DosQuerySysState

Prototype:

APIRET APIENTRY DosQuerySysState ( ULONG func, ULONG arg1, ULONG pid, ULONG _res_, PVOID buf, ULONG bufsz ) ;

Linkage Definition:

IMPORTS Dos32QuerySysState = DOSCALLS.368

Parameters:

ULONG func Bit flag indicating which data is being requested.
ULONG arg1 Reserved. Set to zero always.
ULONG pid Process ID. See notes.
ULONG _res_ Reserved.
ULONG buf Address of buffer for results. See DOSQSS.H for the layout.
ULONG bufsz Size of result buffer.

Comments:

This function performs almost exactly the same function as the older DosQProcStat, except that the 64K limit on buffer size has been removed, all addresses are in 0:32 format, and some more information has been added.

The func parameter is a bit array, with the following meanings:

00000001 Process Data 
00000002 Process Semaphores (16-bit only?) 
00000004 Module Data 
00000008 File Data (see notes) 
00000010 Named Shared Memory

Notes:

(1) The pid parameter allows you to request information for a single process (if non-zero), or for all processes on the system. NOTE: Selection of a single process caused system hangs prior to Warp 3.0 Fixpack 18.

(2) The arg1 parameter must be set to zero, or it may cause a system crash. IBM has reported this problem fixed in APAR PJ21195.

(3) File data is only supported from Warp 3.0 Fixpack 18 onwards.

Examples:

DOSQ - Query Processes 
LSOF - List Open Files