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From: brnstnd@kramden.acf.nyu.edu (Dan Bernstein)
Newsgroups: comp.unix.shell
Subject: Re: for loops
Message-ID: <13418:Apr1203:39:4891@kramden.acf.nyu.edu>
Date: 12 Apr 91 03:39:48 GMT
References: <27850:Apr700:08:2591@kramden.acf.nyu.edu> <54239@mirror.tmc.com> <1991Apr10.212216.24238@amc.com>
Organization: IR
Lines: 22

In article <1991Apr10.212216.24238@amc.com> stuart@tfatf.amc.com (Stuart Poulin) writes:
> In article <54239@mirror.tmc.com> kiyun@mirror.UUCP (KiYun Roe) writes:
> >I like this!  I've been looking for a simple way to do this.  I didn't
> >realize that there was a command like yes.  Is it BSD, System V, or
> >both?

I believe it appeared in v7, but I'm not sure how portable the argument
is.

> Hey! cool idea.  How about using bc and adding a step argument:

No need for bc. Step can be positive or negative here.

#!/bin/sh
# pmcount start [ num [ step ] ], num default 10, step default 1
step=`echo ${3-1} | sed 's/-/_/g'`
( echo $1 ; yes | head -${2-10} | sed 's/y/p'$step'+/' ) | dc

I suppose the yes and head could be replaced by echo and a more complex
sed script.

---Dan