| /*********************************************************** |
| Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| The Netherlands. |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| provided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in |
| supporting documentation, and that the names of Stichting Mathematisch |
| Centrum or CWI or Corporation for National Research Initiatives or |
| CNRI not be used in advertising or publicity pertaining to |
| distribution of the software without specific, written prior |
| permission. |
| |
| While CWI is the initial source for this software, a modified version |
| is made available by the Corporation for National Research Initiatives |
| (CNRI) at the Internet address ftp://ftp.python.org. |
| |
| STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| PERFORMANCE OF THIS SOFTWARE. |
| |
| ******************************************************************/ |
| |
| /* Support for dynamic loading of extension modules */ |
| |
| #include "Python.h" |
| #include "importdl.h" |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #if defined(__NetBSD__) && (NetBSD < 199712) |
| #include <nlist.h> |
| #include <link.h> |
| #define dlerror() "error in dynamic linking" |
| #else |
| #ifdef HAVE_DLFCN_H |
| #include <dlfcn.h> |
| #endif |
| #endif |
| |
| #ifndef RTLD_LAZY |
| #define RTLD_LAZY 1 |
| #endif |
| |
| |
| const struct filedescr _PyImport_DynLoadFiletab[] = { |
| {".so", "rb", C_EXTENSION}, |
| {"module.so", "rb", C_EXTENSION}, |
| {0, 0} |
| }; |
| |
| static struct { |
| dev_t dev; |
| ino_t ino; |
| void *handle; |
| } handles[128]; |
| static int nhandles = 0; |
| |
| |
| dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname, |
| const char *pathname, FILE *fp) |
| { |
| dl_funcptr p; |
| void *handle; |
| char funcname[258]; |
| char pathbuf[260]; |
| |
| if (strchr(pathname, '/') == NULL) { |
| /* Prefix bare filename with "./" */ |
| sprintf(pathbuf, "./%-.255s", pathname); |
| pathname = pathbuf; |
| } |
| |
| /* ### should there be a leading underscore for some platforms? */ |
| sprintf(funcname, "init%.200s", shortname); |
| |
| if (fp != NULL) { |
| int i; |
| struct stat statb; |
| fstat(fileno(fp), &statb); |
| for (i = 0; i < nhandles; i++) { |
| if (statb.st_dev == handles[i].dev && |
| statb.st_ino == handles[i].ino) { |
| p = (dl_funcptr) dlsym(handles[i].handle, |
| funcname); |
| return p; |
| } |
| } |
| if (nhandles < 128) { |
| handles[nhandles].dev = statb.st_dev; |
| handles[nhandles].ino = statb.st_ino; |
| } |
| } |
| |
| #ifdef RTLD_NOW |
| /* RTLD_NOW: resolve externals now |
| (i.e. core dump now if some are missing) */ |
| handle = dlopen(pathname, RTLD_NOW); |
| #else |
| if (Py_VerboseFlag) |
| printf("dlopen(\"%s\", %d);\n", pathname, |
| RTLD_LAZY); |
| handle = dlopen(pathname, RTLD_LAZY); |
| #endif /* RTLD_NOW */ |
| if (handle == NULL) { |
| PyErr_SetString(PyExc_ImportError, dlerror()); |
| return NULL; |
| } |
| if (fp != NULL && nhandles < 128) |
| handles[nhandles++].handle = handle; |
| p = (dl_funcptr) dlsym(handle, funcname); |
| return p; |
| } |