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
|
// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#include "sys_info.h"
#include "crc.h"
#include "file_access.h"
#include "sys_version.h"
#include "symlink_target.h"
#include "time.h"
#include "file_io.h"
#include <ifaddrs.h>
#include <net/if.h> //IFF_LOOPBACK
#include <netpacket/packet.h> //sockaddr_ll
#include "process_exec.h"
#include <unistd.h> //getuid()
#include <pwd.h> //getpwuid_r()
using namespace zen;
Zstring zen::getLoginUser() //throw FileError
{
const uid_t userIdNo = ::getuid(); //never fails
if (userIdNo != 0) //nofail; non-root
{
std::vector<char> buf(std::max<long>(10000, ::sysconf(_SC_GETPW_R_SIZE_MAX))); //::sysconf may return long(-1)
passwd buf2 = {};
passwd* pwsEntry = nullptr;
if (::getpwuid_r(userIdNo, //uid_t uid
&buf2, //struct passwd* pwd
&buf[0], //char* buf
buf.size(), //size_t buflen
&pwsEntry) != 0) //struct passwd** result
THROW_LAST_FILE_ERROR(_("Cannot get process information."), "getpwuid_r");
if (!pwsEntry)
throw FileError(_("Cannot get process information."), L"no login found"); //should not happen?
return pwsEntry->pw_name;
}
//else: root(0) => consider as request for elevation, NOT impersonation!
//getlogin() is smarter than simply evaluating $LOGNAME! even in contexts without
//$LOGNAME, e.g. "sudo su" on Ubuntu, it returns the correct non-root user!
if (const char* loginUser = ::getlogin()) //https://linux.die.net/man/3/getlogin
if (strLength(loginUser) > 0 && !equalString(loginUser, "root"))
return loginUser;
//BUT: getlogin() can fail with ENOENT on Linux Mint: https://freefilesync.org/forum/viewtopic.php?t=8181
auto tryGetNonRootUser = [](const char* varName) -> const char*
{
if (const char* buf = ::getenv(varName)) //no extended error reporting
if (strLength(buf) > 0 && !equalString(buf, "root"))
return buf;
return nullptr;
};
//getting a little desperate: variables used by installer.sh
if (const char* userName = tryGetNonRootUser("USER")) return userName;
if (const char* userName = tryGetNonRootUser("SUDO_USER")) return userName;
if (const char* userName = tryGetNonRootUser("LOGNAME")) return userName;
//apparently the current user really IS root: https://freefilesync.org/forum/viewtopic.php?t=8405
return "root";
}
Zstring zen::getUserDescription() //throw FileError
{
const Zstring userName = getLoginUser(); //throw FileError
const Zstring computerName = []() -> Zstring //throw FileError
{
std::vector<char> buf(10000);
if (::gethostname(&buf[0], buf.size()) != 0)
THROW_LAST_FILE_ERROR(_("Cannot get process information."), "gethostname");
Zstring hostName = &buf[0];
if (endsWithAsciiNoCase(hostName, ".local")) //strip fluff (macOS) => apparently not added on Linux?
hostName = beforeLast(hostName, '.', IfNotFoundReturn::none);
return hostName;
}();
if (contains(getUpperCase(computerName), getUpperCase(userName)))
return userName; //no need for text duplication! e.g. "Zenju (Zenju-PC)"
return userName + Zstr(" (") + computerName + Zstr(')'); //e.g. "Admin (Zenju-PC)"
}
namespace
{
}
ComputerModel zen::getComputerModel() //throw FileError
{
ComputerModel cm;
try
{
auto tryGetInfo = [](const Zstring& filePath)
{
if (!fileAvailable(filePath))
return std::wstring();
try
{
const std::string stream = getFileContent(filePath, nullptr /*notifyUnbufferedIO*/); //throw FileError
return utfTo<std::wstring>(trimCpy(stream));
}
catch (const FileError& e) { throw SysError(replaceCpy(e.toString(), L"\n\n", L'\n')); } //errors should be further enriched by context info => SysError
};
cm.model = tryGetInfo("/sys/devices/virtual/dmi/id/product_name"); //throw SysError
cm.vendor = tryGetInfo("/sys/devices/virtual/dmi/id/sys_vendor"); //
//clean up:
cm.model = beforeFirst(cm.model, L'\u00ff', IfNotFoundReturn::all); //fix broken BIOS entries:
cm.vendor = beforeFirst(cm.vendor, L'\u00ff', IfNotFoundReturn::all); //0xff can be considered 0
for (const char* dummyModel :
{
"To Be Filled By O.E.M.", "Default string", "$(DEFAULT_STRING)", "Undefined", "empty", "O.E.M", "OEM", "NA",
"System Product Name", "Please change product name", "INVALID",
})
if (equalAsciiNoCase(cm.model, dummyModel))
{
cm.model.clear();
break;
}
for (const char* dummyVendor :
{
"To Be Filled By O.E.M.", "Default string", "$(DEFAULT_STRING)", "Undefined", "empty", "O.E.M", "OEM", "NA",
"System manufacturer", "OEM Manufacturer",
})
if (equalAsciiNoCase(cm.vendor, dummyVendor))
{
cm.vendor.clear();
break;
}
return cm;
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
std::wstring zen::getOsDescription() //throw FileError
{
try
{
const OsVersionDetail verDetail = getOsVersionDetail(); //throw SysError
return trimCpy(verDetail.osName + L' ' + verDetail.osVersionRaw); //e.g. "CentOS 7.8.2003"
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
Zstring zen::getRealProcessPath() //throw FileError
{
return getSymlinkRawContent("/proc/self/exe").targetPath; //throw FileError
//path does not contain symlinks => no need for ::realpath()
}
namespace
{
Zstring getUserDir() //throw FileError
{
const Zstring loginUser = getLoginUser(); //throw FileError
if (loginUser == "root")
return "/root";
else
return "/home/" + loginUser;
}
}
Zstring zen::getUserDataPath() //throw FileError
{
if (::getuid() != 0) //nofail; root(0) => consider as request for elevation, NOT impersonation
if (const char* xdgCfgPath = ::getenv("XDG_CONFIG_HOME"); //no extended error reporting
xdgCfgPath && xdgCfgPath[0] != 0)
return xdgCfgPath;
return getUserDir() + "/.config"; //throw FileError
}
Zstring zen::getUserDownloadsPath() //throw FileError
{
try
{
if (::getuid() != 0) //nofail; root(0) => consider as request for elevation, NOT impersonation
if (const auto& [exitCode, output] = consoleExecute("xdg-user-dir DOWNLOAD", std::nullopt /*timeoutMs*/); //throw SysError
exitCode == 0)
{
const Zstring& downloadsPath = trimCpy(output);
ASSERT_SYSERROR(!downloadsPath.empty());
return downloadsPath;
}
//fallback: probably correct 99.9% of the time anyway...
return getUserDir() + "/Downloads"; //throw FileError
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
|
