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LSLOCKS(8)                            System Administration                            LSLOCKS(8)

NAME
       lslocks - list local system locks

SYNOPSIS
       lslocks [options]

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

OPTIONS
       -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.

OUTPUT
       COMMAND
              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.

       BLOCKER
              The PID of the process which blocks the lock.

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

AUTHORS
       Davidlohr Bueso 

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

AVAILABILITY
       The lslocks command is part of the util-linux package and is available from ftp://ftp.ker‐
       nel.org/pub/linux/utils/util-linux/.

util-linux                                December 2014                                LSLOCKS(8)

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