1 //===--- CloexecPipeCheck.cpp - clang-tidy---------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "CloexecPipeCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace android {
18 
registerMatchers(MatchFinder * Finder)19 void CloexecPipeCheck::registerMatchers(MatchFinder *Finder) {
20   registerMatchersImpl(Finder,
21                        functionDecl(returns(isInteger()), hasName("pipe"),
22                                     hasParameter(0, hasType(pointsTo(isInteger())))));
23 }
24 
check(const MatchFinder::MatchResult & Result)25 void CloexecPipeCheck::check(const MatchFinder::MatchResult &Result) {
26   std::string ReplacementText =
27       (Twine("pipe2(") + getSpellingArg(Result, 0) + ", O_CLOEXEC)").str();
28 
29   replaceFunc(
30       Result,
31       "prefer pipe2() with O_CLOEXEC to avoid leaking file descriptors to child processes",
32       ReplacementText);
33 }
34 
35 } // namespace android
36 } // namespace tidy
37 } // namespace clang
38