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Full Discussion: arithmetic in tcsh
Top Forums Shell Programming and Scripting arithmetic in tcsh Post 302199445 by gobi on Tuesday 27th of May 2008 12:29:59 AM
Old 05-27-2008
arithmetic in tcsh
Yes I know tcsh sucks for scripting and arithmetic but I have to write a script for multiple users and they all use tcsh.

I have this variable that I 'set' with but pulling numbers off of stings with

set STUFF = `grep string file | awk command`

Now I would like to add up the numbers that were pulled out. I tried (maybe rookie mistake)

@ SUM = ( `echo STUFF | awk '{print $1}'` + `echo STUFF | awk '{print $2}'` )

this returns: @: Expression Syntax. error

as a quick fix I use the the echo | awk commands to make several variables then add them up but this is ugly and not so clever.

conveniently the number of integers pulled from the file is known. Is there a nice way to do this for a known number of int? How about an unknown number?

Thanks!
gobi
 

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LEARN ABOUT SUNOS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The  following  default	shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh,
       /bin/tcsh,  /bin/zsh,  /sbin/jsh,  /sbin/sh,  /usr/bin/bash,  /usr/bin/csh,  /usr/bin/jsh,  /usr/bin/ksh,  /usr/bin/pfcsh,  /usr/bin/pfksh,
       /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.

       Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)).

FILES

       /etc/shells	       lists shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.10							    4 Jun 2001								 shells(4)
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