man wlock (Commandes) - Tests or sets a file with POSIX-fcntl() write-locks
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 (framstag@belwue.de>.