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Full Discussion: Using arguments
Top Forums Shell Programming and Scripting Using arguments Post 302569550 by jsoper1 on Monday 31st of October 2011 04:38:20 PM
Old 10-31-2011
Using arguments
I have a SNMP agent that sends three arguments to the script to get a value at the end. The first is the LeafNumber, second is the request type (SET, GET, GETNEXT), and the last is a string that represents some value to be set(used only for set requests).

The agent string looks like this:

Code:
extension 1 OctetString readonly /etc/motdpass.sh

So it makes the first agument variable(ARGV)=1
The second would be "GET" or "GETNEXT"

In the manual for the SNMP agent it gives a $ARGV[0,1, or 2] in their perl script example, but how would this look in a shell script? Would it just be $1, $2, or $3? This is what I have so far.

Code:
#!/bin/sh
# Shell script to pull primary ESA out of a file

FILENAME= /etc/motd

# Do work
extPrimEsa= grep "Primary ESA" $FILENAME|cut -d\= -f2

if [ $ARGV[0] -eq 1 ]; then 
	# OID queried is 1.3.6.1.4.1.546.14.1.0
	if [ $ARGV[1] = "GET" ]; then
	echo extPrimEsa
	fi
fi

I need to go through 8 different variables, but once I have this one down and working, I'll add the rest in. Am I doing this right?
 

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LEARN ABOUT MOJAVE

snmptable

SNMPTABLE(1)							     Net-SNMP							      SNMPTABLE(1)

NAME

       snmptable - retrieve an SNMP table and display it in tabular form

SYNOPSIS

       snmptable [COMMON OPTIONS] [-Cb] [-CB] [-Ch] [-CH] [-Ci] [-Cf STRING] [-Cw WIDTH] AGENT TABLE-OID

DESCRIPTION

       snmptable  is  an  SNMP application that repeatedly uses the SNMP GETNEXT or GETBULK requests to query for information on a network entity.
       The parameter TABLE-OID must specify an SNMP table.

       snmptable is an SNMP application that repeatedly uses the SNMP GETNEXT or GETBULK requests to query for	information on a  network  entity.
       The parameter TABLE-OID must specify an SNMP table.

       AGENT  identifies  a  target SNMP agent, which is instrumented to monitor the gievn objects.  At its simplest, the AGENT specification will
       consist of a hostname or an IPv4 address.  In this situation, the command will attempt communication with the agent, using UDP/IPv4 to port
       161 of the given target host. See snmpcmd(1) for a full list of the possible formats for AGENT.

OPTIONS

       COMMON OPTIONS
	       Please see snmpcmd(1) for a list of possible values for COMMON OPTIONS as well as their descriptions.

       -Cb     Display only a brief heading. Any common prefix of the table field names will be deleted.

       -CB     Do not use GETBULK requests to retrieve data, only GETNEXT.

       -Cc CHARS
	       Print table in columns of CHARS characters width.

       -Cf STRING
	       The string STRING is used to separate table columns.  With this option, each table entry will be printed in compact form, just with
	       the string given to separate the columns (useful if you want to import it into a database).  Otherwise  it  is  printed	in  nicely
	       aligned columns.

       -Ch     Display only the column headings.

       -CH     Do not display the column headings.

       -Ci     This option prepends the index of the entry to all printed lines.

       -Cl     Left justify the data in each column.

       -Cr REPEATERS
	       For  GETBULK requests, REPEATERS specifies the max-repeaters value to use.  For GETNEXT requests, REPEATERS specifies the number of
	       entries to retrieve at a time.

       -Cw WIDTH
	       Specifies the width of the lines when the table is printed.  If the lines will be longer, the table will be printed in sections	of
	       at  most WIDTH characters.  If WIDTH is less than the length of the contents of a single column, then that single column will still
	       be printed.

       Note that snmptable REQUIRES  an argument specifying the agent to query and exactly one OID argument, as described in the snmpcmd(1) manual
       page.  This OID must be that of a MIB table object.

EXAMPLES

       $ snmptable -v 2c -c public localhost at.atTable

       SNMP table: at.atTable RFC1213-MIB::atTable

       atIfIndex   atPhysAddress   atNetAddress
	       1  8:0:20:20:0:ab 130.225.243.33

       $ snmptable -v 2c -c public -Cf + localhost at.atTable

       SNMP table: at.atTable

       atIfIndex+atPhysAddress+atNetAddress 1+8:0:20:20:0:ab+130.225.243.33

       $ snmptable localhost -Cl -CB -Ci -OX -Cb -Cc 16 -Cw 64 ifTable

       SNMP table: ifTable

       Index	       Descr	       Type	       Mtu
       Speed	       PhysAddress     AdminStatus     OperStatus
       LastChange      InOctets        InUcastPkts     InNUcastPkts
       InDiscards      InErrors        InUnknownProtos OutOctets
       OutUcastPkts    OutNUcastPkts   OutDiscards     OutErrors
       OutQLen	       Specific

       index: [1]
       1	       lo	       softwareLoopbac 16436
       10000000 		       up	       up
       ?	       2837283786      3052466	       ?
       0	       0	       ?	       2837283786
       3052466	       ?	       0	       0
       0	       zeroDotZero

       index: [2]
       2	       eth0	       ethernetCsmacd  1500
       10000000        0:5:5d:d1:f7:cf up	       up
       ?	       2052604234      44252973        ?
       0	       0	       ?	       149778187
       65897282        ?	       0	       0
       0	       zeroDotZero

BUGS

       The  test  for  TABLE-OID  actually  specifying	a table is rather heuristic.  Note also that the test requires the defining MIB file to be
       loaded.

SEE ALSO

       snmpcmd(1), variables(5).

V5.6.2.1							    06 Sep 2003 						      SNMPTABLE(1)
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