How to read sequentially from a file in SH (not KSH)
stephen.m.kennedy
smk at cbnews.cb.att.com
Mon Apr 29 21:46:06 AEST 1991
>In an article, afc at 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 at cbosgd.att.com
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