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LIBSCAN(3)			 Impressario			    LIBSCAN(3)

LIBRARY DESCRIPTION
     libscan provides a C Language application programming interface (API) for
     scanners.	Application programs that use libscan can retrieve data from
     any scanning device for which a corresponding scanner driver exists.

LIBRARY ACCESS
     Programs that call libscan functions must include the stdio.h and
     scanner.h header files located in the /usr/include directory.  In
     addition, the programs must link with the libscan.a and libmpc.a
     libraries located in /usr/lib.

FUNCTIONS
     Information about installed scanners
		    SCSetScanEnt
		    SCGetScanEnt
		    SCEndScanEnt

     Getting the default scanner name
		    SCDefaultScannerName

     Opening a scanning device
		    SCOpen
		    SCOpenScreen
		    SCOpenFile
		    SCClose

     Scanner specific options
		    SCOptions
		    SCHasOptions

     Scanner information
		    SCScannerName
		    SCGetMinMaxRes
		    SCGetScannerRes
		    SCGetPageSize
		    SCGetDataTypes

     Scanning state
		    SCSetup
		    SCScan
		    SCScanFD
		    SCAbort
		    SCGetStatus
		    SCGetStatusFD
		    SCGetSaveOptions
		    SCSetSaveOptions

     Scan data	    SCGetScanLine
		    SCGetScanSize
		    SCGetFD
		    SCDataReady

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LIBSCAN(3)			 Impressario			    LIBSCAN(3)

     Document Feeder
		    SCFeederGetFlags
		    SCFeederSetFlags
		    SCFeederAdvance
		    SCFeederReady

     Events	    SCGetEventFD
		    SCEventPending
		    SCGetEvent

SIGNAL HANDLING (SIGCLD)
     libscan spawns child processes to execute scanner drivers and scanner
     specific options programs.	 Some libscan functions terminate these child
     processes; within these functions, SIGCLD is blocked and libscan waits on
     the children.

     It is possible that a scanner driver or a scanner specific options
     program will terminate asynchronously.  Applications using libscan should
     be prepared to handle the SIGCLD signal.  libscan uses the POSIX signal
     handling and wait interfaces.

SEE ALSO
     scanners(1M), gscan(1), sigprocmask(2), sigaction(2), waitpid(2),
     intro(3).

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