On 23:00 07 Nov 2002, Leonard den Ottolander <[EMAIL PROTECTED]> wrote:
| > Us raw input instead:
| > while read -r line; do echo ${line}; done < somefile
[...]
| > you will get exactly that as output. Use "help read | less" at the
| > bash command line for more info.
|
| Just the switch I was looking for. Tried man read, but that doesn't state the
| -r option. Guess I'll have to use help for bash internals. Thanks.
Or "man bash".
| Still leaves me with the question whether I can pipe command output into a
| while loop. I'll have a look at the for loop as well.
Sure you can pipe to loops. Just remember that the loop will be in a subshell
so any variable settings won't have effect on the main shell. Thus:
a=1
ls | while read -r file; do a=$file; done
echo $a
will say "1". Usually if I need the loop to have effects on variables
I do this:
a=1
ls \
| { while read -r file; do a=$file; done
echo $a
}
echo $a
which will print "foo" and then "1" (if "foo" were the last listed
filename).
Cheers,
--
Cameron Simpson, DoD#743 [EMAIL PROTECTED] http://www.zip.com.au/~cs/
It's in the rich legal tradition of Apple Computer who, in their famous
suit against Microsoft and HP, claimed that the idea of ripping off
Xerox was their intellectual property.
- John Iodice <[EMAIL PROTECTED]>
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