Questions tagged [flock]

I was confused for a very long time with the meaning of the -n flag for flock(1). Basically there are many guides for this tool, and often what we see is some command like flock -n 100. Here, fd number 100 is associated with some lockfile and used…

flock is associated with open-file-description, and open(2) creates new open-file-description. So invoking flock(1) in two separate shells will open the lock file separately and result in two open-file-descriptions. How could flock(1) know the lock…