python: integrate David Strauss' python-systemd package

[elogind.git] / src / python-systemd / _journal.c

diff --git a/src/python-systemd/_journal.c b/src/python-systemd/_journal.c
new file mode 100644 (file)
index 0000000..3e10981
--- /dev/null
+++ b/src/python-systemd/_journal.c
@@ -0,0 +1,137 @@
+#include <Python.h>
+
+#define SD_JOURNAL_SUPPRESS_LOCATION
+#include <systemd/sd-journal.h>
+
+#include "macro.h"
+
+PyDoc_STRVAR(journal_sendv__doc__,
+             "sendv('FIELD=value', 'FIELD=value', ...) -> None\n\n"
+             "Send an entry to the journal."
+             );
+
+static PyObject *
+journal_sendv(PyObject *self, PyObject *args) {
+    struct iovec *iov = NULL;
+    int argc = PyTuple_Size(args);
+    int i, r;
+    PyObject *ret = NULL;
+
+    PyObject **encoded = calloc(argc, sizeof(PyObject*));
+    if (!encoded) {
+        ret = PyErr_NoMemory();
+        goto out1;
+    }
+
+    // Allocate sufficient iovector space for the arguments.
+    iov = malloc(argc * sizeof(struct iovec));
+    if (!iov) {
+        ret = PyErr_NoMemory();
+        goto out;
+    }
+
+    // Iterate through the Python arguments and fill the iovector.
+    for (i = 0; i < argc; ++i) {
+        PyObject *item = PyTuple_GetItem(args, i);
+        char *stritem;
+        Py_ssize_t length;
+
+        if (PyUnicode_Check(item)) {
+            encoded[i] = PyUnicode_AsEncodedString(item, "utf-8", "strict");
+            if (encoded[i] == NULL)
+                goto out;
+            item = encoded[i];
+        }
+        if (PyBytes_AsStringAndSize(item, &stritem, &length))
+            goto out;
+
+        iov[i].iov_base = stritem;
+        iov[i].iov_len = length;
+    }
+
+    // Clear errno, because sd_journal_sendv will not set it by
+    // itself, unless an error occurs in one of the system calls.
+    errno = 0;
+
+    // Send the iovector to the journal.
+    r = sd_journal_sendv(iov, argc);
+
+    if (r) {
+        if (errno)
+            PyErr_SetFromErrno(PyExc_IOError);
+        else
+            PyErr_SetString(PyExc_ValueError, "invalid message format");
+        goto out;
+    }
+
+    // End with success.
+    Py_INCREF(Py_None);
+    ret = Py_None;
+
+out:
+    for (i = 0; i < argc; ++i)
+        Py_XDECREF(encoded[i]);
+
+    free(encoded);
+
+out1:
+    // Free the iovector. The actual strings
+    // are already managed by Python.
+    free(iov);
+
+    return ret;
+}
+
+PyDoc_STRVAR(journal_stream_fd__doc__,
+             "stream_fd(identifier, priority, level_prefix) -> fd\n\n"
+             "Open a stream to journal by calling sd_journal_stream_fd(3)."
+             );
+
+static PyObject*
+journal_stream_fd(PyObject *self, PyObject *args) {
+    const char* identifier;
+    int priority, level_prefix;
+    int fd;
+    if (!PyArg_ParseTuple(args, "sii:stream_fd",
+                          &identifier, &priority, &level_prefix))
+        return NULL;
+
+    fd = sd_journal_stream_fd(identifier, priority, level_prefix);
+    if (fd < 0)
+        return PyErr_SetFromErrno(PyExc_IOError);
+
+    return PyLong_FromLong(fd);
+}
+
+static PyMethodDef methods[] = {
+    {"sendv",  journal_sendv, METH_VARARGS, journal_sendv__doc__},
+    {"stream_fd", journal_stream_fd, METH_VARARGS,
+     journal_stream_fd__doc__},
+    {NULL, NULL, 0, NULL}        /* Sentinel */
+};
+
+#if PY_MAJOR_VERSION < 3
+
+PyMODINIT_FUNC
+init_journal(void)
+{
+    (void) Py_InitModule("_journal", methods);
+}
+
+#else
+
+static struct PyModuleDef module = {
+    PyModuleDef_HEAD_INIT,
+    "_journal", /* name of module */
+    NULL, /* module documentation, may be NULL */
+    0, /* size of per-interpreter state of the module */
+    methods
+};
+
+PyMODINIT_FUNC
+PyInit__journal(void)
+{
+    return PyModule_Create(&module);
+}
+
+#endif