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Top Forums Shell Programming and Scripting Using arrays in bash using strings to bash built-in true Post 302614457 by Corona688 on Wednesday 28th of March 2012 01:59:41 PM
Old 03-28-2012
I don't think you need any of them at all. You can tell if the variables are blank, why waste more variables storing things you can tell without them?

Also -- just set your defaults in the first place, and let the script change them later if they're given.

Code:
OLDIFS="$IFS"
IFS="|="                # IFS controls splitting. Split on "|" and "=", not whitespace.
set -- $*               # Set the positional parameters to the command line arguments.
IFS="$OLDIFS"

# Just set the default in the first place.
value_cmodIfl="$dflt_cmodIfl"

while [ "$#" -gt 0 ]
do
  case "$1" in

  "--"[cC][mM][oO][dD]|\
  "--"[cC][mM][oO][dD]"-"[iI][fF][lL])
    shift
    value_cmodIfl="$1"
  ;;

  "--"[sS][rR][cC][sS]|\
  "--"[sS][rR][cC][sS]"-"[iI][fF][lL])
    shift
    value_srcsIfl="$1"
  ;;

  "--"[rR][cC][vV][sS]|\
  "--"[rR][cC][vV][sS]"-"[iI][fF][lL])
    shift
    value_rcvsIfl="$1"
  ;;

  *)
    value_bdFileLst="$value_bdFileLst $1"
  ;;

  esac

  shift                 # Skip ahead to the next argument

done

if [ ! -z "$value_rcvsIfl" ]
then
        echo "rcvsIfl given"
fi

 

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shift(1)                                                           User Commands                                                          shift(1)

NAME
shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words SYNOPSIS
sh shift [n] csh shift [variable] ksh * shift [n] DESCRIPTION
sh The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1. csh The components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable not to be set or to have a null value. ksh The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can be any arithmetic expression that evaluates to a non-negative number less than or equal to $#. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 shift(1)
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