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Top Forums UNIX for Dummies Questions & Answers Comparing Special characters (i.e. -,\,/) in an if statment Post 302260477 by angelap on Thursday 20th of November 2008 04:01:52 PM
Old 11-20-2008
Comparing Special characters (i.e. -,\,/) in an if statment

I need to validate the special characters of a date (the characters between the year and month & month and day). The data filed is being populated by users and read into the script vi an argument. I want to ensure that the date is a '-' (dash) and not a '/' or '\' (slash).

The every thing I have tried has failed and I have run out of ideas. I'm new to scripting and don't know where else to turn. Please help if you can. Thanks.

# ! /bin/ksh
set -x
V_DATE='2008-08-30'
echo $V_DATE
V_DATE_DASH1=`echo $V_DATE | cut -c 5`
echo 'INFO V_DATE_DASH1: ' $V_DATE_DASH1>>${LOGFILE}
V_DASH='-'
echo 'INFO V_DASH:'$V_DASH>>${LOGFILE}
echo $V_DATE_DASH1 = $V_DASH
if `${V_DATE_DASH1} = ${V_DASH}`
then echo 'INFO V_DATE_DASH1 is OK'>>${LOGFILE}
else echo 'ERROR V_DATE_DASH1 not a "-" '>>${LOGFILE}
usage
fi
 

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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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