106 lines
3.6 KiB
Rust
106 lines
3.6 KiB
Rust
use clippy_utils::diagnostics::span_lint_and_sugg;
|
|
use clippy_utils::source::{snippet_opt, snippet_with_applicability};
|
|
use clippy_utils::ty::match_type;
|
|
use clippy_utils::{match_def_path, paths};
|
|
use if_chain::if_chain;
|
|
use rustc_errors::Applicability;
|
|
use rustc_hir::{Expr, ExprKind};
|
|
use rustc_lint::{LateContext, LateLintPass};
|
|
use rustc_session::{declare_lint_pass, declare_tool_lint};
|
|
|
|
declare_clippy_lint! {
|
|
/// ### What it does
|
|
/// Checks for non-octal values used to set Unix file permissions.
|
|
///
|
|
/// ### Why is this bad?
|
|
/// They will be converted into octal, creating potentially
|
|
/// unintended file permissions.
|
|
///
|
|
/// ### Example
|
|
/// ```rust,ignore
|
|
/// use std::fs::OpenOptions;
|
|
/// use std::os::unix::fs::OpenOptionsExt;
|
|
///
|
|
/// let mut options = OpenOptions::new();
|
|
/// options.mode(644);
|
|
/// ```
|
|
/// Use instead:
|
|
/// ```rust,ignore
|
|
/// use std::fs::OpenOptions;
|
|
/// use std::os::unix::fs::OpenOptionsExt;
|
|
///
|
|
/// let mut options = OpenOptions::new();
|
|
/// options.mode(0o644);
|
|
/// ```
|
|
pub NON_OCTAL_UNIX_PERMISSIONS,
|
|
correctness,
|
|
"use of non-octal value to set unix file permissions, which will be translated into octal"
|
|
}
|
|
|
|
declare_lint_pass!(NonOctalUnixPermissions => [NON_OCTAL_UNIX_PERMISSIONS]);
|
|
|
|
impl LateLintPass<'_> for NonOctalUnixPermissions {
|
|
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
|
|
match &expr.kind {
|
|
ExprKind::MethodCall(path, _, [func, param], _) => {
|
|
let obj_ty = cx.typeck_results().expr_ty(func).peel_refs();
|
|
|
|
if_chain! {
|
|
if (path.ident.name == sym!(mode)
|
|
&& (match_type(cx, obj_ty, &paths::OPEN_OPTIONS)
|
|
|| match_type(cx, obj_ty, &paths::DIR_BUILDER)))
|
|
|| (path.ident.name == sym!(set_mode) && match_type(cx, obj_ty, &paths::PERMISSIONS));
|
|
if let ExprKind::Lit(_) = param.kind;
|
|
|
|
then {
|
|
let snip = match snippet_opt(cx, param.span) {
|
|
Some(s) => s,
|
|
_ => return,
|
|
};
|
|
|
|
if !snip.starts_with("0o") {
|
|
show_error(cx, param);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
ExprKind::Call(func, [param]) => {
|
|
if_chain! {
|
|
if let ExprKind::Path(ref path) = func.kind;
|
|
if let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id();
|
|
if match_def_path(cx, def_id, &paths::PERMISSIONS_FROM_MODE);
|
|
if let ExprKind::Lit(_) = param.kind;
|
|
|
|
then {
|
|
let snip = match snippet_opt(cx, param.span) {
|
|
Some(s) => s,
|
|
_ => return,
|
|
};
|
|
|
|
if !snip.starts_with("0o") {
|
|
show_error(cx, param);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
_ => {},
|
|
};
|
|
}
|
|
}
|
|
|
|
fn show_error(cx: &LateContext<'_>, param: &Expr<'_>) {
|
|
let mut applicability = Applicability::MachineApplicable;
|
|
span_lint_and_sugg(
|
|
cx,
|
|
NON_OCTAL_UNIX_PERMISSIONS,
|
|
param.span,
|
|
"using a non-octal value to set unix file permissions",
|
|
"consider using an octal literal instead",
|
|
format!(
|
|
"0o{}",
|
|
snippet_with_applicability(cx, param.span, "0o..", &mut applicability,),
|
|
),
|
|
applicability,
|
|
);
|
|
}
|