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lslocks

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

       -h, --help
	      Print a help text and exit.

       -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.

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  mount-
	      point.  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 <abe@purdue.edu> and unmaintained since 2001.

AUTHORS

       Davidlohr Bueso <dave@gnu.org>

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.kernel.org/pub/linux/utils/util-linux/.

util-linux							   February 2012							LSLOCKS(8)