I'd be surprised if you ever managed to execute
anything you compiled like that ...

Have a read of man gcc, particularly look at the
meaning of -c as a switch.


Cheers,
Tink

thx it is fine now...

Thx a lot for your asnwes.. i have some questions concering the code i have found here

http://www.csfalcon.com/index.jsp?topic=UNIX%20Daemon

I have executed your code some times and as i can see the demon procees depends in the child process as u destroy the parent... Are u absolutely sure that this is the best way for implementing this?

Except from these i just want to know

if the following code is necessary
umask(0);

sid = setsid(); /* obtain new process group */
if (sid < 0){
/* error */
}

chdir("/");
/* close input/output of the daemon process */
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);

Why do u need the umask and do u want to obtain a new process group? And finally why do u close the input/output of the daemon process?
Thx a lot.. have a nice week

dear pls help
iam novice but the following problems require source codes.this is my last help i have tried and no body id helping.pls help as many s possible .


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1.Write a C program for error detecting code: CRC-CCITT and CRC -32.
2.Write a C Program for frame sorting technique used in buffer.
3.Write a C program to implement MLMA Collision free protocol.
4.Write a C program for Transmission flow control protocol- Goback N or Selective repeat.
5.Write a c program to implement security algorithm using wired equivalent privacy.
6.write a c program for private key encryption using DES 64bit key.
7.Write a c program for implementing scheduling techniques using FIFO and Round robin.
8.Write a c program for spanning tree algorithm to find loopless path with 6 to 10 nodes.
9.write a c program for hamming code .
10.Form a HDLC frame using Characer stuffing and bit stuffing .write a c program to find the shortest path in a network of 6 to 10 nodes.
11.write a C program for a)distance vector algorithm to find suitable path for Transmission b) Congestion control using Leaky bucket or Token bucket algorithm.
12.Implement PC to PC Communication
a)using TCP/IP sockets
b)using DES 64-bit key or RSA encrypt data in one node and decrypt in another.
13.Write and Execute c program on linux o.s ,a client and server program to make
a)Client send the name of file.
b)Server to send back contents of requested file if present else send appropriate message.

Using FIFO or Message Queue as the IPC Channed (Processes are running on the same machine)

rajashekarnk,

Hijacking other peoples threads, and asking us to do our homework fo you are both against our rules. If you have a question to ask please start your own thread. If your question pretains to hw don't bother, we aren't in the business of doing your work for you.

John