Flock

Lock a file (advisory lock)

Declaration

Source position: line 0

Description

FLock implements file locking. it sets or removes a lock on the file F. F can be of type Text or File, or it can be a linux filedescriptor (a longint) Mode can be one of the following constants :

LOCK_SH

sets a shared lock.

LOCK_EX

sets an exclusive lock.

LOCK_UN

unlocks the file.

LOCK_NB

This can be OR-ed together with the other. If this is done the application doesn't block when locking.

The function returns True if successful, False otherwise.

Errors

If an error occurs, it is reported in LinuxError.

See also

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