vc++抓取系统用户名

#include <windows.h>
#include <stdio.h>
#include <lm.h>

#pragma comment (lib, "Mpr.lib")
#pragma comment (lib, "Netapi32.lib")

void getuser(char *);

void main( int argc, char *argv[ ] )
{
DWORD ret;
char username[100] = "", password[100] = "";
char server[100] = "", ipc[100] = "";
NETRESOURCE NET;

if (argc == 1) {
exit(1);
}

strncpy(server,argv[1],100);
printf("server: %s/n", server);

sprintf(ipc,"////%s//ipc$",server);

NET.lpLocalName = NULL;
NET.lpProvider = NULL;
NET.dwType = RESOURCETYPE_ANY;
NET.lpRemoteName = (char*)&ipc;

printf("setting up session... ");
ret = WNetAddConnection2(&NET,(const char *)&password,(const char *)&username,0);

if (ret != ERROR_SUCCESS)
{
printf("IPC$ connect fail./n");
exit(1);
}
else printf("IPC$ connect success./n");
getuser((char*)&server);

printf("Disconnect Server... ");
ret = WNetCancelConnection2((char*)&ipc,0,TRUE);
if (ret != ERROR_SUCCESS)
{
printf("fail./n");
exit(1);
}
else printf("success./n");
exit (0);
}

void getuser(char *server)
{
DWORD ret, read, total, resume = 0;
int i;
LPVOID buff;
char comment[255];
wchar_t wserver[100];

do {
ret = NetLocalGroupEnum(wserver, 1, (unsigned char **)&buff, MAX_PREFERRED_LENGTH, &read, &total, &resume);

if (ret != NERR_Success && ret != ERROR_MORE_DATA)
{
printf("fail/n");
break;
}
PLOCALGROUP_INFO_1 info = (PLOCALGROUP_INFO_1) buff;

for (i=0; i<read; i++) {
printf("GROUP: %S/n",info[i].lgrpi1_name);

WideCharToMultiByte(CP_ACP, 0, info[i].lgrpi1_comment , -1, comment,255,NULL,NULL);
printf("/tCOMMENT: %s/n",comment);

DWORD ret, read, total, resume = 0;
ret = NetLocalGroupGetMembers((const unsigned short*)&wserver, info[i].lgrpi1_name, 2, (unsigned char **)&buff, 1024, &read, &total, &resume);

if (ret != NERR_Success && ret != ERROR_MORE_DATA) {
printf("fail/n");
break;
}

PLOCALGROUP_MEMBERS_INFO_2 info = (PLOCALGROUP_MEMBERS_INFO_2) buff;

for (unsigned i=0; i<read; i++) {
printf("/t/t%S/n", info[i].lgrmi2_domainandname);
printf("/t/t/tSID:%d/n", info[i].lgrmi2_sid);
printf("/t/t/tSIDUSAGE:%d/n",info[i].lgrmi2_sidusage);
}
NetApiBufferFree (buff);
}

NetApiBufferFree (buff);

} while (ret == ERROR_MORE_DATA );
}