1 //===- FuzzerIOPosix.cpp - IO utils for Posix. ----------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 // IO functions implementation using Posix API.
10 //===----------------------------------------------------------------------===//
11 #include "FuzzerDefs.h"
12 #if LIBFUZZER_POSIX
13
14 #include "FuzzerExtFunctions.h"
15 #include "FuzzerIO.h"
16 #include <cstdarg>
17 #include <cstdio>
18 #include <dirent.h>
19 #include <fstream>
20 #include <iterator>
21 #include <libgen.h>
22 #include <sys/stat.h>
23 #include <sys/types.h>
24 #include <unistd.h>
25
26 namespace fuzzer {
27
IsFile(const std::string & Path)28 bool IsFile(const std::string &Path) {
29 struct stat St;
30 if (stat(Path.c_str(), &St))
31 return false;
32 return S_ISREG(St.st_mode);
33 }
34
ListFilesInDirRecursive(const std::string & Dir,long * Epoch,std::vector<std::string> * V,bool TopDir)35 void ListFilesInDirRecursive(const std::string &Dir, long *Epoch,
36 std::vector<std::string> *V, bool TopDir) {
37 auto E = GetEpoch(Dir);
38 if (Epoch)
39 if (E && *Epoch >= E) return;
40
41 DIR *D = opendir(Dir.c_str());
42 if (!D) {
43 Printf("No such directory: %s; exiting\n", Dir.c_str());
44 exit(1);
45 }
46 while (auto E = readdir(D)) {
47 std::string Path = DirPlusFile(Dir, E->d_name);
48 if (E->d_type == DT_REG || E->d_type == DT_LNK)
49 V->push_back(Path);
50 else if (E->d_type == DT_DIR && *E->d_name != '.')
51 ListFilesInDirRecursive(Path, Epoch, V, false);
52 }
53 closedir(D);
54 if (Epoch && TopDir)
55 *Epoch = E;
56 }
57
GetSeparator()58 char GetSeparator() {
59 return '/';
60 }
61
OpenFile(int Fd,const char * Mode)62 FILE* OpenFile(int Fd, const char* Mode) {
63 return fdopen(Fd, Mode);
64 }
65
CloseFile(int fd)66 int CloseFile(int fd) {
67 return close(fd);
68 }
69
DuplicateFile(int Fd)70 int DuplicateFile(int Fd) {
71 return dup(Fd);
72 }
73
RemoveFile(const std::string & Path)74 void RemoveFile(const std::string &Path) {
75 unlink(Path.c_str());
76 }
77
DirName(const std::string & FileName)78 std::string DirName(const std::string &FileName) {
79 char *Tmp = new char[FileName.size() + 1];
80 memcpy(Tmp, FileName.c_str(), FileName.size() + 1);
81 std::string Res = dirname(Tmp);
82 delete [] Tmp;
83 return Res;
84 }
85
86 } // namespace fuzzer
87
88 #endif // LIBFUZZER_POSIX
89