Unix Tip: ONE STEP AT A TIME WITH !!

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3455 - July 26, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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ONE STEP AT A TIME WITH !!

For example using C shell I want
to edit a handful of files that
contain the string "ProcessInput"
in my current directory.

Step 1:
Find the files which uses "ProcessInput"

% grep "ProcessInput" *.c
a.c:ProcessInput ( int a )
b.c:Description : ProcessInput is used to process the input
given by the user
b.c:Call ProcessInput to perform ...
c.c:val = ProcessInput(2) ;
c.c:val = ProcessInput(3) ;

Step 2:
Extract the filenames on the left.
$!! | awk -F: '{print $1}'
a.c
b.c
b.c
c.c
c.c

step 3:
Remove the duplicates
!! | sort -u

Step 4:
Now edit it !
vi `!!`

which runs vi `grep "ProcessInput" *.c | awk -F: '{print $1}'
| sort -u`

This tip generously supported by: desikann@future.futsoft.com

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