compiler-rt/lib/fuzzer/FuzzerUtilLinux.cpp

   1 //===- FuzzerUtilLinux.cpp - Misc utils for Linux. ------------------------===//
   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 // Misc utils for Linux.
   9 //===----------------------------------------------------------------------===//
  10 #include "FuzzerPlatform.h"
  11 #if LIBFUZZER_LINUX || LIBFUZZER_NETBSD || LIBFUZZER_FREEBSD ||                \
  12     LIBFUZZER_EMSCRIPTEN
  13 #include "FuzzerCommand.h"
  14 #include "FuzzerInternal.h"
  15
  16 #include <signal.h>
  17 #include <stdlib.h>
  18 #include <sys/types.h>
  19 #include <sys/wait.h>
  20 #include <unistd.h>
  21
  22
  23 namespace fuzzer {
  24
  25 int ExecuteCommand(const Command &Cmd) {
  26   std::string CmdLine = Cmd.toString();
  27   int exit_code = system(CmdLine.c_str());
  28   if (WIFEXITED(exit_code))
  29     return WEXITSTATUS(exit_code);
  30   if (WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGINT)
  31     return Fuzzer::InterruptExitCode();
  32   return exit_code;
  33 }
  34
  35 void DiscardOutput(int Fd) {
  36   FILE* Temp = fopen("/dev/null", "w");
  37   if (!Temp)
  38     return;
  39   dup2(fileno(Temp), Fd);
  40   fclose(Temp);
  41 }
  42
  43 } // namespace fuzzer
  44
  45 #endif