102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
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/* Support for dynamic loading of extension modules */
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#include "Python.h"
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#include "importdl.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#if defined(__NetBSD__) && (NetBSD < 199712)
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#include <nlist.h>
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#include <link.h>
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#define dlerror() "error in dynamic linking"
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#else
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#ifdef HAVE_DLFCN_H
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#include <dlfcn.h>
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#endif
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#endif
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#ifdef __OpenBSD__
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#define LEAD_UNDERSCORE "_"
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#else
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#define LEAD_UNDERSCORE ""
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#endif
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#ifndef RTLD_LAZY
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#define RTLD_LAZY 1
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#endif
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const struct filedescr _PyImport_DynLoadFiletab[] = {
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#ifdef __CYGWIN__
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{".dll", "rb", C_EXTENSION},
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{"module.dll", "rb", C_EXTENSION},
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#else
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{".so", "rb", C_EXTENSION},
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{"module.so", "rb", C_EXTENSION},
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#endif
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{0, 0}
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};
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static struct {
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dev_t dev;
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ino_t ino;
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void *handle;
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} handles[128];
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static int nhandles = 0;
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dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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const char *pathname, FILE *fp)
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{
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dl_funcptr p;
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void *handle;
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char funcname[258];
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char pathbuf[260];
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if (strchr(pathname, '/') == NULL) {
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/* Prefix bare filename with "./" */
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sprintf(pathbuf, "./%-.255s", pathname);
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pathname = pathbuf;
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}
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sprintf(funcname, LEAD_UNDERSCORE "init%.200s", shortname);
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if (fp != NULL) {
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int i;
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struct stat statb;
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fstat(fileno(fp), &statb);
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for (i = 0; i < nhandles; i++) {
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if (statb.st_dev == handles[i].dev &&
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statb.st_ino == handles[i].ino) {
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p = (dl_funcptr) dlsym(handles[i].handle,
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funcname);
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return p;
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}
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}
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if (nhandles < 128) {
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handles[nhandles].dev = statb.st_dev;
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handles[nhandles].ino = statb.st_ino;
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}
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}
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#ifdef RTLD_NOW
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/* RTLD_NOW: resolve externals now
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(i.e. core dump now if some are missing) */
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handle = dlopen(pathname, RTLD_NOW);
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#else
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if (Py_VerboseFlag)
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printf("dlopen(\"%s\", %d);\n", pathname,
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RTLD_LAZY);
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handle = dlopen(pathname, RTLD_LAZY);
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#endif /* RTLD_NOW */
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if (handle == NULL) {
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PyErr_SetString(PyExc_ImportError, dlerror());
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return NULL;
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}
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if (fp != NULL && nhandles < 128)
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handles[nhandles++].handle = handle;
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p = (dl_funcptr) dlsym(handle, funcname);
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return p;
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}
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