Hi Guys,

Can we get the file name of the Last Modified one from a particular
subvolume.. I know it can be done with few number of steps, but im
looking for something rather easier. It will be great if somebody can
help me out with this

Manu wrote:
>  Hi Guys,
> 
> Can we get the file name of the Last Modified one from a particular
> subvolume.. I know it can be done with few number of steps, but im
> looking for something rather easier. It will be great if somebody can
> help me out with this

I think there is no single command to do that in TACL.

If you were asking about finding the latest file in an OSS directory, I think that could be done pretty easily:

    latest=`ls -t dir_path | head -n 1`

or something close to that.  I don't know whether you could do something similar for a Guardian subvol from TACL using the OSH command:

   OSH/OUTV latest/ -c "ls -t /G/vol/subvol ~| head -n 1"

I cannot tell from the manual whether OSH can be used with OUTV, and I cannot tell from the manual whether ls -t does the right thing if you use it with a Guardian subvol.  You might experiment a little with that if you have OSS on your system.

The pure TACL solution isn't short, but I am pretty sure this will find the file with the most recent modification time:

[#def latest_file routine |body|
#frame
#push latest
#push filename
#push thismod
#push thisfile
#push subvol
#set latest 0
[sink [#argument/text subvol/subvol]]
[#set thisfile [#filenames/maximum 1/ [subvol].*]]
[#loop |while| not [#emptyv thisfile]
  |do|
  [#set thismod [#fileinfo/modification_lct/ [thisfile]]]
  [#if [#compute thismod > latest] |then|
    [#set filename [thisfile]]
    [#set latest [thismod]]
  ]
  [#set thisfile [#filenames/maximum 1,previous [thisfile]/ [subvol].*]]
]
[#result [filename]]
#unframe
]

Except for typos, I think the above will do what you want.  I cannot think of a shorter way to do it right now.  If I'm overlooking something, I hope someone else will give a better solution. 

You would run it like this:

   #push x
   [#set x [latest_file $vol.subvol]]

and it would put into x the full filename of the file in $vol.subvol that has the most recent modification time.  If the subvolume contains no files, I think that x would be empty.  Check that if it is important to how you want to use it.

Keith Dick wrote:
> Manu wrote:
>>  Hi Guys,
>> 
>> Can we get the file name of the Last Modified one from a particular
>> subvolume.. I know it can be done with few number of steps, but im
>> looking for something rather easier. It will be great if somebody can
>> help me out with this
> 
> I think there is no single command to do that in TACL.
> 
> If you were asking about finding the latest file in an OSS directory,
> I think that could be done pretty easily: 
> 
>    latest=`ls -t dir_path | head -n 1`
> 
> or something close to that.  I don't know whether you could do
> something similar for a Guardian subvol from TACL using the OSH
> command:  
> 
>   OSH/OUTV latest/ -c "ls -t /G/vol/subvol ~| head -n 1"
> 
> I cannot tell from the manual whether OSH can be used with OUTV, and

It should, when using -osstty

OSH/OUTV latest/ 2>&1 -osstty -c "ls -t /G/vol/subvol ~| head -n 1"


> I cannot tell from the manual whether ls -t does the right thing if
> you use it with a Guardian subvol.  You might experiment a little

It should, but only for physical volumes, not for virtual ones.

<snip>

Bye, Jojo

On Feb 9, 6:06=A0pm, "Joachim Schmitz" <nospam.j...@schmitz-digital.de>
wrote:
> Keith Dick wrote:
> > Manu wrote:
> >> =A0Hi Guys,
>
> >> Can we get the file name of the Last Modified one from a particular
> >> subvolume.. I know it can be done with few number of steps, but im
> >> looking for something rather easier. It will be great if somebody can
> >> help me out with this
>
> > I think there is no single command to do that in TACL.
>
> > If you were asking about finding the latest file in an OSS directory,
> > I think that could be done pretty easily:
>
> > =A0 =A0latest=3D`ls -t dir_path | head -n 1`
>
> > or something close to that. =A0I don't know whether you could do
> > something similar for a Guardian subvol from TACL using the OSH
> > command: =A0
>
> > =A0 OSH/OUTV latest/ -c "ls -t /G/vol/subvol ~| head -n 1"
>
> > I cannot tell from the manual whether OSH can be used with OUTV, and
>
> It should, when using -osstty
>
> OSH/OUTV latest/ 2>&1 -osstty -c "ls -t /G/vol/subvol ~| head -n 1"
>
> > I cannot tell from the manual whether ls -t does the right thing if
> > you use it with a Guardian subvol. =A0You might experiment a little
>
> It should, but only for physical volumes, not for virtual ones.
>
> <snip>
>
> Bye, Jojo- Hide quoted text -
>
> - Show quoted text -

Thnx for the help.