z/OS ISPF Planning and Customizing
Previous topic | Next topic | Contents | Contact z/OS | Library | PDF


z/OS UNIX file Enqueue

z/OS ISPF Planning and Customizing
GC19-3623-00

To restrict concurrent use of a z/OS® UNIX file, ISPF edit issues this ENQ macro for the file: 
ENQ SPFEDIT,rname,E,12,SYSTEMS  (z/OS UNIX in sysplex; OextSysplexActv = '1'b)
or 
ENQ SPFEDIT,rname,E,12,SYSTEM   (z/OS UNIX not in sysplex)
where
rname
Is 12 bytes in length, made up of three 4-byte values:
  • A binary integer, which is the inode number of the file.
  • A binary integer, which is the device number of the file.
  • Four flag bytes (0-3).

    Bit 2 (of bits 0-7) of byte 3 is the Sysplex indicator. It can have one of these values:

    1
    z/OS UNIX is in a sysplex (OextSysplexActv is set ON).
    0
    z/OS UNIX is not in a sysplex (OextSysplexActv is set OFF).

This enqueue is compatible with the enqueue issued by the z/OS UNIX OEDIT command.

Parent topic: ISPF enqueue processing for data integrity

Go to the previous page Go to the next page

Notices | Terms of use | Support | Contact z/OS | zFavorites



Copyright IBM Corporation 1990, 2014