System + Network Programming, your advice required??? Post: 302581841

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Top Forums Programming System + Network Programming, your advice required??? Post 302581841 by gabam on Wednesday 14th of December 2011 08:18:38 AM

12-14-2011

Registered User

System + Network Programming, your advice required???

Dear friends,
Before putting my questions forward, I would like to put some data infront of you, hope you will help me at the end.
This website
Cray-Cyber - Welcome
provides free access to many supercomputers and mainframe computers. When you login through ssh, they provide you with a screen, welcoming you, and listing all the systems which are online and offline. When you choose an online system, they take you to that particular system, and then the authorization takes place, and after you provide the login details, they redirect you to that particular system with a particular operating system, then another authorization takes place after that you start using that system. The login that they provide is available on all online systems running different operating systems. They have different systems running Operating systems like unicos unix, solaris, vms, etc.
Now my question is that I want to build such a system, for example
In my case, I will be having 5 computers running linux, solaris, windows, dos, z/os. These 5 computers will be behind a 6th computer which will be running linux, running the software which handles all the authorization and redirection jobs, and this system will be available on the internet, allowing users to use all those 5 computers and their operating systems.
This whole setup looks a bit complex I guess, maybe you can guide me. I think it requires system and networking programming in unix using C language, if I am wrong please correct me.
And do you know of an open source project similar to this, which could help me, and books which, after reading it, would enable me to build such a system. I am familiar with C, but apart from a number of small programs, I don't have much experience building systems as complex as this.

Please help me,
I am looking forward to your wonderful replies!

Thanks in advance!

gabam

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LEARN ABOUT OSF1

poll

Poll(4) 						     Kernel Interfaces Manual							   Poll(4)

NAME

       Poll - Contains information specifying when the UNIX-to-UNIX Copy Program (UUCP) should poll designated remote computers

SYNOPSIS

       /usr/lib/uucp/Poll

DESCRIPTION

       The  /usr/lib/uucp/Poll	file  contains information for polling remote computers. Each entry in the Poll file contains the name of a remote
       computer to call, followed by a <TAB> character, and a sequence of hourly intervals expressed in digits. These are the hourly intervals	at
       which the local system polls a remote system; you must specify interval times as digits between 0 and 23. The format of entries in the Poll
       file is: sys-name<TAB>hour

       Note that you must be logged in as root to edit the Poll file, which is owned by the uucp login ID.

       The Poll file is used with the crontabs/uucp file, the uudemon.hour script, and the uudemon.poll script.  Together, these files are respon-
       sible for initiating automatic calls to remote systems to perform certain maintenance tasks.

EXAMPLES

       The  following  example provides polling of computer eagle every 4 hours: eagle	   0 4 8 12 16 20 The follwing example provides polling of
       computer hera every hour: hera 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

FILES

       Contains all the configuration files for UUCP, including the Devices file.  Describes accessible remote systems.  Initiates file  transport
       calls  to  remote  systems.  Polls remote systems listed in /usr/lib/uucp/Poll file.  The uucp file that contains instructions for the cron
       daemon.

RELATED INFORMATION

       Commands: crontab(1)

       Daemons: cron(8) delim off

																	   Poll(4)

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