/*********************************************************** 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. ******************************************************************/ /* dl module */ #include "Python.h" #include <dlfcn.h> #ifndef RTLD_LAZY #define RTLD_LAZY 1 #endif typedef ANY *PyUnivPtr; typedef struct { PyObject_HEAD PyUnivPtr *dl_handle; } dlobject; staticforward PyTypeObject Dltype; static PyObject *Dlerror; static PyObject * newdlobject(handle) PyUnivPtr *handle; { dlobject *xp; xp = PyObject_NEW(dlobject, &Dltype); if (xp == NULL) return NULL; xp->dl_handle = handle; return (PyObject *)xp; } static void dl_dealloc(xp) dlobject *xp; { if (xp->dl_handle != NULL) dlclose(xp->dl_handle); PyMem_DEL(xp); } static PyObject * dl_close(xp, args) dlobject *xp; PyObject *args; { if (!PyArg_Parse(args, "")) return NULL; if (xp->dl_handle != NULL) { dlclose(xp->dl_handle); xp->dl_handle = NULL; } Py_INCREF(Py_None); return Py_None; } static PyObject * dl_sym(xp, args) dlobject *xp; PyObject *args; { char *name; PyUnivPtr *func; if (!PyArg_Parse(args, "s", &name)) return NULL; func = dlsym(xp->dl_handle, name); if (func == NULL) { Py_INCREF(Py_None); return Py_None; } return PyInt_FromLong((long)func); } static PyObject * dl_call(xp, args) dlobject *xp; PyObject *args; /* (varargs) */ { PyObject *name; long (*func)(); long alist[10]; long res; int i; int n = PyTuple_Size(args); if (n < 1) { PyErr_SetString(PyExc_TypeError, "at least a name is needed"); return NULL; } name = PyTuple_GetItem(args, 0); if (!PyString_Check(name)) { PyErr_SetString(PyExc_TypeError, "function name must be a string"); return NULL; } func = dlsym(xp->dl_handle, PyString_AsString(name)); if (func == NULL) { PyErr_SetString(PyExc_ValueError, dlerror()); return NULL; } if (n-1 > 10) { PyErr_SetString(PyExc_TypeError, "too many arguments (max 10)"); return NULL; } for (i = 1; i < n; i++) { PyObject *v = PyTuple_GetItem(args, i); if (PyInt_Check(v)) alist[i-1] = PyInt_AsLong(v); else if (PyString_Check(v)) alist[i-1] = (long)PyString_AsString(v); else if (v == Py_None) alist[i-1] = (long) ((char *)NULL); else { PyErr_SetString(PyExc_TypeError, "arguments must be int, string or None"); return NULL; } } for (; i <= 10; i++) alist[i-1] = 0; res = (*func)(alist[0], alist[1], alist[2], alist[3], alist[4], alist[5], alist[6], alist[7], alist[8], alist[9]); return PyInt_FromLong(res); } static PyMethodDef dlobject_methods[] = { {"call", (PyCFunction)dl_call, 1 /* varargs */}, {"sym", (PyCFunction)dl_sym}, {"close", (PyCFunction)dl_close}, {NULL, NULL} /* Sentinel */ }; static PyObject * dl_getattr(xp, name) dlobject *xp; char *name; { return Py_FindMethod(dlobject_methods, (PyObject *)xp, name); } static PyTypeObject Dltype = { PyObject_HEAD_INIT(&PyType_Type) 0, /*ob_size*/ "dl", /*tp_name*/ sizeof(dlobject), /*tp_basicsize*/ 0, /*tp_itemsize*/ /* methods */ (destructor)dl_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ (getattrfunc)dl_getattr,/*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ }; static PyObject * dl_open(self, args) PyObject *self; PyObject *args; { char *name; int mode; PyUnivPtr *handle; if (PyArg_Parse(args, "z", &name)) mode = RTLD_LAZY; else { PyErr_Clear(); if (!PyArg_Parse(args, "(zi)", &name, &mode)) return NULL; #ifndef RTLD_NOW if (mode != RTLD_LAZY) { PyErr_SetString(PyExc_ValueError, "mode must be 1"); return NULL; } #endif } handle = dlopen(name, mode); if (handle == NULL) { PyErr_SetString(Dlerror, dlerror()); return NULL; } return newdlobject(handle); } static PyMethodDef dl_methods[] = { {"open", dl_open}, {NULL, NULL} /* sentinel */ }; void initdl() { PyObject *m, *d, *x; if (sizeof(int) != sizeof(long) || sizeof(long) != sizeof(char *)) { PyErr_SetString(PyExc_SystemError, "module dl requires sizeof(int) == sizeof(long) == sizeof(char*)"); return; } /* Create the module and add the functions */ m = Py_InitModule("dl", dl_methods); /* Add some symbolic constants to the module */ d = PyModule_GetDict(m); Dlerror = x = PyErr_NewException("dl.error", NULL, NULL); PyDict_SetItemString(d, "error", x); x = PyInt_FromLong((long)RTLD_LAZY); PyDict_SetItemString(d, "RTLD_LAZY", x); #ifdef RTLD_NOW x = PyInt_FromLong((long)RTLD_NOW); PyDict_SetItemString(d, "RTLD_NOW", x); #endif }