[Info-vax] Hard links on VMS ODS5 disks

[Dave Froble]

On 7/15/2023 9:32 AM, Craig A. Berry wrote:
>
> On 7/14/23 9:58 PM, Dave Froble wrote:
>> On 7/14/2023 9:48 PM, Craig A. Berry wrote:
>>>
>>> On 7/14/23 6:36 PM, Chris Townley wrote:
>>>> On 14/07/2023 22:30, gah4 wrote:
>>>
>>>>> Reminds me of, years ago, porting gnu-utils to OS/2 and finding that
>>>>> tail -f works.  I don't know if tail -f is supposed to work on VMS, though.
>>>>>
>>>>> The main target is embedded Linux, especially where the whole system
>>>>> is in flash memory.
>>>>
>>>> But type/tail does ISTR
>>>
>>> On most of the interesting cases it fails with invalid file organization.
>>>
>>
>> Works very well here.  Of course, I don't use invalid file organizations.
>>
>> :-)
>>
>
> I don't either, but the job controller does, and log files from batch
> jobs are about the only reason I would use this feature. If memory
> serves this is a well-known problem and somebody (maybe Hein?) had a fix
> in the works that never got prioritized.
>
> $ type/tail somelogfile.log
> %TYPE-W-OPENIN, error opening DSA0:[SOMEUSER]somelogfile.log;1 as input
> -SYSTEM-E-UNSUPPORTED, unsupported operation or function
> -RMS-F-ORG, invalid file organization value
> $ dir/full somelogfile.log
>
> Directory DSA0:[SOMEUSER]
>
> somelogfile.log;1             File ID:  (9158,13,0)
> Size:          900/912        Owner:    [SOMEGROUP,SOMEUSER]
> Created:    15-JUL-2023 08:23:51.37
> Modified:   15-JUL-2023 08:23:51.41 (1)
> Expires:    <None specified>
> Backup:     <No backup recorded>
> Effective:  <None specified>
> Recording:  <None specified>
> Accessed:   15-JUL-2023 08:23:51.37
> Attr Mod:   15-JUL-2023 08:23:51.41
> Data Mod:   15-JUL-2023 08:23:51.37
> Linkcount:  1
> File organization:  Sequential
> Shelved state:      Online
> Caching attribute:  Writethrough
> File attributes:    Allocation: 912, Extend: 0, Global buffer count: 0, No
> version limit
> Record format:      VFC, 2 byte header, maximum 0 bytes, longest 1024 bytes
> Record attributes:  Print file carriage control
> RMS attributes:     None
> Journaling enabled: None
> File protection:    System:RWED, Owner:RWED, Group:RE, World:
> Access Cntrl List:  None
> Client attributes:  None
>
> Total of 1 file, 900/912 blocks.

OpenVMS V7.2  on node DFE90A  15-JUL-2023 18:34:41.36  Uptime  299 05:59:05

$ t/tail netserver.log

         Connect request received at 25-OCT-2022 22:09:58.00
             from remote process AS800::"0=DFE"
             for object "SYS$COMMON:[SYSEXE]FAL.EXE"

         --------------------------------------------------------


         --------------------------------------------------------

         Connect request received at 25-OCT-2022 22:11:51.99
             from remote process AS800::"0=DFE"
             for object "SYS$COMMON:[SYSEXE]FAL.EXE"

         --------------------------------------------------------

   DFE          job terminated at 25-OCT-2022 22:16:53.76

   Accounting information:
   Buffered I/O count:           15046         Peak working set size:     490
   Direct I/O count:              1867         Peak page file size:      4051
   Page faults:                   1499         Mounted volumes:             0
   Charged CPU time:           0 00:00:17.85   Elapsed time:     0 00:07:49.56
$

NETSERVER.LOG;12              File ID:  (4619,103,0)
Size:            4/4          Owner:    [DFE]
Created:   25-OCT-2022 22:09:04.26
Revised:   25-OCT-2022 22:16:53.84 (1)
Expires:   <None specified>
Backup:    <No backup recorded>
Effective: <None specified>
Recording: <None specified>
File organization:  Sequential
Shelved state:      Online
Caching attribute:  Writethrough
File attributes:    Allocation: 4, Extend: 0, Global buffer count: 0
                     No version limit
Record format:      VFC, 2 byte header, maximum 0 bytes, longest 80 bytes
Record attributes:  Print file carriage control
RMS attributes:     None
Journaling enabled: None
File protection:    System:RWED, Owner:RWED, Group:RE, World:
Access Cntrl List:  None
Client attributes:  None

Ok, my test was on a VAX, but I doubt that has any bearing.  Don't have a clue. 
Unless you're trying to read the file while it's still open.  That doesn't work.

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
DFE Ultralights, Inc.
170 Grimplin Road
Vanderbilt, PA  15486