for loop in Bourne compared to Korn

[goldenradium2001]

For the for loop in the Korn shell, I know that it's possible to read from a file and use the contents of the file as input to the for loop. FOr example, the following is possible in the Korn shell:

for variable in $(< file)
do
echo $variable
done

Within file is the following:
apple
orange
pear
peach

So the output from running the for loop in Korn would be:
apple
orange
pear
peach

However, is there a way to do this on the Bourne shell or is this strictly Korn shell.

Thanks.

 

[olded]

Golden:

This works whether it's sh or ksh:

#!/bin/sh

while read variable
do
echo $variable
done < filename

 

[pavNell]

another way is

for i in `cat filename`
do
echo $i
done

 

[olded]

pavNell:

for i in `cat filename`
do
echo $i
done

is an example of a Useless Use of Cat, UUOC. If you've never heard of it before, don't feel bad. I had to ask the first time I was accused of it.

If you post in another forum such as comp.unix.shell expect to be flamed. I won't do that, but I will say that using the while loop is more efficient because you save creating a subshell for the &quot;cat&quot;.

Regards,

Ed

 

[vgersh99]

FAQ on UUOC

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vlad
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