This is very limited and it works in this contrived case because the match is exactly the literal alternation of the regex. However, the purpose of regex is to represent patterns and they are not the exact literal. In order to give it a change each regex must be tracked on its own and each line must be check times the amount of regex.
---------- Post updated at 02:23 PM ---------- Previous update was at 12:14 PM ----------
In case that a visual aid is necessary. example.file
You want three instance for each match. With the previously presented suggestion:
Instead, this could be a more realistic three matches of a pattern.
If you want to print lines from a file that match any of the EREs stored one per line in a file named ERES, but stop using an ERE after it has matched 3 (or whatever value you assign to the maxp variable) lines, you could try:
If the file ERES contains:
and file.txt contains the sample data you provided in post #4, the above code produces the output:
Note that if an input line is matched by more than one of your EREs, that line will only be printed once but each matching ERE's match count will be incremented. And, the output will be in the order of the input text file; i.e., output will not be grouped by matching ERE as in your sample output in post #4. Note also that this code will stop reading file.txt as soon as all given EREs have been matched maxp times; with large input files the could save a lot of I/O.
Note that you can still use alternation in your EREs, but the limit on the number of times an ERE will be matched still applies. If the ERES file just contains your original ERE:
the output produced would just be:
This User Gave Thanks to Don Cragun For This Post:
Here is a version of that awk script wrapped in a Korn shell script that adds command line options to specify the number of matches for each ERE, a simplified case insensitive ERE option, an option to name an alternative pathname to the file containing your EREs, and an option to print some debugging information while the awk script is running:
Although written and tested using a Korn shell, it should work with any POSIX conforming shell. The limitations on the case insensitive ERE processing are detailed in the comments in the awk script.
Does this help?
This User Gave Thanks to Don Cragun For This Post:
hi all,
trying this using shell/bash with sed/awk/grep
I have two files, one containing one column, the other containing multiple columns (comma delimited).
file1.txt
abc12345
def12345
ghi54321
...
file2.txt
abc1,text1,texta
abc,text2,textb
def123,text3,textc
gh,text4,textd... (6 Replies)
In the awk below I am trying to output those lines that Match between file1 and file2, those Missing in file1, and those missing in file2. Using each $1,$2,$4,$5 value as a key to match on, that is if those 4 fields are found in both files the match, but if those 4 fields are not found then missing... (0 Replies)
Hi,
I could only find examples to print line before/after a match, but I'd need to print line after two separate lines matching.
E.g.: From the below log entry, I would need to print out the 1234. This is from a huge log file, that has a lot of entries with "CLIENT" and "No" entries (+ other... (3 Replies)
Hi,
I have a simple problem but i guess stupid enough to figure it out. i have thousands rows of data. and i need to find match patterns of two columns and print the number of rows. for example:
inputfile
abd abp 123
abc abc 325
ndc ndc 451
mjk lkj... (3 Replies)
Hi,
i have been trying to extract multiple lines based on two different patterns as below:-
file1
@jkm|kdo|aas012|192.2.3.1 blablbalablablkabblablabla
sjfdsakfjladfjefhaghfagfkafagkjsghfalhfk
fhajkhfadjkhfalhflaffajkgfajkghfajkhgfkf
jahfjkhflkhalfdhfwearhahfl
@jkm|sdf|wud08q|168.2.1.3... (8 Replies)
I want to search a bunch of files and list only those containing a minimum number of pattern matches. So if I want to identify files containing 3 (or more) instances of the pattern "said:" and I have file1 that contains the lines:
He said:
She said:
and file2 that contains the lines:
He... (3 Replies)
Hi,
I have a large, multiline log file.
I have used pcregrep to extract all entries in that log that match a particular pattern - where that pattern spans multiple lines.
However, because the log file is large, and these entries occur every few minutes, I still output a very large amount... (6 Replies)
Dear all,
I need to search multiple patterns and then I need to print their respective next lines. For an example, in the below table, I will look for 3 different patterns :
1) # ATC_Codes:
2) # Generic_Name:
3) # Drug_Target_1_Gene_Name:
#BEGIN_DRUGCARD DB00001
# AHFS_Codes:... (3 Replies)
Hi there,
I need help about using sed. Iam using sed to delete and print lines that match the port number as listed in sedfile. I am using -d and -p command for delete match port and print them respectively. However, the output is not synchonize where the total deleted lines is not similar with... (3 Replies)