assign a command line argument and a unix command to awk variables


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting assign a command line argument and a unix command to awk variables
# 1  
Old 08-08-2008
assign a command line argument and a unix command to awk variables

Hi ,

I have a piece of code ...wherein I need to assign the following ...
1) A command line argument to a variable
e.g origCount=ARGV[0]
2) A unix command to a variable
e.g result=`wc -l testFile.txt`

in my awk shell script

When I do this :
print "origCount" origCount --> I get the output as origCountawk
and I get a syntax error for 2)

Can you please help me with both

Thanks
SD

Last edited by jim mcnamara; 08-08-2008 at 08:23 AM.. Reason: Closed:homework
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Add command line argument

I would like to add the ability to change the message that is displayed when timer is finished. At present it just asks for the time I want for the alarm. I think what I need is another command line argument. soundfile="/usr/share/sounds/My_Sounds/Alarm-sound-buzzer.mp3"... (5 Replies)
Discussion started by: drew77
5 Replies

2. UNIX for Beginners Questions & Answers

Command line argument

Hi Guys, I'm trying to work out how to add a command line argument inside single quotes. Would anyone be able to help please as I'm going mad :) I want to be able to place the filename on command line and it then be used in a script but it needs to have quotes surrounding it. Thanks in... (4 Replies)
Discussion started by: mutley2202
4 Replies

3. Shell Programming and Scripting

How to read a two files, line by line in UNIX script and how to assign shell variable to awk ..?

Input are file and file1 file contains store.bal product.bal category.bal admin.bal file1 contains flip.store.bal ::FFFF:BADC:CD28,::FFFF:558E:11C5,6,8,2,1,::FFFF:81C8:CA8B,::FFFF:BADC:CD28,1,0,0,0,::FFFF:81C8:11C5,2,1,0,0,::FFFF:81DC:3111,1,0,1,0 store.bal.... (2 Replies)
Discussion started by: veeruasu
2 Replies

4. Shell Programming and Scripting

Specify an entire UNIX command as a command line argument

I'm trying to write a bash script called YN that looks like the following YN "Specify a question" "doThis" "doThat" where "doThis" will be executed if the answer is "y", otherwise "doThat". For example YN "Do you want to list the file dog?" "ls -al dog" "" Here's my attempt... (3 Replies)
Discussion started by: LeoKSimon
3 Replies

5. Shell Programming and Scripting

Passing value as a command line argument in awk script.

I have one working awk command line. Which taking data from the “J1202523.TXT” file and generating the “brazil.dat” file. PFB code. awk '{ DUNS = substr($0,0,9);if ( substr($0,14,3) == "089" ) print DUNS }' J1202523.TXT > Brazil.dat But now I want to pass two parameter as a command line argument... (4 Replies)
Discussion started by: humaemo
4 Replies

6. Shell Programming and Scripting

how to create variables in loop and assign filename after set command?

Hi, does anybody knows how to manage, that the filenames are assigned to a variable in a loop afer getting them with set command in a ksh, like: set B*.txt i=1 c=$# x=$((c+1)) echo "$x" while ] ; do _ftpfile$i="$"$i echo "$_ftpfile$i" i=$((i+1)) done The first echo returns,... (2 Replies)
Discussion started by: spidermike
2 Replies

7. Programming

Command Line Argument

Hi, I have a very simple C program which will run in UNIX. When i am passing * as the command line argument, i am gettig the below output. Program: #include <stdio.h> #include "mylibrary.h" int **environ; int main(int argc,char *argv) { int i; printf("\nHello... (2 Replies)
Discussion started by: dsudipta
2 Replies

8. Shell Programming and Scripting

How to get the value in last command line argument???

Say I want to get the value of last command line argument using the value in $# (or some other way if u can suggest) how do I do it?? $"$#" `$"$#"` These don't work :( (4 Replies)
Discussion started by: amit_oddey21
4 Replies

9. UNIX for Dummies Questions & Answers

array as command line argument !!!!

hello, can any help me how to can pass array as command line argument in korn shell. also how to read a array from command line. thanks spandu (2 Replies)
Discussion started by: spandu
2 Replies

10. UNIX for Dummies Questions & Answers

command line argument parsing

how to parse the command line argument to look for '@' sign and the following with '.'. In my shell script one of the argument passed is email address. I want to parse this email address to look for correct format. rmjoe123@hotmail.com has '@' sign and followed by a '.' to be more... (1 Reply)
Discussion started by: rmjoe
1 Replies
Login or Register to Ask a Question
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

NAME
a2p - Awk to Perl translator SYNOPSIS
a2p [options] [filename] DESCRIPTION
A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output. OPTIONS Options include: -D<number> sets debugging flags. -F<character> tells a2p that this awk script is always invoked with this -F switch. -n<fieldlist> specifies the names of the input fields if input does not have to be split into an array. If you were translating an awk script that processes the password file, you might say: a2p -7 -nlogin.password.uid.gid.gcos.shell.home Any delimiter can be used to separate the field names. -<number> causes a2p to assume that input will always have that many fields. -o tells a2p to use old awk behavior. The only current differences are: o Old awk always has a line loop, even if there are no line actions, whereas new awk does not. o In old awk, sprintf is extremely greedy about its arguments. For example, given the statement print sprintf(some_args), extra_args; old awk considers extra_args to be arguments to "sprintf"; new awk considers them arguments to "print". "Considerations" A2p cannot do as good a job translating as a human would, but it usually does pretty well. There are some areas where you may want to examine the perl script produced and tweak it some. Here are some of them, in no particular order. There is an awk idiom of putting int() around a string expression to force numeric interpretation, even though the argument is always integer anyway. This is generally unneeded in perl, but a2p can't tell if the argument is always going to be integer, so it leaves it in. You may wish to remove it. Perl differentiates numeric comparison from string comparison. Awk has one operator for both that decides at run time which comparison to do. A2p does not try to do a complete job of awk emulation at this point. Instead it guesses which one you want. It's almost always right, but it can be spoofed. All such guesses are marked with the comment ""#???"". You should go through and check them. You might want to run at least once with the -w switch to perl, which will warn you if you use == where you should have used eq. Perl does not attempt to emulate the behavior of awk in which nonexistent array elements spring into existence simply by being referenced. If somehow you are relying on this mechanism to create null entries for a subsequent for...in, they won't be there in perl. If a2p makes a split line that assigns to a list of variables that looks like (Fld1, Fld2, Fld3...) you may want to rerun a2p using the -n option mentioned above. This will let you name the fields throughout the script. If it splits to an array instead, the script is probably referring to the number of fields somewhere. The exit statement in awk doesn't necessarily exit; it goes to the END block if there is one. Awk scripts that do contortions within the END block to bypass the block under such circumstances can be simplified by removing the conditional in the END block and just exiting directly from the perl script. Perl has two kinds of array, numerically-indexed and associative. Perl associative arrays are called "hashes". Awk arrays are usually translated to hashes, but if you happen to know that the index is always going to be numeric you could change the {...} to [...]. Iteration over a hash is done using the keys() function, but iteration over an array is NOT. You might need to modify any loop that iterates over such an array. Awk starts by assuming OFMT has the value %.6g. Perl starts by assuming its equivalent, $#, to have the value %.20g. You'll want to set $# explicitly if you use the default value of OFMT. Near the top of the line loop will be the split operation that is implicit in the awk script. There are times when you can move this down past some conditionals that test the entire record so that the split is not done as often. For aesthetic reasons you may wish to change index variables from being 1-based (awk style) to 0-based (Perl style). Be sure to change all operations the variable is involved in to match. Cute comments that say "# Here is a workaround because awk is dumb" are passed through unmodified. Awk scripts are often embedded in a shell script that pipes stuff into and out of awk. Often the shell script wrapper can be incorporated into the perl script, since perl can start up pipes into and out of itself, and can do other things that awk can't do by itself. Scripts that refer to the special variables RSTART and RLENGTH can often be simplified by referring to the variables $`, $& and $', as long as they are within the scope of the pattern match that sets them. The produced perl script may have subroutines defined to deal with awk's semantics regarding getline and print. Since a2p usually picks correctness over efficiency. it is almost always possible to rewrite such code to be more efficient by discarding the semantic sugar. For efficiency, you may wish to remove the keyword from any return statement that is the last statement executed in a subroutine. A2p catches the most common case, but doesn't analyze embedded blocks for subtler cases. ARGV[0] translates to $ARGV0, but ARGV[n] translates to $ARGV[$n-1]. A loop that tries to iterate over ARGV[0] won't find it. ENVIRONMENT
A2p uses no environment variables. AUTHOR
Larry Wall <larry@wall.org> FILES
SEE ALSO
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
BUGS
It would be possible to emulate awk's behavior in selecting string versus numeric operations at run time by inspection of the operands, but it would be gross and inefficient. Besides, a2p almost always guesses right. Storage for the awk syntax tree is currently static, and can run out. perl v5.12.1 2010-04-26 A2P(1)