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https://github.com/jart/cosmopolitan.git
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559b024e1d
We can now link even smaller Python binaries. For example, the hello.com program in the Python build directory is a compiled linked executable of hello.py which just prints hello world. Using decentralized sections, we can make that binary 1.9mb in size (noting that python.com is 6.3 megs!) This works for nontrivial programs too. For example, say we want an APE binary that's equivalent to python.com -m http.server. Our makefile now builds such a binary using the new launcher and it's only 3.2mb in size since Python sources get turned into ELF objects, which tell our linker that we need things like native hashing algorithm code.
284 lines
8 KiB
C
284 lines
8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/musl/passwd.h"
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#include "third_party/python/Include/abstract.h"
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#include "third_party/python/Include/bytesobject.h"
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#include "third_party/python/Include/dictobject.h"
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#include "third_party/python/Include/import.h"
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#include "third_party/python/Include/listobject.h"
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#include "third_party/python/Include/modsupport.h"
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#include "third_party/python/Include/object.h"
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#include "third_party/python/Include/pyerrors.h"
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#include "third_party/python/Include/pymacro.h"
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#include "third_party/python/Include/structseq.h"
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#include "third_party/python/Include/unicodeobject.h"
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#include "third_party/python/Include/warnings.h"
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#include "third_party/python/Include/yoink.h"
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#include "third_party/python/Modules/clinic/grpmodule.inc"
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#include "third_party/python/Modules/posixmodule.h"
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/* clang-format off */
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PYTHON_PROVIDE("grp");
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PYTHON_PROVIDE("grp.getgrall");
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PYTHON_PROVIDE("grp.getgrgid");
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PYTHON_PROVIDE("grp.getgrnam");
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PYTHON_PROVIDE("grp.struct_group");
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/* UNIX group file access module */
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/*[clinic input]
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module grp
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=cade63f2ed1bd9f8]*/
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static PyStructSequence_Field struct_group_type_fields[] = {
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{"gr_name", "group name"},
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{"gr_passwd", "password"},
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{"gr_gid", "group id"},
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{"gr_mem", "group members"},
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{0}
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};
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PyDoc_STRVAR(struct_group__doc__,
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"grp.struct_group: Results from getgr*() routines.\n\n\
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This object may be accessed either as a tuple of\n\
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(gr_name,gr_passwd,gr_gid,gr_mem)\n\
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or via the object attributes as named in the above tuple.\n");
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static PyStructSequence_Desc struct_group_type_desc = {
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"grp.struct_group",
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struct_group__doc__,
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struct_group_type_fields,
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4,
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};
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static int initialized;
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static PyTypeObject StructGrpType;
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static PyObject *
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mkgrent(struct group *p)
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{
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int setIndex = 0;
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PyObject *v = PyStructSequence_New(&StructGrpType), *w;
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char **member;
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if (v == NULL)
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return NULL;
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if ((w = PyList_New(0)) == NULL) {
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Py_DECREF(v);
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return NULL;
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}
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for (member = p->gr_mem; *member != NULL; member++) {
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PyObject *x = PyUnicode_DecodeFSDefault(*member);
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if (x == NULL || PyList_Append(w, x) != 0) {
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Py_XDECREF(x);
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Py_DECREF(w);
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Py_DECREF(v);
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return NULL;
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}
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Py_DECREF(x);
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}
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#define SET(i,val) PyStructSequence_SET_ITEM(v, i, val)
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SET(setIndex++, PyUnicode_DecodeFSDefault(p->gr_name));
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if (p->gr_passwd)
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SET(setIndex++, PyUnicode_DecodeFSDefault(p->gr_passwd));
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else {
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SET(setIndex++, Py_None);
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Py_INCREF(Py_None);
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}
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SET(setIndex++, _PyLong_FromGid(p->gr_gid));
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SET(setIndex++, w);
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#undef SET
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if (PyErr_Occurred()) {
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Py_DECREF(v);
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return NULL;
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}
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return v;
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}
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/*[clinic input]
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grp.getgrgid
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id: object
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Return the group database entry for the given numeric group ID.
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If id is not valid, raise KeyError.
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[clinic start generated code]*/
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static PyObject *
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grp_getgrgid_impl(PyObject *module, PyObject *id)
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/*[clinic end generated code: output=30797c289504a1ba input=15fa0e2ccf5cda25]*/
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{
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PyObject *py_int_id;
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gid_t gid;
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struct group *p;
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if (!_Py_Gid_Converter(id, &gid)) {
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if (!PyErr_ExceptionMatches(PyExc_TypeError)) {
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return NULL;
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}
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PyErr_Clear();
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if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
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"group id must be int, not %.200",
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id->ob_type->tp_name) < 0) {
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return NULL;
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}
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py_int_id = PyNumber_Long(id);
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if (!py_int_id)
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return NULL;
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if (!_Py_Gid_Converter(py_int_id, &gid)) {
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Py_DECREF(py_int_id);
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return NULL;
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}
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Py_DECREF(py_int_id);
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}
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if ((p = getgrgid(gid)) == NULL) {
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PyObject *gid_obj = _PyLong_FromGid(gid);
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if (gid_obj == NULL)
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return NULL;
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PyErr_Format(PyExc_KeyError, "getgrgid(): gid not found: %S", gid_obj);
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Py_DECREF(gid_obj);
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return NULL;
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}
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return mkgrent(p);
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}
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/*[clinic input]
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grp.getgrnam
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name: unicode
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Return the group database entry for the given group name.
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If name is not valid, raise KeyError.
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[clinic start generated code]*/
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static PyObject *
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grp_getgrnam_impl(PyObject *module, PyObject *name)
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/*[clinic end generated code: output=67905086f403c21c input=08ded29affa3c863]*/
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{
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char *name_chars;
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struct group *p;
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PyObject *bytes, *retval = NULL;
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if ((bytes = PyUnicode_EncodeFSDefault(name)) == NULL)
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return NULL;
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/* check for embedded null bytes */
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if (PyBytes_AsStringAndSize(bytes, &name_chars, NULL) == -1)
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goto out;
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if ((p = getgrnam(name_chars)) == NULL) {
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PyErr_Format(PyExc_KeyError, "getgrnam(): name not found: %R", name);
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goto out;
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}
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retval = mkgrent(p);
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out:
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Py_DECREF(bytes);
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return retval;
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}
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/*[clinic input]
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grp.getgrall
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Return a list of all available group entries, in arbitrary order.
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An entry whose name starts with '+' or '-' represents an instruction
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to use YP/NIS and may not be accessible via getgrnam or getgrgid.
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[clinic start generated code]*/
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static PyObject *
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grp_getgrall_impl(PyObject *module)
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/*[clinic end generated code: output=585dad35e2e763d7 input=d7df76c825c367df]*/
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{
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PyObject *d;
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struct group *p;
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if ((d = PyList_New(0)) == NULL)
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return NULL;
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setgrent();
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while ((p = getgrent()) != NULL) {
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PyObject *v = mkgrent(p);
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if (v == NULL || PyList_Append(d, v) != 0) {
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Py_XDECREF(v);
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Py_DECREF(d);
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endgrent();
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return NULL;
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}
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Py_DECREF(v);
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}
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endgrent();
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return d;
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}
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static PyMethodDef grp_methods[] = {
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GRP_GETGRGID_METHODDEF
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GRP_GETGRNAM_METHODDEF
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GRP_GETGRALL_METHODDEF
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{NULL, NULL}
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};
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PyDoc_STRVAR(grp__doc__,
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"Access to the Unix group database.\n\
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\n\
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Group entries are reported as 4-tuples containing the following fields\n\
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from the group database, in order:\n\
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\n\
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gr_name - name of the group\n\
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gr_passwd - group password (encrypted); often empty\n\
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gr_gid - numeric ID of the group\n\
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gr_mem - list of members\n\
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\n\
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The gid is an integer, name and password are strings. (Note that most\n\
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users are not explicitly listed as members of the groups they are in\n\
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according to the password database. Check both databases to get\n\
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complete membership information.)");
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static struct PyModuleDef grpmodule = {
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PyModuleDef_HEAD_INIT,
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"grp",
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grp__doc__,
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-1,
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grp_methods,
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NULL,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC
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PyInit_grp(void)
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{
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PyObject *m, *d;
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m = PyModule_Create(&grpmodule);
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if (m == NULL)
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return NULL;
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d = PyModule_GetDict(m);
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if (!initialized) {
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if (PyStructSequence_InitType2(&StructGrpType,
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&struct_group_type_desc) < 0)
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return NULL;
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}
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if (PyDict_SetItemString(d, "struct_group",
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(PyObject *)&StructGrpType) < 0)
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return NULL;
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initialized = 1;
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return m;
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}
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_Section(".rodata.pytab.1") const struct _inittab _PyImport_Inittab_grp = {
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"grp",
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PyInit_grp,
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};
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