by Holme » Mon, 31 Jan 2000 04:00:00
who | awk '/^'"$VALUE"'/ {print $2}'
How can I pass the $VALUE to grep without outputting it to a file and
grepping the file?
I've tried: grep foo "$VALUE"
but it crashes the script.
TIA
by Holme » Mon, 31 Jan 2000 04:00:00
> >How can I pass the $VALUE to grep without outputting it to a file and
> >grepping the file?
> Are you going to grep the string in $VALUE? If yes:
> echo $VALUE | grep WHAT
> --
> GC{S,M} d- s+:+ a18 C+++ UL++ L+++ E--- W
> P- N++ w-- O- t--- X+ b- DI+ e- h* r++ y?
by Micha? Kuratcz » Tue, 01 Feb 2000 04:00:00
--
GC{S,M} d- s+:+ a18 C+++ UL++ L+++ E--- W
P- N++ w-- O- t--- X+ b- DI+ e- h* r++ y?
by Benjamin Scot » Mon, 07 Feb 2000 04:00:00
If you are trying to search for a match on "pattern" against a file whose
name is contained in $VALUE, then simply pass the variable on the command line
where the file name would usually go:
grep pattern $VALUE
If you are trying to search for a match on "pattern" against the contents of
the variable $VALUE, then use the "echo" command to output the variable to
stdout, and pipe that through grep:
echo $VALUE | grep pattern
Hope this helps!
--
Ben Scott
Sent via Deja.com http://www.deja.com/
Before you buy.
1. How do I pass variable values from a subprocess to parent shell process?
In particular in the public domain kshell:
commands of the form:
##################################
function x {
# assign variables locally in here!
#now invoke x and see its variables as global from here
x < afile
print varaibles assigned during execution of function x
##################################
When I attempt this scenario, I cannot see any of the values for variables
that have been assigned inside function x (execept when I am inside the
function itself).
The same problem holds true if I attempt to use the anonymous function
construct:
{ block of code } < afile
I still cant see value of variables assigned in block of code.
Same again if I attempt to pipe values in:
ls | {
block of code
I still cant see value of variables assigned in block of code.
I understand there is a problem with pdksh of the form
print x | read a; print $a #This will not show value of $a.
Is this all related? I found a similar problem with bash.
Has anyone got a workaround to get values in/out between subprocess and
parent shells?
Hope this email is clear.
Hope someone can help, many thanks Nigel.
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