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       zzat - concatenate files using different instruction sequences


       zzat [-AbdeEntTv] [-r loops] [-x sequence] [FILE]...
       zzat -l | --list
       zzat -h | --help
       zzat -V | --version


       The zzat utility reads files sequentially, writing them to the standard
       output. The user can decide which sequence of library calls is used  to
       seek and read data.

       zzat  is  primarily  used  as a debugging tool for zzuf, because it can
       emulate different programs' ways to read files.


       -A, --show-all
              Equivalent to -vET.

       -b, --number-nonblank
              Number nonempty output lines.

       -d, --debug
              Output debugging information.

       -e     Equivalent to -vET.

       -E, --show-ends
              Display $ at end of each line.

       -n, --number
              Number all output lines.

       -r, --repeat=loops
              Concatenate all files loops times.

       -t     Equivalent to -vT.

       -T, --show-tabs
              Display TAB characters as ^I.

       -v, --show-nonprinting
              Use ^ and M- notation, except for LFD and TAB.

       -x, --execute=sequence
              Read a file or a stream using the instruction sequence specified
              in sequence.

              Instructions  are  executed  sequentially  until  the end of the
              program.  End-of-file is not an exit condition, except where the
              feof keyword is used:

                  fread(1,10); feof(1); fread(1,10)

              Loops are permitted using the repeat keyword. Again, feof can be
              used to prematurely break out of a loop:

                  repeat(10000, fgetc() feof(1))

              Instructions can be separated by spaces, commas  or  semicolons.
              A list of all available instructions and control keywords can be
              obtained using this command:

                  zzat -l

              If no sequence is specified, the following default  sequence  is

                  repeat(-1, fread(1,32768), feof(1))

       -l, --list
              Display the list of supported keywords and functions and exit.

       -h, --help
              Display a short help message and exit.

       -V, --version
              Output version information and exit.


       Read the first 1000 bytes of f, then exit:

           zzat -x 'fread(1,1000)' f

       Read the first four bytes of f, using four different instructions:

           zzat -x 'getc(),fgetc(),getc_unlocked(),_IO_getc()' f

       Read  f  entirely,  by  calling  getc() repeatedly until end-of-file is

           zzat -x 'repeat(-1, getc(), feof(1))' f

       Read f entirely, in chunks of 32768 bytes until end-of-file is reached:

           zzat -x 'repeat(-1, fread(1,32768), feof(1))' f


       zzuf(3), libzzuf(3)


       Copyright © 2002-2010 Sam Hocevar <>.

       zzat and this manual page are free  software.  They  come  without  any
       warranty,   to   the  extent  permitted  by  applicable  law.  You  can
       redistribute them and/or modify them under the terms of the Do What The
       Fuck  You  Want  To  Public  License,  Version  2,  as published by Sam
       Hocevar. See for more details.

       zzuf's webpage  can  be  found  at   An
       overview    of    the    architecture    and    inner   works   is   at

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