funlockfile()

Updated: April 19, 2023

Release ownership of a file

Synopsis:

#include <stdio.h>

void funlockfile( FILE* file );

Arguments:

file
A pointer to the FILE object for the file you want to unlock.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The funlockfile() function is used to release ownership of file granted to the thread by a call to flockfile() or ftrylockfile(). The behavior is undefined if a thread other than the current owner calls the funlockfile() function.

For more information, see flockfile().

Classification:

POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes