fuser - Lists process IDs of processes that are using one
or more files or file structures
/usr/sbin/fuser [-cfu] file...
[Tru64 UNIX] The following format shows extensions not
included in the XCU specification for this utility:
/usr/sbin/fuser [ -cdfku] [ -h] [-vH ] file ...
Interfaces documented on this reference page conform to
industry standards as follows:
fuser: XCU5.0
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
Identifies file as a mount point. In this case, fuser
reports on any files that are open in the mounted file
system. Reports any referenced files that have been
deleted including the referencing PID and the block count
for the file in 512 byte block units. Requests a report
only for the specified files. If a specified file is a
mount point, fuser reports only on that file, not on any
files below it. [Tru64 UNIX] Suppresses column headings
in fuser output when used with the -v option. [Tru64
UNIX] Directs fuser to display information about its command-line
options. [Tru64 UNIX] Directs fuser to send a
SIGKILL signal to each corresponding process. The kill
messages might not show up immediately because the signals
operate asynchronously. Directs fuser to show the user
login name, in parentheses, associated with each process
ID. [Tru64 UNIX] Directs fuser to display results in
verbose form.
[Tru64 UNIX] Directs fuser to ignore previous option settings
for the next set of file parameters. The - operand
allows you to apply different options to different sets of
files in the same command line. Specifies the pathname of
the file or the mount point of the file system on which
fuser reports.
The fuser utility writes to standard output the process
IDs of processes that are running on the local system and
have one or more files or file structures in use. The
utility writes to standard error additional information
about these resources that indicates how each resource is
being used.
The fuser utility reports on processes that reference the
file parameter. When run with root privilege, fuser
reports on all processes. Otherwise, running fuser reports
only on those processes with a matching effective UID or
real UID.
The utility uses the following format to write the process
ID for each process using each file:
"%d", process_id
The fuser utility writes diagnostic messages to standard
error.
In addition, the utility writes the following information
to standard error: The pathname of each file, immediately
followed by a colon. For each process ID written to standard
output, one of the following characters: If the process
is using the file as its current directory. [Tru64
UNIX] If the process is using a memory-mapped file.
[Tru64 UNIX] If the process is using the file as the parent
of its current directory. If the process is using the
file as its root directory. [Tru64 UNIX] If the process
has the file open. [Tru64 UNIX] If the process is using
the file as its controlling tty. [Tru64 UNIX] If the
process is using the text file as an executable.
If you specify the -u option, characters indicating
the use of the file are followed immediately by the
user name, in parentheses, that corresponds to the
process's real user ID. If the user name cannot be
resolved from the process's real user ID, the process's
real user ID is written instead of the user
name.
When standard output and standard error are directed to
the same file, the utility intersperses output so that the
file appears at the start of each line, followed by the
process ID and the characters indicating file use. Then,
if the -u option is specified, the utility writes the user
name or user ID for each process that is using that file.
The utility writes a newline character at the end of output
for each file.
[Tru64 UNIX] The fuser utility may not report on processes
that begin using a file while the utility is running.
Furthermore, processes that fuser reports are using
a file may have stopped using it while the utility was
running.
If an accounting file has been opened by an acct() sytem
call, the fuser command and system call will report any
match as being open by the kernel task.
The fuser utility returns the following exit values: Successful
completion. An error occurred.
The following command lists the process IDs of processes
using the /etc/hosts file: fuser /etc/hosts The following
command writes to standard output the process IDs of processes
that are using the current directory. The command
writes to standard error an indication of how those processes
are using the directory and the user names associated
with those processes. fuser -fu.
ENVIRONMENT VARIABLES [Toc] [Back] The following environment variables affect this utility:
Provides a default value for the locale variables that are
unset or null. If LANG is unset or null, the corresponding
value from the POSIX (C) locale is used. If any of the
locale variables contain an invalid setting, the utility
behaves as if none of the variables had been set. If set
to a non-empty string value, overrides the values of all
the other locale variables. Specifies the locale used to
interpret sequences of bytes of text data as characters
(for example, determines whether arguments contain singlebyte
or multibyte characters). Specifies the locale that
affects the format and contents of diagnostic messages
written to standard error. Determines the location of
message catalogs for the processing of LC_MESSAGES.
Functions: fuser(2), kill(2)
fuser(8)
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