Unix-specific services

All modules

fcntl

Unixnot WASI

This module performs file control and I/O control on file
descriptors.  It is an interface to the fcntl() and ioctl() Unix
routines.  File descriptors can be obtained with the fileno() method of
a file or socket object.

© Python Software Foundation. PSF License Version 2 · Official docs ↗

Symbols in fcntl

f

fcntl: Perform the operation cmd on file descriptor fd.
flock: Perform the lock operation on file descriptor fd.

i

ioctl: Perform the operation request on file descriptor fd.

l

LOCK_EX: Acquire an exclusive lock.
LOCK_NB: Bitwise OR with any of the other three LOCK_* constants to make the request non-blocking.
LOCK_SH: Acquire a shared lock.
LOCK_UN: Release an existing lock.
lockf: A wrapper around the fcntl() locking calls.