Last Change: 2018-09-07, 16:50
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wlock − Tests or sets a file with POSIX-fcntl() write-locks
wlock [ −s [−a seconds ]] [ −t] [ −v] [ −b begin ] [ −l length ] file
or
wlock [ −s ] [ −v] [ −b begin ] [ −l length ] file program [ arguments ]
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.
These options are accepted. If a program is provided as argument wlock will start it.
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−s |
Sets the lock. |
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−t |
Test the lock (default). |
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−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).
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0 |
In test mode this means that the file is locked. In set mode it indicates the succesful creation of the lockfile |
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1 |
The file is not locked. Only available in testmode. |
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2 |
Some error has occurred. |
wlock has been written by Ulli Horlacher (framstag AT belwue DOT de>.