Is there a way (in Linux) of getting updates on the lockedness status of a file without polling? I know that the status can be polled via a lockf(fd, F_TEST) or speculative LOCK_NB|LOCK_SH, but po...

I make a reseach on the net and even on the stackoverflow inorder to find an example of using fcntl() to lock and unlock pid file "/var/run/myapp.pid" but I did not find a clear example for that. ...

I am trying to understand what this line of code means: flags = fcntl(-1,F_GETFL,0);

How Should I Request a Non-Blocking Lock? Why doesn't Ruby's File#flock work as expected when separate attempts are made to lock a file? Locking the file in a block is not the correct solution for...

Possible Duplicate: Python: single instance of program I need to prevent a cron job from running concurrent instances when a job takes longer to complete than the launcher interval. I...

How do i unset a already set flag using fcntl? For e.g. I can set the socket to nonblocking mode using fcntl(sockfd, F_SETFL, flags | O_NONBLOCK) Now, i want to unset the O_NONBLOCK flag. I t...

I have a pretty complicated python program. Internally it has a logging system that uses an exclusive (LOCK_EX) fcntl.flock to manage global locking. Effectively, whenever a log message is dumped, ...

I have figured out that I must use ioctl. There are similar questions here: How to tell how much data is in a Socket's send buffer Determing the number of bytes ready to be recv()'d My ...

I'm trying to use redirects in C to redirect input to one file and then set standard output back to print to the screen. Could someone tell me what's wrong with this code? #include <stdio.h>...

I have a question about how flock() works, particularly in python. I have a module that opens a serial connection (via os.open()). I need to make this thread safe. It's easy enough making it thread...

From what I have been reading on The Open Group website on fcntl, open, read, and write, I get the impression that whether O_NONBLOCK is set on a file descriptor, and hence whether non-blocking I/O...

I have a Perl script that I'd like to run on Windows, using either Strawberry Perl or ActivePerl; I don't care which. This script however, uses flock() calls, which does not seem to be included in ...