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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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CAT(1)								   User Commands							    CAT(1)

NAME
cat - concatenate files and print on the standard output SYNOPSIS
cat [OPTION]... [FILE]... DESCRIPTION
Concatenate FILE(s), or standard input, to standard output. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. EXAMPLES
cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
Report cat bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report cat translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for cat is maintained as a Texinfo manual. If the info and cat programs are properly installed at your site, the command info coreutils 'cat invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 CAT(1)
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