script to tail file; problem with awk and special characters
Trying to use code that I found to send only new lines out of a log file by doing:
Code:
while :; do
temp=$(tail -1 logfile.out)
awk "/$last/{p=1}p" logfile.out #pipe this to log analyzer program
last="$temp"
sleep 10
done
Script works fine when logfile is basic text, but when it contains characters that have brackets and slashes, the awk command has issues:
Code:
awk: fatal: Invalid range end: /[15C8:01E6-0258] 01/
Here is sample data in log:
Code:
[15C8:01EB-1DF8] 01/24/2012 08:03:43 AM Open session
[15C8:01EB-0310] 01/24/2012 08:03:43 AM Closed session
[11A8:000F-06F4] 01/24/2012 08:03:44 AM Router: Message 0047BCE8 delivered to
[15C8:01EB-1660] 01/24/2012 08:03:44 AM Opened session
[15C8:01E6-0258] 01/24/2012 08:03:44 AM Closed session for
I have tried different ways of putting quotes around the last variable, but does not work or breaks script in different way. Any awk experts have suggestions?
i have this script that searches for a pattern.
However it fails if the pattern includes some
special characters. So far, it fails with the
following strings:
1. -Cr
2. $Mj
3. H'412
would a sed or awk be more effective?
i don't want the users to put the (\)
during the search (they... (5 Replies)
Hi all,
How do I extract a value without special characters? I need to extract the value of %Used from below and if its greater than 80, need to send a notification.
I am doing this right now..Its giving 17%..Is there a way to extract the value and assign it to a variable in one step?
df |grep... (3 Replies)
Hi all,
We are facing the following problem in our HP-UX machine: software that manipulates utf-8 encoded strings (e.g. during string cut), fails to correctly manipulate strings (all containing Greek characters) that contain special characters like @, &, # etc. Actually, in different... (3 Replies)
Hi All,
I have a CSV file in which some fields contains special character for ex:-
my file is file 1
cat file1
abcd,bgfht,ngbht,abvc ****
hdlld,hsgdt,bhfy,knht ****
whenever i am trying to put a 4th feild in a variable its giving me list of all the files i have in current... (6 Replies)
I'm using awk '{print $1}' and it works most of the time to print the contents of a mysql query loop, but occationally I get a field with some special character in it, is there a way to tell awk to ignore all special characters between my FS? I have >186K records, so building a list of ALL special... (6 Replies)
Hi Experts.
I'm stuck with the below AWK code where i'm trying to move the records containing any special characters in the last field to a bad file.
awk -F, '{if ($NF ~ /^|^/) print >"goodfile";else print >"badfile"}' filename
sample data
1,abc,def,1234,A *
2,bed,dec,342,* A ... (6 Replies)
grep -i "$line,$opline" COMBO_JUNK|awk -F, '
{
C4+=$4
}
{
}
END {
print C4
}
' OFS=,`
when i run this command in the script.... it o/p all the value as 0 if $line contains any special parameters.....
but the same script if i run in command prompt... it shows... (4 Replies)
This is really frustrating because I can't figure it out.
I'm running a health check script. One of the items I'm checking is the amount of memory on a server. I use the free command, which outputs something like this (excerpt)
Mem: 100 100 100 100
Swap: 100 100 100 100
In my debugging... (5 Replies)
Hello Folks,
Need to bisect strings based on a subset.
Below works good.
echo /a/b/c/d | awk -F"/c/d$" '{print $1}'
/a/b
However, it goes awry with special characters.
echo /a/b/c+/d | awk -F"/c+/d$" '{print $1}'
/a/b/c+/d
Desired output:
/a/b
Escaping the special characters... (11 Replies)
Discussion started by: vibhor_agarwali
11 Replies
LEARN ABOUT DEBIAN
igawk
IGAWK(1) Utility Commands IGAWK(1)NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)
01-24-2012
