source3/lib/replace/dlfcn.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba system utilities
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 1998-2002
   6
   7      ** NOTE! The following LGPL license applies to the replace
   8      ** library. This does NOT imply that all of Samba is released
   9      ** under the LGPL
  10
  11    This library is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU Lesser General Public
  13    License as published by the Free Software Foundation; either
  14    version 3 of the License, or (at your option) any later version.
  15
  16    This library is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License for more details.
  20
  21    You should have received a copy of the GNU Lesser General Public
  22    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "replace.h"
  26 #ifdef HAVE_DL_H
  27 #include <dl.h>
  28 #endif
  29
  30 #ifndef HAVE_DLOPEN
  31 #ifdef DLOPEN_TAKES_UNSIGNED_FLAGS
  32 void *rep_dlopen(const char *name, unsigned int flags)
  33 #else
  34 void *rep_dlopen(const char *name, int flags)
  35 #endif
  36 {
  37 #ifdef HAVE_SHL_LOAD
  38         if (name == NULL)
  39                 return PROG_HANDLE;
  40         return (void *)shl_load(name, flags, 0);
  41 #else
  42         return NULL;
  43 #endif
  44 }
  45 #endif
  46
  47 #ifndef HAVE_DLSYM
  48 void *rep_dlsym(void *handle, const char *symbol)
  49 {
  50 #ifdef HAVE_SHL_FINDSYM
  51         void *sym_addr;
  52         if (!shl_findsym((shl_t *)&handle, symbol, TYPE_UNDEFINED, &sym_addr))
  53                 return sym_addr;
  54 #endif
  55     return NULL;
  56 }
  57 #endif
  58
  59 #ifndef HAVE_DLERROR
  60 char *rep_dlerror(void)
  61 {
  62         return "dynamic loading of objects not supported on this platform";
  63 }
  64 #endif
  65
  66 #ifndef HAVE_DLCLOSE
  67 int rep_dlclose(void *handle)
  68 {
  69 #ifdef HAVE_SHL_CLOSE
  70         return shl_unload((shl_t)handle);
  71 #else
  72         return 0;
  73 #endif
  74 }
  75 #endif