mirror of
https://github.com/python/cpython.git
synced 2025-10-25 02:43:41 +00:00
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/***********************************************************
|
|
Copyright (c) 2000, BeOpen.com.
|
|
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
|
|
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
|
|
All rights reserved.
|
|
|
|
See the file "Misc/COPYRIGHT" for information on usage and
|
|
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
|
******************************************************************/
|
|
|
|
/* 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;
|
|
}
|