FSTYP(1M)FSTYP(1M)NAMEfstyp - determine file system type
SYNOPSISfstyp [-a | -v] special [:logical-drive]
DESCRIPTIONfstyp allows the user to determine the file system type of unmounted
file systems using heuristic programs.
An fstyp module for each file system type to be checked is executed;
each of these modules applies an 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 (for example, ``ufs'') and exits with a return
code of 0; if none of the modules succeed, the error message
unknown_fstyp (no matches) is returned and the exit status is 1. If
more than one module succeeds, the error message unknown_fstyp (multi‐
ple matches) is returned and the exit status is 2. Other errors are
printed in the same format.
This command is unreliable and its results should not be used to make
any decisions about subsequent use of a storage device or disk parti‐
tion.
OPTIONS-a
Output all available file system attributes. If a file system has
been successfully identified, and this option is specified, the
FSType identifier is followed by one or more "name-value" pairs,
one per line, in the format:
name: value
The following conventions are recognized for the file system
attributes:
o String values are put in single quotes.
o Nested "name-value" list increases the indentation of
its values by four whitespaces.
o For an array of "name-value" pairs, one array entry is
printed per line, with the index following the name in
square brackets.
For instance, in the following example, "top_list" is a "name-
value" list, consisting of a string array "string_array" and a
"name-value" list array "list_array". The second "list_array"ele‐
ment is an integer array "int_array" containing three elements.
top_string: 'String'
top_list:
string_array[0]: 'S0'
string_array[1]: 'S1'
list_array[0]:
int_one: 1
string_two: 'S2'
list_array[1]:
int_array[0]: 1
int_array[1]: 2
int_array[2]: 3
In addition to the FSType-specific attributes, the following
generic attributes may be present:
gen_clean
Allowable values are "true" or "false". If the value
is "false", the file system is damaged or was not
unmounted cleanly and the fsck(1M) command must be
run before this file system can be mounted.
gen_guid
Globally unique identifier. This string uniquely
identifies the file system.
gen_version
A string describing the file system version.
gen_volume_label
Volume label, a human-readable string used to
either describe or identify the file system.
-v
Produce verbose output. This is usually information about the
file systems superblock and varies across different FSTypes. See
ufs(7FS), mkfs_ufs(1M), and tunefs(1M) for details.
USAGE
See largefile(5) for the description of the behavior of fstyp when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
SEE ALSOfsck(1M), mkfs_ufs(1M), tunefs(1M), attributes(5), libfstyp(3LIB),
largefile(5), hsfs(7FS), ufs(7FS), pcfs(7FS)NOTES
The use of heuristics implies that the result offstyp is not guaranteed
to be accurate.
This command is unreliable and its results should not be used to make
any decisions about subsequent use of a storage device or disk parti‐
tion.
Dec 19, 2007 FSTYP(1M)