fsdb(1M)fsdb(1M)NAMEfsdb - file system debugger (generic)
FStype] specific_options] special
Always execute the command (see fsck(1M)) after running
The command can be used to patch up a damaged file system after a
crash. It is intended for experienced users only. The file system
type to be debugged is specified as FStype. Each file system type has
a unique structure requiring different debugging capabilities. The
manual entries for the file-system-specific should be consulted before
attempting any debugging or modifications.
Options and Arguments
recognizes the following options and arguments:
special The file name of the special file containing the
Specify the file system type on which to operate (see
fstyp(1M) and fs_wrapper(5)). If this option is
not included on the command line, then the file
system type is determined from the file by match‐
ing special with an entry in that file. If there
is no entry in then the file system type is
determined from the file
Specify suboptions specific to each file system type.
specific_options is a comma-separated list of
suboptions and/or keyword/attribute pairs sup‐
ported by the specific FStype.
Echo the completed command line, but perform no other action.
The command line is generated by incorporating
the user-specified options and other information
derived from the file. This option allows the
user to verify the command line.
Invoke the file system debugger on HFS file system
Display a completed command line without executing the debugger:
The previous command might display:
Only experienced users should use The failure to fully understand the
usage of and the file system's internal organization can lead to com‐
plete destruction of the file system and total loss of data.
was developed by HP and AT&T.
Specifies the default file system type
Static information about the file systems
SEE ALSOfsck(1M), fsdb_hfs(1M), fsdb_vxfs(1M), fstyp(1M), stat(2), fs_wrap‐