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Re: Finding Binary Files
From: |
Derek R. Price |
Subject: |
Re: Finding Binary Files |
Date: |
Tue, 31 Oct 2000 10:31:53 -0500 |
Manish Koolwal wrote:
> From among a group of files, how can we find out which are Binary files?
> (This is in reference to UNIX). Also, please help me if you know any fast
> method to sagregate Binary Files.
UNIX itself rarely makes a distinction. Some applications (like diff) make
guesses based on the presence/proportion of NUL bytes & other special
characters.
If you have Perl installed, you could use its binary file test operator which
will return true if the first block of the file contains >30% "special"
characters:
perl -e 'exit(!(-f file && -B $ARGV[0]))' <filename>
will return a Bourne shell true value if the file exists and is binary. So
in Bourne form:
#!/bin/sh
for file in "$@"; do
if perl -e 'exit(!(-f file && -B $ARGV[0]))' "$file"; then
# do what I do to binary files
fi
done
Derek
--
Derek Price CVS Solutions Architect ( http://CVSHome.org )
mailto:address@hidden OpenAvenue ( http://OpenAvenue.com )
--
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