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setlock(1) General Commands Manual setlock(1) NAME setlock - run a program with a file locked SYNTAX setlock [ -nNxX ] file program [ arg ... ] DESCRIPTION setlock opens file for writing (creating it if it does not exist), ob- tains an exclusive lock on it, and runs program. Normally the lock disappears when program exits. (Here's the complete story: program is given a descriptor for a locked ofile pointing to file. The lock disappears when this ofile is (1) closed by all the processes that have descriptors for it or (2) explic- itly unlocked.) OPTIONS -n No delay. If file is locked by another process, setlock gives up. -N (Default.) Delay. If file is locked by another process, set- lock waits until it can obtain a new lock. -x If file cannot be opened (or created) or locked, setlock exits zero. -X (Default.) If file cannot be opened (or created) or locked, setlock prints an error message and exits nonzero. SEE ALSO flock(2), lockf(3) setlock(1)
NAME | SYNTAX | DESCRIPTION | OPTIONS | SEE ALSO
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