fuser(1M)						  System Administration Commands						 fuser(1M)

NAME

       fuser - identify users of files and devices

SYNOPSIS

       /usr/sbin/fuser [-c | -d | -f]  [-nu] [-k | -s sig]  files [ [- ] [-c | -d | -f]  [-nu] [-k | -s sig]  files] ...

DESCRIPTION

       The fuser utility displays the process IDs of the processes that are using the files specified as arguments.

       Each process ID is followed by a letter code. These letter codes are interpreted as follows. If the process is using the file as

       c	Indicates that the process is using the file as its current directory.

       m	Indicates that the process is using a file mapped with mmap(2). See mmap(2) for details.

       n	Indicates that the process is holding a non-blocking mandatory lock on the file.

       o	Indicates that the process is using the file as an open file.

       r	Indicates that the process is using the file as its root directory.

       t	Indicates that the process is using the file as its text file.

       y	Indicates that the process is using the file as its controlling terminal.

       For  block  special devices with mounted file systems, all processes using any file on that device are listed. For all types of files (text
       files, executables, directories, devices, and so forth), only the processes using that file are reported.

       For all types of devices, fuser also displays any known kernel consumers that have the device open. Kernel consumers are displayed  in  one
       of the following formats:

       [module_name]
       [module_name,dev_path=path]
       [module_name,dev=(major,minor)]
       [module_name,dev=(major,minor),dev_path=path]

       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 can run fuser, but only the superuser can terminate another user's process.

OPTIONS

       The following options are supported:

       -c	Reports on files that are mount points for file systems, and any files within that mounted file system.

       -d	Report	device	usage  information for all minor nodes bound to the same device node as the specified minor node. This option does
		not report file usage for files within a mounted file system.

       -f	Prints a report for the named file, not for files within a mounted file system.

       -k	Sends the SIGKILL signal to each process. Since this option spawns kills for each process, the kill messages may not show up imme-
		diately (see kill(2)). No signals will be sent to kernel file consumers.

       -n	Lists only processes with non-blocking mandatory locks on a file.

       -s sig	Sends a signal to each process. The sig option argument specifies one of the symbolic names defined in the <signal.h> header, or a
		decimal integer signal number.	If sig is a symbolic name, it is recognized in a case-independent fashion, without the SIG prefix.
		The -k option is equivalent to -s KILL or -s 9. No signals will be sent to kernel file consumers.

       -u	Displays the user login name in parentheses following the process ID.

EXAMPLES

       Example 1: Reporting on the Mount Point and Files

       The following example reports on the mount point and files within the mounted file system.

       example% fuser -c /export/foo

       Example 2: Restricting Output when Reporting on the Mount Point and Files

       The  following  example reports on the mount point and files within the mounted file system, but the output is restricted to processes that
       hold non-blocking mandatory locks.

       example% fuser -cn /export/foo

       Example 3: Sending SIGTERM to Processes Holding a Non-blocking Mandatory Lock

       The following command sends SIGTERM to any processes that hold a non-blocking mandatory lock on file /export/foo/my_file.

       example% fuser -fn -s term /export/foo/my_file

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of fuser: LANG, LC_ALL	LC_CTYPE,  LC_MES-
       SAGES, and NLSPATH.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ps(1), mount(1M), kill(2), mmap(2), signal(3C), attributes(5), environ(5), standards(5)

NOTES

       Because	fuser  works with a snapshot of the system image, it may miss processes that begin using a file while fuser is running. Also, pro-
       cesses reported as using a file may have stopped using it while fuser was running. These factors  should  discourage  the  use  of  the	-k
       option.

SunOS 5.10							    21 Oct 2003 							 fuser(1M)