FreeBSD Manual Pages
LCKDO(1) moreutils LCKDO(1) NAME lckdo - run a program with a lock held SYNOPSIS lckdo [options] {lockfile} {program} [arguments] DESCRIPTION lckdo runs a program with a lock held, in order to prevent multiple processes from running in parallel. Use just like nice or nohup. Now that util-linux contains a similar command named flock, lckdo is depre- cated, and will be removed from some future version of moreutils. OPTIONS -w If the lock is already held by another process, wait for it to complete instead of failing immediately. -W {sec} The same as -w but wait not more than sec seconds. -e Execute the program directly without forking and waiting (keeps an ex- tra file descriptor open). -E {nnn} Set the file descriptor number to keep open when exec()ing (implies -e). -n Do not create the lock file if it does not exist. -q Produce no output if lock is already held. -s Lock in shared (read) mode. -x Lock in exclusive (write) mode (default). -t Test for lock existence. EXIT STATUS If the lock was successfully acquired, the return value is that of the pro- gram invoked by lckdo. If the lock couldn't be acquired, EX_TEMPFAIL is re- turned. If there was a problem opening/creating or locking the lock file, EX_CANTCREAT or EX_OSERR will be returned. AUTHOR Michael Tokarev moreutils 2007-08-15 LCKDO(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | AUTHOR
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=lckdo&sektion=1&manpath=FreeBSD+Ports+15.1.quarterly>