I have a Linux Machine in my apartment with x11 fowarding. It is
connected to the internet via dialup modem. I access X on Linux
Machine from my Laptop at work via SSH. Now when invoke xclock over
ssh, I have to type

clock &

in order to get the graphical clock to appear on my laptop.

How I have to type & after xclock? I thought that once xlock was
placed in the background, the shell would stop the xclock job when it
tried to read from the standard input. However it doesn't.

Hi,

I want to implement a communication through sockets.

This should work as follows:

I first create a socket with "socket( AF_INET, SOCK_STREAM, 0 );"
bind it to a particular address::port and listen to all clients.

Then I run an external application with "system". This application
uses the same port as previously defined by the socket and sends some
data. This application stays alive.

Finally, I would like to read the data that I received from the
socket from the external application. However, the problem I have
is that my program does not get to the point where I can evaluate
the received data since it gets stuck in the invoked external
application which stays alive. So, I look for an approach to
run the external application as a separate process that will
be started, remains in memory (this is automatically done) and
return control to the caller (where I've defined the socket).

Any ideas what I should use instead of "system" to run the external
application in a sort of a parallel thread?

Hi Everybody,

I want to implement a file cache on Linux. I want to know what my
options are and what are the different ways in which I can implement
the file cache:

For instance, if I have a set of 4 processes and I want to intercept
the open(), read(), write() and close() system calls made by these 4
different PIDs and redirect those calls through my caching mechanism.

1. Could I do it in a user level library, for instance, if I write a
library interposer to intercept the system calls and then allocate a
chunk of memory. Will that be able to serve as my cache?
2. Could...

I have a process running , and it is crashing at some point..I have
attached the gdb to the PID of the application, and then did a
continue,because my application does not proceed further without doing
continue. But, when it crashes, it recved SIGSEGV, but it immediately
continued ,and I couldn't have the time to do "bt" on it.

So, is there any way to go to the crash point ? Can I put some
breakpoint in system functions (which i am not aware) which will hit
when the application crashes and I can get the point of crashing ?

thanks.

Hi,

Not sure if this is the right place to ask but anyway...

I need to learn to use libpcap... I downloaded the source and
installed it as per instructions (which created a libpcap.a). But I
still don't have the header files (such as pcap.h) and have no clue
where to find them. Can anyone help?

Thanks

Is there a command in gdb that you can issue interactively to save the
output of gdb to a file? Something like a typescript command.

Using the script command, then firing up gdb is not possible in the
environment I am in.

thanks.

Interested in Building Online Business Empire Without Investing
Single Dollar!!

Explore The Best Online Income Opportunity On The Internet Today -
Absolutely FREE!

EARN UNLIMETED WITHOUT INVESTMENT WITH On The Net..

"on top of the primary purchase and MAKE MORE MONEY WITHOUT DOING ANY
ADDITIONAL WORK!"

For More Details; http://moneybusinessideas.blogspot.com/

is there any tool that displays the function call trace dynamically
and writes to a file or something like that. If it is any simple
library that links to my app. will be good.

thanks
sinbad

Hi Everybody,

I want to intercept the open(), read(), write() and close() system
calls on Linux. This can be done in 2 ways:

1. I write a Linux Kernel Module which intercepts these calls.
Eg. http://85.147.245.113/mirrorbooks/networksecuritytools/0596007949/networkst-CHP-7...
2. I can also write a library and then link this library to the
applications whose system calls I would like to intercept.
Eg. http://developers.sun.com/solaris/articles/lib_interposers.html

My question is how do I write this library on Linux (steps to write
and compile this library), since the only link which I found above is
for Solaris.

Could somebody please help me?

I would really appreciate your help.

Thanks and Regards,
Christina.

On Feb 28, 3:49 am, "jason.cipri...@gmail.com"
gmail.com> wrote: