Showing results for 
Search instead for 
Do you mean 

scripting help

Trusted Contributor

scripting help



I'd like some help with a script


I have a file with the following data


         Device                 Product                   Device
---------------------- --------------------------- ---------------------
Name            Type   Vendor    ID           Rev  Ser Num      Cap (KB)
---------------------- --------------------------- ---------------------
/dev/sdbc       M(2)   EMC       SYMMETRIX    5876 110265D000   17677440
/dev/sdbd       M(3)   EMC       SYMMETRIX    5876 110265F000   53032320
/dev/sdbe       M(2)   EMC       SYMMETRIX    5876 1102705000   17677440
/dev/sdbf              DGC       RAID 5       0326 8600001D     62914560
/dev/sdbg              DGC       RAID 5       0326 8D0000AA    199229440
/dev/sdbh              DGC       RAID 5       0326 09000028     26214400
/dev/emcpoweraa        DGC       RAID 5       0326 8600001D     62914560

some lines have 6 fields and other lines have seven fields


I execute the pvs command and I want to search each lun from the EMC output and depending on the number of fields to determine what to print


  PV             VG           Fmt  Attr PSize   PFree
  /dev/emcpowerm emcvg        lvm2 a-    67.43G      0
  /dev/emcpowero VG1          lvm2 a-    16.86G  11.86G
  /dev/emcpowerp bc2eoaipp1vg lvm2 a-    50.57G   8.57G
  /dev/sda2      systemvg     lvm2 a-    33.59G      0
  /dev/sdad      emcvg        lvm2 a-    67.43G 428.00M


so I have come up with 


cat /tmp/pvs |awk 'NR>1 {sub("\/dev\/","",$1);print $1,$2,$5}' |while read PV VG PSZ


        awk -v search=${PV} '$0 ~ search {if (line != "") print line; line =$NF} {if(NF==6) {line=$1":"$4":"$5":"$NF}} {if(NF==7) {line=$1":"$5":"$6":"$NF}};END{print line}' /tmp/




it doesnt quite work because the output is the same



can someone help out with the syntax please :)





Honored Contributor

Re: scripting help



it's not a syntax issue, it's a logic issue.


For the sample data files provided, none of your lines match this line:


$0 ~ search


However for each line from the "/tmp/" file, the last line matches this check:




As such, "END{print line}" always prints the last line from that file.


You will want to revisit your logic.