Here is a useful utility I wrote to have the system let me know when a file is not being used by anyone. It comes in handy when you have to replace a physical or logical file that's in production with the one that's been in testing. Since recompiling the file entails actually deleting the existing one, this cannot be done while someone is using it.
The Work With Object Locks (WRKOBJLCK) command will tell you who is using the file. My utility, Wait for File (WAITF), will run in the background and check every 30 seconds for you. WAITF will notify you with a break message when the file is available.
The utility ensures that the object exists and, if it does, attempts to allocate the object with a lock of *EXCL. Using the Monitor Message (MONMSG) command to determine if the allocation was successful or not is the key to how this utility works. (1 contains the WAITF command source code and 2 contains the source code for the CPP, F003CL.)
The utility ensures that the object exists and, if it does, attempts to allocate the object with a lock of *EXCL. Using the Monitor Message (MONMSG) command to determine if the allocation was successful or not is the key to how this utility works. (Figure 1 contains the WAITF command source code and Figure 2 contains the source code for the CPP, F003CL.)
If the allocation is successful, a break message is sent to the message queue from which the job was submitted. It is important to deallocate any object allocated. I do so as part of the utility, although you may wish to deallocate the object from the command line after you are done replacing or reorganizing the object.
- Andrew Longo
Accessory to WRKOBJLCK
Figure 1 The WAITF Command Source
/*==================================================================*/ /* To compile: */ /* */ /* CRTCMD CMD(XXX/WAITF) PGM(XXX/F003CL) + */ /* SRCFILE(XXX/QCMDSRC) */ /* */ /*==================================================================*/ WAITF: CMD PROMPT('Wait for File') PARM KWD(FILE) TYPE(QUAL) PROMPT('File') QUAL: QUAL TYPE(*NAME) LEN(10) MIN(1) QUAL TYPE(*NAME) LEN(10) DFT(*LIBL) + SPCVAL((*LIBL)) PROMPT('Library')
Accessory to WRKOBJLCK
Figure 2 CPP F003CL
/*==================================================================*/ /* To compile: */ /* */ /* CRTCLPGM PGM(XXX/F003CL) SRCFILE(XXX/QCLSRC) */ /* */ /*==================================================================*/ F003CL: PGM PARM(&QUALFILE) DCL VAR(&QUALFILE) TYPE(*CHAR) LEN(20) DCL VAR(&FILE) TYPE(*CHAR) LEN(10) DCL VAR(&LIB) TYPE(*CHAR) LEN(10) DCL VAR(&TYPE) TYPE(*CHAR) LEN(1) DCL VAR(&MSGQ) TYPE(*CHAR) LEN(10) DCL VAR(&MSGQLIB) TYPE(*CHAR) LEN(10) DCL VAR(&MSG) TYPE(*CHAR) LEN(40) RTVJOBA JOB(&MSGQ) TYPE(&TYPE) IF (&TYPE *EQ '1') THEN(DO) SBMJOB CMD(CALL PGM(F003CL) PARM(&QUALFILE)) + MSGQ(&MSGQ) GOTO CMDLBL(ENDPGM) ENDDO RTVJOBA SBMMSGQ(&MSGQ) SBMMSGQLIB(&MSGQLIB) CHGVAR VAR(&FILE) VALUE(%SST(&QUALFILE 1 10)) CHGVAR VAR(&LIB) VALUE(%SST(&QUALFILE 11 10)) CHKOBJ OBJ(&LIB/&FILE) OBJTYPE(*FILE) MONMSG MSGID(CPF9801) EXEC(DO) CHGVAR VAR(&MSG) VALUE('File' *BCAT &LIB *TCAT + '/' *CAT &FILE *BCAT 'was not found.') SNDBRKMSG MSG(&MSG) TOMSGQ(&MSGQLIB/&MSGQ) GOTO CMDLBL(ENDPGM) ENDDO TOP: ALCOBJ OBJ((&LIB/&FILE *FILE *EXCL)) WAIT(0) MONMSG MSGID(CPF1085 CPF1002) EXEC(DO) DLYJOB DLY(30) GOTO CMDLBL(TOP) ENDDO DLCOBJ OBJ((&LIB/&FILE *FILE *EXCL)) CHGVAR VAR(&MSG) VALUE('File' *BCAT &LIB *TCAT '/' + *CAT &FILE *BCAT 'is now available.') SNDBRKMSG MSG(&MSG) TOMSGQ(&MSGQLIB/&MSGQ) ENDPGM: ENDPGM
More than ever, there is a demand for IT to deliver innovation. Your IBM i has been an essential part of your business operations for years. However, your organization may struggle to maintain the current system and implement new projects. The thousands of customers we've worked with and surveyed state that expectations regarding the digital footprint and vision of the company are not aligned with the current IT environment.
TRY the one package that solves all your document design and printing challenges on all your platforms. Produce bar code labels, electronic forms, ad hoc reports, and RFID tags – without programming! MarkMagic is the only document design and print solution that combines report writing, WYSIWYG label and forms design, and conditional printing in one integrated product. Make sure your data survives when catastrophe hits. Request your trial now! Request Now.
Forms of ransomware has been around for over 30 years, and with more and more organizations suffering attacks each year, it continues to endure. What has made ransomware such a durable threat and what is the best way to combat it? In order to prevent ransomware, organizations must first understand how it works.
Disaster protection is vital to every business. Yet, it often consists of patched together procedures that are prone to error. From automatic backups to data encryption to media management, Robot automates the routine (yet often complex) tasks of iSeries backup and recovery, saving you time and money and making the process safer and more reliable. Automate your backups with the Robot Backup and Recovery Solution. Key features include:
Business users want new applications now. Market and regulatory pressures require faster application updates and delivery into production. Your IBM i developers may be approaching retirement, and you see no sure way to fill their positions with experienced developers. In addition, you may be caught between maintaining your existing applications and the uncertainty of moving to something new.
IT managers hoping to find new IBM i talent are discovering that the pool of experienced RPG programmers and operators or administrators with intimate knowledge of the operating system and the applications that run on it is small. This begs the question: How will you manage the platform that supports such a big part of your business? This guide offers strategies and software suggestions to help you plan IT staffing and resources and smooth the transition after your AS/400 talent retires. Read on to learn:
LATEST COMMENTS
MC Press Online