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Top Forums UNIX for Advanced & Expert Users Finding which file is missing Post 302208830 by SAMZ on Wednesday 25th of June 2008 04:53:09 AM
Old 06-25-2008
everybody thankyou for your help. There is nothing wrong with the nested if statements just wondered if there was a more neat way.

Following on from chachabronsons question i do not understand the above, although i am intrigued as to how it would work.
The above example does not make sense for the following:


FILEA = TestFile1.txt (how would this be declared so the file could be in any case upper, lower or mixture)

FILEB = TestFile2.txt (how would this be declared so the file could be in any case upper, lower or mixture)

if [ ! -f $FILEA ]
then
if [ ! -f $FILEB ]
then
echo "Neither file exists"
exit
else
echo "File A does not exist but file B does"
exit
fi
else
if [ ! -f $FILEB ]
then
echo "File A exists but file B does not"
exit
fi
fi

Therefore if both files present run process
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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