The Base Operating System constants and control block structure definitions are contained in header files in the /usr/include and /usr/include/sys directories. The major constants and control blocks and their corresponding header files are:
| /usr/include/a.out.h | Common Object File Format (COFF) structures |
| /usr/include/core.h | An include file for the /usr/include/sys/core.h header file |
| /usr/include/errno.h | An include file for the /usr/include/sys/errno.h header file |
| /usr/include/lvmrec.h | LVM record structure |
| /usr/include/sgtty.h | Line discipline structures and constants for Berkeley compatibility |
| /usr/include/signal.h | An include file for the /usr/include/sys/signal.h header file |
| /usr/include/termio.h | An include file for the /usr/include/sys/termio.h header file |
| /usr/include/termios.h | POSIX line-discipline structures and constants |
| /usr/include/xcoff.h | Extended Common Object File Format structures |
| /usr/include/sys/acct.h | Accounting structures |
| /usr/include/sys/badisk.h | Bus-attached-disk structures |
| /usr/include/sys/bbdir.h | Bad-block directory structure |
| /usr/include/sys/bootrecord.h | Boot record structure |
| /usr/include/sys/buf.h | Buffer header structures |
| /usr/include/sys/cdrom.h | CD-ROM structures |
| /usr/include/sys/cfgodm.h | Configuration object class structures |
| /usr/include/sys/configrec.h | Disk configuration record structure |
| /usr/include/sys/core.h | Core dump structure |
| /usr/include/sys/debug.h | Traceback table or procedure-end table |
| /usr/include/sys/device.h | Device switch table |
| /usr/include/sys/deviceq.h | Device queue-management structures |
| /usr/include/sys/devinfo.h | Device information structures |
| /usr/include/sys/dir.h | Directory entry structures |
| /usr/include/sys/display.h | Virtual display driver structures |
| /usr/include/sys/dump.h | Component dump table structure |
| /usr/include/sys/entuser.h | Ethernet device driver structures |
| /usr/include/sys/errids.h | Error-log record identifiers |
| /usr/include/sys/errno.h | Error codes |
| /usr/include/sys/fd.h | Diskette device driver structures |
| /usr/include/sys/file.h | File structure |
| /usr/include/sys/fstypes.h | File-system parameter table |
| /usr/include/sys/hd_psn.h | Layout of reserved space on the disk |
| /usr/include/sys/ide.h | IDE device driver structures |
| /usr/include/sys/inode.h | I-node structures |
| /usr/include/sys/intr.h | Interrupt handler structures |
| /usr/include/sys/ipc.h | Interprocess Communications (IPC) structures |
| /usr/include/sys/iplcb.h | Initial Program Load (IPL) control block structure |
| /usr/include/sys/ldr.h | Loader structures and constants |
| /usr/include/sys/low.h | Kernel Page 0 definition |
| /usr/include/sys/machine.h | Machine dependent control registers |
| /usr/include/sys/mbuf.h | Memory buffer structures |
| /usr/include/sys/mdio.h | Machine device driver structures |
| /usr/include/sys/mount.h | Mount structures |
| /usr/include/sys/mpqp.h | Multiprotocol Quad Port (MPQP) device-driver structures |
| /usr/include/sys/msg.h | Message queue structures |
| /usr/include/sys/mstsave.h | Machine State Save Area structures |
| /usr/include/sys/param.h | Process management constants |
| /usr/include/sys/pri.h | Constants for process priorities |
| /usr/include/sys/proc.h | Process table structure |
| /usr/include/sys/pseg.h | Process private segment layout |
| /usr/include/sys/reg.h | Machine-dependent registers |
| /usr/include/sys/scdisk.h | SCSI-disk device driver structures |
| /usr/include/sys/scsi.h | SCSI device driver structures |
| /usr/include/sys/seg.h | Memory management constants |
| /usr/include/sys/sem.h | Semaphore structures |
| /usr/include/sys/shm.h | Shared-memory facility structures |
| /usr/include/sys/signal.h | Signal structures and constants |
| /usr/include/sys/socketvar.h | Sockets structures |
| /usr/include/sys/stat.h | File status structure |
| /usr/include/sys/systm.h | System global declarations |
| /usr/include/sys/termio.h | Line discipline structures and constants for AIX Version 2 compatibility |
| /usr/include/sys/timer.h | Timer structures |
| /usr/include/sys/tokuser.h | Token-ring device handler structures |
| /usr/include/sys/trchkid.h | Trace hook IDs |
| /usr/include/sys/user.h | User structure or user area (ublock) |
| /usr/include/sys/utsname.h | UTSNAME structure (system name, node ID, machine ID) |
| /usr/include/sys/var.h | Runtime system parameter structure |
| /usr/include/sys/vfs.h | Virtual file system structures |
| /usr/include/sys/vnode.h | Virtual i-node (v-node) structures |
| /usr/include/sys/xcoff.h | Extended Common Object File Format structures |
| /usr/include/sys/xmalloc.h | Heap structure |
| /usr/include/sys/xmem.h | Cross memory service structures |