fuser(1M) fuser(1M)
NAME
fuser - identify processes using a file or file structure
SYNOPSIS
/usr/sbin/fuser [-[c|f]ku] files | resources [[-] [[c|f]ku]
files | resources] ...
DESCRIPTION
fuser outputs the process IDs of the processes that are using the
files or remote resources specified as arguments. Each process ID is
followed by a letter code, interpreted as follows: if the process is
using the file as
1) its current directory, the code is c,
2) its root directory, the code is r,
3) an open file, the code is o, or
4) its text file, the code is t.
For block special devices with mounted file systems, all processes
using any file on that device are listed. For remote resource names,
all processes using any file associated with that remote resource
(Remote File Sharing) are reported. For all other types of files (text
files, executables, directories, devices, etc.) only the processes
using that file are reported.
OPTIONS
-c May be used with files that are mount points for file systems.
With that option the report is for use of the mount point and any
files within that mounted file system.
-f When this is used, the report is only for the named file, not for
files within a mounted file system.
-u The user login name, in parentheses, also follows the process ID.
-k The SIGKILL signal is sent to each process. Since this option
spawns kills for each process, the kill messages may not show up
immediately [see kill(2)].
If more than one group of files are specified, the options may be
respecified for each additional group of files. A lone dash cancels
the options currently in force.
The process IDs are printed as a single line on the standard output,
separated by spaces and terminated with a single new line. All other
output is written on standard error.
Any user with permission to read /dev/kmem and /dev/mem can use fuser.
Only the superuser can terminate another user's process.
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NOTES
If an RFS resource from a pre Release 4 server is mounted, fuser can
only report on use of the whole file system, not on individual files
within it.
Because fuser works with a snapshot of the system image, it may miss
processes that begin using a file while fuser is running. Also,
processes reported as using a file may have stopped using it while
fuser was running. These factors should discourage the use of the -k
option.
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FILES
/stand/unix
for system namelist
/dev/kmem
for system image
/dev/mem
also for system image
SEE ALSO
ps(1), mount(1M), kill(2), signal(2).
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