file descriptor

If the optional fd parameter is specified, it is interpreted as an integral file descriptor to be sent over the stream.

This can be very costly when you are monitoring several directories at once, and you may even reach a per-process file descriptor limit.

ACCEPT returns a normal file descriptor, which can be used for reading and writing in the standard way, the same as for files.

When the state of a file descriptor changes, the subsystem notifies the pollcache, which triggers a state transition in the pollcache.

Note: If the process that holds the open file descriptor becomes defunct, it will also hold those data blocks until the system is rebooted.

is the system call that creates an inotify instance and returns a file descriptor referring to the instance.

Obtains the first available file descriptor and sets it up for use.

File descriptor table A way of implementing file descriptors by treating them as indexes into an array.

There is no need to have each agent maintain its own file descriptor table.

You later discovered that lsof shows the file descriptor of a process and the associated file name.

As noted above, inotify uses a file descriptor, allowing programmers to use standard select or poll functions to watch for events.

By using leasing on the file descriptor, you take a lease with the kernel on a particular file.

The new file will have the close on exec flag turned off. That means the new file descriptor will remain open across exec calls?

The file descriptor for the deleted monitor file must be closed.

A file descriptor is an integer that refers to an open file or device, and it is used for reading and writing.

Constructs a FileWriter object associated with a file descriptor.

It cannot respond to a file descriptor immediately when the data becomes ready.

The logical file system is also responsible for managing the kernel's open file table and the per process file descriptor information.

When writing a file descriptor in this manner, closing the descriptor before the stream drains risks sending an invalid (closed) FD.

The pollset interface creates and maintains a file descriptor set and its interested events in the native (kernel) pollset layer.

Finally, a number refers to the application's file descriptor, which is an integer returned upon opening the file.

At the top is the open file object, which is referenced by a process's file descriptor list.

closes the file descriptor, and removes any watches still remaining on that descriptor.

These events can be things like timers, signals, data ready for reading on a file descriptor, and so on.

The pollset interface can perform best when the file descriptor set is not frequently updated.

The file descriptor used by inotify is obtained using a system call and does not have an associated device or file.

Each file descriptor in the set is described by a pollcache control block -- pccb.

Looking specifically at the file descriptor column, there are three different values represented in Listing 1.

The "fd" parameter is the file descriptor being operated on.

The file descriptor is merely an identifier for the process.

The file descriptor object for this socket.

The close file descriptor, or closefd, can be True or False.

So the file descriptor will remain open across exec calls.

fd is the file descriptor of the device file.

In some cases, you can also map a file descriptor to a plain file or another device into memory.

If False, the file descriptor is kept after the file is closed.

Read the bytes with the file descriptor.

Each pccb can be located in the pollcache based on a file descriptor hash.

It also decreases the likelihood that a maintainer will insecurely use the file name (they need to use the file descriptor instead).

When we open an existing file or create a new file, the kernel returns a file descriptor to the process.

You might also know that the standard output (the screen) is a file descriptor, too.

You then do the same thing for another file descriptor.

The file descriptor is used as the device handle.

Then, open the device driver and get the file descriptor.

Open the SCSI generic device file (such as sg1) to get the file descriptor of SCSI device.

fd is the file descriptor, a pointer to the file. For this example, use the following

After user foo logs in to AIX, run the limit command to verify that his file descriptor limit is set to 1000