For loop inside awk to read and print contents of files
Hello,
I have a set of files Xfile0001 - Xfile0021, and the content of this files (one at a time) needs to be printed between some line (lines start with word "Generated") that I am extracting from another file called file7.txt and all the output goes into output.txt. First I tried creating a for loop over the Xfiles, and inside the loop the awk code, but didn't work, I understand I have to use the for loop inside the awk command, but after trying many times, I am not getting the output I am looking for.
So far this is one of the several versions I have:
So far this gives me an error, now I realized the question mark is not properly understood as 'interchangeable' character within awk, and also the print "$i" prints literally $i and not the content of the corresponding Xfile. I have recently started using more unix commands to try to do more efficiently my work, and its been very useful (whenever I get through this kind of things). I will really appreciate if someone can help me here.
By the way, the output I expect to have on output.txt should look like this:
Thank you very much,
Hi all,
In a while loop, like below...
while read line
do
read choice
case $choice in
1)
echo "xxx"
esac
done < file
why I can't run the read choice???? (3 Replies)
Hi all
Does anyone have a script that will allow me to stop inside a while read loop.
I want to pause the loop until a enter is pressed.
e.g.
While read line
do
echo something
if LINECOUNT > 40
then
read ENTER?"PRESS ENTER TO CONT..."
... (3 Replies)
Im want to print filename inside loop .. the code im using :-
Filename_1=abc_20090623_2.csv.lk
Filename_2=def_20090623_2.csv.lk
i want to extract filename till .csv eg
Filename_1=abc_20090623_2
Filename_2=def_20090623_2
How can i do this inside the for loop
... (3 Replies)
Hi,
I have 100 files in a directory.
Each file have the following format
>CtbRe01234
fdfjdhfkdfkd
>CtL2B0456
gjfgfkgjfkgjfk
>CmdrE05768
fghdjskksllfkLike this I have many files in the directory.
What I want is; rename the header content in each file such that the above file... (6 Replies)
Hi,
Need help in writing a script to read the contents of this file test
Test
00a
00b
00c
00d
00e
00f
where it need to read each line to give a display such as
form meta from dev 00a , config=Striped; add dev 00b:00f to meta 00a
Can any one help me in writing this script (2 Replies)
Hi,
I am reading file records inside a while loop,
and want to update the record when certain condition is met.
How can I update a file while being read?
I want to avoid using temporary files, copy, rename, ...
while IFS=',' read -r f1 f2
do
function(f1,f2)
if
then
<add... (1 Reply)
I have files named with different prefixes. From each I want to extract the first line containing a specific string, and then print that line along with the prefix.
I've tried to do this with a while loop, but instead of printing the prefix I print the first line of the file twice.
Files:... (3 Replies)
Hi,
This query is a part of a much more lengthy script.
I wish to look for all the files in a folder named "data" which in this case has two files i.e. plan.war and agent.properties. For all the files found under data I wish to ask the user as to where they wish copy the files to.
Below,... (14 Replies)
Discussion started by: mohtashims
14 Replies
LEARN ABOUT REDHAT
pcregrep
PCREGREP(1) General Commands Manual PCREGREP(1)NAME
pcregrep - a grep with Perl-compatible regular expressions.
SYNOPSIS
pcregrep [-Vcfhilnrsvx] pattern [file] ...
DESCRIPTION
pcregrep searches files for character patterns, in the same way as other grep commands do, but it uses the PCRE regular expression library
to support patterns that are compatible with the regular expressions of Perl 5. See pcre(3) for a full description of syntax and semantics.
If no files are specified, pcregrep reads the standard input. By default, each line that matches the pattern is copied to the standard out-
put, and if there is more than one file, the file name is printed before each line of output. However, there are options that can change
how pcregrep behaves.
Lines are limited to BUFSIZ characters. BUFSIZ is defined in <stdio.h>. The newline character is removed from the end of each line before
it is matched against the pattern.
OPTIONS -V Write the version number of the PCRE library being used to the standard error stream.
-c Do not print individual lines; instead just print a count of the number of lines that would otherwise have been printed. If sev-
eral files are given, a count is printed for each of them.
-ffilename
Read patterns from the file, one per line, and match all patterns against each line. There is a maximum of 100 patterns. Trailing
white space is removed, and blank lines are ignored. An empty file contains no patterns and therefore matches nothing.
-h Suppress printing of filenames when searching multiple files.
-i Ignore upper/lower case distinctions during comparisons.
-l Instead of printing lines from the files, just print the names of the files containing lines that would have been printed. Each
file name is printed once, on a separate line.
-n Precede each line by its line number in the file.
-r If any file is a directory, recursively scan the files it contains. Without -r a directory is scanned as a normal file.
-s Work silently, that is, display nothing except error messages. The exit status indicates whether any matches were found.
-v Invert the sense of the match, so that lines which do not match the pattern are now the ones that are found.
-x Force the pattern to be anchored (it must start matching at the beginning of the line) and in addition, require it to match the
entire line. This is equivalent to having ^ and $ characters at the start and end of each alternative branch in the regular
expression.
SEE ALSO pcre(3), Perl 5 documentation
DIAGNOSTICS
Exit status is 0 if any matches were found, 1 if no matches were found, and 2 for syntax errors or inacessible files (even if matches were
found).
AUTHOR
Philip Hazel <ph10@cam.ac.uk>
Last updated: 15 August 2001
Copyright (c) 1997-2001 University of Cambridge.
PCREGREP(1)