Provided by: util-linux_2.27.1-6ubuntu2_i386 bug


       lslocks - list local system locks


       lslocks [options]


       lslocks  lists information about all the currently held file locks in a
       Linux system.


       -J, --json
              Use JSON output format.

       -n, --noheadings
              Do not print a header line.

       -o, --output list
              Specify which output columns to print.  Use --help to get a list
              of all supported columns.

              The default list of columns may be extended if list is specified
              in the format +list (e.g. lslocks -o +BLOCKER).

       -p, --pid pid
              Display only the locks held by the process with this pid.

       -r, --raw
              Use the raw output format.

       -u, --notruncate
              Do not truncate text in columns.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.


              The command name of the process holding the lock.

       PID    The process ID of the process which holds the lock.

       TYPE   The type of lock; can be FLOCK (created with flock(2)) or  POSIX
              (created with fcntl(2) and lockf(3)).

       SIZE   Size of the locked file.

       MODE   The  lock's access permissions (read, write).  If the process is
              blocked and waiting for the lock, then  the  mode  is  postfixed
              with an '*' (asterisk).

       M      Whether  the  lock is mandatory; 0 means no (meaning the lock is
              only advisory), 1 means yes.  (See fcntl(2).)

       START  Relative byte offset of the lock.

       END    Ending offset of the lock.

       PATH   Full path of the lock.  If  none  is  found,  or  there  are  no
              permissions  to read the path, it will fall back to the device's
              mountpoint.  The path might be truncated;  use  --notruncate  to
              get the full path.

              The PID of the process which blocks the lock.


       The lslocks command is meant to replace the lslk(8) command,
       originally written by Victor A. Abell <> and unmaintained
       since 2001.


       Davidlohr Bueso <>


       flock(1), fcntl(2), lockf(2)


       The  lslocks command is part of the util-linux package and is available