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Full Discussion: question to build a shell script
Top Forums Shell Programming and Scripting question to build a shell script Post 302150007 by vishalpatel03 on Sunday 9th of December 2007 07:13:07 PM
Old 12-09-2007
question to build a shell script
Hi
All,

I want to develope a script.
can you please give me solution to this script?

Several Processes Reporting Status back to a Master

Write two programs that communicate using message queues. One program (the
master) will receive messages periodically sent by multiple copies of the other
program (senders). The messages sent might simulate status or degree of
completion of a sender. Upon receipt, the master should print the message with
some identification of the sender. Prior to termination, each sender will send
a delimiter message. After receiving delimiter messages from all the senders,
the master will remove the message queue and exit.

eg.

assume the master's filename is msg_rpt_m

$msg_rpt_m
>From 14437: status mesg #1
>From 14438: status mesg #1
>From 14439: status mesg #1
>From 14437: status mesg #2
>From 14438: status mesg #2
>From 14439: status mesg #2
>From 14437: status mesg #3
>From 14438: status mesg #3
>From 14439: status mesg #3
>From 14437: status mesg #4
>From 14438: status mesg #4
>From 14439: status mesg #4
>From 14437: status mesg #5
>From 14438: status mesg #5
>From 14439: DONE
>From 14437: DONE
>From 14438: status mesg #6
>From 14438: DONE
$

Thanks,
Vishal
 

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LEARN ABOUT PHP

mesg

MESG(1)                                                            User Commands                                                           MESG(1)

NAME

       mesg - display (or do not display) messages from other users

SYNOPSIS

       mesg [option] [n|y]

DESCRIPTION

       The mesg utility is invoked by a user to control write access others have to the terminal device associated with standard error output.  If
       write access is allowed, then programs such as talk(1) and write(1) may display messages on the terminal.

       Traditionally, write access is allowed by default.  However, as users become more conscious of various security risks, there is a trend  to
       remove write access by default, at least for the primary login shell.  To make sure your ttys are set the way you want them to be set, mesg
       should be executed in your login scripts.

ARGUMENTS

       n      Disallow messages.

       y      Allow messages to be displayed.

       If no arguments are given, mesg shows the current message status on standard error output.

OPTIONS

       -v, --verbose
              Explain what is being done.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

EXIT STATUS

       The mesg utility exits with one of the following values:

            0     Messages are allowed.

            1     Messages are not allowed.

           >1     An error has occurred.

FILES

       /dev/[pt]ty[pq]?

SEE ALSO

       login(1), talk(1), write(1), wall(1), xterm(1)

HISTORY

       A mesg command appeared in Version 6 AT&T UNIX.

AVAILABILITY

       The mesg command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                                                           July 2014                                                             MESG(1)
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