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Full Discussion: Finding larg number and add one
Top Forums Shell Programming and Scripting Finding larg number and add one Post 302256601 by radoulov on Monday 10th of November 2008 08:01:53 AM
Old 11-10-2008
Code:
sort -nr input | 
  { 
    read
    printf "%d\n" $(($REPLY+1))
    }

But some shells do not support a standalone read, others the $(()) expansion,
so you'll need something like:

Code:
sort -rn input |
  {
    read x
    printf "%d\n" `expr "$x" + 1`
    }

Some recent shells support the following syntax too:

Code:
sort -nr input |
  { 
    read 
    printf "%d\n" $((++REPLY))
    }

With zsh you can write something like this:

Code:
x=${${(n)$(<input)}[-1]}; print $((++x))

Last edited by radoulov; 11-10-2008 at 09:11 AM..
 

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LEARN ABOUT NETBSD

rarpd

RARPD(8)						    BSD System Manager's Manual 						  RARPD(8)

NAME

     rarpd -- Reverse ARP Daemon

SYNOPSIS

     rarpd [-adfl] [interface [...]]

DESCRIPTION

     rarpd services Reverse ARP requests on the Ethernet connected to interface.  Upon receiving a request, rarpd maps the target hardware address
     to an IP address via its name, which must be present in both the ethers(5) and hosts(5) databases.  If a host does not exist in both data-
     bases the translation cannot proceed and a reply will not be sent.

     In normal operation, rarpd forks a copy of itself and runs in the background.  Anomalies and errors are reported via syslog(3).

OPTIONS

     -a      Listen on all the Ethernets attached to the system.  If '-a' is omitted, an interface must be specified.

     -d      Run in debug mode, with all the output to stderr.	This option implies the -f option.

     -f      Run in the foreground.

     -l      Log all requests to syslog.

FILES

     /etc/ethers
     /etc/hosts

SEE ALSO

     bpf(4)

     Finlayson, R., Mann, T., Mogul, J.C., and Theimer, M., A Reverse Address Resolution Protocol, RFC 903.

AUTHORS

     Craig Leres (leres@ee.lbl.gov) and Steven McCanne (mccanne@ee.lbl.gov).  Lawrence Berkeley Laboratory, University of California, Berkeley,
     CA.

BSD
								 October 17, 2002							       BSD
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