Help with script

[GTownes]

Hi All,

Super novice at scripting looking for a little guidance. Trying to figure out how to get the lun wwn and first device file for the lun with awk. This is is what I get when I run the following command.

sudo autopath display | egrep -i 'lun wwn |/dev/dsk' | awk '{print $0}'

Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0775-0000
/dev/dsk/c19t0d6 Active
/dev/dsk/c21t0d6 Active
/dev/dsk/c23t0d6 Active
/dev/dsk/c25t0d6 Active
/dev/dsk/c27t0d6 Active
/dev/dsk/c29t0d6 Active
/dev/dsk/c31t0d6 Active
/dev/dsk/c33t0d6 Active



How can I pull just the lun wwn and first device file ?

[James R. Ferguson · Accepted solution]

Hi:

To get the lun (line) and first device file you could do:

# sudo autopath display | awk 'NR==1 {LINE=$0};NR==2 {LINE=LINE" "$1};END{print LINE}'

Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0775-0000 /dev/dsk/c19t0d6

Regards!

...JRF...

[James R. Ferguson]

Hi (again):

Actually, since I can't tell from your data whether or not 'autopath display' outputs more than that which you have shown, it would be better to do:

# sudo autopath display | awk '/^Lun WWN/ {LINE=$0;getline;LINE=LINE" "$1};END{print LINE}'

Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0775-0000 /dev/dsk/c19t0d6

Regards!

...JRF...

[GTownes]

Jeff,

Wasn't sure if all the line information was needed. Here's a full line section for a single lun.

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0737-0000
Virtual Device File : /hpap/dsk/hpap16
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d1 Active
/dev/dsk/c21t0d1 Active
/dev/dsk/c23t0d1 Active
/dev/dsk/c25t0d1 Active
/dev/dsk/c27t0d1 Active
/dev/dsk/c29t0d1 Active
/dev/dsk/c31t0d1 Active
/dev/dsk/c33t0d1 Active

==================================================================



I ran both commands, the first one just returns the dotted lines, and the second one just comes back to command prompt.

[James R. Ferguson]

Hi:

...and that's a good reason to provide not only the output you want but to offer the raw _input_. Try this:

# sudo autopath display | awk '/^Lun WWN/ {LINE=$0};/^\/dev/ {LINE=LINE" "$1;print LINE;exit}'
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0737-0000 /dev/dsk/c19t0d1

Regards!

...JRF...

[Hein van den Heuvel]

The way I read the question you'd like the first (active??) device for each Lun reported on.

So then you do not want the exit, but you do want to stop printing after a first dev line.

Try this for an awk command:

awk '/^Lun WWN/ {LINE=$0};/^\/dev/&&LINE {print LINE, $1;LINE=""}'

So if the scripts see a line starting with 'Lun', then that line is remember in variable line.

Next, if a line starts with 'dev' AND there is something true in that variable LINE, then print LINE and the first field, and clear LINE making it false.

Enjoy,
Hein.

[GTownes]

Guys, thanks for awesome responses. However, perhaps I'm doing something wrong. I'm still getting just a return prompt with no output.

I'm trying to get it to return the Lun WWN and the first device name. Here's the entire list set of luns from autopath display. I would like to just pull the Lun WWN and the first device name for each lun.

sudo autopath display

==================================================================
HPswsp Version : A.3.0F.02F.02F
==================================================================
Auto Discover : ON
==================================================================
Array Type : EVA-AA
Array WWN : 5000-1FE1-5010-64D0
Read Optimize : ON
Path Verification Period : 00:10
==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-074E-0000
Virtual Device File : /hpap/dsk/hpap11
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d2 Active
/dev/dsk/c21t0d2 Active
/dev/dsk/c23t0d2 Active
/dev/dsk/c25t0d2 Active
/dev/dsk/c27t0d2 Active
/dev/dsk/c29t0d2 Active
/dev/dsk/c31t0d2 Active
/dev/dsk/c33t0d2 Active

==================================================================

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0751-0000
Virtual Device File : /hpap/dsk/hpap12
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d3 Active
/dev/dsk/c21t0d3 Active
/dev/dsk/c23t0d3 Active
/dev/dsk/c25t0d3 Active
/dev/dsk/c27t0d3 Active
/dev/dsk/c29t0d3 Active
/dev/dsk/c31t0d3 Active
/dev/dsk/c33t0d3 Active

==================================================================

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0758-0000
Virtual Device File : /hpap/dsk/hpap13
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d4 Active
/dev/dsk/c21t0d4 Active
/dev/dsk/c23t0d4 Active
/dev/dsk/c25t0d4 Active
/dev/dsk/c27t0d4 Active
/dev/dsk/c29t0d4 Active
/dev/dsk/c31t0d4 Active
/dev/dsk/c33t0d4 Active

==================================================================

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-075B-0000
Virtual Device File : /hpap/dsk/hpap14
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d5 Active
/dev/dsk/c21t0d5 Active
/dev/dsk/c23t0d5 Active
/dev/dsk/c25t0d5 Active
/dev/dsk/c27t0d5 Active
/dev/dsk/c29t0d5 Active
/dev/dsk/c31t0d5 Active
/dev/dsk/c33t0d5 Active

==================================================================

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0775-0000
Virtual Device File : /hpap/dsk/hpap15
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d6 Active
/dev/dsk/c21t0d6 Active
/dev/dsk/c23t0d6 Active
/dev/dsk/c25t0d6 Active
/dev/dsk/c27t0d6 Active
/dev/dsk/c29t0d6 Active
/dev/dsk/c31t0d6 Active
/dev/dsk/c33t0d6 Active

==================================================================

==================================================================
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0737-0000
Virtual Device File : /hpap/dsk/hpap16
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c19t0d1 Active
/dev/dsk/c21t0d1 Active
/dev/dsk/c23t0d1 Active
/dev/dsk/c25t0d1 Active
/dev/dsk/c27t0d1 Active
/dev/dsk/c29t0d1 Active
/dev/dsk/c31t0d1 Active
/dev/dsk/c33t0d1 Active

==================================================================

==================================================================

[James R. Ferguson]

Hi (again):

It looks to me like Hein's variation returns what you want. Copying and pasting Hein's code and running it with your most recent input as posted gave me:

Lun WWN : 6005-08B4-0006-A7DB-0000-E000-074E-0000 /dev/dsk/c19t0d2
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0751-0000 /dev/dsk/c19t0d3
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0758-0000 /dev/dsk/c19t0d4
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-075B-0000 /dev/dsk/c19t0d5
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0775-0000 /dev/dsk/c19t0d6
Lun WWN : 6005-08B4-0006-A7DB-0000-E000-0737-0000 /dev/dsk/c19t0d1

Isn't this what you want?

Regards!

...JRF...

[GTownes]

Hi JRF,

Yes, thats exactly what I want it to do. I am copying and pasting the exact syntax, but for some reason its not working for me. I am not sure why its not working for me. Guess I'll keep playing around with it till I can get it to work.

Thanks for your help.


G

[James R. Ferguson]

Hi (again):

One way you would _not_ the correct output is if the target strings were preceeded by whitespace. Remember that our solutions anchored ('^') things to the beginning of a line:

/^Lun WWN/

...and...

/^\/dev/

mean that the character sequences only match if they are the first characters on a line.

I would examine your output thusly:

# sudo autopath display | cat -etv

You could be less rigorous by doing:

# awk '/Lun WWN/ {LINE=$0};/\/dev/ ...

...or better (if whitespace preceeding is allowed):

# awk '/[[:space:]]*Lun WWN/ {LINE=$0};/[[:space:]]*\/dev/ && LINE {print LINE, $1;LINE=""}'

Regards!

...JRF...

[GTownes]

Ok. Thanks