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xpeek (8)
  • >> xpeek (8) ( Linux man: Команды системного администрирования )
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    NAME

    xpeek 
    
    - shell-type JFS file system editor
    

     

    SYNOPSIS

    xpeek device

     

    DESCRIPTION

    xpeek is a program which can be used to perform various low-level actions on a JFS formatted device.

    device is the special file name corresponding to the actual device to be edited (e.g. /dev/hdb1).

    xpeek must be run as root.

     

    COMMANDS

    a[lter] <block> <offset> <hex_string>

     replaces the data located at the  <offset> of <block> with <hex_string>

    <block> is the block number - given in decimal

    <offset> is the offset within that block - given in hexadecimal

    <hex_string> is an even-numbered string of hexadecimal digits to write to the disk

    b[tree] <block> [<offset>]
    * not implemented yet *
     displays one node of the btree located at <offset> of <block> and enters a subcommand mode to navigate the btree

    SUBCOMMANDS:
     l => visit left sibling
     m => modify current node
     p => visit parent node
     r => visit right sibling
     [0-9] => visit the n'th child node
     x => exit subcommand mode

    cb[blfsck]

     displays the area used by ClearBadBlockList for communication with fsck

    SUBCOMMANDS:
     m => modify entries
     x => exit subcommand mode
     

    dir[ectory] <inode_number> [<file_set>]

     displays the directory entries at <inode_number> and enters subcommand mode

    <inode_number> is the directory's inode - given in decimal

    <file_set> currently must be zero

    SUBCOMMANDS:
     m => modify entries
     x => exit subcommand mode
     

    d[isplay] [<block> [<offset> [<format> [<count>]]]]
    displays <count> objects located at the <offset> of <block> in <format>

    <block> is the block number - given in decimal

    <offset> is the offset within <block> - given in hexadecimal

    <format> is one of the following:
     a => ascii
     b => block allocation map
     d => decimal
     i => inode
     I => inode allocation map
     s => superblock
     x => hexadecimal
     X => extent allocation descriptor

    <count> is the number of objects to display - given in decimal

    dm[ap]

     displays aggregate disk (block) map

    SUBCOMMANDS
     m => modify map fields
     f => display free count
     t => display tree levels
     x => exit subcommand mode

    dt[ree] <inode_number> [<file_set>]

     displays root of the directory btree located at <inode_number> and enters a subcommand mode to navigate the btree

    <inode_number> is the directory's inode - given in decimal

    <file_set> currently must be zero

    SUBCOMMANDS
     l => visit left sibling
     m => modify current node
     p => visit parent node (not parent directory)
     r => visit right sibling
     [0-9] => visit the n'th child node
     x => exit subcommand mode

    fsckw[sphdr]

     displays the header of the fsck workspace in the aggregate

    SUBCOMMANDS:
     m => modify entries
     x => exit subcommand mode
     

    h[elp] [<command>]

     displays help for <command>
     if no command is given, all possible commands are displayed

    ia[g] [<IAG_number>] [a | s | <file_set>]

     displays IAG information for  <IAG_number> and enters subcommand mode

    <IAG_number> is given in decimal

    a is to use the primary aggregate inode table

    s is to use the secondary aggregate inode table

    <file_set> currently must be zero

    SUBCOMMANDS
     e => display/modify inode extents map
     m => modify IAG
     p => display/modify persistent map
     w => display/modify working map
     x => exit subcommand mode

    i[node] [<inode_number>] [a | s | <file_set>]

     displays inode information for <inode_number> and enters subcommand mode

    <inode_number> is given in decimal

    a is to use the primary aggregate inode table

    s is to use the secondary aggregate inode table

    <file_set> currently must be zero

    SUBCOMMANDS
     a => display/modify inode's ACL
     m => modify inode
     x => exit subcommand mode

    logs[uper]

     displays the journal log superblock and enters subcommand mode

    SUBCOMMANDS
     m => modify journal log superblock
     x => exit subcommand mode

    q[uit]

     exits xpeek

    se[t] [<variable> <value>]
    * not implemented yet *
     set user-defined  <variable> to <value>
     if no arguments are given, displays all set variables

    <variable> must begin with an alphabetic character

    su[perblock] [p | s]

     displays superblock data
      p displays the primary superblock

    s displays the secondary superblock

    SUBCOMMANDS:
     m => modify entries
     x => exit subcommand mode
     

    s2p[erblock] [p | s]

     displays alternate superblock data

    p displays the primary superblock

    s displays the secondary superblock

    SUBCOMMANDS:
     m => modify entries
     x => exit subcommand mode
     

    u[nset] <variable>
    * not implemented yet *
     deletes user-defined  <variable>

    xt[ree] <inode_number> [<file_set>]

     displays root of the non-directory btree located at <inode_number> and enters a subcommand mode to navigate the btree

    <inode_number> is the directory's inode - given in decimal

    <file_set> currently must be zero

    SUBCOMMANDS
     l => visit left sibling
     m => modify current node
     p => visit parent node (not parent directory)
     r => visit right sibling
     [0-9] => visit the n'th child node
     x => exit subcommand mode

     

    REPORTING BUGS

    If you find a bug in JFS or xpeek, please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:

    http://oss.software.ibm.com/jfs
    

    Please send as much pertinent information as possible, including the complete output of running fsck.jfs with the -v and -n options on the JFS device.

     

    SEE ALSO

    fsck.jfs(8), mkfs.jfs(8), logdump(8), logredo(8), xchklog(8), xchkdmp(8),

     

    AUTHORS

    Barry Arndt  (barndt@us.ibm.com)
    William Braswell, Jr.
    
    
    xpeek is maintained by IBM.
    See the JFS project web site for more details:
    http://oss.software.ibm.com/jfs
    


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    COMMANDS
    REPORTING BUGS
    SEE ALSO
    AUTHORS


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