我目前正在使用 访问 Windows Netapi32，Netapi32.lib目前我正在使用c++访问 api。我在检索计算机名称时遇到问题，目前是NetFileEnum here on FILE_INFO_3structure here之一。在文档中它说，
fi3_username
指向一个字符串的指针，该字符串指定哪个用户（在具有用户级安全性的服务器上）或哪台计算机（在具有共享级安全性的服务器上）打开了资源。请注意，Windows 不支持共享级安全性。如果定义了 _WIN32_WINNT 或 FORCE_UNICODE，则此字符串为 Unicode。
现在，我运行此脚本的网络确实具有共享级别的安全性，我只是不确定如何列出计算机名称。
相关代码
图书馆包括：
#pragma comment(lib, "Netapi32.lib")
#include <stdio.h>
#include <assert.h>
#include <windows.h>
#include <lm.h>
初始化结构：
fstatus在我的代码中定义为NET_API_STATUS fStatus，它是 I/O 结构。文档在这里
如果fstatus成功返回值NERR_Success。
如果函数失败，返回值可以是以下错误代码之一。
ERROR_ACCESS_DENIED用户无权访问请求的信息。ERROR_INVALID_LEVEL为 level 参数指定的值无效。ERROR_INVALID_PARAMETER指定的参数无效。ERROR_MORE_DATA More条目可用。指定一个足够大的缓冲区来接收所有条目。- ……
更多在这里
处理我使用的if ((fStatus == NERR_Success) || (fStatus == ERROR_MORE_DATA))
找不到用户名。
fStatus = NetFileEnum(
flServerName, //Pointer to a string that specifies the DNS or NetBIOS name of the remote server on which the function is to execute. If this parameter is NULL, the local computer is used.
flBasePath, //Pointer to a string that specifies a qualifier for the returned information. If this parameter is NULL, all open resources are enumerated.
flUserName, //Pointer to a string that specifies the name of the user or the name of the connection.
dfLevel, //Pointer to a string that specifies the name of the user or the name of the connection. Can be either 2 or 3, I am using 3
(LPBYTE*)&pFile, //Pointer to the address of the buffer that receives the information. The format of this data depends on the value of the level parameter.
fwPrefMaxLen, //pecifies the preferred maximum length of returned data, in bytes.
&fwEntriesRead, //Pointer to a value that receives the count of elements actually enumerated.
&fwTotalEntries, //Pointer to a value that receives the total number of entries that could have been enumerated from the current resume position.
&fwResumeHandle); //Pointer to a value that contains a resume handle which is used to continue an existing file search.
NET_API_STATUS NetFileEnum(
_In_ LMSTR servername,
_In_ LMSTR basepath,
_In_ LMSTR username,
_In_ DWORD level,
_Out_ LPBYTE *bufptr,
_In_ DWORD prefmaxlen,
_Out_ LPDWORD entriesread,
_Out_ LPDWORD totalentries,
_Inout_ PDWORD_PTR resume_handle
);
以上的原始值：
NET_API_STATUS fStatus;
LPFILE_INFO_3 pFile = NULL;
LPFILE_INFO_3 pTmpFile;
DWORD dfLevel = 3;
LPTSTR flServerName = NULL;
LPTSTR flUserName = NULL;
LPTSTR flBasePath = NULL;
DWORD fwPrefMaxLen = MAX_PREFERRED_LENGTH;
DWORD fwEntriesRead = 0;
DWORD fwTotalEntries = 0;
DWORD fwResumeHandle = 0;
pTmpfile是第 3 级（此处的文档）缓冲区对象，
bufptr [输出]
Pointer to the address of the buffer that receives the information. The format of this data depends on the value of the levelparameter.
此缓冲区以这种格式返回数据，
typedef struct _FILE_INFO_3 {
DWORD fi3_id;
DWORD fi3_permissions;
DWORD fi3_num_locks;
LMSTR fi3_pathname;
LMSTR fi3_username;
} FILE_INFO_3, *PFILE_INFO_3, *LPFILE_INFO_3;
检索数据：
printf("\n\tComputer: %S\n", pTmpFile->fi3_username); //how do I retrieve computer name???
printf("\n\tid: %D\n", pTmpFile->fi3_id);
printf("\n\tpath: %S\n", pTmpFile->fi3_pathname);
**重要的是要注意，我已经尝试过使用 vbnet 并且它可以工作，但不知何故无法弄清楚如何在 c++ 上做到这一点。
完整的测试程序：
#ifndef UNICODE
#define UNICODE
#endif
//Initialize the NetAPI Library
#pragma comment(lib, "Netapi32.lib")
#include <stdio.h>
#include <assert.h>
#include <windows.h>
#include <lm.h>
int wmain(int argc, wchar_t *argv[])
{
//NetFile Enum, using 3 Level.
NET_API_STATUS fStatus;
LPFILE_INFO_3 pFile = NULL;
LPFILE_INFO_3 pTmpFile;
DWORD dfLevel = 3;
LPTSTR flServerName = NULL;
LPTSTR flUserName = NULL;
LPTSTR flBasePath = NULL;
DWORD fwPrefMaxLen = MAX_PREFERRED_LENGTH;
DWORD fwEntriesRead = 0;
DWORD fwTotalEntries = 0;
DWORD fwResumeHandle = 0;
DWORD fi;
//
// Check command line arguments.
// Dont need this currently.
//
do
{
fStatus = NetFileEnum(flServerName,
flBasePath,
flUserName,
dfLevel,
(LPBYTE*)&pFile,
fwPrefMaxLen,
&fwEntriesRead,
&fwTotalEntries,
&fwResumeHandle);
if ((fStatus == NERR_Success) || (fStatus == ERROR_MORE_DATA))
{
if ((pTmpFile = pFile) != NULL)
{
for (fi=0; fi < fwEntriesRead; fi++)
{
assert(pTmpFile != NULL);
if (pTmpFile == NULL)
{
fprintf(stderr, "An access violation has occurred\n");
break;
}
printf("\n\tComputer: %S", pTmpFile->fi3_username);
printf("\n\tid: %d", pTmpFile->fi3_id);
printf("\n\tpath: %s", pTmpFile->fi3_pathname);
printf("\n\tLocks: %d\n", pTmpFile->fi3_num_locks);
pTmpFile++;
fwTotalEntries++;
}
}
}
else
fprintf(stderr, "A system error has occurred: %d\n", fStatus);
//
// Free the allocated memory.
//
if (pFile != NULL)
{
NetApiBufferFree(pFile);
pFile = NULL;
}
}
//
// Continue to call NetFilEnum while
// there are more entries.
//
while (fStatus == ERROR_MORE_DATA);
if (pFile != NULL)
NetApiBufferFree(pFile);
return 0;
}
输出：
从构建：
1>------ Build started: Project: Perfmon, Configuration: Release Win32 ------
1>Compiling...
1>file_enumerate.cpp
1>Linking...
1>Generating code
1>Finished generating code
1>Embedding manifest...
1>Build log was saved at "file://...."
1>Perfmon - 0 error(s), 0 warning(s)
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
跑：
Computer: User1 //prints only username, not computername (in our system, each user has the same username)
id: 1005687
path: c:\fips\library
Computer: User2 //prints only username, not computername (in our system, each user has the same username)
id: 1005689
path: c:\fips\library\util