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)).
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 <[email protected]> and unmaintained since 2001.
AUTHORS
Davidlohr Bueso <[email protected]>
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 February 2012 LSLOCKS(8)
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