[C] Savoir utiliser Malloc

char * create_date;

if (GetFileTime(hFile, &ftCreate, &ftAccess, &ftWrite))	{
	FileTimeToSystemTime(&ftCreate, &stUTC); // Convert the created time to local time. set +1
	SystemTimeToTzSpecificLocalTime(NULL, &stUTC, &stLocal);

	create_date [25];
						
	sprintf((char *) create_date, "%02d/%02d/%d %02d:%02d", stLocal.wDay, stLocal.wMonth, stLocal.wYear, stLocal.wHour, stLocal.wMinute);
}
else {
	create_date = "Create error...";
}

char _GetACL() {

	DWORD dwRtnCode = 0;
	PSID pSidOwner = NULL;
	BOOL bRtnBool = TRUE;
	LPTSTR AcctName = NULL;
	LPTSTR DomainName = NULL;
	DWORD dwAcctName = 1, dwDomainName = 1;
	SID_NAME_USE eUse = SidTypeUnknown;
	PSECURITY_DESCRIPTOR pSD = NULL;
	DWORD dwErrorCode;
	char * acls_get;

// Get the owner SID of the file.
	dwRtnCode = GetSecurityInfo(hFile, SE_FILE_OBJECT, OWNER_SECURITY_INFORMATION, &pSidOwner, NULL,NULL, NULL, &pSD);

// Check GetLastError for GetSecurityInfo error condition.
	if (dwRtnCode != ERROR_SUCCESS) {
		acls_get = (char *) malloc(25);
		sprintf(acls_get, "GetSecurityInfo error: %d", GetLastError());
		return ((char) acls_get);
	}

// First call to LookupAccountSid to get the buffer sizes.
	bRtnBool = LookupAccountSid(
		  NULL,           // local computer
		  pSidOwner,
		  AcctName,
		  (LPDWORD)&dwAcctName,
		  DomainName,
		  (LPDWORD)&dwDomainName,
		  &eUse);

// Reallocate memory for the buffers.
	AcctName = (LPTSTR)GlobalAlloc(GMEM_FIXED, dwAcctName);

// Check GetLastError for GlobalAlloc error condition.
	if (AcctName == NULL) {
		acls_get = (char *) malloc(25);
		sprintf(acls_get, "GlobalAlloc error: %d", GetLastError());
		return ((char) acls_get);
	}

DomainName = (LPTSTR)GlobalAlloc(GMEM_FIXED, dwDomainName);

// Check GetLastError for GlobalAlloc error condition.
	if (DomainName == NULL) {
		acls_get = (char *) malloc(25);
		sprintf(acls_get, "GlobalAlloc error: %d", GetLastError());
		return ((char) acls_get);
	}

// Second call to LookupAccountSid to get the account name.
	bRtnBool = LookupAccountSid(
	  NULL,                   // name of local or remote computer
	  pSidOwner,              // security identifier
	  AcctName,               // account name buffer
	  (LPDWORD)&dwAcctName,   // size of account name buffer 
	  DomainName,             // domain name
	  (LPDWORD)&dwDomainName, // size of domain name buffer
	  &eUse);                 // SID type

	if (bRtnBool == FALSE) {
		  dwErrorCode = GetLastError();

		  if (dwErrorCode == ERROR_NONE_MAPPED) {
			  acls_get = (char *) malloc(45);
			  sprintf(acls_get, "Account owner not found for specified SID");
			  }
		  else {
			  acls_get = (char *) malloc(30);
			  sprintf(acls_get, "Error in LookupAccountSid: %d", dwErrorCode);
		  }
		  return ((char) acls_get);
	} 
	else if (bRtnBool == TRUE) {
		acls_get = (char *) malloc(strlen((const char *) AcctName));
		sprintf(acls_get, "%s", AcctName);
	}			

	printf("%s", acls_get);
	system("pause");
return ((char) acls_get);
}