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 mlocate.db(5)                     mlocate                     mlocate.db(5)
                                  Jan 2007



 NAME
      mlocate.db - a mlocate database


 DESCRIPTION
      A mlocate database starts with a file header: 8 bytes for a magic
      number ("\0mlocate" like a C literal), 4 bytes for the configuration
      block size in big endian, 1 byte for file format version (0), 1 byte
      for the require visibility flag (0 or 1), 2 bytes padding, and a NUL-
      terminated path name of the root of the database.

      The header is followed by a configuration block, included to ensure
      databases are not reused if some configuration changes could affect
      their contents.  The size of the configuration block in bytes is
      stored in the file header.  The configuration block is a sequence of
      variable assignments, ordered by variable name.  Each variable
      assignment consists of a NUL-terminated variable name and an ordered
      list of NUL-terminated values.  The value list is terminated by one
      more NUL character.  The ordering used is defined by the strcmp ()
      function.

      Currently defined variables are:

      prune_bind_mounts
           A single entry, the value of PRUNE_BIND_MOUNTS; one of the
           strings 0 or 1.


      prunefs
           The value of PRUNEFS, each entry is converted to uppercase.


      prunepaths
           The value of PRUNEPATHS.


      The rest of the file until EOF describes directories and their
      contents.  Each directory starts with a header: 8 bytes for directory
      time (seconds) in big endian, 4 bytes for directory time (nanoseconds)
      in big endian (0 if unknown, less than 1,000,000,000), 4 bytes
      padding, and a NUL-terminated path name of the the directory.
      Directory contents, a sequence of file entries sorted by name, follow.

      Directory time is the maximum of st_ctime and st_mtime of the
      directory.  updatedb(8) uses the original data if the directory time
      in the database and in the file system match exactly.  Directory time
      equal to 0 always causes rescanning of the directory: this is
      necessary to handle directories which were being updated while
      building the database.

      Each file entry starts with a single byte, marking its type:



                                    - 1 -           Formatted:  July 6, 2022






 mlocate.db(5)                     mlocate                     mlocate.db(5)
                                  Jan 2007



      0    A non-directory file.  Followed by a NUL-terminated file (not
           path) name.


      1    A subdirectory.  Followed by a NUL-terminated file (not path)
           name.


      2    Marks the end of the current directory.


      locate(1) only reports file entries, directory names are not reported
      because they are reported as an entry in their parent directory.  The
      only exception is the root directory of the database, which is stored
      in the file header.


 AUTHOR
      Miloslav Trmac <mitr@redhat.com>


 SEE ALSO
      locate(1), updatedb.conf(5), updatedb(8)































                                    - 2 -           Formatted:  July 6, 2022