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- Newsgroups: comp.soft-sys.andrew
- Path: sparky!uunet!nih-csl.dcrt.nih.gov!daedalus.dcrt.nih.gov!weisen
- From: weisen@daedalus.dcrt.nih.gov (Neil Weisenfeld)
- Subject: Question about AMDS message delivery
- Message-ID: <1992Nov13.184644.19701@alw.nih.gov>
- Sender: postman@alw.nih.gov (AMDS Postmaster)
- Organization: National Insts. of Health, DCRT, CSL
- X-Newsreader: Tin 1.1 PL4
- Date: Fri, 13 Nov 1992 18:46:44 GMT
- Lines: 29
-
-
- Our AMDS system is set up so that a number of machines may deliver the
- same message. Is there any sort of locking system used to keep them
- from stepping on each other's toes? I'm writing a biff program and it
- seems to suffer from two ailments:
-
- 1. Sometimes the user gets informed about a message twice since its
- modification time changes twice.
-
- 2. Sometimes the biff program starts scanning the message for headers
- as the message is being written and subsequently winds up hitting EOF
- before finding all of the headers.
-
-
- Now I know that I could solve #1 by keying off of the filename and not
- checking the same file twice, but how about #2? Is there some lock
- mechanism for the Mailbox directory or the message files, or is it just
- a free for all?
-
-
- Thanks,
- Neil
-
-
- --
- Neil I. Weisenfeld National Institutes of Health
- Computer Engineer Building 12A, Room 2033
- weisen@alw.nih.gov Bethesda, MD 20892
- uunet!nih-csl!weisen phone: (301) 402-2788
-