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fstyp(1m)

System Administration Commands                                       fstyp(1M)



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 (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).

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:




       tab()  box;  cw(2.75i)  |cw(2.75i)  lw(2.75i)   |lw(2.75i)   ATTRIBUTE
       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  parti‐
       tion.



SunOS 5.11                        19 Dec 2007                        fstyp(1M)
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