FreeBSD Manual Pages
setlock(8) System Manager's Manual setlock(8) NAME setlock - runs another program with a file locked. SYNOPSIS setlock [ -nNxX ] fn child DESCRIPTION fn is a single argument. child consists of one or more arguments. setlock opens fn for writing (creating it if it does not exist), ob- tains an exclusive lock on it, and runs child. Normally the lock disappears when child exits. Here's the complete story: child is given a descriptor for a locked ofile pointing to the disk file named fn. The lock disappears when this ofile is o closed by all the processes that have descriptors for it or o explicitly unlocked. OPTIONS -n No delay. If fn is locked by another process, setlock gives up. -N (Default.) Delay. If fn is locked by another process, setlock waits until it can obtain a new lock. -x If fn cannot be opened (or created) or locked, setlock exits zero. -X (Default.) If fn cannot be opened (or created) or locked, set- lock prints an error message and exits nonzero. SEE ALSO envdir(8), envini(8), envuidgid(8), fghack(8), multilog(8), pgr- phack(8), readproctitle(8), setuidgid(8), setuser(8), softlimit(8), su- pervise(8), svc(8), svok(8), svscan(8), svscanboot(8), svstat(8), tai64n(8), tai64nlocal(8) setlock(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO
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