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string test in IF statement

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# 8  
Old 03-17-2010
File Name Generation
I am using the ksh File Name Generation syntax out of the man pages. This syntax works:



Code:
if [[ $TBS = ?(USERS|TOOLS|SYSAUX) ]] THEN
do something....
fi

If I try to dynamically generate the TBS names the syntax breaks. Like below:

Code:
Orig_File_Num=`$SQLPLUS<<EOF
Connect / as sysdba
Select file_id from dba_data_files;
EOF`

File_Num=`print $Orig_File_Num | sed ‘s/ /|/g'`

If I print $File_Num I will get:

1|2|3|4|5|6

So I know this part is working because I print it to the screen.

But this does not work if I use the variable for the TBS list:

Code:
If [[ $TBS = ?(${File_Num}) ]]
Then
.....
Fi


Any idea how to make this work?

thanks.
# 9  
Old 03-17-2010
Quote:
Originally Posted by djehresmann
I am using the ksh File Name Generation syntax out of the man pages. This syntax works:



Code:
if [[ $TBS = ?(USERS|TOOLS|SYSAUX) ]] THEN
do something....
fi

If I try to dynamically generate the TBS names the syntax breaks. Like below:

Code:
Orig_File_Num=`$SQLPLUS<<EOF
Connect / as sysdba
Select file_id from dba_data_files;
EOF`

File_Num=`print $Orig_File_Num | sed ‘s/ /|/g’`

If I print $File_Num I will get:

1|2|3|4|5|6

So I know this part is working because I print it to the screen.

But this does not work if I use the variable for the TBS list:

Code:
If [[ $TBS = ?(${File_Num}) ]]
Then
…..
Fi

Any idea how to make this work?

thanks.
Code:
eval "
if [[ $TBS = ?(${File_Num}) ]]
then
…..
fi
"

OR use 'case':
Code:
eval "
case ${TBS} in
   ${File_Num} ) echo match
                   ;;
   *             ) echo no match
                   ;;
esac
"

# 10  
Old 03-17-2010
Thanks that works great. I got:

Code:
while ! TRUE
do
  print "enter a datafile number: "
  read DBFILE
 
  if [[ -n $DBFILE ]]
  then
  eval "
    if [[ $DBFILE = ?($NEW_FILEID) ]]
      then
      DBFILE_VALID=true
     else
       print "invalid number"
     fi
     "
  else
   DBFILE_VALID=false
  fi
done


The file numbers are generated dynamically thru sqlplus and placed into $NEW_FILEID. It all works great.

If I enter a character like !, ` , or # in response to the question "enter a datafile number?" it will stop the shell script and exit. How do I trap for those special characters?

thanks.
# 11  
Old 03-18-2010
Code:
# remove all allowed chars, rest is not allowed
extra=$(echo "$DBFILE" | tr -d "[a-z][A-Z][0-9]._" )
[ "$extra" != "" ] && echo "$extra not allowed" >&2  && exit 1
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