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// spell-checker:ignore logoption openlog setlogmask upto NDELAY ODELAY

pub(crate) use syslog::module_def;

#[pymodule(name = "syslog")]

mod syslog {

use crate::common::lock::PyRwLock;

use crate::vm::{

PyObjectRef, PyPayload, PyResult, VirtualMachine,

builtins::{PyStr, PyStrRef},

function::{OptionalArg, OptionalOption},

utils::ToCString,

};

use core::ffi::CStr;

use std::os::raw::c_char;

#[pyattr]

use libc::{

LOG_ALERT, LOG_AUTH, LOG_CONS, LOG_CRIT, LOG_DAEMON, LOG_DEBUG, LOG_EMERG, LOG_ERR,

LOG_INFO, LOG_KERN, LOG_LOCAL0, LOG_LOCAL1, LOG_LOCAL2, LOG_LOCAL3, LOG_LOCAL4, LOG_LOCAL5,

LOG_LOCAL6, LOG_LOCAL7, LOG_LPR, LOG_MAIL, LOG_NDELAY, LOG_NEWS, LOG_NOTICE, LOG_NOWAIT,

LOG_ODELAY, LOG_PID, LOG_SYSLOG, LOG_USER, LOG_UUCP, LOG_WARNING,

};

#[cfg(not(target_os = "redox"))]

#[pyattr]

use libc::{LOG_AUTHPRIV, LOG_CRON, LOG_PERROR};

fn get_argv(vm: &VirtualMachine) -> Option<PyStrRef> {

if let Some(argv) = vm.state.config.settings.argv.first()

&& !argv.is_empty()

{

return Some(

PyStr::from(match argv.find('\\') {

Some(value) => &argv[value..],

None => argv,

})

.into_ref(&vm.ctx),

);

}

None

}

#[derive(Debug)]

enum GlobalIdent {

Explicit(Box<CStr>),

Implicit,

}

impl GlobalIdent {

fn as_ptr(&self) -> *const c_char {

match self {

Self::Explicit(cstr) => cstr.as_ptr(),

Self::Implicit => core::ptr::null(),

}

fn global_ident() -> &'static PyRwLock<Option<GlobalIdent>> {

rustpython_common::static_cell! {

static IDENT: PyRwLock<Option<GlobalIdent>>;

};

IDENT.get_or_init(|| PyRwLock::new(None))

}

#[derive(Default, FromArgs)]

struct OpenLogArgs {

#[pyarg(any, optional)]

ident: OptionalOption<PyStrRef>,

#[pyarg(any, optional)]

logoption: OptionalArg<i32>,

#[pyarg(any, optional)]

facility: OptionalArg<i32>,

}

#[pyfunction]

fn openlog(args: OpenLogArgs, vm: &VirtualMachine) -> PyResult<()> {

let logoption = args.logoption.unwrap_or(0);

let facility = args.facility.unwrap_or(LOG_USER);

let ident = match args.ident.flatten() {

Some(args) => Some(args.to_cstring(vm)?),

None => get_argv(vm).map(|argv| argv.to_cstring(vm)).transpose()?,

}

.map(|ident| ident.into_boxed_c_str());

let ident = match ident {

Some(ident) => GlobalIdent::Explicit(ident),

None => GlobalIdent::Implicit,

};

{

let mut locked_ident = global_ident().write();

unsafe { libc::openlog(ident.as_ptr(), logoption, facility) };

*locked_ident = Some(ident);

}

Ok(())

}

#[derive(FromArgs)]

struct SysLogArgs {

#[pyarg(positional)]

priority: PyObjectRef,

#[pyarg(positional, optional)]

message_object: OptionalOption<PyStrRef>,

}

#[pyfunction]

fn syslog(args: SysLogArgs, vm: &VirtualMachine) -> PyResult<()> {

let (priority, msg) = match args.message_object.flatten() {

Some(s) => (args.priority.try_into_value(vm)?, s),

None => (LOG_INFO, args.priority.try_into_value(vm)?),

};

if global_ident().read().is_none() {

openlog(OpenLogArgs::default(), vm)?;

}

let (cformat, cmsg) = ("%s".to_cstring(vm)?, msg.to_cstring(vm)?);

unsafe { libc::syslog(priority, cformat.as_ptr(), cmsg.as_ptr()) };

Ok(())

}

#[pyfunction]

fn closelog() {

if global_ident().read().is_some() {

let mut locked_ident = global_ident().write();

unsafe { libc::closelog() };

*locked_ident = None;

}

#[pyfunction]

fn setlogmask(maskpri: i32) -> i32 {

unsafe { libc::setlogmask(maskpri) }

}

#[inline]

#[pyfunction(name = "LOG_MASK")]

const fn log_mask(pri: i32) -> i32 {

pri << 1

}

#[inline]

#[pyfunction(name = "LOG_UPTO")]

const fn log_upto(pri: i32) -> i32 {

(1 << (pri + 1)) - 1

}

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