NAME

fstyp − determine file system identifier

SYNOPSIS

fstyp special

DESCRIPTION

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

The directory /etc/fstyp.d contains a program for each file system 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 file-system identifier for that type and exits with a return code of 0; otherwise it prints error messages on standard error and exits with a non-zero return code.  fstyp runs the programs in /etc/fstyp.d in alphabetical order, passing special as an argument; if any program succeeds, its file-system type identifier is printed and fstyp exits immediately. If no program succeeds, fstyp prints "Unknown_fstyp" to indicate failure. 

WARNING

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

SEE ALSO

mount(1M). 
mount(2), sysfs(2) in the INTER­ACTIVE SDS Guide and Programmer’s Reference Manual. 

\*U  —  Version 1.0