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 © 2002-2015 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  the  WTFPL
       Task Force. See http://www.wtfpl.net/ 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.