The
fuser
utility writes to stdout the PIDs of processes that have one or
more named files open.
For block and character special devices, all processes using files
on that device are listed.
A file is considered open by a process if it was explicitly opened,
is the working directory, root directory, jail root directory,
active executable text, kernel trace file or the controlling terminal
of the process.
If
-m
option is specified, the
fuser
utility will also look through mmapped files.
The following options are available:
-c
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Treat files as mount points and report on any files open in the file system.
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-f
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The report must be only for named files.
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-k
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Send signal to reported processes
( SIGKILL by default).
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-M core
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Extract values associated with the name list from the specified core
instead of the default
/dev/kmem.
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-m
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Search through mmapped files too.
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-N system
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Extract the name list from the specified system instead of the default,
which is the kernel image the system has booted from.
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-s signal
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Use given signal name instead of default
SIGKILL.
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-u
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Write the user name associated with each process to stderr.
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The following symbols, written to stderr will indicate how files are used:
a
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The file is open as append only
( O_APPEND was specified).
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c
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The file is the current workdir directory of the process.
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d
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The process bypasses fs cache while writing to this file
( O_DIRECT was specified).
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e
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Exclusive lock is hold.
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j
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The file is the jail root of the process.
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m
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The file is mmapped.
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r
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The file is the root directory of the process.
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s
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Shared lock is hold.
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t
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The file is the kernel tracing file for the process.
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w
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The file is open for writing.
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x
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The file is executable text of the process.
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y
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The process uses this file as its controlling tty.
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