1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// Defines base::PathProviderPosix, default path provider on POSIX OSes that 6// don't have their own base_paths_OS.cc implementation (i.e. all but Mac and 7// Android). 8 9#include <ostream> 10#include <string> 11 12#include "base/base_paths.h" 13#include "base/environment.h" 14#include "base/file_util.h" 15#include "base/files/file_path.h" 16#include "base/logging.h" 17#include "base/memory/scoped_ptr.h" 18#include "base/nix/xdg_util.h" 19#include "base/path_service.h" 20#include "base/process/process_metrics.h" 21#include "build/build_config.h" 22 23#if defined(OS_FREEBSD) 24#include <sys/param.h> 25#include <sys/sysctl.h> 26#elif defined(OS_SOLARIS) 27#include <stdlib.h> 28#endif 29 30namespace base { 31 32bool PathProviderPosix(int key, FilePath* result) { 33 FilePath path; 34 switch (key) { 35 case base::FILE_EXE: 36 case base::FILE_MODULE: { // TODO(evanm): is this correct? 37#if defined(OS_LINUX) 38 FilePath bin_dir; 39 if (!file_util::ReadSymbolicLink(FilePath(kProcSelfExe), &bin_dir)) { 40 NOTREACHED() << "Unable to resolve " << kProcSelfExe << "."; 41 return false; 42 } 43 *result = bin_dir; 44 return true; 45#elif defined(OS_FREEBSD) 46 int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 }; 47 char bin_dir[PATH_MAX + 1]; 48 size_t length = sizeof(bin_dir); 49 // Upon return, |length| is the number of bytes written to |bin_dir| 50 // including the string terminator. 51 int error = sysctl(name, 4, bin_dir, &length, NULL, 0); 52 if (error < 0 || length <= 1) { 53 NOTREACHED() << "Unable to resolve path."; 54 return false; 55 } 56 *result = FilePath(FilePath::StringType(bin_dir, length - 1)); 57 return true; 58#elif defined(OS_SOLARIS) 59 char bin_dir[PATH_MAX + 1]; 60 if (realpath(getexecname(), bin_dir) == NULL) { 61 NOTREACHED() << "Unable to resolve " << getexecname() << "."; 62 return false; 63 } 64 *result = FilePath(bin_dir); 65 return true; 66#elif defined(OS_OPENBSD) 67 // There is currently no way to get the executable path on OpenBSD 68 char* cpath; 69 if ((cpath = getenv("CHROME_EXE_PATH")) != NULL) 70 *result = FilePath(cpath); 71 else 72 *result = FilePath("/usr/local/chrome/chrome"); 73 return true; 74#endif 75 } 76 case base::DIR_SOURCE_ROOT: { 77 // Allow passing this in the environment, for more flexibility in build 78 // tree configurations (sub-project builds, gyp --output_dir, etc.) 79 scoped_ptr<base::Environment> env(base::Environment::Create()); 80 std::string cr_source_root; 81 if (env->GetVar("CR_SOURCE_ROOT", &cr_source_root)) { 82 path = FilePath(cr_source_root); 83 if (base::PathExists(path)) { 84 *result = path; 85 return true; 86 } else { 87 DLOG(WARNING) << "CR_SOURCE_ROOT is set, but it appears to not " 88 << "point to a directory."; 89 } 90 } 91 // On POSIX, unit tests execute two levels deep from the source root. 92 // For example: out/{Debug|Release}/net_unittest 93 if (PathService::Get(base::DIR_EXE, &path)) { 94 *result = path.DirName().DirName(); 95 return true; 96 } 97 98 DLOG(ERROR) << "Couldn't find your source root. " 99 << "Try running from your chromium/src directory."; 100 return false; 101 } 102 case base::DIR_USER_DESKTOP: 103 *result = base::nix::GetXDGUserDirectory("DESKTOP", "Desktop"); 104 return true; 105 case base::DIR_CACHE: { 106 scoped_ptr<base::Environment> env(base::Environment::Create()); 107 FilePath cache_dir(base::nix::GetXDGDirectory(env.get(), "XDG_CACHE_HOME", 108 ".cache")); 109 *result = cache_dir; 110 return true; 111 } 112 case base::DIR_HOME: 113 *result = file_util::GetHomeDir(); 114 return true; 115 } 116 return false; 117} 118 119} // namespace base 120