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import string from file A to become variable in file B

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# 1  
Old 01-24-2011
import string from file A to become variable in file B
i need to fetch string from file A into varible at file B
example:
Code:
$cat A.txt
2271

B.sh
Code:
#!/bin/sh
number=2271(from file A)
kill -9 $number

so,how can i make it happen?
Thx
Last edited by Franklin52; 01-24-2011 at 03:43 AM.. Reason: Please use code tags
# 2  
Old 01-24-2011
Try like this,

Code:
kill -9 $(cat A.txt)

# 3  
Old 01-24-2011
@pravin27: I can imagine that with such a command a user would like to check a couple of things first rather than perform a kill -9 with whatever is the content of file A.txt, no?

The usual way of doing this is using a
Code:
while read var1 var2...
do
  check stuff...
  do stuff...
done < A.txt

This User Gave Thanks to Scrutinizer For This Post:
pravin27
# 4  
Old 01-24-2011
Quote:
Originally Posted by bremboz
i need to fetch string from file A into varible at file B
Code:
#!/bin/sh

number=$(< fileA)

# 5  
Old 01-24-2011
Could this help ?


Code:
#!/bin/sh
while read number
do
if [ -z $(echo $number | tr -d "[0-9]") ]
then
kill -9 $number
else
echo "FAIL:PID contain non-numeric chatacter"
fi
done < A.txt

Last edited by pravin27; 01-24-2011 at 03:58 AM..
# 6  
Old 01-24-2011
Quote:
Originally Posted by Franklin52
Code:
#!/bin/sh

number=$(< fileA)

The POSIX alternative is
Code:
number=$(cat fileA)

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