/* Copyright 2009 Red Hat, Inc.
*
* This program is licensed under the BSD license, read LICENSE.BSD
* for further information
*/
#include "Python.h"
#include "marshal.h"
#include "cfile.h"
#include "deltarpm.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#if PY_MAJOR_VERSION >= 3
#define PyString_FromString PyBytes_FromString
#endif
PyObject *createDict(struct deltarpm d)
{
PyObject *dict;
PyObject *o;
dict = PyDict_New();
/* Old NEVR */
if (d.nevr) {
o = PyString_FromString(d.nevr);
PyDict_SetItemString(dict, "old_nevr", o);
Py_DECREF(o);
} else {
PyDict_SetItemString(dict, "old_nevr", Py_None);
}
/* New NEVR */
if (d.targetnevr) {
o = PyString_FromString(d.targetnevr);
PyDict_SetItemString(dict, "nevr", o);
Py_DECREF(o);
} else {
PyDict_SetItemString(dict, "nevr", Py_None);
}
/* Sequence */
if (d.seq) {
char *tmp = calloc(d.seql * 2 + 1, sizeof(char));
int i;
for (i = 0; i < d.seql; i++) {
char buf[3];
snprintf(buf, 3, "%02x", d.seq[i]);
strcat(tmp, buf);
}
o = PyString_FromString(tmp);
free(tmp);
PyDict_SetItemString(dict, "seq", o);
Py_DECREF(o);
} else {
PyDict_SetItemString(dict, "seq", Py_None);
}
return dict;
}
static PyObject *doRead(PyObject *s, PyObject *args)
{
char *filename;
struct deltarpm d;
PyObject *ret;
int pid;
int ipcpipe[2];
if (!PyArg_ParseTuple(args, "s", &filename)) {
PyErr_SetFromErrno(PyExc_SystemError);
return NULL;
}
/* The delta rpm code does not expect to be used in its way. Its error handling
* conststs of 'printf' and 'exit'. So, dirty hacks abound. */
if (pipe(ipcpipe) == -1) {
PyErr_SetFromErrno(PyExc_SystemError);
return NULL;
}
if ((pid = fork())) {
FILE *readend = fdopen(ipcpipe[0], "r");
int rc, status;
rc = waitpid(pid, &status, 0);
if (rc == -1 || (WIFEXITED(status) && WEXITSTATUS(status) != 0)) {
PyErr_SetFromErrno(PyExc_SystemError);
return NULL;
}
ret = PyMarshal_ReadObjectFromFile(readend);
fclose(readend);
} else {
FILE *writend = fdopen(ipcpipe[1], "w");
readdeltarpm(filename, &d, NULL);
PyMarshal_WriteObjectToFile(createDict(d), writend, Py_MARSHAL_VERSION);
fclose(writend);
_exit(0);
}
close(ipcpipe[1]);
return ret;
}
static PyMethodDef deltarpmMethods[] = {
{ "read", (PyCFunction) doRead, METH_VARARGS, NULL },
{ NULL }
};
#if PY_MAJOR_VERSION >= 3
static struct PyModuleDef moduledef = {
PyModuleDef_HEAD_INIT,
"_deltarpm", /* m_name */
NULL, /* m_doc */
0, /* m_size */
deltarpmMethods, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
NULL /* m_free */
};
PyObject * PyInit__deltarpm(void);
PyObject * PyInit__deltarpm(void)
{
return PyModule_Create(&moduledef);
}
#else
void init_deltarpm(void)
{
PyObject *m;
m = Py_InitModule("_deltarpm", deltarpmMethods);
}
#endif