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eac0939ddd
Unlike the other facilities, we don't use a fallback for AUTHPRIV if it doesn't exist. Because it is intended for logging sensitive log messages, it is better that a program trying to log such messages fail than that it log them insecurely. Initial patch by Federico Reghenzani.
344 lines
10 KiB
C
344 lines
10 KiB
C
/***********************************************************
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Copyright 1994 by Lance Ellinghouse,
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Cathedral City, California Republic, United States of America.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Lance Ellinghouse
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not be used in advertising or publicity pertaining to distribution
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of the software without specific, written prior permission.
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LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE BE LIABLE FOR ANY SPECIAL,
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INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/******************************************************************
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Revision history:
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2010/04/20 (Sean Reifschneider)
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- Use basename(sys.argv[0]) for the default "ident".
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- Arguments to openlog() are now keyword args and are all optional.
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- syslog() calls openlog() if it hasn't already been called.
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1998/04/28 (Sean Reifschneider)
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- When facility not specified to syslog() method, use default from openlog()
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(This is how it was claimed to work in the documentation)
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- Potential resource leak of o_ident, now cleaned up in closelog()
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- Minor comment accuracy fix.
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95/06/29 (Steve Clift)
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- Changed arg parsing to use PyArg_ParseTuple.
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- Added PyErr_Clear() call(s) where needed.
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- Fix core dumps if user message contains format specifiers.
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- Change openlog arg defaults to match normal syslog behavior.
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- Plug memory leak in openlog().
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- Fix setlogmask() to return previous mask value.
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******************************************************************/
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/* syslog module */
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#include "Python.h"
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#include "osdefs.h"
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#include <syslog.h>
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/* only one instance, only one syslog, so globals should be ok */
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static PyObject *S_ident_o = NULL; /* identifier, held by openlog() */
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static char S_log_open = 0;
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static PyObject *
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syslog_get_argv(void)
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{
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/* Figure out what to use for as the program "ident" for openlog().
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* This swallows exceptions and continues rather than failing out,
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* because the syslog module can still be used because openlog(3)
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* is optional.
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*/
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Py_ssize_t argv_len, scriptlen;
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PyObject *scriptobj;
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Py_ssize_t slash;
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PyObject *argv = PySys_GetObject("argv");
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if (argv == NULL) {
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return(NULL);
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}
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argv_len = PyList_Size(argv);
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if (argv_len == -1) {
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PyErr_Clear();
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return(NULL);
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}
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if (argv_len == 0) {
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return(NULL);
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}
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scriptobj = PyList_GetItem(argv, 0);
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if (!PyUnicode_Check(scriptobj)) {
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return(NULL);
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}
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scriptlen = PyUnicode_GET_LENGTH(scriptobj);
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if (scriptlen == 0) {
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return(NULL);
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}
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slash = PyUnicode_FindChar(scriptobj, SEP, 0, scriptlen, -1);
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if (slash == -2)
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return NULL;
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if (slash != -1) {
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return PyUnicode_Substring(scriptobj, slash, scriptlen);
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} else {
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Py_INCREF(scriptobj);
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return(scriptobj);
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}
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return(NULL);
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}
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static PyObject *
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syslog_openlog(PyObject * self, PyObject * args, PyObject *kwds)
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{
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long logopt = 0;
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long facility = LOG_USER;
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PyObject *new_S_ident_o = NULL;
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static char *keywords[] = {"ident", "logoption", "facility", 0};
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char *ident = NULL;
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if (!PyArg_ParseTupleAndKeywords(args, kwds,
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"|Ull:openlog", keywords, &new_S_ident_o, &logopt, &facility))
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return NULL;
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if (new_S_ident_o) {
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Py_INCREF(new_S_ident_o);
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}
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/* get sys.argv[0] or NULL if we can't for some reason */
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if (!new_S_ident_o) {
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new_S_ident_o = syslog_get_argv();
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}
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Py_XDECREF(S_ident_o);
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S_ident_o = new_S_ident_o;
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/* At this point, S_ident_o should be INCREF()ed. openlog(3) does not
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* make a copy, and syslog(3) later uses it. We can't garbagecollect it
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* If NULL, just let openlog figure it out (probably using C argv[0]).
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*/
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if (S_ident_o) {
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ident = _PyUnicode_AsString(S_ident_o);
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if (ident == NULL)
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return NULL;
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}
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openlog(ident, logopt, facility);
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S_log_open = 1;
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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syslog_syslog(PyObject * self, PyObject * args)
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{
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PyObject *message_object;
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const char *message;
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int priority = LOG_INFO;
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if (!PyArg_ParseTuple(args, "iU;[priority,] message string",
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&priority, &message_object)) {
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PyErr_Clear();
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if (!PyArg_ParseTuple(args, "U;[priority,] message string",
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&message_object))
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return NULL;
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}
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message = _PyUnicode_AsString(message_object);
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if (message == NULL)
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return NULL;
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/* if log is not opened, open it now */
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if (!S_log_open) {
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PyObject *openargs;
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/* Continue even if PyTuple_New fails, because openlog(3) is optional.
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* So, we can still do loggin in the unlikely event things are so hosed
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* that we can't do this tuple.
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*/
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if ((openargs = PyTuple_New(0))) {
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PyObject *openlog_ret = syslog_openlog(self, openargs, NULL);
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Py_XDECREF(openlog_ret);
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Py_DECREF(openargs);
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}
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}
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Py_BEGIN_ALLOW_THREADS;
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syslog(priority, "%s", message);
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Py_END_ALLOW_THREADS;
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Py_RETURN_NONE;
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}
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static PyObject *
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syslog_closelog(PyObject *self, PyObject *unused)
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{
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if (S_log_open) {
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closelog();
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Py_XDECREF(S_ident_o);
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S_ident_o = NULL;
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S_log_open = 0;
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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syslog_setlogmask(PyObject *self, PyObject *args)
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{
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long maskpri, omaskpri;
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if (!PyArg_ParseTuple(args, "l;mask for priority", &maskpri))
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return NULL;
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omaskpri = setlogmask(maskpri);
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return PyLong_FromLong(omaskpri);
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}
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static PyObject *
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syslog_log_mask(PyObject *self, PyObject *args)
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{
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long mask;
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long pri;
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if (!PyArg_ParseTuple(args, "l:LOG_MASK", &pri))
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return NULL;
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mask = LOG_MASK(pri);
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return PyLong_FromLong(mask);
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}
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static PyObject *
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syslog_log_upto(PyObject *self, PyObject *args)
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{
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long mask;
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long pri;
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if (!PyArg_ParseTuple(args, "l:LOG_UPTO", &pri))
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return NULL;
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mask = LOG_UPTO(pri);
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return PyLong_FromLong(mask);
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}
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/* List of functions defined in the module */
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static PyMethodDef syslog_methods[] = {
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{"openlog", (PyCFunction) syslog_openlog, METH_VARARGS | METH_KEYWORDS},
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{"closelog", syslog_closelog, METH_NOARGS},
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{"syslog", syslog_syslog, METH_VARARGS},
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{"setlogmask", syslog_setlogmask, METH_VARARGS},
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{"LOG_MASK", syslog_log_mask, METH_VARARGS},
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{"LOG_UPTO", syslog_log_upto, METH_VARARGS},
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{NULL, NULL, 0}
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};
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/* Initialization function for the module */
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static struct PyModuleDef syslogmodule = {
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PyModuleDef_HEAD_INIT,
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"syslog",
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NULL,
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-1,
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syslog_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_syslog(void)
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{
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PyObject *m;
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/* Create the module and add the functions */
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m = PyModule_Create(&syslogmodule);
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if (m == NULL)
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return NULL;
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/* Add some symbolic constants to the module */
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/* Priorities */
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PyModule_AddIntConstant(m, "LOG_EMERG", LOG_EMERG);
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PyModule_AddIntConstant(m, "LOG_ALERT", LOG_ALERT);
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PyModule_AddIntConstant(m, "LOG_CRIT", LOG_CRIT);
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PyModule_AddIntConstant(m, "LOG_ERR", LOG_ERR);
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PyModule_AddIntConstant(m, "LOG_WARNING", LOG_WARNING);
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PyModule_AddIntConstant(m, "LOG_NOTICE", LOG_NOTICE);
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PyModule_AddIntConstant(m, "LOG_INFO", LOG_INFO);
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PyModule_AddIntConstant(m, "LOG_DEBUG", LOG_DEBUG);
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/* openlog() option flags */
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PyModule_AddIntConstant(m, "LOG_PID", LOG_PID);
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PyModule_AddIntConstant(m, "LOG_CONS", LOG_CONS);
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PyModule_AddIntConstant(m, "LOG_NDELAY", LOG_NDELAY);
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#ifdef LOG_ODELAY
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PyModule_AddIntConstant(m, "LOG_ODELAY", LOG_ODELAY);
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#endif
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#ifdef LOG_NOWAIT
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PyModule_AddIntConstant(m, "LOG_NOWAIT", LOG_NOWAIT);
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#endif
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#ifdef LOG_PERROR
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PyModule_AddIntConstant(m, "LOG_PERROR", LOG_PERROR);
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#endif
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/* Facilities */
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PyModule_AddIntConstant(m, "LOG_KERN", LOG_KERN);
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PyModule_AddIntConstant(m, "LOG_USER", LOG_USER);
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PyModule_AddIntConstant(m, "LOG_MAIL", LOG_MAIL);
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PyModule_AddIntConstant(m, "LOG_DAEMON", LOG_DAEMON);
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PyModule_AddIntConstant(m, "LOG_AUTH", LOG_AUTH);
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PyModule_AddIntConstant(m, "LOG_LPR", LOG_LPR);
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PyModule_AddIntConstant(m, "LOG_LOCAL0", LOG_LOCAL0);
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PyModule_AddIntConstant(m, "LOG_LOCAL1", LOG_LOCAL1);
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PyModule_AddIntConstant(m, "LOG_LOCAL2", LOG_LOCAL2);
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PyModule_AddIntConstant(m, "LOG_LOCAL3", LOG_LOCAL3);
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PyModule_AddIntConstant(m, "LOG_LOCAL4", LOG_LOCAL4);
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PyModule_AddIntConstant(m, "LOG_LOCAL5", LOG_LOCAL5);
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PyModule_AddIntConstant(m, "LOG_LOCAL6", LOG_LOCAL6);
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PyModule_AddIntConstant(m, "LOG_LOCAL7", LOG_LOCAL7);
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#ifndef LOG_SYSLOG
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#define LOG_SYSLOG LOG_DAEMON
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#endif
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#ifndef LOG_NEWS
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#define LOG_NEWS LOG_MAIL
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#endif
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#ifndef LOG_UUCP
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#define LOG_UUCP LOG_MAIL
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#endif
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#ifndef LOG_CRON
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#define LOG_CRON LOG_DAEMON
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#endif
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PyModule_AddIntConstant(m, "LOG_SYSLOG", LOG_SYSLOG);
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PyModule_AddIntConstant(m, "LOG_CRON", LOG_CRON);
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PyModule_AddIntConstant(m, "LOG_UUCP", LOG_UUCP);
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PyModule_AddIntConstant(m, "LOG_NEWS", LOG_NEWS);
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#ifdef LOG_AUTHPRIV
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PyModule_AddIntConstant(m, "LOG_AUTHPRIV", LOG_AUTHPRIV);
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#endif
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return m;
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}
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