pcsc-lite  1.8.11
dyn_unix.c
Go to the documentation of this file.
1 /*
2  * MUSCLE SmartCard Development ( http://pcsclite.alioth.debian.org/pcsclite.html )
3  *
4  * Copyright (C) 1999-2002
5  * David Corcoran <corcoran@musclecard.com>
6  * Copyright (C) 2002-2010
7  * Ludovic Rousseau <ludovic.rousseau@free.fr>
8  *
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions
11 are met:
12 
13 1. Redistributions of source code must retain the above copyright
14  notice, this list of conditions and the following disclaimer.
15 2. Redistributions in binary form must reproduce the above copyright
16  notice, this list of conditions and the following disclaimer in the
17  documentation and/or other materials provided with the distribution.
18 3. The name of the author may not be used to endorse or promote products
19  derived from this software without specific prior written permission.
20 
21 Changes to this license can be made only by the copyright author with
22 explicit written consent.
23 
24 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  *
35  * $Id: dyn_unix.c 6851 2014-02-14 15:43:32Z rousseau $
36  */
37 
43 #include "config.h"
44 #include <stdio.h>
45 #include <string.h>
46 #if defined(HAVE_DLFCN_H) && !defined(HAVE_DL_H) && !defined(__APPLE__)
47 #include <dlfcn.h>
48 #include <stdlib.h>
49 
50 #include "misc.h"
51 #include "pcsclite.h"
52 #include "debuglog.h"
53 #include "dyn_generic.h"
54 
55 INTERNAL int DYN_LoadLibrary(void **pvLHandle, char *pcLibrary)
56 {
57  *pvLHandle = NULL;
58 #ifndef PCSCLITE_STATIC_DRIVER
59  *pvLHandle = dlopen(pcLibrary, RTLD_LAZY);
60 
61  if (*pvLHandle == NULL)
62  {
63  Log3(PCSC_LOG_CRITICAL, "%s: %s", pcLibrary, dlerror());
64  return SCARD_F_UNKNOWN_ERROR;
65  }
66 #endif
67 
68  return SCARD_S_SUCCESS;
69 }
70 
71 INTERNAL int DYN_CloseLibrary(void **pvLHandle)
72 {
73 #ifndef PCSCLITE_STATIC_DRIVER
74  int ret;
75 
76  ret = dlclose(*pvLHandle);
77  *pvLHandle = NULL;
78 
79  if (ret)
80  {
81  Log2(PCSC_LOG_CRITICAL, "%s", dlerror());
82  return SCARD_F_UNKNOWN_ERROR;
83  }
84 #endif
85 
86  return SCARD_S_SUCCESS;
87 }
88 
89 INTERNAL int DYN_GetAddress(void *pvLHandle, void **pvFHandle,
90  const char *pcFunction, int mayfail)
91 {
92  char pcFunctionName[256];
93  int rv = SCARD_S_SUCCESS;
94 
95  /* Some platforms might need a leading underscore for the symbol */
96  (void)snprintf(pcFunctionName, sizeof(pcFunctionName), "_%s", pcFunction);
97 
98  *pvFHandle = NULL;
99 #ifndef PCSCLITE_STATIC_DRIVER
100  *pvFHandle = dlsym(pvLHandle, pcFunctionName);
101 
102  /* Failed? Try again without the leading underscore */
103  if (*pvFHandle == NULL)
104  *pvFHandle = dlsym(pvLHandle, pcFunction);
105 
106  if (*pvFHandle == NULL)
107  {
108  Log3(mayfail ? PCSC_LOG_INFO : PCSC_LOG_CRITICAL, "%s: %s",
109  pcFunction, dlerror());
111  }
112 #endif
113 
114  return rv;
115 }
116 
117 #endif /* HAVE_DLFCN_H && !HAVE_DL_H && !__APPLE__ */
This abstracts dynamic library loading functions.
#define SCARD_F_UNKNOWN_ERROR
An internal error has been detected, but the source is unknown.
Definition: pcsclite.h:126
This keeps a list of defines for pcsc-lite.
#define SCARD_S_SUCCESS
error codes from http://msdn.microsoft.com/en-us/library/aa924526.aspx
Definition: pcsclite.h:106
This handles debugging.