1 //===-- Process.cpp - Implement OS Process 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 Process concept.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/Support/Process.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/Config/config.h"
18 #include "llvm/Support/FileSystem.h"
19 #include "llvm/Support/Path.h"
20 #include "llvm/Support/Program.h"
21 
22 using namespace llvm;
23 using namespace sys;
24 
25 //===----------------------------------------------------------------------===//
26 //=== WARNING: Implementation here must contain only TRULY operating system
27 //===          independent code.
28 //===----------------------------------------------------------------------===//
29 
30 Optional<std::string> Process::FindInEnvPath(StringRef EnvName,
31                                              StringRef FileName) {
32   return FindInEnvPath(EnvName, FileName, {});
33 }
34 
35 Optional<std::string> Process::FindInEnvPath(StringRef EnvName,
36                                              StringRef FileName,
37                                              ArrayRef<std::string> IgnoreList) {
38   assert(!path::is_absolute(FileName));
39   Optional<std::string> FoundPath;
40   Optional<std::string> OptPath = Process::GetEnv(EnvName);
41   if (!OptPath.hasValue())
42     return FoundPath;
43 
44   const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
45   SmallVector<StringRef, 8> Dirs;
46   SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
47 
48   for (StringRef Dir : Dirs) {
49     if (Dir.empty())
50       continue;
51 
52     if (any_of(IgnoreList, [&](StringRef S) { return fs::equivalent(S, Dir); }))
53       continue;
54 
55     SmallString<128> FilePath(Dir);
56     path::append(FilePath, FileName);
57     if (fs::exists(Twine(FilePath))) {
58       FoundPath = FilePath.str();
59       break;
60     }
61   }
62 
63   return FoundPath;
64 }
65 
66 
67 #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
68 
69 #define ALLCOLORS(FGBG,BOLD) {\
70     COLOR(FGBG, "0", BOLD),\
71     COLOR(FGBG, "1", BOLD),\
72     COLOR(FGBG, "2", BOLD),\
73     COLOR(FGBG, "3", BOLD),\
74     COLOR(FGBG, "4", BOLD),\
75     COLOR(FGBG, "5", BOLD),\
76     COLOR(FGBG, "6", BOLD),\
77     COLOR(FGBG, "7", BOLD)\
78   }
79 
80 static const char colorcodes[2][2][8][10] = {
81  { ALLCOLORS("3",""), ALLCOLORS("3","1;") },
82  { ALLCOLORS("4",""), ALLCOLORS("4","1;") }
83 };
84 
85 // This is set to true when Process::PreventCoreFiles() is called.
86 static bool coreFilesPrevented = false;
87 
88 bool Process::AreCoreFilesPrevented() {
89   return coreFilesPrevented;
90 }
91 
92 // Include the platform-specific parts of this class.
93 #ifdef LLVM_ON_UNIX
94 #include "Unix/Process.inc"
95 #endif
96 #ifdef LLVM_ON_WIN32
97 #include "Windows/Process.inc"
98 #endif
99