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vbuf

man page of vbuf

vbuf: Virtual Ring Buffer shell interface

NAME

vbuf - Virtual Ring Buffer shell interface

SYNOPSIS

vbuf [options]

DESCRIPTION

This manual page documents briefly the vbuf command. vbuf is a program to glue two programs (a producer and a consumer) together, one of which not being able to fulfil the other's constant data rate requirements.

OPTIONS

-h Show short help message. --help Show long help message. -p, --progress Show progress status line. -q, --quiet Suppress progress status line. The default is to show the progress display. -s size, --size=size Set buffer size in bytes. Suffixes k, m, and g may be used. The actual size used will be rounded up for system mapping requirements. The default is 1m, or 1048576 bytes. -t time, --time=seconds Set time in seconds between progress display refreshes. Fractions of a second may be used. Default is 1.500000 seconds. -b, --bits Set progress rate display units to bits per second. -B, --bytes Set progress rate display units to bytes per second. The default is bytes. -d, --decimal Set progress rate display base to decimal. The default is decimal. -x, --hexadecimal Set progress rate display base to hexadecimal. --octal Set progress rate display base to octal. -i file, --input=file Specify an input file to be opened and used instead of using stdin. -o file, --output=file Specify an output file to be opened and used instead of using stdout. -M file, --mapfile=file Specify a file which will be used for backing store for the virtual ring buffer. The allows using filesystem space in case swap space is full. -r bytes, --read-min=bytes Specify the minimum number of bytes to be requested by read. Reading will not happen unless at least this much buffer space is available. The default is 1. -R bytes, --read-max=bytes Specify the maximum number of bytes to be requested by read. Reading will not request more even if more buffer space is available. The default is the full buffer size. -w bytes, --write-min=bytes Specify the minumum number of bytes to be written. Writing will not be done unless at least this much data is available. Once end of file is reached on input, a smaller amount may be written. The default is 1. -W bytes, --write-max=bytes Specify the maximum number of bytes to be written. Writing will not write more each time even if more data is available in the buffer. The default is the full buffer size.
AUTHOR
VRB and vbuf were written by Phil Howard <vrb@ipal.org>. This manual page was written by Szekelyi Szabolcs <cc@mail.3d.hu>, for the Debian project (but may be used by others). 2006 Sep 5 VBUF(1)
 
 
 

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