Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Count lines and words of a stream output with tail
Top Forums Shell Programming and Scripting Count lines and words of a stream output with tail Post 302864539 by Kibou on Wednesday 16th of October 2013 04:57:25 PM
Old 10-16-2013
Thanks so much. I have learned a lot.

Here is the final version of the script. It works like a charm!

Code:
tempfile=$(mktemp -t XXXXXXXX.$$) || exit 1


(tail -f file | grep --line-buffered "message.*@\|@.*message" | awk 'BEGIN {FS="@"} {print $1;fflush()}' | tee "${tempfile}") &
pid=$!

while true
do
    sleep 0.5

    found=`wc -l "${tempfile}"|awk '{print $1}'`

    [ $found -ge 3 ] && break

done

rm "${tempfile}"
kill $pid

I loved all those details, like the file made with mktemp. Excellent.

I just had to find out one more thing: how to output tail -f and awk. It works with the fflush() function.

Amazing. Thanks so much.

---------- Post updated at 10:57 PM ---------- Previous update was at 10:44 PM ----------

I was so happy that I forgot one more thing. But this is an easy one: counting words.

Code:
tempfile=$(mktemp -t XXXXXXXX.$$) || exit 1

words=/path/words.txt


(tail -f file | grep --line-buffered "message.*@\|@.*message" | awk 'BEGIN {FS="@"} {print $1;fflush()}' | tee "${tempfile}") &
pid=$!

while true
do
    sleep 0.5

    found=`wc -l "${tempfile}"|awk '{print $1}'`

    wc -w "${tempfile}"|awk '{print $1}' > "${words}"


    [ $found -ge 3 ] && break

done

rm "${tempfile}"
kill $pid

Regards.
These 2 Users Gave Thanks to Kibou For This Post:
CarloM ctsgnb
 

10 More Discussions You Might Find Interesting

1. Programming

stream output??

Hi all, I've a structure let's say typdef struct a { int a; int b; char* string} b; I need to make the function smth like readdir(), returning everytime it's called pointer to the next structure. Let's say functions would read the next file in the directory and all the permitions put it in... (2 Replies)
Discussion started by: solvman
2 Replies

2. UNIX for Dummies Questions & Answers

how can I use the stream output in other program

Hello I wander if im doing : ls -l and its giving me lets say 3 results : -rw-r--r-- 1 blah other 1789 May 19 2003 foo.c -rw-r--r-- 1 blah other 1014 May 19 2003 foo.h -rw-r--r-- 1 blah other 270 May 19 2003 foo1.c now I would like to use the first... (1 Reply)
Discussion started by: umen
1 Replies

3. Shell Programming and Scripting

awk help needed in trying to count lines,words and characters

Hello, i am trying to write a script file in awk which yields me the number of lines,characters and words, i checked it many many times but i am not able to find any mistake in it. Please tell me where i went wrong. BEGIN{ print "Filename Lines Words Chars\n" } { filename=filename + 1... (2 Replies)
Discussion started by: salman4u
2 Replies

4. Shell Programming and Scripting

Count the no of lines between two words

Please help in the following problem: Input is: Pritam 123 456 Patil myname youname Pritam myproject thisproject iclic Patil remaining text some more text I need the command which will display the no of lines between two words in the whole file. e.g. Display all the no of lines... (5 Replies)
Discussion started by: zsudarshan
5 Replies

5. Shell Programming and Scripting

Shell script to find out words, replace them and count words

hello, i 'd like your help about a bash script which: 1. finds inside the html file (it is attached with my post) the code number of the Latest Stable Kernel, 2.finds the link which leads to the download location of the Latest Stable Kernel version, (the right link should lead to the file... (3 Replies)
Discussion started by: alex83
3 Replies

6. Shell Programming and Scripting

Scripting help to identify words count in lines

Hi everybody, i have this biological situation to fix: > Id.1 ACGTACANNNNNNNNNNNACGTGCNNNNNNNACTGTGGT >Id.2 ACGGGT >Id.3 ACGTNNNNNNNNNNNNACTGGGGG >Id.4 ACGTGCGNNNNNNNNGGTCANNNNNNNNCGTGCAAANNNNN ........ .... These are nucleotidic sequences with some "NNNN..." always of the same... (4 Replies)
Discussion started by: Giorgio C
4 Replies

7. Shell Programming and Scripting

Deleting lines from a stream after matching a pattern

Hi, I have a requirement to to an ldapsearch and remove the shadow attributes in the output file. What I do is ldapsearch() | operation to remove shadow > FILE The ldapsearch gives output like this(with same line formation): objectClass: FSConfig objectClass: extensibleObject fsCAIP:... (10 Replies)
Discussion started by: lorzinian
10 Replies

8. UNIX for Dummies Questions & Answers

Count the lines with the same values in a column and write the output to a file

Hey everyone! I have a tab delimited data set which I want to create an output contained the calculation of number of those lines with a certain value in 2nd and 3rd column. my input file is like this: ID1 1 10M AAATTTCCGG ID2 5 4M ACGT ID3 5 8M ACCTTGGA ID4 5 ... (7 Replies)
Discussion started by: @man
7 Replies

9. Shell Programming and Scripting

How count the number of two words associated with the two words occurring in the file?

Hi , I need to count the number of errors associated with the two words occurring in the file. It's about counting the occurrences of the word "error" for where is the word "index.js". As such the command should look like. Please kindly help. I was trying: grep "error" log.txt | wc -l (1 Reply)
Discussion started by: jmarx
1 Replies

10. Shell Programming and Scripting

Count words/lines between two tags using awk

Is there an efficient awk that can count the number of lines that occur in between two tags. For instance, consider the following text: <s> Hi PP - my VBD - name DT - is NN - . SENT . </s> <s> Her PP - name VBD - is DT - the NN - same WRT - . SENT - </s> I am interested to know... (4 Replies)
Discussion started by: owwow14
4 Replies

LEARN ABOUT CENTOS

ccs_config_validate

CCS_CONFIG_VALIDATE(8)					      System Manager's Manual					    CCS_CONFIG_VALIDATE(8)

NAME

       ccs_config_validate

DESCRIPTION

       Usage:

       ccs_config_validate [options]

OPTIONS

       -h     Print this help, then exit

       -V     Print program version information, then exit

       -v     Produce verbose output

   Validating XML configuraton files:
       -f configfile
	      Validate an alternate config file without preloading it with default values.

       -l configfile
	      Validate an alternate config file with preloading of default values (recommended option).

   Advanced options:
       -r     Force validation of runtime config

       -C config_loader Override config plugin loader

       -t tempfile
	      Force temporay file to tempfile

       -n     Do not remove temporary file

       -o     Overwrite temporary file (dangerous)

DEFAULT

       Default operation for ccs_config_validate is to load the currently configured environment and verify the outcoming configuration.

       Example 1: current environment uses a configuration file (/etc/cluster/cluster.conf).
	      The  user  modifies  cluser.conf and executes ccs_config_validate without options.  The tool will validate the modified cluster.conf
	      after including default values.

       Example 2: current environment is set to load the configuration from LDAP. Users
	      modifies LDAP databse and before pushing the change to the nodes, she/he can issue ccs_config_validate to verify the contents o  the
	      LDAP database automatically (as long as the correct LDAP environment is set in the cman/cluster sysconfig/defaults files).

								  September 2009					    CCS_CONFIG_VALIDATE(8)
All times are GMT -4. The time now is 03:07 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy