UNIX for Dummies Questions & Answers

Hi ,

I learning shell scripting..

I need to do the following in my shell script.

Search a given logfile for two\more strings.

If the the two strings are found. write it to a outputfile
if only one of the string is found, write the found string in one output file
and other in other output file.

Is it possible to do it?
pls help

Thx
Amit

Lets see if i have understood you correctly:

you search for a string of the form "<string1>\<string2>" and want to write it to a file. Then you search for strings of the form "<string1>\" or "\<string2>" and write it to another file.

This is done with pattern matching. You can use either sed or awk for that, in this case i would suggest sed because it is smaller than awk and you don't need the capabilities awk would offer.

The string "<string1>/<string2>" can be found with the regexp:

Code:

[^ ][^ ]*\\[^ ][^ ]*

This searches for one or more non-spaces ("[^ ][^ ]*") followed by a backslash followed by one or more non-spaces. The "\" has to be escaped because it has a special meaning, therefore "\\".

The second form of strings can be found by two regexps, very similar to the first one:

Code:

" \\[^ ][^ ]*" and
"[^ ][^ ]*\\ "

A space followed by a backslash followed by one or more non-spaces or one or more non-spaces followed by a backslash followed by a space.

Write the found lines to two different files and you are done.

If you need further help feel free to ask.

bakunin

Hi Bak,

Thanks for the info. I did not follow the above...

I have a file called buildlog.txt and I need to look for a particular strings
(for example)

In buildlog.txt
I am looking for string "image1" and "image2"

If the string "image1" and "image2" is found then pass it into a file1.txt
if only string "image1" & no string "image2" found then pass string "image1" to file1.txt and pass the string "image2" to file2.txt

How can I do it?

Thx

Amit