I think there are two answers here. First, you seem to be asking how to access a variable-variable name. In other words, I want to define a variable name with a variable since I don't know something about the code before it runs. Try this:
Second, you seem to want this so you can grab the last field from the original input.
Hi,
Can i pass a parameter(not a file name) as a parameter to a awk program?
eg;
$awk -f test 1 2 3
here test is the filename...and 1,2,3 are the i/p parameters?
thank you:-) (2 Replies)
Hi,
My script takes in one input parameter($1-email id) on the command line...
The script contains something like this...
awk '$1 == 400' abc.log >def.log
mail -s subject $1 <def.log
abc.log looks something like this...
300 222 330 123 445
400 098 890 727 663
How do i make the... (3 Replies)
hi guys
i need your help , i wrote one script which is as below
#!/bin/ksh
###########################################################
LOGDIR=/export/home/xyz/logs
EMAILFile=$LOGDIR/xxs_email.log
BOX=$(uname -a | awk '{print $2}')
awk '{if ($4 >= 30) {print $1 " " $3 " HAS LAG of "... (1 Reply)
Hi All,
I am trying to pass a parameter to AWK on my KSH shell prompt as below.
var1=2
echo $var1
awk -v var2=${var1} '{print var2}' testfile.txt
I am passing the input file (testfile) to awk to get some o/p. It is having 10 records.
When I run AWK, it is throwing the following errors... (1 Reply)
Hi
var=0001
I want to replace 2nd field of file with variable var in file sample.txt
Please suggest with awk. dont want to use awk -v option.
pseudo code : something like this.
var=0001
awk '{ 12193 /var } {print $0 }' sample.txt (2 Replies)
In below script parameterwhich i am passing to awk function is not working.Not sure why its not accepting parameter.Please tell me how to pass parameter to the awk function.Please check the below script.
#!/bin/ksh
dummy_file=/etlapps/dev/data/sub_servicer_data/ScriptLogs/emp.txt
fields=5... (2 Replies)
Hi,
I have a situation where I need to create a SQL statement using Unix script for each value in first field (ID). The file looks like this.
Id,TARGET_FIELD_NAME,SOURCE_FIELD_NAME
1,Test_Rate,Field1
1,Test_Factor,Field2
1,Test_Size,Field3
2,Test_Rate,Field4
2,Test_Factor,Field5... (3 Replies)
Can I specify a default value to a variable in AWK like BASH in one statement using parameter substitution?
BASH example:
argument=${$1-"default if empty"} (BASH)
I know I can do:
argument=$1; sub ( "^$", "default if empty", argument) (AWK)
Mike (13 Replies)
Discussion started by: Michael Stora
13 Replies
LEARN ABOUT POSIX
libbash
LIBBASH(7) libbash Manual LIBBASH(7)NAME
libbash -- A bash shared libraries package.
DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
want to load and use in scripts of your own.
It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.
Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded
using
ldbash(1) must answer 4 requirments:
1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).
2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library
exports. I.e. all the function that will be usable after loading that library will be listed in that line.
3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are
required for our library. I.e. every bash library that is in use in our bash library must be listed there.
4. The library must be listed (For more information, see ldbashconfig(8)).
Basic guidelines for writing library of your own:
1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.
2. Try to declare all variables intended for internal use as local.
3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
__<library_name>_
For example, internal function myfoosort of hashstash library should be named as
__hashstash_myfoosort
This helps to avoid conflicts in global name space when using libraries that come from different vendors.
4. See html manual for full version of this guide.
AUTHORS
Hai Zaar <haizaar@haizaar.com>
Gil Ran <ril@ran4.net>
SEE ALSO ldbash(1), ldbashconfig(8), getopts(1), hashstash(1)colors(1)messages(1)urlcoding(1)locks(1)Linux Epoch Linux