|
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OUTPUT | NOTES | AUTHORS | SEE ALSO | AVAILABILITY | COLOPHON |
|
|
|
LSLOCKS(8) System Administration LSLOCKS(8)
lslocks - list local system locks
lslocks [options]
lslocks lists information about all the currently held file locks
in a Linux system.
Note that lslocks also lists OFD (Open File Description) locks,
these locks are not associated with any process (PID is -1). OFD
locks are associated with the open file description on which they
are acquired. This lock type is available since Linux 3.15, see
fcntl(2) for more details.
-b, --bytes
Print the SIZE column in bytes rather than in a human-
readable format.
-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).
--output-all
Output all available columns.
-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.
COMMAND
The command name of the process holding the lock.
PID The process ID of the process which holds the lock or -1
for OFDLCK.
TYPE The type of lock; can be FLOCK (created with flock(2)),
POSIX (created with fcntl(2) and lockf(3)) or OFDLCK
(created with fcntl(2).
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.
The lslocks command is meant to replace the lslk(8) command,
originally written by Victor A. Abell <abe@purdue.edu> and unmaintained
since 2001.
Davidlohr Bueso <dave@gnu.org>
flock(1), fcntl(2), lockf(3)
The lslocks command is part of the util-linux package and is
available from
https://www.kernel.org/pub/linux/utils/util-linux/.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found
at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you
have a bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-17.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
util-linux December 2014 LSLOCKS(8)
Pages that refer to this page: fcntl(2), flock(2), proc(5)
|
HTML rendering created 2020-12-21 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|