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 standard 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 emu- late 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 ob- tained 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 war- ranty, 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 Pub- lic 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/in- ternals. zzcat 0.13 2010-01-07 zzcat(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | AUTHOR
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