Date: Fri, 14 Oct 2005 15:24:17 -0700 From: David Kirchner <dpk@dpk.net> To: Drew Tomlinson <drew@mykitchentable.net> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Help Understanding While Loop Message-ID: <35c231bf0510141524u133f2d1bkeb46d60e112ee413@mail.gmail.com> In-Reply-To: <435027A3.8000908@mykitchentable.net> References: <435027A3.8000908@mykitchentable.net>
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On 10/14/05, Drew Tomlinson <drew@mykitchentable.net> wrote: > OK, I've been working on an sh script and I'm almost there. In the > script, I created a 'while read' loop that is doing what I want. Now I > want to keep track of how many times the loop executes. Thus I included > this line between the 'while read' and 'done' statements: > > count =3D $(( count + 1 )) > > I've tested this by adding an 'echo $count' statement in the loop and it > increments by one each time the loop runs. However when I attempt to > call $count in an 'echo' statement after the 'done', the variable is > null. Thus I assume that $count is only local to the loop and I have to > export it to make it available outside the loop? What must I do? Oh yeah, that's another side effect of using the while read method. Because it's "| while read" it's starting a subshell, so any variables are only going to exist there. You'd need to have some sort of 'echo' within the while read, and then | wc -l at the end of the while loop, or something along those lines. The IFS method someone else mentioned, in regards to 'for' loops, would probably be better all around. So you'd want: OLDIFS=3D$IFS # Note this is a single quote, return, single quote, no spaces IFS=3D' ' for i in `find etc` do done IFS=3D$OLDIFS
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