XRootD
XrdOucVerName.cc
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1 /******************************************************************************/
2 /* */
3 /* X r d O u c V e r N a m e . c c */
4 /* */
5 /* (c) 2014 by the Board of Trustees of the Leland Stanford, Jr., University */
6 /* Produced by Andrew Hanushevsky for Stanford University under contract */
7 /* DE-AC02-76-SFO0515 with the Department of Energy */
8 /* */
9 /* This file is part of the XRootD software suite. */
10 /* */
11 /* XRootD is free software: you can redistribute it and/or modify it under */
12 /* the terms of the GNU Lesser General Public License as published by the */
13 /* Free Software Foundation, either version 3 of the License, or (at your */
14 /* option) any later version. */
15 /* */
16 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
17 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
18 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
19 /* License for more details. */
20 /* */
21 /* You should have received a copy of the GNU Lesser General Public License */
22 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
23 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
24 /* */
25 /* The copyright holder's institutional names and contributor's names may not */
26 /* be used to endorse or promote products derived from this software without */
27 /* specific prior written permission of the institution or contributor. */
28 /******************************************************************************/
29 
30 #include <cstdio>
31 #include <cstdlib>
32 #include <cstring>
33 #include <strings.h>
34 
35 #include "XrdVersionPlugin.hh"
36 
37 #include "XrdOuc/XrdOucVerName.hh"
38 
39 /******************************************************************************/
40 /* S t a t i c s */
41 /******************************************************************************/
42 
43 namespace
44 {
45 static const char *StrictName[] = XrdVERSIONPLUGINSTRICT;
46 }
47 
48 /******************************************************************************/
49 /* h a s V e r s i o n */
50 /******************************************************************************/
51 
52 int XrdOucVerName::hasVersion(const char *piPath, char **piNoVN)
53 {
54  const char *Dash;
55 
56 // We check for an embeded version number. This is usually used to issue a
57 // warning that including a specific version disables automatic versioning.
58 // We only return an alternate name if the library is an official one.
59 //
60  if ((Dash = rindex(piPath, '-')))
61  {char *endP;
62  int vn = strtol(Dash+1, &endP, 10);
63  if (vn && !strcmp(endP, ".so"))
64  {if (piNoVN)
65  {char buff[2048];
66  snprintf(buff,sizeof(buff),"%.*s%s",int(Dash-piPath),piPath,endP);
67  if (isOurs(buff)) *piNoVN = strdup(buff);
68  else *piNoVN = 0;
69  }
70  return vn;
71  }
72  }
73  if (piNoVN) *piNoVN = 0;
74  return 0;
75 }
76 
77 /******************************************************************************/
78 /* Private: i s O u r s */
79 /******************************************************************************/
80 
81 bool XrdOucVerName::isOurs(const char *path)
82 {
83  const char *Slash = rindex(path, '/');
84 
85  Slash = (Slash ? Slash+1 : path);
86  int n = 0;
87  while(StrictName[n] && strcmp(Slash, StrictName[n])) n++;
88 
89  return (StrictName[n] != 0);
90 }
91 
92 /******************************************************************************/
93 /* V e r s i o n */
94 /******************************************************************************/
95 
96 int XrdOucVerName::Version(const char *piVers, const char *piPath, bool &noFBK,
97  char *buff, int blen)
98 {
99  const char *Dot, *Slash, *fName;
100  int n, pLen;
101 
102 // Find the markers in the passed path
103 //
104  if ((Slash = rindex(piPath, '/')))
105  {pLen = Slash-piPath+1; Dot = rindex(Slash+1, '.'); fName = Slash+1;}
106  else {pLen = 0; Dot = rindex(piPath, '.'); fName = piPath;}
107  if (Dot) pLen += Dot-fName;
108  else {pLen += strlen(fName); Dot = "";}
109 
110 // Test strict naming and return result
111 //
112  n = 0;
113  while(StrictName[n] && strcmp(fName, StrictName[n])) n++;
114  noFBK = (StrictName[n] != 0);
115 
116 // Format the versioned name
117 //
118  n = snprintf(buff, blen-1, "%.*s-%s%s", pLen, piPath, piVers, Dot);
119 
120 // Return result
121 //
122  return (n < blen ? n : 0);
123 }
#define XrdVERSIONPLUGINSTRICT
static int Version(const char *piVers, const char *piPath, bool &noFBK, char *buff, int blen)
static int hasVersion(const char *piPath, char **piNoVN=0)