Kirk, I don't know an interface, but you can open the PDS as a sequential file and read the directory until you get ZZ (if I remember correctly). Don't know what will happen if you'll try to write it back..., but I presume that if it conforms to the PDS directory format, it will be OK.
Itschak | Itschak Mugzach | Director | SecuriTeam Software | | Email: [EMAIL PROTECTED] | Mob: +972 522 986404 | Skype: Itschak Mugzach | Web: www.Securiteam.co.il | -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Kirk Wolf Sent: Tuesday, July 29, 2008 6:14 PM To: [email protected] Subject: Statistics when writing PDS members I'm working on some code written in C++ (with some assembler) that does I/O to Unix files and z/OS datasets using the C library. The C library supports writing PDS members, but it doesn't supporting adding ISPF-style member statistics. I'm looking for suggestions on how to create statistics for a member that I add or update. Of course, I could rewrite all of the PDS I/O in assembler, but I'd rather not. It would be nice if there were a callable service that would just update the directory and add statistics, with the restriction that my code really can't require a TSO TMP or ISPF environment. Also, I assume that updating a member with statistics is expensive since it would probably have to rewrite the whole directory to expand the directory entry length. On a related question, I know that it is customary when adding or updating PDS members for code to allocate the dataset with DISP=SHR and then to use the ISPF ENQ protocols for serializing the directory and member names. Our plan is to allow this method, or to allow DISP=OLD allocation of the dataset. My question is this: which technique should be the default? Any ideas or suggestions would be appreciated. Kirk Wolf Dovetailed Technologies ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html __________ NOD32 3280 (20080718) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
