z/OS V1R9.0 TSO/E Command Reference

ALTLIB Commandallocate fi(sysuproc) da(’id.clist’) shr reualtlib activate user(clist)Example 2Operation: Display the search order currently used to find a REXX exec or CLIST.altlib displayThe output at your terminal might be similar to the following:IKJ79322I Current search order (by DDNAME) is:IKJ79327I System-level EXEC DDNAME=SYSEXECIKJ79328I System-level CLIST DDNAME=SYSPROCExample 3Operation: Define an application-level CLIST library even if anotherapplication-level CLIST library exists, and request that messages are not to bedisplayed.altlib activate application(clist) dataset(clist.name) uncond quietATTRIBcommandUse the ATTRIB command to build a list of attributes for non-VSAM data sets thatyou intend to allocate dynamically. During the remainder of your terminal session,you can have the system refer to this list for data set attributes when you enter theALLOCATE command. The ALLOCATE command converts the attributes into DCBoperands and LABEL operands for data sets being allocated. Refer to thesubparameters of the DCB parameter in z/OS MVS JCL Reference.ATTRIB command syntaxThe ATTRIB command allocates a file with the same name as your attr_list_name.You can use the LISTALC command with the STATUS operand to list your activeattribute lists. The data set name is NULLFILE, which is also the data set name forfiles allocated with the DUMMY operand of the ALLOCATE command. Because thisis a NULLFILE allocation, it is subject to use and modification by other commands.Therefore, it is advisable to allocate those data sets for which the attribute list wasbuilt before you issue any commands that might cause NULLFILE allocation, suchas LINK or RUN.With the LIKE operand and the DCB operands on the ALLOCATE command, youdo not have to use the ATTRIB command.►►ATTRIBATTRattr_list_nameBLKSIZE(blocksize)►►BUFL(buffer_length)BUFNO(number_of_buffers)►►LRECL( logical_record_length )xnnnnnKNCP(no._of_channel_programs)►62 z/OS V1R9.0 TSO/E Command Reference