LinuxGuruz
  • Last 5 Forum Topics
    Replies
    Views
    Last post


The Web Only This Site
  • BOOKMARK

  • ADD TO FAVORITES

  • REFERENCES


  • MARC

    Mailing list ARChives
    - Search by -
     Subjects
     Authors
     Bodies





    FOLDOC

    Computing Dictionary




  • Text Link Ads






  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    flock

    
    
    

    SYNOPSIS

           flock [-sxon] [-w timeout] lockfile [-c] command...
    
           flock [-sxon] [-w timeout] lockdir [-c] command...
    
           flock [-sxun] [-w timeout] fd
    
    
    

    DESCRIPTION

           This  utility  manages  flock(2) locks from within shell scripts or the
           command line.
    
           The first and second forms wraps the lock around the executing  a  com-
           mand,  in a manner similar to su(1) or newgrp(1).  It locks a specified
           file or directory, which is created (assuming appropriate permissions),
           if it does not already exist.
    
           The  third form is convenient inside shell scripts, and is usually used
           the following manner:
    
           (
             flock -s 200
             # ... commands executed under lock ...
           ) 200>/var/lock/mylockfile
    
           The mode used to open the file doesn't matter to flock; using >  or  >>
           allows  the  lockfile  to be created if it does not already exist, how-
           ever, write permission is required; using  <  requires  that  the  file
           already exists but only read permission is required.
    
           By  default,  if  the  lock cannot be immediately acquired, flock waits
           until the lock is available.
    
    
    

    OPTIONS

           -s, --shared
                  Obtain a shared lock, sometimes called a read lock.
    
           -x, -e, --exclusive
                  Obtain an exclusive lock, sometimes called a write  lock.   This
                  is the default.
    
           -u, --unlock
                  Drop  a  lock.   This  is  usually not required, since a lock is
                  automatically dropped when the file is closed.  However, it  may
                  be  required  in special cases, for example if the enclosed com-
                  mand group may have forked a background process which should not
                  be holding the lock.
    
           -n, --nb, --nonblock
                  Fail  (with an exit code of 1) rather than wait if the lock can-
                  not be immediately acquired.
    
           -w, --wait, --timeout seconds
    
    
    

    AUTHOR

           Written by H. Peter Anvin <hpa@zytor.com>.
    
    
    

    COPYRIGHT

           Copyright (C) 2003-2006 H. Peter Anvin.
           This is free software; see the source for copying conditions.  There is
           NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
           PURPOSE.
    
    
    

    SEE ALSO

           flock(2)
    
    
    

    AVAILABILITY

           The flock command is part of the util-linux-ng package and is available
           from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
    
    
    

    flock utility 4 Feb 2006 FLOCK(1)

    
    
  • MORE RESOURCE


  • Linux

    The Distributions





    Linux

    The Software





    Linux

    The News



  • MARKETING






  • Toll Free

webmaster@linuxguruz.com
Copyright © 1999 - 2016 by LinuxGuruz