Sponsored Content
Top Forums Shell Programming and Scripting Script to match strings that sometimes are splitted in 2 lines Post 302846853 by Ophiuchus on Monday 26th of August 2013 02:34:09 AM
Old 08-26-2013
Hello Scrutinizer,

Many thanks for your help! I'll practice with substr() in order to manipulate the output.

How many variables to include more patterns support awk?

Thanks in advance.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl script to match a pattern and print lines

Hi I have a file (say 'file1')and I want to search for a first occurence of pattern (say 'ERROR') and print ten lines in the file below pattern. I have to code it in PERL and I am using Solaris 5.9. I appreciate any help with code Thanks Ammu (6 Replies)
Discussion started by: ammu
6 Replies

2. Shell Programming and Scripting

shell script: grep multiple lines after pattern match

I have sql file containing lot of queries on different database table. I have to filter specific table queries. Let say i need all queries of test1,test2,test3 along with four lines above it and sql queries can be multi lines or in single line. Input file contains. set INSERT_ID=1; set... (1 Reply)
Discussion started by: mirfan
1 Replies

3. Shell Programming and Scripting

Strings from one file which exactly match to the 1st column of other file and then print lines.

Hi, I have two files. 1st file has 1 column (huge file containing ~19200000 lines) and 2nd file has 2 columns (small file containing ~6000 lines). ################################# huge_file.txt a a ab b ################################## small_file.txt a 1.5 b 2.5 ab ... (4 Replies)
Discussion started by: AshwaniSharma09
4 Replies

4. Shell Programming and Scripting

Delete lines in file containing duplicate strings, keeping longer strings

The question is not as simple as the title... I have a file, it looks like this <string name="string1">RZ-LED</string> <string name="string2">2.0</string> <string name="string2">Version 2.0</string> <string name="string3">BP</string> I would like to check for duplicate entries of... (11 Replies)
Discussion started by: raidzero
11 Replies

5. Shell Programming and Scripting

Script to multi-transfer splitted files via scp

Hey :3 I am moving some stuff between different servers. I do it like this: scp -r -P 22 -i ~/new.ppk /var/www/bigfile.tar.gz user@123.123.123.123:/var/www/bigfile.tar.gz Lets say, this file is 50 GiB. I would like to know, if its possible to split the file in different parts,... (2 Replies)
Discussion started by: Keenora
2 Replies

6. Shell Programming and Scripting

Print only lines where fields concatenated match strings

Hello everyone, Maybe somebody could help me with an awk script. I have this input (field separator is comma ","): 547894982,M|N|J,U|Q|P,98,101,0,1,1 234900027,M|N|J,U|Q|P,98,101,0,1,1 234900023,M|N|J,U|Q|P,98,54,3,1,1 234900028,M|H|J,S|Q|P,98,101,0,1,1 234900030,M|N|J,U|F|P,98,101,0,1,1... (2 Replies)
Discussion started by: Ophiuchus
2 Replies

7. Shell Programming and Scripting

Returning two lines if they both match strings

Hi I have a problem where I have a large amount of files that I need to scan and return a line and its following line, but only when the following line begins with a string. String one - line one must begin with 'Bill' String two - line two must begin with 'Jones'. If these two... (7 Replies)
Discussion started by: majormajormajor
7 Replies

8. Shell Programming and Scripting

Script to match lines in screen

I'd like to ask people who knows bash scripting to write me a script which would open a specific screen and match lines. Here is algorithm I'm thinking about. Find SCREENS named name1, name2.... and nameX. Open them one by one and type 'STATS' Match last lines of the screen before command... (3 Replies)
Discussion started by: GhostMan
3 Replies

9. Shell Programming and Scripting

Delimited records splitted into different lines

Hi I am using delimited sequence file. Delimter we are using is pipe .But for some of the records for one of the column the values are getting split into different lines as shown below "113"|"0155"|"2016-04-27 07:59:04"|"1930"|"TEST@TEST"|"2016-04-27 11:04:04.357000000"|"BO"|"Hard... (13 Replies)
Discussion started by: ginrkf
13 Replies

10. UNIX for Beginners Questions & Answers

Use strings from nth field from one file to match strings in entire line in another file, awk

I cannot seem to get what should be a simple awk one-liner to work correctly and cannot figure out why. I would like to use patterns from a specific field in one file as regex to search for matching strings in the entire line ($0) of another file. I would like to output the lines of File2 which... (1 Reply)
Discussion started by: jvoot
1 Replies
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 out- put. 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: * Old awk always has a line loop, even if there are no line actions, whereas new awk does not. * 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 inte- ger 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 [...]. Itera- tion 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 the array base $[ from 1 back to perl's default of 0, but remember to change all array sub- scripts AND all substr() and index() operations 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]. 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 v5.8.9 2005-03-10 A2P(1)
All times are GMT -4. The time now is 10:03 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy