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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use super::utils::into_string;
use crate::permissions::Permissions;
use deno_core::error::{type_error, AnyError};
use deno_core::op_sync;
use deno_core::url::Url;
use deno_core::Extension;
use deno_core::OpState;
use serde::Deserialize;
use serde::Serialize;
use std::collections::HashMap;
use std::env;
pub fn init() -> Extension {
Extension::builder()
.ops(vec![
("op_exit", op_sync(op_exit)),
("op_env", op_sync(op_env)),
("op_exec_path", op_sync(op_exec_path)),
("op_set_env", op_sync(op_set_env)),
("op_get_env", op_sync(op_get_env)),
("op_delete_env", op_sync(op_delete_env)),
("op_hostname", op_sync(op_hostname)),
("op_loadavg", op_sync(op_loadavg)),
("op_os_release", op_sync(op_os_release)),
("op_system_memory_info", op_sync(op_system_memory_info)),
])
.build()
}
fn op_exec_path(
state: &mut OpState,
_args: (),
_: (),
) -> Result<String, AnyError> {
let current_exe = env::current_exe().unwrap();
state
.borrow_mut::<Permissions>()
.read
.check_blind(¤t_exe, "exec_path")?;
// Now apply URL parser to current exe to get fully resolved path, otherwise
// we might get `./` and `../` bits in `exec_path`
let exe_url = Url::from_file_path(current_exe).unwrap();
let path = exe_url.to_file_path().unwrap();
into_string(path.into_os_string())
}
#[derive(Deserialize)]
pub struct SetEnv {
key: String,
value: String,
}
fn op_set_env(
state: &mut OpState,
args: SetEnv,
_: (),
) -> Result<(), AnyError> {
state.borrow_mut::<Permissions>().env.check(&args.key)?;
let invalid_key =
args.key.is_empty() || args.key.contains(&['=', '\0'] as &[char]);
let invalid_value = args.value.contains('\0');
if invalid_key || invalid_value {
return Err(type_error("Key or value contains invalid characters."));
}
env::set_var(args.key, args.value);
Ok(())
}
fn op_env(
state: &mut OpState,
_args: (),
_: (),
) -> Result<HashMap<String, String>, AnyError> {
state.borrow_mut::<Permissions>().env.check_all()?;
Ok(env::vars().collect())
}
fn op_get_env(
state: &mut OpState,
key: String,
_: (),
) -> Result<Option<String>, AnyError> {
state.borrow_mut::<Permissions>().env.check(&key)?;
if key.is_empty() || key.contains(&['=', '\0'] as &[char]) {
return Err(type_error("Key contains invalid characters."));
}
let r = match env::var(key) {
Err(env::VarError::NotPresent) => None,
v => Some(v?),
};
Ok(r)
}
fn op_delete_env(
state: &mut OpState,
key: String,
_: (),
) -> Result<(), AnyError> {
state.borrow_mut::<Permissions>().env.check(&key)?;
if key.is_empty() || key.contains(&['=', '\0'] as &[char]) {
return Err(type_error("Key contains invalid characters."));
}
env::remove_var(key);
Ok(())
}
fn op_exit(_state: &mut OpState, code: i32, _: ()) -> Result<(), AnyError> {
std::process::exit(code)
}
fn op_loadavg(
state: &mut OpState,
_args: (),
_: (),
) -> Result<(f64, f64, f64), AnyError> {
super::check_unstable(state, "Deno.loadavg");
state.borrow_mut::<Permissions>().env.check_all()?;
match sys_info::loadavg() {
Ok(loadavg) => Ok((loadavg.one, loadavg.five, loadavg.fifteen)),
Err(_) => Ok((0.0, 0.0, 0.0)),
}
}
fn op_hostname(
state: &mut OpState,
_args: (),
_: (),
) -> Result<String, AnyError> {
super::check_unstable(state, "Deno.hostname");
state.borrow_mut::<Permissions>().env.check_all()?;
let hostname = sys_info::hostname().unwrap_or_else(|_| "".to_string());
Ok(hostname)
}
fn op_os_release(
state: &mut OpState,
_args: (),
_: (),
) -> Result<String, AnyError> {
super::check_unstable(state, "Deno.osRelease");
state.borrow_mut::<Permissions>().env.check_all()?;
let release = sys_info::os_release().unwrap_or_else(|_| "".to_string());
Ok(release)
}
// Copied from sys-info/lib.rs (then tweaked)
#[derive(Serialize)]
#[serde(rename_all = "camelCase")]
struct MemInfo {
pub total: u64,
pub free: u64,
pub available: u64,
pub buffers: u64,
pub cached: u64,
pub swap_total: u64,
pub swap_free: u64,
}
fn op_system_memory_info(
state: &mut OpState,
_args: (),
_: (),
) -> Result<Option<MemInfo>, AnyError> {
super::check_unstable(state, "Deno.systemMemoryInfo");
state.borrow_mut::<Permissions>().env.check_all()?;
match sys_info::mem_info() {
Ok(info) => Ok(Some(MemInfo {
total: info.total,
free: info.free,
available: info.avail,
buffers: info.buffers,
cached: info.cached,
swap_total: info.swap_total,
swap_free: info.swap_free,
})),
Err(_) => Ok(None),
}
}
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