Basic question about sockets


 
Thread Tools Search this Thread
Special Forums IP Networking Basic question about sockets
# 1  
Old 11-29-2012
We wish the program to be single-connection. The app is a controller for a modem, and multiple users with concurrent access to the modem settings is unacceptable.

Once a particular user has terminated his session, it's fine for someone else to start one.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Programming

Sockets select() question

Hello everyone. I have a question regarding select() function. Imagine i had passed a fd_set* as the readfds parameter. Can i add some fd to the fd_set, using FD_SET, while the thread is blocked in the select call(obviously from another thread), and will that select call monitor those fd, even if... (2 Replies)
Discussion started by: adadon
2 Replies

2. Shell Programming and Scripting

basic nc question

i'm doing this in one terminal: nc -lu 7402 and it appears to start listening properly, then in another i do this: echo "hello" | nc -u localhost 7402 and nothing happens on the listening terminal - what am i doing wrong? thanks. (7 Replies)
Discussion started by: peterworth
7 Replies

3. Shell Programming and Scripting

basic question

hi, I have a basic question,, i am in a directory called /intas/OCU_3.9.1/sbin ocuut1@france>mv itsa_tcs itsa_tcs_old mv: itsa_tcs_old: rename: Permission denied i am logging as the owner of the file. when i am doing this i am getting the above error of permission denied. I know... (3 Replies)
Discussion started by: namishtiwari
3 Replies

4. HP-UX

Basic OS question

Could someone tell me the command to find out the OS version which will give 12 character not the 9 characters(which is usually machine id). uname -i gives machine id and uname -a is more comprehensive way to look. Thanks! (4 Replies)
Discussion started by: catwomen
4 Replies

5. UNIX for Dummies Questions & Answers

Really basic question....

Hello all. Let me start off by saying I know a little more then it seems by me asking this question... here goes I have an old 486 box and I want to start messing around with unix. I've been taking classes for 3 or 4 years in c programming in unix, so I am used to the commands and such, but I... (1 Reply)
Discussion started by: robherms
1 Replies

6. UNIX for Dummies Questions & Answers

Very Basic Question

How to know if my AIX 5.2 is running at 64bits? THANKS (5 Replies)
Discussion started by: GermanSkull
5 Replies

7. Programming

sockets question again

I apologize if this seems like a repeat post, but I never got a clear answer (this isn't a criticism, it's possible I'm not being clear enough)....I'm attempting to enlarge the socket buffers for a udg socket, but it seems that no matter how large I attempt to set the buffer with setsockopt( ) ... (3 Replies)
Discussion started by: jalburger
3 Replies

8. Programming

sockets question

I'm new to sockets programming and I have a few questions: Is the a maximum limit that you can use for the send and receive buffers via a call to setsockopt()? Does it differ on different OSs? If it does, how do I find out the max limit? What is the advantage to setting the buffers to be... (1 Reply)
Discussion started by: jalburger
1 Replies

9. UNIX for Dummies Questions & Answers

basic question

hey...when i type who...what does "pts" field mean??? eg pts 0 etc (1 Reply)
Discussion started by: urwannabefriend
1 Replies

10. UNIX for Dummies Questions & Answers

basic question

I have some basic doubts. Can someone clarify in this forum? 1)if then eval ' tset -s -Q -m ':?hp' ' else eval ' tset -s -Q ' what does it exactly mean in .profile? 2) what are 'nobody' and 'noaccess' usernames in /etc/passwd file. ... (3 Replies)
Discussion started by: asutoshch
3 Replies
Login or Register to Ask a Question
XRLOGIN(1)						      General Commands Manual							XRLOGIN(1)

NAME
xrlogin - start an xterm that uses ssh (or optionally rlogin or telnet) to connect to a remote host SYNOPSIS
xrlogin [-l username] [-rlogin|-telnet] [xterm options] remote-host DESCRIPTION
Xrlogin opens an xterm window and runs ssh, rlogin or telnet to login to a remote host. Xrlogin automatically passes the -name argument to xterm with a value of "xterm-hostname" where hostname is the name of the remote host. This allows the user to specify resources in their server's resource manager which are specific to xterms from a given host. For example, this feature can be used to make all xterm windows to a given remote host be the same color or use a specific font or start up in a spe- cific place on the screen. Xrsh(1) passes the same string so they are compatible in this regard. Xrlogin specifies that the default title for the new xterm will be "hostname" where hostname is the name of the remote host. This and the -name argument above can be overridden with xterm-options on the command line. One could also use xrlogin's sister command xrsh(1) to open a window to a remote host. In the case of xrsh, the xterm would run on the remote host and use X as the connection protocol while xrlogin would run the xterm on the local host and use rlogin or telnet as the con- nection protocol. See xrsh(1) for a discussion of the merits of each scheme. OPTIONS
-l username When not using -telnet, use username as the id to login to the remote host. -rlogin Use the rlogin protocol to open the connection. In general rlogin is preferred because it can be configured to not prompt the user for a password. Rlogin also automatically propagates window size change signals (SIGWINCH) to the remote host so that applications running there will learn of a new window size. -telnet Use the -telnet protocol to open the connection. Use of telnet provided mostly for hosts that don't support rlogin. COMMON PROBLEMS
Make sure that the local host is specified in the .rhosts file on the remote host or in the remote hosts /etc/hosts.equiv file. See rlogin(1) for more information. EXAMPLES
xrlogin -bg red yoda Start a local red xterm which connects to the remote host yoda using rlogin. xrlogin -telnet c70 Open a local xterm which connects to the remote host c70 using telnet. SEE ALSO
xrsh(1), rlogin(1), telnet(1) AUTHOR
James J. Dempsey <jjd@jjd.com> and Stephen Gildea <gildea@intouchsys.com>. X Version 11 Release 6 XRLOGIN(1)