Windows System Programming Third Edition [Electronic resources] نسخه متنی

Example: Setting File Times

Exercise 311 enhances touch so that the new file time is a command line option, as with the actual UNIX command.

Program 3-3. touch: Setting File Times

/* Chapter 3. touch command. */
/* touch [options] files */
#include "EvryThng.h"
int _tmain (int argc, LPTSTR argv [])
{
SYSTEMTIME SysTime;
FILETIME NewFileTime;
LPFILETIME pAccessTime = NULL, pModifyTime = NULL;
HANDLE hFile;
BOOL Flags [MAX_OPTIONS], SetAccessTime, SetModTime, CreateNew;
DWORD CreateFlag;
int i, FileIndex;
FileIndex = Options (argc, argv, _T ("amc"),
&Flags [0], &Flags [1], &Flags [2], NULL);
SetAccessTime = !Flags [0];
SetModTime = !Flags [1];
CreateNew = !Flags [2];
CreateFlag = CreateNew ? OPEN_ALWAYS : OPEN_EXISTING;
for (i = FileIndex; i < argc; i++) {
hFile = CreateFile (argv [i], GENERIC_READ | GENERIC_WRITE,
0, NULL, CreateFlag, FILE_ATTRIBUTE_NORMAL, NULL);
GetSystemTime (&SysTime);
SystemTimeToFileTime (&SysTime, &NewFileTime);
if (SetAccessTime) pAccessTime = &NewFileTime;
if (SetModTime) pModifyTime = &NewFileTime;
SetFileTime (hFile, NULL, pAccessTime, pModifyTime);
CloseHandle (hFile);
}
return 0;
}