fuser man page on Tru64

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fuser(2)							      fuser(2)

NAME
       fuser  -	 Reports  PIDs	and  UIDs  for	files, file systems and/or the
       devices attached to them.

SYNOPSIS
       #include <sys/fuser.h>

       int fuser(
	       char *file,
	       long flag,
	       struct f_user fuser_array[],
	       long sizeof_fuser_array );

PARAMETERS
       Specifies the file name.	 Specifies one of the  following  values.   If
       none of the following are values are specified, the default is to match
       open files.  Matches only file ids.   Provides  mount  point  matching.
       Matches	deleted files on the mount point specified by file.  Specifies
       the array.  Specifies the number of elements in the fuser array.

DESCRIPTION
       The fuser function reports a list of PIDs and UIDs that are  associated
       with  a	specified  file,  file	system,	 and/or	 the  devices that are
       attached to them.

       The  fuser  function  can  report  back	additional  information	 about
       “matches”  by  ORing  one of the following constants that can be passed
       back in the member fu_flags: Current directory Current directory Parent
       of the current directory At least one file open, but the number open is
       not known.  Executable image.  Controlling terminal Trace At least  one
       file is mmapped

RETURN VALUES
       On  success,  the fuser function returns the number of fuser_array ele‐
       ments that were found. The contents of the structure are as follows:

       typedef struct  f_user {
	       pid_t   fu_pid;
	       int     fu_flags;
	       uid_t   fu_uid; } f_user_t;

       If an error has occurred, the fuser function returns -1 and sets	 errno
       to indicate the error.

ERRORS
       If  the	fuser function fails, errno may be set to one of the following
       values: The array is not large enough to hold the number of array  ele‐
       ments returned or the array structure cannot be filled The file parame‐
       ter specified does not exist

EXAMPLES
       Open regular files and special files are matched using the flag parame‐
       ter  set	 at  0L. Thus, if process 127 and 3220 open the /home/try file
       simultaneously and the fuser function is	 active,  the  PIDs  and  UIDs
       associated  with	 the  home/try	file  are reported as in the following
       example:

	      fuser("/home/try", 0L, fuser_array, \
		   (long) (sizeof (fuser_array)/sizeof(fuser_array[0])); Simi‐
	      larly,  if the special device file /dev/ttyp2 is open by process
	      32, then that PID and its associated UID are reported as in  the
	      following example:

	      fuser("/dev/ttyp2", 0L, fuser_array, \
		   (long) (sizeof (fuser_array)/sizeof(fuser_array[0]));

								      fuser(2)
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