awk syntax for Solaris

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk syntax for Solaris
# 8  
Old 10-24-2009
It was a silly question actually, because I could have guessed that!

Anyway you have nawk, so.... bon <something French>! Smilie

Last edited by Scott; 10-24-2009 at 06:33 PM..
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Solaris

Nice syntax in csh on Solaris 10

Dear Solaris Experts, I would like to set the lowest priority when running a resource intensive program in C shell on Solaris 10 similar to the following syntax that works in Korn shell: $ nice -n 19 programHowever, I got the following error when running the same command in C shell: 9 ... (3 Replies)
Discussion started by: gjackson123
3 Replies

2. Shell Programming and Scripting

Help with the awk syntax

Hello Experts: While writing a script to help one of the posts on here, I end up writing a wrong one. I am very much eager to know how this can be corrected. Aim was to not print specified columns - lets say out of 100 fields, need to print all but 5th, 10th, 15th columns. Someone already... (13 Replies)
Discussion started by: juzz4fun
13 Replies

3. Solaris

Solaris config files syntax

I have recently been told that on a Solaris 10 system # means default settings, and that ## indicates a comment. Therefore, the following setting in the etc/default/login file #RETRIES=5 indicates that the number of failed login attempts allowed is 5. Is this true or false? Should... (5 Replies)
Discussion started by: jclarkaz
5 Replies

4. Shell Programming and Scripting

awk syntax

Hi I have a bash file which will split a big file to many small files. But I got a syntax error.H="$(head -1 CCC.tped)" awk 'print $0 > $1 ".tped"' CCC.tped for f in $(ls *.tped); do echo "$H\n" "$(cat $f)" >$f; done And -bash-4.1$ bash split awk: print $0 > $1".tped" awk: ^ syntax error... (3 Replies)
Discussion started by: zhshqzyc
3 Replies

5. Shell Programming and Scripting

Solaris bash syntax different from Linux?

I have a script that's meant to check the disk usage on a particular volume and delete the oldest logfile if it's over a certain percentage. It runs fine on a Linux machine, but on a Solaris one, I get this error: syntax error at line 3: `diskspace=$' unexpected I assume... (2 Replies)
Discussion started by: cara_k
2 Replies

6. AIX

Help with syntax using AWK

I have a file which is comma separated and has quotes. I can use this command and awk -F"," '{ if ($4=="01" print $0 }' test.txt But this doesn't fetch me the data.since it has quotes. If the data has no quotes,the above command works fine. In Unix you can skip quote \" but this doesn't work.... (7 Replies)
Discussion started by: ganesnar
7 Replies

7. Solaris

Syntax error ipfilter solaris 10

Hello everyone. I have a problem with ipfilter, you must create a rule to redirect traffic from the external network to internal server on port 443. New Rule: rdr e1000g0 from xx.xx.xx.69/32 port 443 -> port 443 tcp, use ipnat -CF -f /etc/ipnat.conf, and ipf send me from error:... (0 Replies)
Discussion started by: kadavr
0 Replies

8. UNIX for Dummies Questions & Answers

awk syntax

Little bit confusing while using awk :confused::confused: In Sed while pattern search we can use "(double quotes) i mean $a=hello $cat file.txt |sed -n "/$a/p"this thing work fine But if i use it in awk it's not working How could i do the substitution of pattern by a variables and the... (1 Reply)
Discussion started by: posix
1 Replies

9. Shell Programming and Scripting

awk syntax help

I don't get correct output when I run this command line: nmap -sP | grep -i failed | awk -F '{print $6}' I basically want it to return '' but its just showing the output of the nmap scan. (8 Replies)
Discussion started by: streetfighter2
8 Replies

10. Shell Programming and Scripting

Help with Awk Syntax

I have written many awk commands which go in multiple lines. I have this confusion many times. Some time they work if i dont terminate them with "\" but some time error. Some time in "if" statements between if and else if i dont use ";" it gives error but sometimes it doesnt. The below... (4 Replies)
Discussion started by: pinnacle
4 Replies
Login or Register to Ask a Question
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

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 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, 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 <> FILES
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
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)