FSTAT(8)						      System Manager's Manual							  FSTAT(8)

NAME

       fstat - file status

SYNOPSIS

       fstat [ -u user ] [ -p pid ] [ filename...  ]

DESCRIPTION

       Fstat identifies open files.  A file is considered open if a process has it open, if it is the working directory for a process, or if it is
       an active pure text file.  If no options are specified, fstat reports on all open files.

       Options:

       -u    Report all files open by a specified user.

       -p    Report all files open by a specified process id.

       filename...
	     Restrict reports to the specified files.  If the file is a block special file, fstat additionally reports on any open files  on  that
	     device, treating it as a mounted file system.

       The following fields are printed

       USER  The username of the owner of the process.

       CMD   The command name of the process.

       PID   The process id.

       FD    The  file	number in the per-process open file table.  The special names "text" and "wd" mean that the file is the pure text inode or
	     the working directory for the process.  If the file number is followed by an asterick (*), then the file is not an inode, but  either
	     a	socket,  fifo, or has an error of some kind. In this case the rest of the entry is variable format, doesn't correspond to the rest
	     of the headings, and is enclosed in parenthesis.  The following paragraph describing sockets will explain the variable format.

       DEVICE
	     Major minor number of the device this file exists on.

       INODE The inode number of the file.

       SIZE  The size in bytes of the file.

       TYPE  The type of the file. (see sys/file.h)

       Sockets The formating of open sockets depends on the protocol domain.  In all cases the first field is the domain name, the second field is
       the  socket type (stream, dgram, etc), and the third is the socket flags field (in hex).  The remaining fields are protocol dependent.  For
       tcp, it is the address of the tcpcb, and for udp, the inpcb (socket pcb).  For unix domain sockets, its the address of the socket  pcb  and
       the  address  of the connected pcb (if connected).  Otherwise the protocol number and address of the socket itself are printed. The idea is
       not to duplicate netstat, but to make available enough information for further analysis.  For example, the addresses  mentioned	above  are
       the  addresses  which the "netstat -A" command would print for tcp, udp, and unixdomain.  Note that since pipe(2) is implemented with sock-
       ets, a pipe appears as a connected unix domain stream socket.  A unidirectional unix domain socket indicates the direction of flow with	an
       arrow ("<-" or "->"), and a full duplex socket shows a double arrow ("<->").

BUGS

       Socket information clutters the output.

       Since fstat takes a snapshot of the system, it is only correct for a very short period of time.

SEE ALSO

       ps(1), pstat(8)

4th Berkeley Distribution					 December 12, 1987							  FSTAT(8)