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zzcat(1) General Commands Manual zzcat(1) NAME zzcat - concatenate files using different instruction sequences SYNOPSIS zzcat [-AbdeEntTv] [-r loops] [-x sequence] [FILE]... zzcat -l | --list zzcat -h | --help zzcat -V | --version DESCRIPTION The zzcat utility reads files sequentially, writing them to the stan- dard output. The user can decide which sequence of library calls is used to seek and read data. zzcat 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 pro- gram. 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: zzcat -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: zzcat -x 'fread(1,1000)' f Read the first four bytes of f, using four different instructions: zzcat -x 'getc(),fgetc(),getc_unlocked(),_IO_getc()' f Read f entirely, by calling getc() repeatedly until end-of-file is reached: zzcat -x 'repeat(-1, getc(), feof(1))' f Read f entirely, in chunks of 32768 bytes until end-of-file is reached: zzcat -x 'repeat(-1, fread(1,32768), feof(1))' f SEE ALSO zzuf(3), libzzuf(3) AUTHOR Copyright (C) 2002-2010 Sam Hocevar <sam@hocevar.net>. zzcat and this manual page are free software. They come without any warranty, to the extent permitted by applicable law. You can redistrib- ute 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. zzcat 0.13 2010-01-07 zzcat(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | AUTHOR
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