Operating system experiment and code (full), operating system experiment code

Operating system experiment and code (full), operating system experiment code

Operating System is an extremely important professional course for computer-related majors, but many people do not know how to write the code during the lab course. Here we post a part of what the blogger has used, which is feasible for testing.

Question 1: create and destroy a Windows Process

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Content and requirements:

① Master the call methods for creating and destroying Windows processes, program code, and create and destroy a Word process in the program;

② It can suspend and activate the master thread of the created process;

③ View the changes in the system process list in the Windows Process Manager.

Tutorial guide:

① Process Creation API

BOOL CreateProcess(  LPCTSTR lpApplicationName,  LPTSTR lpCommandLine,  LPSECURITY_ATTRIBUTES lpProcessAttributes,  LPSECURITY_ATTRIBUTES lpThreadAttributes,  BOOL bInheritHandles,  DWORD dwCreationFlags,  LPVOID lpEnvironment,  LPCTSTR lpCurrentDirectory,  LPSTARTUPINFO lpStartupInfo,  LPPROCESS_INFORMATION lpProcessInformation);

Routine:

 1 void main( VOID ){ 2     STARTUPINFO si; 3     PROCESS_INFORMATION pi; 4     ZeroMemory( &si, sizeof(si) ); 5     si.cb = sizeof(si); 6     ZeroMemory( &pi, sizeof(pi) ); 7     // Start the child process.  8     if( !CreateProcess( NULL, // No module name (use command line).  9         "MyChildProcess", // Command line. 10         NULL,             // Process handle not inheritable. 11         NULL,             // Thread handle not inheritable. 12         FALSE,            // Set handle inheritance to FALSE. 13         0,                // No creation flags. 14         NULL,             // Use parent's environment block. 15         NULL,             // Use parent's starting directory. 16         &si,              // Pointer to STARTUPINFO structure.17         &pi )             // Pointer to PROCESS_INFORMATION structure.18         ) {19             ErrorExit( "CreateProcess failed." );20     }21     // Wait until child process exits.22     WaitForSingleObject( pi.hProcess, INFINITE );23     // Close process and thread handles. 24     CloseHandle( pi.hProcess );25     CloseHandle( pi.hThread );26 }

②Destruction Process API

BOOL TerminateProcess(  HANDLE hProcess,  UINT uExitCode);

③ Main thread of the suspended ProcessAPI

DWORD SuspendThread(  HANDLE hThread);

④ Activate the main thread of the processAPI

DWORD ResumeThread(  HANDLE hThread);

⑤ Process viewer

1 # include <iostream> 2 # include <windows. h> 3 using namespace std; 4 void main (VOID) 5 {6 STARTUPINFO si; 7 PROCESS_INFORMATION pi; 8/** 9 * enter the path of the personal word executable file 10 * ps: "\" Escape 11 **/12 TCHAR szCommandLine [] = TEXT ("D: \ Microsoft Office \ Office14 \ WINWORD. EXE "); 13 ZeroMemory (& si, sizeof (si); 14 si. cb = sizeof (si); 15 ZeroMemory (& pi, sizeof (pi); 16 if (! CreateProcess (NULL, szCommandLine, NULL, NULL, FALSE, 0, NULL, NULL, & si, & pi) 17 {18 fprintf (stderr, "process creation failed! "); 19} 20 int x; 21 while (1) 22 {23 cout <" Enter the operation to be selected: \ n1: Create Process \ n2: destruction Process \ n3: Pending Process \ n4: Activating process \ n0: exiting \ n "; 24 cin> x; 25 switch (x) 26 {27 case :28 if (CreateProcess (NULL, szCommandLine, NULL, NULL, FALSE, 0, NULL, NULL, & si, & pi) 29 fprintf (stderr, "process created successfully! "); 30 else31 cout <" process creation failed! "<Endl; 32 break; 33 case 2: 34 if (TerminateProcess (pi. hProcess, 0) 35 cout <"destruction process succeeded" <endl; 36 else 37 cout <"destruction failed! "<Endl; 38 break; 39 case :40 if (SuspendThread (pi. hThread) 41 cout <"pending process succeeded" <endl; 42 else43 cout <"pending failed" <endl; 44 break; 45 case 4: 46 if (ResumeThread (pi. hThread) 47 cout <"successful activation process" <endl; 48 else49 cout <"failed activation" <endl; 50 break; 51 case 0: 52 exit (0 ); 53 default: 54 cout <"incorrect input" <endl; 55} 56} 57}

 

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Author: xin, published in blog

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