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#include "Python.h"
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
/* don't know why this isn't defined in a header file */
#ifndef getrusage
int getrusage(int who, struct rusage *rusage);
#endif
#ifndef getpagesize
int getpagesize(void);
#endif
#define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
static PyObject *ResourceError;
static PyObject *
resource_getrusage(self, args)
PyObject *self;
PyObject *args;
{
int who;
struct rusage ru;
if (!PyArg_ParseTuple(args, "i", &who))
return NULL;
if (getrusage(who, &ru) == -1) {
if (errno == EINVAL) {
PyErr_SetString(PyExc_ValueError,
"invalid who parameter");
return NULL;
}
PyErr_SetFromErrno(ResourceError);
return NULL;
}
/* Yeah, this 16-tuple is way ugly. It's probably a lot less
ugly than a dictionary with keys (or object attributes)
named things like 'ixrss'.
*/
return Py_BuildValue(
"ddiiiiiiiiiiiiii",
doubletime(ru.ru_utime), /* user time used */
doubletime(ru.ru_stime), /* system time used */
ru.ru_maxrss, /* max. resident set size */
ru.ru_ixrss, /* shared memory size */
ru.ru_idrss, /* unshared memory size */
ru.ru_isrss, /* unshared stack size */
ru.ru_minflt, /* page faults not requiring I/O*/
ru.ru_majflt, /* page faults requiring I/O */
ru.ru_nswap, /* number of swap outs */
ru.ru_inblock, /* block input operations */
ru.ru_oublock, /* block output operations */
ru.ru_msgsnd, /* messages sent */
ru.ru_msgrcv, /* messages received */
ru.ru_nsignals, /* signals received */
ru.ru_nvcsw, /* voluntary context switchs */
ru.ru_nivcsw /* involuntary context switchs */
);
}
static PyObject *
resource_getrlimit(self, args)
PyObject *self;
PyObject *args;
{
struct rlimit rl;
int resource;
char *errstr;
if (!PyArg_ParseTuple(args, "i", &resource))
return NULL;
if (resource < 0 || resource >= RLIM_NLIMITS) {
PyErr_SetString(PyExc_ValueError,
"invalid resource specified");
return NULL;
}
if (getrlimit(resource, &rl) == -1) {
PyErr_SetFromErrno(ResourceError);
return NULL;
}
return Py_BuildValue("ii", rl.rlim_cur, rl.rlim_max);
}
static PyObject *
resource_setrlimit(self, args)
PyObject *self;
PyObject *args;
{
struct rlimit rl;
int resource;
char *errstr;
if (!PyArg_ParseTuple(args, "i(ii)", &resource, &rl.rlim_cur,
&rl.rlim_max))
return NULL;
if (resource < 0 || resource >= RLIM_NLIMITS) {
PyErr_SetString(PyExc_ValueError,
"invalid resource specified");
return NULL;
}
rl.rlim_cur = rl.rlim_cur & RLIM_INFINITY;
rl.rlim_max = rl.rlim_max & RLIM_INFINITY;
if (setrlimit(resource, &rl) == -1) {
if (errno == EINVAL)
PyErr_SetString(PyExc_ValueError,
"current limit exceeds maximum limit");
else if (errno == EPERM)
PyErr_SetString(PyExc_ValueError,
"not allowed to raise maximum limit");
else
PyErr_SetFromErrno(ResourceError);
return NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
resource_getpagesize(self, args)
PyObject *self;
PyObject *args;
{
if (!PyArg_ParseTuple(args, ""))
return NULL;
return Py_BuildValue("i", getpagesize());
}
/* List of functions */
static struct PyMethodDef
resource_methods[] = {
{"getrusage", resource_getrusage, 1},
{"getrlimit", resource_getrlimit, 1},
{"setrlimit", resource_setrlimit, 1},
{"getpagesize", resource_getpagesize, 1},
{NULL, NULL} /* sentinel */
};
/* Module initialization */
static void
ins(PyObject *dict, char *name, int value)
{
PyObject *v = PyInt_FromLong((long) value);
if (v) {
PyDict_SetItemString(dict, name, v);
Py_DECREF(v);
}
/* errors will be checked by initresource() */
}
void initresource()
{
PyObject *m, *d;
/* Create the module and add the functions */
m = Py_InitModule("resource", resource_methods);
/* Add some symbolic constants to the module */
d = PyModule_GetDict(m);
ResourceError = PyString_FromString("resource.error");
PyDict_SetItemString(d, "error", ResourceError);
/* insert constants */
#ifdef RLIMIT_CPU
ins(d, "RLIMIT_CPU", RLIMIT_CPU);
#endif
#ifdef RLIMIT_FSIZE
ins(d, "RLIMIT_FSIZE", RLIMIT_FSIZE);
#endif
#ifdef RLIMIT_DATA
ins(d, "RLIMIT_DATA", RLIMIT_DATA);
#endif
#ifdef RLIMIT_STACK
ins(d, "RLIMIT_STACK", RLIMIT_STACK);
#endif
#ifdef RLIMIT_CORE
ins(d, "RLIMIT_CORE", RLIMIT_CORE);
#endif
#ifdef RLIMIT_NOFILE
ins(d, "RLIMIT_NOFILE", RLIMIT_NOFILE);
#endif
#ifdef RLIMIT_OFILE
ins(d, "RLIMIT_OFILE", RLIMIT_OFILE);
#endif
#ifdef RLIMIT_VMEM
ins(d, "RLIMIT_VMEM", RLIMIT_VMEM);
#endif
#ifdef RLIMIT_AS
ins(d, "RLIMIT_AS", RLIMIT_AS);
#endif
#ifdef RLIMIT_RSS
ins(d, "RLIMIT_RSS", RLIMIT_RSS);
#endif
#ifdef RLIMIT_NPROC
ins(d, "RLIMIT_NPROC", RLIMIT_NPROC);
#endif
#ifdef RLIMIT_MEMLOCK
ins(d, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
#endif
#ifdef RUSAGE_SELF
ins(d, "RUSAGE_SELF", RUSAGE_SELF);
#endif
#ifdef RUSAGE_CHILDERN
ins(d, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
#endif
#ifdef RUSAGE_BOTH
ins(d, "RUSAGE_BOTH", RUSAGE_BOTH);
#endif
/* Check for errors */
if (PyErr_Occurred())
Py_FatalError("can't initialize module resource");
}
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