Dec 20, 2013 at 11:35:36AM -0500, john boris wrote:
> Lance,
> The perl script is called like this from another shell script that does
> some worlk
>
>
> perl weekdays.pl $school
>
> Then in the perl script I am trying to print a long named based on the
> value of $school which ends up as $ARGV[0] in my perl script. What is
> giving me grief is that some of these titles contain single quotes. So I
> was trying to handle the single quote PITA in my PERL script. So in my
> shell script I find out which server I am running the script (That set of
> code works great for all of my scripts) so I set the variable to the
> Server's Long Name. When the name has a single quote I don't get the entire
> variable. The shell will break up the variable so "Cardinal O'Hara" gets
> broke up when it gets passed to the PERL script as Cardinal. So in my shell
> script I set the variable for that server to
>
> "\"Cardinal O'Hara\"" and the variable gets created as "Cardinal \O'Hara"
> but in the perl script that becomes "Cardinal The O'Hara part gets split
> at the space or somewhere. I need that single quote as the people that read
> the report get testy. I figure I might just do it some other way as this is
> getting to a big time PITA for a stupid single quote.
Things to consider -
#!/bin/bash
# It's a win if you can express 'magic' constants once
# and only once in a system.
SCHOOLS="aa ab ac bb cc da db dc"
# --- no changes required beyond this point ---
# Check your inputs, it saves hours of debugging
usage() {
echo "
Usage: $0 <school id>
where <school id> is one of $SCHOOLS
"
exit 1
}
# test for missing argument
[ $1 ] || usage
SCHOOL="$1"
# check argument validity with regular expression
if [[ ! "$SCHOOLS" =~ $SCHOOL ]] ; then
usage
fi
# Sometimes it's easier to turn a pesky quote into some
# easily handled marker, do the processing, and restore the
# original form later on.
read -p "Enter a name with an apostrophe in it: " i
echo "You typed $i"
j=`echo "$i" | sed "s/[']/_MY_QUOTE_/g"`
echo "the munged value is $j"
# (work with with $j without bothering about apostrophe's)
k=`echo "$j" | sed "s/_MY_QUOTE_/'/g"`
echo "The original value is $k"
Applied consistently, these idioms will save you lots
of time and frustration.
--
Charles Polisher
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