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LSLOCKS

Section: System Administration (8)
Updated: December 2014
Index Return to Main Contents
 

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

-i, --noinaccessible
Ignore lock files which are inaccessible for the current user.
-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 and "..." is appended to the path. 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(3)

 

AVAILABILITY

The lslocks command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
OUTPUT
NOTES
AUTHORS
SEE ALSO
AVAILABILITY


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