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#include "Python.h"
#include <sys/resource.h>
#include <sys/time.h>
#include <string.h>
#include <errno.h>
/* On some systems, these aren't in any header file.
On others they are, with inconsistent prototypes.
We declare the (default) return type, to shut up gcc -Wall;
but we can't declare the prototype, to avoid errors
when the header files declare it different.
Worse, on some Linuxes, getpagesize() returns a size_t... */
#define doubletime(TV) ((double)(TV).tv_sec + (TV).tv_usec * 0.000001)
static PyObject *ResourceError;
static PyObject *
resource_getrusage(PyObject *self, PyObject *args)
{
int who;
struct rusage ru;
if (!PyArg_ParseTuple(args, "i:getrusage", &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 switches */
ru.ru_nivcsw /* involuntary context switches */
);
}
static PyObject *
resource_getrlimit(PyObject *self, PyObject *args)
{
struct rlimit rl;
int resource;
if (!PyArg_ParseTuple(args, "i:getrlimit", &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;
}
#if defined(HAVE_LONG_LONG)
if (sizeof(rl.rlim_cur) > sizeof(long)) {
return Py_BuildValue("LL",
(LONG_LONG) rl.rlim_cur,
(LONG_LONG) rl.rlim_max);
}
#endif
return Py_BuildValue("ii", (long) rl.rlim_cur, (long) rl.rlim_max);
}
static PyObject *
resource_setrlimit(PyObject *self, PyObject *args)
{
struct rlimit rl;
int resource;
PyObject *curobj, *maxobj;
if (!PyArg_ParseTuple(args, "i(OO):setrlimit", &resource, &curobj, &maxobj))
return NULL;
if (resource < 0 || resource >= RLIM_NLIMITS) {
PyErr_SetString(PyExc_ValueError,
"invalid resource specified");
return NULL;
}
#if !defined(HAVE_LARGEFILE_SUPPORT)
rl.rlim_cur = PyInt_AsLong(curobj);
rl.rlim_max = PyInt_AsLong(maxobj);
#else
/* The limits are probably bigger than a long */
rl.rlim_cur = PyLong_Check(curobj) ?
PyLong_AsLongLong(curobj) : PyInt_AsLong(curobj);
rl.rlim_max = PyLong_Check(maxobj) ?
PyLong_AsLongLong(maxobj) : PyInt_AsLong(maxobj);
#endif
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(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":getpagesize"))
return NULL;
return Py_BuildValue("i", getpagesize());
}
/* List of functions */
static struct PyMethodDef
resource_methods[] = {
{"getrusage", resource_getrusage, METH_VARARGS},
{"getrlimit", resource_getrlimit, METH_VARARGS},
{"setrlimit", resource_setrlimit, METH_VARARGS},
{"getpagesize", resource_getpagesize, METH_VARARGS},
{NULL, NULL} /* sentinel */
};
/* Module initialization */
DL_EXPORT(void)
initresource(void)
{
PyObject *m;
/* Create the module and add the functions */
m = Py_InitModule("resource", resource_methods);
/* Add some symbolic constants to the module */
if (ResourceError == NULL) {
ResourceError = PyErr_NewException("resource.error",
NULL, NULL);
}
Py_INCREF(ResourceError);
PyModule_AddObject(m, "error", ResourceError);
/* insert constants */
#ifdef RLIMIT_CPU
PyModule_AddIntConstant(m, "RLIMIT_CPU", RLIMIT_CPU);
#endif
#ifdef RLIMIT_FSIZE
PyModule_AddIntConstant(m, "RLIMIT_FSIZE", RLIMIT_FSIZE);
#endif
#ifdef RLIMIT_DATA
PyModule_AddIntConstant(m, "RLIMIT_DATA", RLIMIT_DATA);
#endif
#ifdef RLIMIT_STACK
PyModule_AddIntConstant(m, "RLIMIT_STACK", RLIMIT_STACK);
#endif
#ifdef RLIMIT_CORE
PyModule_AddIntConstant(m, "RLIMIT_CORE", RLIMIT_CORE);
#endif
#ifdef RLIMIT_NOFILE
PyModule_AddIntConstant(m, "RLIMIT_NOFILE", RLIMIT_NOFILE);
#endif
#ifdef RLIMIT_OFILE
PyModule_AddIntConstant(m, "RLIMIT_OFILE", RLIMIT_OFILE);
#endif
#ifdef RLIMIT_VMEM
PyModule_AddIntConstant(m, "RLIMIT_VMEM", RLIMIT_VMEM);
#endif
#ifdef RLIMIT_AS
PyModule_AddIntConstant(m, "RLIMIT_AS", RLIMIT_AS);
#endif
#ifdef RLIMIT_RSS
PyModule_AddIntConstant(m, "RLIMIT_RSS", RLIMIT_RSS);
#endif
#ifdef RLIMIT_NPROC
PyModule_AddIntConstant(m, "RLIMIT_NPROC", RLIMIT_NPROC);
#endif
#ifdef RLIMIT_MEMLOCK
PyModule_AddIntConstant(m, "RLIMIT_MEMLOCK", RLIMIT_MEMLOCK);
#endif
#ifdef RUSAGE_SELF
PyModule_AddIntConstant(m, "RUSAGE_SELF", RUSAGE_SELF);
#endif
#ifdef RUSAGE_CHILDREN
PyModule_AddIntConstant(m, "RUSAGE_CHILDREN", RUSAGE_CHILDREN);
#endif
#ifdef RUSAGE_BOTH
PyModule_AddIntConstant(m, "RUSAGE_BOTH", RUSAGE_BOTH);
#endif
}
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