UNIX GURU UNIVERSE
UNIX HOT TIP
Unix Tip 3258 - January 10, 2012
http://www.ugu.com/sui/ugu/show?tip.today
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SEARCH SEVERAL FILES
To search several files for a
string which you know sparsely,
the following searching technique
would be useful:
#grep <first part>.*<second part>.*<... part> <filenames>
or,
#ls|xargs grep <first part>.*<second part>.*<... part>
This will print all the filenames
and lines which consists of
"<first part><0 to any number of
characters><second part><0 to any
number of characters><third part>
......"
For example, you want to search a
data structure among several header
files where it has been declared
not where it is being used.
If the data structure be XYZ, then
search will be:
#grep }.*XYZ <filenames>
because you know it might be how
XYZ has been declared,
struct {
.....
.....
} XYZ
You don't know exactly how many
blank characters are there
unless you count them. But when XYZ
will be used it will be
done as follows(for example):
XYZ *xyz;
and you don't want them to find out
as they will be coming
in several header or C files.
This tip generously supported by: dipakb@cdotd.ernet.in
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