10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
I have written a (bash) function which generates multiple files say file1 file2 file3
now I want to reduce the generation of these three files i.e. store the output of three files in variables, and generate the same results, in-order to avoid multiple creation of files
how is that... (7 Replies)
Discussion started by: sam@sam
7 Replies
2. Shell Programming and Scripting
Trying to do so
echo "111:222:333" |awk -F: '{system("export TESTO=" $2)}'But it doesn't work (2 Replies)
Discussion started by: urello
2 Replies
3. Shell Programming and Scripting
I wrote a very simple script to understand how to call user-defined functions from within awk after reading this post.
function my_func_local {
echo "In func $1"
}
export -f my_func_local
echo $1 | awk -F"/" '{for (k=1;k<=NF;k++) {
if ($k == "a" ) {
system("my_local_func $k")
}
else{... (19 Replies)
Discussion started by: sreyan32
19 Replies
4. Shell Programming and Scripting
Hi,
I search for a string "can be any" and print the fields $4,$6 in to variables.
$ cat input
<value ='can be any' string='many' version='123'/>
<value ='xyz' string='less' version='456'/>
$ cat tried_code
SRG=`awk -F\' '{ print $4 }' input`
VER=`awk -F\' '{ print $6 }' input`
... (4 Replies)
Discussion started by: greet_sed
4 Replies
5. Shell Programming and Scripting
Using ksh to call a function which has awk script embedded.
It parses a long two element list file, filled with text numbers (I want column 2, beginning no sooner than line 45, that's the only known thing) . It's unknown where to start or end the data collection, dynamic variables will be used. ... (1 Reply)
Discussion started by: highnthemnts
1 Replies
6. Shell Programming and Scripting
Hi
I need to assign the ouput of a awk statement to two variables; below is a example of the txt file i have which I use awk against
sample file
testval,USA,loc2,testing02
testval1,GB,loc4,testing01
awk statement
awk -F , '{print $2,$3}'
USA loc2
GB loc4
I need a method where... (6 Replies)
Discussion started by: duckeggs01
6 Replies
7. Shell Programming and Scripting
Trying to finish up my script that automates some video encoding work.
Situation: There is an MKV file to be transcoded.
Problem: MKVINFO will give a bunch of output about an MKV file, included in that output are two lines I am interested in:
| + Default duration: 41.708ms (23.976 fps... (9 Replies)
Discussion started by: randyharris
9 Replies
8. Shell Programming and Scripting
Hi all,
Currently, i have a log file seperated by 'tab' and each record starting with a new line. i managed to retrieve the column that i'm interested in. (source_ip_address: xxx.xxx.xxx.xxx).
example of awk output: '{ print $43 }' assuming the field is at column 43.
10.10.10.10... (4 Replies)
Discussion started by: faelric
4 Replies
9. UNIX for Dummies Questions & Answers
Hi all,
I need some help for a command in a script with bash.
I need the output from ls in separate variables to compare them later with other files.
Example:
ls map1 gives: a.txt photo.bmp log.out gcd.sh
I would like to have that:
a1=a.txt
a2=photo.bmp
...
Thanks for the... (1 Reply)
Discussion started by: Sciencestudent
1 Replies
10. Shell Programming and Scripting
I do a lot of command line scripting to capture data from files or other command output. I've checked in a number of Unix and scripting books but for the life of me I can't find out how to asign field data from nawk output into variables that I can manipulate later. For example, reading a two... (6 Replies)
Discussion started by: steveje0711
6 Replies
English(3pm) Perl Programmers Reference Guide English(3pm)
NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)