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Full Discussion: testing if files exist
Top Forums UNIX for Dummies Questions & Answers testing if files exist Post 302191036 by Cameron on Thursday 1st of May 2008 10:10:12 AM
Old 05-01-2008
Quote:
Originally Posted by shalua
I need to check following three things:

a) a file exists but is zero byte
b) a file exists with non-zero bytes
c) a file doesn't exist at all

What switches do we use? Is it -f, -s, -z. Please explain the difference in these!

Many Thanks
Shalua
a) ... [ ! -s ${FILENAME} ]
b) ... [ -s ${FILENAME} ]
c) ... [ ! -f ${FILENAME} ]

Hope that sets you in the right direction.
 

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BLOCKDIAG(1)						      General Commands Manual						      BLOCKDIAG(1)

NAME
blockdiag - generate block-diagram image file from spec-text file. SYNOPSIS
blockdiag [options] file DESCRIPTION
This manual page documents briefly the blockdiag commands. blockdiag is a program that generate block-diagram image file from spec-text file. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the SEE ALSO. --version show program's version number and exit -h, --help Show summary of options -a, --antialias Pass diagram image to anti-alias filter -c FILE, --config=FILE read configurations from FILE -o FILE write diagram to FILE -f FONT, --font=FONT use FONT to draw diagram --fontmap=FONT use FONTMAP file to draw diagram -s, --separate Separate diagram images for each group -T TYPE Output diagram as TYPE format --nodoctype Do not output doctype definition tags (SVG only) --no-transparency do not make transparent background of diagram (PNG only) SEE ALSO
The programs are documented fully by http://tk0miya.bitbucket.org/blockdiag/build/html/index.html AUTHOR
blockdiag was written by Takeshi Komiya <i.tkomiya@gmail.com> This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others). May 9, 2011 BLOCKDIAG(1)
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