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Re: Problem with shell script
- From: Eric Blake <ebb9 at byu dot net>
- To: Marek <mkierebi at o2 dot pl>
- Cc: cygwin at cygwin dot com
- Date: Mon, 25 Jul 2005 06:29:11 -0600
- Subject: Re: Problem with shell script
- References: <20050724191302.58251D10DB@rekin6.o2.pl>
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According to Marek on 7/24/2005 1:13 PM:
> When I put commands below in command line:
> i=1
> echo $i
> i=$(($i+1))
> echo $i
>
> everything works well (i is incremented from 1 to 2), but when I run this as a shell script the result is:
> 1+1 instead of 2
>
> How should I do incrementation in shell script?
It depends on what shell you are using. Following these directions:
> Problem reports: http://cygwin.com/problems.html
will give me a better idea what version of /bin/sh you have, and you
should also say whether you are using a #! line at the start of your
attempted script. Bash can do arithmetic expansion as required by POSIX,
ash cannot.
- --
Life is short - so eat dessert first!
Eric Blake ebb9@byu.net
volunteer cygwin bash maintainer
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