blocks|key|5556552|text|Windows|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5556553|您可以尝试使用GetComputerName和GetUserName，下面是一个示例：|CODE|5556554|#define+INFO_BUFFER_SIZE+32767
TCHAR++infoBuf[INFO_BUFFER_SIZE];
DWORD++bufCharCount+=+INFO_BUFFER_SIZE;

//+Get+and+display+the+name+of+the+computer.
if(+!GetComputerName(+infoBuf,+&bufCharCount+)+)
++printError(+TEXT("GetComputerName")+);+
_tprintf(+TEXT("\nComputer+name:++++++%25s"),+infoBuf+);+

//+Get+and+display+the+user+name.
if(+!GetUserName(+infoBuf,+&bufCharCount+)+)
++printError(+TEXT("GetUserName")+);+
_tprintf(+TEXT("\nUser+name:++++++++++%25s"),+infoBuf+);|code-block|syntax|javascript|5556555|请参阅：GetComputerName和GetUserName|5556556|Linux|5556557|使用gethostname获取计算机名(请参阅gethostname)，使用getlogin_r获取登录用户名。你可以在man+page+of+getlogin_r上查看更多信息。简单用法如下：|5556558|#include+<unistd.h>
#include+<limits.h>

char+hostname[HOST_NAME_MAX];
char+username[LOGIN_NAME_MAX];
gethostname(hostname,+HOST_NAME_MAX);
getlogin_r(username,+LOGIN_NAME_MAX);|5556559|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/library/windows/desktop/ms724295(v=vs.85).aspx|1|http://msdn.microsoft.com/en-us/library/windows/desktop/ms724432(v=vs.85).aspx|2|http://man7.org/linux/man-pages/man2/gethostname.2.html|3|http://www.unix.com/man-page/POSIX/3posix/getlogin_r/^0|0|7|0|7|F|N|B|0|0|4|F|0|K|B|1|0|0|5|0|2|B|12|A|N|B|2|1O|M|3|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1C|8|@$9|1D|A|1E|B|H]|$9|1F|A|1G|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|1H|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|1I|8|@]|D|@$9|1J|A|1K|1|1L]|$9|1M|A|1N|1|1O]]|E|$]]|$1|P|3|Q|5|6|7|1P|8|@$9|1Q|A|1R|B|C]]|D|@]|E|$]]|$1|R|3|S|5|6|7|1S|8|@$9|1T|A|1U|B|H]|$9|1V|A|1W|B|H]]|D|@$9|1X|A|1Y|1|1Z]|$9|20|A|21|1|22]]|E|$]]|$1|T|3|U|5|K|7|23|8|@]|D|@]|E|$L|M]]|$1|V|3|-4|5|6|7|24|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|12]]|13|$5|Y|Z|10|E|$11|14]]|15|$5|Y|Z|10|E|$11|16]]|17|$5|Y|Z|10|E|$11|18]]]]

Windows

You can try to use <code>GetComputerName</code> and <code>GetUserName</code>, here is a example:

<pre><code>#define INFO_BUFFER_SIZE 32767
TCHAR infoBuf[INFO_BUFFER_SIZE];
DWORD bufCharCount = INFO_BUFFER_SIZE;

// Get and display the name of the computer.
if( !GetComputerName( infoBuf, &amp;bufCharCount ) )
 printError( TEXT("GetComputerName") ); 
_tprintf( TEXT("\nComputer name: %s"), infoBuf ); 

// Get and display the user name.
if( !GetUserName( infoBuf, &amp;bufCharCount ) )
 printError( TEXT("GetUserName") ); 
_tprintf( TEXT("\nUser name: %s"), infoBuf );
</code></pre>

see: <a href="http://msdn.microsoft.com/library/windows/desktop/ms724295(v=vs.85).aspx" rel="noreferrer">GetComputerName</a>
 and <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms724432(v=vs.85).aspx" rel="noreferrer">GetUserName</a>

Linux

Use <code>gethostname</code> to get computer name(see <a href="http://man7.org/linux/man-pages/man2/gethostname.2.html" rel="noreferrer">gethostname</a>), and <code>getlogin_r</code> to get login username. You can look more information at <a href="http://www.unix.com/man-page/POSIX/3posix/getlogin_r/" rel="noreferrer">man page of getlogin_r</a>.
Simple usage as follows:

<pre><code>#include &lt;unistd.h&gt;
#include &lt;limits.h&gt;

char hostname[HOST_NAME_MAX];
char username[LOGIN_NAME_MAX];
gethostname(hostname, HOST_NAME_MAX);
getlogin_r(username, LOGIN_NAME_MAX);
</code></pre>

blocks|key|5556598|text|如果您可以使用Boost，则可以轻松获取主机名：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5556599|#include+<boost/asio/ip/host_name.hpp>
//+...+whatever+...
const+auto+host_name+=+boost::asio::ip::host_name();|code-block|syntax|javascript|5556600|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you can use Boost, you can do this to easily get the host name:

<pre><code>#include &lt;boost/asio/ip/host_name.hpp&gt;
// ... whatever ...
const auto host_name = boost::asio::ip::host_name();
</code></pre>

blocks|key|1634763|text|使用gethostname()获取计算机名称，同时支持windows和linux。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1634764|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/library/windows/desktop/ms738527(v=vs.85).aspx/|1|http://man7.org/linux/man-pages/man2/gethostname.2.html^0|2|D|R|7|0|Z|5|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]|$9|V|A|W|1|X]]|E|$]]|$1|F|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

Use <code>gethostname()</code> to get computer name, support both <a href="http://msdn.microsoft.com/library/windows/desktop/ms738527(v=vs.85).aspx/" rel="noreferrer">windows</a> and <a href="http://man7.org/linux/man-pages/man2/gethostname.2.html" rel="noreferrer">linux</a>.

blocks|key|4139060|text|关于Denis的回答，请注意用于Linux+may+not+always+work+because+the+environment+variables+may+not+be+exported+to+the+program的getenv("HOSTNAME")。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4139061|只获取计算机名称的多平台C%2B%2B代码示例(这就是在我的Win7和CentOS机器上有效的方法)：|4139062|++++char+*temp+=+0;
++++std::string+computerName;

#if+defined(WIN32)+%7C%7C+defined(_WIN32)+%7C%7C+defined(_WIN64)
++++temp+=+getenv("COMPUTERNAME");
++++if+(temp+!=+0)+{
++++++++computerName+=+temp;
++++++++temp+=+0;
++++}
#else
++++temp+=+getenv("HOSTNAME");
++++if+(temp+!=+0)+{
++++++++computerName+=+temp;
++++++++temp+=+0;
++++}+else+{
++++++++temp+=+new+char[512];
++++++++if+(gethostname(temp,+512)+==+0)+{+//+success+=+0,+failure+=+-1
++++++++++++computerName+=+temp;
++++++++}
++++++++delete+[]temp;
++++++++temp+=+0;
++++}
#endif|code-block|syntax|javascript|4139063|entityMap|0|LINK|mutability|MUTABLE|url|http://lists.freebsd.org/pipermail/freebsd-questions/2004-July/052424.html^0|33|I|M|2G|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Regarding Denis's answer, note that <code>getenv("HOSTNAME")</code> for Linux <a href="http://lists.freebsd.org/pipermail/freebsd-questions/2004-July/052424.html" rel="nofollow noreferrer">may not always work because the environment variables may not be exported to the program</a>.

Multi-platform C++ code example to fetch just the computer name (this is what worked for my Win7 and CentOS machines):

<pre><code> char *temp = 0;
 std::string computerName;

#if defined(WIN32) || defined(_WIN32) || defined(_WIN64)
 temp = getenv("COMPUTERNAME");
 if (temp != 0) {
 computerName = temp;
 temp = 0;
 }
#else
 temp = getenv("HOSTNAME");
 if (temp != 0) {
 computerName = temp;
 temp = 0;
 } else {
 temp = new char[512];
 if (gethostname(temp, 512) == 0) { // success = 0, failure = -1
 computerName = temp;
 }
 delete []temp;
 temp = 0;
 }
#endif
</code></pre>

blocks|key|1631353|text|在Linux中，您还可以使用下面的使用Posix库来检索拥有该进程的真实用户:+getuid()返回调用进程的真实用户ID。请参阅getuid+man+page|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1631354|#include+<pwd.h>
string+userName+=+"unknownUser";
//+Structure+to+store+user+info
struct+passwd+p;
//+Get+user+ID+of+the+application
uid_t+uid+=+getuid();

//+Buffer+that+contains+password+additional+information
char+pwdBuffer[ourPwdBufferSize];
//+Temporary+structure+for+reentrant+function
struct+passwd*+tempPwdPtr;

if+((getpwuid_r(uid,+&p,+pwdBuffer,+sizeof(pwdBuffer),
++++++++&tempPwdPtr))+==+0)+{
++++userName+=+p.pw_name;
}|code-block|syntax|javascript|1631355|entityMap|0|LINK|mutability|MUTABLE|url|http://man7.org/linux/man-pages/man2/getuid.2.html^0|1T|F|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

in Linux you can also use the following using Posix library to retrieve the real user that owns the process: 
getuid() returns the real user ID of the calling process.
see <a href="http://man7.org/linux/man-pages/man2/getuid.2.html" rel="nofollow noreferrer">getuid man page</a>

<pre><code>#include &lt;pwd.h&gt;
string userName = "unknownUser";
// Structure to store user info
struct passwd p;
// Get user ID of the application
uid_t uid = getuid();

// Buffer that contains password additional information
char pwdBuffer[ourPwdBufferSize];
// Temporary structure for reentrant function
struct passwd* tempPwdPtr;

if ((getpwuid_r(uid, &amp;p, pwdBuffer, sizeof(pwdBuffer),
 &amp;tempPwdPtr)) == 0) {
 userName = p.pw_name;
}
</code></pre>

I am developing an application. One of the methods needs to capture the computer name and user logged on the machine, then display both to the user. I need it to run on both Windows and Linux. What is the best way to do this?

Get Computer Name and logged user name

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在开发一个应用程序。其中一种方法需要捕获计算机名称和登录到计算机上的用户，然后将两者都显示给用户。我需要它在Windows和Linux上都能运行。做这件事最好的方法是什么？

问获取计算机名和登录的用户名
EN

回答 5

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