I want to search a file for a string and then if the string is found I need the line that the string is on - but also the previous two lines from the file (that the pattern will not be found in)
This is on solaris
Can you help? (2 Replies)
Hello i'm writting a krn shell that will find the letter F and I would like to grab everything from F till 0:00. Is there a sed or awk command that i could use.
Thank you. File is looks like this.
11/12 xxx xxxx xxx F xxxx xxxx
some info entered here
some info entered here
xxxx... (1 Reply)
Hi All, I really need your help. I am a begginner in shell script and I believe this is a very simple issue.
I have in my directory, n-files, like 1.dhm, 2.dhm, 3.dhm.
These files have 1 column with 1 value per line, like:
1.dhm
------
10
20
30
40
50
2.dhm
------
30
50
20 (3 Replies)
#!/bin/sh
who
echo "\r"
echo Enter the terminal ID of the user in use:
echo "\r"
read TERM_ID
echo "\r"
ps -t $TERM_ID | grep sh
echo "\r"
echo Enter the process number to end:
echo "\r"
read PID
echo "\r"
kill -9 $PID
What this code does is ultimately grab the PID of a users sh... (6 Replies)
Hi, I need some help with a script I'm trying to write. I have a log file containing references to a number of different webservices. I wish to write a script that will list the webservices with a count as to how many times they appear in the log.
An example of the log file content:
... (2 Replies)
Hi guys!
I'm new to scripting and I need to write a script in awk.
Here is example of file on which I'm working
ATOM 4688 HG1 PRO A 322 18.080 59.680 137.020 1.00 0.00
ATOM 4689 HG2 PRO A 322 18.850 61.220 137.010 1.00 0.00
ATOM 4690 CD ... (18 Replies)
How do I capture an error for any command I use.
For e.g if i try to zip a file and the file is not there. The regualr $? -gt 0 only tells its un-successful but won't tell me that the file is not there when I run through a script. How can I capture this error?
for e.g.. zip $x.zip $x... (1 Reply)
awk 'NR>=5034&&/Max/{++c}c==3{o=$0 RS $0 RS $0; print o; c=0}' logfile
i would like to modify the above awk command to instead show lines that are the most frequent:
for instance, given a log file containing:
Warning MaxClient is having issues - please
MaxClients java error...yams... (4 Replies)
Hi all,
I want to set up a script to email a person to confirm another program is running but i wish to avoid having to customise the script for each individiual.
I am ok with what i need to do except i need to get the first and last name of the user to construct an email address to send to.... (6 Replies)
Sorry for the weird title but i have the following problem.
We have several files which have between 10000 and about 500000 lines in them. From these files we want to remove lines which contain a pattern which is located in another file (around 20000 lines, all EAN codes). We also want to get... (28 Replies)
Discussion started by: SDohmen
28 Replies
LEARN ABOUT DEBIAN
io::async::pid
IO::Async::PID(3pm) User Contributed Perl Documentation IO::Async::PID(3pm)NAME
"IO::Async::PID" - event callback on exit of a child process
SYNOPSIS
use IO::Async::PID;
use POSIX qw( WEXITSTATUS );
use IO::Async::Loop;
my $loop = IO::Async::Loop->new;
my $kid = $loop->fork(
code => sub {
print "Child sleeping..
";
sleep 10;
print "Child exiting
";
return 20;
},
);
print "Child process $kid started
";
my $pid = IO::Async::PID->new(
pid => $kid,
on_exit => sub {
my ( $self, $exitcode ) = @_;
printf "Child process %d exited with status %d
",
$self->pid, WEXITSTATUS($exitcode);
},
);
$loop->add( $pid );
$loop->run;
DESCRIPTION
This subclass of IO::Async::Notifier invokes its callback when a process exits.
For most use cases, a IO::Async::Process object provides more control of setting up the process, connecting filehandles to it, sending data
to and receiving data from it.
EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_exit $exitcode
Invoked when the watched process exits.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
pid => INT
The process ID to watch. Must be given before the object has been added to the containing "IO::Async::Loop" object.
on_exit => CODE
CODE reference for the "on_exit" event.
Once the "on_exit" continuation has been invoked, the "IO::Async::PID" object is removed from the containing "IO::Async::Loop" object.
METHODS
$process_id = $pid->pid
Returns the underlying process ID
$pid->kill( $signal )
Sends a signal to the process
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::PID(3pm)