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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "pam_private.h"
#ifdef PAM_SHL
# include <dl.h>
#elif defined(PAM_DYLD)
# include <mach-o/dyld.h>
#else /* PAM_SHL */
# include <dlfcn.h>
#endif /* PAM_SHL */
#ifndef SHLIB_SYM_PREFIX
#define SHLIB_SYM_PREFIX "_"
#endif
void *_pam_dlopen(const char *mod_path)
{
#ifdef PAM_SHL
return shl_load(mod_path, BIND_IMMEDIATE, 0L);
#elif defined(PAM_DYLD)
NSObjectFileImage ofile;
void *ret = NULL;
if (NSCreateObjectFileImageFromFile(mod_path, &ofile) !=
NSObjectFileImageSuccess )
return NULL;
ret = NSLinkModule(ofile, mod_path, NSLINKMODULE_OPTION_PRIVATE | NSLINKMODULE_OPTION_BINDNOW);
NSDestroyObjectFileImage(ofile);
return ret;
#else
return dlopen(mod_path, RTLD_NOW);
#endif
}
servicefn _pam_dlsym(void *handle, const char *symbol)
{
#ifdef PAM_SHL
char *_symbol = NULL;
servicefn ret;
if( symbol == NULL )
return NULL;
if( shl_findsym(&handle, symbol, (short) TYPE_PROCEDURE, &ret ){
_symbol = malloc( strlen(symbol) + sizeof(SHLIB_SYM_PREFIX) + 1 );
if( _symbol == NULL )
return NULL;
strcpy(_symbol, SHLIB_SYM_PREFIX);
strcat(_symbol, symbol);
if( shl_findsym(&handle, _symbol,
(short) TYPE_PROCEDURE, &ret ){
free(_symbol);
return NULL;
}
free(_symbol);
}
return ret;
#elif defined(PAM_DYLD)
NSSymbol nsSymbol;
char *_symbol;
if( symbol == NULL )
return NULL;
_symbol = malloc( strlen(symbol) + 2 );
if( _symbol == NULL )
return NULL;
strcpy(_symbol, SHLIB_SYM_PREFIX);
strcat(_symbol, symbol);
nsSymbol = NSLookupSymbolInModule(handle, _symbol);
if( nsSymbol == NULL )
return NULL;
free(_symbol);
return (servicefn)NSAddressOfSymbol(nsSymbol);
#else
return (servicefn) dlsym(handle, symbol);
#endif
}
void _pam_dlclose(void *handle)
{
#ifdef PAM_SHL
shl_unload(handle);
#elif defined(PAM_DYLD)
NSUnLinkModule((NSModule)handle, NSUNLINKMODULE_OPTION_NONE);
#else
dlclose(handle);
#endif
return;
}
const char *
_pam_dlerror (void)
{
#if defined(PAM_SHL) || defined(PAM_DYLD)
return "unknown";
#else
return dlerror ();
#endif
}
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