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95 lines
2.6 KiB
95 lines
2.6 KiB
//===-- TildeExpressionResolver.cpp ---------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/TildeExpressionResolver.h"
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#include <assert.h>
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#include <system_error>
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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#if !defined(_WIN32)
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#include <pwd.h>
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#endif
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using namespace lldb_private;
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using namespace llvm;
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namespace fs = llvm::sys::fs;
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namespace path = llvm::sys::path;
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TildeExpressionResolver::~TildeExpressionResolver() {}
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bool StandardTildeExpressionResolver::ResolveExact(
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StringRef Expr, SmallVectorImpl<char> &Output) {
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// We expect the tilde expression to be ONLY the expression itself, and
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// contain no separators.
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assert(!llvm::any_of(Expr, [](char c) { return path::is_separator(c); }));
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assert(Expr.empty() || Expr[0] == '~');
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return !fs::real_path(Expr, Output, true);
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}
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bool StandardTildeExpressionResolver::ResolvePartial(StringRef Expr,
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StringSet<> &Output) {
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// We expect the tilde expression to be ONLY the expression itself, and
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// contain no separators.
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assert(!llvm::any_of(Expr, [](char c) { return path::is_separator(c); }));
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assert(Expr.empty() || Expr[0] == '~');
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Output.clear();
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#if defined(_WIN32) || defined(__ANDROID__)
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return false;
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#else
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if (Expr.empty())
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return false;
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SmallString<32> Buffer("~");
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setpwent();
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struct passwd *user_entry;
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Expr = Expr.drop_front();
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while ((user_entry = getpwent()) != nullptr) {
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StringRef ThisName(user_entry->pw_name);
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if (!ThisName.startswith(Expr))
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continue;
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Buffer.resize(1);
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Buffer.append(ThisName);
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Buffer.append(path::get_separator());
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Output.insert(Buffer);
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}
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return true;
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#endif
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}
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bool TildeExpressionResolver::ResolveFullPath(
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StringRef Expr, llvm::SmallVectorImpl<char> &Output) {
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if (!Expr.startswith("~")) {
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Output.assign(Expr.begin(), Expr.end());
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return false;
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}
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namespace path = llvm::sys::path;
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StringRef Left =
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Expr.take_until([](char c) { return path::is_separator(c); });
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if (!ResolveExact(Left, Output)) {
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Output.assign(Expr.begin(), Expr.end());
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return false;
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}
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Output.append(Expr.begin() + Left.size(), Expr.end());
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return true;
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}
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