Hi,
I am new to shell programming, and hve been given a request to write a shell script.
Is there any good places to go to see examples of how to write shell programming scripts?
Thanks (4 Replies)
For what purposes should we use shell
/what are the tasks we can achieve using shell
which is best book to learn shell programming
and will nayone tell me diff between shell programming aand shell scripting?
Thank u in advance. (1 Reply)
Provides a menu structure that allows a user to select several options - input a name and address,
lookup a name and address, delete a name and address, and print a formatted report from a text
database (note: this requirement assumes that you will use the program to create a database, though in... (1 Reply)
How can i get sendmail to immediately bounce mail when the server on the other side gives a "550 unknown user" SMTP error? Currently, the outbound mail stays in the queue and is retried until our server gives up, some days later. (0 Replies)
Hi iam new to shell programming. I would like to ask one dought abt the file
handling in unix.
Iam having a file1 as follows:
ASDERFCX1234567890123456
POIUYTRE0098765432123456
BVCXCVBN0955644411111111
File2
ASDERFCX1234567890123456 kill@abc.com ... (8 Replies)
My purpose was to print out all of name of students in a list.First of all,I created a file name "List" in /home/tuan/Desktop/Shell_programming as below
Tom
Henry
Ben
Linda
Marry
And my script "script" is
#!/bin/sh
path=/home/tuan/Desktop/Shell_programming/List
for student in $path... (3 Replies)
Hi i need a favour
i have a file which has some trillions of records. The file is like this
11111000000000192831840914000000000000000000000000000
45789899090000000000000000011111111111111111111111111
I want to cut specific postions in each line like cut1-3 and assisgn it to a variable and... (0 Replies)
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)