10 More Discussions You Might Find Interesting
1. Homework & Coursework Questions
Write a program using select, which will create some number of child processes that continuously send text messages to the parent process using pipes. Each child has its own pipe that it uses to communicate with the parent. The parent uses select () to decide what pipes should be processed to... (1 Reply)
Discussion started by: ripssingh
1 Replies
2. Shell Programming and Scripting
Trying to figure out a load issue with a webserver. I have traced a php script and noticed the following
connect(4, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("XX.XX.XX.XX")}, 16) = -1 EINPROGRESS (Operation now in progress) <0.000035>
poll(, 1, 2000) = 1 () <0.000120>... (5 Replies)
Discussion started by: rajan007
5 Replies
3. Programming
hi everyone
i wrote a system call and compiled the kernel succesfully...
my system call is in a file in the kernel folder named my_syscall1.c (kernel/my_syscall1.c)
the header file for this system call i added it in the folder include like this include/my_syscall1/my_syscall1.h
my problem is... (2 Replies)
Discussion started by: demis87
2 Replies
4. Programming
I have a cgi script which is called after certain time interval, which has this:
system ("ls -l /tmp/cgic* | grep -v \"cgicsave.env\" | awk '{print $5}'");
During the execution of this script,the output is 0 sometimes. But due to this the system call is not working at all and doesnt o/p... (2 Replies)
Discussion started by: xs2punit
2 Replies
5. Programming
Below is my code. Every once in a while the select call takes as long as 150 seconds (discovered by printing time before and after this statement) while the timeout specified into it is only 1 second. Any clue why? I can't believe that select call which has been around for centuries can have a bug,... (15 Replies)
Discussion started by: old_as_a_fossil
15 Replies
6. Programming
I have this while loop:
while (notdone) {
//Set the timers
waitd.tv_sec = 5;
waitd.tv_usec = 0;
FD_ZERO(&tempreadfds);
FD_ZERO(&tempwritefds);
FD_ZERO(&readfds); /* initialize the read fd set */
FD_ZERO(&writefds); /* initialize the write fd set */
... (1 Reply)
Discussion started by: Legend986
1 Replies
7. Programming
Hi
I'm studing the system call. I've written a small program that return the time spent in doing some operations. Now I'd like to write one that return the time spent in user mode of a process.
I'm reading that i should use the tms struct:
clock_t times(struct tms *buf);
struct tms {... (2 Replies)
Discussion started by: Dedalus
2 Replies
8. UNIX for Advanced & Expert Users
Hi,
Can any one tell me how to use the fourth argument of select system call.I saw example "port forwarding" on the net,but it was too complex for me to understand.Can any one explain me about the usage of exceptfds argument of select system call with simple example.
Thanks. (2 Replies)
Discussion started by: bvijaya
2 Replies
9. Programming
How the c compiler differentiates the system calls and function calls? (1 Reply)
Discussion started by: rangaswamy
1 Replies
10. UNIX for Advanced & Expert Users
Hi,
Ho do I differentiate system call from library call?
for example if I am using chmod , how do I find out if it is a system call or library call?
Thanks
Muru (2 Replies)
Discussion started by: muru
2 Replies