NAME

       zzat - concatenate files using different instruction sequences

SYNOPSIS

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

DESCRIPTION

       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.

OPTIONS

       -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 used:

                  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.

EXAMPLES

       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 reached:

           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

SEE ALSO

       zzuf(3), libzzuf(3)

AUTHOR

       Copyright © 2002-2010 Sam Hocevar <sam@hocevar.net>.

       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 http://sam.zoy.org/wtfpl/COPYING  for
       more details.

       zzuf's  webpage can be found at http://caca.zoy.org/wiki/zzuf.  An overview of the architecture and inner
       works is at http://caca.zoy.org/wiki/zzuf/internals.