Problem - Kevin Tafuro

cause any process exceeding any of the imposed limits to be terminated by the operating
system.
The first step in using job objects on Windows is to create a job control object. This
is done by calling CreateJobObject( ), which requires a set of security attributes in a
SECURITY_ATTRIBUTES structure and a name for the job object. The job object may be
created without a name, in which case other processes cannot open it, making the
job object private to the process that creates it and its children. If the job object is
created successfully, CreateJobObject( ) returns a handle to the object; otherwise, it
returns NULL, and GetLastError( ) can be used to determine what caused the failure.
With a handle to a job object in hand, restrictions can be placed on the processes
that run within the job using the SetInformationJobObject( ) function, which has the
following signature:
BOOL SetInformationJobObject(HANDLE hJob, JOBOBJECTINFOCLASS JobObjectInfoClass,
LPVOID lpJobObjectInfo, DWORD cbJobObjectInfoLength);
This function has the following arguments:
hJob
Handle to a job object created with CreateJobObject( ), or opened by name with
OpenJobObject( ).
JobObjectInfoClass
Predefined constant value used to specify the type of restriction to place on the
job object. Several constants are defined, but we are only interested in two of
them: JobObjectBasicLimitInformation and JobObjectExtendedLimitInformation.
lpJobObjectInfo
Pointer to a filled-in structure that is either a JOBOBJECT_BASIC_LIMIT_INFORMATION
or a JOBOBJECT_EXTENDED_LIMIT_INFORMATION, depending on the value specified
for JobObjectInfoClass.
cbJobObjectInfoLength
Length of the structure pointed to by lpJobObjectInfo in bytes.
For the two job object information classes that we are interested in, two data structures
are defined. The interesting fields in each structure are:
typedef struct _JOBOBJECT_BASIC_LIMIT_INFORMATION {
LARGE_INTEGER PerProcessUserTimeLimit;
LARGE_INTEGER PerJobUserTimeLimit;
DWORD LimitFlags;
DWORD ActiveProcessLimit;
} JOBOBJECT_BASIC_LIMIT_INFORMATION;
typedef struct _JOBOBJECT_EXTENDED_LIMIT_INFORMATION {
JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimitInformation;
SIZE_T ProcessMemoryLimit;
SIZE_T JobMemoryLimit;
} JOBOBJECT_EXTENDED_LIMIT_INFORMATION;
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