lib/Support/Program.cpp

   1 //===-- Program.cpp - Implement OS Program Concept --------------*- C++ -*-===//
   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 //
  10 //  This file implements the operating system Program concept.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/Program.h"
  15 #include "llvm/ADT/StringRef.h"
  16 #include "llvm/Config/config.h"
  17 #include <system_error>
  18 using namespace llvm;
  19 using namespace sys;
  20
  21 //===----------------------------------------------------------------------===//
  22 //=== WARNING: Implementation here must contain only TRULY operating system
  23 //===          independent code.
  24 //===----------------------------------------------------------------------===//
  25
  26 static bool Execute(ProcessInfo &PI, StringRef Program, const char **args,
  27                     const char **env, const StringRef **Redirects,
  28                     unsigned memoryLimit, std::string *ErrMsg);
  29
  30 int sys::ExecuteAndWait(StringRef Program, const char **args, const char **envp,
  31                         const StringRef **redirects, unsigned secondsToWait,
  32                         unsigned memoryLimit, std::string *ErrMsg,
  33                         bool *ExecutionFailed) {
  34   ProcessInfo PI;
  35   if (Execute(PI, Program, args, envp, redirects, memoryLimit, ErrMsg)) {
  36     if (ExecutionFailed)
  37       *ExecutionFailed = false;
  38     ProcessInfo Result = Wait(
  39         PI, secondsToWait, /*WaitUntilTerminates=*/secondsToWait == 0, ErrMsg);
  40     return Result.ReturnCode;
  41   }
  42
  43   if (ExecutionFailed)
  44     *ExecutionFailed = true;
  45
  46   return -1;
  47 }
  48
  49 ProcessInfo sys::ExecuteNoWait(StringRef Program, const char **args,
  50                                const char **envp, const StringRef **redirects,
  51                                unsigned memoryLimit, std::string *ErrMsg,
  52                                bool *ExecutionFailed) {
  53   ProcessInfo PI;
  54   if (ExecutionFailed)
  55     *ExecutionFailed = false;
  56   if (!Execute(PI, Program, args, envp, redirects, memoryLimit, ErrMsg))
  57     if (ExecutionFailed)
  58       *ExecutionFailed = true;
  59
  60   return PI;
  61 }
  62
  63 // Include the platform-specific parts of this class.
  64 #ifdef LLVM_ON_UNIX
  65 #include "Unix/Program.inc"
  66 #endif
  67 #ifdef LLVM_ON_WIN32
  68 #include "Windows/Program.inc"
  69 #endif