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// spell-checker:disable

pub(crate) use resource::module_def;

#[pymodule]

mod resource {

use crate::vm::{

PyObject, PyObjectRef, PyResult, TryFromBorrowedObject, VirtualMachine,

convert::{ToPyException, ToPyObject},

types::PyStructSequence,

};

use core::mem;

use std::io;

cfg_if::cfg_if! {

if #[cfg(target_os = "android")] {

#[expect(deprecated)]

const RLIM_NLIMITS: i32 = libc::RLIM_NLIMITS;

} else {

// This constant isn't abi-stable across os versions, so we just

// pick a high number so we don't get false positive ValueErrors and just bubble up the

// EINVAL that get/setrlimit return on an invalid resource

const RLIM_NLIMITS: i32 = 256;

}

// TODO: RLIMIT_OFILE,

#[pyattr]

use libc::{

RLIM_INFINITY, RLIMIT_AS, RLIMIT_CORE, RLIMIT_CPU, RLIMIT_DATA, RLIMIT_FSIZE,

RLIMIT_MEMLOCK, RLIMIT_NOFILE, RLIMIT_NPROC, RLIMIT_RSS, RLIMIT_STACK,

};

#[cfg(any(target_os = "linux", target_os = "android", target_os = "emscripten"))]

#[pyattr]

use libc::{RLIMIT_MSGQUEUE, RLIMIT_NICE, RLIMIT_RTPRIO, RLIMIT_SIGPENDING};

// TODO: I think this is supposed to be defined for all linux_like?

#[cfg(target_os = "linux")]

#[pyattr]

use libc::RLIMIT_RTTIME;

#[cfg(any(

target_os = "freebsd",

target_os = "netbsd",

target_os = "solaris",

target_os = "illumos"

))]

#[pyattr]

use libc::RLIMIT_SBSIZE;

#[cfg(any(target_os = "freebsd", target_os = "solaris", target_os = "illumos"))]

#[pyattr]

use libc::{RLIMIT_NPTS, RLIMIT_SWAP};

#[cfg(any(target_os = "solaris", target_os = "illumos"))]

#[pyattr]

use libc::RLIMIT_VMEM;

#[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "freebsd"))]

#[pyattr]

use libc::RUSAGE_THREAD;

#[cfg(not(any(target_os = "windows", target_os = "redox")))]

#[pyattr]

use libc::{RUSAGE_CHILDREN, RUSAGE_SELF};

#[pystruct_sequence_data]

struct RUsageData {

ru_utime: f64,

ru_stime: f64,

ru_maxrss: libc::c_long,

ru_ixrss: libc::c_long,

ru_idrss: libc::c_long,

ru_isrss: libc::c_long,

ru_minflt: libc::c_long,

ru_majflt: libc::c_long,

ru_nswap: libc::c_long,

ru_inblock: libc::c_long,

ru_oublock: libc::c_long,

ru_msgsnd: libc::c_long,

ru_msgrcv: libc::c_long,

ru_nsignals: libc::c_long,

ru_nvcsw: libc::c_long,

ru_nivcsw: libc::c_long,

}

#[pyattr]

#[pystruct_sequence(name = "struct_rusage", module = "resource", data = "RUsageData")]

struct PyRUsage;

#[pyclass(with(PyStructSequence))]

impl PyRUsage {}

impl From<libc::rusage> for RUsageData {

fn from(rusage: libc::rusage) -> Self {

let tv = |tv: libc::timeval| tv.tv_sec as f64 + (tv.tv_usec as f64 / 1_000_000.0);

Self {

ru_utime: tv(rusage.ru_utime),

ru_stime: tv(rusage.ru_stime),

ru_maxrss: rusage.ru_maxrss,

ru_ixrss: rusage.ru_ixrss,

ru_idrss: rusage.ru_idrss,

ru_isrss: rusage.ru_isrss,

ru_minflt: rusage.ru_minflt,

ru_majflt: rusage.ru_majflt,

ru_nswap: rusage.ru_nswap,

ru_inblock: rusage.ru_inblock,

ru_oublock: rusage.ru_oublock,

ru_msgsnd: rusage.ru_msgsnd,

ru_msgrcv: rusage.ru_msgrcv,

ru_nsignals: rusage.ru_nsignals,

ru_nvcsw: rusage.ru_nvcsw,

ru_nivcsw: rusage.ru_nivcsw,

}

#[pyfunction]

fn getrusage(who: i32, vm: &VirtualMachine) -> PyResult<RUsageData> {

let res = unsafe {

let mut rusage = mem::MaybeUninit::<libc::rusage>::uninit();

if libc::getrusage(who, rusage.as_mut_ptr()) == -1 {

Err(io::Error::last_os_error())

} else {

Ok(rusage.assume_init())

}

};

res.map(RUsageData::from).map_err(|e| {

if e.kind() == io::ErrorKind::InvalidInput {

vm.new_value_error("invalid who parameter")

} else {

e.to_pyexception(vm)

}

})

}

struct Limits(libc::rlimit);

impl<'a> TryFromBorrowedObject<'a> for Limits {

fn try_from_borrowed_object(vm: &VirtualMachine, obj: &'a PyObject) -> PyResult<Self> {

let seq: Vec<libc::rlim_t> = obj.try_to_value(vm)?;

match *seq {

[cur, max] => Ok(Self(libc::rlimit {

rlim_cur: cur & RLIM_INFINITY,

rlim_max: max & RLIM_INFINITY,

})),

_ => Err(vm.new_value_error("expected a tuple of 2 integers")),

}

impl ToPyObject for Limits {

fn to_pyobject(self, vm: &VirtualMachine) -> PyObjectRef {

(self.0.rlim_cur, self.0.rlim_max).to_pyobject(vm)

}

#[pyfunction]

fn getrlimit(resource: i32, vm: &VirtualMachine) -> PyResult<Limits> {

#[allow(clippy::unnecessary_cast)]

if resource < 0 || resource >= RLIM_NLIMITS as i32 {

return Err(vm.new_value_error("invalid resource specified"));

}

let rlimit = unsafe {

let mut rlimit = mem::MaybeUninit::<libc::rlimit>::uninit();

if libc::getrlimit(resource as _, rlimit.as_mut_ptr()) == -1 {

return Err(vm.new_last_errno_error());

}

rlimit.assume_init()

};

Ok(Limits(rlimit))

}

#[pyfunction]

fn setrlimit(resource: i32, limits: Limits, vm: &VirtualMachine) -> PyResult<()> {

#[allow(clippy::unnecessary_cast)]

if resource < 0 || resource >= RLIM_NLIMITS as i32 {

return Err(vm.new_value_error("invalid resource specified"));

}

let res = unsafe {

if libc::setrlimit(resource as _, &limits.0) == -1 {

Err(io::Error::last_os_error())

} else {

Ok(())

}

};

res.map_err(|e| match e.kind() {

io::ErrorKind::InvalidInput => {

vm.new_value_error("current limit exceeds maximum limit")

}

io::ErrorKind::PermissionDenied => {

vm.new_value_error("not allowed to raise maximum limit")

}

_ => e.to_pyexception(vm),

})

}

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