Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

awk - value assignment.

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk - value assignment.
# 1  
Old 12-30-2004
Data awk - value assignment.
I am facing a strange situation with awk.
If I do variable substitution for substr it gives value starting from 9th char to
the end of record. Following is the command.
awk -v offset=9 -v length=4 '{ print substr($0,offset,length) }' filename

But for the same if I ommit assignment & harcode values in, it works as expected.
Following is the command
awk '{ print substr($0,9,4) }' filename

Can anyone tell me, where am I getting wrong?
# 2  
Old 12-30-2004
Don't use an awk reserved word as a variable name. Switch to xlength or something.
# 3  
Old 12-31-2004
MySQL
Good point to learn
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Optimize multiple awk variable assignment

how can i optimize the following: TOTALRESULT="total1=4 total2=9 total3=89 TMEMORY=1999" TOTAL1=$(echo "${TOTALRESULT}" | egrep "total1=" | awk -F"=" '{print $NF}') TOTAL2=$(echo "${TOTALRESULT}" | egrep "total2=" | awk -F"=" '{print $NF}') TOTAL3=$(echo... (4 Replies)
Discussion started by: SkySmart
4 Replies

2. Shell Programming and Scripting

[awk] printing value of a variable assignment from a file

Heyas Me try to print only the value of a (specific) variable assignment from a file. What i get (1): :) tui $ bin/tui-conf-get ~/.tui_rc TUI_THEME dot-blue "" "$TUI_DIR_INSTALL_ROOT/usr" "$TUI_DIR_INSTALL_ROOT/etc/tui" "$TUI_PREFIX/share/doc/tui" "$TUI_PREFIX/share/tui"... (2 Replies)
Discussion started by: sea
2 Replies

3. Shell Programming and Scripting

Variable assignment inside awk

Hi, Was hoping someone could help with the following: while read line; do pntadm -P $line | awk '{if (( $2 == 00 && $1 != 00 ) || ( $2 == 04 )) print $3,$5}'; done < /tmp/subnet_list Anyone know if it is possible to assign $3 and $5 to separate variables within the {} brackets? Thanks... (14 Replies)
Discussion started by: CiCa
14 Replies

4. Homework & Coursework Questions

Help Assignment !! :D

Q-1 Write a shell script in Unix that lists files from your current working directory · By modification time when called with lm · By access time when called with la. By default, the script should show the listing of all the files in the current directory. Q-2 Write a shell script which... (1 Reply)
Discussion started by: Vishank Parikh
1 Replies

5. Shell Programming and Scripting

awk variable assignment-- inside braces or not?

So, in awk, I've always put my variable assignments inside of the curly braces, just like dad, and grandpa, and the 26 generations before them. But today I came upon an awk statement that had them outside the braces-- blasphemy! Seriously, though, is there any practical difference? I was... (3 Replies)
Discussion started by: treesloth
3 Replies

6. Shell Programming and Scripting

AWK Variable assignment issue Ksh script

Hi There, I am writing a ksh script which assigns variable values from file "A" and passes that variables to file "B". While passing the parameters an additional "$" sign is being assigned to awk -v option. Could any one help me with this please. #!/bin/ksh head -1... (3 Replies)
Discussion started by: Jeevanm
3 Replies

7. Shell Programming and Scripting

awk conditional assignment

Dear all, I want to use awk to read the three columns in a file called "test" and change them to ( 1.5 1.5 1.5) if any element is found to be greater than three. A part of the file is shown below: (0.478318 0.391032 -0.14054) (0.45562 0.392523 -0.121685) (0.437204 0.392811 -0.106158)... (3 Replies)
Discussion started by: mfmohdyasin
3 Replies

8. Shell Programming and Scripting

variable assignment using awk

Guys, Could you please help me out. I need two values in two variables using awk from the o/p of grep. example:- grep sdosanjh <filename> sdosanjh myhostname myfilename NOW WHAT I WANT IS :- sdosanjh should be in variable (say NAME) myhostname should be in variable (say... (8 Replies)
Discussion started by: sdosanjh
8 Replies

9. UNIX for Dummies Questions & Answers

how to do my assignment?????

my lecturer want to do an assignment about telnet server..first, he want us to download the telnet server..then he want we do about copy files and share files by using the telnet server....what is that??? and one more thing is how to do 'ping'???? (1 Reply)
Discussion started by: amelia
1 Replies

10. Shell Programming and Scripting

awk variable assignment in a file

Hi All, I have a little awk script which uses a variable (x): awk -v x=0 'NF != 6 { ++x } END { print "This batch had " x " errors out of ", NR" records"}' But when I've tried to put the command in a file I can't seem to declare the variable. I've managed to simplify the code so that I... (4 Replies)
Discussion started by: pondlife
4 Replies
Login or Register to Ask a Question