Is there some way I can have a script monitor the newest line of a log file until a certain entry gets placed in the log?
Basically I want to start this script, and have it spit up the last 10 lines or so to a browser via AJAX... the AJAX is not my problem though, as I have no idea how to go about perpetually getting the last line of a log... without being a resource hog that is.
I figure it looks something like this:
Code:
start_log-checker();
start_log-generating-app();
start_log-checker() {
while($log_line ne "Done!") {
if ($@array < 10) {
unshift(@array, $log_line);
} else {
pop(@array);
unshift(@array, $log_line);
}
upstream_to_browser(@array);
}
if ($log_line eq "Done!") upstream_to_browser(@array);
}
Hi Everyone ,
I am facing a strange problem
i have made the follwing script to watch a appending log file (abc.log) but its not moving after the line tail -f ,
any suggestions
=====================================
#!/bin/bash
while true
do
tail -f abc.log | grep "exceptions"
echo hi... (12 Replies)
Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
Hi Everyone,
if my folder "foldera" inside has one file.
so if i do
if ($df =~ /^\./) { next; }
then i will get
###
filea
###
if i want to have
###
..
filea
###
means also display the parent .., how should i modify the perl ~// in my code?
Thanks
---------- Post updated... (6 Replies)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hi all,
I was wondering why tail -n 2 filename produce an error when I manage to do similar command on head -n 2 filename
SunOS{type8code0}: tail -n 2 filename
usage: tail ]
tail ] (2 Replies)
Hi all,
Can anyone guess why this is happening? I am new to Perl, so please help me to fix this error:
- I have a static html file which calls the cgi-perl script.
HTML Code:
<html>
<head>
<title> Hey Dude! </title>
</head>
<body>
<form method="POST"... (3 Replies)
How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address
and column 3 contains “cc” e-mail address to include with same email.
Sample input file, email.txt
Below is an sample code where... (2 Replies)
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
Hi 2 all,
i have had AIX 7.2
:/# /usr/IBMAHS/bin/apachectl -v
Server version: Apache/2.4.12 (Unix)
Server built: May 25 2015 04:58:27
:/#:/# /usr/IBMAHS/bin/apachectl -M
Loaded Modules:
core_module (static)
so_module (static)
http_module (static)
mpm_worker_module (static)
... (3 Replies)
Discussion started by: penchev
3 Replies
LEARN ABOUT DEBIAN
control.ctl
CONTROL.CTL(5) File Formats Manual CONTROL.CTL(5)NAME
control.ctl - specify handling of Usenet control messages
DESCRIPTION
The file /etc/news/control.ctl is used to determine what action is taken when a control message is received. It is read by the parsecon-
trol script, which is called by all the control scripts. (For an explanation of how the control scripts are invoked, see innd(8).)
The file consists of a series of lines; blank lines and lines beginning with a number sign (``#'') are ignored. All other lines consist of
four fields separated by a colon:
message:from:newsgroups:action
The first field is the name of the message for which this line is valid. It should be either the name of the control message, or the word
``all'' to mean that it is valid for all messages.
The second field is a shell-style pattern that matches the email address of the person posting the message. (The poster's address is first
converted to lowercase.) The matching is done using the shell's case statement; see sh (1) for details.
If the control message is ``newgroup'' or ``rmgroup'' then the third field specifies the shell-style pattern that must match the group
being created or removed. If the control message is of a different type, then this field is ignored.
The fourth field specifies what action to take if this line is selected for the message. The following actions are understood:
doit The action requested by the control message should be performed. In most cases the control script will also send mail to usenet.
doifarg
If the control message has an argument, this is treated as a ``doit'' action. If no argument was given, it is treated as a ``mail''
entry. This is used in ``sendsys'' entries script so that a site can request its own newsfeeds(5) entry by posting a ``sendsys
mysite'' article. On the other hand, sendsys ``bombs'' ask that the entire newsfeeds file be sent to a forged reply-to address; by
using ``doifarg'' such messages will not be processed automatically.
doit=file
The action is performed, but a log entry is written to the specified log file, file. If file is the word ``mail'' then the record
is mailed. A null string is equivalent to /dev/null. A pathname that starts with a slash is taken as the absolute filename to use
as the log. All other pathnames are written to /var/log/news/file.log. The log is written by writelog (see newslog(8)).
drop No action is taken; the message is ignored.
log A one-line log notice is sent to standard error. Innd normally directs this to the file /var/log/news/errlog.
log=file
A log entry is written to the specified log file, file, which is interpreted as described above.
mail A mail message is sent to the news administrator.
Lines are matched in order; the last match found in the file is the one that is used. For example, with the following three lines:
newgroup:*:*:drop
newgroup:tale@*.uu.net:comp.*|misc.*|news.*|rec.*|sci.*|soc.*|talk.*:doit
newgroup:kre@munnari.oz.au:aus.*:mail
A newgroup coming from ``tale'' at a UUNET machine will be honored if it is in the mainstream Usenet hierarchy. If ``kre'' posts a new-
group message creating ``aus.foo'', then mail will be sent. All other newgroup messages are ignored.
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.8, dated 1996/09/06.
SEE ALSO innd(8), newsfeeds(5), scanlogs(8).
CONTROL.CTL(5)