1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
//===--- Distro.cpp - Linux distribution detection support ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Distro.h"
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Threading.h"
using namespace clang::driver;
using namespace clang;
static Distro::DistroType DetectOsRelease(llvm::vfs::FileSystem &VFS) {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
VFS.getBufferForFile("/etc/os-release");
if (!File)
File = VFS.getBufferForFile("/usr/lib/os-release");
if (!File)
return Distro::UnknownDistro;
SmallVector<StringRef, 16> Lines;
File.get()->getBuffer().split(Lines, "\n");
Distro::DistroType Version = Distro::UnknownDistro;
// Obviously this can be improved a lot.
for (StringRef Line : Lines)
if (Version == Distro::UnknownDistro && Line.startswith("ID="))
Version = llvm::StringSwitch<Distro::DistroType>(Line.substr(3))
.Case("alpine", Distro::AlpineLinux)
.Case("fedora", Distro::Fedora)
.Case("gentoo", Distro::Gentoo)
.Case("arch", Distro::ArchLinux)
// On SLES, /etc/os-release was introduced in SLES 11.
.Case("sles", Distro::OpenSUSE)
.Case("opensuse", Distro::OpenSUSE)
.Case("exherbo", Distro::Exherbo)
.Default(Distro::UnknownDistro);
return Version;
}
static Distro::DistroType DetectLsbRelease(llvm::vfs::FileSystem &VFS) {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
VFS.getBufferForFile("/etc/lsb-release");
if (!File)
return Distro::UnknownDistro;
SmallVector<StringRef, 16> Lines;
File.get()->getBuffer().split(Lines, "\n");
Distro::DistroType Version = Distro::UnknownDistro;
for (StringRef Line : Lines)
if (Version == Distro::UnknownDistro &&
Line.startswith("DISTRIB_CODENAME="))
Version = llvm::StringSwitch<Distro::DistroType>(Line.substr(17))
.Case("hardy", Distro::UbuntuHardy)
.Case("intrepid", Distro::UbuntuIntrepid)
.Case("jaunty", Distro::UbuntuJaunty)
.Case("karmic", Distro::UbuntuKarmic)
.Case("lucid", Distro::UbuntuLucid)
.Case("maverick", Distro::UbuntuMaverick)
.Case("natty", Distro::UbuntuNatty)
.Case("oneiric", Distro::UbuntuOneiric)
.Case("precise", Distro::UbuntuPrecise)
.Case("quantal", Distro::UbuntuQuantal)
.Case("raring", Distro::UbuntuRaring)
.Case("saucy", Distro::UbuntuSaucy)
.Case("trusty", Distro::UbuntuTrusty)
.Case("utopic", Distro::UbuntuUtopic)
.Case("vivid", Distro::UbuntuVivid)
.Case("wily", Distro::UbuntuWily)
.Case("xenial", Distro::UbuntuXenial)
.Case("yakkety", Distro::UbuntuYakkety)
.Case("zesty", Distro::UbuntuZesty)
.Case("artful", Distro::UbuntuArtful)
.Case("bionic", Distro::UbuntuBionic)
.Case("cosmic", Distro::UbuntuCosmic)
.Case("disco", Distro::UbuntuDisco)
.Case("eoan", Distro::UbuntuEoan)
.Case("focal", Distro::UbuntuFocal)
.Case("groovy", Distro::UbuntuGroovy)
.Case("hirsute", Distro::UbuntuHirsute)
.Case("impish", Distro::UbuntuImpish)
.Case("jammy", Distro::UbuntuJammy)
.Default(Distro::UnknownDistro);
return Version;
}
static Distro::DistroType DetectDistro(llvm::vfs::FileSystem &VFS) {
Distro::DistroType Version = Distro::UnknownDistro;
// Newer freedesktop.org's compilant systemd-based systems
// should provide /etc/os-release or /usr/lib/os-release.
Version = DetectOsRelease(VFS);
if (Version != Distro::UnknownDistro)
return Version;
// Older systems might provide /etc/lsb-release.
Version = DetectLsbRelease(VFS);
if (Version != Distro::UnknownDistro)
return Version;
// Otherwise try some distro-specific quirks for RedHat...
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
VFS.getBufferForFile("/etc/redhat-release");
if (File) {
StringRef Data = File.get()->getBuffer();
if (Data.startswith("Fedora release"))
return Distro::Fedora;
if (Data.startswith("Red Hat Enterprise Linux") ||
Data.startswith("CentOS") || Data.startswith("Scientific Linux")) {
if (Data.contains("release 7"))
return Distro::RHEL7;
else if (Data.contains("release 6"))
return Distro::RHEL6;
else if (Data.contains("release 5"))
return Distro::RHEL5;
}
return Distro::UnknownDistro;
}
// ...for Debian
File = VFS.getBufferForFile("/etc/debian_version");
if (File) {
StringRef Data = File.get()->getBuffer();
// Contents: < major.minor > or < codename/sid >
int MajorVersion;
if (!Data.split('.').first.getAsInteger(10, MajorVersion)) {
switch (MajorVersion) {
case 5:
return Distro::DebianLenny;
case 6:
return Distro::DebianSqueeze;
case 7:
return Distro::DebianWheezy;
case 8:
return Distro::DebianJessie;
case 9:
return Distro::DebianStretch;
case 10:
return Distro::DebianBuster;
case 11:
return Distro::DebianBullseye;
case 12:
return Distro::DebianBookworm;
default:
return Distro::UnknownDistro;
}
}
return llvm::StringSwitch<Distro::DistroType>(Data.split("\n").first)
.Case("squeeze/sid", Distro::DebianSqueeze)
.Case("wheezy/sid", Distro::DebianWheezy)
.Case("jessie/sid", Distro::DebianJessie)
.Case("stretch/sid", Distro::DebianStretch)
.Case("buster/sid", Distro::DebianBuster)
.Case("bullseye/sid", Distro::DebianBullseye)
.Case("bookworm/sid", Distro::DebianBookworm)
.Default(Distro::UnknownDistro);
}
// ...for SUSE
File = VFS.getBufferForFile("/etc/SuSE-release");
if (File) {
StringRef Data = File.get()->getBuffer();
SmallVector<StringRef, 8> Lines;
Data.split(Lines, "\n");
for (const StringRef &Line : Lines) {
if (!Line.trim().startswith("VERSION"))
continue;
std::pair<StringRef, StringRef> SplitLine = Line.split('=');
// Old versions have split VERSION and PATCHLEVEL
// Newer versions use VERSION = x.y
std::pair<StringRef, StringRef> SplitVer =
SplitLine.second.trim().split('.');
int Version;
// OpenSUSE/SLES 10 and older are not supported and not compatible
// with our rules, so just treat them as Distro::UnknownDistro.
if (!SplitVer.first.getAsInteger(10, Version) && Version > 10)
return Distro::OpenSUSE;
return Distro::UnknownDistro;
}
return Distro::UnknownDistro;
}
// ...and others.
if (VFS.exists("/etc/gentoo-release"))
return Distro::Gentoo;
return Distro::UnknownDistro;
}
static Distro::DistroType GetDistro(llvm::vfs::FileSystem &VFS,
const llvm::Triple &TargetOrHost) {
// If we don't target Linux, no need to check the distro. This saves a few
// OS calls.
if (!TargetOrHost.isOSLinux())
return Distro::UnknownDistro;
// True if we're backed by a real file system.
const bool onRealFS = (llvm::vfs::getRealFileSystem() == &VFS);
// If the host is not running Linux, and we're backed by a real file
// system, no need to check the distro. This is the case where someone
// is cross-compiling from BSD or Windows to Linux, and it would be
// meaningless to try to figure out the "distro" of the non-Linux host.
llvm::Triple HostTriple(llvm::sys::getProcessTriple());
if (!HostTriple.isOSLinux() && onRealFS)
return Distro::UnknownDistro;
if (onRealFS) {
// If we're backed by a real file system, perform
// the detection only once and save the result.
static Distro::DistroType LinuxDistro = DetectDistro(VFS);
return LinuxDistro;
}
// This is mostly for passing tests which uses llvm::vfs::InMemoryFileSystem,
// which is not "real".
return DetectDistro(VFS);
}
Distro::Distro(llvm::vfs::FileSystem &VFS, const llvm::Triple &TargetOrHost)
: DistroVal(GetDistro(VFS, TargetOrHost)) {}
|
