This e-book offers information regarding kernel providers, equipment motive force operations, dossier procedure operations, subroutines, the configuration subsystem, the communications subsystem, the low functionality terminal (LFT) subsystem, the logical quantity subsystem, the M-audio catch and playback adapter subsystem, the printer subsystem, the SCSI subsystem, and the serial DASD subsystem.This ebook is a part of the six-volume technical reference set, AIX 5L model 5.2 Technical Reference, that gives details on method calls, kernel extension calls, and subroutines within the following volumes: * AIX 5L model 5.2 Technical Reference: Base working process and Extensions quantity 1 and AIX 5L model 5.2 Technical Reference: Base working approach and Extensions quantity 2 offer info on process calls, subroutines, services, macros, and statements linked to base working process runtime companies. * AIX 5L model 5.2 Technical Reference: Communications quantity 1 and AIX 5L model 5.2 Technical Reference: Communications quantity 2 supply info on access issues, services, method calls, subroutines, and operations on the topic of communications providers. * AIX 5L model 5.2 Technical Reference: Kernel and Subsystems quantity 1 and AIX 5L model 5.2 Technical Reference: Kernel and Subsystems quantity 2 offer information regarding kernel prone, equipment driving force operations, dossier method operations, subroutines, the configuration subsystem, the communications subsystem, the low functionality terminal (LFT) subsystem, the logical quantity subsystem, the M-audio seize and playback adapter subsystem, the printer subsystem, the SCSI subsystem, and the serial DASD subsystem.
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Additional resources for AIX 5L v5.2 Technical Reference: Kernel and Subsystems
2 Kernel Extensions and Device Support Programming Concepts. attach Device Queue Management Routine Purpose Provides a means for performing device-specific processing when the attchq kernel service is called. h> int attach ( dev_parms, path_id) caddr_t dev_parms; cba_id path_id; Parameters dev_parms path_id Passed to the creatd kernel service when the attach routine is defined. Specifies the path identifier for the queue being attached to. Description The attach routine is part of the Device Queue Management kernel extension.
Execution Environment The breada kernel service can be called from the process environment only. Return Values The breada service returns the address of the selected buffer’s header. A nonzero value for B_ERROR in the b_flags field of the buffer header (buf structure) indicates an error. If this occurs, the caller should release the buffer associated with the block using the brelse kernel service. Related Information The bread kernel service, iowait kernel service. The ddstrategy device driver entry point.
Indicates insufficient file system or paging space. Indicates that the user has insufficient authority to access the data or the address specified in the uaddr parameter is not valid. 2 Kernel Extensions and Device Support Programming Concepts. copyinstr64 Kernel Service Purpose Copies data between user and kernel memory. h> On the 32-bit kernel, the syntax for the copyinstr64 subroutine is: int copyinstr64 (from64, to, max, actual) unsigned long long from64; caddr_t to; uint max; uint *actual; On the 64-bit kernel, the syntax for the copyinstr64 subroutine is: int copyinstr64 (from64, to, max, actual) void *from64; void *to; size_t max; size_t *actual; Parameters from64 to 46 Specifies the address of character string to copy.