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 BSPLIT(1)                      Version 2.02                       BSPLIT(1)
                               28 January 2004

      bsplit - split a binary file into nnn-byte pieces

      bsplit [ -? ] [ -nnn[K|M|G|T|P|E] ]
             [ -b nnn[K|M|G|T|P|E] ] [ -h ] [ -v ] file(s)

      bsplit splits its argument file(s) into nnn-byte pieces.  The size of
      the pieces is determined by the most-recently encountered size option.

      Splitting of large files is useful for electronic mail transmission
      (32KB is the recommended maximum size), to facilitate FTP file
      transfers over connections that experience fatal timeouts for large
      files, and for transferring files on personal computer floppy disks.

      The split size is always forced internally to be a multiple of 512,
      which is the minimum block size on most current systems.  By ensuring
      that the parts are multiples of file system blocksizes, corruption of
      the pieces through addition of padding garbage on some record-oriented
      file systems can be avoided.

      For text files, where it is desirable to split at line boundaries, use
      split(1) instead.

      The split pieces go into parts named like the argument file, but with
      the suffix -mmm (-001, -002, etc.).

      If no files are specified, then stdin is read and split, and the
      output pieces are named stdin-001, stdin-002, etc.

      On IBM PC DOS and DEC VMS systems, where only a single period is
      allowed in a filename, the suffix is changed to .mmm and it replaces
      any file extension present in the filename.

      IBM PC systems running Microsoft Windows (95, 98, and NT) are treated
      like DOS systems, even though those systems support long filenames
      with multiple periods; that way, the bsplit executable will still work
      correctly on an IBM PC DOS system.

      On IBM PC and DEC VMS systems, the option hyphen prefix, `-', may be
      replaced by a slash, '/'; both are recognized on those systems.  The
      documentation below uses only the hyphen prefix.

      Letter case is ignored in option names: -H and -h are equivalent.

      -?   Give a brief usage display on stderr and exit with a success
           status code.

                                    - 1 -           Formatted:  July 3, 2022

 BSPLIT(1)                      Version 2.02                       BSPLIT(1)
                               28 January 2004

      -b nnn[K|M|G|T|P|E] or
           Define the size, in bytes, of the output pieces; the last one
           may, of course, be shorter than this.  Any size smaller than 1024
           will be reset to 1024, and the size will always be rounded up to
           a multiple of 512 bytes.

           The integer value nnn may be optionally followed by a multiplier
           suffix: K(kilo), M(mega), G(giga), T(tera), P(peta), or E(exa).
           These correspond to powers of the computer unit 1024, rather than
           the usual 1000 of the metric system.

           If this size option is omitted, then 1423K is assumed; this
           peculiar number is the size of an IBM PC 3.5in high-density
           floppy disk, which is a common file transfer medium.

      -h   Give a brief usage display on stderr and exit with a success
           status code.

      -v   Display the program version number and date on stderr and exit
           with a success status code.

      mail(1), split(1), uucp(1C), uue(1), uuencode(1), uuencode(5),
      uusend(1C), uux(1C), xxencode(1).

      This program and its manual page are placed in the public domain.

      Nelson H. F. Beebe
      Center for Scientific Computing
      University of Utah
      Department of Mathematics, 110 LCB
      155 S 1400 E RM 233
      Salt Lake City, UT 84112-0090
      Email:,, (Internet)
      WWW URL:
      FAX: +1 801 581 4148
      Tel: +1 801 581 5254

                                    - 2 -           Formatted:  July 3, 2022