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Re: Finding Binary Files

From: Jon Wilson
Subject: Re: Finding Binary Files
Date: Tue, 31 Oct 2000 16:44:47 +0000 (GMT)

If you don't have or don't want Perl (why? :-0) then you could probably
monkey up a shell script using the Unix 'file' command. Have a look at
'man file' to see exactly how your local version works, but you should be
able to easily tell whether a file is one of 'text', 'executable' or

On Tue, 31 Oct 2000, Derek R. Price wrote:
> 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

Jon Wilson                                          address@hidden
Dept. of Mathematical Sciences
University of Bath, UK                            Tel. (07776) 137939
   "Beware of all enterprises that require new clothes." - Thoreau

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