0 && rc == -ENOTSUP) rc = 0;}
99  else if (rc < 0 && rc == -ENOTSUP) rc = 0;
100 
101 // All done
102 //
103  free(bP);
104  return rc;
105 }
106 
107 /******************************************************************************/
108 /* S e t M s g R o u t e */
109 /******************************************************************************/
110 
112 {
113  XrdSysError *msgP = Say;
114  Say = errP;
115  return msgP;
116 }
int Emsg(const char *esfx, int ecode, const char *text1, const char *text2=0)
Definition: XrdSysError.cc:95
virtual int Copy(const char *iPath, int iFD, const char *oPath, int oFD, const char *Aname=0)
Definition: XrdSysXAttr.cc:42
virtual int List(AList **aPL, const char *Path, int fd=-1, int getSz=0)=0
XrdSysError * Say
Definition: XrdSysXAttr.hh:191
virtual int Get(const char *Aname, void *Aval, int Avsz, const char *Path, int fd=-1)=0
virtual int Set(const char *Aname, const void *Aval, int Avsz, const char *Path, int fd=-1, int isNew=0)=0
virtual void Free(AList *aPL)=0
AList * Next
-> next element.
Definition: XrdSysXAttr.hh:53
virtual XrdSysError * SetMsgRoute(XrdSysError *errP)
Definition: XrdSysXAttr.cc:111