NAME
wlock - Tests or sets a file with POSIX-fcntl() write-locks
SYNOPSIS
wlock [ -s [-a seconds ]] [ -t] [ -v] [ -b begin ] [ -l length ] file
or
wlock [ -s ] [ -v] [ -b begin ] [ -l length ] file program [ arguments ]
DESCRIPTION
This program sets or tests advisory locks conforming to POSIX fcntl() call. You may specify optionaly a program to start it within the lock context.
OPTIONS
These options are accepted. If a program is provided as argument wlock will start it.
- -s
-
Sets the lock.
- -t
-
Test the lock (default).
- -v
-
Verbose output.
- -b begin
-
The lock starts at byte #begin.
- -l length
-
The lock will be length bytes long.
- -a seconds
-
The lock is active for seconds (default=86400).
RETURN VALUES
- 0
-
In test mode this means that the file is locked. In set mode it indicates the succesful creation of the lockfile
- 1
-
The file is not locked. Only available in testmode.
- 2
-
Some error has occurred.
AUTHOR
wlock has been written by Ulli Horlacher ([email protected]>.