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/files/file_path.h"
15 #include "base/files/file_util.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
30 namespace base {
31
PathProviderPosix(int key,FilePath * result)32 bool 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 (!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 }
113 return false;
114 }
115
116 } // namespace base
117