fstyp(1M)							     fstyp(1M)

NAME    [Toc]    [Back]

     fstyp - determine filesystem identifier

SYNOPSIS    [Toc]    [Back]

     fstyp special

DESCRIPTION    [Toc]    [Back]

     fstyp allows the user to determine	the filesystem identifier of mounted
     or	unmounted filesystems using heuristic programs.	 The filesystem	type
     is	required by mount(2) and sometimes by mount(1M)	to mount filesystems
     of	different types.

     The directory /etc/fstyp.d	contains a program for each filesystem type to
     be	checked; each of these programs	applies	some appropriate heuristic to
     determine whether the supplied special file is of the type	for which it
     checks.  If it is,	the program prints on standard output the usual
     filesystem	identifier for that type and exits with	a return code of 0;
     otherwise it prints error messages	on standard error and exits with a
     nonzero return code.

     fstyp runs	the programs in	/etc/fstyp.d in	alphabetical order, passing
     special as	an argument; if	any program succeeds, its filesystem type
     identifier	is printed and fstyp exits immediately.	 If no program
     succeeds, fstyp prints "Unknown_fstyp" to indicate	failure.

WARNING    [Toc]    [Back]

     The use of	heuristics implies that	the result of fstyp is not guaranteed
     to	be accurate.

SEE ALSO    [Toc]    [Back]

     mount(1M),	mount(2), sysfs(2).


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