06-17-2002
Basically, you only have to fork() several childs whose "work" is to be blocked on accept().
As all childs are blocked there, when some connection arrives the kernel will awake one of the child processes, so it will go on after accept(), doing its "work".
Some operating systems dont allow blocking on accept(), so the childs are blocked in a file instead.( which, by the way, its more convenient.)
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
i need the a c program that simulates the "ls" command:b: (5 Replies)
Discussion started by: madhu.it
5 Replies
2. Shell Programming and Scripting
Hi,
I am having an input file which contains a group of words,if one specific word comes which goes to next line.
example:
input file===>
shashi country= india comapny= none shashi shashi company= NONE shashi=my name
output===>
shashi country= india comapny= none
shashi
shashi... (6 Replies)
Discussion started by: hegdeshashi
6 Replies
3. Programming
Hi guys, I'm trying to write a little program that will fill up my harddrive and will log the process during this.
Now I've come up with this:
#include <stdio.h>
void main(void) {
char cmd1;
char cmd2;
int i=1;
sprintf(cmd2, "df -h");
while (i<=5)
{
system("dd... (3 Replies)
Discussion started by: Tiglet
3 Replies
4. UNIX for Dummies Questions & Answers
I have to
Write a program in C that recognizes the following commands and translates them into much simpler ones
Commands to recognize shorter command
list L
cd dir C - dir_length - dir
get file_name G - file_name_length - file_name
Long commands are read from the standard input and... (1 Reply)
Discussion started by: aintour
1 Replies
5. Homework & Coursework Questions
I have to
Write a program in C that recognizes the following commands and translates them into much simpler ones
Commands to recognize shorter command
list
L
cd dir
C - dir_length - dir
get file_name G - file_name_length - file_name
Long commands are read from the standard input... (1 Reply)
Discussion started by: aintour
1 Replies
6. Shell Programming and Scripting
Hello..
I want to take back up from server to local machine and i dont know how to do it using cron and sftp . I can do it by manually typing password in the terminal and taking the back up. How to create a 'backup.sh' file for doing all the back up process and shut down automatically after... (1 Reply)
Discussion started by: deepoos
1 Replies
7. Shell Programming and Scripting
I need help with the following.
1) Write a program in any language that takes a single integer array parameter and returns the decimal average of the input values.
2) Write a program, in any language, that prints the integers from 1 to 10, along with a cumulative sum of the integers printed... (1 Reply)
Discussion started by: sqa4life
1 Replies
8. Shell Programming and Scripting
Hi,
Here is my question:
I want a shell script which I name as 'del', and can be used as del(string).
when run del(string), it will delete several directories at different locations in my system,like:
rm -fr /lustre/fs/scratch/user/$string
rm -fr /home/user/$string
rm -fr... (4 Replies)
Discussion started by: 1988PF
4 Replies
9. UNIX for Dummies Questions & Answers
I am hoping someone can give me a good free web resource for writing code to compile a binary executable. I am getting fairly decent at writing shell script, are the .f files just shell scripts? Also, I don't know where to begin on the makefiles. The reason I am curious is because I have been... (6 Replies)
Discussion started by: butson
6 Replies
FORK(2) System Calls Manual FORK(2)
NAME
fork - spawn new process
SYNOPSIS
fork( )
DESCRIPTION
Fork is the only way new processes are created. The new process's core image is a copy of that of the caller of fork. The only distinc-
tion is the fact that the value returned in the old (parent) process contains the process ID of the new (child) process, while the value
returned in the child is 0. Process ID's range from 1 to 30,000. This process ID is used by wait(2).
Files open before the fork are shared, and have a common read-write pointer. In particular, this is the way that standard input and output
files are passed and also how pipes are set up.
SEE ALSO
wait(2), exec(2)
DIAGNOSTICS
Returns -1 and fails to create a process if: there is inadequate swap space, the user is not super-user and has too many processes, or the
system's process table is full. Only the super-user can take the last process-table slot.
ASSEMBLER
(fork = 2.)
sys fork
(new process return)
(old process return, new process ID in r0)
The return locations in the old and new process differ by one word. The C-bit is set in the old process if a new process could not be cre-
ated.
FORK(2)