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Full Discussion: detecting corrupted file
Top Forums Shell Programming and Scripting detecting corrupted file Post 40893 by Perderabo on Wednesday 24th of September 2003 08:25:57 PM
Old 09-24-2003
I have never heard of behavior like that. What version of unix are you using?

I would try exactly what you did from the command line in a script. I assume that you are using ksh as your login shell. Since the cat command is detecting the problem, go with that. A well written command will return an exit code. See if your cat does. From the command line:
cat goodfile >/dev/null 2>&1
echo $?
cat badfile > /dev/null 2>&1
echo $?

Are the exit codes different?
 

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BZEXE(1)						      General Commands Manual							  BZEXE(1)

NAME
bzexe - compress executable files in place SYNOPSIS
bzexe [ name ... ] DESCRIPTION
The bzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``bzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
bzip2(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
bzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. BZEXE(1)
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