I agree! I would definitely vote for this RFE. I believe that an RFE that I created last year does overlap or possibly address this. Please take a look and vote for it if you agree that we need better PDS / PDSE support in the IBM C Library:
http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=80811 =========================================== The z/OS C library has poor support for PDS and PDS/E. Specifically, when using fopen() to read or write members, there are no facilities to: 1) obtain existing user directory entry info (read and write) 2) update user directory info (write) 3) support for DISP=SHR plus ISPF Enqueue serialization The first two of these cannot be easily worked around by user code without completely abandoning the use of the C-library for I/O. ================================================== Kirk Wolf Dovetailed Technologies http://dovetail.com On Wed, Jun 29, 2016 at 7:33 AM, John McKown <john.archie.mck...@gmail.com> wrote: > Gil, > > IMO, that is a wonderful idea. I especially endorse the latter idea of > enhancing the C runtime fopen() as a generalized way to introduce this > ability to _any_ C language code which uses fopen(). Just thinking about > it, I think this code be done most compatibly by introducing a new keyword > parameter for the "mode". Perhaps something like: > "enq=shr|old|rispf|wispf". Hopefully the first two are obvious. The "rispf" > says use DISP=SHR to allocate and issue a ISPF compatible ENQ "shared" on > the data set plus member (if specified in the filename parameter) whereas > "wispf" says use DISP=SHR to allocate and issue an ISPF compatible write > enq on the data set + member (if specified). > > It might even be nice to have a C runtime configuration parameter which > indicate what this default fopen() enque is. > > On Tue, Jun 28, 2016 at 5:27 PM, Paul Gilmartin < > 0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote: > > > Would there be much support for an RFE like this? (Would > > it be a duplicate -- the idea seems obvious?) Any > > suggested changes or paraphrases or clearer terminology? > > > > Enhance OMVS "cp" and other utilities to employ ISPF-like > > member-level serialization. This would allow OMVS to update > > PDS libraries that are othewise allocated SHR. For example: > > > > I'm editing CLIST(FOO) with z/OS ISPF Edit. From a Solaris NFS > > client, I try: > > > > user@SunOS.5.11: cd clist > > user@SunOS.5.11: date >foo > > ksh: foo: cannot create [Permission denied] > > > > ( ... which really means "data set in use".) So I CANcel my > > Edit session, then: > > > > user@SunOS.5.11: date >foo # Succeeds! > > > > NFS appears to be using ISPF serialization with member granularity. > > In my experience, FTP Server does likewise. > > > > Now, from z/OS UNIX System services: > > > > user@OS/390.25.00: date | cp /dev/fd/0 "//CLIST(foo)" > > cp: FSUM6259 target file "//CLIST(foo)": EDC5061I An error occurred > > when attempting to define a file to the system. > > > > ... CLIST is allocated; member is not in use, but "cp" doesn't know any > > better. > > I log off TSO, then: > > > > user@OS/390.25.00: date | cp /dev/fd/0 "//CLIST(foo)" # Succeeds! > > > > It's an undue burden to need to log off in order to update with OMVS > > data sets that are allocated in TSO LOGON PROC. OMVS should use > > the techniques that NFS and FTP use. > > > > If the restriction is intrinsic to the "C" Runtime, consider this > > an RFE on "C". So much the better to have a broader solution. > > > > Thanks, > > gil > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > > > > -- > "Pessimism is a admirable quality in an engineer. Pessimistic people check > their work three times, because they're sure that something won't be right. > Optimistic people check once, trust in Solis-de to keep the ship safe, then > blow everyone up." > "I think you're mistaking the word optimistic for inept." > "They've got a similar ring to my ear." > > From "Star Nomad" by Lindsay Buroker: > > Maranatha! <>< > John McKown > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
