Module « fcntl » Python 3.11.3

Fonction fcntl - module fcntl

Signature de la fonction fcntl

def fcntl(fd, cmd, arg=0) 

Description

help(fcntl.fcntl)

Perform the operation `cmd` on file descriptor fd.

The values used for `cmd` are operating system dependent, and are available
as constants in the fcntl module, using the same names as used in
the relevant C header files.  The argument arg is optional, and
defaults to 0; it may be an int or a string.  If arg is given as a string,
the return value of fcntl is a string of that length, containing the
resulting value put in the arg buffer by the operating system.  The length
of the arg string is not allowed to exceed 1024 bytes.  If the arg given
is an integer or if none is specified, the result value is an integer
corresponding to the return value of the fcntl call in the C code.