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| //===- FuzzerIOPosix.cpp - IO utils for Posix. ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// IO functions implementation using Posix API.
//===----------------------------------------------------------------------===//
#include "FuzzerDefs.h"
#if LIBFUZZER_POSIX || LIBFUZZER_FUCHSIA
#include "FuzzerExtFunctions.h"
#include "FuzzerIO.h"
#include <cstdarg>
#include <cstdio>
#include <dirent.h>
#include <fstream>
#include <iterator>
#include <libgen.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
namespace fuzzer {
bool IsFile(const std::string &Path) {
struct stat St;
if (stat(Path.c_str(), &St))
return false;
return S_ISREG(St.st_mode);
}
static bool IsDirectory(const std::string &Path) {
struct stat St;
if (stat(Path.c_str(), &St))
return false;
return S_ISDIR(St.st_mode);
}
size_t FileSize(const std::string &Path) {
struct stat St;
if (stat(Path.c_str(), &St))
return 0;
return St.st_size;
}
std::string Basename(const std::string &Path) {
size_t Pos = Path.rfind(GetSeparator());
if (Pos == std::string::npos) return Path;
assert(Pos < Path.size());
return Path.substr(Pos + 1);
}
void ListFilesInDirRecursive(const std::string &Dir, long *Epoch,
Vector<std::string> *V, bool TopDir) {
auto E = GetEpoch(Dir);
if (Epoch)
if (E && *Epoch >= E) return;
DIR *D = opendir(Dir.c_str());
if (!D) {
Printf("%s: %s; exiting\n", strerror(errno), Dir.c_str());
exit(1);
}
while (auto E = readdir(D)) {
std::string Path = DirPlusFile(Dir, E->d_name);
if (E->d_type == DT_REG || E->d_type == DT_LNK ||
(E->d_type == DT_UNKNOWN && IsFile(Path)))
V->push_back(Path);
else if ((E->d_type == DT_DIR ||
(E->d_type == DT_UNKNOWN && IsDirectory(Path))) &&
*E->d_name != '.')
ListFilesInDirRecursive(Path, Epoch, V, false);
}
closedir(D);
if (Epoch && TopDir)
*Epoch = E;
}
void IterateDirRecursive(const std::string &Dir,
void (*DirPreCallback)(const std::string &Dir),
void (*DirPostCallback)(const std::string &Dir),
void (*FileCallback)(const std::string &Dir)) {
DirPreCallback(Dir);
DIR *D = opendir(Dir.c_str());
if (!D) return;
while (auto E = readdir(D)) {
std::string Path = DirPlusFile(Dir, E->d_name);
if (E->d_type == DT_REG || E->d_type == DT_LNK ||
(E->d_type == DT_UNKNOWN && IsFile(Path)))
FileCallback(Path);
else if ((E->d_type == DT_DIR ||
(E->d_type == DT_UNKNOWN && IsDirectory(Path))) &&
*E->d_name != '.')
IterateDirRecursive(Path, DirPreCallback, DirPostCallback, FileCallback);
}
closedir(D);
DirPostCallback(Dir);
}
char GetSeparator() {
return '/';
}
FILE* OpenFile(int Fd, const char* Mode) {
return fdopen(Fd, Mode);
}
int CloseFile(int fd) {
return close(fd);
}
int DuplicateFile(int Fd) {
return dup(Fd);
}
void RemoveFile(const std::string &Path) {
unlink(Path.c_str());
}
void RenameFile(const std::string &OldPath, const std::string &NewPath) {
rename(OldPath.c_str(), NewPath.c_str());
}
void DiscardOutput(int Fd) {
FILE* Temp = fopen("/dev/null", "w");
if (!Temp)
return;
dup2(fileno(Temp), Fd);
fclose(Temp);
}
intptr_t GetHandleFromFd(int fd) {
return static_cast<intptr_t>(fd);
}
std::string DirName(const std::string &FileName) {
char *Tmp = new char[FileName.size() + 1];
memcpy(Tmp, FileName.c_str(), FileName.size() + 1);
std::string Res = dirname(Tmp);
delete [] Tmp;
return Res;
}
std::string TmpDir() {
if (auto Env = getenv("TMPDIR"))
return Env;
return "/tmp";
}
bool IsInterestingCoverageFile(const std::string &FileName) {
if (FileName.find("compiler-rt/lib/") != std::string::npos)
return false; // sanitizer internal.
if (FileName.find("/usr/lib/") != std::string::npos)
return false;
if (FileName.find("/usr/include/") != std::string::npos)
return false;
if (FileName == "<null>")
return false;
return true;
}
void RawPrint(const char *Str) {
write(2, Str, strlen(Str));
}
void MkDir(const std::string &Path) {
mkdir(Path.c_str(), 0700);
}
void RmDir(const std::string &Path) {
rmdir(Path.c_str());
}
const std::string &getDevNull() {
static const std::string devNull = "/dev/null";
return devNull;
}
} // namespace fuzzer
#endif // LIBFUZZER_POSIX
|