Array thats not working

[sumncguy]

The script
#! /bin/ksh
#
set -x
n=0
snmpwalk -c xxxxx yyyyy system | while IFS=read line
do
arrayname[$n]=$line
n=$(( $n + 1 ))
echo $(arrayname[0])
done

The a portion of the output w/set -x enabled
+ n=0
+ snmpwalk -c tmedomain4 192.168.63.247 system
+ line
+ IFS=read
sysDescr.0 = STRING: Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version 12.4(3b), RELEASE SOFTWARE (fc3)
+ arrayname[0]=
+ n=1
+ arrayname[0]
ter[9]: arrayname[0]: not found
+ echo

+ line
+ IFS=read
Technical Support:

http://www.cisco.com/techsupport

+ arrayname[1]=
+ n=2
+ arrayname[0]
ter[9]: arrayname[0]: not found
+ echo


I need to learn how to use arrays. It would make my life alot easier. But I just cant see what Im doing wrong here.

I want to put the contents of the snmp response into an array, then be able to print or assign its value to a variable.

SunOS xxxxx 5.8 Generic_108528-15 sun4u sparc SUNW,UltraSPARC-IIi-cEngine and running the script in KSH.

Can someone show me the light ?

Thanks

 

[cspilman]

What about:

#!/bin/ksh

n=0
set -A arrayname `snmpwalk -c xxxxx yyyyy system`

while [ ${n} -le ${#arrayname[@]} ]
do
   echo ${arrayname[${n}]}
   ((n=n+1))
done

Regards,
Chuck

 

[cspilman]

Sorry, but I should of included quotes around the snmpwalk command like this:

#!/bin/ksh

n=0
set -A arrayname [COLOR=#ff0000][b]"[/b][/color]`snmpwalk -c xxxxx yyyyy system`[COLOR=#ff0000][b]"[/b][/color]

while [ ${n} -le ${#arrayname[@]} ]
do
   echo ${arrayname[${n}]}
   ((n=n+1))
done

Regards,
Chuck

 

[cspilman]

...and one last thing. I should have -lt instead of -le like this:

#!/bin/ksh

n=0
set -A arrayname "`snmpwalk -c xxxxx yyyyy system`"

while [ ${n} [COLOR=red][b]-lt[/b][/color] ${#arrayname[@]} ]
do
   echo ${arrayname[${n}]}
   ((n=n+1))
done

Regards,
Chuck

 

[cspilman]

I think I will go get my morning coffee before I post anymore...

Regards,
Chuck

 

[kHz]

You can shorten some things like:
${arrayname[${n}]} cam be ${arrayname[n]}

and

((n=n+1)) can be ((n+=1))

# set -A arrayname $(ls /tmp) might give you 30 files.
# arrayNum=${#arrayname[@]} will give you the number of files.
# ${#arrayname[2]} will give you the length of the 3rd filename in the array. Count starts at zero.

${arrayname[@]} is the same as "1" "2" "3"
while
${arrayname[*]} is the same as "1 2 3"

Pick up the O'Reilly "Learning the Korn Shell" book. It addresses everything you need in programming the korn shell.

 

[feherke]

Hi

((n=n+1)) can be ((n+=1))

((n++))

Feherke.

http://rootshell.be/~feherke/