mirror of
https://github.com/linux-pam/linux-pam.git
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8da7a655dd
Purpose of commit: Commit summary: --------------- submit missing files from last checkin
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* ALTERNATIVELY, this product may be distributed under the terms of
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* the GNU Public License, in which case the provisions of the GPL are
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* required INSTEAD OF the above restrictions. (This clause is
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* necessary due to a potential bad interaction between the GPL and
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* the restrictions contained in a BSD-style copyright.)
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "pam_private.h"
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#ifdef PAM_SHL
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# include <dl.h>
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#elif defined(PAM_DYLD)
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# include <mach-o/dyld.h>
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#else /* PAM_SHL */
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# include <dlfcn.h>
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#endif /* PAM_SHL */
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#include "pam_dynamic.h"
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#ifndef SHLIB_SYM_PREFIX
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#define SHLIB_SYM_PREFIX "_"
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#endif
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void *_pam_dlopen(const char *mod_path)
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{
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#ifdef PAM_SHL
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return shl_load(mod_path, BIND_IMMEDIATE, 0L);
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#elif defined(PAM_DYLD)
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NSObjectFileImage ofile;
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void *ret = NULL;
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if (NSCreateObjectFileImageFromFile(mod_path, &ofile) !=
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NSObjectFileImageSuccess )
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return NULL;
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ret = NSLinkModule(ofile, mod_path, NSLINKMODULE_OPTION_PRIVATE | NSLINKMODULE_OPTION_BINDNOW);
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NSDestroyObjectFileImage(ofile);
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return ret;
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#else
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return dlopen(mod_path, RTLD_NOW);
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#endif
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}
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servicefn _pam_dlsym(void *handle, const char *symbol)
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{
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#ifdef PAM_SHL
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char *_symbol = NULL;
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servicefn ret;
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if( symbol == NULL )
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return NULL;
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if( shl_findsym(&handle, symbol, (short) TYPE_PROCEDURE, &ret ){
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_symbol = malloc( strlen(symbol) + sizeof(SHLIB_SYM_PREFIX) + 1 );
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if( _symbol == NULL )
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return NULL;
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strcpy(_symbol, SHLIB_SYM_PREFIX);
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strcat(_symbol, symbol);
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if( shl_findsym(&handle, _symbol,
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(short) TYPE_PROCEDURE, &ret ){
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free(_symbol);
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return NULL;
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}
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free(_symbol);
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}
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return ret;
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#elif defined(PAM_DYLD)
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NSSymbol nsSymbol;
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char *_symbol;
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if( symbol == NULL )
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return NULL;
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_symbol = malloc( strlen(symbol) + 2 );
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if( _symbol == NULL )
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return NULL;
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strcpy(_symbol, SHLIB_SYM_PREFIX);
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strcat(_symbol, symbol);
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nsSymbol = NSLookupSymbolInModule(handle, _symbol);
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if( nsSymbol == NULL )
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return NULL;
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free(_symbol);
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return (servicefn)NSAddressOfSymbol(nsSymbol);
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#else
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return (servicefn) dlsym(handle, symbol);
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#endif
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}
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void _pam_dlclose(void *handle)
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{
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#ifdef PAM_SHL
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shl_unload(handle);
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#elif defined(PAM_DYLD)
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NSUnLinkModule((NSModule)handle, NSUNLINKMODULE_OPTION_NONE);
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#else
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dlclose(handle);
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#endif
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return;
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}
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const char *
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_pam_dlerror (void)
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{
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#if defined(PAM_SHL) || defined(PAM_DYLD)
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return "unknown";
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#else
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return dlerror ();
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#endif
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}
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