Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnews!smk
From: smk@cbnews.cb.att.com (stephen.m.kennedy)
Newsgroups: comp.unix.shell
Subject: Re: How to read sequentially from a file in SH (not KSH)
Message-ID: <1991Apr29.114606.152@cbnews.cb.att.com>
Date: 29 Apr 91 11:46:06 GMT
References: <1991Apr27.012336.2732@shibaya.lonestar.org> <232@bria.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 34

>In an article, afc@shibaya.lonestar.org (Augustine Cano) writes:
>
>while read VAR1 VAR2 < $FILENAME; do
>  echo $VAR1 $VAR2
>done
>
>but I keep reading the first line in the file over and over.  Nothing in
>the manual page seems to be usable in this situation.  How is this done
>under SH?  Is it possible? 

How about:

exec 3<$FILENAME
while read VAR1 VAR2 0<&3; do
  echo $VAR1 $VAR2
done
exec 3<&-
# any variable set in while loop will still be set here
# ...


or:

readit()
{
    while read VAR1 VAR2; do
        echo $VAR1 $VAR2
    done
}

readit <$FILENAME

Steve Kennedy
smk@cbosgd.att.com