On Tue, 05 Mar 2013 09:54:06 -0500
Dan Langille <d...@langille.org> wrote:
[...]
> > A portable way to do the same is to use the `seq` program
> >
> > for i in `seq 17 21`; do ...
> >
> > or to maintain an explicit counter:
> >
> > i=17
> > while [ $i -le 21 ]; do ...; i=$(($i+1)); done
>
> Then I tried this approach but didn't find seq at all. I tried sh,
> csh, and tcsh.
>
> But I know about jot. This does 5 numbers, starting at 17:
>
> $ jot 5 17
> 17
> 18
> 19
> 20
> 21
>
> Thus, the script becomes:
>
> $ cat test.sh
> #!/bin/sh
>
> for i in `jot 5 17` ; do echo cancel yes jobid=404${i} ; done
>
>
> $ sh ./test.sh
> cancel yes jobid=40417
> cancel yes jobid=40418
> cancel yes jobid=40419
> cancel yes jobid=40420
> cancel yes jobid=40421
Okay, it's a slip on my part: seq appears to be a GNU-ism (it's a part
of its "coreutils" [1] package and hence could be expected to be present
on any sensible system based on Linux). Conversely, jot is not to be
commonly expected on GNU/Linux systems -- for instance, in Debian, it's
available as a separate package "athena-jot", and its source download
location [2] hints that it's a part of some MIT project codenamed Athena
(not sure if it's that one related to X or something other).
Hence I would say using an explicit counter is the only truly portable
method. At least with POSIX shells.
1. http://www.gnu.org/software/coreutils/
2.
http://packages.debian.org/changelogs/pool/main/a/athena-jot/athena-jot_9.0-5/copyright
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