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fstyp

Name
     fstyp - determine file system type

Synopsis
     fstyp [-a | -v] special [:logical-drive]

Description
     fstyp 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  (multiple  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 partition.

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 inden-
                    tation 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"element  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).

Attributes
     See attributes(5) for descriptions of the  following  attri-
     butes:



     tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)  ATTRI-
     BUTE TYPEATTRIBUTE VALUE _ Availabilitysystem/core-os

See Also
     fsck(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 partition.
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