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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:01:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:01:37 +0000 |
commit | de848d9e9146434817c65d74d1d0313e9d729462 (patch) | |
tree | dcbd0efb229b17f696f7195671f05b354b4f70fc /libpam/pam_dynamic.c | |
parent | Initial commit. (diff) | |
download | pam-de848d9e9146434817c65d74d1d0313e9d729462.tar.xz pam-de848d9e9146434817c65d74d1d0313e9d729462.zip |
Adding upstream version 1.4.0.upstream/1.4.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | libpam/pam_dynamic.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/libpam/pam_dynamic.c b/libpam/pam_dynamic.c new file mode 100644 index 0000000..c063083 --- /dev/null +++ b/libpam/pam_dynamic.c @@ -0,0 +1,138 @@ +/* + * 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 +} |